JP2012001031A - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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Publication number
JP2012001031A
JP2012001031A JP2010135698A JP2010135698A JP2012001031A JP 2012001031 A JP2012001031 A JP 2012001031A JP 2010135698 A JP2010135698 A JP 2010135698A JP 2010135698 A JP2010135698 A JP 2010135698A JP 2012001031 A JP2012001031 A JP 2012001031A
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Prior art keywords
identifier
pneumatic tire
sidewall
advantageous
divided
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JP5630085B2 (en
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Hiroki Sudo
裕輝 須藤
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Priority to JP2010135698A priority Critical patent/JP5630085B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/001—Decorating, marking or the like

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic tire equipped with an identifier which can suppress cracks, improve visibility irrespective of a light irradiation state or a tire rotation angle and is advantageous in achieving a cost reduction of a mold for tire molding.SOLUTION: The identifier 14 consists of a first part 20 positioned at a site away in a direction perpendicular to the surface 12A of a sidewall portion 12 and a second part 22 formed on the first part 20 and further away from the first part 20 in a direction where the first part 20 is away from the surface 12A. A site at a boundary between the surface 12A and the first part 20 consists of a first inclined portion 24 which is gradually displaced from the surface 12A to the first part 20. A portion at a boundary between the first part 20 and the second part 22 consists of a second inclined portion 26 which is gradually displaced from the first part 20 to the second part 22.

Description

本発明は、サイドウォール部の表面に識別子が設けられた空気入りタイヤに関する。   The present invention relates to a pneumatic tire in which an identifier is provided on the surface of a sidewall portion.

サイドウォール部の表面には、メーカー名や商品名、サイズ、仕様を表示する各種の文字、記号、数値などの識別子が設けられている。
この種の識別子は、従来、サイドウォール部の表面から突出させることで構成されている。
したがって、従来の識別子を有する空気入りタイヤでは、サイドウォール部の表面の断面形状が、識別子の箇所で急激に変化することから、該箇所でタイヤ周方向にクラックが生じ易く、タイヤの商品価値を高める上で不利があった。
また、識別子を、サイドウォール部の表面から単に突出させて構成しているため、視認性に劣り、はっきりと視認しにくい不利があった。
従来、視認性を向上させるため、識別子を、模様や荒さの異なる仕上げ面を含ませて構成したタイヤが提案されている（特許文献１）。 On the surface of the side wall portion, identifiers such as various characters, symbols, and numerical values for displaying a manufacturer name, a product name, a size, and a specification are provided.
This type of identifier is conventionally configured to protrude from the surface of the sidewall portion.
Therefore, in a pneumatic tire having a conventional identifier, the cross-sectional shape of the surface of the sidewall portion changes abruptly at the location of the identifier. There was a disadvantage in raising it.
In addition, since the identifier is formed by simply projecting from the surface of the sidewall portion, there is a disadvantage in that it is inferior in visibility and difficult to see clearly.
Conventionally, in order to improve visibility, there has been proposed a tire in which an identifier includes a finished surface having a different pattern or roughness (Patent Document 1).

特開２００６−２２４７０４号公報JP 2006-224704 A

しかしながら、上述の従来技術では、タイヤ成型用金型を作製するのに多大な手間を要し、タイヤ成型用金型のコストが上昇する不利がある。
本発明は前記事情に鑑み案出されたものであって、本発明の目的は、タイヤ成型用金型のコストの上昇を抑えつつ、クラックの発生を抑制でき、また、光の照射状態やタイヤの回転角度の如何に拘わらず視認性を向上できる空気入りタイヤを提供することにある。 However, the above-described conventional technique has a disadvantage that a great deal of labor is required to produce a tire molding die, and the cost of the tire molding die increases.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to suppress the generation of cracks while suppressing an increase in the cost of a tire molding die, and also to the light irradiation state and the tire. It is an object of the present invention to provide a pneumatic tire capable of improving visibility regardless of the rotation angle.

