| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a telescopic boom device capable of forming a boom in the long size, while restraining complicatedness of laying-around of a wire, by extending the number of a plurality of booms to seven stages. <P>SOLUTION: This telescopic boom device 1 has the plurality of booms 10-16 successively fitted and inserted so as to be freely slidable, and an expansion mechanism for expanding the plurality of these booms 10-16. This expansion mechanism comprises a first expansion means having two telescopic cylinders 21 and 24 adjacently arranged in the telescopic direction of the plurality of booms 10-16, and a second expansion means for expanding the predetermined booms 14-16 by using tension of wire ropes 41-45 by interlocking with expansion operation of its first expansion means. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
