JPS6088612A - Radial tire for heavy load - Google Patents
Radial tire for heavy loadInfo
- Publication number
- JPS6088612A JPS6088612A JP58196791A JP19679183A JPS6088612A JP S6088612 A JPS6088612 A JP S6088612A JP 58196791 A JP58196791 A JP 58196791A JP 19679183 A JP19679183 A JP 19679183A JP S6088612 A JPS6088612 A JP S6088612A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing layer
- bead
- layer
- cord
- 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.)
- Granted
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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0603—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the bead filler or apex
- B60C15/0607—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead characterised by features of the bead filler or apex comprising several parts, e.g. made of different rubbers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はビード部の耐久性を改善した重荷重用重用のタ
イヤは、一般に、スチールごl−ドをラジアル方向に配
列したカーカスを有しがっそのスチールコードの両端は
ビードコアのまわりを内側から外側にかけて折返えずと
ともに、その外側の折返し部を囲んでコード補強層を配
置しているが、カーカスの折返し部及びコード補強層Q
月二端部では周囲のゴムの間に剛性の段差が形成される
ことになり、この領域では走行の間、屈曲変形によって
応力集中が生じる結果、コーF ?+Ii強屓あるいは
カーカスの折返し部の上端部fζ1近でゴム剥離が発止
しやすい。DETAILED DESCRIPTION OF THE INVENTION A heavy-duty tire with improved bead durability according to the present invention generally has a carcass in which steel cords are arranged in the radial direction. A cord reinforcing layer is placed around the bead core from the inside to the outside, and a cord reinforcing layer is placed around the outside folded part.
At the second end of the moon, a rigid step is formed between the surrounding rubber, and stress concentration occurs in this region due to bending deformation during running, resulting in CoF? Rubber peeling tends to occur near the +Ii strength or the upper end fζ1 of the folded part of the carcass.
従って、従来からコード補強層の外側又は内側に隣接し
て各種の補強層を配置し剛性の段差を緩和する等の方法
が提案されζいるが、いずれも充分にはこの問題を解決
していない。Therefore, methods have been proposed in the past, such as arranging various types of reinforcing layers adjacent to the outside or inside of the cord reinforcing layer to alleviate the difference in rigidity, but none of these methods has satisfactorily solved this problem. .
本発明は、と−1:部の走行時の変形挙動につぃて、前
記カーカスの折返し部及びコード補強層近傍のゴム材料
の種類及び配置について研究を重ねた結果完成したもの
であり、前記問題点を解決し、耐久性を向上した重荷重
用ラジアルタイヤの提供を目的としている。The present invention was completed as a result of repeated research on the type and arrangement of rubber materials near the folded portion of the carcass and the cord reinforcing layer, with regard to the deformation behavior of the -1 section during running. The aim is to solve problems and provide heavy-duty radial tires with improved durability.
以下本発明の一実施例を図面に基づき説明する。An embodiment of the present invention will be described below based on the drawings.
片側のビード部のみの断面を示す第1図において、重荷
重用ラジアルタイヤ1は、スチニルコード2がラジアル
方向に配列されかつその両端をビードコア3のまわりを
内側から外側に折返されるカーカス4と、コード補強N
5と、ビードエーペックス6と、追加補強層7と、保護
層8とを具え、又本例では、保護M8は3つの保護層部
9.10.11からなる。In FIG. 1, which shows a cross section of only one bead portion, a heavy-duty radial tire 1 includes a carcass 4 in which stinyl cords 2 are arranged in the radial direction and whose ends are folded around a bead core 3 from inside to outside; Reinforcement N
5, a bead apex 6, an additional reinforcing layer 7 and a protective layer 8, and in this example the protection M8 consists of three protective layer parts 9.10.11.
