JPH05297779A - Photosensitive drum for image forming device - Google Patents

Photosensitive drum for image forming device

Info

Publication number
JPH05297779A
JPH05297779A JP12262692A JP12262692A JPH05297779A JP H05297779 A JPH05297779 A JP H05297779A JP 12262692 A JP12262692 A JP 12262692A JP 12262692 A JP12262692 A JP 12262692A JP H05297779 A JPH05297779 A JP H05297779A
Authority
JP
Japan
Prior art keywords
bearing member
drum
drive shaft
flange
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12262692A
Other languages
Japanese (ja)
Inventor
Takashi Kanagawa
尚 神奈川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP12262692A priority Critical patent/JPH05297779A/en
Publication of JPH05297779A publication Critical patent/JPH05297779A/en
Pending legal-status Critical Current

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  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

PURPOSE:To easily execute attaching/detaching operation even though the shaft line of a photosensitive drum is not aligned with the shaft of a driving shaft when the photosensitive drum is attached to and detached from the driving shaft, and to prevent backlash in the driving of the drum. CONSTITUTION:The driving shaft 5 is attached to the supporting frame 1 of an electronic copying machine through a bearing 3 on a fixed side, and the photosensitive drum is attached to the driving shaft 5. As to a photosensitive body assembling body 10, a bearing member 20 is attached to the center part of the flange member 15 on the fixed side of a drum member 11, and provided so that it can oscillate with respect to the flange member. Even when the shaft line of the drum is inclined against the driving shaft when the photosensitive body assembling body is attached to and detached from the driving shaft, the bearing member follows to oscillate.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、電子写真方式を用いて
コピーを作成する画像形成装置において、感光体ドラム
のフランジに対して、駆動軸の装着を容易に行い得るよ
うにする装置に関し、特に、感光体ドラムを駆動軸に着
脱する際に、一方のフランジのみが駆動軸に対応する位
置で、軸が噛み込まれたりすることがないようにする機
構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for making a copy by using an electrophotographic method, which makes it possible to easily attach a drive shaft to a flange of a photosensitive drum, In particular, the present invention relates to a mechanism that prevents the shaft from being caught at a position where only one flange corresponds to the drive shaft when the photosensitive drum is attached to or detached from the drive shaft.

【０００２】[0002]

【従来の技術】電子複写機やレーザプリンタ等のよう
に、電子写真方式を用いる画像形成装置においては、画
像担持体として感光体ドラムを用いており、該感光体ド
ラムに対してトナー画像を形成して、そのトナー画像を
用紙に転写する方式を用いている。前記感光体ドラムと
しては、例えば、特開平２−１１５８６１号公報や、実
開昭５５−１０５４４９号公報等に示されるように、ド
ラム部材の両端部にフランジを取り付け、そのフランジ
の中心に設けた軸孔を駆動軸が貫通し、駆動軸を回転さ
せることにより、感光体組立体を一体に駆動するように
構成されたものが用いられている。また、前記ドラム部
材は、一般の感光体ドラムの場合と同様に、アルミ製等
の円筒部材の表面に、感光性を有する物質の層を設けた
もので構成している。2. Description of the Related Art In an image forming apparatus using an electrophotographic system such as an electronic copying machine or a laser printer, a photosensitive drum is used as an image carrier, and a toner image is formed on the photosensitive drum. Then, a method of transferring the toner image onto a sheet is used. As the photosensitive drum, flanges are attached to both ends of a drum member and provided at the center of the flange, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2-1155861 and Japanese Utility Model Laid-Open No. 55-105449. A drive shaft is used which penetrates the shaft hole and rotates the drive shaft to integrally drive the photoconductor assembly. Further, the drum member is formed by providing a layer of a photosensitive substance on the surface of a cylindrical member made of aluminum or the like, as in the case of a general photosensitive drum.

【０００３】前記従来例の感光体組立体は、例えば、図
１０に示されるように構成されている。前記図１０に示
される感光体組立体１０では、ドラム部材１１の両端部
に、フランジ部材１２、１３を、接着または圧入等の手
段を用いて一体に取り付け、前記２つのフランジ部材の
中心部に設けた軸孔１２ａ、１３ａを貫通させるように
して、駆動軸５に支持させている。また、前記駆動軸５
とフランジ部材１２との嵌合部では、駆動軸５から突出
させたピン部材６を、フランジ部材の凹部１４に係合さ
せて、感光体組立体が駆動軸とともに回転するような機
構を構成している。The conventional photoconductor assembly is constructed, for example, as shown in FIG. In the photoconductor assembly 10 shown in FIG. 10, the flange members 12 and 13 are integrally attached to both ends of the drum member 11 by means such as adhesion or press fitting, and the flange members 12 and 13 are attached to the central portions of the two flange members. The drive shaft 5 is supported by penetrating the provided shaft holes 12a and 13a. Also, the drive shaft 5
At the fitting portion between the flange member 12 and the flange member 12, the pin member 6 protruding from the drive shaft 5 is engaged with the recess 14 of the flange member to form a mechanism in which the photoconductor assembly rotates together with the drive shaft. ing.

