JP2003211922A - Radial tire - Google Patents
Radial tireInfo
- Publication number
- JP2003211922A JP2003211922A JP2002011750A JP2002011750A JP2003211922A JP 2003211922 A JP2003211922 A JP 2003211922A JP 2002011750 A JP2002011750 A JP 2002011750A JP 2002011750 A JP2002011750 A JP 2002011750A JP 2003211922 A JP2003211922 A JP 2003211922A
- Authority
- JP
- Japan
- Prior art keywords
- sipe
- shoulder
- tire
- circumferential
- width
- 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
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
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
-
- 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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1218—Three-dimensional shape with regard to depth and extending 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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
- B60C11/1281—Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ショルダー片落ち
および偏摩耗を防止するとともに、走行によるトレッド
の摩耗中後期における湿潤路面に対する排水性能、制動
性能、耐ハイドロプレーニング性等（以下「ウエット性
能」と総称する）の低下の抑制を図ったラジアルタイ
ヤ、特には小型トラック用ラジアルタイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents shoulder pieces from dropping and uneven wear, and drainage performance, braking performance, hydroplaning resistance and the like (hereinafter referred to as "wet performance") on a wet road surface in the middle and latter stages of wear of a tread during running. (Hereinafter collectively referred to as “radial tire”), particularly to a radial tire for a light truck.
【０００２】[0002]
【従来の技術】従来、トレッド部の踏面部に、タイヤ周
方向に延びる複数の周方向主溝と、この主溝に挟まれた
複数のリブとを備えたラジアルタイヤにおいては、複数
のリブのうちショルダーリブにはラグ溝を設けないよう
にすることにより偏摩耗の発生を防止することができる
ことが知られている。すなわち、かかるラグ溝を設ける
と、その前後で段差を生じ、所謂ヒールアンドトウ摩耗
を生じることが知られている。その一方で、ショルダー
リブには、ショルダー片落ちを防止するために、一般に
ショルダー片落ち防止用周方向サイプが設けられていた
（図１参照）。2. Description of the Related Art Conventionally, in a radial tire having a plurality of circumferential main grooves extending in the tire circumferential direction and a plurality of ribs sandwiched by the main grooves on a tread portion of a tread portion, It is known that uneven wear can be prevented by not providing a lug groove on the shoulder rib. That is, it is known that when such a lug groove is provided, a step is formed before and after the lug groove, which causes so-called heel and toe wear. On the other hand, the shoulder ribs are generally provided with a shoulder sipe prevention circumferential sipe in order to prevent the shoulder sliver from dropping (see FIG. 1).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記偏
摩耗を防止すべくショルダーリブにラグ溝を設けなかっ
た従来のラジアルタイヤにおいては、走行による摩耗に
よりウエット性能が大幅に低下することが分かった。か
かるウエット性能の低下を抑制することと偏摩耗発生の
防止を図ることとは二律背反的事項であり、これまで両
者ど同時に満足できる解決策は存在し得なかった。However, it has been found that in a conventional radial tire in which the shoulder rib is not provided with a lug groove in order to prevent the uneven wear, the wet performance is significantly deteriorated by the wear caused by running. Suppressing such a decrease in wet performance and preventing the occurrence of uneven wear are trade-offs, and up until now, there could not be a satisfactory solution for both.
【０００４】そこで本発明の目的は、ショルダー片落ち
および偏摩耗を防止するとともに、走行によるトレッド
の摩耗中後期におけるウエット性能の低下の抑制を図っ
たラジアルタイヤを提供することにある。Therefore, an object of the present invention is to provide a radial tire which prevents shoulder pieces from falling off and uneven wear, and suppresses deterioration in wet performance in the middle and middle stages of tread wear due to running.
【０００５】[0005]
【課題を解決するための手段】本発明者は、上記課題を
解決すべく、ラジアルタイヤのショルダー片落ち防止用
周方向サイプの形状等につき鋭意検討した結果、以下の
構成とすることにより前記課題を解決し得ることを見出
し、本発明を完成するに至った。すなわち、本発明は以
下の通りである。In order to solve the above-mentioned problems, the inventors of the present invention have made earnest studies on the shape of the circumferential sipe for preventing the shoulder piece from falling off of a radial tire, and as a result, have the following problems. The inventors have found that the above can be solved and have completed the present invention. That is, the present invention is as follows.
