| 摘要 |
PROBLEM TO BE SOLVED: To efficiently treatment second grain and delivered dust by using a front and rear treatment cylindrical chamber. SOLUTION: In this thresher equipped with a threshing chamber 4 and the treatment cylindrical chamber 6 side by side at the upper side of a separation chamber 2, the treatment cylindrical chamber 6 has a front treatment cylindrical chamber 61 and a rear treatment cylindrical chamber 63 . The transportation end side of a second grain return screw 16 is made to communicate with the front treatment cylindrical chamber 61 , delivered dust from a delivered dust opening 7 attached to the rear part of the threshing chamber 4 is supplied to the rear treatment cylindrical chamber 63 . The scale of mesh of the leakage body 131 of the front treatment cylindrical chamber 61 is made smaller than that of the leakage body 133 of the rear treatment cylindrical chamber 63 .
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