JP2002307910A - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JP2002307910A JP2002307910A JP2001114275A JP2001114275A JP2002307910A JP 2002307910 A JP2002307910 A JP 2002307910A JP 2001114275 A JP2001114275 A JP 2001114275A JP 2001114275 A JP2001114275 A JP 2001114275A JP 2002307910 A JP2002307910 A JP 2002307910A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- layer
- cover layer
- belt cover
- gpa
- 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.)
- Granted
Links
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気入りラジアル
タイヤに関し、さらに詳しくは、ベルト層を補強するベ
ルトカバ−層の改良により耐久性を維持しつつ、高周波
ロ−ドノイズを低減させると共に、軽量化を図った空気
入りラジアルタイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic radial tire, and more particularly, to improvement of a belt cover layer which reinforces a belt layer to reduce high-frequency load noise and reduce weight while maintaining durability. And a pneumatic radial tire.
【０００２】[0002]
【従来技術】近年の車両の高級化、高品質化に伴い、車
両の低振動化と低燃費化が急速に進み、これを受けてタ
イヤにも走行中に路面から受ける振動により車内の空気
を振動させて生ずるいわゆるロ−ドノイズの低減化及び
タイヤ走行中の転がり抵抗を低減するためのタイヤ重量
の軽量化が強く望まれるようになった。2. Description of the Related Art With the recent sophistication and quality of vehicles, low vibration and low fuel consumption of vehicles have been rapidly progressing. There has been a strong demand for reduction of so-called load noise caused by vibration and reduction of tire weight for reducing rolling resistance during tire running.
【０００３】従来、空気入りラジアルタイヤの耐久性を
維持しながらロ−ドノイズを低減するために、例えば、
図３に示すように左右一対のビード部１、１にカーカス
層２を装架し、トレッド部３におけるカ−カス層２の外
側に二層のベルト層５ａ、５ｂを設け、これらのベルト
層５ａ、５ｂの外側に、これらのベルト層の全部を覆う
ナイロン等の有機繊維コ−ドからなる全幅ベルトカバー
層８（フルカバ−層）を配置すると共に全幅ベルトカバ
ー層８の幅方向両端部を覆うポリエステル繊維コ−ドか
らなる端部ベルトカバー層９、９（エッジカバー層）を
配置して、ベルト層５ａ、５ｂを補強したベルト構造を
有するタイヤが知られている（特開平１１−２０８２１
２号公報）。Conventionally, in order to reduce the load noise while maintaining the durability of a pneumatic radial tire, for example,
As shown in FIG. 3, a carcass layer 2 is mounted on a pair of left and right bead portions 1 and 1, and two belt layers 5a and 5b are provided outside the carcass layer 2 in the tread portion 3, and these belt layers are provided. A full-width belt cover layer 8 (full cover layer) made of an organic fiber code such as nylon, which covers all of these belt layers, is disposed outside the belt layers 5a and 5b. There is known a tire having a belt structure in which end belt cover layers 9 and 9 (edge cover layers) made of a covering polyester fiber code are arranged to reinforce the belt layers 5a and 5b (JP-A-11-20821).
No. 2).
【０００４】しかしながら、かかるベルト構造では耐久
性を維持することはできるものの、走行中に路面からト
レッド部を経由してベルト層に伝達される振動のうち、
特にベルト層端部に発生する振動を抑制するには剛性が
不足しているために高周波域のロ−ドノイズの低減効果
が充分とはいえず、加えてベルト補強層（全幅ベルトカ
バー層８＋端部ベルトカバー層９、９）の量が嵩むため
軽量化を図ることができなかった。However, while such a belt structure can maintain durability, of the vibration transmitted from the road surface to the belt layer via the tread portion during traveling,
In particular, the rigidity is insufficient to suppress the vibration generated at the end of the belt layer, so that the effect of reducing the load noise in the high frequency range is not sufficient. In addition, the belt reinforcing layer (full width belt cover layer 8 + end) The weight of the outer belt cover layers 9 and 9) could not be reduced because of the increased amount.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、耐久
性を維持しつつ、高周波域のロ−ドノイズを低減させる
と共に、軽量化を可能にした空気入りラジアルタイヤを
提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a pneumatic radial tire capable of reducing the load noise in a high frequency range and reducing the weight while maintaining durability.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明は、トレッド部におけるカ−カス層の外側に少
なくとも一層のベルト層を設け、いずれかのベルト層の
外側にベルトカバ−層を配置した空気入りラジアルタイ
ヤにおいて、前記ベルトカバー層をベルト層の幅方向端
部を覆う端部ベルトカバー層と最大幅ベルト層の中央部
に位置する中央部ベルトカバ−層とで構成し、これらの
端部ベルトカバー層と中央部ベルトカバ−層のうち少な
くとも２つを引っ張り強度が２．０ＧＰａ以上で、弾性
率が７０ＧＰａ以上の有機繊維コ−ドで形成したことを
要旨とする。According to the present invention, at least one belt layer is provided outside a carcass layer in a tread portion, and a belt cover layer is provided outside one of the belt layers. In the arranged pneumatic radial tire, the belt cover layer is composed of an end belt cover layer covering an end in the width direction of the belt layer and a central belt cover layer located at the center of the maximum width belt layer. The gist is that at least two of the end belt cover layer and the central belt cover layer are formed of an organic fiber cord having a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more.