前記目的を達成するため本発明は、サイドウォール部の表面に設けられた識別子を有する空気入りタイヤにおいて、前記識別子は、前記表面と直交する方向に離れた箇所に位置する第１部分と、前記第１部分に設けられ前記第１部分が前記表面から離れる方向において前記第１部分よりもさらに離れた第２部分とで構成され、前記表面と前記第１部分との境の箇所は、前記表面から次第に前記第１部分側に変位する第１傾斜部で構成され、前記第１部分と前記第２部分の境の箇所は、前記第１部分から次第に前記第２部分側に変位する第２傾斜部で構成されていることを特徴とする。   In order to achieve the above object, the present invention provides a pneumatic tire having an identifier provided on a surface of a sidewall portion, wherein the identifier is located at a location separated in a direction perpendicular to the surface; The first portion is provided with a second portion further away from the first portion in the direction in which the first portion is away from the surface, and the boundary between the surface and the first portion is the surface. A first inclined portion that gradually displaces from the first portion to the second portion side. The second inclined portion that gradually displaces from the first portion to the second portion side. It is comprised by the part.

本発明によれば、識別子が第１部分と第２部分とで構成されており、しかも、サイドウォール部の表面と第１部分との境の箇所は第１傾斜部となっているので、サイドウォール部の表面の断面形状が、識別子の箇所で急激に変化することはなく、クラックの発生を抑制する上で有利となる。
また、識別子は第１部分と第２部分と第１傾斜部と第２傾斜部とで構成されているので、識別子の表面積は大きく、したがって、視認性を向上する上で有利となる。
また、識別子は、模様や荒さの異なる仕上げ面を有していないので、タイヤ成型用金型のコストの上昇を抑える上で有利となる。 According to the present invention, the identifier is composed of the first portion and the second portion, and the boundary portion between the surface of the sidewall portion and the first portion is the first inclined portion. The cross-sectional shape of the surface of the wall portion does not change abruptly at the location of the identifier, which is advantageous in suppressing the occurrence of cracks.
In addition, since the identifier is composed of the first portion, the second portion, the first inclined portion, and the second inclined portion, the identifier has a large surface area, which is advantageous in improving visibility.
Moreover, since the identifier does not have a finished surface with a different pattern or roughness, it is advantageous in suppressing an increase in the cost of the tire molding die.

空気入りタイヤの識別子部分の側面図である。It is a side view of the identifier part of a pneumatic tire. 第１の実施の形態の識別子の拡大図である。It is an enlarged view of the identifier of 1st Embodiment. 図２のＡＡ断面図である。It is AA sectional drawing of FIG. 第２の実施の形態の識別子の斜視図である。It is a perspective view of the identifier of a 2nd embodiment. 図４のＡＡ断面図である。It is AA sectional drawing of FIG. 第３の実施の形態の識別子の斜視図である。It is a perspective view of the identifier of 3rd Embodiment. 第３の実施の形態の識別子の一部を破断した斜視図である。It is the perspective view which fractured | ruptured a part of identifier of 3rd Embodiment. 図６のＡＡ断面図である。It is AA sectional drawing of FIG. 第４の実施の形態の識別子の斜視図である。It is a perspective view of the identifier of 4th Embodiment. 図９のＡＡ断面図である。It is AA sectional drawing of FIG.

（第１の実施の形態）
図１に示すように、空気入りタイヤ１０のサイドウォール部１２の表面１２Ａに識別子１４が設けられている。なお、本発明において識別子１４とは、メーカー名や商品名を含む標章や、サイズ、仕様を表示する各種の文字、記号、形状、数字などを広く含む。
図２、図３に示すように、識別子１４は、表面１２Ａと直交する方向に離れた箇所に位置する第１部分２０と、第１部分２０に設けられ第１部分２０が表面１２Ａから離れる方向において第１部分２０よりもさらに離れた第２部分２２とで構成されている。
第１の実施の形態では、第１部分２０は表面１２Ａから突出（膨出）しサイドウォール部の表面と平行する湾曲面または平坦面で構成され、第２部分２２は第１部分２０から突出（膨出）しサイドウォール部の表面と平行する平行する湾曲面または平坦面で構成されている。
この例では識別子１４は、幅よりも十分に大きい寸法の長さを有する細長形状の部分の組み合わせからなり、各細長形状の部分において、第２部分２２は、第１部分２０の幅方向の中央部に設けられている。 (First embodiment)
As shown in FIG. 1, an identifier 14 is provided on the surface 12 </ b> A of the sidewall portion 12 of the pneumatic tire 10. In the present invention, the identifier 14 widely includes a mark including a manufacturer name and a product name, and various characters, symbols, shapes, numbers, and the like for displaying sizes and specifications.
As shown in FIGS. 2 and 3, the identifier 14 includes a first portion 20 located in a position away from the surface 12A in a direction orthogonal to the surface 12A, and a direction in which the first portion 20 provided in the first portion 20 is separated from the surface 12A. And the second portion 22 further away from the first portion 20.
In the first embodiment, the first portion 20 protrudes (swells) from the surface 12A and is configured by a curved surface or a flat surface parallel to the surface of the sidewall portion, and the second portion 22 protrudes from the first portion 20. (Swells) and is composed of parallel curved surfaces or flat surfaces parallel to the surface of the sidewall portion.
In this example, the identifier 14 is composed of a combination of elongated portions having a length sufficiently larger than the width, and in each elongated portion, the second portion 22 is the center in the width direction of the first portion 20. Provided in the department.

表面１２Ａと第１部分２０との境の箇所は、表面１２Ａから次第に第１部分２０側に変位する第１傾斜部２４で構成されている。
また、第１部分２０と第２部分２２の境の箇所は、第１部分２０から次第に第２部分２２側に変位する第２傾斜部２６で構成されている。 The location of the boundary between the surface 12A and the first portion 20 is configured by a first inclined portion 24 that gradually displaces from the surface 12A toward the first portion 20 side.
Further, the boundary portion between the first portion 20 and the second portion 22 is constituted by a second inclined portion 26 that is gradually displaced from the first portion 20 toward the second portion 22 side.

このような実施の形態によれば、サイドウォール部１２の表面１２Ａに、厚さの大きい従来の識別子が直接設けられることなく、まず、厚さの小さい第１部分２０が位置し、この第１部分２０の上に第２傾斜部２６を介在させて第２部分２２が設けられている。さらに、サイドウォールの表面１２Ａと第１部分２０との境の箇所は、第１部分２０に向かって次第に厚さが大きくなる第１傾斜部２４として形成されている。
したがって、従来のようにサイドウォール部１２の表面１２Ａの断面形状が、識別子１４の箇所で急激に変化することがなく、該箇所におけるクラックの発生を抑制する上で有利となり、タイヤ１０の商品価値を高める上で有利となる。
また、識別子１４は第１部分２０と第２部分２２と第１傾斜部２４と第２傾斜部２６とで構成されているので、従来のように識別子１４を、サイドウォール部１２の表面１２Ａから単に突出させて構成する場合や、模様や荒さの異なる仕上げ面を用いて構成する場合に比べ、識別子１４の表面積を大きく確保でき、タイヤあるいは車両が設置された環境における光の照射状態やタイヤ１０の回転角度の如何に拘わらず視認性を向上させ、よりはっきりと視認し易くする上で有利となる。
また、識別子は、従来のように、模様や荒さの異なる仕上げ面を有していないので、タイヤ成型用金型のコストの上昇を抑える上で有利となる。 According to such an embodiment, the first portion 20 having a small thickness is first positioned without directly providing a conventional identifier having a large thickness on the surface 12A of the sidewall portion 12. A second portion 22 is provided on the portion 20 with a second inclined portion 26 interposed therebetween. Furthermore, the boundary portion between the sidewall surface 12 </ b> A and the first portion 20 is formed as a first inclined portion 24 that gradually increases in thickness toward the first portion 20.
Therefore, the cross-sectional shape of the surface 12A of the sidewall portion 12 does not change abruptly at the location of the identifier 14 as in the prior art, which is advantageous in suppressing the occurrence of cracks at the location, and the commercial value of the tire 10 It is advantageous in increasing
Further, since the identifier 14 includes the first portion 20, the second portion 22, the first inclined portion 24, and the second inclined portion 26, the identifier 14 is separated from the surface 12A of the sidewall portion 12 as in the conventional case. The surface area of the identifier 14 can be secured larger than in the case where the surface is simply projected and configured using finished surfaces having different patterns and roughness, and the light irradiation state in the environment where the tire or the vehicle is installed or the tire 10. Regardless of the rotation angle, it is advantageous for improving visibility and facilitating visual recognition more clearly.
Further, since the identifier does not have a finished surface with a different pattern or roughness as in the conventional case, it is advantageous in suppressing an increase in the cost of the tire molding die.

