PROBLEM TO BE SOLVED: To provide a threshing device which promotes falling of treated objects and decreases unthreshed objects.SOLUTION: In the threshing device 100 where a threshing cylinder 41 with threshing teeth 41a implanted on its outer peripheral surface is laid across in an anteroposterior direction, and a threshing concave 10 is arranged around a lower part of the threshing cylinder 41, drawing holes 12 in a back part 10b of the threshing concave 10 are composed to have a larger opening area than drawing holes 11 of a front part 10a, the drawing hole 11 in the front part 10a of the threshing concave 10 is formed in a square, and the drawing hole 12 in the back part 10b of the threshing concave 10 is formed in a rectangle of which a longitudinal direction is the anteroposterior direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】処理物の漏下を促進させつつ、扱ぎ残しを低減することができる脱穀装置を提供する。【解決手段】外周面に扱歯41a・41a・・・が植設された扱胴41を前後方向に横架し、該扱胴41の下方周囲に受網10を配置した脱穀装置100において、前記受網10の後部10bの抜孔12・12・・・は、前部10aの抜孔11・11・・・よりも開口面積が大きく構成され、前記受網10の前部10aの抜孔11・11・・・を正方形状に形成して、前記受網10の後部10bの抜孔12・12・・・を前後方向を長手方向とする長方形状に形成した。【選択図】図6
