PROBLEM TO BE SOLVED: To provide a combine harvester enabling a raking part to be easily made to ascend or descend, with a low-cost construction.SOLUTION: The combine harvester comprises: an ascendingly and descendingly operative part 30 installed at a steering section 8 and capable of winding a wire 20 connected to a support part 12 and capable of ascendingly operating a raking part 3 an impelling mechanism 13 imparting the support part 12 with ascendingly impelling force in the direction of making the raking part 3 ascend and a height-adjusting mechanism 36 impelled so as to be fastened on the ascendingly and descendingly operative part 30, fastenable on the ascendingly and descendingly operative part 30 at a plurality of points along the rotating direction and also capable of making an unfastening operation, and when fastened on the ascendingly and descendingly operative part 30, permitting the rotation of the ascendingly and descendingly operative part 30 in the direction of the raking part 3s ascending and inhibiting the rotation of the ascendingly and descendingly operative part 30 in the direction of the raking part 3s descending. In this combine harvester, the ascendingly impelling force is set so that the force around the swing axis P acting on the support part 12 based on the ascendingly impelling force is made smaller than the force around the swing axis P acting on the support part 12 based on the dead weight of the raking part 3.COPYRIGHT: (C)2012,JPO&INPIT【課題】簡易かつ低コストな構成で掻き込み部を昇降させられるコンバインを提供する。【解決手段】運転部8に配設され、手動回転操作によって支持部12に連係されたワイヤ20を巻き取り、掻き込み部3を上昇操作可能な昇降操作部30と、掻き込み部3を上昇させる方向の上昇付勢力を支持部12に対して付与する付勢機構13と、昇降操作部30に係止するよう付勢され、回転方向に沿った複数箇所において昇降操作部30に係止可能であると共に、係止を解除する操作が可能であり、昇降操作部30に係止したとき、掻き込み部3が上昇する方向への昇降操作部30の回転を許容し、かつ、掻き込み部3が下降する方向への昇降操作部30の回転を禁止する高さ調節機構36と、を備え、上昇付勢力に基づき支持部12に作用する揺動軸芯P回りの力が、掻き込み部3の自重に基づき支持部12に作用する揺動軸芯P回りの力よりも小さくなるよう、上昇付勢力を設定した。【選択図】図6
