JP2002125790A - Structure of installing chair cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of installing a chair cushion which enables a user to attach a cushion to a seatback or a seat of a chair not equipped with a cushion easily and securely without using a setscrew and allows the user to have a variety of designs for the seatback and the seat. SOLUTION: Plural protrusions 18 for setting positions which join with penetrating holes 8 preset on a shell 7 are formed on a back side of a core material 10. Also, plural joining holes 17 are formed on the back side of the core material 10 at places where they match with the other penetrating holes 8 when the protrusion 18 for setting a position is joined to the corresponding, penetrating hole 8. The protrusion 18 for setting the position is joined to the corresponding, penetrating hole 8, and a rivet 21 to stop dropping out is joined to the joining hole 17 and the other matching, penetrating hole 8 from the back side of the shell 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a cushion body to a backrest or a seat of a chair.

[0002]

2. Description of the Related Art In general, a cushion body of a chair is attached by screws from the back of a backrest or a seat.

There is also a chair in which the cushion body is formed in a bag shape so that it can be put on a backrest or a seat.

[0004]

When the above-mentioned cushion body is screwed to a backrest or the like, a large number of screws must be tightened, and the screwing work is complicated.

Further, in the case where the cushion body is put on a backrest or the like in the form of a bag, the design of the backrest, the seat and the cushion body, particularly the curves of the surfaces thereof are restricted, and the cushion body is placed on the backrest or the seat. Cannot be provided only in a part of.

The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to simply and reliably attach a cushion body to a backrest or a seat of a chair having no cushion body without using a set screw. An object of the present invention is to provide a structure for mounting a cushion body in a chair, which can be mounted and does not restrict the design of a backrest or a seat.

[0007]

According to the present invention, the above-mentioned problems are solved as follows. (1) A cushion in which a surface of a core material made of an elastic hard material is covered with a cushion material in a shell fixed to a chair frame and having a number of through holes formed in a required pattern on a mounting surface of the cushion body. A mounting structure of a cushion body in a chair to which a body is mounted, on the back surface of the core material,
While projecting a plurality of positioning projections that fit into predetermined through holes in the shell, when the positioning projections are fitted into the corresponding through holes, a plurality of fitting holes are formed at positions matching the other through holes. The positioning projection is fitted into the corresponding through hole, and a stopper having a retaining means is fitted into the fitting hole and another through hole aligned with the fitting hole from the back surface of the shell.

(2) In the above item (1), a positioning projection and a fitting hole are provided on the periphery of the back surface of the core material so as to be close to each other.

(3) In the above item (1) or (2), a fitting hole is formed in a tip end surface of a plurality of protrusions projecting from a back surface of the core material.

(4) In any one of the above items (1) to (3), the stopper is a push-in type rivet.

(5) In any one of the above items (1) to (4), a projecting ridge projecting rearward along the peripheral edge of the back surface of the core material is provided, and the projecting ridge is attached to the cushion. The peripheral portion is covered with the peripheral portion of the skin material covering the surface and the peripheral portion of the cushion material in the body, and the peripheral portion is sandwiched between the ridge and the surface of the shell.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A chair provided with an embodiment in which the present invention is applied to a backrest will be described below with reference to FIGS.

As shown in FIG. 1, this chair is composed of two upper legs (2) and (2) which are formed by bending and welding steel pipes. 2a) A seat frame (1) is provided in which the front end portions and the rear end portions of (2a) are connected to each other by two connecting rods (3) and (4) that face in the left-right direction.

A seat plate (not shown) having a substantially rectangular shape in plan view is fixed on the seat frame (1), and a seat cushion body is provided on the seat plate.
(5) is attached by an appropriate attachment structure.

The lower ends of a pair of left and right cylindrical backrest frames (6) (6) parallel to each other are fixed to the rear ends of the side legs (2) (2).

The backrest frames 6 support a shell 7 made of a synthetic resin material as a backrest plate.

As shown in FIGS. 1 and 4, the shell (7)
Are placed on both sides of the substantially vertical board (7a).
(6) Side frame part (7b) (7b) into which the upper end of (6) is fitted from below
And a bent portion (7c) is provided on the upper side of the substrate (7a) on the back side, that is, on the rear side, at a substantially right angle.

The substrate (7a) has a curved surface whose center is recessed rearward in plan view, and a curved surface whose lower portion curves rearward as shown in FIG.

