JP2000037418A - Wheelchair locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair locking device capable of securely locking a wheelchair in place. SOLUTION: This wheelchair locking device is provided with a support member 31 supporting a lead screw 30 and a motor 32 on the right actuation base 27 of a guide rail 25, and a driven nut 33 screwedly engaged with the lead screw 30 on the left actuation base 26 of the guide rail 25. Right and left guide arms 44, 45 are rotatably supported against right and left locking blocks 42, 43, and right and left hooks 48, 49 are rotatably supported against the guide arms 44, 45. Right and left actuation transmitting arms 50, 51 supported against the brackets 28, 29 of the right and left actuation bases 26, 27 are connected to the rear ends of the hooks 48, 49. Right and left push bars 35, 36 made to abut against the lower ends of the right and left guide arms 44, 45 when the right and left actuation bases 27, 26 are displaced in a mutually approaching direction are extended from the right and left actuation bases 27, 26. The hooks 48, 49 are made to abut against the actuation transmitting bases 50, 51 to regulate the rotation of the hooks 28, 49 in their tilting directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair fixing device for hanging and fixing a wheelchair frame disposed on an apparatus body.

[0002]

2. Description of the Related Art Conventionally, when a wheelchair user moves far, a vehicle 201 such as a microbus or a one-box car as shown in FIG.
No. 1620). The vehicle 201 has an occupant room 202 at the rear, and a plurality of wheelchair fixing devices for fixing a wheelchair 204 are provided on a floor 203 of the occupant room 202.

As shown in FIG. 15, the wheelchair 204 has a frame 205 in which a pipe material is formed in a rectangular shape.
And a sheet material 206 obtained by cross-linking the frame 205 from side to side.
Chair body 207 formed by
A footrest portion 208 extending further forward and the chair body 2
07 is provided with a free wheel 209 and a driving wheel 210 provided at the front and rear portions of the front part of the vehicle.
11 and a side band 21 crossed over the drive wheel 210
2 is provided. One end of each of the belts 211 and 212 is fixed to the floor 203, and the other end is provided with a buckle 214 which is locked by a mounting portion 213 provided on the floor 203.

[0004]

However, in the above wheelchair fixing device, the wheelchair 204 is mounted on the floor 20.
When fixing the belts 211 and 212 to each other, the belts 211 and 212 are crossed over the footrests 208 or the drive wheels 210, and the buckles 214 provided at the ends thereof are fixed to the mounting portions 213 provided on the floor 203. Have to do
The fixing work was troublesome, and the burden on the caregiver was heavy.

In order to solve this problem, a device for fixing the wheelchair 204 by driving a motor has been devised. However, the wheelchair 204 must be accurately positioned at a predetermined fixed position. there were. further,
It is necessary to change a part of the device in accordance with the size of the wheelchair 204 and the difference depending on the manufacturer, which increases the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has as its object to provide a wheelchair fixing device capable of securely fixing a wheelchair without changing the device. Is what you do.

[0007]

According to a first aspect of the present invention, there is provided a wheelchair fixing device provided with a device main body fixed to a floor and a casing of the device main body. A fixed block, a guide arm rotatably supported by the fixed block, a hook rotatably supported at an upper end of the guide arm, and having a hook-shaped hook at one free end; Connect the other free end of the hook
An operation transmission arm rotatably supported at a distal end portion, an operation base rotatably supporting a base end portion of the operation transmission arm, and the operation base along the left-right direction of a casing of the apparatus main body. A moving means for moving in a direction approaching and away from the fixed block, a push bar extending from the operation base and pressing a lower end of the guide arm when the operation base is moved in the approach direction; When the moving base is moved by the moving means in the separating direction, the hook is rotated in the rising direction via the operation transmitting arm, and the hook is positioned on the apparatus main body. The contact state in which the wheel is in contact with the frame of the wheelchair and the rotation of the hook are prevented by the contact, and the rotation of the guide arm supporting the hook in the falling direction is prevented. Is started, while the hook slides on the frame, a downward movement state in which the hook is moved downward, and with the downward movement of the hook, the hook portion of the hook is hooked on the frame, and And a downwardly biased state in which the hook is downwardly biased via the operation transmission arm when the operation base is moved in the approaching direction by the moving means. The push bar extended from the operation base pushes the lower end of the guide arm to rotate the upper end of the guide arm downward, and the operation transmission arm and the operation transmission An inclination restricting contact portion is provided which is in contact with the hook rotated by the arm and restricts rotation of the hook in the falling direction.

That is, when the wheelchair is fixed by the wheelchair fixing device, the operating base is moved in the direction away from the moving base by the moving means, and the hook maintained in the state of being laid down on the casing of the device main body is moved to the wheelchair. Rotate until it comes into contact with the frame. Then, further rotation of the hook is prevented by contact with the frame, and rotation of the guide arm supporting the hook is started. At this time, the hook abutting on the frame is moved downward while sliding on the frame, and is eventually hooked on the frame and urged downward.
Thus, the wheelchair positioned on the apparatus main body is urged in a state where the frame is hooked by the apparatus main body fixed to the floor by the hook. Therefore, the frame of the wheelchair within the rotation locus of the hook-shaped hook portion can be hooked, and even if there are various frames of the wheelchair, one device can cope with it.

[0009] On the other hand, when storing the hook hooked on the frame of the wheelchair, the operating base is moved in the approaching direction by the moving means, and the hook is moved in the direction of falling down via the operation transmitting arm. Rotate. At this time, the guide arm supporting the hook at the tip portion is
The lower end is pressed by a push bar extending from the operation base, and the upper end supporting the hook is rotated downward, so that the support point of the hook set at the upper end is moved downward. You. In addition, the operation transmission arm and the hook that is rotated by the operation transmission arm are provided with a tilt-restriction contact portion that is in contact with each other,
When the operation transmission arm and the hook come into contact with each other at the tilt restricting contact portion, the rotation of the hook in the falling direction is restricted.

