JPH0613692U - Seat back - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that the back cover board of the seat back of a vehicle seat has sufficient rigidity. In a seat back that supports the back of an occupant of a seat of a vehicle or the like, a back cover board that covers the back surface of the seat back is formed of a thermoplastic synthetic resin base material and a triaxially woven fabric having restraint properties. A seat back with a structure in which a shaft restraint reinforcement material and a skin material are sequentially laminated and laminated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat back, and more particularly to a seat back having an improved back cover board.

[0002]

[Prior art]

Seat backs of conventional vehicles use a back cover board on the back side. FIG. 3 shows the entire conventional seat back, and FIG. 4 shows the sectional structure of the back cover board of the seat back shown in FIG. 3 and 4, the seat 5 includes a seat cushion 6 and a seat back 7. The seat back 7 supports the back of a seated person seated on the seat 5, and a back cover board 8 is mounted on the back surface 71 of the seat back 7. As shown in FIG. 4, the back cover board 8 is formed by adhering a skin material 82 to a polypropylene base material 81 having a thickness T ₁ . The skin material 82 is made by adhering a skin 82b to a polypropylene foam 82a. When the seat 5 is mounted on a vehicle or the like, another seat (not shown) is arranged at the rear of the seat 5, and a seated person seated on the rear seat uses his knees for the rear cover of the front seat 5. When a load is applied to the back cover board 8 by an action such as hitting the board 8, a gap may be formed at the mating portion between the back surface 71 of the seat back 7 and the back cover board 8. A simple way to eliminate this drawback without increasing costs is to change the material in the molding process of the back cover board 8 to increase its rigidity, but the one with increased rigidity lacks elasticity. However, the impact resistance deteriorates. The back cover board 9 of FIG. 5 is an improvement of the back cover board 8 of FIG. 4 in order to eliminate the above-mentioned drawbacks. In FIG. 5, the back cover board 9 has a skin material 92 adhered to a polypropylene base material 91. The skin material 92 is made by adhering a skin 92b to a foamed body 92a made of polyurethane. In this case, since the thickness T ₂ of the base material 91 is larger than the thickness T ₁ of the base material 81 shown in FIG. 4, the rigidity of the base material 91 becomes stronger than the rigidity of the base material 81. ing.

[0003]

[Problems to be solved by the device]

However, in the above-mentioned conventional example, by increasing the thickness T ₂ of the base material 91, the weight of the base material 91 is increased, and the back cover board 9 is stamped molded (hereinafter referred to as SPM molding). Since it is necessary to increase the pressing force at the time of performing, there is a problem that the skin material 92 is whitened and the hair is collapsed. Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to provide a seat back provided with a back cover board which has sufficient rigidity and does not cause whitening of the skin material or hair fall during SPM molding.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the structure of the present invention is a seat back that supports the back of a seated occupant. It is to have a structure in which materials and skin materials are sequentially laminated and laminated.

[0005]

[Action]

 In the seat back configured as described above, the triaxial restraint reinforcing material provides sufficient rigidity, and the stretch of the thermoplastic synthetic resin substrate and skin material is restricted by the triaxial restraint reinforcing material during SPM molding. It is possible to prevent whitening of the skin material and hair fall.

[0006]

【Example】

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a seat to which the seat back of this embodiment is applied, and FIG. 2 shows a sectional structure of a back cover board mounted on the seat back. 1 and 2, the seat 1 is composed of a seat cushion 2 and a seat back 3. The seat back 3 supports the back of a seated person who is seated on the seat 1, and a back cover board 4 of a size occupying most of the back surface 31 is fixed to the back surface 31 thereof by hooks, screws or the like not shown. ing. The back cover board 4 is obtained by sequentially stacking and adhering a polypropylene base material 41, vinylon triaxial restraint cloth 42, and a skin material 43, and further adhering to SPM molding. In this case, the bonding method may be an adhesive material or thermocompression bonding. The polypropylene base material 41 is a plate having a thickness T ₁ (see FIG. 4) and determines the shape of the back cover board 4. Since the vinylon triaxial restraint gauze 42 is restrained in the longitudinal, lateral and bias directions due to the triaxial restraint, there is no elongation in these directions. Further, since the vinylon triaxial restraint gauze 42 has good cold resistance, it has good impact resistance even at low temperatures. The skin material 43 is obtained by adhering the skin 43b to the polypropylene foam 43a by the same method as the above-mentioned adhesion.

In the present embodiment, the back cover board 4 is reinforced by the vinylon triaxial restraint cloth 42 so that the back cover board 4 has sufficient rigidity. Also in this case, since the thickness T ₁ of the polypropylene base material 41 is the same as the thickness T ₁ of the conventional example of polyps propylene-made base material 81 described above, since the pressure during the SPM molding requires Te small fence The skin material 43 does not whiten or fall over. Since the thickness T ₁ of the polypropylene base material 41 does not have to be a thick layer like the thickness T ₂ of the base material 91 in FIG. 5, the weight of the back cover board 4 is reduced because the weight is light. It is light and convenient. The use of the gauze 42 can be made lighter than the case where it is formed into a thick layer having a thickness T ₂ of the base material 91 of FIG. In the above-mentioned embodiment, the triaxial restraint gauze cloth was used for strengthening the base material, but the present invention is not limited to this. Restraint reinforcements can be used.

[0008]

[Effect of device]

 As described in detail above, according to the seat back of the present invention, the rigidity of the back cover board can be made sufficient without increasing the weight. Further, according to the present invention, it is possible to prevent whitening of the surface of the back cover board and hair fall during SPM molding.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of the back cover board shown in FIG.

FIG. 3 is a perspective view of a conventional example.

4 is a cross-sectional view of the back cover board shown in FIG. 3 taken along the line BB.

FIG. 5 is a cross-sectional view showing another conventional example of a back cover board.

[Explanation of symbols]

 1 seat 3 seat back 31 back of seat back 4 back cover board 41 base material 42 triaxial restraint cold gauze 43 skin material

Claims (1)

[Scope of utility model registration request] 1. A seat back for supporting a seat back of a seat occupant, wherein a back cover board for covering a back surface of the seat back comprises a base material of thermoplastic synthetic resin and a woven fabric having restraint properties in three axial directions. A seat back having a structure in which a shaft restraint reinforcing material and a skin material are sequentially laminated and laminated.