| 摘要 |
PROBLEM TO BE SOLVED: To improve the strength of a cab by forming a deformation beginning part, which becomes a beginning for permanent deformation so as to make a rear cross member crush in the longitudinal direction of the cab, in the longitudinal direction of the rear cross member at the time when compressive load in the longitudinal direction of the cab acts on the rear cross member. SOLUTION: When external force in the longitudinal direction is added to a cab 1, and compressive load in the same direction acts on a rear cross member 14, this member 14 is positively made into compressive deformation with a bead 21 as a beginning. With this, it absorbs energy of the external force added to the cab 1. At this time, the rear cross member 14 is lengthened in the width direction of the cab 1, and its board thickness is large enough, and since it is a member having high rigidity inherently, the rear cross member 14 like this is made into the permanent deformation so as to be crushed in the longitudinal direction, so that large energy is thus absorbable. Accordingly, the board thickness of each panel constituting the cab 1 can be set up to be smallish. |
