JP2000098783A - Fixing device and image forming device - Google Patents
Fixing device and image forming deviceInfo
- Publication number
- JP2000098783A JP2000098783A JP10264583A JP26458398A JP2000098783A JP 2000098783 A JP2000098783 A JP 2000098783A JP 10264583 A JP10264583 A JP 10264583A JP 26458398 A JP26458398 A JP 26458398A JP 2000098783 A JP2000098783 A JP 2000098783A
- Authority
- JP
- Japan
- Prior art keywords
- release agent
- fixing
- roller
- rotating body
- leveling
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、互いに圧接する一
対の回転体のニップに未定着像を有する記録材を通過さ
せて未定着像の定着を行う加熱定着装置、及びこの加熱
定着装置を有する画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat fixing device for fixing an unfixed image by passing a recording material having an unfixed image through the nip of a pair of rotating members which are in pressure contact with each other, and the heat fixing device. The present invention relates to an image forming apparatus.
【０００２】[0002]
【従来の技術】上記のような画像形成装置の一例とし
て、図３〜図５に複数の光走査手段を有するフルカラー
複写機を示す。図３はフルカラー複写機の断面図、図４
は図３の像形成部の拡大図、図５は図３の定着部の拡大
図である。2. Description of the Related Art As an example of such an image forming apparatus, FIGS. 3 to 5 show a full-color copying machine having a plurality of optical scanning means. FIG. 3 is a sectional view of a full-color copying machine, and FIG.
3 is an enlarged view of the image forming unit in FIG. 3, and FIG. 5 is an enlarged view of the fixing unit in FIG.
【０００３】これらの図３〜図５に基づき、まずフルカ
ラー複写機について簡単に説明する。A full-color copying machine will first be briefly described with reference to FIGS.
【０００４】図３に示すように、潜像担持体たる電子写
真感光体（以下、「感光ドラム」とする）の周囲に、現
像装置等を有して構成される画像形成手段たる画像形成
ステイションが４個設けられ、該各画像形成ステイショ
ンにて形成された感光ドラム上の画像が、該感光ドラム
に隣接して移動通過する搬送手段上の紙等の記録材（以
下、「転写紙」とする）Ｐへ転写される構成となってい
る。As shown in FIG. 3, an image forming stay as an image forming means including a developing device and the like is provided around an electrophotographic photosensitive member (hereinafter referred to as a "photosensitive drum") as a latent image carrier. The image on the photosensitive drum formed at each of the image forming stations is provided with a recording material such as a sheet of paper (hereinafter referred to as “transfer paper”) on a conveying means that moves and passes adjacent to the photosensitive drum. ") Is transferred to P.
【０００５】画像形成ステイションの上方には、原稿を
ＣＣＤ等の光電変換素子で読み取るリーダ部が設けられ
ている。[0005] Above the image forming station, there is provided a reader section for reading an original by a photoelectric conversion element such as a CCD.
【０００６】図４に示すように、マゼンタ、シアン、イ
エロー、ブラックの各色の画像を形成する各画像形成ス
テイションＰａ，Ｐｂ，Ｐｃ，Ｐｄには、それぞれ感光
ドラム１ａ，１ｂ，１ｃ，１ｄが配置されており、各感
光ドラムは矢印方向に回転自在となっている。さらに、
各感光ドラム１ａ，１ｂ，１ｃ，１ｄの周囲には、帯電
器１２ａ，１２ｂ，１２ｃ，１２ｄ，レーザ走査部、現
像装置２ａ，２ｂ，２ｃ，２ｄ、そして、クリーナ４
ａ，４ｂ，４ｃ，４ｄが上記感光ドラムの回転方向に沿
って順次配設されており、各感光ドラムの下方には、転
写部３が配設されている。該転写部３は、各画像形成ス
テイションに共通の記録材搬送手段たる転写ベルト３１
及び転写用帯電器３ａ，３ｂ，３ｃ，３ｄを有してい
る。As shown in FIG. 4, photosensitive drums 1a, 1b, 1c and 1d are provided at image forming stations Pa, Pb, Pc and Pd for forming images of magenta, cyan, yellow and black, respectively. Each photosensitive drum is rotatable in the direction of the arrow. further,
Around each photosensitive drum 1a, 1b, 1c, 1d, chargers 12a, 12b, 12c, 12d, a laser scanning unit, developing devices 2a, 2b, 2c, 2d, and a cleaner 4
a, 4b, 4c, and 4d are sequentially arranged along the rotation direction of the photosensitive drum, and a transfer section 3 is arranged below each photosensitive drum. The transfer unit 3 includes a transfer belt 31 serving as a recording material conveying unit common to each image forming station.
And transfer chargers 3a, 3b, 3c, 3d.
【０００７】以上のような複写機において、図３、図４
に示す記録材供給手段たる給紙カセット６１から供給さ
れた転写紙Ｐは、転写ベルト３１上に支持されて各画像
形成ステイションへ搬送され、上記各感光ドラム上に形
成された各色のトナー像を順次転写される。この転写工
程が終了すると、上記紙Ｐは転写ベルト３１から分離さ
れて定着装置５へ記録材案内手段たる搬送ベルト６２に
より搬送される。In the above-described copying machine, FIGS.
