| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a burglarproof device which can select the cases that an engine is started only by turning a keyswitch on without inputting an identification number with the intention of an operator to operate a machine mainbody and that the engine cannot be started to operate the machine mainbody if the identification number is not input. SOLUTION: A keyswitch 2 for starting or stopping an engine 1, an identification number input device 14 and a solenoid control 7a of an electromagnetic valve 7 are respectively connected to a controller 13, so that a system is put down in the brake-off condition of a turning brake 6(6a-6d) when the keyswitch 2 is turned off during engine stop and a certain time (t-second) passed, the system is put down in the braking condition of the turning brake 6 when the keyswitch 2 is turned off and the keyswitch 2 is turned on/off within a certain time (t-second), the keyswitch 2 is turned on when the braking condition is set, a brake-off signal is generated only when a predetermined identification number is input to the identification number input device 14 and the brake-off signal is generated only by turning the keyswitch 2 on when the brake-off condition is set.</p> |
