JP2796663B2 - Rim with handling for wheelchair wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human-powered wheelchair used by people who have difficulty walking or has difficulty, and more particularly to a wheelchair wheel having a rim provided with manual handling.

[0002]

2. Description of the Related Art In a conventional wheelchair, a wheelchair frame is supported by a large-diameter traveling wheel and a small-diameter steering auxiliary wheel. The wheelchair is operated by the auxiliary wheel and driven by the traveling wheel.
Generally, the user rotates the wheels with both hands via handling attached to the left and right traveling wheels to travel back and forth, or to turn left and right.

FIG. 3 is an external view of a wheelchair equipped with a conventional rim-mounted wheel. A wheelchair body 1 composed of a plurality of frames combined left, right, front and rear is composed of a pair of left and right running wheels 2 disposed at a rear portion thereof. Four points are supported by a pair of left and right auxiliary wheels 3 arranged in a part, and a cloth or the like is stretched between the frames. The leg rest 6 is fixed downward, and the armrest pads 7 are fixed to the left and right sides of the seat surface 4. Then, the user grips the handling 9 provided around the outside of the traveling wheel 2 with both hands of the user extending downward from the upper side of the elbow pad 7, and applies a rotational force to both or one of the handlings 9,
It is possible to move on its own by going straight or turning. The handling is usually attached to the rim of the traveling wheel with bolts or other fittings. For example, Shokai 4
No. 9-25149 or JP-A-52-53563. That is, as shown in FIG. 5, the former is attached to the rim 8 of the traveling wheel by bolts 11 so as to protrude outward in the lateral direction in the axle direction of the traveling wheel.
A handling 9 is mounted concentrically with the running wheel by projecting laterally outward from the running wheel with up to five mounting brackets 12. In the latter, as shown in FIG. 6, a handling 9 is concentrically attached to the outside of the traveling wheel 2 via a bolt 11 laterally provided at a base end of a holding bracket 13 gripped on the traveling wheel 2. .

However, in the above-described structure, after the rim 8 and the handling 9 are manufactured separately, these are combined to form a wheel having the handling 9 attached to the rim 8. Therefore, the number of parts and the number of assembling steps of the wheel are increased, and the wheel having the above structure is expensive.

[0005] A circumferential mounting bracket 12 extending laterally from a flange 17 of the rim between the rim 8 and the handling 9.
Because of the presence of the gap, the operator's finger 10 hits the mounting bracket 12 during the operation of the handling 9 as shown in FIG. 4, and the finger 10 was injured or gripped.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the burden of manufacturing a wheel with a handle having a handle on the outside of a wheelchair wheel.
In order to reduce the number of parts and the number of assembly steps, and to prevent the user's fingers from hitting the mounting bracket during the handling operation and causing injury to the fingers or loss of grip, eliminate the circumferential gap between the rim and the handling, and The elimination of the mounting hardware and the assurance that the user can grip the handling firmly.

[0007]

According to the first aspect of the present invention, a pair of left and right large-diameter traveling wheels and a pair of left and right small-diameter steering auxiliary wheels are rotatable. In the wheelchair frame provided in such a state, in a wheelchair provided with handling concentrically outside the running wheel, circumferentially continuous annular ribs are protrudingly provided on the flange outer surface side wall of the rim of the running wheel, and the rim radius center direction is provided. A rim with a handle for wheelchair wheels, wherein an annular handling, which is a hollow body having a vertically long elliptical cross section, is integrally provided around a protruding end of an annular rib.

According to a second aspect of the present invention, the major axis of the hollow elliptical hollow body of the annular handling is l ₁ <l from its upper end.
Divided into l ₁ and l ₂ to _2, it is the above handling with rim for a wheelchair wheel, wherein it has provided around integrally with the rib projecting end of the hollow body side portion positioned in the horizontal direction of the dividing point.

According to a third aspect of the present invention, there is provided a method for manufacturing a rim with a handle for a wheelchair wheel, the method comprising: a rim having a spoke mounting surface and a flange rising from both sides of the spoke mounting surface to fit a tire. Extrude the handling consisting of a vertically elongated elliptical hollow body from the metal material at the rib protruding sideways from the rim flange and the rib protruding end, and integrally mold a long handling rim straight strip,
The rim straight strip with handling is bent to an appropriate curvature, and the bent strip is cut to form a rim shaped body with handling,
A method for manufacturing a rim with a handle for a wheelchair wheel, characterized in that both ends of the rim-shaped body with a handle are abutted and joined to form an annular body, and a spoke hole and a valve hole are formed on a spoke attachment surface of the rim.