The transfer paper P supplied from a paper feed cassette 61 as a recording material supply means shown in FIG. 1 is supported on a transfer belt 31 and conveyed to each image forming station, and a toner image of each color formed on each photosensitive drum is formed. Are sequentially transferred. When the transfer process is completed, the paper P is separated from the transfer belt 31 and is conveyed to the fixing device 5 by the conveyance belt 62 serving as a recording material guiding unit.
【０００８】定着装置５は、図５に詳細に示すように、
回転自在に配設された定着用回転体たる定着ローラ５１
と、定着ローラ５１に圧接しながら回転する加圧用回転
体たる加圧ローラ５２と、離型剤供給塗布手段たる離型
剤塗布装置５３と、ローラクリーニング装置５４，５５
を有した構成となっている。定着ローラ５１及び加圧ロ
ーラ５２の内部には、ハロゲンランプ等のヒータ５６，
５７がそれぞれ配設されている。また、定着ローラ５１
及び加圧ローラ５２にはそれぞれサーミスタ５８，５９
が接触するように配設されており、温度調節回路を介し
てヒータ５６、ヒータ５７への電圧を制御することによ
り定着ローラ５１及び加圧ローラ５２の表面の温度調節
を行っている。[0008] As shown in detail in FIG.
A fixing roller 51 rotatably disposed as a fixing rotating body.
A pressing roller 52 serving as a pressing rotary member that rotates while being pressed against the fixing roller 51; a releasing agent applying device 53 serving as a releasing agent supplying / applying means; and roller cleaning devices 54 and 55
Is provided. Inside the fixing roller 51 and the pressure roller 52, a heater 56 such as a halogen lamp,
57 are provided respectively. Further, the fixing roller 51
And the pressure roller 52 have thermistors 58 and 59, respectively.
The temperature of the surface of the fixing roller 51 and the pressure roller 52 is controlled by controlling the voltage to the heater 56 and the heater 57 via a temperature control circuit.
【０００９】また、定着ローラ５１にはクリーニング装
置５４及び離型剤塗布装置５３が取り付けられ、このク
リーニング装置５４により定着ローラ５１上にセットし
たトナー等のクリーニングがなされていると共に、離型
剤塗布装置５３により、離型剤であるシリコーンオイル
等が定着ローラ５１に塗布され、該定着ローラ５１から
の転写紙Ｐの分離の容易化及びトナーのオフセットの防
止が図られている。A cleaning device 54 and a release agent applying device 53 are attached to the fixing roller 51. The cleaning device 54 cleans toner and the like set on the fixing roller 51 and also applies a release agent. The device 53 applies silicone oil or the like as a release agent to the fixing roller 51 to facilitate separation of the transfer paper P from the fixing roller 51 and to prevent toner offset.
【００１０】クリーニング装置５４は帯状の耐熱不織布
からなるクリーニングウェブ５４ａと、該クリーニング
ウェブ５４ａを定着ローラ５１に押圧する押圧ローラ５
４ｂと、新しいクリーニングウェブ５４ａを巻出す巻出
しローラ５４ｃと、トナー等が付着しクリーニング能力
の低下したクリーニングウェブ５４ａを徐々に巻取って
いく巻取りローラ５４ｄ等とから構成されるもので、特
にサーミスタ５８にオフセットトナーが付着してこのサ
ーミスタ５８に検知不良を生じさせないよう、このクリ
ーニング装置５４はサーミスタ５８に対して定着ローラ
５１の回転方向上流側に設けられている。The cleaning device 54 includes a cleaning web 54 a made of a heat-resistant nonwoven fabric in a belt shape, and a pressing roller 5 for pressing the cleaning web 54 a against the fixing roller 51.
4b, an unwinding roller 54c that unwinds a new cleaning web 54a, and a winding roller 54d that gradually winds the cleaning web 54a having a reduced cleaning ability due to the adhesion of toner and the like. The cleaning device 54 is provided upstream of the thermistor 58 in the rotation direction of the fixing roller 51 so as to prevent the offset toner from adhering to the thermistor 58 and causing a detection failure in the thermistor 58.
【００１１】クリーニングウェブ５４ａの巻取り方法と
しては、カウンターから所定枚数コピーしたと判断した
ときに、不図示のソレノイドがＯＮしワンウェイクラッ
チが動作することにより、ローラ回転と逆方向に所定量
巻取っている。逆方向に巻取ることによりクリーニング
ウェブ５４ａはローラ回転方向に巻込まれないようにな
っている。As a method for winding the cleaning web 54a, when it is determined that a predetermined number of copies have been made from the counter, a solenoid (not shown) is turned on and the one-way clutch is operated, thereby winding a predetermined amount in the direction opposite to the rotation of the roller. ing. By winding in the opposite direction, the cleaning web 54a is prevented from being wound in the roller rotation direction.
