JP3174803B2 - Steel cord for rubber reinforcement - Google Patents

Steel cord for rubber reinforcement

Info

Publication number
JP3174803B2
JP3174803B2 JP29594793A JP29594793A JP3174803B2 JP 3174803 B2 JP3174803 B2 JP 3174803B2 JP 29594793 A JP29594793 A JP 29594793A JP 29594793 A JP29594793 A JP 29594793A JP 3174803 B2 JP3174803 B2 JP 3174803B2
Authority
JP
Japan
Prior art keywords
wire bundle
pitch
wire
wires
steel cord
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 - Fee Related
Application number
JP29594793A
Other languages
Japanese (ja)
Other versions
JPH07126992A (en
Inventor
鎮夫 和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Rope Manufacturing Co Ltd
Original Assignee
Tokyo Rope Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Rope Manufacturing Co Ltd filed Critical Tokyo Rope Manufacturing Co Ltd
Priority to JP29594793A priority Critical patent/JP3174803B2/en
Publication of JPH07126992A publication Critical patent/JPH07126992A/en
Application granted granted Critical
Publication of JP3174803B2 publication Critical patent/JP3174803B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope 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
    • D07B2201/2032—Different twist pitch compared with the core
    • 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
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/206—Cores characterised by their structure comprising wires arranged parallel to the axis
    • 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
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D07B2201/2061—Cores characterised by their structure comprising wires resulting in a twisted structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/20—Type of machine
    • D07B2207/207—Sequential double twisting devices
    • D07B2207/208—Sequential double twisting devices characterised by at least partially unwinding the twist of the upstream double twisting step
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/20—Type of machine
    • D07B2207/209—Tubular strander
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/40—Machine components
    • D07B2207/4004—Unwinding devices
    • D07B2207/4009—Unwinding devices over the head
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/40—Machine components
    • D07B2207/4004—Unwinding devices
    • D07B2207/4013—Unwinding devices comprising flyer
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
    • D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
    • D07B3/10—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position with provision for imparting more than one complete twist to the ropes or cables for each revolution of the take-up reel or of the guide member
    • D07B3/106—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position with provision for imparting more than one complete twist to the ropes or cables for each revolution of the take-up reel or of the guide member characterised by comprising two bows, both guiding the same bundle to impart a twist

Landscapes

  • Ropes Or Cables (AREA)
  • Tires In General (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明はゴム補強用スチールコー
ドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel cord for reinforcing rubber.

【０００２】[0002]

【従来の技術及びその技術的課題】車両用ラジアルタイ
ヤのカーカスなどに埋設されるスチールコードには引張
り力はもとよりすぐれた曲げ疲労性とゴム浸透性が要求
される。従来こうした用途のスチールコードとして図４
のように５本のワイヤＷをねじり合わせることにより構
成された１×５構造のものが知られている。この先行技
術はコードに引張り力が作用したときに各ワイヤに同等
の負荷が掛かるため引張り強度にすぐれ、また繰返し曲
げ疲労性が良好である。しかし、隣接するワイヤ同士が
接触して中心部に空隙が形成されるためゴムの浸透性が
悪く、外傷を受けると水が空隙に進入してコード長手方
向に広がり、腐食が助長されてゴムとの接着力が低下し
いわゆるセパレーション現象を起しやすいという問題が
あった。2. Description of the Related Art A steel cord embedded in a carcass of a radial tire for a vehicle is required to have not only a tensile force but also excellent bending fatigue and rubber permeability. Fig. 4
There is known a 1 × 5 structure formed by twisting five wires W together as shown in FIG. This prior art is excellent in tensile strength because the same load is applied to each wire when a tensile force is applied to the cord, and has good repeated bending fatigue resistance. However, the adjacent wires come into contact with each other to form a void in the center, so that the permeability of the rubber is poor, and if there is a trauma, water will enter the void and spread in the longitudinal direction of the cord, and corrosion will be promoted and However, there has been a problem that the adhesive strength of the resin is reduced and a so-called separation phenomenon is easily caused.

