JPH05131813A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH05131813A JPH05131813A JP3297274A JP29727491A JPH05131813A JP H05131813 A JPH05131813 A JP H05131813A JP 3297274 A JP3297274 A JP 3297274A JP 29727491 A JP29727491 A JP 29727491A JP H05131813 A JPH05131813 A JP H05131813A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- main groove
- thin film
- groove
- film plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0318—Tread patterns irregular patterns with particular pitch sequence
-
- 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
- B60C2011/0383—Blind or isolated grooves at the centre of the tread
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として乗用車用の空
気入りラジアルタイヤ、特に濡れた路面（ウエット路
面）での良好な排水性の確保と、トレッドパターンノイ
ズの低減との両立を可能にした空気入りタイヤに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to achieve both good radial drainage mainly for passenger cars, especially on a wet road surface (wet road surface), while ensuring good drainage and reducing tread pattern noise. It relates to a pneumatic tire.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】タイヤか
ら発生する騒音のうち、最も大きいのがパターンノイズ
である。このパターンノイズはタイヤと路面との相互作
用で発生する騒音で、その主たる発生原因は、タイヤト
レッドパターンの溝に包まれた空気が、タイヤの転動に
より路面から離れるとき、あるいは路面に踏み込むとき
に外部に排出される所謂ポンピング作用によるものであ
り、このポンピング作用によりパターン溝による気柱内
に定状波が生じて各溝の気柱が共鳴振動を起しノイズと
なる。このパターンノイズは、パターンピッチの通過す
る頻度に一致した周波数およびそのハーモニクスでの音
が支配的になる。2. Description of the Related Art Of the noise generated from a tire, the largest is pattern noise. This pattern noise is the noise generated by the interaction between the tire and the road surface, and its main cause is when the air wrapped in the groove of the tire tread pattern separates from the road surface due to the rolling of the tire or when it steps on the road surface. This is due to the so-called pumping action that is discharged to the outside, and by this pumping action, a fixed wave is generated in the air column due to the pattern groove, and the air column in each groove causes resonance vibration and becomes noise. The pattern noise is dominated by the frequency and the harmonics of the pattern pitch.
【０００３】通常、乗用車用等のタイヤにおいて、前記
の走行時のパターンノイズを低減しようとするときの主
な方策としては、タイヤ接地面内における接地部分比率
を大きくする方法が一般に取られている。したがってタ
イヤの非接地部分であるトレッドパターンの溝幅は細く
なる。Generally, in a tire for a passenger car or the like, as a main measure for reducing the pattern noise during running, a method of increasing a ground contact portion ratio in a tire ground contact surface is generally adopted. .. Therefore, the groove width of the tread pattern, which is the non-ground portion of the tire, becomes narrow.
【０００４】また一方、ウエット路面走行時のタイヤに
おける排水性を改良し向上させようとする時は、逆にタ
イヤの接地部分比率を小さくする。すなわちトレッドパ
ターンの溝幅は大きくなる。On the other hand, when it is desired to improve and improve the drainage performance of a tire during running on a wet road surface, on the contrary, the ground contact portion ratio of the tire is reduced. That is, the groove width of the tread pattern becomes large.
【０００５】したがって、それぞれタイヤとして重要な
パターンノイズ低減と排水性向上の両特性は、トレッド
パターンからみると二律背反性を持ち、これら両特性を
両立させることが甚だしく困難なものとなっている。Therefore, both the characteristics of pattern noise reduction and drainage improvement, which are important for tires, have a trade-off between the tread patterns, and it is extremely difficult to achieve both of these characteristics at the same time.
