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pneumatic tire

A technology of pneumatic tires and tires, applied in tire parts, tire sidewalls, transportation and packaging, etc., can solve problems such as difficult forming, difficult air, and discharge.

Active Publication Date: 2017-05-31
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of vulcanization molding of a decorative pattern of a complicated shape, for example, it is difficult for air to escape from the surface of the sidewall portion, so it is difficult to form it.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] Based on the specifications in Table 1, a pneumatic tire with a decorative pattern including a diagonal pattern was trial-produced, and its performance was tested. In addition, a pilot-produced pneumatic tire having a decorative pattern in which longitudinal linear patterns extending in the tire radial direction are repeatedly arranged in the tire circumferential direction (Comparative Example 1), and the same test was performed. At the time of vulcanization molding, the sidewall portions of these pneumatic tires were intentionally formed as recesses with a size of about 0.5 mm.

[0057] The common specifications are as follows.

[0058] Tire size: 195 / 65R15

[0059] The height of the diagonal pattern (rib) h: 0.5mm

[0060] The width of the diagonal pattern (rib) W: 0.8mm

[0061] The interval P between adjacent diagonal patterns (protrusions): 1.0mm

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Abstract

A pneumatic tire provided by the invention can inhibit concave and convex portions occurring in a surface of a tire side part and improve a hidden effect that the concave and convex portions are unnoticed. The pneumatic tire (1) is provided with a strip-shaped decoration pattern (3) on the surface (2S) of the tire side part (2), the decoration pattern (3) enables a plurality of unit patterns (6) to be disposed in the circumferential direction of the tire, each unit pattern (6) is in the shape of an approximate sector which has a visual effect divided by an inner side contour (7A) extending in the circumferential direction of the tire on the radial inner side of the tire and an outer side contour (7B) extending in the circumferential direction of the tire on the radial outer side of the tire and a pair of longitudinal contours (7C) extending in the circumferential direction of the tire. Unit patterns (6) comprise first unit patterns (6A) comprising a plurality of oblique-line-shaped patterns (8A) arranged on one side in an inclined manner and second unit patterns (6B) comprising a plurality of oblique-line-shaped patterns (8B) arranged on the other side in an inclined manner, and the first unit patterns (6A) and the second unit patterns (6B) are alternatively arranged in the circumferential direction of the tire.

Description

Technical field [0001] The present invention relates to a pneumatic tire having a decorative pattern formed on the surface of the sidewall portion. Background technique [0002] In general, the sidewall of a pneumatic tire is covered with rubber with a small thickness, for example. Therefore, due to the internal structural materials of the tire, that is, the seams of the carcass, residual air, etc., local irregularities called protrusions and depressions are prone to appear on the surface of the sidewall. [0003] Conventionally, in order to make the unevenness inconspicuous, a pneumatic tire in which a belt-shaped decorative pattern extending in the tire circumferential direction is formed on the surface of the sidewall portion has been proposed (for example, the following Patent Document 1). The decorative pattern is also called a comb-tooth pattern, and is formed by repeatedly arranging a longitudinal line pattern extending in the tire radial direction in the tire circumferenti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C13/00
Inventor 广末瑛介荻原佐和
Owner SUMITOMO RUBBER IND LTD