| 摘要 |
PROBLEM TO BE SOLVED: To prevent bearing strength from lowering without increasing vehicle weight substantially. SOLUTION: A burring-shaped hole expansion section 12 having a cylindrical section 12a is formed in a side plate 11 made from a thin plate. A rivet 30 is inserted into the through hole 12b inside the hole expansion section 12 and the through hole 24 made in an upper rail 22 made from a thick plate, and the side plate 11 and the upper rail 22 are connected to each other. COPYRIGHT: (C)2003,JPO
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