| 摘要 |
PROBLEM TO BE SOLVED: To reduce the time and the cost of maintenance and also to prevent adhesion of soil to the field surface.SOLUTION: A ridging wheel 1 includes: a hard cylindrical rim 2; and an elastic body 3 for covering the outer peripheral surface thereof. The elastic body 3 includes: one projection 3a formed on the central part in the width direction of the inner peripheral surface and extending in the circumferential direction; a pair of raised parts 3b formed on the whole peripheries of both edge parts of the inner peripheral surface and raised in such a manner that the more they approach the central part in the width direction, the thicker they are; and an engagement part 3c formed to engage together with the raised parts 3b with the outer peripheral edge of the cylindrical rim 2, wherein one projection 3a and the paired raised parts 3b abut on the central part in the width direction in the outer peripheral surface of the cylindrical rim 2 and both edge parts, respectively, thereby forming a void 4 between them. |
