PROBLEM TO BE SOLVED: To reduce damage to side walls of an oscillation sorting device, cleaning tools, or a driving unit and to prevent catching of processed objects in the oscillation sorting device.SOLUTION: Fixed sieves (26) are provided side by side at predetermined intervals in a front-rear direction on a chaff sieve (17) of an oscillation sorting device (15). A plurality of cleaning tools (30) for removing sorted objects adhering to the fixed sieves (26) are disposed side by side at predetermined intervals in a right-left direction. A driving unit (34) for reciprocating the plurality of cleaning tools (30) together in the right-left direction is included. The driving unit (34) is driven at a low first speed when driving load applied on the driving unit (34) exceeds a predetermined load range and the driving unit (34) is driven at a second speed higher than the first speed when the driving load applied on the driving unit (34) is within the predetermined load range.SELECTED DRAWING: Figure 13COPYRIGHT: (C)2017,JPO&INPIT【課題】揺動選別装置の側壁、もしくは清掃具もしくは駆動部等の破損を少なくすると共に、揺動選別装置での処理物の詰まりを防止する。【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有して並設し、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)に掛かる駆動負荷が所定の負荷範囲よりも大きくなった場合は、駆動部(34)を低速の第1速度で駆動させ、駆動部(34)に掛かる駆動負荷が所定の負荷範囲以内の場合には、駆動部(34)を第1速度よりも高速の第2速度で駆動させる。【選択図】 図13
