| 摘要 |
PROBLEM TO BE SOLVED: To provide a crane preventing deformation or the like of a revolving frame and effectively reducing the vehicle width of a revolving super structure in operation while minimizing the weight increase and cost increase of the revolving frame. SOLUTION: The revolving super structure is mounted on a base carrier through a swing bearing so as to be revolvable around a revolving center axis. The revolving super structure comprises a base composed of the revolving frame 7 having right and left side plates 6R, 6L, and right and left deck frames 8R, 8L mounted to both sides of the revolving frame. The breadth of one deck frame 8R out of the right and left deck frames is set larger than that of the other deck frame 8L, and a cab and a power unit are arranged in front and in the rear on the one deck frame. The revolving center axis is set closer to the cab-side side plate from the centerline CL of the revolving frame in a plan view, and in the revolving frame, the rigidity on the cab side is set higher than that on the anti-cab side with the centerline in between. COPYRIGHT: (C)2010,JPO&INPIT
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