TWI783461B - Auxiliary device - Google Patents

Abstract

The assisting device includes: a body frame; a support member configured to move relative to the body frame at least in an up-and-down direction, and to support the upper body of the person being assisted; a footrest is detachably arranged on the body frame on the upper side of the body frame, and the assisted person places the feet; and a horizontal direction restriction part is provided on at least one of the lower surface of the foot board or the upper side of the body frame, and restricts the foot board relative to the Movement of the body frame in at least the horizontal direction is restricted.

Description

Auxiliary device

This specification relates to an assisting device including a footrest on which a person to be assisted places a foot.

As the aging society progresses, the demand for assistance devices increases. The assisting device generally drives a support member that supports a part of the body of the person being assisted, and assists various actions of the person being assisted. Furthermore, some of the assisting devices are also used for the purpose of boarding and moving by the assisted person. With the introduction of the assistance device, the physical burden on the sponsor and the assisted person is reduced, and the shortage of helpers is also alleviated. A technical example of such an auxiliary device is disclosed in Patent Document 1.

The assistance device of Patent Document 1 includes a base, and a support member that supports the upper body of the person being assisted and moves vertically relative to the base, and assists the person being assisted to stand up. Furthermore, the abutment includes an abutment pole, a footrest (foot resting platform) on which a person to be assisted places a foot, and a plurality of wheels. And, when the assisting person operates the handle attached to the supporting member, the assisting device on which the assisting person rides is moved. prior art literature patent documents

Patent Document 1: International Publication No. 2018/168112

[Problem to be solved by the invention]

However, the assistance device of Patent Document 1 is used for a person being assisted to move to a washroom, a cafeteria, or the like. Therefore, the pedals may become contaminated with excrement, food and drink, and the like. Here, since the footboard is a fixed structure, the helper bends down to perform difficult wiping and cleaning. Furthermore, since the auxiliary device contains power components that are susceptible to moisture, care must be taken when wiping it with water if sufficient waterproof measures are not implemented.

Therefore, the problem to be solved in this specification is to provide an assisting device that can be easily cleaned by simply removing the footboard. [means to solve the problem]

This specification discloses an assistance device, comprising: a body frame; a support member configured to move relative to the body frame at least up and down, and to support the upper body of the person being assisted; a footrest configured in a detachable manner on the upper side of the body frame, and for the assisted person to place his feet; and a horizontal direction restricting part, arranged on at least one of the lower surface of the footrest or the upper side of the body frame, and for the At least horizontal movement of the footboard relative to the body frame is restricted. [Effect of Invention]

In the assisting device disclosed in this manual, the assisting person can easily remove the footboard from the main body frame. Furthermore, helpers and the like can completely wash the removed footboard with water, that is, it can be easily cleaned.

1. Overall structure of the assistance device 1 of the first embodiment Referring to FIG. 1 and FIG. 2 , the overall structure of the assistance device 1 according to the first embodiment will be described. As shown by the upper right arrow in FIG. 1 , the front and rear of the assisting device 1 are determined. The assistance device 1 is used, for example, for a person being assisted to transfer between two different places, such as transferring between a bed and a wheelchair, or transferring between a wheelchair and a toilet seat. The assisting device 1 supports the upper body of the person being assisted, and assists a standing motion from a sitting posture to a standing posture, and a sitting motion from a standing posture to a sitting posture.

Here, the standing posture refers to a posture in which the buttocks are lifted from the seat surface and the legs are extended, including standing postures and slightly bent postures. That is, the standing posture includes a standing posture in which the upper body is substantially upright, a posture in which the upper body is leaning forward and the waist is bent forward, and the like. In addition, when the two parts of the transfer are far away, the assisting device 1 is also used for the person being assisted to board and move. For example, the assisting device 1 is used for a person being assisted to move from a living room to a bathroom, a dining room, or the like. The auxiliary device 1 includes: a main body frame 2, a pedal 3, an arm member 5, a support member 6, an actuator 7, a detachable mounting mechanism 4 corresponding to a horizontal direction restricting part, a positioning part 8, and a control not shown in the figure. Department etc.

