JP2010280265A - Tire - Google Patents

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JP2010280265A
JP2010280265A JP2009133950A JP2009133950A JP2010280265A JP 2010280265 A JP2010280265 A JP 2010280265A JP 2009133950 A JP2009133950 A JP 2009133950A JP 2009133950 A JP2009133950 A JP 2009133950A JP 2010280265 A JP2010280265 A JP 2010280265A
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groove
rib
tire
resonator
partition wall
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JP5271813B2 (en
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Takaaki Kojima
崇明 小島
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire attaining the suppression of biting of a small stone or the like, reduction of an air column resonance sound and insurance of rigidity of a rib-like land at a high level when a Helmholtz type resonator having an air chamber for forming a space by contact with a road surface and a narrow groove is provided. <P>SOLUTION: On the rib-like land 100 of the tire, an inclination groove 110, an inclination groove 120 and a partition wall 130 are formed, and the inclination groove 110 and the inclination groove 120 have a narrow groove part 112 and a narrow groove 122 communicated with the air chamber 111 and the air chamber 121 for forming the closed space respectively. A volume of a space communicated with a circumferential groove and formed of the narrow groove and the road surface is smaller than a volume of a closed space formed by the air chamber and the road surface. The inclination groove 110 and the inclination groove 120 extend so as to be inclined relative to a tire circumferential direction, and the resonator includes a resonance unit 101 and a resonance unit 201 adjacent to each other in the tire circumferential direction. Part of the resonance unit 101 is overlapped with part of the resonance unit 201 in a tread width direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、タイヤ周方向に沿って延びる周方向溝に隣接したリブ状陸部を備えるタイヤに関し、特に、気室部と狭窄溝部とを有するヘルムホルツ型共鳴器がリブ状陸部に設けられたタイヤに関する。   The present invention relates to a tire including a rib-like land portion adjacent to a circumferential groove extending along the tire circumferential direction, and in particular, a Helmholtz resonator having an air chamber portion and a narrowed groove portion is provided in the rib-like land portion. Regarding tires.

近年、乗用自動車などでは、車両騒音(風切り音や機械音など)の低減化が一層進展したことや、環境へのさらなる配慮に伴って、タイヤ騒音の低減化の要求が以前にも増して高まっている。   In recent years, demand for reducing tire noise has increased in passenger cars, etc., due to further progress in reducing vehicle noise (wind noise, mechanical noise, etc.) and further consideration for the environment. ing.

タイヤ騒音のうち、タイヤ周方向に沿って延びる周方向溝と路面とによって形成される空間に起因する気柱管共鳴音を低減するため、トレッドが路面と接触することによって一定の空間を形成する気室部と、気室部及び周方向溝に連通する狭窄溝部とを有するヘルムホルツ型共鳴器がタイヤ周方向に沿って延びるリブ状陸部に設けられたタイヤが知られている(例えば、特許文献1)。一般的に、このようなタイヤにおいて、ヘルムホルツ型共鳴器は、リブ状陸部に設けられるために、タイヤ周方向に沿って設けられることが多い。   Of the tire noise, in order to reduce air columnar resonance noise caused by the space formed by the circumferential groove extending along the tire circumferential direction and the road surface, a constant space is formed by the tread coming into contact with the road surface. A tire is known in which a Helmholtz resonator having an air chamber portion and a narrowed groove portion communicating with the air chamber portion and the circumferential groove is provided in a rib-like land portion extending along the tire circumferential direction (for example, a patent) Reference 1). Generally, in such a tire, since the Helmholtz resonator is provided in the rib-like land portion, it is often provided along the tire circumferential direction.

特開2008−179289号公報(第4−5頁、第3図)JP 2008-179289 A (page 4-5, FIG. 3)

しかしながら、上述した従来のタイヤには、次のような問題があった。すなわち、リブ状陸部に設けられたヘルムホルツ型共鳴器、具体的には気室部が小石などをかみ込む、いわゆる「石かみ」が起き易く、タイヤ騒音の増大原因となる。結局、気柱管共鳴音の低減に配慮したトレッドパターンであるにもかかわらず、タイヤ騒音を効果的に低減できない問題があった。勿論、気室部のサイズを大きくすれば、石かみは減少するが、気柱管共鳴音を効果的に低減できない場合や、リブ状陸部の剛性が不足する場合が発生し得る。   However, the conventional tire described above has the following problems. That is, a Helmholtz resonator provided in the rib-like land portion, specifically, a so-called “stone bite” in which the air chamber portion bites pebbles or the like easily occurs, which causes an increase in tire noise. Eventually, there was a problem that the tire noise could not be effectively reduced despite the tread pattern taking into account the reduction of air columnar resonance noise. Of course, if the size of the air chamber portion is increased, the stone bite is reduced, but the case where the air column resonance noise cannot be effectively reduced or the rigidity of the rib-like land portion is insufficient may occur.

そこで、本発明は、路面と接触することによって一定の空間を形成する気室部と、気室部及び周方向溝に連通する狭窄溝部とを有するヘルムホルツ型共鳴器がリブ状陸部に設けられる場合において、小石などのかみ込みの抑制、気柱管共鳴音の低減、及びリブ状陸部の剛性確保を高いレベルで実現したタイヤの提供を目的とする。   Accordingly, in the present invention, a Helmholtz resonator having an air chamber portion that forms a certain space by contacting with a road surface and a narrowed groove portion that communicates with the air chamber portion and the circumferential groove is provided in the rib-like land portion. In some cases, an object is to provide a tire that achieves a high level of suppression of biting of pebbles and the like, reduction of air column resonance noise, and securing of rigidity of the rib-like land portion.

上述した課題を解決するため、本発明は、次のような特徴を有している。まず、本発明の第1の特徴は、タイヤ周方向に沿って延びるリブ状陸部(リブ状陸部100)を備え、前記リブ状陸部の一方の側端に隣接して形成される第1周方向溝(周方向溝11)と、前記リブ状陸部の他方の側端に隣接して形成される第2周方向溝(周方向溝12)と
が形成されたタイヤ(空気入りタイヤ10)であって、前記リブ状陸部には、第1溝部(傾斜溝110)と、前記第1溝部に隣接する第2溝部(傾斜溝120)と、前記第1溝部と前記第2溝部とに隣接する隔壁部(隔壁130)とを含む共鳴器(共鳴器101、共鳴器201)が設けられ、前記第1溝部と前記第2溝部は、前記リブ状陸部が路面と接地することによって閉空間を形成する気室部(気室部111、気室部121)と、前記気室部に連通する狭窄溝部(狭窄溝部112、狭窄溝部122)とをそれぞれ有し、前記狭窄溝部の一端は、前記気室部と前記路面とによって形成される閉空間に連通するとともに、前記狭窄溝部の他端は、前記周方向溝に連通し、前記狭窄溝部と前記路面とによって形成される空間の容積は、前記前記気室部と前記路面とによって形成される前記閉空間の容積よりも小さく、前記第1溝部及び前記第2溝部は、タイヤ周方向に対して傾斜して延び、前記第1溝部の狭窄溝部の他端(端部112b)は、前記第1周方向溝に連通するとともに、前記第2溝部の狭窄溝部の他端(端部122b)は、前記第2周方向溝に連通し、前記共鳴器は、タイヤ周方向に沿って隣接する第1共鳴器(共鳴器101)と第2共鳴器(共鳴器201)とを含み、前記第1共鳴器の一部は、トレッド幅方向において、前記第2共鳴器の一部と重なることを要旨とする。
In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that a rib-shaped land portion (rib-shaped land portion 100) extending along the tire circumferential direction is provided, and is formed adjacent to one side end of the rib-shaped land portion. Tire (pneumatic tire) in which one circumferential groove (circumferential groove 11) and a second circumferential groove (circumferential groove 12) formed adjacent to the other side end of the rib-like land portion are formed. 10), and the rib-like land portion includes a first groove portion (inclined groove 110), a second groove portion (inclined groove 120) adjacent to the first groove portion, the first groove portion and the second groove portion. And a resonator (resonator 101, resonator 201) including a partition wall (partition wall 130) adjacent to each other, and the rib-shaped land portion is in contact with the road surface in the first groove portion and the second groove portion. Air chamber portions (air chamber portion 111, air chamber portion 121) that form a closed space by means of, and a narrowed groove portion that communicates with the air chamber portion ( A narrow groove portion 112 and a narrow groove portion 122), and one end of the narrow groove portion communicates with a closed space formed by the air chamber portion and the road surface, and the other end of the narrow groove portion is the circumference. The volume of the space that communicates with the directional groove and is formed by the narrowed groove portion and the road surface is smaller than the volume of the closed space that is formed by the air chamber portion and the road surface, and the first groove portion and the The second groove portion extends while inclining with respect to the tire circumferential direction, and the other end (end portion 112b) of the narrowed groove portion of the first groove portion communicates with the first circumferential groove, and the narrowed portion of the second groove portion. The other end (end portion 122b) of the groove portion communicates with the second circumferential groove, and the resonators are adjacent to the first resonator (resonator 101) and the second resonator (resonance) along the tire circumferential direction. A part of the first resonator, In Red width direction, it is summarized in that overlapping with a portion of the second resonator.

