CONSTRUCTION MACHINERY

摘要

A construction machine which is less vulnerable to theft compared with conventional machines is provided. The system includes an antenna (6) for detecting removal of an engine key (8) after the engine has stopped, an angle detector (35) for detecting a posture of the upper structure, and an anti-theft unit (31) for forcing the engine to stop and outputting an alarm signal in cases the upper structure is not in a given posture when parked.