JPH0481792B2 - - Google Patents
Info
- Publication number
- JPH0481792B2 JPH0481792B2 JP59241051A JP24105184A JPH0481792B2 JP H0481792 B2 JPH0481792 B2 JP H0481792B2 JP 59241051 A JP59241051 A JP 59241051A JP 24105184 A JP24105184 A JP 24105184A JP H0481792 B2 JPH0481792 B2 JP H0481792B2
- Authority
- JP
- Japan
- Prior art keywords
- heating roll
- toner
- roll
- heat
- blade
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000004140 cleaning Methods 0.000 claims description 13
- 230000020169 heat generation Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真装置や静電印刷装置等の画
像形成装置において、紙等の支持体上に形成され
たトナー像を、少なくとも一方が加熱機構を有
し、互いに圧接回転する一対のロール間で定着さ
せる加熱定着装置に関する。Detailed Description of the Invention [Industrial Application Field] The present invention provides an image forming apparatus such as an electrophotographic apparatus or an electrostatic printing apparatus, in which at least one of the toner images formed on a support such as paper is The present invention relates to a heat fixing device that has a heating mechanism and performs fixing between a pair of rolls that rotate in pressure contact with each other.
画像形成装置における定着装置の一つとして、
内部に熱源（赤外線ランプ、ハロゲンランプ、ニ
クロム線等）を有する良熱伝導性の金属コアの表
面を四弗化エチレン樹脂、パーフルオロアルコキ
シ樹脂等のトナーに対して非粘着性の耐熱材料で
被覆した加熱ロールと、表面を耐熱弾性体層（一
般にはシリコンゴムが用いられる）で被覆した加
熱ロールを有する加熱ロール型の加熱定着装置が
知られている。
As one of the fixing devices in the image forming apparatus,
The surface of a metal core with good thermal conductivity that has a heat source inside (infrared lamp, halogen lamp, nichrome wire, etc.) is coated with a heat-resistant material that is non-adhesive to toner, such as tetrafluoroethylene resin or perfluoroalkoxy resin. A heating roll-type heating fixing device is known, which includes a heating roll having a heat-resistant elastic layer and a heating roll whose surface is coated with a heat-resistant elastic layer (generally silicone rubber is used).
この種加熱定着装置においては、オフセツト防
止のために耐熱性かつ離型性を有する材料で形成
したブレードを有するクリーニング部材を加熱ロ
ールの周囲に設け、このブレードのエツヂを加熱
ロールに当接させて、加熱ロールに付着したトナ
ーを除去することが一般に行なわれている。（例
えば実公昭53−32602号、特開昭56−52783号、同
56−128661号の各公報参照）
またこの種定着装置においては、加熱ロールと
加圧ロールとこの順に上下に配置した構成が多く
採用されているが、画像形成装置の構造によつて
は（トナー像を保持した支持体の搬送経路を画像
形成装置の上部に設ける場合など）加圧ロールを
上に、加熱ロールを下に配置することもある。
（例えば特公昭57−46794号公報参照）
〔発明の解決すべき技術課題〕
上述したブレードによるクリーニングにおいて
は、トナーは加熱ロール表面に融着しているた
め、ブレードのエツヂをロール表面を摺擦しても
トナーの完全な除去は困難であつた。そこでブレ
ードの当接力を強くすることも考えられるが、こ
の方法では加熱ロールの表面に傷が生じ易く、そ
の寿命を短くするという問題が生ずる。 In this type of heat fixing device, in order to prevent offset, a cleaning member having a blade made of a heat-resistant and releasable material is provided around the heating roll, and the edge of this blade is brought into contact with the heating roll. Generally, toner adhering to a heating roll is removed. (For example, Utility Model Publication No. 53-32602, Japanese Unexamined Patent Publication No. 56-52783,
56-128661) In this type of fixing device, a configuration in which a heating roll and a pressure roll are arranged vertically in this order is often adopted, but depending on the structure of the image forming device ( (For example, when a conveyance path for a support carrying an image is provided at the top of an image forming apparatus), a pressure roll may be placed above and a heating roll may be placed below.
(For example, see Japanese Patent Publication No. 57-46794.) [Technical Problem to be Solved by the Invention] In the above-mentioned cleaning using the blade, since the toner is fused to the surface of the heating roll, the edge of the blade is rubbed against the surface of the roll. However, it was difficult to completely remove the toner. Therefore, it may be possible to strengthen the contact force of the blade, but this method tends to cause scratches on the surface of the heating roll, resulting in a problem of shortening its lifespan.
