PROBLEM TO BE SOLVED: To improve cleaning efficiency without impairing cleaning performance of the cleaning device for a sieve.SOLUTION: The problem is solved by a threshing unit 3 including a threshing chamber 11 incorporated with a threshing cylinder 10, and a sieve 23 reciprocatingly swinging in a back and forth direction for carrying out swinging selection of an object to be threshed leaked from the threshing chamber 11 and configures such that a first cleaning body 100 and a second cleaning body 200 for reciprocatingly swinging in a right and left direction on the sieve 23 are parallely arranged in a right and left direction of the sieve 23 so that the first cleaning body 100 is relatively positioned on a grain stalk contact starting side of the threshing cylinder 10 and the second cleaning body 200 is relatively positioned on a grain stalk contact finishing side if the threshing cylinder 10, and a speed of reciprocating swing of the second cleaning body 200 is faster than the speed of reciprocating swing of the first cleaning body 100.COPYRIGHT: (C)2012,JPO&INPIT【課題】シーブの清掃装置における清掃性能を損ねずに、清掃効率を向上する。【解決手段】上記課題は、扱胴10を内蔵する扱室11と、この扱室11から漏下する脱穀処理物の揺動選別を行うべく前後方向に往復揺動するシーブ23とを備え、シーブ23上を左右方向に往復揺動する第一清掃体100及び第二清掃体200を、相対的に第一清掃体100が扱胴10の穀稈接触開始側に位置し第二清掃体200が扱胴10の穀稈接触終了側に位置するようにシーブ23の左右方向に並設するとともに、第一清掃体100の往復揺動速度よりも第二清掃体200の往復揺動速度が速い構成としたことを特徴とする脱穀装置3により解決される。【選択図】図7
