JPH05188817A - Fixing device for electrophotographic device - Google Patents
Fixing device for electrophotographic deviceInfo
- Publication number
- JPH05188817A JPH05188817A JP1835392A JP1835392A JPH05188817A JP H05188817 A JPH05188817 A JP H05188817A JP 1835392 A JP1835392 A JP 1835392A JP 1835392 A JP1835392 A JP 1835392A JP H05188817 A JPH05188817 A JP H05188817A
- Authority
- JP
- Japan
- Prior art keywords
- fixing
- gear
- fixing gear
- fixing roller
- 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
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は複写機等の電子写真装置
において使用される熱ローラ方式の定着装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat roller type fixing device used in an electrophotographic apparatus such as a copying machine.
【０００２】[0002]
【従来の技術】複写機等で使用される熱ローラ方式の定
着装置は、その一例を図４に示す如く、ヒータ１を内蔵
した定着ローラ２と、該定着ローラ２に圧接配置した加
圧ローラ３とからなるローラ対を有し、搬送部から送ら
れてきたトナー未定着転写紙を、つれ回りする上記ロー
ラ２，３間のニップを通過させることにより、トナーを
定着させて排紙部へ排出させるようにしてある。この
際、定着に必要な圧は、ローラ２，３間のニップ幅が一
定に保たれるように、加圧スプリング４で加圧レバー５
を傾動させることにより与えられ、一方、定着に必要な
温度は、定着ローラ２の表面部に接触させたサーミスタ
６の検出レベルに応じて、ヒータ１がＯＮ・ＯＦＦされ
ることにより制御されるようにしてある。なお、７は排
紙側に配置した定着爪、８はトナーオフセット防止用塗
布フェルト、９は温度ヒューズ、１０は排紙検知器を示
す。2. Description of the Related Art As shown in FIG. 4, a heat roller type fixing device used in a copying machine or the like has a fixing roller 2 containing a heater 1 and a pressure roller arranged in pressure contact with the fixing roller 2. The toner-unfixed transfer paper, which has a roller pair composed of 3 and 3, is passed through the nip between the revolving rollers 2 and 3 to fix the toner and to the paper discharge section. It is designed to be discharged. At this time, the pressure necessary for fixing is adjusted by the pressure spring 4 so that the nip width between the rollers 2 and 3 is kept constant.
The temperature required for fixing is controlled by turning on / off the heater 1 in accordance with the detection level of the thermistor 6 that is in contact with the surface of the fixing roller 2. I am doing it. Reference numeral 7 is a fixing claw arranged on the paper discharge side, 8 is a coating felt for preventing toner offset, 9 is a temperature fuse, and 10 is a paper discharge detector.
【０００３】上記定着装置において、定着ローラ２の駆
動方式として、定着ローラ２の端部外周に定着ギヤを嵌
設するように組み付け、該定着ギヤに、メインモータ側
からの駆動力を伝えるようにした伝達ギヤを噛合させる
ようにしたものがある。In the above fixing device, as a driving method of the fixing roller 2, a fixing gear is assembled so as to be fitted around the outer periphery of the end portion of the fixing roller 2, and the driving force from the main motor side is transmitted to the fixing gear. Some transmission gears are made to mesh with each other.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来方
式の場合には、定着ギヤが定着ローラの軸方向（スラス
ト方向）へずれたり外れたりすることを防止するため
に、定着ローラの端に止め輪を嵌め付けるようにしてお
り、したがって、止め輪の部品コスト、定着ローラの加
工代が必要であり、且つ組み付けにも手間が掛かること
から、コストアップにつながる問題がある。However, in the case of the above-mentioned conventional method, in order to prevent the fixing gear from shifting or coming off in the axial direction (thrust direction) of the fixing roller, the fixing gear is stopped at the end of the fixing roller. Since the ring is fitted, the cost of the snap ring parts, the machining cost of the fixing roller are required, and the assembly is troublesome, which causes a problem of cost increase.
