JP3667818B2 - Pneumatic tire with a decorative body consisting of many ridges - Google Patents
Pneumatic tire with a decorative body consisting of many ridges Download PDFInfo
- Publication number
- JP3667818B2 JP3667818B2 JP12862695A JP12862695A JP3667818B2 JP 3667818 B2 JP3667818 B2 JP 3667818B2 JP 12862695 A JP12862695 A JP 12862695A JP 12862695 A JP12862695 A JP 12862695A JP 3667818 B2 JP3667818 B2 JP 3667818B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- ridge
- pneumatic tire
- ridges
- tire according
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- B60C13/02—Arrangement of grooves or ribs
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
【０００１】
【産業上の利用分野】
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。
【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。
【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。
【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防止または抑制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。
【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、タイヤの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円環状の装飾体を備えた空気入りタイヤにおいて、前記多数のリッジは、サイドウォール表面の凹凸が目立たなくなるように、直線状でかつタイヤの子午線に対して０乃至７０度の角度でタイヤ径方向に連続する高さの異なる２種類のリッジを交互配置することで構成されており、高さが０．３乃至２ｍｍ、周方向間隔が０．３乃至５ｍｍである、ことを特徴とする空気入りタイヤである。
【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、該リッジがタイヤの子午線に対して０乃至７０度の角度で延び、特に、０乃至４０度の角度で延びていることが好ましい。
【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、該リッジの最高部を連ねる仮想面が、サイドウオールの表面（仮想面）と同一であることが好ましい。
本明細書では、「サイドウオールの表面（仮想面）」とは、円環状の装飾体にリッジが形成されていなければタイヤの表面の円環状の装飾体の位置に存在したであろうところのサイドウオールの表面を指す。
また、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、該リッジと隣接するリッジとの間に形成される凹部の底面がサイドウオールの表面（仮想面）と同一であることを特徴とする空気入りタイヤが好ましい。
本明細書では、「隣接するリッジ間の凹部の底面」とは、正確に言えば、該凹部の最深部を連ねる仮想面である。
【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、該リッジの断面形状が相似形であることが好ましい。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、該リッジの側壁角度が同一で、さらに特定すれば側壁角度が４５度であることが好ましい。
【０００９】
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、高さが異なる２種類の該リッジの高さの差が０．３乃至１ｍｍであることが好ましい。
【００１０】
【作用】
本発明による空気入りタイヤは、タイヤの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円環状の装飾体を備えた空気入りタイヤにおいて、前記多数のリッジは、直線状で、かつタイヤの子午線に対して０乃至７０度の角度でタイヤ径方向に連続する高さの異なる２種類のリッジを交互配置することで構成されており、高さが０．３乃至２ｍｍ、周方向間隔が０．３乃至５ｍｍであり、リッジの高さが従来のように一定ではなく、高いリッジと低いリッジが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。また、上記のような本発明による空気入りタイヤを製造するためのモールドにタイヤのリッジに相当するモールドの凹部を加工する際、深い凹部を先に全周加工し、次いで浅い凹部を後から全周加工することで、加工効率が高くなる。直線状のリッジがタイヤの子午線に対して０乃至７０度、好ましくは０乃至４０度の角度でタイヤ径方向に連続していることが、光と影のバランスや反射光の強弱が微妙に変化に効果的である。
【００１１】
サイドウオールの表面にリッジを設けた本発明による空気入りタイヤを製造するためには、モールドの内面に該リッジに相当する凹部を形成しておいて、そのモールドでタイヤを加硫する必要がある。モールドの内面に該リッジに相当する凹部を形成するには、モールドの内面に該凹部を直接形成するか、または、円環状の装飾体に相当する部分をモールドの内面に予め突出させておいてその突出部分に該凹部を形成するか、どちらかのモールド加工方法が採用される。前者の加工方法では、バイトの刃先が逃げる空間が必要であり、円環状の装飾体に相当する部分の上下に溝を掘る必要があるが、後者の加工方法ではバイトの刃先が自由に逃げることができるので、そのような必要がない。どちらの加工方法が好ましいかは、円環状の装飾体に形成されるリッジのデザイン如何に拠る。換言すれば、リッジのデザインに応じてタイヤの外観上どちらの加工方法が好ましいかが選択されることになる。また、後者の加工方法では、円環状の装飾体に相当する部分についてはサイドウオールのゴム量を減少することが可能であり、若干ではあるがタイヤ重量低減につながる。一方、既にほぼ限界までサイドウオールのゴム厚さを薄くしてあるタイヤでは、後者の加工方法ではコードが露出する恐れがあり、前者の加工方法が安全である。後者の加工方法によるモールドでタイヤを加硫する場合、本発明による空気入りタイヤでは、該リッジの最高部を連ねる仮想面が、サイドウオールの表面（仮想面）と同一であることが好ましい。前者の加工方法によるモールドでタイヤを加硫する場合、本発明による空気入りタイヤでは、リッジと隣接するリッジとの間に形成される凹部の底面がサイドウオールの表面（仮想面）と同一であることが好ましい。同様に、モールド加工の作業の容易さと言う観点から、リッジの断面形状が相似形でリッジの側壁角度が同一で、さらに特定すれば側壁角度が４５度であることが好ましい。
