JPH0764449A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0764449A JPH0764449A JP22945893A JP22945893A JPH0764449A JP H0764449 A JPH0764449 A JP H0764449A JP 22945893 A JP22945893 A JP 22945893A JP 22945893 A JP22945893 A JP 22945893A JP H0764449 A JPH0764449 A JP H0764449A
- Authority
- JP
- Japan
- Prior art keywords
- driving
- drive
- image forming
- rotary shaft
- connecting member
- 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.)
- Granted
Links
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は画像形成装置に関し、詳
しくは複写機、ファクシミリ、レーザプリンタ等の感光
体を回転駆動して画像形成を行う画像形成装置の改良に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly, to an improvement of an image forming apparatus such as a copying machine, a facsimile, a laser printer, etc., for rotationally driving a photosensitive member to form an image.
【０００２】[0002]
【従来の技術】図１０は従来の画像形成装置の概略構成
説明図であり、一般的な画像形成装置の記録部の一例
で、ベルト状の感光体１０３は、テンションローラ１１
１、従動ローラ１１２、駆動ローラ１０４に巻き掛けら
れて張設され、図示矢印Ａ方向に循環移動されて画像形
成が行なわれるようになっている。まず、感光体１０３
は、除電ランプ１１３により除電された後、帯電ユニッ
ト１１４により一様に帯電され、光書き込みユニット１
１５による露光で静電潜像の形成を受ける。次いで、現
像ローラ１１６により現像され、転写ユニット１１７に
おいて、別途送りこまれた記録紙１１８にトナー像が転
写される。トナー像が転写された記録紙１１８は定着ロ
ーラ１１９により定着された後、コピーとして排出され
る。2. Description of the Related Art FIG. 10 is a schematic structural explanatory view of a conventional image forming apparatus, which is an example of a recording section of a general image forming apparatus.
1, the driven roller 112 and the drive roller 104 are wound around and stretched, and are circularly moved in the direction of arrow A in the drawing to form an image. First, the photoconductor 103
Is discharged by the discharging lamp 113, and then uniformly charged by the charging unit 114.
The exposure by 15 receives the formation of an electrostatic latent image. Next, the toner image is developed by the developing roller 116, and in the transfer unit 117, the toner image is transferred to the recording paper 118 fed separately. The recording paper 118 to which the toner image is transferred is fixed by the fixing roller 119, and then discharged as a copy.
【０００３】図１１は上記従来例におけるベルト状感光
体の駆動機構を示す斜視図であり、従来の駆動源１０１
からの駆動力は、モータである駆動源１０１の出力軸１
０１ａとプーリ１０５ａ間に張設されたタイミングベル
ト１１０によって画像形成装置に一体的に設けられた駆
動ギア群１２０を介して、感光体１０３を回転駆動する
駆動ローラ１０４に伝達されて感光体１０３を回転駆動
していた（特開昭６４ー５２１７０号公報を参照）。即
ち、感光体１０３を回転駆動する駆動ギア１２０は画像
形成装置に組み込まれているから、感光体１０３を回転
駆動する駆動ローラ１０４と駆動ギア１２０の軸芯合わ
せが困難であった。この軸芯合わせが不充分であると、
感光体１０３の回転ムラを増大させて、形成される画像
にジター等を発生させて画像品質を低下させる虞れが高
かった。FIG. 11 is a perspective view showing a drive mechanism for a belt-shaped photosensitive member in the above-mentioned conventional example, and a conventional drive source 101.
From the output shaft 1 of the drive source 101, which is a motor.
01a and the pulley 105a, the timing belt 110 is stretched between the drive belt 104 and the drive gear group 120 integrally provided in the image forming apparatus. It was rotationally driven (see Japanese Patent Laid-Open No. 64-52170). That is, since the drive gear 120 that rotationally drives the photoconductor 103 is incorporated into the image forming apparatus, it is difficult to align the drive roller 104 that rotationally drives the photoconductor 103 with the drive gear 120. If this axis alignment is insufficient,
There is a high possibility that the rotation unevenness of the photoconductor 103 may be increased to cause a jitter or the like in the formed image to deteriorate the image quality.
【０００４】その為の解決策として、感光体ドラムの中
心軸を駆動筒軸の軸穴内に嵌入して軸受させて、感光体
ドラムの軸線とモータ出力軸の軸線を一致させようとす
る画像形成装置（特開平２ー２８２２７１号の公報を参
照）、感光体の駆動軸を振動吸収材を介して回転体（駆
動源）に連結する複写機の感光体駆動装置（実開昭６０
ー６３８６９号の公報を参照）、回転軸と駆動系の間に
感光体の着脱切離し自在なカップリングを設け、このカ
ップリングの一方の爪体接触面に緩衝部材を設けた電子
複写機の感光体駆動装置（特開昭５９ー２２８２８１号
の公報を参照）、フラットモータのマグネットロータが
感光体ドラムの支軸に直結した電子写真感光体ドラムの
回転方法（特開平２ー２０８６６８号の公報を参照）、
ドラム状画像形成部材がフライホイールや振動減衰部材
を介して駆動体（源）に連結された画像形成部材の駆動
機構（特開昭５７ー１５１９５５号の公報を参照）等が
提案され公知である。然し、何れも、感光体の着脱交換
が不可能又は困難な構成であり、メンテンナンス等で着
脱交換が可能であっても、着脱交換時の軸芯合わせが困
難又は不充分である為に、感光体の回転むらが増大し
て、形成される画像にジター等が発生して画像品質を低
下させる等の不具合があった。As a solution therefor, image formation in which the axis of the photosensitive drum and the axis of the motor output shaft are made to coincide by inserting the center axis of the photosensitive drum into the shaft hole of the drive cylinder shaft and bearing it Device (see Japanese Patent Application Laid-Open No. 2-282721), a photoconductor driving device of a copying machine (actually developed 60) in which a drive shaft of the photoconductor is connected to a rotating body (driving source) via a vibration absorbing material.
No. 63869), a photoconductor of an electronic copying machine is provided with a coupling between the rotary shaft and a drive system, the photoconductor being detachably attachable / detachable, and a cushioning member is provided on one claw contact surface of the coupling. Body driving device (see Japanese Patent Laid-Open No. 59-228281) and method for rotating an electrophotographic photosensitive drum in which a magnet rotor of a flat motor is directly connected to a support shaft of the photosensitive drum (Japanese Patent Laid-Open No. 208868/1990). reference),
An image forming member drive mechanism (see JP-A-57-151955) in which a drum-shaped image forming member is connected to a driving body (source) via a flywheel or a vibration damping member is proposed and known. . However, in both cases, it is impossible or difficult to attach / detach the photoreceptor, and even if the attachment / detachment is possible due to maintenance, etc., the alignment of the axis at the time of attachment / detachment is difficult or insufficient. There has been a problem that unevenness in rotation of the body is increased, a jitter is generated in the formed image, and the image quality is deteriorated.
【０００５】[0005]
【発明が解決しようとする課題】従来の画像形成装置に
おいては、感光体等のメンテンナンス時等に、感光体の
着脱交換が不可能又は困難であり、更には、装着時の軸
芯合わせが困難又は不充分である為に、感光体の回転む
らが増大して、形成される画像にジター等が発生して画
像品質が低下するという問題があった。In the conventional image forming apparatus, it is impossible or difficult to attach / detach the photoconductor at the time of maintenance of the photoconductor or the like, and further, it is difficult to align the axis when the photoconductor is attached. Alternatively, there is a problem in that the rotation unevenness of the photosensitive member is increased due to insufficientness, and a jitter or the like is generated in the formed image to deteriorate the image quality.
【０００６】[0006]
【発明の目的】そこで本発明は、このような問題点を解
決するものである。すなわち、本発明は、駆動装置から
の感光体の着脱交換が容易で、且つ装着時の正確な軸芯
合わせが可能な画像形成装置を提供することを目的とす
る。SUMMARY OF THE INVENTION Therefore, the present invention is to solve such a problem. That is, it is an object of the present invention to provide an image forming apparatus in which the photosensitive member can be easily attached to and detached from the drive device and the axis of the photosensitive member can be accurately aligned at the time of mounting.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、感光体を回転駆動して画像形成を行う画
像形成装置において、駆動源から駆動力の伝達を受ける
と共に感光体を回転駆動する駆動ローラに着脱して駆動
力伝達を断接する駆動ユニットとから成り、上記駆動ユ
ニットは軸方向にスライドする回転軸の一端に固定した
連結部材と、上記駆動ローラの一端に固定した連結部材
の各対向部に夫々設けたセンター出し手段と駆動力伝達
手段とを備えたこと、上記センター出し手段は、一方の
連結部材に設けたピンと他方の連結部材に設けた穴との
嵌合によって回転軸と駆動ローラとのセンター出しを行
う構成であること、上記駆動力伝達手段は、一方の連結
部材に設けた突起と他方の連結部材に設けたリブとの係
合によって回転軸から駆動ローラへの駆動力の伝達を行
う構成であること、上記駆動ユニットの上記回転軸は、
上記駆動源の出力軸と上記駆動ユニットの回転軸との間
にベルトを張設した状態で軸方向にスライドすることが
できる構成であることを特徴とする。In order to achieve the above object, the present invention provides an image forming apparatus for rotationally driving a photoconductor to form an image, in which a driving force is transmitted from a driving source and the photoconductor is A driving unit that is attached to and detached from a driving roller that is rotationally driven to connect and disconnect the driving force transmission. The driving unit is a coupling member that is fixed to one end of a rotating shaft that slides in the axial direction, and a coupling that is fixed to one end of the driving roller. Each of the facing parts of the member is provided with a centering means and a driving force transmitting means respectively provided by the fitting of a pin provided on one connecting member and a hole provided on the other connecting member. The rotating shaft and the drive roller are centered, and the drive force transmitting means is configured such that the protrusion provided on one connecting member and the rib provided on the other connecting member engage the rotating shaft. It is configured to perform the transmission of the driving force to et the driving roller, the rotation shaft of the drive unit,
A belt is stretched between the output shaft of the drive source and the rotary shaft of the drive unit so that the belt can slide in the axial direction.
【０００８】[0008]
【作用】上記のように構成された画像形成装置は、駆動
ユニットの軸方向にスライドする回転軸の一端と上記駆
動ローラの一端に夫々連結部材を設け、各連結部材の対
向部に夫々センター出し手段と、駆動力伝達手段とを設
け、回転軸と駆動ローラとの軸芯合わせと回転軸からの
駆動力の駆動ローラへの伝達を同時に実現した。この
為、駆動ユニットからの感光体の着脱交換が容易で、且
つ装着時の正確な軸芯合わせが行われ、回転むらの発生
しない画像形成装置を提供することができる。In the image forming apparatus constructed as described above, a connecting member is provided at one end of the rotary shaft that slides in the axial direction of the drive unit and at one end of the drive roller, and the center is provided at the facing portion of each connecting member. Means and driving force transmitting means are provided to simultaneously achieve axial alignment of the rotating shaft and the driving roller and transmission of the driving force from the rotating shaft to the driving roller. Therefore, it is possible to provide an image forming apparatus in which the photoconductor can be easily attached to and detached from the drive unit and replaced, and the axis alignment can be accurately performed when the photoconductor is attached, and rotation unevenness does not occur.
【０００９】[0009]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。図１本発明を適用した画像形成装置の要部
の構成説明図であり、ベルト状感光体の駆動ローラと、
これを駆動するモータ側に配置されたギヤとの連結機構
を示している。図１において、ベルト状感光体３は、テ
ンションローラ１１、従動ローラ１２、駆動ローラ４に
巻掛け張設され、図示矢印Ａ方向に循環移動されて画像
形成が行なわれるようになっている。モータである駆動
源１の出力プーリ１ａと駆動ユニット２を構成する回転
軸５の他端に設けられたプーリ５ａ間に張設されたタイ
ミングベルト等のベルト１０によって、駆動源１からの
駆動力が駆動ユニット２の回転軸５に伝達される。駆動
源１の駆動力が伝達された駆動ユニット２の回転軸５の
一端に軸心を固定した連結部材６と駆動ローラ４の一端
に設けた連結部材７とが対向する対向部には、回転軸５
と駆動ローラ４とのセンター出し手段８と、回転軸５か
ら駆動ローラ４への駆動力を伝達する駆動力伝達手段９
とが夫々配置され、駆動ユニット２の連結部材６と駆動
ローラ４の連結部材７の対向部が着脱可能になってい
る。Embodiments of the present invention will now be described with reference to the drawings. <Figure 1> It is the constitution explanation drawing of the principal part of the picture formation device which applies this invention, the drive roller of the belt type photo conductor,
The connection mechanism with the gear arrange | positioned at the motor side which drives this is shown. In FIG. 1, the belt-shaped photoconductor 3 is wound around the tension roller 11, the driven roller 12, and the drive roller 4, and is circulated in the direction of arrow A in the figure to form an image. A driving force from the driving source 1 is generated by a belt 10 such as a timing belt stretched between the output pulley 1a of the driving source 1 which is a motor and the pulley 5a provided at the other end of the rotating shaft 5 constituting the driving unit 2. Is transmitted to the rotary shaft 5 of the drive unit 2. A rotating member 5 is connected to the rotary shaft 5 of the drive unit 2 to which the drive force of the drive source 1 is transmitted. Axis 5
And centering means 8 for driving roller 4 and driving force transmitting means 9 for transmitting driving force from rotating shaft 5 to driving roller 4.
Are arranged respectively, and the facing portion of the connecting member 6 of the drive unit 2 and the connecting member 7 of the drive roller 4 is detachable.
【００１０】駆動ユニット２の回転軸５の連結部材６の
中心に設けられたピン８ａ（図３）が駆動ローラ４の連
結部材７の中心に設けられた穴８ｂに嵌合することによ
って回転軸５と駆動ローラ４との軸芯合わせが行なわ
れ、センター出しが行なわれる。同様に、駆動ユニット
２の回転軸５の連結部材６の偏心位置に設けられた突起
９ａが駆動ローラ４の連結部材７に設けられたリブ９ｂ
（或は凹所内壁）に係合することによって回転軸５から
駆動ローラ４への駆動力の伝達が行なわれる。A pin 8a (FIG. 3) provided at the center of the connecting member 6 of the rotary shaft 5 of the drive unit 2 is fitted into a hole 8b provided at the center of the connecting member 7 of the drive roller 4 so that the rotary shaft is rotated. 5 and the drive roller 4 are aligned with each other, and centering is performed. Similarly, the protrusion 9 a provided at the eccentric position of the connecting member 6 of the rotary shaft 5 of the drive unit 2 is provided with the rib 9 b provided on the connecting member 7 of the drive roller 4.
By engaging with (or the inner wall of the recess), the driving force is transmitted from the rotary shaft 5 to the driving roller 4.
【００１１】図２は上記両連結部材の周辺の構成を示す
正面図であり、図２において、回転軸５は、フレーム２
１とフレーム２２によって回動自在に支持され、且つ回
転軸５には係止部材２３が一体化されている。回転軸５
は、上記フレーム２１と回転軸５に固定された係止部材
２３間に設けられたばね２４によって、矢印Ｂで示す軸
方向に付勢されてスライドするようになっていて、係止
部材２３がフレーム２２で係止されスライドが制限され
るようになっている。FIG. 2 is a front view showing the structure around both the connecting members. In FIG. 2, the rotary shaft 5 is a frame 2
1 and a frame 22 are rotatably supported, and a locking member 23 is integrated with the rotary shaft 5. Rotating shaft 5
Is configured to be slid by being urged in the axial direction indicated by an arrow B by a spring 24 provided between the frame 21 and a locking member 23 fixed to the rotary shaft 5, and the locking member 23 being a frame. It is locked by 22 and the slide is restricted.
【００１２】図３は両連結部材の連結状態を示す分解斜
視図であり、回転軸５の連結部材６の中心に設けられた
ピン８ａが駆動ローラ４の連結部材７の中心に設けられ
た穴８ｂに嵌合することによって回転軸５と駆動ローラ
４との軸芯合わせが行なわれ、センター出しが行なわれ
る。上記ピン８ａと穴８ｂの形状は円柱、円錐、テーパ
等のいずれの形状であってもよい。要するに、ピン８ａ
と穴８ｂの形状は、回転軸５がばね２４によってＢ方向
に付勢されてスライドすることにともなって駆動ローラ
４との軸芯合わせが行なわれ、センター出しが行なわれ
得る形状であればよい。尚、回転軸５の連結部材６に設
けられたピン８ａの位置と駆動ローラ４の連結部材７に
設けられる穴８ｂの位置は必ずしも各円盤部の中心位置
でなくてもよく、回転軸５が上記ばね２４によってＢ方
向に付勢されてスライドするのにともなって駆動ローラ
４との軸芯合わせが行なわれ、センター出しが行なわれ
るならば任意の位置でも差支えはない。FIG. 3 is an exploded perspective view showing the connected state of both connecting members. A pin 8a provided at the center of the connecting member 6 of the rotary shaft 5 is a hole provided at the center of the connecting member 7 of the drive roller 4. By fitting into 8b, the rotary shaft 5 and the drive roller 4 are aligned with each other, and centering is performed. The shape of the pin 8a and the hole 8b may be any shape such as a cylinder, a cone, or a taper. In short, pin 8a
The shape of the hole 8b may be any shape as long as the rotary shaft 5 is biased by the spring 24 in the B direction and slides, the shaft center is aligned with the drive roller 4, and centering is performed. . The position of the pin 8a provided on the connecting member 6 of the rotary shaft 5 and the position of the hole 8b provided on the connecting member 7 of the drive roller 4 do not necessarily have to be the central position of each disk portion, and the rotary shaft 5 As the spring 24 biases and slides in the direction B, the shaft center of the drive roller 4 is aligned, and the center of the drive roller 4 is aligned.
【００１３】回転軸５の連結部材６に設けられた突起９
ａが駆動ローラ４の連結部材７に設けられた上記リブ９
ｂに係合して、回転駆動するようになっているから、回
転軸５からの回転駆動力が駆動ローラ４へ伝達される。
図示のように、突起９ａとリブ９ｂの形状は、回転軸５
がばね２４によってＢ方向に付勢されてスライドするこ
とにともなって駆動ローラ４との軸芯合わせが行なわれ
る際に、回転軸５からの回転駆動力が駆動ローラ４へ伝
達される係合であればいずれの形状でもよい。A protrusion 9 provided on the connecting member 6 of the rotating shaft 5.
a is the rib 9 provided on the connecting member 7 of the drive roller 4.
Since it engages with b and is driven to rotate, the rotational driving force from the rotary shaft 5 is transmitted to the drive roller 4.
As shown in the figure, the shapes of the protrusion 9a and the rib 9b are the same as those of the rotary shaft 5
Is urged by the spring 24 in the B direction and slides, so that the rotational drive force from the rotary shaft 5 is transmitted to the drive roller 4 when the axis alignment with the drive roller 4 is performed. Any shape may be used as long as it is available.
【００１４】図４は本発明の他の実施例の要部構成説明
図であり、回転軸５をジョイント部２５で駆動源１のモ
ータの回転軸に直接に接続すれば、上記実施例で説明し
た上記プーリ５ａや上記ベルト１０は不要になり、コス
トダウンが可能な構成とすることも可能である。また、
モータの出力軸と回転軸５とを同軸状に配置できるの
で、コンパクト化に貢献することができる。図５は本発
明の他の実施例の要部構成説明図であり、図２に示した
プーリ５ａとフレーム２１間の回転軸５上にジター対策
用のフライホイール２６を設けることによって、回転む
らを更に減少させることを可能としている。FIG. 4 is an explanatory view of the essential parts of another embodiment of the present invention. If the rotary shaft 5 is directly connected to the rotary shaft of the motor of the drive source 1 by the joint portion 25, it will be described in the above embodiment. The pulley 5a and the belt 10 described above are unnecessary, and the cost can be reduced. Also,
Since the output shaft of the motor and the rotary shaft 5 can be arranged coaxially, it is possible to contribute to downsizing. FIG. 5 is an explanatory view of a main part configuration of another embodiment of the present invention. By providing a flywheel 26 as a countermeasure against jitter on the rotary shaft 5 between the pulley 5a and the frame 21 shown in FIG. It is possible to further reduce.
【００１５】図６及び図７は本発明の他の実施例の構成
説明図であり、駆動ユニット２の回転軸５の連結部材６
と駆動ローラ４の連結部材７との対向部での対向状態か
ら、回転軸５を図７のように矢印Ｃで示す軸方向にスラ
イドさせて分離した状態でも、駆動源１のモータの位置
を固定したままで、ベルト１０は駆動源１のモータの回
転軸のプーリ１ａとプーリ５ａにベルト１０を張設した
状態が維持できるようになっている。従って、感光体３
等のメンテナンス等における着脱時の、ベルト１０の着
脱作業を不要としながらも、駆動ユニット２からの感光
体３の着脱交換が容易であり、且つ図３に示した軸芯合
わせ機構を備えることにより着脱交換時の正確な軸芯合
わせができる。FIG. 6 and FIG. 7 are explanatory views of the configuration of another embodiment of the present invention, in which the connecting member 6 of the rotary shaft 5 of the drive unit 2 is connected.
Even when the rotary shaft 5 is slid in the axial direction shown by the arrow C as shown in FIG. 7 and separated from the facing state in which the driving roller 4 and the connecting member 7 face each other, the position of the motor of the driving source 1 remains unchanged. While being fixed, the belt 10 can be maintained in a state in which the belt 10 is stretched around the pulley 1a and the pulley 5a of the rotary shaft of the motor of the drive source 1. Therefore, the photoconductor 3
By removing and attaching the belt 10 at the time of attachment / detachment for maintenance and the like, it is easy to attach / detach the photoconductor 3 from / to the drive unit 2, and by providing the axis alignment mechanism shown in FIG. Accurate axial centering when attaching / detaching and replacing is possible.
【００１６】図８は図７のＸ−Ｘ断面図であり、ベルト
１０の側面にテーパー状の切欠き部１０ａを形成するこ
とによって、鎖線で示すようにベルト１０を張設した状
態のままでＸ度傾斜させても、該切欠き部１０ａの存在
によりベルトの傾斜可能範囲が広がり、回転軸５をより
容易に軸方向にスライドすることが可能となる。図９は
図７のＸ−Ｘ断面図であり、ベルトの他の構成例であ
る。この例では、プーリ５ａの一方の側壁５ａ1 （ベル
トが傾倒する側の側壁）を低くすることによって、ベル
ト１０を張設した状態のままでＸ度傾斜させても、ベル
トの傾倒の障害となる側壁が一部除去されたこととなる
ので、回転軸５をより容易に軸方向にスライドさせるこ
とができる。FIG. 8 is a sectional view taken along the line XX in FIG. 7. By forming a tapered notch 10a on the side surface of the belt 10, the belt 10 is stretched as shown by the chain line. Even if it is tilted by X degrees, the range in which the belt can be tilted is widened due to the presence of the notch 10a, and the rotating shaft 5 can be slid in the axial direction more easily. FIG. 9 is a cross-sectional view taken along line XX of FIG. 7, which shows another example of the structure of the belt. In this example, by lowering one side wall 5a 1 of the pulley 5a (the side wall on which the belt is tilted), even if the belt 10 is tilted by X degrees with the belt 10 stretched, there is no obstacle to the belt tilting. This means that the side wall is partially removed, so that the rotary shaft 5 can be slid in the axial direction more easily.
【００１７】[0017]
【発明の効果】本発明は、以上説明したように構成され
ているので、駆動ユニットの軸方向にスライドする回転
軸の一端の連結部材と駆動ローラの一端の連結部材とを
対向させる対向部で回転軸と駆動ローラの軸芯合わせの
センター出しを行って、回転軸からの駆動力を駆動ロー
ラに伝達するようにしので、駆動ユニットからの感光体
の着脱交換が容易で、且つ装着時の正確な軸芯合わせが
でき、回転むらの発生しない画像形成装置を提供するこ
とができるようになった。Since the present invention is configured as described above, it is provided with the facing portion which makes the connecting member at one end of the rotary shaft sliding in the axial direction of the drive unit and the connecting member at one end of the drive roller face each other. The center of the rotary shaft and the drive roller are centered so that the drive force from the rotary shaft is transmitted to the drive roller. Thus, it is possible to provide an image forming apparatus that can perform proper axis alignment and that does not cause uneven rotation.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施例を示す画像形成装置の要部の斜
視図。FIG. 1 is a perspective view of a main part of an image forming apparatus showing an embodiment of the present invention.
【図２】図１の実施例の要部の拡大図。FIG. 2 is an enlarged view of a main part of the embodiment shown in FIG.
【図３】図２の要部の拡大斜視図。FIG. 3 is an enlarged perspective view of a main part of FIG.
【図４】本発明の他の実施例の要部の正面図。FIG. 4 is a front view of a main part of another embodiment of the present invention.
【図５】本発明の他の実施例の要部の正面図。FIG. 5 is a front view of the main part of another embodiment of the present invention.
【図６】本発明の他の実施例におけるモータと回転軸と
の連結状態を示す平面図。FIG. 6 is a plan view showing a connected state of a motor and a rotary shaft according to another embodiment of the present invention.
【図７】図６の実施例において回転軸を移動させた場合
におけるプーリの変形状態を示す平面図。7 is a plan view showing a deformed state of the pulley when the rotating shaft is moved in the embodiment of FIG.
【図８】図７のＸーＸ線断面。8 is a sectional view taken along line XX of FIG.
【図９】図７のＸーＸ線断面であり、ベルトの形状を異
ならせたもの。9 is a cross-sectional view taken along line XX of FIG. 7, in which the shape of the belt is different.
【図１０】従来技術の画像形成装置の概略構成の説明
図。FIG. 10 is an explanatory diagram of a schematic configuration of a conventional image forming apparatus.
【図１１】従来技術の画像形成装置の要部の斜視図。FIG. 11 is a perspective view of a main part of a conventional image forming apparatus.
１・・・駆動源、１ａ・・・プーリ、２・・・駆動ユニ
ット、３・・・感光体、４・・・駆動ローラ、５・・・
回転軸、５ａ・・・プーリ、５ａ1 ・・・側壁、６・・
・連結部材、７・・・連結部材、８・・・センター出し
手段、８ａ・・・ピン、８ｂ・・・穴、９・・・駆動力
伝達手段、９ａ・・・突起、９ｂ・・・リブ、１０・・
・ベルト（タイミングベルト）、１０ａ・・・切欠き
部、１１・・・テンションローラ、１２・・・従動ロー
ラ、２１・・・フレーム、２２・・・フレーム、２３・
・・係止部材、２４・・・ばね、２５・・・ジョイント
部、２６・・・フライホイール、１０１・・・駆動源、
１０１ａ・・・プーリ、１０３・・・感光体、１０４・
・・駆動ローラ、１０５ａ・・・プーリ、１１０・・・
ベルト（タイミングベルト）、１１１・・・テンション
ローラ、１１２・・・従動ローラ、１１３・・・除電ラ
ンプ、１１４・・・帯電ユニット、１１５・・・光書き
込みユニット、１１６・・・現像ローラ、１１７・・・
転写ユニット、１１８・・・記録紙、１１９・・・定着
ローラ、１２０・・・駆動ギア。1 ... Drive source, 1a ... Pulley, 2 ... Drive unit, 3 ... Photoconductor, 4 ... Drive roller, 5 ...
Rotation axis, 5a · · · pulley, 5a 1 · · · sidewall, 6 ...
Connection member, 7 ... Connection member, 8 ... Center setting means, 8a ... Pin, 8b ... Hole, 9 ... Driving force transmission means, 9a ... Projection, 9b ... Rib, 10 ...
Belt (timing belt), 10a ... notch, 11 ... tension roller, 12 ... driven roller, 21 ... frame, 22 ... frame, 23 ...
..Locking member, 24 ... Spring, 25 ... Joint part, 26 ... Flywheel, 101 ... Drive source,
101a ... pulley, 103 ... photoreceptor, 104 ...
..Drive rollers, 105a ... Pulleys, 110 ...
Belt (timing belt), 111 ... tension roller, 112 ... driven roller, 113 ... static elimination lamp, 114 ... charging unit, 115 ... optical writing unit, 116 ... developing roller, 117 ...
Transfer unit, 118 ... Recording paper, 119 ... Fixing roller, 120 ... Drive gear.
Claims (4)
像形成装置において、駆動源から駆動力の伝達を受ける
と共に感光体を回転駆動する駆動ローラに着脱して駆動
力伝達を断接する駆動ユニットを有し、上記駆動ユニッ
トは軸方向にスライドする回転軸の一端に固定した連結
部材と、上記駆動ローラの一端に固定した連結部材の各
対向部に夫々センター出し手段と駆動力伝達手段とを備
えたことを特徴とする画像形成装置。1. An image forming apparatus for rotationally driving a photoconductor to form an image, wherein drive force is transmitted from a drive source and is attached to and detached from a drive roller for rotationally driving the photoconductor to connect and disconnect the drive force transmission. The drive unit has a unit, and the drive unit has a connecting member fixed to one end of a rotary shaft that slides in the axial direction, and a centering unit and a driving force transmitting unit at each opposing portion of the connecting member fixed to one end of the drive roller. An image forming apparatus comprising:
材に設けたピンと他方の連結部材に設けた穴との嵌合に
よって回転軸と駆動ローラとのセンター出しを行う構成
であることを特徴とする請求項１記載の画像形成装置。2. The centering means is configured to center a rotating shaft and a drive roller by fitting a pin provided in one connecting member and a hole provided in the other connecting member. The image forming apparatus according to claim 1.
に設けた突起と他方の連結部材に設けたリブとの係合に
よって回転軸から駆動ローラへの駆動力の伝達を行う構
成であることを特徴とする請求項１記載の画像形成装
置。3. The driving force transmitting means is configured to transmit the driving force from the rotary shaft to the driving roller by engaging a protrusion provided on one coupling member and a rib provided on the other coupling member. The image forming apparatus according to claim 1, wherein:
駆動源の出力軸と上記駆動ユニットの回転軸との間にベ
ルトを張設した状態で軸方向にスライドすることができ
る構成であることを特徴とする請求項１記載の画像形成
装置。4. The rotary shaft of the drive unit is configured to be slidable in the axial direction with a belt stretched between the output shaft of the drive source and the rotary shaft of the drive unit. The image forming apparatus according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22945893A JP3394292B2 (en) | 1993-08-23 | 1993-08-23 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22945893A JP3394292B2 (en) | 1993-08-23 | 1993-08-23 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0764449A true JPH0764449A (en) | 1995-03-10 |
| JP3394292B2 JP3394292B2 (en) | 2003-04-07 |
Family
ID=16892522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22945893A Expired - Fee Related JP3394292B2 (en) | 1993-08-23 | 1993-08-23 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3394292B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006220944A (en) * | 2005-02-10 | 2006-08-24 | Fuji Xerox Co Ltd | Image forming apparatus |
-
1993
- 1993-08-23 JP JP22945893A patent/JP3394292B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006220944A (en) * | 2005-02-10 | 2006-08-24 | Fuji Xerox Co Ltd | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3394292B2 (en) | 2003-04-07 |
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