JPH06158565A - Steel wire for reinforcement of tire - Google Patents
Steel wire for reinforcement of tireInfo
- Publication number
- JPH06158565A JPH06158565A JP43A JP30683592A JPH06158565A JP H06158565 A JPH06158565 A JP H06158565A JP 43 A JP43 A JP 43A JP 30683592 A JP30683592 A JP 30683592A JP H06158565 A JPH06158565 A JP H06158565A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- wire
- steel wire
- habit
- rigidity
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 230000002787 reinforcement Effects 0.000 title claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 238000005096 rolling process Methods 0.000 abstract description 4
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005491 wire drawing Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 11
- 239000012779 reinforcing material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- D07B1/0646—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
- 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
-
- 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
- D07B2201/2001—Wires or filaments
- D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
- D07B2201/2003—Wires or filaments characterised by their cross-sectional shape flat
-
- 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
- D07B2201/2001—Wires or filaments
- D07B2201/2007—Wires or filaments characterised by their longitudinal shape
- D07B2201/2008—Wires or filaments characterised by their longitudinal shape wavy or undulated
-
- 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
Landscapes
- Ropes Or Cables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車タイヤの主とし
てベルト部の補強材として使用されるタイヤ補強用スチ
ールワイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire-reinforcing steel wire mainly used as a reinforcing material for a belt portion of an automobile tire.
【０００２】[0002]
【従来の技術】一般にこの種補強材は、複数本の断面円
形の鋼線を単層撚り又は複層撚りに撚り合わせたスチー
ルコードであって、このスチールコードの複数本を平行
に引揃えた状態でゴム材にて被覆して、タイヤの例えば
ベルト部に使用されている。最近、鋼線の材質及び加工
技術、ゴムの材質、タイヤ成型技術等の改良に伴って、
スチールコードの撚り構造は、１×４、１×３、１×２
と簡素化し、単線に近づいている。2. Description of the Related Art Generally, this kind of reinforcing material is a steel cord formed by twisting a plurality of steel wires having a circular cross section into a single-layer twist or a multi-layer twist, and a plurality of the steel cords are aligned in parallel. In this state, it is covered with a rubber material and used for a belt portion of a tire, for example. With the recent improvements in steel wire material and processing technology, rubber material, tire molding technology, etc.
Steel cord twist structure is 1x4, 1x3, 1x2
And simplified, approaching a single line.
【０００３】ところで、単線の補強材が望まれる理由
は、スチールコードの生産に際し、全コストのうち撚加
工工程のコストが非常に大きな割合を占めるからであ
る。そこで、撚加工工程の省略による生産コストの大幅
な低減やタイヤ成形工程における取扱作業性の向上を図
るため、タイヤ補強材として、単線のスチールワイヤが
提案されている（例えば、特開昭４８−６３９６１号公
報、特開昭５０−４３５９号公報）。また、上記公報に
は、スチールワイヤに柔軟性と伸び特性を付与するた
め、円形のくせ外形を有する小さなスパイラル状のくせ
（図４（イ））や小波状のくせ（図４（ロ））を施した
ものも開示されている。By the way, the reason why the reinforcing member for a single wire is desired is that the cost of the twisting process accounts for a very large proportion of the total cost in the production of the steel cord. Therefore, in order to greatly reduce the production cost by omitting the twisting process and improve the handling workability in the tire molding process, a single wire steel wire has been proposed as a tire reinforcing material (for example, Japanese Patent Laid-Open No. 48-48). 63961 and JP-A-50-4359). Further, in the above-mentioned publication, in order to impart flexibility and elongation characteristics to the steel wire, a small spiral-shaped habit (FIG. 4 (a)) and a small wavy habit (FIG. 4 (b)) are provided in order to impart flexibility and elongation characteristics to the steel wire. Those subjected to are also disclosed.
