JPS6253692A - Method for mounting skin material to cushion body such as headrest - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for attaching a skin material to a cushion body such as a headrest attached to an automobile seat.

(Prior art) For example, the above headrest usually includes a cushion material,
This skin material is attached to the cushion material by sewing the corresponding edges to be joined together (for example, in Japanese Utility Model Application No. 58-347
Publication No. 00).

However, since the work of sewing the skin material is complicated, recently, in order to make this work easier, the skin material is made of resin that can be welded, and the corresponding edges of the skin material to be joined are heat-welded. There are some products in which a skin material is attached to a cushion material using this method.

Conventionally, the work of attaching the skin material as described above has been carried out as follows. That is, each edge of the skin material covering the cushioning material to be joined is bent in a direction away from the cushioning material, and the bent portions are sandwiched and heat welded. At the same time as this welding, both bent ends are cut and removed. In this way, the skin material is attached to the cushion material.

(Problem to be Solved by the Invention) By the way, when the skin material is attached as described above, the welded portion between the edges to be joined protrudes from the general surface of the outer surface of the cushion body, so it is difficult to touch this outer surface with, for example, the hand. In some cases, fingers and fingernails may get caught in the welded portion, resulting in an unpleasant sensation.

Furthermore, since the welded portion protrudes from the general surface of the outer surface of the cushion body, it is easily visible, which is not desirable in terms of appearance.

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and aims to improve the feel of the cushion body against the outer surface and to make the external appearance of the cushion body more convex. purpose.

(Structure of the Invention) A feature of the present invention for achieving the above object is that a storage groove is formed in the cushion material, and the welded portion of the edges of the skin material to be joined is stored in the storage groove. The purpose is to prevent the welded portion from protruding from the general surface of the outer surface of the cushion body.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the headrest 1, which is an example of a cushion body, will be explained with reference to Fig. m1 and Fig. 2.

The headrest seat is composed of a cushion material 2, a skin material 3 that covers this cushion material 2, and a stay 5 that supports the cushion material 2 covered with this skin material 3 on the upper end of the seat 8 4a of the seat 4. .

゛The cushion material 2 is made of foamed resin such as urethane and is elastically deformable. The skin material 3 is made of thermoplastic resin that can be heat-welded and is elastically deformable, and is composed of a sheet material and a fabricator formed on the surface of the sheet material (not shown).

Further, for example, the sheet material is made of vinyl chloride or ABS resin, and the fabricator is made of polyester or acrylic resin.

The skin material 3 is composed of a pair of front and rear skin materials 3a and 3b provided to sandwich the cushion material 2 from the front and back, and the corresponding edges 7 of these materials to be joined are welded to each other so that the skin material 3 becomes the cushion material. It is attached to 2.

Next, a method for attaching the skin material 3 to the cushion material 2 will be explained with reference to FIGS. 3 to 7.

In FIG. 3, first, the front and rear skin materials 3a and 3b covering the cushion material 2 are vacuum formed as follows. That is, the front and rear skin materials 3a and 3b, which are initially flat, are joined to the mold 8. Then, by heating this and making the space S between them negative pressure, the front and rear skin materials 3a, 3b are
is deformed along the mold 8. In this case, the shape of each edge 7 to be joined of the front and rear skin materials 3a and 3b is such that after being bent toward the -H cushioning material 2 side, the ends are folded back in a direction away from the same cushioning material 2. Ru.

In FIG. 4, a storage groove 9 having a U-shaped cross section is formed on the surface of the cushion material 2, extending along the joining position of the edges 7 to be joined. Although not shown, this storage groove 9 is also formed by a mold.

Then, the cushion material 2 is covered with the front skin material 3a and the rear skin material 3b so as to sandwich the cushion material 2, and the edges 7 to be joined are made to correspond to the positions of the storage grooves 9.

In FIG. 5, a folded portion 7a of the double welding edges 7, 7 is formed by a pair of welding dies 12.12 in high frequency welding @ti.
These welding molds 12 and 12 are brought close together so as to sandwich them. At this time, the tip of the welding mold 12.12 presses the surface of the skin material 3 to elastically compress and deform the cushion material 2. At the same time, the re-welding molds 12.12 approach the front and rear skin materials 3a, 3b so as to tensilely deform them to some extent. These welding molds 12, 12 sandwich both folded portions 7a, 7a.

In FIG. 6, between the welding molds 12 and 12 sandwiching the folded parts 7a and 7a, the folded parts 7a and 7a are
are heated and welded using high frequency.

In FIG. 7, at the same time as the welding, the re-welding mold 12.
12 are brought closer to each other, and a cutting blade (not shown) formed at the tip of the welding die 12 cuts and removes the protruding end side 7a' of the folded portions 7a, leaving a welding margin of the folded portions 7a, 7a.

In the above case, each edge 7 to be welded has a shape bent toward the -H cushioning material 2 side as described above, and the cushioning material 2 is compressed when the welding molds 12 and 12 approach each other as described above. Deformed front and rear skin materials 3a,
3b has been tensilely deformed, the folded parts 7a, 7a
When the welding mold 12.12 is released from the welding mold 12.12, the cushioning material 2 and the front and rear skin materials 3a, 3b try to return to a free state due to their elastic force, so that the welded edges 7.7 The welded part is automatically stored in the storage groove 9. As a result, the skin material 3 is attached to the cushion material 2, and the headrest 1 as shown in FIG. 52 is formed.

In addition, although the cushion body was exemplified by the headrest 1 above, the cushion body may be, for example, a seat, an armrest, a sun visor, etc. in an automobile.

(Effects of the Invention) According to the present invention, the edge to be joined is bent toward the -H cushioning material side, and then the end thereof is folded back in the direction away from the same cushioning material, while the surface of the cushioning material is A storage groove extending along the joining position of these edges to be joined is formed, and then the folded portions of the corresponding edges to be joined of the skin material are joined and welded. The welded portion between the edges will be stored in the storage groove. Therefore, this welded part
The first cushion is prevented from protruding from the general surface of the outer surface of the body, and thus fingers or the like are prevented from getting caught in the welded portion, and the cushion body feels good.

Furthermore, since the welded portion is prevented from protruding from the general surface of the outer surface of the cushion body as described above, the welded portion is not easily visible, and therefore, the appearance of the cushion body is improved. result.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of a headrest, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Figs. 3 to 7 show a method of attaching the skin material. It is an explanatory sectional view. ■・Headrest (cushion body), 2-・ri,
John material, 3. Skin material, 7. Edge to be joined, 7a-. Turned part, 9. Storage groove. Patent applicant Daihatsu Motor Co., Ltd. Same as above Fuji Seat Co., Ltd. Same as above Toyo Rubber Industries, Ltd. Figure 4 Figure 5

Claims (1)

[Claims] 1. A method for attaching this skin material to the cushion material by covering the cushion material with a resin skin material and welding the corresponding edges of the skin material to be joined together. After being bent toward the cushioning material side, the end portion is folded back in the direction away from the cushioning material, and on the other hand, a storage groove is formed on the surface of the cushioning material that extends along the joining position of the edges to be joined. .Next, a method for attaching a skin material to a cushion body such as a headrest, characterized in that the folded portions of the edges to be joined are joined together and welded.