JP2013023194A - Tire - Google Patents

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JP2013023194A
JP2013023194A JP2011163359A JP2011163359A JP2013023194A JP 2013023194 A JP2013023194 A JP 2013023194A JP 2011163359 A JP2011163359 A JP 2011163359A JP 2011163359 A JP2011163359 A JP 2011163359A JP 2013023194 A JP2013023194 A JP 2013023194A
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groove
tire
width direction
tread width
circumferential
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JP5797965B2 (en
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Ataka Takei
吾空 武居
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Bridgestone Corp
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Bridgestone Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a tire capable of establishing high-dimensional compatibility between performance on a wet road and performance on a snowy and icy road.SOLUTION: In the pneumatic tire 10, an inclined groove 100 is curved to get closer to a tread width direction Dtoward the outside of the tread width direction D, and crosses an inclined groove 100 which is formed on the reverse side in reference to a tire equator line CL. Additionally, a branched circumferential groove 200, which branches off from an intermediate portion of the inclined groove 100 and which is elongated along a circumferential direction Dof the tire, is formed. The branched circumferential groove 200 crosses an inclined groove 100 adjacent to the inclined groove 100 serving as a branch source.

Description

本発明は、タイヤ周方向に延びる周方向溝が形成されるとともに、タイヤ周方向に対して傾斜する傾斜溝が複数形成されたタイヤに関する。   The present invention relates to a tire in which circumferential grooves extending in the tire circumferential direction are formed and a plurality of inclined grooves that are inclined with respect to the tire circumferential direction are formed.

従来、乗用自動車などに装着される空気入りタイヤ（以下、タイヤ）では、湿潤路及び氷雪路での性能を両立するため、様々なトレッドパターンが用いられている。例えば、トレッド幅方向外側にタイヤ周方向に延びる周方向溝が形成されるとともに、トレッド幅方向の中央部にタイヤ周方向に対して傾斜する傾斜溝が複数形成されたタイヤが知られている（特許文献１参照）。   2. Description of the Related Art Conventionally, various tread patterns are used in pneumatic tires (hereinafter referred to as tires) mounted on passenger cars and the like in order to achieve both performance on wet roads and icy and snowy roads. For example, a tire is known in which a circumferential groove extending in the tire circumferential direction is formed on the outer side in the tread width direction, and a plurality of inclined grooves that are inclined with respect to the tire circumferential direction are formed in the center portion in the tread width direction ( Patent Document 1).

また、当該傾斜溝は、周方向溝に連通している。このような周方向溝と傾斜溝との組み合わせによって、排水性を確保しつつ、雪上でのトラクションや制動力を向上させている。   Further, the inclined groove communicates with the circumferential groove. The combination of such circumferential grooves and inclined grooves improves the traction and braking force on snow while ensuring drainage.

特開２００７−１６１０５７号公報（第１図）Japanese Patent Laid-Open No. 2007-161057 (FIG. 1)

しかしながら、近年の乗用自動車の性能向上に伴って、湿潤路及び氷雪路での性能をより高い次元で両立したタイヤが求められていた。   However, with the recent improvement in performance of passenger cars, there has been a demand for tires that achieve higher performance on wet roads and icy and snowy roads.

そこで、本発明は、このような状況に鑑みてなされたものであり、湿潤路及び氷雪路での性能をより高い次元で両立し得るタイヤの提供を目的とする。   Therefore, the present invention has been made in view of such a situation, and an object thereof is to provide a tire capable of achieving both higher performance on wet roads and icy and snowy roads.

