JPH11266957A - Fixing structure of seat board for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of a shell, as well as the handleability of a chair with a blow-molded shell and to facilitate its assembling. SOLUTION: Four parts of and upper shell 14a and the lower shell 14b of a seat part 14 of a blow-molded shell 10 are mutually recess-molded to be abutted to each other to make a screw fitting part 24, and a screw receiving part is formed at a position corresponding to the part 24 of the shell 10 at a seat board 12. Then the board 12 is fitted to the shell 10 by screwing a screw 22 to the screw receiving part while inserting it in the state of fitting the screw receiving part to the part 24 at the time of fixing the board 12 to the shell 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair structure in which a seat plate including a cushion body is mounted on a seat of a shell formed by blow molding.

[0002]

2. Description of the Related Art A chair described in Japanese Utility Model Laid-Open No. 4-86446 is known as a typical example of a conventional chair structure. The chair described in the publication uses a hollow-molded shell, and the backrest portion and the seat portion of the chair are integrated by the shell. A seat plate having a cushion body is attached to a seat of the shell by a metal stopper using a stop hole formed in the shell.

[0003]

SUMMARY OF THE INVENTION
In the chair described in JP 86446, there is a problem that when a force is applied to the cushion body in the horizontal direction, the cushion body is easily detached from the shell and the shell is easily distorted.

Further, since a hole for attaching a cushion body is formed only in the upper surface of the shell, parts such as fasteners may be dropped from the hole into the inside of the shell. There is also a problem that it takes time and effort.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. In a chair having a shell in which a backrest and a seat are integrated by blow molding, the strength of the shell is improved. It is an object of the present invention to provide an easy-to-use chair seat plate mounting structure in which the cushion body does not easily come off from the shell seat portion and is easy to use.

[0006]

The present invention solves the above-mentioned problems as follows. (1) In a chair in which a shell having a seat portion is blow-molded and a seat plate having a cushion body and a skin material is attached to the seat portion of the shell, the seat portion of the shell is provided at a plurality of places, By recessing the shell and the lower shell to each other, the two are abutted or integrated to form a screw mounting portion, and a downward screw receiving portion is provided at a position corresponding to the screw mounting portion of the shell on the seat plate. Protruding,
In a state in which the screw receiving portion is fitted to the screw mounting portion, the mounting plate is inserted into the screw mounting portion from below the seat portion of the shell and screwed into the screw receiving portion, so that the seat plate is connected to the shell. Attach it to the seat.

(2) In the above item (1), a positioning projection is formed on the seat plate, and a recess for fitting the positioning projection is formed on the shell.

[0008]

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a chair to which the mounting structure according to the present embodiment is applied. This chair is shell (10)
And a seat plate (12) attached to the upper surface of the shell (10).

The shell (10) includes a seat (14) and a backrest (16).
And these seats (14) and backrest (16)
It is formed integrally by blow molding a resin such as polyethylene or polypropylene. Shell (10)
The seat (14) has a cushion body (18) and a skin material (2
The seat plate (12) provided with the mounting plate (0) is mounted by four mounting screws (22) in a manner described later.

FIG. 2 is a plan view of the shell (10). Place the seat plate (12) in place along the outer periphery of the shell (10).
A total of four screw mounting portions (24) for mounting to (0) are formed in a manner described later.

FIG. 3 is a sectional view taken along the line III-III of FIG. The seat (14) of the shell (10) has an upper shell (14a) and a lower shell (14) integrally formed by blow molding.
b). The screw mounting part (24) is connected to the upper shell (14
a) and the above four portions of the lower shell (14b) are formed by indentation downward and upward, respectively, during blow molding, and these indented portions are pressed or integrated with each other. Have been. These screw mounts (24)
Is provided with a screw hole (24a) for the mounting screw (22) shown in FIG.

FIG. 4 is a plan view of the seat plate (12), and FIG.
FIG. 5 is a sectional view taken along line VV of FIG. As shown in FIGS. 4 and 5, the seat plate (12) is provided with a positioning projection (26) having a cross shape in a plan view at a position substantially rearward of the center. On the other hand, a concave portion (28) is formed at a position corresponding to the positioning projection (26) on the upper surface of the seat (14).

For this reason, at the time of assembling, the seat plate (12) is connected to the shell (14) while the positioning projections (26) are fitted into the concave portions (28) formed in the seat portion (14) shown in FIG. By mounting on the seat 10), the seat plate 12 is positioned with respect to the shell 10 so that the chair can be easily assembled.

As shown in FIGS. 4 and 5, on the lower surface of the seat plate (12), a screw receiving portion (30) into which the mounting screw (22) is screwed is provided.
It is protruded in places. These screw receivers (30) are shown in FIG.
Mating with the screw mounting part (24) shown in
The mounting screw (22) inserted into the mounting portion (24) from below is fixed by a screw.

Next, the order of assembling a chair to which the seat plate mounting structure of the present embodiment is applied will be described.

FIG. 6 is a side sectional view showing the chair in an assembled state. First, the cushion body (18) and the facing material (20) are attached to the seat plate (12) in advance.

Next, while the screw receiving portion (30) of the seat plate (12) is fitted to the screw mounting portion (24) of the shell (10), the shell (10) is
Place on. At this time, the positioning projection (26) is
The fitting of the seat plate (12) with respect to the shell (10) in the front, rear, left and right directions is easily performed because the fitting is performed in the concave portion (28) of (0).

In this state, each screw mounting portion (2
The screw (22) is inserted from below and screwed into the screw receiving portion (30), and the seat plate (12) is fixed to the shell (10). Then, the shell (10) is attached to the leg portion (32) by a mounting bracket to which a bolt and a nut (34) are welded. As a result, the seat plate (12)
Are mounted as shown in FIG.

As described above, according to the present embodiment, the shell
The upper shell (14a) and the lower shell (14b) of (10) are concavely formed with each other to press or integrate them to form a screw mounting portion (24), and this screw mounting portion (24) is formed. ), The seat plate (12) is fixed by inserting a screw (22) into the screw receiving portion (30). For this reason, it is possible to prevent the cushion body (18), which is a problem of the conventional chair, from being shifted laterally, from falling into the inside of the shell (10) of the mounting bracket, and the like. It is possible to fix to.

Further, since the shell (10) is formed by indentation, the shell (10) can be formed without increasing the thickness of the shell (10).
Can improve the strength and rigidity. for that reason,
The material required for manufacturing the shell (10) can be reduced, and the manufacturing cost of the chair can be reduced.

In this embodiment, the seat (14) and the backrest (1
6) and the chair in which the mounting structure of the present invention is applied to the integrally molded chair.However, the present invention is not limited to this, and the seat (14) and the backrest (16) are separated. The present invention is also applicable to an existing chair or a chair having only the seat (14).

[0023]

According to the present invention, the following effects can be obtained. (a) According to the invention of claim 1, since the strength and rigidity of the shell can be improved, a chair with high durability can be provided.

(B) According to the second aspect of the invention, the positioning plate is formed on the seat plate, and the positioning plate is fitted to the recess formed in the shell, and the seat plate is attached to the shell. Therefore, at the time of assembling, the seat plate can be easily positioned with respect to the shell, and the assembling work of the chair becomes easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of a chair to which a mounting structure according to the present invention is applied.

FIG. 2 is a plan view of a shell used in the chair of the embodiment.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a plan view of a seat plate of the chair according to the embodiment.

FIG. 5 is a sectional view taken along the line VV of FIG. 4;

FIG. 6 is a side sectional view showing a chair assembled by the mounting structure of the embodiment.

[Explanation of symbols]

 (10) Shell (12) Seat plate (14) Seat (16) Backrest (18) Cushion body (20) Skin material (22) Screw (24) Screw mount (24a) Screw hole (26) Positioning protrusion (28) Recess (30) Screw receiver (32) Leg (34) Bolt and nut

Claims (2)

[Claims] 1. A chair comprising: a shell having a seat portion blow-molded; and a seat plate having a cushion body and a skin material attached to the seat portion of the shell, wherein the seat portion of the shell is provided at a plurality of locations. The upper shell and the lower shell are recessed into each other to abut or integrate them to form a screw mounting portion, and a downward screw receiver is provided at a position corresponding to the screw mounting portion of the shell on the seat plate. In the state where the screw receiving portion is fitted to the screw mounting portion, the mounting screw is inserted through the screw mounting portion from below the seat portion of the shell and screwed into the screw receiving portion in a state where the screw receiving portion is fitted to the screw mounting portion. A seat plate mounting structure for a chair, wherein a seat plate is mounted on a seat portion of the shell. 2. A seat plate mounting structure for a chair according to claim 1, wherein a positioning projection is formed on the seat plate, and a concave portion is formed in the shell for fitting the positioning projection. .