JPH106414A - Joining structure of tire shoulder part - Google Patents
Joining structure of tire shoulder partInfo
- Publication number
- JPH106414A JPH106414A JP8162860A JP16286096A JPH106414A JP H106414 A JPH106414 A JP H106414A JP 8162860 A JP8162860 A JP 8162860A JP 16286096 A JP16286096 A JP 16286096A JP H106414 A JPH106414 A JP H106414A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- intermediate rubber
- rubberized
- rubber sheet
- terminal
- 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)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ラジアルタイヤ
のタイヤショルダー部の接合部の構造に係わり、更に詳
しくはタイヤショルダー部において補強コードを埋設し
て成るゴム引きシート（以下カーカス材料と言う）の端
末接合部に発生する凹凸部を改善したタイヤショルダー
部の接合構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a joint portion of a tire shoulder portion of a radial tire, and more particularly to a rubberized sheet (hereinafter referred to as a carcass material) having a reinforcing cord embedded in the tire shoulder portion. The present invention relates to a joint structure of a tire shoulder portion in which an uneven portion generated at a terminal joint portion is improved.
【０００２】[0002]
【従来の技術】従来、ラジアルタイヤの成形工程におい
て、補強コード（繊維コードまたはスチールコード）を
埋設して成るゴム引きシート（以下カーカス材料と言
う）をタイヤ成形ドラムで貼合せる工程が行われている
が、特にタイヤショルダー部におけるカーカス材料の端
末部Ｗａ，Ｗｂの接合部Ｘにおいては、図３に示すよう
に凹部Ｑが発生する。2. Description of the Related Art Conventionally, in a process of forming a radial tire, a step of bonding a rubberized sheet (hereinafter referred to as a carcass material) formed by embedding a reinforcing cord (fiber cord or steel cord) with a tire forming drum has been performed. However, at the joint X between the terminal portions Wa and Wb of the carcass material in the tire shoulder portion, a concave portion Q is generated as shown in FIG.
【０００３】この理由は、カーカス材料の端末部Ｗａ，
Ｗｂの接合部Ｘでは、補強コード１が２層となり、他の
部分に比べてラジアル方向の引張り剛性が２倍となる。
従って、タイヤ製品となった状態で内圧を加えた時、他
の部分に比べて補強コードが伸び難くなり、即ち、ビー
ド固定部から他のビード固定部までの補強コードの荷重
伸び率が異なることにより補強コードの長さに差が生じ
てタイヤショルダー部に凹部が発生し、製品タイヤの外
観上に問題が生ずるものである。[0003] The reason for this is that the terminal parts Wa,
At the joint X of Wb, the reinforcing cord 1 has two layers, and the tensile rigidity in the radial direction is twice as large as that of the other parts.
Therefore, when an internal pressure is applied in a tire product state, the reinforcing cord is less likely to elongate than other parts, that is, the load elongation rate of the reinforcing cord from the bead fixing part to the other bead fixing part is different. As a result, a difference occurs in the length of the reinforcing cord, a recess is formed in the tire shoulder portion, and a problem occurs in the appearance of the product tire.
【０００４】[0004]
【発明が解決しようとする課題】そこで、上記のような
問題を解消するため、例えば、特開平３−１３０１３５
号公報（発明の名称：ラジアルタイヤの製造方法および
ラジアルタイヤ）及び図４（ａ）〜（ｃ）に示すよう
に、カーカス材料の端末部Ｗａ，Ｗｂの２層に重ねた接
合部Ｘの外周面上または図５に示すように、カーカス材
料の端末部Ｗａ，Ｗｂの接合部Ｘ間に、ゴムシート２を
貼合せて特にタイヤサイド部の凹凸（主として凹部）を
改善する方法が提案されている。In order to solve the above-mentioned problems, for example, Japanese Patent Laid-Open No. 3-130135 is disclosed.
Patent Document (Title of Invention: Radial Tire Manufacturing Method and Radial Tire) and FIGS. 4 (a) to 4 (c), the outer periphery of a joint X superposed on two layers of terminal portions Wa and Wb of a carcass material As shown on the surface or as shown in FIG. 5, a method has been proposed in which the rubber sheet 2 is bonded between the joining portions X of the terminal portions Wa and Wb of the carcass material to improve particularly the unevenness (mainly the concave portion) of the tire side portion. I have.
【０００５】この改善発明によれば、製品タイヤに内圧
が加わった時点でゴムシート２が緩衝材となり、ゴムシ
ート２に接した部分の補強コード１が伸び、接合部Ｘ以
外の補強コード１との長さの不均一が解消すると言うも
のである。然しながら、上記図４（ａ）〜（ｃ）に示す
接合部Ｘの外周面上にゴムシート２を貼合せる構成で
は、カーカス材料の接合部Ｘ（スプライス部）の凹部Ｑ
は無視し、外側のボリュームのみによりタイヤの外観を
良くする方法であって、タイヤサイド部の凹凸（主とし
て凹部）を改善する効果は少ない。According to the improved invention, when the internal pressure is applied to the product tire, the rubber sheet 2 becomes a cushioning material, and the reinforcing cord 1 in a portion in contact with the rubber sheet 2 is extended, and the reinforcing cord 1 other than the joint X is in contact with the rubber cord 2. The non-uniformity of the length is eliminated. However, in the configuration in which the rubber sheet 2 is stuck on the outer peripheral surface of the joint X shown in FIGS. 4A to 4C, the concave portion Q of the joint X (splice) of the carcass material is used.
Is a method of improving the appearance of the tire only by the outer volume, and has little effect of improving the unevenness (mainly the concave portion) of the tire side portion.
【０００６】また、図５に示すカーカス材料の端末部Ｗ
ａ，Ｗｂの接合部Ｘ間に、ゴムシート２を貼合せる構造
のものは、カーカス材料の接合部Ｘの端末部Ｗａ，Ｗｂ
においてカーカス材料同志の接触部Ｐが存在し、カーカ
ス材料内に埋設された補強コード１の周方向への自由度
を拘束すると共に、ゴムシート２の層の変形領域も少な
く、上記改善効果は少ないものである。FIG. 5 shows a terminal portion W of a carcass material.
The structure in which the rubber sheet 2 is bonded between the joints X of a and Wb is the terminal part Wa, Wb of the joint X of the carcass material.
In this case, there is a contact portion P between the carcass materials, which restricts the degree of freedom in the circumferential direction of the reinforcing cord 1 embedded in the carcass material, reduces the deformation area of the layer of the rubber sheet 2, and the improvement effect is small. Things.
【０００７】この発明は、かかる従来の課題に着目して
案出されたもので、ゴム引きシート（カーカス材料）の
端末部の接合部間に、中間ゴムシートを介在させる場合
に、接合部の端末部においてカーカス材料同志が接触せ
ず、しかも中間ゴムシート層の変形領域も大きく、タイ
ヤショルダー部の接合部に生ずる凹部を改善することが
出来るタイヤショルダー部の接合構造を提供することを
目的とするものである。The present invention has been devised in view of such a conventional problem. When an intermediate rubber sheet is interposed between the joint portions of the terminal portions of a rubberized sheet (carcass material), the joint portion of the joint portion is formed. It is an object of the present invention to provide a joint structure of a tire shoulder portion in which carcass materials do not contact each other at a terminal portion, and a deformation region of an intermediate rubber sheet layer is large, and a concave portion generated at a joint portion of a tire shoulder portion can be improved. Is what you do.
【０００８】[0008]
【課題を解決するための手段】この発明は上記目的を達
成するため、ゴム引きシートの端末部の接合部間に、前
記接合部の周囲を覆い、かつゴム引きシートの一方の端
末部上から他方のゴム引きシートの端末部内側に中間ゴ
ムシートを介在させて一体的に接合させたことを要旨と
するものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention covers the periphery of the joint between the end portions of the rubberized sheet and covers the end of the rubberized sheet from above one end of the rubberized sheet. The gist is that an intermediate rubber sheet is interposed and integrally joined to the inside of the terminal portion of the other rubberized sheet.
【０００９】前記中間ゴムシートは、ゴム引きシートの
端末部相互が接触しない形態（縦横の寸法）に構成し、
また前記中間ゴムシートの加硫時の重なり代を小さくす
る手段として、以下の式により中間ゴムシートの厚さ
（ｈ）を設定するものである。 ｈ＝δ・Ｇ／Ｔ 但し、δ：中間ゴムシートの単位長さ当たりの変形量 Ｔ：周方向の剪断力 Ｇ：剪断剛性 この発明は上記のように構成され、ゴム引きシートの端
末部の接合部間に、前記接合部の周囲を覆い、かつゴム
引きシートの一方の端末部上から他方のゴム引きシート
の端末部内側に所定の肉厚の中間ゴムシートを介在させ
て一体的に接合させることで、接合部の端末部において
カーカス材料同志が接触せず、しかも中間ゴムシート層
の変形領域も大きく、ゴム引きシートの端末部の接合部
間に生ずるタイヤ周方向への拘束を除去し、補強コード
を周方向へ均一に拡散すると共に、タイヤ加硫成形後に
ゴム引きシートの端末部の接合部（スプライス部）を突
き合わせ状態，或いはゴム引きシートの端末部の重ね合
わせ量を最小限にすることができ、タイヤショルダー部
の接合部に生ずる凹部を有効に改善させることが出来る
ものである。The intermediate rubber sheet is formed in a form (length and width dimensions) in which the terminal portions of the rubberized sheet do not contact each other,
Further, as means for reducing the overlap margin during vulcanization of the intermediate rubber sheet, the thickness (h) of the intermediate rubber sheet is set by the following equation. h = δ · G / T, where δ: amount of deformation per unit length of the intermediate rubber sheet T: shear force in the circumferential direction G: shear rigidity The present invention is configured as described above, and Between the joining portions, an intermediate rubber sheet having a predetermined thickness is interposed so as to cover the periphery of the joining portion, and from one end of the rubberized sheet to the inside of the end of the other rubberized sheet. By doing so, the carcass materials do not come into contact with each other at the end of the joint, and the deformation area of the intermediate rubber sheet layer is also large, eliminating the constraint in the tire circumferential direction generated between the joints of the end of the rubberized sheet. In addition, the reinforcing cord is uniformly diffused in the circumferential direction, and the bonding portion (splice portion) of the end portion of the rubberized sheet is abutted after vulcanization of the tire, or the overlapping amount of the end portion of the rubberized sheet is minimized. Do It can be one in which it is possible to effectively improve the recess exerted on the junction of the tire shoulder portion.
【００１０】[0010]
【発明の実施の形態】以下、添付図面に基づき、この発
明の実施形態を説明する。なお、従来例と同一構成要素
は、同一符号を付して説明は省略する。図１（ａ）〜
（ｃ）は、ゴム引きシート（カーカス材料）の端末部Ｗ
ａ，Ｗｂの接合部Ｘにおける中間ゴムシート２Ａの剪断
変形工程を示す断面図であって、前記ゴム引きシートの
端末部Ｗａ，Ｗｂの接合部Ｘ間に、前記接合部Ｘの周囲
を覆い、かつゴム引きシートの一方の端末部Ｗａ上から
他方のゴム引きシートの端末部Ｗｂ内側に中間ゴムシー
ト２Ａを介在させて一体的に接合させて構成してある。Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 (a)-
(C) is a terminal portion W of a rubberized sheet (carcass material).
