JPH02106409A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH02106409A JPH02106409A JP63258882A JP25888288A JPH02106409A JP H02106409 A JPH02106409 A JP H02106409A JP 63258882 A JP63258882 A JP 63258882A JP 25888288 A JP25888288 A JP 25888288A JP H02106409 A JPH02106409 A JP H02106409A
- Authority
- JP
- Japan
- Prior art keywords
- cord
- layer
- belt
- layers
- wound
- 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
- 239000000835 fiber Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 18
- 229920002302 Nylon 6,6 Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- VUTBELPREDJDDH-UHFFFAOYSA-N 4-amino-5-hydroxymethyl-2-methylpyrimidine Chemical compound CC1=NC=C(CO)C(N)=N1 VUTBELPREDJDDH-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
空気入りタイヤそれもとくに航空機の離、着陸走行及び
タキシングを司る車輪に用いるもののように、極く高い
荷重を負担するため高圧の空気光てん下の高速走行に供
せられる場合、いわゆるスタンディングウェーブの抑制
がとくに重要であり、このような要請を有利に満たすこ
とができる空気入りタイヤの開発研究の成果について以
下に述べる。[Detailed Description of the Invention] (Industrial Application Field) Pneumatic tires, especially those used in aircraft wheels for take-off, landing, and taxiing, are used to carry high-pressure air tires to bear extremely high loads. Suppression of so-called standing waves is particularly important when used for low-speed high-speed driving, and the results of research and development of pneumatic tires that can advantageously meet such requirements will be described below.
(従来の技術)
上に例示の使途に供しようとする空気入りタイヤは、ボ
ディ補強を司るトロイド状ラジアル構造のカーカスと、
コード斜布の交差多重積層でもってカーカスのクラウン
のまわりを取囲み、トレッド補強に役立つベルトとをそ
なえることを根幹とするが、スタンディングウェーブの
抑制には、多重積層になるベルトのうちの少なくとも1
層の周囲でなるべくその円周に沿うコードの密接巻回(
タイヤの赤道面に対し0°に近いコード角)Nをベルト
の層中に含むものとすることがのぞまれる。(Prior Art) The pneumatic tire to be used for the above example has a carcass with a toroidal radial structure that serves as body reinforcement,
The core of the method is to surround the crown of the carcass with cross-layered multiple layers of diagonal cord cloth, and to provide a belt that serves to reinforce the tread.
Close winding of the cord around the layer as much as possible along its circumference (
It is desired that the belt layer contains a cord angle (N) close to 0° with respect to the equatorial plane of the tire.
この密接巻回層の造成には、すだれ織り布よりなるコー
ドストリップを、巻回層の周長に合わせ切断し、その切
断端にて継目接合を行うことが知られているが、接合継
目にて必要な強力を得ることが困難で耐圧性能も充分で
ない。It is known that in order to create this closely wound layer, a cord strip made of blind weave cloth is cut to match the circumference of the wound layer, and the cut ends are seamed. It is difficult to obtain the necessary strength, and the pressure resistance is not sufficient.
これに対し1本のゴム被覆コードで密着らせんを構成す
るつる巻き線にて巻回層を造成する手法によれば耐圧は
もちろん耐久性にも問題はないが巻回回数が嵩むので作
業性に難があってコストにもひびく。On the other hand, if the winding layer is created using a helical wire that forms a tight spiral using a single rubber-coated cord, there is no problem with pressure resistance or durability, but the number of windings increases, which impairs workability. There are difficulties and costs are affected.
そこで複数本のコードを横並べとしてゴム被覆を施し平
紐状として、いわゆる多重つる巻き線の巻回層を造成す
るようにすれば作業性の改善が著しい反面、つる巻きの
始、終端における剛性段差のため、故障が多発するので
実用に適わない。Therefore, if multiple cords are lined up horizontally and coated with rubber to form a flat string shape to create a so-called multi-helix winding layer, the workability will be significantly improved. Therefore, failures occur frequently, so it is not suitable for practical use.
(発明が解決しようとする課題)
上記の多重つる巻き線方式巻回層の造成における適切な
端末処理により、巻回層の始、終端に従来不可避とされ
た剛性段差による弊害を有利に克服した空気入りタイヤ
を提供することがこの発明の目的である。(Problems to be Solved by the Invention) By applying appropriate terminal treatment in the creation of the above-mentioned multi-helix winding layer, the disadvantages of rigidity steps that were conventionally considered unavoidable at the beginning and end of the winding layer can be overcome advantageously. It is an object of this invention to provide a pneumatic tire.
(課題を解決するための手段)
この発明は、ボディ補強を司るトロイド状ラジアル構造
のカーカスと、コード斜布の交差多重積層でもってカー
カスのクラウンのまわりを取囲むベルトとをそなえ、多
重積層になるベルトはそのうちの少なくとも1層の周囲
に巻回した密接つる巻きをなすコード束の層を含み、そ
のコード束は、つる巻きの始端と終端にてそれぞれ少な
くとも50論のステップを隔てる3本以下の組からなる
複数の小束を一括して平らに引揃えたリボンよりなるこ
とを特徴とする空気入りタイヤであり、ここにコード束
が熱収縮性有機繊維コードの数本にゴム被覆したリボン
、またコード束が2本以下の組からなる2又は3組の小
束よりなることがより有利である。(Means for Solving the Problems) The present invention includes a carcass with a toroidal radial structure for reinforcing the body, and a belt that surrounds the crown of the carcass with intersecting multiple laminations of diagonal cords. The belt comprises a layer of closely wound cord bundles wound around at least one of the layers, the cord bundles having no more than three cord bundles separated by at least 50 steps at the start and end of the helix. A pneumatic tire is a pneumatic tire consisting of a ribbon made of a plurality of small bundles of ribbons arranged flat together, and the cord bundle is a ribbon made of several heat-shrinkable organic fiber cords coated with rubber. It is also more advantageous for the cord bundle to consist of two or three sub-bundles of no more than two cords.
さて第1図にこの発明に従う空気入りラジアルタイヤの
断面を示し、図中1はカーカス、2はベルト、3はトレ
ッド、4はビードコアである。Now, FIG. 1 shows a cross section of a pneumatic radial tire according to the present invention, in which 1 is a carcass, 2 is a belt, 3 is a tread, and 4 is a bead core.
カーカス1は航空機用タイヤの使途にも適合するアップ
ダウン方式にすることが好ましく、1aはターンアップ
プライ、1bはダウンブライをあられし、何れもナイロ
ン66コード(1890d/3)のような有機繊維コー
ドの如きを用いることができる。The carcass 1 is preferably an up-down type suitable for use as an aircraft tire, with 1a being a turn-up ply and 1b being a down-ply, both of which are made of organic fibers such as nylon 66 cord (1890d/3). You can use something like code.
ベルト2はこの例で2組みのフォールドJii2aと、
2枚の切離し層2bを順次に重ね、さらに各フォールド
層2aの内部にもやはり2枚の切離し層2cを包蔵し、
さらにフォールドN2aの間に追加的な巻回層5を介在
させた積層になる事例を示し、この場合にフォールド層
2aは、ベルトの幅方向の突合わせ継目Jを両側の折返
し片6.6′の各端末でこれらの間にわたる中継部片7
との間に含む。なお切離し層2cについてベルトの幅方
向に好ましくは三分割となるような、突合わせ継目Jを
有するものが好ましい。In this example, belt 2 has two sets of fold Jii2a,
Two separation layers 2b are stacked one after another, and furthermore, two separation layers 2c are also included inside each fold layer 2a,
Furthermore, a case is shown in which the fold layer 2a is laminated with an additional winding layer 5 interposed between the folds N2a. A relay piece 7 extending between these at each terminal of
Included between. It is preferable that the separation layer 2c has a butt seam J that preferably divides the belt into three parts in the width direction of the belt.
ベルト2の積層に供される各層についてもナイロン66
コード(1890d/3)のような熱収縮性有機繊維コ
ードを補強素子に用いて、慣例に従うゴム被覆を施した
コード斜布の交差多重積層とするが、追加の巻回N5に
ついては、その補強素子が数本の上記コードを平らに引
揃えた束状をなし、これにゴム被覆を施したリボン又は
平紐状にし、と(にこの例ではカーカスlの直上に位置
する下層のフォールドW2aのまわりでつる巻きらせん
状に巻きつけてなる。Nylon 66 is also used for each layer used in the lamination of the belt 2.
A heat-shrinkable organic fiber cord such as Cord (1890d/3) is used as a reinforcing element, and cross-layered multiple layers of cord cloth coated with rubber according to the customary method are used. The element is formed into a bundle of several of the above-mentioned cords arranged flat, and is made into a rubber-coated ribbon or flat string (in this example, around the lower fold W2a located directly above the carcass L). It is wound into a spiral shape.
突合わせ継目Jのおのおのにはベルトの積層造成段階で
各継目Jに沿い配設した、上記補強素子の被覆ゴムと同
種のゴムストリップ由来の継目フィラーゴムを位置させ
るを可とする。At each butt joint J, it is possible to place a seam filler rubber derived from a rubber strip of the same type as the covering rubber of the reinforcing element, which was disposed along each joint J during the belt lamination stage.
上記のようにして多重積層になるベルト2のうちこの例
で2WJのフォールドi2a間に介在する巻回N5につ
きこの発明では、第2図に4本−まとめのコード束Bを
用いた場合を示すようにつる巻きの始端と終端にてそれ
ぞれ少なくとも50鴫のステップSを隔てておのおのが
2本宛ての組みからなる二つの小束b1. btを一括
して引揃えゴム被覆を施したリボン状のコードストリッ
プを用い密接つる巻きの形で巻きつける。FIG. 2 shows a case in which a bundle of four cords B is used for the winding N5 interposed between the folds i2a of 2WJ in this example of the belt 2 which is multi-layered as described above. Two small bundles b1., each consisting of two bundles, separated by at least 50 steps S at the beginning and end of the helix, as shown in FIG. The bt is pulled together and wrapped in a tight spiral using a ribbon-like cord strip coated with rubber.
ステップSを付する小束すの数は図示の例では2分割で
あるが3分割以上でもよく、また各小束の組みに属する
コードは1末完でも、また1本と2本ととに分かれてい
ても良く、さらにこのような小束すのい(つかを、巻き
つけの工程でまとめることによってコード束Bとして用
いることももちろん可能である。The number of small bundles to which step S is attached is divided into two in the illustrated example, but it may be divided into three or more, and the cords belonging to each set of small bundles may be 1-final, complete, or 1 and 2. It is also possible to use these small bundles as a cord bundle B by combining them in the winding process.
(作 用)
この発明において密接つる巻きをなすコード束は、数本
のコードをまとめたリボン状のコードストリップよりな
るので、巻回層を形成するための巻付は回転が少く、作
業性の面で有利であってしかもこのコード束は巻回層の
始、終端において小束に分けてステップSを付したため
、コード端の周上分散のため、局部的な剛性の象、庇部
分がなく、ベルト耐久性の面で問題となることはない。(Function) In the present invention, the tightly spirally wound cord bundle is composed of a ribbon-like cord strip made up of several cords, so the winding to form the winding layer requires less rotation and improves workability. In addition, since this cord bundle is divided into small bundles at the beginning and end of the winding layer and has a step S, the cord ends are distributed over the circumference, so there is no local rigidity or eaves area. , there is no problem in terms of belt durability.
ステップSは少なくとも50mmを隔てることが剛性の
段差をなくすために必要である。It is necessary to separate the steps S by at least 50 mm in order to eliminate a difference in rigidity.
次にコード束のコード本数は、数本つまり多くても6本
捏度以下にしないと、タイヤの赤道面に対する傾斜角が
過大となって、その巻回層によって期待するスタンディ
ングウェーブの抑制効果が不充分になるおそれがある。Next, if the number of cords in the cord bundle is not less than a few, i.e. six at most, the angle of inclination with respect to the tire's equatorial plane will become excessive, and the expected effect of suppressing standing waves due to the winding layer will not be achieved. There is a risk that it will be insufficient.
コード束のコードには熱収縮性有機繊維コードたとえば
ナイロン66の使用がのぞましく、タイヤの加硫熱によ
る収縮により、ベルト2に対する緊縮作用がスタンデン
グウエーブの抑制に寄与するからである。It is preferable to use heat-shrinkable organic fiber cords, such as nylon 66, for the cords of the cord bundle, because the contraction caused by the heat of vulcanization of the tire causes a tightening effect on the belt 2, which contributes to suppressing standing waves.
(実施例)
サイズH46X1B、OR20の航空機用空気入りラジ
アルタイヤを第1図に従い試作し、この場合巻回層5の
構成を次表の区分として、作業性及び耐久性を対比した
。(Example) Aircraft pneumatic radial tires of size H46X1B and OR20 were prototyped according to FIG. 1. In this case, the structure of the wound layer 5 was categorized as shown in the table below, and workability and durability were compared.
作業性は、端末部の処理も含めた巻回層の巻き付は作業
に要する時間によって評価し、コード束が1本でのつる
巻き線(比較例1)の場合の所要時間を100とした指
数によって示した。又耐圧性についても比較例1のベル
ト破壊圧を100とした指数により示す。Workability was evaluated based on the time required for winding the winding layer, including the treatment of the terminal part, and the time required for a single cord bundle (comparative example 1) was set as 100. Indicated by index. The pressure resistance is also expressed as an index with the belt breaking pressure of Comparative Example 1 as 100.
ベルト耐久性はドラム試験機を用い内圧200PSI、
荷重44200LBSにて速度をOMPMから225M
PMに上げたのち荷重を取り除く離陸シュミレーション
テストを50回繰り返し、さらに内圧200PSI、荷
重442200しBS、速度40MPMにて走行長さ3
500ft毎のタキシングテストを50回繰り返した上
で、タイヤを解剖しつる巻コード端末部の状態を調べた
。Belt durability was measured using a drum testing machine with an internal pressure of 200 PSI.
Speed from OMPM to 225M with load 44200LBS
The takeoff simulation test was repeated 50 times with the load raised to PM and then the load removed, and then the internal pressure was 200 PSI, the load was 442,200, the BS was set at 40 MPM, and the flight length was 3.
After repeating the taxiing test 50 times at 500ft intervals, the tire was dissected and the condition of the helical cord end was examined.
(発明の効果)
この発明は、多重積層になるベルトのうちの層を占める
巻回層の巻付けを含めたベルトの造成のための作業性に
つき、ベルト耐久性の難点を伴わない著しい増進の下に
、該ベルトによる、タイヤのスタンディングウェーブの
抑制効果を有利に高めることができる。(Effects of the Invention) The present invention significantly improves the workability for constructing a belt, including the winding of the winding layer that occupies the layers of a multi-layered belt, without causing problems in belt durability. Moreover, the effect of suppressing standing waves of the tire by the belt can be advantageously enhanced.
第1図は、この発明によるタイヤの断面図、第2図は、
密接つる巻きコード束層の模式図である。
l・・・カーカス 2・・・ベルト3・・・ト
レッド 5・・・巻回層B・・・コード束
b・・・小束S・・・ステップFIG. 1 is a sectional view of a tire according to the present invention, and FIG. 2 is a sectional view of a tire according to the present invention.
FIG. 3 is a schematic diagram of a closely spirally wound cord bundle layer. l... Carcass 2... Belt 3... Tread 5... Winding layer B... Cord bundle
b...Small bundle S...Step
Claims (1)
スと、コード斜布の交差多重積層でもってカーカスのク
ラウンのまわりを取囲むベルトとをそなえ、多重積層に
なるベルトはそのうちの少なくとも1層の周囲に巻回し
た密接つる巻きをなすコード束の層を含み、そのコード
束は、つる巻きの始端と終端にてそれぞれ少なくとも5
0mmのステップを隔てる3本以下の組からなる複数の
小束を一括して平らに引揃えたリボンよりなることを特
徴とする空気入りタイヤ。 2、コード束が熱収縮性有機繊維コードの数本にゴム被
覆したリボンである請求項1に記載した空気入りタイヤ
。 3、コード束が2本以下の組からなる2又は3組の小束
よりなる請求項1又は2に記載した空気入りタイヤ。[Claims] 1. A carcass with a toroidal radial structure for reinforcing the body, and a belt that surrounds the crown of the carcass with cross-layered diagonal cords. a layer of a cord bundle in a close helix wound around at least one layer, the cord bundle having at least
A pneumatic tire characterized by being made of a ribbon made by flattening a plurality of small bundles of three or less ribbons separated by steps of 0 mm. 2. The pneumatic tire according to claim 1, wherein the cord bundle is a ribbon made of several heat-shrinkable organic fiber cords coated with rubber. 3. The pneumatic tire according to claim 1 or 2, wherein the cord bundle consists of two or three small bundles each consisting of two or less cord bundles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63258882A JPH02106409A (en) | 1988-10-14 | 1988-10-14 | Pneumatic tire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63258882A JPH02106409A (en) | 1988-10-14 | 1988-10-14 | Pneumatic tire |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02106409A true JPH02106409A (en) | 1990-04-18 |
Family
ID=17326341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63258882A Pending JPH02106409A (en) | 1988-10-14 | 1988-10-14 | Pneumatic tire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02106409A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04365604A (en) * | 1990-08-24 | 1992-12-17 | Sumitomo Rubber Ind Ltd | Radial tire |
JPH04365602A (en) * | 1990-08-10 | 1992-12-17 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
JPH05201203A (en) * | 1990-06-11 | 1993-08-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
WO2013018178A1 (en) * | 2011-07-29 | 2013-02-07 | 横浜ゴム株式会社 | Pneumatic tire |
US20140332130A1 (en) * | 2013-05-10 | 2014-11-13 | Bridgestone Corporation | Tire and method of producing the same |
WO2020004063A1 (en) * | 2018-06-25 | 2020-01-02 | 株式会社ブリヂストン | Tire |
-
1988
- 1988-10-14 JP JP63258882A patent/JPH02106409A/en active Pending
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05201203A (en) * | 1990-06-11 | 1993-08-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
JPH04365602A (en) * | 1990-08-10 | 1992-12-17 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
JPH04365604A (en) * | 1990-08-24 | 1992-12-17 | Sumitomo Rubber Ind Ltd | Radial tire |
US9505268B2 (en) | 2011-07-29 | 2016-11-29 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
WO2013018178A1 (en) * | 2011-07-29 | 2013-02-07 | 横浜ゴム株式会社 | Pneumatic tire |
KR101256362B1 (en) * | 2011-07-29 | 2013-04-25 | 요코하마 고무 가부시키가이샤 | Pneumatic tire |
CN103717410A (en) * | 2011-07-29 | 2014-04-09 | 横滨橡胶株式会社 | Pneumatic tire |
US20140332130A1 (en) * | 2013-05-10 | 2014-11-13 | Bridgestone Corporation | Tire and method of producing the same |
US9321230B2 (en) * | 2013-05-10 | 2016-04-26 | Bridgestone Corporation | Tire having circumferential reinforcement layer with at least two spirally wound strips |
US9931800B2 (en) | 2013-05-10 | 2018-04-03 | Bridgestone Corporation | Method of producing tire having circumferential reinforcement layer with at least two spirally wound strips |
WO2020004063A1 (en) * | 2018-06-25 | 2020-01-02 | 株式会社ブリヂストン | Tire |
JP2020001468A (en) * | 2018-06-25 | 2020-01-09 | 株式会社ブリヂストン | tire |
CN112313087A (en) * | 2018-06-25 | 2021-02-02 | 株式会社普利司通 | Tyre for vehicle wheels |
US20210260924A1 (en) * | 2018-06-25 | 2021-08-26 | Bridgestone Corporation | Tire |
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