JPH0331265B2 - - Google Patents

Info

Publication number
JPH0331265B2
JPH0331265B2 JP17566883A JP17566883A JPH0331265B2 JP H0331265 B2 JPH0331265 B2 JP H0331265B2 JP 17566883 A JP17566883 A JP 17566883A JP 17566883 A JP17566883 A JP 17566883A JP H0331265 B2 JPH0331265 B2 JP H0331265B2
Authority
JP
Japan
Prior art keywords
drum
paper
sliding contact
claw
tangent line
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.)
Expired
Application number
JP17566883A
Other languages
Japanese (ja)
Other versions
JPS6067979A (en
Inventor
Fumio Furusawa
Harumitsu Mizuishi
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 JP17566883A priority Critical patent/JPS6067979A/en
Publication of JPS6067979A publication Critical patent/JPS6067979A/en
Publication of JPH0331265B2 publication Critical patent/JPH0331265B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6532Removing a copy sheet form a xerographic drum, band or plate

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、複写機の用紙剥離装置に関し、詳
しくは、転写時に付着した用紙を感光体表面から
分離する分離爪の設置構造に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper separation device for a copying machine, and more particularly to a structure for installing a separation claw that separates paper attached during transfer from the surface of a photoreceptor.

〔従来技術〕[Prior art]

従来から複写機の中には、光半導体を利用して
書画情報を普通紙に複写するものがある。
2. Description of the Related Art Conventionally, some copying machines use optical semiconductors to copy graphic information onto plain paper.

これを第1図に概念的に示すと、光半導体を円
周表面上に蒸着した感光体ドラム1が回転するに
従い、まず帯電コロトロン2によつて感光体ドラ
ム1の面上に均一に電荷を付写し、続いて、プラ
テン3に載置された原稿4の書画情報を光源5か
らの光照射で光走査し、このときの反射光6を反
射鏡7a,7bおよびレンズ8により構成される
光学系を介して感光体ドラム1に入射させて、感
光体ドラム1の表面に原稿4の書画像に対応した
静電潜像を形成する。次いで、この複写機では、
この静電潜像を現像装置9によつて可視像化し、
それによつて得られたトナー像を転写コロトロン
10で電荷を与えた用紙11に転写する。さら
に、この複写機では、この転写後の感光体ドラム
1と該感光体ドラム1面上の残留トナーとを除電
コロトロン12によつて電気的に中和させ、しか
る後、感光体ドラム1周面上の残留トナーをクリ
ーニング装置13によつて除去し、さらに除電ラ
ンプ14によつて感光体ドラム1面上を照光して
完全に除電して、感光体ドラム1の繰返し使用を
可能にし、しかる後、帯電コロトロン2により再
度感光体ドラム1面上を帯電させる。以下、上記
動作を繰り返す。なお、15は記録用紙が積重さ
れたペーパートレイであり、16は記録用紙をペ
ーパートレイ15上から送り出すフイードロー
ラ、17はトナー像を記録用紙に定着させるため
のフユーザーである。
This is conceptually shown in FIG. 1. As the photoreceptor drum 1, on which the optical semiconductor is deposited on its circumferential surface, rotates, the charging corotron 2 first uniformly charges the surface of the photoreceptor drum 1. After copying, the calligraphic information on the document 4 placed on the platen 3 is scanned by light irradiation from the light source 5, and the reflected light 6 at this time is transmitted to an optical system composed of reflecting mirrors 7a, 7b and a lens 8. The electrostatic latent image is made incident on the photoreceptor drum 1 through a system to form an electrostatic latent image corresponding to the written image of the original document 4 on the surface of the photoreceptor drum 1. Next, in this copying machine,
This electrostatic latent image is visualized by a developing device 9,
The toner image thus obtained is transferred by a transfer corotron 10 to a charged paper 11. Further, in this copying machine, the photoreceptor drum 1 after the transfer and the residual toner on the surface of the photoreceptor drum 1 are electrically neutralized by the static eliminating corotron 12, and then the peripheral toner of the photoreceptor drum 1 is neutralized. The residual toner on the photoreceptor drum 1 is removed by the cleaning device 13, and the surface of the photoreceptor drum 1 is illuminated by the static elimination lamp 14 to completely eliminate the static electricity, thereby making it possible to use the photoreceptor drum 1 repeatedly. , the surface of the photosensitive drum 1 is charged again by the charging corotron 2. Thereafter, the above operation is repeated. Note that 15 is a paper tray on which recording paper is stacked, 16 is a feed roller that feeds the recording paper from above the paper tray 15, and 17 is a user that fixes the toner image on the recording paper.

ところで、このような複写機には、第2図に示
すように、転写コロトロン10の後ろにあつて、
転写時に感光体ドラム1の表面に静電力により強
固に付着した用紙11を分離するための分離爪2
0を備えているものがある。
By the way, in such a copying machine, as shown in FIG. 2, there is a
Separation claw 2 for separating paper 11 firmly adhered to the surface of photoreceptor drum 1 due to electrostatic force during transfer.
Some have 0.

この分離爪20は、その先端が感光体ドラム1
の表面に摺接し、転写済みの用紙11が、矢印A
方向に回転する感光体ドラム1に付着して移行し
てくると、用紙11の先端が分離爪20に当接
し、さらに用紙11が移行するに従つて感光体ド
ラム1と用紙11との間に分離爪20が介入して
ゆき、用紙11をドラム1から分離する。
This separating claw 20 has a tip end that is connected to the photosensitive drum 1.
The paper 11 that has been transferred is in sliding contact with the surface of the arrow A.
When the paper 11 adheres to the photoreceptor drum 1 rotating in the direction and moves, the leading edge of the paper 11 comes into contact with the separating claw 20, and as the paper 11 moves further, there is a gap between the photoreceptor drum 1 and the paper 11. Separation claw 20 intervenes and separates paper 11 from drum 1.

この時、分離爪20は、感光体ドラム1に付着
した用紙11に常に当接し、分離作業を完行する
ために、感光体ドラム1の摺接点25に引いた接
線30の外側に設けた軸aを中心に回転自在に装
着され、重心xにかかる自重wが生じる回転モー
メントで常にドラム1に摺接している。
At this time, the separating claw 20 is attached to a shaft provided outside the tangent line 30 drawn to the sliding contact point 25 of the photosensitive drum 1 so that the separating claw 20 always comes into contact with the paper 11 attached to the photosensitive drum 1 and completes the separation work. It is mounted so as to be rotatable around a, and is always in sliding contact with the drum 1 due to the rotation moment generated by its own weight w acting on the center of gravity x.

ところが、このような取付構造であると、軸a
が接線30の外側に設けられているで、摺接時の
ドラム1との間に生じる摩擦力や、用紙との当接
時の衝撃、あるいは用紙を分離するときに生じる
圧力等を軸aが受けて、分離爪20に与えられる
回転モーメントは、ドラム1を押圧するように
(矢印B方向に)発生し、感光体ドラム1の摩耗
を促進する。
However, with such a mounting structure, the axis a
is provided on the outside of the tangent line 30, so that the shaft a absorbs the frictional force generated between the drum 1 during sliding contact, the impact when it comes into contact with the paper, the pressure generated when separating the paper, etc. In response, the rotational moment applied to the separation claw 20 is generated so as to press the drum 1 (in the direction of arrow B), accelerating wear of the photoreceptor drum 1.

そのため、不良な画像が生じたり、感光体ドラ
ム1の寿命を短縮する等、問題を生じていた。
This has caused problems such as producing defective images and shortening the life of the photosensitive drum 1.

〔発明の目的〕[Purpose of the invention]

この発明は、このような問題に着目し、用紙の
分離爪によるドラムの摩耗速度を減少し、長期に
渡つて良画質の複写ができるように感光体ドラム
の寿命を延ばす分離爪を堤供することを目的とす
る。
The present invention focuses on such problems and provides a separating claw that reduces the rate of wear of the drum due to the paper separating claw and extends the life of the photosensitive drum so that high-quality copies can be made over a long period of time. With the goal.

〔発明の構成〕[Structure of the invention]

そのために、本発明においては、分離爪を支え
る支点をドラムの摺接点に引いた接線の内側に設
け、分離爪の自重のみがドラム摺接点に与えられ
るようにして上記目的を達成している。
Therefore, in the present invention, a fulcrum supporting the separating claw is provided inside a tangent line drawn to the sliding contact point of the drum, so that only the weight of the separating claw is applied to the drum sliding contact point, thereby achieving the above object.

〔実施例〕〔Example〕

以下、図面に基づいて本発明の実施例について
説明する。
Embodiments of the present invention will be described below based on the drawings.

第2図において、分離爪20aは「く」の字型
に形成され、その一方の辺の先端が感光体ドラム
1に摺接し、用紙11と当接して、これ11をド
ラム1から分離する。
In FIG. 2, the separating claw 20a is formed in a dogleg shape, and the tip of one side thereof slides on the photosensitive drum 1, comes into contact with the paper 11, and separates the paper 11 from the drum 1.

他方の辺の先端は、摺接点25aに引いたドラ
ム1の接線30の内側に突出して、その一部に軸
bが設けられる。この時、軸bは分離爪20aの
重心xよりも、ドラム側に設けられ、分離爪20
aを回転自在に支持している。
The tip of the other side protrudes inside the tangent line 30 of the drum 1 drawn to the sliding contact point 25a, and a shaft b is provided in a part thereof. At this time, the shaft b is provided closer to the drum than the center of gravity x of the separation claw 20a, and the separation claw 20a
A is rotatably supported.

このように構成すると、分離爪20aは自重の
みで生ずる回転モーメントに支えられ、常にドラ
ム1に摺接して用紙の分離を完行するが、分離時
に発生する力、例えば付着した用紙11が分離爪
20aに当接する衝撃力、摺接によつて生ずる摩
擦力、あるいは分離時の用紙11の圧力等の力は
接線30上に生ずるため、これらの力が接線の内
側にある軸bによつて支えられて、分離爪20a
に与えられる回転モーメントはドラム1の半径方
向の外側に(矢印C方向に)向かい、ドラム1に
無用な押圧力をかけることはない。
With this structure, the separating claw 20a is supported by the rotational moment generated only by its own weight, and always slides into contact with the drum 1 to complete the paper separation. Forces such as the impact force that contacts 20a, the frictional force caused by sliding contact, or the pressure of the paper 11 during separation occur on the tangent line 30, so these forces are supported by the axis b located inside the tangent line. When the separation claw 20a
The rotational moment applied to the drum 1 is directed outward in the radial direction of the drum 1 (in the direction of arrow C), and no unnecessary pressing force is applied to the drum 1.

分離爪20aは、例えばプラスチツクで形成す
ることができ、この場合、ほぼ重心x部にステン
レス鋼で形成した円柱状のおもりを埋め込み、こ
れを調節することによつて最適な摺接圧力を保つ
ことができる。
The separating claw 20a can be made of plastic, for example. In this case, a cylindrical weight made of stainless steel is embedded approximately at the center of gravity x, and by adjusting this, an optimum sliding contact pressure can be maintained. Can be done.

また、感光体ドラム1の周速度が200mm/secの
場合、軸bと接線の距離yを7mmとおけば、摺接
点25aの沿直方向に対するドラム1上の角度θ
を30゜と設定することができる。
Furthermore, when the circumferential speed of the photosensitive drum 1 is 200 mm/sec, if the distance y between the axis b and the tangent line is 7 mm, the angle θ on the drum 1 with respect to the vertical direction of the sliding contact point 25a
can be set to 30°.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明においては、感光
体ドラムに摺接して用紙を分離する分離爪の支持
軸をドラムの摺接点に引いた接線の内側に設ける
ことにより、ドラムに無用な押圧力をかけること
を防止し、ドラムの摩耗を防ぎ、その寿命を延ば
して、長期に渡つて良質の画像を堤供することが
できる。
As explained above, in the present invention, by providing the support shaft of the separation claw that separates the paper by slidingly contacting the photoreceptor drum inside the tangent line drawn to the sliding contact point of the drum, unnecessary pressing force is applied to the drum. It is possible to prevent the drum from being worn out, extend its lifespan, and provide high-quality images over a long period of time.

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

第1図は従来の複写機の概略説明図、第2図は
その分離爪の概略図、第3図は本発明に係る分離
爪の実施例を示す概略図である。 1……感光体ドラム、11……用紙、20,2
0a……分離爪、25,25a……摺接点、30
……接線、a,b……取付軸。
FIG. 1 is a schematic illustration of a conventional copying machine, FIG. 2 is a schematic diagram of its separation claw, and FIG. 3 is a schematic diagram showing an embodiment of the separation claw according to the present invention. 1...Photosensitive drum, 11...Paper, 20,2
0a... Separation claw, 25, 25a... Sliding contact, 30
...Tangential line, a, b...Mounting axis.

Claims (1)

【特許請求の範囲】[Claims] 1 分離爪を軸によつて複写機フレーム側に回動
自在に支持させ、該爪の先端を感光体ドラムに摺
接させて、ドラム上に付着した普通紙を該ドラム
から分離するようにした複写機の用紙剥離装置に
おいて、上記軸を上記ドラム上の爪の摺接点に引
いた接線の内側に位置させたことを特徴とする複
写機の用紙剥離装置。
1. A separating claw is rotatably supported on the copying machine frame side by a shaft, and the tip of the claw is brought into sliding contact with the photosensitive drum to separate the plain paper stuck on the drum from the drum. A paper peeling device for a copying machine, characterized in that the shaft is located inside a tangent line drawn to a sliding contact point of a pawl on the drum.
JP17566883A 1983-09-22 1983-09-22 Form peeling device of copying machine Granted JPS6067979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17566883A JPS6067979A (en) 1983-09-22 1983-09-22 Form peeling device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17566883A JPS6067979A (en) 1983-09-22 1983-09-22 Form peeling device of copying machine

Publications (2)

Publication Number Publication Date
JPS6067979A JPS6067979A (en) 1985-04-18
JPH0331265B2 true JPH0331265B2 (en) 1991-05-02

Family

ID=16000135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17566883A Granted JPS6067979A (en) 1983-09-22 1983-09-22 Form peeling device of copying machine

Country Status (1)

Country Link
JP (1) JPS6067979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021156509A1 (en) 2020-02-07 2021-08-12 Metabolic Explorer Modified microorganism and method for the improved production of ectoine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02103044A (en) * 1988-10-12 1990-04-16 Fuji Photo Film Co Ltd Sheet separating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021156509A1 (en) 2020-02-07 2021-08-12 Metabolic Explorer Modified microorganism and method for the improved production of ectoine

Also Published As

Publication number Publication date
JPS6067979A (en) 1985-04-18

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