| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve stability in a crawler crane by mounting a weight before and behind a car body while improving stability for supporting the car body by a lift device. <P>SOLUTION: In the crawler crane, a front side weight support 44 supports a front side left weight 72 and a front side right weight 74 so that the front side left weight 72 and the front side right weight 74 can be displaced between respective work time front side weight positions and respective retreat time front side weight positions positioned at the front side rather than a front side left lift device 58 and a front side right lift device 60 existing in front side storage positions, and a rear side weight support 46 supports a rear side left weight 76 and a rear side right weight 78 so that the rear side left weight 76 and the rear side right weight 78 can be displaced between respective work time rear side weight positions and respective retreat time rear side weight positions positioned at the rear side rather than a rear side left lift device 62 and a rear side right lift device 64 existing in rear side storage positions. <P>COPYRIGHT: (C)2013,JPO&INPIT |
