JP2011172799A - Wheel lock device, and wheel backstop for wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel lock device for a wheelchair, which can be installed regardless of the size or shape of the wheelchair, and of which installation work is facilitated. <P>SOLUTION: The wheel lock device B includes a drive mechanism 3 fixed to a frame 1 of the wheelchair A, and disposed on both sides of a seat surface 2, a disc 5 fixed to a wheel 4, and a lock mechanism 6 to lock the disc. The drive mechanism 3 includes a support member 10 fixed to the frame of the wheelchair, and a rotating member 12 supported by the support member 10 to interlock with vertical motion of the seat surface. On the rotating member 12, one end of an outer cable 22 is fixed, and the other end is extended to the lock mechanism 6. The lock mechanism 6 includes an engagement pin 41 which is engaged and released with/from an engagement hole 50 formed on the disc 5, and a frame 40 fixed to the wheelchair. One end of a wire 23 inserted to the outer cable 22 is fixed to the support member 10, and the other end is fixed to the engagement pin. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wheel lock device for a wheelchair, and more particularly to a wheel lock device for a wheelchair in which a wheel lock is automatically released when a user sits on a seat.

  Conventionally, when a user is using a wheelchair, the wheel rotates freely, and when getting off the wheelchair, the wheel is operated so that the wheelchair does not move freely, so that the wheel does not move and is separated. However, when you leave the wheelchair without inadvertently braking, if you stand up with the wheelchair supported, the wheelchair will start to move on its own and the user will fall, so when you leave the wheelchair, it will automatically A wheelchair to which a brake is applied has been proposed by the present applicant (Patent Document 1). This wheelchair is provided with an operating member that moves up and down in conjunction with the vertical movement of the seating surface, and an engaging plate is suspended from the lower surface of the operating member, and a disk attached to a wheel is provided on the outer surface of the engaging plate. An engagement shaft that engages and disengages is formed in the formed engagement hole, and the engagement plate rotates in a direction to engage the engagement shaft with the engagement hole of the disk when the operating member is moving upward. The engagement shaft is retracted from the engagement hole of the disk when the operating member is moving downward.

JP 2007-307348 A

  The problem to be solved by the present invention is that an operating plate that moves up and down in conjunction with the vertical movement of the seating surface is provided with an engaging plate, and this engaging plate is engaged with and disengaged from an engaging hole of a disc attached to a wheel. Since the engagement shaft is provided, and it is an integral structure, it cannot be flexibly adapted to wheelchairs of various sizes and shapes, and there is a problem that it does not operate depending on the position of sitting on the seat surface.

  This invention solves the said problem, and makes it a subject to propose the wheel lock device of the wheelchair which can be attached without being influenced by the magnitude | size and shape of a wheelchair, and made attachment work easy.

In order to solve the above problems, the wheel lock device for a wheelchair according to the present invention has the following requirements.
(A) The wheel lock device is fixed to a wheelchair frame and disposed on at least one of both side portions of the seating surface, a disk 5 fixed to the wheelchair wheel 4, and locks the disk. (B) The drive mechanism includes a support member fixed to the frame of the wheelchair, and a rotation member that is supported by the support member and that rotates up and down in conjunction with the vertical movement of the seat surface. One end of the outer cable is fixed to the rotating member, and the other end of the outer cable is fixed to the lock mechanism. (C) The lock mechanism is an engagement hole formed in the disk. (2) A wire is inserted into the outer cable, and the outer cable is inserted into the outer cable. One end of the wire drawn from table is fixed to the support member, the other end is fixed to the engaging pin

  A relay box is disposed between the drive mechanism and the lock mechanism, and the outer cable is disposed from the drive mechanism to the relay box, from the lock mechanism to the relay box, and the wire and the lock mechanism on the drive mechanism side. It is preferable that the wire on the side is connected by a binding member in the relay box.

  The wheelchair is provided with a lock release lever, and one end of a wire is fixed to the lock release lever. The other end of the wire is routed to the relay box and connected to the wire on the lock mechanism side by the binding member. Also good.

The wheel reversal prevention device for a wheelchair according to the present invention is characterized in that it has the following requirements for engaging and disengaging the engagement hole of the disk described in claim 1 to prevent the wheel from reversing.
(A) The wheel reverse rotation preventing device includes a ratchet pin that engages / disengages in the engagement hole of the disk, a reverse rotation prevention mechanism that includes a frame that slidably supports the ratchet pin and is fixed to the wheelchair, and a wheelchair frame. The operation lever and the ratchet pin are connected by a wire, and the ratchet pin is engaged with and disengaged from the engagement hole of the wheel by the operation of the operation lever. The tip is formed to protrude diagonally in the forward direction of the wheelchair

  The ratchet pin is preferably formed wider than the diameter of the engagement hole so that at least the tip of the ratchet pin does not enter the engagement hole of the disk.

  According to the first aspect of the present invention, since the entire seating surface can fulfill the function of the sensor, the lock mechanism can be operated reliably without being influenced by the sitting position or the sitting method. In addition, since the drive mechanism for detecting the state of the seat surface and the lock mechanism for locking the wheels are not an integral structure, it is possible to facilitate the retrofitting operation to the wheelchair.

  According to the invention of claim 2, since the wire on the drive mechanism side and the wire on the lock mechanism side are connected in the relay box, it is not necessary to directly connect the wire on the drive mechanism side to the lock mechanism, and the wire is easily routed. At the same time, both wheels can be unlocked.

  According to the invention of claim 3, since the wheel is unlocked by operating the lock release lever, the wheelchair can be moved even when the user is not sitting in the wheelchair, and the user's family and management A person or the like can easily manage the wheelchair.

  According to the invention of claim 4, since the wheelchair can be prevented from reverse running by operating the operation lever, when the user operates the wheelchair and travels on an uphill slope, the operation lever can be operated safely. It is possible to realize a wheelchair that can travel on the road.

  According to the invention of claim 5, since the tip of the ratchet pin does not immerse into the engagement hole of the disk, the anti-reverse mechanism can be attached to the wheelchair without adjusting the distance between the disk and the anti-reverse mechanism. Can be made easier.

The perspective view which shows an example of the wheelchair which applied the wheel lock device of the wheelchair which concerns on this invention Front view of the wheelchair (A) (b) is a perspective view explaining the structure of a drive mechanism. (A) and (b) are front views for explaining the configuration and operating state of the drive mechanism. The perspective view explaining the composition of a relay box (A) (b) is a front view explaining the movement of the wire when folding a wheelchair (A)-(c) is the perspective view and side view explaining the structure and operating state of a lever apparatus with a parking function The perspective view explaining the structure of a lock mechanism and a disk (A) (b) is a front view explaining the operating state of the locking mechanism Front view of the wheelchair folded The perspective view which shows the other example of the said wheelchair A perspective view explaining the structure of the reverse running prevention mechanism (A)-(c) is a top view explaining the relationship between a ratchet pin and a disk

  FIG. 1 is a perspective view of a wheelchair A to which a wheel lock device for a wheelchair according to the present invention is applied. A wheel lock device (hereinafter referred to as a lock device) B attached to the wheelchair A is a wheelchair as shown in FIG. A drive mechanism 3 that is fixed to the frame 1 of the A and disposed on both lower surfaces of the seat surface 2, a disk 5 that is fixed to each wheel 4 of the wheelchair A, and a lock mechanism 6 that locks the disk 5. It is configured.

  As shown in FIG. 3A, the drive mechanism 3 includes a support member 10 that is fixed to the frame 1 that supports both sides of the seating surface 2 by appropriate means such as screws, and a hinge 11 that is attached to the upper surface of the support member 10. And a rotating plate 12 attached so as to rotate in the vertical direction via the support member 10, and a projecting piece 13 protruding in a substantially L shape downward is formed on a part of the side surface of the support member 10. As shown in FIG. 3B, one end of a wire 23 to be described later is attached to the projecting piece 13 and one end of a spring 14 is attached.

  An arm 15 bent in a bowl shape is fixed to a portion corresponding to the protruding piece 13 of the rotating plate 12 by appropriate means such as welding, and the arm 15 moves up and down as the rotating plate 12 rotates. A support plate 16 is formed by bending the tip of the arm 15 so as to be positioned below the overhanging piece 13. The other end of the spring 14 is attached to the support plate 16. One end of an outer cable 22 which will be described later is fixed to the bottom surface side, and the rotating plate 12 is rotated upward with respect to the support member 10 around the hinge 11 by contraction of the spring 14.

  The wire 23 accommodated in the outer cable 22 is pulled out from the outer cable 22 so that the caulking 18 is fixed to the tip through the mounting hole 17 of the protruding piece 13 so that it does not come off from the protruding piece 13. (See FIG. 4 (a)).

  As shown in FIG. 2, a relay box 25 is attached below the seat surface 2 of the wheelchair A, and the other end of the outer cable 22 is fixed to the upper surface of the relay box 25. The wire 23 is drawn into the relay box 25 and connected to another wire 23 by a binding member 26 (see FIG. 5).

  5, reference numeral 22a denotes an outer cable from the left driving mechanism 3, 22b denotes an outer cable from the right driving mechanism 3, 22c denotes an outer cable from a plate 28 described later, and 22d denotes a lever with a parking function described later. The reference numeral 23a denotes a wire from the left drive mechanism 3, 23b denotes a wire from the right drive mechanism 3, 23c denotes a wire from a plate 28 described later, and 23d denotes a lever 31 with a parking function described later. Showing wire from.

  Reference numeral 22e denotes an outer cable from the left locking device 6, 22f denotes an outer cable from the right locking device 6, 23e denotes a wire from the left locking device 6, and 23f denotes a right locking device 6. Indicates a wire.

  Then, as shown in FIG. 6A, a plate 28 is fixed to the frame 27 that rotates when the wheelchair A is folded, and one end of the wire 23c is fixed to the front end of the plate 28. The other end of the wire 23c is drawn into the relay box 25 through the outer cable 22c having one end fixed to the box 29 fixed to the frame 1a, and is fixed integrally with the bundling member 26 together with the other wires (see FIG. 5).

  When the wheelchair is folded, as shown in FIG. 6B, the frame 27 is rotated upward, and the wire 23c fixed to the plate 28 that rotates integrally with the frame 27 is connected to the outer cable 22c. The wires 23c are pulled together, and wires 23e and 23f on the side of the lock device 6 (to be described later) connected to the wire 23c by a binding member 26 in the relay box are pulled together.

  Further, a lever device 31 with a parking function (hereinafter referred to as a lever device) 31 is attached to the handle 30 (see FIG. 1). As shown in FIGS. 7A and 7B, the lever device 31 is supported by a lever device main body 32 so that a lever 33 can be pivoted up and down by a support shaft 34, and is always pivoted downward by a spring (not shown). When the lever 33 is lifted by grasping the handle 30 and pivoted upward, the lifted state is maintained by the lock button 35, and one end of the wire 23 d is crimped to the lever 33. When the lever 33 is gripped, the support shaft 34 is pivoted about the fulcrum, and the wire 23 is pulled as shown in FIG. 7C. When the lock button 35 is pushed in, the lever 33 This is composed of a known parking function lever in which the rotating state is maintained and the state where the wire 23d is pulled is maintained, and the lever 33 is returned to the original state when the lock button 35 is pulled out. To have.

