| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure of a sheave block that prevents a wire from abutting on one side of the sheave block and is free from the uneven wear of the sheave block in a derrick device and the like of a marine cargo handling device. <P>SOLUTION: The sheave block 3 of the cargo handling device for a ship includes a wire guide ring 1 which is concentric therewith and rotatably supported in one or two directions of an outer circumference via a ring support member 2 having a predetermined length, and which a moving wire penetrates. <P>COPYRIGHT: (C)2012,JPO&INPIT |
