JP4708125B2 - Pneumatic tire manufacturing method and pneumatic tire - Google Patents

Pneumatic tire manufacturing method and pneumatic tire Download PDF

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JP4708125B2
JP4708125B2 JP2005257531A JP2005257531A JP4708125B2 JP 4708125 B2 JP4708125 B2 JP 4708125B2 JP 2005257531 A JP2005257531 A JP 2005257531A JP 2005257531 A JP2005257531 A JP 2005257531A JP 4708125 B2 JP4708125 B2 JP 4708125B2
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belt
ribbon material
winding
wound
pneumatic tire
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JP2007069408A (en
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識哲 野間
和紀 川上
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Description

本発明は、複数本の並列したコードをゴム被覆してなるリボン材を周方向に沿って巻き付けることでベルト補助層を形成する空気入りタイヤの製造方法、及び、該ベルト補助層をベルト層の外周側に備えてなる空気入りタイヤに関するものである。   The present invention provides a pneumatic tire manufacturing method in which a belt auxiliary layer is formed by wrapping a ribbon material formed by covering a plurality of parallel cords with rubber along the circumferential direction, and the belt auxiliary layer is formed on the belt layer. The present invention relates to a pneumatic tire provided on the outer peripheral side.

ベルト層は、例えば、タイヤ周方向に対して傾斜して延びるスチールコードにより構成されたベルトを、該スチールコードが互いに逆向きに交差するように２枚積層してなり、このベルト層がカーカス層のクラウン部外周に配されることで、たが効果による補強が行われる。ベルト層の外周側には、タイヤ周方向に延びるコードを備えたベルト補助層が配設される場合があり、これにより上記たが効果を補強して高速耐久性等を向上することができる。   The belt layer is formed, for example, by laminating two belts made of steel cords extending obliquely with respect to the tire circumferential direction so that the steel cords cross in opposite directions, and this belt layer is a carcass layer. By being arranged on the outer periphery of the crown portion, reinforcement by the effect is performed. A belt auxiliary layer provided with a cord extending in the tire circumferential direction may be disposed on the outer peripheral side of the belt layer, thereby reinforcing the above-described effects and improving high-speed durability and the like.

従来、ベルト補助層を形成するにあたり、複数本の並列したコードをゴム被覆してなるリボン材を、周方向に沿って巻き付ける方法が用いられている。例えば下記特許文献１〜３には、１本の連続したリボン材を周方向に沿ってらせん状に巻き付けて、ベルト補助層を形成する方法が記載されている。また、下記特許文献４及び５には、２本の独立したリボン材を周方向に沿って互いに逆向きのらせん状に巻き付けて、ベルト補助層を形成する方法が記載されている。上記の方法はいずれも、高速走行時のベルト端部のせり上がり抑制を目的として、各リボン材がベルト端部近傍で折り返し積層されて２層構造をなしている。   Conventionally, when forming a belt auxiliary layer, a method of winding a ribbon material formed by covering a plurality of parallel cords with rubber along the circumferential direction has been used. For example, Patent Documents 1 to 3 below describe a method of forming a belt auxiliary layer by winding a continuous ribbon material in a spiral shape along the circumferential direction. Patent Documents 4 and 5 below describe a method of forming a belt auxiliary layer by winding two independent ribbon members in a spiral shape opposite to each other along the circumferential direction. Each of the above methods has a two-layer structure in which each ribbon material is folded back and laminated in the vicinity of the belt end for the purpose of suppressing the belt end from rising at high speed.

ところが、下記特許文献１〜３に記載された方法では、リボン材が一方向のらせん状に巻き付けられることにより、ベルト補助層の締付けベクトルが片側に偏ってしまうという問題があった。そのため、加硫用モールドにセットしたグリーンタイヤを、モールド内周に密着させるために内圧をかけて膨らませた時（加硫リフト時）に、ベルト層の左右のバランスが崩れてしまい、タイヤのユニフォミティ、特にＬＦＶ（ラテラルフォースバリエーション）に悪影響を及ぼしていた。   However, the methods described in the following Patent Documents 1 to 3 have a problem that the tightening vector of the belt auxiliary layer is biased to one side when the ribbon material is wound in a spiral shape in one direction. Therefore, when the green tire set in the mold for vulcanization is inflated by applying internal pressure to adhere to the inner periphery of the mold (at the time of vulcanization lift), the right and left balance of the belt layer collapses and the tire uniformity Especially, LFV (lateral force variation) was adversely affected.

上記ユニフォミティの問題については、ベルト補助層の締付けベクトルの左右のバランスを確保することが大変重要となってくるが、下記特許文献４及び５に記載された方法はそのことを開示するものではなく、２本のリボン材を互いに逆向きのらせん状に巻き付けるだけでは、タイヤのユニフォミティが十分に改善されない場合があった。
実開平３−５５０３号公報 特公平６−５５５６２号公報 特開平１１−１０５１５２号公報 特開平９−２３９８６３号公報 特開平２−６７１２３号公報 Regarding the above-mentioned uniformity problem, it is very important to secure the right and left balance of the tightening vector of the belt auxiliary layer, but the methods described in Patent Documents 4 and 5 below do not disclose that. There are cases where the uniformity of the tire is not sufficiently improved by simply winding the two ribbon materials in a spiral shape opposite to each other.
Japanese Utility Model Publication No. 3-5503 Japanese Patent Publication No. 6-55562 JP 11-105152 A JP-A-9-239863 JP-A-2-67123

本発明は上記実情に鑑みてなされたものであり、その目的は、タイヤのユニフォミティを向上することができる空気入りタイヤの製造方法及び空気入りタイヤを提供することにある。   This invention is made | formed in view of the said situation, The objective is to provide the manufacturing method and pneumatic tire of a pneumatic tire which can improve the uniformity of a tire.

