PNEUMATIC TIRE

• Main Author: SHIMIZU EISEI
• Format: Patent
• Language: English; Japanese
• Published: 19.07.2018
• 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 provide a pneumatic tire capable of enhancing wet performance by devising a shape of a siping disposed at a tread part.SOLUTION: A pneumatic tire includes a chamfered siping 12 and a non-chamfered siping. In the chamfered siping 12, one end part 12c terminates in a rib 10, on the other hand, the other end part 12d communicates with any one of main grooves 9 located at both sides of the rib 10. The chamfered sipings 12 communicating with each of the main grooves 9 located at both sides of the rib 10 are alternately arranged in a tire circumferential direction. The non-chamfered siping 13 is arranged adjacent to one side of the chamfered siping 12 in at least the tire circumferential direction. A radius of curvature TR of an arc forming a tread profile and a radius of curvature RR of an outer contour line of the rib 10 having the chamfered siping 12 satisfy relation of TR>RR. Width Nwof the non-chamfered siping 13 at a peak P to be the outermost side in the tire radial direction of the rib 10 having the chamfered siping 12 and the minimum width Nwat the non-chamfered siping 13 satisfy relation of Nw>Nw.SELECTED DRAWING: Figure 2 【課題】トレッド部に設けたサイプの形状を工夫することにより、ウエット性能を向上させることを可能にした空気入りタイヤを提供する。【解決手段】面取りサイプ１２と非面取りサイプを有し、面取りサイプ１２はリブ１０内で一端部１２ｃが終端する一方で他端部１２ｄがリブ１０の両側に位置する主溝９のいずれか一方に連通し、リブ１０の両側に位置する主溝９のそれぞれに連通した面取りサイプ１２がタイヤ周方向に交互に配置され、非面取りサイプ１３は面取りサイプ１２の少なくともタイヤ周方向の片側に隣接して配置され、トレッドプロファイルを成す円弧の曲率半径ＴＲと面取りサイプ１２を有するリブ１０の外輪郭線の曲率半径ＲＲとがＴＲ＞ＲＲの関係を満たし、面取りサイプ１２を有するリブ１０のタイヤ径方向最外側となる頂点Ｐでの非面取りサイプ１３の幅ＮｗPと非面取りサイプ１３における最小幅ＮｗMとがＮｗP＞ＮｗMの関係を満たす。【選択図】図２