| 摘要 |
PROBLEM TO BE SOLVED: To attach/detach fixing parts in a treat member fixing device of a crawler crane easily and safely on the outside of the treat member. SOLUTION: In the crawler crane with the tread member 11 which can be detached or extended/retracted, a through hole 18 for inserting an axle beam 12 into the tread member 11 is formed and lugs 10 are mounted on the end surface of the axle beam 12. In addition, lugs 20 are disposed outside the tread member 11 corresponding to the lugs 19, and a fixing link 21 is detachably attached between the lugs 19 and 20. The tread member 11 is fixed at a working position where the tread member 11 is extended by the fixing link 21 or at a retracting position where the tread member 11 is retracted by the fixing link 21, and attaching/detaching of the fixing link 21 is performed outside the tread member 11.
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