The body frame 2 is assembled with an arm member 5 and an actuator 7 . Furthermore, the footboard 3 is detachably attached to the upper side of the main body frame 2 . The body frame 2 includes: a pair of left and right pipe frames 21 , a pair of left and right assembly frames 22 , a pair of left and right front plate frames 23 , and a rear plate frame 24 .

As shown in FIG. 2 , the pipe frame 21 is formed by bending a metal pipe. In detail, the pipe frame 21 has a shape in which the pipe front part 211, the pipe middle part 212, and the pipe rear part 213 are connected. A pair of left and right pipe intermediate portions 212 are located slightly higher than the floor surface F, extend horizontally in the front-rear direction, and are spaced apart from each other and arranged in parallel. The front pipe part 211 is formed by bending the front side of the middle pipe part 212 upward. As shown in FIG. 1 , standing plate-shaped assembly frames 22 are respectively provided on the front sides of the left and right pipe front portions 211 .

On the top of the left and right assembly frames 22, swing support bases 29 are respectively provided. Front wheels 25 are respectively provided below the left and right assembly frames 22 . Position adjustment parts 281 are respectively provided at the upper ends of the left and right pipe front parts 211 . The position adjustment unit 281 is a manual adjustment mechanism, and the assister or the like adjusts the position of the knee contact member 28 in the front-rear direction according to the physique of the assisted person or the like.

The knee contact member 28 is a site where the knee of the assisted person abuts. The position of the knee is fixed by the knee contact member 28, and the stand-up motion or the sitting motion of the assisted person is stabilized. The knee fitting member 28 includes: a bottom plate 282 , a knee fitting body 283 , two support rods 284 and the like. The bottom plate 282 is made of a metal plate, is formed to extend in the left-right direction, and is arranged to be inclined slightly forward from the vertical direction. The knee contact body 283 includes elastically deformable urethane foam or the like, and is attached to the rear side of the bottom plate 282 . The two support rods 284 are formed using metal rods, and connect the bottom plate 282 to the left and right position adjustment parts 281 .

As shown in FIG. 2 , the left and right pipe intermediate portions 212 are connected by a front auxiliary pipe 214 and a rear auxiliary pipe 215 extending in the left and right directions and arranged separately from each other in the front and rear. The front auxiliary pipe 214 and the rear auxiliary pipe 215 are made of the same material as the pipe frame 21 and have the same pipe diameter. Between the front auxiliary pipe 214 and the rear auxiliary pipe 215 , the actuator mount 216 comprising two plates is erected in the front-rear direction. An actuator support member 217 (see FIG. 1 , omitted in FIG. 2 ) is provided on the actuator mount 216 . The actuator supporting member 217 extends upward from the actuator mount 216 .

A pair of left and right tube rear parts 213 are formed by bending the tube middle part 212 relatively inwardly. The bent ends of the left and right tube rear parts 213 are connected by a connecting part 218 . The joint portion between the pipe middle portion 212 and the auxiliary pipe ( 214 , 215 ) and the joint portion 218 between the pipe rear portions 213 are joined by welding, for example.

The left and right pair of front panel frames 23 each include a metal plate-shaped member. The front and rear edges of the front panel frame 23 are bent downward. The front panel frame 23 protrudes outward from the front position of the pipe middle part 212 by welding processing and is fixed. The left and right front panel frames 23 are located outside the front auxiliary pipe 214 . Middle wheels 26 are respectively provided on the outer lower surfaces of the left and right front panel frames 23 . The diameter of the middle wheel 26 is smaller than that of the front wheel 25 .

The rear panel frame 24 includes a metal plate-shaped member long in the left-right direction. The left and right side edges of the rear panel frame 24 are bent downward. The rear plate frame 24 is fixed to the upper side of the tube rear portion 213 by welding. The shape of the rear portion of the rear plate frame 24 has a convex shape protruding rearward on both left and right sides, and a concave shape concaved forward in the center. Rear wheels 27 are respectively provided on the convex lower surface of the rear portion of the rear panel frame 24 . The diameter of the rear wheel 27 is smaller than that of the front wheel 25 .

