JPH02155808A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH02155808A JPH02155808A JP63309917A JP30991788A JPH02155808A JP H02155808 A JPH02155808 A JP H02155808A JP 63309917 A JP63309917 A JP 63309917A JP 30991788 A JP30991788 A JP 30991788A JP H02155808 A JPH02155808 A JP H02155808A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- zigzag
- groove
- circumferential
- zigzag groove
- 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
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
- B60C11/042—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag further characterised by the groove cross-section
-
- 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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
- B60C11/0309—Patterns comprising block rows or discontinuous ribs further characterised by the groove cross-section
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- 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、使用初期においてはトラクション性に優れる
と共に摩耗中期以降においてはりブタイブ（トレッド表
面にタイヤ周方向に直線溝を形成したもの）のタイヤと
して機能するりプラグタイプの空気入りタイヤに関する
。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a tire with excellent traction properties in the initial stage of use, and a beam type tire (having straight grooves formed in the tire circumferential direction on the tread surface) in the middle and later stages of wear. Concerning plug-type pneumatic tires that function as plugs.
従来、ショルダー部リブにタイヤ周方向に間隔をおいて
複数の幅方向溝を設けたり・プラグタイプの空気入りタ
イヤは、トラクション指向のリブタイヤとして誕生した
。その要求性能としては、操縦安定性、耐摩耗性、耐偏
摩耗性、高速耐久性などが挙げられる。もらろん、トラ
クション性能についても優れていなければならない。そ
こで、このトラクション性能の向上のために、リブ部を
ジグザグにしたもの（換言すれば、トレッド表面のセン
ター部にタイヤ周方向に延びる複数のシダザグ溝をタイ
ヤ幅方向に間隔をおいて配置したもの）が提案されてい
る。しかしながら、このリブラグタイプの空気入りタイ
ヤでは、操縦安定性、耐摩耗性、および耐偏摩耗性を重
視するために、リブ部を十分にジグザグにすることがで
きないので、トラクション性能については未だ不十分で
あった。また、使用における摩耗中期以降では、溝がジ
グザグであるために、同じ残溝深さを有するりブタイブ
の空気入りタイヤに比して操縦安定性、排水性、燃費性
に劣るという欠点があった。Conventionally, plug-type pneumatic tires were created as traction-oriented ribbed tires, in which multiple widthwise grooves were provided on the shoulder ribs at intervals in the tire circumferential direction. The required performance includes handling stability, wear resistance, uneven wear resistance, and high-speed durability. Of course, traction performance must also be excellent. Therefore, in order to improve this traction performance, the rib part has a zigzag pattern (in other words, a plurality of fern zag grooves extending in the tire circumferential direction are arranged at intervals in the tire width direction in the center part of the tread surface). ) has been proposed. However, in this rib-lug type pneumatic tire, the rib portion cannot be sufficiently zigzag because of the emphasis on steering stability, wear resistance, and uneven wear resistance, so traction performance is still lacking. That was enough. In addition, after the middle stage of wear during use, the grooves are zigzag, which has the disadvantage of inferior handling stability, drainage performance, and fuel efficiency compared to a pneumatic tire with the same remaining groove depth or a flat tire. .
