JPH0565604U - Chair casters - Google Patents

Abstract

(57) [Abstract] [Purpose] Even though it is a caster for chairs used on carpet, it can be easily used as a caster for P tiles, and
The purpose is to obtain casters for chairs that can be changed in the opposite way and can be used on carpets and P tiles, and are very easy to maintain, even though they are the same casters in appearance. .. A caster comprising two rollers, a roller shaft to which the rollers are rotatably attached at both ends, and a supporting partition through which the roller shaft penetrates. An elastic member is provided between the roller and the supporting partition. is there.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention particularly relates to casters used for chairs.

[0002]

[Prior Art]

 Conventionally, the caster has been rotatably supported on a chair or the like by a swivel shaft attached to a part of a roller supporting partition wall, and the supporting partition wall has roller shafts rotatably holding the rollers at both ends.

In recent years, since chairs are often used on carpets, it has become possible to improve the processing accuracy of the above casters and to make the rollers rotate very smoothly. ..

For this reason, if a chair with the above casters is used on the floor surface of the P tile, the chair may move backward more than necessary due to the rising momentum, and when seated, the chair is at the predicted position. There was nothing, and it could lead to an accident.

Therefore, for the chair used on the floor surface of the P tile, a single-wheel caster having a different appearance from which the rotation of the roller is not so smooth is used instead of the above-mentioned twin-wheel caster.

For this reason, it was necessary to prepare two types of casters for the same chair. In addition, in recent years the floor surface is often finished with different materials, and the rolling of the casters also differs accordingly.Therefore, it is necessary to facilitate casters that suit various floor surface materials, and the shape is more than necessary. The number of casters was supposed to increase.

[0007]

[Problems to be solved by the device]

 The present invention aims to solve the above problems. That is, the present invention is a chair caster used on a carpet, but with the same appearance, a chair caster that can be easily used as a caster for P tile or a caster suitable for various floor surface materials. The task is to provide.

[0008]

[Means for solving the problem]

 The problem is to provide a caster for a chair that can be changed on the contrary and that can be used on a carpet or on a P tile and is very easy to maintain, even though the caster is the same in appearance. To do. In a caster including two rollers, a roller shaft to which the rollers are rotatably attached at both ends, and a supporting partition wall through which the roller shaft penetrates, an elastic member is provided between the roller and the supporting partition wall.

[0009]

【Example】

 FIG. 1 shows a vertical sectional view of the main part of the present invention. Reference numeral 1 indicates a casing, and reference numerals 2 and 2 indicate rollers.

The casing 1 includes a roller casing 11 for concealing the upper half portions of the rollers 2 and 2, a support partition wall 12 vertically formed in the center of the roller casing 11 in the left-right direction, and a roller casing 11. The rotary shaft mounting portion 13 is formed on the upper surface of the rear portion, and is integrally formed of a synthetic resin material.

The support partition 12 has a wall thickness at the lower end in the front-rear direction, and a roller shaft through hole 3 is formed in this. The roller shaft 4 penetrates the roller shaft through hole 3.

A swivel shaft 14 is rotatably attached to the swivel shaft attachment portion 13 in a vertical direction, and an upper end of the swivel shaft 14 is detachably attached to a back surface of a chair leg.

The roller shaft 4 is formed with annular recesses 41, 41 on both left and right ends thereof so that the rollers 2, 2 can be attached freely. The end faces of the annular recesses 41, 41 are formed in an arc shape.

The roller 2 is formed of a synthetic resin material in a disk shape, and has a mounting projection 21 projecting toward the support partition 12 side at the center of the inner surface thereof, and the mounting shaft 21 has the roller shaft 4 therein. A fitting mounting hole 22 for fitting is formed.

An annular convex portion 23 that fits into the annular concave portion 41 of the roller shaft 4 is formed in the inner part of the fitting attachment hole 22, and the rollers are formed by the left and right ends of the roller shaft 4 attached to the support partition wall 12. 2, 2 are fitted in, the annular recess 41 and the annular projection 23 are fitted, and the rollers 2, 2 are rotatably attached to the roller shaft 4.

At this time, the elastic members 5, 5 (corrugated washers in the embodiment) are attached to the roller shaft 4, and the elastic members 5, 5 are attached to the support partition wall 12 when the rollers 2, 2 are attached. It is pressed between the protrusions 31 to control the rotation of the rollers 2, 2.

In the embodiment, the corrugated washers 5 and 5 are provided between the rollers 2 and 2 and the support partition wall 12, and the elasticity of the corrugated washers 5 and 5 increases the frictional resistance to rotate the rollers 2 and 2. Although it is controlled, a spring washer, a coil spring or the like may be used as long as it is an elastic body having a certain degree of elasticity and increasing the frictional resistance between the rollers 2 and 2 and the supporting partition wall 12.

[0018]

[Effect of the device]

 As described above, even if the present invention is a chair caster used on a carpet, the rotation of the roller can be controlled to some extent by interposing an elastic body between the roller and the supporting partition wall, so that the P tile on the P tile can be controlled. It will not rotate unexpectedly even when used in, and the chair will not move unnecessarily backwards due to the momentum when it stood up, resulting in an unexpected accident when sitting. Also, since the elastic body is provided between the support partition and the roller, it is possible to easily obtain casters with different roller rotation characteristics by changing the material and shape of the elastic body (changing the elastic force). Moreover, since the casters are the same in appearance, the design of the entire chair will not be lost even if casters that are on various floors are used.

[0019]

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of the main part of the present invention.

[Explanation of symbols]

 1 Casing 12 Support Partition 2 Roller 4 Roller Shaft 5 Elastic Member

Claims (1)

[Scope of utility model registration request] In a caster comprising two rollers, a roller shaft to which the rollers are rotatably attached at both ends, and a support partition through which the roller shaft penetrates, an elastic member is provided between the rollers and the support partition. Casters for chairs.