PROBLEM TO BE SOLVED: To perform threshing efficiently by constituting a supporting plate as hardly inhibiting the flow of grain stalks, to aim at the lightening of the threshing cylinder and to stably support a threshing cylinder frame to a supporting plate.SOLUTION: This threshing cylinder of a combine harvester includes a supporting shaft 510 forming a rotary shaft a plurality of supporting plates 532, 533 placed in the supporting shaft 510 as one unit, while being penetrated through their center by the supporting shaft 510 a plurality of threshing cylinder frames 535, 535, ..., arranged in parallel to the supporting shaft 510 at a constant interval with each other on the outer circumference of the supporting plates 532, 533 and a plurality of threshing teeth 536, 536, ..., installed as protruding in outer direction at each of the threshing cylinder frames 535, 535, ..., wherein the supporting plates 532, 533 have a polygonal outer shape, each of the threshing cylinder frames 535 has a rectangular cross section, and each of the threshing cylinder frames 535 has a constitution of being attached to the sides of the polygonal shape of the supporting plates 532, 533.COPYRIGHT: (C)2013,JPO&INPIT【課題】支持プレートが穀稈の流れを阻害し難い構成とすることにより脱穀を効果的に行えるようにし、扱胴の軽量化を図り、扱胴フレームの支持プレートに対して安定的に支持できるようにする。【解決手段】回転軸を成す支軸510と、当該支軸510に中心部を貫通された状態で当該支軸510に一体装備される複数の支持プレート532・533と、当該支持プレート532・533の外周上に、当該支軸510と平行に、かつ、互いに一定間隔を隔てて配置される複数の扱胴フレーム535・535・・・と、当該各扱胴フレーム535・535・・・に外方向に向けて突出するように設けられる複数の扱歯536・536・・・と、を具備するコンバインの扱胴において、支持プレート532・533は、多角形状の外形を有し、各扱胴フレーム535は、角型断面を有し、各扱胴フレーム535は、支持プレート532・533の多角形の辺に取り付けられる構成とした。【選択図】図3