【００１２】
【実施例】
以下、本発明にしたがう実施例１乃至３のタイヤ及び従来例のタイヤについて図面を参照して説明する。
【００１３】
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装飾体の一部正面図およびＡ−Ａ断面図である。
実施例１のタイヤは、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（Ｒ1 、Ｒ2 ）よりなる円環状の装飾体を備え、低いリッジ（Ｒ1 ）がタイヤの子午線に対して３５度の角度で延び、高いリッジ（Ｒ2 ）もおおむね同じ角度で延びているが、装飾体のラジアル方向内側端部および外側端部近傍で３０ｍｍの曲率半径で方向が図示のように変化している。低いリッジ（Ｒ1 ）と高いリッジ（Ｒ2 ）が交互に周方向に配置され、その周方向間隔は２ｍｍであり、低いリッジ（Ｒ1 ）の高さ（Ｈ1 ）が０．３ｍｍであり、高いリッジ（Ｒ2 ）の高さが（Ｈ2 ）０．６ｍｍで、リッジの高さの差が０．３ｍｍである。
リッジ（Ｒ1 、Ｒ2 ）と隣接するリッジ（Ｒ1 、Ｒ2 ）との間に形成される凹部の底面がサイドウオールの表面（仮想面）と同一である。低いリッジ（Ｒ1 ）も高いリッジ（Ｒ2 ）も、その側壁角度が４５度である。
【００１４】
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装飾体の一部正面図およびＡ−Ａ断面図である。
実施例２のタイヤは、低いリッジ（Ｒ1 ）がタイヤの子午線に対して０度の角度で直線状に延び、高いリッジ（Ｒ2 ）はタイヤの子午線に対して若干傾斜した角度で直線状に延びていること、２つの低いリッジ（Ｒ1 ）と１つの高いリッジ（Ｒ2 ）が順次周方向に配置され、低いリッジ（Ｒ1 ）の周方向間隔は０．６ｍｍで、低いリッジ（Ｒ1 ）と高いリッジ（Ｒ2 ）の周方向間隔は２ｍｍであることを除いて、ほぼ実施例１のタイヤと同じである。
【００１５】
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装飾体の一部正面図およびＡ−Ａ断面図である。
実施例３のタイヤは、リッジ（Ｒ1 、Ｒ2 ）がタイヤの子午線に対して０度の角度で直線状に延びていること、リッジ（Ｒ1 、Ｒ2 ）の周方向間隔は１．０ｍｍで、低いリッジ（Ｒ1 ）の高さ（Ｈ1 ）が０．２５ｍｍで高いリッジ（Ｒ2 ）の高さ（Ｈ2 ）が０．５ｍｍで、リッジの高さの差が０．２５ｍｍであることを除いて、ほぼ実施例２のタイヤと同じである。
【００１６】
図４は、従来例のタイヤの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装飾体の一部正面図およびＡ−Ａ断面図である。
従来例のタイヤは、サイドウオールの表面に、タイヤの子午線に対して０度の角度で延び、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（Ｒ）よりなる円環状の装飾体を備え、リッジ（Ｒ）の周方向間隔は２ｍｍであり、高さ（Ｈ）が０．４ｍｍである。
【００１７】
図５乃至８は、本発明によりタイヤの装飾体の変形デザイン例である。
【００１８】
実施例１乃至３のタイヤおよびリッジなしの従来例１のタイヤと図４に示す従来例２のタイヤについて、タイヤのサイドウオールに生じている凹凸がどの程度目立つかを目視によって評価した。その評価結果を、リッジなしの従来例１のタイヤの評価結果を１００として、表１に示す。数字が大きいほど目視性が優れていることを示す。
実施例１乃至３のタイヤおよび従来例１乃至２のタイヤについて、タイヤのサイドウオールに生じている凹凸がどの程度目立つかを目視によって評価した。その評価結果を、従来例１のタイヤの評価結果を１００として、表１に示す。数字が大きいほど目視性が優れていることを示す。
同様に、実施例１乃至３のタイヤおよび従来例２のタイヤについて、モールド加工時のバイトの刃先の摩滅によるタイヤの外観不良がどの程度目立つかを目視によって評価した。その評価結果を、従来例２のタイヤの評価結果を１００として、表１に示す。数字が大きいほど目視性が優れていることを示す。
【００１９】
【表１】
【発明の効果】
表１に示す結果から、本発明の空気入りタイヤは、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ことが優れていることが分かる。
【図面の簡単な説明】
【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とＡ−Ａ断面図である。
【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とＡ−Ａ断面図である。
【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とＡ−Ａ断面図である。
【図４】従来例のタイヤの、装飾体の一部正面図とＡ−Ａ断面図である。
【図５】本発明によりタイヤの装飾体の変形デザイン例である。
【図６】本発明によりタイヤの装飾体の変形デザイン例である。
【図７】本発明によりタイヤの装飾体の変形デザイン例である。
【図８】本発明によりタイヤの装飾体の変形デザイン例である。
【符号の説明】
Ｈ リッジの高さ
Ｈ1 低いリッジの高さ
Ｈ2 高いリッジの高さ
Ｒ リッジ
Ｒ1 低いリッジ
Ｒ2 高いリッジ[0001]
[Industrial application fields]
The present invention relates to a pneumatic tire, and more particularly to a pneumatic tire provided with an annular decorative body made up of a large number of small ridges provided on the surface of a side wall at small intervals in the circumferential direction.
