JP2002365958A - Fixing machine - Google Patents
Fixing machineInfo
- Publication number
- JP2002365958A JP2002365958A JP2001178350A JP2001178350A JP2002365958A JP 2002365958 A JP2002365958 A JP 2002365958A JP 2001178350 A JP2001178350 A JP 2001178350A JP 2001178350 A JP2001178350 A JP 2001178350A JP 2002365958 A JP2002365958 A JP 2002365958A
- Authority
- JP
- Japan
- Prior art keywords
- fixing
- roller
- sheet member
- unit
- heat
- 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.)
- Withdrawn
Links
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子写真方式や静
電記録方式等を採用する画像形成装置に用いられる定着
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 fixing device used in an image forming apparatus employing an electrophotographic system, an electrostatic recording system, or the like.
【０００２】[0002]
【従来の技術】図６に従来の定着装置の構成を示す。2. Description of the Related Art FIG. 6 shows the structure of a conventional fixing device.
【０００３】図６において、１５は用紙上の画像を定着
させるための加圧ローラ、１６は加圧ローラ１５に圧接
された定着ローラであり、定着ローラ１６の内部には加
熱ヒータ１７が設けられている。１８は定着ローラ１６
の外周面に圧接された外部加熱ローラであり、その内部
には第２の加熱手段１９が設けられ、外部加熱ローラ１
８は定着ローラ１６の回転に対して従動回転しながら定
着ローラ１６表面に所定の熱を加える。この外部加熱に
よって高速コピーでの画像定着性能を高めている。In FIG. 6, reference numeral 15 denotes a pressure roller for fixing an image on a sheet, 16 denotes a fixing roller pressed against the pressure roller 15, and a heater 17 is provided inside the fixing roller 16. ing. 18 is a fixing roller 16
An external heating roller is pressed against the outer peripheral surface of the external heating roller 1, and a second heating means 19 is provided inside the external heating roller.
8 applies predetermined heat to the surface of the fixing roller 16 while rotating following the rotation of the fixing roller 16. This external heating enhances image fixing performance in high-speed copying.
【０００４】又、上記加圧ローラ１５と外部加熱ローラ
１９には、未定着トナーによる汚れを防止するために、
巻き取り式のクリーニングシート部材２０，２１がそれ
ぞれ圧接されており、これらのクリーニングシート部材
２０，２１はローラ１５，１９の表面上で搬送される。In order to prevent contamination by unfixed toner, the pressure roller 15 and the external heating roller 19 are
The take-up cleaning sheet members 20 and 21 are pressed against each other, and these cleaning sheet members 20 and 21 are conveyed on the surfaces of the rollers 15 and 19.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
構成では、外部加熱ローラ１８と定着ローラ１６の両方
に巻き取り式クリーニングシート２０，２１を設けなけ
ればならなかったため、。これらのクリーニングシート
２０，２１を配置するための広いスペースを確保しなけ
ればならず、クリーニングシート２０，２１の部品コス
トが高くなるという問題があった。However, in the conventional configuration, the winding type cleaning sheets 20 and 21 must be provided on both the external heating roller 18 and the fixing roller 16. A large space for arranging these cleaning sheets 20 and 21 has to be secured, and there has been a problem that the parts cost of the cleaning sheets 20 and 21 increases.
【０００６】又、外部加熱手段については、円柱状の外
部加熱ローラ１８と内部の発熱ヒータ１９との間に或る
程度の空間が生じるため、画像定着に十分な熱量を得る
ためには高い電力が必要であった。Further, as for the external heating means, since a certain space is generated between the cylindrical external heating roller 18 and the internal heating heater 19, a high electric power is required to obtain a sufficient amount of heat for image fixing. Was needed.
