PROBLEM TO BE SOLVED: To provide a waste straw treatment part structure of a combine harvester adapted to prevent the exposure of an opening/closing lever from the rear end of a waste straw cutting part while maintaining the operability of the opening/closing lever for operating to open/close an opening/closing cover.SOLUTION: The waste straw treatment part structure of the combine harvester includes the waste straw cutting part 9, and the opening/closing cover 10 switched into a waste straw lead-in state of opening a waste straw lead-in port above the waste straw cutting part 9 around a turning shaft 12a and into a waste straw discharge state of closing the waste straw lead-in port. The turning shaft 12 of the opening/closing cover 10 is integrally provided with an operating arm 23, and the opening/closing lever 14 for operating to open/close the opening/closing cover 10 is pivoted in a swingable manner to the operating arm 23. An engaging part 23a and an engaged part 14a that can fix and release fixation of the relative attitude of the operating arm 23 and opening/closing lever 14 are provided at the operating arm 23 and the opening/closing lever 14 individually, and the opening/closing cover 10 can be switched into the waste straw lead-in state and the waste straw discharge state by the opening/closing lever 14 fixed in the relative attitude with the operating arm 23 by engaging the engaging part 23a with the engaged part 14a.COPYRIGHT: (C)2013,JPO&INPIT【課題】開閉蓋を開閉操作する開閉レバーの操作性を維持しつつ、排ワラ切断部の後端から開閉レバーが露出しないようにしたコンバインの排ワラ処理部構造を提供する。【解決手段】排ワラ切断部9と、排ワラ切断部9の上方の排ワラ導入口を回動軸12回りに開く排ワラ導入状態と、排ワラ導入口を閉じる排ワラ排出状態とに切り換える開閉蓋10と、を備え、開閉蓋10の回動軸12に操作アーム23を一体的に設けると共に、操作アーム23に開閉蓋10の開閉を操作する開閉レバー14を揺動自在に枢支し、操作アーム23と開閉レバー14との相対姿勢を固定及び固定解除自在な係合部23aと被係合部14aとを操作アーム23と開閉レバー14とに各別に設けて、係合部23aと被係合部14aとを係合させて操作アーム23との相対姿勢を固定した開閉レバー14により開閉蓋10を排ワラ導入状態と排ワラ排出状態とに切換自在に構成した。【選択図】図6
