JP4411501B2

JP4411501B2 - Pneumatic tire provided with a transponder and manufacturing method thereof

Info

Publication number: JP4411501B2
Application number: JP2000331258A
Authority: JP
Inventors: 博功丸山; 一浩志村
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 2000-10-30
Filing date: 2000-10-30
Publication date: 2010-02-10
Anticipated expiration: 2020-10-30
Also published as: JP2002137609A

Description

【０００１】
【発明の属する技術分野】
本発明はトランスポンダを配置した空気入りタイヤとその製造方法に関し、更に詳しくは種々の情報を記憶するトランスポンダの情報を確実に読み取り及び書き込み可能にするとともに、車両走行時の耐久性に優れ、しかも通信特性に優れるトランスポンダを配置した空気入りタイヤと、その確実な製造方法に関する。
【０００２】
【従来の技術】
図２３記載模式図のように、受信機と送信機の機能及び記憶機能を併せ持つトランスポンダは、タイヤメーカーによるタイヤの製造管理やタイヤ購入者のタイヤ使用履歴管理、あるいはタイヤの内圧、温度などの情報を得ることを目的としてタイヤに設置する技術が盛んに開発されている。例えば、実開平２−１２３４０４号公報では、図２２に示す様にタイヤが、一方のビードの環状の張力部材の半径方向外側に位置する２つのエイペックスを有し、前記トランスポンダはこの２つのエイペックスの間に位置する構造が提案され、一定の効果を上げている。
【０００３】
しかし、タイヤ内部に取り付けたトランスポンダはタイヤ周上のどこにあるかタイヤの外側からは目視ではまったく分からず、特にタイヤ接地側にトランスポンダがくるように車両がとまってしまった時等は、質問機の電波がトランスポンダに届き難く再度車両を動かして測定し直す必要があった。
【０００４】
更に耐え難いことには、タイヤ内部の部材の合わせ目にガラス被覆したトランスポンダをタイヤ加硫前に組み込むため、タイヤ加硫時のゴム流れによってトランスポンダが移動してしまう恐れがあり、ゴム流れを極めて正確に制御する必要がある。しかも、車両の走行にあってはタイヤの変形や発熱が伴い、トランスポンダと周辺ゴムとの接着界面が破壊されやすく、常にトランスポンダの剥離や通信不能の危険が付きまとっていた。
【０００５】
【発明が解決しようとする課題】
種々の情報を記憶するトランスポンダの情報を確実に読み取り及び書き込み可能にするとともに、車両走行時の耐久性に優れるトランスポンダを配置した空気入りタイヤとその確実な製造方法を提供することにある。
【０００６】
【課題を解決するための手段】
本発明によれば樹脂で被覆された受信機と送信機の機能及び記憶機能を併せ持つトランスポンダの少なくとも一部分をタイヤ外表面から突出し、しかもリムフランジ高さからタイヤ半径方向外側に１００ｍｍ以内のタイヤビード部に、トランスポンダが配置された空気入りタイヤが提供される。
【０００７】
これにより、トランスポンダをタイヤ内部に埋め込んだ場合と異なりトランスポンダの位置が外観上不明になる心配が無い。又、トランスポンダを配置した位置をタイヤの外側から簡単に目視で特定できるため、所望の位置で車両を停止できる上に、繰り返し屈曲変形が加わるタイヤにあっても、比較的に変形の少ないビード部分にトランスポンダを配置してあるために良好な耐久性能が得られる。
【０００８】
また、本発明によれば前記トランスポンダが窪みを有し、しかも前記窪みがタイヤ外部に向けられた空気入りタイヤが提供されることにより、タイヤ外部から目視でトランスポンダの位置が確認できるため、質問機との距離を著しく短くして通信出来るため読み取りや書き込み不良の心配が無い。
【０００９】
また、本発明によれば前記トランスポンダが貫通穴を有し、しかも前記貫通穴の一端がタイヤ内部側に位置するとともに他端がタイヤの外表面側に位置するようにタイヤビード部に配置された空気入りタイヤが提供されることによって、質問機との距離を最短に出来るため読み取りや書き込み不良の心配が無いし、貫通穴部にサイドトレッドゴムが流入して、タイヤビード部に配置されているためトランスポンダの脱落の心配が減少する。
【００１０】
また、本発明によれば前記トランスポンダの貫通穴の他端が一端よりも大きいことによって、貫通穴部に流入したサイドトレッドゴムがタイヤ表面側で広がってタイヤに埋め込まれるためトランスポンダの脱落の心配が更に減少する。
【００１１】
また、本発明によれば前記トランスポンダの少なくともタイヤ外表面側の一部分がサイドトレッドゴムで覆われて把持されている空気入りタイヤが提供されることによって、タイヤと縁石等の干渉が有っても外力が直接トランスポンダへ加わる影響が少なくて済み、車両走行時のトランスポンダの耐久性に優れる。
【００１２】
また、本発明によれば窪みまたは貫通穴を有する樹脂で被覆されたトランスポンダの少なくとも一部分をタイヤ外表面から突出して埋め込むに際し、金型の表面に形成されている突起に前記トランスポンダの窪み又は貫通穴を嵌合させて前記トランスポンダを予め配置し、その後未加硫タイヤを金型に挿入して加硫する空気入りタイヤの製造方法が提供されることによって、加硫中のゴム流れが大きくても突起によってトランスポンダが把持されているため、トランスポンダを所望の場所に正確に配置できる。
【００１３】
また、本発明によれば前記窪み又は貫通穴と嵌合する、前記突起高さ以下の深さのサイドトレッドゴムの流入する凹部を有する突起のある金型で加硫する空気入りタイヤの製造方法が提供されることによって、トランスポンダの穴を通ってサイドトレッドゴムが突起の窪みに流入し、凹部で広がってトランスポンダを把持するため、トランスポンダの剥がれや脱落の心配が無い。
【００１４】
また、本発明によれば、前記貫通穴は前記金型側の開口が大きく形成され且つ貫通穴内部の周縁に段差を有し、前記トランスポンダの窪みの深さ又は前記貫通穴のタイヤ外表面側開口から前記段差までの深さより高い突起を設置した金型で加硫する空気入りタイヤの製造方法が提供されることによって、窪み又はタイヤ表面側貫通穴の深さを金型突起高さが上回る分だけ、タイヤサイドトレッドゴムがトランスポンダを抱え込んで加硫されるのである。即ち、前記窪み又はタイヤ表面側貫通穴部深さと金型の突起高さに差を設けることによって、トランスポンダの配置高さを自由に調節できる。
【００１５】
また、本発明によれば前記トランスポンダの窪み又は貫通穴より大きいストッパー部分を有する突起を設置した金型で、加硫する空気入りタイヤの製造方法が提供されることによって、タイヤの加硫中にトランスポンダが動くことを防止できるし、トランスポンダの配置高さを自由に調節できる。
【００１６】
また、本発明によれば前記トランスポンダの窪み又は貫通穴と嵌合する、複数の突起を有する金型で加硫する空気入りタイヤの製造方法が提供されることによって、タイヤサイドトレッドゴムが突起内側に流入し極めて強固にトランスポンダを把持できる。
【００１７】
【発明の実施の形態】
次に本発明について図を参照して説明するが、本発明の請求範囲をこれらの実施例に限定するものでないことはもちろんである。図１（ａ）は本発明の樹脂で被覆された窪みを有するトランスポンダを配置したタイヤの半断面説明図であって、図１（ｂ）は図１（ａ）のトランスポンダ配置部分の断面拡大図であって、１はキャップトレッド、２はベルト、３はサイドトレッド、４はカーカスコード、５はビードワイヤー、６はフィニッシング、７はトランスポンダ、８はビード部、１１はタイヤであって、樹脂で被覆されたトランスポンダの窪み７ａ部分がタイヤ表面に露出している状態を示している。
【００１８】
図１（ｂ）のトランスポンダ配置部分断面拡大図は窪みを有するトランスポンダ７が窪み７ａをタイヤ表面側に向けてタイヤ内部に埋め込まれた状態を示している。こうすることで、タイヤ内部にトランスポンダを完全に埋め込んだ場合と異なり、タイヤ表面にトランスポンダ７の窪み７ａが残り、トランスポンダ７を配置した位置をタイヤの外側から簡単に目視で特定できるため、所望の位置で車両を停止でき、図示しない質問機との距離を最短にして通信出来るため読み取りや書き込み不良の心配が無い。
【００１９】
また、窪み深さと金型の突起の差即ちトランスポンダを抱え込むサイドトレッドゴム被覆厚さＢは、０．５〜３ｍｍ好ましくは１〜２ｍｍがよい。０．５ｍｍ未満では保護効果が小さく、３ｍｍ超では加硫時のゴム流れに不良を生じ易く好ましくない。
【００２０】
なお、トランスポンダ７の形状は四角板状に限らず、六角板状、円盤状など適宜の形状で良く、金型の突起９とトランスポンダ７の窪み７ａや貫通穴７ｂの形状も互いに嵌合できれば適宜であって良い。また、本発明のトランスポンダ用樹脂は特にタイヤ加硫中の耐熱性を有していれば特に限定されないが、例えばエポキシ樹脂で２００℃以上の融点、あるいは熱分解温度を有する耐熱特性を有していればよい。なお、本発明でいう露出には前記窪みや貫通穴の表面に所謂オーバーフローと称される０．５ｍｍ以下のゴムシートが覆っている場合も含まれる。
【００２１】
図２（ａ）は本発明の樹脂で被覆された窪み７ａを有するトランスポンダ７を製造用金型の突起９に嵌め込んだ金型半断面説明図であって、図２（ｂ）は図２（ａ）のトランスポンダを嵌め込んだ部分の拡大図であって、拡大図はトランスポンダが前記窪み深さより高い金型の突起９に嵌合している状態を表している斜視図である。したがって、トランスポンダ７をサイドトレッドゴムが抱え込むように配置することが可能になり、良好な走行耐久性と、縁石など外部からの干渉を直接トランスポンダ７に与えないで済むために、破壊による故障発生を抑制することが出きる。
【００２２】
図３（ａ）は本発明のトランスポンダ嵌合用の金型の突起９を設けた金型半断面説明図であって、図３（ｂ）は突起９の金型に設ける突起の拡大図斜視図である。こうすることによって、タイヤ加硫中のゴム流れによってトランスポンダ７が動いてしまうことが無く良好な通信特性が期待できる。
【００２３】
図４は本発明の樹脂で被覆された窪みを有するトランスポンダ７のタイヤ内面側と表面側の斜視説明図であって前記窪み７ａをタイヤビード部表面側に向けタイヤビード部に配置して構成する。こうすることで、トランスポンダ７をサイドトレッドゴムが廻りから抱え込むように配置することが可能になるので、良好な走行耐久性と、縁石など外部からの干渉を直接トランスポンダ７に与えないで済むために破壊による故障発生を抑制することが出来る。なお、トランスポンダ７の窪み７ａの形状は四角形に限らず、六角形、円形など適宜の形状で良く、金型の突起９とトランスポンダ７の窪み７ａや貫通穴７ｂの形状も互いに嵌合できれば適宜であって良い。
【００２４】
図５は本発明の樹脂で被覆されたトランスポンダ７の配置場所を表すタイヤビード部拡大斜視説明図であって、トランスポンダ７の周囲をサイドトレッドゴムが被覆し、外力の干渉を和らげているとともに、強固にトランスポンダを把持している事を示している。
【００２５】
図６は本発明の樹脂で被覆されたトランスポンダ７の配置場所を表すタイヤ１１の斜視説明図であって、タイヤビード部にトランスポンダ７を配置することで目視によってトランスポンダ７の配置場所が分かるので、当該位置に質問機を当てることによって確実な読み取りおよび書き込みが可能になる。
【００２６】
図７は本発明の樹脂で被覆されたトランスポンダとリムの位置関係のタイヤ断面説明図であって、リムフランジ高さＨからトランスポンダの中心までの高さをＡとして、Ａが１００ｍｍ以下好ましくは７０ｍｍ以下であることが良好な耐久性を享受できるのである。１００ｍｍを超えるとタイヤサイド部分に近くなり、車両の荷重負荷走行時の歪みが大きくなりトランスポンダの剥がれや脱落の恐れが大きくなり好ましくない。また、トランスポンダ７の外周が車両の荷重負荷時にリムに接触しないために、少なくとも１０ｍｍ以上好ましくは２０ｍｍ以上リムフランジ高さＨから離すことが望ましい。
【００２７】
図８は本発明の樹脂で被覆された貫通穴７ｂを有するトランスポンダ７をタイヤビード部８に配置したタイヤ部分断面説明図である。こうすることで、タイヤ内部に埋め込んだ場合と異なりトランスポンダ７の位置不明の心配が無いし、トランスポンダ７を配置した位置をタイヤの外側から簡単に目視で特定できるため、所望の位置で車両を停止できる利点がある。
【００２８】
図９は本発明の樹脂で被覆された貫通穴７ｂを有するトランスポンダ７を金型の突起９に嵌め込んだ部分斜視説明図である。トランスポンダ７がタイヤビード部表面側の貫通穴７ｂより大きいストッパー部９ａのある金型の突起に嵌合しているので、タイヤ加硫中のゴム流れによってトランスポンダ７が動いてしまうことが無く良好な配置位置確保できる。
【００２９】
