JPH08258507A - Pneumatic radial tire - Google Patents

Pneumatic radial tire

Info

Publication number
JPH08258507A
JPH08258507A JP7066463A JP6646395A JPH08258507A JP H08258507 A JPH08258507 A JP H08258507A JP 7066463 A JP7066463 A JP 7066463A JP 6646395 A JP6646395 A JP 6646395A JP H08258507 A JPH08258507 A JP H08258507A
Authority
JP
Japan
Prior art keywords
fiber cord
layer
belt layer
cord
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
JP7066463A
Other languages
Japanese (ja)
Inventor
Kazuo Hayashi
一夫 林
Ichiro Takahashi
一郎 高橋
Masahiro Yoshida
正博 吉田
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 JP7066463A priority Critical patent/JPH08258507A/en
Publication of JPH08258507A publication Critical patent/JPH08258507A/en
Pending legal-status Critical Current

Links

Landscapes

  • Tires In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

PURPOSE: To provide a radial tire using a fiber cord as a reinforcing material, and to which the nondestructive test can be applied. CONSTITUTION: Non extending belt layers and treads are sequentially provided on the outer periphery of a crown part of a fiber cord radial carcass extending into a troidal shape, a tire including at least one layer in which a high elastic fiber cord is arranged on the belt layer so as to be inclined a little in relation to the center equatorial surface is made, a mix fiber cord 6 in which one or a small number of metallic filaments 5 are added to at least one of a fiber cord layer in the carcass 2 and the belt layer 3 is used for at least one part of the fiber cord.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は繊維コ−ドを補強材とし
て使用した、非破壊検査が容易なラジアルタイヤに関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radial tire which uses a fiber cord as a reinforcing material and which can be easily subjected to nondestructive inspection.

【0002】[0002]

【従来の技術】ラジアルタイヤは広く知られているよう
に、基本的には、コ−ドをラジアル方向に配列したプラ
イがトロイド状に延びるカ−カスと、その周囲に非伸長
性コ−ドをタイヤの赤道面に対し浅い角度で傾斜配列し
た層の複数枚を、それらのコ−ドが交差するように重ね
合わせて成る円筒状のベルト層および、これとほぼ同幅
のトレッドによって構成される。そして特に、乗用車用
ラジアルタイヤの場合は、カ−カスの補強材としてポリ
エステル、レ−ヨンなどの繊維コ−ドが使用され、また
ベルト層の補強材には、スチ−ル、アラミドで代表され
る高弾性コ−ドが好んで使用される。
2. Description of the Related Art As is widely known, a radial tire is basically a carcass in which plies having cords arranged in the radial direction extend in a toroidal shape and a non-stretchable cord around the carcass. Is formed by stacking a plurality of layers in which the tires are inclined and arranged at a shallow angle with respect to the equatorial plane of the tire so that their codes intersect, and a tread having substantially the same width as the belt layer. It In particular, in the case of radial tires for passenger cars, fiber cords such as polyester and rayon are used as the reinforcing material for the carcass, and the reinforcing material for the belt layer is typified by steel and aramid. A highly elastic cord is preferably used.

【0003】タイヤのこのような構造は、従来のバイア
ス構造と異なり、内圧を充填したとき作用する径方向の
張力はカ−カスが負担し、また周方向の張力はベルト層
が実質上一手に負担するところから、カ−カスおよびベ
ルト層が不均一に形成されているときは、その影響が顕
著にタイヤ性能に現れる。タイヤの外観上特に異常は認
められなくても、例えばベルト層につき、周上コ−ド配
列角度にばらつきがあったり、コ−ドの打ち込み密度が
ばらついていたり、またベルト層が周方向に向かって蛇
行している場合、RFV 、LFV が増大し、縦および横方向
の振動の原因になることが知られている。そのため製造
工程においてRFV 、LFV など、ユニフォミティ検査を行
い、良品を選別することが不可欠である。
Such a structure of the tire is different from the conventional bias structure in that the radial tension acting when the internal pressure is filled is borne by the carcass, and the tension in the circumferential direction is substantially taken by the belt layer. From the point of burden, when the carcass and the belt layer are formed non-uniformly, the influence thereof remarkably appears in the tire performance. Even if no abnormalities are observed in the appearance of the tire, for example, the belt layer has a variation in the circumferential code arrangement angle, the code driving density varies, and the belt layer is oriented in the circumferential direction. It is known that RFV and LFV increase when it meanders and causes longitudinal and lateral vibrations. Therefore, it is indispensable to perform uniformity inspection such as RFV and LFV in the manufacturing process and select good products.