（第２の実施の形態）
図４、図５に示すように、第２の実施の形態では、表面１２Ａから突出（膨出）する第１部分２０と、第１部分２０から突出（膨出）する第２部分２２とで識別子１４が構成されている点で第１の実施の形態と同様であるが、第１部分２０が、互いに分割された複数の第１分割体３０の集合で構成され、第２部分２２が、各第１分割体３０上に設けられた第２分割体３２で構成されている点が第１の実施の形態と異なっている。
本実施の形態では、識別子１４の細長形状の部分において、第１分割体３０が、細長形状の部分の長手方向に沿って並べられている。
第１分割体３０は半球面状に表面１２Ａから膨出しており、また、第２分割体３２は第１分割体３０の上部中央から半球面状に膨出している。
したがって、この実施の形態は、第１分割体３０の外周部が第１傾斜部２４に相当しており、第２分割体３２の外周部が第２傾斜部２６に相当している。
このような第２の実施の形態によっても、第１の実施の形態と同様に、サイドウォール部１２の表面１２Ａの断面形状が識別子１４の箇所で急激に変化することがないので、クラックの発生を抑制する上で有利となり、また、識別子１４の表面積を大きく確保でき、視認性を向上させる上で有利となり、また、タイヤ成型用金型のコストの上昇を抑える上で有利となる。
特に、第１部分２０と第２部分２２とが合わさった形状は全て同一形状であるので、同一形状の最小単位を繰り返して形成することでタイヤ成型用金型を製作でき、タイヤ成型用金型のコストの上昇を抑える上でより有利となる。
なお、第１分割体３０および第２分割体３２の形状は半球面状に限定されず、周囲が第１傾斜部２４、第２傾斜部２６で囲まれた多角形で構成するなど、用いる形状は任意である。 (Second Embodiment)
As shown in FIGS. 4 and 5, in the second embodiment, the first portion 20 that protrudes (bulges) from the surface 12 </ b> A and the second portion 22 that protrudes (bulges) from the first portion 20. Similar to the first embodiment in that the identifier 14 is configured, but the first portion 20 is configured by a set of a plurality of first divided bodies 30 divided from each other, and the second portion 22 is The point which is comprised by the 2nd division body 32 provided on each 1st division body 30 differs from 1st Embodiment.
In the present embodiment, in the elongated portion of the identifier 14, the first divided bodies 30 are arranged along the longitudinal direction of the elongated portion.
The first divided body 30 bulges from the surface 12A in a hemispherical shape, and the second divided body 32 bulges from the upper center of the first divided body 30 in a hemispherical shape.
Therefore, in this embodiment, the outer peripheral portion of the first divided body 30 corresponds to the first inclined portion 24, and the outer peripheral portion of the second divided body 32 corresponds to the second inclined portion 26.
Also in the second embodiment, as in the first embodiment, the cross-sectional shape of the surface 12A of the sidewall portion 12 does not change abruptly at the location of the identifier 14, so that a crack is generated. This is advantageous in suppressing the increase in the surface area of the identifier 14 and is advantageous in improving the visibility, and is advantageous in suppressing an increase in the cost of the tire molding die.
In particular, since the shapes of the first portion 20 and the second portion 22 are all the same shape, a tire molding die can be manufactured by repeatedly forming the minimum unit of the same shape. This is more advantageous in suppressing the increase in cost.
The shape of the first divided body 30 and the second divided body 32 is not limited to a hemispherical shape, and is a shape to be used, such as being configured by a polygon surrounded by the first inclined portion 24 and the second inclined portion 26. Is optional.

また、この第２の実施の形態では、第１部分２０と第２部分２２とを、それぞれ分割体３０、３２で構成した場合について説明したが、第１部分２０を第１の実施の形態のように単一体で構成し、第２部分２２のみを円や多角形からなる複数の第２分割体３２で構成するようにしてもよい。   Moreover, in this 2nd Embodiment, although the case where the 1st part 20 and the 2nd part 22 were each comprised with the division bodies 30 and 32 was demonstrated, the 1st part 20 of 1st Embodiment is demonstrated. Thus, it may be configured as a single body, and only the second portion 22 may be configured with a plurality of second divided bodies 32 made of circles or polygons.

（第３の実施の形態）
図６乃至図８に示すように、第３の実施の形態では、サイドウォール部１２の表面１２Ａに、表面１２Ａから窪んだ凹部３４が設けられ、識別子１４がこの凹部３４の底面１２Ｂに設けられている点が第１、第２の実施の形態と異なっている。
凹部３４の底面１２Ｂは、サイドウォール部１２の表面１２Ａに平行する湾曲面または平坦面で構成されている。
この凹部３４は図６乃至図８に示すように、各識別子１４を収容する大きさの複数の凹部３４であってもよく、あるいは、複数の識別子１４の全てが収容される単一の凹部３４であってもよい。
なお、底面１２Ｂとサイドウォール部１２の表面１２Ａとの境の箇所は、底面１２Ｂから表面１２Ａに至るにつれて次第に高さが大きくなる傾斜部３６で接続されている。
第１部分２０は底面１２Ｂから突出しサイドウォール部１２の表面１２Ａに平行する湾曲面または平坦面で構成され、第２部分２２は第１部分２０から突出しサイドウォール部１２の表面１２Ａに平行する湾曲面または平坦面で構成されている。
この例でも識別子１４は、幅よりも十分に大きい寸法の長さを有する細長形状の部分の組み合わせからなり、各細長形状の部分において、第２部分２２は、第１部分２０の幅方向の中央部に設けられている。
底面１２Ｂと第１部分２０との境の箇所は、底面１２Ｂから次第に第１部分２０側に変位する第１傾斜部２４で構成され、第１部分２０と第２部分２２の境の箇所は、第１部分２０から次第に第２部分２２側に変位する第２傾斜部２６で構成されている。
さらに、第２部分２２の頂部２２０２は、図８に示すように、サイドウォール部１２の表面１２Ａと同じ高さかまたはサイドウォール部１２の表面１２Ａよりも低い高さを有している。 (Third embodiment)
As shown in FIGS. 6 to 8, in the third embodiment, the surface 12A of the sidewall portion 12 is provided with a recess 34 that is recessed from the surface 12A, and the identifier 14 is provided on the bottom surface 12B of the recess 34. This is different from the first and second embodiments.
The bottom surface 12 </ b> B of the recess 34 is configured by a curved surface or a flat surface parallel to the surface 12 </ b> A of the sidewall portion 12.
As shown in FIGS. 6 to 8, the recess 34 may be a plurality of recesses 34 sized to accommodate each identifier 14, or a single recess 34 in which all of the plurality of identifiers 14 are accommodated. It may be.
Note that the boundary between the bottom surface 12B and the surface 12A of the sidewall portion 12 is connected by an inclined portion 36 whose height gradually increases from the bottom surface 12B to the surface 12A.
The first portion 20 protrudes from the bottom surface 12B and is configured by a curved surface or a flat surface parallel to the surface 12A of the sidewall portion 12, and the second portion 22 protrudes from the first portion 20 and curves parallel to the surface 12A of the sidewall portion 12. It consists of a surface or a flat surface.
Also in this example, the identifier 14 is composed of a combination of elongated portions having a length that is sufficiently larger than the width, and in each elongated portion, the second portion 22 is the center in the width direction of the first portion 20. Provided in the department.
The location of the boundary between the bottom surface 12B and the first portion 20 is composed of a first inclined portion 24 that gradually displaces from the bottom surface 12B toward the first portion 20, and the location of the boundary between the first portion 20 and the second portion 22 is The second inclined portion 26 is gradually displaced from the first portion 20 toward the second portion 22 side.
Furthermore, as shown in FIG. 8, the top portion 2202 of the second portion 22 has the same height as the surface 12 </ b> A of the sidewall portion 12 or a height lower than the surface 12 </ b> A of the sidewall portion 12.

このような第３の実施の形態によっても、第１の実施の形態と同様に、サイドウォール部１２の表面１２Ａの断面形状が識別子１４の箇所で急激に変化することがないので、クラックの発生を抑制する上で有利となり、また、識別子１４の表面積を大きくでき、視認性を向上させる上で有利となり、また、タイヤ成型用金型のコストダウンを図る上で有利となる。
また、第３の実施の形態によれば、サイドウォール部１２の表面１２Ａに凹部３４を設け、この凹部３４の底面１２Ｂに識別子１４を設けたので、識別子１４のサイドウォール部１２の表面１２Ａからの突出量を減少でき、タイヤ１０の空気抵抗を減少する上で有利となる。
さらに、第３の実施の形態によれば、第２部分２２の頂部２２０２が、サイドウォール部１２の表面１２Ａと同じ高さかまたはサイドウォール部１２の表面１２Ａよりも低い高さを有しているので、言い換えると、識別子１４がサイドウォール部１２の表面１２Ａから突出することがないので、タイヤ１０の空気抵抗を減少する上でより一層有利となっている。
なお、第２の実施の形態の、互いに分割された複数の第１分割体３０の集合で第１部分２０を構成し、各第１分割体３０上に設けられた第２分割体３２で第２部分２２を構成する構造を、凹部３４の底面１２Ｂ上に設けてもよいことは無論のこと、サイドウォール部１２の表面１２Ａから突出させないように設ければ、タイヤ１０の空気抵抗を減少する上でより一層有利となる。 According to the third embodiment as well, as in the first embodiment, the cross-sectional shape of the surface 12A of the sidewall portion 12 does not change abruptly at the location of the identifier 14, so that a crack is generated. This is advantageous for suppressing the surface area of the identifier 14, and the surface area of the identifier 14 can be increased, which is advantageous for improving the visibility, and is advantageous for reducing the cost of the tire molding die.
Further, according to the third embodiment, since the concave portion 34 is provided on the surface 12A of the sidewall portion 12, and the identifier 14 is provided on the bottom surface 12B of the concave portion 34, the surface 14A of the sidewall portion 12 of the identifier 14 This is advantageous in reducing the air resistance of the tire 10.
Furthermore, according to the third embodiment, the top portion 2202 of the second portion 22 has the same height as the surface 12A of the sidewall portion 12 or a height lower than the surface 12A of the sidewall portion 12. Therefore, in other words, the identifier 14 does not protrude from the surface 12A of the sidewall portion 12, which is more advantageous in reducing the air resistance of the tire 10.
In the second embodiment, the first portion 20 is constituted by a set of a plurality of first divided bodies 30 divided from each other, and the second divided bodies 32 provided on the first divided bodies 30 are used as the first parts 20. Of course, the structure constituting the two portions 22 may be provided on the bottom surface 12 </ b> B of the recess 34, and if provided so as not to protrude from the surface 12 </ b> A of the sidewall portion 12, the air resistance of the tire 10 is reduced. This is even more advantageous.

