PROBLEM TO BE SOLVED: To improve sorting performances by providing a diffusion cleaner for removing adhering matter while diffusing treated objects by the reciprocating swing motion in the lateral direction not only in a first chaff sieve on the upstream side of a dust outlet at the terminal end of a threshing chamber but also in a second chaff sieve on the downstream side of the dust outlet.SOLUTION: The threshing apparatus includes: the first chaff sieve (17) with a fixed inclination angle located on the upstream side of the dust outlet (12) at the terminal end of the threshing chamber (2) and the second chaff sieve (18) located on the downstream side of the dust outlet (12) and having a longer sorting stroke than the first chaff sieve (17) on the upstream side. A several number of diffusion cleaners (30), each of which includes a diffusion plate (28) along the longitudinal direction and a sieve scraper (29) in contact with a surface of each sieve (26) for removing adhering matter, are attached to the first and second chaff sieves (17) and (18) in such a way as reciprocatingly swingable in both ways in the lateral direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】扱室終端の排塵口より上手側の第一チャフシーブはもとより、排塵口より下手側の第二チャフシーブにおいても、左右横方向の往復揺動運動によって処理物を拡散しながら付着物を除去する拡散清掃具を設けることによって選別性能の向上を図る。【解決手段】扱室(2)終端の排塵口(12)より上手側に位置する傾斜角度が固定の第一チャフシーブ(17)と、排塵口(12)より下手側に位置し上手側の第一チャフシーブ(17)よりも選別行程が長い第二チャフシーブ(18)を備え、これら第一・第二チャフシーブ(17),(18)には、前後方向に沿う拡散プレート(28)と各シーブ(26)面に接触して付着物を除去するシーブスクレーパ(29)とからなる数個の拡散清掃具(30)を左右横方向に往復揺動可能に備える。【選択図】 図1
