| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate an assembly operation of a crane having a backstop. <P>SOLUTION: A guide member 70 is rotatably pivoted by the own weight in the vicinity of a receiving part 61 being an abutment part of a target 60, guides the other end 52 of a backstop 50 to the receiving part 61 during a crane operation, guides the other end 52 of the backstop 50 so that it does not abut against the receiving part 61 during the disassembly of the crane, and guides the other end 52 of the backstop 50 by supporting it from below during the assembly of the crane. A magnet 81 attracts the guide member 70 by magnetic force during the assembly of the crane to prevent turning of the guide member 70 due to the own weight. <P>COPYRIGHT: (C)2013,JPO&INPIT |
