JP3981592B2

JP3981592B2 - Anti-vibration member mounting method, anti-vibration member mounting apparatus, and anti-vibration member

Info

Publication number: JP3981592B2
Application number: JP2002173634A
Authority: JP
Inventors: 幸一鳥山; 幹男角井; 力也松尾; 博杉村; 雅遊亀坂元; 雅則松本
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2002-06-14
Filing date: 2002-06-14
Publication date: 2007-09-26
Anticipated expiration: 2022-06-14
Also published as: JP2004020761A

Description

【０００１】
【発明の属する技術分野】
本発明は、電子写真感光体ドラムの防振部材に関し、詳しくは、中空円筒基体の表面に感光層を有する電子写真感光体ドラムの内壁面に対するシート状の防振部材の装着方法、防振部材装着装置及び防振部材に関する。
【０００２】
【従来の技術】
複写機，プリンタ，ファクシミリ等の電子写真装置には、回転しながら潜像を形成する感光体ドラムが用いられている。
この感光体ドラムは、例えば、感光体支持体としてアルミニウム製ドラムを使用し、感光体を蒸着または塗工したものである。
【０００３】
この感光体ドラムは、電子写真装置の小型化，軽量化に伴い、小径支持体、薄肉支持体が求められるようになってきている。
【０００４】
従来、電子写真感光体ドラムは、クリーニングブレードを感光体表面に圧接してクリーニングする場合に、共鳴音を発生したり、あるいは接触帯電器との共鳴によって異音を発生する場合があり、近年では、上記の小型化傾向、薄肉化傾向の支持体により、感光体ドラムの異音の問題はその発生頻度を増し、年々重要視されるようになってきた。
【０００５】
クリーニングブレードと感光体ドラムとの摩擦による共鳴音としては、主に高温高湿環境下における、連続使用時に発生する異音が知られている。
また、接触帯電器と感光体ドラムとの共鳴音としては、接触帯電器に加える交流電圧の周波数に依存する異音が知られている。
【０００６】
感光体ドラムの異音防止対策として、何らかの充填体を電子写真感光体ドラムの中空円筒基体の内部に挿入・固着することが行われている。
【０００７】
充填体の形状としては、バネと組み合わせた構造物（実開昭６２−１２７５６７号公報、特開平１１−３０５５９８号公報参照）、スパイラル状（特開平８−６２８７８号公報参照）、円柱型（特開２０００−８９６１２号公報参照）等が提案されている。
【０００８】
充填体の材質としては、多孔質の弾性体（特開昭６３−６０４８１号公報参照）、特定のＪＩＳ硬度を有した重り部材（特開平５−３５１６６号公報参照）、発泡ポリウレタン（特開昭６３−２７１３８８号公報参照）、粘弾性材料（特許第２９１３６８９号公報参照）、線膨張係数を規定した充填体（特許第３２５９５５４号公報参照）等が提案されている。
【０００９】
さらに、その充填体の挿入方法に関しては、スリットを有する円筒状の充填体について特開２００１−３０５９０８号公報に提案されている。
しかし、シート状の充填体の挿入方法及び挿入装置についての提案はない。
【００１０】
そこで、感光体ドラムの中空円筒基体の内部にシート状の防振部材を挿入する挿入方法及び挿入装置を提供することが要望されていた。
【００１１】
【発明が解決しようとする課題】
ところが、シート状の防振部材は、スリットを有する円筒状の防振部材などの他の防振部材に比べて、材料費が安価であるが、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に挿入・密着することが困難であり、作業性に問題があったため、実使用上問題があった。
【００１２】
防振部材を感光体ドラムの中空円筒基体の内部に人の手作業で挿入する場合、感光体表面を手で握らないと、防振部材を感光体ドラムの中空円筒基体の内部に入れ難く、そうすると感光体表面の欠品や損傷も避けられない。
【００１３】
また、防振部材を感光体ドラムの中空円筒基体の内部に挿入した後、防振部材が感光体ドラムの中空円筒基体の内部で移動しないようにするために、防振部材を感光体ドラムの内壁面に接着剤で固定するか、あるいは防振部材の表面のすべり性を悪くする必要がある。
そのようにすると、さらに防振部材の感光体ドラムの中空円筒基体の内部への挿入が困難となる。
また、防振部材の挿入性の悪さから、うっかりミスによる欠品や損傷も避けられない。
さらに、防振部材を感光体ドラムの内壁面に接着剤で固定した場合、リサイクル時に、防振部材の感光体ドラムからの取り外しが困難である。
【００１４】
そこで、本発明の目的は、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に簡易且つ確実に挿入・密着させて装着することが可能な防振部材の装着方法、防振部材装着装置及び防振部材を提供することにある。
【００１５】
【課題を解決するための手段】
上記目的を達成するために、本発明の防振部材の装着方法は、中空円筒基体の表面に感光層を有する電子写真感光体ドラムの内壁面に、シート状の防振部材を装着する方法であって、前記シート状の防振部材を、エアー吸引部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー吸引を停止することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着することを特徴とするものである。
本発明の防振部材の装着方法によれば、シート状の防振部材を、エアー吸引部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー吸引を停止することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着する方法を用いることにより、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に簡単に挿入・密着させて装着することができる。
【００１６】
本発明の防振部材の装着方法は、中空円筒基体の表面に感光層を有する電子写真感光体ドラムの内壁面に、シート状の防振部材を装着する方法であって、前記シート状の防振部材を、エアー吸引部及びエアー排出部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー吸引の停止に加えてエアー排出することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着することを特徴とするものである。
本発明の防振部材の装着方法によれば、シート状の防振部材を、エアー吸引部及びエアー排出部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー吸引の停止に加えてエアー排出することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着する方法を用いることにより、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に簡易且つ確実に挿入・密着させて装着することができる。
【００１７】
本発明の防振部材の装着方法は、前記シート状の防振部材をエアー吸引する前記シャフトに位置決めして保持した後、前記シャフトに保持された前記シート状の防振部材の端部に向けて前記感光体ドラムの中空円筒基体の端部開口を接近させ、前記感光体ドラムの中空円筒基体内部の所定位置まで前記シート状の防振部材を挿入するようになっている。
本発明の防振部材の装着方法によれば、シート状の防振部材をエアー吸引するシャフトに位置決めして保持した後、シャフトに保持されたシート状の防振部材の端部に向けて感光体ドラムの中空円筒基体の端部開口を接近させ、感光体ドラムの中空円筒基体の内部にシート状の防振部材を挿入する方法を用いることにより、装着の困難なシート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入をより確実に行うことができる。
【００１８】
本発明の防振部材装着装置は、中空円筒基体の表面に感光層を有する電子写真感光体ドラムの内壁面に、シート状の防振部材を装着する装置であって、前記シート状の防振部材を保持するエアー吸引部を有するシャフトと、前記シート状の防振部材を前記シャフト上の所定の位置に位置決めする位置決め手段と前記エアー吸引部を介してエアー吸引することで前記シート状の防振部材を前記シャフト上に位置決め保持すると共に、エアー吸引を停止することで前記保持を解除するようにしたエアー吸引手段と、前記シート状の防振部材をエアー吸引する前記シャフトに位置決めして保持した後、前記シャフトに保持された前記シート状の防振部材の端部に向けて前記感光体ドラムの中空円筒基体の端部開口を接近させ、前記感光体ドラムの中空円筒基体内部の所定位置まで前記シート状の防振部材を挿入するように動作する防振部材挿入手段とを備えたことを特徴とする構成を有するものである。
本発明の防振部材装着装置によれば、シート状の防振部材を保持するエアー吸引部を有するシャフトと、シート状の防振部材をシャフトに位置決めする位置決め手段とを備えた装置を用いることにより、シート状の防振部材をシャフトに巻き付けるのみで、シャフトのエアー吸引部がシート状の防振部材をエアー吸引するので、シート状の防振部材をシャフトにエアー吸引で保持することができ、位置決め手段がシート状の防振部材をシャフトに位置決めするので、装着の困難なシート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に挿入・密着して装着することができる。
【００１９】
本発明の防振部材装着装置における前記防振部材挿入手段は、前記シャフトに保持された前記シート状の防振部材の端部に向けて前記感光体ドラムを把持して該感光体ドラムの中空円筒基体の端部開口を接近させ、前記感光体ドラムの中空円筒基体の内部に前記シート状の防振部材を挿入するように動作する感光体ドラム搬送ロボットであることを特徴とする。
本発明の防振部材装着装置によれば、シャフトに保持されたシート状の防振部材の端部に向けて感光体ドラムを把持して感光体ドラムの中空円筒基体の端部開口を接近させ、感光体ドラムの中空円筒基体の内部にシート状の防振部材を挿入する感光体ドラム搬送ロボットを備えていることで、感光体ドラム搬送ロボットがシート状の防振部材を感光体ドラムの中空円筒基体の内部に挿入するので、感光体ドラム搬送ロボットを使用して、シート状の防振部材を感光体ドラムの中空円筒基体の内部に挿入する装着作業を自動化することができ、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、装着の困難なシート状の防振部材の感光体ドラムの中空円筒基体の内部への装着作業を大幅に効率化することができる。
【００２０】
本発明の防振部材装着装置は、前記シート状の防振部材の前記シャフトへの保持を確認する防振部材装着確認手段と、前記シート状の防振部材の前記感光体ドラムの中空円筒基体の内部への挿入を確認する防振部材挿入確認手段とを備えており、前記防振部材装着確認手段が防振部材確認センサであり、前記防振部材挿入確認手段が感光体ドラム確認センサであることを特徴とする。
本発明の防振部材装着装置によれば、シート状の防振部材のシャフトへの保持を確認する防振部材装着確認手段と、シート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入を確認する防振部材挿入確認手段とを備えていることで、防振部材装着確認手段がシート状の防振部材のシャフトへの保持を確認し、防振部材挿入確認手段がシート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入を確認するので、シート状の防振部材の感光体ドラムの中空円筒基体の内部への装着をより確実に行うことができる。
【００２１】
本発明の防振部材装着装置は、感光体ドラムの中空円筒基体の内径ｒ（ｍｍ）、シート状の防振部材の感光体ドラム装着時の周方向長さｂ（ｍｍ）、シート状の防振部材の厚さｍ（ｍｍ）、シャフトの外径ｄ（ｍｍ）が、下記式［１］，［２］を満たす範囲にあることが好ましい。
ｒ−（ｄ＋２×ｍ）≧１［１］
π×ｒ／２≦ｂ［２］
本発明の防振部材装着装置によれば、感光体ドラムの中空円筒基体の内径ｒ（ｍｍ）、シート状の防振部材の感光体ドラム装着時の周方向長さｂ（ｍｍ）、シート状の防振部材の厚さｍ（ｍｍ）、シャフトの外径ｄ（ｍｍ）が、上記式［１］，［２］を満たす範囲にあることで、シート状の防振部材をシャフトに保持した状態で、感光体ドラムの中空円筒基体の内径とシート状の防振部材との間に１ｍｍ以上の隙間を持つようになり、シート状の防振部材を感光体ドラムの中空円筒基体の内部にスムーズに挿入することができ、シート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入後は、シート状の防振部材が感光体ドラムの中空円筒基体の内部で移動することがなくなる。
【００２２】
本発明の防振部材の装着方法の実施に直接使用する防振部材は、２５％圧縮荷重が１ｋｇ／ｃｍ^２以下であるシート状の粘弾性材料よりなることを特徴とするものである。
本発明の防振部材によれば、２５％圧縮荷重が１ｋｇ／ｃｍ^２以下であるシート状の粘弾性材料を用いることにより、防振部材が適度な柔軟性を有するので、防振部材のシャフトへの装着時、リサイクル時の作業性が向上し、従来のスリットを有する円筒状の防振部材などの他の防振部材に比べて、材料費が安価であり、良好な生産性が確保できる。
【００２３】
【発明の実施の形態】
以下に、本発明の一実施の形態を、図面を参照して詳細に説明する。
図１は本発明の一実施の形態に係わる防振部材の装着方法を示す原理図、（ａ）はシート状の防振部材の感光体ドラムの内部への挿入前を示す図、（ｂ）はシート状の防振部材の感光体ドラムの内部への挿入時を示す図、（ｃ）はシート状の防振部材の感光体ドラムの内部への挿入後を示す図である。
図２は本発明の一実施の形態に係わる防振部材装着装置を示す概略図である。
図３は本発明の一実施の形態に係わるシート状の防振部材の一例を示す斜視図、図４は本発明の電子写真感光体ドラムの一例を示す斜視図、図５は本発明のシート状の防振部材を内蔵された電子写真感光体ドラムへのフランジの装着前の状態を示す斜視図である。
【００２４】