【００１２】離型剤塗布装置５３はシリコーンオイル等
の離型剤を有するオイルタンク５３ａと、該オイルタン
ク５３ａから離型剤であるオイルを汲み上げ、定着ロー
ラ５１の表面近傍まで導き、離型剤を定着ローラ５１表
面に滴下するように表面に穴のあいた中空パイプ５３ｂ
と、中空パイプ５３ｂから滴下された離型剤を定着ロー
ラ５１上に均一にならす耐熱フェルト５３ｃと、離型剤
量を定着ローラ５１上で一定量に規制するためにフッ素
ゴム等の弾性体からなる規制ブレード５３ｄ等から構成
されているもので、特に定着ローラ５１への均一なオイ
ルの塗布を図るべく、この離型剤塗布装置５３はサーミ
スタ５８に対して定着ローラ５１の回転方向下流側に配
設されている。The release agent application device 53 pumps an oil tank 53a having a release agent such as silicone oil and oil which is a release agent from the oil tank 53a and guides the oil to the vicinity of the surface of the fixing roller 51. A hollow pipe 53b having a hole in its surface so that
And a heat-resistant felt 53c that evenly distributes the release agent dropped from the hollow pipe 53b onto the fixing roller 51, and an elastic body such as fluororubber in order to regulate the amount of the release agent to a constant amount on the fixing roller 51. In order to uniformly apply oil to the fixing roller 51, the release agent applying device 53 is located downstream of the thermistor 58 in the rotation direction of the fixing roller 51. It is arranged.
【００１３】また、加圧ローラ５２にも、定着ローラ１
のクリーニング装置５４と同様なクリーニングウェブ５
５ａ、押圧ローラ５５ｂ、巻出しローラ５５ｃ、巻取り
ローラ５５ｄ等とからなるクリーニング装置５５が取り
付けられ、定着ローラ５１を介して加圧ローラ５２に付
着したトナーのクリーニングがなされている。The pressing roller 52 is also provided with the fixing roller 1.
Cleaning web 5 similar to the cleaning device 54 of FIG.
A cleaning device 55 including a roller 5a, a pressing roller 55b, an unwinding roller 55c, a winding roller 55d, and the like is attached, and the toner adhered to the pressure roller 52 via the fixing roller 51 is cleaned.
【００１４】また、加圧ローラ５２には、加圧ローラ５
２上に残った余剰離型剤を除去する離型剤除去用弾性体
たるオイル除去ブレード６０が当接している。このオイ
ル除去ブレード６０がない場合は、余剰離型剤が定着ロ
ーラ５１と加圧ローラ５２とのニップに溜り、記録剤上
にシミとなったり、ＯＨＰ用の透明ラミメートフィルム
がスリップしてニップへの進入不良が発生する。オイル
除去ブレード６０の材質としては、Ｓｉゴム、フッ素ゴ
ム等が用いられ、これらのブレードが加圧ローラ５２の
回転方向に対して順方向または逆方向へ適当な進入量を
もって当接している。The pressing roller 52 includes a pressing roller 5.
An oil removing blade 60, which is an elastic body for removing a release agent that removes excess release agent remaining on the surface 2, is in contact with the release agent. If the oil removal blade 60 is not provided, excess release agent accumulates in the nip between the fixing roller 51 and the pressure roller 52, causing stains on the recording material, or slipping of the transparent laminating film for OHP to cause nip. Entry failure occurs. As the material of the oil removing blade 60, Si rubber, fluoro rubber, or the like is used, and these blades are in contact with the rotating direction of the pressure roller 52 in a forward direction or a reverse direction with an appropriate amount of approach.
【００１５】この状態において、転写紙Ｐが搬送されて
くると、定着ローラ５１と加圧ローラ５２は回転し、定
着ローラ５１の表面に離型剤としてシリコーンオイルが
塗布され、転写紙Ｐが定着ローラ５１と加圧ローラ５２
の間を通過する際に表裏両面からほぼ一定の圧力、温度
で加圧、加熱され紙表面上の未定着トナー像は溶融して
定着され、転写紙Ｐ上にフルカラー画像が形成される。
この画像が定着された転写紙Ｐは下分離爪６８によって
加圧ローラ５２から分離され、機外へ排出される。In this state, when the transfer paper P is conveyed, the fixing roller 51 and the pressure roller 52 rotate, and silicone oil is applied to the surface of the fixing roller 51 as a release agent to fix the transfer paper P. Roller 51 and pressure roller 52
When the paper passes between the front and back sides, the unfixed toner image on the paper surface is melted and fixed by applying a substantially constant pressure and temperature from both front and back sides, and a full-color image is formed on the transfer paper P.
The transfer paper P on which the image is fixed is separated from the pressure roller 52 by the lower separation claw 68, and is discharged out of the apparatus.
【００１６】[0016]
【発明が解決しようとする課題】ところで離型剤塗布装
置５３において、中空パイプ５３ｂより定着ローラ５１
上に滴下された離型剤は定着ローラ５１上に滴として跡
が残ってしまうため、従来は離型剤規制ブレード５３ｄ
の上流側に離型剤ならしのために耐熱フェルト等からな
る離型剤ならし部材５３ｃを配置し、均一化した後、離
型剤規制ブレード５３ｄで一定量に規制を行っていた。
しかしこのような構成においては離型剤ならし部材５３
ｃの耐熱フェルトから繊維が脱落し、その下流にあるオ
イル規制ブレード５３ｄに繊維が付着することにより、
充分な規制が行われず、オイルスジ等の不具合が発生し
ていた。また離型剤ならし部材５３ｃは耐熱フェルトを
一定圧力で当接しているため、定着ローラ５１に付着し
たオフセットトナーが離型剤ならし部材５３ｃに付着し
て、定着ローラ５１を傷付け、画像不良を引き起こすと
いう問題も発生していた。In the release agent applying device 53, the fixing roller 51 is moved from the hollow pipe 53b.
