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Pneumatic tire

A technology for pneumatic tires and plies, applied in the reinforcement layer, tire parts, transportation and packaging of pneumatic tires, can solve problems such as delamination, improve durability, suppress deformation, and prevent delamination and other failures. Effect

Inactive Publication Date: 2016-03-09
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when a chafer is installed, there is a possibility of failure such as delamination starting from the rolled-up end of the chafer

Method used

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[0053] (1) In the present invention, the second protrusion made of the second topping rubber 6r may be provided on the surface 6A of the chafer 6 adjacent to the carcass ply 4 and above the chafer cord 6c. The bar protrudes 61 . exist Figure 4 A cross-sectional view of the carcass ply 4 and the chafer 6 of the present embodiment is shown in . In the present embodiment, the carcass ply 4 and the chafer 6 are arranged such that the first ridge protrusion 41 and the second ridge protrusion 61 face each other. Thereby, since the distance between the carcass cord 4c and the chafer cord 6c can be appropriately maintained, deformation at the member end can be suppressed, and failures such as delamination can be prevented. However, since the gap between the carcass ply 4 and the chafer 6 becomes large, there is a possibility that air may enter.

[0054] (2) In addition, if Figure 5 As shown, it is also possible to Figure 4 The illustrated carcass ply 4 and chafer 6 are configu...

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Abstract

The invention provides a pneumatic tire for improving durability of the tire side. The pneumatic tire (T) comprises a carcass ply (4) and a chafer (6), wherein the carcass ply (4) is covered by a carcass cord thread alignment (4S) formed by a plurality of parallel carcass cord threads (4c) with specified thickness of first unvulcanized rubber (4r) from two sides, the chafer (6) is arranged adjacent to one surface (4A) of the carcass ply (4), the chafter (6) is covered by a chafer cord thread alignment (6S) formed by a plurality of chafer cord threads parallelled to the carcass cord threads (4c) with specified thickness of second unvulcanized rubber (6r) from two sides, in addition, a first protruded ridge (41) formed by the first unvulcanized rubber (4r) is arranged on one surface (4A) of the carcass ply (4) and above the carcass cord threads (4c).

Description

technical field [0001] The present invention relates to a pneumatic tire including a plurality of carcass members. Background technique [0002] A pneumatic tire is constructed using a plurality of carcass ply members, a belt ply, and the like. Generally, a carcass member is formed by covering a cord array composed of a plurality of cords arranged in parallel with unvulcanized rubber from both sides. [0003] In pneumatic tires, in tires used for high-load vehicles such as light trucks, there is a possibility of failure such as delamination starting from the rolled-up end of the carcass ply wound around the bead core. For the durability of the bead portion, chafers are generally provided. The chafer is configured to wrap the carcass ply around the bead core from the inner side to the outer side in the tire width direction (for example, refer to Patent Documents 1, 2). [0004] However, even when a chafer is provided, there is a possibility of failure such as delamination ...

Claims

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Application Information

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IPC IPC(8): B60C9/02
Inventor 永井邦彦
Owner TOYO TIRE & RUBBER CO LTD
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