To provide an operation driving device capable of conducting operation avoiding an obstruction in an upper section and also capable of performing operation as a normal two-piece boom type working machine.
A second boom-signal converter 16 obtaining a first speed command value V2a for a second boom cylinder 8 in response to the manipulated value of an operation pedal 12, a second arithmetic device 51 acquiring a second speed command value V2b for the second boom cylinder 8 from the target rotational angular velocity θ of a second boom 4 obtained by multiplying the rotational angular velocity of a first boom 3 by a gain G=-1 by a first arithmetic device 50, and a switch 30 selecting the first speed command value V2a or the second speed command value V2b are installed to the operation driving device for the two-piece boom type working machine. The first speed command value V2a is selected and the second boom 4 is turned in response to the manipulated value of the operation pedal 12 when the switch 30 is not operated, and the second speed command value V2b is selected and the second boom 4 is revolved as if the first boom 3 and the second boom 4 constituted a parallel link when the switch 30 is operated.
OSHINA MORIO
EGAWA EIJI
TSUMURA JUNJI
KAJITA YUSUKE
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