[0002]
[Prior art]
A pneumatic tire is a toroidal or donut-shaped torus, but in general, the carcass is not manufactured as a torus from the beginning, but first the carcass ply manufactured in the form of a sheet is molded into the tire. It is rotated around the drum and is pasted in an annular shape by jointing the beginning and end of the winding. After that, raw tires molded by attaching necessary structural members such as chafers, breakers or belts and treads are pressed and heated for a certain period of time in a mold made of metal such as steel or aluminum, and vulcanized. Thus, a tire is manufactured.
As a result, the side wall of the vulcanized tire is more or less uneven at portions corresponding to the joints at the beginning and end of the carcass ply. The unevenness of the side wall is not a fatal defect in terms of performance and durability of the tire, but the unevenness of the side wall is relatively conspicuous in a radial tire for a passenger car with one carcass ply. Can cause unnecessary anxiety to customers.
In general, a pneumatic tire 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. The end portion is located on the side wall, and the side rubber is disposed on the outside thereof. When the side rubber becomes thin in response to a request for weight reduction of the tire, the folded end portion of the carcass ply may become relatively conspicuous as the unevenness of the side wall.
[0003]
[Problems to be solved by the invention]
Conventionally, on the surface of the side wall, it has been provided at equal intervals in the circumferential direction in order to make a trademark or a trade dress made up of letters, numbers, symbols or figures formed on the side wall of the tire stand out. A large number of small ring-shaped decorative bodies made of ridges having the same height are provided, and characters and figures are provided on the decorative body.
In order to make the unevenness generated in the tire side wall inconspicuous, the inventor has to form the small ridge provided to make a trademark, a trade dress, etc. conspicuous over a wide range of the tire side wall. came up with.
However, the conventional ridges as described above were formed over a wide area of the side wall, but as a result, the expected effect was not obtained in making the above unevenness generated in the side wall of the tire inconspicuous. .
In addition, in order to form a ridge on the tire sidewall, it is necessary to form a recess in the mold, and the cutting edge of the cutting tool gradually wears during the recess forming process, and the recess is not formed at the beginning and end of the recess. When a difference occurs in the cross-sectional shape and the processing of one round of the mold is finished, the adjacent portions at the beginning and the end of the digging become a non-uniform pattern, which is not preferable in appearance.
