PROBLEM TO BE SOLVED: To improve threshing efficiency of a thresher and to make easy exchange of threshing teeth worn out by threshing work.SOLUTION: A threshing cylinder (19) is held on a shaft in a threshing chamber (15), plural threshing teeth (42) are stood on an outer peripheral surface of the threshing cylinder (19), an exhaust hole (38) exhausting exhausted dust outside is set at a rear part of the threshing chamber (15), and on the plural threshing teeth (42), chip point parts far from the axis of the threshing cylinder (19) against a base near the axis of the threshing cylinder (19) have a sweepback deflected to the rotation direction upper side of the threshing cylinder (19), and the sweepback of the plural threshing teeth (42) of the threshing cylinder (19) rear end part facing to the exhaust hole (38) is set larger than the sweepback of other threshing teeth (42).COPYRIGHT: (C)2014,JPO&INPIT【課題】本発明は、脱穀装置の脱粒効率を高めるとともに、脱穀作業によって磨耗した扱歯の交換を容易化することを課題とする。【解決手段】扱胴(19)を扱室(15)内に軸架し、扱胴(19)の外周面には多数の扱歯(42)を立設し、扱室(15)の後部に、排塵物を外部へ排出する排出口(38)を備え、多数の扱歯(42)には、扱胴(19)の軸心に近い基部に対して扱胴(19)の軸心から遠い先端部が扱胴(19)の回転方向上手側に偏倚する後退角度を有し、排出口(38)に臨む扱胴(19)後端部の扱歯(42)の後退角度を、他の扱歯(42)の後退角度よりも大きく設定する。【選択図】図2
