| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation control device for a construction machine which notifies a gate lock switch failure to an operator and allows actuation and stop of hydraulic actuators to be controlled under such circumstances. <P>SOLUTION: In the operation control device for a construction machine, a gate lock switch opened and closed by a gate lock lever 15 comprises a gate lock first switch 37 and a gate lock second switch 38. Provided between the switches 37, 38 and an electromagnetic valve 43 are a switching relay 41 for outputting a failure detection signal as a signal outputting means when any of the first and second switch 37, 38 fails, a warning buzzer 48 for notifying the failure of the switches 37, 38 when the failure detection signal is outputted from the switching relay 41, and a diode 49 for electrical conduction between the warning buzzer 48 and the electromagnetic valve 43 so as to allow the electromagnetic valve 43 to be operated even under the failure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