【０００５】そこで、本発明は、止め輪を用いることな
く定着ローラに組み付けた定着ギヤのスラスト方向への
移動を防止することができるようにし、部品点数、加工
代を削減すると共に組み付けの手間を省くことができる
ようにしようとするものである。Therefore, according to the present invention, it is possible to prevent the fixing gear assembled to the fixing roller from moving in the thrust direction without using a retaining ring, thereby reducing the number of parts and machining allowance and reducing the labor of assembling. It tries to be able to omit it.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記課題を解
決するために、定着ローラの一端部に定着ギヤを嵌設
し、該定着ギヤに駆動力を伝えることにより定着ローラ
を回転させるようにしてある電子写真装置の定着装置に
おいて、上記定着ギヤの内周面に突起を形成し、且つ上
記定着ローラの一端部に、上記突起を係止してスラスト
方向への移動を規制するための係止溝を設けた構成とす
る。SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a fixing gear is fitted on one end of a fixing roller, and a driving force is transmitted to the fixing gear to rotate the fixing roller. In the fixing device of the electrophotographic apparatus, a protrusion is formed on the inner peripheral surface of the fixing gear, and the protrusion is locked at one end of the fixing roller to restrict the movement in the thrust direction. The structure is provided with a locking groove.
【０００７】又、係止溝をＬ字形とした構成とするとよ
い。Further, it is preferable that the locking groove is L-shaped.
【０００８】[0008]
【作用】定着ローラへの定着ギヤの組み付け時に、定着
ギヤの突起を定着ローラの係止溝に嵌めて係止させるだ
けで、定着ギヤの位置が固定されるため、止め輪を不要
とすることができる。When the fixing gear is assembled to the fixing roller, the fixing gear can be fixed in position by simply fitting and fixing the protrusion of the fixing gear into the fixing groove of the fixing roller. You can
【０００９】又、係止溝をＬ字形とすることにより、組
み付けが極めて容易となる。Further, by making the locking groove L-shaped, the assembling becomes extremely easy.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面を参照して説明
する。図１乃至図３は本発明の一実施例を示すもので、
定着ローラ２の駆動側端部に定着ギヤ１１を嵌設し、該
定着ギヤ１１に駆動力を伝えることにより定着ローラ２
を回転させるようにしてある電子写真装置の定着装置に
おいて、上記定着ギヤ１１の内周面に突起１１ａを形成
し、且つ該突起１１ａを嵌合させて係止するようにした
Ｌ字形の係止溝２ａを、上記定着ローラ２の端部に設け
た構成とする。図１において、１２は定着フレーム、１
３は定着ローラ２の軸受を示す。Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention,
A fixing gear 11 is fitted on the driving-side end of the fixing roller 2 and a driving force is transmitted to the fixing gear 11 to fix the fixing roller 2.
In a fixing device of an electrophotographic apparatus, which is configured to rotate, a protrusion 11a is formed on the inner peripheral surface of the fixing gear 11, and the protrusion 11a is fitted and locked in an L-shaped lock. The groove 2a is provided at the end of the fixing roller 2. In FIG. 1, 12 is a fixing frame, 1
Reference numeral 3 denotes a bearing of the fixing roller 2.
【００１１】定着ギヤ１１を定着ローラ２に組み付ける
場合には、定着ギヤ１１の突起１１ａを、定着フレーム
１２に軸受１３を介して支持されている定着ローラ２の
係止溝２ａに対し、軸方向から嵌め入れ、次に、円周方
向へ回転させるようにする。かかる状態で、定着フレー
ム１２を図示しない電子写真装置の本体ベースに取り付
け、定着ギヤ１１をメインモータからの伝達ギヤ（図示
せず）に噛合させるようにする。When the fixing gear 11 is assembled to the fixing roller 2, the projection 11a of the fixing gear 11 is axially aligned with the locking groove 2a of the fixing roller 2 supported by the fixing frame 12 via the bearing 13. Then, it is rotated in the circumferential direction. In this state, the fixing frame 12 is attached to the main body base of the electrophotographic apparatus (not shown), and the fixing gear 11 is meshed with the transmission gear (not shown) from the main motor.
【００１２】上記において、定着ギヤ１１は図１の矢印
方向へのみ回転するため、突起１１ａが係止溝２ａに係
止された状態を保持したまま回転する。したがって、定
着ギヤ１１は定着ローラ２のスラスト方向へ移動するこ
とはない。In the above description, since the fixing gear 11 rotates only in the direction of the arrow in FIG. 1, the fixing gear 11 rotates while maintaining the state in which the protrusion 11a is locked in the locking groove 2a. Therefore, the fixing gear 11 does not move in the thrust direction of the fixing roller 2.
【００１３】なお、上記実施例では、定着ローラ２に設
けた係止溝２ａの形状をＬ字形とした場合を示したが、
たとえば、Ｊ字形や他の適宜な形状を選定し得ること、
その他本発明の要旨を逸脱しない範囲内において種々変
更を加え得ることは勿論である。In the above embodiment, the locking groove 2a provided in the fixing roller 2 is L-shaped.