【０００４】また、画像形成装置の支持フレーム１、２
に対して、ベアリング３、４を各々設けて、該ベアリン
グに対して駆動軸５を回転可能に支持している。そし
て、前記駆動軸５の一端部に、駆動用のギヤ７を設け
て、図示を省略した駆動手段により、感光体ドラムを所
定の周速となるように駆動し、ドラム部材１１の周囲に
トナー画像を形成させるようにしている。また、前記感
光体組立体１０を、支軸５に対して着脱する際には、一
方の支持フレーム２を取り外し、フリーな状態となった
支軸の端部から、感光体組立体１０を引き出すようにす
る。The supporting frames 1, 2 of the image forming apparatus are also provided.
On the other hand, bearings 3 and 4 are provided respectively, and the drive shaft 5 is rotatably supported with respect to the bearings. A drive gear 7 is provided at one end of the drive shaft 5, and the photosensitive drum is driven to a predetermined peripheral speed by a drive unit (not shown), so that the toner is provided around the drum member 11. I am trying to form an image. When the photoconductor assembly 10 is attached to or detached from the support shaft 5, one of the support frames 2 is removed, and the photoconductor assembly 10 is pulled out from the free end of the support shaft. To do so.

【０００５】[0005]

【発明が解決しようとする課題】ところが、前記従来例
に示されたように構成される感光体組立体では、駆動軸
に対して着脱する際に、感光体の一方のフランジが軸に
支持された状態で、該感光体が傾斜した際に、フランジ
部材に設けた軸孔と駆動軸とがカジリを生じてしまい、
着脱作業を容易に行い得ないという問題が発生する。つ
まり、フランジ部材に設ける軸孔は、駆動軸に対してガ
タを生じないように、軸と孔の径の公差を小さくする状
態で組み合わせている。したがって、駆動軸に支持され
る感光体組立体は、駆動軸が回転される際に、振れ等を
生じない状態とされるので、ドラム部材の表面に形成さ
れるトナー画像が、乱れを生じたりすることがないよう
にされる。However, in the photoconductor assembly constructed as shown in the prior art, one flange of the photoconductor is supported by the shaft when the photoconductor assembly is attached to or detached from the drive shaft. In this state, when the photoconductor is tilted, the shaft hole provided in the flange member and the drive shaft will be galled,
There is a problem that the attachment / detachment work cannot be easily performed. That is, the shaft holes provided in the flange member are combined in a state in which the tolerance of the diameters of the shaft and the hole is made small so as to prevent rattling with respect to the drive shaft. Therefore, the photosensitive member assembly supported by the drive shaft is in a state in which the drive shaft is not shaken when the drive shaft is rotated, so that the toner image formed on the surface of the drum member is disturbed. I will not do anything.

【０００６】しかし、前述したようにして、駆動軸に支
持される感光体組立体は、図１１に示されるようにして
着脱する際に、感光体組立体の軸線が駆動軸の軸線に一
致しないと、フランジ部材に設けた軸孔に対して、駆動
軸５がカジリ状態となり、感光体組立体を移動させるこ
とができないという問題が発生する。前述したような現
象は、前記両部材の軸線の傾き角度θが、非常に小さい
角度でも発生することがあるために、メンテナンスに際
して、オペレータが十分に注意しても、高い頻度で発生
するために、メンテナンスの能率を阻害することにな
る。However, as described above, when the photoconductor assembly supported by the drive shaft is attached and detached as shown in FIG. 11, the axis line of the photoconductor assembly does not coincide with the axis line of the drive shaft. Then, the drive shaft 5 is in a stab state with respect to the shaft hole provided in the flange member, which causes a problem that the photoconductor assembly cannot be moved. The phenomenon as described above may occur even at a very small angle of inclination θ of the axes of the both members, and therefore occurs frequently even if the operator pays sufficient attention during maintenance. , It will hinder maintenance efficiency.

【０００７】前述したような問題を防止するためには、
駆動軸とフランジ部材の軸孔との間に、隙間を持たせた
隙間ばめとして組み合わせることが必要となり、実際に
は、そのように軸と孔の径の公差を大きく設定した組み
合わせ方式を用いている。しかしながら、駆動軸とフラ
ンジ部材との支持部に対して、ガタを持たせるような組
み合わせ方式を用いることは、感光体ドラムの回転に際
して、そのドラム部材の軸線が径方向に振れを生じる可
能性を有していることから、ドラム部材に形成されるト
ナー画像にゆがみが発生し、画像の品質に悪影響を与え
ることになる。In order to prevent the above-mentioned problems,
It is necessary to combine them as a clearance fit with a gap between the drive shaft and the shaft hole of the flange member.In practice, use a combination method with a large tolerance of the diameter of the shaft and the hole. ing. However, using a combination method in which the support portion of the drive shaft and the flange member has a backlash may cause the axial line of the drum member to swing radially when the photosensitive drum rotates. Therefore, the toner image formed on the drum member is distorted, which adversely affects the image quality.

【０００８】[0008]

【発明の目的】本発明は、前述したような感光体組立体
の支持方式の問題を解消するもので、フランジ部材と駆
動軸とのはめ合い部に、ガタを持たせない状態で組み合
わせた場合に、支軸に対する着脱性を良好に設定するこ
とができ、駆動効率を良好に維持できるような装置を提
供することを目的としている。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem of the support system of the photoconductor assembly, and in the case where the flange member and the drive shaft are combined in a mating state without backlash. In addition, it is an object of the present invention to provide a device capable of favorably setting the attachment / detachment property with respect to the support shaft and maintaining good drive efficiency.

【０００９】[0009]

【課題を解決するための手段および作用】本発明は、円
筒状に形成したドラム部材に対して、その両端部にフラ
ンジ部材を配置して感光体組立体を構成し、前記フラン
ジ部材の中心部に設けた軸孔に駆動軸を貫通させて、感
光体組立体を駆動するように構成してなる感光体ドラム
に関する。本発明の感光体ドラムにおいては、前記ドラ
ム部材の一方に配置するフランジ部材の中央部に挿入孔
を形成し、該挿入孔の内面の曲面に一致する外周形状を
有する軸受部材を嵌合し、該軸受部材はフランジ部材に
対して軸に直角な方向に揺動可能に支持させ、前記軸受
部材の中央部に軸孔を設けて、駆動軸を貫通させるよう
に構成し、前記軸受部材を貫通する駆動軸と、ドラム部
材の軸心とを一致させた状態で、駆動軸に対して感光体
組立体を装着できるような自動調心機構を構成してい
る。SUMMARY OF THE INVENTION According to the present invention, a photosensitive member assembly is constructed by disposing flange members at both ends of a drum member formed in a cylindrical shape, and a central portion of the flange member. The present invention relates to a photoconductor drum configured to drive a photoconductor assembly by penetrating a drive shaft through a shaft hole provided in. In the photoconductor drum of the present invention, an insertion hole is formed in the center of the flange member arranged on one of the drum members, and a bearing member having an outer peripheral shape that matches the curved surface of the inner surface of the insertion hole is fitted, The bearing member is supported so as to be swingable in a direction perpendicular to the shaft with respect to the flange member, and a shaft hole is provided in the central portion of the bearing member so as to penetrate the drive shaft. The self-aligning mechanism is configured so that the photoconductor assembly can be mounted on the drive shaft in a state where the drive shaft and the shaft center of the drum member are aligned with each other.

【００１０】また、本発明の感光体ドラムでは、前記軸
受部材の外周面に突条を突出させて設け、フランジ部材
の挿入孔には突条に対応する凹部を配置し、フランジ部
材に軸受部材を支持させた状態で、前記突条が凹部に係
合するように組み合わせ、フランジ部材と軸受部材とを
一体に回転させる機構を構成することができる。さら
に、本発明においては、軸受部材の外側の周囲に凸部材
を突出させて形成し、該凸部材をフランジ部材の外側の
面に当接させることにより、軸受部材の軸に直角な方向
への揺動を規制することができる。Further, in the photoconductor drum of the present invention, a protrusion is provided on the outer peripheral surface of the bearing member, and a recess corresponding to the protrusion is disposed in the insertion hole of the flange member, and the bearing member is provided on the flange member. It is possible to construct a mechanism for integrally rotating the flange member and the bearing member by combining the protrusions so as to engage with the recesses in a state where the flange members are supported. Further, in the present invention, a convex member is formed so as to project around the outer periphery of the bearing member, and the convex member is brought into contact with the outer surface of the flange member, whereby a direction perpendicular to the axis of the bearing member is obtained. Oscillation can be restricted.

【００１１】前述したように、感光体組立体のフランジ
部材に対して軸受部材を配置し、該軸受部材がフランジ
部材に対して軸に直角な方向に揺動可能に設けることに
より、感光体組立体を駆動軸から外したりする動作を容
易に行うことができる。つまり、感光体組立体を駆動軸
に対して着脱する際に、両部材の軸線が傾斜しても、軸
受部材が駆動軸に対して傾斜することがなくなり、軸受
部材の軸孔が駆動軸に対してカジリ状態等が生じること
がなくなる。したがって、感光体組立体を複写機本体か
ら着脱する作業を容易に行うことができ、メンテナンス
の作業効率を良好に設定させることができる。そして、
フランジ部材の駆動軸に対する支持部にガタ等が形成さ
れないことにより、感光体ドラムに対する駆動を良好に
行うことができ、コピーの画質を良好に維持することが
できる。As described above, the bearing member is arranged with respect to the flange member of the photoconductor assembly, and the bearing member is provided so as to be swingable in the direction perpendicular to the axis with respect to the flange member. It is possible to easily perform the operation of removing the solid body from the drive shaft. That is, when the photoconductor assembly is attached to or detached from the drive shaft, even if the axes of both members are inclined, the bearing member is not inclined with respect to the drive shaft, and the shaft hole of the bearing member becomes the drive shaft. On the other hand, there will be no galling or the like. Therefore, the work of attaching and detaching the photoconductor assembly to and from the main body of the copying machine can be easily performed, and the work efficiency of maintenance can be set favorably. And
Since no play is formed on the support portion of the flange member for the drive shaft, the photosensitive drum can be driven favorably and the image quality of the copy can be favorably maintained.

