JPH01244488A - Fixing device for image forming machine or the like - Google Patents
Fixing device for image forming machine or the likeInfo
- Publication number
- JPH01244488A JPH01244488A JP63071058A JP7105888A JPH01244488A JP H01244488 A JPH01244488 A JP H01244488A JP 63071058 A JP63071058 A JP 63071058A JP 7105888 A JP7105888 A JP 7105888A JP H01244488 A JPH01244488 A JP H01244488A
- Authority
- JP
- Japan
- Prior art keywords
- rollers
- roller
- temperature
- fixing device
- surface roughness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003746 surface roughness Effects 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000004945 silicone rubber Substances 0.000 claims description 8
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 10
- 229920002379 silicone rubber Polymers 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は作像機、特に電子写真方式によるフルカラー
作像機であって、自動両面複写機能をもち、手差し機構
を有する両面フルカラー作像機における定着装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an image forming machine, particularly an electrophotographic full color image forming machine, which has an automatic duplex copying function and a manual feeding mechanism. Regarding equipment.
従来の技術
従来のこの種の定着装置を、第１図に示すこの発明の実
施例を参照してその概要な説明する。2. Description of the Related Art A conventional fixing device of this type will be briefly described with reference to an embodiment of the present invention shown in FIG.
この定着装置は、加熱ローラ］と加圧ローラ２とを有し
、両ローラ１，２にはヒータ３が内蔵されているが、加
圧ローラ２のヒータは特に設けなくてもよい。そして加
熱ローラ１の表面材料は、一般に離型性のよいシリコン
ゴムが用いられる。加圧ローラ２の表面材料はそれ以外
にテフロンか用いられたり、Ｉ−（Ｔ Ｖ （高温加硫
）シリコンゴムが用いられたりする。This fixing device has a heating roller] and a pressure roller 2, and both rollers 1 and 2 have a built-in heater 3, but it is not necessary to provide a heater for the pressure roller 2. As the surface material of the heating roller 1, silicone rubber, which has good mold releasability, is generally used. The surface material of the pressure roller 2 may also be Teflon or I-(TV (high temperature vulcanization) silicone rubber).
そして加熱ローラ］の表面温度検出用のサーミスタ４が
配置され、その検知信号は図示しない定着温度制御装置
に与えられ、この定着温度制御装置は、サーミスタ４の
検知信号に基づいて、加熱ローラ１の表面温度を制御し
ている。A thermistor 4 for detecting the surface temperature of the heating roller is provided, and its detection signal is given to a fixing temperature control device (not shown). Controls surface temperature.
また、加熱ローラ１と加圧ローラ２とは、加圧カム５に
よって互に圧接されており、図示しない駆動手段により
それぞれ矢印方向に回転される。Further, the heating roller 1 and the pressure roller 2 are pressed against each other by a pressure cam 5, and are each rotated in the direction of the arrow by a drive means (not shown).
なお加熱ローラ１の表面にシリコーンオイルを塗布する
ためのオイル塗布手段６、定着を終えたコピー紙（図示
せず）を加熱ローラ］−から剥離するための剥離部材７
および排紙ローラ８などが設けられている。It should be noted that an oil application means 6 is used to apply silicone oil to the surface of the heating roller 1, and a peeling member 7 is used to peel off the copy paper (not shown) that has been fixed from the heating roller.
A paper discharge roller 8 and the like are provided.
ところで一般にフルカラーコピーにおいては、モノクロ
コピーよりも光沢の出る画像が好まれ、また○ＨＰフィ
ルム画像として使用できるような透光性すなわち色再現
性の高い画像が望ましいとされている。By the way, in general, in full-color copies, glossy images are preferred over monochrome copies, and images with high translucency, that is, high color reproducibility, so that they can be used as HP film images are desirable.
このようなことからフルカラーコピーに使用されるトナ
ーは、例えば特公昭６２−６１１４７号公報に開示され
、第２図のグラフにＥまたはＦとして示す熱特性をもつ
ものが好まれるが、これらのトナーは分子量が小さくて
、軟化温度ＴＧＥ、Ｆから流出開始温度ＴＵＥ、Ｆまで
のコム域が非常に狭く、そのため１〜ナー凝集力が小さ
いのでオフセットを起し易い。For this reason, toners used for full-color copying are preferably those disclosed in Japanese Patent Publication No. 62-61147 and having thermal characteristics shown as E or F in the graph of FIG. has a small molecular weight and a very narrow comb range from the softening temperature TGE, F to the outflow start temperature TUE, F, and therefore has a small cohesive force, easily causing offset.
発明が解決しようとする課題
そこで前記のような定着装置を使用し、好ましい画像を
うるため、前記のようなトナーを使用して両面フルカラ
ーコピーをえようとすると、加圧ローラの離型性が不充
分なことから最初に定着した画像がオフセントを起し、
これを是正するためその温度を上げると、光沢が出すぎ
てしまうというような問題点があり、また両ローラの表
面粗さが大きいとモノクロ画像の場合には、格別の問題
とされないが、フルカラー画像の場合はへた部が多いこ
とから、表面粗さがそのまま画像に出てくるという問題
点もある。Problem to be Solved by the Invention Therefore, when trying to obtain a double-sided full-color copy using the above-mentioned toner in order to obtain a preferable image using the above-mentioned fixing device, the releasing property of the pressure roller becomes poor. Due to insufficient image quality, the first fixed image may be off-cented.
If the temperature is raised to correct this, there will be problems such as too much gloss.Also, if the surface roughness of both rollers is large, this will not be a particular problem in the case of monochrome images, but in the case of full color images. In the case of images, since there are many uneven parts, there is also the problem that the surface roughness appears as is in the image.
そこでこの発明の目的は、前記のような従来の定着装置
のもつ問題点を解消し、両面フルカラーコピーにおいて
、良質な画像をうるために＋７ｊ’４しいトナーを使用
しても画像のオフセットや、光沢の出すぎというような
ことがなく、またローラの表面粗さか画像に出ることの
ない定着装置を提供するにある。Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional fixing device, and to obtain high-quality images in double-sided full-color copying, even if +7j'4 high quality toner is used, image offset and To provide a fixing device that does not cause excessive gloss and does not cause the surface roughness of the roller to appear on the image.
問題点を解決するための手段
この発明は前記の目的を達成するにつき、加熱、加圧面
ローラ１，２の表面の材料をＲＴＶ（室温加硫）シリコ
ンゴムで形成し、その表面粗さは０．５μｍＲＺ以下て
、加熱ローラの温度を加圧ローラの温度より３０℃以上
高い温度に設定していることを特徴とするものである。Means for Solving the Problems In order to achieve the above-mentioned object, the present invention forms the surface material of the heating and pressing surface rollers 1 and 2 from RTV (room temperature vulcanization) silicone rubber, and has a surface roughness of 0. .5 μmRZ or less, and the temperature of the heating roller is set at a temperature 30° C. or more higher than the temperature of the pressure roller.
作 用
このようなローラ１，２が例えば第１図に示すような定
着装置に設置され、従来におけると同様にして、加熱、
加圧面ローラによりトナー担持体にトナー像を定着させ
ることとなる。Function: The rollers 1 and 2 as described above are installed in a fixing device as shown in FIG.
The toner image is fixed on the toner carrier by the pressure roller.
実施例
第３図に前記のようにして形成された定着装置１０を有
するフルカラー複写機の概略が示されている。この複数
機において、図示しない転写紙が給紙装置から送られて
きて、マイラを用いた搬送ヘルド１１て感光ドラム１２
と転写部を通過することにより、例えばマゼンタ、シア
ン、イエローの順に転写されて、その転写材は除電チャ
ージャ１５で搬送ベルト１１から分離され、定着装置１
０に入って定着される。Embodiment FIG. 3 schematically shows a full-color copying machine having the fixing device 10 formed as described above. In these multiple machines, transfer paper (not shown) is sent from a paper feeder, and transferred to a photosensitive drum 12 by a transport heald 11 using Mylar.
By passing through the transfer section, for example, magenta, cyan, and yellow are transferred in that order, and the transfer material is separated from the conveyor belt 11 by the static elimination charger 15 and transferred to the fixing device 1.
It is set to 0 and fixed.
以下にこのような複写機により、この発明の定着装置の
実施例１，２、比較例］〜３及び従来例１につき行った
実験の内容及び結果につき説明する。この実験は片面コ
ピー時の画像が両面コピー時にどのように変化するかを
検討するためのものである。The contents and results of experiments conducted on Examples 1 and 2, Comparative Examples] to 3, and Conventional Example 1 of the fixing device of the present invention using such a copying machine will be described below. This experiment was conducted to examine how the image during one-sided copying changes during double-sided copying.
