JP2567836B2 - Radial tires for motorcycles - Google Patents
Radial tires for motorcyclesInfo
- Publication number
- JP2567836B2 JP2567836B2 JP60252658A JP25265885A JP2567836B2 JP 2567836 B2 JP2567836 B2 JP 2567836B2 JP 60252658 A JP60252658 A JP 60252658A JP 25265885 A JP25265885 A JP 25265885A JP 2567836 B2 JP2567836 B2 JP 2567836B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- belt
- cord
- layer
- pair
- 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
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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/10—Tyres specially adapted for particular applications for motorcycles, scooters or the like
Landscapes
- Tires In General (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、二輪車用ラジアルタイヤ対、特に前輪用タ
イヤおよび後輪用タイヤのベルト構造の改良に関するも
のである。TECHNICAL FIELD The present invention relates to an improvement in a belt structure of a radial tire pair for a motorcycle, particularly a front tire and a rear tire.
（従来の技術） 従来、二輪車用ラジアルタイヤでは、タイヤトレッド
部のカーカス層の半径方向外側に設けられるベルトは、
少なくとも２層のベルト層にて構成されていたが、近年
の二輪車の高速化、軽量化に対応する目的で、特に、ア
スペクトレシオが非常に小さいタイヤにおいて、タイヤ
トレッド部のカーカス層の周りに、１本の撚りコードを
タイヤ周方向に対して実質的に０゜のコード角度で連読
的に巻きつけることにより構成した１層のベルト層、所
謂スパイラルベルトを設けたラジアルタイヤが開発され
ている。(Prior Art) Conventionally, in a radial tire for a motorcycle, a belt provided on the outer side in the radial direction of the carcass layer of the tire tread is
Although it was composed of at least two belt layers, for the purpose of responding to the recent speeding up and weight reduction of motorcycles, particularly in a tire with a very small aspect ratio, around the carcass layer of the tire tread, A radial tire provided with a single belt layer, which is formed by continuously winding one twisted cord continuously at a cord angle of 0 ° with respect to the tire circumferential direction, that is, a so-called spiral belt has been developed. .
（発明が解決しようとする問題点） しかしながら、このようなスパイラルベルトで構成さ
れた、１層のベルト層を有するラジアルタイヤは、二輪
車の操縦安定性を確保することが、従来の、少なくとも
２層のベルト層を有するラジアルタイヤに比べて難しい
ことが判明してきている。(Problems to be Solved by the Invention) However, a radial tire having one belt layer formed of such a spiral belt is capable of ensuring steering stability of a two-wheeled vehicle by at least two layers. It has been found to be more difficult than the radial tire having the belt layer.
二輪車の操縦性とは、コーナリングやスラローム時の
車の応答性や応答のリニアーリティを言い、また、安定
性とは、直進時および旋回時に前後輪に連成振動がいか
に発生し難いかを言い、一般にこれらの特性は実車での
ライダーのフィーリングによつて評価されている。Two-wheeled vehicle maneuverability refers to the responsiveness and linearity of the vehicle response during cornering and slalom, and stability refers to how difficult it is to generate coupled vibrations between the front and rear wheels when going straight and turning. Generally, these characteristics are evaluated by the feeling of the rider in the actual vehicle.
これがため、本発明の目的は、上述したスパイラルベ
ルトで構成されるただ１層のベルト層だけを有する、ア
スペクトレシオの低い二輪車用空気入りラジアルタイヤ
を前後の対としてみて、対をなすタイヤのベルト構造に
改良を加えることによって、操縦安定性の十分なる向上
をもたらすことにある。Therefore, an object of the present invention is to consider a pneumatic radial tire for a motorcycle having a low aspect ratio, which has only one belt layer composed of the above-mentioned spiral belt, as a front and rear pair, and a pair of belts of the tire. It is intended to bring about a sufficient improvement in steering stability by improving the structure.
（問題点を解決するための手段） 本発明者は、１層のベルト層だけを有するラジアルタ
イヤ対の操縦安定性を向上させるための種々の試験を行
なつた結果、前輪用タイヤのベルト層全体の強度と、後
輪用タイヤのベルト層全体の強度の組合せを適切に選定
することによつて良好な操縦安定性が得られるという事
実を見出した。(Means for Solving the Problems) The present inventor has conducted various tests for improving the steering stability of a radial tire pair having only one belt layer, and as a result, the belt layer of the front wheel tire has been obtained. It was found that good steering stability can be obtained by appropriately selecting the combination of the overall strength and the strength of the entire belt layer of the rear tire.
