PROBLEM TO BE SOLVED: To provide a grain discharging apparatus of a combine harvester in which a cleaning port is enlarged evading the strength loss of an auger vertical tube, and the workability of the cleaning and the inspection in the auger vertical tube is improved.SOLUTION: The grain discharging apparatus of combine harvester is characterized as follows. In the combine harvester 1 which 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, when a cleaning port 9a is formed at a portion of the circumference of the auger vertical tube 9 and an attaching and detaching cover 20 covering the cleaning port 9a is provided, a reinforcing member 24 is provided for the right and left both side parts of the cleaning port forming position in the circumference of the auger vertical tube 9, and the top and bottom length of the reinforcing member 24 is lengthened longer than the top and bottom length of the cleaning port 9a.COPYRIGHT: (C)2013,JPO&INPIT【課題】オーガ縦筒の強度低下を回避しつつ清掃口を大きくし、オーガ縦筒内の清掃や点検を行う際の作業性を向上させる。【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とを備えるコンバイン1において、オーガ縦筒9の外周の一部に清掃口9aを形成し、該清掃口9aを覆う着脱カバー20を設けるにあたり、オーガ縦筒9の外周における清掃口形成位置の左右両側部に、補強部材24を設けると共に、該補強部材24の上下長を清掃口9aの上下長よりも長くする。【選択図】図5