【０００４】[0004]
【発明が解決しようとする課題】スチールワイヤがタイ
ヤの補強材としての役割を十分に果たすためには、タイ
ヤが走行中において石等を踏んだとき、タイヤの変形
（凹み）に応じてスチールワイヤも柔軟に包み込むよう
に反応することが必要である。また、走行性を向上する
ためには、タイヤのベルト部の面内曲げ（横方向）剛性
に優れていることが必要である。In order for the steel wire to sufficiently fulfill its role as a reinforcing material for the tire, when the tire is stepped on a stone or the like while the tire is running, the steel wire may be deformed (dented) depending on the deformation of the tire. It is also necessary to react so as to flexibly wrap it. Further, in order to improve the running property, it is necessary that the belt portion of the tire has excellent in-plane bending (lateral direction) rigidity.
【０００５】しかるに、単線のスチールワイヤは、柔軟
性と伸び特性に問題があるばかりか、ワイヤのくせ形状
や真直性が不安定であるため、タイヤの補強材として殆
ど実用化されていない。即ち、単線のスチールワイヤ
は、強度と作業性の点を考慮すると、少しでも線径の大
きいワイヤを使用することとなって、柔軟性と伸び特性
において従来のスチールコードよりも劣るものとなる。
また図４（イ)(ロ）に示すような、スパイラル状や小波
状のくせを付与したものは、くせ形状の安定性やワイヤ
の真直性が十分ではない。However, the single-wire steel wire has not been practically used as a reinforcing material for tires because it has problems in flexibility and elongation properties, and in addition, the curl shape and straightness of the wire are unstable. That is, in consideration of strength and workability, the single-strand steel wire uses a wire having a larger diameter, and thus is inferior to the conventional steel cord in flexibility and elongation characteristics.
In addition, as shown in FIGS. 4 (a) and 4 (b), those having a spiral or small wavy habit do not have sufficient habit stability or wire straightness.
【０００６】本発明の目的は、従来のスチールコードに
代わる単線のスチールワイヤとして、柔軟性と伸び特性
だけでなく、タイヤのベルト部の面内曲げ剛性に優れ、
さらにくせ形状の安定した真直性の良いタイヤ補強用ス
チールワイヤを提供するにある。[0006] The object of the present invention is to replace the conventional steel cord with a single steel wire, which is excellent not only in flexibility and elongation characteristics but also in in-plane bending rigidity of the belt portion of the tire.
It is another object of the present invention to provide a tire-reinforcing steel wire having a stable curl shape and good straightness.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明者は研究を重ねた結果、タイヤに使用される
補強材として要求される柔軟性には方向性が必要であ
り、柔軟性が必要とされない方向ではむしろ剛性が要求
されること、低荷重での伸長度はあまり大きくならない
こと、そして丸線のままより圧延加工を最終的に加える
ことにより、これらの柔軟性、剛性、さらには真直性に
良い結果をもたらすことを知見し、本発明をなすに至っ
た。In order to achieve the above object, the present inventor has conducted extensive research and as a result, the flexibility required as a reinforcing material for a tire needs to be directional. Rigidity is required rather in the direction where flexibility is not required, elongation at low load does not become so large, and by finally adding rolling process with round wire, these flexibility, rigidity, Furthermore, they have found that they bring good results for straightness, and have completed the present invention.
