JP2007155981A - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

Info

Publication number
JP2007155981A
JP2007155981A JP2005349089A JP2005349089A JP2007155981A JP 2007155981 A JP2007155981 A JP 2007155981A JP 2005349089 A JP2005349089 A JP 2005349089A JP 2005349089 A JP2005349089 A JP 2005349089A JP 2007155981 A JP2007155981 A JP 2007155981A
Authority
JP
Japan
Prior art keywords
photoreceptor
transfer belt
tape
intermediate transfer
forming apparatus
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.)
Granted
Application number
JP2005349089A
Other languages
Japanese (ja)
Other versions
JP4728786B2 (en
Inventor
Hirofumi Ogushi
浩文 大串
Atsushi Onose
敦士 小野瀬
Masahiko Saito
雅彦 斉藤
Katsumi Kumada
克巳 熊田
Hirobumi Kayano
博文 茅野
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.)
Ricoh Printing Systems Ltd
Original Assignee
Ricoh Printing Systems 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 Ricoh Printing Systems Ltd filed Critical Ricoh Printing Systems Ltd
Priority to JP2005349089A priority Critical patent/JP4728786B2/en
Publication of JP2007155981A publication Critical patent/JP2007155981A/en
Application granted granted Critical
Publication of JP4728786B2 publication Critical patent/JP4728786B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To solve such the problem wherein a marker tape and a reinforcing tape, stuck to a transfer belt of an intermediate transfer body, are brought into directly contact with a photoreceptor since the intermediate transfer body abuts on the photoreceptor, then the adhesive extruded from the end parts of the marker tape and the reinforcing tape is brought into contact with the photoreceptor and damages the photoreceptor, or to make the damages on the photoreceptor advanced. <P>SOLUTION: An image forming apparatus is provided with the photoreceptor, a plurality of developing units for supplying toner to the photoreceptor, the intermediate transfer body provided with the transfer belt for transferring and holding toner to/on the photoreceptor, and a transfer means for transferring a toner image from the intermediate transfer body to a printing medium, wherein the transfer belt has a marker tape and a reinforcing tape over the entire peripheries of both end parts of the transfer belt and a coat is applied at least onto adhesion parts of the marker tape, the reinforcing tape and the inside of the transfer belt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、中間転写体を備えた画像形成装置に関する。   The present invention relates to an image forming apparatus provided with an intermediate transfer member.

中間転写ベルト方式を採用した画像形成装置においては、高い転写性とトナー剥離性及び高い耐久性をもたすために転写ベルトには、ベルト基層にバインダー層と微粒子層の2層のコートが塗布されていることが公知である(例えば、特許文献1参照)。   In an image forming apparatus that employs an intermediate transfer belt system, a two-layer coating of a binder layer and a fine particle layer is applied to the transfer belt in order to provide high transferability, toner releasability, and high durability. It is publicly known (see, for example, Patent Document 1).

また、センサで読み取るマークを保護するためのコーティングする技術も知られている(例えば、特許文献23、3参照)。   In addition, a coating technique for protecting a mark read by a sensor is also known (see, for example, Patent Documents 23 and 3).

特開2004−354716号公報JP 2004-354716 A

特開2004−99248号公報JP 2004-99248 A

特開2004−262571号公報JP 2004-262571 A

中間転写体と感光体は、当接の関係にあり、中間転写体の転写ベルトに貼り付けているマーカテープまたは補強テープが直接感光体に接触し、マーカテープ及び補強テープの端部よりはみ出した接着剤が感光体に接触し、感光体を傷つけたり、また感光体上の傷を進行させてしまうという不具合があった。そこで、粘着テープの接着剤が、感光体に直接接触しないようにする必要があった。   The intermediate transfer member and the photosensitive member are in contact with each other, and the marker tape or the reinforcing tape attached to the transfer belt of the intermediate transfer member directly contacts the photosensitive member and protrudes from the end portions of the marker tape and the reinforcing tape. There is a problem in that the adhesive contacts the photoconductor and damages the photoconductor or advances the scratch on the photoconductor. Therefore, it was necessary to prevent the adhesive of the adhesive tape from directly contacting the photoreceptor.

