JPH01263676A - Transfer device - Google Patents

Transfer device

Info

Publication number
JPH01263676A
JPH01263676A JP9425388A JP9425388A JPH01263676A JP H01263676 A JPH01263676 A JP H01263676A JP 9425388 A JP9425388 A JP 9425388A JP 9425388 A JP9425388 A JP 9425388A JP H01263676 A JPH01263676 A JP H01263676A
Authority
JP
Japan
Prior art keywords
transfer belt
roller
toner
blade
sheet
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
JP9425388A
Other languages
Japanese (ja)
Inventor
Shigeru Sawada
沢田 茂
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP9425388A priority Critical patent/JPH01263676A/en
Publication of JPH01263676A publication Critical patent/JPH01263676A/en
Pending legal-status Critical Current

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  • Cleaning In Electrography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To improve the efficiency of toner removal and to obtain a clean copy by providing a blade which contacts a transfer belt and a means which removes paper powder from the surface of the transfer belt positioned on the upstream side of an electrostatic charging means on the upstream side. CONSTITUTION:In the transfer device 131, the transfer belt 14 is moved as shown by an arrow (c) by a roller 17 in synchronism with the rotation of a photosensitive drum 3 and a sheet to which a toner image is transferred is separated from the belt 14 in a separation area Y where the sheet changes its direction suddenly at the position of the roller 15 and sent to a paper discharge part through a fixing device. A paper removing roller 25 removes paper powder from the belt 14 having passed through the area Y. The paper powder which is collected by the roller 25 is scraped by a blade 27 and removed to clean the roller 25. The particle size of toner is smaller than the paper powder and large-diameter paper powder is removed principally by the roller 25. The belt 14 from which the paper powder is removed has toner removed by a blade 24.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、無端状の転写ベルトを用いて静電潜像担体の
表面に保持されているトナーをシートに転写する転写装
置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transfer device that uses an endless transfer belt to transfer toner held on the surface of an electrostatic latent image carrier onto a sheet.

(従来の技術) 従来、前記転写装置として、 i、複数のローラに巻回され、前記ローラの回転に基づ
いて静電潜像担体と接触しながら回転移動する無端状の
転写ベルトと、 !1.該転写ベルトの表面に電荷を付与する帯電チャー
ジャ等の帯電手段と、 iii 、前記転写ベルトの回転方向に対して帯電手段
の上流側に位置し、転写ベルトに付着したトナー等の不
純物を除去するブレード方式のクリーニング装置と、 を備え、前記帯電手段で電荷が付与された転写ベルトと
トナー像が担持された静電潜像担体とでソートを挟持搬
送し、その際に前記トナー像を静電的にシートに転写す
るものが提案されている。
(Prior Art) Conventionally, the transfer device includes: (i) an endless transfer belt that is wound around a plurality of rollers and rotates and moves while contacting an electrostatic latent image carrier based on the rotation of the rollers; 1. a charging device such as a charger that applies an electric charge to the surface of the transfer belt; and (iii) a charging device located upstream of the charging device with respect to the rotational direction of the transfer belt to remove impurities such as toner attached to the transfer belt. a blade-type cleaning device, wherein the transfer belt charged by the charging means and the electrostatic latent image carrier carrying the toner image are sandwiched and transported for sorting, and at that time, the toner image is electrostatically charged. A method that transfers images onto sheets has been proposed.

(発明か解決しようとする課題) しかしながら、前記転写装置では、シートは転写ベルト
に付与されている電荷による静電気力により密着状態で
保持されるため、転写ベルトには少なからず紙粉が付着
する。
(Problems to be Solved by the Invention) However, in the transfer device, the sheet is held in close contact with the sheet by the electrostatic force caused by the charge applied to the transfer belt, so that a considerable amount of paper powder adheres to the transfer belt.

したがって、前記ブレード方式のクリーニング装置では
、ブレードの先端に紙粉が堆積してブレードのトナーの
除去効率が低下し、シートを汚すという課題を有してい
た。
Therefore, the blade-type cleaning device has a problem in that paper dust accumulates on the tip of the blade, reducing the toner removal efficiency of the blade and staining the sheet.

