JPS5995563A - Recording device - Google Patents
Recording deviceInfo
- Publication number
- JPS5995563A JPS5995563A JP20588582A JP20588582A JPS5995563A JP S5995563 A JPS5995563 A JP S5995563A JP 20588582 A JP20588582 A JP 20588582A JP 20588582 A JP20588582 A JP 20588582A JP S5995563 A JPS5995563 A JP S5995563A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- rotating body
- toner image
- roll
- intermediate transfer
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
- G03G15/161—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、トナー像を保持する感光体ドラム等の像保持
体と、この像保持体上のトナー像を転写せしめかつこの
転写トナー像を記録紙等の次の転写材へ更に転写する例
えばベルト状の中間転写体とを有し、前記転写材への転
写部が転写用回転体(例えばロール)とこれに圧接され
る圧接回転体(例えばロール)とによって構成されてい
る記録装置、特に静電記録又は電子写真複写装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image carrier such as a photoreceptor drum that holds a toner image, a toner image on the image carrier, and a method for transferring the toner image onto a recording paper or the like. It has an intermediate transfer body, for example, in the form of a belt, which further transfers the image to the transfer material, and the transfer part to the transfer material is constituted by a transfer rotary body (for example, a roll) and a pressing rotary body (for example, a roll) that is pressed against the transfer body. The invention relates to recording devices, in particular electrostatic recording or electrophotographic copying devices.
従来、静電記録、電子写真等の記録装置においては、感
光体ドラム等の像保持体上に静電荷像を形成し、これを
トナーおよび必要に応じてキャリアを混合した現像剤に
よって現像し、得らnたトナー像を例えば静電的に転写
シート上に転写し、更に定着するというプロセスに基づ
いて画像を形成している。Conventionally, in recording devices such as electrostatic recording and electrophotography, an electrostatic charge image is formed on an image carrier such as a photoreceptor drum, and this is developed with a developer mixed with toner and carrier as necessary. An image is formed based on a process in which the obtained toner image is transferred, for example, electrostatically onto a transfer sheet and further fixed.
しかしながらトナー像を例えばコロナ放電器のような転
写電極によって静電的に転写シート(記録材)上に転写
する場合、電荷の乱れが伴い、トナー像の解像力が低下
してしまう。また、トナーとして例えば、近時推奨され
ている導電性磁性トナーなどを用いた場合には、一層の
電荷の乱れを生じ、実質的に転写不可能な状態を招く。However, when a toner image is electrostatically transferred onto a transfer sheet (recording material) using a transfer electrode such as a corona discharger, charge disturbance occurs and the resolution of the toner image is reduced. Furthermore, when a conductive magnetic toner, which has been recently recommended, is used as the toner, further charge disturbance occurs, resulting in a state in which transfer is virtually impossible.
上記した静電転写による欠点を改良する方法として、例
えば押圧ロールなどを用いて転写シート上に抑圧転写す
る方法も試みられたが、転写効率が悪く、トナー像は約
半分の量しか転写されないなどの障害がある。As a method to improve the above-mentioned drawbacks of electrostatic transfer, attempts have been made to suppress transfer onto a transfer sheet using a pressure roll, etc., but the transfer efficiency is poor and only about half the amount of toner image is transferred. There is a disability.
そこで、例えば特公昭46−41679号公報、特公昭
48−22763号公報、特開昭49−78559号公
報および米国特許第3.993.825号明細書等にお
いて、ゴムを転写層とする中間転写体に上記トナー像を
抑圧転写し、この転写されたトナー像を加熱ロールを用
いてその加熱溶融下に転写シート上に抑圧転写、定N(
転写定着)する方法が提案されている。かかる方法にお
いては、例えばシリコーンゴムまたは弗素ゴムの如く、
一方では離型性を有すると共に他方では抑圧時に微粒子
体を付着する性質を有するゴム系の転写層の表層にトナ
ー像が押圧転写され、この転写層上のトナー像は加熱ロ
ールなどの加熱体と接触加熱されて溶融し、同時に給送
された転写シート上に押圧転写され、定着される。即ち
、加熱により溶融したトナー像は転写層のもつ上記離型
性に基づき容易に転写シート上に転写、定着されるから
、転写工程によるトナー像の解像力の低下がなく、しか
も高い転写率で転写が実現されるとしている。Therefore, for example, in Japanese Patent Publication No. 46-41679, Japanese Patent Publication No. 48-22763, Japanese Unexamined Patent Publication No. 49-78559, and US Pat. No. 3.993.825, intermediate transfer using rubber as a transfer layer is The above-mentioned toner image is compressed and transferred onto the transfer sheet, and the transferred toner image is heated and melted using a heating roll, and then compressed and transferred onto the transfer sheet at a constant N (
A method of transferring (transfer fixing) has been proposed. In such a method, for example silicone rubber or fluoro rubber,
The toner image is pressure-transferred onto the surface layer of a rubber-based transfer layer that has releasability on the one hand and has the property of adhering fine particles when pressed on the other hand, and the toner image on this transfer layer is transferred to a heating body such as a heating roll. The image is heated and melted by contact, and is transferred under pressure onto a transfer sheet fed at the same time and fixed. In other words, the toner image melted by heating is easily transferred and fixed onto the transfer sheet based on the above-mentioned releasability of the transfer layer, so there is no reduction in the resolution of the toner image due to the transfer process, and moreover, the transfer rate is high. is expected to be realized.
