JPS6253691A - 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 1 cushioning material,
It consists of a skin material that covers this.

This skin material is attached to a cushion material by joining its corresponding edges to be joined (for example, Japanese Utility Model Publication No. 58-34700).

(Problem to be Solved by the Invention) In the above-mentioned conventional configuration, the joint between the edges to be joined protrudes from the general surface of the outer surface of the cushion body. There is an inconvenience that the nail gets caught in this joint and feels uncomfortable.

Furthermore, since the joint 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.

(Objective of the Invention) This invention was made in view of the above-mentioned circumstances, and aims to provide a cushion body with a good feel to the outer surface and to improve the external appearance of the cushion body. 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 joint between the edges of the skin material to be joined is stored in the storage groove. The point is to prevent the joint 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 a headrest 1, which is an example of a cushion body, will be explained with reference to FIGS. 1 and 2.

The headrest 1 is composed of a cushion material 2, a skin material 3 that covers the cushion material 2, and a stay 5 that supports the cushion material 2 covered with the skin material 3 on the upper end of the seat back 4a of the seat 4.

The cushion material 2 is made of a foamed resin such as urethane and is elastically deformable. The biped 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 fabric 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 fabric is made of polyester or acrylic resin.

The above-mentioned skin material 3 is composed of a pair of front and rear skin materials 3a83b provided so as to sandwich the cushion material 2 from the front and back,
These corresponding edges 7 to be joined are welded to each other, and the skin material 3 is attached to the cushion material 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 M. 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 M. In this case, the shape of each edge 7 of the front and rear skin materials 3a, 3b to be joined is the same as that of the cushion material 2.
It is said to have been bent in the direction away from the

In FIG. 4, a strip-shaped rigid core material 8 made of resin is attached to the cushion material 2 side surface of each of the edges 7 to be joined by welding or stitching. In this case, the core material 8 may be attached only to one edge 7 to be joined.

In FIG. 5, the front and rear skin materials 3a and 3b are overlapped. Then, the ends of the welded edges 7, 7 to which the core material 8 is attached are sandwiched between the welding dies 12 and 12 of the high-frequency welding machine 11 and heat-welded. At this time, a cutting blade (not shown) formed at the tip of the welding die 12 simultaneously cuts the edge 7 to be welded.
．． The welding margin 7 is removed, and the protruding end 7a is cut and removed. In the above case, the ends of the edges 7 to be joined may be joined by stitching.

On the other hand, on the surface of the cooking material 2, a storage groove 9 having a U-shaped cross section is formed that extends 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 that are joined to each other, and the joint portions of the respective joined edges 7.7 are made to correspond to the positions of the storage grooves 9.

In FIG. 6, the joined portion of the edges 7, 7 to be joined is pressed toward the storage groove 9 (arrow A in the figure). And storage groove 9
The core members 8 are each turned over within the storage groove 9 while pushing out the inner wall 9a of the core member 8. Inversion of the core material 8 in this case is performed with compressive deformation of the cushion material 2 and tensile deformation of the skin material 3. This reversal is continued until each core member 8 faces each corresponding inner wall 9a.

In FIG. 7, when the above-mentioned reversal is completed, the joint portion of both edges 7 to be joined together with the core material 8 is stored in the storage groove 9. That is, as described above, when the core material 8 is reversed in the storage groove 9, the cushion material 2 is compressively deformed, and the front and rear skin materials 3a and 3b are deformed in tension. Therefore, once the above reversal is completed, these cushion materials 2
Since the front and rear skin materials 3a and 3b tend to return to their free states due to their elastic force, the joined portions of these joined edges 7 and 7 are automatically stored in the storage groove 9. As a result, the skin material 3 is attached to the cushion material 2, and the second
A headrest l as shown in the figure is formed.

Note that, although the cushion body is 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, a rigid core material is attached to the cushioning material side surface of the edge to be joined in the skin material, and the ends of both edges to be joined are joined together, while the surface of the cushioning material is A storage groove is formed extending along the joining position of the edges to be joined, and then, while pushing and expanding the inner wall of this storage groove, the core material is inverted within this storage groove, and both covers are attached together with this core material. Since the joint portions of the joining edges are accommodated in this storage groove, the joint portions of the skin material to be joined are prevented from protruding from the general surface of the outer surface of the cushion body. Therefore, fingers or the like are prevented from getting caught in this joint, so that the cushion body feels good. Also,
In this case, since the joint part is stored in the storage groove with elastic deformation of the inner wall of the storage groove, the joint part is prevented from being freely pulled out from the storage groove, and this storage state is ensured. is maintained.

In addition, as mentioned above, since the joint portion is prevented from protruding from the general surface of the outer surface of the cushion body, the joint 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, and FIG. 1 is a perspective view of a headrest, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG.
7 to 7 are explanatory cross-sectional views showing a method of attaching the skin material. 1. Headrest (cushion body), 2. Cushion material, 3. Outer skin material, 7. Edge to be joined, 8. Core material,
9...Storage groove, 9a...Inner wall. Patent applicant Daihatsu Motor Co., Ltd. (same as above) Fuji Seat Co., Ltd. (same as above) Toyo Tire & Rubber Industries, Ltd.) Yuhe 1, i-, /”

Claims (1)

[Claims] 1. A method of covering a cushioning material with a skin material, joining the corresponding edges of this skin material to be joined, and attaching this skin material to the cushioning material. A rigid core material is attached to the surface, and the ends of both edges to be joined are joined together, while a storage groove is formed on the surface of the cushion material to extend along the joining position of these edges to be joined, and then, A cushion such as a headrest characterized in that the core material is inverted within the storage groove while expanding the inner wall of the storage groove, and the joint portion of both edges to be joined together with the core material is stored in the storage groove. How to attach body skin material.