JP3483423B2 - Heating equipment - Google Patents
Heating equipmentInfo
- Publication number
- JP3483423B2 JP3483423B2 JP06534697A JP6534697A JP3483423B2 JP 3483423 B2 JP3483423 B2 JP 3483423B2 JP 06534697 A JP06534697 A JP 06534697A JP 6534697 A JP6534697 A JP 6534697A JP 3483423 B2 JP3483423 B2 JP 3483423B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- heating
- heated
- nip
- heating device
- 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.)
- Expired - Fee Related
Links
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 an object to be heated to the object to be heated, and an image forming apparatus such as a copying machine or a printer to which the heating device is applied 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 body to the heated body. 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 save power 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 fixing method, that is, a heating body that heats a heated body through a thin film (hereinafter referred to as a film), and the heated body is heated through the film. It has been proposed to apply a heating device having a pressurizing body that pressurizes the body as a fixing device.
【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 of a film heating and fixing system having a maximum sheet passing width of A3 size. 101 is a stay, and this stay 101
Is composed of a main body 105 having a U-shaped cross-section that exposes and supports the heating element 103, and a pressure unit 106 that applies pressure to the opposing pressure roller 104 side. Reference numeral 102 denotes a heat-resistant film (hereinafter, abbreviated as film) having a circular cross section which is fitted onto 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。FIG. 13 is a plan view in which a part of the heating element 103 is cut away and not shown. This heating element 103 is an elongated substrate 131 of heat resistance, insulation, and good thermal conductivity whose longitudinal direction is a direction perpendicular to the conveyance direction a of the recording material P such as the film 102 or a heating object such as paper. Thirteen
1. A resistance heating element 132 formed along the length of the substrate at the central portion in the lateral direction of 1 and a heat resistant overcoat layer 13 for protecting the surface of the heating element 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 as a whole, including a temperature detecting element 107 such as a thermistor for detecting the temperature of the heating element provided on the back surface side of the substrate is used as the substrate constituting body. The heating element 103 has a resistance heating element 132 fixedly arranged so as to be exposed downward on the lower surface side of the stay 101 having rigidity and heat resistance in FIG. Examples of the heating element 103 of this type include, for example, JP-A-4-44075 to JP-A-4-4.
There are so-called tensionless types disclosed in JP-A No. 4083, JP-A-4-204980 to JP-A-4-204984, 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 heating element 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. Further, the resistance heating element 132 is, for example, Ag / Pd (silver palladium), Ru.
It is formed by applying an electric resistance material such as O 2 or Ta 2 N in a linear or strip shape having a thickness of about 10 μm and a width of 1 to 3 mm by screen printing or the like.
【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, for example, a screen printing pattern layer of Ag or the like, and an overcoat layer 134.
Is a heat-resistant glass layer having a thickness of, for example, 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 by sandwiching the film 102 between the pressure roller 104 and the heating body 103, and acts as a film outer surface contact drive means for rotating the film 102. . The film driving roller / pressurizing roller 104 is composed of a core metal 104a, an elastic layer 104b made of silicon rubber, etc., and an outermost release layer 104c. The film is driven with a predetermined pressing force by a bearing means and a biasing means (not shown). The heating element 103 is disposed so as to be sandwiched between the heating element 103 and the heating element 103. The pressure roller 104 is rotationally driven by the 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 heating element 103 is heated by heating the resistance heating element 132 over the entire length of the resistance heating element 132 by supplying power to the power supply electrodes 133, 133 at both longitudinal ends of the resistance heating element 132. 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 source 110 for energizing the resistance heating element 132 by the triac 109 is controlled by the phase, frequency control, etc. to heat the body heating power. Is controlled to control the temperature of the heating element 103.
【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, when the temperature detected by the temperature detecting element 107 is lower than a predetermined set temperature, the heating element 103 is heated, and when it is high, the heating element 103 is cooled to control the energization to control the heating element. 103 is adjusted to a constant temperature during fixing. Thus, the temperature of the heating element 103 rises to a predetermined level and the film 102 is rotated by the rotation of the pressure roller 104.
In a state in which the rotational peripheral speed of (1) is stabilized, the recording material P on which the image is to be fixed is provided between the pressure contact nip portion N formed by the heating body 103 and the pressure roller 104 from the transfer portion of the image forming apparatus (not shown). The heat of the heating element 103 is applied to the recording material P through the film 102 by being conveyed and introduced, and the nip portion N of the pressure contact nip is conveyed together with the film 102. The (toner image) T is heated and fixed on the surface of the recording material P. Then, the recording material P passing through the pressure contact nip portion N is separated from the surface of the film 102 and conveyed. In this case, the recording material P is passed on the basis of 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 to the stay 101 with a sufficient circumferential length, the film 102 shown in 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
14A is the end portion of the stay 1 shown in FIG.
Both of the central portions shown in (b) are rotated 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 system, the recording material P (hereinafter referred to as small size paper) having a narrow width with respect to the axial length L of the film 102, for example, 2L / 3. When a recording material having a certain width is continuously passed through the substantially central portion in the axial direction of the film, heat is not taken by the recording material in the non-sheet passing portion. As a result, the temperature of the pressure roller 104 facing the non-sheet passing portion where heat is not absorbed by the recording material is
Since the temperature is higher than that of the paper passing portion where heat is absorbed by the recording material, the outer diameter of the pressure roller 104 becomes 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 becomes higher in the non-sheet passing portion. That is, the film 102 at the nip portion N
The feeding speed of the sheet is higher in the non-sheet passing portion than in the sheet passing portion, and a speed difference occurs, and the film 102 has a twisting force between the sheet passing portion and the sheet non-passing portion. The gap amount between the two is small at the end portion to the gap S 1 as shown in FIG. 15 (a), and is large at the center portion to the gap S 2 as shown in FIG. 15 (b), so that S 2 > S 0> S 1. Because of the relationship, the film 102 is in a slackened state like 102 'immediately before the nip portion N as shown in FIG.
【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 end of the recording material sags the film 102.
However, there is a problem that the recording material P is wrinkled due to variations in the timing of the recording material P entering the nip portion N in the longitudinal direction of the recording material.
【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 in order to solve the above-mentioned conventional problems, and eliminates the slack of the film,
An object of the present invention is to obtain a heating device which can smoothly convey a recording material as an object to be heated. Another object of the present invention is to obtain an image forming apparatus for applying 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】本発明は下記の構成を特
徴とする加熱装置である。 （１）加熱体と、加熱体と接触しつつ移動するフィルム
と、フィルムを介して加熱体と共にニップ部を形成し、
かつフィルムを駆動する加圧ローラと、加熱体を支持し
フィルムをガイドするフィルム支持手段と、を有し、ニ
ップ部で被加熱材を挟持搬送しつつフィルムを介した加
熱体による加熱で被加熱材を加熱する
加熱装置におい
て、前記装置は被加熱材を中央基準で搬送するものであ
り、前記フィルム支持手段はその両端部の前記ニップ部
上流側面に突状部を有することを特徴とする加熱装置。（２）前記突状部の長さが、片側で加圧ローラによるフ
ィルムの加圧長さの１０％以上３０％以下であることを
特徴とする（１）記載の加熱装置。 （３）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に変化する連続壁面を
形成したことを特徴とする（１）記載の加熱装置。 （４）加熱体と、加熱体と接触しつつ移動する円筒状の
フィルムと、フィルムを介して加熱体と共にニップ部を
形成し、かつフィルムを駆動する加圧ローラと、加熱体
を支持しフィルムをガイドするフィルム支持手段と、を
有し、ニップ部で被加熱材を挟持搬送しつつフィルムを
介した加熱体による加熱で被加熱材を加熱する加熱装置
において、 前記装置は被加熱材を中央基準で搬送するも
のであり、前記フィルム支持手段は、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
突状部を有することを特徴とする加熱装置。 （５）加熱体と、加熱体と接触しつつ移動するフィルム
と、フィルムを介して加熱体と共にニップ部を形成し、
かつフィルムを駆動する加圧ローラと、加熱体を支持し
フィルムをガイドするフィルム支持手段と、を有し、ニ
ップ部で被加熱材を挟持搬送しつつフィルムを介した加
熱体による加熱で被加熱材を加熱する加熱装置におい
て、 前記装置は被加熱材を端部基準で搬送するものであ
り、前記フィルム支持手段はその被記録材搬送基準側の
端部及び他端側の非通紙領域の前記ニップ部上流側面に
突状部を有することを特徴とする加熱装置。 （６）前記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ことを特徴とする
（１）、（４）、（５）のうちのいずれか１項記載の加
熱装置。 The present invention has the following features.