【０００７】また、本発明は、トレッド部におけるカ−
カス層の外側に少なくとも一層のベルト層を設け、いず
れかのベルト層の外側にベルトカバ−層を配置した空気
入りラジアルタイヤにおいて、前記ベルトカバー層をベ
ルト層の幅方向端部を覆う端部ベルトカバー層と全部の
ベルト層を覆う全幅ベルトカバー層とで構成し、前記端
部ベルトカバー層を引っ張り強度が２．０ＧＰａ以上
で、弾性率が７０ＧＰａ以上の有機繊維コ−ドで形成す
ると共に、前記全幅ベルトカバー層を引っ張り強度が
２．０ＧＰａ未満で、弾性率が７０ＧＰａ未満の有機繊
維コ−ドで形成したことを要旨とする。[0007] Further, the present invention provides a method for controlling a car in a tread portion.
In a pneumatic radial tire in which at least one belt layer is provided outside a waste layer, and a belt cover layer is provided outside any of the belt layers, the end belt that covers the width direction end of the belt layer with the belt cover layer A cover layer and a full-width belt cover layer covering all the belt layers, wherein the end belt cover layer is formed of an organic fiber code having a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more; The gist is that the full-width belt cover layer is formed of an organic fiber cord having a tensile strength of less than 2.0 GPa and an elastic modulus of less than 70 GPa.
【０００８】このように端部ベルトカバー層と中央部ベ
ルトカバ−層のうち少なくとも２つ又は端部ベルトカバ
ー層だけを引っ張り強度が２．０ＧＰａ以上で、弾性率
が７０ＧＰａ以上という高強度・高弾性の有機繊維コ−
ドで形成したため、走行中に路面からトレッド部を経由
してベルト層に伝達される振動のうち、特にベルト層の
端部に発生する振動が抑えられると共に、この振動がベ
ルト層の中央部で共振するのが防止されるから、ロ−ド
ノイズを低減することが可能となる。また、使用する有
機繊維コ−ドが上記のように高強度・高弾性のものであ
るため、コ−ドの使用量を少なくしても耐久性を維持す
ることができ、かつコ−ドの使用量を少なくすることに
より軽量化が可能となる。As described above, at least two of the end belt cover layer and the central belt cover layer or only the end belt cover layer have a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more. Organic fiber core
Of the vibration transmitted from the road surface to the belt layer through the tread during traveling, vibration generated particularly at the end of the belt layer is suppressed, and this vibration is generated at the center of the belt layer. Since resonance is prevented, load noise can be reduced. Further, since the organic fiber cord used is of high strength and high elasticity as described above, the durability can be maintained even if the used amount of the cord is reduced, and the cord can be used. By reducing the amount used, the weight can be reduced.
【０００９】[0009]
【発明の実施の形態】以下、添付図面を引用して本発明
の実施形態を説明する。各図において、同一の構成要素
には同一の符号を付し、重複した説明は省略する。Embodiments of the present invention will be described below with reference to the accompanying drawings. In each of the drawings, the same components are denoted by the same reference numerals, and redundant description will be omitted.
【００１０】図１は本発明の一実施形態の概要を示す空
気入りラジアルタイヤの子午線方向断面図で、本発明タ
イヤは、左右一対のビ−ド部１，１と、両ビ−ド部１，
１にまたがって延びるトロイド状のカ−カス層２と、カ
−カス層２のクラウン部に位置するトレッド部３と、カ
−カス層２の両側に位置するサイドウオ−ル部４，４と
を備え、トレッド部におけるカ−カス層２の外側に一層
のベルト層５とその外側に両端部を覆う端部ベルトカバ
−層６ａ，６ａとベルト層５の中央部に位置する中央部
ベルトカバ−層６ｂとを配置する。FIG. 1 is a meridional sectional view of a pneumatic radial tire showing an outline of an embodiment of the present invention. The tire of the present invention has a pair of left and right bead portions 1 and 1 and both bead portions 1. ,
1, a toroidal carcass layer 2 extending over the carcass layer 1, a tread portion 3 located on the crown portion of the carcass layer 2, and side wall portions 4 and 4 located on both sides of the carcass layer 2. A belt layer 5 outside the carcass layer 2 in the tread portion, end belt cover layers 6a, 6a covering both ends outside the belt layer 5, and a central belt cover layer 6b located at the center of the belt layer 5; And place.
【００１１】ここで、端部ベルトカバ−層６ａ，６ａは
ベルト層５の両端部における剛性の段差を解消するため
にベルト層５の両端部を覆うように配置する。また、ベ
ルト層の両端部を覆う端部ベルトカバ−層６ａ，６ａの
総幅と中央部ベルトカバ−層６ｂの幅の総和はベルト層
５の幅の５〜７５％を占める。５％未満であるとロ−ド
ノイズ低減効果が得られない。一方、７５％超であると
ロ−ドノイズ低減効果に影響がない。Here, the end belt cover layers 6a, 6a are disposed so as to cover both end portions of the belt layer 5 in order to eliminate a step of rigidity at both end portions of the belt layer 5. The total width of the end belt cover layers 6a, 6a covering both end portions of the belt layer and the width of the central belt cover layer 6b occupy 5 to 75% of the width of the belt layer 5. If it is less than 5%, the load noise reduction effect cannot be obtained. On the other hand, if it exceeds 75%, the load noise reduction effect is not affected.
