Electric construction machine

An electric construction machine comprising:

• an automotive lower traveling structure;
• an upper revolving structure mounted on the lower traveling structure to be capable of revolving thereto;
• an electric motor as a power source disposed on the upper revolving structure;
• and
• a cable support device configured to support an intermediate part of a power feeding cable for supplying power from an external power source to the electric motor, wherein
• the cable support device includes:
• a shaft body that is attached on the upper revolving structure in a state where a shaft center of the shaft body extends in an upper-lower direction;
• an arm member that is attached on the shaft body to be rotatable about the shaft center and grips the power feeding cable on the tip end side;
• and
• a locking mechanism disposed to be removable between the shaft body and the arm member to prohibit rotation of the arm member relative to the shaft body, wherein
• a stopper disposed between the shaft body and the arm member to automatically stop the arm member rotating relative to the shaft body in a predetermined position;
• the arm member comprises a cylindrical part rotatably fitted in the shaft body;
• and
• the stopper includes:
• a shaft body side stopper hole that opens to an outer peripheral surface of the shaft body and extends in a radial direction of the shaft body;
• an arm side stopper hole that is disposed in the cylindrical part and corresponds to the shaft body side stopper hole by rotation of the cylindrical part relative to the shaft body;
• an engaging pin disposed to be movable within the shaft body side stopper hole;
• and
• a pin urging member for urging the engaging pin in a direction of projecting from the shaft body side stopper hole, the pin urging member engaging the engaging pin with the arm side stopper hole when the arm side stopper hole corresponds to the shaft body side stopper hole.