In the wheelchair fixing device of the second aspect, an imaginary line connecting a rotation axis of the hook with respect to the guide arm and a rotation axis of the operation transmission arm with respect to the operation base is assumed. On one side of the imaginary line as a boundary, while setting the movement area of the pivot point of the hook with respect to the operation transmission arm, when forming the downward biased state, The restricting structure for restricting the movement of the pivot point is constituted by a movement restricting contact portion which is set on the operation transmission arm and the hook and which comes into contact with each other.

That is, on one side of an imaginary line connecting the rotation axis of the hook with respect to the guide arm and the rotation axis of the operation transmission arm with respect to the operation base,
While the movement area of the rotation point of the hook with respect to the operation transmission arm is set, when the wheelchair frame is hooked and urged downward, the operation transmission arm and the hook are moved in The contact at the contact portion restricts the movement of the pivot point of the hook with respect to the operation transmission arm to the other side beyond the virtual line.

According to a third aspect of the present invention, there is provided a wheelchair fixing device, a device main body fixed to a floor, a guide rail extending along a lateral direction in a casing of the device main body, A pair of left and right fixed blocks provided at the left and right portions, a left and right guide arm rotatably supported by each fixed block, and a rotatably supported upper end of each guide arm, Left and right hooks each having a hook-shaped hook portion at a free end thereof, a left and right operation transmission arm for rotatably supporting the other free end of each hook at the tip, and a base for each operation transmission arm. Left and right operation bases which are rotatably supported at respective ends and are respectively movably provided along the guide rails, and are provided on one of the two operation bases and extend to the other operation base side. A support member rotatably supporting the lead screw, rotating means for rotating the lead screw supported by the support member, and the other operation base, provided on the other operation base, and screwed into the lead screw to form the lead screw. Along with the rotation of the screw, a screwing member that moves the left and right operation bases in the approaching direction and the separation direction that is close to each other, and extends from each of the left and right operation bases, and both operation bases are moved in the separation direction The left and right push arms respectively press the lower end portions of the left and right guide arms, when the lead screw is rotated to move the left and right operation base in the approach direction, the left operation transmission arm The left hook pivoted in the upright direction is brought into contact with a left frame component of a wheelchair positioned on the device body. From the time when the rotation is stopped, the left guide arm supporting the left hook is rotated in a direction to fall down, the left hook is moved downward while sliding on the left frame member, and the left hook is A left frame fixing process in which the movement of the left operation base is stopped in a state of being hung on the left frame component member and being urged downward, and the right hook rotated in a rising direction by the right operation transmission arm Abuts on a right frame component of a wheelchair positioned on the apparatus main body, and from a point in time when its rotation is prevented, the right guide arm supporting the right hook is turned in a direction of falling, and the right hook is Is moved downward while sliding on the right frame component,
A right frame fixing process in which the right hook is hooked on the right frame component member and the movement of the right operation base is stopped in a state of being urged downward, and the left frame is formed. Even if one of the fixed process and the right frame fixed process is completed in advance, the other process is continued, while the lead screw is rotated to move the left-right operating base in the separating direction. Then, each of the left and right hooks is turned in a direction to fall inward via the left and right operation transmission arm, and the lower end portions of the left and right guide arms are moved by the left and right push bars extending from the left and right operation base. Pressing to rotate the upper ends of both guide arms downward, and the left and right operation transmission arms, and the left and right To a click, it sets the tilting restriction abutting portion for restricting the rotation in the direction falling of each of the hook abut each other.

That is, when the wheelchair is fixed by the wheelchair fixing device, the rotating means is operated to rotate the lead screw, and the left and right operation bases are moved in the approaching direction close to each other. Then, the left and right hooks are respectively turned in the rising direction via the left and right operation transmitting arms supported by the left and right operation bases. At this time, if one of the left and right hooks, the left hook precedes, is brought into contact with the left frame component of the wheelchair positioned on the apparatus body, and its rotation is prevented, From this point on, the left guide arm supporting the left hook is turned in the direction of falling, and the left hook is moved downward while sliding on the left frame component. Then, with the downward movement of the left hook, the left hook locks the left frame component and is urged downward. As a result, the wheelchair positioned on the apparatus main body is hung in a state where the left frame constituting member forming the frame is urged downward by the left hook to the apparatus main body fixed to the floor.

At this time, the left operation base for operating the left hook is stopped, but the movement of the right operation base for operating the right hook is continued, and the operation of the right hook is continued. While the right hook is rotated until it comes into contact with the right frame component of the wheelchair positioned on the apparatus main body, the right hook is moved downward while sliding on the right frame component. It is urged downward while being hooked by the right hook.
Thus, even when the center of the wheelchair positioned and arranged on the apparatus main body is shifted from the center position of the apparatus main body, the left and right frame components forming the frame of the wheelchair are shifted from the center position. The left and right hooks can be reliably hooked to the left and right frame components.

On the other hand, when storing the left and right hooks on which the left and right frame members of the wheelchair are hooked, the rotating means is operated to rotate the lead screw to move the left and right operating bases in the separating direction for separating from each other. Each of the left and right hooks is turned by the left and right operation transmission arms in a direction of falling inward. At this time, each of the left and right guide arms supporting the left and right hooks at the distal end is pressed by a left and right push bar extending from the left and right operation base, respectively, and the upper end supporting the left and right hooks is downward. , The support points of the left and right hooks set at the upper end of each guide arm are moved downward.

The left and right operation transmitting arms and the left and right hooks rotated by the respective operation transmitting arms are provided with tilt-restricting contact portions that contact each other. At the time when the hooks abut on the tilt-restricting contact section, the rotation of each hook in the falling direction is restricted.

Furthermore, in the wheelchair fixing device according to the fourth aspect, a left and right virtual axis connecting a rotation axis of each hook to each of the guide arms and a rotation axis of each operation transmission arm to each of the operation bases. While assuming a line, on one side of each virtual line as a boundary, a moving area of a pivot point of each hook with respect to each of the operation transmitting arms is set, while each hook moves a corresponding frame component member downward. When forming a downwardly biased state biased toward the respective imaginary lines, a regulating structure for regulating the movement of each pivot point to the other side in each virtual line is set in each of the operation transmission arms and each of the hooks. It consisted of the movement restriction contact parts that contact each other.

That is, the right and left hooks with respect to the left and right guide arms and the left and right virtual lines connecting the rotation axis of the left and right operation transmitting arm with respect to the left and right operation base are bounded on one side by the left and right. While the movement area of the rotation point of the left and right hooks with respect to the operation transmission arm is set, when the left and right frame components of the wheelchair are hung and urged downward, the left and right operation transmission arms and the respective hooks Abut on the movement restricting contact portion, the movement of the pivot point of each hook relative to each operation transmission arm to the other side beyond each virtual line is regulated.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a wheelchair fixing device 1 of the present invention.
Is mounted on the floor 2 of a vehicle or the floor 2 of a lift used when a wheelchair is accommodated in a vehicle.

The wheelchair fixing device 1 comprises the floor 2
Main body 5 housed in floor 2 through an opening formed in a vehicle, and hooking mechanism 6 for fixing a wheelchair frame
As shown in FIGS. 3 to 5, the apparatus main body 5 includes a casing 7 having an open upper surface for accommodating the hooking mechanism 6, and a wheel closing an upper opening of the casing 7. The positioning cover 8 is provided. As shown in FIG. 6, left and right driving wheels 10 of a wheelchair 9 are provided on left and right portions of the cover 8 with wheel positioning.
Left and right wheel mounting portions 12 and 13 are formed as arc-shaped concave portions in which 11 is accommodated. This left and right wheel mounting part 1
The wheelchairs 2 and 13 have a width dimension (left-right direction) capable of accommodating the size of the wheelchair 9, that is, the wheelchair 9 from the large to small space between the left and right drive wheels 10 and 11. The left and right driving wheels 10 and 11 are formed in arc-shaped concave portions having a diameter capable of accommodating large ones. This allows
In addition to restricting the front and rear movement of both drive wheels 10 and 11,
The front and rear positions of the wheelchair 9 with respect to the apparatus main body 5 can be positioned. Further, a hook arm projecting / retracting slit 14 extending in the left-right direction is formed in the front of the center of the cover 8 with the wheel positioning.

As shown in FIGS. 5 and 6, the hooking mechanism 6 includes a hook mechanism 22 for hooking the frame 21 of the wheelchair 9 positioned on the apparatus main body 5, and a hook mechanism 22. And a guide rail 2 extending along the left-right direction on the bottom surface 24 of the casing 7 as shown in FIGS.
5, a left and right operating base 26 having a ball bearing slidably provided on the guide rail 25,
27, right and left brackets 28 and 29 screwed to both operation bases 26 and 27, respectively, and a support member 31 provided on the right bracket 29 and rotatably supporting a lead screw 30 extending toward the left bracket 28. A motor 32 as rotating means for rotating the lead screw 30 supported by the support member 31;
8 and is screwed into the lead screw 30 to rotate the left and right operation bases 26 and 27 in the approaching direction to approach each other and in the separating direction to separate with the rotation of the lead screw 30. Blocks 42 and 43
, And directions approaching the left and right fixed blocks 42 and 43. ) And a driven nut 33 as a screwing member.

The left operating base 25 is provided with a left push bar 35 protruding leftward via the left bracket 28, and the right operating base 27 is provided with a right push bar protruding rightward. 36 is the right bracket 29
Is provided via When the left and right operation bases 26 and 27 are moved in the separating direction, the left and right slide stoppers 37 and
38, and the two operating bases 2
The configuration is such that the movement of the guide rails 6 and 27 in the separating direction is restricted, and accidental removal from the guide rail 25 is prevented.

The latch mechanism 22 is a left and right fixed block comprising a pair of standing pieces 41, 41 standing on the left and right sides of the guide rail 25 and on the front side of the casing 7. 42, 43 and each fixed block 4
Left and right guide arms 44 and 45 rotatably supported by the first and second guides 2 and 43, and right and left springs 46 biasing the respective guide arms 44 and 45 in the directions in which they stand up (only the right spring 46 is shown in FIG. 5). And left and right hooks 48 and 49 rotatably supported on the upper ends of the guide arms 44 and 45, respectively, and the other free ends of the hooks 48 and 49 are rotatable at the tips. , And each of the base ends is connected to the left and right brackets 2.
Left and right operation transmitting arm 5 rotatably supported by 8, 29
0, 51. The left and right hooks 4
8 and 49 respectively correspond to the respective guide arms 44 and 45.
And left and right hook arms 52 and 53 supported by the hook arms 52 and 53, and hook bars 56 and 57 each having a base end screwed to a distal end of the left and right hook arms 52 and 53 and having hook portions 54 and 55 formed at the distal ends. The hook bars 56, 57 from the left and right hook arms 52, 53 are provided.
Is configured to be adjustable.

The left and right hooks 48 and 49 are shown in FIGS.
As shown in the left hook 48 (only the left hook 48 is shown), the left and right hooks 48, 4 are rotatably supported at a first turning point a set at the tip of the left and right guide arms 44, 45.
Numeral 9 is rotatably supported by the left and right operation transmitting arms 50 and 51 at a second pivot point b set at the lower end thereof. The left and right operation transmission arms 50 and 51 are rotatably supported by the left and right brackets 28 and 29 at a third rotation point c set at the base end thereof. Reference numeral 45 is pivotally supported by the left and right fixed blocks 42 and 43 at a fourth rotation point d set at the base end. The first turning point a and the third turning point c
Assuming a virtual line L connecting the virtual line L and the virtual line L, a moving area of the second rotation point b is set below the virtual line L as a boundary.

As shown in FIG. 10 (only the left hook arm 52 is shown), the left and right operation transmitting arms 50, 51 are inserted into the base ends of the left and right hooks 48, 49 at the left and right hook arms 52, 53. Grooves 61, 61 are formed, and first flat surfaces 62, 62, which are one movement restricting contact part, are formed at the ends of the grooves 61, 61. A second flat surface 6 as the other movement restricting contact portion is also provided at the distal ends of the left and right operation transmitting arms 50 and 51.
3, 63 are formed, and the second flat surfaces 63, 6 are formed.
As shown in FIG. 11, the third flat surface 62 and the first flat surface 62 restrict the upward movement of the second pivot point b beyond the imaginary line L by abutting each other. Constitute a regulatory structure. The left and right hook arms 5
The corners of the first flat surfaces 62, 62 formed in the groove portions 61, 61 of FIG.
As shown in FIG. 2), both hooks 48 and 49 are configured to abut on the upper surface of the left and right operation transmission arms 50 and 51 in a state of being stored in the casing 7. The first and second arms contact the upper surfaces of the arms 50 and 51 and the corners of the first flat surfaces 62 and 62 to restrict the hooks 48 and 49 from rotating more than necessary in the falling direction. Tilt regulation contact portions 65, 65, 6
6, 66 are set.

The wheelchair fixing device 1 is shown in FIG.
As shown in the figure, the fixed switch 71 and the storage switch 72
And a control box 7 provided below the control panel 73.
The control device provided in the control box 74 causes the motor 32 of the hooking mechanism 6 to rotate forward or reverse when the fixed switch 71 or the storage switch 72 is operated. Is configured.

That is, when the fixed switch 71 is operated, the lead screw 30 is rotated by the motor 32 to move the left and right operating bases 26 and 27 in the approaching direction (the left and right fixed blocks 42 and 43). And the left hook 48 is turned in the upright direction via the left operation transmitting arm 50,
The left hook 48 is connected to the left frame component 75 of the frame 21 of the wheelchair 9 positioned on the apparatus main body 5.
And the rotation of the left hook 48 is prevented by the contact, the left guide arm 44 supporting the left hook 48 is rotated in the direction of falling, and the left hook 48 is The left movement base 26 is moved downward while being slid by the left frame component 75, and the left operation base 26 is held in a state where the left hook 48 is hooked on the left frame component 75 and urged downward. The left frame fixed stroke including the downwardly biased state in which the movement is stopped can be formed. Further, the left and right operation bases 26, 27
With the movement in the approach direction, the right hook 49 is rotated in the upright direction via the right operation transmission arm 51,
The right hook 49 is connected to the right frame component 76 of the frame 21 of the wheelchair 9 positioned on the apparatus main body 5.
And the rotation of the right hook 49 is prevented by the abutment, and the right guide arm 45 supporting the right hook 49 is rotated in a falling direction, so that the right hook 49 is The right operating base 27 is moved downward while being slid downward by the right frame component 76 and in a state where the right hook 49 is hooked on the right frame component 76 and urged downward. It is configured to be able to form a right frame fixed stroke consisting of a downwardly biased state in which the movement is stopped. Then, either one of the left frame fixed stroke and the right frame fixed stroke ends in advance, and the left operating base 26 or the right operating base 27
Even if the movement of one of the operation bases is stopped, the movement of the other operation base
It is configured to continue the other process.

On the other hand, when the retract switch 72 is operated, the lead screw 3 is driven by the motor 32.
0, the left and right operation bases 26 and 27 are moved in the separating direction (this is a direction approaching the left and right fixing blocks 42 and 43), and as shown in FIG. The right and left hooks 4 through 50 and 51
It is configured such that each of the members 8 and 49 can be turned in the direction of falling inward and stored in the apparatus main body 5. As shown in FIGS. 8 and 9, the left and right push bars 3 extending from the left and right operation bases 26 and 27 are provided.
The tips of the left and right guide arms 44 and 45 are brought into contact with the concave portions 81 and 81 formed at the lower ends of the left and right guide arms 44 and 45, and the lower ends of the left and right guide arms 44 and 45 are moved by the push bars 35 and 36. The upper ends of the guide arms 44 and 45 can be rotated downward by pressing.

The control device provided in the control box 74 has a detection circuit for detecting a current to the motor 32 which moves the left and right operation bases 26 and 27 of the hooking mechanism 6, and has a detection circuit. When both the frame fixing process and the right frame fixing process are completed, and both the left operation base 26 and the right operation base 27 are stopped to detect an overcurrent in the detection circuit; and The left and right hooks 48 and 49 are stored, and the left and right operation bases 26 and 27 are brought into contact with the left and right slide stoppers 37 and 38 provided in the casing 7 and stopped. And a shutoff circuit that shuts off the supply of electric power to the motor 32 when the power is turned off. Instead of detecting the overcurrent, the motor 32 may be a motor with a speed sensor and the power supply may be cut off when the rotation of the lead screw 30 is stopped.

In this embodiment having the above structure, the wheelchair 9 is mounted on the floor 2 on which the wheelchair fixing device 1 is provided.
When fixing the vehicle, first, both drive wheels 10, 1 of the wheelchair 9 are fixed.
1 and the left and right wheel mounting portions 12 and 13 of the wheelchair fixing device 1.
After the front and rear positions of the wheelchair 9 with respect to the apparatus main body 5 are determined, the brakes provided on the wheelchair 9 are applied. Then, by operating the fixed switch 71 provided on the control panel 73 to operate the motor 32 provided on the wheelchair fixing device 1,
The left and right operation bases 26 and 27 are moved in the approaching direction close to each other by rotating the lead screw 30 together with the gears provided in the gears. Then, the left and right operation transmission arm 5
Each of the left and right hooks 48, 49 is rotated in the upright direction via 0, 51.

At this time, one of the left and right hooks 48, 49, if the left hook 48 precedes the right hook 49, on the left side of the frame 21 of the wheelchair 9 positioned on the apparatus main body 5 depending on the conditions described later. Frame constituent member 75
Assuming that it was in contact with
When the rotation of the left hook 48 is prevented by the contact, the left guide arm 44 supporting the left hook 48 is rotated in a direction of falling from this point, and the left hook 48 is rotated.
Is moved downward while being slid by the left frame component member 75 of the frame 21. Then, with the downward movement of the left hook 48, the left hook 48 is hung by the left frame component member 75 and urged downward, and the wheelchair 9 arranged on the apparatus main body 5 has its The left frame component 75 forming the frame 21 is connected to the left hook 48.
Is fixed to the floor 2. At this time, the left operating base 26 for operating the left hook 48 is stopped because the operating resistance is increased, and the rotation of the lead screw 30 that continues to rotate due to the stop of the left operating base 26 causes the motor to rotate via the support member 31. Right operating base 27 with 32
To move. As a result, the movement of the right operating base 27 for operating the right hook 49 is continued, so that the right hook 49 is attached to the right frame component 76 of the wheelchair 9 disposed above the right fixing block 43 as described above. And the right frame member 76 is urged downward while being hooked by the right hook 49, and the wheelchair 9 is moved to the right frame forming the frame 21. The constituent member 76 is fixed to the floor 2 by the right hook 49. At this time, since the left and right hooks 48 and 49 are hooked on the left and right frame components 75 and 76, the reaction force from the wheelchair 9 applies the left and right hooks 4 and 4.
8, 49, the operating resistance is increased from the left and right operation bases 26, 27, the current flowing to the motor 32 moving the left and right operation bases 26, 27 is increased, and the detection circuit provided in the control device of the control box 74 has Since the overcurrent is detected, the drive of the left and right operation bases 26 and 27 by the motor 32 is stopped when the cutoff circuit cuts off the supply of power to the motor 32.

Here, one of the left and right hooks 48 and 49 is first brought into contact with the frame member of the frame 21 of the wheelchair 9 under the following conditions alone or in combination. This is caused by the action of

(1) The difference in the height position of the left and right frame components 75 and 76 that changes according to the size of the wheelchair 9, specifically, the width of the frame 21.

(2) Variations in the height of the left and right frame components 75 and 76 in the manufacture of the wheelchair 9 and the dimensions from the center of the wheelchair 9 to the left and right frame components 75 and 76.

(3) Difference in arrangement position due to the stop position (positioning) of the wheelchair 9 with respect to the apparatus main body 5 being offset to one of the left and right sides.

(4) The left and right operation bases 2 due to the difference in weight applied to the left and right operation bases 26 and 27 depending on the presence or absence of the motor 32 and the resistance difference between the left and right of the guide rail 25.
Left and right operation base 2 due to mechanical resistance applied to 6, 27
6,27 movement resistance difference.

According to the conditions (1) to (4), even if one of the left and right hooks 48, 49 comes in contact with the frame member of the frame 21 of the wheelchair 9 first, the left and right hooks 48, 49 Can be reliably engaged with the left and right frame components 75 and 76.

In the above state, the wheelchair 9 positioned on the apparatus main body 5 has the left and right frame components 75, 76 forming the frame 21 thereof, and the left and right hooks 48, 49 of the apparatus main body 5 provided on the floor 2. As a result, it is not necessary to cross-fix the fixing band to the frame 21 and the left and right driving wheels 10 and 11. Therefore, the band does not need to be fixed to the floor at all times, thereby preventing the band from being inadvertently extended from the floor when not in use. In addition, the belt is crossed over the drive wheels 10 and 11, and the buckle provided at the end of the belt has to be hooked to the mounting portion provided on the floor, as compared with the conventional method. The wheelchair 9 can be fixed without the help of an attendant.

The left and right hooks 48, 49 are rotated so as to draw an arc until they come into contact with the left and right frame components 75, 76, and are lowered after being brought into contact with the left and right frame components 75, 76. The frame members 75 and 76 are moved in the direction, and are fixed in a state where the frame members 75 and 76 are urged downward. Therefore, the range of engagement by the hooks 48 and 49 can be widened, and the arrangement of the frame members 75 and 76 can be increased. Can be absorbed and fixed.

Furthermore, even if one of the left and right hooks 48, 49 hooks one of the frame members in advance, the operation is continued until the other hook hooks the other frame member. Is continued, the center of the wheelchair 9 arranged on the apparatus main body 5 is shifted from the center position of the apparatus main body 5, and the left and right frame forming members 75, 76 forming the frame 21 of the wheelchair 9 are positioned at the center position. The left and right hooks 48, 49
To the left and right frame components 75, 76 securely.
Can be fixed.

Therefore, the distance between the left and right frame components 75 and 76 that changes according to the size of the wheelchair 9, specifically, the width of the frame 21, and the left and right that changes according to the height of the frame 21. Frame components 75, 7
Even when the height position of the wheelchair 6 is different, or when the stop position of the wheelchair 9 with respect to the apparatus main body 5 is biased to one of the right and left sides, it is possible to securely lock and fix the wheelchair 9.