【０００８】即ち、本発明に係るタイヤ補強用スチール
ワイヤは、断面略トラック形のワイヤに、略楕円形又は
略トラック形のくせ外形を有する扁平スパイラル状のく
せを施して成る。上記ワイヤの断面形状は幅Ｗ＝０.2０
〜０.8０mm、厚さＴ＝０.1６〜０.6０mm、扁平比Ｗ／Ｔ
＝１.0３〜１.6０の略トラック形であり、かつ扁平スパ
イラル状のくせは、くせピッチＰ＝２.0〜８.0mm、くせ
外形のくせ幅ＳＷ＝１.1Ｗ〜２.5Ｗmm、くせ厚さＳＴ＝
１.1Ｔ〜２.5Ｔmm、扁平比ＳＷ／ＳＴ＝１.0５〜２.5で
あると好適である。That is, the tire-reinforcing steel wire according to the present invention comprises a wire having a substantially track-shaped cross section, and a flat spiral-shaped habit having a quasi-elliptical or substantially track-shaped habit. The cross-sectional shape of the above wire has a width W = 0.20
~ 0.80mm, Thickness T = 0.16 ~ 0.60mm, Flatness ratio W / T
= 0.003 to 1.60, which is a substantially track shape, and has a flat spiral shape, a habit pitch P = 2.0 to 8.0 mm, a habit contour habit width SW = 1.1 W to 2.5 Wmm, Habit thickness ST =
It is preferable that it is 1.1 T to 2.5 Tmm and the flatness ratio SW / ST = 1.05 to 2.5.
【０００９】上記構成における数値限定は、実験の結果
から導き出したものである。幅Ｗ＝０.2０〜０.8０mmと
したのは、厚さＴとの関係もあるが、０.2０mm未満であ
ると、必要とする強力が得られず、また０.8mmを越える
と、幅方向の剛性が過剰になることによる。The numerical limitation in the above configuration is derived from the result of the experiment. The width W = 0.20 to 0.80 mm is related to the thickness T, but if it is less than 0.20 mm, the required strength cannot be obtained, and if it exceeds 0.8 mm, This is because the rigidity in the width direction becomes excessive.
【００１０】また、厚さＴ＝０.1６〜０.6０mmとしたの
は、幅Ｗとの関係もあるが、０.1６mm未満であると、必
要とする強力が得られず、また０.6０mmを越えると、厚
み方向の柔軟性に劣ることによる。The thickness T = 0.16 to 0.60 mm is related to the width W, but if it is less than 0.16 mm, the required strength cannot be obtained, and the thickness T is less than 0.16 mm. When it exceeds 60 mm, it is inferior in flexibility in the thickness direction.
【００１１】さらに、扁平比Ｗ／Ｔ＝１.0３〜１.6０と
したのは、１.0３未満であると、扁平効果による幅方向
の剛性強化が少なく、また１.6０を越えると、幅方向の
剛性が過剰になることによる。Further, the flatness ratio W / T = 1.03 to 1.60 is set so that when the flatness ratio is less than 1.03, the rigidity enhancement in the width direction due to the flattening effect is small, and when it exceeds 1.60. This is because the rigidity in the width direction becomes excessive.
【００１２】そして、扁平スパイラル状のくせにおい
て、ピッチＰ＝２.0〜８.0mmとしたのは、くせ外形の大
きさとの関係もあるが、２.0mm未満であると、必要な伸
長度が得られず、くせ付け時に無理な塑性変形を施すこ
ととなり、耐疲労性を低下させる。また８.0mmを越える
と、必要な伸長度を得ることができない。In the flat spiral habit, the pitch P = 2.0 to 8.0 mm is related to the size of the habit outer shape, but if it is less than 2.0 mm, the required elongation is required. Is not obtained, and excessive plastic deformation is applied during squeezing, which reduces fatigue resistance. If it exceeds 8.0 mm, the required elongation cannot be obtained.
【００１３】また、くせ外形のくせ幅ＳＷ＝１.1Ｗ〜
２.5Ｗmmとしたのは、ピッチＰとの関係もあるが、１.1
Ｗmm未満であると、必要な伸長度が得られず、また２.5
Ｗmmを越えると、一次弾性限が低荷重時に存在してタイ
ヤ変形等の種々の弊害を招くと共に幅方向の剛性が低下
することによる。Further, the habit width of the habit outline SW = 1.1 W or more
2.5Wmm is related to the pitch P, but 1.1
If it is less than Wmm, the required elongation cannot be obtained, and 2.5
If it exceeds W mm, the primary elastic limit exists at a low load, which causes various problems such as tire deformation and lowers the rigidity in the width direction.
