| 摘要 |
PROBLEM TO BE SOLVED: To configure a seat back frame for a vehicle so as to reduce the number of components, reduce weight, improve strength together with dimensional precision and easily perform welding work as well. SOLUTION: The seat back frame mainly includes left and right side frames 1 and 2 press-molded into a predetermined shape from an ultra-high tensile strength steel plate, an upper member 3 between the upper portions of the side frames 1 and 2 and a lower member 4 between the lower portions of the side frames 1 and 2. The side frames 1 and 2 are formed into a roughly inward U-shape in the cross-section, and the lower member 4 is provided by integrally bending a main member part 40 over the side members 1 and 2 and side member parts 41a and 41b protruding forward from both end sides of the main member part 40. The plate surfaces facing each other of the respective members are bonded by spot-welding and assembled into a roughly quadrangular frame shape with the side frames 1 and 2 are main columns. COPYRIGHT: (C)2008,JPO&INPIT
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