It is a heating device to collect. (1) A heating body and a film that moves while being in contact with the heating body
And form a nip part with the heating body through the film,
In addition, it supports the pressure roller that drives the film and the heating element.
A film supporting means for guiding the film,
The material to be heated is nipped and conveyed at the top part,
In a heating device for heating a material to be heated by heating with a heating body , the device conveys the material to be heated with a central reference.
Ri, the film supporting means heating apparatus characterized by having a projecting portion on the nip portion upstream side of the both end portions. (2) The length of the protrusion is one side
10% or more and 30% or less of the pressure length of the film
The heating device according to (1), characterized in that (3) Is it the central part of the upstream side surface of the nip part of the film support means?
To the projecting parts on both ends.
The heating device according to (1), which is formed. (4) The heating element and the cylindrical shape that moves while being in contact with the heating element
Nip part with the film and the heating body through the film
A pressure roller for forming and driving the film, and a heating body
A film supporting means for supporting and guiding the film,
Holds the material to be heated at the nip and transports the film.
Heating device that heats the material to be heated by heating with a heating body
In the above, the device conveys the material to be heated on a central basis.
And the film supporting means is a central part excluding both ends.
On the surface opposite to the surface forming the nip portion.
A heating device having a protrusion. (5) A heating body and a film that moves while being in contact with the heating body
And form a nip part with the heating body through the film,
In addition, it supports the pressure roller that drives the film and the heating element.
A film supporting means for guiding the film,
The material to be heated is nipped and conveyed at the top part,
A heating device that heats the material to be heated by heating with a heating element
In addition, the device conveys the material to be heated on the basis of the end portion.
The film supporting means is provided on the recording material conveyance reference side.
On the upstream side surface of the nip portion in the non-sheet passing area on the end portion and the other end side
A heating device having a protrusion. (6) On the upstream side surface of the nip portion of the film supporting means,
Characterized by forming a film ironing part in the entire area of the hand
Addition according to any one of (1), (4) and (5)
Thermal device.
【００１８】[0018]
【００１９】[0019]
【００２０】[0020]
【００２１】[0021]
【００２２】[0022]
【００２３】[0023]
【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。BEST MODE FOR CARRYING OUT THE INVENTION An 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 1 is a schematic view showing a heating device according to a first embodiment, (a) is a perspective view,
(B) is a side view of a part thereof. In the figure, reference numeral 1 is a stay as a film supporting means, and this stay 1 has a main body 5 having a U-shaped cross section, which exposes and supports a heating body 3.
And a pressurizing portion 6 having a U-shaped cross section, which is assembled to the main body portion 5 and applies pressure to the opposing pressure roller 4 side. Reference numeral 2 is a heat-resistant film having a circular cross section which is fitted onto the stay 1, and the inner peripheral length of the film 2 is larger than the outer peripheral length of the stay 1 including the heating body 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 by the pressure roller 4 through the film 2 in the entire longitudinal direction to form the 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.
A single layer film such as PTFE, PFA or FEP having heat resistance of preferably 50 μm or less and 20 μm or more, or polyimide, polyamide imide, PEEK, PE
PTFE, PF on the outer peripheral surface of S, PPS, etc. films
A composite layer film coated with A, FEP, etc. 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。Since the main body 5 which is a constituent element of the stay 1 supports the heating body and guides the thin film, the projecting portion 7 is formed on the upstream side surface of the nip portion 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-described structure, the running shape of the film 2 is urged outward by the protrusions 7 at the both ends and the center of rotation of the film is at the center from the both ends as shown in FIG. It will be in a dented state. 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 end portions of the pressure roll 4 corresponding to the non-sheet passing portion is expanded by heating as described above. Then, the film is conveyed fast at both ends of the pressure roller 4 and late at the center. For this reason, the film in the longitudinal center part bulges outward in the film rotation radius direction (indicated by a broken line in the figure), but since it is arranged in a recessed state in advance, the bulge as shown in FIG. 16 occurs. do not do. Therefore, the central portion of the leading edge of the paper does not come into contact with the film that bulges outward in the radial direction of the film rotation when entering the nip, so that wrinkles do not occur 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 wrinkle occurrence frequency was measured by changing the length T of the protruding portion 7 provided on the outside of the main body portion 5 in the radial direction of the film rotation. Length T wrinkle occurrence frequency (when A4 longitudinal paper was passed) Paper width W 0% 47% 5% 24% 10% 9% 15% 5% 20% 3% 25% 7% 30% 4% 35% 11% 40% 16% 45% 43% 50% 38% or more I got good results.
【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 the A4 vertical size is passed with respect to the sheet passing width A3, the length T of the non-sheet passing portion is between 10 and 15% with respect to the sheet passing width A3.
Matches the length at which the effect begins to appear. This is considered to be 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。Further, at 10% of the length T, the protrusion 7
The wrinkle occurrence frequency was measured by changing the protrusion height S of the wrinkle height S (mm) Wrinkle occurrence frequency (when passing A4 longitudinal paper) 0.00 47% 0.25 51% 0.50 27% 1.00 The results were 6% 1.50 3% 2.00 4%. From this result, it can be seen that as the height S is increased, the occurrence 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. 3 is a schematic view showing a heating device according to the second embodiment, (a) is a plan view,
(B) is a side view of a part thereof. In the second embodiment,
A projecting portion 8 is formed on a surface of the stay 1 as a film supporting means excluding both ends thereof, which is opposite to the surface forming the nip portion.
【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 component parts of the stay 1 excluding the film 2. Reference numeral 5 is a main body portion, 6 is a pressing portion having a protrusion 8 formed on the upper surface of the central portion, and 9 and 9 are pressing members. The end bodies 10, 10 and 10 attached to the ends of the pressure portion 6 are pressurizing force applying portions that are assembled to the pressure portion 6 on the outside of the end bodies 9 and 9 to press the pressure portion.
【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 due to the protruding portion 8 is J as shown in FIG.
By making it longer than both ends in the direction, the length in the K direction of the central part becomes shorter than both ends. Therefore, as shown in FIG. 2, the film on the upstream side of the nip has a shape in which the central portion is dented in the film rotation center direction from both end portions.
【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。Therefore, even if a small size paper is passed and the center speed becomes slower than both ends of the film, and the slack occurs in the center part of the film, the slack of the film running shape shown by the solid line in FIG. As a result, the leading edge of the paper does not receive resistance when entering the nip portion, is smoothly conveyed, and wrinkles are less likely to occur.
【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。When the wrinkle occurrence frequency was measured while changing the height difference h between the central portion and both end portions in the longitudinal direction, the height difference h (mm) wrinkle occurrence frequency (%) -1.0 73 -0.5 540 When the height of the central portion was higher than that of both end portions, that is, wrinkle occurrence frequency was 0.063 0.5 21 21 1.0 7 1.5 9 2.0 4.
【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 view showing a heating device according to the third embodiment, (a) is a perspective view,
(B) is a partial side view. In the third embodiment, a film ironing portion R is further provided on the upstream side of the nip portion at the central portion in the longitudinal direction in the main body portion 5 shown in FIG. 1, and the film sliding surface of the film ironing portion R is The height H is the same as that of the projecting portions 7 which are the film guide surfaces at both ends, and the ironing portion R and the projecting portions 7 at both ends serve to squeeze the film over the entire 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 apparatus shown in FIG. 1, when the maximum sheet passing width A3 was passed, the film 2 was sometimes wrinkled due to the stepped portion of the protrusion 7 formed on the upstream side surface of the nip portion of the main body 5. However, in the third embodiment, since the film squeezing portion R is formed over the entire length on the upstream side surface of the nip portion of the film supporting means, the film 2 is prevented from wrinkling 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 the ironing portion is in contact with the film 2 and has an ironing structure.
【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。Fourth Embodiment FIG. 6 is a perspective view showing a heating device according to the fourth embodiment, in which projecting parts 7 are formed at both ends of the upstream side surface of the nip part of the main body part 5, and a film squeezing part R is formed in the central part, and the pressing body 5 is also provided. When the wrinkle occurrence frequency was measured by forming the protruding portion 8 on the upper surface of the central portion of the and the height difference h between the both end surfaces of the pressing body 5 and the protruding portion 8 was measured, the height difference h (mm) Wrinkle occurrence frequency (%) No member 80 6 −1.0 9 −0.5 2 0.0 3 0.5 0 1.0 1.00 1.50 2.00 And the wrinkle occurrence frequency of the film 2 due to the protrusion 8 Has dropped.
【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. 7 is a schematic view showing a heating device in the fifth embodiment, (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 that of the stay 1 of FIG. 1, but changes gently from the protrusions 7 at both ends to the center. The wall surface 11 is formed. With this configuration, the wrinkles of the film in the A3 size paper passing that may occur in the heating device of FIG. 1 are 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。Sixth Embodiment FIG. 8 is a perspective view showing a heating device according to the sixth embodiment. In the present embodiment, the sheet passing reference is not the center reference as in the above-described embodiments but the end reference (the front side in the drawing). ing. Therefore, stay 1
Is on the upstream side surface of the nip portion in the area (the back in the figure) that becomes the non-sheet-passing area when the A4 portrait size is passed with respect to the maximum sheet-passing width A3 and in a part of the paper-passing area (the front end in the figure). The protrusion 7 is formed and the film contact surface is bulged outward in the radial direction of film rotation. 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 is prevented from coming into contact with the slack of the film 2 and receiving a resistance to cause wrinkles.
【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. In each of the above embodiments,
Although the cylindrical film 2 is used, as shown in FIG. 9, the endless heat-resistant film 2a is attached to the guide rollers 12 and 13 and the heating element 3 which are arranged at each vertex of a substantially triangular shape. Even if the structure is suspended around the stay 1, or as shown in FIG. The same effect can be obtained by configuring the stay 1 in the above-described respective 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. 11 is a schematic diagram showing the configuration of the image forming apparatus of the present invention to which the above heating device is applied. In the figure, 3l is a photosensitive drum having a diameter of 30 mm as an image bearing member. The photosensitive drum 31 is an OPC photosensitive drum having 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 the outer peripheral surface thereof as basic constituent layers, and is not shown. Is driven to rotate in the direction of arrow R1 at a predetermined speed.
【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 eliminating the surface charge of the photosensitive drum by pre-exposure in order along the rotation direction thereof, and the surface of the photosensitive drum are uniformly contact-charged to a predetermined potential. And a charging roller 33 having a diameter of 12 mm as a charging member, and the charging roller 33.
Power supply device 34 for applying an oscillating voltage to the photosensitive drum 31
An exposure device 35 that forms an electrostatic latent image on the top according to image information
A developing device 36 that develops a toner image by adhering toner to this electrostatic latent image (in the first embodiment, a reversal developing system using negative toner is used), and the photosensitive drum 3
For example, a transfer roller 37 having a diameter of 12 mm as a transfer member that transfers the toner image on the sheet 1 onto a transfer paper 38 as a recording material.
A static eliminator 39 for removing the electric charge of the transfer paper 38 after the toner image transfer, and an image forming means such as a cleaner 40 for removing and collecting the residual toner adhering to the surface of the photosensitive drum 1 after the toner image transfer. It is arranged. 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, and the charging roller 33 includes a central core metal 33a and a conductive rubber 33b formed on the outer surface thereof.
It is composed of and. Both ends of the cored bar 33a are rotatably supported by a bearing member (not shown) and arranged in parallel with the photosensitive drum 31, and a constant pressing force is applied to the photosensitive drum 31 by a pressing member (not shown). Pressed against each other,
The photosensitive drum 31 is driven to rotate as it rotates. Further, the driving force transmission member 16 such as a gear or roller is attached to the end of the core metal 33a.
It is also possible to attach (see FIG. 3) and receive the driving force to rotate the photosensitive drum 31 in the forward or reverse direction with respect to the rotation.
