PROBLEM TO BE SOLVED: To provide a working stage changeover structure for a mobile vehicle, which can automatically resume a work according to the end of a levee turning stroke, immediately after the working run restart of an engine even if the engine is stopped at the levee turning stroke.SOLUTION: In the case of a levee turning stroke, a control device 56 executes a measurement processing based on a command of measurement start command means M and a command of measurement completion command means N. When the measured distance obtained in the measurement processing reaches a control objective distance, a work device is switched from a non-working state to a working state. When a command of engine stop command means R is acquired during the execution of the measurement processing, the measured distance obtained in the measurement processing till the command is acquired is written in a nonvolatile storage device C, and the measurement processing is ended. When the start of an engine 7 is then detected on the basis of the output of an engine start detector S, the measurement processing is resumed, so that the attainment of the control target distance of the measurement distance is determined on the basis of the measured distance obtained in the measurement treatment after the resumption and the measured distance before the command acquirement written in the nonvolatile storage device C.COPYRIGHT: (C)2014,JPO&INPIT【課題】畦際旋回行程でエンジン停止させても、エンジン再始動の作業走行再開直後から、畦際旋回行程の終了に伴って作業を自動的に再開させられるようにする。【解決手段】制御装置56が、畦際旋回行程である場合に、計測開始指令手段Mの指令と計測終了指令手段Nの指令に基づく計測処理を実行し、計測処理で得た計測距離が制御目標距離に到達すると、作業装置を非作業状態から作業状態に切り換え、かつ、計測処理の実行中にエンジン停止指令手段Rの指令を取得すると、その指令を取得するまでの計測処理で得た計測距離を不揮発性記憶装置Cに書き込んで計測処理を終了し、その後、エンジン始動検出器Sの出力に基づいてエンジン7の始動を検知すると、計測処理を再開し、その再開後の計測処理で得た計測距離と、不揮発性記憶装置Cに書き込んだ指令取得前の計測距離とに基づいて、計測距離の制御目標距離への到達を判別するように構成した。【選択図】図6
