| 摘要 |
PROBLEM TO BE SOLVED: To improve a wet hydroplaning performance, a land part rigidity and an on-ice performance of a pneumatic tire. SOLUTION: A steep slanted lug sipe 18 having a certain orientation is formed on a land part 16 between a pair of peripheral major sipes 14, and tapered segments 22, 24 slanted toward the sipes and having their widths narrowed from a treading side to a kicking side are formed on end edges of the steep slanted lug sipe 18 and the peripheral major sipes 14. Water on the treading surface flows smoothly from the treading side toward the licking side into the sipes through these tapered segments to improve a wet hydro planing performance. Since a sipe wall strength is assured by the tapered segments 22 while keeping a large area of the steep slanted lug sipes 18, it is possible to keep a water draining characteristic without arranging any peripheral major sipes on a tire equatorial plane and at the same time to assure a braking characteristic and an operating stability through improvement of a land part rigidity. In addition, it is possible to improve an on-snow running performance since some snow columns with a certain strength can be formed at the tapered segments 22, 24 at the time of on-snow running operation. COPYRIGHT: (C)2010,JPO&INPIT |