【０００３】また、特公平３−２３６８３号公報には、
２本組のワイヤと３本組のワイヤをより合わせ、２本組
のワイヤをコード長手方向でパラレルとし、３本組のワ
イヤを２本組のワイヤに対し半ピッチごとに図５(a)の
ように大略傘形状、(b)のように大略倒傘形状に交互に
してより合わされた構造のスチールコードが提案されて
いる。しかしこの先行技術においては、実際上、上記図
から明らかなようにスチールコードを構成する２本組の
ワイヤＷ1と３本組のワイヤＷ2の各々が相互に密着し、
かつ２本組のワイヤＷ1と３本組のワイヤＷ2とがコード
長手方向で絶えず密着しているためそれらの間に閉鎖状
空隙Ｓが生じ、ゴム浸透性に難がある。また、２本組の
ワイヤＷ1と３本組のワイヤＷ2の巻き長さが後者が大と
なるため引張り力が作用したときに芯の２本組のワイヤ
Ｗ1が早期断線したり、ワイヤ相互が接触しているため
ワイヤＷ1と３本組のワイヤＷ2に繰返し曲げによるフレ
ッティングが生じ、それによりワイヤ破断が起るため曲
げ疲労性が低下し、タイヤの耐久性を損なうという問題
があった。Further, Japanese Patent Publication No. 3-23683 discloses that
The two-piece wire and the three-piece wire are twisted together, the two-piece wire is parallel in the longitudinal direction of the cord, and the three-piece wire is arranged at half pitches with respect to the two-piece wire in FIG. There has been proposed a steel cord having a structure in which the cords are alternately formed into a roughly umbrella shape as shown in FIG. However, in this prior art, in practice, each of the wire W 2 of the wire W 1 of 2 pcs constituting the steel cord as apparent from FIG 3 pcs are in close contact with each other,
And 2 pcs of wire W 1 and 3 for the wire W 2 of pcs are constantly in close contact with the code longitudinally closed cavities S therebetween occurs, a difficulty in the rubber penetration. Further, the wire W 1 of 2 pcs of wick or early breakage when 2 pcs of wire W 1 and 3 pcs winding length of the wire W 2 is the latter which acts for pulling force becomes large, Since the wires are in contact with each other, fretting due to repeated bending occurs in the wire W 1 and the triple wire W 2 , thereby causing wire breakage, reducing bending fatigue resistance and impairing tire durability. There was a problem.

【０００４】本発明は前記のような問題点を解消するた
めに創案されたもので、その目的とするところは、ゴム
浸透性が良好であるとともにフレッティング摩耗が抑制
され曲げ疲労性が良好で、製造も容易な５本ワイヤタイ
プのスチールコードを提供することにある。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a rubber having good permeability and suppressing fretting wear and having good bending fatigue. Another object of the present invention is to provide a five-wire type steel cord that is easy to manufacture.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するため
本発明は、２本の第１ワイヤ束と３本の第２ワイヤ束か
らなるスチールコードにおいて、第１ワイヤ束が５０ｍ
ｍ以上のねじりピッチを有し、このねじりピッチを有す
る第１ワイヤ束に、第２ワイヤ束が前記ピッチよりも小
さいピッチで、しかも第１ワイヤ束と第２ワイヤ束の間
に第１ワイヤ束１ピッチ内で１０％以上の隙間が創成さ
れるように螺旋状に巻き付けられている構成としたもの
である。According to the present invention, there is provided a steel cord comprising two first wire bundles and three second wire bundles, wherein the first wire bundle has a length of 50 m.
m, and the first wire bundle having this twist pitch has a second wire bundle with a pitch smaller than the pitch, and a first wire bundle of one pitch between the first wire bundle and the second wire bundle. It is configured to be spirally wound so that a gap of 10% or more is created therein.

【０００６】[0006]

【実施例】以下本発明の実施例を添付図面に基いて説明
する。図１と図２は本発明によるゴム補強用スチールコ
ードの一例を示しており、１は２本のワイヤ１ａ，１ａ
からなる第１ワイヤ束、２は３本のワイヤ２ａ，２ａ，
２ａからなる第２ワイヤ束であり、それらワイヤ１ａ，
２ａはそれぞれ０．１０〜０．４０ｍｍの径を有し、ゴ
ムとの接着性をよくするため、黄銅のようなメッキが施
されている。前記２本ワイヤからなる第１ワイヤ束１
は、引き揃えられた状態でほぼ５０〜４００ｍｍの範囲
のピッチＰ1でねじられており(図１では第１ワイヤ束の
ピッチを強調して描いている)、このねじられた第１ワ
イヤ束１の周りに３本ワイヤからなる第２ワイヤ束２が
規則正しく一定のピッチＰ2で螺旋状に巻き付けられて
いる。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show an example of a steel cord for rubber reinforcement according to the present invention, wherein 1 is two wires 1a, 1a.
The first wire bundle 2 is composed of three wires 2a, 2a,
2a, a second bundle of wires consisting of the wires 1a,
2a has a diameter of 0.10 to 0.40 mm, respectively, and is plated with brass or the like in order to improve adhesion to rubber. First wire bundle 1 composed of the two wires
Is (are drawn to emphasize the pitch of Figure 1, the first wire bundle) pulled collated status are twisted at a pitch P 1 in the range of approximately 50~400mm in this twisted first wire bundle three second wire bundle 2 composed of a wire is helically wound regularly at a predetermined pitch P 2 around 1.