Front wheel 25, middle wheel 26 and rear wheel 27 have steering function. Therefore, the assisting device 1 is capable of not only moving straight forward and turning, but also moving laterally and turning on the spot. Furthermore, the front wheels 25 include a locking function that restricts the movement of the assistance device 1 .

The footrest 3 is a part where the person to be assisted puts his or her feet on to get on. The detachable mounting mechanism 4 is detachably mounted on the upper side of the main body frame 2 to which the footboard 3 is lowered by applying a downward external force. In addition, the detachable attachment mechanism 4 allows the step board 3 to be detached from the main body frame 2 to ascend when an upward external force is applied thereto. Details of the pedal 3 and the detachable mounting mechanism 4 will be described later.

As shown in FIG. 1 , the arm member 5 is formed in a shape bent halfway when viewed from the side. A pair of left and right swing shafts 51 are provided on the lower part of the arm member 5 . The left and right rocking shafts 51 are respectively rockably supported by the rocking support base 29 of the assembly frame 22 . In order to limit the swing angle range of the arm member 5 , a stopper mechanism (not shown in the figure) is arranged near the swing support base 29 . Thereby, the arm member 5 becomes rockable in the up-front direction and the down-rear direction with respect to the main body frame 2. As shown in FIG. The arm member 5 swings in the forward direction (clockwise swing in FIG. 1 ) during the stand-up movement of the person being assisted. In addition, the arm member 5 swings in the downward and rearward direction during the sitting movement of the assisted person.

Inside the arm member 5, a battery and a link mechanism (not shown in the figure) are accommodated. The battery serves as a power source for the actuator 7 and the control unit. A swing support portion (symbol omitted) is provided on the rear side of the upper portion of the arm member 5 , and a swing member 52 is provided on the swing support portion. The rocking member 52 rocks relative to the arm member 5 . However, in the initial state before the person being assisted is in contact with the support member 6, the swing member 52 is restricted by the link mechanism so as not to swing. In addition, the applicant of the present application disclosed a detailed configuration example of the link mechanism in International Publication No. 2018/167856.

The rocking member 52 includes a bottom plate 53 on the rear side. The bottom plate 53 is formed in a substantially rectangular shape using a metal or resin plate with high rigidity. The bottom plate 53 includes a handle 54 on the front surface. The handle 54 is formed in a substantially square frame shape and extends above the arm member 5 . The handle 54 is held by the person being assisted, and is also held by the person helping to move the assisting device 1 .

The supporting member 6 is provided on the rear side of the bottom plate 53 . The support member 6 includes an upper body support member 61 and a pair of left and right underarm support members 64 . The upper body support member 61 is attached to the rear surface of the bottom plate 53 . The upper body support member 61 is formed by laminating a hard cushioning member 62 and a soft cushioning member 63 . The upper body support member 61 supports the upper body of the assisted person, mainly from the chest to the vicinity of the abdomen.

A pair of left and right underarm support members 64 are attached to the bottom plate 53 and arranged on the left and right sides of the upper body support member 61 . The underarm support member 64 is formed in an L-shape bent at an obtuse angle. The underarm support member 64 includes a core member not shown in the figure, an outer peripheral member, and the like. The underarm support member 64 enters the underarm of the assisted person to support the upper body. The upper body supporting member 61 and the underarm supporting member 64 can also be covered by a protective cover made of cloth or leather.

The actuator 7 is a telescopic linear motion actuator, and includes a main body portion 71 , a movable portion 72 , a motor 73 and the like. The main body part 71 is a cylindrical member with a large diameter elongated up and down, and includes an opening part in the upper part. The lower end of the main body portion 71 is supported by the actuator support member 217 of the main body frame 2 . The movable portion 72 is a vertically long thin-diameter round rod-shaped member. The upper end of the movable portion 72 is connected to the link mechanism of the arm member 5 . The lower part of the movable part 72 fits into the opening part of the main body part 71 .