本発明は、転写ベルトが感光体に接触する範囲において、転写ベルトに貼り付けているマーカテープ及び補強テープの端部からはみ出した接着剤を、転写ベルトにコートしているバインダー層または微粒子層を塗布することで、マーカテープ及び補強テープの接着剤を感光体に接触させない構造とすることを特徴とする。   The present invention provides a binder layer or a fine particle layer that coats the transfer belt with an adhesive protruding from the end of the marker tape and the reinforcing tape attached to the transfer belt in a range where the transfer belt contacts the photoconductor. By applying, the structure is characterized in that the adhesive of the marker tape and the reinforcing tape is not brought into contact with the photosensitive member.

本発明によれば、転写ベルトが、感光体に接触する範囲に、転写ベルトに貼り付けているマーカテープ及び補強テープの端部からはみだした接着剤を、バインダー層または微粒子層のコートを塗布することにより、接着剤を直接感光体に接触付着させることなく、感光体の傷つきを防ぐことができ、感光体の長寿命化が図れるとともに、安定した印刷品質の画像形成装置を提供することができる。   According to the present invention, a binder layer or a fine particle layer coat is applied to the adhesive belt protruding from the ends of the marker tape and the reinforcing tape attached to the transfer belt in a range where the transfer belt contacts the photoreceptor. As a result, it is possible to prevent the photosensitive member from being damaged without directly attaching the adhesive to the photosensitive member, to prolong the life of the photosensitive member, and to provide an image forming apparatus having a stable print quality. .

以下、本発明の実施例について図1〜図4を用いて説明する。   Embodiments of the present invention will be described below with reference to FIGS.

図4は、本発明の実施例の中間転写体を用いた画像形成装置1の断面図である。この装置は、中間転写体2を4回転させ、4色の画像を重ね合わせてカラー画像の形成が可能なカラーレーザプリンタである。以下、装置1内に配置される各ユニットについて説明する。   FIG. 4 is a cross-sectional view of the image forming apparatus 1 using the intermediate transfer member according to the embodiment of the present invention. This apparatus is a color laser printer capable of forming a color image by superimposing four color images by rotating the intermediate transfer member 2 four times. Hereinafter, each unit arrange | positioned in the apparatus 1 is demonstrated.

装置中央部に中間転写体2が配置されており、中間転写体2の周辺には、転写ベルト3と当接する感光体4、転写装置7が配置されている。また、感光体4の周辺には、帯電器6が配置されている。4色の異なる色の微小着色粉体であるトナーを封入した現像器8K,8Y,8M,8Cが重ねられて配置されており、その下方には露光装置9、また更にその下方には用紙を貯めておく用紙保持手段10、用紙供給装置11が配置されている。電子写真装置上部には、定着装置12が配置されている。   An intermediate transfer member 2 is disposed at the center of the apparatus, and a photosensitive member 4 that contacts the transfer belt 3 and a transfer device 7 are disposed around the intermediate transfer member 2. A charger 6 is disposed around the photoreceptor 4. Developers 8K, 8Y, 8M, and 8C enclosing toners, which are finely colored powders of four different colors, are arranged in an overlapping manner, with exposure device 9 below and a sheet below that. A paper holding means 10 and a paper supply device 11 for storing are arranged. A fixing device 12 is disposed above the electrophotographic apparatus.

上記構成において、帯電器6は感光体4の表面を一様に帯電させる。次にパソコン、イメージスキャナ等(図示せず)による画像、文字の情報を露光装置9によりドット単位で露光が行われ、感光体4であるOPCベルト5表面に静電潜像を形成させる。その後、静電潜像は、現像装置8K,8Y,8M,8Cのいずれかによりトナーが供給、現像されてトナー像として可視化され、第一転写位置T1へ搬送される。第一転写位置T1では、図示しない電源から供給される感光体4と中間転写体2との電位差により、トナー像が中間転写体2の表面へ転写される。上記工程を各現像装置8K〜8Cにより必要数繰り返すことにより、中間転写体2の表面には、画像、文字の情報に見合うトナー像が形成される。   In the above configuration, the charger 6 uniformly charges the surface of the photoreceptor 4. Next, image and character information by a personal computer, an image scanner or the like (not shown) is exposed in dot units by the exposure device 9, and an electrostatic latent image is formed on the surface of the OPC belt 5 that is the photoreceptor 4. Thereafter, the electrostatic latent image is supplied with toner by any of the developing devices 8K, 8Y, 8M, and 8C, developed, visualized as a toner image, and conveyed to the first transfer position T1. At the first transfer position T <b> 1, the toner image is transferred to the surface of the intermediate transfer body 2 due to a potential difference between the photoreceptor 4 and the intermediate transfer body 2 supplied from a power source (not shown). By repeating the above steps as many times as necessary by each of the developing devices 8K to 8C, a toner image corresponding to image and character information is formed on the surface of the intermediate transfer body 2.

その後、トナー像は第二転写位置T2で転写装置7によって、用紙供給装置11により用紙保持手段10から供給された用紙に転写される。トナー像を転写された用紙は、定着装置12に運ばれ、トナー像を用紙に定着し、用紙排出装置にて排出される。   Thereafter, the toner image is transferred to the paper supplied from the paper holding means 10 by the paper supply device 11 by the transfer device 7 at the second transfer position T2. The sheet on which the toner image has been transferred is conveyed to the fixing device 12, where the toner image is fixed on the sheet, and is discharged by the sheet discharge device.

次に、転写ベルト3の構成について説明する。   Next, the configuration of the transfer belt 3 will be described.

図3は、中間転写体2の転写ベルト3の構成図を表している。転写ベルト3には、転写ベルトの回転を検出するマーカテープaと補強テープbを転写ベルト3の全周にわたり貼り付けている。テープの材質は、PET、ポリエステル、不織布、アクリル等があるが、一般にPETが用いられる。また接着剤の材質には、一般的にアクリル系接着剤が用いられるが、他の接着剤を用いても良い。また、転写ベルト3には、バインダー層dと、微粒子層eの2層のコートを塗布している。バインダー層dは、バインダー樹脂材料をスプレーコーティングし、乾燥、硬化させ、ベルト基層とバインダー樹脂との密着性を確保する必要があるため、バインダー層の樹脂材料としては、塩化ビニル−酢酸ビニル共重合樹脂、ポリエステル樹脂、アクリル樹脂等があるが、密着性から塩化ビニル−酢酸ビニル共重合樹脂を用いている。次に微粒子層eは、トナーの感光体4から中間転写体2への転写、中間転写体2から紙への転写において、中間転写体2表面のトナー剥離性を向上する必要があり、表面にトナー剥離性を向上する微小粒子であるシリカやポリエステル樹脂、アクリル樹脂、フッ素樹脂等のトナーと付着しないものを基材としているが、耐久性、転写性からシリカを塗布している。   FIG. 3 illustrates a configuration diagram of the transfer belt 3 of the intermediate transfer body 2. A marker tape a and a reinforcing tape b for detecting the rotation of the transfer belt are attached to the transfer belt 3 over the entire circumference of the transfer belt 3. The material of the tape includes PET, polyester, non-woven fabric, acrylic, etc., but generally PET is used. In addition, an acrylic adhesive is generally used as the material of the adhesive, but other adhesives may be used. The transfer belt 3 is coated with two coats of a binder layer d and a fine particle layer e. Since the binder layer d needs to be spray-coated with a binder resin material, dried and cured to ensure adhesion between the belt base layer and the binder resin, vinyl chloride-vinyl acetate copolymer is used as the resin material for the binder layer. There are resin, polyester resin, acrylic resin, etc., but vinyl chloride-vinyl acetate copolymer resin is used from the viewpoint of adhesion. Next, the fine particle layer e needs to improve the toner releasability on the surface of the intermediate transfer body 2 in the transfer of the toner from the photoreceptor 4 to the intermediate transfer body 2 and the transfer from the intermediate transfer body 2 to the paper. The base material is silica, polyester resin, acrylic resin, fluororesin or the like that does not adhere to the toner, which is fine particles that improve toner releasability, but silica is applied from the viewpoint of durability and transferability.