[0010]

According to the rim with a wheelchair handling of the present invention, a rib protruding laterally in the axial direction from the rim is provided on the entire periphery of the rim to form an annular rib, and an annular handling is integrally formed with a protruding end of the annular rib. Because it is provided by extrusion molding,
The finger of the wheelchair user grasping the handling can smoothly slide on the surface of the annular rib. Therefore, in order to drive the wheels, the fingers grasping the handling are sent from the front to the back to rotate the handling, and in order to further rotate the handling, the handling is slipped when the fingers sent behind are forwarded. There are no obstacles that can be caught, so there are no obstacles to the fingers. In addition, the connection of the annular handling to the rib is performed by setting the major axis of the hollow body having a longitudinally elliptical cross section of the annular handling to l ₁ <
divided into l ₁ and l ₂ to l _2, since the circumferentially provided integrally with the rib projecting end of the hollow body side portion positioned in the horizontal direction of the dividing point, the top of the hollow body when the wheelchair user grasps the handle Since the user puts his thumb and squeezes the rest with his or her fingers other than the thumb, he / she can grasp with strong grasping power without losing his / her grip.

[0011] The manufacture of the rim with a handle for wheelchair wheels of the present invention is performed by bending, cutting, and butting a rim, a handle, and an integrally formed straight piece of a rib made of an extruded material such as a light alloy material or by electric welding or a pin and a core. Rim and handling can be formed simultaneously. Therefore, the number of assembly parts and the number of steps are small, and the manufacturing can be efficiently performed at low cost.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The shape of a rim with a handle for a wheelchair traveling wheel according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a rim with a handle for a wheelchair traveling wheel. The rim 8 includes a spoke mounting surface 14 and flanges 17 rising from both ends thereof. A through hole 15 is provided in a corner formed by the spoke attachment surface 14 and the flange 17, and the through hole 15 serves as a joining hole for inserting and fitting a pin. From the base of the outer wall surface 18 of one of the flanges of the rim 8, a rib 19 protruding in the lateral direction is protruded, and a vertically elongated elliptical handling 9 having an inner hollow having a coupling hole 26 into which a core 27 is pressed is provided. Is provided at the protruding end portion 20. As shown in FIG. 1, the joining position of the protruding end portion 20 and the handling 9 is the major axis 2 of the hollow elliptical hollow body of the annular handling 9.
3 is divided from its upper end into l ₁ and l ₂ satisfying l ₁ <l ₂ to form a hollow body side portion 25 located in the horizontal direction of the division point. The rim 8, the rib 19 and the handling 9 are integrally formed.

[0013] These are annular one-piece molded articles for wheels, and the external appearance of a part thereof is shown in FIG. As shown in FIG. 2, the handling 9 is formed of a hollow body having a vertically long elliptical cross section in the direction of the center of the rim radius, and the surface thereof constitutes a gripping surface for fingers when driving the traveling wheels. The handling is provided around a tip end of an annular rib projecting laterally from an annular rim for a wheel, and has an annular body slightly smaller in diameter than the annular rim.

In the manufacture of the rim with a handle for a traveling wheel of the present invention, a light alloy material or the like is extruded to form a rim 8, a rib 19, and a handling 9 having a cross section shown in FIG.
A long piece of rim with a handle is integrated. The long material of the rim with the handling is bent at an arbitrary curvature corresponding to the size of the traveling wheel and cut, and both ends of the cut curved body of the rim with the handling are joined by electric resistance welding. After making the rim with an annular handling, deburring and polishing are performed. Alternatively, a pin is inserted and fitted into the through holes 15 at both ends of the rim 8 of the bent body to be joined, and a core 27 is pressed into the connecting holes 26 at both ends of the handling 9 in the direction of the arrow as shown in FIG. Joined to form an annular rim with handling.

Through the above steps, a rim with a handle is manufactured in which the annular handling 9 is integrally provided around the protruding end of the annular rib projecting laterally from the annular rim.

After that, the rim portion is processed such as making a hole for a spoke on a rim and a hole for a valve of a tube for a running wheel, and then, a wheel assembly such as mounting of a spoke 21 and a tire 22 is performed. The running wheels are completed.

That is, when the manufacturing method of the present invention is disassembled in steps, 1) extrusion, 2) bending, 3) cutting, 4) butt joining, 5) processing of a rim portion such as spoke hole making, 6) wheel assembly. It consists of six steps.

On the other hand, in the conventional manufacturing of a rim with a handle for a traveling wheel, a light alloy material or the like is extruded to separate a long material of the rim 8 and a long material of the handling 9 into separate processes. The long member of the rim 8 and the long member of the handling 9 are bent at an appropriate curvature in separate steps to form an annular member, and the annular member of the rim 8 and the annular member of the handling 9 are formed. The cut ends of the body are butted together, and the butted portions are subjected to electric resistance welding and then deburred and polished, or pins are inserted into through holes at both ends of the rim 8 to be joined, and the pins are joined together. The core 27 is inserted and fitted into the coupling holes at both ends of the handling 9 and sleeve-joined to form an annular rim and an annular handling, respectively.

