JPH05221204A - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JPH05221204A JPH05221204A JP4028096A JP2809692A JPH05221204A JP H05221204 A JPH05221204 A JP H05221204A JP 4028096 A JP4028096 A JP 4028096A JP 2809692 A JP2809692 A JP 2809692A JP H05221204 A JPH05221204 A JP H05221204A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- carcass layer
- butt
- lap
- spliced
- 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
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気入りラジアルタイヤ
に関し、特にカーカス層のスプライス部に起因してサイ
ドウォール部側面に形成される筋状の凹凸を減少させて
外観を向上させた空気入りラジアルタイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic radial tire, and more particularly to a pneumatic radial tire having reduced appearance of streak-like irregularities formed on a side surface of a sidewall portion due to a splice portion of a carcass layer. Regarding tires.
【０００２】[0002]
【従来の技術】空気入りラジアルタイヤにおいて、その
カーカス層はほぼタイヤ１周分に相当する帯状のカーカ
ス材をタイヤ周方向に沿わせると共に、その両端部を重
ね合わせてラップスプライスさせることにより形成され
ている。このように形成されたカーカス層のラップスプ
ライス部は段差状に厚肉になっているので、タイヤ形成
後にサイドウォール部表面に筋状の凹となって顕れ、タ
イヤ外観を損ねる原因になっている。特に、近年のよう
にタイヤの軽量化対策上からサイドウォールのゴム厚を
次第に薄肉化するにつれ、筋状の凹凸がますます顕著に
あらわれるようになっている。そのため、タイヤの高級
化指向と相まって、その対策が強く要求されるようにな
っている。2. Description of the Related Art In a pneumatic radial tire, its carcass layer is formed by arranging a belt-shaped carcass material corresponding to one tire circumference in the tire circumferential direction and lapping and splicing both end portions thereof. ing. Since the lap splice portion of the carcass layer formed in this manner has a step-like thick wall, it appears as a streak-like recess on the surface of the sidewall portion after the tire is formed, which is a cause of impairing the tire appearance. .. In particular, as the rubber thickness of the sidewall is gradually reduced in order to reduce the weight of the tire as in recent years, streaky irregularities are becoming more and more prominent. Therefore, along with the trend toward higher grade tires, countermeasures against them have been strongly demanded.
【０００３】そこで、サイドウォール側面に形成される
凹凸を減少させる手段として、カーカス層の両端部を重
ね合わせないで突き合わせて接合する、所謂バットスプ
ライスを行うものが提案されている。Therefore, as a means for reducing the unevenness formed on the side wall of the side wall, there has been proposed a so-called butt splicing in which both ends of the carcass layer are abutted and joined without overlapping.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記バ
ットスプライスにする提案はラップスプライスに比べて
接合強度が低いためタイヤ耐久性に問題がある。そのた
め、この欠点を補うため、バットスプライス部の継ぎ合
わせ部分に接着用のゴムを埋め込んでロウ付けする必要
があり、タイヤ生産性が低下するという問題点があっ
た。However, the butt splice proposed above has a problem in tire durability because it has a lower joining strength than the lap splice. Therefore, in order to compensate for this drawback, it is necessary to embed an adhesive rubber in the joint portion of the butt splice portion and braze it, which causes a problem that tire productivity is reduced.
【０００５】本発明の目的は、タイヤ生産性を低下させ
ることなくサイドウォール側面の筋状凹凸を減少させて
外観を向上させることができる空気入りラジアルタイヤ
を提供することにある。An object of the present invention is to provide a pneumatic radial tire capable of reducing streaky irregularities on the side surfaces of sidewalls and improving the appearance thereof without lowering tire productivity.
