PROBLEM TO BE SOLVED: To aim at the improvement of drainage caused by a compaction effect at a gutter bottom part during ridging.SOLUTION: A ridging device is provided by mounting a tilling rotary 6 and a plurality lines of ridge-forming tools 7, 7 comprising a pair of piece ridging plates 40, 40, for receiving tilled soil at the rear direction of a tractor vehicle body 1, installing rollers 41, 41 pressing the gutter bottom part B of a furrow at the rear direction of the ridge-forming tools 7, 7, and as accompanying with the movement of the rollers 41, 41, pressing the side surface lower part of the formed ridge and the gutter bottom part B formed at the right and left furrows and at the same time pressing the lower end side of right and left slope of the ridge for hardening by setting the width W of the rollers 41, 41 larger than the interval L of the piece ridging plates 40, 40 opposing by placing the gutter bottom part B between the adjacent ridges.COPYRIGHT: (C)2013,JPO&INPIT【課題】 畝立中において、溝底部の鎮圧作用による排水性の向上を図る。【解決手段】トラクタ車体1の後方に耕耘ロータリ6と耕耘土壌を受けて一対の片培土板40,40からなる畝成形器7,7…を複数条装着し、これら畝成形器7,7…の後方に畝間の溝底部Bを押圧するローラ41,41…を設け、該ローラ41,41…の幅Wを隣接する畝の間の溝底部Bを挟んで対向する片培土板40,40の間隔Lよりも大に設定したことにより、ローラ41,41…の移動に伴い、形成される畝の側面下部と左右の畝間に形成される溝の底部Bを押圧すると同時に畝の左右斜面の下端側を押圧して固める。【選択図】 図2