（第４の実施の形態）
図９、図１０に示すように、第４の実施の形態では、サイドウォール部１２の表面１２Ａに、表面１２Ａから窪んだ第１凹部４０が設けられ、さらに、第１凹部４０の底面４０Ｂから窪んだ第２凹部４２が設けられ、第１部分２０が第１凹部４０の底面４０Ｂで形成され、第２部分２２が第２凹部４２の底面４２Ｂで形成されている。
第１凹部４０の底面４０Ｂと第２凹部４２の底面４２Ｂは、共にサイドウォール部１２の表面１２Ａに平行する湾曲面または平坦面で形成されている。
この例でも識別子１４は、幅よりも十分に大きい寸法の長さを有する細長形状の部分の組み合わせからなり、各細長形状の部分において、第２部分２２は、第１部分２０の幅方向の中央部に設けられている。
サイドウォール部１２の表面１２Ａと第１部分２０との境の箇所は、表面１２Ａから次第に第１部分２０側に変位する第１傾斜部２４で構成され、第１部分２０と第２部分２２の境の箇所は、第１部分２０から次第に第２部分２２側に変位する第２傾斜部２６で構成されている。
このような第４の実施の形態によっても、第１の実施の形態と同様に、サイドウォール部１２の表面１２Ａの断面形状が識別子１４の箇所で急激に変化することがないので、クラックの発生を抑制する上で有利となり、また、識別子１４の表面積を大きくでき、視認性を向上させる上で有利となり、また、タイヤ成型用金型のコストダウンを図る上で有利となる。
さらに、第４の実施の形態によれば、識別子１４がサイドウォール部１２の表面１２Ａから突出することがないので、第３の実施の形態と同様に、タイヤ１０の空気抵抗を減少する上で有利となる。 (Fourth embodiment)
As shown in FIGS. 9 and 10, in the fourth embodiment, the surface 12 </ b> A of the sidewall portion 12 is provided with a first recess 40 that is recessed from the surface 12 </ b> A, and from the bottom surface 40 </ b> B of the first recess 40. A recessed second recess 42 is provided, the first portion 20 is formed by the bottom surface 40B of the first recess 40, and the second portion 22 is formed by the bottom surface 42B of the second recess 42.
Both the bottom surface 40B of the first recess 40 and the bottom surface 42B of the second recess 42 are formed as a curved surface or a flat surface parallel to the surface 12A of the sidewall portion 12.
Also in this example, the identifier 14 is composed of a combination of elongated portions having a length that is sufficiently larger than the width, and in each elongated portion, the second portion 22 is the center in the width direction of the first portion 20. Provided in the department.
The boundary portion between the surface 12A and the first portion 20 of the sidewall portion 12 is configured by a first inclined portion 24 that gradually displaces from the surface 12A to the first portion 20 side, and the first portion 20 and the second portion 22 The boundary portion includes a second inclined portion 26 that gradually displaces from the first portion 20 toward the second portion 22.
According to the fourth embodiment as well, as in the first embodiment, the cross-sectional shape of the surface 12A of the sidewall portion 12 does not change abruptly at the location of the identifier 14, so that a crack is generated. This is advantageous for suppressing the surface area of the identifier 14, and the surface area of the identifier 14 can be increased, which is advantageous for improving the visibility, and is advantageous for reducing the cost of the tire molding die.
Furthermore, according to the fourth embodiment, since the identifier 14 does not protrude from the surface 12A of the sidewall portion 12, the air resistance of the tire 10 can be reduced as in the third embodiment. It will be advantageous.

なお、上述した第１乃至第４の実施の形態において、第１傾斜部２４と第２傾斜部２６の傾斜角度を異ならせたり、あるいは、曲率の異なる湾曲面で形成するなどで、それら第１傾斜部２４、第２傾斜部２６の構造を変えると、視認性を向上させる上でより有利となる。   In the first to fourth embodiments described above, the first inclined portion 24 and the second inclined portion 26 may have different inclination angles, or may be formed with curved surfaces having different curvatures. Changing the structures of the inclined portion 24 and the second inclined portion 26 is more advantageous in improving visibility.

１２……サイドウォール部、１２Ａ……表面、１４……識別子、２０……第１部分、２２……第２部分、２４……第１傾斜部、２６……第２傾斜部、３０……第１分割体、３２……第２分割体、３４……凹部、４０……第１凹部、４２……第２凹部。   12 …… Sidewall part, 12A …… Surface, 14 …… Identifier, 20 …… First part, 22 …… Second part, 24 …… First slope part, 26 …… Second slope part, 30 …… 1st division body, 32 ... 2nd division body, 34 ... recessed part, 40 ... 1st recessed part, 42 ... 2nd recessed part.

Claims (8)

サイドウォール部の表面に設けられた識別子を有する空気入りタイヤにおいて、
前記識別子は、前記表面と直交する方向に離れた箇所に位置する第１部分と、前記第１部分に設けられ前記第１部分が前記表面から離れる方向において前記第１部分よりもさらに離れた第２部分とで構成され、
前記表面と前記第１部分との境の箇所は、前記表面から次第に前記第１部分側に変位する第１傾斜部で構成され、
前記第１部分と前記第２部分の境の箇所は、前記第１部分から次第に前記第２部分側に変位する第２傾斜部で構成されている、
空気入りタイヤ。 In the pneumatic tire having an identifier provided on the surface of the sidewall portion,
The identifier includes a first portion located at a location away from the surface in a direction orthogonal to the surface, and a first portion provided in the first portion and further away from the first portion in a direction in which the first portion is separated from the surface. It consists of two parts,
The boundary portion between the surface and the first portion is composed of a first inclined portion that gradually displaces from the surface to the first portion side,
The location of the boundary between the first part and the second part is composed of a second inclined part that gradually displaces from the first part to the second part side,
Pneumatic tire. 前記識別子が設けられた前記表面は、前記サイドウォール部の表面に設けられた凹部の底面であり、
前記第１部分は前記底面から突出し、
前記第２部分は前記第１部分から突出している、
請求項１記載の空気入りタイヤ。 The surface provided with the identifier is a bottom surface of a recess provided in the surface of the sidewall portion,
The first portion protrudes from the bottom surface;
The second portion protrudes from the first portion;
The pneumatic tire according to claim 1. 前記第２部分の頂部は、前記サイドウォール部の表面と同じ高さかまたは前記サイドウォール部の表面よりも低い高さを有している、
請求項２記載の空気入りタイヤ。 The top of the second part has the same height as the surface of the sidewall part or a lower height than the surface of the sidewall part,
The pneumatic tire according to claim 2. 前記第１部分は、互いに分割された複数の第１分割体で構成され、
前記第２部分は、各第１分割体上に設けられた第２分割体で構成されている、
請求項１乃至３に何れか１項記載の空気入りタイヤ。 The first portion is composed of a plurality of first divided bodies divided from each other,
The second part is composed of a second divided body provided on each first divided body,
The pneumatic tire according to any one of claims 1 to 3. 前記第１分割体とこの上に設けられた第２分割体とは、全て同一の形状で形成されている、
請求項４記載の空気入りタイヤ。 The first divided body and the second divided body provided thereon are all formed in the same shape,
The pneumatic tire according to claim 4. 前記第２部分は、互いに分割された複数の第２分割体で構成されている、
請求項１乃至３に何れか１項記載の空気入りタイヤ。 The second portion is composed of a plurality of second divided bodies that are divided from each other.
The pneumatic tire according to any one of claims 1 to 3. 前記第１傾斜部と前記第２傾斜部は互いに異なった形状で形成されている、
請求項１乃至６に何れか１項記載の空気入りタイヤ。 The first inclined part and the second inclined part are formed in different shapes,
The pneumatic tire according to any one of claims 1 to 6. 前記第１部分は、前記表面から窪んだ第１凹部の底面であり、前記第２部分は、前記第１凹部の底面から窪んだ第２凹部の底面である、
請求項１記載の空気入りタイヤ。 The first portion is a bottom surface of a first recess recessed from the surface, and the second portion is a bottom surface of a second recess recessed from the bottom surface of the first recess.
The pneumatic tire according to claim 1.
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JP2016538191A (en) * 2013-11-29 2016-12-08 カンパニー ジェネラレ デ エスタブリシュメンツ ミシュラン Tire with defect mask pattern on sidewall
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