図１乃至図５において、１は中空円筒基体１３の表面に感光層を有する導電性支持体ドラムよりなる感光体ドラム、２は感光体ドラム１の中空円筒基体１３の内部に装着されるシート状の防振部材、３はシート状の防振部材２を巻き付けて保持するためのシャフト、４はシート状の防振部材２をシャフト３に位置決めするための位置決め具、５はシャフト３に設けたエアー吸引・排出部、６はシャフト３に設けたエアー吸引・排出部５にエアーを供給するためのエアーポンプ、７はシャフト３に設けたエアー吸引・排出部５からエアーを吸引するためのバキュームポンプ、８はエアーポンプ６もしくはバキュームポンプ７を位置決め具４に対して選択的に接続するためのマニホールド、９はシート状の防振部材２の存在を確認するための防振部材確認センサ、１０は感光体ドラム１の存在を確認するための感光体ドラム確認センサ、１１は感光体ドラム１を搬送する感光体ドラム搬送ロボット、１２は感光体ドラム１の中空円筒基体１３の両端の端部開口１３ａに装着されるフランジ、１４は感光体ドラム搬送ロボット１１に設けた感光体ドラム１を保持するための保持具、１５はシート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に装着する防振部材装着装置である。
【００２５】
図１において、ｄはシャフト３の外径を表す。
図３において、ａはシート状の防振部材２の感光体ドラム１への装着時の長手方向長さ、ｂはシート状の防振部材２の感光体ドラム１への装着時の周方向長さ、ｍはシート状の防振部材２の厚さを表す。
図４において、Ｒは感光体ドラム１の中空円筒基体１３の外径、ｒは感光体ドラム１の中空円筒基体１３の内径、Ｌは感光体ドラム１の中空円筒基体１３の長さを表す。
【００２６】
本発明の防振部材の装着方法は、シート状の防振部材２を、エアー吸引・排出部５を設けたシャフト３に位置決め具４で位置決めして巻き付け、図１（ａ）に示すように、シート状の防振部材２をシャフト３上にエアー吸引することで保持した後、その真上から保持具１４で保持した感光体ドラム１を図１（ａ）の矢印方向に下降させ、図１（ｂ）に示すように、シート状の防振部材２をエアー吸引するシャフト３を感光体ドラム１の中空円筒基体１３の内部に挿入し、シャフト３のエアー吸引部からのエアー吸引を停止することで、もしくはエアー吸引の停止に加えてエアー排出部５からエアー排出することで、シート状の防振部材２をその復元力で感光体ドラム１の内壁面に密着させ、その後、保持具１４で保持した感光体ドラム１をシャフト３の真上に向って図１（ｃ）の矢印方向に上昇させ、シャフト３が感光体ドラム１の中空円筒基体１３の内部から抜け外れ、図１（ｃ）に示すように、感光体ドラム１の内壁面にシート状の防振部材２を装着する。
図１に示す本発明の実施の形態では、鉛直上方向からの挿入の場合を一例として示しているが、挿入方向はこれにとらわれることはない。
【００２７】
本発明の防振部材の装着方法は、シート状の防振部材２を、エアー吸引部を設けたシャフト３に位置決めして巻き付け、シート状の防振部材２をシャフト３にエアー吸引することで保持した後、シート状の防振部材２をエアー吸引するシャフト３を感光体ドラム１の中空円筒基体１３の内部に挿入し、エアー吸引を停止することで、シート状の防振部材２がその復元力で感光体ドラム１の内壁面に密着する。
【００２８】
本発明の防振部材の装着方法は、シート状の防振部材２を、エアー吸引部及びエアー排出部を設けたシャフト３に位置決めして巻き付け、シート状の防振部材２をシャフト３にエアー吸引することで保持した後、シート状の防振部材２をエアー吸引するシャフト３を感光体ドラム１の中空円筒基体１３の内部に挿入し、エアー吸引の停止に加えてエアー排出することで、シート状の防振部材２がその復元力で感光体ドラム１の内壁面に密着する。
【００２９】
本発明の防振部材の装着方法は、シート状の防振部材２をエアー吸引するシャフト３に位置決めして保持した後、シャフト３に保持されたシート状の防振部材２の端部に向けて感光体ドラム１の中空円筒基体１３の端部開口１３ａを接近させ、感光体ドラム１の中空円筒基体１３の内部にシート状の防振部材２を挿入する。
【００３０】
本発明の防振部材装着装置１５は、図２に示すように、シート状の防振部材２を保持するエアー吸引・排出部５を有するシャフト３と、シート状の防振部材２をシャフト３に位置決めする位置決め手段である位置決め具４とを備えている。
【００３１】
本発明の防振部材装着装置１５は、図２に示すように、シャフト３に保持されたシート状の防振部材２の端部に向けて感光体ドラム１を把持して感光体ドラム１の中空円筒基体１３の端部開口１３ａを接近させ、感光体ドラム１の中空円筒基体１３の内部にシート状の防振部材２を挿入する感光体ドラム搬送ロボット１１を備えている。
【００３２】
本発明の防振部材装着装置１５は、図２に示すように、シート状の防振部材２のシャフト３への保持を確認する防振部材装着確認手段と、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入を確認する防振部材挿入確認手段とを備えており、防振部材装着確認手段が防振部材確認センサ９であり、防振部材挿入確認手段が感光体ドラム確認センサ１０である。
【００３３】
本発明の防振部材は、２５％圧縮荷重が１ｋｇ／ｃｍ²以下であるシート状の粘弾性材料よりなる。
【００３４】
本発明の実施の形態において、中空円筒状の導電性支持体ドラムよりなる感光体ドラム１としては、アルミニウム，銅，真鍮，亜鉛，ニッケル，ステンレス，クロム，モリブデン，バナジウム，インジウム，チタン，金，白金等の金属及び合金材料を用いることができ、その他に紙及び導電性粒子を含有したプラスチックや紙、並びに導電性ポリマーを含有するプラスチック等の合成樹脂材料を用いることができる。
また、感光体ドラム１の中空円筒基体１３の外径Ｒは、φ２０ｍｍ〜φ１００ｍｍ、感光体ドラム１の中空円筒基体１３の長さＬは、２４０ｍｍ〜４００ｍｍのものが好適に使用できる。
【００３５】
導電性支持体ドラムよりなる感光体ドラム１の中空円筒基体１３の表面上に形成される感光層としては、酸化亜鉛，硫化カドニウム等の無機光導電性材料を結着樹脂に分散させた層、セレン，セレン−テルル，ペリレン系顔料等の蒸着層、ポリビニルカルバゾール，ポリビニルピレン，ポリビニルアントラセン等の有機光導電性ポリマーよりなる層、或いは電荷発生層と電荷輸送層とに機能分離された積層構造の感光層を使用することができ、電荷発生層と電荷輸送層とに機能分離された積層構造の感光層の場合、電荷発生層及び電荷輸送層に使用される材料は、公知のものならばどのようなものでも使用することができる。
【００３６】
シート状の防振部材２としては、ポリブタジエンゴム，スチレンブタジエンゴム，ポリイソプレンゴム，ニトリルブタジエンゴム，ブチルゴム，クロロプレンゴム，ウレタンゴム，シリコンゴム，多硫化ゴム，ポリエーテル系ゴム，アクリルゴム，エチレンプロピレンゴム，プロピレンオキサイドゴム，エチレンアクリルゴム，ノルボルネンゴム，ポリアミド系エラストマー，塩化ビニル系エラストマー，合成ゴム系材料，天然ゴム，マイクロセルポリマー等の市販材料、前記ゴム材料に雲母状酸化鉄，二酸化チタン，フェライト，天然雲母，酸化コバルト等の充填材を添加した材料を用いることができる。
特に、発泡体が好ましく、ポリオレフィン発泡体、ポリスチレン発泡体、ポリウレタン発泡体、ポリ塩化ビニル発泡体、フッ素ゴム発泡体等が用いられる。
【００３７】
シート状の防振部材２の材質としては、２５％圧縮荷重が１ｋｇ／ｃｍ²以下であるシート状の粘弾性材料を用いることにより、シート状の防振部材２が適度な柔軟性を有するので、シート状の防振部材２のシャフト３への装着時、リサイクル時の作業性が向上し、良好な生産性が確保できる。
２５％圧縮荷重が１ｋｇ／ｃｍ²を超えると、シート状の防振部材２は変形しにくく、シート状の防振部材２のシャフト３への装着性が悪くなる。
なお、２５％圧縮荷重については、直径５０ｍｍのサンプルを用い、圧縮速度１ｍｍ／ｍｉｎでＪＩＳＫ−６３０１に準じて測定した。
【００３８】
シャフト３については、エアー吸引・排出の際に変形しない材質であれば、どのようなものでも使用することができる。
また、本発明の実施の形態では、円筒状であるが、これにとらわれることはない。
【００３９】
位置決め具４については、感光体ドラム１の中空円筒基体１３の内部へのシート状の防振部材２の装着したい場所によって高さを調整する必要がある。
【００４０】
また、位置決め具４に挿入導入部（面取りまたはテーパー）を設けておくと、感光体ドラム１の中空円筒基体１３の内部へのシート状の防振部材２の挿入がより容易となる。
位置決め具４の挿入導入部のテーパー面は、中心軸に対する角度が５度以上３０度以下にするとより好ましい。
【００４１】
シャフト３に設けたエアー吸引・排出部５は、シート状の防振部材２を保持できれば良く、材質、大きさ、厚さによって穴の大きさ、個数を調整すれば良い。また、シート状の防振部材２を保持しない部分は、穴を開けないようにする必要がある。
【００４２】
エアーポンプ６、バキュームポンプ７については、バキュームポンプ７によるエアー吸引時に、シート状の防振部材２をシャフト３に保持でき、エアーポンプ６によるエアー排出時に、シート状の防振部材２を感光体ドラム１の内壁面に密着できれば良く、シート状の防振部材２の材質、大きさ、厚さによって、シャフト３に設けたエアー吸引・排出部５の穴の径や、数、ポンプ出力を調整する必要がある。
【００４３】
シャフト３に保持されたシート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に装着する際、手作業で挿入しても良いが、うっかりミスによる欠品や損傷がおこることがあるため、感光体ドラム搬送ロボット１１を使って、自動化するのが良い。
感光体ドラム搬送ロボット１１は、１サイクル動作（原点から動作を開始して再び原点に戻るまでの動作）間に、感光体ドラム１の保持を1度しか行わないようにすれば、より生産効率を上げることができる。
【００４４】
防振部材確認センサ９、感光体ドラム確認センサ１０については、シート状の防振部材２、感光体ドラム１の存在が確認できればどのようなものでも用いることができる。
防振部材確認センサ９、感光体ドラム確認センサ１０としては、反射型光センサ、レーザー変位センサを用いるとより好ましい。
【００４５】
防振部材確認センサ９でシート状の防振部材２のシャフト３に対する保持が確認されたら、手作業の場合、ランプもしくは音でシート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入を促すようにし、また、感光体ドラム搬送ロボット１１を使う場合は、防振部材確認センサ９でシート状の防振部材２のシャフト３に対する保持が確認されてから、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に自動的に挿入されるようにすればより好ましい。
シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入後、感光体ドラム確認センサ１０で感光体ドラム１の存在を確認されたら、エアー吸引停止もしくは、エアー排出されるようにし、その後、シャフト３を感光体ドラム１の中空円筒基体１３の内部から引き抜く。
【００４６】
その際、感光体ドラム確認センサ１０で感光体ドラム１の存在を確認できないにも関わらず、防振部材確認センサ９でシート状の防振部材２の存在が確認された場合は、シート状の防振部材２が感光体ドラム１の中空円筒基体１３の内部に装着されなかったものとして、手作業の場合、ランプもしくは音でエラーを知らせ、もう一度シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に挿入し、また、感光体ドラム搬送ロボット１１を使って自動化されている場合は、もう一度シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に自動的に挿入されるようにするのが好ましい。
何度か連続でエラーが出た場合は、エラー品として、良品とは別の場所に搬送されるようにする。
【００４７】
シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に装着する手順としては、まず、シャフト３のエアー吸引・排出部５にシート状の防振部材２を当て、シート状の防振部材２が位置決め具４に密着するようにし、シート状の防振部材２をシャフト３上にエアー吸引することで保持する。
その際、手作業でシート状の防振部材２をシャフト３のエアー吸引・排出部５にもっていっても良いが、自動的にシート状の防振部材２をシャフト３のエアー吸引・排出部５に保持するようにしても良い。
【００４８】
自動化の例としては、シャフト３を９０度旋回できる機構を持たせ、シャフト３を９０度旋回させ、シート状の防振部材２上にシャフト３のエアー吸引・排出部５が当たるようにすること等が挙げられる。
また、手動でシャフト３のエアー吸引・排出部５にシート状の防振部材２を当てる際、防振部材確認センサ９でシート状の防振部材２の存在が確認できた場合、シート状の防振部材２がシャフト３上に自動的にエアー吸引されるようにしておくと良い。
また、シート状の防振部材２は、複数用いることもできる。
【００４９】
さらに、防振部材確認センサ９でシート状の防振部材２のシャフト３に対する保持が確認されたら、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に挿入する。
勿論、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に手作業で挿入しても良いが、感光体ドラム搬送ロボット１１を使って、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入を自動化するのがより良い。
【００５０】
シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入確認後、エアー吸引を停止することで、シート状の防振部材２をその復元力で円筒状の感光体ドラム１の内壁面に密着させることができる。
シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入確認は、感光体ドラム確認センサ１０を使うことで自動化が可能となる。
また、シャフト３上のシート状の防振部材２の保持部にエアー吸引・排出部５を設け、エアー排出することで、より確実にシート状の防振部材２をその復元力で円筒状の感光体ドラム１の内壁面に密着させることができる。
【００５１】
本発明の防振部材装着装置１５は、感光体ドラム１の中空円筒基体１３の内径ｒ（ｍｍ）、シート状の防振部材２の感光体ドラム１への装着時の周方向長さｂ（ｍｍ）、シート状の防振部材２の厚さｍ（ｍｍ）、シャフト３の外径ｄ（ｍｍ）が、下記式［１］，［２］を満たす範囲にする必要がある。
ｒ−（ｄ＋２×ｍ）≧１［１］
π×ｒ／２≦ｂ［２］
【００５２】
上記式［１］，［２］を満たす範囲にあることで、シート状の防振部材２をシャフト３に保持した状態で、感光体ドラム１の中空円筒基体１３の内径とシート状の防振部材２との間に１ｍｍ以上の隙間を持つようになり、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部にスムーズに挿入することができ、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入後は、シート状の防振部材２が感光体ドラム１の中空円筒基体１３の内部で移動することがなくなる。