【０００６】（１）環状に形成されたトレッド部と、該
トレッド部の両端からタイヤ半径方向内側に配設された
一対のサイドウォール部と、該サイドウォール部のタイ
ヤ半径方向内側に連なるビード部とを具備し、前記トレ
ッド部の踏面部に、タイヤ周方向に延びる複数の周方向
主溝と、該周方向主溝に挟まれた複数のリブとを備え、
該複数のリブのうちショルダーリブにはラグ溝が存在せ
ず、かつショルダー片落ち防止用周方向サイプを有する
ラジアルタイヤにおいて、前記ショルダー片落ち防止用
周方向サイプの溝幅が走行による摩耗により徐々に広く
なることを特徴とするラジアルタイヤである。(1) A tread portion formed in an annular shape, a pair of sidewall portions arranged inside the tire radial direction from both ends of the tread portion, and a bead portion connected to the inside of the sidewall portion in the tire radial direction. The tread portion of the tread portion, a plurality of circumferential main grooves extending in the tire circumferential direction, and a plurality of ribs sandwiched in the circumferential main groove,
In a radial tire having no shoulder lug groove among the plurality of ribs and having a shoulder-side drop-preventing circumferential sipe, the groove width of the shoulder-piece drop-preventing circumferential sipe is gradually increased due to wear due to running. It is a radial tire that is characterized by widening.
【０００７】（２）前記（１）のラジアルタイヤにおい
て、前記ショルダー片落ち防止用周方向サイプの摩耗前
のトレッド表面での幅（ｔ1）が０．７〜２．０ｍｍで
あるラジアルタイヤである。(2) In the radial tire of (1) above, the width (t 1 ) on the tread surface before abrasion of the shoulder side drop preventing circumferential sipe is 0.7 to 2.0 mm. is there.
【０００８】（３）前記（１）または（２）のラジアル
タイヤにおいて、前記ショルダー片落ち防止用周方向サ
イプのタイヤ幅方向断面形状がフラスコ状であるラジア
ルタイヤである。(3) The radial tire of (1) or (2) above, wherein the shoulder sipe preventing circumferential sipe has a flask-shaped cross-sectional shape in the tire width direction.
【０００９】（４）前記（３）のラジアルタイヤにおい
て、前記フラスコ状のタイヤ幅方向断面の最大幅部分
（ｔ2）が前記幅（ｔ1）の１．５〜２倍であるラジアル
タイヤである。(4) The radial tire of (3) above, wherein the maximum width portion (t 2 ) of the flask-shaped tire width direction cross section is 1.5 to 2 times the width (t 1 ). is there.
【００１０】（５）前記（１）〜（４）のいずれかのラ
ジアルタイヤにおいて、前記ショルダー片落ち防止用周
方向サイプに適宜間隔で、走行による摩耗により該サイ
プに対し垂直方向に出現するパドル状サイプが設けられ
ているラジアルタイヤである。(5) In the radial tire according to any one of (1) to (4), the paddles appearing in a direction perpendicular to the sipe due to wear due to running at appropriate intervals in the shoulder side drop preventing circumferential sipe. It is a radial tire provided with a sipe.
【００１１】（６）前記（５）のラジアルタイヤにおい
て、前記パドル状サイプの、タイヤ幅方向最大長さ
（Ｘ）が前記幅（ｔ1）の３〜４倍であるラジアルタイ
ヤである。(6) The radial tire of (5) above, wherein the paddle-shaped sipe has a maximum tire width direction length (X) which is 3 to 4 times the width (t 1 ).
【００１２】（７）前記（５）または（６）のラジアル
タイヤにおいて、前記パドル状サイプが１ピッチ当り３
〜５箇所存在するラジアルタイヤである。(7) In the radial tire of (5) or (6), the paddle-shaped sipes are 3 per pitch.
