JPH06115317A - Pneumatic tire excellent in rain-groove wandering performance - Google Patents

Pneumatic tire excellent in rain-groove wandering performance

Info

Publication number
JPH06115317A
JPH06115317A JP4268704A JP26870492A JPH06115317A JP H06115317 A JPH06115317 A JP H06115317A JP 4268704 A JP4268704 A JP 4268704A JP 26870492 A JP26870492 A JP 26870492A JP H06115317 A JPH06115317 A JP H06115317A
Authority
JP
Japan
Prior art keywords
groove
straight
blocks
rain
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4268704A
Other languages
Japanese (ja)
Inventor
Yuji Hatada
裕司 畠田
Nariya Ookubo
成也 大久保
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.)
Ohtsu Tire and Rubber Co Ltd
Original Assignee
Ohtsu Tire and Rubber Co Ltd
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 Ohtsu Tire and Rubber Co Ltd filed Critical Ohtsu Tire and Rubber Co Ltd
Priority to JP4268704A priority Critical patent/JPH06115317A/en
Publication of JPH06115317A publication Critical patent/JPH06115317A/en
Pending legal-status Critical Current

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  • Tires In General (AREA)

Abstract

PURPOSE:To lower the RGW performance of a tire during run on a rain-grooved road surface so as to ease rigidity at impact by forming a plurality of sipes in the vertical plane of each straight groove at intervals along the depth of the groove. CONSTITUTION:The tread portion 10 of a pneumatic tire has two circumferentially rectilinear center ribs 11 at its center and two pairs of side blocks 13 are arranged circumferentially on the right and left of the center ribs 11 with straight grooves 12 intervening between the blocks and the ribs. Shoulder blocks 15 are arranged circumferentially on the right and left of the outside of the side blocks 13 with straight grooves 14 intervening between the blocks 13, 15. The right and left straight grooves 12, 14 are connected together by diagonal transverse grooves 16 and the vertical plane 14A of each of the right and left outside straight grooves 14 is tapered with a groove angle of about 1 deg. to 12 deg. to the meridian, and a plurality of sipes 18 are formed in the vertical plane 14A at intervals along the depth of the grooves.

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、レイングルーブワンダ
ー性能 (レイングルーブワンダ、RGW性能) に優れた
空気入りタイヤに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire having excellent rain groove wonder performance (rain groove wander, RGW performance).

【0002】[0002]

【従来の技術】例えば、アメリカ合衆国等の高速道路に
は、レイングルーブを形成した路面があり、斯る路面を
走行するときは、タイヤトレッドに形成したストレート
溝と路面の溝とのぶつかりによる力によって発生するレ
イングルーブワンダが溝位置によっては非常に悪くな
る。
2. Description of the Related Art For example, on a highway such as the United States of America, there is a road surface on which a rain groove is formed. When traveling on such a road surface, the force generated by the collision between the straight groove formed on the tire tread and the groove on the road surface The generated rain groove wander becomes very bad depending on the groove position.

【0003】このため、図3に示す如く、ストレート溝
1 を形成するブロック2(又はリブ)のエッジに、周方向
の間隔をもってサイプ3 を形成し、RGW性を向上しよ
うとしたものがある。
Therefore, as shown in FIG. 3, the straight groove
There is an attempt to improve the RGW property by forming sipes 3 on the edges of the blocks 2 (or ribs) forming 1 with a circumferential interval.

【0004】[0004]

【発明が解決しようとする課題】しかし、従来の技術で
は、タイヤ回転方向 (周方向) の応力緩和は期待できる
も、RGW性には差程寄与することはできない。特に、
サイプ3 の深さに限度があることから、RGW性に問題
があった。そこで本発明は、ストレート溝の溝立面にサ
イプを形成することにより、RGW性を小さくして自動
車の横振れを防止したことを目的とする。
However, in the prior art, although stress relaxation in the tire rotation direction (circumferential direction) can be expected, it is not possible to contribute to the RGW property to a different extent. In particular,
Due to the limited depth of sipe 3, there was a problem with RGW performance. Therefore, an object of the present invention is to form a sipe on the vertical surface of a straight groove to reduce the RGW property and prevent lateral vibration of an automobile.

【0005】[0005]

【課題を解決するための手段】本発明は、ブロックパタ
ーン又はリブパターンを有するトレッド部10に、周方向
に連続するストレート溝14を有する空気入りタイヤにお
いて、前述の目的を達成するために、次の技術的手段を
講じている。すなわち、本発明は、前記ストレート溝14
の溝立面14A に、溝深さ方向の間隔を有して複数のサイ
プ18を形成していることを特徴とするものである。
The present invention provides a pneumatic tire having straight grooves 14 continuous in the circumferential direction in a tread portion 10 having a block pattern or a rib pattern. Are taking technical measures. That is, in the present invention, the straight groove 14
A plurality of sipes 18 are formed on the groove rising surface 14A at intervals in the groove depth direction.

【0006】[0006]

【作用】本発明に係るタイヤを自動車に装着してレイン
グルーブ路面を走行するとき、レイングルーブのエッジ
とストレート溝14のエッジが衝突する力はサイプ18によ
って緩和され、RGWを小さくし、自動車の横振れを防
止する。
When the tire according to the present invention is mounted on an automobile and travels on the road surface of the rain groove, the force with which the edge of the rain groove and the edge of the straight groove 14 collide is alleviated by the sipe 18, reducing the RGW, and Prevent lateral shake.

【0007】[0007]

【実施例】以下、図を参照して本発明の実施例を説明す
る。図1は本発明に係る空気入りタイヤ (ラジアルタイ
ヤ) のトレッド部10の一例を示し、図ではブロックパタ
ーンで示しているが、これはリブパターン又はリブブロ
ックパターンであってもよい。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a tread portion 10 of a pneumatic tire (radial tire) according to the present invention, which is shown as a block pattern in the figure, but it may be a rib pattern or a rib block pattern.

【0008】トレッド部10はそのセンターに2本のセン
ターリブ11を周方向に直線状に有し、センターリブ11の
左右にはストレート溝12を介して2組のサイドブロック
13が周方向に配列してあり、このサイドブロック13の左
右外側にはストレート溝14を介してショルダーブロック
15が周方向に配列してある。左右のストレート溝12,14
は斜め方向に延びる横溝16で連結され、ストレート溝1
2,14 で周方向の排水性を、横溝16でトラックションを
発生するようにしている。
The tread portion 10 has two center ribs 11 at the center thereof in a straight line in the circumferential direction, and two sets of side blocks are provided on the left and right of the center rib 11 with straight grooves 12 interposed therebetween.
13 are arranged in the circumferential direction, and shoulder blocks are provided on the left and right outer sides of the side block 13 through straight grooves 14.
15 are arranged in the circumferential direction. Left and right straight grooves 12,14
Are connected by a lateral groove 16 extending diagonally, and a straight groove 1
Circumferential drainage is provided at 2,14 and traverse is produced at the lateral groove 16.

【0009】左右の外側のストレート溝14の溝立面14A
は、子午線17に対して1 ゜〜12゜の溝角度θを有してテ
ーパー面とされており、該立面14A には溝深さ方向の間
隔を有してサイプ18が複数個形成してある。サイプ角度
θ1 は、10゜〜30゜とされ、サイプ深さLは 2〜5mm と
されている。
Groove elevations 14A of the right and left outer straight grooves 14
Is a tapered surface having a groove angle θ of 1 ° to 12 ° with respect to the meridian 17, and a plurality of sipes 18 are formed on the vertical surface 14A at intervals in the groove depth direction. There is. The sipe angle θ1 is 10 ° to 30 °, and the sipe depth L is 2 to 5 mm.

【0010】ここで、θ1 を10゜〜30゜としたのは、10
゜未満であるとRGW性の改良効果が低くなり、30゜以
上であると操安性および生産性の低下を招くからであ
る。また、サイプ深さLを 2〜5mm としたのは、2mm 未
満であれば剛性の分散化ができずRGW性の改良の効果
が低く、5mm 以上であると剛性が極端に低くなって操安
性、生産性が低下するからである。
Here, the reason why θ1 is 10 ° to 30 ° is 10
This is because if it is less than 30 °, the effect of improving the RGW property is lowered, and if it is more than 30 °, the stability and productivity are lowered. Further, the sipe depth L is set to 2 to 5 mm, because if it is less than 2 mm, the rigidity cannot be dispersed and the effect of improving the RGW property is low, and if it is 5 mm or more, the rigidity becomes extremely low and the operation stability is reduced. This is because the productivity and productivity are reduced.

