| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase attaching strength between a cab supporting sponson beam and a side frame even when a falling regulation device is attached to a weak part of the cab supporting sponson beam. <P>SOLUTION: A cab supporting sponson beam 7 for supporting the rear side part of a cab 8 on a revolving frame 5 is formed by being bent into a J shape to be a vertical plate part 7A extended in left and right directions, an upper side horizontal plate part 7B projected in a front direction from the upper end part of the vertical plate part 7A and a lower side horizontal plate part 7C projected in the front direction from the lower end part of the vertical plate part 7A, and a vibration-proof mount and the falling regulation device are arranged at the upper side horizontal plate part 7B. Then, a reinforcing member 25 is provided between the front end of the upper side horizontal plate part 7B of the cab supporting sponson beam 7 and a left side frame 5D. Thus, stress transmitted from the cab supporting sponson beam 7 to the left side frame 5D is dispersed by the reinforcing member 25, and the strength of a fixed part is increased. <P>COPYRIGHT: (C)2012,JPO&INPIT |
