| 摘要 |
PROBLEM TO BE SOLVED: To install a large building on a frame while securing the rigidity of a boom. SOLUTION: A narrow foot portion 28, which has a width dimension (a) smaller than the horizontal width dimension A of a wide boom portion 31 provided on the side of the leading end of the boom 27, is provided in a range, in which interference with a cab 19 is avoided when the boom 27 is turned with respect to a revolving frame 6, on the side of the base end of the boom 27 constituting working equipment 21. In this way, since the horizontal width of the cab 19 can be increased toward the side of the boom 27 because the narrow foot potion 28 is provided on the side of the base end of the boom 27 adjacently arranged on the right side of the cab 19, the large cab 19 can be provided on the revolving frame 6. COPYRIGHT: (C)2008,JPO&INPIT
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