このようなタイヤによれば、第1溝部及び第2溝部は、気室部と、狭窄溝部とをそれぞれ有する。つまり、第1溝部及び第2溝部には、ヘルムホルツ型共鳴器がそれぞれ設けられる。また、このようなタイヤによれば、第1溝部及び第2溝部は、タイヤ周方向に対して傾斜する方向に向かって延びる。このため、リブ状陸部の踏み込み或いは蹴り出しの時に、第1溝部及び第2溝部の溝幅は、広がる。その結果、第1溝部及び第2溝部にかみ込まれていた石は、第1溝部及び第2溝部から排出され易くなる。   According to such a tire, the first groove portion and the second groove portion each have an air chamber portion and a narrowed groove portion. That is, Helmholtz resonators are provided in the first groove portion and the second groove portion, respectively. Moreover, according to such a tire, the 1st groove part and the 2nd groove part are extended toward the direction which inclines with respect to a tire circumferential direction. For this reason, when the rib-like land portion is stepped on or kicked out, the groove widths of the first groove portion and the second groove portion are widened. As a result, the stone that has been bitten in the first groove and the second groove is easily discharged from the first groove and the second groove.

また、このようなタイヤによれば、第1溝部及び第2溝部は、気室部をそれぞれ有する。また、第1溝部の延在方向と第2溝部の延在方向とは、反対の方向である。このため、第1溝部及び第2溝部は、所定の容積を必要とする2つの気室部を限られた幅のリブ状陸部に効率よく配置できる。つまり、このようなタイヤによれば、気柱管共鳴音を効果的に低減できる。   Moreover, according to such a tire, the 1st groove part and the 2nd groove part each have an air chamber part. In addition, the extending direction of the first groove part and the extending direction of the second groove part are opposite directions. For this reason, the 1st groove part and the 2nd groove part can arrange | position two air chamber parts which require a predetermined | prescribed volume efficiently to the rib-shaped land part of the limited width | variety. That is, according to such a tire, air columnar resonance noise can be effectively reduced.

さらに、第1共鳴器の一部は、トレッド幅方向において、第2共鳴器の一部と重なる。このため、リブ状陸部に溝部が形成される部分と形成されない部分とが交互に繰り返すタイヤに比べて、タイヤ周方向におけるリブ状陸部の剛性のバラツキを抑制できる。   Furthermore, a part of the first resonator overlaps a part of the second resonator in the tread width direction. For this reason, compared with the tire which repeats the part by which a groove part is formed in a rib-like land part, and the part which is not formed alternately, the variation in the rigidity of the rib-like land part in a tire peripheral direction can be suppressed.

従って、このようなタイヤによれば、気室部と、狭窄溝部とを有するヘルムホルツ型共鳴器が設けられる場合において、小石などのかみ込みの抑制、気柱管共鳴音の低減、及びリブ状陸部の剛性確保を高いレベルで実現したタイヤを提供できる。   Therefore, according to such a tire, when a Helmholtz type resonator having an air chamber portion and a constricted groove portion is provided, the biting of pebbles and the like is suppressed, the air column resonance noise is reduced, and the rib-shaped land is provided. A tire that achieves a high level of rigidity can be provided.

本発明の第2の特徴は、本発明の第1の特徴に係り、前記第1共鳴器を構成する前記第2溝部の狭窄溝部(狭窄溝部122)は、前記第2共鳴器を構成する前記第1溝部の狭窄溝部(狭窄溝部212)とトレッド幅方向において重なることを要旨とする。   A second feature of the present invention relates to the first feature of the present invention, wherein the narrowed groove portion (the narrowed groove portion 122) of the second groove portion constituting the first resonator constitutes the second resonator. The gist is that the first groove portion overlaps with the narrowed groove portion (the narrowed groove portion 212) in the tread width direction.

本発明の第3の特徴は、本発明の第2の特徴に係り、前記第1共鳴器を構成する前記第2溝部の狭窄溝部(狭窄溝部122)が前記第1周方向溝に向かって延びる方向は、前記第2共鳴器を構成する第1溝部の狭窄溝部(狭窄溝部212)が前記第2周方向溝から前記第2共鳴器を構成する前記第2溝部の気室部に向かって延びると方向と略同一であることを要旨とする。   A third feature of the present invention relates to the second feature of the present invention, wherein the narrowed groove portion (the narrowed groove portion 122) of the second groove portion constituting the first resonator extends toward the first circumferential groove. The direction is such that the narrowed groove portion (the narrowed groove portion 212) of the first groove portion constituting the second resonator extends from the second circumferential groove toward the air chamber portion of the second groove portion constituting the second resonator. The gist is that it is substantially the same as the direction.

本発明の第4の特徴は、本発明の第1乃至第3の特徴に係り、前記隔壁部のタイヤ径方向外側の端部は、前記リブ状陸部が前記路面と接地する接地面と略同一の高さに位置することを要旨とする。   A fourth feature of the present invention relates to the first to third features of the present invention, wherein the end portion of the partition wall portion on the outer side in the tire radial direction is substantially the same as a ground contact surface on which the rib-shaped land portion contacts the road surface. The gist is that they are located at the same height.

本発明の第5の特徴は、本発明の第4の特徴に係り、前記隔壁部は、トレッド幅方向及びタイヤ径方向に沿った断面において、タイヤ径方向外側に行くに連れて細くなるテーパー状であることを要旨とする。   A fifth feature of the present invention relates to the fourth feature of the present invention, wherein the partition wall portion has a tapered shape that becomes narrower toward the outer side in the tire radial direction in a cross section along the tread width direction and the tire radial direction. It is a summary.

本発明の第6の特徴は、本発明の第1乃至第5の特徴に係り、前記第1溝部は、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鋭角となる第1鋭角部分(鋭角部110a)と、前記隔壁部の他端から延び、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鈍角となる第1鈍角部分(鈍角部110b)とを含み、前記第2溝部は、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鋭角となる第2鋭角部分(鋭角部210a)と、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鈍角となる第2鈍角部分(鈍角部210b)とを含むことを要旨とする。   A sixth feature of the present invention relates to the first to fifth features of the present invention, wherein the first groove portion is formed by the partition wall portion and a side wall of the rib-like land portion in a tread surface view. An angle formed by the first acute angle portion (acute angle portion 110a) having an acute angle and the other end of the partition wall portion and formed by the partition wall portion and the side wall of the rib-like land portion in the tread surface view is an obtuse angle. A second obtuse angle part (obtuse angle part 110b), and the second groove part has an acute angle formed by the partition wall part and the side wall of the rib-like land part in a tread surface view. An acute angle portion (acute angle portion 210a) and a second obtuse angle portion (obtuse angle portion 210b) in which an angle formed by the partition wall and the side wall of the rib-like land portion is an obtuse angle in a tread surface view. The gist.

