PROBLEM TO BE SOLVED: To provide a sorting device capable of suppressing effectively kinetic inertia resulting from rocking motion of a sieve case with a comparatively simple structure.SOLUTION: A rocking drive mechanism 30 of a sieve case 40 is constituted of an eccentric drive mechanism in which an output transfer spot to the sieve case 40 is positioned eccentrically to the shaft center x1 of a drive shaft 31, and a vibration-damping balance weight 36 for imparting kinematic inertia reverse to the vertical rocking direction of the sieve case 40 is provided in the eccentric drive mechanism, and a flywheel part 37 in which the weight is distributed equally or approximately equally over the whole area in the circumferential direction around the same shaft center as the shaft center x1 of the drive shaft 31 is also provided.COPYRIGHT: (C)2014,JPO&INPIT【課題】比較的簡単な構造でシーブケースの揺動運動に伴う運動慣性を効果的に抑制し得る選別装置を提供する。【解決手段】シーブケース40の揺動駆動機構30が、駆動軸31の軸心x1に対して、シーブケース40への出力伝達箇所が偏心して位置する偏心駆動機構によって構成され、偏心駆動機構に、シーブケース40の上下揺動方向とは逆向きの運動慣性を与える制振用のバランスウェイト36が備えられ、駆動軸31の軸心x1と同一の軸心周りで周方向の全域にわたって均等、又はほぼ均等に重量配分されたフライホイール部37が備えられている。【選択図】図6