  The lock mechanism B includes a support frame 40 that is fixed to the wheelchair frame 1 by an appropriate method, and an engagement pin 41 that is slidably attached to the support frame 40 back and forth (see FIG. 8). When the engaging pin 41 protrudes forward until one end of the wire 23 (23 a, 23 b) is fixed to the rear end and is biased by the spring 42 until the locking pin 43 contacts the front plate 44 of the support frame 40. 5 (see FIG. 9A), when the wire 23 is pulled, the engagement pin 41 is forcibly retracted against the spring 42. The tip is removed from the engagement hole of the disk 5 (see FIG. 9B). The other end of the wire 23 passes through the outer cable 22 and is drawn into the relay box 25 from the lower surface of the relay box 25 described above, and is connected to another wire 23 by a binding member 26.

  As shown in FIG. 8, the disk 5 is composed of a metal disk having a large number of engagement holes 50 formed in the circumferential direction on the outer peripheral side. The disk 5 is disposed on the frame side of the wheel 4 on the fixed disk 7 (7a, The disk 5 is fixed to the wheel 4 by setting 7b) on the shaft part side of the wheel 4 with the spoke interposed therebetween and screwing the fixed disk 7 to the disk 5.

  According to the locking device having the above-described configuration, as shown in FIG. 4B, when the user sits on the wheelchair, the seat surface 2 is lowered, and the rotating plate 12 is moved downward about the hinge 11 against the spring 14. Since it rotates, the arm 15 descends. When the arm 15 is lowered, the outer cable 22 fixed to the support piece 16 is also pushed down. When the outer cable 22 is pushed down, the wire 23 is also pushed down, but one end of the wire 23 is fixed to the overhanging piece 13 of the support member 10 with the caulking 18 so that the other end of the wire 23 is drawn. .

  Since the other end of the wire 23 (23a, 23b) is connected to the wire 23 (23e, 23f) of the engaging pin 41 by the bundling member 26 in the relay box 25, the wires 23e, 23f are simultaneously drawn, and this wire As shown in FIG. 9B, the front end of the engagement pin 41 is retracted from the engagement hole 50 of the disk 5, and the engagement pin 41 fixed to 23 is also attracted against the spring 42. Since the disk 5 is unlocked, the wheel 4 can rotate, and the user can move the wheel 4 while sitting in a wheelchair.

  On the other hand, when the user leaves the seat surface 2 of the wheelchair, as shown in FIG. 4A, the rotating plate 12 rotates upward about the hinge 11 by the contraction force of the spring 14. Accordingly, the push-down of the wire 23 is also released, so that the engagement pin 41 is pushed forward by the spring 42 and the tip 41a of the engagement pin 41 is engaged with the engagement hole 50 of the disk 5. (See FIG. 9A). When the tip 41a of the engagement pin 41 is engaged with the engagement hole 50, the rotation of the disk 5 is prevented and as a result, the rotation of the wheel 4 is also prevented. Therefore, when the user leaves the wheelchair, the wheel 4 automatically. Can be prevented before the wheelchair is automatically locked and the user falls.

  As described above, whether or not the engagement pin 41 is engaged with the engagement hole 50 of the disk 5 is automatically selected depending on whether or not the user is seated on the seat surface 2 of the wheelchair, and the user is conscious. It is possible to automatically lock and unlock the wheels 4 without doing so.

  Also, as shown in FIG. 10, when the wheelchair A is folded, the frame 27 rotates upward, so that the plate 28 fixed to the frame 27 also rotates counterclockwise as shown in FIG. 6B. The wire 23c fixed to the plate 28 is pulled so as to be pulled out from the outer cable 22c, and the wire 23 (23e on the lock device 6 side described later) connected to the wire 23c by a binding member 26 in the relay box. 23f) are simultaneously pulled, and as shown in FIG. 9 (b), the tip of the engagement pin 41 is retracted from the engagement hole 50 of the disk 5, and the lock of the disk 5 is released. When the wheelchair A is moved by the user's family or administrator, the wheel 4 is unlocked simply by folding the wheelchair. It can easily be moved wheelchair.

  In addition, since the wheel 4 is locked when the user is not sitting in the wheelchair, when the administrator or family moves the wheelchair A, if the wire 23d is pulled by operating the lever 31, the tip of the wire 23d is moved. Is connected to another wire in the relay box 25, so that the wire 23d of the lever 33 is connected to the wire 23 (23e, 23f on the lock mechanism side) even if the wire 23 (23a, 23b) of the drive mechanism 3 is not pulled. ) Is pulled, the engaging pin 41 fixed to the tip of the wire is pulled against the spring 42, and the tip 41a of the engaging pin 41 is retracted from the engaging hole 50 of the disk 5, and the disk Since the lock 5 is released, the wheel 4 can be rotated, and the wheelchair can be moved even if the user is not sitting on the wheelchair.

  FIG. 11 shows a wheelchair A provided with a wheel reversal prevention device C for preventing the wheel 4 from reversing when the user sits on the wheelchair and travels independently without care. As shown in FIG. 12, a ratchet pin 60 that engages and disengages with the engagement hole 50 of the disk 5, and a reverse rotation prevention mechanism 62 that includes a support frame 61 that slidably supports the ratchet pin 60 and is fixed to the wheelchair A. And an operation lever 63 (see FIG. 11).

  The operation lever 63 should just be comprised with the operation lever equivalent to the lever apparatus 31 with a parking function mentioned above. The operation lever 63 is configured such that when the lever 64 is pulled, the wire 66 in the outer cable 65 is pulled. When the lock button 67 is pushed, the lever 64 is maintained in a rotating state and the wire 66 is pulled. The state is maintained, and when the lock button 67 is pulled out, the lever 64 returns to the original state and the pull of the wire 66 is released.

  On the other hand, the reverse rotation prevention mechanism 62 is formed in the same manner as the frame 40 of the lock mechanism 6 described above, and the ratchet pin 60 that is slidable back and forth on the support frame 61 fixed to the wheelchair is slidable back and forth. It is a thing. The ratchet pin 60 is formed so that the tip 60a protrudes obliquely with respect to the traveling direction of the wheelchair, and the rear end of the slope protrudes sideways so that the ratchet pin 60 does not enter the engagement hole 50 of the disk 5. An overhang portion 60b is formed. In addition, the width of the ratchet pin may be formed wider than the diameter of the engagement hole 50 of the disk 5.

  Then, one end of the wire 66 is fixed to the rear end of the ratchet pin 60, and when it is biased by the spring 68 and protrudes forward until the locking pin 69 contacts the front plate 61a of the support frame 61, the disk 5 is engaged. The tip 60a is engaged with the hole 50 (see FIG. 13B). When the wire 66 is pulled, the ratchet pin 60 is forcibly retracted against the spring 68, and the engagement of the disk 5 is increased. The tip 60a is removed from the joint hole 50 (see FIG. 13A). The other end of the wire 66 is connected to the lever 64 of the operation lever 63 through the outer cable 65 (see FIG. 11).

  According to the wheel reverse rotation preventing device C having the above-described configuration, when sitting on the seat surface 2, as shown in FIG. 13A, the engagement pin 41 is pulled by the wire 23 and the tip is the engagement hole 50 of the disk 5. When the operating lever 63 is pulled, the ratchet pin 60 is also pulled against the spring 68 and the tip 60a is retracted from the engagement hole 50 of the disk 5. Therefore, the disk 5 is in a state in which it can rotate in any of the forward direction (arrow a direction) and the backward direction (arrow b direction) of the wheelchair.

  Then, when the lock button 67 of the operation lever 63 is operated to release the locked state of the lever 64, the release of the ratchet pin 60 is released, so that the ratchet pin 60 is urged by the spring 68 to the disk 5 side. It protrudes and it will be in the state which the front-end | tip 60a engages with the engagement hole 50. FIG. In this state, as shown in FIG. 13B, the overhanging portion 60 b contacts the side surface of the disk 5, and the ratchet pin 60 does not enter the engagement hole 50. In this state, the disk 5 is blocked by the ratchet pin 60 and cannot rotate in the backward direction (arrow b direction). That is, the wheel to which the disk 5 is attached cannot rotate in the backward direction.

