SCREENING DEVICE OF THRESHER

摘要

PROBLEM TO BE SOLVED: To provide a screening device of a thresher capable of effectively carrying out the screening while reducing a third loss even though the amount of materials to be treated is large. SOLUTION: This screening device of a thresher is installed with a screening lever device 14 the top end of which is located below the rear end of a grain pan 11 and the rear end of which is located above the front end of a chaff sieve 12 and which is located between the grain pan 11 and the chaff sieve 12 of a shaking screening device 10. The screening lever device 14 is constituted of plural sieve lines 14a and falling passages for treated substances arranged between the sieve lines 14a. A second winnower 22 for feeding screening air is installed above the screening lever device 14.