JPS638677A - Heat fixing roller - Google Patents
Heat fixing rollerInfo
- Publication number
- JPS638677A JPS638677A JP15212986A JP15212986A JPS638677A JP S638677 A JPS638677 A JP S638677A JP 15212986 A JP15212986 A JP 15212986A JP 15212986 A JP15212986 A JP 15212986A JP S638677 A JPS638677 A JP S638677A
- Authority
- JP
- Japan
- Prior art keywords
- elastic layer
- heat fixing
- arbor
- heat
- fixing roller
- 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
- 229920001971 elastomer Polymers 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 5
- 239000006229 carbon black Substances 0.000 abstract description 4
- 229920002379 silicone rubber Polymers 0.000 abstract description 3
- 239000004945 silicone rubber Substances 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 30
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 108091008695 photoreceptors Proteins 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002344 surface layer Substances 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
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
- G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、静電写真複写機やファクシミリ等の画像記録
装置において、記録紙上に形成されたトナー粉末像を加
熱定着するのに用いられる熱定着用ローラに関するもの
である。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a heat treatment system used for heating and fixing a toner powder image formed on a recording paper in an image recording apparatus such as an electrostatographic copying machine or a facsimile machine. The present invention relates to a fixing roller.
（従来の技術〕
この種の熱定着用ローラとしては、耐熱性ゴムから成る
弾性層を芯金に固着成層し、前記弾性層の上に、液状の
フッ素系ゴムを焼き付けて成る厚さ２０〜３００μの表
皮層を形成したものが、特公昭５８−５１２６２号公報
等によって知られている。(Prior Art) This type of heat fixing roller is made by laminating an elastic layer made of heat-resistant rubber firmly on a core bar, and baking liquid fluorine-based rubber onto the elastic layer. One in which a skin layer of 300 μm is formed is known from Japanese Patent Publication No. 58-51262.
上記の従来例には、次のような問題点があった。 The above conventional example has the following problems.
即ち、上記の熱定着用ローラは、加熱ローラに圧接して
回転せしめたとき、接触面で摩擦帯電するので、芯金を
金属製の軸受や側板等を介して接地してお（のが普通で
ある。In other words, when the above-mentioned heat fixing roller is pressed into contact with the heating roller and rotated, it is charged by friction on the contact surface. It is.
しかしながら、弾性層を形成する耐熱性ゴムは通常、２
５Ｖの印加電圧で、表面抵抗が１Ｏ１３〜ＩＱＩｓΩも
あり、誘電率が高いので、弾性層に帯電した電荷は芯金
を接地したとしても、すぐには移動できない。そのため
、特に定着路の雰囲気湿度が低い時には、芯金を接地し
ているにもかかわらず弾性層に高電圧が発生しやすく、
熱定着用ローラの耐静電圧を越えた時点で当該ローラの
近くにある分離爪やその他の金属製部材にリークして静
電気ノイズが発生し、電気系制御回路が誤動作を起こす
ことがあった。However, the heat-resistant rubber that forms the elastic layer is usually 2
With an applied voltage of 5V, the surface resistance is 1O13 to IQIsΩ, and the dielectric constant is high, so even if the core metal is grounded, the charges on the elastic layer cannot be moved immediately. Therefore, especially when the atmospheric humidity in the fixing path is low, high voltage is likely to occur in the elastic layer even though the core metal is grounded.
When the electrostatic withstand voltage of the heat fixing roller is exceeded, electrostatic noise may be generated due to leakage to separation claws or other metal members near the roller, which may cause malfunction of the electrical system control circuit.
本発明の目的は、上記従来例の問題点を解消することに
ある。An object of the present invention is to solve the problems of the conventional example.
上記の目的を達成するために、本発明は、熱定着用ロー
ラの芯金に固着する弾性層を、耐熱性ゴム中に電気良導
性物質を混入した弾性ゴムで形成した点に特徴がある。In order to achieve the above object, the present invention is characterized in that the elastic layer fixed to the core metal of the heat fixing roller is formed of an elastic rubber made of heat-resistant rubber mixed with an electrically conductive substance. .
上記の構成によれば、弾性層が食型導性をもち弾性層か
ら芯金への電荷の移動が速やかに行われるので、芯金を
接地しさえすれば、弾性層には殆ど帯電しない。According to the above configuration, the elastic layer has eclipse conductivity and the charge is quickly transferred from the elastic layer to the core metal, so that as long as the core metal is grounded, the elastic layer is hardly charged.
以下、本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図は画像記録装置の一例である静電写真複写機の概
略を示す、この複写機は、原稿台１と原稿押え２とを上
部に備えた複写機本体３に感光体４を横架すると共に、
該感光体４のまわりに、帯電装置５、現像装置６、転写
装置７、記録紙分離装置８、クリーニング装置９を、そ
の順に配置し、かつ、前記原稿台ｌの下部空間に光学系
移動式の露光装置１０を設けると共に、カセットケース
１１内の記録紙を前記転写装置７に搬送する給紙搬送装
置１２と、分離後の記録紙を熱定着装置１３に搬送する
排紙搬送装置１４、および、定着後の記録紙をトレイ１
５に排出する排紙ローラ１６を設けて構成しである。FIG. 1 schematically shows an electrophotographic copying machine, which is an example of an image recording device. In this copying machine, a photoreceptor 4 is mounted horizontally on a copying machine main body 3, which has a document table 1 and a document holder 2 on the top. At the same time,
A charging device 5, a developing device 6, a transfer device 7, a recording paper separating device 8, and a cleaning device 9 are arranged in this order around the photoreceptor 4, and a movable optical system is arranged in the space below the document table l. an exposure device 10, a paper feed conveyance device 12 that conveys the recording paper in the cassette case 11 to the transfer device 7, a paper discharge conveyance device 14 that conveys the separated recording paper to the thermal fixing device 13, and , transfer the recording paper after fixing to Tray 1.
5 is provided with a discharge roller 16 for discharging the paper.
前記熱定着装置１３は、第２図、第３図に示すように、
上下一対の熱定着用ローラ１７．１８から成り、両ロー
ラ１７．１Ｂは、金属製の軸受および側板等を介して電
気的に接地されている。The heat fixing device 13, as shown in FIGS. 2 and 3,
It consists of a pair of upper and lower heat fixing rollers 17.18, and both rollers 17.1B are electrically grounded via metal bearings, side plates, and the like.
一方の熱定着用ローラ１７は、加熱を司るもので、アル
ミ等の金属からなる筒状の芯金１９にフッ素系樹脂２０
等をコーティングし、芯金１９の中に発熱ランプやコイ
ル等のヒータ２１を内蔵して構成しである。One heat fixing roller 17 is responsible for heating, and has a cylindrical core 19 made of metal such as aluminum and a fluorine-based resin 20.
The core metal 19 is coated with a heater 21 such as a heating lamp or a coil.
他方の熱定着用ローラ１８は、アルミ等の金属からなる
筒状の芯金２２に、耐熱性シリコーンゴム等の耐熱性ゴ
ム中に電気良導性物質の一例であるカーボンブラック粉
末を混入して得られた弾性ゴムより成る弾性層２３を固
着し、その上に、液状のフッ素系ゴムを高温下で焼き付
けた厚さ１０〜２０μで且つ焼付表面に凹凸がない表皮
層２４を形成したものである。The other heat fixing roller 18 has a cylindrical core metal 22 made of a metal such as aluminum, and carbon black powder, which is an example of an electrically conductive substance, is mixed into heat-resistant rubber such as heat-resistant silicone rubber. The elastic layer 23 made of the obtained elastic rubber is fixed, and a skin layer 24 is formed on top of the elastic layer 23, which has a thickness of 10 to 20 μm and has no unevenness on the baked surface, by baking liquid fluorine rubber at high temperature. be.
第３図中の２５は、前記熱定着用ローラ１８に対する液
塗布ローラであり、図外のパンに収容されたシリコーン
オイル等のオフセット防止液をローラ１７、１８表面に
塗布することにより、定着後の記録紙がローラ１７．１
８表面から容易に剥がれるようにすると共に、トナーの
一部がローラ１７に付着することによるオフセント現象
を防止するように構成しである。Reference numeral 25 in FIG. 3 is a liquid application roller for the heat fixing roller 18, and by applying an anti-offset liquid such as silicone oil stored in a pan (not shown) to the surfaces of the rollers 17 and 18, The recording paper is on roller 17.1
The toner is configured so that it can be easily peeled off from the surface of the roller 17, and to prevent an offset phenomenon caused by a portion of the toner adhering to the roller 17.
上記の実施例によれば、弾性層２３が、耐熱性ゴム中に
電気良導性物質であるカーボンブラック粉末を混入して
得られた弾性ゴムによって構成されているので、弾性層
２３の表面抵抗は、２５Ｖの印加電圧で、１０４〜１０
’Ωとなり、良導性をもつことになる。According to the above embodiment, since the elastic layer 23 is made of elastic rubber obtained by mixing carbon black powder, which is a good electrical conductor, into heat-resistant rubber, the surface resistance of the elastic layer 23 is is 104 to 10 at an applied voltage of 25V.
'Ω, and has good conductivity.
従って、弾性層２３から芯金２２への電荷の移動が速や
かになされ、芯金２２を経て接地されるので、殆ど帯電
することがない、そのため定着路の雰囲気湿度が低い場
合でも、熱定着用ローラ１８に高電圧が発生せず、リー
クによる静電気ノイズの発生を防止できる。Therefore, the charge is quickly transferred from the elastic layer 23 to the core bar 22, and is grounded via the core bar 22, so there is almost no charge.Therefore, even when the atmospheric humidity in the fixing path is low, High voltage is not generated in the roller 18, and generation of static electricity noise due to leakage can be prevented.
また、耐熱性ゴムにカーボンブラック粉末を混入するこ
とにより、弾性層２３の表面の離型性が低下することに
なるが、上記の実施例では、弾性層２３の表面に、液状
のフッ素系ゴムを高温下で焼き付けた厚さ１０〜２０μ
す且つ焼付表面に凹凸がない表皮層２４を形成しである
ので、トナーや記録紙の離型性が良好である。Furthermore, by mixing carbon black powder into the heat-resistant rubber, the mold releasability of the surface of the elastic layer 23 is reduced, but in the above embodiment, liquid fluorine rubber is added to the surface of the elastic layer 23. 10-20μ thick baked at high temperature
Moreover, since the surface layer 24 having no irregularities on the printed surface is formed, the release properties of toner and recording paper are good.
第４図は、本発明の別実施例を示す、この実施例は、ア
ルミ等の金属からなる筒状の芯金２２に、耐熱性シリコ
ーンゴム等の耐熱性ゴム中に電気良導性シリコーンを混
入して得られた弾性ゴムより成る弾性層２３を固着して
、弾性層２３を有する熱定着用ローラ１８を構成した点
に特徴があり、弾性層２３の表面には、上述した如き表
皮層が設けられていない、その他の構成は先の実施例と
同じである。FIG. 4 shows another embodiment of the present invention. In this embodiment, a cylindrical core bar 22 made of metal such as aluminum is coated with electrically conductive silicone in heat-resistant rubber such as heat-resistant silicone rubber. The heat fixing roller 18 having the elastic layer 23 is constructed by fixing the elastic layer 23 made of elastic rubber obtained by mixing the elastic rubber, and the surface of the elastic layer 23 has a skin layer as described above. The rest of the structure is the same as the previous embodiment.
この実施例によれば、弾性層２３の表面抵抗は、２５Ｖ
の印加電圧で、１０ｂ〜１０’Ωとなり、弾性層２３が
良導性をもつことになるので、先の実施例と同様な利点
が得られるばかりでなく、耐熱性ゴム中に混入する電気
良導性物質として、電気良導性シリコーンを使用したの
で、弾性層２３の表面の離型性が良く、前述した表皮層
２４を省略して、製造工数の減少による製造能率の向上
と大幅なコストダウンとを図り得るのである。According to this embodiment, the surface resistance of the elastic layer 23 is 25V.
With an applied voltage of Since electrically conductive silicone is used as the conductive material, the surface of the elastic layer 23 has good mold releasability, and the above-mentioned skin layer 24 can be omitted, improving manufacturing efficiency and significantly reducing manufacturing costs by reducing manufacturing man-hours. It is possible to aim for down.
尚、図示しないが、上記再実施例における弾性層２３を
有する熱定着用ローラ１８の芯金２２にも前記ヒータ２
１と同様なヒータを内蔵させてもよい。つまり、本発明
は、加熱と加圧の両件用を司る熱定着用ローラについて
も同様に実施できるものである。Although not shown, the heater 2 is also attached to the core bar 22 of the heat fixing roller 18 having the elastic layer 23 in the second embodiment.
A heater similar to 1 may be incorporated. In other words, the present invention can be similarly applied to a heat fixing roller that handles both heating and pressure.
（発明の効果）
本発明は、上述した構成よりなり、芯金に固着した弾性
層が、耐熱性ゴム中に電気良導性物質を混入して得られ
た弾性ゴムによって構成されているので、弾性層が良導
性をもつことになり、弾性層から芯金への電荷の移動が
速やかになされ、芯金を接地しさえすれば、熱定着用ロ
ーラに殆ど帯電することがない。(Effects of the Invention) The present invention has the above-described structure, and the elastic layer fixed to the core metal is made of elastic rubber obtained by mixing an electrically conductive substance into heat-resistant rubber. Since the elastic layer has good conductivity, charge can be quickly transferred from the elastic layer to the core metal, and as long as the core metal is grounded, the heat fixing roller is hardly charged.
従って、定着路の雰囲気湿度が低い場合でも、熱定着用
ローラに高電圧が発生せず、リークによる静電気ノイズ
の発生やこれによる電気系制御回路の誤動作を防止でき
る。Therefore, even when the atmospheric humidity in the fixing path is low, high voltage is not generated in the heat fixing roller, and generation of static electricity noise due to leakage and malfunction of the electrical system control circuit due to this can be prevented.
第１図乃至第３図は本発明の一実施例を示し、第１図は
静電複写機の概略断面図、第２図は加熱定着装置の概略
縦断正面回、第３図は加熱定着装置の要部縦断側面図で
ある。第４図は本発明の別実施例を示す要部縦断側面図
である。
１Ｂ・・・熱定着用ローラ、２２・・・芯金、２３・・
・弾性層。1 to 3 show one embodiment of the present invention, FIG. 1 is a schematic cross-sectional view of an electrostatic copying machine, FIG. 2 is a schematic vertical front view of a heat-fixing device, and FIG. 3 is a schematic cross-sectional view of a heat-fixing device. FIG. FIG. 4 is a longitudinal sectional side view of a main part showing another embodiment of the present invention. 1B... Heat fixing roller, 22... Core metal, 23...
・Elastic layer.
Claims (2)
ムより成る弾性層を芯金に固着してあることを特徴とす
る熱定着用ローラ。(1) A heat fixing roller characterized by having an elastic layer made of elastic rubber containing heat-resistant rubber mixed with a conductive material and fixed to a core metal.
ることを特徴とする特許請求の範囲第（１）項に記載の
熱定着用ローラ。(2) The heat fixing roller according to claim (1), wherein the electrically conductive material is electrically conductive silicone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15212986A JPS638677A (en) | 1986-06-28 | 1986-06-28 | Heat fixing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15212986A JPS638677A (en) | 1986-06-28 | 1986-06-28 | Heat fixing roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS638677A true JPS638677A (en) | 1988-01-14 |
Family
ID=15533692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15212986A Pending JPS638677A (en) | 1986-06-28 | 1986-06-28 | Heat fixing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS638677A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5045649A (en) * | 1973-07-25 | 1975-04-23 | ||
| JPS542137A (en) * | 1977-06-07 | 1979-01-09 | Konishiroku Photo Ind Co Ltd | Roller fixing device for electrophotographic copier |
| JPS5756854A (en) * | 1980-09-18 | 1982-04-05 | Showa Electric Wire & Cable Co Ltd | Nonchargeable roller |
| JPS60189779A (en) * | 1984-03-12 | 1985-09-27 | Canon Inc | Fixing device |
-
1986
- 1986-06-28 JP JP15212986A patent/JPS638677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5045649A (en) * | 1973-07-25 | 1975-04-23 | ||
| JPS542137A (en) * | 1977-06-07 | 1979-01-09 | Konishiroku Photo Ind Co Ltd | Roller fixing device for electrophotographic copier |
| JPS5756854A (en) * | 1980-09-18 | 1982-04-05 | Showa Electric Wire & Cable Co Ltd | Nonchargeable roller |
| JPS60189779A (en) * | 1984-03-12 | 1985-09-27 | Canon Inc | Fixing device |
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