PROBLEM TO BE SOLVED: To solve the problem that in a constitution in which a combine harvester includes a drop regulation means for regulating the lowest drop position of a reaping apparatus or in a constitution to reduce the ground contact pressure of the reaping apparatus, the reaping apparatus may be brought into contact with a field.SOLUTION: The combine harvester includes a travel device 2 below a machine frame 1, a thresher 3 on the upper one side of the machine frame and the reaping apparatus 4 in front, which is supported vertically rotatably by a reaping support frame 16 and lifted and lowered by a reaping vertical cylinder 19. The combine harvester has an auxiliary urging means 20 that assists an upper evacuation of the reaping apparatus 4 when the reaping apparatus 4 is urged to a rising side and a sledge body 8B mounted on the lower part of the reaping apparatus 4 is pushed up by the projection of a farm field, separately from the reaping vertical cylinder 19, and the drop regulation means 30 for regulating the lowest drop position of the reaping apparatus 4. The lowest drop regulation position by the drop regulation means 30 is changeable.COPYRIGHT: (C)2012,JPO&INPIT【課題】刈取装置の最下降位置を規制する下降規制手段を設けた構成または刈取装置の接地圧を軽減する構成では、刈取装置が圃場に接触することがある。【解決手段】機体フレーム1の下方に走行装置2を、上方一側に脱穀装置3を、前方に刈取支持フレーム16により上下回動自在に支持して刈取上下シリンダ19により昇降する刈取装置4を設ける。前記刈取上下シリンダ19とは別に刈取装置4を上昇側に付勢して該刈取装置4の下部に設けた橇体8Bが圃場面の凸部で突き上げられた際の刈取装置4の上方退避を補助する補助付勢手段20を設け、前記刈取装置4の最下降位置を規制する下降規制手段30を設けると共に、該下降規制手段30による最下降規制位置を変更可能に構成したことを特徴とするコンバイン。【選択図】図2