The motor 73 is attached to the front side of the lower portion of the main body portion 71 . The motor 73 switches the energization direction of the control current by the control part, and drives the extension operation and contraction operation of the movable part 72 . Thereby, the movable part 72 expands and contracts relative to the main body part 71 . The actuator 7 performs a first stretching operation of stretching from the minimum length to a predetermined midway length, and a second stretching motion of stretching from the midway length to the maximum length.

By the first extension operation of the actuator 7, the support member 6 is driven through the link mechanism, and swings in the forward direction. By the second extension movement of the actuator 7, the arm member 5 is driven via the link mechanism, and swings in the forward direction. In this way, the supporting member 6 moves upward relative to the body frame 2 and also moves forward. Thereby, the assisting device 1 assists the stand-up movement of the assisted person. In addition, the support member 6 moves downward and also moves backward by the contraction operation of the actuator 7 . Thereby, the assisting device 1 assists the person being assisted to sit down.

The control unit not shown in the figure includes a manipulator, a control body unit, and the like. The manipulator includes an up button and a down button for operating the actuator 7 . Manipulators are operated by mediators. The control body is a computer device that includes a central processing unit (Central Processing Unit, CPU) and operates with software. The control body part controls the current flowing in the actuator 7 according to the operation information of the up button and the down button. Thereby, the operation and stop of the actuator 7, and the switching between the extension operation and the contraction operation are controlled.

2. Detailed structure of pedal 3 and detachable installation mechanism 4 Next, the detailed structure of the footboard 3 and the detachable mounting mechanism 4 will be described with reference to FIG. 2 and FIG. 3 . As shown in FIG. 2 , the footboard 3 is formed in a plate shape covering the body frame 2 . The material of the footboard 3 can be exemplified by resin, and is not limited thereto. The width dimension in the left-right direction of the footboard 3 is larger at the front side, and gradually decreases toward the rear side.

The peripheral edge of the footboard 3 bends downward to surround the main body frame 2 . The front edge of the footboard 3 has a shape along the front edges of the left and right front panel frames 23 . At the center of the front edge of the footboard 3 in the left-right direction, a groove 31 for passing the actuator support member 217 is provided. The rear edge of the footboard 3 is shaped to follow the rear edge of the rear panel frame 24 . That is, the rear edge of the footboard 3 is formed by connecting convex shapes on the left and right sides and a concave shape in the center. The left and right side edges of the pedal 3 run obliquely from the two ends of the front edge to the two ends of the rear edge.

The upper surface of the footboard 3 is formed as a plane. The lower surface of the footboard 3 is placed on the front frame 23 and the rear frame 24 . On the lower surface of the footboard 3 , there are provided protruding strips 32 intersecting in a grid pattern in a region not in contact with the front frame 23 and the rear frame 24 . The protrusions 32 protrude downward and are in contact with the pipe frame 21 and the rear auxiliary pipe 215 . The protrusions 32 not only improve the mechanical rigidity of the footboard 3 but also disperse the load acting on the main body frame 2 from the footboard 3 . Thereby, deformation such as warping of the footboard 3 is suppressed.

In addition, the footrest 3 of many types which differs in at least one of a shape and a size can also be made replaceable. For example, the concave shape at the center of the rear edge of the footboard 3 corresponds to the outer shape of the toilet. In other words, the concave shape is used to make the assisting device 1 close to the toilet, so that the person being assisted can easily transfer to the toilet. Therefore, for purposes other than moving to the washroom, the footboard 3 having a large area without a concave shape can be used. Thereby, the worry that the assisted person's foot steps off the footrest 3 is reduced. In addition, for a person with a large body or a person with particularly large feet, a footrest 3 larger than the standard product can be used.

The detachable installation mechanism 4 includes: installation parts (41, 42), which constitute a part of the body frame 2; Snap to the installation part (41, 42). In this embodiment, two sets of mounting portions ( 41 , 42 ) and engaging portions ( 43 , 44 ) are provided on the front side and two sets are provided on the rear side, for a total of 4 sets. In addition, the installation parts ( 41 , 42 ) do not constitute a part of the body frame 2 , and may also be dedicated components additionally provided on the body frame 2 . Hereinafter, the mounting parts (41, 42) and the engaging parts (43, 44) will be described in detail.

The pair of left and right front mounting parts 41 are determined as portions near both ends of the front auxiliary pipe 214 . The pair of left and right rear mounting portions 42 are determined as portions near the rear ends of the left and right pipe intermediate portions 212 . The front mounting portion 41 and the rear mounting portion 42 correspond to a gripped portion formed in a cylindrical shape.

A pair of left and right front engaging portions 43 are respectively provided at positions facing the front mounting portion 41 on the lower surface of the footboard 3 . A pair of left and right rear engaging portions 44 are respectively provided at positions facing the rear mounting portion 42 on the lower surface of the footboard 3 . The front engaging portion 43 and the rear engaging portion 44 are integrally formed with the footboard 3 , or formed separately and added. The front engaging portion 43 and the rear engaging portion 44 correspond to a gripping portion for gripping the gripped portion.

As shown in FIG. 3 , the rear engaging portion 44 includes: a pair of left and right gripping claws 45 extending downward and facing each other, and a gripping space 46 passed between the gripping claws 45 and defined on the upper side. The distance between the pair of holding claws 45 is slightly smaller than the pipe diameter of the pipe frame 21 . The holding space 46 is a circular space, and its inner diameter is the same as or slightly larger than the pipe diameter of the pipe frame 21 .

Therefore, when the footboard 3 is mounted, the pair of gripping claws 45 are elastically deformed so that the distance between them expands to match the diameter of the pipe while the rear engaging portion 44 is lowered and the rear mounting portion 42 is gripped. . In addition, in the mounted state where the rear engaging portion 44 grips the rear mounting portion 42 in the grip space 46 , the pair of gripping claws 45 returns to an elastic recovery state having been elastically deformed. Furthermore, in the mounted state, the rear engaging portion 44 not only restricts the movement of the rear mounting portion 42 in the left-right direction, but also allows movement in the front-rear direction. Thereby, the position of the foot board 3 with respect to the main body frame 2 in the left-right direction is determined, and movement in the front-back direction is allowed.

On the other hand, the front engaging portion 43 and the rear engaging portion 44 have the same shape, and instead of a left and right pair, they include a front and rear pair of grasping claws 45 . That is, the orientation of the front engaging portion 43 is 90° different from that of the rear engaging portion 44 . Therefore, the front engaging part 43 not only allows the movement of the front mounting part 41 in the left-right direction, but also restricts the movement in the front-rear direction. Thereby, the movement of the foot board 3 in the left-right direction with respect to the main body frame 2 is allowed, and the position in the front-back direction is determined.

As described above, the plurality of engaging portions ( 43 , 44 ) include engaging portions having different restricting directions for restricting movement of the gripped mounting portion ( 41 , 42 ). Thereby, the horizontal movement of the foot board 3 with respect to the main body frame 2 is restricted. That is, the detachable mounting mechanism 4 is provided on at least one of the lower surface of the footboard 3 or the upper side of the body frame 2, and becomes a horizontal direction that restricts movement of the footboard 3 relative to the body frame 2 in at least the horizontal direction. A form of the restriction part.

In this first embodiment, as shown in FIGS. 2 and 3 , a pair of left and right positioning portions 8 are further provided as horizontal direction regulation. In detail, positioning bosses 81 are respectively provided on the left and right sides of the rear portion of the lower surface of the footboard 3 . On the other hand, positioning holes 82 are respectively provided at positions facing the positioning bosses 81 of the rear plate frame 24 . When the footboard 3 is mounted on the body frame 2, the positioning boss 81 fits into the positioning hole 82 to restrict the movement of the footboard 3 in the horizontal direction.

The positioning portion 8 is not essential, but has a function of suppressing damage to the grip claw 45 and facilitating the attachment operation of the footboard 3 . Furthermore, assuming that the front mounting portion 41 is positioned near the front end of the pipe intermediate portion 212 , the front engaging portion 43 is oriented in the same direction as the rear engaging portion 44 . In this case, the movement of the foot board 3 relative to the body frame 2 in the front-rear direction is no longer restricted. Therefore, the positioning unit 8 becomes necessary.

3. Disassembly operation and function of pedal 3 Next, comparing with the prior art, the dismounting operation and function of the pedal 3 will be described. In the installation operation of the footboard 3 , the helper or the like first brings the footboard 3 in from the upper side of the body frame 2 . Next, an assistant or the like aligns the positioning portion 8 and applies a downward external force to the footrest 3 . The magnitude of the applied external force needs to be greater than the force required for the elastic deformation of the grip claws 45 of the front engaging portion 43 and the rear engaging portion 44 to expand to the pipe diameter. Thereby, the front engaging part 43 engages (holds) with the front mounting part 41 while descending, and the rear engaging part 44 engages (holds) with the rear mounting part 42 while descending. Thus, the installation operation of the footboard 3 ends.

In addition, during the removal operation of the footboard 3 , an assistant or the like applies an upward external force to the footboard 3 . The magnitude of the external force to be applied needs to be greater than or equal to a value obtained by adding the force required for the elastic deformation of the grip claw 45 to the own weight of the footboard 3 . Thereby, the front engaging part 43 is detached from the front mounting part 41 while rising, and the rear engaging part 44 is detached from the rear mounting part 42 while rising. Thereby, the removal operation of the footboard 3 is completed. In this way, the footboard 3 can be easily attached and detached without requiring tools for detachment.

On the other hand, the conventional intermediary device 9 shown in FIG. 4 does not include the detachable mounting mechanism 4 but includes a fixing portion 8X instead of the positioning portion 8 . The fixing portion 8X includes a bolt provided downward on the lower surface of the footboard 3 , a through hole formed in the rear frame 24 , and a fixing nut screwed to the tip of the bolt passing through the through hole. Usually, the attachment and detachment operation of the fixing part 8X is difficult for users such as an assistant, or is not allowed from the viewpoint of performance assurance.

Therefore, when the footboard 3 is soiled with excrement, food and drink, etc., the helper or the like bends down and performs difficult wiping and cleaning. Furthermore, since the auxiliary device 1 contains power components such as the actuator 7 and the control part that are susceptible to moisture, care must be taken when wiping and cleaning with water. On the other hand, in the assistance device 1 of the first embodiment, the footrest 3 can be removed for cleaning. Therefore, it is not difficult to bend down to clean, but it may be easy to clean the footboard 3 completely, and there is no need to consider electric components. In addition, the detachable mounting mechanism 4 is provided on the lower surface side of the footboard 3 , and there are no protrusions or the like on the upper surface of the footboard 3 . Therefore, even if the assisted person rides with bare feet, he will not feel pain, and there is no worry of injury.

In addition, if the conventional assisting device 9 is placed on the footboard 3 by mistake and lifted up during transportation, etc., the fixing part 8X may be damaged or the footboard 3 may be cracked. On the other hand, in the assisting device 1 of the first embodiment, even if the footrest 3 is lifted by hand, the footrest 3 will not be damaged if the footrest 3 is removed. Furthermore, since the assembling work of the fixing part 8X is unnecessary, the man-hours of work at the time of manufacture and repair of the intermediary device 1 of 1st Embodiment are reduced.

In the assisting device 1 of the first embodiment, the assisting person or the like can easily remove the footrest 3 from the main body frame 2 . Furthermore, the helper and the like can completely wash the removed footboard 3 with water, that is, can easily clean it.

4. Detachable mounting mechanism 4A of the second embodiment Next, a detachable mounting mechanism 4A according to a second embodiment will be described with reference to FIG. 5 . In the second embodiment, the structure of the intermediary device 1 other than the detachable attachment mechanism 4A is the same as that of the embodiment. As shown in FIG. 5 , the detachable mounting mechanism 4A includes a mounting hole 4B provided in the pipe middle portion 212 and a mounting pin 4C provided in the lower surface of the footboard 3 . The mounting pin 4C is detachably fitted into the mounting hole 4B. Although omitted in FIG. 5 , multiple sets of mounting holes 4B and mounting pins 4C are provided.

