| 摘要 |
PURPOSE:To avoid the deterioration of the working efficiency of a work truck by controlling the truck body so that it has no big shift from a work subject even in case the truck body has a shift from a proper position in the width direction of the truck body after a turn. CONSTITUTION:A solenoid valve 14 is actuated to turn the truck body to the left and one of two copying sensors S1 and S2 is turned on for start of the reaping control. Thus the drive of a left crawler driver 4L is stopped for a prescribed time t1 in case a root sensor S0 is not turned on before a work truck travels a set distance Le from start of its forward movement after a reaping part 2 is moved down. The truck body is turned repetitively until the sensor S1 or S2 is turned on in case it is not turned on after a turn of the truck body.
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