本発明の第7の特徴は、本発明の第6の特徴に係り、前記第1鋭角部分と前記第2鋭角部分とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として反対側に位置し、前記第1鈍角部分と前記第2鈍角部分とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として反対側に位置することを要旨とする。   A seventh feature of the present invention relates to the sixth feature of the present invention, wherein the first acute angle portion and the second acute angle portion are based on the center of the partition wall portion in the tire circumferential direction in a tread surface view. The gist is that the first obtuse angle portion and the second obtuse angle portion are located on the opposite side and located on the opposite side with respect to the center in the tire circumferential direction of the partition wall portion in the tread surface view.

本発明の第8の特徴は、本発明の第6又は第7の特徴に係り、前記第1鋭角部分の溝深さ(溝深さDP1)は、前記第1鈍角部分の溝深さ(溝深さDP2)よりも浅く、前記第2鋭角部分の溝深さ(溝深さD3)は、前記第2鈍角部分の溝深さ(溝深さD4)よりも浅いことを要旨とする。   An eighth feature of the present invention relates to the sixth or seventh feature of the present invention, wherein the groove depth (groove depth DP1) of the first acute angle portion is the groove depth (groove) of the first obtuse angle portion. The gist is that the groove depth (groove depth D3) of the second acute angle portion is shallower than the depth DP2) and the groove depth (groove depth D4) of the second obtuse angle portion.

本発明の第9の特徴は、本発明の第1乃至第8の特徴に係り、前記第1溝部と前記第2溝部とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として点対称であることを要旨とする。   A ninth feature of the present invention relates to the first to eighth features of the present invention, wherein the first groove portion and the second groove portion are based on the center of the partition wall portion in the tire circumferential direction in a tread surface view. The point is that it is point-symmetric.

本発明の特徴によれば、路面と接触することによって一定の空間を形成する気室部と、気室部及び周方向溝に連通する狭窄溝部とを有するヘルムホルツ型共鳴器がリブ状陸部に設けられる場合において、小石などのかみ込みの抑制、気柱管共鳴音の低減、及びリブ状陸部の剛性確保を高いレベルで実現したタイヤを提供することができる。   According to the features of the present invention, a Helmholtz resonator having an air chamber portion that forms a certain space by contacting with the road surface, and a narrowed groove portion that communicates with the air chamber portion and the circumferential groove is provided in the rib-like land portion. In the case where it is provided, it is possible to provide a tire that achieves a high level of suppression of biting of pebbles and the like, reduction of air column resonance noise, and securing of rigidity of the rib-like land portion.

本発明の実施形態に係る空気入りタイヤ10の一部正面図である。1 is a partial front view 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の一部断面図である。1 is a partial cross-sectional view of a pneumatic tire 10 according to an embodiment of the present invention. 本発明の実施形態に係るリブ状陸部100の形状を説明する拡大図である。It is an enlarged view explaining the shape of the rib-like land part 100 which concerns on embodiment of this invention. 本発明の実施形態に係る空気入りタイヤ10のパターン展開図の拡大図である。It is an enlarged view of a pattern development view of pneumatic tire 10 concerning an embodiment of the present invention. 図4に示す本発明の実施形態に係るリブ状陸部100のG―G線における断面図である。It is sectional drawing in the GG line of the rib-shaped land part 100 which concerns on embodiment of this invention shown in FIG. 本発明の実施形態に係るリブ状陸部300の形状を説明する拡大図である。It is an enlarged view explaining the shape of the rib-shaped land part 300 which concerns on embodiment of this invention. 図6に示す本発明の実施形態に係るリブ状陸部300のF7―F7線における断面図である。It is sectional drawing in the F7-F7 line | wire of the rib-shaped land part 300 which concerns on embodiment of this invention shown in FIG. 本発明の実施形態に係る空気入りタイヤ10のパターン展開図である。1 is a pattern development view of a pneumatic tire 10 according to an embodiment of the present invention. 図8に示す本発明の実施形態に係るリブ状陸部100のC−C線における断面図である。It is sectional drawing in CC line of the rib-shaped land part 100 which concerns on embodiment of this invention shown in FIG. 図8に示す本発明の実施形態に係るリブ状陸部100のB−B線における断面図である。It is sectional drawing in the BB line of the rib-shaped land part 100 which concerns on embodiment of this invention shown in FIG. 図8に示す本発明の実施形態に係るリブ状陸部100のA−A線における断面図である。It is sectional drawing in the AA of the rib-shaped land part 100 which concerns on embodiment of this invention shown in FIG. 図8に示す本発明の実施形態に係るリブ状陸部300のF−F線における断面図である。It is sectional drawing in the FF line of the rib-shaped land part 300 which concerns on embodiment of this invention shown in FIG. 図8に示す本発明の実施形態に係るリブ状陸部300のE−E線における断面図である。It is sectional drawing in the EE line of the rib-shaped land part 300 which concerns on embodiment of this invention shown in FIG. 図8に示す本発明の実施形態に係るリブ状陸部300のD−D線における断面図である。It is sectional drawing in the DD line of the rib-shaped land part 300 which concerns on embodiment of this invention shown in FIG.

次に、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)タイヤの全体概略構成、(2)リブ状陸部100の形状、(3)リブ状陸部300の形状、(4)リブ状陸部の断面形状、及び(5)作用・効果について説明する。   Next, an embodiment of a tire according to the present invention will be described with reference to the drawings. Specifically, (1) the overall schematic configuration of the tire, (2) the shape of the rib-like land portion 100, (3) the shape of the rib-like land portion 300, (4) the cross-sectional shape of the rib-like land portion, and (5 ) Explain the action and effect.

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。   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ていることは勿論である。   Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1)タイヤの全体概略構成
図1は、本実施形態係る空気入りタイヤ10の一部正面図である。図2は、空気入りタイヤ10の一部断面図である。
(1) Overall Schematic Configuration of Tire FIG. 1 is a partial front view of a pneumatic tire 10 according to this embodiment. FIG. 2 is a partial cross-sectional view of the pneumatic tire 10.

空気入りタイヤ10には、複数の周方向溝が形成される。また、空気入りタイヤ10には、当該周方向溝によって区画され、タイヤ周方向(図1の方向D1)に沿って延びる複数のリブ状陸部が設けられる。空気入りタイヤ10は、気柱管共鳴音などのタイヤ騒音の低減に配慮されたタイヤであり、高い静粛性が要求される乗用自動車などに装着される。なお、空気入りタイヤ10には、空気ではなく、窒素ガスなどの不活性ガスを充填してもよい。   A plurality of circumferential grooves are formed in the pneumatic tire 10. The pneumatic tire 10 is provided with a plurality of rib-like land portions that are partitioned by the circumferential groove and extend along the tire circumferential direction (direction D1 in FIG. 1). The pneumatic tire 10 is a tire that is designed to reduce tire noise such as air columnar resonance and is mounted on a passenger car or the like that requires high silence. The pneumatic tire 10 may be filled with an inert gas such as nitrogen gas instead of air.

具体的には、空気入りタイヤ10には、周方向溝11,12,21及び22が形成される。周方向溝11,12,21及び22は、タイヤ周方向に沿って延びる。   Specifically, circumferential grooves 11, 12, 21 and 22 are formed in the pneumatic tire 10. The circumferential grooves 11, 12, 21, and 22 extend along the tire circumferential direction.

周方向溝11と周方向溝12との間には、リブ状陸部100が形成される。周方向溝21と周方向溝22との間には、リブ状陸部300が形成される。   A rib-like land portion 100 is formed between the circumferential groove 11 and the circumferential groove 12. A rib-like land portion 300 is formed between the circumferential groove 21 and the circumferential groove 22.

