PROBLEM TO BE SOLVED: To prevent occurrence of trouble due to changeover of a shutter to a closed state in a state in which grains stay in a grain discharge port.SOLUTION: A grain discharge device is configured to allow the changeover between a grain discharge state for discharging grains stored in a grain tank to the outside of the machine and a discharge stopped state in which the discharge of the grains is stopped. A grain discharge structure of a combine harvester is provided with the shutter 28 for opening and closing the grain discharge port 26 of a grain discharge device. Furthermore, the grain discharge structure is provided with a control means 40 for controlling the opening and closing of the shutter 28 and an artificially operating type command means A for commanding the shutter 28 to change over to the closed state. The control means 40 is configured to change over the shutter 28 to the closed state when the control means 40 receives the command from the command means A after the control means 40 detects the changeover of the grain discharge device to the discharge stopped state.COPYRIGHT: (C)2012,JPO&INPIT【課題】穀粒排出口に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26を開閉するシャッタ28を備えたコンバインの穀粒排出構造において、シャッタ28の開閉を制御する制御手段40と、制御手段40にシャッタ28の閉状態への切り換えを指令する人為操作式の指令手段Aとを備え、制御手段40が、穀粒排出装置の排出停止状態への切り換えを検知した後に指令手段Aからの指令を受けると、シャッタ28を閉状態に切り換えるように構成してある。【選択図】図7
