JPH0193777A - Fixing device - Google Patents

Fixing device

Info

Publication number
JPH0193777A
JPH0193777A JP25071987A JP25071987A JPH0193777A JP H0193777 A JPH0193777 A JP H0193777A JP 25071987 A JP25071987 A JP 25071987A JP 25071987 A JP25071987 A JP 25071987A JP H0193777 A JPH0193777 A JP H0193777A
Authority
JP
Japan
Prior art keywords
fixing device
fixing
oil
supporting
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP25071987A
Other languages
Japanese (ja)
Inventor
Kazuo Kagiura
鍵浦 和夫
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP25071987A priority Critical patent/JPH0193777A/en
Publication of JPH0193777A publication Critical patent/JPH0193777A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/20Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2017Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2025Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

PURPOSE:To not only facilitate maintenance but also keep a satisfactory fixing function by supporting a supporting member of a member, which coats a mold release agent, and a cleaning member freely slidably and elastically to a running member. CONSTITUTION:A supporting ember 6 is supported freely attachably to and detachably from the main body of a fixing device by supporting parts 6a and 6b engaged with engaging parts 7a and 7b formed in proper parts of this main body of the fixing device of a fixing roller 1, and the member 6 is always deflected toward the member 6 by a spring 8. Since the member 6 is arranged in this manner, the member 6 is displaced with a point X as the center by the cation of the spring 8 and is set to the normally pressurized state to stably supply oil when the quantity of oil in an oil feeder 3a is reduced. Even if the feeder 3a is slightly deformed, the function of a cleaning blade 4 is kept for a long time because the edge of the blade 4 is only turned around the point X.

Description

【発明の詳細な説明】 (1)発明の目的 (産業上の利用分野) この発明は静電複写機、同プリンタなど、静電記録プロ
セスを利用する画像形成装置、とくにその定着装置に関
するものである。
Detailed Description of the Invention (1) Purpose of the Invention (Field of Industrial Application) The present invention relates to an image forming apparatus that uses an electrostatic recording process, such as an electrostatic copying machine or a printer, and particularly to a fixing device thereof. be.

(2)従来技術と解決すべき課題 像担持体に形成した可転写トナー像を、静電的に紙など
の転写材に転写する周知の画像形成装置においては、静
電的に形成された未定着のトナー像を転写材に固定する
必要がある。
(2) Prior art and issues to be solved In a well-known image forming apparatus that electrostatically transfers a transferable toner image formed on an image carrier to a transfer material such as paper, it is difficult to It is necessary to fix the toner image on the transfer material.

このための定着装置として、ローラなど無端状に走行す
る一対の部材を互に圧接させてその間をトナー像を担持
する転写材を通過させ、このときトナーに圧力ないしは
圧力と熱を加えて、これを転写材に定着固定するような
ものが従来からひろく実用されており、このような定着
手段をとる場合、直接トナーに接触する側の部材にトナ
ーが付着していわゆるオフセット現象が生じて画質の劣
化を招来するので、該部材にシリコンオイルなどの離型
剤を付与することが行なわれている。
As a fixing device for this purpose, a pair of members such as rollers that run in an endless manner are brought into pressure contact with each other, and a transfer material carrying a toner image is passed between them. At this time, pressure or pressure and heat are applied to the toner. Fixing methods have been widely used in the past, and when such a fixing method is used, toner adheres to the member that comes into direct contact with the toner, causing a so-called offset phenomenon, which deteriorates the image quality. Since this may lead to deterioration, a mold release agent such as silicone oil is applied to the member.

第2図はこのような公知の定着装置の一例を略示するも
のである。
FIG. 2 schematically shows an example of such a known fixing device.

同図において、符号1は定着ローラであって、内部に適
宜の熱源5をそなえ、表面に、トナーの付着を可及的に
抑えるために、シリコンゴム、テフロン(商品名)など
のオフセット防止材をコーティングした中空の剛性ロー
ラからなっている。
In the figure, reference numeral 1 denotes a fixing roller, which is equipped with an appropriate heat source 5 inside, and whose surface is made of anti-offset material such as silicone rubber or Teflon (trade name) to suppress adhesion of toner as much as possible. It consists of a hollow rigid roller coated with

符号2は加圧ローラであって、表面はシリコンゴムなど
の弾性層からなっていて、前記定着ローラに適宜のニッ
プ部が形成されるように圧接している。
Reference numeral 2 denotes a pressure roller, the surface of which is made of an elastic layer such as silicone rubber, and is pressed against the fixing roller so as to form an appropriate nip.

