| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an anti-theft device of a working machine capable of surely performing the setting or release of an anti-theft mode. <P>SOLUTION: This anti-theft device is provided with an emergency stop switch 50 provided in a crane, and a control device 51 capable of controlling an unload valve 30, to which the operation signals of operation levers 32, 33, 34, 35, 36L, 36R are input respectively. This control device 51 is capable of setting and releasing the anti-theft mode based on the emergency stop switch 50 and the operation of the respective operation levers. When it is set, the unload valve 30 is made to be unloaded, and secret data are set according to the operation of the respective operation levers. Furthermore, when it is released, certificate data are set according to the operation of the respective operation levers, and the secret data is compared with the certificate data, and then, the unload valve 30 is made to be on-loaded only when they are mutually consistent. <P>COPYRIGHT: (C)2008,JPO&INPIT |
