JPH02150879A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPH02150879A JPH02150879A JP30623488A JP30623488A JPH02150879A JP H02150879 A JPH02150879 A JP H02150879A JP 30623488 A JP30623488 A JP 30623488A JP 30623488 A JP30623488 A JP 30623488A JP H02150879 A JPH02150879 A JP H02150879A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- blade
- removal
- rotary body
- 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.)
- Pending
Links
- 238000011084 recovery Methods 0.000 abstract 5
- 238000010438 heat treatment Methods 0.000 description 33
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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
- G03G15/2017—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】
〔概 要〕
未定着のトナー画像を有する支持体を圧接回転する一対
の回転体間を通過させて、前記トナー画像を加熱定着す
るようにした定着装置に関し、トナー画像と圧接する側
の前記回転体表面のトナー付着の防止を目的とし、
前記トナー画像と圧接する側の前記回転体表面に接触す
る関係で、その表面に付着したトナーを除去する除去用
ブレードを設け、かつ前記除去用ブレードの背面に前記
回転体と除去用ブレードの接触面を越えたトナーを回収
するメツシュ状の回収部を設ける構成とする。Detailed Description of the Invention [Summary] This fixing device heats and fixes a toner image by passing a support having an unfixed toner image between a pair of rotating bodies that rotate under pressure. In order to prevent toner from adhering to the surface of the rotating body that is in pressure contact with the toner image, a removing blade is provided in contact with the surface of the rotating body that is in pressure contact with the toner image and removes toner that has adhered to the surface of the rotating body that is in pressure contact with the toner image. , and a mesh-like collecting portion is provided on the back surface of the removing blade for collecting toner that has passed over the contact surface between the rotating body and the removing blade.
本発明は、電子写真複写機又は印刷機等の定着装置、特
に未定着のトナー画像を有する支持体を、圧接回転する
一対の回転体間を通過させて前記トナー画像を加熱定着
するようにした定着装置の改良に関する。The present invention relates to a fixing device such as an electrophotographic copying machine or a printing machine, in particular, a support having an unfixed toner image is passed between a pair of rotating bodies rotating in pressure contact to heat and fix the toner image. This invention relates to improvements in fixing devices.
従来から、電子写真複写機では、未定着のトナー画像を
有する支持体を、圧接回転する加圧ローラと加熱ローラ
間を通過させて前記トナー画像を加熱定着している。BACKGROUND ART Conventionally, in an electrophotographic copying machine, a support having an unfixed toner image is passed between a pressure roller and a heating roller that rotate under pressure to heat and fix the toner image.
第３図は、従来の電子写真複写機の定着装置でおる。FIG. 3 shows a fixing device of a conventional electrophotographic copying machine.
ｌは加圧ローラ、２は印刷用紙、３は加熱ローラ、４は
フェルト、５はゴム・ブレード、６は印刷用紙表面に静
電気によって付着しているトナー７は加熱ローラに付着
したトナー、９．１０はゴム・ブレードに付着したトナ
ーである。1 is a pressure roller, 2 is a printing paper, 3 is a heating roller, 4 is a felt, 5 is a rubber blade, 6 is a toner that is attached to the surface of the printing paper by static electricity, 7 is a toner that is attached to the heating roller, 9. 10 is toner attached to the rubber blade.
加圧ローラ１と加熱ローラ３は、図に省略した装置本体
に回転可能に支持された上下一対の定着ローラで、加圧
ローラ１は、加熱ローラ３の局面に適当な圧力によって
接触させたローラである。The pressure roller 1 and the heating roller 3 are a pair of upper and lower fixing rollers that are rotatably supported by the main body of the apparatus (not shown), and the pressure roller 1 is a roller that is brought into contact with the surface of the heating roller 3 with appropriate pressure. It is.
加熱ローラ３は、通常１９０度程０温度を有しており、
加熱ローラ３の表面はアルミニウム、ステンレス等の金
属で構成されている。加圧ローラ１は、図面上、時計周
り、加熱ローラ３は、反時計周りの方向に回転する。印
刷用紙２は、加圧ローラｌと加熱ローラ３の間に挟まり
、図面上、右から左に送られる。印刷用紙２は、静電気
によって、トナー６が表面に付着している。前記トナー
６は、加熱ローラ３によって、熔融し、加圧ローラ１に
押されることによって、用紙に定着する。The heating roller 3 normally has a zero temperature of about 190 degrees,
The surface of the heating roller 3 is made of metal such as aluminum or stainless steel. The pressure roller 1 rotates clockwise in the drawing, and the heating roller 3 rotates counterclockwise. The printing paper 2 is sandwiched between the pressure roller 1 and the heating roller 3, and is fed from right to left in the drawing. Toner 6 is attached to the surface of printing paper 2 due to static electricity. The toner 6 is melted by the heating roller 3 and fixed on the paper by being pressed by the pressure roller 1.
以下、図面に従って、従来の技術を説明する。The conventional technology will be described below with reference to the drawings.
トナー６が付着した印刷用紙２が、加圧ローラ１及び加
熱ローラ３の回転により、搬送される。The printing paper 2 to which the toner 6 is attached is conveyed by the rotation of the pressure roller 1 and the heating roller 3 .
トナーは、全て用紙に定着されず、加熱ローラ３により
溶融されたトナーの一部が前記加熱ローラ３の表面に付
着する。前記表面に付着したトナー７は、加熱ローラ３
の回転によって、印刷用紙２との接触部に移動し、印刷
用紙２に付着する恐れがあるので、ゴムの弾性により、
加熱ローラ３に密着しているゴム・ブレード５によって
、加熱ローラ３から除去される。前記トナーは、ゴム・
ブレード５の加熱ローラ３の回転方向の反対側１０に蓄
積される。Not all of the toner is fixed on the paper, but a portion of the toner melted by the heating roller 3 adheres to the surface of the heating roller 3. The toner 7 attached to the surface is removed by heating roller 3.
Due to the rotation of the rubber, it may move to the contact area with the printing paper 2 and adhere to the printing paper 2, so due to the elasticity of the rubber,
It is removed from the heating roller 3 by means of a rubber blade 5 which is in close contact with the heating roller 3. The toner is made of rubber.
It is accumulated on the side 10 of the blade 5 opposite to the direction of rotation of the heating roller 3.
又、前記加熱ローラ３の表面には、フェルト４により、
オイルが所定量供給される。前記オイルは、加熱ローラ
３に印刷用紙２が張り付かないようにする為である。Further, the surface of the heating roller 3 is covered with felt 4.
A predetermined amount of oil is supplied. The purpose of the oil is to prevent the printing paper 2 from sticking to the heating roller 3.
従来、ゴム・ブレード５は、ゴムの弾性により、加熱ロ
ーラ３に密着し、上述した様にトナーを除去する。然し
、加熱ローラ３に付着したトナーは、全て、ゴム・ブレ
ード５のローラ回転方向の反対側に蓄積されるわけでは
ない。一部の溶融したトナーは、ゴム・ブレード５と加
熱ローラ３の僅かな隙間を抜けて、ゴム・ブレード５の
加熱ローラ３の回転方向側９に付着してしまう。前記ゴ
ム・ブレード５の加熱ローラ３の回転方向側に付着した
トナー９は、定着が何度も行われる過程で、鍾乳石状に
蓄積してしまう。Conventionally, the rubber blade 5 adheres tightly to the heating roller 3 due to the elasticity of the rubber and removes toner as described above. However, not all of the toner adhering to the heating roller 3 is accumulated on the opposite side of the rubber blade 5 from the direction of rotation of the roller. Some of the melted toner passes through the small gap between the rubber blade 5 and the heating roller 3 and adheres to the side 9 of the rubber blade 5 in the direction of rotation of the heating roller 3. The toner 9 adhering to the side of the rubber blade 5 in the rotational direction of the heating roller 3 accumulates in the form of stalactites during the process of repeated fixing.
蓄積したトナー９は、ある量を越えると、時折トナー９
が離脱し、再度加熱ローラ３に付着して、印刷用紙２に
汚れとして定着してしまい、印字品質に重大な影響があ
った。又、前記離脱したトナーがフェルト４に付着する
こともあり、オイル供給の性能が低下し、印刷用紙３を
ローラが巻き込んでしまう恐れもある。When the accumulated toner 9 exceeds a certain amount, the toner 9 sometimes
The particles were detached, adhered to the heating roller 3 again, and were fixed as stains on the printing paper 2, which had a serious effect on print quality. Further, the separated toner may adhere to the felt 4, which may reduce the oil supply performance and cause the printing paper 3 to be caught in the rollers.
近年、電子写真複写機、印刷機の印字性能の高品質が要
求されている。前記要求を満たす為には、定着装置の前
記課題を解決することが重要視されている。従って、本
発明は、定着装置の加熱ローラにトナーが付着するのを
防止することを目的とし、前記課題を解決する手段を提
供する物である。In recent years, high quality printing performance has been required for electrophotographic copying machines and printing machines. In order to meet the above requirements, it is important to solve the above problems of the fixing device. Therefore, the present invention aims to prevent toner from adhering to the heating roller of a fixing device, and provides a means for solving the above problem.