前記熱源5によって加熱されるローラ1の表面は不図示
の制御手段によって適温(通常150〜200℃)に維
持され、不図示の画像形成部位において未定着のトナー
像を担持した転写材(不図示)が、矢印B方向から前記
両ローラの圧接ニップ部を通過せしめられる。このとき
、トナーと転写材には圧力ど熱が加えられ、トナーは軟
化溶融して転写材に強固に固着し、図示左方から装置外
に排出されることになる。
The surface of the roller 1 heated by the heat source 5 is maintained at an appropriate temperature (usually 150 to 200°C) by a control means (not shown), and a transfer material (not shown) carrying an unfixed toner image is heated at an image forming area (not shown). ) is caused to pass through the pressure nip between the two rollers from the direction of arrow B. At this time, pressure and heat are applied to the toner and the transfer material, and the toner is softened, melted, and firmly adhered to the transfer material, and is discharged from the apparatus from the left side in the figure.

このような装置においては、トナーが定着ローラ1に直
接接触するので、軟化したトナーが該ローラに付着し、
さらにこれが加圧ローラや次工程で到来する転写材を汚
染するので、定着ローラは定着作動の都度これをクリー
ニングする必要がある。
In such an apparatus, since the toner comes into direct contact with the fixing roller 1, the softened toner adheres to the roller.
Furthermore, since this contaminates the pressure roller and the transfer material arriving in the next process, the fixing roller needs to be cleaned every time the fixing operation is performed.

このために、定着ローラの回転方向にみて、前記ニップ
部よりも下流側に離型剤としてシリコンオイルを収納し
た容器3を配設し、これに連通し、前記定着ローラに当
接する、多孔性の47フ化工チレン樹脂膜部3aを形成
して、シリコンオイルを少量ずつ定着ローラに供給付着
させるようになっている。
For this purpose, a container 3 containing silicone oil as a release agent is disposed downstream of the nip portion when viewed in the rotational direction of the fixing roller, and a porous container 3 communicating with the silicone oil and in contact with the fixing roller is provided. A chemically engineered tyrene resin film portion 3a is formed to supply silicone oil little by little to the fixing roller.

さらに、その下流側には、定着装置の不動部適所に取着
したクリーニングブレード4が配設してあり、その自由
端のひとつのエツジが定着ローラ表面に圧接して、過剰
なシリコンオイルを除去し、さらにこれを定着ローラ全
面に均一にならすとともに付着したトナーを除去する作
用を奏するようになっている。
Further, on the downstream side, a cleaning blade 4 is installed at a suitable position on the immovable part of the fixing device, and one free edge of the cleaning blade 4 comes into pressure contact with the surface of the fixing roller to remove excess silicone oil. Furthermore, it has the function of leveling the toner uniformly over the entire surface of the fixing roller and removing the adhered toner.

このような構成の定着装置においては、適量のシリコン
オイルを常時供給するとともに、これを定着ローラ表面
全面にわたって均一なオイル膜層を形成するためには、
前記膜部3aの定着ローラへの当接状態、クリーニング
ブレードの該ローラへの侵入量を適当に維持することが
きわめて重要である。
In a fixing device having such a configuration, in order to constantly supply an appropriate amount of silicone oil and to form a uniform oil film layer over the entire surface of the fixing roller, it is necessary to
It is extremely important to maintain an appropriate state of contact of the film portion 3a with the fixing roller and an appropriate amount of penetration of the cleaning blade into the roller.

なお、上記侵入量とは、クリーニングブレードが、ロー
ラのない自然状態の場合、架空のローラ径に対してどの
程度重畳しているかを示す値であって、圧接力で管理す
るよりも容易であり、これが過大であるとブレードのエ
ツジがローラに当接せず、いわゆる腹当りの状態になり
、過少であると、圧接作用が弱くなっていずれの場合に
も充分なりリーニング作用を得ることができない。
Note that the above penetration amount is a value that indicates how much the cleaning blade overlaps with the imaginary roller diameter in a natural state without a roller, and is easier to manage than using pressure contact force. If this is too large, the edge of the blade will not come into contact with the roller, resulting in what is called a belly-contact condition, and if it is too small, the pressing action will be weak, making it impossible to obtain a sufficient leaning action in any case. .

前述のオイル供給用の膜部3a、クリーニングブレード
4の定着ローラへの当接部位には、次第にトナーや紙粉
などが蓄積されてゆくことを阻止することは困難である
から、これらの部分は定期的に取り外して清掃する必要
がある。
It is difficult to prevent toner, paper powder, etc. from gradually accumulating in the oil supply film portion 3a and the contact portion of the cleaning blade 4 against the fixing roller, so these portions are Must be removed and cleaned periodically.

