JPH10247026A - Heater and image forming device - Google Patents
Heater and image forming deviceInfo
- Publication number
- JPH10247026A JPH10247026A JP9065346A JP6534697A JPH10247026A JP H10247026 A JPH10247026 A JP H10247026A JP 9065346 A JP9065346 A JP 9065346A JP 6534697 A JP6534697 A JP 6534697A JP H10247026 A JPH10247026 A JP H10247026A
- Authority
- JP
- Japan
- Prior art keywords
- film
- heating
- heating element
- thin film
- nip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は被加熱体上に形成さ
れた顕画像を該被加熱体に定着する加熱装置、およびこ
の加熱装置を定着装置として適用した複写機やプリンタ
ー等の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 heating device for fixing a visible image formed on a heated object to the heated object, and an image forming apparatus such as a copying machine or a printer using the heating device as a fixing device. It is about.
【０００２】[0002]
【従来の技術】従来、被加熱体上に形成された顕画像を
該被加熱体に定着する定着装置としての加熱装置には熱
ローラー方式が一般的であった。しかしながら、大きな
熱容量を要し、電源投入から画像出力までの装置立上り
に時間を要した。2. Description of the Related Art Conventionally, a heating roller system has been generally used as a heating device as a fixing device for fixing a visible image formed on a heated object to the heated object. However, a large heat capacity is required, and it takes time to start up the apparatus from power-on to image output.
【０００３】そこで、最近では省電力化、および電源投
入から画像出力までの時間短縮を実現するために、例え
ば特開昭６３−３１３１８２号公報、特開平２−１５７
８７８号公報に記載されているようなフィルム加熱定着
方式、つまり薄膜フィルム（以下、フィルムと称す）を
介して被加熱体を加熱する加熱体と、この被加熱体を前
記フィルムを介して前記加熱体に加圧する加圧体とを有
する加熱装置を定着装置として適用することが提案され
ている。Therefore, recently, in order to realize power saving and shorten the time from power-on to image output, for example, JP-A-63-313182 and JP-A-2-157.
No. 878, a film heating and fixing method, that is, a heating element that heats an object to be heated via a thin film (hereinafter, referred to as a film), and heating the object to be heated through the film It has been proposed to apply, as a fixing device, a heating device having a pressing body that presses the body.
【０００４】図１２は最大通紙幅がＡ３サイズであるフ
ィルム加熱定着方式による従来の加熱装置を示す概略構
成図である。１０１はステーであり、このステー１０１
は加熱体１０３を露呈させて支持した横断面Ｕ字状の本
体部１０５と該本体部を対向する加圧ローラ１０４側へ
加圧する加圧部１０６とで構成されている。１０２はス
テー１に外嵌させてある横断面円形の耐熱性フィルム
（以下、フイルムと略称する）である。FIG. 12 is a schematic configuration diagram showing a conventional heating device based on a film heating and fixing method in which the maximum sheet passing width is A3 size. 101 is a stay, and this stay 101
Is composed of a main body portion 105 having a U-shaped cross section that exposes and supports the heating body 103 and a pressing portion 106 that presses the main body portion toward the opposing pressing roller 104. Reference numeral 102 denotes a heat-resistant film (hereinafter, abbreviated as a film) having a circular cross-section and externally fitted to the stay 1.
【０００５】図１３は上記加熱体１０３の途中を省略
し、一部切り欠いた平面図である。この加熱体１０３は
フィルム１０２もしくは被加熱体としての紙等の記録材
Ｐの搬送方向ａに対して直角方向を長手とする細長の耐
熱性・絶縁性・良熱伝導性の基板１３１、この基板１３
１の表面側の短手方向中央部に基板長手に沿って形成具
備させた抵抗発熱体１３２、この抵抗発熱体を形成した
加熱体表面を保護させた耐熱性オーバーコート層１３
４、抵抗発熱体１３２の長手両端部の給電用電極１３３
・１３３とともに、基板裏面側に具備させた加熱体温度
を検知するサーミスタ等の検温素子１０７等からなる全
体に低熱容量の線状加熱体を基板構成体とする。この加
熱体１０３は抵抗発熱体１３２を図１２において、剛性
・耐熱性を有するステー１０１の下面側に下向きに露呈
させて固定配設してある。この種の加熱体１０３として
は、例えば特開平４−４４０７５号公報〜特開平４−４
４０８３号公報、特開平４−２０４９８０号公報〜特開
平４−２０４９８４号公報等に開示された所謂テンショ
ンレスタイプがある。[0005] FIG. 13 is a plan view of the heating element 103 in which a part of the heating element 103 is omitted and partially cut away. The heating element 103 is an elongated heat-resistant, insulating, and heat-conductive substrate 131 whose longitudinal direction is perpendicular to the conveying direction a of the film 102 or a recording material P such as paper as an object to be heated. 13
1, a resistance heating element 132 formed along the longitudinal direction of the substrate at the center in the short direction on the surface side, and a heat-resistant overcoat layer 13 protecting the heating element surface on which the resistance heating element is formed.
4. Power supply electrodes 133 at both longitudinal ends of the resistance heating element 132
Along with 133, a linear heating element having a low heat capacity and including a temperature detecting element 107 such as a thermistor provided on the back side of the substrate for detecting the temperature of the heating element is used as the substrate structure. In FIG. 12, the heating element 103 is provided with a resistance heating element 132 fixedly exposed downward to the lower surface of the stay 101 having rigidity and heat resistance. Examples of this type of heating element 103 include, for example, JP-A-4-44075 to JP-A-4-4.
There is a so-called tensionless type disclosed in JP-A No. 4083, JP-A-4-204980 to JP-A-4-204498, and the like.
【０００６】上記加熱体１０３の基板１３１は、例え
ば、アルミナや窒化アルミニウム等の厚み１ｍｍ・幅１
０ｍｍ・長さ３３０ｍｍのものである。また、抵抗発熱
体１３２は例えば、Ａｇ／Ｐｄ（銀パラジウム）、Ｒｕ
Ｏ2、Ｔａ 2Ｎ等の電気抵抗材料をスクリーン印刷等によ
り、厚み約１０μｍ、幅１〜３ｍｍの線状もしくは細帯
状に塗工して形成したものである。The substrate 131 of the heater 103 is made of, for example, alumina or aluminum nitride having a thickness of 1 mm and a width of 1 mm.
It has a length of 0 mm and a length of 330 mm. The resistance heating element 132 is made of, for example, Ag / Pd (silver palladium) or Ru.
It is formed by applying an electric resistance material such as O 2 , Ta 2 N or the like by screen printing or the like into a linear or narrow band shape having a thickness of about 10 μm and a width of 1 to 3 mm.
【０００７】給電用電極１３３・１３３は例えばＡｇ等
のスクリーン印刷パターン層、オーバーコート層１３４
は例えば約１０μｍ厚の耐熱体ガラス層である。The power supply electrodes 133 and 133 are made of, for example, a screen printing pattern layer of Ag or the like, and an overcoat layer 134.
Is, for example, a heat-resistant glass layer having a thickness of about 10 μm.
【０００８】上記加圧ローラ１０４は、加熱体１０３と
の間にフィルム１０２を挟んで圧接ニップ部（定着ニッ
プ部）Ｎを形成し、且つフィルム１０２を回転駆動させ
るフィルム外面接触駆動手段として作用する。このフィ
ルム駆動ローラ兼加圧ローラ１０４は芯金１０４ａとシ
リコンゴム等よりなる弾性体層１０４ｂと最外層の離形
層１０４ｃよりなり、不図示の軸受け手段・付勢手段に
より所定の押圧力をもってフィルム１０２を挟ませて加
熱体１０３の表面に圧接させて配設してある。この加圧
ローラ１０４はモータＭによる回転駆動により、この加
圧ローラ１０４とフィルム１０２の外面との摩擦力で該
フィルムに搬送力を付与する。The pressure roller 104 forms a pressure contact nip portion (fixing nip portion) N with the film 102 interposed between the pressure roller 104 and the heat roller 103 and acts as a film outer surface contact driving means for driving the film 102 to rotate. . The film driving roller and pressure roller 104 is composed of a cored bar 104a, an elastic layer 104b made of silicon rubber or the like, and an outermost release layer 104c. The heating element 103 is disposed so as to be pressed against the surface of the heating element 103 with the element 102 interposed therebetween. The pressure roller 104 is rotated by a motor M to apply a conveying force to the film by a frictional force between the pressure roller 104 and the outer surface of the film 102.
