Construction machine
Provided are a machine controller that controls operation of the hydraulic excavator, an external operation controller that executes control of unattended operation that does not require operation through riding of an operator in a cab, by generating a control signal according to an operation signal received from the external through a communication terminal and sending out the control signal to the machine controller, an operation indicator light that indicates that the unattended operation of the hydraulic excavator is normally in operation, and an approach permission indicator light that indicates permission of approach of a worker to the hydraulic excavator. The external operation controller, according to information collected into the machine controller, turns on the operation indicator light when determining that the hydraulic excavator is normally operating, and turns on the approach permission indicator light when determining that approach of the worker to the hydraulic excavator is permissible.
1 . A construction machine that has an engine and executes work at a construction work site, the construction machine comprising:
a machine controller that controls operation of the construction machine;
an external operation controller that executes control of unattended operation that does not require operation through riding of an operator in a cab, by generating a control signal according to an operation signal received from external through a communication terminal and sending out the control signal to the machine controller;
an operation indicator light that indicates that the unattended operation of the construction machine is normally in operation; and
an approach permission indicator light that indicates permission of approach of a worker to the construction machine, wherein
the external operation controller is configured to, according to information collected into the machine controller, execute control to turn on the operation indicator light when determining that the construction machine is normally operating, and execute control to turn on the approach permission indicator light when the control state of the construction machine is either an unattended operation standby state in which operation by the operator who rides in the cab or operation by the operation signal received from external by the construction machine is impossible or an unattended operation forcibly-stopped state in which the construction machine has received an emergency stop signal from the external, and when the engine is stopped or the lock valve that switches whether or not operation of the construction machine is at the interruption position.
2 . The construction machine according to claim 1 , wherein
the operation indicator light and the approach permission indicator light are each disposed at a different position.
3 . The construction machine according to claim 2 , wherein
indication colors of the operation indicator light and the approach permission indicator light are a same color.
4 . The construction machine according to claim 2 , wherein
the operation indicator light is disposed on an upper side of the cab in which the operator rides, and
the approach permission indicator light is disposed on a lower side of the cab.
5 . The construction machine according to claim 2 , wherein
the operation indicator light is disposed on an upper part of a machine body of the construction machine, and
the approach permission indicator light is disposed on the machine body on a lower side relative to the operation indicator light.
6 . The construction machine according to claim 2 , wherein
the operation indicator light is disposed at a position incapable of being visually recognized from the operator who rides in the cab, and
the approach permission indicator light is installed at a position allowed to be visually recognized from the operator who rides in the cab and a position allowed to be visually recognized from a worker in surroundings of the cab.
7 . The construction machine according to claim 1 , wherein
the construction machine includes a turn-on condition changeover switch that is disposed in the cab and switches a condition of turning-on of the approach permission indicator light by the external operation controller, and
the external operation controller is configured to always turn off the approach permission indicator light when the information collected into the machine controller is information about attended operation in which the operator rides in the cab and executes operation of the construction machine and is information resulting from operation of the turn-on condition changeover switch.
8 . The construction machine according to claim 1 , wherein
the construction machine includes a turn-on condition changeover switch that is disposed in the cab and switches a condition of turning-on of the approach permission indicator light by the external operation controller, and
the external operation controller is configured to always turn off the approach permission indicator light and always turn on the operation indicator light when the information collected into the machine controller is information about attended operation in which the operator rides in the cab and executes operation of the construction machine and is information resulting from operation of the turn-on condition changeover switch.