図１０はトランスポンダ７と嵌合する中央突起部を有するとともに、貫通穴７ｂより大きいストッパー部９ａを有する金型の突起９の部分斜視説明図であって、トランスポンダ７の周辺をストッパー部９ａの厚さだけタイヤサイドトレッドゴムが覆うため良好な耐久性が維持できる。
【００３０】
図１１は本発明の樹脂で被覆された貫通穴７ｂを有するトランスポンダ７のタイヤ内面側と表面側の説明図である。こうすることで、トランスポンダ７の貫通穴７ｂにサイドトレッドゴムが流入し内側からも押さえ込むように配置することが可能になる。
【００３１】
図１２は本発明の樹脂で被覆されたトランスポンダ７の配置場所を表すタイヤビード部拡大斜視説明図であって、トランスポンダ７の周囲と貫通穴を通じて流入したサイドトレッドゴム３ａが周辺部を被覆し、外力の干渉を和らげている。
【００３２】
図１３は本発明の樹脂で被覆されたタイヤ表面側の貫通穴７ｃとタイヤ内面側の貫通穴７ｄを有するトランスポンダ７をタイヤに配置した他のタイヤ部分断面説明図であって、タイヤ内面側の貫通穴７ｄよりタイヤ表面側の貫通穴７ｃが大きく、かつ金型突起９の高さとタイヤ表面側の貫通穴７ｃの深さとの差だけ、タイヤ表面部から高く配置された状態を示している。こうすることで、タイヤ内部に埋め込んだ場合と異なりトランスポンダ７の位置不明の心配が無いし、トランスポンダ７を配置した位置をタイヤの外側から簡単に目視で特定できるため、トランスポンダ７が通信のし易い所望の位置になるように車両を停止できる利点がある。
【００３３】
なお、タイヤ表面側の貫通穴深さ７ｃと金型の突起９の高さの差即ちトランスポンダ７を抱え込むサイドトレッドゴム被覆厚さＢは、０．５〜３ｍｍ好ましくは１〜２ｍｍがよい。０．５ｍｍ未満では保護効果が小さく、３ｍｍ超では加硫時のゴム流れに不良を生じ易く好ましくない。
【００３４】
図１４は本発明の樹脂で被覆されたタイヤ表面側の貫通穴７ｃとタイヤ内面側の貫通穴７ｄを有するトランスポンダ７を金型の突起９に嵌め込んだ部分斜視説明図である。トランスポンダ７がタイヤ表面側の貫通穴７ｃ深さより高い金型の突起９に嵌合しているのでタイヤ加硫中のゴム流れによってトランスポンダが動いてしまうことが無い上に、トランスポンダ７の周辺をタイヤサイドトレッドゴムが覆うため良好な耐久性が維持できる。しかも金型突起中央部に貫通穴７ｃを設けてあるので、トランスポンダの内側にもサイドトレッドゴムが流入し、更にトランスポンダをタイヤサイドトレッドゴムが把持する力が強固になる。
【００３５】
図１５はトランスポンダ嵌合用の金型の突起９に凹部９ｂを設けた部分斜視説明図であって、トランスポンダ７の貫通穴７ｄを通ってサイドトレッドゴムが金型の突起９の凹部９ｂに広がって充填されるため、あたかもボタン掛けの様にトランスポンダ７を強固に把持するためより良好な耐久性能が維持できる。
【００３６】
図１６は本発明の樹脂で被覆されたタイヤ表面側の貫通穴７ｃがタイヤ内面側の貫通穴７ｄより大きいトランスポンダのタイヤ内面側と表面側の斜視説明図である。こうすることで、トランスポンダ７のタイヤ表面側貫通穴７ｃにサイドトレッドゴムが流入し広がるため、ボタン掛けの様にトランスポンダ７を強固に把持するためより良好な耐久性能が維持できる。
【００３７】
図１７は本発明の樹脂で被覆されたトランスポンダ７の配置場所を表すタイヤビード部拡大斜視説明図であって、トランスポンダ７の周囲と貫通穴を通じて流入したサイドトレッドゴム３ａが中央部を被覆し、外力の干渉を和らげている。
【００３８】
図１８は本発明の樹脂で被覆されたタイヤ表面側の貫通穴７ｃとタイヤ内面側の貫通穴７ｄを有するトランスポンダをタイヤに配置した、他のタイヤ部分２種類の部分断面説明図である。こうすることで、部分的にトランスポンダをサイドゴムで拘束して配置したことになり極めて強固に把持可能になるし、トランスポンダを配置した位置をタイヤの外側から簡単に目視で特定できるため、所望の位置で車両を停止できる利点がある。
【００３９】
図１９は本発明の樹脂で被覆されたタイヤ表面側の貫通穴７ｃとタイヤ内面側の貫通穴７ｄを有するトランスポンダ７を金型の突起９に嵌め込んだ部分斜視説明図である。トランスポンダ７がタイヤ表面側の貫通穴７ｃ深さより高い金型の複数の突起９ｃに嵌合しているのでタイヤ加硫中のゴム流れによってトランスポンダ７が動いてしまうことが無い上に、トランスポンダ７の周辺と上からタイヤサイドトレッドゴムが覆うため良好な耐久性が維持できる。しかも金型突起が複数設けてあり中央部が空間なためタイヤサイドトレッドゴムが流入し、更にトランスポンダ７をタイヤサイドトレッドゴムが把持する力が強固になる。
【００４０】
図２０はトランスポンダ７の嵌合用に四隅に複数の突起９ｃを設けた部分斜視説明図であって、タイヤサイドトレッドゴムがトランスポンダ７を四方から強固に把持するためより良好な耐久性能が維持できる。なお、複数の突起９ｃの配置はトランスポンダ７と嵌合出来れば、個数、形状など自由なこともちろんである。当該トランスポンダは図１４と同じ形状である。こうすることで、トランスポンダ７のタイヤ表面側貫通穴７ｃにサイドトレッドゴムが流入し、ボタン掛けの様にトランスポンダ７を強固に把持するためより良好な耐久性能が維持できる。
【００４１】
【実施例】
図１〜図５記載の縦横２３ｍｍ、厚さ３ｍｍで中央に深さ１．５ｍｍ、直径５ｍｍの窪みを設けた、ＪＩＳＫ６２５３規格に則して測定したショアーＤ硬度９６で分解開始温度３００℃、のビスフェノールＡ型エポキシ樹脂で被覆した四角形のトランスポンダを使用した。前記トランスポンダを、一般舗装路走行用パターンの１１Ｒ２２．５１６ＰＲのリムフランジから４０ｍｍのところに相当する金型の位置に高さ３ｍｍ、直径５ｍｍの突起９を設け、本発明の実施例（１）として、図１（ａ）と図１（ｂ）の様にタイヤに配置した。次に、比較例（２）として（１）と同じトランスポンダを裏返しして突起を使わずに金型表面の同じ高さ位置に配置した場合、および比較例（３）として（１）と同じトランスポンダをリムフランジから１１０ｍｍのところに相当する金型の位置に高さ３ｍｍ、直径５ｍｍの金型の突起９を設け、配置した場合の３種類のタイヤを試作した。また、従来例（４）として図２３の従来のトランスポンダを図２２の様に埋め込んだタイヤを製作し、室内ドラム耐久性試験を各々のタイヤに実施した。
【００４２】
試験条件はＪＡＴＭＡ２０００年版を参照し、標準リム２２．５×８．２５、荷重２６．７２ｋＮ、空気圧７００ｋＰａ、速度６０ｋｍ／ｈｒで、（４）従来例のトランスポンダが通信不能になるまでの走行時間を１００とする指数で表示した。
【００４３】
【表１】

【００４４】
走行結果は表１の通りであり、本発明のトランスポンダ（１）の耐久性能が明らかに優れることが理解される。更に、タイヤ表面には高さ１．５mmで直径３０mmの突出部分が存在し、質問機を直接そこに当てることでトランスポンダとの距離を最小限度にすることができ、従来例のようにタイヤ周上を探し回る必要が無いことは容易に理解される。
【００４５】
【発明の効果】
本発明によれば、種々の情報を記憶するトランスポンダの情報を確実に読み取り及び書き込み可能にするとともに、車両走行時の耐久性に優れしかも通信特性に優れるトランスポンダを配置した空気入りタイヤとその製造方法を提供することができる。
【図面の簡単な説明】
【図１】（ａ）本発明の実施例タイヤ半断面図および（ｂ）トランスポンダ部分Ｘの断面拡大図
【図２】（ａ）本発明の実施例製造用金型の突起にトランスポンダをはめ込んだ半断面図および（ｂ）はめ込み部Ｙの部分斜視拡大図
【図３】（ａ）本発明実施例製造用金型の半断面図および（ｂ）突起部分Ｚの拡大斜視図
【図４】本発明実施例のトランスポンダのタイヤ内面側と表面側の斜視図
【図５】本発明実施例のトランスポンダの配置場所を表すタイヤビード部拡大斜視説明図
【図６】本発明実施例のトランスポンダの配置場所を表すタイヤ斜視説明図
【図７】本発明実施例のトランスポンダの配置場所を表すタイヤとリムのフランジ部分半断面図
【図８】本発明他の実施例トランスポンダ部分の断面図
【図９】本発明他の実施例製造用金型の突起にトランスポンダをはめ込んだ部分の斜視図
【図１０】本発明他の実施例製造用金型の突起部分の斜視図
【図１１】本発明他の実施例のトランスポンダのタイヤ内面側と表面側の斜視図
【図１２】本発明他の実施例トランスポンダの配置場所を表すタイヤビード部拡大斜視説明図
【図１３】本発明他の実施例トランスポンダ部分の断面図
【図１４】本発明他の実施例製造用金型の突起にトランスポンダをはめ込んだ部分の斜視図
【図１５】本発明他の実施例製造用金型の突起部分の斜視図
【図１６】本発明他の実施例トランスポンダのタイヤ内面側と表面側の斜視図
【図１７】本発明他の実施例トランスポンダの配置場所を表すタイヤビード部拡大斜視説明図
【図１８】本発明他の実施例トランスポンダ部分の２種類の断面図
【図１９】本発明他の実施例製造用金型の突起にトランスポンダをはめ込んだ部分の斜視図
【図２０】本発明他の実施例製造用金型の突起部分の斜視図
【図２１】本発明他の実施例トランスポンダの配置場所を表すタイヤビード部拡大斜視説明図
【図２２】従来のタイヤにおけるトランスポンダの配置図
【図２３】従来のトランスポンダの模式図
【符号の説明】
１キャップトレッド
２ベルト
３サイドトレッド
３ａ流入したサイドトレッドゴム
４カーカスコード
５ビードワイヤー
６フィニッシング
７トランスポンダ
７ａ窪み
７ｂ貫通穴
７ｃタイヤビード部表面側貫通穴
７ｄタイヤビード部内面側貫通穴
８ビード部
９金型の突起
９ａストッパー部
９ｂ凹部
９ｃ複数の突起
１０従来のトランスポンダ
１１タイヤ
Ａリムフランジ高さからトランスポンダの中心までの高さ
Ｈリムフランジ高さ
Ｂ被覆厚さ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pneumatic tire in which a transponder is arranged and a method for manufacturing the same, and more particularly, to make it possible to reliably read and write information on a transponder that stores various information, and to have excellent durability during vehicle travel and communication. The present invention relates to a pneumatic tire in which a transponder having excellent characteristics is disposed, and a reliable manufacturing method thereof.
[0002]
[Prior art]
As shown in the schematic diagram of FIG. 23, the transponder having both the function of the receiver and the transmitter and the memory function is information on tire manufacturing management by the tire manufacturer, tire purchase history management of the tire purchaser, tire internal pressure, temperature, etc. Technology for installing tires has been actively developed for the purpose of achieving the above. For example, in Japanese Utility Model Laid-Open No. 2-123404, as shown in FIG. 22, a tire has two apexes positioned radially outward of an annular tension member of one bead, and the transponder includes the two apecs. A structure located between the two has been proposed and has achieved a certain effect.
[0003]
However, the transponder installed inside the tire is not visible from the outside of the tire at all on the circumference of the tire, especially when the vehicle stops so that the transponder comes to the tire grounding side. It was difficult for radio waves to reach the transponder, and it was necessary to move the vehicle and measure again.
[0004]
What is more difficult to withstand is that the glass-coated transponder is assembled before tire vulcanization at the joints of the tire's internal components, which may cause the transponder to move due to the rubber flow during tire vulcanization. Need to control. Moreover, when the vehicle is running, the tire is deformed and heat is generated, and the adhesive interface between the transponder and the surrounding rubber is easily broken, and there is always a risk of peeling of the transponder and inability to communicate.
[0005]
[Problems to be solved by the invention]
It is an object of the present invention to provide a pneumatic tire in which a transponder having excellent durability during traveling of a vehicle and a reliable manufacturing method thereof are provided while making it possible to reliably read and write information on a transponder that stores various information.
[0006]
[Means for Solving the Problems]
According to the present invention, at least a part of a transponder having both the function of a receiver and a transmitter coated with a resin and the function of a memory and a memory function protrudes from the outer surface of the tire, and the tire bead portion is within 100 mm from the rim flange height outward in the tire radial direction. In addition, a pneumatic tire in which a transponder is disposed is provided.
[0007]
Thereby, unlike the case where the transponder is embedded in the tire, there is no fear that the position of the transponder becomes unclear in appearance. In addition, since the position where the transponder is arranged can be easily identified visually from the outside of the tire, the vehicle can be stopped at a desired position, and the bead portion with relatively little deformation even in a tire that is repeatedly bent and deformed. Since the transponder is arranged in the case, good durability performance can be obtained.
[0008]
Further, according to the present invention, since the transponder has a depression, and the pneumatic tire in which the depression is directed to the outside of the tire is provided, the position of the transponder can be visually confirmed from the outside of the tire. Because it can communicate with a significantly shorter distance, there is no worry of reading or writing defects.
[0009]
Further, according to the present invention, the transponder has a through hole, and is disposed in the tire bead portion so that one end of the through hole is located on the tire inner side and the other end is located on the outer surface side of the tire . By providing a pneumatic tire, the distance to the interrogator can be minimized, so there is no fear of reading or writing defects, and side tread rubber flows into the through hole and is placed in the tire bead As a result, the worry of the transponder falling off is reduced.
[0010]
In addition, according to the present invention, since the other end of the through hole of the transponder is larger than the one end , the side tread rubber flowing into the through hole portion spreads on the tire surface side and is embedded in the tire, so there is a risk of the transponder falling off. Further decrease.
[0011]
Moreover, by at least a portion of the outer surface of the tire side of the transponder according to the present invention is a pneumatic tire which is gripped covered with side tread rubber is provided, even if there is interference, such as tires and curb The effect of external force directly applied to the transponder is small, and the durability of the transponder when the vehicle is running is excellent.
[0012]
Further, according to the present invention, when at least a part of a transponder coated with a resin having a depression or a through hole protrudes from the outer surface of the tire and is embedded , the depression or the through hole of the transponder is formed in a protrusion formed on the surface of the mold. By providing a method for manufacturing a pneumatic tire in which the transponder is pre-arranged and then inserted into a mold and then vulcanized, the rubber flow during vulcanization is large. Since the transponder is gripped by the protrusion, the transponder can be accurately placed at a desired location.
[0013]
Further, according to the present invention, a method for manufacturing a pneumatic tire that is vulcanized with a mold having a protrusion having a recess into which a side tread rubber having a depth equal to or less than the height of the protrusion fits into the recess or the through-hole. Since the side tread rubber flows into the depressions of the protrusions through the holes of the transponder and spreads in the recesses to grip the transponder, there is no fear of the transponder coming off or dropping off.
[0014]
Further, according to the present invention, the through hole is formed with a large opening on the mold side and has a step at the periphery inside the through hole, and the depth of the recess of the transponder or the tire outer surface side of the through hole By providing a method of manufacturing a pneumatic tire that vulcanizes with a mold having protrusions higher than the depth from the opening to the step, the height of the mold protrusion exceeds the depth of the recess or the tire surface side through hole. The tire side tread rubber is vulcanized by holding the transponder as much. That is, the height of the transponder can be freely adjusted by providing a difference between the depth of the recess or the tire surface side through hole and the protrusion height of the mold.
[0015]
Further, according to the present invention, a method for manufacturing a pneumatic tire to be vulcanized with a mold having a protrusion having a stopper portion larger than a depression or a through hole of the transponder is provided, so that the tire is vulcanized. The transponder can be prevented from moving, and the arrangement height of the transponder can be freely adjusted.
[0016]
According to the present invention, there is also provided a method for manufacturing a pneumatic tire vulcanized with a mold having a plurality of protrusions that fits into a recess or a through-hole of the transponder, so that the tire side tread rubber is disposed inside the protrusions. The transponder can be gripped extremely firmly.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described with reference to the drawings. However, it is a matter of course that the scope of the present invention is not limited to these examples. FIG. 1A is a half cross-sectional explanatory view of a tire in which a transponder having a recess coated with the resin of the present invention is arranged, and FIG. 1B is an enlarged cross-sectional view of a transponder arrangement portion of FIG. 1 is a cap tread, 2 is a belt, 3 is a side tread, 4 is a carcass cord, 5 is a bead wire, 6 is finishing, 7 is a transponder, 8 is a bead portion, 11 is a tire, and is made of resin. The state where the hollow 7a portion of the coated transponder is exposed on the tire surface is shown.
[0018]
The transponder arrangement partial cross-sectional enlarged view of FIG. 1B shows a state in which a transponder 7 having a depression is embedded in the tire with the depression 7a facing the tire surface. In this way, unlike the case where the transponder is completely embedded in the tire, the depression 7a of the transponder 7 remains on the tire surface, and the position where the transponder 7 is arranged can be easily visually identified from the outside of the tire. The vehicle can be stopped at the position, and communication with the shortest distance to the interrogator (not shown) is possible, so there is no worry about reading or writing defects.
[0019]
Further, the difference between the depression depth and the protrusion of the mold, that is, the side tread rubber coating thickness B for holding the transponder is 0.5 to 3 mm, preferably 1 to 2 mm. If the thickness is less than 0.5 mm, the protective effect is small, and if it exceeds 3 mm, the rubber flow at the time of vulcanization tends to be poor, which is not preferable.
[0020]
The shape of the transponder 7 is not limited to a square plate shape, but may be an appropriate shape such as a hexagonal plate shape or a disk shape. If the shape of the projection 9 of the mold and the recess 7a or the through hole 7b of the transponder 7 can be fitted to each other, It may be. Further, the transponder resin of the present invention is not particularly limited as long as it has heat resistance particularly during tire vulcanization, but for example, an epoxy resin has a heat resistance characteristic having a melting point of 200 ° C. or higher or a thermal decomposition temperature. Just do it. The exposure referred to in the present invention includes the case where the surface of the recess or the through hole is covered with a rubber sheet of 0.5 mm or less called so-called overflow.
[0021]
FIG. 2 (a) is a half-sectional explanatory view of a mold in which a transponder 7 having a recess 7a coated with the resin of the present invention is fitted into a protrusion 9 of a manufacturing mold, and FIG. It is an enlarged view of the part which fitted the transponder of (a), Comprising: The enlarged view is a perspective view showing the state which has fitted the protrusion 9 of the metal mold | die higher than the said hollow depth. Therefore, it becomes possible to arrange the transponder 7 so that the side tread rubber is held, and it is not necessary to directly give the transponder 7 interference such as curb stones and external interference. It can be suppressed.
[0022]
FIG. 3 (a) is a half-sectional explanatory view of a mold provided with a mold projection 9 for fitting the transponder of the present invention, and FIG. 3 (b) is an enlarged perspective view of the projection provided on the mold of the projection 9. It is. By doing so, the transponder 7 does not move due to the rubber flow during tire vulcanization, and good communication characteristics can be expected.
[0023]
FIG. 4 is a perspective explanatory view of the tire inner surface side and the surface side of the transponder 7 having a recess coated with the resin of the present invention, and is configured by arranging the recess 7a on the tire bead portion facing the tire bead surface side. . By doing so, it becomes possible to arrange the transponder 7 so that the side tread rubber is carried around, so that it is not necessary to directly give the transponder 7 interference and external interference such as curbstone. The occurrence of failure due to destruction can be suppressed. The shape of the recess 7a of the transponder 7 is not limited to a quadrangle, and may be an appropriate shape such as a hexagon or a circle. The shape of the projection 9 of the mold and the recess 7a or the through hole 7b of the transponder 7 is also appropriate. It's okay.
[0024]
FIG. 5 is an enlarged perspective view of the tire bead portion showing the location of the transponder 7 coated with the resin of the present invention , and the periphery of the transponder 7 is covered with a side tread rubber to mitigate the interference of external force, It shows that the transponder is firmly held.
[0025]
FIG. 6 is a perspective explanatory view of the tire 11 showing the placement location of the transponder 7 coated with the resin of the present invention. By placing the transponder 7 in the tire bead portion, the placement location of the transponder 7 can be seen visually. By reading the interrogator at the position, reliable reading and writing are possible.
[0026]
FIG. 7 is a tire cross-sectional explanatory view of the positional relationship between the transponder and rim coated with the resin of the present invention, where A is the height from the rim flange height H to the center of the transponder, and A is 100 mm or less, preferably 70 mm. It can enjoy favorable durability that it is the following. If it exceeds 100 mm, it becomes close to the tire side portion, and the distortion during running under load of the vehicle increases, and the risk of peeling or dropping off of the transponder increases. Further, in order to prevent the outer periphery of the transponder 7 from coming into contact with the rim when the vehicle is loaded, it is desirable that the transponder 7 be separated from the rim flange height H by at least 10 mm, preferably 20 mm.
[0027]
FIG. 8 is a tire partial cross-sectional explanatory view in which the transponder 7 having the through hole 7b covered with the resin of the present invention is arranged in the tire bead portion 8. FIG. In this way, unlike the case where it is embedded inside the tire, there is no concern about the position of the transponder 7 being unknown, and the position where the transponder 7 is arranged can be easily identified visually from the outside of the tire, so the vehicle is stopped at the desired position. There are advantages you can do.
[0028]
FIG. 9 is a partial perspective explanatory view in which the transponder 7 having the through hole 7b covered with the resin of the present invention is fitted into the protrusion 9 of the mold. Since the transponder 7 is fitted to the protrusion of the mold having the stopper portion 9a larger than the through hole 7b on the tire bead surface side, the transponder 7 does not move due to the rubber flow during tire vulcanization. Arrangement position can be secured.
[0029]
FIG. 10 is a partial perspective explanatory view of a protrusion 9 of a mold having a central protrusion that fits with the transponder 7 and having a stopper portion 9a larger than the through-hole 7b. The periphery of the transponder 7 is the thickness of the stopper portion 9a. Since the tire side tread rubber covers it, good durability can be maintained.
[0030]
FIG. 11 is an explanatory view of the tire inner surface side and the surface side of the transponder 7 having the through hole 7b covered with the resin of the present invention. By doing so, the side tread rubber flows into the through hole 7b of the transponder 7 and can be arranged so as to be pressed down from the inside.
[0031]
FIG. 12 is an enlarged perspective view of the tire bead portion showing the location of the transponder 7 coated with the resin of the present invention , and the side tread rubber 3a that has flowed in through the through hole and the periphery of the transponder 7 covers the peripheral portion. Reducing external force interference.
[0032]
FIG. 13 is another cross-sectional explanatory view of a tire in which a transponder 7 having a through hole 7c on the tire surface side and a through hole 7d on the tire inner surface side coated with the resin of the present invention is disposed on the tire. The through-hole 7c on the tire surface side is larger than the through-hole 7d, and a state in which the through-hole 7c is disposed higher from the tire surface by the difference between the height of the mold protrusion 9 and the depth of the through-hole 7c on the tire surface side is shown. By doing so, unlike the case where it is embedded in the tire, there is no concern about the position of the transponder 7 being unclear, and the position where the transponder 7 is arranged can be easily visually identified from the outside of the tire, so that the transponder 7 can communicate easily. There is an advantage that the vehicle can be stopped to a desired position.
[0033]
The difference between the depth of the through hole 7c on the tire surface side and the height of the protrusion 9 of the mold, that is, the side tread rubber coating thickness B that holds the transponder 7 is 0.5 to 3 mm, preferably 1 to 2 mm. If the thickness is less than 0.5 mm, the protective effect is small, and if it exceeds 3 mm, the rubber flow at the time of vulcanization tends to be poor, which is not preferable.
[0034]
FIG. 14 is a partial perspective explanatory view in which a transponder 7 having a through hole 7c on the tire surface side and a through hole 7d on the tire inner surface side that is coated with the resin of the present invention is fitted in the protrusion 9 of the mold. Since the transponder 7 is fitted in the protrusion 9 of the mold higher than the depth of the through hole 7c on the tire surface side, the transponder is not moved by the rubber flow during the tire vulcanization, and the periphery of the transponder 7 is arranged around the tire. Since the side tread rubber covers, good durability can be maintained. Moreover, since the through hole 7c is provided in the center of the mold protrusion, the side tread rubber also flows into the inside of the transponder, and the force with which the tire side tread rubber grips the transponder is strengthened.
[0035]
FIG. 15 is a partial perspective explanatory view in which a recess 9 b is provided in the projection 9 of the mold for fitting the transponder, and the side tread rubber spreads into the recess 9 b of the projection 9 of the mold through the through hole 7 d of the transponder 7. Since it is filled, the transponder 7 is firmly held as if it is a button hook, so that better durability can be maintained.
[0036]
FIG. 16 is a perspective explanatory view of the tire inner surface side and the surface side of the transponder in which the through hole 7c on the tire surface side coated with the resin of the present invention is larger than the through hole 7d on the tire inner surface side. By doing so, since the side tread rubber flows into the tire surface side through hole 7c of the transponder 7 and spreads, the transponder 7 is firmly gripped like a button hook, so that better durability performance can be maintained.
[0037]
FIG. 17 is an enlarged perspective view of the tire bead portion showing the location of the transponder 7 coated with the resin of the present invention , and the side tread rubber 3a that has flowed in through the through hole and the periphery of the transponder 7 covers the center portion, Reducing external force interference.
[0038]
FIG. 18 is a partial cross-sectional explanatory view of two other tire portions in which a transponder having a through hole 7c on the tire surface side and a through hole 7d on the tire inner surface side coated with the resin of the present invention is arranged in the tire. In this way, the transponder is partially constrained by the side rubber and can be gripped very firmly, and the position where the transponder is placed can be easily identified visually from the outside of the tire. There is an advantage that the vehicle can be stopped.
[0039]
FIG. 19 is a partial perspective explanatory view in which a transponder 7 having a through hole 7c on the tire surface side and a through hole 7d on the inner surface side of the tire covered with the resin of the present invention is fitted in the protrusion 9 of the mold. Since the transponder 7 is fitted in the plurality of protrusions 9c of the mold higher than the depth of the through hole 7c on the tire surface side, the transponder 7 is not moved by the rubber flow during tire vulcanization. Good durability can be maintained because the tire side tread rubber covers from the periphery and top. Moreover, since a plurality of mold protrusions are provided and the central portion is space, the tire side tread rubber flows in, and the force with which the tire side tread rubber grips the transponder 7 is strengthened.
[0040]
FIG. 20 is a partial perspective explanatory view in which a plurality of protrusions 9c are provided at four corners for fitting the transponder 7, and the tire side tread rubber firmly holds the transponder 7 from the four sides, so that better durability performance can be maintained. Of course, the number and shape of the projections 9c are not limited as long as they can be fitted to the transponder 7. The transponder has the same shape as in FIG. By doing so, the side tread rubber flows into the tire surface side through hole 7c of the transponder 7, and the transponder 7 is firmly held like a button hook, so that better durability performance can be maintained.
[0041]
【Example】
Decomposition start temperature of 300 ° C. with Shore D hardness of 96 measured according to JIS K6253 standard, 23 mm in length and width described in FIGS. A square transponder covered with a bisphenol A type epoxy resin was used. The transponder is provided with a projection 9 having a height of 3 mm and a diameter of 5 mm at the position of a die corresponding to 40 mm from the rim flange of the 11R22.5 16PR of the general pavement running pattern. Embodiment (1) of the present invention As shown in FIG. 1 (a) and FIG. Next, as a comparative example (2), the same transponder as in (1) is turned over and placed at the same height position on the mold surface without using a protrusion, and as a comparative example (3), the same transponder as in (1) Three types of tires were manufactured as prototypes in which a mold projection 9 having a height of 3 mm and a diameter of 5 mm was provided at a position corresponding to 110 mm from the rim flange. Further, as a conventional example (4), a tire in which the conventional transponder of FIG. 23 was embedded as shown in FIG. 22 was manufactured, and an indoor drum durability test was performed on each tire.
[0042]
Test conditions refer to the 2000 version of JATMA, standard rim 22.5 × 8.25, load 26.72kN, air pressure 700kPa, speed 60km / hr, (4) traveling time until the transponder of the conventional example becomes unable to communicate Expressed with an index of 100.
[0043]
[Table 1]

[0044]
The traveling results are as shown in Table 1, and it is understood that the durability of the transponder (1) of the present invention is clearly superior. Furthermore, the tire surface has a protruding part with a height of 1.5 mm and a diameter of 30 mm, and the distance from the transponder can be minimized by hitting the interrogator directly on the tire surface. It's easy to understand that you don't have to search around.
[0045]
【The invention's effect】
Advantageous Effects of Invention According to the present invention, a pneumatic tire in which a transponder that can reliably read and write information on a transponder that stores various types of information, has excellent durability during vehicle travel, and has excellent communication characteristics, and a method for manufacturing the same are disclosed. Can be provided.
[Brief description of the drawings]
1A is a half sectional view of a tire according to an embodiment of the present invention, and FIG. 2B is an enlarged cross-sectional view of a transponder portion X. FIG. Half sectional view and (b) Partial perspective enlarged view of the fitting portion Y [FIG. 3] (a) Half sectional view of the mold for manufacturing the embodiment of the present invention and (b) Enlarged perspective view of the protruding portion Z [FIG. FIG. 5 is an enlarged perspective view of the tire bead portion showing the location of the transponder of the embodiment of the present invention. FIG. 6 is the location of the transponder of the embodiment of the present invention. FIG. 7 is a half sectional view of the flange portion of the tire and the rim showing the location of the transponder of the embodiment of the present invention. FIG. 8 is a sectional view of the transponder portion of another embodiment of the present invention. Invention other example made FIG. 10 is a perspective view of a projection portion of a mold for manufacturing another embodiment of the present invention. FIG. 11 is a tire inner surface side of a transponder according to another embodiment of the present invention. FIG. 12 is an enlarged perspective view of the tire bead portion showing the location of the transponder according to another embodiment of the present invention. FIG. 13 is a sectional view of the transponder portion according to another embodiment of the present invention. FIG. 15 is a perspective view of a projection portion of a mold for manufacturing another embodiment of the present invention. FIG. 16 is a perspective view of a projection portion of a mold for manufacturing another embodiment of the present invention. FIG. 17 is an enlarged perspective view of a tire bead portion showing the location of a transponder according to another embodiment of the present invention. FIG. 18 is a cross-section of two types of transponder portions according to another embodiment of the present invention. Figure 19 is a perspective view of a portion in which a transponder is fitted into a protrusion of a mold for manufacturing another embodiment of the present invention. FIG. 20 is a perspective view of a protrusion portion of a mold for manufacturing another embodiment of the present invention. Fig. 22 is an enlarged perspective view of a tire bead portion showing the location of a transponder according to another embodiment. Fig. 22 is a layout diagram of a transponder in a conventional tire. Fig. 23 is a schematic diagram of a conventional transponder.
DESCRIPTION OF SYMBOLS 1 Cap tread 2 Belt 3 Side tread 3a The side tread rubber which flowed in 4 Carcass cord 5 Bead wire 6 Finishing 7 Transponder 7a hollow 7b Through hole 7c Tire bead part surface side through hole 7d Tire bead part inner surface side through hole 8 Bead part 9 Gold Mold protrusion 9a Stopper portion 9b Recess 9c Multiple protrusions 10 Conventional transponder 11 Tire A Height from rim flange height to center of transponder H Rim flange height B Covering thickness