It is a radial tire that exists in 5 places.
【００１３】[0013]
【発明の実施の形態】図１は、小型トラック用空気入り
ラジアルタイヤのトレッドの周辺を拡大して示す線図的
右半断面図である。図示する片側のトレッド１の踏面部
には、排水性確保に寄与する周方向主溝２ａ、２ｂと、
これら周方向主溝２ａ、２ｂによって画成された中央リ
ブ３ａ、３ｂと、ショルダーリブ４が形成されている。
本発明においては、このショルダーリブ４にはラグ溝は
存在しておらず、かつ、このショルダーリブ４にはショ
ルダー片落ち防止用周方向サイプ５が設けられている。
なお、図中、６は２層のベルト層からなるベルトであ
り、７はカーカスプライである。1 is a diagrammatic right half cross-sectional view showing an enlarged periphery of a tread of a pneumatic radial tire for a light truck. In the tread surface portion of the tread 1 on one side shown in the drawing, circumferential main grooves 2a and 2b that contribute to ensuring drainage,
Central ribs 3a and 3b defined by the circumferential main grooves 2a and 2b and shoulder ribs 4 are formed.
In the present invention, the shoulder rib 4 has no lug groove, and the shoulder rib 4 is provided with a shoulder sipe prevention circumferential sipes 5.
In the figure, 6 is a belt composed of two belt layers, and 7 is a carcass ply.
【００１４】本発明においては、このショルダー片落ち
防止用周方向サイプ５を利用して本発明の目的を達成し
得るものであり、そのタイヤ幅方向の断面形状を図２に
示す。本発明の好適例として図２中の（イ）に示すショ
ルダー片落ち防止用周方向サイプ５のタイヤ幅方向断面
形状はフラスコ状である。かかるフラスコ状とすること
により、走行によるトレッドの摩耗によりサイプ幅が徐
々に広くなり、排水性が向上しウエット性能の低下を抑
制することができる。In the present invention, the object of the present invention can be achieved by utilizing the shoulder piece drop preventing circumferential sipe 5, and the sectional shape in the tire width direction is shown in FIG. As a preferred example of the present invention, the shoulder side falling prevention circumferential sipe 5 shown in (a) of FIG. 2 has a flask-shaped cross-section in the tire width direction. With such a flask shape, the sipe width gradually increases due to wear of the tread due to running, drainage is improved, and deterioration of wet performance can be suppressed.
【００１５】本発明の他の好適例として図２中の（ロ）
に示すショルダー片落ち防止用周方向サイプ５のタイヤ
幅方向断面形状は、前記（イ）と同様にフラスコ状であ
るが、周方向に適宜間隔で、走行による摩耗によりサイ
プ５に対し垂直方向に出現するパドル状サイプ８が形成
されている。As another preferred example of the present invention, (b) in FIG.
The cross-sectional shape in the tire width direction of the shoulder sipe preventing circumferential sipe 5 shown in Fig. 6 is a flask shape similar to the above (a), but at a proper interval in the circumferential direction, it is perpendicular to the sipe 5 due to wear due to running. The paddle-shaped sipe 8 that appears is formed.
【００１６】なお、参考のために、従来のショルダー片
落ち防止用周方向サイプ１５のタイヤ幅方向断面形状を
（ハ）に示す。For reference, the sectional shape of the conventional shoulder sipe preventing circumferential sipe 15 in the tire width direction is shown in (c).
【００１７】図２の（イ）〜（ハ）に示すショルダー片
落ち防止用周方向サイプ５および１５は、走行による摩
耗により、図２に対応する図３の（イ）〜（ハ）に示す
ようにトレッド表面に出現することになる。すなわち、
図３の（イ）に示すショルダー片落ち防止用周方向サイ
プ５は、（ハ）に示すショルダー片落ち防止用周方向サ
イプ１５よりも幅が広くなっている。また、（ロ）に示
すショルダー片落ち防止用周方向サイプ５は、（イ）に
示すように幅が広くなるとともに、適宜間隔で、サイプ
５に対し垂直方向にパドル状サイプ８が出現し、エッジ
成分として作用することになる。すなわち、本発明に係
るショルダー片落ち防止用周方向サイプ５は、ショルダ
ーの片落ちを防止し、同時にショルダーリブに対するラ
グ溝の配置で問題となる偏摩耗を防ぎつつ、摩耗により
徐々にサイプ５が広がり、特にはエッジ成分としてのサ
イプ８の出現によりウエット性能の低下を良好に防止す
ることができる。The shoulder piece drop preventing circumferential sipes 5 and 15 shown in FIGS. 2A to 3C are shown in FIGS. 3A to 3C corresponding to FIG. 2 due to wear due to running. Will appear on the tread surface. That is,
The shoulder piece drop prevention circumferential sipe 5 shown in FIG. 3A is wider than the shoulder piece drop prevention circumferential sipe 15 shown in FIG. 3C. In addition, the shoulder piece drop prevention circumferential sipe 5 shown in (b) has a wide width as shown in (a), and paddle-shaped sipes 8 appear in the vertical direction with respect to the sipe 5 at appropriate intervals, It will act as an edge component. That is, the shoulder side drop prevention circumferential sipe 5 according to the present invention prevents the shoulder side drop, and at the same time prevents uneven wear which is a problem in the arrangement of the lug grooves with respect to the shoulder ribs, while the sipe 5 gradually increases due to wear. The spread, especially the appearance of the sipe 8 as the edge component, can favorably prevent the deterioration of the wet performance.
【００１８】図２および図３の（ロ）に示すショルダー
片落ち防止用周方向サイプ５とパドル状サイプ８とをシ
ョルダーリブに形成せしめるには、タイヤ製造時に図４
に示すサイプブレード１０を使用する。このサイプブレ
ード１０は断面がフラスコ状であり、１枚のサイプブレ
ード１０にこれと垂直方向に３〜５枚のパドル形状板１
１が配置されている。１個のサイプブレード１０はタイ
ヤ１ピッチ当り１枚使用し、１ピッチは２０〜５０ｍｍ
程度である。ブロックの剛性を考慮した場合、上述のよ
うに３〜５枚が適当である。In order to form the shoulder piece drop preventing circumferential sipe 5 and the paddle-shaped sipe 8 shown in FIGS.
The sipe blade 10 shown in is used. The sipe blade 10 has a flask-shaped cross section, and one sipe blade 10 has 3 to 5 paddle-shaped plates 1 in a direction perpendicular to the sipe blade 10.
1 is arranged. One sipe blade 10 is used for each pitch of the tire, and one pitch is 20 to 50 mm.
It is a degree. Considering the rigidity of the block, 3 to 5 sheets are suitable as described above.
【００１９】また、製造において、かかるサイプブレー
ド１０のタイヤ抜けを考慮した場合、サイプブレード１
０の上端の幅（ｔ1）は０．７〜２．０ｍｍであり、フ
ラスコ状の断面の最大幅部分（ｔ2）は前記幅（ｔ1）の
１．５〜２倍であり、さらにパドル形状板１１の、タイ
ヤ幅方向最大長さ（Ｘ）は前記幅（ｔ1）の３〜４倍で
あることが好ましい。Further, in consideration of the tire omission of the sipe blade 10 in manufacturing, the sipe blade 1 is taken into consideration.
The width (t 1 ) of the upper end of 0 is 0.7 to 2.0 mm, the maximum width portion (t 2 ) of the flask-shaped cross section is 1.5 to 2 times the width (t 1 ), and The maximum length (X) of the paddle-shaped plate 11 in the tire width direction is preferably 3 to 4 times the width (t 1 ).
【００２０】本発明のタイヤにおいては、トレッド踏面
部のショルダー領域の構造以外の構造および材料は、ラ
ジアルタイヤにおける技術分野の慣用に従い適宜定める
ことができ、特に制限されるべきものではない。本発明
は、特に、小型トラック用ラジアルタイヤに好適であ
る。In the tire of the present invention, the structure and material other than the structure of the shoulder region of the tread tread portion can be appropriately determined according to the customary practice in the technical field of radial tires and are not particularly limited. The present invention is particularly suitable for radial tires for light trucks.
