PROBLEM TO BE SOLVED: To reduce loss outside a machine by reducing loss of the fourth grain in a threshing device.SOLUTION: The threshing device is equipped with a threshing chamber (15) in which a threshing drum (18) having a large number of threshing teeth (19) is supported through a shaft, a discharge dust treating chamber (17) and a feed chain (20b) for conveying cereal stems to a threshing port (21) opened on the side of the threshing chamber (15). In the threshing device, a free grain over rack-recovery chamber (56) for recovering free grain over rack by the threshing teeth (19) on the rear end of the threshing drum (18) is formed at a position in the rear side from a communication port (23) for communicating the threshing chamber (15) with the discharge dust treating chamber (17) and a partition board (55) for partitioning between the threshing chamber(15) and the grain recovery chamber (56) is installed to range from a region above the threshing drum (18) to a region on the side of the threshing port (21). The partition board (55) is formed to be divided into an upper partition board (55a) on the side of a threshing drum cover (43) and a lower partition board (55b) on the side of the threshing port (21).COPYRIGHT: (C)2012,JPO&INPIT【課題】脱穀装置における四番ロスを減少させ、機外損失を低減する。【解決手段】多数の扱歯(19)を有する扱胴(18)を軸架した扱室(15)と排塵処理室(17)とを備え、扱室(15)の横側に開口した扱口(21)に穀稈搬送用のフィードチェン(20b)を備えた脱穀装置において、扱室(15)と排塵処理室(17)とを連通する連通口(23)よりも後側の部位に、扱胴(18)後端部の扱歯(19)によってささり粒を回収するささり粒回収室(56)を形成し、この扱室(15)とささり粒回収室(56)との間を仕切る仕切板(55)を、扱胴(18)上方の部位から扱口(21)側の部位にわたって設ける。また、この仕切板(55)を、扱胴カバー(43)側の上部仕切板(55a)と扱口(21)側の下部仕切板(55b)とに分割して形成する。【選択図】図13