【０００７】第２ワイヤ束２は図２のようにいずれの断
面においても略三角山状を維持し、第１ワイヤ束１と第
２ワイヤ束２との間には、図２で示すように外部に開口
した解放隙間３が形成されている。この解放隙間３は第
１ワイヤ束１の１ピッチＰ1内において１０％以上存在
することが好ましい。解放隙間３を限定したのは本発明
者が実地に試験した結果に基づく。すなわち、ワイヤ径
０.２３ｍｍ、第１ワイヤ束ねじりピッチ：５０〜４０
０ｍｍ、第２ワイヤ束巻き付けピッチ：１４ｍｍとし
て、１００本のスチールコードを試作し、それらをおの
おのゴムコンパウンド中に埋め込み、加硫してゴムブロ
ックを作り、各ゴムブロックについて空気透過量測定試
験を行った。空気透過量測定はゴムブロックから突出し
たコード下端をパイプを介して圧縮エア供給源と接続
し、ゴムブロックから突出したコード上端部をメスシリ
ンダで被って水槽に沈め、圧縮エア供給源から０.５Kgf
/cm2の圧縮エアを1分間送り、コード上端部のリークエ
ア量を見た。そして、、それらスチールコードのゴムを
除去し合成樹脂中に埋め込み固定し、第１ワイヤ束１の
１ピッチＰ1を２０等分して順次コード断面を電子顕微
鏡で観察し、第１ワイヤ束１と第２ワイヤ束２に隙間の
あるものの数をカウントし、その平均値を求めたもので
ある。良品コード(空気透過率が５%以下のスチールコー
ド)はその有隙間数が１０%を越えており、空気透過率が
5%を越える不良コードものは、有隙間断面数が１０%未
満であった。この知見から第１ワイヤ束１と第２ワイヤ
束２との間の解放隙間を１０%以上と規定したのであ
る。しかし、解放隙間率はこれがあまり大きいと低荷重
時の伸びが大きく変形しやすく、ゴムとの複合時に隙間
が閉じられたりタイヤユニフォーム性を悪くするため、
通常３５％程度にとどめるのが好ましい。As shown in FIG. 2, the second wire bundle 2 maintains a substantially triangular mountain shape in any cross section, and a space between the first wire bundle 1 and the second wire bundle 2 is provided as shown in FIG. A release gap 3 opened to the outside is formed. It is preferable that the release gap 3 is present at 10% or more within one pitch P 1 of the first wire bundle 1. The limitation of the release gap 3 is based on the results of the inventor's actual tests. That is, the wire diameter is 0.23 mm, and the first wire bundle twist pitch is 50 to 40.
Assuming 0 mm and the second wire bundle winding pitch: 14 mm, 100 steel cords were prototyped, embedded in each rubber compound, vulcanized to form rubber blocks, and an air permeability measurement test was performed for each rubber block. Was. For the measurement of the amount of air permeation, the lower end of the cord protruding from the rubber block is connected to a compressed air supply source via a pipe, the upper end of the cord protruding from the rubber block is covered with a graduated cylinder, and immersed in a water tank. 5Kgf
/ cm 2 of compressed air was sent for one minute to check the amount of leak air at the upper end of the cord. Then, the rubber of these steel cords is removed, embedded in synthetic resin and fixed, and one pitch P 1 of the first wire bundle 1 is divided into 20 equal parts, and the cord cross-section is sequentially observed with an electron microscope. And the number of gaps in the second wire bundle 2 are counted, and the average value is obtained. Non-defective cords (steel cords with air permeability of 5% or less) have more than 10% of gaps and air permeability
Defective codes exceeding 5% had less than 10% gap cross sections. Based on this finding, the release gap between the first wire bundle 1 and the second wire bundle 2 was defined as 10% or more. However, if the release gap ratio is too large, the elongation at low load tends to be greatly deformed, and when combined with rubber, the gap is closed or the tire uniformity deteriorates,
Usually, it is preferable to keep it at about 35%.

