JPH03128704A - Radial tire - Google Patents
Radial tireInfo
- Publication number
- JPH03128704A JPH03128704A JP1267180A JP26718089A JPH03128704A JP H03128704 A JPH03128704 A JP H03128704A JP 1267180 A JP1267180 A JP 1267180A JP 26718089 A JP26718089 A JP 26718089A JP H03128704 A JPH03128704 A JP H03128704A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- depth
- shoulder
- groove
- radial tire
- 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
Links
- 230000020169 heat generation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、自動車のラジアルタイヤ特にブロックパター
ンを有するラジアルタイヤに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radial tire for an automobile, particularly a radial tire having a block pattern.
（従来の技術）
従来、自動車の高速化に対応して、その高速性−能の確
保手段としてタイヤが偏平化されると共に、ウェット性
能低下防止のために、タイヤ踏面に形成されるトレッド
パターンが、タイヤ周方向にストレートな上溝を有する
ブロックパターンとなっている （例えば特開昭６２−
１７５２０５号公報参照）。(Prior Art) Conventionally, in response to the increasing speeds of automobiles, tires have been made flatter as a means of ensuring high-speed performance, and the tread pattern formed on the tire tread has been changed to prevent deterioration of wet performance. , the tire has a block pattern with a straight upper groove in the circumferential direction (for example, Japanese Patent Application Laid-Open No. 62-
(See Publication No. 175205).
すなわち、このタイヤは、第２図に例示するように、タ
イヤ１の踏面２に、タイヤ周方向に複数のストレート主
導３，４が環状に設けられ、これらのストレート主導３
．４からタイヤ幅方向に延びる複数の横溝５，６が配設
され、各溝３〜６間にブロック７．８が形成されている
。そして、主導３の深さＡは、横溝５．６の深さＢと略
同−１即ち、主導３の深さＡが横溝５，６のを通ってタ
イヤ１のショルダ部に至るまで路間−に維持されている
（第３図参照）。That is, as illustrated in FIG. 2, in this tire, a plurality of straight leads 3 and 4 are annularly provided on the tread 2 of the tire 1 in the tire circumferential direction, and these straight leads 3
．． 4, a plurality of lateral grooves 5, 6 are provided extending in the tire width direction, and blocks 7.8 are formed between each groove 3-6. The depth A of the lead 3 is approximately the same as the depth B of the lateral groove 5.6 - 1, that is, the depth A of the lead 3 passes through the lateral grooves 5 and 6 and reaches the shoulder part of the tire 1. - (see Figure 3).
（発明が解決しようとする課題）
前記ブロックパターンタイヤ１は、踏面２のショルダー
部横溝６ （ショルダースロットともいう）が、センタ
一部横溝５と同−深さであるから、トレッドゴムボリュ
ームが大きく、高速走行時にショルダー部ブロック８の
せり上がり （リフティング）が大きくなり、スタンデ
ィングウェーブの発生により高速耐久性が低下するとい
う問題がある。(Problems to be Solved by the Invention) In the block pattern tire 1, the shoulder lateral groove 6 (also referred to as shoulder slot) of the tread 2 has the same depth as the center lateral groove 5, so the tread rubber volume is large. There is a problem in that during high-speed running, the lifting of the shoulder block 8 becomes large and the high-speed durability is reduced due to the generation of standing waves.
本発明は、上述のような実状に鑑みてなされたもので、
その目的とするところは、ショルダー部のトレッドゴム
ボリュームを小さくして、高速走行時のスタンディング
ウェーブの発生を緩和し、タイヤの高速耐久性を向上さ
せることができるラジアルタイヤを提供するにある。The present invention was made in view of the above-mentioned circumstances, and
The purpose is to provide a radial tire that can reduce the tread rubber volume in the shoulder area, alleviate the occurrence of standing waves during high-speed running, and improve the high-speed durability of the tire.
（課題を解決するための手段）
本発明では、上記目的を達成するために、次の技術的手
段を講じた。(Means for Solving the Problems) In the present invention, the following technical measures were taken in order to achieve the above object.
すなわち、本発明は、タイヤ踏面２にタイヤ周方向に複
数の主導３，４を備え、該主導３．４からタイヤ幅方向
に複数の横溝５，６を設けて多数のブロック７．８を形
成してなるラジアルタイヤにおいて、前記横溝５．６の
うち少なくともショルダー部横溝６の深さＢは主導３の
溝深さＡよりも浅くかつショルダー部外端に向って順次
浅（したことを特徴としている。That is, in the present invention, the tire tread surface 2 is provided with a plurality of main leads 3, 4 in the tire circumferential direction, and a plurality of lateral grooves 5, 6 are provided in the tire width direction from the main leads 3.4 to form a large number of blocks 7.8. In the radial tire, the depth B of at least the shoulder lateral groove 6 of the lateral grooves 5.6 is shallower than the groove depth A of the leading edge 3, and gradually becomes shallower toward the outer end of the shoulder portion. There is.
（作 用）
本発明によれば、タイヤショルダー部のトレッドゴムボ
リュームが少なくなるので、タイヤの高速走行時におい
てショルダー部のリフティングが小さくなり、スタンデ
ィングウェーブの発生が緩和され、タイヤの発熱温度が
低下する。(Function) According to the present invention, since the tread rubber volume in the tire shoulder portion is reduced, the lifting of the shoulder portion is reduced when the tire is running at high speed, the generation of standing waves is alleviated, and the heat generation temperature of the tire is reduced. do.
（実施例） 以下、本発明の実施例を図面に基づき説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
なお、本実施例は、第２図及び第３図に示した従来のラ
ジアルタイヤを改良したものであり、同等部分は同−符
号及び名称を用いる。This embodiment is an improvement on the conventional radial tire shown in FIGS. 2 and 3, and the same symbols and names are used for equivalent parts.
本実施例の従来例と異なる点は、横溝５，６の溝深さＢ
が、主導３の溝深さ八よりも浅くかつショルダー部の外
端に向って順次浅くなっていることである。The difference between this embodiment and the conventional example is that the groove depth B of the lateral grooves 5 and 6 is
However, the groove depth is shallower than the groove depth 8 of the leading edge 3 and gradually becomes shallower toward the outer end of the shoulder portion.
そして、タイヤセンタ一部の横溝５は、タイヤ幅方向両
端部でその幅が拡開されて前記主導３，４に連通し、セ
ンタ一部ブロック７が形成されている。ショルダー部の
横溝６は、タイヤ幅方向のタイヤセンター側端でその幅
が拡開されて前記主導４に連通し、ショルダー部外端で
タイヤ周方向の小ストレート溝９に連通して、各溝４，
６．９によってショルダー部ブロック８が区画形成され
ている。The width of the lateral groove 5 in a part of the tire center is expanded at both ends in the width direction of the tire and communicates with the main leads 3 and 4, forming a part of the center block 7. The width of the lateral groove 6 in the shoulder portion is expanded at the tire center side end in the tire width direction and communicates with the main lead 4, and the outer end of the shoulder portion communicates with the small straight groove 9 in the tire circumferential direction. 4,
The shoulder block 8 is defined by 6.9.
このショルダー部ブロック８は、横溝６の溝深さＢが、
ショルダー部外端に向って順次浅くなっているので、そ
のトレッドゴムボリュームも順次ショルダー部外端に向
って小さくなる。In this shoulder block 8, the groove depth B of the lateral groove 6 is
Since the tread becomes shallower toward the outer end of the shoulder portion, the tread rubber volume also becomes smaller toward the outer end of the shoulder portion.
なお、ショルダー部横溝６の溝深さＢは、センタ一部主
導３の溝深さＡの９０〜５０％とするのが好ましい。ま
た、横溝５．６の深さは、ｌ／４点主導部よりも浅くし
てもよい。Note that the groove depth B of the shoulder portion lateral groove 6 is preferably 90 to 50% of the groove depth A of the center partial lead 3. Moreover, the depth of the lateral groove 5.6 may be shallower than the l/4 point main part.
上記実施例において、溝深さ比Ｂ／Ａを６９％とし、４
度キャンバ−付高速耐久テストを行ったところ、下表の
ような結果が得られ、それぞれ２ステツプ（ランク）の
向上がみられる。In the above embodiment, the groove depth ratio B/A is 69%, and the groove depth ratio B/A is 69%.
When we conducted a high-speed durability test with camber, the results shown in the table below were obtained, showing an improvement of 2 steps (rank) in each case.
次 葉
なお、本発明は、上記実施例に限定されるものではなく
、たとえば主導・横溝の数、横溝５．６の傾斜角度等を
任意に選定し、トレッドパターン形状を変更することが
できる。Note that the present invention is not limited to the above-described embodiments, and the tread pattern shape can be changed by arbitrarily selecting the number of leading and lateral grooves, the inclination angle of the lateral grooves 5.6, etc.
また、本発明の上記実施例においても、タイヤのウェッ
ト性能、耐摩耗性、コーナリング性能等の向上を図りう
ろこと勿論である。Furthermore, in the above-described embodiments of the present invention, it is a matter of course that the wet performance, wear resistance, cornering performance, etc. of the tire are improved.
