PROBLEM TO BE SOLVED: To provide a grain dispensing apparatus of a combine harvester having a compact-sized discharging port of the grain dispensing apparatus and its surroundings by reducing the size of a shutter driving device placed at the discharging port.SOLUTION: The shutter driving device 5 is constructed of an opening and closing electric motor 50 as a driving force source, and an operation mechanism 6 to open and close the shutter 46 by transmitting the driving force of the opening and closing electric motor 50 to the shutter 46. The operation mechanism 6 is provided with a rotary cam 60 driven by the rotation driving force of the opening and closing electric motor 50, the rotary cam 60 is rotated to form a transfer orbit along a lateral shaft of the shutter 46, and the shutter 46 is driven by sliding contact with the cam surface of the rotary cam 60.COPYRIGHT: (C)2011,JPO&INPIT【課題】吐出口に備えたシャッタ駆動装置を小型化して、穀粒搬出装置の吐出口周辺をコンパクトに構成したコンバインの穀粒搬出装置を提供する。【解決手段】シャッタ駆動装置5を、動力源となる開閉用電動モータ50と、その開閉用電動モータ50の駆動力をシャッタ46に伝えてシャッタ46を開閉作動させる操作機構6とで構成し、操作機構6は、開閉用電動モータ50の回転駆動力が伝えられる回転カム60を備えるとともに、その回転カム60がシャッタ46の横軸心に沿う方向の移動軌跡を有して回転駆動されるように、かつ、シャッタ46が回転カム60のカム面に摺接して駆動されるように構成した。【選択図】図4
