AUTOMATIC TRAVEL SYSTEM FOR WORK VEHICLE

To provide an automatic travel system for work vehicles capable of improving work accuracy of work vehicles achieved by automatic travel without causing a decrease in the yield and deterioration in the work efficiency.SOLUTION: In an automatic travel system for work vehicles, an automatic travel control unit executes first automatic travel control for causing a work vehicle 1 to automatically travel in accordance with a parallel path P1 while the work vehicle 1 is in a working state when it is determined by a condition determination unit that first automatic travel control start condition has been established at a time point at which the work vehicle 1 has reached an entrance region Aa with respect to the parallel path P1 and the automatic travel control unit executes automatic turnback travel control for causing the work vehicle 1 to perform turn back travel through composite operation including forward and backward switching operation and steering operation of the work vehicle 1 so that the first automatic travel control start condition is established when it is determined by the condition determination unit that the first automatic travel control start condition has not been established.SELECTED DRAWING: Figure 7 【課題】収穫量の減少や作業効率の低下などを招くことなく自動走行による作業車両の作業精度を高めることができる作業車両用の自動走行システムを提供する。【解決手段】作業車両用の自動走行システムにおいて、自動走行制御部は、作業車両１が並列経路Ｐ１に対する進入領域Ａａに達した時点において、条件判定部にて第１自動走行制御の開始条件が成立したと判定された場合には、作業車両１を作業状態で並列経路Ｐ１に従って自動走行させる第１自動走行制御を実行し、条件判定部にて第１自動走行制御の開始条件が成立していないと判定された場合には、第１自動走行制御の開始条件が成立するように、作業車両１の前後進切り換え操作とステアリング操作との複合操作で作業車両１を切り返し走行させる自動切り返し走行制御を実行する。【選択図】図７