PROBLEM TO BE SOLVED: To solve the problem: a winnower transmission mechanism is enlarged when a tension lever for operating a tension pulley is installed in a tension adjustment mechanism of a winnower.SOLUTION: In a thresher, a winnowing chamber 40 is formed below a threshing chamber 22, a swing sorting shelf 41 which swings and reciprocates in a ventilation direction is installed below the winnowing chamber 40, a first conveyor 45 and a second conveyor 46 are installed below the swing sorting shelf 41, and a lateral counter shaft 50 is installed in front of the winnowing chamber 40, a first belt 64 is wound around an inner pulley 51A of a counter pulley 51 installed to the counter shaft 50, a second pulley 67 of the second conveyor 46, and a first pulley 68 of the first conveyor 45, a second belt 53 is wound between an outer pulley 51B installed to an outside part of the inner pulley 51A and a winnower pulley 52 capable of changing the rotational speed of a winnower 38, and a tension lever 59 for rotational operation of a tension arm 56 of the second belt 53 is arranged inside the second belt 53.COPYRIGHT: (C)2014,JPO&INPIT【課題】唐箕の張力調節機構において、テンションプーリーを操作するテンションレバーを設けた場合、唐箕伝動機構が大型化するという課題がある。【解決手段】扱室22の下方に風選室40を形成し、風選室40の下方に送風方向に往復揺動する揺動選別棚41を設け、該揺動選別棚41の下方には一番コンベア45と二番コンベア46を設け、風選室40の前に、左右方向のカウンタ軸50を設け、該カウンタ軸50に備えたカウンタプーリー51の内側プーリー51Aと二番コンベア46の二番プーリー67と一番コンベア45の一番プーリー68に第1ベルト64を巻回し、前記内側プーリー51Aの外側の部位に備えた外側プーリー51Bと唐箕38の回転速度を変速可能な唐箕プーリー52との間に第2ベルト53を巻回し、該第2ベルト53のテンションアーム56を回動操作するテンションレバー59を、前記第2ベルト53の内側に配置した脱穀装置。【選択図】図4
