JPH03193983A - Steel cord for reinforcing rubber product - Google Patents
Steel cord for reinforcing rubber productInfo
- Publication number
- JPH03193983A JPH03193983A JP1331983A JP33198389A JPH03193983A JP H03193983 A JPH03193983 A JP H03193983A JP 1331983 A JP1331983 A JP 1331983A JP 33198389 A JP33198389 A JP 33198389A JP H03193983 A JPH03193983 A JP H03193983A
- Authority
- JP
- Japan
- Prior art keywords
- steel cord
- rubber
- cord
- steel
- cross
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 230000003014 reinforcing effect Effects 0.000 title claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 4
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000012999 compression bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0057—Reinforcements comprising preshaped elements, e.g. undulated or zig-zag filaments
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2074—Physical properties or dimension of the belt cord
- B60C2009/2077—Diameters of the cords; Linear density thereof
-
- 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
- D07B1/0646—Reinforcing cords for rubber or plastic articles comprising longitudinally preformed wires
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ropes Or Cables (AREA)
- 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、自動車用タイヤ及びコンベアベルト等のゴム
補強材として使用される新規な撚り構成のゴム製品補強
用スチールコードに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a steel cord for reinforcing rubber products with a novel twisted structure, which is used as a rubber reinforcing material for automobile tires, conveyor belts, and the like.
（従来の技術）
従来、タイヤ等のゴム製品補強用に用いられるスチール
コードとしては、第４図（イ）、（ロ）、（ハ）に示す
ような、ＩＸ３．１×４．１×５構成のものが一般的で
あった。しかしこのような構成のスチールコード（１２
）は、複数本の素線（１１）が密着して撚り合わせであ
るため、加硫時にゴムがスチールコードの中央部に形成
された空胴部りまで浸入せず、コードの長手方向に連続
して空胴部りがそのまま残る。このためこのようなスチ
ールコードを使用したタイヤでは、自動車の走行中にタ
イヤが外傷を受けた場合、この傷口より浸入した水分が
スチールコードの空胴部り内に入り込みスチールコード
の長手方向に浸透してスチールコードを腐食させ、スチ
ールコードとゴムとの接着が低下する、いわゆるセパレ
ージ日ン現象を起こしてタイヤの寿命を著しく短くして
いた。(Prior art) Steel cords conventionally used for reinforcing rubber products such as tires are IX3.1 x 4.1 x 5 steel cords as shown in Fig. 4 (a), (b), and (c). configuration was common. However, steel cord (12
), since multiple strands (11) are closely twisted together, the rubber does not penetrate into the cavity formed in the center of the steel cord during vulcanization, and is continuous in the longitudinal direction of the cord. The cavity remains as it is. For this reason, in tires using such steel cords, if the tire is damaged while the car is running, moisture that has entered through this wound will enter the cavity of the steel cord and penetrate in the longitudinal direction of the steel cord. This causes the steel cord to corrode, causing the so-called separation sun phenomenon in which the adhesion between the steel cord and the rubber deteriorates, significantly shortening the life of the tire.
しかしながら、近年高強力の線材の開発も進みスチール
コードの構成素線本数も少なく出来るようになったため
、特開昭６２−２３４９２１号および特開昭８２−１１
７８９３号公報に示されるようなＩＸ２の構成のゴム補
強用スチールコードが開発されている。第５図にその構
造を示す。この構成のスチールコード（２２）では、前
記の空胴部りは存在しないため水分の浸入によるスチー
ルコードの腐食を防止できる。しかも高強力の素線を使
用しているため、素線本数が少なくても強度的に充分満
足できるものである。However, in recent years, the development of high-strength wire rods has made it possible to reduce the number of strands that make up steel cords.
A rubber reinforcing steel cord having an IX2 configuration as shown in Japanese Patent No. 7893 has been developed. Figure 5 shows its structure. In the steel cord (22) having this configuration, since the above-mentioned hollow portion does not exist, corrosion of the steel cord due to moisture intrusion can be prevented. Moreover, since high-strength wires are used, the strength can be sufficiently satisfied even with a small number of wires.
（発明が解決しようとする課題）
上記スチールコード（２２）では、耐腐食性は大きく改
善された。しかし、最近の自動車等の高速化および乗心
地性の品質向上要求等に対しては未だ充分とは言えない
。それに応えるには、スチールコードの耐疲労性のさら
なる向上であり、また柔軟性の向上である。上記１×２
のスチールコード（２２）は素線（２１）が線接触して
いるため、フレッティング摩耗が発生し易く、また接触
している面においてはゴムが浸入せず、２本の素線が一
体となっているため、フラット線を捻ったような構成と
なり、繰り返し圧縮引張曲げ疲労に対しては挫屈が発生
し易く、耐疲労寿命および柔軟性が劣っていた。(Problems to be Solved by the Invention) The steel cord (22) has significantly improved corrosion resistance. However, it is still not sufficient to meet the demands for higher speeds in recent automobiles and improvements in ride quality. In order to meet this demand, it is necessary to further improve the fatigue resistance of steel cords and improve their flexibility. 1×2 above
Since the steel cord (22) has wires (21) in contact with each other, fretting wear is likely to occur, and rubber does not penetrate into the contacting surface, so the two wires are integrated. As a result, the structure resembles a twisted flat wire, which tends to buckle under repeated compression/tensile bending fatigue, resulting in poor fatigue life and flexibility.
（課題を解決するための手段）
本発明は上記問題点を改善するためなされたものであり
、２本の素線を撚り合わせてなるスチールコードにおい
て、各素線は線径が０．２５〜０．３５ｍｍで炭素含有
量が０．７５〜０．８５重量％であり、撚り合わせたス
チールコードの撚りピッチが３．０〜１６．０Ｉ１１で
、平均形付率が１０５〜！５０％であるゴム補強用スチ
ールコードである。さらに、前記スチールコードの横断
面形状が長手方向に略同一向きで略楕円形状であり、そ
の長径Ｄ□と短径Ｄ２の比が１．１≦Ｄ ｒ ／ Ｄ
２≦２．２であるゴム製品補強用スチールコードである
。(Means for Solving the Problems) The present invention has been made to improve the above problems, and in a steel cord made by twisting two strands, each strand has a wire diameter of 0.25 to The carbon content is 0.75-0.85% by weight at 0.35mm, the twist pitch of the twisted steel cord is 3.0-16.0I11, and the average forming rate is 105-! 50% rubber reinforced steel cord. Furthermore, the cross-sectional shape of the steel cord is substantially elliptical in substantially the same direction in the longitudinal direction, and the ratio of the major axis D□ to the minor axis D2 is 1.1≦D r / D.
This is a steel cord for reinforcing rubber products where 2≦2.2.
ここで平均形付率とは第３図に示すように２本の素線を
稠密に撚り合わせたときのコード径をｄｃとし、素線間
に少し隙間（Ｃ）を設けて撚り合わせたときのコード径
をｄｏ （ｄｏの値は長手方向で複数ケ所測定した値の
平均値）としたとき次式で表される数値を言う。Here, the average shaping rate is defined as the cord diameter when two wires are tightly twisted together as shown in Figure 3, and the cord diameter is dc, and when the wires are twisted with a small gap (C) between them. When the cord diameter of is do (the value of do is the average value of values measured at multiple locations in the longitudinal direction), it is a numerical value expressed by the following formula.
ただし、素線間の隙間が第３図に示すように、長手方向
に一定して設けられていることは、物理的にも考えられ
ないので部分的に２本の素線が接触する箇所も存在する
。However, as shown in Figure 3, it is physically impossible for the gaps between the strands to be constant in the longitudinal direction, so there may be places where two strands touch each other. exist.
また、横断面が略楕円形状の場合は、楕円の長径をＤ
ｚ短径をＤ２としたとき（第２図参照）断面形状が楕円
の場合のｄｏの値も長手方向で複数ケ所測定し平均した
ものである。In addition, when the cross section is approximately elliptical, the major axis of the ellipse is D
When the z minor axis is D2 (see FIG. 2), the value of do when the cross-sectional shape is an ellipse is also measured at multiple locations in the longitudinal direction and averaged.