【００５３】
なお、本発明は上記実施形態に限定されるものではない。
即ち、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。
【００５４】
図６は本発明の他の実施の形態に係わる防振部材の装着方法を示す原理図、（ａ）はシート状の防振部材の感光体ドラムの内部への挿入前を示す図、（ｂ）はシート状の防振部材の感光体ドラムの内部への挿入時を示す図、（ｃ）はシート状の防振部材の感光体ドラムの内部への挿入後を示す図である。
例えば、図１に示した本発明の一実施の形態に係わる防振部材の装着方法では、保持具１４で保持した感光体ドラム１をシャフト３の上方から下降させることにより、シート状の防振部材２を感光体ドラム１の内壁面に密着させて装着したが、その他に、シート状の防振部材２を、エアー吸引・排出部５を設けたシャフト３に位置決め具４で位置決めして巻き付け、図６（ａ）に示すように、シート状の防振部材２をシャフト３上にエアー吸引することで保持した後、パレット１６に立てた感光体ドラム１の真上からシート状の防振部材２を保持したシャフト３を図６（ａ）の矢印方向に下降させ、図６（ｂ）に示すように、シート状の防振部材２をエアー吸引するシャフト３をパレット１６に立てた感光体ドラム１の中空円筒基体１３の内部に挿入し、シャフト３のエアー吸引部５からのエアー吸引を停止することで、もしくはエアー吸引の停止に加えてエアー排出部５からエアー排出することで、シート状の防振部材２をその復元力で感光体ドラム１の内壁面に密着させ、その後、シャフト３をパレット１６に立てた感光体ドラム１の真上に向って図６（ｃ）の矢印方向に上昇させ、シャフト３が感光体ドラム１の中空円筒基体１３の内部から抜け外れ、図６（ｃ）に示すように、シート状の防振部材２を感光体ドラム１の内壁面に密着させて装着する構造にしても良い。
【００５５】
（実施例）
以下、本発明を実施例、比較例をあげてさらに具体的に説明するが、これにより本発明は何ら限定されるものではない。
実施例１
導電性支持体ドラムとして、外径Ｒがφ３０ｍｍ、内径ｒがφ２８．４ｍｍ、長さＬが３４０ｍｍのアルミニウムパイプを用いた。
この導電性支持体ドラムのアルミニウムパイプ基体の表面には感光層が形成され、感光体ドラム１になっている。
感光体ドラム１を形成する方法は、この実施例１では直接関与しないので詳細な説明は省略するが、導電性支持体ドラムの表面を切削し、フタロシアニンを含む電荷発生層及びブタジエン化合物とポリカーボネート樹脂からなる電荷輸送層を、塗布により形成し、感光体ドラム１を作製した。
【００５６】
シート状の防振部材２には、感光体ドラム装着時の長手方向長さａ＝１００ｍｍ、感光体ドラム装着時の周方向長さｂ＝５８ｍｍ、厚さｍ＝４ｍｍの２５％圧縮荷重が０．２ｋｇ／ｃｍ²のマイクロセルウレタンフォーム（イノアック社製
ＬＥ−２０商標）を用いた。
【００５７】
位置決め具４は、高さ１２０ｍｍ、外径２６ｍｍを用い、シート状の防振部材２を保持するシャフト３は、ステンレス製、外径ｄ＝１９．０ｍｍを用いた。
また、シート状の防振部材２を保持するシャフト３の位置決め具４の上端から軸方向高さ９５ｍｍの高さまで直径２ｍｍの穴を約１００個開け、さらに、シャフト３上の円周方向の２ｍｍは穴を開けない部分を作り、その部分にシート状の防振部材２の隙間が来るようにし、エアー吸引・排出部５とした。
【００５８】
シャフト３上のエアー吸引・排出部５にシート状の防振部材２を当て、シート状の防振部材２の端縁を位置決め具４の上端に密着するようにし、シート状の防振部材２をシャフト３上にエアー吸引することで保持した。
その時、防振部材確認センサ９でシート状の防振部材２の存在が確認できたら、自動的にエアー吸引されるようにした。
防振部材確認センサ９でシート状の防振部材２のシャフト３に対する保持が確認されたら、感光体ドラム搬送ロボット１１を使って、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部に挿入した。
シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入確認後、エアー吸引を停止することで、シート状の防振部材２をその復元力で円筒状の感光体ドラム１の内壁面に密着させることができた。
【００５９】
実施例２
シート状の防振部材２として、感光体ドラム装着時の長手方向長さａ＝１８０ｍｍ、感光体ドラム装着時の周方向長さｂ＝６０ｍｍ、厚さｍ＝２ｍｍの２５％圧縮荷重が０．４ｋｇ／ｃｍ²のマイクロセルウレタンフォーム（イノアック社製Ｌ−２４商標）を用い、位置決め具４の高さ８０ｍｍ、シャフト３の外径ｄ＝２０ｍｍにし、エアー吸引及びエアー排出できるようにし、シャフト３上の円周方向の４ｍｍは穴を開けない部分を作り、その部分にシート状の防振部材２の隙間が来るようにし、エアー排出することで、シート状の防振部材２をその復元力で円筒状の感光体ドラム１の内壁面に密着させた以外は、実施例１と同様に行った。
【００６０】
実施例３
シート状の防振部材２として、感光体ドラム装着時の長手方向長さａ＝１４０ｍｍ、感光体ドラム装着時の周方向長さｂ＝７３ｍｍ、厚さｍ＝１ｍｍの２５％圧縮荷重が０．７ｋｇ／ｃｍ²のゴムスポンジ（イノアック社製Ｃ−４３０５商標）を用い、位置決め具４の高さ１２０ｍｍ、シャフト３の外径ｄ＝２４ｍｍにし、実施例２と同様に行った。
【００６１】
実施例１〜実施例３のすべてにおいて、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部の指定位置に簡易且つ確実に挿入・密着させて装着することができ、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への装着後は、シート状の防振部材２が感光体ドラム１の中空円筒基体１３の内部で移動することがなかった。
【００６２】
比較例１
シート状の防振部材２の厚さｍを４.５ｍｍにした以外は、実施例１と同様に行った。
比較例１では、上記式［１］のｒ−（ｄ＋２×ｍ）≧１を満たす範囲に当てはまらないため、シート状の防振部材２をシャフト３に保持した状態で、感光体ドラム１の中空円筒基体１３の内径とシート状の防振部材２との間に１ｍｍ以上の隙間を持たないため、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への挿入時、シート状の防振部材２が感光体ドラム１の中空円筒基体１３の端部開口１３ａに引っかかり、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部にスムーズに挿入することができず、シート状の防振部材２がシャフト３上からめくれてしまう場合もあった。
【００６３】
比較例２
シート状の防振部材２の感光体ドラム１への装着時の周方向長さｂを４０ｍｍにした以外は、実施例１と同様に行った。
比較例２では、上記式［２］のπ×ｒ／２≦ｂを満たす範囲に当てはまらないため、シート状の防振部材２の感光体ドラム１の中空円筒基体１３の内部への装着は、シート状の防振部材２を感光体ドラム１の中空円筒基体１３の内部の指定位置に確実に挿入・密着することができたが、時間経過とともにシート状の防振部材２と感光体ドラム１の内壁面との間に隙間が生じ、感光体ドラム１の中空円筒基体１３の内部に装着したシート状の防振部材２がちょっとした衝撃で移動してしまった。
【００６４】
【発明の効果】
本発明の防振部材の装着方法によれば、シート状の防振部材を、エアー吸引部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー吸引を停止することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着する方法を用いることにより、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に簡単に挿入・密着させて装着することができる。
【００６５】
本発明の防振部材の装着方法によれば、シート状の防振部材を、エアー吸引部及びエアー排出部を設けたシャフトに位置決めして巻き付け、シート状の防振部材をシャフトにエアー吸引することで保持した後、シート状の防振部材をエアー吸引するシャフトを感光体ドラムの中空円筒基体の内部に挿入し、エアー排出することで、シート状の防振部材がその復元力で感光体ドラムの内壁面に密着する方法を用いることにより、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、シート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に簡易且つ確実に挿入・密着させて装着することができる。
【００６６】
本発明の防振部材の装着方法によれば、シート状の防振部材をエアー吸引するシャフトに位置決めして保持した後、シャフトに保持されたシート状の防振部材の端部に向けて感光体ドラムの中空円筒基体の端部開口を接近させ、感光体ドラムの中空円筒基体の内部にシート状の防振部材を挿入する方法を用いることにより、装着の困難なシート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入をより確実に行うことができる。
【００６７】
本発明の防振部材装着装置によれば、シート状の防振部材を保持するエアー吸引部を有するシャフトと、シート状の防振部材をシャフトに位置決めする位置決め手段とを備えた装置を用いることにより、シート状の防振部材をシャフトに巻き付けるのみで、シャフトのエアー吸引部がシート状の防振部材をエアー吸引するので、シート状の防振部材をシャフトにエアー吸引で保持することができ、位置決め手段がシート状の防振部材をシャフトに位置決めするので、装着の困難なシート状の防振部材を感光体ドラムの中空円筒基体の内部の指定位置に挿入・密着して装着することができる。
【００６８】
本発明の防振部材装着装置によれば、シャフトに保持されたシート状の防振部材の端部に向けて感光体ドラムを把持して感光体ドラムの中空円筒基体の端部開口を接近させ、感光体ドラムの中空円筒基体の内部にシート状の防振部材を挿入する感光体ドラム搬送ロボットを備えていることで、感光体ドラム搬送ロボットがシート状の防振部材を感光体ドラムの中空円筒基体の内部に挿入するので、感光体ドラム搬送ロボットを使用して、シート状の防振部材を感光体ドラムの中空円筒基体の内部に挿入する装着作業を自動化することができ、感光体ドラムの中空円筒基体の表面の感光層を手で握ることなく、装着の困難なシート状の防振部材の感光体ドラムの中空円筒基体の内部への装着作業を大幅に効率化することができる。
【００６９】
本発明の防振部材装着装置によれば、シート状の防振部材のシャフトへの保持を確認する防振部材装着確認手段と、シート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入を確認する防振部材挿入確認手段とを備えていることで、防振部材装着確認手段がシート状の防振部材のシャフトへの保持を確認し、防振部材挿入確認手段がシート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入を確認するので、シート状の防振部材の感光体ドラムの中空円筒基体の内部への装着をより確実に行うことができる。
【００７０】
本発明の防振部材装着装置によれば、感光体ドラムの中空円筒基体の内径ｒ（ｍｍ）、シート状の防振部材の感光体ドラム装着時の周方向長さｂ（ｍｍ）、シート状の防振部材の厚さｍ（ｍｍ）、シャフトの外径ｄ（ｍｍ）が、下記式［１］，［２］を満たす範囲にあることで、
ｒ−（ｄ＋２×ｍ）≧１［１］
π×ｒ／２≦ｂ［２］
シート状の防振部材をシャフトに保持した状態で、感光体ドラムの中空円筒基体の内径とシート状の防振部材との間に１ｍｍ以上の隙間を持つようになり、シート状の防振部材を感光体ドラムの中空円筒基体の内部にスムーズに挿入することができ、シート状の防振部材の感光体ドラムの中空円筒基体の内部への挿入後は、シート状の防振部材が感光体ドラムの中空円筒基体の内部で移動することがなくなる。
【００７１】
本発明の防振部材によれば、２５％圧縮荷重が１ｋｇ／ｃｍ²以下であるシート状の粘弾性材料を用いることにより、防振部材が適度な柔軟性を有するので、防振部材のシャフトへの装着時、リサイクル時の作業性が向上し、従来のスリットを有する円筒状の防振部材などの他の防振部材に比べて、材料費が安価であり、良好な生産性が確保できる。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係わる防振部材の装着方法を示す原理図。
【図２】本発明の一実施の形態に係わる防振部材装着装置を示す概略図。
【図３】本発明の一実施の形態に係わるシート状の防振部材の一例を示す斜視図。
【図４】本発明の電子写真感光体ドラムの一例を示す斜視図。
【図５】本発明のシート状の防振部材を内蔵された電子写真感光体ドラムへのフランジの装着前の状態を示す斜視図。
【図６】本発明の他の実施の形態に係わる防振部材の装着方法を示す原理図。
【符号の説明】
１感光体ドラム（導電性支持体ドラム）
２シート状の防振部材
３シャフト
４位置決め具（位置決め手段）
５エアー吸引・排出部
６エアーポンプ
７バキュームポンプ
８マニホールド
９防振部材確認センサ（防振部材装着確認手段）
１０感光体ドラム確認センサ（防振部材挿入確認手段）
１１感光体ドラム搬送ロボット
１２フランジ
１３中空円筒基体
１３ａ端部開口
１４保持具
１５防振部材装着装置
１６パレット
ａシート状の防振部材の感光体ドラム装着時の長手方向長さ
ｂシート状の防振部材の感光体ドラム装着時の周方向長さ
ｄシャフトの外径
ｍシート状の防振部材の厚さ
Ｒ感光体ドラムの中空円筒基体の外径
ｒ感光体ドラムの中空円筒基体の内径
Ｌ感光体ドラムの中空円筒基体の長さ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolating member for an electrophotographic photosensitive drum, and in particular, a method for mounting a sheet-like vibration isolating member on an inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate, and a vibration isolating member The present invention relates to a mounting device and a vibration isolation member.
[0002]
[Prior art]
In an electrophotographic apparatus such as a copying machine, a printer, and a facsimile, a photosensitive drum that forms a latent image while rotating is used.
For example, the photosensitive drum uses an aluminum drum as a photosensitive member support, and the photosensitive member is deposited or coated.
[0003]
As the electrophotographic apparatus is reduced in size and weight, an electrophotographic apparatus is required to have a small diameter support and a thin support.
[0004]
Conventionally, when an electrophotographic photosensitive drum is cleaned by pressing a cleaning blade against the surface of the photosensitive member, a resonance noise may be generated or abnormal noise may be generated due to resonance with a contact charger. Due to the above-mentioned support for downsizing and thinning, the problem of abnormal noise of the photosensitive drum has increased in frequency and has become more important year by year.
[0005]
As a resonance sound caused by friction between the cleaning blade and the photosensitive drum, an abnormal sound generated during continuous use is known mainly in a high temperature and high humidity environment.
Further, as a resonance sound between the contact charger and the photosensitive drum, an abnormal sound depending on the frequency of the AC voltage applied to the contact charger is known.
[0006]
As a measure for preventing abnormal noise on the photosensitive drum, a certain filler is inserted and fixed inside the hollow cylindrical base of the electrophotographic photosensitive drum.
[0007]
As the shape of the filler, a structure combined with a spring (see Japanese Utility Model Publication Nos. 62-127567 and 11-305598), a spiral shape (see Japanese Patent Application Laid-Open No. 8-62878), and a cylindrical type (special JP 2000-89612 A) and the like have been proposed.
[0008]
Examples of the material of the filler include a porous elastic body (see Japanese Patent Laid-Open No. 63-60481), a weight member having a specific JIS hardness (see Japanese Patent Laid-Open No. 5-35166), and a foamed polyurethane (Japanese Patent Laid-Open Publication No. 63-271388), a viscoelastic material (see Japanese Patent No. 2913689), a filler (refer to Japanese Patent No. 3259554) that defines a linear expansion coefficient, and the like have been proposed.
[0009]
Furthermore, regarding the method of inserting the filler, Japanese Patent Laid-Open No. 2001-305908 has proposed a cylindrical filler having a slit.
However, there is no proposal about the insertion method and insertion apparatus of a sheet-like filler.
[0010]
Therefore, it has been desired to provide an insertion method and an insertion device for inserting a sheet-shaped vibration isolating member into the hollow cylindrical base of the photosensitive drum.
[0011]
[Problems to be solved by the invention]
However, the material vibration of the sheet-like vibration isolating member is lower than that of other vibration isolating members such as a cylindrical anti-vibration member having a slit. There was a problem in practical use because it was difficult to insert and adhere to a designated position inside the cylindrical base body and there was a problem in workability.
[0012]
When the vibration isolator is manually inserted into the hollow cylindrical substrate of the photosensitive drum, it is difficult to insert the vibration isolator into the hollow cylindrical substrate of the photosensitive drum unless the surface of the photosensitive member is gripped by hand. In this case, missing parts and damage on the surface of the photoreceptor are inevitable.
[0013]
In addition, after the vibration isolating member is inserted into the hollow cylindrical substrate of the photosensitive drum, the vibration isolating member is attached to the photosensitive drum in order to prevent the vibration isolating member from moving inside the hollow cylindrical substrate of the photosensitive drum. It is necessary to fix to the inner wall surface with an adhesive or to deteriorate the slipperiness of the surface of the vibration isolating member.
If it does so, it will become difficult to insert the anti-vibration member into the inside of the hollow cylindrical base of the photosensitive drum.
In addition, due to the poor insertability of the vibration-proof member, it is unavoidable that a missing part or damage due to a mistake is inadvertent.
Furthermore, when the vibration isolating member is fixed to the inner wall surface of the photosensitive drum with an adhesive, it is difficult to remove the vibration isolating member from the photosensitive drum during recycling.
[0014]
Accordingly, an object of the present invention is to provide a vibration isolation member mounting method capable of simply and reliably inserting and attaching a sheet-shaped vibration isolation member to a designated position inside the hollow cylindrical base of the photosensitive drum, The object is to provide an anti-vibration member mounting device and an anti-vibration member.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the vibration isolating member mounting method of the present invention is a method in which a sheet-shaped vibration isolating member is mounted on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate. The sheet-like vibration isolating member is positioned and wound around a shaft provided with an air suction portion, and the sheet-like vibration isolating member is held by sucking air to the shaft. By inserting a shaft for air suction into the hollow cylindrical base of the photosensitive drum and stopping the air suction, the sheet-like vibration isolating member is closely attached to the inner wall surface of the photosensitive drum by its restoring force. To do.
According to the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member is positioned and wound around the shaft provided with the air suction portion, and the sheet-like anti-vibration member is held by air suction on the shaft. After that, a shaft for air-sucking the sheet-like vibration isolating member is inserted into the hollow cylindrical base of the photosensitive drum, and the air-suction is stopped, so that the sheet-like vibration isolating member uses the restoring force of the photosensitive drum. By using the method of closely contacting the inner wall surface, the sheet-shaped vibration isolating member is placed at a designated position inside the hollow cylindrical substrate of the photosensitive drum without grasping the photosensitive layer on the surface of the hollow cylindrical substrate of the photosensitive drum by hand. It can be easily inserted and attached in close contact.
[0016]
The vibration isolating member mounting method of the present invention is a method of mounting a sheet-like vibration isolating member on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate, the sheet-like anti-vibration member. A shaft that positions and winds a vibration member around a shaft provided with an air suction part and an air discharge part, holds the sheet-like vibration isolation member by air suction to the shaft, and then sucks the sheet-like vibration isolation member by air. Is inserted into the hollow cylindrical base of the photosensitive drum, In addition to stopping air suction By discharging the air, the sheet-like vibration isolating member comes into close contact with the inner wall surface of the photosensitive drum by its restoring force.
According to the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member is positioned and wound on the shaft provided with the air suction portion and the air discharge portion, and the sheet-like vibration isolating member is air sucked onto the shaft. After that, the shaft that sucks the sheet-like vibration isolating member into the air is inserted into the hollow cylindrical base of the photosensitive drum, In addition to stopping air suction By discharging air, the sheet-like vibration isolating member is brought into close contact with the inner wall surface of the photosensitive drum by its restoring force, so that the photosensitive layer on the surface of the hollow cylindrical substrate of the photosensitive drum can be grasped by hand. The sheet-shaped vibration-proof member can be easily and securely inserted and attached to a designated position inside the hollow cylindrical substrate of the photosensitive drum.
[0017]
The mounting method of the vibration isolator of the present invention is as follows: in front Air suction of sheet-like vibration isolator in front After positioning and holding on the shaft, the end opening of the hollow cylindrical base of the photosensitive drum is brought close to the end of the sheet-shaped vibration isolating member held on the shaft, and the photosensitive drum Hollow cylinder base To a predetermined position inside the body The sheet-like vibration isolating member is inserted.
According to the mounting method of the vibration isolating member of the present invention, after the sheet-like vibration isolating member is positioned and held on the air suction shaft, the sheet-like anti-vibration member is exposed toward the end of the sheet anti-vibration member held on the shaft. By using a method in which the end opening of the hollow cylindrical substrate of the body drum is brought close to the sheet drum and the sheet-shaped vibration damping member is inserted into the hollow cylindrical substrate of the photosensitive drum, The photosensitive drum can be more reliably inserted into the hollow cylindrical base.
[0018]
The vibration isolator mounting device of the present invention is a device for mounting a sheet-like vibration isolator on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate, the sheet-like anti-vibration member. A shaft having an air suction portion for holding the member, and the sheet-like vibration isolating member as the shaft. In place on top Positioning means for positioning Positioning and holding the sheet-shaped vibration isolating member on the shaft by air suction through the air suction part, and air suction means for releasing the holding by stopping air suction, and After positioning and holding the sheet-like vibration isolating member on the shaft that sucks air, the end of the hollow cylindrical substrate of the photosensitive drum toward the end of the sheet-like vibration isolating member held on the shaft Anti-vibration member insertion means that operates so as to close the opening and insert the sheet-like anti-vibration member to a predetermined position inside the hollow cylindrical base of the photosensitive drum. It has the structure characterized by having provided.
According to the vibration isolator mounting device of the present invention, an apparatus including a shaft having an air suction portion for holding a sheet-like vibration isolating member and positioning means for positioning the sheet-like vibration isolating member on the shaft is used. By simply winding the sheet-shaped vibration isolating member around the shaft, the air suction part of the shaft air-sucks the sheet-shaped vibration isolating member, so that the sheet-shaped vibration isolating member can be held on the shaft by air suction. Since the positioning means positions the sheet-like vibration isolating member on the shaft, it is possible to insert the sheet-like vibration isolating member which is difficult to attach into the designated position inside the hollow cylindrical base of the photosensitive drum and attach it in close contact. it can.
[0019]
Vibration isolator mounting device of the present invention The vibration isolator insertion means in , in front Held on the shaft in front Toward the end of the sheet-shaped vibration isolator in front Holding the photosensitive drum The The end opening of the hollow cylindrical substrate of the photosensitive drum is brought close to the sheet drum, and the sheet-shaped vibration isolating member is inserted into the hollow cylindrical substrate of the photosensitive drum. Works like Photosensitive drum transfer robot It is characterized by .
According to the vibration isolator mounting device of the present invention, the photosensitive drum is gripped toward the end of the sheet-like vibration isolator held by the shaft so that the end opening of the hollow cylindrical base of the photoconductor drum approaches. The photosensitive drum transport robot includes a photosensitive drum transport robot that inserts a sheet-shaped vibration isolating member inside the hollow cylindrical base body of the photoconductive drum. Since it is inserted into the cylindrical substrate, it is possible to automate the mounting operation of inserting the sheet-shaped vibration isolating member into the hollow cylindrical substrate of the photosensitive drum using the photosensitive drum transport robot. Therefore, it is possible to greatly improve the efficiency of mounting the sheet-shaped vibration-proof member, which is difficult to mount, on the inside of the hollow cylindrical substrate without gripping the photosensitive layer on the surface of the hollow cylindrical substrate.
[0020]
The vibration isolator mounting device of the present invention is in front Of sheet-shaped anti-vibration member in front The vibration isolator mounting confirmation means for confirming the holding on the shaft, and the sheet-like anti-vibration member in front An anti-vibration member insertion confirmation means for confirming the insertion of the photosensitive drum into the hollow cylindrical base, wherein the anti-vibration member mounting confirmation means is an anti-vibration member confirmation sensor, and the anti-vibration member insertion confirmation The means is a photosensitive drum confirmation sensor It is characterized by .
According to the vibration isolator mounting device of the present invention, the vibration isolator mounting confirmation means for confirming the holding of the sheet vibration isolator on the shaft, and the inside of the hollow cylindrical substrate of the photosensitive drum of the sheet vibration isolator Vibration isolation member insertion confirmation means for confirming insertion into the sheet, so that the vibration isolation member mounting confirmation means confirms the holding of the sheet-shaped vibration isolation member on the shaft, and the vibration isolation member insertion confirmation means Since the insertion of the sheet-shaped vibration isolating member into the hollow cylindrical substrate of the photosensitive drum is confirmed, the sheet-shaped vibration isolating member can be more reliably mounted inside the hollow cylindrical substrate. .
[0021]
The vibration isolator mounting device of the present invention includes an inner diameter r (mm) of the hollow cylindrical base of the photosensitive drum, a circumferential length b (mm) when the photosensitive drum of the sheet-shaped anti-vibration member is mounted, and a sheet-shaped anti-vibration device. It is preferable that the thickness m (mm) of the vibration member and the outer diameter d (mm) of the shaft are in a range satisfying the following formulas [1] and [2].
r− (d + 2 × m) ≧ 1 [1]
π × r / 2 ≦ b [2]
According to the vibration isolator mounting device of the present invention, the inner diameter r (mm) of the hollow cylindrical substrate of the photosensitive drum, the circumferential length b (mm) when the photosensitive drum of the sheet vibration isolator is mounted, and the sheet shape When the thickness m (mm) of the vibration isolating member and the outer diameter d (mm) of the shaft are in a range satisfying the above formulas [1] and [2], the sheet-like vibration isolating member is held on the shaft. In this state, a gap of 1 mm or more is provided between the inner diameter of the hollow cylindrical base of the photosensitive drum and the sheet-like vibration isolating member, and the sheet-like vibration isolating member is placed inside the hollow cylindrical base of the photosensitive drum. After inserting the sheet-like vibration isolating member into the hollow cylindrical substrate of the photosensitive drum, the sheet-like vibration isolating member moves inside the hollow cylindrical substrate of the photosensitive drum. Disappears.
[0022]
Anti-vibration member of the present invention Anti-vibration member used directly for carrying out the mounting method 25% compressive load is 1kg / cm ² It consists of the following sheet-like viscoelastic materials.
According to the vibration isolator of the present invention, the 25% compression load is 1 kg / cm. ² By using the following sheet-like viscoelastic material, the vibration-proof member has appropriate flexibility, so that the workability during recycling is improved when the vibration-proof member is attached to the shaft, and a conventional slit is provided. Compared to other anti-vibration members such as a cylindrical anti-vibration member, the material cost is low and good productivity can be secured.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a principle view showing a mounting method of a vibration isolating member according to an embodiment of the present invention, (a) is a diagram showing a sheet-like vibration isolating member before being inserted into a photosensitive drum, and (b). FIG. 7 is a diagram illustrating a state in which a sheet-shaped vibration isolating member is inserted into the photosensitive drum, and FIG. 5C is a diagram illustrating a sheet-shaped vibration isolating member after being inserted into the photosensitive drum.
FIG. 2 is a schematic diagram showing a vibration isolator mounting device according to an embodiment of the present invention.
3 is a perspective view showing an example of a sheet-shaped vibration isolating member according to an embodiment of the present invention, FIG. 4 is a perspective view showing an example of an electrophotographic photosensitive drum of the present invention, and FIG. 5 is a sheet of the present invention. It is a perspective view which shows the state before mounting | wearing with the flange to the electrophotographic photosensitive drum in which the vibration isolating member of a shape was incorporated.
[0024]
In FIG. 1 to FIG. 5, reference numeral 1 denotes a photosensitive drum comprising a conductive support drum having a photosensitive layer on the surface of a hollow cylindrical substrate 13, and 2 denotes a sheet-like shape mounted inside the hollow cylindrical substrate 13 of the photosensitive drum 1. 3 is a shaft for winding and holding the sheet-like vibration isolating member 2, 4 is a positioning tool for positioning the sheet-like vibration isolating member 2 on the shaft 3, and 5 is provided on the shaft 3. An air suction / discharge section, 6 is an air pump for supplying air to the air suction / discharge section 5 provided on the shaft 3, and 7 is a vacuum for sucking air from the air suction / discharge section 5 provided on the shaft 3. Pump, 8 is air pump 6 Or Vacuum pump 7 Selective for positioning tool 4 Connecting for A manifold, 9 is a vibration isolation member confirmation sensor for confirming the presence of the sheet-like vibration isolation member 2, 10 is a photoreceptor drum confirmation sensor for confirming the presence of the photoreceptor drum 1, and 11 is a photoreceptor drum 1. A photosensitive drum transport robot for transporting, 12 is a flange attached to the end openings 13a at both ends of the hollow cylindrical base 13 of the photosensitive drum 1, and 14 is for holding the photosensitive drum 1 provided in the photosensitive drum transport robot 11. A holder 15 for mounting the vibration isolating member 2 attaches the sheet-like vibration isolating member 2 to the inside of the hollow cylindrical base 13 of the photosensitive drum 1.
[0025]
In FIG. 1, d represents the outer diameter of the shaft 3.
In FIG. 3, a is a longitudinal length when the sheet-like vibration isolating member 2 is attached to the photosensitive drum 1, and b is a circumferential length when the sheet-like vibration isolating member 2 is attached to the photosensitive drum 1. Here, m represents the thickness of the sheet-shaped vibration isolating member 2.
In FIG. 4, R represents the outer diameter of the hollow cylindrical substrate 13 of the photosensitive drum 1, r represents the inner diameter of the hollow cylindrical substrate 13 of the photosensitive drum 1, and L represents the length of the hollow cylindrical substrate 13 of the photosensitive drum 1.
[0026]
In the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member 2 is positioned and wound around the shaft 3 provided with the air suction / discharge portion 5 by the positioning tool 4 as shown in FIG. Then, after holding the sheet-like vibration isolating member 2 by sucking air onto the shaft 3, the photosensitive drum 1 held by the holder 14 is lowered from directly above in the direction of the arrow in FIG. As shown in FIG. 1B, the shaft 3 for sucking the sheet-like vibration isolating member 2 by air is inserted into the hollow cylindrical base 13 of the photosensitive drum 1, and the shaft 3 is sucked by air. By stopping air suction from the head or in addition to stopping air suction By discharging air from the discharge unit 5, the sheet-like vibration isolating member 2 is brought into close contact with the inner wall surface of the photoconductive drum 1 by its restoring force, and then the photoconductive drum 1 held by the holder 14 is attached to the shaft 3. The shaft 3 is lifted upward in the direction of the arrow in FIG. 1C, and the shaft 3 comes off from the inside of the hollow cylindrical base 13 of the photosensitive drum 1, and as shown in FIG. The sheet-like vibration isolating member 2 is attached to the wall surface.
In the embodiment of the present invention shown in FIG. 1, the case of insertion from the vertically upward direction is shown as an example, but the insertion direction is not limited to this.
[0027]
The mounting method of the vibration isolating member of the present invention is such that the sheet-like vibration isolating member 2 is positioned and wound around the shaft 3 provided with the air suction portion, and the sheet-like anti-vibration member 2 is air sucked onto the shaft 3. After the holding, the shaft 3 for sucking the sheet-like vibration isolating member 2 into the air is inserted into the hollow cylindrical base 13 of the photosensitive drum 1 and the air suction is stopped. It comes in close contact with the inner wall surface of the photosensitive drum 1 with a restoring force.
[0028]
In the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member 2 is positioned and wound around the shaft 3 provided with the air suction part and the air discharging part, and the sheet-like anti-vibration member 2 is aired around the shaft 3. After holding by sucking, the shaft 3 for sucking the sheet-like vibration isolating member 2 by air is inserted into the hollow cylindrical base 13 of the photosensitive drum 1, In addition to stopping air suction By discharging air, the sheet-like vibration isolating member 2 is brought into close contact with the inner wall surface of the photosensitive drum 1 by its restoring force.
[0029]
The vibration isolator mounting method of the present invention is to position and hold the sheet-like anti-vibration member 2 on the air-sucking shaft 3 and then toward the end of the sheet-like anti-vibration member 2 held on the shaft 3. Then, the end opening 13 a of the hollow cylindrical base 13 of the photosensitive drum 1 is brought close to the sheet-like vibration isolating member 2 into the hollow cylindrical base 13 of the photosensitive drum 1.
[0030]
As shown in FIG. 2, the vibration isolator mounting device 15 of the present invention includes a shaft 3 having an air suction / discharge unit 5 that holds the sheet-like vibration isolator 2, and the sheet-like anti-vibration member 2 as the shaft 3. And a positioning tool 4 which is a positioning means for positioning the head.
[0031]
As shown in FIG. 2, the vibration isolator mounting device 15 of the present invention grips the photosensitive drum 1 toward the end of the sheet-like vibration isolator 2 held by the shaft 3, and A photosensitive drum transport robot 11 is provided to approach the end opening 13a of the hollow cylindrical base 13 and insert the sheet-shaped vibration isolating member 2 into the hollow cylindrical base 13 of the photosensitive drum 1.
[0032]
As shown in FIG. 2, the vibration isolator mounting device 15 of the present invention includes a vibration isolator mounting confirmation means for confirming the holding of the sheet vibration isolator 2 on the shaft 3, and the sheet vibration isolator 2. A vibration isolation member insertion confirmation means for confirming the insertion of the photosensitive drum 1 into the hollow cylindrical base body 13, and the vibration isolation member mounting confirmation means is the vibration isolation member confirmation sensor 9, and the vibration isolation member insertion confirmation is performed. The means is a photosensitive drum confirmation sensor 10.
[0033]
The vibration isolator of the present invention has a 25% compressive load of 1 kg / cm. ² It consists of the following sheet-like viscoelastic materials.
[0034]
In the embodiment of the present invention, the photosensitive drum 1 formed of a hollow cylindrical conductive support drum includes aluminum, copper, brass, zinc, nickel, stainless steel, chromium, molybdenum, vanadium, indium, titanium, gold, Metals such as platinum and alloy materials can be used, and plastics and papers containing paper and conductive particles, and synthetic resin materials such as plastics containing conductive polymers can also be used.
Further, the outer diameter R of the hollow cylindrical substrate 13 of the photosensitive drum 1 is preferably 20 mm to 100 mm, and the length L of the hollow cylindrical substrate 13 of the photosensitive drum 1 is preferably 240 mm to 400 mm.
[0035]
As the photosensitive layer formed on the surface of the hollow cylindrical base 13 of the photosensitive drum 1 made of a conductive support drum, a layer in which an inorganic photoconductive material such as zinc oxide or cadmium sulfide is dispersed in a binder resin, Vapor deposition layer such as selenium, selenium-tellurium, perylene pigment, layer made of organic photoconductive polymer such as polyvinylcarbazole, polyvinylpyrene, polyvinylanthracene, etc. A photosensitive layer can be used. In the case of a photosensitive layer having a laminated structure in which a charge generation layer and a charge transport layer are functionally separated, any known materials can be used for the charge generation layer and the charge transport layer. Something like that can also be used.
[0036]
The sheet-like vibration isolator 2 includes polybutadiene rubber, styrene butadiene rubber, polyisoprene rubber, nitrile butadiene rubber, butyl rubber, chloroprene rubber, urethane rubber, silicon rubber, polysulfide rubber, polyether rubber, acrylic rubber, ethylene propylene. Rubber, propylene oxide rubber, ethylene acrylic rubber, norbornene rubber, polyamide-based elastomer, vinyl chloride-based elastomer, synthetic rubber-based material, natural rubber, microcell polymer, and other commercially available materials, including the mica-like iron oxide, titanium dioxide, Materials added with fillers such as ferrite, natural mica, and cobalt oxide can be used.
In particular, foam is preferable, and polyolefin foam, polystyrene foam, polyurethane foam, polyvinyl chloride foam, fluororubber foam, and the like are used.
[0037]
The material of the sheet-like vibration isolator 2 is a 25% compressive load of 1 kg / cm. ² By using the following sheet-like viscoelastic material, the sheet-like vibration isolating member 2 has appropriate flexibility. Therefore, when the sheet-like vibration isolating member 2 is attached to the shaft 3, the workability during recycling is improved. As a result, good productivity can be secured.
25% compressive load is 1 kg / cm ² If it exceeds 1, the sheet-like vibration isolating member 2 is hardly deformed, and the mounting property of the sheet-like vibration isolating member 2 to the shaft 3 is deteriorated.
The 25% compression load was measured according to JIS K-6301 at a compression speed of 1 mm / min using a sample having a diameter of 50 mm.
[0038]
Any material can be used for the shaft 3 as long as it does not deform during air suction / discharge.
Moreover, in embodiment of this invention, although it is cylindrical shape, it does not get caught by this.
[0039]
As for the positioning tool 4, it is necessary to adjust the height depending on the place where the sheet-like vibration isolating member 2 is to be mounted inside the hollow cylindrical base 13 of the photosensitive drum 1.
[0040]
Further, if an insertion introducing portion (chamfering or taper) is provided in the positioning tool 4, it becomes easier to insert the sheet-shaped vibration isolating member 2 into the hollow cylindrical base 13 of the photosensitive drum 1.
More preferably, the tapered surface of the insertion introducing portion of the positioning tool 4 has an angle with respect to the central axis of 5 degrees or more and 30 degrees or less.
[0041]
The air suction / discharge unit 5 provided on the shaft 3 only needs to be able to hold the sheet-like vibration isolating member 2, and the size and number of holes may be adjusted depending on the material, size, and thickness. Moreover, it is necessary to prevent a hole from being formed in a portion that does not hold the sheet-like vibration isolating member 2.
[0042]
As for the air pump 6 and the vacuum pump 7, the sheet-like vibration isolating member 2 can be held on the shaft 3 when the vacuum pump 7 sucks air, and when the air pump 6 discharges the air, the sheet-like vibration isolating member 2 is held on the photosensitive member. It only needs to be in close contact with the inner wall surface of the drum 1, and the diameter, number, and pump output of the air suction / discharge section 5 provided on the shaft 3 are adjusted according to the material, size, and thickness of the sheet-like vibration isolating member 2. There is a need to.
[0043]
When the sheet-like vibration isolating member 2 held by the shaft 3 is mounted inside the hollow cylindrical base 13 of the photosensitive drum 1, it may be inserted manually, but an inadvertently missing item or damage may occur. Therefore, it is preferable to automate using the photosensitive drum transport robot 11.
If the photosensitive drum 1 is held only once during one cycle operation (operation starting from the origin and returning to the origin again), the photosensitive drum transport robot 11 is more productive. Can be raised.
[0044]
Any vibration isolation member confirmation sensor 9 and photosensitive drum confirmation sensor 10 can be used as long as the presence of the sheet-like vibration isolation member 2 and the photosensitive drum 1 can be confirmed.
As the vibration isolation member confirmation sensor 9 and the photosensitive drum confirmation sensor 10, it is more preferable to use a reflection type optical sensor or a laser displacement sensor.
[0045]
When the vibration isolating member confirmation sensor 9 confirms that the sheet-like vibration isolating member 2 is held on the shaft 3, in the case of manual work, the hollow cylindrical base 13 of the photosensitive drum 1 of the sheet anti-vibration member 2 by a lamp or sound. When the photosensitive drum transport robot 11 is used, the sheet-like anti-vibration member 2 is confirmed to be held on the shaft 3 by the anti-vibration member-confirming sensor 9 and then the sheet-like one is used. It is more preferable that the vibration isolating member 2 is automatically inserted into the hollow cylindrical base 13 of the photosensitive drum 1.
After the sheet-shaped vibration isolating member 2 is inserted into the hollow cylindrical base 13 of the photosensitive drum 1, if the presence of the photosensitive drum 1 is confirmed by the photosensitive drum confirmation sensor 10, the air suction is stopped or the air is discharged. After that, the shaft 3 is pulled out from the inside of the hollow cylindrical base 13 of the photosensitive drum 1.
[0046]
At this time, when the presence of the sheet-like vibration isolating member 2 is confirmed by the vibration isolating member confirmation sensor 9 even though the presence of the photoconductive drum 1 cannot be confirmed by the photoconductive drum confirmation sensor 10, Assuming that the vibration isolator 2 is not mounted inside the hollow cylindrical base 13 of the photosensitive drum 1, in the case of manual work, an error is notified by a lamp or sound, and the sheet-like anti-vibration member 2 is once again attached to the photosensitive drum 1. In the case of being automated using the photosensitive drum transport robot 11, the sheet-like vibration isolating member 2 is once again inserted into the hollow cylindrical substrate 13 of the photosensitive drum 1. It is preferable to insert them automatically.
If an error occurs several times in succession, the error product is transported to a different location from the non-defective product.
[0047]
As a procedure for mounting the sheet-like vibration isolating member 2 inside the hollow cylindrical base 13 of the photosensitive drum 1, first, the sheet-like vibration isolating member 2 is applied to the air suction / discharge portion 5 of the shaft 3 to form a sheet. The anti-vibration member 2 is in close contact with the positioning tool 4 and the sheet-like anti-vibration member 2 is held on the shaft 3 by air suction.
At this time, the sheet-like vibration isolating member 2 may be manually placed in the air suction / discharge portion 5 of the shaft 3, but the sheet-like vibration isolating member 2 is automatically moved to the air suction / discharge portion of the shaft 3. 5 may be held.
[0048]
As an example of automation, a mechanism capable of turning the shaft 3 by 90 degrees is provided, the shaft 3 is turned 90 degrees, and the air suction / discharge section 5 of the shaft 3 hits the sheet-shaped vibration isolating member 2. Etc.
Further, when the sheet-like vibration isolating member 2 is manually applied to the air suction / discharge unit 5 of the shaft 3, the presence of the sheet-like vibration isolating member 2 can be confirmed by the vibration isolating member confirmation sensor 9. It is preferable that the vibration isolator 2 be automatically sucked onto the shaft 3.
Further, a plurality of sheet-like vibration isolating members 2 can be used.
[0049]
Further, when the vibration isolator confirmation sensor 9 confirms that the sheet vibration isolator 2 is held on the shaft 3, the sheet vibration isolator 2 is inserted into the hollow cylindrical base 13 of the photosensitive drum 1.
Needless to say, the sheet-like vibration isolating member 2 may be manually inserted into the hollow cylindrical base 13 of the photosensitive drum 1, but the sheet-like vibration isolating member 2 of the sheet-like vibration isolating member 2 is used by using the photosensitive drum transport robot 11. It is better to automate the insertion of the photosensitive drum 1 into the hollow cylindrical substrate 13.
[0050]
After confirming that the sheet-like vibration isolating member 2 is inserted into the hollow cylindrical substrate 13 of the photosensitive drum 1, the air suction is stopped, so that the sheet-like vibration isolating member 2 is restored to the cylindrical photoconductor by its restoring force. It can be brought into close contact with the inner wall surface of the drum 1.
Confirmation of the insertion of the sheet-shaped vibration isolating member 2 into the hollow cylindrical base 13 of the photosensitive drum 1 can be automated by using the photosensitive drum confirmation sensor 10.
Further, an air suction / discharge part 5 is provided in the holding part of the sheet-like vibration isolating member 2 on the shaft 3 and the air is discharged, so that the sheet-like anti-vibration member 2 is more reliably cylindrical with its restoring force. It can be brought into close contact with the inner wall surface of the photosensitive drum 1.
[0051]
The vibration isolator mounting device 15 of the present invention includes an inner diameter r (mm) of the hollow cylindrical base 13 of the photosensitive drum 1 and a circumferential length b (when the sheet vibration isolator 2 is mounted on the photosensitive drum 1). mm), the thickness m (mm) of the sheet-shaped vibration-proof member 2, and the outer diameter d (mm) of the shaft 3 must be in a range satisfying the following equations [1] and [2].
r− (d + 2 × m) ≧ 1 [1]
π × r / 2 ≦ b [2]
[0052]
By being in a range satisfying the above equations [1] and [2], the sheet-shaped vibration isolating member 2 is held on the shaft 3, and the inner diameter of the hollow cylindrical base 13 of the photosensitive drum 1 and the sheet-shaped vibration isolating are maintained. A gap of 1 mm or more is provided between the member 2 and the sheet-like vibration isolating member 2 can be smoothly inserted into the hollow cylindrical base 13 of the photosensitive drum 1. After the second photosensitive drum 1 is inserted into the hollow cylindrical substrate 13, the sheet-shaped vibration isolating member 2 does not move inside the hollow cylindrical substrate 13 of the photosensitive drum 1.
[0053]
The present invention is not limited to the above embodiment.
That is, various modifications can be made without departing from the scope of the present invention.
[0054]
FIG. 6 is a principle view showing a mounting method of a vibration isolating member according to another embodiment of the present invention. FIG. 6A is a diagram showing a sheet-like vibration isolating member before being inserted into the photosensitive drum. (A) is a figure which shows the time of insertion of the sheet-like vibration-proof member in the inside of a photosensitive drum, (c) is a figure which shows after insertion of the sheet-like vibration-proof member in the inside of a photosensitive drum.
For example, in the mounting method of the vibration isolating member according to the embodiment of the present invention shown in FIG. 1, the photosensitive drum 1 held by the holder 14 is lowered from above the shaft 3, so The member 2 is mounted in close contact with the inner wall surface of the photosensitive drum 1. In addition, the sheet-like vibration isolating member 2 is positioned and wound around the shaft 3 provided with the air suction / discharge unit 5 with the positioning tool 4. As shown in FIG. 6A, after the sheet-like vibration isolating member 2 is held on the shaft 3 by air suction, the sheet-like vibration isolating member is directly above the photosensitive drum 1 placed on the pallet 16. The shaft 3 holding the member 2 is lowered in the direction of the arrow in FIG. 6A, and the shaft 3 for air-suctioning the sheet-like vibration isolating member 2 is set up on the pallet 16 as shown in FIG. 6B. Of the hollow cylindrical base 13 of the body drum 1 Inserted into, air suction of the shaft 3 Air by stopping air suction from the part 5 or in addition to stopping air suction By discharging air from the discharge unit 5, the sheet-like vibration isolating member 2 is brought into close contact with the inner wall surface of the photoconductive drum 1 by its restoring force, and then the shaft 3 is placed directly above the photoconductive drum 1 on the pallet 16. 6 (c), the shaft 3 is detached from the hollow cylindrical base 13 of the photosensitive drum 1, and as shown in FIG. 6 (c), the sheet-like vibration isolating member 2 is removed. May be attached in close contact with the inner wall surface of the photosensitive drum 1.
[0055]
(Example)
Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited thereto.
Example 1
As the conductive support drum, an aluminum pipe having an outer diameter R of 30 mm, an inner diameter r of 28.4 mm, and a length L of 340 mm was used.
A photosensitive layer is formed on the surface of the aluminum pipe base of the conductive support drum to form the photosensitive drum 1.
Since the method for forming the photosensitive drum 1 is not directly related to the first embodiment, a detailed description thereof will be omitted. However, the surface of the conductive support drum is cut, a charge generation layer containing phthalocyanine, a butadiene compound, and a polycarbonate resin. A charge transport layer made of the above material was formed by coating to produce a photoreceptor drum 1.
[0056]
The sheet-like vibration isolating member 2 has a 25% compressive load of 0 (longitudinal length a = 100 mm when the photosensitive drum is mounted), circumferential length b (58 mm) when the photosensitive drum is mounted, and thickness (m) = 4 mm. .2kg / cm ² Microcell urethane foam (manufactured by INOAC)
LE-20 trademark) was used.
[0057]
The positioning tool 4 has a height of 120 mm and an outer diameter of 26 mm, and the shaft 3 for holding the sheet-like vibration isolating member 2 is made of stainless steel and has an outer diameter d = 19.0 mm.
Further, about 100 holes with a diameter of 2 mm are made from the upper end of the positioning tool 4 of the shaft 3 holding the sheet-like vibration isolating member 2 to a height of 95 mm in the axial direction, and further 2 mm in the circumferential direction on the shaft 3. The air suction / discharge unit 5 was formed by making a part where no hole was made and allowing the gap between the sheet-like vibration isolating members 2 to come to the part.
[0058]
The sheet-like vibration isolating member 2 is applied to the air suction / discharge unit 5 on the shaft 3 so that the edge of the sheet-like vibration isolating member 2 is in close contact with the upper end of the positioning tool 4. Was held on the shaft 3 by air suction.
At that time, if the presence of the sheet-like vibration isolating member 2 can be confirmed by the vibration isolating member confirmation sensor 9, air is automatically sucked.
When the vibration isolating member confirmation sensor 9 confirms that the sheet-like vibration isolating member 2 is held on the shaft 3, the photosensitive drum transport robot 11 is used to attach the sheet-like anti-vibration member 2 to the hollow cylindrical base of the photoconductive drum 1. 13 was inserted inside.
After confirming that the sheet-like vibration isolating member 2 is inserted into the hollow cylindrical substrate 13 of the photosensitive drum 1, the air suction is stopped, so that the sheet-like vibration isolating member 2 is restored to the cylindrical photoconductor by its restoring force. It was possible to adhere to the inner wall surface of the drum 1.
[0059]
Example 2
As the sheet-shaped vibration isolating member 2, a 25% compressive load with a longitudinal length a = 180 mm when the photosensitive drum is mounted, a circumferential length b = 60 mm when the photosensitive drum is mounted, and a thickness m = 2 mm is 0. 4kg / cm ² Using a microcell urethane foam (L-24 trademark manufactured by INOAC) with a height of the positioning tool 4 of 80 mm and an outer diameter d of the shaft 3 of 20 mm so that air can be sucked and discharged. 4mm in the direction makes a part that does not make a hole, the gap of the sheet-like vibration isolating member 2 comes to that part, and the air is discharged, so that the sheet-like vibration isolating member 2 is cylindrical with its restoring force The same operation as in Example 1 was performed except that the inner surface of the photosensitive drum 1 was closely attached.
[0060]
Example 3
The sheet-shaped vibration isolating member 2 has a 25% compressive load of 0.1 mm in the longitudinal length a = 140 mm when the photosensitive drum is mounted, the circumferential length b = 73 mm and the thickness m = 1 mm when the photosensitive drum is mounted. 7kg / cm ² A rubber sponge (trade name: C-4305, manufactured by INOAC) was used, and the height of the positioning tool 4 was 120 mm and the outer diameter d of the shaft 3 was 24 mm.
[0061]
In all of the first to third embodiments, the sheet-like vibration isolating member 2 can be easily and surely inserted and closely attached to the designated position inside the hollow cylindrical base 13 of the photosensitive drum 1, The sheet-like vibration isolating member 2 did not move inside the hollow cylindrical substrate 13 of the photoconductive drum 1 after the vibration isolating member 2 was mounted inside the hollow cylindrical substrate 13 of the photoconductive drum 1. .
[0062]
Comparative Example 1
The same procedure as in Example 1 was performed except that the thickness m of the sheet-shaped vibration-proof member 2 was set to 4.5 mm.
In Comparative Example 1, since it does not fall within the range satisfying r− (d + 2 × m) ≧ 1 in the above formula [1], the photosensitive drum 1 is hollow while the sheet-like vibration isolating member 2 is held on the shaft 3. Since there is no gap of 1 mm or more between the inner diameter of the cylindrical base 13 and the sheet-like vibration isolating member 2, when the sheet-like vibration isolating member 2 is inserted into the hollow cylindrical base 13 of the photosensitive drum 1, The sheet-like vibration isolating member 2 is caught in the end opening 13 a of the hollow cylindrical base 13 of the photosensitive drum 1, and the sheet-like vibration isolating member 2 is smoothly inserted into the hollow cylindrical base 13 of the photosensitive drum 1. In some cases, the sheet-like vibration isolating member 2 is turned over from the shaft 3.
[0063]
Comparative Example 2
This was performed in the same manner as in Example 1 except that the circumferential length b at the time of mounting the sheet-shaped vibration isolating member 2 on the photosensitive drum 1 was 40 mm.
In Comparative Example 2, since it does not fall within the range satisfying π × r / 2 ≦ b of the above formula [2], the mounting of the sheet-like vibration isolating member 2 on the inside of the hollow cylindrical base 13 of the photosensitive drum 1 is Although the sheet-like vibration isolating member 2 could be reliably inserted and adhered to the designated position inside the hollow cylindrical base 13 of the photosensitive drum 1, the sheet-like vibration isolating member 2 and the photosensitive drum 1 are over time. A gap was generated between the sheet-like vibration isolating member 2 and the sheet-like vibration isolating member 2 mounted inside the hollow cylindrical base 13 of the photosensitive drum 1 moved with a slight impact.
[0064]
【The invention's effect】
According to the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member is positioned and wound around the shaft provided with the air suction portion, and the sheet-like anti-vibration member is held by air suction on the shaft. After that, a shaft for air-sucking the sheet-like vibration isolating member is inserted into the hollow cylindrical base of the photosensitive drum, and the air-suction is stopped, so that the sheet-like vibration isolating member uses the restoring force of the photosensitive drum. By using the method of closely contacting the inner wall surface, the sheet-shaped vibration isolating member is placed at a designated position inside the hollow cylindrical substrate of the photosensitive drum without grasping the photosensitive layer on the surface of the hollow cylindrical substrate of the photosensitive drum by hand. It can be easily inserted and attached in close contact.
[0065]
According to the mounting method of the vibration isolating member of the present invention, the sheet-like vibration isolating member is positioned and wound around the shaft provided with the air suction part and the air discharge part, and the sheet-like vibration isolating member is air sucked onto the shaft. Then, the sheet-like vibration isolating member is inserted into the hollow cylindrical base of the photoconductive drum and the air is discharged so that the sheet-like anti-vibration member is restored by its restoring force. By using the method of closely contacting the inner wall surface of the drum, the sheet-shaped vibration isolating member is designated inside the hollow cylindrical substrate of the photosensitive drum without grasping the photosensitive layer on the surface of the hollow cylindrical substrate of the photosensitive drum by hand. It can be mounted in a position simply and securely inserted and in close contact.
[0066]
According to the mounting method of the vibration isolating member of the present invention, after the sheet-like vibration isolating member is positioned and held on the air suction shaft, the sheet-like anti-vibration member is exposed toward the end of the sheet anti-vibration member held on the shaft. By using a method in which the end opening of the hollow cylindrical substrate of the body drum is brought close to the sheet drum and the sheet-shaped vibration damping member is inserted into the hollow cylindrical substrate of the photosensitive drum, The photosensitive drum can be more reliably inserted into the hollow cylindrical base.
[0067]
According to the vibration isolator mounting device of the present invention, an apparatus including a shaft having an air suction portion for holding a sheet-like vibration isolating member and positioning means for positioning the sheet-like vibration isolating member on the shaft is used. By simply winding the sheet-shaped vibration isolating member around the shaft, the air suction part of the shaft air-sucks the sheet-shaped vibration isolating member, so that the sheet-shaped vibration isolating member can be held on the shaft by air suction. Since the positioning means positions the sheet-like vibration isolating member on the shaft, it is possible to insert the sheet-like vibration isolating member which is difficult to attach into the designated position inside the hollow cylindrical base of the photosensitive drum and attach it in close contact. it can.
[0068]
According to the vibration isolator mounting device of the present invention, the photosensitive drum is gripped toward the end of the sheet-like vibration isolator held by the shaft so that the end opening of the hollow cylindrical base of the photoconductor drum approaches. The photosensitive drum transport robot includes a photosensitive drum transport robot that inserts a sheet-shaped vibration isolating member inside the hollow cylindrical base body of the photoconductive drum. Since it is inserted into the cylindrical substrate, it is possible to automate the mounting operation of inserting the sheet-shaped vibration isolating member into the hollow cylindrical substrate of the photosensitive drum using the photosensitive drum transport robot. Therefore, it is possible to greatly improve the efficiency of mounting the sheet-shaped vibration-proof member, which is difficult to mount, on the inside of the hollow cylindrical substrate without gripping the photosensitive layer on the surface of the hollow cylindrical substrate.
[0069]
According to the vibration isolator mounting device of the present invention, the vibration isolator mounting confirmation means for confirming the holding of the sheet vibration isolator on the shaft, and the inside of the hollow cylindrical substrate of the photosensitive drum of the sheet vibration isolator Vibration isolation member insertion confirmation means for confirming insertion into the sheet, so that the vibration isolation member mounting confirmation means confirms the holding of the sheet-shaped vibration isolation member on the shaft, and the vibration isolation member insertion confirmation means Since the insertion of the sheet-shaped vibration isolating member into the hollow cylindrical substrate of the photosensitive drum is confirmed, the sheet-shaped vibration isolating member can be more reliably mounted inside the hollow cylindrical substrate. .
[0070]
According to the vibration isolator mounting device of the present invention, the inner diameter r (mm) of the hollow cylindrical substrate of the photosensitive drum, the circumferential length b (mm) when the photosensitive drum of the sheet vibration isolator is mounted, and the sheet shape The thickness m (mm) of the vibration isolating member and the outer diameter d (mm) of the shaft are in a range satisfying the following formulas [1] and [2].
r− (d + 2 × m) ≧ 1 [1]
π × r / 2 ≦ b [2]
With the sheet-shaped vibration isolating member held on the shaft, there is a gap of 1 mm or more between the inner diameter of the hollow cylindrical base of the photosensitive drum and the sheet-shaped vibration isolating member, and the sheet-shaped vibration isolating member Can be smoothly inserted into the hollow cylindrical substrate of the photosensitive drum. After the sheet-shaped vibration isolating member is inserted into the hollow cylindrical substrate of the photosensitive drum, the sheet-shaped vibration isolating member is It will not move inside the hollow cylindrical substrate of the drum.
[0071]
According to the vibration isolator of the present invention, the 25% compression load is 1 kg / cm. ² By using the following sheet-like viscoelastic material, the vibration-proof member has appropriate flexibility, so that the workability during recycling is improved when the vibration-proof member is attached to the shaft, and a conventional slit is provided. Compared to other anti-vibration members such as a cylindrical anti-vibration member, the material cost is low and good productivity can be secured.
[Brief description of the drawings]
FIG. 1 is a principle view showing a mounting method of a vibration isolating member according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a vibration isolator mounting device according to an embodiment of the present invention.
FIG. 3 is a perspective view showing an example of a sheet-shaped vibration isolating member according to an embodiment of the present invention.
FIG. 4 is a perspective view showing an example of an electrophotographic photosensitive drum of the present invention.
FIG. 5 is a perspective view showing a state before the flange is attached to the electrophotographic photosensitive drum incorporating the sheet-shaped vibration isolating member of the present invention.
FIG. 6 is a principle view showing a mounting method of a vibration isolating member according to another embodiment of the present invention.
[Explanation of symbols]
1 Photosensitive drum (conductive support drum)
2 Sheet-shaped vibration isolator
3 Shaft
4 Positioning tool (positioning means)
5 Air suction / discharge section
6 Air pump
7 Vacuum pump
8 Manifold
9 Anti-vibration member confirmation sensor (vibration-proof member installation confirmation means)
10 Photosensitive drum confirmation sensor (vibration isolation member insertion confirmation means)
11 Photosensitive drum transport robot
12 Flange
13 Hollow cylindrical substrate
13a end opening
14 Holder
15 Vibration isolator mounting device
16 palettes
a Longitudinal length of the sheet-shaped vibration isolator when the photosensitive drum is mounted
b The circumferential length of the sheet-shaped vibration-proof member when the photosensitive drum is mounted
d Shaft outer diameter
m Thickness of sheet-shaped vibration isolator
R The outer diameter of the hollow cylindrical substrate of the photosensitive drum
r Inner diameter of the hollow cylindrical substrate of the photosensitive drum
L Length of the hollow cylindrical substrate of the photosensitive drum

Claims

A method of mounting a sheet-shaped vibration isolating member on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate,
The sheet-like vibration isolating member is positioned and wound around a shaft provided with an air suction portion, and the sheet-like vibration isolating member is held by sucking air to the shaft, and then the sheet-like vibration isolating member is air sucked. The shaft is inserted into the hollow cylindrical base of the photosensitive drum, and the air suction is stopped, so that the sheet-like vibration isolating member comes into close contact with the inner wall surface of the photosensitive drum by its restoring force. How to install the member.

A method of mounting a sheet-shaped vibration isolating member on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate,
The sheet-like vibration isolating member is positioned and wound around a shaft provided with an air suction portion and an air discharge portion, and the sheet-like vibration isolating member is held by sucking air to the shaft. By inserting a shaft for air suction into the hollow cylindrical base of the photosensitive drum and discharging the air in addition to stopping air suction , the sheet-like vibration isolating member is applied to the inner wall surface of the photosensitive drum by its restoring force. A method for mounting a vibration isolating member, wherein the vibration isolating member is closely attached.

Hollow cylinder body of the photosensitive drum toward the end of the previous SL after holding the sheet-like vibration insulating member is positioned before Symbol shaft that air suction, the sheet-like vibration insulating member held by the shaft mounting end to approximate opening, the vibration isolating member according to claim 1 or 2, characterized in that inserting the sheet-like vibration insulating member to a predetermined position of the hollow cylindrical base body portion of the photosensitive drum Method.

An apparatus for mounting a sheet-shaped vibration isolating member on the inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on the surface of a hollow cylindrical substrate,
A shaft having an air suction part for holding the sheet-like vibration isolating member, positioning means for positioning the sheet-like vibration isolating member at a predetermined position on the shaft , and air suction through the air suction part. Thus, the sheet-like vibration isolating member is positioned and held on the shaft, and the air suction means that releases the holding by stopping the air suction, and the sheet-like vibration isolating member is air-suctioned. After positioning and holding on the shaft, the end opening of the hollow cylindrical base of the photosensitive drum is brought close to the end of the sheet-shaped vibration isolating member held on the shaft, and the photosensitive drum proof of claim 1, characterized in that a vibration insulating member insertion means operable to insert said sheet-like vibration insulating member to a predetermined position inside the hollow cylindrical body Vibration isolating member mounting device used directly in the practice of the method of mounting member.

The damping member insertion means, an end opening of the hollow cylinder body of the photosensitive drum by holding the pre-Symbol photosensitive drum toward the end of the previous SL sheet-like vibration insulating member held prior SL shaft 5. The anti-vibration member according to claim 4, wherein the anti-vibration member is a photosensitive drum transport robot that operates to insert the sheet-like anti-vibration member into a hollow cylindrical base of the photosensitive drum. Mounting device.

Verify the vibration isolating member mounting confirmation means for confirming the retention of previous SL shaft, insertion into the hollow cylindrical body of the front Symbol photosensitive drum of the sheet-like vibration insulating member prior Symbol sheet-like vibration insulating member and a vibration isolating member insertion confirmation means for, said a vibration isolating member mounting confirmation means vibration insulating member confirmation sensor, wherein said vibration isolating member insertion confirmation means is characterized by a photosensitive drum confirmation sensor Item 6. The vibration isolator mounting device according to Item 4 or 5.

The inner diameter r (mm) of the hollow cylindrical substrate of the photosensitive drum, the circumferential length b (mm) when the photosensitive drum is mounted on the sheet-shaped vibration isolating member, the thickness m (mm) of the sheet-shaped vibration isolating member, shaft outer diameter d (mm) is a compound represented by the following formula [1], vibration isolating member mounting device according to any one of claims 4 to 6, characterized in that the range that satisfies [2].
r− (d + 2 × m) ≧ 1 [1]
π × r / 2 ≦ b [2]

The sheet-like vibration insulating member, anti-vibration of any crab of claims 1 to 3, characterized in that the 25% compressive load consisting sheet viscoelastic material is 1 kg / cm ² or less Anti-vibration member used directly for the implementation of the member mounting method .