| 摘要 |
PURPOSE:To provide the subject system designed for maintaining proper screening state corresponding to the amount of threshed product from a threshing chamber. CONSTITUTION:The objective system is made up of (A) a rockingly screening device 13 equipped with rockingly screening shelves 2 to receive threshed products having run down from a threshing chamber 1 and to screen grains through their sieving under their rocking conveyance, (B) a sieving mesh regulating means so designed that such screening mesh 3 of the shelves 2 is regulated so as to become larger with the increasing amount of the threshed product, (B) a conveying power regulating means so designed that such conveying power is regulated so as to become larger with the increasing amount of the above product, and (C) a wind power regulating means so designed that screening wind power by a winnower 29 is regulated so as to become larger with the increasing amount of the above product. The above-mentioned elements A, B and C are controllable in a mutually associated way. |
