JPS62164413A - Seat frame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of a seat frame for an automobile.

2. Description of the Related Art An example of a conventional automobile seat frame is shown in FIGS. 9a to 9f. This is exemplified as a seat frame for the so-called front back, that is, the backrest portion of the front seat. As shown in FIGS. 9a, 9b, and 9c, the pipe 01 is bent to form a substantially square frame, and welded at the point indicated by y. On the side of this frame, there is a side platen 1-02 made by processing sheet metal.
．． 02A is bent round where it touches pipe 01 and welded (see Figure 9d). Figures 9e and 9f correspond to lines ■e and ■f in Figure 9a, respectively? A5 cross section is shown.

Further, an example of a conventional van-type seat frame is shown in FIGS. 10a to 10C. The bun 03 is formed by pressing an iron plate or the like, and the end of the bun 03 is formed into a flap as shown in the bun end 03A in FIG. 10b. Since this folded bun end 03A alone is weak, the pipe 01 is bent and formed and welded to the bun 03 for reinforcement. This knob 01 is butt-welded at the point indicated by y to form a frame.

Problems to be Solved by the Invention In the conventional seat frame illustrated in FIGS. 9a to 9f, the side platen (02.02A) is a pressed part made of iron plate, but the side platen (02.02A) is a pressed part made of iron plate. Part of the structure cannot be substituted,
It has a double structure made of separately bent pipes and welded together.

The same thing can be pointed out in the conventional examples shown in FIGS. 10a to 10c. In other words, simply folding the ends of the bun would not be strong enough, so the bun has a double structure made by pre-bent, forming and welding a separate pipe oi.

Therefore, in any of the conventional structures, a large bender or the like is required to bend the pipe, resulting in a large number of processing steps and high costs.

Means for Solving the Problems The present invention has been made to solve the above-mentioned drawbacks of the conventional seat frames. It is characterized by having been formed.

This eliminates the conventional pipe and allows the bracket or bun end to have the same function as the pipe, thereby solving the above-mentioned conventional drawbacks.

Embodiment FIGS. 13 to 11 show a front back seat frame according to a first embodiment of the present invention. In this example, rc-7C% Id-id in FIG. 1a, 1e-
1e, 1f-If cross-sections of Fig. 1C, Fig. 1d,
As is clear from FIGS. 1e and 1f, the side bracket 2.2A is formed from a sheet metal, that is, an iron plate, and at that time, the ends are curled to form a hollow tube shape to form the frame portion 20. It's important. This frame part 20
The upper pipe 1 is inserted into the upper part and welded. In the lower part, as shown in FIGS. 1h and 11, the lower pipe 3 is inserted into a pipe cover part 2a formed by cutting out the frame part 20 and welded. This is intended to increase the strength of the joint by increasing the area of the pipe cover 2a at the bent portion of the lower pipe 30.

According to such a configuration, the side brackets 2, 2A and the side frame portion 20 can be integrally formed by rolling at low cost, resulting in a durable and low cost seat frame.

It is also possible to form the double-wound frame portion 22 by curling the ends into a circular shape, as illustrated in FIG. 1e. In this case, as shown in FIGS. 2a and 2b, the inner length of the end 22a of the double-wound frame portion 22 is made longer than the outer length to form a spirally wound end. Good. By doing this,
Strength can be improved by avoiding sudden changes in the cross section. It should be noted that Figure 2b may be rolled up and attached at the same time as the developed view of the plate material before curling.

In addition, if the strength is insufficient just by wrapping, arc welding, spot welding, or punching to prevent removal shall be performed as necessary.

Further, the double winding shown in FIG. 1g may be a single winding or more, that is, an irregular number of windings exceeding a single winding, or a double winding or more.

In the second embodiment shown in FIGS. 3a to 3e, the ends of the side brackets 2C and 2D are rolled up into a hollow tube shape as in the first embodiment, and the side brackets 2C and 2D are rolled up into a hollow tube shape as shown in FIG. 3d. The upper and lower parts of the side frame part are formed by extending the parts 2Ca, 2Cb, 2Da, and 2Db (see Fig. 3C), which are rolled up into a hollow tube shape. The upper and lower frame parts are formed by folding the parts. These parts are y
Butt welding is performed where indicated by (see Figure 3e).

Note that this butt weld portion may have a fitting structure.

FIGS. 4a and 4b show upper and lower frame parts 11 which replace the upper and lower pipes 1.3 in the first embodiment shown in FIGS. 1a to 11. FIGS.

One side 11a of this frame part is formed by rolling the end of the iron plate forming the bottom plate 11C into a hollow tube shape to create a partial lid.
This bottom plate 11 is cut at a portion X, bent and spot welded to form an R portion. A similar piece llb was overlapped in part 2 and this was also spot welded to complete it.

This rolled-up end lie is plug-welded to the side frame shown in FIG. 1a, and the frame is assembled. The upper and lower frame parts have a wrap-around structure and are free-sized, and the flat part of the llc needs to be made separately and welded to the upper pipe 1 in Figure 1a or the pipe parts 2Da and 2Ca in Figure 3a. It is our special mission to be integrated.

Figures 5a and 5b are examples of seat frames of van construction. As shown in FIG. 5b, the edge portion of the bunch is rolled into a hollow tube to form a frame portion.

If it is difficult to wrap the corners of the seat frame of such a van structure, as shown in FIGS. 6a to 6c, the pipes 5 are overlapped at the corner by cutting a cut in the wrapping portion, and spot welding is performed. Combine with .

The structure of this corner may be as shown in FIG. This can be done at the same time by incorporating the pipe 5 when forming the winding part.

FIG. 8 shows an example in which a rotating hinge pin 6 is inserted in a corner.

Effect of the invention According to the present invention described above, the following effects can be achieved.

(1) Eliminates the drawbacks of conventional seat frames, that is, the dual structure of the pipe and steel plate, and by integrally molding the winding part at the end of the steel plate, it can also function as a pipe.

(11) The degree of multiplicity of the winding portion can be changed in whole or in part depending on the required strength.

(iii) Pipes can be partially used in necessary areas.

Furthermore, the thickness of the plate can be made thinner than that of conventional plates.

(1v) As a result of the above, the structure of the seat frame becomes simpler and lighter, reducing material costs and processing man-hours, eliminating the need for pipe processing and large-scale equipment, and significantly improving cost and quality.

Although the present invention has been described above in detail with reference to its preferred embodiment, the present invention is not limited to this specific embodiment, and it goes without saying that many changes and modifications can be made without departing from the spirit of the invention. be.

[Brief explanation of drawings]

Figure 1a is a plan view of the first embodiment of the present invention, Figure 1h is a side view thereof, Figure 1c is a 1c-(c sectional view of Figure 1a, Figure 1d is a ld-Jd sectional view, Figure 1e is Ie-
1a is a sectional view, FIG. 1f is a (f-1f sectional view), FIG. Figure li
Fig. 2a is a plan view of the end of the multiple winding frame portion, Fig. 2b is a developed view thereof, Fig. 3a is a plan view of the second embodiment of the present invention, and Fig. 3b is a side view thereof. , 3rd C
The figure is an enlarged sectional view of 1ie-11c in Fig. 3a, Fig. 3d is an enlarged sectional view of [1d-[[d], and Fig. 3e is an enlarged sectional view of l[e-1ie
FIG. 4a is a plan view of the upper and lower frame parts used in place of the pipe in the embodiment shown in FIG. 1a, FIG. A plan view of the third embodiment, FIG. 5b is an enlarged cross-sectional view taken along the line VB-VB,
Fig. 6a is a partial plan view of a modified example of the embodiment shown in Fig. 5a, Fig. 6b is an enlarged sectional view taken along the line ■b-■b, and Fig. 6c is a partial plan view of a modification of the embodiment shown in Fig. 5a.
c-■c enlarged sectional view, FIG. 7 is a partial plan view of a modified example, and FIG. 8 is a sectional view showing the installation of a rotating hinge pin;
9a to 9f are plan, side and sectional views of the first conventional example, and FIGS. 10a to 10c are plan and sectional views of the second conventional example. 1... Upper pipe, 2, 2A... Side bracket, 2a
...Pipe cover part, 20..Frame part, 22..Double winding frame part, 22a..End part, 3..Lower pipe, 11..Upper and lower frame part, 11C..Bottom plate, 1
1d...Involved part, lie...Figure 2αFigure 3aFigure 4αFigure 5aFigure 7Figure 9aFigure 70.0Figure 10c

Claims (1)

[Scope of Claims] 1. A seat frame characterized in that the frame is formed by rolling the ends of a plate-shaped bracket or bun into a hollow tube shape by roll forming. 2. In the seat frame according to claim 1, the side bracket and the side frame portion are formed by rolling the ends of a single plate into a hollow tube shape, A seat frame characterized in that the pipe forming the end frame portion is inserted into the formed side frame portion. 3. The seat frame according to claim 1, wherein the end portion of the hollow tubular shape is wound in one or more layers. 4. The seat frame according to claim 2, wherein the end portion rolled into a hollow tubular shape has a single wrap or more, and has a tube end shape whose length gradually becomes shorter from the inside to the outside. seat frame. 5. In the seat frame according to claim 1, the end portions that are rolled up into a hollow tube shape are long, and the end portions are bent to form end frame portions, and the end frame portions formed in this way are viewed from both sides. A seat frame characterized by being completed by welding. 6. In the seat frame described in claim 1, the side bracket and the side frame portion are formed by rolling the ends of one plate into a hollow tube shape, and the separately prepared van portion and The frame part is completed by inserting an end frame part formed by rolling the end of a single plate material into a hollow tube shape and inserting it into the side frame part formed by rolling the end part of a single plate material into a hollow tube shape. seat frame. 7. The seat frame according to claim 1, characterized in that the end of one plate forming the bun is rolled into a hollow tube shape to form the frame portion. 8. The seat frame according to claim 7, characterized in that the frame is completed by inserting pre-bent pipes into the corners. 9. The seat frame according to claim 7, characterized in that rotation hinge pins are provided at the corners.