JPH08282219A - Pneumatic tire having ornament formed by many ridges - Google Patents

Pneumatic tire having ornament formed by many ridges

Info

Publication number
JPH08282219A
JPH08282219A JP7085178A JP8517895A JPH08282219A JP H08282219 A JPH08282219 A JP H08282219A JP 7085178 A JP7085178 A JP 7085178A JP 8517895 A JP8517895 A JP 8517895A JP H08282219 A JPH08282219 A JP H08282219A
Authority
JP
Japan
Prior art keywords
curvature
radius
ridge
forms
tire
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
Application number
JP7085178A
Other languages
Japanese (ja)
Inventor
Shinobu Kikuchi
忍 菊池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP7085178A priority Critical patent/JPH08282219A/en
Publication of JPH08282219A publication Critical patent/JPH08282219A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/001Decorating, marking or the like

Abstract

PURPOSE: To make the projecting and recessed parts unobtrusive by taking the radius of curvature of the meridional section for forming the base of a ridge as the radius of curvature of a concentric circle smaller than that of the surface of a side wall, and as the radius of curvature of a non-concentric circle smaller than that of the surface of the side wall in the case of the ridge surface. CONSTITUTION: In an ornament 1 of a tire, the radius R3 of curvature of the meridional section for forming the base of a ridge R is a radius of curvature of a concentric circle smaller than the radius R1 of curvature of the meridian for forming the surface of a side wall. The radius R2 of curvature of the meridional section for forming the surface of the ridge R is a radius of curvature of a non-concentric circle smaller than the radius R1 of curvature of the meridional section for forming the surface of the side wall. In an ornament 2 of the tire, the radius R4 of curvature for forming the base of the ridge is a radius of curvature of a concentric circle smaller than the radius R6 of curvature for forming the surface of the side wall, and the radius R5 of curvature for forming the surface is a non-concentric circle smaller than the radius R6 of curvature of the side wall surface.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[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
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 decorative body composed of a large number of small ridges provided at small intervals in the circumferential direction on the surface of a side wall. It is about.

【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。さて、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、しばし
ば、文字や図形などの周囲および/または文字や図形自
体に多数の小さなリッジを設けることが行われている。
このサイドウオールに設けられた多数の小さなリッジ
は、金属よりなるモールドの内面に、予め多数の小さな
切り込み溝をローレット加工によって形成しておき、そ
のモールド内でタイヤを加硫することによって形成され
る。
2. Description of the Related Art A pneumatic tire is a toroidal or donut-shaped torus. Generally, the carcass is not manufactured as a torus from the beginning, but is first manufactured in a sheet-like carcass. The ply is rotated once on the molding drum of the tire, and is joined in an annular shape by joining the winding start and winding ends. After that, raw tires molded by attaching necessary structural members such as chafers, breakers or belts and treads are pressurized and heated for a certain period in a mold made of metal such as steel or aluminum, and then vulcanized. By doing so, the tire is manufactured. As a result, on the side wall of the tire after vulcanization, at the locations corresponding to the joints at the beginning and end of the carcass ply winding,
Larger or smaller, unevenness occurs. Although the unevenness of the side wall is not a fatal defect in terms of tire performance and durability, the unevenness of the side wall is relatively conspicuous in radial tires for passenger cars having a carcass ply of 1 ply. Therefore, it may give the customer an uneasy feeling. Now, in order to make a trademark, a trade dress, etc. formed of letters, numbers, symbols or figures formed on the side wall of a tire stand out, often around the letters and figures and / or the letters and figures themselves. Providing a large number of small ridges is practiced.
A large number of small ridges provided on this side wall are formed by forming a large number of small scoring grooves in advance on the inner surface of a metal mold by knurling and then vulcanizing the tire in the mold. .