本発明の特徴は、トレッド幅方向（トレッド幅方向DT）外側の領域においてタイヤ周方向（タイヤ周方向DC）に延びる周方向溝（周方向溝20, 30）が形成されるとともに、トレッド幅方向の中央部からトレッド幅方向外側に延び、タイヤ周方向に対して傾斜する傾斜溝（傾斜溝100）が複数形成され、前記傾斜溝のトレッド幅方向外側端が前記周方向溝に連通したタイヤ（空気入りタイヤ10）であって、前記傾斜溝は、トレッド幅方向外側に向かうに連れてトレッド幅方向に近づくように湾曲するとともに、タイヤ赤道線（タイヤ赤道線CL）を基準として逆側に形成されている前記傾斜溝と交差し、前記傾斜溝の中間部から分岐し、タイヤ周方向に沿って延びる分岐周方向溝（分岐周方向溝200）が形成され、前記分岐周方向溝（例えば、分岐周方向溝230）は、分岐元の傾斜溝（例えば、傾斜溝110）に隣接する傾斜溝（傾斜溝130）と交差することを要旨とする。 The present invention is characterized in that circumferential grooves (circumferential grooves 20, 30) extending in the tire circumferential direction (tire circumferential direction D C ) are formed in a region outside the tread width direction (tread width direction D T ) and the tread. A plurality of inclined grooves (inclined grooves 100) extending from the center in the width direction to the outer side in the tread width direction and inclined with respect to the tire circumferential direction are formed, and the outer ends in the tread width direction of the inclined grooves communicate with the circumferential groove. The tire (pneumatic tire 10), wherein the inclined groove is curved so as to approach the tread width direction toward the outer side in the tread width direction, and on the opposite side with respect to the tire equator line (tire equator line CL) A branched circumferential groove (branched circumferential groove 200) is formed that intersects with the inclined groove formed on the outer periphery of the inclined groove and branches from an intermediate portion of the inclined groove and extends along the tire circumferential direction. For example, branch circumference Groove 230), branch origin inclined grooves (e.g., the gist of intersection with the inclined grooves adjacent to the inclined groove 110) (inclined groove 130).

本発明の特徴によれば、湿潤路及び氷雪路での性能をより高い次元で両立し得るタイヤを提供することができる。   According to the characteristics of the present invention, it is possible to provide a tire capable of achieving both higher performance on wet roads and icy and snowy roads.

本発明の実施形態に係る空気入りタイヤ10のトレッドの一部平面展開図である。1 is a partial plan view of a tread of a pneumatic tire 10 according to an embodiment of the present invention. 本発明の実施形態に係る空気入りタイヤ10のトレッドの一部拡大平面図である。1 is a partially enlarged plan view of a tread of a pneumatic tire 10 according to an embodiment of the present invention.

次に、本発明に係るタイヤ（空気入りタイヤ）の実施形態について、図面を参照しながら説明する。なお、以下の図面の記載において、同一または類似の部分には、同一または類似の符号を付している。ただし、図面は模式的なものであり、各寸法の比率などは現実のものとは異なることに留意すべきである。   Next, an embodiment of a tire (pneumatic tire) according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

したがって、具体的な寸法などは以下の説明を参酌して判断すべきである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれ得る。   Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings may be contained.

（１）空気入りタイヤの概略構成
図１は、本実施形態に係る空気入りタイヤ10のトレッドの一部平面展開図である。図１に示すように、空気入りタイヤ10には、周方向溝20及び周方向溝30が形成される。 (1) Schematic Configuration of Pneumatic Tire FIG. 1 is a partial plan development view of a tread of the pneumatic tire 10 according to the present embodiment. As shown in FIG. 1, a circumferential groove 20 and a circumferential groove 30 are formed in the pneumatic tire 10.

空気入りタイヤ10は、降雪時の使用に耐え得るいわゆる冬用タイヤであり、自動車への装着時における回転方向が指定されるトレッドパターンを有する。ここで言う冬用タイヤとは、氷雪路での性能を重視したスタッドレスタイヤと、氷雪路及び非氷雪路での性能をバランスよく確保したオールシーズン用タイヤなどを含むタイヤのことを言う。なお、空気入りタイヤ10には、空気に代えて窒素ガスなどの不活性ガスを充填してもよい。また、図１において、細線部分は、正規内圧及び正規荷重時には、路面に接地しない領域を意味している。   The pneumatic tire 10 is a so-called winter tire that can withstand use during snowfall, and has a tread pattern in which the direction of rotation when mounted on an automobile is specified. The winter tire here refers to a tire including a studless tire that places importance on performance on icy and snowy roads, and an all-season tire that ensures a balanced performance on icy and non-snowy roads. The pneumatic tire 10 may be filled with an inert gas such as nitrogen gas instead of air. Moreover, in FIG. 1, the thin line part means the area | region which does not touch a road surface at the time of a regular internal pressure and a regular load.

