WIRE GUIDE HOUSING DEVICE OF MULTI-STEPS TELESCOPE BOOM

摘要

PROBLEM TO BE SOLVED: To house so as to shorten a boom length and reduce the loosening of a wire rope at a stretch time. SOLUTION: In a multi-steps telescope boom 1 with a structure housed so that the tip ends 31, 41 of the intermediate booms 3, 4 may be entered in the boom head 51 of a tip boom 5 and surrounded by the boom head 51 at the housing time, a wire guide 8 for guiding and holding a wire rope 7 arranged along the lower side of the boom is hung to the tip end 31 of the intermediate boom 3 turnably in front/rear side and a stopper 9 for turning backward after contacting with the wire guide 8 at the storing time on the rear end of the boom head 51 of the tip end boom 5 is provided.