(課題を解決するための手段) 本発明は前記課題を解決するためになされたもので、一
実施例を示す第1.2図を参照して説明すると、複数の
ローラ(15)、〜、(19)に巻回された無端状の転
写ベルト(+ 4)と、該転写ベルト(14)に電荷を
付与する帯電手段〔帯電チャージャ)(21)とを備え
、該帯電手段(21)で帯電された転写ベルト(14)
でシートを保持しながら搬送し、静電潜像担体〔感光体
ドラム)(36)との対向部でその表面に保持されてい
るトナーを前記シートに転写する転写装置(13)にお
いて、転写ベルト(14)の回転方向〔矢印(c)方向
〕に対して、トナーを転写されたシートが転写ベル)(
14)から分離される領域〔分離領域〕(Y)より下流
側で、かつ、前記帯電手段(2I)の上流側に、転写ベ
ルト(14)に接触するブレード(23)と、該ブレー
ド(23)の上流側に位置し、転写ベルト(14)の表
面から紙粉を除去する紙粉除去手段〔紙粉除去ローラ)
(24)と、 を設けたものである。
(Means for Solving the Problems) The present invention has been made to solve the above problems, and will be described with reference to FIG. 1.2 showing one embodiment. (19), an endless transfer belt (+4) wound around the transfer belt (19), and a charging means (charger) (21) for applying an electric charge to the transfer belt (14). Charged transfer belt (14)
In a transfer device (13), a transfer belt conveys the sheet while holding it, and transfers the toner held on the surface of the electrostatic latent image carrier (photoreceptor drum) (36) to the sheet. (14) In the direction of rotation [direction of arrow (c)], the sheet to which the toner has been transferred is rotated by the transfer bell) (
A blade (23) in contact with the transfer belt (14) and a blade (23) in contact with the transfer belt (14) on the downstream side of the area separated from the transfer belt (14) [separation area] (Y) and on the upstream side of the charging means (2I). ) is located upstream of the transfer belt (14) and removes paper dust from the surface of the transfer belt (14).
(24) and .

(作用) 以上の構成からなる転写装置(13)では、転写ベルト
(14)は矢印(C)方向に回転移動しつつ転写チャー
ジャ(20)の放電に基づいて所定の電荷が付与される
(Function) In the transfer device (13) having the above configuration, the transfer belt (14) is given a predetermined electric charge based on the discharge of the transfer charger (20) while rotating in the direction of the arrow (C).

静電潜像担体(3)の表面に形成されたトナー像は矢印
(a)方向に搬送され、前記静電潜像担体(3)と転写
ベルト(14)との対向部である転写領域(X)に搬送
されてきたシートに転写される。
The toner image formed on the surface of the electrostatic latent image carrier (3) is conveyed in the direction of arrow (a), and is transferred to a transfer area (where the electrostatic latent image carrier (3) and the transfer belt (14) face each other). The image is transferred to the sheet conveyed to X).

前記シートは転写ベルト(14)との間に作用する静電
吸引力に基づいて保持され、密着状態で矢印(C)方向
に搬送される。
The sheet is held based on the electrostatic attraction force acting between the sheet and the transfer belt (14), and is conveyed in the direction of arrow (C) in close contact with the sheet.

そして、分離領域(Y)でシートが分離された転写ベル
ト(14)の表面は、紙粉除去手段(24)で紙粉が除
去され、続くブレード(23)にて残留トナーが除去さ
れる。
Then, paper dust is removed from the surface of the transfer belt (14) from which the sheets have been separated in the separation area (Y) by a paper dust removing means (24), and residual toner is removed by a subsequent blade (23).

(実施例) 以下、本発明を、一実施例を示す添付図面を参照して説
明する。
(Example) Hereinafter, the present invention will be described with reference to the accompanying drawings showing one example.

第1図は複写機の概略断面図、第2図は本発明にかかる
転写装置の断面図で、転写装置(13)において、転写
ベルト(14)は導電性基体の表面に誘電体層を設けた
無端状のもので、複数のローラ(15)、〜、(16)
に巻回されている。また、ローラ(16)は感光体ドラ
ム(3)に対向配置され、スプリング(20)によりベ
ルト(14)を挾んで感光体ドラム(3)の外周部に圧
接されている。さらに、ローラ(17)から(19)の
間に位置する転写ベルト(I4)の外側には帯電チャー
ジャ(21)及びクリーニング装置(22)が配置され
ている。
FIG. 1 is a schematic sectional view of a copying machine, and FIG. 2 is a sectional view of a transfer device according to the present invention. A plurality of rollers (15), ~, (16)
is wrapped around. Further, the roller (16) is arranged to face the photoreceptor drum (3), and is pressed against the outer circumference of the photoreceptor drum (3) with the belt (14) sandwiched between the rollers (20). Further, a charger (21) and a cleaning device (22) are arranged outside the transfer belt (I4) located between the rollers (17) to (19).