【0004】[0004]

【発明が解決しようとする課題】一方、高速高性能乗用
車用タイヤについては、上記検査に加え、補強コ−ドの
配置状態を直接調べる必要があり、その際X 線透視によ
って行うには、補強材に金属コ−ド使用の場合を除き、
繊維コ−ド単独使用、或は繊維コ−ドの層と金属コ−ド
層の併用構造においては、繊維コ−ドがX 線を透過する
ため検査を行うことができない。本発明は上記問題に鑑
みなされたもので、繊維コ−ドを補強材として使用し
た、非破壊検査が容易なラジアルタイヤを提供すること
を目的とする。
On the other hand, for high-speed and high-performance passenger car tires, in addition to the above inspection, it is necessary to directly examine the arrangement state of the reinforcing cords. Except when using a metal cord for the material,
In the case of using the fiber cord alone or in a structure in which the fiber cord layer and the metal cord layer are used in combination, the fiber cord transmits X-rays, and therefore the inspection cannot be performed. The present invention has been made in view of the above problems, and an object of the present invention is to provide a radial tire that uses a fiber cord as a reinforcing material and that can be easily subjected to nondestructive inspection.

【0005】[0005]

【課題を解決するための手段】本発明は、トロイド状に
延びる繊維コ−ドラジアルカ−カスのクラウン部外周上
に、非伸長性ベルト層およびトレッドを順次備え、上記
ベルト層に高弾性繊維コ−ドを中央赤道面に対し浅く傾
斜配列した少なくとも1 枚の層を含むタイヤにして、上
記カ−カスとベルト層における繊維コ−ド層のうちの少
なく一方に、金属フィラメントの1 本または少数本を加
えた混合繊維コ−ドを、上記繊維コ−ドの少なくとも一
部に用いたことを特徴とする空気入りラジアルタイヤで
ある。
According to the present invention, a non-stretchable belt layer and a tread are sequentially provided on the outer circumference of a crown portion of a fiber cord-radia arcus extending in a toroidal shape, and the belt layer has a high elastic fiber core. A tire containing at least one layer in which the cords are arranged in a shallow inclination with respect to the central equatorial plane, and at least one of the fiber cord layers in the carcass and the belt layer is provided with one or a few metal filaments. The pneumatic radial tire is characterized in that the mixed fiber cord to which is added is used for at least a part of the above fiber cord.

【0006】[0006]

【作用】本発明におけるラジアルタイヤは、カ−カスと
ベルト層に含まれる繊維コ−ド層のうちの少なく一方
に、金属フィラメントの1 本または少数本を加えた混合
繊維コ−ドを、上記繊維コ−ドの少なくとも一部に用い
ており、例えば、繊維コ−ド層の配列コ−ドの1 本置
き、または複数本置きに上記混合繊維コ−ドを使用した
り、繊維コ−ド層全体に混合繊維コ−ドを使用すること
によって、X 線など放射線検査が行えるため、高速高性
能乗用車用タイヤにとって、振動乗り心地性に対し有利
な軽量化のための、特にベルト層補強材における金属コ
−ドよりアラミドなど繊維コ−ドへの転換が可能とな
る。
In the radial tire of the present invention, a mixed fiber cord obtained by adding one or a small number of metal filaments to at least one of the fiber cord layers contained in the carcass and the belt layer is used. It is used for at least a part of the fiber code.For example, the above mixed fiber code is used for every one or a plurality of array codes of the fiber code layer, or the fiber code is used. By using a mixed fiber cord for the entire layer, radiation inspection such as X-ray can be performed, so for a high-speed and high-performance passenger car tire, it is advantageous to reduce the weight which is advantageous for vibration riding comfort, especially for the belt layer reinforcement It is possible to convert the metal cord in the above into a fiber cord such as aramid.

【0007】[0007]

【実施例】以下図面に基づき説明する。図1は本発明に
おける一実施例を示すタイヤの破断平面図、図2は混合
繊維コ−ドの一例をを示す斜視図である。本発明におい
てタイヤ1 は、トロイド状に延びる繊維コ−ドT のラジ
アルカ−カス2 におけるクラウン部外周上に、非伸長性
ベルト層3 およびトレッド4 を順次備え、上記ベルト層
3 に高弾性繊維コ−ドTHを中央赤道面O に対し浅く傾斜
配列した少なくとも1 枚の層を含み、カ−カス2 とベル
ト層3 における繊維コ−ド層のうちの少なく一方に、金
属フィラメント5 の1 本または少数本を加えた混合繊維
コ−ド6 を、上記繊維コ−ドの少なくとも一部に用いて
成る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. 1 is a cutaway plan view of a tire showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of a mixed fiber cord. In the present invention, the tire 1 is provided with a non-extensible belt layer 3 and a tread 4 in that order on the outer circumference of the crown portion of the radial cord 2 of the fiber cord T extending in a toroidal shape.
3 includes at least one layer in which high-elasticity fiber cord T H is arranged in a shallow inclination with respect to the central equatorial plane O, and in at least one of the fiber cord layers in the carcass 2 and the belt layer 3, A mixed fiber cord 6 to which one or a small number of metal filaments 5 are added is used for at least a part of the above fiber cord.

【0008】図1は235/40ZR18サイズの超扁平ラジアル
タイヤの例で、カ−カス2 は、繊維コ−ドT として1840
d/2 のレ−ヨンコ−ドを赤道面O と直交する向きに配列
したプライの2 枚から成り、ベルト層3 は、撚り構造が
(1×5)×0.23のスチ−ルコ−ドS を、赤道面O に対し24
°で左上りに配列した第1層31と、混合繊維コ−ド6を
同角度で右上りに配列した層32の2 枚と、図示を省略し
ているが、更にその上に1260d/2 ナイロンコ−ドを10本
並べてゴム引きしたストリップの周方向螺旋巻きによっ
て、幅いっぱいに形成したキャップ層の2 枚によって構
成し、その上に溝および陸部についての図示を省略した
トレッド4 を配置した構造である。
FIG. 1 shows an example of a 235 / 40ZR18 size ultra-flat radial tire. The carcass 2 has a fiber cord T of 1840.
The belt layer 3 consists of two plies with d / 2 rayon cords arranged in a direction orthogonal to the equatorial plane O.
A steel cord S of (1 × 5) × 0.23 is attached to the equatorial plane O at 24
A first layer 3 1 which is arranged to the left up in °, mixed fiber co - and two layers 3 2 a de 6 arranged in the right upward at the same angle, although not shown, further 1260d thereon / 2 Ten nylon cords are arranged side by side to form a rubber strip that is spirally wound in the circumferential direction, and is composed of two cap layers that are formed over the entire width. The structure is arranged.

【0009】この実施例における混合繊維コ−ド6 は、
1670d/2 アラミドコ−ドを構成する繊維フィラメント束
7 の一方に、直径0.15mmのスチ−ルフィラメント5 を撚
り込んだもので、図1に示す例では、層32の高弾性コ−
ドTHの総てにこの混合繊維コ−ド6 を使用している。
The mixed fiber cord 6 in this embodiment is
1670d / 2 Fiber filament bundles forming aramid cord
While the 7, steel diameter 0.15 mm - those elaborate twisted Le filament 5, in the example shown in FIG. 1, layer 3 2 of the high modulus co -
The mixed fiber co to all de T H - using de 6.

【0010】混合繊維コ−ド6 は、コ−ド層32の補強コ
−ドの総てに使用しなくても、通常のアラミドコ−ドと
1 本置きに交互配列したり、アラミドコ−ドの複数本置
きに配列して使用することができる。混合繊維コ−ド6
は、同様の配列によりベルト第1 層31に対し適用した
り、ベルト第1 、第2 層31、32の両方に適用することが
でき、更にはカ−カス2 を含め、繊維コ−ド補強層の総
てに適用することもできる。また、カ−カス2 に限って
適用することも可能である。
[0010] mixed fiber co - de 6 co - even without using the all de usual Aramidoko - - reinforcing co de layer 3 2 de and
They can be used by alternately arranging them every other line or by arranging every two or more aramid cords. Mixed fiber cord 6
Is, apply to the belt first layer 3 1 in the same sequence, first, can be applied to both of the second layer 3 1, 3 2 belt, even months - including Kas 2, fiber cord -It can also be applied to all of the reinforcement layers. It is also possible to apply it only to the carcass 2.

【0011】図3は、混合繊維コ−ドの別の例を示す側
面図である。この実施例の特徴は、混合繊維コ−ド6'が
アラミドのような繊維フィラメントの束7'の周囲に金属
フィラメント5'を螺旋状に巻つけた点にある。このよう
にして成るコ−ド6'を目的に応じ、図2に示す混合繊維
コ−ド6 に代え、また同コ−ド6 と併用し使用すること
ができる。混合繊維コ−ドに使用する金属フィラメント
は、上記実施例において述べた1本に限らず、目的を損
なわない限り複数本(但し少数本)使用することができ
る。
FIG. 3 is a side view showing another example of the mixed fiber cord. A feature of this embodiment is that the mixed fiber cord 6'has a metal filament 5'helixed around a bundle 7'of fiber filaments such as aramid. Depending on the purpose, the cord 6'formed in this way can be used in place of the mixed fiber cord 6 shown in FIG. 2 or in combination with the cord 6. The number of metal filaments used in the mixed fiber cord is not limited to one described in the above embodiment, and a plurality of metal filaments (however, a small number) can be used as long as the purpose is not impaired.

【0012】[0012]

【発明の効果】本発明に成るタイヤの効果を確かめるた
め、図1、2に沿って上に述べた実施例のタイヤと、図
1に示すベルト層の第2 層32の補強コ−ドとして、第1
層と同じスチ−ルコ−ドを全体に使用した点以外実施例
のタイヤと同一の比較例のタイヤと共に、ベルト層のX
線検査を行いユニフォミチに優れたものを選別した。
In order to confirm the effect of the tire according to the present invention, the tire of the embodiment described above with reference to FIGS. 1 and 2 and the reinforcing cord of the second layer 32 of the belt layer shown in FIG. As the first
Along with the tire of the comparative example which is the same as the tire of the example except that the same steel cord as the layer was used throughout, the belt layer X
We conducted line inspection and selected those with excellent uniformity.

【0013】X 線検査において実施例のタイヤは、ベル
ト第2 層32が僅か直径0.15mmのスチ−ルフィラメント混
撚りコ−ドによって形成したにも拘らず、鮮明な混合繊
維コ−ドの配列状態を確認することができ、タイヤの選
別に当たって、比較例のタイヤと同様何ら問題は生じな
かった。
[0013] tires of Examples in the X-ray examination, belt second layer 3 2 is slightly diameter 0.15mm steel - le filament混撚Rico - despite formed by de, clear mixed fiber co - de of It was possible to confirm the arrangement state, and when selecting the tires, no problems occurred as with the tires of the comparative examples.

【0014】選別したテストタイヤは重量測定を行い、
次いで18×8.5Jアルミ製リムに組み、2.5 Kgf/Cm2 の内
圧に調整した後、目地段差および道路補修跡等を要所に
設けたアスファルト舗装の特設路において、実車による
高速(150 〜250Km/H )振動乗り心地テストを行い、ド
ライバ−のフィ−リングによる比較評価を行った。テス
ト結果は表1に示す。
The selected test tires are weighed,
Next, after assembling it to an 18 x 8.5J aluminum rim and adjusting the internal pressure to 2.5 Kgf / Cm 2 , on a special road with asphalt pavement where joint steps and road repair marks etc. were provided in key points, high speed (150-250 Km) / H) A vibration riding comfort test was conducted, and a comparative evaluation was performed using the driver's feeling. The test results are shown in Table 1.

【0015】[0015]

【表1】 [Table 1]

【0016】このように、繊維コ−ドを補強材とするラ
ジアルカ−カスと、高弾性繊維コ−ドを補強材とする層
の少なくとも1 枚を含むベルト層を備えたタイヤにおい
て、上記カ−カスとベルト層における繊維コ−ド層のう
ちの少なく一方に、金属フィラメントの1 本または少数
本を加えた混合繊維コ−ドを、上記繊維コ−ドの少なく
とも一部に用いることにより、放射線検査が可能とな
り、また重量軽減による振動乗り心地特性の向上に好結
果がもたらされるのである。
As described above, in a tire provided with a belt layer including at least one layer of a radial arcus having a fiber cord as a reinforcing material and a layer having a high elastic fiber cord as a reinforcing material, By using a mixed fiber cord obtained by adding one or a small number of metal filaments to at least one of the fiber cord layers in the dust layer and the belt layer as at least a part of the fiber cord, Inspection is possible, and good results are achieved in improving the vibration riding comfort characteristics by reducing the weight.

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

【図1】本発明における一実施例を示すタイヤの破断平
面図。
FIG. 1 is a cutaway plan view of a tire showing an embodiment of the present invention.

【図2】混合繊維コ−ドの一例をを示す斜視図。FIG. 2 is a perspective view showing an example of a mixed fiber cord.

【図3】混合繊維コ−ドの別の例を示す側面図。FIG. 3 is a side view showing another example of the mixed fiber cord.

【符号の説明】[Explanation of symbols]

1 タイヤ 2 カ−カス 3 ベルト層 4 トレッド 5 金属フィラメント 6 混合繊維コ−ド 7 ベルト層外表面 O 赤道面 T 繊維コ−ド TH 高弾性コ−ド1 Tire 2 Carcass 3 Belt layer 4 Tread 5 Metal filament 6 Mixed fiber code 7 Belt layer outer surface O Equatorial surface T Fiber code T H High elasticity code

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 トロイド状に延びる繊維コ−ドラジアル
カ−カスのクラウン部外周上に、非伸長性ベルト層およ
びトレッドを順次備え、上記ベルト層に高弾性繊維コ−
ドを中央赤道面に対し浅く傾斜配列した少なくとも1 枚
の層を含むタイヤにして、上記カ−カスとベルト層にお
ける繊維コ−ド層のうちの少なく一方に、金属フィラメ
ントの1 本または少数本を加えた混合繊維コ−ドを、上
記繊維コ−ドの少なくとも一部に用いたことを特徴とす
る空気入りラジアルタイヤ。
1. A non-stretchable belt layer and a tread are sequentially provided on the outer periphery of the crown portion of a fiber cord radial base which extends in a toroidal shape, and the high elastic fiber cord is provided on the belt layer.
A tire containing at least one layer in which the cords are arranged in a shallow inclination with respect to the central equatorial plane, and at least one of the fiber cord layers in the carcass and the belt layer is provided with one or a few metal filaments. A pneumatic radial tire characterized by using a mixed fiber cord to which is added at least a part of the above fiber cord.
JP7066463A 1995-03-24 1995-03-24 Pneumatic radial tire Pending JPH08258507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7066463A JPH08258507A (en) 1995-03-24 1995-03-24 Pneumatic radial tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7066463A JPH08258507A (en) 1995-03-24 1995-03-24 Pneumatic radial tire

Publications (1)

Publication Number Publication Date
JPH08258507A true JPH08258507A (en) 1996-10-08

Family

ID=13316506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7066463A Pending JPH08258507A (en) 1995-03-24 1995-03-24 Pneumatic radial tire

Country Status (1)

Country Link
JP (1) JPH08258507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999017920A1 (en) * 1997-10-03 1999-04-15 Bridgestone Corporation Method and apparatus for forming tire reinforcing layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999017920A1 (en) * 1997-10-03 1999-04-15 Bridgestone Corporation Method and apparatus for forming tire reinforcing layer

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