第６図（Ａ）に従来のりプラグタイプの空気入りタイヤ
の新品時におけるトレッドパターンの一例を示す。第６
図（Ａ）においては、トレッド表面１のセンター部には
タイヤ周方向ＥＥに３木のジグザク溝２が配されて、こ
れらの溝間に２木のジグザグ状のリブ３が形成されてお
り、また、ショルダー部にはタイヤ周方向ＥＥに間隔を
おいて複数の幅方向溝４が設けられて２木のリブ５が形
成されてい線溝が段落部を介して交互に連結した如くに
形成し、（ｂｌ該ジグザグ溝の一方の側壁を放射方向に
対してリブの内側方向に傾斜角度βが５°≦β≦２５°
となるように傾斜させ、（Ｃ１該ジグザグ溝の前記段落
部をタイヤ周方向に対する傾斜角度αが６０゜≦α≦９
０６となるように傾斜させ、（ｄｌ該ジグザグ溝の前記
周方向直線溝のタイヤ周方向長さＢをジグザグ溝のピッ
チ長さＰに対して１／６Ｐ≦Ｂ≦１／３Ｐとしたことを
特徴とする空気入りタイヤを要旨とする。FIG. 6(A) shows an example of a tread pattern of a conventional glue plug type pneumatic tire when new. 6th
In Figure (A), three zigzag grooves 2 are arranged in the tire circumferential direction EE in the center part of the tread surface 1, and two zigzag ribs 3 are formed between these grooves. In addition, a plurality of width direction grooves 4 are provided at intervals in the tire circumferential direction EE in the shoulder portion, and two ribs 5 are formed so that the line grooves are connected alternately via the stepped portions. , (bl One side wall of the zigzag groove is inclined at an inclination angle β of 5°≦β≦25° in the inner direction of the rib with respect to the radial direction.
(C1) The step part of the zigzag groove has an inclination angle α of 60°≦α≦9 with respect to the tire circumferential direction.
06, and (dl) that the tire circumferential length B of the circumferential straight groove of the zigzag groove is 1/6P≦B≦1/3P with respect to the pitch length P of the zigzag groove. This article focuses on pneumatic tires with special characteristics.
以下、図を参照してこの手段につき詳しく説明する。な
お、第６図（Ａ）、 （Ｂ）におけると同様の部位、
溝、リブ等を同じ番号で示す。This means will be explained in detail below with reference to the drawings. In addition, the same parts as in FIGS. 6(A) and (B),
Grooves, ribs, etc. are indicated by the same number.
第１図は、本発明の空気入りタイヤのトレッドパターン
を示す平面視説明図である。第１図では、第６図（Ａ）
におけると同様に、トレッド表面１のセンター部にはタ
イヤ周方向ＥＥに３本のジグザグ溝２が配されて、こる
。第６図（Ｂ）は、このタイヤの摩耗７０％時のトレッ
ドパターンを示す。第〔１図（Ｉ３ ）から判るように
、摩耗７０％時にはジグザク７Ｍ２は細くなってはいる
が未だジグザグ形状を保持しているため、同じ残溝深さ
を有するりブタイブの空気入りタイヤに比して操縦安定
性、排水性、燃費性に劣る。FIG. 1 is an explanatory plan view showing the tread pattern of the pneumatic tire of the present invention. In Figure 1, Figure 6 (A)
As in , three zigzag grooves 2 are arranged in the center portion of the tread surface 1 in the tire circumferential direction EE. FIG. 6(B) shows the tread pattern of this tire at 70% wear. As can be seen from Figure 1 (I3), at 70% wear, the Zigzag 7M2 still maintains its zigzag shape, although it becomes thinner, so it is compared to a flat pneumatic tire with the same remaining groove depth. This results in poor handling stability, drainage performance, and fuel efficiency.
本発明は、使用初期（摩耗中期以前）においてはトラク
ション性能に優れ、摩耗中期以降においては操縦安定性
、排水性、燃費性に優れたりプラグタイプの空気入りタ
イヤを提供することを目的とする。An object of the present invention is to provide a plug-type pneumatic tire that has excellent traction performance in the initial stage of use (before the middle stage of wear) and excellent handling stability, drainage performance, and fuel efficiency after the middle stage of wear.
本発明は、トレッド表面のセンター部にタイヤ周方向に
延びる複数のジグザグ溝をタイヤ幅方向に間隔をおいて
配置すると共にトレッド表面のショルダー部にタイヤ周
方向に間隔をおいて複数の幅方向溝を設けたタイヤにお
いて、（ａｌ前記ジグザグ溝を複数の周方向直れらの溝
間に２本のジグザグ状のリブ３が形成されており、また
、ショルダー部にはタイヤ周方向ＥＥに間隔をおいて複
数の幅方向溝４が設けられて２本のリブ５が形成されて
いる。ジグザグ溝２は、タイヤ幅方向に間隔をおいて複
数個設ければよい。The present invention has a plurality of zigzag grooves extending in the tire circumferential direction arranged at intervals in the tire width direction in the center part of the tread surface, and a plurality of width direction grooves arranged in the tire width direction at intervals in the tire width direction in the shoulder part of the tread surface. In a tire provided with (al), two zigzag-shaped ribs 3 are formed between a plurality of circumferentially perpendicular grooves, and two zigzag-shaped ribs 3 are formed in the shoulder part at intervals in the tire circumferential direction EE. A plurality of widthwise grooves 4 are provided to form two ribs 5. A plurality of zigzag grooves 2 may be provided at intervals in the tire width direction.
（ａ＋ このジグザグａ２は、複数の周方向直線溝１
０が段落部１１を介して交互に連結した如くに形成され
る。(a+ This zigzag a2 is a plurality of circumferential straight grooves 1
0 are alternately connected via the stepped portions 11.
摩耗中期以降において、このジグザグ溝２を直線溝に近
い形状に変化させるためである。This is to change the zigzag groove 2 into a shape close to a straight groove after the middle stage of wear.
これにより、リブタイプのタイヤとし゛ζ機能すること
が可能となる。This allows it to function as a rib-type tire.
（ｂｌ ジグザグａ２の一方の側壁を放射方向に対し
てリブの内側方向に傾斜角度βが５゜≦β≦２５°とな
るように傾斜させる。(bl) One side wall of the zigzag a2 is inclined toward the inner side of the rib with respect to the radial direction so that the inclination angle β satisfies 5°≦β≦25°.
第２図（Ａ）に第１図におけるＡ−Ａ’綿断面を示す。FIG. 2(A) shows a cross section of the A-A' cotton in FIG. 1.
なお、第２図（Ｂ）は、参考のために、従来の空気入り
タイヤの溝断面を示したものである。In addition, FIG. 2(B) shows a groove cross section of a conventional pneumatic tire for reference.
第２図（Ａ）に示すように、ジグザグ溝２の一方の側壁
を放射方向Ｔに対してリブの内側方向に傾斜角度βで傾
斜させる。Ｍはリブを表わす。放射方向Ｔとは、トレッ
ド表面からタイヤ中ｒＣ，−Ｌこ向う方向をいう。ジグ
ザグ溝２の他方の側壁は、放射方向′Ｆに対して傾斜角
度γで上記一方の側壁と同方向に傾斜させればよい。な
お、従来の空気入りタイヤでは、第２図（Ｂ）に示すよ
うに両方の側壁が互いに徐々に接近するように７字型に
傾斜している。As shown in FIG. 2(A), one side wall of the zigzag groove 2 is inclined with respect to the radial direction T toward the inner side of the rib at an inclination angle β. M represents a rib. The radial direction T refers to the direction from the tread surface to rC, -L in the tire. The other side wall of the zigzag groove 2 may be inclined in the same direction as the one side wall at an inclination angle γ with respect to the radial direction 'F. In addition, in a conventional pneumatic tire, both side walls are inclined in a figure 7 shape so as to gradually approach each other, as shown in FIG. 2(B).
このようにジグザグａ２の一方の側壁を傾斜させること
によりトレッド表面ｌにおいてリブとジグザグａ２との
境界部に鋭角的な突起部分Ｒが生じ、この突起部分Ｒの
エツジ効果により走行時においてトラクション性を向上
させることができる。By inclining one side wall of the zigzag a2 in this way, an acute protrusion R is created at the boundary between the rib and the zigzag a2 on the tread surface l, and the edge effect of this protrusion R improves traction during running. can be improved.
傾斜角度βは、５°≦β≦２５°の範囲とする。５°〉
βでは前記の突起部分Ｒのラジアル方向における突出量
が小さくなり、エツジ様の最小単位の長さである。The inclination angle β is in the range of 5°≦β≦25°. 5°〉
At β, the amount of protrusion of the protruding portion R in the radial direction becomes small, and the length is the minimum unit length of an edge.
さらに、ジグザグ溝２の周方向直線溝１０の幅はトレッ
ド接地幅Ｗの３％〜１１％で、段落部１１の幅はトレッ
ド接地幅Ｗの６％〜２０％であるとよい。この範囲より
も小さいとジグザグ溝２を設けた意味がなくなり、一方
、この範囲を超えると摩耗中期以降において、ジグザグ
溝２を直線溝に近い形状に変化させることができなくな
るからである。Furthermore, the width of the circumferential linear groove 10 of the zigzag groove 2 is preferably 3% to 11% of the tread contact width W, and the width of the stepped portion 11 is preferably 6% to 20% of the tread contact width W. This is because if it is smaller than this range, there is no point in providing the zigzag groove 2, and on the other hand, if it exceeds this range, it becomes impossible to change the zigzag groove 2 into a shape close to a straight groove after the middle stage of wear.
第３図（Ａ）に本発明のりプラグタイプの空気入りタイ
ヤの使用初期におけるトレッドパターンの一例を示す。FIG. 3(A) shows an example of the tread pattern of the glue plug type pneumatic tire of the present invention at the initial stage of use.
また、第３図（Ｂ）に、このタイヤの摩耗７０％時のト
レッドパターンを示す。第３図（Ｂ）から判るように、
摩耗７０％時、すなわち摩耗中期以降においてはジグザ
グ溝２は細くなって直線溝に近い形状に変化している。Further, FIG. 3(B) shows the tread pattern of this tire at 70% wear. As can be seen from Figure 3 (B),
At 70% wear, that is, after the middle stage of wear, the zigzag groove 2 becomes thinner and changes into a shape close to a straight groove.
このため、摩耗中期以降においてはりブタイブのタイヤ
として機能することが可能となる。For this reason, it becomes possible to function as a beam-type tire after the middle stage of wear.
以下に実施例を示す。Examples are shown below.
効果がさほど期待できないため、優れたトラクション性
能を得ることができない。一方、β〉２５°では突起部
分Ｒの剛性の不足から偏摩耗が発生してしまう。また、
１０°≦Ｔ−β≦３５°であることが好ましい。Since the effect is not expected to be that great, excellent traction performance cannot be obtained. On the other hand, when β>25°, uneven wear occurs due to insufficient rigidity of the protruding portion R. Also,
It is preferable that 10°≦T−β≦35°.
（Ｃ１ジグザグ溝２の段落部１１をタイヤ周方向に対す
る傾斜角度αが６０６≦α≦９０°となるように傾斜さ
せる。(The stepped portion 11 of the C1 zigzag groove 2 is inclined so that the inclination angle α with respect to the tire circumferential direction satisfies 606≦α≦90°.
６０６〉αではエツジ効果が薄れてしまうため、優れた
トラクション性能を得ることができない。α〉９０°で
は突起部分Ｒの剛性の不足から偏摩耗が発生してしまう
。At 606>α, the edge effect is weakened, making it impossible to obtain excellent traction performance. When α>90°, uneven wear occurs due to insufficient rigidity of the protruding portion R.
Ｔｄｌ ジグザグ′ａ２の周方向直線溝１０のタイヤ
周方向長さＢをジグザグ溝２のピッチ長さＰに対して１
／６Ｐ≦Ｂ≦１／３Ｐとする。Tdl The tire circumferential length B of the circumferential straight groove 10 of zigzag'a2 is 1 for the pitch length P of the zigzag groove 2.
/6P≦B≦1/3P.
１／６Ｐ＞Ｂでは突起部分Ｒの剛性の不足から偏摩耗が
発生してしまう。また、Ｂ＞１／３Ｐでは段落部１１に
おける溝幅を十分にとることが難しくなってしまう。こ
こで、ピッチ長さとは、タイヤ周方向に連続する繰り返
し模〔実施例〕
本発明タイヤ（第１図、第２図（Ａ）、第３図（Ａ）の
トレッドパターン）、従来タイヤ（第６図（Ａ）のトレ
ッドパターン）、およびリブタイヤ（リブタイプのタイ
ヤ）について下記のような試験を行った。この場合、タ
イヤ・サイズ１０．０ＯＲ２０１４ＰＲ、空気圧７．２
５ ｋｇ／ ｅ艷、使用リム２０ Ｘ７．ＯＯＴとした
。When 1/6P>B, uneven wear occurs due to insufficient rigidity of the protruding portion R. Further, when B>1/3P, it becomes difficult to secure a sufficient groove width in the stepped portion 11. Here, the pitch length refers to continuous repeated patterns in the tire circumferential direction [Example] The present invention tire (tread patterns shown in FIGS. 1, 2 (A), and 3 (A)), the conventional tire (tread patterns shown in FIG. The following tests were conducted on the tread pattern shown in Figure 6 (A) and the ribbed tire (ribbed type tire). In this case, tire size 10.0OR2014PR, air pressure 7.2
5 kg/ e-ship, rim used 20 x 7. It was set as OOT.
車両にそれぞれのタイヤを装着させ、一般の湿潤舗装路
の走行に際して車速４０ ｋｍ／ｈ、６０１ｖ／ｈ 、
８０ ｋｍ／ｈ 、 １００ ｋｍ／ｈのときにぶレ
ーキをかけ、そのときの制動距離（ブレーキをかけたと
きから停止するまでに車両が走行した距離）を測定した
。この結果を第４図に指数で示す。Each tire was attached to the vehicle, and the vehicle speed was 40 km/h, 601 v/h, when driving on a general wet paved road.
Brakes were applied at speeds of 80 km/h and 100 km/h, and the braking distance (distance traveled by the vehicle from when the brakes were applied until it stopped) was measured. The results are shown in FIG. 4 as an index.
第４図から、本発明タイヤがいずれの車速においても制
動距離が短いことが判る。したがって、本発明タイヤは
、使用初期においてトラクション性に優れている。From FIG. 4, it can be seen that the tire of the present invention has a short braking distance at any vehicle speed. Therefore, the tire of the present invention has excellent traction properties at the initial stage of use.
■ さ８ｍｍ における ６ の跋験：
残溝深さ８ｎ＋ｍ（摩耗中期）のそれぞれのタイヤを車
両に装着させ、一般の舗装路を走行してフィーリングに
より操縦安定性を評価した。この結果を指数で下記表１
に示す。■ 6 trials at 8 mm: Each tire with a residual groove depth of 8 n+m (mid-wear stage) was mounted on a vehicle, and the vehicle was driven on a regular paved road to evaluate the handling stability based on feeling. This result is expressed as an index in Table 1 below.
Shown below.
表１から、本発明タイヤが操縦安定性においてリブタイ
ヤと同等であることが判る。なお、新品時のタイヤの溝
深さはりプラグタイヤでは１６ ｍｍであり、リブタイ
ヤでは１３．５ｍｍである。From Table 1, it can be seen that the tires of the present invention are equivalent to ribbed tires in handling stability. Note that the groove depth of new tires is 16 mm for plug tires and 13.5 mm for rib tires.
（来夏以下余白）
４゜
降においては溝形状が直線溝に近づくために操縦安定性
、排水性、燃費性に優れたりブタイブのタイヤとして機
能することが可能となる。(Leaving space below next summer) At 4 degrees of rain, the groove shape approaches a straight groove, making it possible to have excellent handling stability, drainage, and fuel efficiency, and to function as a piggy-back tire.
