| 摘要 |
PROBLEM TO BE SOLVED: To regulate a height of a tip of a telescopic boom within a limited height to prevent the height of the telescopic boom from exceeding the limited height.SOLUTION: In a crane 1 for mounting a road-rail vehicle, a telescopic boom 5 is installed at a tip of a column post 4 in such a manner as to be telescopic only in a horizontal direction, and a trolley device 20 constituted by suspending a hook 21 is provided in the telescopic boom 5 in such a manner as to be movable along the telescopic boom 5. The column post 4 is installed in such a manner as to be vertically telescopic on a slewing machine base. Thus, a boom derricking mechanism among the boom derricking mechanism, a boom slewing mechanism and a boom expansion/contraction mechanism is not provided. |
