JP2001191708A - Level difference running-on device of universal caster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change a shape of caster wheels, and to obtain an effect of approaching a wholly barrier-freed normal state for smoothly running on and getting over a level difference being a great enemy of wheelchairs in these days when there are abundantly dangers of hindering the passing and meeting with an accident or trouble since there is the level difference everywhere such as the outside of a house and clearance of a roadway in a railroad crossing when persons living on the wheelchairs go outside. SOLUTION: For enabling wheelchairs to smoothly run on and get over a level didfference, a shape of caster wheels of two wheels having a universal front wheel is formed in a Japanese abacus bead shape, a part of the wheels is formed of rubber or a material corresponding to it, hardness is obtained by a substance having frictional force and resiliency such as rubber, the part is made nonslipping by a pattern, a laterally coming-out rate of the wheels is set equal to a radius of the wheels, a cross section is formed as a drawing in a rhombic shape, and even if a cross section is changed to a spherical state from the rhombic shape by a using frequency in the caster wheel, or even if a spherical shape becomes a flat state, the original function is not lost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a wheelchair and other vehicles using casters, when a road or other floor has a step or an irregular surface while moving, the movement is hindered, and the step other than at a right angle to the step It is difficult to get on and over, and if you apply a force that pushes it up diagonally, you can get on and get over. In the case of a wheelchair, you can easily get on and advance alone without any assistance. In the case of railroad crossing crossing, worry about falling in the gap between the tracks is eliminated

2. Description of the Related Art In casters such as a wheelchair or a trolley up to today, if there is a step on a curb, the free parts of the front wheel of the wheelchair and the rear wheel of the trolley become obstacles and advance at right angles to the step. Otherwise, a force that tries to move parallel to the step is applied, stops at that position, and if a wheelchair assists, there is a front lifting caster on the step to continue the movement. When proceeding alone,
It is the current situation of climbing with momentum so as to make a right angle several times, especially in the case of wheelchairs It is possible for people with physical strength but it is still unbalanced and there are many cases where it falls down But if you drop in parallel,
Leading to a major accident

Problems to be Solved by the Invention According to the present invention, it is said that it is the present situation that people with physical disabilities go out due to road conditions and the like even when they want to go out on a wheelchair. It is impossible to eliminate the gaps between the roads nationwide and maintain the roads and sidewalks properly and eliminate the gap between the railroad crossings, so it seems that it is impossible to improve the caster wheels so that it can proceed smoothly anywhere. Has proven that it is possible

Means for Solving the Problems A step riding device of the present invention is configured such that a wheel portion of a free caster is made into an abacus ball shape in an advancing direction and a force is applied obliquely in a lateral direction. In a wheelchair, it is easy to get on the step and continue the movement simply by applying a little force to the wheel.The height of the step is up to the radius of the caster. It is possible to get on without having to turn the wheel at 90 degrees

[0005] In the case of a wheelchair,
As shown in Fig. 1, the front wheels reach above the steps by lifting and pushing the abacus ball-shaped wheels as shown in Fig. 1.

A wheelchair is a so-called self-propelled wheelchair, in which a caster having a freely adjustable front wheel is overwhelmingly used, so that it is possible to get on and over a step in a horizontal or diagonal state. In the case of, even if the direction is parallel to the step, you can ride over the step by applying force with a sense of twisting so that the driving wheel on the step side is backed and the wheel on the opposite side moves forward, so that you can get over the step , Even if an assistant is attached, the operation of lifting the front wheel is no longer necessary. The abacus ball-shaped wheel is made of rubber or a material similar to that, except for the part that keeps the shaft, to provide an anti-slip effect. Even with a folding wheelchair, the effect of which can be increased by adding irregular patterns to reduce the fold, there is no hindrance to the folding, and by replacing the casters, Also chair, also in a wheelchair of the retrofit can be also electric front-wheel-drive, it is stable running.

[Brief description of the drawings]

FIG. 1 is a perspective view of a caster wheel as viewed from the front.

FIG. 2 is a view in which a step is lifted up and a convex portion on the side of the caster is cut into the step.

[Explanation of symbols]

 1 is a caster shaft 2 is a bearing bracket 3 is a rubber cross section of the wheel of the caster 4 is a caster shaft 5 is a bearing bearing 6 is a nut for stopping the shaft 7 is a non-slip projection 8 is a stepped portion

Claims (1)

[Claims] 1. Principles utilizing the side surfaces of wheels, in which wheels of casters are nearly spherical and have an abacus-shaped cross section so that steps can be run even from an oblique direction. Mounted on wheels, including driving wheels, stabilizes driving in undeveloped wilderness and mountainous areas