PNEUMATIC TIRE

• Main Author: TAKITA KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 05.04.2018
• 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 which, even while forming an annular projection group in which a plurality of types of projections whose volumes are differ from each other are aligned, can suppress generation of a bear and reduce dynamic unbalance.SOLUTION: A pneumatic tire includes: a pair of bead parts; sidewall parts 2 extending outward in a tire radial direction from the respective bead parts; and a tread part continuing from respective outer edges in the tire radial direction of the sidewall parts 2. An annular projection group 20 in which a plurality of types of projections disposed side by side in the tire radial direction is formed on an external surface in a buttress area of each sidewall part 2. When, among the projections included in the annular projection group 20, first projections 21 have a minimum volume, and second projections 22 have a maximum volume, a ratio V2/V1 of the volume V2 of the second projection 22 to the volume V1 of the first projection 21 is more than 1.00 but less than 5.00.SELECTED DRAWING: Figure 2 【課題】体積が異なる複数種の突起を並べた環状突起群を形成しながらも、ベアの発生を抑制し、ダイナミックアンバランスを低減できる空気入りタイヤを提供する。【解決手段】該タイヤは、一対のビード部と、そのビード部の各々からタイヤ径方向外側に延びるサイドウォール部２と、そのサイドウォール部２の各々のタイヤ径方向外側端に連なるトレッド部とを備える。サイドウォール部２のバットレス領域の外表面には、体積の異なる複数種の突起をタイヤ周方向に並べた環状突起群２０が形成されている。環状突起群２０に含まれる突起のうち、体積が最も小さいものを第１突起２１とし、体積が最も大きいものを第２突起２２とするとき、第１突起２１の体積Ｖ１に対する第２突起２２の体積Ｖ２の比Ｖ２／Ｖ１が１．００を超え且つ５．００未満である。【選択図】図２