【０００６】[0006]
【課題を解決するための手段】本発明に係る空気入りラ
ジアルタイヤは、カーカス層のタイヤ周方向に延長する
両端部をバットスプライスさせる一方、このカーカス層
のタイヤ内側に配置した非通気性ゴムからなるインナー
ライナーのタイヤ周方向に延長する両端部をラップスプ
ライスさせ、前記カーカス層のバットスプライス部を前
記インナーライナーのラップスプライス部のラップ域に
配置したことを特徴とするものである。According to the pneumatic radial tire of the present invention, both ends of a carcass layer extending in the tire circumferential direction are butt-spliced, while a non-breathable rubber disposed inside the carcass layer is used. Both ends of the inner liner extending in the tire circumferential direction are lap spliced, and the butt splice portion of the carcass layer is arranged in the lap region of the lap splice portion of the inner liner.
【０００７】上記カーカス層のバットスプライス部はカ
ーカスコードラップを形成しないため、サイドウォール
表面に凹凸を形成することがなく、タイヤ外観を向上さ
せることができる。また、インナーライナーが２層に重
なるラップ部分は他の部分より剛性が大きく変形しにく
いため、カーカス層のバットスプライス部をこの部分に
選択的に配置したことによりカーカス突き合わせ部分の
目開きを防止することができる。このため、ロウ付け作
業を伴うことなくバットスプライスを行うことが可能に
なるので、タイヤ生産性を低下させることもない。Since the butt splice portion of the carcass layer does not form a carcass cord wrap, the tire appearance can be improved without forming irregularities on the sidewall surface. In addition, since the lap portion where the inner liner overlaps with two layers has a higher rigidity and is less likely to be deformed than other portions, the butt splice portion of the carcass layer is selectively arranged at this portion to prevent the carcass butting portion from opening. be able to. For this reason, butt splicing can be performed without the need for brazing work, and thus tire productivity is not reduced.
【０００８】以下、本発明に係る空気入りラジアルタイ
ヤの構成について、添付の図面を参照して説明する。図
１において、１はビード部、２はサイドウォール部、３
はトレッド部である。インナーライナー６は非通気性ゴ
ムから構成されており、タイヤの内面に左右一対のビー
ド部１からサイドウォール部２、トレッド部３に亙って
配置されている。このインナーライナー６の外側におけ
る左右一対のビード部間には、タイヤ周方向に対するコ
ード４ａの角度が実質的に９０°であるカーカス層４が
装架されている。トレッド部３におけるカーカス層４上
には、タイヤ周方向に対するコード５ａの角度が１０°
〜３０°で互いに交差する２層のベルト層５が配置され
ている。The structure of the pneumatic radial tire according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a bead portion, 2 is a sidewall portion, 3
Is the tread part. The inner liner 6 is made of a non-breathable rubber, and is arranged on the inner surface of the tire from the pair of left and right bead portions 1 to the sidewall portion 2 and the tread portion 3. Between the pair of left and right bead portions on the outer side of the inner liner 6, the carcass layer 4 in which the angle of the cord 4a with respect to the tire circumferential direction is substantially 90 ° is mounted. On the carcass layer 4 in the tread portion 3, the angle of the cord 5a with respect to the tire circumferential direction is 10 °.
Two belt layers 5 are arranged which intersect each other at -30 °.
