JPH11227404A - Non-turning universal direction wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set two rotary shafts to make a right angle with each other by making the part of a wheel outer circumferential part originally to be mounted with a tire to be a circular shaft, and alternately continuously arranging rollers and cushioning materials rotating in the direction perpendicular to the rotating direction of the wheel on this shaft. SOLUTION: For giving steering ability to a fixed type wheel, in addition to the ordinary moving direction, wheels capable of moving in the quite different direction are required. Then, rollers 3 are arranged setting the edge end part of an ordinary fixed type turning wheel to be the shaft. In short, the shaft 2 of the turning wheel and the shaft of the rollers 3 are made a right angle with each other. When the turning wheel is operated in the fixed advance direction, rotating operation is not generated in the rollers 3, but when force perpendicular to the fixed advance direction is given to the turning wheel, the turning wheel can not be operated and the rotary motion of the rollers becomes maximum. In short, force generated in the area in the square direction constituted by the shaft 2 of the turning wheel and the shaft 5 of the rollers, namely, vector is divided into force to the turning wheel and the rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel which can be used as a fixed wheel in a moving tool having a structure in which a turning surface cannot be obtained and a conventional swivel free wheel cannot be used.

[0002]

2. Description of the Related Art The rudder of a vehicle moving tool without a steering mechanism has been a universal wheel using a turning axis and an eccentric shaft or a ball as a direction wheel.
However, the ball is not suitable for outdoor and large-sized moving equipment because of its ability to cope with steps and to prevent dust. Since the swingable wheel uses a centric shaft, a swing area (area) for changing the direction is essential. This turning area is proportional to the diameter of the wheel. Therefore, it is necessary to secure the turning area by shaving the frame except for the lower portion where the frame does not interfere. In addition, if the body is so close to the wall or the like that the turning area cannot be secured, the universal wheel loses its characteristics as a directional wheel.

[0003]

If there is a directional wheel that does not require a turning area, such as a fixed wheel that faces in one direction, a simple side surface can be used without restricting the shape and structure of the skeleton. It can be mounted as it is, and it is possible to bring out the steering performance even when the skeleton is in close contact with a wall surface or the like. Next, in the case of conventional free wheels, if the diameter of the wheel is increased due to the necessity of dealing with steps, etc., the turning area also increases in proportion, but if turning is unnecessary, it is not restricted by the movement width at the time of turning of the frame It is possible to enlarge only the wheels.

[0004]

In order for a fixed wheel to have steering characteristics, it is necessary to provide a wheel capable of moving in a completely different direction in addition to a normal moving direction. Moreover, it is necessary that steering can be controlled appropriately without impairing stable straight running performance. This requires two orthogonal directions to force the vectors, and no other directions are required. 360
A force traveling in all directions can be decomposed into two perpendicular forces. Based on this, we developed and developed a wheel that has two rotation axes in a right angle direction.

[0005]

The roller is arranged around the edge of the ordinary fixed rotary wheel. That is, the axis of the rotating wheel and the axis of the roller are in a perpendicular direction. When the rotating wheel operates in a fixed traveling direction, the roller does not rotate. When the wheel is subjected to a force in a direction perpendicular to the fixed traveling direction, the wheel cannot operate and the rotational movement of the roller is maximized. The force, or vector, generated in the perpendicular area formed by the axis of the rotating wheel and the axis of the roller is divided by the rotating wheel and the roller. FIG. 2 shows the trajectory drawn by the conventional swivel-type free wheel, and the trajectory followed by the fixed direction wheel of the present invention.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The use of the directional wheel of the present invention without a turning area in a conventional wheelchair does not cause a foot-trap accident during transfer.
In addition, the height of the seat surface can be set regardless of the size of the caster, and the mounting work and the work can be reduced as compared with the conventional case.
Furthermore, if the non-turnable directional wheels of the present invention are used for four wheels, a four-wheel-drive wheelchair capable of going up and down stairs can be realized. When the present invention is used for a walker of a disabled person, straight running performance is improved, and good news can be given to a disabled person who has difficulty using the walker.

[0007]

As described above, in order to promote the social participation of the physically handicapped, it is important not only to improve the infrastructure but also to solve the technical needs for mobile equipment. In particular, wheelchairs are highly dissatisfied with the steps, and the obstacle to solving this problem is the conventional swivel adjustable wheel. The adverse effects of the turning axis are not limited to the turning area, but there are many problems such as kicks due to steps and swings on rough roads. The non-turnable directional wheel of the present invention can solve all the problems of the conventional turnable wheel, and can provide a wheelchair that can cope with a step or a rough road, and various moving tools. In addition, contributions to the industrial and distribution fields, such as saving space for pallet storage and the like, are immeasurable.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure of a non-turnable direction wheel of the present invention.

FIG. 2 shows a trajectory (broken line) on which a non-swivel free-direction wheel of the present invention travels on a trajectory (solid line) of a conventional swivel-type universal wheel.

[Explanation of symbols]

[Fig. 1] 1 spoke 2 wheel rotation shaft 3 roller 4 cushioning material (press spring / rubber) 5 roller rotation shaft

FIG. 2A shows a conventional swivel-axis-type free wheel B non-turnable free-direction wheel of the present invention a a moving direction by a roller b a moving direction by a wheel

Claims (1)

[Claims] 1. A portion of a wheel outer peripheral portion where a tire is to be originally mounted is a circular shaft, and a roller and a cushioning member that rotate in a direction perpendicular to a rotation direction of the wheel are alternately arranged on the shaft. Fixed wheels that can change direction freely without using a turning axis.