JPH0741779B2 - Bead wire - Google Patents
Bead wireInfo
- Publication number
- JPH0741779B2 JPH0741779B2 JP63100624A JP10062488A JPH0741779B2 JP H0741779 B2 JPH0741779 B2 JP H0741779B2 JP 63100624 A JP63100624 A JP 63100624A JP 10062488 A JP10062488 A JP 10062488A JP H0741779 B2 JPH0741779 B2 JP H0741779B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- bead wire
- bead
- steel wire
- tire
- 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
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2048—Cores characterised by their cross-sectional shape
- D07B2201/2049—Cores characterised by their cross-sectional shape having protrusions extending radially functioning as spacer between strands or 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
- D07B2201/2047—Cores
- D07B2201/2052—Cores characterised by their structure
- D07B2201/2059—Cores characterised by their structure comprising 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
- D07B2201/2047—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
- D07B2205/305—Steel characterised by the carbon content having a low carbon content, e.g. below 0,5 percent respectively NT wires
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tire cords
- D07B2501/2053—Tire cords for wheel rim attachment
Landscapes
- Tires In General (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] この発明はタイヤ用のビードワイヤーに関するものであ
る。TECHNICAL FIELD The present invention relates to a bead wire for a tire.
[従来の技術および発明が解決しようとする課題] タイヤの内圧を保つための強度メンバーであるカーカス
を形成する繊維や鋼線のコードの端を巻きつけ固定する
とともに、タイヤの内周の寸度を規定してリムとのはめ
合いを確保する重要なタイヤ材料であるビードワイヤー
は、(1)四角形断面のストランドビードワイヤー、
(2)六角形断面の1本線ビードワイヤー、(3)円形
断面のケーブルビードワイヤーの3種類に分類される。[Problems to be Solved by the Prior Art and Invention] The ends of the cords of the fiber or steel wire forming the carcass, which is a strength member for maintaining the inner pressure of the tire, are wound around and fixed, and the dimension of the inner circumference of the tire is fixed. The bead wire, which is an important tire material for securing the fit with the rim, is (1) a strand bead wire having a rectangular cross section,
It is classified into three types: (2) single wire bead wire having a hexagonal cross section and (3) cable bead wire having a circular cross section.
四角形断面のストランドビードワイヤーは複数本の鋼線
を並列に並べてゴム被覆し、その鋼線帯を積層巻回した
ビードワイヤーであり、六角形断面の1本線ビードワイ
ヤーは1本の鋼線にゴム被覆し、その鋼線の並列巻回お
よび積層巻回を連続して行い、俵積み状にしたビードワ
イヤーであり、円形断面のケーブルビードワイヤーは無
端の金属線の周面に別の鋼線を螺旋巻回したビードワイ
ヤーである。A quadrangular strand bead wire is a bead wire in which a plurality of steel wires are arranged in parallel and covered with rubber, and the steel wire strips are laminated and wound. A hexagonal cross section single wire bead wire is made of rubber on one steel wire. It is a bead wire that is covered and continuously wound in parallel and in layers to form a bales, and a cable bead wire with a circular cross section has another steel wire on the peripheral surface of an endless metal wire. It is a spirally wound bead wire.
四角形断面のストランドビードワイヤーはタイヤカーカ
スに埋込まれて成型加硫されるときに断面形状がゆがめ
られ易いという欠点があり、バイアスタイヤではそれで
も使用できたが、ラジアルタイヤにおいては不都合とな
り有用ではなくなってきた。タイヤの成型加硫時に断面
形状が変りにくい六角断面のビードワイヤーがその後登
場したがいわゆる15度テーパーという低い形状の或る種
のトラック用タイヤには有用であったが、一般的に鋼線
が平行配列されたビードワイヤーにおいては完成タイヤ
に利用される有効強度はワイヤーの固有の強度の約40%
程度である。The quadrangular cross-section strand bead wire has the drawback that the cross-sectional shape is easily distorted when it is embedded in a tire carcass and molded and vulcanized, and it could still be used in bias tires, but it becomes inconvenient and not useful in radial tires. Came. A hexagonal bead wire whose cross-sectional shape was difficult to change during molding and vulcanization of the tire was introduced later, but it was useful for some truck tires with a low shape of so-called 15 degree taper, but generally steel wire is With bead wires arranged in parallel, the effective strength used for the finished tire is about 40% of the inherent strength of the wire.
It is a degree.
同じ断面形状を保ちつづけられるような、そして、でき
れば全体として円形断面のビードワイヤーが理想的であ
る。特にオールスチールラジアルタイヤのようにカーカ
スにスチールコードを用いるタイヤでは円形断面のビー
ドワイヤーが最適である。円形断面のケーブルビードワ
イヤー登場の所以である。Ideally, a bead wire that can maintain the same cross-sectional shape and, if possible, has a generally circular cross-section. In particular, a bead wire having a circular cross section is optimal for a tire using a steel cord for a carcass such as an all-steel radial tire. This is the reason why the cable bead wire with a circular cross section appeared.
長さ方向に対して同一断面形状を有する円形断面(矩形
断面など円形断面以外の断面形状のものも一部ある。)
の低又は中炭素鋼の線をリング状にしてバット溶接した
芯金のまわりに、高炭素鋼線を螺旋巻回密接配置して構
成したケーブルビードワイヤーは材料強度の75%程度が
役立たされることを可能にした。このケーブルビードワ
イヤーはタイヤの成型加硫時のカーカスコードの変位に
対しコードと螺旋巻回の高炭素鋼線の間および螺旋巻回
の高炭素鋼線と芯金の間で滑り運動ができやすく、従っ
て断面形状を保ちつづけることを可能にしたが、密接し
て螺旋巻回された円形断面の高炭素鋼線がゴム被覆なし
に円形断面の芯金に線接触状態で密接配置されているこ
とにより螺旋巻回線と芯金との間に略三角形状の空隙が
介在するとともに、金属と金属の摩擦熱により錆発生や
ゴムとの接着力低下という新しい問題点が生じてきた。
さらには、タイヤのビード部からサイドウォールに続く
部分を薄くしたいという要求があるが、ケーブルビード
ワイヤーの全体径は芯金及び高炭素鋼線の実径の和とな
って全体径を小さくすることができず、結果として前記
部分を薄くすることの支障になった。A circular cross-section having the same cross-sectional shape in the length direction (some cross-sectional shapes such as rectangular cross-sections are not circular)
75% of the material strength of the cable bead wire, which is constructed by closely arranging the high carbon steel wire in spiral winding around the core metal of butt-welding the low or medium carbon steel wire in a ring shape, is useful. Made it possible. This cable bead wire facilitates sliding motion between the cord and the spirally wound high carbon steel wire and between the spirally wound high carbon steel wire and the core metal against displacement of the carcass cord during tire molding vulcanization. , Therefore, it is possible to keep the cross-sectional shape, but the high-carbon steel wire of circular cross section closely wound spirally is closely arranged in line contact with the core metal of circular cross section without rubber coating. As a result, a new triangular void is formed between the spiral winding line and the core metal, and new problems such as rust generation and a reduction in adhesive strength with rubber have arisen due to frictional heat between metals.
Furthermore, there is a demand to make the portion from the bead of the tire to the sidewall thinner, but the overall diameter of the cable bead wire should be the sum of the actual diameters of the core metal and high carbon steel wire to reduce the overall diameter. Could not be obtained, and as a result, it became difficult to thin the portion.
この発明の目的は、前記従来構成における欠陥を解消す
るためになされたものであって、螺旋巻回の高炭素鋼線
と芯金とを面接触状態に配置し、螺旋巻回の高炭素鋼線
相互間を非接触にできるケーブルビードワイヤーを提供
することにある。The object of the present invention is to eliminate the defects in the above-mentioned conventional structure, in which a spirally wound high carbon steel wire and a core metal are arranged in surface contact with each other, and the spirally wound high carbon steel is arranged. It is to provide a cable bead wire that can make the wires non-contact with each other.
[問題点を解決するための手段] この発明は前記問題点を解決するために、環状をなす芯
金の周面に所定の捩れ角をもって周回連続するように断
面円弧状をなす無端状凹溝を螺旋形成し、該凹溝内に無
端状をなす硬鋼線を螺旋巻回するという手段をとってい
る。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has an endless groove having an arcuate cross-section so as to be circumferentially continuous with a predetermined twist angle on the peripheral surface of an annular core metal. Is formed into a spiral shape, and an endless hard steel wire is spirally wound in the concave groove.
