PROBLEM TO BE SOLVED: To prevent reduction in sorting accuracy by increase or decrease of the amount of a material to be treated in a thresher.SOLUTION: The thresher includes such a constitution that as layer thickness of a material to be treated detected by a layer thickness detection means (95) laid on a swinging sorting shelf (20) is increased, the air sending direction of sorting air from a winnower (16) is changed to the rear side of the swinging sorting shelf (20) and a discharge opening (56) is opened and as the layer thickness of the material to be treated detected by the layer thickness detection means (95) is decreased, the air sending direction of the winnower is changed to the front side of the swinging sorting shelf (20) and the discharge opening (56) is closed.COPYRIGHT: (C)2013,JPO&INPIT【課題】脱穀装置において、被処理物量の増減による選別精度低下を防止する。【解決手段】揺動選別棚(20)上に設けた層厚検出手段(95)で検出される被処理物の層厚が増大するほど、唐箕(16)からの選別風の送風方向を揺動選別棚(20)の後寄りに変更するとともに、前記排塵口(56)を開放し、層厚検出手段(95)が検出する被処理物層厚が減少するほど、唐箕の選別風の送風方向を揺動選別棚(20)の前寄りに変更するとともに、前記排塵口(56)を閉鎖する構成とする。【選択図】 図6
