PROBLEM TO BE SOLVED: To provide a combine harvester which is expected to improve the recovery efficiency of a second product by properly recovering the second product according to the growing condition of a crop to be harvested by the field environment and the kind of the crop, thus enabling the improvement of threshing efficiency as the whole.SOLUTION: In the combine harvester, a chaff sieve 62 constituted by parallelly arranging many selection plates 73 enabling the openings to be changed is installed over from above a second product-recovering part 31 to the rear end part of a sieve case 27 in the sieve case 27 of the selection part 26 of a threshing apparatus 3. An operation tool 75 for setting the openings, connected to the chaff sieve 62 is installed in the vicinity of a dust-discharging opening 32 positioned at the rear end of the threshing apparatus 3 to enable the openings of the chaff sieve 62 to be changed by the operation of the operation tool 75 from the dust-discharging opening 32 side.COPYRIGHT: (C)2011,JPO&INPIT【課題】本発明は、収穫する作物の圃場環境による生育状態や収穫物の種類に応じて適正に2番物を回収するようにして2番物の回収効率を良くし、以って全体としての脱穀効率を向上が期待できるコンバインを提供することにある。【解決手段】脱穀装置3の選別部26のシーブケース27における2番回収部31の上方からシーブケース27の後端部に亘って、開度変更可能な多数の選別板73を並列配備して構成されたチャフシーブ62を設け、チャフシーブ62に連結した開度設定用の操作具75を、脱穀装置3の後端に位置する排塵口32の近傍に備えて、排塵口32側より操作具75を操作してチャフシーブ62の開度を変更できるようにしたものである。【選択図】図3
