| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight and manufacturing costs by increasing the strength of a strut against torsion without making the strut thicker or providing a rib for reinforcement and the like. SOLUTION: Right and left struts 19 and 19 for supporting a roof 21 above a driver seat 15 are constituted so that vertical column parts 19A of the struts 19 and 19 can be disposed in positions made close to each other. Accordingly, because the two column parts 19A, respectively, constitute such a planar structure as to move integrally without moving separately, the planar structure permits the strength of the strut 19 against torsion to be increased without making the strut 19 thicker or separately providing the rib for reinforcement and the like by means of a conventional technology. This enables a reduction in the weight of the strut 19 and the manufacturing costs.
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