PROBLEM TO BE SOLVED: To prevent a reduction of cutting performance caused by accumulation of waste cereal stems and mud soil upward on a cutting blade.SOLUTION: The cutting blades 10 of a reaping device 4 is constituted of a lower blade 21 installed to a frame 20 of the reaping device 4 in a fixed state and reciprocally and slidingly moving upper blades 22 on left and right sides, a central lower blade unit 23 in the laterally central position out of the lower blade 21 is formed larger than other lower blade units 24 of the lower blade 21, and the left and right upper blades 22 are dividedly formed to comprise a left side upper blade 22A locating on the left side and a right side upper blade 22B locating on the right side based on the central lower blade unit 23. On the upper side of the upper blades 22, cutting blade-holding members 26 are installed to be plural with a predetermined distance in the sliding direction of the upper blades 22, and the cutting blade-holding members 26 fix fixing units 27 of base parts of the cutting blade holding members 26 to the side of the frame 20. Plate parts 29 fixed to the top parts of the cutting blade holding members 26 are constituted to face the upper surfaces of the upper blades 22, and out of a plurality of the cutting blade holding members 26, the plate parts 29 of the cutting blade-holding members 26A on both the left and right sides of the central lower cutting blade unit 23 are brought to mutually approach to face on the central lower blade unit 23.COPYRIGHT: (C)2012,JPO&INPIT【課題】刈刃の上方への穀稈屑や泥土の堆積による切断性能の低下。【解決手段】刈取装置4の刈刃10は刈取装置4のフレーム20に固定状態に設けた下刃21と左右に往復摺動する上刃22により構成し、前記下刃21のうち左右中央位置の中央下刃部23は他の下刃21の刃部24より大きく形成し、この中央下刃部23を基準に前記左右の上刃22を左側に位置する左側上刃22Aと右側に位置する右側上刃22Bとに分割形成する。上刃22の上側には刈刃押さえ部材26を上刃22の摺動方向に所定間隔を置いて複数設け、刈刃押さえ部材26は刈刃押さえ部材26の基部の取付部27をフレーム20側に固定する。刈刃押さえ部材26の先端部に固定のプレート部29を前記上刃22の上面に臨ませた構成とし、複数の刈刃押さえ部材26のうち、前記中央下刃部23の左右両側の刈刃押さえ部材26Aのプレート部29は互いに接近させて中央下刃部23上に臨ませる。【選択図】図2
