JPS59157391A - Metal cord for reinforcing rubber - Google Patents
Metal cord for reinforcing rubberInfo
- Publication number
- JPS59157391A JPS59157391A JP3094483A JP3094483A JPS59157391A JP S59157391 A JPS59157391 A JP S59157391A JP 3094483 A JP3094483 A JP 3094483A JP 3094483 A JP3094483 A JP 3094483A JP S59157391 A JPS59157391 A JP S59157391A
- Authority
- JP
- Japan
- Prior art keywords
- cord
- metal
- metal cord
- cross
- diameter
- 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
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0606—Reinforcing cords for rubber or plastic articles
- D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2022—Strands coreless
Landscapes
- Ropes Or Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は耐腐食性及び耐疲労性を改善したゴム補強用
金属コードに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal cord for reinforcing rubber with improved corrosion resistance and fatigue resistance.
例えばスチールラジアルタイヤのベルト層には、その補
強コードとして、複数の金属製素線を撚り合せた金属コ
ートが用いられている。For example, a metal coat made of a plurality of metal wires twisted together is used as a reinforcing cord in the belt layer of a steel radial tire.
ところが従来の金属コードは第１図（ａｌ （ｂ）に示
すように、その断面中央部にゴムが流入しない空胴Ｓが
みられる。However, as shown in FIG. 1 (al(b)), a conventional metal cord has a cavity S in the center of its cross section into which rubber does not flow.
この空胴Ｓは、コードを成形した時の素線の相互接触に
よるもので、コードのまわりにゴムを配置し、タイヤ内
に埋設しても、前記空胴の中へはゴムが流入できな。This cavity S is caused by the mutual contact of the strands when the cord is molded, and even if rubber is placed around the cord and buried in the tire, the rubber cannot flow into the cavity. .
従って、スチールラジアルタイヤが釘や先の鋭利な石に
より前記金属コードまで達する若しくは貫通ずる外傷を
受けた場合、その外傷口からｆ受入する水分が金属コー
ドの中心部まで伝わって行き、これを構成する金属素線
を腐食させさらにコードとゴムとのセパレーションを引
き起してしまう欠点があった。Therefore, if a steel radial tire is damaged by a nail or a sharp stone that reaches or penetrates the metal cord, the moisture received from the trauma hole will travel to the center of the metal cord, forming a This has the disadvantage that it corrodes the metal strands and causes separation between the cord and the rubber.
この発明は上述した問題点を解消すべく検討の結果、導
かれたものである。This invention was developed as a result of studies to solve the above-mentioned problems.
従って、この発明の目的は、金属コードをゴム中に埋設
した時、ゴムが金属コードの内部まで容易に侵入し得る
よう工夫することにより、金属コードを構成する各素線
の耐腐食性及び耐疲労性を向上し得る優れたゴム補強用
金属コードを提供することにある。Therefore, an object of the present invention is to improve the corrosion resistance and resistance of each wire composing the metal cord by devising a method that allows the rubber to easily penetrate into the inside of the metal cord when the metal cord is embedded in rubber. An object of the present invention is to provide an excellent rubber reinforcing metal cord capable of improving fatigue resistance.
即ちこの発明は、複数の金属製素線を撚合せ、その断面
形状がコードの長さ方向に下記関係式を満足して変化す
るように構成すると共に、こ゛の断面形状の最小径ＤＯ
に対する最大径Ｄｍの比ｄを１．１〜２．３としたこと
を特徴とするゴム補強用金属コード。That is, in this invention, a plurality of metal wires are twisted together so that the cross-sectional shape thereof changes in the length direction of the cord while satisfying the following relational expression, and the minimum diameter DO of the cross-sectional shape is
A metal cord for rubber reinforcement, characterized in that the ratio d of the maximum diameter Dm to the maximum diameter Dm is 1.1 to 2.3.
一ド中心を通る径。The diameter passing through the center of one card.
Ｄｏ ；金属ごｒ−ドの最小径。Do: Minimum diameter of metal.
ｄ；金属コードの最小径Ｄｏに対する 最大径Ｄｍの比Ｄｍ／Ｄｏ。d; relative to the minimum diameter Do of the metal cord Ratio Dm/Do of maximum diameter Dm.
β；金属コードの長さ方向の距離。β: Distance in the length direction of the metal cord.
