PROBLEM TO BE SOLVED: To solve the problems that the processing time of a material to be processed for grain recovery by deviation of the material to be processed on a swinging selection shelf is prolonged and the swinging selection shelf increases in length.SOLUTION: The swinging selection shelf 20 includes a sieve 23 in which a plurality of fins 37 for separating grain from waste straws, etc., are arranged in parallel in a swinging direction and the sieve 23 is formed of a front sieve 26 and a rear sieve 27 at the rear side of the front sieve 26. At least the front sieve 26 is equipped with moving members 40 for front side diffusion, reciprocating right and left, the rear end parts of the moving members 40 for front diffusion are arranged facing the front end part of the rear sieve 27, at least the left side faces of slide contact parts 41 between the moving members 40 for front diffusion and the fins 37 are equipped with raking plate parts 43 projecting laterally and the raking plate parts 43 are equipped with upper inclined surfaces 44 highest at the sides of the slide contact parts 41 and lowered toward the left side in a plan view and side inclined edges 45 widest at the front side and narrowed toward the rear side in a plan view.COPYRIGHT: (C)2012,JPO&INPIT【課題】揺動選別棚上の被処理物の偏りによる穀粒回収の被処理物の処理時間の長期化。揺動選別棚の長さが長くなるという課題がある。【解決手段】揺動選別棚20には穀粒と藁屑等とを選別するフィン37を揺動方向に複数並設したシーブ23を設け、該シーブ23は前側シーブ26と、該前側シーブ26の後側の後側シーブ27とにより構成する。少なくとも前側シーブ26には、左右往復移動する前側拡散用移動部材40を設け、該前側拡散用移動部材40の後端部を後側シーブ27の前端部に臨ませて配置し、前側拡散用移動部材40の前記フィン37との摺接部41の少なくとも左側側面には側方に突出する掻き板部43を設け、該掻き板部43に正面視において前記摺接部41側が最も高く左側方に至るに従い低くなる上側傾斜面44と、平面視において前側が最も幅広く後側に至るに従い狭くなる側部傾斜縁45とを設ける。【選択図】図2
