Method for welding upper rail of seat track for vehicle seat and adaptor bracket

Abstract

The present invention relates to a method for welding an upper rail of a seat track for a vehicle seat and an adaptor bracket for fixing a seat frame, the method comprising the steps of: surface contacting a bottom surface of a plate-shaped coupling face, which forms the lower end part of the adaptor bracket and which is extended to a predetermined length in the longitudinal direction, with a top surface of a plate-shaped horizontal face, which forms the upper end part of the upper rail and which is extended in the longitudinal direction; and welding a bottom surface of the horizontal face that overlaps the coupling face to bond the coupling face and the horizontal face. Accordingly, it is possible to improve the welding hardness of the upper rail of the seat track and the adaptor bracket, and to significantly reduce the time required for welding, compared to conventional welding methods in which welding is performed along the edge of the coupling face.

Description

technical field [0001] The invention relates to a method of welding to the upper rail of a seat rail an engaging bracket which mediates the connection between the seat rail and the seat frame constituting a vehicle seat. Background technique [0002] The seat rail of the vehicle seat includes a lower rail (not shown) fixed to the bottom plate of the chassis portion and upper rails 10 , 10 ′ coupled with the lower rail so as to be slidable in the longitudinal direction. [0003] The upper rails 10, 10' have the same cross-section and extend longitudinally, and the upper rails 10, 10' have at their upper ends a flat horizontal surface portion 11, 11' also extending longitudinally. A plurality of engaging brackets 21 to 24 are coupled with the upper surfaces of the horizontal surface parts 11, 11'. [0004] The joint brackets 21 to 24 serve as connectors for mounting the seat frame (not shown) on the seat rail. [0005] Conventionally, this is accomplished by contacting the l...

AI Technical Summary

Problems solved by technology

[0006] However, according to conventional welding methods between the upper rails 10, 10' and the joint brackets 21 to 24, the welding length is limited to the length of the edges of the connecting surface portions 22a, 24a.

Therefore, the joint strength obtained by welding between parts is also limited

[0007] In this case, due to insufficient welding strength, the seat frame may be separated from the seat rail when an impact such as a collision occurs between the vehicles, resulting in a serious traffic accident

[0008] Also, in terms of manufacturing process, the welding work along the edges of the connecting surface portions 22a, 24a as described above requires excessive man-hours due to the small size and complicated shape.

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