またブレードにより除去されたトナーをそのま
まにしておくと装置内に飛散してしまうので、こ
のトナーを別の容器に収容しておくことが必要と
なる。しかして従来は回収トナーを収容する容器
の容量が十分でなく、回収トナーを定期的に装置
外に排出する操作が必要であつた。 Furthermore, if the toner removed by the blade is left as it is, it will scatter inside the device, so it is necessary to store this toner in a separate container. However, in the past, the capacity of the container containing the collected toner was not sufficient, and it was necessary to periodically discharge the collected toner out of the apparatus.
本発明の目的は、上述の従来技術の問題点を解
消し、加熱ロールに付着したトナーを確実に除去
することができ、しかも、除去したトナーを定着
ロールの寿命がくるまでの間収容できる加熱定着
装置を提供することである。
It is an object of the present invention to solve the above-mentioned problems of the prior art, to provide a heating system capable of reliably removing toner adhering to a heating roll, and storing the removed toner until the end of the life of the fixing roll. An object of the present invention is to provide a fixing device.
本発明の加熱定着装置は、加圧ロールの下位に
表面に耐熱離型性層を有し内部に発熱源を有する
加熱ロールを配設しかつ前記加圧ロールと前記両
ロールの圧接部にトナー像を保持した支持体を通
過せしめると共に、前記加熱ロールの回転方向か
らみて前記圧接部の下流側にブレードとその支持
部材を有するクリーニング部材を配設し、前記ブ
レードのエツヂを前記加熱ロールの表面に当接さ
せてなる加熱定着装置において、前記加熱ロール
の表面をトナー軟化点付近の温度に加熱しかつ前
記加熱ロールを回転させて、前記加熱ロールの表
面に付着したトナーを除去してから前記支持体を
前記圧接部を通すように構成すると共に、前記加
熱ロールの周囲に断熱カバーを配設し、前記断熱
カバーの底部に前記クリーニング部材の支持部材
を取り付け、前記クリーニング部材と前記断熱カ
バーとで囲まれた空間に前記クリーニング部材に
より除去されたトナーを回収するようにしたこと
を特徴とする。
The heat fixing device of the present invention is provided with a heating roll having a heat-resistant releasable layer on its surface and a heat generation source inside below the pressure roll, and toner in the pressure contact portion between the pressure roll and both rolls. A cleaning member having a blade and a supporting member for the blade is disposed on the downstream side of the pressure contact portion when viewed from the rotating direction of the heating roll, and the edge of the blade is removed from the surface of the heating roll. In the heating fixing device, the surface of the heating roll is heated to a temperature near the toner softening point, and the heating roll is rotated to remove the toner adhering to the surface of the heating roll, and then the A support member is configured to pass through the pressure contact portion, a heat insulating cover is provided around the heating roll, a support member for the cleaning member is attached to the bottom of the heat insulating cover, and the cleaning member and the heat insulating cover are connected to each other. The toner removed by the cleaning member is collected in a space surrounded by.
以下本発明の詳細を図面により説明する。 The details of the present invention will be explained below with reference to the drawings.
ここで第１図は、本発明の一実施例に係る加熱
定着装置の断面図である。 Here, FIG. 1 is a sectional view of a heat fixing device according to an embodiment of the present invention.
同図において、１は加圧ロールで、金属製中空
コア２の外周面を耐熱弾性体層３で被覆して形成
されている。４は加熱ロールで、内部に熱源５を
有する金属製中空コア６の外周面を耐熱離型性層
７で被覆して形成されている。加圧ロール１の周
囲は断熱カバー８で囲まれ、その外側に耐熱ケー
ス９が装着されている。加熱ロール４の表面にエ
ツヂが当接するブレード１０は支持板１１の先端
に取着され、支持板１１は支持部材１２によつて
保持されている。また加熱ロール４の表面に近接
した温度ヒユーズ１３は、支持板１４に取着さ
れ、支持板１４は支持部材１５によつて保持され
ている。そして加熱ローラ４の周囲には断熱カバ
ー１６が設けられ、更にその外側には耐熱ケース
１７が装着されている。またブレード１０を支持
する支持部材１２と温度ヒユーズ１３を支持する
支持部材１５は共に断熱カバー１６に装着されて
いる。ブレード１０を含むクリーニング部材と断
熱カバー１６により、ブレード１０により掻落さ
れたトナー２４を収容するための空間１８が形成
される。また、熱源５は温度制御回路（図示せ
ず）に接続され、複写機の予熱スイツチをオンす
るとトナーの軟化点付近の温度にロール表面を加
熱し、コピーボタンを押すとロール表面を所定の
定着温度に加熱するように構成されている。ま
た、金属製中空コア６は（図示しない）駆動源と
その制御回路に接続され、制御回路は複写機の予
熱スイツチをオンすると駆動源が始動するように
構成されている。なお１９は給紙ガイド、２０は
排紙ガイド、２１は分離爪、２２はトナー像、２
