JPH11291722A - Pneumatic tire provided with annular ornamental unit formed by many ridges - Google Patents
Pneumatic tire provided with annular ornamental unit formed by many ridgesInfo
- Publication number
- JPH11291722A JPH11291722A JP10091142A JP9114298A JPH11291722A JP H11291722 A JPH11291722 A JP H11291722A JP 10091142 A JP10091142 A JP 10091142A JP 9114298 A JP9114298 A JP 9114298A JP H11291722 A JPH11291722 A JP H11291722A
- Authority
- JP
- Japan
- Prior art keywords
- ridge
- tire
- pneumatic tire
- decorative body
- end edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気入りタイヤに関
するもので、特に、サイドウオールの表面に、周方向に
小さな間隔を置いて設けられた多数の小さなリッジより
なる環状の装飾体を備えた空気入りタイヤに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire, and more particularly, to a pneumatic tire having a ring-shaped decorative body formed on a surface of a sidewall and comprising a number of small ridges provided at small intervals in a circumferential direction. It is related to a tire with a tire.
【０００２】[0002]
【従来の技術】空気入りタイヤは、トロイド状またはド
ーナツ状の円環体であるが、一般に、そのカーカスは初
めから円環体として製造されるのではなく、まずシート
状に製造されたカーカス・プライがタイヤの成型ドラム
上で一周回転されて、巻初めと巻終わりの個所がジョイ
ントされることによって円環状に張り付けられる。その
後、チェーファー、ブレーカーまたはベルトおよびトレ
ッドなどの必要な構造部材が張り付けられて成型された
生タイヤが、スチールやアルミニュームなどの金属より
なるモールド内で一定時間加圧・加熱されて、加硫され
ることによってタイヤが製造されている。その結果、加
硫後のタイヤのサイドウオールには、カーカス・プライ
の巻初めと巻終わりのジョイント部に相当する個所に、
大なり小なり、凹凸が生じる。このサイドウオールの凹
凸は、タイヤの性能面や耐久面では致命的な欠陥ではな
いが、カーカス・プライが１プライよりなる乗用車用ラ
ジアル・タイヤなどでは、サイドウオールの凹凸が相対
的に顕著に目立って、顧客に要らざる不安感を与えるこ
とがある。また、空気入りタイヤは、一般に、左右一対
のビード・コアーを備えていて、カーカス・プライがこ
のビード・コアーを内側から外側に折り返されてビード
部に係留されているので、カーカス・プライの折り返し
端部がサイドウオールに位置し、その外側にサイドゴム
が配置されている。タイヤの軽量化等の要請を受けて、
サイドゴムが薄くなると、カーカス・プライの折り返し
端部がサイドウオールの凹凸として相対的に目立ってく
ることがある。2. Description of the Related Art A pneumatic tire is a toroidal or donut-shaped annular body. Generally, the carcass is not manufactured as an annular body from the beginning, but is first manufactured as a sheet-like carcass. The ply is rotated once around the forming drum of the tire and is joined in an annular shape by joining the start and end points of the winding. After that, the green tire molded by attaching necessary structural members such as chafers, breakers or belts and treads is pressed and heated for a certain period of time in a mold made of metal such as steel or aluminum, and vulcanized. By doing so, tires are manufactured. As a result, on the side wall of the vulcanized tire, at the location corresponding to the joint at the beginning and end of the carcass ply,
It becomes larger or smaller, and irregularities occur. The unevenness of the sidewall is not a fatal defect in the performance and durability of the tire, but the unevenness of the sidewall is relatively conspicuous in a radial tire for a car having one ply of carcass ply. This can give the customer unneeded anxiety. In addition, a pneumatic tire generally has a pair of left and right bead cores, and the carcass ply is folded back from the inside to the outside and moored to the bead portion, so that the carcass ply is folded back. The end is located at the side wall, and the side rubber is disposed outside the side wall. In response to requests for lighter tires,
When the side rubber becomes thin, the folded end portion of the carcass ply may become relatively conspicuous as unevenness of the sidewall.
