| 摘要 |
PROBLEM TO BE SOLVED: To make a container crane light-weighted and to shorten a cargo- handling time. SOLUTION: A center trolley of three trolleys traveling on girders 31, 32 is provided with a receiving base for placing a container from respective hanging tools 42, 46 of both sides trolleys 41, 45. The trolley 60 hangs down the receiving base 61 by a rope 62. An unloading is carried out by hanging up the container on the receiving base by the trolley 45 and placing it on the receiving base. The trolley 41 hangs up the container on the receiving base and unloads on a land side. A height position of the receiving base is a height making the lowermost height at which the trolley 45 can travel as a standard in the state of hanging up the container. The height position of the receiving base gradually descends accompanying with a progress of the unloading. At the time of a shipping, the position of the receiving base gradually rises. An auxiliary beam 37 on which the trolley 60 travels is positioned at a nearer land side than a connection point of a tension bar 28 and a boom 32. |
