JP2001128804A - Cushion body mounting structure of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushion body mounting structure of a chair which facilitates mounting of a cushion body and prevents deformation and failure by the undue load exerted on mounting portions in use. SOLUTION: An elastic holding plate 6 of which the holding port 6a is directed toward the inner side of the cushion body 1 is secured near to one side edge 1a of the rear surface of the cushion body 1 molded to meet the external form of a base plate 2 for a chair in a seat part or chair back. The one side edge 1a of the bas plate 2 for the chair is held by press fitting to the elastic holding plate 6 and engaging projections 9 projectingly disposed in the positions corresponding to a plurality of engaging holes 8 formed at the base plate 2 for the chair are fitted and detained into the engaging holes 8 pierced at a mounting plate 7 which is secured along the other side edge 1b on the rear surface of the cushion body 1 and has a strip shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion mounting structure for an office chair or the like equipped with casters.

[0002]

2. Description of the Related Art For example, JP-A-9-28505 and JP-A-2-6505
As described in Japanese Patent No. 3414, there is known a cushion body mounting device for a chair in which engagement projections are fitted and locked in a large number of engagement holes formed in a peripheral side edge of a substrate provided with a cushion body. It is.

[0003]

In such a conventional apparatus, since the substrate is attached to the entire back surface of the cushion body, the weight increases as the whole and the larger the cushion body, the more the cushion body is required for mounting. A work of fitting and locking a large number of engagement holes drilled along the peripheral edge of the back surface of the back surface of each of the engagement projections at positions corresponding to the engagement holes of the cushion body. Is troublesome. Further, the cushion body and the two shells are flexed and deformed by being pressed by the body of the seated person, and the engagement hole or the engagement projection to which a large load is applied may be damaged.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a structure for attaching a cushion body to a chair, in which the cushion body can be easily attached, and in use, an excessive load is applied to the attachment section so that the cushion body is not deformed and damaged. It is intended to provide.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) In the vicinity of one side edge of the back surface of the cushion body formed according to the outer shape of the chair substrate in the seat portion or the backrest,
An elastic holding plate with a holding opening facing the inside of the cushion body is fixed, one side edge of the chair substrate is pressed and held on the elastic holding plate, and the other side of the back surface of the cushion body. A plurality of engagement holes formed in a band-shaped mounting plate fixed along the edge, engagement protrusions formed on the chair substrate and projecting at positions corresponding to the engagement holes. , Engage and lock.

(2) In the above item (1), the skin material covering the cushion body is folded back at one side edge of the cushion body to the back side, and an elastic holding plate is fixed to the inside of the folded skin material.

(3) In the above item (1) or (2), the engaging head for engaging the engaging projection of the chair substrate with the inner surface of the engaging hole formed in the mounting plate of the cushion body has a tip. It shall be provided in.

(4) In any one of the above items (1) to (3), the chair substrate is used as a backrest plate, and an elastic holding plate is fixed near an upper side edge of the cushion body. Fasten the mounting plate near the side edge.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment in which the present invention is applied to a backrest of a chair. A cushion body (1) for a backrest shown in FIG. The structure which attaches to a reclining board (2) is shown.

The cushion body (1) is made of a polyurethane foam (3) (see FIG. 6) molded according to the outer shape of the backrest substrate (2), and a skin material (4) such as cloth or vinyl leather.
According to (5), it is covered from the front and back.

As shown in FIG. 1, the upper side edge (1a) of the cushion body (1) is folded back to the back side, and the inside of the folded skin materials (4) and (5) is combined with the composite shown in FIG. An elastic holding plate (6), which is a resin molded product, is fixed to the inside of the cushion body (1) with the holding opening (6a) facing downward.

At the lower edge (1b) of the cushion body (1),
A mounting plate (7), which is a metal or hard synthetic resin band-like plate that is open upward as shown in FIG. 3, is fixed. Mounting plate (7)
Is provided with a plurality (four in the illustration) of engagement holes (8).

An elastic holding plate (6) is fixed inside the folded portion on the upper side of the cushion body (1), the left and right ends of the folded portion are stitched, and a mounting plate is attached to a lower end edge of the cushion body (1). The state where (7) is fixed is shown in FIG.