【0003】[0003]

【発明が解決しようとする課題】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、多数の小さなリッジをタイヤのサイ
ドウオールに設けるには、上記のように金属よりなるモ
ールドの内面に、予め多数の小さな切り込み溝をローレ
ット加工などによって形成しておく必要があるが、ロー
レットのコマをモールドの内面に押し付けて金属モール
ドを加工するので、切り込み溝を広範囲にわたって形成
することが困難であり、また0.3mm程度の深さにし
か上記の切り込み溝を設けることができず、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
くすることができなかった。
DISCLOSURE OF THE INVENTION In order to make the above unevenness on the sidewall of a tire inconspicuous, the inventor has provided a tire with the above small ridge provided to make a trademark, a trade dress, or the like conspicuous. I came up with the idea of forming a wide range of sidewalls. However, in order to provide a large number of small ridges on the side wall of the tire, it is necessary to previously form a large number of small cut grooves on the inner surface of the mold made of metal as described above by knurling. Since the top is pressed against the inner surface of the mold to process the metal mold, it is difficult to form the cut groove over a wide range, and the cut groove can be provided only to a depth of about 0.3 mm. By the way
It was not possible to make the above unevenness generated on the side wall of the tire inconspicuous.

【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、ローレット加工によって充分な長さ
と深さの切り込み溝をモールドに設けることが可能とな
るようなリッジの子午線断面形状を見つけ出して、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
ることである。
An object of the present invention is to eliminate the above-mentioned problems of the prior art and to form a ridge having a sufficient length and depth in the mold by knurling so that the ridge has a meridional cross-sectional shape. In order to make the above irregularities on the tire sidewall inconspicuous.

【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、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を備えた空気入り
タイヤにおいて、(1)該リッジの底面を形成する子午
線断面の曲率半径が、サイドウオールの表面(仮想面)
を形成する子午線断面の曲率半径より小さな同心円の曲
率半径であり、(2)該リッジの表面を形成する子午線
断面の曲率半径が、サイドウオールの表面(仮想面)を
形成する子午線断面の曲率半径より小さな非同心円の曲
率半径であることを特徴とする空気入りタイヤである。
In order to achieve the above object, the pneumatic tire according to the present invention comprises a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire. In a pneumatic tire provided with a decorative body, (1) the radius of curvature of the meridional section forming the bottom surface of the ridge is the surface of the sidewall (virtual surface)
Is the radius of curvature of a concentric circle that is smaller than the radius of curvature of the meridional section that forms (2) the radius of curvature of the meridian section that forms the surface of the ridge is the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. A pneumatic tire having a smaller non-concentric radius of curvature.

【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、該リッジの底面を形成する子午線
断面の曲率半径がサイドウオールの表面(仮想面)を形
成する子午線断面の曲率半径より該リッジの高さだけ小
さいことが好ましい。
To achieve the above object, in the pneumatic tire according to the present invention, the radius of curvature of the meridional section forming the bottom surface of the ridge is smaller than that of the meridional section forming the surface (virtual surface) of the sidewall. It is preferable that the height of the ridge is small.

【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、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を備えた空気入りタイヤにおい
て、(1)該リッジの底面を形成する子午線断面の曲率
半径の向きがサイドウオールの表面(仮想面)を形成す
る子午線断面の曲率半径の向きと逆方向であり、(2)
該リッジの表面を形成する子午線断面の曲率半径が、サ
イドウオールの表面(仮想面)を形成する子午線断面の
曲率半径と同じまたは小さな同心円もしくは非同心円の
曲率半径であることを特徴とする空気入りタイヤであ
る。
In order to achieve the above object, in the pneumatic tire according to the present invention, the pneumatic tire is provided with a decoration body composed of a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire. In the filled tire, (1) the direction of the radius of curvature of the meridional section that forms the bottom surface of the ridge is opposite to the direction of the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall, and (2)
The radius of curvature of the meridional section that forms the surface of the ridge is the same or smaller than the radius of curvature of the meridional section that forms the surface (imaginary surface) of the sidewall, which is a radius of curvature of concentric circles or non-concentric circles. Tires.

【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、該リッジは周方向に0.4乃至2
mm程度の小さな間隔を置いて設けられ、該リッジは子
午線方向に対し0乃至50度程度の角度で直線状に延び
ることが好ましい。
To achieve the above object, in the pneumatic tire according to the present invention, the ridge has 0.4 to 2 in the circumferential direction.
It is preferable that the ridges are provided at intervals as small as about mm, and the ridges extend linearly at an angle of about 0 to 50 degrees with respect to the meridian direction.

【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、タイヤのサイドウオールの表面に
設けられた、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上に文字、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
スなどをを備え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, a decorative body comprising a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire is provided. It is preferable that a trademark, a trade dress, or the like, which is composed of letters, numbers, symbols, or figures, is provided on the top.

