PROBLEM TO BE SOLVED: To reduce catching sorting objects accumulated between side walls arranged on both right/left side parts of an oscillation sorting device and a cleaning tool and thereby to prevent damage of the side walls of the oscillation sorting device, the cleaning tool, and a drive part reciprocating/moving the cleaning tool, etc.SOLUTION: The thresher includes: fixed sieves 26 arranged on a chaff sieve 17 of an oscillation sorting device 15 and disposed side by side at predetermined intervals in a front/rear direction a plurality of cleaning tools 30 removing a sorting object adhered on the fixed sieve 26 and arranged side by side at predetermined intervals in a right/left direction a drive part 34 reciprocating/moving the plurality of cleaning tools 30 integrally in the right/left direction and a control device 50 rotating an output shaft of the drive part 34 in a normal rotation direction when an electric current value supplied to the drive part 34 is within a predetermined range, whereas rotating the output shaft of the drive part 34 in a reverse rotation direction when the electric current value supplied to the drive part 34 becomes larger than the predetermined range.SELECTED DRAWING: Figure 14COPYRIGHT: (C)2017,JPO&INPIT【課題】揺動選別装置の左右の両側部に設けられた側壁と清掃具の間に堆積した選別物の挟み込みを軽減し、揺動選別装置の側壁、清掃具、清掃具を往復移動させる駆動部等の破損を防止する。【解決手段】揺動選別装置(15)のチャフシーブ(17)に、前後方向に所定の間隔を隔てて並設された固定シーブ(26)を備え、固定シーブ(26)に付着した選別物を除去する複数の清掃具(30)を左右方向に所定の間隔を隔てて並設し、複数の清掃具(30)を一体的に左右方向に往復移動させる駆動部(34)を設け、駆動部(34)に供給される電流値が所定範囲内の場合は、駆動部(34)の出力軸を正転方向に回転させ、駆動部(34)に供給される電流値が所定範囲よりも大きくなった場合には、駆動部(34)の出力軸を逆転方向に回転させる制御装置(50)を設ける。【選択図】図14
