JPH0722123Y2 - Chair assembly mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair assembly mechanism.

[0002]

2. Description of the Related Art In recent years, the manufacture of chairs in which a back portion, a leg portion and a seat portion are molded from a synthetic resin material and are assembled and completed has become popular. However, it is difficult to provide a chair that can be used safely and stably for a long period of time because of various problems in mounting and assembling each part thereof.

For example, in the construction of the back plate, the means for attaching the inner shell plate to the outer shell plate is only to insert the through hole portion of the inner shell plate into the hook portion of the outer shell plate, and in the prior art as shown in FIG. As shown in the figure, the entire shape of the hook part has to be constructed in an oblique direction due to the molding process, so it was inclined upward.Therefore, if a severe shock occurs during handling, the through hole of the inner shell plate The hook portion of the outer shell plate may easily come off from the portion, which has been a drawback in the production of the molded assembly chair.

[0004]

In view of the above, according to the present invention, the outer shell plate and the inner shell plate are securely fixed and assembled so as not to be separated by any impact, particularly in the structure of the back plate. The purpose is to provide a mounting means.

[0005]

According to the present invention, a lower side portion of a hook portion projecting in an obliquely upward direction of an outer shell plate is formed in a horizontal plane, and a hook portion is formed at a tip portion of the hook portion. A through hole is provided at a position of the inner shell plate corresponding to the hook of the outer shell plate, and the hook is fitted into the through hole to form a back plate.

[0006]

When a large shock is applied to the chair currently being handled, a phenomenon occurs in which the through hole portion of the inner shell plate tends to separate from the hook portion of the outer shell plate of the back plate that is just fitted.

However, at that time, even if the inner shell plate is to be pulled out in the vertical direction, the lower horizontal surface portion of the hook portion of the outer shell plate prevents the inner shell plate from being detached from the through hole portion, and the inner shell plate is also prevented. Even if the plate tries to come out in the horizontal direction, the inner shell plate is prevented from being detached from the through hole portion by the hooks at the tips of the hook portions of the outer shell plate.

[0008]

[Embodiment] 1 is a leg made of synthetic resin or other molding, 2
Is a seat plate part, 3 is a back plate part, and 4 is an outer shell plate of the back plate part 3.

Reference numeral 5 denotes a hook portion projecting in a proper position inside the outer shell plate 4, and an upper portion of the hook portion is an inclined surface portion 6 directed obliquely upward. Reference numeral 7 denotes a horizontal surface portion formed on the lower side portion of the hook portion 5 of the outer shell plate 4, and this horizontal surface portion is effective for the action of the inner shell plate 10 which will be described later in the vertical direction. Reference numeral 8 denotes a retaining hook which is formed at the tip of the hook portion 5 of the outer shell plate 4 so as to project in the lateral direction. This retaining hook is effective for the horizontal ejection action of the intershell plate 10 described later. Becomes

Reference numeral 9 denotes a locking claw provided at a portion where the lower horizontal surface portion 7 of the hook portion 5 of the outer shell plate 4 and the distal hook portion 8 are in contact with each other by further extending the distal hook portion vertically. Locks the lower end of the through hole 11 of the inner shell plate 10 described later.

Reference numeral 10 denotes an inner shell plate which is attached to the inside of the outer shell plate 4 of the back plate portion 3. This inner shell plate has a vertically long through hole at a position corresponding to the hook portion 5 of the outer shell plate 4. A section 11 is provided. The hook portion 5 of the outer shell plate 4 is pushed into the through hole portion 11 and fitted therein, and after the fitting, the lower horizontal surface portion 7 and the tip hook portion 8 of the hook portion 5 prevent the retainer from coming off. .

[0012]

[Effect of the Invention] In assembling the back plate portion of the chair, the hook portion of the outer shell plate is pushed into the through hole portion of the inner shell plate to be fitted, whereby the entire hook portion is formed obliquely upward. The vertical or horizontal disengagement phenomenon of both members, which is about to occur at the time of impact, is prevented by the lower horizontal surface of the hook portion in the vertical direction and by the tip hook portion in the horizontal direction. The mounting structure of both members becomes solid.

Therefore, the structural weakness of the molded and assembled chair can be eliminated, and a more practical chair can be manufactured.

[Brief description of drawings]

[Figure 1] Side view of the entire chair

FIG. 2 is a side sectional view of FIG. 1A.

FIG. 3 is a plan sectional view taken along line 2B-B of FIG.

FIG. 4 is a side sectional view of another example of FIG. 1A.

FIG. 5 is a side sectional view of a conventional product of a main part.

[Explanation of symbols]

 4 Outer shell plate 5 Hook part 7 Lower horizontal surface part 8 Tip hook part 9 Locking claw 10 Inner shell plate 11 Through hole part

Claims (3)

[Scope of utility model registration request] 1. A hook portion of the outer shell plate, wherein a lower portion of a hook portion projecting in an obliquely upward direction is formed at a proper position on the outer shell plate in a horizontal plane, and a hook portion is formed at a tip end portion of the hook portion. An assembling mechanism of a chair, characterized in that a through hole is provided at a position corresponding to the inner shell plate, and the hook is fitted into the through hole to form a back plate. 2. In a synthetic resin molding and assembly chair, a lower side portion of a hook portion projecting obliquely upward in a proper position of an outer shell plate is formed in a horizontal plane, and a hook portion is formed at a tip portion of the hook portion. A chair assembly mechanism, wherein a through hole is provided at a position corresponding to a hook of the outer shell plate, and the hook is fitted into the through hole to form a back plate. 3. The chair assembling mechanism according to claim 1, wherein the hook portion of the outer shell plate in contact with the lower horizontal surface portion of the hook portion is extended downward to form a locking claw.