| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction car capable of avoiding the lowering of a boom even when a travelling damper function is worked during a travelling. SOLUTION: In the construction car, the bottom 12b of a boom cylinder 12 and an accumulator 8 are connected when a car running speed reaches a fixed value or more and the damper function is imparted. The damper function is brought to an off state when the boom cylinder 12 is brought to a floated state. Accordingly, a damper-working position is not obtained in the case of the floating position, and the lowering of the boom can be prevented. COPYRIGHT: (C)2006,JPO&NCIPI
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