【００１２】[0012]

【実施例】図示される例にしたがって、本発明の画像形
成装置の感光体ドラムの構成を説明する。本発明の感光
体組立体１０は、図１に示されるように、ドラム部材１
１の一方の端部に配置されるフランジ部材１５に対し
て、その中央部に軸受部材２０を設けている。前記フラ
ンジ部材１５は、従来例で示した図１０の感光体ドラム
の場合と同様に、感光体としてのドラム部材１１の端部
に、接着または圧入等の手段を用いて一体に取り付けて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the photosensitive drum of the image forming apparatus of the present invention will be described with reference to the illustrated example. The photoreceptor assembly 10 of the present invention, as shown in FIG.
The bearing member 20 is provided in the center of the flange member 15 arranged at one end of the first member. The flange member 15 is integrally attached to the end portion of the drum member 11 as a photoconductor by means such as adhesion or press-fitting, as in the case of the photoconductor drum of FIG. 10 shown in the conventional example.

【００１３】そして、前記感光体組立体を装置本体から
着脱する際の固定フレーム側のフランジ部材を、図１に
示すように構成し、ドラム部材の他方の端部に配置する
フランジ部材は、従来例の場合と同様な構成のものを用
いる場合で示している。なお、前述したように、フラン
ジ部材１５に対して揺動（首振り）可能に設けた軸受部
材２０は、駆動軸とフランジ部材との双方に対して、余
分に揺動することを防ぐ手段を介して取り付けられるも
のであり、その揺動方向の自由度を規制する手段として
は、任意の機構を用いることができる。A flange member on the fixed frame side when the photosensitive member assembly is attached to and detached from the main assembly of the apparatus is constructed as shown in FIG. 1, and the flange member arranged at the other end of the drum member is a conventional one. The case where the same structure as that of the example is used is shown. In addition, as described above, the bearing member 20 provided so as to be capable of swinging (swinging) with respect to the flange member 15 has means for preventing excessive swinging with respect to both the drive shaft and the flange member. Any mechanism can be used as a means for restricting the degree of freedom in the swinging direction.

【００１４】前記フランジ部材１５の中央部に配置する
軸受部材２０に対して、フランジ部材１５には挿入孔１
６を設けており、該挿入孔１６はその内面を凹の球面の
孔として構成する。また、前記挿入孔１６の内面は、フ
ランジ部材１５の幅方向の中央部と、回転軸の交点Ｏを
中心にして、半径Ｒの球面として形成される。前記フラ
ンジ部材１５の挿入孔１６に嵌合される軸受部材２０
は、挿入孔１６の内周面と同一直径の凸の球面として外
周面２２を形成し、中心部に軸孔２１を設けている。な
お、前記フランジ部材１５の中央部に装着した軸受部材
２０は、挿入孔１６に対して支点Ｏを中心にして回転と
揺動できるように支持される。また、前記軸受部材２０
は、フランジ部材１５の挿入孔１６に対して、圧入やそ
の他の手段を用いて装着することができる。本発明のフ
ランジ部材に対して、軸受け部材を取り付ける際には、
一般の球面軸受けの場合と同様に、フランジ部材を厚さ
方向に２分割したものを組み合わせること等の任意の手
段を用いることができる。With respect to the bearing member 20 arranged in the central portion of the flange member 15, the insertion hole 1 is formed in the flange member 15.
6 is provided, and the inner surface of the insertion hole 16 is formed as a concave spherical hole. Further, the inner surface of the insertion hole 16 is formed as a spherical surface having a radius R centering on the intersection O of the rotation axis and the center of the flange member 15 in the width direction. Bearing member 20 fitted in the insertion hole 16 of the flange member 15
Forms an outer peripheral surface 22 as a convex spherical surface having the same diameter as the inner peripheral surface of the insertion hole 16, and has a shaft hole 21 in the center. The bearing member 20 mounted on the central portion of the flange member 15 is supported with respect to the insertion hole 16 so as to be rotatable and swingable about a fulcrum O. In addition, the bearing member 20
Can be attached to the insertion hole 16 of the flange member 15 by press fitting or other means. When attaching the bearing member to the flange member of the present invention,
As in the case of a general spherical bearing, any means such as combining flange members divided into two in the thickness direction can be used.

【００１５】前記図１に示される感光体組立体１０は、
複写機本体の画像形成部に着脱する際に、図２に示され
るようにして行われる。前記図２に示される例におい
て、固定側の支持フレーム１には、ベアリング３を介し
て駆動軸５を支持しており、該駆動軸５に対して駆動ギ
ヤ７を配置したものとして構成している。また、駆動軸
５の他方の端部を支持するフレームとベアリングとは、
感光体組立体を着脱する際に、取り外しが可能な状態に
設けており、図示される例では、他方の支持フレームを
外した状態で示している。The photoreceptor assembly 10 shown in FIG.
When attaching to and detaching from the image forming unit of the main body of the copying machine, this is performed as shown in FIG. In the example shown in FIG. 2, the fixed side support frame 1 supports the drive shaft 5 via the bearing 3, and the drive gear 7 is arranged on the drive shaft 5. There is. Further, the frame and the bearing that support the other end of the drive shaft 5 are
The photoconductor assembly is provided so that it can be detached when the photoconductor assembly is attached and detached. In the example shown, the other support frame is shown as removed.

【００１６】前記図２に示される例において、感光体組
立体１０の一方のフランジ部材１３を、駆動軸５から抜
き出した状態で、駆動軸に対して他方のフランジ部材１
５が係合している。図示される状態で、駆動軸に対して
フランジ部材１５が傾斜した場合に、該軸５が貫通する
軸受部材２０は、軸とともにフランジ部材１５に対して
揺動するので、軸５と軸受部材２０の軸孔とは常に平行
な状態を維持できる。そして、図示されるように、感光
体組立体１０の軸線が駆動軸５に対して傾いた状態で、
感光体組立体を軸に着脱する動作を行っても、駆動軸と
軸孔との間でカジリ等のような現象が発生せず、感光体
組立体の着脱の作業を容易に行うことができる。したが
って、軸受部材に設ける軸孔２１に、駆動軸をはめ合う
際に、そのはめ合い公差をきつくしても、スムーズな着
脱の動作を行うことが可能になり、駆動軸に対して感光
体組立体がガタのない状態で取り付けられるので、感光
体組立体の回転を良好な状態に設定することが可能にな
る。In the example shown in FIG. 2, one flange member 13 of the photoconductor assembly 10 is pulled out from the drive shaft 5 and the other flange member 1 is attached to the drive shaft.
5 is engaged. In the illustrated state, when the flange member 15 is tilted with respect to the drive shaft, the bearing member 20 through which the shaft 5 penetrates rocks with respect to the flange member 15, so that the shaft 5 and the bearing member 20. It is possible to always maintain a parallel state with the shaft hole of. Then, as shown in the figure, with the axis of the photoconductor assembly 10 tilted with respect to the drive shaft 5,
Even if the photoconductor assembly is attached to or detached from the shaft, a phenomenon such as galling does not occur between the drive shaft and the shaft hole, and the work of attaching or detaching the photoconductor assembly can be easily performed. .. Therefore, when the drive shaft is fitted in the shaft hole 21 provided in the bearing member, even if the fitting tolerance is tight, it is possible to perform the smooth attachment / detachment operation, and the photoconductor assembly is attached to the drive shaft. Since the three-dimensional body is attached without play, it is possible to set the rotation of the photoconductor assembly in a good state.

【００１７】本発明のフランジ部材に対して設ける軸受
部材は、図３に示されるように構成することもできる。
図３に示される軸受部材では、前記図１に示された軸受
部材２０の場合と同様に形成されているものであり、そ
の外周部の側部に凸部材２４を突出させて設けている。
この実施例に示される軸受部材では、フランジ部材１５
よりも厚いものとして構成しており、軸受部材２０をフ
ランジ部材１５に装着した際に、軸受部材２０がフラン
ジ部材の外側に突出する状態に設けている。そして、前
記軸受部材の外側に突出した部分の外周部に、環状の凸
部材２４を設けて、軸受部材の揺動角度を規制すること
ができるようにしている。The bearing member provided for the flange member of the present invention can also be constructed as shown in FIG.
The bearing member shown in FIG. 3 is formed similarly to the case of the bearing member 20 shown in FIG. 1, and the convex member 24 is provided so as to project on the side portion of the outer peripheral portion thereof.
In the bearing member shown in this embodiment, the flange member 15
The bearing member 20 is provided so as to project to the outside of the flange member when the bearing member 20 is mounted on the flange member 15. Then, an annular convex member 24 is provided on the outer peripheral portion of the portion projecting to the outside of the bearing member so that the swing angle of the bearing member can be regulated.

【００１８】前記図３に示されるように、外周部の外側
に凸部材２４を突出させて設けたことにより、本発明の
フランジ部材では、図４および図５に示されるように、
感光体組立体１０が駆動軸の軸線に対して、角度θだけ
傾斜させるように規制することができる。前記傾斜の規
制角度θは、比較的小さい角度で良く、オペレータが感
光体組立体を着脱する際に、２〜５°程度傾斜させる余
裕があれば、駆動軸に対して感光体組立体を容易に着脱
させることが可能になる。したがって、前記図４、５に
示されるように、感光体組立体を駆動軸に対して若干だ
け傾斜させることができる程度に、軸受部材２０に設け
た凸部材を配置することによって、感光体組立体の取り
扱いの作業性を向上させることができる。As shown in FIG. 3, since the convex member 24 is provided so as to project to the outside of the outer peripheral portion, in the flange member of the present invention, as shown in FIG. 4 and FIG.
The photoconductor assembly 10 can be regulated so as to be inclined by an angle θ with respect to the axis of the drive shaft. The inclination regulation angle θ may be a relatively small angle, and when the operator has a margin to incline about 2 to 5 ° when attaching and detaching the photoconductor assembly, the photoconductor assembly can be easily mounted on the drive shaft. It can be attached to and detached from. Therefore, as shown in FIGS. 4 and 5, by disposing the convex member provided on the bearing member 20 to such an extent that the photosensitive member assembly can be slightly tilted with respect to the drive shaft, It is possible to improve workability in handling a three-dimensional object.

【００１９】本発明の感光体組立体では、前述したよう
に、フランジ部材の中央部に軸受部材２０を首振り可能
に設けることに加えて、駆動軸と軸受部材、および、軸
受部材とフランジ部材との間で、駆動力を伝達するため
の手段を設けることができる。図６および図７に示され
る本発明の別の実施例では、感光体組立体１０を構成す
るドラム部材１１の一方の端部に配置するフランジ部材
１５に対して、軸受部材２０を配置することは、前記各
実施例の場合と同様に構成される。前記図６および図７
に示される例では、前記軸受部材２０の外周部に突条２
３を突出させて設けており、フランジ部材１５の内面に
は、凹部１７を設けている。なお、前記凹部１７の幅を
突条に対して大きく設定する場合に、軸受け部材の傾斜
機能を損なわない程度のガタを持たせることが必要であ
る。そして、フランジ部材１５の挿入孔１６に対して、
軸受部材２０を挿入する際に、凹部１７に対して突条２
３を係合させることにより、両部材が軸の周囲に一体に
回転させるようにする。In the photoconductor assembly of the present invention, as described above, in addition to the bearing member 20 being swingably provided in the central portion of the flange member, the drive shaft and the bearing member, and the bearing member and the flange member are provided. Means may be provided for transmitting the driving force between and. In another embodiment of the present invention shown in FIGS. 6 and 7, the bearing member 20 is arranged with respect to the flange member 15 arranged at one end of the drum member 11 constituting the photoconductor assembly 10. Is constructed in the same manner as in each of the above embodiments. 6 and 7
In the example shown in FIG.
3 is provided so as to project, and a recess 17 is provided on the inner surface of the flange member 15. When the width of the recess 17 is set larger than that of the ridge, it is necessary to provide a play that does not impair the tilting function of the bearing member. Then, with respect to the insertion hole 16 of the flange member 15,
When inserting the bearing member 20, the protrusion 2
Engaging 3 causes both members to rotate integrally around the shaft.

【００２０】前記軸受部材２０と駆動軸５との間にも、
係止機構を設けている。前記係止機構は、駆動軸５に突
出させるピン部材６と、軸受部材２０の軸孔に設ける凹
部２５とから構成される。そして、感光体組立体１０を
駆動軸に沿って装着する際に、該感光体組立体の固定位
置にピン部材６を配置し、軸受部材の凹部２５が、前記
ピン部材に係止される状態で、感光体組立体１０を固定
保持させる。したがって、駆動軸５の回転は、ピン部材
６と凹部２５との係合部を介して軸受部材２０に伝達さ
れ、軸受部材２０とフランジ部材１５とは、突条２３と
凹部１７との間で駆動力が伝達されることになる。Also between the bearing member 20 and the drive shaft 5,
A locking mechanism is provided. The locking mechanism includes a pin member 6 protruding from the drive shaft 5 and a recess 25 provided in a shaft hole of the bearing member 20. When the photoconductor assembly 10 is mounted along the drive shaft, the pin member 6 is arranged at a fixed position of the photoconductor assembly, and the recess 25 of the bearing member is locked to the pin member. Then, the photoconductor assembly 10 is fixedly held. Therefore, the rotation of the drive shaft 5 is transmitted to the bearing member 20 via the engaging portion between the pin member 6 and the recess 25, and the bearing member 20 and the flange member 15 are disposed between the protrusion 23 and the recess 17. The driving force will be transmitted.

【００２１】なお、前記図６に示される軸受部材２０
は、図８の側面図、および図９の背面図にそれぞれ示さ
れるように構成される。つまり、軸受部材２０の外周面
は、側面視で所定の半径の円弧状に形成されているもの
であり、その外周の一部に突条２３を突出させて設けて
いる。さらに、軸受部材２０の外周部の外側の端部に
は、環状の凸部材２４を突出させて設け、軸受部材２０
がフランジ部材に対して首振りの動作を行う際に、その
首振りの角度を規制できるようにしている。したがっ
て、前記図８、９に示されるように、フランジ部材に対
して装着する軸受部材を、自動調心機構と同様な組み合
わせの部材で構成することにより、軸受部材に設けた軸
孔に貫通する駆動軸に対して、感光体組立体の軸線が傾
斜した状態でも、感光体組立体の取り扱いを容易に行う
ことができる。The bearing member 20 shown in FIG.
Are configured as shown in the side view of FIG. 8 and the rear view of FIG. 9, respectively. That is, the outer peripheral surface of the bearing member 20 is formed in an arc shape having a predetermined radius in a side view, and the protrusion 23 is provided so as to protrude from a part of the outer periphery thereof. Further, an annular convex member 24 is provided so as to project at the outer end portion of the outer peripheral portion of the bearing member 20.
When the swinging operation is performed on the flange member, the swinging angle can be regulated. Therefore, as shown in FIGS. 8 and 9, by configuring the bearing member to be mounted on the flange member with a member having a combination similar to that of the self-aligning mechanism, the bearing member penetrates the shaft hole provided in the bearing member. Even when the axis of the photoconductor assembly is inclined with respect to the drive shaft, the photoconductor assembly can be easily handled.