【０００９】次に動作を説明する。Next, the operation will be described.
【００１０】上記加熱体１０３は、抵抗発熱体１３２の
長手両端部の給電用電極１３３・１３３に対する給電に
より該抵抗発熱体が長手全長にわたって発熱することで
昇温し、その昇温が検温素子１０７で検知される。その
検温素子１０７の出力をＡ／Ｄ変換しＣＰＵ１０８に取
り込み、その情報をもとにトライアック１０９により抵
抗発熱体１３２に通電するＡＣ電源１１０のＡＣ電圧を
位相、周波数制御等により、加熱体通電電力を制御する
ことで、加熱体１０３の温度制御を行う。The temperature of the heating element 103 rises by the fact that the resistance heating element generates heat over its entire length by power supply to the power supply electrodes 133 at both ends of the resistance heating element 132, and the temperature rise is caused by the temperature measuring element 107. It is detected by. The output of the temperature detecting element 107 is A / D converted and taken into the CPU 108, and based on the information, the AC voltage of the AC power supply 110, which is supplied to the resistance heating element 132 by the triac 109, is controlled by the phase, frequency, etc. Is controlled, the temperature of the heating body 103 is controlled.
【００１１】即ち、検温素子１０７の検知温度が所定の
設定温度より低いと加熱体１０３が昇温するように、ま
た、高い場合は加熱体１０３が降温するように通電を制
御することで加熱体１０３は定着時、一定の温度に調整
される。而して、加熱体１０３の温度が所定に立ち上が
り、かつ加圧ローラ１０４の回転によるフィルム１０２
の回転周速度が定常化した状態において、画像定着すべ
き記録材Ｐが加熱体１０３と加圧ローラ１０４とで形成
される圧接ニップ部Ｎの間に、不図示の画像形成装置の
転写部から搬送されて導入され、フィルム１０２と一緒
に圧接ニップ部Ｎを挟持搬送されることにより、加熱体
１０３の熱がフィルム１０２を介して記録材Ｐに付与さ
れ、記録材Ｐ上の未定着顕画像（トナー画像）Ｔが記録
材Ｐ面に加熱定着される。そして、圧接ニップ部Ｎを通
った記録材Ｐはフィルム１０２の面から分離されて搬送
される。この場合、記録材Ｐは中央基準で通紙される。That is, the power supply is controlled so that the temperature of the heating element 103 rises when the temperature detected by the temperature detecting element 107 is lower than a predetermined set temperature, and the temperature of the heating element 103 decreases when the temperature is high. 103 is adjusted to a constant temperature during fixing. Thus, the temperature of the heating element 103 rises to a predetermined value, and the film 102 is rotated by the rotation of the pressure roller 104.
When the rotational peripheral speed of the recording medium P is stabilized, the recording material P on which the image is to be fixed is transferred from the transfer section of the image forming apparatus (not shown) between the pressure nip N formed by the heating body 103 and the pressure roller 104. The heat is applied to the recording material P via the film 102 by being conveyed and introduced, and sandwiched and conveyed by the press-contact nip portion N together with the film 102, and the unfixed visible image on the recording material P (Toner image) T is heated and fixed on the surface of the recording material P. The recording material P that has passed through the pressure nip N is separated from the surface of the film 102 and is conveyed. In this case, the recording material P passes through the center.
【００１２】上記フィルム１０２はステー１０１に対し
周長が余裕を持ってルーズに外嵌しているため、図１４
に示すようにフィルム２とステー１の間に隙間を持って
おり、記録材Ｐがニップ部Ｎに進入する前、フィルム２
はステー１に対し図１４（ａ）に示す端部、図１４
（ｂ）に示す中央部ともに同じ隙間Ｓ０を持って回転し
ている。Since the film 102 is loosely fitted around the stay 101 with a sufficient peripheral length, FIG.
As shown in FIG. 3, there is a gap between the film 2 and the stay 1, and before the recording material P enters the nip portion N, the film 2
Is the end shown in FIG. 14 (a) with respect to the stay 1, and FIG.
Both central portions shown in FIG. 11B rotate with the same gap S0.
【００１３】[0013]
【発明が解決しようとする課題】しかしながら、従来の
フィルム加熱定着方式においては、フィルム１０２の軸
方向長さＬに対し幅の狭い記録材Ｐ（以後、小サイズ紙
と称する）、例えば２Ｌ／３程度の幅の記録材をフィル
ム軸方向のほぼ中央部に連続的に通すと、非通紙部では
記録材に熱が奪われない。この結果、記録材に熱が奪わ
れない非通紙部に対向する加圧ローラ１０４の温度が、
記録材に熱が奪われる通紙部より高温になるため、熱膨
張により加圧ローラ１０４の外径は通紙部に対して非通
紙部の方が大きくなる。However, in the conventional film heat fixing method, a recording material P (hereinafter, referred to as small size paper) having a narrow width relative to the axial length L of the film 102, for example, 2L / 3. When a recording material having a small width is continuously passed through a substantially central portion in the film axial direction, heat is not taken by the recording material in the non-paper passing portion. As a result, the temperature of the pressure roller 104 facing the non-sheet passing portion where heat is not deprived by the recording material becomes
Since the temperature is higher than that of the paper passing portion where heat is taken by the recording material, the outer diameter of the pressure roller 104 is larger in the non-paper passing portion than in the paper passing portion due to thermal expansion.
【００１４】すると、加圧ローラ４の周速も非通紙部の
方が速くなる。つまり、ニップ部Ｎでのフィルム１０２
の搬送速度が通紙部より非通紙部の方が大きくなり、速
度差が生じ、フイルム１０２は通紙部と非通紙部でねじ
れ力が働き、ニップ部Ｎの直前でフィルム１０２とステ
ー１の間の隙間量が端部では図１５（ａ）に示すように
隙間Ｓ1 と小さく、中央部では図１５（ｂ）に示すよう
に隙間Ｓ2 と大きくなり、Ｓ２＞Ｓ０＞Ｓ１という関係
になるため、図１６に示すようにニップ部Ｎの直前でフ
ィルム１０２が１０２’のようにたるんだ状態になる。Then, the peripheral speed of the pressure roller 4 is also higher in the non-sheet passing portion. That is, the film 102 in the nip portion N
The transport speed of the non-sheet-passing portion becomes larger than that of the sheet-passing portion, causing a speed difference. The film 102 is subjected to a twisting force between the sheet-passing portion and the non-sheet-passing portion. as small as the clearance S 1 as shown in FIG. 15 (a) in the gap amount is an end between 1, the central portion becomes large and the gap S 2, as shown in FIG. 15 (b), that S2>S0> S1 Because of the relationship, as shown in FIG. 16, just before the nip portion N, the film 102 is slackened like 102 ′.
【００１５】このような状態で記録材Ｐがニップ部Ｎに
進入してくると、記録材先端はたるんだフィルム１０２
に当接して進入抵抗を受け、記録材先端の長手方向にお
けるニップ部Ｎへの進入タイミングにばらつきが発生
し、この記録材Ｐにしわが発生するという課題があっ
た。When the recording material P enters the nip portion N in such a state, the leading edge of the recording material becomes slack.
The recording material P has a problem that the timing of entering the nip portion N in the longitudinal direction of the recording material varies due to the penetration resistance, and the recording material P is wrinkled.
【００１６】本発明は上記のような従来の課題を解決す
るためになされたもので、フイルムのたるみをなくし、
被加熱体としての記録材を円滑に搬送できる加熱装置を
得ることを目的とする。また、この加熱装置を定着装置
として適用して高品質の画像形成を行う画像形成装置を
得ることを目的とする。The present invention has been made to solve the above-mentioned conventional problems, and eliminates the slack of the film.
