| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for supplying wind for grading in a thresher, having advantage in the respect of the management of parts, assembling and manufacturing cost, or the like, even while avoiding the wind for grading released to a grading part from a rotary blade, from causing an undesirable influence upon the grading treatment at the grading part. SOLUTION: A structure for supplying wind for grading in a thresher has an opening 16 formed in a side outside wall 15 of a winnower case 17 and allows a rotary blade 20 for taking the outside air in from the opening 16 by the rotation around a lateral shaft center P2 and releasing the air to a grading part 9, to be pivotally supported by a supporting member 18 crossing the opening 16. A lid body 18A blocking a part 16A at the discharging side of the opening 16, overlapping with the air-releasing position (a) of the rotary blade 20, is integrally formed on the supporting member 18. Plural attaching holes 18C having different distance from the lateral shaft center P2 are bored in the side edge of the lid body 18A of the supporting member 18.
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