【００１２】なお、図１ではベルト層が一層の場合の実
施形態を示したが、ベルト層が二層以上の場合における
上記「ベルト層５の幅の５〜７５％」の「ベルト層」と
は、二層以上のベルト層のうち最大幅のベルト層をい
う。Although FIG. 1 shows an embodiment in which the number of belt layers is one, the "belt layer" of "5 to 75% of the width of the belt layer 5" when there are two or more belt layers. Means a belt layer having the maximum width among two or more belt layers.
【００１３】図２（ａ）及び（ｂ）は本発明の他の実施
形態のトレッド部におけるベルト構造の概要を示す配置
説明図である。図２（ａ）では、カ−カス層２の外側に
二層の幅の異なるベルト層５ａ，５ｂが配置され、ベル
ト層５ａ，５ｂの補強層として下側のベルト層５ｂの両
端部を覆う端部ベルトカバ−層６ａ，６ａと上側のベル
ト層５ａの外側に位置する中央部ベルトカバ−層６ｂが
配置されている。図２（ｂ）では、二層の幅の異なるベ
ルト層５ａ，５ｂの間に中央部ベルトカバ−層６ｂが配
置され、下側のベルト層５ｂの両端部を端部ベルトカバ
−層６ａ，６ａが覆っている。FIGS. 2 (a) and 2 (b) are explanatory views showing the arrangement of a belt structure in a tread portion according to another embodiment of the present invention. In FIG. 2A, two belt layers 5a and 5b having different widths are arranged outside the carcass layer 2, and cover both ends of the lower belt layer 5b as reinforcing layers of the belt layers 5a and 5b. End belt cover layers 6a, 6a and a central belt cover layer 6b located outside the upper belt layer 5a are arranged. In FIG. 2B, a central belt cover layer 6b is disposed between two belt layers 5a and 5b having different widths, and both end portions of the lower belt layer 5b are connected to end belt cover layers 6a and 6a. Covering.
【００１４】中央部ベルトカバ−層６ｂは、ベルト層が
一層の場合にはそのベルト層の中央部に位置するが、ベ
ルト層が二層以上の場合には最大幅ベルト層の中央部に
位置する。The central belt cover layer 6b is located at the center of the belt layer when there is one belt layer, but is located at the center of the maximum width belt layer when there are two or more belt layers. .
【００１５】本発明では、端部ベルトカバ−層６ａ，６
ａと中央部ベルトカバ−層６ｂのうち少なくとも２つを
引っ張り強度が２．０ＧＰａ以上で、弾性率が７０ＧＰ
ａ以上の有機繊維コ−ドで形成する。In the present invention, the end belt cover layers 6a, 6
a and the central belt cover layer 6b have a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa.
It is formed of an organic fiber code of a or more.
【００１６】つぎに、図２（ｃ）及び（ｄ）は本発明の
他の実施形態のトレッド部におけるベルト構造の概要を
示す配置説明図である。これまで説明した実施態様と異
なる点として、中央部ベルトカバ−層６ｂの代わりに全
部のベルト層を覆う全幅ベルトカバ−層７を配置してい
る。Next, FIGS. 2C and 2D are explanatory views showing the arrangement of a belt structure in a tread portion according to another embodiment of the present invention. The difference from the embodiment described above is that a full-width belt cover layer 7 covering all the belt layers is arranged instead of the central belt cover layer 6b.
【００１７】図２（ｃ）では、カ−カス層２の外側に二
層の幅の異なるベルト層５ａ，５ｂを配置し、ベルト層
５ａ，５ｂの補強層として内側のベルト層５ｂの両端部
を覆う端部ベルトカバ−層６ａ，６ａと外側のベルト層
５ａの外側に全幅ベルトカバ−層７を配置している。ま
た、図２（ｄ）では、二層の幅の異なるベルト層５ａ，
５ｂの外側に全幅ベルトカバ−層７を配置し、全幅ベル
トカバ−層７の両端部を外側から端部ベルトカバ−層６
ａ，６ａが覆っている。In FIG. 2C, two belt layers 5a and 5b having different widths are arranged outside the carcass layer 2, and both ends of the inner belt layer 5b are used as reinforcing layers for the belt layers 5a and 5b. A full-width belt cover layer 7 is disposed outside the end belt cover layers 6a, 6a covering the first and second outer belt layers 5a. In FIG. 2D, two belt layers 5a and 5a having different widths are shown.
5b, a full-width belt cover layer 7 is arranged on the outside, and both end portions of the full-width belt cover layer 7 are arranged from the outside to the end belt cover layer 6.
a, 6a are covered.
【００１８】図２（ｃ）及び（ｄ）においては、端部ベ
ルトカバー層６ａ，６ａを引っ張り強度が２．０ＧＰａ
以上で、弾性率が７０ＧＰａ以上の有機繊維コ−ドで形
成すると共に、全幅ベルトカバー層７を引っ張り強度が
２．０ＧＰａ未満で、弾性率が７０ＧＰａ未満の有機繊
維コ−ドで形成している。2C and 2D, the end belt cover layers 6a have a tensile strength of 2.0 GPa.
As described above, the elastic belt is formed of an organic fiber code having an elastic modulus of 70 GPa or more, and the full width belt cover layer 7 is formed of an organic fiber code having a tensile strength of less than 2.0 GPa and an elastic modulus of less than 70 GPa. .
【００１９】ここで、引っ張り強度が２．０ＧＰａ以上
で、弾性率が７０ＧＰａ以上の有機繊維コ−ドは、例え
ば、芳香族ポリアミド繊維コード、ポリパラフェニレン
ベンゾビスオキサゾール繊維コード（ＰＢＯ）、ポリパ
ラフェニレンベンゾビスチアゾール繊維コード（ＰＢ
Ｔ) である。Here, organic fiber cords having a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more include, for example, aromatic polyamide fiber cord, polyparaphenylenebenzobisoxazole fiber cord (PBO), Phenylene benzobisthiazole fiber cord (PB
T).
【００２０】引っ張り強度が２．０ＧＰａ未満で、弾性
率が７０ＧＰａ未満の有機繊維コ−ドは、例えば、ナイ
ロンコード、ビニロンコード、ポリエステルコード、ポ
リオレフィンケトンコードである。Organic fiber cords having a tensile strength of less than 2.0 GPa and an elastic modulus of less than 70 GPa are, for example, nylon cords, vinylon cords, polyester cords, and polyolefin ketone cords.
【００２１】端部ベルトカバー層６ａ，６ａ、中央部ベ
ルトカバ−層６ｂ、全幅ベルトカバ−層７は、それぞ
れ、例えば、有機繊維コ−ドを少なくとも１本以上引き
揃えてゴムを被覆した帯状体（ストリップ）をベルト層
上にタイヤ周方向に実質的に平行になるように螺旋状に
巻き付けることにより形成される。Each of the end belt cover layers 6a, 6a, the central belt cover layer 6b, and the full-width belt cover layer 7 is, for example, a belt-shaped body (at least one or more organic fiber cords are aligned and covered with rubber). Strip) is spirally wound on the belt layer so as to be substantially parallel to the tire circumferential direction.
【００２２】本発明では、ベルト層に使用する材料は限
定されないが、耐久性等を考慮してベルト層をスチ−ル
コ−ドで構成するのがよい。また、ロ−ドノイズのさら
なる低減のために、スチ−ルコ−ドは、１×Ｎ構造であ
って波付けワイヤ（長手方向に波状にくせ付けされたワ
イヤ）からなるのが好ましい（Ｎはスチールコードを構
成するワイヤの本数）。In the present invention, the material used for the belt layer is not limited, but the belt layer is preferably made of steel code in consideration of durability and the like. Further, in order to further reduce the load noise, the steel cord preferably has a 1 × N structure and is composed of a corrugated wire (a wire which is corrugated in a longitudinal direction) (where N is steel). The number of wires that make up the cord).
【００２３】[0023]
【実施例】トレッド部におけるベルト構造の仕様を以下
のように変えて、実施例１〜７及び従来例１〜２の９種
のタイヤ（２０５／６５Ｒ１５）をそれぞれ製造し、各
タイヤについて以下の要領で高速耐久性、ロ−ドノイ
ズ、重量を評価し、その結果を表１に示した。なお、各
タイヤにおいて以下に示す以外の仕様は同一とした。Ｅ
はエンド数を示す。EXAMPLE Nine types of tires (205 / 65R15) of Examples 1 to 7 and Conventional Examples 1 to 2 were manufactured by changing the specifications of the belt structure in the tread portion as follows. The high-speed durability, load noise, and weight were evaluated in the same manner, and the results are shown in Table 1. The specifications other than those shown below were the same for each tire. E
Indicates the number of ends.
