JPH04103403A - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JPH04103403A JPH04103403A JP2221045A JP22104590A JPH04103403A JP H04103403 A JPH04103403 A JP H04103403A JP 2221045 A JP2221045 A JP 2221045A JP 22104590 A JP22104590 A JP 22104590A JP H04103403 A JPH04103403 A JP H04103403A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- tire
- outside
- belt
- carcass
- 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.)
- Pending
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 239000011324 bead Substances 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、タイヤ剛性および操縦安定性を実質的に低下
させることなく高速耐久性を向上させかつ軽量化した空
気入りラジアルタイヤ、特に乗用車用空気入りラジアル
タイヤに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a pneumatic radial tire that has improved high-speed durability and reduced weight without substantially reducing tire rigidity and handling stability, particularly for use in passenger cars. Regarding pneumatic radial tires.
従来、ラジアルタイヤの高速耐久性を高めるために、第
４図に示すように、トレッド部４においてベルト層５の
最外層の外側に、ベルトカバー層６を配置している。こ
のベルトカバー層６は、高速走行時にベルト層５の端部
が遠心力により径方向にセリだしてその端部でセバレー
ジョンが生ずるのをタガ効果によって防止すると共に、
ベルト層５と相俟ってタイヤ周方向の剛性を高める機能
を備えている。Conventionally, in order to improve the high-speed durability of radial tires, a belt cover layer 6 has been disposed outside the outermost layer of the belt layer 5 in the tread portion 4, as shown in FIG. This belt cover layer 6 uses a hoop effect to prevent the ends of the belt layer 5 from warping in the radial direction due to centrifugal force during high-speed running, and from causing separation at the ends.
Together with the belt layer 5, it has the function of increasing the rigidity in the tire circumferential direction.
しかしながら、第４図に示すタイヤ１では、カーカス層
を２層設け、そのうち内側のカーカス層３の端部をビー
ドコア２の周りにタイヤ内側から外側に折り返して巻き
上げると共に、その巻き上げ部３ａを外側のカーカス層
８によって押さえるようにしているために、ベルト層５
の内側にも２層のカーカス層３および８が存在すること
になるので、その分だけ重量が大となるという問題があ
った。However, in the tire 1 shown in FIG. 4, two carcass layers are provided, and the end of the inner carcass layer 3 is folded back and rolled up around the bead core 2 from the inside of the tire to the outside, and the rolled-up portion 3a is rolled up on the outside. Since it is pressed by the carcass layer 8, the belt layer 5
Since there are two carcass layers 3 and 8 on the inside of the carcass, there is a problem that the weight increases accordingly.
そこで、軽量化を図るために、タイヤのゴムゲージを薄
くしたり、補強材料の幅や数量などを削減したりすると
、耐久性の悪化を招いたり、剛性の低下に起因する操縦
安定性の悪化を招くなどの不具合が生じてしまう。Therefore, in order to reduce the weight, thinning the rubber gauge of the tire or reducing the width and quantity of reinforcing materials may lead to deterioration of durability and deterioration of handling stability due to a decrease in rigidity. Inconveniences such as invitations may occur.
本発明は上述した事情にかんがみなされたものであって
、タイヤ剛性および操縦安定性を維持しつつ高速耐久性
を向上させかつ軽量化した空気入りラジアルタイヤを提
供することを目的とする。The present invention was conceived in view of the above-mentioned circumstances, and an object of the present invention is to provide a pneumatic radial tire that maintains tire rigidity and handling stability, improves high-speed durability, and is lightweight.
本発明は、ビードコアの周りにカーカス層の端部をタイ
ヤ内側から外側に折り返して巻き上げると共に、トレッ
ド部におけるカーカス層の外側にベルト層を配設した空
気入りラジアルタイヤにおいて、前記カーカス層の巻き
上げ部の端部を前記ベルト層の端部の外側まで延長させ
、さらに、この巻き上げ部の端部の少なくとも外側に、
タイヤ周方向に対するコード角度が実質的にＯ″である
ベルトカバー層を配設して該巻き上げ部の端部を被覆し
たことを特徴とする。The present invention provides a pneumatic radial tire in which an end portion of a carcass layer is folded back and rolled up from the inside of the tire to the outside around a bead core, and a belt layer is arranged on the outside of the carcass layer in a tread portion. extends to the outside of the end of the belt layer, and further, at least outside the end of the rolled-up part,
The present invention is characterized in that a belt cover layer having a cord angle of substantially O'' with respect to the circumferential direction of the tire is provided to cover the end of the winding portion.
このように本発明では、カーカス層の巻き上げ部の端部
をベルト層の端部の外側まで延長させたために、サイド
部が複層になって補強されるので横剛性が高まり操縦安
定性が向上する。In this way, in the present invention, the end of the winding part of the carcass layer is extended to the outside of the end of the belt layer, so the side part is multi-layered and reinforced, increasing lateral rigidity and improving steering stability. do.
また、ベルト層の内側では、カーカス層が１層となるの
で第４図に示されるタイヤに比して軽量化を図ることが
できる。さらに、ビード部においては、第４図に示され
るタイヤのようにはカーカス層の端部同士の重なり部分
が生じないので、ビード部のゴムゲージ（厚さ）が減る
ためいっそう軽量となる。そのうえ、カーカス層の巻き
上げ部の端部の少なくとも外側をベルトカバー層で覆っ
たために、カーカス層の巻き上げ部の端部の動きが抑え
られるので、その端部でのセパレーションの発生を防止
することができる。Moreover, since there is only one carcass layer inside the belt layer, the tire can be made lighter than the tire shown in FIG. 4. Further, in the bead portion, unlike the tire shown in FIG. 4, there is no overlap between the ends of the carcass layers, so the rubber gauge (thickness) of the bead portion is reduced, resulting in further weight reduction. Furthermore, since at least the outside of the end of the rolled-up portion of the carcass layer is covered with the belt cover layer, the movement of the end of the rolled-up portion of the carcass layer is suppressed, thereby preventing the occurrence of separation at that end. can.
また、本発明は、ビードコアの周りにカーカス層の端部
をタイヤ内側から外側に折り返してビード部域内に巻き
上げると共に、トレッド部におけるカーカス層の外側に
ベルト層を配設した空気入りラジアルタイヤにおいて、
前記カーカス層の巻き上げ部の外側から前記ベルト層の
端部の外側に亘って補強層を配置し、さらに、該補強層
のベルト層側の端部の少なくとも外側にタイヤ周方向に
対するコード角度が実質的にθ°であるベルトカバー層
を配置して該補強層のベルト層側の端部を被覆したこと
を特徴とする。The present invention also provides a pneumatic radial tire in which the end portion of the carcass layer is folded back from the inside of the tire to the outside around the bead core and rolled up into the bead region, and a belt layer is provided on the outside of the carcass layer in the tread portion.
A reinforcing layer is disposed from the outside of the rolled-up portion of the carcass layer to the outside of the end of the belt layer, and further, at least outside the end of the reinforcing layer on the belt layer side, the cord angle with respect to the tire circumferential direction is substantially The present invention is characterized in that a belt cover layer having an angle of θ° is arranged to cover the end of the reinforcing layer on the belt layer side.
このように本発明では、カーカス層の巻き上げ部の外側
からベルト層の端部の外側に亘って補強層を配置したた
めに、サイド部が複層になって補強されるので横剛性が
高まり操縦安定性が向上する。また、サイド部だけに補
強層を配置したので第４図に示されるタイヤに比して軽
量化を図ることができる。さらに、補強層とカーカス層
とが別個に独立しているため、カーカス層の材料に関係
なく補強層の材質やコード角度を任意に変更することが
でき、これによりタイヤ特性を必要に応じて自由に設定
することが可能となる。そのうえ、補強層のベルト層側
の端部の少なくとも外側をベルトカバー層で覆ったため
に、その端部でのセパレーションの発生を防止すること
ができる。In this way, in the present invention, since the reinforcing layer is arranged from the outside of the rolled up part of the carcass layer to the outside of the end of the belt layer, the side part is reinforced with multiple layers, increasing lateral rigidity and improving steering stability. Improves sex. Furthermore, since the reinforcing layer is provided only on the side portions, the tire can be made lighter than the tire shown in FIG. 4. Furthermore, since the reinforcing layer and carcass layer are separate and independent, the material of the reinforcing layer and the cord angle can be changed arbitrarily regardless of the material of the carcass layer, which allows freedom in adjusting tire characteristics as needed. It is possible to set it to . Furthermore, since at least the outside of the end of the reinforcing layer on the belt layer side is covered with the belt cover layer, it is possible to prevent separation from occurring at the end.
以下、図を参照して上記手段につき詳しく説明する。Hereinafter, the above means will be explained in detail with reference to the drawings.
（１）第１図は本発明の空気入りラジアルタイヤの一例
の子午線方向断面説明図である。第１図において、タイ
ヤ１では、ビードコア２の廻りにカーカス層３の端部が
タイヤ内側から外側に折り返されて巻き上げられ、巻き
上げ部３ａを形成している。この巻き上げ部３ａの端部
３ｂは、ベルト層５の端部の外側まで延長し、ベルト層
５の端末５ａを覆っている。端部３ｂの端末５ａを覆う
範囲、すなわち端部３Ｃから端末５ａまでの幅方向長さ
Ａは、１５ ｍｍ以上であるのが好ましい（Ａ≧１５
ｎｖ ）。巻き上げ部３ａの端部３ｂの外側には、タイ
ヤ周方向に対するコード角度が実質的にＯ″′であるベ
ルトカバー層６が一方のショルダ一部から他方のショル
ダ一部に亘って配置され（フルカバー）、巻き上げ部３
ａの端部３ｂを被覆している。なお、ベルトカバー層６
は、第２図に示すように、ショルダ一部だけに配置され
ていてもよいくエツジカバー）。(1) FIG. 1 is an explanatory cross-sectional view in the meridian direction of an example of the pneumatic radial tire of the present invention. In FIG. 1, in a tire 1, an end portion of a carcass layer 3 is folded back and rolled up from the inside of the tire to the outside around a bead core 2 to form a rolled up portion 3a. The end 3b of the rolled-up portion 3a extends to the outside of the end of the belt layer 5, and covers the end 5a of the belt layer 5. It is preferable that the range of the end portion 3b covering the terminal 5a, that is, the length A in the width direction from the end portion 3C to the terminal 5a, is 15 mm or more (A≧15
nv). On the outside of the end 3b of the winding portion 3a, a belt cover layer 6 having a cord angle of substantially O'' with respect to the tire circumferential direction is disposed extending from a part of one shoulder to a part of the other shoulder (full belt cover layer 6). cover), winding section 3
The end portion 3b of a is covered. Note that the belt cover layer 6
As shown in FIG. 2, the edge cover may be placed only on a portion of the shoulder.
ベルトカバー層６の端末６ａは、ベルト層５の端末５ａ
よりも幅方向外側に位置している。The terminal 6a of the belt cover layer 6 is the terminal 5a of the belt layer 5.
It is located on the outside in the width direction.
ベルト層５の端末５ａでの動きを抑えて端末５ａでのセ
パレーションの発生を防止するためである。端末５ａか
ら端末６ａまでの幅方向長さＢは、５〜１５ＩＩｌ１１
１であるのが好ましい（Ｂ＝５〜１５Ｉ１１−）。This is to suppress the movement of the belt layer 5 at the end 5a to prevent separation at the end 5a. The width direction length B from the terminal 5a to the terminal 6a is 5 to 15IIl11
1 (B=5-15I11-).
（２）また、本発明では、第３図に示すタイヤ構造の場
合であってもよい。(2) Furthermore, in the present invention, the tire structure shown in FIG. 3 may be used.
第３図は本発明の空気入りラジアルタイヤの側倒の子午
線方向断面説明図である。この第３図において、タイヤ
１では、ビードコア２の周りにカーカス層３の端部がタ
イヤ内側から外側に折り返されてビード部１０の域内で
巻き上げられ、巻き上げ部３ａを形成している。FIG. 3 is an explanatory cross-sectional view of the pneumatic radial tire of the present invention in the meridian direction when the pneumatic radial tire is turned on its side. In FIG. 3, in the tire 1, the end portion of the carcass layer 3 is folded back from the inside of the tire to the outside around the bead core 2 and rolled up within the area of the bead portion 10 to form a rolled up portion 3a.
トレッド部４では、カーカス層３の外側に２層のベルト
層５．５が配設されている。カーカス層３の巻き上げ部
３ａの外側からベルト層５の端部の外側に亘って補強Ｎ
７が配置されている。この補強層７の材質としては、カ
ーカス層３と同一であっても異なっていてもよい。ここ
で、補強層７のビードコア２例の端部７ａがカーカス層
３の巻き上げ部３ａの端部と重合する範囲（ラップ量）
ｔは、５ｍｍ以上がよい。In the tread portion 4, two belt layers 5.5 are disposed outside the carcass layer 3. Reinforcement N extends from the outside of the rolled up portion 3a of the carcass layer 3 to the outside of the end of the belt layer 5.
7 is placed. The material of this reinforcing layer 7 may be the same as or different from that of the carcass layer 3. Here, the range (wrap amount) in which the end portions 7a of the two examples of bead cores of the reinforcing layer 7 overlap with the end portions of the rolled up portion 3a of the carcass layer 3
t is preferably 5 mm or more.
補強層７のベルト層側端部の外側には、タイヤ周方向に
対するコード角度が実質的にＯ″であるベルトカバー層
６が一方のショルダ一部から他方のショルダ一部に亘っ
て配置され、補強層７のベルト層側端部を被覆している
。なお、ベルトカバー層６は、第２図に示すと同様に、
ショルダ一部だけに配置されていてもよい。On the outside of the belt layer side end of the reinforcing layer 7, a belt cover layer 6 having a cord angle of substantially O'' with respect to the tire circumferential direction is arranged extending from a part of one shoulder to a part of the other shoulder, The belt layer side end portion of the reinforcing layer 7 is covered.The belt cover layer 6 is similar to that shown in FIG.
It may be placed only on a part of the shoulder.
補強層７の端部７Ｃからベルト層５の端末５ａまでの幅
方向長さＡは、第１図および第２図におけると同様に、
１５ｗ１ｌｌ１以上であるのが好ましい（Ａ≧１５ ｓ
ｎ＋ ）。また、ベルト層５の端末５ａからベルトカバ
ー層６の端末６ａまでの幅方向長さＢは、第１図および
第２図におけると同様に、５〜１５ ｍｍであるのが好
ましい（Ｂ＝５〜１５ ａｍ ）。The widthwise length A from the end 7C of the reinforcing layer 7 to the end 5a of the belt layer 5 is as in FIGS. 1 and 2,
It is preferable that it is 15w1ll1 or more (A≧15 s
n+). Further, the length B in the width direction from the end 5a of the belt layer 5 to the end 6a of the belt cover layer 6 is preferably 5 to 15 mm (B=5 ~15 am).
このように補強層７をカーカス層３とは独立した層とし
て配置するため、必要に応じてその材質や補強層７を構
成するコードのタイヤ周方向に対する配置角度等を変更
することによりタイヤ特性を容易に変更できるから、要
求性能に応じて対応し得る自由度が増加する。また、タ
イヤ製造に際してはカーカス層３とは独立に切り離され
た状態で補強層７を取り扱えるので、作業性が向上する
。Since the reinforcing layer 7 is arranged as a layer independent of the carcass layer 3 in this way, the tire characteristics can be improved by changing the material of the reinforcing layer 7 and the arrangement angle of the cords constituting the reinforcing layer 7 with respect to the circumferential direction of the tire. Since it can be easily changed, there is an increased degree of freedom in responding to required performance. Furthermore, during tire manufacture, the reinforcing layer 7 can be handled in a state that is separated from the carcass layer 3, which improves work efficiency.
以下に実施例を示す。Examples are shown below.
実施例
下記の本発明タイヤニ、従来タイヤＩ、比較タイヤ（ｌ
、■）につきそれぞれ重量を測定した。ついで、これら
のタイヤをそれぞれサイズ１４ Ｘ ５Ｊのリムに装着
し、空気を充填して空気圧２、Ｏｋｇｆ／−として、横
剛性、縦剛性、開削性、操縦安定性、耐久性、および高
速耐久性を評価した。これらの結果を第１表に示す。Examples The following tires according to the present invention, conventional tires I, and comparative tires (l
, ■) were weighed. Next, each of these tires was mounted on a rim of size 14 x 5J and filled with air to an air pressure of 2 and Okgf/-, and the lateral stiffness, longitudinal stiffness, cut-cutting performance, steering stability, durability, and high-speed durability were determined. was evaluated. These results are shown in Table 1.
■本発明タイヤニ。■Taiani of the present invention.
・タイヤサイズ１７５／６０ Ｒ１４゜第１図に示すタ
イヤ構造。- Tire size 175/60 R14° Tire structure shown in Figure 1.
・カーカス層；ポリエステルコード１層。・Carcass layer: 1 layer of polyester cord.
・ベルト層；スチールコード２Ｎ。・Belt layer: Steel cord 2N.
・ベルトカバー層；ナイロンコードフルカバ・長さＡ＝
３０１０長さＢ＝１０Ｉ。・Belt cover layer; Nylon cord full cover ・Length A=
3010 length B=10I.
■従来タイヤ■。■Conventional tires■.
・タイヤサイズ１７５／６０ Ｒ１４゜第４図に示すタ
イヤ構造。- Tire size 175/60 R14° Tire structure shown in Figure 4.
・カーカス層；ポリエステルコード２層。・Carcass layer: 2 layers of polyester cord.
・へ）Ｌｉトカハー層；ナイロンコードフルカバ・タイ
ヤ幅方向において９、ベル）１端末とベルトカバー層端
末との長さの差異がないことを除いて本発明タイヤＩと
同じ。・F) Li cover layer; nylon cord full cover 9 in the tire width direction, Bell) Same as the tire I of the present invention except that there is no difference in length between the 1 end and the end of the belt cover layer.
（本頁以下余白）
・タイヤ幅方向において、ベルト層端末とベルトカバー
層端末との長さの差異なし。(Margins below this page) - There is no difference in length between the end of the belt layer and the end of the belt cover layer in the tire width direction.
■比較タイヤニ。■Comparison Tiani.
・タイヤサイズ１７５／６０ Ｒ１４゜第５図に示すタ
イヤ構造。- Tire size 175/60 R14° Tire structure shown in Figure 5.
・カーカス層３の巻き上げ部３ａの端部３ｂがベルトカ
バー層６の端部を覆っていることを除いて本発明タイヤ
Ｉと同じ。- Same as the tire I of the present invention except that the end 3b of the rolled-up portion 3a of the carcass layer 3 covers the end of the belt cover layer 6.
■比較タイヤニ。■Comparison Tiani.
・タイヤサイズ１７５／６０ Ｆｉ↓４゜第６図に示す
タイヤ構造。- Tire size 175/60 Fi↓4° Tire structure shown in Figure 6.
第１表
開削性二上記同様にタイヤを固定し、タイヤ軸まわりに
回転トルクを加え、バネ定数
を算出した。Table 1 Cutting Properties 2 The tire was fixed in the same manner as above, rotational torque was applied around the tire axis, and the spring constant was calculated.
操縦安定性： １３００ｃｃの乗用車に装着し、操縦安
定性について官能評価を行い、その時
のフィーリング評点で表す。Steering Stability: Mounted on a 1300cc passenger car, sensory evaluation of steering stability was performed and expressed as a feeling rating.
耐久性： ＪＩＳ Ｄ４２３０に準拠。Durability: Compliant with JIS D4230.
高速耐久性： ＪＩＳ Ｄ４２３０に準拠。High-speed durability: Compliant with JIS D4230.
ここで、評価方法は、次の通りであった。Here, the evaluation method was as follows.
横剛性：タイヤトレッド部を環状に連なるセグメントで
押さえ固定し、タイヤの軸方
向へ荷重を加え、その時のたわみ量を
用いてバネ定数を算出した。Lateral rigidity: The tire tread was held and fixed by annular segments, a load was applied in the axial direction of the tire, and the spring constant was calculated using the amount of deflection at that time.
縦閘性二上記同様にタイヤを固定し、タイヤの径方向へ
荷重を加え、バネ定数を算出
した。Vertical lock property 2 The tire was fixed in the same manner as above, a load was applied in the radial direction of the tire, and the spring constant was calculated.
第１表から、本発明タイヤは高速耐久性が向上し、且つ
、軽量化したにもかかわらず、タイヤ謝性（開削性、横
剛性、縦閘性）および操縦安定性が従来タイヤに比して
変わることなく維持されることが判る。Table 1 shows that although the tire of the present invention has improved high-speed durability and is lighter in weight, its performance (cutting performance, lateral rigidity, longitudinal locking performance) and handling stability are lower than that of conventional tires. It can be seen that it will be maintained without any change.
以上説明したように本発明によれば、カーカス層の巻き
上げ部の端部をベルト層の端部の外側まで延長させ、こ
の巻き上げ端部のすくなくとも外側にベルトカバー層を
配設するか、又はカーカス層の巻き上げ端部の外側から
ベルト層の端部の外側に亘って補強層を配置し、この補
強層のベルト層側の端部の少なくとも外側にベルトカバ
ー層を配置して巻き上げ端部を被覆したために、下記の
効果を奏することができる。As explained above, according to the present invention, the end of the rolled-up portion of the carcass layer is extended to the outside of the end of the belt layer, and the belt cover layer is disposed at least on the outside of this rolled-up end, or the carcass layer is A reinforcing layer is arranged from the outside of the rolled-up end of the layer to the outside of the end of the belt layer, and a belt cover layer is arranged at least outside the end of the reinforcing layer on the belt layer side to cover the rolled-up end. As a result, the following effects can be achieved.
（１１タイヤの高速耐久性を向上させることができる。(11) The high-speed durability of tires can be improved.
（２） タイヤの軽量化を図ることができる。(2) It is possible to reduce the weight of the tire.
（３）タイヤの剛性（横剛性、縦剛性、開開性）および
操縦安定性を維持することができる。(3) Tire rigidity (lateral rigidity, longitudinal rigidity, opening ability) and steering stability can be maintained.
第１図乃至第３図はそれぞれ本発明の空気入りラジアル
タイヤの一例の子午線方向断面説明図、第４図は従来の
空気入りラジアルタイヤの一例の子午線方向半断面説明
図、第５図と第６図は比較タイヤの一例の子午線方向半
断面説明図である。
１・・・タイヤ、２・・・ビードコア、３・・・カーカ
ス層、３ａ・・・巻き上げ部、３ｂ・・・端部、４・・
・トレッド部、５・・・ベルト層、５ａ・・・端末、６
・・・ベルトカバー層、
・・・端末、
７・・・補強層。1 to 3 are explanatory meridional cross-sectional views of an example of the pneumatic radial tire of the present invention, FIG. 4 is an explanatory half-sectional view of an example of a conventional pneumatic radial tire in the meridian direction, and FIGS. FIG. 6 is an explanatory half-sectional view in the meridian direction of an example of a comparative tire. DESCRIPTION OF SYMBOLS 1... Tire, 2... Bead core, 3... Carcass layer, 3a... Winding part, 3b... End part, 4...
- Tread portion, 5... Belt layer, 5a... Terminal, 6
... Belt cover layer, ... Terminal, 7... Reinforcement layer.
Claims (1)
から外側に折り返して巻き上げると共に、トレッド部に
おけるカーカス層の外側にベルト層を配設した空気入り
ラジアルタイヤにおいて、前記カーカス層の巻き上げ部
の端部を前記ベルト層の端部の外側まで延長させ、さら
に、この巻き上げ部の端部の少なくとも外側に、タイヤ
周方向に対するコード角度が実質的に０゜であるベルト
カバー層を配設して該巻き上げ部の端部を被覆した空気
入りラジアルタイヤ。 ２、ビードコアの周りにカーカス層の端部をタイヤ内側
から外側に折り返してビード部域内に巻き上げると共に
、トレッド部におけるカーカス層の外側にベルト層を配
設した空気入りラジアルタイヤにおいて、前記カーカス
層の巻き上げ部の外側から前記ベルト層の端部の外側に
亘って補強層を配置し、さらに、該補強層のベルト層側
の端部の少なくとも外側にタイヤ周方向に対するコード
角度が実質的に０゜であるベルトカバー層を配置して該
補強層のベルト層側の端部を被覆した空気入りラジアル
タイヤ。[Scope of Claims] 1. A pneumatic radial tire in which the end of the carcass layer is folded back and rolled up from the inside of the tire to the outside around the bead core, and a belt layer is provided on the outside of the carcass layer in the tread portion, wherein the carcass A belt cover layer having an end of the rolled-up portion of the layer extending to the outside of the end of the belt layer, and further having a cord angle of substantially 0° with respect to the tire circumferential direction at least outside the end of the rolled-up portion. A pneumatic radial tire in which an end portion of the rolled-up portion is covered with a. 2. In a pneumatic radial tire in which the end of the carcass layer is folded back from the inside of the tire to the outside around the bead core and rolled up into the bead area, and a belt layer is arranged on the outside of the carcass layer in the tread part, the carcass layer A reinforcing layer is arranged from the outside of the winding part to the outside of the end of the belt layer, and further, the cord angle with respect to the tire circumferential direction is substantially 0° at least outside the end of the reinforcing layer on the belt layer side. A pneumatic radial tire comprising a belt cover layer arranged to cover an end of the reinforcing layer on the belt layer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221045A JPH04103403A (en) | 1990-08-24 | 1990-08-24 | Pneumatic radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221045A JPH04103403A (en) | 1990-08-24 | 1990-08-24 | Pneumatic radial tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04103403A true JPH04103403A (en) | 1992-04-06 |
Family
ID=16760628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2221045A Pending JPH04103403A (en) | 1990-08-24 | 1990-08-24 | Pneumatic radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04103403A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007161242A (en) * | 2005-12-15 | 2007-06-28 | Goodyear Tire & Rubber Co:The | Tire with improved high speed performance and manufacturing method thereof |
| JP2007283962A (en) * | 2006-04-19 | 2007-11-01 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US20110308688A1 (en) * | 2007-12-18 | 2011-12-22 | Michelin Recherche Et Technique S.A. | Light Tire Comprising a Non-Radial Carcass Structure |
| KR20200041421A (en) * | 2018-10-11 | 2020-04-22 | 금호타이어 주식회사 | Runflat tire |
-
1990
- 1990-08-24 JP JP2221045A patent/JPH04103403A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007161242A (en) * | 2005-12-15 | 2007-06-28 | Goodyear Tire & Rubber Co:The | Tire with improved high speed performance and manufacturing method thereof |
| JP2007283962A (en) * | 2006-04-19 | 2007-11-01 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US20110308688A1 (en) * | 2007-12-18 | 2011-12-22 | Michelin Recherche Et Technique S.A. | Light Tire Comprising a Non-Radial Carcass Structure |
| US9156318B2 (en) * | 2007-12-18 | 2015-10-13 | Michelin Recherche Et Technique S.A. | Light tire comprising a non-radial carcass structure |
| KR20200041421A (en) * | 2018-10-11 | 2020-04-22 | 금호타이어 주식회사 | Runflat tire |
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