JP5107864B2 - Wheelchair wheel lock device - Google Patents

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 (for example, Patent Document 1). In this wheelchair, when the user sits down, the rear seat is pushed down. As a result, the brake wire is pushed down and the brake operation lever is pushed to release the brake. It rotates as a fulcrum, and as a result, the brake wire is pulled upward and the brake operation lever is pulled, so that the brake is applied.

JP 2003-153961 A

  The problem to be solved by the present invention is that the brake structure described above can be braked and released by operating the brake lever via the brake wire in conjunction with the movement of the seat. As the wire has grown over time, the amount of wire movement has to be constantly adjusted.

  The present invention solves the above-described problems, and the wheel lock device once attached to the wheelchair does not change its movement due to secular change and can be used with peace of mind. It is an object to provide a wheel lock device for a high wheelchair.

In order to solve the above-described problems, a wheel lock device for a wheelchair according to the present invention includes a disc fixed to a wheel and provided with an annular engagement hole around it, and a braking pin engaged with and disengaged from the engagement hole of the disc. It is comprised with the apparatus main body which locks the wheel of a wheelchair at the time of engagement, and is provided with the following requirements.
(A) The apparatus main body includes a support member fixed to the frame of the wheelchair, a rotation member that is supported by the support member and rotates up and down in conjunction with the vertical movement of the seat surface, and the rotation of the rotation member (B) The operating member is engaged with the brake pin and a first engaging portion projecting obliquely toward the operating member side of the support member. (C) When the seating surface is lowered and the rotating member is rotated downward, the operating member is moved downward to engage the roller with the first engaging portion. When riding, the actuating member is rotated in a direction away from the disk , and the brake pin is removed from the engagement hole of the disc. The support member is moved toward the actuating member side. The first engagement portion is provided with a second engagement portion that protrudes in a direction opposite to the tip. When the wheelchair is folded and the pivoting member pivots upward, the actuating member moves upward and the roller engages the second engaging portion, and the actuating member is moved to the disc. It is preferable that the brake pin is removed from the engagement hole of the disk .

Further, the apparatus main body is provided with a regulating member that regulates the movement of the braking pin, and the regulating member includes a hole part in which the braking pin can be projected and retracted, and a shutter capable of closing the hole part, At the time of regulation , the hole may be closed by the shutter so that the brake pin does not protrude toward the disk regardless of whether the rotating member is rotated.

  According to the invention of claim 1, the wheel can be locked and unlocked reliably by whether or not the user sits on the seat of the wheelchair, and compared with a conventional lock device that brakes the wheel using a wire. As the brakes do not change over time, there is no need for adjustment, so safety can be ensured over a long period of time.

  According to the second aspect of the present invention, when an empty wheelchair is moved in a state where no user is sitting on the wheelchair, if the wheelchair is folded, the pressing of the rotating member by the seat surface is released. And the actuating member moves upward, the roller engages with the second engagement portion, and the brake pin is removed from the engagement hole of the disk, so that the wheel locks automatically. The wheel lock is released by simply folding the wheelchair without the need to provide a separate unlocking device, so it is possible to pass through a narrow space, etc. Can be realized.

  According to the invention of claim 3, if it is not necessary to lock the wheel of the wheelchair, the movement of the brake pin can be regulated by the regulating member so as not to protrude to the disk side. Can realize a wheelchair that does not lock.

  FIG. 1 shows a perspective view of a wheelchair A to which a wheel lock device B of a wheelchair according to the present invention is applied. The wheel lock device (hereinafter referred to as a lock device) B of the wheelchair is a device fixed to a frame 1 of the wheelchair A. It is comprised by the main body 2 and the disk 4 fixed to the wheel 3 of the wheelchair A (refer FIG. 2).

  The apparatus main body 2 is supported by a support member 10 fixed to the frame 1 via a fixing member 5 fixed to the frame 1, and is supported at the upper end of the support member 10 by a support shaft 11 so as to be vertically rotatable and a spring. 12, a rotating member 13 biased to rotate upward, an operating member 15 attached to the lower surface of the rotating member 13 via a support shaft 14, and a lower portion of the operating member 15 And a braking pin 16 attached to the main body (see FIG. 3).

  A sensor arm 17 that is engaged with the back surface of the seat surface 6 is fixed to the rotating member 13. The sensor arm 17 includes a first sensor arm 17a and a second sensor arm 17b. The first sensor arm 17a is at the front portion of the seat surface 6, and the second sensor arm 22 is at the center of the seat surface 6. Even if the user sits at the front of the seating surface 6, the user can sense the movement of the seating surface 6 in the same manner as when sitting at the center of the seating surface.

  The actuating member 15 is formed to be bent in a substantially U shape, a roller 20 is attached to the upper part, and a rear end 16b of a braking pin 16 disposed so as to penetrate the support member 10 is supported to the lower part. Yes.

  The roller 20 is adapted to engage with an engaging portion 21 formed on the support member 10 when the operating member 15 is lowered or raised. The engaging portion 21 is composed of two engaging portions of a first engaging portion 22 and a second engaging portion 23 that project obliquely from the support member 10 toward the operating member 15 side. The engaging portion 22 and the second engaging portion 23 protrude in the direction in which the tips are opposite to each other, and are formed in a letter C shape in a side view (see FIG. 4).

  When the user sits in a wheelchair and the seat surface 6 is lowered, and the sensor arm 17 is pushed down by the seat surface 6 and pivots downward (see FIG. 5), the first engaging portion 22 is integrated with the sensor arm 17. It is formed at a position where the roller 20 is engaged when the rotating member 13 is rotated downward and the operating member 15 is lowered, and the second engaging portion 23 is a seat surface 6 when the wheelchair A is folded. Since the sensor arm 17 is released from the pressure, when the sensor arm 17 rotates upward until it is nearly vertical (see FIG. 6), the rotation member 13 is also rotated upward until it is nearly vertical. The roller 15 is formed at a position where the roller 15 is engaged when the member 15 is raised. When the roller 20 engages with the first engagement portion 22 or the second engagement portion 23, the operation member 15 causes the support shaft 14 to move. It is rotated in the direction away from the disk 4 in the center It has become way.

  The brake pin 16 has a rear end 16b penetrating the operating member 15, a fixing pin 25 is attached via a washer 24, and a front end 16a penetrating the guide hole 10a of the support member 10 and hitting the disk 4. Has been. The brake pin 16 is urged by a spring 26 disposed between the wall surface of the support member 10 and a washer 27 positioned by the fixed pin 28 so that the tip 16 a protrudes toward the disk 4. Corresponding to the formed engagement hole 8, the tip 16 a penetrates into the engagement hole 8.

  When the actuating member 15 rotates in a direction away from the support member 10, the brake pin 16 attached to the lower portion of the actuating member 15 is moved in a direction away from the disk as shown in FIG. .

  The disk 4 is disposed on the frame 1 side of the wheel 3 and the disk 7 is disposed on the shaft 3 side of the wheel 3 with spokes interposed therebetween, and the disk 4 is fixed to the wheel 3 by screwing the disk 7 to the disk 4. Be able to.

  A large number of engagement holes 8 are annularly arranged around the disk 4, and the size of the engagement holes 8 may be such that the tip 16a of the brake pin 16 described above can penetrate therethrough. .

  According to the locking device B having the above configuration, when the user sits on the wheelchair A, the seat surface 6 is lowered and the sensor arm 17 (the rotating member 13) is opposed to the spring 12 as shown in FIG. , The engaging plate 15 is lowered (see FIG. 5). When the engagement plate 15 descends, the roller 20 engages with and rides on the first engagement portion 22, so that the operation member 15 rotates outward (in the direction of arrow a) about the support shaft 14, and the support member 10, the braking pin 16 is moved away from the disk 4 against the spring 26, and the tip 16 a of the braking pin 16 is removed from the engagement hole 8 of the disk 4, Since the disk 4 is unlocked, the wheel 3 can be rotated, and the user can move the wheel 3 while sitting on the wheelchair A to move.

  On the other hand, when the user leaves the seat 6 of the wheelchair A, the push-down of the sensor arm 17 is released, so that the rotating member 13 is biased by the spring 12 and rotates upward as shown in FIG. Since the sensor arm 17 is in contact with the seat surface 6, the amount of rotation is limited. In this state, the operating member 15 is raised and the engagement between the roller 20 and the first engaging portion 22 is released, but does not rise until the second engaging portion 23 is engaged. Since the shaft 14 rotates counterclockwise around the shaft 14 and moves downward in a direction approaching the support member 10, the brake pin 16 is urged by the spring 26 and moves in a direction to contact the disk 4, thereby engaging the engagement hole. The tip 16 a of the braking pin 16 that faces 8 is immersed in the engagement hole 8.

  When the tip 16a of the brake pin 16 is inserted into the engagement hole 8, the rotation of the disk 4 is prevented, and as a result, the wheel 3 is also prevented from rotating, and the wheel 3 is locked. Thus, when the waist is lifted, the wheel 3 is automatically locked, and it is possible to prevent an accident that the wheelchair A starts to move freely and the user falls.

  Moreover, when a wheelchair that is not in use is stored or moved, as shown in FIG. 8, the seat surface 6 is greatly bent and the sensor arm 17 is not pressed by folding, so the sensor arm 17 (turn The moving member 13) is urged by the spring 12 and rotates further upward, and as shown in FIG. 6, the actuating member 15 further rises and the roller 20 rides on the second engaging portion 23. Since the actuating member 15 is rotated outwardly about the support shaft 14 and moves downward in a direction away from the support member 10, the brake pin 16 is forced to move away from the disk 4 against the spring 26. Thus, the tip 16a of the brake pin 16 comes out of the engagement hole 8 of the disc 4 and unlocks the disc 4, so that the wheel 3 can be rotated, and the special operation for releasing the lock simply by folding the wheelchair A is performed. It can be moved without the.

  As described above, whether or not the brake pin 16 is engaged with the engagement hole 8 of the disk 4 automatically depends on whether the user sits on or does not sit on the seat surface 6 of the wheelchair or whether the wheelchair is folded. It is selected, and the wheel 3 can be automatically locked and unlocked according to the mode of use without the user being aware of it.

  Moreover, since the wheel 3 can be securely locked and unlocked without using a wire, it is possible to avoid the inconvenience that the wire is stretched and needs to be adjusted over time.

  The fixing pin 25 described above may be constituted by a split pin so that it can be attached to and detached from the braking pin 16. As a result, the number of washers 24 can be freely set. Therefore, as shown in FIG. 9, the substantial length L of the brake pin 16 (from the front surface of the support member 10 to the brake pin 16) according to the number of washers 24. 16 to the tip 16a), the distance between the brake pin 16 and the disk 4 can be freely set according to the shape of the wheelchair A, and the brake pins 16 having different lengths are prepared. Therefore, it is possible to cope with various wheelchairs A without increasing the production efficiency.

  FIG. 10 shows another example of the apparatus main body 2, and the apparatus main body 2 is provided with a regulating member 30 that regulates the movement of the brake pin 16. The restricting member 30 is composed of a frame frame 31 and a shutter 31 formed in a U shape in plan view. The front ends of both side pieces of the frame frame 31 are fixed to the support member 10, and the brake pin 16 can be projected and retracted on the front surface. A hole 33 having a large size is formed, and a guide shaft 34 for holding the shutter 32 and an engagement shaft 35 for engaging with the shutter 32 are provided on both sides of the hole.

  The shutter 32 is a substantially rectangular plate member. A long hole 36 is formed obliquely in the longitudinal direction and an engaging recess 37 is formed in the front part. The long hole 36 is formed on a guide shaft 34 provided on the front surface of the frame frame 31. The front surface of the frame 31 is supported so as to be slidable. As shown in FIG. 11, the hole 33 is opened when slid to one side, and the engagement recess 37 is formed on the engagement shaft 35 when slid to the other side. The holes 33 are engaged to be in a horizontal state so that the hole 33 can be closed.

  When the movement of the brake pin 16 is restricted by the restriction member 30 described above, the brake pin 16 is in the state of the seat surface 6 by closing the hole 33 with the shutter 32 without making the brake pin 16 project from the hole 33. However, the wheel 3 is released from the locked state and can be moved freely even when no person is sitting on the wheelchair.

The perspective view which shows an example of the wheelchair which applied the wheel lock device of the wheelchair which concerns on this invention The perspective view explaining the state which attached the locking device to the wheelchair A perspective view explaining the configuration of the apparatus main body Explanatory drawing of the operating state of the device body when no person is sitting on the seat Explanatory drawing of the operating state of the device body when a person is sitting on the seat Explanatory drawing of the operating state of the device body when the wheelchair is folded Front view of a wheelchair with a person sitting on the seat Front view of a wheelchair in a folded state Explanatory drawing of the state in which the setting of the device body is changed The perspective view explaining the structure of the apparatus main body provided with the control member The perspective view explaining the state which controlled the control pin with the control member

DESCRIPTION OF SYMBOLS 1 Frame 2 Apparatus main body 3 Wheel 4 Disk 5 Fixing member 6 Seat surface 7 Disk 8 Engagement hole 10 Support member 13 Turning member 15 Actuation member 16 Brake pin 17 Sensor arm 20 Roller 21 Engagement part

Claims (3)

A disc fixed to the wheel and provided with an annular engagement hole in the periphery, and a device body that engages and disengages the brake pin with the engagement hole of the disc and locks the wheelchair wheel when engaged, A wheel lock device for a wheelchair comprising the following requirements:
(A) The apparatus main body includes a support member fixed to the frame of the wheelchair, a rotation member that is supported by the support member and rotates up and down in conjunction with the vertical movement of the seat surface, and the rotation of the rotation member (B) The operating member is engaged with the brake pin and a first engaging portion projecting obliquely toward the operating member side of the support member. with the provision a roller (c) the rotating member the seat face is lowered is rotated downward, the roller said actuating member is moved downward is engaged with the first engaging portion above When riding, the actuating member is rotated in a direction away from the disk, and the brake pin is removed from the engagement hole of the disk. The support member includes a second engagement portion projecting in a direction opposite to the tip of the first engagement portion toward the operation member, and the wheel member is folded to rotate the rotating member upward. When the actuator moves, when the roller moves upward and the roller engages with the second engaging portion, the actuator is rotated in a direction away from the disk, and the brake pin is The wheel lock device for a wheelchair according to claim 1, wherein the wheel lock device is withdrawn from the engagement hole of the disk . The apparatus main body is provided with a restricting member for restricting the movement of the brake pin, and the restricting member includes a hole part through which the brake pin can protrude and retract and a shutter capable of closing the hole part. 2. The wheel lock device for a wheelchair according to claim 1, wherein the shutter pin is closed by the shutter so that the brake pin does not protrude toward the disk regardless of whether the rotation member is rotated.

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