JPH02232679A - Device for attaching and detaching photosensitive body - Google Patents
Device for attaching and detaching photosensitive bodyInfo
- Publication number
- JPH02232679A JPH02232679A JP5309089A JP5309089A JPH02232679A JP H02232679 A JPH02232679 A JP H02232679A JP 5309089 A JP5309089 A JP 5309089A JP 5309089 A JP5309089 A JP 5309089A JP H02232679 A JPH02232679 A JP H02232679A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive body
- flange
- photoreceptor
- image forming
- drawer
- 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
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 46
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
童呈上勿■亙分互
本発明は，レーザプリンタや複写機等の電子写真方式に
よる画像形成装置において，感光体を着脱するための着
脱装置に関する．
来の 術及び
最近のこの種の画像形成装置では，従来サービスマンが
行なっていた定期的交換部品について，ユーザでも簡単
に交換できるようにすることが望まれている．しかし，
特に感光体ドラムについては，その近辺に作像にかかる
他のユニットが配置されていることから、交換が菫しい
．
従来，感光体ドラムを着脱自在に支持する構造としては
、画像形成装置本体に感光体駆動軸を片持式に支持し，
該感光体駆動軸に感光体ドラムを着脱自在に取り付ける
とともに，感光体ドラムの他端を，Ｗ像形成装置本体の
機枠にネジ止めされる止め板で該機枠に保持するものが
あった．しかし，これでは片持式で不安定であり，また
感光体駆動軸を回転するための駆動部及びその支持部が
大型になるとか、感光体ドラムの着脱に手間がかかる等
の欠点があった．
そこで、この欠点を解決するものとして特開昭５５−１
０５２７５号公報に記載されているように，感光体ドラ
ムをそれに対し抜き差し自在なドラム軸によって画像形
成装隨の機粋に支持し、また該機枠に半円筒形状のドラ
ム受け部材を引き出し可能に装着し，ドラム軸を感光体
ドラムから抜き出して感光体ドラムをドラム受け部材上
に落下させ，その後該ドラム受け部材を機枠から引き出
して感光体ドラムを取り出すものが提案されている．
ところが，これによると，感光体ドラムの画像を形成す
る表面がドラム受け部材に衝突するため，その表面に傷
や打痕等が発生し、画像品質上において重大な支障が生
ずる．また，感光体ドラムの下部は通常の画像形成装置
では転写部及び用紙通路となっており，上記のようなド
ラム受け部材を配置できない等の問題がある．
本発明は，感光体を簡単にしかもその表面を保護して着
脱できるようにすることを目的とする．課 を 決する
ための
本発明は，感光体の一端の鞍部を作像ドロワに設けられ
た軸受に着脱自在に軸受けし，感光体の他端を，画像形
成装置本体内の感光体駆動部に着脱自在に連結して支持
する感光体着脱装置において．前記感光体の他端に該感
光体の外径よりも小さいフランジを設け，また前記作像
ドロワに、前記感光体駆動部から外された感光体の前記
フランジを受けるフランジ受け部を設けたことを特徴と
する．
■一一■
感光体を画像形成装置の感光体駆動部から外すと，感光
体のフランジが作像ドロワに設けられたフランジ受け部
に支持される８この後、作像ドロワを引き出し，感光体
の軸部を作像ドロワに設けられた軸受から外すと、感光
体を取り出すことができる．
ヌー」Ｌ一糎
第６図は，本発明による感光体着説装置を備えるレーザ
プリンタの一例の概要構成図である．プリンタ本体１０
内において、感光体ドラム１１の回りに帯電チャージャ
１２、光学ユニット１３．現像ユニット１４、転写チャ
ージャ１５，クリーニングユニット１６が配置され、感
光体ドラム１１は帯電・露光・現像・転写・清掃の、サ
イクルを繰り返す．一方，給紙トレイ１７からレジスト
ロ−ラ１８を介して感光体ドラム１１へ給送される用紙
１９は，該感光体ドラム１１と転写チャージャ１５との
間で感光体ドラム１１上のトナー像を転写された後，搬
送ベルト２０によって定着ユニット２１へ搬送されてト
ナー像を定着されてから，徘紙装置２２によって排出さ
れる．
第７図に示すように，感光体．ドラム１１、現像ユニッ
ト１４，転写チャージャ１５及びクリーニングユニット
ｌ６は作像ドロワ２３に着脱自在に装填される．作像ド
ロワ２３は，プリンタ本体１０に対しアキュライド２４
によって引き出すことができるように装着されている．
第１図は，本発明による感光体着脱装置の横断面図であ
る．感光体ドラム１１はその閉じた一端に軸部２５を一
体に突設し、また他端開口部に蓋板２６を嵌着している
．この蓋板２６には，ボス２７，及び該ボス２７より大
きく感光体ドラム１ｌの外径よりも小さい円錐台形のフ
ランジ２８が一体に設けられている．該フランジ２８の
内周面にはテーパを有するセレーション２９が刻設され
，また外周面には段部２８ａが形成されている．一方，
作像ドロワ２３には，円筒形の軸受３０がビボット３１
によって揺動自在に装着されている．感光体ドラム１１
の軸部２５は，該軸受３０にプッシュ３２を介して着脱
自在にかつ回転自在に軸受けされる．軸受３０内にはス
プリング３３によって外方へ付勢された押圧子３４が装
着されており．この軸受３０に軸部２５を軸受けした感
光体〆ラム１１は軸部２５とは反対の蓋板２６側へ付勢
される．また作像ドロワ２３には、軸受３０とは反対側
に，感光体ドラム１１のフランジ２８を受けるＵ字状の
フランジ受け部３５が設けられている，
プリンタ本体１０には感光体ドラム１１を回転させる駆
動軸３６が備えられ，該駆動軸３６にはテーバ付きセレ
ーシ１ン３７を外周面に有する駆動ギア３８が固着され
ている．
第１図に示すように感光体ドラム１ｌは，その軸部２５
を軸受３０に嵌合軸受けし，ボス２７に駆動軸３６を挿
通し，フランジ２８のセレーション２９と駆動ギア３８
のセレーション３７とを噛み合わせることによって支持
される．このとき，フランジ２８の外周面はフランジ受
け部３５の内周面に接触することなく，それより僅かに
（２ｍｍ程度）浮いた状態になる．そして、感光体ドラ
ム１１は，駆動軸３６の回転を伝達される．作像ドロワ
２３をプリンタ本体１０から引き出し，該作像ドロワ２
３と一体に感光体ドラム１１を第２図及び第３図矢印方
向に移動させると，駆動軸３６がボス２７から抜出する
とともに駆動ギア３Ｂとフランジ２８との噛み合いが外
れ．このフランジ２８がフランジ受け部３５上に落下し
て該フランジ受け部３５に第２図の如く支持される．そ
の際の落差は上記のように僅かであるため、衝撃はごく
少ない．感光体ドラム１１はスプリング３３によって付
勢されているため，フランジ２８の段部２８ａがフラン
ジ受け部３５の周縁部に圧接される．そして，感光体ド
ラム１１はこのように作像ドロワ２３に安定した状態で
保持されたまま，作像ドロワ２３と一体に引き出される
．この後，第４図に示すように、フランジ２８に指を掛
け，感光体ドラム１１をスプリング３３に抗して押しな
がら、第５図に示すように軸受３０を回動してフランジ
２８側を持ち上げ，フランジ受け部３５から外すととも
に，軸部３２を軸受３０から抜呂すれば、感光体ドラム
１１をプリンタ本体１０外で作像ドロワ２３から容易に
取り外すことができる．
ｍυ１泉
本発明によれば，次のような効果がある．■ 感光体の
軸部を作像ドロワに設けられた軸受に支持するとともに
，感光体のフランジを作像ドロワに設けられたフランジ
受け部に乗せて作像ドロワを引き出せるため，感光体の
表面を保護できる．
■ 感光体を作像ドロワとともに引き出せるため、感光
体の取り外し作業を画像形成装置外で容易に行える．DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment/detachment device for attaching and detaching a photoreceptor in an electrophotographic image forming apparatus such as a laser printer or a copying machine. With conventional and recent image forming devices of this type, it is desired that regular replacement parts, which used to be done by service personnel, can be easily replaced by users. but,
It is especially troublesome to replace the photoreceptor drum because other units involved in image formation are located nearby. Conventionally, the structure for removably supporting the photoreceptor drum is to support the photoreceptor drive shaft in a cantilevered manner on the main body of the image forming apparatus.
There was one in which the photoreceptor drum was detachably attached to the photoreceptor drive shaft, and the other end of the photoreceptor drum was held in the frame of the W image forming apparatus with a stopper plate that was screwed to the frame of the main body of the W image forming apparatus. ．． However, this method was unstable because it was a cantilever type, and had disadvantages such as the drive unit for rotating the photoconductor drive shaft and its support unit becoming large, and the time required to attach and detach the photoconductor drum. ．． Therefore, as a solution to this drawback, Japanese Unexamined Patent Publication No. 55-1
As described in Japanese Patent Application No. 05275, the image forming equipment is strategically supported by a drum shaft that can be inserted into and removed from the photosensitive drum, and a semi-cylindrical drum support member can be pulled out from the machine frame. It has been proposed that the photoreceptor drum is mounted, the drum shaft is pulled out from the photoreceptor drum, the photoreceptor drum is dropped onto a drum receiving member, and the drum receiving member is then pulled out from the machine frame to take out the photoreceptor drum. However, according to this method, the surface of the photoreceptor drum on which the image is formed collides with the drum receiving member, causing scratches, dents, etc. on the surface, resulting in serious problems in image quality. Furthermore, the lower part of the photoreceptor drum serves as a transfer section and a paper path in a normal image forming apparatus, and there are problems such as the inability to arrange the drum receiving member as described above. The object of the present invention is to make it possible to easily attach and detach a photoreceptor while protecting its surface. In the present invention, a saddle portion at one end of the photoreceptor is removably supported on a bearing provided in an image forming drawer, and the other end of the photoreceptor is removably mounted on a photoreceptor drive unit in the main body of an image forming apparatus. In a photoreceptor attachment/detachment device that freely connects and supports. A flange smaller than the outer diameter of the photoreceptor is provided at the other end of the photoreceptor, and a flange receiving portion is provided in the image forming drawer to receive the flange of the photoreceptor removed from the photoreceptor drive unit. It is characterized by ■11■ When the photoreceptor is removed from the photoreceptor drive section of the image forming apparatus, the flange of the photoreceptor is supported by the flange receiving part provided on the image forming drawer8.After this, the image forming drawer is pulled out and the photoreceptor is removed. The photoreceptor can be removed by removing the shaft from the bearing installed in the image drawer. Figure 6 is a schematic diagram of an example of a laser printer equipped with a photoreceptor attachment device according to the present invention. Printer main body 10
Inside, a charger 12, an optical unit 13. A developing unit 14, a transfer charger 15, and a cleaning unit 16 are arranged, and the photosensitive drum 11 repeats a cycle of charging, exposure, development, transfer, and cleaning. On the other hand, the paper 19 fed from the paper feed tray 17 to the photoreceptor drum 11 via the registration roller 18 transfers the toner image on the photoreceptor drum 11 between the photoreceptor drum 11 and the transfer charger 15. After that, the sheet is conveyed by the conveyor belt 20 to the fixing unit 21 to have the toner image fixed thereon, and then discharged by the wandering paper device 22. As shown in Figure 7, the photoreceptor. The drum 11, the developing unit 14, the transfer charger 15, and the cleaning unit l6 are removably loaded into the image forming drawer 23. The image forming drawer 23 is connected to the Accuride 24 with respect to the printer main body 10.
It is attached so that it can be pulled out. FIG. 1 is a cross-sectional view of a photoconductor attachment/detachment device according to the present invention. The photosensitive drum 11 has a shaft 25 integrally projecting from one closed end thereof, and a cover plate 26 fitted into the opening at the other end. This lid plate 26 is integrally provided with a boss 27 and a truncated conical flange 28 which is larger than the boss 27 and smaller than the outer diameter of the photosensitive drum 1l. A tapered serration 29 is formed on the inner peripheral surface of the flange 28, and a stepped portion 28a is formed on the outer peripheral surface. on the other hand,
A cylindrical bearing 30 is attached to the pivot 31 of the image forming drawer 23.
It is attached so that it can swing freely. Photosensitive drum 11
The shaft portion 25 is removably and rotatably supported by the bearing 30 via a pusher 32. A pusher 34 is mounted inside the bearing 30 and is urged outward by a spring 33. The photoreceptor closing ram 11, which has the shaft portion 25 supported by the bearing 30, is urged toward the cover plate 26 side opposite to the shaft portion 25. Further, the image forming drawer 23 is provided with a U-shaped flange receiving portion 35 for receiving the flange 28 of the photoreceptor drum 11 on the side opposite to the bearing 30. A drive shaft 36 is provided, and a drive gear 38 having a tapered serration ring 37 on its outer peripheral surface is fixed to the drive shaft 36. As shown in FIG. 1, the photosensitive drum 1l has its shaft portion 25.
is fitted into the bearing 30, the drive shaft 36 is inserted into the boss 27, and the serrations 29 of the flange 28 and the drive gear 38
It is supported by engaging the serrations 37 of the At this time, the outer circumferential surface of the flange 28 does not come into contact with the inner circumferential surface of the flange receiving part 35, but is slightly (about 2 mm) above it. The rotation of the drive shaft 36 is transmitted to the photosensitive drum 11. Pull out the image forming drawer 23 from the printer main body 10, and
When the photosensitive drum 11 is moved together with the photosensitive drum 3 in the direction of the arrow in FIGS. 2 and 3, the drive shaft 36 is pulled out from the boss 27 and the drive gear 3B and the flange 28 are disengaged. This flange 28 falls onto the flange receiving part 35 and is supported by the flange receiving part 35 as shown in FIG. Since the drop at that time is small as mentioned above, the impact is minimal. Since the photosensitive drum 11 is biased by the spring 33, the stepped portion 28a of the flange 28 is pressed against the peripheral edge of the flange receiving portion 35. The photosensitive drum 11 is thus held in a stable state by the image forming drawer 23 and is pulled out together with the image forming drawer 23. Thereafter, as shown in FIG. 4, while putting a finger on the flange 28 and pushing the photosensitive drum 11 against the spring 33, the bearing 30 is rotated as shown in FIG. By lifting it up and removing it from the flange receiving portion 35 and removing the shaft portion 32 from the bearing 30, the photosensitive drum 11 can be easily removed from the image forming drawer 23 outside the printer main body 10. According to the present invention, there are the following effects. ■ The shaft of the photoreceptor is supported by the bearing provided on the image forming drawer, and the flange of the photoreceptor is placed on the flange receiver provided on the image forming drawer and the image forming drawer can be pulled out. It can be protected. ■ The photoreceptor can be pulled out together with the image forming drawer, making it easy to remove the photoreceptor outside the image forming apparatus.
第１図は本発明による感光体着脱装置の横断面図、第２
図は感光体ドラムをプリンタ本体の駆動部から外した状
態の断面図，第３図は同斜視図、第４図は感光体ドラム
を作像ドロワから外す状態の斜視図，第５図はその部分
拡大図、第６図は本発明による感光体着脱装置を備える
レーザプリンタの概要構成図、第７図は作像ドロワを引
き出して示す該レーザプリンタの外観斜視図である．１
０・・・・・・・・・プリンタ本体
１１・・・・・・・・・感光体ドラム
２３・・・・・・・・・作像ドロヮ
２５・・・・・・・・・軸部
２８・・・・・・・・・フランジ
３０・・・・・・・・・軸受
３５・・・・・・・・・フランジ受け部３６・・・・・
・・・・駆動軸
３８・・・・・・・・・駆動ギア
第１図FIG. 1 is a cross-sectional view of a photoreceptor attachment/detachment device according to the present invention, and FIG.
The figure is a cross-sectional view of the photosensitive drum removed from the drive unit of the printer main body, Figure 3 is a perspective view of the same, Figure 4 is a perspective view of the photosensitive drum removed from the image forming drawer, and Figure 5 is the same perspective view. FIG. 6 is a schematic configuration diagram of a laser printer equipped with a photoreceptor attachment/detachment device according to the present invention, and FIG. 7 is an external perspective view of the laser printer with the image forming drawer pulled out. 1
0...Printer main body 11...Photosensitive drum 23...Image forming drawer 25...Shaft part 28...Flange 30...Bearing 35...Flange receiving part 36...
... Drive shaft 38 ... Drive gear Fig. 1
Claims (1)
脱自在に軸受けし、感光体の他端を、画像形成装置本体
内の感光体駆動部に着脱自在に連結して支持する感光体
着脱装置において、前記感光体の他端に該感光体の外径
よりも小さいフランジを設け、また前記作像ドロワに、
前記感光体駆動部から外された感光体の前記フランジを
受けるフランジ受け部を設けたことを特徴とする、感光
体着脱装置。A photoreceptor in which one end of the photoreceptor's shaft is removably supported by a bearing provided in an image forming drawer, and the other end of the photoreceptor is removably connected to and supported by a photoreceptor drive unit in the main body of an image forming apparatus. In the body attachment/detachment device, a flange smaller than an outer diameter of the photoreceptor is provided at the other end of the photoreceptor, and the image forming drawer includes:
A photoconductor attaching/detaching device, characterized in that a flange receiving portion is provided for receiving the flange of the photoconductor removed from the photoconductor drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5309089A JPH02232679A (en) | 1989-03-06 | 1989-03-06 | Device for attaching and detaching photosensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5309089A JPH02232679A (en) | 1989-03-06 | 1989-03-06 | Device for attaching and detaching photosensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02232679A true JPH02232679A (en) | 1990-09-14 |
Family
ID=12933085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5309089A Pending JPH02232679A (en) | 1989-03-06 | 1989-03-06 | Device for attaching and detaching photosensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02232679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004104711A1 (en) * | 2003-05-22 | 2004-12-02 | Mitsubishi Chemical Corporation | Light-sensitive body drum, method and device for assembling the drum, and image forming device using the drum |
| JP2005221567A (en) * | 2004-02-03 | 2005-08-18 | Ricoh Co Ltd | Process cartridge and image forming apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189386A (en) * | 1983-04-12 | 1984-10-26 | Canon Inc | Image forming device |
| JPS60142383A (en) * | 1983-12-29 | 1985-07-27 | Fuji Xerox Co Ltd | Photosensitive body supporting mechanism of electrophotographic copying machine |
-
1989
- 1989-03-06 JP JP5309089A patent/JPH02232679A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189386A (en) * | 1983-04-12 | 1984-10-26 | Canon Inc | Image forming device |
| JPS60142383A (en) * | 1983-12-29 | 1985-07-27 | Fuji Xerox Co Ltd | Photosensitive body supporting mechanism of electrophotographic copying machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004104711A1 (en) * | 2003-05-22 | 2004-12-02 | Mitsubishi Chemical Corporation | Light-sensitive body drum, method and device for assembling the drum, and image forming device using the drum |
| US7491161B2 (en) | 2003-05-22 | 2009-02-17 | Mitsubishi Chemical Corporation | Photoreceptor drums, methods and apparatus for assembling the same, and image-forming apparatus employing the same |
| CN100462864C (en) * | 2003-05-22 | 2009-02-18 | 三菱化学株式会社 | Light-sensitive body drum, method and device for assembling the drum, and image forming device using the drum |
| JP2005221567A (en) * | 2004-02-03 | 2005-08-18 | Ricoh Co Ltd | Process cartridge and image forming apparatus |
| JP4536390B2 (en) * | 2004-02-03 | 2010-09-01 | 株式会社リコー | Process cartridge and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4412258B2 (en) | Image forming apparatus | |
| US11567449B2 (en) | Image forming apparatus | |
| JP2002207408A (en) | Electrophotographic image forming device and process cartridge | |
| JPH0236947B2 (en) | ||
| JP4888528B2 (en) | Image forming apparatus | |
| US7983608B2 (en) | Cleaning apparatus | |
| JPH0425543B2 (en) | ||
| JP3581570B2 (en) | Waste toner treatment device in image forming apparatus | |
| JPH02232679A (en) | Device for attaching and detaching photosensitive body | |
| KR100555748B1 (en) | Image forming apparatus | |
| US20170108828A1 (en) | Process cartridge and image forming apparatus | |
| JP2849978B2 (en) | Imaging device | |
| JPH02253287A (en) | Photosensitive body unit | |
| JP2004224485A (en) | Sheet separation and supply device and image forming apparatus equipped with this device | |
| JPH09156794A (en) | Cleaning device for belt for conveying paper sheet | |
| JPH0820840B2 (en) | Image forming device | |
| JPS62187376A (en) | Recorder | |
| JPH082692Y2 (en) | Cleaning equipment | |
| JPH073421Y2 (en) | Electrophotographic device | |
| JPH01242812A (en) | Rotary body supporting device | |
| JP3285210B2 (en) | Electrophotographic equipment | |
| JPS5824151A (en) | Image forming device | |
| JP4603670B2 (en) | Image forming apparatus | |
| JPS62257176A (en) | Image formation cartridge for image forming device | |
| JPH01121886A (en) | Image forming device |