Patent ID: 7537126
Filing Date: 2009-05-26
Classification: B66C

Abstract:
1. A crane, comprising: a crane body; a boom connected to the crane body so as to be pivotable; a plurality of tilt members including the boom, the tilt members pivoting as a whole in accordance with pivoting of the boom; a main hoisting rope and an auxiliary hoisting rope for each hoisting a hanging load, the main and auxiliary hoisting ropes being each hung from an end portion of one of the tilt members; a main hoisting winch for reeling in and reeling out the main hoisting rope; an auxiliary hoisting winch for reeling in and reeling out the auxiliary hoisting rope; a boom pivoting member connected to the crane body; a boom pivoting rope strung in an area between the boom pivoting member and the crane body or between the boom pivoting member and the boom; and a boom pivoting winch for reeling in and reeling out the boom pivoting rope to pivot the tilt members, wherein both the main and auxiliary hoisting winches are mounted on the boom, and the boom pivoting winch is mounted on the boom pivoting member, wherein, in addition to the boom, the tilt members include a jib which is connected to a top end portion of the boom so as to be pivotable in a direction with respect to the boom, and are provided with a jib pivoting rope for pivoting the jib and a jib pivoting winch for pivoting the jib by reeling in and reeling out the jib pivoting rope, the jib pivoting winch being mounted on the boom.