【００２４】 〔ベルト構造〕 従来例１（図３に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 全幅ベルトカバー層：幅 160mm,ナイロン66,840D/2,70E 端部ベルトカバー層：幅 30mm,ナイロン66,840D/2,70E 従来例２（図３に示す構造） ベルト層：スチ−ルコ−ド（波付けあり）、１×３×０．２８ＨＴ、３５ Ｅ コ-ト゛ 径 0.60mm,ヒ゜ッチ 13.5mm,,波付ヒ゜ッチ 3.1mm,波付高サ 0.4mm 全幅ベルトカバー層：幅 160mm,ナイロン66,840D/2,70E 端部ベルトカバー層：幅 30mm,ナイロン66,840D/2,70E [Belt Structure] Conventional Example 1 (Structure shown in FIG. 3) Belt layer: steel cord (without corrugation), 1 × 3 × 0.28HT, 35 E flat open structure (long diameter 0.83 mm) , Short diameter 0.60mm, pitch 12.5mm) Full width belt cover layer: width 160mm, nylon 66,840D / 2,70E End belt cover layer: width 30mm, nylon 66,840D / 2,70E Conventional example 2 (structure shown in Fig. 3) ) Belt layer: Steel cord (with corrugation), 1 × 3 × 0.28HT, 35E Coat diameter 0.60mm, pitch 13.5mm, pitch corrugated 3.1mm, corrugated height 0.4mm full width Belt cover layer: width 160mm, nylon 66,840D / 2,70E Edge belt cover layer: width 30mm, nylon 66,840D / 2,70E
【００２５】 実施例１（図１に示す構造） ベルト層：スチ−ルコ−ド（波付けあり）、１×３×０．２８ＨＴ、３５ Ｅ コ-ト゛ 径 0.60mm,ヒ゜ッチ 13.5mm,,波付ヒ゜ッチ 3.1mm,波付高サ 0.4mm 中央部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 端部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 実施例２（図２（ａ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 中央部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 端部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E Example 1 (Structure shown in FIG. 1) Belt layer: steel code (with corrugation), 1 × 3 × 0.28HT, 35 E coat diameter 0.60 mm, switch 13.5 mm, wave Hatch with 3.1 mm, corrugated height 0.4 mm Central belt cover layer: width 15 mm, aramit, 1000D / 2, 60E End belt cover layer: width 15 mm, aramit, 1000D / 2, 60E Example 2 (Fig. 2 ( Structure shown in a)) Belt layer: steel cord (without corrugation), 1 × 3 × 0.28HT, 35E flat open structure (major axis 0.83mm, minor axis 0.60mm, switch 12.5mm) Belt cover layer: width 15mm, aramit ゛, 1000D / 2, 60E End belt cover layer: width 15mm, aramit ミ, 1000D / 2, 60E
【００２６】 実施例３（図２（ａ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 中央部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 一方の端部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 他方の端部ベルトカバー層：幅 30mm,ナイロン66,840D/2,70E 実施例４（図２（ｂ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 中央部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E 端部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E Example 3 (Structure shown in FIG. 2 (a)) Belt layer: steel code (without corrugation), 1 × 3 × 0.28HT, 35E flat open structure (long diameter 0.83mm, Minor diameter 0.60mm, Hitch 12.5mm) Central belt cover layer: width 15mm, aramit, 1000D / 2,60E One end belt cover layer: width 15mm, aramit, 1000D / 2,60E The other end belt cover layer : Width 30 mm, nylon 66,840D / 2,70E Example 4 (structure shown in FIG. 2 (b)) Belt layer: steel code (without corrugation), 1 × 3 × 0.28HT, 35E flat -Pun structure (major axis 0.83mm, minor axis 0.60mm, switch 12.5mm) Central belt cover layer: width 15mm, aramit ゛, 1000D / 2, 60E End belt cover layer: width 15mm, aramite ゛, 1000D / 2, 60E
【００２７】 実施例５（図２（ｃ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 全幅ベルトカバー層：幅 160mm,ナイロン66,840D/2,70E 端部ベルトカバー層：幅 10mm,PBO,1000D/2,50E 実施例６（図２（ｄ）に示す構造） ベルト層：スチ−ルコ−ド（波付けあり）、１×３×０．２８ＨＴ、３５ Ｅ コ-ト゛ 径 0.60mm,ヒ゜ッチ 13.5mm,,波付ヒ゜ッチ 3.1mm,波付高サ 0.4mm 全幅ベルトカバー層：幅 160mm,ナイロン66,840D/2,70E 端部ベルトカバー層：幅 15mm,アラミト゛,1000D/2,60E Example 5 (Structure shown in FIG. 2 (c)) Belt layer: steel code (without corrugation), 1 × 3 × 0.28HT, 35E flat open structure (long diameter 0.83mm, Short diameter 0.60mm, pitch 12.5mm) Full width belt cover layer: width 160mm, nylon 66,840D / 2,70E End belt cover layer: width 10mm, PBO, 1000D / 2,50E Example 6 (See Fig. 2 (d)) Belt layer: steel cord (corrugated), 1 × 3 × 0.28HT, 35E coat diameter 0.60mm, switch 13.5mm, switch with corrugated 3.1mm, height with corrugated 0.4 mm Full width belt cover layer: 160mm wide, nylon 66,840D / 2,70E End belt cover layer: 15mm wide, Aramit ゛, 1000D / 2,60E
