| 摘要 |
In vertically-movable steps (10), the upper ends of a front connection member (11) and a rear connection member (12) located at the highest level are turnably connected to the lateral positions of a vehicle body (2), and arranged side-by-side at a predetermined spacing in the vehicle longitudinal direction. The upper ends of a front connection member (14) and a rear connection member (15) located below the highest level are turnably connected to both vehicle longitudinal direction ends of a step board (13) that is located at the next higher level. The front connection member (11) and the rear connection member (12) located at least at the highest level among the levels above the lowest level are rigid members. The front connection member (14) and the rear connection member (15) located at least at the lowest level among the levels below the highest level are provided so as to be elastically deformable. |