【０００８】前記第１ワイヤ束１と第２ワイヤ束２の撚
り方向は同一であってもよいし、異なる方向であっても
よい。第１ワイヤ束１のねじりピッチＰ1の下限を５０
ｍｍとしたのは、これを下回るねじりピッチでは第２ワ
イヤ束２との接点が少なくなるため解放隙間３の形成に
は有効であるが、ねじり度合いが強くなりすぎるため、
曲げ疲労性が低下する危険があるからである。しかし、
ねじりピッチＰ1が４００ｍｍ以上では曲げ疲労性の低
下はさけられるもののワイヤ束同士の交差角度が小さく
なり、接点が増すため解放隙間３の形成度合いが減少
し、第１ワイヤ束１の１ピッチ内での解放隙間３が１０
％未満となりやすいため、４００ｍｍを上限としたもの
である。第１ワイヤ束１のねじりピッチＰ1はゴム浸透
性、引張り強度および疲労性のバランスの面から好適に
は約１００〜２５０ｍｍである。第２ワイヤ束２のピッ
チＰ2は第１ワイヤ束１のピッチＰ1よりもはるかに小さ
く、一般的にピッチ比（Ｐ2／Ｐ1）は０．０２５〜０.
３５が適当である。その理由はピッチ比が０．０２５未
満ではゴム浸透性が悪くなり、０．３５を越えると撚り
経りによる引張り強度低下が起きるからである。The twisting directions of the first wire bundle 1 and the second wire bundle 2 may be the same or different. A first lower limit of the twist pitch P 1 of the wire bundle 1 50
mm is effective for forming the release gap 3 because the contact pitch with the second wire bundle 2 is reduced at a twist pitch smaller than this, but the twist degree becomes too strong.
This is because there is a risk that the bending fatigue property is reduced. But,
Twist pitch P 1 is smaller intersection angle of the wire bundle between those avoids the reduction in bending fatigue resistance in 400mm or more, reduces the formation degree of liberation gap 3 to increase the contact, the first wire bundle 1 in one pitch Release gap 3 is 10
%, The upper limit is 400 mm. Pitch P 1 twist of the first wire bundle 1 are rubber penetration, preferably in terms of tensile strength and fatigue resistance of the balance is about 100 to 250 mm. Pitch P 2 of the second wire bundle 2 is much smaller than the pitch P 1 of the first wire bundle 1, generally pitch ratio (P 2 / P 1) is 0.025 to 0.
35 is appropriate. The reason is that if the pitch ratio is less than 0.025, the rubber permeability deteriorates, and if it exceeds 0.35, the tensile strength decreases due to twisting.

【０００９】なお、２本組のワイヤを平行としあるいは
３００ｍｍ〜１０００ｍｍといった大きなねじりピッチ
を与え、これに２本組のワイヤを螺旋状に巻き付けるこ
とも考えられるが、この場合には４本のワイヤが密接し
て断面四角形状を呈するように集まった束となりやすい
ため、ゴム浸透性が悪く、フレッティングが生じやす
く、本発明のような特徴は得られない。[0009] It is conceivable to make the two sets of wires parallel or to give a large torsion pitch of 300 mm to 1000 mm and wrap the two sets of wires spirally. In this case, four wires are used. Are close to each other and tend to form a bundle having a quadrangular cross-section, so that rubber permeability is poor, fretting is likely to occur, and the characteristics of the present invention cannot be obtained.