【００２８】 実施例７（図２（ｅ）に示す構造） ベルト層：スチールコード（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オープン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm） 中央部ベルトカバー層：幅 30mm,ナイロン66,840D/2,70E 端部ベルトカバー層：幅 15mm,アラミト゛,1000 D/2,60E 実施例８（図２（ｆ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 全幅ベルトカバー層：幅 160mm,ナイロン66,840D/2,70E 端部ベルトカバー層(6a-1)：幅25mm, ナイロン66,840D/2,70E (6a-2)：幅 3mm, PBO, 1000D/2,50E 中央部ベルトカバー層：幅 3mm, PBO, 1000D/2,50E Example 7 (Structure shown in FIG. 2 (e)) Belt layer: steel cord (without corrugation), 1 × 3 × 0.28HT, 35 E flat open structure (major axis: 0.83 mm, minor axis: 0.60 mm, Hitch 12.5mm) Central belt cover layer: width 30mm, nylon 66,840D / 2,70E End belt cover layer: width 15mm, Aramit II, 1000D / 2,60E Example 8 (structure shown in Fig. 2 (f)) Belt layer: steel cord (no corrugation), 1 × 3 × 0.28HT, 35E flat open structure (major axis 0.83mm, minor axis 0.60mm, switch 12.5mm) Full width belt cover layer: width 160mm , Nylon 66,840D / 2,70E end belt cover layer (6a-1): 25mm wide, nylon 66,840D / 2,70E (6a-2): 3mm width, PBO, 1000D / 2,50E central belt cover layer ： Width 3mm, PBO, 1000D / 2,50E
【００２９】 実施例９（図２（ｇ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 端部ベルトカバー層 ：幅30mm, アラミト゛, 1000D/2,60E 中央部ベルトカバー層：幅 60mm,ナイロン66, 840D/2,70E 比較例１（図２（ｈ）に示す構造） ベルト層：スチ−ルコ−ド（波付けなし）、１×３×０．２８ＨＴ、３５ Ｅ 偏平オ−プン構造（長径 0.83mm,短径 0.60mm,ヒ゜ッチ 12.5mm) 端部ベルトカバー層 ：幅30mm, アラミト゛, 1000D/2,60E 中央部ベルトカバー層：幅 70mm,ナイロン66, 840D/2,70E Example 9 (Structure shown in FIG. 2 (g)) Belt layer: steel code (without corrugation), 1 × 3 × 0.28HT, 35 E flat open structure (long diameter 0.83 mm, Minor diameter 0.60mm, pitch 12.5mm) End belt cover layer: width 30mm, aramit, 1000D / 2,60E Central belt cover layer: width 60mm, nylon 66, 840D / 2,70E Comparative example 1 (Fig. 2 (h )) Belt layer: steel cord (without corrugation), 1 × 3 × 0.28HT, 35E flat open structure (major axis 0.83mm, minor axis 0.60mm, pitch 12.5mm) Belt cover layer: Width 30mm, Aramit ゛, 1000D / 2,60E Central belt cover layer: Width 70mm, nylon 66, 840D / 2,70E
【００３０】高速耐久性評価方法：試験タイヤをドラム
径１７０７ｍｍの試験機に装着しJIS - D4230 に規定さ
れる高速耐久性試験を行い、更に３０分毎に１０ｋｍ／
ｈ加速してタイヤが破壊するまでの走行距離を測定し
た。結果は比較タイヤの走行距離を１００とした時の指
数で表した値を耐久性とする。指数値は大きいほうがよ
い。 High-speed durability evaluation method : A test tire was mounted on a testing machine having a drum diameter of 1707 mm, and a high-speed durability test specified in JIS-D4230 was performed.
The running distance until the tire was broken by acceleration was measured. As a result, a value represented by an index when the traveling distance of the comparative tire is set to 100 is defined as durability. The larger the index value, the better.
【００３１】ロ−ドノイズ評価方法：リムサイズ１５×
６ＪＪのリムに空気圧２００ｋＰａで組み込んだ試験タ
イヤを排気量２．５リッターのＦＲ車に装着し、粗い路
面を速度６０ｋｍ／ｈで走行したときの運転席右耳位置
での音圧レベルを測定した。評価結果は従来タイヤを１
００とし、その評価値が大きいほど音圧特性が優れてい
ることを意味する。 Load noise evaluation method : rim size 15 ×
The sound pressure level at the right ear position of the driver's seat was measured when the test tire assembled with a 6JJ rim at an air pressure of 200 kPa was mounted on an FR car with a displacement of 2.5 liters and traveling on a rough road surface at a speed of 60 km / h. . The evaluation result was 1 for the conventional tire.
00 means that the larger the evaluation value is, the better the sound pressure characteristic is.
【００３２】重量評価方法：計量計により各試験タイヤ
の重量を測定し、比較タイヤの重量を１００としたとき
の指数で表した値である。指数値が小さいほど軽い。 Weight evaluation method : The weight of each test tire was measured by a weighing meter, and the value was expressed as an index when the weight of the comparative tire was set to 100. The smaller the index value, the lighter.
【００３３】[0033]
【表１】 [Table 1]
【００３４】表１から明らかなように実施例１〜９（本
発明タイヤ）は従来例１〜２および比較例１に比し、耐
久性を維持しつつ、高周波ロ−ドノイズを低減させると
共に、軽量化していることが判る。As is clear from Table 1, Examples 1 to 9 (tires of the present invention) reduce high-frequency load noise while maintaining durability as compared with Conventional Examples 1 and 2 and Comparative Example 1. It can be seen that the weight has been reduced.
【００３５】[0035]
【発明の効果】以上説明したように、本発明ではベルト
カバ−層に使用するコ−ド材料を高強度・高弾性の有機
繊維コ−ドとして、これを高周波域のロ−ドノイズの発
生源であるベルト層の振動部分に集中的に配置したた
め、ロ−ドノイズを低減させることを可能にすると同時
にコ−ドの使用量が少なくなったため軽量化が可能にな
った。As described above, in the present invention, the cord material used for the belt cover layer is a high-strength and high-elasticity organic fiber cord, which is used as a source of load noise in a high-frequency range. Since it is arranged intensively on the vibration part of a certain belt layer, it is possible to reduce the load noise, and at the same time, it is possible to reduce the weight because the amount of code used is reduced.
【図１】本発明の一実施形態の概要を示すタイヤの子午
線方向断面図である。FIG. 1 is a meridional sectional view of a tire showing an outline of an embodiment of the present invention.
