Patent ID: 7086547

Claim:
A traveling working machine comprising: a lower traveling body; an upper rotating body mounted rotatably on said lower traveling body, said upper rotating body having a rotating frame and winches; a boom mounted on said upper rotating body so as to be capable of rising and lowering; and a pair of right and left frames which support the boom formed in said rotating frame to pivotally support both right and left sides of a rear end portion of said boom, axial portions of the winches, including maximum-diameter portions of the winches, being mounted inside rear portions of said frames which support the boom, said frames which support the boom having recessed cut-outs along smaller-diameter portions of one of the winches than said maximum-diameter portions, said smaller-diameter portions not including shafts of said one of the winches, wherein the rear portions of said frames which support the boom at each side of the machine comprise a fixed frame and a detachable frame connected detachably to said fixed frame, and winch openings adapted to pass the smaller-diameter portions of said one of the winches are formed by the recessed cut-outs and the detachable frames when both said fixed and detachable frames are connected together so as to sandwich the smaller-diameter portions of said one of the winches with the detachable frames supporting said one of the winches from below.