PROBLEM TO BE SOLVED: To provide an angle adjustment device of a tillage cover, facilitating angle adjustment, and easily grasping an adjustment position.SOLUTION: An opening angle adjustment device 70 of a tillage cover 43 of a rotary tillage device 4 provided on a rear part of a control machine 1 is such that: airframe right and left central sides of the right and left tillage covers 43 are vertically rotatably supported on beams 40 provided on the airframe right and left centers a prop 72 is erected on the rear part of the beam 40 one end of an adjust plate 71 is pivoted on the upper surface of the tillage cover 43 a long hole 71b is opened in the adjust plate 71 along the longitudinal direction a plurality of notches 71c, 71c... are formed on the long hole 71b the notch 71c is constituted to be fixable by engaging with a fixation screw 73 provided on the prop 72 and a fixation instruction part 76 is formed near the notch 71c of the adjust plate 71.COPYRIGHT: (C)2015,JPO&INPIT【課題】容易に角度調節ができ、調節位置も容易に把握できる耕耘カバーの角度調節装置を提供しようとする。【解決手段】管理機1の後部に付設するロータリ耕耘装置4の耕耘カバー43の開放角度調節装置70であって、左右の耕耘カバー43の機体左右中央側を機体左右中央に設けたビーム40に上下回動自在に支持し、ビーム40の後部上に支柱72を立設し、前記耕耘カバー43の上面にアジャストプレート71の一端を枢支し、該アジャストプレート71に長手方向に沿って長孔71bを開口し、該長孔71bに複数のノッチ71c・71c・・・を形成して、前記支柱72に設けた固定ネジ73にノッチ71cを係合して固定可能に構成するとともに、前記アジャストプレート71のノッチ71c近傍に固定用指示部76を形成した。【選択図】図2