It is sectional drawing which shows the shear deformation process of 2 A of intermediate | middle rubber sheets in the connection part X of a, Wb, Comprising: The periphery of the said connection part X is covered between the connection parts X of the terminal parts Wa and Wb of the said rubberized sheet, In addition, the intermediate rubber sheet 2A is interposed and joined integrally from one end Wa of the rubberized sheet to the inside of the end Wb of the other rubberized sheet.
【００１１】即ち、前記中間ゴムシート２Ａは、ゴム引
きシートの端末部Ｗａ，Ｗｂを重ね合わせた接合部Ｘ
（スプライス部）の領域Ｓを覆うような長さと幅（この
実施形態では、幅１０mm〜２０mm，長さ５０mm〜３００
mm）で、一方の端末部Ｗａ上の領域Ｓａと、他方のゴム
引きシートの端末部Ｗｂの内側の領域Ｓａを覆うように
貼合せてある。That is, the intermediate rubber sheet 2A is formed of a bonding portion X where terminal portions Wa and Wb of a rubberized sheet are overlapped.
(Splice portion) length and width (in this embodiment, width 10 mm to 20 mm, length 50 mm to 300
mm), the region Sa on one terminal Wa is bonded to cover the region Sa inside the terminal Wb of the other rubberized sheet.
【００１２】従って、他方のゴム引きシートの端末部Ｗ
ｂは、図１（ａ）に示すように階段状に積層され、ゴム
引きシートの端末部Ｗｂの内側の領域Ｓａを覆う中間ゴ
ムシート２Ａの端末部は、他方のゴム引きシートの端末
部Ｗｂの内面側に露出した状態で貼合されている。そし
て、図１（ｂ）及び（ｃ）示すように、成形されたタイ
ヤに内圧をかけた時にゴム引きシートの端末部Ｗａ，Ｗ
ｂ間に貼合せた中間ゴムシート２Ａは、剪断変形すると
共に、タイヤ周方向への拘束を除去し、補強コード１は
タイヤ周方向に均一に拡散し、従来、ゴム引きシートの
端末部Ｗａ，Ｗｂの接合部Ｘにおいて生じていた凹部を
改善することが出来るものである。Therefore, the terminal portion W of the other rubberized sheet
1b, the terminal portion of the intermediate rubber sheet 2A that covers the area Sa inside the terminal portion Wb of the rubberized sheet is laminated stepwise as shown in FIG. It is stuck in a state where it is exposed on the inner surface side. Then, as shown in FIGS. 1B and 1C, when internal pressure is applied to the molded tire, the end portions Wa, W of the rubberized sheet are applied.
The intermediate rubber sheet 2A bonded between the tires b undergoes shear deformation and removes restraint in the tire circumferential direction, and the reinforcing cord 1 diffuses uniformly in the tire circumferential direction. It is possible to improve the concave portion generated at the joint X of Wb.
【００１３】また、タイヤ加硫時の剪断応力による中間
ゴムシート２Ａの永久変形により、ゴム引きシートの端
末部Ｗａ，Ｗｂの成形時における重なり代（ラップ代）
を加硫時に小さくする方法として、ゴムの剪断変形の理
論から中間ゴムシート２Ａの肉厚（ｈ）及び加硫成形後
の重なり代を、図２及び以下の理論式により求めて決
定する。Further, due to permanent deformation of the intermediate rubber sheet 2A due to shear stress during vulcanization of the tire, an overlap margin (lap margin) during molding of the end portions Wa and Wb of the rubberized sheet.
As a method of reducing the thickness during vulcanization, the thickness (h) of the intermediate rubber sheet 2A and the overlap allowance after vulcanization molding are determined from FIG. 2 and the following theoretical formula based on the theory of rubber shear deformation.
【００１４】ｈ＝δ・Ｇ／Ｔ ・・・・ 但し、δ：中間ゴムシートの単位長さ当たりの変形量 従って、ゴム引きシートの端末部Ｗａ，Ｗｂの成形時に
おける重なり代（ラップ代）を剪断変形でゼロとする中
間ゴムシート２Ａの肉厚（ｈ）は、以下の式で近似さ
れるものである。H = δ · G / T ··· where δ is the amount of deformation per unit length of the intermediate rubber sheet. Therefore, the overlap margin (wrap margin) when molding the end portions Wa and Wb of the rubberized sheet. The thickness (h) of the intermediate rubber sheet 2A where is set to zero by shearing deformation is approximated by the following equation.
【００１５】ｈ＝Ｇ／Ｔ ・・・・・ (a).Ｔ：周方向の剪断力（剪断応力） 円環殻の理論（書籍名：材料力学，下巻、出版社：養賢
堂，昭和４１年１月２０日発行）より与えられる周方向
膜刀Ｎθ＝Ｐａ／２ を用いて、図６に示すモデル図に
て剪断応力Ｔを求めると、カーカススプライス量をｖと
すると、Ｔ＝Ｎθ／ｖ＝Ｐａ／２ｖで与えられる。H = G / T (a). T: Shear force in the circumferential direction (shear stress) Theory of annular shell (Title: Material mechanics, Lower volume, Publisher: Yokendo, Showa) When the shear stress T is obtained from the model diagram shown in FIG. 6 using the circumferential membrane sword Nθ = Pa / 2 given on January 20, 41, the carcass splice amount is v, and T = Nθ / V = Pa / 2v.
【００１６】ここで、Ｐは、成形時のインフレート内圧 ａは、ラジアル方向の半径 ｖは、カーカススプライス量 使用数値 Ｐ＝1.0 ×10-2Kgf/mm2 ａ＝92.5mm ｖ＝５ mm (b).Ｇ：剪断剛性 未加硫ゴムの剪断試験により求めた数値を使用する。Here, P is the inflation internal pressure at the time of molding a is the radial radius v is the carcass splice amount Numerical value used P = 1.0 × 10 −2 Kgf / mm 2 a = 92.5 mm v = 5 mm b) .G: Shear rigidity Use the numerical value obtained by the shear test of the unvulcanized rubber.
【００１７】数値：0.068 Kgf/cm2（タイゴム想定） (c). Ｔ＝Ｐａ／２ｖ≒0.0925Kgf/mm2 よって、単位幅当たり0.0925Kgf/mm3 ｈ＝Ｇ／Ｔ＝0.068 ／0.0925≒0.735 mm 今回の実験を行ったシートゲージ 0.7 mm 上述した理論式により計算で算出した中間ゴムシート２
Ａの肉厚（ｈ）で、幅１５mm，長さ３００mmの中間ゴム
シート２Ａを、ゴム引きシートの端末部Ｗａ，Ｗｂの接
合部Ｘ間に挿入した結果、全てのタイヤが加硫後、２mm
以下のスプライス量（貼合せ量）となった。なお、従来
のタイヤ成形ドラム上でのスプライス量は、５mm〜７mm
である。Numerical value: 0.068 Kgf / cm 2 (assuming tie rubber) (c). T = Pa / 2v ≒ 0.0925 Kgf / mm 2 , 0.0925 kgf / mm 3 per unit width h = G / T = 0.068 / 0.0925 ≒ 0.735 mm Sheet gauge used in this experiment 0.7 mm Intermediate rubber sheet 2 calculated by the theoretical formula described above
As a result of inserting the intermediate rubber sheet 2A having a thickness (h) of A and a width of 15 mm and a length of 300 mm between the joints X of the end portions Wa and Wb of the rubberized sheet, all tires are cured by 2 mm after vulcanization.
The following splice amount (lamination amount) was obtained. The splice amount on the conventional tire forming drum is 5 mm to 7 mm.
It is.
【００１８】また、従来のゴム引きシートの端末部Ｗ
ａ，Ｗｂの接合部Ｘ間のみに中間ゴムシート２Ａを介在
させているのに対して、この発明の実施形態では、上述
したようにゴム引きシートの端末部Ｗａ，Ｗｂを重ね合
わせた接合部Ｘ（スプライス部）の領域Ｓを覆うような
長さと幅で、一方の端末部Ｗａ上の領域Ｓａと、他方の
ゴム引きシートの端末部Ｗｂの内側の領域Ｓａを覆うよ
うに貼合せてある結果、接合部Ｘにおける凹部Ｑの値は
７０％以下に改善することが出来た。また、この発明に
より成形されたタイヤを、JASO C 607 で規定された条
件に基づきタイヤユニフォミティを測定した結果、良好
であった。Also, the terminal portion W of the conventional rubberized sheet
While the intermediate rubber sheet 2A is interposed only between the joining portions X of the a and Wb, in the embodiment of the present invention, the joining portions in which the terminal portions Wa and Wb of the rubberized sheet are overlapped as described above. A length and a width covering the region S of the X (splice portion) are attached so as to cover the region Sa on one terminal portion Wa and the region Sa inside the terminal portion Wb of the other rubberized sheet. As a result, the value of the concave portion Q at the joint X could be improved to 70% or less. The tire formed according to the present invention was measured for tire uniformity under the conditions specified by JASO C 607, and was found to be good.
【００１９】[0019]
【発明の効果】この発明は、上記のようにゴム引きシー
トの端末部の接合部間に、前記接合部の周囲を覆い、か
つゴム引きシートの一方の端末部上から他方のゴム引き
シートの端末部内側に中間ゴムシートを介在させて一体
的に接合させたので、接合部の端末部においてカーカス
材料同志が接触せず、しかも中間ゴムシート層の変形領
域も大きく、ゴム引きシートの端末部の接合部間に生ず
るタイヤ周方向への拘束を除去し、補強コードを周方向
へ均一に拡散すると共に、タイヤ加硫成形後にゴム引き
シートの端末部の接合部（スプライス部）を突き合わせ
状態，或いはゴム引きシートの端末部の重ね合わせ量を
最小限にすることができ、タイヤショルダー部の接合部
に生ずる凹部を有効に改善させることが出来る効果があ
る。According to the present invention, as described above, between the joints of the end portions of the rubberized sheet, the periphery of the joint portion is covered, and the other rubberized sheet is covered from one end of the rubberized sheet. Since the intermediate rubber sheet is interposed on the inside of the terminal part and integrally joined, the carcass material does not contact each other at the terminal part of the joint part, and the deformation area of the intermediate rubber sheet layer is large, and the terminal part of the rubberized sheet In this state, the reinforcing cord is uniformly diffused in the circumferential direction, and the joint (splice) at the end of the rubberized sheet is abutted after vulcanization of the tire. Alternatively, it is possible to minimize the amount of overlapping of the end portions of the rubberized sheet, and it is possible to effectively improve the concave portion generated at the joint portion of the tire shoulder portion.
【図１】（ａ）〜（ｃ）は、ゴム引きシート（カーカス
材料）の端末部の接合部における中間ゴムシートの剪断
変形工程を示す断面図である。FIGS. 1A to 1C are cross-sectional views showing a step of shearing and deforming an intermediate rubber sheet at a joint portion of a terminal portion of a rubberized sheet (carcass material).
【図２】中間ゴムシートの剪断変形理論の説明図であ
る。FIG. 2 is an explanatory view of the theory of shear deformation of an intermediate rubber sheet.
【図３】従来のタイヤショルダー部に発生する凹部の説
明図である。FIG. 3 is an explanatory view of a concave portion generated in a conventional tire shoulder portion.
【図４】（ａ）〜（ｃ）は、従来のタイヤショルダー部
に発生する凹部を改善する方法の説明図である。FIGS. 4A to 4C are explanatory views of a conventional method for improving a concave portion generated in a tire shoulder portion.
【図５】従来のタイヤショルダー部に発生する凹部を改
善する他の方法の説明図である。FIG. 5 is an explanatory view of another method for improving a concave portion generated in a conventional tire shoulder portion.
【図６】ゴムの剪断変形の理論を説明するためのカーカ
スの成形スプライス部の解析図である。FIG. 6 is an analysis diagram of a forming splice portion of a carcass for explaining the theory of shear deformation of rubber.
１ 補強コード ２Ａ 中間ゴ
ムシート Ｗａ，Ｗｂ ゴム引きシート（カーカス材料）の端末部 Ｘ ゴム引きシート（カーカス材料）の接合部 Ｑ 凹部 Ｓ ゴム引きシートの端末部を重ね合わせた接合部の領
域 Ｓａ 端末部上の領域及び端末部の内側の領域DESCRIPTION OF SYMBOLS 1 Reinforcement cord 2A Intermediate rubber sheet Wa, Wb Terminal part of rubberized sheet (carcass material) X Joint part of rubberized sheet (carcass material) Q Recess S Area of joint part where terminal part of rubberized sheet is overlapped Sa terminal Area on the part and the area inside the terminal part
Claims (3)
トの端末部を重ね合わせて接合させるタイヤショルダー
部の接合構造において、前記ゴム引きシートの端末部の
接合部間に、前記接合部の周囲を覆い、かつゴム引きシ
ートの一方の端末部上から他方のゴム引きシートの端末
部内側に中間ゴムシートを介在させて一体的に接合させ
たことを特徴とするタイヤショルダー部の接合構造。1. A bonding structure of a tire shoulder portion in which terminal portions of a rubberized sheet formed by embedding a reinforcing cord are overlapped and bonded to each other, between the bonding portions of the terminal portions of the rubberized sheet, around the bonding portion. And an intermediate rubber sheet is interposed from one end of the rubberized sheet to the inside of the end of the other rubberized sheet to integrally join the tire shoulder portion.
の端末部相互が接触しない形態に構成した請求項１に記
載のタイヤショルダー部の接合構造。2. The joint structure for a tire shoulder portion according to claim 1, wherein the intermediate rubber sheet is configured so that end portions of the rubberized sheet do not contact each other.
を小さくする手段として、以下の式により中間ゴムシー
トの厚さ（ｈ）を設定する請求項１または請求項２に記
載のタイヤショルダー部の接合構造。 ｈ＝δ・Ｇ／Ｔ 但し、δ：中間ゴムシートの単位長さ当たりの変形量 Ｔ：周方向の剪断力 Ｇ：剪断剛性3. The tire shoulder according to claim 1, wherein the thickness (h) of the intermediate rubber sheet is set by the following equation as means for reducing the overlap margin during vulcanization of the intermediate rubber sheet. Joint structure of the part. h = δ · G / T, where δ: Deformation amount per unit length of the intermediate rubber sheet T: Shear force in circumferential direction G: Shear rigidity
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16286096A JP3615872B2 (en) | 1996-06-24 | 1996-06-24 | Tire shoulder joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16286096A JP3615872B2 (en) | 1996-06-24 | 1996-06-24 | Tire shoulder joint structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH106414A true JPH106414A (en) | 1998-01-13 |
| JP3615872B2 JP3615872B2 (en) | 2005-02-02 |
Family
ID=15762636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16286096A Expired - Fee Related JP3615872B2 (en) | 1996-06-24 | 1996-06-24 | Tire shoulder joint structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3615872B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114204A1 (en) * | 2006-03-29 | 2007-10-11 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tire |
| JP2007313775A (en) * | 2006-05-26 | 2007-12-06 | Yokohama Rubber Co Ltd:The | Manufacturing method of pneumatic tire |
| JP2009083776A (en) * | 2007-10-02 | 2009-04-23 | Bridgestone Corp | Inner liner for tire, and tire using it |
| DE102013113935A1 (en) | 2012-12-25 | 2014-06-26 | Toyo Tire & Rubber Co., Ltd. | tire |
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|---|---|---|---|---|
| JPS49126975A (en) * | 1973-04-18 | 1974-12-05 | ||
| JPS5684940A (en) * | 1979-11-15 | 1981-07-10 | Mitsuboshi Belting Ltd | Bonding technique for vulcanized synthetic rubber waterproof sheet |
| JPS5876246A (en) * | 1981-10-30 | 1983-05-09 | Toyo Tire & Rubber Co Ltd | Method of cutting and joining rubberized cord and rubberized cord in cord cutter |
| JPH03130135A (en) * | 1989-07-04 | 1991-06-03 | Bridgestone Corp | Manufacture of radial tire and radial tire |
| JPH03169536A (en) * | 1989-11-29 | 1991-07-23 | Yokohama Rubber Co Ltd:The | Manufacture of pneumatic tire |
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1996
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49126975A (en) * | 1973-04-18 | 1974-12-05 | ||
| JPS5684940A (en) * | 1979-11-15 | 1981-07-10 | Mitsuboshi Belting Ltd | Bonding technique for vulcanized synthetic rubber waterproof sheet |
| JPS5876246A (en) * | 1981-10-30 | 1983-05-09 | Toyo Tire & Rubber Co Ltd | Method of cutting and joining rubberized cord and rubberized cord in cord cutter |
| JPH03130135A (en) * | 1989-07-04 | 1991-06-03 | Bridgestone Corp | Manufacture of radial tire and radial tire |
| JPH03169536A (en) * | 1989-11-29 | 1991-07-23 | Yokohama Rubber Co Ltd:The | Manufacture of pneumatic tire |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8900389B2 (en) | 2006-03-29 | 2014-12-02 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tire |
| WO2007114204A1 (en) * | 2006-03-29 | 2007-10-11 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tire |
| US20090173431A1 (en) * | 2006-03-29 | 2009-07-09 | The Yokohama Rubber Co., Ltd. | Method for producing pneumatic tire |
| JP2007313775A (en) * | 2006-05-26 | 2007-12-06 | Yokohama Rubber Co Ltd:The | Manufacturing method of pneumatic tire |
| WO2007138917A1 (en) * | 2006-05-26 | 2007-12-06 | The Yokohama Rubber Co., Ltd. | Method of producing pneumatic tire |
| US7857929B2 (en) | 2006-05-26 | 2010-12-28 | The Yokohama Rubber Co., Ltd. | Method of producing pneumatic tire |
| JP4747950B2 (en) * | 2006-05-26 | 2011-08-17 | 横浜ゴム株式会社 | Pneumatic tire manufacturing method |
| JP2009083776A (en) * | 2007-10-02 | 2009-04-23 | Bridgestone Corp | Inner liner for tire, and tire using it |
| US20140174612A1 (en) * | 2012-12-25 | 2014-06-26 | Toyo Tire & Rubber Co., Ltd. | Pneumatic tire |
| CN103895455A (en) * | 2012-12-25 | 2014-07-02 | 东洋橡胶工业株式会社 | Pneumatic tire |
| JP2014125005A (en) * | 2012-12-25 | 2014-07-07 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| DE102013113935A1 (en) | 2012-12-25 | 2014-06-26 | Toyo Tire & Rubber Co., Ltd. | tire |
| US9409448B2 (en) | 2012-12-25 | 2016-08-09 | Toyo Tire & Rubber Co., Ltd. | Pneumatic tire |
| DE102013113935B4 (en) * | 2012-12-25 | 2018-05-30 | Toyo Tire & Rubber Co., Ltd. | tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3615872B2 (en) | 2005-02-02 |
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