JPH092024A - High maneuverability pneumatic tire having directional slant block - Google Patents

High maneuverability pneumatic tire having directional slant block

Info

Publication number
JPH092024A
JPH092024A JP7152079A JP15207995A JPH092024A JP H092024 A JPH092024 A JP H092024A JP 7152079 A JP7152079 A JP 7152079A JP 15207995 A JP15207995 A JP 15207995A JP H092024 A JPH092024 A JP H092024A
Authority
JP
Japan
Prior art keywords
block
tread
height
wide
circumferential rib
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
Application number
JP7152079A
Other languages
Japanese (ja)
Other versions
JP3590137B2 (en
Inventor
Yasuo Himuro
泰雄 氷室
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP15207995A priority Critical patent/JP3590137B2/en
Publication of JPH092024A publication Critical patent/JPH092024A/en
Application granted granted Critical
Publication of JP3590137B2 publication Critical patent/JP3590137B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
    • 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
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane

Landscapes

  • Tires In General (AREA)

Abstract

PURPOSE: To provide a tread pattern of excellent control stability on a wet road surface and hydroplaning characteristic in a high maneuverability tire applicable even to sport running. CONSTITUTION: This high maneuverability pneumatic tire is provided with a rib 1 in the center circumferential direction provided on a pattern center, many directional slant grooves 4 extending slantingly to the circumferential direction up to right and left tread ends, and directional slant blocks 2, 3 extending slantingly to the circumferential direction. In a tread territory inside the positions of about 40-70% of the distance from the pattern center to tread ends, the center lines of the blocks 2, 3 are extended at low angles of about 20-40 degrees against the circumferential direction, in the outside territories up to both ends of the tread, they are extended slantingly at high angles of about 60-70 degrees, and outside blocks of which the width in the circumferential direction is small in the inside territory and wide in the outside territory, and inside blocks of which the width is narrow in the outside territory and wide in the inside territory are alternately arranged.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は乗用車用空気入りタイヤ
に関するもので、特に、スポーツ走行にも対応できる運
動性能を重視した乗用車用高運動性能空気入りタイヤに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire for a passenger car, and more particularly to a pneumatic tire for a passenger car having a high exercise performance which emphasizes exercise performance capable of supporting sports driving.

【０００２】[0002]

【従来の技術】高運動性能乗用車用空気入りタイヤのト
レッド・パターンの典型的な従来例を図４に示す。従来
のタイヤは、図示のように、数本（図示の例では４本、
一般的には２乃至８本程度）の周方向溝と、周方向に間
隔を置いて配置された多数の方向性傾斜溝と、周方向に
間隔を置いて配置された多数の方向性傾斜ブロックより
なるトレッド・パターンを備えている。本明細書におい
て、「周方向溝」とは、周方向に連続して延びる溝を意
味し、「周方向リブ」とは、周方向に連続して延びるリ
ブを意味し、「方向性傾斜溝」とは、周方向に対して傾
斜して延びる溝であって、タイヤの正転時に、該溝の傾
斜して延びる部分のタイヤ赤道面に近い側が先に接地し
て、赤道面に遠い側が後に接地するように車両に装着す
る際のタイヤの回転方向が指定されている、いわゆる方
向性トレッド・パターンが形成される溝を意味し、「方
向性傾斜ブロック」とは、該方向性傾斜溝によって形成
される、周方向に対して傾斜して延びるブロックであっ
て、タイヤの正転時に、該ブロックの傾斜して延びる部
分のタイヤ赤道面に近い側が先に接地して、赤道面に遠
い側が後に接地するように車両に装着する際のタイヤの
回転方向が指定されている、いわゆる方向性トレッド・
パターンが形成されるブロックを意味する。2. Description of the Related Art FIG. 4 shows a typical conventional tread pattern of a pneumatic tire for a high-performance passenger car. As shown in the figure, the conventional tire has several tires (four tires in the illustrated example,
(Generally about 2 to 8) circumferential grooves, a number of circumferentially spaced directional tilted grooves, and a number of circumferentially spaced directional tilted blocks. It has a tread pattern. In the present specification, the “circumferential groove” means a groove continuously extending in the circumferential direction, the “circumferential rib” means a rib continuously extending in the circumferential direction, and the “directional inclined groove”. ”Is a groove that extends obliquely with respect to the circumferential direction, and when the tire rotates in the normal direction, the side of the groove that extends obliquely near the tire equatorial plane contacts the ground first, and the side far from the equatorial plane is It means a groove in which a so-called directional tread pattern is formed, in which the direction of rotation of the tire when it is mounted on the vehicle is designated so as to be grounded later, and the "directional tilt block" means the directional tilt groove. A block extending obliquely with respect to the circumferential direction, the side of the part of the block extending obliquely closer to the tire equatorial plane comes in contact with the tire at the time of normal rotation, and is far from the equatorial plane. Turn the tire when installing it in the vehicle so that the side touches the ground later. Direction is specified, a so-called directional tread,
It means a block on which a pattern is formed.

【０００３】上記のような従来のタイヤでウエット路面
での操縦安定性やハイドロ・プレーニング特性を高める
ためには、溝本数や溝幅を増やしてネガティブ比率（ト
レッド接地面の面積に対する溝表面の面積の割合）を増
加させること、特に、方向性傾斜溝のネガティブ比率を
高めることが効果的であって、頻繁に採用される設計手
法である。しかしながら、この手法で設計されたウエッ
ト性能に優れた方向性トレッド・パターンを備えた空気
入りタイヤでは、耐偏摩耗性能やドライ路面上での操縦
安定性能が低下する。逆に、上記のような従来のタイヤ
で耐偏摩耗性能やドライ路面上での操縦安定性能を確保
しようとすると、ウエット路面での操縦安定性やハイド
ロ・プレーニング特性を高めることが困難であった。In order to improve steering stability and hydroplaning characteristics on a wet road surface in the conventional tire as described above, the number of grooves and the groove width are increased to increase the negative ratio (area of the groove surface with respect to the area of the tread contact surface). It is effective to increase the ratio), and in particular, to increase the negative ratio of the directional tilted groove, which is a frequently adopted design method. However, in a pneumatic tire having a directional tread pattern excellent in wet performance designed by this method, uneven wear resistance performance and steering stability performance on dry road surface are deteriorated. On the contrary, when trying to secure the uneven wear resistance performance and the steering stability performance on the dry road surface with the conventional tire as described above, it was difficult to enhance the steering stability on the wet road surface and the hydro planing characteristics. .