【００２１】[0021]
【実施例】以下、本発明を実施例に基づき具体的に説明
する。実施例
図４に示すタイプのサイプブレード１０（ｔ1：１．０
ｍｍ．ｔ2：２．０ｍｍ，Ｘ：４．０ｍｍ，１ピッチ当
り４枚のパドル形状板）を用いてショルダー片落ち防止
用周方向サイプ５を形成せしめ、ショルダーリブにラグ
溝の存在しないサイズ１９５／８５Ｒ１６のタイヤ（実
施例）と、かかるショルダー片落ち防止用周方向サイプ
を形成せしめなかった以外は同様にして製造したタイヤ
（比較例）とを夫々製造した。これらタイヤを夫々２ト
ン車に装着して空気圧６００ｋＰａ、積荷半積の下、鉄
板上でウエットブレーキ性能の評価を行った。EXAMPLES The present invention will be specifically described below based on examples. Example A sipe blade 10 (t 1 : 1.0 of the type shown in FIG. 4
mm. t 2: 2.0mm, X: 4.0mm , brought form a circumferential sipe 5 for preventing the shoulder piece drop with one pitch per four paddle-shaped plate), the size does not exist in the lug grooves in the shoulder rib 195 / An 85R16 tire (Example) and a tire (Comparative Example) manufactured in the same manner except that the shoulder side drop preventing circumferential sipe was not formed were manufactured. Each of these tires was mounted on a 2-ton vehicle, and the wet brake performance was evaluated on an iron plate under an air pressure of 600 kPa and a half-load.
【００２２】評価は、ともに新品時のウエットブレーキ
性能を１００としたときの主溝５０％摩耗時の同性能を
評価した。この結果、主溝５０％摩耗時のウエットブレ
ーキ性能は、実施例が９５であったのに対し、比較例で
は７０と、大幅に低下していた。In both evaluations, the wet brake performance of a new product was set to 100, and the same performance was evaluated when the main groove was 50% worn. As a result, the wet brake performance at the time of 50% wear of the main groove was 95 in the example, but was 70 in the comparative example, which was a large decrease.
【００２３】[0023]
【発明の効果】以上説明してきたように、本発明のラジ
アルタイヤにおいては、ショルダー片落ちおよび偏摩耗
を防止するとともに、走行によるトレッドの摩耗中後期
におけるウエット性能の低下の抑制を図ることができ
る。As described above, in the radial tire of the present invention, shoulder piece drop and uneven wear can be prevented, and at the same time, it is possible to suppress the deterioration of wet performance in the middle and latter stages of wear of the tread due to running. .
【図１】本発明の一実施の形態に係るラジアルタイヤの
トレッドの周辺を拡大して示す線図的右半断面図であ
る。FIG. 1 is a diagrammatic right half cross-sectional view showing an enlarged periphery of a tread of a radial tire according to an embodiment of the present invention.
【図２】（イ）〜（ハ）は、夫々ショルダー片落ち防止
用周方向サイプのタイヤ幅方向の断面形状を示す拡大断
面図である。2A to 2C are enlarged cross-sectional views showing cross-sectional shapes in the tire width direction of the shoulder sipe prevention circumferential sipe, respectively.
【図３】（イ）〜（ハ）は、夫々図２（イ）〜（ハ）に
対応するショルダー片落ち防止用周方向サイプの走行に
よるトレッド摩耗後における平面図である。3 (a) to 3 (c) are plan views after tread wear due to running of the shoulder sipe drop prevention circumferential sipes corresponding to FIGS. 2 (a) to 2 (c), respectively.
【図４】本発明のタイヤの製造において好適に使用し得
るサイプブレードの斜視図である。FIG. 4 is a perspective view of a sipe blade that can be preferably used in the production of the tire of the present invention.
１ トレッド ２ａ、２ｂ 周方向主溝 ３ａ、３ｂ 中央リブ ４ ショルダーリブ ５，１５ ショルダー片落ち防止用周方向サイプ ６ ベルト ７ カーカスプライ ８ パドル状サイプ １０ サイプブレード １１ パドル形状板 1 tread 2a, 2b Circumferential main groove 3a, 3b Central rib 4 shoulder ribs 5,15 Shoulder shoulder drop prevention sipe 6 belts 7 Carcass ply 8 paddle-shaped sipes 10 Sipe Blade 11 Paddle-shaped plate
Claims (7)
ッド部の両端からタイヤ半径方向内側に配設された一対
のサイドウォール部と、該サイドウォール部のタイヤ半
径方向内側に連なるビード部とを具備し、前記トレッド
部の踏面部に、タイヤ周方向に延びる複数の周方向主溝
と、該周方向主溝に挟まれた複数のリブとを備え、該複
数のリブのうちショルダーリブにはラグ溝が存在せず、
かつショルダー片落ち防止用周方向サイプを有するラジ
アルタイヤにおいて、 前記ショルダー片落ち防止用周方向サイプの溝幅が走行
による摩耗により徐々に広くなることを特徴とするラジ
アルタイヤ。1. A tread portion formed in an annular shape, a pair of sidewall portions arranged inside the tire radial direction from both ends of the tread portion, and a bead portion connected to the inside of the sidewall portion in the tire radial direction. The tread portion of the tread portion, a plurality of circumferential main groove extending in the tire circumferential direction, and a plurality of ribs sandwiched by the circumferential main groove, the shoulder rib of the plurality of ribs Has no lug groove,
A radial tire having a shoulder side drop preventing circumferential sipe, wherein the groove width of the shoulder side drop preventing circumferential sipe is gradually widened due to wear due to running.
プの摩耗前のトレッド表面での幅（ｔ1）が０．７〜
２．０ｍｍである請求項１記載のラジアルタイヤ。2. The width (t 1 ) of the shoulder side drop preventing circumferential sipe on the tread surface before wear is from 0.7 to 0.7.
The radial tire according to claim 1, which is 2.0 mm.
プのタイヤ幅方向断面形状がフラスコ状である請求項１
または２記載のラジアルタイヤ。3. The tire width direction cross-sectional shape of the shoulder sipe for preventing shoulder drop is a flask shape.
Or the radial tire described in 2.
大幅部分（ｔ2）が前記幅（ｔ1）の１．５〜２倍である
請求項３記載のラジアルタイヤ。4. The radial tire according to claim 3, wherein the maximum width portion (t 2 ) of the cross section of the flask-shaped tire in the width direction is 1.5 to 2 times the width (t 1 ).
プに適宜間隔で、走行による摩耗により該サイプに対し
垂直方向に出現するパドル状サイプが設けられている請
求項１〜４のうちいずれか一項記載のラジアルタイヤ。5. The paddle-shaped sipe that appears in a direction perpendicular to the sipe due to wear due to running is provided at appropriate intervals on the shoulder piece drop prevention circumferential sipe. The radial tire described in the item.
大長さ（Ｘ）が前記幅（ｔ1）の３〜４倍である請求項
５記載のラジアルタイヤ。6. The radial tire according to claim 5, wherein a maximum tire width direction length (X) of the paddle-shaped sipe is 3 to 4 times the width (t 1 ).
５箇所存在する請求項５または６記載のラジアルタイ
ヤ。7. The paddle-shaped sipe is 3 to 3 per pitch.