【０００６】そこで、本発明においては、気柱の共鳴振
動を起すトレッドパターンにおけるタイヤ周方向に連続
する主溝について、共鳴振動の周波数に乱れを生じさせ
てピーク周波数帯およびそのハーモニクスを分散させて
ホワイトノイズ化することにより、ウエット路面走行時
の排水性を損なわずにパターンノイズを低減できるよう
にし、これら両特性を両立させることができる空気入り
タイヤを提供しようとするものである。In view of the above, in the present invention, the main groove that is continuous in the tire circumferential direction in the tread pattern that causes the resonance vibration of the air column is disturbed in the frequency of the resonance vibration to disperse the peak frequency band and its harmonics. By making white noise, it is possible to reduce the pattern noise without impairing the drainage property when traveling on a wet road surface, and to provide a pneumatic tire that can achieve both of these characteristics.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決する本
発明の空気入りタイヤは、複数本のタイヤ周方向に連続
する主溝を含むトレッドパターンを有するタイヤにおい
て、トレードパターンの各主溝には、それぞれ周方向の
所要間隔毎に、主溝による気柱の共鳴振動を減衰する幅
方向の薄膜板を設けてなることを特徴とする。A pneumatic tire of the present invention for solving the above-mentioned problems is a tire having a tread pattern including a plurality of main grooves continuous in the tire circumferential direction, wherein each main groove of a trade pattern is Is characterized in that a thin film plate in the width direction is provided for damping the resonance vibration of the air column due to the main groove at each required interval in the circumferential direction.
【０００８】前記の薄膜板は、各主溝のタイヤ接地面内
での接地長さと略同程度もしくはこれより小さい間隔毎
に設けておくのが望ましい。It is desirable that the thin film plate is provided at intervals substantially equal to or smaller than the contact length of each main groove in the tire contact surface.
【０００９】また前記の薄膜板は、主溝の一方もしくは
両側面より溝断面の一部を遮断する張出し形状、あるい
は溝断面を完全に遮断する形状をなすものよりなる。こ
れらの薄膜板は主溝からタイヤ幅方向に延びる横溝の排
水性を損なわない位置に設けておくのがよい。Further, the thin film plate is formed to have an overhanging shape that cuts off a part of the groove cross section from one or both side surfaces of the main groove, or a shape that completely cuts off the groove cross section. It is preferable that these thin film plates be provided at positions where the drainage of the lateral grooves extending from the main groove in the tire width direction is not impaired.
【００１０】[0010]
【作用】タイヤはその走行中、周方向に連続するトレッ
ドパターンの主溝と接地路面との間で形成される気柱の
ポンピング作用および気柱共鳴振動によりパターンノイ
ズが発生するが、上記の本発明のタイヤによれば、気柱
を形成する主溝のタイヤ周方向の所要間隔毎に幅方向の
薄膜板を設けてあるため、主溝による気柱管に前記薄膜
板による障害で空気脈流が生じ、各主溝による気柱の共
鳴振動の周波数を、前記空気脈流で打ち消しランダム化
するように作用し、このため主溝の幅を小さくしなくて
もホワイトノイズ化してパターンノイズが低減する。While the tire is running, pattern noise occurs due to the pumping action and air column resonance vibration of the air column formed between the main groove of the tread pattern continuous in the circumferential direction and the ground contact road surface. According to the tire of the invention, since the thin film plate in the width direction is provided at every required interval in the tire circumferential direction of the main groove forming the air column, the air pulsation due to the obstacle due to the thin film plate in the air column tube due to the main groove. Occurs, and the frequency of the resonance vibration of the air column due to each main groove is canceled by the air pulsation flow and randomized. Therefore, even if the width of the main groove is not reduced, it becomes white noise and pattern noise is reduced. To do.
【００１１】特に、前記の薄膜板が、各主溝のタイヤ接
地面内での接地長さと略同程度もしくはこれより小さい
間隔毎に配設されていると、タイヤ接地面内において各
主溝に少なくとも１つの薄膜板が存することとなり、前
記の周波数の打ち消し作用が連続して行なわれ、ノイズ
低減を一層良好になす。In particular, if the above-mentioned thin film plates are arranged at intervals substantially equal to or smaller than the ground contact length of each main groove in the tire ground contact surface, each of the main grooves is arranged in the tire ground contact surface. Since at least one thin film plate is present, the above-described frequency canceling action is continuously performed, and the noise reduction is further improved.
