PROBLEM TO BE SOLVED: To provide a land grading member for a rotary tilling device, which is advantageous in terms of cost and has excellent workability.SOLUTION: A middle material or support plate is equipped with a first through-hole 45 and a second through-hole 40 the support plate is rotated along the second through-hole 40 with a first shaft 27 as a center so that the support plate is freely changed in position in a horizontal position and in a vertical position. One end of the second through-hole 40 is equipped with a first positioning part 41 for regulating movement of a second shaft in a radial direction with the first shaft 27 as the center when the support plate in the vertical position and the other end of the second through-hole 40 is equipped with a second positioning part 42 for regulating movement of the second shaft in the radial direction with the first shaft 27 as the center when the support plate is in the horizontal position and the width L1 of a middle part of the second through-hole 40 in the radial direction with the first shaft 27 as the center is formed larger than the width L2 of the first positioning part 41 and the width L3 of the second positioning part 42 in the radial direction with the first shaft 27 as the center.COPYRIGHT: (C)2012,JPO&INPIT【課題】コスト的に有利で作業性も良いロータリ耕耘装置用の整地部材を提供する。【解決手段】中部材又は支持板に第1貫通孔45と第2貫通孔40とを設け、支持板を第1の軸27を中心として第2貫通孔40に沿って回動させることにより、支持板を横向き姿勢及び縦向き姿勢に姿勢変更自在に構成し、第2貫通孔40の一端に、支持板が縦向き姿勢にあるときに第1の軸27を中心とした半径方向での第2の軸の移動を規制する第1位置決め部41を設けると共に、第2貫通孔40の他端に、支持板が横向き姿勢にあるときに第1の軸27を中心とした半径方向での第2の軸の移動を規制する第2位置決め部42を設け、第1の軸27を中心とした半径方向での第2貫通孔40の中間部の幅L1を、第1の軸27を中心とした半径方向での第1位置決め部41の幅L2及び第2位置決め部42の幅L3よりも大きく形成してある。【選択図】図9
