JPH06245841A - Method of manufacturing chair - Google Patents

Abstract

PURPOSE:To reduce the number of parts and the number of manufacturing steps by forming a synthetic resin for padding, which is ejected inside a mold before setting two-layered sheet made of a surface layer and a foamed layer inside the mold, and the two-layered sheet by low pressure pressing, and whereby making the seat back or the seat board made of the surface layer, the foamed layer, and the padding in a body. CONSTITUTION:The material sheet 14 is to be formed beforehand. This sheet is two layered, consisting of the surface layer 15 made of cloth, etc., and the foamed layer 16 made of foamed polypropylene, etc. Then, the resin 17 is to be ejected from the outlet 18 to form the padding on the inside surface of the lower mold 11, and the two-layered sheet 14, which is held between the crampers 19, is to be placed between the lower mold 11 and the upper mold 13. And then, after closing the two molds, the two-layered sheet is to be formed together with the padding by the low pressure pressing of the resin 17, and the padding 17' are to be formed in a body having the surface layer 15, the foamed layer 16, and the connecting part 17''. Through these the seat back part 12 is finished, and the connecting part 17'' is to be set in the chair arm part 20. In the same way, the seat board part 21 can also be made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a chair which is advantageous for office work, for example.

[0002]

2. Description of the Related Art For example, as shown in FIG.
A method for manufacturing an office chair having a structure including a seat plate portion 2, particularly a conventional method for manufacturing the back plate portion 1 and the seat plate portion 2 will be described. Regarding the back plate portion 1, a support for connecting and supporting a backrest arm 3 is provided. For example, a wooden base frame 5 for attaching the member 4 to the back surface, and for the seat plate portion 2, the wooden base frame 5 for fixing the pedestal 7 supported by the leg stand 6 to the lower surface is formed into a predetermined shape by, for example, homing. Bending is performed, and then, a foam sheet (sponge sheet) 6 and a skin 7 are attached to the front side of the base frame 5 in this order, and the edge of the skin 7 is applied to the back side of the base frame 5, and the skin side The back plate portion 1 or the seat plate portion 2 is configured by fastening the edges with staples or the like.

Reference numeral 8 denotes a decorative cover for blinding the back side surfaces of the back plate portion 1 and the seat plate portion 2.

[0004]

As described above, the conventional structure of the back plate portion 1 and the seat plate portion 2 has a base frame 5 formed in a predetermined shape by homing or the like, and a sponge to be superposed on the front side of the base frame 5. Since it is a combination of the sheet 6 and the outer skin 7, a base frame forming step for forming the base frame 5 into a predetermined shape, an overlapping step of covering the base frame 5 with the sponge sheet 6 and the outer skin 7, and a base frame On the back side of No. 5, a sponge sheet applied and a fastening step for stapling the edges of the epidermis are required, so that wrinkles do not occur on the surface of the base frame through the sponge sheet 6. Requires skill to stick.

It takes time and effort to staple the epidermis to the base frame.

In order to configure the seat plate portion or the back plate portion, at least the respective constituent members such as the base frame, the supporting member, the foamed sheet, and the skin are required, and the cost for producing those members and the parts Due to the fact that the points increase, there are some things that are detrimental to economic efficiency and productivity.

[0007]

The present invention has been made by paying attention to such a conventional drawback, and prior to setting a two-layer sheet having a skin layer and a foam layer integrated in a molding die, A resin for molding a core material (base frame) is injected and injected into the molding die, and the resin and the two-layer sheet are press-molded by a lowering press means so that the skin, the foam layer, and the core material are integrated. It is to manufacture a back plate part or a seat plate part of a chair.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 3, 11 is a back plate member 12 of the chair.
A lower die of a mold for molding (see FIG. 6) and an upper die 13 corresponding to the lower die 11. Reference numeral 14 is a preformed material sheet, and the material sheet 14 includes a skin layer 15 such as cloth and a foam layer 16 made of foam polypropylene or the like.
It is a two-layer sheet consisting of. Further, the lower mold 11 is provided with an injection port 18 for injecting a hard resin 17 which is a core material (base).

Next, the manufacturing method of the back plate member 12 will be described. An appropriate amount of the resin 17 for molding the core material is injected and supplied to the mold surface of the lower mold 11 before the mold is closed. Then the lower mold 1
After the two-layer sheet 14 sandwiched by the clamper 19 is positioned between the upper mold 1 and the upper mold 13, both upper and lower molds are closed, and at the same time the core material is formed by the low pressure pressing force of the resin 17. A two-layer sheet 14 is formed, and a core material 17 'having a skin layer 15, a foam layer 16 and a connecting portion 17 "is formed.
Is an integrally molded product (see FIG. 4).

After the molded product is molded in this manner, the mold is opened as shown in FIG. 5 and the extra portion of the molded product is trimmed by the next step (not shown) to form the desired back plate member 12. To complete.

The completed back plate member 12 is a chair arm member 20 having a well-known structure using the connecting portion 17 "of the core member 17 '.
It may be attached by a well-known fixing means.

Although the manufacturing method of the back plate member 12 is described in the above embodiment, the seat plate member 21 can be manufactured by a similar manufacturing method. Further, as shown in FIG. 7, a chair member 22 in which the back plate member 12 and the seat plate member 21 are integrally structured can also be produced in the same process as the manufacturing method of the back plate member 12.

Reference numeral 23 shown in FIG. 6 is a chair arm 20.
Alternatively, a decorative plate attached for improving the appearance of the back surface or the lower surface of the back plate member 12 or the seat plate member 21 attached to the chair stand 24 is shown.

[0015]

As described above, according to the present invention, when the back plate member 12, the seat plate member 21 or the chair member 22 which is a constituent member of the chair is manufactured, the skin layer 15 is formed in a predetermined mold.
The two-layer sheet 14 in which the foam layer 16 and the foam layer 16 are integrated is positioned, and a resin for molding a core material is injected to form the two-layer sheet 14 described above.
By using low-pressure pressing means with the core material molding resin 17, a three-layer molded product in which the two-layer sheet 14 and the core material molding resin 17 are integrated is obtained.

Therefore, according to the present invention, a foam layer,
Since members such as the back plate member 12 and the seat plate member 21 of the chair configured in the order of the skin layers can be produced by the press molding process using the mold device having a single structure, the conventional construction method, that is, the core material is applied. It is possible to save a great deal of work by covering the foamed sheet and the skin sheet and then fixing the foamed sheet and the skin sheet with the stapling means, which makes it possible to reduce the number of parts used and the manufacturing process. The economy of chair production is greatly improved.

Further, according to the present invention, it is possible to easily change the chair shape by changing the mold, and it is possible to obtain an effect that it is simple and it is easy to provide a chair having a feeling according to the user's request. To be

[Brief description of drawings]

FIG. 1 is a perspective view of a chair showing a conventional example.

FIG. 2 is a sectional explanatory view showing a chair structure of a conventional example.

FIG. 3 is an explanatory view of the manufacturing process of the chair back plate member according to the embodiment of the present invention.

FIG. 4 is an explanatory view of a manufacturing process of the chair back plate member according to the embodiment of the present invention.

FIG. 5 is an explanatory view of the manufacturing process of the chair back plate member according to the embodiment of the present invention.

FIG. 6 is an explanatory cross-sectional view of a chair obtained according to the embodiment of the present invention.

FIG. 7 is an explanatory cross-sectional view of a chair obtained according to another embodiment of the present invention.

[Explanation of symbols]

11 ... Lower mold 12 ... Back plate member 13 ... Upper mold 14 ... Two-layer sheet 15 ... Skin layer 16 ... Foam layer 17 ... Resin 17 '... Core material 17 ″ ... Connection part 18 ... Ejection port 19 ... Clamper 20 ... Chair arm Member 21 ... Seat plate member 22 ... Chair member 23 ... Decorative plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B29C 45/16 7344-4F 45/56 9156-4F // B29K 105: 04 B29L 9:00 4F 31 : 44 4F

Claims (1)

[Claims] 1. A two-layer sheet (14) in which a skin layer (15) and a foam layer (16) are integrated is located in a pair of molds, and a resin (17) for molding a core material is located in the molds. ) Is injected, and then the core material (17 ') which is integral with the above-mentioned two-layer sheet and integrally has the connecting portion (17 ") is formed by low pressure press molding by a press by closing the mold (). 12), (21) or (22) is manufactured, The manufacturing method of the chair characterized by the above-mentioned.