It is an object of the present invention to provide a heating device that can smoothly convey a recording material as a member to be heated. It is another object of the present invention to provide an image forming apparatus that forms a high-quality image by applying this heating device as a fixing device.
【００１７】[0017]
【課題を解決するための手段】請求項１に記載の発明に
係る加熱装置は、薄膜フィルムを介して被加熱体を加熱
する加熱体と、前記加熱体との間に形成したニップ部に
導入された前記被加熱体を前記薄膜フィルムを介して該
加熱体に加圧する加圧体とを有する加熱装置において、
前記加熱体を支持し前記薄膜フィルムをガイドするフイ
ルム支持手段を備え、前記フイルム支持手段両端部の前
記ニップ部上流側面に突状部を形成し、通紙を中央基準
としたものである。According to a first aspect of the present invention, there is provided a heating device for heating a heating object via a thin film, and introducing the heating device into a nip formed between the heating element and the heating element. And a pressurizing body that presses the heated body to the heated body through the thin film film,
A film supporting means for supporting the heating element and guiding the thin film is provided, and a projecting portion is formed on an upstream side surface of the nip portion at both ends of the film supporting means, and paper passing is set as a center reference.
【００１８】請求項２に記載の発明に係る加熱装置は、
通紙基準が中央部であり、フイルム支持手段両端部のニ
ップ部上流側面に形成した突状部の長さが、片側で加圧
体による薄膜フィルムの加圧長さの１０％以上としたも
のである。The heating device according to the second aspect of the present invention comprises:
The paper passing reference is the center, and the length of the projecting portion formed on the upstream side of the nip at both ends of the film supporting means is 10% or more of the pressing length of the thin film by the pressing body on one side. It is.
【００１９】請求項３に記載の発明に係る加熱装置は、
フィルム支持手段のニップ部上流側面の中央部から両端
部の突状部までになだらかな変化する連続壁面を形成し
たものである。A heating device according to a third aspect of the present invention is
A continuous wall surface that smoothly changes from the central portion of the nip portion upstream side surface of the film supporting means to the protruding portions at both ends is formed.
【００２０】請求項４に記載の発明に係る加熱装置は、
薄膜フィルムを介して被加熱体を加熱する加熱体と、前
記加熱体との間に形成したニップ部に導入された前記被
加熱体を薄膜フィルムを介して該加熱体に加圧する加圧
体とを有する加熱装置において、前記フイルム支持手段
の両端部を除く中央部であって、前記ニップ部を形成す
る面とは反対の面に突状部を形成したものである。A heating device according to a fourth aspect of the present invention comprises:
A heating element for heating the object to be heated via the thin film, and a pressurizing element for pressing the object to be heated introduced into the nip formed between the heating element and the heating element via the thin film. Wherein a projecting portion is formed on a central portion of the film supporting means excluding both end portions thereof and a surface opposite to a surface forming the nip portion.
【００２１】請求項５に記載の発明に係る加熱装置は、
薄膜フィルムを介して被加熱体を加熱する加熱体と、前
記加熱体との間に形成したニップ部に導入された前記被
加熱体を前記薄膜フィルムを介して該加熱体に加圧する
加圧体とを有する加熱装置において、前記加熱体を支持
し前記薄膜フィルムをガイドするフイルム支持手段を備
え、前記フイルム支持手段の一端側通紙領域と他端側の
非通紙領域との前記ニップ部上流側面に突状部を形成
し、通紙を端部基準としたものである。[0021] The heating device according to the fifth aspect of the present invention comprises:
A heating element for heating the object to be heated via the thin film, and a pressurizing element for pressing the object to be heated introduced into the nip formed between the heating element and the heating element via the thin film A film supporting means for supporting the heating element and guiding the thin film, wherein the nip portion upstream of the one-side paper passing area and the other-side non-paper passing area of the film supporting means. A protruding portion is formed on the side surface, and paper passing is defined as an end portion.
【００２２】請求項６に記載の発明に係る加熱装置は、
フィルム支持手段のニップ部上流側面に、長手全域にフ
ィルムしごき部を形成したものである。A heating device according to a sixth aspect of the present invention comprises:
On the upstream side of the nip portion of the film supporting means, a film ironing portion is formed over the entire length.
【００２３】請求項７に記載の発明に係る画像形成装置
は、画像形成手段と、この画像形成手段から送り出され
た被加熱体を加熱して該被加熱体上に形成された顕画像
を定着する前記請求項１から請求項６のうちのいずれか
１項記載の加熱装置とを備えたものである。According to a seventh aspect of the present invention, there is provided an image forming apparatus, comprising: an image forming unit; and a heating unit which is fed from the image forming unit, and fixes a visible image formed on the heating unit. And a heating device according to any one of claims 1 to 6.
【００２４】[0024]
【発明の実施の形態】以下、本発明の実施の一形態を説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.
【００２５】実施の形態例１．図１は実施の形態１によ
る加熱装置を示す概要図であり、（ａ）は斜視図、
（ｂ）はその一部の側面図である。図において、１はフ
ィルム支持手段としてのステーであり、このステー１は
加熱体３を露呈させて支持した横断面Ｕ字状の本体部５
と、この本体部５に組付け該本体部を対向する加圧ロー
ラ４側へ加圧する横断面コ字状の加圧部６とで構成され
ている。２はステー１に外嵌させてある横断面円形の耐
熱性フィルムであり、このフイルム２は内周長が加熱体
３を含むステー１の外周長に対し例えば３ｍｍ程度大き
くしてある。従ってステー１に対し周長が余裕を持って
ルーズに外嵌されている。このステー１はフィルム２を
介して加圧ローラ４で長手方向全体に加圧され、ニップ
部Ｎを形成している。Embodiment 1 FIG. 1 is a schematic diagram showing a heating device according to Embodiment 1, (a) is a perspective view,
(B) is a partial side view thereof. In the drawing, reference numeral 1 denotes a stay as a film supporting means, and the stay 1 is a main body 5 having a U-shaped cross section which exposes and supports the heating element 3.
And a pressing unit 6 having a U-shaped cross section for assembling the main unit 5 and pressing the main unit toward the opposing pressing roller 4. Reference numeral 2 denotes a heat-resistant film having a circular cross-section which is fitted to the stay 1 outside. The film 2 has an inner peripheral length larger than the outer peripheral length of the stay 1 including the heating element 3 by, for example, about 3 mm. Therefore, the circumference is loosely fitted to the stay 1 with a margin. The stay 1 is pressed in the entire longitudinal direction by a pressing roller 4 via a film 2 to form a nip portion N.
【００２６】フィルム２は熱容量を小さくしてクイック
スタート性を向上させるために、その膜厚は１００μｍ
以下、好ましくは５０μｍ以下２０μｍ以上の耐熱性の
あるＰＴＦＥ、ＰＦＡ、ＦＥＰ等の単層フィルム、ある
いはポリイミド、ポリアミドイミド、ＰＥＥＫ、ＰＥ
Ｓ、ＰＰＳ等のフィルムの外周表面にＰＴＦＥ、ＰＦ
Ａ、ＦＥＰ等をコーティングした複合層フィルムを使用
する。本実施の形態１ではポリイミドフィルムの外周表
面にＰＴＦＥをコーティングした複合層フィルムを使用
している。The film 2 has a thickness of 100 μm in order to reduce the heat capacity and improve the quick start property.
Hereinafter, preferably, a single-layer film of PTFE, PFA, FEP or the like having a heat resistance of 50 μm or less and 20 μm or more, or polyimide, polyamideimide, PEEK, PE
PTFE, PF on the outer peripheral surface of film such as S, PPS
A composite film coated with A, FEP or the like is used. In the first embodiment, a composite layer film in which the outer peripheral surface of a polyimide film is coated with PTFE is used.