【００２２】なお、前記本発明の実施例において、ドラ
ム部材の両端部に配置するフランジ部材の固定手段は、
圧入または接着等の他に、任意の固定手段を用いること
ができるものであり、従来の感光体ドラムの場合と同様
に、感光体ドラムを構成することができる。また、固定
フレーム側に対応するフランジ部材に対してのみ、首振
り可能な軸受部材を配置し、該軸受部材に対して揺動
（首振り）角度を規制する手段を配置する場合にも、そ
の規制手段は図示されたもの以外に、任意の機構のもの
を用いることができる。さらに、前記フランジ部材と軸
受部材とは、金属またはプラスチック材料を用いて構成
することが可能であり、両部材の材質がことなるもので
あっても良い。前記構成に加えて、本発明の感光体組立
体では、フランジ部材に対して軸受部材を取り付ける手
段として、圧入またはその他の任意の手段を用いること
ができる。In the embodiment of the present invention, the fixing means for the flange members arranged at both ends of the drum member are:
In addition to press-fitting or adhesion, any fixing means can be used, and the photosensitive drum can be configured as in the case of the conventional photosensitive drum. Also, when the swingable bearing member is arranged only for the flange member corresponding to the fixed frame side and the means for restricting the swing (swing) angle is arranged for the bearing member, The regulating means may be of any mechanism other than the one shown. Furthermore, the flange member and the bearing member can be made of metal or plastic material, and the materials of both members may be different. In addition to the above configuration, in the photoconductor assembly of the present invention, press fitting or any other means can be used as a means for attaching the bearing member to the flange member.

【００２３】[0023]

【発明の効果】本発明の画像形成装置の感光体ドラム
は、前述したように、感光体組立体のフランジ部材に対
して軸受部材を配置し、該軸受部材がフランジ部材に対
して軸に直角な方向に揺動可能に設けたものであるか
ら、感光体組立体を駆動軸から外したりする動作を容易
に行うことができる。つまり、感光体組立体を駆動軸に
対して着脱する際に、両部材の軸線が傾斜しても、軸受
部材が駆動軸に対して傾斜することがなくなり、軸受部
材の軸孔が駆動軸に対してカジリ状態等が生じることが
なくなる。したがって、感光体組立体を複写機本体から
着脱する作業を容易に行うことができ、メンテナンスの
作業効率を良好に設定させることができる。そして、フ
ランジ部材の駆動軸に対する支持部にガタ等が形成され
ないことにより、感光体ドラムに対する駆動を良好に行
うことができ、コピーの画質を良好に維持することがで
きる。As described above, in the photoconductor drum of the image forming apparatus of the present invention, the bearing member is arranged with respect to the flange member of the photoconductor assembly, and the bearing member is perpendicular to the shaft with respect to the flange member. Since it is provided so as to be swingable in various directions, it is possible to easily perform the operation of removing the photoconductor assembly from the drive shaft. That is, when the photoconductor assembly is attached to or detached from the drive shaft, even if the axes of both members are inclined, the bearing member is not inclined with respect to the drive shaft, and the shaft hole of the bearing member becomes the drive shaft. On the other hand, there will be no galling or the like. Therefore, the work of attaching and detaching the photoconductor assembly to and from the main body of the copying machine can be easily performed, and the work efficiency of maintenance can be set favorably. Further, since no play is formed on the support portion of the flange member for the drive shaft, the drive of the photosensitive drum can be favorably performed, and the image quality of the copy can be favorably maintained.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明の感光体組立体の構成を示す断面図で
ある。FIG. 1 is a cross-sectional view showing a configuration of a photoconductor assembly of the present invention.

【図２】 本発明の感光体組立体を駆動軸に取り付ける
状態の説明図である。FIG. 2 is an explanatory view showing a state in which the photoconductor assembly of the present invention is attached to a drive shaft.

【図３】 フランジ部材を設ける軸受部材の構成を示す
断面図である。FIG. 3 is a cross-sectional view showing a configuration of a bearing member provided with a flange member.

【図４】 感光体組立体を駆動軸に対して傾斜させた状
態の説明図である。FIG. 4 is an explanatory diagram of a state in which the photoconductor assembly is tilted with respect to the drive shaft.

【図５】 感光体組立体を駆動軸に対して他方に傾斜さ
せた状態の説明図である。FIG. 5 is an explanatory diagram of a state in which the photoconductor assembly is tilted to the other side with respect to the drive shaft.

【図６】 本発明の軸受部材の別の構成を示す断面図で
ある。FIG. 6 is a cross-sectional view showing another configuration of the bearing member of the present invention.

【図７】 図６に示される軸受部材の正面図である。FIG. 7 is a front view of the bearing member shown in FIG.

【図８】 図６に示される軸受部材の側面図である。FIG. 8 is a side view of the bearing member shown in FIG.

【図９】 図８に示される軸受部材の背面図である。9 is a rear view of the bearing member shown in FIG.

【図１０】 従来の感光体ドラムの構成を示す断面図で
ある。FIG. 10 is a sectional view showing a configuration of a conventional photosensitive drum.

【図１１】 従来の感光体ドラムの着脱状態を示す説明
図である。FIG. 11 is an explanatory diagram showing a detached state of a conventional photosensitive drum.

【符号の説明】[Explanation of symbols]

１ 支持フレーム、 ５ 駆動軸、 ６ ピン部
材、１０ 感光体組立体、 １１ ドラム部材、１
２・１３・１５ フランジ部材、 １６ 挿入孔、
１７ 凹部、２０ 軸受部材、 ２１ 軸孔、
２２ 外周面、 ２３ 突条、２４ 凸部材、
２５ 凹部。1 Support Frame, 5 Drive Shaft, 6 Pin Member, 10 Photosensitive Body Assembly, 11 Drum Member, 1
2.13.15 flange member, 16 insertion holes,
17 recesses, 20 bearing members, 21 shaft holes,
22 outer peripheral surface, 23 ridges, 24 convex members,
25 recess.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 円筒状に形成したドラム部材に対して、
その両端部にフランジ部材を配置して感光体組立体を構
成し、前記フランジ部材の中心部に設けた軸孔に駆動軸
を貫通させて、感光体組立体を駆動するように構成して
なる感光体ドラムにおいて、 前記ドラム部材の一方に配置するフランジ部材の中央部
に挿入孔を形成し、該挿入孔の内面の球面に一致する外
周形状を有する軸受部材を嵌合し、該軸受部材はフラン
ジ部材に対して軸に直角な方向に揺動可能に支持させ、 前記軸受部材の中央部に軸孔を設けて、駆動軸を貫通さ
せるように構成し、 前記軸受部材を貫通する駆動軸と、ドラム部材の軸心と
を一致させた状態で、駆動軸に対して感光体組立体を装
着できるような自動調心機構を構成することを特徴とす
る画像形成装置の感光体ドラム。1. A drum member formed into a cylindrical shape,
Flange members are arranged at both ends to form a photoconductor assembly, and the drive shaft is passed through a shaft hole provided in the center of the flange member to drive the photoconductor assembly. In the photoconductor drum, an insertion hole is formed in the center of a flange member arranged on one side of the drum member, and a bearing member having an outer peripheral shape that matches the spherical surface of the inner surface of the insertion hole is fitted, and the bearing member is A flange member is swingably supported in a direction perpendicular to the shaft, a shaft hole is provided in the center of the bearing member, and the drive shaft is configured to penetrate therethrough. A photosensitive drum of an image forming apparatus, comprising an automatic centering mechanism capable of mounting a photosensitive body assembly on a drive shaft in a state where an axial center of a drum member is matched. 【請求項２】 前記軸受部材の外周面に突条を突出させ
て設け、フランジ部材の挿入孔には突条に対応する凹部
を配置し、 フランジ部材に軸受部材を支持させた状態で、前記突条
が凹部に係合するように組み合わせ、フランジ部材と軸
受部材とを一体に回転させる機構を構成することを特徴
とする請求項１に記載の画像形成装置の感光体ドラム。2. A protrusion is provided on the outer peripheral surface of the bearing member, a recess corresponding to the protrusion is disposed in the insertion hole of the flange member, and the bearing member is supported by the flange member. 2. The photoconductor drum of the image forming apparatus according to claim 1, wherein the protrusions are combined so as to engage with the recesses to form a mechanism for integrally rotating the flange member and the bearing member. 【請求項３】 軸受部材の外側の周囲に凸部材を突出さ
せて形成し、該凸部材をフランジ部材の外側の面に当接
させることにより、軸受部材の軸に直角な方向への揺動
を規制することを特徴とする請求項１または請求項２に
記載の画像形成装置の感光体ドラム。3. A swing member in a direction perpendicular to the axis of the bearing member by projecting a convex member around the outside of the bearing member and abutting the convex member on the outer surface of the flange member. The photosensitive drum of the image forming apparatus according to claim 1, wherein the photosensitive drum is regulated.
JP12262692A 1992-04-16 1992-04-16 Photosensitive drum for image forming device Pending JPH05297779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12262692A JPH05297779A (en) 1992-04-16 1992-04-16 Photosensitive drum for image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12262692A JPH05297779A (en) 1992-04-16 1992-04-16 Photosensitive drum for image forming device

Publications (1)

Publication Number Publication Date
JPH05297779A true JPH05297779A (en) 1993-11-12

Family

ID=14840625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12262692A Pending JPH05297779A (en) 1992-04-16 1992-04-16 Photosensitive drum for image forming device

Country Status (1)

Country Link
JP (1) JPH05297779A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016180774A (en) * 2015-03-23 2016-10-13 富士ゼロックス株式会社 Charging device and image formation device using the same
CN112698561A (en) * 2011-12-06 2021-04-23 佳能株式会社 Cartridge, photosensitive drum transmission device assembling method and electronic photographic imaging equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112698561A (en) * 2011-12-06 2021-04-23 佳能株式会社 Cartridge, photosensitive drum transmission device assembling method and electronic photographic imaging equipment
CN112698561B (en) * 2011-12-06 2023-11-28 佳能株式会社 Cartridge, method of assembling photosensitive drum driving device, and electrophotographic image forming apparatus
JP2016180774A (en) * 2015-03-23 2016-10-13 富士ゼロックス株式会社 Charging device and image formation device using the same

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