JP2018134243A - Wheelchair fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair fixing device capable of performing stable locking even when a height of a locked member arranged in a wheelchair is changed.SOLUTION: In hook plates 106, 206, slide contact parts 116a, 216a are arranged in parts of lower inner peripheral surfaces 116, 216 of lock holes 114, 214 extending from a base end side to a tip end side. Lock bars 320, 420 have movably sliding contact with the slide contact parts 116a, 216a of the lock holes 114, 214, change swing angles of the hook plates 106, 206 whenever the slide contact positions are changed, and are normally energized to pressurize the hook plates 106, 206 in a lock direction via the slide contact parts 116a, 216a.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a wheelchair fixing device.

  Patent Literature 1 and Patent Literature 2 are known as fixing devices for fixing a wheelchair that has entered a passenger compartment. In Patent Document 1, a wheelchair is fixed by connecting a wheelchair frame and a passenger compartment floor by a plurality of belt members and securing members. Moreover, in patent document 1, it is also made possible to adjust the length of a securing member with an automatic winding apparatus.

  The fixing device of Patent Document 2 passes a wheel guide that restricts the lateral movement of the wheelchair, a belt guide provided on the passenger compartment floor, and holds the fixing belt in a tension state. Belt tensioning means.

  However, the above-described fixing device requires the work of a person who connects the belt member, the fixing belt, and the like to the wheelchair, which is complicated and laborious.

JP 2002-209946 A JP 2000-116713 A

Therefore, there is a need for a wheelchair fixing device that automatically latches and fixes a locked member provided at a specific part of the wheelchair when the wheelchair is fixed to the passenger compartment.
However, in order to improve the ride comfort, the main wheel (tire) of the wheelchair is made of rubber or the like. Therefore, the height of the locked member changes depending on the weight of the seated person. There is a difficult problem to do.

  An object of the present invention is to provide a wheelchair fixing device that can be stably locked even if the height of a locked member provided in the wheelchair changes.

  In order to solve the above-described problems, the wheelchair fixing device of the present invention has a base end pivotally supported so as to be swingable in the vertical direction, and one of the vertical directions is set as a locking direction and the other is counteracted. A wheelchair that includes a hook member having a hook portion that latches and locks a locked member of the wheelchair on the side on the locking direction side of the upper and lower sides when the locking direction is set, and the wheelchair is fixed by the hook member In the fixing device, the hook member has a sliding contact portion extending from the proximal end side toward the distal end side, and is slidably movable with respect to the sliding contact portion, and the sliding contact position is changed. In addition to changing the swing angle of the hook member every time, the lock member is constantly biased so as to press the hook member in the locking direction via the sliding contact portion.

Further, the hook member is formed with a long hole-like lock hole extending from the base end side toward the tip end side, and the sliding contact portion may be a lower inner peripheral surface or an upper inner peripheral surface of the lock hole. Good.
The sliding contact portion has a concave curved surface, and is formed so that a tangent angle at a contact point between the locking member and the concave curved surface is constant even when a sliding contact position with the locking member is displaced. May be.

  A plurality of combinations of the hook member and the lock member may be provided.

  ADVANTAGE OF THE INVENTION According to this invention, even if the height of the to-be-latched member provided in the wheelchair changes, there exists an effect which can be locked stably.

(A) is a top view of the wheelchair fixing device of one Embodiment, (b) is a side view of a wheelchair fixing device similarly. The principal part perspective view of a wheelchair fixing device. The principal part top view of the wheelchair fixing device at the time of a wheelchair waiting state. The principal part top view of the wheelchair fixing device at the time of a wheelchair locked state. The principal part top view of the wheelchair fixing device at the time of lock release. The schematic explanatory drawing of the release lever at the time of a wheelchair waiting state. Schematic explanatory drawing of the release lever when the wheelchair is locked. The schematic explanatory drawing of the release lever at the time of lock release. The schematic explanatory drawing of the principal part of the wheelchair fixing device at the time of a wheelchair waiting state. The schematic explanatory drawing of the principal part of the wheelchair fixing device at the time of a wheelchair locked state. The schematic explanatory drawing of the principal part of the wheelchair fixing device at the time of lock release. Explanatory drawing of the principal part of a wheelchair fixing device when a wheelchair is a locked state. Sectional drawing of a hook plate, an outer plate, and an inner plate. Explanatory drawing of an effect | action of a hook plate. Explanatory drawing of the lower inner peripheral surface of a lock hole. Schematic explanatory drawing of a wheelchair.

Hereinafter, a wheelchair fixing device 10 according to an embodiment of the present invention will be described with reference to FIGS.
The wheelchair 20 will be briefly described with reference to FIG. The wheelchair 20 includes a seat portion 24, a backrest 26, an armrest 28, and a step 30 on a frame 22 made of a metal pipe. The frame 22 is supported by a pair of main wheels 32 and auxiliary wheels 34 disposed on both the left and right sides, and can run freely. The frame 22 is provided with a grip 36 used when an assistant pushes the wheelchair 20. In the present embodiment, an anchor bar 38 as a locked member is provided at the lower part of the frame 22. The metal anchor bar 38 is integrally connected to the lower portion of the frame via a connecting portion 38a that rises upward at the left and right ends, and is provided across the width direction (left and right direction) of the wheelchair 20. The length of the anchor bar 38 in the left-right direction is longer than the distance between hook plates 106 and 206 of the wheelchair fixing device 10 described later. In the present embodiment, the anchor bar 38 has a circular cross section, but the shape of the cross section is not limited.

In addition, the main wheel 32 and the auxiliary wheel 34 consist of an air tire or a no-puncture tire, and have elasticity.
If the height from the ground contact surface of the anchor bar 38 of the wheelchair 20 is h1, this height h1 is the weight of the person sitting on the wheelchair 20, and if the main wheel 32 and the auxiliary wheel 34 are air tires, Variable according to the air pressure level.

<Wheelchair fixing device 10>
Next, the wheelchair fixing device 10 will be described.
As shown in FIG. 1A, the wheelchair fixing device 10 includes a pair of hook devices 100 and 200 arranged on the left and right sides, a pair of lock mechanisms 300 and 400 that lock the hook devices 100 and 200, and a lock. An operation unit 500 that performs an unlocking operation on the lock mechanisms 300 and 400 in the state and a pair of interlock mechanisms 600 and 700 are provided.

As shown in FIG. 1A and FIGS. 3 to 5, the wheelchair fixing device 10 includes a lock releasing unit 800 that releases the locked state of the hook devices 100 and 200.
<Hook device 100, 200>
As shown in FIGS. 1 (a), 1 (b), and 2, the hook devices 100 and 200 are arranged on the left and right sides of the vehicle with respect to the upper surface of the base plate 12 fixed to the vehicle compartment floor (not shown). They are spaced apart from each other in the direction and are arranged along the front-rear direction.

  The hook device 100 is sandwiched between an outer plate 102 and an inner plate 104 erected on the base plate 12, and both plates 102 and 104, and a base end swings up and down with respect to the front ends of both plates 102 and 104. The hook plate 106 is supported by a shaft 108 so as to be movable. The rotation position at which the lower side portion of the hook plate 106 is in contact with the base plate 12 is set as the lowest limit position. The hook plate 106 corresponds to a hook member.

  As shown in FIGS. 1B, 2, and 12, the lower side portion of the rear end (that is, the front end) of the hook plate 106 has an oblique guide portion 110 so that the vertical width becomes narrower toward the front end side. Is provided. Further, the hook plate 106 is recessed upward so that the hook portion 112 adjacent to the terminal end (front end) of the guide portion 110 can be locked to the anchor bar 38 of the wheelchair 20. That is, the guide part 110 corresponds to a part on the rear side (anti-intrusion direction) side of the hook part 112. The state in which the hook portion 112 is locked to the anchor bar 38 of the wheelchair 20 corresponds to the locked state. Further, the downward direction of the rotation direction of the hook plate 106 corresponds to the locking direction, and the upward direction corresponds to the counter-locking direction.

  As shown in FIGS. 1B, 11, and 12, the hook plate 106 is formed with an elongated lock hole 114 extending from the front end (that is, the base end) to the substantially central portion in the rear direction. Has been. That is, the lock hole 114 extends from the proximal end side of the hook plate 106 toward the distal end side.

  In FIG. 12, the height h1 of the anchor bar 38 is that of the introduction portion 725 (see FIG. 9) of the engagement recess 723 when the lock piece 724 of the interlock member 720 described later is in contact with the base plate 12. When the height is higher than the height h, the locked state when the hook portion 112 is locked to the anchor bar 38 (when hooked) is shown. In this case, as shown in FIG. 12, the hook plate 106 is separated upward from the base plate 12 with which the lower side portion is in contact.

  As shown in FIG. 12, the lock hole 114 has a lower inner peripheral surface 116 and an upper inner peripheral surface 117 extending in the front-rear direction. The lower inner peripheral surface 116 has a sliding contact portion 116a and a sliding contact portion formed so that the vertical width thereof (that is, the distance between the lower inner peripheral surface 116 and the upper inner peripheral surface 117) is longer than the diameter of the lock bar 320 described later. And a recess 116b connected to the front end of 116a.

  In addition, the sliding contact portion 116a is a concave curved surface having a constant radius of curvature so as to go upward from the proximal end side toward the distal end side when the hook portion 112 is engaged with the anchor bar 38 of the wheelchair 20. It is formed to have. The concave curved surface allows a change in the swing angle of the hook plate 106 each time the lock bar 320 having a circular cross section described later moves in the front-rear direction (that is, slidably contacts) and the slidable contact position changes. Is formed. The concave curved surface is formed so that the tangent angle α of the concave curved surface at the contact point of the lock bar 320 is constant even when the sliding contact position of the lock bar 320 with respect to the sliding contact portion 116a is displaced. FIG. 15 is an explanatory diagram for the tangent angle α. As shown in the figure, the tangent angle α is a line L1 parallel to the moving direction of the lock bar 320 at the contact P (contact point) between the sliding contact portion 116a and the lock bar 320, and a circular cross section at the contact P. It is an angle with the tangent L2 of the lock bar 320 to be formed. In FIG. 15, O <b> 1 indicates the central axis of the lock bar 320.

  When the lock bar 320 moves rearward and presses the sliding contact portion 116a, the hook plate 106 has a small swing angle, and when the lock bar 320 moves forward, the hook plate 106 presses the sliding contact portion 116a. Is released and the swing angle is allowed to increase. In this embodiment, the swing angle is based on the state in which the lower side portion of the hook plate 106 is in contact with the base plate 12, and from this state, the hook plate 106 swings in the anti-locking direction. Is an angle.

  As shown in FIG. 1A, the outer plate 102 and the inner plate 104 are arranged in parallel with the hook plate 106, and are separated from the hook plate 106 by spacers 101a, 101b, etc. penetrating the shaft 108. Has been. As shown in FIGS. 12 and 13, through holes 118 and 120 are formed in the outer plate 102 and the inner plate 104, respectively. The through holes 118 and 120 are formed in a long hole shape extending backward from the base end. The upper inner peripheral surfaces 118a and 120a of the through holes 118 and 120 have the same height and are horizontally disposed, and the hook portion 112 of the hook plate 106 shown in FIG. In the stop state), the lock hole 114 is formed so as to be positioned below the upper inner peripheral surface 117.

  Further, as shown in FIG. 13, the lower inner peripheral surfaces 118b, 120b of the through holes 118, 120 extend horizontally, and the lock hole 106 shown in FIG. It is located below the lower inner peripheral surface 116 of 114. Further, the lengths of the through holes 118 and 120 in the front-rear direction are set so as not to interfere with a reciprocating track of a lock bar 320 described later.

  As shown in FIGS. 2 and 12, a stopper surface 102 a extending in the vertical direction is formed on the rear end surface of the outer plate 102. The lower portion of the stopper surface 102a is set at a position lower than the height h1 of the anchor bar 38. The stopper surface 102a may be provided vertically, or may be provided in an oblique shape so as to face forward as it goes upward. Further, it may be arcuate so as to extend in the vertical direction. The stopper surface 102 a abuts against the anchor bar 38 of the wheelchair 20 that has entered from behind the wheelchair fixing device 10 and prevents the wheelchair 20 from moving forward.

  Each member constituting the hook device 200 is provided in a mirror-symmetrical shape (that is, a left-right symmetric shape) with reference to a virtual vertical plane that passes between the hook device 200 and the hook device 100 in the front-rear direction. For this reason, the members constituting the hook device 200 and corresponding to the members constituting the hook device 100 have the same reference numerals up to two digits out of the reference numerals attached to the members, and the third digit. Detailed description will be omitted by replacing 100 with 200.

  As shown in FIGS. 1A and 2 to 5, the hook device 200 includes the outer plate 202, the inner plate 204, and the hook plate 206 that is rotatably supported by the shaft 208 as described above. . The hook plate 206 corresponds to a hook member. As shown in FIGS. 1A and 3 to 5, a stopper surface 202 a is provided on the rear end surface of the outer plate 202.

As shown in FIGS. 3 and 4, the outer plate 202 and the inner plate 204 have through holes 218 and 220.
As shown in FIGS. 9 to 11, the hook plate 206 includes a lock hole 214 having a lower inner peripheral surface 216 and an upper inner peripheral surface 217, a guide portion 210, and a hook portion 212.

<Lock mechanism 300, 400>
Next, the lock mechanism 300 will be described.
As shown in FIGS. 2 to 4, the lock mechanism 300 is connected to the lock link portion 310, the lock bar 320 provided in the lock link portion 310, and the lock link portion 310 via a connection link 330. And a lock lever 340. The lock bar 320 corresponds to a lock member.

  The lock link portion 310 includes a main lock link 313 that is rotatably supported with respect to a shaft 312 erected at a position close to the inner plate 204 side in the base plate 12 between the inner plates 104 and 204. The auxiliary lock link 315 is supported by a shaft 314 so as to be rotatable with respect to the lock link 313. The main lock link 313 is urged counterclockwise by a torsion spring (not shown) as an urging member wound around the shaft 312.

  As shown in FIGS. 3 and 4, the shaft 314 is slidably arranged with respect to the long hole 316 provided along the longitudinal direction of the main lock link 313. Further, in the sub lock link 315, a locking projection 317 protrudes from the end of the main lock link 313 that faces the shaft 312 side.

  When the secondary lock link 315 is turned counterclockwise by the connecting link 330, the locking projection 317 is moved along the longitudinal direction within the range allowed by the long hole 316. The inner portion of the lock link 313 is formed in a slanted shape so that it can be locked to a stopper pin 318 protruding upward.

  That is, the secondary lock link 315 is configured so that the shaft 314 moves in the long hole 316 toward the shaft 312 side and the slanted inner portion of the locking projection 317 comes into contact with the stopper pin 318. While the rotation in the counterclockwise direction is promoted, the main lock link 313 is rotated counterclockwise around the shaft 312.

  A lock bar 320 is integrally attached and fixed to the end (left end) of the sub-lock link 315 on the side opposite to the shaft 312. The lock bar 320 is inserted into the inner plate 104, the hook plate 106, the through hole 120, the lock hole 114, and the through hole 118 of the outer plate 102, and a free end protrudes outward of the outer plate 102.

  The lock bar 320 has a reciprocating track that reciprocates in the front-rear direction along the horizontal line by reciprocating rotation around the shaft 312 of the lock link portion 310. Of the front and rear directions in which the lock bar 320 moves, the rear direction corresponds to the lock direction, and the front direction corresponds to the unlock direction.

  As described above, the sliding contact portion 116a of the lower inner peripheral surface 116 of the lock hole 114 is higher than the proximal end side toward the distal end side when the hook portion 112 is engaged with the anchor bar 38 of the wheelchair 20. It is formed so as to have a concave curved surface, and is set so as to intersect with the reciprocating orbit of the lock bar 320.

  As shown in FIGS. 2 to 4, the lock lever 340 is a shaft 342 erected at the center in the front-rear direction at a position close to the inner plate 204 side in the base plate 12 between the inner plates 104 and 204. It is supported so that it can rotate freely. As shown in FIG. 2, a torsion spring 344 as an urging portion is wound around the shaft 342, and the lock lever 340 is always urged counterclockwise. Each end of the connection link 330 is connected to the tip of the lock lever 340 and a portion between the shaft 314 and the lock bar 320 in the sub lock link 315.

  As shown in FIGS. 2 to 4, an engagement pin 346 is erected on the upper surface on the proximal end side of the lock lever 340. An engagement member 540 provided in the operation unit 500 described later is always engaged with the engagement pin 346, and the rotation position of the lock lever 340 can be selected according to the position of the engagement member 540. Yes. Details of the engagement relationship between the engagement pin 346 and the lock lever 340 will be described later.

The lock mechanism 400 will be described.
As shown in FIGS. 1A, 3, and 4, the lock mechanism 400 includes a lock link portion 410, a lock bar 420 having a circular cross section provided in the lock link portion 410, and the lock link portion 410. The lock lever 440 (refer FIG. 2) connected with the connection link 430 with respect to it is comprised. The lock bar 420 corresponds to a lock member. The lock link portion 410 includes a main lock link 413 rotatably supported with respect to a shaft 412 erected at a position close to the inner plate 104 side in the base plate 12 between the inner plates 104 and 204. The auxiliary link link 415 is supported by a shaft 414 so as to be rotatable with respect to the lock link 413. The main lock link 413 is urged clockwise by a torsion spring (not shown) as an urging member wound around the shaft 412.

  As shown in FIGS. 3 and 4, the shaft 414 is slidably disposed in a long hole 416 provided along the longitudinal direction of the main lock link 413. A locking projection 417 protrudes from the end of the sub lock link 415 that faces the shaft 412. When the secondary lock link 415 is turned clockwise by the connecting link 430, the locking projection 417 is locked in accordance with the movement of the shaft 414 in the longitudinal direction within the range allowed by the long hole 416. An inner portion of the link 413 is formed in an oblique shape so as to be able to be locked with respect to a stopper pin 418 protruding upward.

  That is, the secondary lock link 415 is configured so that the shaft 414 moves in the long hole 416 toward the side of the shaft 412 and the slanted inner portion of the locking projection 417 contacts the stopper pin 418. While promoting the clockwise rotation, the main lock link 413 is rotated in the clockwise direction around the shaft 412.

  A lock bar 420 is integrally attached and fixed to the end (left end) of the sub lock link 415 on the side opposite to the shaft 412. As shown in FIGS. 3 and 4, the lock bar 420 is inserted through the inner plate 204, the hook plate 206, the through hole 220, the lock hole 214, and the through hole 218 of the outer plate 202, and the free end is outward of the outer plate 202. It is protruded to.

  The lock bar 420 has a reciprocating track that reciprocates in the front-rear direction along the horizontal line by reciprocating rotation around the shaft 412 of the lock link portion 410. Of the front and rear directions in which the lock bar 420 moves, the rear direction corresponds to the lock direction, and the front direction corresponds to the unlock direction. As shown in FIGS. 9 and 10, the lower inner peripheral surface 216 of the lock hole 214 has a proximal end as it moves toward the distal end side with the hook portion 212 engaging the anchor bar 38 of the wheelchair 20 as described above. It is formed in an oblique shape so as to go upward from the side, and is set so as to intersect with the reciprocating orbit of the lock bar 420. As shown in FIG. 2, the lock lever 440 is rotatably supported so as to be positioned below the lock lever 340 with respect to the shaft 342.

  As shown in FIG. 2, a torsion spring (not shown) as a biasing portion is wound around the shaft 342, and the lock lever 440 is constantly biased counterclockwise. Each end of the connection link 430 is connected to the tip of the lock lever 440 and a portion between the shaft 414 and the lock bar 420 in the sub lock link 415.

  Similar to the engagement pin 346 of the lock lever 340, an engagement pin (not shown) is erected on the upper surface of the lock lever 440. An engagement member (not shown) provided in the operation unit 500 described later is always engaged with the engagement pin, and the rotation position of the lock lever 440 can be selected according to the position of the engagement member. ing.

<Operation unit 500>
As shown in FIGS. 1A and 2, the operation unit 500 includes an operation lever 510 and a pair of engagement members provided via brackets 530 with respect to the distal end portion (that is, the front end portion) of the operation lever 510. And a joint member 540. As shown in FIG. 2, the pair of engaging members 540 are spaced apart from each other in the vertical direction and have the same shape. In FIG. 1 (a) and FIGS. The engaging member 540 is hidden behind the upper engaging member 540. Details of both engaging members 540 will be described later.

  The operation lever 510 includes a front operation member 512 and a rear operation member 514 that is pivotally supported so as to be rotatable upward with respect to the front operation member 512. The front operation member 512 is attached to an attachment plate 16 fixed to an attachment area 14 provided on the rear end side of the base plate 12. A hole 14a penetrating in the up-down direction is formed in the attachment area 14, and the attachment plate 16 is bolted to an attachment portion arranged at the periphery of the hole 14a.

  As shown in FIGS. 6 to 8, assuming a horizontal reference line O included in the virtual vertical plane passing through the center between the hook device 100 and the hook device 200, the mounting plate 16 has the horizontal reference line O A long hole-shaped guide hole 16a is formed, and a locking portion 16b is recessed toward the right side at the rear end of the guide hole 16a. As shown in FIGS. 6 to 8, a fixed shaft 18 is erected on a portion of the mounting plate 16 that is positioned forward of the guide hole 16 a and on the horizontal reference line O.

  As shown in FIG. 2, the front operating member 512 has a state in which the fixed shaft 18 is inserted in a long hole-shaped guide hole 516 that is transparent along the longitudinal direction (that is, the front-rear direction). Is mounted on the mounting area 14. The front operation member 512 is slidable in the front-rear direction allowed by the guide hole 516 with respect to the fixed shaft 18 and is rotatable about the fixed shaft 18.

  As shown in FIGS. 1A and 2, a guide pin 518 is fixed to a portion of the front operation member 512 that is behind the guide hole 516. As shown in FIGS. 6 to 8, the lower end of the guide pin 518 is slidably inserted in the front-rear direction with respect to the guide hole 16a of the mounting plate 16 and can be engaged and disengaged with respect to the locking portion 16b. Is formed.

  As shown in FIG. 6, in the state where the fixed shaft 18 is in contact with the front end of the guide hole 516, the front operating member 512 is rotated by the front operating member 512 around the fixed shaft 18 so that the guide pin 518 is guided into the guide hole. It is possible to select a state that is the rear end position of 16a and is not engaged with the engaging portion 16b and a state engaged with the engaging portion 16b as shown in FIG.

  As shown in FIG. 6, in the following, the fixed shaft 18 is in contact with the front end of the guide hole 516, and the guide pin 518 is at the rear end position of the guide hole 16a. The position of the operation lever 510 in a state where it is not inserted is referred to as a “wheelchair waiting operation position”. As shown in FIG. 7, in the following, the position of the operation lever 510 in a state where the fixed shaft 18 is in contact with the front end of the guide hole 516 and the guide pin 518 is engaged with the locking portion 16b. This is referred to as “wheelchair lock operation position” of the operation lever 510.

  Further, the operation lever 510 is located at the “wheelchair waiting operation position” shown in FIG. 6, the fixed shaft 18 is in contact with the rear end of the guide hole 516 shown in FIG. 8, and the guide pin 518 is connected to the guide hole 16 a. Transition to a state located on the front end side is possible.

  As shown in FIG. 8, hereinafter, the position of the operation lever 510 in a state where the fixed shaft 18 is in contact with the rear end of the guide hole 516 and the guide pin 518 is located on the front end side of the guide hole 16a is referred to as “ This is called “unlocking operation position”.

  As shown in FIGS. 1A and 2, between the front operation member 512 and the mounting area 14 of the base plate 12, a biasing spring 522 that biases the front operation member 512 rearward, An urging spring 524 is urged to urge toward the direction. As shown in FIG. 6, when the operation lever 510 is positioned at the “wheelchair waiting operation position”, the guide pin 518 is locked to the rear end of the guide hole 16 a by the biasing spring 522.

<Upper engagement member 540>
As shown in FIG. 2, the pair of engaging members 540 are supported by a front end of the front operation member 512 via a bracket 530 and extend forward.

  Of the pair of engaging members 540, the engaging member 540 arranged on the upper side will be described first. As shown in FIGS. 3 to 5, on the front end side portion of the upper engagement member 540, the first contact surface 542 that contacts the engagement pin 346 of the lock lever 340 and the rear side of the first contact surface 542. A second abutment surface 544 located at the position is provided.

  When the operation lever 510 is positioned at the “wheelchair waiting operation position” as shown in FIG. 6, the first contact surface 542 presses the engagement pin 346 as shown in FIG. The urging force of the torsion spring 344 is stored in the storage position.

  When the operation lever 510 is positioned at the “wheelchair lock operation position” as shown in FIG. 7, the torsion spring is maintained while the second contact surface 544 is kept in contact with the engagement pin 346 as shown in FIG. 4. The urging force of 344 is released, and the lock lever 340 is positioned to the urging force releasing position. As shown in FIG. 8, when the operation lever 510 moves from the “wheelchair lock operation position” to the “lock release operation position”, the engagement member 540 is engaged with the engagement pin 346 against the biasing force of the torsion spring 344. Then, the lock lever 340 is rotated clockwise. During this movement, the contact portion with respect to the engagement pin 346 changes from the second contact surface 544 to the first contact surface 542, and the urging force of the torsion spring 344 is accumulated to urge the lock lever 340. Position.

<Lower engagement member 540>
On the front end side portion of the lower engagement member 540, an engagement pin (not shown) of a lock lever 440 (see FIG. 2) disposed below the lock lever 340, as with the upper engagement member 540. It has the 1st contact surface and 2nd contact surface (both not shown) which contact | abut.

  As shown in FIG. 6, when the operation lever 510 is positioned at the “wheelchair waiting operation position”, the first contact surface presses against an engagement pin (not shown) of the lock lever 440, and the lock lever 440. Is placed at the urging force accumulating position, and the urging force of a torsion spring (not shown) wound around the shaft 342 is accumulated.

  As shown in FIG. 7, when the operation lever 510 is positioned at the “wheelchair lock operation position”, the second contact surface is kept in contact with the engagement pin (not shown) of the lock lever 440 while the shaft The biasing force of a torsion spring (not shown) wound around 342 is released, and the lock lever 440 is positioned to the biasing force release position.

  As shown in FIG. 8, when the operation lever 510 moves from the “wheelchair lock operation position” to the “lock release operation position”, it resists the biasing force of a torsion spring (not shown) wound around the shaft 342. The lower engagement member 540 rotates the lock lever 440 clockwise via an engagement pin (not shown) of the lock lever 440.

  During this movement, the contact portion of the lock lever 440 with respect to the engagement pin changes from the second contact surface to the first contact surface, and the urging force of a torsion spring (not shown) wound around the shaft 342 is stored. Then, the lock lever 440 is positioned at the urging force accumulation position.

