JPH06230708A - Cleaning device - Google Patents
Cleaning deviceInfo
- Publication number
- JPH06230708A JPH06230708A JP1343793A JP1343793A JPH06230708A JP H06230708 A JPH06230708 A JP H06230708A JP 1343793 A JP1343793 A JP 1343793A JP 1343793 A JP1343793 A JP 1343793A JP H06230708 A JPH06230708 A JP H06230708A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- supporting shaft
- photosensitive body
- photoconductor
- long holes
- 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
Landscapes
- Cleaning In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、感光体に残留する未転
写のトナーを掻き取って回収するブレード式のクリーニ
ング装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade type cleaning device for scraping and collecting untransferred toner remaining on a photosensitive member.
【０００２】[0002]
【従来の技術】従来、上記クリーニング装置として、図
５に示すものが知られている。このクリーニング装置１
において、ブレードホルダ２は感光体２０の回転軸（図
示せず）と平行な支軸３に回動自在に支持されている。
また、ブレードホルダ２には、硬質ゴムなど弾性材料か
らなる板状のブレード４が支持されており、このブレー
ド４の先端部４１が上記ブレードホルダ２に一端を係止
したスプリング５の付勢力により感光体２０の外周面に
圧接されている。2. Description of the Related Art Conventionally, the cleaning device shown in FIG. 5 has been known. This cleaning device 1
In, the blade holder 2 is rotatably supported by a support shaft 3 parallel to a rotation shaft (not shown) of the photoconductor 20.
A plate-shaped blade 4 made of an elastic material such as hard rubber is supported by the blade holder 2, and a tip portion 41 of the blade 4 is urged by a spring 5 whose one end is locked to the blade holder 2. It is pressed against the outer peripheral surface of the photoconductor 20.
【０００３】上記クリーニング装置１では、矢印ａ方向
に移動する感光体２０の外周面にブレード４の先端部４
１が摩擦接触し、この外周面に付着している未転写のト
ナーを掻き落とす。In the cleaning device 1, the tip portion 4 of the blade 4 is provided on the outer peripheral surface of the photoconductor 20 which moves in the direction of arrow a.
1 makes frictional contact, and scrapes off the untransferred toner adhering to the outer peripheral surface.
【０００４】[0004]
【発明が解決しようとする課題】ところで、感光体２０
に付着しているトナーは滑材の役割を果たし、ブレード
４と感光体２０との摩擦を緩和している。しかしなが
ら、感光体２０の外周面上で未転写のトナーが付着して
いるのは画像領域に限られ、いわゆる像間部や感光体両
端側の非画像領域にトナーは存在しない。そのため、非
画像領域にブレード４が圧接した状態で感光体２０が回
転を開始すると、ブレード４と感光体２０の摩擦力によ
り、図６に示すように、ブレード４の先端部４１が捲
れ、感光体２０の駆動系に急激に大きな負荷がかかり損
傷したり、ブレード４や感光体２０の外周面が損傷する
という問題点があった。By the way, the photoconductor 20
The toner adhering to the toner plays the role of a lubricant and alleviates the friction between the blade 4 and the photoconductor 20. However, the untransferred toner adheres to the outer peripheral surface of the photoconductor 20 only in the image region, and there is no toner in the so-called interimage region or in the non-image regions on both ends of the photoconductor. Therefore, when the photoconductor 20 starts to rotate while the blade 4 is in pressure contact with the non-image area, the frictional force between the blade 4 and the photoconductor 20 causes the tip portion 41 of the blade 4 to be rolled up as shown in FIG. There has been a problem that a large load is suddenly applied to the drive system of the body 20 to damage it, or the outer peripheral surface of the blade 4 and the photoconductor 20 is damaged.
【０００５】[0005]
【課題を解決するための手段】本発明は上記問題点を解
決するためになされたもので、上記クリーニング装置に
おいて、感光体の外周面とブレード圧接点を通る感光体
の接線とで囲まれた領域にホルダの支軸を移動可能に設
けたものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in the above cleaning device, it is surrounded by the outer peripheral surface of the photoconductor and the tangent line of the photoconductor passing through the blade pressure contact. The spindle of the holder is movably provided in the area.
【０００６】[0006]
【作用】上記構成によれば、ブレードと感光体との摩擦
力が大きくなると、この摩擦力を緩和する方向に支軸が
移動する。According to the above construction, when the frictional force between the blade and the photoconductor becomes large, the support shaft moves in a direction to alleviate this frictional force.
【０００７】[0007]
【実施例】以下、添付図面を参照して本発明の実施例に
ついて説明する。図１は本発明にかかるクリーニング装
置１’を示し、図５に示す従来のクリーニング装置１を
改良したもので、ブレードホルダ２の支軸３はクリーニ
ング装置１’の両側に設けたフレーム６，６の長孔７，
７（一方は図示せず）に移動可能に挿入されている。上
記長孔７は、ブレード４の感光体圧接点４２を中心とす
る円弧に沿って形成されている。また、長孔７の図上右
側端部は、この位置に支軸３があるとき支軸中心３１が
圧接点４２を通る感光体２０の接線８上に位置するよう
に形成されている。すなわち、支軸３、特に支軸中心３
１が接線８と感光体２０の外周面で囲まれた領域９を移
動できるようにしてある。さらに、上記支軸３は固定台
１０に設けた板バネ１１に付勢され、長孔７の図上右側
端部に位置している。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 shows a cleaning device 1'according to the present invention, which is an improvement of the conventional cleaning device 1 shown in FIG. 5, in which the support shaft 3 of the blade holder 2 is provided with frames 6, 6 provided on both sides of the cleaning device 1 '. Slot 7 of
7 (one of which is not shown) is movably inserted. The elongated hole 7 is formed along an arc centered on the photoconductor pressure contact 42 of the blade 4. Further, the right end portion of the elongated hole 7 in the figure is formed so that the spindle center 31 is located on the tangent line 8 of the photoconductor 20 passing through the pressure contact 42 when the spindle 3 is located at this position. That is, the support shaft 3, especially the support shaft center 3
1 is movable in a region 9 surrounded by the tangent line 8 and the outer peripheral surface of the photoconductor 20. Further, the support shaft 3 is biased by the leaf spring 11 provided on the fixed base 10 and is positioned at the right end of the elongated hole 7 in the figure.
【０００８】上記クリーニング装置１’では、感光体２
０とブレード４との摩擦力が急激に上昇すると、板バネ
１１の付勢力に抗して支軸３が長孔７を矢印ｂ方向に移
動し、感光体２０に対するブレード４の接触角αが減少
する。その結果、上記摩擦力が減少し、板バネ１１の付
勢力により支軸３が長孔７の図上右側端部に戻り、正規
の圧接状態となる。In the cleaning device 1 ', the photosensitive member 2
When the frictional force between 0 and the blade 4 rapidly rises, the support shaft 3 moves in the direction of the arrow b in the elongated hole 7 against the urging force of the leaf spring 11, and the contact angle α of the blade 4 with respect to the photoconductor 20 is increased. Decrease. As a result, the frictional force is reduced, and the support shaft 3 is returned to the right end portion of the elongated hole 7 in the figure by the urging force of the leaf spring 11 to be in a normal pressure contact state.
【０００９】次に、クリーニング装置１’における両端
部の構造について図２〜図４を参照して説明すると、感
光体２０の画像領域１２を囲む端部非画像領域１３に対
向するブレードホルダ２の端部ブレード支持部２１は、
図２に示すように感光体２０に向かって折り曲げるか、
または図３に示すようにブレードホルダ２に傾斜面を設
けて変形されており、この端部ブレード支持部２１に保
持されたブレード４は、先端部４２だけでなく、この先
端部４２近傍の感光体対向面も感光体２０の外周面と面
接触するか、または面接触に近い状態となっている。し
たがって、感光体両端側の非画像領域１３に接触するブ
レード４と感光体２０との摩擦力が大きくなっても、ブ
レード４の先端が捲れることはない。Next, the structure of both ends of the cleaning device 1'will be described with reference to FIGS. 2 to 4, of the blade holder 2 facing the end non-image area 13 surrounding the image area 12 of the photoconductor 20. The end blade support 21 is
Bend toward photoreceptor 20 as shown in FIG.
Alternatively, as shown in FIG. 3, the blade holder 2 is deformed by providing an inclined surface, and the blade 4 held by the end blade supporting portion 21 is not limited to the front end portion 42, but is also exposed near the front end portion 42. The body-facing surface also makes surface contact with the outer peripheral surface of the photoconductor 20, or is in a state close to surface contact. Therefore, even if the frictional force between the blade 4 and the photoconductor 20 in contact with the non-image area 13 on both sides of the photoconductor becomes large, the tip of the blade 4 will not be turned.
【００１０】なお、長孔７はブレード４の感光体圧接点
４２を中心とする円弧に沿って形成するものとしたが、
長孔７は支軸３を上記領域９内において移動可能に支持
しうるものであればよく、その方向等は上記実施例に限
定されるものではない。Although the elongated hole 7 is formed along an arc centered on the photosensitive member pressure contact 42 of the blade 4,
The long hole 7 may be any one as long as it can movably support the support shaft 3 in the area 9, and the direction and the like are not limited to those in the above embodiment.
【００１１】また、支軸３を移動可能に支持する構造は
長孔７に限るものでなく、移動可能に支持されている部
材に支軸３を支持してもよい。The structure for movably supporting the support shaft 3 is not limited to the elongated hole 7, and the support shaft 3 may be supported by a member movably supported.
【００１２】さらに、支軸３を長孔７の図上右側端部に
付勢する手段は板バネ１１に限るものでなく、コイルス
プリングであってもよい。Further, the means for urging the support shaft 3 toward the right end portion of the elongated hole 7 in the drawing is not limited to the leaf spring 11, but may be a coil spring.
【００１３】[0013]
【発明の効果】以上の説明で明らかなように、本発明に
かかるクリーニング装置によれば、感光体とブレードと
の摩擦力が急激に上昇しても、ブレードホルダが移動し
てその摩擦力が減少される。したがって、ブレード、感
光体、および感光体の駆動系にかかる負荷が少なく、長
期に亘り安定したクリーニング性が得られる。As is apparent from the above description, according to the cleaning device of the present invention, even if the frictional force between the photoconductor and the blade rises sharply, the blade holder moves and the frictional force is increased. Will be reduced. Therefore, the load on the blade, the photoconductor, and the drive system for the photoconductor is small, and stable cleaning properties can be obtained for a long period of time.
【図１】 本発明に係るクリーニング装置の部分断面図
である。FIG. 1 is a partial cross-sectional view of a cleaning device according to the present invention.
【図２】 ブレードホルダの端部斜視図である。FIG. 2 is an end perspective view of a blade holder.
【図３】 ブレードホルダの他の実施例を示す端部斜視
図である。FIG. 3 is an end perspective view showing another embodiment of the blade holder.
【図４】 本発明に係るクリーニング装置の側面図であ
る。FIG. 4 is a side view of the cleaning device according to the present invention.
【図５】 従来のクリーニング装置の側面図である。FIG. 5 is a side view of a conventional cleaning device.
【図６】 ブレードの捲れ状態を示すブレードの部分拡
大図である。FIG. 6 is a partially enlarged view of the blade showing a rolled state of the blade.
１，１’…クリーニング装置、２…ブレードホルダ、３
…支軸、４…ブレード、５…スプリング、４１…先端
部、７…長孔、８…接線。1, 1 '... cleaning device, 2 ... blade holder, 3
... spindle, 4 ... blade, 5 ... spring, 41 ... tip part, 7 ... long hole, 8 ... tangent line.
Claims (1)
動自在に支持されたホルダと、このホルダに支持された
ブレードと、上記ホルダを付勢してブレードの先端を感
光体の外周面に圧接したクリーニング装置において、上
記感光体の外周面とブレード圧接点を通る感光体の接線
とで囲まれた領域に上記支軸を移動可能に設けたことを
特徴とするクリーニング装置。1. A holder rotatably supported about a support shaft parallel to the rotation axis of the photoconductor, a blade supported by the holder, and the tip of the blade biasing the holder so that the tip of the blade is the outer periphery of the photoconductor. A cleaning device in pressure contact with a surface, wherein the spindle is movably provided in a region surrounded by an outer peripheral surface of the photoconductor and a tangent line of the photoconductor passing through a blade pressure contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343793A JPH06230708A (en) | 1993-01-29 | 1993-01-29 | Cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343793A JPH06230708A (en) | 1993-01-29 | 1993-01-29 | Cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06230708A true JPH06230708A (en) | 1994-08-19 |
Family
ID=11833111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343793A Pending JPH06230708A (en) | 1993-01-29 | 1993-01-29 | Cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06230708A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008233319A (en) * | 2007-03-19 | 2008-10-02 | Ricoh Co Ltd | Cleaning device, process cartridge, and image forming apparatus |
| JP2009063708A (en) * | 2007-09-05 | 2009-03-26 | Ricoh Co Ltd | Cleaning device, and image forming apparatus, process cartridge and recording medium conveyance unit including the same |
| JP2010072116A (en) * | 2008-09-16 | 2010-04-02 | Ricoh Co Ltd | Cleaning device, and image forming apparatus, process cartridge, recording material conveyance unit and intermediate transfer unit equipped with the cleaning device |
| JP2010072109A (en) * | 2008-09-16 | 2010-04-02 | Ricoh Co Ltd | Cleaning device, and image forming apparatus and process cartridge equipped with the same |
-
1993
- 1993-01-29 JP JP1343793A patent/JPH06230708A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008233319A (en) * | 2007-03-19 | 2008-10-02 | Ricoh Co Ltd | Cleaning device, process cartridge, and image forming apparatus |
| JP2009063708A (en) * | 2007-09-05 | 2009-03-26 | Ricoh Co Ltd | Cleaning device, and image forming apparatus, process cartridge and recording medium conveyance unit including the same |
| JP2010072116A (en) * | 2008-09-16 | 2010-04-02 | Ricoh Co Ltd | Cleaning device, and image forming apparatus, process cartridge, recording material conveyance unit and intermediate transfer unit equipped with the cleaning device |
| JP2010072109A (en) * | 2008-09-16 | 2010-04-02 | Ricoh Co Ltd | Cleaning device, and image forming apparatus and process cartridge equipped with the same |
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