PROBLEM TO BE SOLVED: To enable the swinging operation of a dust-sending valve to be carried out well by preventing the coiling of grain culms and long grain culm fragments around a cooperation link.SOLUTION: A plurality of the dust-sending valves 57 for guiding a treating material to the downstream side of a threshing treatment direction accompanied with the rotation of a threshing cylinder 21 is arranged in a raw at a prescribed interval in the threshing treatment direction in the inner face side of a ceiling plate 48 covering the upper part of the threshing cylinder 21, and each of the dust-sending valves 57 is synchronously linked by a synchronous link 61 so as to enable the simultaneous swinging operation centering each swinging fulcrum 60 set at the same position in the rotating direction of the threshing cylinder 21. An extended part 48A extended outward from the ceiling plate 48 is formed in the ceiling plate 48 so as to have a storing space S3, and the extended part 48A is formed so that the synchronous link 61 may be stored in a state in which the synchronous link 61 positions at the outside of the extension line L extended from the inner surface part 48B of the extended part 48A in the ceiling plate 48, formed at the upstream side in the rotation direction of the threshing cylinder 21, along the guiding direction of the treated product by the inner surface part 48B.COPYRIGHT: (C)2011,JPO&INPIT【課題】連係リンクへの穀稈や長い穀稈片などの絡み付きを防止して送塵弁の揺動操作を良好に行えるようにする。【解決手段】扱胴21の上部を覆う天板48の内面側に、処理物を扱胴21の回転に伴って脱穀処理方向の下手側に案内する複数の送塵弁57を脱穀処理方向に所定間隔をあけて整列配備し、各送塵弁57を、扱胴21の回転方向で同じ位置に設定した各揺動支点60を中心にした同時揺動操作が可能になるように連係リンク61により連動連結し、天板48に、収容空間S3を有するように天板48の外側に張り出す張出部48Aを形成し、張出部48Aを、天板48における張出部48Aの扱胴21回転方向上手側に形成した内面部分48Bから内面部分48Bによる処理物の案内方向に沿って延出する延長線Lの外側に連係リンク61が位置する状態で連係リンク61を収容するように形成する。【選択図】図5
