PROBLEM TO BE SOLVED: To remove free grain over rack from threshed waste straw to prevent the grain from being discharged with the waste straw to the outside of a machine.SOLUTION: This thresher includes a threshing chamber (6) having a threshing drum (7a), and a dust discharging chamber (10) having a dust discharging drum (11a). The rear end of the threshing drum (7a) is projected backward from the rear end of a threshing net (7c), and the rear end side of a threshing drum shaft (7) supporting the threshing drum (7a) is journaled to a threshing chamber rear plate (6b). The front side of a threshing chamber internal rear plate (6d) provided at a rear part in the threshing chamber (6) is formed with a supply port (6e) for supplying threshed discharge dust in the threshing chamber (6) to the dust discharging chamber (10), and a free grain over rack collecting part (B) narrower in longitudinal width than the supply port (6e) is formed between the threshing chamber rear plate (6b) and the threshing chamber internal rear plate (6d). A plate-like member (9a) for partitioning the threshing chamber (7a) from the dust discharging drum (11a) is provided in the free grain over rack collecting part (B).COPYRIGHT: (C)2012,JPO&INPIT【課題】脱穀後の排藁からささり粒を除去し、穀粒が排藁と共に機外へ排出されることを防止する。【解決手段】扱胴(7a)を有した扱室(6)と排塵胴(11a)を有した排塵処理室(10)を備え、扱胴(7a)の後端部を扱網(7c)の後端部よりも後方へ突出させ、扱胴(7a)を支持する扱胴軸(7)の後端部側を扱室後板(6b)に軸支し、扱室(6)内の後部に設けた扱室中後板(6d)の前側に、扱室(6)内の脱穀排塵物を排塵処理室(10)へ供給する供給口(6e)を形成し、扱室後板(6b)と扱室中後板(6d)との間に、供給口(6e)よりも前後方向の幅が狭いささり粒回収部(ロ)を形成し、ささり粒回収部(ロ)において扱胴(7a)と排塵胴(11a)との間を仕切る板状部材(9a)を設ける。【選択図】図2