【００１４】また、くせ外形のくせ厚さＳＴ＝１.1Ｔ〜
２.5Ｔmmとしたのは、ピッチＰとの関係もあるが、１.1
Ｔmm未満であると、厚み方向の柔軟性に劣り、また２.5
Ｔmmを越えると、長径ＳＷと同様に一次弾性限が低荷重
時に存在してタイヤ変形等の種々の弊害を招くと共に幅
方向の剛性が低下することによる。Further, the habit contour habit thickness ST = 1.1T to
The value of 2.5 Tmm is related to the pitch P, but 1.1
If it is less than Tmm, the flexibility in the thickness direction is inferior, and it is 2.5
When Tmm is exceeded, the primary elastic limit exists at the time of a low load like the major axis SW, causing various adverse effects such as tire deformation and lowering the rigidity in the width direction.
【００１５】さらに、扁平比ＳＷ／ＳＴ＝１.0５〜２.5
としたのは、１.0５未満であると、幅方向の剛性が過剰
になり、また２.5を越えると、幅方向の剛性が少なくな
ることによる。Further, the flatness ratio SW / ST = 1.05 to 2.5
The reason is that if it is less than 1.05, the rigidity in the width direction becomes excessive, and if it exceeds 2.5, the rigidity in the width direction becomes small.
【００１６】ところで、上記スチールワイヤには、その
表面に銅、亜鉛を含有する二種以上の合金からなるメッ
キを施すことにより、ゴムとの接着性をより一層有効に
なすことができる。さらには単線構造であるため、タイ
ヤの内圧保持性、耐カット性等を良好に保つために、引
張強さを３３０kgｆ／mm2 以上とすることが好適であ
る。By the way, the steel wire can be more effectively adhered to rubber by plating the surface of the steel wire with two or more alloys containing copper and zinc. Further, since it has a single wire structure, it is preferable that the tensile strength is 330 kgf / mm 2 or more in order to keep the tire's internal pressure retention, cut resistance and the like in good condition.
【００１７】[0017]
【作用】上記構成のスチールワイヤをタイヤのベルト部
に埋設すると、スチールワイヤがその断面形状（略トラ
ック形）により幅方向の剛性と厚み方向の柔軟性に富
み、スパイラル状のくせ外形の厚み方向の波により厚み
方向の柔軟性をさらに向上し、幅方向の波により幅方向
の適度の柔軟性をも付与するので、良好な伸び特性と面
内曲げ剛性が得られる。When the steel wire having the above-mentioned structure is embedded in the belt portion of the tire, the steel wire is rich in rigidity in the width direction and flexibility in the thickness direction due to its cross-sectional shape (substantially track shape), and has a spiral eccentric outer shape thickness direction. By further improving the flexibility in the thickness direction by the wave and imparting an appropriate flexibility in the width direction by the wave in the width direction, good elongation characteristics and in-plane bending rigidity can be obtained.
【００１８】[0018]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図１は本発明に係るタイヤ補強用スチール
ワイヤの一実施例を示す概略説明図で、（イ）は側面
図、（ロ）は横断面図、（ハ）は平面図である。スチー
ルワイヤ１は、その横断面形状が幅Ｗ＝０.4２mm、厚さ
Ｔ＝０.2９mm、扁平比Ｗ／Ｔ＝１.4５である略トラック
形を有し、さらにくせ外形２がくせ幅ＳＷ＝０.4８mm、
くせ厚さＳＴ＝０.3１mm、扁平比ＳＷ／ＳＴ＝１.5５で
ある略楕円形を有して、くせピッチＰ＝３.0３mmのスパ
イラル状のくせを有する。このスチールワイヤ１の引張
強さは３４２kgｆ／mm2 、破断伸度は３.1％であった。
また幅方向の剛性は厚み方向の剛性の１.2倍を有するも
のであった。FIG. 1 is a schematic explanatory view showing an embodiment of a steel wire for tire reinforcement according to the present invention. (A) is a side view, (b) is a cross-sectional view, and (c) is a plan view. The steel wire 1 has a cross-sectional shape with a width W = 0.42 mm, a thickness T = 0.29 mm, and a flatness ratio W / T = 1.45, and has a substantially track shape. SW = 0.48 mm,
It has a substantially elliptical shape with a habit thickness ST = 0.31 mm and a flatness ratio SW / ST = 1.55, and has a spiral habit with a habit pitch P = 3.03 mm. The tensile strength of this steel wire 1 was 342 kgf / mm 2 , and the breaking elongation was 3.1%.
