JP2012076685A - Tire - Google Patents

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JP2012076685A
JP2012076685A JP2010225778A JP2010225778A JP2012076685A JP 2012076685 A JP2012076685 A JP 2012076685A JP 2010225778 A JP2010225778 A JP 2010225778A JP 2010225778 A JP2010225778 A JP 2010225778A JP 2012076685 A JP2012076685 A JP 2012076685A
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tire
groove
inclined groove
width direction
tread
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JP5622511B2 (en
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Hirota Itoi
大太 糸井
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Bridgestone Corp
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Bridgestone Corp
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    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To achieve high running performance and drainage performance on an icy and snowy road surface.SOLUTION: A pneumatic tire 1 has a plurality of inclined grooves 11 inclined with respect to a virtual line (tread-width-direction line L) along the direction of a tread width W. Each of the inclined grooves 11 has: a first inclined groove 101 that extends from the outside W1 in the tire width direction to a tire equator line CL as going from the front side F in the rotation direction to the rear side B, and is terminated at the tread center part TC including the tire equator line CL; and a second inclined groove 102 that is connected to an end region 101S, on the side of the tire equator line CL, of the first inclined groove 101, and extends to the outside W1 in the tire width direction as going from the front side F in the rotation direction to the rear side B. The first inclined grooves 101 and the second inclined grooves 102 are arranged circumferentially in the tire.

Description

本発明は、氷雪路面における使用に適したタイヤに関する。   The present invention relates to a tire suitable for use on an icy and snowy road surface.

従来、氷雪路面（雪上路面や氷上路面）での走行性能を向上させたタイヤについて、様々な提案がなされている。氷雪路面における発進時の加速性能及び停止時の制動性能などの走行性能を高めるためには、トレッド幅方向に沿った横溝（いわゆる、ラグ溝）成分を増加させるとともに接地面における溝面積の割合（ネガティブ比率）を増加させることが好ましい。   Conventionally, various proposals have been made on tires with improved running performance on icy and snowy road surfaces (snowy and icy road surfaces). In order to improve the running performance such as acceleration performance at the start and braking performance at the time of stopping on the snowy and snowy road surface, the lateral groove (so-called lug groove) component along the tread width direction is increased and the ratio of the groove area on the contact surface ( It is preferable to increase the negative ratio.

しかし、ネガティブ比率を増加させるためにラグ溝成分を増やしすぎると、ブロック剛性が低下するため、乾燥路面における操縦安定性が低下する。これに対して、ネガティブ比率を増加させることなくラグ溝成分を増やすと、タイヤ周方向に沿った周方向溝（リブ溝）成分を減少させることになるため、排水性能が低下する。   However, if the lug groove component is increased too much in order to increase the negative ratio, the block rigidity is lowered, and the steering stability on the dry road surface is lowered. On the other hand, if the lug groove component is increased without increasing the negative ratio, the circumferential groove (rib groove) component along the tire circumferential direction is decreased, so that the drainage performance is degraded.

上述した氷雪路面における走行性能と排水性能との両立を図るため、例えば、トレッド幅方向に横断するラグ溝がタイヤ赤道線に対称に略Ｖ字型に形成されたタイヤが提案されている（特許文献１参照）。このタイヤによれば、タイヤ赤道線に対称に略Ｖ字型に形成されたラグ溝と、タイヤ赤道線を含むトレッド中央部にタイヤ周方向に沿って平行に形成された主溝とにより排水性能が改善される。   In order to achieve both the running performance and the drainage performance on the above-mentioned icy and snowy road surface, for example, a tire has been proposed in which lug grooves crossing in the tread width direction are formed in a substantially V shape symmetrical to the tire equator line (patent) Reference 1). According to this tire, drainage performance is achieved by the lug groove formed in a substantially V shape symmetrical to the tire equator line, and the main groove formed in parallel to the tire circumferential direction in the center portion of the tread including the tire equator line. Is improved.

国際公開番号ＷＯ２００５／００５１７０号公報 第１図International Publication No. WO2005 / 005170 Publication 1

しかし、従来のタイヤにも以下のような問題点があった。すなわち、従来のタイヤは、排水性能は改善できるが、前記主溝に囲まれたブロックは、トレッド幅方向よりもタイヤ周方向に長い形状を有している。また、トレッド幅方向に沿ったサイプが形成されている。そのため、トレッド中央部の剛性が低下するという問題である。トレッド中央部の剛性低下は、コーナリング時或いは高速走行時にトラクションの低下を招くことがある。そのため、氷雪路面における様々な状況下において広く走行性能と排水性能の両立を図るには更なる改良が必要である。   However, the conventional tire has the following problems. That is, the conventional tire can improve drainage performance, but the block surrounded by the main groove has a shape longer in the tire circumferential direction than in the tread width direction. Moreover, the sipe along the tread width direction is formed. Therefore, there is a problem that the rigidity of the tread central portion is lowered. A reduction in rigidity at the center of the tread may cause a reduction in traction during cornering or high speed running. Therefore, further improvements are necessary to achieve both wide running performance and drainage performance under various conditions on icy and snowy road surfaces.

そこで、本発明は、氷雪路面における走行性能と排水性能とを高いレベルで両立することができるタイヤの提供を目的とする。   Therefore, an object of the present invention is to provide a tire that can achieve both a running performance and a drainage performance on an icy and snowy road surface at a high level.

上述した課題を解決するため、本発明の第１の特徴は、トレッド部（トレッド部ＴＷ１，ＴＷ２）にトレッド幅方向（Ｗ）に平行なトレッド幅方向線（Ｌ）に対して傾斜し、タイヤ周方向に沿って複数配置された複数の傾斜溝（傾斜溝１１）を備え、車体の前進時の回転方向が指定されたタイヤ（空気入りタイヤ１）であって、前記傾斜溝は、回転方向前方側（Ｆ）から後方側（Ｂ）に行くに連れてタイヤ幅方向外側（Ｗ１，Ｗ２）からタイヤ赤道線（タイヤ赤道線ＣＬ）に向けて延び、前記タイヤ赤道線を含むトレッド中央部（トレッド中央部ＴＣ）で終端する第１傾斜溝（第１傾斜溝１０１，１１１）と、前記第１傾斜溝の前記タイヤ赤道線側の端部領域（端部領域１０１Ｓ，１１１Ｓ）に連結されており、回転方向前方側から後方側に行くに連れてタイヤ幅方向外側に向けて延びる第２傾斜溝（第２傾斜溝１０２，１１２）とを有し、前記第１傾斜溝及び前記第２傾斜溝は、タイヤ周方向に複数配列されており、前記第１傾斜溝は、前記第１傾斜溝が連結された前記第２傾斜溝の回転方向前方側に隣接する第２傾斜溝に交差していることを要旨とする。   In order to solve the above-described problem, a first feature of the present invention is that a tire is inclined with respect to a tread width direction line (L) parallel to the tread width direction (W) in the tread portion (tread portions TW1, TW2). A tire (pneumatic tire 1) that includes a plurality of inclined grooves (inclined grooves 11) arranged along the circumferential direction and in which a rotation direction of the vehicle body is specified is forward (pneumatic tire 1). A tread central portion (including the tire equator line) extending from the tire width direction outer side (W1, W2) toward the tire equator line (tire equator line CL) as it goes from the front side (F) to the rear side (B). The first inclined groove (first inclined groove 101, 111) that terminates in the tread central portion TC) and the end region (end region 101S, 111S) on the tire equator line side of the first inclined groove From the front to the rear in the direction of rotation And a second inclined groove (second inclined grooves 102 and 112) extending outward in the tire width direction, and a plurality of the first inclined grooves and the second inclined grooves are arranged in the tire circumferential direction. The first inclined groove intersects with a second inclined groove adjacent to the front side in the rotational direction of the second inclined groove to which the first inclined groove is coupled.

本発明によれば、第２傾斜溝がタイヤ回転方向の前方側からタイヤ回転方向の後方側に向かうに連れてタイヤ赤道線からタイヤ幅方向外側に向かって延びるため、路面の水をタイヤ幅方向外側へ向けて排水する効果が高められる。   According to the present invention, the second inclined groove extends from the tire equator line toward the outer side in the tire width direction from the front side in the tire rotation direction toward the rear side in the tire rotation direction. The effect of draining to the outside is enhanced.

雪上路面では、タイヤの溝内に詰まった雪が溝壁により圧縮されて、溝内の雪の密度が高められることにより、溝の壁の法線方向に雪柱せん断力が発生する。   On the road surface on snow, snow clogged in the groove of the tire is compressed by the groove wall, and the density of snow in the groove is increased, so that a snow column shear force is generated in the normal direction of the groove wall.

本発明によれば、加速時又は発進時には、トレッド幅方向に平行なトレッド幅方向線に対して傾斜した第１傾斜溝及び第２傾斜溝の溝壁によりエッジ効果が高められる。また、加速時又は発進時に、第１傾斜溝と第２傾斜溝との交差部分において、溝内の雪の動きが干渉し合い、溝内の雪にかかる圧力が上昇する。これにより、溝内の雪の密度が高められ、雪柱せん断力が増大する。従って、氷雪路面における走行性能を高めることができる。   According to the present invention, when accelerating or starting, the edge effect is enhanced by the groove walls of the first and second inclined grooves inclined with respect to the tread width direction line parallel to the tread width direction. Further, when accelerating or starting, the movement of snow in the groove interferes at the intersection of the first inclined groove and the second inclined groove, and the pressure applied to the snow in the groove increases. Thereby, the density of the snow in a groove | channel is raised and a snow column shear force increases. Therefore, the running performance on an icy and snowy road surface can be enhanced.

本発明によれば、氷雪路面における走行性能と排水性能とを高いレベルで両立することができるタイヤを提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the tire which can make compatible the driving | running | working performance and drainage performance in an icy and snowy road surface at a high level can be provided.

図１は、第１実施形態に係る空気入りタイヤ１のトレッドパターンを説明する展開図である。FIG. 1 is a development view illustrating a tread pattern of the pneumatic tire 1 according to the first embodiment.

本発明に係る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。具体的には、（１）空気入りタイヤの説明、（２）作用・効果、（３）その他の実施形態について説明する。   An embodiment of a tire according to the present invention will be described with reference to the drawings. Specifically, (1) description of pneumatic tire, (2) action and effect, (3) other embodiments will be described.

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、同一又は類似の符号を付している。ただし、図面は模式的なのものであり、各寸法の比率などは現実のものとは異なることを留意すべきである。従って、具体的な寸法などは以下の説明を参酌して判断すべきものである。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る。   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 are different from actual ones. 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 is contained.

（１）空気入りタイヤの説明
実施形態に係る空気入りタイヤ１の構成について、図面を参照しながら説明する。図１は、第１実施形態に係る空気入りタイヤ１のトレッドパターンを説明する展開図である。空気入りタイヤ１は、ビード部、カーカス層、ベルト層、トレッド部（以上、不図示）を備える一般的なラジアルタイヤ（スタッドレスタイヤ）である。空気入りタイヤ１は、車体の前進時の回転方向（Ｒ方向）が指定されている。 (1) Description of Pneumatic Tire The configuration of the pneumatic tire 1 according to the embodiment will be described with reference to the drawings. FIG. 1 is a development view illustrating a tread pattern of the pneumatic tire 1 according to the first embodiment. The pneumatic tire 1 is a general radial tire (studless tire) including a bead portion, a carcass layer, a belt layer, and a tread portion (not shown). In the pneumatic tire 1, the rotation direction (R direction) when the vehicle body moves forward is designated.

空気入りタイヤ１は、トレッド幅Ｗ方向に沿った仮想線（トレッド幅方向線Ｌ）に対して傾斜した複数の傾斜溝１１を備える。   The pneumatic tire 1 includes a plurality of inclined grooves 11 that are inclined with respect to a virtual line (tread width direction line L) along the tread width W direction.

傾斜溝１１は、第１傾斜溝１０１と、第２傾斜溝１０２とを有する。第１傾斜溝１０１は、回転方向前方側Ｆから後方側Ｂに行くに連れてタイヤ幅方向外側Ｗ１からタイヤ赤道線ＣＬに向けて延び、タイヤ赤道線ＣＬを含むトレッド中央部ＴＣで終端する。第２傾斜溝１０２は、第１傾斜溝１０１のタイヤ赤道線ＣＬ側の端部領域１０１Ｓに連結されており、回転方向前方側Ｆから後方側Ｂに行くに連れてタイヤ幅方向外側Ｗ１に向けて延びる。第１傾斜溝１０１及び第２傾斜溝１０２は、タイヤ周方向に複数配列される。   The inclined groove 11 includes a first inclined groove 101 and a second inclined groove 102. The first inclined groove 101 extends from the outer side W1 in the tire width direction toward the tire equator line CL as it goes from the front side F to the rear side B in the rotational direction, and terminates at the tread central portion TC including the tire equator line CL. The second inclined groove 102 is connected to the end region 101S on the tire equator line CL side of the first inclined groove 101, and toward the outer side W1 in the tire width direction from the front side F to the rear side B in the rotational direction. Extend. A plurality of the first inclined grooves 101 and the second inclined grooves 102 are arranged in the tire circumferential direction.

第１傾斜溝１０１は、第１傾斜溝１０１が連結された第２傾斜溝１０２の回転方向前方側Ｆに隣接する第２傾斜溝１０２に交差している。第１傾斜溝１０１の溝幅ｍ１は、第２傾斜溝１０２の溝幅ｍ２よりも狭い。   The first inclined groove 101 intersects the second inclined groove 102 adjacent to the rotation direction front side F of the second inclined groove 102 to which the first inclined groove 101 is connected. The groove width m1 of the first inclined groove 101 is narrower than the groove width m2 of the second inclined groove 102.

溝幅ｍ１は、３ｍｍ以上、かつ後述する周方向溝１３０の溝幅よりも狭いことが好ましい。また、第１傾斜溝１０１のトレッド幅方向線Ｌに対する角度θ１は、３０°＜θ１＜６０°とすることができる。第２傾斜溝１０２のトレッド幅方向線Ｌに対する角度θ２は、４５°＜θ２＜８０°とすることができる。   The groove width m1 is preferably 3 mm or more and narrower than the groove width of a circumferential groove 130 described later. The angle θ1 of the first inclined groove 101 with respect to the tread width direction line L can be 30 ° <θ1 <60 °. The angle θ2 of the second inclined groove 102 with respect to the tread width direction line L can be 45 ° <θ2 <80 °.

第２傾斜溝１０２は、第１傾斜溝１０１のタイヤ赤道線ＣＬ側の端部１０１ｅよりもタイヤ幅方向外側に連結されている。すなわち、端部領域１０１Ｓには、第１傾斜溝１０１と第２傾斜溝１０２との連結部分よりもタイヤ赤道線ＣＬ側に突出した突出部１０３が形成されている。   The second inclined groove 102 is connected to the outer side in the tire width direction from the end 101e of the first inclined groove 101 on the tire equator line CL side. That is, in the end region 101 </ b> S, a protruding portion 103 is formed that protrudes toward the tire equator line CL side from the connecting portion between the first inclined groove 101 and the second inclined groove 102.

第１傾斜溝１０１及び第２傾斜溝１０２は、タイヤ赤道線ＣＬに対して一方のタイヤ幅方向外側Ｗ１のトレッド部ＴＷ１と、他方のタイヤ幅方向外側Ｗ２のトレッド部ＴＷ２とにタイヤ周方向に沿って所定間隔に配列されている。   The first inclined groove 101 and the second inclined groove 102 are arranged in the tire circumferential direction on the tread portion TW1 on the outer side W1 in the tire width direction and the tread portion TW2 on the outer side W2 on the other side in the tire width direction with respect to the tire equator line CL. Are arranged at predetermined intervals.

実施形態では、第１傾斜溝１０１及び第２傾斜溝１０２は、タイヤ周方向に等間隔に配列されている。第１傾斜溝１０１は、第１傾斜溝１０１の回転方向後方側Ｂの端部１０１ｂが連結される第２傾斜溝１０２よりも回転方向前方側Ｆに隣接して形成される第２傾斜溝１０４に交差し、第１傾斜溝１０１の回転方向前方側Ｆの端部１０１ｆは、更に回転方向前方側Ｆに形成される第２傾斜溝１０６の回転方向後方側Ｂの端部領域１０６ｂに連結される。   In the embodiment, the first inclined grooves 101 and the second inclined grooves 102 are arranged at equal intervals in the tire circumferential direction. The first inclined groove 101 is formed closer to the front side F in the rotational direction than the second inclined groove 102 to which the end 101b on the rear side B in the rotational direction of the first inclined groove 101 is connected. The end 101f on the front side F in the rotational direction of the first inclined groove 101 is further connected to an end region 106b on the rear side B in the rotational direction of the second inclined groove 106 formed on the front side F in the rotational direction. The

タイヤ幅方向外側には、タイヤ周方向に沿って延びる周方向溝１３０，１５０が形成されている。周方向溝１３０，１５０は、タイヤ周方向に平行なタイヤ周方向線Ｍに対してジグザグ形状に形成されている。   On the outer side in the tire width direction, circumferential grooves 130 and 150 extending along the tire circumferential direction are formed. The circumferential grooves 130 and 150 are formed in a zigzag shape with respect to the tire circumferential line M parallel to the tire circumferential direction.

図１に示す実施形態では、周方向溝１３０，１５０は、タイヤ周方向にわたってトレッド部を展開したとき、任意の一端（図１における回転方向前方側Ｆの端部Ｔｆ）から他端（図１における回転方向後方側Ｂの端部Ｔｂ）が見通せる溝（いわゆる、シースルー溝）になっている。   In the embodiment shown in FIG. 1, the circumferential grooves 130, 150 are arranged from any one end (end portion Tf on the front side F in the rotational direction in FIG. 1) to the other end (FIG. 1) when the tread portion is developed over the tire circumferential direction. The end portion Tb on the rear side B in the rotation direction is a groove that can be seen through (so-called see-through groove).

第２傾斜溝１０２と周方向溝１３０との連通部分において、第２傾斜溝１０２の回転方向前方側Ｆの壁面の端部Ｔ１は、第２傾斜溝１０２の回転方向後方側Ｒの壁面の端部Ｔ２よりもタイヤ赤道線ＣＬ寄りに位置する。   In the communication portion between the second inclined groove 102 and the circumferential groove 130, the end T1 of the wall surface on the front side F in the rotational direction of the second inclined groove 102 is the end of the wall surface on the rear side R in the rotational direction of the second inclined groove 102. It is located closer to the tire equator line CL than the portion T2.

周方向溝１３０，１５０よりもタイヤ幅方向外側Ｗ１，Ｗ２には、トレッド幅方向線に沿って複数の横溝１４０，１６０が形成されている。第２傾斜溝１０２のタイヤ幅方向外側の端部１０２ｂは、横溝１４０に連結する。タイヤ周方向に複数形成された横溝１４０の間には、横溝１４１が形成される。また、タイヤ周方向に複数形成された横溝１６０の間には、横溝１６１が形成される。   A plurality of lateral grooves 140 and 160 are formed along the tread width direction line on the outer side W1 and W2 in the tire width direction from the circumferential grooves 130 and 150. An end 102 b of the second inclined groove 102 on the outer side in the tire width direction is connected to the lateral groove 140. A lateral groove 141 is formed between a plurality of lateral grooves 140 formed in the tire circumferential direction. In addition, lateral grooves 161 are formed between a plurality of lateral grooves 160 formed in the tire circumferential direction.

横溝１４０（横溝１４１）と周方向溝１３０によって形成される陸部Ｂ１には、タイヤ幅方向に沿って、図示しないが細溝（サイプという）が形成されている。ここで、細溝とは、空気入りタイヤ１が接地した際の接地圧力によって細溝を形成する壁部同士が接するような溝をいう。   In the land portion B1 formed by the lateral grooves 140 (lateral grooves 141) and the circumferential grooves 130, narrow grooves (referred to as sipes) are formed along the tire width direction, although not shown. Here, the narrow groove means a groove in which the wall portions forming the narrow groove are in contact with each other by the contact pressure when the pneumatic tire 1 is grounded.

図１に示す実施形態では、他方のタイヤ幅方向外側Ｗ２のトレッド部ＴＷ２には、一方のタイヤ幅方向外側Ｗ１のトレッド部ＴＷ１に形成された第１傾斜溝１０１及び第２傾斜溝１０２とタイヤ赤道線ＣＬに対して対象に、第１傾斜溝１１１及び第２傾斜溝１１２とが形成されている。第１傾斜溝１０１及び第２傾斜溝１０２と、第１傾斜溝１１１及び第２傾斜溝１１２とは、タイヤ周方向にずれている。   In the embodiment shown in FIG. 1, the tread portion TW2 on the other outer side W2 in the tire width direction includes a first inclined groove 101 and a second inclined groove 102 formed on the tread portion TW1 on the outer side W1 in the tire width direction, and the tire. A first inclined groove 111 and a second inclined groove 112 are formed with respect to the equator line CL. The first inclined groove 101 and the second inclined groove 102 and the first inclined groove 111 and the second inclined groove 112 are shifted in the tire circumferential direction.

第１傾斜溝１１１及び第２傾斜溝１１２は、第１傾斜溝１０１及び第２傾斜溝１０２とタイヤ赤道線ＣＬに対して対象な形状を有する。すなわち、第２傾斜溝１１２は、第１傾斜溝１１１のタイヤ赤道線ＣＬ側の端部１１１ｅよりもタイヤ幅方向外側に連結されている。端部領域１１１Ｓには、第１傾斜溝１１１と第２傾斜溝１１２との連結部分よりもタイヤ赤道線ＣＬ側に突出した突出部１１３が形成される。第２傾斜溝１１２のタイヤ幅方向外側の端部１１２ｂは、横溝１６０に連結する。   The first inclined groove 111 and the second inclined groove 112 have a target shape with respect to the first inclined groove 101 and the second inclined groove 102 and the tire equator line CL. That is, the second inclined groove 112 is connected to the outer side in the tire width direction from the end 111e of the first inclined groove 111 on the tire equator line CL side. In the end region 111 </ b> S, a protruding portion 113 is formed that protrudes toward the tire equator line CL side from the connection portion between the first inclined groove 111 and the second inclined groove 112. An end 112 b of the second inclined groove 112 on the outer side in the tire width direction is connected to the lateral groove 160.

（２）作用・効果
空気入りタイヤ１では、本発明によれば、第２傾斜溝１０２がタイヤ回転方向前方側Ｆからタイヤ回転方向後方側Ｂに向かうに連れてタイヤ赤道線ＣＬからタイヤ幅方向外側Ｗ１に向かって延びるため、路面の水をタイヤ幅方向外側へ向けて排水する効果が高められる。 (2) Action / Effect In the pneumatic tire 1, according to the present invention, as the second inclined groove 102 moves from the tire rotation direction front side F toward the tire rotation direction rear side B, the tire equator line CL extends to the tire width direction. Since it extends toward the outer side W1, the effect of draining water on the road surface toward the outer side in the tire width direction is enhanced.

また、トレッド幅方向Ｗに平行なトレッド幅方向線Ｌに対して傾斜した第１傾斜溝１０１及び第２傾斜溝１０２の溝壁により、雪上路面における、加速時又は発進時のエッジ効果が高められる。   Further, the edge effect at the time of acceleration or start on the road surface on snow is enhanced by the groove walls of the first inclined groove 101 and the second inclined groove 102 inclined with respect to the tread width direction line L parallel to the tread width direction W. .

雪上路面では、タイヤの溝内に詰まった雪が溝壁により圧縮されて、溝内の雪の密度が高められることにより、溝の壁の法線方向に雪柱せん断力が発生する。図１に示す実施形態では、第１傾斜溝１０１と第２傾斜溝１０２，１０４，１０６との交差部分において、溝内の雪の動きが干渉し合い、溝内の雪にかかる圧力が上昇する。例えば、加速時には、溝の交差部分において、溝内の雪が黒矢印の方向に動き、互いに干渉し合うことによって溝内の雪の密度が高められ、雪柱せん断力が増大する。また、制動時には、交差部分において、溝内の雪が白抜き矢印の方向に動き、互いに干渉し合うことによって溝内の雪の密度が高められ、雪柱せん断力が増大する。従って、氷雪路面における制動性能及び加速性能を高めることができる。   On the road surface on snow, snow clogged in the groove of the tire is compressed by the groove wall, and the density of snow in the groove is increased, so that a snow column shear force is generated in the normal direction of the groove wall. In the embodiment shown in FIG. 1, the movement of the snow in the groove interferes at the intersection of the first inclined groove 101 and the second inclined groove 102, 104, 106, and the pressure applied to the snow in the groove increases. . For example, during acceleration, snow in the groove moves in the direction of the black arrow at the intersection of the grooves and interferes with each other, thereby increasing the density of snow in the groove and increasing the snow column shear force. Further, at the time of braking, the snow in the groove moves in the direction of the white arrow at the intersection and interferes with each other, thereby increasing the density of snow in the groove and increasing the snow column shear force. Therefore, the braking performance and acceleration performance on the icy and snowy road surface can be enhanced.

特に、第１傾斜溝１０１のトレッド幅方向線Ｌに対する角度θ１を、３０°＜θ１＜６０°、第２傾斜溝１０２のトレッド幅方向線Ｌに対する角度θ２を、４５°＜θ２＜８０°とすると、良好な排水性能を得ることができる。   In particular, the angle θ1 with respect to the tread width direction line L of the first inclined groove 101 is 30 ° <θ1 <60 °, and the angle θ2 with respect to the tread width direction line L of the second inclined groove 102 is 45 ° <θ2 <80 °. Then, good drainage performance can be obtained.

実施形態では、タイヤ赤道線ＣＬに対して線対称の形状を有する第１傾斜溝１０１と第２傾斜溝１０２とが、トレッド部においては、タイヤ周方向の前後にずれて形成されている。これにより、タイヤが転動することによるトレッド幅方向線上におけるネガティブ比率の変動を低減させることができ、エッジに起因するタイヤ騒音を低減することができる。   In the embodiment, the first inclined groove 101 and the second inclined groove 102 having a line-symmetric shape with respect to the tire equator line CL are formed in the tread portion so as to be shifted forward and backward in the tire circumferential direction. Thereby, the fluctuation | variation of the negative ratio on the tread width direction line by a tire rolling can be reduced, and the tire noise resulting from an edge can be reduced.

実施形態では、タイヤ幅方向外側には、タイヤ周方向に平行なタイヤ周方向線Ｍに対してジグザグ形状を有する周方向溝１３０，１５０が形成されている。実施形態では、第２傾斜溝１０２と周方向溝１３０との連通部分において、第２傾斜溝１０２の回転方向前方側Ｆの壁面の端部Ｔ１は、第２傾斜溝１０２の回転方向後方側Ｒの壁面の端部Ｔ２よりもタイヤ赤道線ＣＬ寄りに位置する。   In the embodiment, circumferential grooves 130 and 150 having a zigzag shape with respect to a tire circumferential line M parallel to the tire circumferential direction are formed on the outer side in the tire width direction. In the embodiment, at the communication portion between the second inclined groove 102 and the circumferential groove 130, the end T1 of the wall surface on the front side F in the rotational direction of the second inclined groove 102 is the rear side R in the rotational direction of the second inclined groove 102. Is located closer to the tire equator line CL than the end T2 of the wall surface.

このような形状を有することにより、溝内の雪が壁面に引っかかりやすくなり、転動により溝内の雪を効率よく圧縮することができる。従って、雪柱せん断力を効率的に発生させることができる。また、周方向溝１３０，１５０は、いわゆる、シースルー溝になっているため、エッジ効果を有すると共に、雪上性能とともに排水性能を高めることができる。   By having such a shape, the snow in the groove is easily caught on the wall surface, and the snow in the groove can be efficiently compressed by rolling. Therefore, snow column shear force can be generated efficiently. Moreover, since the circumferential grooves 130 and 150 are so-called see-through grooves, they have an edge effect and can improve drainage performance as well as on-snow performance.

また、実施形態の空気入りタイヤ１によれば、第１傾斜溝１０１と第２傾斜溝１０２とが図１のように形成されているため、トレッド中央部ＴＣには、タイヤ周方向に連続した陸部が形成される。このため、高速走行時における操縦安定性が向上する。   Further, according to the pneumatic tire 1 of the embodiment, since the first inclined groove 101 and the second inclined groove 102 are formed as shown in FIG. 1, the tread central portion TC is continuous in the tire circumferential direction. A land part is formed. For this reason, the steering stability at the time of high-speed driving is improved.

（３）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、実施例が明らかとなる。例えば、本発明の実施形態は、次のように変更することができる。 (3) 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 description and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments and examples will be apparent to those skilled in the art. For example, the embodiment of the present invention can be modified as follows.

例えば、図１では、第１傾斜溝１０１及び第２傾斜溝１０２は、タイヤ赤道線ＣＬに対して一方のタイヤ幅方向外側Ｗ１のトレッド部ＴＷ１と、他方のタイヤ幅方向外側Ｗ２のトレッド部ＴＷ２とにタイヤ周方向に沿って等間隔に配列されていると説明した。しかし、第１傾斜溝１０１及び第２傾斜溝１０２は、タイヤ周方向に等間隔でなくてもよい。   For example, in FIG. 1, the first inclined groove 101 and the second inclined groove 102 include a tread portion TW1 on one tire width direction outer side W1 and a tread portion TW2 on the other outer side in the tire width direction W2 with respect to the tire equator line CL. It was explained that they were arranged at equal intervals along the tire circumferential direction. However, the first inclined groove 101 and the second inclined groove 102 may not be equally spaced in the tire circumferential direction.

図１に示す実施形態では、タイヤ周方向に沿って延びる周方向溝は、一方のタイヤ幅方向外側Ｗ１，他方のタイヤ幅方向外側Ｗ２の両方に形成されているが、周方向溝は、何れか一方側にのみ形成されていてもよい。   In the embodiment shown in FIG. 1, the circumferential grooves extending along the tire circumferential direction are formed on both one tire width direction outer side W1 and the other tire width direction outer side W2. It may be formed only on one side.

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ものである。   As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

１…空気入りタイヤ、 １１…傾斜溝、 １０１…第１傾斜溝、 １０１Ｓ，１１１Ｓ…端部領域 １０１ｂ…端部、 １０１ｅ…端部、 １０１ｆ…端部、 １０２…第２傾斜溝、 １０２ｂ…端部、 １０３…突出部、 １０４…第２傾斜溝、 １０６…第２傾斜溝、 １０６ｂ…端部領域、 １１１…第１傾斜溝、 １１１Ｓ…端部領域、 １１１ｅ…端部、 １１２…第２傾斜溝、 １１２ｂ…端部、 １１３…突出部、 １３０，１５０…周方向溝、 １４０，１６０…横溝   DESCRIPTION OF SYMBOLS 1 ... Pneumatic tire, 11 ... Inclined groove, 101 ... 1st inclined groove, 101S, 111S ... End part area 101b ... End part, 101e ... End part, 101f ... End part, 102 ... Second inclined groove, 102b ... End 103: Projection, 104 ... Second inclined groove, 106 ... Second inclined groove, 106b ... End region, 111 ... First inclined groove, 111S ... End region, 111e ... End, 112 ... Second inclined Groove, 112b ... end, 113 ... protrusion, 130, 150 ... circumferential groove, 140, 160 ... transverse groove

Claims (8)

トレッド部にトレッド幅方向に平行なトレッド幅方向線に対して傾斜し、タイヤ周方向に沿って複数配置された複数の傾斜溝を備え、車体の前進時の回転方向が指定されたタイヤであって、
前記傾斜溝は、
回転方向前方側から後方側に行くに連れてタイヤ幅方向外側からタイヤ赤道線に向けて延び、前記タイヤ赤道線を含むトレッド中央部で終端する第１傾斜溝と、
前記第１傾斜溝の前記タイヤ赤道線側の端部領域に連結されており、回転方向前方側から後方側に行くに連れてタイヤ幅方向外側に向けて延びる第２傾斜溝とを有し、
前記第１傾斜溝及び前記第２傾斜溝は、タイヤ周方向に複数配列されており、
前記第１傾斜溝は、前記第１傾斜溝が連結された前記第２傾斜溝の回転方向前方側に隣接する第２傾斜溝に交差しているタイヤ。 The tire is provided with a plurality of inclined grooves that are inclined with respect to the tread width direction line parallel to the tread width direction in the tread portion and are arranged along the tire circumferential direction, and in which the rotation direction when the vehicle body moves forward is specified. And
The inclined groove is
A first inclined groove that extends from the outer side in the tire width direction toward the tire equator line as it goes from the front side to the rear side in the rotational direction, and terminates at the center of the tread that includes the tire equator line;
A second inclined groove that is connected to an end region on the tire equator line side of the first inclined groove, and extends toward the outer side in the tire width direction from the front side in the rotational direction to the rear side;
A plurality of the first inclined grooves and the second inclined grooves are arranged in the tire circumferential direction,
The tire in which the first inclined groove intersects with a second inclined groove adjacent to the front side in the rotational direction of the second inclined groove to which the first inclined groove is coupled. 前記第１傾斜溝の溝幅は、前記第２傾斜溝の溝幅よりも狭い請求項１に記載のタイヤ。   The tire according to claim 1, wherein a groove width of the first inclined groove is narrower than a groove width of the second inclined groove. 前記第２傾斜溝は、前記第１傾斜溝の前記タイヤ赤道線側の端部よりもタイヤ幅方向外側に連結されている請求項１に記載のタイヤ。   2. The tire according to claim 1, wherein the second inclined groove is connected to an outer side in the tire width direction from an end portion of the first inclined groove on the tire equator line side. 少なくとも一方のタイヤ幅方向外側には、タイヤ周方向に沿って延びる周方向溝を有し、
前記周方向溝は、タイヤ周方向に平行なタイヤ周方向線に対してジグザグ形状に形成されており、タイヤ周方向にわたって前記トレッド部を展開したとき、任意の一端から他端が見通せる溝であり、
前記第２傾斜溝は、前記周方向溝に連通する請求項１に記載のタイヤ。 At least one tire width direction outer side has a circumferential groove extending along the tire circumferential direction,
The circumferential groove is a groove that is formed in a zigzag shape with respect to a tire circumferential line parallel to the tire circumferential direction, and the other end can be seen from any one end when the tread portion is developed over the tire circumferential direction. ,
The tire according to claim 1, wherein the second inclined groove communicates with the circumferential groove. 前記第２傾斜溝と前記周方向溝との連通部分において、
前記第２傾斜溝の回転方向前方側の壁面の端部は、前記第２傾斜溝の回転方向後方側の壁面の端部よりもタイヤ赤道線寄りに位置する請求項４に記載のタイヤ。 In the communication portion between the second inclined groove and the circumferential groove,
The tire according to claim 4, wherein an end portion of the wall surface on the front side in the rotation direction of the second inclined groove is positioned closer to the tire equator line than an end portion of the wall surface on the rear side in the rotation direction of the second inclined groove. 前記周方向溝よりもタイヤ幅方向外側には、トレッド幅方向に沿って横溝が形成されており、前記第２傾斜溝のタイヤ幅方向外側の端部は、前記横溝に連結されている請求項４に記載のタイヤ。   A lateral groove is formed along the tread width direction on the outer side in the tire width direction than the circumferential groove, and an end portion on the outer side in the tire width direction of the second inclined groove is connected to the lateral groove. 4. The tire according to 4. 前記横溝と前記周方向溝によって形成される陸部には、前記タイヤ幅方向に沿って前記トレッド部が路面に当接した際に溝壁が接する細溝が形成されている請求項４に記載のタイヤ。   5. The land portion formed by the lateral groove and the circumferential groove is formed with a narrow groove that contacts a groove wall when the tread portion abuts against a road surface along the tire width direction. Tires. 前記第１傾斜溝及び前記第２傾斜溝は、前記タイヤ赤道線に対して一方のタイヤ幅方向外側のトレッド部と、他方のタイヤ幅方向外側のトレッド部とにタイヤ周方向に沿って所定間隔に配列されており、
前記一方のタイヤ幅方向外側のトレッド部に形成された第１傾斜溝及び第２傾斜溝と、前記他方のタイヤ幅方向外側のトレッド部に形成された第１傾斜溝及び第２傾斜溝とは、タイヤ周方向にずれている請求項１に記載のタイヤ。 The first inclined groove and the second inclined groove are spaced apart from each other in the tire circumferential direction between one tread portion on the outer side in the tire width direction and the other tread portion on the outer side in the tire width direction with respect to the tire equator line. Are arranged in
The first inclined groove and the second inclined groove formed in the tread portion outside the one tire width direction, and the first inclined groove and the second inclined groove formed in the other tread portion outside the tire width direction. The tire according to claim 1, which is displaced in the tire circumferential direction.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016074328A (en) * 2014-10-07 2016-05-12 株式会社ブリヂストン Pneumatic tire
CN108859613A (en) * 2017-05-16 2018-11-23 住友橡胶工业株式会社 Tire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101756397B1 (en) * 2015-11-04 2017-07-11 넥센타이어 주식회사 pneumatic tire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07223409A (en) * 1994-02-07 1995-08-22 Bridgestone Corp Pneumatic tire for heavy load
JP2000038012A (en) * 1998-07-01 2000-02-08 Continental Ag Automobile tire
JP2002264612A (en) * 2001-03-08 2002-09-18 Bridgestone Corp Pneumatic tire
JP2006176055A (en) * 2004-12-24 2006-07-06 Yokohama Rubber Co Ltd:The Pneumatic tire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07223409A (en) * 1994-02-07 1995-08-22 Bridgestone Corp Pneumatic tire for heavy load
JP2000038012A (en) * 1998-07-01 2000-02-08 Continental Ag Automobile tire
JP2002264612A (en) * 2001-03-08 2002-09-18 Bridgestone Corp Pneumatic tire
JP2006176055A (en) * 2004-12-24 2006-07-06 Yokohama Rubber Co Ltd:The Pneumatic tire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016074328A (en) * 2014-10-07 2016-05-12 株式会社ブリヂストン Pneumatic tire
CN108859613A (en) * 2017-05-16 2018-11-23 住友橡胶工业株式会社 Tire
CN108859613B (en) * 2017-05-16 2021-09-24 住友橡胶工业株式会社 Tyre for vehicle wheels

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