| 摘要 |
PROBLEM TO BE SOLVED: To provide an impact absorber for a vehicle, capable of securing impact absorption performance required, particularly, having superior impact absorption performance right after the impact is applied, and thereby capable of maintaining high impact absorption performance.SOLUTION: An impact absorber 1 for a vehicle is provided for absorbing an impact energy in collision by internal arrangement in a vehicle component, and is made of thermoplastics. The impact absorber includes a first wall 4 disposed at the side for receiving the impact, and a second wall 5 facing the first wall 4 at intervals. A hollow section 2 is formed by connecting the first wall 4 and the second wall 5 with a circumference wall 3. Also, a deep groove section 15 is formed by concaving the first wall 4 and the second wall 5 in a recessed groove shape, respectively, and by integrally joining each distal surface to make a welding surface. Shallow groove sections 16 are formed by facing each distal surface at intervals. Impact absorption ribs 9 are provided which includes both grooves sequentially in the longitudinal direction of concaves in the recessed groove shape. An average value of the intervals in the shallow groove sections 16 is formed in the range of 0.3D-0.8D to an average value of the interval between the first wall 4 and the second wall 5. |