[作用] 従って、この発明では芯金と硬鋼線は面接触しており両
者間に滑り現象は発生せず、又、螺旋形成された無端状
凹溝内への螺旋巻回構成にて硬鋼線は芯金に対して一体
的に拘束される。さらに、硬鋼線相互間に隙間を保持す
ることができるとともに、金属と金属の摩擦の発生は皆
無である。又、硬鋼線が凹溝内に位置しているので、ビ
ードワイヤーの全体径を小さくすることができる。[Operation] Therefore, in the present invention, the cored bar and the hard steel wire are in surface contact with each other so that a slip phenomenon does not occur between the cored bar and the hard steel wire, and the structure is hard by the spiral winding configuration in the spirally formed endless groove. The steel wire is restrained integrally with the core metal. Further, a gap can be maintained between the hard steel wires, and friction between the metals is not generated at all. Further, since the hard steel wire is located in the groove, the overall diameter of the bead wire can be reduced.
[実施例] 以下、この発明を具体化した一実施例を図面に従って説
明する。外周に0.695Rの凹溝10が45度おきに8本設けら
れた低炭素鋼線が環状にされ、バット溶接されて芯金2
が形成されている。凹溝10はリード長さ170.84、捩れ角
3゜、捩れ方向左の捩れダイスに依り加工されており、
芯金1周を8ターン(1ターンは芯金直径を1周する意
味)して45゜離れた隣接の溝を形成するように設計され
ている。これが連続8周して1本の凹溝10が図面の断面
位置において見かけ上8条形成されている。硬鋼線とし
ての1.39φの高炭素鋼の1本の螺旋巻回線11は芯金2の
凹溝10内に密接して配置されており、凹溝10と螺旋巻回
線11外周は同じ曲率をなして相互に面接触している。螺
旋巻回線11それぞれの間には隙間3が設けられている。
なお、はタイヤビードトー、5はビードヒール、6はコ
ードを示す。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. Eight low carbon steel wires with 0.695R recessed grooves 10 provided at 45 ° intervals on the outer circumference are formed into an annular shape and butt welded to form a core metal 2.
Are formed. The groove 10 has a lead length of 170.84, a twist angle of 3 °, and is processed by a twist die on the left side of the twist direction.
It is designed so that one turn of the metal core makes eight turns (one turn means one turn of the diameter of the metal core) to form adjacent grooves separated by 45 °. This continuously makes eight rounds and one groove 10 is apparently formed in eight lines at the cross-section position in the drawing. One 1.39φ high-carbon steel spiral winding line 11 as a hard steel wire is closely arranged in the concave groove 10 of the core metal 2, and the concave groove 10 and the outer periphery of the spiral winding line 11 have the same curvature. However, they are in surface contact with each other. A gap 3 is provided between each spiral winding line 11.
In addition, is a tire bead toe, 5 is a bead heel, and 6 is a code.
螺旋巻回線の巻回状況をより理解し易く説明すると、芯
金2のバット溶接部の一つの凹溝10の一点を起点として
高炭素鋼の螺旋巻回線11が凹溝10に密接しながら左捩れ
で芯金2の周りを8ターンしてバット溶接部に到達し、
隣りの凹溝10に密接しながら左捩れで芯金2の周りを8
ターンしてバット溶接部に到達する。この巻回を繰りか
えしながら64回の螺旋巻回を終ると高炭素鋼の螺旋巻回
線11の一端はバット溶接部で他端と同一螺旋軌道上で対
向し従来公知の方法(例えば螺旋巻回線11の両端を接続
パイプに挿入してその両端を接続パイプで接続する)で
固定されて本発明のビードワイヤー1が得られる。隙間
3は環体1の外周面にゴムカバーを施すことにより又は
接着剤を塗布することによりタイヤ成型加硫時にゴムが
充填される。To explain the winding state of the spiral winding line more easily, the spiral winding line 11 made of high carbon steel starts from one point of the concave groove 10 of the butt weld portion of the core metal 2 as the starting point, and is closely contacted with the concave groove 10 on the left side. Twist around the core metal 2 for 8 turns to reach the butt weld,
While closely contacting the adjacent groove 10, twist leftward to move around the core metal 8
Turn to reach the butt weld. When 64 spiral windings are completed while repeating this winding, one end of the high-carbon steel spiral winding line 11 faces the other end on the same spiral orbit at the butt weld portion, and a conventionally known method (for example, the spiral winding line 11). Both ends are inserted into a connection pipe and both ends are connected with a connection pipe), and the bead wire 1 of the present invention is obtained. The gap 3 is filled with rubber by applying a rubber cover to the outer peripheral surface of the ring body 1 or by applying an adhesive when the tire is molded and vulcanized.
なお、前記実施例では凹溝10は1条であるが、多条にし
てもよい。ただし、多条の場合は複数本の螺旋巻回線が
必要となる。In addition, although the concave groove 10 has one line in the above-described embodiment, it may have a plurality of lines. However, in the case of multiple lines, multiple spiral winding lines are required.
発明の効果 以上詳述したように、この発明によれば芯金と硬鋼線は
螺旋形成された無端状凹溝内で密接に円弧面接触しつつ
相互に所定の拘束力でもって一体化されているので外部
負荷によって滑り運動をすることはない。従って、硬鋼
線間の外方へ開放する隙間が保持されて、硬鋼線相互間
はゴム層を介在させて隣接することになり、空気溜りが
無いのは勿論のこと金属摩擦の心配は皆無であり、従来
のケーブルビードワイヤーの摩擦発熱等に基づく錆発
生、ゴムとの接着力低下等の問題点を全面的に解決する
ことができた。又、硬鋼線は凹溝の深さ分だけ芯金の中
心側に位置しているので、ビードワイヤーの全体径を小
さくしてタイヤビード部およびダイヤビード部からサイ
ドウォールに続く部分を薄くすることに寄与できる。な
お、硬鋼線間に隙間を設けてその硬鋼線を配するときに
は、その隙間の幅の大小により硬鋼線の本数又は太さを
規定でき、ビードワイヤーの強度の選択の幅が広くなる
ことは容易に理解されるところである。EFFECTS OF THE INVENTION As described in detail above, according to the present invention, the cored bar and the hard steel wire are in close contact with each other in the spirally formed endless groove while being integrated with each other with a predetermined binding force. Therefore, there is no sliding motion due to external load. Therefore, the open gap between the hard steel wires is maintained, and the hard steel wires are adjacent to each other with the rubber layer interposed therebetween. There is no air pocket and there is no concern about metal friction. There was nothing, and it was possible to completely solve the problems such as the generation of rust due to the frictional heat generation of the conventional cable bead wire and the reduction of the adhesive force with rubber. Also, since the hard steel wire is located on the center side of the core metal by the depth of the groove, the overall diameter of the bead wire is reduced to thin the portion from the tire bead and diamond bead to the sidewall. Can contribute to When arranging the hard steel wires with a gap between the hard steel wires, the number or thickness of the hard steel wires can be regulated by the size of the width of the gap, and the range of selection of the strength of the bead wire is widened. This is easily understood.
【図面の簡単な説明】 図はこの発明を具体化したビードワイヤーの断面図であ
る。 2……芯金、10……凹溝、11……硬鋼線としての螺旋巻
回線。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a bead wire embodying the present invention. 2 ... Core bar, 10 ... Recessed groove, 11 ... Spiral winding line as hard steel wire.
Claims (1)
角をもって周回連続するように断面円弧状をなす無端状
凹溝(10)を螺旋形状し、該凹溝(10)内に無端状をな
す硬鋼線(11)を螺旋巻回したことを特徴とするビード
ワイヤー。1. An endless groove (10) having an arcuate cross-section is spirally formed on the peripheral surface of an annular core metal (2) so as to be continuous with a predetermined twist angle, and the groove (10) is formed. A bead wire characterized by spirally winding an endless hard steel wire (11).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63100624A JPH0741779B2 (en) | 1988-04-22 | 1988-04-22 | Bead wire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63100624A JPH0741779B2 (en) | 1988-04-22 | 1988-04-22 | Bead wire |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01273707A JPH01273707A (en) | 1989-11-01 |
JPH0741779B2 true JPH0741779B2 (en) | 1995-05-10 |
Family
ID=14278990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63100624A Expired - Lifetime JPH0741779B2 (en) | 1988-04-22 | 1988-04-22 | Bead wire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0741779B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0748406Y2 (en) * | 1991-03-04 | 1995-11-08 | 不二精工株式会社 | Bead wire |
US6571847B1 (en) * | 2002-01-24 | 2003-06-03 | The Goodyear Tire & Rubber Company | Light weight alloy bead core |
KR20070043812A (en) | 2004-07-05 | 2007-04-25 | 스미토모 덴코 스틸 와이어 가부시키가이샤 | Annular concentrically twisted bead cord |
JP4040067B2 (en) * | 2005-06-01 | 2008-01-30 | 住友電工スチールワイヤー株式会社 | Annular concentric stranded bead cord and method for manufacturing the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2299169A1 (en) * | 1975-01-29 | 1976-08-27 | Michelin & Cie | IMPROVEMENTS TO TIRE WRAP RODS |
-
1988
- 1988-04-22 JP JP63100624A patent/JPH0741779B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01273707A (en) | 1989-11-01 |
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