Claims

Transponder coated with resin, and wherein at least a portion of the transponder is arranged to be positioned in the tire bead portion within 100mm from the outer surface of the tire protrude, and from the rim flange height radially outward tire Pneumatic tires.

The transponder has a recess, and the pneumatic tire according to claim 1, wherein said transponder, characterized in that the recess is arranged to face the outside of the tire.

The transponder has a through hole, and the transponder is arranged so that one end of the through hole is located on the tire inner side and the other end of the through hole is located on the outer surface side of the tire. The pneumatic tire according to claim 1.

The pneumatic tire according to claim 3, wherein the other end of the through hole is formed in the same size as the one end, or the other end is formed larger than the one end .

The pneumatic tire according to claim 1, wherein, characterized in that at least a portion of the outer surface of the tire side of the transponder is gripped covered with side tread rubber.

Upon at least a portion of the depression or have a through-hole is and coated with a resin transponder arranged protrudes from the outer surface of the tire, fitting the recess or through hole of the front Symbol transponder projections formed on the surface of the mold the pneumatic tire manufacturing method, characterized in that the allowed advance placing the transponder, then by inserting the unvulcanized tire into the mold vulcanization.

Claim 6, characterized in that the indentations or through holes and the fitting of the transponder, is vulcanized in the mold with the projections having an inlet to the recess of the side tread rubber of height less depth of the projections The manufacturing method of the pneumatic tire of description.

The through hole has a large opening on the mold side and has a step on the periphery inside the through hole,
Characterized in that it vulcanized in the mold with the recess depth or outer surface of the tire side opening of the through hole in the higher projection than the depth of up to the step of the transponder, according to claim 6 or 7, wherein the pneumatic Tire manufacturing method.

The method for producing a pneumatic tire according to any one of claims 6 to 8, wherein vulcanization is performed by the mold having a protrusion having a stopper portion larger than a depression or a through hole of the transponder.

The method for manufacturing a pneumatic tire according to any one of claims 6 to 9, wherein vulcanization is performed by the mold having a plurality of protrusions that are fitted into a recess or a through hole of the transponder.