(2)リブ状陸部100の形状
図3乃至5を用いて、リブ状陸部の形状について説明する。図3は、本発明の実施形態に係るリブ状陸部100の形状を説明する拡大図である。図4は、本発明の実施形態に係る空気入りタイヤ10のパターン展開図の拡大図である。図5は、本発明の実施形態に係るリブ状陸部100のトレッド幅方向及びタイヤ径方向に沿った断面図である。図4に示すように、リブ状陸部100には、ヘルムホルツ型共鳴器を構成する共鳴器101と、共鳴器201とが設けられる。共鳴器101は、傾斜溝110と、傾斜溝120と、隔壁130とを含む。共鳴器201は、傾斜溝210と、傾斜溝220と、隔壁230とを含む。共鳴器201は、共鳴器101にタイヤ周方向に沿って隣接する。共鳴器101の一部は、トレッド幅方向において、共鳴器201の一部と重なる。共鳴器101の傾斜溝120と、共鳴器201の傾斜溝210とは、タイヤ周方向に沿って長さS1だけ重なる。
(2) Shape of Rib Land Part 100 The shape of the rib land part will be described with reference to FIGS. FIG. 3 is an enlarged view for explaining the shape of the rib-like land portion 100 according to the embodiment of the present invention. FIG. 4 is an enlarged view of a pattern development view of the pneumatic tire 10 according to the embodiment of the present invention. FIG. 5 is a cross-sectional view of the rib-shaped land portion 100 according to the embodiment of the present invention along the tread width direction and the tire radial direction. As shown in FIG. 4, the rib-like land portion 100 is provided with a resonator 101 that constitutes a Helmholtz resonator and a resonator 201. The resonator 101 includes an inclined groove 110, an inclined groove 120, and a partition wall 130. The resonator 201 includes an inclined groove 210, an inclined groove 220, and a partition wall 230. The resonator 201 is adjacent to the resonator 101 along the tire circumferential direction. A part of the resonator 101 overlaps a part of the resonator 201 in the tread width direction. The inclined groove 120 of the resonator 101 and the inclined groove 210 of the resonator 201 overlap each other by a length S1 along the tire circumferential direction.

リブ状陸部100の陸部105には、傾斜溝110と、傾斜溝120と、隔壁130と、横溝106aと、横溝106bが形成される。   In the land portion 105 of the rib-like land portion 100, an inclined groove 110, an inclined groove 120, a partition wall 130, a lateral groove 106a, and a lateral groove 106b are formed.

(2.1)傾斜溝110の詳細形状
傾斜溝110は、第1溝部を構成し、タイヤ周方向に対して傾斜する方向に向かって延びる。傾斜溝110は、気室部111と、狭窄溝部112とを有する。つまり、リブ状陸部100には、気室部111と、狭窄溝部112とを有するヘルムホルツ型共鳴器である共鳴器101が設けられる。
(2.1) Detailed shape of the inclined groove 110 The inclined groove 110 forms a first groove portion and extends in a direction inclined with respect to the tire circumferential direction. The inclined groove 110 has an air chamber portion 111 and a narrowed groove portion 112. That is, the rib-like land portion 100 is provided with the resonator 101 that is a Helmholtz resonator having the air chamber portion 111 and the narrowed groove portion 112.

気室部111は、リブ状陸部100が路面と接地することによって閉空間を形成する。狭窄溝部112は、気室部111及び周方向溝11に連通する。具体的には、狭窄溝部112の一端は、気室部111と路面とによって形成される閉空間に連通する。狭窄溝部112の他端112bは、周方向溝11に連通する。   The air chamber portion 111 forms a closed space when the rib-like land portion 100 contacts the road surface. The narrowed groove 112 communicates with the air chamber 111 and the circumferential groove 11. Specifically, one end of the narrowed groove portion 112 communicates with a closed space formed by the air chamber portion 111 and the road surface. The other end 112 b of the narrowed groove portion 112 communicates with the circumferential groove 11.

狭窄溝部112と路面とによって形成される空間の容積は、気室部111と路面とによって形成される前記閉空間の容積よりも小さい。   The volume of the space formed by the narrowed groove portion 112 and the road surface is smaller than the volume of the closed space formed by the air chamber portion 111 and the road surface.

傾斜溝110は、トレッド面視において、鋭角部110aと鈍角部110bとを含む。具体的には、鋭角部110aは、第1鋭角部分を構成し、隔壁130から延び、トレッド面視において、隔壁130と、リブ状陸部100の側壁105aとによって形成される角度が鋭角となる。鈍角部110bは、第1鈍角部分を構成し、隔壁130から延び、トレッド面視において、隔壁130と、リブ状陸部100の側壁105bとによって形成される角度が鈍角となる。   The inclined groove 110 includes an acute angle portion 110a and an obtuse angle portion 110b in the tread surface view. Specifically, the acute angle portion 110a constitutes a first acute angle portion, extends from the partition wall 130, and an angle formed by the partition wall 130 and the side wall 105a of the rib-like land portion 100 is an acute angle in a tread surface view. . The obtuse angle portion 110b constitutes a first obtuse angle portion, extends from the partition wall 130, and an angle formed by the partition wall 130 and the side wall 105b of the rib-like land portion 100 is an obtuse angle in a tread surface view.

なお、共鳴器201の傾斜溝210は、傾斜溝110と同様に第1溝部を構成する。以下、傾斜溝210の構成を説明する。但し、傾斜溝210の構成は、傾斜溝110と同様であるため、詳細は、省略する。傾斜溝210は、気室部211と、狭窄溝部212とを有する。傾斜溝210は、トレッド面視において、鋭角部210aと鈍角部210bとを含む。具体的には、鋭角部210aは、トレッド面視において、隔壁230と、リブ状陸部100の側壁105cとによって形成される角度が鋭角となる。鈍角部210bは、トレッド面視において、隔壁230と、リブ状陸部100の側壁105dとによって形成される角度が鈍角となる。   Note that the inclined groove 210 of the resonator 201 constitutes a first groove portion in the same manner as the inclined groove 110. Hereinafter, the configuration of the inclined groove 210 will be described. However, since the configuration of the inclined groove 210 is the same as that of the inclined groove 110, details are omitted. The inclined groove 210 has an air chamber portion 211 and a narrowed groove portion 212. The inclined groove 210 includes an acute angle portion 210a and an obtuse angle portion 210b in the tread surface view. Specifically, the acute angle portion 210a has an acute angle formed by the partition wall 230 and the side wall 105c of the rib-like land portion 100 in the tread surface view. The obtuse angle portion 210b has an obtuse angle formed by the partition wall 230 and the side wall 105d of the rib-like land portion 100 in the tread surface view.

(2.2)傾斜溝120の詳細形状
傾斜溝110と傾斜溝120とは、トレッド面視において、隔壁130のタイヤ周方向における中心を基準として点対称である。従って、傾斜溝110と傾斜溝120とで共通する点の記載は、省略する。
(2.2) Detailed shape of the inclined groove 120 The inclined groove 110 and the inclined groove 120 are point-symmetric with respect to the center in the tire circumferential direction of the partition wall 130 in the tread surface view. Therefore, description of points common to the inclined groove 110 and the inclined groove 120 is omitted.

傾斜溝120は、第2溝部を構成し、タイヤ周方向に対して傾斜する方向に向かって延びる。具体的には、傾斜溝120は、隔壁130を隔てて傾斜溝110の反対側に形成され、傾斜溝110と反対の方向に向かって延びる。傾斜溝120は、気室部121と、狭窄溝部122とを有する。狭窄溝部122と路面とによって形成される空間の容積は、気室部121と路面とによって形成される閉空間の容積よりも小さい。狭窄溝部122の一端は、気室部121と路面とによって形成される閉空間に連通する。狭窄溝部122の他端122bは、周方向溝12に連通する。   The inclined groove 120 forms a second groove portion and extends in a direction inclined with respect to the tire circumferential direction. Specifically, the inclined groove 120 is formed on the opposite side of the inclined groove 110 with the partition wall 130 therebetween, and extends in a direction opposite to the inclined groove 110. The inclined groove 120 has an air chamber part 121 and a narrowed groove part 122. The volume of the space formed by the narrowed groove 122 and the road surface is smaller than the volume of the closed space formed by the air chamber 121 and the road surface. One end of the narrowed groove portion 122 communicates with a closed space formed by the air chamber portion 121 and the road surface. The other end 122 b of the narrowed groove portion 122 communicates with the circumferential groove 12.

