To provide a compact rotary cover device in which soil hardly adheres to the inner surface of a cover.SOLUTION: The attachment portion 5 for fixing to the rotary transmission case 34 of the tiller, the side cover 2 attached to the attachment portion 5, the slide arranged so as to overlap the side cover 2 from the lower side A cover 3 and an outer cover 4 attached to an outer end portion of the slide cover 3. The side cover 2 and the slide cover 3 are semicylindrical in which the cylinder radius R is 27 mm larger than the turning radius r of the tip portion of the tilling claw 32 , And a slide fixing part 6 capable of allowing the sliding cover 3 to appear and set in and out of the sliding cover 3 is provided at two places at the front and rear between the side cover 2 and the sliding cover 3, The wing nut 8 is screwed into the protrusion adjusting bolt which is inserted from the slender elongated hole 10 to the bolt fixing hole 13 provided in the side cover 3 and the periphery of the slide long hole 10 of the slide cover 3 is formed on the flat surface 11 .(FIG.【課題】カバー内面に土が付着し難いコンパクトなロータリカバー装置を提供する。【解決手段】耕耘機のロータリ用ミッションケース34に固定するための取着部5と、取着部5に配着したサイドカバー2と、サイドカバー2に下側から重なるように配設したスライドカバー3と、スライドカバー3の外端部に取着した外カバー4とを備え、サイドカバー2及びスライドカバー3は円筒半径Rが耕耘爪32の先端部の回転半径rより27mm大きい半円筒状に形成し、サイドカバー2とスライドカバー3との間の前後2箇所にスライドカバー3の出没と固定とが可能なスライド固定部6を設け、スライド固定部6はスライドカバー3に設けた左右方向に細長いスライド長孔10からサイドカバー3に設けたボルト固定孔13へ貫挿させた出没調節ボルトに蝶ナット8を螺着すると共にスライドカバー3のスライド長孔10の周囲を平坦面11に形成する。【選択図】図2