【００２７】上記ステー１の構成要素である本体部５は
加熱体を支持し前記薄膜フィルムをガイドするので、そ
の本体部５の前記ニップ部上流側面に突状部７を形成し
たものである。The main body 5, which is a component of the stay 1, supports the heating element and guides the thin film. Therefore, a projection 7 is formed on the upstream side of the nip of the main body 5.
【００２８】次に動作について説明する。Next, the operation will be described.
【００２９】上記構成のステー１にフィルム２をセット
すると、フィルム２の走行形状は図２に示すように、両
端部は突起部７によって外側へ付勢され、中央部は両端
部よりフィルム回転中心方向にへこんだ状態となる。一
方、記録材Ｐとして最大通紙幅Ｗ（Ａ３サイズ）より小
さいＡ４縦サイズの紙を通紙すると、上記のように非通
紙部に対応する加圧ロール４の両端部の径が加熱により
膨張して、この加圧ローラ４の両端部でフィルムを速く
搬送し、中央部で遅く搬送する。このため、長手中央部
のフィルムはフィルム回転半径外側方向に膨らんでくる
が（図中に破線で表示）、予め凹んだ状態に配設されて
いるので、前記図１６に示すほどの膨らみは発生しな
い。このため、紙先端中央部はニップ進入時、フィルム
回転半径外側方向に膨らんだフイルムと当接することが
なく、抵抗を受けてしわを発生するということがない。When the film 2 is set on the stay 1 having the above structure, the running shape of the film 2 is urged outward by the protrusions 7 as shown in FIG. The state is depressed in the direction. On the other hand, when a sheet of A4 vertical size smaller than the maximum sheet passing width W (A3 size) is passed as the recording material P, the diameter of both ends of the pressure roll 4 corresponding to the non-sheet passing portion expands due to heating as described above. Then, the film is transported quickly at both ends of the pressure roller 4 and is transported slowly at the center. As a result, the film in the center of the longitudinal direction swells outward in the radius of rotation of the film (indicated by a broken line in the drawing), but since it is arranged in a concave state in advance, the swelling as shown in FIG. do not do. For this reason, the central portion of the leading end of the paper does not come into contact with the film bulging outward in the radius of rotation of the film when the nip enters, so that wrinkles are not generated due to resistance.
【００３０】本体部５のフィルム回転半径方向外側に突
設させた突起部７の長さＴを変えてしわの発生頻度を測
定したところ 長さＴ しわ発生頻度（Ａ４縦通紙時） 最大通紙幅Ｗの ０％ ４７％ ５％ ２４％ １０％ ９％ １５％ ５％ ２０％ ３％ ２５％ ７％ ３０％ ４％ ３５％ １１％ ４０％ １６％ ４５％ ４３％ ５０％ ３８％ 以上のような結果を得た。The frequency of occurrence of wrinkles was measured by changing the length T of the protrusion 7 projecting outward in the film rotation radial direction of the main body 5. Length T Wrinkle occurrence frequency (A4 vertical paper) 0% 47% 5% 24% 10% 9% 15% 5% 20% 3% 25% 7% 30% 4% 35% 11% 40% 16% 45% 43% 50% 38% of the paper width W Results were obtained.
【００３１】長さＴが加圧体４による薄膜フィルム２の
加圧長さの１０％〜３０％において、特に効果が高い。
通紙幅Ａ３に対しＡ４縦サイズを通紙すると、非通紙部
の長さＴは通紙幅Ａ３に対し１０〜１５％の間であり、
効果の出始める長さと一致する。これは、非通紙部のガ
イド形状が通紙部より外側に位置することが重要なため
と考えられる。The effect is particularly high when the length T is 10% to 30% of the pressing length of the thin film 2 by the pressing body 4.
When A4 vertical size paper is passed through the paper passing width A3, the length T of the non-paper passing portion is between 10 and 15% of the paper passing width A3,
Matches the length at which the effect starts to appear. This is considered because it is important that the guide shape of the non-sheet passing portion is located outside the sheet passing portion.
【００３２】また、長さＴの１０％において、突起部７
の突起高さＳを変えてしわの発生頻度を測定したところ 高さＳ（ｍｍ） しわ発生頻度（Ａ４縦通紙時） ０．００ ４７％ ０．２５ ５１％ ０．５０ ２７％ １．００ ６％ １．５０ ３％ ２．００ ４％ という結果を得た。この結果より、高さＳを高くしてゆ
くとしわ発生頻度が低くなるのがわかる。At 10% of the length T, the protrusion 7
When the frequency of occurrence of wrinkles was measured by changing the height S of the protrusions, the height S (mm) The frequency of occurrence of wrinkles (at the time of A4 vertical paper feeding) 0.00 47% 0.25 51% 0.50 27% 1.00 The result was 6% 1.50 3% 2.00 4%. From this result, it can be seen that as the height S increases, the frequency of wrinkles decreases.
【００３３】実施の形態２．図３は実施の形態２におけ
る加熱装置を示す概要図であり、（ａ）は平面図、
（ｂ）はその一部の側面図である。本実施の形態２は、
フィルム支持手段としてのステー１の両端部を除く中央
部であって、前記ニップ部を形成する面とは反対の面に
突状部８を形成したものである。Embodiment 2 FIG. FIG. 3 is a schematic diagram showing a heating device according to Embodiment 2, (a) is a plan view,
(B) is a partial side view thereof. In the second embodiment,
A protrusion 8 is formed on a central portion of the stay 1 as a film supporting means except for both ends, and on a surface opposite to a surface on which the nip portion is formed.
【００３４】図４はフィルム２を除いた上記ステー１の
構成部品の分解斜視図であり、５は本体部、６は中央部
上面に突起部８を形成した加圧部、９、９は加圧部６の
端部に取付ける端部体、１０、１０は端部体９、９の外
側において加圧部６に組付け該加圧部を加圧する加圧力
付与部である。FIG. 4 is an exploded perspective view of the components of the stay 1 excluding the film 2, wherein 5 is a main body, 6 is a pressurizing portion having a projection 8 formed on the upper surface of a central portion, and 9 and 9 are pressurizing portions. End members 10 and 10 attached to the ends of the pressure unit 6 are pressure applying units that are assembled to the pressing unit 6 outside the end units 9 and 9 and pressurize the pressing unit.
【００３５】次に動作について証明する。Next, the operation will be proved.
【００３６】本実施の形態２は、上記の構成により、突
状部８によりフィルム中央部の径を図３（ｂ）に示すＪ
方向に両端部より長くしたことにより、中央部のＫ方向
の長さが両端部より短くなる。このため、ニップ上流側
におけるフィルムは、前記図２に示すように、中央部が
両端部よりフィルム回転中心方向にへこむ形状となる。According to the second embodiment, the diameter of the central portion of the film is set to J as shown in FIG.
The length in the K direction at the center is shorter than both ends by making the length longer than both ends in the direction. For this reason, as shown in FIG. 2, the film on the upstream side of the nip has a shape in which the center is depressed from both ends in the direction of the center of rotation of the film.
【００３７】このため、小サイズ紙を通紙してフィルム
両端部より中央部の速度が遅くなり、フィルム中央部に
たるみが発生しても図１６の実線に示すフィルム走行形
状ほどのたるみとはならず、紙先端がニップ部進入時に
抵抗を受けることがなく、円滑に搬送され、しわが発生
しにくい。For this reason, even when small-size paper is passed through, the speed at the center becomes slower than at both ends of the film, and even if the center of the film becomes slack, the slack of the film running shape shown by the solid line in FIG. In addition, the leading edge of the paper does not receive resistance when entering the nip portion, is conveyed smoothly, and is hardly wrinkled.
【００３８】長手方向中央部と両端部の高さ差ｈを変え
てしわの発生頻度を測定したところ 高さ差ｈ（ｍｍ） しわ発生頻度（％） −１．０ ７３ −０．５ ５４ ０．０ ６３ ０．５ ２１ １．０ ７ １．５ ９ ２．０ ４ と、中央部の高さが両端部より高いときしわ発生頻度が
低くなった。The frequency of occurrence of wrinkles was measured by changing the height difference h between the center and both ends in the longitudinal direction. Height difference h (mm) Wrinkle occurrence frequency (%) -1.0 73 -0.5 540 0.0630.5211.071.592.04, the wrinkle occurrence frequency was low when the height at the center was higher than both ends.
