| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rail member that can be used in common while the strength of the rail member is increased.SOLUTION: A rail member is segmented into a first portion AR1 located at one side of a virtual line X1 and a second portion AR2 located at the other side of the virtual line X1 different from the one side. Regulation structures are formed in both of the first portion AR1 and the second portion AR2, and at a collision of a vehicle, a uniform force is applied to each of the regulation structure 50A of the first portion AR1 and the regulation structure 50B of the second portion AR2. While an upper rail 30 can be mounted to one side of a frame member, a lower rail 21 at a first portion AR1 side can be mounted to a cabin structure FS, and also, while the upper rail 30 can be mounted to the other side part of the frame member different from the one side, a lower rail 22 at a second portion AR2 side can be mounted to the cabin structure FS. |