【０００４】[0004]

【発明が解決しようとする課題】本発明の目的は、スポ
ーツ走行にも対応できる運動性能を重視した高運動性能
タイヤであって、しかも耐偏摩耗性能やドライ路面上で
の操縦安定性能を低下することなく、ウエット路面での
操縦安定性やハイドロ・プレーニング特性の優れた、乗
用車用空気入りタイヤに用いられる新規なトレッド・パ
ターンを提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a high athletic performance tire which emphasizes athletic performance capable of supporting sports running as well, and has reduced uneven wear resistance and steering stability on dry road surfaces. It is an object of the present invention to provide a novel tread pattern used for pneumatic tires for passenger cars, which has excellent steering stability on wet road surfaces and hydro-planing characteristics, without the need to do so.

【０００５】[0005]

【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、本発明の空気入りタイヤは、パターン・センター
に設けられた中央周方向リブと、該中央周方向リブから
左右のトレッド端まで周方向に対して傾斜して延び、周
方向に間隔を置いて設けられた多数の方向性傾斜ブロッ
クとを備えた方向性トレッド・パターンを有する空気入
りタイヤにおいて、（１）該方向性傾斜ブロックは、パ
ターン・センターからトレッド端までの距離のおよそ４
０乃至７０％の位置から内側のトレッド内側領域では、
ブロック中心線が周方向に対して２０乃至４０程度度の
低い角度で傾斜して延び、パターン・センターからトレ
ッド端までの距離のおよそ４０乃至７０％の位置からト
レッド両端までのトレッド外側領域では、ブロック中心
線が周方向に対して６０乃至７０度程度の高い角度で傾
斜して延び、（２）該方向性傾斜ブロックは、周方向の
幅が該トレッド内側領域で狭く、該トレッド外側領域で
広い外側広幅ブロックと、周方向の幅が該トレッド外側
領域で狭く、該トレッド内側領域で広い内側広幅ブロッ
クとで構成され、（３）該外側広幅ブロックと該内側広
幅ブロックとが周方向に交互に配置されていることを特
徴とするトレッド・パターンを備えた空気入りタイヤで
あり、該方向性傾斜ブロックの狭幅部の周方向の幅が、
広幅部の周方向の幅の１５乃至４５％であることが好ま
しい。In order to achieve the above object, a pneumatic tire of the present invention is provided with a central circumferential rib provided in a pattern center and from the central circumferential rib to left and right tread ends. A pneumatic tire having a directional tread pattern, comprising a plurality of directional tilt blocks extending in a circumferential direction at an interval and provided at intervals in the circumferential direction, wherein: (1) the directional tilt block; Is about 4 the distance from the pattern center to the tread edge
In the inner tread area from the position of 0 to 70%,
The block center line extends at a low angle of about 20 to 40 degrees with respect to the circumferential direction, and in the tread outer region from the position of about 40 to 70% of the distance from the pattern center to the tread ends to the tread outer ends, The block center line extends at a high angle of about 60 to 70 degrees with respect to the circumferential direction, and (2) the directional tilted block has a circumferential width that is narrow in the tread inner region and in the tread outer region. It is composed of a wide outer wide block and an inner wide block whose circumferential width is narrow in the tread outer region and wide in the tread inner region. (3) The outer wide block and the inner wide block alternate in the circumferential direction. Is a pneumatic tire having a tread pattern, characterized in that the width of the narrow portion of the directional tilt block in the circumferential direction is
It is preferably 15 to 45% of the width of the wide portion in the circumferential direction.

【０００６】上記の目的を達成するために、本発明の乗
用車用空気入りタイヤのトレッド・パターンでは、該外
側広幅ブロックのブロック高さが、該トレッド外側領域
で該中央周方向リブと同じ高さで、該トレッド内側領域
で該中央周方向リブの高さの０乃至２０％であって、該
内側広幅ブロックのブロック高さが、該トレッド内側領
域で該中央周方向リブと同じ高さで、該トレッド外側領
域で該中央周方向リブの高さの０乃至２０％であること
が好ましい。To achieve the above object, in the tread pattern of the pneumatic tire for passenger cars of the present invention, the block height of the outer wide block has the same height as the central circumferential rib in the outer region of the tread. At 0 to 20% of the height of the central circumferential rib in the tread inner region, and the block height of the inner wide block is the same as the central circumferential rib in the tread inner region, It is preferable that the height of the central circumferential rib in the outer region of the tread is 0 to 20%.

【０００７】上記の目的を達成するために、本発明の乗
用車用空気入りタイヤのトレッド・パターンは、該方向
性傾斜ブロックの高さが、パターン・センターからトレ
ッド端までの距離のおよそ４０乃至７０％の位置で、該
中央周方向リブと同じ高さから該中央周方向リブの高さ
の０乃至２０％まで徐々に変化することが好ましく、ま
た、該外側広幅ブロックと該内側広幅ブロックとが同じ
位置で逆方向にブロックの高さを変化することによっ
て、周方向に連続する周方向溝を形成することが好まし
い。In order to achieve the above object, the tread pattern of the pneumatic tire for passenger cars according to the present invention is such that the height of the directional inclined block is approximately 40 to 70 which is the distance from the pattern center to the tread edge. %, It is preferable to gradually change from the same height as the central circumferential rib to 0 to 20% of the height of the central circumferential rib, and the outer wide block and the inner wide block may be changed. It is preferable to form a circumferential groove that is continuous in the circumferential direction by changing the height of the block in the opposite direction at the same position.

【０００８】上記の目的を達成するために、本発明の乗
用車用空気入りタイヤのトレッド・パターンは、該外側
広幅ブロックのブロック高さが該中央周方向リブの近傍
で該中央周方向リブと同じ高さで、該内側広幅ブロック
のブロック高さが該中央周方向リブの近傍で該中央周方
向リブの高さの０乃至２０％であることが好ましい。In order to achieve the above object, the tread pattern of the pneumatic tire for passenger cars of the present invention is such that the block height of the outer wide block is the same as the central circumferential rib in the vicinity of the central circumferential rib. In terms of height, the block height of the inner wide block is preferably 0 to 20% of the height of the central circumferential rib near the central circumferential rib.