【０００７】本発明は上記問題に鑑みてなされたもの
で、その目的とする処は、消費電力の低減と省スペース
化及び部品コストの削減を図ることができる定着装置を
提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a fixing device capable of reducing power consumption, saving space, and reducing component costs.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、記録材上の未定着画像を加熱定着する加
熱定着手段と、該加熱定着手段の外周に接触配置されて
加熱定着手段を外部から加熱する外部定着手段とを備え
た定着装置において、前記外部加熱手段を熱伝達手段と
して搬送されるシート部材と該シート部材を挟んで加熱
定着手段の外周に当接するヒータ部材とで構成し、前記
シート部材が加熱定着手段のクリーニング手段を兼ねる
ようにした。In order to achieve the above object, the present invention provides a heat fixing means for heating and fixing an unfixed image on a recording material, and a heat fixing means arranged in contact with the outer periphery of the heat fixing means. A fixing device provided with an external fixing means for externally heating the fixing member, comprising a sheet member conveyed by using the external heating means as a heat transfer means, and a heater member contacting the outer periphery of the heat fixing means with the sheet member interposed therebetween. The sheet member also serves as a cleaning unit for the heating and fixing unit.
【０００９】[0009]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１０】＜実施の形態１＞図１は本発明の実施の形
態１に係る定着装置の断面図であり、同図において、１
はその内部に加熱部材２を有する定着ローラ、３は定着
ローラ１に圧接された加圧ローラであり、画像形成時に
２つのローラ１，３は矢印Ａ方向に回転する。トナー像
を転写させた用紙Ｓは、矢印Ｂ方向に搬送され、定着ロ
ーラ１と加圧ローラ３のニップ部を通過することによっ
て画像定着される。又、４は定着ローラ１の外周面を外
部から加熱する外部加熱部材であり、この外部加熱部材
４は矢印Ｃ方向に搬送される熱伝達手段としてのシート
部材５を挟んで定着ローラ１に圧接されている。<First Embodiment> FIG. 1 is a sectional view of a fixing device according to a first embodiment of the present invention.
Is a fixing roller having a heating member 2 therein, and 3 is a pressing roller pressed against the fixing roller 1, and the two rollers 1 and 3 rotate in the direction of arrow A during image formation. The sheet S onto which the toner image has been transferred is conveyed in the direction of arrow B, and the image is fixed by passing through the nip portion between the fixing roller 1 and the pressure roller 3. Reference numeral 4 denotes an external heating member for heating the outer peripheral surface of the fixing roller 1 from outside. The external heating member 4 is pressed against the fixing roller 1 with a sheet member 5 as a heat transfer means conveyed in the direction of arrow C interposed therebetween. Have been.
【００１１】シート部材５は巻き取り式になっており、
使用前シートが巻いてあるロール６はオイル７に使用し
ており、シート部材５には所定量のオイルが染み込む構
成となっている。The sheet member 5 is of a winding type,
The roll 6 around which the sheet before use is wound is used for the oil 7, and a predetermined amount of oil permeates the sheet member 5.
【００１２】従って、シート部材５に染み込んだオイル
は、該シート部材５が外部加熱部材４付近に達した際に
熱伝達効率を上げるとともに、画像に光沢性を持たせる
ために必要な定着ローラ１へのオイル塗布を行ってい
る。Therefore, the oil permeated into the sheet member 5 increases the heat transfer efficiency when the sheet member 5 reaches the vicinity of the external heating member 4 and at the same time, the fixing roller 1 necessary to impart gloss to the image. Oil is being applied to
【００１３】ここで、シート部材５は、ポリイミド、ポ
リエステル、ガラス繊維等の合成繊維で構成されてお
り、その厚さは０．３ｍｍ以下である。そして、外部加
熱ヒータ４の下を搬送されるシート部材５は、定着ロー
ラ１の外周面をクリーニングする手段としても機能して
いる。Here, the sheet member 5 is made of a synthetic fiber such as polyimide, polyester, glass fiber or the like, and has a thickness of 0.3 mm or less. The sheet member 5 conveyed under the external heater 4 also functions as a unit for cleaning the outer peripheral surface of the fixing roller 1.
