JPS60256179A - Heat fixing device of electrophotographic copying machine - Google Patents
Heat fixing device of electrophotographic copying machineInfo
- Publication number
- JPS60256179A JPS60256179A JP11234584A JP11234584A JPS60256179A JP S60256179 A JPS60256179 A JP S60256179A JP 11234584 A JP11234584 A JP 11234584A JP 11234584 A JP11234584 A JP 11234584A JP S60256179 A JPS60256179 A JP S60256179A
- Authority
- JP
- Japan
- Prior art keywords
- fixing roller
- roller
- toner
- rubber layer
- fixing 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.)
- Granted
Links
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 17
- 239000004945 silicone rubber Substances 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 229910052736 halogen Inorganic materials 0.000 abstract description 2
- 150000002367 halogens Chemical class 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 5
- 229920001821 foam rubber Polymers 0.000 description 4
- 238000010073 coating (rubber) Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
- G03G15/2025—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
(発明の技術分野)
本発明は、電子複写機特にフルカラーの電子複写機にお
けるカラートナーの熱定着装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a heat fixing device for color toner in an electronic copying machine, particularly a full-color electronic copying machine.
(発明の技術的背景とその問題点)
従来から通常の電子複写機の熱定着装置とじては、芯金
上にシリコーンゴムを被覆し表面を平らに研削してなる
定着ローラを黒色トナーと接する側に配置し、反対側に
表面にフッ素樹脂の被allNを設けた伝熱ローラを配
置した構造のものが使用され、加熱された伝熱ローラか
ら定着ローラに伝導された熱によりトナーを複写紙上に
融着し画像定着を行なっている。(Technical background of the invention and its problems) Conventionally, in the heat fixing device of a typical electronic copying machine, a fixing roller made of a core metal coated with silicone rubber and the surface of which is ground flat is brought into contact with black toner. A heat transfer roller with a fluororesin coating on the surface on the opposite side is used, and the heat transferred from the heated heat transfer roller to the fixing roller transfers the toner onto the copy paper. The image is fixed by fusing the film to the film.
しかしフルカラー用の電子複写機の熱定着装置について
いえば、これに用いられるカラートナーが黒色トナーに
比較して融点が低くかつシリコーンゴムと接着しやすい
ため、通常の複写機の熱定着装置に用いられる表面を研
削した定着ローラは使用することができなかった。すな
わちゴムローラ表面が研削されるとゴムに配合されてい
るシリカ等の充填剤が表面に露出し、これがトナーと接
着しやすいためばかりではなく、研削によりゴム表面に
細かい凹凸が生じこの凹部にトナーがつまって汚れの核
となりやすいため、複写紙のオフセットやローラへの巻
き付き現象が発生しやすかった。またこのような現象の
発生を防ぐため、熱定着装置においては従来から定着ロ
ーラの表面にシリコーンオイルのような離型剤を塗布す
ることが行なわれているが、表面を研削した定着ローラ
ではオフセットを完全に防止することができず、またこ
の離型剤によりローラのゴム被覆層が膨潤しやすく使用
寿命が短縮されるという問題があった。However, when it comes to the heat fixing device of a full-color electronic copying machine, the color toner used therein has a lower melting point than black toner and easily adheres to silicone rubber. A fusing roller with a ground surface could not be used. In other words, when the rubber roller surface is ground, fillers such as silica contained in the rubber are exposed to the surface, which not only makes it easier to adhere to toner, but also because the grinding creates fine irregularities on the rubber surface and toner is trapped in these recesses. This tends to clog and become a core of dirt, which tends to cause the copy paper to offset or get wrapped around the rollers. In order to prevent this phenomenon from occurring, a releasing agent such as silicone oil has traditionally been applied to the surface of the fixing roller in thermal fixing devices, but with a fixing roller whose surface has been ground, the offset This release agent cannot completely prevent the rubber coating layer of the roller from swelling, resulting in a shortened service life.
一方伝熱ローラについては、従来からの表面にフッ素樹
脂を被覆したローラでは以下に示す理由でコントロール
温度を高くする必要があり、高温オフセットが生じやす
いという問題があった。On the other hand, regarding heat transfer rollers, conventional rollers whose surfaces are coated with fluororesin require a high control temperature for the following reasons, and have a problem in that high-temperature offset tends to occur.