[0004]
The object of the present invention is to eliminate the above-mentioned problems of the prior art and to make the unevenness generated in the tire sidewall inconspicuous, and when the recess is formed in the mold, the cutting edge of the bite is gradually worn out and dug at the beginning It is an object of the present invention to provide a pneumatic tire having a side wall with a ridge that prevents or suppresses a poor appearance of the tire that occurs at an adjacent portion at the end.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a pneumatic tire according to the present invention is an air equipped with an annular decorative body composed of a large number of small ridges provided at small intervals in the circumferential direction on the surface of a tire sidewall. In the entering tire, the above-mentioned many ridges are linear and have two different heights in the tire radial direction at an angle of 0 to 70 degrees with respect to the meridian of the tire so that the unevenness of the sidewall surface becomes inconspicuous. The pneumatic tire is configured by alternately arranging the ridges, and has a height of 0.3 to 2 mm and a circumferential interval of 0.3 to 5 mm.
[0006]
In order to achieve the above object, in the pneumatic tire according to the present invention, it is preferable that the ridge extends at an angle of 0 to 70 degrees with respect to the meridian of the tire, and in particular, extends at an angle of 0 to 40 degrees.
[0007]
In order to achieve the above object, in the pneumatic tire according to the present invention, it is preferable that the virtual surface connecting the highest portions of the ridge is the same as the surface (virtual surface) of the sidewall.
In this specification, the “surface of the side wall (virtual surface)” means that if the rim is not formed on the annular decorative body, it would have existed at the position of the annular decorative body on the surface of the tire. Refers to the side wall surface.
In order to achieve the above object, in the pneumatic tire according to the present invention, the bottom surface of the recess formed between the ridge and the adjacent ridge is the same as the surface (virtual surface) of the side wall. A pneumatic tire is preferred.
In the present specification, the “bottom surface of the concave portion between adjacent ridges” is a virtual surface connecting the deepest portion of the concave portion to be precise.
[0008]
In order to achieve the above object, in the pneumatic tire according to the present invention , it is preferable that the cross-sectional shape of the ridge is similar . In order to achieve the above object, in the pneumatic tire according to the present invention, the side wall angle of the ridge is preferably the same , and more specifically, the side wall angle is preferably 45 degrees.
[0009]
In order to achieve the above object, in the pneumatic tire according to the present invention, it is preferable that the height difference between the two types of ridges having different heights is 0.3 to 1 mm.
[0010]
[Action]
The pneumatic tire according to the present invention is a pneumatic tire provided with an annular decorative body made of a large number of small ridges provided at small intervals in the circumferential direction on the surface of a sidewall of the tire. Is configured by alternately arranging two types of ridges having different heights that are continuous in the tire radial direction at an angle of 0 to 70 degrees with respect to the meridian of the tire. 3 to 2 mm, circumferential spacing is 0.3 to 5 mm, the height of the ridge is not constant as in the past, and a high ridge and a low ridge are combined. When the strength changes slightly and the line of sight is dispersed, the unevenness generated in the tire sidewall becomes inconspicuous, and the cutting edge of the cutting tool gradually forms when forming the recess in the mold. Flashes digging tire appearance defect also becomes inconspicuous that occur in adjacent locations of the end digging the beginning. Further, when processing the recess of the mold corresponding to the ridge of the tire into the mold for producing the pneumatic tire according to the present invention as described above, the deep recess is first processed all around, and then the shallow recess is completely removed later. Machining efficiency is increased by circumferential machining. The straight ridges are continuous in the tire radial direction at an angle of 0 to 70 degrees, preferably 0 to 40 degrees with respect to the meridian of the tire, so that the balance between light and shadow and the intensity of reflected light change slightly. It is effective.
