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 includes a control means for controlling opening/closing of the shutter at the grain outlet, and a grain sensor for detecting accumulation of grains at the grain outlet. When the control means detects the switch of the state of a grain discharging device to a discharge stop state, the control means determines whether the grain sensor detects accumulation of grains or not. If the grain sensor detects accumulation of grains, the shutter is retained in the opened state if the grain sensor does not detects accumulation, the state of the shutter is switched to the closed state. While the shutter is retained in the opened state, the control means determines whether the grain sensor detects accumulation of grains again when movement of the grain outlet is detected. If the grain sensor detects accumulation of grains, the shutter is retained in the opened state if the grain sensor does not detect accumulation, the state of the shutter is switched to the closed 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防止する。【解決手段】穀粒排出口のシャッタの開閉を制御する制御手段と穀粒排出口での穀粒の滞留を検出する穀粒センサとを備え、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、穀粒センサが穀粒の滞留を検出しているか否かを判別し、穀粒センサが穀粒の滞留を検出している場合はシャッタを開状態に維持し、滞留を検出していない場合はシャッタを閉状態に切り換え、シャッタを開状態に維持している状態では、制御手段が、穀粒排出口の移動を検知したときに再び穀粒センサが穀粒の滞留を検出しているか否かを判別し、穀粒センサが穀粒の滞留を検出している場合はシャッタを開状態に維持し、滞留を検出していない場合はシャッタを閉状態に切り換えるように構成する。【選択図】図8
