PROBLEM TO BE SOLVED: To provide a rotary harrow tool with at least one plate which has at its lower end portion a working portion designed for being engaged and displaced in the soil, and which constitutes at least a front edge and at least an active elongated face of the working portion.SOLUTION: The rotary harrow tool includes an upper plate (5) which has a rounded inner corner (10) in an upper section situated opposite the free or lower end (3) of the second part (2). Each of plates (5, 5) has a substantially plane structure, when viewed in section perpendicular to the edge portion (6) and to the active face. Each of the plates has a thickness that decreases from its front longitudinal rim forming the active edge (6) to its rear longitudinal rim (11) mounted in a receiving site, preferably to a position contacting a shoulder, while forming a bevel (biseau) in cooperation with an intermediate support piece (9).SELECTED DRAWING: Figure 2BCOPYRIGHT: (C)2017,JPO&INPIT【課題】下側端部に土壌と接触し、土中を移動する作業部分を有し、少なくとも先端エッジと工具の作業部分の少なくとも細長い活性面とを構成する少なくとも1つのプレートを有する回転ハローの工具。【解決手段】第2部分(2)の自由端または下端部(3)とは反対側に位置する上部区域にアールの付いた内側コーナー(10)を有する上側プレート(5)を有し、各プレート(5、5)は、エッジ部分(6)および活性表面に対して垂直な断面で見た時に、実質的に平坦な構造を有し、各プレートは活性エッジ部分(6)を形成する縦方向前方端縁から受け部に取付けられた縦方向端縁(11)まで、好ましくは肩部に当接するまで厚さが減少し、中間支持部材(9)と一緒になってベベル(biseau)を形成する。【選択図】図2B
