PROBLEM TO BE SOLVED: To solve the problems that selection ability and selection efficiency are reduced when turning a machine body because the air flow of a winnower is reduced.SOLUTION: The combine harvester includes a first transmission-switching means 29 for connecting or disconnecting the transmission of driving force of an engine to a reaping apparatus 4, and a second transmission-switching means 57 for connecting or disconnecting the transmission of the driving force to a grain culm-conveyor 13 for feeding reaped grain culms to a threshing apparatus 3. A changing means 59 for changing the direction of the air flow of the winnower 19 is installed in the threshing apparatus 3. The first transmission-switching means 29 and the second transmission-switching means 57 are switched to transmission-disconnection states so as to correspond to the lift of the reaping apparatus 4 to a non-operation height, and the air flow from the winnower 19 is directed to the site at the upstream side in the conveying direction of a material to be treated in a swinging selection shelf 22 by operating the changing means 59.COPYRIGHT: (C)2013,JPO&INPIT【課題】機体回行時に、唐箕の風量を減少させるため、選別性能および選別効率が低下するという課題がある。【解決手段】刈取装置4へのエンジン駆動力の伝動を接続および遮断する第一伝動切替手段29と、刈取穀稈を脱穀装置3に供給する穀稈供給搬送装置13への駆動力の伝動を接続および遮断する第二伝動切替手段57とを備え、前記脱穀装置3には唐箕19の送風方向を変更する変更手段59を設け、前記刈取装置4の非作業高さへの上昇に関連して、第一伝動切替手段29と第二伝動切替手段57を伝動遮断状態に切り替えると共に、前記変更手段59を作動して唐箕19からの送風を前記揺動選別棚22における被処理物移送方向の上手側の部位に向かわせる構成としたことを特徴とするコンバイン。【選択図】図2