未定着のトナー画像を有する支持体を圧接回転する一対
の回転体間を通過させて、前記トナー画像を加熱定着す
るようにした定着装置において、前記トナー画像と圧接
する側の前記回転体表面に接触する関係で、その表面に
付着したトナーを除去する除去用ブレードを設け、かつ
前記除去用ブレードの背面に前記回転体と除去用ブレー
ドの接触面を越えたトナーを回収するメツシュ状の回収
部を設ける。In a fixing device that heats and fixes the toner image by passing a support having an unfixed toner image between a pair of rotating bodies that press and rotate, the surface of the rotating body that is in pressure contact with the toner image is fixed. A removing blade is provided to remove toner adhering to the surface of the removing blade in contact with the rotating body, and a mesh-like collection unit is provided on the back side of the removing blade to collect toner that has exceeded the contact surface between the rotating body and the removing blade. will be established.
除去用ブレードの前記回転体の回転方向に抜けてくるト
ナーは、メツシュ状の回収部に付着する様にする。前記
付着したトナーは、メツシュ状の回収部の網目に蓄積さ
れるので、回収部から離脱し難くなる。The toner coming off in the rotational direction of the rotary body of the removing blade is made to adhere to the mesh-like collecting portion. Since the adhered toner is accumulated in the mesh-like collection section, it becomes difficult to separate from the collection section.
第１図及び第２図は本発明の一実施例の説明図である。 FIGS. 1 and 2 are explanatory diagrams of an embodiment of the present invention.
第１図中、５０はゴム・ブレードである。その他の番号
は〔従来の技術〕での名称と同様である。In FIG. 1, 50 is a rubber blade. Other numbers are the same as the names in [Prior Art].
第２図はゴム・ブレード５０の斜視図である。５１は板
状のゴム、５２は台、５３は金網で、トナーを回収する
メツシュ状の回収部、５４は付着防止部である。ゴム・
ブレード５０は従来のゴム・プレートに金網５３と台５
２を設けた構成になっている。FIG. 2 is a perspective view of rubber blade 50. 51 is a plate-shaped rubber, 52 is a stand, 53 is a wire mesh, which is a mesh-like collection part for collecting toner, and 54 is an adhesion prevention part. Rubber/
The blade 50 is a conventional rubber plate with a wire mesh 53 and a base 5.
It has a configuration with 2.
以下、図面に従って、実施例を説明する。Examples will be described below with reference to the drawings.
ゴム・ブレード５０は図面に示す様に、従来と同様に取
り付けられる。Rubber blade 50 is mounted in a conventional manner as shown in the drawings.
さて、加熱ローラ３に付着したトナー７は、従来同様ゴ
ム・ブレード５０に掻き落とされて、加熱ローラ３の回
転方向の反対側の表面に蓄積する。Now, the toner 7 adhering to the heating roller 3 is scraped off by the rubber blade 50 as in the conventional case, and accumulates on the surface of the heating roller 3 on the opposite side in the direction of rotation.
然し、従来の技術で述べた様に、ゴム・ブレード５０と
加熱ローラ３の接触部の僅かな隙間を抜けて、溶融トナ
ーがゴム・ブレード５０の加熱ローラ３の回転方向側の
裏面に付着する。However, as described in the prior art section, the molten toner passes through the small gap between the contact portion of the rubber blade 50 and the heating roller 3 and adheres to the back surface of the rubber blade 50 on the side in the rotational direction of the heating roller 3. .
この付着時に、融解トナーは、毛細管現象によって、金
網５３の網に沿って付着する。融解トナーは鍾乳石状に
蓄積されるのでは無く、金網の網目に蓄積される。従っ
て、網目がトナー蓄積の場所に成るので、トナーが収納
される形になり、ゴム・ブレード５０からトナーが離脱
しにくくなる。During this adhesion, the molten toner adheres along the mesh of the wire mesh 53 due to capillary action. The fused toner does not accumulate in stalactites, but rather in the mesh of the wire mesh. Therefore, the mesh provides a site for toner accumulation, which provides a way for the toner to be contained and makes it difficult for the toner to escape from the rubber blade 50.
第２図に示す様に、ゴム・ブレードに付着防止部５４を
設けても良い。前記付着防止部５４を設ければ、仮に、
金網５３に収納出来るトナー景を超えて蓄積されても台
５２の付着防止部５４が加熱ローラ３への付着を防止す
る。As shown in FIG. 2, the rubber blade may be provided with an anti-adhesive portion 54. If the adhesion prevention part 54 is provided, temporarily,
Even if more toner is accumulated than can be stored in the wire mesh 53, the adhesion prevention portion 54 of the stand 52 prevents the toner from adhering to the heating roller 3.
従って、ゴム・ブレード５０に蓄積されるトナーを金網
５３及び台５４で回収する為、加熱ローラ３にトナーが
付着することがないので、印刷用紙の汚れは無くなる。Therefore, since the toner accumulated on the rubber blade 50 is collected by the wire mesh 53 and the stand 54, the toner does not adhere to the heating roller 3, so that there is no stain on the printing paper.
又、フェルト４にトナーが付着することも無い。Further, toner does not adhere to the felt 4.
さて、金網の網目は出来るだけ微細なものが、好ましい
。また、金網を２重、３重にしても良い。Now, it is preferable that the mesh of the wire mesh be as fine as possible. Further, the wire mesh may be made double or triple layered.
以上、実施例に従って本発明を説明した。The present invention has been described above according to examples.
実施例では、トナーを回収するメツシュ状の回収部材と
して金網５３を設けたが、金網に限るもので無＜、棚状
の部材でも構わない。In the embodiment, the wire mesh 53 is provided as a mesh-like collecting member for collecting toner, but the present invention is not limited to a wire mesh, and a shelf-like member may also be used.
上記に示す如く、本発明は、本発明の要旨に従い種々の
変形が可能であり、本発明はそれらを排除するものでは
ない。As shown above, the present invention can be modified in various ways according to the gist of the present invention, and the present invention does not exclude them.
本発明によると、定着装置に於ける印字汚れが著しく減
少し、ローラへのトナーの付着を従来に増して防ぐので
、定着装面の耐久度が向上する。According to the present invention, print stains in the fixing device are significantly reduced and toner adhesion to the roller is prevented more than ever before, so the durability of the fixing surface is improved.
第１図は本発明の実施例の側面図、第２図は、第１図中
ゴム・ブレード５０の斜視図、第３図は従来例の側面図
である。
１・・・・・・・・・・加圧ローラ
２・・・・・・・・・・印刷用紙
３・・・・・・・・・・加熱ローラ
４・・・・・・・・・・フェルト
５．５０・・・・・・・ゴム・ブレード６、 ７． ９
． １０ ・ ・ ・ トナー５３・・・・・・・・・
・網
濱 １ 図
ツム フレートの・乍十ｈ１刀
第２ 図FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a perspective view of the rubber blade 50 in FIG. 1, and FIG. 3 is a side view of a conventional example. 1......Pressure roller 2...Printing paper 3...Heating roller 4...・Felt 5.50...Rubber blade 6, 7. 9
．． 10 ・ ・ ・ Toner 53・・・・・・・・・
・Amihama 1 Diagram Tsum Freight's 11h1 Sword 2nd Diagram
Claims (1)
の回転体間を通過させて、前記トナー画像を加熱定着す
るようにした定着装置において、前記トナー画像と圧接
する側の前記回転体（３）表面に接触する関係で、その
表面に付着したトナーを除去する除去用ブレード（５１
）を設け、かつ前記除去用ブレード（５１）の背面に前
記回転体と除去用ブレード（５１）の接触面を越えたト
ナーを回収するメッシュ状の回収部（５３）を設けたこ
とを特徴とする定着装置。In the fixing device, the toner image is heat-fixed by passing between a pair of rotating bodies that press and rotate a support having an unfixed toner image, the rotating body (3) on the side that is in pressure contact with the toner image; ) a removal blade (51) that comes into contact with the surface and removes toner attached to the surface
), and a mesh-like collecting portion (53) is provided on the back surface of the removing blade (51) for collecting toner that has passed over the contact surface between the rotating body and the removing blade (51). fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30623488A JPH02150879A (en) | 1988-12-02 | 1988-12-02 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30623488A JPH02150879A (en) | 1988-12-02 | 1988-12-02 | Fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02150879A true JPH02150879A (en) | 1990-06-11 |
Family
ID=17954607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30623488A Pending JPH02150879A (en) | 1988-12-02 | 1988-12-02 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02150879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7817951B2 (en) | 2005-08-31 | 2010-10-19 | Sharp Kabushiki Kaisha | Cleaning member and image forming apparatus using the same |
-
1988
- 1988-12-02 JP JP30623488A patent/JPH02150879A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7817951B2 (en) | 2005-08-31 | 2010-10-19 | Sharp Kabushiki Kaisha | Cleaning member and image forming apparatus using the same |
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