| 摘要 |
PROBLEM TO BE SOLVED: To reduce warping of a chamber member after molding. SOLUTION: This chamber member 7-1 forms a long shape extended in substantially an arch shape in the right and left directions of a vehicle and having a chamber space 7a therein. A rear wall part 7-1a arranged on an installation face of a bumper reinforcement 4 is bent in an arch shape in the vertical direction of the vehicle to form an arch-shaped space between the installation face where the bumper reinforcement 4 is arranged and the rear wall part 7-1a. Consequently, section modulus is increased by virtue of the arch shape, and rigidity of the chamber member 7-1 itself is dynamically increased. COPYRIGHT: (C)2011,JPO&INPIT
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