【0010】[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装飾体を備えた空気
入りタイヤにおいて、特許請求範囲1に記載したように
(1)該リッジの底面を形成する子午線断面の曲率半径
が、サイドウオールの表面(仮想面)を形成する子午線
断面の曲率半径より小さな同心円の曲率半径であり、
(2)該リッジの表面を形成する子午線断面の曲率半径
が、サイドウオールの表面(仮想面)を形成する子午線
断面の曲率半径より小さな非同心円の曲率半径であるこ
とを特徴とする空気入りタイヤ、または、特許請求範囲
3に記載したように該リッジの底面を形成する子午線断
面の曲率半径の向きがサイドウオールの表面(仮想面)
を形成する子午線断面の曲率半径の向きと逆方向である
ことを特徴とする空気入りタイヤであるので、リッジの
子午線断面形状が、ローレット加工によって充分な長さ
と深さの切り込み溝をモールドに設けることが可能とな
るような断面形状であり、したがって、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
することが可能となり、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。
The pneumatic tire according to the present invention is a pneumatic tire having a decorative body composed of a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire. As described in (1), the radius of curvature of the meridional section that forms the bottom surface of the ridge is the radius of curvature of a concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall,
(2) The pneumatic tire characterized in that the radius of curvature of the meridional section that forms the surface of the ridge is a radius of curvature of a non-concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. Alternatively, as described in claim 3, the direction of the radius of curvature of the meridional section forming the bottom surface of the ridge is the surface of the sidewall (virtual surface).
Since the pneumatic tire is characterized in that it is in the direction opposite to the direction of the radius of curvature of the meridian section that forms the ridge, the meridian section shape of the ridge is formed by knurling in the mold with a groove having a sufficient length and depth. Therefore, it is possible to form the small ridge described above over a wide range of the side wall of the tire and to disperse the line of sight so that the above-mentioned unevenness is generated in the side wall of the tire. Becomes inconspicuous.

【0011】従来は、リッジの子午線断面形状が、
(1)リッジの表面を形成する子午線断面の曲率半径
が、サイドウオールの表面(仮想面)を形成する子午線
断面の曲率半径と同一またはやや小さな同心円の曲率半
径であり、(2)リッジの底面を形成する子午線断面の
曲率半径が、サイドウオールの表面(仮想面)を形成す
る子午線断面の曲率半径よりさらに小さな同心円の曲率
半径であるので、モールド内面のローレット加工時に、
面で面を潰すことになり加工時の圧力が分散されていた
が、本発明によるモールド内面のローレット加工では、
ローレットのコマのRの頂点に圧力が集中して押し潰し
ていくので、充分な長さと深さの切り込み溝をモールド
に設けることが可能となる。すなわち、従来リッジの子
午線断面形状でのモールド内面のローレット加工では、
最大深さが0.3mm程度で、最大長さが10mm(斜
め方向の場合)乃至15mm(子午線方向の場合)程度
であったが、本発明のタイヤでは最大深さが0.6mm
程度で、最大長さが28mm程度のリッジをサイドウオ
ールの表面に設けることが可能になった。
Conventionally, the ridge meridional cross-sectional shape is
(1) The radius of curvature of the meridional section that forms the surface of the ridge is the same as or slightly smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall, and (2) the bottom surface of the ridge. Since the radius of curvature of the meridional section that forms is the radius of curvature of the concentric circles that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall, during knurling the inner surface of the mold,
Although the surface was crushed by the surface and the pressure during processing was dispersed, in the knurling of the inner surface of the mold according to the present invention,
Since the pressure is concentrated and crushed at the apex of the R of the knurled piece, it becomes possible to provide the mold with a cut groove having a sufficient length and depth. That is, in knurling the inner surface of the mold with the conventional meridian cross-sectional shape of the ridge,
The maximum depth was about 0.3 mm, and the maximum length was about 10 mm (in the diagonal direction) to 15 mm (in the meridian direction), but the maximum depth was 0.6 mm in the tire of the present invention.
It became possible to provide a ridge having a maximum length of about 28 mm on the surface of the sidewall.

【0012】[0012]

【実施例】以下、本発明にしたがう実施例1乃至2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、タイヤ・サイズは、いずれも、195/65R15
である。
EXAMPLES Tires of Examples 1 and 2 according to the present invention and tires of conventional examples will be described with reference to the drawings. The tire sizes are all 195 / 65R15.
Is.