For example, selecting a J-shape or any other suitable shape,
Needless to say, various changes can be made without departing from the scope of the present invention.
【００１４】[0014]
【発明の効果】以上述べた如く、本発明の電子写真装置
の定着装置によれば、定着ギヤの内周面に突起を形成
し、且つ定着ギヤを嵌設する定着ローラの一端部に、上
記突起を係止してスラスト方向への移動を規制するため
の係止溝を設けた構成としたので、従来必要としていた
止め輪を不要にできると共に、定着ローラの端部に止め
輪を入れるための穴又は溝の加工、止め輪を組み付ける
ための手間を省くことができ、更に、係止溝をＬ字形と
することにより、定着ギヤの組み付けを極めて簡単に行
うことができる、等の優れた効果を発揮する。As described above, according to the fixing device of the electrophotographic apparatus of the present invention, the projection is formed on the inner peripheral surface of the fixing gear, and one end portion of the fixing roller into which the fixing gear is fitted has the above-mentioned structure. Since the locking groove is provided to lock the protrusion to regulate the movement in the thrust direction, the previously required retaining ring can be eliminated and the retaining ring can be inserted at the end of the fixing roller. It is excellent in that it is possible to process the holes or grooves, and to save the labor for assembling the retaining ring, and by making the locking groove L-shaped, the fixing gear can be assembled very easily. Be effective.
【図１】本発明の電子写真装置の定着装置の一実施例を
示す要部の正面図である。FIG. 1 is a front view of essential parts showing an embodiment of a fixing device of an electrophotographic apparatus of the present invention.
【図２】要部の分解正面図である。FIG. 2 is an exploded front view of a main part.
【図３】要部の分解斜視図である。FIG. 3 is an exploded perspective view of a main part.
【図４】定着装置の一例を示す概要図である。FIG. 4 is a schematic diagram illustrating an example of a fixing device.
２ 定着ローラ ２ａ 係止溝 １１ 定着ギヤ １１ａ 突起 2 Fixing roller 2a Locking groove 11 Fixing gear 11a Protrusion
Claims (2)
し、該定着ギヤに駆動力を伝えることにより定着ローラ
を回転させるようにしてある電子写真装置の定着装置に
おいて、上記定着ギヤの内周面に突起を形成し、且つ上
記定着ローラの一端部に、上記突起を係止してスラスト
方向への移動を規制するための係止溝を設けたことを特
徴とする電子写真装置の定着装置。1. A fixing device of an electrophotographic apparatus, wherein a fixing gear is fitted to one end of the fixing roller, and the fixing roller is rotated by transmitting a driving force to the fixing gear. A fixing device for an electrophotographic apparatus, characterized in that a protrusion is formed on a peripheral surface, and a locking groove for locking the protrusion to restrict movement in the thrust direction is provided at one end of the fixing roller. apparatus.
子写真装置の定着装置。2. The fixing device for an electrophotographic apparatus according to claim 1, wherein the locking groove is L-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1835392A JPH05188817A (en) | 1992-01-08 | 1992-01-08 | Fixing device for electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1835392A JPH05188817A (en) | 1992-01-08 | 1992-01-08 | Fixing device for electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05188817A true JPH05188817A (en) | 1993-07-30 |
Family
ID=11969321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1835392A Pending JPH05188817A (en) | 1992-01-08 | 1992-01-08 | Fixing device for electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05188817A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7133637B2 (en) | 2003-06-11 | 2006-11-07 | Samsung Electronics Co., Ltd. | Heat roller assembly for image forming apparatus |
| CN105824224A (en) * | 2015-01-09 | 2016-08-03 | 江西镭博钛电子科技有限公司 | Processing box |
| JP2018031962A (en) * | 2016-08-26 | 2018-03-01 | 京セラドキュメントソリューションズ株式会社 | Fixation device and image formation device |
-
1992
- 1992-01-08 JP JP1835392A patent/JPH05188817A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7133637B2 (en) | 2003-06-11 | 2006-11-07 | Samsung Electronics Co., Ltd. | Heat roller assembly for image forming apparatus |
| CN105824224A (en) * | 2015-01-09 | 2016-08-03 | 江西镭博钛电子科技有限公司 | Processing box |
| CN105824224B (en) * | 2015-01-09 | 2023-05-05 | 江西镭博钛电子科技有限公司 | Processing box |
| JP2018031962A (en) * | 2016-08-26 | 2018-03-01 | 京セラドキュメントソリューションズ株式会社 | Fixation device and image formation device |
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