【００３９】実施の形態３．図５は実施の形態３におけ
る加熱装置を示す概要図であり、（ａ）は斜視図、
（ｂ）は一部の側面図である。本実施の形態３は、前記
図１に示す本体部５にさらに、長手方向中央部のニップ
部上流側にフィルムしごき部Ｒを設けたものであり、こ
のフィルムしごき部Ｒのフィルム摺動面の高さＨは両端
部のフィルムガイド面である突状部７と同じであり、し
ごき部Ｒと両端部の突状部７で長手方向全域にわたって
フィルムをしごく構成となっている。Embodiment 3 FIG. 5 is a schematic diagram showing a heating device according to Embodiment 3, (a) is a perspective view,
(B) is a partial side view. In the third embodiment, the main body portion 5 shown in FIG. 1 is further provided with a film ironing portion R on the upstream side of the nip portion at the center in the longitudinal direction, and a film sliding surface of the film ironing portion R is provided. The height H is the same as the protruding portions 7 which are the film guide surfaces at both ends, and the ironing portion R and the protruding portions 7 at both ends form a structure in which the film is drawn over the entire region in the longitudinal direction.
【００４０】図１の加熱装置では最大通紙幅Ａ３を通紙
した際に、本体部５のニップ部上流側面に形成した突状
部７の段差により、フィルム２にしわが寄ることがあっ
た。しかし、本実施の形態３はフィルム支持手段のニッ
プ部上流側面に、長手全域にフィルムしごき部Ｒを形成
したので、ニップ部上流側でフィルム２にしわが寄るこ
とがなくなった。このしごき部Ｒの高さＨは両端部の突
状部７より高くても低くてもフィルム２と接触してしご
き構成になっていれば同一の効果が得られる。In the heating device shown in FIG. 1, when the maximum paper passing width A3 is passed, the film 2 may be wrinkled due to the step of the projecting portion 7 formed on the upstream side of the nip portion of the main body 5. However, in the third embodiment, the film squeezed portion R is formed on the entire length of the film support means on the upstream side of the nip portion, so that the film 2 does not wrinkle on the upstream side of the nip portion. Even if the height H of the ironing portion R is higher or lower than the protruding portions 7 at both ends, the same effect can be obtained as long as it comes into contact with the film 2 and is ironed.
【００４１】実施の形態４．図６は実施の形態４におけ
る加熱装置を示す斜視図であり、本体部５のニップ部上
流側面の両端部に突状部７、中央部にフィルムしごき部
Ｒを形成するとともに、加圧体５の中央部上面に突状部
８を形成し、加圧体５の両端面と突状部８の高さ差ｈを
変えてしわ発生頻度を測定したところ 高さ差ｈ（ｍｍ） しわ発生頻度（％） 部材８０なし ６ −１．０ ９ −０．５ ２ ０．０ ３ ０．５ ０ １．０ ０ １．５ ０ ２．０ ０ と、突起部８により、フィルム２のしわ発生頻度が低下
した。Embodiment 4 FIG. FIG. 6 is a perspective view showing a heating device according to the fourth embodiment, in which a projecting portion 7 is formed at both ends of an upstream side surface of a nip portion of a main body portion 5 and a film ironing portion R is formed at a central portion. A protrusion 8 is formed on the upper surface of the central portion of the sample, and wrinkle occurrence frequency is measured by changing the height difference h between both end surfaces of the pressing body 5 and the protrusion 8. Height difference h (mm) Wrinkle occurrence frequency (%) No member 80 6-1.09 -0.5 2 0.03 0.50 1.00 1.50 2.00 2.00 and the wrinkling frequency of the film 2 due to the projection 8 Decreased.
【００４２】実施の形態５．図７は実施の形態５におけ
る加熱装置を示す概要図であり、（ａ）は斜視図、
（ｂ）は一部の側面図である。この加熱装置において
は、ステー１のニップ部上流側のフィルム２との接触面
が前記図１のステー１のような段差を持つ代わりに両端
部の突起部７から中央部にかけてなだらかに変化する連
続壁面１１を形成したものである。この構成により、前
記図１の加熱装置で発生することがあったＡ３サイズ通
紙でのフィルムのしわの発生がなくなった。Embodiment 5 FIG. FIG. 7 is a schematic diagram showing a heating device according to Embodiment 5, (a) is a perspective view,
(B) is a partial side view. In this heating device, the contact surface of the stay 1 with the film 2 on the upstream side of the nip portion has a step like the stay 1 in FIG. The wall 11 is formed. With this configuration, the wrinkling of the film in the A3-size paper passing that may have occurred in the heating device of FIG. 1 has been eliminated.
【００４３】実施の形態６．図８は実施の形態６におけ
る加熱装置を示す斜視図であり、本実施の形態は通紙基
準が上記各実施の形態のような中央基準ではなく、端部
基準（図中手前側）となっている。このため、ステー１
は最大通紙幅Ａ３に対してＡ４縦サイズを通紙した際に
非通紙部となる領域（図中奥）と通紙域の一部（図中手
前の端部）においてニップ部上流側面に突状部７を形成
し、フィルム接触面をフィルム回転半径方向外側に膨ら
ませたものである。この構成により、小サイズ紙を通紙
した時にニップ部上流側にできるフィルムのたるみを減
少させ、通紙先端がフィルム２のたるみに当接して抵抗
を受け、しわになるということがなくなる。Embodiment 6 FIG. FIG. 8 is a perspective view showing a heating device according to the sixth embodiment. In the present embodiment, the paper passing reference is not the center reference as in the above-described embodiments but the end reference (the front side in the drawing). ing. For this reason, stay 1
Is located on the upstream side of the nip portion in an area that becomes a non-sheet-passing portion when the A4 vertical size is passed with respect to the maximum sheet-passing width A3 (the inside in the figure) and a part of the sheet-passing area (the front end in the figure) The protrusion 7 is formed, and the film contact surface is expanded outward in the film rotation radial direction. With this configuration, the slack of the film formed on the upstream side of the nip portion when the small-size paper is passed is reduced, and the leading end of the paper passing abuts against the slack of the film 2 and is not wrinkled.
【００４４】実施の形態７．上記の各実施の形態では、
円筒状のフイルム２を用いたものであるが、図９に示す
ように、エンドレス状の耐熱性のフィルム２ａをほぼ三
角形の各頂点に配設されたガイドローラ１２、１３およ
び加熱体３を取付けたステー１に懸回した構成、あるい
は図１０に示すように、送り出し軸１４から送り出した
帯状のフイルム２ｂを加熱体３を取り付けたステー１を
経て巻き取り軸１５で巻き取る構成であっても、ステー
１を上記各実施の形態における構成とすることにより同
様の効果を得ることができる。Embodiment 7 FIG. In each of the above embodiments,
Although a cylindrical film 2 is used, as shown in FIG. 9, an endless heat-resistant film 2a is attached to guide rollers 12, 13 and a heating element 3, which are disposed at each vertex of a substantially triangle. 10, the belt-like film 2b delivered from the delivery shaft 14 is wound on the take-up shaft 15 via the stay 1 to which the heating element 3 is attached. The same effect can be obtained by configuring the stay 1 in the configuration of each of the above embodiments.
【００４５】実施の形態８．図１１は、上記の加熱装置
を適用した本発明の画像形成装置の構成を示す概略図で
ある。図において、３ｌは像担持体としての例えば直径
３０ｍｍの感光ドラムである。この感光ドラム３１は例
えば電荷発生層としてのアルミニウム等の導電性基体層
３１ｂと、その外周面に形成した電荷輸送層としての光
導電層３１ａを基本構成層とするＯＰＣ感光ドラムであ
り、不図示の駆動源によって矢印Ｒ１方向に所定の速度
で回転駆動される。Embodiment 8 FIG. FIG. 11 is a schematic diagram illustrating a configuration of an image forming apparatus of the present invention to which the above-described heating device is applied. In the figure, reference numeral 31 denotes a photosensitive drum having a diameter of, for example, 30 mm as an image carrier. The photosensitive drum 31 is, for example, an OPC photosensitive drum including a conductive base layer 31b such as aluminum as a charge generation layer and a photoconductive layer 31a as a charge transport layer formed on an outer peripheral surface thereof. Is rotated at a predetermined speed in the direction of arrow R1.
【００４６】この感光ドラム３１の周囲には、その回転
方向に沿って順に、感光ドラムの表面電荷を前露光によ
り除電する前露光ランプ３２と、感光ドラムの表面を所
定の電位に均一に接触帯電する帯電部材としての例えば
直径１２ｍｍの帯電ローラ３３と、この帯電ローラ３３
に振動電圧を印加する電源装置３４と、感光ドラム３１
上に画像情報に応じて静電潜像を形成する露光装置３５
と、この静電潜像にトナーを付着させてトナー像として
顕像化する現像装置３６（本実施の形態１では、ネガト
ナーによる反転現像系を用いている）と、感光ドラム３
１上のトナー像を記録材としての転写紙３８に転写する
転写部材としての例えば直径１２ｍｍの転写ローラ３７
と、トナー像転写後の転写紙３８の電荷を除去する除電
器３９と、トナー像転写後の感光ドラム１の表面に付着
している残留トナーを除去し回収するクリーナー４０等
の画像形成手段が配置されている。４１は前記実施の形
態１から実施の形態７のうちのいずれかに記載した加熱
装置を適用した定着装置である。Around the photosensitive drum 31, a pre-exposure lamp 32 for removing the surface charge of the photosensitive drum by pre-exposure in order along the rotation direction, and a contact charging of the surface of the photosensitive drum to a predetermined potential. A charging roller 33 having a diameter of, for example, 12 mm
Power supply 34 for applying an oscillating voltage to the photosensitive drum 31
Exposure device 35 for forming an electrostatic latent image thereon according to image information
A developing device 36 (in the first embodiment, a reversal developing system using a negative toner is used) for attaching toner to the electrostatic latent image to visualize it as a toner image;
A transfer roller 37 having a diameter of, for example, 12 mm as a transfer member for transferring the toner image on the transfer paper 38 onto a transfer paper 38 as a recording material
And an image forming means such as a static eliminator 39 for removing the charge of the transfer paper 38 after the transfer of the toner image, and a cleaner 40 for removing and collecting the residual toner adhering to the surface of the photosensitive drum 1 after the transfer of the toner image. Are located. Reference numeral 41 denotes a fixing device to which the heating device described in any of the first to seventh embodiments is applied.
【００４７】上記帯電ローラ３３と電源装置３４は接触
帯電装置を構成しており、この帯電ローラ３３は、中心
の芯金３３ａと、その外表面に形成した導電ゴム３３ｂ
とにより構成されている。そして、この芯金３３ａの両
端部は不図示の軸受け部材に回転自在に支持されて、感
光ドラム３１と平行に配置され、不図示の押圧部材で感
光ドラム３１に対して一定の押圧力を持って圧接され、
感光ドラム３１の回転に従って従動回転する。また、芯
金３３ａの端部にギア、コロ等の駆動力伝達部材１６
（図３参照）を取り付け、駆動力の伝達を受けて、感光
ドラム３１の回転に対し順方向又は逆方向に回転させる
ことも可能である。The charging roller 33 and the power supply device 34 constitute a contact charging device. The charging roller 33 includes a central core 33a and a conductive rubber 33b formed on the outer surface thereof.
It is composed of Both ends of the core bar 33a are rotatably supported by a bearing member (not shown) and arranged in parallel with the photosensitive drum 31, and have a constant pressing force against the photosensitive drum 31 by a pressing member (not shown). Pressed
The photosensitive drum 31 rotates following the rotation of the photosensitive drum 31. Further, a driving force transmitting member 16 such as a gear or a roller is attached to an end of the core bar 33a.
(See FIG. 3), the photosensitive drum 31 can be rotated in the forward or reverse direction by receiving the driving force.
【００４８】次に、上記のように構成された画像形成装
置による画像形成時の動作を説明する。感光ドラム３１
は、矢印Ｒ１方向に所定の速度で回転駆動する。帯電ロ
ーラ３３には、電源装置３４から例えば、交流電圧（ピ
ーク間電圧Ｖｐｐ＝２．０ＫＶ、周波数４００Ｈｚの正
弦波）に直流電圧（定電圧一６２５Ｖ）を重畳させた振
動電圧が印加され、感光ドラム１の表面は一６００Ｖの
均一電位に帯電される。Next, the operation at the time of image formation by the image forming apparatus configured as described above will be described. Photosensitive drum 31
Is driven to rotate at a predetermined speed in the direction of arrow R1. To the charging roller 33, for example, an oscillating voltage in which a DC voltage (a constant voltage of 625 V) is superimposed on an AC voltage (a peak-to-peak voltage Vpp = 2.0 KV, a sine wave having a frequency of 400 Hz) is applied from the power supply device 34, The surface of the drum 1 is charged to a uniform potential of 1600V.
【００４９】帯電後の感光ドラム３１は、露光手段３５
による目的画像情報の露光（原稿画像のスリット露光、
レーザービーム走査露光等、図示例では原稿画像のスリ
ット露光とする）を受けることで静電潜像が形成され
る。次いで、この静電潜像は現像手段３６により、トナ
ーで顕像化されてトナー像となる。The charged photosensitive drum 31 is exposed to the exposure means 35.
Exposure of the target image information (slit exposure of the original image,
An electrostatic latent image is formed by receiving laser beam scanning exposure or the like (in the illustrated example, slit exposure of a document image). Next, this electrostatic latent image is visualized with toner by the developing means 36 to become a toner image.
【００５０】転写手段３７は、感光ドラム３１に顕像化
されているトナー像を記録紙３８に転写させ、次いで除
電器３９は転写済の記録紙３８を除電し、本発明の定着
手段４１へ搬送して記録紙３８上のトナー像を定着させ
る。The transfer means 37 transfers the toner image visualized on the photosensitive drum 31 to the recording paper 38, and then the charge eliminator 39 removes the charge from the transferred recording paper 38, and goes to the fixing means 41 of the present invention. The sheet is conveyed to fix the toner image on the recording paper 38.
【００５１】一方、転写後の感光ドラム３１は、その表
面に残留付着しているトナーがクリーナ４０によって清
掃除去され、次いで、感光ドラム３１に残留した電荷が
前露光ランプ３２による前露光によって除電され、再び
次の画像形成に備えられる。On the other hand, the toner remaining on the surface of the photosensitive drum 31 after the transfer is cleaned and removed by the cleaner 40, and the charge remaining on the photosensitive drum 31 is removed by pre-exposure by the pre-exposure lamp 32. Again for the next image formation.
【００５２】[0052]
【発明の効果】以上のように、本発明によれば、薄膜フ
ィルムを介して被加熱体を加熱する加熱体と、前記被加
熱体を前記薄膜フィルムを介して前記加熱体に加圧する
加圧体とを有する加熱装置において、前記薄膜フィルム
の支持手段両端部の前記ニップ部上流側面に突状部を形
成し、あるいは一端側通紙領域と他端側非通紙領域の前
記ニップ部上流側面に突状部を形成するように構成した
ので、中央基準あるいは端部基準で通紙しても薄膜フィ
ルムのたるみを減少させ、このたるみに起因して、通紙
すべき被加熱体に生ずる恐れのあったしわの発生を防止
できる効果がある。As described above, according to the present invention, a heating element for heating an object to be heated via a thin film, and a pressurizing method for pressing the object to be heated to the heating element via the thin film. A projecting portion is formed on the upstream side of the nip at both ends of the support means of the thin film, or the upstream side of the nip in a paper passing area on one end and a non-paper passing area on the other end. As a result, the slack of the thin film is reduced even when the paper is passed on the basis of the center or the end, and the slack may occur on the heated object to be passed through due to the slack. This has the effect of preventing the occurrence of wrinkles with wrinkles.
