JP2008094046A - Inspection method of steel cord arrangement direction and apparatus used therefor - Google Patents

Inspection method of steel cord arrangement direction and apparatus used therefor Download PDF

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JP2008094046A
JP2008094046A JP2006281208A JP2006281208A JP2008094046A JP 2008094046 A JP2008094046 A JP 2008094046A JP 2006281208 A JP2006281208 A JP 2006281208A JP 2006281208 A JP2006281208 A JP 2006281208A JP 2008094046 A JP2008094046 A JP 2008094046A
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belt
steel cord
tire
arrangement direction
raw tire
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JP5039358B2 (en
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Shinya Iwayama
伸也 岩山
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Bridgestone Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/0061—Accessories, details or auxiliary operations not otherwise provided for
    • B29D2030/0066—Tyre quality control during manufacturing

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection method of a belt structure which, in judging the steel cord arrangement direction of a belt ply in the state of a raw tire, achieves the judgement with a simple method and an inexpensive apparatus, and to provide an apparatus used therefor. <P>SOLUTION: The raw tire 20 in the middle of its formation is arranged on a predetermined axial line L and then an alternating field having a predetermined intensity is generated using an alternating field generating means 2 that is arranged so as to form a magnetic path in the plane where, if an imaginary raw tire corresponding to the specifications of the raw tire of the above state were arranged on the axial line L, one steel cord contained in the belt ply 21A would outreach in the tire width direction region wherein the belt ply 21A, the object of the direction judgement, is positioned at the outermost layer. The alternating flux density of this magnetic path is measured by a magnetic sensor arranged in the above magnetic path, and based on the measured results the arrangement direction of the steel cord of the belt ply, the object of the judgement, is judged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、平行に配列されたスチールコードよりなるベルトプライを１枚以上積層してなるベルトを有するタイヤの、前記スチールコードの配列方向を判別してベルト構造の良否を検査する方法およびそれに用いられるスチールコード配列方向判別装置に関し、特に、簡易にスチールコードの配列方向を判別することのできるものに関する。   The present invention relates to a method for inspecting the quality of a belt structure by determining the arrangement direction of the steel cords of a tire having a belt formed by laminating one or more belt plies made of steel cords arranged in parallel, and to use the method. More particularly, the present invention relates to an apparatus that can easily determine the arrangement direction of steel cords.

タイヤ製造工程において、万一、ベルトを構成する複数のベルトプライのどれかを貼り忘れたり、その種類を間違えて貼り付けたりした場合、その間違いの発見は、タイヤを加硫したあとの最終工程における、タイヤのユニフォーミエィ検査や、X線による透過検査によっており、ベルト構造の合否を専用に検査する工程は設けられていなかった。   In the tire manufacturing process, if one of the belt plies that make up the belt is forgotten, or the wrong type is applied, the mistake is discovered in the final process after the tire is vulcanized. The tire has undergone uniform inspection and X-ray transmission inspection, and there is no dedicated inspection process for the belt structure.

しかしながら、これでは、不良タイヤが無駄に複数の工程を経たあとやっと工程から排除されることになるので、生産効率を阻害する。そこで、ベルトを形成した工程のすぐあとの工程で前記間違いの有無を検査することが求められていたが、安価な装置でこれを検査する方法がなく、不良タイヤがずっと後の工程で排除されることによる損失と、不良タイヤをすぐ排除するための投資コストとを比較すると、十分にペイさせることができず実用化に至っていない。   However, in this case, defective tires are finally removed from the process after a plurality of processes are uselessly performed, so that production efficiency is hindered. Therefore, it was required to inspect the presence or absence of the mistake in the process immediately after the process of forming the belt, but there is no method of inspecting this with an inexpensive device, and the defective tire is eliminated much later. If the loss due to this and the investment cost for eliminating defective tires immediately are compared, it is not possible to pay enough and it has not been put into practical use.

本発明は、上記の問題点に鑑みてなされたものであり、生タイヤの状態で、ベルトプライのスチールコードの配列方向を判別するに際し、これを、簡易な方法で、しかも安価な装置で実現することのできるベルト構造の検査方法およびそれに用いられる装置を提供することを目的とする。   The present invention has been made in view of the above problems, and in the state of a raw tire, when determining the arrangement direction of the steel cords of the belt ply, this is realized by a simple method and an inexpensive device. It is an object of the present invention to provide a belt structure inspection method and an apparatus used therefor.

