JPS6332511Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to the structure of a seat back hinge portion of an automobile.

(b) Prior Art In general, an automobile seat back has a pipe frame 2 attached to a seat back panel 1 as a reinforcing member, as shown in FIG. In order to make the seat bag 1 foldable, a pivot pin 3 is welded to the peripheral surface of the end of the lower pipe frame 2, as shown in FIG. ). By the way, since the pivot pin 3 is arc welded to the end of the lower pipe frame 2, the spot welding part A of the lower pipe frame 2 to the seat back panel 1 is inside the welding part B of the pivot pin 1. Become.
For this reason, if a large load is applied to the pivot pin 3 in the direction of the arrow in the figure, that is, in the peeling direction, there is a risk that the spot welded portion I will peel off, which poses a problem in strength resistance.

C. Purpose of the invention The purpose of the invention is to improve the rigidity of the seat back hinge of an automobile.

D. Structure of the invention In the present invention, in a seat bag that is pivotally attached to a seat back mounting member so that it can be folded down, the end of a pipe frame fixed in the width direction of the seat back panel is compressed, and the compressed end is shaped into an L-shape. The bent portion is welded to the flange portion of the seat back panel, the flat portion is welded to a portion adjacent to the flange portion, and the pivot pin is welded to the bent portion of the pipe frame, Its inner end is welded to the circumferential surface of the non-squeezed portion of the pipe frame, which is inside the compressed end.

E. Embodiment FIGS. 3 and 4 show embodiments of the present invention. In the figure, reference numeral 11 denotes a seat back panel constituting the seat back of an automobile, and a flange portion 12 is formed on the outer peripheral edge of the seat back panel. Reference numeral 13 denotes a pipe frame fixed to the upper and lower edges of the seat back panel 11 by spot welding at a plurality of places. 14 is bent into an L-shape, and the bent portion 15 is welded to the inner surface of the flange portion 12 of the seat back panel 11, and the flat portion 16 is spot-welded to a portion adjacent to the flange portion 12. 17 is a round bar-shaped pivot pin that is pivotally connected to the seat back mounting member (not shown);
This pivot pin 17 is penetrated and welded to the bent portion 15 of the lower pipe frame 13, and its inner end 18
is arc welded to the circumferential surface of the non-squeezed part 20 inside the compressed end 14 of the lower pipe frame 13 and fixed to the bridge at a position above the compressed end 14, with the tip 19 protruding outward. .

Therefore, the welding area between the flat part 16 of the compressed end 14 of the lower pipe frame 11 and the seat back panel 11 is inside the welding area between the lower pipe frame 13 and the pivot pin 17, and The bent portion 15 of the compressed end portion 14 and the flange portion 12 of the seat back panel 11 are welded together in the direction of the load acting on the pivot pin 17 in the direction of the arrow in the figure. Therefore, even if a load is applied to the pivot pin 17 in the direction of the arrow shown in the figure, that is, in the peeling direction, the welded portion between the lower pipe frame 13 and the seat back panel 11 will not peel off.

FIG. 5 shows another embodiment of the present invention.
In this embodiment, the bent portion 1 of the lower pipe frame 13 is
5 is further bent outward to form a mounting piece 21, on which the pivot pin 17 is placed and welded.

FIG. 6 shows still another embodiment, in which a bent portion 22 of the compressed end portion 14 of the lower pipe frame 13 is shown.
The end edge of the pivot pin 17 is notched in an arc shape, and the pivot pin 17 is fitted into the notch 23 and welded.

E. Effects of the invention The present invention, in which a seat back is pivotally attached to a seat back mounting member so that it can be folded down, compresses the end of a pipe frame fixed in the width direction of the seat back panel, and forms the compressed end into an L-shape. The bent portion is welded to the flange portion of the seat back panel, and the flat portion is welded to a portion adjacent to the flange portion, while the pivot pin is welded to the bent portion of the pipe frame. Since the inner end portion is welded to the circumferential surface of the non-squeezable portion of the pipe frame inside the compressed end portion, the rigidity of the hinge portion of the seat bag can be improved. In particular, according to the present invention, the bent part of the pipe frame to which the pivot pin is welded is welded to the flange part of the seat back panel, and the flat part is welded to a part adjacent to the flange part, so that the pivot pin can be attached to the peeling direction. Even when a large load is applied, the end portion of the pipe frame does not separate from the seat back panel, and the rigidity of the entire hinge portion of the seat back can be greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted explanatory diagram showing the hinge structure of a conventional seat bag, Fig. 2 is a sectional explanatory view of the main part thereof, and Fig. 3 is a perspective view of the main part showing the hinge part structure of the seat bag according to the present invention. FIG. 4 is an explanatory cross-sectional view thereof, and FIGS. 5 and 6 are explanatory views showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 11... Seat back panel, 12... Flange part, 13... Pipe frame, 14... Compressed end part, 15... Bent part, 16... Flat part, 17...
Pivot pin, 18...Inner end portion, 20...Non-squeezable portion.

Claims (1)

[Scope of utility model registration request] In the case where the seat back is pivotally attached to the seat back mounting member so that it can be folded down, the end of the pipe frame fixed in the width direction of the seat back panel is compressed, the compressed end is bent into an L shape, and then bent. The flat portion is welded to the flange portion of the seat back panel, and the flat portion is welded to a portion adjacent to the flange portion,
The other pivot pin is welded to the bent portion of the pipe frame, and its inner end is welded to the circumferential surface of the non-squeezed portion of the pipe frame inside the compressed end. .