JP2000198314A - Radial-ply tire - Google Patents
Radial-ply tireInfo
- Publication number
- JP2000198314A JP2000198314A JP11003975A JP397599A JP2000198314A JP 2000198314 A JP2000198314 A JP 2000198314A JP 11003975 A JP11003975 A JP 11003975A JP 397599 A JP397599 A JP 397599A JP 2000198314 A JP2000198314 A JP 2000198314A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- rubber
- radial
- weft
- yarn
- 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
- 239000004744 fabric Substances 0.000 claims abstract description 30
- 238000005304 joining Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ラジアルプラィ
タィヤの改良に関するもので、特に、タイヤのサイドウ
オール部における凹凸現象の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a radial plyer, and more particularly, to an improvement in an unevenness phenomenon in a sidewall portion of a tire.
【０００２】[0002]
【従来技術】従来より、乗用車ないしトラックバス用ラ
ジアルタイヤに使用されるすだれ織物のカーカスコード
は、裁断後および成形時に接合する場合、通常重ね合わ
せ接合が行なわれている。このような重ね継ぎしたカー
カスプライまたはバンドを使用して形成された円筒状グ
リーンタイヤは、トロイド状のタイヤ形状に拡大変形さ
せると、その重ね合わせ部の円周方向の抗張力は、その
他の部分に比べ著しく大きく、重ね合わせ部のコード間
隔は、他の部分に比べて広がりにくい。2. Description of the Related Art Conventionally, when a carcass cord of a blind fabric used for a radial tire for a passenger car or a truck bus is joined after cutting and molding, lap joining is usually performed. When a cylindrical green tire formed by using such a carcass ply or a band that is overlapped is expanded and deformed into a toroidal tire shape, the tensile strength in the circumferential direction of the overlapped portion is reduced to other portions. The gap between the cords in the overlapped portion is harder to spread than in other portions.
【０００３】この状態は、加硫成型後も残存し、リム組
みして内圧を充填すると、タイヤのサイドウオール部に
外観上凹部を生起する。この凹みは、性能上支障がなく
ても外観上から顧客に忌避されるので不良品として格付
げされる。これを防ぐ対策として、特開昭54-38975号公
報、特開昭55-156704 号公報などが提案されているが、
問題は完全に解決されたとは言えない。[0003] This state remains even after vulcanization molding, and when the rim is assembled and filled with internal pressure, a concave portion is formed in the sidewall portion of the tire in appearance. Even if there is no hindrance in performance, the dent is repelled by the customer from the external appearance, and is therefore classified as defective. As measures to prevent this, JP-A-54-38975 and JP-A-55-156704 have been proposed.
The problem has not been completely solved.
【０００４】また、ゴム被覆すだれ織物を突き合わせ接
合して、上記の問題を解決する方策もある。しかし、こ
の場合、突き合わせ接合部は、緯糸が切断されて不連続
になつているため、すだれ織物は緯糸による横方向の連
結はなく、径糸がゴムだけのつながりによつて構成され
ることになる。なお、一般にタイヤの補強プライに使用
されるすだれ織物は、コードの配列乱れを防ぐ目的で、
細い緯糸（綿、ナイロン、ポリエステルなど）が打込ま
れているものであり、円筒状のグリーンタイヤをトロイ
ド状に拡大変形させると、上記の突き合わせ接合ではそ
の突合せ部は、緯糸がはいつている他の部分に比べ、円
周方向の抗張力が著しく弱く、そのためコード間隔が広
がり、コード間隔を均一に維持することが出来ない。[0004] There is also a method for solving the above problem by butt-joining a rubber-coated blind fabric. However, in this case, the butt joint is discontinuous because the weft is cut, so the blind fabric is not connected in the horizontal direction by the weft, and the diameter yarn is formed by the connection of only rubber. Become. In addition, the blind fabric generally used for the reinforcement ply of the tire is intended to prevent the cord from being disordered,
Thin wefts (cotton, nylon, polyester, etc.) are driven in. When a cylindrical green tire is expanded and deformed into a toroidal shape, the butt joints in the above butt joints have a weft. The tensile strength in the circumferential direction is remarkably weaker than other parts, so that the cord interval is widened and the cord interval cannot be maintained uniform.
【０００５】この状態の程度の大きいものは、タイヤ性
能に悪影響があるが、程度が少なくて、タイヤ性能上支
障のないものでも、リム組みして内圧充填した場合に、
サイドウオール部に外観上凸部を生起するため顧客に忌
避されるので不良品として格付けされることになる。こ
れを防ぐ対策として、特開昭53-136208 号公報に記載の
発明が提案されているが、問題を完全に解決したとは言
えない。[0005] If the degree of this state is large, the tire performance is adversely affected, but even if the degree is small and there is no hindrance in tire performance, when the rim is assembled and the internal pressure is filled,
The appearance of a convex portion in the side wall portion is avoided by the customer, so the product is rated as defective. As a countermeasure to prevent this, the invention described in JP-A-53-136208 has been proposed, but it cannot be said that the problem has been completely solved.
【０００６】[0006]
【発明が解決しようとする課題】そこで、本発明は、ラ
ジアルプラィタィヤにおいて、ゴム被覆すだれ織物の接
合部によるタイヤのサイドウオール部の凹凸現象を解消
することを目的とするものである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to eliminate the unevenness of the sidewall portion of the tire due to the joint of the rubber-coated blind fabric in the radial plyer.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成すべく
鋭意探究の結果、ラジアルプライタイヤのゴム被覆すだ
れ織物の緯糸に高破断伸度を有する糸状体を使用し、該
織物の端部を重ね合わせると共に、そこに所定幅のゴム
テープを使用して接合することにより、簡易にサイドウ
オール部の凹凸現象が解消されることを見出だし、本発
明を完成させたものである。In order to achieve the above object, as a result of diligent search, a thread having a high breaking elongation is used for the weft of a rubber-coated blind fabric of a radial ply tire, and the end of the fabric is cut off. It has been found that by superimposing and joining with a rubber tape having a predetermined width, the unevenness phenomenon of the sidewall portion can be easily eliminated, and the present invention has been completed.
【０００８】すなわち、請求項１記載の発明は、所定幅
内に互いに平行に配列した径糸コードと、この径糸コー
ドにほぼ直角に比較的あらく配列した少なくとも３０％
の高破断伸度を有する緯糸からなるゴム被覆すだれ織物
を、タイヤ赤道面に対してほぼ9O度の角度をなして配し
てラジアルプライタイヤを構成し、この構成におけるゴ
ム被覆すだれ織物の接合部を、径糸コード方向に相互に
平行に重ね合わせ、その重ね合わせ部を幅５〜４０ｍ
ｍ、厚さ０．３〜１．０ｍｍのゴムテープにて被覆して
なるラジアルプライタイヤである。That is, according to the first aspect of the present invention, the diameter yarn cords arranged parallel to each other within a predetermined width, and at least 30%
A rubber-coated blind fabric made of a weft having a high breaking elongation is arranged at an angle of about 90 degrees with respect to the equatorial plane of the tire to constitute a radial ply tire. Are superposed in parallel with each other in the direction of the diameter cord, and the superimposed portion has a width of 5 to 40 m.
m, a radial ply tire coated with a rubber tape having a thickness of 0.3 to 1.0 mm.
【０００９】[0009]
【発明の実施の形態】この発明に使用されるすだれ織物
としては、径糸コードは、通常、ポリエステル、ナイロ
ン、レ−ヨン等を使用し、緯糸は、すだれ織物の接着処
理のための浸潰処理後における切断強力が１００ｇ〜６
００ｇ、切断伸度が３０％〜２００％の高伸度糸を使用
するのが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION As the interwoven fabric used in the present invention, the yarn cord is usually made of polyester, nylon, rayon or the like, and the weft is immersed for the adhesive treatment of the interwoven fabric. Cutting strength after treatment is 100 g to 6 g
It is preferable to use a high elongation yarn having a cut elongation of 30 g to 200%.
【００１０】上記のすだれ織物を使用するラジアルプラ
イの構成は、タイヤ製造工程において、ゴムを被覆した
すだれ織物の裁断時、および、タイヤ成形ドラム上で円
筒状グリーンタイヤ成形時でのすだれ織物の重ね合わせ
接合部分に、図１に一例を示すように、ゴム被覆したす
だれ織物（ＴＦ）の端部を重ね合わせ、ゴムテープ
（３）を貼付ける。ゴムテープ（３）は、完成タイヤの
外表面より見て、各すだれ織物の外側面にゴムテープが
形成される様に貼付される。この場合、ゴムテ−プは、
ゴム被覆すだれ織物のゴムと同材質のものを使用するの
が好ましい。The construction of the radial ply using the above-mentioned interwoven fabric is performed in the tire manufacturing process at the time of cutting a rubber-coated interwoven fabric and at the time of forming a cylindrical green tire on a tire forming drum. As shown in an example in FIG. 1, an end portion of a rubber-coated blind fabric (TF) is overlapped on the joining portion, and a rubber tape (3) is attached. The rubber tape (3) is attached so that a rubber tape is formed on the outer surface of each of the blind fabrics as viewed from the outer surface of the finished tire. In this case, the rubber tape is
It is preferable to use the same material as the rubber of the rubber-coated blind fabric.
【００１１】図１において、すだれ織物（ＴＦ）は、径
糸（１）と緯糸（２）から形成されているもので、ゴム
にて被覆処理されているものである。（３）はゴムテー
プで、重ね継ぎ部の外側面に貼着される。（ＴＩＳ）は
タイヤ内側、（ＴＯＳ）はタイヤ外側である。In FIG. 1, a blind fabric (TF) is formed of a diameter yarn (1) and a weft yarn (2), and is covered with rubber. (3) is a rubber tape, which is adhered to the outer surface of the lap joint. (TIS) is the inside of the tire, and (TOS) is the outside of the tire.
【００１２】ゴムテープ（３）の幅は、径糸の重ね幅に
よつて変化するものではあるが、５〜４０ｍｍ（好まし
くは５〜３０ｍｍ）、厚さ０．３〜１．０ｍｍの範囲が
適当である。なお、重ね代はタイヤサイズによつて決定
されるが、径糸２〜１０本が適当である．タイヤのサイ
ドウオール部に生起される凹みの補正をカバーするため
０．３〜１．０のゴム厚が必要である。１．０ｍｍを超
えると、タイヤの均一性（むらのないこと）を悪くし、
一方、０．３ｍｍ未満では凹みをカバーするにはゴム量
が不足するからである。また、幅についても４０ｍｍを
超えると、タイヤの均一性を悪くするだけでなく、タイ
ヤの重量を増加し、コストアップとなり、５ｍｍ未満で
は、サイドウオールの凹みを十分カバーすることはでき
ない。The width of the rubber tape (3) varies depending on the overlapping width of the diameter yarn, but is preferably in the range of 5 to 40 mm (preferably 5 to 30 mm) and the thickness of 0.3 to 1.0 mm. It is. The overlap margin is determined by the tire size, but 2 to 10 diameter yarns are appropriate. A rubber thickness of 0.3 to 1.0 is required to cover the correction of the dent generated in the sidewall portion of the tire. If it exceeds 1.0 mm, the uniformity of the tire (there is no unevenness) deteriorates,
On the other hand, if the thickness is less than 0.3 mm, the rubber amount is insufficient to cover the dent. Further, when the width exceeds 40 mm, not only the uniformity of the tire is deteriorated, but also the weight of the tire increases, and the cost increases. When the width is less than 5 mm, the depression of the sidewall cannot be sufficiently covered.
【００１３】上記のように構成されることによつて、円
筒状グリーンタイヤをトロイド状のタイヤ形状に拡大変
形させるときに、緯糸に破断伸度が３０％以上の高伸度
糸を使用しているため、カーカスプライの各径糸コード
の間隔が均等に拡大し、緯糸が切断することもなく、サ
イドウオールに凸部が発生することもないし、また凹み
もカバーされるものである。しかし、緯糸に破断伸度が
３０％未満の低伸度を使用すると、特に重ね合わせ接合
部に近接する部分の緯糸が過大に伸長されて切断し、コ
ード間隔の乱れを生起し、これがサイドウオールの凸部
発生のおもな誘因となつているものである。[0013] With the above configuration, when the cylindrical green tire is expanded and deformed into a toroidal tire shape, a high elongation yarn having a breaking elongation of 30% or more is used for the weft. Therefore, the intervals between the yarn cords of the carcass ply are evenly expanded, so that the weft is not cut, no convex portion is generated on the side wall, and the dent is covered. However, if a low elongation of less than 30% is used for the weft, the weft in the portion close to the lap joint is excessively elongated and cuts, causing irregularities in the cord spacing, which is caused by side walls. This is a major incentive for the occurrence of convex portions.
【００１４】[0014]
【実施例】次に、実施の一例を示す。カ一カスプライ
に、上記の高伸度糸を緯糸に使用し、径糸にポリエステ
ルコード１５００ｄ/2を使用したすだれ織物（エンド数
２６本／２５ｃｍ）１プライを形成し、スチールベルト
２プライを配設した１７５／７０Ｒ１４の乗用車ラジア
ルタイヤにおいて、このすだれ織物（ＴＦ）の緯糸
（２）に、接着剤浸漬処理後における切断伸度１５０％
の高伸度糸を使用し、更に、該すだれ織物を前記接着剤
浸漬処理し、続いて、該接着剤浸漬処理後のすだれ織物
の両面をゴムで被覆したゴム被覆すだれ織物を、径糸コ
−ドに直角に所定のカ−カスプライ幅に裁断し、径糸コ
−ド方向に相互に平行に重ね合わせ、この重ね継ぎ部
（重ね代は径糸１０本）の外側面に、すだれ織物の被覆
ゴムと同一のゴム組成のゴムテープ（３）幅２０ｍｍ、
厚さ０．５ｍｍのものを使用して成形されたタイヤ１０
０００本についてテストの結果、１００００本中、サイ
ドウオール部の凹凸の発生は、わずか１本（不良率０．
０１％）であったが、緯糸に従来の低伸度糸を使用し、
コムテープを使用しない場合には、１００００本中５１
本（不良率０．５１％）の発生率を見たほどの顕著な相
違による効果を発現したものである。Next, an example of the embodiment will be described. The above-mentioned high elongation yarn is used for the weft, and one ply of a blind fabric (end number: 26/25 cm) using a polyester cord of 1500 d / 2 is formed on the carcass ply. In the 175 / 70R14 passenger car radial tire provided, the weft (2) of the blind fabric (TF) was cut to an elongation of 150% after the adhesive immersion treatment.
Further, the blind fabric is subjected to the adhesive immersion treatment, and then the rubber-coated blind fabric in which both surfaces of the blind fabric after the adhesive immersion treatment are covered with rubber is used as a yarn thread. At a predetermined carcass ply width at right angles to the cord and superimposed on each other in parallel in the direction of the diameter yarn code. Rubber tape of the same rubber composition as the coated rubber (3) width 20 mm,
Tire 10 molded by using one having a thickness of 0.5 mm
As a result of the test on 000 pieces, out of 10,000 pieces, only one piece of the unevenness in the sidewall portion was generated (the defect rate was 0.3%).
01%), but using a conventional low elongation yarn for the weft,
If no comb tape is used, 51 out of 10,000
This is an effect due to a remarkable difference as seen from the occurrence rate of the book (defective rate: 0.51%).
【００１５】[0015]
【発明の効果】以上説明したように、この発明のラジア
ルプライタイヤは、ゴム被覆すだれ織物の端部を接合す
る際に、すだれ織物の緯糸に高破断伸度を有する糸状体
を使用し、径糸コ−ド方向に相互に平行に重ね合わせ、
その重ね合わ部をゴムテープにて被覆したラジアルプラ
イの使用によつて、簡易にサイドウオール部の凹凸現象
の解消にすぐれた効果を得たものである。As described above, the radial ply tire according to the present invention uses a filament having a high breaking elongation for the weft of the blind fabric when joining the ends of the rubber-coated blind fabric, and Superimposed on each other parallel to the yarn code direction,
By using a radial ply whose overlapping portion is covered with a rubber tape, an excellent effect of easily eliminating the unevenness phenomenon of the side wall portion is obtained.
【００１６】これは、ラジアルプライを構成するすだれ
織物の緯糸に破断伸度が３０％以上の高伸度糸を使用し
ているため、タイヤへの内圧充填の際に、各径糸コード
の間隔が均等に拡大し、緯糸が切断することもなく、サ
イドウオールに凸部が発生することもないことと、また
５〜４０ｍｍ（好ましくは５〜３０ｍｍ）、厚さ０．３
〜１．０ｍｍの範囲のテ−プを使用しているので、サイ
ドウオ−ルの凹みもカバーされることによるものであ
る。This is because a high elongation yarn having a breaking elongation of 30% or more is used for the weft of the blind fabric constituting the radial ply. Are evenly expanded, the weft is not cut, no projection is generated on the side wall, and 5 to 40 mm (preferably 5 to 30 mm), and the thickness is 0.3.
Since the tape in the range of 1.0 mm to 1.0 mm is used, the depression of the side wall is also covered.
【図１】図１は、この発明のカーカスコードの接合部の
一実施例を示す部分断面図である。FIG. 1 is a partial sectional view showing one embodiment of a joint portion of a carcass cord according to the present invention.
（ＴＦ）…ゴム被覆したすだれ織物 （１）…径糸 （２）…緯糸 （３）…ゴムテープ (TF) ... rubber-coated blind fabric (1) ... diameter yarn (2) ... weft (3) ... rubber tape
フロントページの続き (72)発明者 水谷 正幸 大阪市西区江戸堀１丁目17番18号 東洋ゴ ム工業株式会社内 (72)発明者 大曲 良則 大阪市西区江戸堀１丁目17番18号 東洋ゴ ム工業株式会社内 Ｆターム(参考） 4F212 AH20 VA02 VC02 VC12 VC13 VC22 VD10 VD18 VL07 Continued on the front page (72) Inventor Masayuki Mizutani 1-17-18 Edobori, Nishi-ku, Osaka-shi Inside Toyo Gum Kogyo Co., Ltd. (72) Inventor Yoshinori Omagari 1-17-18 Edobori, Nishi-ku, Osaka-shi Toyo Gum Kogyo Company F-term (reference) 4F212 AH20 VA02 VC02 VC12 VC13 VC22 VD10 VD18 VL07
Claims (1)
ードと、該径糸コードにほぼ直角に、比較的あらく配列
した少なくとも３０％の高破断伸度を有する緯糸からな
るゴム被覆すだれ織物を、タィヤ赤道面に対して、径糸
をほぼ９０度の角度をなして配してラジアルプライタイ
ヤを構成し、この構成におけるゴム被覆すだれ織物の接
合部を、径糸コード方向に相互に平行に重ね合わせ、そ
の重ね合わせ部を幅５〜４０ｍｍ、厚さ０．３〜１．０
ｍｍのゴムテープにて被覆したことを特徴とするラジア
ルプライタイヤ。1. A rubber-coated weft fabric comprising a warp cord arranged parallel to each other within a predetermined width and a weft yarn having a high breaking elongation of at least 30%, which is arranged relatively at right angles to the warp cord. The radial yarn is arranged at an angle of about 90 degrees with respect to the equatorial plane of the tire to form a radial ply tire. And the overlapping portion is 5 to 40 mm in width and 0.3 to 1.0 in thickness.
A radial ply tire covered with a rubber tape of mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11003975A JP2000198314A (en) | 1999-01-11 | 1999-01-11 | Radial-ply tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11003975A JP2000198314A (en) | 1999-01-11 | 1999-01-11 | Radial-ply tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000198314A true JP2000198314A (en) | 2000-07-18 |
Family
ID=11572071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11003975A Pending JP2000198314A (en) | 1999-01-11 | 1999-01-11 | Radial-ply tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000198314A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006056091A (en) * | 2004-08-19 | 2006-03-02 | Yokohama Rubber Co Ltd:The | Method and apparatus for joining strip member |
| JP2009078655A (en) * | 2007-09-26 | 2009-04-16 | Bridgestone Corp | Tire |
| WO2009110353A1 (en) * | 2008-03-07 | 2009-09-11 | 横浜ゴム株式会社 | Pneumatic tire and process for producing the same |
| CN112976635A (en) * | 2019-12-13 | 2021-06-18 | 通伊欧轮胎株式会社 | Apparatus and method for manufacturing pneumatic tire |
| CN112976942A (en) * | 2019-12-13 | 2021-06-18 | 通伊欧轮胎株式会社 | Pneumatic tire and method for manufacturing same |
| US11712863B2 (en) | 2020-12-24 | 2023-08-01 | Toyo Tire Corporation | Method for manufacturing pneumatic tire |
-
1999
- 1999-01-11 JP JP11003975A patent/JP2000198314A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006056091A (en) * | 2004-08-19 | 2006-03-02 | Yokohama Rubber Co Ltd:The | Method and apparatus for joining strip member |
| JP4617769B2 (en) * | 2004-08-19 | 2011-01-26 | 横浜ゴム株式会社 | Band-shaped member bonding method and band-shaped member bonding apparatus |
| JP2009078655A (en) * | 2007-09-26 | 2009-04-16 | Bridgestone Corp | Tire |
| WO2009110353A1 (en) * | 2008-03-07 | 2009-09-11 | 横浜ゴム株式会社 | Pneumatic tire and process for producing the same |
| CN101965269A (en) * | 2008-03-07 | 2011-02-02 | 横滨橡胶株式会社 | Pneumatic tire and process for producing the same |
| US9962892B2 (en) | 2008-03-07 | 2018-05-08 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for producing the same |
| CN112976635A (en) * | 2019-12-13 | 2021-06-18 | 通伊欧轮胎株式会社 | Apparatus and method for manufacturing pneumatic tire |
| CN112976942A (en) * | 2019-12-13 | 2021-06-18 | 通伊欧轮胎株式会社 | Pneumatic tire and method for manufacturing same |
| US11712863B2 (en) | 2020-12-24 | 2023-08-01 | Toyo Tire Corporation | Method for manufacturing pneumatic tire |
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