＜１＞は、平行に配列されたスチールコードよりなるベルトプライを１枚以上積層してなるベルトを有するタイヤの、前記スチールコードの配列方向を判別してベルト構造の良否を検査すする方法において、
形成途中の生タイヤを所定軸線上に配置した後、
この状態の生タイヤの仕様に合致する仮想生タイヤを前記所定軸線上に配置した場合に、前記判別の対象となるベルトプライが最外層に位置するタイヤ幅方向領域で、このベルトプライに含まれる１本のスチールコードが延在するであろう面内に磁路を形成するよう配置された交番磁界発生手段を用いて所定の強度の交番磁界を発生させ、
前記磁路中に配置された磁気センサでこの磁路の交番磁束密度を測定し、この測定結果に基づいて、前記判別の対象となるベルトプライのスチールコードの配列方向を判別するベルト構造の検査方法である。 <1> is a method for inspecting the quality of a belt structure by determining the arrangement direction of the steel cords of a tire having a belt formed by laminating one or more belt plies made of steel cords arranged in parallel. ,
After placing the raw tire in the process of formation on a predetermined axis,
When a virtual raw tire that matches the specifications of the raw tire in this state is arranged on the predetermined axis, the belt ply to be discriminated is included in this belt ply in a tire width direction region located in the outermost layer. An alternating magnetic field generating means arranged to form a magnetic path in a plane in which one steel cord will extend is generated with an alternating magnetic field of a predetermined strength;
Inspecting the belt structure by measuring the alternating magnetic flux density of the magnetic path with a magnetic sensor disposed in the magnetic path, and determining the arrangement direction of the steel cords of the belt ply to be determined based on the measurement result Is the method.

＜２＞は、＜１＞において、生タイヤを成型する工程において、所定軸線上に配置されたカーカスバンドをトロイダル状にシェーピングし、カーカスバンドにベルトプライを貼り付けたあと、前記判別を行うベルト構造の検査方法である。   <2> is a belt for performing the above determination after shaping a carcass band disposed on a predetermined axis in a toroidal shape and attaching a belt ply to the carcass band in the step of molding a raw tire in <1>. This is a structure inspection method.

＜３＞は、＜１＞もしくは＜２＞において、前記配列方向が赤道面に対する相互に逆向きであり、内側の層の幅が外側の層の幅より広い２層のベルトプライよりなるベルトを有するタイヤに対して、前記仮想生タイヤにおけるそれぞれのベルトプライのスチールコードの延在方向に磁路を形成するよう配置された２台の交番磁界発生手段を用いて両方の層に対する前記判別を行うベルト構造の検査方法である。   <3> is a belt comprising two belt plies in <1> or <2>, wherein the arrangement directions are opposite to each other with respect to the equatorial plane, and the inner layer is wider than the outer layer. The discrimination for both layers is performed using two alternating magnetic field generating means arranged so as to form a magnetic path in the extending direction of the steel cord of each belt ply in the virtual raw tire. This is a belt structure inspection method.

＜４＞は、＜１＞〜＜３＞のいずれかにおいて、前記測定された交番磁束密度の周波数スペクトルにおいて、３次成分のピーク磁束密度が所定の閾値よりも小さい場合に前記ベルト構造が不良であると判定するベルト構造の検査方法である。   <4> is any one of <1> to <3>, wherein the belt structure is defective when the peak magnetic flux density of the third-order component is smaller than a predetermined threshold in the frequency spectrum of the measured alternating magnetic flux density. This is a method for inspecting a belt structure that is determined as follows.

＜５＞は、＜１＞〜＜４＞のいずれかのベルト構造の検査方法に用いられるスチールコード配列方向判別装置であって、
前記交番磁界発生手段と、この交番磁界発生手段によって形成される磁路中に設けられ、この磁路の交番磁束密度を測定する磁気センサと、磁気センサからの交番出力波形を処理してベルトプライのスチールコードの配列方向を判別する判別手段とを具えるスチールコード配列方向判別装置である。 <5> is a steel cord arrangement direction discriminating device used in the belt structure inspection method according to any one of <1> to <4>,
The alternating magnetic field generating means, a magnetic sensor provided in the magnetic path formed by the alternating magnetic field generating means, and measuring the alternating magnetic flux density of the magnetic path, and processing the alternating output waveform from the magnetic sensor to process the belt ply A steel cord arrangement direction discriminating device comprising discriminating means for discriminating the arrangement direction of the steel cords.