【０００９】上記の目的を達成するために、本発明の乗
用車用空気入りタイヤのトレッド・パターンは、（１）
該方向性傾斜ブロックの一部が、該周方向リブの周方向
連続性を損なうことなしに、該周方向リブに食い込むよ
うに配置され、（２）該方向性傾斜ブロックの該周方向
リブに食い込んでいる先端隅部は先細鋭角形状であり、
（３）該方向性傾斜ブロックの少なくとも該周方向リブ
に食い込んでいる先端隅部のブロック高さが、該周方向
リブに食い込むにしたがい徐々に低くなり、該周方向リ
ブの高さの０乃至２０％で終端することが好ましい。In order to achieve the above object, the tread pattern of the pneumatic tire for passenger cars of the present invention is (1)
A part of the directional inclined block is arranged so as to bite into the circumferential rib without impairing the circumferential continuity of the circumferential rib, and (2) the circumferential rib of the directional inclined block. The tip corner part that bites is a tapered acute angle shape,
(3) The block height of the tip corner portion that bites into at least the circumferential rib of the directional inclined block gradually decreases as it goes into the circumferential rib, and the height of the circumferential rib ranges from 0 to 0. It is preferable to terminate at 20%.

【００１０】[0010]

【作用】本発明の乗用車用空気入りタイヤでは、方向性
傾斜ブロックが、トレッド内側領域ではブロック中心線
が周方向に対して２０乃至４０程度度の低い角度で傾斜
して延び、トレッド外側領域ではブロック中心線が周方
向に対して６０乃至７０度程度の高い角度で傾斜して延
びていて、換言すれば、これらのブロックを形成する多
数の方向性傾斜溝が周方向に間隔を置いて設けられてい
て、それらの溝がトレッド内側領域では周方向に対して
２０乃至４０度程度の低い角度で傾斜して延び、トレッ
ド外側領域では周方向に対して６０乃至７０度程度の高
い角度で傾斜して延びているので、前後方向の排水性能
にも横方向の排水性能にも優れたタイヤである。特に、
トレッド内側領域の方向性低傾斜溝が接地面中央部の前
後方向の排水性能に寄与し、トレッド外側領域の方向性
高傾斜溝が横方向の排水性能にに寄与するとともに、方
向性高傾斜溝によって形成される方向性高傾斜ブロック
が横剛性を高め操縦安定性能向上に寄与する。しかし、
トレッド内側領域が方向性低傾斜溝だけで構成されたパ
ターンは十分なブロック剛性を確保しにくいので操縦安
定性能に難点が生じる。本発明の乗用車用空気入りタイ
ヤでは、上記のように湾曲した方向性傾斜溝とパターン
・センターに設けられた中央周方向リブとでパターンが
構成されているので、この周方向リブによってトレッド
・パターンに剛性が付与され、微小舵角時のハンドル手
応えが強くなり、ドライバーに与えるいわゆる”しっか
り感”が高まり、直進安定性が向上する。この周方向リ
ブは、通常は、トレッド中央部のタイヤ赤道線上に設け
られた、いわゆるセンター・リブを指すが、左右非対称
トレッド・パターンの場合にはトレッド幅の１／３程度
まで片寄って周方向リブを設けることも可能で、けだ
し、「パターン・センターに設けられた中央周方向リ
ブ」と表現される所以である。さらに、トレッド中央部
に２本の周方向リブを設け、いわゆるセンター・グルー
ブとすることも可能である。In the pneumatic tire for passenger cars of the present invention, the directional inclined block extends in the tread inner region with the block center line inclined at a low angle of about 20 to 40 degrees with respect to the circumferential direction, and in the tread outer region. The block center line extends obliquely at an angle of about 60 to 70 degrees with respect to the circumferential direction. In other words, a large number of directional inclined grooves forming these blocks are provided at intervals in the circumferential direction. The grooves extend at a low angle of about 20 to 40 degrees with respect to the circumferential direction in the tread inner region, and extend at a high angle of about 60 to 70 degrees with respect to the circumferential direction in the tread outer region. Since it is extended, the tire has excellent drainage performance in the front-rear direction and drainage performance in the lateral direction. Especially,
The directional low-sloping groove in the tread inner area contributes to the drainage performance in the front-rear direction at the center of the grounding surface, and the directional high-sloping groove in the tread outer area contributes to the lateral drainage performance. The directional high-inclination block formed by this enhances lateral rigidity and contributes to improved steering stability performance. But,
The pattern in which the inner area of the tread is composed of only the directional low-inclination groove makes it difficult to secure sufficient block rigidity, which causes difficulty in steering stability. In the pneumatic tire for passenger cars of the present invention, since the pattern is constituted by the directional inclined groove curved as described above and the central circumferential rib provided in the pattern center, the tread pattern is formed by the circumferential rib. Rigidity is added to the steering wheel, and the steering feel at the time of a small steering angle is enhanced, so-called "firm feeling" given to the driver is enhanced, and straight running stability is improved. The circumferential rib usually refers to a so-called center rib provided on the tire equatorial line in the center of the tread, but in the case of a left-right asymmetric tread pattern, it is offset to about 1/3 of the tread width in the circumferential direction. It is also possible to provide ribs, which is the reason why the ribs are expressed as "a central circumferential rib provided at the pattern center". Further, it is possible to provide two circumferential ribs at the center of the tread to form a so-called center groove.

【００１１】本発明の乗用車用空気入りタイヤでは、
（１）上記のように、方向性傾斜ブロックが、トレッド
内側領域ではブロック中心線が周方向に対して２０乃至
４０程度度の低い角度で傾斜して延び、トレッド外側領
域ではブロック中心線が周方向に対して６０乃至７０度
程度の高い角度で傾斜して延びていて、（２）方向性傾
斜ブロックは、周方向の幅がトレッド内側領域で狭く、
トレッド外側領域で広い外側広幅ブロックと、周方向の
幅が該トレッド外側領域で狭く、トレッド内側領域で広
い内側広幅ブロックとで構成され、好ましくは、狭幅部
の周方向の幅が広幅部の周方向の幅の１５乃至４５％
で、（３）該外側広幅ブロックと該内側広幅ブロックと
が周方向に交互に配置されているので、操縦安定性能を
確保しながらウエット排水性能を向上することが可能と
なる。方向性傾斜ブロックの狭幅部の周方向の幅が広幅
部の周方向の幅の１５％より小さくなるとウエット排水
性能が低下し、４５％より大きくなると有効接地面積が
不足し操縦安定性能を確保することが難しくなる。In the pneumatic tire for passenger cars of the present invention,
(1) As described above, the directional slanted block extends in the tread inner region with the block centerline slanting at a low angle of about 20 to 40 degrees with respect to the circumferential direction, and in the tread outer region the block centerline surrounds. (2) The directional tilted block has a narrow width in the circumferential direction in the tread inner region, and extends at a high angle of about 60 to 70 degrees with respect to the direction.
An outer wide block that is wide in the tread outer region, and an inner wide block whose width in the circumferential direction is narrow in the tread outer region and is wide in the tread inner region, and preferably, the circumferential width of the narrow portion is the wide portion. 15 to 45% of circumferential width
(3) Since the outer wide blocks and the inner wide blocks are alternately arranged in the circumferential direction, the wet drainage performance can be improved while ensuring the steering stability performance. If the circumferential width of the narrow portion of the directional tilt block is smaller than 15% of the circumferential width of the wide portion, wet drainage performance will be reduced, and if it is larger than 45%, the effective grounding area will be insufficient to secure steering stability performance. Becomes difficult to do.

【００１２】本発明の乗用車用空気入りタイヤでは、外
側広幅ブロックのブロック高さが、該トレッド外側領域
で中央周方向リブと同じ高さで、トレッド内側領域で中
央周方向リブの高さの０乃至２０％であって、内側広幅
ブロックのブロック高さが、トレッド内側領域で中央周
方向リブと同じ高さで、トレッド外側領域で中央周方向
リブの高さの０乃至２０％であり、これらの方向性傾斜
ブロックの高さが、パターン・センターからトレッド端
までの距離のおよそ４０乃至７０％の位置で、中央周方
向リブと同じ高さから中央周方向リブの高さの０乃至２
０％まで徐々に変化するので、操縦安定性能と耐偏摩耗
性能を確保しながらウエット排水性能を向上することが
可能となる。方向性傾斜ブロックの周方向の幅が急に狭
くなり、ブロック剛性が急に低下する個所で偏摩耗が発
生しやすいが、本発明のタイヤではブロックの高さが徐
々に変化するので、耐偏摩耗性能確保に寄与する。ま
た、外側広幅ブロックと内側広幅ブロックとが同じ位置
で逆方向にブロックの高さを変化することによって、周
方向に連続する周方向溝を形成するので、排水性能の向
上に寄与する。In the pneumatic tire for passenger cars according to the present invention, the block height of the outer wide block is the same as that of the central circumferential rib in the outer region of the tread, and the height of the central circumferential rib is 0 in the inner region of the tread. The height of the inner wide block is the same as the central circumferential rib in the tread inner area and 0 to 20% of the height of the central circumferential rib in the tread outer area. The height of the directional tilt block is about 40 to 70% of the distance from the pattern center to the tread edge, and the height is the same as that of the central circumferential rib to 0 to 2 of the height of the central circumferential rib.
Since it gradually changes to 0%, it becomes possible to improve wet drainage performance while ensuring steering stability and uneven wear resistance. The circumferential width of the directional inclined block suddenly narrows, and uneven wear is apt to occur at a portion where the block rigidity suddenly decreases. Contributes to ensuring wear performance. Further, since the outer wide block and the inner wide block change the height of the blocks at the same position in the opposite directions to form circumferential grooves continuous in the circumferential direction, this contributes to improvement of drainage performance.

【００１３】本発明の乗用車用空気入りタイヤでは、パ
ターン・センターからトレッド端までの距離のおよそ４
０乃至７０％の位置で方向性傾斜ブロックのブロック高
さが変化し、トレッド内側領域とトレッド外側領域との
ブロック幅をほぼ均等にしているので、トレッド全体の
剛性バランスが保たれている。本発明の乗用車用空気入
りタイヤは、方向性傾斜ブロックの周方向リブに食い込
んでいる先端隅部は先細鋭角形状であるので、水膜への
接地抵抗が減少して、排水性能に優れたタイヤが得られ
る。しかし、内側広幅ブロックの先端部が鋭角を形成す
ると、この先端鋭角部で偏摩耗が発生しやすい。本発明
のタイヤでは、内側広幅ブロックのブロック高さを中央
周方向リブの近傍で徐々に変化させて、剛性が急に低下
することによる偏摩耗発生を防止または抑制している。In the pneumatic tire for passenger cars of the present invention, the distance from the pattern center to the tread edge is approximately 4 mm.
The block height of the directional inclined block changes at a position of 0 to 70% and the block widths of the tread inner region and the tread outer region are made substantially equal, so that the rigidity balance of the entire tread is maintained. In the pneumatic tire for passenger cars of the present invention, the tip corner biting into the circumferential rib of the directional tilt block has a tapered acute angle shape, so the ground resistance to the water film is reduced, and the tire is excellent in drainage performance. Is obtained. However, if the tip portion of the inner wide block forms an acute angle, uneven wear is likely to occur at the tip acute angle portion. In the tire of the present invention, the block height of the inner wide block is gradually changed in the vicinity of the central circumferential rib to prevent or suppress the occurrence of uneven wear due to a sudden decrease in rigidity.