【図２】本発明の他の実施形態を示したもので、（ａ）
〜（ｈ）はそれぞれトレッド部におけるベルト構造の概
要を示す配置説明図である。FIG. 2 shows another embodiment of the present invention, in which (a)
FIGS. 1H to 1H are layout explanatory diagrams each showing an outline of a belt structure in a tread portion.
【図３】従来タイヤの概要を示すタイヤの子午線方向断
面図である。FIG. 3 is a meridional section of a tire showing an outline of a conventional tire.
１ ビ−ド部 ２ カ−カス層 ３ トレッド部 ４ サイドウオ−ル部 ５ ベルト層 ５ａ 外側のベルト層 ５ｂ 内側のベルト層 ６ａ 端部ベルトカバ−層 ６ｂ 中央部ベルトカバ−層 ７ 全幅ベルトカバ−層 DESCRIPTION OF SYMBOLS 1 Bead part 2 Carcass layer 3 Tread part 4 Side wall part 5 Belt layer 5a Outer belt layer 5b Inner belt layer 6a End belt cover layer 6b Central belt cover layer 7 Full width belt cover layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６０Ｃ 9/20 Ｂ６０Ｃ 9/20 Ｂ (72)発明者 由良 出 神奈川県平塚市追分２番１号 横浜ゴム株 式会社平塚製造所内──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B60C 9/20 B60C 9/20 B (72) Inventor Yura Departure No. 2-1, Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Hiratsuka Factory
Claims (7)
少なくとも一層のベルト層を設け、いずれかのベルト層
の外側にベルトカバ−層を配置した空気入りラジアルタ
イヤにおいて、前記ベルトカバー層をベルト層の幅方向
端部を覆う端部ベルトカバー層と最大幅ベルト層の中央
部に位置する中央部ベルトカバ−層とで構成し、これら
の端部ベルトカバー層と中央部ベルトカバ−層のうち少
なくとも２つを引っ張り強度が２．０ＧＰａ以上で、弾
性率が７０ＧＰａ以上の有機繊維コ−ドで形成した空気
入りラジアルタイヤ。1. A pneumatic radial tire in which at least one belt layer is provided outside a carcass layer in a tread portion and a belt cover layer is provided outside one of the belt layers, the belt cover layer is formed as a belt layer. And a central belt cover layer positioned at the center of the maximum width belt layer, and at least two of the end belt cover layer and the central belt cover layer. A pneumatic radial tire formed of an organic fiber cord having a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more.
少なくとも一層のベルト層を設け、いずれかのベルト層
の外側にベルトカバ−層を配置した空気入りラジアルタ
イヤにおいて、前記ベルトカバー層をベルト層の幅方向
端部を覆う端部ベルトカバー層と全部のベルト層を覆う
全幅ベルトカバー層とで構成し、前記端部ベルトカバー
層を引っ張り強度が２．０ＧＰａ以上で、弾性率が７０
ＧＰａ以上の有機繊維コ−ドで形成すると共に、前記全
幅ベルトカバー層を引っ張り強度が２．０ＧＰａ未満
で、弾性率が７０ＧＰａ未満の有機繊維コ−ドで形成し
た空気入りラジアルタイヤ。2. A pneumatic radial tire in which at least one belt layer is provided outside a carcass layer in a tread portion, and a belt cover layer is provided outside one of the belt layers, the belt cover layer is formed of a belt layer. And a full-width belt cover layer covering all the belt layers. The end belt cover layer has a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more.
A pneumatic radial tire formed of an organic fiber code having GPa or more, and wherein the full-width belt cover layer is formed of an organic fiber code having a tensile strength of less than 2.0 GPa and an elastic modulus of less than 70 GPa.
部ベルトカバ−層の総幅との総和が、最大幅ベルト層の
幅の５〜７５％を占める請求項１記載の空気入りラジア
ルタイヤ。3. The pneumatic radial tire according to claim 1, wherein the sum of the width of the central belt cover layer and the total width of the end belt cover layers occupies 5 to 75% of the width of the maximum width belt layer. .
で、弾性率が７０ＧＰａ以上の有機繊維コ−ドが、芳香
族ポリアミド繊維コード、ポリパラフェニレンベンゾビ
スオキサゾール繊維コード、ポリパラフェニレンベンゾ
ビスチアゾール繊維から選ばれるコードである請求項
１、２又は３記載の空気入りラジアルタイヤ。4. An organic fiber cord having a tensile strength of 2.0 GPa or more and an elastic modulus of 70 GPa or more is an aromatic polyamide fiber cord, a polyparaphenylene benzobisoxazole fiber cord, or a polyparaphenylene benzobisthiazole fiber. The pneumatic radial tire according to claim 1, 2 or 3, which is a cord selected from the group consisting of:
で、弾性率が７０ＧＰａ未満の有機繊維コ−ドが、ナイ
ロンコード、ビニロンコード、ポリエステルコード、ポ
リオレフィンケトンコードから選ばれるコードである請
求項２記載の空気入りラジアルタイヤ。5. The organic fiber cord having a tensile strength of less than 2.0 GPa and an elastic modulus of less than 70 GPa is a cord selected from a nylon cord, a vinylon cord, a polyester cord and a polyolefin ketone cord. Pneumatic radial tire.
請求項１乃至５の何れか１項記載の空気入りラジアルタ
イヤ。6. The pneumatic radial tire according to claim 1, wherein the belt layer is made of steel code.
て波付けワイヤからなる請求項６記載の空気入りラジア
ルタイヤ。7. The pneumatic radial tire according to claim 6, wherein the steel code has a 1 × N structure and is formed of a corrugated wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001114275A JP4635366B2 (en) | 2001-04-12 | 2001-04-12 | Pneumatic radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001114275A JP4635366B2 (en) | 2001-04-12 | 2001-04-12 | Pneumatic radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002307910A true JP2002307910A (en) | 2002-10-23 |
| JP4635366B2 JP4635366B2 (en) | 2011-02-23 |
Family
ID=18965372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001114275A Expired - Fee Related JP4635366B2 (en) | 2001-04-12 | 2001-04-12 | Pneumatic radial tire |
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| Country | Link |
|---|---|
| JP (1) | JP4635366B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151336A (en) * | 2004-12-01 | 2006-06-15 | Yokohama Rubber Co Ltd:The | Pneumatic tire for heavy load |
| JP2007168554A (en) * | 2005-12-21 | 2007-07-05 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2008001248A (en) * | 2006-06-23 | 2008-01-10 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2008514475A (en) * | 2004-09-24 | 2008-05-08 | ソシエテ ド テクノロジー ミシュラン | Tire having a plurality of zones with crowns having circumferential reinforcing cords |
| JP2009035030A (en) * | 2007-07-31 | 2009-02-19 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2009166617A (en) * | 2008-01-15 | 2009-07-30 | Honda Motor Co Ltd | Radial tire for vehicle |
| JP2010173612A (en) * | 2009-02-02 | 2010-08-12 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2010179689A (en) * | 2009-02-03 | 2010-08-19 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2011051445A (en) * | 2009-09-01 | 2011-03-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2012025275A (en) * | 2010-07-23 | 2012-02-09 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| EP3064376A4 (en) * | 2013-10-29 | 2016-11-09 | Bridgestone Corp | Tire |
| CN107351606A (en) * | 2016-05-10 | 2017-11-17 | 韩国轮胎株式会社 | Pneumatic tire with double reinforcement band structures |
| CN112638664A (en) * | 2018-09-06 | 2021-04-09 | 横滨橡胶株式会社 | Pneumatic tire and method for manufacturing pneumatic tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7135990B2 (en) | 2019-04-24 | 2022-09-13 | 横浜ゴム株式会社 | Method for manufacturing pneumatic tires |
| JP7381869B2 (en) | 2019-12-18 | 2023-11-16 | 横浜ゴム株式会社 | Pneumatic tires and pneumatic tire manufacturing methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000203212A (en) * | 1999-01-12 | 2000-07-25 | Bridgestone Corp | Radial tire |
| JP2002137606A (en) * | 2000-11-01 | 2002-05-14 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04154404A (en) * | 1990-10-18 | 1992-05-27 | Toyo Tire & Rubber Co Ltd | Radial tire having belt reinforcement layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000203212A (en) * | 1999-01-12 | 2000-07-25 | Bridgestone Corp | Radial tire |
| JP2002137606A (en) * | 2000-11-01 | 2002-05-14 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
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| JP2008514475A (en) * | 2004-09-24 | 2008-05-08 | ソシエテ ド テクノロジー ミシュラン | Tire having a plurality of zones with crowns having circumferential reinforcing cords |
| JP2006151336A (en) * | 2004-12-01 | 2006-06-15 | Yokohama Rubber Co Ltd:The | Pneumatic tire for heavy load |
| JP4586518B2 (en) * | 2004-12-01 | 2010-11-24 | 横浜ゴム株式会社 | Heavy duty pneumatic tire |
| US7823615B2 (en) | 2005-12-21 | 2010-11-02 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| JP2007168554A (en) * | 2005-12-21 | 2007-07-05 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2008001248A (en) * | 2006-06-23 | 2008-01-10 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2009035030A (en) * | 2007-07-31 | 2009-02-19 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2009166617A (en) * | 2008-01-15 | 2009-07-30 | Honda Motor Co Ltd | Radial tire for vehicle |
| JP2010173612A (en) * | 2009-02-02 | 2010-08-12 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2010179689A (en) * | 2009-02-03 | 2010-08-19 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2011051445A (en) * | 2009-09-01 | 2011-03-17 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2012025275A (en) * | 2010-07-23 | 2012-02-09 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| EP3064376A4 (en) * | 2013-10-29 | 2016-11-09 | Bridgestone Corp | Tire |
| JPWO2015063977A1 (en) * | 2013-10-29 | 2017-03-09 | 株式会社ブリヂストン | tire |
| US10556466B2 (en) | 2013-10-29 | 2020-02-11 | Bridgestone Corporation | Tire |
| CN107351606A (en) * | 2016-05-10 | 2017-11-17 | 韩国轮胎株式会社 | Pneumatic tire with double reinforcement band structures |
| EP3246179A1 (en) * | 2016-05-10 | 2017-11-22 | Hankook Tire Co., Ltd. | Pneumatic tire having structure of dual reinforcement belt layer |
| CN112638664A (en) * | 2018-09-06 | 2021-04-09 | 横滨橡胶株式会社 | Pneumatic tire and method for manufacturing pneumatic tire |
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