| 摘要 |
PROBLEM TO BE SOLVED: To enhance stability at working of a movable crane by forming outriggers into a curved shape. SOLUTION: Outriggers 1 of a movable crane vehicle are formed not into a square pole shape but rather into a curved shape. The outriggers 1 of the movable crane vehicle are made into the curved form, whereby the contact points on the ground of floats 3 in crane working can be longitudinally and laterally symmetric. When the contact points on the ground of the floats 3 are longitudinally and laterally symmetric in crane working, the stabilizing force of the crane becomes maximum. Namely, since high stability can be exhibited, the work of turning and moving a boom 4 as an article is suspended from a hook 5 can be stably performed. Furthermore, since safety is further enhanced, this also contributes to reduction of accidents.
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