The release agent dropped on the fixing roller 51 remains as a droplet on the fixing roller 51. Therefore, conventionally, the release agent regulating blade 53d
A release agent leveling member 53c made of a heat-resistant felt or the like is arranged upstream of the mold release agent, and after uniformity, the release agent restriction blade 53d regulates the release agent at a constant amount.
However, in such a configuration, the release agent leveling member 53
The fibers fall off from the heat-resistant felt c, and the fibers adhere to the oil regulating blade 53d located downstream thereof.
Sufficient regulation was not performed, and problems such as oil streaks occurred. Further, since the release agent leveling member 53c is in contact with the heat-resistant felt at a constant pressure, the offset toner adhered to the fixing roller 51 adheres to the release agent leveling member 53c and damages the fixing roller 51, resulting in an image defect. There was also a problem that caused.
【００１７】本発明は前記の問題点を解決した新規な定
着装置及び画像形成装置を提供することを目的とする。An object of the present invention is to provide a novel fixing device and an image forming apparatus which solve the above problems.
【００１８】[0018]
【課題を解決するための手段】前記の目的は以下の手段
によって達成される。すなわち、本発明は、少なくと
も、互いに圧接しながら回転自在に配設された一対の定
着用回転体と、該回転体の表面に離型剤を供給する手段
と、該回転体表面上の離型剤を均一にする手段と、該回
転体上の離型剤量を所定の値に制御する手段を該定着用
回転体の回転方向に順次配列して有し、該回転体が形成
する圧接部で未定着画像を有する記録材を挟圧搬送して
該記録材上の未定着画像の加熱定着を行う定着装置にお
いて、上記離型剤均一化手段が下層の弾性体層と少なく
ともポリテトラフルオロエチレン多孔質膜からなる表面
層とからなることを特徴とする定着装置を提案するもの
であり、離型剤均一化手段が弾性体の下層と少なくとも
ポリテトラフルオロエチレン多孔質膜からなる表面層と
からなる回転体であること、前記離型剤供給手段の少な
くとも下層弾性体が離型剤を含有すること、前記離型剤
供給手段と前記離型剤均一化手段が同一部材であるこ
と、前記離型剤均一化手段の回転速度が前記定着用回転
体の回転速度より遅く、かつ該記録材均一化手段の該定
着用回転体への当接位置が定着用回転体の鉛直上方から
定着用回転体の回転方向に向かって９０°以内であるこ
とを含む。The above object is achieved by the following means. That is, the present invention provides at least a pair of fixing rotators rotatably arranged while being pressed against each other, a unit for supplying a release agent to the surface of the rotator, and a mold release on the rotator surface. Means for making the agent uniform and means for controlling the amount of the release agent on the rotating body to a predetermined value, which are sequentially arranged in the rotation direction of the fixing rotating body, and a press contact portion formed by the rotating body. In a fixing device in which a recording material having an unfixed image is nipped and conveyed to heat and fix an unfixed image on the recording material, the release agent uniforming means includes a lower elastic layer and at least polytetrafluoroethylene. A fixing device characterized by comprising a surface layer made of a porous film, wherein the releasing agent homogenizing means comprises a lower layer of an elastic body and at least a surface layer made of a polytetrafluoroethylene porous film. The release agent, At least the lower elastic body of the unit contains a release agent, the release agent supply unit and the release agent uniformizing unit are the same member, and the rotational speed of the release agent uniformization unit is the fixing member. The rotation speed of the rotating body is lower than that of the rotating body, and the contact position of the recording material equalizing means with the fixing rotating body is within 90 ° from vertically above the fixing rotating body in the rotation direction of the fixing rotating body. Including.
【００１９】また、本発明は前記の定着装置を具備させ
たことを特徴とする画像形成装置を提案するものであ
る。Further, the present invention proposes an image forming apparatus provided with the above fixing device.
【００２０】[0020]
【発明の実施の形態】以下、本発明を図面を参照してさ
らに詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.
【００２１】図１は本発明の定着装置の一例を示す概略
断面図である。FIG. 1 is a schematic sectional view showing an example of the fixing device of the present invention.
【００２２】本発明の定着装置は図１に示すように回転
自在に配設された定着用回転体である定着ローラ５１と
該定着ローラ５１に圧接しながら回転する加圧用回転体
である加圧ローラ５２と、離型剤供給塗布手段である離
型剤塗布装置５３とを有し、該離型剤塗布装置５３の斜
め上方の定着ローラ５１上に離型剤ならしローラ１００
が圧接するように設けてある。As shown in FIG. 1, the fixing device of the present invention has a fixing roller 51 which is a rotatable fixing member and a pressing member which rotates while pressing against the fixing roller 51. A roller 52 and a release agent applying device 53 serving as a release agent supply / applying means. The release agent leveling roller 100 is disposed on the fixing roller 51 obliquely above the release agent application device 53.
Are provided so as to be pressed against each other.
【００２３】離型剤均一化手段である離型剤ならしロー
ラ１００は下層となる弾性体層１０１とその表面にポリ
テトラフルオロエチレン多孔質膜からなる表面層１０２
を有し定着ローラ５１上に回転自在に設けられている。The release agent leveling roller 100 serving as a release agent uniforming means includes a lower elastic layer 101 and a surface layer 102 of a polytetrafluoroethylene porous film on its surface.