【０００３】[0003]
【発明が解決しようとする課題】タイヤのサイドウオー
ルに形成された、文字、数字、記号又は図形などよりな
るトレードマークやトレードドレスなどを目立させるた
めに、従来から、サイドウオールの表面に、周方向に等
間隔に設けられた多数の小さな、同じ高さのリッジより
なる環状の装飾体を備え、この装飾体の上に、文字や図
形などを設けることが行われている。発明者は、タイヤ
のサイドウオールに生じる上記の凹凸を目立たなくする
ために、トレードマークやトレードドレスなどを目立た
させるために設けられた上記の小さなリッジをタイヤの
サイドウオールの広範囲にわたって形成することを思い
ついた。しかしながら、従来公知の上記のようなリッジ
をサイドウオールの広範囲にわたって形成してみたが、
結果的に、タイヤのサイドウオールに生じる上記の凹凸
を目立たなくすることにおいて、予期した効果が得られ
なかった。また、タイヤのサイドウオールにリッジを形
成するためには、モールドに凹部を形成する必要があ
り、この凹部形成加工の際バイトの刃先が次第に摩滅
し、凹部の掘り初めと掘り終わりとでは凹部の断面形状
に差が生じて、モールド一周の加工が終わったときに、
掘り初めと掘り終わりの隣接個所が不均一な模様となっ
て外観上好ましくない。Conventionally, in order to make a trade mark or a trade dress formed of letters, numbers, symbols or figures formed on a sidewall of a tire stand out, the surface of the sidewall is conventionally provided with 2. Description of the Related Art A ring-shaped decorative body composed of a number of small ridges having the same height provided at equal intervals in a circumferential direction is provided, and characters, figures, and the like are provided on the decorative body. The inventor, in order to make the above-mentioned unevenness generated in the sidewall of the tire inconspicuous, to form the above-mentioned small ridge provided to make a trademark, a trade dress, etc. conspicuous over a wide range of the sidewall of the tire. came up with. However, the conventional ridge as described above was formed over a wide area of the sidewall,
As a result, the expected effect was not obtained in making the above-mentioned unevenness generated in the sidewall of the tire inconspicuous. Further, in order to form a ridge on the sidewall of the tire, it is necessary to form a concave portion in the mold, and in the process of forming the concave portion, the cutting edge of the cutting tool gradually wears out. When a difference occurs in the cross-sectional shape and the processing around the mold is completed,
Adjacent portions at the beginning and end of the excavation have an uneven pattern, which is not preferable in appearance.
【０００４】本発明の目的は、上記のような従来技術の
不具合を解消して、タイヤのサイドウオールに生じる凹
凸を目立たなくするとともに、モールドに凹部を形成す
る際バイトの刃先が次第に摩滅し掘り初めと掘り終わり
の隣接個所に生じるタイヤの外観不良を目立たなくする
ようなリッジをサイドウオールに備えた空気入りタイヤ
を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned disadvantages of the prior art, to make the unevenness generated on the sidewall of the tire less noticeable, and to gradually reduce the cutting edge of the cutting tool when forming the concave portion in the mold. An object of the present invention is to provide a pneumatic tire provided with a ridge on a side wall so as to make inconspicuous tire appearance that occurs at adjacent portions at the beginning and end of digging.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明による空気入りタイヤは、周方向に０．３乃
至５ｍｍ程度の小さな間隔を置いて周上等間隔に設けら
れた、高さが０．３乃至２ｍｍ程度の多数の小さなリッ
ジよりなる円環状の装飾体を少なくとも一方のサイドウ
オールの表面に備えた空気入りタイヤにおいて、（１）
該リッジは、該円環状の装飾体のラジアル方向内側端縁
から外側端縁までの間で、連続して互いにほぼ平行に延
び、（２）該リッジが該円環状の装飾体のラジアル方向
内側端縁から外側端縁まで延びる間の少なくとも１カ所
にリッジ変化個所が形成され、該リッジ変化個所を境
に、ラジアル方向内側と外側とでは、該リッジの断面形
状が実質的に異なったものとなっている、ことを特徴と
する空気入りタイヤである。本発明による空気入りタイ
ヤは、このような構成のタイヤであるので、リッジが従
来のように単調なデザインではなく、断面形状が実質的
に異なったリッジが上記のように組み合わされているの
