PROBLEM TO BE SOLVED: To improve the land leveling performance of a rotary cultivation device.SOLUTION: A rotary cultivation device comprises: a rotary shaft that rotates around a shaft core； a plurality of cultivation pawls attached to the rotary shaft. The plurality of cultivation pawls comprise: a center cultivation pawl which is attached to a center part in a shaft center direction on the rotary shaft； one-side cultivation pawl which is arranged on a side of the center cultivation pawl and on an outer side of one side where is a direction toward to one end of the rotary shaft from the center part； other-side cultivation pawl which is arranged on a side of the center cultivation pawl and on an outer side of the other side which is a direction toward the other end of the rotary shaft from the center part. The one-side cultivation pawl and the other-side cultivation pawl are arranged in a same phase in the circumferential direction of the rotary shaft, the one-side cultivation pawl having a blade part extending outward of one side and the other-side cultivation pawl having a blade part extending outward of the other side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】ロータリ耕耘装置の均平性能を向上させる。【解決手段】ロータリ耕耘装置は、軸心回りに回転する回転軸と、回転軸に取り付けられた複数の耕耘爪と、を備え、複数の耕耘爪は、回転軸における軸心方向の中央部に配置された中央の耕耘爪と、中央の耕耘爪の側方であって、中央部から回転軸の一端部に向かう方向である一側外方に配置された一側耕耘爪と、中央の耕耘爪の側方であって、中央部から回転軸の他端部に向かう方向である他側外方に配置された他側耕耘爪とを有し、一側耕耘爪と他側耕耘爪とは、回転軸の周方向に同位相で配置され、且つ、一側耕耘爪は、一側外方に向けて延びる刃部を有し、他側耕耘爪は、他側外方に向けて延びる刃部を有する。【選択図】図１