＜１＞によれば、形成途中の生タイヤを所定軸線上に配置した後、この状態のタイヤの仕様に合致する仮想タイヤを前記所定軸線上に配置した場合に、前記判別の対象となるベルトプライが最外層に位置するタイヤ幅方向領域で、このベルトプライに含まれる１本のスチールコードが延在するであろう面内に磁路を形成するよう配置された交番磁界発生手段を用いて所定の強度の交番磁界を発生させ、前記磁路中に配置された磁気センサでこの磁路の交番磁束密度を測定し、この測定結果に基づいて、前記判別の対象となるベルトプライのスチールコードの配列方向を判別するので、ベルトプライの種類の選択間違いや、ベルトプライの貼り忘れを安価な装置で実現することができる。   According to <1>, when a green tire that is being formed is arranged on a predetermined axis and then a virtual tire that conforms to the specifications of the tire in this state is arranged on the predetermined axis, the belt that is the object of the determination Using an alternating magnetic field generating means arranged so as to form a magnetic path in a plane in which one steel cord included in the belt ply will extend in a tire width direction region where the ply is located in the outermost layer An alternating magnetic field having a predetermined strength is generated, and an alternating magnetic flux density of the magnetic path is measured by a magnetic sensor disposed in the magnetic path. Based on the measurement result, the steel cord of the belt ply to be discriminated is determined. Therefore, it is possible to realize an erroneous selection of the belt ply type and forgetting to attach the belt ply with an inexpensive device.

＜２＞によれば、生タイヤを成型する工程において、所定軸線上に配置されたカーカスバンドをトロイダル状にシェーピングし、カーカスバンドにベルトプライを貼り付けたあと、前記判別を行うので、もし、ベルトプライの貼り間違いや貼り忘れがあった場合、すぐこれを発見することができ、工程が非効率になるのを防止することができる。   <2> According to <2>, in the step of molding the raw tire, the carcass band disposed on the predetermined axis is shaped into a toroidal shape, and after the belt ply is attached to the carcass band, the determination is performed. If there is a mistake in attaching or forgetting to attach the belt ply, it can be detected immediately, and the inefficiency of the process can be prevented.

＜３＞によれば、前記配列方向が赤道面に対する相互に逆向きであり、内側の層の幅が外側の層の幅より広い２層のベルトプライよりなるベルトを有するタイヤに対して、前記仮想生タイヤにおけるそれぞれのベルトプライのスチールコードの延在方向に磁路を形成するよう配置された２台の交番磁界発生手段を用いて両方の層に対する前記判別を行うので、効率よく両方のベルトプライの方向判別を行うことができる。   According to <3>, for a tire having a belt composed of two layers of belt plies in which the arrangement directions are opposite to each other with respect to the equator plane and the width of the inner layer is wider than the width of the outer layer, In the virtual green tire, since both the layers are discriminated by using the two alternating magnetic field generating means arranged so as to form a magnetic path in the extending direction of the steel cord of each belt ply, both belts can be efficiently used. The ply direction can be determined.

＜４＞によれば、前記測定された交番磁束密度の周波数スペクトルにおいて、３次成分のピーク磁束密度が所定の閾値よりも小さい場合に前記ベルト構造が不良であると判定するので、詳細を後述するように、スチールコードの方向判別を確実に行うことができる。   According to <4>, since the belt structure is determined to be defective when the peak magnetic flux density of the tertiary component is smaller than a predetermined threshold in the measured frequency spectrum of the alternating magnetic flux density, details will be described later. As a result, the direction of the steel cord can be reliably determined.

＜５＞によれば、前記交番磁界発生手段と、この交番磁界発生手段によって形成される磁路中に設けられ、この磁路の交番磁束密度を測定する磁気センサと、磁気センサからの交番出力波形を処理してベルトプライのスチールコードの配列方向を判別する判別手段とを具えるので、簡易で安価な構成の装置を構成することができる。   According to <5>, the alternating magnetic field generating means, the magnetic sensor provided in the magnetic path formed by the alternating magnetic field generating means, and measuring the alternating magnetic flux density of the magnetic path, and the alternating output from the magnetic sensor Since it comprises the discriminating means for processing the waveform and discriminating the arrangement direction of the steel cords of the belt ply, an apparatus having a simple and inexpensive configuration can be configured.

