PROBLEM TO BE SOLVED: To adjust blow quantity as well as blow direction in an upper blow passage and a lower blow passage to maintain high sorting performance.SOLUTION: On a blow port (65) composed between a top surface part (67) and a bottom surface part (68) of a winnow (16), a wind crack (66) is provided between the top surface part (67) and the bottom surface part (68) to part the blow port (65) into the upper blow passage (74) and the lower blow passage (75). The top surface part (67) is turnably composed to move the downstream side up and down. The wind crack (66) is turnably composed to move the upstream side and the downstream side up and down, having the turning center in the middle in the blow direction. The top surface part (67) and the wind crack (66) are interlocked to turn in the same rotation direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】上側風路及び下側風路の風向のみならず風量をも調整可能とし、もって選別性能を高く維持できるようにする。【解決手段】唐箕(16)における、天面部(67)と底面部(68)との間で構成される送風口(65)において、天面部(67)と底面部(68)との間に風割(66)を設け、送風口(65)を上側風路(74)と下側風路(75)とに区画し、天面部(67)はその下流側が上下するように回動自在に構成し、風割(66)は回動中心が送風方向中間に位置しており、その上流側及び下流側が上下するように回動自在に構成し、天面部(67)及び風割(66)は、同じ回動方向に連動して回動するようにした。【選択図】図6