The attachment hole 4B is formed by perforating the upper portion of the cylindrical pipe intermediate portion 212 . In addition, the mounting hole 4B may also be formed in the front frame 23 or the rear frame 24 , or the auxiliary pipe ( 214 , 215 ). The mounting pin 4C is made of elastic material such as synthetic rubber. The mounting pin 4C is formed by sequentially connecting a root portion 4D, a constricted portion 4E, and a front end portion 4F from the upper side. The root portion 4D has a large diameter and is bonded to the lower surface of the pedal 3 . The constricted portion 4E is formed to have the same diameter as the attachment hole 4B or slightly smaller. The front end portion 4F includes a portion slightly thicker than the diameter of the mounting hole 4B.

Therefore, when the footboard 3 is attached, the attaching pin 4C descends and fits into the attaching hole 4B, and the front end portion 4F is compressed until its diameter matches the diameter of the attaching hole 4B, thereby elastically deforming. In addition, in the mounted state where the constricted portion 4E has reached the mounting hole 4B, the front end portion 4F returns to an elastic recovery state having undergone elastic deformation. Furthermore, in the mounted state, the mounting pin 4C restricts movement in the front-rear direction and the left-right direction of the mounting hole 4B. Thereby, the footboard 3 is positioned relative to the body frame 2 . Therefore, the positioning part 8 is unnecessary.

In addition, in the removal operation of the footboard 3 , an assistant or the like may apply an upward external force obtained by adding the force required for the elastic deformation of the front end portion 4F to the weight of the footboard 3 . Therefore, tools for disassembly and assembly are not required. Although detailed description is omitted, in the detachable mounting mechanism 4A of the second embodiment, the same operations and effects as those of the detachable mounting mechanism 4 of the first embodiment are produced.

5. Horizontal direction restricting part of the third embodiment Next, regarding the horizontal direction restricting portion of the third embodiment, differences from the first and second embodiments will be mainly described with reference to FIG. 6 . The horizontal direction restricting portions of the first and second embodiments are configured by combining the detachable mounting mechanism ( 4 , 4A) and the positioning portion 8 . On the other hand, the horizontal direction regulating part of the third embodiment includes a pair of left and right positioning parts 8 on the rear side and the front side (four positions in total), and the detachable mounting mechanism ( 4 , 4A) is omitted.

As shown in FIG. 6 , a pair of left and right positioning portions 8 on the rear side are arranged at the same positions as in the first embodiment, that is, on the left and right sides of the rear plate frame 24 . On the other hand, a pair of left and right positioning parts 8 on the front side are respectively disposed on the left and right front plate frames 23 . In the third embodiment, the elastic deformation of the grip claw 45 (first embodiment) or the elastic deformation of the front end portion 4F (second embodiment) is unnecessary when attaching or detaching the footboard 3 . Therefore, an assistant or the like can attach the footboard 3 only by placing it on the main body frame 2, and can remove it with a little force. Furthermore, the manufacturing cost can be reduced corresponding to the detachable mounting mechanism ( 4 , 4A).

6. Variations and applications of the implementation In addition, the pipe frame 21 and the auxiliary pipes ( 214 , 215 ) may also be replaced with solid rods. In addition, the front engaging portion 43 and the rear engaging portion 44 hold the front mounting portion 41 and the rear mounting portion 42 in an elastically restored state in the embodiment, but can be deformed to hold in an elastically deformed state. Furthermore, the detachable mounting mechanism (4, 4A) may also be replaced by a mechanism that can detachably engage hooks formed in a crank shape, a mechanism that manually operates the buckle, or a magnetic mechanism using a magnet. suction mechanism etc. In addition to this, various modifications and applications are possible in this embodiment.