コード補強層5は、カーカス4の折返し部4aの外側に
隣接して配置されるとともに、そのビード部外側の上端
5aは、カーカス4の折返し部4aの上端4bを越える
位置まで延設される。又該コード補強層5のコードは、
カーカスのコード配列方向に対して通常20“〜70゛
の角度で傾斜している。なお折返し部4aの上端4bに
比べてコード補強層5のビード部外側の上端5aを低く
形成することもできる。The cord reinforcing layer 5 is arranged adjacent to the outside of the folded portion 4a of the carcass 4, and its upper end 5a outside the bead portion extends to a position beyond the upper end 4b of the folded portion 4a of the carcass 4. Moreover, the cord of the cord reinforcing layer 5 is
It is normally inclined at an angle of 20" to 70" with respect to the cord arrangement direction of the carcass.The upper end 5a of the cord reinforcing layer 5 on the outside of the bead part can also be formed lower than the upper end 4b of the folded part 4a. .
コード補強層5は、スチールコー1j Ii@、を好適
に用いうるが、その他ナイ1」ン、ポリエステル、レー
ヨン、あるいは1゛香族ポリアミ1′等の有機繊維コー
ドも使用でき、又カーカス4の折返し部4aの補強のた
めには、プ゛′8族ポリアミl′、あるいはレーヨン等
の高弾性率の月質のt)のが好ましい。For the cord reinforcing layer 5, steel cord 1j Ii@ can be suitably used, but other organic fiber cords such as 1'', polyester, rayon, or 1'' aromatic polyamide 1' can also be used. For reinforcing the folded portion 4a, it is preferable to use a polyamide of group VIII or a material having a high elastic modulus such as rayon.
又コード補強層5のビード部外側のle+U5bは、カ
ーカス4の折返し部4aの−1−醋14 b 0)jn
iさを越える位置まで延長され、ビード部外側のカーカ
ス4を補強する。なおかかる構造とするごとにより、折
返し部4aとの間の眉間剪断歪を軽減できる。In addition, le+U5b on the outside of the bead part of the cord reinforcing layer 5 is -1-14b0)jn of the folded part 4a of the carcass 4.
It is extended to a position that exceeds the height and reinforces the carcass 4 on the outside of the bead portion. Furthermore, by adopting such a structure, it is possible to reduce shear strain between the eyebrows and the folded portion 4a.
しかし追加補強層7の」一端7aを越えると、前記ビー
ド部内側の上端5bが新たな応力對1中の起点となるの
で好ましくない。However, if it exceeds one end 7a of the additional reinforcing layer 7, the upper end 5b inside the bead portion becomes the starting point of a new stress 1, which is not preferable.
又追加補強層7は、カーカス4の折返し部4aあるいは
コード補強層5のビーF III夕)側とビードエーペ
ックス6との間に挿置されている。Further, the additional reinforcing layer 7 is inserted between the folded portion 4a of the carcass 4 or the bead apex 6 and the bead apex 6 of the cord reinforcing layer 5.
該追加補強層7は、カーカス4のコード配列方、向に対
して20゛〜70°の角度で配置され、前記コード補強
1’ti95のコードとは相互に反対方向に傾斜する。The additional reinforcing layer 7 is arranged at an angle of 20° to 70° with respect to the direction in which the cords are arranged in the carcass 4, and is inclined in the opposite direction to the cords of the cord reinforcement 1'ti95.
従ってカーカス4の折返し部4aは前記コード補強W4
5と、追加補強層7とではさまれる結果となる。しかも
タイヤ半径方向にほぼ平行に配列された折返し部4aの
コードに対して、コード補強層5及び追加補強M7のコ
ードが20〜70°の角度で交差しているため、タイヤ
周方向及び半径方向の歪を緩和し、眉間剥離を防止する
ことができる。Therefore, the folded portion 4a of the carcass 4 is connected to the cord reinforcement W4.
5 and the additional reinforcing layer 7. Moreover, since the cords of the cord reinforcing layer 5 and the additional reinforcement M7 intersect at an angle of 20 to 70 degrees with respect to the cords of the folded portion 4a arranged substantially parallel to the tire radial direction, It can alleviate the distortion of the eyebrows and prevent peeling between the eyebrows.
