| 摘要 |
PROBLEM TO BE SOLVED: To allow a shuttle boom to be stably moved (slid) by improving rectilinearity of the shuttle boom and allow occurence of noise to be suppressed.SOLUTION: In a quay crane, in which a running device 13 is arranged below a leg part structure 11, a shuttle boom 2 that can be slid in a traverse direction in the leg part structure 11 or a frame-type structure 22 provided above the leg part structure, a plurality of rails 7 are arranged in the shuttle boom 2 at predetermined intervals in a running direction of the quay crane and the rails 7 are held respectively by supporting wheels 5 that have brims on both left and right sides like pulleys, a holding member 24 that contacts an inside face and an outside face of each rail 7 is provided in the leg part structure 11 or the frame type structure 22 and the rails 7 so that the rails 7 are prevented from meandering by the holding member 24. |