この公知の記録装置においては、上記転写定着部は加熱
ロール(これは中間転写体を兼ねることがある。)とこ
れに圧接される圧接ロールとで構成され、これら両ロー
ル間に必要に応じてベルト状中間転写体と、記録紙(転
写シート)とが挟着されながら通されることによシ、中
間転写ベルト上のトナー像が記録紙上に転写定着される
。この場合、圧接ロール側にも熱源を配し、両ロールを
加熱しながら操作すれば、転写定着に充分な温度に中間
転写体及び記録紙を保持できるから、転写定着性を向上
させる上で1つの優れた方策とな9得る。In this known recording device, the transfer and fixing section is composed of a heating roll (which may also serve as an intermediate transfer member) and a pressure roll that is pressed against the heating roll, and a pressure roller is placed between these rolls as necessary. By passing the belt-shaped intermediate transfer member and recording paper (transfer sheet) while being sandwiched therebetween, the toner image on the intermediate transfer belt is transferred and fixed onto the recording paper. In this case, by placing a heat source on the pressure roll side and operating while heating both rolls, it is possible to maintain the intermediate transfer body and the recording paper at a temperature sufficient for transfer and fixation, which is an effective method for improving transfer and fixation properties. This is a great way to get 9 results.
ところが、この両ロール加熱方式の場合、本発明者は次
の如き問題点があることを見出した。即ち、各ロールの
熱源に供給される電力は太きいために、同時に各熱源に
電力を供給してしまうと過大な電流が流れ、大きな電源
容量が必要となってしまう。このことは、特に複写動作
時においてコピー釦のオン後の感光体ドラムの回転中に
、露光ランプ等に大きな電力を供給しなければならない
ことからみて非常に不都合である。何故ならば、複写動
作中の消費電力が非常に大きくなって通常以上の電源容
量が必要となるから、一般の家庭用電源では不充分とす
り、このために複写装置の使用範囲が制限され、その実
用性が制約を受けることになる。However, in the case of this double roll heating method, the present inventors have found that there are the following problems. That is, since the power supplied to the heat source of each roll is large, if power is supplied to each heat source at the same time, an excessive current will flow and a large power supply capacity will be required. This is extremely inconvenient, especially during copying operations, since a large amount of power must be supplied to the exposure lamp and the like while the photosensitive drum is rotating after the copy button is turned on. This is because the power consumption during the copying operation becomes extremely large and requires a larger power supply capacity than normal, so a general household power supply is insufficient, and this limits the scope of use of the copying machine. Its practicality will be limited.
本発明者は2上記した状況に検討を加えた結果、上記の
如き両ロール加熱方式においては次の特殊な現象が生じ
ていることが判明した。即ち、上記両ロールのうち一方
(例えば圧接ロール)の温度は上記の転写定着性を決め
(若しくは支配し)、他方のロール(例えば中間転写体
を兼ねる加熱ロール)の温度は転写定着性を促進する補
助的なものであって、特に複写動作中は圧接ロールの温
度によって加熱ロールがある程度の(つまシ、転写定着
性を補助するのに必要な)温度に加熱され得ることであ
る。これは、加熱ロールが熱容量の大きい材料からなっ
ている場合に顕著に生じる現象でちる。As a result of considering the above-mentioned situation, the inventors of the present invention have found that the following special phenomenon occurs in the double-roll heating method as described above. That is, the temperature of one of the two rolls (for example, the pressure roll) determines (or controls) the above-mentioned transfer fixing properties, and the temperature of the other roll (for example, the heating roll that also serves as an intermediate transfer member) promotes the transfer fixing properties. Particularly during the copying operation, the heating roll can be heated to a certain temperature (necessary for assisting the transfer and fixing properties) by the temperature of the pressure roll. This is a phenomenon that occurs significantly when the heating roll is made of a material with a large heat capacity.
本発明は、こうした知見に基づいてなされたものであっ
て、特に複写等の記録動作時に多くの電力を消費するこ
となくして、転写材への転写性(更には定着性)を良好
に行なえ、実用性の充分ある記録装置を提供することを
目的とするものである。The present invention has been made based on these findings, and it is possible to achieve good transferability (and fixation) to a transfer material without consuming a large amount of power, especially during recording operations such as copying. The purpose of this invention is to provide a recording device with sufficient practicality.
この目的は、冒頭に述べた記録装置において、前記転写
用回転体と前記圧接回転体との双方に熱源(例えば内蔵
されたヒータランプ)及び両回転体の表面温度を検知す
る温度検知部が夫々配されると共に、前記両回転体を夫
々温度制御するとき、記録動作中には双方の熱源が同時
にオンされないように構成されたことを特徴とする記録
装置によって達成される。The purpose of this is to provide a heat source (for example, a built-in heater lamp) in both the transfer rotary body and the pressure contact rotary body and a temperature detection unit that detects the surface temperature of both rotary bodies in the recording apparatus mentioned at the beginning. This is achieved by a recording apparatus characterized in that, when controlling the temperature of both of the rotating bodies, both heat sources are not turned on at the same time during a recording operation.
本発明によれば、複写動作中は、転写用回転体と圧接回
転体との双方の熱源が同時にオンすることかないよう構
成されているから、同時に熱源がオンされる場合よシも
電源容量を小さくすることができるのである。According to the present invention, during the copying operation, the heat sources of both the transfer rotary body and the pressure rotary body are configured so as not to be turned on at the same time. It can be made smaller.