[0011]
In order to manufacture the pneumatic tire according to the present invention in which a ridge is provided on the surface of the side wall, it is necessary to form a recess corresponding to the ridge on the inner surface of the mold and vulcanize the tire with the mold. . In order to form a concave portion corresponding to the ridge on the inner surface of the mold, the concave portion is directly formed on the inner surface of the mold, or a portion corresponding to an annular decorative body is projected in advance on the inner surface of the mold. Either of the mold processing methods is adopted in which the concave portion is formed in the protruding portion. In the former processing method, a space for the cutting edge of the cutting tool to escape is necessary, and it is necessary to dig a groove above and below the part corresponding to the annular decorative body, but in the latter processing method, the cutting edge of the cutting tool is free to escape. You do n’t need to. Which processing method is preferable depends on the design of the ridge formed on the annular decorative body. In other words, which processing method is preferable in terms of the appearance of the tire is selected according to the design of the ridge. Further, in the latter processing method, the rubber amount of the sidewall can be reduced for the portion corresponding to the annular decorative body, which leads to a reduction in the tire weight, though slightly. On the other hand, in a tire where the rubber thickness of the side wall has already been reduced to the limit, the cord may be exposed by the latter processing method, and the former processing method is safe. When the tire is vulcanized with a mold by the latter processing method, in the pneumatic tire according to the present invention, it is preferable that the virtual surface connecting the highest portion of the ridge is the same as the surface (virtual surface) of the sidewall. In the case of vulcanizing a tire with a mold by the former processing method, in the pneumatic tire according to the present invention, the bottom surface of the recess formed between the ridge and the adjacent ridge is the same as the surface (virtual surface) of the side wall. It is preferable. Similarly, from the viewpoint of ease of molding work, it is preferable that the cross-sectional shape of the ridge is similar and the side wall angle of the ridge is the same, and more specifically, the side wall angle is 45 degrees.
[0012]
【Example】
Hereinafter, tires of Examples 1 to 3 and a conventional tire according to the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a partial front view and a cross-sectional view taken along line AA of a decorative body made up of a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire according to the first embodiment of the present invention. is there.
The tire of Example 1 includes an annular decorative body made up of a large number of small ridges (R1, R2) provided at small intervals in the circumferential direction on the surface of the sidewall, and the low ridge (R1) is the tire. It extends at an angle of 35 degrees with respect to the meridian, and the high ridge (R2) also extends at approximately the same angle, but the direction is shown with a radius of curvature of 30 mm near the radially inner and outer edges of the ornament. Has changed. The low ridge (R1) and the high ridge (R2) are alternately arranged in the circumferential direction, the circumferential interval is 2 mm, the height (H1) of the low ridge (R1) is 0.3 mm, and the high ridge ( The height of (R2) is (H2) 0.6 mm, and the height difference of the ridge is 0.3 mm.
The bottom surface of the recess formed between the ridge (R1, R2) and the adjacent ridge (R1, R2) is the same as the surface (virtual surface) of the sidewall. Both the low ridge (R1) and the high ridge (R2) have a sidewall angle of 45 degrees.
[0014]
FIG. 2 is a partial front view and a cross-sectional view taken along line AA of a decorative body made up of a large number of small ridges provided on the surface of the sidewall of the tire of Example 2 according to the present invention at small intervals in the circumferential direction. is there.
In the tire of Example 2, the low ridge (R1) extends linearly at an angle of 0 degrees with respect to the meridian of the tire, and the high ridge (R2) extends linearly at an angle slightly inclined with respect to the meridian of the tire. Two low ridges (R1) and one high ridge (R2) are sequentially arranged in the circumferential direction, and the circumferential interval between the low ridges (R1) is 0.6 mm, and the low ridge (R1) and the high ridge (R2) is substantially the same as the tire of Example 1 except that the circumferential interval is 2 mm.
[0015]
FIG. 3 is a partial front view and a cross-sectional view taken along line AA of a decorative body made up of a large number of small ridges provided on the surface of the side wall of the tire of Example 3 according to the present invention at small intervals in the circumferential direction. is there.
In the tire of Example 3, the ridges (R1, R2) extend linearly at an angle of 0 degrees with respect to the meridian of the tire, and the circumferential distance between the ridges (R1, R2) is as low as 1.0 mm. The height (H1) of the ridge (R1) is 0.25 mm, the height (H2) of the high ridge (R2) is 0.5 mm, and the difference in height between the ridges is 0.25 mm. This is the same as the tire of Example 2.
[0016]
FIG. 4 is a partial front view and a cross-sectional view taken along line AA of a decorative body made up of a large number of small ridges provided on the surface of a sidewall of a conventional tire at a small interval in the circumferential direction.
The tire of the conventional example is an annular decorative body comprising a large number of small ridges (R) provided on the surface of the sidewall at an angle of 0 degrees with respect to the meridian of the tire and provided at small intervals in the circumferential direction. The ridge (R) has a circumferential interval of 2 mm and a height (H) of 0.4 mm.
