Pneumatic tire and tire molding mold
AssigneeThe Yokohama Rubber Co., Ltd.
InventorTakashi KIDESAKI
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes sipes disposed in a land portion formed in a tread portion, and pin holes for stud pins disposed in the land portion. The sipes are disposed at positions where a distance Ds from the pin hole and a diameter Dp of the pin hole satisfy (Ds/Dp)≥4.0. A sipe in which the distance Ds from the pin hole and the diameter Dp of the pin hole satisfy (Ds/Dp)≤5.0 is defined as a pin hole neighboring sipe. A sipe of which the distance Ds from the pin hole is the smallest, among the sipes in which the distance Ds from the pin hole and the diameter Dp of the pin hole satisfy (Ds/Dp)>5.0, is defined as a normal sipe. The pin hole neighboring sipe is formed in a high rigidity shape having higher rigidity than the normal sipe.
Claims13
A pneumatic tire comprising:
- a plurality of sipes disposed in a land portion formed in a tread portion;
- and
- a plurality of pin holes for stud pins disposed in the land portion,
- the sipes being disposed at positions where a distance Ds from the pin hole and a diameter Dp of the pin hole satisfy a relationship of (Ds/Dp)≥4.0,
- the sipe, among the plurality of sipes, in which the distance Ds from the pin hole and the diameter Dp of the pin hole satisfy a relationship of (Ds/Dp)≤5.0, being defined as a pin hole neighboring sipe,
- the sipe of which the distance Ds from the pin hole is the smallest, among the sipes in which the distance Ds from the pin hole and the diameter Dp of the pin hole satisfy a relationship of (Ds/Dp)>5.0, being defined as a normal sipe, and the pin hole neighboring sipe being formed in a high rigidity shape having higher rigidity than the normal sipe.
A tire molding mold comprising:
- a plurality of sectors divided in a tire circumferential direction;
- a plurality of sipe blades disposed on a tread molding surface of the sectors;
- and
- a plurality of mold pins disposed on the tread molding surface,
- the sipe blades being disposed at positions where a distance Dsm from the mold pin and a diameter Dpm of the mold pin satisfy a relationship of (Dsm/Dpm)≥4.0,
- the sipe blade, among the plurality of sipe blades, in which the distance Dsm from the mold pin and the diameter Dpm of the mold pin satisfy a relationship of (Dsm/Dpm)≤5.0, being defined as a pin neighboring blade,
- the sipe blade of which the distance Dsm from the mold pin is the smallest, among the sipe blades in which the distance Dsm of the mold pin and the diameter Dpm of the mold pin satisfy a relationship of (Dsm/Dpm)>5.0, being defined as a normal blade, and
- the pin neighboring blade being formed in a high rigidity shape having higher rigidity than the normal blade.
Dependencies are inferred from the claim text.