電気製品が電源と接続されたときに流れる初期電流は、
通常の電流よ92〜5倍もの多くの電流が流れる。本記
録装置において電力を主に消費するのは、露光ランプ、
転写用回転体と圧接回転体の熱源である。複写中で露光
ランプが点灯し、その上転写用回転体と圧接回転体の熱
源を同時にオンさせようとした場合、必要な全電流を流
すのに充分な電源容量は、相当大きくなる。特に、露光
中に回転体の熱源がオンすると突入電流のため、通常電
流の数倍以上の電流が流れ、電源容量に余裕がないとき
は露光ランプの光量が変動し、画像に乱れが生じてしま
う。そこで、複写中で露光ランプが点灯しているときに
は、転写用回転体及び圧接回転体の熱源をオンするタイ
ミングをずらすこととし、側熱源に同時に初期(突入)
電流が流れるのを防止せんとしたのである。このように
すれば電源容量を小さくし、本装置の実用性を高めるこ
とかできる。The initial current that flows when an electrical product is connected to a power source is
92 to 5 times more current flows than normal current. The main power consumption in this recording device is the exposure lamp,
This is the heat source for the transfer rotating body and the pressing rotating body. If the exposure lamp is turned on during copying and the heat sources of the transfer rotary body and the pressure contact rotary body are to be turned on at the same time, the power supply capacity sufficient to flow the entire necessary current becomes considerably large. In particular, when the heat source of the rotating body is turned on during exposure, an inrush current flows that is several times the normal current, and if there is not enough power supply capacity, the light intensity of the exposure lamp fluctuates, causing disturbances in the image. Put it away. Therefore, when the exposure lamp is on during copying, we decided to shift the timing of turning on the heat sources of the transfer rotary body and the pressure rotary body, so that the side heat sources are turned on at the same time.
The idea was to prevent current from flowing. In this way, the power supply capacity can be reduced and the practicality of the device can be increased.
以下、本発明を実施例について図面参照下に詳細に説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.
まず第1図について、中間転写体として中間転写ベルト
を有する記録装置の概略を説明する。この記録装置にお
いては、回転ドラム型の感光体ドラム等のトナー像保持
体1の外周面に沿った領域において、公知の潜像形成機
構2、現像機構3及びクリーニング機構4が回転方向に
順次膜けらtている。現像機構3とクリーニング機構4
との間の転写領域Aにおいて、エンドレスベルトより成
る中間転写体5が抑圧(転写)ロール6によシ上記トナ
ー像保持体1の外周面に押圧される。中間転写ベルト5
は、第2図に明示するように、ポリイミド等の可撓性フ
ィルム基板か上に粘着性のおる例えばシリコーンゴム層
21が塗布されたものからなっている。上記中間転写ベ
ルト5は、押圧ロール6のほか、加熱ロール7とテンシ
ョンローラー8とに架は渡され、上記転写領域Aにおい
てトナー像保持体1と同方向に等速で移動されて加熱ロ
ール7における中間転写体加熱領域Bに向う。First, referring to FIG. 1, an outline of a recording apparatus having an intermediate transfer belt as an intermediate transfer body will be explained. In this recording apparatus, a known latent image forming mechanism 2, a developing mechanism 3, and a cleaning mechanism 4 sequentially form a film in the rotational direction in a region along the outer peripheral surface of a toner image holding body 1 such as a rotating drum type photoreceptor drum. I'm angry. Developing mechanism 3 and cleaning mechanism 4
In the transfer area A between the toner image carrier 1 and the toner image carrier 1, an intermediate transfer member 5 made of an endless belt is pressed against the outer circumferential surface of the toner image carrier 1 by a suppression (transfer) roll 6. Intermediate transfer belt 5
As clearly shown in FIG. 2, it consists of a flexible film substrate made of polyimide or the like, on which an adhesive layer 21, for example silicone rubber, is coated. The intermediate transfer belt 5 is passed over a heating roll 7 and a tension roller 8 in addition to a pressure roll 6, and is moved at a constant speed in the same direction as the toner image carrier 1 in the transfer area A. toward the intermediate transfer body heating area B in .
また、テンションローラー8に対向してクリーニングロ
ーラー12が配され、更にベルト5の帯電を防ぐ除電ブ
ラシ等の除電部材13が設けられている。Further, a cleaning roller 12 is disposed opposite to the tension roller 8, and a charge eliminating member 13 such as a charge eliminating brush that prevents the belt 5 from being charged is further provided.
加熱ロール7における上記中間転写ベルト5の離脱点又
はその近傍における転写定着領域Cにおいては、当該ロ
ール7に押圧されるように圧接ロール9が設けられてい
る。この転写定着領域Cを通過するよう設定された、記
録紙よ構成る転写材の転写材移動路Pにおける上記転写
定着領域Cの直前の転写材加熱領域りに沿って、転写材
加熱板10が配置されている。In the transfer and fixing area C at or near the separation point of the intermediate transfer belt 5 on the heating roll 7 , a pressure roll 9 is provided so as to be pressed against the roll 7 . A transfer material heating plate 10 is installed along the transfer material heating area immediately before the transfer fixing area C in the transfer material movement path P of the transfer material constituted by recording paper, which is set to pass through the transfer fixing area C. It is located.
以上のような構成の装置を用い、本例においては、次の
ようにしてトナー像保持体上に形成したトナー像を最終
的に転写材に転写定着せしめる。Using the apparatus configured as described above, in this example, the toner image formed on the toner image carrier is finally transferred and fixed onto the transfer material in the following manner.
先ずトナー像保持体1上のトナー像Tは、潜像形成機構
2により形成された潜像を現像機構3により現像するこ
とによって形成される。即ち、電子写真法を利用する場
合においては、トナー像保持体1は、セレン系、有機化
合物系、酸化亜鉛又は硫化カドミウム系の/(インダー
型、その他の電子写真感光体によシ構成され、潜像形成
機構2によシ、トナー像保持体1の外周面を全面帯電せ
しめた後画像露光を行なうことにより静電潜像を形成す
る。又、静電記録法を利用する場合には、トナー像保持
体1を導電性基体と誘電体表面層より成る誘電体によシ
構成し、画像信号をマルチスタライス電極又はイオン制
御電極によシ静電潜像に変換することにより潜像を形成
せしめる。又、磁気記録法を利用する場合には、トナー
像担持体1を磁性体により構成し、画像信号を磁化へ・
ンドにより磁気信号に変換して磁気潜像を形成してもよ
い。First, the toner image T on the toner image holding member 1 is formed by developing a latent image formed by the latent image forming mechanism 2 with the developing mechanism 3. That is, when electrophotography is used, the toner image carrier 1 is composed of a selenium-based, organic compound-based, zinc oxide, or cadmium sulfide-based/(inder type) or other electrophotographic photoreceptor; The latent image forming mechanism 2 charges the entire outer peripheral surface of the toner image carrier 1 and then performs image exposure to form an electrostatic latent image.Furthermore, when electrostatic recording is used, The toner image carrier 1 is constructed of a dielectric material consisting of a conductive substrate and a dielectric surface layer, and a latent image is formed by converting an image signal into an electrostatic latent image using a multi-starlice electrode or an ion control electrode. In addition, when using a magnetic recording method, the toner image carrier 1 is made of a magnetic material, and the image signal is transferred to the magnetization.
The magnetic signal may be converted into a magnetic signal by a command to form a magnetic latent image.
このようにして形成された潜像は、それが静電潜像であ
る場合には、現像機構3によシ、潜像を形成する電荷と
反対極性に帯電された着色荷電粒子であるトナーにより
可視像とされる。ここに使用されるトナーが一成分導電
性磁性トナーである場合には、トナーに誘起された電荷
によシ現像される。−成分導電性磁性トナーを使用し磁
気プラシ現像法を用いた場合には、トナ一層が単−粒子
層又はそれに近い薄層として形成されるので、最終的に
得られる画像の画質、耐久性、高速現像性において優れ
、又転写材を選択することなく良好な転写が可能である
点で特に好ましい。潜像が磁気潜像である場合には、磁
性トナーによシ現像すればよく、転写時の画像のにじみ
の発生を防止することができて鮮明な画像が得られる。If the latent image formed in this way is an electrostatic latent image, it is transferred to the developing mechanism 3 by toner, which is colored charged particles charged to the opposite polarity to the charge forming the latent image. It is considered a visible image. When the toner used here is a one-component conductive magnetic toner, the toner is developed by an electric charge induced in the toner. - Component When a conductive magnetic toner is used and a magnetic brush development method is used, one layer of the toner is formed as a single particle layer or a thin layer close to it, so the image quality and durability of the final image are improved. It is particularly preferred because it has excellent high-speed developability and allows good transfer without selecting a transfer material. When the latent image is a magnetic latent image, it is sufficient to develop it with magnetic toner, and it is possible to prevent the occurrence of blurring of the image during transfer and to obtain a clear image.
以上のようにして形成されたトナー像担持体1上のトナ
ー像Tを、転写領域Aにおいて中間転写ベルト5上に押
圧ローラ6の押圧力により転写せしめる。The toner image T formed on the toner image carrier 1 as described above is transferred onto the intermediate transfer belt 5 in the transfer area A by the pressing force of the pressing roller 6.
中間転写ベルト5の粘着層、特にシリコーンゴム層は、
低温では表面の適度な粘着性とトナーを包含するゴム弾
性とKよシ、転写領域Aにおいて、トナー像保持体1の
トナー保持力に打ち勝って中間転写体側にトナーを充分
に捕獲することができる。また、シリコーンゴム層の表
面エネルギーは通常の転写材材料に比して充分に小さい
ものであるため、後述する転写定着領域Cにおいて、ト
ナーの転写材側の表面から当該トナーが加熱されて流動
性を帯びた状態で転写材が圧接せしめられると、トナー
は転写材に強く付着するようになって転写材へ殆ど完全
に転写定着されるようになる。The adhesive layer of the intermediate transfer belt 5, especially the silicone rubber layer,
At low temperatures, the moderate adhesiveness of the surface, the rubber elasticity that contains the toner, and the K resistance can overcome the toner retention force of the toner image carrier 1 in the transfer area A and sufficiently capture toner on the intermediate transfer body side. . In addition, since the surface energy of the silicone rubber layer is sufficiently small compared to normal transfer material materials, the toner is heated from the surface of the transfer material side in the transfer fixing area C, which will be described later, and the toner becomes fluid. When the transfer material is brought into pressure contact with the toner, the toner strongly adheres to the transfer material and is almost completely transferred and fixed onto the transfer material.