The radial tire according to claim 5 or 6, which is present at five locations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002011750A JP3948961B2 (en) | 2002-01-21 | 2002-01-21 | Radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002011750A JP3948961B2 (en) | 2002-01-21 | 2002-01-21 | Radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003211922A true JP2003211922A (en) | 2003-07-30 |
| JP3948961B2 JP3948961B2 (en) | 2007-07-25 |
Family
ID=27649158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002011750A Expired - Fee Related JP3948961B2 (en) | 2002-01-21 | 2002-01-21 | Radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3948961B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008284872A (en) * | 2007-04-16 | 2008-11-27 | Toyo Tire & Rubber Co Ltd | Sipe blade and tire molded using the same |
| EP2442967B1 (en) * | 2009-06-19 | 2013-08-14 | Compagnie Generale Des Etablissements Michelin | Removable device for molding a flexible wall in the groove of a tire pattern |
| WO2016053307A1 (en) * | 2014-09-30 | 2016-04-07 | Compagnie Generale Des Etablissements Michelin | Stiffeners for sipe-molding members |
| JP2017222190A (en) * | 2016-06-13 | 2017-12-21 | 株式会社ブリヂストン | Pneumatic tire |
| CN109476103A (en) * | 2016-07-18 | 2019-03-15 | 米其林集团总公司 | It is intended for the variation thin plate of edge object in the mold of tyre vulcanization |
| CN110254142A (en) * | 2014-10-17 | 2019-09-20 | 米其林集团总公司 | Improved tire tread with tread groove |
| US11186054B2 (en) | 2015-09-30 | 2021-11-30 | Compagnie Generale Des Etablissements Michelin | Variable thickness sipes |
| US20220097457A1 (en) * | 2020-09-30 | 2022-03-31 | The Yokohama Rubber Co., Ltd. | Tire |
| US11338618B2 (en) | 2015-09-30 | 2022-05-24 | Compagnie Generale Des Etablissements Michelin | Egg crate sidewall features for sipes |
| US11718131B2 (en) * | 2016-12-28 | 2023-08-08 | Compagnie Generale Des Etablissements Michelin | Tread for a heavy goods vehicle tire |
-
2002
- 2002-01-21 JP JP2002011750A patent/JP3948961B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008284872A (en) * | 2007-04-16 | 2008-11-27 | Toyo Tire & Rubber Co Ltd | Sipe blade and tire molded using the same |
| EP2442967B1 (en) * | 2009-06-19 | 2013-08-14 | Compagnie Generale Des Etablissements Michelin | Removable device for molding a flexible wall in the groove of a tire pattern |
| WO2016053307A1 (en) * | 2014-09-30 | 2016-04-07 | Compagnie Generale Des Etablissements Michelin | Stiffeners for sipe-molding members |
| CN106794649A (en) * | 2014-09-30 | 2017-05-31 | 米其林集团总公司 | The reinforcer of sipe moulding part |
| US10882362B2 (en) | 2014-09-30 | 2021-01-05 | Compagnie Generale Des Etablissements Michelin | Stiffeners for sipe-molding members |
| US10773556B2 (en) | 2014-09-30 | 2020-09-15 | Compagnie Generale Des Etablissements Michelin | Tire tread comprising variable thickness sipes with multiple areas of reduced thickness |
| CN110254142A (en) * | 2014-10-17 | 2019-09-20 | 米其林集团总公司 | Improved tire tread with tread groove |
| CN110254142B (en) * | 2014-10-17 | 2021-10-15 | 米其林集团总公司 | Improved tire tread with sipes |
| US11186054B2 (en) | 2015-09-30 | 2021-11-30 | Compagnie Generale Des Etablissements Michelin | Variable thickness sipes |
| US11338618B2 (en) | 2015-09-30 | 2022-05-24 | Compagnie Generale Des Etablissements Michelin | Egg crate sidewall features for sipes |
| JP2017222190A (en) * | 2016-06-13 | 2017-12-21 | 株式会社ブリヂストン | Pneumatic tire |
| CN109476103A (en) * | 2016-07-18 | 2019-03-15 | 米其林集团总公司 | It is intended for the variation thin plate of edge object in the mold of tyre vulcanization |
| CN109476103B (en) * | 2016-07-18 | 2021-06-15 | 米其林集团总公司 | Variant sheet of a mold insert intended for tire vulcanization |
| US11718131B2 (en) * | 2016-12-28 | 2023-08-08 | Compagnie Generale Des Etablissements Michelin | Tread for a heavy goods vehicle tire |
| US20220097457A1 (en) * | 2020-09-30 | 2022-03-31 | The Yokohama Rubber Co., Ltd. | Tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3948961B2 (en) | 2007-07-25 |
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