【００１４】以上の構成を採用することによって、外部
加熱部材４を極めて定着ローラ１表面に設置することが
できるため、定着ローラ１表面と加熱効率が従来のもの
よりも高められる。By employing the above configuration, the external heating member 4 can be extremely disposed on the surface of the fixing roller 1, so that the surface of the fixing roller 1 and the heating efficiency can be increased as compared with the conventional one.
【００１５】又、シート部材５が定着ローラ１のクリー
ニング手段及びオイル塗布手段を兼ねることにより省ス
ペース化と部品コストの低減が図られる。又、外部加熱
部材４の形状を図２に示すように定着ローラ１の外周面
に沿った湾曲形状とし、定着ローラ１とのニップ幅を広
くとって熱伝達効率を上げるとともに、外部加熱部材４
の凸部４−ａ，４−ｂ上をシート部材５を搬送させるこ
とによって、シート部材５をしごいて染み込んだオイル
をニップ部で染み出せる効果を得ることもできる。Further, since the sheet member 5 also serves as a cleaning means for the fixing roller 1 and an oil applying means, the space can be saved and the cost of parts can be reduced. The shape of the external heating member 4 is curved along the outer peripheral surface of the fixing roller 1 as shown in FIG. 2 to increase the nip width with the fixing roller 1 to increase the heat transfer efficiency.
By transporting the sheet member 5 on the convex portions 4-a and 4-b of the above, an effect of squeezing the sheet member 5 and permeating the oil at the nip portion can also be obtained.
【００１６】又、図３に示すように、外部加熱部材８の
ようにローラ形状としてシート部材５の搬送に従動回転
させることによってシート部材５の搬送抵抗を小さく抑
え、シート搬送性を安定させても良い。As shown in FIG. 3, when the sheet member 5 is driven and rotated in the form of a roller as in the case of the external heating member 8, the conveyance resistance of the sheet member 5 is reduced, and the sheet conveyance performance is stabilized. Is also good.
【００１７】＜実施の形態２＞図４に本発明の実施の形
態２に係る定着装置を示す。Second Embodiment FIG. 4 shows a fixing device according to a second embodiment of the present invention.
【００１８】本実施の形態では、図４に示すように、外
部加熱部材４の熱伝達手段としてのシート部材をエンド
レスシート１１とし、所定のテンションを掛けた搬送ロ
ーラ９，１０によってエンドレスシート１１を搬送する
構成を採用している。In this embodiment, as shown in FIG. 4, an endless sheet 11 is used as a sheet member as a heat transfer means of the external heating member 4, and the endless sheet 11 is conveyed by conveying rollers 9 and 10 with a predetermined tension. It adopts a configuration to transport.
【００１９】又、シート部材を巻き取り式からエンドレ
スシート１１にするために、シート搬送路中にクリーニ
ングローラ１２を設け、これを回転させてエンドレスシ
ート１１上の汚れをクリーニングしている。Further, in order to change the sheet member from the winding type to the endless sheet 11, a cleaning roller 12 is provided in the sheet conveying path, and the cleaning roller 12 is rotated to clean the endless sheet 11.
【００２０】以上の構成により、実施の形態１と同様な
効果を得るとともに、エンドレスシート１１のコストダ
ウンを図ることができる。その他の構成は実施の形態１
のそれと同じである。With the above configuration, the same effect as that of the first embodiment can be obtained, and the cost of the endless seat 11 can be reduced. Other configurations are described in Embodiment 1.
It is the same as that of
【００２１】＜実施の形態３＞図５に本発明の実施の形
態３に係る定着装置を示す。<Third Embodiment> FIG. 5 shows a fixing device according to a third embodiment of the present invention.
【００２２】本実施の形態では、実施の形態１と同様に
シート部材５を巻き取り式としている。但し、シート搬
送用のローラ１３を追加して定着ローラ１へのオイル塗
布ローラ１４と外部加熱手段４を別々に配置している。
この構成により、オイル塗布と外部加熱においてそれぞ
れに最適な加圧条件を設定することができ、定着ローラ
１のオイル塗布と外部加熱条件をそれぞれ最適化するこ
とができる。その他の構成及び効果は実施の形態１のそ
れと同じである。In this embodiment, as in the first embodiment, the sheet member 5 is of a winding type. However, the roller 13 for applying the oil to the fixing roller 1 and the external heating means 4 are separately arranged by adding a roller 13 for conveying the sheet.
With this configuration, the optimal pressing conditions can be set for oil application and external heating, respectively, and the oil application and external heating conditions for the fixing roller 1 can be optimized. Other configurations and effects are the same as those of the first embodiment.
【００２３】[0023]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、記録材上の未定着画像を加熱定着する加熱定着
手段と、該加熱定着手段の外周に接触配置されて加熱定
着手段を外部から加熱する外部定着手段とを備えた定着
装置において、前記外部加熱手段を熱伝達手段として搬
送されるシート部材と該シート部材を挟んで加熱定着手
段の外周に当接するヒータ部材とで構成し、前記シート
部材が加熱定着手段のクリーニング手段を兼ねるように
したため、消費電力の低減と省スペース化及び部品コス
トの削減を図ることができるという効果が得られる。As is apparent from the above description, according to the present invention, a heat fixing means for heating and fixing an unfixed image on a recording material, and a heat fixing means disposed in contact with the outer periphery of the heat fixing means. A fixing device provided with an external fixing means for externally heating the fixing member, comprising a sheet member conveyed by using the external heating means as a heat transfer means, and a heater member contacting the outer periphery of the heat fixing means with the sheet member interposed therebetween. In addition, since the sheet member also serves as a cleaning unit for the heating and fixing unit, it is possible to reduce power consumption, save space, and reduce parts costs.
【図１】本発明の実施の形態１に係る定着装置の断面図
である。FIG. 1 is a sectional view of a fixing device according to a first embodiment of the present invention.
【図２】本発明の実施の形態１に係る定着装置の外部加
熱部材の構成を示す断面図である。FIG. 2 is a cross-sectional view illustrating a configuration of an external heating member of the fixing device according to the first embodiment of the present invention.
【図３】本発明の実施の形態１に係る定着装置の外部加
熱部材の構成を示す断面図である。FIG. 3 is a cross-sectional view illustrating a configuration of an external heating member of the fixing device according to the first embodiment of the present invention.
【図４】本発明の実施の形態２に係る定着装置の断面図
である。FIG. 4 is a sectional view of a fixing device according to a second embodiment of the present invention.
【図５】本発明の実施の形態３に係る定着装置の断面図
である。FIG. 5 is a sectional view of a fixing device according to a third embodiment of the present invention.
【図６】従来の定着装置の断面図である。FIG. 6 is a sectional view of a conventional fixing device.
１ 定着ローラ ２ 加熱部材 ３ 加圧ローラ ４ 外部加熱部材 ５ シート部材 DESCRIPTION OF SYMBOLS 1 Fixing roller 2 Heating member 3 Pressure roller 4 External heating member 5 Sheet member
Claims (5)
熱定着手段と、該加熱定着手段の外周に接触配置されて
加熱定着手段を外部から加熱する外部定着手段とを備え
た定着装置において、 前記外部加熱手段を熱伝達手段として搬送されるシート
部材と該シート部材を挟んで加熱定着手段の外周に当接
するヒータ部材とで構成し、前記シート部材が加熱定着
手段のクリーニング手段を兼ねるようにしたことを特徴
とする定着装置。1. A fixing device comprising: a heat fixing unit for heating and fixing an unfixed image on a recording material; and an external fixing unit disposed in contact with an outer periphery of the heat fixing unit and heating the heat fixing unit from outside. A sheet member conveyed by the external heating means as a heat transfer means, and a heater member contacting the outer periphery of the heat fixing means with the sheet member interposed therebetween, so that the sheet member also serves as a cleaning means for the heat fixing means. A fixing device characterized in that:
ーニング手段としてのシート部材の搬送路途中に、シー
ト部材にオイルを塗布するオイル塗布手段を設けたこと
を特徴とする請求項１記載の定着装置。2. The fixing device according to claim 1, further comprising an oil application unit that applies oil to the sheet member in a conveying path of the sheet member as a cleaning unit of the heat transfer unit and the heat fixing unit. apparatus.
状が加熱定着手段の外周形状に沿うような湾曲形状であ
ることを特徴とする請求項１記載の定着装置。3. The fixing device according to claim 1, wherein a shape of a contact surface of the heater member to the heat fixing unit has a curved shape along an outer peripheral shape of the heat fixing unit.
されるシート部材に対して従動回転させることを特徴と
する請求項１記載の定着装置。4. The fixing device according to claim 1, wherein the heater member has a roller shape, and the heater member is driven to rotate with respect to a conveyed sheet member.
材のクリーニング手段を設けたことを特徴とする請求項
１記載の定着装置。5. The fixing device according to claim 1, wherein a cleaning unit for the sheet member is provided in the middle of the conveying path of the sheet member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001178350A JP2002365958A (en) | 2001-06-13 | 2001-06-13 | Fixing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001178350A JP2002365958A (en) | 2001-06-13 | 2001-06-13 | Fixing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002365958A true JP2002365958A (en) | 2002-12-20 |
Family
ID=19019063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001178350A Withdrawn JP2002365958A (en) | 2001-06-13 | 2001-06-13 | Fixing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002365958A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006323024A (en) * | 2005-05-17 | 2006-11-30 | Kyocera Mita Corp | Fixing device |
| JP2007078741A (en) * | 2005-09-09 | 2007-03-29 | Sharp Corp | Fixing device and image forming apparatus including same |
| JP2007114705A (en) * | 2005-10-24 | 2007-05-10 | Canon Inc | Image fixing device |
| JP2012032427A (en) * | 2010-07-28 | 2012-02-16 | Canon Inc | Image heating device |
| US8355659B2 (en) | 2009-01-21 | 2013-01-15 | Sharp Kabushiki Kaisha | Fixing device and image forming apparatus having same |
| JP2013033148A (en) * | 2011-08-02 | 2013-02-14 | Ricoh Co Ltd | Fixing device and image forming apparatus comprising the same |
| JP2014077889A (en) * | 2012-10-10 | 2014-05-01 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
-
2001
- 2001-06-13 JP JP2001178350A patent/JP2002365958A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006323024A (en) * | 2005-05-17 | 2006-11-30 | Kyocera Mita Corp | Fixing device |
| JP2007078741A (en) * | 2005-09-09 | 2007-03-29 | Sharp Corp | Fixing device and image forming apparatus including same |
| JP4537298B2 (en) * | 2005-09-09 | 2010-09-01 | シャープ株式会社 | Fixing apparatus and image forming apparatus having the same |
| JP2007114705A (en) * | 2005-10-24 | 2007-05-10 | Canon Inc | Image fixing device |
| US8355659B2 (en) | 2009-01-21 | 2013-01-15 | Sharp Kabushiki Kaisha | Fixing device and image forming apparatus having same |
| JP2012032427A (en) * | 2010-07-28 | 2012-02-16 | Canon Inc | Image heating device |
| JP2013033148A (en) * | 2011-08-02 | 2013-02-14 | Ricoh Co Ltd | Fixing device and image forming apparatus comprising the same |
| JP2014077889A (en) * | 2012-10-10 | 2014-05-01 | Fuji Xerox Co Ltd | Fixing device and image forming apparatus |
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