And is rotatably provided on the fixing roller 51.
【００２４】弾性体層１０１としてはシリコーンゴム発
泡体、耐熱フェルト、ＬＴＶシリコーンゴム、ＨＴＶシ
リコーンゴム等が挙げられる。As the elastic layer 101, silicone rubber foam, heat-resistant felt, LTV silicone rubber, HTV silicone rubber and the like can be used.
【００２５】離型剤ならしローラ１００の下層弾性体１
０１には離型剤を含浸させて下層弾性体１０１中に含有
させるようにして離型剤供給手段と離型剤均一化手段と
を兼ねるようにしてもよい。Lower elastic body 1 of release agent leveling roller 100
The release agent 01 may be impregnated with a release agent and contained in the lower elastic body 101 so as to serve as both a release agent supply unit and a release agent uniforming unit.
【００２６】また、離型剤均一化手段の回転速度は定着
用回転体の回転速度より遅くなるようにし、かつ、記録
材均一化手段の定着用回転体の回転方向に向かって９０
°以内にすることが好ましい。The rotation speed of the releasing agent uniformizing means is set to be lower than the rotation speed of the fixing rotator, and the rotational speed of the fixing material rotator of the recording material uniforming means is set at 90.degree.
It is preferable to set it within °.
【００２７】[0027]
【実施例】以下、本発明を実施例によりさらに具体的に
説明する。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples.
【００２８】（実施例１）図１に本発明の１実施例を表
す定着装置の概略断面図を示す。(Embodiment 1) FIG. 1 is a schematic sectional view of a fixing device according to an embodiment of the present invention.
【００２９】図１は、従来の耐熱フェルトからなり離型
剤ならし部材を改良したもので、１００は離型剤ならし
ローラである。離型剤ならしローラ１００はシリコーン
ゴム発泡体や耐熱フェルト等からなる弾性体層１０１と
その表面に多孔質ポリテトラフルオロエチレン膜１０２
を有している。FIG. 1 shows an improved release agent leveling member made of a conventional heat-resistant felt. Reference numeral 100 denotes a release agent leveling roller. The release agent leveling roller 100 includes an elastic layer 101 made of a silicone rubber foam, heat-resistant felt, or the like, and a porous polytetrafluoroethylene film 102 on the surface thereof.
have.
【００３０】実施例１においては、この離型剤ならしロ
ーラ１００を中空パイプ５３ｂと離型剤規制ブレード５
３ｄとの間に配置した。この離型剤ならしローラ１００
の下層がシリコーンゴム発泡体または耐熱フェルト等の
弾性体からなるので、所定圧力で定着ローラ５１に押し
当てることで所定幅のニップが形成できる。これによっ
て中空パイプ５３ｂから定着ローラ５１上に滴下された
離型剤はこのニップ通過時に均一にならされるため、離
型剤の滴下跡は発生しない。In the first embodiment, the release agent leveling roller 100 is connected to the hollow pipe 53 b and the release agent regulating blade 5.
3d. This release agent leveling roller 100
Since the lower layer is made of an elastic material such as a silicone rubber foam or a heat-resistant felt, a nip having a predetermined width can be formed by pressing the fixing roller 51 with a predetermined pressure. As a result, the release agent dropped onto the fixing roller 51 from the hollow pipe 53b is made uniform when passing through the nip, so that no trace of the release agent drops is generated.
【００３１】また、表層に多孔質ポリテトラフルオロエ
チレン膜１０２を有しているため、従来まで発生してい
た離型剤ならし部材からの繊維の脱落によるオイルスジ
は発生しなくなった。Further, since the porous polytetrafluoroethylene film 102 is provided on the surface layer, oil streaks caused by the detachment of the fibers from the release agent leveling member, which has been generated in the past, no longer occur.
【００３２】また、従来までは離型剤ならし部材の同一
箇所を、定着ローラ５１に当接していたため離型剤なら
し部材の汚れによる定着ローラ５１のキズが発生してい
たが、本実施例においては離型剤ならしローラとしたた
め、汚れが離型剤ならしローラ１００の表面に分散する
ため、定着ローラ５１へのダメージが少なくなった。ま
た表層に多孔質テトラフルオロエチレン膜１０２を用い
ているため汚れ量自体も従来の耐熱フェルトを用いた離
型剤ならし部材より少なくなった。In the prior art, since the same part of the release agent leveling member was in contact with the fixing roller 51, the fixing roller 51 was flawed due to contamination of the release agent leveling member. In the example, since the release agent leveling roller was used, dirt was dispersed on the surface of the release agent leveling roller 100, so that damage to the fixing roller 51 was reduced. Further, since the porous tetrafluoroethylene film 102 is used for the surface layer, the amount of dirt itself is smaller than that of the conventional release agent using a heat-resistant felt.
【００３３】なお、本実施例においては離型剤ならしロ
ーラを用いたが、必ずしもローラに限るものではなく定
着ローラに接する面が多孔質ポリテトラフルオロエチレ
ンで、基材が弾性体である押し当て部材であってもよ
い。In this embodiment, the release agent leveling roller is used. However, the present invention is not limited to the roller, and the surface in contact with the fixing roller is made of porous polytetrafluoroethylene and the base material is made of an elastic material. It may be a contact member.
【００３４】（実施例２）本実施例は図１に示す実施例
１の離型剤ならしローラ１００の下層弾性体層のシリコ
ーンゴム発泡体や耐熱フェルト等にシリコーンオイル等
の離型剤を含浸したものである。(Embodiment 2) In this embodiment, a release agent such as silicone oil is added to the silicone rubber foam or heat-resistant felt of the lower elastic layer of the release agent leveling roller 100 of Embodiment 1 shown in FIG. It is impregnated.
【００３５】このようにすることで、下層弾性体に含ま
れる離型剤は表層の多孔質膜から外部にしみ出すため離
型剤ならしローラ１００の表面にトナーの付着が減少
し、定着ローラ５１、及び離型剤ならしローラ１００の
寿命が向上する。By doing so, the release agent contained in the lower elastic body seeps out of the surface porous film, so that the adhesion of the toner to the surface of the release agent leveling roller 100 decreases, and the fixing roller 51, and the life of the release agent leveling roller 100 is improved.
【００３６】またさらには、下層弾性体層の離型剤含浸
量と表層の多孔質膜の穴の大きさ等を調節することによ
り、離型剤ならしローラ１００のみで離型剤供給を行う
ことができ、中空パイプ５３と汲み上げポンプを取り除
くことも可能である。Further, the release agent is supplied only by the release agent leveling roller 100 by adjusting the amount of the release agent impregnated in the lower elastic layer and the size of the holes in the surface porous film. It is also possible to remove the hollow pipe 53 and the pump.
【００３７】（実施例３）本実施例は実施例２において
は、離型剤ならしローラ１００内部に離型剤を含浸し、
離型剤供給も離型剤ならしローラ１００で行う場合に、
離型剤ならしローラ１００の周速を、定着ローラ５１の
周速より遅くしたものである。(Embodiment 3) This embodiment is different from Embodiment 2 in that the inside of the release agent leveling roller 100 is impregnated with the release agent.
When the release agent supply is also performed by the release agent leveling roller 100,
The peripheral speed of the release agent leveling roller 100 is lower than the peripheral speed of the fixing roller 51.
【００３８】このようにすることで図２に示すように離
型剤ならしローラ１００の回転方向の上流側に離型剤だ
まりができる。この離型剤だまりを作ることにより、離
型剤ならしローラ１００をすりぬける離型剤はより均一
化になる。By doing so, a release agent pool is formed on the upstream side in the rotation direction of the release agent leveling roller 100 as shown in FIG. By forming the release agent pool, the release agent that passes through the release agent leveling roller 100 becomes more uniform.
【００３９】またこの離型剤だまりをつくるために離型
剤ならしローラ１００の定着ローラ５１への当接位置は
定着ローラ５１の鉛直上方から定着ローラ５１の回転方
向へ向かって９０°以内となる。In order to form the accumulation of the release agent, the contact position of the release agent leveling roller 100 with respect to the fixing roller 51 should be within 90 ° from vertically above the fixing roller 51 toward the rotation direction of the fixing roller 51. Become.
【００４０】[0040]
【発明の効果】以上説明したように本発明に係る第１の
発明によれば、少なくとも、互いに圧接しながら回転自
在に配設された一対の定着用回転体と、該回転体の表面
に離型剤を供給する手段と、該回転体表面上の離型剤を
均一にする手段と、該回転体上の離型剤量を所定の値に
制御する手段を該定着用回転体の回転方向に順次配列し
て有し、該回転体が形成する圧接部で未定着画像を有す
る記録材を挟圧搬送して該記録材上の未定着画像の加熱
定着を行う定着装置において、上記離型剤均一化手段が
弾性体の下層と少なくともポリテトラフルオロエチレン
多孔質膜からなる表面層とからなることにより、定着用
回転体の寿命の向上が可能となった。As described above, according to the first aspect of the present invention, at least a pair of fixing rotators disposed rotatably while being pressed against each other, and separated from the surface of the rotator. Means for supplying a mold agent, means for uniformizing the release agent on the surface of the rotator, and means for controlling the amount of the release agent on the rotator to a predetermined value. A fixing device for arranging the recording material having an unfixed image at a pressure contact portion formed by the rotating body to nip and heat and fix the unfixed image on the recording material. Since the agent uniforming means includes the lower layer of the elastic body and at least the surface layer made of the polytetrafluoroethylene porous film, the life of the fixing rotating body can be improved.
【００４１】本発明に係る第２の発明によれば、少なく
とも、互いに圧接しながら回転自在に配設された一対の
定着用回転体と、該回転体の表面に離型剤を供給する手
段と、該回転体表面上の離型剤を均一にする手段と、該
回転体上の離型剤量を所定の値に制御する手段を該定着
用回転体の回転方向に順次配列して有し、該回転体が形
成する圧接部で未定着画像を有する記録材を挟圧搬送し
て該記録材上の未定着画像の加熱定着を行う定着装置に
おいて、上記離型剤均一化手段が弾性体の下層と少なく
ともポリテトラフルオロエチレン多孔質膜からなる表面
層とからなる回転体であることにより、定着用回転体の
寿命、及び離型剤均一化手段の寿命の向上が可能となっ
た。According to the second aspect of the present invention, at least a pair of fixing rotators disposed rotatably while being pressed against each other, and means for supplying a release agent to the surface of the rotator. Means for uniformizing the release agent on the surface of the rotating body and means for controlling the amount of the releasing agent on the rotating body to a predetermined value, which are sequentially arranged in the rotation direction of the fixing rotating body. In a fixing device in which a recording material having an unfixed image is nipped and conveyed at a pressure contact portion formed by the rotator to heat and fix an unfixed image on the recording material, the releasing agent uniformizing means may be an elastic material. , The life of the fixing rotator and the life of the releasing agent uniformizing means can be improved.