次に、転写ベルト3のコーティングについて図1を用いて説明する。転写ベルト3が、感光体4のOPCベルト5と接触する範囲において、転写ベルト3に貼り付けているマーカテープa及び補強テープbの内側の端部からはみ出した接着剤が、直接OPCベルト5に接触しないようにするために、転写ベルト3には、バインダー層d或いは、微粒子層eの少なくとも1層のコートをスプレー塗布している。コートの塗布は、バインダー層d及び微粒子層eの2層であっても構わない。また、転写ベルト3へのバインダー層d或いは、微粒子層eのコートは、転写ベルト3が、OPCベルトに接触している範囲まで塗布されていれば良い。
次に、スプレー塗布の範囲について、具体的に図2を用いて説明する。転写ベルト3に貼り付けているマーカテープa及び補強テープbの内側の端部が、OPCベルト5と接触する場合には、マーカテープa及び補強テープbの内側の端部よりはみ出した接着剤が、OPCベルト5に接触するため、転写ベルト3へのバインダー層d或いは、微粒子層eのコートは、転写ベルト3のマーカテープa及び補強テープbの内側端部を越えた範囲まで塗布されていれば良い。
Next, the coating of the transfer belt 3 will be described with reference to FIG. In the range where the transfer belt 3 is in contact with the OPC belt 5 of the photoreceptor 4, the adhesive protruding from the inner ends of the marker tape a and the reinforcing tape b attached to the transfer belt 3 is directly applied to the OPC belt 5. In order to avoid contact, the transfer belt 3 is spray-coated with at least one coat of the binder layer d or the fine particle layer e. The coating may be applied in two layers, ie, a binder layer d and a fine particle layer e. Further, the coating of the binder layer d or the fine particle layer e on the transfer belt 3 may be applied to the extent that the transfer belt 3 is in contact with the OPC belt.
Next, the range of spray coating will be specifically described with reference to FIG. When the inner ends of the marker tape a and the reinforcing tape b attached to the transfer belt 3 are in contact with the OPC belt 5, the adhesive protruding from the inner ends of the marker tape a and the reinforcing tape b is removed. In order to come into contact with the OPC belt 5, the coating of the binder layer d or the fine particle layer e on the transfer belt 3 may be applied to the range beyond the inner ends of the marker tape a and the reinforcing tape b of the transfer belt 3. It ’s fine.

本発明に関わる画像形成装置の転写ベルトのコート塗布領域説明図である。FIG. 4 is an explanatory diagram of a coat application area of a transfer belt of the image forming apparatus according to the present invention. 本発明に関わる画像形成装置の転写ベルトのコート塗布領域説明図である。FIG. 4 is an explanatory diagram of a coat application area of a transfer belt of the image forming apparatus according to the present invention. 本発明に関わる画像形成装置の転写ベルトの構成図である。FIG. 2 is a configuration diagram of a transfer belt of an image forming apparatus according to the present invention. 本発明に関わる画像形成装置の断面側面図である。1 is a cross-sectional side view of an image forming apparatus according to the present invention.

符号の説明Explanation of symbols

1…画像形成装置、2…中間転写体、3…転写ベルト、4…感光体、5…OPCベルト、6…帯電器、7…転写装置、8K,8Y,8M、8C…現像器、9…露光装置、10…用紙保持手段、11…用紙供給装置、12…定着器。
DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 2 ... Intermediate transfer body, 3 ... Transfer belt, 4 ... Photoconductor, 5 ... OPC belt, 6 ... Charger, 7 ... Transfer device, 8K, 8Y, 8M, 8C ... Developer, 9 ... Exposure device, 10... Paper holding means, 11... Paper supply device, 12.

Claims (2)

感光体と、前記感光体にトナーを供給する複数の現像器と、前記感光体上のトナーを転写し保持する転写ベルトを備えた中間転写体と、前記中間転写体から印刷媒体へ転写する転写手段とを有する画像形成装置において、
前記転写ベルトは両端部の全周にマーカテープ及び補強テープを有し、少なくとも前記マーカテープ及び補強テープと前記転写ベルトの内側の接着部にコートを塗布したことを特徴とする画像形成装置。
A photosensitive member, a plurality of developing devices for supplying toner to the photosensitive member, an intermediate transfer member having a transfer belt for transferring and holding the toner on the photosensitive member, and a transfer for transferring the intermediate transfer member to a printing medium. An image forming apparatus comprising:
2. The image forming apparatus according to claim 1, wherein the transfer belt has a marker tape and a reinforcing tape on the entire circumference of both end portions, and a coat is applied to at least the marker tape and the reinforcing tape and an adhesive portion inside the transfer belt.
前記コートは、前記マーカテープ及び補強テープの内側端部を越えた範囲まで塗布されていることを特徴とする前記請求項1記載の画像形成装置。
The image forming apparatus according to claim 1, wherein the coating is applied to a range beyond the inner ends of the marker tape and the reinforcing tape.
JP2005349089A 2005-12-02 2005-12-02 Image forming apparatus Expired - Fee Related JP4728786B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005349089A JP4728786B2 (en) 2005-12-02 2005-12-02 Image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005349089A JP4728786B2 (en) 2005-12-02 2005-12-02 Image forming apparatus

Publications (2)

Publication Number Publication Date
JP2007155981A true JP2007155981A (en) 2007-06-21
JP4728786B2 JP4728786B2 (en) 2011-07-20

Family

ID=38240446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005349089A Expired - Fee Related JP4728786B2 (en) 2005-12-02 2005-12-02 Image forming apparatus

Country Status (1)

Country Link
JP (1) JP4728786B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0863000A (en) * 1994-08-26 1996-03-08 Fuji Xerox Co Ltd Image forming device
JPH11160928A (en) * 1997-11-29 1999-06-18 Fuji Xerox Co Ltd Image forming device using endless belt
JP2005266519A (en) * 2004-03-19 2005-09-29 Fuji Xerox Co Ltd Fixing belt and image forming apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0863000A (en) * 1994-08-26 1996-03-08 Fuji Xerox Co Ltd Image forming device
JPH11160928A (en) * 1997-11-29 1999-06-18 Fuji Xerox Co Ltd Image forming device using endless belt
JP2005266519A (en) * 2004-03-19 2005-09-29 Fuji Xerox Co Ltd Fixing belt and image forming apparatus

Also Published As

Publication number Publication date
JP4728786B2 (en) 2011-07-20

Similar Documents

Publication Publication Date Title
US8346147B2 (en) Fixing unit and image forming apparatus
JP5780266B2 (en) Image forming apparatus and powder coating apparatus
JP2002123052A (en) Image forming apparatus
JP2006058527A (en) Fixing device and image forming apparatus
JP4075329B2 (en) Fixing device and image forming apparatus using the same
JP4051897B2 (en) Fixing device and image forming apparatus using the same
JP2006317492A (en) Fixing separation plate, fixing device and image forming apparatus
JP2004184462A (en) Cleaning apparatus and image forming apparatus using the same
JP4728786B2 (en) Image forming apparatus
JP4051858B2 (en) Image forming apparatus
JP2004013034A (en) Image forming device
JP2005221936A (en) Image forming apparatus
WO2001022173A1 (en) Electrophotographic image forming device, intermediate transfer body and electrophotograpic image forming method
JP2006201228A (en) Image forming apparatus
JP2002072687A (en) Developing apparatus
JPS6388582A (en) Transfer device
KR100199475B1 (en) Electronic photographic mode developing systems for preventing rolling to a sensitization drum
JP4068704B2 (en) Color image forming method
JP2010169756A (en) Intermediate transfer belt
JP2008083417A (en) Developing method, developing device, and image forming method
JP2010008729A (en) Image forming device
JP2006084574A (en) Cleaning device and image forming apparatus
JP2003195667A (en) Image forming apparatus
JP2002372884A (en) Fixing device and image forming device using the same
JP2000112283A (en) Transfer material peeling member

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080811

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20081028

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101213

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110104

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110225

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110412

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110415

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140422

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees