JPS5844004Y2 - Pneumatic radial tires for passenger cars with a comfortable ride - Google Patents
Pneumatic radial tires for passenger cars with a comfortable rideInfo
- Publication number
- JPS5844004Y2 JPS5844004Y2 JP1979176201U JP17620179U JPS5844004Y2 JP S5844004 Y2 JPS5844004 Y2 JP S5844004Y2 JP 1979176201 U JP1979176201 U JP 1979176201U JP 17620179 U JP17620179 U JP 17620179U JP S5844004 Y2 JPS5844004 Y2 JP S5844004Y2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- tread
- rubber
- carcass
- passenger cars
- 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
Landscapes
- Tires In General (AREA)
Description
【考案の詳細な説明】
この発明は乗心地に優れた乗用車用ラジアルタイヤに関
するものである。[Detailed Description of the Invention] The present invention relates to a radial tire for passenger cars that provides excellent ride comfort.
一般にラジアルタイヤはスチールコードのような弾性率
が高いコードを補強材としてベルト層に使用したもので
、耐摩耗性およびコーナリングなどの緒特性の面で通常
のバイアスタイヤに対してはるかに優れているか、乗心
地が甚だしく劣るところが使用上の難点である。In general, radial tires use cords with high elastic modulus, such as steel cords, as reinforcement materials in the belt layer, and are far superior to regular bias tires in terms of wear resistance and cornering characteristics. However, the difficulty in use is that the riding comfort is extremely poor.
この理由は、タイヤの赤道面と平行か捷たは極く浅い角
度で交差するコード配列にした耐張コードよりなる複数
プライをベルトとしてタイヤのクラウン部内に埋設しで
あるため、トレッドの厚さ方向曲げ剛性が著しく高く、
路面転動中、路上の突起物を乗り越す際にトレッドが変
形し難く、ここに生じる当り即ち衝撃がサイドウオール
で吸収されない11、タイヤのビード部からリムホイー
ル、車軸へと伝達されて振動の原因となり、また一方で
タイヤのトレッドには小さい凹凸の周方向分布に加わっ
て多少の偏心もさけられないので、平坦な路面上でもタ
イヤの回転毎の周期的な衝撃の振動の形で発生し、これ
またサイドウオールで完全に吸収されずに車軸へ伝わる
ことになるからである。The reason for this is that multiple plies of tension-resistant cords arranged parallel to the tire's equatorial plane, twisted, or intersecting at a very shallow angle are buried in the crown of the tire as a belt, which reduces the thickness of the tread. Extremely high directional bending rigidity,
During rolling on the road, the tread is difficult to deform when passing over protrusions on the road, and the impact that occurs here is not absorbed by the sidewall11, and is transmitted from the tire bead to the rim wheel and axle, causing vibration. On the other hand, in addition to the circumferential distribution of small irregularities on the tire tread, some eccentricity cannot be avoided, so even on a flat road surface, vibrations occur in the form of periodic shocks every time the tire rotates. Again, this is because it is not completely absorbed by the sidewalls and is transmitted to the axle.
元来空気入りタイヤの基本特性である耐摩耗性、コーナ
リング特性卦よび乗心地特性は後者が前二者に対し相克
関係にあり、従来ラジアル構造のタイヤでは乗心地特性
はやむを得ないものとして、せいぜいタイヤ製造検査の
際にユニフオミテイ不整の程度によって選別し、必要に
応じ削除修正を施すことが乗心地向上のための主たる対
策とされたに過ぎない。Originally, the basic characteristics of pneumatic tires, such as wear resistance, cornering characteristics, and ride comfort characteristics, are in a conflicting relationship with the former two, and in conventional tires with radial structure, ride comfort characteristics are considered unavoidable, and at best, The main measure to improve ride comfort was simply to sort tires according to the degree of uniformity irregularity during tire manufacturing inspections, and to delete or correct tires as necessary.
この考案は上記のように著るしく高い剛性を有するトレ
ッド部に加わる衝撃に基く振動をサイドウオールで有効
に吸収、減衰せしめることによりラジアルタイヤの乗心
地を有利に改善したものである。This invention advantageously improves the riding comfort of radial tires by effectively absorbing and attenuating vibrations caused by impacts applied to the tread portion, which has extremely high rigidity, using the sidewalls.
即ちこの考案は、円筒状トレッド部と、トレッド部の両
端から径方向内向きに延び先端位置でビード部を形成す
る一対のサイドウオールとをそなえ、上記ビード部間に
わたりラジアルカーカスで補強したタイヤにおいて、上
記サイドウオールのビード部とトレッド部とに挾壕れた
フレックスゾーンには、カーカスの外側に密着して、レ
ジリエンスが20φ〜50多の範囲にあるゴム層を配置
したことを特徴とする乗心地のよい乗用車用空気入りラ
ジアルタイヤである。That is, this invention provides a tire that includes a cylindrical tread portion and a pair of sidewalls that extend radially inward from both ends of the tread portion and form a bead portion at the tip, and is reinforced with a radial carcass between the bead portions. , a rubber layer having a resilience in the range of 20φ to 50mm is disposed in the flex zone between the bead portion and the tread portion of the sidewall in close contact with the outside of the carcass. A comfortable pneumatic radial tire for passenger cars.
以下図面にもとづき説明する。This will be explained below based on the drawings.
図はこの考案につきタイヤの左半分を示す横断面図であ
る。The figure is a cross-sectional view showing the left half of the tire according to this invention.
図においてタイヤ1は、その中央部に円筒状トレッド2
、トレッド端からサイドウオール3と連らなり、トレッ
ド2に近接しショルダーS1そして、径方向内側にビー
ド部4を形成する。In the figure, a tire 1 has a cylindrical tread 2 at its center.
, continues from the tread end to the sidewall 3, forms a shoulder S1 close to the tread 2, and a bead portion 4 on the radially inner side.
タイヤ1は赤道面0−OK関し左右対象であることは勿
論である。Of course, the tire 1 is symmetrical with respect to the equatorial plane 0-OK.
タイヤの上記各郡全体はポリエステル等で知られる繊維
コードを赤道面0−0とほぼ直交する方向、即ちラジア
ル方向に配列したゴム引きプライから成るカーカス5で
補強しその両端部はビードワイヤ6のまわりをタイヤの
外側に向って巻き上げ、折返し5′を設けである。Each of the above groups of tires is reinforced with a carcass 5 consisting of a fiber cord known as polyester or the like and rubberized plies arranged in a direction substantially perpendicular to the equatorial plane 0-0, that is, in the radial direction. is rolled up toward the outside of the tire, and a folded back 5' is provided.
図には、カーカス5は1プライとし、その折返し端をタ
イヤの断面高さHのほぼ中央位置1で延長し且つ、ビー
ドワイヤ6上から折返し5′の先端に至るコード層に囲
まれた先細りのスペースを埋めるようにして特別硬いゴ
ムフィラーIを設はビード部4を強化した例を示す。In the figure, the carcass 5 has one ply, and its folded end extends at approximately the center position 1 of the cross-sectional height H of the tire, and the carcass 5 has a tapered shape surrounded by a cord layer extending from above the bead wire 6 to the tip of the folded layer 5'. An example is shown in which a special hard rubber filler I is provided to fill the space to strengthen the bead portion 4.
カーカス上トレッド位置は常法によりその幅−ばいに、
金属等の非伸張性コードを赤道面0−0に対し100〜
25°と小さい角度で配列した層の複数を、層間で異方
向に交差するよう重ね合せたベルト層で強化する。The tread position on the carcass is determined by the conventional method according to its width.
Non-stretchable cord such as metal is 100~
It is reinforced with a belt layer in which multiple layers are arranged at a small angle of 25 degrees and stacked one on top of the other so that the layers intersect in different directions.
このようにして成るコード補強層の周囲は、外被ゴム9
で被覆する。The periphery of the cord reinforcing layer formed in this way is covered with outer rubber 9
Cover with
外被ゴム9は、図に示すように走行時、路面と接する部
分に耐摩耗性、耐スキツド性に富むトレッドゴム9−1
、またサイドウオールには通常柔軟性に富みレジリエン
スが高いサイドゴム9−2及び耐摩耗性に優れる硬度の
ゴムチェーファ−9−3のように、性質が個別に夫々異
るゴム層より成るものとされる。As shown in the figure, the outer covering rubber 9 has a tread rubber 9-1 which has high wear resistance and skid resistance in the part that comes into contact with the road surface during running.
In addition, the sidewall is usually made of rubber layers with different properties, such as Side Rubber 9-2, which is highly flexible and has high resilience, and Rubber Chafer 9-3, which is hard and has excellent abrasion resistance. .
