JP2002102010A - Fitting structure of cushion body of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and firmly mount a cushion body to the seatback or the seat of a chair from the rear without using a fixing screw, a fixing metal fitting, etc. and to prevent the design of the seatback or the seat from being restricted. SOLUTION: A folded part 7a facing the direction of the side of a shell 5 is formed at the edge part of the cushion body 7, an elastically bendable engaging piece 12 having an engaging pawl 11 facing the direction of the part 7a at its tip is projectingly provided on the rear surface of a core material 8, the part 7a is abutted on the edge of a corresponding shell 5, the piece 12 is fitted into an engaging hole 6 formed at the shell 5 and the pawl 11 is engaged with an edge 6a on the side of the rear surface of the hole 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As this kind of mounting structure, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 4-86446, a cushion body is screwed from the back surface of a backrest plate or a seat plate, or a stopper. It is common to lock with.

[0003] Further, there is a case where a chair in which a cushion body is not provided on a backrest or a seat is used as a basic type and a cushion body is attached to a backrest or a seat of the chair as a related product. In this case, the cushion body is often formed in a bag shape and put on a backrest plate or a seat plate.

[0004]

When the cushion body is screwed to a backrest or the like, the thickness of the hard core material in the cushion body is increased to secure the mounting strength or to secure the set screw. Since it is necessary to increase the number and secure the mounting strength, the material cost is high, the assembling work is complicated, and the cost is increased.

[0005] In the case where the cushion body is put on a backrest plate or the like in the form of a bag, the backrest plate or the seat plate must be formed in a shape suitable for the backrest plate or the seat plate. However, there is a problem that the cushion body cannot be provided only at the central portion.

The present invention has been made in view of the above-mentioned problems of the prior art, and has a cushion member provided on a backrest or a seat of a chair completed without a cushion member on the backrest or the seat. Provided is a structure for mounting a cushion body in a chair that can be easily and securely mounted later without using a set screw or a fastener, and that the design of a backrest or a seat is not restricted. It is intended to be.

[0007]

Means for Solving the Problems (1) A cushion body in which a core material made of a hard material having elasticity is covered with a cushion material is attached to a shell fixed to a frame of the chair. An elastic structure having a bent portion facing the shell side at an edge portion of the cushion body, and an engaging claw facing a direction of the bent portion at a front end portion on a back surface of the core material. A bendable locking piece protrudes, the bent portion abuts a corresponding edge of the shell, and the locking piece fits into a locking hole provided in the shell, and the engagement is performed. The pawl is engaged with the edge on the back surface side of the locking hole.

(2) In the above item (1), a bent portion is formed on the back surface side of the edge of the shell, and the bent portion of the cushion body is brought into contact with the surface of the bent portion.

(3) In the above item (1) or (2), the surface of the cushion material in the cushion body is covered with a skin material, and the edge of the skin material covering the bent portion is separated from the edge of the bent portion. It is folded back on the back of the core and clamped between the core and the edge of the shell.

(4) In any one of the above items (1) to (3), the edge of the locking hole, which is close to the edge of the shell with which the bent portion of the cushion body abuts, is engaged with the edge. It is longer than the width of the locking claw, and is a straight line parallel to the edge of the shell.

(5) In any one of the above items (1) to (3), the edge of the engaging hole, which is close to the edge of the shell, at which the bent portion of the cushion body abuts, is moved toward the edge of the shell. V-shaped or trapezoidal shape that converges.

[0012]

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.

In this chair, the front ends and the rear ends of the upper rods (2a) and (2a) of the two side legs (2) and (2) formed by bending a stainless steel pipe into a substantially rectangular shape in side view are formed. Is provided with a seat frame (1) connected by two connecting rods (not shown) facing left and right.

A substantially rectangular seat plate (not shown) is fixed on the seat frame (1) in a plan view, and a seat cushion body is attached to the seat plate.
(3) is attached by an appropriate attachment structure. The connecting rod connecting the rear ends of the upper rods (2a) and (2a) is a pair of right and left backrest frames (4) formed of an aluminum light alloy deformed tube and expanding upward from each other. (4)
Are fixedly spaced from each other.

On the front surface of the backrest frames 4, 4 are supported a shell 5, which is an integrally molded synthetic resin material and forms a backrest plate.

The shell (5) is in contact with the inner surface and the front surface of the backrest frame (4) on both sides of the substantially home-base-shaped substrate (5a) in front view, the lower side of which is shorter than the upper side. A side edge (5b) is formed so as to cover the upper end of (4), and a bent portion (5c) bent substantially at a right angle to the back surface, that is, the rear surface side, is formed on the upper edge of the substrate (5a). Consists of formed ones.

