Patent ID: 7500535

Claim:
A control device for a construction machine comprising: an engine as a power source adapted to be started/stopped based upon an operation applied to an engine switch, a hydraulic actuator for operating upon a hydraulic pump as a driving source, hydraulic lock control means for locking said hydraulic actuator in a hydraulic lock active condition where said hydraulic actuator is in an inactive state upon a predetermined hydraulic lock condition being met and unlocking said hydraulic actuator upon a predetermined hydraulic unlock condition being met, engine control means for carrying out an automatic stop control to automatically stop said engine upon a predetermined automatic stop condition being met, restart instructing means for issuing a restart command to said engine control means via a route independently of that of the engine switch and independently of the hydraulic unlock condition, wherein said engine control means is configured to restart said engine based upon the restart command from said restart instructing means after an automatic stop of said engine by the automatic stop control, an operating member for instructing activation of said hydraulic actuator, and a restart sensor as said restart instructing means for transmitting the restart command to said engine control means upon detecting an operation applied to said operating member by an operator.