When the fixing switch 71 of the control panel 73 is operated and the hooks 48 and 49 are operated in a state where the wheelchair 9 is not arranged on the wheelchair fixing device 1, FIG. 11 (only the left hook is shown), the left and right hooks 48,
The first flat surfaces 62, 62 formed on the left and right hook arms 52, 53 of the left and right hook arms 52, 53
The second flat surfaces 63, 63 formed at the leading ends of 0, 51 are in contact with each other. Thereby, the left and right operation transmission arms 50,
The second pivot point b of the left and right hooks 48, 49 with respect to 51 is the first pivot point a of the left and right hooks 48, 49 with respect to the left and right guide arms 44, 45, and the left and right brackets with respect to the left and right brackets 28, 29. Operation transmission arm 50,5
It can be prevented from moving upwardly over each virtual line L connecting to the first third rotation point c and deviating from the movement area set below the virtual line L.

For this reason, the second pivot point b of each of the hooks 48, 49 is moved upward over each of the imaginary lines L, and the hooks 48, 49 are tilted. When stored in the body 5, each hook 4
It is possible to reliably prevent a trouble such that the storage units 8, 49 are tilted in the opposite direction to the storage direction. Thus, the number of parts to be configured is smaller than that in the case where a rotation stopper for restricting the rotation of the left and right guide arms 44 and 45 is provided so that the second rotation point b does not exceed the virtual line L. Can be reduced, and cost reduction can be achieved.

On the other hand, the left and right frame components 7 of the wheelchair 9
When releasing the left and right hooks 48 and 49 with the hooks 5 and 76 and storing them in the apparatus main body 5, the control panel 73 is used.
By operating the storage switch 72 provided in the motor 3
2 and the lead screw 30 is rotated together with the gear provided on the motor 32 to move the left and right operation bases 26 and 27 in a separating direction in which they are separated from each other. Then, as shown in FIG. 7, the left and right hooks 48 and 49 are rotated in the direction of falling inward via the left and right operation transmitting arms 50 and 51, respectively.

At this time, each of the left and right guide arms 44 and 45 for supporting the left and right hooks 48 and 49 at the distal end has a lower end provided on the left and right operation bases 26 and 27 as shown in FIG. Left and right push bars 35,3
6, the upper ends supporting the left and right hooks 48 and 49 are pivoted downward. As a result, as shown in FIG. 9, the left and right hooks 4 set at the upper ends of the respective guide arms 44 and 45 are formed.
8, 49, the first pivot point a
45 can be moved downward around the fourth pivot point d, so that each hook 48, 49 in the retracted storage state can be moved without narrowing the range of engagement by the hooks 48, 49. The height position can be lowered, floor 2
The device main body 5 fixed to the device can be made thinner.

At this time, the left and right operation transmitting arms 50,
First tilt regulation contact portions 65 and 6 set on the upper surface of 51
As shown in FIG. 12 (only the left hook arm 52 is shown), a second tilt regulation contact portion 5 is set at a corner of the first flat surfaces 62, 62 of the left and right hook arms 52, 53. 66, 66, the two hooks 48, 49
Since the rotation in the falling direction is regulated at this point,
The contact with the bottom surface of the casing 7 can be prevented.
Therefore, compared with the case where the stopper rubbers must be protruded from each of the hooks 48 and 49 in order to restrict the inclination of the left and right hooks 48 and 49, the number of constituent parts can be reduced. Cost can be reduced.

FIG. 13 (only the left hook 48 side is shown).
Is that the left hook 48 is the left frame component 75 of the wheelchair 9
FIG. 5 is a view showing a range where the left hook arm 52 is locked.
The normal range NA in which the amount of protrusion of the hook portion 54 from the front end can be hooked in an unadjusted state is shown. Above the normal range NA, a high position range HA when the amount of projection of the hook portion 54 from the left hook arm 52 is set to be large,
A left hook arm 5 is provided below the normal range NA.
The low position range LA when the amount of protrusion of the hook portion 54 from the position 2 is set small is shown. As described above, by adjusting the amount of protrusion of the hook portion 54 from the left hook arm 52, the range in which the hook 48 can be hooked can be easily enlarged.

[0048]

As described above, in the wheelchair fixing device according to the first aspect, the frame of the wheelchair disposed on the device main body is connected to the device main body and the hook provided on the device main body via the hook provided on the device main body. Since it can be fixed to the floor, it is not necessary to cross-fix the fixing band to the wheelchair frame. Therefore, the band does not need to be fixed to the floor at all times, thereby preventing the band from being inadvertently extended from the floor when not in use. Further, the hook is rotated so as to draw an arc until it comes into contact with the frame, and then is moved downward after being brought into contact with the frame, thereby fixing the frame in a state of being urged downward. The frame of the wheelchair within the rotation locus of the hook portion can be hung, and variations in the arrangement of the frame can be absorbed and fixed. Therefore, even if there are various types of wheelchair frames, it is possible to cope with one device.

On the other hand, when storing the hook hooked on the frame of the wheelchair, the hook can be stored in a state where the hook is tilted by moving the operating base in a direction approaching the fixed block. At this time, the lower end of the guide arm on which the hook is supported is pressed by a push bar extending from the operation base, whereby the upper end can be rotated downward, whereby
The support point of the hook set at the upper end of the guide arm can be moved downward. Therefore, the height position of the hook in the retracted storage state can be lowered without narrowing the hooking range of the hook, and the thickness of the apparatus body fixed to the floor can be reduced.

At this time, the operation transmitting arm and the hook rotated by the operation transmitting arm are provided with tilting contact portions which are in contact with each other. Abuts at the tilt-restriction contact portion, whereby the rotation of the hook in the falling direction is restricted. For this reason, in order to restrict the hook from tilting more than necessary, it is possible to reduce the number of constituent parts and reduce cost as compared with a case where a stopper rubber must be protruded from the hook. be able to.