第１図は本発明の空気入りタイヤのトレッドパターンを
示す平面視説明図、第２図（Ａ）は第１図におけるＡ−
Ａ’線断面説明図、第２図（Ｂ）は従来の空気入りタイ
ヤの溝断面を示す説明図である。
第３図（Ａ＞は本発明の空気入りタイヤの新品時におけ
るトレッドパターンの一例を示す平面視説明図、第３図
（Ｂ）は、このタイヤの摩耗７０％時のトレッドパター
ンを示す平面視説明図である。
第４図は車速と制動距離との関係図、第５図はドラム試
験機による転がり抵抗の測定結果をグラフで示した説明
図である。
第６図（Ａ）は従来のりプラグタイプの空気入りタイヤ
の新品時におけるｌ・レソドパタ紅
ｎニ
ドラム試験機により、ドラム回転速度４０ｋｍ／ｈ、
６０ ｋｍ／ｈ 、 ８０ ｆｏｎ／ｈ 、 １００
ｋｍ／ｈ、１２０ｋｍ／ｈのときの転がり抵抗を測定し
た。この結果を第５図に指数で示す。
第５図から、本発明タイヤが転がり抵抗においてリブタ
イヤと同等であることが判る。
〔発明の効果〕
以上説明したように本発明は、リブラグタイプのタイヤ
であって前記（ａｌ〜（ｄ）を要件としたから、摩耗中
期以前においてはエツジ効果により従来のりプラグタイ
プのタイヤに比してトラクション性に優れると共に摩耗
中！Ｉ１１以−ンの一例を示す平面視説明図、第６図（
Ｂ）は、このタイヤの摩耗７０％時のトレッドパターン
を示す平面視説明図である。
１・・・トレッド表面、２・・・ジグザグ溝、３・・・
リブ、４・・・幅方向溝、５・・・リブ、１０・・・周
方向直線溝、１１・・・段落部。FIG. 1 is a plan view explanatory diagram showing the tread pattern of the pneumatic tire of the present invention, and FIG.
FIG. 2B is an explanatory diagram showing a groove cross section of a conventional pneumatic tire. FIG. 3 (A> is a plan view explanatory diagram showing an example of the tread pattern of the pneumatic tire of the present invention when it is new, and FIG. 3 (B) is a plan view illustration showing the tread pattern of this tire when it is worn at 70%. It is an explanatory diagram. Fig. 4 is a diagram showing the relationship between vehicle speed and braking distance, and Fig. 5 is an explanatory diagram showing the measurement results of rolling resistance using a drum testing machine in a graph. Fig. 6 (A) is an explanatory diagram showing the relationship between vehicle speed and braking distance. When a plug-type pneumatic tire is new, the drum rotation speed is 40 km/h,
60 km/h, 80 fon/h, 100
km/h, and the rolling resistance at 120 km/h was measured. The results are shown in FIG. 5 using indices. From FIG. 5, it can be seen that the tire of the present invention has rolling resistance equivalent to that of a ribbed tire. [Effects of the Invention] As explained above, since the present invention is a lublug type tire and has the above requirements (al to (d)), the edge effect will cause it to deteriorate compared to the conventional glue plug type tire before the middle stage of wear. Fig. 6 is a plan view explanatory diagram showing an example of I11 and above, which has excellent traction properties and is worn out.
B) is an explanatory plan view showing the tread pattern of this tire at 70% wear. 1...Tread surface, 2...Zigzag groove, 3...
Rib, 4... Width direction groove, 5... Rib, 10... Circumferential direction linear groove, 11... Step portion.
Claims (1)
て配置すると共にトレッド表面のショルダー部にタイヤ
周方向に間隔をおいて複数の幅方向溝を設けたタイヤに
おいて、（ａ）前記ジグザグ溝を複数の周方向直線溝が
段落部を介して交互に連結した如くに形成し、（ｂ）該
ジグザグ溝の一方の側壁を放射方向に対してリブの内側
方向に傾斜角度βが５゜≦β≦２５゜となるように傾斜
させ、（ｃ）該ジグザグ溝の前記段落部をタイヤ周方向
に対する傾斜角度αが６０゜≦α≦９０゜となるように
傾斜させ、（ｄ）該ジグザグ溝の前記周方向直線溝のタ
イヤ周方向長さＢをジグザグ溝のピッチ長さＰに対して
１／６Ｐ≦Ｂ≦１／３Ｐとしたことを特徴とする空気入
りタイヤ。[Claims] A plurality of zigzag grooves extending in the tire circumferential direction are arranged at intervals in the tire width direction in the center part of the tread surface, and a plurality of zigzag grooves extending in the tire circumferential direction are arranged in the shoulder part of the tread surface at intervals in the tire circumferential direction. In a tire provided with directional grooves, (a) the zigzag groove is formed such that a plurality of circumferential straight grooves are alternately connected via stepped portions, and (b) one side wall of the zigzag groove is formed in a radial direction. (c) The stepped portion of the zigzag groove is inclined in the inner direction of the rib so that the inclination angle β is 5°≦β≦25°; (d) the tire circumferential length B of the circumferential straight groove of the zigzag groove is 1/6P≦B≦1/3P with respect to the pitch length P of the zigzag groove; A pneumatic tire featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63309917A JPH02155808A (en) | 1988-12-09 | 1988-12-09 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63309917A JPH02155808A (en) | 1988-12-09 | 1988-12-09 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02155808A true JPH02155808A (en) | 1990-06-14 |
Family
ID=17998899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63309917A Pending JPH02155808A (en) | 1988-12-09 | 1988-12-09 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02155808A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246049A (en) * | 1991-03-12 | 1993-09-21 | Continental Aktiengesellschaft | Pneumatic vehicle tire with wave-shaped circumferential grooves |
| EP0648622A1 (en) * | 1993-10-19 | 1995-04-19 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
| JP2002002226A (en) * | 2000-06-21 | 2002-01-08 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US6412531B1 (en) * | 1999-07-15 | 2002-07-02 | Michelin Recherche Et Technique S.A. | Tire tread having groove walls with compound contours |
| US6564841B2 (en) * | 2000-06-21 | 2003-05-20 | The Yokohama Rubber Co., Ltd | Pneumatic tire having zig-zag circumferential main grooves |
| CN103370214A (en) * | 2011-02-14 | 2013-10-23 | 株式会社普利司通 | Tread band with asymmetric grooves to reduce debris retention |
| US20220024256A1 (en) * | 2020-07-27 | 2022-01-27 | Hankook Tire & Technology Co., Ltd | Pneumatic tire with reinforcing part |
-
1988
- 1988-12-09 JP JP63309917A patent/JPH02155808A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246049A (en) * | 1991-03-12 | 1993-09-21 | Continental Aktiengesellschaft | Pneumatic vehicle tire with wave-shaped circumferential grooves |
| EP0648622A1 (en) * | 1993-10-19 | 1995-04-19 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
| US5567253A (en) * | 1993-10-19 | 1996-10-22 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| US6412531B1 (en) * | 1999-07-15 | 2002-07-02 | Michelin Recherche Et Technique S.A. | Tire tread having groove walls with compound contours |
| JP2002002226A (en) * | 2000-06-21 | 2002-01-08 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US6564841B2 (en) * | 2000-06-21 | 2003-05-20 | The Yokohama Rubber Co., Ltd | Pneumatic tire having zig-zag circumferential main grooves |
| US6595254B2 (en) * | 2000-06-21 | 2003-07-22 | The Yokohama Rubber Co., Ltd. | Pneumatic tire including zig-zag main grooves |
| CN103370214A (en) * | 2011-02-14 | 2013-10-23 | 株式会社普利司通 | Tread band with asymmetric grooves to reduce debris retention |
| CN103370214B (en) * | 2011-02-14 | 2015-12-09 | 株式会社普利司通 | There is asymmetric groove to reduce the tread contour of foreign body retention |
| US20220024256A1 (en) * | 2020-07-27 | 2022-01-27 | Hankook Tire & Technology Co., Ltd | Pneumatic tire with reinforcing part |
| US11752804B2 (en) * | 2020-07-27 | 2023-09-12 | Hankook Tire & Technology Co., Ltd | Pneumatic tire with reinforcing part |
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