Ｐ、素線の撚りピンチ。P, Twisting pinch of bare wire.
ｋ；金属コード断面の回転周期を変化させる係数。k: Coefficient that changes the rotation period of the metal cord cross section.
θ；コード断面の、コード中心線を含むある面の角度。θ: Angle of a certain plane of the cord cross section that includes the cord center line.
をその要旨とするものである。Its gist is as follows.
以下この発明を実施例により図面を参照して詳細に説明
する。Hereinafter, the present invention will be explained in detail by way of examples with reference to the drawings.
第２図〜第３図はこの発明の実施例よりなるゴム補強用
金属コードを示し、第２図（ａｌは一部切欠した説明図
、第２図（ｂｌは同上コード中心位置に対して９０°回
転した位置における説明図、第３図（ａ）は第２図（ａ
ｌのＡ−Ａ矢視拡大断面図、第３図（ｂｌは第２図（ａ
ｌのＢ−Ｂ矢視拡大断面図、第３図ｆｃ）は第２図（ａ
ｌのＣ−Ｃ矢視拡大断面図、である。2 and 3 show a rubber reinforcing metal cord according to an embodiment of the present invention. An explanatory diagram in the rotated position, Figure 3 (a) is similar to Figure 2 (a)
An enlarged sectional view taken along the line A-A of l, Fig. 3 (bl is Fig. 2 (a)
The enlarged sectional view taken along the line B-B of l, Fig. 3 fc) is the same as Fig. 2 (a
FIG. 1 is an enlarged cross-sectional view taken along the line C-C of FIG.
図に於て、Ｅはこの発明の実施例よりなるゴム補強用金
属コードであって、複数の金属製素線１を１然合せ、そ
の断面形状がコードの長さ方向に下記関係式すなわち
一ド中心を通る径。In the figure, E denotes a rubber reinforcing metal cord according to an embodiment of the present invention, in which a plurality of metal strands 1 are combined into one, and its cross-sectional shape is expressed by the following relational expression in the length direction of the cord. The diameter passing through the center of the circle.
Ｄｏ ；金属コードの最小径。Do: Minimum diameter of metal cord.
ｄ；金属コードの最小径ＤＯに対する 最大径Ｄｍの比Ｄ ｍ ／ Ｄ ｏ 。d; relative to the minimum diameter DO of the metal cord Ratio of maximum diameter Dm Dm/Do.
ｌ；金属コードの長さ方向の距離。l: Distance in the length direction of the metal cord.
Ｐ；素線の１然りピンチ。P; Pinch of one strand of wire.
ｋ；金属コ一”下断面の回転周期を変〜化させる係数。k: Coefficient that changes the rotation period of the lower cross section of the metal core.
θ；ｈ−ド断面の、コード中心線を含むある面の角度。θ: Angle of a certain plane including the cord center line of the h-cord cross section.
を満足して変化するように形成すると共に、この断面形
状の最小径Ｄｏに対いする最大径Ｄｍの比を１．１〜２
．３になるように構成しである。The ratio of the maximum diameter Dm to the minimum diameter Do of this cross-sectional shape is 1.1 to 2.
．． It is configured so that it becomes 3.
さらにこの構造を説明すると、この実施例において金属
コードＥを構成する金属製の素線数は図示のように５本
であるが、これはその用途によって適当な本数用いれば
よい。To further explain this structure, in this embodiment, the number of metal wires constituting the metal cord E is five as shown in the figure, but an appropriate number may be used depending on the application.
この実施例においては、乗用車用スチールラジアルタイ
ヤに用いるベルト層の補強コードを例としているので、
前記素線数は４本〜５本とするのがよい。In this example, a reinforcing cord for a belt layer used in a steel radial tire for a passenger car is used as an example.
The number of strands is preferably 4 to 5.
また素線１の径は、０．０５〜０．５鮪の範囲とするの
が好ましい。これは素線径が０．０５ｍｍ未満では、素
線の加工特にその引き出し加工が困難となりコストアン
プとなる一方、素線の強度も不十分となるからであり、
０．５１■を超えると耐屈曲疲労性が低下するからであ
る。Further, the diameter of the wire 1 is preferably in the range of 0.05 to 0.5 mm. This is because if the diameter of the wire is less than 0.05 mm, processing the wire, especially drawing it out, becomes difficult, increasing costs, and the strength of the wire becomes insufficient.
