JP2001178578A - Revolving chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a seated person from being discomforted by maintaining the smooth rotation of a seat body and making the seat body rotatable. SOLUTION: A rotating deice 8 is housed in a space part formed between a leg body 1 and the seat body 17. A fixing plate 9 below the rotating device 8 is fastened to the upper surface of the leg body 1, and a rotating plate 10 above the rotating device 8 is fastened to the lower surface of the seat body 17. A finger-tip-insertable recessed part S is provided between the lower surface of the peripheral part of the seat body 17 and the upper surface of the leg body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a swivel chair having a rotatable seat on a leg.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show an example of a conventional swivel chair of this kind, in which a leg (1) has a horizontal U-shaped upper part of two downwardly extending legs (2). The rods are formed by connecting the rods at a right angle, and the vertical legs of the two leg rods (2) are slightly widened outward.

On the upper surface of the leg (1), a bottom plate (4a) of a steel plate (4) of a circular seat (3) in a plan view is fixed from below by a plurality of bolts (5). ing. An annular seat frame (4b), whose vertical cross-section rises in a downward U-shape, is bent around the periphery of the seat plate (4), and a seat body (3) Are rotatably accommodated. Upper part of the inner peripheral surface of the seat frame (4b) and cushion material (6)
An annular V-shaped groove (7) that opens to the upper surface is formed between the outer peripheral surface and the outer peripheral surface.

On the upper surface of the bottom plate (4a) and on the lower surface of the cushion material (6), a rectangular fixing plate (9) in the rotating device (8) is provided.
And the rotating plate (10), each of the four corners of the bolt (5)
And fixed by bolts (11) so that they are mounted in close proximity to each other and between the fixed plate (9) and the rotating plate (10).
A disc-shaped retainer (12) is inserted. The three members overlapping each other are connected to a pivot (1
3) is pivotally mounted so as to be relatively rotatable in the horizontal direction.

[0005] On the opposing surface of the fixed plate (9) and the rotating plate (10),
An annular concave groove (14) centering on the pivot (13) is formed to face each other. At a plurality of locations on the circumference of the retainer (12) facing the annular concave groove (14), circular holding holes (15) are formed, and each holding hole (15) has a retainer (12). A rotating ball (16) having a diameter larger than the thickness is loosely fitted.

The upper and lower end faces of the rotating ball (16) projecting from the holding hole (15) rotatably contact the fixed groove (14) of the fixed plate (9) and the rotating plate (10), whereby the seat is seated. Person is a sitting body
(3) can be freely rotated in a desired direction.

[0007]

However, in the above-mentioned conventional swivel chair, dust, food and the like adhere to the annular V-shaped groove (7) depending on the use environment for a long time or the use environment such as a dining room. And the frictional resistance or dust or the like intrudes into the concave portion of the seat plate (4), and
Due to the frictional resistance when it is attached to each member of (8),
The rotation of the seat body (3) may not be smooth.

Further, since the seat body (3) is structured to rotate inside the seat frame (4b) of the seat plate (4), the seat body (3)
When the is rotated, a part of the buttocks of the occupant touches the upper surface of the non-rotating seat frame (4b), causing a problem that unpleasant friction occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. By eliminating a gap into which dust or the like enters, the rotation of the seat body is kept smooth, and the entire seat body is made rotatable. It is an object of the present invention to provide a swivel chair capable of preventing a person from feeling uncomfortable.

[0010]

According to the present invention, the above-mentioned problem is solved as follows. (1) A swivel chair in which a circular seat in a plan view is rotatably mounted on an upper part of a leg whose lower part is opened via a rotating device provided between the lower part and the upper part of the leg. A rotating device is accommodated in a space formed between the leg and the seat, and a fixed plate below the fixed device is fixed to an upper surface of the leg, and an upper rotating plate is fixed to a lower surface of the seat, respectively. A concave portion into which a fingertip can be inserted is provided between the lower surface of the outer peripheral portion of the seat and the upper surface of the leg.

(2) In the above item (1), the rotary plate is formed integrally with a seat plate forming a part of the seat body.

(3) In the above item (1) or (2), an annular projection which covers the outer periphery of the rotating device and whose lower end is close to the upper surface of the leg is provided inside the concave portion on the lower surface of the seat body. .

[0013]

1 and 2 show an embodiment of the present invention. The same members as those in the above-described conventional example are denoted by the same reference numerals, and detailed description thereof will be given. Omitted.

The seat (1) of the present invention corresponding to the conventional seat described above.
The seat plate (18) in (7) has a double disk shape with a small gap sealed between the upper plate (18a) and the lower plate (18b), and the outer peripheral portion has an upper surface. The seat frame (18c) gently tilts down.

On the lower surface of the lower plate (18b) near the outer periphery near the seat frame (18c), a downward annular projection (18d) is provided so that its lower end is close to the upper surface of the leg (1). The hand, the finger, etc. are prevented from being inserted into the gap between the leg (1) and the seat plate (18).

On the lower surface of the seat frame (18c), a recess (S) into which a fingertip can be inserted is formed outside the annular projection (18d).

The upper surface of the upper plate (18a) except for the seat frame (18c) is slightly recessed, and the cushion material (6) is placed and fixed in the recess.

Between the lower plate (18b) and the leg (1), the fixed plate (9) and the rotating plate in the rotating device (8) are arranged in the same manner as in the conventional example.
(10) and a retainer (12) are incorporated and their centers are pivoted by a pivot (13). The fixing plate (9) and the leg (2) are connected by bolts (19), and the rotating plate (10) and the seat plate
(18) and the cushion material (6) are fixed by bolts (20) inserted from below the rotating plate (10).

As in the conventional case, the seat (17) is formed by fixing the upper and lower surfaces of the rotating ball (16) loosely fitted into the holding hole (15) of the retainer (12) to the fixed plate (9) and the rotating plate (10). It can be rotated around the pivot (13) by making contact with the inside of the annular concave groove (14).

On the upper part of the leg (1), a bottomed circular dish-shaped cover (21) for covering the lower surface and the side of the rotating device (8) is provided, as shown in FIG. The annular piece (21a) is elastically engaged with the four horizontal engagement grooves (22) formed on the upward annular piece (21a) on the upper horizontal rod of each leg rod (2), so that the lower plate (21a) is It is detachably attached so as to approach and face the inner surface of the annular projection (18d) of (18b).

The present invention is not limited to the above embodiment. In the above embodiment, the seat plate (18), which is a part of the seat body (17), has a double hollow plate shape in order to ensure strength, but may have a single disc shape. At this time, it is preferable that the processing of the outer peripheral edge is bent so as to be rounded downward. In order to reduce the number of parts, the rotating plate (10) of the rotating device (8) may itself be a seat plate (18).

[0022]

According to the first aspect of the present invention, since the seat body is directly attached to the rotating plate of the rotating device, a gap is formed in the outer peripheral portion of the upper surface of the seat body as in the conventional case, and the gap is formed in that portion. There is no danger of dust accumulating or invading and adhering to the rotating device, and the seat can be smoothly rotated for a long period of time, and the entire seat rotates, so the buttocks of the seated person There is no unpleasant friction on the part. Further, the chair can be easily carried by placing a finger on the concave portion on the lower surface of the outer peripheral portion of the seat body.

According to the second aspect of the present invention, since the number of parts is reduced, it can be implemented at a low cost.

According to the third aspect of the present invention, there is no danger that the occupant who is rotating may inadvertently insert his or her hand, finger, or the like into the rotating device or the like below the seat body, which is safe.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a swivel chair according to the present invention.

FIG. 2 is an enlarged front elevational view of a main portion of a main portion, similarly.

FIG. 3 is an exploded perspective view of a conventional swivel chair.

FIG. 4 is an enlarged front elevational view of a main part of the main body, similarly.

[Explanation of symbols]

 (1) Leg (2) Leg (3) Seat (4) Seat (4a) Bottom (4b) Seat frame (5) Bolt (6) Cushion (7) V-shaped groove (8) Rotating device ( 9) Fixing plate (10) Rotating plate (11) Bolt (12) Retainer (13) Axle (14) Annular groove (15) Holding hole (16) Rotating ball (17) Seat (18) Seat plate (18a) Upper plate (18b) Lower plate (18c) Seat frame (18d) Annular protrusion (19) (20) Bolt (21) Cover (22) Engagement groove (S) Recess

Claims (3)

[Claims] 1. A swivel chair having a circular seat when viewed from above and rotatably mounted on an upper portion of a leg whose lower portion is opened via a rotating device provided between the lower portion and the upper portion of the leg. , A rotating device is housed in a space formed between the leg and the seat, and a lower fixed plate is fixed to an upper surface of the leg and an upper rotating plate is fixed to a lower surface of the seat, respectively. A swivel chair further comprising a concave portion into which a fingertip can be inserted, between a lower surface of an outer peripheral portion of the seat and an upper surface of the leg. 2. The swivel chair according to claim 1, wherein the swivel plate is formed integrally with a seat plate forming a part of the seat body. 3. The swivel chair according to claim 1, further comprising an annular projection which covers an outer periphery of the rotating device and has a lower end close to the upper surface of the leg, inside the concave portion on the lower surface of the seat body.