JP4306241B2

JP4306241B2 - SLIP MEMBER, METHOD FOR PRODUCING THE SLIP MEMBER, AND SLIP SEISMIC ISOLATION DEVICE USING THE SLIP MEMBER

Info

Publication number: JP4306241B2
Application number: JP2002360874A
Authority: JP
Inventors: 寛行大越; 照夫荒水; 敏博山根
Original assignee: Oiles Corp
Current assignee: Oiles Corp
Priority date: 2002-12-12
Filing date: 2002-12-12
Publication date: 2009-07-29
Anticipated expiration: 2022-12-12
Also published as: JP2004190804A

Description

【０００１】
【発明の属する技術分野】
本発明は、すべり部材及びすべり部材の製造方法並びに該すべり部材を使用したすべり免震装置に関する。
【０００２】
【従来の技術】
【特許文献１】
特公昭３９−１４８５２号公報
【特許文献２】
特開平１１−１８２０９５号公報
【０００３】
従来、綿布基材入りフェノール樹脂すべり部材を得るにあたり、黒鉛や二硫化モリブデン又は四ふっ化エチレン樹脂の粉末などをフェノール樹脂ワニスに分散含有させたものに綿布基材を浸漬して引上げ、適宜加温して溶剤を逸散してこれら固体潤滑剤が基材に付着含浸せしめられたプレプレグを得、これを成形材料として積層すべり部材とするなどの方法が用いられている。
【０００４】
しかしながら、綿布基材の浸漬、引上げによりプレプレグを形成するに際しての作業性を保つべく、固体潤滑剤の混入割合を比較的低くおさえる必要があり、その結果前記公知の方法で得られた固体潤滑剤入りすべり部材では、あまり摩擦係数が低下され得ず、また必ずしも充分な耐摩耗性が得られない。
【０００５】
加えて、仮に固体潤滑剤の混入割合を高め得たとしても、単なる浸漬によっては繊維基材の繊維組織間隙に樹脂と固体潤滑剤との混合物が充分には充填されず、また該混合物が基材に必ずしも充分には付着され得ず、このようなプレプレグを用いて積層成形すると、得られた成形物が層間剥離を起こす虞があり、その結果すべり部材の機械的強度が著しく低下する虞がある。
【０００６】
このような問題を解決するべく、補強基材に予め合成樹脂ワニスを含浸せしめ、ついでこのワニス含浸基材に固体潤滑剤入りワニスを塗布するか、固体潤滑剤の水分散体を塗布するなどして該基材のほぼ表面にのみ固体潤滑剤を付着せしめるという方法がある（特許文献１所載）。しかしながら、ここに開示された方法においても、すべり部材の低摩擦性、耐摩耗性などが必ずしも充分ではない。
【０００７】
とくに近年において、このようなすべり部材を建築、土木分野における建物や橋梁、高架道路を支持する弾性支承装置と併用して設置し、当該建物等に加わる地震力を減少させるべくすべり免震装置に適用した場合には、低摩擦性及び耐摩耗性の観点から到底使用に耐え難いという問題がある。
【０００８】
このようなすべり部材をすべり免震装置に適用したものとして、不飽和ポリエステル樹脂に四ふっ化エチエン樹脂を添加した樹脂組成物をポリエチレンテレフタレートの織布に含浸してなる免震装置が提案されている（特許文献２所載）。
【０００９】
【発明が解決しようとする課題】
この免震装置は、前記したすべり部材ではなし得なかった免震装置への適用を可能とするものであるが、やはりすべり免震装置としては低摩擦性の点で必ずしも満足のいくものではない。すなわち、すべり免震装置にあっては、摩擦係数の大小によって地震力によるすべり出しに大きく影響し、例えば摩擦係数が０．１程度の場合、地震力が０．１Ｇ（ガル）以上にならないとすべり免震装置はすべり出さず、免震装置の機能を阻害することになる。
【００１０】
本発明は上記実情に鑑みてなされたものであり、その目的とするところは、とくに高負荷条件において低摩擦性を発揮し、大きな地震力から小さな地震力においても充分な免震機能を発揮させることができるすべり免震装置への適用を可能とするすべり部材及びすべり部材の製造方法並びにすべり部材を使用したすべり免震装置を提供することにある。
【００１１】
【課題を解決するための手段】
本発明の第一の態様のすべり部材は、有機繊維又は無機繊維からなると共に繊維組織間隙に四ふっ化エチレン樹脂と熱硬化性合成樹脂とを混在させて充填してなる複数枚の織布を互いに重ね合わせて接合してなる表層材が繊維織布強化熱硬化性合成樹脂からなる基体の表面に一体に接合されており、該表層材には少なくとも一つの凹部が形成されていると共に該表層材の表面には該織布の毛羽立ちが形成されており、該凹部には少なくとも鉛と四ふっ化エチレン樹脂とワックスとからなる潤滑組成物が充填されていると共に、該表層材の表面には毛羽立ちを介して該潤滑組成物の被覆層が形成されていることを特徴とする。
【００１２】
第一の態様のすべり部材によれば、四ふっ化エチレン樹脂と熱硬化性合成樹脂とが繊維組織間隙に混在された複数枚の織布が互いに接合されてなる表層材に形成された凹部には少なくとも鉛と四ふっ化エチレン樹脂とワックスとからなる潤滑組成物が充填されていると共に、表層材の表面には毛羽立ちを介して該潤滑組成物の被覆層が形成されているために、表層材の表面に形成された被覆層には織布の毛羽立ちが食い込んですべり方向に関して被覆層と表層材の表面との結合力が高められている結果、該被覆層に剥離等の不具合を生じることはない。万一、被覆層が摩耗しても、該表層材の凹部に充填された潤滑組成物が表層材の表面に繰り出される結果、長期にわたっての低摩擦性及び耐摩耗性が維持される。
【００１３】
本発明の第二の態様のすべり部材では、第一の態様のすべり部材において、表層材は、有機繊維又は無機繊維からなる織布２５〜３５重量％と熱硬化性合成樹脂３０〜４５重量％と四ふっ化エチレン樹脂２５〜３５重量％とを含んでいる。
【００１４】
第二の態様のすべり部材によれば、織布を形成する繊維組織間隙に熱硬化性合成樹脂と四ふっ化エチレン樹脂との混合物が充分に含浸されているので、表層材に形成された潤滑組成物の被覆層と相俟って低摩擦性及び耐摩耗性を長期にわたって維持することができる。そして、織布に含浸される熱硬化性合成樹脂と四ふっ化エチレン樹脂との配合割合は、表層材としての摩擦摩耗特性の観点から決定され、熱硬化性合成樹脂の配合割合が３０重量％未満では表層材としての接合強度が充分でなく、また４５重量％を超えて配合すると同時に配合される四ふっ化エチレン樹脂の低摩擦性を損う虞がある。また四ふっ化エチレン樹脂は表層材に低摩擦性を付与するものであるが、配合割合が２５重量％未満では表層材に充分な低摩擦性を付与し難く、また３５重量％を超えて配合すると、熱硬化性合成樹脂の具有する接合性を低下させ、結果として表層材の基体からの剥離又は表層材を構成する織布同士の分離を惹起させる虞がある。
【００１５】
本発明の第三の態様のすべり部材では、第一又は第二の態様のすべり部材において、有機繊維は、綿繊維及びアラミド繊維のうちの少なくとも一方の繊維を含んでおり、また本発明の第四の態様のすべり部材では、第一又は第二の態様のすべり部材において、無機繊維は炭素繊維を含んでいる。
【００１６】
これら有機繊維及び無機繊維は、表層材の骨格をなす織布を形成するものである。そして、織布の織物組織は特に限定されるものではなく、平織、斜文織、朱子織などいずれであってもよい。
【００１７】
本発明の第五の態様のすべり部材では、第一から第四のいずれかの態様のすべり部材において、熱硬化性合成樹脂は、エポキシ樹脂、フェノール樹脂及び不飽和ポリエステル樹脂のうちの少なくとも一つの樹脂を含んでいる。
【００１８】
これら熱硬化性合成樹脂は、表層材を形成するにあたり、骨格をなす織布に含浸されてプレプレグを形成するものであり、とくに接合強度の高いエポキシ樹脂が好ましく使用される。
【００１９】
本発明の第六の態様のすべり部材では、第一から第五のいずれかの態様のすべり部材において、凹部は、円柱状の凹部及び互いに直交する二つの矩形長溝からなる凹部のうちの少なくとも一方の凹部を含んでいる。
【００２０】
本発明の第七の態様のすべり部材では、第一から第六のいずれかの態様のすべり部材において、表層材には複数個の凹部が形成されている。
【００２１】
表層材に形成される凹部は、主に潤滑組成物を保持するものであり、とくに形状は限定されないが、加工性等の観点から円柱状の凹部又は互いに直交する二つの矩形長溝からなる凹部であることが好ましく、また、潤滑組成物を表層材の表面に万遍なく繰り出せる形状であれば一個でもよいが、複数個の凹部であるとこれを効果的になし得るので好ましい。
【００２２】
本発明の第八の態様のすべり部材では、第一から第七のいずれかの態様のすべり部材において、潤滑組成物は、鉛５０〜６５重量％と四ふっ化エチレン樹脂１０〜２０重量％とワックス１５〜３０重量％とを含んでいる。
【００２３】
潤滑組成物中の鉛は、高負荷条件下において、摩擦係数が極めて低く、また被膜の形成能に優れ、さらに被膜の自己補修性にも優れているので、潤滑組成物中の四ふっ化エチレン樹脂成分及びワックス成分と相俟って広範囲の条件下において低摩擦性及び耐摩耗性を発揮する。そして、鉛の配合割合が５０重量％未満では潤滑組成物中に占める割合が低くなりすぎて上記した低摩擦性などの鉛が具有する性質が充分発揮されず、また６５重量％を超えて配合すると、後述する結合剤としての役割を果たすワックスの役割を減殺させる虞がある。潤滑組成物中の四ふっ化エチレン樹脂は、鉛と同様低摩擦性を付与する役割を果たすものであり、配合割合が１０重量％未満では低摩擦性が充分発揮されず、また２０重量％を超えて配合すると、上記鉛と同様、ワックスの結合剤としての役割を減殺させる虞がある。潤滑組成物中のワックスは、潤滑組成物中にあって、結合剤の役割を果たすと共に低摩擦性にも寄与する。配合割合が１５重量％未満では結合剤としての役割を充分発揮し得ず、また３０重量％を超えて配合すると摺動時における摩擦熱の影響を受けて流動しやすくなり、表層材の表面との接合力を弱める結果となる。
【００２４】
本発明の第九の態様のすべり部材では、第一から第八のいずれかの態様のすべり部材において、ワックスは、炭素数がおおむね２４以上のパラフィン系ワックス、炭素数がおおむね２６以上のオレフィン系ワックス、炭素数がおおむね２８以上のアルキルベンゼン及び結晶質マイクロクリスタリンワックスなどの炭化水素系ワックスである。
【００２５】
ワックスは潤滑組成物中にあって、結合剤の役割を果たすと共に低摩擦性にも寄与するものであって、斯かる観点において炭化水素系ワックスが好適である。
【００２６】
本発明の第十の態様のすべり部材では、第八又は第九の態様のすべり部材において、潤滑組成物は、さらに高級脂肪酸塩を５〜１５重量％含有している。
【００２７】
潤滑組成物にさらに配合される高級脂肪酸塩は、リチウム（Ｌｉ）、バリウム（Ｂａ）、カルシウム（Ｃａ）などのアルカリ及びアルカリ土類金属のステアリン酸塩から選択されたものが好ましく使用される。この高級脂肪酸塩は潤滑組成物の成形性を向上させるものであり、ワックスの配合量の一部を置き換えることにより、ワックスの作用を充分発揮させつつ潤滑組成物の成形性を向上させることができる。
【００２８】
上記のいずれかの態様のすべり部材を製造するための本発明の第一の態様の製造方法は、有機繊維又は無機繊維からなる織布に四ふっ化エチレン樹脂を分散含有した熱硬化性合成樹脂ワニスをロール成形によって塗工して得たプレプレグを複数枚重ね合わせて表層材を形成する工程と、繊維織布強化熱硬化性合成樹脂からなる基体を準備し、該表層材を基体の表面に載置すると共に、該表層材及び基体を加熱、加圧成形して該基体の表面に表層材を一体に接合する工程と、該表層材に複数個の凹部を形成すると共に該表層材の表面を研磨して該表層材の表面に織布の毛羽立ちを形成する工程と、基体及び表層材を所定の温度に加熱したのち、表層材の表面に少なくとも鉛と四ふっ化エチレン樹脂とワックスとからなる潤滑組成物を一様に散布する工程と、基体と潤滑組成物とを圧縮成形して、該表層材の凹部に該潤滑組成物を充填すると共に該表層材の表面に織布の毛羽立ちを介して該潤滑組成物を被覆する工程とを含んでいる。
【００２９】
第一の態様の製造方法によれば、四ふっ化エチレン樹脂を分散含有した熱硬化性合成樹脂ワニスをロール成形にて織布に塗工するので、織布の繊維組織間隙に熱硬化性合成樹脂と四ふっ化エチレン樹脂との混合物が充分に含浸されたプレプレグを得ることができる。また、表層材の表面に研磨加工を施して表層材の表面の樹脂層を取除くと共に該表層材の表面に織布の毛羽立ちを形成して、この毛羽立ちを介して表層材の表面に該潤滑組成物の被覆層を形成するので、該表層材の表面と潤滑組成物の被覆層との結合力を高めることができ、而して、表層材と潤滑組成物の被覆層との間に剥離等を生じることがないすべり部材を製造できる。さらに、表層材の表面に潤滑組成物を散布するにあたり、基体及び表層材を所定の温度、具体的には潤滑組成物中のワックスの融点近傍の温度（６０℃程度）に加熱するので、表層材の凹部及び表面に潤滑組成物を別途充填被覆用の特別な装置等を必要としないで充填被覆することができる。
【００３０】
熱硬化性合成樹脂は、例えばその初期縮合物をメタノール、アセトン、メチルエチルケトンなどの揮発性溶剤（使用する熱硬化性合成樹脂の種類によって種々の揮発性溶剤が用いられる）に溶かして得られるワニスの形態で適用される。ワニスは、固形分がおおむね３０〜４５重量％、ワニスの粘度はおおむね１００〜７００センチポアズ（ｃＰ）である。これに四ふっ化エチレン樹脂粉末を投入して撹拌混合すると、四ふっ化エチレン樹脂粉末の混入によって混合液の見掛けの粘度は上昇する。混合液の粘度は、該混合液中の四ふっ化エチレン樹脂粉末を均一な分散状態に保つ上では高いほうが好ましいが、あまり粘度が高すぎると織布の繊維組織間隙への加圧充填の段階で、混合液がロールに付着して作業性を悪くするばかりでなく、織布への塗着そのものが困難となる。また、混合液の粘度が低すぎると混入された四ふっ化エチレン樹脂粉末の均一な分散性を損うばかりでなく、混合液の加圧段階で該混合液は四ふっ化エチレン樹脂粉末を伴って織布の裏面に滲み出してしまう虞がある。したがって、混合液の粘度は留意しなければならないが、おおむね８００〜５０００ｃＰ、就中１０００〜４０００ｃＰが好ましい。
【００３１】
潤滑組成物は、基体及び表層材を所定の温度、具体的には潤滑組成物中のワックスの融点近傍の温度（６０℃程度）に加熱し、圧縮成形することにより表層材の凹部に充填され、これにより潤滑組成物からなる被覆層が表層材の表面に形成される。表層材の表面には研磨加工による織布の毛羽立ちが形成されており、該潤滑組成物の被覆層にはこの毛羽立ちが食い込んでいるため、表層材の表面と被覆層との結合力は高められる。
【００３２】
潤滑組成物中のワックスは、該潤滑組成物からなる被覆層を表層材の表面に形成するにあたり、潤滑組成物の結合剤の役割を果たすと共に圧縮成形時の該組成物に流動性を与えるものであり、このワックスの一部を高級脂肪酸塩に置き換えることにより、該潤滑組成物の流動性を助長して圧縮成形による表層材の表面の凹部及び表面への潤滑組成物の充填被覆を容易に行わせる。
【００３３】
上部構造物と下部構造物との間に配設される本発明の第一の態様のすべり免震装置は、上部構造物と下部構造物とのうちのいずれか一方の構造物に固定されるすべり板と、上部構造物と下部構造物とのうちのいずれか他方の構造物に固定されると共に被覆層においてすべり板に摺動自在に接触する上記のいずれかの態様のすべり部材とを具備している。
【００３４】
第一の態様の免震装置によれば、上部構造物又は下部構造物に固定されたすべり部材の表層材には四ふっ化エチレン樹脂が分散含有されており、かつ表層材に形成された複数個の凹部には、少なくとも鉛と四ふっ化エチレン樹脂とワックスとからなる潤滑組成物が充填されていると共に表層材の表面には毛羽立ちを介して該潤滑組成物の被覆層が形成されており、この表層材の凹部及び表層材の表面に充填被覆された被覆層が下部構造物又は上部構造物に固定されたすべり板と摺動することにより、低摩擦性を発揮し、地震力の大小に拘らずすべり出しが速やかに行われるので、大きな地震力から小さな地震力においても充分な免震機能を発揮させることができる。
【００３５】
本発明の第二の態様のすべり免震装置では、第一の態様のすべり免震装置において、すべり板は、その表面に四ふっ化エチレン樹脂を含有するポリアミドイミド樹脂の被覆層を具備しており、すべり部材は、その被覆層においてポリアミドイミド樹脂の被覆層を介してすべり板に摺動自在に接触するようになっている。
【００３６】
第二の態様のすべり免震装置によれば、すべり板は、その表面に形成された四ふっ化エチレン樹脂を含有するポリアミドイミド樹脂の被覆層を介してすべり部材の表層材の凹部及び表面に充填被覆された潤滑組成物の被覆層と摺動することになるので、更に低摩擦性を発揮して地震力の大小に拘らずすべり出しがより迅速に行われることになるので、大きな地震力から小さな地震力においても更に充分な免震機能を発揮させることができる。
【００３７】
特に表層材が有機繊維又は無機繊維からなる織布２５〜３５重量％と熱硬化性合成樹脂３０〜４５重量％と四ふっ化エチレン樹脂２５〜３５重量％とを含んでいると、０．０５以下の低摩擦係数を得ることができるので、斯かる表層材を具備する免震装置では、より大きな地震力から小さな地震力においても十分な免震機能を発揮させることができ、免震周期を長周期化することができる。
【００３８】
次に本発明を、図に示す好ましい実施の形態の例を参照して更に詳細に説明する。なお、本発明はこれら例に何等限定されないのである。
【００３９】
【発明の実施の形態】
図１から図３において、すべり部材１は、繊維織布強化熱硬化性合成樹脂からなる四角柱の基体２と、該基体２の一方の面３に一体に接合された表層材４と、該表層材４に形成された複数個の凹部５と、該表層材４の凹部５に充填され、かつ表層材４の表面６に形成された毛羽立ち７を介して該表層材４の表面６に被覆された潤滑組成物からなる被覆層８とからなる。なお、すべり部材１は、図４に示すように円柱をなすものであってもよく、更に、凹部５は、図４に示すように互いに直交する二つの矩形長溝からなる一個の凹部であってもよい。
【００４０】
図５に示すすべり部材１の基体２の製造装置において、アンコイラ９に巻かれた繊維織布からなる補強基材１０は、送りローラ１１によって熱硬化性合成樹脂ワニス１３を貯えた容器１４に送られ、容器１４内に設けられた案内ローラ１５及び１６によって容器１４内に貯えられた熱硬化性合成樹脂ワニス１３内を通過せしめられることにより、該補強基材１０の表面に該熱硬化性合成樹脂ワニス１３が塗工される。ついで、熱硬化性合成樹脂ワニス１３が塗工された補強基材１０は送りローラ１７によって圧縮ロール１８及び１９に送られ、該圧縮ロール１８及び１９によって補強基材１０の表面に塗工され熱硬化性合成樹脂ワニス１３が繊維組織間隙にまで含浸せしめられる。そして、熱硬化性合成樹脂ワニス１３が含浸塗布された補強基材１０に対して乾燥炉２０内で溶剤を飛ばすと同時に樹脂の反応が進められ、これにより成形可能なプレプレグ（樹脂加工基材）２１が作製される。このようにして得られたプレプレグ２１を図６に示すように所望の寸法に切断してこれを複数枚重ね合わせて積層にしたのち、積層方向に圧縮成形して繊維織布強化熱硬化性合成樹脂からなる基体２が作製される。
【００４１】
基体２に用いられる繊維織布としては、綿布、ガラス繊維布、炭素繊維布などが好適である。また、熱硬化性合成樹脂としては、フェノール樹脂、エポキシ樹脂、不飽和ポリエステル樹脂などが好適であり、これら熱硬化性合成樹脂の揮発性溶剤としては、メタノール、アセトン、メチルエチルケトンなど使用する熱硬化性合成樹脂によって適宜選択される。そして、熱硬化性合成樹脂を揮発性溶剤に溶かして形成される熱硬化性合成樹脂ワニスの固形分は、おおむね３０〜６５重量％であり、樹脂ワニスの粘度は、おおむね８００〜５０００ｃＰ、就中１０００〜４０００ｃＰが好ましい。
【００４２】
表層材４は、前記基体２の製造方法で使用した図５に示す製造装置と同様の製造装置によって同様の製造方法によって作製される。すなわち、アンコイラ９に巻かれた有機繊維又は無機繊維からなる織布２２は、送りローラ１１によって四ふっ化エチレン樹脂粉末と熱硬化性合成樹脂ワニスとの混合液２３を貯えた容器１４に送られ、容器１４内に設けられた案内ローラ１５及び１６によって容器１４内に貯えられた混合液２３内を通過せしめられることにより、該織布２２の表面に該混合液２３が塗工される。ついで、混合液２３が塗工された織布２２は送りローラ１７によって圧縮ロール１８及び１９に送られ、該圧縮ロール１８及び１９によって織布２２の表面に塗工され混合液２３が繊維組織間隙にまで含浸せしめられる。そして、混合液２３が含浸塗布された織布２２に対して乾燥炉２０内で溶剤を飛ばすと同時に樹脂の反応が進められ、これにより成形可能なプレプレグ（樹脂加工基材）２４が作製される。このようにして得られたプレプレグ２４を図６に示すように所望の寸法に切断し、これを複数枚重ね合わせて積層にしたのち、積層方向に圧縮成形して表層材４が作製される。
【００４３】
表層材４に用いられる織布としては、綿繊維、アラミド繊維などの有機繊維からなる織布又は炭素繊維などの無機繊維からなる織布が好適である。とくに、有機繊維としてアラミド繊維を使用する場合は、コポリパラフェニレン・３，４’オキシジフェニレン・テレフタルアミド繊維が好ましい。そして、これら繊維からなる織布の織物組織は、特に限定されるものではなく、平織、斜文織、朱子織などいずれであってもよい。
【００４４】
熱硬化性合成樹脂としては、フェノール樹脂、エポキシ樹脂、不飽和ポリエステル樹脂などが好適であり、これら熱硬化性合成樹脂の揮発性溶剤としては、メタノール、アセトン、メチルエチルケトンなど使用する熱硬化性合成樹脂によって適宜選択される。
【００４５】
四ふっ化エチレン樹脂は、成形用又は固体潤滑用の粉末が使用されるが、上記熱硬化性合成樹脂との混合により、該熱硬化性合成樹脂への均一分散性の観点からは固体潤滑用の粉末が好ましく、その平均粒径はおおよそ１〜５０μｍ、好ましくは１〜３０μｍである。このような四ふっ化エチレン樹脂の具体例としては、三井デュポンフロロケミカル社製の「テフロン７Ｊ、ＴＬＰ−１０（商品名）」、旭硝子社製の「フルオンＧ１６３（商品名）」、ダイキン工業社製の「ポリフロンＭ１５、ルブロンＬ５（いずれも商品名）」、喜多村社製の「ＫＴＬ６１０、ＫＴＬ３５０、ＫＴＬ８Ｎ（いずれも商品名）」などが挙げられる。
【００４６】
そして、表層材４を形成する織布と熱硬化性合成樹脂と四ふっ化エチレン樹脂との割合は、織布２５〜３５重量％、熱硬化性合成樹脂３０〜４５重量％、四ふっ化エチレン樹脂３０〜４５重量％が好ましい範囲である。この割合において、織布に含浸塗着される熱硬化性合成樹脂と四ふっ化エチレン樹脂との配合割合は、表層材４としての摩擦摩耗特性の観点から決定される。熱硬化性合成樹脂の配合割合が３０重量％未満では表層材４としての接合強度が充分でなく、また４５重量％を超えて配合すると同時に配合される四ふっ化エチレン樹脂の低摩擦性を損う虞がある。また、四ふっ化エチレン樹脂は表層材に低摩擦性を付与するものであるが、配合割合が２５重量％未満では表層材に充分な低摩擦性を付与し難く、また３５重量％を超えて配合すると、熱硬化性合成樹脂の具有する接合性を低下させ、結果として表層材の剥離を惹起させる虞がある。
【００４７】
表層材４は、前記基体２の一方の面３に接着剤により一体に接合してもよいが、前記基体２を形成するプレプレグ２１を所望の寸法に切断し、これを複数枚重ね合わせた積層体の一方の面に、表層材４を形成するプレプレグ２４の複数枚を重ね合わせ、積層方向に加熱、加圧成形してプレプレグ２１及び２４の両熱硬化性合成樹脂の硬化と共に一体に接合させることが好ましい。
【００４８】
このように基体２の一方の面３上に一体に接合された表層材４には、その積層方向（厚さ方向）に凹んだ複数個の凹部５が形成されると共に、該表層材４の表面を該表面に付着した熱硬化性合成樹脂と四ふっ化エチレン樹脂とを含む樹脂層を取除くべく、研磨加工すると共にこの研磨加工でもって該表層材４の表面に織布の毛羽立ち７を形成する。
【００４９】
表層材４に形成される複数個の凹部５は、表層材４の表面の面積に占める凹部５の開口部の面積の総和が２０〜３０％の割合となるように形成される。この凹部５は、後述する潤滑組成物を充填保持するものであり、潤滑組成物の低摩擦性等の摩擦特性を良好に発揮させるためには、表層材４の表面の面積に占める凹部５の開口部の面積の総和が少なくとも２０％必要とされる。しかしながら、表層材４の表面の面積に占める凹部５の開口部の面積の総和が３０％を超えると表層材４の強度低下を来すことになる。
【００５０】
凹部５は、ドリル等を用いた穴あけ加工でもって形成してもよいが、プレプレグ２１及び２４の両熱硬化性合成樹脂の硬化と共にプレス加工でもって形成してもよい。
【００５１】
表層材４の表面の研磨加工による毛羽立ち７は、後述する潤滑組成物を表層材４の表面に被覆するさいに被覆層８に食い込み、これにより表層材４の表面と潤滑組成物の被覆層８との結合力が高められる。
【００５２】
表層材４に形成された複数個の凹部５及び表層材４の表面に充填被覆される潤滑組成物は、鉛５０〜６５重量％と四ふっ化エチレン樹脂１０〜２０重量％とワックス１５〜３０重量％とを含んでいる。
【００５３】
鉛は、アトマイズ鉛粉末が好ましく、その粒子形状がほぼ粒状を呈しており、日本工業規格標準篩で２００メッシュ、好ましくは２５０メッシュを通過する粉末であることが好ましい。このアトマイズ鉛粉末は、粒子形状が不定形のスタンプ（搗砕）鉛粉末と異なり、同一の粒度分布において、見掛密度が大きく粉末の凝集性も極めて小さい。例えば、２５０メッシュを９０％以上通過するスタンプ鉛粉において、見掛密度が１．９〜２．４ｇ／ｃｍ^３であるのに対し、アトマイズ鉛粉末は同一粒度分布において５．２〜５．８ｇ／ｃｍ^３である。このアトマイズ鉛粉末は、他の成分との混合性にすぐれ、均質な分散体が得られること、混合物としたのちの粉体流動性にすぐれること、加温された状態での酸化の傾向が著しく小さいこと、などの特性を有するものである。
【００５４】
鉛は、高負荷条件下において摩擦係数が極めて低く、また被膜の形成能に優れ、さらに被膜の自己補修性にも優れているので、潤滑組成物中の四ふっ化エチレン樹脂及びワックスと相俟って広範囲の条件下において低摩擦性及び耐摩耗性を発揮する。そして、鉛の配合割合が５０重量％未満では潤滑組成物中に占める割合が低くなりすぎて上記した低摩擦性などの鉛が具有する性質が充分発揮されず、また６５重量％を超えて配合すると、後述する結合剤としての役割を果たすワックスの役割を減殺させる虞がある。したがって、鉛の配合割合は４５〜６５重量％が適当である。
【００５５】
四ふっ化エチレン樹脂は、前述した四ふっ化エチレン樹脂と同様、成形用又は固体潤滑用の粉末が使用されるが、とくに成形用の四ふっ化エチレン樹脂粉末、具体的には三井デュポンフロロケミカル社製の「テフロン７Ｊ（商品名）」が挙げられる。四ふっ化エチレン樹脂は、潤滑組成物中にあって、上記鉛と同様、低摩擦性に寄与するものであり、配合割合が１０重量％未満では低摩擦性が充分発揮されず、また２０重量％を超えて配合すると、上記鉛と同様、ワックスの結合剤としての役割を減殺させる虞がある。したがって、四ふっ化エチレン樹脂の配合割合は１０〜２０重量％が適当である。
【００５６】
ワックスは、炭素数がおおむね２４以上のパラフィン系ワックス、炭素数がおおむね２６以上のオレフィン系ワックス、炭素数がおおむね２８以上のアルキルベンゼン及び結晶質マイクロクリスタリンワックスなどの炭化水素系ワックスが使用される。とくに、炭素数がおおむね２４以上のパラフィン系ワックス、具体的には日興ファインプロダクツ社製の「ゴデスワックス（商品名）」は好ましいものとして挙げることができる。ワックスは潤滑組成物中にあって、結合剤の役割を果たすと共に低摩擦性にも寄与するものであり、配合割合が１５重量％未満では結合剤としての役割を充分発揮し得ず、また３０重量％を超えて配合すると摺動時における摩擦熱の影響を受けて流動しやすくなり、表層材の表面との接合力を弱める結果となる。したがって、ワックスの配合割合は１５〜３０重量％が適当である。
【００５７】
上記鉛粉末と四ふっ化エチレン樹脂粉末とワックスとからなる潤滑組成物において、ワックスの一部を高級脂肪酸塩に置き換えることができる。この高級脂肪酸塩は、潤滑組成物の成形性を向上させる効果を発揮するものである。この高級脂肪酸塩としては、リチウム（Ｌｉ）、バリウム（Ｂａ）、カルシウム（Ｃａ）などのアルカリ及びアルカリ土類金属のステアリン酸塩から選択されて使用される。そして、高級脂肪酸塩の配合割合は５〜１５重量％が適当である。
【００５８】
上述した成分組成からなる潤滑組成物は、次のようにして表層材４の表面に充填被覆される。基体２と、該基体２の一方の表面に一体に接合されかつ複数個の凹部５及び織布の毛羽立ち７が形成された表層材４とを予め潤滑組成物中のワックスの融点近傍の温度に加温したのち、該表層材４の表面上に潤滑組成物を一様に散布する。ついで、基体２と表層材４と潤滑組成物とを厚さ方向に圧縮成形することにより、該表層材４の表面上に一様に散布された潤滑組成物は流動して該凹部５を充填すると共に、表層材４の表面に形成された織布の毛羽立ち７を介して被覆層８を形成する。この被覆層８には織布の毛羽立ち７が食い込むことによって、該被覆層８と表層材４の表面との接合力が高められる。
【００５９】
このようにして、繊維織布強化熱硬化性合成樹脂からなる基体２と、該基体２の一方の面３に一体に接合された表層材４と、該表層材４に形成された複数個の凹部５と、該表層材４の凹部５に充填され、かつ表層材４の表面６に形成された毛羽立ち７を介して該表層材４の表面６に被覆された潤滑組成物からなる被覆層８とからなるすべり部材１が作製される。
【００６０】
このすべり部材１を使用したすべり免震装置を図７に示す。図７において、建物、橋梁、高架道路等の上部構造物Ｇには、前記すべり部材１が固定されており、基礎等の下部構造物Ｂにはすべり板２５が固定されており、該すべり板２５の表面とすべり部材１の表層材４の表面の複数個の凹部５及び該表層材４の表面に織布の毛羽立ち７を介して充填被覆された潤滑組成物の被覆層８とが摺動面となっている。
【００６１】
すべり板２５としては、ステンレス鋼板（ＳＵＳ４０３）又はステンレス鋼板とその一方の表面に被覆層２６とを有するすべり板が使用される。
【００６２】
ステンレス鋼板の一方の表面への被覆層の形成方法について述べる。ポリアミドイミド樹脂粉末に対し２５〜７５重量％の四ふっ化エチレン樹脂粉末を配合して混合物を形成したのち、混合物を有機溶剤に溶かして固形分が３０〜４０重量％の溶液を作製する。ショットブラスト、脱脂など通常一般に行われている処理を施したステンレス鋼板に刷毛塗り、吹き付けなどの手段により塗膜を形成し、硬化処理を行って硬化塗膜を得る。塗膜形成後の硬化は、塗膜形成後、自然乾燥によるか、熱風乾燥炉で３０分間程度予備乾燥を行って溶剤を逸散させた後、２３０℃で３０分間程度加熱焼付して行う。このようにして得られる被覆層２６はおおよそ２０〜２５μｍの厚さである。
【００６３】
被覆層２６を有するすべり板２５は、すべり部材１の表層材４の凹部５及び表層材４の表面に充填被覆された被覆層８と被覆層２６において摺動することになり、低摩擦性を発揮し、地震力の大小に拘らずすべり出しが速やかに行われるので、大きな地震力から小さな地震力においても充分な免震機能を発揮させることができる。
【００６４】
【実施例】
つぎに本発明を実施例に基づいて詳細に説明する。なお、本発明はこれらの実施例に何等限定されないのである。
【００６５】
〔すべり板の作製〕
幅６２ｍｍ、長さ１７８ｍｍのステンレス鋼板（ＳＵＳ３０４）を準備し、この鋼板の一方の表面をショットブラストにより粗面化すると共に脱脂処理を施した。四ふっ化エチレン樹脂粉末として、ダイキン工業社製の「ルブロンＬ５」を３５重量％含有するポリアミドイミド樹脂粉末を有機溶剤に溶かして得た固形分が３０重量％の溶液を、上記鋼板の粗面化した面に吹き付け手段により塗膜を形成し、熱風乾燥炉で３０分間予備乾燥を行って溶剤を逸散させた後、２３０℃で３０分間加熱焼付を行い、厚さ２３μｍの被覆層を形成し、これをすべり板とした。
【００６６】
〔基体の作製〕
強化繊維布として平織綿布を準備し、該綿布を送りロールにて、樹脂固形分６４．５重量％のフェノール樹脂ワニスを貯えた容器内を通過させて、該綿布の表面に樹脂ワニスを塗工し、圧縮ロールによって綿布の表面に塗工され樹脂ワニスを繊維組織間隙にまで含浸せしめたのち、乾燥炉内で溶剤を飛ばすと同時に樹脂の反応を進めプレプレグ（樹脂加工綿布）を得た。このプレプレグを直径３０ｍｍの円形状に切断し、これを５枚重ね合わせた。
【００６７】
〔表層材の作製〕
織布として、コポリパラフェニレン・３，４’オキシジフェニレン・テレフタルアミド繊維（帝人社製の「テクノーラ（商品名）」）を平織したアラミド繊維織布を準備し、該アラミド繊維織布を送りロールにて、エポキシ樹脂と四ふっ化エチレン樹脂（ダイキン工業社製の「ルブロンＬ５（商品名）」）との混合樹脂ワニスを貯えた容器内を通過させて、該アラミド繊維織布の表面に混合樹脂ワニスを塗工し、圧縮ロールによってアラミド繊維織布の表面に塗工され混合樹脂ワニスを繊維組織間隙にまで含浸せしめたのち、乾燥炉内で溶剤を飛ばすと同時に樹脂の反応を進め、アラミド繊維織布３０重量％とエポキシ樹脂３９重量％と四ふっ化エチレン樹脂３１重量％とからなるプレプレグ（樹脂加工アラミド繊維織布）を得た。このプレプレグを直径６０ｍｍの円形状に切断し、これを３枚重ね合わせた。
【００６８】
前記５枚重ね合わせたプレプレグ（樹脂加工綿布）の上に、３枚重ね合わせたプレプレグ（樹脂加工アラミド繊維織布）を載せ、厚さ方向に成形圧力７０ｋｇ／ｃｍ^２、成形温度１６０℃、成形時間１０分間の条件で圧縮成形し、基体と表層材とを一体に接合した積層体（基体の厚さ７．５ｍｍ、表層材の厚さ３ｍｍ）を得た。
【００６９】
この積層体の表層材に直径８ｍｍ、深さ３ｍｍの円形凹部を１２個形成（表層材の表面の面積に占める凹部の開口部の面積の総和は２１％）すると共に、表層材の表面に形成された樹脂層を研磨加工を施して取除き、該表層材の表面に研磨加工による毛羽立ちを形成した。
【００７０】
〔潤滑組成物（１）の作製〕
２５０メッシュを通過するアトマイズ鉛粉末５０〜６５重量％と、四ふっ化エチレン樹脂粉末として三井デュポンフロロケミカル社製の「テフロン７Ｊ（商品名）」１０〜２０重量％と、ワックスとして日興ファインプロダクツ社製の「ゴデスワックス（商品名）」１５〜３０重量％とを撹拌混合して潤滑組成物（１）を作製した。
【００７１】
〔潤滑組成物（２）の作製〕
２５０メッシュを通過するアトマイズ鉛粉末５０〜６５重量％と、四ふっ化エチレン樹脂粉末として三井デュポンフロロケミカル社製の「テフロン７Ｊ（商品名）」１０〜２０重量％と、ワックスとして日興ファインプロダクツ社製の「ゴデスワックス（商品名）」１５〜２５重量％と、高級脂肪酸塩としてステアリン酸リチウム５〜１５重量％とを撹拌混合して潤滑組成物（２）を作製した。
【００７２】
実施例１〜３
上記表層材の表面に毛羽立ちを形成した積層体を、予め潤滑組成物（１）中のワックスの融点である６０℃の温度に加温したのち、表層材の表面上に潤滑組成物（１）を表１に示す成分組成で一様に散布し、ついで、厚さ方向に圧縮成形して円形の凹部に該潤滑組成物（１）を充填すると共に表面の毛羽立ちを介して表層材の表面に潤滑組成物（１）なる被覆層を形成した。
【００７３】
【表１】

【００７４】
実施例４〜６
上記表層材に円形の凹部を１３個形成すると共に、表層材の表面に毛羽立ちを形成した積層体を、予め潤滑組成物（２）中のワックスの融点である６０℃の温度に加温したのち、表層材の表面上に潤滑組成物（２）を表２に示す成分組成で一様に散布し、ついで、厚さ方向に圧縮成形して円形凹部に該潤滑組成物（２）を充填すると共に表面の毛羽立ちを介して表層材の表面に潤滑組成物（２）からなる被覆層を形成した。
【００７５】
【表２】

【００７６】
比較例
アラミド繊維織布３０重量％とエポキシ樹脂３９重量％と四ふっ化エチレン樹脂３１重量％とからなるプレプレグ３枚を、平織綿布にフェノール樹脂ワニスを含浸塗工したプレプレグ５枚の上に載せ、これらを圧縮成形し、基体と表層材とを一体に接合した積層体をすべり部材とした。
【００７７】
つぎに、上記実施例１〜６のすべり部材及び比較例からなるすべり部材について、下記に示す試験条件１及び試験条件２にて摩擦性能を試験した。
【００７８】
＜試験条件１＞
面圧１４．７ＭＰａ
加振速度１ｋｉｎｅ２０ｋｉｎｅ
相手材上記すべり板を使用
試験方法二軸試験機の台上に被覆層を上方にしてすべり板を固定し、該すべり板の被覆層にすべり部材の表層材を摺動自在に接触させると共に、該すべり部材に面圧が１４．７ＭＰａとなるように荷重を加え、すべり板側に図８に示す合成波を供給し、該合成波にて加振（振幅±６５ｍｍ）を連続して５回行った。
【００７９】
＜試験条件２＞
面圧２９．４ＭＰａ
加振速度１ｋｉｎｅ２０ｋｉｎｅ
相手材上記すべり板を使用
試験方法二軸試験機の台上に被覆層を上方にしてすべり板を固定し、該すべり板の被覆層にすべり部材の表層材を摺動自在に接触させると共に、該すべり部材に面圧が２９．４ＭＰａとなるように荷重を加え、試験条件１と同様、すべり板側に図８に示す合成波を供給し、該合成波にて加振を連続して５回行った。
【００８０】
上記試験条件１及び試験条件２で行った実施例１〜６及び比較例からなるすべり部材の加振速度１ｋｉｎｅ及び加振速度２０ｋｉｎｅでの摩擦係数を表３（試験条件１）及び表４（試験条件２）に示す。
【００８１】
【表３】

【００８２】
【表４】

【００８３】
以上の試験結果から、実施例１〜６のすべり部材とすべり板との組合わせにおいては、面圧１４．７ＭＰａで加振速度が１ｋｉｎｅ及び２０ｋｉｎｅの条件では、摩擦係数が０．０５以下の低い値を示し、とくに面圧２９．４ＭＰａで加振速度１ｋｉｎｅ及び２０ｋｉｎｅの条件では、潤滑組成物中の鉛成分の作用が発揮され、摩擦係数が０．０４以下という低い値を示した。
【００８４】
これらの結果をすべり免震装置に適用した場合、すべり部材とすべり板との組合わせにおける摩擦係数が０．０５以下を示すことにより、すべり出しの加速度を小さく保ったまま免震周期の長周期化が可能となる。また、すべり免震装置の設計自由度を大幅に増大させることができる。
【００８５】
【発明の効果】
本発明によれば、大きな地震力から小さな地震力においても充分な免震機能を発揮させることができるすべり部材及びすべり部材の製造方法並びにすべり部材を使用したすべり免震装置を提供することができる。本発明のすべり部材を使用したすべり免震装置においては、摩擦係数が０．０５以下の低い値を示すことからすべり出しの加速度を小さく保ったまま免震周期の長周期化が可能となるばかりでなく、すべり免震装置の設計自由度を大幅に増大させることができる。
【図面の簡単な説明】
【図１】本発明のすべり部材の平面図である。
【図２】図１のＩＩ−ＩＩ線矢視断面図である。
【図３】図２の要部拡大断面図である。
【図４】本発明のすべり部材の他の例の平面図である。
【図５】製造工程を示す説明図である。
【図６】プレプレグの積層状態を示す斜視図である。
【図７】すべり免震装置を示す説明図である。
【図８】試験に使用した合成波を示すグラフである。
【符号の説明】
１すべり部材
２基材
４表層材
５凹部
７毛羽立ち
８被覆層
２５すべり板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding member, a method for manufacturing the sliding member, and a sliding seismic isolation device using the sliding member.
[0002]
[Prior art]
[Patent Document 1]
Japanese Examined Patent Publication No. 39-14852
[Patent Document 2]
JP-A-11-182095
[0003]
Conventionally, in order to obtain a phenol resin sliding member containing a cotton cloth base material, the cotton cloth base material is immersed in a phenol resin varnish dispersed with graphite, molybdenum disulfide or ethylene tetrafluoride resin powder, and then pulled up appropriately. A method is used in which a prepreg in which a solid lubricant is adhered and impregnated on a base material is obtained by heating to dissipate the solvent, and this is used as a laminated sliding member as a molding material.
[0004]
However, in order to maintain the workability when forming the prepreg by dipping and pulling up the cotton fabric base material, it is necessary to keep the mixing ratio of the solid lubricant relatively low. As a result, the solid lubricant obtained by the above-mentioned known method In the sliding member, the friction coefficient cannot be lowered so much and sufficient wear resistance cannot be obtained.
[0005]
In addition, even if the mixing ratio of the solid lubricant can be increased, the mixture of the resin and the solid lubricant is not sufficiently filled in the fiber structure gap of the fiber base material by simple dipping. When the prepreg is used for lamination molding, the resulting molded product may cause delamination, and as a result, the mechanical strength of the sliding member may be significantly reduced. is there.
[0006]
In order to solve such a problem, a reinforcing base material is impregnated with a synthetic resin varnish in advance, and then a varnish containing a solid lubricant is applied to the varnish-impregnated base material, or an aqueous dispersion of a solid lubricant is applied. For example, there is a method in which a solid lubricant is attached only to substantially the surface of the substrate (described in Patent Document 1). However, even in the method disclosed herein, the low friction and wear resistance of the sliding member are not always sufficient.
[0007]
In particular, in recent years, such slip members have been installed in combination with elastic bearing devices that support buildings, bridges, and elevated roads in the construction and civil engineering fields. When applied, there is a problem that it is difficult to withstand use from the viewpoint of low friction and wear resistance.
[0008]
As an application of such a sliding member to a sliding seismic isolation device, there has been proposed a seismic isolation device in which a woven fabric of polyethylene terephthalate is impregnated with a resin composition obtained by adding an ethylene tetrafluoride resin to an unsaturated polyester resin. (Patent Document 2).
[0009]
[Problems to be solved by the invention]
This seismic isolation device can be applied to a seismic isolation device that could not be achieved by the above-mentioned sliding member, but it is not necessarily satisfactory in terms of low friction as a sliding seismic isolation device. . In other words, the slip isolation device greatly affects the slippage due to the seismic force due to the magnitude of the friction coefficient. For example, when the friction coefficient is about 0.1, the slippage must be less than 0.1 G (gal). The seismic isolation device does not slide out, and the function of the seismic isolation device is hindered.
[0010]
The present invention has been made in view of the above circumstances, and the object of the present invention is to exhibit low friction properties particularly under high load conditions, and to exhibit a sufficient seismic isolation function even from a large seismic force to a small seismic force. An object of the present invention is to provide a sliding member, a method for manufacturing the sliding member, and a sliding seismic isolation device using the sliding member, which can be applied to a sliding seismic isolation device.
[0011]
[Means for Solving the Problems]
The sliding member of the first aspect of the present invention comprises a plurality of woven fabrics made of organic fibers or inorganic fibers and filled with a mixture of a tetrafluoroethylene resin and a thermosetting synthetic resin in the gap between the fiber structures. A surface layer material formed by overlapping and bonding each other is integrally bonded to the surface of a substrate made of a fiber woven cloth reinforced thermosetting synthetic resin, and at least one recess is formed in the surface layer material. The surface of the material is formed with fluff of the woven fabric, and the concave portion is filled with a lubricating composition comprising at least lead, tetrafluoroethylene resin and wax, and the surface of the surface layer material is formed on the surface. A coating layer of the lubricating composition is formed through fluffing.
[0012]
According to the sliding member of the first aspect, in the concave portion formed in the surface layer material formed by joining a plurality of woven fabrics in which the tetrafluoroethylene resin and the thermosetting synthetic resin are mixed in the fiber structure gap are bonded to each other. Is filled with a lubricating composition comprising at least lead, a tetratetrafluoroethylene resin and a wax, and a coating layer of the lubricating composition is formed on the surface of the surface material through fluffing. The coating layer formed on the surface of the material has fluffed in the woven fabric. As a result of the increased bonding force between the coating layer and the surface of the surface layer in the sliding direction, problems such as peeling may occur in the coating layer. There is no. Even if the coating layer is worn out, the lubricating composition filled in the concave portion of the surface layer material is drawn out to the surface of the surface layer material, so that low friction and wear resistance are maintained over a long period of time.
[0013]
In the sliding member of the second aspect of the present invention, in the sliding member of the first aspect, the surface layer material is 25 to 35% by weight of a woven fabric made of organic fibers or inorganic fibers and 30 to 45% by weight of a thermosetting synthetic resin. And 25 to 35% by weight of tetrafluoroethylene resin.
[0014]
According to the sliding member of the second aspect, since the mixture of the thermosetting synthetic resin and the tetrafluoroethylene resin is sufficiently impregnated in the fiber structure gap forming the woven fabric, the lubrication formed on the surface layer material In combination with the coating layer of the composition, low friction and wear resistance can be maintained over a long period of time. The blending ratio of the thermosetting synthetic resin impregnated into the woven fabric and the ethylene tetrafluoride resin is determined from the viewpoint of frictional wear characteristics as a surface layer material, and the blending ratio of the thermosetting synthetic resin is 30% by weight. If it is less than 1, the bonding strength as the surface layer material is not sufficient, and there is a possibility that the low friction property of the ethylene tetrafluoride resin blended at the same time as blending exceeding 45% by weight may be impaired. In addition, ethylene tetrafluoride resin imparts low friction to the surface layer material, but if the blending ratio is less than 25% by weight, it is difficult to impart sufficient low friction to the surface layer material, and it exceeds 35% by weight. As a result, the bonding property of the thermosetting synthetic resin is lowered, and as a result, there is a risk of causing separation of the surface layer material from the substrate or separation of the woven fabrics constituting the surface layer material.
[0015]
In the sliding member of the third aspect of the present invention, in the sliding member of the first or second aspect, the organic fiber includes at least one fiber of cotton fiber and aramid fiber, and In the sliding member of the fourth aspect, in the sliding member of the first or second aspect, the inorganic fiber includes carbon fiber.
[0016]
These organic fibers and inorganic fibers form a woven fabric that forms the skeleton of the surface layer material. The woven structure of the woven fabric is not particularly limited, and may be any of plain weave, oblique weave, satin weave, and the like.
[0017]
In the sliding member of the fifth aspect of the present invention, in the sliding member of any one of the first to fourth aspects, the thermosetting synthetic resin is at least one of an epoxy resin, a phenol resin, and an unsaturated polyester resin. Contains resin.
[0018]
These thermosetting synthetic resins are those which are impregnated into a woven fabric forming a skeleton to form a prepreg when forming a surface layer material, and epoxy resins having particularly high bonding strength are preferably used.
[0019]
In the sliding member of the sixth aspect of the present invention, in the sliding member of any one of the first to fifth aspects, the concave portion is at least one of a cylindrical concave portion and a concave portion consisting of two rectangular long grooves orthogonal to each other. The recess is included.
[0020]
In the sliding member according to the seventh aspect of the present invention, in the sliding member according to any one of the first to sixth aspects, a plurality of recesses are formed in the surface layer material.
[0021]
The recess formed in the surface layer material mainly holds the lubricating composition, and the shape is not particularly limited, but from the viewpoint of workability and the like, it is a cylindrical recess or a recess made of two rectangular long grooves orthogonal to each other. It is preferable that there is a single shape as long as the lubricating composition can be uniformly fed to the surface of the surface layer material, but a plurality of concave portions is preferable because this can be effectively achieved.
[0022]
In the sliding member according to the eighth aspect of the present invention, in the sliding member according to any one of the first to seventh aspects, the lubricating composition comprises 50 to 65% by weight of lead and 10 to 20% by weight of ethylene tetrafluoride resin. 15 to 30% by weight of wax.
[0023]
Lead in the lubricating composition has an extremely low coefficient of friction under high load conditions, excellent film-forming ability, and excellent self-repairability of the film. Therefore, ethylene tetrafluoride in the lubricating composition Combined with the resin component and the wax component, it exhibits low friction and wear resistance under a wide range of conditions. And if the blending ratio of lead is less than 50% by weight, the ratio in the lubricating composition becomes too low, and the properties possessed by lead such as the low friction mentioned above are not fully exhibited, and the blending exceeds 65% by weight. Then, there exists a possibility of reducing the role of the wax which plays the role as a binder mentioned later. The ethylene tetrafluoride resin in the lubricating composition plays a role of imparting low friction like lead, and if the blending ratio is less than 10% by weight, the low friction is not sufficiently exhibited, and 20% by weight is achieved. When it mixes exceeding it, there exists a possibility of reducing the role as a binder of wax like the said lead. The wax in the lubricating composition is in the lubricating composition and serves as a binder and contributes to low friction. If the blending ratio is less than 15% by weight, the role as a binder cannot be sufficiently exerted, and if it exceeds 30% by weight, it tends to flow under the influence of frictional heat during sliding, This results in weakening the bonding force.
[0024]
In the sliding member according to the ninth aspect of the present invention, in the sliding member according to any one of the first to eighth aspects, the wax is a paraffinic wax having a carbon number of approximately 24 or more, and an olefinic material having a carbon number of approximately 26 or more. These are hydrocarbon waxes such as wax, alkylbenzene having about 28 or more carbon atoms, and crystalline microcrystalline wax.
[0025]
The wax is present in the lubricating composition and serves as a binder and also contributes to low friction. From this viewpoint, a hydrocarbon wax is preferable.
[0026]
In the sliding member of the tenth aspect of the present invention, in the sliding member of the eighth or ninth aspect, the lubricating composition further contains 5 to 15% by weight of a higher fatty acid salt.
[0027]
The higher fatty acid salt further blended in the lubricating composition is preferably selected from alkali and alkaline earth metal stearates such as lithium (Li), barium (Ba) and calcium (Ca). This higher fatty acid salt improves the moldability of the lubricating composition. By replacing a part of the amount of the wax, the moldability of the lubricating composition can be improved while fully exhibiting the action of the wax. .
[0028]
The production method according to the first aspect of the present invention for producing the sliding member according to any one of the aspects described above is a thermosetting synthetic resin in which a tetrafluoroethylene resin is dispersedly contained in a woven fabric made of organic fibers or inorganic fibers. A step of forming a surface layer material by laminating a plurality of prepregs obtained by coating varnish by roll forming, and preparing a substrate made of a fiber woven cloth reinforced thermosetting synthetic resin, the surface layer material on the surface of the substrate Placing the surface layer material and the substrate by heating and pressure forming and integrally bonding the surface layer material to the surface of the substrate; forming a plurality of recesses in the surface layer material and the surface of the surface layer material Polishing the surface of the surface material to form fluff of the woven fabric, heating the substrate and the surface material to a predetermined temperature, and then at least the surface of the surface material from lead, tetrafluoroethylene resin and wax. Evenly spray the lubricating composition A step of compressing and molding the substrate and the lubricating composition, filling the concave portion of the surface layer material with the lubricating composition, and coating the surface of the surface layer material with fluff of woven fabric Process.
[0029]
According to the manufacturing method of the first aspect, since the thermosetting synthetic resin varnish dispersed and containing the tetrafluoroethylene resin is applied to the woven fabric by roll molding, the thermosetting synthesis is performed in the fiber structure gap of the woven fabric. A prepreg sufficiently impregnated with a mixture of a resin and a tetrafluoroethylene resin can be obtained. In addition, the surface of the surface material is ground to remove the resin layer on the surface of the surface material, and the surface of the surface material is formed with fluff of woven cloth, and the surface of the surface material is lubricated through the fluff. Since the coating layer of the composition is formed, it is possible to increase the bonding force between the surface of the surface layer material and the coating layer of the lubricating composition, and thus, peeling between the surface layer material and the coating layer of the lubricating composition. It is possible to manufacture a sliding member that does not cause the above. Further, when the lubricating composition is sprayed on the surface of the surface layer material, the substrate and the surface layer material are heated to a predetermined temperature, specifically, a temperature near the melting point of the wax in the lubricating composition (about 60 ° C.). The lubricating composition can be filled and coated on the recesses and the surface of the material without requiring a special device for filling and coating.
[0030]
A thermosetting synthetic resin is, for example, a varnish obtained by dissolving its initial condensate in a volatile solvent such as methanol, acetone or methyl ethyl ketone (various volatile solvents are used depending on the type of thermosetting synthetic resin used). Applied in form. The varnish has a solid content of approximately 30 to 45% by weight, and the varnish has a viscosity of approximately 100 to 700 centipoise (cP). When the tetrafluoroethylene resin powder is added to this and stirred and mixed, the apparent viscosity of the mixed solution increases due to the mixing of the tetrafluoroethylene resin powder. The viscosity of the mixed solution is preferably high in order to keep the tetrafluoroethylene resin powder in the mixed solution in a uniform dispersion state. However, if the viscosity is too high, the step of pressure filling the fiber structure gap of the woven fabric Thus, not only does the mixed solution adhere to the roll and the workability deteriorates, but also the application to the woven fabric itself becomes difficult. In addition, if the viscosity of the mixed solution is too low, not only the uniform dispersibility of the mixed ethylene tetrafluoride resin powder is impaired, but the mixed solution is accompanied by the tetrafluoroethylene resin powder at the pressurizing stage of the mixed solution. May ooze out on the back of the fabric. Therefore, the viscosity of the mixed solution must be noted, but is generally 800 to 5000 cP, and preferably 1000 to 4000 cP.
[0031]
The lubricating composition is filled in the concave portions of the surface layer material by heating the substrate and the surface layer material to a predetermined temperature, specifically, a temperature in the vicinity of the melting point of the wax in the lubricating composition (about 60 ° C.) and compression molding. Thus, a coating layer made of the lubricating composition is formed on the surface of the surface layer material. Since the surface of the surface material is lapped with a woven fabric by polishing, and the surface of the surface material is enhanced, the surface of the surface material is enhanced. .
[0032]
The wax in the lubricating composition serves as a binder for the lubricating composition and provides fluidity to the composition during compression molding when forming a coating layer comprising the lubricating composition on the surface of the surface layer material. By replacing a part of this wax with a higher fatty acid salt, the fluidity of the lubricating composition is promoted and the surface of the surface layer material by compression molding is easily filled with the lubricating composition on the surface. Let it be done.
[0033]
The sliding seismic isolation device according to the first aspect of the present invention disposed between the upper structure and the lower structure is fixed to either one of the upper structure and the lower structure. A sliding plate, and the sliding member according to any one of the above aspects, which is fixed to one of the upper structure and the lower structure and slidably contacts the sliding plate in the coating layer. is doing.
[0034]
According to the seismic isolation device of the first aspect, the surface layer material of the sliding member fixed to the upper structure or the lower structure contains ethylene tetrafluoride resin dispersedly, and a plurality of layers formed on the surface material Each recess is filled with a lubricating composition comprising at least lead, ethylene tetrafluoride resin, and wax, and a coating layer of the lubricating composition is formed on the surface of the surface material through fluffing. The surface layer material has a concave portion and a coating layer filled and coated on the surface of the surface material, which slides on the lower structure or the sliding plate fixed to the upper structure, thereby exhibiting low friction and increasing the magnitude of the seismic force. Regardless of the condition, the sliding is performed promptly, so that a sufficient seismic isolation function can be exhibited even from a large seismic force to a small seismic force.
[0035]
In the sliding seismic isolation device of the second aspect of the present invention, in the sliding seismic isolation device of the first aspect, the slip plate has a polyamide-imide resin coating layer containing an ethylene tetrafluoride resin on its surface. The sliding member is slidably in contact with the sliding plate through the polyamideimide resin coating layer in the coating layer.
[0036]
According to the slip isolation device of the second aspect, the slip plate is formed on the concave portion and the surface of the surface material of the slip member through the polyamideimide resin coating layer containing the ethylene tetrafluoride resin formed on the surface. Since it slides with the coating layer of the filled lubricating composition, it will exhibit even lower friction and slide out more quickly regardless of the magnitude of the seismic force. Even with a small seismic force, a sufficient seismic isolation function can be exhibited.
[0037]
In particular, when the surface layer material includes 25 to 35% by weight of a woven fabric made of organic fiber or inorganic fiber, 30 to 45% by weight of thermosetting synthetic resin, and 25 to 35% by weight of ethylene tetrafluoride resin, 0.05 Since the following low friction coefficient can be obtained, the seismic isolation device having such a surface layer material can exhibit a sufficient seismic isolation function from a large seismic force to a small seismic force, and the seismic isolation cycle can be reduced. The period can be increased.
[0038]
The invention will now be described in more detail with reference to the preferred embodiment examples shown in the drawings. The present invention is not limited to these examples.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1 to FIG. 3, the sliding member 1 includes a rectangular column base 2 made of a fiber woven cloth reinforced thermosetting synthetic resin, a surface layer material 4 integrally bonded to one surface 3 of the base 2, A plurality of recesses 5 formed on the surface layer material 4, and the surface 6 of the surface layer material 4 is covered via the fluffs 7 formed in the surface layer 6 of the surface layer material 4. And a coating layer 8 made of the lubricating composition. The sliding member 1 may have a cylindrical shape as shown in FIG. 4, and the concave portion 5 is a single concave portion composed of two rectangular long grooves perpendicular to each other as shown in FIG. Also good.
[0040]
In the manufacturing apparatus for the base 2 of the sliding member 1 shown in FIG. 5, the reinforcing base material 10 made of a fiber woven fabric wound around an uncoiler 9 is fed by a feed roller 11 to a container 14 in which a thermosetting synthetic resin varnish 13 is stored. By passing through the thermosetting synthetic resin varnish 13 stored in the container 14 by the

guide rollers

15 and 16 provided in the container 14, the thermosetting synthesis is performed on the surface of the reinforcing substrate 10. A resin varnish 13 is applied. Subsequently, the reinforcing base material 10 coated with the thermosetting synthetic resin varnish 13 is sent to the compression rolls 18 and 19 by the feed roller 17, and is applied to the surface of the reinforcing base material 10 by the compression rolls 18 and 19. The curable synthetic resin varnish 13 is impregnated into the fiber structure gap. And the reaction of resin is advanced at the same time that the solvent is blown off in the drying furnace 20 to the reinforcing base material 10 impregnated with the thermosetting synthetic resin varnish 13, and thereby a prepreg (resin processing base material) that can be molded. 21 is produced. The prepreg 21 thus obtained is cut into a desired size as shown in FIG. 6 and a plurality of the prepregs 21 are laminated to form a laminate, and then compression-molded in the laminating direction to reinforce the fiber woven fabric. A substrate 2 made of resin is produced.
[0041]
As the fiber woven fabric used for the substrate 2, a cotton fabric, a glass fiber fabric, a carbon fiber fabric or the like is suitable. In addition, as the thermosetting synthetic resin, phenol resin, epoxy resin, unsaturated polyester resin and the like are suitable. As the volatile solvent of these thermosetting synthetic resins, thermosetting using methanol, acetone, methyl ethyl ketone and the like. It is appropriately selected depending on the synthetic resin. The solid content of the thermosetting synthetic resin varnish formed by dissolving the thermosetting synthetic resin in a volatile solvent is approximately 30 to 65% by weight, and the viscosity of the resin varnish is approximately 800 to 5000 cP. 1000 to 4000 cP is preferred.
[0042]
The surface layer material 4 is produced by the same manufacturing method using a manufacturing apparatus similar to the manufacturing apparatus shown in FIG. That is, the woven fabric 22 made of organic fibers or inorganic fibers wound around the uncoiler 9 is sent by the feed roller 11 to the container 14 in which the mixed liquid 23 of the tetrafluoroethylene resin powder and the thermosetting synthetic resin varnish is stored. The liquid mixture 23 is applied to the surface of the woven fabric 22 by being passed through the liquid mixture 23 stored in the container 14 by the

guide rollers

15 and 16 provided in the container 14. Next, the woven fabric 22 coated with the mixed solution 23 is fed to the compression rolls 18 and 19 by the feed roller 17, and is applied to the surface of the woven fabric 22 by the compression rolls 18 and 19. It is impregnated up to. The woven fabric 22 impregnated with the mixed solution 23 is subjected to the reaction of the resin at the same time as the solvent is blown in the drying furnace 20, thereby forming a moldable prepreg (resin processing substrate) 24. . The prepreg 24 thus obtained is cut into a desired dimension as shown in FIG. 6, and a plurality of the prepregs 24 are stacked to be stacked, and then compression molded in the stacking direction to produce the surface layer material 4.
[0043]
As the woven fabric used for the surface layer material 4, a woven fabric made of organic fibers such as cotton fibers and aramid fibers or a woven fabric made of inorganic fibers such as carbon fibers is preferable. In particular, when an aramid fiber is used as the organic fiber, a copolyparaphenylene • 3,4′oxydiphenylene • terephthalamide fiber is preferable. The woven fabric texture of these fibers is not particularly limited, and may be any of plain weave, oblique weave, satin weave and the like.
[0044]
As the thermosetting synthetic resin, phenol resin, epoxy resin, unsaturated polyester resin and the like are suitable, and as the volatile solvent of these thermosetting synthetic resins, thermosetting synthetic resins such as methanol, acetone, methyl ethyl ketone and the like are used. Is appropriately selected.
[0045]
As the tetrafluoroethylene resin, powder for molding or solid lubrication is used, but for solid lubrication from the viewpoint of uniform dispersibility in the thermosetting synthetic resin by mixing with the thermosetting synthetic resin. The average particle size is about 1 to 50 μm, preferably 1 to 30 μm. Specific examples of such an ethylene tetrafluoride resin include “Teflon 7J, TLP-10 (trade name)” manufactured by Mitsui DuPont Fluoro Chemical Co., “Fluon G163 (trade name)” manufactured by Asahi Glass Co., Ltd., Daikin Industries, Ltd. “Polyflon M15, Lubron L5 (all are trade names)” manufactured by Kitamura, and “KTL610, KTL350, KTL8N (all are trade names)” manufactured by Kitamura Co., Ltd., and the like.
[0046]
And the ratio of the woven fabric which forms the surface material 4, the thermosetting synthetic resin, and the tetrafluoroethylene resin is 25 to 35% by weight of the woven fabric, 30 to 45% by weight of the thermosetting synthetic resin, and ethylene tetrafluoride. 30 to 45% by weight of the resin is a preferable range. In this ratio, the blending ratio of the thermosetting synthetic resin impregnated on the woven fabric and the ethylene tetrafluoride resin is determined from the viewpoint of the frictional wear characteristics as the surface layer material 4. When the blending ratio of the thermosetting synthetic resin is less than 30% by weight, the bonding strength as the surface layer material 4 is not sufficient, and at the same time when blending exceeding 45% by weight, the low friction property of the ethylene tetrafluoride resin blended is impaired. There is a risk. The tetrafluoroethylene resin imparts low friction to the surface layer material, but if the blending ratio is less than 25% by weight, it is difficult to impart sufficient low friction to the surface layer material, and exceeds 35% by weight. When it mix | blends, there exists a possibility of reducing the joining property which a thermosetting synthetic resin has, and causing peeling of a surface layer material as a result.
[0047]
The surface layer material 4 may be integrally bonded to the one surface 3 of the base 2 with an adhesive, but the prepreg 21 forming the base 2 is cut into a desired dimension, and a plurality of stacked layers are laminated. A plurality of prepregs 24 forming the surface layer material 4 are superposed on one surface of the body, heated and pressed in the laminating direction, and integrally bonded together with the curing of both thermosetting synthetic resins of the

prepregs

21 and 24. It is preferable.
[0048]
Thus, the surface layer material 4 integrally bonded onto the one surface 3 of the base 2 is formed with a plurality of recesses 5 that are recessed in the stacking direction (thickness direction). In order to remove the resin layer containing the thermosetting synthetic resin and the tetrafluoroethylene resin adhering to the surface, the surface of the surface material 4 is lapped with a lint 7 of woven fabric. Form.
[0049]
The plurality of recesses 5 formed in the surface layer material 4 are formed so that the total area of the openings of the recesses 5 occupying the surface area of the surface layer material 4 is 20 to 30%. The recess 5 is filled and held with a lubricating composition to be described later. In order to satisfactorily exhibit the frictional properties such as low friction of the lubricating composition, the recess 5 occupies the surface area of the surface material 4. At least 20% of the total area of the openings is required. However, if the total area of the openings of the recesses 5 occupying the surface area of the surface layer material 4 exceeds 30%, the strength of the surface layer material 4 is reduced.
[0050]
The recess 5 may be formed by drilling using a drill or the like, but may also be formed by pressing together with the curing of both the thermosetting synthetic resins of the

prepregs

21 and 24.
[0051]
The fluff 7 produced by polishing the surface of the surface layer material 4 bites into the coating layer 8 when the lubricating composition described later is coated on the surface of the surface layer material 4, thereby the surface of the surface layer material 4 and the coating layer 8 of the lubricating composition. The bond strength with is increased.
[0052]
The lubricating composition to be filled and coated on the surface of the plurality of recesses 5 formed on the surface material 4 and the surface material 4 is 50 to 65% by weight of lead, 10 to 20% by weight of tetrafluoroethylene resin, and 15 to 30% of wax. % By weight.
[0053]
The lead is preferably an atomized lead powder, the particle shape of which is almost granular, and is preferably a powder that passes 200 mesh, preferably 250 mesh, with a Japanese Industrial Standard Standard sieve. Unlike the stamped (pulverized) lead powder whose particle shape is indefinite, this atomized lead powder has a large apparent density and a very small cohesiveness of the powder in the same particle size distribution. For example, in stamped lead powder that passes 90% or more through 250 mesh, the apparent density is 1.9 to 2.4 g / cm.³In contrast, the atomized lead powder has 5.2 to 5.8 g / cm in the same particle size distribution.³It is. This atomized lead powder has excellent mixing properties with other components, can provide a homogeneous dispersion, has excellent powder flowability after being made into a mixture, and has a tendency to oxidize when heated. It has characteristics such as being extremely small.
[0054]
Lead has a very low coefficient of friction under high load conditions, is excellent in the ability to form a film, and is also excellent in self-repairability of the film, so it is compatible with ethylene tetrafluoride resin and wax in the lubricating composition. It exhibits low friction and wear resistance under a wide range of conditions. And if the blending ratio of lead is less than 50% by weight, the ratio in the lubricating composition becomes too low, and the properties possessed by lead such as the low friction mentioned above are not fully exhibited, and the blending exceeds 65% by weight. Then, there exists a possibility of reducing the role of the wax which plays the role as a binder mentioned later. Therefore, 45 to 65% by weight of lead is appropriate.
[0055]
As for the tetrafluoroethylene resin, a powder for molding or solid lubrication is used in the same manner as the above-mentioned tetrafluoroethylene resin. In particular, the tetrafluoroethylene resin powder for molding, specifically Mitsui Dupont Fluorochemical, is used. “Teflon 7J (trade name)” manufactured by the company can be mentioned. The tetrafluoroethylene resin is in the lubricating composition and contributes to low friction as in the case of lead. When the blending ratio is less than 10% by weight, the low friction is not sufficiently exhibited, and 20% by weight. When it mixes exceeding%, there exists a possibility of reducing the role as a binder of wax like the said lead. Accordingly, the blending ratio of the tetrafluoroethylene resin is suitably 10 to 20% by weight.
[0056]
As the wax, a hydrocarbon wax such as a paraffin wax having approximately 24 or more carbon atoms, an olefin wax having approximately 26 or more carbon atoms, an alkylbenzene having approximately 28 or more carbon atoms, and a crystalline microcrystalline wax is used. In particular, paraffinic wax having about 24 or more carbon atoms, specifically, “Godes Wax (trade name)” manufactured by Nikko Fine Products can be mentioned as a preferable one. The wax is present in the lubricating composition and serves as a binder and also contributes to low friction. If the blending ratio is less than 15% by weight, the wax cannot sufficiently function as a binder. If the blending amount exceeds 5% by weight, it tends to flow under the influence of frictional heat at the time of sliding, resulting in weakening the bonding force with the surface of the surface layer material. Accordingly, the blending ratio of the wax is suitably 15 to 30% by weight.
[0057]
In the lubricating composition comprising the above lead powder, ethylene tetrafluoride resin powder and wax, a part of the wax can be replaced with a higher fatty acid salt. This higher fatty acid salt exhibits the effect of improving the moldability of the lubricating composition. The higher fatty acid salt is selected from alkali and alkaline earth metal stearates such as lithium (Li), barium (Ba) and calcium (Ca). And the mixing ratio of the higher fatty acid salt is suitably 5 to 15% by weight.
[0058]
The lubricating composition having the above-described component composition is filled and coated on the surface of the surface layer material 4 as follows. The substrate 2 and the surface layer material 4 integrally bonded to one surface of the substrate 2 and formed with the plurality of recesses 5 and the fluff 7 of the woven fabric are previously brought to a temperature near the melting point of the wax in the lubricating composition. After heating, the lubricating composition is uniformly sprayed on the surface of the surface layer material 4. Next, the base material 2, the surface layer material 4, and the lubricating composition are compression-molded in the thickness direction, so that the lubricating composition uniformly distributed on the surface of the surface layer material 4 flows and fills the recesses 5. At the same time, the covering layer 8 is formed through the fluff 7 of the woven fabric formed on the surface of the surface layer material 4. As the fluff 7 of the woven fabric bites into the covering layer 8, the bonding force between the covering layer 8 and the surface of the surface layer material 4 is enhanced.
[0059]
In this way, the base 2 made of the fiber woven cloth reinforced thermosetting synthetic resin, the surface layer material 4 integrally bonded to the one surface 3 of the base 2, and the plurality of layers formed on the surface layer material 4 A coating layer 8 made of a lubricating composition coated on the surface 6 of the surface layer material 4 through the fluff 7 formed on the surface 6 of the surface layer material 4 and filled in the recess 5 of the surface layer material 4. A sliding member 1 comprising:
[0060]
A slip isolation device using the slip member 1 is shown in FIG. In FIG. 7, the sliding member 1 is fixed to an upper structure G such as a building, a bridge, and an elevated road, and a sliding plate 25 is fixed to the lower structure B such as a foundation. And a surface of the surface layer material 4 of the sliding member 1 and a plurality of recesses 5 on the surface, and a surface of the surface layer material 4 slidingly covered with a coating layer 8 of a lubricating composition filled and covered with fluff 7 of woven fabric. It is a surface.
[0061]
As the sliding plate 25, a stainless steel plate (SUS403) or a stainless steel plate and a sliding plate having a coating layer 26 on one surface thereof are used.
[0062]
A method for forming a coating layer on one surface of a stainless steel plate will be described. After blending 25 to 75% by weight of ethylene tetrafluoride resin powder to the polyamideimide resin powder to form a mixture, the mixture is dissolved in an organic solvent to prepare a solution having a solid content of 30 to 40% by weight. A coated film is formed on a stainless steel plate that has been subjected to commonly used treatments such as shot blasting and degreasing by means of brushing or spraying, and a cured treatment is performed to obtain a cured coating film. Curing after the formation of the coating film is carried out by natural drying after coating film formation, or by pre-drying in a hot air drying furnace for about 30 minutes to dissipate the solvent and then baking at 230 ° C. for about 30 minutes. The coating layer 26 thus obtained has a thickness of approximately 20 to 25 μm.
[0063]
The sliding plate 25 having the coating layer 26 slides in the concave layer 5 of the surface layer material 4 of the sliding member 1 and the coating layer 8 and the coating layer 26 that are filled and coated on the surface of the surface layer material 4. Because it is demonstrated and sliding out quickly regardless of the magnitude of the seismic force, a sufficient seismic isolation function can be exhibited even from a large seismic force to a small seismic force.
[0064]
【Example】
Next, the present invention will be described in detail based on examples. In addition, this invention is not limited to these Examples at all.
[0065]
[Production of sliding plate]
A stainless steel plate (SUS304) having a width of 62 mm and a length of 178 mm was prepared, and one surface of the steel plate was roughened by shot blasting and degreased. As a tetrafluoroethylene resin powder, a solution having a solid content of 30% by weight obtained by dissolving a polyamideimide resin powder containing 35% by weight of “Lublon L5” manufactured by Daikin Industries, Ltd. in an organic solvent is used as a rough surface of the steel sheet. A coating film is formed on the converted surface by spraying means, preliminarily dried in a hot air drying furnace for 30 minutes to dissipate the solvent, and then baked at 230 ° C. for 30 minutes to form a 23 μm thick coating layer This was used as a sliding plate.
[0066]
[Preparation of substrate]
A plain woven cotton cloth is prepared as a reinforcing fiber cloth, and the cotton cloth is passed by a feed roll through a container storing a phenol resin varnish having a resin solid content of 64.5% by weight, and the resin varnish is applied to the surface of the cotton cloth. Then, it was coated on the surface of the cotton cloth by a compression roll and impregnated with the resin varnish to the gap between the fiber structures, and then the solvent was blown away in the drying furnace and the reaction of the resin was advanced to obtain a prepreg (resin-processed cotton cloth). This prepreg was cut into a circular shape with a diameter of 30 mm, and five of them were overlapped.
[0067]
[Production of surface material]
As the woven fabric, prepare an aramid fiber woven fabric with plain weave of copolyparaphenylene 3,4'oxydiphenylene terephthalamide fiber (“Technola (trade name)” manufactured by Teijin Limited), and send the aramid fiber woven fabric A roll is passed through a container containing a mixed resin varnish of an epoxy resin and an ethylene tetrafluoride resin ("Lublon L5 (trade name)" manufactured by Daikin Industries, Ltd.) to the surface of the aramid fiber woven fabric. After coating the mixed resin varnish and applying it to the surface of the aramid fiber woven fabric with a compression roll and impregnating the mixed resin varnish into the fiber structure gap, the solvent reaction is carried out at the same time in the drying furnace, and the reaction of the resin proceeds. A prepreg (resin-processed aramid fiber woven fabric) composed of 30% by weight aramid fiber woven fabric, 39% by weight epoxy resin and 31% by weight ethylene tetrafluoride resin was obtained. This prepreg was cut into a circular shape with a diameter of 60 mm, and three of them were overlapped.
[0068]
Three prepregs (resin-processed aramid fiber woven fabric) are placed on the five prepregs (resin-processed cotton cloth), and the molding pressure is 70 kg / cm in the thickness direction.²Then, compression molding was performed under conditions of a molding temperature of 160 ° C. and a molding time of 10 minutes to obtain a laminate (substrate thickness 7.5 mm, surface layer material thickness 3 mm) in which the substrate and the surface material were joined together.
[0069]
Twelve circular recesses having a diameter of 8 mm and a depth of 3 mm are formed on the surface material of this laminate (the total area of the openings of the recesses occupying the surface area of the surface material is 21%) and formed on the surface of the surface material The resin layer thus formed was removed by polishing, and fuzz due to polishing was formed on the surface of the surface layer material.
[0070]
[Production of Lubricating Composition (1)]
50 to 65% by weight of atomized lead powder passing through 250 mesh, 10 to 20% by weight of “Teflon 7J (trade name)” manufactured by Mitsui DuPont Fluorochemical Co. as an ethylene tetrafluoride resin powder, and Nikko Fine Products “Godes wax (trade name)” 15 to 30% by weight was mixed with stirring to prepare a lubricating composition (1).
[0071]
[Preparation of Lubricating Composition (2)]
50 to 65% by weight of atomized lead powder passing through 250 mesh, 10 to 20% by weight of “Teflon 7J (trade name)” manufactured by Mitsui DuPont Fluorochemical Co. as an ethylene tetrafluoride resin powder, and Nikko Fine Products A lubricating composition (2) was prepared by stirring and mixing 15 to 25% by weight of “Godes Wax (trade name)” manufactured by Lithium and 5 to 15% by weight of lithium stearate as a higher fatty acid salt.
[0072]
Examples 1-3
The laminate having fluff formed on the surface of the surface material is preheated to a temperature of 60 ° C., which is the melting point of the wax in the lubricating composition (1), and then the lubricating composition (1) is formed on the surface of the surface material. Is uniformly sprayed with the component composition shown in Table 1, and then compression-molded in the thickness direction to fill the circular recess with the lubricating composition (1) and to the surface of the surface layer material through fuzz on the surface. A coating layer made of the lubricating composition (1) was formed.
[0073]
[Table 1]

[0074]
Examples 4-6
After forming 13 circular recesses in the surface layer material and fuzzing the surface of the surface layer material, the laminate was previously heated to a temperature of 60 ° C., which is the melting point of the wax in the lubricating composition (2). The lubricating composition (2) is uniformly sprayed on the surface of the surface layer material with the component composition shown in Table 2, and then compression-molded in the thickness direction to fill the circular recesses with the lubricating composition (2). In addition, a coating layer made of the lubricating composition (2) was formed on the surface of the surface layer material through fluffing on the surface.
[0075]
[Table 2]

[0076]
Comparative example
Three prepregs comprising 30% by weight of aramid fiber woven fabric, 39% by weight of epoxy resin and 31% by weight of ethylene tetrafluoride resin are placed on five prepregs obtained by impregnating and applying a phenolic resin varnish to a plain woven cotton fabric. Was formed by compression molding, and a laminated body in which the substrate and the surface layer material were integrally joined was used as a sliding member.
[0077]
Next, the friction performance was tested under the

test conditions

1 and 2 shown below for the slide members of Examples 1 to 6 and the slide member made of the comparative example.
[0078]
<Test condition 1>
Surface pressure 14.7MPa
Excitation speed 1kine 20kine
Uses the above sliding plate
Test method A sliding plate is fixed on a table of a biaxial testing machine with the covering layer facing upward, and the surface layer material of the sliding member is slidably brought into contact with the covering layer of the sliding plate, and a surface pressure is applied to the sliding member. A load was applied so as to be 14.7 MPa, and a synthetic wave shown in FIG. 8 was supplied to the sliding plate side, and vibration (amplitude ± 65 mm) was continuously performed five times with the synthetic wave.
[0079]
<Test condition 2>
Surface pressure 29.4 MPa
Excitation speed 1kine 20kine
Uses the above sliding plate
Test method A sliding plate is fixed on a table of a biaxial testing machine with the covering layer facing upward, and the surface layer material of the sliding member is slidably brought into contact with the covering layer of the sliding plate, and a surface pressure is applied to the sliding member. A load was applied so as to be 29.4 MPa, and the synthetic wave shown in FIG. 8 was supplied to the sliding plate side in the same manner as in the test condition 1, and vibration was continuously performed five times with the synthetic wave.
[0080]
Tables 3 (test condition 1) and 4 (test) show the friction coefficients at the excitation speed of 1 kine and the excitation speed of 20 kine of the sliding members of Examples 1 to 6 and the comparative example performed under the above test condition 1 and test condition 2. Shown in Condition 2).
[0081]
[Table 3]

[0082]
[Table 4]

[0083]
From the above test results, in the combination of the sliding member and the sliding plate of Examples 1 to 6, the friction coefficient is as low as 0.05 or less under the condition that the surface pressure is 14.7 MPa and the excitation speed is 1 kine and 20 kine. In particular, when the surface pressure was 29.4 MPa and the excitation speed was 1 kine and 20 kine, the action of the lead component in the lubricating composition was exhibited, and the friction coefficient was as low as 0.04 or less.
[0084]
When these results are applied to a slip isolation device, the friction coefficient in the combination of the slip member and the slip plate is 0.05 or less, and the seismic isolation cycle is lengthened while keeping the acceleration of slippage small. Is possible. Moreover, the design freedom of the slip isolation device can be greatly increased.
[0085]
【The invention's effect】
According to the present invention, it is possible to provide a sliding member capable of exhibiting a sufficient seismic isolation function even from a large seismic force to a small seismic force, a manufacturing method of the sliding member, and a sliding seismic isolation device using the sliding member. . In the sliding seismic isolation device using the sliding member of the present invention, since the friction coefficient shows a low value of 0.05 or less, it is possible to make the seismic isolation cycle longer while keeping the acceleration of slipping small. Therefore, the design freedom of the slip isolation device can be greatly increased.
[Brief description of the drawings]
FIG. 1 is a plan view of a sliding member of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is an enlarged cross-sectional view of a main part of FIG.
FIG. 4 is a plan view of another example of the sliding member of the present invention.
FIG. 5 is an explanatory diagram showing a manufacturing process.
FIG. 6 is a perspective view showing a laminated state of prepregs.
FIG. 7 is an explanatory view showing a slip isolation device.
FIG. 8 is a graph showing a synthetic wave used in the test.
[Explanation of symbols]
1 Sliding material
2 Base material
4 Surface material
5 recess
7 Fluff
8 Coating layer
25 Sliding plate

Claims

A surface layer material made of organic fibers or inorganic fibers and formed by laminating and joining a plurality of woven fabrics filled with a mixture of tetrafluoroethylene resin and thermosetting synthetic resin in the fiber structure gap is a fiber. It is integrally bonded to the surface of a substrate made of a woven cloth reinforced thermosetting synthetic resin, and at least one concave portion is formed in the surface layer material, and fluff of the woven fabric is formed on the surface layer surface The concave portion is filled with a lubricating composition comprising at least lead, tetratetrafluoroethylene resin, and wax, and a coating layer of the lubricating composition is provided on the surface of the surface material through fuzz. A sliding member characterized by being formed.

The surface layer material includes 25 to 35% by weight of a woven fabric made of organic fiber or inorganic fiber, 30 to 45% by weight of thermosetting synthetic resin, and 25 to 35% by weight of ethylene tetrafluoride resin. Sliding member.

The sliding member according to claim 1 or 2, wherein the organic fibers include at least one of cotton fibers and aramid fibers.

The sliding member according to claim 1 or 2, wherein the inorganic fibers include carbon fibers.

The sliding member according to any one of claims 1 to 4, wherein the thermosetting synthetic resin includes at least one of an epoxy resin, a phenol resin, and an unsaturated polyester resin.

The sliding member according to any one of claims 1 to 5, wherein the recess includes at least one of a cylindrical recess and a recess made of two rectangular long grooves orthogonal to each other.

The sliding member according to any one of claims 1 to 6, wherein a plurality of concave portions are formed in the surface layer material.

The sliding member according to any one of claims 1 to 7, wherein the lubricating composition contains 50 to 65% by weight of lead, 10 to 20% by weight of ethylene tetrafluoride resin, and 15 to 30% by weight of wax.

The wax contains a hydrocarbon wax such as a paraffinic wax having approximately 24 or more carbon atoms, an olefinic wax having approximately 26 or more carbon atoms, an alkylbenzene having approximately 28 or more carbon atoms, and a crystalline microcrystalline wax. Item 9. The sliding member according to any one of Items 1 to 8.

The sliding member according to claim 8 or 9, wherein the lubricating composition further contains 5 to 15% by weight of a higher fatty acid salt.

A step of forming a surface layer material by superposing a plurality of prepregs obtained by applying a thermosetting synthetic resin varnish dispersed and containing a tetrafluoroethylene resin to a woven fabric made of organic fibers or inorganic fibers by roll molding;
A substrate made of a fiber woven fabric reinforced thermosetting synthetic resin is prepared, and the surface layer material is placed on the surface of the substrate, and the surface layer material and the substrate are heated and pressed to form a surface layer material on the surface of the substrate. Joining together,
Forming at least one recess in the surface layer material and polishing the surface of the surface layer material to form fluff of woven fabric on the surface of the surface layer material;
A step of heating the base body and the surface layer material to a predetermined temperature, and then uniformly spraying a lubricating composition comprising at least lead, tetrafluoroethylene resin and wax on the surface of the surface layer material;
The base material, the surface layer material, and the lubricating composition are compression-molded, the concave portion of the surface layer material is filled with the lubricating composition, and the surface of the surface layer material is coated with a coating layer of the lubricating composition via fuzz of a woven fabric Forming, and
The manufacturing method of the sliding member as described in any one of Claim 1 to 10 containing these.

A sliding seismic isolation device disposed between an upper structure and a lower structure, wherein the sliding plate is fixed to one of the upper structure and the lower structure, and the upper structure. The sliding member according to any one of claims 1 to 10, wherein the sliding member is fixed to any one of the structure and the lower structure, and slidably contacts the sliding plate in the coating layer. Seismic isolation device.

The sliding plate has a polyamideimide resin coating layer containing ethylene tetrafluoride resin on its surface, and the sliding member is slidable on the sliding plate via the polyamideimide resin coating layer in the coating layer. The seismic isolation device according to claim 12, wherein the seismic isolation device is in contact with the base.