これがため、本発明によれば、図面に示すように、ト
レッド部１と、１対のサイドウオール部２と、ビート部
３とを有し、また、カーカスコードがタイヤ周方向に対
し70゜〜90゜のコード角度で配置されて一方のビート部
から他方のビート部まで延在する少なくとも１層のカー
カス層４と、このカーカス層の半径方向外側に、少なく
とも１本の撚りコード５をタイヤ周方向に対して実質的
に０゜のコード角度で連続的に巻きつけてなる１層のベ
ルト層６とを有し、タイヤトレッド幅Twとタイヤ断面高
さＨとの比H/Twが0.75以下の低アスペクトレシオの二輪
車用ラジアルタイヤにおいて、前記ベルト層６の撚りコ
ード５の１本当りの強力Ａが前輪用タイヤ（AF）では30
≦AF≦60kgで、後輪用タイヤ（AR）では40≦AR≦90kgで
あり、かつ、前記ベルト層６の空間率Ｂが前輪用および
後輪用タイヤ（BF,BR）のいずれも20％≦BF,BR≦50％で
あり、AF,AR,BFおよびBRの間に下記の関係1500kg％＜AF
×（100−BF）＜AR×（100−BR）＜7200kg％が成立する
よう組合せたことを特徴とする。Therefore, according to the present invention, as shown in the drawings, it has a tread portion 1, a pair of side wall portions 2 and a beat portion 3, and the carcass cord is 70 ° to the tire circumferential direction. At least one carcass layer 4 arranged at a cord angle of 90 ° and extending from one beat portion to the other beat portion, and at least one twisted cord 5 on the tire radial direction outside the carcass layer. A belt layer 6 of one layer continuously wound at a cord angle of substantially 0 ° with respect to the direction, and the ratio H / Tw of the tire tread width Tw to the tire section height H is 0.75 or less. In the low aspect ratio radial tire for motorcycles, the strength A per twist cord 5 of the belt layer 6 is 30 for the front tire (A F ).
≦ A F ≦ 60 kg, 40 ≦ A R ≦ 90 kg for the rear tire (A R ), and the void ratio B of the belt layer 6 is a front tire and a rear tire (B F , B R ). 20% ≤ B F , B R ≤ 50%, and the following relationship between A F , A R , B F and B R 1500 kg% <A F
× (100-B F) < A R × (100-B R) <7200kg% , characterized in that the combination to establish.
本発明による二輪車用ラジアルタイヤにおいては、ベ
ルト層を形成するベルトコードとして有機繊維の撚りコ
ードまたはスチールコードを用いることができる。In the radial tire for a motorcycle according to the present invention, a twisted cord of organic fiber or a steel cord can be used as the belt cord forming the belt layer.
（作 用） 前輪用タイヤのベルトコードの強力AFが60kgを超える
場合および、前輪用タイヤのベルト空間率BFが20％未満
の場合はいずれも、旋回性、直進性（安定性）が劣化
し、接地感も得られなくなり、一方、強力AFが30kg未満
の場合および、空間率BFが50％を超える場合には、剛性
感が得られず、応答性、応答のリニアーリティが失われ
る。(Working) When the belt tire strength A F of the front wheel tire exceeds 60 kg and when the belt porosity B F of the front wheel tire is less than 20%, turning performance and straightness (stability) are When the strength A F is less than 30 kg and the porosity B F exceeds 50%, the feeling of rigidity is not obtained and the responsiveness and linearity of the response deteriorate. Lost.
後輪用のタイヤのベルトコードの強力ARが90kgを超え
る場合および、後輪用タイヤのベルト空間率BRが20％未
満の場合はいずれも、旋回性、直進性（安定性）が劣化
し、前後輪の連成振動が発生し、一方、強力ARが40kg未
満の場合および、空間率BRが50％を超える場合は、剛性
感が得られず、応答性、応答のリニアーリティが失われ
る。The turning performance and straightness (stability) are deteriorated when the strength A R of the belt cord of the tire for the rear wheels exceeds 90 kg and when the belt porosity B R of the tire for the rear wheels is less than 20%. However, coupled vibration of the front and rear wheels occurs, on the other hand, when the strong A R is less than 40 kg and the porosity B R exceeds 50%, a feeling of rigidity cannot be obtained, and responsiveness and linearity of response are obtained. Is lost.
またここで、AF×（100−BF）≧AR×（100−BR）で
は、旋回時に後輪側から倒れ込み、二輪車の旋回時の安
定性が失われる。In addition, when A F × (100−B F ) ≧ A R × (100−B R ), the vehicle falls down from the rear wheel side at the time of turning, and the stability of the two-wheeled vehicle at the time of turning is lost.
さらに、それらの値が1500kg％以下では、剛性が低く
なりすぎ、7200kg％以上では適正な接地性が得られなく
なる。Further, if those values are 1500 kg% or less, the rigidity becomes too low, and if they are 7200 kg% or more, proper grounding performance cannot be obtained.
（実施例） 第１表に本発明による実施例（B,C）を比較例（A,D,
E,F,G,H,I,J）とともに示す。これらの実施例および比
較例におけるタイヤサイズは前輪用タイヤが120/60VR18
で、後輪用タイヤが150/60VR18であった。(Examples) Table 1 shows examples (B, C) according to the present invention as comparative examples (A, D,
E, F, G, H, I, J). The tire size in these examples and comparative examples is 120/60 VR18 for the front tire.
And the tires for the rear wheels were 150/60 VR18.
（発明の効果） 本発明の作用効果を確認するため実施例および比較例
について実車テストを行ない、その結果を第１表に示し
ている。(Effects of the Invention) In order to confirm the effects of the present invention, actual vehicle tests were carried out on Examples and Comparative Examples, and the results are shown in Table 1.
このテストでは1000ccの自動二輪車に第１表に示す組
合せでタイヤを装着し、一周5.5kmの周回路を最高速度2
30kmで走行し、ライダーのフイーリングで評価した。実
車評価は10点満点とし、6.0点以上を良とした。In this test, the tires were mounted on the 1000cc motorcycle in the combinations shown in Table 1, and a circuit with a circumference of 5.5km was run at a maximum speed of 2
It was run at 30km and evaluated by the rider's feeling. The actual vehicle evaluation was a perfect score of 10, and a score of 6.0 or above was good.
図面は本発明によるタイヤの部分縦断面図である。 １……トレッド部、２……サイドウオール部 ３……ビード部、４……カーカス層 ５……ベルトコード、６……ベルト層 The drawing is a partial longitudinal section through a tire according to the invention. 1 ... Tread part, 2 ... sidewall part 3 ... bead part, 4 ... carcass layer 5 ... belt cord, 6 ... belt layer
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６０Ｃ 9/22 7504−3Ｂ Ｂ６０Ｃ 9/22 Ａ (56)参考文献 特開 昭59−73307（ＪＰ，Ａ) 特開 昭55−8966（ＪＰ，Ａ) 特開 昭60−199703（ＪＰ，Ａ) 特開 昭58−194604（ＪＰ，Ａ) 特開 昭60−234009（ＪＰ，Ａ) 実開 昭58−160805（ＪＰ，Ｕ) 特公 昭44−17801（ＪＰ，Ｂ１)Continuation of front page (51) Int.Cl. 6 Identification number Internal reference number for FI Technical indication B60C 9/22 7504-3B B60C 9/22 A (56) References JP-A-59-73307 (JP, A) JP-A-55-8966 (JP, A) JP-A-60-199703 (JP, A) JP-A-58-194604 (JP, A) JP-A-60-234009 (JP, A) Practical application Sho-58-160805 (JP, U) JP-B-44-17801 (JP, B1)
Claims (3)
と、ビード部と、カーカスコードがタイヤ周方向に対し
70゜〜90゜のコード角度で配置されて一方のビード部か
ら他方のビード部まで延在する少なくとも１層のカーカ
ス層とを有し、このカーカス層の半径方向外側に、少な
くとも１本の撚りコードをタイヤ周方向に対して実質的
に０゜のコード角度で連続的に巻きつけてなるベルト層
が一層だけ設けられた、アスペクトレシオが0.75以下の
二輪車用ラジアルタイヤ対であって、 前記ベルト層の撚りコードの１本当りの強力Ａが、前輪
用タイヤ（AF）では30≦AF≦60kgで、後輪用タイヤ
（AR）では40≦AR≦90kgであり、かつ、前記ベルト層の
空間率Ｂが、前輪用および後輪用タイヤ（BF,BR）のい
ずれも20％≦BF,BR≦50％であり、AF,AR,BFおよびBRの
間に下記の関係 1500kg％＜AF×(100-BＦ)＜AR×(100-BＲ)＜7200kg％ が成立するよう組合せたことを特徴とする二輪車用ラジ
アルタイヤ対。1. A tread portion, a pair of sidewall portions, a bead portion, and a carcass cord in a tire circumferential direction.
At least one carcass layer disposed at a cord angle of 70 ° to 90 ° and extending from one bead portion to the other bead portion, and at least one twist on the outer side in the radial direction of the carcass layer. A radial tire pair for a motorcycle having an aspect ratio of 0.75 or less, which is provided with only one belt layer in which cords are continuously wound at a cord angle of substantially 0 ° with respect to the tire circumferential direction. The strength A per twisted cord of the layer is 30 ≦ A F ≦ 60 kg for the front tire (A F ), 40 ≦ A R ≦ 90 kg for the rear tire (A R ), and The porosity B of the belt layer is 20% ≦ B F , B R ≦ 50% for both front and rear tires (B F , B R ), and A F , A R , B F and B R characterized in that the relation 1500 kg% below <a F × (100-B F) <a R × (100-B R) <7200kg% were combined to establish between the Radial tire pair for a motorcycle that.
機繊維であることを特徴とする特許請求の範囲第１項に
記載のタイヤ対。2. The tire pair according to claim 1, wherein the belt cords forming the belt layer are organic fibers.
チールコードであることを特徴とする特許請求の範囲第
１項に記載のタイヤ対。3. The tire pair according to claim 1, wherein the belt cord forming the belt layer is a steel cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60252658A JP2567836B2 (en) | 1985-11-13 | 1985-11-13 | Radial tires for motorcycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60252658A JP2567836B2 (en) | 1985-11-13 | 1985-11-13 | Radial tires for motorcycles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62113605A JPS62113605A (en) | 1987-05-25 |
| JP2567836B2 true JP2567836B2 (en) | 1996-12-25 |
Family
ID=17240418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60252658A Expired - Fee Related JP2567836B2 (en) | 1985-11-13 | 1985-11-13 | Radial tires for motorcycles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2567836B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4046824A1 (en) | 2021-02-18 | 2022-08-24 | Sumitomo Rubber Industries, Ltd. | Motorcycle tire pair |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2915409B2 (en) * | 1987-10-27 | 1999-07-05 | 株式会社ブリヂストン | Flat pneumatic radial tires for motorcycles |
| GB8813776D0 (en) * | 1988-06-10 | 1988-07-13 | Sumitomo Rubber Ind | Motor cycle radial tyre |
| JPH04365604A (en) * | 1990-08-24 | 1992-12-17 | Sumitomo Rubber Ind Ltd | Radial tire |
| JPH04342603A (en) * | 1991-05-20 | 1992-11-30 | Sumitomo Rubber Ind Ltd | Tire for motorcycle |
| IT1283351B1 (en) | 1996-07-29 | 1998-04-17 | Pirelli | TIRE WITH HIGH TRANSVERSAL CURVATURE IN PARTICULAR FOR FRONT WHEELS |
| US20070158008A1 (en) * | 2004-01-26 | 2007-07-12 | Tsutomu Nakamura | Pneumatic radial tire for motorcycle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS558966A (en) * | 1978-07-05 | 1980-01-22 | Euteco Spa | Tire |
| JPS58160805U (en) * | 1982-04-21 | 1983-10-26 | 株式会社ブリヂストン | Pneumatic tires for two-wheeled vehicles |
| JPS58194604A (en) * | 1982-05-11 | 1983-11-12 | Toyo Tire & Rubber Co Ltd | Air tire |
| JPS5973307A (en) * | 1982-10-18 | 1984-04-25 | Bridgestone Corp | Pneumatic belted tyre pair for motorcycle |
| JPS60199703A (en) * | 1984-03-26 | 1985-10-09 | Sumitomo Rubber Ind Ltd | Belted bias tire |
-
1985
- 1985-11-13 JP JP60252658A patent/JP2567836B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4046824A1 (en) | 2021-02-18 | 2022-08-24 | Sumitomo Rubber Industries, Ltd. | Motorcycle tire pair |
| US11760131B2 (en) | 2021-02-18 | 2023-09-19 | Sumitomo Rubber Industries, Ltd. | Motorcycle tire pair |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62113605A (en) | 1987-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |