JPH0228003A - Pneumatic tire and its manufacture - Google Patents
Pneumatic tire and its manufactureInfo
- Publication number
- JPH0228003A JPH0228003A JP63177094A JP17709488A JPH0228003A JP H0228003 A JPH0228003 A JP H0228003A JP 63177094 A JP63177094 A JP 63177094A JP 17709488 A JP17709488 A JP 17709488A JP H0228003 A JPH0228003 A JP H0228003A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- tire
- rubber
- belt
- reinforcing
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
- B60C9/1835—Rubber strips or cushions at the belt edges
- B60C2009/1842—Width or thickness of the strips or cushions
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、タイヤのベルト層外周端部が繊維コード補強
層で被覆、補強された、タイヤのユニフォミティー並び
に高速耐久性を改良した空気入りタイヤに関する。Detailed Description of the Invention [Field of Industrial Application] The present invention provides a pneumatic tire with improved uniformity and high-speed durability, in which the outer peripheral edge of the belt layer of the tire is covered and reinforced with a fiber cord reinforcing layer. Regarding tires.
近年、車の高速性能が向上し、タイヤに対しても高速走
行時の安全性に関する要求がますます高くなっており、
これに対応してベルト層の高速走行時の耐久性を向上さ
せるため、該ベルト層の外周にゴムで被覆された有機繊
維コードからなる補強層で補強したタイヤが多（使用さ
れている。In recent years, the high-speed performance of cars has improved, and the demands on tires for safety during high-speed driving have become higher and higher.
In order to improve the durability of the belt layer during high-speed running, many tires are used in which the outer periphery of the belt layer is reinforced with a reinforcing layer made of organic fiber cords coated with rubber.
この補強層の配置については、タイヤ同上に接合部（ラ
ンプ部）を配置することによるユニフォミティーの悪化
と耐久性の低減を避けるため、補強層を構成するコード
帯をタイヤ周上に螺旋状に巻回し、タイヤ周上に補強層
の接合部分を極力配置しない方法が提案されている（た
とえば、実開昭６１−１５６０４号、特開昭６１−６０
３０３号、特開昭６２−２５１２０３号各公報）０しか
るに、これらのコード帯を巻回する方法における問題点
としては、コード帯をあまりに広い幅にすると、タイヤ
周上に補強層を巻回する際の周方向に対する巻回角度が
大きくなるためベルトの補強効果が低下することとなり
、耐久性を悪化する要因になること、さらには特開昭６
２−２５１２０３号公報に見られるような二重の補強構
造を採用する場合には、補強層の折返し部分のコードが
乱れることにより、ユニフォミティーと耐久性の悪化が
避けられないことが挙げられる。これを解消するために
、巻回するコード帯の幅を狭くすること、特にコード−
本からなる帯状体をタイヤ周方向に巻回することが試み
られてきた。ところがこのような狭幅のコード帯を巻回
する方法ではコードの巻回角度が略タイヤ周方向に平行
になるため、タイヤ成形時にベルト端部にほぼ沿って配
置されたベルト端部付近の段差の存在に起因して、コー
ドがずれ落ち、コードの乱れが生じることになる、すな
わち、このコード乱れがユニフォミティーと耐久性を著
しく阻害する要因となっていた。Regarding the arrangement of this reinforcing layer, in order to avoid deterioration of uniformity and reduction in durability due to placing the joint part (ramp part) on the same top of the tire, the cord band that makes up the reinforcing layer is arranged in a spiral shape around the tire circumference. A method has been proposed in which the joint portion of the reinforcing layer is not arranged on the circumference of the tire as much as possible (for example, Japanese Utility Model Application Publication No. 15604/1983, Japanese Patent Application Publication No. 61-60
(No. 303, Japanese Unexamined Patent Publication No. 62-251203) 0 However, the problem with these methods of winding the cord band is that if the cord band is made too wide, the reinforcing layer will be wound around the circumference of the tire. As the winding angle with respect to the circumferential direction increases, the reinforcing effect of the belt decreases, which is a factor that deteriorates durability.
In the case of employing a double reinforcement structure as seen in Japanese Patent No. 2-251203, the cords at the folded portion of the reinforcing layer become disordered, which inevitably leads to deterioration of uniformity and durability. In order to solve this problem, it is necessary to narrow the width of the cord band to be wound.
Attempts have been made to wrap a strip of books in the circumferential direction of a tire. However, in this method of winding a narrow cord band, the winding angle of the cord is approximately parallel to the circumferential direction of the tire. Due to the presence of the cord, the cord slips down and the cord becomes disordered. In other words, this cord disorder is a factor that significantly impedes uniformity and durability.
本発明の目的は、上記ベルト層の段差に起因する補強層
コードの乱れを防止し、タイヤのユニフォミティー及び
高速耐久性を向上させた空気入りタイヤおよびその製造
方法を提供するにある。An object of the present invention is to provide a pneumatic tire and a method for manufacturing the same, which prevent the reinforcing layer cord from being disturbed due to the step difference in the belt layer and improve the uniformity and high-speed durability of the tire.
本発明の空気入りタイヤは、ベルト層の外周端部を覆う
補強層を有し、該補強層が該補強層を構成するコードの
１層数本を単位としてタイヤ周方向に連続して巻回され
たタイヤであって、前記ベルト層の端部と前記補強層と
の間に、該ベルト層または補強層を被覆するゴムとは別
のゴム充填層を介在させたことを特徴とする。The pneumatic tire of the present invention has a reinforcing layer that covers the outer peripheral end of the belt layer, and the reinforcing layer is continuously wound in the tire circumferential direction in units of several layers of cords constituting the reinforcing layer. The tire is characterized in that a rubber filling layer different from the rubber covering the belt layer or the reinforcing layer is interposed between the end of the belt layer and the reinforcing layer.
以下、図面により本発明タイヤおよびその製造方法につ
き具体的に説明する。Hereinafter, the tire of the present invention and its manufacturing method will be specifically explained with reference to the drawings.
第１図は、本発明の１実施例タイヤの成形後のベルト部
構造を示す。ここで、２層のベルト層２．２°端部のエ
ッヂ部には、このエツジ部を充填するゴム充填層として
シート状ゴム層４が配置され、該エッヂ部を被覆してい
る。そして、このシート状ゴム層４の上にゴムで被覆さ
れた補強コード５がタイヤ周方向に沿って巻回され、前
記エッヂ部を補強している。本発明においては、上記ベ
ルト層２．２“端部のエッヂ部にシート状ゴム層４が配
置され、該エッヂ部に急激な段差がないので、該エッヂ
部に巻回される補強コード５が軟らかい未加硫のシート
状ゴム層４の外周面に沿って、並列に巻き付けられるの
で、エンド乱れを生ずることがなく、均一に巻回するこ
とができるとともに、直接ベル）１ｉ！２． ２°に接
触しないため、加硫時におけるベルト層の変形の影響を
受は難くなる。また、副次的効果として、補強コード５
がベルト層に直接接することがないから、たとえばベル
ト層がスチールコードからなる場合であっても、走行中
のタイヤの補強コードがベルト層により損傷を受ける危
険がないため、エッヂ部の補強効果を大きくすることが
できる。FIG. 1 shows the structure of a belt portion of a tire according to an embodiment of the present invention after molding. Here, a sheet-like rubber layer 4 is disposed at the edge portion of the 2.2° end portion of the two belt layers as a rubber filling layer to fill the edge portion, and covers the edge portion. A reinforcing cord 5 coated with rubber is wound on the sheet-like rubber layer 4 along the circumferential direction of the tire to reinforce the edge portion. In the present invention, the sheet-like rubber layer 4 is arranged at the edge of the end of the belt layer 2.2'', and since there is no sharp step at the edge, the reinforcing cord 5 wound around the edge Since it is wound in parallel along the outer circumferential surface of the soft unvulcanized sheet rubber layer 4, it can be wound evenly without causing end disturbance, and it can be wound directly at 1i!2.2°. Since the reinforcing cord 5
Since the tire does not come into direct contact with the belt layer, for example, even if the belt layer is made of steel cord, there is no risk of the reinforcing cord of the tire being damaged by the belt layer while the tire is running. Can be made larger.
ここで、上記エツジ部に配置されるゴム充填層は、第１
図に示すようにシート状ゴム層に限られるものではなく
、エッヂ部の段差を充填するゴム層であればよい。Here, the rubber filling layer disposed at the edge portion is the first
The rubber layer is not limited to a sheet-like rubber layer as shown in the figure, but may be any rubber layer that fills the step at the edge.
第２図は、本発明の他の実施例タイヤの成形後のベルト
部構造を示し、ゴム充填層として断面三角形状のゴム層
４°をベルトエツジ部に配置した場合を示している。FIG. 2 shows the structure of the belt portion after molding of a tire according to another embodiment of the present invention, in which a rubber layer having a triangular cross section of 4° is disposed as a rubber filling layer at the belt edge portion.
これらベルト層エッヂ部を充填するゴム層の上に巻回さ
れる補強コード５は、１本以上、３本以下のコードを単
位とした帯状体であることが好ましい。補強コードの本
数が３本を超えると、このコード帯のタイヤ周方向に対
する巻回角度を大きくすることとなり、補強効果上好ま
しくない。したがって、タイヤ周方向に対してより平行
に巻回する上では１本が最も好ましい。It is preferable that the reinforcing cord 5 wound on the rubber layer filling the edge portion of the belt layer is a band-like body having one or more cords and three or less cords as a unit. If the number of reinforcing cords exceeds three, the winding angle of the cord band with respect to the tire circumferential direction will be increased, which is not preferable in terms of reinforcing effect. Therefore, one is most preferable for winding more parallel to the tire circumferential direction.
本発明タイヤの製造方法としては、通常採用されている
タイヤの成形方法において、ベルト層をタイヤカーカス
上に貼り付けた後、そのエッヂ部に第１図に示したよう
に未加硫のシート状ゴム層を貼り付けるか、第２図に示
したように断面三角形状の未加硫ゴム層を介在させ、し
かる後前記ベルト層の外周に補強コード帯をタイヤ周方
向に対して実質的に０６の角度になるように巻回し、次
いで加硫する。The method for manufacturing the tire of the present invention is to apply a belt layer onto a tire carcass in a commonly used tire molding method, and then apply an unvulcanized sheet-like layer to the edge portion of the belt layer as shown in FIG. Either a rubber layer is attached or an unvulcanized rubber layer with a triangular cross section is interposed as shown in FIG. The material is wound at an angle of , and then vulcanized.
上記エッヂ部に充填するゴム層の！（シート状ゴムの場
合は厚さ）は、ベルト層エッヂ部の段差を解消するに必
要な量（厚さ）であればよい。The rubber layer filled in the edge part above! (Thickness in the case of sheet-like rubber) may be any amount (thickness) necessary to eliminate the level difference at the edge portion of the belt layer.
また、補強コードとしては、ナイロン、ポリエステル繊
維或いはアラミド繊維などの有機繊維からなる通常タイ
ヤの製造に使用されているコードであればよいが、これ
らの補強コードは、ゴム被覆コード、特に前記エッヂ部
を充填するゴムと同一種類のゴムで被覆したコードであ
ることが好ましい。すなわち、充填ゴム層と補強コード
を一体化し、その補強効果ならびに耐久性を向上させる
ことができるからである。Further, the reinforcing cord may be any cord made of organic fibers such as nylon, polyester fiber, or aramid fiber, which is normally used in the manufacture of tires. Preferably, the cord is coated with the same type of rubber as the rubber used to fill the cord. That is, it is possible to integrate the filled rubber layer and the reinforcing cord, thereby improving the reinforcing effect and durability.
なお、充填ゴム層および補強コードの被覆ゴムとしては
、特に限定されるものではなく、トレッド部カーカス層
を構成するゴムの種類に応じて適宜選択すればよい。The rubber covering the filling rubber layer and the reinforcing cords is not particularly limited, and may be appropriately selected depending on the type of rubber constituting the tread carcass layer.
以下、実施例、比較例により本発明の効果を具体的に説
明する。Hereinafter, the effects of the present invention will be specifically explained using Examples and Comparative Examples.
なお、タイヤのユニフォミテイーとしては、ＪＡＳＯＣ
６０７ｒ自動車タイヤのユニフォーミティ試験法」に準
拠して、タイヤ−同上のタイヤ凹凸を測定するラジアル
ランアウト（ＲＲＯ） 、ラジアルフォースバリエーシ
ョン（ＲＰＶ）およびラテラルフォースバリエーション
（ＬＦＶ）により評価し、高速耐久性についてはＥＣＥ
３０レギュレーション高速耐久試験の延長条件で評価し
た。In addition, as for tire uniformity, JASOC
607r Automotive Tire Uniformity Test Method, tires were evaluated using radial runout (RRO), radial force variation (RPV), and lateral force variation (LFV), which measure tire unevenness as described above, to determine high-speed durability. is ECE
Evaluation was made under the extended conditions of the 30 Regulation High Speed Durability Test.
実施例、比較例
以下の仕様により、実施例タイヤと比較例タイヤを作成
し、前記各項目についてそれぞれ測定し、その結果を表
に示した。なお、ユニフオミテイーの結果については比
較例タイヤを１００とした指数表示により示した。Examples and Comparative Examples Example tires and comparative tires were prepared according to the following specifications, and each of the above items was measured, and the results are shown in the table. The uniformity results are shown as an index with the comparative tire set as 100.
ここで、実施例タイヤのベルト部の補強構造は第４図に
示す通り、補強層を８点を始点として巻き始め、矢印方
向に順次巻き−ながら、Ｅ点で巻き終わる二重構造とし
た（図中、Ｗ＝１９０ｍ１１１）。比較例タイヤは、第
４図に示すシート状ゴム層４を配置しないことを除いて
実施例タイヤと同一のベルト部補強構造とした。Here, as shown in Fig. 4, the reinforcing structure of the belt portion of the example tire was a double structure in which the reinforcing layer started winding at 8 points, wound sequentially in the direction of the arrow, and ended at point E ( In the figure, W=190m111). The comparative tire had the same belt reinforcement structure as the example tire, except that the sheet rubber layer 4 shown in FIG. 4 was not provided.
主たる仕様：
タイヤサイズ： ２２５１５０Ｒ１６９２Ｖ、補強コ
ード：ナイロン８４００／２１本、ベルト層： スチー
ルコード ２Ｎ。Main specifications: Tire size: 225150R1692V, reinforcement cord: nylon 8400/21, belt layer: steel cord 2N.
（以下、余白）
〔発明の効果〕
本発明によれば、タイヤのベルト層エッヂ部にゴム充填
層を配置し、その上に補強コード帯をタイヤ周方向に実
質的に０°の角度で巻回し、補強したので、補強コード
帯がヘルド端部よりズリ落ちたり、エンド乱れを生ずる
ことなしに、タイヤを製造することができる。したがっ
て、タイヤのユニフォミテイーが向上し、その高速耐久
性を向上させることができる。(Hereinafter, blank space) [Effects of the Invention] According to the present invention, a rubber filling layer is arranged at the edge portion of the belt layer of a tire, and a reinforcing cord band is wound thereon at an angle of substantially 0° in the tire circumferential direction. Since the reinforcing cord is rotated and reinforced, tires can be manufactured without the reinforcing cord band slipping down from the heald end or causing end disturbance. Therefore, the uniformity of the tire is improved, and its high-speed durability can be improved.
第１図および第２図はそれぞれ、本発明実施例タイヤの
成形後のベルト構造を示す一部断面図、第３図は試験タ
イヤの補強層のコード配列構造を示す説明図である。
２．２゛・・・ベルト層、４・・・シード状ゴム層、４
°・・・断面三角形状ゴム層、５・・・補強コード。FIGS. 1 and 2 are partial cross-sectional views showing the belt structure of the tire according to the invention after molding, and FIG. 3 is an explanatory view showing the cord arrangement structure of the reinforcing layer of the test tire. 2.2゛...belt layer, 4...seed rubber layer, 4
°...Rubber layer with triangular cross section, 5...Reinforcement cord.
Claims (4)
層が該補強層を構成するコードの１〜数本を単位として
タイヤ周方向に連続して巻回されたタイヤであって、前
記ベルト層の端部と前記補強層との間に、該ベルト層ま
たは補強層を被覆するゴムとは別のゴム充填層を介在さ
せたことを特徴とする空気入りタイヤ。(1) A tire that has a reinforcing layer that covers the outer peripheral end of the belt layer, and the reinforcing layer is wound continuously in the tire circumferential direction in units of one to several cords that make up the reinforcing layer. A pneumatic tire characterized in that a rubber filling layer different from the rubber covering the belt layer or the reinforcing layer is interposed between the end of the belt layer and the reinforcing layer.
載の空気入りタイヤ。(2) The pneumatic tire according to claim 1, wherein the rubber filling layer comprises a sheet-like rubber layer.
項１記載の空気入りタイヤ。(3) The pneumatic tire according to claim 1, wherein the rubber filling layer comprises a rubber layer having a triangular cross section.
し、該ベルト層の端部位置にゴム充填層を介在させ、し
かる後該補強層を構成するコードの１〜数本を単位とし
てゴム被覆した帯状体を前記ベルト層の外周にほぼタイ
ヤ周方向に巻回して形成することを特徴とする空気入り
タイヤの製造方法。(4) When arranging the reinforcing layer covering the outer circumferential end of the belt layer, a rubber filling layer is interposed at the end position of the belt layer, and then one to several cords constituting the reinforcing layer are arranged as a unit. A method for manufacturing a pneumatic tire, comprising the step of forming a rubber-coated band around the outer periphery of the belt layer substantially in the circumferential direction of the tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177094A JPH0228003A (en) | 1988-07-18 | 1988-07-18 | Pneumatic tire and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177094A JPH0228003A (en) | 1988-07-18 | 1988-07-18 | Pneumatic tire and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0228003A true JPH0228003A (en) | 1990-01-30 |
Family
ID=16025029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63177094A Pending JPH0228003A (en) | 1988-07-18 | 1988-07-18 | Pneumatic tire and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0228003A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0439104A (en) * | 1990-06-01 | 1992-02-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| WO2004089656A1 (en) * | 2003-04-04 | 2004-10-21 | The Yokohama Rubber Co. Ltd. | Pneumatic tire |
| KR100498012B1 (en) * | 1998-12-09 | 2005-10-12 | 한국타이어 주식회사 | Heavy-duty radial tires for increased durability |
| JP2011225172A (en) * | 2010-04-22 | 2011-11-10 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
-
1988
- 1988-07-18 JP JP63177094A patent/JPH0228003A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0439104A (en) * | 1990-06-01 | 1992-02-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| KR100498012B1 (en) * | 1998-12-09 | 2005-10-12 | 한국타이어 주식회사 | Heavy-duty radial tires for increased durability |
| WO2004089656A1 (en) * | 2003-04-04 | 2004-10-21 | The Yokohama Rubber Co. Ltd. | Pneumatic tire |
| US7810534B2 (en) | 2003-04-04 | 2010-10-12 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| JP2011225172A (en) * | 2010-04-22 | 2011-11-10 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
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