【0013】図1は、本発明による実施例1のタイヤの
サイドウオール外輪郭を示す要部子午線断面図(右側)
および実施例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(左側)である。図1の
要部子午線断面図(右側)には、実施例1のタイヤの中
心線(C)を挟んで左側のサイドウオール外輪郭だけを
示してある。実施例1のタイヤは、そのサイドウオール
の表面に周方向に小さな間隔(P)を置いて設けられた
多数の小さなリッジ(R)よりなる装飾体(1、2)を
備えていて、装飾体(1)はタイヤの最大幅の位置
(M)近傍からラジアル方向外側に形成され、装飾体
(2)はタイヤの最大幅の位置(M)近傍からラジアル
方向内側に形成されている。実施例1のタイヤの装飾体
(1)では、リッジ(R)の底面を形成する子午線断面
の曲率半径(R3)が、サイドウオールの表面(仮想
面)を形成する子午線断面の曲率半径(R1)より小さ
な同心円の曲率半径であり、リッジ(R)の表面を形成
する子午線断面の曲率半径(R2)が、サイドウオール
の表面(仮想面)を形成する子午線断面の曲率半径(R
1)より小さな非同心円の曲率半径である。実施例1の
タイヤの装飾体(2)では、リッジ(R)の底面を形成
する子午線断面の曲率半径(R4)が、サイドウオール
の表面(仮想面)を形成する子午線断面の曲率半径(R
6)より小さな同心円の曲率半径であり、リッジ(R)
の表面を形成する子午線断面の曲率半径(R5)が、サ
イドウオールの表面(仮想面)を形成する子午線断面の
曲率半径(R6)より小さな非同心円の曲率半径であ
る。それぞれの曲率半径は、R1=60.6mm、R2
=43.2mm、R3=60mm、R4=78.6、R
5=7.3mm、R6=79.2mmである。リッジ
(R)の間隔(P)は1.2mmである。実施例1のタ
イヤの装飾体(1)のリッジ(R)の長さ(L1)は2
6mmであって、装飾体(2)の長さはリッジ(R)の
長さ(L2)は6mmである。実施例1のタイヤの装飾
体(1)および装飾体(2)では、リッジの底面を形成
する子午線断面の曲率半径(R3、R4)がサイドウオ
ールの表面(仮想面)を形成する子午線断面の曲率半径
(R1、R6)よりリッジの高さ(H)の0.6mmだ
け小さくなっている。
FIG. 1 is a cross-sectional view (right side) of a main part showing an outer contour of a side wall of a tire according to a first embodiment of the present invention.
FIG. 3 is a partial front view (left side) of a decorative body including a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire of Example 1. In the meridional sectional view of the main part (right side) of FIG. 1, only the outer contour of the side wall on the left side of the center line (C) of the tire of Example 1 is shown. The tire of Example 1 was equipped with a decorative body (1, 2) composed of a large number of small ridges (R) provided on the surface of the side wall thereof at a small interval (P) in the circumferential direction. (1) is formed radially outward from the vicinity of the maximum width position (M) of the tire, and the decorative body (2) is formed radially inward from the vicinity of the maximum width position (M) of the tire. In the tire decorative body (1) of Example 1, the radius of curvature (R3) of the meridional section that forms the bottom surface of the ridge (R) is the radius of curvature (R1) of the meridional section that forms the surface (virtual surface) of the sidewall. ) Is smaller than the radius of curvature of the concentric circles, and the radius of curvature (R2) of the meridional section that forms the surface of the ridge (R) is the radius of curvature (R2) of the meridional section that forms the surface (virtual surface) of the sidewall.
1) Smaller radius of curvature of a non-concentric circle. In the tire decorative body (2) of Example 1, the radius of curvature (R4) of the meridional section that forms the bottom surface of the ridge (R) is the radius of curvature (R4) of the meridional section that forms the surface (virtual surface) of the sidewall.
6) The radius of curvature of a smaller concentric circle, the ridge (R)
The radius of curvature (R5) of the meridional section that forms the surface of is a radius of curvature of a non-concentric circle that is smaller than the radius of curvature (R6) of the meridional section that forms the surface (virtual surface) of the sidewall. The respective radii of curvature are R1 = 60.6 mm, R2
= 43.2 mm, R3 = 60 mm, R4 = 78.6, R
5 = 7.3 mm and R6 = 79.2 mm. The interval (P) between the ridges (R) is 1.2 mm. The length (L1) of the ridge (R) of the tire decorative body (1) of Example 1 is 2
The length of the decorative body (2) is 6 mm, and the length (L2) of the ridge (R) is 6 mm. In the decorative body (1) and the decorative body (2) of the tire of Example 1, the radii of curvature (R3, R4) of the meridional section that forms the bottom surface of the ridge form the meridian section that forms the surface (virtual surface) of the sidewall. The height (H) of the ridge is smaller than the radius of curvature (R1, R6) by 0.6 mm.