The rigidity in the width direction was 1.2 times the rigidity in the thickness direction.
【００２０】次に、上記スチールワイヤ１の製造方法に
ついて図２に基づいて説明する。炭素含有量０.8５wt％
の高炭素鋼線材に熱処理および伸線加工を行って線径ｄ
＝０.3８mmの素線Ｗを得た（図２（イ））。次に、この
素線Ｗにピッチ３.0mm、直径Ｄ＝０.4４mmのスパイラル
状のくせを施し（図２（ロ））た後、ロールＲ、Ｒで以
て一方向の平圧延加工を行って（図２（ハ））、断面形
状がトラック形であり、かつくせ外形２が略楕円形を画
く扁平スパイラル状のくせを有するスチールワイヤ１を
得た（図２（ニ））。Next, a method of manufacturing the steel wire 1 will be described with reference to FIG. Carbon content 0.85wt%
Heat treatment and wire drawing of the high carbon steel wire rod of
A wire W having a thickness of 0.38 mm was obtained (Fig. 2 (a)). Next, this wire W is given a spiral habit with a pitch of 3.0 mm and a diameter D of 0.44 mm (Fig. 2 (b)), and then flat rolled in one direction with rolls R and R. By performing (FIG. 2C), a steel wire 1 having a track-shaped cross section and a flat spiral-shaped habit whose habit contour 2 draws a substantially elliptical shape was obtained (FIG. 2D).
【００２１】上記素線Ｗに施すスパイラル状のくせは、
くせ付けピン間や千鳥状に施した小径ローラ間に素線を
通したり、素線を歯車等にかみ込ませて捻じることによ
って付与することができる。また、上記くせ外形は平圧
延の加工程度によって略トラック形にすることもある。The spiral habit applied to the wire W is
The wire can be applied by passing the wire between the squeezing pins or between the small-diameter rollers formed in a zigzag pattern, or by twisting the wire by engaging the wire with a gear or the like. Further, the habit contour may be formed into a substantially track shape depending on the degree of flat rolling.
【００２２】次に、本発明の上記実施例とその他の実施
例を、従来例および比較例と比べて具体的に説明する。
表１に示す実験番号２は上記の実施例であり、実験番号
１〜９は上記実験番号２の実施例と同様の加工方法によ
り、線径φ０.3２mmとφ０.3８mmのワイヤを異なる断面
形状、扁平スパイラル状のくせを施したタイヤ補強用ス
チールワイヤであるが、実験番号１，２，３，４，５は
本発明の実施例であり、実験番号６，７，８，９は比較
例である。また実験番号１０，１１はワイヤの断面形状
とスパイラル状のくせが略円形の従来例である。Next, the above-mentioned embodiment of the present invention and other embodiments will be specifically described in comparison with a conventional example and a comparative example.
Experiment No. 2 shown in Table 1 is the above-mentioned embodiment, and Experiment Nos. 1 to 9 are the same processing method as the embodiment of Experiment No. 2 above, and the wire having different diameters of φ0.32 mm and φ0.38 mm has different sectional shapes. The steel wires for tire reinforcement having flat spiral habits are Experiment Nos. 1, 2, 3, 4, and 5 of the present invention, and Experiment Nos. 6, 7, 8, and 9 are comparative examples. Is. Experiment numbers 10 and 11 are conventional examples in which the cross-sectional shape of the wire and the spiral habit are substantially circular.
