JP2000023777A - Seat back structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat back structure which enables enduring of an excessive load and moreover, gets attentions paid to the environmental and recycling aspects. SOLUTION: A seat back frame 6 mad of a metal is formed as the backbone of a seat back and supported on a seat cushion or on the body of an automobile while the metal seat back frame 6 is built in a hollow resin molded shell 7 formed almost following the shape of the seat back by a blow molding with a part thereof 6 supported on frame support parts 10 and 11 formed on the resin molded shell 7. Moreover, a seat cover concurrently serving as a seat pad is detachably mounted on the front side of the resin molded shell 7 to cover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a seat back structure used for an automobile seat.

[0002]

2. Description of the Related Art In general, an automobile seat, for example, a front seat, as shown in FIG. 4, is mounted on a seat cushion 1 for supporting an occupant's buttocks and a rear end of the seat cushion 1 so as to be reclined. The main part is constituted by the seat back 2 supporting the occupant's back.

Conventionally, as shown in FIGS. 4 and 5, the above-mentioned seat back 2 is formed by press molding using a synthetic resin such as PP resin containing glass fiber in order to reduce the weight and cost of the seat. Is known in which a seat back frame 3 formed in the general shape described above is covered with a seat pad 4 made of urethane foam or the like and a seat cover 5 made of vinyl chloride or the like.

[0004]

By the way, in the above-mentioned seat back structure, the load applied to the seat back 2 is entirely received by the resin seat back frame 3, and the seat back frame 3 has recently been improved with collision safety. The required strength has increased to about 3000 N · m (moment around the rotating hinge), which is more than double the conventional strength. for that reason,
In order to improve the strength of the conventional seat pad frame 3 made of resin, it is necessary to increase the thickness of the synthetic resin. In this case, the weight is increased and the cost is increased. However, the merit of the cost reduction is lost.

[0005] In the case of the rear seat, a resin seat back frame is formed by blow molding. However, when the load applied to the seat back increases, it cannot be withstand unless the thickness of the resin is increased.

As described above, in the conventional seat back structure, there is a limit in strength of the seat back frame, and it has been difficult to meet future safety needs.

Accordingly, the present invention has been developed in view of the above-described circumstances, and an object of the present invention is to provide an automobile seat back structure that can withstand an excessive load and that is environmentally friendly and recyclable. Aim.

[0008]

As a technical means for achieving the above object, the present invention forms a metal seat back frame which forms a skeleton of a seat back, and attaches the metal seat back frame to the seat. While supporting the cushion or the vehicle body of the automobile, the metal seat back frame is formed into a hollow resin molded shell formed into the approximate shape of the seat back by blow molding, and a part of the seat back frame is formed into the resin molded shell. It is characterized by being built in while being supported by a frame supporting portion formed in.

Further, the present invention is characterized in that a seat cover also serving as a seat pad is detachably attached and covered on the front side of the resin molded shell.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat back structure according to the present invention will be described below in detail with reference to FIGS.

FIGS. 1 to 3 show an embodiment of the present invention. In this embodiment, an aspect of a front seat of an automobile is shown.

As shown in FIGS. 1 to 3, a metal seat back frame 6 forming a skeleton of a seat back, a resin molded shell 7 containing the metal seat back frame 6, and a resin molded shell 7 And a seat cover 8 (shown only in FIG. 2) which is covered on the front side.

The metal seat back frame 6 is composed of side frames 9 and 9 made of a metal plate formed by bending right and left edges of the front and rear sides, which are erected on the left and right sides, at substantially right angles, and the left and right side frames 9 and 9. An upper frame 10 made of a round pipe curved into a U-shape fixed between upper ends,
And a lower frame 11 formed of a round pipe fixed between the lower portions of the left and right side frames 9, 9. The upper ends of the side frames 9, 9 are formed so as to surround the curved ends of the upper frame 10, and both of them are formed. It is formed by welding the overlap portion and welding both ends of the lower frame 11 to the lower inner sides of the left and right side frames 9, 9.

