PROBLEM TO BE SOLVED: To easily form a ridge whose upper surface is horizontal even when an interval between adjacent ridges is made to become narrow.SOLUTION: A ridge formation device comprises: a machine frame； a rotary cultivation part being supported to the machine frame rotatably around a rotary shaft； a ridge making machine provided on a rear side of the rotary cultivation part； and a making soil escape member being provided on a front side of the rotary cultivation part for making soil escape from inside to outside of a rotary shaft direction, for reducing an amount of soil flowing into the rotary cultivation part. The making soil escape member is provided on each of a front side on one side and a front side of the other side of the rotary shaft direction of the rotary cultivation part. The ridge formation device further comprises a cover for covering an upper side and side parts of the rotary cultivation part, and the making soil escape member is positioned on outside of the cover.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2019,JPO&INPIT【課題】隣り合う畝同士の間隔を狭くした場合であっても上面が水平な畝を容易に成形する。【解決手段】畝成形装置は、機枠と、機枠に回転軸回りに回転自在に支持されたロータリ耕耘部と、ロータリ耕耘部の後方に設けられた畝立て器と、ロータリ耕耘部の前方に設けられ且つ回転軸方向の内方から外方に土を逃がしてロータリ耕耘部に流入する土の量を減少させる土逃がし部材と、を備えている。また、土逃がし部材は、ロータリ耕耘部の回転軸方向の一方側の前方と他方側の前方にそれぞれ設けられている。また、ロータリ耕耘部の上方及び側方を覆うカバーを備え、土逃がし部材は、カバーの外側方に位置する。【選択図】図５
