JP3488962B2 - Wheelchair wheel spoke cover device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair provided with operating wheels outside wheels provided on both left and right sides of a wheelchair and a cover for covering spokes from outside the wheels. 2. Description of the Related Art Generally, a wheelchair is provided with operation wheels outside wheels provided on both left and right sides of the wheelchair, and the wheelchair can be operated by operating the operation wheels. In this case, there is a case where a finger or the like touches the spokes of the wheel to cause injury, and in order to prevent the injury, there is a device provided with a conical cover that covers the spokes from outside the wheel. In this cover, three mounting holes are formed on the same circumference at the center in the radial direction, bolts are passed through the holes, and screwed to the bolts through rigid washers applied to the insides of the spokes. The cover is fastened and fixed to the spokes with nuts. The washer has a groove into which the spoke fits, and the nut is tightened while the groove is in contact with the spoke. [0003] As described above, since the cover is tightened and fixed to the spokes by the bolt, the rigid washer, and the nut screwed to the bolt, adjustment for stably attaching the cover is performed. It is troublesome. In other words, the three attachment points are provided at equal angular intervals on the circumference, and the adjustment is troublesome because the nuts are attached and tightened so that the distance between the spokes and the cover becomes uniform at these three points. It is. In addition, replacement when the cover is damaged is also quite troublesome. [0004] Further, since this mounting portion is located at the intermediate portion in the radial direction of the cover, the spokes and the cover are spaced apart from each other due to a difference in the angle and position of the spokes due to a difference in the wheel configuration or distortion of the rim. Due to the different relationship, it is troublesome to adjust the cover to be uniformly and stably mounted with little distortion. In view of the foregoing, the present invention provides a spoke cover device for a wheelchair wheel, which can be easily attached to and detached from a spoke, and can cope with variations in the distance between the spoke cover and the spoke. I do. SUMMARY OF THE INVENTION The present invention is directed to a wheelchair in which a wheelchair is operated by operating wheels provided on both right and left sides and operating wheels provided on the outside thereof, wherein a diameter of a rim of the wheel is provided. A cover having a smaller diameter than the wheel and covering the spoke from the outside of the wheel; and a flange fixed to the outer surface of the cover through a plurality of mounting holes formed in the periphery of the cover to elastically connect the spoke to the spoke from the left and right. A spoke of a wheelchair wheel, comprising: a synthetic resin clip having a locking claw for locking to the spoke; and an elastic washer compressed between the cover and the spoke in a state where the locking claw is locked to the spoke. It is a cover device. With this configuration, the clip is inserted into the mounting hole of the spoke cover and pressed from the outside of the spoke cover, so that the locking claw is locked to the spoke in a state where the elastic washer is pressed. For this reason, even when the distance between the spoke cover and the spoke is different due to a variation in the position of the spokes of the wheel, a variation in the thickness of the spoke cover, or the like, the spoke cover is not rattled by supplementing it with an elastic washer. Can be attached. Further, as compared with a conventional bolt and nut that are fastened by a tool and attached to the spokes, the attachment is easier. In addition, replacement of the spoke cover when it is broken is facilitated by removing the locking claw from the spoke against its elasticity. In addition, since the cover can be easily attached, it is suitable for reducing the vibration noise of the cover by increasing the number of places where the cover is attached. Next, an embodiment of the present invention will be described. 1 to 5 show an embodiment of the spoke cover device of the present invention. FIG. 1 is a schematic perspective view of a wheelchair provided with the spoke cover device of the present invention, FIG. 2 is an explanatory view showing a state where the spoke cover device of the present invention is mounted on wheels, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 4 is a front view of the clip of the spoke cover device of the present invention, and FIG. 5 is a side view of the clip of the spoke cover device of the present invention. An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a general self-operating wheelchair. Main wheels 3 are rotatably mounted on both sides of a vehicle body 2 formed by connecting a pipe frame 8 by an axle. A seat 6 forming a seat, and a backrest 7 formed from the seat 6 to a grip 5 formed on the rear upper portion of the vehicle body 2 are provided. The footrest 9 provided and the vehicle body 2 in front of the main wheels 3
A wheelchair 1 is provided with a caster 10 rotatably mounted on a vertical frame of the vehicle, and a person on the wheelchair 1 moves the wheelchair 1 forward and backward by gripping and operating a wheel 11 attached to the outside of the wheel 3 with an interval. , Rotation, etc. The wheelchair 1 has a configuration of a wheelchair having various shapes but generally available on the market. In addition, the wheelchair 1 is provided with a brake device 12, a leg rest 13 for supporting a calf of a person on the wheelchair 1, and the like. I have. According to the present invention, a spoke cover device 20 is provided to prevent a hand or finger from being pulled into the wheel 3 of such a wheelchair 1. Hereinafter, the spoke cover device 20
Will be described. The wheelchair 1 is provided by operating the wheels 3 provided on the left and right sides and the wheels 11 provided on the outside thereof.
In the wheelchair 1 that performs the traveling operation, the wheels 3 are formed on a rim 21 on which tires are mounted on the outer periphery, a bearing portion 23 rotatably mounted on a axle 22 mounted on the vehicle body 2 by bearings, and on both front and rear sides of the bearing portion 23. And a spoke 25 extending between the ring portion 24 and the rim 21.
Reference numeral 26 denotes a cover for covering the spokes 25, the outer shape of which is the rim 2.
It has a diameter slightly smaller than the inside diameter of 1, and is formed in a conical shape or an umbrella shape by synthetic resin molding, and is provided with coloring, patterns, characters, etc. to improve design.
Numeral 30 denotes a clip for attaching the cover 26 to the spoke 25, and a flange 2 for locking the outer surface of the cover 26.
7 and a pair of locking claws 29 that elastically lock the spokes 25 from left and right through a plurality of mounting holes 28 formed in the peripheral portion of the cover 26 from the flange 27 are integrally formed of synthetic resin. . The clip 30 is made of a polycarbonate resin that is easily colored and molded such as white or black or a polyacetal resin that is easily molded with a transparent clip in consideration of matching with the color of the cover 26. Reference numeral 31 denotes a rubber elastic washer that is compressed between the cover 26 and the spoke 25 in a state where the locking claw 29 is locked to the spoke 25. As described above, the spoke cover device 20 includes:
Cover 2 that covers spokes 25 from outside wheelchair wheel 3
6 and a synthetic resin clip having locking claws 29 for elastically locking the spokes 25 from the left and right through a plurality of mounting holes 28 formed in the periphery of the cover from a flange 27 that locks to the outer surface of the cover 26. 30 and the locking claw 29 are the spokes 2
The elastic washer 31 is compressed between the cover 26 and the spoke 25 while being locked to the cover 5. Clip 30
Is formed such that the entrance 30A between the locking claws 29 is sufficiently narrower than half the diameter of the spoke 25, and the interval between the holding portions 30B behind the entrance 30A is wider than the entrance 30A and slightly smaller than the diameter of the spoke 25. ing. As described above, the locking claws 29 of the clip 30
Is inserted into the mounting hole 28 of the spoke cover 26 and pressed from the outside of the spoke cover 26, the flange 27 is locked on the outer surface of the spoke cover 26, and the elastic washer 31 is pressed by the spoke cover 26 and the spoke 25. Further, while the pair of locking claws 29 are opened by the spokes 25, the spokes 25 are finally locked by the elasticity of the pair of locking claws 29 in a state where the spokes 25 are sandwiched by the holding portions 30 </ b> B. By forming an elongated groove 30C toward the flange 27 between the holding portions 30B, there is an effect that the elasticity of the locking claw 29 and the adjustment of the holding position of the clip 30 with respect to the spoke 25 can be automatically performed. . According to the above configuration, the bolt and the nut are easily attached to the spokes as compared with the prior art in which the bolt and the nut are attached to the spokes by tightening with a tool. Furthermore,
When the spoke cover 26 is damaged, the spoke cover 26 can be easily removed from the spoke 25 by pushing the locking claw 29 against its elasticity. The wheel 3 of the embodiment is of a type applied to a normal wheelchair 1, and 28 spokes 25 are provided on the entire wheel 3 and the spokes 25 to which the cover 26 is attached are the same. 7 in the same direction on the circumference
The cover 26 is attached to the spokes 25 at seven locations by clips 30 so as to be at an equal angle. If the number of spokes 25 is larger or smaller than this, it is desirable to attach with the clip 30 at a position at an equal angle on the same circumference. In the present invention, the place where the clip 30 is attached is near the outer periphery of the cover 26. In general, the angle and position of the spokes 25 are different depending on the configuration of the wheel 3 and the distortion of the rim 21, so that the distance between the spokes 25 and the cover 26 is different (variation). The variation in the distance increases as the distance between the spoke 25 and the cover 26 increases toward the bearing 23. Therefore, in the present invention,
The cover 26 is mounted on a circumference near the outer periphery of the cover 26 so as to be mounted at a position close to the rim 21 where the variation in the distance is small. As a result, the slight difference in the gap can be absorbed by the elastic washer 31 and the cover 26 can be attached at an equal interval. In the case of the conventional method using bolts and nuts, it is troublesome to attach the spoke cover using a tool, which is not suitable for increasing the number of attachment points. Since the attachment is easy, it is also suitable to reduce the vibration sound of the spoke cover 26 by increasing the number of locations where the spoke cover 26 is attached. The wheel 3 is removably attached to the axle 22 by a nut 36. Therefore, an opening 37 is formed in the center of the spoke cover 26 in correspondence with the nut 36. Reference numeral 33 denotes a center cover, which is removably fitted into an opening 37 of the spoke cover 26 by an elastic claw 38. An arc-shaped rib 39 is formed on the outer peripheral edge of the spoke cover 26 so as to protrude inward. The outer peripheral edge of the spoke cover 26 is reinforced to prevent injury even if a finger touches this portion. Also, the spoke cover 26
With the elastic washer 31 attached to the spoke 25.
When the annular rib 39 is floated from the spoke 25 due to the thickness of the spoke 25, the transmission of vibration between the spoke cover 26 and the spoke 25 is reduced by the elastic washer 31, and the vibration noise can be reduced. In the above embodiment, the spoke cover 2
The diameter of the spoke cover 26 is made slightly smaller than the diameter of the rim 21 so that human fingers do not enter between the rim 21 of the wheel 3 and the rim 21 of the wheel 3. The spoke cover 26 can prevent the spokes 25 from touching the spokes 25 even when it comes off the wheel 11 and the like, thereby avoiding injury. Normally, the spoke cover 26 is attached to the wheels 3 on both sides.
Attached to the outside surface of Attach the spoke cover 26 while bending the spoke cover 26
It is possible by diving one. If this is not possible, the wheel 11 can be removed from the wheel 3 by removing the nut for attaching the wheel 11 to the wheel 3. The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical scope of the present invention, and the invention includes various embodiments. According to the present invention, when the clip is inserted into the mounting hole of the spoke cover and pressed from the outside of the spoke cover, the locking claw is locked to the spoke with the elastic washer pressed. . For this reason, even when the distance between the spoke cover and the spoke is different due to a variation in the position of the spoke due to deformation of the rim, a variation in the thickness of the spoke cover, or a variation in the dimensions of the clip, the flexibility of the spoke cover is improved. The spokes are supplemented by the compression of the elasticity and the elastic washer, and the spoke cover can be attached without rattling. In addition, the attachment is easier than in the related art in which the bolt and the nut are attached to the spokes by screwing with a tool. In addition, replacement of the spoke cover when it is broken is facilitated by removing the locking claw from the spoke against its elasticity. In addition, since the cover can be easily attached, it is suitable for reducing the vibration noise of the cover by increasing the number of places where the cover is attached.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a wheelchair provided with a spoke cover device of the present invention. FIG. 2 is an explanatory view showing a state in which a spoke cover device of the present invention is attached to a wheel. FIG. 3 is an explanatory diagram illustrating a cross section taken along a line AA in FIG. 2; FIG. 4 is a front view of a clip of the spoke cover device of the present invention. FIG. 5 is a side view of the clip of the spoke cover device of the present invention. [Description of Signs] 1 Wheelchair 2 Body 3 Wheel 11 Wheel 21 Rim 25 Spoke 26 Spoke cover 27 Flange 28 Mounting hole 29 Locking claw 30 … Clip 31… Elastic washer

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-32902 (JP, A) JP-A-3-112701 (JP, A) JP-A-7-164804 (JP, A) JP-A-7-164 323046 (JP, A) JP-A-11-347707 (JP, A) JP-A-2000-262562 (JP, A) JP-A-60-171425 (JP, U) JP-A 1-142301 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) B60B 7/00 A61G 5/02

Claims (1)

(1) A wheelchair in which a wheelchair is operated by operating a wheel provided on the left and right sides and a wheel provided on the outside thereof, wherein the diameter of the wheel is smaller than a diameter of a rim of the wheel. A spoke cover having a diameter and covering the spoke from the outside of the wheel, and a plurality of mounting holes formed in a peripheral portion of the spoke cover from a flange fixed to an outer surface of the spoke cover to elastically attach the spoke from the left and right. A wheel made of a wheelchair, comprising: a synthetic resin clip having a locking claw that locks to the spoke; and an elastic washer compressed between the spoke cover and the spoke in a state where the locking claw is locked to the spoke. Spoke cover device.