The resin-molded shell 7 is formed in a hollow shape by a blow molding using a synthetic resin such as PP, and has a rough shape of a seat back. This is performed by setting a metal seat back frame 6 in a mold in advance and performing blow molding. In the resin molded shell 7, a frame supporting portion 12 is integrally formed at an appropriate position during blow molding, and the upper frame 10 and the lower frame 11 of the metal seat back frame 6 are supported by the frame supporting portion 12. I have. After blow molding, the resin molded shell 7 cuts off the lower end portions of both sides shown by two-dotted lines in FIG. It is designed to be reclineably attached to the rear end of the seat cushion.

The seat cover 8 is a cushion body which also serves as a seat pad made of urethane foam or the like, and is detachably attached to the front surface of the resin molded shell 7 through a simple attaching / detaching means (not shown) such as a magic fastener. Is done.

According to the seat back structure having the above-described structure, the load applied to the seat back is received by the metal seat back frame 6 built in the resin molded shell 7, and therefore, it can sufficiently withstand an excessive load. It is possible.

Further, since the resin molded shell 7 containing the metal seat back frame 6 is formed in a hollow shape by blow molding, the resin molded shell 7 has cushioning performance. Further, since the resin molded shell 7 is rotatably supported by only the upper frame 10 and the lower frame 11 formed of round pipes in the metal seat back frame 6, the resin molded shell 7 is more easily bent between the upper and lower supporting portions, and Performance is improved. Therefore, while urethane foam usage is drastically reduced, shredder dust is reduced and
The need for a seat cover made of vinyl chloride or the like is not required, and the problem of harmful gases such as dioxin can be solved.

Since the seat cover is detachably mounted on the front side of the resin molded shell 7 through a simple attaching / detaching means such as a magic fastener, the seat cover 7 can be easily replaced.

Further, since the resin molded shell 7 containing the metal seat back frame 6 is formed in a hollow shape by blow molding, it is possible to form a concave portion on the back side of the resin molded shell 7. The recess can be effectively used for a cup holder or the like.

Although the above embodiment has been described with respect to the aspect of the front seat of the automobile, the present invention is also applicable to the aspect of the rear seat of the automobile.

[0021]

As described above, according to the present invention,
A metal seat back frame is built in a hollow resin molded shell formed roughly in the shape of a seat back, and a seat pad that also serves as a seat cover is detachably attached and covered on the front side of the resin molded product. As a result, the load applied to the seat back is received by the metal seat back frame, and it is possible to sufficiently withstand an excessive load, and it is easy to replace the seat cover with a favorite one, which has not existed in the past. A novel seat design is possible, and a problem of reducing shredder dust and harmful gases such as dioxin can be solved to provide a seatback structure that takes care of the environment and recycling.

[Brief description of the drawings]

FIG. 1 is a partially sectional perspective view of a resin molded shell showing an embodiment of a seat back structure of the present invention.

FIG. 2 is an explanatory cross-sectional view showing an embodiment of the seat back structure of the present invention.

FIG. 3 is an explanatory longitudinal sectional view showing an embodiment of the seat back structure of the present invention.

FIG. 4 is a perspective view showing a conventional seat back structure.

FIG. 5 is an explanatory cross-sectional view showing a conventional seat back structure.

[Explanation of symbols]

 6 Metal seat back frame 7 Resin molded shell 8 Cover pad 9 Side frame 10 Upper frame 11 Lower frame 12 Frame support

Claims (2)

[Claims] 1. A metal seat back frame which forms a skeleton of a seat back is formed. The metal seat back frame is supported on a seat cushion or a vehicle body of an automobile.
An automobile characterized in that a part of a seat back frame is built in a hollow resin molded shell formed into a schematic shape of a seat back by blow molding while being supported by a frame supporting portion formed in the resin molded shell. Seat back structure. 2. The vehicle seat back structure according to claim 1, wherein a seat cover serving also as a seat pad is detachably attached and covered on a front side of the resin molded shell.