上記目的は、下記の如き本発明により達成することができる。即ち、本発明に係る空気入りタイヤの製造方法は、複数本の並列したコードをゴム被覆してなるリボン材を、周方向に沿って巻き付けてベルト補助層を形成する空気入りタイヤの製造方法において、一方のベルト端部からベルト中央部にわたる領域に、第１のリボン材をらせん状に巻き付ける第１の巻き付け工程と、他方のベルト端部からベルト中央部にわたる領域に、第２のリボン材を前記第１のリボン材と逆向きのらせん状に巻き付け、ベルト中心線に関して前記第１のリボン材と略対称に配する第２の巻き付け工程とを備え、前記第１の巻き付け工程及び前記第２の巻き付け工程は、それぞれ、ベルト端部近傍で前記リボン材を重ねながら巻き付ける密巻きとしつつ、前記密巻きする領域のベルト中央部側端を、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配し、前記第１の巻き付け工程にて前記第１のリボン材の巻き付け始端と巻き付け終端とを９０〜２７０°ずらすとともに、前記第２の巻き付け工程にて前記第２のリボン材の巻き付け始端と巻き付け終端とを９０〜２７０°ずらし、前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とを、それぞれ円周面上の異なる象限に配するものである。
The above object can be achieved by the present invention as described below. That is, a method for manufacturing a pneumatic tire according to the present invention is a method for manufacturing a pneumatic tire in which a belt auxiliary layer is formed by winding a ribbon material formed by rubber coating a plurality of parallel cords along a circumferential direction. A first wrapping process in which the first ribbon material is spirally wound in a region extending from one belt end to the belt center, and a second ribbon material is applied in a region extending from the other belt end to the belt center. A first winding step and a second winding step, wherein the first ribbon member is wound in a spiral direction opposite to the first ribbon member, and is arranged substantially symmetrically with the first ribbon member with respect to a belt center line. In the winding process, the belt center side end of the region to be tightly wound is bell-belted from the belt center line while the ribbon material is closely wound around the belt end portion. Placed 50 to 90% position of the belt half width toward the end, wrapped with shifting a termination 90-270 ° winding and start of the first ribbon material in the first winding step, the second In the winding step, the winding start end and winding end of the second ribbon material are shifted by 90 to 270 °, and the winding start end and winding end of the first ribbon material and the second ribbon material are respectively set to the circumference. They are placed in different quadrants on the surface .

本発明に係る空気入りタイヤの製造方法によれば、ベルト補助層を構成する第１のリボン材と第２のリボン材とが互いに逆向きのらせん状に巻き付けられており、しかもベルト中心線に関して略対称に配されることにより、ベルト補助層の締付けベクトルの左右のバランスが確保され、加硫リフト時にベルト層の左右のバランスが崩れることがない。更に、ベルト端部近傍では、リボン材を重ねながら巻き付ける密巻きとすることにより、高速走行時のベルト端部のせり上がりを抑制しながら、従来のように折り返し積層する場合に比べてリボン材をより正確に対称的に配することができ、上述の効果と併せてタイヤのユニフォミティを効果的に向上することができる。そして、本発明では、上記のようにリボン材を対称的に巻き付けた場合において、密巻きする領域のベルト中央部側端を、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配することにより、ベルト端部のせり上がりを好適に抑制しつつ、タイヤのユニフォミティをより効果的に向上することができる。   According to the method for manufacturing a pneumatic tire according to the present invention, the first ribbon material and the second ribbon material constituting the belt auxiliary layer are wound in a spiral shape opposite to each other, and with respect to the belt center line. By being arranged approximately symmetrically, the right and left balance of the tightening vector of the belt auxiliary layer is ensured, and the left and right balance of the belt layer is not lost during the vulcanization lift. Furthermore, in the vicinity of the belt end, the ribbon material is wound more closely with the ribbon material than in the conventional case where the belt material is folded and folded while suppressing the rising of the belt end during high-speed traveling by winding the ribbon material. It can arrange more precisely symmetrically and can improve the uniformity of a tire effectively with the above-mentioned effect. And in this invention, when ribbon material is symmetrically wound as mentioned above, the belt center part side end of the area | region which closely winds is 50 to 90% of belt half width toward a belt end part from a belt centerline. By arranging in this position, the uniformity of the tire can be more effectively improved while suitably suppressing the belt end portion from rising.

本発明では、第１のリボン材と第２のリボン材とが巻き付けられる円周面上に、各リボン材の巻き付け始端及び巻き付け終端からなる４つの巻き付け端が配される。そこで、上記のように、各リボン材の巻き付け始端と巻き付け終端とを９０〜２７０°ずらし、それら４つの巻き付け端をそれぞれ円周面上の異なる象限に配することにより、各巻き付け端が周方向で偏在することなく略均等に配される。その結果、タイヤのユニフォミティ、特にＲＦＶ（ラジアルフォースバリエーション）を効果的に向上することができる。   In the present invention, on the circumferential surface around which the first ribbon material and the second ribbon material are wound, four winding ends including the winding start end and winding end of each ribbon material are arranged. Therefore, as described above, the winding start end and the winding end of each ribbon material are shifted by 90 to 270 °, and the four winding ends are arranged in different quadrants on the circumferential surface, so that each winding end is in the circumferential direction. It is almost evenly distributed without being unevenly distributed. As a result, tire uniformity, particularly RFV (radial force variation) can be effectively improved.

上記においては、前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とのずらし角が略９０°であるものが好ましく、これにより各巻き付け端を円周面上でより均等に配することができ、タイヤのユニフォミティをより効果的に向上することができる。   In the above, it is preferable that the shift angle between the winding start end and the winding end of the first ribbon material and the second ribbon material is approximately 90 °, and thereby each winding end is more even on the circumferential surface. The uniformity of the tire can be improved more effectively.

上記において、前記第１のリボン材及び前記第２のリボン材のベルト端部近傍の巻き付け端を含む２周分を、それぞれ周方向に平行に巻き付けるものが好ましい。かかる構成によれば、従来のようにリボン材を折り返し積層することなく、ベルト端部のせり上がりを効果的に抑制することができる。   In the above, it is preferable that two rounds including a winding end in the vicinity of the belt end portion of the first ribbon material and the second ribbon material are wound in parallel in the circumferential direction. According to such a configuration, it is possible to effectively suppress the belt end portion from rising without the ribbon material being folded back and stacked as in the prior art.

上記において、前記第１の巻き付け工程と前記第２の巻き付け工程とを単一の巻き付け装置を用いて行うものが好ましい。上記特許文献４及び５に記載された方法は、巻き付け時間の短縮を目的として同時に２本のリボン材を用いるものであるため、リボン材を巻き付けるための巻き付け装置を２台使用し、それらを略同時に且つ互いに逆方向に移動させる必要がある。ところが、かかる場合には、各巻き付け装置が独立した駆動系を有することなどに起因して、各リボン材を同一のテンションで巻き付けるのが困難となり、ベルト補助層の締付けベクトルの左右のバランスを確保し難くなる。そこで、本発明の上記構成によれば、各リボン材を同一のテンションで巻き付けることができ、タイヤのユニフォミティをより効果的に向上することができる。   In the above, it is preferable that the first winding step and the second winding step are performed using a single winding device. The methods described in Patent Documents 4 and 5 above use two ribbon materials at the same time for the purpose of shortening the winding time. Therefore, two winding devices for winding the ribbon material are used, and they are substantially omitted. It is necessary to move in the opposite directions at the same time. However, in such a case, it becomes difficult to wind each ribbon material with the same tension due to the fact that each winding device has an independent drive system, and the right and left balance of the tightening vector of the belt auxiliary layer is ensured. It becomes difficult to do. So, according to the said structure of this invention, each ribbon material can be wound with the same tension, and the uniformity of a tire can be improved more effectively.

また、本発明に係る空気入りタイヤは、一対のビードの間に架け渡されるように配されたカーカス層と、前記カーカス層のクラウン部の外周側に配されたベルト層と、前記ベルト層の外周側に配され、複数本の並列したコードをゴム被覆してなるリボン材をタイヤ周方向に沿って巻き付けてなるベルト補助層とを備える空気入りタイヤにおいて、前記リボン材が、一方のベルト端部からベルト中央部にわたる領域にらせん状に巻き付けられた第１のリボン材と、他方のベルト端部からベルト中央部にわたる領域に前記第１のリボン材と逆向きのらせん状に巻き付けられ、ベルト中心線に関して前記第１のリボン材と略対称に配された第２のリボン材とからなり、前記第１のリボン材及び前記第２のリボン材が、それぞれ、ベルト端部近傍で前記リボン材を重ねながら巻き付ける密巻きにされつつ、前記密巻きされた領域のベルト中央部側端が、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配され、前記第１のリボン材及び前記第２のリボン材は、各々の巻き付け始端と巻き付け終端とが９０〜２７０°ずらされており、前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とが、それぞれ円周面上の異なる象限に配されたものである。
The pneumatic tire according to the present invention includes a carcass layer disposed so as to be bridged between a pair of beads, a belt layer disposed on an outer peripheral side of a crown portion of the carcass layer, and the belt layer. A pneumatic tire comprising a belt auxiliary layer that is disposed on the outer peripheral side and is formed by wrapping a ribbon material formed by rubber-coating a plurality of parallel cords along the tire circumferential direction. A first ribbon material spirally wound in a region extending from the belt center to the belt central portion, and a belt wound in a spiral direction opposite to the first ribbon material in a region extending from the other belt end to the belt central portion. A second ribbon material arranged substantially symmetrically with the first ribbon material with respect to a center line, and the first ribbon material and the second ribbon material are respectively arranged in front of the belt end portion. While being tightly wound to wind while overlapping the ribbon material, the belt center side end of the closely coiled region is disposed towards from the belt centerline belt ends 50 to 90% of the position of the belt half width, the In the first ribbon material and the second ribbon material, the winding start end and the winding end of each of the first ribbon material and the second ribbon material are shifted by 90 to 270 °, and the winding start ends of the first ribbon material and the second ribbon material are wound. Each end is arranged in a different quadrant on the circumferential surface .

本発明に係る空気入りタイヤによれば、ベルト補助層を構成する第１のリボン材と第２のリボン材とが互いに逆向きのらせん状に巻き付けられて、ベルト中心線に関して略対称に配されているため、ベルト補助層の締付けベクトルの左右のバランスが確保されており、それによってベルト層の左右のバランスが確保されている。しかも、ベルト端部近傍では、リボン材を重ねながら巻き付ける密巻きにされていることにより、高速走行時のベルト端部のせり上がりを抑制しながら、従来のように折り返し積層する場合に比べてリボン材がより正確に対称的に配されうるため、上述の効果と併せてタイヤのユニフォミティを効果的に向上することができる。そして、上記のようにリボン材が対称的に巻き付けられるとともに、密巻きする領域のベルト中央部側端が、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配されていることにより、ベルト端部のせり上がりを好適に抑制しつつ、タイヤのユニフォミティがより良好となる。   According to the pneumatic tire of the present invention, the first ribbon material and the second ribbon material constituting the belt auxiliary layer are wound in a spiral shape opposite to each other, and are arranged approximately symmetrically with respect to the belt center line. Therefore, the right and left balance of the tightening vector of the belt auxiliary layer is ensured, and thereby the left and right balance of the belt layer is ensured. Moreover, in the vicinity of the end of the belt, the ribbon is wound tightly while overlapping the ribbon material, so that the belt end is prevented from rising at the time of high-speed running, and the ribbon is compared with the case where it is folded and folded as before. Since the materials can be more accurately and symmetrically arranged, the uniformity of the tire can be effectively improved in addition to the above-described effects. As described above, the ribbon material is symmetrically wound, and the belt center side end of the densely wound region is arranged at a position of 50 to 90% of the belt half width from the belt center line toward the belt end. Therefore, the uniformity of the tire becomes better while suitably suppressing the belt end portion from rising.

本発明では、上述のように、各リボン材が巻き付けられた円周面上に４つの巻き付け端が配される。上記構成によれば、各リボン材の巻き付け始端と巻き付け終端とが９０〜２７０°ずらされており、それら４つの巻き付け端がそれぞれ円周面上の異なる象限に配されていることにより、各巻き付け端がタイヤ周方向で偏在することなく略均等に配される。その結果、タイヤのユニフォミティ、特にＲＦＶがより良好となる。   In the present invention, as described above, four winding ends are arranged on the circumferential surface around which each ribbon material is wound. According to the above configuration, the winding start end and the winding end of each ribbon material are shifted by 90 to 270 °, and each of the four winding ends is arranged in a different quadrant on the circumferential surface. The ends are substantially evenly distributed without being unevenly distributed in the tire circumferential direction. As a result, tire uniformity, particularly RFV, is improved.

以下、本発明の実施の形態について図面を参照しながら説明する。図１は、本発明により製造される空気入りタイヤの一例を示す子午線断面図である。図２は、ベルト補助層を構成するリボン材の断面図である。なお、本発明により製造される空気入りタイヤの構造はこれに限られるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a meridian cross-sectional view showing an example of a pneumatic tire manufactured according to the present invention. FIG. 2 is a cross-sectional view of a ribbon material constituting the belt auxiliary layer. In addition, the structure of the pneumatic tire manufactured by this invention is not restricted to this.

この空気入りタイヤは、一対のビード部１と、ビード部１から各々タイヤ径方向外側に延びるサイドウォール部２と、サイドウォール部２の各々の外周側端に連なるトレッド部３とを備える。ビード部１には、鋼線等の収束体をゴム被覆してなる環状のビード１ａと、ビード１ａのタイヤ径方向外側に配され、断面略三角形状をなす硬質ゴムからなるビードフィラー１ｂとが配設されている。   The pneumatic tire includes a pair of bead portions 1, a sidewall portion 2 that extends outward in the tire radial direction from each bead portion 1, and a tread portion 3 that continues to the outer peripheral side end of each sidewall portion 2. The bead portion 1 includes an annular bead 1a formed by covering a converging body such as a steel wire with rubber, and a bead filler 1b made of hard rubber that is disposed on the outer side in the tire radial direction of the bead 1a and has a substantially triangular cross section. It is arranged.

カーカス層４は、タイヤ赤道線Ｃに対して略９０°の角度で配列された複数本のコードがゴム被覆されてなる少なくとも１枚のカーカスプライ９から構成される。カーカスプライ９は、一対のビード１ａの間に架け渡されるように配され、その端部はビード１ａを介して外側に巻き返された状態で係止されている。カーカスプライ９を構成するコードとしては、特に限られるものではないが、スチールやポリエステル、ナイロン、アラミド等の有機系繊維等が好適に使用される。後述するベルト６ａ、６ｂ及びリボン材Ｓを構成するコードについても同様である。   The carcass layer 4 is composed of at least one carcass ply 9 in which a plurality of cords arranged at an angle of about 90 ° with respect to the tire equator line C are covered with rubber. The carcass ply 9 is arranged so as to be bridged between the pair of beads 1a, and the end portions of the carcass plies 9 are locked in a state of being wound outward via the beads 1a. The cord constituting the carcass ply 9 is not particularly limited, but organic fibers such as steel, polyester, nylon, and aramid are preferably used. The same applies to the cords constituting the belts 6a and 6b and the ribbon material S described later.

カーカス層４の内周には、空気圧保持のためのインナーライナー層５が配されている。また、カーカス層４のクラウン部の外周には、たが効果による補強を行うベルト層６が配されている。ベルト層６は、内外に積層された２枚のベルト６ａ、６ｂから構成され、ベルト中心線Ｂがタイヤ赤道線Ｃに略重なるように配置されている。トレッド部３の外周側表面には、トレッドゴム８が配されている。   An inner liner layer 5 for maintaining air pressure is disposed on the inner periphery of the carcass layer 4. In addition, a belt layer 6 that reinforces the shell effect is disposed on the outer periphery of the crown portion of the carcass layer 4. The belt layer 6 is composed of two belts 6a and 6b laminated inside and outside, and is arranged so that the belt center line B substantially overlaps the tire equator line C. A tread rubber 8 is disposed on the outer peripheral surface of the tread portion 3.

ベルト層６の外周には、たが効果を補強するためのベルト補助層７が配されている。ベルト補助層７は、長尺のリボン材Ｓをタイヤ周方向に沿ってらせん状に巻き付けて形成されており、リボン材Ｓは、図２に示すように長手方向に延びて並列した複数本のコード１０を未加硫ゴムにより被覆してなる。なお、リボン材Ｓの厚みや幅、断面形状は特に限定されず、１リボン材中のコード本数は例えば５〜１５本である。   A belt auxiliary layer 7 is provided on the outer periphery of the belt layer 6 to reinforce the effect. The belt auxiliary layer 7 is formed by spirally winding a long ribbon material S along the tire circumferential direction, and the ribbon material S extends in the longitudinal direction as shown in FIG. The cord 10 is coated with unvulcanized rubber. The thickness, width, and cross-sectional shape of the ribbon material S are not particularly limited, and the number of cords in one ribbon material is, for example, 5 to 15.

次に、上記の空気入りタイヤを製造する方法について説明するが、本発明に係る空気入りタイヤの製造方法は、ベルト補助層の形成に関する工程以外は、従来のタイヤ製造工程と同様にして行うことができるため、ベルト補助層の形成を中心に説明する。図３及び４は、本発明に係る空気入りタイヤの製造方法を説明する正面図である。図５は、図４に示す成形ドラムの部分断面図であり、図６は、製造装置の構成の一例を示す概略構成図である。図７は、図４に示す成形ドラムの概略側面図である。   Next, a method for manufacturing the pneumatic tire will be described. The method for manufacturing a pneumatic tire according to the present invention is performed in the same manner as the conventional tire manufacturing process except for the process related to the formation of the belt auxiliary layer. Therefore, the description will focus on the formation of the belt auxiliary layer. 3 and 4 are front views illustrating a method for manufacturing a pneumatic tire according to the present invention. 5 is a partial cross-sectional view of the forming drum shown in FIG. 4, and FIG. 6 is a schematic configuration diagram showing an example of the configuration of the manufacturing apparatus. FIG. 7 is a schematic side view of the forming drum shown in FIG.

まず、図３に示すように、所定の幅寸法を有するベルト６ａ、６ｂを、それぞれ成形ドラム１５の外周面に貼り付けて内外に積層する。各ベルト６ａ、６ｂは、それぞれコード１１ａ、１１ｂがベルト中心線Ｂ（タイヤ赤道線Ｃ）に対して傾斜して延びるように、且つ、該コード１１ａ、１１ｂが互いに逆向きに交差するように配設される。   First, as shown in FIG. 3, belts 6 a and 6 b having a predetermined width dimension are respectively attached to the outer peripheral surface of the forming drum 15 and laminated inside and outside. The belts 6a and 6b are arranged so that the cords 11a and 11b extend while being inclined with respect to the belt center line B (tire equator line C), and the cords 11a and 11b intersect in opposite directions. Established.

次に、図４及び５に示すように、一方のベルト端部ＢＥ１からベルト中央部ＢＣにわたる領域に、リボン材Ｓ１（前記第１のリボン材に相当する。）を周方向に沿ってらせん状に巻き付ける（前記第１の巻き付け工程に相当する。）。更に、他方のベルト端部ＢＥ２からベルト中央部ＢＣにわたる領域に、リボン材Ｓ２（前記第２のリボン材に相当する。）を周方向に沿ってらせん状に巻き付け（前記第２の巻き付け工程に相当する。）、ベルト層６を覆うようにベルト補助層７を形成する。以下、このベルト補助層７を形成する工程について詳述する。   Next, as shown in FIGS. 4 and 5, a ribbon material S1 (corresponding to the first ribbon material) is spirally formed in a circumferential direction in a region extending from one belt end BE1 to the belt center BC. (Corresponding to the first winding step). Further, the ribbon material S2 (corresponding to the second ribbon material) is spirally wound around the region extending from the other belt end BE2 to the belt center BC (in the second winding step). The belt auxiliary layer 7 is formed so as to cover the belt layer 6. Hereinafter, the step of forming the belt auxiliary layer 7 will be described in detail.

リボン材Ｓ（リボン材Ｓ１、Ｓ２）は、例えば図６に示す装置を用いて成形ドラム１５に巻き付けることができる。リボン材Ｓは、巻き付け装置１７より成形ドラム１５に供給され、その巻き付け始端が成形ドラム１５の外周側に固定された状態で、成形ドラム１５を巻き付け装置１７に対してドラム軸方向に相対移動させながらＲ方向に回転させることにより巻き付けられる。巻き付け装置１７の駆動、成形ドラム１５の回転及び移動は、制御装置１８により制御され、リボン材Ｓの巻き付けピッチや周方向に対する傾斜角度が適宜に調節される。   The ribbon material S (ribbon materials S1, S2) can be wound around the forming drum 15 using, for example, the apparatus shown in FIG. The ribbon material S is supplied from the winding device 17 to the forming drum 15, and the forming drum 15 is moved relative to the winding device 17 in the drum axial direction with its winding start end fixed to the outer peripheral side of the forming drum 15. However, it is wound by rotating in the R direction. The driving of the winding device 17 and the rotation and movement of the forming drum 15 are controlled by the control device 18, and the winding pitch of the ribbon material S and the inclination angle with respect to the circumferential direction are adjusted appropriately.

図４に示すように、本実施形態では、リボン材Ｓ１の巻き付け始端Ｅ１がベルト中心線Ｂ近傍に固定された後、ベルト端部ＢＥ１に向かってらせん状に巻き付けられて、巻き付け終端Ｅ２がベルト端部ＢＥ１近傍に固定される。続いて、リボン材Ｓ２の巻き付け始端Ｅ３がベルト中心線Ｂ近傍に固定された後、ベルト端部ＢＥ２に向かってリボン材Ｓ１と逆向きのらせん状に巻き付けられて、巻き付け終端Ｅ４がベルト端部ＢＥ２近傍に固定される。このとき、リボン材Ｓ２は、その巻き付けピッチや周方向に対する傾斜角度が略同じになるように、ベルト中心線Ｂに関してリボン材Ｓ１と略対称に配される。なお、本発明では、各リボン材Ｓ１、Ｓ２を、ベルト端部ＢＥ１、ＢＥ２近傍からベルト中央部ＢＣに向けて巻き付けても構わない。   As shown in FIG. 4, in the present embodiment, after the winding start end E1 of the ribbon material S1 is fixed in the vicinity of the belt center line B, it is wound spirally toward the belt end BE1, and the winding end E2 becomes the belt. It is fixed near the end BE1. Subsequently, after the winding start end E3 of the ribbon material S2 is fixed in the vicinity of the belt center line B, it is wound toward the belt end portion BE2 in a spiral shape opposite to the ribbon material S1, and the winding end E4 becomes the belt end portion. It is fixed in the vicinity of BE2. At this time, the ribbon material S2 is arranged substantially symmetrically with the ribbon material S1 with respect to the belt center line B so that the winding pitch and the inclination angle with respect to the circumferential direction are substantially the same. In the present invention, the ribbon materials S1 and S2 may be wound from the vicinity of the belt end portions BE1 and BE2 toward the belt center portion BC.

本実施形態では、両リボン材Ｓ１、Ｓ２のベルト中央部ＢＣ側の巻き付け端Ｅ１、Ｅ３が、互いに重なることなく、それぞれベルト中心線Ｂ上に配されたうえで、上記のように略対称に巻き付けられている。これにより、ベルト補助層７のベルト中央部ＢＣでの膨らみ又はへこみが抑制され、タイヤのユニフォミティ向上に寄与しうる。なお、リボン材Ｓ２の巻き付けは、リボン材Ｓ１の巻き付けに用いた巻き付け装置１７を用いて行うことが好ましい。これにより、各リボン材Ｓ１、Ｓ２を同一のテンションで巻き付けることができ、タイヤのユニフォミティをより効果的に向上することができる。   In the present embodiment, the winding ends E1 and E3 on the belt center portion BC side of both ribbon materials S1 and S2 are arranged on the belt center line B without overlapping each other, and are substantially symmetrical as described above. It is wound. Thereby, the swelling or dent in the belt center portion BC of the belt auxiliary layer 7 is suppressed, which can contribute to improvement in tire uniformity. The winding of the ribbon material S2 is preferably performed using the winding device 17 used for winding the ribbon material S1. Thereby, each ribbon material S1 and S2 can be wound with the same tension, and the uniformity of a tire can be improved more effectively.

両リボン材Ｓ１、Ｓ２は、ベルト端部ＢＥ１、ＢＥ２近傍で幅方向に一部重ねながら巻き付けられており、かかる密巻きによって高速走行時のベルト端部のせり上がりが効果的に抑制される。本発明では、図５に示すように、密巻きする領域のベルト中央部側端ＣＥが、ベルト中心線Ｂからベルト端部ＢＥ１、ＢＥ２に向かってベルト半幅ＨＷの５０〜９０％の位置、より好ましくは６０〜８０％の位置に配されている。これが、５０％未満の位置であると、上記構成によるユニフォミティの改善代が小さくなる傾向にある。また、９０％を越える位置であると、ベルト端部のせり上がりを抑制する効果が小さくなる傾向にある。   Both ribbon materials S1 and S2 are wound while being partially overlapped in the width direction in the vicinity of the belt end portions BE1 and BE2, and the belt end portion during high-speed running is effectively suppressed by such close winding. In the present invention, as shown in FIG. 5, the belt center side end CE in the closely wound region is located at a position of 50 to 90% of the belt half width HW from the belt center line B toward the belt end BE1 or BE2. Preferably, it is arranged at a position of 60 to 80%. If this is a position of less than 50%, the uniformity improvement by the above configuration tends to be small. Further, when the position exceeds 90%, the effect of suppressing the belt end portion from rising tends to be small.

