JPH01164989A - Mechanism for preventing reversal of blade of copying machine - Google Patents

Mechanism for preventing reversal of blade of copying machine

Info

Publication number
JPH01164989A
JPH01164989A JP32468487A JP32468487A JPH01164989A JP H01164989 A JPH01164989 A JP H01164989A JP 32468487 A JP32468487 A JP 32468487A JP 32468487 A JP32468487 A JP 32468487A JP H01164989 A JPH01164989 A JP H01164989A
Authority
JP
Japan
Prior art keywords
blade
photoreceptor
force
support plate
photosensitive body
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
JP32468487A
Other languages
Japanese (ja)
Inventor
Susumu Murakami
進 村上
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP32468487A priority Critical patent/JPH01164989A/en
Publication of JPH01164989A publication Critical patent/JPH01164989A/en
Pending legal-status Critical Current

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  • Cleaning In Electrography (AREA)

Abstract

PURPOSE:To prevent the reversal of a blade from being performed by deviating the center of the rotary shaft of the blade to a photosensitive body side than the tangent line of the blade with the photosensitive body, and furthermore, providing an absorbing means with a reversing force between the blade and a driving source for the supporting plate of the blade. CONSTITUTION:The position of the rotary shaft 7 of the supporting plate 5 to support the blade 2 is deviated in the direction of the photosensitive body 1 than the tangent line D of the blade 2 with the photosensitive body 1, and also, the other end of the supporting plate 5 is connected to the movable iron core 4' of a solenoid 4 by providing a spring 8 between them. Therefore, when a frictional force between the blade 2 and the photosensitive body 1 is increased, a force in a direction of B' to separate the blade 2 from the photosensitive body 1 is generated, and the force is absorbed by a means to absorb the force, that is, the spring 8. In such a way, it is possible to prevent the blade from being reversed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、例えば電子写真複写機のような装置のブレー
ドの反転を防止する機構に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a mechanism for preventing the blade of an apparatus such as an electrophotographic copying machine from being reversed.

(従来の技術) 一般に複写機は、感光体を均一に帯電し露光することで
感光体表面に静電潜像を形成しており、この潜像を可視
像化するために、潜像にトナーを付着させている。この
ようにして感光体表面に形成されたトナー像は、転写紙
に転写された後定着され、コピーとして仕上げられる。
(Prior Art) Copying machines generally form an electrostatic latent image on the surface of the photoreceptor by uniformly charging the photoreceptor and exposing it to light. Toner is attached. The toner image thus formed on the surface of the photoreceptor is transferred to transfer paper and fixed, thereby completing a copy.

ところで、転写工程によって全てのトナーが転写紙に転
写されるのではなく、一部のトナーが感光体の表面に残
留する。そこで次の像を形成するために、感光体表面の
残留トナーを除去する必要があり、クリーニング装置を
使用する。クリーニング装置は、クリーニング性能の面
より、ブレードを感光体に対して鋭角的に当てる方式が
一般に使用されている。
By the way, not all toner is transferred to the transfer paper in the transfer process, but some toner remains on the surface of the photoreceptor. Therefore, in order to form the next image, it is necessary to remove the residual toner on the surface of the photoreceptor, and a cleaning device is used. In view of cleaning performance, a cleaning device is generally used in which a blade is brought into contact with a photoreceptor at an acute angle.

また、最近の機械の高速化、長寿命化に伴ない、クリー
ニング装置を使用しないときは、ブレードを感光体から
離し、かつ、ブレードのエツジに付着した紙の粉末等の
異物を除去することが不可欠となっ−〔きている。
In addition, as modern machines have become faster and have longer lifespans, when the cleaning device is not in use, it is necessary to move the blade away from the photoreceptor and remove foreign matter such as paper powder attached to the edge of the blade. It has become essential.

vI4図及び第5図に示されるものが従来の一般的な構
造である。ドラム状の感光体1の表面に対向してブレー
ド2が設けられている。プレード2は支持板5に支持さ
れており、支持板5の一端は回転軸7によってフレーム
IIK枢支され、他端はソレノイド4の可動鉄心4′に
係止されている。
The conventional general structure is shown in FIG. vI4 and FIG. 5. A blade 2 is provided facing the surface of a drum-shaped photoreceptor 1. The blade 2 is supported by a support plate 5. One end of the support plate 5 is pivotally supported by a frame IIK by a rotating shaft 7, and the other end is locked to a movable iron core 4' of a solenoid 4.

