JPH0671755A - Manufacture of chair and framework for manufacturing chair - Google Patents

Abstract

PURPOSE:To easily and surely join a mounting sheet to cushioning material provided on the uneven face of a chair to unify both and to enable a framework to correspond to manufacture of the chair of many kinds and a small lot in a simple equipment. CONSTITUTION:In a method for manufacturing a chair having an uneven face, cushioning material 13 is formed so as to be matched with the uneven face of the chair. The surface of cushioning material 13 is coated with heat adhesive resin 14 and then covered with mounting material 12 such as leather, synthetic leather and cloth. Thereafter cushioning material 13 and mounting material 12 are allowed to tightly adhere to a framework 15 formed into a shape corresponding to the uneven face of the chair and then heated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a chair having an uneven surface and a chair manufacturing frame. In detail, it is possible to easily and surely join and integrate the cover sheet with the cushion material on the uneven surface of the chair, and it is possible to easily manufacture a wide variety of small chairs with simple equipment. A chair manufacturing method, and lightweight and easy to handle,
Moreover, the present invention relates to a chair manufacturing formwork that can easily and surely adhere the covering sheet to the cushion material on the uneven surface of the chair.

[0002]

2. Description of the Related Art Conventionally, the manufacturing of a chair having an uneven surface has been carried out by using FIG.
It was done using the formwork shown in. Form 5 in FIG.
Is formed in a shape corresponding to the uneven surface of the chair to be molded, and innumerable holes are opened in the mold 5, and the air in the mold is separated by a suction pump (not shown) separately provided through this hole. Is inhaled. Then, a cover sheet 2 such as a cloth or leather having an airtight sheet 4 adhered to the back surface is laid in the mold 5 and, in this state, a synthetic resin such as urethane foam forming the cushion layer 3 is injected and foamed, and the air is taken in. By doing so, as shown in FIG.
The cushion layer 3 is joined and integrated on the back surface, and the surface mounting sheet 2 and the cushion layer 3 can be molded along the shape of the mold 5.

[0003]

However, when a chair is manufactured by the above method, since air is taken in at the time of molding,
The molding frame is not only robust, but also requires high precision and high airtightness. Therefore, in order to manufacture one type of chair, a very expensive formwork must be manufactured, which is not suitable for manufacturing many types of chairs in a small lot.

Further, in this method, since the uneven surface is accurately molded by sucking the cover sheet having the airtight sheet adhered to the back surface, depending on the kind of the cover sheet, There are some cases where the adhesion to the sheet cannot be sufficiently performed, and there is a limitation on the type of the covering sheet that can be used in this method.

Further, according to this method, the cushion layer is joined and integrated on the back surface of the cover sheet, and when the cover sheet is wrinkled when the cover sheet and the cushion layer are formed, it cannot be redone and the product itself is defective. Had to be disposed of as.

The present invention has been made in view of the above problems, and it is possible to easily and surely join and integrate the cover sheet with the cushion material on the uneven surface of the chair with simple equipment. It is an object of the present invention to provide a chair manufacturing method and a chair manufacturing form which can be used for manufacturing a wide variety of small chairs.

[0007]

In order to achieve the above object, the invention according to claim 1 is a method for manufacturing a chair having an uneven surface, wherein the cushion material is formed in conformity with the uneven surface of the chair. The surface of the cushion material is coated with a heat-adhesive resin, and then the surface of the cushion material is covered with a cover sheet such as leather, synthetic leather, or cloth, and then the cushion material is formed into a form that corresponds to the uneven surface of the chair. Also, the gist is a method for manufacturing a chair, which is characterized in that a covering sheet is closely contacted and heated.

A second aspect of the present invention is a method for manufacturing a chair having an uneven surface, wherein a heat-adhesive resin is applied to the surface of a cushion material formed to match the uneven surface of the chair, and then the cushion material The surface is covered with a cover sheet such as leather, synthetic leather, cloth, etc., and then the cushion material covered with the cover sheet is immersed in hot water, so that the cushion material covered with the cover sheet is heated with hot water and applied. The gist is a method of manufacturing a chair characterized by pressing.

The invention according to claim 3 is a mold for manufacturing a chair having an uneven surface, wherein the mold is formed into a shape corresponding to the uneven surface of the chair, and copper, iron, carbon, The form of the chair manufacturing form is characterized in that it contains a heat-generating substance such as ceramics.

The chair manufacturing method of the present invention will be described below in detail with reference to the drawings. First, as shown in FIGS. 1, 2 and 3, the thermoadhesive resin 14 is applied to the surface of the cushion material 13. The cushion material 13 is formed by foaming a foamed resin such as a urethane resin, a phenol resin, a urea resin or the like into the same shape according to the uneven surface of the chair. As the heat-adhesive resin, ethylene-vinyl acetate copolymer type, synthetic rubber type, polyamide type and polyester type are preferable, and the heat-adhesive resin is sprayed on the surface of the cushion material in the form of emulsion or the cushion material in the form of sol. It is applied by applying it to the surface. It is also possible to use a film-shaped thermo-adhesive resin that is cut according to the shape of the cushion material and stack it on the surface of the cushion material.

Next, as shown in FIGS. 1, 2 and 4,
The surface of the cushion material 13 is covered with the cover sheet 12.
Any material such as natural leather, synthetic leather, or cloth can be used as the cover sheet 12. This cover sheet 12
Is sewn into a bag shape according to the shape of the cushion material 13, and is inserted into the cushion material 13 coated with the heat-adhesive resin 14 to cover the entire cushion material 13. At this stage, the seating sheet 12 is stretched along the cushion material 13 to match the shape of the cushioning material 13 so that the seating sheet 12 is not wrinkled.

Next, as shown in FIGS. 1, 2 and 5,
The cushion material 13 and the cover sheet 12 are brought into close contact with a mold 15 formed in a concave-convex shape corresponding to the concave-convex surface 16 of the chair 11, and the cushion material 13 and the cover sheet 12 are heated. The mold frame 15 is formed with unevenness 17 corresponding to the uneven surface 16 of the chair 11. By fitting the cushion material 13 and the seating sheet 12 into the mold frame 15 and bringing them into close contact with each other, the seating sheet 12 is moved to the form frame 15. Between the unevenness 17 and the uneven surface of the cushion material 13, there is no gap or wrinkle, and it is deformed. Then, in this state, the mold 15 is externally heated, or when the mold 15 itself generates heat, the heat is transmitted to the cover sheet 12, and is further applied to the surface of the cushion material 13 via the cover sheet 12. It will be transmitted to the heat adhesive resin 14. The heat-adhesive resin 14 has an adhesive property when it receives heat, so that the cover sheet 12 and the cushion material 13 are joined and integrated.

When the cover sheet 12 is joined and integrated with the cushion material 13, the cushion material 13 and the cover sheet 1 are integrated.
2 may be brought into close contact with the mold 15 by its own weight, but when the uneven surface has a large undulation or its shape is complicated, or when the weight of the cushion material 13 and the cover sheet 12 is light, the mold 2 The cushion material 13 and the cover sheet 12 may be pressed against 15 from the back side.

Next, a method of manufacturing the chair according to claim 2 will be described. In this manufacturing method, the step of applying a heat-adhesive resin to the surface of the cushion material molded to match the uneven surface of the chair, and the step of coating the surface of the cushion material with a cover sheet such as leather, leather, or cloth are the above-mentioned claims. Since it is the same as the invention described in Item 1, its explanation is omitted.

In this chair manufacturing method, the cushion material covered with the cover sheet is immersed in hot water to heat and pressurize the cushion material covered with the cover sheet. There is. That is, according to the invention of claim 1, the cushion material covered with the covering sheet is closely adhered to the formwork in which the unevenness corresponding to the uneven surface of the chair is formed, and the cushion material is heated on the uneven surface of the chair. While the attachment of the cover sheet is realized, in the invention of claim 2, the cushion material covered with the cover sheet is heated with hot water and pressed to bond the cover sheet to the cushion material on the uneven surface of the chair. Has been realized.

The hot water in the present invention means water heated to a temperature at which heat necessary for the thermoadhesive resin applied to the surface of the cushion material to have adhesiveness can be given,
As shown in FIG. 7, the cushion material 13 covered with the cover sheet 12 is submerged in the hot water 21 and immersed in the hot water 21. The water pressure is applied, and the cover sheet 12 adheres closely to the shape of the cushion material 13.
At the same time, the heat of the hot water is transferred to the cushion material 13 covered with the cover sheet 12, the heat is transferred to the cover sheet 12, and the heat-adhesive resin 14 applied to the surface of the cushion material 13 via the cover sheet 12 is also transferred. Will be transmitted to.
The heat-adhesive resin 14 has an adhesive property when it receives heat, so that the cover sheet 12 and the cushion material 13 are joined and integrated.

Next, the chair manufacturing form according to claim 3 will be described. This formwork is used in the method of manufacturing a chair according to the above-mentioned claim 1, and as shown in FIG. 6, the formwork has irregularities 17 such as grooves and protrusions corresponding to the uneven surface of the chair. It is formed, and copper, iron,
A heat generating material 19 such as carbon or ceramics is included.

The material used for the mold is not particularly limited to metals, synthetic resins and ceramics, but synthetic resins such as fiber reinforced plastic (FRP) are preferable in terms of strength, handleability, moldability and cost. Any heat-generating substance contained in the mold may be used as long as it has a function of generating heat when energized. Specifically, Ni-Cr alloys, Ni-Cr-Fe alloys, Fe-Cr-Al alloys are used. Examples include metals such as alloys, non-metals such as carbon, silicon carbide, molybdenum silicate, and zirconia. Above all, Ni-Cr
System alloys and carbon are preferable because they are cheaper than other alloys.

This exothermic substance may be contained in the form material in the form of powder, granules or fibers, or it may be formed by molding the exothermic substance into a sheet or line and embedding it in the material. I don't mind. In addition, when the exothermic substance is contained in the form material in the form of powder, granules or fibrous, a large amount in the form may not only increase the cost but also reduce the strength of the form. Therefore, its content may be appropriately determined in consideration of the size of the mold, the material, the material of the chair, and the like.

As shown in FIGS. 5 and 6, the entire cushion material 13 in which the heat-bonding resin 14 is applied to the mold 15 constructed as described above is covered with the covering sheet 12 and fitted into it (if necessary). Accordingly, the cushion material 13 and the cover sheet 12 are pressed from the back surface). As a result, the cover sheet 12 is deformed by being sandwiched between the unevenness 17 of the mold 15 and the uneven surface of the cushion material 13 without any gap or wrinkle. In this state, electricity is supplied from the terminal 20 provided on the mold 15. As a result, the entire mold 15 is heated through the exothermic substance 19 contained in the mold 15, and the cushion material 13 and the cover sheet 12 that are in close contact with this are heated. Then, the heat from the mold 15 is transmitted to the cover sheet 12, and is further transferred to the thermo-adhesive resin applied to the surface of the cushion material 13 through the cover sheet 12. The heat-adhesive resin has an adhesive property when it receives heat, so that the cover sheet 12 and the cushion material 13 are joined and integrated.

[0021]

According to the present invention, the above-mentioned structure is provided.
In the method of manufacturing a chair described above, a heat-adhesive resin is applied to the surface of a cushioning material formed to match the uneven surface of the chair, and then the surface of the cushioning material is covered with a cover sheet such as leather or cloth. After that, since the cushion material and the covering sheet are heated by closely contacting them with the mold formed in the shape corresponding to the uneven surface of the chair, it is easy to join and integrate the covering sheet with the cushion material on the uneven surface of the chair. Can be done. Further, when the surface of the cushion material is covered with the cover sheet, the cover sheet is sufficiently stretched to prevent wrinkles, and then closely adhered to the form, and the cover sheet is integrally bonded to the cushion material, so that defective products are less likely to occur. , Can manufacture highly efficient chairs.

Further, in this method, the cushion material and the covering sheet are simply brought into close contact with the mold frame formed into a shape corresponding to the uneven surface of the chair, and heating is performed as in the conventional method. It is not necessary to use molds, airtight sheets, suction pumps, etc. that can perform air intake at the same time, and simple equipment is sufficient. Further, in this method, since it is not necessary to use an airtight sheet for suction, there is no limitation on the type of the covering sheet used.

In this method, a mold formed in a shape corresponding to the uneven surface of the chair is used, and the cushion material formed in advance on the uneven surface of the chair is covered with a cover sheet. By closely contacting and heating, the cushioning material can be joined and integrated with the covering sheet. Therefore, unlike the conventional method, it is not necessary to use an expensive formwork capable of performing molding and suction at the same time, and it is possible to cope with the production of a wide variety of small chairs.

In the chair manufacturing method according to the second aspect of the present invention, the cushioning material of the exterior seat is applied to the cushioning material by immersing the cushion material whose surface is coated with the heat-adhesive resin and covered with the exterior seat in hot water. It is designed to be joined and integrated. For this reason, a mold, a heat source, a pressurizing means, etc. for joining and unifying are unnecessary, and a highly efficient and reliable chair can be manufactured.

In the chair manufacturing mold according to claim 3, the mold is molded into a shape corresponding to the uneven surface of the chair, and contains a heat generating substance such as copper, iron, carbon or ceramics. Therefore, the energizing substance generates heat by heating the mold to heat the mold, and accordingly, the cushion material and the covering sheet that adhere to the mold are heated, and the covering sheet and the cushioning material are joined and integrated. It has become so. Therefore, it is not necessary to provide a heating means for heating the cushioning material and the covering sheet separately from the mold, and the weight is light, the handling is easy, and the joining of the covering sheet to the cushioning material is surely performed. You can

Further, this formwork is inexpensive because it is formed in a shape corresponding to the uneven surface of the chair and has a simple structure in which a heat-generating substance is contained in the formwork, and is inexpensive. Can handle a wide variety of products and small lots.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a chair manufactured by the method of the present invention.

FIG. 2 is an enlarged sectional view of the chair shown in FIG.

FIG. 3 is an enlarged cross-sectional view showing a state in which a thermoadhesive resin is applied to the surface of the cushion material.

FIG. 4 is an enlarged cross-sectional view showing a state in which a cushion material coated with a heat adhesive resin is covered with a cover sheet.

FIG. 5 is an enlarged cross-sectional view showing a state in which a cushion material covered with a cover sheet is brought into close contact with a mold.

FIG. 6 is a perspective view showing a chair manufacturing form.

FIG. 7 is a cross-sectional view showing a state in which a cushion material covered with a cover sheet is immersed in hot water.

FIG. 8 is a perspective view showing a chair manufactured by a conventional manufacturing method.

FIG. 9 is an enlarged cross-sectional view showing a chair and a formwork in a conventional manufacturing method.

[Explanation of symbols]

 11 ・ ・ ・ Chair 12 ・ ・ ・ Covering sheet 13 ・ ・ ・ Cushion material 14 ・ ・ ・ Thermal adhesive resin 15 ・ ・ ・ Form 16 ・ ・ ・ Unevenness

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B29L 31:58 4F

Claims (3)

[Claims] 1. A method of manufacturing a chair having an uneven surface, comprising the steps of applying a heat-adhesive resin to the surface of a cushioning material molded to conform to the uneven surface of the chair, and then subjecting the surface of the cushioning material to leather or synthetic leather. A method for manufacturing a chair, comprising covering with a cover sheet such as cloth, and then heating the cushion material and the cover sheet in close contact with a mold formed into a shape corresponding to the uneven surface of the chair. 2. A method for manufacturing a chair having an uneven surface, wherein a heat-adhesive resin is applied to the surface of a cushion material formed to match the uneven surface of the chair, and then the surface of the cushion material is made of leather or synthetic leather. It is characterized in that the cushion material covered with the covering sheet is covered with a covering sheet such as cloth, and then the cushioning material covered with the covering sheet is immersed in hot water to heat and pressurize the cushioning material covered with the covering sheet with hot water. Chair manufacturing method. 3. A formwork for manufacturing a chair having an uneven surface, wherein the formwork is molded into a shape corresponding to the uneven surface of the chair, and is made of a heat-generating substance such as copper, iron, carbon or ceramics. A chair manufacturing formwork characterized by containing.