【００５３】薄膜フィルムの支持手段のニップ上流側に
おいて、フィルムガイド面が長手方向中央部から両端部
の突状部までになだらかに変化する連続壁面を形成する
ように構成したので、小サイズの記録体を通紙した際の
しわの発生より確実に防止することができる効果があ
る。On the upstream side of the nip of the means for supporting the thin film, the film guide surface is formed so as to form a continuous wall surface that gradually changes from the center in the longitudinal direction to the protruding portions at both ends. This has the effect of reliably preventing wrinkles from occurring when paper is passed through the body.
【００５４】薄膜フィルムの支持手段のニップ上流側面
に、長手全域にフィルムしごき部を有するように構成し
たので、前記薄膜フィルムにしわの発生をなくすことが
できる効果がある。Since the nip upstream side of the thin film supporting means is provided with a film squeezed portion over the entire longitudinal area, there is an effect that wrinkling can be eliminated in the thin film.
【図１】 本発明の実施の形態１における加熱装置のフ
ィルムをはずした概略図FIG. 1 is a schematic view of a heating device according to Embodiment 1 of the present invention, from which a film is removed.
【図２】 本発明の実施の形態１における加熱装置のフ
ィルム走行形状を示す図FIG. 2 is a view showing a film running shape of the heating device according to the first embodiment of the present invention.
【図３】 本発明の実施の形態２における加熱装置の概
略図FIG. 3 is a schematic diagram of a heating device according to a second embodiment of the present invention.
【図４】 実施の形態２における加熱装置の要部の組立
方を説明する図FIG. 4 is a view for explaining how to assemble a main part of a heating device according to a second embodiment.
【図５】 本発明の実施の形態３における加熱装置の概
略図FIG. 5 is a schematic diagram of a heating device according to a third embodiment of the present invention.
【図６】 本発明の実施の形態４における加熱装置の概
略図FIG. 6 is a schematic diagram of a heating device according to a fourth embodiment of the present invention.
【図７】 本発明の実施の形態５における加熱装置の概
略図FIG. 7 is a schematic diagram of a heating device according to a fifth embodiment of the present invention.
【図８】 本発明の実施の形態６における加熱装置の概
略図FIG. 8 is a schematic diagram of a heating device according to a sixth embodiment of the present invention.
【図９】 フイルムの配設構成の変形例を示す概要図FIG. 9 is a schematic diagram showing a modification of the film arrangement.
【図１０】 フイルムの配設構成の他の変形例を示す概
要図FIG. 10 is a schematic diagram showing another modified example of the film arrangement configuration.
【図１１】 本発明の実施の形態７における画像形成装
置の側面図FIG. 11 is a side view of an image forming apparatus according to a seventh embodiment of the present invention.
【図１２】 従来の加熱装置を示す側面図FIG. 12 is a side view showing a conventional heating device.
【図１３】 従来の加熱装置に適用する加熱体の平面図FIG. 13 is a plan view of a heating element applied to a conventional heating device.
【図１４】 フィルムとステー間の隙間をあらわす概略
図FIG. 14 is a schematic diagram showing a gap between a film and a stay.
【図１５】 小サイズ通紙時のフィルムとステー間の隙
間をあらわす概略図FIG. 15 is a schematic diagram showing a gap between a film and a stay when small-size paper is passed.
【図１６】 小サイズ通紙時のニップ上流部でのフィル
ムたるみをあらわす斜視図FIG. 16 is a perspective view showing a film slack at an upstream portion of a nip when a small-size sheet is passed.
１ ステー（フィルム支持手段） ２ 薄膜フィルム ３ 加熱体 ８ 加圧体 ７、８ 突状部 Ｒ フィルムしごき部 Ｎ１ ニップ部 Ｐ 記録材（被加熱体） DESCRIPTION OF SYMBOLS 1 Stay (film support means) 2 Thin film 3 Heating body 8 Pressing body 7, 8 Protruding part R Film ironing part N1 Nip part P Recording material (heated body)
Claims (7)
る加熱体と、前記加熱体との間に形成したニップ部に導
入された前記被加熱体を前記薄膜フィルムを介して該加
熱体に加圧する加圧体とを有する加熱装置において、前
記加熱体を支持し前記薄膜フィルムをガイドするフイル
ム支持手段を備え、前記フイルム支持手段両端部の前記
ニップ部上流側面に突状部を形成し、通紙を中央基準と
したことをを特徴とする加熱装置。1. A heating element for heating an object to be heated via a thin film, and the object to be heated introduced into a nip formed between the heating element and the heating element are connected to the heating element via the thin film. A heating device having a pressurizing body for pressurizing, comprising a film supporting means for supporting the heating body and guiding the thin film, forming a projecting portion on the upstream side of the nip portion at both ends of the film supporting means, A heating device characterized in that paper passing is set as a center reference.
手段両端部のニップ部上流側面に形成した突状部の長さ
が、片側で加圧体による薄膜フィルムの加圧長さの１０
％以上であることを特徴とする請求項１記載の加熱装
置。2. The center of the film passing means is the central portion, and the length of the protruding portion formed on the upstream side of the nip portion at both ends of the film supporting means is 10% of the pressing length of the thin film by the pressing body on one side.
% Or more.
中央部から両端部の突状部までになだらかに変化する連
続壁面を形成したことを特徴とする請求項１記載の加熱
装置。3. The heating device according to claim 1, wherein a continuous wall surface that smoothly changes from a central portion of an upstream side surface of the nip portion of the film supporting means to a projecting portion at both ends is formed.
る加熱体と、前記加熱体との間に形成したニップ部に導
入された前記被加熱体を薄膜フィルムを介して該加熱体
に加圧する加圧体とを有する加熱装置において、前記フ
イルム支持手段の両端部を除く中央部であって、前記ニ
ップ部を形成する面とは反対の面に突状部を形成したこ
とを特徴とする加熱装置。4. A heating element for heating an object to be heated via a thin film, and the object to be heated introduced into a nip formed between the heating element and the heating element are applied to the heating element via the thin film. A pressurizing body for pressing, wherein a protruding portion is formed in a central portion excluding both end portions of the film supporting means and opposite to a surface forming the nip portion. Heating equipment.
る加熱体と、前記加熱体との間に形成したニップ部に導
入された前記被加熱体を前記薄膜フィルムを介して該加
熱体に加圧する加圧体とを有する加熱装置において、前
記加熱体を支持し前記薄膜フィルムをガイドするフイル
ム支持手段を備え、前記フイルム支持手段の一端側通紙
領域と他端側の非通紙領域との前記ニップ部上流側面に
突状部を形成し、通紙を端部基準としたことを特徴とす
る加熱装置。5. A heating element for heating an object to be heated via a thin film, and the object to be heated introduced into a nip formed between the heating element and the heating element are connected to the heating element via the thin film. A heating device having a pressurizing body for pressurizing, comprising a film supporting means for supporting the heating body and guiding the thin film, and a non-paper passing area on one end side and a non-sheet passing area on the other end side of the film supporting means. A projecting portion is formed on the upstream side surface of the nip portion, and the paper passing is defined as an end portion.
に、長手全域にフィルムしごき部を形成したことを特徴
とする請求項１、請求項４、請求項５のうちのいずれか
１項記載の加熱装置。6. A heating device according to claim 1, wherein a film squeezing portion is formed on the entire length of the upstream side of the nip portion of the film supporting means. apparatus.
送り出された被加熱体を加熱して該被加熱体上に形成さ
れた顕画像を定着する前記請求項１から請求項６のうち
のいずれか１項記載の加熱装置とを備えたことを特徴と
する画像形成装置。7. The image forming apparatus according to claim 1, wherein the object to be heated sent from the image forming means is heated to fix a visible image formed on the object to be heated. An image forming apparatus, comprising: the heating device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06534697A JP3483423B2 (en) | 1997-03-04 | 1997-03-04 | Heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06534697A JP3483423B2 (en) | 1997-03-04 | 1997-03-04 | Heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10247026A true JPH10247026A (en) | 1998-09-14 |
| JP3483423B2 JP3483423B2 (en) | 2004-01-06 |
Family
ID=13284307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06534697A Expired - Fee Related JP3483423B2 (en) | 1997-03-04 | 1997-03-04 | Heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3483423B2 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001185328A (en) * | 1999-12-27 | 2001-07-06 | Canon Inc | Heating device and image forming device |
| JP2004281286A (en) * | 2003-03-18 | 2004-10-07 | Canon Inc | Heating device |
| JP2005010201A (en) * | 2003-06-16 | 2005-01-13 | Canon Inc | Heating device and image forming apparatus |
| US7403737B2 (en) * | 2004-12-21 | 2008-07-22 | Lexmark International, Inc. | Method of preventing media wrinkling |
| US7469120B2 (en) | 2005-09-16 | 2008-12-23 | Canon Kabushiki Kaisha | Image heating apparatus |
| JP2012252061A (en) * | 2011-05-31 | 2012-12-20 | Brother Ind Ltd | Fixing device |
| JP2013200472A (en) * | 2012-03-26 | 2013-10-03 | Fuji Xerox Co Ltd | Fixing unit and image forming device |
| US8559862B2 (en) | 2010-02-22 | 2013-10-15 | Brother Kogyo Kabushiki Kaisha | Image forming device having ventilator for allowing air to flow in space between fusing member and stay |
| US20140186079A1 (en) * | 2012-12-27 | 2014-07-03 | Canon Finetech Inc. | Heating device, fixing device, and image forming apparatus |
| US8903294B2 (en) | 2011-05-31 | 2014-12-02 | Brother Kogyo Kabushiki Kaisha | Fixing device having cover less subject to deformation |
| US8909115B2 (en) | 2011-05-31 | 2014-12-09 | Brother Kogyo Kabushiki Kaisha | Fixing device having members to restrict end faces of tubular member |
| US9069305B2 (en) | 2011-05-31 | 2015-06-30 | Brother Kogyo Kabushiki Kaisha | Fixing device capable of grounding tubular member |
| JP2016035555A (en) * | 2014-08-04 | 2016-03-17 | キヤノン株式会社 | Fixing device |
| CN105573085A (en) * | 2014-10-31 | 2016-05-11 | 柯尼卡美能达株式会社 | Photographic FIXING DEVICE AND IMAGE FORMING APPARATUS |
| JP2021039148A (en) * | 2019-08-30 | 2021-03-11 | 京セラドキュメントソリューションズ株式会社 | Fixing device and image forming apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH063982A (en) * | 1992-06-17 | 1994-01-14 | Canon Inc | Fixing device |
-
1997
- 1997-03-04 JP JP06534697A patent/JP3483423B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH063982A (en) * | 1992-06-17 | 1994-01-14 | Canon Inc | Fixing device |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001185328A (en) * | 1999-12-27 | 2001-07-06 | Canon Inc | Heating device and image forming device |
| JP2004281286A (en) * | 2003-03-18 | 2004-10-07 | Canon Inc | Heating device |
| JP2005010201A (en) * | 2003-06-16 | 2005-01-13 | Canon Inc | Heating device and image forming apparatus |
| US7403737B2 (en) * | 2004-12-21 | 2008-07-22 | Lexmark International, Inc. | Method of preventing media wrinkling |
| US7469120B2 (en) | 2005-09-16 | 2008-12-23 | Canon Kabushiki Kaisha | Image heating apparatus |
| US8559862B2 (en) | 2010-02-22 | 2013-10-15 | Brother Kogyo Kabushiki Kaisha | Image forming device having ventilator for allowing air to flow in space between fusing member and stay |
| US8903294B2 (en) | 2011-05-31 | 2014-12-02 | Brother Kogyo Kabushiki Kaisha | Fixing device having cover less subject to deformation |
| US9069305B2 (en) | 2011-05-31 | 2015-06-30 | Brother Kogyo Kabushiki Kaisha | Fixing device capable of grounding tubular member |
| US9316975B2 (en) | 2011-05-31 | 2016-04-19 | Brother Kogyo Kabushiki Kaisha | Fixing device capable of suppressing contact between tubular member and electric components |
| US9037057B2 (en) | 2011-05-31 | 2015-05-19 | Brother Kogyo Kabushiki Kaisha | Fixing device capable of suppressing contact between tubular member and electric components |
| JP2012252061A (en) * | 2011-05-31 | 2012-12-20 | Brother Ind Ltd | Fixing device |
| US8909115B2 (en) | 2011-05-31 | 2014-12-09 | Brother Kogyo Kabushiki Kaisha | Fixing device having members to restrict end faces of tubular member |
| JP2013200472A (en) * | 2012-03-26 | 2013-10-03 | Fuji Xerox Co Ltd | Fixing unit and image forming device |
| CN103365177A (en) * | 2012-03-26 | 2013-10-23 | 富士施乐株式会社 | Fixing device, image forming apparatus, and fixing method |
| US20140186079A1 (en) * | 2012-12-27 | 2014-07-03 | Canon Finetech Inc. | Heating device, fixing device, and image forming apparatus |
| US9639040B2 (en) * | 2012-12-27 | 2017-05-02 | Canon Finetech Inc. | Fixing device having a support unit supporting a rotation unit fixing a toner image onto a sheet so as to rotate by first and second protrusions |
| JP2016035555A (en) * | 2014-08-04 | 2016-03-17 | キヤノン株式会社 | Fixing device |
| US10303094B2 (en) | 2014-08-04 | 2019-05-28 | Canon Kabushiki Kaisha | Fixing device having a fixing nip formed by an elastic roller and a back-up unit with a cylindrical film and a film guide including a plurality of ribs extending circumferentially along the inner periphery of the film |
| CN105573085A (en) * | 2014-10-31 | 2016-05-11 | 柯尼卡美能达株式会社 | Photographic FIXING DEVICE AND IMAGE FORMING APPARATUS |
| JP2016090683A (en) * | 2014-10-31 | 2016-05-23 | コニカミノルタ株式会社 | Fixing device and image forming apparatus |
| CN105573085B (en) * | 2014-10-31 | 2019-03-08 | 柯尼卡美能达株式会社 | Fixing device and image forming apparatus |
| JP2021039148A (en) * | 2019-08-30 | 2021-03-11 | 京セラドキュメントソリューションズ株式会社 | Fixing device and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3483423B2 (en) | 2004-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3301162B2 (en) | Heating equipment | |
| US8326201B2 (en) | Fixing apparatus with endless belt and curved pressing member | |
| JP3483423B2 (en) | Heating equipment | |
| US20060245801A1 (en) | Image forming apparatus | |
| JPH09197864A (en) | Heating fixing device | |
| JP3478697B2 (en) | Heat fixing device | |
| JP4261714B2 (en) | Fixing device | |
| JP2001183930A (en) | Heating device and image forming device | |
| JPH09179441A (en) | Fixing device | |
| JP2010139984A (en) | Fixing device and image forming apparatus with the same | |
| JPH06337604A (en) | Heating device and image forming device | |
| JPH075784A (en) | Heater and image forming device | |
| JP4564688B2 (en) | Fixing device | |
| JP2002229371A (en) | Fuser release agent management system with driven release agent supply roll | |
| JPH0922772A (en) | Heating device and image forming device | |
| JPH112977A (en) | Fixing device and image forming device | |
| JPH02143274A (en) | Picture forming device | |
| JPH1174061A (en) | Heating device and picture forming device | |
| JP2004234951A (en) | Heating device | |
| JPH10213979A (en) | Fixing device and image forming device | |
| JPH10333464A (en) | Heating device and image forming device | |
| JPH10221987A (en) | Fixing device and image forming device | |
| JP2000181267A (en) | Fixing device | |
| JPH08339131A (en) | Heating device and image forming device | |
| JPH1010892A (en) | Image forming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071017 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081017 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091017 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091017 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101017 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101017 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111017 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111017 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121017 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131017 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |