JPH0449959Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat frame for a vehicle seat or the like, which is constructed by joining a sheet metal frame and a pipe frame.

[Conventional technology]

Conventionally, a seat cushion 1c as shown in FIG.
Main seat seat back 1b ₁ and auxiliary seat 1
As a seat frame ₂ used for a bench seat 1 of a split bag equipped with a seat frame 2, there is a seat frame 2 constructed as shown in FIG.

This seat frame 2 is constructed by spanning pipe frames 5 and 6 between the front and back of sheet metal frames 3 and 4 on both sides and joining them by welding, and seat backs 1b ₁ are attached to the rear sides of both sheet metal frames 3 and 4. , 1b ₂ are attached, and free hinge brackets 7 ₁ and 7 ₂ of both seat bags 1b ₁ and 1b ₂ are fixed to the center of the rear pipe frame 6.

In this way, the free hinge brackets 7 ₁ and 7 ₂ are fixed to the rear pipe frame 6, and since the torsional and bending loads are applied to the rear pipe frame 6 in alternating forward and reverse directions from both seat bags 1b ₁ and 1b ₂ , the rear pipe frame 6 is attached to the sheet metal frame 3. , 4, and for this reason, in the past, as shown in FIGS. It was formed along the quarter surface and welded into one piece at this section.

In addition, in the seat frame 2, slide rails 8 and 9 of seat adjusters are attached to the lower surfaces of both the sheet metal frames 3 and 4.

[The problem that the idea aims to solve]

However, as described above, the joint between the sheet metal frames 3 and 4 on both sides of the seat frame 2 and the rear pipe frame 6 is the joint of a quarter of the circumference of the pipe frame 6, that is, a range of 1/4 However, it cannot support the force exerted by the load from the seat bag mentioned above,
In particular, fatigue failure due to repeated stress was likely to occur, and there was a risk that product functionality would be impaired.

The present invention was developed in view of these problems, and aims to provide a seat frame in which a pipe frame is joined to a sheet metal frame in such a way that it can support forward and reverse alternating loads under the best conditions. .

[Means to solve the problem]

To achieve the above object, the present invention provides a seat frame for a vehicle seat, etc., which is constructed by joining a sheet metal frame and a pipe frame, and a bracket is fixed to the part of the sheet metal frame where the pipe frame is joined. The pipe frame is diametrically sandwiched and welded between the end of the bracket and the abutting portion on the sheet metal frame that faces the end.

[Effect]

In the seat of the present invention, the pipe frame is diametrically sandwiched and welded to the sheet metal frame by the end of the bracket and the abutting part on the sheet metal frame side facing this end, that is, the pipe frame is welded to the sheet metal frame even if the circumferential surface is small. Due to the two-quadrant welding, the joint between the sheet metal frame and the pipe frame experiences approximately equal stress in both directions in response to the forward and reverse alternating torsional loads applied to the pipe frame. Since the frame, pipe frame, and bracket form a closed cross section, the strength against external pressure is increased, and the torsion and bending torque acting on the pipe frame can be sufficiently supported.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. The seat frame of this embodiment is also used for a bench seat of a split bag.

In FIG. 1, reference numeral 11 indicates the entire seat frame as an example, reference numerals 12 and 13 indicate side sheet metal frames,
14 and 15 are front and rear pipe frames.

The present invention is applied to the joint between one side sheet metal frame 12 and the rear pipe frame 15.

That is, the bottom surface of the rear end of one side sheet metal frame 12 is raised rearward in a cut-and-raised shape, and the abutment part 1
A bracket 17 having a flat bottom surface is provided on the lower surface side of this abutting portion 16.
the rear surface 17a of this bracket 17.
The upper end portion _17a1 is brought into contact with the rear peripheral surface of the rear pipe frame 15 so as to face the tip end portion 16a of the abutting portion 16 in the diametrical direction, and is fixed by welding. In this way, the rear pipe frame 1
By fixing the abutting portion 16 of the side sheet metal frame 12 and the ends 16a and _17a1 of the bracket 17 to the rear pipe frame 15, the joint portion of the rear pipe frame 15 to the side sheet metal frame 12 forms a closed cross section.

Note that the rear pipe frame 15 is also fixed to the joint surface 12a of the side sheet metal frame 12 by welding as in the conventional example.

Further, a nut 18 for attaching one slide race 8 of the seat adjuster is fixed to the bottom surface of the bracket 17, and the upper rail 8a of one slide rail 8 is attached to the seat frame 11, that is, the side metal frame via the bracket 17. It is attached to 12.

In the illustrated example, since no bracket is fixed to the other side sheet metal frame 13, the other slide rail 9 is directly attached. In addition, a free hinge bracket 7 is provided at the center of the rear pipe frame 15 as in the conventional example.
₁ , 7 ₂ are fixed.

Seat frame 1 of this example configured in this way
1, the rear pipe frame 15 is welded and joined to the side sheet metal frame 12 by the abutment part 16 and the bracket 17 in two opposing quadrants, so there are free hinge brackets 7 ₁ , 7 from the seat back to this joint part. Approximately equal stress is generated in both the forward and reverse directions in response to the forward and reverse alternating torsional loads applied through the joint ₂ , and the joint portion forms a closed cross section with the abutting portion 16 of the side sheet metal frame 12, the pipe frame 15, and the bracket 17. Therefore, the strength against external pressure is high, and the torsion and bending torque acting on the pipe frame can be sufficiently supported.

In addition, in this example, the rear pipe frame 15
Since the load input from the seat back via the bracket 17 is directly transmitted to the slide rail 8 and received on the floor side, the load applied to the seat frame 11 is reduced.

In addition, in this example, the abutting portion 16 is formed only on one side sheet metal frame 12, and the bracket 17 is
However, the other side sheet metal frame 13 may also have a similar structure, and in this case, the rear pipe frame 15 can be supported even more robustly and reliably.

Next, FIG. 4 shows another embodiment of the present invention, in which the bracket is fixed to the top side of the bottom surface of the side sheet metal frame.

That is, in the case of this example, a rising abutment part 26 is formed on the rear surface of the side sheet metal frame 12, and an end 26a of this abutment part 26 is attached to the rear pipe frame 12.
A bracket 27 is fixed to the upper surface of the bottom surface in front of the abutting part 26, and this tip 27a is attached to the front peripheral surface of the rear pipe frame 15. The end portion 26a of the abutting portion 26 is brought into contact with the end portion 26a in a diametrical direction and fixed by welding.

In the case of this example configured in this manner, the joint between the side sheet metal frame 12 and the rear pipe frame 15 is formed into a closed cross section, and the rear pipe frame 15 is welded in two opposing quadrants, similar to the above-described example. The same effect as described above can be obtained.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can be modified in various ways without departing from the spirit of the present invention.

[Effect of idea]

As described above, according to the present invention, in a seat frame such as a vehicle seat constructed by joining a sheet metal frame and a pipe frame, a bracket is fixed to the sheet metal frame, and the pipe frame is attached to the sheet metal frame. Since the end part and the abutting part on the sheet metal frame side facing this end part are sandwiched and welded in the diametrical direction, this joint part has almost no resistance in both the forward and reverse directions against the forward and reverse alternating torsional loads applied to the pipe frame. Stress is generated equally, and the joint forms a closed cross section, which increases the strength against external pressure, and the joint can sufficiently support the torsion and bending torque acting on the pipe frame, preventing fatigue failure. The service life is extended.

Further, the seat frame is designed to prevent fatigue failure without making any major structural changes, so it is advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of the seat frame according to the present invention, Fig. 2 is a perspective view of the main part of the same, Fig. 3 is a cross-sectional view of the main part of the same, and Fig. 4 is a cross-section of the main part of another example. Figure 5 is a perspective view of an example of a bench seat, and Figure 6 is a perspective view of an example of a bench seat.
The figure is a perspective view of a conventional seat frame, FIG. 7 is a perspective view of the joint of the same seat frame, and FIG.
FIG. 3 is a cross-sectional view of a joint. In the figure, 11 is a seat frame, 12 is a side sheet metal frame, 15 is a rear pipe frame, 16,
26 is an abutting portion, and 17 and 27 are brackets.

Claims (1)

[Scope of Claim for Utility Model Registration] A seat frame for a vehicle seat or the like constructed by joining a sheet metal frame and a pipe frame, wherein a bracket is fixed to the part of the sheet metal frame where the pipe frame is joined, A seat frame for a vehicle seat or the like, characterized in that the pipe frame is sandwiched and welded in the diametrical direction by an end of the bracket and an abutting part on the sheet metal frame side facing the end.