傾斜溝120は、トレッド面視において鋭角部120aと、鈍角部120bとを含む。具体的には、鋭角部120aは、第2鋭角部分を構成し、隔壁130から延び、トレッド面視において、隔壁130と、リブ状陸部100の側壁105bとによって形成される角度が鋭角となる。鈍角部120bは、第2鈍角部分を構成し、隔壁130から延び、トレッド面視において、隔壁130と、リブ状陸部100の側壁105aとによって形成される角度が鈍角となる。   The inclined groove 120 includes an acute angle portion 120a and an obtuse angle portion 120b in the tread surface view. Specifically, the acute angle portion 120a constitutes a second acute angle portion, extends from the partition wall 130, and an angle formed by the partition wall 130 and the side wall 105b of the rib-like land portion 100 is an acute angle in the tread surface view. . The obtuse angle part 120b constitutes a second obtuse angle part, extends from the partition wall 130, and an angle formed by the partition wall 130 and the side wall 105a of the rib-like land part 100 is an obtuse angle in the tread surface view.

なお、共鳴器201の傾斜溝220は、傾斜溝120と同様に第2溝部を構成する。以下、傾斜溝220の構成を説明する。但し、傾斜溝220の構成は、傾斜溝120と同様であるため、詳細は、省略する。傾斜溝220は、気室部221と、狭窄溝部222とを有する。傾斜溝220は、トレッド面視において、鋭角部220aと鈍角部220bとを含む。具体的には、鋭角部220aは、トレッド面視において、隔壁230と、リブ状陸部100の側壁105dとによって形成される角度が鋭角となる。鈍角部220bは、トレッド面視において、隔壁230と、リブ状陸部100の側壁105cとによって形成される角度が鈍角となる。   Note that the inclined groove 220 of the resonator 201 constitutes a second groove portion in the same manner as the inclined groove 120. Hereinafter, the configuration of the inclined groove 220 will be described. However, since the configuration of the inclined groove 220 is the same as that of the inclined groove 120, details are omitted. The inclined groove 220 has an air chamber portion 221 and a narrowed groove portion 222. The inclined groove 220 includes an acute angle portion 220a and an obtuse angle portion 220b in the tread surface view. Specifically, the acute angle portion 220a has an acute angle formed by the partition wall 230 and the side wall 105d of the rib-like land portion 100 in the tread surface view. The obtuse angle part 220b has an obtuse angle formed by the partition wall 230 and the side wall 105c of the rib-like land part 100 in the tread surface view.

(2.3)隔壁130の詳細形状
図5は、図4に示す本実施形態係るリブ状陸部100のG−G線における断面図である。図4、5に示すように、隔壁130は、傾斜溝110と傾斜溝120とに隣接する。隔壁130は、傾斜溝110と傾斜溝120とを仕切り、タイヤ周方向に延びる。隔壁130は、トレッド幅方向及びタイヤ径方向に沿った断面において、タイヤ径方向外側に行くに連れて細くなるテーパー状である。隔壁130のタイヤ径方向外側の端部である上端部130cは、リブ状陸部100が路面と接地する接地面、つまり、陸部105と略同一の高さに位置する。
(2.3) Detailed Shape of Partition Wall 130 FIG. 5 is a cross-sectional view taken along line GG of the rib-like land portion 100 according to the present embodiment shown in FIG. As shown in FIGS. 4 and 5, the partition wall 130 is adjacent to the inclined groove 110 and the inclined groove 120. The partition wall 130 partitions the inclined groove 110 and the inclined groove 120 and extends in the tire circumferential direction. The partition wall 130 has a tapered shape that becomes narrower toward the outer side in the tire radial direction in a cross section along the tread width direction and the tire radial direction. An upper end portion 130 c that is an end portion of the partition wall 130 on the outer side in the tire radial direction is located at a height substantially equal to the ground contact surface on which the rib-like land portion 100 contacts the road surface, that is, the land portion 105.

(3)リブ状陸部300の形状
図6、7を用いて、リブ状陸部の形状について説明する。図6は、本発明の実施形態に係るリブ状陸部300の形状を説明する拡大図である。図7は、図6に示す本発明の実施形態に係るリブ状陸部300のF7−F7線における断面図である。リブ状陸部300の陸部305には、傾斜溝310と、隔壁320とが形成される。傾斜溝310は、気室部311と、狭窄溝部312とを有する。つまり、リブ状陸部300には、気室部311と、狭窄溝部312とを有するヘルムホルツ型共鳴器である共鳴器301が設けられる。傾斜溝310は、傾斜溝110、傾斜溝120と同様に、トレッド面視において鋭角部310aと、鈍角部310bとを含む。
(3) Shape of rib-like land portion 300 The shape of the rib-like land portion will be described with reference to FIGS. FIG. 6 is an enlarged view for explaining the shape of the rib-like land portion 300 according to the embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line F7-F7 of the rib-like land portion 300 according to the embodiment of the present invention shown in FIG. In the land portion 305 of the rib-like land portion 300, an inclined groove 310 and a partition wall 320 are formed. The inclined groove 310 includes an air chamber 311 and a narrowed groove 312. That is, the rib-like land portion 300 is provided with a resonator 301 that is a Helmholtz resonator having an air chamber portion 311 and a narrowed groove portion 312. Like the inclined groove 110 and the inclined groove 120, the inclined groove 310 includes an acute angle portion 310a and an obtuse angle portion 310b in the tread surface view.

(4)リブ状陸部の断面形状
図8乃至14を用いて、リブ状陸部の断面形状について説明する。図8は、本発明の実施形態に係る空気入りタイヤ10のパターン展開図である。図9は、図8に示す本発明の実施形態に係るリブ状陸部100のC−C線における断面図である。図10は、図8に示す本発明の実施形態に係るリブ状陸部100のB−B線における断面図である。図11は、図8に示す本発明の実施形態に係るリブ状陸部100のA−A線における断面図である。図12は、図8に示す本発明の実施形態に係るリブ状陸部300のF−F線における断面図である。図13は、図8に示す本発明の実施形態に係るリブ状陸部300のE−E線における断面図である。図14は、図8に示す本発明の実施形態に係るリブ状陸部300のD−D線における断面図である。
(4) Cross-sectional shape of rib-like land portion The cross-sectional shape of the rib-like land portion will be described with reference to FIGS. FIG. 8 is a pattern development view of the pneumatic tire 10 according to the embodiment of the present invention. FIG. 9 is a cross-sectional view taken along line CC of the rib-like land portion 100 according to the embodiment of the present invention shown in FIG. 10 is a cross-sectional view taken along line BB of the rib-like land portion 100 according to the embodiment of the present invention shown in FIG. FIG. 11 is a cross-sectional view taken along line AA of the rib-like land portion 100 according to the embodiment of the present invention shown in FIG. 12 is a cross-sectional view taken along line FF of the rib-like land portion 300 according to the embodiment of the present invention shown in FIG. FIG. 13 is a cross-sectional view taken along line EE of rib-like land portion 300 according to the embodiment of the present invention shown in FIG. FIG. 14 is a cross-sectional view taken along line DD of the rib-like land portion 300 according to the embodiment of the present invention shown in FIG.

図9乃至図11に示すように、傾斜溝120のタイヤ径方向の溝深さは、鋭角部120aから鈍角部120bにいくに連れて深くなる。つまり、鋭角部120aの溝深さDP3は、鈍角部120bの溝深さDP4よりも浅い。なお、図9乃至図11では、図示していないが、傾斜溝110のタイヤ径方向の溝深さは、傾斜溝120と同様である。具体的には、傾斜溝110のタイヤ径方向の溝深さは、鋭角部110aから鈍角部110bにいくに連れて深くなる。つまり、鋭角部110aの溝深さDP1は、鈍角部110bの溝深さDP2(不図示)よりも浅い。   As shown in FIGS. 9 to 11, the groove depth in the tire radial direction of the inclined groove 120 becomes deeper from the acute angle portion 120a to the obtuse angle portion 120b. That is, the groove depth DP3 of the acute angle portion 120a is shallower than the groove depth DP4 of the obtuse angle portion 120b. Although not illustrated in FIGS. 9 to 11, the groove depth in the tire radial direction of the inclined groove 110 is the same as that of the inclined groove 120. Specifically, the groove depth in the tire radial direction of the inclined groove 110 becomes deeper as it goes from the acute angle portion 110a to the obtuse angle portion 110b. That is, the groove depth DP1 of the acute angle portion 110a is shallower than the groove depth DP2 (not shown) of the obtuse angle portion 110b.