The operation lever 510 and the upper and lower engaging members 540 constitute a lock permission portion.
<Interlock mechanism 600, 700>
Next, the interlock mechanisms 600 and 700 will be described with reference to FIGS. 1 (a), 3 to 5, and 9 to 11. FIG. The interlock mechanisms 600 and 700 are provided in a mirror-symmetrical shape (that is, a symmetrical shape) with respect to the virtual vertical plane. Here, the interlock mechanism 700 will be described. The interlock mechanism 600 corresponds to each member constituting the interlock mechanism 700, and two digits of the reference numerals attached to the members of the interlock mechanism 700 are used. The same reference numerals are used and the third digit number 700 is replaced with number 600, thereby omitting a detailed description thereof.

  Although the relationship between the interlock mechanism 700 and the hook device 200 will be described below, the relationship between the interlock mechanism 600 and the hook device 100 is the same as the relationship between the interlock mechanism 700 and the hook device 200. The description is omitted.

  As shown in FIGS. 1A and 2, the interlock mechanism 700 includes a lock plate 710 provided at the front end portion of the front operation member 512, and an interlock member provided so as to be engageable with the lock plate 710. 720.

  As shown in FIGS. 1A and 3, the lock plate 710 protrudes rightward with respect to the right side portion on the rear side of the front operation member 512 with respect to the portion where the engagement member 540 is disposed. It is supported by. In the lock plate 710, an interlock hole 712 extending in the front-rear direction is penetrated in the vertical direction at a portion located below the interlock member 720.

  As shown in FIGS. 9 to 11, the interlock member 720 is pivotally supported by a shaft 711 so as to be rotatable with respect to the inner surface of the rear end of the outer plate 202. As shown in FIGS. 2 and 9, the interlock member 720 is formed in a plate shape, and a lever piece 722 is formed on both the upper and lower parts sandwiching the shaft 711, and is formed to bulge to the rear side and the lower side. A piece 724 is provided. A substantially L-shaped engagement recess 723 is provided between the lever piece 722 and the lock piece 724, and the rear end of the inner surface extending rearward of the engagement recess 723 introduces the anchor bar 38 into the engagement recess 723. An introduction part 725 for guiding is used.

  The interlock member 720 is urged by a torsion spring (not shown) wound around the shaft 711. By this urging, the interlock member 720 has the lock piece 724 with respect to the interlock hole 712 of the lock plate 710 located at the interlock position when the operation lever 510 is positioned at the “wheelchair waiting operation position”. It arrange | positions so that engagement is possible, and it can contact | abut to the base board 12 (refer FIG. 9). Here, the position of the interlock member 720 where the lock piece 724 is engaged with the interlock hole 712 of the lock plate 710 and contacts the base plate 12 corresponds to the engagement position.

  In this state, the operation lever 510 is held so as to be positioned at the “wheelchair waiting operation position” shown in FIG. 6 so that the guide pin 518 is not engaged in the locking portion 16b. The torsion spring 344 (not shown) wound around the shaft 711 may be omitted, and the locking piece 724 may be engaged with the interlock hole 712 by dropping into the interlock hole 712 by its own weight.

  Thus, the state in which the interlock member 720 is engaged in the interlock hole 712 is referred to as an interlock state. Further, the state where the interlock member 720 is not engaged with the interlock hole 712 is referred to as an interlock release state.

  As shown in FIG. 9, when the interlock member 720 is located at the engagement position, the inner surface extending rearward of the engagement recess 723 is substantially horizontal with the lock piece 724 in contact with the base plate 12. It is formed to be arranged. Further, the height h of the interlock member 720 is set so that the introduction portion 725 can easily introduce the anchor bar 38 into the engagement recess 723. That is, the height h1 of the anchor bar 38 varies as described above, but is set to a value slightly lower than the minimum height of the variable range. Further, as shown in FIG. 9, the lever piece 722 is arranged to extend upward in a state where the lock piece 724 is in contact with the base plate 12.

  In addition, the lever piece 722 is configured such that the anchor bar 38 that has started to engage the hook portion 212 of the hook plate 206 is pressed by the anchor bar 38 before the engagement to the hook portion 212 is completed, so that the lock piece 724 is engaged. It arrange | positions so that it may detach | leave from the lock hole 712 (refer FIG. 10).

  As shown in FIG. 10, when the anchor bar 38 is located in the engagement recess 723, the interlock member 720 is located in the non-engagement position, and the lock piece 724 is detached from the interlock hole 712. The state is maintained. That is, the interlock mechanism 700 is configured to maintain the interlock release state.

  Further, when the lock piece 724 is detached from the interlock hole 712 as shown in FIG. 10, the operation lever 510 is positioned at the “wheelchair lock operation position” by the urging force of the urging spring 524 as shown in FIG. This state is maintained. That is, this state is a wheelchair locked state of the wheelchair fixing device 10, and the anchor bar 38 is engaged with the hook portion 212 of the hook plate 206 and is disposed in the engagement recess 723 of the interlock member 720. .

  As shown in FIG. 8, when the operation lever 510 is in the “unlocking operation position”, the lock plate 710 is positioned so that the lock piece 724 of the interlock member 720 contacts the base plate 12 as shown in FIG. It moves to the front to the position which permits the rotation until. When the lock plate 710 is moved to this position, the anchor bar 38 located in the engagement recess 723 can be detached rearward. Here, as shown in FIGS. 4 and 5, the position of the lock plate 710 where the lock plate 710 does not engage the lock piece 724 into the interlock hole 712 is referred to as a non-interlock position.

<Unlock unit 800>
Next, the unlocking unit 800 will be described with reference to FIGS. 1, 3 to 5, and 9 to 11.

  As shown in FIGS. 1 and 3, in the hook plate 206, between the lock hole 214 and the hook portion 212, a pushed upper portion 810 directed toward the hook device 100 is provided. In this embodiment, the pressed upper portion 810 is a roller that is rotatably supported, but is not limited, and may be a bar, for example. In the hook plate 106, the pushed upper part 820 is provided toward the hook device 200 so as to be coaxial with the pushed upper part 810.

  As shown in FIGS. 1 to 5, a pair of left and right push-up members 840 and 850 are provided at the front end of the front operation member 512 via a bracket 830. The push-up members 840 and 850 are arranged in an oblique shape so as to be lowered toward the front end, and are formed so as to be able to be pushed up with respect to the pushed upper portions 820 and 810. Specifically, as shown in FIGS. 3 and 9, the push-up members 840 and 850 are pushed upward when the front operation member 512 (operation lever 510) is positioned at the “wheelchair waiting operation position”. 810 and 820 are spaced apart from each other.

  As shown in FIGS. 5 and 11, the push-up members 840 and 850 push up the pushed-up upper portions 820 and 810 when the front operation member 512 (operation lever 510) is in the “unlock operation position”. The hook plates 106 and 206 are respectively rotated in the anti-locking direction so that the anchor bar 38 engaged with the hook portions 112 and 212 can be released.

(Operation of the embodiment)
The operation of the wheelchair fixing device 10 configured as described above will be described.
<1. Waiting for wheelchair>
FIG. 3 shows a state in which the hook devices 100 and 200 of the wheelchair fixing device 10 are in a wheelchair waiting state. In this state, the interlock member 620 and the interlock member 720 have the lock piece 624 and the lock piece 724 shown in FIG. 9 engaged with the interlock holes 612 and 712, respectively, and are located at the engagement positions. Yes. Further, as shown in FIG. 6, the guide pin 518 of the front operation member 512 (operation lever 510) is prevented from being engaged in the locking portion 16b.

<2. Wheelchair lock>
When the wheelchair 20 is fixed by the wheelchair fixing device 10, it is as follows.
In the wheelchair waiting state of FIG. 3, the wheelchair 20 is moved (intruded) forward from the rear of the wheelchair fixing device 10 until the anchor bar 38 hits the stopper surfaces 102a and 202a. Here, the front direction of the wheelchair 20 corresponds to an intrusion direction. Further, the backward direction corresponds to the anti-intrusion direction.

  At this time, the anchor bar 38 of the wheelchair 20 (see FIG. 16) that has moved (invaded) hits the guide portion 110 of the hook plate 106 (see FIG. 12) and the guide portion 210 (see FIG. 10) of the hook plate 206, thereby The plates 106 and 206 are rotated upward and are engaged in the hook portions 112 and 212 to be in a locked state.

The contact of the anchor bar 38 with the guide portions 110 and 210 of the hook plates 106 and 206 may be simultaneous or there may be a time difference.
The interlock members 620 and 720 of the interlock mechanisms 600 and 700 are pressed against the biasing force of a torsion spring (not shown) by the lever pieces 622 and 722 before the anchor bar 38 is engaged with the hook portions 112 and 212. As a result, the lock pieces 624 and 724 are separated from the interlock holes 612 and 712 and positioned at the non-engagement position.

  In this embodiment, the interlock mechanisms 600 and 700 are independent of each other. However, the interlock is not released unless the interlock members 620 and 720 of both interlock mechanisms are separated from the interlock holes 612 and 712. . For this reason, even if any one of the interlock mechanisms 600 and 700 is in the interlock release state, the wheelchair locking device 10 as a whole does not complete the wheelchair locking. On the other hand, when the lock pieces 624 and 724 are separated from the interlock holes 612 and 712, as shown in FIG. 7, the front operation member 512 (the operation lever 510 is rotated around the fixed shaft 18 by the biasing force of the biasing spring 524. ) Rotates and the guide pin 518 engages with the locking portion 16b. Thus, in the wheelchair waiting state, the pair of engaging members 540 that have pressed the engaging pins 346 and the like with the first contact surface 542 move as shown in FIG. Release the restraint.

  As a result, the lock levers 340 and 440 rotate counterclockwise until the engagement pin 346 and the like move to the second contact surface 544 and contact with the urging force of the torsion spring 344 and the like wound around the shaft 342. Move.

  By the counterclockwise rotation of the lock levers 340 and 440, the lock mechanisms 300 and 400 cause the lock bars 320 and 420 to move from the state shown in FIG. 3 via the connection links 330 and 430 and the lock link portions 310 and 410. , Move backward (lock direction).

  Here, the case where the connection link 330 operates the lock link part 310 is demonstrated. By rotating the lock lever 340 counterclockwise, the sub lock link 315 rotates counterclockwise via the connecting link 330. As a result, the secondary lock link 315 is moved counterclockwise with respect to the secondary lock link 315 when the shaft 314 moves toward the shaft 312 in the elongated hole 316 and the inner portion of the locking projection 317 contacts the stopper pin 318. The movement in the rotating direction is promoted, and the main lock link 313 is rotated counterclockwise around the shaft 312.

  In addition, when the connection link 430 operates the lock link part 410, since the rotation direction of each member which comprises the lock link part 410 is only opposite to the lock link part 310, the detailed description is abbreviate | omitted.

  By moving the lock bars 320 and 420 in the backward direction (lock direction) as described above, the lock bars 320 and 420 are moved from the lock hole 114 of the hook plate 106 and the lock hole 214 of the hook plate 206 as shown in FIG. The sliding contact portions 116a and 216a are slidably pressed to press the hook plate 106 and the hook plate 206 downward.

  The backward movement (locking direction) of the lock bars 320 and 420 is performed until the engagement of the hook portions 112 and 212 of the hook plates 106 and 206 with respect to the anchor bar 38 is completed.

  10 shows a state in which the anchor bar 38 is completely engaged with the hook portion 212 of the hook plate 206 (wheelchair locked state). FIG. 12 shows that the anchor bar 38 has been engaged with the hook portion 112 of the hook plate 106. The state (wheelchair locked state) is shown. In this wheelchair locked state, the lock bars 320, 420 are tensioned in the direction of the arrow as shown in FIG. 4 by the torsion spring 344 wound around the shaft 342, and the hook portions 112, 212 of the hook plates 106, 206 The engagement with the anchor bar 38 is maintained.

  In FIG. 10, the lower side portion of the hook plate 206 is in contact with the base plate 12, whereas in FIG. 12, the lower side portion of the hook plate 106 is illustrated away from the base plate 12. ing. This is because the hook plates 106 and 206 have the same size, but in FIG. 12, the height h1 of the anchor bar 38 is higher than the height of the anchor bar 38 shown in FIG. . As described above, the height h1 of the anchor bar 38 is different because the weight of the person sitting on the wheelchair 20 is different, and the main wheel 32 of the wheelchair 20 is elastic according to the weight of the person. It is because it deforms.

  Here, when the deformation of the pair of left and right main wheels 32 is the same, the hook plates 112 and 212 change the swing angle according to the height of the anchor bar 38, that is, follow the hook plates 112 and 212. Lock with. At this time, as shown in FIGS. 14 and 15, the lock bars 320, 420 pressed by the lock bars 320, 420 urged by the torsion spring 344 or the like are slidably contacted according to the height of the anchor bar 38. The sliding contact position with respect to the parts 116a and 216a changes. Even if the sliding contact positions of the lock bars 320 and 420 with respect to the sliding contact portions 116a and 216a are displaced, the tangent angle α of the concave surface at the contact point (contact point P) of the lock bar 320 is constant. 420, the anchor bar 38 can be stably locked and held with the same holding force.

  Further, even when the deformation of the pair of left and right main wheels 32 is different, even when the heights of the portions of the anchor bar 38 to which the hook portions 112 and 212 of the hook plates 106 and 206 are locked are different from each other. By using both lock bars 320 and 420, each part of the anchor bar 38 can be stably locked and held with the same holding force.

<3. Unlock>
Next, the case where the wheelchair fixing device 10 is unlocked will be described.
As shown in FIG. 7, when the operation lever 510 is in the “wheelchair lock operation position”, the front operation member 512 (operation lever 510) is moved against the fixed shaft 18 against the urging force of the urging spring 524. The guide pin 518 is removed from the locking portion 16b by rotating in the clockwise direction. As shown in FIG. 8, thereafter, the operation lever 510 is moved to the “unlock operation position” against the urging force of the urging spring 522 and the torsion spring 344 wound around the shaft 342.