本実施形態では、密巻きされる領域よりベルト中央部ＢＣ側で、各リボン材Ｓ１、Ｓ２が幅方向に間隔ｄを設けながら巻き付けられている。これにより、リボン材の巻き付けに要する時間を短縮して生産性を向上しうるとともに、側面を突き合わせて巻き付ける方法に比べて制御が容易となる。間隔ｄとしては１〜５ｍｍが例示され、本実施形態の間隔ｄは一律に２ｍｍである。   In the present embodiment, the ribbon materials S1 and S2 are wound around the belt center BC side of the closely wound region while providing an interval d in the width direction. As a result, the time required for winding the ribbon material can be shortened and productivity can be improved, and control can be facilitated as compared with the method in which the side faces are wound together. The interval d is exemplified by 1 to 5 mm, and the interval d in the present embodiment is uniformly 2 mm.

各リボン材Ｓ１、Ｓ２は、ベルト端部近傍の巻き付け端Ｅ２、Ｅ４を含む２周分を、それぞれ周方向に平行に巻き付けられており、これによってベルト端部のせり上がりがより効果的に抑制される。このように、本発明は、リボン材を折り返し積層して巻き付けるものではないので、各リボン材Ｓ１、Ｓ２をより正確に対称的に配することができるとともに、巻き付け動作が簡易化されて制御が容易となる。   Each of the ribbon materials S1 and S2 is wound around two circumferences including the winding ends E2 and E4 in the vicinity of the belt end portion in parallel with each other in the circumferential direction, thereby suppressing the rising of the belt end portion more effectively. Is done. As described above, the present invention does not wrap and wrap the ribbon material, so that the ribbon materials S1 and S2 can be more accurately and symmetrically arranged, and the winding operation is simplified and controlled. It becomes easy.

本実施形態では、図７に示すように、各リボン材Ｓ１、Ｓ２が巻き付けられる円周面上で、リボン材Ｓ１の巻き付け始端Ｅ１と巻き付け終端Ｅ２、及び、リボン材Ｓ２の巻き付け始端Ｅ３と巻き付け終端Ｅ４が、それぞれ９０°ずらして配されており、各巻き付け端Ｅ１〜Ｅ４がずらし角９０°で均等に配されている。これにより、各巻き付け端Ｅ１〜Ｅ４が周方向で偏在することなく、タイヤのユニフォミティが効果的に向上する。なお、かかる効果は、各巻き付け端Ｅ１〜Ｅ４を円周面上の異なる象限に配することにより得られ、各巻き付け端のずらし角は上記に限られるものではない。   In the present embodiment, as shown in FIG. 7, the winding start end E1 and winding end E2 of the ribbon material S1 and the winding start end E3 of the ribbon material S2 are wound on the circumferential surface around which the ribbon materials S1 and S2 are wound. The end points E4 are arranged so as to be shifted by 90 °, and the winding ends E1 to E4 are equally arranged at a shift angle of 90 °. Thereby, the uniformity of a tire improves effectively, without each winding end E1-E4 being unevenly distributed in the circumferential direction. Such an effect is obtained by arranging the winding ends E1 to E4 in different quadrants on the circumferential surface, and the shift angle of each winding end is not limited to the above.

ベルト補助層７を形成した後は、以下に例示するように、従来の製造方法と同様にして空気入りタイヤを製造することができる。即ち、まず、形成したベルト補助層７の外周にトレッドゴム８を配設し、これらとベルト層６とが一体化された円筒状ベルト部材を形成する。次に、ビード１ａを介して端部を巻き返された円筒状のカーカスプライ９を、前記円筒状ベルト部材に内挿し、ビード１ａの間隔を狭めながらカーカスプライ９の中央部を膨出変形させ、カーカスプライ９の外周に前記円筒状ベルト部材を固着一体化する。そして、所定のゴム部材を適宜貼り付けてグリーンタイヤを成形し、加硫用モールドにセットして加硫処理を施す。本発明では、ベルト補助層７の締め付けベクトルの左右のバランスが確保されるため、加硫リフト時にベルト層６の左右のバランスが崩れることがなく、タイヤのユニフォミティを向上することができる。   After forming the belt auxiliary layer 7, as exemplified below, a pneumatic tire can be manufactured in the same manner as in the conventional manufacturing method. That is, first, the tread rubber 8 is disposed on the outer periphery of the formed belt auxiliary layer 7 to form a cylindrical belt member in which these and the belt layer 6 are integrated. Next, the cylindrical carcass ply 9 whose end is wound back through the bead 1a is inserted into the cylindrical belt member, and the central portion of the carcass ply 9 is bulged and deformed while narrowing the interval between the beads 1a. The cylindrical belt member is fixedly integrated on the outer periphery of the carcass ply 9. And a predetermined | prescribed rubber member is affixed suitably, a green tire is shape | molded, it sets to the mold for vulcanization, and a vulcanization process is performed. In the present invention, since the right and left balance of the tightening vector of the belt auxiliary layer 7 is ensured, the right and left balance of the belt layer 6 is not lost during the vulcanization lift, and the tire uniformity can be improved.

以下、本発明の構成と効果を具体的に示す実施例について説明する。   Examples that specifically show the structure and effects of the present invention will be described below.

（１）ＲＦＶ
ＪＩＳＤ４２３３に規定する試験方法に基づいて、ＲＦＶ（ラジアルフォースバリエーション）を測定し、タイヤのユニフォミティを評価した。具体的には、空気圧２００ｋＰａとしたタイヤを荷重６５０Ｎが負荷されるように回転ドラムに押し付け、両軸間隔を一定に保持しながらタイヤを回転させたときに発生する半径方向の力の変動量を測定した。サンプル数は１２とし、その平均値により評価した。変動量が小さいほどユニフォミティに優れていることを示す。 (1) RFV
Based on the test method specified in JIS D 4233, RFV (radial force variation) was measured to evaluate tire uniformity. Specifically, the amount of variation in radial force generated when a tire with an air pressure of 200 kPa is pressed against a rotating drum so as to be loaded with a load of 650 N and the tire is rotated while keeping the distance between both axes constant. It was measured. The number of samples was 12, and the evaluation was based on the average value. The smaller the variation, the better the uniformity.

（２）ＬＦＶ
ＪＩＳＤ４２３３に規定する試験方法に基づいて、ＬＦＶ（ラテラルフォースバリエーション）を測定し、タイヤのユニフォミティを評価した。具体的には、空気圧２００ｋＰａとしたタイヤを荷重６５０Ｎが負荷されるように回転ドラムに押し付け、両軸間隔を一定に保持しながらタイヤを回転させたときに発生するタイヤ横方向の力の変動量を測定した。サンプル数は１２とし、その平均値により評価した。変動量が小さいほどユニフォミティに優れていることを示す。 (2) LFV
Based on the test method specified in JIS D 4233, LFV (lateral force variation) was measured to evaluate tire uniformity. Specifically, the amount of fluctuation in the lateral force generated when a tire with an air pressure of 200 kPa is pressed against a rotating drum so that a load of 650 N is applied, and the tire is rotated while keeping the distance between both axes constant. Was measured. The number of samples was 12, and the evaluation was based on the average value. The smaller the variation, the better the uniformity.

上記試験に供したタイヤは、タイヤサイズが２２５／７０Ｒ１６ １０１Ｓであって、リボン材をタイヤ周方向に沿って巻き付けてなるベルト補助層を備えるものとした。リボン材は、厚み０．８７ｍｍ、幅１４ｍｍの断面矩形状とし、１リボン材中に９４０ｄｔｅｘ／２のナイロンコードが１０本並列したものを使用した。   The tire subjected to the above test had a tire size of 225 / 70R16 101S, and was provided with a belt auxiliary layer formed by winding a ribbon material along the tire circumferential direction. The ribbon material had a rectangular cross section with a thickness of 0.87 mm and a width of 14 mm, and 10 ribbons of 940 dtex / 2 in parallel were used in one ribbon material.

従来例
ベルト端部の一方から他方に向けて、１本の連続したリボン材を周方向に沿ってらせん状に巻き付けてベルト補助層を形成した。リボン材は、幅方向に一律２ｍｍの間隔を設けながら巻き付けられ、各ベルト端部近傍では３０ｍｍ折り返し積層してなる２層構造を形成した。なお、ベルト補助層以外は、前述の実施形態で示したタイヤ構造とした。 Conventional Example A belt auxiliary layer was formed by winding one continuous ribbon material spirally along the circumferential direction from one end of the belt toward the other. The ribbon material was wound with a uniform spacing of 2 mm in the width direction, and a two-layer structure formed by folding back 30 mm near each belt end was formed. Except for the belt auxiliary layer, the tire structure shown in the above embodiment was used.

比較例、実施例１〜５
前述の実施形態で示したように、２本の独立したリボン材を互いに逆向きにらせん状に巻き付け、ベルト中心線に関して略対称に配してベルト補助層を形成した。密巻きした領域のベルト中央部側端の位置は、それぞれ表１に示すとおりである。各リボン材の巻き付け始端と巻き付け終端とは略同じ位置で固定し、巻き付け始端がリボン材間で１８０°ずれるように配した。但し、実施例４については、各リボン材の巻き付け始端と巻き付け終端とのずらし角を９０°とし、４つの巻き付け端を周方向に均等に配した。結果を表１に示す。 Comparative example, Examples 1-5
As shown in the above-described embodiment, two independent ribbon members were spirally wound in opposite directions and arranged substantially symmetrically with respect to the belt center line to form a belt auxiliary layer. Table 1 shows the positions of the ends of the belt in the densely wound region. The winding start end and winding end of each ribbon material were fixed at substantially the same position, and the winding start end was arranged to be shifted by 180 ° between the ribbon materials. However, in Example 4, the shift angle between the winding start end and winding end of each ribbon material was 90 °, and the four winding ends were evenly arranged in the circumferential direction. The results are shown in Table 1.

Figure 0004708125
Figure 0004708125

表１に示すように、実施例は、従来例や比較例に比べてＲＦＶ及びＬＦＶが改善されており、リボン材を対称的に巻き付けた場合において、密巻きする領域のベルト中央部側端を所定の範囲内に配することにより、タイヤのユニフォミティを効果的に向上しうることが分かる。また、実施例４は、実施例３に比べてＲＦＶが大きく改善されており、巻き付け端を周方向に均等に配した効果が認められる。   As shown in Table 1, in the example, RFV and LFV are improved as compared with the conventional example and the comparative example, and when the ribbon material is wound symmetrically, the belt center side end of the region to be tightly wound is shown. It turns out that the uniformity of a tire can be improved effectively by arranging within a predetermined range. Further, in Example 4, the RFV is greatly improved as compared with Example 3, and the effect of evenly arranging the winding ends in the circumferential direction is recognized.

本発明により製造される空気入りタイヤの一例を示す子午線断面図A meridian cross-sectional view showing an example of a pneumatic tire manufactured according to the present invention リボン材の断面図Cross section of ribbon material 本発明に係る空気入りタイヤの製造方法を説明する正面図The front view explaining the manufacturing method of the pneumatic tire concerning the present invention 本発明に係る空気入りタイヤの製造方法を説明する正面図The front view explaining the manufacturing method of the pneumatic tire concerning the present invention 成形ドラムの部分断面図Partial cross section of molding drum 製造装置の構成の一例を示す概略構成図Schematic configuration diagram showing an example of the configuration of a manufacturing apparatus 成形ドラムの概略側面図Schematic side view of molding drum

符号の説明Explanation of symbols

４ カーカス層
６ ベルト層
７ ベルト補助層
１０ コード
１５ 成形ドラム
１７ 巻き付け装置
Ｂ ベルト中心線
ＢＣ ベルト中央部
ＢＥ１ ベルト端部
ＢＥ２ ベルト端部
Ｃ タイヤ赤道線
ＣＥ 密巻きする領域のベルト中央部側端
Ｅ１ 巻き付け始端
Ｅ２ 巻き付け終端
Ｅ３ 巻き付け始端
Ｅ４ 巻き付け終端
ＨＷ ベルト半幅
Ｓ リボン材
Ｓ１ 第１のリボン材
Ｓ１ 第２のリボン材 4 Carcass layer 6 Belt layer 7 Belt auxiliary layer 10 Cord 15 Molding drum 17 Winding device B Belt center line BC Belt center part BE1 Belt end part BE2 Belt end part C Tire equator line CE Belt center part side end E1 Winding end E2 Winding end E3 Winding end E4 Winding end HW Belt half width S Ribbon material S1 First ribbon material S1 Second ribbon material

Claims (5)