で、光と影のバランスや反射光の強弱が微妙に変化し、
視線が分散されることによって、タイヤのサイドウオー
ルに生じる前記の凹凸が目立たなくなるとともに、モー
ルドに凹部を形成する際バイトの刃先が次第に摩滅し掘
り初めと掘り終わりの隣接個所に生じるタイヤの外観不
良も目立たなくなる。In order to achieve the above-mentioned object, a pneumatic tire according to the present invention is provided with high-pneumatic tires provided at equal intervals on the circumference at small intervals of about 0.3 to 5 mm in the circumferential direction. (1) A pneumatic tire provided with an annular decorative body composed of a large number of small ridges having a thickness of about 0.3 to 2 mm on at least one side wall surface.
The ridges extend substantially parallel to each other continuously from a radially inner edge to an outer edge of the annular decorative body, and (2) the ridges extend radially inward of the annular decorative body. A ridge change portion is formed at least at one position between the edge and the outer edge, and the ridge has a substantially different cross-sectional shape radially inward and outward from the ridge change portion. The pneumatic tire is characterized in that: Since the pneumatic tire according to the present invention is a tire having such a configuration, the ridge is not a monotonous design as in the related art, but the ridges having substantially different cross-sectional shapes are combined as described above. The balance between light and shadow and the intensity of reflected light change slightly,
By dispersing the line of sight, the irregularities generated on the sidewalls of the tire become inconspicuous, and when forming the concave portion in the mold, the cutting edge of the cutting tool gradually wears out and the poor appearance of the tire occurs at the adjacent portions at the beginning and end of the excavation. Also become inconspicuous.
【０００６】上記目的を達成するために、本発明による
空気入りタイヤでは、該リッジ変化個所を境に、該リッ
ジの延びる方向がラジアル方向を挟んで逆方向となるよ
うに、該リッジが折れ線状に延びていることが、光と影
のバランスや反射光の強弱が微妙に変化して、サイドウ
オールに生じる前記の凹凸やタイヤの外観不良が目立た
なくなることに効果的であるために、好ましい。In order to achieve the above object, in the pneumatic tire according to the present invention, the ridge is bent so that the extending direction of the ridge is opposite to the radial direction with respect to the ridge change point. It is preferable that the shape of the tire is effective in that the balance between light and shadow and the intensity of reflected light are delicately changed, and the unevenness and the poor appearance of the tire, which are generated in the sidewall, are not noticeable.
【０００７】上記目的を達成するために、本発明による
空気入りタイヤでは、該リッジ変化個所を境に、該リッ
ジの断面形状が台形から三角形へ、または、三角形から
台形へ変化することが、光と影のバランスや反射光の強
弱が微妙に変化して、サイドウオールに生じる前記の凹
凸やタイヤの外観不良が目立たなくなることに効果的で
あるために、好ましい。[0007] In order to achieve the above object, in the pneumatic tire according to the present invention, at the ridge change point, the cross-sectional shape of the ridge changes from a trapezoid to a triangle or from a triangle to a trapezoid. This is preferable because it is effective in that the balance between shadows and shadows and the intensity of reflected light are subtly changed, and the above-mentioned unevenness and poor appearance of the tire caused on the sidewalls are not noticeable.
【０００８】上記目的を達成するために、本発明による
空気入りタイヤでは、光と影のバランスや反射光の強弱
が微妙に変化して、サイドウオールに生じる前記の凹凸
やタイヤの外観不良が目立たなくなることに効果的であ
るために、該リッジは、該円環状の装飾体のラジアル方
向内側端縁から外側端縁までの間で、ほぼ同じベース幅
で延びていることが好ましい。In order to achieve the above object, in the pneumatic tire according to the present invention, the balance between light and shadow and the intensity of reflected light are delicately changed, and the above-mentioned unevenness and poor appearance of the tire caused on the sidewall are conspicuous. In order to be effective in elimination, the ridge preferably extends with substantially the same base width from the radially inner edge to the outer edge of the annular ornament.
【０００９】[0009]
【発明の実施の形態】以下、本発明にしたがう実施例の
空気入りタイヤについて図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pneumatic tire according to an embodiment of the present invention will be described below with reference to the drawings.
【００１０】図１は、本発明による実施例１のタイヤの
サイドウオールに備えられた円環状装飾体Ｓの一部正面
図であって、実施例１のタイヤはサイドウオールの表面
に、周方向に０．８ｍｍ程度の小さな間隔を置いて周上
等間隔に設けられた、高さｈが０．４ｍｍ程度の多数の
小さなリッジｒよりなる円環状の装飾体Ｓを備えてい
る。リッジｒは、円環状の装飾体Ｓのラジアル方向内側
端縁Ｍから外側端縁Ｎまでの間で、連続して互いにほぼ
平行に延びて、周方向に測定したリッジ間隔がほぼ同じ
である。リッジｒが円環状の装飾体Ｓのラジアル方向内
側端縁Ｍから外側端縁Ｎまで延びる間の１カ所にリッジ
変化個所Ｃが形成され、このリッジ変化個所Ｃを境に、
ラジアル方向内側と外側とでは、ａ−ａ断面およびｂ−
ｂ断面に示されるようにリッジｒの断面形状が実質的に
異なったものとなっている。すなわち、リッジ変化個所
Ｃを境に、リッジｒの断面形状がａ−ａ断面に示すよう
な三角形から、ｂ−ｂ断面に示すような台形へ変化して
いる。また、リッジ変化個所Ｃを境に、リッジｒの延び
る方向がラジアル方向を挟んで逆方向となるように、リ
ッジｒが折れ線状に延びている。すなわち、リッジｒ
が、円環状の装飾体Ｓのラジアル方向内側端縁Ｍからリ
ッジ変化個所Ｃまでは左上がりの方向に延び、リッジ変
化個所Ｃを境にリッジｒの延びる方向がラジアル方向を
挟んで逆方向となって、リッジ変化個所Ｃから外側端縁
Ｎまでは右上がりの方向に延びている。リッジｒは、円
環状の装飾体Ｓのラジアル方向内側端縁Ｍから外側端縁
Ｎまでの間で、ほぼ同じベース幅ｗで延びている。FIG. 1 is a partial front view of an annular decorative body S provided on a side wall of a tire according to a first embodiment of the present invention. An annular decorative body S comprising a number of small ridges r having a height h of about 0.4 mm and provided at equal intervals on the periphery at small intervals of about 0.8 mm. The ridges r continuously extend substantially parallel to each other from the radial inner edge M to the outer edge N of the annular decorative body S, and the ridge intervals measured in the circumferential direction are substantially the same. A ridge change portion C is formed at one location while the ridge r extends from the radial inner edge M to the outer edge N of the annular decorative body S.
In the radially inner side and the outer side, a-a cross section and b-
The cross-sectional shape of the ridge r is substantially different as shown in the cross-section b. That is, at the ridge change point C, the cross-sectional shape of the ridge r changes from a triangle as shown in aa section to a trapezoid as shown in bb section. The ridge r extends in a polygonal line so that the ridge r extends in a direction opposite to the radial direction with the ridge change point C as a boundary. That is, the ridge r
However, the ring-shaped decorative body S extends in a left-upward direction from the radial inner edge M to the ridge change point C, and the direction in which the ridge r extends at the ridge change point C is opposite to the opposite direction across the radial direction. As a result, the portion extends from the ridge change point C to the outer edge N in an upward right direction. The ridge r extends with substantially the same base width w from the radial inner edge M to the outer edge N of the annular decorative body S.
【００１１】図２は本発明による実施例２のタイヤのサ
イドウオールに備えられた円環状装飾体Ｓの一部正面図
である。実施例２のタイヤは、リッジ変化個所Ｃを境
に、リッジｒの断面形状がｂ−ｂ断面に示すような台形
から、ａ−ａ断面に示すような三角形へ変化しているこ
とを除いて、上記実施例１のタイヤとほぼ同じである。FIG. 2 is a partial front view of an annular decorative body S provided on a sidewall of a tire according to a second embodiment of the present invention. The tire of Example 2 is different from the ridge change point C in that the cross-sectional shape of the ridge r changes from a trapezoid as shown in the bb section to a triangle as shown in the aa section. This is almost the same as the tire of the first embodiment.
【００１２】図３は本発明による実施例３のタイヤのサ
イドウオールに備えられた円環状装飾体Ｓの一部正面図
である。実施例３のタイヤは、リッジ変化個所Ｃを境
に、断面形状がａ−ａ断面に示すような三角形から、ｂ
−ｂ断面に示すような台形へ変化している実施例１のよ
うなリッジｒと、リッジ変化個所Ｃを境に、断面形状が
ｂ−ｂ断面に示すような台形から、ａ−ａ断面に示すよ
うな三角形へ変化している実施例２のようなリッジｒと
が、周方向に交互に配置されていることを除いて、上記
実施例１のタイヤとほぼ同じである。FIG. 3 is a partial front view of an annular decorative body S provided on a sidewall of a tire according to a third embodiment of the present invention. The tire of Example 3 has a cross section at a ridge change point C, a triangle having a cross-sectional shape indicated by an a-a cross section, and b
From the trapezoidal shape as shown in the bb cross section to the aa cross section, the ridge r as in the first embodiment and the ridge change point C as shown in FIG. The tire is almost the same as the tire of the first embodiment except that the ridges r as in the second embodiment, which change into the triangles as shown, are alternately arranged in the circumferential direction.
【００１３】図４は本発明による実施例４のタイヤのサ
イドウオールに備えられた円環状装飾体Ｓの一部正面図
である。実施例４のタイヤは、リッジｒが円環状の装飾
体Ｓのラジアル方向内側端縁Ｍから外側端縁Ｎまで延び
る間の４カ所にリッジ変化個所Ｃが形成されていること
を除いて、上記実施例１のタイヤとほぼ同じである。FIG. 4 is a partial front view of an annular decorative body S provided on a sidewall of a tire according to a fourth embodiment of the present invention. The tire of Example 4 has the same configuration as that of the tire described above except that the ridge r is formed at four places while the ridge r extends from the radial inner edge M to the outer edge N of the annular decorative body S. It is almost the same as the tire of the first embodiment.
【００１４】[0014]
【発明の効果】本発明の空気入りタイヤは、従来のタイ
ヤと比べ、タイヤのサイドウオールに生じる凹凸を目立
たなくするとともに、モールドに凹部を形成する際バイ
トの刃先が次第に摩滅し掘り初めと掘り終わりの隣接個
所に生じるタイヤの外観不良を抑制する効果がある。According to the pneumatic tire of the present invention, as compared with the conventional tire, the unevenness generated on the sidewall of the tire is made inconspicuous, and when the concave portion is formed in the mold, the cutting edge of the cutting tool is gradually worn and the digging is started. This has the effect of suppressing the poor appearance of the tire occurring at the end adjacent location.
【図１】本発明による実施例のタイヤの装飾体の一部正
面図である。FIG. 1 is a partial front view of a decorative body of a tire according to an embodiment of the present invention.
【図２】本発明による実施例のタイヤの装飾体の一部正
面図である。FIG. 2 is a partial front view of a decorative body of a tire according to an embodiment of the present invention.
【図３】本発明による実施例のタイヤの装飾体の一部正
面図である。FIG. 3 is a partial front view of the decorative body of the tire according to the embodiment of the present invention.
【図４】本発明による実施例のタイヤの装飾体の一部正
面図である。FIG. 4 is a partial front view of the decorative body of the tire according to the embodiment of the present invention.
ｒ リッジ Ｃ リッジ変化個所 Ｍ ラジアル方向内側端縁 Ｎ ラジアル方向外側端縁 Ｓ 円環状の装飾体 r Ridge C Ridge change point M Radial inner edge N Radial outer edge S Annular decorative body
Claims (4)
間隔を置いて設けられた、高さが０．３乃至２ｍｍ程度
の、多数の小さなリッジよりなる円環状の装飾体を、少
なくとも一方のサイドウオールの表面に備えた空気入り
タイヤにおいて、（１）該リッジは、該円環状の装飾体
のラジアル方向内側端縁から外側端縁までの間で、連続
して互いにほぼ平行に延び、（２）該リッジが該円環状
の装飾体のラジアル方向内側端縁から外側端縁まで延び
る間の少なくとも１カ所にリッジ変化個所が形成され、
該リッジ変化個所を境に、ラジアル方向内側と外側とで
は、該リッジの断面形状が実質的に異なったものとなっ
ている、ことを特徴とする空気入りタイヤ。1. An annular decorative body comprising a large number of small ridges having a height of about 0.3 to 2 mm and provided at a small interval of about 0.3 to 5 mm in a circumferential direction. In the pneumatic tire provided on the surface of the side wall of (1), (1) the ridge continuously extends substantially parallel to each other from a radially inner edge to an outer edge of the annular decorative body, (2) at least one ridge change portion is formed while the ridge extends from the radially inner edge to the outer edge of the annular decorative body;
A pneumatic tire characterized in that the ridge has a substantially different cross-sectional shape between the radially inner side and the outer side with respect to the ridge change point.
びる方向がラジアル方向を挟んで逆方向となるように、
該リッジが折れ線状に延びていることを特徴とする請求
項１記載の空気入りタイヤ。2. A method according to claim 1, wherein the ridge extends in a direction opposite to the radial direction with respect to the ridge change point.
The pneumatic tire according to claim 1, wherein the ridge extends in a polygonal line.
面形状が台形から三角形へ、または、三角形から台形へ
変化することを特徴とする請求項１乃至２記載の空気入
りタイヤ。3. The pneumatic tire according to claim 1, wherein a cross-sectional shape of the ridge changes from a trapezoid to a triangle or from a triangle to a trapezoid at the ridge change point.
ル方向内側端縁から外側端縁までの間で、ほぼ同じベー
ス幅で延びていることを特徴とする請求項１乃至３記載
の空気入りタイヤ。4. The ridge according to claim 1, wherein the ridge extends from the radially inner edge to the outer edge of the annular decorative body with substantially the same base width. Pneumatic tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10091142A JPH11291722A (en) | 1998-04-03 | 1998-04-03 | Pneumatic tire provided with annular ornamental unit formed by many ridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10091142A JPH11291722A (en) | 1998-04-03 | 1998-04-03 | Pneumatic tire provided with annular ornamental unit formed by many ridges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11291722A true JPH11291722A (en) | 1999-10-26 |
Family
ID=14018286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10091142A Pending JPH11291722A (en) | 1998-04-03 | 1998-04-03 | Pneumatic tire provided with annular ornamental unit formed by many ridges |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11291722A (en) |
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