ブレード2のエツジの清掃を行なうワイパー8を保持す
るワイパー回転板6は軸9によって、その略中央部をフ
レームIIK枢支され、他端は軸10によって支持板5
に枢支されている。
A wiper rotary plate 6 holding a wiper 8 that cleans the edge of the blade 2 is pivoted at its approximate center by a shaft 9, and the other end is supported by a shaft 10 on a support plate 5.
is supported by

以上のような構造であるから、クリーニング状態では、
ソレノイド4に通電すると可動鉄心4′が吸引され、支
持板5は回転軸7を支点として第5図のようになり、支
持板5に支持されたブレード2は感光体lへ圧着される
。クリーニング装置を使用しない状態では、ソレノイド
4の通電を停止するか、又は通電を逆方向にして、適宜
の手段により、可動鉄心4′を上方に移動すると、ブレ
ード2は前述と反対に感光体1から離れる。また、この
時ワイパー回転板6は、軸9によってフレーム11に枢
支されているので、支持板5の回動により、軸10を介
して回動され、ワイパー8がブレード2のエツジの清掃
を行なうことができる。回転軸7の位置は、ブレード2
と感光体重の接線より、感光体lの反対側にあった。
Due to the structure described above, in the cleaning state,
When the solenoid 4 is energized, the movable iron core 4' is attracted, the support plate 5 becomes as shown in FIG. When the cleaning device is not in use, when the movable core 4' is moved upward by stopping the energization of the solenoid 4 or by reversing the energization direction, the blade 2 moves upwardly to the photoreceptor 1 in the opposite way as described above. move away from Also, at this time, the wiper rotary plate 6 is pivotally supported by the frame 11 by the shaft 9, so the rotation of the support plate 5 causes the wiper rotary plate 6 to rotate via the shaft 10, and the wiper 8 cleans the edge of the blade 2. can be done. The position of the rotating shaft 7 is the same as that of the blade 2.
It was on the opposite side of the photoreceptor l from the tangent to the photoreceptor weight.

(発明が解決しようとする問題点) 前記のような従来の装置においては、ブレード2と感光
体1の摩擦力が増大したとき、ブレード2の逃げがなく
、摩擦力の増大に伴なってブレード2のエツジが感光体
1の回転に追随してまくれ込む反転現象が生ずることで
ある。またブレード2を感光体1に接触させるときの初
期のなじみの状態、及びブレード2のエツジを清掃する
ことによって摩擦力が増大し易いなど反転に対して不利
であった。
(Problems to be Solved by the Invention) In the conventional device as described above, when the frictional force between the blade 2 and the photoreceptor 1 increases, the blade 2 does not escape, and as the frictional force increases, the blade A reversal phenomenon occurs in which the edges of photoreceptor 1 follow the rotation of photoreceptor 1 and curl up. Further, there are disadvantages to reversal, such as the initial running-in condition when the blade 2 is brought into contact with the photoreceptor 1 and the frictional force that tends to increase due to cleaning the edge of the blade 2.

(問題点を解決するための手段) 本発明においては、前記の問題点を解決するため、ブレ
ードの回転軸の中心の位置を、ブレードと感光体の接線
より感光体側へ偏移させ、更にブレードとブレードの支
持板の駆動源との間に反転力の吸収手段を設けた。
(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, the center position of the rotation axis of the blade is shifted toward the photoreceptor side from the tangent between the blade and the photoreceptor, and the blade A reversing force absorbing means is provided between the blade support plate and the drive source of the blade support plate.

(作用) 本発明によれば、ブレードの回転軸の位置が、感光体と
ブレードの接線より感光体側へ偏移しているので、ブレ
ードと感光体との摩擦力が増加すると、ブレードを感光
体から離す方向の力が発生し、その力は、力を吸収する
手段によって吸収されるのでブレードの反転を防止する
ことができる。
(Function) According to the present invention, since the position of the rotating axis of the blade is shifted toward the photoreceptor from the tangent between the photoreceptor and the blade, when the frictional force between the blade and the photoreceptor increases, the blade is moved toward the photoreceptor. A force is generated in the direction away from the blade, which is absorbed by the force absorbing means, thereby preventing the blade from flipping.

(実施例) 第1図は、本発明の一実施例の要部断面図であって、第
2図及び第8図はその動作の状態を示すものである。第
4図及び第5図と同様な部分は同一の符号で示されてい
る。各部分の構造及び動作は、第4図及び第5図の場合
と略々同様であるが、本実施例においては、ブレード2
を支持する支持板5の回転軸7の位置が、ブレード2と
感光体1との接線よりも感光体1の方向へ偏移されてお
り、かつ、支持板5の他端とソレノイド4の可動鉄心4
′の間には、スプリング8を設けて両者を連結しである
(Embodiment) FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIGS. 2 and 8 show the operating state thereof. Similar parts to FIGS. 4 and 5 are designated by the same reference numerals. The structure and operation of each part are almost the same as those in FIGS. 4 and 5, but in this example, the blade 2
The position of the rotating shaft 7 of the support plate 5 supporting the blade 2 and the photoconductor 1 is shifted toward the photoconductor 1 from the tangent between the blade 2 and the photoconductor 1, and the other end of the support plate 5 and the movable solenoid 4 iron core 4
A spring 8 is provided between the two to connect the two.

通常のクリーニングを行なうときは、ソレノイド4に通
電することにより、第1図の通電されていない状態から
@2図の状態になる。支持板5は矢印C方向へスプリン
グ8を介して引張られ、支持板5の一端に支持されたブ
レード2は、回転軸7を支点として矢印Bの方へ回動さ
れ、感光体1へ圧着され、感光体1の矢印入方向への回
転に伴なって、クリーニングを行なう。この時のブレー
ド2の加圧力は、ソレノイド4の吸引力、スプリング8
の荷重値によって任意に設定することができる。
When performing normal cleaning, the solenoid 4 is energized to change from the non-energized state shown in FIG. 1 to the state shown in FIG. 2. The support plate 5 is pulled in the direction of arrow C via a spring 8, and the blade 2 supported at one end of the support plate 5 is rotated in the direction of arrow B about the rotating shaft 7 as a fulcrum, and is crimped onto the photoreceptor 1. , cleaning is performed as the photoreceptor 1 rotates in the direction indicated by the arrow. At this time, the pressing force of the blade 2 is the suction force of the solenoid 4, the spring 8
It can be set arbitrarily by the load value.

ブレード2と感光体1との摩擦力が増大したときに発生
する反転力は、ブレード2と感光体lとの接線方向、す
なわち第2図の矢印りの方向へ発生する。本発明におい
ては、支持板5の回転軸7が、図に示されるように、接
線方向矢印りよりも感光体の中心方向に偏移されており
、このため反転力は、支持@5に対し矢印C′の方向に
作用する。
A reversing force generated when the frictional force between the blade 2 and the photoreceptor 1 increases is generated in the tangential direction between the blade 2 and the photoreceptor 1, that is, in the direction of the arrow in FIG. In the present invention, the rotational axis 7 of the support plate 5 is offset toward the center of the photoreceptor relative to the tangential arrow as shown in the figure, so that the reversing force is exerted on the support @5. It acts in the direction of arrow C'.

支持板5の他端とソレノイド4の可動鉄心4′との間に
は、スプリング8が設けられているので、矢印C′方向
の力がスプリング8の荷重値を超えると、第3図に示さ
れるように、ソレノイド4が通電状態であっても、支持
板5は矢印C′の方向へ持ち上げられ、ブレード2は矢
印B′方向へ回動し、感光体lと接触する圧力が減少す
るか、又は離れることになり、反転を防止することがで
きる。
Since a spring 8 is provided between the other end of the support plate 5 and the movable core 4' of the solenoid 4, if the force in the direction of arrow C' exceeds the load value of the spring 8, the force as shown in FIG. Even if the solenoid 4 is energized, the support plate 5 is lifted in the direction of arrow C', the blade 2 is rotated in the direction of arrow B', and the pressure in contact with the photoreceptor l is reduced. , or move away to prevent reversal.

反転力を吸収する手段として、前記の実施例においては
、支持板5とソレノイド4の可動鉄心4′との間にスプ
リング8を設けたが、これに代えて、ブレード2を支持
板5に支持するとき、弾性の部材を介在させたり、また
は支持板5の一部を弾性体で構成させて、反転力を吸収
させることも可能である。あるいは、電気的にソレノイ
ド4の吸引力を調節することによっても可能である。
In the above embodiment, a spring 8 was provided between the support plate 5 and the movable core 4' of the solenoid 4 as a means for absorbing the reversing force. In this case, it is also possible to absorb the reversing force by interposing an elastic member or by configuring a part of the support plate 5 from an elastic body. Alternatively, it is also possible to electrically adjust the suction force of the solenoid 4.