In the substrate (7a), a large number of circular through holes (8) are formed in a punching metal shape for the purpose of improving elasticity of the shell (7) and improving air permeability. (See FIG. 4). Accordingly, the shell (7) is provided with the cushion body (9).
It has sufficient elasticity so that it can be used comfortably without it.

The cushion body (9) is made of a hard synthetic resin core material (10) and the core material (10) so as to cover the front surface of the core material (10).
A cushioning material (11) made of an elastic material such as foamed polyurethane adhered to the front surface of the device, and a cloth (12) made of cloth or vinyl leather covering the surface of the cushioning material (11).

A ridge (13) projecting rearward is provided continuously on the entire peripheral edge of the back surface of the core material (10). FIG.
As shown in the figure, the core material (10) is provided with two upper and lower slits (14) extending from the side end faces toward the center on both left and right sides in order to improve elasticity. A plurality of (six in the illustrated example) long holes (15) directed in the direction are formed at appropriate intervals in the left-right direction.

A plurality of boss-shaped protrusions (16) are provided in a suitable pattern at a portion near the periphery on the back surface of the core material (10). A circular fitting hole (17) is formed in the center of the distal end surface (16a) of the circular projection (16).

On the back surface of the core member (10), four synthetic pin-shaped positioning projections (18) are provided, three upper projections (16) and one projection provided at the lower center. (16), and the rear end protrudes rearward from the rear end face (16a) of the protruding portion (16).

The positioning projections (18) and the fitting holes (17) are provided so that each positioning projection (18) is formed by a corresponding through hole in the shell (7).
When fitted in (8), each fitting hole (17) is
The relationship is consistent with (8).

The skin material (12) is slightly larger than the area of the front surface of the cushion material (11), and extends over the entire circumference.
A tubular bag portion (20) into which one string (19) is inserted is formed. The skin material (12) is the core material with the string (19) loosened.
After covering the core material (10) and the cushion material (9) so as to wrap from the outer peripheral edge of (10) to the inside of the ridge (13), the bag portion (2
The string (19) drawn out from the two holes provided at the lower end of (0) is attached to the core (10) by tightening and tying (see FIG. 3).

The stopper (21) shown in FIG. 5 has a retaining means. In this example, the stopper (21) is formed by a push-in type rivet made of synthetic resin. That is, as shown in FIG. 6, the stopper (21) has a headed pin (22) having an enlarged diameter head (22 a) at the rear end, and the headed pin (22) is pushed from behind. The hollow rivet (23) has a radially divided distal end portion whose diameter is enlarged to prevent the fitting from coming out of the fitted hole.

Next, the procedure for attaching the cushion body 9 to the shell 7 will be described. First, three positioning projections (18) provided on the upper surface of the back surface of the core material (10) are
After fitting into the through hole (8) of (7), the lower part of the cushion body (9) is moved backward, and the positioning projection (18) provided at the center of the lower surface of the back surface of the core material (10) is moved to the shell. It is fitted into the through hole (8) located at the center of the lower part of (7). At this time, the fitting hole (17) provided at the center of each protrusion (16) is a through hole of the corresponding shell (7).
Consistent with (8).

Next, from the rear of the shell (7), a stopper (21) with a retaining means is fitted into each fitting hole (17) and the through hole (8) matched with the fitting hole (17). By pushing in the pin (22) and expanding the diameter of the tip of the hollow rivet (23), the cushion body (9) is securely fixed to the front surface of the shell (7).

At this time, the periphery of the skin material (12) is
It is clamped between the ridge (13) of (0) and the front surface of the shell (7), and the edge of the skin material (12) does not peel off unnecessarily.

According to the embodiment described above, the shell
The cushion body 9 can be easily attached to the front surface of the shell 7 without using set screws or the like simply by fitting the stopper 21 from the rear of the shell 7.

In the above embodiment, the positioning projections (18) are provided only in the vicinity of the fitting holes (17) formed in the center of the back surface of the core material (10). A positioning projection (18) may be protruded in the vicinity of. In this way, the core material (10)
It is easy to align the fitting hole (17) with the through hole (8) of the shell (7), and the cushion body (9) can be more firmly fixed by the shell (7).

In the above-described embodiment, the present invention is applied to the mounting structure of the cushion body (9) to the shell (7) which is the backrest of the chair. It can also be applied to the mounting structure of the seat cushion body (5).

