| 摘要 |
PROBLEM TO BE SOLVED: To provide a crane for being mounted on a track/land vehicle, which can secure safety of work on a rail track while maintaining convenience of an on-vehicle crane.SOLUTION: In a crane 1 for being mounted on a track/land vehicle, a column post 4 has a post expansion mechanism capable of being vertically expanded and contracted on a slewing machine base 19, and a telescopic boom 5 makes a boom hoisting cylinder 90 of a boom hoisting mechanism and a column expansion cylinder 43 of the post expansion mechanism operate in a switching manner. |