（作用）
本発明のスチールコード（２）は上記のように素線径、
炭素含有量、撚りピッチが限定されているため従来と同
じ強度、柔軟性を保持でき、さらに平均形付率力月０５
〜１５０％としているため、第１図および第２図に示す
如く素線（１）間に空隙が発生し、素線間にゴムがよく
浸入する。そして素線全体がゴムで包まれるため、耐食
性も従来よりさらに向上し、また素線同士によるフレッ
ティング摩耗はほとんどなくなる。しかも、素線がスチ
ールコードとしての役割を果たしながらもそれぞれが単
独でゴム補強材としての働きもするようになり、挫屈が
発生し難く、耐疲労寿命および柔軟性も向上する。(Function) The steel cord (2) of the present invention has a wire diameter,
Because the carbon content and twist pitch are limited, the same strength and flexibility as conventional products can be maintained, and the average forming rate is 0.5
150%, gaps are generated between the wires (1) as shown in FIGS. 1 and 2, and the rubber often penetrates between the wires. Since the entire wire is wrapped in rubber, corrosion resistance is further improved than before, and fretting wear between the wires is almost eliminated. In addition, while the strands play the role of steel cords, each of them also acts as a rubber reinforcing material by itself, making buckling less likely to occur and improving fatigue life and flexibility.
この場合の各素線の線径を０．２Ｆｖ＋ａφ以上０．３
５ｎｎφ以下としたのは、タイヤ等に使用する場合、従
来に比較して素線本数が少ないので適当な強力を得るた
め０．２５ｖｏφは最低限必要である。しかし、０．３
５１ｍφを越えると柔軟性に劣る。In this case, the wire diameter of each strand is 0.2Fv + aφ or more 0.3
The reason why the wire diameter is set to 5 nnφ or less is that when used in tires or the like, the number of strands is smaller than in the past, so 0.25 voφ is the minimum required to obtain appropriate strength. However, 0.3
If the diameter exceeds 51 mφ, the flexibility will be poor.
炭素含有量は、高張力線を使用するため０．７５％以上
は必要であるが０．８５％を越えると伸線、撚線工程で
断線が多発する。The carbon content must be 0.75% or more since high-tensile wire is used, but if it exceeds 0.85%, wire breakage will occur frequently during the wire drawing and twisting steps.
撚ピツチはあまり長くするとスチールコードの撚不良が
多発し、また取扱作業が困難である。このためＩＢ、０
ｍｍ以下であることが必要である。しかし、３．Ｏｍｍ
未溝であると伸びが大きくなり過ぎるため一般のタイヤ
等の補強材としては適さなくなる。If the twisting pitch is too long, the steel cord will often fail to twist, and handling will be difficult. For this reason, IB, 0
It is necessary that the thickness be less than mm. However, 3. Omm
If it is not grooved, it will elongate too much, making it unsuitable as a reinforcing material for general tires, etc.
平均形付率は１０５％未満では素線間へのゴム浸入が不
十分となり、また、１５０％を越えるとコードが伸び易
くなり成形加工時の寸法維持が困難となったり、ゴムシ
ートでカレンダーする場合作業性も悪くなる。If the average forming rate is less than 105%, rubber will not penetrate between the wires sufficiently, and if it exceeds 150%, the cord will tend to stretch, making it difficult to maintain the dimensions during molding, or calendering with a rubber sheet. In this case, workability also deteriorates.
さらに前記スチールコードの横断面形状を第２図に示す
如く略楕円とすることにより、撚りの安定性を向上させ
ながら素線間のゴム浸入を促進することができ、また圧
縮曲げ疲労にも宵効で、しかもスチールコードを包むゴ
ムシートの厚さを薄くすることが出来る。しかし、Ｄ、
／Ｄ２が１．１未満であるとその効果は期待出来ず、２
．２を越えると長手方向に圧縮を受けると挫屈し易くな
って耐疲労性に劣るようになる。このため１．１５Ｄ＋
／ Ｄ ２≦２．２の範囲が好適である。Furthermore, by making the cross-sectional shape of the steel cord approximately elliptical as shown in Fig. 2, it is possible to improve the stability of twisting while promoting penetration of rubber between the strands, and also to prevent compression bending fatigue. This makes it possible to reduce the thickness of the rubber sheet that wraps the steel cord. However, D.
/D2 is less than 1.1, the effect cannot be expected, and 2
．． If it exceeds 2, it will tend to buckle when compressed in the longitudinal direction, resulting in poor fatigue resistance. Therefore 1.15D+
The range of /D2≦2.2 is suitable.
（実施例）
次に、本発明の実施例と従来例および比較例を具体的に
説明する。第１表は、表面にプラスメツキを施した２本
の素線を撚り合わせた各種スチールコードの試験結果を
示したものであり、スチールコードの素線径、炭素含有
量、撚ピツチ、平均形付率、断面形状を種々変化させて
いる。(Example) Next, an example of the present invention, a conventional example, and a comparative example will be specifically described. Table 1 shows the test results of various steel cords made by twisting together two strands of wire with a plasplated surface. The ratio and cross-sectional shape are varied.
実験Ｎａｌ＋２は、前述の特開昭６２−２３４９２１号
および特開昭８２−１１７８９３号公報に示された従来
のスチールコード（第５図）を示し、実験Ｈｕ７〜９は
第２図に示す如く、２本の素線（１）を用いた横断面が
略円形の本願発明のスチールコード（２）、実験Ｎα１
０〜１２は第３図に示す如く、２本の素線（１）を用い
た横断面が略楕円形の本願発明のスチールコード（２）
である。また、実験点３〜６と１３は比較例のスチール
コードである。平均形付率は撚線機のくせつけビンの間
隔、寸法等を調整することにより、また断面形状を楕円
形状にするためには小径のフラットローラーを千鳥状に
配列した矯正機を通すことにより容易に製造できるもの
である。撚線機としてはパンチャー型を用いた。そして
本発明のスチールコード（２）を第６図（イ）に示すよ
うに上下よりゴムシート（５）で覆い、複合体シート（
６）を作成した。なお、従来例および比較例も同様にし
て複合体シートを得た。Experiment Nal+2 shows the conventional steel cord (Fig. 5) shown in the above-mentioned Japanese Patent Application Laid-Open No. 62-234921 and Japanese Patent Application Laid-open No. 82-117893, and Experiments Hu7 to 9 show the conventional steel cord (Fig. 5) as shown in Fig. 2. Steel cord (2) of the present invention with a substantially circular cross section using two strands (1), experiment Nα1
As shown in FIG. 3, 0 to 12 are steel cords (2) of the present invention with a substantially elliptical cross section using two strands (1).
It is. Moreover, experimental points 3 to 6 and 13 are steel cords of comparative examples. The average shaping rate can be determined by adjusting the spacing and dimensions of the straightening bins on the twisting machine, and in order to make the cross-sectional shape oval, the wire can be passed through a straightening machine with small diameter flat rollers arranged in a staggered manner. It can be easily manufactured. A puncher type was used as the wire twisting machine. Then, the steel cord (2) of the present invention is covered with rubber sheets (5) from above and below as shown in FIG. 6 (A), and the composite sheet (
6) was created. Note that composite sheets were obtained in the same manner as in the conventional example and the comparative example.
またこの複合体シートを第６図（ロ）に示す如く、タイ
ヤ（８）のベルト部（７）に用いた。このような各種ス
チールコードの各状態における破断強力、ゴム加硫した
場合の素線間へのゴム浸入率、ゴムとの複合体としての
圧縮引張曲げ疲労性、５ｋｇ荷重時伸びおよびゴム製品
加工時における取扱作業性を次のようにして評価した。Further, this composite sheet was used for a belt portion (7) of a tire (8) as shown in FIG. 6(b). The breaking strength of these various steel cords in each state, the rate of rubber infiltration between the wires when rubber is vulcanized, the compression/tensile bending fatigue strength as a composite with rubber, the elongation under a load of 5 kg, and the processing of rubber products. The handling workability was evaluated as follows.
１翫１九
スチールコードのみの破断荷重であり、この種のスチー
ルコードとしては少なくとも２５ｋｇｆ以上必要である
。This is the breaking load of only 1 rod and 19 steel cords, and this type of steel cord requires at least 25 kgf or more.
ヱＡｌ友監
ゴムに埋設し加硫した後、スチールコードを抜きとりそ
の素線を引き剥がす、２本の素線が接している面にゴム
がどの程度浸入しているかを百分率で示す。After embedding in aluminum rubber and vulcanizing, the steel cord is pulled out and its strands are peeled off.The percentage shows how much rubber has penetrated into the surface where the two strands are in contact.
ｉ′ 番
スチールコードを複数本ゴムシートに埋め込み、このシ
ートで３点プーリー曲げ疲労試験機により評価した。結
果は指数表示した。最終的にはフレッティング摩耗、挫
屈等により破断に至るがこの状態になるまでの繰り返し
回数で評価する。A plurality of No. i' steel cords were embedded in a rubber sheet, and the sheet was evaluated using a three-point pulley bending fatigue tester. The results were expressed as an index. Eventually, it will break due to fretting wear, buckling, etc., but the evaluation is based on the number of repetitions until this state is reached.
取１」［ｉ牲−
スチールコードの製造における取扱およびゴムシートに
埋設する場合並びにタイヤ等の成型工程でのスチールコ
ードの取扱作業性をいい、スチールコードのフレアー性
、低荷重伸び、スチールコード相互間のからみ合いおよ
び真直性等が関係する。従来品と比較して非常に劣るも
のを×、少し劣るものを△、差がないものをＯとして評
価した。Tori 1 "[i-same--" refers to the handling workability of steel cords in the manufacturing process, when embedding them in rubber sheets, and in the molding process of tires, etc., and refers to the flaring property of steel cords, low elongation under load, and the ease of handling steel cords when embedding them in rubber sheets and in the molding process of tires, etc. The intertwining between them and their straightness are related. Those that were very inferior to the conventional product were evaluated as ×, those that were slightly inferior were evaluated as △, and those that had no difference were evaluated as O.
第１表より明らかなように、本発明のスチールコードは
、破断荷重も必要な２５ｋｇｆを有し素線間へゴムがよ
（浸入しており、疲労性も向上し、取扱作業性も従来品
と大差はない。また本発明のスチールコードをタイヤに
使用した結果、タイヤの寿命を大幅に向上し、乗心地性
を改善した。横断面が楕円のスチールコードはゴムシー
ト厚を薄くすることが出来、タイヤの計量化が図れると
ともに、乗心地性の改善も期待できる。As is clear from Table 1, the steel cord of the present invention has a required breaking load of 25 kgf, has rubber that penetrates between the wires, has improved fatigue resistance, and is easier to handle than the conventional steel cord. There is no big difference between the steel cord of the present invention and the use of the steel cord in a tire, which significantly extends the life of the tire and improves ride comfort.The steel cord with an oval cross section allows the rubber sheet to be made thinner. In addition to making it possible to measure tires, it is also expected to improve riding comfort.
（発明の効果）
本発明のスチールコードは前記構成であるため素線間に
ゴムが確実に浸入する。しかも、スチールコードとして
の強力も充分であり撚りも安定している。このため、タ
イヤ等のゴム製品に使用した場合、取扱作業性も劣らず
耐腐食性も従来より改善され、フレッティング摩耗も著
しく減少し、タイヤの寿命を大幅に延長することができ
、さらに乗心地性も改善される等その効果は極めて優れ
ている。(Effects of the Invention) Since the steel cord of the present invention has the above-mentioned configuration, the rubber reliably infiltrates between the strands. Moreover, it is strong enough as a steel cord and the twisting is stable. Therefore, when used in rubber products such as tires, handling efficiency is not inferior, corrosion resistance is improved compared to conventional products, fretting wear is significantly reduced, and the life of the tire can be greatly extended. The effects are extremely good, including improved comfort.
第１図は本発明のスチールコードの一実施例を示し、（
イ）は概略平面図、（ロ）のＡ−Ｇは（イ）のＡ−Ａ線
〜Ｇ−Ｇ線における各断面図、第２図は横断面が楕円形
状の本発明のスチールコードの一実施例であり、（イ）
は概略平面図、（ロ）は同正面図、（ハ）のＡ−Ｇは（
イ）のＡ−Ａ線〜Ｇ−Ｇ線における各断面図、第３図（
イ）は素線間に隙間を有するスチールコードの断面図、
（ロ）は稠密に撚られたスチールコードの断面図、第４
図（イ）、（ロ）、（ハ）、第５實＾ｙ蓄へζおよび最
近のスチールコードの断面図、第６図（イ）はスチール
コードを埋設したゴムシートの断面図、（ロ）はそのシ
ートをベルト部に用いたタイヤの要部断面図である。
Ｌ １１．２１・・・素線
２、＋２．２２・・・スチールコード
５・・・ゴムシート ６・・・複合体シート７・
・・ベルト部 ８・・・タイヤＮ１図
第２図
−１−１
９，１
一
り−
Ｅ、Ｊ
１−、Ｊ
〇−
第３図
第４図
第５図
（イ）
（℃ン
第６図
（イ）
（ロ）
８ タイヤ
／FIG. 1 shows an embodiment of the steel cord of the present invention, (
A) is a schematic plan view, A-G in (B) is a cross-sectional view taken along lines A-A to G-G in (A), and FIG. 2 is a steel cord of the present invention having an elliptical cross section. This is an example, and (a)
is a schematic plan view, (b) is a front view, and A-G in (c) is (
B) Each cross-sectional view from line A-A to line G-G, Figure 3 (
A) is a cross-sectional view of a steel cord with gaps between the strands,
(b) is a cross-sectional view of a densely twisted steel cord, No. 4
Figures (A), (B), (C) are cross-sectional views of the fifth example and recent steel cords, and Figure 6 (A) is a cross-sectional view of a rubber sheet with embedded steel cords. ) is a sectional view of a main part of a tire using the sheet as a belt portion. L 11.21...Element wire 2, +2.22...Steel cord 5...Rubber sheet 6...Composite sheet 7.
...Belt part 8...Tire N1 Figure Figure 2-1-1 9,1 One- E, J 1-, J 〇- Figure 3 Figure 4 Figure 5 (a) (℃n 6 Figure (a) (b) 8 Tires/
Claims (2)
おいて、各素線は線径が０．２５〜０．３５ｍｍで、炭
素含有量が０．７５〜０．８５重量％であり、撚り合わ
せたスチールコードの撚りピッチが３．０〜１６．０ｍ
ｍで、平均形付率が１０５〜１５０％であることを特徴
とするゴム製品補強用スチールコード。(1) In a steel cord made of two strands twisted together, each strand has a wire diameter of 0.25 to 0.35 mm, a carbon content of 0.75 to 0.85% by weight, and The twisted pitch of the combined steel cord is 3.0 to 16.0 m.
A steel cord for reinforcing rubber products, characterized in that the average forming rate is 105 to 150%.
向きで略楕円形状であり、その長径 Ｄ＿１と短径Ｄ＿２の比が１．１≦Ｄ＿１／Ｄ＿２≦２
．２である請求項１記載のゴム製品補強用スチールコー
ド。(2) The cross-sectional shape is approximately elliptical in the same direction as the longitudinal direction of the steel cord, and the ratio of the major axis D_1 to the minor axis D_2 is 1.1≦D_1/D_2≦2
．． 2. The steel cord for reinforcing rubber products according to claim 1.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1331983A JPH03193983A (en) | 1989-12-20 | 1989-12-20 | Steel cord for reinforcing rubber product |
| DE69032298T DE69032298T2 (en) | 1989-12-20 | 1990-12-18 | Steel rope for the reinforcement of elastomeric products |
| EP90124527A EP0433962B1 (en) | 1989-12-20 | 1990-12-18 | Steel cord for reinforcement of rubber products |
| KR1019900021156A KR950007828B1 (en) | 1989-12-20 | 1990-12-20 | Steel cord for reinforcement of rubber products |
| US07/866,941 US5293737A (en) | 1989-12-20 | 1992-04-03 | Steel cord for reinforcement of rubber products |
| US08/093,905 US5337549A (en) | 1989-12-20 | 1993-07-20 | Steel cord for reinforcement of rubber products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1331983A JPH03193983A (en) | 1989-12-20 | 1989-12-20 | Steel cord for reinforcing rubber product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03193983A true JPH03193983A (en) | 1991-08-23 |
Family
ID=18249831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1331983A Pending JPH03193983A (en) | 1989-12-20 | 1989-12-20 | Steel cord for reinforcing rubber product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03193983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112010004043T5 (en) | 2009-10-16 | 2012-07-26 | The Yokohama Rubber Co., Ltd. | tire |
| CN109338766A (en) * | 2018-11-10 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | 1 × n of one kind × d series radial tires steel cord production method |
-
1989
- 1989-12-20 JP JP1331983A patent/JPH03193983A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112010004043T5 (en) | 2009-10-16 | 2012-07-26 | The Yokohama Rubber Co., Ltd. | tire |
| DE112010004043B4 (en) * | 2009-10-16 | 2014-01-16 | The Yokohama Rubber Co., Ltd. | Steel cord for a pneumatic tire |
| CN109338766A (en) * | 2018-11-10 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | 1 × n of one kind × d series radial tires steel cord production method |
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