PNEUMATIC TIRE FOR HEAVY LOAD

• Main Author: MAEHARA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 30.05.2016
• Subjects: DEVICES OR ARRANGEMENTS RELATED TO TYRES; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To improve abrasion resistance performance while maintaining wet performance.SOLUTION: A pneumatic tire 1 for a heavy load has a pair of center land parts 6 and 6, a pair of middle land parts 7 and 7 and a pair of shoulder land parts 8 and 8 formed. Widths in a tire shaft direction of the respective land parts 6, 7 and 8 repeatedly increase and decrease in a tire circumference direction. In the center land parts 6 and the middle land parts 7, stepping-faces lined in a tire circumference direction are partitioned into hexagonal blocks. In the shoulder land parts 8 stepping-faces lined in the tire circumference direction are partitioned into polygonal shoulder blocks. The total of the maximum widths in the tire shaft direction of the pair of center land parts 6 and 6, the pair of middle land parts 7 and 7 and the pair of shoulder land parts 8 and 8 and the maximum lengths in the tire shaft direction of a pair of center sipes 13 and 13 are between 1.05 and 1.31 times the width of a tread.SELECTED DRAWING: Figure 1 【課題】ウェット性能を維持しつつ、耐摩耗性能を向上させる。【解決手段】一対のセンター陸部６、６、一対のミドル陸部７、７、及び、一対のショルダー陸部８、８が形成された重荷重用空気入りタイヤ１である。各陸部６、７、８は、タイヤ軸方向の幅がタイヤ周方向に増減を繰り返す。センター陸部６及びミドル陸部７は、タイヤ周方向に並ぶ踏面が六角形状のブロックに区分される。ショルダー陸部８は、タイヤ周方向に並ぶ踏面が多角形状のショルダーブロックに区分される。一対のセンターブロック６、６、一対のミドルブロック７、７、及び、一対のショルダーブロック８、８のタイヤ軸方向最大幅と、一対のセンターサイプ１３、１３のタイヤ軸方向最大長さとの合計は、トレッド幅の１．０５〜１．３１倍である。【選択図】図１