JP2001294006A - Wheel chair with overguard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To run even if there a step and pebbles. SOLUTION: An overguard 8 capable of riding out smoothly the step and the pebbles is mounted on an arm 4 of a universal wheel being a front wheel of a wheel chair. When the overguard 8 touches an obstacle, the overguard 8 is lifted for engaging an inward ring 7 with gear mounted on an upper end of the overguard 8 with an outward ring with gear mounted on a shift 1 of the universal wheel to prevent yawing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair having a function of getting over a step or a pebble.

[0002]

2. Description of the Related Art A conventional wheelchair has a small front wheel due to its structure.

[0003]

In a conventional wheelchair, the front wheels are small (about 10 cm), so that the vehicle cannot run if there is a slightly large step or pebbles.

[0004]

In order to solve the above-mentioned problems, the present invention can overcome a step or a pebble even if it is present. Also, by attaching a ring with gears, it is possible to prevent swinging when riding on an obstacle.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has an overguard attached to a frame of a front wheel of a wheelchair, and has an anti-swing ring at an upper portion thereof.

[0006]

Embodiments will be described with reference to the drawings.
An outward gear ring (2) is attached and fixed to the shaft (1) of the wheelchair front wheel in FIG. Next, the overguard (8) in FIG. 3 is bolted together with the holes (5) and (9) of the frame (4) of the front wheel.

[0007]

The present invention is embodied in the form described above and has the following effects.

[0008] By attaching an overguard to a wheelchair, it is possible to get over a step or a pebble.

When the overguard (8) hits an obstacle (FIG. 8), the overguard is lifted and the inward gear (7) is raised.
And the outward gear (2) mesh (FIG. 9) to prevent swinging.

[0010] Even if the vehicle hits an obstacle, the obstacle moves from the advance and the overguard to the wheel, and the overtaking is completed.

When the obstacle moves to the wheel, the overguard is lowered by its own weight, and the inward gear (7) and the outward gear (2) are separated, so that the wheel becomes free.

[Brief description of the drawings]

[Fig. 1] Forward and backward movement of a wheelchair with overguard

FIG. 2 Front wheel before installation of overguard

FIG. 3 Overguard

FIG. 4 is a side view of mounting an overguard.

FIG. 5 is a top view of mounting an overguard.

FIG. 6 is a rear view of mounting the overguard.

FIG. 7 is a front view of mounting an overguard.

FIG. 8 When the overguard rides over an obstacle

FIG. 9 shows the state of the gear at the time of the above.

FIG. 10 when the overguard is traveling on a flat ground.

FIG. 11 shows the state of the gear at the time of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, Shaft 2, Ring with anti-swing gear 3, Universal joint 4, Frame for wheels 5, Overguard mounting hole 6, Wheel 7, Ring with anti-swing gear 8, Overguard 9, Overguard mounting hole 10, Over Guard mounting bolt 11, obstacle

Claims (4)

[Claims] 1. A wheelchair equipped with an overguard (8) that can smoothly ride over steps and pebbles. 2. A wheelchair according to claim 1, wherein the overguard (8) is mounted on the arm (4) of the universal wheel. 3. The wheelchair according to claim 2, wherein an inward geared ring (7) for preventing a swing is attached to an upper end of the overguard (8). 4. The wheelchair according to claim 2, wherein an outward gear ring (2) for preventing a swing is attached to a shaft (1) of the universal wheel.