| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in which screening state in a machine of a thresher can correctly not be determined by only conventional detection means and screening defects occur or loss to the outside of the machine due to third scattering, etc., often occurs. SOLUTION: This screening control device of a threshing apparatus is constituted by installing a grain sensor 3 in a grain tank 2 and respectively installing a grain culm sensor 4 for detecting grain culm amount, a second sensor 6 for detecting reducing amount to a second treating chamber 5 and a layer pressure sensor 8 for detecting a material to be screened which flows on an shaking and screening shelf 7 in the threshing apparatus 1 and providing a control means 11 for adjusting and controlling screening interval of a chaff sieve 9 based on detection information of the above sensor and screening air amount of a winnower 10.
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