さて、この考案に成るタイヤはビード部に剛性強化を目
的として埋設したゴムフィラー7の上端部とショルダー
Sに挾まれたサイドウオールのフレックスゾーンFKで
、トくニレジリエンスが20%〜50%と通常タイヤに
使用されるゴム質に比べて著るしくレジリエンスが低い
ゴム層10を図示例でシート状としてカーカスの外側に
密着し、外被ゴムの内側に埋設させる。Now, the tire according to this invention has a flex zone FK of the sidewall sandwiched between the upper end of the rubber filler 7 buried in the bead part for the purpose of strengthening rigidity and the shoulder S, and the resilience is 20% to 50%. In the illustrated example, a rubber layer 10, which has significantly lower resilience than the rubber material normally used for tires, is formed into a sheet and is closely attached to the outside of the carcass and embedded inside the outer cover rubber.
考案者らの実験ではゴム層10の半径方向に測った幅W
は、タイヤ高さHの少くとも30優においてとくに顕著
な効果を得た。In the inventors' experiments, the width W measured in the radial direction of the rubber layer 10
A particularly remarkable effect was obtained when the tire height H was at least 30 mm.
図示の例はベルト層8に近いショルダーSの位置からビ
ードワイヤ6の近傍に至るサイドウオールの大部分にわ
たりその配置幅Wはタイヤ高さHの65%にしである。In the illustrated example, the arrangement width W is 65% of the tire height H over most of the sidewall from the position of the shoulder S near the belt layer 8 to the vicinity of the bead wire 6.
このゴム層10の上部はトレッドゴム9−1とカーカス
5間にまた、下方部はゴムフィラーIとカーカス5間に
夫々挾持している。The upper part of this rubber layer 10 is sandwiched between the tread rubber 9-1 and the carcass 5, and the lower part is sandwiched between the rubber filler I and the carcass 5.
このゴム層10は、図のようにサイドゴム9−2をゴム
層10の好1しくは0.2〜3.0m+++の薄ゲージ
の厚み分だけ薄くして、それらの合計厚みにつき在来の
サイドゴムの全厚みに一致させた場合を例示したがサイ
ドゴム9−2の全体につき、上記のごとき低レジリエン
スゴムによって置き換えしてもよい。This rubber layer 10 is made by thinning the side rubber 9-2 by the thickness of the rubber layer 10, preferably a thin gauge of 0.2 to 3.0 m +++, as shown in the figure, and the total thickness of the side rubber 9-2 is reduced by the thickness of the conventional side rubber. Although the entire thickness of the side rubber 9-2 has been shown as an example, the entire side rubber 9-2 may be replaced with a low resilience rubber such as the one described above.
また図示の例のようにゴム層10を比較的薄いシート状
としサイドゴム9−2の内側へ埋設する場合に、同ゴム
層10の下方部は、ゴムフィラーTとカーカス折返し5
′間または、カーカス折返し5′とサイドゴム9−2間
に挾持させることも可能である。Further, when the rubber layer 10 is formed into a relatively thin sheet and is buried inside the side rubber 9-2 as in the illustrated example, the lower part of the rubber layer 10 is formed of a rubber filler T and a carcass fold 5.
' or between the carcass fold 5' and the side rubber 9-2.
さらにカーカス5の全体にわたってシート状のゴム層1
0を被覆して適用することもまた可能である。Further, a sheet-like rubber layer 1 is formed over the entire carcass 5.
It is also possible to apply a coating of 0.
テスト結果(軸力変動測定) 1.タイヤ種 サイズ: 165S、R13(共通) 注: タイヤB−Dはサイ ドゴムとゴム層10のトータルゲージ( 1,0+ 1.5 )は従来品に同じ。Test results (axial force fluctuation measurement) 1. Tire type size: 165S, R13 (common) note: Tire B-D is the size Total gauge of rubber layer and rubber layer 10 ( 1.0+1.5) is the same as the conventional product.
2、テスト方法
(1)リム: 43AJ
(2)内圧及び荷重:JIS正規
(3)ドラム:直径2rIrIn表面平滑、周上1箇所
に高さ9.5rran断面台形の突起を固定
(4)ドラムに荷重を加え、その状態でタイヤ軸を固定
。2. Test method (1) Rim: 43AJ (2) Internal pressure and load: JIS standard (3) Drum: Diameter 2rIrIn surface smooth, a protrusion with a trapezoidal cross section with a height of 9.5rran fixed at one location on the circumference (4) On the drum Add a load and fix the tire shaft in that state.
走行により突起を乗り越すときタイヤ軸に加わる軸力を
記録しその変動(波形の最大振幅)を測定。When driving over a bump, the axial force applied to the tire shaft is recorded and its fluctuation (maximum amplitude of the waveform) is measured.
3゜
測定結果
註)数値の大きい方が良い
註
低速域−30,35,40,45,50Km/h時に得
たデータの平均
高速域−60,70,80,90,1100K/h時に
得たデータの平均
上表では上下方向は低速域で、前後方向は高速域におい
て顕著に改善されている。3゜Measurement results Note) Larger numbers are better Note: Average of data obtained at low speed range - 30, 35, 40, 45, 50 Km/h High speed range - obtained at 60, 70, 80, 90, 1100 Km/h The data averages shown in the table above show that the vertical direction is significantly improved in the low speed range, and the longitudinal direction is significantly improved in the high speed range.
(優B≧C〉D>A劣)
数値は掲げていないが、軸力の減衰時間も本考案のダイ
ヤは著るしく短かくなり改善される。(Excellent B≧C>D>A poor) Although numerical values are not listed, the diamond of the present invention also significantly shortens and improves the decay time of the axial force.
第1図はこの考案の実施例を示すタイヤ断面図。
2・・・・・・トレッド、3・・・・・・サイドウオー
ル、5・・・・・・カーカス、10・・・・・・ゴム層
、F・・・・・・フレックスゾーン。FIG. 1 is a sectional view of a tire showing an embodiment of this invention. 2... Tread, 3... Sidewall, 5... Carcass, 10... Rubber layer, F... Flex zone.
Claims (1)
きに延び先端位置でビード部を形成する一対のサイドウ
オールとをそなえ、上記ビード部間にわたりラジアルカ
ーカスで補強したタイヤにおいて、 上記サイドウオールのビード部とトレッド部とに挾1れ
た少くともフレックスゾーンには、カーカスの外側に密
着して、レジリエンスが20〜50%の範囲にあるゴム
層を配置したことを特徴とする乗心地のよい乗用車用空
気入りラジアルタイヤ。[Claims for Utility Model Registration] A tread comprising a cylindrical tread portion and a pair of sidewalls extending radially inward from both ends of the tread portion and forming a bead portion at the tip, and reinforced with a radial carcass between the bead portions. In the tire, a rubber layer having a resilience in the range of 20 to 50% is disposed in close contact with the outside of the carcass at least in the flex zone sandwiched between the bead and tread of the sidewall. A pneumatic radial tire for passenger cars with a comfortable ride.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979176201U JPS5844004Y2 (en) | 1979-12-21 | 1979-12-21 | Pneumatic radial tires for passenger cars with a comfortable ride |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979176201U JPS5844004Y2 (en) | 1979-12-21 | 1979-12-21 | Pneumatic radial tires for passenger cars with a comfortable ride |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5693308U JPS5693308U (en) | 1981-07-24 |
JPS5844004Y2 true JPS5844004Y2 (en) | 1983-10-05 |
Family
ID=29686844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1979176201U Expired JPS5844004Y2 (en) | 1979-12-21 | 1979-12-21 | Pneumatic radial tires for passenger cars with a comfortable ride |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5844004Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07266814A (en) * | 1994-03-31 | 1995-10-17 | Bridgestone Corp | Pneumatic tire |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5266202A (en) * | 1975-11-29 | 1977-06-01 | Bridgestone Corp | Pneumatic radial tire for preferably attenuating vibration |
JPS53138106A (en) * | 1976-10-02 | 1978-12-02 | Toyo Tire & Rubber Co Ltd | Pneumatic safety tire |
-
1979
- 1979-12-21 JP JP1979176201U patent/JPS5844004Y2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5266202A (en) * | 1975-11-29 | 1977-06-01 | Bridgestone Corp | Pneumatic radial tire for preferably attenuating vibration |
JPS53138106A (en) * | 1976-10-02 | 1978-12-02 | Toyo Tire & Rubber Co Ltd | Pneumatic safety tire |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07266814A (en) * | 1994-03-31 | 1995-10-17 | Bridgestone Corp | Pneumatic tire |
Also Published As
Publication number | Publication date |
---|---|
JPS5693308U (en) | 1981-07-24 |
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