図12乃至図14に示すように、傾斜溝310のタイヤ径方向の溝深さは、鋭角部310aから鈍角部310bにいくに連れて深くなる。つまり、鋭角部310aの溝深さDP5は、鈍角部310bの溝深さDP6よりも浅い。   As shown in FIG. 12 to FIG. 14, the groove depth in the tire radial direction of the inclined groove 310 becomes deeper from the acute angle portion 310a to the obtuse angle portion 310b. That is, the groove depth DP5 of the acute angle portion 310a is shallower than the groove depth DP6 of the obtuse angle portion 310b.

(5)作用・効果
空気入りタイヤ10によれば、傾斜溝110及び傾斜溝120は、気室部111(気室部121)と、狭窄溝部112(狭窄溝部122)とをそれぞれ有する。つまり、傾斜溝110及び傾斜溝120には、ヘルムホルツ型共鳴器がそれぞれ設けられる。
(5) Action / Effect According to the pneumatic tire 10, the inclined groove 110 and the inclined groove 120 have the air chamber portion 111 (air chamber portion 121) and the narrowed groove portion 112 (narrowed groove portion 122), respectively. That is, the inclined groove 110 and the inclined groove 120 are each provided with a Helmholtz resonator.

また、空気入りタイヤ10によれば、傾斜溝110及び傾斜溝120は、タイヤ周方向に対して傾斜する方向に向かって延びる。このため、リブ状陸部100の踏み込み或いは蹴り出しの時に、傾斜溝110及び傾斜溝120の溝幅は、広がる。その結果、傾斜溝110及び傾斜溝120にかみ込まれていた石は、傾斜溝110及び傾斜溝120から排出され易くなる。   Further, according to the pneumatic tire 10, the inclined groove 110 and the inclined groove 120 extend in a direction inclined with respect to the tire circumferential direction. For this reason, the groove width of the inclined groove 110 and the inclined groove 120 is widened when the rib-like land portion 100 is stepped on or kicked out. As a result, the stone that has been caught in the inclined groove 110 and the inclined groove 120 is easily discharged from the inclined groove 110 and the inclined groove 120.

また、空気入りタイヤ10によれば、傾斜溝110と傾斜溝120は、気室部111(気室部121)をそれぞれ有する。また、傾斜溝110の延在方向と傾斜溝120の延在方向とは、反対の方向である。このため、傾斜溝110及び傾斜溝120は、所定の容積を必要とする2つの気室部111及び気室部121を限られた幅のリブ状陸部100に効率よく配置できる。つまり、空気入りタイヤ10によれば、気柱管共鳴音を効果的に低減できる。   Moreover, according to the pneumatic tire 10, the inclined groove 110 and the inclined groove 120 have the air chamber part 111 (air chamber part 121), respectively. Further, the extending direction of the inclined groove 110 and the extending direction of the inclined groove 120 are opposite directions. For this reason, the inclined groove 110 and the inclined groove 120 can efficiently arrange the two air chamber portions 111 and the air chamber portions 121 that require a predetermined volume in the rib-like land portion 100 having a limited width. That is, according to the pneumatic tire 10, air columnar resonance noise can be effectively reduced.

さらに、共鳴器101の一部は、トレッド幅方向において、共鳴器201の一部と重なる。このため、リブ状陸部に溝部が形成される部分と形成されない部分とが交互に繰り返すタイヤに比べて、タイヤ周方向におけるリブ状陸部の剛性のバラツキを抑制できる。   Furthermore, a part of the resonator 101 overlaps a part of the resonator 201 in the tread width direction. For this reason, compared with the tire which repeats the part by which a groove part is formed in a rib-like land part, and the part which is not formed alternately, the variation in the rigidity of the rib-like land part in a tire peripheral direction can be suppressed.

従って、このような空気入りタイヤ10によれば、気室部と、狭窄溝部とを有するヘルムホルツ型共鳴器(共鳴器101、共鳴器201)が設けられる場合において、小石などのかみ込みの抑制、気柱管共鳴音の低減、及びリブ状陸部の剛性確保を高いレベルで実現したタイヤを提供できる。   Therefore, according to such a pneumatic tire 10, when a Helmholtz type resonator (resonator 101, resonator 201) having an air chamber portion and a narrowed groove portion is provided, suppression of biting of pebbles and the like, It is possible to provide a tire that achieves a high level of reduction in air column resonance noise and securing rigidity of the rib-like land portion.

本実施形態によれば、共鳴器101と共鳴器201とにおいて、狭窄溝部122及び狭窄溝部212の向かって延びる方向は、略同一である。このため、リブ状陸部100の剛性を大きく低下させることなく、リブ状陸部100の剛性のバラツキを更に抑制できる。   According to the present embodiment, in the resonator 101 and the resonator 201, the extending directions toward the narrowed groove portion 122 and the narrowed groove portion 212 are substantially the same. For this reason, the rigidity variation of the rib-like land portion 100 can be further suppressed without greatly reducing the rigidity of the rib-like land portion 100.

本実施形態によれば、リブ状陸部100には、傾斜溝110と傾斜溝120とを仕切り、タイヤ周方向に延びる隔壁130が形成される。また、隔壁130の上端部130cは、路面と接地する接地面と略同一の高さに位置する。このため、空気入りタイヤ10が路面に接地した時に、リブ状陸部100には、2つのヘルムホルツ型共鳴器を設けることができる。従って、空気入りタイヤ10によれば、気柱管共鳴音を更に効果的に低減できる。   According to the present embodiment, the rib-like land portion 100 is formed with the partition wall 130 that partitions the inclined groove 110 and the inclined groove 120 and extends in the tire circumferential direction. Further, the upper end portion 130c of the partition wall 130 is located at substantially the same height as the ground contact surface that contacts the road surface. For this reason, when the pneumatic tire 10 contacts the road surface, the rib-like land portion 100 can be provided with two Helmholtz resonators. Therefore, according to the pneumatic tire 10, air columnar resonance noise can be further effectively reduced.

本実施形態によれば、隔壁130は、トレッド幅方向及びタイヤ径方向に沿った断面において、タイヤ径方向外側に行くに連れて細くなるテーパー状である。このため、隔壁130は、小石と接する部分が減少し、小石のかみ込みを抑制できる。   According to the present embodiment, the partition wall 130 has a tapered shape that becomes narrower toward the outer side in the tire radial direction in the cross section along the tread width direction and the tire radial direction. For this reason, as for the partition 130, the part which contact | connects a pebble reduces and it can suppress the biting of a pebble.

また、隔壁130により仕切られる傾斜溝110及び傾斜溝120の溝幅は、タイヤ径方向外側に行くに連れて細くなるテーパー状の隔壁130により、タイヤ径方向外側に行くに連れて広くなる。このため、傾斜溝110及び傾斜溝120にかみ込まれていた石は、傾斜溝110及び傾斜溝120から更に排出され易くなる。   Further, the groove widths of the inclined groove 110 and the inclined groove 120 partitioned by the partition wall 130 become wider toward the outer side in the tire radial direction by the tapered partition wall 130 that becomes thinner toward the outer side in the tire radial direction. For this reason, the stone that has been caught in the inclined groove 110 and the inclined groove 120 is more easily discharged from the inclined groove 110 and the inclined groove 120.