すなわち、前記伝熱ローラは熱容量が小さく、複写紙の
通過により定着ローラおよび伝熱ローラの表面温度が著
るしく低下し回復までに長い時間を要するため、加熱温
度を高めておかなければならなかった。That is, the heat transfer roller has a small heat capacity, and the surface temperature of the fixing roller and heat transfer roller drops significantly when the copy paper passes through them, and it takes a long time to recover, so the heating temperature must be kept high. Ta.
(発明の目的)
本発明はこれらの問題を解決するためになされたもので
、使用寿命が長く複写紙へのトナーのオフセットや定着
ローラへの複写紙の巻き付きのない、電子複写機特にフ
ルカラー用の複写機における熱定着装置を提供すること
を目的にする。(Objective of the Invention) The present invention has been made to solve these problems, and is designed for use in electronic copying machines, especially full-color copying machines, which has a long service life and does not cause toner offset to copy paper or copy paper wrapping around the fixing roller. An object of the present invention is to provide a heat fixing device for a copying machine.
(発明の概要)
本発明の電子複写機の熱定着装置は、研削什トげをする
ことなく表面が完全に平滑で(以下鏡面という。)、か
つ少なくとも表面層が耐油性に優れた常温硬化型のシリ
コーンゴムからなる定着ローラと、芯金上に薄肉で表面
研削されたゴム被覆層を設け、しかも内部に加熱手段を
内蔵した伝熱ローラとから成り、定着ローラの表面に連
続的に或いは断続的にトナーの離型剤を供給する手段を
備えて成ることを特徴としている。(Summary of the Invention) The heat fixing device of the electronic copying machine of the present invention has a completely smooth surface (hereinafter referred to as a mirror surface) without any grinding, and at least the surface layer is room temperature hardened with excellent oil resistance. It consists of a fixing roller made of shaped silicone rubber, and a heat transfer roller that has a thin rubber coating layer with a surface ground on a core metal and has a built-in heating means. It is characterized by comprising means for intermittently supplying a toner release agent.
(発明の実施例) 以下本発明を図面に示す実施例について説明する。(Example of the invention) The present invention will be described below with reference to embodiments shown in the drawings.
第1図は本発明の一実施例の断面説明図である。FIG. 1 is an explanatory cross-sectional view of one embodiment of the present invention.
図において符号1は定着ローラを示し、これは鉄、アル
ミニウム、ステンレススチール等の芯金2上に鏡面の耐
油性に優れた常温硬化型シリコーンゴム層3を設けて構
成され、複写紙4−トに付着したカラートナー5と接触
しながら矢印の方向に同転している。In the figure, reference numeral 1 indicates a fixing roller, which is constructed by providing a room-temperature curing silicone rubber layer 3 with a mirror surface and excellent oil resistance on a core metal 2 made of iron, aluminum, stainless steel, etc. It rotates in the direction of the arrow while contacting the color toner 5 attached to the surface.
このような定着ローラ1を製造するには例えば次のよう
な方法が採られる。For example, the following method is used to manufacture such a fixing roller 1.
すなわち第2図に示すように、まず円筒下キャップ6上
に、内周面に硬質クロムメッキが施され鏡面に仕上げら
れたステンレススチール製円筒体7を立てて装着し、こ
の中空内部に常温硬化型の液状シリコーンゴム8を注入
した後、この中に下キャップ9を取り付けた芯金10を
挿入して固定する。That is, as shown in FIG. 2, first, a stainless steel cylinder 7 whose inner circumferential surface is hard chromium plated and finished to a mirror finish is mounted upright on the cylindrical lower cap 6. After injecting the liquid silicone rubber 8 into the mold, the core metal 10 with the lower cap 9 attached thereto is inserted and fixed.
次いで円筒体7の上部に円筒上キャップ11を取着した
後、常温±3°C程度の温度で液状シリコーンゴム8を
完全に硬化させてから、円筒体7および上下キャップを
はずす。Next, after attaching the cylindrical top cap 11 to the upper part of the cylindrical body 7, the liquid silicone rubber 8 is completely cured at a temperature of approximately ±3° C., and then the cylindrical body 7 and the upper and lower caps are removed.
こうして外表面が鏡面でシリコーンゴム層3にその膨張
収縮に起因するひけのない定着ローラ1が得られる。In this way, a fixing roller 1 with a mirror-like outer surface and no sink marks on the silicone rubber layer 3 due to its expansion and contraction is obtained.
また複写紙4のカラートナ−5付着側と反対側ニハ、鉄
、アルミニウム、ステンレススチール等の芯金12上に
L’J’VやH’I’Vのようなゴムから5−
なり表面を研削した0、3〜1. OIIIB厚の薄肉
ゴム層13を被覆してなる伝熱ローラ14が配置されて
いる。In addition, on the side opposite to the color toner 5 adhesion side of the copy paper 4, grind the 5-shaped surface from rubber such as L'J'V or H'I'V on the core metal 12 made of iron, aluminum, stainless steel, etc. 0, 3-1. A heat transfer roller 14 covered with a thin rubber layer 13 having a thickness of OIIIB is disposed.
この伝熱ローラ14の芯金12の中空内部には、ハロゲ
ンランプ15が内蔵されており、伝熱ローラ14自体は
前述の定着ローラ1と外周面を接触させながら矢印の方
向に回転している。A halogen lamp 15 is built into the hollow interior of the core metal 12 of the heat transfer roller 14, and the heat transfer roller 14 itself rotates in the direction of the arrow while its outer peripheral surface is in contact with the aforementioned fixing roller 1. .
さらに回転する定着ローラ1の外周面には、シリコーン
オイル16に片端を浸したフェルト17が接して配設さ
れており、定着ローラ1のシリコーンゴム層表面に連続
的に適量ずつシリコーンオイルが塗布されるように構成
されている。Furthermore, a felt 17 with one end soaked in silicone oil 16 is placed in contact with the outer peripheral surface of the rotating fixing roller 1, and an appropriate amount of silicone oil is continuously applied to the surface of the silicone rubber layer of the fixing roller 1. It is configured to
このように構成される実施例の熱定着装置によれば、伝
熱ローラとして従来からの表面にフッ素樹脂を被覆した
ものに比べて熱容量の大きい薄肉ゴムローラを用いてい
るので、加熱コントロール湯度を150〜155℃から
145〜150℃に低くすることができ、エネルギーを
節約することができるばかりでなく高温オフセットを生
じさせない。また実施例に使用した伝熱ローラは、製造
6−
が容易でコストが安いばかりでなく、通紙性が良くソフ
トな画像が得られるという利点がある。According to the heat fixing device of the embodiment configured as described above, a thin rubber roller having a larger heat capacity than the conventional one whose surface is coated with fluororesin is used as the heat transfer roller, so the heating control temperature can be controlled. It can be lowered from 150-155°C to 145-150°C, which not only saves energy but also does not cause high temperature offset. Furthermore, the heat transfer roller used in the examples has the advantage that it is not only easy to manufacture and inexpensive, but also has good paper passing properties and can produce soft images.
さらに実施例の熱定着装置においては、カラートナーと
直接液する定着ローラのゴム層が耐油性に優れたa潟硬
化型のシリコーンゴムで構成されかつ表面が研削なしで
鏡面に仕上っているので、紙面の汚れやオフセットが生
じることがない。またゴム層がシリコーンオイルで膨潤
しに<<、シかもニフブ幅を大きくしローラ間荷重を小
さくすることができる。従って定着ローラおよび伝熱ロ
ーラの使用寿命が、従来の17000〜2000枚複写
から40000〜50000枚複写へ飛躍的に向上する
。Furthermore, in the heat fixing device of the embodiment, the rubber layer of the fixing roller that directly contacts the color toner is made of a-flat-curing silicone rubber with excellent oil resistance, and the surface is finished to a mirror surface without grinding. No stains or offsets on the paper surface. In addition, since the rubber layer swells with silicone oil, the nib width can be increased and the load between the rollers can be reduced. Therefore, the service life of the fixing roller and the heat transfer roller is dramatically improved from the conventional 17,000 to 2,000 copies to 40,000 to 50,000 copies.
次に本発明の熱定着装置の別の実施例を第3図に示す。Next, another embodiment of the heat fixing device of the present invention is shown in FIG.
この実施例においては、芯金2上にシリコーンゴム発泡
体のようなゴム発泡体からなる被覆層18を設け、その
上に耐油性に優れた常温硬化型シリコーンゴムからなり
鏡面を有する薄い表面層19を設けて定着ローラ1が構
成されている。In this embodiment, a coating layer 18 made of a rubber foam such as a silicone rubber foam is provided on the core bar 2, and a thin surface layer 18 made of a room-temperature curing silicone rubber with excellent oil resistance and having a mirror surface is provided thereon. 19 is provided to constitute the fixing roller 1.
また伝熱ローラ14およびシリコーンオイル16の塗布
機構はいずれも第1図に示す実施例と同様に構成されて
いる。Further, the heat transfer roller 14 and the application mechanism for silicone oil 16 are both constructed in the same manner as in the embodiment shown in FIG.
このように構成される熱定着装置は先の実施例について
述べた効果を全て発揮することができる上に、さらに以
下に記載する長所を有している。The heat fixing device constructed in this way can not only exhibit all the effects described in the previous embodiments, but also has the following advantages.
すなわちトナーと接する定着ローラ1の内部が断熱性が
高く軽量のゴム発泡体で構成されているので、熱の損失
が少ないばかりでなく、ローラ間荷重が小さくオフセッ
トが生じに〈<シかも使用寿命が長いという利点がある
。In other words, the interior of the fixing roller 1 that comes into contact with the toner is made of a lightweight rubber foam with high heat insulation properties, which not only reduces heat loss, but also reduces the load between the rollers and prevents offset from occurring. It has the advantage of being long.
具体的にはゴム発泡体被覆層18の厚さが4鶴で常温硬
化型シリコーンゴム表面層19の厚さが1鰭の外径40
簡の定着ローラ1と0,5鴎厚の表面を研削した薄肉ゴ
ム層13を有する伝熱ローラ14で構成される熱定着装
置は、ローラ間荷重が】Okgと極めて小さく、使用寿
命も40000〜50000枚の俊¥可能と極めて長か
った。Specifically, the rubber foam covering layer 18 has a thickness of 4 mm, and the room temperature curing silicone rubber surface layer 19 has an outer diameter of 4 mm.
The heat fixing device is composed of a simple fixing roller 1 and a heat transfer roller 14 having a thin rubber layer 13 whose surface is ground to a thickness of 0.5 mm.The load between the rollers is extremely small at 100 kg, and the service life is 40,000 to 40,000 kg. It was extremely long with 50,000 yen possible.
尚、比較のために芯金上に鏡面を有する5錦厚のゴム被
覆層を設けた外径5Qsaの定着ローラと外径60謔の
表面フッ素樹脂被覆伝熱ローラを組み合わせて従来から
の熱定着装置を構成した。この装置におけるローラ間荷
重は40に9と大きく使用寿命は17000〜2000
0枚複写と短かかった。For comparison, a fixing roller with an outer diameter of 5 Qsa and a heat transfer roller coated with a fluororesin on the surface and with an outer diameter of 60 cm was used in combination with a conventional heat fixing roller having a rubber coating layer with a mirror surface and a thickness of 5 mm on the core metal. Configured the device. The load between the rollers in this device is 9 in 40, and the service life is 17,000 to 2,000.
It took a short time with 0 copies.
(発明の効果)
以上の記載から明らかなように、本発明の熱定着装置に
よれば、特にフルカラー用の電子複写機においてトナー
の複写紙へのオフセット等を生じることなく鮮明でソフ
トな画像を複写することができる。(Effects of the Invention) As is clear from the above description, the heat fixing device of the present invention can produce clear and soft images without causing toner offset to copy paper, especially in full-color electronic copying machines. May be copied.