【００１０】図３は本発明によるスチールコードを得る
装置と方法の一例を示し、基台に回転可能に立設された
縦軸７と、この縦軸の上端から縦軸と平行に伸び垂直軸
線の回りを回転自在なねじり用アーム８とを備えた第１
撚線機Ａと、入口側に水平軸Ｏ−Ｏの周りで同一方向，
同一速度で回転するガイドローラ５ａ，５ｂを、出口側
にガイドローラ５ｃ，５ｄを有し、それらガイドローラ
の間に弧状の一対の回転ガイド６ａ，６ｂを具備したイ
ン−アウトバンチャー式の第２撚線機Ｂを直列に配して
いる。前記第１撚線機Ａの縦軸７には２つのスプール
９，９が取り付けられ、それらスプール９，９に第１ワ
イヤ束１のためのワイヤ１ａ，１ａがそれぞれ巻回され
ている。それらワイヤ１ａ，１ａはスプール９，９から
引き出され、ねじり用アーム８に設けたガイドローラ８
０，８０を経由して引きそろえられ、ねじり用アーム８
の回転中心すなわち縦軸上端付近の送り出しローラ８１
を介して第２撚線機Ｂの入口に導かれるようになってい
る。また、第２撚線機Ｂの回転ガイド６ａ，６ｂで囲ま
れた領域には非回転固定のホルダ(図示せず)に、第２ワ
イヤ束２のための３本のワイヤ２ａ，２ａ，２ａをそれ
ぞれ巻収した３つのボビン１０ａ〜１０ｃが取付けら
れ、またこれらボビン１０ａ〜１０ｃの下流側水平軸Ｏ
−Ｏ上に、孔付きガイド板１１と、ワイヤ束の軸線の回
りの回転を許容しない締めダイ１２を配している。ボビ
ン１０ａ〜１０ｃは水平軸Ｏ−Ｏから変位した位置に並
列上に配置されるか、あるいは前記水平軸Ｏ−Ｏを囲む
位置に間隔的に配置されている。FIG. 3 shows an example of an apparatus and a method for obtaining a steel cord according to the present invention, in which a vertical axis 7 rotatably erected on a base and a vertical axis extending parallel to the vertical axis from the upper end of the vertical axis. And a torsion arm 8 rotatable around the
The same direction around the horizontal axis OO on the inlet side as the twisting machine A,
A guide roller 5a, 5b rotating at the same speed, a guide roller 5c, 5d on the outlet side, and an in-out buncher type second having an arc-shaped pair of rotary guides 6a, 6b between the guide rollers. The twisting machine B is arranged in series. Two spools 9, 9 are mounted on the longitudinal axis 7 of the first twisting machine A, and wires 1 a for the first wire bundle 1 are wound around the spools 9, 9, respectively. These wires 1a, 1a are pulled out from spools 9, 9, and are provided on guide rollers 8 provided on a torsion arm 8.
0,80, and the torsion arm 8
Center of rotation of the feed roller 81
Through to the entrance of the second twisting machine B. In a region surrounded by the rotation guides 6a and 6b of the second twisting machine B, three wires 2a, 2a, 2a for the second wire bundle 2 are placed in a non-rotationally fixed holder (not shown). Are mounted, and the horizontal axis O downstream of the bobbins 10a to 10c is attached to the bobbins 10a to 10c.
On -O, a guide plate 11 with holes and a clamping die 12 which does not allow rotation around the axis of the wire bundle are arranged. The bobbins 10a to 10c are arranged in parallel at positions displaced from the horizontal axis OO, or are spaced at positions surrounding the horizontal axis OO.

