PROBLEM TO BE SOLVED: To provide an agricultural working car which is easily returned to a former direction of travel even when the working car is shifted on either left or right side with respect to the direction of travel.SOLUTION: An agricultural working car is provided with an engine-driven drive wheel 9 at the front side of a frame 2 and a groove-cutting body 16 at the rear side of the frame 2, the groove-cutting body 16 being provided obliquely relative to the longitudinal direction and having side plates 19, 19 which are side surface parts with interval therebetween increasing toward the rear side. The groove-cutting body 16 is rotatably connected to the frame 2 by a vertical shaft part 56 in the vertical direction, and the groove-cutting body 16 is connected to the frame 2 by the vertical shaft part 56 so that it is laterally movable at the front side. Thus, when the working car is receives a force directed either left or right side according to the condition of a field, the front side of the groove-cutting body 16 is directed to either left or right side about the vertical shaft part 56 of the rear side, a force directing the working car 1 to the other side in the lateral direction by the groove-cutting body 16 directed either left or right side is generated, and the working car 1 can be returned straightly.COPYRIGHT: (C)2015,JPO&INPIT【課題】作業車の向きが進行方向に対して左右一側にずれても、元の進行方向の戻し易い農業用作業車を提供する。【解決手段】フレーム2の前側にエンジン駆動の駆動輪9を設け、フレーム2の後側に溝切体16を設け、この溝切体16が前後方向に対して斜設され後側に向って間隔が広がる側面部たる側板19,19を有する農。溝切体16を縦方向の縦軸部56によりフレーム2に回動可能に連結すると共に、縦軸部56より前側において溝切体16を左右方向移動可能にフレーム2に連結したから、圃場の条件により、作業車が左右一側に向かう力を受けると、後方の縦軸部56を中心に溝切体16の前側が左右方向一側に向き、この一側に向いた溝切体16により作業車1の向きを左右方向他側に向ける力が発生し、作業車1を真直ぐに戻すことができる。【選択図】図1
