JP2732987B2 - Chair mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with a backrest, and more particularly to a backrest mounting structure for improving the mounting strength of a backrest and for cleverly concealing the mounting portion. is there.

[0002]

2. Description of the Related Art As a simple chair with a backrest, for example, the left and right rear ends of a pair of legs are projected above a seat,
It is known that a backrest is attached to the protruding end. In the conventional backrest mounting structure of such a chair, the leg protruding ends are provided with screw insertion holes extending along the surface direction of the backrest, and screw holes continuous with the screw insertion holes are provided at both left and right ends of the backrest. With the backrest interposed between the leg protruding ends, screws are inserted into the legs from the outside and fastened to the screw holes of the backrest, so that the backrest is supported by the legs.

[0003]

However, with such a mounting structure, the load applied to the backrest acts as a shear force on the screw, and the screw is likely to be loosened or broken. Therefore, there is a problem that it is difficult to maintain a firm attachment state of the backrest for a long time. Also,
Since the head of the screw is exposed to the outside, there is also a problem that the appearance is easily impaired.

An object of the present invention is to provide a backrest mounting structure capable of effectively solving these problems.

[0005]

In order to achieve the above object, the present invention employs the following configuration.

Namely, the backrest mounting structure of chair <br/> terminal of the invention according to claim 1 of the present patent application is, by projecting the right and left rear legs up above the seat, via a vertical tongue on the projecting end The backrest mounting structure of the chair is designed to mount the backrest,
The vertical tongue is rigidly attached to a leg, and has a mounting surface along a backrest, a screw insertion hole penetrating in a thickness direction, and the backrest includes a back plate. ,
On the back surface of the back plate, a screw hole that is continuous with the screw insertion hole at the mounting position is provided, and by inserting a screw into the screw insertion hole of the vertical tongue piece and fastening it to the screw hole of the back plate. , Ri Na by supporting the backrest leg, the vertical tongue
While providing a fastener insertion hole penetrating in the thickness direction,
On the back plate, a fastener mounting part that is continuous with the fastener insertion hole
Fasteners provided on the inner surface of the surface material to be covered
To the fastener mounting part through the fastener insertion hole.
It is characterized by wearing .

[0007] The chair of the invention according to the second aspect of the present invention.
The backrest mounting structure projects the left and right rear ends of the legs
And attach the backrest to the protruding end via a vertical tongue.
The mounting structure of the backrest of the chair
The vertical tongue is rigidly attached to the leg and follows the back
Mounting surface and a screw insertion hole penetrating in the thickness direction
Yes, the backrest is provided with a back plate,
At the back of the back plate, in the screw insertion hole at the mounting position
A continuous screw hole is provided, and the screw insertion of the vertical tongue piece
Insert a screw into the through hole and fasten it to the screw hole on the back plate
Thereby, the backrest is supported by the legs, and the vertical tongue is provided with a fastener insertion hole penetrating in the thickness direction, while the back plate is provided with a fastener mounting portion continuous with the fastener insertion hole, and further this back plate is provided. It has an opening and is covered with a bag-shaped surface material in which a fastener is provided on the back surface on the upper edge side of the opening, and the fastener is inserted into the fastener insertion hole and fastened to the fastener mounting portion. it allows to close the upper and lower edges of the opening of the surface material, characterized by being adapted to accommodate a vertical tongue on the inside of the backrest. Such a structure
By doing so, it becomes possible to cleverly hide the attachment portion between the backrest and the leg.

With such a mounting structure, the load applied to the backrest is transmitted directly to the leg via the vertical tongue piece rigidly attached to the leg, so that no shear force is applied to the screw.
In particular, the vertical tongue is properly fixed to the leg by welding.
Therefore, even if the screws are slightly loosened,
The structure which does not apply a shearing force to the screw is maintained. Therefore, according to the present invention, the strong attachment state of the backrest can be maintained for a long time.

Further, in a state where the fastener of the surface material is mounted on the fastener mounting portion of the back plate, the upper edge and the lower edge of the opening are closed, and the vertical tongue is accommodated inside the backrest, the upper edge of the surface material is And the lower edge are continuous, and the mounting element of the backrest including the screw is not exposed to the outside at all.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

In the chair with a backrest shown in FIG.
It is configured by connecting two long pipe members 2 and two short pipe members 3 via a connection pipe 4. Then, a seat 5 is mounted on the connecting pipe 4 of the leg 1.

That is, the upper end of the pipe member 2 on the left and right rear end sides of the leg 1 projects above the seat 5, and in the present embodiment, the projected end 2a has a backrest 7 via a vertical tongue piece 6. Is installed.

As shown in FIGS. 1, 2, 3 and 5, the vertical tongue piece 6 is rigidly connected to the mutually facing surfaces of the projecting ends 2a of the two pipe members 2 via welding joints 6a. It has a mounting surface 61 extending along the backrest 7 and a pair of upper and lower screw insertion holes 62 and fastener insertion holes 63 penetrating in the thickness direction.

The backrest 7 is, as shown in FIGS.
A plywood back plate 71 is provided.
A screw hole 71a continuous with the screw insertion hole 62 and a fastener mounting portion 71b continuous with the fastener insertion hole 63 at the mounting position are formed on the rear surface of the screw hole 71a. The back plate 71 is covered with a surface material 72. Surface material 72
Is formed by superimposing two cloths 72b each having a shape corresponding to the back plate 71, sewing the cloth 72b in a bag shape while partially sewn the periphery, and turning over the cloth 72b to cover the outer periphery of the urethane 72a forming the shape of the backrest 7. Then, the cloth 72b is adhered to the urethane 72a by foaming the urethane 72a. Then, the surface material 72 is put on the back plate 71 from above, and the lower edge 72d and the lower edge 72e of the opening 72c opening near the lower end thereof.
Is wrapped around the back of the back plate 71, is fixed to the back plate 71 by the tacker 73, and the upper edge 72f of the opening 72c.
The upper edge 72g is wrapped around the inner surface of an auxiliary plate 74 made of plywood, and is fixed to the auxiliary plate 74 by a tacker 73. That is, the auxiliary plate 74 is held by the surface material 72 so as not to fall off. In this case, the auxiliary plate 74 may be pasted on the surface material 72 with glue or the like. A fastener 75 which is attached to and detached from the fastener mounting portion 71b protrudes from a portion of the inner surface of the auxiliary plate 74 corresponding to the fastener mounting portion 71b.

Next, the procedure for attaching the backrest 7 will be described.
First, the back of the back plate 71 of the backrest 7 is attached to the mounting surface 61 of the vertical tongue 6, and in this state, the countersunk screw 8 is inserted into the screw insertion hole 62 of the vertical tongue 6, and The backrest 7 is supported by the leg 1 via the vertical tongue 6 and the pipe member 2 by tightening the screw holes 71a of the 71. Next, a fastener 75 is inserted into the fastener insertion hole 63 and press-fitted into the fastener mounting portion 71b, thereby forming an upper edge 72f and a lower edge 72d and an upper edge 72g and a lower edge 72e of the opening 72c of the surface material 72. Is closed, and the vertical tongue piece 6 is accommodated in the backrest 7 in a sandwich shape. FIG. 6 shows the appearance of the chair after attachment.

With the above-mentioned backrest mounting structure,
The load applied to the backrest 7 is transmitted directly to the leg 1 via the vertical tongue 6 which is rigidly attached to the leg 1 by welding, so that no shear force acts on the screw 8. Therefore, the weld joint 6a
As long as is properly provided, the strong attachment state of the backrest 7 can be maintained for a long time.

Moreover, according to the backrest mounting structure, the fastener 75 of the surface material 72 is mounted on the fastener mounting portion 71b of the back plate 71, the opening 72c is closed, and the vertical tongue 6 is accommodated in the backrest 7. In the state, the surface material 72
The upper edge 72f and the lower edge 72d and the upper edge 72g and the lower edge 73e are continuous, and the mounting elements such as the screws 8 and the fasteners 75 are not exposed to the outside. Is also possible.

The legs are not necessarily limited to those having a pipe member as a constituent element. In addition, the shape of the surface material, screws, fasteners, etc., including the vertical tongue, can be variously modified without departing from the present invention.

[0019]

According to the seat back mounting structure of the present invention, the mounting strength is maintained for a long period of time because a shear force is not applied to a screw used when the back is connected to the leg via the vertical tongue. In addition, since the connecting elements such as the vertical tongue pieces are housed inside the backrest by using the surface material, the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair before attaching a backrest, showing one embodiment of the present invention.

FIG. 2 is an enlarged view in the direction of arrow II in FIG.

FIG. 3 is a right side view of the backrest used in the embodiment.

FIG. 4 is a partially cutaway view of FIG. 3;

FIG. 5 is an enlarged sectional view taken along line VV in FIG. 3;

FIG. 6 is a perspective view of the chair after the backrest is attached in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Leg 2a ... Protrusion end 5 ... Seat 6 ... Vertical tongue piece 7 ... Backrest 8 ... Screw 61 ... Mounting surface 62 ... Screw insertion hole 63 ... Fastener insertion hole 71 ... Back plate 71a ... Screw hole 71b ... Fastener mounting part 72 ... Surface material 72c Opening 72d Lower edge 72f Upper edge 75 Fastener

Claims (2)

(57) [Claims] 1. The left and right rear ends of the legs are projected above the seat,
A backrest mounting structure for a chair in which a backrest is mounted to a protruding end thereof via a vertical tongue, wherein the vertical tongue is rigidly attached to a leg, and has a mounting surface along the backrest, and a thickness direction. The backrest is provided with a back plate, and on the back surface of the back plate, a screw hole that is continuous with the screw insertion hole at the mounting position is provided, by fastening the screw hole of the back plate by inserting screws into the screw insertion hole of the vertical tongue, Ri Na by supporting the backrest legs, the fastener insertion hole penetrating in the thickness direction to the vertical tongue Set
On the other hand, the back plate has a
A fastener mounting part is provided on the inner surface of the surface material to cover the back plate.
Insert the fastener into the fastener through the fastener insertion hole.
A chair backrest mounting structure that is fixed to a snare mounting portion . 2. The left and right rear ends of the legs are projected above the seat,
Attach the backrest to the protruding end via a vertical tongue
The vertical tongue is rigidly attached to the leg, and is attached to the backrest of the chair.
Mounting surface and screw insertion holes penetrating in the thickness direction
The backrest is provided with a back plate, and the back plate
On the back of the screw connection hole at the mounting position
A screw hole is provided, and a screw is inserted into the screw insertion hole of the vertical tongue to insert the screw into the back plate.
By tightening the screw holes, the backrest is supported by the legs
The vertical tongue is provided with a fastener insertion hole penetrating in the thickness direction, while the back plate is provided with a fastener mounting portion continuous with the fastener insertion hole, and the back plate has an opening and has an opening. The upper surface of the upper part is covered with a bag-shaped surface material having a fastener projecting therefrom, and the fastener is inserted into the fastener insertion hole and fastened to the fastener mounting part, thereby opening the surface material. The upper and lower edges of the chair are closed so that the vertical tongue can be accommodated inside the backrest.