JPH0425364Y2 - - Google Patents
Info
- Publication number
- JPH0425364Y2 JPH0425364Y2 JP1039484U JP1039484U JPH0425364Y2 JP H0425364 Y2 JPH0425364 Y2 JP H0425364Y2 JP 1039484 U JP1039484 U JP 1039484U JP 1039484 U JP1039484 U JP 1039484U JP H0425364 Y2 JPH0425364 Y2 JP H0425364Y2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- tire
- fin
- protrusion
- shoulder
- 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.)
- Expired
Links
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
Landscapes
- Tires In General (AREA)
Description
【考案の詳細な説明】 この考案は、低騒音空気入りタイヤに関する。[Detailed explanation of the idea] This invention relates to a low noise pneumatic tire.
自動車用の空気入りタイヤとして、そのトレツ
ド面にタイヤ円周方向に連続する縦溝を設けて横
滑り抵抗を大きくし操縦性を良好にしたリブタイ
ヤ、およびタイヤ円周方向中心線の左右両側にそ
れぞれほぼ幅方向（子午線方向）の横溝を、その
一端がタイヤシヨルダ端で外部に開口し他端が上
記中心線の外側（シヨルダ側）に位置し左右の横
溝が互いに接続されないように多数設けて牽引力
を大きくすると共にタイヤシヨルダ部の放熱性を
良好にしたラグタイヤ、さらに上記の縦溝と横溝
の双方を設けて上記のリブタイヤおよびラグタイ
ヤの特性を兼備させたリブラグタイヤ、すなわち
タイヤ円周方向中心線付近に少なくとも一本の縦
溝を設け、この縦溝のシヨルダ側に多数本の横溝
をその一端がタイヤシヨルダ端で外側に開口し他
端が上記縦溝内または縦溝のシヨルダ側に位置す
るように設けたタイヤが知られており、かつこれ
らのタイヤにおいて、その縦溝または横溝の溝壁
にひれ状突片を溝幅方向に突設することにより、
接地時のポンピング作用による気流の速度を緩和
する一方、縦溝または横溝が形成する気柱共鳴管
の周波数を分散して聴感レベルを低下させるよう
にしたものが知られている（実開昭58−22301号
公報参照）。 As pneumatic tires for automobiles, rib tires have vertical grooves that extend in the tire circumferential direction on the tread surface to increase skidding resistance and improve maneuverability. A large number of lateral grooves in the width direction (meridian direction) are provided so that one end opens to the outside at the tire shoulder end and the other end is located outside the center line (shoulder side) so that the left and right lateral grooves are not connected to each other to increase traction force. At the same time, a lug tire with good heat dissipation in the tire shoulder part, and a rib lug tire with both the above-mentioned vertical grooves and lateral grooves to have the characteristics of the above-mentioned rib tire and lug tire, that is, at least one tire near the center line in the circumferential direction of the tire. A tire is provided with a vertical groove, and a large number of horizontal grooves on the shoulder side of the vertical groove, one end of which opens outward at the tire shoulder end, and the other end located within the vertical groove or on the shoulder side of the vertical groove. known, and in these tires, by providing fin-like projections protruding in the groove width direction on the groove walls of the vertical groove or lateral groove,
A device is known that reduces the audible level by dispersing the frequency of the air column resonance tube formed by vertical or horizontal grooves, while relaxing the speed of airflow due to the pumping action when touching the ground (Utility Model No. 58). -Refer to Publication No. 22301).
