JP4733487B2 - Footrest connection member - Google Patents

Description

The present invention relates to a footrest connecting member that is attached to a front frame of a wheelchair to support a footrest and to adjust the angle of the footrest.

As a method for attaching the footrest to the wheelchair, there is a method of protruding the footrest support frame 32 from the front frame 31 of the wheelchair 30 and attaching the footrest 33 to the tip thereof as shown in FIG. However, in this method, since the footrest support frame 32 is directly attached to the front frame 31, the angle and height of the footrest 33 cannot be adjusted according to the symptoms of the wheelchair user. Therefore, various footrests that can be adjusted according to the symptoms of the wheelchair user have been devised.

  In Patent Document 1, the footrest is a mounting structure for a footrest in a wheelchair configured to be attached to a mounting shaft extending substantially vertically forward from the lower end of the leg pipe, and the sleeve portion through which the mounting shaft is inserted. The sleeve portion is externally mounted on the mounting shaft so as to be rotatable in the circumferential direction of the mounting shaft, and a stopper member externally mounted on the mounting shaft is disposed in the vicinity of the sleeve portion. The stopper member is attached to the attachment shaft so as to be rotatable and fixable in the circumferential direction, and includes a stopper portion that regulates the rotation position of the footrest at a foot support position. A structure for mounting a footrest in a wheelchair characterized by being configured is disclosed.

  In Patent Document 2, a shaft rod is inserted into a footrest support post whose upper end is obliquely cut, and a fixing nut whose lower end is obliquely cut is screwed into the upper end screw groove portion of the shaft rod. A cam lever having a cam shape is pivotally attached to the root end, and the footrest support post is inserted into a pipe-shaped footrest support beam inserted from a wheelchair body, and the cam shape is rotated by rotating the cam lever. The footrest support post is fixed by pressing the lower end of the footrest support post, and the side surface of the footrest support post and the side surface of the fixing nut are pressed against the inner peripheral wall of the pipe-shaped footrest support beam, respectively. A structure is disclosed.

  In Patent Document 3, a footrest is provided on an upper side of a member that supports the footrest via an elastic member. The footrest has the elastic member as a fulcrum and rotates up and down in the front-rear direction against the elastic force of the elastic member. A support device for a footrest in a chair, characterized in that it can be moved is disclosed.

As described above, Patent Document 1 has a footrest mounting structure in a wheelchair that allows easy angle adjustment with respect to the circumferential direction of the mounting shaft. In patent document 2, it is a footrest attachment structure which can adjust a position easily. Patent Document 3 discloses a footrest support device that can adjust the vertical angle of the footrest in the front-rear direction to the angle of the occupant's foot. However, there is no supporting structure for the footrest that can easily adjust the height of the footrest according to the symptoms of the occupant sitting on the wheelchair, and its appearance is desired.
JP 2001-238918 A JP 2003-135532 A JP 2004-208802 A

The present invention is to provide a footrest connecting member for a wheelchair that can easily adjust the height of the footrest in accordance with the symptoms of a wheelchair occupant.

As a result of intensive studies to solve the above-mentioned problems, a footrest connection member, a support frame receiving member for fitting the footrest support frame to the footrest connection member, and an adjustment frame are pivotally attached to form a strong footrest connection member. I was able to.

According to the first aspect of the present invention, the upper fitting portion 14 and the lower fitting that are rotatably inserted into the fitting holes 24a and 24b provided in the front frame 24 of the wheelchair and can be inserted and removed are provided at the rear portion. Adjustment that is slidably inserted into the upper shaft mounting portion 12 and the footrest support frame 20 that pivotally mounts a support frame receiving member 19 having a support frame insertion hole 18 in the front portion. A footrest connecting member 100 having a lower shaft mounting portion 13 for axially mounting a frame 21, wherein the footrest support frame 20 is inserted into a support frame insertion hole 18 of the support frame receiving member 19 and protrudes from an adjustment hole 17. The footrest can be adjusted by pressing the head 21a of the engaging member and moving the support frame receiving member 19 of the adjusting frame 21 up and down. A connection member. A support frame receiving member at the upper part of the footrest connecting member, two upper and lower points of the footrest connecting member with one end of the adjusting frame pivotally attached to the lower part of the supporting frame receiving member, and the other end of the adjusting frame in the supporting frame receiving member The footrest support frame can be firmly supported at the three points fixed by the adjustment holes.

The invention according to claim 2 is the footrest connecting member according to claim 1 , wherein the adjustment of the angle of the support frame receiving member 19 is an adjustment frame 21 having a mechanical lock mechanism biased by a spring. . The adjustment frame can be adjusted to a certain angle by using a mechanical lock mechanism in which a spring is urged to the adjustment frame inserted into the footrest support frame attached to the support frame receiving member. By the angle adjusting frame, you can easily change the angle of the footrest support frame, releasing the head of the engaging member at an arbitrary position push or pull the head of the engaging member, the angle of the footrest support frame Can be fixed at any position.

  A support frame receiving member at the upper part of the footrest connecting member, and an adjustment frame fitted into the footrest supporting frame at the lower part of the footrest connecting member, and two support points, the upper and lower parts of the footrest connecting member, and a support in which the adjusting frame is fixed The footrest support frame can be firmly supported at three points in the middle of the frame receiving member. The fixing position of the footrest support frame can be easily adjusted by using an adjustment frame fitted to the footrest support frame fitted to the support frame receiving member as a mechanical lock mechanism biased by a spring.

  FIG. 1 shows a footrest connecting member 100. In FIG. 1, the upper fitting part 14 and the lower fitting part 15 of the main body 11 of the footrest connecting member are rotatably fitted in fitting holes provided in the front frame of the wheelchair. The footrest connecting member 100 can be freely rotated on the front frame of the wheelchair, and can be inserted and removed. The method of attaching the footrest connecting member 100 to the front frame of the wheelchair is not limited to the method of fitting the fitting portion into the fitting hole as in the present method, as long as it is a structure that rotates left and right, For example, a method using a hinge or the like may be used.

  The upper shaft mounting portion 12 rotatably supports the support frame receiving member 19. The lower shaft attachment portion 13 is attached to an adjustment frame 21 that is slidably inserted into the footrest support frame 20. The locking groove 16 is a groove into which a locking piece for fitting the footrest connecting member 100 to the front frame of the wheelchair and fixing the footrest mounted on the front frame is fitted. While the footrest connecting member 100 is fixed by this locking piece during use of the wheelchair, when the user gets on and off, the footrest connecting member 100 is positioned on both sides of the wheelchair at the positions of the fitting portions 14 and 15 of the footrest connecting member. It becomes easier to get on and off by opening the door.

  FIG. 2 is a perspective view from the front side of the footrest connecting member 100. There is a support frame insertion hole 18 into which the support frame is inserted in front of the support frame receiving member 19 that is pivotally attached to the footrest connecting member 100, and the support frame 20 is inserted and fitted therein. One end of the adjustment frame 21 is fitted into the support frame insertion hole 18 and is slidably mounted on the lower shaft mounting portion 13. The adjustment hole 17 of the support frame receiving member 19 projects from the head of the engagement member of the adjustment frame that is slidably mounted in order to adjust and fix the length. The head of the engaging member of the adjustment frame 21 utilizes a mechanical lock mechanism in which a spring is urged. By pressing the head of this engaging member, the fixing of the adjusting frame 21 is released, and the support frame receiving member 19 can be adjusted up and down. The use of a mechanical lock mechanism in which a spring is biased to fix the adjustment frame 21 only has to be pushed by the head of the engaging member, and there is an advantage that anyone can handle it because a large force is not required. The adjustment of the adjustment frame 21 and the adjustment of the length are not necessarily limited to the mechanical lock mechanism, and any method may be used as long as the adjustment frame 21 is fixed. A fixing method can be exemplified.

  FIG. 3 shows a state in which the support frame 20 and the adjustment frame 21 are slidably inserted from the support frame insertion hole 18 (see FIG. 2) at the tip of the support frame receiving member 19. The head of the engagement member using a mechanical lock mechanism biased by a spring projects into the adjustment hole 17 at the lower end of the support frame receiving member 19. When the head of the engagement member protruding from the adjustment hole 17 is pushed, the adjustment frame 21 is released from the fixed state, and the support frame receiving member 19 can be moved up and down. When the head of the engaging member is released at an arbitrary position, the adjustment frame 21 is fixed at that position, and the height of the support frame receiving member 19 can be adjusted.

  FIG. 4 shows a top view (4-1), a back view (4-2), a side view (4-3), and a front view (4-4) of the main body 11 of the footrest connecting member 100. The upper fitting portion 14 and the upper fitting portion 15 are attached to one side of the main body 11 of the footrest connecting member so that the upper fitting portion 14 and the upper fitting portion 15 can be fixed by rotating along the front frame 24 of the wheelchair. The position A shown in FIG. (4-1) is cut in a semicircular shape so that the main body 11 of the footrest connecting member is in close contact with the front frame 24 and is easy to rotate. Yes. The locking groove 16 is a groove into which a locking piece for fixing the footrest is fitted by fitting the main body 11 of the footrest connecting member to the front frame 24 of the wheelchair. The footrest connecting member 100 can be fixed and rotated by inserting and removing the locking pieces.

  FIG. 5 shows a top view (5-1), a side view (5-2), and a front view (5-3) of the support frame receiving member 19. The hole 12 ′ viewed from the upper surface (FIG. 5A) is pivotally mounted in contact with the upper shaft mounting portion 12 of the main body 11 of the footrest connecting member. The adjustment hole 17 shown in the side view (5-2) is fixed by a stopper to which a spring is urged in order to fix the adjustment frame 21. When viewed from the front, there is a hole for inserting the support frame 20 as shown in FIG. 5C, and the support frame 20 is inserted and fixed. One end of the adjustment frame 21 is slidably inserted into the support frame 20.

  6A shows the spring 21b (FIG. 6A-a) of the engaging member of the adjusting frame 21 inserted into the adjusting hole 17 of the support frame receiving member 19, the head 21a (FIG. 6A-b) of the engaging member, and The state (FIGS. 6A to 6C) inserted into the adjustment frame 21 is shown. The head 21a of the engaging member protrudes from the adjustment hole 17 of the footrest connecting member, and when the head is pushed, the biased spring 21b is compressed and the stopper 21c is released to make the adjustment frame 21 slidable. When the head 21a of the engaging member is released, the adjustment frame 21 is fixed by the stopper 21c at that position. The method of adjusting the height while pushing the head 21a has the advantage that it can be operated with one hand, but if it is not careful, there is a risk of clogging fingers, etc., and care must be taken in handling operations.

  FIG. 6B shows another embodiment of the engaging member of the adjustment frame 21 inserted into the adjustment hole 17 of the support frame receiving member 19, and the adjustment hole 17 of the support frame receiving member 19 shown in FIG. 6B-e) and a stopper 21c shown in FIG. 6B-f, and a spring 21b is urged against the stopper to attach the head 21a. The side of the adjustment hole 17 on which the base is inserted is covered with a cover 34 shown in FIG. 6B-d and closed with screws 34a and 34b as shown in FIG. 6B-b. The head 21a of the engaging member protrudes from the other side of the adjustment hole 17, and when the head is pulled, the biased spring 21b is compressed and the adjustment frame 21 is slid as shown in FIG. 6B-c. It becomes movable. When the head 21a of the engaging member is released, the adjustment frame 21 is fixed at that position. As described above, in the method of adjusting the height of the footrest by the operation of pulling the head 21a, it is difficult to adjust the height of the footrest with one hand. The safety of is increased.

  FIG. 7 shows pins 14a and 15a of the upper fitting portion 14 and the lower fitting portion 15 of the footrest connecting member 100 of the present invention on the fitting portions 24a and 24b attached to the front frame 24 of the wheelchair 22 (see FIG. 2). Is inserted, and the footrest connecting member 100 of the present invention is rotatably mounted on the wheelchair 22. When adjusting the height of the footrest, when the head of the engaging member 21a of the adjusting hole 17 of the footrest connecting member 100 is pushed, the engaging member 21a biased by a spring from the groove formed in the adjusting frame 21 is moved. The support frame 20 can be turned up and down. When the head of the engaging member is released at an arbitrary position, the footrest can be fixed at that position. The shape and structure of the footrest attached to the tip of the footrest support frame 20 are not limited, and footrests having various shapes and structures can be attached.

It is a perspective view from the rear side of a footrest connecting member. It is a perspective view from the front side of a footrest connecting member. It is a perspective view of the side of a footrest connecting member. It is a side view of a footrest connecting member. It is a side view of a support frame receiving member. It is a side view of the adjustment part of a support frame receiving member. It is a side view of a support frame receiving member and an adjustment part. It is the side view which attached the footrest connection member to the front part of the wheelchair. It is a perspective view of the wheelchair which installed the conventional footrest.

Explanation of symbols

100: Footrest connecting member 11: Body of footrest connecting member 12: Upper shaft fitting portion 13: Lower shaft fitting portion 14: Upper fitting portion 15: Lower fitting portion 16: Locking groove 17: Adjustment hole 18: Support frame insertion Hole 19: Support frame receiving member 20: Support frame 21: Adjustment frame 22: Wheelchair 23: Armrest 24: Front frame 25: Caster 26: Brake 30: Wheelchair 31: Front frame 32: Footrest support frame 33: Footrest 34: cover

Claims (2)

An upper fitting portion (14) and a lower fitting portion (15) that are rotatably and removably fitted to fitting portions (24a, 24b) provided on the front frame (24) of the wheelchair at the rear. And a front frame receiving member (19) having a support frame insertion hole (18) at the front, and an upper shaft mounting portion (12) for rotatably mounting the support frame receiving member (19), and a footrest support frame (20). A footrest connecting member (100) having a lower shaft attachment portion (13) for axially attaching an adjustment frame (21) inserted in a freely movable manner,
  The footrest support frame (20) is inserted into the support frame insertion hole (18) of the support frame receiving member (19), and the head (21a) of the engagement member protruding from the adjustment hole (17) is pushed to The footrest connecting member, wherein the angle of the footrest can be adjusted by the vertical movement of the support frame receiving member (19) of the adjusting frame (21). The footrest connecting member according to claim 1 , wherein the angle of the support frame receiving member (19) is an adjustment frame (21) having a mechanical lock mechanism biased by a spring.

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