【０００９】図２に示すように、カーカス層４はタイヤ
周方向に延長する両端部がバットスプライスされてい
る。一方、インナーライナー６はタイヤ周方向に延長す
る両端部がラップスプライスされている。カーカス層４
のバットスプライス部１４はインナーライナー６のラッ
プスプライス部１６のラップ域に配置されている。本発
明においては、カーカス層４のバットスプライス部１４
はコードラップを形成しないため、サイドウォール部２
の表面に凹凸が形成されることがなく、タイヤ外観を向
上させることができる。また、変形しにくいインナーラ
イナー６のラップスプライス部１６上にカーカス層４の
バットスプライス部１４を配置することにより、ゴム等
のロウ材を使用しないでバットスプライスを行うことが
できる。この場合、バットスプライス部１４におけるカ
ーカスコード４ａの欠損本数は１本以下にすることが好
ましく、カーカスコード４ａのラップ本数は３本以下に
することが好ましい。As shown in FIG. 2, the carcass layer 4 is butt-spliced at both ends extending in the tire circumferential direction. On the other hand, both ends of the inner liner 6 extending in the tire circumferential direction are lap-spliced. Carcass layer 4
The butt splice portion 14 is disposed in the lap area of the lap splice portion 16 of the inner liner 6. In the present invention, the butt splice portion 14 of the carcass layer 4
Does not form a cord wrap, so the sidewall part 2
The tire appearance can be improved without forming irregularities on the surface of the tire. Further, by arranging the butt splice portion 14 of the carcass layer 4 on the lap splice portion 16 of the inner liner 6 that is difficult to deform, the butt splice can be performed without using a brazing material such as rubber. In this case, the number of defective carcass cords 4a in the butt splice portion 14 is preferably 1 or less, and the number of laps of the carcass cord 4a is preferably 3 or less.
【００１０】また、本発明においては、図３に示すよう
にカーカス層４のバットスプライス部１４上にゴムシー
ト又はゴム引布等からなる目貼シート７を設けることが
できる。この場合、カーカス層４の突き合わせ部分の目
開きをより一層確実に防止することができる。Further, in the present invention, as shown in FIG. 3, a stitching sheet 7 made of a rubber sheet or a rubberized cloth can be provided on the butt splice portion 14 of the carcass layer 4. In this case, it is possible to more surely prevent the opening of the abutting portion of the carcass layer 4.
【００１１】[0011]
【発明の効果】以上説明したように本発明によれば、カ
ーカス層のタイヤ周方向に延長する両端部をバットスプ
ライスさせ、このカーカス層のタイヤ内側に配置した非
通気性ゴムからなるインナーライナーのタイヤ周方向に
延長する両端部をラップスプライスさせ、前記カーカス
層のバットスプライス部を前記インナーライナーのラッ
プスプライス部のラップ域に配置したから、ロウ付け作
業を伴うことなくバットスプライスを行うことが可能に
なり、タイヤ生産性を低下させることなく空気入りラジ
アルタイヤの外観を向上させることができる。As described above, according to the present invention, both ends of the carcass layer extending in the tire circumferential direction are butt spliced, and an inner liner made of a non-breathable rubber disposed inside the carcass layer of the tire. Both ends extending in the tire circumferential direction are lap spliced, and the butt splice portion of the carcass layer is arranged in the lap region of the lap splice portion of the inner liner, so that butt splicing can be performed without brazing work. Thus, the appearance of the pneumatic radial tire can be improved without lowering tire productivity.
【図１】本発明に係る空気入りラジアルタイヤを示す切
欠斜視図である。FIG. 1 is a cutaway perspective view showing a pneumatic radial tire according to the present invention.
【図２】本発明に係る空気入りラジアルタイヤの要部を
示す断面図である。FIG. 2 is a sectional view showing a main part of a pneumatic radial tire according to the present invention.
【図３】本発明に係る空気入りラジアルタイヤの要部の
他の態様を示す断面図である。FIG. 3 is a cross-sectional view showing another aspect of the main part of the pneumatic radial tire according to the present invention.
１ ビード部 ５ ベルト層 ２ サイドウォール部 ５ａ ベルトコード ３ トレッド部 ６ インナーライナ
ー ４ カーカス層 ７ 目貼りシート ４ａ カーカスコード １４ バットスプラ
イス部 １６ ラップスプライス部1 Bead Part 5 Belt Layer 2 Sidewall Part 5a Belt Cord 3 Tread Part 6 Inner Liner 4 Carcass Layer 7 Grading Sheet 4a Carcass Cord 14 Butt Splice Part 16 Lap Splice Part
Claims (1)
端部をバットスプライスさせる一方、このカーカス層の
タイヤ内側に配置した非通気性ゴムからなるインナーラ
イナーのタイヤ周方向に延長する両端部をラップスプラ
イスさせ、前記カーカス層のバットスプライス部を前記
インナーライナーのラップスプライス部のラップ域に配
置した空気入りラジアルタイヤ。1. Both ends of a carcass layer extending in the tire circumferential direction are butt-spliced, while both ends of an inner liner made of non-breathable rubber disposed inside the tire of the carcass layer extending in the tire circumferential direction are wrapped. A pneumatic radial tire in which a butt splice portion of the carcass layer is spliced and is arranged in a lap region of a lap splice portion of the inner liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04028096A JP3087088B2 (en) | 1992-02-14 | 1992-02-14 | Pneumatic radial tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04028096A JP3087088B2 (en) | 1992-02-14 | 1992-02-14 | Pneumatic radial tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05221204A true JPH05221204A (en) | 1993-08-31 |
| JP3087088B2 JP3087088B2 (en) | 2000-09-11 |
Family
ID=12239265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04028096A Expired - Fee Related JP3087088B2 (en) | 1992-02-14 | 1992-02-14 | Pneumatic radial tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3087088B2 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710576A3 (en) * | 1994-11-02 | 1996-10-30 | Uniroyal Englebert Gmbh | Pneumatic vehicle tyre and process for its manufacture |
| US5709760A (en) * | 1995-10-18 | 1998-01-20 | The Goodyear Tire & Rubber Company | Thin gauge, fine diameter steel cord reinforced tire ply fabric which is lap spliced |
| US5746101A (en) * | 1995-01-05 | 1998-05-05 | The Goodyear Tire & Rubber Company | Method for cutting a cord reinforced elastomeric laminate |
| US5762740A (en) * | 1995-01-05 | 1998-06-09 | The Goodyear Tire & Rubber Company | Method for building a laminate from an assembly of tire components to form a casing |
| US6109322A (en) * | 1995-12-15 | 2000-08-29 | The Goodyear Tire & Rubber Company | Laminate composite structure for making an unvulcanized carcass for a radial ply tire as an intermediate article of manufacture |
| WO2000051810A1 (en) * | 1999-03-03 | 2000-09-08 | The Goodyear Tire & Rubber Company | Forming splice joints for elastomeric materials |
| US6280548B1 (en) | 1995-01-05 | 2001-08-28 | Goodyear Tire & Rubber | Method and apparatus for building a laminate and forming a carcass subassembly for a tire |
| US6336488B1 (en) | 1995-12-15 | 2002-01-08 | The Goodyear Tire & Rubber Company | Unvulcanized noncord reinforced subassembly for incorporation in a tire casing |
| US20110061783A1 (en) * | 2008-03-07 | 2011-03-17 | The Yokohama Rubber Co., Ltd. | Pneumatic tire and process for producing the same |
| US20120118465A1 (en) * | 2010-11-15 | 2012-05-17 | Ramendra Nath Majumdar | Pneumatic tire with barrier layer and method of making the same |
| JP2012240658A (en) * | 2011-05-24 | 2012-12-10 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| WO2012169234A1 (en) * | 2011-06-09 | 2012-12-13 | 横浜ゴム株式会社 | Pneumatic tire |
| CN104395103A (en) * | 2012-10-03 | 2015-03-04 | 横滨橡胶株式会社 | Pneumatic tire |
| US20150290890A1 (en) * | 2012-07-31 | 2015-10-15 | The Yokohama Rubber Co., Ltd. | Method for Manufacturing Pneumatic Tire |