（発明の効果）
本発明は、上述のように、タイヤ踏面２にタイヤ周方向
に複数の主導３，４を備え、該主導３，４からタイヤ幅
方向に複数の側溝５．６を設けて多数のブロック７．８
を形成してなるラジアルタイヤにおいて、
前記横溝５，６のうち少なくともショルダー部横溝６の
深さＢは主導３の溝深さＡよりも浅くかつショルダー部
外端に向って順次浅くしたことを特徴とするものである
から、タイヤのショルダー部フロック８のトレッドゴム
ボリュームを小さくでき、タイヤの高速回転時における
ショルダー部のせり上がり （リフティング）が小さく
、スタンディングウェーブの発生を緩和することができ
、したがって、タイヤの発熱温度が低下し高速耐久ＩＩ
Ｌを大幅に向上させることが可能である。(Effects of the Invention) As described above, the present invention includes a tire tread 2 having a plurality of leading edges 3 and 4 in the tire circumferential direction, and a plurality of side grooves 5 and 6 extending from the leading edges 3 and 4 in the tire width direction. Many blocks 7.8
The radial tire is characterized in that, of the lateral grooves 5 and 6, at least the depth B of the shoulder lateral groove 6 is shallower than the groove depth A of the main groove 3 and gradually becomes shallower toward the outer end of the shoulder portion. Therefore, the tread rubber volume of the flock 8 in the shoulder part of the tire can be reduced, the lifting of the shoulder part during high-speed rotation of the tire is small, and the occurrence of standing waves can be alleviated. , the tire's heat generation temperature decreases and high-speed durability II
It is possible to significantly improve L.
第１図は本発明の実施例を示す要部の断面図、第２図は
従来のトレッドパターンの一例を示す説明図、第３図は
第２図の横溝に沿った断面拡大図である。
１・・・タイヤ、２・・・踏面、３，４・・・主導、５
，６・・・横溝、７，８・・・ブロック、Ａ、Ｂ・・・
溝深さ。
縞
図
第
図
弔
図FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an example of a conventional tread pattern, and FIG. 3 is an enlarged cross-sectional view along the lateral grooves in FIG. 2. 1...Tire, 2...Tread, 3, 4...Leading, 5
, 6... Horizontal groove, 7, 8... Block, A, B...
Groove depth. Striped Diagram Funeral Map
Claims (1)
３）（４）を備え、該主導（３）（４）からタイヤ幅方
向に複数の横溝（５）（６）を設けて多数のブロック（
７）（８）を形成してなるラジアルタイヤにおいて、前
記横溝（５）（６）のうち少なくともショルダー部横溝
（６）の深さ（Ｂ）は主導（３）の溝深さ（Ａ）よりも
浅くかつショルダー部外端に向って順次浅くしたことを
特徴とするラジアルタイヤ。(1) Multiple leads (
3) (4), and a plurality of lateral grooves (5) (6) are provided in the tire width direction from the leading (3) (4) to form a large number of blocks (
7) In the radial tire formed with (8), the depth (B) of at least the shoulder lateral groove (6) among the lateral grooves (5) and (6) is greater than the groove depth (A) of the leading groove (3). A radial tire characterized by having a shallow shoulder area and gradually becoming shallower toward the outer edge of the shoulder part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1267180A JPH03128704A (en) | 1989-10-12 | 1989-10-12 | Radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1267180A JPH03128704A (en) | 1989-10-12 | 1989-10-12 | Radial tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03128704A true JPH03128704A (en) | 1991-05-31 |
Family
ID=17441220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1267180A Pending JPH03128704A (en) | 1989-10-12 | 1989-10-12 | Radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03128704A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431208A (en) * | 1992-09-16 | 1995-07-11 | Sumitomo Rubber Industries, Ltd. | Radial tire |
| US6527024B1 (en) * | 1999-02-05 | 2003-03-04 | Sumitomo Rubber Industries Limited | Tire having tread including shoulder grooves |
| CN102896981A (en) * | 2011-07-29 | 2013-01-30 | 住友橡胶工业株式会社 | Pneumatic tire |
| US20150375572A1 (en) * | 2013-02-12 | 2015-12-31 | The Yokohama Rubber Co., Ltd. | Pneumatic Tire |
| CN109572331A (en) * | 2018-11-09 | 2019-04-05 | 双钱集团（江苏）轮胎有限公司 | A kind of wear-resisting type engineering machinery tire |
-
1989
- 1989-10-12 JP JP1267180A patent/JPH03128704A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431208A (en) * | 1992-09-16 | 1995-07-11 | Sumitomo Rubber Industries, Ltd. | Radial tire |
| US6527024B1 (en) * | 1999-02-05 | 2003-03-04 | Sumitomo Rubber Industries Limited | Tire having tread including shoulder grooves |
| CN102896981A (en) * | 2011-07-29 | 2013-01-30 | 住友橡胶工业株式会社 | Pneumatic tire |
| US20150375572A1 (en) * | 2013-02-12 | 2015-12-31 | The Yokohama Rubber Co., Ltd. | Pneumatic Tire |
| CN109572331A (en) * | 2018-11-09 | 2019-04-05 | 双钱集团（江苏）轮胎有限公司 | A kind of wear-resisting type engineering machinery tire |
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