PURPOSE: To simplify operation processing by providing an operating section adding a turning control signal to forward and backward signals to one crawler and subtracting the turning control signal from the forward and backward signals to the other crawler.
CONSTITUTION: When a traveling lever is inclined in front and rear directions, rotational displacement of the lever is detected by a front and rear inclination detector 11, and a signal X1 is outputted to a traveling controller 13. When the lever is rotated around the axial center, the rotational displacement of the lever is detected by a right and left rotation detector 12, and a signal X2 is outputted to the controller 13. The signals X1 and X2 are levelled with gain adjusting circuit sections 15 and 16, and forward and backward signals X3a and X3b and a turning control signal X5 are outputted. In addition, for the signal X3a to the right crawler, the signal X5 is subtracted in an operation section 17. For the signal X3b to the left crawler, the signal X5 is added in an operation section 18.
SHIMOURA KENICHI
HASHI TAKAAKI
NABCO LTD
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