This is because if it exceeds 0.51■, the bending fatigue resistance will decrease.
またこの発明における金属コードＥの、最小径Ｄｏに対
する最大径Ｄｍの比ｄを１．１〜２．３の範囲としであ
る。これは、比ｄの値が１．１未渦の場合、素線同士が
過度に接哲するため、このゴム補強用金属コーＦＥを用
いたヘルドｌ’５をタイヤ成型工程において加硫した際
に、ゴムが各素線間に流入し難くなり、実質的にこの発
明の目的を達成できなくり、２．３を超えると、素線の
間隔が大きなって金属コードの成形が困難になって、コ
ード成形後における断面形状の均一性にばらつきが多く
なり、実用上好ましくないからである。Further, the ratio d of the maximum diameter Dm to the minimum diameter Do of the metal cord E in this invention is set in the range of 1.1 to 2.3. This is because when the value of the ratio d is 1.1, the wires contact each other excessively, so when the heald l'5 using this rubber reinforcing metal core FE is vulcanized in the tire molding process. If it exceeds 2.3, it becomes difficult for the rubber to flow between the individual wires, making it virtually impossible to achieve the object of the present invention, and if it exceeds 2.3, the distance between the wires becomes large, making it difficult to form a metal cord. This is because the uniformity of the cross-sectional shape after cord molding increases, which is undesirable from a practical standpoint.
さらに上述した関係式において、素線の撚りピッチＰは
、４〜２０鶴の範囲とするのが望ましい。ピッチＰの値
が４ ａｍ未満の場合は、金属コード加工時において生
産性が低くなってコストアンプとなり、２０璽墓を超え
ると金属コードの可撓性が低下し、金属コードの特性特
に耐疲労性が著しく低下しまうので好ましくないからで
ある。Furthermore, in the above-mentioned relational expression, it is desirable that the twist pitch P of the strands is in the range of 4 to 20 twists. If the value of the pitch P is less than 4 am, the productivity during metal cord processing will be low and the cost will increase, and if it exceeds 20 mm, the flexibility of the metal cord will decrease and the characteristics of the metal cord, especially its fatigue resistance, will decrease. This is because it is not preferable because the properties are significantly reduced.
なおｋはＯでない任意の値である。Note that k is any value other than O.
またこの発明において、金属コードＥの断面形状はコー
ドの長さ方向に上述した関係式を満足して変化するよう
に構成したから、長さ方向に伸度が一定で、あらゆる断
面で各素線相互の隙間が均一に存在する。従って、例え
ばこの金属コードＥを補強コードとして用いたベルト層
をタイヤ成型に際し加硫すると、各素線間にゴムが十分
に流入し、従来のように金属コードの中心部に空洞がで
きることがなく、耐腐食性と耐疲労性を向上することが
でき、さらにこの金属コードＥは長さ方向に伸びにくい
ので、ヘルド層としての機能を十分に発揮することがで
きる。In addition, in this invention, since the cross-sectional shape of the metal cord E is configured to change in the length direction of the cord while satisfying the above-mentioned relational expression, the elongation is constant in the length direction, and each strand Mutual gaps are uniform. Therefore, for example, when a belt layer using this metal cord E as a reinforcing cord is vulcanized during tire molding, rubber will flow sufficiently between each strand, and a cavity will not be formed in the center of the metal cord as in the conventional case. , corrosion resistance and fatigue resistance can be improved, and since this metal cord E is difficult to stretch in the length direction, it can fully exhibit its function as a heald layer.
またこの発明は、前述した係数にの値を選定することに
より、第４図に示すように一部の素線を接触せしめるこ
とができ、この金属コードを平行に並べてゴム引きする
際の作業性を向−ヒすることができる。In addition, this invention makes it possible to bring some of the wires into contact as shown in FIG. 4 by selecting the values of the coefficients described above, thereby improving the workability when arranging the metal cords in parallel and rubberizing them. can be directed.
次に実験例によりこの発明の詳細な説明する。Next, the present invention will be explained in detail using experimental examples.
この実験に用いたこの実施例金属コードは、素線数５本
、素線径０．２２＋ｎ、素線の撚りピッチＰ９．５ｍ＋
＋、比ｄ １．３７、金属コードの最小径り。This example metal cord used in this experiment had 5 strands, a strand diameter of 0.22+n, and a twist pitch of 9.5m+.
+, ratio d 1.37, minimum diameter of metal cord.
０．５鶴、係数ｋ１．２５とした、金属コードを平行に
１０本並べた後、幅２５ｃｍのゴムのシートを上下から
鋏み、熱板で押して加硫した。しかる後、このゴムシー
トに包まれた金属コードの両端をそれぞれ０．５ｃｍ切
断すると共に、幅３ ｃｍづつに切断して、１０本の金
属コードを列設した幅３印、長さ２４ｃｍの試料を７本
用意し、これら各試料の、切断側の一端を１．５ｃｍ水
没させ、２４時間後における錆の発生状況を観察した。After arranging 10 metal cords in parallel with a 0.5 crane and a coefficient k of 1.25, a 25 cm wide rubber sheet was pinched from above and below, and the cord was vulcanized by pressing with a hot plate. After that, both ends of the metal cord wrapped in the rubber sheet were cut by 0.5 cm, and each was cut into 3 cm width pieces to form a sample with a width of 3 marks and a length of 24 cm, in which 10 metal cords were arranged in a row. Seven specimens were prepared, and one cut end of each of these specimens was submerged in water for 1.5 cm, and the state of rust formation was observed after 24 hours.
またこれと同時に、第１図（ａ）に示す断面構造を有す
る従来の金属コードを、上述したように加工し、上述し
たと同様に水没せしめた。At the same time, a conventional metal cord having the cross-sectional structure shown in FIG. 1(a) was processed as described above and submerged in water in the same manner as described above.
そして実験終了後観察したところ、従来の金属コードは
、７０本の金属コード全てコード中心部の空洞を毛細管
現象により水分が侵入して、内部に全数績が発生してい
た。しかしこの発明の実施例よりなる金属コードには、
端部すなわち切断面に錆が発生しただけで、内部にわ７
０本全数錆の発生はなかった。Upon observation after the experiment was completed, it was found that all 70 conventional metal cords had moisture entering the cavity in the center of the cord due to capillary action, and all of the cords had leaked inside. However, the metal cord according to the embodiment of this invention has
Rust only occurs on the edges, that is, the cut surface, and there is no damage to the inside.
No rust occurred in all 0 pieces.
さらに、金属コードの断面形状が略円形で、各素線の一
部が互いに接触している金属コードについても、上述し
たと同じ実験を行なったところ、この金属コード７０本
中、４１本に内部まで錆が発生し、この内、錆長さが５
１１１までのものが２５本、その他は錆が１０鰭にわた
って発生していた。Furthermore, when we conducted the same experiment as described above for a metal cord with a substantially circular cross-sectional shape and a portion of each strand touching each other, we found that 41 out of 70 metal cords had internal Rust occurs up to 5 times, and the rust length is 5.
There were 25 fins up to 111, and the rest had rust covering 10 fins.
この発明は、上述したように構成したから、金属コード
の断面形状を均一化することができて、あらゆる断面で
各素線相互の隙間を均一化することができると共に、長
さ方向の伸びを一定化せしめることができる。従って、
例えばこの金属コードを補強コードとして用いたベルト
層をタイヤ成型に際し加硫すると、各素線間にゴムが十
分に流入し、従来のように金属コードの中心部に空洞が
できることがなく、耐腐食性と耐疲労性を向上すること
ができ、タイヤの耐久性を著しく向上させることができ
る。Since this invention is constructed as described above, the cross-sectional shape of the metal cord can be made uniform, the gaps between each strand can be made uniform in all cross-sections, and the elongation in the length direction can be made uniform. It can be made constant. Therefore,
For example, when a belt layer using this metal cord as a reinforcing cord is vulcanized during tire molding, rubber flows sufficiently between each strand, eliminating the formation of a cavity in the center of the metal cord as in the past, and preventing corrosion. It is possible to improve the tire durability and fatigue resistance, and the durability of the tire can be significantly improved.
さらにこの金属コードは長さ方向の伸度を一定化できる
ので、生産性を向上することができる。Furthermore, since the elongation of this metal cord in the length direction can be made constant, productivity can be improved.
第１図ｆａｌ （ｂ）はそれぞれ従来の金属コードの断
面説明図、第２図〜第３図はこの発明の実施例よりなる
ゴム補強用金属コードを示し、第２図（ａｌは一部切欠
した説明図、第２図（ｂ）は同上コード中心位置に対し
て９０°回転した位置における説明図、第３図（ａ）は
第２図（ａｌのＡ−Ａ矢視拡大断面図、第３図（ｂ）は
第２図（１１＋のＢ−Ｂ矢視拡大断面図、第３図（Ｃ１
は第２図（ａｌのＣ−Ｃ矢視拡大断面図、第４図は他の
実施例の断面図である。
■・・・素線。
代理人 弁理士 小用信−
弁理士 野口賢照
弁理士 斎下和彦Fig. 1 fal (b) is a cross-sectional explanatory diagram of a conventional metal cord, Figs. 2 and 3 show a rubber reinforcing metal cord according to an embodiment of the present invention, and Fig. FIG. 2(b) is an explanatory view at a position rotated by 90 degrees with respect to the center position of the same cord, and FIG. Figure 3 (b) is an enlarged sectional view taken along the arrow B-B of Figure 2 (11+) and Figure 3 (C1
Figure 2 is an enlarged cross-sectional view taken along the line C-C of al, and Figure 4 is a cross-sectional view of another embodiment. Patent Attorney Kazuhiko Saishita
Claims (1)
さ方向に下記関係式を満足して変化するように構成する
と共に、この断面形状の最小径Ｄｏに対する最大径Ｄｍ
の比ｄを１．１〜２゜３としたことを特徴とするゴム補
強用金属コード。 一ド中心を通る径。 Ｄｏ ；金属コードの最小径。 ｄ；金属コードの最小径Ｄｏに対する 最大径Ｄｍの比Ｄｍ／Ｄｏ。 ｌ；金属コードの長さ方向の距離。 Ｐ；素線の撚りピッチ。 ｋ；金属コード断面の回転周期を変化させる係数。 θ；コード断面の、コード中心線を含むある面の角度。[Claims] A plurality of metal wires are twisted together, and the cross-sectional shape thereof changes in the length direction of the cord while satisfying the following relational expression, and the maximum diameter of the cross-sectional shape with respect to the minimum diameter Do is Diameter Dm
A metal cord for reinforcing rubber, characterized in that the ratio d is 1.1 to 2°3. The diameter passing through the center of one card. Do: Minimum diameter of metal cord. d; Ratio Dm/Do of the maximum diameter Dm to the minimum diameter Do of the metal cord. l: Distance in the length direction of the metal cord. P: Twisting pitch of strands. k: Coefficient that changes the rotation period of the metal cord cross section. θ: Angle of a certain plane of the cord cross section that includes the cord center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3094483A JPS59157391A (en) | 1983-02-28 | 1983-02-28 | Metal cord for reinforcing rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3094483A JPS59157391A (en) | 1983-02-28 | 1983-02-28 | Metal cord for reinforcing rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59157391A true JPS59157391A (en) | 1984-09-06 |
Family
ID=12317782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3094483A Pending JPS59157391A (en) | 1983-02-28 | 1983-02-28 | Metal cord for reinforcing rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59157391A (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108397U (en) * | 1984-12-21 | 1986-07-09 | ||
| JPS61174486A (en) * | 1985-01-23 | 1986-08-06 | 東京製綱株式会社 | Steel code for reinforcing rubber |
| JPH0162396U (en) * | 1987-10-16 | 1989-04-20 | ||
| JPH01298288A (en) * | 1988-05-20 | 1989-12-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH023496U (en) * | 1988-06-21 | 1990-01-10 | ||
| JPH0226990A (en) * | 1988-07-09 | 1990-01-29 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH0253981A (en) * | 1988-08-10 | 1990-02-22 | Kanai Hiroyuki | Steel cord and tire |
| JPH0229495U (en) * | 1988-08-10 | 1990-02-26 | ||
| JPH0261185A (en) * | 1988-08-20 | 1990-03-01 | Kanai Hiroyuki | Steel cord and tire |
| JPH0261188A (en) * | 1988-08-23 | 1990-03-01 | Kanai Hiroyuki | Steel cord and tire |
| JPH0291291A (en) * | 1988-09-27 | 1990-03-30 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JPH02104783A (en) * | 1988-10-11 | 1990-04-17 | Kanai Hiroyuki | Steel cord and tire |
| JPH02118189A (en) * | 1988-10-26 | 1990-05-02 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JPH02127581A (en) * | 1988-11-05 | 1990-05-16 | Kanai Hiroyuki | Production of steel cord and apparatus therefor |
| JPH03878A (en) * | 1989-05-26 | 1991-01-07 | Sumitomo Rubber Ind Ltd | Steel ply for tire |
| JPH03161584A (en) * | 1989-11-21 | 1991-07-11 | Kanai Hiroyuki | Steel cord and tire |
| JPH0530192U (en) * | 1991-09-30 | 1993-04-20 | 金井 宏之 | Steel cord for reinforcing rubber products |
| US5293737A (en) * | 1989-12-20 | 1994-03-15 | Tokusen Kogyo Company Limited | Steel cord for reinforcement of rubber products |
| US5319915A (en) * | 1990-06-16 | 1994-06-14 | Tokusen Kogyo Co., Ltd. | Steel cord for reinforcing rubber product |
| US5337549A (en) * | 1989-12-20 | 1994-08-16 | Tokusen Kogyo Company Limited | Steel cord for reinforcement of rubber products |
-
1983
- 1983-02-28 JP JP3094483A patent/JPS59157391A/en active Pending
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108397U (en) * | 1984-12-21 | 1986-07-09 | ||
| JPS61174486A (en) * | 1985-01-23 | 1986-08-06 | 東京製綱株式会社 | Steel code for reinforcing rubber |
| JPH0162396U (en) * | 1987-10-16 | 1989-04-20 | ||
| JPH0332555Y2 (en) * | 1987-10-16 | 1991-07-10 | ||
| JPH01298288A (en) * | 1988-05-20 | 1989-12-01 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH0344922B2 (en) * | 1988-05-20 | 1991-07-09 | Toyo Tire & Rubber Co | |
| JPH023496U (en) * | 1988-06-21 | 1990-01-10 | ||
| JPH0417596Y2 (en) * | 1988-06-21 | 1992-04-20 | ||
| JPH0226990A (en) * | 1988-07-09 | 1990-01-29 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JPH0369721B2 (en) * | 1988-07-09 | 1991-11-05 | Toyo Tire & Rubber Co | |
| JPH0229495U (en) * | 1988-08-10 | 1990-02-26 | ||
| JPH0253981A (en) * | 1988-08-10 | 1990-02-22 | Kanai Hiroyuki | Steel cord and tire |
| JPH0477Y2 (en) * | 1988-08-10 | 1992-01-06 | ||
| JPH0261185A (en) * | 1988-08-20 | 1990-03-01 | Kanai Hiroyuki | Steel cord and tire |
| JPH0261188A (en) * | 1988-08-23 | 1990-03-01 | Kanai Hiroyuki | Steel cord and tire |
| JPH0291291A (en) * | 1988-09-27 | 1990-03-30 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JPH02104783A (en) * | 1988-10-11 | 1990-04-17 | Kanai Hiroyuki | Steel cord and tire |
| US5162067A (en) * | 1988-10-11 | 1992-11-10 | Tokusen Kogyo Company Limited | Steel cord of substantially elliptical cross-section and tire reinforced with same |
| JPH0325557B2 (en) * | 1988-10-11 | 1991-04-08 | Kanai Hiroyuki | |
| JPH02118189A (en) * | 1988-10-26 | 1990-05-02 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JPH02127581A (en) * | 1988-11-05 | 1990-05-16 | Kanai Hiroyuki | Production of steel cord and apparatus therefor |
| JPH03878A (en) * | 1989-05-26 | 1991-01-07 | Sumitomo Rubber Ind Ltd | Steel ply for tire |
| JPH03161584A (en) * | 1989-11-21 | 1991-07-11 | Kanai Hiroyuki | Steel cord and tire |
| US5293737A (en) * | 1989-12-20 | 1994-03-15 | Tokusen Kogyo Company Limited | Steel cord for reinforcement of rubber products |
| US5337549A (en) * | 1989-12-20 | 1994-08-16 | Tokusen Kogyo Company Limited | Steel cord for reinforcement of rubber products |
| US5319915A (en) * | 1990-06-16 | 1994-06-14 | Tokusen Kogyo Co., Ltd. | Steel cord for reinforcing rubber product |
| JPH0530192U (en) * | 1991-09-30 | 1993-04-20 | 金井 宏之 | Steel cord for reinforcing rubber products |
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