本実施形態によれば、傾斜溝110は、トレッド面視において、リブ状陸部100の側壁105a及び隔壁130によって形成される角度が鋭角となる鋭角部110aと、リブ状陸部100の側壁105b及び隔壁130によって形成される角度が鈍角となる鈍角部110bとを含む。このため、鋭角部110aと、鈍角部110bとを含む傾斜溝110は、タイヤ周方向に縦長に延びる形状になる。   According to the present embodiment, the inclined groove 110 includes the acute angle portion 110a having an acute angle formed by the side wall 105a and the partition wall 130 of the rib-like land portion 100 and the side wall 105b of the rib-like land portion 100 in the tread surface view. And an obtuse angle portion 110b having an obtuse angle formed by the partition wall 130. For this reason, the inclined groove 110 including the acute angle portion 110a and the obtuse angle portion 110b has a shape extending vertically in the tire circumferential direction.

同様に、傾斜溝120は、トレッド面視において、鋭角部120aと、鈍角部120bとを含む。つまり、鋭角部120aと、鈍角部120bとが有する角度は、鋭角と、鈍角とであるため、鋭角部120aと、鈍角部120bとを含む傾斜溝120は、タイヤ周方向に縦長に延びる形状になる。従って、傾斜溝110及び傾斜溝120は、所定の容積を必要とする2つの気室部111及び気室部121を限られた幅のリブ状陸部100に更に効率よく配置できる。   Similarly, the inclined groove 120 includes an acute angle portion 120a and an obtuse angle portion 120b in the tread surface view. That is, since the angles of the acute angle portion 120a and the obtuse angle portion 120b are an acute angle and an obtuse angle, the inclined groove 120 including the acute angle portion 120a and the obtuse angle portion 120b has a shape that extends vertically in the tire circumferential direction. Become. Therefore, the inclined groove 110 and the inclined groove 120 can more efficiently arrange the two air chamber portions 111 and the air chamber portions 121 that require a predetermined volume in the rib-like land portion 100 having a limited width.

本実施形態によれば、鋭角部110aの溝深さDP1は、鈍角部110bの溝深さDP2よりも浅い。鋭角部110aは、鈍角部110bよりも溝幅が狭い部分であるため、鈍角部110bよりも小石をかみ込み易いことが懸念される。しかしながら、このような鋭角部110aによれば、溝深さDP1は、溝深さDP2よりも浅いため、鋭角部110aに生じる小石のかみ込みを抑制できる。また、リブ状陸部100の踏み込み或いは蹴り出しの時に、かみ込まれていた石は、鋭角部110aから排出され易くなる。   According to this embodiment, the groove depth DP1 of the acute angle portion 110a is shallower than the groove depth DP2 of the obtuse angle portion 110b. Since the acute angle part 110a is a part whose groove width is narrower than the obtuse angle part 110b, there is a concern that the acute angle part 110a is likely to bite pebbles more than the obtuse angle part 110b. However, according to such an acute angle portion 110a, since the groove depth DP1 is shallower than the groove depth DP2, the biting of pebbles occurring in the acute angle portion 110a can be suppressed. Further, when the rib-shaped land portion 100 is stepped on or kicked out, the stone that has been bitten is easily discharged from the acute angle portion 110a.

本実施形態によれば、傾斜溝110と傾斜溝120とは、トレッド面視において、前記隔壁130のタイヤ周方向における中心を基準として点対称である。つまり、傾斜溝110及び傾斜溝120は、所定の容積を必要とする2つの気室部111及び気室部121を限られた幅のリブ状陸部100に更に効率よく配置できる。   According to the present embodiment, the inclined groove 110 and the inclined groove 120 are point-symmetric with respect to the center of the partition wall 130 in the tire circumferential direction in the tread surface view. That is, the inclined groove 110 and the inclined groove 120 can more efficiently arrange the two air chamber portions 111 and the air chamber portions 121 that require a predetermined volume in the rib-like land portion 100 having a limited width.

(6)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ろう。
(6) 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, examples and operational techniques will be apparent to those skilled in the art.

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。   For example, the embodiment of the present invention can be modified as follows.

空気入りタイヤ10では、リブ状陸部100、リブ状陸部300に共鳴器101、及び共鳴器201が形成されている場合について説明した。しかし、共鳴器は、全ての陸部に形成されてもよい。   In the pneumatic tire 10, the case where the resonator 101 and the resonator 201 are formed in the rib-like land portion 100 and the rib-like land portion 300 has been described. However, the resonator may be formed on all land portions.

上述した実施形態では、周方向溝11,12,21,22は、タイヤ周方向に沿って直線状に延びていたが、周方向溝は、タイヤ周方向に沿って延びていれば、必ずしも直線状に限らず、ジグザグ状や波形状でもよい。   In the embodiment described above, the circumferential grooves 11, 12, 21, and 22 extend linearly along the tire circumferential direction. However, if the circumferential grooves extend along the tire circumferential direction, they are not necessarily straight. The shape is not limited to a zigzag shape and a wave shape.

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.

10…タイヤ、11,12,21,22…周方向溝、100…リブ状陸部、101…共鳴器、105…陸部、105a、105b、…側壁、106a、106b…横溝、110…傾斜溝、110a…鋭角部、110b…鈍角部、111…気室部、112…狭窄溝部、120…傾斜溝、120a…鋭角部、120b…鈍角部、121…気室部、122…狭窄溝部、130…隔壁、130c…上端部、201…共鳴器、210a…鋭角部、210b…鈍角部、300…リブ状陸部、301…共鳴器、305…陸部、310…傾斜溝、310a…鋭角部、310b…鈍角部、311…気室部、312…狭窄溝部、320…隔壁 DESCRIPTION OF SYMBOLS 10 ... Tire, 11, 12, 21, 22 ... Circumferential groove | channel, 100 ... Rib-like land part, 101 ... Resonator, 105 ... Land part, 105a, 105b, ... Side wall, 106a, 106b ... Lateral groove, 110 ... Inclined groove 110a ... acute angle part, 110b ... obtuse angle part, 111 ... air chamber part, 112 ... narrowed groove part, 120 ... inclined groove, 120a ... acute angle part, 120b ... obtuse angle part, 121 ... air chamber part, 122 ... constricted groove part, 130 ... Bulkhead, 130c ... Upper end, 201 ... Resonator, 210a ... Acute angle portion, 210b ... Oblique angle portion, 300 ... Rib-shaped land portion, 301 ... Resonator, 305 ... Land portion, 310 ... Inclined groove, 310a ... Acute angle portion, 310b ... obtuse angle part, 311 ... air chamber part, 312 ... narrowed groove part, 320 ... partition wall

Claims (9)

