| 摘要 |
PROBLEM TO BE SOLVED: To provide a crane capable of preventing skew runout (runout in a slewing direction) of a hanger by applying the same tensile forces to ropes, respectively.SOLUTION: Unwinding and winding positions Pa1-Pa4 of a first rope group Wa of a drum 7a and unwinding and winding positions Pb1-Pb4 of a second rope group Wb of a drum 7b are arranged in such a manner as to be plane-symmetrical with respect to a vertical plane VF1 as a y-z plane. A first roping structure 10a formed of the first rope group Wa unwound and wound up by the drum 7a and a second roping structure 10b formed of the second rope group Wb unwound and wound up by the drum 7b are arranged in such a manner as to be plane-symmetrical with respect to the vertical plane VF1 as the y-z plane. |