３は支持体を示している。 In the figure, reference numeral 1 denotes a pressure roll, which is formed by covering the outer peripheral surface of a metal hollow core 2 with a heat-resistant elastic layer 3. Reference numeral 4 denotes a heating roll, which is formed by covering the outer peripheral surface of a metal hollow core 6 having a heat source 5 therein with a heat-resistant release layer 7. The pressure roll 1 is surrounded by a heat insulating cover 8, and a heat resistant case 9 is attached to the outside thereof. A blade 10 whose edge contacts the surface of the heating roll 4 is attached to the tip of a support plate 11, and the support plate 11 is held by a support member 12. Further, a temperature fuse 13 close to the surface of the heating roll 4 is attached to a support plate 14, and the support plate 14 is held by a support member 15. A heat insulating cover 16 is provided around the heating roller 4, and a heat resistant case 17 is attached to the outside of the heat insulating cover 16. Further, a support member 12 that supports the blade 10 and a support member 15 that supports the temperature fuse 13 are both attached to a heat insulating cover 16. The cleaning member including the blade 10 and the heat insulating cover 16 form a space 18 for accommodating the toner 24 scraped off by the blade 10. The heat source 5 is connected to a temperature control circuit (not shown), and when the preheating switch of the copying machine is turned on, the roll surface is heated to a temperature near the softening point of the toner, and when the copy button is pressed, the roll surface is heated to a predetermined fixing temperature. configured to heat to a temperature. Further, the metal hollow core 6 is connected to a drive source (not shown) and its control circuit, and the control circuit is configured so that the drive source starts when the preheating switch of the copying machine is turned on. Note that 19 is a paper feed guide, 20 is a paper ejection guide, 21 is a separation claw, 22 is a toner image, and 2
3 indicates a support.
このような構成によれば、予熱スイツチをオン
するすると、加熱ロール４が回転すると共に、加
熱ロール４の表面はトナーの軟化点付近に加熱さ
れる。よつてロール４の表面に付着したトナーは
パサパサした状態になり、ブレード１０により容
易にロール表面から掻落されて、空間１８内に回
収される。ついでコピーボタンをおすと、トナー
像２２を支持した支持体２３が両ロール間に送り
込まれ、トナー像２２は支持体２３上に定着され
る。 According to such a configuration, when the preheating switch is turned on, the heating roll 4 rotates and the surface of the heating roll 4 is heated to around the softening point of the toner. As a result, the toner adhering to the surface of the roll 4 becomes dry and is easily scraped off from the roll surface by the blade 10 and collected into the space 18. Then, when the copy button is pressed, the support 23 supporting the toner image 22 is sent between the two rolls, and the toner image 22 is fixed on the support 23.
すなわち、上記構成によれば、定着前に予め加
熱ロール４の表面に付着したトナーを除去するた
め、オフセツトを有効に防止することができる。
ここで、通紙前に加熱ロールを加熱する場合、ロ
ールの表面温度はトナーの軟化点よりあまり低い
とトナーの除去は困難で、一方表面温度が高すぎ
てもトナーは完全に溶融してその除去が困難とな
るので、トナーの軟化点付近具体的には150〜200
℃の範囲がよい。 That is, according to the above configuration, since the toner adhering to the surface of the heating roll 4 is removed in advance before fixing, offset can be effectively prevented.
When heating the heating roll before paper feeding, if the surface temperature of the roll is much lower than the softening point of the toner, it will be difficult to remove the toner, but if the surface temperature is too high, the toner will completely melt and its Since it is difficult to remove the toner, it is recommended to use around the softening point of the toner.
A range of ℃ is preferable.
次に、ブレードにより除去されたトナーは空間
１８内に溜まるが、この容量は加熱ロールの寿命
がつきるまでの間（５〜15万枚）に回収されるト
ナーが収容しうるようにしておけば、定着装置の
交換（廃却）までの間に回収トナーの廃棄は不要
となり、メインテナンスの点で極めて有利であ
る。なお空間１８はクリーニング部材と断熱カバ
ー１６により形成されるので、断熱カバーの形
状、寸法等を適宜設定することにより、回収トナ
ーを収納するに足る容積をもつた空間を形成する
ことができる。 Next, the toner removed by the blade accumulates in the space 18, but this capacity should be set so that it can accommodate the toner that will be collected until the end of the heating roll's life (50,000 to 150,000 sheets). This eliminates the need to dispose of the collected toner until the fixing device is replaced (discarded), which is extremely advantageous in terms of maintenance. Note that since the space 18 is formed by the cleaning member and the heat insulating cover 16, by appropriately setting the shape, dimensions, etc. of the heat insulating cover, it is possible to form a space with a volume sufficient to accommodate the collected toner.
以上に記述の如く、本発明によれば、コピー操
作前に加熱ロールに付着したトナーを除去するこ
とができるため、オフセツトのない高品質のコピ
ーが得られ、又ブレードにより除去されたトナー
も定着装置内に保たれ、保守・点検が容易とな
る。
As described above, according to the present invention, the toner adhering to the heating roll can be removed before the copying operation, so high-quality copies without offset can be obtained, and the toner removed by the blade can also be fixed. It is kept within the device, making maintenance and inspection easy.
第１図は本発明の一実施例に係る加熱定着装置
の断面図である。
１：加圧ロール、４：加熱ロール、５：熱源、
１０：クリーニングブレード。
FIG. 1 is a sectional view of a heat fixing device according to an embodiment of the present invention. 1: Pressure roll, 4: Heating roll, 5: Heat source,
10: Cleaning blade.
Claims (1)
し内部に発熱源を有する加熱ロールを配設しかつ
前記加圧ロールと前記加熱ロールとを互いに圧接
せしめ、前記両ロールの圧接部にトナー像を保持
した支持体を通過せしめると共に、前記加熱ロー
ルの回転方向からみて前記圧接部の下流側にブレ
ードとその支持部材を有するクリーニング部材を
配設し、前記ブレードのエツヂを前記加熱ロール
の表面に当接させてなる加熱定着装置において、
前記加熱ロールの表面をトナー軟化点付近の温度
に加熱しかつ前記加熱ロールを回転させて、前記
加熱ロールの表面に付着したトナーを除去してか
ら前記支持体を前記圧接部を通すように構成する
と共に、前記加熱ロールの周囲に断熱カバーを配
設し、前記断熱カバーの底部に前記クリーニング
部材の支持部材を取り付け、前記クリーニング部
材と前記断熱カバーとで囲まれた空間に前記クリ
ーニング部材により除去されたトナーを回収する
ようにしたことを特徴とする加熱定着装置。1 A heating roll having a heat-resistant release layer on its surface and a heat generation source inside is disposed below the pressure roll, and the pressure roll and the heating roll are brought into pressure contact with each other, and the pressure contact portion of both rolls is A cleaning member having a blade and a support member for the blade is disposed on the downstream side of the pressure contact portion when viewed from the rotating direction of the heating roll, and the edge of the blade is passed through the support holding the toner image on the heating roll. In a heat fixing device that is brought into contact with the surface of
The surface of the heating roll is heated to a temperature near the toner softening point and the heating roll is rotated to remove toner adhering to the surface of the heating roll, and then the support is passed through the pressure contact portion. At the same time, a heat insulating cover is disposed around the heating roll, a support member for the cleaning member is attached to the bottom of the heat insulating cover, and a space surrounded by the cleaning member and the heat insulating cover is cleaned by the cleaning member. A heat fixing device characterized in that the toner is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24105184A JPS61118779A (en) | 1984-11-15 | 1984-11-15 | Heat fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24105184A JPS61118779A (en) | 1984-11-15 | 1984-11-15 | Heat fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61118779A JPS61118779A (en) | 1986-06-06 |
| JPH0481792B2 true JPH0481792B2 (en) | 1992-12-24 |
Family
ID=17068576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24105184A Granted JPS61118779A (en) | 1984-11-15 | 1984-11-15 | Heat fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61118779A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019078876A (en) * | 2017-10-24 | 2019-05-23 | 京セラドキュメントソリューションズ株式会社 | Fixing device and image forming apparatus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640830B2 (en) * | 1973-11-19 | 1981-09-24 | ||
| JPS529441A (en) * | 1975-07-14 | 1977-01-25 | Fuji Xerox Co Ltd | Fixative device of the thermal roller type for the electrostatic photo copying |
| JPS5516515U (en) * | 1978-07-14 | 1980-02-01 | ||
| JPS6051110B2 (en) * | 1979-06-15 | 1985-11-12 | 京セラミタ株式会社 | Heat fixing device of electrophotographic copying machine |
| JPS565576A (en) * | 1979-06-28 | 1981-01-21 | Ricoh Co Ltd | Fixing device |
| JPS56142563A (en) * | 1980-04-07 | 1981-11-06 | Canon Inc | Fixing device |
| JPS5725234U (en) * | 1980-07-21 | 1982-02-09 | ||
| JPH0114037Y2 (en) * | 1980-08-14 | 1989-04-25 |
-
1984
- 1984-11-15 JP JP24105184A patent/JPS61118779A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61118779A (en) | 1986-06-06 |
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