| JP2016052789A (en) * | 2015-11-02 | 2016-04-14 | 横浜ゴム株式会社 | Manufacturing method of pneumatic tire |
| CN106347033A (en) * | 2016-10-19 | 2017-01-25 | 安徽佳通乘用子午线轮胎有限公司 | UHP tire for promoting high speed and durability |
| US9895934B2 (en) | 2012-10-03 | 2018-02-20 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
-
1992
- 1992-02-14 JP JP04028096A patent/JP3087088B2/en not_active Expired - Fee Related
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710576A3 (en) * | 1994-11-02 | 1996-10-30 | Uniroyal Englebert Gmbh | Pneumatic vehicle tyre and process for its manufacture |
| US6126780A (en) * | 1995-01-05 | 2000-10-03 | The Goodyear Tire & Rubber Company | Apparatus for building a laminate and forming a subassembly for a tire |
| US5746101A (en) * | 1995-01-05 | 1998-05-05 | The Goodyear Tire & Rubber Company | Method for cutting a cord reinforced elastomeric laminate |
| US5746102A (en) * | 1995-01-05 | 1998-05-05 | The Goodyear Tire & Rubber Company | Method for cutting a cord reinforced elastomeric laminate |
| US5762740A (en) * | 1995-01-05 | 1998-06-09 | The Goodyear Tire & Rubber Company | Method for building a laminate from an assembly of tire components to form a casing |
| US6280548B1 (en) | 1995-01-05 | 2001-08-28 | Goodyear Tire & Rubber | Method and apparatus for building a laminate and forming a carcass subassembly for a tire |
| US5709760A (en) * | 1995-10-18 | 1998-01-20 | The Goodyear Tire & Rubber Company | Thin gauge, fine diameter steel cord reinforced tire ply fabric which is lap spliced |
| US6336488B1 (en) | 1995-12-15 | 2002-01-08 | The Goodyear Tire & Rubber Company | Unvulcanized noncord reinforced subassembly for incorporation in a tire casing |
| US6109322A (en) * | 1995-12-15 | 2000-08-29 | The Goodyear Tire & Rubber Company | Laminate composite structure for making an unvulcanized carcass for a radial ply tire as an intermediate article of manufacture |
| WO2000051810A1 (en) * | 1999-03-03 | 2000-09-08 | The Goodyear Tire & Rubber Company | Forming splice joints for elastomeric materials |
| US20110061783A1 (en) * | 2008-03-07 | 2011-03-17 | The Yokohama Rubber Co., Ltd. | 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 |
| US8454778B2 (en) * | 2010-11-15 | 2013-06-04 | Ramendra Nath Majumdar | Pneumatic tire with barrier layer and method of making the same |
| US20120118465A1 (en) * | 2010-11-15 | 2012-05-17 | Ramendra Nath Majumdar | Pneumatic tire with barrier layer and method of making the same |
| JP2012240658A (en) * | 2011-05-24 | 2012-12-10 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2012254717A (en) * | 2011-06-09 | 2012-12-27 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| CN103596775A (en) * | 2011-06-09 | 2014-02-19 | 横滨橡胶株式会社 | Pneumatic tire |
| WO2012169234A1 (en) * | 2011-06-09 | 2012-12-13 | 横浜ゴム株式会社 | Pneumatic tire |
| US20150290890A1 (en) * | 2012-07-31 | 2015-10-15 | The Yokohama Rubber Co., Ltd. | Method for Manufacturing Pneumatic Tire |
| CN104395103A (en) * | 2012-10-03 | 2015-03-04 | 横滨橡胶株式会社 | Pneumatic tire |
| US9895934B2 (en) | 2012-10-03 | 2018-02-20 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| US10160264B2 (en) | 2012-10-03 | 2018-12-25 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| JP2016052789A (en) * | 2015-11-02 | 2016-04-14 | 横浜ゴム株式会社 | Manufacturing method of pneumatic tire |
| CN106347033A (en) * | 2016-10-19 | 2017-01-25 | 安徽佳通乘用子午线轮胎有限公司 | UHP tire for promoting high speed and durability |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3087088B2 (en) | 2000-09-11 |
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