JP3449692B2 - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JP3449692B2 JP3449692B2 JP27056799A JP27056799A JP3449692B2 JP 3449692 B2 JP3449692 B2 JP 3449692B2 JP 27056799 A JP27056799 A JP 27056799A JP 27056799 A JP27056799 A JP 27056799A JP 3449692 B2 JP3449692 B2 JP 3449692B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- breaker belt
- cap ply
- rubber ring
- hard rubber
- 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.)
- Expired - Fee Related
Links
Landscapes
- Tires In General (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、軽量化及び安全性
に配慮を加えた空気入り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 pneumatic radial tire in which weight reduction and safety are taken into consideration.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】ブレー
カーベルトのキャッププライに関しては、例えば特開平
４−３５５１２１号公報に開示されている。この公報に
おいては、複数本の補強コードにゴムコートしたリボン
ゴムよりなるリボン状補強層が、２層のブレーカーベル
ト層の外径側において、２層のブレーカーベルト層の少
なくとも一方の側部区域にリボンゴム自身のオーバーラ
ップ状態で巻回されている。またリボン状補強層がブレ
ーカーベルトの巾全体を覆うように、かつ、巻回ピッチ
をブレーカーベルト層の中央区域で大きく側部区域で小
さくするように構成されている。2. Description of the Related Art A cap ply for a breaker belt is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-355121. In this publication, a ribbon-shaped reinforcing layer made of a ribbon rubber in which a plurality of reinforcing cords are coated with rubber is provided with a ribbon rubber itself on the outer diameter side of the two breaker belt layers in at least one side area of the two breaker belt layers. It is wound in the overlapping state. Further, the ribbon-like reinforcing layer is configured to cover the entire width of the breaker belt, and the winding pitch is made larger in the central area of the breaker belt layer and smaller in the side areas.
【０００３】一方、ビード部については、例えば特開平
１０−２３０７１４号公報（本出願人）がある。この技
術は、ビード部からショルダー部にかけて、Ｎ数ブロッ
クに分けて周方向の渦巻層を配設したものである。On the other hand, regarding the bead portion, there is, for example, Japanese Patent Application Laid-Open No. 10-230714 (the applicant). In this technique, the spiral layer in the circumferential direction is divided into N number of blocks from the bead portion to the shoulder portion.
【０００４】高速走行におけるタイヤの断面形状は、設
計の形状より接地面のラウンドが小さくなる。これは、
遠心力による結果である。特にショルダー部がトレッド
側に近接する、所謂リフティング現象となる。この現象
防止のため前記の公開技術の如く改善が重ねられている
が、タイヤの軽量化に寄与するまでには至っていない。
安全走行のための１つの条件としての素早い応答性に関
しては、前記の本出願人の技術は効果を実現している
が、タイヤの軽量化には必ずしも満足できない。The cross-sectional shape of the tire in high-speed running has a rounded contact surface smaller than the designed shape. this is,
This is the result of centrifugal force. In particular, a so-called lifting phenomenon occurs in which the shoulder portion is close to the tread side. To prevent this phenomenon, improvements have been made as in the above-mentioned publicly disclosed technology, but they have not yet contributed to weight reduction of tires.
Regarding the quick responsiveness as one condition for safe driving, the above-mentioned applicant's technique has achieved the effect, but the weight reduction of the tire is not always satisfactory.
【０００５】すなわち、排ガス規制など社会的な要請に
答えることができるタイヤとは、安全と軽量化の両方を
満足させなければならない。この発明の目的は、前記の
安全性と軽量化の双方を満足できる空気入りラジアルタ
イヤを提供することにある。That is, a tire that can meet social demands such as exhaust gas regulations must satisfy both safety and weight reduction. An object of the present invention is to provide a pneumatic radial tire that can satisfy both the safety and the weight saving.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに請求項１の発明では、単線又は撚線に波形或いはコ
イル状などの如くその長さ方向において変形加工を施し
た１本又は複数本束の線条物にゴム被覆を施し、そのゴ
ム被覆された線条体をブレーカーベルトの外径側に配置
して、その線状体を偏平三角形状断面を有する硬質ゴム
リングと併用してブレーカーベルトをサンドイッチ状に
保持するキャッププライとして複数回巻回するととも
に、ビード部の側部に、ビードコアと同心状をなす補強
層を設け、その補強層は、タイヤ径方向に間隔を開けた
複数位置に前記線状体を巻回して構成し、硬質ゴムリン
グは断面扁平三角形状をなし、その底辺がタイヤ内径側
に位置していることを要旨とする。In order to achieve the above object, in the invention of claim 1, one or a plurality of single wires or twisted wires which are deformed in the lengthwise direction such as corrugated or coiled. Apply rubber coating to the bundle of filaments, place the rubber-coated filaments on the outer diameter side of the breaker belt, and use the filaments together with a hard rubber ring having a flat triangular cross section. the breaker belt as well as multiple turns as a cap ply for holding the sandwich, on the side of the bead portion reinforcing forming the bead core and the heart-shaped
Layers, the reinforcing layers of which are spaced in the tire radial direction
The linear body is wound around a plurality of positions to form a hard rubber
The cross section has a flattened triangular shape and the bottom side is the tire inner diameter side.
The point is that it is located in .
【０００７】[0007]
【０００８】請求項２の発明では、請求項１において、
硬質ゴムリングには制振ゴムが内側に配設されているこ
とを要旨とする。 [0008] In the present invention of claim 2, Oite to claim 1,
A hard rubber ring shall be the subject matter that the damping rubber is arranged inside.
【０００９】請求項３の発明では、請求項１または２に
おいて、キャッププライはブレーカーベルトの両巾端部
に設けられていることを要旨とする。請求項４の発明で
は、請求項１または２において、キャッププライはブレ
ーカーベルトの幅全体に設けられていることを要旨とす
る。A third aspect of the present invention is characterized in that, in the first or second aspect , the cap plies are provided at both width end portions of the breaker belt. According to the invention of claim 4 , in claim 1 or 2 , the gist is that the cap ply is provided over the entire width of the breaker belt.
【００１０】[0010]
【発明の実施の形態】以下、本発明を具体化した実施形
態を図１及び図２に従って説明する。図１は空気入りラ
ジアルタイヤ１の横断面を示す図であって、カーカス層
６の外径側にブレーカーベルト層７ａ，７ｂが積層状態
で配設されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments embodying the present invention will be described below with reference to FIGS. FIG. 1 is a view showing a cross section of the pneumatic radial tire 1, in which breaker belt layers 7a and 7b are arranged on the outer diameter side of the carcass layer 6 in a laminated state.
【００１１】内径側のブレーカーベルト層７ａにおける
内径側の両巾端部に接するように、制振ゴム４を内包し
た断面が偏平三角形状の硬質ゴムリング３が配設されて
いる。硬質ゴムリング３は、その底辺側がタイヤ内径側
に位置している。この硬質ゴムリング３と協力してブレ
ーカーベルト層７ａ，７ｂを保持するようにブレーカー
ベルト層７ａの両巾端部外径側に一対のキャッププライ
２が配置されている。A hard rubber ring 3 containing a damping rubber 4 and having a flat triangular cross section is disposed so as to contact both width ends on the inner diameter side of the breaker belt layer 7a on the inner diameter side. The bottom side of the hard rubber ring 3 is located on the tire inner diameter side. A pair of cap plies 2 are arranged on the outer diameter side of both width ends of the breaker belt layer 7a so as to hold the breaker belt layers 7a and 7b in cooperation with the hard rubber ring 3.
【００１２】カーカス層６のターンアップ部、即ち、ビ
ード部８には、環状の硬鋼線よりなるビードコア９と、
その外周に貼着された断面三角形状の硬質ゴム製のエイ
ペックス１０とが配設され、エイペックス１０の側部に
は、ビードコア９と同心状をなすビード部補強層５が配
設されている。At the turn-up portion of the carcass layer 6, that is, the bead portion 8, a bead core 9 made of an annular hard steel wire,
An apex 10 made of hard rubber and having a triangular cross-section is attached to the outer periphery of the apex 10, and a bead portion reinforcing layer 5 concentric with the bead core 9 is provided on a side portion of the apex 10. There is.
【００１３】キャッププライ２及びビード部補強層５を
構成する線条材は、その長さ方向において波形又はコイ
ル状に変形加工された硬鋼単線１１、或いは撚線１２の
複数本束の線状物を並列配置し、その周面をゴム被覆し
たゴム被覆線条体１３である。なお、サイドウォール部
の補強層１４はタイヤ１の径方向に複数併設した方が、
より効果的である。The filament material constituting the cap ply 2 and the bead portion reinforcing layer 5 is made of a hard steel single wire 11 deformed into a corrugated shape or a coil shape in the length direction, or a plurality of bundles of twisted wires 12. This is a rubber-coated linear body 13 in which objects are arranged in parallel and the peripheral surface thereof is covered with rubber. In addition, when a plurality of side wall reinforcement layers 14 are provided side by side in the radial direction of the tire 1,
More effective.
【００１４】線条体１３の複数巻回の方法は、キャップ
プライ２については並列巻回１層のほか、２層以上の複
数層巻回の場合もある。一方、ビード部補強層５につい
ては、ビードコア９近傍が最も大きな剛性を必要とし、
エイペックス１０の外径側に近づくに従って剛性を小さ
くしたいというタイヤの性質に倣って、図１及び図２の
ビードコア９の部分を示す円内の図から明らかなよう
に、例えばビード部８内径側から、すなわちビードコア
９側からビードコア９と同心状に前記ゴム被覆線状体１
３をタイヤ径方向に積層されるように３層巻し、その３
層巻の位置からタイヤ径方向の外側に間隔を開けた位置
においてタイヤ径方向に積層されるように３層巻又は２
層巻し、さらに、その３層巻又は２層巻の位置からタイ
ヤ径方向の外側に間隔を開けた位置においてタイヤ径方
向に積層されるように２層巻又は１層巻し、そして、そ
の２層巻又は１層巻の位置からタイヤ径方向の外側に間
隔を開けた位置において１層巻といった方法でよい。Regarding the method of winding the filament 13 in a plurality of windings, the cap ply 2 may be a single layer of parallel winding or a plurality of layers of two or more layers. On the other hand, regarding the bead portion reinforcing layer 5, the vicinity of the bead core 9 requires the highest rigidity,
In accordance with the property of the tire that it is desired to reduce the rigidity as it approaches the outer diameter side of the apex 10 ,
As is clear from the drawing inside the circle showing the bead core 9
To, for example, from the bead portion 8 radially inner side, i.e. the bead core
The rubber-coated linear body 1 is concentric with the bead core 9 from the 9 side.
3 is wound in 3 layers so as to be laminated in the tire radial direction, and 3
Position spaced from the position of Somaki outside in the tire radial direction
3 layers or 2 so as to be laminated in the tire radial direction
Layer winding , and then tie from the position of the three-layer winding or the two-layer winding.
Tire radial direction at a position spaced apart in the radial direction
2 layers or 1 layer so that they are laminated in parallel , and
From the position of 2 Somaki or 1 Somaki Te position odor drilled between <br/> intervals on the outside of the tire radial direction may be a method such as 1 Somaki of.
【００１５】又、キャッププライ２に関しては、図２に
示すように、キャッププライ２を１枚にして、その巻回
巾をブレーカーベルト層７ａ，７ｂの全巾をカバーする
ようにしてもよい。但し、この場合の前記線状体の巻回
ピッチ、即ち配列密度はブレーカーベルト層７ａ，７ｂ
の巾方向側端部ほど密に、そして中央部ほど疎にするこ
とが好ましい。As for the cap ply 2, as shown in FIG. 2, one cap ply 2 may be provided, and its winding width may cover the entire width of the breaker belt layers 7a and 7b. However, in this case, the winding pitch of the linear bodies, that is, the arrangement density is determined by the breaker belt layers 7a and 7b.
It is preferable that the widthwise end of the is denser and the central part is sparser.
【００１６】[0016]
【発明の効果】以上述べたように、請求項１の発明にお
いては、キャッププライと偏平三角形状断面の硬質ゴム
リングとでブレーカーベルト層の変形を強制的に制御し
たことと、他方、ビード部補強層を配置したことによっ
て、タイヤとリムとの一体化が向上し、素早い応答性を
確保したこととの相乗効果により、ブレーカーベルト層
を薄くできるとともに、タイヤサイドウォール部を薄く
でき、１５インチ及び１６インチのラジアルタイヤで実
験の結果、約１５％〜２０％の軽量化を実現したラジア
ルタイヤを得ることができた。また、ブレーカーベルト
層の変形を抑制できることと、タイヤとリムとの一体化
が向上することにより、安全性の向上に寄与できる。As described above, according to the first aspect of the invention, the deformation of the breaker belt layer is forcibly controlled by the cap ply and the hard rubber ring having a flat triangular cross section, and, on the other hand, the bead portion. By arranging the reinforcing layer, the tire and the rim are more integrated, and the synergistic effect with the quick response ensured that the breaker belt layer can be made thinner and the tire sidewall portion can be made thinner. As a result of an experiment using a 16-inch radial tire and a radial tire, it was possible to obtain a radial tire that realized a weight reduction of approximately 15% to 20%. Further, the deformation of the breaker belt layer can be suppressed and the integration of the tire and the rim is improved, which can contribute to the improvement of safety.
【００１７】また、請求項１の発明のように、キャップ
プライ２を構成する線状体１３を非金属線で構成すれ
ば、軽量化を達成できる。 Further, as in the invention of claim 1, when constituting the linear body 13 constituting the cap ply 2 in a non-metallic wire, it can achieve weight reduction.
【００１８】請求項２発明のように、硬質ゴムリング３
内に制振ゴムを配設すれば、制振効果を期待でき、この
ため、キャッププライ２のタイヤゴム１５からの剥離防
止効果を期待できる。According to a second aspect of the invention, the hard rubber ring 3 is used.
If a damping rubber is provided inside, a damping effect can be expected, and therefore, an effect of preventing separation of the cap ply 2 from the tire rubber 15 can be expected.
【００１９】さらに、請求項１の発明のように、硬質ゴ
ムリング３を断面扁平三角形状に形成し、その底辺がタ
イヤ内径側に位置するようにすれば、硬質ゴムリング３
を安定しておさめることができる。 Further, when the hard rubber ring 3 is formed in a flat triangular cross section and the base is located on the tire inner diameter side as in the first aspect of the invention, the hard rubber ring 3 is formed.
Can be kept stable.
【００２０】請求項３の発明のように、キャッププライ
２をブレーカーベルト７ａの両巾端部に設ければ、キャ
ッププライ２全体の軽量化に寄与でき、請求項４の発明
のように、キャッププライをブレーカーベルトの幅全体
に設ければ、トレッド部の補強に有効である。[0020] As the invention of claim 3, by providing the cap ply 2 at both width ends of the breaker belt 7a, it can contribute to weight reduction of the entire cap ply 2, as in the invention of claim 4, cap Providing a ply over the entire width of the breaker belt is effective for reinforcing the tread portion.
【図１】 この発明を具体化した空気入りラジアルタイ
ヤの破断斜視図。FIG. 1 is a cutaway perspective view of a pneumatic radial tire embodying the present invention.
【図２】 同じく変形例を示す破断斜視図。FIG. 2 is a cutaway perspective view showing a modified example of the same.
１…空気入りラジアルタイヤ、２…キャッププライ、３
…硬質ゴムリング、４…制振ゴム、５…補強層、６…カ
ーカス層、８…ビード部、９…ビードコア、１０…エイ
ペックス、１１…硬鋼単線、１２…撚線、１３…ゴム被
覆線1 ... Pneumatic radial tire, 2 ... Cap ply, 3
... hard rubber ring, 4 ... damping rubber, 5 ... reinforcing layer, 6 ... carcass layer, 8 ... bead portion, 9 ... bead core, 10 ... ray.
Pex, 11 ... hard steel single wire, 12 ... stranded wire, 13 ... rubber coated wire
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ６０Ｃ 13/00 Ｂ６０Ｃ 13/00 Ｇ 15/00 15/00 Ｎ (56)参考文献 特開 平10−71809（ＪＰ，Ａ) 特開 平２−92703（ＪＰ，Ａ) 特開 平10−236108（ＪＰ，Ａ) 特開 平10−230714（ＪＰ，Ａ) 特開 平11−20405（ＪＰ，Ａ) 特開 平９−328002（ＪＰ，Ａ) 特開 昭48−83503（ＪＰ，Ａ) 特開 平１−44721（ＪＰ，Ａ) 実開 平６−53212（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60C 9/18 - 9/22,13/00 B60C 15/00,15/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI B60C 13/00 B60C 13/00 G 15/00 15/00 N (56) Reference JP-A-10-71809 (JP, A) JP-A-2-92703 (JP, A) JP-A-10-236108 (JP, A) JP-A-10-230714 (JP, A) JP-A-11-20405 (JP, A) JP-A-9-328002 (JP, A) JP-A-48-83503 (JP, A) JP-A-1-44721 (JP, A) Actual Kaihei 6-53212 (JP, U) (58) Fields investigated (Int. Cl. 7) , DB name) B60C 9/18-9 / 22,13 / 00 B60C 15 / 00,15 / 06
Claims (4)
の如くその長さ方向において変形加工を施した１本又は
複数本束の線条物にゴム被覆を施し、そのゴム被覆され
た線条体をブレーカーベルトの外径側に配置して、その
線状体を偏平三角形状断面を有する硬質ゴムリングと併
用してブレーカーベルトをサンドイッチ状に保持するキ
ャッププライとして複数回巻回するとともに、ビード部
の側部に、ビードコアと同心状をなす補強層を設け、そ
の補強層は、タイヤ径方向に間隔を開けた複数位置に前
記線状体を巻回して構成し、硬質ゴムリングは断面扁平
三角形状をなし、その底辺がタイヤ内径側に位置してい
ることを特徴とする空気入りラジアルタイヤ。1. A rubber-coated single or multi-strand wire having a corrugated shape, a coil shape, or the like, which has been deformed in its lengthwise direction, or a bundle of filaments, and the rubber-coated filament. The body is arranged on the outer diameter side of the breaker belt, and the linear body is used in combination with a hard rubber ring having a flat triangular cross section to be wound a plurality of times as a cap ply for holding the breaker belt in a sandwich form, and a bead. the side parts, the reinforcing layer is provided that forms the bead core and the heart-shaped, its
The reinforcement layer of the front of the tire at multiple positions spaced in the radial direction of the tire.
A hard rubber ring has a flat cross section.
It has a triangular shape, and its base is located on the tire inner diameter side.
A pneumatic radial tire characterized by that.
設されている請求項１に記載の空気入りラジアルタイ
ヤ。 2. A damping rubber is arranged inside the hard rubber ring.
The pneumatic radial tie according to claim 1, which is provided.
Ya.
巾端部に設けられている請求項１または２に記載の空気
入りラジアルタイヤ。 3. The cap ply is provided on both sides of a breaker belt.
The air according to claim 1 or 2, which is provided at a width end portion.
Radial tires with.
全体に設けられている請求項１または２に記載の空気入
りラジアルタイヤ。 4. The cap ply is the width of the breaker belt.
The inflator according to claim 1 or 2, which is provided on the whole.
Radial tires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27056799A JP3449692B2 (en) | 1999-09-24 | 1999-09-24 | Pneumatic radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27056799A JP3449692B2 (en) | 1999-09-24 | 1999-09-24 | Pneumatic radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001088512A JP2001088512A (en) | 2001-04-03 |
| JP3449692B2 true JP3449692B2 (en) | 2003-09-22 |
Family
ID=17487966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27056799A Expired - Fee Related JP3449692B2 (en) | 1999-09-24 | 1999-09-24 | Pneumatic radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3449692B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004058516A1 (en) * | 2002-12-26 | 2004-07-15 | Societe De Technologie Michelin | Run-flat tyre with variable-rigidity sidewalls |
| FR2887812A1 (en) * | 2005-06-30 | 2007-01-05 | Michelin Soc Tech | PNEUMATIC FOR HEAVY VEHICLES |
| JP4972894B2 (en) * | 2005-08-19 | 2012-07-11 | 横浜ゴム株式会社 | Pneumatic tire |
-
1999
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