【００１１】第１撚線機Ａのねじり用アーム８が回転す
ると、縦軸７の２つのスプール９，９から２本のワイヤ
１ａ，１ａが引き出され、該ワイヤは束の状態で送り出
しローラ８１に達するまでの間にねじり用アーム８の１
回転で大きなピッチの１回ねじり(例えばＳ方向)が与え
られる。このねじりピッチはスプール９，９を縦軸７の
回りで回転させることにより５０ｍｍ〜４００ｍｍに調
整することができる。前記のように１回ねじりを与えら
れた２本ワイヤ１ａ，１ａは、送り出しローラ８１から
第２撚線機Ｂの入口側ガイドローラ５ａと弧状の回転ガ
イド６ａを経て出口側ガイドローラ５ｃを経由し、孔付
きガイド板１１の孔を通って締めダイ１２に導かれる。
これにより１回ねじりを与えられた２本ワイヤ１ａ，１
ａは出口側ガイドローラ５ｃ間で２回目のねじり(例え
ばＳ方向)が入れられる。この２回目のねじりは第２ワ
イヤ束２のピッチに対応するピッチであり、出口側ガイ
ドローラ５ｃから締めダイ１２の間で強力となる。一
方、第２撚線機Ｂ内ではボビン１０ａ〜１０ｃから３本
のワイヤ２ａ，２ｂ，２ｃが繰り出され、それら３本の
ワイヤは孔付きガイド板１１の孔で集合させられ締めダ
イ１２に導かれることにより前記ねじれ状態の２本のワ
イヤ１ａ，１ａに添接され、この状態で全部のワイヤは
締めダイ１２を通過して入口側ガイドローラ５ｂを経由
し弧状の回転ガイド６ｂを経て出口側ガイドローラ５ｄ
に到る。この間に全部のワイヤ１ａ，１ａ，２ａ，２
ａ，２ａは第２ワイヤ束のための短ピッチＰ2でかつ前
記入口側ガイドローラ５ｂと弧状の回転ガイド６ｂ間で
の撚り方向と逆方向(例えばＺ方向）に撚り合わされ
る。これにより前段で２回ねじりされた２本のワイヤ１
ａ，１ａは逆方向のねじりを受けるため前段のねじりが
戻され、大きなねじれピッチＰ1の第１ワイヤ束１とな
り、その周りを３本のワイヤがＺ方向にスパイラル状に
巻き付けられた第２ワイヤ束２が囲むことになり、こう
したてできあがった本発明コード４は出口側ガイドロー
ラ５ｄを経て外部の巻取りリール１３に巻収される。こ
の例ではコードの撚り方向はＳＺとなる。When the torsion arm 8 of the first twisting machine A rotates, two wires 1a, 1a are pulled out from the two spools 9, 9 on the vertical axis 7, and the wires are fed in a bundle state to a feed roller 81. Of the torsion arm 8 until it reaches
The rotation gives a single twist of a large pitch (for example, in the S direction). This twist pitch can be adjusted to 50 mm to 400 mm by rotating the spools 9 around the longitudinal axis 7. The two wires 1a, 1a which have been twisted once as described above pass from the delivery roller 81 via the inlet side guide roller 5a of the second twisting machine B, the arc-shaped rotary guide 6a, and the outlet side guide roller 5c. Then, it is guided to the fastening die 12 through the hole of the holed guide plate 11.
Thereby, the two wires 1a, 1 twisted once are given.
In a, a second twist (for example, the S direction) is inserted between the outlet side guide rollers 5c. The second twist is a pitch corresponding to the pitch of the second wire bundle 2, and becomes strong between the exit side guide roller 5 c and the tightening die 12. On the other hand, in the second twisting machine B, three wires 2a, 2b, 2c are fed from the bobbins 10a to 10c, and these three wires are gathered by the holes of the perforated guide plate 11 and guided to the clamping die 12. As a result, the two wires 1a, 1a in the twisted state are attached to each other. In this state, all the wires pass through the fastening die 12, pass through the entrance side guide roller 5b, pass through the arcuate rotary guide 6b, and exit side. Guide roller 5d
To reach. During this time, all the wires 1a, 1a, 2a, 2
a, 2a are twisted short pitch P 2 a and the inlet side guide roller 5b and arcuate rotation guide between 6b lay direction opposite to the direction for the second wire bundle (for example, Z-direction). Thereby, the two wires 1 twisted twice in the former stage
The first and second wires a and 1a are twisted in the opposite direction, so that the previous twist is returned to form a first wire bundle 1 with a large twist pitch P1, around which three wires are spirally wound in the Z direction. The wire bundle 2 is surrounded, and the thus-prepared cord 4 of the present invention is taken up on an external take-up reel 13 via an exit-side guide roller 5d. In this example, the twist direction of the cord is SZ.

【００１２】なお、第２撚線機Ｂでの撚り方向を前段で
Ｚ方向、後段でＳ方向にしてもよく、この場合は、第１
撚線機Ａでのねじり方向をＳとしておくと、第１ワイヤ
束１のワイヤ１ａ，１ａ(Ｓ方向のねじり)は第２撚線機
Ｂの前段でＺ方向小ピッチＰ2撚りが加えられるため、
Ｚ方向に過剰ねじり戻しされ、そして後段でＳ方向小ピ
ッチＰ2よりが与えられるため、Ｚ方向の過剰ねじり戻
しが解消され、大きなピッチＰ1のＳ方向ねじれ状態と
なる。したがって、この場合のコード撚り方向はＳＳと
なる。第１撚線機Ａのねじり用アーム８の回転方向は２
本のワイヤ１Ａ，１ＡにＳ方向ねじれを与える方向で
も、Ｚ方向ねじれを与える方向のいずれでもよく、後者
の場合で、第２撚線機Ｂでの第１段撚り方向がＺ方向、
第２段がＳ方向であれば、得られるコードの撚り方向は
ＺＳとなる。The twisting direction in the second twisting machine B may be the Z direction in the first stage and the S direction in the second stage.
When the twisting direction in the stranding machine A keep is S, the first wire bundle 1 of wires 1a, (twist S direction) 1a is the Z direction small pitch P 2 twisted in front of the second stranding machine B is added For,
Is excessively twist back in the Z direction, and since given a more S direction small pitch P 2 at a later stage, the torsional return excess Z-direction is eliminated, the S direction twist state of a large pitch P 1. Therefore, the cord twist direction in this case is SS. The rotation direction of the torsion arm 8 of the first twisting machine A is 2
The direction in which the wires 1A, 1A are twisted in the S direction and the direction in which the wires are twisted in the Z direction may be either. In the latter case, the first-stage twisting direction in the second twisting machine B is the Z direction,
If the second stage is in the S direction, the twist direction of the obtained cord is ZS.

【００１３】次に本発明の実施データを従来品とともに
示すと下記表１の通りである。Next, the following Table 1 shows the practical data of the present invention together with the conventional product.

【００１４】[0014]

【表１】 [Table 1]

【００１５】この表１中の空気透過率は前記した空気透
過試験法による値であり、また疲労特性は３ロール試験
によるデータすなわち、スチールコードをゴムコンパウ
ンドに埋め込み加硫したサンプルコードの一端を固定
し、他端をコード破断荷重の１０％の重量の錘に接続し
た状態で、３個１組のロール(各々直径1インチ)を同時
水平往復移動させることより繰返し引張り・圧縮曲げ荷
重を付与する方法である。なお比較の精度を高めるた
め、本発明品、従来品、比較品とも引張り強さは一定と
した。表１から明らかなように、２本ワイヤからなる第
１ワイヤ束にねじりピッチ５０〜４００ｍｍを形成し、
その回りに３本ワイヤからなる第２ワイヤ束をピッチ比
(P2/P1)０．２５〜０．３５の範囲内にしてスパイラル
状に巻回したものは、第１ワイヤ束の１ピッチ内に１０
％以上の解放隙間が創成されるため、ゴム浸透性が良好
であり、またワイヤ同士のこすれが抑制されるためフレ
ッティングが改善され、疲労性も良好である。第１ワイ
ヤ束のねじりピッチを５０ｍｍを下回る値にした場合は
ゴム浸透性は良好であるが、撚り減りのため引張り強度
が低下する。第１ワイヤ束のねじりピッチを５００ｍｍ
を越える大きなものにした場合には、引張り強度は良好
であるが、解放隙間率が低減するためゴム浸透性が低下
している。The air permeability in Table 1 is a value obtained by the air permeability test method described above, and the fatigue characteristics are data obtained by a three-roll test, that is, one end of a sample cord obtained by embedding a steel cord in a rubber compound and vulcanizing the steel cord is fixed. Then, with the other end connected to a weight having a weight of 10% of the cord breaking load, a set of three rolls (each having a diameter of 1 inch) is simultaneously horizontally reciprocated to apply a tensile / compressive bending load repeatedly. Is the way. In order to increase the accuracy of comparison, the tensile strength of the product of the present invention, the conventional product, and the comparative product was kept constant. As is clear from Table 1, a twist pitch of 50 to 400 mm is formed in the first wire bundle made of two wires,
Around the second wire bundle consisting of three wires, pitch ratio
(P 2 / P 1 ) A spirally wound wire in the range of 0.25 to 0.35 has 10 wires in one pitch of the first wire bundle.
% Or more of the release gap is created, so that the rubber permeability is good, and rubbing between the wires is suppressed, so that fretting is improved and the fatigue property is also good. When the twist pitch of the first wire bundle is set to a value less than 50 mm, the rubber permeability is good, but the tensile strength is reduced due to a decrease in twist. The torsion pitch of the first wire bundle is 500 mm
When the tensile strength is larger than the above, the tensile strength is good, but the open space ratio is reduced, so that the rubber permeability is reduced.

【００１６】[0016]

【発明の効果】以上説明した本発明によるときには、５
本ワイヤタイプのスチールコードにおいて、ゴム浸透性
が良好であるとともにフレッティング摩耗が抑制され曲
げ疲労性が良好でしかも製造も容易で１工程で連続的に
製造することができるというすぐれた効果が得られる。According to the present invention described above, 5
This wire type steel cord has an excellent effect that it has good rubber permeability, suppresses fretting wear, has good bending fatigue properties, is easy to manufacture, and can be manufactured continuously in one process. Can be

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明によるゴム補強用スチールコードの一実
施例を示す側面図である。FIG. 1 is a side view showing an embodiment of a steel cord for rubber reinforcement according to the present invention.