  On the other hand, since the tip of the ratchet pin 60 is formed so as to protrude obliquely in the forward direction of the wheelchair, when the disk 5 rotates in the forward direction (arrow a direction) (the wheelchair advances), the state shown in FIG. As shown, since the disk 5 can rotate while the engagement hole 50 pushes back the ratchet pin 60, the wheel to which the disk 5 is attached can be rotated in the forward direction.

  As described above, when the wheelchair is moved while the user is sitting on the wheelchair, if the ratchet pin 60 is retracted from the engagement hole 50 of the disk 5 (see FIG. 13A), the wheelchair is moved. Can be moved both forward and backward, but in a state where the ratchet pin 60 is engaged with the engagement hole 50 of the disk 5, the rotation direction of the disk 5 can be restricted (rotation in the reverse direction is prevented). (See FIG. 13B), when the user moves the wheelchair alone, it is possible to prevent the wheelchair from running backward on the uphill, and the operation lever 63 even if the traveling surface is inclined. It is possible to realize a wheelchair that can be safely driven by performing the above operation.

  In the above-described wheel reversal prevention mechanism, the case where the lock mechanism (engagement pin) for locking the disk is integrally incorporated in the same support frame 61 has been described. However, the support frame constituting the wheel reversal prevention mechanism is a ratchet pin. You may comprise by the support frame which supports independently.

DESCRIPTION OF SYMBOLS 1 Frame 2 Seat surface 3 Drive mechanism 4 Wheel 5 Disc 6 Lock mechanism 10 Support member 12 Rotating member 22 Outer cable 23 Wire 41 Engagement pin 50 Engagement hole 60 Ratchet pin 62 Reverse rotation prevention mechanism A Wheelchair B Wheel lock device C Wheel Reversal prevention device

Claims (5)

A wheel lock device for a wheelchair comprising the following requirements:
(A) The wheel lock device is fixed to a wheelchair frame and disposed on at least one of both sides of the seat surface, a disk fixed to a wheelchair wheel, and a lock mechanism for locking the disk (B) The drive mechanism is composed of a support member fixed to the wheelchair frame and a rotating member that is supported by the support member and rotates up and down in conjunction with the up and down of the seating surface. One end of the outer cable is fixed to the rotating member, and the other end of the outer cable is disposed up to the lock mechanism. (C) An engagement hole is provided in the circumferential direction on the outer peripheral side of the disk. The lock mechanism is formed in large numbers, and is configured by an engagement pin that detaches from an engagement hole formed in the disk, and a frame that slidably supports the engagement pin and is fixed to the wheelchair ( 2) Above a The terpolymer cable is inserted a wire, the end of the wire drawn from the outer cable is fixed to the support member, the other end is fixed to the engaging pin   A relay box is disposed between the drive mechanism and the lock mechanism, and the outer cable is disposed from the drive mechanism to the relay box and from the lock mechanism to the relay box. The wheel lock device for a wheelchair according to claim 1, wherein the wire on the lock mechanism side is connected by a binding member in the relay box.   The wheelchair is provided with a lock release lever, and one end of a wire is fixed to the lock release lever, and the other end of the wire is routed to the relay box and connected to the wire on the lock mechanism side by the binding member. 2. Wheelchair wheel locking device according to 2. A wheel reversal prevention device for a wheelchair comprising:
(A) The wheel reverse rotation preventing device includes a ratchet pin that engages / disengages in the engagement hole of the disk, a reverse rotation prevention mechanism that includes a frame that slidably supports the ratchet pin and is fixed to the wheelchair, and a wheelchair frame. The operation lever and the ratchet pin are connected by a wire, and the ratchet pin is engaged with and disengaged from the engagement hole of the wheel by the operation of the operation lever. The tip is formed to protrude diagonally in the forward direction of the wheelchair   The wheelchair wheel reversal prevention device according to claim 4, wherein the ratchet pin is formed wider than the diameter of the engagement hole so that at least a tip of the ratchet pin does not enter the engagement hole of the disk.

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