[0033]

According to the first aspect of the present invention, the cushion is simply inserted into the shell used for the backrest or the seat without using a set screw or the like by merely inserting the stopper from the rear of the shell. And the cushion body can be easily attached later to the backrest or seat of a completed chair without the cushion body provided on the backrest or seat if necessary.

Further, by providing the positioning projection,
The fitting hole can be easily aligned with the through hole, making it easier to attach the stopper.The load on the cushion body is also distributed to the positioning protrusions, reducing the concentration of stress on the stopper. The durability of the fastener is improved.

The cushion body does not need to cover the entire shell, but is provided with positioning protrusions on any edge and a fitting hole formed on the back surface, for example, so as to cover only the central portion of the shell. Can be. Also, the design of the shell can be freely designed. For example, the shell may have a curved shape such that the center of the front surface is extremely concave.

According to the second aspect of the present invention, the fitting hole is
The holes are more accurately positioned with the corresponding through holes, and the insertion of the fasteners into them is further facilitated, and the stress concentration on the fasteners can be reduced more effectively.

According to the third aspect of the present invention, the strength of the periphery of the fitting hole is improved, the cushion body can be firmly connected to the shell, and the tip end of the stopper projects between the cushion bodies, so that the cushion body can be firmly connected. It is possible to prevent the material from being damaged or giving the seated person a feeling of protrusion. Also,
Since a slight gap is formed between the surface of the shell and the rear surface of the core material, the core material is easily bent, so that a comfortable sitting feeling can be given to the occupant, and the air permeability is good.

According to the fourth aspect of the present invention, the attachment and detachment of the cushion body is further facilitated.

According to the fifth aspect of the present invention, the skin material is
It is pinched between the ridge of the cushion body and the front of the shell,
The edge of the skin material is hardly peeled off, and the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a chair provided with an embodiment of the present invention.

FIG. 2 is also an enlarged front view of a backrest portion.

FIG. 3 is also a rear view of only the cushion body.

FIG. 4 is a rear view of only the shell when the cushion body is removed.

FIG. 5 is an enlarged vertical sectional side view in which an intermediate portion along the line VV in FIG. 2 is omitted.

FIG. 6 is an explanatory diagram for explaining the operation of the stopper.

[Explanation of symbols]

 (1) Seat frame (2) Side legs (2a) Upper rod (3) (4) Connecting rod (5) Seat cushion body (6) Backrest frame (7) Shell (7a) Board (7b) Side frame ( 7c) Bend (8) Through hole (9) Cushion body (10) Core material (11) Cushion material (12) Skin material (13) Ridge (14) Slit (15) Slot (16) Protrusion ( 16a) Tip surface (17) Fitting hole (18) Positioning protrusion (19) String (20) Bag (21) Stopper (22) Headed pin (22a) Diameter enlarged head (23) Hollow rivet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A47C 31/11 A47C 31 / 11F

Claims (5)

[Claims] 1. A shell, which is fixed to a chair frame and has a number of through holes formed in a required pattern on a mounting surface of a cushion body, covers a surface of a core material made of an elastic hard material with a cushion material. A mounting structure of a cushion body in a chair to which a cushion body is mounted, wherein a plurality of positioning protrusions that fit into predetermined through holes in a shell are provided on a back surface of the core material, and the positioning protrusions correspond to the plurality of positioning protrusions. When fitting into a through hole, a plurality of fitting holes are formed at positions matching with other through holes, the positioning projections are fitted into corresponding through holes, and aligned with the fitting holes. A mounting structure for a cushion body in a chair, wherein a stopper having a retaining means is fitted to another through hole from the back surface of the shell. 2. A positioning projection and a fitting hole are provided on a peripheral edge portion of a back surface of a core member so as to be close to each other.
The mounting structure of the cushion body in the chair according to claim 1. 3. A cushion mounting structure for a chair according to claim 1, wherein said fitting hole is formed in a front end surface of a plurality of protrusions protruding from a back surface of said core material. 4. The mounting structure for a cushion body in a chair according to claim 1, wherein the stopper is a push-in type rivet. 5. A projecting ridge projecting rearward along the periphery of the back surface of the core material, and the projecting ridge is provided at the periphery of the skin material covering the surface and the periphery of the cushion material in the cushion body. The cushion mounting structure for a chair according to any one of claims 1 to 4, wherein the peripheral portion is covered between the projection and the surface of the shell.