PROBLEM TO BE SOLVED: To reduce the nonuniformity of the layer thickness of tailings on a shaking screen, and to improve the separation accuracy.SOLUTION: In a thresher, a threshing port (12) is formed in one lateral part of a threshing chamber (2) in which a threshing cylinder (9) is pivotally installed, and the starting end of a dust exhausting chamber (25) to which a dust exhausting cylinder (24) is pivotally installed is connected through a connection port (26) at the rear part on the other side of the threshing chamber (2). In front of the dust exhausting chamber (25), the trailing return chamber (34) to which the trailing return cylinder (28) driven coaxially with the dust exhausting cylinder (24) is pivotally installed is equipped. A shaking screen (44) is installed under the threshing chamber (2), the dust exhausting chamber (25) and the trailing return chamber (34). In the thresher, a fan (40) driven and working together with the trailing return cylinder (28) is installed at the terminal end of the trailing return chamber (34) in the direction of transferring the tailings. The intake port (39) of the fan (40) faces the inside of the trailing return chamber (34) and the exhaust port (43) of the fan (40) faces the starting end of the shaking screen (44).COPYRIGHT: (C)2013,JPO&INPIT【課題】揺動選別棚上の被処理物の層厚の偏りを少なくし、選別精度を高める。【解決手段】扱胴(9)を軸架した扱室(2)の一側部に扱口(12)を形成し、扱室(2)の他側後部には排塵処理胴(24)を軸架した排塵処理室(25)の始端部を連通口(26)を介して連通し、排塵処理室(25)の前側には排塵処理胴(24)と同軸で駆動される二番処理胴(28)を軸架した二番処理室(34)を設け、扱室(2)と排塵処理室(25)と二番処理室(34)の下方に揺動選別棚(44)を設けた脱穀装置において、二番処理室(34)の被処理物移送方向終端部に、二番処理胴(28)に連動して駆動するファン(40)を設け、ファン(40)の吸気口(39)を二番処理室(34)内に臨ませ、該ファン(40)の排気口(43)を揺動選別棚(44)の始端部に臨ませる。【選択図】 図2
