Outer boom Tip structure of the portable type crane which possesses folding boom

摘要

(57) Abstract Objective As for this device, at the time of crane job suspender hanging pulleyThe projection tonnage from intrados of outer boom can be guaranteed sufficientlyAlthough being, in folding state of outer boom upper buThe top which can make the projection tonnage from intrados of muIt designates that Tip structure of boom is offered as purpose. Constitution Tip 6 of outer boom 5, in outer boom 5The framework body 1 which is laid out fixed and has wire guide pulley 7Way 2, the projection tonnage from intrados of outer boom 5 it is alteration possible,In aforementioned framework body 12 expansion and contraction possibly in that projection destal of Inlaying putting aforementionedThe expansion and contraction component 13 which has suspender hanging pulley 8, and the aforementioned framework bodyTo be laid out between 12 and expansion and contraction component 13, expansion rank of expansion and contraction component 13Those which it consists with the fixed installation 14 which locks the position.