【００２３】表１に示す実施例、比較例、従来例の伸び
特性を調査したところ、実施例の実験番号１，２，３，
４，５はいずれも変曲点が高荷重時に存在し、また破断
伸度もこの種の補強材とし適した２.5〜６％の範囲内で
あった。これに対し、比較例の実験番号６はピッチＰが
長く変曲点が低荷重時に存在し、伸長度が大きく伸び特
性上問題があり、また比較例の実験番号８も扁平スパイ
ラル状のくせの扁平比ＳＷ／ＳＴが大きく、変曲点が低
荷重時に存在した。When the elongation characteristics of the examples, comparative examples and conventional examples shown in Table 1 were investigated, experiment numbers 1, 2, 3 of the examples were examined.
In each of Nos. 4 and 5, the inflection point was present under a high load, and the breaking elongation was within the range of 2.5 to 6%, which is suitable for this type of reinforcing material. On the other hand, in Experiment No. 6 of Comparative Example, the pitch P is long and the inflection point exists at the time of low load, the degree of elongation is large, and there is a problem in the elongation property. In addition, Experiment No. 8 of Comparative Example also has a flat spiral habit. The flatness ratio SW / ST was large, and the inflection point was present when the load was low.
【００２４】[0024]
【表１】 [Table 1]
【００２５】次に、柔軟性および幅方向の剛性を調査し
たところ、比較例の実験番号７はスチールワイヤの断面
形状の扁平比Ｗ／Ｔが大きく、幅方向の剛性が過剰であ
り、実験番号９は扁平比Ｗ／Ｔ、ＳＷ／ＳＴが小さく、
幅方向の剛性の向上が認められなかった。そして実施例
のものは、従来例のものより厚み方向の柔軟性が約３〜
２０％向上し、幅方向の剛性は約５〜２５％優れてい
た。Next, when the flexibility and the rigidity in the width direction were investigated, in Experiment No. 7 of the comparative example, the flatness ratio W / T of the sectional shape of the steel wire was large and the rigidity in the width direction was excessive. 9 has a small flatness ratio W / T and SW / ST,
No improvement in rigidity in the width direction was observed. And the example has a flexibility of about 3 to 3 in the thickness direction as compared with the conventional example.
It was improved by 20%, and the rigidity in the width direction was excellent by about 5 to 25%.
【００２６】また、実施例のものは、全て圧延加工によ
り前工程のくせ付け加工により悪化した真直性が矯正さ
れて優れた真直性を有していた。Further, all of the examples had excellent straightness because the straightness deteriorated by the squeezing work in the previous step was corrected by the rolling work.
【００２７】ところで、上記剛性は、図５に示すよう
に、３本のスチールワイヤ１をその幅方向を横にして厚
さ４mmのゴムシートＧ中に埋め込んで加圧加硫した試験
シートＳを、間隔１０cmで両点支持し中央に荷重を加え
て５mm撓ますのに要した荷重を測定したものである。な
お、図４（イ）は厚み方向の剛性測定方法を、同（ロ）
は幅方向の剛性測定方法を示す説明図である。By the way, as to the rigidity, as shown in FIG. 5, a test sheet S obtained by embedding three steel wires 1 in a rubber sheet G having a width of 4 mm in a thickness of 4 mm and vulcanizing under pressure is used. The load required to bend by 5 mm by supporting both points at intervals of 10 cm and applying a load to the center was measured. It should be noted that FIG. 4A shows the method of measuring the rigidity in the thickness direction by
FIG. 4 is an explanatory diagram showing a stiffness measuring method in the width direction.
【００２８】また、本発明のスチールワイヤ１を横向き
にして複数本を所要間隔をおいて並列して、上下より２
枚のゴムシートで被覆したゴム材との複合体３を作成し
たところ、取扱作業性が従来のスチールコードに比して
大幅に向上した。また、上記複合体３をタイヤのベルト
部４に埋設してタイヤ５を製造して走行テストを行った
ところ、走行安定性に優れ、乗り心地性も向上した。Further, the steel wire 1 of the present invention is laterally arranged, and a plurality of the steel wires 1 are arranged side by side at a required interval, and the steel wires 1 are arranged from above and below.
When a composite 3 with a rubber material coated with a single rubber sheet was prepared, the handling workability was significantly improved as compared with the conventional steel cord. Moreover, when the tire 5 was manufactured by embedding the composite 3 in the belt portion 4 of the tire and a running test was conducted, the running stability was excellent and the riding comfort was also improved.
【００２９】[0029]
【発明の効果】本発明のタイヤ補強用スチールワイヤ
は、上記構成になしたので、くせ形状が安定し、かつ真
直性にも優れ、幅方向の剛性強化と厚さ方向の柔軟性が
向上し、かつ伸び特性も好適であり、タイヤのベルト部
の面内剛性に優れ、タイヤの走行安定性と乗り心地性が
向上する。またタイヤの厚さを薄くでき、タイヤの軽量
化が図れ、燃費向上につながる。更に、撚加工工程を要
せず、安価に製造できる等の効果を有する。EFFECTS OF THE INVENTION The steel wire for reinforcing a tire of the present invention has the above-mentioned constitution, so that the eccentric shape is stable and the straightness is excellent, and the rigidity in the width direction and the flexibility in the thickness direction are improved. In addition, the elongation property is also suitable, the in-plane rigidity of the belt portion of the tire is excellent, and the running stability and riding comfort of the tire are improved. In addition, the thickness of the tire can be reduced, the weight of the tire can be reduced, and fuel consumption can be improved. Furthermore, there is an effect that a twisting process is not required and the manufacturing cost can be reduced.
【図１】本発明の実施例のタイヤ補強用スチールワイヤ
を示し、（イ）は側面図、（ロ）は断面図、（ハ）は平
面図である。1 shows a steel wire for reinforcing a tire according to an embodiment of the present invention, (a) is a side view, (b) is a sectional view, and (c) is a plan view.
【図２】（イ）〜（ニ）は本発明のタイヤ補強用スチー
ルワイヤの製造工程を示す概略説明図である。2 (a) to (d) are schematic explanatory views showing a manufacturing process of the steel wire for tire reinforcement of the present invention.
【図３】本発明のタイヤ補強用スチールワイヤの使用例
を示し、（イ）は複合体の一部破断断面図、（ロ）はタ
イヤの要部断面図である。FIG. 3 shows an example of use of the steel wire for tire reinforcement of the present invention, (a) is a partially cutaway sectional view of the composite, and (b) is a main part sectional view of the tire.
【図４】剛性テストを示し、（イ）は厚み方向の、
（ロ）は幅方向の夫々測定方法を示す説明図である。FIG. 4 shows a rigidity test, (a) in the thickness direction,
(B) is an explanatory view showing the respective measuring methods in the width direction.
【図５】（イ)(ロ）は従来のタイヤ補強用スチールワイ
ヤを示す概略断面図である。5A and 5B are schematic cross-sectional views showing a conventional tire reinforcing steel wire.
１ スチールワイヤ ２ くせ外形 ３ 複合体 ４ ベルト部 ５ タイヤ 1 Steel wire 2 Curse outline 3 Composite body 4 Belt part 5 Tire
Claims (2)
又は略トラック形のくせ外形を有する扁平スパイラル状
のくせを施したことを特徴とするタイヤ補強用スチール
ワイヤ。1. A steel wire for reinforcing a tire, characterized in that a wire having a substantially track-shaped cross section is provided with a flat spiral-shaped habit having a substantially oval or substantially track-shaped habit.
０mm、厚さＴ＝０.1６〜０.6０mm、扁平比Ｗ／Ｔ＝１.0
３〜１.6０の略トラック形であり、かつ扁平スパイラル
状のくせがくせピッチＰ＝２.0〜８.0mm、くせ外形のく
せ幅ＳＷ＝１.1Ｗ〜２.5Ｗmm、くせ厚さＳＴ＝１.1Ｔ〜
２.5Ｔmm、扁平比ＳＷ／ＳＴ＝１.0５〜２.5である請求
項１記載のタイヤ補強用スチールワイヤ。2. The cross-sectional shape of the wire has a width W = 0.20 to 0.8.
0mm, thickness T = 0.16 ~ 0.60mm, flatness ratio W / T = 1.0
It is a track shape of 3 to 1.60 and has a flat spiral shape, a peculiar peculiar pitch P = 2.0 to 8.0 mm, a peculiar external pattern peculiar width SW = 1.1 W to 2.5 W mm, a peculiar thickness ST = 1.1T ~
The steel wire for tire reinforcement according to claim 1, wherein the steel wire has a flatness ratio of 2.5 Tmm and a SW / ST of 1.05 to 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30683592A JP3148845B2 (en) | 1992-11-17 | 1992-11-17 | Steel wire for tire reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30683592A JP3148845B2 (en) | 1992-11-17 | 1992-11-17 | Steel wire for tire reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06158565A true JPH06158565A (en) | 1994-06-07 |
| JP3148845B2 JP3148845B2 (en) | 2001-03-26 |
Family
ID=17961833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30683592A Expired - Fee Related JP3148845B2 (en) | 1992-11-17 | 1992-11-17 | Steel wire for tire reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3148845B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1059380A2 (en) * | 1999-06-03 | 2000-12-13 | Hongduk Steel Cord Co., Ltd. | Reinforcing steel cord for rubber products, method and device for producing such steel cords |
| JP2001030705A (en) * | 1999-07-23 | 2001-02-06 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| JP2001080313A (en) * | 1999-09-17 | 2001-03-27 | Ohtsu Tire & Rubber Co Ltd :The | Pneumatic tire |
| JP2006336154A (en) * | 2005-06-02 | 2006-12-14 | Tokyo Seiko Co Ltd | Flat wire for rubber reinforcement |
| JP2009041170A (en) * | 2007-07-17 | 2009-02-26 | Bridgestone Corp | Wire for reinforcing rubber article and rubber article using the same |
| JP2012219419A (en) * | 2011-04-13 | 2012-11-12 | Bridgestone Corp | Wire for reinforcing rubber article and method for producing the same |
-
1992
- 1992-11-17 JP JP30683592A patent/JP3148845B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1059380A2 (en) * | 1999-06-03 | 2000-12-13 | Hongduk Steel Cord Co., Ltd. | Reinforcing steel cord for rubber products, method and device for producing such steel cords |
| EP1059380A3 (en) * | 1999-06-03 | 2001-10-10 | Hongduk Steel Cord Co., Ltd. | Reinforcing steel cord for rubber products, method and device for producing such steel cords |
| JP2001030705A (en) * | 1999-07-23 | 2001-02-06 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| JP2001080313A (en) * | 1999-09-17 | 2001-03-27 | Ohtsu Tire & Rubber Co Ltd :The | Pneumatic tire |
| JP2006336154A (en) * | 2005-06-02 | 2006-12-14 | Tokyo Seiko Co Ltd | Flat wire for rubber reinforcement |
| JP4551820B2 (en) * | 2005-06-02 | 2010-09-29 | 東京製綱株式会社 | Flat wire for rubber reinforcement |
| JP2009041170A (en) * | 2007-07-17 | 2009-02-26 | Bridgestone Corp | Wire for reinforcing rubber article and rubber article using the same |
| JP2012219419A (en) * | 2011-04-13 | 2012-11-12 | Bridgestone Corp | Wire for reinforcing rubber article and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3148845B2 (en) | 2001-03-26 |
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