| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an anti-theft device of a construction machine for shutting off the supply or return of pressure oil to a traveling device in order not to enable travelling only by attaching a simple device without a wide space. <P>SOLUTION: In a hydraulic circuit of a construction machine, a top revolving superstructure is revolvingly installed on a bottom traveling body having a traveling device, and a main pump, a traveling direction switch valve, and a remote-control valve for switching the traveling direction switch valve are installed to the top revolving superstructure, while a counterbalance valve is installed to the traveling device of the bottom traveling body. A lock device is installed to the counterbalance valve, and traveling is disabled under a condition that the counterbalance valve is locked, to prevent theft of the construction machine. <P>COPYRIGHT: (C)2004,JPO |
