Construction machine

A construction machine whose operation can be switched between manned operation and unmanned operation, the construction machine comprising:

• a machine controller that controls an action of the construction machine;
• an external operation controller that controls unmanned operation that does not require operation by an operator riding in an operation room, by generating a control signal according to an operation signal received from an outside via a communication terminal, and sending the control signal to the machine controller;
• an approach permission signaling light that signals permission for a worker to approach the construction machine;
• and
• an action request signaling light that signals a request for riding in the operation room and performing a particular action for recovery work from an anomalous state to a nearby worker, wherein
• the approach permission signaling light is arranged on a front left side of the operation room such that the approach permission signaling light can be easily recognized by a riding operator in the operation room, and
• the external operation controller is configured to control the approach permission signaling light to be turned on and the action request signaling light to be turned off at a time of manned operation when an engine has been stopped or the construction machine action is disabled because a lock valve that switches an action of the construction machine between permission and prohibition is at an interrupting position, and when it is decided that approach of the worker to the construction machine can be tolerated according to information collected by the machine controller, and control the approach permission signaling light and the action request signaling light to be turned on after stopping the unmanned operation and switching the lock valve to the interrupting position and so that operation only by the riding operator in the operation room is enabled at a time of unmanned operation when the anomalous state occurs that requests the worker to ride in the operation room and perform the particular action, or when a signal for turning on the action request signaling light is received by the construction machine from a control room that is managing/monitoring the unmanned operation.