しかしながら、上記公知の空気入りタイヤは、
ひれ状突片の突出長が大きく、その先端が縦溝ま
たは横溝の溝中心線以上に長く延びており、かつ
溝底近傍に接する部分においてもその上方部分と
同じように溝中心線以上の突出長に形成されるの
で、湿潤路を走行する際に上記縦溝等の排水性が
妨げられて走行安定性が低下し、また接地の際に
ひれ状突片と溝底との接続部に応力が集中してこ
の接続部に亀裂が発生し、これが生長してタイヤ
寿命を短くするという欠点があつた。 However, the above-mentioned known pneumatic tires
The protruding length of the fin-like protrusion is large, and its tip extends longer than the groove center line of the vertical or horizontal groove, and the part that touches the vicinity of the groove bottom also protrudes beyond the groove center line in the same way as the upper part. Because it is long, when running on a wet road, the drainage of the vertical grooves etc. is hindered, reducing running stability, and when touching the ground, stress is applied to the connection between the fin-shaped protrusion and the groove bottom. The problem was that cracks were generated in the joints due to the concentration of cracks, which grew and shortened the life of the tire.
この考案は、タイヤ円周方向に連続する少なく
とも１本の縦溝を設け、かつこの縦溝のシヨルダ
側に多数本の横溝をその一端がタイヤシヨルダ端
で外側に開口し他端が上記縦溝内または縦溝のシ
ヨルダ側に位置するように設けた空気入りタイヤ
において、その騒音を上記公知の空気入りタイヤ
と同程度に保ちながら、しかも湿潤路の走行安全
性を向上し、かつひれ状突片と溝底との接続部に
亀裂が発生し難く、タイヤ寿命が延長されるよう
にしたものである。 This invention provides at least one longitudinal groove continuous in the circumferential direction of the tire, and a large number of horizontal grooves on the shoulder side of this longitudinal groove, one end of which opens outward at the tire shoulder end, and the other end of which is inside the longitudinal groove. Or, in a pneumatic tire installed so as to be located on the shoulder side of the longitudinal groove, the noise level is maintained at the same level as the above-mentioned known pneumatic tires, and the running safety on wet roads is improved, and the fin-shaped protrusions This makes it difficult for cracks to occur at the connection between the tire and the groove bottom, extending the life of the tire.
すなわち、この考案は、タイヤ円周方向に連続
する少なくとも１本の縦溝を設け、かつこの縦溝
のシヨルダ側に多数本の横溝をその一端がタイヤ
シヨルダ端で外側に開口し他端が上記縦溝内また
は縦溝のシヨルダ側に位置するように設けた空気
入りタイヤにおいて、上記の横溝にその溝壁から
溝幅方向にひれ状突片が突設され、このせき板の
溝底に近接した下部領域の先端が該下部領域を除
く上部領域の先端よりも溝壁側に凹む形状に形成
され、上記上部領域の突出長が溝幅の半分よりも
小さく、厚みが上記突出長よりも小さくそれぞれ
設定されていることを特徴とする低騒音空気入り
タイヤである。 That is, this invention provides at least one longitudinal groove continuous in the circumferential direction of the tire, and a plurality of lateral grooves on the shoulder side of the longitudinal groove, one end of which opens outward at the tire shoulder end, and the other end of which opens outward at the tire shoulder end. In a pneumatic tire that is located within the groove or on the shoulder side of the longitudinal groove, the lateral groove has a fin-like protrusion protruding from the groove wall in the groove width direction, and the fin-like protrusion protrudes from the groove wall in the groove width direction. The tip of the lower region is formed in a shape that is recessed toward the groove wall side than the tip of the upper region other than the lower region, and the protrusion length of the upper region is smaller than half the groove width, and the thickness is smaller than the protrusion length. This is a low-noise pneumatic tire that is characterized by
以下にこの考案の実施例を図面によつて説明す
る。 Examples of this invention will be described below with reference to the drawings.
第１図において、１は空気入りタイヤのトレツ
ド、２はシヨルダ、３は縦溝、４は副溝、Ｎは円
周方向中心線であり、上記の副溝４とタイヤシヨ
ルダ２とにまたがつてタイヤ円周方向中心線Ｎに
対してほぼ横向きの横溝５が設けられ、その一端
がタイヤシヨルダ端の外部に開口し、この横溝５
に１対のひれ状突片６が対向状に突設されてい
る。上記のひれ状突片６は、第２図に示すよう
に、トレツド表面に近い上部領域６ａと、溝底５
ｂに近接した下部領域６ｂとからなり、下部領域
６ｂの先端は、上部領域６ａの先端から溝壁５ａ
側へ半円形に凹んで溝底５ｂに接している。 In FIG. 1, 1 is the tread of the pneumatic tire, 2 is the shoulder, 3 is the vertical groove, 4 is the minor groove, and N is the circumferential center line, which extends between the minor groove 4 and the tire shoulder 2. A lateral groove 5 is provided that is substantially lateral to the tire circumferential center line N, and one end thereof opens to the outside of the tire shoulder end.
