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JPH0516618A Expired / Lapsed JP ⏱️ 0.0 years remaining

Pneumatic tire bead structure

Assignee: Bridgestone Corp
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Filing: 1991-07-15
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Granted: —
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Expires: 2011-07-15
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 生産能率を低下させることなく、タイヤ 1の 重量および転がり抵抗を低減させながら、外側プライ10 の半径方向外端24近傍におけるセパレーションを防止す る。 【構成】 スティフナー20を境界面Xで内、外側スティ フナー部21、22に2分割し、この外側スティフナー部22 のショアA硬度を55度以下と低くして変形を容易にす る。これにより、外側スティフナー部22が接地変形時に サイドウォール部に生じる撓みを吸収し、該外側プライ 10の半径方向外端24における圧縮歪を低減させる。ま た、この外側スティフナー部22とサイドゴム25とが実質 上同一組成のゴムであると、ゴム種類の増加を阻止で き、押出し成型も同時にできる。 (57) [Summary] [Purpose] While reducing the weight and rolling resistance of the tire 1 without reducing the production efficiency, the outer ply 10 To prevent separation near the outer end 24 in the radial direction. [Structure] The stiffener 20 is divided into two inside stiffener parts 21 and 22 at the boundary surface X, and the outside stiffener part 22 is divided into two parts. The Shore A hardness of is reduced to 55 degrees or less to facilitate deformation. As a result, the outer stiffener portion 22 absorbs the flexure generated in the sidewall portion during the ground contact deformation, and the outer ply The compressive strain at the radial outer end 24 of 10 is reduced. Further, when the outer stiffener portion 22 and the side rubber 25 are rubbers having substantially the same composition, it is possible to prevent an increase in the kinds of rubbers and simultaneously perform extrusion molding.

Inventors

  • 👤 Hiroyuki Iida
  • 👤 広之 飯田
  • 👤 Tatsuro Nakano
  • 👤 達朗 中野
  • 👤 Makoto Tsuruta
  • 👤 鶴田  誠

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-10-26 10:32
CPC Classifications
B; B60; B60C; B60C15/00; B60C15/06; B60C15/0603; B60C15/0607

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