PROBLEM TO BE SOLVED: To provide a ridge forming machine capable of forming a tight ridge with a smooth surface.SOLUTION: A ridge forming machine is such that: divided pieces 310 of a cone rotating body 31 of a ridge forming part 3 are each constituted of a rear end side 311 in which the outer circumferential surface is formed so that a distance from a rotation center axis 315 is increased in an arch shape from a rotation direction front to a rotation direction rear, and a front end side 313 which has a connection part 318 abutting on an inner surface side of the adjacent divided pieces 310 in the rotation direction front, and an inclined plane 312 in which the outer circumferential surface is formed from the connection part 318 so that a distance from the rotation center axis 315 is decreased from the rotation direction front to the rotation direction rear an inclination angle of the inclined plane 312 is inward inclined at 10-30 degrees to a tangent line of a rotation diameter the rear end of the divided piece 310 is in an outermost circumferential position of the cone rotating body 31 and a rotation direction rear end part has an overlapped part 317 at an inclined plane 312 side of the adjacent divided pieces 310 at the rotation direction rear side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】硬く締まった表面が滑らかな畦の形成ができる畦形成機を提供する。【解決手段】畦成形部3の円錐状回転体31の分割片310は、外周面が回転中心軸315からの距離が回転方向前方から回転方向後方に向って円弧状に増大する後方側311と、隣接する回転方向前方側の分割片310の内面側に当接する連結部318と連結部318から外周面が回転中心軸315からの距離が回転方向前方から回転方向後方に向って減少した傾斜面312を有する前方側313とで形成され、傾斜面312の傾斜角度は、回転径の接線に対し内側に10度乃至30度角で傾斜していて、分割片310の後端は円錐状回転体31の最外周位置であり、回転方向後端部は隣接する回転方向後方側の分割片310の傾斜面312側に重なり部分317を有して構成されている畦形成機を提案する。【選択図】 図1