【００１４】[0014]

【実施例】本発明に従う実施例について図面を参照して
説明すると、図１は本発明に従う乗用車用空気入りタイ
ヤの実施例１のトレッド・パターンであって、図２はＡ
−Ａ断面図、図３はＢ−Ｂ断面図で、タイヤ・サイズは
２２５／５０Ｒ１６で、トレッド幅ＴＷは２００ｍｍで
ある。図１に示す実施例１の空気入りタイヤは、パター
ン・センターであるタイヤ赤道線Ｅ上に設けられた中央
周方向リブ１と、中央周方向リブ１から左右のトレッド
端ＴＥまで周方向に対して傾斜して延びる多数の方向性
傾斜ブロック２、３とを備えていて、タイヤ回転方向Ｒ
が指定されている。方向性傾斜ブロック２、３は、パタ
ーン・センターからトレッド端までの距離ＴＤのおよそ
４０乃至７０％の位置から内側のトレッド内側領域で
は、ブロック中心線が周方向に対して２５度の低い角度
θ1 で傾斜して延び、パターン・センターからトレッド
端までの距離ＴＤのおよそ４０乃至７０％の位置からト
レッド両端までのトレッド外側領域では、ブロック中心
線が周方向に対して６０度の高い角度θ2 で傾斜して延
びている。方向性傾斜ブロック２、３は、周方向の幅が
トレッド内側領域で狭く、トレッド外側領域で広い外側
広幅ブロック２と、周方向の幅がトレッド外側領域で狭
く、トレッド内側領域で広い内側広幅ブロック３とで構
成されていて、外側広幅ブロック２と内側広幅ブロック
３とが周方向に交互に配置されている。方向性傾斜ブロ
ック２、３の狭幅部の周方向の幅が５ｍｍで、広幅部の
周方向の幅が２７ｍｍであり、前者が後者の１９％であ
る。方向性傾斜ブロック３が中央周方向リブ１に食い込
んでいて、その先端隅部は角度θ3 が３５度の先細鋭角
形状である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a tread pattern of Embodiment 1 of a pneumatic tire for passenger cars according to the present invention, and FIG.
-A sectional view and FIG. 3 are BB sectional views, the tire size is 225 / 50R16, and the tread width TW is 200 mm. The pneumatic tire of Example 1 shown in FIG. 1 has a central circumferential rib 1 provided on the tire equator E, which is a pattern center, and a circumferential direction from the central circumferential rib 1 to the left and right tread ends TE. And a plurality of directional tilt blocks 2 and 3 extending in a tilted manner.
Is specified. The directional inclination blocks 2 and 3 have a low center block angle θ1 of 25 degrees with respect to the circumferential direction in the tread inner area inside about 40 to 70% of the distance TD from the pattern center to the tread edge. In the tread outer region from about 40 to 70% of the distance TD from the pattern center to the tread end to both ends of the tread, the block center line has a high angle θ2 of 60 degrees with respect to the circumferential direction. It extends obliquely. The directional inclined blocks 2 and 3 have an outer wide block 2 whose circumferential width is narrow in the tread inner region and wide in the tread outer region, and an inner wide block whose circumferential width is narrow in the tread outer region and wide in the tread inner region. The outer wide blocks 2 and the inner wide blocks 3 are alternately arranged in the circumferential direction. The width of the narrow portions of the directional inclined blocks 2 and 3 in the circumferential direction is 5 mm, the width of the wide portions in the circumferential direction is 27 mm, and the former is 19% of the latter. The directional tilt block 3 bites into the central circumferential rib 1, and the tip corner portion thereof has a tapered acute angle shape with an angle .theta.3 of 35 degrees.

【００１５】第２図のＡ−Ａ断面図に示すように、内側
広幅ブロック３のブロック高さが、トレッド内側領域で
中央周方向リブ１と同じ高さで、トレッド外側領域で中
央周方向リブ１の高さの２０％であって、第３図のＢ−
Ｂ断面図に示すように、外側広幅ブロック２のブロック
高さが、トレッド外側領域で中央周方向リブ１と同じ高
さで、トレッド内側領域で中央周方向リブ１の高さの２
０％である。第２乃至３図に示すように、方向性傾斜ブ
ロックの高さが、パターン・センターであるタイヤ赤道
線Ｅからトレッド端ＴＥまでの距離のおよそ４０乃至７
０％の位置で、中央周方向リブ１と同じ高さから中央周
方向リブの高さの２０％まで徐々に変化し、外側広幅ブ
ロック２と内側広幅ブロック３とが同じ位置で逆方向に
ブロックの高さを変化することによって、周方向に連続
する周方向溝４を形成している。外側広幅ブロック２の
ブロック高さが中央周方向リブ１の近傍で徐々に増加し
周方向リブ１と同じ高さとなり、内側広幅ブロック３の
ブロック高さが中央周方向リブ１の近傍で徐々に減少し
中央周方向リブ１の高さの２０％となっている。As shown in the sectional view taken along the line AA in FIG. 2, the block height of the inner wide block 3 is the same as that of the central circumferential rib 1 in the tread inner region and the central circumferential rib in the tread outer region. 20% of the height of 1, and B- in FIG.
As shown in the B cross-sectional view, the block height of the outer wide block 2 is the same as that of the central circumferential rib 1 in the tread outer region and 2 times the height of the central circumferential rib 1 in the tread inner region.
0%. As shown in FIGS. 2 to 3, the height of the directional tilt block is approximately 40 to 7 that is the distance from the tire equator line E, which is the pattern center, to the tread edge TE.
At the 0% position, the height gradually changes from the same height as the central circumferential rib 1 to 20% of the height of the central circumferential rib, and the outer wide block 2 and the inner wide block 3 block at the same position in opposite directions. By changing the height of the, the circumferential groove 4 continuous in the circumferential direction is formed. The block height of the outer wide block 2 gradually increases in the vicinity of the central circumferential rib 1 to become the same height as the circumferential rib 1, and the block height of the inner wide block 3 gradually increases in the vicinity of the central circumferential rib 1. It is reduced to 20% of the height of the central circumferential rib 1.

【００１６】図４に示す従来例の空気入りタイヤは、従
来の空気入りタイヤのトレッド・パターンの典型的な例
であって、図示のように５本の周方向溝と多数の方向性
傾斜溝が周方向に間隔を置いて配置されている。タイヤ
・サイズは２２５／５０Ｒ１６で、トレッド幅ＴＷは約
２００ｍｍであって、いずれも上記実施例と同じであ
る。トレッド中央に設けられた周方向溝（６３）は幅４
ｍｍの狭い溝であるが、その左右に溝幅１１ｍｍの一対
の周方向溝（６２、６４）が設けられ、さらに、トレッ
ド両端部からトレッド中央部に向かってトレッド幅の約
１／４に相当する個所に溝幅１０ｍｍの一対の周方向溝
（６１、６５）が設けられ、この４本の太い周方向溝と
多数の方向性傾斜溝（７１、７２、７３、７４、７５、
７６）が濡れた路面上をタイヤが走行するときの排水性
に大きく寄与することを狙ったタイヤである。The conventional pneumatic tire shown in FIG. 4 is a typical example of the tread pattern of the conventional pneumatic tire. As shown in the drawing, five circumferential grooves and a large number of directional inclined grooves are provided. Are arranged at intervals in the circumferential direction. The tire size is 225 / 50R16, and the tread width TW is about 200 mm, both of which are the same as those in the above embodiment. The circumferential groove (63) in the center of the tread has a width of 4
Although it is a narrow groove of mm, a pair of circumferential grooves (62, 64) with a groove width of 11 mm is provided on the left and right sides, and further, it is equivalent to about 1/4 of the tread width from both ends of the tread toward the center of the tread. A pair of circumferential grooves (61, 65) having a groove width of 10 mm are provided at the positions to be formed, and these four thick circumferential grooves and a large number of directional inclined grooves (71, 72, 73, 74, 75,
76) is a tire aiming to greatly contribute to drainage when the tire travels on a wet road surface.

【００１７】図１乃至３に示す上記本発明に従う実施例
の乗用車用空気入りタイヤと図４に示す上記従来例の乗
用車用空気入りタイヤについて、ハイドロ・プレーニン
グ特性、耐偏摩耗特性およびドライ路面での操縦安定性
の評価試験を実施した。テスト条件はタイヤ内圧２．３
Ｋｇ／ｃｍ2 、直線ハイドロ・プレーニング特性は水深
５ｍｍのウエット路面走行時のテスト・ドライバーによ
るハイドロ・プレーニングの発生限界速度のフィーリン
グ評価、コーナリング時のハイドロ・プレーニング特性
は水深５ｍｍの半径８０ｍのテスト・コース路面通過時
の限界横Ｇの測定値とテスト・ドライバーによるハイド
ロ・プレーニングの発生限界速度のフィーリング評価と
の総合評価、耐偏摩耗特性は高速道路、山坂路および市
街地路を含めた１万ｋｍ走行後の隣接ブロック間の段差
測定値と目視評価との総合評価、ドライ路面での操縦安
定性はドライ状態のサーキット・コースを種々の走行モ
ードによりスポーツ走行したときのテスト・ドライバー
のフィーリング評価結果である。Regarding the pneumatic tires for passenger cars of the embodiments shown in FIGS. 1 to 3 according to the present invention and the pneumatic tires for passenger cars of the conventional example shown in FIG. 4, the hydro-planing characteristics, the uneven wear resistance and the dry road surface are shown. The steering stability evaluation test was conducted. The test conditions are tire internal pressure 2.3.
Kg / cm 2 , straight hydro-planing characteristic is a feeling evaluation of the limit speed of hydro-planing generation by a test driver when running on a wet road surface with a water depth of 5 mm, and hydro-planing characteristic when cornering is a test with a depth of 5 mm and a radius of 80 m・ Comprehensive evaluation of the limit lateral G measured when passing the course road and the feeling evaluation of the hydro-planing generation limit speed by the test driver. The uneven wear resistance is 1 including highway, mountain slope road and urban road. Comprehensive evaluation of the level difference between adjacent blocks after 10,000 km driving and visual evaluation, and steering stability on dry road surface is the driver's fee when running on a dry circuit course in various driving modes. It is a ring evaluation result.

【００１８】評価結果は従来例の空気入りタイヤの結果
を１００とした指数表示で示してあり、数字が大きいほ
ど性能が優れていることを示している。評価結果のまと
めを表１に示す。The evaluation results are shown in index form with the result of the pneumatic tire of the conventional example as 100, and the larger the number, the better the performance. Table 1 shows a summary of the evaluation results.

【００１９】[0019]

【表１】 [Table 1]

【００２０】表１に示された結果から、本発明に従う実
施例の乗用車用空気入りタイヤは上記従来例の乗用車用
空気入りタイヤに比べて、ドライ路面での操縦安定性お
よび耐偏摩耗特性のいずれにおいても同等の性能を維持
しながら、ハイドロ・プレーニング特性では優れている
ことが分かった。From the results shown in Table 1, the pneumatic tires for passenger cars of the examples according to the present invention are superior to the pneumatic tires for passenger cars of the above-mentioned conventional example in steering stability on dry road surface and uneven wear resistance. It was found that the hydro-planing characteristics were excellent while maintaining the same performance in all cases.

【００２１】[0021]

【発明の効果】本発明では、スポーツ走行にも対応でき
る運動性能を重視した高運動性能タイヤであって、しか
も耐偏摩耗性能やドライ路面上での操縦安定性能を低下
することなく、ウエット路面での操縦安定性やハイドロ
・プレーニング特性の優れた、乗用車用空気入りタイヤ
に用いられる新規なトレッド・パターンを提供すること
が可能となった。INDUSTRIAL APPLICABILITY The present invention is a high-performance tire which emphasizes athletic performance capable of supporting sports running, and does not deteriorate uneven wear resistance and steering stability on dry roads, and wet road surfaces. It has become possible to provide a new tread pattern for use in pneumatic tires for passenger cars, which has excellent steering stability and hydroplaning characteristics.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による空気入りタイヤのトレッド・パタ
ーン図である。FIG. 1 is a tread pattern diagram of a pneumatic tire according to the present invention.

【図２】上記トレッド・パターンのＡ−Ａ断面図であ
る。FIG. 2 is a sectional view taken along the line AA of the tread pattern.

【図３】上記トレッド・パターンのＢ−Ｂ断面図であ
る。FIG. 3 is a BB cross-sectional view of the tread pattern.

【図４】従来の典型的な空気入りタイヤのトレッド・パ
ターン図である。FIG. 4 is a tread pattern diagram of a conventional typical pneumatic tire.

【符号の説明】[Explanation of symbols]

ＴＤ パターン・センターからトレッド端までの距離 Ｅ タイヤ赤道線 Ｒ タイヤの回転方向 ＴＥ トレッド端 ＴＷ トレッド幅 θ1 トレッド内側領域における周方向に対するブロッ
ク中心線の角度 θ2 トレッド外側領域における周方向に対するブロッ
ク中心線の角度 θ3 方向性傾斜ブロック先端隅部の角度 １ 中央周方向リブ ２ 方向性傾斜ブロック ３ 方向性傾斜ブロック ４ 周方向溝TD Distance from pattern center to tread edge E Tire equatorial line R Tire rotation direction TE Tread edge TW Tread width θ1 Angle of block center line with respect to circumferential direction in tread inner area θ2 Block center line with respect to circumferential direction in tread outer area Angle θ3 Directional tilt block Angle at the tip corner 1 Central circumferential rib 2 Directional tilt block 3 Directional tilt block 4 Circumferential groove

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 パターン・センターに設けられた中央周
方向リブと、該中央周方向リブから左右のトレッド端ま
で周方向に対して傾斜して延び、周方向に間隔を置いて
設けられた多数の方向性傾斜ブロックとを備えた方向性
トレッド・パターンを有する空気入りタイヤにおいて、
（１）該方向性傾斜ブロックは、パターン・センターか
らトレッド端までの距離のおよそ４０乃至７０％の位置
から内側のトレッド内側領域では、ブロック中心線が周
方向に対して２０乃至４０度程度の低い角度で傾斜して
延び、パターン・センターからトレッド端までの距離の
およそ４０乃至７０％の位置からトレッド両端までのト
レッド外側領域では、ブロック中心線が周方向に対して
６０乃至７０度程度の高い角度で傾斜して延び、（２）
該方向性傾斜ブロックは、周方向の幅が該トレッド内側
領域で狭く、該トレッド外側領域で広い外側広幅ブロッ
クと、周方向の幅が該トレッド外側領域で狭く、該トレ
ッド内側領域で広い内側広幅ブロックとで構成され、
（３）該外側広幅ブロックと該内側広幅ブロックとが周
方向に交互に配置されていることを特徴とするトレッド
・パターンを備えた空気入りタイヤ。1. A central circumferential rib provided in a pattern center, and a plurality of circumferentially spaced ribs extending from the central circumferential rib to the left and right tread ends with an inclination with respect to the circumferential direction. In a pneumatic tire having a directional tread pattern with a directional tilt block of
(1) In the directional inclined block, the center line of the block is about 20 to 40 degrees with respect to the circumferential direction in the tread inner area inside about 40 to 70% of the distance from the pattern center to the tread edge. In the tread outer region from the position of about 40 to 70% of the distance from the pattern center to the tread edge to the tread ends, the block center line is about 60 to 70 degrees with respect to the circumferential direction. Extending at a high angle, (2)
The directional slanted block has an outer wide block whose circumferential width is narrow in the tread inner region and wide in the tread outer region, and an inner wide block whose circumferential width is narrow in the tread outer region and wide in the tread inner region. Consists of blocks and
(3) A pneumatic tire having a tread pattern, wherein the outer wide blocks and the inner wide blocks are alternately arranged in the circumferential direction. 【請求項２】 該方向性傾斜ブロックの狭幅部の周方向
の幅が、広幅部の周方向の幅の１５乃至４５％であるこ
とを特徴とする請求項１記載の空気入りタイヤ。2. The pneumatic tire according to claim 1, wherein the width of the narrow portion of the directional inclined block in the circumferential direction is 15 to 45% of the width of the wide portion in the circumferential direction. 【請求項３】 該外側広幅ブロックのブロック高さが、
該トレッド外側領域で該中央周方向リブと同じ高さで、
該トレッド内側領域で該中央周方向リブの高さの０乃至
２０％であって、該内側広幅ブロックのブロック高さ
が、該トレッド内側領域で該中央周方向リブと同じ高さ
で、該トレッド外側領域で該中央周方向リブの高さの０
乃至２０％であることを特徴とする請求項１乃至２記載
の空気入りタイヤ。3. The block height of the outer wide block is
At the same height as the central circumferential rib in the tread outer region,
0 to 20% of the height of the central circumferential rib in the tread inner region, and the block height of the inner wide block is the same height as the central circumferential rib in the tread inner region, In the outer region, the height of the central circumferential rib is 0.
It is 20% to 20%, The pneumatic tire of Claim 1 or 2 characterized by the above-mentioned. 【請求項４】 該方向性傾斜ブロックの高さが、パター
ン・センターからトレッド端までの距離のおよそ４０乃
至７０％の位置で、該中央周方向リブと同じ高さから該
中央周方向リブの高さの０乃至２０％まで徐々に変化す
ることを特徴とする請求項３記載の空気入りタイヤ。4. The height of the directional tilt block is about 40 to 70% of the distance from the pattern center to the tread edge, and the height of the central circumferential rib is the same as the height of the central circumferential rib. The pneumatic tire according to claim 3, wherein the height gradually changes from 0 to 20% of the height. 【請求項５】 該外側広幅ブロックと該内側広幅ブロッ
クとが同じ位置で逆方向にブロックの高さを変化するこ
とによって、周方向に連続する周方向溝を形成すること
を特徴とする請求項４記載の空気入りタイヤ。5. The circumferential groove that is continuous in the circumferential direction is formed by changing the height of the outer wide block and the inner wide block at the same position in opposite directions. 4. The pneumatic tire according to 4. 【請求項６】 該外側広幅ブロックのブロック高さが該
中央周方向リブの近傍で該中央周方向リブと同じ高さ
で、該内側広幅ブロックのブロック高さが該中央周方向
リブの近傍で該中央周方向リブの高さの０乃至２０％で
あることを特徴とする請求項３乃至５記載の空気入りタ
イヤ。6. The block height of the outer wide block is the same height as the central circumferential rib near the central circumferential rib, and the block height of the inner wide block is near the central circumferential rib. The pneumatic tire according to claim 3, wherein the height of the central circumferential rib is 0 to 20%. 【請求項７】 該方向性傾斜ブロックの一部が、該周方
向リブの周方向連続性を損なうことなしに、該周方向リ
ブに食い込むように配置され、該方向性傾斜ブロックの
該周方向リブに食い込んでいる先端隅部は先細鋭角形状
であり、該方向性傾斜ブロックの少なくとも該周方向リ
ブに食い込んでいる先端隅部のブロック高さが、該周方
向リブに食い込むにしたがい徐々に低くなり、該周方向
リブの高さの０乃至２０％で終端することを特徴とする
請求項１乃至６記載の空気入りタイヤ。7. A part of the directional inclined block is arranged so as to bite into the circumferential rib without impairing the circumferential continuity of the circumferential rib, and the circumferential direction of the directional inclined block. The tip corner portion that digs into the rib has a tapered acute angle shape, and the block height of the tip corner portion that digs into at least the circumferential rib of the directional tilted block gradually decreases as it digs into the circumferential rib. 7. The pneumatic tire according to claim 1, wherein the pneumatic tire terminates at 0 to 20% of the height of the circumferential rib.
JP15207995A 1995-06-19 1995-06-19 High performance pneumatic tire with directional tilt block Expired - Fee Related JP3590137B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15207995A JP3590137B2 (en) 1995-06-19 1995-06-19 High performance pneumatic tire with directional tilt block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15207995A JP3590137B2 (en) 1995-06-19 1995-06-19 High performance pneumatic tire with directional tilt block