なお追加補強層7のコードは、コード補強層5と同じ材
質のものが使用できるが、ナイロン、ポリエステル等の
有機繊維コードで低弾性率のものが好適に使用される。The cord of the additional reinforcing layer 7 can be made of the same material as the cord reinforcing layer 5, but an organic fiber cord such as nylon or polyester with a low elastic modulus is preferably used.
又追加補強層7は、カーカス4の折返し部4aとコード
補強層5の間に挿置することも可能である。Further, the additional reinforcing layer 7 can also be inserted between the folded portion 4a of the carcass 4 and the cord reinforcing layer 5.
前記ビードエーペックス6は、前記カーカス4とその折
返し部4aあるいはコード補強層5とにより囲まれる領
域において、ビードコア3からサイドウオール方向に向
は延設される。又咳ビードエーペックス6は、ビード」
ア3の、L縁がらサイドウオール方向にのびかつタイヤ
内側に配する先細りの高弾性ゴム層6aと、該高弾性ゴ
ムmGaの外側に隣接して配置する低弾性ゴム層6bの
2層体からなる。The bead apex 6 extends from the bead core 3 toward the sidewall in a region surrounded by the carcass 4 and its folded portion 4a or the cord reinforcing layer 5. Also, cough bead apex 6 is bead.”
From A3, a two-layer structure consisting of a tapered high elastic rubber layer 6a that extends from the L edge toward the sidewall and is placed inside the tire, and a low elastic rubber layer 6b that is placed adjacent to the outside of the high elastic rubber mGa. Become.
高弾性ゴム層6aは、複素弾性率1?、が250 kg
f/−以上で、またJI3硬度が75′〜95゜の範囲
のゴムによって形成されるとともに、その上端6alは
少な(ともカーカス4の1)1返し部4aの上端4bあ
るいはコード補強JF45の」二輪5aのいずれか高い
ものよりも上方まで延びζいる。The high elasticity rubber layer 6a has a complex modulus of 1? , is 250 kg
f/- or more, and the JI3 hardness is in the range of 75' to 95°, and the upper end 6al is made of a rubber having a JI3 hardness in the range of 75' to 95°, and the upper end 6al of the carcass 4 is formed by the upper end 4b of the turned part 4a or the cord reinforcement JF45. It extends above whichever of the two wheels 5a is higher.
他方、前記低弾性ゴム層6bは、9M、素弾性率Eが8
0〜200 Kgf /cJの範囲で、また、J I
S硬度50°〜80°の範囲のゴムからなり、少なくと
も前記高弾性ゴム層6aに比して)!(弾性率であり、
又その高さhは、上端6blが、ビー1′底部からトレ
ッド部上面に至るタイヤの断面+111さの20%〜6
0%の範囲、好ましくは30〜40%の範囲に位置しう
るように設定される。On the other hand, the low elasticity rubber layer 6b has an elementary elastic modulus of 9M and an elementary elastic modulus of 8.
In the range of 0 to 200 Kgf/cJ, also J I
(S made of rubber with hardness in the range of 50° to 80°, at least compared to the high elasticity rubber layer 6a)! (The elastic modulus is
The height h is such that the upper end 6bl is 20% to 6% of the tire cross section +111 length from the bottom of the bee 1' to the top surface of the tread part.
It is set so that it can be located in the range of 0%, preferably in the range of 30 to 40%.
前記保護R8は、コード?Ili強層5の内外の上端5
a、5bの部分と、前記追加補強層7とを被覆する保護
層部9.10.11を具えている。Is the protection R8 a code? Upper and outer ends of Ili stratum 5
A protective layer portion 9.10.11 is provided to cover portions a and 5b and the additional reinforcing layer 7.
保m*T¥48は天然ゴム、イソプレンゴム、ブタジ\
エンゴム、スチレンブタジェンゴム等のゴム成分中で接
着処理を施した、ビニロン、レーコン、ポリエステル、
ナイロン、アラミド専有a繊維又はガラス、スチールコ
ード等の無機繊維であって、1デニ一ル以上のものが0
.1〜30頗の長さに切断された短繊維を、ゴム成分1
00部に対して10〜1−00部混合分散し、ヤング率
が°10〜10’kg/cJ程度の範囲の短繊維混入ゴ
ムを用いて形成される。Hom*T¥48 is natural rubber, isoprene rubber, butaji\
Vinylon, Raycon, polyester, adhesive treated in rubber components such as en-rubber, styrene-butadiene rubber, etc.
Inorganic fibers such as nylon, aramid proprietary a fibers, glass, steel cords, etc. with a denier of 1 or more are 0
.. Short fibers cut into lengths of 1 to 30 mm are mixed with rubber component 1.
It is formed by mixing and dispersing 10 to 1-00 parts of rubber to 100 parts, and using short fiber-containing rubber having a Young's modulus of about 10 to 10' kg/cJ.
コード補強層5のビード部外側の上端5aに配置される
保護層部9は、ビード底部近傍からビードエーペックス
6の上端6’bl近傍までのび、比較的薄く、例えば肉
厚が0.41〜10龍の範囲である。また保護層部9の
下端9aから追加補強層7の下端7bまでの距離aは、
該領域での歪を緩和するため、10m程度以上あること
が望ましい。The protective layer portion 9 disposed at the upper end 5a of the outside of the bead portion of the cord reinforcing layer 5 extends from the vicinity of the bead bottom to the vicinity of the upper end 6'bl of the bead apex 6, and is relatively thin, for example, with a wall thickness of 0.41 to 10 mm. This is the range of dragons. Further, the distance a from the lower end 9a of the protective layer portion 9 to the lower end 7b of the additional reinforcing layer 7 is:
In order to alleviate strain in this region, it is desirable that the length be about 10 m or more.
又保護層部10ば、ビードエーペックス6と追加補強層
70間に形成され、追加?ili +1!屑7の上端7
aを被覆でき、又その上端1 ’Oaはビードエーペッ
クスの上端6blとはば一致する。又ぞの下端10bは
コード補強層5の上端5a近傍に位置している。Further, a protective layer portion 10 is formed between the bead apex 6 and the additional reinforcing layer 70, and is an additional reinforcing layer 70. ili +1! Top end 7 of scrap 7
a can be covered, and its upper end 1'Oa coincides with the upper end 6bl of the bead apex. The lower end 10b of the groove is located near the upper end 5a of the cord reinforcing layer 5.
保護層部9.10は一体となゲζコード補強層5の上端
5a及び追加補’j!11JR7のJ[l 7 a t
l))!覆、保護し、これらの部分において生じがI)
な応力集中を分散、緩和する。The protective layer portions 9 and 10 are integrally formed with the upper end 5a of the ζ cord reinforcing layer 5 and the additional supplementary layer 5! 11JR7's J [l 7 a t
l))! I)
Disperses and relieves stress concentration.
また保護層部11は、コード補’1jllF45のビー
ド部内側上端5bを被覆し、そのゴム厚さは0.4〜5
難の範囲で、はぼ均一厚さのシートとじて構成されてい
る。Further, the protective layer portion 11 covers the inner upper end 5b of the bead portion of the cord supplementary '1jllF45, and its rubber thickness is 0.4 to 5.
To the extent possible, it is constructed as a sheet of almost uniform thickness.
なお複素弾性率は、株式会社胃元製作所製の粘弾性スペ
クトロメータを使用し、温度70″Cで初期歪lO%、
周波数1011z、1辰’Ir1s 291i テ@
4 m×長さ30 +u X 2 asの試料片を用い
て測定したものである。The complex modulus of elasticity was measured using a viscoelasticity spectrometer manufactured by Sugamoto Seisakusho Co., Ltd., with an initial strain of 1O% at a temperature of 70"C,
Frequency 1011z, 1 辰'Ir1s 291i Te@
The measurement was performed using a sample piece of 4 m x length 30 + u x 2 as.
然して重1ii重用タイヤ1ば、追加補強層7がカーカ
ス4の内側に設けられ、カーカス4を補強するとともに
、追加補強R7は、その上端7aをビード部の歪の小さ
い部分位置させることができ、剥離の減少に役立つ。又
追加補強N7はカーカス4の」二輪4bをこえ延設され
、上端4bでの歪を分担し、この部分での層間剥離を防
ぐ一方、保護IFJ8は、追加補強層7の上端7a、カ
ーカス4の上端4b又コ一ド補強層5の上端5b部分で
の歪を漸減して剥離を防止できる。However, in the heavy-duty tire 1, an additional reinforcing layer 7 is provided inside the carcass 4 to reinforce the carcass 4, and the upper end 7a of the additional reinforcing layer R7 can be located in a part of the bead where distortion is small, Helps reduce peeling. Further, the additional reinforcement N7 extends beyond the two wheels 4b of the carcass 4 to share the strain at the upper end 4b and prevent delamination in this area, while the protective IFJ8 extends over the upper end 7a of the additional reinforcement layer 7 and the carcass 4. Peeling can be prevented by gradually reducing strain at the upper end 4b or at the upper end 5b portion of the cord reinforcing layer 5.
紙上のごとく本発明の重荷重用ラジアルタイヤは、カー
カスの折返し部にコード?ili強層を配置したビード
構造において、ビードエーペックスを硬軟の2層とし、
かつ追加補強層及び保護層を前記のごとく構成したため
、折返し部あるいはコード?11強層の上端部における
応力集中が緩和され、ゴムとの剥611が効果的に防止
でき、その耐久性を大中に向上させうる。As shown on paper, the heavy-duty radial tire of the present invention has a cord on the folded part of the carcass. In the bead structure with ili strong layer, the bead apex has two hard and soft layers,
And since the additional reinforcing layer and protective layer are configured as described above, the folded part or cord? Stress concentration at the upper end of the No. 11 strong layer is alleviated, and peeling 611 from the rubber can be effectively prevented, and its durability can be greatly improved.
第1図は本為明の一実゛施例を示す、ビード部の断面図
である。
2ニスチールコード、3− ビードコア、4−カーカス
、 4a−折返し部、
5−コード補強IN、
6・−ビードエーペックス、
7−・・追加補強層、 8−保護層、
9.10.11−保護層部。
特許出願人 住友二fムに:’5株j、c会社代理人
弁理士 苗 44 正FIG. 1 is a sectional view of a bead portion showing one embodiment of the present invention. 2 Steel cord, 3- Bead core, 4- Carcass, 4a- Turned part, 5- Cord reinforcement IN, 6-- Bead apex, 7- Additional reinforcement layer, 8- Protective layer, 9.10.11- Protection Layer section. Patent applicant Sumitomo Nifum: '5 shares J, C company agent
Patent Attorney Tadashi Nae 44
Claims (1)
その両端をビートコアのまわりで内側から外側に折返し
たカーカスと、該カーカスのビード部外側に隣接して配
置されるコード補強層と、前記カーカスとその折返し部
あるいはコード補強層とにより囲まれる領域でビードコ
アからサイドウオール方向に延びるビードエーペックス
と、前記折返し部又はコード補強層の上端部を#!復す
る追加補強層と、前記コード補強層のビード部内側及び
外側の雨上端部を被覆するとともに前記ビードエーペッ
クスのビード部外側と追加補強IHの上端部との間にも
挿着される短lll1維混入ゴムからなる保護層とを具
え、かつ前記ビードエーペックスは、タイヤ内側に配す
る先細りの高弾性ゴム層と、高弾性ゴムの外側に隣接し
て配置した低弾性ゴム層との2Iw体からなることを特
徴とする711荷重用ラジアルタイヤ。(1) A carcass in which steel cords are arranged in the radial direction and both ends of which are folded around a bead core from the inside to the outside; a cord reinforcing layer disposed adjacent to the outside of the bead portion of the carcass; A bead apex extending from the bead core in the sidewall direction in a region surrounded by the folded part or the cord reinforcing layer and the upper end of the folded part or the cord reinforcing layer. a short lll1 which covers the inner and outer upper ends of the bead of the cord reinforcing layer and is also inserted between the outer side of the bead of the bead apex and the upper end of the additional reinforcement IH; and a protective layer made of fiber-containing rubber, and the bead apex is made of a 2Iw body consisting of a tapered high-elasticity rubber layer arranged inside the tire and a low-elasticity rubber layer arranged adjacent to the outside of the high-elasticity rubber. A 711 load radial tire characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19679183A JPH0617082B2 (en) | 1983-10-19 | 1983-10-19 | Radial tires for heavy loads |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19679183A JPH0617082B2 (en) | 1983-10-19 | 1983-10-19 | Radial tires for heavy loads |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6088612A true JPS6088612A (en) | 1985-05-18 |
JPH0617082B2 JPH0617082B2 (en) | 1994-03-09 |
Family
ID=16363702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19679183A Expired - Lifetime JPH0617082B2 (en) | 1983-10-19 | 1983-10-19 | Radial tires for heavy loads |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0617082B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6092905A (en) * | 1983-10-27 | 1985-05-24 | Sumitomo Rubber Ind Ltd | Radial tire for heavy load |
JPS61275010A (en) * | 1985-05-29 | 1986-12-05 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire for heavy-load use |
JP2002178724A (en) * | 2000-12-18 | 2002-06-26 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
JP2007161067A (en) * | 2005-12-13 | 2007-06-28 | Sumitomo Rubber Ind Ltd | Run flat tire |
EP2058146A1 (en) * | 2007-11-07 | 2009-05-13 | The Goodyear Tire & Rubber Company | Pneumatic tire |
CN102616091A (en) * | 2011-01-26 | 2012-08-01 | 东洋橡胶工业株式会社 | Pneumatic radial tire |
CN107627790A (en) * | 2017-10-16 | 2018-01-26 | 中策橡胶集团有限公司 | A kind of all-steel radial tyre for intersecting built-in steel wire reinforcement tyre bead |
-
1983
- 1983-10-19 JP JP19679183A patent/JPH0617082B2/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6092905A (en) * | 1983-10-27 | 1985-05-24 | Sumitomo Rubber Ind Ltd | Radial tire for heavy load |
JPS61275010A (en) * | 1985-05-29 | 1986-12-05 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire for heavy-load use |
JP2002178724A (en) * | 2000-12-18 | 2002-06-26 | Sumitomo Rubber Ind Ltd | Tire for heavy load |
JP2007161067A (en) * | 2005-12-13 | 2007-06-28 | Sumitomo Rubber Ind Ltd | Run flat tire |
JP4653651B2 (en) * | 2005-12-13 | 2011-03-16 | 住友ゴム工業株式会社 | Run flat tire |
EP2058146A1 (en) * | 2007-11-07 | 2009-05-13 | The Goodyear Tire & Rubber Company | Pneumatic tire |
US8695666B2 (en) | 2007-11-07 | 2014-04-15 | The Goodyear Tire & Rubber Company | Pneumatic tire |
CN102616091A (en) * | 2011-01-26 | 2012-08-01 | 东洋橡胶工业株式会社 | Pneumatic radial tire |
JP2012153265A (en) * | 2011-01-26 | 2012-08-16 | Toyo Tire & Rubber Co Ltd | Pneumatic radial tire |
US8701729B2 (en) | 2011-01-26 | 2014-04-22 | Toyo Tire & Rubber Co., Ltd. | Pneumatic radial tire |
CN107627790A (en) * | 2017-10-16 | 2018-01-26 | 中策橡胶集团有限公司 | A kind of all-steel radial tyre for intersecting built-in steel wire reinforcement tyre bead |
CN107627790B (en) * | 2017-10-16 | 2023-08-18 | 中策橡胶集团股份有限公司 | All-steel radial tire with crossed built-in steel wire reinforced tire bead |
Also Published As
Publication number | Publication date |
---|---|
JPH0617082B2 (en) | 1994-03-09 |
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