(発明の効果) 本発明によりりIJ−ニングの性能が安定化し、ブレー
ド及び感光体を長寿命化することが可能になる。設置時
やブレード交換時の減摩剤の塗布を忘れたことによるブ
レード反転や感光体の損傷を防止できる。また、ブレー
ドのエツジと感光体との間に異物が侵入した場合も、そ
れに起因する反転力は、ブレードを感光体から離す方向
に作用し、かつ、その際にワイパーによってブレードの
エツジを清掃して異物を除去することが可能である。
(Effects of the Invention) According to the present invention, the performance of IJ-ning is stabilized, and the life of the blade and photoreceptor can be extended. It is possible to prevent the blade from turning over and damage to the photoreceptor due to forgetting to apply anti-friction agent when installing or replacing the blade. Furthermore, even if a foreign object enters between the edge of the blade and the photoreceptor, the resulting reversal force acts in the direction of moving the blade away from the photoreceptor, and at the same time, the wiper cleans the edge of the blade. It is possible to remove foreign substances by

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の一実施例のクリーニング状態でない
ときの要部断面略図、第2図及び第3図は、クリーニン
グ状態の要部断面略図であって、それぞれ正常の状態及
び反転力が加えられた状態を示す。 第4図及び第5図は、それぞれ従来例におけるクリーニ
ング状態でないときとクリーニング状態のときを示す要
部断面略図である。 1・・・感光体、  2・・・ブレード、  4・・・
ソレノイド、  5・・・支持板、  7・・・回転軸
馬33
FIG. 1 is a schematic cross-sectional view of the main part of an embodiment of the present invention when it is not in the cleaning state, and FIGS. 2 and 3 are schematic cross-sectional views of the main part in the cleaning state, respectively. Indicates the added state. FIG. 4 and FIG. 5 are schematic cross-sectional views of main parts showing the conventional example when not in the cleaning state and in the cleaning state, respectively. 1... Photoreceptor, 2... Blade, 4...
Solenoid, 5... Support plate, 7... Rotating shaft horse 33

Claims (1)

【特許請求の範囲】[Claims] (1)一端を回転軸によりフレームに枢支した支持板と
、支持板に支持されたブレードと、感光体とよりなり、
前記のブレードは支持板の他端を駆動してクリーニング
工程に際して感光体に接するようにされ、前記の回転軸
の中心はブレードと感光体の接線より感光体側へ偏移さ
れており、かつブレードと支持板の駆動源との間に反転
力の吸収手段を設けたことを特徴とする複写機のブレー
ド反転防止機構。
(1) Consisting of a support plate whose one end is pivoted to the frame by a rotating shaft, a blade supported by the support plate, and a photoreceptor,
The blade drives the other end of the support plate so that it comes into contact with the photoconductor during the cleaning process, and the center of the rotation axis is shifted toward the photoconductor from the tangent between the blade and the photoconductor. A blade reversal prevention mechanism for a copying machine, characterized in that a reversal force absorbing means is provided between a support plate and a drive source.
JP32468487A 1987-12-21 1987-12-21 Mechanism for preventing reversal of blade of copying machine Pending JPH01164989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32468487A JPH01164989A (en) 1987-12-21 1987-12-21 Mechanism for preventing reversal of blade of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32468487A JPH01164989A (en) 1987-12-21 1987-12-21 Mechanism for preventing reversal of blade of copying machine

Publications (1)

Publication Number Publication Date
JPH01164989A true JPH01164989A (en) 1989-06-29

Family

ID=18168575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32468487A Pending JPH01164989A (en) 1987-12-21 1987-12-21 Mechanism for preventing reversal of blade of copying machine

Country Status (1)

Country Link
JP (1) JPH01164989A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012203247A (en) * 2011-03-25 2012-10-22 Canon Inc Cleaning device and image forming device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5878185A (en) * 1981-11-05 1983-05-11 Casio Comput Co Ltd Toner removing device of electronic copying machine
JPS58120285A (en) * 1982-01-12 1983-07-18 Toshiba Corp Cleaning device
JPS62124584A (en) * 1985-11-25 1987-06-05 Sharp Corp Cleaning device
JPS62138881A (en) * 1985-12-11 1987-06-22 Sharp Corp Cleaning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5878185A (en) * 1981-11-05 1983-05-11 Casio Comput Co Ltd Toner removing device of electronic copying machine
JPS58120285A (en) * 1982-01-12 1983-07-18 Toshiba Corp Cleaning device
JPS62124584A (en) * 1985-11-25 1987-06-05 Sharp Corp Cleaning device
JPS62138881A (en) * 1985-12-11 1987-06-22 Sharp Corp Cleaning device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012203247A (en) * 2011-03-25 2012-10-22 Canon Inc Cleaning device and image forming device

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