周方向溝20, 30は、トレッド幅方向DT外側の領域において、タイヤ周方向DCに延びる。周方向溝20と周方向溝30との間には、路面と接地する陸部40が設けられる。 Circumferential groove 20, 30, in the tread width direction D T outside the region, extending in the tire circumferential direction D C. Between the circumferential groove 20 and the circumferential groove 30, a land portion 40 that is in contact with the road surface is provided.

陸部40は、トレッド幅方向DTにおける中央部に設けられる。なお、トレッド幅方向DTの中央部とは、日本自動車タイヤ協会（JATMA）などで規定される正規内圧に設定された空気入りタイヤ10に正規荷重が付加された状態において、タイヤ赤道線CLを含むトレッド幅の６０％の領域内を意味する。 The land portion 40 is provided in the central portion in the tread width direction DT . The central part in the tread width direction DT is the tire equator line CL when a normal load is applied to the pneumatic tire 10 set to the normal internal pressure specified by the Japan Automobile Tire Association (JATMA). It means in the region of 60% of the tread width.

陸部40には、複数の傾斜溝100が形成される。傾斜溝100は、トレッド幅方向DTの中央部からトレッド幅方向DT外側に延び、タイヤ周方向DCに対して傾斜する。傾斜溝100のトレッド幅方向DT外側端は、周方向溝20（または周方向溝30）に連通する。 A plurality of inclined grooves 100 are formed in the land portion 40. Inclined groove 100 extends from the central portion of the tread width direction D T in the tread width direction D T outwardly inclined with respect to the tire circumferential direction D C. The outer end of the inclined groove 100 in the tread width direction DT communicates with the circumferential groove 20 (or the circumferential groove 30).

また、陸部40には、複数の分岐周方向溝200が形成される。分岐周方向溝200は、傾斜溝100の中間部から分岐し、タイヤ周方向DCに沿って延びる。なお、空気入りタイヤ10には、図示しないサイプが形成されていてもよい。 Further, the land portion 40 is formed with a plurality of branch circumferential grooves 200. Branch circumferential groove 200 is branched from an intermediate portion of the inclined groove 100, extending along the tire circumferential direction D C. Note that the pneumatic tire 10 may be formed with a sipe (not shown).

（２）陸部の形状
図２は、空気入りタイヤ10のトレッドの一部拡大平面図である。図２では、傾斜溝100について、傾斜溝110〜傾斜溝140を例として説明する。また、分岐周方向溝200について、分岐周方向溝210〜分岐周方向溝240を例として説明する。 (2) Shape of Land Part FIG. 2 is a partially enlarged plan view of the tread of the pneumatic tire 10. In FIG. 2, the inclined groove 100 will be described taking the inclined groove 110 to the inclined groove 140 as an example. Further, the branch circumferential groove 200 will be described taking the branch circumferential groove 210 to the branch circumferential groove 240 as examples.

例えば、傾斜溝110は、トレッド幅方向DT外側に向かうに連れてトレッド幅方向DTに近づくように湾曲する。また、傾斜溝110は、タイヤ赤道線CLを基準として逆側に形成されている傾斜溝120及び傾斜溝140と交差する。傾斜溝110の溝幅は、トレッド幅方向DT外側に向かうに連れて広くなる。 For example, the inclined groove 110 is curved so as to approach the tread width direction D T As the outward tread width direction D T. The inclined groove 110 intersects the inclined groove 120 and the inclined groove 140 formed on the opposite side with respect to the tire equator line CL. The groove width of the inclined groove 110 becomes wider toward the outer side in the tread width direction DT .

また、例えば、分岐周方向溝230は、分岐元の傾斜溝110にタイヤ周方向において隣接する傾斜溝130と交差する。分岐周方向溝230は、分岐元の傾斜溝110と逆方向に湾曲する。具体的には、傾斜溝110は、トレッド幅方向DT外側に向かうに連れてトレッド幅方向DTに近づくように湾曲しているのに対して、分岐周方向溝230は、トレッド幅方向DT外側に向かうに連れてトレッド幅方向DTから遠ざかる、つまり、タイヤ周方向DCに近づくように湾曲している。 Further, for example, the branch circumferential groove 230 intersects the inclined groove 130 adjacent to the branch source inclined groove 110 in the tire circumferential direction. The branch circumferential groove 230 is curved in the direction opposite to the branching inclined groove 110. Specifically, the inclined groove 110, whereas the curved so as to approach the tread width direction D T As the outward tread width direction D T, branched circumferential groove 230, the tread width direction D away from the tread width direction D T as the T toward the outside, i.e., is curved so as to approach the tire circumferential direction D C.

なお、タイヤ赤道線CLを基準として逆側の領域に形成される傾斜溝120, 140及び分岐周方向溝220, 240も傾斜溝110, 130及び分岐周方向溝210, 230と略対称の形状を有する。   The inclined grooves 120, 140 and the branched circumferential grooves 220, 240 formed in the opposite region with respect to the tire equator line CL are also substantially symmetrical with the inclined grooves 110, 130 and the branched circumferential grooves 210, 230. Have.

周方向溝20は、トレッド幅方向DT外側からトレッド幅方向DT内側に屈曲する屈曲部25を有する。傾斜溝120, 140のトレッド幅方向外側の端部は、屈曲部25に連通する。同様に、周方向溝30は、トレッド幅方向DT外側からトレッド幅方向DT内側に屈曲する屈曲部35を有する。傾斜溝110, 130のトレッド幅方向外側の端部は、屈曲部35に連通する。 Circumferential groove 20 has a bent portion 25 bent from the tread width direction D T outside the tread width direction D T inside. The ends of the inclined grooves 120 and 140 on the outer side in the tread width direction communicate with the bent portion 25. Similarly, the circumferential groove 30 has a bent portion 35 bent from the tread width direction D T outside the tread width direction D T inside. The ends of the inclined grooves 110 and 130 on the outer side in the tread width direction communicate with the bent portion 35.

（３）作用・効果
空気入りタイヤ10によれば、例えば、傾斜溝110は、トレッド幅方向DT外側に向かうに連れてトレッド幅方向DTに近づくように湾曲するとともに、傾斜溝120, 140と交差する。さらに、分岐周方向溝230は、傾斜溝110の中間部から分岐し、傾斜溝130と交差する。 (3) Advantageous Effects According to the pneumatic tire 10, for example, inclined grooves 110, with curved so as to approach the tread width direction D T As the outward tread width direction D T, the inclined grooves 120, 140 Intersect. Further, the branch circumferential groove 230 branches from the middle portion of the inclined groove 110 and intersects the inclined groove 130.

このため、陸部40に形成されているこれらの溝部に入り込んだ雪は、逃げ場を規制されるため、結果的に雪柱せん断力が増大する。したがって、氷雪路におけるトラクションや制動力が向上する。具体的には、空気入りタイヤ10は、回転方向が指定されるため、制動時には、溝部に入り込んだ雪が傾斜溝110の先端でせき止められるようになるため、制動力が向上する。また、発進加速時には、傾斜溝110と分岐周方向溝200との交差部分で互いぶつかるようになるため、トラクションが向上する。また、傾斜溝100は、周方向溝20, 30に連通するため、陸部40に入り込んだ雨水を効率的に排水できる。   For this reason, since the snow which entered into these groove parts formed in the land part 40 is controlled for escape, the snow column shear force increases as a result. Therefore, the traction and braking force on an icy and snowy road are improved. Specifically, since the rotation direction of the pneumatic tire 10 is designated, the snow that has entered the groove portion is dammed up at the tip of the inclined groove 110 during braking, so that the braking force is improved. In addition, at the time of starting acceleration, traction is improved because the inclined grooves 110 and the branched circumferential grooves 200 collide with each other. In addition, since the inclined groove 100 communicates with the circumferential grooves 20 and 30, rainwater that has entered the land portion 40 can be efficiently drained.

すなわち、空気入りタイヤ10によれば、湿潤路及び氷雪路での性能を高い次元で両立し得る。   That is, according to the pneumatic tire 10, the performance on wet roads and icy and snowy roads can be achieved at high levels.

本実施形態では、分岐周方向溝200は、分岐元の傾斜溝100と逆方向に湾曲する。このため、陸部40に形成されているこれらの溝部に入り込んだ雪は、さらに逃げ場を規制されるため、氷雪路におけるトラクションや制動力の更なる向上に寄与し得る。   In the present embodiment, the branch circumferential groove 200 is curved in the opposite direction to the branch source inclined groove 100. For this reason, the snow that has entered these groove portions formed in the land portion 40 is further restricted in escape area, and thus can contribute to further improvement of traction and braking force on the icy and snowy road.

本実施形態では、傾斜溝100の溝幅は、トレッド幅方向DT外側に向かうに連れて広くなる。つまり、トレッド幅方向DT外側から傾斜溝100に入り込んだ雪は、溝幅が徐々に狭くなるとともに他の傾斜溝100と交差するため、さらに逃げ場を規制される。したがって、氷雪路におけるトラクションや制動力の更なる向上に寄与し得る。 In the present embodiment, the groove width of the inclined groove 100 becomes wider toward the outside of the tread width direction DT . That is, the snow that has entered the inclined groove 100 from the outside of the tread width direction DT gradually narrows and intersects with the other inclined grooves 100, and is further restricted from escape. Therefore, it can contribute to further improvement of traction and braking force on an icy and snowy road.

本実施形態では、傾斜溝100のトレッド幅方向DT外側の端部は、屈曲部25, 35に連通する。このような屈曲部25, 35によっても雪柱せん断力が増大し、氷雪路におけるトラクションや制動力の更なる向上に寄与し得る。 In the present embodiment, the outer end of the inclined groove 100 in the tread width direction DT communicates with the bent portions 25 and 35. Such bent portions 25 and 35 also increase the snow column shear force, which can contribute to further improvement of traction and braking force on icy and snowy roads.

（４）その他の実施形態
上述したように、本発明の実施形態を通じて本発明の内容を開示したが、この開示の一部をなす論述及び図面は、本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなる。 (4) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

例えば、上述した実施形態では、傾斜溝100のトレッド幅方向DT外側の端部は、屈曲部25, 35に連通していたが、屈曲部25, 35は、必ずしも形成されていなくても構わない。 For example, in the above-described embodiment, the end of the inclined groove 100 outside the tread width direction DT communicates with the bent portions 25 and 35, but the bent portions 25 and 35 may not necessarily be formed. Absent.

上述した実施形態では、傾斜溝100の溝幅は、トレッド幅方向DT外側に向かうに連れて広くなっていたが、傾斜溝100の溝幅は、変化することなく一定でも構わない。 In the embodiment described above, the groove width of the inclined groove 100 is increased toward the outer side in the tread width direction DT , but the groove width of the inclined groove 100 may be constant without changing.

上述した実施形態では、分岐周方向溝200は、分岐元の傾斜溝100と逆方向に湾曲していたが、分岐周方向溝200は、例えば、直線状であってもよい。   In the embodiment described above, the branch circumferential groove 200 is curved in the opposite direction to the branching inclined groove 100, but the branch circumferential groove 200 may be linear, for example.

上述した実施形態では、トレッド幅方向DTの中央部とは、JATMAなどで規定される正規内圧に設定された空気入りタイヤ10に正規荷重が付加された状態において、タイヤ赤道線CLを含むトレッド幅の６０％の領域内を意味するものとしたが、キャンバー角が大きい自動車への装着を前提した空気入りタイヤの場合などには、正規内圧に設定された空気入りタイヤに正規荷重が付加された状態におけるトレッド幅方向の中心を基準としたトレッドの「接地幅」の６０％の領域内を意味するものとしてもよい。 In the embodiment described above, the central portion of the tread width direction DT is the tread including the tire equator line CL in a state where a normal load is applied to the pneumatic tire 10 set to a normal internal pressure defined by JATMA or the like. In the case of a pneumatic tire that is assumed to be mounted on a car with a large camber angle, a normal load is applied to the pneumatic tire set to the normal internal pressure. It may also mean a region of 60% of the “contact width” of the tread with respect to the center in the tread width direction.

このように、本発明は、ここでは記載していない様々な実施の形態などを含むことは勿論である。したがって、本発明の技術的範囲は、上述の説明から妥当な特許請求の範囲に係る発明特定事項によってのみ定められる。   As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the scope of claims reasonable from the above description.

10…空気入りタイヤ
20…周方向溝
25, 35…屈曲部
30…周方向溝
40…陸部
100, 110, 120, 130, 140…傾斜溝
200, 210, 220, 230, 240…分岐周方向溝 10 ... Pneumatic tire
20 ... Circumferential groove
25, 35… Bend
30 ... Circumferential groove
40 ... Land
100, 110, 120, 130, 140 ... inclined grooves
200, 210, 220, 230, 240 ... Branch circumferential groove

Claims (4)

トレッド幅方向外側の領域においてタイヤ周方向に延びる周方向溝が形成されるとともに、トレッド幅方向の中央部からトレッド幅方向外側に延び、タイヤ周方向に対して傾斜する傾斜溝が複数形成され、
前記傾斜溝のトレッド幅方向外側端が前記周方向溝に連通したタイヤであって、
前記傾斜溝は、トレッド幅方向外側に向かうに連れてトレッド幅方向に近づくように湾曲するとともに、タイヤ赤道線を基準として逆側に形成されている前記傾斜溝と交差し、
前記傾斜溝の中間部から分岐し、タイヤ周方向に沿って延びる分岐周方向溝が形成され、
前記分岐周方向溝は、分岐元の傾斜溝に隣接する傾斜溝と交差するタイヤ。 A circumferential groove extending in the tire circumferential direction is formed in the outer region in the tread width direction, and a plurality of inclined grooves extending outward from the center portion in the tread width direction and inclined with respect to the tire circumferential direction are formed.
The tread width direction outer end of the inclined groove is a tire communicated with the circumferential groove,
The inclined groove is curved so as to approach the tread width direction as it goes outward in the tread width direction, and intersects with the inclined groove formed on the opposite side with respect to the tire equator line,
A branch circumferential groove that branches off from the middle portion of the inclined groove and extends along the tire circumferential direction is formed,
The branch circumferential groove is a tire that intersects with an inclined groove adjacent to the branched inclined groove. 前記分岐周方向溝は、分岐元の前記傾斜溝と逆方向に湾曲する請求項１に記載のタイヤ。   The tire according to claim 1, wherein the branch circumferential groove is curved in a direction opposite to the inclined groove at the branch source. 前記傾斜溝の溝幅は、トレッド幅方向外側に向かうに連れて広くなる請求項１または２に記載のタイヤ。   The tire according to claim 1 or 2, wherein a groove width of the inclined groove becomes wider toward the outer side in the tread width direction. 前記周方向溝は、トレッド幅方向外側からトレッド幅方向内側に屈曲する屈曲部を有し、前記傾斜溝のトレッド幅方向外側の端部は、前記屈曲部に連通する請求項１乃至３の何れか一項に記載に記載のタイヤ。   The circumferential groove has a bent portion bent from the outer side in the tread width direction to the inner side in the tread width direction, and an end portion of the inclined groove on the outer side in the tread width direction communicates with the bent portion. The tire according to claim 1.
JP2011163359A 2011-07-26 2011-07-26 tire Expired - Fee Related JP5797965B2 (en)

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JP2020183128A (en) * 2019-04-26 2020-11-12 横浜ゴム株式会社 Pneumatic tire

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020183128A (en) * 2019-04-26 2020-11-12 横浜ゴム株式会社 Pneumatic tire
JP7120146B2 (en) 2019-04-26 2022-08-17 横浜ゴム株式会社 pneumatic tire

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