A FOLDED CRANE

摘要

PURPOSE: A foldable crane is provided to improve the stability of a crane barge or a mobile harbor by lowering the height of a crane when the crane is moved. CONSTITUTION: A foldable crane(350) comprises guide frames(302), a lifting frame(304), foldable link members(308), and a lifting drive unit. The guide frames are installed in vertical beams(300) of a crane. The lifting frame is lifted along the guide frames. The foldable link members are connected to the lifting frame and the guide frames. The lifting drive unit lifts the lifting frame along the guide frames by powering the foldable link members.