JPH07215003A - Furniture casters - Google Patents

Abstract

(57) [Summary] A caster that makes surface contact with the floor. An object of the present invention is to provide a caster that can move a moving object without damaging the floor surface by contacting the floor surface. [Structure] A retainer 4 in which a rope 5 is incorporated as a rolling element is fitted and fixed in a housing 3 of a caster body 1.
The magnetized deformable rotating body 6 is attracted to and integrated with the steel ball 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caster for facilitating the movement of furniture or the like.

[0002]

2. Description of the Related Art Conventional casters include those using disk-shaped wheels and those using balls in the portion in contact with the floor surface. There are one-wheel type (FIG. 3) and two-wheel type using disc-shaped wheels, and the one-wheel type supports the load of a moving object at both ends of an axial center that penetrates the wheel. The formula type has a structure that supports the load of a moving object at the central portion of the shaft center that penetrates the two wheels. The mounting portion of the caster on the moving object and the wheel are eccentric, and the wheel changes its direction according to the moving direction of the moving object. There are a ball type and a ball type in which a shaft penetrates through the center of the ball, and a ball type is one in which about half of the ball is surrounded by small balls and rolling is used (FIG. 4).
In the former, the mounting part of the caster to the moving object and the ball are eccentric as in the case of using the disk wheel, and the ball changes the direction according to the moving direction of the moving object, and the latter changes the direction. It is possible to move in all directions.

[0003]

In the conventional caster, a disc-shaped wheel is used to theoretically make a line contact with the floor surface, and a ball-shaped caster is made to make a point contact.
The load of moving objects is concentrated on the line or point, and the floor on which the casters are located is heavily loaded. Therefore, even if it functions normally on a hard floor such as a flooring or a P tile, wheels or balls sink on a soft floor surface and cannot be easily moved on a tatami mat or a Joutan. Also, wheels and balls that change direction according to the moving direction of the moving object act to pry up the floor surface, damaging the soft floor surface such as tatami mats and sour beans. The problem to be solved by the present invention is to provide a caster capable of smoothly moving a moving object without damaging a soft floor surface such as a tatami mat or a Joutan.

[0004]

[Means for Solving the Problems] A rotating body in a portion in contact with a floor is formed into a sphere. The sphere is made of a rubber-like elastic body that deforms when receiving the load of a moving object, or has a deformable structure in which a viscoelastic body or particles are enclosed in a bag. The sphere is magnetized and held by being attracted to a steel ball incorporated in the housing of the main body as a rolling element by the method of thrust bearing.

[0005]

The sphere of the rotating body, which is in contact with the floor surface of the caster, is crushed by the load of the moving object, and its contact with the floor becomes a circular surface contact. Since the younger sister of the rotating body is magnetically attracted to and held by a steel ball as a rolling body incorporated in the housing of the main body, it can freely rotate in any direction to move a moving object.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. [A] A steel ball holder 4 having steel balls 5 as rolling elements is fitted and fixed in the housing 3 of the main body 1. [B] The rotating body 6 made of a magnetized rubber-like elastic body is attracted to the steel ball 5. [C] Combined and integrated casters have mounting holes 2
Attach it to the part that comes into contact with the floor of the moving object via.

The rotating body 6 includes a rubber-like elastic body, gas,
The bag body 7 is appropriately selected from liquids, viscoelastic bodies, particles, powders, etc. according to the weight of the moving object and other load conditions.
It is used as a rotating body by enclosing it in a deformable spherical shape.

[0008]

The sphere of the rotating body of the caster that is in contact with the floor surface is crushed by the load of the moving object, and the contact with the floor becomes a circular surface contact. This distributes the load of moving objects and reduces the sinking of casters on the floor. The sphere of the rotating body held by the steel ball can roll in all directions and does not need to change direction as a pre-movement step. Therefore, the prying action on the floor does not occur and the floor is not damaged.

[Brief description of drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is an exploded perspective view of the present invention.

FIG. 3 is a front view and a side view of a conventional one-wheel type product using a disc-shaped wheel.

FIG. 4 is a sectional view of a conventional product in which a ball is surrounded by small balls.

[Explanation of symbols]

 1 Main Body 2 Mounting Hole 3 Housing 4 Steel Ball Holder 5 Rope Ball 6 Rotating Body 7 Bag Body

Claims (1)

[Claims] 1. A caster using a deformable rotating body in a portion in contact with a floor surface.