As shown in FIG. 5, the backrest plate (2) is made of a hard synthetic resin plate having a shape conforming to the outer shape of the backrest substrate (2). An engaging projection 9 protruding at a position corresponding to the engaging hole 8 protrudes forward.

As shown in FIG. 6, the engaging projection (9) has a locking head (8a) at the tip thereof for locking to the inner surface of the engaging hole (8).

In order to attach the cushion body (1) to the backrest substrate (2), first, the cushion body (1) is inserted into the holding opening (6a) of the elastic holding plate (6) fixed in the folded portion at the upper part of the cushion body (1). Then, the upper end of the backrest substrate (2) is hooked and pressed. The state of the press fit is shown in the upper part of FIG.

Next, the lower end portion of the cushion body (1) is grasped, and a plurality of engaging holes (8) formed in the mounting plate (5).
To the corresponding engaging projections (9) projecting from the backrest substrate (2).
Insert Then, as shown in the lower part of FIG. 6, the locking head (9a), which is the half of the tip of the engagement projection (9), is inserted into the engagement hole.
(8). The cushion body (1) thus attached to the backrest substrate (2) is shown in FIG.

It is needless to say that the present invention can be applied to a seat of a chair.

[0019]

According to the first aspect of the present invention, the weight of the chair can be reduced by simply fixing the elastic holding plate and the mounting plate to the cushion body side, and one side of the chair substrate is provided. In the state where the edge is held by the holding plate, by fitting and locking the position of each engagement projection with each engagement hole on the other side edge,
The mounting work of the cushion body can be performed easily and with high efficiency. Further, according to the posture of the seated person, even if the cushion body and the chair substrate are flexibly deformed, the chair substrate slides in the holding opening of the elastic holding plate. Deformation and damage due to excessive load applied to the projections and the like can be prevented.

According to the second aspect of the present invention, the elastic holding plate is not exposed and the appearance is good.

According to the third aspect of the present invention, the lower portion of the cushion body can be easily and securely locked to the chair substrate.

According to the fourth aspect of the present invention, the backrest is
It can be reliably formed with a simple mounting structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cushion body for a backrest in a state where an upper portion thereof is folded back, as viewed from a back surface side.

FIG. 2 is a perspective view of an elastic holding plate attached inside a folded portion of the cushion body.

FIG. 3 is a perspective view of a mounting plate fixed to a lower edge of the cushion body.

FIG. 4 is a perspective view of the cushion body on which the elastic holding plate and the mounting plate are fixed, as viewed from the back surface side.

FIG. 5 is a perspective view of the backrest substrate as viewed from the back side.

FIG. 6 is a partially enlarged longitudinal sectional view of an attachment portion between the backrest substrate and the cushion body.

FIG. 7 is a perspective view of a cushion attached to a backrest substrate.

[Explanation of symbols]

 (1) Cushion body (1a) Upper edge (1b) Lower edge (2) Backrest substrate (3) Polyurethane foam (4) (5) Skin material (6) Elastic holding plate (6a) Holding opening (7 ) Mounting plate (8) Engagement hole (9) Engagement protrusion

Claims (4)

[Claims] 1. An elastic holding plate having a holding opening facing inward of a cushion body is fixed to one side edge of a back surface of a cushion body formed in accordance with an outer shape of a chair substrate in a seat portion or a backrest. Then, one side edge of the chair substrate is pressed and clamped to the elastic clamping plate, and is punched in a strip-shaped mounting plate fixed along the other side edge of the back surface of the cushion body. A seat cushion mounting structure for a chair, wherein engagement projections formed on the chair substrate and protruding at positions corresponding to the engagement holes are fitted and locked in the plurality of engagement holes. . 2. A cushion body for a chair according to claim 1, wherein the skin material covering the cushion body is folded back to the back side at one side edge of the cushion body, and an elastic holding plate is fixed inside the folded skin material. Mounting structure. 3. The head according to claim 1, wherein a locking head for locking the engaging projection of the chair substrate to an inner surface of an engaging hole formed in the mounting plate of the cushion body is provided at a front end. Chair cushion mounting structure. 4. The chair substrate as a backrest plate, an elastic holding plate is fastened near an upper side edge of the cushion body, and an attachment plate is fastened near a lower side edge of the cushion body. A cushion body mounting structure for a chair according to any one of the above.