According to a second aspect of the present invention, in the wheelchair fixing device, one side is defined by an imaginary line connecting a rotation axis of the hook with respect to the guide arm and a rotation axis of the operation transmission arm with respect to the operation base. In addition, while setting the movement area of the pivot point of the hook with respect to the operation transmission arm, when the wheelchair frame is latched and urged downward, the movement of the operation transmission arm and the hook are restricted. By the contact at the contact portion, the movement of the pivot point of the hook with respect to the operation transmitting arm to the other side beyond the imaginary line can be restricted. Accordingly, it is possible to prevent a problem that the pivot point is moved to the other side beyond the imaginary line and the hook is tilted in a direction opposite to the storage direction when the hook is tilted. Can be. Therefore, the number of components can be reduced as compared with the case where a rotation stopper for restricting the rotation of the guide arm must be provided so that the rotation point does not exceed the virtual line. Cost reduction can be achieved.

In the wheelchair fixing device according to the third aspect, as in the case of the first aspect, the left and right frame forming members forming the frame of the wheelchair arranged on the device main body are combined with the device main body and the left and right frame components. Since it can be fixed to the floor via the left and right hooks provided on the device main body, it is not necessary to cross-fix the fixing band to the wheelchair frame. Therefore, the band does not need to be fixed to the floor at all times, thereby preventing the band from being inadvertently extended from the floor when not in use. Further, the left and right hooks are rotated so as to draw an arc until they come into contact with the left and right frame components, and are moved downward after being brought into contact with the left and right frame components, thereby lowering the two frame components downward. Since the fixing is performed in the biased state, the range of engagement by the two hooks can be widened, and the variation in the arrangement of the frame components can be absorbed and fixed.

In addition, even if one of the left and right hooks locks one of the frame members in advance, the operation continues until the other hook locks the other frame member. Therefore, even if the center of the wheelchair arranged on the device body is shifted from the center position of the device body, the left and right frame components forming the frame of the wheelchair are shifted from the center position, Securely hook the left and right hooks to the left and right frame components,
Can be fixed. This allows wheelchair size,
Specifically, even when the interval between the left and right frame components that changes according to the width dimension of the frame and the height position of the left and right frame components that changes according to the height dimension of the frame are different, Also, even when the stop position of the wheelchair with respect to the device body is offset to one of the left and right,
The hook can be securely fixed.

On the other hand, when storing the left and right hooks on which the left and right frame members of the wheelchair are hooked, the rotating means is operated to rotate the lead screw to move the left and right operating bases in the separating direction for separating from each other. The left and right hooks can be stored in a state where they are tilted inward. At this time, the lower end of the left and right guide arm on which the left and right hooks are supported is pressed by the right and left push bars extending from the left and right operation bases, whereby the upper end can be rotated downward. The support points of the left and right hooks set at the upper end of each guide arm can be moved downward. Therefore, the height position of each hook in the retracted storage state can be reduced without narrowing the hooking range of the two hooks, and the thickness of the apparatus main body fixed to the floor can be reduced.

At this time, the left and right operation transmitting arms and the left and right hooks rotated by the respective operation transmitting arms are provided with tilting restricting contact portions that contact each other.
When the left and right operation transmitting arms and the left and right hooks are in contact with the tilt restricting contact portion, the rotation of each hook in the falling direction is restricted. For this reason, the number of components can be reduced compared to the case where stopper rubbers must be protruded on both hooks in order to restrict the left and right hooks from tilting more than necessary. Can be achieved.

Further, in the wheelchair fixing device according to the fourth aspect, a left and right virtual axis connecting a rotation axis of the left and right hooks to the left and right guide arm and a rotation axis of the left and right operation transmission arm to the left and right operation base. On one side of the line, while setting the movement area of the rotation point of the left and right hooks with respect to the left and right operation transmission arm, while latching the left and right frame components of the wheelchair to urge downward, Each of the left and right operation transmission arms and each of the hooks abuts at the movement restricting abutment portion, so that the pivot point of each of the hooks with respect to each of the operation transmission arms moves to the other side beyond the imaginary line. Movement can be regulated.

For this reason, the pivot point of each hook is moved to the other side beyond the imaginary line, and when the two hooks are tilted, the respective hooks are opposite to the storage direction. This makes it possible to reliably prevent such a problem that the user is tilted. This makes it possible to reduce the number of components to be configured, as compared with a case where a rotation stopper for restricting the rotation of the left and right guide arms is provided so that the respective rotation points do not exceed the respective virtual lines. In addition, cost can be reduced.

[0058]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the wheelchair fixing device according to the embodiment is operated.

FIG. 3 is a perspective view showing the wheelchair fixing device according to the embodiment with a wheel positioning cover removed.

FIG. 4 is a perspective view showing a state in which the cover with wheel positioning of the wheelchair fixing device according to the first embodiment is removed and activated.

FIG. 5 is an exploded perspective view of the embodiment.

FIG. 6 is a perspective view showing a use state of the embodiment.

FIG. 7 is an explanatory diagram showing an operation procedure in which the left and right hooks of the wheelchair fixing device according to the embodiment are stored in the device main body.

FIG. 8 is an explanatory diagram showing an operation procedure following FIG. 7;

FIG. 9 is an explanatory diagram showing an operation procedure following FIG. 8;

FIG. 10 is an exploded perspective view showing a left hook and a left operation transmission arm in the embodiment.

FIG. 11 is a diagram showing a state in which a second flat surface of the left operation transmission arm according to the embodiment is in contact with a first flat surface of the left hook.

FIG. 12 is a diagram showing a state in which a first tilt-regulating contact portion of the left operation transmission arm according to the embodiment comes into contact with a second tilt-regulating contact portion of the left hook.

FIG. 13 is an explanatory diagram showing a range in which the left hook of the embodiment is hooked on a left frame component of the wheelchair.

FIG. 14 is a plan view showing a conventional example.

FIG. 15 is a perspective view showing a use state of the wheelchair fixing device in the conventional example.