Publications (2)

Publication Number Publication Date
JPH092024A true JPH092024A (en) 1997-01-07
JP3590137B2 JP3590137B2 (en) 2004-11-17

Family

ID=15532599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15207995A Expired - Fee Related JP3590137B2 (en) 1995-06-19 1995-06-19 High performance pneumatic tire with directional tilt block

Country Status (1)

Country Link
JP (1) JP3590137B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6705366B2 (en) * 2000-02-16 2004-03-16 Bridgestone Corporation Pneumatic tire including headland part
US6799616B2 (en) * 2000-01-17 2004-10-05 Bridgestone Corporation Pneumatic tire including auxiliary land part having slope
US6823911B1 (en) * 1999-02-26 2004-11-30 Bridgestone Corporation Pneumatic tire including pseudo-land portion formed in circumferential groove
JP2008222088A (en) * 2007-03-14 2008-09-25 Bridgestone Corp Pneumatic tire
US20100252157A1 (en) * 2007-11-02 2010-10-07 Bridgestone Corporation Pneumatic radial tire
US20110277894A1 (en) * 2010-05-13 2011-11-17 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
US20130020002A1 (en) * 2010-01-29 2013-01-24 Bridgestone Corporation Tire
CN109334353A (en) * 2018-11-08 2019-02-15 厦门正新橡胶工业有限公司 Tire for wheel chair structure

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6823911B1 (en) * 1999-02-26 2004-11-30 Bridgestone Corporation Pneumatic tire including pseudo-land portion formed in circumferential groove
US6799616B2 (en) * 2000-01-17 2004-10-05 Bridgestone Corporation Pneumatic tire including auxiliary land part having slope
US6705366B2 (en) * 2000-02-16 2004-03-16 Bridgestone Corporation Pneumatic tire including headland part
JP2008222088A (en) * 2007-03-14 2008-09-25 Bridgestone Corp Pneumatic tire
US20100096054A1 (en) * 2007-03-14 2010-04-22 Bridgestone Corporation Pneumatic tire
US9302551B2 (en) * 2007-03-14 2016-04-05 Bridgestone Corporation Pneumatic tire with tread having V-shaped groove
US8752599B2 (en) * 2007-11-02 2014-06-17 Bridgestone Corporation Pneumatic radial tire
US20100252157A1 (en) * 2007-11-02 2010-10-07 Bridgestone Corporation Pneumatic radial tire
US9358843B2 (en) * 2010-01-29 2016-06-07 Bridgestone Corporation Tire
US20130020002A1 (en) * 2010-01-29 2013-01-24 Bridgestone Corporation Tire
US20110277894A1 (en) * 2010-05-13 2011-11-17 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
US8739848B2 (en) * 2010-05-13 2014-06-03 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
JP2011235853A (en) * 2010-05-13 2011-11-24 Toyo Tire & Rubber Co Ltd Pneumatic tire
CN109334353A (en) * 2018-11-08 2019-02-15 厦门正新橡胶工业有限公司 Tire for wheel chair structure
CN109334353B (en) * 2018-11-08 2024-04-26 厦门正新橡胶工业有限公司 Tire structure for wheelchair

Also Published As

Publication number Publication date
JP3590137B2 (en) 2004-11-17

Similar Documents

Publication Publication Date Title
JP3177466B2 (en) Pneumatic tire
JP3555777B2 (en) High performance pneumatic tire with directional sloping grooves
JPH09328003A (en) Pneumatic tire
JP2004352023A (en) Pneumatic tire
JP3383405B2 (en) Pneumatic tire with straight grooves
JP3958426B2 (en) Pneumatic radial tire for passenger cars with directional inclined grooves
JP3447367B2 (en) Pneumatic tire having a directional inclined groove
EP0858916B1 (en) Vehicle tyre
JP4122179B2 (en) Pneumatic tire
JP2000255217A (en) Pneumatic tire
JP4145397B2 (en) Pneumatic tires for motorcycles
JPH092024A (en) High maneuverability pneumatic tire having directional slant block
JP2639750B2 (en) Pneumatic radial tire
JPH092021A (en) High maneuverability pneumatic tire having directional slant block
JPH07276920A (en) Pneumatic tire
JP4473689B2 (en) Pneumatic tire
JP3550332B2 (en) Pneumatic tire
JP3502166B2 (en) Pneumatic radial tire
JP3776568B2 (en) Pneumatic tire
JP4421432B2 (en) Pneumatic tire
WO2021054261A1 (en) Tire
JPH08164714A (en) Pneumatic radial tire
JP3377291B2 (en) Pneumatic tire with directional tread pattern
JP2000272308A (en) Pneumatic radial tire
JP4209016B2 (en) Pneumatic tire for passenger cars with excellent drainage performance

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040601

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040617

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20040817

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040819

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080827

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080827

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090827

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090827

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100827

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees