JP2014151095A - Rotation table device of revolving chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation table device having a slide member which suppresses excessive rotation motion and is durable for a long-time use when relatively rotating a seat body and leg bodies, in a chair of a revolution type.SOLUTION: Annular protrusions 6, 6' are formed at a peripheral part and an intermediate part of a center shaft 8 fixed to an A-member 3, respectively, at a side opposite to a B-member 4 on a plane of the A-member 3 fixed to a seat body 1, there is employed carbon fiber reinforced plastic 5 for integrally constituting a disc portion which linearly contacts with the annular protrusions 6, 6', and a bush 5' which is fit into a center hole of the B-member 4 and supports the center shaft 8 so as to be turnable, and the B-member 4 which fixes the disc portion on a plane face without impairing a slide effect caused by line contact with the annular protrusions 6, 6' is not deviated from the center shaft 8, and does not impair a prescribed turning function.

Description

  The present invention relates to a turntable device incorporated in a swivel chair.

  Conventionally, the turntable device of the seating specification is configured by connecting the A member fixed to the seat body side and the B member fixed to the leg body side so as to be relatively rotatable by a connecting member. A rolling element to be used is included in the connecting member.

However, for the convenience of the user to change the orientation of the seat in the swivel chair, a rotation function with a moderate resistance sensation is desirable. It is not desirable to increase the rotation that can be said to be excessive, and there is a danger that unexpected accidents may be induced as a result of rotational movement or unstable peristaltic movement sometimes against the user's sense of intention. .
In addition, although there is no problem in the chair body in the process of use, there are many situations in which uncomfortable troubles such as noise and rattling occur frequently in the turntable device relatively early.
This is due to the loss of lubrication of rolling elements such as balls built into the turntable device, as well as due to qualitative metal fatigue, deterioration, etc. There is an unexpected trouble that the powder falls and dyes the floor black. Of course, the turntable device itself is replaceable, but it is also charged, and the actual situation is that there are more complaints from users that the useful life of the turntable device is shorter than that.

JP 2001-197953 A

  The problem to be solved is that by incorporating a member having excellent mechanical characteristics and qualitative characteristics and a sliding effect into the connecting member of the A member fixed to the seat body and the B member fixed to the leg body, An object of the present invention is to provide a turntable device that has excellent sliding rotation and can withstand long-term use.

  In the present invention, an annular convex portion is formed on each of the peripheral portion and the middle portion of the central axis fixed to the A member on the side facing the B member on the surface of the A member fixed to the seat body. A carbon fiber reinforced plastic is used to integrally form a disk part for line contact and a bush part that fits into the center hole of the B member and rotatably supports the center axis. The main feature is that the B member fixed and supported on a flat surface without impairing the sliding effect due to contact does not deviate from the central axis and impair the predetermined rotation function. As a result, the service life was extended and a good feeling of use was maintained, thereby realizing the purpose of dissatisfaction with the user.

  The turntable device of the swivel chair according to the present invention is incorporated in a connecting portion provided between the A member fixed to the seat body side and the B member fixed to the leg body side in order to avoid excessive rotation in the turntable device. The use of a carbon fiber composite material having excellent mechanical and qualitative characteristics as the sliding member is highly functional.

  The carbon fiber composite material according to claim 2 is made of a carbon fiber reinforced plastic having both excellent mechanical characteristics and qualitative characteristics, and is constituted by a disk-like carbon fiber reinforced plastic fixed to the plane of the B member and the A member surface. It is possible to make line contact with a plurality of annular projections without impairing the rotation function, and it is possible to suppress the excessive rotation operation through this characteristic and to enable the sliding rotation function with an appropriate resistance sense. Are better.

The book which employs carbon fiber reinforced plastic 5 as a sliding member incorporated in the connecting portion between the A member 3 fixed to the seat body 1 side and the B member 4 fixed to the leg body 2 side in the turntable device of the swivel chair. 1 is a longitudinal sectional view of a turntable device according to the present invention, FIG. 2 is a front view of the turntable device shown in FIG. 1, and FIG. 3 is a plan view of the turntable device shown in FIG. FIG. 4 is a bottom view of the turntable device shown in FIG.
This will be described in detail with reference to the drawings.

  The turntable device in the turntable device of the swivel chair of the present invention has a substantially square shape in plan view using a rigid metal plate, and the A member 3 and the B member 4 provided with the mounting holes 10 in the seat body 1 and the leg body 2 respectively. It has.

The A member 3 forms a basal plane bottom having a depth with a circumference 3 ′ centering on the center position at the center and having a slight depth, and a center axis that allows the B member 4 to rotate at the center position. One end of 8 is fixedly supported via a knurl 3 ″.
And the annular convex part 6 and 6 'which has some height in the peripheral part and intermediate part of the axial direction of the center axis | shaft 8 are comprised in the plane, respectively. The top portions of the annular convex portions 6 and 6 ′ are hardened so as to enhance the wear resistance and the sliding effect in line contact with the carbon fiber reinforced plastic 5.
A bush 5 'formed of carbon fiber reinforced plastic 5 is inserted into a central hole for inserting the other side of the central shaft 8 whose one end is fixed to the A member 3, so that the central shaft 8 is rotatable. The B member 4 to be provided is a disk plane of the carbon fiber reinforced plastic 5 that is in line contact with the tops of the annular convex portions 6 and 6 ′ that are integrated with the bush 5 ′ portion and formed on the flat portion of the A member 3 An edge portion 7 is formed that surrounds the outer periphery of the portion with a slight height, and is fixedly mounted on the plane of the B member 4 so that the line contact operation with the annular convex portions 6 and 6 ′ is not impaired. ing.
The central shaft 8 that is combined with the B member 4 via the bush 5 'has a slight clearance so that the predetermined sliding rotation between the A member 3 and the B member 4 is not hindered, and the plain washer 9 Deviation prevention of the B member 4 is achieved by forming the caulking portion 8 ′ at the end via the.

  In this way, by incorporating a carbon fiber reinforced plastic member that has excellent mechanical and qualitative characteristics and has a sliding effect, the rotation of the swivel chair that suppresses excessive rotational movement and can withstand long-term use By making it possible to provide a stand device, it is possible to avoid contamination problems around the swivel chair related to deterioration of rolling elements such as balls.

  The turntable device of the swivel chair can be expected to be applied to various uses such as medical care and nursing care as well as a normal living environment in a means that requires an appropriate turning operation.

It is a longitudinal cross-sectional view of the turntable device according to the present invention. Example 1 It is a front view of the turntable apparatus shown in FIG. Example 1 It is a top view of the turntable apparatus shown in FIG. Example 1 It is a bottom view of the turntable device shown in FIG. Example 1

DESCRIPTION OF SYMBOLS 1 Seat body 2 Leg body 3 A member 3 'Circumference 3 "Knurl 4 B member 5 Carbon fiber reinforced plastic 5' Bush 6, 6 'Annular convex part 7 Edge part 8 Center shaft 8' Caulking part 9 Plain washer 10 Mounting hole

Claims (2)

  A rotation of a swivel chair characterized by using a carbon fiber composite material as a sliding member incorporated in a connecting portion provided between an A member fixedly attached to the seat body side and a B member fixedly attached to the leg body side Stand device.   The carbon fiber composite material according to claim 1 is a ring-shaped convex portion configured on each of a peripheral portion and an intermediate portion of a central axis fixedly attached to a central portion of the A member surface on the side facing the B member of the A member, A carbon fiber reinforced plastic that integrally forms a flat portion where the annular convex portion comes into line contact and a bush portion that rotatably inserts a central axis fixed to the A member, and a function of rotating the bush portion with the central axis. Inserting into the central part without damaging it, supporting the flat part of the carbon fiber reinforced plastic without moving in the flat part around the central part, and forming an edge surrounding this outer periphery, impairing the rotation function of the A member The turntable device for a swivel chair according to claim 1, wherein the turntable device comprises:

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