| 摘要 |
PURPOSE:To improve durability of a type by making many holes reaching from the tread surface to the inner peripheral face in the circumferential direction of a tyre tread and burying rivets with spherical rivet heads in said holes in such a manner as tips of the rivets project from the tyre surface due to pressure of the tyre. CONSTITUTION:Many through holes 2, reaching from the tread surface to the inner peripheral face in the circumferential direction of the tyre tread, are arranged, for example, zig zag. spherical rivets 4 are buried in the through hole 2 in a condition not to be extracted with rivet heads 3 held inward. This causes internal pressure of the tyre not only to support but also press outward the rivet heads 3 so as to project the rivet tips from the tyre tread surface and reveal skid preventive function. This configuration leads the inner pressure to execution of support to the rivets 4 along with a buffer action against a road surface pressure, and durability of the tyre can be improved. |
