PROBLEM TO BE SOLVED: To provide a combine which is suitable for the reaping work of crops which are thick in culms by favorably securing cutting performance by enlarging (expanding a depth) a cutting area of a culm generated by a receiving blade and a blade part.SOLUTION: A cutting blade device comprises a receiving blade as a fixed blade which is formed into a tip-narrowed rod shape extending to a fore-and-aft direction being a progressing direction, and arranged at an interval in left and right directions being a lateral direction of a machine body, and a cutting blade as a movable blade which slide-contacts with the receiving blade and is enabled in reciprocal cutting slide movement in the left and right directions. The cutting blade is formed by alternately arranging a main blade part which has a relatively-large mountain shape and a sub-blade part which has a small mountain shape. The sub-blade part firstly applies cutting work to culms of crops which intrude into a clearance between the left and right adjacent receiving blades, and after that, the main blade part applies the cutting work.COPYRIGHT: (C)2014,JPO&INPIT【課題】受刃と刃部とによる茎稈の切断面積を大きく(懐を広く)して、切断性能を良好に確保することで、茎稈が太い作物の刈取作業にも好適なコンバインを提供すること。【解決手段】刈刃装置は、進行方向である前後方向に伸延する先端先細り棒状に形成するとともに、機体の幅方向である左右方向に間隔をあけて配置した固定刃としての受刃と、受刃に摺接して左右方向に往復切断摺動可能となした可動刃としての刈刃と具備し、刈刃は、相対的に大きい山型の主刃部と小さい山型の副刃部とを左右方向に互い違いに配置して形成し、左右に隣接する受刃同士の間に入ってきた作物の茎稈には、先ず副刃部が切断作用し、その後に主刃部が切断作用するようにした。【選択図】図5
