| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction machine having a structure in which a cab thereof is tilted up relative to a revolving frame, where the cab is prevented from coming into contact with a front work machine as a worker continues to tilt up the cab without noticing. <P>SOLUTION: A controller 85 receives output signals of first and second rotary switches 36, 136 which detect a tilt of a cab 7 in a vertical direction and a third rotary switch 80 which detects rotation of a boom 17 in the vertical direction, and tilts the cab 7 to a predetermined angle suitable to maintenance operation. In this case, when the cab 7 begins to be tilted upward while the boom 17 is positioned at a rotational angle where the cab 7 and boom 17 possibly come into contact with each other, a first notice signal is output to operate a buzzer 85 in a first mode, and when the cab 7 is tilted up to a predetermined angle suitable to the maintenance operation, a second notice signal is output to operate the buzzer 86 in a second mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