加熱ロール7は、中空のアルミニウム等の金属ロール内
に例えば赤外線ランプ等よ構成るヒータ7Aを内蔵する
ものであシ、この金属ロールの表面を適当な範囲の温度
に制御する。これにより中間転写ベルト5との接触開始
点Eと、転写定着領域Cとの間の領域、即ち中間転写体
加熱領域Bにおいて中間転写ベルト5及びその上のトナ
ー像Tを加熱し、領域Cでのトナー像の転写定着性が充
分となるようにしている。転写定着領域Cにおける圧接
ロール9は、転写定着性をよシ向上させる補助加熱ロー
ルとして構成され、シリコーン系ゴムなどの表層を設け
た耐熱性弾性ロールであってヒーターランプ9人を内蔵
したものが使用される。The heating roll 7 is a hollow metal roll made of aluminum or the like and has a built-in heater 7A, such as an infrared lamp, to control the temperature of the surface of the metal roll within an appropriate range. As a result, the intermediate transfer belt 5 and the toner image T thereon are heated in the area between the contact start point E with the intermediate transfer belt 5 and the transfer fixing area C, that is, the intermediate transfer body heating area B, and the toner image T on the intermediate transfer belt 5 is heated in the area C. The toner image has sufficient transfer and fixing properties. The pressure roll 9 in the transfer fixing area C is configured as an auxiliary heating roll to improve the transfer fixing property, and is a heat-resistant elastic roll with a surface layer made of silicone rubber or the like, and is equipped with nine built-in heater lamps. used.
又、図示の例における転写材加熱板10は、圧接ロール
9の外周面に沿って接触するよう適合する形状を有し、
上記転写材を、圧接ロール90表面と転写材加熱板10
との間を通過せしめるときに、転写材加熱板10により
、転写定着領域Cにおいて中間転写体5上のトナー像が
当該転写材に充分に転写定着される程度にその表面を接
触加熱する。ここに圧接ロール90表面の摩擦係数は転
写材加熱板100表面のそれよりも大きくし、従って圧
接ロール90回転による表面の移動にともない、固定さ
れた転写材加熱板100表面を転写材が摺動して接触加
熱され、転写定着領域Cへ搬送される。このようにして
予備加熱された転写材は、転写定着領域Cにおいて、予
め熱ロール7によりトナー像と共に加熱された中間転写
ベルト5と圧接ロール9によシ挾まれて圧接され、これ
によシ、トナー像のトナーが加熱によシ流動性を帯びた
状態で圧接されるため、転写材上に確実に転写定着され
る。Further, the transfer material heating plate 10 in the illustrated example has a shape that is adapted to contact along the outer peripheral surface of the pressure roll 9,
The transfer material is placed between the surface of the pressure roll 90 and the transfer material heating plate 10.
When the transfer material is passed between the intermediate transfer member 5 and the intermediate transfer member 5, the transfer material heating plate 10 contacts and heats the surface of the intermediate transfer member 5 in the transfer fixing area C to such an extent that the toner image on the intermediate transfer member 5 is sufficiently transferred and fixed to the transfer material. Here, the coefficient of friction on the surface of the pressure roll 90 is made larger than that on the surface of the transfer material heating plate 100, so that as the surface moves due to the rotation of the pressure roll 90, the transfer material slides on the fixed surface of the transfer material heating plate 100. It is then heated by contact and conveyed to the transfer and fixing area C. In the transfer fixing area C, the transfer material preheated in this way is sandwiched and pressed between the intermediate transfer belt 5, which has been previously heated together with the toner image by the heat roll 7, and the pressure roller 9, whereby the transfer material is pressed. Since the toner of the toner image is heated and pressed in a fluid state, it is reliably transferred and fixed onto the transfer material.
転写定着領域CI通過した転写材は通常、中間転写ベル
ト5に沿って搬送され、テンションローラー8により中
間転写ベルト5より分離される。The transfer material that has passed through the transfer fixing area CI is normally conveyed along the intermediate transfer belt 5 and separated from the intermediate transfer belt 5 by a tension roller 8 .
ここで、テンションローラー8の径を小さくしておくと
、転写材の中間転写ベルト5よシの分離を容易に行なう
ことができるが、更に揺動せしめることにより中間転写
ベルト5の偏倚を防止することもできる。転写定着領域
Cを通過した中間転写ベルト5は一部自然冷却され、再
び転写領域Aにおいて転写を受け、更に転写定着領域C
において転写定着プロセスを繰シ返す。Here, if the diameter of the tension roller 8 is made small, it is possible to easily separate the transfer material from the intermediate transfer belt 5, but by making it swing further, the biasing of the intermediate transfer belt 5 can be prevented. You can also do that. The intermediate transfer belt 5 that has passed through the transfer and fixing area C is partially naturally cooled, undergoes transfer again in the transfer area A, and is further transferred to the transfer and fixing area C.
The transfer and fixing process is then repeated.
図中、11はクリーニングローラーであって、圧接ロー
ル9にトナーが付着したときにこれを除去するものであ
る。In the figure, reference numeral 11 denotes a cleaning roller, which removes toner when it adheres to the pressure roll 9.
中間転写ベルト5、トナー及び転写材の三者を共に加熱
するだめ、その各々における必要な加熱温度を低下せし
めることが可能となり、これによってその各々を過度に
加熱することが不要となシ、しかも逃散する熱量を小さ
く抑制することができて全体の熱利用率を大幅に向上せ
しめることができることも加わって、全消費エネルギー
を大幅に減少せしめることができる。又、トナー像の転
写定着を高速で行なうことが可能となる。また、中間転
写ベルト5は過度に加熱されないから、トナー像保持体
1が光導電性感光体のような、その基本特性において熱
に対して繊細な性質を有するものであってもその良好な
特性を阻害することがなく、或いは中間転写ベルト5の
材料成分の一部がトナー像保持体1に付着すること等の
不都合を防止することができると共に、中間転写ベルト
5が高温に加熱されず、又激しい温度変化に曝されない
ことによシその耐久性を長期間に亘って保有せしめるこ
とができ、或いは轟該中間転写ベルト5の材質に必要と
される耐熱性の条件が緩和され、材質の選択範囲が拡大
されてコストの低下を図ることができる。又、トナーが
過度に加熱されることがなく、トナーの流動性が過大に
なることによる画像のにじみ或いはオフセット現象が生
ずることがない。加えて、転写材も過度に加熱されるこ
とがなく、転写材の熱変形及びしわも発生せず、当然の
ことながら火災の危険性も事実上皆無とすることができ
る。By heating the intermediate transfer belt 5, the toner, and the transfer material together, it is possible to lower the heating temperature required for each of them, thereby eliminating the need to excessively heat each of them. In addition to the fact that the amount of heat dissipated can be suppressed to a small value and the overall heat utilization rate can be significantly improved, the total energy consumption can be significantly reduced. Further, it becomes possible to transfer and fix toner images at high speed. In addition, since the intermediate transfer belt 5 is not heated excessively, even if the toner image carrier 1 has a basic property sensitive to heat, such as a photoconductive photoreceptor, its good properties can be maintained. The intermediate transfer belt 5 is not heated to a high temperature, and it is possible to prevent problems such as a part of the material components of the intermediate transfer belt 5 adhering to the toner image carrier 1, and the intermediate transfer belt 5 is not heated to a high temperature. Furthermore, since it is not exposed to severe temperature changes, its durability can be maintained for a long period of time, or the heat resistance conditions required for the material of the intermediate transfer belt 5 can be relaxed, and the material can be improved. The selection range is expanded and costs can be reduced. Further, the toner is not heated excessively, and image blurring or offset phenomena due to excessive fluidity of the toner do not occur. In addition, the transfer material is not excessively heated, thermal deformation and wrinkles of the transfer material do not occur, and of course, there is virtually no risk of fire.
さて第3図は本発明の一実施例を示すもので中間転写体
として、ベルト状のものを用いて第1図の構成に対応す
る。Now, FIG. 3 shows an embodiment of the present invention, which corresponds to the structure shown in FIG. 1 by using a belt-shaped intermediate transfer member.
転写用回転体7及び圧接回転体9の表面近傍にそれぞれ
熱電対やサーミスタ等の感熱素子を有す温度検出部14
.13を配設してあり、温度検出部14の出力信号は熱
源への電力供給を制御する制御部15へ入力され、それ
に基づいて転写用回転体7用の熱源のヒータ7Aを制御
し、一方温度検出部13の出力信号は制御部15に入力
され、そこで圧接回転体9用の熱源のヒータ9Aを制御
するように構成されており、特に注目すべき構成は、複
写等の記録動作中に限って、転写用回転体7の熱源用ヒ
ータ7Aと圧接回転体9の熱源用ヒータ9Aとが同時に
オンされないように制御部15が構成されていることで
ある。A temperature detection unit 14 having a heat-sensitive element such as a thermocouple or thermistor near the surface of the transfer rotary body 7 and the pressure contact rotary body 9, respectively.
.. The output signal of the temperature detection section 14 is input to the control section 15 which controls the power supply to the heat source, and based on it, the heater 7A of the heat source for the transfer rotary body 7 is controlled. The output signal of the temperature detection section 13 is input to the control section 15, which is configured to control the heater 9A as a heat source for the press-contact rotary body 9. The only limitation is that the control unit 15 is configured so that the heat source heater 7A of the transfer rotary body 7 and the heat source heater 9A of the pressure contact rotary body 9 are not turned on at the same time.
非複写中に、転写用回転体7の熱源用ヒータ7Aと圧接
回転体9の熱源用ヒータ9Aに電力を供給し、両回転体
を定着可能な温度に高める。その後は、転写定着性能を
決める両回転体7.9の表面近傍に感熱素子(例えば熱
電対、サーミスタ等の半導体温度センサ)それぞれ14
.13からなる温度検出部からの温度情報が制御部15
に入力され、更にこの制御部15からの制御信号が上記
各ヒータ7A、9Aのリレー、SSR等によって構成さ
れる各スイッチ回路部(駆動回路)16.17に夫々入
力され、温度調整がなされる。During non-copying, power is supplied to the heat source heater 7A of the transfer rotary body 7 and the heat source heater 9A of the pressure contact rotary body 9 to raise the temperature of both rotary bodies to a temperature at which fixing can be performed. Thereafter, 14 heat-sensitive elements (for example, semiconductor temperature sensors such as thermocouples and thermistors) are installed near the surfaces of both rotating bodies 7.9, which determine the transfer and fixing performance.
.. Temperature information from the temperature detection section consisting of 13 is sent to the control section 15.
Further, the control signal from the control section 15 is inputted to each switch circuit section (drive circuit) 16 and 17 constituted by relays, SSRs, etc. of each of the heaters 7A and 9A, and temperature adjustment is performed. .
制御部15は、例えばマイクロコンピュータにより各回
転体7.9の各設定温度がメモリされ、各回転体7.9
の実際の温度が設定温度から変動した場合に、これに応
じて別々にヒータ7A、9Aへの電力供給を変化させる
信号をスイッチ回路部16.17に与える。例えば転写
回転体7の温度が高すぎる場合には、ヒータ7Aの電力
供給をオフする信号が制御部15からスイッチ回路部1
6へ与えられ、また逆の場合にはヒータ7Aに電力を供
給する信号が与えられる。これと並行して圧接回転体9
の設定温度もメモリしている制御部15からは圧接回転
体9の温度情報に対応した制御信号がスイッチ回路部1
7に与えられ、これによってヒータ9Aの供給電力が制
御され、転写定着に適した温度が保たれる。The control unit 15 stores each set temperature of each rotary body 7.9 by a microcomputer, for example, and stores each set temperature of each rotary body 7.9.
When the actual temperature of the heater changes from the set temperature, a signal is given to the switch circuit section 16.17 to change the power supply to the heaters 7A and 9A separately in accordance with this change. For example, if the temperature of the transfer rotor 7 is too high, a signal is sent from the control section 15 to the switch circuit section 1 to turn off the power supply to the heater 7A.
6 and vice versa, a signal is provided to supply power to heater 7A. In parallel with this, the pressure welding rotating body 9
A control signal corresponding to the temperature information of the pressure welding rotating body 9 is sent from the control unit 15 which also stores the set temperature of the switch circuit unit 1.
7, thereby controlling the power supplied to the heater 9A to maintain a temperature suitable for transfer and fixing.
しかし複写等の記録をしている時には、両回転体を加熱
するヒータ7A、9Aが同時にオンしたのでは、複写プ
ロセスに要する露光ランプの点灯等の電力消費が重なる
ので、前記した理由によシ記録装置の電源容量を大きく
しなければならない。However, when copying or recording, if the heaters 7A and 9A that heat both rotating bodies are turned on at the same time, the power consumption for lighting the exposure lamps required for the copying process will overlap, so for the reason mentioned above, the The power capacity of the recording device must be increased.
電源容量の大きい電源は形状、重量も大きく、価格も高
く、実用には適さない。そこで本発明は複写動作中に各
ヒータ7A、9Aに電流が同時に流れるのを防ぐため特
に露光中での突入電流や容量不足による電圧降下を陀ぐ
ため、複写中に各回転体7又は9の温度が設定温度より
低くなっても、スイッチ16.17を同時にオンするの
ではなく、時間をずらせてオンするよう工夫しているの
である。A power supply with a large power supply capacity is large in shape, weight, and price, and is not suitable for practical use. Therefore, the present invention is designed to prevent currents from flowing simultaneously through each heater 7A and 9A during copying, especially to prevent voltage drop due to inrush current or insufficient capacity during exposure. Even if the temperature becomes lower than the set temperature, the switches 16 and 17 are not turned on at the same time, but are turned on at different times.
ヒータ7A及び9Aに電力供給はそれぞれスイッチ回路
部16.17によってON、01” Fが行なわれ、こ
のオン信号は、それぞれ感熱素子14、】3の各回転体
の表面温度情報に基づき制御部15から出されている。Power is supplied to the heaters 7A and 9A by the switch circuits 16 and 17, respectively, and the ON signal is sent to the control unit 15 based on the surface temperature information of the rotating bodies of the heat-sensitive elements 14 and 3, respectively. It is issued from.
感熱素子13.14の温度情報によシ、両回転体の温度
が設定温度よシ低くなシ、両ヒータ9A及び7Aを同時
にオンさせたいような状態が発生しても、制御部15で
スイッチ回路部17.16に出すオン信号のタイミング
をずらして一方の熱源のみをオンさせれば、所望の定着
温度を保持できる。例えば、制御部15にカウンタを設
けて一方のスイッチ回路部に接続し、スイッチ回路部1
7.16の両方に同時にオンの信号が出された場合でも
、カウンタに設定したある時間を経過しなけれはスイッ
チがオンされないようにすれば、スイッチ回路部16.
17が同時にオンされることはない。この設定時間は、
装置全体が冷えておシ大きな初期電流が流れる危険性の
ある時間に設定すれば、電源にかける負担を少なくする
ことができる。Even if the temperature information of the heat-sensitive elements 13 and 14 causes the temperature of both rotating bodies to be lower than the set temperature or a situation occurs in which it is desired to turn on both heaters 9A and 7A at the same time, the control unit 15 turns on the switch circuit. A desired fixing temperature can be maintained by shifting the timing of the ON signals sent to sections 17 and 16 and turning on only one of the heat sources. For example, a counter may be provided in the control section 15 and connected to one switch circuit section, and the counter may be connected to one switch circuit section.
7. Even if an ON signal is issued to both switch circuit sections 16.16 at the same time, the switch will not be turned on until a certain time set in the counter has elapsed.
17 are never turned on at the same time. This setting time is
By setting the time during which there is a risk that the entire device will cool down and a large initial current will flow, the burden on the power supply can be reduced.
第4図は、中間転写体をロール方式とした例を示すもの
であって、上記した例と共通部分には共通符号を付して
説明を省略している。FIG. 4 shows an example in which the intermediate transfer body is of a roll type, and parts common to the above-described example are given common symbols and explanations are omitted.
この例では、金属ロール基体上にシリコーンゴム等の粘
着層を転写層として設けた中間転写ロール6に対し、下
方から転写定着性を支配する所定温度の圧接ロール9が
圧接せしめられるが、両ロール5.9共に上述した如き
ヒータ25A(補助用)、9A(メインヒータ)が夫々
内蔵されている。In this example, a pressure roll 9 at a predetermined temperature that controls transfer fixing properties is brought into pressure contact with an intermediate transfer roll 6 having an adhesive layer such as silicone rubber as a transfer layer on a metal roll base from below. 5.9 Both have built-in heaters 25A (auxiliary) and 9A (main heater) as described above.
このような中間転写ロールを用いた方式は中間転写ベル
ト方式に比べて構成がずっと簡素化され、ロール温度も
制御し易いという利点がある。この場合も第3図と全く
同様に本発明を実施することができるので、動作は特に
説明しないが、同様な結果を得ている。A method using such an intermediate transfer roll has the advantage that the structure is much simpler than the intermediate transfer belt method, and the temperature of the roll can be easily controlled. In this case as well, the present invention can be carried out in exactly the same manner as in FIG. 3, so although the operation will not be particularly described, similar results are obtained.
また本発明では、複写動作中(複写開始から、最終複写
紙の排出まで)に亘って転写用回転体と圧接回転体のヒ
ータへの電力供給に関し、同時にONL、ないようにな
り、効果を得たが、特に複写動作中とシわけ露光ランプ
点灯中においては上記条件を満足した上に、ON、OF
F動作自体をしないようにすることが望ましい。In addition, in the present invention, there is no simultaneous ONL during the copying operation (from the start of copying to the ejection of the final copy sheet) with respect to the power supply to the heaters of the transfer rotary body and the pressure contact rotary body. However, in addition to satisfying the above conditions, especially during the copying operation and when the screening exposure lamp is on, the ON/OF
It is desirable to avoid performing the F operation itself.
図面は本発明の実施例を示すものであって、第1図は中
間転写ベルトを有する記録装置の概略図、
第2図は中間転写ベルトの一部断面図、第3図は中間転
写ベルトを用いた記録装置とヒータの温度制御ブロック
図、
第4図は中間転写粱〜ゼールを用いた記録装置とヒータ
の温度制御ブロック図
である。
なお、図面に用いられている符号において、1・・・・
・・・・・像保持体
3・・・・・・・・・現像機構
5・・・・・・・・・中間転写ベルト
6・・・・・・・・・押圧ロール
7・・・・・・・・・転写用回転体
7A、9A、25A・・・・・・ヒータ8・・・・・・
・・・テンションロール9・・・・・・・・・圧接ロー
ル
10・・・・・・・・・加熱板
13.14・・・・・・感熱素子(温度検出部)15・
・・・・・・・・制御部
16.17・・・・・・スイッチ回路部18・・・・・
・・・・電源
5・・・・・・・・・中間転写ロールThe drawings show embodiments of the present invention, in which FIG. 1 is a schematic diagram of a recording apparatus having an intermediate transfer belt, FIG. 2 is a partial sectional view of the intermediate transfer belt, and FIG. FIG. 4 is a block diagram of the temperature control of the recording apparatus and heater used. FIG. 4 is a block diagram of the temperature control of the recording apparatus and heater using intermediate transfer. In addition, in the symbols used in the drawings, 1...
......Image carrier 3...Development mechanism 5...Intermediate transfer belt 6...Press roll 7... ...Transfer rotor 7A, 9A, 25A...Heater 8...
...Tension roll 9...Press roll 10...Heating plate 13.14...Thermal element (temperature detection part) 15.
......Control section 16.17...Switch circuit section 18...
...Power supply 5...Intermediate transfer roll
Claims (1)
トナー像を転写せしめ、かっこの転写トナー像を次の転
写材へ更に転写する中間転写体とを有し、前記転写材へ
の転写部が転写用回転体とこれに圧接される圧接回転体
とによって構成されて6る記録装置において、前記転写
部を構成する前記転写用回転体及び前記圧接回転体との
双方に熱源及び両回転体の表面温度を検知する温度検知
部が夫々配されると共に、前記両回転体を夫々温度制御
するとき、記録動作中には双方の熱源が同時にオンしな
いように構成されたことを特徴とする記録装置。1. An image carrier that holds a toner image, and an intermediate transfer member that transfers the toner image on this image carrier and further transfers the transferred toner image in parentheses to the next transfer material, and In the recording apparatus, the transfer section is constituted by a transfer rotary body and a pressing rotary body that is in pressure contact with the transfer rotary body, in which a heat source and a Temperature detection units for detecting the surface temperatures of both rotating bodies are provided, and when controlling the temperature of both rotating bodies, both heat sources are configured not to be turned on at the same time during recording operation. recording device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20588582A JPS5995563A (en) | 1982-11-24 | 1982-11-24 | Recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20588582A JPS5995563A (en) | 1982-11-24 | 1982-11-24 | Recording device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5995563A true JPS5995563A (en) | 1984-06-01 |
Family
ID=16514336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20588582A Pending JPS5995563A (en) | 1982-11-24 | 1982-11-24 | Recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5995563A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0362080A (en) * | 1989-07-31 | 1991-03-18 | Canon Inc | Image forming device |
EP0871082A1 (en) * | 1997-04-07 | 1998-10-14 | Xeikon Nv | Electrostatographic printer and method |
-
1982
- 1982-11-24 JP JP20588582A patent/JPS5995563A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0362080A (en) * | 1989-07-31 | 1991-03-18 | Canon Inc | Image forming device |
EP0871082A1 (en) * | 1997-04-07 | 1998-10-14 | Xeikon Nv | Electrostatographic printer and method |
US6052551A (en) * | 1997-04-07 | 2000-04-18 | Xeikon N.V. | Electrostatographic printer and method |
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