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发明公开
CN103213460A 充气轮胎 有权

充气轮胎
摘要：
本发明提供的充气轮胎，能够保持胎圈线的紧固力并且降低嵌合压，从而提高轮辋组装时的操作性以及胎圈部的耐久性。充气轮胎（1）在胎圈部（4）配置胎圈芯（5）。上述胎圈芯（5）包括：第一胎圈线（9A）、和用式（1）表示的伸长率（α）大于上述第一胎圈线（9A）的伸长率的第二胎圈线（9B）。第二胎圈线（9B）在轮胎径向的最内侧至少配置有一根，伸长率α（%）＝ΔL/L×100%…（1），L：无载荷下的胎圈线长度，ΔL：作用了单位载荷后的伸长量。
摘要（英）：

A pneumatic tire has bead cores provided in bead portions. The bead cores include a first bead wire, and a second bead wire having an elongation alpha, where alpha (%)=DeltaL/L100, L is a length of each of the bead wires under no load, and DeltaL is an elongation amount obtained when a unit load is applied. The elongation alpha of the second bead wire is greater than an elongation of the first bead wire. The number of the second bead wire provided in an innermost side portion in a tire radial direction is at least one.

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