【0011】次に、図1に示したパターンでサイプ深さ
を 3mm、角度θ1 とした195/70R14EXNOVA−SVについて
テストした結果を下記に示す。
Next, the results of testing the 195 / 70R14 EXNOVA-SV with the sipe depth of 3 mm and the angle θ1 in the pattern shown in FIG. 1 are shown below.

【0012】[0012]

【表1】 [Table 1]

【0013】[0013]

【表2】 [Table 2]

【0014】[0014]

【発明の効果】本発明は以上の通りであり、ストレート
溝の立面に形成したサイプによって、レイングルーブ路
面を走行中のRGW性を低くして衝撃に伴う剛性を緩和
できる。また、サイプはトレッド幅方向に口開き可能で
あることから、摩耗しても効果の持続性が大きくなる。
The present invention is as described above, and the sipe formed on the upright surface of the straight groove can reduce the RGW property while traveling on the rain groove road surface and reduce the rigidity accompanying the impact. In addition, since the sipes can be opened in the width direction of the tread, the effect becomes more durable even when worn.

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

【図1】本発明に係るトレッドの平面図と拡大斜視図で
ある。
FIG. 1 is a plan view and an enlarged perspective view of a tread according to the present invention.

【図2】サイプの形状を示す説明図である。FIG. 2 is an explanatory view showing the shape of a sipe.

【図3】従来例の斜視図である。FIG. 3 is a perspective view of a conventional example.

【符号の説明】[Explanation of symbols]

10 トレッド部 13 サイドブロック 14 ストレート溝 14A 溝立面 15 ショルダーブロック 18 サイプ 10 Tread portion 13 Side block 14 Straight groove 14A Groove elevation 15 Shoulder block 18 Sipe

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ブロックパターン又はリブパターンを有
するトレッド部(10)に、周方向に連続するストレート溝
(14)を有する空気入りタイヤにおいて、 前記ストレート溝(14)の溝立面(14A) に、溝深さ方向の
間隔を有して複数のサイプ(18)を形成していることを特
徴とするレイングルーブワンダー性能に優れた空気入り
タイヤ。
1. A straight groove continuous in the circumferential direction on a tread portion (10) having a block pattern or a rib pattern.
In the pneumatic tire having (14), the groove straight surface (14A) of the straight groove (14), a plurality of sipes (18) are formed at intervals in the groove depth direction, Pneumatic tire with excellent rain groove wonder performance.
JP4268704A 1992-10-07 1992-10-07 Pneumatic tire excellent in rain-groove wandering performance Pending JPH06115317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4268704A JPH06115317A (en) 1992-10-07 1992-10-07 Pneumatic tire excellent in rain-groove wandering performance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4268704A JPH06115317A (en) 1992-10-07 1992-10-07 Pneumatic tire excellent in rain-groove wandering performance

Publications (1)

Publication Number Publication Date
JPH06115317A true JPH06115317A (en) 1994-04-26

Family

ID=17462216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4268704A Pending JPH06115317A (en) 1992-10-07 1992-10-07 Pneumatic tire excellent in rain-groove wandering performance

Country Status (1)

Country Link
JP (1) JPH06115317A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5603785A (en) * 1994-05-06 1997-02-18 The Goodyear Tire & Rubber Company Tire including two aquachannels on one side
US20170100965A1 (en) * 2015-10-09 2017-04-13 Sumitomo Rubber Industries, Ltd. Tire
CN112810387A (en) * 2019-11-18 2021-05-18 住友橡胶工业株式会社 Tyre for vehicle wheels

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5603785A (en) * 1994-05-06 1997-02-18 The Goodyear Tire & Rubber Company Tire including two aquachannels on one side
US20170100965A1 (en) * 2015-10-09 2017-04-13 Sumitomo Rubber Industries, Ltd. Tire
US10696102B2 (en) * 2015-10-09 2020-06-30 Sumitomo Rubber Industries, Ltd. Tire
CN112810387A (en) * 2019-11-18 2021-05-18 住友橡胶工业株式会社 Tyre for vehicle wheels
CN112810387B (en) * 2019-11-18 2023-10-17 住友橡胶工业株式会社 Tire with a tire body

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