JPH11309037A - Chair seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unnecessitate providing a reinforcing rib in the shell of a chair seat, to make the small thickness structure of the shell itself and to improve the design of the seat. SOLUTION: A recessed part 30a onto which the projecting part 29a of a seat outer shell 29 is abutted is provided at a seat fixing metal fitting 30. Then, the recessed part 29b of the shell 29 and the outer peripheral part 30b of the metal fitting 30 are away from each other to prevent the breakage of the shell 29 to make the metal fitting 30 function as a structure body receiving a load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a chair seat.

[0002]

2. Description of the Related Art A typical known example of a chair seat is disclosed in Japanese Patent Laid-Open No. 8-38299. This chair has a structure in which the outer shell itself receives the load. That is, a metal reinforcing member is attached to a portion corresponding to a seat of the outer shell, and the outer shell is fixed in a state where the outer shell is pressed between the reinforcing member and the seat receiving member, so that the outer shell functions as a structure. I have to.

[0003]

However, in the chair seat described in the above-mentioned publication, since the outer shell has a function as a structural body, the outer shell has a thick structure, which leads to an increase in weight. There's a problem.

Further, in order to increase the strength of the outer shell, it is necessary to provide complicated reinforcing ribs on the surface of the outer shell. Therefore, the structure of a mold for forming the outer shell is complicated, resulting in an increase in cost. Moreover, the presence of the reinforcing ribs deteriorates the appearance of the chair itself. Further, when a plurality of reinforcing ribs are provided on the surface of the shell, there is a problem that it takes a long time to form the outer shell and the manufacturing efficiency is poor.

The present invention has been made in view of the above-mentioned problems of the prior art, and does not require the provision of reinforcing ribs on the outer shell of the chair, and the entire shell can be reduced in weight by a thin structure. It is an object of the present invention to provide a chair seat excellent in design.

[0006]

The present invention solves the above-mentioned problems as follows. (1) A seat is formed on the upper surface of a seat mounting bracket having a central metal fitting provided with a mounting portion for a pillar at a lower portion, and a pair of left and right supporting metal parts extending horizontally from both sides of the central metal fitting. A cushion material, a seat inner shell, a seat outer shell, and the like are attached to the seat outer shell, and a convex portion is formed on the seat outer shell, with which the concave portion of the seat mounting bracket comes into contact. Is supported by the seat mounting bracket, and the outer shell of the seat and the outer peripheral edge of the seat mounting bracket are separated from each other.

(2) In the above item (1), the central fitting and the support fitting are made of different members, and the seat fitting is formed by joining these fittings.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a chair seat according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a chair provided with a seat according to the present embodiment, as viewed from the upper front, and FIG. 2 is a side sectional view of a main part of the chair of FIG.

As shown in FIG. 1, this chair includes a backrest (10), a seat (12), legs (14) and the like.

The backrest (10) is vertically movably mounted along a backrest rod (16) having a lower end fixed to a seat mounting bracket described later. The back part (10) is made of skin material (1
8), back cushion material (20), inner shell (22), outer shell (24), etc., skin material (18) and back cushion material
(20) is attached to the inner shell (22) by a known means. Inner shell (22) and outer shell
The attachment with (24) is performed by screwing both.

The seat portion (12) includes a seat cushion (26), a seat inner shell (28), a seat outer shell (29), a seat mounting bracket (30), and the like. As shown in FIG. 2, the seat cushion material (26) is stretched on the upper surface of the seat inner shell (28), and the seat mounting bracket (30) includes a seat inner shell (28) and a seat outer shell (29). I support.

The seat outer shell (29) has a seat mounting bracket.
(30) is provided with a convex portion (29a) that comes into contact with the concave portion (30a), and the load applied to the seat is reduced by the seat mounting bracket (30) via the seat inner shell (28) and the seat outer shell (29). ). The outer peripheral portion of the seat outer shell (29) extends outward beyond the seat mounting bracket (30).

[0014] The recess (29b) of the seat outer shell (29) and the outer peripheral edge (30b) of the seat mounting bracket (30) are spaced apart from each other by a predetermined distance. ) And outer edge (30
b) to prevent the seat outer shell (29) from being damaged during use of the chair.

FIG. 3 is a plan view of the seat mounting bracket (30), and FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in FIG. 3, the seat mounting bracket (30) includes a center bracket (32) and a pair of left and right support brackets (34a) (34b) welded to the center bracket (32). As shown in FIG. 4, the central bracket (32)
Is formed in an upwardly facing U-shaped box shape when viewed from the front, and has a central box-shaped portion.
(32a) is provided with a mounting cylinder (36) into which the upper end of the pillar (14a) of the leg (14) fits.

FIGS. 5 and 6 are enlarged views of the center metal part (32). The center metal part (32) is formed by processing the upper edge of a box-shaped part (32a) made of an iron plate by sheet metal processing or the like. Iron plate (3
It is configured by welding to the lower surface of 2b). The back of the chair (32a) shown in FIG.
The lower end of 6) is tiltably attached by a pin (38) facing left and right.

The support brackets (34a) and (34b) are provided with reinforcing irregularities by press molding, and are provided with a seat inner shell.
(28) and the seat mounting bracket (3
The strength against the load applied to 0) is secured. That is,
The seat mounting bracket (30) is made to function as a structural material for receiving a load. For this reason, the seat inner shell (28)
Also, the strength of the seat outer shell (29) is not so required, and the shell itself can be made thin.

Mounting holes (40) (40) for mounting the seat inner shell (28) are formed in both rear ends of the center metal fitting (32).
As shown in the figure, the screws (42) allow the outer shell (29)
And is fixed to the seat inner shell (28).

As described above, according to the present embodiment, the function of the structure for receiving the load applied to the seat is provided to the seat mounting bracket (30), so that the seat inner shell (28) and the seat inner shell (28) are provided. The seat outer shell (29) can be made thinner, and the entire chair can be reduced in weight.

Further, since it is not necessary to provide reinforcing ribs on the seat inner shell (28) and the seat outer shell (29),
The appearance is improved in design, and the structure of the mold for molding the shell can be simplified, so that the cost can be reduced. In addition, since the molding time of the shell is short, the production efficiency is improved.

In the present embodiment, the seat bracket (30) is formed by welding the central bracket (32) and the support brackets (34a, 34b) as separate members made of iron. It is also possible to use a punched material or the like that is integrally formed without using welding.

[0022]

According to the present invention, the following effects can be obtained. (a) According to the first aspect of the present invention, the outer shell and the inner shell of the seat can be reduced in thickness, so that the weight of the entire chair can be reduced. In addition, since it is not necessary to provide a reinforcing rib on the shell, the design is improved, and the mold structure for forming the shell can be simplified, and the manufacturing cost can be reduced.

(B) According to the second aspect of the present invention, since the seat mounting bracket is constituted by combining a plurality of members, it is possible to use an inexpensive iron member, thereby reducing the cost of the chair as a whole. It is planned.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a chair according to an embodiment of the present invention as viewed from the upper front.

FIG. 2 is a sectional side view of a main part of the chair in FIG.

FIG. 3 is a plan view of a seat mounting bracket.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged plan view of a central fitting.

FIG. 6 is also a front view of a central fitting.

[Explanation of symbols]

 (10) Backrest (12) Seat (14) Leg (14a) Pillar (16) Backrest rod (18) Skin material (20) Back cushion material (22) Inner shell (24) Outer shell (26) Seat Cushion material (28) Seat inner shell (29) Seat outer shell (29a) Convex part (29b) Concave part (30) Seat mounting bracket (30a) Concave part (30b) Peripheral edge (32) Central bracket (32a) Box shape (32b) Plate (34a) (34b) Support bracket (36) Mounting cylinder (38) Pin (40) Mounting hole (42) Screw

Claims (2)

[Claims] 1. A seat mounting bracket having a central fitting having a mounting portion for a pillar provided at a lower portion thereof, and a pair of left and right supporting fittings extending horizontally from both sides of the central fitting. The cushion material, the seat inner shell and the seat outer shell etc. are attached, and this seat outer shell is
The concave portion of the seat mounting bracket forms a projecting portion that abuts, and the concave portion and the projecting portion abut on each other, so that the load applied to the seat is supported by the seat mounting bracket, and the seat outer shell and the outside of the seat mounting bracket. A chair seat characterized by being separated from a peripheral portion. 2. The chair seat according to claim 1, wherein the central fitting and the support fitting are made of different members, and the fittings are formed by joining these fittings.