[Explanation of symbols]

 Reference Signs List 1 wheelchair fixing device 2 floor 5 device main body 6 hooking mechanism 7 casing 9 wheelchair 21 frame 24 bottom surface 25 guide rail 26 left operating base 27 right operating base 30 lead screw 31 support member 32 motor (rotating means) 33 driven nut 35 left Push bar 36 Right push bar 42 Left fixed block 43 Right fixed block 44 Left guide arm 45 Right guide arm 46 Right spring 48 Left hook 49 Right hook 50 Left operation transmission arm 51 Right operation transmission arm 54 Hook 55 Hook 62 First Flat surface (movement restricting contact portion) 63 second flat surface (movement restricting contact portion) 65 first tilt restricting contact portion 66 second tilt restricting contact portion 75 left frame component 76 right frame configuration Member a First turning point b Second turning point c Third Rotation point L Virtual line

Claims (4)

[Claims] 1. An apparatus main body fixed to a floor, a fixing block provided on a casing of the apparatus main body, a guide arm rotatably supported by the fixing block, and a guide arm rotatable around an upper end of the guide arm. A hook movably supported and having a hook-shaped hook portion at one free end, an operation transmission arm rotatably supporting the other free end of the hook at a tip end, and the operation transmission An operation base that rotatably supports a base end of the arm; a moving unit that moves the operation base in a direction toward and away from the fixed block along a left-right direction of a casing of the apparatus main body; A push bar extending from the base and pressing a lower end portion of the guide arm when the operation base is moved in the approaching direction, comprising: When moving in the separating direction, the hook is rotated in the upright direction via the operation transmission arm, and the hook is brought into contact with a frame of a wheelchair positioned on the apparatus main body. The rotation of the hook is prevented by the contact, the rotation of the guide arm supporting the hook in the falling direction is started, and the hook is moved downward while sliding on the frame. A movable state, and a downwardly biased state in which the hook portion of the hook is hooked to the frame and downwardly biased with the downward movement of the hook. When the operating base is moved in the approaching direction by moving means, the push bar is turned in a direction to fall down via the operation transmitting arm, and the push bar extends from the operating base. By pressing the lower end of the guide arm to rotate the upper end of the guide arm downward, the operation transmission arm and the hook rotated by the operation transmission arm abut against each other. A fixing device for a wheelchair, wherein a tilt control contact portion for restricting rotation of the hook in the falling direction is set. 2. A virtual line connecting a rotation axis of the hook with respect to the guide arm and a rotation axis of the operation transmission arm with respect to the operation base is assumed, and one side of the virtual line as a boundary, A regulating structure that regulates the movement of the pivot point to the other side from the imaginary line when setting the downward biasing state while setting the movement area of the pivot point of the hook with respect to the operation transmission arm. 2. The wheelchair fixing device according to claim 1, wherein the operation transmitting arm and the hook are configured to include a movement restricting contact portion which is set in contact with each other. 3. An apparatus main body fixed to a floor, a guide rail extending along a left-right direction in a casing of the apparatus main body, and a pair of left and right fixings provided on left and right portions of the guide rail. A left and right guide arm rotatably supported by each of the fixed blocks; and a left and right side having a hook-like hook at one free end, rotatably supported at the upper end of each guide arm. A hook, a left and right operation transmitting arm rotatably supporting the other free end of each hook at the distal end, and a base end of each operation transmitting arm rotatably supported, A left and right operation base provided movably along the guide rail, and a lead screw provided on one of the two operation bases and extending to the other operation base side are rotatably supported. Holding member; rotating means for rotating the lead screw supported by the support member; provided on the other operation base; screwed to the lead screw; A screwing member that moves the bases in the approaching direction and the separating direction in which the bases move closer to each other; Left and right push bars respectively pressing the left and right parts. When the lead screw is rotated and the left and right operation base is moved in the approaching direction, the left operation transmission arm is turned in the upright direction. The hook is brought into contact with the left frame member of the wheelchair positioned on the apparatus main body, and the rotation of the left hook is stopped from the point in time when the rotation is prevented. The left guide arm supporting the hook is rotated in a direction to fall down, the left hook is moved downward while sliding on the left frame member, the left hook is hooked on the left frame member, and The left frame fixed stroke in which the movement of the left operation base is stopped in a state of being urged downward, and the right hook rotated in the upright direction by the right operation transmission arm are positioned on the apparatus main body. The right guide arm supporting the right hook is rotated in a direction of falling from the time when the rotation is stopped when the right hook is in contact with the right frame component of the wheelchair, and the right hook slides on the right frame component. A right frame fixing process in which the right hook is hooked on the right frame component and the movement of the right operating base is stopped in a state of being urged downward. In addition to the above configuration, even if one of the left frame fixed process and the right frame fixed process is completed in advance, the other process is continued, while rotating the lead screw, When the left and right operation base is moved in the separating direction, each of the left and right hooks is turned in a direction to fall inward via the left and right operation transmission arm, and by the left and right push bar extended from the left and right operation base. By pressing the lower ends of the left and right guide arms to rotate the upper ends of both guide arms downward, the left and right operation transmitting arms and the left and right hooks rotated by the respective operation transmitting arms are brought into contact with each other. A wheelchair fixing device, wherein a tilt-restricting contact portion is provided for restricting rotation of the hooks in a falling direction in contact with each other. 4. A left and right virtual line connecting a rotation axis of each hook with respect to each guide arm and a rotation axis of each operation transmission arm with respect to each operation base is assumed. On one side of the boundary, a moving area of a pivot point of each hook with respect to each of the operation transmitting arms is set, and each hook forms a downwardly biased state in which a corresponding frame component is biased downward. In this case, the restricting structure for restricting the movement of each pivot point to the other side in each imaginary line is constituted by the movement restricting contact portions which are set to the respective operation transmitting arms and the respective hooks and abut against each other. 4. The wheelchair fixing device according to claim 3, wherein: