| 摘要 |
PROBLEM TO BE SOLVED: To provide a coupling structure of a rear frame having a high stiffness capable of hindering the rear frame from causing a folding deformation and suppressing twisting of the rear frame by transmitting an impact load applied from behind the rear frame smoothly to side sills. SOLUTION: A stiffness complementing member 40 to couple the oversurface part 18 of the side sill 10 with the bottom wall 35 of the rear frame 30 located behind a kickup part 31 is installed in the coupling part between the side sill 10 and the rear frame 30. The impact load F applied to the back of the rear frame 30 is transmitted from the bottom wall 35 of the rear frame 30 located behind the kickup part 31 to the oversurface part 18 of the side sill 10 through the stiffness complementing member 40. This reduces concentration of the stresses in the kickup part 31 of the rear frame 30, and folding of the rear frame 30 is suppressed. COPYRIGHT: (C)2005,JPO&NCIPI
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