【００４２】本発明に係る第３の発明によれば、少なく
とも、互いに圧接しながら回転自在に配設された一対の
定着用回転体と、該回転体の表面に離型剤を供給する手
段と、該回転体表面上の離型剤を均一にする手段と、該
回転体上の離型剤量を所定の値に制御する手段を該定着
用回転体の回転方向に順次配列して有し、該回転体が形
成する圧接部で未定着画像を有する記録材を挟圧搬送し
て該記録材上の未定着画像の加熱定着を行う定着装置に
おいて、上記離型剤均一化手段が少なくとも離型剤を含
有する弾性体の下層と少なくともポリテトラフルオロエ
チレン多孔質膜からなる表面層とからなることにより、
定着用回転体の寿命、及び離型剤均一化手段の寿命の向
上が可能となった。According to the third aspect of the present invention, at least a pair of fixing rotators disposed rotatably while being pressed against each other, and means for supplying a release agent to the surface of the rotator. Means for uniformizing the release agent on the surface of the rotating body and means for controlling the amount of the releasing agent on the rotating body to a predetermined value, which are sequentially arranged in the rotation direction of the fixing rotating body. In a fixing device that presses and conveys a recording material having an unfixed image at a pressure contact portion formed by the rotating body and heat-fixes an unfixed image on the recording material, the release agent uniformizing unit includes at least a releasing agent. By comprising a lower layer of the elastic body containing the mold agent and a surface layer made of at least a polytetrafluoroethylene porous membrane,
The service life of the fixing rotating body and the service life of the releasing agent uniformizing means can be improved.
【００４３】本発明に係る第４の発明によれば、少なく
とも、互いに圧接しながら回転自在に配設された一対の
定着用回転体と、該回転体の表面に離型剤を供給し且つ
均一化する手段と、該回転体上の離型剤量を所定の値に
制御する手段を該定着用回転体の回転方向に順次配列し
て有し、該回転体が形成する圧接部で未定着画像を有す
る記録材を挟圧搬送して該記録材上の未定着画像の加熱
定着を行う定着装置において、上記離型剤均一化手段が
少なくとも離型剤を含有する弾性体の下層と少なくとも
ポリテトラフルオロエチレン多孔質膜からなる表面層と
からなることにより、定着用回転体の寿命、及び離型剤
均一化手段の寿命の向上、コストダウン、省スペース化
がが可能となった。According to the fourth aspect of the present invention, at least a pair of fixing rotators rotatably disposed while being in pressure contact with each other, and a releasing agent supplied to the surface of the rotator for uniform supply. And a means for controlling the amount of the release agent on the rotating body to a predetermined value are sequentially arranged in the rotating direction of the fixing rotating body, and the unfixed portion is formed by the pressing portion formed by the rotating body. In a fixing device in which a recording material having an image is nipped and conveyed to heat and fix an unfixed image on the recording material, the release agent uniformizing means may include at least a lower layer of an elastic body containing a release agent and at least a poly. By having the surface layer made of a tetrafluoroethylene porous film, the life of the fixing rotating body and the life of the releasing agent uniformizing means can be improved, the cost can be reduced, and the space can be saved.
【００４４】本発明に係る第５の発明によれば、少なく
とも、互いに圧接しながら回転自在に配設された一対の
定着用回転体と、該回転体の表面に離型剤を供給し、且
つ均一化する手段と、該回転体上の離型剤量を所定の値
に制御する手段を該定着用回転体の回転方向に順次配列
して有し、該回転体が形成する圧接部で未定着画像を有
する記録材を挟圧搬送して該記録材上の未定着画像の加
熱定着を行う定着装置において、上記離型剤均一化手段
が少なくとも離型剤を含有する弾性体の下層と少なくと
もポリテトラフルオロエチレン多孔質膜からなる表面層
とからなる回転体で、かつ上記離型剤均一化手段の回転
速度が上記定着用回転体の回転速度より遅く、かつ該記
録材均一化手段の該定着用回転体への当接位置が定着用
回転体の鉛直上方から定着用回転体の回転方向に向かっ
て９０°以内であることにより定着用回転体の寿命、及
び離型剤均一化手段の寿命の向上が可能となった。According to the fifth aspect of the present invention, at least a pair of fixing rotators disposed rotatably while being pressed against each other, and a releasing agent is supplied to the surface of the rotator, and Means for equalizing and means for controlling the amount of the release agent on the rotating body to a predetermined value are sequentially arranged in the rotation direction of the fixing rotating body, and the pressure contact portion formed by the rotating body has not been determined yet. In a fixing device in which a recording material having a formed image is nipped and conveyed to heat and fix an unfixed image on the recording material, the release agent uniformizing means may include at least a lower layer of an elastic body containing at least a release agent. A rotating body comprising a surface layer made of a polytetrafluoroethylene porous film, wherein the rotation speed of the releasing agent uniforming means is lower than the rotating speed of the fixing rotating body, and The contact position with the fixing rotating body is vertically above the fixing rotating body. Life of the fixing rotary member, and to improve the lifetime of the release agent uniformizing means made possible by is within 90 ° against the direction of rotation of the al fixing rotation member.