Thereafter, a plurality of mounting holes for mounting fittings are provided in each of the annular rim and the annular handling, and mounting fittings are mounted in the mounting holes to form the annular rim and the annular handling. Assembled and joined to form a rim with handling.

After that, the rim portion is machined such as making a hole for a spoke and a valve hole for a tube on the rim 8 for a traveling wheel, and then a wheel assembly such as a spoke 21 or a tire 22 is assembled. And the running wheels are completed.

That is, when the conventional manufacturing method is decomposed into steps,
At the rim, 1) extrusion, 2) bending, 3) cutting,
4) Butt joining, 5) Processing of rim part such as drilling of spoke holes, 6) 6 steps of drilling of mounting brackets for assembly, and 7) extrusion, 8) bending, 9) cutting, 10 in handling part. ) Butt bonding, 11) Drilling of mounting brackets for assembly, and 12) Assembling of handling to rim, and 13) Wheel assembly.

Accordingly, the number of assembling steps of the present invention is reduced by 13 steps−6 steps = 7 steps as compared with the conventional number of steps.
In addition, four to six holding brackets and mounting brackets such as bolts are not required, and the number of parts is reduced by half.

[0023]

As described above, the rim with a handle according to the present invention is formed by integrally forming the rim of the wheelchair traveling wheel, the handling for driving the traveling wheel, and the rib for connecting them, and the rib is an annular continuous rim. The number of manufacturing steps for the rim with handling of the present invention is almost half that of the conventional manufacturing process, and the number of parts is also halved compared to the conventional product. it can. Furthermore, since the ribs are annular continuous surfaces and there is no gap between the rim and the handling, the wheelchair user does not plunge his / her fingers into the gaps during running, and injury to the fingers due to rotation of the running wheels due to inertial force. You will not lose your grip on handling, and you can hold firmly and firmly.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a wheelchair-equipped rim according to the present invention.

2A and 2B are a partial view of a rim with a wheelchair wheel handling according to the present invention and a diagram illustrating joining of the rim.

FIG. 3 is a perspective view of a conventional wheelchair.

FIG. 4 is an explanatory view of a conventional operation state of handling by a finger of a wheelchair.

FIG. 5 is an explanatory view of a conventional mounting state of a rim for a traveling wheel and a handling.

FIG. 6 is an explanatory view showing a state in which a rim for a conventional traveling wheel and a handling are mounted.

[Description of Signs] 1 Wheelchair body 2 Running wheel 3 Auxiliary wheel 4 Seat surface 5 Back rest 6 Leg rest 7 Elbow rest pad 8 Rim 9 Handling 10 Finger 11 Bolt 12 Mounting bracket 13 Clamping bracket 14 Spoke mounting surface 15 Through hole 16 Rim Radial center direction 17 Flange 18 Outer wall surface 19 Rib 20 Protrusion 21 Spoke 22 Tire 23 Long diameter 24 Long upper end 25 Hollow body side 26 Connection hole 27 Core

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B60B 21/00-21/12 A41G 5/00-5/04

Claims (3)

(57) [Claims] 1. A pair of left and right large-diameter traveling wheels and a pair of left and right small-diameter steering auxiliary wheels are provided on a wheelchair frame so as to be rotatable, respectively, and are formed concentrically with the traveling wheels outside the traveling wheels. In a wheelchair provided with a handling, an annular rib continuously extending in a circumferential direction is protruded from one outer wall surface of a rim flange of a traveling wheel, and an annular handling formed of a hollow body having a vertically long elliptical cross section in a rim radial direction is provided at a rib tip. A rim with a handle for wheelchair wheels, the rim being integrally provided around the part. Wherein the major axis of the cross-section longitudinally long elliptical hollow annular handling divided from its upper end to the l ₁ and l ₂ to l ₁ <l _2, ribs projecting hollow side portion positioned in the horizontal direction of the dividing point 2. The rim with a wheelchair wheel handling according to claim 1, wherein the rim is integrally provided around the portion. 3. A rim having a spoke mounting surface and a rim formed from both sides of the spoke mounting surface and comprising a flange for fitting a tire, a rib protruding laterally from one rim flange, and a vertically elongated elliptical hollow body at a rib tip end. Is extruded from a metal material to integrally form a long rim strip with a handle, the rim strip with a handle is bent to an appropriate curvature, and the bent strip is cut to form a rim-shaped body with a handle. A method of manufacturing a rim with a wheelchair wheel, comprising: a rim-shaped body with a handle; and ends are joined by joining both ends to form an annular body, and a spoke hole and a valve hole are formed on a spoke attachment surface of the rim.