1: Auxiliary device 2: Body frame 21: Tube frame 211: Tube front 212: the middle part of the pipe 213: Tube Rear 214: Front side auxiliary pipe 215: rear auxiliary pipe 216: Actuator mount 217: Actuator support material 218: junction 22: Assemble the frame 23: Front panel frame 24: Rear panel frame 25: front wheel 26: middle wheel 27: rear wheel 28: Knee close to member 281: Position adjustment department 282: Bottom plate 283: The knee is close to the body 284: support rod 29: Shake the support seat 3: Pedal 31: Slot 32: protruding part 4: Detachable installation mechanism 41: Front mounting part 42: Rear mounting part 43:Front locking part 44: Rear locking part 45: Holding claw 46: Holding Space 4A: Another form of detachable installation mechanism 4B: Mounting hole 4C: Mounting Pin 4D: Root 4E: Contraction 4F: front end 5: Arm member 51: shake shaft 52: shake components 53: Bottom plate 54: handle 6: Support member 61:Upper body support member 62: Hard buffer member 63: soft cushioning member 64:Axillary support member 7: Actuator 71: Body Department 72: Movable part 73: motor 8: Positioning Department 81: Positioning boss 82: positioning hole 8X: fixed part 9: the intermediary device of prior art F: floor surface

FIG. 1 is a side view showing the overall structure of a mediation device according to a first embodiment. Fig. 2 is a perspective view of the main body frame and the footrest of the auxiliary device viewed from the floor side. FIG. 3 is a partially enlarged view of FIG. 2 and is a perspective view illustrating a detachable mounting mechanism and a positioning unit. Fig. 4 is a perspective view of a conventional assisting device viewed from the floor side. Fig. 5 is a cross-sectional view schematically showing a detachable mounting mechanism according to a second embodiment. FIG. 6 is a perspective view illustrating a horizontal direction restricting portion of a third embodiment.

2: Body frame

212: the middle part of the pipe

213: Tube Rear

24: Rear panel frame

27: rear wheel

3: Pedal

32: protruding part

4: Detachable installation mechanism

42: Rear mounting part

44: Rear locking part

45: Holding claw

46: Holding Space

8: Positioning Department

81: Positioning boss

82: positioning hole

Claims (8)

An assisting device, comprising: a body frame; a support member configured to move relative to the body frame at least in an up-and-down direction, and to support the upper body of a person being assisted; The upper side of the body frame, and for the assisted person to place the feet; the horizontal direction restricting part is arranged on at least one of the lower surface of the foot board or the upper side of the body frame, and is opposite to the foot board Movement in at least the horizontal direction of the body frame is restricted; and a detachable mounting mechanism detachably attaches the footboard to the footboard by applying an external force to the footboard. The body frame, wherein the detachable mounting mechanism includes: a mounting portion provided on the body frame, or a mounting portion constituting a part of the body frame; and an engaging portion provided on the lower surface of the pedal , and is detachably engaged with the mounting portion, wherein the engaging portion is engaged with the mounting portion while descending due to the downward external force applied to the pedal. The assisting device according to claim 1, wherein the mounting portion is a gripped portion formed in one of a rod shape, a cylindrical shape, and a convex shape, and The engaging portion is a holding portion for holding the held portion. The assisting device according to claim 2, comprising a plurality of gripping parts, and the plurality of gripping parts include gripping parts with different restriction directions for restricting the movement of the gripped part that is gripped. . The assisting device according to claim 1, wherein the mounting part is provided in a mounting hole or a mounting groove of the body frame, and the engaging part is provided on the lower surface of the pedal and embedded in the Mounting holes or mounting pins for said mounting slots. The assisting device according to any one of claim 1 to claim 4, wherein the engaging portion is engaged with the pedal in an elastic recovery state after elastic deformation by the external force applied to the pedal. The mounting portion is engaged with the mounting portion in an elastically deformed state. The assisting device according to claim 1, wherein the engaging portion is released from the mounting portion while rising due to the upward external force applied to the pedal. The assisting device according to any one of claim 1 to claim 4, further comprising a positioning part for determining the position of the pedal relative to the body frame. The assisting device according to any one of claims 1 to 4, wherein the plurality of types of footrests having at least one of different shapes and sizes can be replaced.

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