  As a result of this operation, as shown in FIG. 5, the operation lever 510 moves forward, and the pair of engaging members 540 place the lock lever 340 and the lock lever 440 in the urging force accumulating position via the engagement pins 346. .

  By this rotation of the lock levers 340 and 440, the lock bars 320 and 420 are operated in the forward direction (unlock direction) via the connecting links 330 and 430. Due to the movement of the lock bars 320 and 420 in the unlocking direction, the downward restraint of the hook plates 106 and 206 is released. At the same time, as shown in FIGS. 5 and 10, the push-up members 840 and 850 are moved to the hook plates 106 and 206 by the forward movement of the front operation member 512 (operation lever 510) to the “unlock operation position”. The pushed upper parts 820 and 810 are pushed up. As a result, the anchor bar 38 engaged with the hook portions 112 and 212 of the hook plates 106 and 206 is released. In this state, the wheelchair 20 is removed from the wheelchair fixing device 10 by moving the wheelchair 20 backward.

  Here, when the anchor bar 38 of the wheelchair 20 is removed from the wheelchair fixing device 10, the operation lever 510 is positioned at the “lock release operation position” shown in FIG. 8. For this reason, as shown in FIG. 11, the interlock members 620 and 720 are locked to the base plate 12 on the rear side of the lock plate 710 by the biasing force of a torsion spring (not shown) wound around the shafts 611 and 711. Abut.

  Thereafter, when the front operation member 512 (operation lever 510) is moved backward to return to the “wheelchair waiting operation position” shown in FIG. 9, the interlock holes 612 and 712 are engaged with the lock pieces 624 and 724. Return to a possible position. As a result, the locking pieces 624 and 724 of the interlock members 620 and 720 are engaged with the interlock holes 612 and 712 of the lock plates 610 and 710 by the biasing of a torsion spring (not shown) wound around the shafts 611 and 711. To do. Thus, the wheelchair fixing device 10 returns to the wheelchair waiting state when the hook devices 100 and 200 are unlocked.

This embodiment has the following features.
(1) The wheelchair fixing device 10 is pivotally supported so that the base end is swingable in the vertical direction, and when the upper direction is the locking direction and the lower direction is the anti-locking direction, Of these, hook plates 106 and 206 (hook members) having hook portions 112 and 212 for latching an anchor bar 38 (locked member) of a wheelchair are provided on the lower side of the lock direction side. The hook plates 106 and 206 are provided with sliding portions 116a and 216a on a part of the lower inner peripheral surfaces 116 and 216 of the lock holes 114 and 214 extending from the proximal end side toward the distal end side. The wheelchair fixing device 10 includes lock bars 320 and 420 (lock members). The lock bars 320 and 420 (lock members) are slidably slidably contacted with the sliding contact portions 116a and 216a of the lock holes 114 and 214, and the swing angle of the hook plates 106 and 206 is changed each time the sliding contact position changes. And the hook plates 106 and 206 (hook members) are always urged in the locking direction via the sliding contact portions 116a and 216a. As a result, even if the height of the locked member provided in the wheelchair changes, the hook plates 106 and 206 follow and change the swing angle, thereby achieving an effect that can be stably locked.

  (2) The wheelchair fixing apparatus 10 of the present embodiment is formed with elongated lock holes 114 and 214 extending from the proximal end side toward the distal end side in the hook plates 106 and 206 (hook members). Further, the sliding contact portions 116 a and 216 a are provided on the lower inner peripheral surface 116 of the lock holes 114 and 214.

As a result, even when the sliding contact portion is a part of the lower inner peripheral surface of the lock holes 114 and 214 of the hook plates 106 and 206, the effect (1) can be easily realized.
(3) The sliding contact portions 116a and 216a of the present embodiment have concave curved surfaces, and the tangent angle α with respect to the concave curved surfaces is constant even when the sliding contact positions of the lock bars 320 and 420 (locking members) are displaced. Is formed. As a result, even if the height of the anchor bar 38 is different, the anchor bar 38 (locked member) can be stably locked and held with the same holding force by the lock bars 320 and 420 (lock member).

  (4) In this embodiment, a pair of a combination of a hook plate as a hook member and a lock bar as a lock member is provided. As a result, the wheelchair can be stably locked even if the portions of the anchor bar as the locked member have different heights.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
In the above embodiment, the interlock holes 612 and 712 are disposed in the lock plates 610 and 710 and the lock pieces 624 and 724 are provided in the interlock members 620 and 720. However, the reverse relationship may be employed. That is, an interlock hole may be provided in the interlock member 720, and a lock piece may be provided in the lock plate 710 so as to be able to engage with the interlock hole.

  In the above-described embodiment, the number of hook devices is two. However, the number of hook devices is not limited to two. A single device or three or more hook devices may be provided. When three or more hook devices are provided, a lock mechanism is provided so as to correspond to each hook device.

When a plurality of hook devices are provided, the wheelchair can be fixed in a stable state by fixing and locking the wheelchair with the plurality of hook devices.
Moreover, when providing a some hook apparatus, you may shift and arrange | position in the front-back direction. In this case, the plurality of anchor bars 38 are arranged on the wheelchair 20 so as to be locked by the respective hook devices, or in the case of a single anchor bar, there are portions to be locked to the respective hook devices. As such, the shape of the anchor bar may be changed.

  In the above-described embodiment, the reciprocating track of the lock bar 320 reciprocates in the front-rear direction along the horizontal line. However, the reciprocating track is not necessarily limited to being along the horizontal line. For example, it may be in the front-rear direction and inclined with respect to the horizon. In this case, the lower inner peripheral surface of the lock hole of the hook plate only needs to extend in the front-rear direction and the intersecting direction with respect to the reciprocating track.

  In the above-described embodiment, the upper inner peripheral surfaces 118a and 120a of the through holes 118 and 120 have the same height and are arranged horizontally, but are not limited to being horizontal. In a state where the hook portion 112 of the hook plate 106 shown in FIG. 12 is engaged with the anchor bar 38, the hook plate 112 may be formed obliquely so as to be positioned below the upper inner peripheral surface 117 of the lock hole 114.

In the embodiment, the inner plates 104 and 204 may be omitted.
In the embodiment, the outer plate 102 may be replaced with the installation position of the inner plate 104 and the outer plate 202 may be replaced with the installation position of the inner plate 204. In this case, the outer plate exchanged at the installation position of the inner plates 104 and 204 becomes a new inner plate, and this new inner plate has a stopper surface.

  In the above-described embodiment, the wheelchair fixing device 10 is arranged on the vehicle compartment floor so that the wheelchair 20 fixed to the wheelchair fixing device 10 has the forward movement of the vehicle as the entry direction and the rear as the anti-intrusion direction. It is not limited to. With reference to the vehicle, the wheelchair fixing device 10 may be installed in the vehicle with one direction as the intrusion direction and the opposite direction as the anti-intrusion direction.

  For example, the intrusion direction may be the rear direction and the anti-intrusion direction may be the front direction. Further, the wheelchair fixing device 10 may be arranged on the passenger compartment floor so that the wheelchair 20 fixed to the wheelchair fixing device 10 has the rightward movement of the vehicle as the entry direction and the left as the anti-intrusion direction. On the contrary, the wheelchair fixing device 10 is arranged on the passenger compartment floor so that the movement of the wheelchair 20 fixed to the wheelchair fixing device 10 is the intrusion direction and the right side is the anti-intrusion direction. Also good.

  In the above-described embodiment, the long hole is formed as the lock hole. However, the upper part of the lock holes 114 and 214 of the outer plates 102 and 202 may be open. In this case, for example, the upper inner peripheral surface 120a of the through hole 120 of the inner plate 104 and the upper inner peripheral surface of the through hole 220 are formed in the same manner as in the above embodiment.

  In the above-described embodiment, the locking direction is the downward direction, and the counter-locking direction is the upward direction. However, the direction is not limited to the direction exemplified in this embodiment. For example, the locking direction may be upward and the anti-locking direction may be downward. When the locking direction is upward, the upper inner peripheral surfaces 117 and 217 of the lock holes 114 and 214 correspond to the sliding contact portions.

  In the above-described embodiment, the lock bars 320 and 420 are reciprocally moved via the link. However, the lock bars 320 and 420 may be provided on a slider that is movably supported in the front-rear direction. Then, an urging member, for example, a spring or the like is hooked on the slider, and the urging member always presses the sliding contact portion via the lock bars 320, 420, for example, the above embodiment. In this case, the configuration may be such that it moves backward.

  In the above embodiment, the sliding contact portion has a concave curved surface so as to have a constant radius of curvature. However, the sliding contact portion may be formed in an oblique shape. Alternatively, the sliding contact portion may be formed by connecting portions having different radii of curvature.

  Moreover, in the said embodiment, although the lock bar which slidably contacts with a sliding contact part was made into circular cross section, you may form only the site | part which contacts the sliding contact part in circular arc shape.

DESCRIPTION OF SYMBOLS 10 ... Wheelchair fixing device, 12 ... Base board, 14 ... Installation area, 14a ... Hole,
16 ... Mounting plate, 16a ... Guide hole, 16b ... Locking part, 18 ... Fixed shaft,
20 ... wheelchair, 22 ... frame, 24 ... sitting part, 26 ... backrest,
28 ... armrest, 30 ... step, 32 ... main wheel, 34 ... auxiliary wheel,
36 ... Grip, 38 ... Anchor bar (locked member), 38a ... Connection part,
DESCRIPTION OF SYMBOLS 100 ... Hook apparatus, 102 ... Outer plate, 102a ... Stopper surface,
104 ... Inner plate, 106 ... Hook plate (hook member),
108 ... shaft 110 ... guide part 112 ... hook part
114: Lock hole, 116: Lower inner peripheral surface of the lock hole 114,
116a ... sliding contact portion, 116b ... concave, 117 ... upper inner peripheral surface of the lock hole 114, 118 ... through hole of the outer plate 102,
118a ... upper inner peripheral surface, 120 ... through hole of inner plate 104,
120a ... upper inner peripheral surface, 130 ... pushed upper part, 200 ... hook device,
202 ... Outer plate, 202a ... Stopper surface,
204 ... Inner plate, 206 ... Hook plate (hook member),
208 ... shaft, 210 ... guide part, 212 ... hook part,
214 ... Lock hole, 216 ... Lower inner peripheral surface of the lock hole 214,
216a ... sliding contact part, 216b ... concave part,
217 ... Upper inner peripheral surface of the lock hole 214,
218 ... the through hole of the outer plate 202,
220 ... the through hole of the inner plate 204,
230 ... pushed upper part, 300 ... lock mechanism, 310 ... lock link part,
312 ... axis, 313 ... main lock link, 314 ... axis,
315 ... sub lock link, 316 ... long hole, 317 ... locking projection,
318 ... stopper pin, 320 ... lock bar (lock member),
330 ... Link, 340 ... Lock lever, 342 ... Shaft,
344 ... Torsion spring, 346 ... Engagement pin, 400 ... Lock mechanism,
410 ... lock link part, 412 ... shaft, 413 ... main lock link,
414 ... shaft, 415 ... secondary lock link, 416 ... long hole, 417 ... locking projection,
418 ... stopper pin, 420 ... lock bar (lock member),
430 ... Connecting link, 440 ... Lock lever,
500 ... operation unit, 510 ... operation lever, 512 ... front operation member,
514: Rear operation member, 516 ... Guide hole, 518 ... Guide pin,
522, 524 ... biasing spring, 530 ... bracket,
540 ... engaging member (which constitutes a lock allowing portion together with the operation lever 510),
542 ... 1st contact surface, 544 ... 2nd contact surface,
550 ... Bracket, 600 ... Interlock mechanism,
610 ... Lock plate, 611 ... Shaft, 612 ... Interlock hole,
620 ... Interlock member, 622 ... Lever piece, 624 ... Lock piece,
700 ... Interlock mechanism, 710 ... Lock plate, 711 ... Shaft,
712 ... interlock hole, 720 ... interlock member,
722 ... lever piece, 723 ... engagement recess, 724 ... lock piece,
725 ... introduction part, 800 ... unlocking part, 810, 820 ... pushed upper part,
830 ... Bracket, 840, 850 ... Push-up member,
h: the height of the introduction portion 725 of the engagement recess 723,
h1 ... the height of the anchor bar 38 of the wheelchair 20, O ... the reference line, O1 ... the central axis,
L1: a line parallel to the moving direction of the lock bar 320, L2: a tangent, α: a tangent angle.

Claims (4)

When the base end is pivotally supported so as to be swingable in the vertical direction, and one of the vertical directions is set as the locking direction and the other is set as the counter-locking direction, the locking direction side of the upper and lower side portions is A wheelchair fixing device that includes a hook member having a hook portion that latches a locked member of a wheelchair on a side portion and fixes the wheelchair by the hook member,
The hook member has a sliding contact portion extending from the proximal end side toward the distal end side,
Each time the sliding contact position changes, the swing angle of the hook member is changed, and the hook member is always locked via the sliding contact portion. A wheelchair fixing device having a lock member biased so as to be pressed. The hook member is formed with an elongated lock hole extending from the proximal end side toward the distal end side,
The wheelchair fixing device according to claim 1, wherein the sliding contact portion is a lower inner peripheral surface or an upper inner peripheral surface of the lock hole. The sliding contact portion has a concave curved surface,
The wheelchair fixing according to claim 1 or 2, wherein a tangent angle at a contact point between the lock member and the concave curved surface is constant even when a sliding contact position with the lock member is displaced. apparatus.   The wheelchair fixing device according to any one of claims 1 to 3, comprising a plurality of combinations of the hook member and the lock member.

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