JPS61178204A - Pneumatic tire for heavy-load use - Google Patents
Pneumatic tire for heavy-load useInfo
- Publication number
- JPS61178204A JPS61178204A JP60018584A JP1858485A JPS61178204A JP S61178204 A JPS61178204 A JP S61178204A JP 60018584 A JP60018584 A JP 60018584A JP 1858485 A JP1858485 A JP 1858485A JP S61178204 A JPS61178204 A JP S61178204A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- belt
- group
- layers
- width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
大荷車用空気入りタイヤ、なかでも航空機の滑１５走の
使途におけるようなこの種のラジアルタイヤの適合に関
して、この明細書には、高速走行の際における耐久性と
、操縦安定性の両立、とりわけ、ベルト補強についての
耐久寿命の向上に関する開発研究の成果を提案しようと
するものである。 ！・・（従来の技術）
ラジアルタイヤは、互いに交差するコード配列とした複
数のベルト層によってトレッド部強化に供するを例とす
るところ、航空機用タイヤとして使用される際、ショル
ダ一部付近にてトレッド部・。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) With regard to the suitability of pneumatic tires for heavy goods vehicles, in particular radial tires of this type, such as in aircraft runway applications, this specification contains This paper attempts to propose the results of research and development on how to achieve both durability and handling stability during belt reinforcement, particularly on improving the durability life of belt reinforcement. ! (Prior art) For example, in a radial tire, the tread is strengthened by multiple belt layers arranged in a cord arrangement that intersects with each other.When used as an aircraft tire, the tread is strengthened near a part of the shoulder. Department.
の円周に沿うベルト張力の不足により、高速定行中、い
わゆるスタンディングウェーブが発生しがちであり、こ
のためタイヤの耐久性を著しく低下させるおそれがある
。Due to insufficient belt tension along the circumference of the tire, so-called standing waves tend to occur during high-speed running, which can significantly reduce the durability of the tire.
特公昭５７−２０１７０１号、同２０１７０２ ＋ｃ１
号各公報においては、上記問題に関して、トレッド部の
円周に対し８０°以下の傾斜配列としたコードよりなる
複数のベルト層につき、放射断面におけるベルト層の側
方部にて、その中央部に比し伸展性の高いコード材を用
いるとともに、タイヤＩ５への内圧光てんによってショ
ル１ダ一部の成長を大きく促すようなカーカスラインを
採用すること、また特公昭５７−２０１７０４号公報に
は、伸展性と、加硫中の熱作用による熱収縮性とをもつ
コードで形成した複数枚のベルト層をもつグリーン！０
タイヤを、放射軸外側に向って凹形形状のモール１ド中
で加硫することが、それぞれ開示されていて、何れも航
空機の離着陸時相当の高速走行に対する耐久性確保に有
効とは云え、コーナリングパワーの不所望な低下を伴う
ので、たとえば誘導路走行５つまりタキシレグ時の操縦
安定性が害されるところに問題を残している。Special Publication No. 57-201701, No. 201702 +c1
Regarding the above-mentioned problem, each of the publications discloses that, for a plurality of belt layers consisting of cords arranged at an angle of 80 degrees or less with respect to the circumference of the tread part, a In addition to using a cord material with higher extensibility than that of the tire I5, a carcass line that greatly promotes the growth of a part of the shoulder 1 by applying internal pressure to the tire I5 is also adopted, and Japanese Patent Publication No. 57-201704 states, A green product with multiple belt layers made of cords that are both stretchable and heat-shrinkable due to the heat action during vulcanization! 0
It is disclosed that the tire is vulcanized in a concave mold 1 toward the outside of the radial axis, and although both methods are effective in ensuring durability against high-speed travel equivalent to the time of takeoff and landing of an aircraft, Since this is accompanied by an undesirable reduction in cornering power, there remains a problem in that the steering stability is impaired, for example, during taxi-leg travel.
（発明が解決しようとする問題点）
大荷車用空気入りラジアルタイヤの高速走行中における
スタンディングウェーブの発生を、コーＩｌｌナリング
パワーの低下を伴うことなく適切に回避し得るトレッド
部強化構造を与えることがこの発明の目的である。(Problems to be Solved by the Invention) To provide a tread portion reinforcement structure capable of appropriately avoiding the generation of standing waves during high-speed running of a pneumatic radial tire for heavy-duty vehicles without reducing the running power of the pneumatic radial tire. is the purpose of this invention.
Ｃ問題点を解決するための手段）
上記の目的は次の事項にて有効に成就される。１５タイ
ヤの赤道面と９０°〜７５０の角度で交わる向きにて互
いに平行配列をなす放射方向コードブライからなる塾生
くとも１枚のトロイダ′ル状カーカスと、このカーカス
のクラウン部を取巻いて互いに平行配列をなすコードよ
りなり、タイヤのト２・夏、レッド部強化に供したベル
トとを、主補強とする１空気入りラジアルタイヤであっ
て、ベルトが、タイヤの□赤道面と実質的に平行な向き
のコード配列になる複数層の第１群と、タイヤの赤道面
に対し１５°〜６５６の角度に傾斜するコード配列にな
る５複数層の第２群とからなり、
第１群ベルト層の少くとも１枚は、タイヤの正１．１’
Ｏ倍をこえる配置幅をもち、
を異に呈てそれぞれ、カーカスのブライ、第１層ベルト
層および他の第２群ベルト層の何れかの層間に挟在し、
タイヤの正規内圧、正規荷重条件下のトレッド部接地幅
および数行方向の内側と外側それぞれに最も近く存在す
る第１群ベルトの配置１５幅を越゛えない配置幅をもつ
ものとした、大荷車用空気入りタイヤ。Means for solving problem C) The above purpose can be effectively achieved by the following items. 15 At least one toroidal carcass consisting of radial cord braids arranged parallel to each other in a direction intersecting the equatorial plane of the tire at an angle of 90° to 750°, and a toroidal carcass surrounding the crown part of this carcass. This is a pneumatic radial tire consisting of cords arranged parallel to each other and whose main reinforcements are belts used to strengthen the tire's front, rear and red sections. The first group consists of a plurality of layers with a cord arrangement parallel to the tire, and a second group of five layers with a cord arrangement inclined at an angle of 15° to 656 with respect to the equatorial plane of the tire. At least one of the belt layers is approximately 1.1' of the tire.
have an arrangement width exceeding O times, and are sandwiched between the braai of the carcass, the first belt layer, and the other second group belt layers, respectively, with different
A large tire with an arrangement width that does not exceed the normal internal pressure of the tire, the tread contact width under normal load conditions, and the arrangement width of the first group belts that are closest to the inside and outside in several row directions. Pneumatic tires for carts.
ここにベルトおよびカーカスは、有機繊維コードからな
゛ることが、実施態様として推奨される。Here, it is recommended as an embodiment that the belt and carcass are made of organic fiber cord.
さて第１ｒＡにてこの発明の一般的適用事例につｒｕい
てタイヤ断面を、第２図（ａ ｌ 、 （ｂ ｌ 、
（ｃ １１にて種々なベルト積層要領の変形を図解した
。Now, in Section 1rA, the tire cross section is shown in Fig. 2 (a l, (b l,
(C 11 illustrates various variations of belt stacking procedures.
図中１は図示例にて有機繊維コードよりなる２枚の放射
方向ブライａ、ｂを用いたカーカス、２はベルトであり
、８はビードコア、４はチェーン５アー、また５、６は
硬、軟両ゴムのステイフナ−である。またカーカス１は
、金属とくにスチールのワイヤコードによるブライであ
っても良い。In the figure, 1 is a carcass using two radial braids a and b made of organic fiber cords in the illustrated example, 2 is a belt, 8 is a bead core, 4 is a chain 5, and 5 and 6 are hard, This is a stiffener for both soft and rubber. The carcass 1 may also be made of wire cord made of metal, especially steel.
ベルト２は、カーカス１のクラウン部を取巻い−て互い
に平行配列をなす、好ましくは有機繊維コ１゜−ドより
なるが、タイヤの赤道面と実質的に平行なコード配列と
した複数層の第１群α（整列ベルト層）と、タイヤの赤
道面に対し１５°〜６５゜の角度に傾斜するコ」ド配列
とした複数層の第２群β（交錯ベルト層）とに区分する
。The belt 2 surrounds the crown portion of the carcass 1 and is preferably made of organic fiber cords arranged parallel to each other, but may include a plurality of layers of cords arranged substantially parallel to the equatorial plane of the tire. It is divided into a first group α (aligned belt layer) and a second group β (intersecting belt layer), which is a plurality of layers arranged in a corded arrangement inclined at an angle of 15° to 65° with respect to the equatorial plane of the tire.
第１群αのベルト層のうち少くとも１枚は、タイヤの正
規内圧、正規荷重条件下におけるトレッド部７の接地幅
Ｗの１．１０倍よりも大きい配置幅とする。At least one of the belt layers of the first group α has an arrangement width that is larger than 1.10 times the ground contact width W of the tread portion 7 under normal internal pressure and normal load conditions of the tire.
第２群βのベルト層は、互いに他に対する傾斜２゜の向
きを異にする交錯ベルト層として、それぞれ１カーカス
ｌのブライ、第１群αのベルト層あるいは他の第２群β
のベルト層の何れかの層間に挟在し、しかも、タイヤの
正規内圧、正規荷重条件下のトレッド部の接地幅Ｗおよ
び放射方向の内側と５外側それぞれに最も近く存在する
第１群αのベルト層の配置幅を越えない配置幅とする。The belt layers of the second group β are arranged as intersecting belt layers having different directions of inclinations of 2° relative to each other, in each case the belt layers of one carcass l, the belt layers of the first group α or the other belt layers of the second group β.
of the first group α, which is sandwiched between any of the belt layers, and which is closest to the ground contact width W of the tread portion under normal internal pressure and normal load conditions of the tire, and to the inner and outer sides in the radial direction. The arrangement width should not exceed the arrangement width of the belt layer.
（作用）
この発明において第１群αのベルト層のうちの少くとも
１枚を正規内圧、正規荷重条件下のトレ１゜ラド部接地
幅対比１．１０倍以上の配置幅にてショルダ一部ないし
バントレス部に延長して配置し、ショルダ一部ないしバ
ットレス部における高い周方向張力を充分得ることによ
り高速走行時にトレッド部のけり出し部附近において、
荷重によるた１５わみ変形の速やかな回復と振動の減衰
を促がし、もってスタンディングウェーブの発生を遅ら
せる作用をもたらすとともにベルト部の耐久レベル向上
に大きく貢献させることができる。(Function) In the present invention, at least one of the belt layers of the first group α is placed on a part of the shoulder at a width that is at least 1.10 times the ground contact width of the tray 1° radius under normal internal pressure and normal load conditions. By arranging it in an extended manner in the shoulder part or buttress part, and obtaining sufficient high circumferential tension in the shoulder part or buttress part, near the protruding part of the tread part during high-speed running,
It promotes prompt recovery from flexural deformation caused by load and attenuation of vibration, thereby delaying the occurrence of standing waves and greatly contributing to improving the durability level of the belt portion.
また第２群βにおける交錯ベルト層の存在は１．！（・
荷重状態において接地面内でタイヤ回転軸方向に１生じ
る横の変形に対する剛性を、第１群αのベルト層のみの
積層構造の場合に比してより、充分に高めるのに役立つ
。特にこの効果を高めるには、交錯層ベルトのコード角
度を１５°〜６５°）範囲５に限定することが必要であ
る。Moreover, the presence of the intersecting belt layer in the second group β is 1. ! (・
This helps to sufficiently increase the rigidity against lateral deformation that occurs in the tire rotational axis direction within the ground contact surface under load, more than in the case of the laminated structure of only the belt layer of the first group α. In particular, to enhance this effect, it is necessary to limit the cord angle of the interlaced layer belt to a range 5 (15° to 65°).
次表は第１図のベルト構造を採り、交錯ベルトの角度を
変化させた場合のコーナリングパワーの数値例である。The following table shows numerical examples of cornering power when the belt structure shown in Figure 1 is adopted and the angle of the intersecting belts is changed.
値は指数を示し、同一サイズのバイアスタイヤのコーナ
リングパワー値を１００とｉ。The value indicates an index, and the cornering power value of bias tires of the same size is 100 and i.
した。did.
コーナリングパワーは、交錯ベルト層の枚数を増加させ
る事により、表１の値より更に上昇させる事が可能であ
る。The cornering power can be further increased from the values shown in Table 1 by increasing the number of intersecting belt layers.
ここで一般に、交錯ベルト層のみの積層体やそ２（１の
単なる整列ベルト層との組み合せ積層体では、１交錯ベ
ルト層端部近傍に、荷重状態において主に円周方向層間
剪断変形をベルト層間に生じて、この変形が走行による
ベルト端部故障の主なる原因になる。In general, in a laminate with only an intersecting belt layer or a laminate in combination with a simple aligned belt layer (1), under load, interlaminar shear deformation in the circumferential direction is mainly applied to the belt near the end of the 1 intersecting belt layer. This deformation occurs between the layers and is the main cause of belt end failure due to running.
故に交錯ベルト層の配置幅は、ベルト端の耐久を考慮し
て、正規内圧、正規荷重条件下におけるトレッド部２の
接地幅Ｗを越えない様に設定すべきであり、これは主に
、荷重時の放射断面内のベルト部変形において、曲げに
よる円周方向の伸び１０を最も強く受ける接地端からバ
ットレス部の位置を避け、ベルト端に加わる変形入力を
減少させることを意図している。Therefore, the arrangement width of the intersecting belt layer should be set so as not to exceed the ground contact width W of the tread portion 2 under normal internal pressure and normal load conditions, considering the durability of the belt end. This is intended to reduce the deformation input applied to the belt end by avoiding the position of the buttress part from the ground end, which is most strongly affected by the circumferential elongation 10 due to bending, during belt deformation in the radial cross section.
更に、交錯ベルト層の全幅にわたり、タイヤの放射方向
内外に最も近く存在する整列ベルト層に１５よって完全
におおうことが、荷重時変形において交錯ベルト層の各
々の端部の周方向動きを有効に抑制するために必要で、
交錯ベルト層の配置幅が、放射方向内外で交錯ベルト層
を挾む整列ベルト層の配置幅を越える場合、交錯ベルト
層端部の円周！・・に沿う動き、あるいは層間剪断歪が
はるかに大と１なり走行早期に交錯ベルト層端部にセパ
レーションを生じ故障に至ることが確認されている。Furthermore, the entire width of the interlaced belt layer is completely covered by the alignment belt layer 15 that is closest to the inner and outer sides of the tire in the radial direction, thereby effectively enabling the circumferential movement of each end of the intersecting belt layer during deformation under load. necessary to suppress
If the arrangement width of the intersecting belt layers exceeds the arrangement width of the aligned belt layers that sandwich the intersecting belt layers inside and outside in the radial direction, the circumference of the ends of the intersecting belt layers! It has been confirmed that if the belt moves along ... or if the interlayer shear strain becomes much larger than 1, separation occurs at the end of the intersecting belt layers at an early stage of running, leading to failure.
一方、走行状態において接地面内でタイヤの回転軸方向
に生じるベルトの横変形に対しても、整列ベルト層によ
り全幅にわたって完全に挾まれる交錯ヘルド層の端部は
、セパレーションを起すことなく充分耐久レベルを満足
することができ、しかも、接地面内でタイヤ回転軸方向
に生じるサイドフォースに抗する剛性は、交錯ベルト端
の見か１＋１けの円周方向剛性が強化されることのため
にコーナリングパワーが上昇し、過大横力に対する操縦
安定性を増すという効果をも生む。On the other hand, even against lateral deformation of the belt that occurs in the tire's rotational axis direction within the ground contact surface during running, the ends of the intersecting heald layer, which are completely sandwiched over the entire width by the aligned belt layer, are able to withstand the lateral deformation of the belt without causing separation. The durability level can be satisfied, and the rigidity to withstand the side force generated in the direction of the tire's rotational axis within the ground contact area is due to the increased circumferential rigidity of the ends of the intersecting belt by an order of magnitude of 1+1. It also has the effect of increasing cornering power and increasing steering stability against excessive lateral forces.
（実施例１
４０Ｘ１４−１６サイズの航空機用タイヤに用１′・い
たベルト部の構造を第１図に示す。このタイヤは２枚の
カーカスブライを含み、これらの両端は左右に一対存在
するビードコアー８にそれぞれ巻きつけられている。タ
イヤのトレッド中には複数のベルト層が配置されている
。放射方向のカーカー・・スブライ、およびベルト層に
は８０００ ｄ／８の １芳香族ポリアミドコードを使
用している。このサイズのタイヤは２８２００ ＬｂＳ
の荷重と１ ？ Ｏｐ８１の充てん内圧において平坦路
面との間に２８０ ｗ幅に等しい接触領域を有する。第
２図においてべ−。(Example 1 Figure 1 shows the structure of a belt used in a 40x14-16 size aircraft tire. This tire includes two carcass brises, each of which has a pair of bead cores on the left and right.) Each belt is wrapped around a 8000 d/8 1 aromatic polyamide cord. This size tire is 28200 LbS
The load and 1? At the filling internal pressure of Op81, it has a contact area equal to 280 W width with the flat road surface. In Figure 2.
ルト１１ベルト８、ベルト５の角度を０８（周方向）と
し、ベルト２を＋６５°、ベルト４を一６５°としてベ
ルトのペリフェリに沿う軸方向幅を以下の様に定めたタ
イヤを試作した。A tire was prototyped in which the angle of belt 11, belt 8, and belt 5 was set to 08 (circumferential direction), belt 2 was set to +65°, belt 4 was set to -65°, and the axial width of the belt along the periphery was determined as follows.
ケースａ、ｂ、ｃの最大の周方向ベルト幅は、ＩＩＩそ
れぞれ前述の接地幅対比１．２５．１．１Ｏ１０，９８
倍の幅となっている。前述の荷重、内圧の条件下におい
てタイヤの走行速度を増し、定在波【スタンディングウ
ェーブ）の発生する速度を指数で比較した結果が表２右
の欄に示されている。The maximum circumferential belt width of cases a, b, and c is 1.25.1.1O10,98 compared to the above-mentioned ground contact width in III, respectively.
It is twice as wide. The right column of Table 2 shows the results of increasing the running speed of the tire under the above-mentioned load and internal pressure conditions and comparing the speed at which a standing wave is generated using an index.
表 ２
ここでは同サイズの従来のバイアス構造タイヤに１才ケ
ルスタンディングウェーブ発生速度を１００とした。Ｃ
のタイヤは静止より規定離陸速度までの加速を１サイク
ルとした高速耐久試験において、数サイクルの試験の繰
り返しの後、トレッド部の−。Table 2 Here, the 1-year-old Kel standing wave generation speed was set at 100 for a conventional bias structure tire of the same size. C
In a high-speed durability test in which one cycle was acceleration from standstill to a specified takeoff speed, the tire's tread showed - after several cycles of testing.
離脱故障を起した。ａ、ｂのタイヤは、上記試験のみな
らず、重荷重における走行試験においても故障に至る事
なく充分な耐久性が確認された。A breakaway failure occurred. Tires a and b were confirmed to have sufficient durability not only in the above test but also in a running test under heavy loads without causing failure.
【発明の効果）
接地幅対比１．１０倍以上のベルト幅を少なく共１０１
層を含む周方向ベルト層の存在により、航空機の離陸時
に相当する高速耐久性が保証される。また、この周方向
ベルト層に交錯ベルト層の組み合せを取り入れる事で、
周方向ベルト層のみでは達成し得なかった、接地面内に
おける回転軸方向剛１５性が上昇して操縦安定性が回復
される。更に交錯ベルト層の全幅に亘って周方向ベルト
で完全におおう事、接地幅以内に交錯ベルト幅を規定す
る事により、重荷重使用条件における交錯ベル）端゛の
耐久力を大幅に向上している。またベルト層及び２・・
、カーカスブライ層に有機繊維コードを用いると、１同
一安全率で設計したスチールコードを用いた補強体に対
し、重量を大きく軽減でき、これは航空機全体の軽量化
ひいては燃費の節減に貢献可能である。[Effect of the invention] The belt width is 1.10 times or more compared to the ground contact width.
The presence of the circumferential belt layer including the layer ensures high-speed durability corresponding to the take-off of an aircraft. In addition, by incorporating a combination of intersecting belt layers into this circumferential belt layer,
Stiffness in the rotation axis direction within the ground contact surface is increased, which could not be achieved with only the circumferential belt layer, and steering stability is restored. Furthermore, by completely covering the entire width of the intersecting belt layer with circumferential belts and by specifying the intersecting belt width within the ground contact width, the durability of the intersecting belt ends under heavy load usage conditions is greatly improved. There is. Also, the belt layer and 2...
By using organic fiber cords for the carcass braai layer, the weight can be significantly reduced compared to reinforcements using steel cords designed with the same safety factor of 1. This can contribute to reducing the overall weight of the aircraft and, in turn, reducing fuel consumption. be.
第１図は断面図、
第２図は要部断面図である。
１・・・カーカス ２・・・ベルト８・・・ピ
ートコ了−α・・・第１ 群へｋ ）β・・・第２群ベ
ルト
特許出願人 株式会社ブリヂストン
第１図
■
β ２へ’、ＬＬ
１ ・・・・
１ ６＃、スア７す特
開昭６ｌ−１７８２０４（５）
第２図
（ａ）（ｂ）
（Ｃ）Fig. 1 is a sectional view, and Fig. 2 is a sectional view of main parts. 1...Carcass 2...Belt 8...Peatco-α...To the 1st group k)β...2nd group belt Patent applicant Bridgestone Corporation Figure 1 ■ β To 2', LL 1...1 6#, Sua7su JP-A-6L-178204 (5) Figure 2 (a) (b) (C)
Claims (1)
きにて互いに平行配列をなす放射方向コードのブライか
らなる、少くとも１枚のトロイダル状カーカスと、この
カーカスのクラウン部を取巻いて互いに平行配列をなす
コードよりなり、タイヤのトレツド部強化に供したベル
トとを、主補強とする空気入りラジアルタイヤであつて
、 ベルトが、タイヤの赤道面と実質的に平行 な向きのコード配列になる複数層の第１群と、タイヤの
赤道面に対し１５°〜６５°の角度に傾斜するコード配
列になる複数層の第２群とから成り、 第１群ベルト層の少くとも１枚は、タイヤ の正規内圧、正規荷重条件下にてトレツド部接地幅の１
．１０倍をこえる配置幅をもち、第２群ベルト層は、互
いに他に対する傾斜 の向きを異にしてそれぞれ、カーカスのブライ、第１群
ベルト層および他の第２群ベルト層の何れかの層間に挟
在し、タイヤの正規内圧、正規荷重条件下のトレツド部
接地幅および放射方向内側と外側のそれぞれに最も近く
存在する第１群ベルトの配置幅を越えない配置幅をもつ
ものとしたことを特徴とする、大荷車用空気入りタイヤ
。 ２、ベルトが有機繊維コードからなる、１記載のタイヤ
。 ３、カーカスが有機繊維コードからなる１又は２記載の
タイヤ。[Scope of Claims] 1. At least one toroidal carcass consisting of radial cord braais arranged parallel to each other in a direction intersecting the equatorial plane of the tire at an angle of 90° to 75°; and this carcass. A pneumatic radial tire whose main reinforcement is a belt consisting of cords arranged parallel to each other surrounding the crown part of the tire and used to strengthen the tread part of the tire, the belt being substantially parallel to the equatorial plane of the tire. The first group consists of a plurality of layers in which the cords are arranged in a direction parallel to the tire, and a plurality of layers in the second group in which the cords are arranged in an angle of 15° to 65° with respect to the equatorial plane of the tire. At least one of the belt layers has a width of 1 of the ground contact width of the tread under normal internal pressure and normal load conditions of the tire.
．． The second group belt layers have an arrangement width of more than 10 times, and each of the second group belt layers has a different direction of inclination with respect to the other, and the interlayers of the braai of the carcass, the first group belt layer, and the other second group belt layers are different from each other. The tire shall have an arrangement width that does not exceed the ground contact width of the tread portion under the tire's normal internal pressure and normal load conditions, and the arrangement width of the first group belt that is closest to the inner and outer sides in the radial direction. A pneumatic tire for large carts featuring: 2. The tire according to 1, wherein the belt is made of an organic fiber cord. 3. The tire according to 1 or 2, wherein the carcass is made of an organic fiber cord.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60018584A JPS61178204A (en) | 1985-02-04 | 1985-02-04 | Pneumatic tire for heavy-load use |
| FR8601511A FR2608515B1 (en) | 1985-02-04 | 1986-02-04 | BELT FOR REINFORCING A TREAD FOR HIGH PERFORMANCE TIRES |
| GB8602738A GB2171067B (en) | 1985-02-04 | 1986-02-04 | Heavy duty pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60018584A JPS61178204A (en) | 1985-02-04 | 1985-02-04 | Pneumatic tire for heavy-load use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61178204A true JPS61178204A (en) | 1986-08-09 |
Family
ID=11975675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60018584A Pending JPS61178204A (en) | 1985-02-04 | 1985-02-04 | Pneumatic tire for heavy-load use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61178204A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0281706A (en) * | 1988-09-19 | 1990-03-22 | Bridgestone Corp | Pneumatic tire for heavy load |
| JPH0544606U (en) * | 1991-11-12 | 1993-06-15 | ザ・グツドイヤー・タイヤ・アンド・ラバー・カンパニー | Bias type pneumatic tire |
| JP2002539023A (en) * | 1999-03-17 | 2002-11-19 | ソシエテ ド テクノロジー ミシュラン | Crown reinforcement for radial tires |
| US7712499B2 (en) | 2002-01-24 | 2010-05-11 | Bridgestone Corporation | Pneumatic radial tire with specified belt layer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5069701A (en) * | 1973-10-23 | 1975-06-10 | ||
| JPS5551605A (en) * | 1978-10-05 | 1980-04-15 | Michelin & Cie | Pneumatic tire |
| JPS57178905A (en) * | 1981-04-03 | 1982-11-04 | Michelin & Cie | Radial carcass tire for heavy load |
-
1985
- 1985-02-04 JP JP60018584A patent/JPS61178204A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5069701A (en) * | 1973-10-23 | 1975-06-10 | ||
| JPS5551605A (en) * | 1978-10-05 | 1980-04-15 | Michelin & Cie | Pneumatic tire |
| JPS57178905A (en) * | 1981-04-03 | 1982-11-04 | Michelin & Cie | Radial carcass tire for heavy load |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0281706A (en) * | 1988-09-19 | 1990-03-22 | Bridgestone Corp | Pneumatic tire for heavy load |
| JPH0544606U (en) * | 1991-11-12 | 1993-06-15 | ザ・グツドイヤー・タイヤ・アンド・ラバー・カンパニー | Bias type pneumatic tire |
| JP2002539023A (en) * | 1999-03-17 | 2002-11-19 | ソシエテ ド テクノロジー ミシュラン | Crown reinforcement for radial tires |
| US7712499B2 (en) | 2002-01-24 | 2010-05-11 | Bridgestone Corporation | Pneumatic radial tire with specified belt layer |
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