PROBLEM TO BE SOLVED: To provide a ridge forming machine capable of forming a ridge that is tightened hard and has a smooth surface.SOLUTION: A ridge forming machine is proposed as follows: the surface of a conical rotating body 31 is configured by connecting radial multiple plate-shaped segments 310 centering on a rotary central axis 315 the slope of the conical rotating body 31 is formed of a first circular cone 31a of a cylindrical rotating body 30 side having a small inclination angle to a rotating shaft and a second circular cone 31b of an outer circumferential side having a large inclination angle to the rotating shaft of the conical rotating body 31 and the segments 310 each have the segment 310 of the rotating direction rear side coming in abutment with an inner side of the segment 310 of the front side and being connected therewith, and are formed of a first sweep-back angle part by a stepped part 316 formed of a plate thickness of the segment 310 rear end, a slope 312 having a second sweep-back angle continuously provided from the first sweep-back angle part, and a rear side pressing surface 311 in which an outer circumferential surface has an advancing angle where a distance from a rotary central axis increases in an arc shape from the front toward the rear in the rotating direction.SELECTED DRAWING: Figure 1【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】円錐状回転体31の表面は回転中心軸315を中心とした放射状の複数枚の板状の分割片310が連結構成されていて、円錐状回転体31の傾斜面は、回転軸に対し傾斜角度が小さい円筒状回転体30側の第一円錐部31aと円錐状回転体31の回転軸に対し傾斜角度が大きい外周側の第二円錐部31bとで形成されていて、分割片310は、それぞれ回転方向後方側の分割片310が前方側の分割片310の内面側に当接して連結されていて、分割片310後端部の板厚分で形成された段差部316による第1の後退角部と、第1の後退角部から連続して設けた第2の後退角を有した傾斜面312と、外周面が回転中心軸からの距離が回転方向前方から後方に向って円弧状に増大する前進角を有した後方側押圧面311とで形成されている畦成形部を有する畦形成機を提案する。【選択図】 図1