【００１２】しかも、前記のように薄膜板を設けたこと
により、主溝の幅を小さくしなくてもパターンノイズを
低減できる上、主溝への浸水を排水するタイプか、ある
いは浸水までに跳ね飛ばすタイプか等の主溝の果す役割
に応じて、溝断面の一部を遮断する張出し形状の薄膜
板、あるいは溝断面を完全に遮断する形状の薄膜板を適
宜使い分け、またその配設位置を考慮することで、ウエ
ット路面走行時の排水性を損わない形で実施することが
できる。Moreover, by providing the thin film plate as described above, the pattern noise can be reduced without reducing the width of the main groove, and the main groove is of a type in which water is drained or splashed before the water is inundated. Depending on the role played by the main groove, such as the flying type, a thin film plate with an overhanging shape that cuts off a part of the groove cross section or a thin film plate that completely cuts off the groove cross section is used as appropriate, and the placement position By taking this into consideration, it can be carried out in a form that does not impair the drainage property when traveling on a wet road surface.
【００１３】[0013]
【実施例】次に本発明の実施例を図面に基いて説明す
る。Embodiments of the present invention will now be described with reference to the drawings.
【００１４】図１はタイヤ（Ｔ）のトレッドパターンの
接地面部分を示す平面図であり、図２は薄膜板が設けら
れた主溝（３）の一部を示し、図３は薄膜板の断面形状
の数例を示している。FIG. 1 is a plan view showing a contact surface portion of a tread pattern of a tire (T), FIG. 2 shows a part of a main groove (3) provided with a thin film plate, and FIG. 3 shows a thin film plate. Several examples of sectional shape are shown.
【００１５】タイヤ（Ｔ）のトレッド部（１）外周のト
レッドパターンは、図１に示すように、タイヤ周方向に
連続する複数本（図の場合４本）の主溝（３）と、この
主溝（３）からタイヤ幅方向（横方向）に斜めに延びた
比較的細幅の横溝（５）とを有し、これによりパターン
形成されている。図では前記溝以外にもさらに細い縦横
のスリットも形成されている。As shown in FIG. 1, the tread pattern on the outer circumference of the tread portion (1) of the tire (T) includes a plurality of (4 in the case of the figure) main grooves (3) continuous in the tire circumferential direction. It has a relatively narrow lateral groove (5) extending obliquely in the tire width direction (lateral direction) from the main groove (3), and is patterned by this. In the figure, in addition to the above-mentioned grooves, narrower vertical and horizontal slits are also formed.
【００１６】前記の主溝（３）としては、ストレートリ
ブだけでなく、若干ジクザク状をなす波状リブでタイヤ
周方向に直線的に見とおせる部分を有する溝をも含む。
特にこの発明でいう主溝（３）は、タイヤ周方向に連続
する溝の中でも比較的広幅の溝、例えば溝幅が１ｃｍ程
度以上のものをいう。The above-mentioned main groove (3) includes not only straight ribs but also grooves having a slightly zigzag wavy rib and having a portion which can be seen linearly in the tire circumferential direction.
In particular, the main groove (3) referred to in the present invention is a groove having a relatively wide width among the grooves continuous in the tire circumferential direction, for example, a groove having a groove width of about 1 cm or more.
【００１７】（７）は前記の各主溝（３）の周方向所要
間隔毎にトレッドゴムにより一体に形成された幅方向の
薄膜板であり、主溝（３）による気柱の共鳴振動を減衰
するように設けられている。この薄膜板（７）は、各主
溝（３）それぞれのタイヤ接地面（Ａ）内での接地長さ
（Ｌ1 ）（Ｌ2 ）と同程度もしくはこれより小さい間隔
で配設してしておくのがよい。(7) is a width-direction thin film plate integrally formed of tread rubber at required intervals in the circumferential direction of each of the main grooves (3), and the resonance vibration of the air column by the main grooves (3) is generated. It is provided to attenuate. The thin film plate (7) is arranged at intervals equal to or smaller than the contact length (L1) (L2) in the tire contact surface (A) of each main groove (3). Is good.
