JP3251634B2 - Pneumatic tire with excellent drainage performance - Google Patents
Pneumatic tire with excellent drainage performanceInfo
- Publication number
- JP3251634B2 JP3251634B2 JP09073192A JP9073192A JP3251634B2 JP 3251634 B2 JP3251634 B2 JP 3251634B2 JP 09073192 A JP09073192 A JP 09073192A JP 9073192 A JP9073192 A JP 9073192A JP 3251634 B2 JP3251634 B2 JP 3251634B2
- Authority
- JP
- Japan
- Prior art keywords
- tread
- groove
- sub
- pneumatic tire
- edge
- 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.)
- Expired - Fee Related
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
- B60C11/0304—Asymmetric patterns
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】降雨、降雪によって濡れた道路表
面上を車両が運行されるとき、この車両の全荷重を分担
支持して転動する空気入りタイヤのトレッド接地域内か
ら適切な排水を成就することは、車両の運転操作上とく
に重要な応急的な制動性能を確保するために不可欠であ
り、このような排水性能の改善向上を有利に実現できる
新規な着想を具体化した、排水性能に優れる空気入りタ
イヤをここに提案しようとするものである。[Industrial application] When a vehicle is driven on a road surface wet by rainfall or snowfall, appropriate drainage from the tread contact area of a pneumatic tire that rolls while supporting the entire load of the vehicle is shared. Fulfillment is indispensable to secure emergency braking performance, which is particularly important for vehicle operation, and the drainage performance that embodies a new idea that can advantageously achieve such improvement in drainage performance An excellent pneumatic tire is proposed here.
【０００２】[0002]
【従来の技術】特開昭55-140604 号公報には、タイヤト
レッドに関してその陸対海の比率を限定したトレッドパ
ターンについての横溝（副溝）の配列角度それも単一方
向性を主眼とする、タイヤの湿式グリップ増強が論じら
れ、また単一方向性パターンをもつタイヤについては、
特公平3-82610 号、特公昭63-305008 号各公報にも開示
されている。2. Description of the Related Art Japanese Patent Laying-Open No. 55-140604 discloses an arrangement angle of lateral grooves (sub-grooves) in a tread pattern in which a land-to-sea ratio is limited with respect to a tire tread. , The wet grip enhancement of tires is discussed, and for tires with a unidirectional pattern,
It is also disclosed in Japanese Patent Publication No. 3-82610 and Japanese Patent Publication No. 63-305008.
【０００３】[0003]
【発明が解決しようとする課題】排水性を向上させるよ
うに配慮された上掲のような在来のトレッドパターンに
あっても、横溝（副溝）とたての主溝との交差部におい
て溝内の排水流動に乱れを生じて、副溝から接地域外へ
向かう排水が阻害され、その停滞により、路面とトレッ
ドとの間に浸水を生じてタイヤ摩擦の低下をもたらす不
利が、なお払拭されていなかったことに着目してこの発
明は、副溝の溝壁に、排水の促進機能を付与し、これに
よってトレッド陸部と路面との間への浸水を防いで、排
水性能の一層の改善向上を図ったものである。Even in the above-mentioned conventional tread pattern designed to improve drainage, even at the intersection between the horizontal groove (sub groove) and the main groove just formed. Disturbance in the flow of drainage in the groove causes obstruction of drainage from the sub-groove to the outside of the contact area, and the stagnation causes water between the road surface and the tread to reduce tire friction. Noting that this was not done, the present invention provides a drainage promoting function to the groove wall of the sub-groove, thereby preventing inundation between the tread land portion and the road surface, further improving drainage performance. This is an improvement.
【０００４】[0004]
【課題を解決するための手段】この発明は、トレッドに
開口してその外周に沿う配列になる複数の主溝と、同様
にしてトレッドの中央域からトレッドの両側縁に向けそ
れぞれ退行傾斜して上記主溝と交差する配列になる多数
の副溝とによって区画されている、矢筈状のトレッド陸
部配列に成り、その矢筈の分岐と逆向きに接地域へ進入
する回転を正転として車両に装着される、単一方向性パ
ターンを有する空気入りタイヤにおいて、トレッド陸部
の踏込み端縁を限定する、上記副溝の溝壁面が、退行傾
斜するその副溝の折れ曲がり部を境として相互に逆向き
に傾き、トレッド側縁に近づくにつれて踏込み端縁側か
ら溝底に向かって斜めに延びる畝状筋目を有することを
特徴とする、排水性能に優れる空気入りタイヤに関する
ものある。According to the present invention, there are provided a plurality of main grooves which are opened in a tread and are arranged along the outer periphery of the tread. It is divided by a number of sub-grooves that intersect with the main groove, and has a tread land-shaped arrangement in the shape of an arrowhead. In the pneumatic tire having a unidirectional pattern to be mounted, the groove wall surface of the sub-groove that defines the stepping edge of the tread land portion is opposite to each other at the bent portion of the sub-groove that is inclined backward. The present invention relates to a pneumatic tire having excellent drainage performance, characterized in that the tire has a ridge-like line that is inclined in the direction and extends obliquely from the stepping edge side toward the groove bottom as approaching the tread side edge.
【０００５】図１(a) ，(b) に、この発明に従う空気入
りタイヤについて二種類のトレッドの各一部分を展開し
て示し、図２(a) ，(b) は図１(a) のＡ−Ａ線に沿う断
面をあらわし、また図３(a) 〜(d) にて、図１(b) のＡ
−Ａ線に沿う断面を各様な実施要領にて示し、さらに図
４は図３(d) におけるＢ−Ｂ線上における断面をやはり
数種の実施要領について示した。図中１はトレッド、２
は主溝、３は副溝、そして４は主溝２，副溝３によって
区画されたトレッド陸部であり、図１に示すように副溝
３は、トレッド１に開口してその中央域からトレッド１
の両側縁に向けそれぞれ退行（図の下から上へ）傾斜し
て延び両端はトレッド１の各側縁に開通し、その間にト
レッド１の円周に沿う主溝２と交差し、かくして主溝２
と副溝３とによって矢筈状のトレッド陸部４の配列が形
成され、このトレッドパターンは、図１の矢印αで示し
たように、矢筈の分岐（上向き）と逆向きに接地域へ進
入する回転を正転として車両に装着される、単一方向性
パターンに成り、ここに副溝３の退行傾斜は、トレッド
の中央円周線に対しておよそ15°〜90°の範囲とされ
る。FIGS. 1 (a) and 1 (b) show parts of two types of treads of a pneumatic tire according to the present invention, respectively. FIG. 2 (a) and FIG. 3 (a) to 3 (d) show a cross section along the line AA.
Sections along the line A are shown in various manners, and FIG. 4 shows sections along the line BB in FIG. In the figure, 1 is a tread, 2
Is a main groove, 3 is a sub-groove, and 4 is a tread land portion defined by the main groove 2 and the sub-groove 3. As shown in FIG. Tread 1
Each of the treads 1 extends inclining (from the bottom to the top in the figure) inwardly and retreats toward both side edges, and both ends are opened to the respective side edges of the tread 1, and intersect with the main grooves 2 along the circumference of the tread 1, and thus the main grooves 2
An array of tread land portions 4 in the shape of an arrowhead is formed by the subgroove 3 and the tread pattern. As shown by an arrow α in FIG. 1, this tread pattern enters the contact area in a direction opposite to the branch (upward) of the arrowhead. This results in a unidirectional pattern that is mounted on the vehicle with rotation as forward rotation, wherein the regression slope of the sub-groove 3 is in the range of approximately 15 ° to 90 ° with respect to the central circumferential line of the tread.
【０００６】そしてこの発明においては、トレッド陸部
４の踏込み端縁4aを限定する、副溝３の溝壁面3aに、図
２(a) ，(b) に示すように、退行傾斜するその副溝の折
れ曲がり部を境として相互に逆向きに傾斜して、トレッ
ド側縁に近づくにつれて踏込み端縁側から溝底の方へ向
かって斜めに延びる畝状筋目4bを設ける。この畝状筋目
4bは、図２(a) に比し図２(b) のようにトレッド陸部表
面に対する交角が増加した何れも直線状の配列とか、さ
らに交角が増加した図３(a) のような、また図３(b) ，
(c) のような曲線状の配列になる、何れも細溝であって
もよいが、これらだけに限らず、図３(d) にて実線で表
した突起ｐと破線の凹窪ｆからなるものとしてもよく、
このような凹凸は同図(d) の場合をそのＢ−Ｂ断面につ
き図４(a) 〜(d) で示すように、三角山形の凹凸、台形
の凸部と谷形凹部、波形凹凸、小溝と小突起の交互配列
のように変形してもよい。According to the present invention, as shown in FIGS. 2 (a) and 2 (b), the sub-groove wall surface 3a of the sub-groove 3, which defines the stepping edge 4a of the tread land portion 4, is inclined backward. A ridge-shaped streak 4b is provided, which is inclined in the opposite direction from the bent portion of the groove and extends obliquely from the stepping edge toward the groove bottom as approaching the tread side edge. This ridge
4b shows a linear arrangement in which the intersection angle with respect to the tread land portion surface is increased as shown in FIG. 2 (b) compared to FIG. 2 (a), or as shown in FIG. 3 (a) in which the intersection angle is further increased. Fig. 3 (b)
3 (c), any of which may be a narrow groove, but is not limited to these. The protrusion p represented by a solid line and the concave recess f represented by a broken line in FIG. May be
As shown in FIGS. 4 (a) to 4 (d), in the case of FIG. 4 (d), as shown in FIGS. 4 (a) to 4 (d) in the case of FIG. It may be deformed like an alternate arrangement of small grooves and small projections.
【０００７】[0007]
【作用】退行傾斜配列の副溝３によって形成される矢筈
状の、トレッド陸部４の配列になる単一方向性パターン
の下で、各トレッド陸部４を区画する副溝３の溝壁面3a
が畝状筋目4bをそなえているので、空気入りタイヤの図
１に示した矢印αの向きの回転により、トレッド陸部４
が矢筈の分岐とは逆向きに次々と接地域へ侵入するとき
に、トレッド陸部４の踏込み端縁4aによって路表上から
かきとられた水膜は、畝状筋目4bに沿って隣接主溝２又
はトレッド１の側端へ放散される。従って副溝内に停滞
していた水を主溝２又はトレッド１の両側縁に向けて有
利に排出可能となる。また畝状筋目4bは、トレッド陸部
４の踏込み端縁4aにおける剛性の低下をもたらし、これ
により該踏込み端縁4aが路面と接するときの衝撃を緩和
することとなるので、陸部４の路面への衝突に起因する
タイヤ騒音も少なくなる。The groove wall surface 3a of the sub-groove 3 that divides each tread land portion 4 under an arrow-shaped unidirectional pattern formed by the recessed and inclined sub-grooves 3 and arranged in the tread land portion 4 arrangement.
Since There has been provided with a ridged streaks 4b, the rotation of the direction of the arrow α shown in FIG. 1 of the pneumatic tire, the tread land portions 4
The water film scraped off from the road surface by the stepping edge 4a of the tread land portion 4 when entering the contact area one after another in the direction opposite to the branch of the arrowhead, along the ridge line 4b Dissipated to the side edges of the groove 2 or tread 1. Therefore, the water stagnated in the sub-groove can be advantageously drained toward both sides of the main groove 2 or the tread 1. Further, the ridges 4b reduce the rigidity of the tread edge 4a of the tread land portion 4 and thereby reduce the impact when the tread edge 4a comes into contact with the road surface. The tire noise caused by the collision with the tire is also reduced.
【０００８】[0008]
【実施例】タイヤサイズ195/70R14 で表される空気入り
タイヤを図１(a) 及び図１(b) に示したトレッドパター
ンの下に試作して、平均水深２mmで滞水を生じさせた試
験場で車速80km/hにて走行中に制動をかけて停車させ、
制動距離を測定し、本発明に従い畝状筋目を有する適合
例とそれを有しない比較例とを対比した。EXAMPLE A pneumatic tire having a tire size of 195 / 70R14 was prototyped under the tread pattern shown in FIGS. 1 (a) and 1 (b), and water retention was caused at an average water depth of 2 mm. At the test site, apply a brake while driving at a vehicle speed of 80 km / h and stop.
The braking distance was measured and the conforming example with ridges and the comparative example without it according to the invention were compared.
【表１】 [Table 1]
【０００９】なおここに試作タイヤは、副溝３の退行傾
斜角を、適合例、比較例ともにタイヤの赤道に対する交
角につき45°とし、また主溝２と副溝３の溝深さは８m
m、トレッド陸部４は30mm×20mmの平行四辺形のものを
２列もしくは３列と、同一表面積の小矢筈形のもの１列
及び、反対向き30mm×20mmの平行四辺形のもの１列もし
くは２列とを都合５列に配列した諸元についてすべて共
通にした。Here, in the prototype tire, the regression inclination angle of the sub-groove 3 is set to 45 ° at the intersection angle of the tire with respect to the equator in both the adaptation example and the comparative example, and the groove depth of the main groove 2 and the sub-groove 3 is 8 m.
m, tread land part 4 is 2 rows or 3 rows of 30 mm x 20 mm parallelograms, 1 row of small arrows with the same surface area, and 1 row of 30 mm x 20 mm parallelograms in opposite direction or All the specifications in which two rows and five rows were conveniently arranged were common.
【００１０】[0010]
【発明の効果】単一方向性パターンを区画する副溝の、
トレッド陸部の踏込み端を含む側の溝壁に畝状筋目を設
けることによって、副溝と主溝との交差部における排水
流動の乱れをなくし、排水促進機能を付与することによ
り、排水性能の一層の改善向上を実現することができ
る。According to the present invention, the sub-groove that defines the unidirectional pattern is
By providing ridge-shaped streaks on the groove wall on the side including the tread end of the tread land, turbulence of drainage flow at the intersection of the sub-groove and main groove is eliminated, and by providing a drainage promotion function, drainage performance is improved. Further improvement and improvement can be realized.
【図１】 トレッドの一部分の展開図である。FIG. 1 is a development view of a part of a tread.
【図２】 副溝壁面を示すタイヤの要部（図１のＡ−Ａ
線上）断面図である。FIG. 2 is an essential part of a tire showing a sub groove wall surface (AA in FIG. 1).
It is a sectional view (on a line).
【図３】 副溝壁面の別例を示す断面図である。FIG. 3 is a cross-sectional view showing another example of a sub-groove wall surface.
【図４】 図３(d) のＢ−Ｂ線における断面図である。FIG. 4 is a sectional view taken along line BB of FIG. 3 (d).
１ トレッド ２ 主溝 ３ 副溝 ３ａ 溝壁面 ４ トレッド陸部 ４ａ 踏込み端縁 ４ｂ 畆状筋目 Reference Signs List 1 tread 2 main groove 3 sub groove 3a groove wall surface 4 tread land portion 4a stepping edge 4b
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−334606（ＪＰ，Ａ) 特開 平３−57704（ＪＰ，Ａ) 実開 昭63−138203（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B60C 11/04 B60C 11/11 B60C 11/13 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-334606 (JP, A) JP-A-3-57704 (JP, A) JP-A-63-138203 (JP, U) (58) Field (Int.Cl. 7 , DB name) B60C 11/04 B60C 11/11 B60C 11/13
Claims (1)
になる複数の主溝と、同様にしてトレッドの中央域から
トレッドの両側縁に向けそれぞれ退行傾斜して上記主溝
と交差する配列になる多数の副溝とによって区画されて
いる、矢筈状のトレッド陸部配列に成り、その矢筈の分
岐と逆向きに接地域へ進入する回転を正転として車両に
装着される、単一方向性パターンを有する空気入りタイ
ヤにおいて、 トレッド陸部の踏込み端縁を限定する、上記副溝の溝壁
面が、退行傾斜するその副溝の折れ曲がり部を境として
相互に逆向きに傾き、トレッド側縁に近づくにつれて踏
込み端縁側から溝底に向かって斜めに延びる畝状筋目を
有することを特徴とする、排水性能に優れる空気入りタ
イヤ。1. A plurality of main grooves which are opened to the tread and are arranged along the outer periphery thereof, and in a similar manner, each of the plurality of main grooves is inclined backward from a central region of the tread toward both side edges of the tread so as to intersect with the main groove. Unidirectionality, which is mounted on the vehicle as a tread land arrangement in the shape of an arrowhead, which is divided by a number of sub-grooves, and which rotates forward into the contact area in the direction opposite to the branch of the arrowhead. In a pneumatic tire having a pattern, the groove wall surface of the sub-groove, which defines the tread edge of the tread land portion, is inclined in opposite directions to each other with the bent portion of the sub-groove which is inclined backward, and the tread side edge is formed. A pneumatic tire excellent in drainage performance, characterized by having ridges extending obliquely from the stepping edge side toward the groove bottom as approaching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09073192A JP3251634B2 (en) | 1992-04-10 | 1992-04-10 | Pneumatic tire with excellent drainage performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09073192A JP3251634B2 (en) | 1992-04-10 | 1992-04-10 | Pneumatic tire with excellent drainage performance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05286313A JPH05286313A (en) | 1993-11-02 |
| JP3251634B2 true JP3251634B2 (en) | 2002-01-28 |
Family
ID=14006712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09073192A Expired - Fee Related JP3251634B2 (en) | 1992-04-10 | 1992-04-10 | Pneumatic tire with excellent drainage performance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3251634B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0820885A3 (en) * | 1996-07-24 | 1998-07-08 | Bridgestone Corporation | Pneumatic tire |
| US6866076B2 (en) * | 2000-02-07 | 2005-03-15 | Bridgestone Corporation | Tire having longitudinally extending smaller grooves formed in the walls of a groove |
| US6415835B1 (en) * | 2000-06-08 | 2002-07-09 | The Goodyear Tire & Rubber Company | Pneumatic tire tread having groove with peaks and valleys |
| JP2002301909A (en) * | 2001-01-30 | 2002-10-15 | Bridgestone Corp | Pneumatic tire |
| JP4467038B2 (en) * | 2003-05-27 | 2010-05-26 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP4495223B2 (en) * | 2008-02-18 | 2010-06-30 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP5768409B2 (en) * | 2011-03-02 | 2015-08-26 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5803163B2 (en) * | 2011-03-10 | 2015-11-04 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6144983B2 (en) * | 2013-07-16 | 2017-06-07 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP7145066B2 (en) * | 2018-12-27 | 2022-09-30 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tire |
-
1992
- 1992-04-10 JP JP09073192A patent/JP3251634B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05286313A (en) | 1993-11-02 |
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