THRESHING MACHINE

PROBLEM TO BE SOLVED: To provide a threshing machine having a blow fan capable of efficiently changing the blow volume by a simple structure and efficiently carrying out blow air adjustment corresponding to the state of fresh materials, etc. which produce a large amount of threshed straw and dust by adjusting the gap between the upper wall part of a fan case and blades of a rotating blade body. SOLUTION: In the threshing machine 1, a swing sorting body 7 which receives threshing materials and subject them to swing sorting is provided below a treating room 2, and the blow fan 5 supplies sorting wind in the swing sorting direction of the swing sorting body 7 from a blowing opening 35 of the fan case 26 housing the rotation blade body 30. The upper wall part 32 of the fan case 26 that is in the blowing opening 35 side is provided so as to be vertically rotatable on a pivot shaft 41, which is positioned in the downstream side of the rotation direction of the rotation blade body 30. The gap between the upper wall part 32 and the blades 29 of the rotation blade body 30 is adjusted. Thus, the blow volume can be changed. COPYRIGHT: (C)2010,JPO&INPIT