【図２】図１のスチールコードの各部の断面図である。FIG. 2 is a sectional view of each part of the steel cord of FIG. 1;

【図３】本発明のスチールコードの製造装置の一例を示
す側面図である。FIG. 3 is a side view showing an example of a steel cord manufacturing apparatus according to the present invention.

【図４】従来のスチールコードの断面図である。FIG. 4 is a sectional view of a conventional steel cord.

【図５】従来のスチールコードの断面図である。FIG. 5 is a sectional view of a conventional steel cord.

【符号の説明】[Explanation of symbols]

１ 第１ワイヤ束 ２ 第２ワイヤ束 ３ 解放隙間 Ｐ1 第１ワイヤ束のねじりピッチ Ｐ2 第２ワイヤ束の撚りピッチ1 the first wire bundle 2 second wire bundle 3 release clearance P 1 first twist pitch of twist pitch P 2 second wire bundle of the wire bundle

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) D07B 1/00 - 1/22 B60C 9/00 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) D07B 1/00-1/22 B60C 9/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】２本の第１ワイヤ束と３本の第２ワイヤ束
からなるスチールコードにおいて、第１ワイヤ束が５０
ｍｍ以上のねじりピッチを有し、このねじりピッチを有
する第１ワイヤ束に、第２ワイヤ束が前記ピッチよりも
小さいピッチで、しかも第１ワイヤ束と第２ワイヤ束の
間に第１ワイヤ束１ピッチ内で１０％以上の隙間が創成
されるように螺旋状に巻き付けられていることを特徴と
するゴム補強用スチールコード。1. A steel cord comprising two first wire bundles and three second wire bundles, wherein the first wire bundle is 50
mm or more, and the first wire bundle having the twist pitch has a pitch of the first wire bundle of 1 pitch between the first wire bundle and the second wire bundle. A steel cord for rubber reinforcement, which is spirally wound so that a gap of 10% or more is created in the steel cord. 【請求項２】第１ワイヤ束と第２ワイヤ束のワイヤが同
一径であり、第２ワイヤ束の巻き付けピッチＰ2と第１
ワイヤ束のねじりピッチＰ1の比(P2/P1)が０.０２５〜
０.３５である請求項１に記載のゴム補強用スチールコ
ード。Wherein a wire is the same diameter of the first wire bundle and the second wire bundle, the pitch P 2 and the first winding of the second wire bundle
The ratio of the twist pitch P 1 of the wire bundle (P 2 / P 1) is 0.025
2. The steel cord for rubber reinforcement according to claim 1, which has a diameter of 0.35.
JP29594793A 1993-11-02 1993-11-02 Steel cord for rubber reinforcement Expired - Fee Related JP3174803B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29594793A JP3174803B2 (en) 1993-11-02 1993-11-02 Steel cord for rubber reinforcement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29594793A JP3174803B2 (en) 1993-11-02 1993-11-02 Steel cord for rubber reinforcement

Publications (2)

Publication Number Publication Date
JPH07126992A JPH07126992A (en) 1995-05-16
JP3174803B2 true JP3174803B2 (en) 2001-06-11

Family

ID=17827169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29594793A Expired - Fee Related JP3174803B2 (en) 1993-11-02 1993-11-02 Steel cord for rubber reinforcement

Country Status (1)

Country Link
JP (1) JP3174803B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596937B2 (en) 2004-04-08 2009-10-06 Sumitomo (Sei) Steel Wire Corp. Rubber product-reinforcing metallic cord and method for manufacturing such a cord

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4904912B2 (en) * 2006-05-12 2012-03-28 横浜ゴム株式会社 Steel cord for rubber reinforcement and pneumatic radial tire using the same
BR112013024359A2 (en) 2011-03-24 2017-09-26 Bridgestone Corp steel cord for reinforcement of rubber and radial pneumatic article using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596937B2 (en) 2004-04-08 2009-10-06 Sumitomo (Sei) Steel Wire Corp. Rubber product-reinforcing metallic cord and method for manufacturing such a cord

Also Published As

Publication number Publication date
JPH07126992A (en) 1995-05-16

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