PROBLEM TO BE SOLVED: To control fluctuation in the timing of driving a working machine downward in the case that the working machine in a lifted state after a finish of turning is set to be automatically driven downward to the ground surface, in a lifting structure for the work machine of a working vehicle.SOLUTION: The working vehicle is provided with: a turn start deciding means for deciding a machine body starts turning a traveling distance detecting means for continuously detecting traveling distance E of the machine body turning after it is decided, with the turn start deciding means, that the machine body starts turning and an automatic lift down means for driving the working machine in lift-upped state downward to the ground surface when the travel distance E of the machine body, detected with the traveling distance detecting means, reaches to a given distance E1.COPYRIGHT: (C)2011,JPO&INPIT【課題】作業車の作業装置昇降構造において、旋回の終了に伴って上昇状態の作業装置が地面まで自動的に下降駆動されるように構成した場合、作業装置が下降駆動されるタイミングのばらつきを抑える。【解決手段】機体が旋回を開始したと判断する旋回開始判断手段と、旋回開始判断手段により機体が旋回を開始したと判断されてからの旋回中の機体の走行距離Eを連続的に検出する走行距離検出手段とを備える。走行距離検出手段により検出された機体の走行距離Eが設定距離E1に達すると、上昇状態の作業装置を地面まで自動的に下降駆動させる自動下降手段を備える。【選択図】図5
