JPH06181826A - Production of back reverse side board of vehicle seat - Google Patents

Abstract

PURPOSE:To provide a manufacturing method for a back reverse side board of a vehicle seat, by which the manufacturing cost of the back reverse side board can be reduced by suppressing an increase in a process work, while using plural pieces of epidermal tissue material. CONSTITUTION:A joined epidermal tissue 2 of a prescribed shape is formed by welding a back reverse side board epidermal tissue material 2a, and a pocket side epidermal tissue material 2b allowed to adhere to the part which is covered with a pocket member and is invisible from the surface of a back reverse side board 1 by high frequency welding, and thereafter, this joined epidermal tissue 2 is formed integrally to a back reverse side board base material 1a of a thermoplastic resin by stamping forming.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a skin of a back board of a vehicle seat, and more particularly to a back of a vehicle seat in which a skin material composed of a plurality of skins is integrated with the back board. Regarding the manufacturing method of boards.

[0002]

2. Description of the Related Art Conventionally, as for a back and back board 11 for a vehicle, one skin 12 is usually integrated with the surface of the back and back board base material 11a made of a thermoplastic resin at the same time as stamping molding. Therefore, in the back and back board 11, a portion hidden behind the pocket member 13 attached to the back and back board is also covered with the skin material 12 similar to the surroundings.

However, as the skin material 12 of the back and back board 11 as described above, a skin material 12 having a good appearance and high quality and a high unit price is usually used in order to improve the appearance of the interior. On the other hand, the area of the pocket member 13 attached to the spine board 11 is quite large, and it is wasteful to use an expensive skin material 12 for the area hidden by the pocket member 13.

Therefore, it is appropriate to use the skin material 14 having a low unit price for the portion covered by the pocket member 13. In this case, the back board 11 is made of a different kind of skin material 1.
In order to cover with 2 and 14, first of all, the skin material 12 corresponding to a part of the back board 11 is made of a thermoplastic resin board substrate 11
It is integrated at the same time as stamping molding of a. Then, after this, there is a method in which an adhesive is applied to a portion where the board base material 11a is still exposed and the skin material 14 having a predetermined shape is press-bonded.

[0005]

However, according to this method, even if the skin material 14 having a low unit price is used, the number of steps and the number of molding dies to be used are increased, the productivity is remarkably deteriorated, and the cost is reduced in the end. On the other hand, it is no longer valid. Further, regarding the end treatment of the joint portion of the different skin materials 12 and 14, a method of concealing by providing a groove portion on the board base material 11a side may be considered, but as shown in FIG. The end of the material 14 may be seen from the outside, or the board base material 11a in the groove may be exposed.

In view of the above, the present invention provides a method for manufacturing a backboard of a vehicle seat, which is capable of reducing the manufacturing cost of the backboard by using a plurality of skin materials while suppressing an increase in process work. The purpose is to provide.

[0007]

According to the present invention, as a means for solving the above technical problems, a board base material is covered with a back and back board skin material, and a part of the back and back board skin material is covered. In a backboard of a vehicle seat to which a pocket member is attached, the backboard board skin material and a pocket-side skin material that is covered by the pocket member and adheres to a portion that cannot be seen from the backboard board surface are subjected to high-frequency welding. A method for manufacturing a backing back board for a vehicle seat, which is configured such that it is fused to form a joining skin having a predetermined shape, and then the joining skin is integrated with a backing back board base material of a thermoplastic resin by stamping molding.

[0008]

By virtue of the above structure, different types of skin materials are subjected to the high-frequency welding process so that both terminals are superposed and closely adhered to the inner surface. Therefore, the joined skins made of a plurality of skin materials are integrated by one stamping molding. Therefore, a skin material having a low unit price can be used for the portion that cannot be seen from the outside, and the manufacturing cost of the back and back board can be reduced.

[0009]

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a cross-sectional view (a) of a back and back board 1 formed by the method of the present invention and an enlarged cross-sectional view (b) of a bonded portion of a bonded skin 2 of the back and back board 1.
The back back board 1 is formed of a back back board base material 1a made of a thermosetting resin and a skin material, as in the conventional case.