【0014】図2は、本発明による実施例2のタイヤの
サイドウオール外輪郭を示す要部子午線断面図(右側)
および実施例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(左側)である。図2の
要部子午線断面図(右側)には、実施例2のタイヤの中
心線(C)を挟んで左側のサイドウオール外輪郭だけを
示してある。実施例2のタイヤは、そのサイドウオール
の表面に周方向に小さな間隔(P)を置いて設けられた
多数の小さなリッジ(R)よりなる装飾体(1、2)を
備えていて、装飾体(1)はタイヤの最大幅の位置
(M)近傍からラジアル方向外側に形成され、装飾体
(2)はタイヤの最大幅の位置(M)近傍からラジアル
方向内側に形成されている。実施例2のタイヤの装飾体
(1)では、リッジ(R)の底面を形成する子午線断面
の曲率半径(R3)が、サイドウオールの表面を形成す
る子午線断面の曲率半径(R1)の向きと逆方向であ
り、リッジ(R)の表面を形成する子午線断面の曲率半
径(R2)が、サイドウオールの表面を形成する子午線
断面の曲率半径(R1)と同一の曲率半径である。実施
例2のタイヤの装飾体(2)では、リッジ(R)の底面
を形成する子午線断面の曲率半径(R4)が、サイドウ
オールの表面(仮想面)を形成する子午線断面の曲率半
径(R6)より小さな非同心円の曲率半径であり、リッ
ジ(R)の表面を形成する子午線断面の曲率半径(R
5)が、サイドウオールの表面(仮想面)を形成する子
午線断面の曲率半径(R6)の向きと逆方向である。そ
れぞれの曲率半径は、R1=60.6mm、R2=6
0.6mm、R3=1000mm、R4=12.9、R
5=8.7mm、R6=79.2mmである。実施例1
のタイヤ同様に、リッジ(R)の間隔(P)は1.2m
mである。実施例2のタイヤの装飾体(1)のリッジ
(R)の長さ(L1)は26mmであって、装飾体
(2)の長さはリッジ(R)の長さ(L2)は6mmで
ある。
FIG. 2 is a cross-sectional view (right side) of a main part showing an outer contour of a side wall of a tire according to a second embodiment of the present invention.
5 is a partial front view (left side) of a decorative body including a large number of small ridges provided at small intervals in the circumferential direction on the surface of the sidewall of the tire of Example 2. FIG. In the meridional cross-sectional view of the main part (right side) of FIG. 2, only the outer contour of the side wall on the left side of the center line (C) of the tire of Example 2 is shown. The tire of Example 2 was provided with a decorative body (1, 2) composed of a large number of small ridges (R) provided at a small interval (P) in the circumferential direction on the surface of the sidewall of the tire. (1) is formed radially outward from the vicinity of the maximum width position (M) of the tire, and the decorative body (2) is formed radially inward from the vicinity of the maximum width position (M) of the tire. In the tire decorative body (1) of Example 2, the radius of curvature (R3) of the meridional section that forms the bottom surface of the ridge (R) is the same as the direction of the radius of curvature (R1) of the meridional section that forms the surface of the sidewall. In the opposite direction, the radius of curvature (R2) of the meridional section that forms the surface of the ridge (R) is the same as the radius of curvature (R1) of the meridional section that forms the surface of the sidewall. In the tire decorative body (2) of Example 2, the radius of curvature (R4) of the meridional section that forms the bottom surface of the ridge (R) is the radius of curvature (R6) of the meridional section that forms the surface (virtual surface) of the sidewall. ) Is smaller than the radius of curvature of a non-concentric circle, and the radius of curvature of the meridional section (R) that forms the surface of the ridge (R) (R
5) is the direction opposite to the direction of the radius of curvature (R6) of the meridional section that forms the surface (virtual surface) of the sidewall. The respective radii of curvature are R1 = 60.6 mm, R2 = 6
0.6 mm, R3 = 1000 mm, R4 = 12.9, R
5 = 8.7 mm and R6 = 79.2 mm. Example 1
Similar to the tires in, the distance (P) between the ridges (R) is 1.2m
m. The ridge (R) of the tire decorative body (1) of Example 2 had a length (L1) of 26 mm, and the ridge (R) had a length (L2) of 6 mm. is there.

【0015】図3乃至7は、本発明によりタイヤの装飾
体の変形デザイン例であって、図3は複数条のリッジを
設けた例であり、図4はタイヤの子午線方向に対し傾斜
したリッジを設けた例であり、図5はタイヤのサイドウ
オールの表面に設けられた、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上に
文字を設けた例であり、図6と図7は文字にもリッジを
設けた例である。
3 to 7 are modified design examples of a tire decorative body according to the present invention. FIG. 3 is an example in which a plurality of ridges are provided, and FIG. 4 is a ridge inclined with respect to the meridian direction of the tire. FIG. 5 shows an example in which characters are provided on a decorative body made up of a number of small ridges provided at small intervals in the circumferential direction, which are provided on the surface of a sidewall of a tire. 6 and 7 show an example in which a ridge is also provided on a character.

【0016】図8は、従来例のタイヤのサイドウオール
外輪郭を示す要部子午線断面図(右側)およびこの従来
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(左側)である。図8の要部子午線断
面図(右側)には、この従来例のタイヤの中心線(C)
を挟んで左側のサイドウオール外輪郭だけを示してあ
る。この従来例のタイヤは、サイドウオールの表面に周
方向に小さな間隔(P)を置いて設けられた多数の小さ
なリッジ(R)よりなる装飾体(1)を、タイヤの最大
幅の位置(M)近傍からラジアル方向外側に備えてい
る。図8に示す従来例のタイヤでは、リッジ(R)の子
午線断面形状が、リッジ(R)の表面を形成する子午線
断面の曲率半径(R2)が、サイドウオールの表面を形
成する子午線断面の曲率半径(R1)と同一の曲率半径
であり、リッジ(R)の底面を形成する子午線断面の曲
率半径(R3)が、サイドウオールの表面を形成する子
午線断面の曲率半径(R1)より小さな同心円の曲率半
径である。それぞれの曲率半径は、R1=60.6m
m、R2=60.6mm、R3=60.3mmである。
リッジ(R)の間隔(P)は0.6mmで、長さ(L)
は10mmで、高さ(H)は0.3mmである。
FIG. 8 is a cross-sectional view (right side) of the main part showing the outer contour of the side wall of the tire of the conventional example (right side) and the surface of the side wall of the tire of the conventional example is provided at a small interval in the circumferential direction. It is a partial front view (left side) of the ornamental body which consists of many small ridges. The central line (C) of the tire according to the conventional example is shown in the meridional sectional view (on the right side) of FIG.
Only the outside contour of the side wall on the left side is shown. In the tire of this conventional example, a decorative body (1) including a large number of small ridges (R) provided at small intervals (P) in a circumferential direction on a surface of a sidewall is provided at a position of the maximum width (M) of the tire. ) It is provided radially outward from the vicinity. In the tire of the conventional example shown in FIG. 8, the meridian section shape of the ridge (R) is such that the radius of curvature (R2) of the meridian section forming the surface of the ridge (R) is the curvature of the meridian section forming the surface of the sidewall. The radius of curvature is the same as the radius (R1), and the radius of curvature (R3) of the meridional section that forms the bottom surface of the ridge (R) is smaller than the radius of curvature (R1) of the meridional section that forms the surface of the sidewall. The radius of curvature. Each radius of curvature is R1 = 60.6m
m, R2 = 60.6 mm, R3 = 60.3 mm.
Ridge (R) spacing (P) is 0.6 mm and length (L)
Is 10 mm and the height (H) is 0.3 mm.

【0017】[0017]

【発明の効果】本発明では、ローレット加工によって充
分な長さと深さの切り込み溝をモールドに設けることが
可能となるようなリッジの子午線断面形状が得られ、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
すること可能となった。
According to the present invention, the ridge meridian cross-sectional shape is obtained by knurling so that a groove having a sufficient length and depth can be formed in the mold, and the above-mentioned unevenness formed on the side wall of the tire is obtained. It became possible to make it inconspicuous.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による実施例のタイヤのサイドウオール
外輪郭を示す要部子午線断面図(右側)および周方向に
小さな間隔を置いて設けられた多数の小さなリッジより
なる装飾体の一部正面図(左側)である。
FIG. 1 is a cross-sectional view (right side) of a main part showing an outer contour of a side wall of a tire according to an embodiment of the present invention and a front view of a part of a decorative body including a large number of small ridges arranged at small intervals in a circumferential direction. It is a figure (left side).

【図2】本発明による実施例のタイヤのサイドウオール
外輪郭を示す要部子午線断面図(右側)および周方向に
小さな間隔を置いて設けられた多数の小さなリッジより
なる装飾体の一部正面図(左側)である。
FIG. 2 is a partial meridian cross-sectional view (right side) showing an outer contour of a side wall of a tire according to an embodiment of the present invention and a part of a front surface of a decorative body including a plurality of small ridges provided at small intervals in a circumferential direction. It is a figure (left side).

【図3】本発明による、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
図である。
FIG. 3 is a partial front view of a decorative body including a large number of small ridges arranged at small intervals in the circumferential direction according to the present invention.

【図4】本発明による、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
図である。
FIG. 4 is a partial front view of a decorative body including a large number of small ridges arranged at small intervals in the circumferential direction according to the present invention.

【図5】本発明による、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
図である。
FIG. 5 is a partial front view of a decorative body including a large number of small ridges arranged at small intervals in the circumferential direction according to the present invention.

【図6】本発明による、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
図である。
FIG. 6 is a partial front view of a decorative body including a large number of small ridges arranged at small intervals in the circumferential direction according to the present invention.

【図7】本発明による、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
図である。
FIG. 7 is a partial front view of a decorative body composed of a plurality of small ridges arranged at small intervals in the circumferential direction according to the present invention.

【図8】従来例のタイヤのサイドウオール外輪郭を示す
要部子午線断面図(右側)およ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よりなる装飾体の
一部正面図(左側)である。
FIG. 8 is a meridional cross-sectional view of a main part showing an outer contour of a side wall of a tire of a conventional example (right side) and a partial front view of a decorative body including a large number of small ridges arranged at small intervals in a circumferential direction (left side). ).

【符号の説明】[Explanation of symbols]

C タイヤの中心線 H リッジの高さ M タイヤの最大幅の位置 P リッジの周方向の間隔 R リッジ 1 装飾体 2 装飾体 C tire center line H ridge height M maximum tire width position P ridge circumferential spacing R ridge 1 ornament 2 ornament

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 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
よりなる装飾体を備えた空気入りタイヤにおいて、
(1)該リッジの底面を形成する子午線断面の曲率半径
が、サイドウオールの表面(仮想面)を形成する子午線
断面の曲率半径より小さな同心円の曲率半径であり、
(2)該リッジの表面を形成する子午線断面の曲率半径
が、サイドウオールの表面(仮想面)を形成する子午線
断面の曲率半径より小さな非同心円の曲率半径であるこ
とを特徴とする空気入りタイヤ。
1. A pneumatic tire having a decorative body composed of a large number of small ridges provided at small intervals in a circumferential direction on a surface of a side wall of the tire,
(1) The radius of curvature of the meridional section that forms the bottom surface of the ridge is a radius of curvature of a concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall,
(2) The pneumatic tire characterized in that the radius of curvature of the meridional section that forms the surface of the ridge is a radius of curvature of a non-concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. .
【請求項2】 該リッジの底面を形成する子午線断面の
曲率半径がサイドウオールの表面(仮想面)を形成する
子午線断面の曲率半径より該リッジの高さだけ小さいこ
とを特徴とする請求項1記載の空気入りタイヤ。
2. The radius of curvature of the meridional section that forms the bottom surface of the ridge is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall by the height of the ridge. Pneumatic tire described.
【請求項3】 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
よりなる装飾体を備えた空気入りタイヤにおいて、該リ
ッジの底面を形成する子午線断面の曲率半径の向きがサ
イドウオールの表面(仮想面)を形成する子午線断面の
曲率半径の向きと逆方向であることを特徴とする空気入
りタイヤ。
3. A pneumatic tire having a decorative body composed of a large number of small ridges provided at small intervals in the circumferential direction on the surface of a sidewall of the tire, the meridian section forming the bottom surface of the ridge. A pneumatic tire characterized in that the direction of the radius of curvature is opposite to the direction of the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall.
【請求項4】 該リッジの表面を形成する子午線断面の
曲率半径が、サイドウオールの表面(仮想面)を形成す
る子午線断面の曲率半径と同じであることを特徴とする
請求項3記載の空気入りタイヤ。
4. The air according to claim 3, wherein the radius of curvature of the meridional section that forms the surface of the ridge is the same as the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. Included tires.
【請求項5】 該リッジの表面を形成する子午線断面の
曲率半径が、サイドウオールの表面(仮想面)を形成す
る子午線断面の曲率半径より小さな同心円の曲率半径で
あることを特徴とする請求項3記載の空気入りタイヤ。
5. The radius of curvature of the meridional section that forms the surface of the ridge is a radius of curvature of a concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. The pneumatic tire according to item 3.
【請求項6】 該リッジの表面を形成する子午線断面の
曲率半径が、サイドウオールの表面(仮想面)を形成す
る子午線断面の曲率半径より小さな非同心円の曲率半径
であることを特徴とする請求項3記載の空気入りタイ
ヤ。
6. The radius of curvature of the meridional section that forms the surface of the ridge is a radius of curvature of a non-concentric circle that is smaller than the radius of curvature of the meridional section that forms the surface (virtual surface) of the sidewall. Item 3. The pneumatic tire according to Item 3.
JP7085178A 1995-04-11 1995-04-11 Pneumatic tire having ornament formed by many ridges Pending JPH08282219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7085178A JPH08282219A (en) 1995-04-11 1995-04-11 Pneumatic tire having ornament formed by many ridges

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7085178A JPH08282219A (en) 1995-04-11 1995-04-11 Pneumatic tire having ornament formed by many ridges

Publications (1)

Publication Number Publication Date
JPH08282219A true JPH08282219A (en) 1996-10-29

Family

ID=13851415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7085178A Pending JPH08282219A (en) 1995-04-11 1995-04-11 Pneumatic tire having ornament formed by many ridges

Country Status (1)

Country Link
JP (1) JPH08282219A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10297222A (en) * 1997-04-30 1998-11-10 Bridgestone Corp Pneumatic tire comprising decoration formed by many ridges
JP2007290442A (en) * 2006-04-21 2007-11-08 Bridgestone Corp Tire
JP2008126699A (en) * 2006-11-16 2008-06-05 Toyo Tire & Rubber Co Ltd Pneumatic tire
JP2012076649A (en) * 2010-10-04 2012-04-19 Bridgestone Corp Tire
JP2012131310A (en) * 2010-12-21 2012-07-12 Yokohama Rubber Co Ltd:The Pneumatic tire
CN103895454A (en) * 2012-12-26 2014-07-02 住友橡胶工业株式会社 Pneumatic tire
CN113874227A (en) * 2019-06-03 2021-12-31 株式会社普利司通 Tyre for vehicle wheels

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10297222A (en) * 1997-04-30 1998-11-10 Bridgestone Corp Pneumatic tire comprising decoration formed by many ridges
JP2007290442A (en) * 2006-04-21 2007-11-08 Bridgestone Corp Tire
JP2008126699A (en) * 2006-11-16 2008-06-05 Toyo Tire & Rubber Co Ltd Pneumatic tire
JP2012076649A (en) * 2010-10-04 2012-04-19 Bridgestone Corp Tire
JP2012131310A (en) * 2010-12-21 2012-07-12 Yokohama Rubber Co Ltd:The Pneumatic tire
CN103895454A (en) * 2012-12-26 2014-07-02 住友橡胶工业株式会社 Pneumatic tire
EP2749435A1 (en) * 2012-12-26 2014-07-02 Sumitomo Rubber Industries, Ltd. Pneumatic tire
US9545826B2 (en) 2012-12-26 2017-01-17 Sumitomo Rubber Industries, Ltd. Pneumatic tire
CN113874227A (en) * 2019-06-03 2021-12-31 株式会社普利司通 Tyre for vehicle wheels

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