タイヤ周方向に沿って延びるリブ状陸部を備え、
前記リブ状陸部の一方の側端に隣接して形成される第1周方向溝と、
前記リブ状陸部の他方の側端に隣接して形成される第2周方向溝と
が形成されたタイヤであって、
前記リブ状陸部には、
第1溝部と、
前記第1溝部に隣接する第2溝部と、
前記第1溝部と前記第2溝部とに隣接する隔壁部と
を含む共鳴器が設けられ、
前記第1溝部と前記第2溝部は、
前記リブ状陸部が路面と接地することによって閉空間を形成する気室部と、
前記気室部に連通する狭窄溝部と
をそれぞれ含み、
前記狭窄溝部の一端は、前記気室部と前記路面とによって形成される閉空間に連通するとともに、前記狭窄溝部の他端は、前記周方向溝に連通し、
前記狭窄溝部と前記路面とによって形成される空間の容積は、前記前記気室部と前記路面とによって形成される前記閉空間の容積よりも小さく、
前記第1溝部及び、前記第2溝部は、タイヤ周方向に対して傾斜して延び、
前記第1溝部の狭窄溝部の他端は、前記第1周方向溝に連通するとともに、前記第2溝部の狭窄溝部の他端は、前記第2周方向溝に連通し、
前記共鳴器は、タイヤ周方向に沿って隣接する第1共鳴器と第2共鳴器(共鳴器201)とを含み、
前記第1共鳴器の一部は、トレッド幅方向において、前記第2共鳴器の一部と重なるタイヤ。
Rib-like land portion extending along the tire circumferential direction,
A first circumferential groove formed adjacent to one side end of the rib-like land portion;
A tire formed with a second circumferential groove formed adjacent to the other side end of the rib-shaped land portion,
In the rib-like land portion,
A first groove,
A second groove adjacent to the first groove;
A resonator including a partition wall adjacent to the first groove and the second groove;
The first groove and the second groove are
An air chamber portion that forms a closed space by the rib-shaped land portion contacting the road surface;
Each including a narrowed groove portion communicating with the air chamber portion,
One end of the narrowed groove portion communicates with a closed space formed by the air chamber portion and the road surface, and the other end of the narrowed groove portion communicates with the circumferential groove.
The volume of the space formed by the narrowed groove portion and the road surface is smaller than the volume of the closed space formed by the air chamber portion and the road surface,
The first groove portion and the second groove portion extend while inclining with respect to the tire circumferential direction,
The other end of the narrowed groove portion of the first groove portion communicates with the first circumferential groove, and the other end of the narrowed groove portion of the second groove portion communicates with the second circumferential groove,
The resonator includes a first resonator and a second resonator (resonator 201) adjacent to each other along the tire circumferential direction,
A part of the first resonator overlaps with a part of the second resonator in the tread width direction.
前記第1共鳴器を構成する前記第2溝部の狭窄溝部(狭窄溝部122)は、前記第2共鳴器を構成する前記第1溝部の狭窄溝部(狭窄溝部212)とトレッド幅方向において重なる請求項1に記載のタイヤ。   The narrowed groove portion (narrowed groove portion 122) of the second groove portion constituting the first resonator overlaps with the narrowed groove portion (narrowed groove portion 212) of the first groove portion constituting the second resonator in the tread width direction. The tire according to 1. 前記第1共鳴器を構成する前記第2溝部の狭窄溝部(狭窄溝部122)が前記第1周方向溝に向かって延びる方向は、前記第2共鳴器を構成する第1溝部の狭窄溝部(狭窄溝部212)が前記第2周方向溝から前記第2共鳴器を構成する前記第2溝部の気室部に向かって延びると方向と略同一である請求項2に記載のタイヤ。   The direction in which the constriction groove portion (constriction groove portion 122) of the second groove portion constituting the first resonator extends toward the first circumferential groove is the constriction groove portion (constriction of the first groove portion constituting the second resonator). 3. The tire according to claim 2, wherein the groove portion 212) has substantially the same direction as the groove portion 212) extending from the second circumferential groove toward the air chamber portion of the second groove portion constituting the second resonator. 前記隔壁部のタイヤ径方向外側の端部は、前記リブ状陸部が前記路面と接地する接地面と略同一の高さに位置する請求項1乃至3の何れか一項に記載のタイヤ。   The tire according to any one of claims 1 to 3, wherein an end portion of the partition wall portion on the outer side in the tire radial direction is positioned at substantially the same height as a ground contact surface on which the rib-shaped land portion contacts the road surface. 前記隔壁部は、トレッド幅方向及びタイヤ径方向に沿った断面において、タイヤ径方向外側に行くに連れて細くなるテーパー状である請求項4に記載のタイヤ。   5. The tire according to claim 4, wherein the partition wall portion has a tapered shape that becomes thinner toward the outer side in the tire radial direction in a cross section along the tread width direction and the tire radial direction. 前記第1溝部は、
前記隔壁部の一端から延び、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鋭角となる第1鋭角部分と、
前記隔壁部の他端から延び、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鈍角となる第1鈍角部分と
を含み、
前記第2溝部は、
前記隔壁部の他端から延び、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鋭角となる第2鋭角部分と、
前記隔壁部の一端から延び、トレッド面視において、前記隔壁部と、前記リブ状陸部の側壁とによって形成される角度が鈍角となる第2鈍角部分と
を含む請求項1乃至5の何れか一項に記載のタイヤ。
The first groove is
A first acute angle portion that extends from one end of the partition wall and has an acute angle formed by the partition wall and the side wall of the rib-like land portion in a tread surface view;
The first obtuse angle portion that extends from the other end of the partition wall and includes an obtuse angle formed by the partition wall and the side wall of the rib-like land portion in a tread surface view,
The second groove is
A second acute angle portion that extends from the other end of the partition wall and has an acute angle formed by the partition wall and the side wall of the rib-like land portion in a tread surface view;
6. The device according to claim 1, comprising: a second obtuse angle portion extending from one end of the partition wall portion and having an obtuse angle formed by the partition wall portion and a side wall of the rib-like land portion in a tread surface view. The tire according to one item.
前記第1鋭角部分と前記第2鋭角部分とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として反対側に位置し、
前記第1鈍角部分と前記第2鈍角部分とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として反対側に位置する請求項6に記載のタイヤ。
The first acute angle portion and the second acute angle portion are located on opposite sides with respect to the center of the partition wall portion in the tire circumferential direction in a tread surface view,
The tire according to claim 6, wherein the first obtuse angle portion and the second obtuse angle portion are located on opposite sides with respect to a center in the tire circumferential direction of the partition wall portion in a tread surface view.
前記第1鋭角部分の溝深さは、前記第1鈍角部分の溝深さよりも浅く、
前記第2鋭角部分の溝深さは、前記第2鈍角部分の溝深さよりも浅い請求項6又は請求項7に記載のタイヤ。
The groove depth of the first acute angle portion is shallower than the groove depth of the first obtuse angle portion,
The tire according to claim 6 or 7, wherein a groove depth of the second acute angle portion is shallower than a groove depth of the second obtuse angle portion.
前記第1溝部と前記第2溝部とは、トレッド面視において、前記隔壁部のタイヤ周方向における中心を基準として点対称である請求項1乃至8の何れか一項に記載のタイヤ。   The tire according to any one of claims 1 to 8, wherein the first groove portion and the second groove portion are point-symmetric with respect to a center of the partition wall portion in the tire circumferential direction in a tread surface view.
JP2009133950A 2009-06-03 2009-06-03 tire Expired - Fee Related JP5271813B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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JP2014166827A (en) * 2013-02-28 2014-09-11 Bridgestone Corp Pneumatic tire
CN105283326A (en) * 2013-04-25 2016-01-27 株式会社普利司通 Pneumatic tire
USD750010S1 (en) 2013-04-26 2016-02-23 Bridgestone Corporation Tread portion of an automobile tire
USD926669S1 (en) 2019-06-11 2021-08-03 Bridgestone Corporation Tire tread

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JPH0310909A (en) * 1989-06-06 1991-01-18 Bridgestone Corp Pneumatic tire
JP2002316515A (en) * 2001-04-24 2002-10-29 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2003326918A (en) * 2002-05-13 2003-11-19 Bridgestone Corp Pneumatic tire
WO2004103737A1 (en) * 2003-05-21 2004-12-02 Bridgestone Corporation Pneumatic tire and method of designing tread pattern of the tire
JP2008143332A (en) * 2006-12-08 2008-06-26 Bridgestone Corp Pneumatic tire
WO2009047999A1 (en) * 2007-10-12 2009-04-16 Bridgestone Corporation Pneumatic tire

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Publication number Priority date Publication date Assignee Title
JPH0310909A (en) * 1989-06-06 1991-01-18 Bridgestone Corp Pneumatic tire
JP2002316515A (en) * 2001-04-24 2002-10-29 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2003326918A (en) * 2002-05-13 2003-11-19 Bridgestone Corp Pneumatic tire
WO2004103737A1 (en) * 2003-05-21 2004-12-02 Bridgestone Corporation Pneumatic tire and method of designing tread pattern of the tire
JP2008143332A (en) * 2006-12-08 2008-06-26 Bridgestone Corp Pneumatic tire
WO2009047999A1 (en) * 2007-10-12 2009-04-16 Bridgestone Corporation Pneumatic tire

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014166827A (en) * 2013-02-28 2014-09-11 Bridgestone Corp Pneumatic tire
CN105283326A (en) * 2013-04-25 2016-01-27 株式会社普利司通 Pneumatic tire
US10744824B2 (en) 2013-04-25 2020-08-18 Bridgestone Corporation Pneumatic tire
USD750010S1 (en) 2013-04-26 2016-02-23 Bridgestone Corporation Tread portion of an automobile tire
USD926669S1 (en) 2019-06-11 2021-08-03 Bridgestone Corporation Tire tread

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