PROBLEM TO BE SOLVED: To inhibit occurrence of malfunction caused by the switch of the state of a shutter to the closed state with grains accumulating in a grain outlet.SOLUTION: The grain discharging structure of a combine harvester includes the shutter for opening/closing the grain outlet of a grain discharging device in the grain discharging device configured to switch the state to a grain discharge state for discharging grains stored in a grain tank or to a discharge stop state for stopping the discharge of grains. The grain discharging structure further includes a control means for controlling opening/closing of the shutter. When the control means detects the switch of the state of the grain discharging device to the discharge stop state, the control means determines whether a preset condition for closing the shutter is satisfied or not. If the condition for closing the shutter is satisfied, the state of the shutter is switched to the closed state if the condition for closing the shutter is not satisfied, the shutter is retained in the opened state.COPYRIGHT: (C)2012,JPO&INPIT【課題】穀粒排出口で穀粒が滞留している状態でシャッタが閉状態に切り換わることに起因した不具合の発生を抑制する。【解決手段】穀粒タンクに貯留した穀粒を機外に排出する穀粒排出状態と穀粒の排出を停止する排出停止状態とに切り換え可能に構成した穀粒排出装置に、穀粒排出装置の穀粒排出口を開閉するシャッタを備えたコンバインの穀粒排出構造において、シャッタの開閉を制御する制御手段を備え、制御手段が、穀粒排出装置の排出停止状態への切り換えを検知すると、予め設定したシャッタ閉じ操作用の条件が成立したか否かを判別し、シャッタ閉じ操作用の条件が成立した場合はシャッタを閉状態に切り換え、シャッタ閉じ操作用の条件が成立しなかった場合はシャッタを開状態に維持するように構成する。【選択図】図8
