PROBLEM TO BE SOLVED: To solve the problem that the discharged object exhausted from a mud discharge hole deposits into the inside of a machine body.SOLUTION: The grain discharging apparatus of a combine harvester includes: an auger vertical tube 9 erected in the backward of a grain tank 4 an auger horizontal cylinder 10 extending from the upper end of the auger vertical tube 9 to the horizontal direction or diagonally to the upper direction and an auger turning mechanism 11 making the entire of the auger horizontal cylinder 10 and the portion or the whole of the auger vertical tube 9 perform rotation operation by centering on the auger vertical tube 9. In a combine harvester 1 in which the auger horizontal cylinder 10 is made to be free rotation displacement between a storage position going over the upper side of the machine body and a discharge position extending the outside of the machine body, when a mud discharge hole 20a exhausting mud and rubbish adhering to or mixing in grain is disposed at a portion of the circumference of the auger vertical tube 9, the mud discharge hole 20a is arranged to point to the machine body inside direction when the auger horizontal cylinder 10 is in the storage position and point to the machine outside direction when the auger horizontal cylinder 10 is in a given discharge position or a discharge range.COPYRIGHT: (C)2013,JPO&INPIT【課題】泥土排出孔から排出された排出物が機体内側に堆積するという問題を解消する。【解決手段】穀粒タンク4の後方に立設されるオーガ縦筒9と、オーガ縦筒9の上端部から水平方向又は斜め上方向に延出するオーガ横筒10と、オーガ横筒10の全体とオーガ縦筒9の一部又は全体を、オーガ縦筒9を中心として旋回動作させるオーガ旋回機構11とを備え、オーガ横筒10を、機体上方に重なる収納位置と、機体外方に延出する排出位置とに旋回変位自在としたコンバイン1において、オーガ縦筒9の外周の一部に、穀粒に付着又は混入した泥土や屑を排出する泥土排出孔20aを設けるにあたり、該泥土排出孔20aを、オーガ横筒10が収納位置にあるときは機体内側を向き、オーガ横筒10が所定の排出位置又は排出範囲にあるときは機体外側を向くように配置する。【選択図】図10
