JPH0840122A - Seat for vehicle - Google Patents

Abstract

PURPOSE:To embody a seat for a vehicle simplifying structure of a cushion frame of a reclining seat and improving the assembly workability favourable. CONSTITUTION:A seat for a vehicle placing and fixing a cushion frame 3 on it through a reinforcement 1 provided on a rotating board and free to recline a back frame 4 is structured to fix and support an arm 5 for reclining connected to the back frame 4 on the reinforcement 1 and to transmit a load of an occupant working on the back frame 4 to the reinforcement 1. Additionally, the cushion frame 3 is constituted of a panel material, and the cushion frame 3 is placed on the reinforcement 1 and bolt fastened and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, in particular, a rotating seat having a reclining seat back.

[0002]

2. Description of the Related Art A typical example of this type of sheet is shown in FIG.
On the pair of seat legs 8 arranged on the vehicle floor,
A guide rail 7 is provided, on which a turntable 2 is mounted. The turntable 2 is a ring-shaped turn lower 2a.
And a turn upper 2b slidable along the inner surface of the turn upper 2b. The reinforcement 1 extending in the vehicle width direction is fixedly mounted on the turn upper 2b. A cushion frame 3A is placed and fixed on it.
The cushion frame 3A includes upper and lower two-stage pipe frames 31 and 32 forming an outer circumference and has a structure in which a cushion spring S is stretched, and lower arms 5'for reclining are provided at rear portions of both side surfaces thereof. The cushion frame 3A is bolted and fixed to the reinforcement 1 via a plurality of brackets 11 welded to the rear end of the reinforcement 1. On the other hand, the back frame 4A has a structure in which a cushion frame S is stretched over a pipe frame 41 'that forms the outer periphery, and upper and lower reclining arms 6 are provided at the left and right lower ends of the pipe frame 41', and the lower end thereof is the lower arm. 5'is pivotally supported by a support shaft. An unillustrated reclining mechanism for tilting the back frame 4A and holding the back frame 4A at a predetermined tilting position is provided at a connecting portion between the arms 5 ′ and 6, and the reclining mechanism 52 is covered with a reclining cover 52. The cushion frame 3A,
The back frame 4A and the back frame 4A are covered with a cushion material and a skin material (not shown), respectively.

[0003]

Since the back frame 4A receives passengers due to sudden acceleration and deceleration of the vehicle, a considerable load is applied. Since this load is input to the cushion frame 3A via the reclining upper arm 6 and the lower arm 5 ', a twisting force acts on the cushion frame 3A. Therefore, the cushion frame 3A
Is a pipe frame with high strength that can withstand the weight of passengers and the load from the back frame 4A, which is problematic in terms of productivity and cost. Further, since the cushion frame 3A made of a pipe material is difficult to be directly joined to the reinforcement 1, a bracket 11 which is extended at the rear end of the reinforcement 1 is provided and bolted and fixed to this, so that the assembling workability is improved. There's a problem.

Therefore, an object of the present invention is to provide a vehicle seat in which the structure of the cushion frame is simplified and the assembling workability is improved.

[0005]

According to the present invention, as shown in FIG. 1, a cushion frame 3 can be placed and fixed on a reinforcement 1 extending in the vehicle width direction provided on a turntable 2 and a back frame 4 can be reclined. In the vehicle seat described above, the left and right lower ends of the back frame 4 are tiltably connected to the left and right ends of the reinforcement 1 by a reclining arm 5. Further, the cushion frame 3 is made of a panel material, and the cushion frame 3 is bolted and fixed to the reinforcement 1.

[0006]

By connecting the left and right lower ends of the back frame 4 to the left and right ends of the reinforcement 1 provided on the turntable 2, the load applied to the back frame 4 is not input to the cushion frame 3 and the reinforcement is strong. Ment 1 is transmitted. Therefore, since the cushion frame 3 does not require high strength as in the conventional case, the cushion frame 3 can be formed of a panel material having high productivity. By forming the cushion frame 3 with a panel material, the cushion frame 3 can be directly overlapped with the reinforcement 1 and bolted and fixed without using a bracket or the like.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a two-seater rotating seat to which the present invention is applied will be described with reference to FIGS. As shown in FIG. 1, guide rails 7 are provided on two parallel seat legs 8 provided on the vehicle floor, and a turntable 2 is placed on the guide rails 7. The guide rail 7 is
The turntable 2 is composed of a lower rail and an upper rail that slides along the lower rail. The turntable 2 has a ring-shaped turn lower 2a and a turn upper 2b slidable along the inner surface thereof.
The turn lower 2a is fixed to the upper rail of the guide rail 7 while the turn lower 2a is
The reinforcement 1 is placed and fixed on b.

As shown in FIG. 2A, the reinforcement 1 has a strip shape extending in the vehicle width direction.
As shown in (B), the reinforcement upper part 1b is welded to the front and rear upper end flanges of the reinforcement lower 1a to form a closed cross-section structure. Further, as shown in FIG. 2C, the left and right ends of the reinforcement 1 have a strong structure in which the rising end face of the reinforcement lower 1a and the inclined end of the reinforcement upper 1b are welded.

As shown in FIG. 1, a reclining arm 5 that supports the left and right lower ends of the back frame 4 has its lower ends bolted to the left and right end surfaces of the reinforcement 1. On the outside of the arm 5, a ratchet (not shown) is rotatably supported. An elongated hole 51 is formed in the upper end of the arm 5 with the shaft fulcrum as the center.
The upper end of the arm 5 and the lower end of the outer frame 41 of the back frame 4 made of a pipe material are connected by a rivet that sandwiches the arm 5 and penetrates the elongated hole 51.
The back frame 4 can be tilted about a support shaft of the ratchet, and the back frame 4 can be tilted at a predetermined tilt angle by rotating the ratchet by a known reclining mechanism. 52 is a cover member.

The reclining arm is composed of a lower arm and an upper arm, the lower arm is fixed to the reinforcement 1 and the upper arm is fixed to the back frame 4, and both arms are axially rotatably connected to each other. Good.

The cushion frame 3 is formed by press-molding a panel material. As shown in FIG. 2D, the cushion frame 3 is overlapped with the reinforcement upper 1b and bolted at a plurality of positions. In the illustrated example, the service hole 10 is formed in the reinforcement lower 1a, so that bolting can be performed with good workability. The reinforcement 1 and the cushion frame 3 are coupled to each other by the reinforcement lower 1a and the reinforcement upper 1b.
Various means may be taken, such as bolting the cushion frame 3 to the flange welds at the front and rear ends of the.

Further, a bracket 21 is provided above the front end of the rotary disk 2, and the front end of the cushion frame 3 is bolted to the bracket 21. The cushion frame 3 and the back frame 4 are covered with a cushion material and a skin material (not shown) to form a vehicle seat.

The present invention can also be applied to a reclining type rotating seat for one person. As shown in FIG. 3, a reinforcement upper portion 1b is provided only on both left and right ends of the reinforcement 1A to form a closed cross section, and both ends of the reinforcement upper portion 1b are overlapped and welded to the left and right standing end surfaces of the reinforcement lower portion 1a. The lower end of the reclining arm is bolted to the end face.

[0014]

As the reclining arms are directly connected to the left and right ends of the reinforcement for supporting the cushion frame provided on the turntable, the load applied to the back frame is directly transmitted to the reinforcement having high strength. Do not enter in. Therefore, the cushion frame can be formed of a panel material having high productivity in place of the conventional high-strength pipe material, and the structure of the cushion frame is simplified. And by forming the cushion frame with panel material,
The cushion frame can be superposed on the reinforcement and directly bolted and fixed without using a bracket or the like, which improves the workability of assembling the back frame.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a vehicle seat to which the present invention is applied.

2 (A) is a perspective view of a reinforcement for a two-seat seat used in the present invention, and FIG. 2 (B) is FIG.
FIG. 2C is a sectional view taken along line IIB-IIB in FIG.
2A is a cross-sectional view taken along line IIC-IIC in FIG.
It is a seat cushion attachment state sectional drawing which follows the IID-IID line of (A).

FIG. 3 (A) is a perspective view of a reinforcement for a one-person seat used in the present invention, and FIG. 3 (B) is FIG.
It is sectional drawing which follows the IIIB-IIIB line of (A).

FIG. 4 is an exploded perspective view of a conventional vehicle seat.

[Explanation of symbols]

 1,1A Reinforcement 2 Turntable 3 Cushion frame 4 Back frame 5 Reclining arm 5'Lower arm 6 Upper arm 7 Guide rail 8 Seat leg

Claims (2)

[Claims] 1. A vehicle seat in which a cushion frame is mounted and fixed on a reinforcement extending in the vehicle width direction provided on a rotating disk, and a back frame can be reclined, wherein left and right lower ends of the back frame are connected to the reinforcement frame. A vehicle seat characterized in that it is tiltably connected to the left and right ends by reclining arms. 2. The vehicle seat according to claim 1, wherein the cushion frame is made of a panel material, and the cushion frame is placed on the reinforcement and fixed by bolts.