[0017]
FIGS. 5 to 8 are examples of modified designs of tire decorative bodies according to the present invention.
[0018]
For the tires of Examples 1 to 3 and the tire of Conventional Example 1 without a ridge and the tire of Conventional Example 2 shown in FIG. 4, the degree of concavity and convexity generated on the tire sidewall was visually evaluated. The evaluation results are shown in Table 1 with the evaluation result of the tire of Conventional Example 1 having no ridge as 100. Larger numbers indicate better visibility.
For the tires of Examples 1 to 3 and the tires of Conventional Examples 1 and 2, the degree to which the unevenness generated in the tire sidewalls was noticeable was visually evaluated. The evaluation results are shown in Table 1 with the evaluation result of the tire of Conventional Example 1 being 100. Larger numbers indicate better visibility.
Similarly, for the tires of Examples 1 to 3 and the tire of Conventional Example 2, the degree to which the appearance defect of the tire due to abrasion of the cutting edge of the cutting tool during molding was noticed was visually evaluated. The evaluation results are shown in Table 1 with the evaluation result of the tire of Conventional Example 2 as 100. Larger numbers indicate better visibility.
[0019]
[Table 1]
【The invention's effect】
From the results shown in Table 1, the pneumatic tire of the present invention makes the unevenness generated in the tire sidewall inconspicuous, and the cutting edge of the bite gradually wears when forming the recess in the mold, and adjacent portions at the beginning and end of digging. It can be seen that it is excellent to suppress the appearance defect of the tire occurring in the above.
[Brief description of the drawings]
FIG. 1 is a partial front view and AA cross-sectional view of a decorative body of a tire according to an embodiment of the present invention.
FIG. 2 is a partial front view and AA cross-sectional view of a decorative body of a tire according to an embodiment of the present invention.
FIG. 3 is a partial front view and AA cross-sectional view of a decorative body of a tire according to an embodiment of the present invention.
FIG. 4 is a partial front view and AA cross-sectional view of a decorative body of a conventional tire.
FIG. 5 is a modified design example of a tire decorative body according to the present invention.
FIG. 6 is a modified design example of a tire decorative body according to the present invention.
FIG. 7 is a modified design example of a tire decorative body according to the present invention.
FIG. 8 is a modified design example of a tire decorative body according to the present invention.
[Explanation of symbols]
H Ridge height H1 Low ridge height H2 High ridge height R Ridge R1 Low ridge R2 High ridge
Claims (9)
前記多数のリッジは、サイドウォール表面の凹凸が目立たなくなるように、直線状でかつタイヤの子午線に対して０乃至７０度の角度でタイヤ径方向に連続する高さの異なる２種類のリッジを交互配置することで構成されており、高さが０．３乃至２ｍｍ、周方向間隔が０．３乃至５ｍｍである、ことを特徴とする空気入りタイヤ。In the pneumatic tire provided with an annular decorative body made of a large number of small ridges provided on the surface of the side wall at small intervals in the circumferential direction,
The plurality of ridges are two types of ridges that are linear and have different heights in the tire radial direction at an angle of 0 to 70 degrees with respect to the meridian of the tire so that the unevenness of the sidewall surface becomes inconspicuous. A pneumatic tire characterized by being arranged and having a height of 0.3 to 2 mm and a circumferential interval of 0.3 to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12862695A JP3667818B2 (en) | 1995-05-26 | 1995-05-26 | Pneumatic tire with a decorative body consisting of many ridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12862695A JP3667818B2 (en) | 1995-05-26 | 1995-05-26 | Pneumatic tire with a decorative body consisting of many ridges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08318716A JPH08318716A (en) | 1996-12-03 |
| JP3667818B2 true JP3667818B2 (en) | 2005-07-06 |
Family
ID=14989460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12862695A Expired - Lifetime JP3667818B2 (en) | 1995-05-26 | 1995-05-26 | Pneumatic tire with a decorative body consisting of many ridges |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3667818B2 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5645660A (en) * | 1995-06-28 | 1997-07-08 | The Goodyear Tire & Rubber Company | Design patterns for a tire sidewall |
| JP3946850B2 (en) * | 1998-01-14 | 2007-07-18 | 株式会社ブリヂストン | Pneumatic tire with an annular decorative body consisting of many ridges |
