| 摘要 |
PROBLEM TO BE SOLVED: To improve selection performance by providing a step with a prescribed fall in a selection passage of a chaff sieve. SOLUTION: The threshing apparatus comprises a transport shelf (30), a first chaff sieve (31) installed in such a manner as to follow the terminal end of the transport shelf, a first straw rack (32) continuing into the terminal end of the first chaff sieve, a second chaff sieve (33) for carrying out selection treatment below the first straw rack while receiving a treated product screened out therefrom to send the product backward, a third chaff sieve (34) continuing into the terminal end of the second chaff sieve, and a second straw rack (35) continuing into the terminal end of the third chaff sieve. The first and second steps (A) and (B) with the prescribed falls are formed between the first and second chaff sieves (31) and (33), and between the second and third chaff sieves (33) and (34), respectively. COPYRIGHT: (C)2008,JPO&INPIT
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