Tire

A tire and tire circumferential technology, applied in tires, motorcycle tires, tire parts and other directions, can solve the problems of reduced acceleration performance and durability, insufficient rigidity, etc., and achieve the effect of improving acceleration performance and good rigidity.

Pending Publication Date: 2022-01-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the sparsely spaced region, acceleration performance and durability may decrease due to insufficient rigidity, and further improvement is desired

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0035] Hereinafter, an embodiment of the present invention will be described based on the drawings.

[0036] figure 1 It is a meridian cross section in a normal state of the tire 1 of this embodiment.

[0037] "Normal state" refers to an unloaded state in which the tire is mounted on a regular rim (not shown) and filled with a normal internal pressure. Hereinafter, unless otherwise mentioned, the dimensions and the like of each part of the tire are values ​​measured in this regular state.

[0038] "Regular rim" is a rim whose standard is determined for each tire in the standard system including the standard on which the tire is based. For example, if it is JATMA, it is "Standard Rim", and if it is TRA, it is "Design Rim", In the case of ETRTO, it is "Measuring Rim".

[0039] "Regular internal pressure" refers to the air pressure of each standard determined for each tire in the standard system including the standard on which the tire is based. In the case of JATMA, it is the...

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PUM

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Abstract

The invention provides a tire capable of suppressing a decrease in acceleration performance due to insufficient rigidity of a tread portion. A tread portion (2) of a tire (1) is embedded with cap belt cords (10) which are arranged in a spiral shape along the circumferential direction of the tire. After the cap cord (10) is taken out from the tread portion (2), when the length of the cap cord (10) after a first time period has elapsed is set as Lb and the length of the cap cord (10) after a second time period that is larger than the first time period has elapsed is set as La, Lb < = La is satisfied in at least a part of the region.

Description

technical field [0001] The present invention relates to a tire having a tread portion. Background technique [0002] Conventionally, a tire having a spiral belt in a tread portion is known (for example, refer to Patent Document 1). [0003] Patent Document 1: WO2018 / 123685 Publication [0004] In the aforementioned Patent Document 1, the helical belt is provided with closely spaced regions and sparsely spaced regions. [0005] However, in the sparsely spaced region, acceleration performance and durability performance may decrease due to insufficient rigidity, and further improvement is desired. Contents of the invention [0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire capable of suppressing a decrease in acceleration performance due to insufficient rigidity of a tread portion. [0007] The present invention is a tire having a tread portion in which band cords arranged spirally in...

Claims

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Application Information

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IPC IPC(8): B60C11/00
CPCB60C11/00B60C2011/0091B60C9/2204B60C2009/2228B60C2009/2266B60C2200/10B60C2009/2252B29D30/1621B29D30/60B29D30/1628B29D2030/1664B29D30/70B60C2009/2209B60C9/0007B60C9/2006B60C2009/2083
Inventor 芝本昇平
Owner SUMITOMO RUBBER IND LTD
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