The substrate (5a) has a curved surface whose center is recessed rearward in a plan view, and a curved surface whose bottom is curved rearward in a side view. The board (5a) is provided with a large number of inverted regular triangular locking holes (6) so as to form an arbitrary pattern which is symmetrical with respect to the center line of the board (5a).

The cushion body (7) has a curved surface shape similar to that of the shell (5), and has a core material (8) made of an elastic hard synthetic resin having a substantially home base shape in a front view, and a core material.
A cushion material made of an elastic body such as foamed polyurethane adhered to the front surface of the core material (8) so as to cover the front surface of (8).
(9) and a skin material (10) made of cloth, vinyl leather or the like covering the surface of the cushion material (9).

A bent portion (8a) bent rearward so as to be in close contact with a bent portion (5c) provided on the upper edge of the shell (5) is provided on the upper edge of the core material (8). Along with this, a bent portion (7a) facing rearward is also formed at the upper edge of the cushion body (7). On the left and right sides on the back surface of the core material (8),
Three elastically bendable locking pieces (12) each having an engaging claw (11) facing the direction of the bent portion (8a) at the tip end, that is, having an upwardly engaging engaging claw (11).
However, it protrudes rearward. (13) is the core material (8)
Are die-cut holes formed immediately above each locking piece (12).

The skin material (10) has a cushion material for its area.
(10a) A cylindrical bag portion (10a) which is slightly larger than the area of the front surface of (9), and in which one string (14) is inserted all around.
Are formed. The skin material (10) is covered with the core material (8) and the cushion material (9) so as to cover the rear edge of the core material (8) with the string (14) loosened, and then the bag portion (10a). It is attached to the core member (8) by tightening and tying the string (14) exposed to the outside from two holes formed at the lower end of the core (8).

Before the cushion body (7) is attached to the shell (5), the bent portion at the upper end of the core (8)
(8a) and the cushioning material (9) on the surface
(8) The upper edge of the skin material (10) folded back on the rear surface is shown in FIG.
As shown in (a), the string (14) is tightened to form an inclined surface facing forward and downward.

Next, the procedure for attaching the cushion body (7) to the shell (5) will be described. The bent part (7a) formed on the upper edge of the cushion body (7) is connected to the bent part (5c) of the shell (5).
Each of the locking pieces (12) protruding from the back surface of the core material (8) is pressed into the locking holes (6) of the corresponding shell (5) while being elastically deformed slightly upward by pressing from above in front. And each engaging claw (11) is elastically engaged with the rear upper edge (6a) of the locking hole (6).

At this time, the upward engaging claw (11) is
(6) The cushion body is engaged with the rear upper edge (6a).
(7) can be prevented from shifting upward and forward, and the bent portion (8a) of the core (8) is fitted from above the bent portion (5c) of the shell (5). Therefore, displacement of the cushion body (8) downward can be prevented, and even when a seated person leans on the cushion body (7), the cushion body (7) does not displace.
The cushion body (7) can be securely fixed to the shell (5).

Also, as shown in FIG.
(11) is engaged with the rear upper edge (6a) of a straight line extending in the left-right direction parallel to the bent portion (7a) in the locking hole (6) with a margin in the left-right direction. It is possible to absorb a slight misalignment between the (11) and the locking hole (6) in the left-right direction.

When the cushion body (7) is attached to the shell (5), the upper edge of the skin material (10) tightened by the string (14) is formed by the bent portion (8a) of the core material (8). Since it is sandwiched in an inverted L-shaped gap between the back surface and the surface of the bent portion (5c) of the shell (5), peeling between the core (8) and the shell (5) is prevented. In addition to being prevented, the tensile force of the skin material (10) is further increased.

Further, the bent portion (8a) of the core material (8) and the shell
The tension of the skin material (10) in the portion sandwiched between the bent portion (5c) of (5) causes the engaging claw (11) to be always in the rear upper edge (6a) of the locking hole (6). Since it acts so as to be engaged, the cushion body (7) can be stably fixed to the shell (5).

In this embodiment, the bent portion (5c) is provided at the upper edge of the shell (5) and the bent portion (8a) is provided at the upper edge of the cushion body (8). ) Are provided on both sides of the shell (5) so as to be brought into contact with both side edges of the shell (5). Are provided to increase the contact area with the bent portions on both sides of the shell (5), or the locking pieces (8) approaching the bent portions on both sides of the cushion body (8). When the engaging claw (11) of 12) is directed to the direction of the bent portion,
The cushion body (8) can be more firmly attached to the shell (5).

As shown in FIG. 6, the shape of the locking hole (6 ') drilled in the shell (5) is an upright triangle or trapezoid, and an upward engaging claw ( When the engagement with the shell 11 is performed, the positioning of the cushion body 7 with respect to the shell 5 in the left-right direction can be achieved.

Further, the present invention can also be applied to a mounting structure of a seat cushion body (3) to a seat plate in a chair seat, that is, a seat shell.

[0030]

According to the first aspect of the present invention, the bent portion formed at the edge of the cushion body is brought into contact with the corresponding edge of the shell, so that the locking piece of the cushion body is brought into contact with the backrest plate. The cushion can be easily attached to shells such as the backrest plate and seat plate without using set screws or fasteners by simply elastically engaging the lock holes of
The cushion body can be easily attached later to the backrest or seat of the chair which is completed in a state where the cushion body is not provided on the backrest or seat if necessary.

Further, the engaging claw of the cushion body is oriented in the direction of the bent portion of the cushion body, and the edge of the shell is sandwiched from the inside and the outside by the bent portion of the cushion body. The cushion body can be securely attached to the shell without falling off.

Further, the cushion body does not need to cover the entire shell, but is provided with a bent portion at an arbitrary edge and a projection is provided on the back surface so as to cover only the central portion of the shell, for example. Can be attached to 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 area of the portion where the bent portion of the cushion abuts on the shell can be increased, so that the effect of preventing the cushion from being displaced downward is enhanced.

Further, the bent portion of the shell can be used as a finger hook when the chair is carried, which is convenient for carrying the chair.

According to the third aspect of the present invention, the skin material is
It is sandwiched between the bent part of the cushion body and the edge of the shell,
It is possible to provide a cushion body in which the edges of the skin material are not easily peeled off and which has a good appearance. In particular, when combined with the structure of the second aspect, the area of the sandwiching portion of the skin material becomes large, and the peeling becomes more difficult.

According to the fourth aspect of the present invention, when a large number of locking holes with which the engaging claws are engaged are provided along the edge of the shell with which the bent portion of the cushion body abuts, the dimensional errors thereof. It is possible to absorb the deviation of the positions of the corresponding engaging claws and the locking holes due to, for example, such that any of the engaging claws can reliably engage with the corresponding locking holes.

According to the fifth aspect of the present invention, the engagement pawl has a V
The cushion body is positioned in the left-right direction with respect to the shell by engaging with the edge of the locking hole formed in the shape of a letter or trapezoid.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of a cushion body and a shell.

FIG. 3 is a perspective view of the cushion body as viewed from the rear.

FIG. 4 is a partially enlarged cross-sectional view showing the manner of attaching the cushion body.

FIG. 5 is a partially enlarged rear view of the engaging portion between the engaging claw and the locking hole as viewed from the rear.

FIG. 6 is a partially enlarged rear view similar to FIG. 5 in a modified example.

[Explanation of symbols]

 (1) Seat frame (2) Side legs (2a) Upper rod (3) Seat cushion body (4) Backrest frame (5) Shell (5a) Substrate (5b) Side edge (5c) Bend (6) (6 ') Locking hole (6a) Rear upper edge (7) Cushion body (7a) Bend (8) Core (8a) Bend (9) Cushion (10) Skin (11) Engage Claw (12) Locking piece (13) Die-release hole (14) String

Claims (5)

[Claims] 1. A mounting structure of a cushion body in a chair, wherein a cushion body in which a surface of a core material made of an elastic hard material is covered with a cushion material is mounted on a shell fixed to a frame of the chair. A resiliently bendable locking piece having a bent portion facing the shell side formed at an edge of the cushion body, and having an engaging claw at a front end portion facing the bent portion on a back surface of the core material. Projecting, the bent portion abuts the edge of the corresponding shell,
And the locking piece is fitted into a locking hole provided in the shell,
A cushion mounting structure in a chair, wherein the engaging claw is engaged with an edge on a rear surface side of a locking hole. 2. A bent portion is formed on the back side of the edge of the shell,
2. The mounting structure of a cushion according to claim 1, wherein the bent portion of the cushion body is in contact with the surface of the bent portion. 3. The core material and the shell, wherein the surface of the cushion material in the cushion body is covered with a skin material, and the edge of the skin material covering the bent portion is folded back from the edge of the bent portion to the back surface of the core material. 3. The mounting structure of a cushion body in a chair according to claim 1, wherein said cushion body is sandwiched between said edge and said edge. 4. An edge portion of the engaging hole, which is close to an edge of the shell with which the bent portion of the cushion body abuts, is longer than a width of the engaging claw engaging with the edge portion and is parallel to the edge of the shell. The mounting structure of the cushion body in the chair according to any one of claims 1 to 3, which has a straight shape. 5. The V-shaped or trapezoidal shape in which the edge of the engaging hole near the edge of the shell, at which the bent portion of the cushion body abuts, converges toward the edge of the shell.
4. The mounting structure of a cushion body in the chair according to any one of items 3 to 3.