PROBLEM TO BE SOLVED: To remove free grain over rack from threshed waste straw, so as to prevent of the grain from being discharged outside of a thresher together with the waste straw.;SOLUTION: A supplying hole (6e) is formed between a threshing chamber middle front plate (6c) provided at the rear part in the threshing chamber (6) and a threshing chamber middle rear plate (6d) provided at the rear side of the threshing chamber middle front plate (6c) with a space so that the threshing discharge waste in the threshing chamber (6) is supplied from the inside of the threshing chamber (6) to the inside of a discharge waste treating chamber (10) through the supplying hole (6e), wherein a free grain over rack collecting part (β) is formed between a threshing chamber rear plate (6b) pivoting a rear end side of a threshing cylinder shaft (7) supporting a threshing drum (7a) and the threshing chamber middle rear plate (6d), and configured to remove free grains on the threshed straws by a threshing teeth (7b) on the rear end of the threshing drum (7a) in the free grain over rack collecting part (β) and flow-down them on to a swing selector (25).;COPYRIGHT: (C)2011,JPO&INPIT
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