LOCUS DEVIATION PREVENTIVE DEVICE OF ARTICULATED ARM WORK MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a locus deviation preventive device of an articulated arm work machine causing no damage of a sheet pile, a pile and an arm even when becoming an overload in locus control of an articulated arm. SOLUTION: Four arms 1 to 4 constitute the articulated arm 130 for controlling a locus, and are driven by hydraulic cylinders 1c to 4c. Pressure sensors 51 to 58 are installed in respective bottom chambers and rod chambers of the hydraulic cylinders 1c and 4c. An overload detecting device 50 outputs a stopping signal to a controller 20 so as to stop the locus control of the hydraulic cylinders 1c to 4c when either pressure of the hydraulic cylinders 1c to 4c detected by the pressure sensors 51 to 58 exceeds upper limit preset pressure.