【００１８】すなわち、タイヤの接地面（Ａ）は、図１
のように略楕円形になり、そのため各主溝（３）の接地
長さ（Ｌ1 ）（Ｌ2 ）も異なる。したがって各主溝
（３）の前記接地面（Ａ）内での接地長さ（Ｌ1 ）（Ｌ
2 ）と同じか、これよりやや短い間隔で配設しておけ
ば、各主溝（３）の薄膜板（７）がランダムに配設され
て、かつ常に変化するタイヤ接地面（Ａ）における各主
溝（３）にはそれぞれ少なくとも１つの薄膜板（７）が
常時存在することになる。That is, the ground contact surface (A) of the tire is shown in FIG.
As described above, the main grooves (3) have different contact lengths (L1) (L2). Therefore, the contact length (L1) (L) of each main groove (3) in the contact surface (A)
If it is the same as or slightly shorter than 2), the thin film plate (7) of each main groove (3) is randomly arranged and the tire ground contact surface (A) is constantly changing. At least one thin film plate (7) is always present in each main groove (3).
【００１９】また、前記接地長さ（Ｌ1 ）（Ｌ2 ）と同
じか、ごく僅かに大きい間隔で薄膜板（７）が配設され
ている場合も、接地面（Ａ）内における主溝（３）に薄
膜板（７）が存さないのは一瞬であって、断続して薄膜
板（７）が存することになるので、前記の場合と殆ど変
らないパターンノイズ低減の効果が得られる。In addition, even when the thin film plates (7) are arranged at an interval which is the same as or slightly larger than the ground contact lengths (L1) and (L2), the main groove (3) in the ground contact surface (A). The thin film plate (7) does not exist in () for a moment, and the thin film plate (7) exists intermittently. Therefore, the effect of pattern noise reduction which is almost the same as the above case can be obtained.
【００２０】前記の薄膜板（７）の数があまり多くなる
と、排水性を低下させかつノイズ低減の効果もかえって
期待できなくなるので、タイヤ接地面（Ａ）内において
各主溝（３）毎に１もしくは２の薄膜板（７）が存する
間隔で設けるのが特に好ましい。When the number of the thin film plates (7) is too large, the drainage performance is lowered and the noise reduction effect cannot be expected, so that it cannot be expected in the tire ground contact surface (A) for each main groove (3). It is particularly preferable that the thin film plate (1) or the thin film plate (7) is provided at an interval.
【００２１】前記の薄膜板（７）の形状としては、図３
（ａ）に示すように主溝（３）の断面形状に対しその両
側面より溝内にヒレ状に張出した形状、あるいは同図
（ｂ）や同図（ｃ）のように主溝（３）の片側面よりヒ
レ状に張出した形状等、溝断面を一部的に遮断する種々
の形状にでき、また同図（ｄ）のように溝断面を完全に
遮断する形状にすることもできる。これらの薄膜板
（７）の形状は、タイヤの形態、特に扁平率やパターン
形状、あるいは主溝への浸水を排水するタイプや浸水ま
でに跳ね飛ばして排水するタイプ等、それぞれの主溝
（３）の果す役割および排水性に応じて、１種もしくは
複数を適宜使い分けすることでができ、これによりウエ
ット路面走行時の排水性を損わない形で実施することが
できる。The shape of the thin film plate (7) is shown in FIG.
As shown in (a), the cross-sectional shape of the main groove (3) has a fin-like shape protruding from both side surfaces into the groove, or the main groove (3) as shown in FIGS. ) Various shapes that partially cut off the groove cross section, such as a fin-like shape protruding from one side surface, or a shape that completely cuts off the groove cross section as shown in FIG. .. The shape of these thin film plates (7) is the shape of the tire, in particular the flatness and pattern shape, or the type that drains water into the main groove or the type that bounces and drains water before flooding. It is possible to properly use one kind or a plurality of kinds depending on the role played by (1) and the drainage property, and this can be carried out in a form that does not impair the drainage property when traveling on a wet road surface.
