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JPH05286309A - Pneumatic radial tire - Google Patents

Pneumatic radial tire

Info

Publication number
JPH05286309A
JPH05286309A JP4084151A JP8415192A JPH05286309A JP H05286309 A JPH05286309 A JP H05286309A JP 4084151 A JP4084151 A JP 4084151A JP 8415192 A JP8415192 A JP 8415192A JP H05286309 A JPH05286309 A JP H05286309A
Authority
JP
Japan
Prior art keywords
belt layer
tire
belt
layer
pneumatic radial
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
JP4084151A
Other languages
Japanese (ja)
Inventor
Katsutoshi Tani
勝利 谷
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 JP4084151A priority Critical patent/JPH05286309A/en
Publication of JPH05286309A publication Critical patent/JPH05286309A/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
    • B60C9/00Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B60C9/22Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre

Landscapes

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

Abstract

PURPOSE:To provide a light weight tire by maintaining sufficiently high operation stability and the anti-wear quality of the tread portion of the tire. CONSTITUTION:This is a pneumatic radial tire that is equipped with a radial carcass 11, a belt layer 12 of substantially one layer consisting of a steel cords that extend in inclination at a comparatively small angle in regard to a tire peripheral direction, and a belt auxiliary layer 13 that sustantially consists of heat contractile organic fibre cords extending in the tire peripheral direction and covers the whole width of the belt layer 12 on the outer periphery side of the belt layer 12. The inclination direction of the belt layer 12 cords in regard to the tire peripheral direction is made to differentiate mutually at respective half portions in the width direction of the belt layer 12.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は、空気入りラジアルタ
イヤに関するものであり、とくには、ベルト補強構造に
改良を加えることによってタイヤの軽量化をもたらすも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic radial tire and, more particularly, to a lightweight tire by improving the belt reinforcing structure.

【0002】[0002]

【従来の技術】従来の空気入りラジアルタイヤとして
は、図3に例示するように、タイヤ周方向に対して実質
的に90°の角度でのびるコードの一層または二層からな
るラジアルカーカス1と、このラジアルカーカス1の外
周側で実質上トレッド幅いっぱいに配設した内外二層の
ベルト層2a, 2bと、実質的にタイヤ周方向に延びる熱収
縮性有機繊維コードよりなり、ベルト層2a, 2bの外周側
で、ベルト層2a, 2bをそれらの全幅にわたって覆うベル
ト補助層3 とを具え、ここで、内外二層のベルト層2a,
2bを、タイヤ周方向に対して比較的小さな角度で傾斜し
て延びて相互に交差するそれぞれのスチールコードによ
って構成したものがある。
2. Description of the Related Art As a conventional pneumatic radial tire, as shown in FIG. 3, a radial carcass 1 composed of one or two layers of cords extending at an angle of substantially 90 ° with respect to the tire circumferential direction, The belt layers 2a, 2b are composed of inner and outer two belt layers 2a, 2b arranged substantially on the outer peripheral side of the radial carcass 1 to fill the tread width and heat-shrinkable organic fiber cords extending substantially in the tire circumferential direction. A belt auxiliary layer (3) covering the belt layers (2a, 2b) over their entire width on the outer peripheral side of the belt layers (2a, 2b).
There is a structure in which 2b is formed of steel cords that extend at a relatively small angle with respect to the tire circumferential direction and extend and intersect with each other.

【0003】ところが、近年においては、環境問題等か
ら、タイヤの転がり抵抗を低減した低燃費タイヤの開発
が強く要求されるに至っており、これがため、トレッド
ゴム厚み、サイドウォール厚みなどの各構成部材の厚み
を薄くしてタイヤ全体の軽量化を図ることが種々検討さ
れている。
However, in recent years, due to environmental problems and the like, there has been a strong demand for the development of a fuel-efficient tire having a reduced rolling resistance of the tire. For this reason, each constituent member such as the tread rubber thickness and the sidewall thickness is required. Various studies have been made to reduce the thickness of the tire to reduce the weight of the entire tire.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、タイヤ
の各構成部材の厚みを薄くすることには自ら限界があ
り、それのみにては、タイヤ重量を所期したほどには低
減させることができない。
However, there is a limit to reducing the thickness of each component of the tire, and the weight of the tire cannot be reduced to the intended level only by that.

【0005】そこで、タイヤの補強部材としてのベルト
層を、スチールコードより軽量の有機繊維コード、たと
えばアラミドコードにより構成することが提案されてい
るが、これによれば、トレッドクラウン部の、トレッド
周方向および幅方向の外力に対する剛性が小さくなっ
て、耐摩耗性、操縦安定性、低騒音性などの低下が余儀
なくされ、満足し得るタイヤ性能をもたらすことができ
ない。
Therefore, it has been proposed that the belt layer as a reinforcing member of the tire be composed of an organic fiber cord lighter than a steel cord, for example, an aramid cord. According to this, the tread circumference of the tread crown portion is proposed. The rigidity against the external force in the direction of the width and the rigidity against the external force becomes small, and the wear resistance, the steering stability, the low noise, etc. are inevitably lowered, and the satisfactory tire performance cannot be provided.

【0006】また、この一方において、図4に示すよう
に、スチールコードよりなるベルト層を一層だけ配設す
ることも提案されているが、このことによれば、スチー
ルコードがタイヤ周方向に対して一定方向へ傾斜して延
びていることから、補強構造がタイヤ赤道面に対して、
非対称となり、タイヤへの内圧の充填に際して形状の保
持が不可能となる問題がある。
On the other hand, as shown in FIG. 4, it has been proposed to dispose only one belt layer made of steel cord. According to this, the steel cord is arranged in the tire circumferential direction. Since it extends with a certain inclination in a certain direction, the reinforcing structure with respect to the tire equatorial plane,
There is a problem that the shape becomes asymmetric and the shape cannot be maintained when the tire is filled with the internal pressure.

【0007】この発明は、これらの問題を解決すること
を課題として検討した結果なされたものであり、この発
明の目的は、とくに、ベルト構造に改良を加えることに
よって、タイヤの形状保持を可能ならしめることはもち
ろん、耐摩耗性、操縦安定性および低騒音性を十分高く
維持してなお、タイヤ重量を効果的に低減できる空気入
りラジアルタイヤを提供するにある。
The present invention has been made as a result of studies aimed at solving these problems, and an object of the present invention is to maintain the shape of a tire by improving the belt structure. It is, of course, to provide a pneumatic radial tire capable of effectively reducing tire weight while maintaining wear resistance, steering stability, and low noise property sufficiently high.

【0008】[0008]

【課題を解決するための手段】この発明の空気入りラジ
アルタイヤは、ラジアルカーカスと、タイヤ周方向に対
して、比較的小さな角度で傾斜して延びるスチールコー
ドよりなる実質上一層のベルト層と、実質的にタイヤ周
方向に延びる熱収縮性有機繊維コードよりなり、ベルト
層の外周側および内周側の少なくとも一方に配設されて
ベルト層より幾分広い幅を有するベルト補助層とを具え
る空気入りラジアルタイヤであって、ベルト層コード
の、タイヤ周方向に対する傾斜方向を、ベルト層の幅方
向のそれぞれのほぼ半部で相互に相違させたものであ
る。
A pneumatic radial tire of the present invention comprises a radial carcass and a substantially single belt layer made of steel cords extending at a relatively small angle with respect to the tire circumferential direction. A belt auxiliary layer which is made of a heat-shrinkable organic fiber cord substantially extending in the tire circumferential direction and is disposed on at least one of the outer peripheral side and the inner peripheral side of the belt layer and has a width somewhat wider than that of the belt layer. In the pneumatic radial tire, the inclination directions of the belt layer cords with respect to the tire circumferential direction are made different from each other in substantially half portions in the width direction of the belt layer.

【0009】ここでより好ましくは、ベルト層を、その
幅方向のほぼ中央部分で、相互に間隔をおいて、もしく
は相互に接触して隣接する二枚のベルト層部分によっ
て、または、その幅方向のほぼ中央部分で、好ましくは
ベルト幅の40%以下の範囲で相互に重なり合う二枚のベ
ルト層部分によって構成する。
More preferably here, the belt layer is formed by two belt layer portions which are adjacent to each other at a substantially central portion in the width direction thereof, spaced apart from each other, or in contact with each other, or in the width direction thereof. Of the two belt layer portions which overlap each other in the range of not more than 40% of the belt width.

【0010】また好ましくは、二枚のベルト層部分を相
互に隣接させてベルト層を構成したところにおいて、そ
のベルト層の幅方向のほぼ中央部分の外周側に他の補強
層を配設する。
Further, preferably, when the two belt layer portions are adjacent to each other to form the belt layer, another reinforcing layer is disposed on the outer peripheral side of the belt layer substantially in the center in the width direction.

【0011】[0011]

【作用】この空気入りラジアルタイヤでは、スチールコ
ードよりなるベルト層を実質上一層としていることか
ら、タイヤ重量を効果的に低減させることができる。し
かも、そのベルト層のスチールコードは、ベルト層幅方
向のそれぞれのほぼ半部で、タイヤ周方向に対して相互
に異なった方向に傾斜していることから、補強構造をタ
イヤ赤道面に対してほぼ対称とすることができ、従っ
て、タイヤへの内圧の充填に際する、十分な保形性を付
与することができる。
In this pneumatic radial tire, since the belt layer made of steel cord is substantially one layer, the tire weight can be effectively reduced. Moreover, since the steel cords of the belt layer are inclined in different directions with respect to the tire circumferential direction in almost each half portion of the belt layer width direction, the reinforcing structure is attached to the tire equatorial plane. The shape can be substantially symmetrical, and therefore, sufficient shape retention can be imparted when the tire is filled with the internal pressure.

【0012】加えてここでは、スチールコードによって
ベルト層を構成していることから、トレッドクラウン部
の、周方向および幅方向の外力に対する十分な剛性を確
保して、耐摩耗性および操縦安定性の低下を有効に防止
することができ、また、ベルト層の外周側および内周側
の少なくとも一方に、実質的にタイヤ周方向に延びるコ
ードよりなるベルト補助層を配設することによって、ベ
ルト層を一層としてなお、必要にして十分なたが効果を
もたらすことができる。
In addition, here, since the belt layer is made of steel cord, sufficient rigidity of the tread crown portion against an external force in the circumferential direction and the width direction is ensured, and wear resistance and steering stability are improved. It is possible to effectively prevent the decrease, and by disposing a belt auxiliary layer made of a cord substantially extending in the tire circumferential direction on at least one of the outer peripheral side and the inner peripheral side of the belt layer, the belt layer is formed. As a further layer, the necessary and sufficient effects can be brought about.

【0013】[0013]

【実施例】以下にこの発明の実施例を図面に基づいて説
明する。図1はこの発明の一実施例を示す図であり、図
1(a) はトレッド幅方向の要部断面図を、また、図1
(b) は、それぞれのコード層の平面図をそれぞれ示す。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of the present invention. FIG. 1 (a) is a sectional view of a main part in the tread width direction, and FIG.
(b) shows a plan view of each code layer.

【0014】ここでは、ラジアルカーカス11を、1500d/
2 のポリエステルコードをタイヤ周方向に対して90度の
角度で延在させてなるカーカスプライの一枚にて構成す
るとともに、このラジアルカーカス11のクラウン部の外
周側に、スチールコード(1×5)よりなる実質上一層
のベルト層12を配設する。
Here, the radial carcass 11 is 1500d /
It consists of one piece of carcass ply made by extending 2 polyester cords at an angle of 90 degrees with respect to the tire circumferential direction, and a steel cord (1 x 5) is provided on the outer peripheral side of the crown portion of the radial carcass 11. ) Is disposed on the belt layer 12.

【0015】ここで、この例のベルト層12は、左右各半
部のベルト層部分12a, 12bを、そのベルト層12の幅方向
の中央部分で相互に隣接させるとともに、それらのそれ
ぞれのベルト層部分12a, 12bのスチールコードを、タイ
ヤ周方向に対して22度の角度で相互に対称に延在させる
ことによって構成してなる。
Here, in the belt layer 12 of this example, the belt layer portions 12a and 12b in the left and right halves are made adjacent to each other at the center portion in the width direction of the belt layer 12 and their respective belt layers are formed. The steel cords of the portions 12a and 12b are formed by extending symmetrically with respect to each other at an angle of 22 degrees with respect to the tire circumferential direction.

【0016】なお図に示すところでは、それぞれのベル
ト層部分12a, 12bを、ベルト層12の中央部分で相互に突
き合わせて、いいかえれば、両ベルト層部分12a, 12bの
間隔を零として配設しているが、それらのベルト層部分
12a, 12bを、好ましくはベルト層12の幅W0 の10%以下
の間隔をおいて配設することもできる。
In the figure, the respective belt layer portions 12a, 12b are butted against each other at the central portion of the belt layer 12, in other words, the distance between the belt layer portions 12a, 12b is set to zero. But those belt layer parts
It is also possible to arrange 12a and 12b at intervals of preferably 10% or less of the width W 0 of the belt layer 12.

【0017】このようにして形成したベルト層12のさら
に外周側には、1260d/2 のナイロンコードの複数本、た
とえば4〜15本をゴムコーティングしてなる帯状リボン
13a を螺旋状に巻回することによって、ベルト層12をそ
の全幅にわたって覆って、実質上ベルト層12に直接接触
するベルト補助層13を形成する。
On the outer peripheral side of the belt layer 12 thus formed, a belt-shaped ribbon formed by rubber-coating a plurality of 1260d / 2 nylon cords, for example, 4 to 15 cords.
By spirally winding 13a, the belt layer 12 is covered over its entire width to form a belt auxiliary layer 13 that is in direct contact with the belt layer 12.

【0018】さら図示例では、ベルト補助層13の外周側
で、ベルト層12の幅方向の中央部分と対応して、両ベル
ト層部分12a, 12bに跨がって位置する、ベルト補助層13
と同様の有機繊維コードよりなる補強層14を配設する。
ここで、この補強層14の幅Wは、ベルト層12の幅W0
対して10%〜30%とすることが好ましい。
Further, in the illustrated example, the belt auxiliary layer 13 is located on the outer peripheral side of the belt auxiliary layer 13 so as to correspond to the central portion in the width direction of the belt layer 12 and to straddle both belt layer portions 12a and 12b.
A reinforcing layer (14) made of the same organic fiber cord is arranged.
Here, the width W of the reinforcing layer 14 is preferably 10% to 30% of the width W 0 of the belt layer 12.

【0019】このような空気入りラジアルタイヤでは、
スチールコードよりなるベルト層12が実質的に一層であ
るので、タイヤ重量を有効に低減させることができ、ま
た、そのベルト層12のスチールコードが、ベルト層12の
中央部分に対して相互に逆方向へ対称に延在することか
ら、タイヤへの内圧充填に際する保形性を十分に確保す
ることができる。
In such a pneumatic radial tire,
Since the belt layer 12 made of steel cord is substantially one layer, the tire weight can be effectively reduced, and the steel cord of the belt layer 12 is opposite to the central portion of the belt layer 12. Since it extends symmetrically in the direction, it is possible to sufficiently secure the shape retention property when the tire is filled with the internal pressure.

【0020】しかもこのタイヤでは、ベルト層コードを
スチールコードとしていることにより、トレッドクラウ
ン部の周方向および幅方向の剛性を十分大ならしめて、
耐摩耗性および操縦安定性の低下を効果的に防止するこ
とができ、また、ベルト層12の外周側にベルト補助層13
を設けることによって、必要にして十分なたが効果を発
揮させることができる。そしてこのたが効果は、それぞ
れのベルト層部分12a,12bの隣接部分に跨がって位置す
る補強層14を配設した場合にとくに顕著となる。
Moreover, in this tire, since the belt layer cord is made of steel cord, the rigidity of the tread crown portion in the circumferential direction and the width direction is sufficiently increased,
It is possible to effectively prevent the deterioration of wear resistance and steering stability, and further, the belt auxiliary layer 13 is provided on the outer peripheral side of the belt layer 12.
By providing, it is possible to exert the necessary and sufficient effect. And, this effect is particularly remarkable when the reinforcing layer 14 is disposed so as to straddle the adjacent portions of the belt layer portions 12a and 12b.

【0021】図2は、この発明の他の実施例を示す図で
あり、これは、それぞれのベルト層部分12a, 12bを、ベ
ルト層12の中央部分で相互に重なり合わせて位置させる
点、および、前述した補強層14を配設しない点を除い
て、図1に示す実施例とほぼ同様のタイヤである。
FIG. 2 shows another embodiment of the present invention in which the respective belt layer portions 12a, 12b are located at the central portion of the belt layer 12 and overlap each other, and The tire is almost the same as the embodiment shown in FIG. 1 except that the reinforcing layer 14 is not provided.

【0022】なおここで、それぞれのベルト層部分12a,
12bの重ね合わせ幅Wa は、ベルト層12の幅W0 の40%
以下とすることが好ましく、このことによれば、ベルト
層重量を有効に低減させてなお、タイヤの耐摩耗性およ
び操縦安定性を向上させることができる。
Here, each belt layer portion 12a,
The overlapping width W a of 12b is 40% of the width W 0 of the belt layer 12.
The following is preferable, and the weight of the belt layer can be effectively reduced, and the wear resistance and steering stability of the tire can be improved.

【0023】かかるタイヤもまた、この発明に固有の構
成を具えることにより、図1について述べた実施例と同
様の作用効果をもたらすことができる。
Such a tire can also provide the same operation and effect as the embodiment described with reference to FIG. 1 by including the constitution unique to the present invention.

【0024】以上この発明を図示例に基づいて説明した
が、それぞれのベルト層部分12a, 12bの幅を必ずしも同
一幅とする必要はなく、たとえば5:5〜3:7程度の
範囲内で適宜に変更して、ベルト層の幅方向で、一方方
向へ傾斜するコード領域と、他方へ傾斜するコード領域
との幅に差をつけることもでき、また、ベルト補助層13
を、ベルト12の内周側だけに、または、内周側および外
周側の双方に配設することもできる。
Although the present invention has been described above based on the illustrated example, the widths of the belt layer portions 12a and 12b do not necessarily have to be the same width, and are appropriately within a range of, for example, 5: 5 to 3: 7. It is also possible to change the width of the cord region that is inclined in one direction and the width of the cord region that is inclined in the other direction in the width direction of the belt layer.
Can be arranged only on the inner peripheral side of the belt 12 or on both the inner peripheral side and the outer peripheral side.

【0025】(比較例)以下に、発明タイヤと、従来タ
イヤとのタイヤ重量、耐摩耗性、操縦安定性および転が
り抵抗に関する比較試験について説明する。 ◎供試タイヤ サイズが175/70 SR 13のタイヤ。 ・発明タイヤ1 図1について述べた構成を有するタイヤであって、充填
内圧を3.0kg/cm2 としたもの。 ・発明タイヤ2 図2について述べた構成を有するタイヤであって、充填
内圧を3.0kg/cm2 としたもの。 ・従来タイヤ1 図3に示す構成を有するタイヤであって、各コード層の
材質、延在方向などを発明タイヤ1と同一としたもの。
なお充填内圧は1.9kg/cm2 とした。 ・従来タイヤ2 図4に示す構成を有するタイヤであって、各コード層の
材質、延在方向などを発明タイヤ1と同一としたもの。
なお充填内圧は2.5kg/cm2 とした。
(Comparative Example) A comparative test regarding the tire weight, abrasion resistance, steering stability and rolling resistance between the inventive tire and the conventional tire will be described below. ◎ Test tire Size 175/70 SR 13 tire. Inventive tire 1 A tire having the configuration described with reference to FIG. 1 and having a filling internal pressure of 3.0 kg / cm 2 . Inventive tire 2 A tire having the structure described with reference to FIG. 2 and having a filling internal pressure of 3.0 kg / cm 2 . Conventional tire 1 A tire having the configuration shown in FIG. 3, in which the material of each cord layer, the extending direction, and the like are the same as those of the invention tire 1.
The filling internal pressure was 1.9 kg / cm 2 . Conventional tire 2 A tire having the configuration shown in FIG. 4, in which the material of each cord layer, the extending direction, and the like are the same as those of the invention tire 1.
The filling internal pressure was 2.5 kg / cm 2 .

【0026】◎試験方法 タイヤ重量については、各重量を直接的に測定すること
により評価し、耐摩耗性については、実車走行テストを
行った後の摩耗量を測定して評価し、操縦安定性につい
ては、フラットベルト式操縦試験機によってコーナリン
グパワーを測定して評価し、転がり抵抗については、FO
RCE 式転がり抵抗試験機を用い、スリップしない最小荷
重の作用下で、80km/hの速度で正転および逆転させたと
きの転がり抵抗を測定して評価した。
◎ Test method The tire weight was evaluated by directly measuring each weight, and the wear resistance was evaluated by measuring the wear amount after the actual vehicle running test, and the steering stability was evaluated. For the rolling resistance, the cornering power was measured and evaluated by a flat belt type operation tester.
Using an RCE type rolling resistance tester, the rolling resistance was measured and evaluated under normal load and reverse rotation at a speed of 80 km / h under the action of minimum load without slipping.

【0027】◎試験結果 上記各試験の結果を、従来タイヤ1をコントロールとし
て、表1に指数をもって表示する。なお指数値は、タイ
ヤ重量を除き、大きいほどすぐれた結果を示すものとす
る。
◎ Test Results The results of each of the above tests are shown in Table 1 as an index, using the conventional tire 1 as a control. The index value, excluding the weight of the tire, indicates a better result as the index value is larger.

【0028】[0028]

【表1】 [Table 1]

【0029】表1に示すところによれば、発明タイヤは
いずれも、従来タイヤ1に比して、タイヤ重量および転
がり抵抗を有効に低減させ得ることが明らかであり、な
かでも、発明タイヤ2では、耐摩耗性および操縦安定性
を効果的に向上させ得ることが明らかである。
As shown in Table 1, it is clear that all of the invention tires can effectively reduce the tire weight and rolling resistance as compared with the conventional tire 1. Among them, the invention tire 2 It is clear that the wear resistance and steering stability can be effectively improved.

【0030】[0030]

【発明の効果】かくして、この発明によれば、タイヤの
耐摩耗性および操縦安定性を十分高く維持してなお、タ
イヤの重量、ひいては転がり抵抗を効果的に低減させる
ことができる。
As described above, according to the present invention, the wear resistance and steering stability of the tire can be maintained sufficiently high and the weight of the tire, and thus the rolling resistance, can be effectively reduced.

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

【図1】この発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.

【図2】この発明の他の実施例を示す図である。FIG. 2 is a diagram showing another embodiment of the present invention.

【図3】従来例を示す図である。FIG. 3 is a diagram showing a conventional example.

【図4】他の従来例を示す図である。FIG. 4 is a diagram showing another conventional example.

【符号の説明】[Explanation of symbols]

11 ラジアルカーカス 12 ベルト層 12a, 12b ベルト層部分 13 ベルト補強層 13a 帯状リボン 14 補強層 11 Radial carcass 12 Belt layers 12a, 12b Belt layer portion 13 Belt reinforcement layer 13a Strip ribbon 14 Reinforcement layer

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ラジアルカーカスと、タイヤ周方向に対
して、比較的小さな角度で傾斜して延びるスチールコー
ドよりなる実質上一層のベルト層と、実質的にタイヤ周
方向に延びる熱収縮性有機繊維コードよりなり、ベルト
層の外周側および内周側の少なくとも一方に配置されて
ベルト層より幾分広い幅を有するベルト補助層とを具え
る空気入りラジアルタイヤであって、 ベルト層コードの、タイヤ周方向に対する傾斜方向を、
ベルト層幅方向のそれぞれのほぼ半部で相互に相違させ
てなる空気入りラジアルタイヤ。
1. A substantially single belt layer made of a radial carcass, steel cords extending at a relatively small angle to the tire circumferential direction, and heat-shrinkable organic fibers extending substantially in the tire circumferential direction. A pneumatic radial tire comprising a cord and a belt auxiliary layer which is arranged on at least one of an outer peripheral side and an inner peripheral side of the belt layer and has a width somewhat wider than that of the belt layer. The tilt direction with respect to the circumferential direction,
Pneumatic radial tires that differ from each other in almost half of the belt layer width direction.
【請求項2】 前記ベルト層を、その幅方向のほぼ中央
部分で相互に隣接する二枚のベルト層部分により構成し
てなる請求項1記載の空気入りラジアルタイヤ。
2. The pneumatic radial tire according to claim 1, wherein the belt layer is composed of two belt layer portions that are adjacent to each other at a substantially central portion in the width direction.
【請求項3】 前記ベルト層を、その幅方向のほぼ中央
部分で相互に重なり合う二枚のベルト層部分により構成
してなる請求項1記載の空気入りラジアルタイヤ。
3. The pneumatic radial tire according to claim 1, wherein the belt layer is composed of two belt layer portions that overlap each other at a substantially central portion in the width direction.
【請求項4】 前記ベルト層の、幅方向のほぼ中央部分
の外周側に補強層を配設してなる請求項1もしくは2記
載の空気入りラジアルタイヤ。
4. The pneumatic radial tire according to claim 1 or 2, wherein a reinforcing layer is provided on an outer peripheral side of a substantially central portion in the width direction of the belt layer.
JP4084151A 1992-04-06 1992-04-06 Pneumatic radial tire Pending JPH05286309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4084151A JPH05286309A (en) 1992-04-06 1992-04-06 Pneumatic radial tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4084151A JPH05286309A (en) 1992-04-06 1992-04-06 Pneumatic radial tire

Publications (1)

Publication Number Publication Date
JPH05286309A true JPH05286309A (en) 1993-11-02

Family

ID=13822508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4084151A Pending JPH05286309A (en) 1992-04-06 1992-04-06 Pneumatic radial tire

Country Status (1)

Country Link
JP (1) JPH05286309A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08156519A (en) * 1994-12-09 1996-06-18 Bridgestone Corp Pneumatic radial tire
JPH08318706A (en) * 1994-12-09 1996-12-03 Bridgestone Corp Pneumatic radial tire
JPH09156313A (en) * 1995-12-08 1997-06-17 Bridgestone Corp Pneumatic radial tire
WO2004041554A1 (en) * 2002-11-08 2004-05-21 Fuji Seiko Co., Ltd. Radial tire with circumferential spirally wound belt layer
KR100493829B1 (en) * 2002-09-27 2005-06-08 한국타이어 주식회사 Radial Tire Tread Having Belt Flies
KR100626560B1 (en) * 1999-02-23 2006-09-22 요코하마 고무 가부시키가이샤 Pneumatic tire and process for fabricating the same
US20130228262A1 (en) * 2010-11-22 2013-09-05 Barbara Rampana Method of increasing performance and comfort of a tyre for vehicle wheels and tyre for vehicle wheels
WO2014065298A1 (en) * 2012-10-22 2014-05-01 株式会社ブリヂストン Pneumatic tire
US20150000817A1 (en) * 2012-02-15 2015-01-01 Bridgestone Corporation Pneumatic tire for two-wheeled motor vehicle

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08156519A (en) * 1994-12-09 1996-06-18 Bridgestone Corp Pneumatic radial tire
JPH08318706A (en) * 1994-12-09 1996-12-03 Bridgestone Corp Pneumatic radial tire
JPH09156313A (en) * 1995-12-08 1997-06-17 Bridgestone Corp Pneumatic radial tire
KR100626560B1 (en) * 1999-02-23 2006-09-22 요코하마 고무 가부시키가이샤 Pneumatic tire and process for fabricating the same
KR100493829B1 (en) * 2002-09-27 2005-06-08 한국타이어 주식회사 Radial Tire Tread Having Belt Flies
WO2004041554A1 (en) * 2002-11-08 2004-05-21 Fuji Seiko Co., Ltd. Radial tire with circumferential spirally wound belt layer
KR100766097B1 (en) * 2002-11-08 2007-10-12 후지 세이코 가부시키가이샤 Radial tire with circumferential spirally wound belt layer
CN100366446C (en) * 2002-11-08 2008-02-06 不二精工株式会社 Radial tire with circumferential spirally wound belt layer
US7337817B2 (en) 2002-11-08 2008-03-04 Fuji Seiko Co., Ltd. Radial tire with circumferential spirally wound belt layer
US20130228262A1 (en) * 2010-11-22 2013-09-05 Barbara Rampana Method of increasing performance and comfort of a tyre for vehicle wheels and tyre for vehicle wheels
US20150000817A1 (en) * 2012-02-15 2015-01-01 Bridgestone Corporation Pneumatic tire for two-wheeled motor vehicle
WO2014065298A1 (en) * 2012-10-22 2014-05-01 株式会社ブリヂストン Pneumatic tire

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