JP3108225U - Wheelchair drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a hand rim on both sides of a drive wheel in a wheelchair, press a drive pad attached so as to be capable of rotating in the front-rear direction along the tread surface of the drive wheel and press it against the tread surface via a grip, and repeatedly rotate with the drive wheel. It is intended to provide a wheelchair driving tool that moves and operates a driving wheel.
SOLUTION: A base end side of a support is pivotally supported on an axle in which a drive wheel is supported on both sides of a vehicle body, and an operation rod is slidably fitted on the free end side so that it can be extended and slidable. A spring is built in, and a concave pad that can be fitted to the tread surface side is attached to the top side of the operation rod facing the outer surface of the tread surface of the drive wheel. A return spring is stretched between the projecting piece projecting at the lower part of the support and the retaining piece projecting at the lower part of the axle to restore the initial position when the grip is released. doing.
[Selection] Figure 1

Description

  The present invention relates to a wheelchair drive means.

  In general, in a normal wheelchair, in a sitting position, a hand rim attached to the outside of a driving wheel (usually called a large wheel) is directly gripped, and reciprocally rotated back and forth to move forward and backward and turn. However, when the hand rim is directly gripped, sliding friction is caused between the palm and the rim, and when a long distance and a strong driving force are required, sliding and frictional heat between the palm and the rim are required. As a result, there is a possibility that the palm of the hand may be disturbed. Therefore, the gloves of the palm are protected using dedicated gloves.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to remove the hand rims on both sides of the drive wheel in a wheelchair and to be able to rotate in the front-rear direction along the tread surface of the drive wheel. It is intended to provide a wheelchair driving tool for operating the driving wheel by pressing the driving pad to the tread surface through the grip and repeatedly rotating with the driving wheel.

  In order to achieve the above object, in the wheelchair drive device according to the present invention, the base end side of the support is pivotally supported on the axle that supports the drive wheels on both sides of the vehicle body, and the operation rod is extended and slid on the free end side. A spring pad is installed between the top end of the support rods and a concave pad that can be fitted to the tread side of the driving wheel facing the outer surface of the tread surface of the drive wheel. In the middle of the operation side, a grip is provided, and the initial position of the pad set above the tread is between the protruding piece extending below the support and the locking piece protruding below the axle. In order to restore the position, a return spring is stretched, and when performing a driving operation while sitting on a wheelchair, the grip is gripped, and the grip, operating rod and pad are attached to the driving wheel against the urging force of the spring. Press to the tread side, fit the concave part of the pad to the tread side and press contact, rotate along the tread surface and drive the drive wheel After stroke actuating operation, solving the pressing of the grip to the pad by the biasing force of the spring, and open from the tread pad returns to its initial position side, thereby enabling repeated driving operation.

  In the wheelchair drive device according to claim 1, the driving wheel pad rim is not provided but the driving pad is indirectly operated against the bias of the spring via the grip, and the pad is directly pressed to the driving wheel tread surface. Rotate forward or backward along the tread surface to drive the drive wheel, stop the grip, operating rod or pad press, and release the pad from the tread surface by the spring force to stop the drive wheel drive In addition, the driving operation process can be repeated by rotating the grip or the pad, and the driving operation processes such as forward / backward movement, turning and steering can be arbitrarily repeated according to the surrounding situation.

  Then, the hand rim in the conventional wheelchair is omitted, the grip is gripped with the palm, and the drive pad is indirectly pressed by pressing the drive pad against the drive wheel tread to perform the drive operation of the drive wheel. This prevents the palm of the hand rim and palm from obstructing the palm due to sliding friction in the conventional hand rim driving method, and even in a moving situation where a long distance and a strong driving force are required. It is possible to respond without using special gloves to protect.

  The base end of the support is pivotally supported on the axle of the wheelchair on both sides of the body of the wheelchair, and the operating rod is slidably fitted on the free end to provide a spring between the top end of the support The interior is equipped with a concave pad that can be fitted to the tread side of the operation wheel on the top side of the operation wheel, and a grip is provided in the middle of the operation wheel. In order to restore the initial position of the pad set above the tread between the protruding piece extending below the support and the locking piece protruding below the axle, a return spring is stretched, When driving while sitting on a wheelchair, grip the grip, press the grip, operating rod and pad against the tread side of the drive wheel against the biasing force of the spring, and fit the recessed part of the pad to the tread side In combination, press and rotate along the driving wheel tread to drive the driving wheel, and after the driving operation stroke, release the grip or pad press, By the urging force of Ne, open from tread pad returns to its initial position side, thereby enabling repeated driving operation.

  FIG. 1 is an elevational view of an embodiment of the wheelchair drive device according to the present invention, in which a base end side of a support (4) is pivoted on an axle (3) that supports drive wheels (2) on both sides of a vehicle body (1). An operating rod (4a) is slidably fitted on the free end side, and a spring (4b) is installed between the top end of the supporting rod, and on the top side of the operating rod (4a), A concave pad (5) that can be fitted to the tread side is provided facing the outer surface of the tread surface (2a) of the drive wheel (2), and a grip (6) is provided in the middle of the operating rod side. In order to restore the initial position (A) of the pad set above the tread surface between the protruding piece (4a) extending below the support and the locking piece (7a) protruding below the axle, When the return spring (7) is stretched and the grip, the operating rod, and the pad are pressed to rotate, A1 and A2 are the approximate positions in the forward stroke and the backward stroke, respectively. Show.

  FIG. 2 is a plan view of the embodiment shown in FIG. 1 and shows that each of the above-described components consists of a pair on both sides.

  3 is a cross-sectional view of the main part on the left side of AA in FIG. 1 of the embodiment, and is separated from the concave pad (5) facing the tread surface (2a) of the drive wheel (2). 4 shows that the grip (6), the operating rod (4a), and the pad (5) of the driving wheel are opposed to the bias of the spring (4b) from the state of FIG. FIG. 5 is a plan view seen from B in FIG. 4, showing a state where the tread is pressed to the tread side (B) and the concave portion of the pad is fitted to the tread side and pressed.

  Since the pad (5) can be driven without slipping even when the pressing force on the driving wheel tread (2a) is relatively light, the material of the mating surface with the tread is resistant to the hardness of the tread material. Abrasive rubber-like elastic material is recommended.

  The device of the present invention can be applied not only to driving means for ordinary wheelchairs in welfare equipment but also to wheelchairs for competition practice that require a long distance and a strong driving force.

  It is an elevation view of an embodiment of the wheelchair drive device of the present invention.   1 is a plan view of the embodiment example.   It is sectional drawing of the left side principal part in AA of FIG.   It is sectional drawing of the left side principal part in AA of FIG. 1, Comprising: The displacement state when pressing force is loaded to B arrow side is shown.   It is a top view seen from the B arrow of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Drive wheel 2a Tread surface 3 Axle 4 Support 4a Operation rod 4b Spring 4c Projection piece 5 Pad 6 Grip 7 Return spring 7a Retaining piece 8 Caster A Initial position (grip or pad)
A1 Outline position of the forward stroke (grip or pad)
A2 Outline position of back stroke (grip or pad)
B Pressing direction (grip or pad)

Claims (1)

  Wheelchair body (1) The support wheel (4) is pivotally supported on the axle (3) that pivotally supports the drive wheels (2) on both sides of the wheelchair. The spring (4b) is installed between the top end of the support rod and freely mounted, and the top side of the operation rod (4a) is opposed to the outer surface of the tread (2a) of the drive wheel (2). A concave pad (5) that can be fitted to the tread surface is provided, and a grip (6) is provided in the middle of the operation rod side, and a projecting piece (4a) that extends below the support rod and the axle lower portion In order to restore to the initial position (A) of the pad set on the upper surface of the tread, the return spring (7) is stretched between the locking piece (7a) protruding from When driving, the grip is gripped, the grip or pad is pressed against the tread side of the drive wheel against the urging force of the spring (4b), and the recess of the pad is fitted to the tread side and pressed. , It rotates along the driving wheel tread to drive the driving wheel.After the driving operation, the grip or the pad is released, and the spring is biased to release the pad from the tread and return to the initial position. A wheelchair drive device characterized in that the drive operation can be repeated.

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