A pair of fin-like protrusions 6 are provided in a protruding manner facing each other. As shown in FIG.
b, and the tip of the bottom region 6b is connected from the tip of the upper region 6a to the groove wall 5a.
It is recessed to the side in a semicircular shape and is in contact with the groove bottom 5b.
一般にタイヤが負荷状態で回転すると、トレツ
ド１の各部は１回転ごとに接地をくり返し、上記
の縦溝３や横溝５の溝底５ｂ近傍にはそれぞれ上
記の接地ごとに大きなせん断歪が生じ、また地面
から離れたときには大きな引張り歪が生じ、この
部分に従来のひれ状突片のような突起物が存在す
るときは、この突起部の基部に応力が集中してク
ラツクが発生し易くなるが、上記実施例のひれ状
突片６には、突出長が上部領域６ａよりも短い下
部領域６ｂが設けられているので、上記応力の集
中が軽減され、上記クラツクの発生が減少してタ
イヤ寿命が延長される。そして、上記下部領域６
ｂの存在により、トレツド１が接地し横溝５の溝
幅が縮小してひれ状突片６の上部領域６ａが横溝
５の大半を塞いだときにも溝底５ｂの近傍が閉塞
されることなく開いており、湿潤路走行時の排水
が容易になり、走行安定性が確保される。 Generally, when a tire rotates under load, each part of the tread 1 repeatedly contacts the ground every rotation, and large shear strains occur near the bottoms 5b of the vertical grooves 3 and lateral grooves 5 each time the tires touch the ground. When it leaves the ground, a large tensile strain occurs, and if there is a protrusion like a conventional fin-like protrusion in this part, stress will be concentrated at the base of this protrusion and cracks will easily occur. Since the fin-like protrusion 6 of the above embodiment is provided with the lower region 6b whose protrusion length is shorter than the upper region 6a, the concentration of stress is reduced, the occurrence of cracks is reduced, and the tire life is extended. It will be extended. And the lower region 6
Due to the presence of b, even when the tread 1 is in contact with the ground and the width of the lateral groove 5 is reduced and the upper region 6a of the fin-like protrusion 6 blocks most of the lateral groove 5, the vicinity of the groove bottom 5b is not blocked. It is open, making drainage easier when driving on wet roads and ensuring driving stability.
上記ひれ状突片６の上部領域６ａの突出長は、
横溝５の溝幅の半分よりも小さく設定される。す
なわち、第２図において、溝深さ方向の任意の位
置における上部領域６ａの突出長ｂが、上記の任
意の位置における溝幅Ｂの半分よりも小さく、好
ましくは溝幅Ｂの20〜48％に設定される。上記の
突出長ｂが溝幅Ｂの20％未満では、気柱振動に対
する振動波の節が生じ難く、低騒音化の効果が得
られず、反体に半分以上の場合には、湿潤路走行
の際の排水抵抗が増大し、走行安全性が低下す
る。 The protrusion length of the upper region 6a of the fin-like protrusion 6 is as follows:
It is set smaller than half the groove width of the lateral groove 5. That is, in FIG. 2, the protrusion length b of the upper region 6a at any position in the groove depth direction is smaller than half the groove width B at the above-mentioned arbitrary position, preferably 20 to 48% of the groove width B. is set to If the above-mentioned protrusion length b is less than 20% of the groove width B, nodes of vibration waves due to air column vibration are difficult to occur, and the effect of reducing noise cannot be obtained. Drainage resistance increases and driving safety decreases.
上記横溝５のひれ状突片６の横断面形状は、第
３図に示される厚さ一定の長方形状、第４図に示
される厚さ不均一の台形状等の任意に形状でよい
が、その平均厚さｔは、トレツド１の表面におけ
るひれ状突片６の突出長b0よりも小さく、好まし
くは突出長b0の20〜80％に設定される。上記の平
均厚さｔが突出長b0の20％未満の場合は、ひれ状
突片６の曲げ剛性が低くなり、縦溝３内の気流圧
力に対する抵抗が不足して気柱振動に対する振動
波の節が生じ難くなり、反対に突出長b0以上に場
合は、上記の曲げ剛性が高くなり過ぎ、湿潤路走
行時の排水抵抗が過大になつて走行安定性が低下
すると共に、溝壁３ａとの接続部に応力集中が起
きてクラツクが発生し易くなる。 The cross-sectional shape of the fin-like projections 6 of the lateral grooves 5 may be any shape, such as a rectangular shape with a constant thickness as shown in FIG. 3, or a trapezoidal shape with an uneven thickness as shown in FIG. The average thickness t is smaller than the protrusion length b 0 of the fin-like projections 6 on the surface of the tread 1, and is preferably set to 20 to 80% of the protrusion length b 0 . If the above average thickness t is less than 20% of the protrusion length b0 , the bending rigidity of the fin-like protrusions 6 will be low, and the resistance to the airflow pressure in the vertical grooves 3 will be insufficient, causing vibration waves due to air column vibration. On the other hand, if the protrusion length b is greater than 0 , the bending rigidity described above becomes too high, the drainage resistance becomes excessive when running on a wet road, and running stability decreases, and the groove wall 3a Stress concentration occurs at the connection area and cracks are more likely to occur.
上記の実施例において、ひれ状突片６の個数
は、１個の横溝５につき一対で十分であるが、こ
れに限るものではない。また、一方のひれ状突片
６を他方の対向位置から若干ずらすことができ
る。また、縦溝３の片側または両側の溝壁に同様
のひれ状突片６を突設してもよい。ただし、この
場合のひれ状突片６のピツチは、タイヤが負荷に
よつて路面に圧接されたときの接地長の中に１個
の割合が好ましい。なお、この実施例は、横溝５
の一端がシヨルダ２で外側に開口し、他端が縦溝
３よりも細くて浅い副溝４に開口したものである
が、横溝５の他端が縦溝３に接続されたものでも
よく、また上記副溝４を有しないものでもよいこ
とはもちろんである。 In the embodiments described above, one pair of fin-like projections 6 is sufficient for each horizontal groove 5, but the number is not limited to this. Further, one of the fin-like projections 6 can be slightly shifted from the opposing position of the other. Furthermore, similar fin-like protrusions 6 may be provided protrudingly on one or both sides of the groove wall of the vertical groove 3. However, in this case, the pitch of the fin-like protrusions 6 is preferably one in the ground contact length when the tire is pressed against the road surface under load. In addition, in this embodiment, the horizontal groove 5
One end opens outward at the shoulder 2, and the other end opens into a sub-groove 4 which is narrower and shallower than the vertical groove 3, but the other end of the horizontal groove 5 may be connected to the vertical groove 3. Of course, it is also possible to use one without the above-mentioned sub-groove 4.
以上に説明したようにこの考案は、縦溝および
横溝を有する空気タイヤにおいて、特に大きい騒
音を発生する横溝にひれ状突片を設けると共に、
そのせき板の下部領域の先端を溝壁側に凹む形状
に形成し、かつその突出長と厚みをそれぞれ規定
したものであるから、従来のリブタイヤおよびラ
グタイヤの特性を兼ね備え、横滑り抵抗および牽
引力の双方が大きく、タイヤシヨルダ部の放熱性
が良好であつて、かつ走行時の騒音が低く抑えら
れると共に、湿潤路走行時の排水性が良好であつ
て走行安定性が向上し、かつひれ状突片と溝底と
の接続部に亀裂が発生し難く、タイヤ寿命が延長
される。 As explained above, this invention provides a pneumatic tire with vertical grooves and horizontal grooves, in which fin-like protrusions are provided in the horizontal grooves that generate particularly large noises, and
The tip of the lower area of the weir plate is formed in a shape concave toward the groove wall, and its protrusion length and thickness are defined respectively, so it has both the characteristics of conventional rib tires and lug tires, and has both sideslip resistance and traction force. is large, the heat dissipation of the tire shoulder part is good, noise during running is kept low, drainage is good when running on wet roads, running stability is improved, and fin-shaped protrusions Cracks are less likely to occur at the connection with the groove bottom, extending the life of the tire.
第１図はこの考案の実施例の要部の平面図、第
２図は横溝の断面図、第３図はせき板の横断面
図、第４図は変形例のせき板の横断面図である。
１……トレツド、２……シヨルダ、３……縦
溝、４……副溝、５……横溝、６……ひれ状突
片、６ａ……上部領域、６ｂ……下部領域、Ｎ…
…タイヤ円周方向中心線。
Figure 1 is a plan view of the main parts of an embodiment of this invention, Figure 2 is a cross-sectional view of a horizontal groove, Figure 3 is a cross-sectional view of a weir plate, and Figure 4 is a cross-sectional view of a modified weir plate. be. 1... Tread, 2... Shoulder, 3... Vertical groove, 4... Minor groove, 5... Horizontal groove, 6... Fin-like projection, 6a... Upper region, 6b... Lower region, N...
...Circumferential center line of the tire.
Claims (1)
溝を設け、かつこの縦溝のシヨルダ側に多数本の
横溝をその一端がタイヤシヨルダ端で外側に開口
し他端が上記縦溝内または縦溝のシヨルダ側に位
置するように設けられた空気入りタイヤにおい
て、上記の横溝にその溝壁から溝幅方向にひれ状
突片が突設され、このひれ状突片の溝底に近接し
た下部領域の先端が該下部領域を除く上部領域の
先端よりも溝壁側に凹む形状に形成され、上記上
部領域の突出長が溝幅の半分よりも小さく、厚み
が上記突出長よりも小さくそれぞれ設定されてい
ることを特徴とする低騒音空気入りタイヤ。 At least one longitudinal groove continuous in the circumferential direction of the tire is provided, and on the shoulder side of this longitudinal groove, a number of lateral grooves are provided, one end of which opens outward at the tire shoulder end, and the other end of which is inside or outside the longitudinal groove. In a pneumatic tire provided to be located on the shoulder side, a fin-like protrusion is provided in the above-mentioned lateral groove protruding from the groove wall in the groove width direction, and a lower region of the fin-like protrusion near the groove bottom is provided. The tip is formed in a shape that is recessed toward the groove wall side than the tip of the upper region excluding the lower region, and the protrusion length of the upper region is set to be smaller than half of the groove width, and the thickness is set to be smaller than the protrusion length. A low-noise pneumatic tire that is characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039484U JPS60121905U (en) | 1984-01-27 | 1984-01-27 | low noise pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1039484U JPS60121905U (en) | 1984-01-27 | 1984-01-27 | low noise pneumatic tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60121905U JPS60121905U (en) | 1985-08-17 |
| JPH0425364Y2 true JPH0425364Y2 (en) | 1992-06-17 |
Family
ID=30491536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1039484U Granted JPS60121905U (en) | 1984-01-27 | 1984-01-27 | low noise pneumatic tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60121905U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2982798B1 (en) * | 2011-11-18 | 2014-01-10 | Michelin Soc Tech | ANTI-NOISE RESONANCE NOISE DEVICE FOR TIRES |
| JP6735131B2 (en) * | 2015-07-10 | 2020-08-05 | 株式会社ブリヂストン | tire |
-
1984
- 1984-01-27 JP JP1039484U patent/JPS60121905U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60121905U (en) | 1985-08-17 |
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