JP2006034607A - Sofa bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric sofa bed where the height of a bed frame can be adjusted and which can be used in common as a movable bed and a sofa where a back rest is formed by one motor-driven actuator. <P>SOLUTION: Scott-Russel mechanisms are paired to make a structure of vertically moving the bed frame 1 by one motor-driven actuator 51. When another motor-driven actuator 52 is started to move a reciprocating bar 61 forward, the inclination of the erected back rest 21 is made to be gentle in association with the rotation of a first bell crank 71 to make a flat bed. When the reciprocating bar 61 is moved forward furthermore, in association with the rotation of a second bell crank 71 connected with a cylinder cam 62 via a link 60, the back rest 22 as the sofa is erected in the structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sofa bed. The sofa bed of the present invention may be applied, for example, to create a living environment where the elderly can get up and sit down so that the elderly will not be bedridden and to help independence. More specifically, the sofa bed of the present invention has a function of adjusting the height of the bed frame, and can be used as a movable bed in which the longitudinal direction of the bed bends to form a backrest, and the width direction of the bed is short. It can also be used as a sofa (chaise longue) that bends to form a backrest.

  As a conventional lift bed, a lift bed that has a simple mechanism, can reduce the load on the drive source, and can suppress fluctuations in the lift speed of the bed frame has been invented (for example, Patent Document 1). reference).

  The lifting bed according to Patent Document 1 is provided with a pair of guide members along the longitudinal direction of the bed frame. The pair of guide members are provided on the head side and the foot side of the bed frame, respectively. A pair of guide members are movably mounted on the upper end side of the hoisting leg member, and a short restricting arm is provided between the intermediate part of the hoisting leg member and both end sides of the bed frame as compared with the hoisting leg member. It is connected.

  In addition, one end side of the auxiliary link is movably mounted on a guide member provided along the hoisting leg member at a position near the lower end of the hoisting leg member, while the other end side of the auxiliary link is rotatable with a restricting arm. It is connected. And the space | interval adjustment mechanism is interposed between the upper end side of the hoisting leg member, and the one end side of an auxiliary link.

  This distance adjusting mechanism is a linear motion drive mechanism having a starting shaft that is driven forward and backward by first and second motors, and the motor side is attached to the upper end side of the hoisting leg member, and the starting shaft side is assisted. It is attached to one end of the link. And both the upper end side of the raising / lowering leg member and the one end side of an auxiliary link are moved along each guide member.

  In the lifting bed according to Patent Document 1, when the linear drive mechanism is activated and the activation shaft is driven to move forward and backward at a constant speed, the upper end side of the hoisting leg member and the one end side of the auxiliary link follow the respective guide members. Moving. Then, the distance between the upper end side of the undulating leg member and the one end side of the auxiliary link is adjusted to expand and contract, and the angle between the undulating leg member and the regulating arm is displaced to adjust the height of the bed frame.

  The applicant has invented a multifunctional bed that can be used as a sofa and has a back-up function that allows the upper body side area of the bed to stand up from the lower body side area (see, for example, Patent Document 2).

  The multi-functional bed according to Patent Document 2 includes a bed main body that provides a floor seat defined by a pair of long sides and a pair of short sides, and a shielding member that is disposed on one side of the bed main body along the long sides. And a pedestal that supports the bed body, and an arm mechanism that connects the bed body and the pedestal.

  The bed body is divided into a first side region and a second side region by a long side direction dividing line passing through an intermediate position between the pair of long sides, and the side region is further divided into a pair of short sides. It is divided into an upper body side area and a lower body side area by a short side direction dividing line passing through the intermediate position. The bed body can be tilted about a long-side axis extending in parallel with the long side, and the upper body side section rises from the lower body side section.

  On the other hand, as a bed having both the function of an elevating bed and the function of a movable bed that forms a backrest, an electric bed that can be miniaturized has been invented (see, for example, Patent Document 3).

  The electric bed according to Patent Document 3 includes a floor portion on the upper surface side of the support frame, and swings the back floor located on the front side of the floor constituting the floor portion around the horizontal axis on the rear side. Accordingly, a back floor drive mechanism is provided for switching between the standing posture in which the back floor is raised and the use posture in which the back floor is returned to the horizontal posture. The back floor drive mechanism includes a back floor operation member that swings the back floor, and a speed reduction mechanism that is disposed along the rotation axis direction of the operation member to rotate the back floor operation member. And an electric motor for the back floor.

The electric bed according to Patent Document 3 pivotally connects a knee floor located slightly behind the center in the front-rear direction of the floor constituting the floor and a leg floor located immediately behind the knee floor. In addition, a knee floor drive mechanism is provided for operating the knee floor so that it can swing up and down around the front horizontal axis. The knee floor drive mechanism includes a knee floor operation member for swinging the knee floor, and a rotation shaft of the knee floor operation member for rotating the knee floor operation member. It is comprised from the electric motor for knee floors provided with the deceleration mechanism arrange | positioned along the direction.
JP 2002-315642 A JP 2004-814447 A JP 2003-180762 A

  The lifting bed according to Patent Literature 1 uses two electric actuators (for example, electric motors) to raise and lower the bed frame. There are also many components. As an elevating bed, it is desired that the bed frame can be raised and lowered with one electric actuator, and the configuration is simplified.

  The multi-function bed according to Patent Document 2 uses a single electric actuator to raise and lower the bed frame. However, an electric actuator for forming a backrest and an electric actuator for forming a sofa are provided independently. . It is convenient when it becomes a movable bed by driving one electric actuator (for example, an electric motor) and also becomes a sofa.

  The electric bed according to Patent Document 3 has a simple structure for raising and lowering the back floor and the knee floor by raising and lowering the bed frame with one electric actuator, but it cannot be used as a sofa.

  In this way, it is convenient to have a sofa bed that can be moved up and down by driving one electric actuator, and can be moved and movable by driving one electric actuator.

  In order to solve the above-described problems, the present invention has a function of adjusting the height of the bed frame with a single electric actuator, and can be used as a sofa as a movable bed for forming a backrest with a single electric actuator. An object is to provide an electric sofa bed.

  In order to satisfy the above object, the inventor has a structure in which the bed frame is moved up and down by one electric actuator, and when another electric actuator is activated, the standing backrest has a gentle inclination angle and becomes a flat bed, Furthermore, the backrest as a sofa has a structure that undulates, and the following new sofa bed has been invented.

  (1) A bed frame that is roughly composed of a pair of bed rails extending in parallel and a pair of connecting racks that are connected so as to be orthogonal to the pair of bed rails; A floor seat and two first and second electric actuators. The first electric actuator is driven to raise and lower the bed frame, and the second electric actuator is driven to move the floor. The longitudinal direction of the seat is bent to form the first backrest, or the second electric actuator is driven to bend the short direction of the floor seat to form the second backrest. Sofa bed.

  A sofa bed according to a first aspect of the present invention includes a bed frame that includes a pair of bed rails extending in parallel and a pair of connecting frames that are connected to be orthogonal to the pair of bed rails.

  The pair of bed rails is formed of, for example, a square pipe, and the pair of connecting racks may be formed of, for example, a square pipe or a channel member bent in a U shape. . The pair of bed rails and the pair of connecting racks may be connected by a fastener such as a screw or may be connected by welding.

  Further, the sofa bed according to the first invention includes a floor seat arranged in parallel with the bed frame. This floor seat is divided into four parts vertically and horizontally. The longitudinal direction of the floor seat is bent to form a first backrest. Further, the short direction of the floor seat is bent to form a second backrest.

  For example, the floor seat has a width of about 90 cm and a length of about 180 cm. In the floor seat having such dimensions, the first backrest may be about 70 cm in length (width, about 90 cm), for example, and the second backrest may be about 40 cm in length (width, about 180 cm), for example. ) The dimensions of the floor seat and the lengths of the first and second backrests are appropriately set.

  The sofa bed according to the first invention includes two first and second electric actuators. The first and second electric actuators include, for example, a motor and a piston rod, and the piston rod is advanced and retracted by rotating the motor. The first electric actuator is driven to raise and lower the bed frame. Further, the second electric actuator is driven to bend the longitudinal direction of the floor seat to form the first backrest. Further, the second electric actuator is driven to bend the short direction of the floor seat to form the second backrest.

  As described above, the sofa bed according to the first invention has a function of adjusting the height of the bed frame with one electric actuator, and is further used as a sofa as a movable bed that forms a backrest with one electric actuator. An electric sofa bed that can be used is realized.

  (2) In the sofa bed according to (1), a pair of guide rails opposed to each other supported along the pair of bed rails between the pair of connecting frames, and a pair guided by the pair of guide rails And a pair of moving racks that are arranged orthogonally to the pair of guide rails and slide so as to be close to or separate from each other, and one end of each of the moving racks is rotationally coupled to each other. A pair of other end portions that are rotationally coupled to a pair of leg seats installed on the floor surface with a distance wider than the maximum separation distance of the set of moving racks, and swinging about the other end portion as a rotation center And one end of the pair of swinging legs is rotationally coupled to an intermediate position between the rotation center of one end and the rotation center of the other end. Rotatingly coupled to a pair of connecting racks, A pair of restriction links having a length that is half that of the legs, a wound transmission vehicle that is held by one of the pair of connecting racks, and one movable rack that is disposed far from the one connecting rack One end is fixed to the other, and the other end is fixed to the other moving rack disposed close to the one connection rack, and the wound transmission body is wound around the wound transmission vehicle. The first electric actuator is held on the one connecting rack, and the first piston rod provided on the first electric actuator moves one moving rack disposed far from the one connecting rack, When the first electric actuator is driven to move the first piston rod back and forth, the pair of moving racks connected by the wound transmission body via the wound transmission vehicle approach or separate from each other, The pair of mobile racks A sofa bed, wherein the bed frame moves up and down by changing the inclination of the pair of swinging legs in conjunction with a linear motion approaching or separating from each other.

  In the sofa bed according to the second invention, the pair of guide rails are supported between the pair of connecting racks along the pair of bed rails. The pair of guide rails are supported by the pair of bed rails so as to face each other. Each set of moving racks has a pair of wheels at both edges. The pair of moving racks are arranged orthogonal to the pair of guide rails. The pair of movable racks are guided by the pair of guide rails and slide so as to be close to or away from each other.

  One end portions of the pair of swing legs are rotationally coupled to a pair of movable racks. The pair of leg seats are installed on the floor surface and have an interval wider than the maximum separation interval of the pair of moving racks. The other end portions of the pair of swing legs are rotationally coupled to the pair of leg seats, respectively. The pair of swing legs swings about the other end portion as the center of rotation. The pair of leg seats may be installed on the floor surface via, for example, a free wheel.

  One end portions of the pair of regulating links are rotationally coupled to an intermediate position between the rotation center of one end portion and the rotation center of the other end portion of the pair of swing legs. The other end portions of the pair of restriction links that are at positions opposite to the one end portions of the pair of restriction links are rotationally coupled to the pair of connecting frames. The pair of regulation links has a pair of swing legs and a half length.

  As is well known, Scott Russell's mechanism, which is one of strict linear motion mechanisms, is a mechanism consisting of a four-joint chain with three swivel pairs and one slip pair, and a fixed link that forms a slip pair. This is a mechanism that causes a linear motion to occur at the end point of the movable link that makes a turning pair with the sliding link by a sliding linear motion between the sliding link and the sliding link.

  In this case, the linear motion of the end point of the movable link works in a direction orthogonal to the sliding linear motion. In this Scott Russell mechanism, one end of the restriction link rotates around the middle of the movable link and forms a pair, and the other end of the restriction link forms a pair and turns around. And the regulation link has a half length with a movable link.

  The second invention is applied by combining a pair of the above-described Scott Russell mechanisms. A pair of guide rails corresponds to the fixed link forming the sliding pair, and the pair of wheeled moving racks corresponds to the sliding link forming the sliding pair. Further, the swing leg corresponds to a movable link that rotates and couples with the slide link, and the other end of the swing leg that is rotationally coupled to the leg seat corresponds to the end point of the movable link.

  In the sofa bed configured as described above, the pair of guide rails approaches the leg seat by bringing the pair of movable racks close to each other. That is, the bed frame is lowered. On the other hand, by separating the pair of moving racks from each other, the pair of guide rails are moved away from the leg seats. That is, the bed frame rises.

  And the sofa bed of 2nd invention hold | maintains a to-be-wound transmission vehicle in one connection rack in a pair of connection racks, and the winding transmission body of one moving rack arrange | positioned far from one connection rack. One end is fixed, the other end of the wound transmission body is fixed to the other moving rack arranged close to one connection rack, the winding transmission body is wrapped around the wound transmission vehicle, and one connection rack is The first electric actuator is held in the first electric actuator, and one moving rack disposed far from the one connecting rack is moved by the first piston rod provided in the first electric actuator.

  The wound transmission body may be applied with any one of a belt, a rope, and a chain that is resistant to tensile force but has little resistance to other forces and can be bent freely. When the wound transmission body is a belt or a rope, the wound transmission vehicle may be a pulley, and when the wound transmission body is a chain, the wound transmission vehicle may be a sprocket.

  In this way, when the first piston rod is advanced by connecting the pair of movable racks to each other via the wound transmission body via the wound transmission vehicle, the pair of movable racks are separated from each other. Then, the bed frame can be raised in conjunction with the linear motions that move apart on the pair of moving racks. On the other hand, when the first piston rod is retracted, the pair of moving racks approach each other. And a bed frame can be lowered | hung in response to the linear motion which adjoins in a pair of movable frame.

  The sofa bed according to the second invention has a simple configuration in which the bed frame can be raised and lowered with one electric actuator without raising and lowering the bed frame with two actuators as in the prior art.

  (3) The sofa bed according to (2), wherein the wound transmission vehicle is a timing pulley or a pulley, and the wound transmission body is a timing belt or a rubber belt.

  In the sofa bed according to the third aspect of the invention, since the weight of the bed frame including the human body is held by the tension of the winding transmission body, the shock force and vibration applied to the bed frame are alleviated by the tension of the winding transmission body. A timing belt or a rubber belt is preferable. The timing belt or the rubber belt is bent when it is wound, and the outside expands and the inside contracts. Therefore, a reinforcing material having a small tensile strength and a small elongation may be disposed in the middle portion.

  (4) In the sofa bed according to any one of (1) to (3), a reciprocating bar disposed below the bed frame and moving in parallel with the pair of bed rails, and a circle from the first rotation shaft A second piston provided in the second electric actuator, comprising: a short arm extending in the circumferential direction; and a first bell crank having a plurality of long arms bent by the short arm and the first rotating shaft. The rod is connected to one end of the reciprocating rod and moves the reciprocating rod by advancing and retreating the second piston rod, and the first rotating shaft of the first bell crank is the opening / closing shaft of the first backrest. The pair of bed rails in the vicinity are held in parallel with the opening / closing shaft of the first backrest, and the short arm of the first bell crank is linked to the reciprocating bar moving forward and backward. The tip end of a plurality of long arms formed on the first bell crank is brought into rolling contact with the longitudinal end portion of the floor seat to change the inclination angle of the first backrest. Sofa bed.

  A sofa bed according to a fourth invention includes a reciprocating bar disposed below the bed frame. The reciprocating bar moves in parallel with the pair of bed rails. The second electric actuator includes a second piston rod that moves forward and backward, and this second piston rod is connected to one end of the reciprocating rod. The reciprocating rod is advanced and retracted by advancing and retracting the second piston rod.

  A sofa bed according to a fourth invention includes a first bell crank. The first bell crank has a short arm extending in the circumferential direction from the first rotation shaft. Further, the first bell crank has a plurality of long arms bent by the short arm and the first rotating shaft.

  The first rotation shaft in the first bell crank is formed of, for example, a round pipe. The first pivot shaft of the first bell crank is held in parallel with the opening / closing axis of the first backrest at the position of the pair of bed rails in the vicinity of the opening / closing axis of the first backrest.

  The short arm in the first bell crank has, for example, a boss fixed to the first rotation shaft at one end, and extends in the circumferential direction from the first rotation shaft. The short arm has, for example, a roller at the other end, and this roller is in rolling contact with a slider attached to the reciprocating bar. Then, the first rotation shaft of the first bell crank is rotated in conjunction with the advance and retreat of the reciprocating rod.

  The plurality of long arms in the first bell crank is formed of, for example, a channel member whose one end is joined to the first rotation shaft by welding. The plurality of long arms in the first bell crank each have a roller at the other end, for example, and the plurality of rollers are in rolling contact with the longitudinal end of the floor seat. Then, the inclination angle of the first backrest is changed.

  In the sofa bed according to the fourth aspect of the invention, when the second electric actuator is activated, the second piston rod is advanced, and the inclination angle of the first backrest is moderated from the standing position. If the second electric actuator is stopped, the first backrest can be set and maintained at an arbitrary angle. When the second piston rod advances to a certain distance, the floor seat becomes flat.

  (5) In the sofa bed according to (4), a roller provided at the other end of the reciprocating bar, and a cylindrical cam in which the other end of the reciprocating bar is advanced and retracted along a central axis of the cylinder. A guide groove is formed on the outer periphery to form a linear track parallel to the central axis and a spiral track continuous with the linear track, and the roller entering the guide groove gives a rotational motion by moving the spiral track. A cylindrical cam, a short arm extending in the circumferential direction from the second rotation shaft, a second bell crank having a plurality of long arms bent by the short arm and the second rotation shaft, and the cylindrical cam An arm projecting from the outer periphery of the cylinder, and a link that connects the projecting end of the arm and the extended end of the short arm of the second bell crank by a pair, and the second bell crank The two rotation shafts are held in parallel with the opening / closing shafts of the second backrest at positions of a pair of bed rails in the vicinity of the opening / closing shafts of the second backrest, and the other end of the reciprocating rod is the cylindrical cam The first backrest is restored to form a flat floor seat at the stage where the roller is moved inward and the roller is switched from a linear track to a spiral track, and the reciprocating bar further moves into the cylindrical cam. When guided by the helical trajectory, the tips of the plurality of long arms formed on the second bell crank are in rolling contact with the lateral ends of the floor seat in conjunction with the rotational movement of the cylindrical cam. A sofa bed, wherein the inclination angle of the second backrest is changed.

  A sofa bed according to a fifth invention includes a roller provided at the other end of the reciprocating bar, and a cylindrical cam in which the other end of the reciprocating bar is advanced and retracted along the central axis of the cylinder. A guide groove is provided on the outer periphery of the cylinder of the cylindrical cam. The guide groove is formed with a linear track parallel to the central axis and a spiral track continuous with the linear track.

  A roller provided at the other end of the reciprocating rod enters the guide groove. As the roller moves along the spiral path, a rotational motion is imparted to the cylindrical cam. Thus, the reciprocating bar and the cylindrical cam constitute a three-dimensional cam device. In this three-dimensional cam device, the reciprocating linear motion of the reciprocating rod serving as the moving node is converted into the rotational motion by the spiral trajectory formed in the cylindrical cam serving as the driven node.

  A sofa bed according to a fifth invention includes a second bell crank. The second bell crank has a short arm extending in the circumferential direction from the second rotation shaft. The second bell crank has a plurality of long arms bent along the short arm and the second rotation shaft.

  The second rotation shaft in the second bell crank is formed by, for example, a round pipe. The second rotation shaft of the second bell crank is held in parallel with the opening / closing shaft of the second backrest at the position of the pair of bed rails in the vicinity of the opening / closing shaft of the second backrest.

  The short arm of the second bell crank is formed of, for example, a plate member whose one end is joined to the second rotation shaft by welding, and the other end extends in the circumferential direction from the second rotation shaft. The other end of this short arm is connected to one end of the link by a pair. The other end of this link is connected to the protruding end of the arm protruding from the outer periphery of the cylinder of the cylindrical cam by a pair. The second rotation shaft of the second bell crank is rotated in conjunction with the rotational movement of the arm.

  The plurality of long arms in the second bell crank may be formed of, for example, a channel member whose one end is joined to the second rotation shaft by welding, and the plurality of long arms in the second bell crank is, for example, It may be formed of a channel member having a boss fixed to the second rotation shaft at one end. The plurality of long arms in the second bell crank include, for example, a long arm whose one end is joined to the second rotating shaft by welding and a long arm having a boss fixed to the second rotating shaft at one end as appropriate. May be.

  The plurality of long arms in the second bell crank each have a roller at the tip, for example, and the plurality of rollers are in rolling contact with the short-side end of the floor seat. Then, the inclination angle of the second backrest is changed.

  In the sofa bed according to the fifth invention, at the stage where the other end of the reciprocating bar advances into the cylindrical cam and the roller switches from the linear track to the spiral track, the first backrest returns to form a flat floor seat. The When the reciprocating rod further advances into the cylindrical cam and the roller is guided to the spiral track, the inclination angle of the second backrest is changed in conjunction with the rotational movement of the cylindrical cam.

  Thus, in the sofa bed according to the fifth invention, when the second electric actuator is activated, the second piston rod advances, and the first backrest is gradually inclined from the standing state, and the second piston rod is further moved. When you advance, it changes to a flat bed. When the second piston rod is further advanced, the flat bed is bent in the lateral direction of the floor seat to form the second backrest. If the second electric actuator is stopped, the second backrest can be set and maintained at an arbitrary angle.

  As described above, the sofa bed according to the fifth invention can be used as a movable bed or a sofa that forms a backrest with a single electric actuator.

  (6) In the sofa bed according to any one of (1) to (3), a short arm extending in a circumferential direction from the third rotation shaft, and the short arm and the third rotation shaft are bent. A third bell crank having a plurality of long arms, one end of which is rotationally coupled to the extended end of the short arm of the third bell crank, and the other end of the second piston rod provided in the second electric actuator A first connecting rod that is rotationally coupled to the portion, and advancing and retracting the second piston rod provided in the second electric actuator to advance and retract the first connecting rod connected to the second piston rod, The third rotation shaft of the third bell crank is held in parallel with the opening / closing axis of the first backrest at the position of a pair of bed rails in the vicinity of the opening / closing axis of the first backrest, crank The short arm rotates the third bell crank in conjunction with the advancement and retraction of the first connecting rod, and the ends of a plurality of long arms formed on the third bell crank are at the longitudinal ends of the floor seat. A sofa bed, wherein the tilt angle of the first backrest is changed by rolling contact.

  A sofa bed according to a sixth invention includes a third bell crank. The third bell crank has a short arm extending in the circumferential direction from the third rotation shaft. Further, the third bell crank has a plurality of long arms bent by the short arm and the third rotation shaft.

  The third rotation shaft in the third bell crank is formed of, for example, a round pipe. And the 3rd rotating shaft of the 3rd bell crank is hold | maintained in parallel with the opening-and-closing axis | shaft of a 1st backrest in the position of a pair of bed rail near the opening-and-closing axis | shaft of a 1st backrest.

  A sofa bed according to a sixth aspect of the invention includes a first connecting rod. One end of the first connecting rod is rotationally coupled to the extended end of the short arm of the third bell crank. The other end of the first connecting rod is rotationally coupled to the tip of the second piston rod provided in the second electric actuator. The first connecting rod is advanced and retracted by advancing and retracting the second piston rod. Then, the third rotation shaft of the third bell crank is rotated in conjunction with the advance and retreat of the first connecting rod.

  The plurality of long arms in the third bell crank are formed of, for example, channel members whose one ends are joined to the third rotation shaft by welding. The plurality of long arms in the third bell crank each have a roller at the other end, for example, and the plurality of rollers are in rolling contact with the longitudinal end of the floor seat. Then, the inclination angle of the first backrest is changed.

  In the sofa bed according to the sixth aspect of the invention, when the second electric actuator is activated and the second piston rod is retracted from the most advanced state, the inclination angle of the first backrest from the standing position becomes gentle. If the second electric actuator is stopped, the first backrest can be set and maintained at an arbitrary angle. When the second piston rod is retracted to a certain distance, the floor seat becomes flat.

  (7) In the sofa bed according to (6), a clevis-shaped attachment shaft provided at an end portion of the second electric actuator so as to face the second piston rod, and a first bevel gear are provided at one end portion. A short arm extending in the circumferential direction is provided, and the extended end of the short arm is rotationally coupled to the mounting shaft of the second electric actuator. And a second bevel gear meshing with the first bevel gear has a fifth pivot shaft provided at one end, and the fifth pivot shaft extends in a circumferential direction. And a fourth rotation shaft of the first crank is disposed so that an axial direction thereof is orthogonal to the pair of bed rails, and a fifth rotation of the second crank is provided. The shaft opens and closes the second backrest The pair of bed rails in the vicinity are held in parallel with the opening / closing axis of the second backrest, and when the second piston rod moves backward from the most advanced state, the first backrest returns and is flat. When a second floor is formed and the second piston rod is further retracted, the fifth rotating shaft rotates in conjunction with the rotational movement of the fourth rotating shaft, and a plurality of shafts are formed on the second crank. The sofa bed, wherein a tip of a long arm is brought into rolling contact with a short side end of the floor seat to change an inclination angle of the second backrest.

  A sofa bed according to a seventh aspect includes a clevis-shaped mounting shaft. The attachment shaft is provided at the end of the second electric actuator so as to face the second piston rod. The mounting shaft may be, for example, a single clevis shape or a double clevis shape.

  A sofa bed according to a seventh aspect of the present invention includes a first crank. The first crank has a fourth rotation shaft, and a first bevel gear is provided at one end of the fourth rotation shaft. The fourth rotating shaft is provided with a short arm extending in the circumferential direction, and the extending end of the short arm is rotationally coupled to the mounting shaft of the second electric actuator.

  The fourth rotating shaft of the first crank is formed by, for example, a round bar. One end of the round bar becomes a stepped shaft having an outer diameter smaller than the outer diameter of the round bar, and a first bevel gear is provided on the stepped shaft. The fourth rotating shaft of the first crank is arranged so that the axial direction is orthogonal to the pair of bed rails. For example, the fourth rotation shaft is rotatably held below one of the connecting frames.

  The short arm in the first crank is, for example, formed in a double clevis shape with a pair of plates, and one end of the short arm is joined to the fourth rotating shaft by welding, and the other end of the short arm is 2 A rotating pair and an electric actuator mounting shaft are configured.

  A sofa bed according to a seventh aspect includes a second crank. The second crank has a fifth rotation shaft, and a second bevel gear is provided at one end of the fifth rotation shaft. The fifth rotation shaft is provided with a plurality of long arms extending in the circumferential direction.

  The fifth rotation shaft of the second crank is formed of, for example, a round pipe. A stepped shaft having an outer diameter smaller than the outer diameter of the round pipe is joined to one end of the round pipe, and a second bevel gear is provided on the stepped shaft.

  The fifth rotating shaft of the second crank is held in parallel with the opening / closing shaft of the second backrest at the position of the pair of bed rails in the vicinity of the opening / closing shaft of the second backrest. For example, the fifth rotation shaft is disposed below the pair of connecting frames. For example, a bearing in which one end portion of the fifth rotation shaft is rotatably held by a bearing member provided below one connection frame, and the other end portion of the fifth rotation shaft is provided below the other connection frame. The member is rotatably held.

  The central axis of the first bevel gear and the central axis of the second bevel gear are orthogonal to each other. When the first bevel gear and the second bevel gear mesh with each other, the rotational motion is transmitted between the fourth rotational shaft and the fifth rotational shaft arranged orthogonally. Here, the first bevel gear and the second bevel gear may be “immediately bevel gears” or “coiled bevel gears”.

  The plurality of long arms in the second crank may be formed of, for example, a plate member whose one end is joined to the fifth rotation shaft by welding, and the plurality of long arms in the second crank is, for example, the tip Each of the plurality of rollers includes a plurality of rollers, and the plurality of rollers are in rolling contact with the lateral end of the floor seat. Then, the inclination angle of the second backrest is changed.

  In the sofa bed according to the seventh invention, when the second electric actuator is activated and the two piston rods are retracted from the most advanced state, the first backrest is restored and a flat floor seat is formed. When the second piston rod is further retracted, the short arm of the third bell crank and the short arm of the first crank are attracted to each other.

  Then, the fourth rotating shaft rotates in the first direction by pulling the short arm of the first crank connected to the mounting shaft provided at the end of the second electric actuator. The fifth pivot shaft rotates in conjunction with the rotational movement of the fourth pivot shaft, and the tips of a plurality of long arms formed on the second crank are in rolling contact with the lateral ends of the floor seat. Then, the inclination angle of the second backrest is changed.

  Thus, in the sofa bed according to the seventh aspect of the invention, when the second electric actuator is activated, the second piston rod is retracted, and the inclination angle of the first backrest is gradually lowered from the standing state. When the second piston rod is further retracted, it changes to a flat bed. When the second piston rod is further retracted, the flat bed is bent in the short direction of the floor seat to form the second backrest. If the second electric actuator is stopped, the second backrest can be set and maintained at an arbitrary angle.

  As described above, the sofa bed according to the seventh invention can be used as a movable bed or a sofa that forms a backrest with a single electric actuator. In addition, the sofa bed according to the seventh aspect of the invention is configured with few parts that slide on each other, so that an effect of reducing the generation of noise can be expected.

  (8) In the sofa bed according to any one of (1) to (3), a short arm extending in the circumferential direction from the sixth rotation shaft, and the short arm and the sixth rotation shaft are bent. A sixth bell crank having a plurality of long arms, one end of which is rotationally coupled to an extended end of the short arm of the sixth bell crank, and the other end is a tip of a second piston rod provided in the second electric actuator. A second connecting rod that is rotationally coupled to the portion, and advancing and retracting the second piston rod provided in the second electric actuator to advance and retract the second connecting rod connected to the second piston rod, A sixth rotation shaft of the sixth bell crank is held in parallel with the opening / closing shaft of the first backrest at the position of a pair of bed rails in the vicinity of the opening / closing shaft of the first backrest, crank The short arm rotates the sixth bell crank in conjunction with the advancement and retraction of the second connecting rod, and the ends of a plurality of long arms formed on the sixth bell crank are at the longitudinal ends of the floor seat. A sofa bed, wherein the tilt angle of the first backrest is changed by rolling contact.

  A sofa bed according to an eighth invention includes a sixth bell crank. The sixth bell crank has a short arm extending in the circumferential direction from the sixth rotation shaft. Further, the sixth bell crank has a plurality of long arms bent by the short arm and the sixth rotating shaft.

  The sixth rotation shaft in the sixth bell crank is formed of, for example, a round pipe. The sixth rotation shaft of the sixth bell crank is held in parallel with the opening / closing shaft of the first backrest at the position of the pair of bed rails in the vicinity of the opening / closing shaft of the first backrest.

  A sofa bed according to an eighth invention includes a second connecting rod. One end of the second connecting rod is rotationally coupled to the extended end of the short arm of the sixth bell crank. The other end of the second connecting rod is rotationally coupled to the tip of the second piston rod provided in the second electric actuator. The second connecting rod is advanced and retracted by advancing and retracting the second piston rod. Then, the sixth rotation shaft of the sixth bell crank is rotated in conjunction with the advance and retreat of the second connecting rod.

  The plurality of long arms in the sixth bell crank is formed of, for example, a channel member whose one end is joined to the sixth rotation shaft by welding. The plurality of long arms in the sixth bell crank each have a roller at the other end, for example, and the plurality of rollers are in rolling contact with the longitudinal end of the floor seat. Then, the inclination angle of the first backrest is changed.

  In the sofa bed according to the eighth aspect of the invention, when the second electric actuator is activated and the second piston rod is moved backward from the most advanced state, the inclination angle of the first backrest from the standing position becomes gentle. If the second electric actuator is stopped, the first backrest can be set and maintained at an arbitrary angle. When the second piston rod is retracted to a certain distance, the floor seat becomes flat.

  (9) The sofa bed according to (8), further including a seventh rotating shaft arranged so that an axial direction thereof is orthogonal to the pair of bed rails, and extending in a circumferential direction from the seventh rotating shaft. The extended end portion is a first arm that is rotationally coupled to the mounting shaft of the second electric actuator, and a second arm that extends outward from the seventh rotating shaft with a certain opening angle with the first arm. A seventh bell crank provided with an arm and a cantilever pin that swings about the seventh rotation shaft at the extension end of the second arm; and the opening and closing shaft in the vicinity of the second backrest. A short arm having an eighth rotation shaft held in parallel with the opening / closing shaft of the second backrest at the position of the pair of bed rails, and extending in a circumferential direction from the eighth rotation shaft, and the short Outside the 8th rotation axis with a certain opening angle with the arm A plurality of long arms extending in the direction, and an eighth bell crank provided with both-end support pins that are held by the extended ends of the short arms and are slidably coupled to the cantilever pins to rotate the eighth pivot shaft. When the second piston rod is retracted from the most advanced state, the first backrest is restored to form a flat floor seat, and when the second piston rod is further retracted, the second piston rod is retreated. The eighth pivot shaft rotates in conjunction with the rotational movement of the seventh pivot shaft having a first arm that is rotationally coupled to the mounting shaft of the electric actuator, and a plurality of long shafts formed on the eighth pivot shaft. The sofa bed, wherein the tip of the arm is brought into rolling contact with the end of the floor seat in the short direction to change the inclination angle of the second backrest.

  A sofa bed according to a ninth invention includes a seventh bell crank. The seventh bell crank has a seventh rotation shaft that is arranged so that the axial direction is orthogonal to the pair of bed rails.

  The seventh bell crank is provided with a first arm that extends in a circumferential direction from the seventh rotation shaft, and that the extended end portion is rotationally coupled to the mounting shaft of the second electric actuator. In addition, the seventh bell crank is provided with a second arm extending outward from the seventh rotation shaft with a constant opening angle with the first arm. Further, the seventh bell crank is provided with a cantilever pin that swings around the seventh rotation shaft at the extending end of the second arm.

  The seventh rotation shaft of the seventh bell crank is formed of, for example, a round bar serving as a cantilever shaft. For example, the seventh rotation shaft is rotatably held by a bearing member provided below one of the connecting frames. The first arm and the second arm are formed of an integral block material, for example.

  The extended end portion of the first arm is formed in a single clevis shape, and is rotationally coupled by a pin to a mounting shaft of a second electric actuator formed in a double clevis shape. Further, a cantilever pin parallel to the seventh rotation shaft is press-fitted into the extended end portion of the second arm, for example. The cantilever pin is preferably a steel material having excellent wear resistance, for example.

  A sofa bed according to a ninth invention includes an eighth bell crank. The eighth bell crank has an eighth rotation shaft that is held in parallel with the opening / closing axis of the second backrest at the position of the pair of bed rails in the vicinity of the opening / closing axis of the second backrest.

  The eighth bell crank is provided with a short arm extending in the circumferential direction from the eighth rotation shaft. Further, the eighth bell crank is provided with a plurality of long arms extending in the outer peripheral direction from the eighth rotating shaft with a short opening angle and a constant opening angle. Further, the eighth bell crank is held at the extended end of the short arm, and is provided with both-end support pins that are slidably coupled with the cantilever pin to rotate the eighth pivot shaft.

  The eighth rotation shaft of the eighth bell crank is formed of, for example, a round pipe. For example, the eighth rotation shaft is disposed below the pair of connecting frames. For example, a bearing in which one end portion of the eighth rotation shaft is rotatably held by a bearing member provided below one connection frame, and the other end portion of the eighth rotation shaft is provided below the other connection frame. The member is rotatably held.

  The short arm in the eighth bell crank is formed, for example, in a double clevis shape with a pair of plates, and one end of the pair of short arms is joined to the eighth rotating shaft by welding. Both-end support pins are held at the extended ends of the pair of short arms. The both-end support pins are preferably, for example, steel materials having excellent wear resistance.

  The center axis of the cantilever pin and the center axis of the both end support pins are orthogonal. Since the cantilever pin and the both-end support pins are slidably coupled, the rotational motion is transmitted between the seventh rotational shaft and the eighth rotational shaft arranged orthogonally.

  The plurality of long arms in the eighth bell crank may be formed of, for example, a plate member whose one end is joined to the eighth rotation shaft by welding, and the plurality of long arms in the eighth bell crank are, for example, Each has a roller at its tip, and the plurality of rollers are in rolling contact with the short-side end of the floor seat. Then, the inclination angle of the second backrest is changed.

  In the sofa bed according to the ninth invention, when the second electric actuator is activated and the second piston rod moves backward from the most advanced state, the first backrest returns to form a flat floor seat. When the second piston rod is further retracted, the short arm of the sixth bell crank and the first arm of the seventh bell crank are attracted to each other.

  Then, when the first arm of the seventh bell crank connected to the attachment shaft provided at the end of the second electric actuator is pulled, the seventh rotation shaft rotates in the first direction. The eighth pivot shaft rotates in conjunction with the rotational movement of the seventh pivot shaft, and the tips of the plurality of long arms formed on the eighth bell crank roll to the lateral ends of the floor seat. The inclination angle of the second backrest is changed by contact.

  Thus, in the sofa bed according to the ninth aspect of the invention, when the second electric actuator is activated, the second piston rod is retracted, and the first backrest is gradually inclined from the standing state. When the second piston rod is further retracted, it changes to a flat bed. Further, when the second piston rod is moved backward, the flat bed is bent in the short direction of the floor seat to form the second backrest. If the second electric actuator is stopped, the second backrest can be set and maintained at an arbitrary angle.

  Thus, the sofa bed according to the ninth aspect of the invention can be used as a movable bed or a sofa that forms a backrest with a single electric actuator. In addition, the sofa bed according to the ninth aspect of the present invention is configured with a small number of parts that slide relative to each other, so that an effect of reducing the generation of noise can be expected. Furthermore, unlike the sofa bed according to the seventh aspect of the invention, since there is no backlash due to gears, it can be expected to transmit motion smoothly and have excellent characteristics against vibration, noise, and wear.

  The sofa bed of the present invention has a simple configuration having a function of adjusting the height of the bed frame with a single electric actuator, and further, with one electric actuator, the electric bed can be used as a sofa as a movable bed that forms a backrest. A sofa bed can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective external view of a sofa bed according to a first embodiment of the present invention. FIG. 2 is a front view of the sofa bed according to the first embodiment, in which the longitudinal direction of the floor seat is bent and the first backrest is erected. FIG. 3 is a plan view of the sofa bed according to the first embodiment, and the floor seat is represented by an imaginary line (two-dot chain line).

  4 is a cross-sectional view of the sofa bed of FIG. 3 according to the first embodiment, taken along the line AA, and shows a state in which the second backrest is raised by bending the short direction of the floor seat. (Dotted line). 5 is a cross-sectional view of the sofa bed of FIG. 3 according to the first embodiment, taken along the line B-B. 6 is a cross-sectional view taken along the line CC of the sofa bed of FIG. 3 according to the first embodiment.

  Furthermore, FIG. 7 is a longitudinal sectional view of the sofa bed according to the first embodiment, and is a state diagram in which the second piston rod in the second electric actuator is most retracted. FIG. 8 is a longitudinal sectional view of the sofa bed according to the first embodiment, and best shows the holding state of the second rotating shaft in the second bell crank. FIG. 9 is a longitudinal sectional view of the sofa bed according to the first embodiment, and is a state diagram in which the first piston rod in the first electric actuator is most advanced.

  FIG. 10 is an exploded perspective view of the sofa bed according to the first embodiment, and is a partial configuration diagram of components related to the cylindrical cam. FIG. 11 is an enlarged view of a main part of the sofa bed of FIG. 4 according to the first embodiment. 12 is an enlarged view of a main part of the sofa bed according to the first embodiment, FIG. 12 (A) is a front view of a pair of wheels guided by a pair of guide rails, and FIG. 12 (B) is the wheel. FIG.

  FIG. 13 is a perspective external view of a sofa bed according to the second embodiment of the present invention. FIG. 14 is a front view of the sofa bed according to the second embodiment, in which the longitudinal direction of the floor seat is bent and the first backrest is raised. FIG. 15 is a plan view of the sofa bed according to the second embodiment, and the floor seat is represented by an imaginary line (two-dot chain line).

  16 is a cross-sectional view taken along the line AA of the sofa bed of FIG. 15 according to the second embodiment, and shows a state where the short side direction of the floor seat is bent and the second backrest is raised. FIG. 17 is a longitudinal sectional view of the sofa bed according to the second embodiment, and best shows the fifth rotation shaft of the second crank.

  Further, FIG. 18 is a plan view showing a main part of the sofa bed according to the second embodiment, which is partially in cross section. FIG. 19 is a longitudinal sectional view of the sofa bed according to the second embodiment, in which the second piston rod in the second electric actuator is in the most retracted state.

  FIG. 20 is a plan view of the sofa bed according to the second embodiment, and best shows the wound transmission vehicle and the wound transmission body according to the second embodiment. FIG. 21 is a longitudinal sectional view of the sofa bed according to the second embodiment, and is a state diagram in which the first piston rod in the first electric actuator is most advanced.

  FIG. 22 is a front view of the sofa bed according to the third embodiment, in which the longitudinal direction of the floor seat is bent and the first backrest is erected. FIG. 23 is a plan view of the sofa bed according to the third embodiment, and the floor seat is represented by an imaginary line (two-dot chain line).

  FIG. 24 is a cross-sectional view taken along the line AA of the sofa bed of FIG. 23 according to the third embodiment, and shows an imaginary line (2) where the transverse direction of the floor seat is bent and the second backrest stands upright. (Dotted line). 25 is a cross-sectional view of the sofa bed of FIG. 23 according to the third embodiment, taken along line BB. 26 is a cross-sectional view taken along the line CC of the sofa bed of FIG. 23 according to the third embodiment.

  Furthermore, FIG. 27 is a perspective exploded view of the sofa bed according to the third embodiment, and is a partial configuration diagram of components related to the seventh bell crank and the eighth bell crank. FIG. 28 is a plan view of FIG. FIG. 29 is a front view of FIG. FIG. 30 is a right side view of FIG.

  First, the sofa bed of 1st Embodiment by this invention is demonstrated.

  As shown in FIG. 1 or FIG. 3, the sofa bed 10 according to the first embodiment of the present invention is connected to a pair of bed rails 11, 12 extending in parallel and orthogonal to the pair of bed rails 11, 12. And a pair of connecting racks 13 and 14 are provided.

  The pair of bed rails 11 and 12 are each formed by a square pipe, and the pair of connecting racks 13 and 14 are each formed by a square pipe. Both ends of the connecting frame 13 are connected to the pair of bed rails 11 and 12 with a fastener such as a screw (including a bolt) via a pair of brackets 13a and 13b. Both ends of the connecting frame 14 are connected to the pair of bed rails 11 and 12 through a pair of brackets 14a and 14b with fasteners such as screws (including bolts).

  A connecting frame 15 is arranged at a position opposite to the connecting frame 13. The connecting frame 15 is connected so as to be orthogonal to the pair of bed rails 11 and 12. The connection frame 15 is formed of a square pipe having the same cross section as the connection frame 13, and both ends of the connection frame 15 are fastened with fasteners such as screws (including bolts) via a pair of brackets 13 a and 13 b. It is connected to a pair of bed rails 11 and 12.

  As shown in FIG. 1 or FIG. 3, the sofa bed 10 according to the first embodiment of the present invention includes a floor seat 2 arranged in parallel with the bed frame 1. The floor seat 2 has regions 2a to 2d and is divided into four parts vertically and horizontally. The areas 2 a and 2 b of the floor seat 2 are divided into areas 2 c and 2 d of the floor seat 2 by a dividing line orthogonal to the longitudinal direction of the floor seat 2. The areas 2 a and 2 c of the floor seat 2 are divided into the areas 2 b and 2 d of the floor seat 2 by a dividing line orthogonal to the short direction of the floor seat 2.

  As shown in FIG. 2, the longitudinal direction of the floor seat 2 is bent to form the first backrest 21. That is, the first backrest 21 is composed of the regions 2a and 2b. In addition, as shown in FIG. 4, the lateral direction of the floor seat 2 is bent to form the second backrest 22. That is, the second backrest 22 is composed of the regions 2a and 2c. The floor seat 2 is formed with a width of about 90 cm and a length of about 180 cm. The first backrest 21 has a length of about 70 cm, and the second backrest 22 has a length of about 40 cm. In addition, the dimension of the floor seat 2 and the length of each of the first backrest 21 and the second backrest 22 can be appropriately set.

  Each region 2a to 2d in the floor seat 2 is configured by combining a plurality of square pipes vertically and horizontally. As shown in FIG. 2, the regions 2a and 2b to be the first backrest 21 are connected to the regions 2c and 2d by the opening / closing shafts 21a, respectively. Further, as shown in FIG. 4, the regions 2a and 2c to be the second backrest 22 are connected to the regions 2b and 2d by the opening / closing shafts 22a, respectively.

  As shown in FIG. 1 or FIG. 3, the pair of guide rails 16, 17 is supported between the pair of connecting frames 13, 14 along the pair of bed rails 11, 12. And as FIG. 5 shows, a pair of guide rails 16 and 17 are supported by a pair of bed rails 11 and 12 so that it may mutually oppose. The pair of guide rails 16 and 17 are each formed of a groove-shaped channel member. The pair of guide rails 16 and 17 are joined to the pair of bed rails 11 and 12 in advance by welding, respectively.

  As shown in FIG. 1 or FIG. 3, the pair of moving racks 18 and 19 has a pair of wheels 1e and 1f at both edge ends. The pair of movable racks 18 and 19 are arranged orthogonally to the pair of guide rails 16 and 17, respectively. The pair of movable racks 18 and 19 are guided by the pair of guide rails 16 and 17 and slide so as to be close to or away from each other.

  As shown in FIG. 3, the movable rack 18 is formed of a groove-shaped channel member. On the other hand, as shown in FIG. 12, the movable rack 19 is formed of an equilateral mountain-shaped angle member. Then, as represented by FIG. 12, plate members 19a are welded to both ends of the movable frame 19, and two cantilever shafts 1g are fixed to the plate members 19a. A pair of wheels 1e and 1f are rotatably held on the two cantilever shafts 1g.

  As shown in FIG. 2, one end portions (upper end portions) of the pair of swing legs 31 and 32 are rotationally coupled to a pair of moving racks 18 and 19, respectively. The pair of leg seats 33 and 34 are installed on the floor surface G and have a distance wider than the maximum separation distance of the pair of moving racks 18 and 19. The other end portions (lower end portions) of the pair of swing legs 31 and 32 are rotationally coupled to the pair of leg seats 33 and 34, respectively. And a pair of rocking | fluctuation leg 31 * 32 rock | fluctuates centering on this other end part.

  As shown in FIG. 2, the pair of swing legs 31 and 32 are arranged in line symmetry, and the swing leg 31 and the swing leg 32 have the same configuration and structure. The configuration and structure of the movable leg 32 will be described, and the configuration and structure of the swing leg 31 may be omitted.

  As shown in FIG. 4, the swing leg 32 has a pair of support legs 32a and 32b formed of groove-shaped channel members. The other end portions (lower end portions) of the pair of support legs 32a and 32b having a constant interval are fixed by welding so as to be orthogonal to the connecting legs 32c formed of a round pipe. In order to reinforce the joint strength between the pair of support legs 32a and 32b and the connecting leg 32c, both inner corners of the other ends (lower ends) of the pair of support legs 32a and 32b are joined by the reinforcing members 32d and 32e. Has been.

  At both ends of the connecting leg 32c, a pair of shafts 321 and 322 have coaxial axes and protrude at opposite positions. The pair of shafts 321 and 322 and the leg seats 34a and 34b forming a pair constituting the leg seat 34 are respectively paired with each other. The paired leg seats 34a and 34b are installed at positions separated from each other, but the paired leg seats 34a and 34b may be connected to form the leg seat 34.

  The swing leg 31 has a pair of support legs 31a and 31b formed of groove-shaped channel members. The other end portions (lower end portions) of the pair of support legs 31a and 31b having a constant interval are fixed by welding so as to be orthogonal to the connecting legs 31c formed of a round pipe. In order to reinforce the joint strength of the pair of support legs 31a and 31b and the connecting leg 31c, both inner corners of the other end (lower end) of the pair of support legs 31a and 31b are reinforcing members (not shown). It is joined with.

  At both ends of the connecting leg 31c, a pair of shafts protrudes at opposite positions having a coaxial center. These pair of shafts respectively rotate with the leg seats 33a and 33b forming a pair constituting the leg seat 33, and form a pair. The paired leg seats 33a and 33b are installed at positions separated from each other, but the paired leg seats 33a and 33b may be connected to form the leg seat 33.

  As shown in FIG. 12, one end portion (upper end portion) of the support leg 32 b in the swing leg 32 is rotationally coupled to the movable frame 19. More specifically, the shaft 1h supported at both ends rotatably between the plate members 19a and 19b welded to one end of the movable frame 19 and one end (upper end) of the support leg 32b are rotationally coupled. Yes.

  The shaft 1h supported at both ends in a rotatable manner between the plate members 19a and 19b welded to the other end of the movable frame 19 and one end (upper end) of the support leg 32a are rotationally coupled. Further, one end portions (upper end portions) of the support legs 31a and 31b in the swing leg 31 are also rotationally coupled to the movable frame 18 with the same structure as described above.

  One end portions of the pair of regulation links 35 and 36 are rotationally coupled to an intermediate position between the rotation center of one end portion (upper end portion) and the rotation center of the other end portion (lower end portion) of the pair of swing legs 31 and 32, respectively. . The other end portions that are opposite to the one end portions of the pair of restricting links 35 and 36 are rotationally coupled to the pair of connecting frames 13 and 14, respectively. The restriction link 35 includes a pair of restriction links 35a and 35b, and the restriction link 36 includes a pair of restriction links 36a and 36b.

  The pair of restriction links 35 and 36 have a half length with the pair of swing legs 31 and 32. “The regulation link has half the length of the swing leg” indicates the length of the link structure in the mechanics. As shown in FIG. 2, the pair of restriction links 35 and 36 are each formed in an L shape. However, from the viewpoint of the link configuration in mechanics, the pair of restriction links 35 and 36 are each linear. May be considered.

  As shown in FIG. 1, the other end portions (upper end portions) of the restriction links 35 a and 35 b forming a pair in the restriction link 35 are respectively rotationally coupled to a pair of mounting brackets 13 c and 13 d that are formed to protrude from the connecting frame 13. . Further, as shown in FIG. 3, the other end portions (upper end portions) of the restriction links 36a and 36b forming a pair in the restriction link 36 rotate with a pair of mounting brackets 14c and 14d formed to protrude from the connecting frame 14, respectively. Join.

  Next, as shown in FIG. 2 or FIG. 9, a timing pulley 41 serving as a wound transmission vehicle is held on the connecting frame 13. One end of the timing belt 42 serving as a winding transmission is fixed to one moving frame 19 that is disposed far from the connecting frame 13. The other end of the timing belt 42 is fixed to the other moving rack 18 disposed close to the connection rack 13. The timing belt 42 is wound around the timing pulley 41.

  As shown in FIG. 3, a shaft 41b is supported at both ends by a bracket 41a formed in a double clevis shape, and the timing pulley 41 is rotatably held by the shaft 41b. One end of two stud bolts 41c is fixed to the bracket 41a, and the other end of the stud bolt 41c is fastened to the connecting frame 13 with an nut through an angle member.

  As shown in FIG. 2 or FIG. 9, the first electric actuator 51 is held by the connecting frame 13. The first electric actuator 51 has a first piston rod 51a that advances and retreats. The first piston rod 51 a moves one moving rack 19 disposed far from the connecting rack 13.

  As shown in FIG. 2 or FIG. 9, the first electric actuator 51 has a single clevis-shaped attachment shaft 51b on the head side facing the first piston rod 51a side. On the other hand, the connecting frame 13 is provided with a double clevis-shaped bracket 13e. When the attachment shaft 51b and the tip of the bracket 13e rotate to form a pair, the first electric actuator 51 is swingably held by the connecting frame 13. Similarly, the front end portion of the first piston rod 51a and the bracket 19e provided below the movable frame 19 form a counter pair.

  Next, the operation of the sofa bed 10 of the first embodiment as a lift bed will be described.

  FIG. 2 or FIG. 9 is a state diagram in which the first piston rod 51a has advanced and the pair of moving racks 18 and 19 are separated from each other. When the first electric actuator 51 is activated and the first piston rod 51a is retracted, the movable rack 19 is guided by the pair of guide rails 16 and 17 (see FIG. 3) and slides toward the movable rack 18 side.

  On the other hand, as shown in FIG. 2, the movable rack 18 is rotationally coupled to one end of the swinging leg 31 that is inclined, so that the weight of the bed frame 1 (the weight of the floor seat 2, mattress, human body, etc.) is reduced. Therefore, the moving rack 18 is always subjected to a force that gently tilts the swing leg 31.

  Further, the movable rack 19 is guided and held by a pair of guide rails 16 and 17 (see FIG. 3), and both the movable rack 19 and the movable rack 18 are fixed at both ends of the timing belt 42. 42 is wound around the timing pulley 41.

  Therefore, when the first electric actuator 51 is activated to retract the first piston rod 51a, the moving rack 18 is guided by the pair of guide rails 16 and 17 (see FIG. 3) in conjunction with the moving rack 19. Slide to the moving rack 19 side. That is, the pair of moving racks 18 and 19 are close to each other.

  On the other hand, the swing leg 31 and the restriction link 35 constitute a Scott Russell mechanism. The swing leg 32 and the restriction link 36 constitute a Scott Russell mechanism. The former Scott Russell mechanism and the latter Scott Russell mechanism are arranged symmetrically as shown in FIG. 2, so that the linear motion of the pair of moving racks 18 and 19 parallel to the bed frame 1 is applied to the bed frame. Convert to linear motion orthogonal to 1.

  That is, when the first electric actuator 51 is driven and the first piston rod 51a is retracted, the bed of the pair of swinging legs 31 and 32 is gently moved in conjunction with the movement of the pair of moving racks 18 and 19. Lower frame 1. When the first electric actuator 51 is driven to advance the first piston rod 51a, the bed frame 1 is made steeply inclined with respect to the pair of swing legs 31 and 32 in conjunction with the movement of the pair of moving racks 18 and 19. To raise.

  For example, the bed frame 1 can be set to an arbitrary height by appropriately controlling the first electric actuator 51 such as providing a controller with a lift button. Further, an extension cord is provided in the controller of the first electric actuator 51, and an elevator button is provided on the terminal of the extension cord, so that the bed frame 1 can be used by a person who sleeps or sits on the sofa bed 10 without requiring a caregiver. Can be set to any height.

  Further, since the weight of the bed frame 1 (which may include loads of the floor seat 2, mattress, human body, etc.) depends on the tension of the timing belt 42, the impact force and vibration applied to the bed frame 1 are affected by the timing belt 42. It can be relaxed by the tension.

  Next, the configuration of the sofa bed of the first embodiment according to the present invention as a movable bed or a sofa combined bed will be described.

  As shown in FIG. 2, a reciprocating bar 61 is disposed below the bed frame 1. The reciprocating bar 61 moves in parallel with the pair of bed rails 11 and 12 (see FIG. 3). As shown in FIG. 2 or FIG. 7, the second electric actuator 52 is held by the connecting frame 15. The second electric actuator 51 has a second piston rod 52a that moves forward and backward. A second piston rod 52a is connected to one end of the reciprocating rod 61, and the reciprocating rod 61 is advanced and retracted by advancing and retracting the second piston rod 52a.

  As shown in FIG. 2 or FIG. 7, the second electric actuator 52 has a single clevis-shaped mounting shaft 52b on the head side facing the second piston rod 52a side. On the other hand, the connecting frame 15 is provided with a double clevis-shaped bracket 15e. The mounting shaft 52b and the tip of the bracket 15e rotate to form a pair, so that the second electric actuator 52 is swingably held on the connecting frame 15. Similarly, the tip of the second piston rod 52a rotates with one end of the reciprocating rod 61 to form a pair. Each turning pair on the head side and the rod side in the second electric actuator 52 absorbs the mounting error of the second electric actuator 52.

  As shown in FIG. 10, on the other end portion side of the reciprocating rod 61, a cylindrical cam 62 in which the other end of the reciprocating rod 61 is advanced and retracted along the central axis of the cylinder is disposed. Two cylindrical cam receiving plates 63 are arranged before and after the cylindrical cam 62. The cylindrical cam receiving plate 63 is formed with a counterbore 631 that fits with the outer periphery of the end of the cylindrical cam 62. A through-hole 632 that guides the reciprocating rod 61 to be slidable is formed at the center of the counterbore 631. As shown in FIG. 10, the two cylindrical cam receiving plates 63 are arranged such that the counterbore 631 faces each other.

  As shown in FIG. 10, two brackets 64 are arranged so as to sandwich two opposed cylindrical cam receiving plates 63. The bracket 64 has a flat plate 64a that is in contact with the cylindrical cam receiving plate 63 on one surface, and has two support plates 64b that are fixed to and orthogonal to the other surface of the flat plate 64a. The flat plate 64 a is formed with a relief hole 641 having the same center as the through hole 632. The flat plate 64a of the bracket 64 is fixed to the cylindrical cam receiving plate 63 with a fastener such as a screw.

  As shown in FIG. 10, a support rack 74 is disposed above the two brackets 64. As shown in FIG. 7, one end of the support frame 74 is supported by a bracket 13 g welded to the lower part of the connection frame 13, and the other end of the support frame 74 is the lower part of the connection frame 14. It is supported by a bracket 14g welded to the bracket.

  Some of the components shown in FIG. 10 are assembled in the following procedure, for example. The brackets 64 are fixed to the two cylindrical cam receiving plates 63 in advance. Next, both ends of the cylindrical cam 62 are inserted into counterbore holes 631 of the two cylindrical cam receiving plates 63. Next, the two brackets 64 are fixed to the support frame 74 with the cylindrical cam 62 sandwiched between the two cylindrical cam receiving plates 63 with brackets 64. The distance between the two support plates 64b facing each other in the bracket 64 is slightly larger than the lateral width of the support rack 74, and the two brackets 64 are fixed to the support rack 74 with bolts and nuts. Next, the reciprocating rod 61 is inserted into the two through holes 632 facing each other.

  FIG. 7 is a state diagram in which the components shown in FIG. 10 are assembled. In FIG. 7, the reciprocating rod 61 can be slid by being guided by two through holes 632 facing each other. Further, the cylindrical cam 62 is rotatable by a pair of cylindrical cam receiving plates 63 arranged to face each other.

  Next, the configuration of the first bell crank 71 will be described. The first bell crank 71 has a short arm 71a extending in the circumferential direction from the first rotation shaft 71s, and two long arms 71b and 71c bent by the short arm 71a and the first rotation shaft 71s.

  As shown in FIG. 2 or 3, the first rotation shaft 71 s in the first bell crank 71 is formed of a round pipe. As shown in FIG. 2, the first rotation shaft 71 s is located at the position of the pair of bed rails 11 and 12 (see FIG. 3) near the opening / closing shaft 21 a of the first backrest 21. 21 is held in parallel with the opening / closing shaft 21a.

  As shown in FIG. 3 or FIG. 6, a pair of bearing members 711 and 712 are attached to the pair of bed rails 11 and 12. The pair of bearing members 711 and 712 is formed with a U-shaped groove that fits the tube end of the first rotation shaft 71s. By disposing the U-shaped grooves so as to face each other, both pipe ends of the first rotation shaft 71s are rotatably held. It should be noted that both pipe ends of the first rotation shaft 71s are rotatably held by the implantation bolts 71p so that the rotation center of the first rotation shaft 71s entering the U-shaped groove does not move.

  As shown in FIG. 6 or FIG. 10, one end of the short arm 71a in the first bell crank 71 has a boss 710 fixed to the first rotating shaft 71s. After the boss 710 is fitted to the first rotation shaft 71s, for example, a split pin is driven and the short arm 71a is fixed to the first rotation shaft 71s.

  As shown in FIG. 10, a roller 71r is attached to the other end of the short arm 71a. On the other hand, the reciprocating rod 61 is attached with an angle 60 that serves as a slider. The roller 71r is in rolling contact with the angle 60 serving as a slipper. Then, as shown in FIG. 7, the first rotation shaft 71 s of the first bell crank 71 is rotated in conjunction with the advance and retreat of the reciprocating rod 61.

  As shown in FIG. 6, the two long arms 71b and 71c in the first bell crank 71 are each formed of a groove-shaped channel member. One ends of the two long arms 71b and 71c are joined to the first rotating shaft 71s by welding. A shaft 71d is connected to the other ends of the two long arms 71b and 71c, and rollers 713 to 716 are rotatably held on the shaft 71d.

  Then, as shown in FIG. 2, the rollers 713 to 716 are in rolling contact with the longitudinal ends of the floor seat 2. Then, the inclination angle of the first backrest 21 is changed.

  Next, the operation of the sofa bed 10 of the first embodiment as a movable bed will be described.

  As shown in FIG. 2, due to the weight of the first backrest 21 (which may include the weight of the mattress, human body, etc.), the inclined first backrest 21 is always clockwise with the opening / closing shaft 21a as a fulcrum. A rotating force is acting. The first bell crank 71 interlocked with the first backrest 21 always uses the tips of the two long arms 71b and 71c as the leverage point of the lever, and always uses the first rotation shaft 71s as the pivot point of the lever to rotate clockwise. The rotating force is acting on.

  FIG. 2 or FIG. 6 is a state diagram in which the second piston rod 52a is most retracted, and is held by the second electric actuator 52, and the second piston rod 52a maintains a stopped state. A reciprocating rod 61 is connected to the second piston rod 52a, and an angle 60 serving as a slider is attached to the reciprocating rod 61.

  The roller 71r provided at the tip of the short arm 71a in the first bell crank 71 always urges the angle 60 as an action point of “lever”. That is, in FIG. 2 or FIG. 6, the force with which the reciprocating rod 61 advances is energized. However, since the second piston rod 52a is held by the second electric actuator 52, the first backrest 21 is held in the inclined posture shown in FIG.

  When the second electric actuator 52 is activated and the second piston rod 52a is advanced from the state shown in FIG. 2 or FIG. 6, the first backrest 21 is tilted in conjunction with the advancement of the reciprocating rod 61. To loosen. When the second piston rod 52a is advanced to a predetermined distance, the first backrest 21 becomes flat and the floor seat 2 can be used as a bed.

  When the second electric actuator 52 is started from the state where the first backrest 21 is flat and the second piston rod 52a is retracted, the roller 71r provided at the tip of the short arm 71a is used as a power point of the “lever”. A force that rotates the first rotating shaft 71 s counterclockwise acts on the fulcrum of the “lever”. Then, the first backrest 21 is erected counterclockwise with the tips of the two long arms 71b and 71c as the action point of the “lever”.

  Next, the structure of the sofa bed 10 of 1st Embodiment which concerns on sofa formation is demonstrated.

  As shown in FIG. 10, a pedestal 63 a is fixed to the other end of the reciprocating bar 61. A roller 63c is rotatably installed on the pedestal 63a. The roller 63c is, for example, a ball bearing, and an inner ring is fixed to the pedestal 63a with a hexagon bolt 63c.

  As shown in FIG. 10, in the cylindrical cam 62, the other end of the reciprocating bar 61 is advanced and retracted along the central axis of the cylinder. A guide groove 620 in which a linear track 621 parallel to the central axis of the cylinder and a spiral track 622 continuous with the linear track 621 is provided on the outer periphery of the cylindrical cam 62. As the roller 63b entering the guide groove 620 moves along the spiral track 622, the cylindrical cam 62 is given a rotational motion.

  Next, the configuration of the second bell crank 72 will be described. The second bell crank 72 includes a short arm 72a extending in the circumferential direction from the second rotating shaft 72s and long arms 72b, 72c, 72d, and 72e bent by the short arm 72a and the second rotating shaft 72s. Have.

  As shown in FIG. 8 or FIG. 11, the second rotation shaft 72s in the second bell crank 72 is formed of a round pipe. As shown in FIG. 5, the second rotation shaft 72 s is connected to the opening and closing shaft 22 a of the second backrest 22 at the position of the pair of bed rails 11 and 12 in the vicinity of the opening and closing shaft 22 a of the second backrest 22. They are held in parallel.

  As shown in FIG. 3 or 8, a pair of bearing members 13 f and 14 f are attached to the pair of connecting frames 13 and 14. The pair of bearing members 13f and 14f are provided with bosses that fit into the second rotating shaft 72s. These bosses are arranged so that their axial centers coincide. As shown in FIG. 8, one end of the second rotating shaft 72s is rotatably held by a boss provided on the bearing member 13f, and the other end of the second rotating shaft 72s is a bearing. A boss provided on the member 14f is rotatably held.

  As shown in FIG. 10, the short arm 72a and the long arm 72b are integrally formed of plate members. This plate member is joined to the second rotating shaft 72s by welding. The arm 62 a protrudes from the cylindrical outer periphery of the cylindrical cam 62. And as FIG. 11 shows, the link 70 turns the protrusion end of the arm 62a, and the extension end of the arm 72a, and has connected with the pair.

  Further, as shown in FIG. 8, the long arms 72c and 72d are formed of groove-shaped channel members. One end of the long arms 72c and 72d is joined to the second rotating shaft 72s by welding. The long arm 72e is formed of a groove-shaped channel member, and a boss is provided at one end, and this boss is fixed to the second rotating shaft 72s.

  As shown in FIG. 10, a roller 72r is rotatably held by a stepped screw 72f at the tip of the long arm 72b. As shown in FIG. 8, a roller 72r is rotatably supported by a biaxial support pin at the tip of long arms 72c, 72d and 72e formed of a groove-shaped channel member.

  Next, the operation of the sofa bed 10 of the first embodiment relating to sofa formation will be described.

  In the state where the second piston rod 52a shown in FIG. 2 or 6 is most retracted, the roller 63b provided in the reciprocating rod 61 is located at the right end of the linear track 621 in the cylindrical cam 62 as shown in FIG. positioned.

  As described above, when the second electric actuator 52 is activated and the second piston rod 52a is advanced, the first backrest 21 is gradually inclined in conjunction with the advancement of the reciprocating rod 61. The backrest 21 is flat. During this time, the roller 63b is moving on the linear track 621. That is, at the stage where the other end of the reciprocating bar 61 advances into the cylindrical cam 62 and the roller 63b switches from the linear track 621 to the spiral track 622, the first backrest 21 returns and the flat floor seat 2 is formed. It is formed.

  When the reciprocating rod 61 shown in FIG. 3 further advances into the cylindrical cam 62 and the roller 63b is guided to the spiral track 622, the cylindrical cam 62 starts to rotate. That is, the arm 62a shown in FIG. 11 rotates clockwise. Then, the second bell crank 72 connected to the arm 62a and the link 70 is rotated counterclockwise around the second rotation shaft 72s.

  In conjunction with the rotational movement of the cylindrical cam 62, a roller 72r held at the tip of each of the long arms 72b, 72c, 72d and 72e formed on the second bell crank 72 shown in FIG. Rolling contact is made with the end of the seat 2 in the short direction, and the inclination of the second backrest 22 is raised. (See FIGS. 4, 5, and 11)

  When the reciprocating rod 61 shown in FIG. 3 moves backward from the most advanced state, the arm 62a shown in FIG. 11 rotates counterclockwise. Then, the second bell crank 72 connected to the arm 62a and the link 70 is rotated clockwise around the second rotation shaft 72s.

  Then, the inclination of the second backrest 22 that is in rolling contact with the roller 72r held at the tip of each of the long arms 72b, 72c, 72d, and 72e is moderated, and the roller 63b is cut from the linear track 621 to the spiral track 622. At the stage of change, the second backrest 22 is restored to form the flat floor seat 2.

  In this way, the linear motion of the reciprocating rod 61 is converted into the rotational motion of the cylindrical cam 62, and the long arms 72 b, 72 c, 72 d, 72 e formed on the second bell crank 72 in conjunction with the rotational motion of the cylindrical cam 62. The tip of the rolling contact with the end of the floor 2 in the short direction changes the inclination angle of the second backrest 22.

  For example, the first backrest 21 and the second backrest 2 can be set to an arbitrary inclination angle by appropriately controlling the second electric actuator 52 such as providing a controller with a forward / backward button for the reciprocating rod 61. Moreover, the floor seat 2 can be set to a flat bed. In addition, an extension cord is provided in the controller of the second electric actuator 52, and an advance / retreat button of the reciprocating bar 61 is provided at a terminal of the extension cord, so that a person who sleeps or sits on the sofa bed 10 without requiring a caregiver. Thus, the first and second backrests can be set to an arbitrary inclination angle.

  Next, the sofa bed of 2nd Embodiment by this invention is demonstrated.

  As shown in FIG. 13 or FIG. 15, the sofa bed 100 according to the second embodiment of the present invention is connected to a pair of bed rails 11, 12 extending in parallel and orthogonal to the pair of bed rails 11, 12. And a pair of connecting racks 113 and 114, and a bed frame 101 roughly configured.

  The pair of bed rails 11 and 12 are each formed by a square pipe, and the pair of connecting frames 113 and 114 are each formed by a square pipe. Both ends of the connecting frame 113 are connected to the pair of bed rails 11 and 12 through a pair of brackets 13a and 13b with fasteners such as screws (including bolts). Both ends of the connecting frame 114 are connected to the pair of bed rails 11 and 12 by a fastener such as a screw (including a bolt) via a pair of brackets 13a and 13b.

  As shown in FIG. 13 or FIG. 15, the sofa bed 100 according to the second embodiment of the present invention includes a floor seat 2 that is arranged in parallel with the bed frame 101. In addition, since the structure of the floor seat 2 is the same as 1st Embodiment, description is omitted.

  As shown in FIG. 13 or FIG. 15, the pair of moving racks 118 and 119 have a pair of wheels 1 e and 1 f at both edge ends. The pair of moving racks 118 and 119 are arranged orthogonally to the pair of guide rails 16 and 17, respectively. The pair of moving racks 118 and 119 are guided by the pair of guide rails 16 and 17 and slide so as to be close to or away from each other.

  As shown in FIG. 14, the movable racks 118 and 119 are each formed of an angled mountain-shaped angle member. As represented by FIG. 16, plate members 119a are welded to both ends of the movable frame 119, and two cantilever shafts 1j are fixed to the plate members 19a. A pair of wheels 1e and 1f are rotatably held by the two cantilever shafts 1j.

  As shown in FIG. 14, one end portions (upper end portions) of the pair of swing legs 131 and 132 are rotationally coupled to a pair of moving racks 118 and 119, respectively. The pair of leg seats 133 and 134 are installed on the floor G through the free wheels 137 and have a wider interval than the maximum separation interval of the pair of moving racks 118 and 119. The other end portions (lower end portions) of the pair of swing legs 131 and 132 are rotationally coupled to the pair of leg seats 133 and 134, respectively. And a pair of rocking | fluctuation leg 131 * 132 rock | fluctuates centering on this other end part.

  As shown in FIG. 14, the pair of swing legs 131 and 132 are arranged in line symmetry, and the swing leg 131 and the swing leg 132 have the same configuration and structure. The configuration and structure of the movable leg 132 will be described, and the configuration and structure of the swing leg 131 may be omitted.

  As shown in FIG. 16, the swing leg 132 has a pair of support legs 132a and 132b formed of groove-shaped channel members. The other end portions (lower end portions) of the pair of support legs 132a and 132b having a constant interval are fixed by welding so as to be orthogonal to the connecting legs 132c formed of a round pipe. In order to reinforce the joint strength between the pair of support legs 132a and 132b and the connecting leg 132c, both inner corners of the other ends (lower ends) of the pair of support legs 132a and 132b are joined by the reinforcing members 132d and 132e. Has been.

  As best shown in FIG. 13, the leg seat 134a is composed of a square pipe and an angle member. An angle member is provided below the square pipe. The square pipe is provided with a set of free wheels 137. Further, as shown in FIG. 16, both end portions of the connecting leg 132c have coaxial centers and project at opposite positions, and each of the connecting legs 132c and the leg seats 134a and 134b forming the pair constitute a pair. ing.

  The swing leg 131 has a pair of support legs 131a and 131b formed of groove-shaped channel members. The other end portions (lower end portions) of the pair of support legs 131a and 131b having a constant interval are fixed by welding so as to be orthogonal to the connecting legs 131c formed of a round pipe. In order to reinforce the joint strength between the pair of support legs 131a and 131b and the connecting leg 131c, both inner corners of the other ends (lower ends) of the pair of support legs 131a and 131b are reinforcing members (not shown). It is joined with.

  As shown in FIG. 16, one end (upper end) of the support leg 132 a in the swing leg 132 is rotationally coupled to the movable frame 119. More specifically, the shaft 1h supported at both ends rotatably between the plate members 119a and 119b welded to one end of the movable frame 119 and one end (upper end) of the support leg 132b are rotationally coupled. Yes.

  The shaft 1h supported at both ends so as to be rotatable between the plate members 119a and 119b welded to the other end of the movable frame 119 and one end (upper end) of the support leg 132b are rotationally coupled. Furthermore, one end portions (upper end portions) of the support legs 131a and 131b in the swing leg 131 are also rotationally coupled to the movable frame 118 with the same structure as described above.

  One end portions of the pair of regulation links 135 and 136 are rotationally coupled to an intermediate position between the rotation center of one end portion (upper end portion) and the rotation center of the other end portion (lower end portion) of the pair of swing legs 131 and 132, respectively. . The other end portions that are opposite to the one end portions of the pair of restriction links 135 and 136 are rotationally coupled to the pair of connecting frames 113 and 114, respectively. The restriction link 135 includes a pair of restriction links 135a and 135b, and the restriction link 136 includes a pair of restriction links 136a and 136b.

  The pair of restriction links 135 and 136 have a half length with the pair of swing legs 131 and 132. “The regulation link has half the length of the swing leg” indicates the length of the link structure in the mechanics.

  As shown in FIG. 13, the other end portion (upper end portion) of the restriction link 135 a and the restriction link 135 b (not shown) forming a pair in the restriction link 135 is a pair of mounting brackets 113 c formed to protrude from the connecting frame 113.・ Rotately coupled with 113d respectively. Further, as shown in FIG. 13, the other end portions (upper end portions) of the restriction links 136a and 136b forming a pair in the restriction link 136 are respectively connected to a pair of mounting bearing members 114c and 114d formed to protrude from the connecting frame 114. Rotation coupling.

  Next, as shown in FIG. 20 or FIG. 21, a pulley 43 serving as a wound transmission vehicle is held on the connecting frame 113. One end of the rubber belt 44 serving as a winding transmission is held on one moving rack 119 disposed far from the connecting rack 113 via a bracket 119e. The other end of the rubber belt 44 is held via a bracket 118e on the other moving rack 118 arranged close to the connection rack 113.

  The rubber belt 44 is wound around the pulley 43. The moving frame 118 is provided with a bracket 45a that supports the roller 45b on both axes, and the roller 45b prevents the rubber belt 44 from contacting the moving frame 118.

  As shown in FIG. 20, a shaft 43b is supported at both ends by a bracket 43a formed in a double clevis shape, and a pulley 43 is rotatably held by the shaft 43b. One end of two stud bolts 43c is fixed to the bracket 43a, and the other end of the stud bolt 43c is fastened to the connecting frame 113 with a nut.

  As shown in FIG. 21, the first electric actuator 51 has a single clevis-shaped mounting shaft 51b on the head side facing the first piston rod 51a side. On the other hand, the connecting frame 113 is provided with a double clevis-shaped bracket 13e. When the attachment shaft 51b and the tip of the bracket 13e rotate to form a pair, the first electric actuator 51 is swingably held by the connecting frame 113. Similarly, the tip of the first piston rod 51a and the bracket 119e provided on the movable frame 119 form a counter pair.

  Next, the operation of the sofa bed 100 of the second embodiment as a lift bed will be described.

  FIG. 14 or FIG. 21 is a state diagram in which the first piston rod 51a has advanced and the pair of moving racks 118 and 119 are separated from each other. When the first electric actuator 51 is activated and the first piston rod 51a is retracted, the movable rack 119 is guided to the pair of guide rails 16 and 17 (see FIG. 15) and slides toward the movable rack 118 side.

  On the other hand, as shown in FIG. 14, the movable frame 118 is rotationally coupled to one end of the swinging leg 131 that is inclined, so that the weight of the bed frame 101 (the weight of the floor seat 2, mattress, human body, etc.) is reduced. Therefore, the moving frame 118 is always subjected to a force that gently tilts the swing leg 131.

  Further, the movable frame 119 is guided and supported by a pair of guide rails 16 and 17 (see FIG. 15), and the movable frame 119 and the movable frame 118 are held at both ends of the rubber belt 44. It is wound around a pulley 43.

  Therefore, when the first electric actuator 51 is activated to retract the first piston rod 51a, the moving rack 118 is guided by the pair of guide rails 16 and 17 (see FIG. 15) in conjunction with the moving rack 119. Slide to the moving rack 119 side. That is, the pair of moving racks 118 and 119 are close to each other.

  On the other hand, the swing leg 131 and the regulation link 135 constitute a Scott Russell mechanism. The swing leg 132 and the restriction link 136 constitute a Scott Russell mechanism. Since the former Scott Russell mechanism and the latter Scott Russell mechanism are arranged symmetrically as shown in FIG. 14, the linear motion of the pair of movable racks 118 and 119 parallel to the bed frame 101 is performed. 101 is converted into a linear motion orthogonal to 101.

  That is, when the first electric actuator 51 is driven and the first piston rod 51a is retracted, the bed of the pair of swinging legs 131 and 132 is gently moved in conjunction with the movement of the pair of moving racks 118 and 119. The frame 101 is lowered. When the first electric actuator 51 is driven to advance the first piston rod 51a, the bed frame 101 is abruptly inclined with the inclination of the pair of swing legs 131 and 132 in conjunction with the movement of the pair of moving racks 118 and 119. To raise.

  For example, the bed frame 101 can be set to an arbitrary height by appropriately controlling the first electric actuator 51 such as providing a controller with a lift button. Further, an extension cord is provided in the controller of the first electric actuator 51, and an elevator button is provided at the terminal of the extension cord, so that a bed frame 101 can be formed by a person who sleeps or sits on the sofa bed 100 without requiring a caregiver. Can be set to any height.

  Further, since the weight of the bed frame 101 (which may include loads of the floor seat 2, mattress, human body, etc.) depends on the tension of the rubber belt 44, the impact force and vibration applied to the bed frame 101 are affected by the tension of the rubber belt 44. Can be relaxed.

  Next, the structure of the sofa bed of 2nd Embodiment by this invention as a movable bed or a sofa combined bed is demonstrated.

  As shown in FIG. 13 or FIG. 14, the third bell crank 73 is bent by the short arm 73a extending in the circumferential direction from the third rotating shaft 73s, and the short arm 73a and the third rotating shaft 73s. Two long arms 73b and 73c.

  As shown in FIG. 14 or FIG. 15, the third rotation shaft 73 s in the third bell crank 73 is formed of a round pipe. As shown in FIG. 14, the third rotation shaft 73 s is located at the position of the pair of bed rails 11 and 12 (see FIG. 15) near the opening / closing shaft 21 a of the first backrest 21. 21 is held in parallel with the opening / closing shaft 21a.

  As shown in FIG. 13, the pair of bearing members 114 c and 114 d are attached to the connecting frame 114. The pair of bearing members 114c and 114d rotatably hold both pipe ends of the third rotation shaft 73s (see FIG. 15).

  As shown in FIG. 14, one end of the short arm 73a in the third bell crank 73 is joined to the third rotating shaft 73s by welding. The extended end of the short arm 73a is rotationally coupled to one end of the first connecting rod 8a.

  As shown in FIG. 14 or FIG. 19, the other end of the first connecting rod 8 a is rotationally coupled to the tip of the second piston rod 52 a provided in the second electric actuator 52. Then, the third rotation shaft 73s of the third bell crank 73 is rotated in conjunction with the advance and retreat of the first connecting rod 8a.

  As shown in FIG. 13, the two long arms 73b and 73c in the third bell crank 73 are each formed of a plate member. One end of the two long arms 73b and 73c is joined to the first rotation shaft 73s (see FIG. 15) by welding. Three rollers 73r (see FIG. 14) are rotatably held at the other ends of the two long arms 73b and 73c.

  As shown in FIG. 14, the rollers 713 to 716 are in rolling contact with the longitudinal end portion of the floor seat 2. Then, the inclination angle of the first backrest 21 is changed. As shown in FIG. 14, a link 23 whose one end is rotationally coupled to the frame of the first backrest 21 and whose other end is slidingly coupled to a guide groove formed in a bracket 24 held by the bed frame 101. And the inclination angle of the first backrest 21 may be regulated.

  Next, the operation of the sofa bed 100 in the second embodiment as a movable bed will be described.

  As shown in FIG. 14, due to the weight of the first backrest 21 (which may include the weight of a mattress, human body, etc.), the inclined first backrest 21 is always clockwise with the opening / closing shaft 21a as a fulcrum. A rotating force is acting. The third bell crank 73 interlocked with the first backrest 21 is always clockwise with the tip of the two long arms 73b and 73c as the leverage point of the lever and the third rotation shaft 73s as the fulcrum of the lever. The rotating force is acting on.

  FIG. 14 is a state diagram in which the second piston rod 52a is most advanced, and is held by the second electric actuator 52, and the second piston rod 52a maintains a stopped state. A first connecting rod 8 a is connected to the second piston rod 52 a, and the first connecting rod 8 a is connected to a short arm 73 a in the third bell crank 73.

  The extended end portion of the short arm 73a in the third bell crank 73 urges the force that the first connecting rod 8a moves backward as an action point of “lever”. That is, in FIG. 14, the force that the second piston rod 52a moves backward is urged. However, since the second piston rod 52a is held by the second electric actuator 52, the first backrest 21 is held in the inclined posture shown in FIG.

  When the second electric actuator 52 is activated and the second piston rod 52a is retracted from the state shown in FIG. 14, the short arm 73a connected to the first connecting rod 8a moves the third rotating shaft 73s. Rotate clockwise. Then, in conjunction with the rotational movement of the two long arms 73b and 73c, the first backrest 21 makes its inclination gentle. When the second piston rod 52a is retracted to a predetermined distance, the first backrest 21 becomes flat and the floor seat 2 can be used as a bed.

  When the second electric actuator 52 is started from the state where the first backrest 21 is flat and the second piston rod 52a is advanced, the short arm 73a connected to the first connecting rod 8a has its extended end portion extended. As a force point of the “lever”, a force that rotates the third rotation shaft 73s in a counterclockwise direction acts on a fulcrum of the “lever”. Then, the first backrest 21 is erected counterclockwise with the tips of the two long arms 73b and 73c as the action point of the “lever”.

  Next, the structure of the sofa bed 100 of 2nd Embodiment which concerns on sofa formation is demonstrated.

  As shown in FIG. 14, the single clevis-shaped attachment shaft 52b is provided at the end of the second electric actuator 52 so as to face the second piston rod 52a. As shown in FIG. 18, the first crank 81 has a fourth rotating shaft 81s, and a first bevel gear 81g is provided at one end of the fourth rotating shaft 81s. The fourth rotating shaft 81 s is provided with a short arm 81 a (see FIG. 14) extending in the circumferential direction, and the extending end of the short arm 81 a is rotationally coupled to the mounting shaft 52 a of the second electric actuator 52.

  In FIG. 14, the fourth rotating shaft 81s of the first crank 81 is formed of a round bar. One end of the round bar becomes a stepped shaft having an outer diameter smaller than the outer diameter of the round bar, and a first bevel gear 81g is provided on the stepped shaft. The fourth crank turning shaft 81s of the first crank is arranged so that the axial direction is orthogonal to the pair of bed rails 11 and 12 (see FIG. 15). The fourth rotation shaft 81s is rotatably held by two bearing members 13h (see FIG. 16) below the connecting frame 113 (see FIG. 15).

  In FIG. 14, the short arm 81a in the first crank 81 is formed in a double clevis shape with a pair of plate members, and one end of the short arm 81a is joined to the fourth rotating shaft 81s by welding. The other end of the second electric actuator 52 is connected to the mounting shaft 52b of the second electric actuator 52 and a pin 52d (see FIG. 18), thereby forming a turning pair.

  As shown in FIG. 17 or FIG. 18, the second crank 82 has a fifth rotating shaft 82s, and a second bevel gear 82g is provided at one end of the fifth rotating shaft 82s. The fifth rotating shaft 82s is provided with three long arms 82b, 82c and 82d extending in the circumferential direction.

  The fifth rotation shaft 82s of the second crank 82 is formed of, for example, a round pipe. A stepped shaft having an outer diameter smaller than the outer diameter of the round pipe is joined to one end of the round pipe, and a second bevel gear 82g is provided on the stepped shaft.

  As shown in FIG. 16, the fifth rotation shaft 82 s of the second crank 82 is located at the position of the pair of bed rails 11 and 12 (see FIG. 15) near the opening / closing shaft 22 a of the second backrest 22. The backrest 22 is held in parallel with the open / close shaft 22a.

  As shown in FIG. 17, the fifth rotation shaft 82 s is disposed below the pair of connecting frames 113 and 114. One end portion of the fifth rotation shaft 82s is rotatably held by a bearing member 213 provided below the connection frame 113. A support frame 214 extends from the connection frame 114 so as to be parallel to the fifth rotation shaft 82s. The other end portion of the fifth rotation shaft 82s is rotatably held by a bearing member 314 provided below the support frame 214.

  As shown in FIG. 18, the central axis of the first bevel gear 81g and the central axis of the second bevel gear 82g are orthogonal to each other. When the first bevel gear 81g and the second bevel gear 82g are engaged with each other, the fourth rotary shaft 81s and the fifth rotary shaft 82s are transmitted with rotational motion. Here, the first bevel gear and the second bevel gear may be “immediately bevel gears” or “coiled bevel gears”.

  In FIG. 18, three long arms 82b, 82c, and 82d in the second crank 82 are each formed of a plate member whose one end is joined to the fifth rotating shaft 82s by welding. The three long arms 82b, 82c and 82d in the second crank 82 each have a roller 82r at the tip. As shown in FIG. 16, the three rollers 82 r are in rolling contact with the short-side end of the floor seat 2. Then, the inclination angle of the second backrest 22 is changed.

  Next, the operation of the sofa bed 100 of the second embodiment relating to sofa formation will be described.

  When the second electric actuator 52 is activated and the second piston rod 52a is retracted from the state in which the second piston rod 52a shown in FIG. 13 is most advanced, the third piston connected to the first connecting rod 8a. The short arm 73a of the bell crank 73 rotates clockwise about the third rotation shaft 73s. Then, in conjunction with the rotational movement of the long arms 73b and 73c of the third bell crank 73, the first backrest 21 is restored to form the flat floor seat 2.

  On the other hand, when the second electric actuator 52 is activated and the second piston rod 52a is retracted from the state where the second piston rod 52a shown in FIG. 13 is most advanced, the mounting shaft 52b of the second electric actuator 52 is retracted. The short arm 81a of the first crank 81 connected to the first crank 81 is biased by a force that rotates counterclockwise about the fourth rotation shaft 81s (see FIG. 18).

  That is, the long arms 82b, 82c, and 82d (see FIG. 18) provided on the fourth rotating shaft 81s are applied with a force for shifting from the prone state shown in FIG. 13 to the standing state shown in FIG. Be forced. However, as shown in FIG. 14, in the state where the first backrest 21 stands up, the second backrest 22 (see FIG. 16) (more precisely, the region 2c shown in FIG. 13) stands upright. Therefore, the long arms 82b, 82c, and 82d that contact the second backrest 22 cannot rotate.

  As shown in FIG. 19, when the second electric actuator 52 is activated and the second piston rod 52 a is retracted, the first backrest 21 is restored and the flat floor seat 2 is formed. When the second piston rod 52a is further retracted, the short arm 73a of the third bell crank 73 and the short arm 81a of the first crank 81 are attracted to each other.

  Then, the fourth rotation shaft 81s (see FIG. 19) rotates counterclockwise. The fifth rotation shaft 82s (see FIG. 18) rotates in conjunction with the rotational movement of the fourth rotation shaft 81s. Then, as shown in FIG. 16, the rollers 82r at the tips of the long arms 82b, 82c, and 82d formed on the second crank 82 are brought into rolling contact with the ends of the floor seat 2 in the short direction, and the second The inclination angle of the backrest 22 is changed.

  As shown in FIG. 16, a link 25 whose one end is rotationally coupled to the frame of the second backrest 22 and whose other end is slidingly coupled to a guide groove formed in a bracket 25 held by the bed frame 101. And the inclination angle of the second backrest 22 may be regulated.

  As described above, in the sofa bed 100 according to the second embodiment of the present invention, when the second electric actuator 52 is activated, the second piston rod 52a is retracted, and the first backrest 21 is gradually inclined from the standing state. To do. When the second piston rod 52a is further retracted, it changes to a flat bed. When the second piston rod 52a is further retracted, the flat bed is bent in the short direction of the floor seat, and the second backrest 22 is formed. If the second electric actuator 52 is stopped, the second backrest 22 can be set and maintained at an arbitrary angle.

  As described above, the sofa bed according to the second embodiment of the present invention can be used as a movable bed or a sofa that forms a backrest with a single electric actuator. Moreover, since the sofa bed of 2nd Embodiment by this invention comprises few parts which mutually slide, the effect which reduces generation | occurrence | production of noise can be expected.

  Next, the sofa bed of 3rd Embodiment by this invention is demonstrated.

  As shown in FIG. 22 or FIG. 23, the sofa bed 200 according to the third embodiment of the present invention includes a floor seat 2 that is provided side by side with the bed frame 201. In addition, since the structure of the floor seat 2 is the same as 1st Embodiment, description is omitted.

  Further, the bed frame 201 of the third embodiment has substantially the same configuration except that the connecting frame 151 is provided in place of the connecting frame 15 of the bed frame 1 of the first embodiment, and the description thereof will be omitted.

  Furthermore, since the sofa bed 200 of 3rd Embodiment as an raising / lowering bed is the same as that of the sofa bed 10 of 1st Embodiment as an raising / lowering bed, it abbreviate | omits description. In FIG. 22 and subsequent figures, the same components as those of the sofa bed 10 of the first embodiment are denoted by the same reference numerals.

  Next, the configuration of the sofa bed of the third embodiment according to the present invention as a movable bed or a sofa combined bed will be described.

  As shown in FIG. 22 or FIG. 23 and FIG. 26, the sixth bell crank 76 includes a short arm 76a extending in the circumferential direction from the sixth rotation shaft 76s, and the short arm 76a and the sixth rotation shaft. It has two long arms 76b and 76c that bend at 76s.

  As shown in FIG. 22 or FIG. 23, the sixth rotation shaft 76s in the seventh bell crank 76 is formed of a round pipe. As shown in FIG. 22, the sixth rotation shaft 76 s is located at the position of the pair of bed rails 11 and 12 (see FIG. 23) near the opening / closing shaft 21 a of the first backrest 21. 21 is held in parallel with the opening / closing shaft 21a.

  As shown in FIG. 23, a pair of bearing members 711 and 712 are attached to the pair of bed rails 11 and 12. The pair of bearing members 711 and 712 is formed with a U-shaped groove that fits the tube end of the sixth rotation shaft 76s. By disposing the U-shaped grooves so as to face each other, both pipe ends of the sixth rotation shaft 76s are rotatably held. It should be noted that both pipe ends of the sixth rotation shaft 76s are rotatably held by the implantation bolts 71p so that the rotation center of the sixth rotation shaft 76s entering the U-shaped groove does not move.

  As shown in FIG. 22 or FIG. 26, the short arm 76a in the sixth bell crank 76 is formed in a double clevis shape with a pair of plate members, and one end of the pair of short arms 76a is the sixth rotating shaft. It is joined to 76s by welding.

  As shown in FIG. 22, the extending end of the short arm 76a is rotationally coupled to one end of the second connecting rod 8b. The other end of the second connecting rod 8b is rotationally coupled to the tip of the second piston rod 52a provided in the second electric actuator 52. Then, the sixth rotation shaft 76s of the sixth bell crank 76 is rotated in conjunction with the advance and retreat of the second connecting rod 8b.

  As shown in FIG. 26, the two long arms 76b and 76c in the sixth bell crank 76 are each formed of a groove-shaped channel member. One ends of the two long arms 76b and 76c are joined to the sixth rotating shaft 76s by welding. A shaft 76d is connected to the other ends of the two long arms 76b and 76c, and rollers 763 to 766 are rotatably held on the shaft 76d.

  Then, as shown in FIG. 22, the rollers 763 to 766 are in rolling contact with the longitudinal end portion of the floor seat 2. Then, the inclination angle of the first backrest 21 is changed. As shown in FIG. 22, a link 23 whose one end is rotationally coupled to the frame of the first backrest 21 and whose other end is slidingly coupled to a guide groove formed in a bracket 24 held by the bed frame 201. And the inclination angle of the first backrest 21 may be regulated.

  Next, the operation of the sofa bed 200 in the third embodiment as a movable bed will be described.

  As shown in FIG. 22, due to the weight of the first backrest 21 (which may include the weight of a mattress, a human body, etc.), the inclined first backrest 21 is always clockwise around the opening / closing shaft 21a. A rotating force is acting. The sixth bell crank 76 interlocked with the first backrest 21 is always clockwise with the tip of the two long arms 76b and 76c as the leverage point of the lever and the sixth rotation shaft 76s as the pivot point of the lever. The rotating force is acting on.

  FIG. 22 is a state diagram in which the second piston rod 52a is most advanced, and is held by the second electric actuator 52, and the second piston rod 52a maintains a stopped state. A second connecting rod 8 b is connected to the second piston rod 52 a, and the second connecting rod 8 b is connected to a short arm 76 a in the sixth bell crank 76.

  The extended end portion of the short arm 76a in the sixth bell crank 76 urges the retreating force of the second connecting rod 8b as an action point of “lever”. That is, in FIG. 22, the force that the second piston rod 52a moves backward is urged. However, since the second piston rod 52a is held by the second electric actuator 52, the first backrest 21 is held in the inclined posture shown in FIG.

  When the second electric actuator 52 is activated and the second piston rod 52a is retracted from the state shown in FIG. 22, the short arm 76a connected to the second connecting rod 8b moves the sixth rotating shaft 76s. Rotate clockwise. Then, in conjunction with the rotational movement of the two long arms 76b and 76c, the first backrest 21 makes its inclination gentle. When the second piston rod 52a is retracted to a predetermined distance, the first backrest 21 becomes flat and the floor seat 2 can be used as a bed.

  When the second electric actuator 52 is activated and the second piston rod 52a is advanced from the state in which the first backrest 21 is flat, the short arm 76a connected to the second connecting rod 8b has its extended end. As the force point of the “lever”, a force that rotates the sixth rotation shaft 76s counterclockwise on the fulcrum of the “lever” acts. Then, the first backrest 21 is erected in the counterclockwise direction with the tips of the two long arms 76b and 76c acting as the lever.

  Next, the structure of the sofa bed 200 of 3rd Embodiment which concerns on sofa formation is demonstrated.

  As shown in FIG. 22, the single clevis-shaped attachment shaft 52b is provided at the end of the second electric actuator 52 so as to face the second piston rod 52a. Further, as shown in FIGS. 27 to 30, the seventh bell crank 77 has a seventh rotating shaft 77s arranged so that the axial direction is orthogonal to the pair of bed rails 11 and 12 (see FIG. 23). Have.

  As shown in FIGS. 27 to 30, the seventh bell crank 77 extends in the circumferential direction from the seventh rotation shaft 77 s, and an attachment shaft of the second electric actuator 52 is attached to the extended end portion. A first arm 77a that is rotationally coupled to 52b is provided.

  The seventh bell crank 77 is provided with a second arm 77b extending from the seventh rotating shaft 77s in the outer peripheral direction with a constant opening angle with the first arm 77a. Furthermore, the seventh bell crank 77 is provided with a cantilever pin 77p that swings about the seventh rotation shaft 77s as the rotation center at the extended end of the second arm 77b.

  As shown in FIG. 27 or FIG. 28, the seventh rotation shaft 77s of the seventh bell crank 77 is formed of a round bar serving as a cantilever shaft. One end of the seventh rotation shaft 77s is rotatably held by two rolling ball bearings 771. Two rolling ball bearings 771 are held by a housing 770. The housing 770 is provided below the connecting frame 13 via an attachment member 772.

  As shown in FIG. 27, the first arm 77a and the second arm 77b are formed of an integral block material. The extending end of the first arm 77a is formed of a plate material, and the base end of the first arm 77a is joined by welding. The first arm 77a and the second arm 77b that are integrated with each other are provided with a shaft hole 77h into which the other end of the seventh rotation shaft 77s is fitted, and a slit that penetrates the shaft hole 77h. The seventh rotation shaft 77s is fixed to the first arm 77a and the second arm 77b which are formed integrally by fastening the slit with a fastener such as a bolt.

  As shown in FIGS. 27 to 30, the extending end of the first arm 77a is formed in a single clevis shape, and the mounting shaft 52b of the second electric actuator 52 formed in a double clevis shape, The pin 52p is rotationally coupled. In addition, a cantilever pin 77p parallel to the seventh rotation shaft 77s is press-fitted into the extended end of the second arm 77b. The cantilever pin 77p is formed of a steel material having excellent wear resistance.

  As shown in FIG. 24, the eighth bell crank 78 is parallel to the opening / closing shaft 22a of the second backrest 22 at the position of the pair of bed rails 11 and 12 in the vicinity of the opening / closing shaft 22a of the second backrest 22. It has the 8th rotating shaft 78s hold | maintained.

  The eighth bell crank 78 is provided with a short arm 78a (see FIG. 29) extending in the circumferential direction from the eighth rotating shaft 78s. The eighth bell crank 78 is provided with a short arm 78a and a plurality of long arms 78b, 78c and 78d (see FIG. 23) extending from the eighth rotating shaft 78s in the outer peripheral direction with a constant opening angle. . Further, as shown in FIG. 27, the eighth bell crank 78 is held at the extended end of the short arm 78a and is slidably coupled to the cantilever pin 77p to rotate the eighth rotating shaft 78s. 78p is provided.

  As shown in FIG. 23 or FIG. 29, the eighth pivot shaft 78s of the eighth bell crank 78 is formed of a round pipe. The eighth rotating shaft 78s is disposed below the pair of connecting frames 13 and 14. As shown in FIG. 29, one end portion of the eighth rotation shaft 78s is rotatably held by a bearing member 781 provided below the connecting frame 13, and the other end portion of the eighth rotation shaft 78s is held. It is rotatably held by a bearing member 782 (see FIG. 23) provided below the connecting frame 14.

  As shown in FIGS. 27 to 29, the short arm 78a in the eighth bell crank 78 is formed in a double clevis shape with a pair of plates, and one end of the pair of short arms 78a is an eighth rotating shaft 78s. Are joined by welding. Both end support pins 78p are held at the extended ends of the pair of short arms 78a. Both end support pins 78p are formed of a steel material having excellent wear resistance.

  As shown in FIGS. 27 to 29, the center axis of the cantilever pin 77p and the center axis of the both-end support pins 78p are orthogonal to each other. Since the cantilever pin 77p and the both-end support pin 78p are slidably coupled, the rotational motion is transmitted between the seventh rotational shaft 77s and the eighth rotational shaft 78s arranged orthogonally.

  As shown in FIG. 23, the plurality of long arms 78b, 78c, and 78d in the eighth bell crank 78 are formed of plate members whose one ends are joined to the eighth rotating shaft 78s by welding. The plurality of long arms 78b, 78c, and 78d have rollers 78s at their tips.

  Then, as shown in FIG. 24, the plurality of rollers 78r are in rolling contact with the short-side end portion of the floor seat 2. Then, the inclination angle of the second backrest 22 is changed. As shown in FIG. 25, a link 25 having one end rotationally coupled to the frame of the second backrest 22 and the other end slidingly coupled to a guide groove formed in a bracket 25 held by the bed frame 201. And the inclination angle of the second backrest 22 may be regulated.

  Next, the operation of the sofa bed 200 according to the third embodiment relating to sofa formation will be described.

  As shown in FIG. 22, when the second electric actuator 52 is activated and the second piston rod 52a is retracted from the state where the second piston rod 52a is most advanced, the second piston rod 52a is connected to the second connecting rod 8b. The short arm 76a of the sixth bell crank 76 rotates clockwise around the sixth rotation shaft 76s. Then, in conjunction with the rotational movement of the long arms 76b and 76c of the sixth bell crank 76, the first backrest 21 is restored to form the flat floor seat 2.

  On the other hand, when the second electric actuator 52 is activated and the second piston rod is retracted from the state where the second piston rod 52a shown in FIG. 22 is most advanced, the short arm 76a of the sixth bell crank 76 The first arms 77a of the seventh bell crank 77 are attracted to each other. Then, a force that rotates clockwise around the seventh rotation shaft 77s (see FIG. 30) is urged. As shown in FIG. 29, the force by which the seventh rotation shaft 77s rotates in the clockwise direction is transmitted as the force by which the eighth rotation shaft 78s rotates in the counterclockwise direction.

  That is, the long arms 78b, 78c, and 78d (see FIG. 23) provided on the eighth rotating shaft 78s are applied with a force to shift from the prone state shown in FIG. 24 to the standing state shown in FIG. Be forced. However, as shown in FIG. 22, in the state where the first backrest 21 stands, the second backrest 22 (see FIG. 24) (more precisely, the region 2c shown in FIG. 23) stands up. Therefore, the long arms 78b, 78c, and 78d that are in contact with the second backrest 22 cannot rotate.

  When the second electric actuator 52 is activated and the second piston rod 52a is retracted, the first backrest 21 is restored and the flat floor seat 2 is formed. When the second piston rod 52a is further retracted, the short arm 76a of the sixth bell crank 76 and the first arm 77a of the seventh bell crank 77 are attracted to each other.

  Then, the seventh rotation shaft 77s (see FIG. 30) rotates counterclockwise. The eighth rotation shaft 78s (see FIG. 29) rotates in conjunction with the rotational movement of the seventh rotation shaft 77s. Then, as shown in FIG. 25, the rollers 82r at the tips of the long arms 78b, 78c, and 78d formed on the eighth bell crank 78 are brought into rolling contact with the short-side ends of the floor 2 and the second arms 78b, 78c, and 78d. The inclination angle of the backrest 22 is changed.

  As shown in FIG. 25, a link 25 having one end rotationally coupled to the frame of the second backrest 22 and the other end slidingly coupled to a guide groove formed in a bracket 25 held by the bed frame 201. And the inclination angle of the second backrest 22 may be regulated.

  As described above, in the sofa bed 200 according to the third embodiment, when the second electric actuator 52 is activated, the second piston rod 52a is retracted, and the first backrest 21 is gradually inclined from the standing state. When the second piston rod 52a is further retracted, it changes to a flat bed. Further, when the second piston rod 52a is moved backward, the flat bed is bent in the short direction of the floor seat 2 and the second backrest 22 is formed. If the second electric actuator 52 is stopped, the second backrest 22 can be set and maintained at an arbitrary angle.

  As described above, the sofa bed according to the third embodiment of the present invention can be used as a movable bed or a sofa that forms a backrest with a single electric actuator. Moreover, since the sofa bed of 3rd Embodiment by this invention comprises few parts which slide mutually, the effect which reduces generation | occurrence | production of noise can be expected. Further, unlike the sofa bed according to the second embodiment, since there is no backlash due to gears, it can be expected to transmit motion smoothly and have excellent characteristics against vibration, noise, and wear.

1 is a perspective external view of a sofa bed according to an embodiment of the present invention. It is a front view of the sofa bed by 1st Embodiment, and the longitudinal direction of a floor seat bends and it is a state figure in which the 1st backrest stood up. It is a top view of the sofa bed by 1st Embodiment, and represents the floor seat with the imaginary line. FIG. 4 is a cross-sectional view taken along the line AA of the sofa bed of FIG. 3 according to the first embodiment, and shows a state in which the short direction of the floor seat is bent and the second backrest is raised by an imaginary line. It is BB arrow sectional drawing of the sofa bed of FIG. 3 by 1st Embodiment. It is CC sectional view taken on the line of the sofa bed of FIG. 3 by 1st Embodiment. It is a longitudinal cross-sectional view of the sofa bed by 1st Embodiment, and is a state figure in which the 2nd piston rod in the 2nd electric actuator has retracted most. It is a longitudinal cross-sectional view of the sofa bed by 1st Embodiment, and has shown the holding state of the 2nd rotating shaft in a 2nd bell crank best. It is a longitudinal cross-sectional view of the sofa bed by 1st Embodiment, and is the state figure which the 1st piston rod in the 1st electric actuator has advanced most. It is a perspective exploded view of the sofa bed by 1st Embodiment, and is a partial block diagram of the component relevant to a cylindrical cam. FIG. 11 is an enlarged view of a main part of the sofa bed of FIG. 4 according to the first embodiment. It is a principal part enlarged view of the sofa bed by 1st Embodiment, FIG. 12 (A) is a front view of a pair of wheel guided by a pair of guide rail, FIG.12 (B) is sectional drawing of the said wheel. is there. It is a perspective appearance figure of a sofa bed by a 2nd embodiment of the present invention. It is a front view of the sofa bed by 2nd Embodiment, and the longitudinal direction of a floor seat bends and it is a state figure in which the 1st backrest stood up. It is a top view of the sofa bed by 2nd Embodiment, and represents the floor seat with the imaginary line (two-dot chain line). It is AA arrow sectional drawing of the sofa bed of FIG. 15 by 2nd Embodiment, and the short side direction of the floor seat bends and the 2nd backrest has stood up. It is a longitudinal cross-sectional view of the sofa bed by 2nd Embodiment, and has shown the 5th rotating shaft of the 2nd crank best. It is a top view which shows the principal part of the sofa bed by 2nd Embodiment, and is made into the cross section partially. It is a longitudinal cross-sectional view of the sofa bed by 2nd Embodiment, and is a state figure in which the 2nd piston rod in the 2nd electric actuator has retracted most. It is a top view of the sofa bed by 2nd Embodiment, and best shows the to-be-wrapped transmission vehicle and winding transmission by 2nd Embodiment. It is a longitudinal cross-sectional view of the sofa bed by 2nd Embodiment, and is a state figure in which the 1st piston rod in the 1st electric actuator has advanced most. It is a front view of the sofa bed by 3rd Embodiment, and the longitudinal direction of a floor seat bends and it is a state figure in which the 1st backrest stood up. It is a top view of the sofa bed by 3rd Embodiment, and represents the floor seat with the imaginary line (two-dot chain line). It is AA arrow sectional drawing of the sofa bed of FIG. 23 by 3rd Embodiment, and the short direction of the floor seat bends and the 2nd backrest has stood up. It is BB arrow sectional drawing of the sofa bed of FIG. 23 by 3rd Embodiment. It is CC arrow sectional drawing of the sofa bed of FIG. 23 by 3rd Embodiment. It is a perspective exploded view of the sofa bed by 3rd Embodiment, and is a partial block diagram of the component relevant to a 7th bell crank and an 8th bell crank. It is a top view of FIG. It is a front view of FIG. It is a right view of FIG.

Explanation of symbols

1.101.201 Bed frame 1e.1f Wheel 2. Floor seat 10.100.200 Sofa bed 8a First connecting rod 8b Second connecting rod 11.12 Bed rail 13.14.113.114 Connecting frame 16.17 Guide rail 18, 19, 118, 119 Moving rack 21 First backrest 21a Opening / closing axis 22 Second backrest 22a Opening / closing axis 31/32/131/132 Oscillating legs 33/34/133/134 Leg seat 35/36/135 / 136 Restricted link 41 Timing pulley (wound transmission vehicle)
42 Timing belt (wound transmission)
43 Pulley (wound drive gear)
44 rubber belt 51 first electric actuator 51a first piston rod 52 second electric actuator 52a second piston rod 52b mounting shaft 61 reciprocating rod 62 cylindrical cam 62a arm 63b roller 70 link 71 first bell crank 71a short arm 71b / 71c long arm 71s 1st rotating shaft 72 2nd bell crank 72a short arm 72b / 72c / 72d / 72e long arm 72s 2nd rotating shaft 73 3rd bell crank 73a short arm 73b / 73c long arm 73s 3rd rotating shaft 76 first 6 bell crank 76a short arm 76b / 76c long arm 76s sixth rotating shaft 77 seventh bell crank 77a first arm 77b second arm 77p cantilever pin 77s seventh rotating shaft 78 eighth bell crank 78a short arm 78b, 78c, 78d Long arm 78p Both ends support pin 78s 8th rotation shaft 81 1st crank 81a Short arm 81g 1st bevel gear 81s 4th rotation shaft 82 2nd crank 82b, 82c, 82d Long arm 82g 1st Two bevel gears 82s Fifth rotation shaft 620 Guide groove 621 Straight track 622 Spiral track G Floor

Claims (9)

A bed frame roughly constituted by a pair of bed rails extending in parallel and a pair of connecting racks connected to be orthogonal to the pair of bed rails;
A floor seat that is juxtaposed on this bed frame and divided into four parts vertically and horizontally;
Two first and second electric actuators,
The first electric actuator is driven to raise and lower the bed frame, and the second electric actuator is driven to bend the longitudinal direction of the floor seat to form the first backrest, or the second A sofa bed, wherein a second backrest is formed by bending the short direction of the floor seat by driving an electric actuator. The sofa bed according to claim 1, wherein
A pair of opposing guide rails supported along the pair of bed rails between the pair of connecting frames;
A pair of moving racks that have a pair of wheels guided by the pair of guide rails at both edge ends, are arranged orthogonal to the pair of guide rails, and slide in proximity to or away from each other;
One end of each of the pair of moving racks is rotationally coupled to each other, and the other end of each of the pair of leg seats installed on the floor surface is coupled to each other by a distance wider than the maximum separation distance of the pair of movable racks. And a pair of swinging legs swinging around the other end,
One end of the pair of swinging legs is rotationally coupled to an intermediate position between the center of rotation of one end and the center of rotation of the other end, and the other end opposite to the one end rotates to the pair of connecting frames. A pair of regulating links coupled and having a pair of swing legs and a half length;
A wound transmission vehicle held by one of the pair of connecting racks;
One end is fixed to one moving rack arranged far from the one connecting rack, and the other end is fixed to the other moving rack arranged close to the one connecting rack, to the wound transmission vehicle. A wound transmission body to be wound,
The first electric actuator is held on the one connecting rack, and the first piston rod provided on the first electric actuator moves one moving rack disposed far from the one connecting rack,
When the first electric actuator is driven to move the first piston rod back and forth, the pair of moving racks connected by the wound transmission body via the wound transmission vehicle approach or separate from each other, A sofa bed, wherein the bed frame moves up and down by changing the inclination of the pair of swinging legs in conjunction with a linear motion approaching or separating from each other on the set of moving racks.   The sofa bed according to claim 2, wherein the wound transmission vehicle is a timing pulley or a pulley, and the wound transmission body is a timing belt or a rubber belt. The sofa bed according to any one of claims 1 to 3,
A reciprocating bar disposed below the bed frame and moving in parallel with the pair of bed rails;
A short arm extending in the circumferential direction from the first rotation shaft, and a first bell crank having a plurality of long arms bent by the short arm and the first rotation shaft,
A second piston rod provided in the second electric actuator is connected to one end of the reciprocating rod, and advances and retracts the reciprocating rod by advancing and retracting the second piston rod;
The first rotation shaft of the first bell crank is held in parallel with the opening / closing axis of the first backrest at a position of a pair of bed rails in the vicinity of the opening / closing axis of the first backrest, The short arm of the bell crank rotates the first bell crank in conjunction with the reciprocation of the reciprocating rod, and the ends of a plurality of long arms formed on the first bell crank are end portions in the longitudinal direction of the floor seat. The sofa bed is characterized in that the tilt angle of the first backrest is changed by rolling contact with the sofa bed. The sofa bed according to claim 4,
A roller provided at the other end of the reciprocating rod;
A cylindrical cam in which the other end of the reciprocating rod is advanced and retracted along the central axis of the cylinder, and a linear track parallel to the central axis and a spiral track continuous with the linear track are formed on the outer periphery of the cylindrical cam. A cylindrical cam that is provided with a guide groove and is provided with a rotational movement by the roller entering the guide groove moving on the spiral track;
A second bell crank having a short arm extending in a circumferential direction from the second rotation shaft, and a plurality of long arms bent by the short arm and the second rotation shaft;
An arm protruding from the outer circumference of the cylinder of the cylindrical cam;
A link that rotates around the protruding end of the arm and the extended end of the short arm of the second bell crank, and couples it with a pair.
The second rotation shaft of the second bell crank is held in parallel with the opening / closing shaft of the second backrest at a position of a pair of bed rails in the vicinity of the opening / closing shaft of the second backrest, At the stage where the other end of the roller advances into the cylindrical cam and the roller switches from a linear track to a spiral track, the first backrest returns to form a flat floor seat, and the reciprocating bar is inserted into the cylindrical cam. When the roller is further guided to the spiral track, the tips of the plurality of long arms formed on the second bell crank are in the short direction of the floor seat in conjunction with the rotational movement of the cylindrical cam. A sofa bed characterized in that the tilt angle of the second backrest is changed by rolling contact with an end portion. The sofa bed according to any one of claims 1 to 3,
A third bell crank having a short arm extending in a circumferential direction from the third rotation shaft, and a plurality of long arms bent by the short arm and the third rotation shaft;
A first connecting rod whose one end is rotationally coupled to the extended end of the short arm of the third bell crank and whose other end is rotationally coupled to the tip of the second piston rod provided in the second electric actuator; Has
Advancing and retracting the first connecting rod connected to the second piston rod by advancing and retracting a second piston rod provided in the second electric actuator;
The third rotation shaft of the third bell crank is held in parallel with the opening / closing axis of the first backrest at the position of a pair of bed rails in the vicinity of the opening / closing axis of the first backrest, The short arm of the bell crank rotates the third bell crank in conjunction with the advancement and retraction of the first connecting rod, and the ends of a plurality of long arms formed on the third bell crank are in the longitudinal direction of the floor seat. A sofa bed, wherein the tilt angle of the first backrest is changed by rolling contact with an end portion. The sofa bed according to claim 6,
A clevis-shaped mounting shaft provided at an end of the second electric actuator so as to face the second piston rod;
The first bevel gear has a fourth rotation shaft provided at one end, the fourth rotation shaft is provided with a short arm extending in the circumferential direction, and the extended end of the short arm is the A first crank that is rotationally coupled to the mounting shaft of the two electric actuators;
A second bevel gear that meshes with the first bevel gear has a fifth rotation shaft provided at one end, and the fifth rotation shaft is provided with a plurality of long arms extending in the circumferential direction. And,
The fourth rotating shaft of the first crank is arranged so that the axial direction is orthogonal to the pair of bed rails, and the fifth rotating shaft of the second crank is near the opening / closing shaft of the second backrest. The pair of bed rails are held in parallel with the opening / closing axis of the second backrest, and when the second piston rod moves backward from the most advanced state, the first backrest returns to a flat floor. When a seat is formed and the second piston rod is further retracted, the fifth pivot shaft rotates in conjunction with the rotational movement of the fourth pivot shaft, and a plurality of long arms formed on the second crank. The sofa bed is characterized in that the tip of the rolling contact is brought into rolling contact with the short-side end of the floor seat to change the inclination angle of the second backrest. The sofa bed according to any one of claims 1 to 3,
A sixth arm having a short arm extending in the circumferential direction from the sixth rotation shaft, and a plurality of long arms bent by the short arm and the sixth rotation shaft;
A second connecting rod whose one end is rotationally coupled to the extended end of the short arm of the sixth bell crank and whose other end is rotationally coupled to the tip of the second piston rod provided in the second electric actuator; Has
Advancing and retracting the second piston rod provided in the second electric actuator to advance and retract the second connecting rod connected to the second piston rod;
The sixth pivot shaft of the sixth bell crank is held in parallel with the opening / closing axis of the first backrest at the position of a pair of bed rails in the vicinity of the opening / closing axis of the first backrest, The short arm of the bell crank rotates the sixth bell crank in conjunction with the advance and retreat of the second connecting rod, and the ends of the plurality of long arms formed on the sixth bell crank are in the longitudinal direction of the floor seat. A sofa bed, wherein the tilt angle of the first backrest is changed by rolling contact with an end portion. The sofa bed according to claim 8,
A seventh rotation shaft disposed so that an axial direction thereof is orthogonal to the pair of bed rails, and extends in a circumferential direction from the seventh rotation shaft; A first arm that is rotationally coupled to the mounting shaft, a second arm that extends from the seventh rotation shaft in an outer peripheral direction with a constant opening angle with the first arm, and an extended end of the second arm. A seventh bell crank provided with a cantilever pin that swings about the seventh rotation axis;
The pair of bed rails in the vicinity of the opening / closing axis of the second backrest has an eighth rotating shaft held in parallel with the opening / closing axis of the second backrest. A short arm extending in the circumferential direction, a plurality of long arms extending in the outer circumferential direction from the eighth rotation shaft with a certain opening angle with the short arm, and an extended end portion of the short arm, An eighth bell crank that is provided with both-end support pins that are slidingly coupled to the cantilever pins to rotate the eighth pivot shaft,
When the second piston rod is retracted from the most advanced state, the first backrest is restored to form a flat seat, and when the second piston rod is further retracted, the mounting shaft of the second electric actuator The eighth pivot shaft rotates in conjunction with the rotational movement of the seventh pivot shaft having the first arm to be rotationally coupled, and the ends of a plurality of long arms formed on the eighth pivot shaft are the floor. A sofa bed, wherein the tilt angle of the second backrest is changed by rolling contact with an end portion in a short direction of the seat.

Images