PROBLEM TO BE SOLVED: To provide a waste culm cutter of a combine-harvester required to diffuse and discharge the cut straw, which is fed to and cut by a cut part of the waste culm cutter, is required to be widely diffused in a uniform layer onto the cutting travel mark ground surface of the combine-harvester and is discharged, but the diffused and discharged straw layer has a tendency to rise, thereby to interfere with the cut grass-divided lever to pass in a subsequent cutting and running work, and the cutting blade device or the like so that it becomes liable to hook or disturb the cutting operation.SOLUTION: In the inner face of a side-cover 13 on the butt side end portion of a rear cover 12, an inclined guide surface 19 is formed by bending the lower end portion to the inner side, and the butt side cut straw is blown by the discharge wind from an air outlet 17 by said diffusion discharge air fan 16 to the inner side of that butt-side side-cover 13.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】コンバインの排稈カッターでは、この排稈カッターの切断部に供給されて切断する切断わらを、コンバインの刈取走行跡地面に幅広く、均一層に拡散して排出させることが要求されるが、株元側の拡散排出わら層が盛り上がる傾向にあって、後続の刈取走行作業で通る刈取分草杆や、刈刃装置等に干渉し、引っ掛け易くなったり、刈取作用を乱すこととなり易い。【解決手段】リヤカバー12の株元側端部の株元側サイドカバー13内側面に、下端部を内側へ屈曲して傾斜案内面19を形成して、前記拡散排風ファン16による吹出口17からの排風によって、株元側切断わらを、この株元側サイドカバー13の内側面に吹き出して拡散案内させる。【選択図】図2
