JPH0527890Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improvements in seat frames used for assembling automobile seats.

BACKGROUND TECHNOLOGY In general, in automobile seats, as shown in Fig. 6, an outer frame _F1 and an inner frame _F2 are overlapped, and a plurality of locking holes A, A... are provided at the end portions on the outer peripheral side. One end side S ₁ of the spring S is latched to the latching holes A, A..., and cushion springs C, C... are attached to the other end side S ₂ via the retaining frame B. is used.

Conventionally, in this seat frame, punch holes D _{1 ,} D _{2 .} . . are provided at the outer peripheral end of the outer frame F ₁ as shown in FIG _. , D ₂ ... are formed into cylindrical projections E ₁ , E ₂ ... corresponding to the holes D _{1 ,} D ₂ ..., as shown in FIG. 7b _. It is usual that holes A, A, etc. for springs C, C, etc. are provided by fitting the springs C, C, and so on.

Problem to be solved by the invention However, in this seat frame, the latching holes A and A are
... are formed from only one cylindrical wall of the cylindrical protrusions E ₁ , E ₂ ... provided on the inner frame F ₂ , so their strength is low and a large load is applied to the terminal portion S ₁ of the spring S. There is a risk that it may be easily deformed. In addition, punch holes D ₁ , D ₂ ... and cylindrical protrusions E ₁ ,
E ₂ ... is formed by processing the outer frame F ₁ and the inner frame F ₂ in separate steps, and they must be fitted together at the same time, so the distance between the punched holes D ₁ , D ₂ ... is L ₁ , The distance l _{1 , l 2 ... between L 2 ... and the cylindrical protrusions E 1 , E 2 ... is finished} within accurate dimensional tolerances, and the inner diameter dimension X ₁ of the punched holes D ₁ , D ₂ ... The outer diameter dimensions Y ₁ , Y 2 of X ₂ ... and the cylindrical protrusions E ₁ , E _{2 ...} that are fitted into these need to be finished within precise dimensional tolerances, which increases the number of processing steps and increases the cost. It cannot be avoided.

In addition, the inner diameter dimensions of the punched holes D ₁ , D ₂ ..., X ₁ , X ₂ ...
… is the outer diameter dimension Y ₁ , Y ₂ of the cylindrical protrusion E ₁ , E ₂ …
By making the hole considerably larger than ......
It is possible to make it possible to fit D ₁ , D ₂ ... and the cylindrical protrusions E ₁ , E ₂ ... even if their relative positions are shifted, but this would reduce the strength of the outer frame F ₁ At the same time, the cylindrical walls of the cylindrical projections E ₁ , E _{2 .} . . cannot be supported by the side walls of the punch holes D ₁ , D ₂ .

An object of the present invention is to provide a high-strength and inexpensive seat frame by standing up a plurality of stacked thin plates and forming openings for latching.

Means for Solving the Problems In the seat frame according to the present invention, each end side of a plurality of frame members formed of thin plates are overlapped, at least one end thereof is bent and hemmed, and this joining It is constructed by forming apertures in each thin plate by standing up and molding them, and hooking the ends of the springs.

Function: In this seat frame, the end of the spring is latched to the opening formed by standing up multiple thin plates at the hemming joint, so the end of the spring is latched to the latching hole formed from one thin plate. In addition to being superior in terms of strength, it can be manufactured at low cost without requiring a lot of man-hours because the openings are formed by overlapping multiple thin plates and forming them up using a press or the like.

Embodiments The following description will be made with reference to FIGS. 1 to 6.

As shown in Fig. 1a, this seat frame consists of an outer frame 1 and an inner frame 2 formed of thin metal plates, each end of which is superimposed vertically, and the end 2a of the inner frame 2 is placed over the end of the outer frame 1. It is assembled as a pan frame by protruding from the terminal 1a, bending toward the outer frame 1, and joining by hemiing. This seat frame has joints shown in Figure 1b.
As shown in FIG. 1, the thin plates 1a, 2a, and 2b are formed at the same time, thereby forming the end side _S1 of the spring S.
Apertures 3, 3, . . . for hanging are provided. The openings 3, 3, . . . can be easily formed by making a pilot hole in the joint portion in advance and expanding it with a punch, or by piercing it with a punch having a tapered cutting edge.

In the seat frame constructed in this way, the cylindrical wall of the openings 3, 3... is formed by three thin plates 1a, 2a, 2.
b are formed by overlapping them to improve strength, and these openings 3, 3... are formed by overlapping the end sides of the outer frame 1 and the inner frame 2 and simultaneously raising and molding them. It does not require many man-hours, and it can be manufactured at low cost since it is not necessary to finish the mutual spacing of the openings 3, 3, etc. with great precision.

Furthermore, if silencers 5, 5, etc., molded from a relatively soft material such as resin or rubber, as shown in _FIG . It is possible to prevent the squeaking sound generated by the sliding contact between the openings 3, 3, . . . and the cylindrical wall.

In addition, in the above-mentioned embodiment, the hemiing joint is made of three layers, and this joint is raised up and the openings 3 and 3 are stacked.
As shown in Figure 3a, the hemming joint was formed by forming four thin plates 1'a, 1'b, 2'a,
2'b are stacked one on top of the other, and these four thin plates 1'a, 1'b, 2'a, 2'b are simultaneously raised and formed to form holes 3, 3... or as shown in Fig. 4. The opening 3'' shown in FIG. 4b may be formed by simultaneously raising and forming two thin plates 1''a and 2''b as shown in FIG. 4b.

The above-mentioned openings 3, 3', and 3'' of the frame are effective for latching the spring S having the hook-shaped terminal portion _S1 , and the substantially linear terminal portion as shown by section G in FIG. 5, a retainer 6 made of two thin plates formed by cutting out a part of the outer frame 1 and the inner frame 2 and forming them upright into an inverted L shape is provided, and A bead portion 6 is attached to a part of this retainer 6.
By providing protruding portions a, 6b, . . . , a highly rigid hooking portion can be easily manufactured.

Effects of the Invention As described above, according to the automobile seat frame according to the present invention, sufficient rigidity can be imparted to the locking hole of the cushion spring, and a frame with excellent strength and low cost can be provided. .

[Brief explanation of drawings]

Figures 1a and 1b are side sectional views showing the order in which openings are formed on the terminal side of an automobile seat frame according to the present invention, and Figure 2 shows a state in which a silencer is attached to the opening on the terminal side. Explanatory drawings, FIGS. 3a and 3b are side sectional views illustrating the order in which holes are formed using four thin plates in another embodiment of the same frame, and FIGS. 4a and 4b are
b is a side sectional view illustrating the order in which holes are formed using two thin plates in another embodiment of the same frame;
The figure is a perspective view of a retainer for latching a spring whose terminal part is substantially linear, and is a diagram for explaining part G in FIG. 6.
FIG. 6 is an overall perspective view of a generally related automobile seat frame, and FIGS. 7a and 7b are explanatory diagrams showing the order in which hooking holes are formed on the end side of a conventional seat frame. 1...Outer frame, 2...Inner frame, 1a, 2a, 2b, 1'a, 1'b, 2'a,
2'b, 1''a, 2''b... thin plate, 3, 3', 3''...
...opening hole, S...spring, S ₁ ...end.

Claims (1)

[Scope of utility model registration request] A plurality of frame members 1 and 2 formed from thin plates
The terminal sides of the two are overlapped, at least one of the terminals is bent and hemmed together, and each of the thin plates 1a, 2a, 2b, 1'a, 1'
b, 2'a, 2'b, 1"a, 2"b are vertically molded to form openings 3, 3', 3" on the end side of the spring S.
A seat frame characterized by hanging S ₁ .