Job device attitude alteration structure null of job

摘要

PURPOSE: To provide the structure equipped with an actuator for changing and operating an attitude of a working device, constituted in such a way that the actuator is operated and handled so as to make a detected value coincident with an objective value, capable of returning the attitude of the working device to its original state with a slight shock. ;CONSTITUTION: A working device is supported on a machine body so that the attitude of the working device is freely changed and an attitude changing structure for working device is equipped with an actuator for changing and operating the attitude of the working device and an attitude sensor for detecting the attitude. Dead zones B1 and B2 are set at one side and the other with a set objective valve A between. The objective structure is provided with a first controlling means for operating and handling the actuator so as to make a detected value C of the attitude sensor coincident with the objective value A when the detected value C of the attitude sensor comes outside from the dead zones B1 and B2 and with a second controlling means for setting the operation speed of the actuator by the first controlling means based on a value D2 obtained by subtracting the dead zone B1 at the side of the detected value C coming out of the dead zone from a difference D1 between the objective valve A and the detected value C when the detected value C of the attitude sensor comes outside from the dead zones B1 and B2.;COPYRIGHT: (C)1995,JPO