前記クリーニング装置(22)は、回収ボックス(23
)と、該回収ボックス(23)の中に位置し、転写ベル
ト(14)を介してローラ(18)に圧接するブレード
(24)と、転写ベルト(14)を挾んでローラ(19
)の反対側に位置し、スプリング(26)により転写ベ
ルト(14)を介してローラ(19)に圧接される紙粉
除去ローラ(25)と、前記回収ボックス(23)に固
設され、紙粉除去ローラ(25)の外周部に圧接するモ
ルトプレーンからなるブレード(27)と、で構成され
ている。
The cleaning device (22) includes a collection box (23).
), a blade (24) located in the collection box (23) and in pressure contact with the roller (18) via the transfer belt (14), and a roller (19) sandwiching the transfer belt (14).
) and is pressed against the roller (19) via the transfer belt (14) by a spring (26); It consists of a blade (27) made of maltplane that presses against the outer circumference of the powder removal roller (25).

なお、紙粉除去ローラ(25)の表面はポリテトラフル
オルエチレン、塩化ビニル、ポリエステル等の高絶縁性
物質で被覆されており、ブレード(27)との接触によ
る摩擦帯電により転写ベルト(14)上の紙粉は吸着さ
れる。
The surface of the paper dust removal roller (25) is coated with a highly insulating material such as polytetrafluoroethylene, vinyl chloride, polyester, etc., and the transfer belt (14) is charged by friction due to contact with the blade (27). The paper dust on top is absorbed.

以上の構成からなる転写装置(13)を備えた複写機で
は、複写開始信号が入力されると、感光体ドラム(3)
が回転しつつその表面は帯電チャージャ(4)の放電に
より所定の電圧に帯電される。
In a copying machine equipped with the transfer device (13) having the above configuration, when a copy start signal is input, the photosensitive drum (3)
While rotating, its surface is charged to a predetermined voltage by discharge from the charger (4).

また、光学系(5)では、露光ランプ(6)が矢印(b
)方向にスキャンし、複写機本体(1)の上部に設けた
開閉カバー(2)に覆われた原稿台ガラス(図示せず)
上の原稿に光が照射され、その反射光が一点鎖線に沿っ
て、帯電′された感光体ドラム(3)の表面に露光され
、原稿画像に対応した静電潜像が形成される。
In addition, in the optical system (5), the exposure lamp (6) is
) direction and is covered by an opening/closing cover (2) provided on the top of the copying machine body (1) (not shown).
The upper original is irradiated with light, and the reflected light is exposed to the charged surface of the photosensitive drum (3) along the dashed-dotted line, forming an electrostatic latent image corresponding to the original image.

この静電潜像は現像装置(7)からトナーが供給されて
トナー像として顕像化され、転写前イレーザ(8)の光
照射に基づいて前記トナー像と感光体ドラム(3)との
静電吸着力が減じられる。
This electrostatic latent image is visualized as a toner image by supplying toner from the developing device (7), and the toner image and the photoreceptor drum (3) are irradiated with light by the pre-transfer eraser (8). Electrostatic force is reduced.

一方、転写装置(13)では、感光体ドラム(3)の回
転と同期して図示しない駆動手段によりローラ(I7)
が回転し、それに従って転写ベルト(14)が矢印(C
)方向に回転移動するとともに、それに追随して他のロ
ーラが従動回転するとともに、転写ベルト(14)の表
面は帯電チャージャ(21)により所定電位に一様に帯
電される。
On the other hand, in the transfer device (13), the roller (I7) is driven by a driving means (not shown) in synchronization with the rotation of the photoreceptor drum (3).
rotates, and the transfer belt (14) follows the arrow (C).
) direction, other rollers follow and rotate, and the surface of the transfer belt (14) is uniformly charged to a predetermined potential by the charger (21).

また、給紙カセット(11)又は(12)から供給され
たシートは、タイミングローラ(12)にて前記トナー
像とタイミングをとって、感光体ドラム(3)と転写ベ
ルト(14)が接触する転写領域(X)に搬送される。
Further, the sheet fed from the paper feed cassette (11) or (12) is brought into contact with the photosensitive drum (3) and the transfer belt (14) in time with the toner image by a timing roller (12). It is transported to the transfer area (X).

ここで、感光体ドラム(3)上の荷電トナーは、転写ベ
ルト(14)と感光体ドラム(3)の間を搬送されるシ
ートに、静電的に又ローラ(16)と感光体ドラム(3
)との圧接圧により転写される。
Here, the charged toner on the photoreceptor drum (3) is electrostatically transferred to the sheet conveyed between the transfer belt (14) and the photoreceptor drum (3) and the roller (16) and the photoreceptor drum (3). 3
) is transferred by pressure.

トナー像が転写されたソートは、これと転写ベルト(1
4)との間に作用する静電気力により密着状態で矢印(
C)方向に搬送され、シート自身の腰の強さにより、ロ
ーラ(15)の所で急激に方向を換える分離領域(Y)
で転写ベルト(+ 4)の表面から分離され、定着装置
(29)で前記トナー像がソートに定着されたのち、排
紙部(30)に排出される。
This and the transfer belt (1
4) The arrow (
Separation area (Y) where the sheet is conveyed in the direction C) and changes direction abruptly at the roller (15) due to the stiffness of the sheet itself.
The toner images are separated from the surface of the transfer belt (+4) by the fixing device (29), sorted and fixed, and then discharged to the paper discharge section (30).

分離領域(Y)を通過した転写ベルト(+ 4)は、紙
粉除去ローラ(25)の接触部で、紙粉除去ローラ(2
5)で紙粉が除去される。
The transfer belt (+4) that has passed through the separation area (Y) is in contact with the paper dust removal roller (25),
Paper dust is removed in step 5).

そして、紙粉除去ローラ(25)に回収された紙粉は、
ブレード(27)で掻き取られて除去され、紙粉除去ロ
ーラ(25)か清掃される。従って、紙粉除去ローラ(
25)の紙粉除去性能は再生され、維持される。
The paper dust collected by the paper dust removal roller (25) is
The paper dust is removed by scraping with a blade (27), and the paper dust removal roller (25) is cleaned. Therefore, the paper dust removal roller (
25) The paper dust removal performance is regenerated and maintained.

なお、トナーの粒径は紙粉に比べて小さく、前記紙粉除
去ローラ(25)では大径の紙粉が主とし。
Note that the particle size of toner is smaller than paper dust, and the paper dust removal roller (25) mainly uses large-diameter paper dust.

て除去される。removed.

紙粉か除去された転写ベルト(14)は、ブレード(2
4)の先端でトナーが除去されて次回の転写に備える。
The transfer belt (14) from which paper dust has been removed is moved by the blade (2
4) The toner is removed at the tip in preparation for the next transfer.

ここで、転写ベルト(14)の表面から既に紙粉が除去
されているため、ブレード(24)の先端に紙粉か堆積
してブレード(24)の性能が低下するようなことはな
い。
Here, since paper dust has already been removed from the surface of the transfer belt (14), the performance of the blade (24) will not deteriorate due to paper dust accumulating on the tip of the blade (24).

ブレード(27)、(24)で掻き取られた紙粉、トナ
ーは回収ボックス(23)に落下回収され、回収ボック
ス(23)を適宜取り出して廃棄される。
The paper dust and toner scraped off by the blades (27) and (24) fall into a collection box (23) and are collected, and the collection box (23) is appropriately taken out and disposed of.

なお、回収ボックス(23)の上端開口部周囲にはマイ
ラシート(28)が取り付けてあり、トナー等に飛散が
防止されている。
A mylar sheet (28) is attached around the upper opening of the collection box (23) to prevent toner from scattering.

なお、前記実施例では、紙粉除去手段として紙粉除去ロ
ーラ(25)を設け、これを転写ベルト(1・1)に接
触させるものとしたが、半径方向のブラシを有するロー
ラを回転駆動させ、前記ブラシでトナーを除去するよう
にしてもよい。
In the above embodiment, a paper dust removing roller (25) was provided as a paper dust removing means, and this was brought into contact with the transfer belt (1, 1), but a roller having a radial brush was rotationally driven. , the toner may be removed using the brush.

(発明の効果) 以上の説明で明らかなように、本発明にかかる転写装置
では、転写ベルトの紙粉は紙粉除去手段により除去され
、その下流側に設けたトナー除去ブレードのトナー除去
能力を適正に維持することができる。
(Effects of the Invention) As is clear from the above description, in the transfer device according to the present invention, paper dust on the transfer belt is removed by the paper dust removal means, and the toner removal ability of the toner removal blade provided on the downstream side is improved. Can be maintained properly.

このため、転写ベルトからシートにトナーが付着するこ
とはなく、清潔なコピーを得ることができる。
Therefore, toner does not adhere to the sheet from the transfer belt, and clean copies can be obtained.

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

第1図は複写機の概略構成を示す断面図、第2図は転写
装置の概略断面図である。 ■・・・本体、2・・・開閉カバー、 3・・・感光体ドラム、13・・転写装置、14・・・
転写ベルト、15.〜.I9・・・ローラ、2I・・・
帯電チャーツヤ、22・・・クリーニング装置、23・
・・回収ボックス、2・1・・・ブレード、25・・紙
粉除去ローラ、27・・・ブレード。 特許出願人 ミノルタカメラ株式会社
FIG. 1 is a sectional view showing a schematic configuration of a copying machine, and FIG. 2 is a schematic sectional view of a transfer device. ■... Main body, 2... Opening/closing cover, 3... Photosensitive drum, 13... Transfer device, 14...
Transfer belt, 15. ~. I9...roller, 2I...
Charging chart, 22...Cleaning device, 23.
...Collection box, 2.1...Blade, 25...Paper dust removal roller, 27...Blade. Patent applicant Minolta Camera Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] (1)複数のローラに巻回された無端状の転写ベルトと
、該転写ベルトに電荷を付与する帯電手段とを備え、該
帯電手段で帯電された転写ベルトでシートを保持しなが
ら搬送し、静電潜像担体との対向部でその表面に保持さ
れているトナーを前記シートに転写する転写装置におい
て、 前記転写ベルトの回転方向に対して、トナーを転写され
たシートが転写ベルトから分離される領域より下流側で
、かつ、前記帯電手段の上流側に、転写ベルトに接触す
るブレードと、該ブレードの上流側に位置し、転写ベル
トの表面から紙粉を除去する紙粉除去手段と、を設けた
ことを特徴とする転写装置。
(1) comprising an endless transfer belt wound around a plurality of rollers and a charging means for applying an electric charge to the transfer belt, and conveying the sheet while holding it with the transfer belt charged by the charging means; In a transfer device that transfers the toner held on the surface of the electrostatic latent image carrier at a portion facing the electrostatic latent image carrier onto the sheet, the sheet to which the toner has been transferred is separated from the transfer belt with respect to the rotational direction of the transfer belt. a blade that contacts the transfer belt downstream of the area where the charging means is located and upstream of the charging means; and a paper dust removal means that is located upstream of the blade and removes paper dust from the surface of the transfer belt. A transfer device characterized by being provided with.
JP9425388A 1988-04-14 1988-04-14 Transfer device Pending JPH01263676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9425388A JPH01263676A (en) 1988-04-14 1988-04-14 Transfer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9425388A JPH01263676A (en) 1988-04-14 1988-04-14 Transfer device

Publications (1)

Publication Number Publication Date
JPH01263676A true JPH01263676A (en) 1989-10-20

Family

ID=14105131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9425388A Pending JPH01263676A (en) 1988-04-14 1988-04-14 Transfer device

Country Status (1)

Country Link
JP (1) JPH01263676A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10171270A (en) * 1996-12-09 1998-06-26 Ricoh Co Ltd Cleaner for transfer carrying-belt
EP0763786A3 (en) * 1995-09-13 1999-12-15 Toshiba Tec Kabushiki Kaisha Image forming apparatus
JP2006154195A (en) * 2004-11-29 2006-06-15 Brother Ind Ltd Image forming apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0763786A3 (en) * 1995-09-13 1999-12-15 Toshiba Tec Kabushiki Kaisha Image forming apparatus
EP2282239A2 (en) * 1995-09-13 2011-02-09 Toshiba TEC Kabushiki Kaisha Image forming apparatus and recovery of residual toner
EP2282239A3 (en) * 1995-09-13 2014-08-20 Toshiba TEC Kabushiki Kaisha Image forming apparatus and recovery of residual toner
JPH10171270A (en) * 1996-12-09 1998-06-26 Ricoh Co Ltd Cleaner for transfer carrying-belt
JP2006154195A (en) * 2004-11-29 2006-06-15 Brother Ind Ltd Image forming apparatus

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