また加熱コントロール温度を低く設定することができ、
使用寿命が極めて長い。In addition, the heating control temperature can be set lower,
Extremely long service life.
第1図は本発明の一実施例の横断面説明図、第2図は第
1図における定着ローラの製造方法の一例を示す縦断面
図、第3図は本発明の別の実施例の横断面説明図である
。
1 −−−−−−−−−−−一−−一定着ローラ2.1
0,12−−−−芯金
9−
3 −−−−一−−−−−−−− 耐油性の常温硬化型
シリコーンゴム層
5 −−−−−−−−−−−−−− カラートナー7
−−−−−−−−−−−−− 円筒体13 −−−−−
−−−−−−−−− 表面研削薄肉ゴム層14 −−−
−−−−−−−−−−− 伝熱ローラ16 −−−−−
−−−−−−−−−− シリコーンオイル18 −−−
−−−−−−−−−−− ゴム発泡体被覆層19 −−
−−−一−−−−−−−−−−耐油性の常温硬化型シリ
コーンゴム表面層
10−
第1図
第2図
区習=叉]7゜
’J8開+1.’:GO−25GI79 (4)第3図
7FIG. 1 is an explanatory cross-sectional view of one embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view showing an example of the method of manufacturing the fixing roller in FIG. 1, and FIG. 3 is a cross-sectional view of another embodiment of the present invention. FIG. 1 ------------1-- Constant fixing roller 2.1
0,12---- Core metal 9- 3 -----1--------- Oil-resistant room temperature curing silicone rubber layer 5 --------------- Color toner 7
−−−−−−−−−−−− Cylindrical body 13 −−−−−
−−−−−−−− Surface ground thin rubber layer 14 −−−
−−−−−−−−−−− Heat transfer roller 16 −−−−−
−−−−−−−−−− Silicone oil 18 −−−
------ Rubber foam coating layer 19 ---
---------------Oil-resistant room-temperature curing silicone rubber surface layer 10-- Figure 1 Figure 2 Section = 7゜' J8 opening + 1. ': GO-25GI79 (4) Figure 3 7
Claims (1)
平滑な表面層を有し、複写紙上に付着したトナーと接し
つつ回転しこれを前記紙面に融着する定着ローラと、芯
金上に薄肉のゴム研削層を設けて成り、内部に加熱手段
を内蔵するとともに前記定着ローラと接触しつつこれと
反対方向に回転する伝熱ローラとから成り、前記定着ロ
ーラの表面に連続的に或いは断続的に前記トナーの離型
剤を供給する手段を備えて成ることを特徴とする電子複
写機の熱定着装置。1. A fixing roller, which has a completely smooth surface layer made of oil-resistant room-temperature-curing silicone rubber, rotates while contacting the toner adhered to the copy paper and fuses it to the paper surface, and a thin-walled roller on the core bar. The heat transfer roller is provided with a rubber grinding layer, has a built-in heating means, and rotates in the opposite direction to the fixing roller while being in contact with the fixing roller. A heat fixing device for an electronic copying machine, comprising means for supplying a releasing agent for the toner to the toner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11234584A JPH0642111B2 (en) | 1984-05-31 | 1984-05-31 | Heat fixing device for electronic copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11234584A JPH0642111B2 (en) | 1984-05-31 | 1984-05-31 | Heat fixing device for electronic copying machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60256179A true JPS60256179A (en) | 1985-12-17 |
JPH0642111B2 JPH0642111B2 (en) | 1994-06-01 |
Family
ID=14584360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11234584A Expired - Lifetime JPH0642111B2 (en) | 1984-05-31 | 1984-05-31 | Heat fixing device for electronic copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0642111B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63183475A (en) * | 1987-01-26 | 1988-07-28 | Arai Pump Mfg Co Ltd | Press roller for fixing and its production |
-
1984
- 1984-05-31 JP JP11234584A patent/JPH0642111B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63183475A (en) * | 1987-01-26 | 1988-07-28 | Arai Pump Mfg Co Ltd | Press roller for fixing and its production |
Also Published As
Publication number | Publication date |
---|---|
JPH0642111B2 (en) | 1994-06-01 |
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