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JPH0592709A - High speed and heavy load tire - Google Patents

High speed and heavy load tire

Info

Publication number
JPH0592709A
JPH0592709A JP34030491A JP34030491A JPH0592709A JP H0592709 A JPH0592709 A JP H0592709A JP 34030491 A JP34030491 A JP 34030491A JP 34030491 A JP34030491 A JP 34030491A JP H0592709 A JPH0592709 A JP H0592709A
Authority
JP
Japan
Prior art keywords
rubber
bead
tire
modulus
height
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
JP34030491A
Other languages
Japanese (ja)
Inventor
Kiyoshi Kamiyoko
清志 上横
Mikio Takatsu
幹雄 高津
Hiroshi Hoshino
博志 星野
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.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries Ltd
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 Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Publication of JPH0592709A publication Critical patent/JPH0592709A/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
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/0009Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
    • B60C15/0072Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion with ply reverse folding, i.e. carcass layer folded around the bead core from the outside to the inside
    • 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
    • B60C1/00Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C1/0025Compositions of the sidewalls
    • 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
    • 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
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/0009Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
    • B60C15/0018Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion not folded around the bead core, e.g. floating or down ply
    • 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
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • 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
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0603Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the bead filler or apex
    • B60C15/0607Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the bead filler or apex comprising several parts, e.g. made of different rubbers
    • 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
    • B60C15/00Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C2015/0614Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

PURPOSE:To reduce bending deformation and heat generation in a bead part, suppress damages of chafing or the like, and improve the bead durability in the basic design where the outside rubber is divided into a chafer rubber and a side wall rubber which are provided with specified moduli respectively. CONSTITUTION:A tire is provided with at least an outside rubber 17 forming the outside surface of a tire from the bottom side surface of a bead part to a side well part. The outside rubber 17 is divided into a chafer rubber 20 including a region (Y) which is brought into contact with a flange RA of a regular rim (R) in the 200% load condition, and a side wall rubber 21 located above the chafer rubber. The respective 100% module MP, MA, MC, MS of the side packing rubber 15, the bead apex rubber 9, the chafer rubber 20 and the side wall rubber 21 are set to 53-95kg/cm<2>, 78-120kg/cm<2>, 40-70kg/cm<2>, 10-45kg/cm<2>, in order. The respective moduli are set to satisfy the relationship MS<MC<MP<MA.

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、ビード変形及びビード
発熱を低減しうるとともに、リムチェーフィング等の外
傷の発生を抑制でき、ビード耐久性を向上しうる高速重
荷重用タイヤに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed heavy-duty tire capable of reducing bead deformation and heat generation of bead, suppressing damage such as rim chafing, and improving bead durability.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】近年、
高荷重、高速条件で使用されるタイヤ、例えば航空機用
タイヤにおいても構造耐久性能、走行性能、燃費性能等
の向上のためにラジアル構造のものが採用されつつあ
る。しかしながらこのような航空機用タイヤは、高内
圧、高荷重、高速条件下で使用されるため、他の分野の
タイヤに比べ高い耐久性能が要求され、特にビード部
は、離着陸時の大きな負荷による曲げ変形に伴う歪によ
りカーカス端部及びその近傍に剥離損傷が発生しやす
く、従って従来、ビードボリュームの増加、有機、無機
繊維コードからなる補強層を用いる等により、ビード部
の剛性を高め、前記曲げ変形の抑制が計られている。
2. Description of the Related Art In recent years,
Even in tires used under high load and high speed conditions, for example, aircraft tires, radial structure tires are being adopted in order to improve structural durability, running performance, fuel efficiency, and the like. However, since such aircraft tires are used under conditions of high internal pressure, high load, and high speed, they are required to have higher durability performance than tires in other fields, and in particular, the bead part is bent by a large load during takeoff and landing. Peeling damage is likely to occur at the carcass edge and its vicinity due to the strain caused by deformation, and therefore, conventionally, by increasing the bead volume, using a reinforcing layer composed of organic and inorganic fiber cords, the rigidity of the bead portion is increased, and the bending Deformation is controlled.

【0003】しかしながら、このような剛性強化策で
は、曲げ変形に伴う内部発熱を低減しえず、満足のいく
ビード部損傷の防止効果を得るに至っていない。
However, such a rigidity strengthening measure cannot reduce internal heat generation due to bending deformation, and has not achieved a satisfactory effect of preventing damage to the bead portion.

【0004】従って、本発明者らは、ビード部の曲げ変
形について米国航空局規格TSO−C62cに基づく離
陸タクシーシュミレーションテスト等を用いて種々の研
究を積み重ねた。その結果、正規リムRに装着されかつ
正規内圧を充填した図3に示す無負荷時のタイヤビード
部AOと、正規荷重での負荷時のタイヤビード部A1と
を比較した場合、ビード部の内部発熱は、図4に示すよ
うに、例えばリムフランジRaの外側縁から立上げた垂
線上における、各ビード部AO、A1外面とリムフラン
ジRa上縁との間の各長さ、即ち初期高さh0、負荷高
さh1の差であるビード変形量h0−h1が小さいほど
低いことを見出し得た。
Therefore, the present inventors have accumulated various studies on the bending deformation of the bead portion by using a take-off taxi simulation test based on the United States Civil Aviation Bureau standard TSO-C62c. As a result, when comparing the no-load tire bead portion AO shown in FIG. 3 mounted on the regular rim R and filled with the regular internal pressure with the tire bead portion A1 under the regular load, the inside of the bead portion is compared. As shown in FIG. 4, the heat generation is, for example, each length between the outer surface of each bead portion AO, A1 and the upper edge of the rim flange Ra, that is, the initial height on a perpendicular line rising from the outer edge of the rim flange Ra. It was found that the smaller the bead deformation amount h0-h1 which is the difference between h0 and the load height h1, the lower the bead deformation amount h0-h1.

【0005】又本発明者らはさらなる研究の積重ねの結
果、比較的高いモジュラスのゴムをビードエーペックス
に配置することにより初期高さh0を殆ど変化すること
なく、負荷高さh1を大とし、ビード変形量h0ーh1
を減じうること、及び内側から外側に向かってモジュラ
スを多段階に減じることによって、負荷時にビード部に
生じる剪断応力を緩和しビード耐久性を向上しうること
に気付いた。
Further, as a result of the accumulation of further studies, the present inventors have increased the load height h1 by placing a rubber having a relatively high modulus in the bead apex with almost no change in the initial height h0. Deformation amount h0-h1
It was found that the shear stress generated in the bead portion under load can be relieved and the bead durability can be improved by reducing the modulus from the inside to the outside in multiple steps.

【0006】従って本発明者らは、特願平1−3446
38号において、ビード部に、カーカスの外側面に沿っ
てのびる小厚さのサイドパッキングゴムを設け、ビード
エーペックスの100%モジュラスMAを78〜120
kg/cm2 、サイドパッキングゴムの100モジュラスM
Pを53〜95kg/cm2 、及びサイドパッキングゴムを
覆いかつビード部からサイドウォール部にのびる外側ゴ
ムの100%モジュラスMSを14〜50kg/cm2 とす
るとともに各100%モジュラスをMS<MP<MAと
することを提案した。
Therefore, the inventors of the present invention have filed Japanese Patent Application No. 1-3446.
No. 38, a bead portion is provided with a small thickness of side packing rubber that extends along the outer surface of the carcass, and the bead apex has a 100% modulus MA of 78 to 120.
kg / cm 2 , 100 modulus M of side packing rubber
P is 53 to 95 kg / cm 2 , and 100% modulus MS of the outer rubber that covers the side packing rubber and extends from the bead portion to the sidewall portion is 14 to 50 kg / cm 2, and each 100% modulus is MS <MP < Proposed to be MA.

【0007】しかしながらこのものでは、前記外側ゴム
がその全長に亘り単一かつ軟質のゴム材で形成されてい
るため、ビード変形の際リムフランジRaとの間にチェ
ーフィング等の外傷を招きやすく、しかも該外傷からク
ラック等が早期に進行しビード耐久性を損ねることが判
明した。
However, in this case, since the outer rubber is formed of a single and soft rubber material over the entire length thereof, it is easy to cause external damage such as chafing between the outer rubber and the rim flange Ra at the time of bead deformation. Moreover, it has been found that cracks and the like progress early from the external damage and impair the bead durability.

【0008】従って本発明は、前記外側ゴムを夫々所定
のモジュラスを有するチェーファゴムとサイドウォール
ゴムとに分割することを基本として、ビード部曲げ変形
とビード発熱とを低減しつつリムずれ等に起因するチェ
ーフィング等の外傷を抑制できビード耐久性を向上しう
る高速重荷重用タイヤの提供を目的としている。
Therefore, the present invention is based on the fact that the outer rubber is divided into a chafer rubber and a sidewall rubber each having a predetermined modulus, and is caused by a rim shift while reducing bead bending deformation and bead heat generation. An object of the present invention is to provide a high-speed heavy-duty tire capable of suppressing external damage such as chafing and improving bead durability.

【0009】[0009]

【課題を解決するための手段】前記目的を達成するため
に、本発明の高速重荷重用タイヤは、トレッド部からサ
イドウォール部をへてビード部のビードコアに至る本体
部と該ビードコアの廻りで折返される折返し部とを有す
るラジアル構造のカーカス、該カーカスのタイヤ半径方
向上側かつトレッド部内方に配されるベルト層、ビード
コアの上方かつカーカスの前記本体部と折返し部の間で
半径方向上向きにのびる先細状のビードエーペックスゴ
ム、少なくとも前記ビード部においてカーカスのタイヤ
軸方向外側面に沿って配される小厚さのサイドパッキン
グゴム、及びビード部の底面からサイドウォール部に至
るタイヤの外側面を形成する外側ゴムを具えるととも
に、該外側ゴムは、前記ビード部の底面から前記サイド
パッキングゴムを覆いしかもタイヤが正規リムに装着さ
れかつ正規内圧を充填するとともに正規荷重の200%
荷重を負荷した200%荷重状態において前記正規リム
のフランジ部と接触する接触領域を含んでタイヤ半径方
向上方にのびるチェーファゴムと、該チェーファゴムか
らタイヤ半径方向上方にのびるサイドウォールゴムとを
具えるとともに、前記サイドパッキングゴムの100%
伸長時のモジュラスMPを53〜95kg/cm2 、前記ビ
ードエーペックスゴムの100%伸長時のモジュラスM
Aを78〜120kg/cm2 、前記チェーファゴムの10
0%伸長時のモジュラスMCを40〜70kg/cm2 かつ
前記サイドウォールゴムの100%伸長時のモジュラス
MSを10〜45kg/cm2 、しかも前記各モジュラスM
P、MA、MC、MSをMS<MC<MP<MAとして
いる。
In order to achieve the above object, a high-speed heavy-duty tire of the present invention has a body portion extending from a tread portion to a sidewall portion to a bead core of a bead portion, and folded around the bead core. A carcass having a radial structure having a folded portion, a belt layer disposed on the tire radial upper side of the carcass and inward of the tread portion, and extending upward in the radial direction above the bead core and between the main body portion and the folded portion of the carcass. A tapered bead apex rubber, at least a small thickness side packing rubber arranged along the tire axial outer surface of the carcass in the bead portion, and an outer surface of the tire extending from the bottom surface of the bead portion to the sidewall portion And an outer rubber that covers the side packing rubber from the bottom surface of the bead portion. Moreover 200% of the normal load with tire filling mounted in a normal rim and standard pressure
In addition to a chafer rubber that extends upward in the tire radial direction including a contact area that comes into contact with the flange portion of the regular rim in a loaded 200% load state, and a sidewall rubber that extends upward from the chafer rubber in the radial direction of the tire, 100% of the side packing rubber
The modulus MP at extension is 53 to 95 kg / cm 2 , and the modulus M at 100% extension of the bead apex rubber.
A of 78 to 120 kg / cm 2 , 10 of the chafer rubber
0% elongation at a modulus MC 40~70kg / cm 2 and the side wall of the modulus MS at 100% elongation of the rubber 10~45kg / cm 2, yet each modulus M
P, MA, MC, and MS are set as MS <MC <MP <MA.

【0010】[0010]

【作用】ビードエーペックスゴムとして、100%伸長
時のモジュラス、すなわち100%モジュラスが、78
〜120kg/cm2 の高硬度ゴムを用いている。これによ
りビード剛性を高め、ビード変形量h0ーh1を減じ
る。さらにタイヤ外側面を形成する外側ゴムのうちフラ
ンジとの接触領域を含んでビード部の底面からのびるチ
ェーファゴムに比較的軟質の100%モジュラスが40
〜70kg/cm2 のものを用いるとともに、その間に10
0%モジュラスが53〜95kg/cm2 であって、しかも
ビードエーペックスゴムよりも小かつチェーファゴムよ
りも大のサイドパッキングゴムを介在させる。このこと
により、ビード剛性をさらに高めると同時にビード変形
の際の剪断応力を緩和しビード耐久性を高める。しかも
チェーファゴムは100%モジュラスを少なくとも40
kg/cm2 以上としたため、リムづれ等の外傷発生を抑制
しうる。このように、ビード変形量の減少による曲げ応
力及び変形発熱の低減効果、剪断応力の緩和効果並びに
外傷抑止効果の相乗作用によって、ビード損傷を抑制し
うる。
The bead apex rubber has a modulus at 100% elongation, that is, a 100% modulus of 78.
A high hardness rubber of 120 kg / cm 2 is used. This increases the bead rigidity and reduces the bead deformation amount h0-h1. Further, of the outer rubber forming the tire outer surface, the chafer rubber extending from the bottom surface of the bead portion including the contact area with the flange has a relatively soft 100% modulus of 40.
Use ~ 70 kg / cm 2 and 10
A side packing rubber having a 0% modulus of 53 to 95 kg / cm 2 and smaller than the bead apex rubber and larger than the chafer rubber is interposed. As a result, the bead rigidity is further increased, and at the same time, the shear stress at the time of bead deformation is relaxed and the bead durability is increased. Moreover, chafer rubber has a 100% modulus of at least 40.
Since it is kg / cm 2 or more, the occurrence of external damage such as rim slippage can be suppressed. As described above, the bead damage can be suppressed by the synergistic effects of the bending stress and the deformation heat generation reducing effect due to the reduction of the bead deformation amount, the shear stress relaxing effect, and the external damage suppressing effect.

【0011】又外側ゴムのうち前記チェーファゴムから
上方にのびるサイドウォールゴムの100%モジュラス
を10〜45kg/cm2 としたため、タイヤ変形の際最も
変形量が大なサイドウォール部において外側ゴムがカー
カスに追従して伸縮でき、そのセパレーションを防止し
うるとともに応力のビード部への伝播を防止できる。し
かもこのような外側ゴムの分割により、チェーファゴム
及びサイドウォールゴムの双方に夫々物性の異なる異種
のゴム組成物を採用することが可能となり、設計の自由
度の拡大及び総合的なタイヤ耐久性の向上を計りうる。
Since the sidewall rubber extending upward from the chafer rubber has a 100% modulus of 10 to 45 kg / cm 2 of the outer rubber, the outer rubber forms a carcass in the sidewall portion which is most deformed when the tire is deformed. It is possible to follow and expand and contract, prevent its separation, and prevent stress from propagating to the bead portion. Moreover, by dividing the outer rubber in this way, it is possible to adopt different rubber compositions having different physical properties for both the chafer rubber and the sidewall rubber, thereby expanding the freedom of design and improving the overall tire durability. Can be measured.

【0012】[0012]

【実施例】以下本発明の一実施例をタイヤサイズ46×
17R20の航空機用タイヤの場合を例にとり、図面に
基づき説明する。
EXAMPLE An example of the present invention will be described below with a tire size of 46 ×
An example of a 17R20 aircraft tire will be described with reference to the drawings.

【0013】正規リムRに装着されかつ正規内圧を付加
した正規内圧状態におけるタイヤ断面を示す図1におい
て、高速重荷重用タイヤ1(以下タイヤ1という)は、
ビードコア2が通るビード部3と、該ビード部3に連な
りかつタイヤ半径方向上向きにのびるサイドウォール部
4と、その上端間を継ぐトレッド部5とを具えている。
In FIG. 1 showing a tire cross section in a normal internal pressure state in which a normal internal pressure is applied to the normal rim R, a high speed heavy load tire 1 (hereinafter referred to as tire 1) is
It is provided with a bead portion 3 through which the bead core 2 passes, a sidewall portion 4 which is continuous with the bead portion 3 and extends upward in the tire radial direction, and a tread portion 5 which joins between the upper ends thereof.

【0014】さらにタイヤ1には、ビードコア2を、タ
イヤの内側から外側に折返す複数枚、例えば4枚のイン
ナープライからなる内層7Aと、この内層7Aの折返し
部を囲みタイヤの外側から内側に巻下す複数枚、例えば
2枚のアウタープライからなる外層7Bとを有するカー
カス7が設けられる。
Further, in the tire 1, the bead core 2 is folded from the inner side of the tire to the outer side, and the inner layer 7A is composed of a plurality of inner plies, for example, four inner plies. A carcass 7 having a plurality of, for example, two outer layers 7B made of outer plies to be wound is provided.

【0015】前記内層7Aは、サイドウォール部4、ト
レッド5部を通るトロイド状の本体部70両端に、ビー
ドコア2をタイヤ内側から外側に折返す折返し部71を
有し、又外層7Bはトロイド状の本体部73にビードコ
ア2の外から内に巻下ろした巻下ろし部74を具える。
The inner layer 7A has folded portions 71 at which the bead core 2 is folded from the tire inner side to the outer side at both ends of the toroidal main body portion 70 passing through the side wall portion 4 and the tread 5 portion, and the outer layer 7B has a toroidal shape. The main body 73 is provided with an unwinding part 74 that is unwound from the outside to the inside of the bead core 2.

【0016】インナープライ及びアウタープライは本例
では有機繊維コードからなるカーカスコードを用いてお
り、該カーカスコードはタイヤ赤道に対して70度〜9
0度の傾きを有するラジアル方向に配置されるととも
に、本例ではカーカス7は、隣り合うカーカスプライ間
において、夫々カーカスコードが円周方向に対して交互
に交叉して傾いている。なお有機繊維コードとして、レ
ーヨン、ポリエステル、ビニロン、ナイロン、芳香族ポ
リアミド等を用いうる。
In this embodiment, the inner ply and the outer ply are carcass cords made of organic fiber cords, and the carcass cords are 70 ° to 9 ° with respect to the tire equator.
The carcass 7 is arranged in the radial direction having an inclination of 0 degree, and in the present example, the carcass cords in the adjacent carcass plies are alternately inclined with respect to the circumferential direction. As the organic fiber cord, rayon, polyester, vinylon, nylon, aromatic polyamide or the like can be used.

【0017】又前記カーカス7の内層7Aの本体部70
と折返し部71との間にはビードコア2から半径方向上
向きにのびる先細状のビードエーペックスゴム9が配さ
れる。又ビード部3には、カーカス7の外層7Bの本体
部73に、その外側面に沿って半径方向上下にのびる小
厚さのサイドパッキングゴム15が側設される。
The body portion 70 of the inner layer 7A of the carcass 7
A tapered bead apex rubber 9 extending radially upward from the bead core 2 is disposed between the and the folded portion 71. Further, in the bead portion 3, a side packing rubber 15 having a small thickness extending vertically in the radial direction along the outer surface of the main body portion 73 of the outer layer 7B of the carcass 7 is provided.

【0018】サイドパッキングゴム15は、図2に示す
ように、本例では最大厚さtを有する中央部分15Aの
上下に、その厚さを漸減させた先細状の上、下部分15
B、15Cを延設した略三日月状をなす。
As shown in FIG. 2, the side packing rubber 15 has tapering upper and lower portions 15 having a thickness gradually reduced above and below a central portion 15A having a maximum thickness t in this embodiment.
The crescent shape is formed by extending B and 15C.

【0019】なお前記最大厚さtは、2.5mm以上かつ
4.5mm以下、もしくはビードコア直径の0.1倍以上
かつ0.18倍以下とすることが好ましい。又サイドパ
ッキングゴム15は、タイヤ外側面のうち、タイヤ軸方
向外方に向かって凹状に湾曲するビード外側面と、凸状
に湾曲するサイドウォール外側面との間の偏曲点位置P
近傍に、前記中央部分15Aを位置して配されるととも
に、下方部15B下端15aは、前記ビードコア2の上
縁高さ位置を下方にこえて途切れる。又該下端15aに
は、外層7Bの前記巻下ろし部74下面に沿う補強フィ
ラ16が連設される。そしてサイドパッキングゴム15
は、ビード部3の底面からサイドウオール部4に亘って
タイヤの外側面をなす外側ゴム17により覆われる。
It is preferable that the maximum thickness t is 2.5 mm or more and 4.5 mm or less, or 0.1 times or more and 0.18 times or less of the bead core diameter. The side packing rubber 15 is located at an inflection point position P between the bead outer surface that is concavely curved outward in the tire axial direction and the sidewall outer surface that is convexly curved, of the tire outer surface.
The central portion 15A is disposed in the vicinity, and the lower end 15a of the lower portion 15B is interrupted below the upper edge height position of the bead core 2. Further, the lower end 15a is continuously provided with a reinforcing filler 16 along the lower surface of the unwinding portion 74 of the outer layer 7B. And side packing rubber 15
Is covered with the outer rubber 17 that forms the outer surface of the tire from the bottom surface of the bead portion 3 to the side wall portion 4.

【0020】なおトレッド部5には、その内部にカーカ
ス7の半径方向上側に位置してベルト層10が設けら
れ、又本例では、前記ベルト層10と前記カーカス7と
の間には、カットブレーカ14が介在している。
A belt layer 10 is provided inside the tread portion 5 in the radial direction above the carcass 7. In this example, a cut layer is provided between the belt layer 10 and the carcass 7. The breaker 14 is interposed.

【0021】前記ベルト層10は、複数枚、例えば8枚
のベルトプライからなる。前記カットブレーカ14は、
例えば2層のカットブレーカプライを用いる一方、この
カットブレーカ14は、タイヤ赤道を挟んだ該トレッド
面の中央部では、カーカス7に沿うとともに、その外方
で該カーカス7から徐々に離間してその外端は、タイヤ
全巾Wの65〜85%程度の位置、好ましくは70〜7
8%程度の範囲の位置で終端する。
The belt layer 10 comprises a plurality of, for example, eight belt plies. The cut breaker 14 is
For example, while using a two-layer cut breaker ply, the cut breaker 14 is along the carcass 7 at the center of the tread surface sandwiching the tire equator and gradually separated from the carcass 7 on the outside thereof. The outer end is located at a position of about 65 to 85% of the total width W of the tire, preferably 70 to 7
It ends at a position of about 8%.

【0022】さらにベルト層10は、カットブレーカ1
4に接しかつその外端は、カットブレーカ14の外端を
外方に越えて延在するとともにタイヤ外表面に沿う斜面
で整一する。又ベルト巾は、タイヤ全巾Wの70〜85
%程度の範囲であって、ベルト外端からタイヤ外表面ま
での最短距離L1が3〜15mm程度の範囲となるように
設定される。
Further, the belt layer 10 is a cut breaker 1
4 and its outer end extends outwardly beyond the outer end of the cut breaker 14 and is aligned with a slope along the outer surface of the tire. The belt width is 70 to 85 of the total tire width W.
%, And the shortest distance L1 from the outer end of the belt to the outer surface of the tire is set to be in the range of about 3 to 15 mm.

【0023】ベルトプライを形成するベルトコードは、
低伸長性の弾性コードを用い、かつベルトコードはタイ
ヤ赤道に対して0〜20度の角度で傾けて並置してい
る。
The belt cord forming the belt ply is
Low-stretch elastic cords are used, and the belt cords are juxtaposed at an angle of 0 to 20 degrees with respect to the tire equator.

【0024】なおベルト層10の外面には、耐カット性
を高める保護層18を設けている。
A protective layer 18 is provided on the outer surface of the belt layer 10 to enhance cut resistance.

【0025】そして本発明においては、前記外側ゴム1
7を、前記ビード部3の底面からサイドウォールゴム1
5を覆いしかも前記正規内圧状態かつ正規荷重の200
%の荷重を負荷した200%荷重状態において前記正規
リムRのフランジRaと接触する接触領域Yを含んでタ
イヤ半径方向上方にのびるチェーファゴム20と、その
上方のサイドウォールゴム21とに分割している。しか
も前記サイドパッキングゴム15の100%モジュラス
MPを53〜95kg/cm2 、前記ビードエーペックスゴ
ム9の100%モジュラスMAを78〜120kg/c
m2 、前記チェーファゴム20の100%モジュラスM
Cを40〜70kg/cm2 かつ前記サイドウォールゴム2
1の100%モジュラスMSを10〜45kg/cm2 とす
る一方、各モジュラスMP、MA、MC、MSをMS<
MC<MP<MAとしている。
In the present invention, the outer rubber 1
7 from the bottom surface of the bead portion 3 to the sidewall rubber 1
5 and 200 of the normal internal pressure state and the normal load.
%, A chafer rubber 20 that extends upward in the tire radial direction including a contact area Y that contacts the flange Ra of the regular rim R in a 200% load state and a sidewall rubber 21 above the chafer rubber 20. .. Moreover, the 100% modulus MP of the side packing rubber 15 is 53 to 95 kg / cm 2 , and the 100% modulus MA of the bead apex rubber 9 is 78 to 120 kg / c.
m 2 , 100% modulus M of the chafer rubber 20
C is 40 to 70 kg / cm 2 and the side wall rubber 2
100% modulus MS of 1 is 10 to 45 kg / cm 2 , while each modulus MP, MA, MC, MS is MS <
MC <MP <MA.

【0026】又ビードエーペックスゴム9、サイドパッ
キングゴム15、チェーファゴム20、サイドウオール
ゴム 21の前記100%モジュラスを、破断時の伸び
(%)、破断時の応力(kg/cm2 )とともに、カーカス
7のトッピングゴムの各数値とともにまとめて表1に示
す。
Also, bead apex rubber 9, side pad
King rubber 15, chafer rubber 20, side wall
Rubber The 100% modulus of 21, the elongation at break
(%), Stress at break (kg / cm2), carcass
Shown in Table 1 together with the numerical values of the 7 topping rubbers.
You

【0027】[0027]

【表1】 [Table 1]

【0028】このよう にビードエーペックスゴム9とし
て、100%モジュラスが78〜120kg/cm2 の高硬
度ゴムを用いている。これによりビード部の剛性を高
め、ビード変形量h0ーh1を減 じる。さらにチェーフ
ァゴム20として100%モジュラスが40〜70kg/
cm2の比較的 軟質のものを用いるとともに、その間に1
00%モジュラスが53〜95kg/cm2 であって、しか
もビードエーペックスゴム9よりも小かつチェーファー
ゴム20よりも大のサイドパッキングゴム15を介在さ
せる。これにより、剛性を高めると同時に剛性段差を減
じ、剪断応力を緩和しビード部耐久性を高め る。しかも
チェーファーゴム20は少なくとも100%モジュラス
を40kg/cm2 以上としているため、タイヤ変形の際の
リムずれ等の外部損傷を抑止しうる。このように、ビー
ド変形量の減少による曲げ応力及び変形発熱の低減効
果、剪断応力の緩和効果、並びに外部損傷抑止効果の相
乗作用によって、ビード損傷を大巾に抑制しうる。
Like this Bead apex rubber 9
High hardness with 100% modulus of 78-120 kg / cm2
The rubber is used. This increases the rigidity of the bead section.
Therefore, the bead deformation amount h0-h1 is reduced. Jijiru More chefs
100% modulus as rubber 20 is 40 to 70 kg /
cm2 relatively Use a soft one and 1
00% modulus is 53 ~ 95kg / cm2,
Is smaller than bead apex rubber 9 and chafer
Insert a side packing rubber 15 that is larger than the rubber 20.
Let This increases rigidity and reduces rigidity steps
And shear stress are alleviated to improve the durability of the bead It Moreover,
Chafer rubber 20 has at least 100% modulus
Since it is 40 kg / cm2 or more, it is
External damage such as rim displacement can be suppressed. Like this, bee
Effect of reducing bending stress and deformation heat by reducing the amount of deformation
Phase of effect of relaxation of shear stress and effect of suppressing external damage
By the riding action, bead damage can be greatly suppressed.

【0029】さらに、前記サイドパッキングゴム15
は、その上端15bのビード底面3Aからの半径方向の
高さHPが前記ビードエーペックスゴム9の上端9aの
ビード底面3Aからの高さHAよりも大かつタイヤ断面
高さHの1/2 よりも小とするとともに、前記ビードエー
ペックスゴム9の上端9aの前記高さHAはリムフラン
ジ高さHRよりも大としたことを特徴としている。
Further, the side packing rubber 15
The height HP of the upper end 15b of the bead apex rubber 9 in the radial direction from the bead bottom surface 3A is larger than the height HA of the upper end 9a of the bead apex rubber 9 from the bead bottom surface 3A and is less than 1/2 of the tire section height H. The height HA of the upper end 9a of the bead apex rubber 9 is larger than the rim flange height HR.

【0030】なおビード底面3Aからの高さは、該底面
3Aが本例のごとく傾斜する場合にはその上縁からの高
さとして定義する。
The height from the bottom surface 3A of the bead is defined as the height from the upper edge of the bottom surface 3A when the bottom surface 3A is inclined as in this example.

【0031】これは、ビード部の曲げ剛さを大とするに
は、ビードエーペックスゴム9の上端9aの高さHAは
リムフランジRaの高さHRよりも大であることが必要
であり、又この高さHRよりもサイドパッキングゴム1
5の上端15bの高さHPを大とすることによって、ビ
ード折曲がり部の剛性を効果的に高めうる。又この高さ
HPを、タイヤ断面高さHの1/2 よりりも大とすること
は不要である。
This is because in order to increase the bending rigidity of the bead portion, the height HA of the upper end 9a of the bead apex rubber 9 needs to be larger than the height HR of the rim flange Ra, and Side packing rubber 1 than this height HR
By making the height HP of the upper end 15b of 5 large, the rigidity of the bead bending portion can be effectively increased. Further, it is not necessary to make the height HP larger than 1/2 of the tire sectional height H.

【0032】又チェーファゴム20は、前記サイドパッ
キングゴム15を完全に覆うことが必要であり、従って
ビード底面3Aからの上端の高さHCは前記サイドパッ
キングゴム15の高さHPより大である。しかしながら
該高さHCを過度に高めた場合には、サイドウォール部
4におけるタイヤ変形に対する追従性が低下し、従って
高さHCの、高さHPに対する差HC−HPは前記チェ
ーファゴム20の厚さの0.5倍以上かつ2.5倍以下
とすることがことが好ましい。
Further, the chafer rubber 20 is required to completely cover the side packing rubber 15. Therefore, the height HC of the upper end from the bead bottom surface 3A is larger than the height HP of the side packing rubber 15. However, when the height HC is excessively increased, the following capability of the sidewall portion 4 for tire deformation is deteriorated, and therefore the difference HC-HP between the height HC and the height HP is equal to the thickness of the chafer rubber 20. It is preferable to set it to 0.5 times or more and 2.5 times or less.

【0033】又チェーファゴム20とサイドウォールゴ
ム21との間のモジュラス差に起因するセパレーション
等を抑制するために、本例では、チェーファゴム20上
端部をタイヤ軸方向外方かつタイヤ半径方向下方に向か
って傾斜する斜面Sで形成する一方、該斜面S下端のビ
ード底面3Aからの高さHSを前記高さHPより小とし
ている。
Further, in order to suppress the separation and the like due to the modulus difference between the chafer rubber 20 and the sidewall rubber 21, in this example, the upper end of the chafer rubber 20 is directed outward in the tire axial direction and downward in the tire radial direction. While forming the inclined slope S, the height HS from the bead bottom surface 3A at the lower end of the slope S is smaller than the height HP.

【0034】このことによりサイドウォールゴム21と
の接合面積を高めるとともに、剛性をタイヤ軸方向外側
に向かって多段階に漸減している。
As a result, the joint area with the sidewall rubber 21 is increased, and the rigidity is gradually reduced in the tire axially outward direction in multiple steps.

【0035】(具体例)図1に示すタイヤ構造を有しか
つタイヤサイズが46×17R20である航空機用タイ
ヤを表2に示すように、ビードエーペックスゴム、サイ
ドパッキングゴム、チェーファゴム、サイドウォールゴ
ムの100%モジュラスを変えて、比較例とともに試作
するとともに、該試作タイヤを米国航空局規格TSO−
C62cに基づきタクシーシュミレーションの条件(荷
重100%)をくり返しビード耐久性を測定した結果を
実施例を100とする指数により同表に示す。指数が大
であるのが好ましく、実施例品はビード部耐久性に優れ
ているのがわかる。
(Specific Example) As shown in Table 2, an aircraft tire having the tire structure shown in FIG. 1 and a tire size of 46 × 17R20 is made of bead apex rubber, side packing rubber, chafer rubber, and sidewall rubber. A 100% modulus was changed, and a trial tire was produced along with a comparative example.
The result of repeatedly measuring the bead durability under the condition of taxi simulation (load 100%) based on C62c is shown in the table by an index with Example as 100. It is preferable that the index is large, and it can be seen that the products of Examples have excellent bead portion durability.

【0036】[0036]

【表2】 [Table 2]

【0037】又実施例品は比較例2のタイヤに比して、
前記条件下におけるビード部温度が5℃程度低く又ビー
ド変形量も1〜1.5%程度減じていた。
Further, the example product is
Under the above conditions, the bead temperature was low by about 5 ° C. and the bead deformation amount was reduced by about 1 to 1.5%.

【0038】しかも実施例品のタイヤを走行後、外観目
視検査したところリムチェーフィングやクラック等の外
傷の発生はなかった。
Furthermore, after running the tires of the examples, visual inspections showed no external damage such as rim chafing and cracks.

【0039】[0039]

【発明の効果】叙上のごとく本発明の高速重荷重用タイ
ヤは、タイヤ内部構造を変更することなくかつ走行性能
等を低下させることなくビード変形、ビード発熱、及び
リムチェーフィング等の外部損傷を効果的に抑制できビ
ード耐久性を大巾に向上しうる。
As described above, the high-speed heavy-duty tire of the present invention can prevent bead deformation, bead heat generation, and external damage such as rim chafing without changing the tire internal structure and without lowering running performance. It can be effectively suppressed and the bead durability can be greatly improved.

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

【図1】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図2】ビード部を拡大して示す部分断面図である。FIG. 2 is a partial sectional view showing a bead portion in an enlarged manner.

【図3】ビード部の曲げ変形状態を示す略線図である。FIG. 3 is a schematic diagram showing a bending deformation state of a bead portion.

【図4】ビード外面高さh0、h1とビード部温度との
関係を示す線図である。
FIG. 4 is a diagram showing a relationship between bead outer surface heights h0 and h1 and a bead portion temperature.

【符号の説明】[Explanation of symbols]

2 ビードコア 3 ビード部 3B ビード底面 4 サイドウォール部 5 トレッド部 7 カーカス 9 ビードエーペックスゴム 10 ベルト層 15 サイドパッキングゴム 16 サイドウオールゴム R リム Ra フランジ 2 bead core 3 bead part 3B bead bottom 4 sidewall part 5 tread part 7 carcass 9 bead apex rubber 10 belt layer 15 side packing rubber 16 sidewall rubber R rim Ra flange

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】トレッド部からサイドウォール部をへてビ
ード部のビードコアに至る本体部と該ビードコアの廻り
で折返される折返し部とを有するラジアル構造のカーカ
ス、該カーカスのタイヤ半径方向上側かつトレッド部内
方に配されるベルト層、ビードコアの上方かつカーカス
の前記本体部と折返し部の間で半径方向上向きにのびる
先細状のビードエーペックスゴム、少なくとも前記ビー
ド部においてカーカスのタイヤ軸方向外側面に沿って配
される小厚さのサイドパッキングゴム、及びビード部の
底面からサイドウォール部に至るタイヤの外側面を形成
する外側ゴムを具えるとともに、該外側ゴムは、前記ビ
ード部の底面から前記サイドパッキングゴムを覆いしか
もタイヤが正規リムに装着されかつ正規内圧を充填する
とともに正規荷重の200%荷重を負荷した200%荷
重状態において前記正規リムのフランジ部と接触する接
触領域を含んでタイヤ半径方向上方にのびるチェーファ
ゴムと、該チェーファゴムからタイヤ半径方向上方にの
びるサイドウォールゴムとを具えるとともに、前記サイ
ドパッキングゴムの100%伸長時のモジュラスMPを
53〜95kg/cm2 、前記ビードエーペックスゴムの1
00%伸長時のモジュラスMAを78〜120kg/c
m2 、前記チェーファゴムの100%伸長時のモジュラ
スMCを40〜70kg/cm2 かつ前記サイドウォールゴ
ムの100%伸長時のモジュラスMSを10〜45kg/
cm2 、しかも前記各モジュラスMP、MA、MC、MS
をMS<MC<MP<MAとした高速重荷重用タイヤ。
1. A carcass having a radial structure having a main body portion extending from a tread portion to a bead core of a bead portion through a sidewall portion and a folded portion folded around the bead core, an upper side of the carcass in a radial direction of a tire and a tread. A belt layer disposed inward of the portion, a tapered bead apex rubber extending upward in the radial direction between the main body portion and the folded portion of the carcass above the bead core, at least along the tire axial outer surface of the carcass at the bead portion. The outer rubber forming the outer surface of the tire from the bottom surface of the bead portion to the sidewall portion, and the outer rubber is provided from the bottom surface of the bead portion to the side portion. The tire is mounted on the regular rim and covers the packing rubber, and is filled with the regular internal pressure as well as the regular load. The tire includes a chafer rubber that extends upward in the tire radial direction including a contact region that comes into contact with the flange portion of the regular rim in a 200% load state in which a 200% load is applied, and a sidewall rubber that extends upward from the chafer rubber in the radial direction of the tire. In addition, the modulus MP at 100% elongation of the side packing rubber is 53 to 95 kg / cm 2 , and the modulus of the bead apex rubber is 1
Modulus MA at 00% elongation is 78-120kg / c
m 2 , the modulus MC of the chafer rubber at 100% extension is 40 to 70 kg / cm 2, and the modulus MS of the sidewall rubber at 100% extension is 10 to 45 kg /
cm 2 , and above each modulus MP, MA, MC, MS
High-speed heavy-duty tire with MS <MC <MP <MA.
【請求項2】前記サイドパッキングゴムは、その上端の
ビード底面からの半径方向の高さHPが前記ビードエー
ペックスゴム上端のビード底面からの高さHAよりも大
かつタイヤ断面高さHの1/2 よりも小とするとともに、
前記ビードエーペックスゴム上端の前記高さHAはリム
フランジ高さHRよりも大としたことを特徴とする請求
項1記載の高速重荷重用タイヤ。
2. The side packing rubber has a height HP at the upper end in the radial direction from the bead bottom surface that is larger than the height HA from the bead bottom surface at the upper end of the bead apex rubber and is 1/1 / the tire cross-section height H. Smaller than 2 and
The high-speed heavy-duty tire according to claim 1, wherein the height HA of the upper end of the bead apex rubber is larger than the rim flange height HR.
JP34030491A 1990-12-10 1991-11-28 High speed and heavy load tire Pending JPH0592709A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2-410004 1990-12-10
JP41000490 1990-12-10

Publications (1)

Publication Number Publication Date
JPH0592709A true JPH0592709A (en) 1993-04-16

Family

ID=18519242

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34030491A Pending JPH0592709A (en) 1990-12-10 1991-11-28 High speed and heavy load tire

Country Status (2)

Country Link
JP (1) JPH0592709A (en)
FR (1) FR2670160B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476129A (en) * 1993-12-21 1995-12-19 Bridgestone Corporation Radial tire for aircraft with specified bead portions
JP2003080908A (en) * 2001-08-31 2003-03-19 Goodyear Tire & Rubber Co:The Aircraft tire with improved bead structure
JP2006062544A (en) * 2004-08-27 2006-03-09 Bridgestone Corp Radial tire containing air for aircraft
JP2013001283A (en) * 2011-06-17 2013-01-07 Bridgestone Corp Tire
JPWO2012018106A1 (en) * 2010-08-06 2013-10-03 株式会社ブリヂストン tire
JP2014118012A (en) * 2012-12-14 2014-06-30 Yokohama Rubber Co Ltd:The Pneumatic tire

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2181997T3 (en) * 1996-07-08 2003-03-01 Bridgestone Corp ROBUST RADIAL TIRES COVERS.
ITMI20110974A1 (en) 2011-05-30 2012-12-01 Pirelli HIGH-PERFORMANCE TIRE FOR VEHICLE WHEELS
EP2914450B1 (en) 2012-10-31 2017-07-26 Pirelli Tyre S.p.A. Tire for vehicle wheels

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583606A (en) * 1978-12-16 1980-06-24 Yokohama Rubber Co Ltd:The Radial tyre for automobile and its production
JPS589005A (en) * 1981-02-12 1983-01-19 ハネウエル・インコ−ポレ−テツド Electromagnetic device utilizing electromagnetic field vector for determining direction of helmet
JPS6047703A (en) * 1983-08-25 1985-03-15 Sumitomo Rubber Ind Ltd Radial tire excellent in drive comfortableness
JPS624604A (en) * 1985-06-28 1987-01-10 Yokohama Rubber Co Ltd:The Pneumatic tire

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1558385A (en) * 1967-11-27 1969-02-28
LU86479A1 (en) * 1986-06-20 1986-12-02 Goodyear Tire & Rubber PNEUMATIC BANDAGES
JP2538622B2 (en) * 1987-11-06 1996-09-25 株式会社ブリヂストン Pneumatic radial tires for heavy loads
JP2579329B2 (en) * 1987-12-09 1997-02-05 住友ゴム工業 株式会社 Pneumatic tire
JP2814101B2 (en) * 1989-04-26 1998-10-22 横浜ゴム株式会社 Pneumatic radial tire
JP2793672B2 (en) * 1989-12-28 1998-09-03 住友ゴム工業株式会社 High speed heavy duty tire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583606A (en) * 1978-12-16 1980-06-24 Yokohama Rubber Co Ltd:The Radial tyre for automobile and its production
JPS589005A (en) * 1981-02-12 1983-01-19 ハネウエル・インコ−ポレ−テツド Electromagnetic device utilizing electromagnetic field vector for determining direction of helmet
JPS6047703A (en) * 1983-08-25 1985-03-15 Sumitomo Rubber Ind Ltd Radial tire excellent in drive comfortableness
JPS624604A (en) * 1985-06-28 1987-01-10 Yokohama Rubber Co Ltd:The Pneumatic tire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476129A (en) * 1993-12-21 1995-12-19 Bridgestone Corporation Radial tire for aircraft with specified bead portions
JP2003080908A (en) * 2001-08-31 2003-03-19 Goodyear Tire & Rubber Co:The Aircraft tire with improved bead structure
JP2006062544A (en) * 2004-08-27 2006-03-09 Bridgestone Corp Radial tire containing air for aircraft
JPWO2012018106A1 (en) * 2010-08-06 2013-10-03 株式会社ブリヂストン tire
JP5944826B2 (en) * 2010-08-06 2016-07-05 株式会社ブリヂストン tire
JP2013001283A (en) * 2011-06-17 2013-01-07 Bridgestone Corp Tire
JP2014118012A (en) * 2012-12-14 2014-06-30 Yokohama Rubber Co Ltd:The Pneumatic tire

Also Published As

Publication number Publication date
FR2670160B1 (en) 1997-09-05
FR2670160A1 (en) 1992-06-12

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