PROBLEM TO BE SOLVED: To provide a work vehicle capable of securing safety by coping with an abnormality such an excessive load generated during straight advance work travel by automatic straight advance control.SOLUTION: A work vehicle is constituted so that straight advance work travel can be performed by including a mover part by an internal combustion engine, a steering device for adjusting a travel direction of a machine body corresponding to operation, and a control device for straight fixing the steering device by straight control, in which the control device takes the case where detection rotation speed of the mover part is below a prescribed value as a suspending reason, and suspends straight control in the range until dissolution of the suspending reason, to thereby secure safety of the straight advance work travel.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】自動直進制御による直進作業走行の際に発生する過大な負荷等の異常に対処して安全を確保しうる作業車両の提供。【解決手段】作業車両は、内燃機関による原動部と、操作に応じて機体の走行方向を調節する操舵装置と、この操舵装置を直進制御によって直進固定する制御装置とを備えて直進作業走行可能に構成され、前記制御装置は、前記原動部の検出回転速度が所定値以下の場合を中断事由としてこの中断事由の解消までの範囲で前記直進制御を停止することにより、直進作業走行の安全確保を可能とする。【選択図】図３