【００２２】例えば、扁平率（Ｈ／Ｗ：タイヤ高さＨと
タイヤ幅Ｗの比）が６５〜８０％のタイヤの場合、ウエ
ット路面走行時の排水作用は、水が主溝へ浸入する前の
段階でトレッド面で水を跳ね飛ばして大部分を排水する
ものであり、図３（ｄ）の溝断面を完全に遮断する形状
の薄膜板（７）を使用しても排水性に問題がない。For example, in the case of a tire having a flatness ratio (H / W: ratio of tire height H to tire width W) of 65 to 80%, the drainage action during running on a wet road surface is before water enters the main groove. At this stage, most of the water is drained by splashing water on the tread surface, and even if a thin film plate (7) with a shape that completely cuts off the groove cross section of FIG. Absent.
【００２３】また扁平率が５０％以下のタイヤは、主溝
に浸入した水を排水するが、もともと溝幅が大きくて排
水性が高くなっているため、前記の薄膜板（７）を設け
ても排水性には殆ど影響がない。特に図３の（ａ）
（ｂ）（ｃ）の溝断面を一部的に遮断する形状の薄膜板
（７）の場合には、主溝（３）の流通性を保持できるた
めに、良好な排水性を保持できる。したがってウエット
路面走行時の排水性を損わない形で実施することができ
る。A tire having a flatness of 50% or less drains water that has entered the main groove, but since the groove width is originally large and drainage is high, the thin film plate (7) is provided. However, it has almost no effect on drainage. In particular, FIG. 3 (a)
In the case of the thin film plate (7) of (b) and (c) that partially cuts off the groove cross section, good drainage can be maintained because the flowability of the main groove (3) can be maintained. Therefore, it can be carried out in a form that does not impair drainage when traveling on a wet road surface.
【００２４】いずれにしても、前記の薄膜板（７）は、
図１にも示すように主溝（３）から幅方向に延びる横溝
（５）の排水性を損なわない位置に設けるのが望まし
い。In any case, the thin film plate (7) is
As shown in FIG. 1, it is desirable to provide the lateral groove (5) extending in the width direction from the main groove (3) at a position where the drainage property is not impaired.
【００２５】前記の薄膜板（７）の厚みは、走行による
衝撃や摩擦で破損したり消滅することがないように、
１．０ｍｍ以上のものがよい。しかし余り厚みが大きく
なりすぎると、ノイズ低減効果が小さくなりかつ排水性
も劣るので、好ましくは１．０〜２．０ｍｍのものとす
る。The thickness of the above-mentioned thin film plate (7) is such that it will not be damaged or disappear due to shock or friction during running,
It is preferably 1.0 mm or more. However, if the thickness is too large, the noise reduction effect becomes small and the drainage property becomes poor. Therefore, the thickness is preferably 1.0 to 2.0 mm.
【００２６】上記のような薄膜板（７）は、タイヤ加硫
金型において、タイヤの主溝（３）に相当する凸起に切
目を入れておけば、タイヤ加硫中にトレッドゴムが前記
切目に流入することで形成される。In the tire vulcanization mold, the thin film plate (7) as described above is provided with notches in the protrusions corresponding to the main grooves (3) of the tire. It is formed by flowing into the cut.
【００２７】そして上記のように薄膜板（７）が設けら
れたタイヤであると、その走行中、周方向に連続するト
レッドパターンの主溝（３）と接地路面との間で形成さ
れる気柱のポンピング作用および共鳴振動によりパター
ンノイズが発生するが、主溝（３）による気柱管に前記
薄膜板（７）による障害で空気脈流が生じることとなっ
て、各主溝（３）による気柱の共鳴振動の周波数が前記
空気脈流で打ち消されて減衰し、主溝（３）の幅を小さ
くしなくても、パターンノイズがホワイトノイズ化し、
その結果パターンノイズそのものが低減することにな
る。When the tire is provided with the thin film plate (7) as described above, the air formed between the main groove (3) of the tread pattern which is continuous in the circumferential direction and the ground contact road surface while the tire is running. Pattern noise occurs due to the pumping action and resonance vibration of the columns, but an air pulsation flow is generated in the air column tube due to the main groove (3) due to the obstacle due to the thin film plate (7), and each main groove (3). The frequency of resonance vibration of the air column due to is canceled by the air pulsation and is attenuated, and the pattern noise becomes white noise without reducing the width of the main groove (3),
As a result, the pattern noise itself is reduced.
【００２８】殊にタイヤ接地面内において各主溝（３）
に少なくとも１つの薄膜板（７）が存するように形成さ
れている場合、前記の周波数の打ち消し作用が連続して
行なわれ、ノイズ低減効果が一層良好になる。Each main groove (3) especially in the tire ground contact plane
When at least one thin film plate (7) is formed in the above, the frequency canceling action is continuously performed, and the noise reducing effect is further improved.
【００２９】このように、主溝（３）の幅を小さくしな
いでパターンノイズを低減でき、したがって上記したよ
うに薄膜板の形状をタイヤ形態等に応じて使い分けでき
ることもあって、排水性を損なわないでパターンノイズ
を低減できるののである。In this way, the pattern noise can be reduced without reducing the width of the main groove (3), and therefore, the shape of the thin film plate can be properly used according to the tire form as described above, which impairs drainage performance. Without it, the pattern noise can be reduced.
【００３０】（テスト１）図１に示すトレッドパターン
のタイヤについて、厚み１．５ｍｍの薄膜板を設けたも
の（実施例）と、設けていないもの（比較例）につい
て、次のとおり回転ドラム試験機によりノイズテスト
（気柱共鳴振動試験）を実施した。(Test 1) Regarding the tires of the tread pattern shown in FIG. 1, those having a thin film plate having a thickness of 1.5 mm (Example) and those not having the thin film plate (Comparative Example) were subjected to the following rotary drum test. A noise test (air column resonance vibration test) was performed by a machine.
【００３１】 ・ タイヤサイズ：１８５／７０Ｒ１４ ８７Ｓ チュ
ーブレス ・ タイヤ空気圧：２．０ｋｇｆ／ｃｍ2 ・ リ ム ：１４×５1/2 −Ｊ 荷 重 ：３５０ｋｇ ・ 試験速度 ：６０ｋｍ／ｈ 上記の試験結果を示す図４によれば、一次および二次の
ピーク周波数帯域において、実施例の場合（図面実線）
それぞれ音圧レベルが低下し、すなわちピーク周波数帯
における気柱共鳴振動を減衰でき、パターンノズルを低
減できることになった。Tire size: 185 / 70R14 87S tubeless Tire pressure: 2.0 kgf / cm 2 Lim: 14 × 5 1/2 -J load: 350 kg Test speed: 60 km / h The above test results are shown According to FIG. 4, in the first and second peak frequency bands, the case of the embodiment (solid line in the drawing)
The sound pressure level is lowered, that is, the air column resonance vibration in the peak frequency band can be attenuated, and the pattern nozzles can be reduced.
【００３２】（テスト２）また、ハイドロプレーニング
実車試験を、上記と同サイズのタイヤで薄膜板を設けた
もの（実施例）と、設けていないもの（比較例）につい
て下記のように実施した。(Test 2) Further, a hydroplaning actual vehicle test was carried out as follows for a tire having the same size as that described above and provided with a thin film plate (Example) and one not provided (Comparative Example).
【００３３】 ・ タイヤサイズ：１８５／７０Ｒ１４ ８７Ｓ チュ
ーブレス ・ タイヤ空気圧：２．０ｋｇｆ／ｃｍ2 ・ リ ム ：１４×５1/2 −Ｊ ・ テスト車 ：国産車 荷 重 ：１名乗車 ・ 薄膜板の厚み：１．５ｍｍ ・ 薄膜板の形状：主溝断面形状と同一 ・ 薄膜板の枚数：各主溝にそれぞれ８枚 このテスト結果によると、薄膜板を設けた実施例、およ
び薄膜板を設けていない比較例の場合のいずれも、ハイ
ドロプレーニングの発生速度は１１０ｋｍ／ｈで同一で
あり、薄膜板を設けていても設けていないものと変らな
い排水性を確保できた。・ Tire size: 185 / 70R14 87S tubeless ・ Tire air pressure: 2.0 kgf / cm 2・ Lim: 14 × 5 1/2 -J ・ Test car: Domestic car load: 1 passenger ・ Thin film thickness : 1.5 mm-Shape of thin-film plate: Same as main groove cross-section-Number of thin-film plates: 8 in each main groove According to this test result, the example in which the thin-film plate was provided and the thin-film plate was not provided In each of the comparative examples, the rate of hydroplaning was 110 km / h, which was the same, and the drainage property was the same as that without the thin film plate.
【００３４】[0034]
【発明の効果】上記したように本発明の空気入りタイヤ
によれば、気柱振動を起すトレッドパターンにおけるタ
イヤ周方向に連続する主溝について、周方向所要間隔に
設けた薄膜板により共鳴振動の周波数に乱れを生じさせ
て、ピーク周波数帯およびそのハーモニクスを分散させ
てホワイトノイズ化することができ、従来のように主溝
の幅を小さくすることなくパターンノイズを低減でき
る。特にタイヤ形態や主溝の果す役割に応じて、溝断面
の一部を遮断する形状の薄膜板や溝断面を完全に遮断す
る形状の薄膜板を適宜使い分けることで、ウエット路面
走行時の排水性を損わない形で実施することができ、そ
れゆえ、ウエット路面走行時の排水性を損なわずにパタ
ーンノイズを低減でき、これら両特性を両立させること
ができるのである。As described above, according to the pneumatic tire of the present invention, with respect to the main groove continuous in the tire circumferential direction in the tread pattern which causes air column vibration, resonance vibration is caused by the thin film plate provided at a required circumferential interval. It is possible to generate a disturbance in the frequency and disperse the peak frequency band and its harmonics to generate white noise, and it is possible to reduce the pattern noise without reducing the width of the main groove as in the conventional case. In particular, depending on the tire form and the role of the main groove, by properly using a thin film plate that partially blocks the groove cross section or a thin film plate that completely blocks the groove cross section, drainage performance during wet road surface running Therefore, it is possible to reduce the pattern noise without impairing the drainage property during traveling on a wet road surface, and it is possible to achieve both of these characteristics at the same time.
【図１】本発明の１実施例を示すタイヤ接地面内のパタ
ーン形状を示す平面図である。FIG. 1 is a plan view showing a pattern shape in a tire ground contact plane showing an embodiment of the present invention.
【図２】薄膜板を設けた主溝部分一部の断面斜視図であ
る。FIG. 2 is a cross-sectional perspective view of a part of a main groove portion provided with a thin film plate.
【図３】（ａ）（ｂ）（ｃ）（ｄ）はそれぞれ薄膜板の
形状を例示する断面図である。3A, 3B, 3C, and 3D are cross-sectional views illustrating the shape of a thin film plate.
【図４】回転ドラム試験による気柱共鳴振動の周波数と
音圧レベルの関係を示すグラフである。FIG. 4 is a graph showing the relationship between the frequency of air column resonance vibration and the sound pressure level in a rotating drum test.
（Ｔ） タイヤ （１） トレッド部 （３） 主溝 （５） 横溝 （７） 薄膜板 （Ａ） タイヤ接地面 (T) Tire (1) Tread part (3) Main groove (5) Lateral groove (7) Thin film plate (A) Tire contact surface
Claims (4)
含むトレッドパターンを有するタイヤにおいて、トレー
ドパターンの各主溝には、それぞれ周方向の所要間隔毎
に、主溝による気柱の共鳴振動を減衰する幅方向の薄膜
板を設けてなることを特徴とする空気入りタイヤ。1. A tire having a tread pattern including a plurality of main grooves continuous in the tire circumferential direction, wherein each main groove of the trade pattern has a resonance of an air column due to the main groove at each required interval in the circumferential direction. A pneumatic tire comprising a width direction thin film plate for damping vibration.
接地長さと略同程度もしくはこれより小さい間隔毎に設
けられている請求項１に記載の空気入りタイヤ。2. The pneumatic tire according to claim 1, wherein the thin film plates are provided at intervals substantially equal to or smaller than the contact length of each main groove in the tire contact surface.
り溝断面の一部を遮断する張出し形状、あるいは溝断面
を完全に遮断する形状をなすものよりなる請求項１また
は２に記載空気入りタイヤ。3. The air according to claim 1 or 2, wherein the thin film plate has an overhanging shape that cuts off a part of the groove cross section from one or both side surfaces of the main groove, or a shape that completely cuts off the groove cross section. Included tires.
る横溝の排水性を損なわない位置に設けられている請求
項１〜３のいずれか１項に記載の空気入りタイヤ。4. The pneumatic tire according to claim 1, wherein the thin film plate is provided at a position that does not impair the drainage property of the lateral groove extending from the main groove in the tire width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297274A JPH05131813A (en) | 1991-11-13 | 1991-11-13 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3297274A JPH05131813A (en) | 1991-11-13 | 1991-11-13 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05131813A true JPH05131813A (en) | 1993-05-28 |
Family
ID=17844406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3297274A Withdrawn JPH05131813A (en) | 1991-11-13 | 1991-11-13 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05131813A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002293109A (en) * | 2001-03-29 | 2002-10-09 | Toyo Tire & Rubber Co Ltd | Pneumatic radial tire |
| JP2005297698A (en) * | 2004-04-09 | 2005-10-27 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| KR100860217B1 (en) * | 2007-09-12 | 2008-09-24 | 금호타이어 주식회사 | Tread pattern assembly of ultra high performance tire for all seasons |
| WO2013076233A1 (en) * | 2011-11-25 | 2013-05-30 | Compagnie Generale Des Etablissements Michelin | Mould comprising a cavity for moulding a device for closure in a groove |
| JP2015502275A (en) * | 2011-11-25 | 2015-01-22 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Mold having a cavity for forming a closure device in a groove |
-
1991
- 1991-11-13 JP JP3297274A patent/JPH05131813A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002293109A (en) * | 2001-03-29 | 2002-10-09 | Toyo Tire & Rubber Co Ltd | Pneumatic radial tire |
| JP2005297698A (en) * | 2004-04-09 | 2005-10-27 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| KR100860217B1 (en) * | 2007-09-12 | 2008-09-24 | 금호타이어 주식회사 | Tread pattern assembly of ultra high performance tire for all seasons |
| WO2013076233A1 (en) * | 2011-11-25 | 2013-05-30 | Compagnie Generale Des Etablissements Michelin | Mould comprising a cavity for moulding a device for closure in a groove |
| FR2983115A1 (en) * | 2011-11-25 | 2013-05-31 | Michelin Soc Tech | MOLD COMPRISING A CAVITY FOR MOLDING A CLOSURE DEVICE IN A GROOVE |
| JP2015501739A (en) * | 2011-11-25 | 2015-01-19 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Mold with cavity for molding device for closure in groove |
| JP2015502275A (en) * | 2011-11-25 | 2015-01-22 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | Mold having a cavity for forming a closure device in a groove |
| US9616627B2 (en) | 2011-11-25 | 2017-04-11 | Compagnie Generale Des Etablissements Michelin | Mold comprising a cavity for molding a device for closure in a groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990204 |