しかしながら、前述のオイル収納容器、クリーニングブ
レード4は、いずれも定着装置内適所に固定的に支持さ
れているので、清掃の都度これらを着脱するにはたいへ
ん手間がかかるばかりでなく、−旦取り外ずしたものを
再び装着する場合、前記膜部はこれ自体高精度で成型す
ることが容易ではなく、その気孔率にもバラツキがある
ので、敵量のオイルが供給されるように位置を設定する
ことが難かしく、これにともなってブレードの配置角度
にも調整を要するなど、これら両者を常時それぞれの最
適位置に維持することは容易ではなく、ランニングコス
トの上昇は避けられないところであった。
However, since both the oil storage container and the cleaning blade 4 mentioned above are fixedly supported at appropriate locations within the fixing device, it not only takes a lot of effort to attach and detach them each time cleaning is performed, but also requires a lot of effort to remove them once they are removed. When reinstalling a removed item, the membrane part itself is not easy to mold with high precision, and its porosity varies, so the position must be set so that the appropriate amount of oil is supplied. As a result, it is difficult to maintain these two at their respective optimum positions at all times, and an increase in running costs is unavoidable.

本発明のこのような事態に対処すべくなされたものであ
って、オイル供給部分とクリーニングブレードとの着脱
が容易であり、かつそれらを夫々適当な位置に設定する
にも何等の困難性がなく、メンテナンスがきわめて容易
であるにかかわらず常時良好な定着機能を維持できる。
The present invention has been made to deal with such a situation, and the oil supply part and the cleaning blade can be easily attached and detached, and there is no difficulty in setting them at appropriate positions. Although maintenance is extremely easy, good fixing function can be maintained at all times.

ような定着装置を提供することを目的とするものである
It is an object of the present invention to provide such a fixing device.

(2)発明の構成 (課題を解決する技術手段、その作用)上記の目的を達
成するため、本発明は、定着ローラなど直接定着に関与
する走行部材と、該部材に離型剤を塗布する手段と、前
記部材表面を清掃するクリーニング手段とをそなえた定
着装置において、前記塗布手段とクリーニング手段とを
一体的に支持する支持部材を、定着装置に対して着脱自
在で、かつそのクリーニング手段が前記定着用走行部材
に対して最適の相対位置を取るように配設したことを特
徴とするものである。
(2) Structure of the invention (technical means for solving the problem and its effect) In order to achieve the above object, the present invention provides a traveling member directly involved in fixing, such as a fixing roller, and a releasing agent applied to the member. and a cleaning means for cleaning the surface of the member, wherein a support member that integrally supports the application means and the cleaning means is removably attached to the fixing device, and the cleaning means It is characterized in that it is arranged so as to take an optimal relative position with respect to the fixing traveling member.

このように構成することによって、離型剤塗布手段、ク
リーニングブレードを定着装置から着脱が何等の困難性
もなく容易にできるとともに、取り外したのち再度装着
するさいにも容易に適正な位置に装着することが可能と
なった。
With this configuration, the release agent applicator and the cleaning blade can be easily attached and detached from the fixing device without any difficulty, and they can also be easily attached to the appropriate position after being removed and then reattached. It became possible.

(実施例の説明) 第1図は本発明を、加熱定着ローラと、これに圧接する
加圧ローラとをそなえ、トナー像を担持する転写材をこ
れら両ローラ間を通過させるようにし、多孔性の4フツ
化エチレン膜によって離型剤を定着ローラに供給するよ
うに構成した定着装置に適用した実施例を示すものであ
る。
(Explanation of Embodiments) Fig. 1 shows the present invention, which is equipped with a heat fixing roller and a pressure roller that is in pressure contact with the roller, and a transfer material carrying a toner image is passed between these two rollers. This is an example in which the present invention is applied to a fixing device configured to supply a release agent to a fixing roller using a tetrafluoroethylene film.

定着ローラ、加圧ローラ、熱源ならびにそれらの作用は
基本的に前記第1図に示したものと変りはないので、対
応する部分には同一の符号を付して示してあり、それら
についての説明は必要以外は省略する。
The fixing roller, pressure roller, heat source, and their functions are basically the same as those shown in FIG. is omitted unless necessary.

定着ローラ1の、定着装置の本体適所に形成した係止部
7a、7bに係止されている支持部8a、6bによって
該本体に着脱自在に支持された支持部材6が配設してあ
り、該支持部材6はばね8によって常時定着ローラの方
向に偏倚せしめられている。
A support member 6 is disposed on the fixing roller 1 and is detachably supported on the main body by support parts 8a and 6b that are locked to locking parts 7a and 7b formed at appropriate positions in the main body of the fixing device, The support member 6 is constantly biased toward the fixing roller by a spring 8.

該支持部材6には、定着ローラlに当接して適量ずつシ
リコンオイルをこれに供給するための、多孔性の47フ
化エチレン樹脂膜からなるオイルフィーダ3aとクリー
ニングブレード4が取り付けである。
An oil feeder 3a made of a porous 47-fluorinated ethylene resin film and a cleaning blade 4 are attached to the support member 6 for contacting the fixing roller l and supplying an appropriate amount of silicone oil thereto.

このように構成しであるから、不図示の画像形成部位に
おいて静電的にトナー像を担持した転写材(不図示)が
、矢印方向に搬送されて両ローラのニップ部を通過する
と、トナーは加熱溶融して転写材に強固に付着して装置
外に排出されることになる。
With this configuration, when a transfer material (not shown) electrostatically carrying a toner image at an image forming site (not shown) is conveyed in the direction of the arrow and passes through the nip between the two rollers, the toner is removed. It is heated and melted, firmly adheres to the transfer material, and is discharged from the apparatus.

このとき、定着ローラlの表面には前記オイルフィーダ
3aからオフセット防止用のオイルが供給され、このオ
イルはブレード4によって該ローラ表面に均一に延展さ
れるとともに、過剰なオイルや、付着したトナー、紙粉
などをクリーニングするものとする。
At this time, offset prevention oil is supplied from the oil feeder 3a to the surface of the fixing roller l, and this oil is uniformly spread over the roller surface by the blade 4, and removes excess oil, attached toner, etc. Paper dust, etc. shall be cleaned.

前述のように、支持部材6の支持部6a、6bが定着装
置本体側の係止部7a、7bにそれぞれ係合しているの
であるが、図示の装置においては、係止部7bと支持部
6bとを係合させたときに、クリーニングブレード4が
定着ローラに対して所定の侵入量が得られるように、こ
れら係止部7b、支持部6bの位置を定めてあり、また
、係止部7aと支持部6aとはゆるく係合するようにし
である。さらに、好ましくは、前記係止部7bと支持部
6bとの当接点Xと定着ローラ1の中心1aとを結ぶ直
線と、該ローラ1の外周との交点近傍ににおいてブレー
ドエツジが定着ローラに当接するようにしである。
As mentioned above, the support parts 6a and 6b of the support member 6 are engaged with the locking parts 7a and 7b on the fixing device main body side, respectively, but in the illustrated device, the locking part 7b and the support part The positions of the locking portion 7b and the support portion 6b are determined so that a predetermined amount of penetration of the cleaning blade 4 into the fixing roller is obtained when the cleaning blade 4 is engaged with the fixing roller 6b. 7a and the support portion 6a are designed to loosely engage with each other. Furthermore, preferably, the blade edge contacts the fixing roller near the intersection of the straight line connecting the contact point X between the locking portion 7b and the support portion 6b and the center 1a of the fixing roller 1 and the outer periphery of the roller 1. It should be close to each other.

この場合、ブレードエツジが出接する部分が、上記実施
例の定着ローラのような曲面でなく、たとえば、無端ベ
ルトの一部をなす平面状部分であるような場合には、点
Xから該平面に下した垂線の足の位置にブレードエツジ
が来るように各部の関係構成を定めることによって、上
記の場合とおおむね同様の作用を奏し得ること、は容易
に理解できるところであろう。
In this case, if the part where the blade edge comes into contact is not a curved surface like the fixing roller in the above embodiment, but is a flat part that forms part of an endless belt, for example, from point It is easy to understand that by arranging the relationship between the various parts so that the blade edge is located at the foot of the perpendicular line, the same effect as described above can be achieved.

支持部材6は以上のように配設しであるから、オイルフ
ィーダ3a内のオイルが減少したときには、ばね8の作
用で支持部材6が点Xを中心として回動変位し、常時加
圧状態となって安定的にオイルを供給できる。また、オ
イルフィーダ3aの側に若干の変形、ツブレ量の変化な
どがあっても、ブレードエツジは点Xを中心として回動
するのみであるので、侵入量の変化を可及的に少なく抑
えることができ、長期にわたって該ブレードの機能を維
持できる。
Since the support member 6 is arranged as described above, when the oil in the oil feeder 3a decreases, the support member 6 is rotated about the point X by the action of the spring 8, and is kept in a pressurized state at all times. This allows for a stable supply of oil. Furthermore, even if there is a slight deformation or a change in the amount of breakage on the side of the oil feeder 3a, the blade edge only rotates around point X, so the change in the amount of penetration can be kept as small as possible. This allows the blade to maintain its functionality over a long period of time.

(3)発明の効果 本発明は以上説明したように、定着ローラなと定着に関
与する走行部材に、離型剤を供給する部材とクリーニン
グ部材とを一体に形成し、これを前記走行部材に対して
揺動自在にかつ該部材の方向に弾性的に偏倚するように
配設し、さらに、前記クリーニング部材の実質的な走行
部材に対する変位が可及的に・小さくなるように配した
ので、常時所定の圧力を走行部材に加えて安定的に離型
剤を走行部材に供給することができ、クリーニング部材
の走行部材に対する関係配置をほぼ一定に維持すること
ができるので、該部材による離型剤の走行部材表面への
ならし作用、過剰の離型剤、トナーなどの除去作用を長
期にわたって奏することが可能であるばかりでなく、メ
ンテナンスが容易でとくにランニングコストの低減に資
するところが大である。
(3) Effects of the Invention As explained above, the present invention integrally forms a release agent supplying member and a cleaning member on a traveling member involved in fixing, such as a fixing roller, and attaches this to the traveling member. The cleaning member is arranged so as to be swingable and elastically biased in the direction of the member, and further, the cleaning member is arranged so that the actual displacement of the cleaning member with respect to the traveling member is as small as possible. A predetermined pressure is always applied to the running member to stably supply the mold release agent to the running member, and the relative arrangement of the cleaning member to the running member can be maintained almost constant, so that mold release by the member is possible. Not only is it possible to level out the agent on the surface of the traveling member and remove excess mold release agent and toner over a long period of time, but it is also easy to maintain and particularly contributes to reducing running costs. .

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

第1図は本発明を画像形成装置の定着装置に適用した実
施例を示す要部側面図、 第2図は公知の定着装置の構成を例示する側面図である
。 l・・・定着ローラ、2・・・加圧ローラ、3・・・離
型剤収納容器、4・・・クリーニングブレード、5・φ
・熱源、6・・φ支持部材、8・・・ばね。 第1図 図面の浄書 第2図 手続補正書(方式) %式% (1)  事件の表示 特願昭62−250719号 (2)  発明の名称 定着装置 (3)  補正をする者 事件との関係   出願人 住所 名称     キャノン株式会社 (4)  代理人
FIG. 1 is a side view of essential parts showing an embodiment in which the present invention is applied to a fixing device of an image forming apparatus, and FIG. 2 is a side view illustrating the configuration of a known fixing device. l... Fixing roller, 2... Pressure roller, 3... Release agent storage container, 4... Cleaning blade, 5.φ
-Heat source, 6...φ support member, 8...spring. Figure 1 Engraving Figure 2 Procedural amendment (method) % formula % (1) Indication of the case Japanese Patent Application No. 1983-250719 (2) Name fixing device for the invention (3) Person making the amendment Relationship with the case Applicant Address Name Canon Co., Ltd. (4) Agent

Claims (2)

【特許請求の範囲】[Claims] (1)定着に関与する走行部材と、該走行部材表面に離
型剤を塗布する部材と該表面をクリーニングする部材と
を一体的に支持する支持部材とをそなえた画像形成装置
の定着装置において、前記支持部材を、定着装置の不動
部適所に揺動自在かつ前記走行部材方向に偏倚するよう
に弾性的に支持してなる定着装置。
(1) In a fixing device of an image forming apparatus, which includes a running member involved in fixing, a support member that integrally supports a member that applies a release agent to the surface of the running member, and a member that cleans the surface. . A fixing device, wherein the support member is elastically supported in a fixed position of a fixed portion of the fixing device so as to be swingable and biased in the direction of the traveling member.
(2)クリーニング部材の走行部材への当接部位が、支
持部材の揺動中心から最も近い走行部材表面の位置にあ
るように定めてなる特許請求の範囲第1項記載の定着装
置。
(2) The fixing device according to claim 1, wherein the contact portion of the cleaning member to the running member is determined to be at a position on the surface of the running member closest to the center of swing of the support member.
JP25071987A 1987-10-06 1987-10-06 Fixing device Pending JPH0193777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25071987A JPH0193777A (en) 1987-10-06 1987-10-06 Fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25071987A JPH0193777A (en) 1987-10-06 1987-10-06 Fixing device

Publications (1)

Publication Number Publication Date
JPH0193777A true JPH0193777A (en) 1989-04-12

Family

ID=17212034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25071987A Pending JPH0193777A (en) 1987-10-06 1987-10-06 Fixing device

Country Status (1)

Country Link
JP (1) JPH0193777A (en)

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