そして光沢度（％）は、日本重色工業（株）製の光沢度
言」を、また転写紙は（株）リコー製タイプ−６００を
、また１〜ナーは（株）リコー製カラー５０００用トナ
ーをそれぞれ使用し、このトナーは（株）島津製作所製
フローテスタによって測定したところ、第２図Ｆに示す
ものと同一であることが確かめられた。The glossiness (%) is the Glossiness Word manufactured by Nihon Heavy Industries Co., Ltd., the transfer paper is Type-600 manufactured by Ricoh Co., Ltd., and the glossiness (%) is for Color 5000 manufactured by Ricoh Co., Ltd. When each toner was measured using a flow tester manufactured by Shimadzu Corporation, it was confirmed that the toner was the same as that shown in FIG. 2F.
実施例 １
この実施例においては、加熱ローラ１の表面材料を１
ｍｍの厚さのＲＴ Ｖシリコンゴム（例えば信越化学工
業（株）製、Ｋ Ｅ−１３０ＯＲＴ Ｖ、ＫＥ−１４０
ＯＲＴＶ等）で、加圧ローラ２の表面材料を３晒の厚さ
の同一のシリコンゴムで、その表面粗さはともに０．３
μｍＲＺとなっているものからなる弾性体によって形成
した。そしてこれらのローラ」−２２にヒータ３を入れ
てそれぞれ１４０″Ｃ１］１０℃に温度調節をした。Example 1 In this example, the surface material of the heating roller 1 is
RT V silicone rubber with a thickness of mm (for example, Shin-Etsu Chemical Co., Ltd., KE-130ORTV, KE-140)
ORTV, etc.), the surface material of the pressure roller 2 is made of the same silicone rubber with a thickness of 3 mm, and the surface roughness of both is 0.3.
It was formed from an elastic body made of μmRZ. A heater 3 was placed in each of these rollers 22 to adjust the temperature to 140° C1]10°C.
このような複写機において画像を作成したところ、片面
コピー時の光沢度は４０％であり、その画像を両面コピ
ーしたときは光沢度が４１％であって、光沢度に変化が
なく両面ともに同し画質かえられた。When an image is created using such a copying machine, the gloss level when copied on one side is 40%, and when the image is copied on both sides, the gloss level is 41%, so there is no change in gloss level and the gloss level is the same on both sides. The image quality was changed.
比較例 ］
この比較例〕−では、加熱ローラ１を実施例コと同一に
構成し、加圧ローラ２を注型方式で成形し、表面粗さが
０．３μｍＲＺのｒ−、ＴＶ（低温加硫）シリコンゴム
で形成した。このようなものにつき実施例１と同様に評
価したところ、片方コピー時の光沢度か４０％であった
ものが、両面コピー時には３０％まで低下した。その理
由は一度定着したトナーが、両面コピー時に離型性の悪
い加圧ローラ２に接触して、ホットオフセノ１−された
ものといえる。Comparative Example] In this comparative example, the heating roller 1 was constructed in the same manner as in Example A, and the pressure roller 2 was molded by a casting method. (sulfur) made of silicone rubber. When such a product was evaluated in the same manner as in Example 1, the glossiness was 40% when copying on one side, but decreased to 30% when copying on both sides. The reason for this can be said to be that once the toner has been fixed, it comes into contact with the pressure roller 2, which has poor releasability, during double-sided copying, and is subjected to hot offsetting.
比較例２
実施例１につき、加圧ローラ２の温度を１３０℃に設定
して同様の評価をしたところ、両面コピー時には光沢度
が５０％に上昇した。これは再７容融されて光沢が出た
ためといえる。Comparative Example 2 When the temperature of the pressure roller 2 was set to 130° C. for Example 1 and the same evaluation was performed, the gloss level increased to 50% during double-sided copying. This can be said to be due to the fact that it was remelted and became glossy.
比較例３
実施例１につき、加圧ローラ２の表面粗さを０．８μと
したところ、へた画像部にむらが生じ、光沢度は３５％
まで低下した。Comparative Example 3 Regarding Example 1, when the surface roughness of the pressure roller 2 was set to 0.8μ, unevenness occurred in the flattened image area, and the gloss level was 35%.
It dropped to .
実施例２
実施例１につき、加圧ローラ２にはヒータ後入れないで
加熱することなく評価した。この時の加圧ローラ２の温
度は非回転時に３０℃であったのが、加熱ローラ１とと
もに回転したところ８０℃に上昇したか、両面コピー時
の光沢度には問題が生じなかった。Example 2 Regarding Example 1, the pressure roller 2 was evaluated without being heated without being heated. At this time, the temperature of the pressure roller 2 was 30° C. when it was not rotating, but when it rotated together with the heating roller 1, it rose to 80° C., and there was no problem with the gloss level during double-sided copying.
従来例 １
加熱ローラ１の表面材料は実施例１と同し材料で厚さ４
ｍのものを使用し、加圧ローラ２の表面材料としてはテ
フロンを使用したちのしこつき評価したところ、片面コ
ピー時には格別の問題を生しなかったが、両面コピー時
に加圧ローラ２への巻付きという問題を生じた。Conventional example 1 The surface material of the heating roller 1 is the same material as in Example 1, and the thickness is 4.
When we evaluated the stickiness of the pressure roller 2 using Teflon as the surface material for the pressure roller 2, we found that there were no particular problems when copying on one side, but when copying on both sides the pressure roller 2 This caused the problem of winding.
発明の効果
この発明は前記のよってあって、加熱、加圧面ローラの
表面材料をＲＴ Ｖシリコンゴムて、表面粗さが０，５
μｍＲＺ以下てあり、さらに加熱ローラの温度を加圧ロ
ーラの温度より３０℃以上高い温度としたので、両面フ
ルカラーコピー時にあっても定着画像のオフセノＩ・を
起したり、光沢の変化を生じたりすることなく、また画
像にローラの表面粗さが出るようなことがなくて、両面
にほぼ同等の良品質の画像をうろことができるという効
果かある。Effects of the Invention In accordance with the above, the present invention uses RTV silicone rubber as the surface material of the heating and pressing surface roller, and has a surface roughness of 0.5.
μmRZ or less, and since the temperature of the heating roller was set to be at least 30°C higher than the temperature of the pressure roller, even during double-sided full-color copying, there was no possibility of offsetting of the fixed image or changes in gloss. This has the effect that almost the same high quality images can be printed on both sides without any surface roughness of the roller appearing on the image.
第１図はこの発明の実施例の一部縦断正面図、第２図は
カラートナーの熱特性を示すグラフ、第３図はこの発明
による定着装置が設けられた複写機の１例の概略図であ
る。
１・・加熱ローラ ２ 加圧ローラ３ ヒータ
４ サーミスタ５ ・加圧カムFIG. 1 is a partially longitudinal front view of an embodiment of the present invention, FIG. 2 is a graph showing the thermal characteristics of color toner, and FIG. 3 is a schematic diagram of an example of a copying machine equipped with a fixing device according to the present invention. It is. 1...Heating roller 2 Pressure roller 3 Heater
4 Thermistor 5 ・Pressure cam
Claims (1)
担持体を、互いに圧接する加熱ローラと加圧ローラとで
加圧して、トナー像をトナー担持体に定着させる作像機
等における定着装置において、前記両ローラの表面の材
料をＲＴＶシリコンゴムで形成し、その表面粗さは０．
５μｍＲＺ以下で、加熱ローラの温度を加圧ローラの温
度より３０℃以上高い温度に設定していることを特徴と
する作像機等における定着装置。1. Fixing in an image forming machine, etc., in which a toner carrier carrying toner images of multiple colors on its surface is pressed by a heating roller and a pressure roller that are in pressure contact with each other to fix the toner image on the toner carrier. In the apparatus, the surfaces of both rollers are made of RTV silicone rubber, and the surface roughness is 0.
A fixing device for an image forming machine or the like, characterized in that the temperature of the heating roller is set at a temperature of 30° C. or more higher than the temperature of the pressure roller, and the temperature of the heating roller is 5 μmRZ or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071058A JPH01244488A (en) | 1988-03-25 | 1988-03-25 | Fixing device for image forming machine or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071058A JPH01244488A (en) | 1988-03-25 | 1988-03-25 | Fixing device for image forming machine or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01244488A true JPH01244488A (en) | 1989-09-28 |
Family
ID=13449540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63071058A Pending JPH01244488A (en) | 1988-03-25 | 1988-03-25 | Fixing device for image forming machine or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01244488A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160970A (en) * | 1990-11-29 | 1992-11-03 | Minolta Camera Kabushiki Kaisha | Controllable fixing device for fixing a toner image into a sheet |
| US6014531A (en) * | 1997-11-27 | 2000-01-11 | Oki Data Corporation | Electrophotographic printer and fixing unit controlling apparatus therfor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417033A (en) * | 1977-07-07 | 1979-02-08 | Canon Inc | Fixing roller for zerography |
-
1988
- 1988-03-25 JP JP63071058A patent/JPH01244488A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5417033A (en) * | 1977-07-07 | 1979-02-08 | Canon Inc | Fixing roller for zerography |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160970A (en) * | 1990-11-29 | 1992-11-03 | Minolta Camera Kabushiki Kaisha | Controllable fixing device for fixing a toner image into a sheet |
| US6014531A (en) * | 1997-11-27 | 2000-01-11 | Oki Data Corporation | Electrophotographic printer and fixing unit controlling apparatus therfor |
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