JPH04201553A - Method for molding reinforced cap ply in radial tire - Google Patents
Method for molding reinforced cap ply in radial tireInfo
- Publication number
- JPH04201553A JPH04201553A JP2338916A JP33891690A JPH04201553A JP H04201553 A JPH04201553 A JP H04201553A JP 2338916 A JP2338916 A JP 2338916A JP 33891690 A JP33891690 A JP 33891690A JP H04201553 A JPH04201553 A JP H04201553A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- belt layers
- cover
- strip material
- band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000000465 moulding Methods 0.000 title abstract description 3
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高速耐久性に優れたラジアルタイヤを得るた
めの補強キャッププライの成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming a reinforced cap ply for obtaining a radial tire with excellent high-speed durability.
（従来の技術）
左右一対のビードコアと、該コアのまわりを折返して係
止されるラジアル方向コード配列のカーカスと、該カー
カスのクラウン部外側に配置されたコードをタイヤ周方
向に浅い角度で配列してなるベルト層と、を備えたラジ
アルタイヤにおいて、高速走行時の遠心力によるベルト
層の浮き上り（リフティング現象）を抑制するため、ベ
ルト層の外側に補強カバー（補強キャンプブライ）を配
置したラジアルタイヤが提案されている（特開昭６３−
３０５００６号公報（従来例の１）、特開昭６２−２５
１２０３号公報（従来例の２）等参照）。(Prior art) A pair of left and right bead cores, a carcass with a radial cord arrangement that is folded around the cores and locked, and the cords arranged on the outside of the crown part of the carcass are arranged at a shallow angle in the tire circumferential direction. In a radial tire equipped with a belt layer made of aluminum, a reinforcing cover (reinforced camp braai) is placed on the outside of the belt layer in order to suppress the lifting phenomenon of the belt layer due to centrifugal force during high-speed driving. Radial tires have been proposed (Japanese Patent Application Laid-open No. 1983-
Publication No. 305006 (conventional example 1), JP-A-62-25
(See Publication No. 1203 (Conventional Example 2), etc.).
（発明が解決しようとする課題）
前述した従来例の１〜２は、それなりに有用性・ が
認められるけれども、次のような課題があった。(Problems to be Solved by the Invention) Although the conventional examples 1 and 2 described above are recognized to have some degree of usefulness, they have the following problems.
すなわち、従来例の１では、補強帯のスプライス部をな
くすことができず、剛性差によりユニフオミティを低下
させ、振動の発生、偏摩耗の原因となり、また補強層等
の裁断工程が２種類となり、生産性が若干低下する。That is, in conventional example 1, the splice part of the reinforcing band cannot be eliminated, and the uniformity is reduced due to the difference in rigidity, causing vibration and uneven wear, and there are two types of cutting processes for the reinforcing layer, etc. Productivity will decrease slightly.
また、従来例の２では、スプライス部をなくすことはで
きるが、生産性を大幅に低下させる。Furthermore, in Conventional Example 2, although the splice portion can be eliminated, productivity is significantly reduced.
更に、第５図、第６図で示す如（、内外複数のベルト層
（ブレーカ層’）Ａ、Ｂのリフティング現象をおさえる
ための補強キャンププライＣの螺旋状巻付は手段として
、コードを埋入した幅１０ｍの平板状帯体を、第５図に
示す如くタイヤセンタを始端として左右各別に螺旋状に
巻付ける場合と、第６図に示す如（ベルト層Ａ、Ｂの両
側域における一例域を始端とし他側域に連続して螺旋状
に巻付ける場合とがあり、いずれの場合においても、ベ
ルト層Ａの全幅が１０、すなわち、帯体の幅で割り切れ
ないときは、成形機シーケンサ−制御の移動回数が整数
値とならないことから、ベルト層Ａ、Ｂの両端縁を帯体
で完全に覆うことができなかったり、当該部位で帯体が
所謂ダンゴ状となったりして、フォースバリエーション
やハイスピード性能に悪影響を招くという課題があった
。Furthermore, as shown in Figs. 5 and 6, the reinforcing camp ply C is wound in a spiral manner to suppress the lifting phenomenon of the plurality of inner and outer belt layers (breaker layers) A and B. In one case, a flat band with a width of 10 m is wound spirally on each left and right side starting from the tire center as shown in Fig. 5, and in the other as shown in Fig. 6 (an example on both sides of belt layers A and B). In some cases, the belt layer A is wound in a spiral shape starting from one side area and continuing to the other side area. - Since the number of control movements is not an integer value, it may not be possible to completely cover both edges of belt layers A and B with the belt, or the belt may become so-called dango-shaped at the relevant part, resulting in the force There was a problem in that it had a negative impact on variation and high-speed performance.
本発明は、斯る課題に鑑み、ベルト層の幅に左右される
ことなく帯体を均一に巻付けて成形し得るようにしたこ
とを目的とする。SUMMARY OF THE INVENTION In view of these problems, an object of the present invention is to enable a band to be uniformly wound and formed without being influenced by the width of the belt layer.
（課題を解決するための手段）
本発明は、ラジアル方向のコード配列とされたカーカス
２のクラウン部外側に、コードをタイヤ周方向に浅い角
度で配列してなる内外複数のベルト層３．４を配置し、
該ベルト層３，４の最外側に、コード８を埋入した平板
状の帯体９を螺旋状に巻付けてベルト層３，４を覆う補
強キャンププライ５の成形方法において、前述の目的を
達成するために、次の技術的手段を講じている。(Means for Solving the Problems) The present invention provides a plurality of inner and outer belt layers 3.4 in which the cords are arranged at a shallow angle in the circumferential direction of the tire on the outside of the crown portion of the carcass 2 in which the cords are arranged in the radial direction. Place the
The above-mentioned object is achieved in a method of forming a reinforcing camp ply 5 that covers the belt layers 3 and 4 by spirally wrapping a flat band 9 in which a cord 8 is embedded on the outermost side of the belt layers 3 and 4. To achieve this, we have taken the following technical measures:
すなわち、本発明は、前記帯体９の巻付は始端９＾、９
Ａは、タイヤ中心Ｏ−０の左右両側に位置し、前記各始
端９Ａ、９Ａから左右各別に帯体９をタイヤ軸方向外方
に２〜６回密接状に巻付けてベルト層３．４の左右両端
域り、Ｒを覆うとともに、タイヤ軸方向最外方に位置す
る帯体９Ｂで内外複数のベルト層３，４における両端縁
を同時社覆ってから当該帯体９をタイヤ中心０−０側に
向って折返し、該折返した左右の帯体９を、前記巻付は
始端９Ａ、９Ａを越えてタイヤ軸方向内方に密接状に巻
付けてベルト層３．４の中央域Ｓを覆うとともに、該中
央域Ｓにおいて左右の帯体９をタイヤ周方向長さの１／
３以下でオーバランプ１１シて成形することを特徴とす
る。That is, in the present invention, the band 9 is wound at the starting ends 9^, 9.
A is located on both the left and right sides of the tire center O-0, and the belt layer 3.4 is formed by tightly wrapping the band 9 2 to 6 times outward in the tire axial direction from the respective starting ends 9A, 9A on the left and right sides respectively. At the same time, the band 9B located at the outermost side in the tire axial direction covers both edges of the plurality of inner and outer belt layers 3, 4, and then the band 9 is placed around the center of the tire. 0 side, and the folded left and right bands 9 are wrapped closely inward in the tire axial direction beyond the starting ends 9A, 9A to cover the central region S of the belt layer 3.4. At the same time, in the central region S, the left and right bands 9 are
It is characterized by molding with an overramp of 3 or less.
（実施例） 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.
第３図は扁平率５５％以下の超高速用扁平ラジアルタイ
ヤＴを例示している。FIG. 3 illustrates an ultra-high-speed flat radial tire T having an aspect ratio of 55% or less.
このラジアルタイヤＴは、左右一対のビードコアＩＡ、
ＩＢと、該コアＩＡ、 ＩＢのまわりを折返して係止
されるラジアル方向コード配列のカーカス２と、該カー
カス２のクラウン部外側に配置されコードをタイヤ周方
向に浅い角度で配列してなる内外複数のベルト層３．４
と、該ベルト層３．４の最外側に巻回して該ベルト層３
，４を覆うように配置された補強キャップブライ５と、
を備えている。This radial tire T has a pair of left and right bead cores IA,
IB, the core IA, a carcass 2 with a radial cord arrangement that is folded back around the IB and locked, and an inner and outer carcass 2 arranged on the outside of the crown part of the carcass 2 and with cords arranged at a shallow angle in the circumferential direction of the tire. Multiple belt layers 3.4
and the belt layer 3.4 is wound around the outermost side of the belt layer 3.4.
, 4, and a reinforcing cap brace 5 arranged to cover the
It is equipped with
なお、トレッド表面には主溝６が形成してあり、この主
溝６を介してブロック７が形成しである。Note that a main groove 6 is formed on the tread surface, and a block 7 is formed through this main groove 6.
補強キャップブライ５は、第４図で示す如く、ゴム被覆
され互いに平行に並んだ１〜１５本の補強コード８すな
わち有機繊維コード（例えば、ナイロンコード）を埋入
した１０ｍ幅の平板状帯体９からなる。As shown in FIG. 4, the reinforcing cap bra 5 is a flat band with a width of 10 m in which 1 to 15 reinforcing cords 8, that is, organic fiber cords (for example, nylon cords) coated with rubber are embedded in parallel to each other. Consists of 9.
第１図、第２図に示す如く、前記帯体９の巻付は始端９
Ａ、９Ａは、タイヤ中心Ｏ−０の左右両側に位置し、前
記各始端９Ａ、９Ａから左右各別に帯体９をタイヤ軸方
向外方に２〜６回密接状に巻付けてベルト層３．４の左
右両端域り、Ｒを覆うとともに、タイヤ軸方向最外方に
位置する帯体９Ｂで内外複数のベルト層３，４における
両端縁を同時に覆ってから当該帯体９をタイヤ中心０−
０側に向って折返し、該折返した左右の帯体９を、前記
巻付は始端９Ａ、９＾を越えてタイヤ軸方向内方に密接
状に巻付けてベルト層３，４の中央域Ｓを覆うとともに
、該中央域Ｓにおいて左右の帯体９をタイヤ周方向長さ
の１７３以下でオーバーラップｌＯすべく巻付は終端９
Ｃ，９Ｃを設定している。As shown in FIGS. 1 and 2, the band 9 is wound at the starting end 9.
A, 9A are located on both the left and right sides of the tire center O-0, and the belt layer 3 is formed by closely wrapping the band 9 2 to 6 times outward in the tire axial direction from the respective starting ends 9A, 9A on the left and right respectively. .4, cover both left and right end areas and R, and simultaneously cover both edges of the plurality of inner and outer belt layers 3, 4 with the band 9B located at the outermost side in the tire axial direction, and then move the band 9 to the tire center 0. −
The folded left and right bands 9 are wrapped tightly inward in the axial direction of the tire beyond the starting ends 9A and 9^, and wrapped around the central region S of the belt layers 3 and 4. In order to cover the left and right bands 9 in the central region S and overlap them by 173 or less of the circumferential length of the tire, the wrapping is done at the end 9.
C, 9C is set.
ここにおいて、第２図で示す幅Ｌｌ、Ｒ１は帯体９が１
０ｍ幅であるとき、１５〜５５ｍであり、１，２．Ｒ２
は同じく５日であり、これによって、ベルト層３．４の
端縁幅１２が５ｆｉであるときは、当該帯体９を螺旋状
に２回巻きする場合、タイヤ軸方向最外方に位置する帯
体９Ｂで内外複数のベルト層３，４における両端縁を同
時に覆う最小単位であり、又、帯体９を螺旋状に６回巻
きする場合は、巻付は始端９Ａ。Here, the widths Ll and R1 shown in FIG.
When the width is 0m, it is 15 to 55m, and 1, 2. R2
is also 5 days, and thereby, when the edge width 12 of the belt layer 3.4 is 5fi, when the band 9 is wound twice in a spiral shape, the belt layer 3.4 is located at the outermost position in the axial direction of the tire. This is the smallest unit that simultaneously covers both edges of the plurality of inner and outer belt layers 3 and 4 with the band 9B, and when the band 9 is wound six times in a spiral, the winding is at the starting end 9A.
９Ａがトレッドパターンにおける１７４点のブロック７
＾の下にあり、当該ブロック７＾付近は、トレッドとブ
レーカ−の剥離やトレッドゴム自体の組成破壊によるゴ
ム間の剥離等熱による影響を受は易い部分であることか
ら、帯体９を螺旋状に巻付けてベルト層３．４のリフテ
ィング現象を抑制しているのである。9A is block 7 of 174 points in the tread pattern
Since the area near the block 7^ is easily affected by heat, such as peeling between the tread and the breaker or peeling between rubber due to compositional destruction of the tread rubber itself, the strip 9 is spirally The lifting phenomenon of the belt layer 3.4 is suppressed by winding the belt layer 3.4 in a shape.
従って、補強キャッププライ５は、ラジアル方向に連続
した又は周方向に角度をもち連続したスプライス部がな
く、また、帯体９のオーバーラツプ１１もトレッドの実
接地部のラジアル方向に連続しないわずかな部分であり
、これによって、剛性差はわずかじか生じることがない
ので、タイヤＴを自動車等に装着して回転させてもタイ
ヤＴの縦振れ現象等も防止できる。Therefore, the reinforcing cap ply 5 does not have a splice part that is continuous in the radial direction or continuous at an angle in the circumferential direction, and the overlap 11 of the band member 9 is also a small part that is not continuous in the radial direction of the actual ground contact part of the tread. As a result, only a slight difference in rigidity occurs, so even when the tire T is mounted on an automobile or the like and rotated, vertical vibration of the tire T can be prevented.
なお、ベルト層３．４としてはスチールコードを採用で
きるが、スチールではなくケブラー等の比重の小さな材
料を採用することで、タイヤの軽量化を図ることもでき
る。Although a steel cord can be used as the belt layer 3.4, the weight of the tire can also be reduced by using a material with low specific gravity such as Kevlar instead of steel.
また、帯体９のコード８は、伸度が異なる複数のコード
を撚合させてなる複合コードであってもよい。Further, the cord 8 of the band 9 may be a composite cord formed by twisting together a plurality of cords having different degrees of elongation.
（発明の効果）
本発明によれば、ヘルド層の幅に左右されることなく該
ヘルド層の中央域、左右両域を、ヘルド層エツジを確実
に締付けて均一に帯体を螺旋状に巻付は得るので、フォ
ースバリエーション、ハイスピード性能を向上したラジ
アルタイヤを得ることができる。(Effects of the Invention) According to the present invention, the heald layer edges are reliably tightened and the band is evenly wound spirally in the central region and both left and right regions of the heald layer, regardless of the width of the heald layer. Since you can get a radial tire with improved force variation and high speed performance.
また、中央域の巻付終端はタイヤ周方向の１７３以下の
オーバーラツプとして巻付けることによって、帯体の締
付は力も均等化され、フォースバリエーション、ハイス
ピード性能、ラジアルランナアウト（タイヤ縦振れ）な
どの向上が期待できる。In addition, by wrapping the end of the winding in the center area with an overlap of 173 degrees or less in the tire circumferential direction, the tightening force of the band is equalized, resulting in improved force variations, high-speed performance, radial runner-out (tire vertical runout), etc. can be expected to improve.
図面は本発明の一実施例を示し、第１図は要部の展開平
面図、第２図は巻付は手順を示す説明図、第３図はラジ
アルタイヤの断面図、第４図は帯体の部分斜視図、第５
図と第６図は従来例の説明図である。
Ｔ・・・ラジアルタイヤ、２・・・カーカス、３．４・
・・ベルト層、５・・・補強キャップブライ、９・・・
帯体、９Ａ・・・巻付始端、９ｃ・・・巻付終端。
特 許 出 願 人 オーツタイヤ株式会社第３図
第ム図The drawings show one embodiment of the present invention, with FIG. 1 being a developed plan view of the main parts, FIG. Partial perspective view of the body, No. 5
FIG. 6 and FIG. 6 are explanatory diagrams of a conventional example. T...Radial tire, 2...Carcass, 3.4.
... Belt layer, 5... Reinforced cap bra, 9...
Band body, 9A...winding start end, 9c...winding end. Patent applicant Otsu Tire Co., Ltd. Figure 3
Claims (1)
）のクラウン部外側に、コードをタイヤ周方向に浅い角
度で配列してなる内外複数のベルト層（３）（４）を配
置し、該ベルト層（３）（４）の最外側に、コード（８
）を埋入した平板状の帯体（９）を螺旋状に巻付けてベ
ルト層（３）（４）を覆う補強キャッププライ（５）の
成形方法において、 前記帯体（９）の巻付け始端（９Ａ）（９Ａ）は、タイ
ヤ中心Ｏ−Ｏの左右両側に位置し、前記各始端（９Ａ）
（９Ａ）から左右各別に帯体（９）をタイヤ軸方向外方
に２〜６回密接状に巻付けてベルト層（３）（４）の左
右両端域（Ｌ）（Ｒ）を覆うとともに、タイヤ軸方向最
外方に位置する帯体（９Ｂ）で内外複数のベルト層（３
）（４）における両端縁を同時に覆ってから当該帯体（
９）をタイヤ中心Ｏ−Ｏ側に向って折返し、該折返した
左右の帯体（９）を、前記巻付け始端（９Ａ）（９Ａ）
を越えてタイヤ軸方向内方に密接状に巻付けてベルト層
（３）（４）の中央域（Ｓ）を覆うとともに、該中央域
（Ｓ）において左右の帯体（９）をタイヤ周方向長さの
１／３以下でオーバーラップして成形することを特徴と
するラジアルタイヤにおける補強キャッププライの成形
方法。(1) Carcass with radial cord arrangement (2
) are arranged with a plurality of inner and outer belt layers (3) and (4) in which cords are arranged at shallow angles in the circumferential direction of the tire. (8
) is embedded in a flat plate-shaped band (9) that is wound spirally to cover the belt layers (3) and (4), in a method for forming a reinforcing cap ply (5), comprising: winding the band (9); The starting ends (9A) (9A) are located on both left and right sides of the tire center O-O, and each of the starting ends (9A)
From (9A), the band (9) is tightly wrapped 2 to 6 times outward in the tire axial direction for each left and right side to cover both left and right end areas (L) and (R) of the belt layers (3) and (4). , the belt body (9B) located at the outermost side in the tire axial direction has a plurality of inner and outer belt layers (3
)(4), and then cover both ends of the band at the same time (
9) toward the tire center O-O side, and the folded left and right bands (9) are wrapped around the winding starting ends (9A) (9A).
The belt layers (3) and (4) are wrapped tightly inward in the axial direction of the tire to cover the central region (S) of the belt layers (3) and (4), and the left and right belts (9) are wrapped around the tire in the central region (S). A method for forming a reinforcing cap ply for a radial tire, the method comprising forming a reinforcing cap ply with an overlap of 1/3 or less of the length in the direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2338916A JPH04201553A (en) | 1990-11-30 | 1990-11-30 | Method for molding reinforced cap ply in radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2338916A JPH04201553A (en) | 1990-11-30 | 1990-11-30 | Method for molding reinforced cap ply in radial tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04201553A true JPH04201553A (en) | 1992-07-22 |
Family
ID=18322542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2338916A Pending JPH04201553A (en) | 1990-11-30 | 1990-11-30 | Method for molding reinforced cap ply in radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04201553A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751012A1 (en) * | 1995-06-29 | 1997-01-02 | Semperit Reifen Aktiengesellschaft | Tyres |
| JP2002019415A (en) * | 2000-07-06 | 2002-01-23 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| KR100778545B1 (en) * | 2006-03-30 | 2007-11-22 | 금호타이어 주식회사 | Tire with capply for inclined property |
| CN102582367A (en) * | 2011-01-14 | 2012-07-18 | 株式会社普利司通 | Pneumatic tire and method of forming circumferential belt layer of the same |
| US20140332130A1 (en) * | 2013-05-10 | 2014-11-13 | Bridgestone Corporation | Tire and method of producing the same |
| WO2020217913A1 (en) * | 2019-04-24 | 2020-10-29 | 横浜ゴム株式会社 | Pneumatic tire production method |
-
1990
- 1990-11-30 JP JP2338916A patent/JPH04201553A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751012A1 (en) * | 1995-06-29 | 1997-01-02 | Semperit Reifen Aktiengesellschaft | Tyres |
| JP2002019415A (en) * | 2000-07-06 | 2002-01-23 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP4486226B2 (en) * | 2000-07-06 | 2010-06-23 | 住友ゴム工業株式会社 | Pneumatic tire |
| KR100778545B1 (en) * | 2006-03-30 | 2007-11-22 | 금호타이어 주식회사 | Tire with capply for inclined property |
| CN102582367A (en) * | 2011-01-14 | 2012-07-18 | 株式会社普利司通 | Pneumatic tire and method of forming circumferential belt layer of the same |
| US20140332130A1 (en) * | 2013-05-10 | 2014-11-13 | Bridgestone Corporation | Tire and method of producing the same |
| US9321230B2 (en) * | 2013-05-10 | 2016-04-26 | Bridgestone Corporation | Tire having circumferential reinforcement layer with at least two spirally wound strips |
| US9931800B2 (en) | 2013-05-10 | 2018-04-03 | Bridgestone Corporation | Method of producing tire having circumferential reinforcement layer with at least two spirally wound strips |
| WO2020217913A1 (en) * | 2019-04-24 | 2020-10-29 | 横浜ゴム株式会社 | Pneumatic tire production method |
| JP2020179566A (en) * | 2019-04-24 | 2020-11-05 | 横浜ゴム株式会社 | Manufacturing method of pneumatic tire |
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