本発明の実施形態について、図を参照して説明する。図１（ａ）は、本実施形態に係るスチールコード配列方向判別装置を示す概略平面図、図１（ｂ）は、これに対応する概略正面図であり、スチールコード配列方向判別装置１は、生タイヤ２０の周囲に形成されたベルト２１を構成する１枚以上のベルトプライ２１Ａ、２１Ｂのそれぞれのスチールコードの、タイヤ赤道面Ｅに対する配列方向を判別するよう機能し、交番磁界を形成する交番磁界発生手段２と、この交番磁界発生手段２によって形成される磁路１３中に設けられ、この磁路１３の交番磁束密度を測定する磁気センサ３と、磁気センサ３からの交番出力波形を処理して、スチールコードの方向判別を行う判別手段１１と、を具えて構成される。   Embodiments of the present invention will be described with reference to the drawings. FIG. 1 (a) is a schematic plan view showing a steel cord arrangement direction discriminating apparatus according to the present embodiment, FIG. 1 (b) is a schematic front view corresponding thereto, and the steel cord arrangement direction discriminating apparatus 1 is An alternating power that functions to determine the arrangement direction of the steel cords of one or more belt plies 21A and 21B constituting the belt 21 formed around the green tire 20 with respect to the tire equatorial plane E and forms an alternating magnetic field. Magnetic field generating means 2, magnetic sensor 3 provided in magnetic path 13 formed by this alternating magnetic field generating means 2, measuring the alternating magnetic flux density of this magnetic path 13, and alternating output waveform from magnetic sensor 3 are processed And a discriminating means 11 for discriminating the direction of the steel cord.

ここで、磁気センサ３としてば、例えば、微少の磁束密度の変化を捉えることのできるホール素子を組み込んだセンサを用いることができる。   Here, as the magnetic sensor 3, for example, a sensor incorporating a Hall element capable of capturing a minute change in magnetic flux density can be used.

交番磁界発生手段２は、所定の軸線Ｌ上に配置された形成途中の生タイヤ２０の外周に近接して配置されるとともに、交番磁界を発生して磁路１３を形成する一対のヨーク４Ａ、４Ｂと、磁界生成回路５と、これらを収納するケース６とを具えて構成され、ケース６は、固定アーム７により支持されている。   The alternating magnetic field generating means 2 is disposed in the vicinity of the outer periphery of the green tire 20 being formed disposed on the predetermined axis L, and generates a magnetic field 13 by generating an alternating magnetic field. 4B, a magnetic field generation circuit 5, and a case 6 for housing them, and the case 6 is supported by a fixed arm 7.

ここで、ケース６は、固定アーム７に対して、回動軸Ｐの周りに回動可能に取り付けられており、前記判別の対象となっている生タイヤ２０の状態（例えば、図示の場合は、トロイダル状に形成されたカーカスバンド上にベルト２１を貼り付けた後、トレッドゴムを貼り付ける前の状態）における生タイヤ仕様に合致する仮想生タイヤを軸線Ｌ上に配置した場合の、判別対象となるベルトプライ（例えばベルトプライ２１Ａ）に含まれるスチールコードが延在するであろう面Ｆ、すなわち、軸線Ｌに直交する赤道面Ｅに対してθだけ傾斜した面の内に磁路を形成されるようセットされており、したがって、ケース６は、ヨーク４Ａ、４Ｂを結ぶ直線が赤道面Ｅに対してθだけ傾斜した面Ｆ内に含まれるようにその方向が固定される。   Here, the case 6 is attached to the fixed arm 7 so as to be rotatable around a rotation axis P, and the state of the raw tire 20 to be determined (for example, in the case of illustration). Discrimination target when a virtual raw tire that conforms to the raw tire specifications in the state after attaching the belt 21 on the toroidal carcass band and before attaching the tread rubber) is arranged on the axis L A magnetic path is formed in a plane F on which a steel cord included in a belt ply (for example, belt ply 21A) will extend, that is, a plane inclined by θ with respect to an equator plane E perpendicular to the axis L. Therefore, the direction of the case 6 is fixed so that the straight line connecting the yokes 4A and 4B is included in the plane F inclined by θ with respect to the equator plane E.

また、同時に、ケース６は、固定アーム７に対して、軸線Ｌ上を移動可能に取り付けられていて、前記仮想生タイヤの仕様において、判別対象にするベルトプライ（例えば内側のベルトプライ２１Ａ）が最外層となっているタイヤ幅方向領域に磁路１３が形成されるようセットされており、すなわち、図示の場合、ケース６は、ヨーク４Ａ、４Ｂを結ぶ直線が、外側のベルトプライ２１Ｂが存在しないタイヤ幅方向領域に含まれるように軸線Ｌ上の位置が固定される。   At the same time, the case 6 is attached to the fixed arm 7 so as to be movable on the axis L, and a belt ply (for example, the inner belt ply 21A) to be discriminated in the specifications of the virtual raw tire is provided. It is set so that the magnetic path 13 is formed in the tire width direction region which is the outermost layer, that is, in the case shown in the figure, the case 6 has a straight line connecting the yokes 4A and 4B and the outer belt ply 21B. The position on the axis L is fixed so as to be included in the tire width direction region.

