| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the joint strength of a cab supporting inner frame to a center frame. <P>SOLUTION: A cab supporting inner frame 26 for supporting a cab 6 together with a cab supporting front frame 32 is formed as an L-shaped box structure by a horizontal frame part 26A extending in left and right directions on a bottom plate 13 and a vertical frame part 26B projected to the front more than the bottom plate 13 from the horizontal frame part 26A. Then, the horizontal frame part 26A of the cab supporting inner frame 26 is joined to the bottom plate 13 and a left vertical plate 14 of a center frame 12 by welding or the like. Thus, the proximal end side of the cab supporting inner frame 26 is directly joined to the center frame 12 which is the strongest member of a revolving frame 11, and the joint strength of the cab supporting inner frame 26 to the center frame 12 is increased. <P>COPYRIGHT: (C)2012,JPO&INPIT |
