JPH0663183B2 - Steel code - Google Patents
Steel codeInfo
- Publication number
- JPH0663183B2 JPH0663183B2 JP59208493A JP20849384A JPH0663183B2 JP H0663183 B2 JPH0663183 B2 JP H0663183B2 JP 59208493 A JP59208493 A JP 59208493A JP 20849384 A JP20849384 A JP 20849384A JP H0663183 B2 JPH0663183 B2 JP H0663183B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- layer
- steel cord
- carbon content
- steel
- 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 - Lifetime
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
- 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
- D07B1/066—Reinforcing cords for rubber or plastic articles the wires being made from special alloy or special steel composition
-
- 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
- D07B1/0626—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration the reinforcing cords consisting of three core wires or filaments and at least one layer of outer wires or filaments, i.e. a 3+N configuration
-
- 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
- D07B1/0633—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration having a multiple-layer 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
- D07B2201/2024—Strands twisted
- D07B2201/2029—Open winding
- D07B2201/2031—Different twist pitch
-
- 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
- D07B2201/2041—Strands characterised by the materials used
-
- 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
- D07B2201/2047—Cores
- D07B2201/2066—Cores characterised by the materials used
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
- D07B2205/3046—Steel characterised by the carbon content
Landscapes
- Ropes Or Cables (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はタイヤやベルト等のゴム補強材として使用され
るスチールコードに関するものである。TECHNICAL FIELD The present invention relates to a steel cord used as a rubber reinforcing material for tires, belts and the like.
一般にこの種のスチールコードは極細の素線を複数本撚
り合わせて構成するが、本願発明に係るスチールコード
は、これら素線が全て同一の素線径よりなり、順次外側
へ積層して撚り合わせて構成される複層撚りのスチール
コードである。In general, this type of steel cord is formed by twisting a plurality of fine wires, but the steel cord according to the present invention has all the wires having the same diameter, and the wires are sequentially laminated outside and twisted together. It is a multi-layer twisted steel cord.
従来の技術 従来、第２図(イ)および(ロ)に示すように、複数本の素線
１を撚り合わせて、第１表に示すスチールコード２を形
成していた。2. Description of the Related Art Conventionally, as shown in FIGS. 2A and 2B, a plurality of element wires 1 are twisted together to form a steel cord 2 shown in Table 1.
上記スチールコード２の設計にあたっては、一定の強力
を保ちながら、素線１をいろいろ組み合わせて、柔軟
性、耐疲労性、接着性の良いものを得んとして改良され
てきた。なお、この他に考えられる構成としては２＋
７、３＋９、４＋９＋15等がある。しかし、これら従来
のスチールコードでは内層ほど撚りピッチが小さいた
め、素線に対する捻り応力が大きくなり断線しやすいと
いう欠点があった。 In designing the steel cord 2, while maintaining a constant strength, various combinations of the strands 1 have been made to improve the flexibility, fatigue resistance and adhesiveness. Note that other possible configurations are 2+
There are 7, 3 + 9, 4 + 9 + 15 etc. However, in these conventional steel cords, since the twist pitch is smaller toward the inner layer, there is a drawback that the twisting stress on the wire becomes large and the wire is easily broken.
上記欠点はスチールコードの強力アップが要求され、抗
張力の高い素線が使用されるほど顕著に現われる。この
ため、生産性のよい二度撚り撚線機を使用する場合にお
いても断線が発生し、生産性の低下を引き起こしてい
た。The above-mentioned drawbacks become more prominent as the strength of the steel cord is required to be increased and a wire having high tensile strength is used. For this reason, even when a double-twisting wire machine with good productivity is used, disconnection occurs, causing a decrease in productivity.
さらに、これらスチールコードが補強材としてゴム材中
に埋め込まれて使用されたときに、内層より破断し易い
という欠点がある。Further, when these steel cords are used as a reinforcing material by being embedded in a rubber material, they are more easily broken than the inner layer.
問題点を解決するための手段 本発明は上記欠点を除去するためになされたものであ
り、スチールコードの生産工程中あるいはスチールコー
ドをゴム材中に埋め込んで使用中に発生する断線を少な
くし、スチールコードにおける内層よりの破断を防ぐこ
とを目的としたものである。Means for Solving the Problems The present invention has been made to eliminate the above-mentioned drawbacks, and reduces the wire breakage that occurs during the production process of steel cords or by embedding the steel cords in a rubber material during use, The purpose is to prevent breakage from the inner layer of the steel cord.
上記目的を達成するために、スチールコードを構成する
素線の炭素含有量を異ならせるもので、内層側を構成す
る素線を炭素含有量の少ない鋼線、外層側を構成する素
線を炭素含有量の多い鋼線を用いて形成し、内層側が小
さい撚りピッチで構成しても断線の生じないスチールコ
ードを提供するものである。In order to achieve the above object, the carbon content of the wires forming the steel cord is made different, the wire forming the inner layer side is a steel wire with a low carbon content, and the wire forming the outer layer side is a carbon wire. It is intended to provide a steel cord which is formed by using a steel wire having a large content and which is not broken even if the inner layer side is configured with a small twist pitch.
すなわち、内側の層の撚りピッチが外側の層の撚りピッ
チより小さく、かつ同一素線径を有する鋼線により構成
された複層撚りのスチールコードにおいて、少なくとも
最内層を構成する素線の炭素含有量が0.43〜0.67重量％
であり、少なくとも最外層を構成する素線の炭素含有量
が0.75〜0.90重量％であるスチールコードである。That is, in the steel cord of the multi-layer twist in which the twist pitch of the inner layer is smaller than the twist pitch of the outer layer, and in the steel cord of the multi-layer twist formed by the steel wires having the same strand diameter, at least the carbon content of the strand forming the innermost layer is included. Amount 0.43 to 0.67% by weight
It is a steel cord in which the carbon content of at least the wire constituting the outermost layer is 0.75 to 0.90% by weight.
ここで、複層撚りスチールコードで、内層ほど撚りピッ
チを小さくしたのは、コードの破断において各層の破断
時伸びを合致させ、同時に破断が行われるようにしたた
めである。撚りピッチは4.0mm〜20mmの範囲で、撚り方
向はＳ撚り、Ｚ撚りのものが適宜選択される。各素線は
素線径が0.15mm〜0.4mmで、その表面に真鍮メッキ、亜
鉛メッキ等のメッキが施されている。Here, in the multi-layer twisted steel cord, the twist pitch is made smaller toward the inner layer because the elongation at break of each layer is matched when the cord is broken so that the cords are broken at the same time. The twist pitch is in the range of 4.0 mm to 20 mm, and the twist direction is S twist or Z twist. Each wire has a wire diameter of 0.15 mm to 0.4 mm, and its surface is plated with brass or zinc.
ところで、最外層を構成する素線の炭素含有量を0.75〜
0.90重量％に限定したのは、内層を構成する素線の炭素
含有量が、従来使用していた素線の炭素含有量よりも少
ないため、スチールコード全体としての強力を少なくと
も従来と同等か、若しくはそれ以上とするために、その
下限を0.75重量％としたものであり、また上限を0.90重
量％としたのは、これ以上となると線が脆くなり、伸線
工程中、撚線工程中に断線が多発し、生産性が極めて低
下するためである。また、内層を構成する素線の炭素含
有量を0.43〜0.67重量％に限定したのは、炭素含有量の
少ない鋼線を用いることにより、撚りピッチの小さい部
分での断線を少なくするためであり、下限を0.43％とし
たのは、0.43重量％より少ないと撚り合わせてコードと
したとき、内層と外層とで素線の伸びや抗張力の差が大
きすぎ、同時に破断しないためである。By the way, the carbon content of the wire constituting the outermost layer is 0.75 to
The limit of 0.90% by weight is that the carbon content of the wire constituting the inner layer is lower than the carbon content of the wire used in the past, so the strength of the steel cord as a whole is at least equivalent to the conventional strength, Or, in order to be more than that, the lower limit is set to 0.75% by weight, and the upper limit is set to 0.90% by weight, if it is more than this, the wire becomes brittle, and during the wire drawing process and the twisting process, This is because disconnection occurs frequently and productivity is extremely reduced. Further, the carbon content of the wire constituting the inner layer is limited to 0.43 to 0.67% by weight, by using a steel wire having a low carbon content, it is possible to reduce disconnection in a portion with a small twist pitch. The lower limit is set to 0.43% because when the content is less than 0.43% by weight, when the cords are twisted together, the difference between the elongation and the tensile strength of the wire between the inner layer and the outer layer is too large and the cords do not break at the same time.
ところで、少なくとも最外層を構成する素線の炭素含有
量は最内層を構成する素線の炭素含有量に比して大にな
したが、三層以上のスチールコードにおいては、上記炭
素含有量を最外層から最内層に順次小にするのが理想的
である。しかし、最外層Ａ、中間層Ｂ、最内層Ｃの炭素
含有量を、Ａ＝Ｂ＞Ｃ、Ａ＞Ｂ＝Ｃの関係になしてもほ
ゞ同一の効果を達成することができる。By the way, at least the carbon content of the wire forming the outermost layer is higher than the carbon content of the wire forming the innermost layer, but in steel cords with three or more layers, the carbon content is Ideally, the outermost layer is gradually reduced to the innermost layer. However, even if the carbon contents of the outermost layer A, the intermediate layer B, and the innermost layer C have the relations of A = B> C and A> B = C, almost the same effect can be achieved.
さらに、本発明において、これらコードの外周に鋼線を
ラッピングすることも出来るものである。Further, in the present invention, a steel wire can be wrapped around the outer circumference of these cords.
実施例 以下、本発明の一実施例を図面に基いて説明する。Embodiment One embodiment of the present invention will be described below with reference to the drawings.
実施例１ 第１図(イ)に示すように、撚り構成が３＋９＋15のスチ
ールコード３において、その内層を構成する３＋９の層
を形成する素線４の炭素含有量を0.62重量％とし、最外
層を構成する15本の素線５の炭素含有量を0.82重量％と
したものである。Example 1 As shown in FIG. 1 (a), in the steel cord 3 having a twisted structure of 3 + 9 + 15, the carbon content of the wire 4 forming the 3 + 9 layer forming the inner layer is set to 0.62% by weight, and the outermost layer is formed. The carbon content of the 15 strands 5 constituting the above is 0.82% by weight.
上記本願発明のスチールコード３と従来の同構成のスチ
ールコードとを比較し、その結果を第２表に示す。The steel cord 3 of the present invention is compared with the conventional steel cord having the same structure, and the results are shown in Table 2.
実施例２ 第１図(ロ)に示すように、撚り構成が12＋15のスチール
コード６において、その内層を構成する12本の素線７の
炭素含有量を0.62重量％とし、外層を構成する15本の素
線８の炭素含有量を0.82重量％としたものである。さら
に９はラッピングワイヤである。 Example 2 As shown in FIG. 1 (b), in the steel cord 6 having a twist structure of 12 + 15, the carbon content of the 12 strands 7 constituting the inner layer is set to 0.62% by weight and the outer layer is constituted 15 The carbon content of the strand 8 of the book is 0.82% by weight. Further, 9 is a wrapping wire.
上記本願発明のスチールコード６と従来の同構成のスチ
ールコードとを比較し、その結果を第３表に示す。The steel cord 6 of the present invention is compared with the conventional steel cord having the same structure, and the results are shown in Table 3.
なお、上記各実施例において、撚り効率とは素線の破断
強力の合計でコード破断強力を除した値の百分率であ
る。 In each of the above examples, the twisting efficiency is the percentage of the value obtained by dividing the cord breaking strength by the total breaking strength of the wires.
実施例２におけるラッピングワイヤ９は直径0.15mm、炭
素含有量0.65重量％の鋼線であり、ラッピングピッチは
3.5mmである。The wrapping wire 9 in Example 2 is a steel wire having a diameter of 0.15 mm and a carbon content of 0.65% by weight, and the wrapping pitch is
It is 3.5 mm.
上記各実施例の第２表、第３表から明らかなように、従
来のスチールコードが全て同一種類の素線で構成されて
いるため、内、外層における捻り応力や素線のくせ付け
時に発生する歪の違いにより、撚り効率が94％前後であ
ったのに対し、本発明のスチールコードは撚り効率が98
％前後に大幅に向上した。As is clear from Tables 2 and 3 of each of the above-mentioned examples, since the conventional steel cords are all composed of the same type of strands, the twisting stress in the inner and outer layers and the stranding of the strands occur. The twisting efficiency was around 94% due to the difference in strain, whereas the steel cord of the present invention had a twisting efficiency of 98%.
It improved significantly around%.
発明の効果 本発明のスチールコードはその内層に炭素含有量の少な
い鋼線を用いたため、伸線工程、撚線工程における断線
回数が著しく減少し、生産能率を大巾に向上することが
できる。また、撚られた後においても、内層、外層を構
成する各素線の強力低下が少なく全体としての撚り効率
も従来に比べて大きく向上するという優れた効果を有す
るものである。EFFECTS OF THE INVENTION Since the steel cord of the present invention uses a steel wire having a low carbon content in its inner layer, the number of disconnections in the wire drawing process and the twisting process is significantly reduced, and the production efficiency can be greatly improved. Further, even after being twisted, the strength of each wire constituting the inner layer and the outer layer is not significantly reduced, and the twisting efficiency as a whole is greatly improved as compared with the conventional one.
第１図(イ)・(ロ)は夫々本発明の異なる実施例を示すスチ
ールコードを示す断面図、第２図(イ)・(ロ)は夫々従来の
スチールコードを示す断面図である。 1.4.5.7.8……素線 2.3.6……スチールコード ９……ラッピングワイヤ1 (a) and (b) are sectional views showing steel cords showing different embodiments of the present invention, and FIGS. 2 (a) and (b) are sectional views showing conventional steel cords, respectively. 1.4.5.7.8 …… strand 2.3.6 …… steel cord 9 …… wrapping wire
Claims (1)
構成し、かつ内側の層の撚りピッチを外側の層の撚りピ
ッチより小さくしたスチールコードにおいて、少なくと
も最内層を構成する素線の炭素含有量が0.43〜0.67重量
％で、少なくとも最外層を構成する素線の炭素含有量が
0.75〜0.90％であることを特徴とするスチールコード。1. A steel cord in which a twisted wire of an inner layer is made smaller than a twisted pitch of an outer layer, and at least the innermost layer is formed by using a multi-layer twisted wire having the same wire diameter. The carbon content of the wire is 0.43 to 0.67% by weight, and at least the carbon content of the wire forming the outermost layer is
Steel cord characterized by 0.75 to 0.90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59208493A JPH0663183B2 (en) | 1984-10-03 | 1984-10-03 | Steel code |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59208493A JPH0663183B2 (en) | 1984-10-03 | 1984-10-03 | Steel code |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6189390A JPS6189390A (en) | 1986-05-07 |
| JPH0663183B2 true JPH0663183B2 (en) | 1994-08-17 |
Family
ID=16557067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59208493A Expired - Lifetime JPH0663183B2 (en) | 1984-10-03 | 1984-10-03 | Steel code |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663183B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2593207B2 (en) * | 1987-10-15 | 1997-03-26 | ブリヂストンメタルファ株式会社 | High-strength steel wire and steel cord for reinforcing rubber products |
| US5285836A (en) * | 1991-01-31 | 1994-02-15 | Sumitomo Rubber Industries, Ltd. | 3+7+13 steel cord and tire including same |
| GB2501156B (en) * | 2012-02-27 | 2015-03-18 | Gripple Ltd | Improvements in or relating to wire strands |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428525Y2 (en) * | 1973-02-22 | 1979-09-12 | ||
| JPS5274057A (en) * | 1975-12-11 | 1977-06-21 | Kanai Hiroyuki | Manufacture of steel cord |
-
1984
- 1984-10-03 JP JP59208493A patent/JPH0663183B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6189390A (en) | 1986-05-07 |
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