PROBLEM TO BE SOLVED: To enable enhancement of workability in ridge formation by allowing the size of a ridge top former to be changed to conform to a low ridge and a high ridge, thereby eliminating the need to prepare two types of rotating ridge formers or two types of ridge top formers corresponding to the low and high ridges.SOLUTION: A rotating ridge former 13 comprises a ridge side former 15 capable of forming one side face W2 of a ridge W and a ridge top former 16 capable of forming a top face W1 of the ridge. The circumference of the ridge top former is provided with a plurality of pressing faces K, ... disposed at intervals. Each of the pressing faces is provided with a flexible and elastic pressing plate G extending from a pressing face side in a front position in a rotation direction toward a pressing face part K1 of an adjacent pressing face in a rear position. A size change mechanism 18 allows a size change operation in a radial direction of each of the pressing plates and can fix the position of the pressing plate at an enlarged diameter position GA and a reduced diameter position GC.COPYRIGHT: (C)2015,JPO&INPIT【課題】上面整畦体を畦高さの低い畦用及び畦高さの高い畦用にサイズ変更することができ、畦高さの低い畦用及び畦高さの高い畦用の二種類の回転整畦体や二種類の上面整畦体を用意する必要がなくなり、整畦作業性を向上することができる。【解決手段】回転整畦体13は畦Wの一方側面W2を整畦可能な側面整畦体15及び畦の上面W1を整畦可能な上面整畦体16からなり、上面整畦体の外周部分に複数個の圧締面体K・・を間隔を置いて配設すると共に各々の圧締面体に回転方向前方位置の圧締面体側から隣り合う後方位置の圧締面体の圧締面部K1に至る可撓弾性をもつ圧締板体Gを配設し、各々の圧締板体の放射方向の拡縮動作を許容すると共に圧締板体を拡径位置GA及び縮径位置GCに位置固定可能な拡縮機構18を設けてなる。【選択図】図5