【図１】本発明の定着装置の一例を示す概略断面図であ
る。FIG. 1 is a schematic sectional view showing an example of a fixing device of the present invention.
【図２】本発明の実施例３における定着装置の概略断面
図である。FIG. 2 is a schematic sectional view of a fixing device according to a third embodiment of the present invention.
【図３】本発明を適用した画像形成装置の断面図であ
る。FIG. 3 is a sectional view of an image forming apparatus to which the present invention is applied.
【図４】図３の像形成部の拡大断面図である。FIG. 4 is an enlarged sectional view of the image forming unit of FIG. 3;
【図５】図３の定着部拡大断面図である。FIG. 5 is an enlarged sectional view of a fixing unit in FIG. 3;
５１ 定着ローラ ５２ 加圧ローラ ５３ 離型剤塗布装置 ５３ａ オイルタンク ５３ｂ 中空パイプ ５３ｃ 離型剤ならし部材 ５３ｄ 規制ブレード １００ 離型剤ならしローラ（離型剤均一化手段） １０１ 弾性体層 １０２ 表面層 Ｐ 記録材 Reference Signs List 51 fixing roller 52 pressure roller 53 release agent application device 53a oil tank 53b hollow pipe 53c release agent leveling member 53d regulating blade 100 release agent leveling roller (release agent uniforming means) 101 elastic layer 102 surface Layer P Recording material
Claims (6)
在に配設された一対の定着用回転体と、該回転体の表面
に離型剤を供給する手段と、該回転体表面上の離型剤を
均一にする手段と、該回転体上の離型剤量を所定の値に
制御する手段を該定着用回転体の回転方向に順次配列し
て有し、該回転体が形成する圧接部で未定着画像を有す
る記録材を挟圧搬送して該記録材上の未定着画像の加熱
定着を行う定着装置において、上記離型剤均一化手段が
下層の弾性体層と少なくともポリテトラフロオロエチレ
ン多孔質膜からなる表面層とからなることを特徴とする
定着装置。At least a pair of fixing rotators disposed rotatably while being pressed against each other, means for supplying a release agent to the surface of the rotator, and a release agent on the surface of the rotator And a means for controlling the amount of the release agent on the rotating body to a predetermined value are sequentially arranged in the rotation direction of the fixing rotating body, and a pressing portion formed by the rotating body has In a fixing device in which a recording material having an unfixed image is nipped and conveyed to heat and fix the unfixed image on the recording material, the release agent uniforming means includes a lower elastic layer and at least polytetrafluoroethylene. And a surface layer comprising a porous film.
求項１に記載の定着装置。2. The fixing device according to claim 1, wherein said releasing agent uniforming means is a rotating body.
性体が離型剤を含有する請求項１乃至請求項２のうち、
いずれか１項に記載の定着装置。3. The method according to claim 1, wherein at least the lower elastic body of the release agent supply means contains a release agent.
The fixing device according to claim 1.
手段が同一部材である請求項１乃至請求項３のうち、い
ずれか１項に記載の定着装置。4. The fixing device according to claim 1, wherein the releasing agent supply unit and the releasing agent uniformizing unit are the same member.
定着用回転体の回転速度より遅く、かつ該記録材均一化
手段の該定着用回転体への当接位置が定着用回転体の鉛
直上方から定着用回転体の回転方向に向かって９０°以
内である請求項１乃至請求項４のうち、いずれか１項に
記載の定着装置。5. The fixing rotating body according to claim 1, wherein a rotation speed of said releasing agent uniformizing means is lower than a rotating speed of said fixing rotating body, and a contact position of said recording material uniformizing means with said fixing rotating body is fixed. The fixing device according to any one of claims 1 to 4, wherein the angle is within 90 degrees from a vertically upper part in a rotation direction of the fixing rotating body.
記載の定着装置を具備させたことを特徴とする画像形成
装置。6. An image forming apparatus comprising the fixing device according to claim 1. Description:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10264583A JP2000098783A (en) | 1998-09-18 | 1998-09-18 | Fixing device and image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10264583A JP2000098783A (en) | 1998-09-18 | 1998-09-18 | Fixing device and image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000098783A true JP2000098783A (en) | 2000-04-07 |
Family
ID=17405319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10264583A Pending JP2000098783A (en) | 1998-09-18 | 1998-09-18 | Fixing device and image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000098783A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1197813A2 (en) * | 2000-10-11 | 2002-04-17 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and Apparatus for distributing fusing oil more homogenously onto a fixing surface |
-
1998
- 1998-09-18 JP JP10264583A patent/JP2000098783A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1197813A2 (en) * | 2000-10-11 | 2002-04-17 | Heidelberger Druckmaschinen Aktiengesellschaft | Method and Apparatus for distributing fusing oil more homogenously onto a fixing surface |
| EP1197813A3 (en) * | 2000-10-11 | 2005-11-16 | Eastman Kodak Company | Method and Apparatus for distributing fusing oil more homogenously onto a fixing surface |
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