The integrated skin material is a joint skin 2 formed of two skin materials, a back board skin material 2a on the upper side of the board and a pocket side skin material 2b on the lower side of the board. The back back board skin material 2a constitutes a portion that can be seen from the outer appearance of the back back board 1 (a portion where the pocket member 13 is not formed), and is cut into a predetermined shape along the upper side of the board 1 and is a board skin 3a. Is formed by laminating a foam 5a made of polyurethane foam or the like. As the skin material 2a, an expensive material having a good appearance and feel is usually used. The skin 3a is not particularly limited to synthetic leather, fabric, leather or the like which is normally used. Further, the pocket-side skin material 2b is the pocket member 13
It is a sheet body 5b of a thermoplastic resin such as a vinyl chloride resin cut into a predetermined shape so as to follow the shape of the lower side of the board hidden by the above. The pocket-side skin material 2b is a portion that is not particularly visible from the outside, and therefore a low-priced, low-quality product is used.

The back and back board skin material 2a and the pocket side skin material 2b are welded to each other by high-frequency welding at their predetermined ends. That is, first, a predetermined end of the pocket-side skin material 2b is aligned with the skin material 2b facing downward to the end of the skin material 2a with the skin 3a facing upward. That is, they are combined in a so-called middle table state. Further, the electrodes 6 for generating high frequency are pressed against and sandwiched between the upper and lower portions of these overlapped portions,
The skin materials 2a and 2b are continuously welded and moved along the line to be joined. As a result, the surface of the skin 3a of the skin 2a and the pocket-side skin 2b are welded to each other to form the joint portion 8.

The high-frequency welded skin material 2a as described above
The outer skin material 2b on the pocket side is the back board 1a as a whole.
It is an integrally joined skin 2 having a shape corresponding to. In addition, each of the ends serves as the joint portion 8 and is located on the back side of the joint skin 2 and is invisible from the surface.
In this way, since the joint skin 2 including the different skin materials 2a and the pocket-side skin material 2b is previously integrated, the integration into the board base material 1a becomes easy.

Next, when the back and back board substrate 1a is disposed so as to face the lower mold and is heated by the heating means between the upper and lower molds to be in a softened or molten state, the upper mold is placed on the lower mold. The joint skin 2 and the back board material 1a are formed into a predetermined shape and integrated.

In the back-back board 1 thus formed, the joint portion 8 is end-processed on the back side in advance, so that it is not necessary to provide a groove portion on the board base material 1a side. Furthermore, since the skin material is not adhered twice as in the conventional case,
There is no discrepancy in the bonding position between the skin materials during bonding, and the surface of the board substrate 1a is not exposed or the joining line is not twisted.

Further, since the high-frequency welding machine which is widely used is used, the process work is simplified as compared with the sewing using a sewing machine and the like, which requires a lot of manual work, and the tensile strength of the skin material 2 is reduced due to the formation of perforations. Don't worry. Further, according to the general-purpose high-frequency welding process, new equipment is not required and reliable and accurate welding can be performed.

[0016]

As described above, according to the present invention,
Stamping of thermoplastic resin by pre-bonding different kinds of skin materials, especially skin materials with different unit price, by high-frequency weld to be integrated into one back and back board on which pocket members are formed It is integrated at the same time as molding, and it is possible to easily manufacture a plurality of tailored boards. Therefore, it is possible to reduce the manufacturing cost by using a skin material having a low unit price as the pocket-side skin material.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a spine board of the present invention and a partially enlarged cross-sectional view thereof.

FIG. 2 is a cross-sectional view showing a state of joining different kinds of skin materials by a high-frequency weld.

FIG. 3 is a perspective view of the vehicle seat from the back side.

FIG. 4 is a cross-sectional view of a conventional spine board.

FIG. 5 is an enlarged perspective view when a plurality of conventional back and back boards are attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Back board 1a ... Back board base material 2 ... Joining skin 2a ... Back board skin material 2b ... Pocket side skin material 13 ... Pocket member

Claims (1)

[Claims] 1. A backboard board of a vehicle seat in which a board base material is covered with a backboard board skin material, and a pocket member is attached to a part of the backboard board skin material, wherein the backboard board skin material is provided. And a pocket-side skin material that is covered by the pocket member and adheres to a portion that is not visible from the back and back surface of the board by high-frequency welding to form a joint skin having a predetermined shape, and then by stamping this joint skin. A method for manufacturing a backing board for a vehicle seat, which is configured to be integrated with a backing board base made of a thermoplastic resin.