図２は、判別対象となる生タイヤ２０の状態例を示す図であり、図２（ａ）は正面図、図２（ｂ）は、図２（ａ）のｂ−ｂ断面に対応する断面図であり、また、図３（ａ）は、この状態の生タイヤ２０を半径方向外側の上方から見た平面図、図３（ｂ）は、これを半径方向外側の正面から見た正面図であり、この例の生タイヤ２０の状態は、シェーピングドラム２５上でトロイダル状に膨らんだカーカスバンド２４にベルトプライ２１Ａ、２１Ｂを、それぞれのスチールコードが、赤道面Ｅに対してθ、θ1だけ傾斜するように貼り付けたあとの状態で、かつ、トレッドゴムＴＲが貼り付けられる前の状態の生タイヤ２０を、スチールコードの方向判別の対象とした場合の例である。 FIG. 2 is a diagram illustrating an example of the state of the raw tire 20 to be discriminated. FIG. 2A is a front view, and FIG. 2B is a cross section corresponding to the bb cross section of FIG. FIG. 3A is a plan view of the raw tire 20 in this state as seen from above radially outward, and FIG. 3B is a front view of this seen from the radially outward front. The state of the raw tire 20 in this example is that belt plies 21A and 21B are attached to a carcass band 24 swelled in a toroidal shape on a shaping drum 25, and each steel cord is θ, θ 1 with respect to the equator plane E. This is an example in which the raw tire 20 in a state after being attached so as to be inclined only and before the tread rubber TR is attached is used as a target for discriminating the direction of the steel cord.

そして、この場合、内側ベルトプライ２１Ａのスチールコード方向判別のための交番磁界発生手段２と、外側ベルトプライ２１Ｂのスチールコード方向判別のための交番磁界発生手段２Ａとが相互に干渉しないよう、生タイヤ２０上の異なる周方向位置に、生タイヤ２０の外周に近接して配置される。   In this case, the alternating magnetic field generating means 2 for determining the steel cord direction of the inner belt ply 21A and the alternating magnetic field generating means 2A for determining the steel cord direction of the outer belt ply 21B are prevented from interfering with each other. The tires 20 are arranged at different circumferential positions on the tire 20 and close to the outer periphery of the raw tire 20.

上記説明においては、判別対象を、トレッドゴムＴＲを貼り付ける前の状態としたが、本発明の判別方法は、磁気的測定により判別するものであるから、これを、トレッドゴムＴＲを貼り付けたあとの生タイヤとすることもできる。   In the above description, the discrimination target is the state before the tread rubber TR is pasted. However, since the discrimination method of the present invention discriminates by magnetic measurement, the tread rubber TR is pasted. It can be used as a raw tire later.

図４は、本発明に係るベルト構造の検査方法の原理を示す概念図であり、図４（ａ）に示すように、ヨーク４Ａと４Ｂとを結ぶ直線を含む平面（紙面）内にスチールコード２８が延在していれば、スチールコードが透磁率の高い強磁性体であることから、磁路１３の磁束密度は高くなり、一方、図４（ｂ）に示すように、ヨーク４Ａと４Ｂとを結ぶ直線を含む平面（紙面）内に対してスチールコード２８が大きな角度で交差していたり、スチールコード２８が存在していなかったりした場合には、磁束密度は低くなり、その結果、磁路１３中に配置された磁気センサ３で検出される磁束密度には、これらの場合に応じて大きさの違いが生じる。   FIG. 4 is a conceptual diagram showing the principle of the belt structure inspection method according to the present invention. As shown in FIG. 4 (a), a steel cord is provided in a plane (paper surface) including a straight line connecting the yokes 4A and 4B. If 28 is extended, the steel cord is a ferromagnetic material having a high magnetic permeability, so that the magnetic flux density of the magnetic path 13 becomes high. On the other hand, as shown in FIG. When the steel cord 28 intersects at a large angle with respect to the plane (paper surface) including the straight line connecting the two, or the steel cord 28 does not exist, the magnetic flux density becomes low. The magnetic flux density detected by the magnetic sensor 3 disposed in the path 13 varies in size depending on these cases.

本発明のベルト構造の検査方法は、この原理を利用して、形成途中の生タイヤ２０を所定軸線L上に配置したあと、前述のように配置された交番磁界発生手段２を用いて所定の強度の交番磁界を発生させ、磁路１３中に配置された磁気センサ３でこの磁路１３の交番磁束密度を測定し、この測定結果に基づいて、判別の対象となるベルトプライ（例えばベルトプライ２１Ａ）のスチールコードの配列方向を判別して、ベルト構造の良否を検査するものであり、例えば、磁束密度が所定の閾値より小さければ、仕様通りの方向にスチールコードが配列されていないとしてそのベルトプライが存在しないか、もしくは、貼られるべきベルトプライの種類が間違っていると判定し、一方、磁束密度が所定の閾値より大きい場合には、仕様通りのベルトプライが形成されていると判定することができ、このようにしてベルト構造の良否の判定を行うことができる。   The belt structure inspection method of the present invention uses this principle to place a raw tire 20 being formed on a predetermined axis L, and then uses the alternating magnetic field generating means 2 arranged as described above. A strong alternating magnetic field is generated, the alternating magnetic flux density of the magnetic path 13 is measured by the magnetic sensor 3 disposed in the magnetic path 13, and a belt ply (for example, belt ply) to be discriminated based on the measurement result. 21A) is for determining the arrangement direction of the steel cord and checking the quality of the belt structure. For example, if the magnetic flux density is smaller than a predetermined threshold value, the steel cord is not arranged in the specified direction. If it is determined that the belt ply does not exist or the type of belt ply to be applied is wrong, and the magnetic flux density is larger than the predetermined threshold, the belt as specified It can be determined that the ply has been formed, and in this manner, the quality of the belt structure can be determined.

図５は、このようにして測定された磁気センサ３から出力される波形の周波数スペクトルを示すグラフであり、図５（ａ）は、ベルトプライのスチールコードが、磁路１３を含む平面Ｆ内に延在する場合のスペクトルであり、図５（ｂ）は、ベルトプライのスチールコードが、平面Ｆと直交する方向に延在している場合のスペクトルであり、これらのグラフによると、３次高調波成分の磁束密度の強さは、図５（ａ）のグラフではA1と大きいのに対して、図５（ｂ）のグラフではA2と小さく、少なくとも３次高調波成分の磁束密度の強さは、スチールコードの方向判別に利用することができることがわかる。したがって、本発明における具体的なスチールコードの方向判別方法としては、交番磁束密度における３次成分の磁束密度が、所定の閾値以上であれば、ベルト構造は「合格」で、これがこの閾値未満であれば「不合格」であると判定するのが好ましい。 FIG. 5 is a graph showing the frequency spectrum of the waveform output from the magnetic sensor 3 measured in this way. FIG. 5A shows a plane F in which the steel cord of the belt ply includes the magnetic path 13. 5B is a spectrum when the steel cord of the belt ply extends in a direction orthogonal to the plane F. According to these graphs, the third order The strength of the magnetic flux density of the harmonic component is as large as A 1 in the graph of FIG. 5A, whereas it is small as A 2 in the graph of FIG. 5B, and the magnetic flux density of at least the third harmonic component. It can be seen that the strength of can be used to determine the direction of the steel cord. Therefore, as a specific method of discriminating the direction of the steel cord in the present invention, if the magnetic flux density of the tertiary component in the alternating magnetic flux density is equal to or higher than a predetermined threshold, the belt structure is “pass”, and this is less than this threshold. If it exists, it is preferable to determine that it is “failed”.

ここで、スチールコードが磁路１３を含む平面F内にある場合と、ない場合とで、特に、３次高調波成分の磁束密度の強さに大きな差が生じることが実験でわかっている。すなわち、強い交番磁界をスチールコードにかけることにより、スチールコード内は飽和磁束密度に達するが、このときの磁束線は透過磁束により重畳され、高調波成分がスチールコード方向の漏れ磁束として現れ、実験結果ではスチールコードの有無による、２〜５次の範囲、特に3次の高調波成分の磁束密度の差が他の次数に比較して大きいことがわかっている。   Here, it has been experimentally known that there is a great difference in the strength of the magnetic flux density of the third-order harmonic component between the case where the steel cord is in the plane F including the magnetic path 13 and the case where the steel cord is not present. That is, when a strong alternating magnetic field is applied to the steel cord, the saturation magnetic flux density is reached in the steel cord, but the magnetic flux lines at this time are superimposed by the transmitted magnetic flux, and the harmonic component appears as a leakage magnetic flux in the steel cord direction. The results show that the difference in the magnetic flux density of the 2nd to 5th order ranges, particularly the 3rd order harmonic components, depending on the presence or absence of the steel cord is larger than other orders.

なお、３次高調波成分の磁束密度の強さを比較するために、判別手段１１としては、磁気センサ３からの出力波形から３次高調波成分を取り出すフィルタリング機能を具えるよう構成するのが好ましい。   In order to compare the intensity of the magnetic flux density of the third harmonic component, the discriminating means 11 is configured to have a filtering function for extracting the third harmonic component from the output waveform from the magnetic sensor 3. preferable.

本発明に係る実施形態のスチールコード配列方向判別装置を示す概略図である。It is the schematic which shows the steel cord arrangement direction discriminating device of the embodiment concerning the present invention. 判別対象となる生タイヤの状態例を示す図である。It is a figure which shows the example of a state of the raw tire used as discrimination | determination object. 生タイヤを半径方向外側見た図である。It is the figure which looked at the raw tire on the radial direction outer side. 本発明に係るベルト構造の検査方法の原理を示す概念図である。It is a conceptual diagram which shows the principle of the inspection method of the belt structure which concerns on this invention. 磁気センサから出力される波形の周波数スペクトルを示すグラフである。It is a graph which shows the frequency spectrum of the waveform output from a magnetic sensor.

符号の説明Explanation of symbols

１ スチールコード配列方向判別装置
２、２Ａ 交番磁界発生手段
３ 磁気センサ
４Ａ、４Ｂ ヨーク
５ 磁界生成回路
６ ケース
７ 固定アーム
８ 第３層
８ａ 第３層のコード
９ 交差層
１１ 判別手段
１３ 磁路
２０ 生タイヤ
２１ ベルト
２１Ａ、２１Ｂ ベルトプライ
２４ カーカスバンド
２５ シェーピングドラム
２８ スチールコード
Ｅ タイヤ赤道面
Ｆ 磁路が形成される面
Ｌ 軸線
Ｐ 回動軸
ＴＲ トレッドゴム DESCRIPTION OF SYMBOLS 1 Steel cord arrangement | positioning direction discriminating device 2, 2A Alternating magnetic field generation means 3 Magnetic sensor 4A, 4B Yoke 5 Magnetic field generation circuit 6 Case 7 Fixed arm 8 3rd layer 8a 3rd layer code 9 Crossing layer 11 Discriminating means 13 Magnetic path 20 Raw tire 21 Belt 21A, 21B Belt ply 24 Carcass band 25 Shaping drum 28 Steel cord E Tire equatorial plane F Surface on which magnetic path is formed L Axis line P Rotating shaft TR Tread rubber

Claims (5)

平行に配列されたスチールコードよりなるベルトプライを１枚以上積層してなるベルトを有するタイヤの、前記スチールコードの配列方向を判別してベルト構造の良否を検査すする方法において、
形成途中の生タイヤを所定軸線上に配置した後、
この状態の生タイヤの仕様に合致する仮想生タイヤを前記所定軸線上に配置した場合に、前記判別の対象となるベルトプライが最外層に位置するタイヤ幅方向領域で、このベルトプライに含まれる１本のスチールコードが延在するであろう面内に磁路を形成するよう配置された交番磁界発生手段を用いて所定の強度の交番磁界を発生させ、
前記磁路中に配置された磁気センサでこの磁路の交番磁束密度を測定し、この測定結果に基づいて、前記判別の対象となるベルトプライのスチールコードの配列方向を判別するベルト構造の検査方法。 In a method for inspecting the quality of the belt structure by determining the arrangement direction of the steel cords of a tire having a belt formed by laminating one or more belt plies made of steel cords arranged in parallel,
After placing the raw tire in the process of formation on a predetermined axis,
When a virtual raw tire that matches the specifications of the raw tire in this state is arranged on the predetermined axis, the belt ply to be discriminated is included in this belt ply in a tire width direction region located in the outermost layer. An alternating magnetic field generating means arranged to form a magnetic path in a plane in which one steel cord will extend is generated with an alternating magnetic field of a predetermined strength;
Inspecting the belt structure by measuring the alternating magnetic flux density of the magnetic path with a magnetic sensor disposed in the magnetic path, and determining the arrangement direction of the steel cords of the belt ply to be determined based on the measurement result Method. 生タイヤを成型する工程において、所定軸線上に配置されたカーカスバンドをトロイダル状にシェーピングし、カーカスバンドにベルトプライを貼り付けたあと、前記判別を行う請求項１に記載のベルト構造の検査方法。   The method for inspecting a belt structure according to claim 1, wherein, in the step of molding the raw tire, the carcass band disposed on a predetermined axis is shaped in a toroidal shape, and a belt ply is attached to the carcass band, and then the determination is performed. . 前記配列方向が赤道面に対する相互に逆向きであり、内側の層の幅が外側の層の幅より広い２層のベルトプライよりなるベルトを有するタイヤに対して、前記仮想生タイヤにおけるそれぞれのベルトプライのスチールコードの延在方向に磁路を形成するよう配置された２台の交番磁界発生手段を用いて両方の層に対する前記判別を行う請求項１もしくは２に記載のベルト構造の検査方法。   With respect to a tire having a belt composed of two layers of belt plies in which the arrangement directions are opposite to each other with respect to the equator plane and the width of the inner layer is wider than the width of the outer layer, each belt in the virtual raw tire The belt structure inspection method according to claim 1 or 2, wherein the discrimination for both layers is performed using two alternating magnetic field generating means arranged so as to form a magnetic path in the extending direction of the steel cord of the ply. 前記測定された交番磁束密度の周波数スペクトルにおいて、３次成分のピーク磁束密度が所定の閾値よりも小さい場合に前記ベルト構造が不良であると判定する請求項１〜３のいずれかに記載のベルト構造の検査方法。   The belt according to any one of claims 1 to 3, wherein in the frequency spectrum of the measured alternating magnetic flux density, the belt structure is determined to be defective when a peak magnetic flux density of a tertiary component is smaller than a predetermined threshold value. Structure inspection method. 請求項１〜４のいずれかに記載されたベルト構造の検査方法に用いられるスチールコード配列方向判別装置であって、
前記交番磁界発生手段と、この交番磁界発生手段によって形成される磁路中に設けられ、この磁路の交番磁束密度を測定する磁気センサと、磁気センサからの交番出力波形を処理してベルトプライのスチールコードの配列方向を判別する判別手段とを具えるスチールコード配列方向判別装置。 A steel cord arrangement direction discriminating device used for the belt structure inspection method according to any one of claims 1 to 4,
The alternating magnetic field generating means, a magnetic sensor provided in the magnetic path formed by the alternating magnetic field generating means, and measuring the alternating magnetic flux density of the magnetic path, and processing the alternating output waveform from the magnetic sensor to process the belt ply Steel cord arrangement direction discriminating device comprising discriminating means for discriminating the arrangement direction of steel cords.
JP2006281208A 2006-10-16 2006-10-16 Steel cord array direction inspection method and apparatus used therefor Expired - Fee Related JP5039358B2 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50144457A (en) * 1974-05-09 1975-11-20
JPS5939538A (en) * 1982-08-31 1984-03-03 Yokohama Rubber Co Ltd:The Inspection device for arrangement of steel cord in tire
JPS627533A (en) * 1985-07-04 1987-01-14 Bridgestone Corp Detecting device for angle of inclination of steel wire in belt for tire
JPH01154735A (en) * 1987-12-11 1989-06-16 Sumitomo Rubber Ind Ltd Method and apparatus for inspecting internal of steel cord
JPH0458106A (en) * 1990-06-28 1992-02-25 Yokohama Rubber Co Ltd:The Method and device for detecting angle of steel cord
JPH079585A (en) * 1993-06-22 1995-01-13 Yokohama Rubber Co Ltd:The Detection of condition of splice part of metal cord-containing belt like member
JPH07323490A (en) * 1994-05-31 1995-12-12 Mitsubishi Heavy Ind Ltd Angle detector of belt cord
JP2002059489A (en) * 2000-08-17 2002-02-26 Sumitomo Rubber Ind Ltd Cord angle measuring apparatus
JP2005271542A (en) * 2004-03-26 2005-10-06 Yokohama Rubber Co Ltd:The Method of determining tip tilting angle of sheet-like member and its apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50144457A (en) * 1974-05-09 1975-11-20
JPS5939538A (en) * 1982-08-31 1984-03-03 Yokohama Rubber Co Ltd:The Inspection device for arrangement of steel cord in tire
JPS627533A (en) * 1985-07-04 1987-01-14 Bridgestone Corp Detecting device for angle of inclination of steel wire in belt for tire
JPH01154735A (en) * 1987-12-11 1989-06-16 Sumitomo Rubber Ind Ltd Method and apparatus for inspecting internal of steel cord
JPH0458106A (en) * 1990-06-28 1992-02-25 Yokohama Rubber Co Ltd:The Method and device for detecting angle of steel cord
JPH079585A (en) * 1993-06-22 1995-01-13 Yokohama Rubber Co Ltd:The Detection of condition of splice part of metal cord-containing belt like member
JPH07323490A (en) * 1994-05-31 1995-12-12 Mitsubishi Heavy Ind Ltd Angle detector of belt cord
JP2002059489A (en) * 2000-08-17 2002-02-26 Sumitomo Rubber Ind Ltd Cord angle measuring apparatus
JP2005271542A (en) * 2004-03-26 2005-10-06 Yokohama Rubber Co Ltd:The Method of determining tip tilting angle of sheet-like member and its apparatus

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