PROBLEM TO BE SOLVED: To provide a combine harvester equipped with a pressurized air fan for sending transporting air to the side of the transportation starting end of a lower conveyor, and having a simple structure capable of efficiently unloading residual grains with the transporting air.SOLUTION: Shutter members 82 are installed in an umbrella body 81, and are capable of selectively assuming a blocked state for separating the inner space of a grain tank 6 into a conveyor region A1 where the lower conveyor 74 is housed, and a body region A2 above the conveyor region A1, and an opened state for permitting the flow of the grains from the body region A2 to the conveyor region A1 in cooperation with the umbrella body 81. The controller 90 performs control so as to drive the pressurized air fan 77 and keep the shutter members 82 in the blocked state when the transporting air is sent from the side of the transportation starting end of the lower conveyor 74 toward the side of the transportation terminal end thereof.COPYRIGHT: (C)2010,JPO&INPIT【課題】下部コンベアの搬送始端側に搬送風を送風する圧風ファンを有するコンバインであって、前記搬送風によって残留穀粒を効率的に排出し得る構造簡単なコンバインを提供する。【解決手段】傘体81に設けられたシャッタ部材82は、傘体81との共働下にグレンタンク6の内部空間を下部コンベア74が収容されるコンベア領域A1及びコンベア領域A1より上方の本体領域A2に分離する遮蔽状態と、本体領域A2からコンベア領域A1への穀粒の流れを許容する開放状態とを選択的にとり得る。そして、前記制御装置90は、圧風ファン77を駆動させ、搬送風を下部コンベア74の搬送始端側から搬送終端側へ送風する際にはシャッタ部材82を遮蔽状態とさせるように制御する。【選択図】図4