| JP3422715B2 (en) * | 1999-03-10 | 2003-06-30 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP4315515B2 (en) * | 1999-03-30 | 2009-08-19 | 株式会社ブリヂストン | Pneumatic tire |
| JP3980946B2 (en) * | 2002-06-17 | 2007-09-26 | 住友ゴム工業株式会社 | tire |
| JP4017457B2 (en) * | 2002-07-04 | 2007-12-05 | 横浜ゴム株式会社 | Pneumatic tire |
| JP4862684B2 (en) | 2006-05-30 | 2012-01-25 | 横浜ゴム株式会社 | Molding mold for tire vulcanization |
| JP5054948B2 (en) * | 2006-09-05 | 2012-10-24 | 株式会社ブリヂストン | tire |
| JP5343961B2 (en) * | 2010-12-21 | 2013-11-13 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5494518B2 (en) * | 2011-02-07 | 2014-05-14 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5588482B2 (en) * | 2012-08-10 | 2014-09-10 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5702768B2 (en) * | 2012-12-26 | 2015-04-15 | 住友ゴム工業株式会社 | Pneumatic tire |
| BR112015032833A2 (en) | 2013-07-01 | 2017-07-25 | Bridgestone Americas Tire Operations Llc | Methods and Apparatus for Creating a Visual Effect on a Rubber Article |
| JP5913229B2 (en) * | 2013-08-09 | 2016-04-27 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6754577B2 (en) * | 2016-02-03 | 2020-09-16 | 株式会社ブリヂストン | tire |
| JP6805680B2 (en) * | 2016-09-26 | 2020-12-23 | 住友ゴム工業株式会社 | Pneumatic tires |
| JP7151226B2 (en) * | 2018-07-10 | 2022-10-12 | 住友ゴム工業株式会社 | tire |
| WO2021024725A1 (en) * | 2019-08-05 | 2021-02-11 | 横浜ゴム株式会社 | Pneumatic tire |
-
1995
- 1995-05-26 JP JP12862695A patent/JP3667818B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08318716A (en) | 1996-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3667818B2 (en) | Pneumatic tire with a decorative body consisting of many ridges | |
| JPH11291722A (en) | Pneumatic tire provided with annular ornamental unit formed by many ridges | |
| JP3946850B2 (en) | Pneumatic tire with an annular decorative body consisting of many ridges | |
| JPH11321243A (en) | Pneumatic tire with annular decorative body consisting of semispherical projections | |
| JPH0743621U (en) | tire | |
| JP3831072B2 (en) | Pneumatic tire with a decorative body consisting of many ridges | |
| JPH08318717A (en) | Pneumatic tire provided with decoration body consisting of multiple ridge | |
| JPH11291721A (en) | Pneumatic tire provided with annular ornamental unit formed by many ridges | |
| US4279286A (en) | Pneumatic tires having ornamented sidewalls, and to their manufacture | |
| JPH0939518A (en) | Pneumatic tire provided with ornamental body of numbers of ridges | |
| JP3645358B2 (en) | Pneumatic tire with a decorative body consisting of many ridges | |
| JP4502437B2 (en) | Pneumatic tire | |
| US4442618A (en) | Decorative ornamentation for a rubber article and method for making same | |
| JPH0948217A (en) | Pneumatic tire having decorative body constituted of many ridges | |
| JP4315515B2 (en) | Pneumatic tire | |
| JP3720527B2 (en) | Pneumatic tire with a decorative body consisting of many ridges | |
| JP2000118208A (en) | Pneumatic tire provided with many rectangular decorative bodies | |
| JP4070308B2 (en) | Pneumatic tire with grooves extending from the tread pattern on the side wall surface | |
| JP6610718B1 (en) | Pneumatic tire | |
| JP3563517B2 (en) | Pneumatic tire with ring decoration consisting of many ridges | |
| JPH08282219A (en) | Pneumatic tire having ornament formed by many ridges | |
| JP3240200B2 (en) | Tire molding method | |
| JPH11321242A (en) | Pneumatic tire with annular decorative body consisting of a number of semispherical projections | |
| USD1004539S1 (en) | Sidewall | |
| EP0916524A3 (en) | Pneumatic radial tires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040511 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040712 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040907 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20041108 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20041119 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050405 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050407 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090415 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090415 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100415 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110415 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120415 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130415 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130415 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140415 Year of fee payment: 9 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |