| 摘要 |
PROBLEM TO BE SOLVED: To provide mulching sheet pressor piles which keep good the covering effect of soil by greatly increasing the pulling resistance from the soil surface without unnecessarily expanding the holes of the piles pierced in the mulching sheet. SOLUTION: The pressor pile 10 includes a leg 3, which pierces the soil surface, in the lower part of the head 2 which presses down the mulching sheet. The leg 3 comprises the spearhead-shaped cylindrical core component 3M and the spring plate components 3S and 3S, the latter of which extend across from the tip to the joint part on both sides of the core component 3M. In the normal time when no load is applied to the leg 3, the spring plate components 3S and 3S develop to curve outward in a line in the right and left respectively. When more than the predetermined load is applied to the right and left of the leg 3 toward inside, the spring plate components 3S and 3S change to a superpositional state of pressing to curve inward in a line in the right and left respectively. In the released time when the load to the right and left of the leg 3 toward inside is removed, the spring plate components 3S and 3S return to the original developed state from the superpositional state by their restoring force. COPYRIGHT: (C)2011,JPO&INPIT
|