【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 rotationally driven in the direction of arrow R1 at a predetermined speed. An oscillating voltage obtained by superimposing a DC voltage (constant voltage: 625V) on an AC voltage (peak voltage Vpp = 2.0KV, sine wave having a frequency of 400Hz) is applied to the charging roller 33 from the power supply device 34, for example. 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 photosensitive drum 31 after charging is exposed by the exposing means 35.
Exposure of target image information by (slit exposure of original image,
An electrostatic latent image is formed by receiving a slit exposure of a document image in the illustrated example such as laser beam scanning exposure. Next, this electrostatic latent image is visualized with toner by the developing means 36 to form 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 static eliminator 39 discharges the transferred recording paper 38 to the fixing means 41 of the present invention. The toner image on the recording paper 38 is conveyed and fixed.
【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ー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, after the transfer, the toner remaining on the surface of the photosensitive drum 31 is cleaned and removed by the cleaner 40, and the electric charges remaining on the photosensitive drum 31 are removed by the pre-exposure by the pre-exposure lamp 32. Again, it is ready 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 body for heating an object to be heated through a thin film, and a pressurization for pressurizing the heating object to the heating body through the thin film. In a heating device having a body, a projecting portion is formed on the upstream side surface of the nip portion at both ends of the supporting means for the thin film, or the upstream side surface of the nip portion at one end side sheet passing region and the other end side non-sheet passing region. Since it is configured to form a protruding portion on the center of the sheet, the slack of the thin film is reduced even when the paper is passed through the center or the end, and this slack may cause the heated object to be passed. It is effective in preventing the occurrence of 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 supporting means for the thin film, the film guide surface is formed so as to form a continuous wall surface that gently changes from the central portion in the longitudinal direction to the projecting portions at both ends. There is an effect that it is possible to surely prevent the generation of wrinkles when the body passes the paper.
【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 film squeezing portion is provided over the entire length on the upstream side surface of the nip of the supporting means for the thin film, it is possible to eliminate the occurrence of wrinkles 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 a first embodiment of the present invention with a film 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 diagram showing a film traveling 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 diagram for explaining how to assemble the essential parts of the heating device according to the 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 view showing a modified example of the film arrangement configuration.
【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 view 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 body 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 view 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 view showing a gap between a film and a stay when passing a small size sheet.
【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 film slack in the upstream portion of the nip when a small-sized 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） 1 stay (film support means) 2 thin film 3 heating body 8 Pressurized body 7,8 Projections R film ironing unit N1 Nip part P Recording material (heated object)
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 15/20 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G03G 15/20
Claims (6)
フィルムと、フィルムを介して加熱体と共にニップ部を
形成し、かつフィルムを駆動する加圧ローラと、加熱体
を支持しフィルムをガイドするフィルム支持手段と、を
有し、ニップ部で被加熱材を挟持搬送しつつフィルムを
介した加熱体による加熱で被加熱材を加熱する加熱装置
において、前記装置は被加熱材を中央基準で搬送するものであり、
前記フィルム支持手段はその両端部の前記ニップ部上流
側面に突状部を有することを特徴とする加熱装置。1. A heating body and a moving body in contact with the heating body.
Nip part with the film and the heating body through the film
A pressure roller for forming and driving the film, and a heating body
A film supporting means for supporting and guiding the film,
Holds the material to be heated at the nip and transports the film.
In a heating device for heating a material to be heated by heating through a heating body , the device conveys the material to be heated with a central reference,
The film supporting means heating apparatus characterized by having a projecting portion on the nip portion upstream side of the both end portions.
によるフィルムの加圧長さの１０％以上３０％以下であ
ることを特徴とする請求項１記載の加熱装置。2. A method according to claim length of the projecting portion, characterized in that one at 30% or less than 10% of the pressurized圧長of by that full Irumu the pressure roller <br/> 1 The heating device described.
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 changes gently from the central portion of the upstream side surface of the nip portion of the film supporting means to the projecting portions at both ends is formed.
円筒状のフィルムと、フィルムを介して加熱体と共にニ
ップ部を形成し、かつフィルムを駆動する加圧ローラ
と、加熱体を支持しフィルムをガイドするフィルム支持
手段と、を有し、ニップ部で被加熱材を挟持搬送しつつ
フィルムを介した加熱体による加熱で被加熱材を加熱す
る加熱装置において、前記装置は被加熱材を中央基準で搬送するものであり、
前記フィルム支持手段は、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
有することを特徴とする加熱装置。4. The heating body and the heating body move while being in contact with the heating body.
The cylindrical film and the heater together with the film
A pressure roller that forms the looped portion and drives the film
And film support that supports the heating element and guides the film
And means for nipping and transporting the material to be heated at the nip portion.
The material to be heated is heated by heating with the heating element through the film.
In the heating device described above, the device conveys the material to be heated with a central reference,
The film supporting means is a central portion excluding both end portions, and a projecting portion is formed on a surface opposite to a surface forming the nip portion.
A heating device having.
フィルムと、フィルムを介して加熱体と共にニップ部を
形成し、かつフィルムを駆動する加圧ローラと、加熱体
を支持しフィルムをガイドするフィルム支持手段と、を
有し、ニップ部で被加熱材を挟持搬送しつつフィルムを
介した加熱体による加熱で被加熱材を加熱する加熱装置
において、前記装置は被加熱材を端部基準で搬送するものであり、
前記フィルム支持手段はその被記録材搬送基準側の端部
及び他端側の非通紙領域の前記ニップ部上流側面に突状
部を有することを特徴とする加熱装置。5. The heating element and the heating element move while being in contact with the heating element.
Nip part with the film and the heating body through the film
A pressure roller for forming and driving the film, and a heating body
A film supporting means for supporting and guiding the film,
Holds the material to be heated at the nip and transports the film.
In a heating device for heating a material to be heated by heating through a heating body , the device conveys the material to be heated on an end basis,
The film support means has an end portion on the recording material conveyance reference side.
And a protruding shape on the upstream side surface of the nip portion in the non-sheet passing area on the other end side
A heating device having a portion .
面に、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 film squeezing portion is formed over the entire length on the upstream side surface of the nip portion of the film supporting means, as claimed in any one of claims 1, 4 and 5. Heating device.
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 JPH10247026A (en) | 1998-09-14 |
| JP3483423B2 true 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) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4261714B2 (en) * | 1999-12-27 | 2009-04-30 | キヤノン株式会社 | Fixing device |
| JP2004281286A (en) * | 2003-03-18 | 2004-10-07 | Canon Inc | Heating device |
| JP4235493B2 (en) * | 2003-06-16 | 2009-03-11 | キヤノン株式会社 | Fixing device |
| US7403737B2 (en) * | 2004-12-21 | 2008-07-22 | Lexmark International, Inc. | Method of preventing media wrinkling |
| JP2007079507A (en) | 2005-09-16 | 2007-03-29 | Canon Inc | Heating device and image forming apparatus |
| JP5035364B2 (en) | 2010-02-22 | 2012-09-26 | ブラザー工業株式会社 | Image forming apparatus |
| JP5884300B2 (en) | 2011-05-31 | 2016-03-15 | ブラザー工業株式会社 | Fixing device |
| JP5786461B2 (en) | 2011-05-31 | 2015-09-30 | ブラザー工業株式会社 | Fixing device |
| JP5821292B2 (en) | 2011-05-31 | 2015-11-24 | ブラザー工業株式会社 | Fixing device |
| JP5884299B2 (en) | 2011-05-31 | 2016-03-15 | ブラザー工業株式会社 | Fixing device |
| JP5910225B2 (en) * | 2012-03-26 | 2016-04-27 | 富士ゼロックス株式会社 | Fixing device and image forming apparatus |
| JP5940510B2 (en) * | 2012-12-27 | 2016-06-29 | キヤノンファインテック株式会社 | Fixing apparatus and image forming apparatus |
| JP6594043B2 (en) * | 2014-08-04 | 2019-10-23 | キヤノン株式会社 | Fixing device |
| JP6137119B2 (en) * | 2014-10-31 | 2017-05-31 | コニカミノルタ株式会社 | Fixing apparatus and image forming apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3155066B2 (en) * | 1992-06-17 | 2001-04-09 | キヤノン株式会社 | Fixing device |
-
1997
- 1997-03-04 JP JP06534697A patent/JP3483423B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10247026A (en) | 1998-09-14 |
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