JP5936389B2 - Wheelchair hand rim cover - Google Patents

Description

  The present invention relates to a hand rim cover for a wheelchair.

  When moving in a wheelchair, a passenger needs to manually drive (crawling) a ring-shaped hand rim directly connected to the outside of the drive wheel to drive the drive wheel. However, in the case of a passenger who has difficulty in hand due to damage to the cervical spinal cord, the grip strength and the turning force are weak, and an uneven hand rim may be used. There are many problems in terms of cost and time to replace a hand rim with an uneven hand rim.

  Therefore, a tape having a non-slip layer on one side of the foam layer and an adhesive layer on the other side is spirally wound around the hand rim (see, for example, Patent Document 1).

JP 2005-13692 A

  For tapes with a non-slip layer on one side of the foam layer and a tape with an adhesive layer on the other side that is spirally wound around the hand rim, a sheet of natural leather, polyurethane, etc. with the anti-slip layer punched or uneven It is. For passengers with strong gripping and gripping force, slippage due to sweat etc. can be suppressed, but for passengers with weak gripping and gripping force, punching or uneven tape is weak and the gripping force is weak. It does not communicate well with the hand rim.

  Further, in the case of winding the tape, there are problems that it takes time for winding, oozes out on the surface where the adhesive layer is wound, or when returning to the original hand rim, a part of the adhesive layer remains even if the tape is peeled off.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a wheelchair hand rim cover that can be easily attached to and detached from the hand rim, is easily hooked, and is easy to row.

The wheelchair hand rim cover of the present invention made to solve the problem is a wheelchair hand rim cover that is disposed on the outer side in the width direction of the driving wheel of the wheelchair and is attached to a ring-shaped hand rim that interlocks with the driving wheel. an elastic member made of a ring-shaped hollow cylindrical body for covering the hand rim, the ring side circumferential direction of the elastic member made of a ring-shaped hollow tubular body over the switching allocation for detaching said ring hand rim all around the ring Te provided, the ring outer periphery of the elastic member made of a ring-shaped hollow tubular body is characterized in that wedge Cobb height gradually increases in a forward direction opposite to the direction of rotation are more spaced to the ring circumferential direction .

  Since a plurality of wedge-shaped bumps are provided on the outer periphery of the ring, the hand is easily caught, and the power to be transmitted is well transmitted to the hand rim. Further, since the cut is formed, it is easy to attach to and remove from the hand rim.

In the wheelchair Hand rim cover, may the the time the hand rim cover and wearing to the ring-shaped hand rim wedge hump is inclined toward the inner edge from the outer edge of the ring-shaped hand rim.

  When the handicapped passenger slides the hand operating the ring-shaped hand rim to stop the wheelchair, the hand can smoothly slide.

  The maximum height of the wedge-shaped bumps is preferably 3 to 10 mm.

  When the height is 3 mm or more, the hand catching force is easily transmitted to the hand rim. When the height is 10 mm or less, the hand is not caught by the wedge-shaped bump when the hand is slid for stopping, and the bump does not get in the way.

Moreover, the said ring-shaped hollow cylinder made from an elastic material and the said wedge-shaped bump are good in it being rubber.

  The slip between the cover and the hand rim and the slip between the cover and the hand are suppressed, and the rowing force is effectively transmitted to the drive wheels. Further, since there is no adhesive layer, even if the cover is removed from the hand rim, a part of the adhesive layer does not remain on the hand rim.

Further, the ring-shaped hollow cylinder made of an elastic material is a plurality of divided arc-shaped hollow cylinders, and has a convex ring at one end of the divided arc-shaped hollow cylinder, and the convex ring at the other end. Is inserted, and the convex ring of one divided arc-shaped hollow cylinder is inserted into the opening of the other divided arc-shaped hollow cylinder and connected in plural .

  By changing the number of divided arcuate hollow cylinders to be connected, hand rims of different sizes can be handled.

  Since there are a plurality of wedge-shaped bumps whose height gradually increases in the direction opposite to the forward rotation direction on the outer periphery of the ring-shaped hollow cylindrical body, the hand rim is easy to catch a hand for forward drive on the protruding end of the wedge-shaped bump. It is transmitted well to. Further, since the cut is formed, it is easy to attach to and remove from the hand rim.

It is a schematic perspective view of the hand rim cover concerning Embodiment 1 of the present invention. It is the BB sectional view taken on the line of FIG. It is a schematic perspective view of a wheelchair provided with a hand rim equipped with a hand rim cover according to Embodiment 2 of the present invention. FIG. 4 is a 1/4 partial enlarged rear (A arrow) view of the left hand rim cover of FIG. 3. FIG. 5 is a sectional view taken along line B1-B1 of FIG. 4 (hand rim not shown). It is C arrow (side) view figure of FIG. FIG. 5 is a sectional view taken along line B2-B2 of FIG. It is a figure explaining the connection of the hand rim cover divided into 4 equal parts.

  A wheelchair hand rim cover according to an embodiment of the present invention will be described with reference to the drawings. The wheelchair includes driving wheels on the left and right sides, and a ring-shaped hand rim that is linked to the driving wheels on the outer side in the width direction of the driving wheels. In the case of an occupant with no hand obstacles, the wheelchair can be moved forward by rotating the driving wheel forward by grasping the left and right ring-shaped hand rims with the left and right hands and pushing them downward. The hand pushed down forward can be moved forward along the hand rim that rotates forward, and then pulled forward and grasped again to push it forward. However, in the case of an occupant with a hand disorder due to damage to the cervical spinal cord, the hand rim cannot be gripped.

(Embodiment 1)
FIG. 1 is a partial schematic perspective view of a hand rim cover according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line BB in FIG. The hand rim cover 1 according to the first embodiment has a ring-shaped hollow cylinder 11 that can cover a ring-shaped hand rim of a wheelchair.

  The ring-shaped hollow cylinder 11 is formed with a slit 11a to be attached to and detached from the hand rim, and the ring outer periphery 11b of the ring-shaped hollow cylinder 11 has a wedge shape whose height gradually increases in the direction opposite to the forward rotation (arrow B) direction. A plurality of bumps 12 are provided.

  The ring-shaped hollow cylinder 11 and the wedge-shaped bump 12 are made of an elastic material. Resin or rubber can be used as the elastic material. Both the ring-shaped hollow cylinder 11 and the wedge-shaped bump 12 may be integrally formed, or the wedge-shaped bump 12 may be bonded to the cylinder 11 with an adhesive or the like.

  The rubber is preferably a synthetic rubber such as EPDM, CR rubber, silicone rubber, urethane rubber. These synthetic rubbers are easy to mold, have a large friction coefficient, and are difficult to slip. The hardness of the rubber is preferably about 50-80.

  Since the wheelchair hand rim cover 1 of the present embodiment includes a plurality of wedge-shaped bumps 12 whose height gradually increases in the direction opposite to the forward rotation (arrow C) direction on the ring outer periphery 11b of the ring-shaped cylinder 11, forward rotation (arrow C) ) When the hand is rotated in the direction, the hand is easily caught on the protruding end portion 12b of the wedge-shaped bump 12, and the rowing force is transmitted well to the hand rim. When the hand pushed down forward is pulled forward along the hand rim that rotates forward, the hand can be smoothly slid and lifted forward without being caught by the hand. Moreover, since the cut 11a is formed, it is easy to attach to and detach from the hand rim.

(Embodiment 2)
3 is a schematic perspective view of a wheelchair equipped with a hand rim to which the hand rim cover of this embodiment is attached, and FIG. 4 is a 1/4 partial enlarged A arrow (rear) view of the left hand rim cover of FIG. 5 is a cross-sectional view taken along line B1-B1 (not shown) in FIG. 4, FIG. 6 is a view taken along arrow C (side) in FIG. 4, and FIG. 7 is a cross-sectional view taken along line B2-B2 in FIG. is there. FIG. 8 is a diagram for explaining the connection of the hand rim cover divided into four equal parts.

  The hand rim cover 2 of the present embodiment has a ring-shaped hollow cylinder 21 that can cover the ring-shaped hand rim 100 on the left side of the wheelchair.

  The ring-shaped hollow cylinder 21 of the wheelchair hand rim cover 2 according to the present embodiment is formed by connecting divided arc-shaped hollow cylinders 211, 212, 213, and 214 divided into four equal parts (see FIG. 8).

  Divided arc-shaped hollow cylinders 211, 212, 213, 214 divided into four equal parts are divided into 211a (see FIG. 7), 212a (not shown), 213a (not shown), 214a for attaching to and removing from the hand rim 100. (Not shown) is formed, and a plurality of wedge-shaped bumps 22 whose circumferential height gradually increases are provided on the outer peripheral edges of the divided arc-shaped hollow cylinders 211, 212, 213, 214 divided into four equal parts. The wedge-shaped bump 22 of this embodiment gradually increases in height in the direction of arrow A2.

  The protruding end 22b of the wedge-shaped bump 22 faces the drive (arrow A1, forward) direction. The side 22a of the wedge-shaped bump 22 along the outer (left) edge of the ring-shaped hand rim 100 is inclined from the outer (left) edge of the ring-shaped hand rim 100 toward the inner (right) edge of the ring (see FIG. 4). ).

  Convex rings 211b, 212b, 213b, and 214b are provided at one end of the divided arc-shaped hollow cylinders 211, 212, 213, and 214 divided into four equal parts. The convex ring 211b of the divided arc-shaped hollow cylinder 211 is engaged with the other end of the divided arc-shaped hollow cylinder 212 so that the divided arc-shaped hollow cylinders 211 and 212 are connected. Similarly, the convex ring 212b of the divided arc-shaped hollow cylinder 212 is engaged with the other end of the divided arc-shaped hollow cylinder 213 so that the divided arc-shaped hollow cylinders 212 and 213 are connected. The convex ring 213b of the divided arc-shaped hollow cylinder 213 engages with the other end of the divided arc-shaped hollow cylinder 214, and the divided arc-shaped hollow cylinders 213 and 214 are connected. The convex ring 214 b of the divided arc-shaped hollow cylinder 214 is engaged with the other end of the divided arc-shaped hollow cylinder 211 to connect the divided arc-shaped hollow cylinders 214 and 211 to the ring-shaped hollow cylinder 21. (See FIG. 8).

  The height h of the protruding end 22b of the wedge-shaped bump 22 is preferably 3 to 10 mm. When the height h is 3 mm or more, the hand is easily caught, and the heeling force is easily transmitted to the hand rim 100. When the height h is 10 mm or less, when the hand is slid for stopping, the hand is not caught by the wedge-shaped bump 22 and the wedge-shaped bump 22 does not get in the way.

  The ring-shaped hollow cylinder 21 and the wedge-shaped bump 22 are integrally formed of synthetic rubber, and the inner diameter of the ring-shaped hollow cylinder 21 is made smaller than the outer diameter of the hand rim 100, whereby the ring-shaped hollow cylinder is formed with respect to the hand rim 100. It is suppressed that the body 21 idles.

  When idling becomes a problem, the hand rim cover 2 may be fixed to the hand rim 100 by, for example, winding a registered trademark Velcro band.

  When it is not necessary to remove the hand rim cover 2 from the hand rim 100, the hand rim cover 2 may be fixed to the hand rim 100 with an adhesive.

  Since the protruding end 22b of the wedge-shaped bump 22 is opposed to the driving (arrow A1, forward) direction, when the left hand is moved in the direction of the arrow A1 in order to move forward, the hand is caught on the protruding end 22b, and the driving force is effective on the driving wheel. It is transmitted to.

  The side portion 22a along the outer (left) edge of the ring-shaped hand rim of the wedge-shaped bump 22 is inclined from the outer (left) edge of the ring-shaped hand rim toward the inner (right) edge of the ring. When stopping by hand, the hand is slid in the direction of arrow A2, but is not obstructed by the wedge-shaped bump 22.

  In the hand rim cover 2 of the present embodiment, as shown in FIG. 7 a, the protruding end 22 b of the wedge-shaped bump 22 is positioned at the outer circumferential edge 100 a (outer-inner middle) of the ring-shaped hand rim 100. However, depending on the degree of obstacle of the occupant and individual differences, it may be better to catch the hand if the protruding end portion 22b of the wedge-shaped bump 22 is displaced outward or inward. In that case, the split 211a may be widened and the split arc-shaped hollow cylinder 211 may be rotated in the direction of the arrow C2 or the arrow C3. FIG. 7b shows a state in which the ring-shaped hollow cylinder 21 is put on the hand rim 100 by being rotated in the direction of the arrow C2, but the protruding end 22b of the wedge-shaped bump 22 is slightly shifted outward.

  Next, a modified hand rim cover will be described. The wheelchair hand rim cover 2 according to the present embodiment is obtained by dividing the ring-shaped hollow cylinder 21 into four equal parts and connecting the divided arcuate hollow cylinders 211, 212, 213, and 214. That is, the center angle θ of the divided arc-shaped hollow cylindrical body 211 = π / 2 and the radius r = 290.5 mm. Therefore, the wheelchair hand rim cover 2 according to this embodiment has a diameter of 581 mm and a circumference of 1825 mm, and can be attached to a hand rim having a diameter of about 581 mm and a circumference of about 1825 mm. The reason why the diameter is around 581 mm and the circumference is around 1825 mm is because the wheelchair hand rim cover 2 is made of synthetic rubber and can expand and contract. If you can't cope with expansion and contraction, you can cut it off for a long time.

  The wheelchair hand rim cover 2 of the present embodiment cannot be attached to a hand rim having a diameter larger than 581 mm (circumference is 1825 mm). For example, in order to attach to a hand rim having a diameter of 563 mm and a circumference of 1768 mm, it is necessary to newly prepare a hand rim cover having a diameter of around 563 mm and a circumference of around 1768 mm.

  We would like to avoid preparing a new one because it increases costs. However, it is not necessary to prepare a new one as follows.

  In the present embodiment, the ring-shaped hollow cylinder 21 is divided into four equal parts (θ = π / 2). However, as shown in FIG. 5, the ring-shaped hollow cylinder 21 is further divided into eight equal parts and the arc center angle θ1 = θ / 8 is obtained. To do. Then, the hand rim cover 2 according to this modification is formed by connecting 32 (= 8 × 4) arcuate hollow bodies.

  As in the second embodiment, when the radius r is 290.5 mm, the arc of the arc-shaped hollow body is 57 mm (= rθ1 = 290.5 × π / 16), and thus, for example, the number of arc-shaped hollow bodies is reduced by one. When the 31 arc-shaped hollow bodies are connected, the circumference is reduced by about 57 mm, the circumference is about 1768 mm (= 1825 mm−57 mm), the diameter is about 563 mm, and the hand rim has a diameter of 563 mm and a circumference of 1768 mm. Can be attached.

  When two arc-shaped hollow bodies are reduced and 30 arc-shaped hollow bodies are connected, the circumference is reduced by about 114 mm (57 mm × 2), the circumference is about 1711 mm (= 1825 mm−114 mm), and the diameter is about 545 mm. It can be attached to a hand rim having a diameter of around 545 mm and a circumference of around 1711 mm.

  The hand rim cover according to the above-described modification is composed of 32 divided arc-shaped hollow bodies. However, the division may be further divided to prepare a large number of divided arc-shaped hollow bodies having various lengths. It can be attached to hand rims of various sizes by selecting and connecting divided arcuate hollow bodies having different lengths according to the size of the hand rim to be attached. In this case, the connection can be performed with an adhesive tape or the like.

1, 2, ............ Hand rim cover 11, 21 ... Ring-shaped hollow cylinder 11a ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cutting 12, 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cutter wedge 22a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Side parts 211, 212, 213, 214...

Claims (5)

A wheelchair hand rim cover that is mounted on a ring-shaped hand rim that is arranged on the outer side in the width direction of the driving wheel of the wheelchair and interlocks with the driving wheel,
Having an elastic ring-shaped hollow cylinder covering the ring-shaped hand rim,
Wherein the ring side circumferential direction of the elastic member made of a ring-shaped hollow cylindrical body provided over the switching allocation for detaching said ring hand rim all around the ring,
A wheelchair hand rim cover characterized in that a plurality of wedge-shaped bumps whose height gradually increases in the direction opposite to the forward rotation direction are arranged apart from each other in the ring circumferential direction on the ring outer periphery of the ring-shaped hollow cylinder made of elastic material .   2. The wheelchair hand rim cover according to claim 1, wherein when the hand rim cover is attached to the ring-shaped hand rim, the wedge-shaped bump is inclined toward an inner edge from an outer edge of the ring-shaped hand rim.   The wheelchair hand rim cover according to claim 1 or 2, wherein the maximum height of the wedge-shaped bump is 3 to 10 mm. The wheelchair hand rim cover according to any one of claims 1 to 3, wherein the elastic ring-shaped hollow cylinder and the wedge-shaped bump are made of rubber. The ring-shaped hollow cylinder made of elastic material is a plurality of divided arc-shaped hollow cylinders having a convex ring at one end of the divided arc-shaped hollow cylindrical body and inserting the convex ring at the other end. has an opening that is, the wheelchair hand rim cover of claim 4, by inserting the convex ring of one of the split arcuate hollow cylinder in the opening of the other split arcuate hollow cylinder formed by a plurality linked .

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