PROBLEM TO BE SOLVED: To reduce a risk of dust mixed in the sorting wind from a threshing device to fall on a driving motor for driving an opening/closing cover of a waste straw cutting device and a linkage mechanism from the driving motor to the opening/closing cover.SOLUTION: A waste straw processing device includes a waste straw cutting device 5, a waste straw conveying device, and a top cover 43 for covering the upper side of the waste straw cutting device 5 and the waste straw conveying device. An opening/closing cover 52 of the waste straw cutting device 5 is configured to be switchable in posture between a standing posture a1 capable of accepting waste straw being dropped and supplied from the waste straw conveying device and a closing posture a2 for making the waste straw being dropped and supplied from the waste straw conveying device flow down and discharged to a machine body rear side. A vent hole 46 for passing the sorting wind of a fan mill in the threshing device side to the outside is formed in the top cover 43.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2018,JPO&INPIT【課題】排ワラ切断装置の開閉カバーを駆動する駆動用モータや駆動用モータから開閉カバーへの連係機構に対して、脱穀装置からの選別風に混在する塵埃が降りかかる虞を低減する。【解決手段】排ワラ切断装置5と、排ワラ搬送装置と、排ワラ切断装置5及び排ワラ搬送装置の上側を覆う上部カバー43とが備えられ、排ワラ切断装置5の開閉カバー52が、排ワラ搬送装置から落下供給される排ワラを受け入れ可能な起立姿勢a1と、排ワラ搬送装置から落下供給される排ワラを機体後方側へ流下排出させる閉塞姿勢a2と、に姿勢切換可能に構成され、上部カバー43に、脱穀装置側における唐箕の選別風を外部へ抜く通風口46が形成されている。【選択図】図5