複数本の並列したコードをゴム被覆してなるリボン材を、周方向に沿って巻き付けてベルト補助層を形成する空気入りタイヤの製造方法において、
一方のベルト端部からベルト中央部にわたる領域に、第１のリボン材をらせん状に巻き付ける第１の巻き付け工程と、
他方のベルト端部からベルト中央部にわたる領域に、第２のリボン材を前記第１のリボン材と逆向きのらせん状に巻き付け、ベルト中心線に関して前記第１のリボン材と略対称に配する第２の巻き付け工程とを備え、
前記第１の巻き付け工程及び前記第２の巻き付け工程は、それぞれ、ベルト端部近傍で前記リボン材を重ねながら巻き付ける密巻きとしつつ、前記密巻きする領域のベルト中央部側端を、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配し、
前記第１の巻き付け工程にて前記第１のリボン材の巻き付け始端と巻き付け終端とを９０〜２７０°ずらすとともに、前記第２の巻き付け工程にて前記第２のリボン材の巻き付け始端と巻き付け終端とを９０〜２７０°ずらし、
前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とを、それぞれ円周面上の異なる象限に配することを特徴とする空気入りタイヤの製造方法。 In the manufacturing method of a pneumatic tire in which a ribbon material formed by covering a plurality of parallel cords with rubber is wound around the circumferential direction to form a belt auxiliary layer
A first winding step in which a first ribbon material is spirally wound around a region extending from one belt end to the belt center;
A second ribbon material is wound in a spiral shape opposite to the first ribbon material in a region extending from the other belt end to the belt center, and is arranged substantially symmetrically with the first ribbon material with respect to the belt center line. A second winding step,
In each of the first winding step and the second winding step, close winding of the ribbon material in the vicinity of the belt end portion is performed, and the belt center portion side end of the region to be tightly wound is defined as a belt center line. towards the belt end portion arranged to 50-90% of the position of the belt half width from,
In the first winding step, the winding start end and winding end of the first ribbon material are shifted by 90 to 270 °, and the winding start end and winding end of the second ribbon material in the second winding step, Is shifted 90-270 °,
A method of manufacturing a pneumatic tire, characterized in that the winding start end and winding end of the first ribbon material and the second ribbon material are respectively arranged in different quadrants on a circumferential surface . 前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とのずらし角が略９０°である請求項１記載の空気入りタイヤの製造方法。 The method for producing a pneumatic tire according to claim 1 , wherein a shift angle between a winding start end and a winding end of the first ribbon material and the second ribbon material is approximately 90 °. 前記第１のリボン材及び前記第２のリボン材のベルト端部近傍の巻き付け端を含む２周分を、それぞれ周方向に平行に巻き付ける請求項１または２に記載の空気入りタイヤの製造方法。 The method for manufacturing a pneumatic tire according to claim 1 or 2, wherein two rounds including a winding end in the vicinity of a belt end portion of the first ribbon material and the second ribbon material are wound in parallel in the circumferential direction. 前記第１の巻き付け工程と前記第２の巻き付け工程とを単一の巻き付け装置を用いて行う請求項１〜３いずれか１項に記載の空気入りタイヤの製造方法。 The manufacturing method of the pneumatic tire of any one of Claims 1-3 which perform a said 1st winding process and a said 2nd winding process using a single winding apparatus. 一対のビードの間に架け渡されるように配されたカーカス層と、前記カーカス層のクラウン部の外周側に配されたベルト層と、前記ベルト層の外周側に配され、複数本の並列したコードをゴム被覆してなるリボン材をタイヤ周方向に沿って巻き付けてなるベルト補助層とを備える空気入りタイヤにおいて、
前記リボン材が、一方のベルト端部からベルト中央部にわたる領域にらせん状に巻き付けられた第１のリボン材と、他方のベルト端部からベルト中央部にわたる領域に前記第１のリボン材と逆向きのらせん状に巻き付けられ、ベルト中心線に関して前記第１のリボン材と略対称に配された第２のリボン材とからなり、
前記第１のリボン材及び前記第２のリボン材が、それぞれ、ベルト端部近傍で前記リボン材を重ねながら巻き付ける密巻きにされつつ、前記密巻きされた領域のベルト中央部側端が、ベルト中心線からベルト端部に向かってベルト半幅の５０〜９０％の位置に配され、
前記第１のリボン材及び前記第２のリボン材は、各々の巻き付け始端と巻き付け終端とが９０〜２７０°ずらされており、前記第１のリボン材及び前記第２のリボン材の巻き付け始端と巻き付け終端とが、それぞれ円周面上の異なる象限に配されたことを特徴とする空気入りタイヤ。
A carcass layer disposed so as to be bridged between a pair of beads, a belt layer disposed on an outer peripheral side of a crown portion of the carcass layer, and an outer peripheral side of the belt layer, and a plurality of parallel In a pneumatic tire provided with a belt auxiliary layer formed by winding a ribbon material formed by covering a cord with rubber along the tire circumferential direction,
The ribbon material is spirally wound around a region extending from one belt end to the center of the belt, and opposite to the first ribbon material in a region extending from the other belt end to the belt center. A second ribbon material wound in a spiral direction and arranged substantially symmetrically with the first ribbon material with respect to the belt center line;
The first ribbon material and the second ribbon material are respectively wound closely while the ribbon material is piled up in the vicinity of the belt end portion, and the belt central portion side end of the closely wound region is a belt. From the center line toward the belt end, it is placed at a position of 50 to 90% of the belt half width ,
Each of the first ribbon material and the second ribbon material has a winding start end and a winding end shifted by 90 to 270 °, and the winding start ends of the first ribbon material and the second ribbon material A pneumatic tire characterized in that the winding ends are arranged in different quadrants on the circumferential surface .
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JP5282128B2 (en) * 2011-07-28 2013-09-04 住友ゴム工業株式会社 Pneumatic tire manufacturing method
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JP7477746B2 (en) 2020-01-23 2024-05-02 横浜ゴム株式会社 Pneumatic tires

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003182307A (en) * 2001-12-18 2003-07-03 Sumitomo Rubber Ind Ltd Pneumatic radial tire
JP2004189156A (en) * 2002-12-12 2004-07-08 Yokohama Rubber Co Ltd:The Pneumatic tire and manufacturing method thereof
JP2004299659A (en) * 2003-04-01 2004-10-28 Yokohama Rubber Co Ltd:The Pneumatic tire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003182307A (en) * 2001-12-18 2003-07-03 Sumitomo Rubber Ind Ltd Pneumatic radial tire
JP2004189156A (en) * 2002-12-12 2004-07-08 Yokohama Rubber Co Ltd:The Pneumatic tire and manufacturing method thereof
JP2004299659A (en) * 2003-04-01 2004-10-28 Yokohama Rubber Co Ltd:The Pneumatic tire

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