JP3241895B2 - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JP3241895B2 JP3241895B2 JP24463993A JP24463993A JP3241895B2 JP 3241895 B2 JP3241895 B2 JP 3241895B2 JP 24463993 A JP24463993 A JP 24463993A JP 24463993 A JP24463993 A JP 24463993A JP 3241895 B2 JP3241895 B2 JP 3241895B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- fixing device
- fuse
- fixing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Fixing For Electrophotography (AREA)
- Control Of Temperature (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、複写機、プリンタ等
の画像形成装置の定着装置に関する。詳しくは温度ヒュ
−ズが用いられる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 fixing device for an image forming apparatus such as a copying machine and a printer. More specifically, the present invention relates to a fixing device using a temperature fuse.
【０００２】[0002]
【従来の技術】画像形成装置の定着装置としては、図１
に示すごとく、熱源１を内蔵する定着ロ−ラ２と、これ
に圧接する加圧ロ−ラ３と前記定着ロ−ラ２に近接され
ている温度ヒュ−ズ４と前記定着ロ−ラ２に当接されて
いる分離爪５と前記定着ロ−ラ２に当接、又は近接して
いる温度検知手段６と前記定着ロ−ラ２に当接している
クリ−ニング部材７を有し、前記定着ロ−ラ２と前記加
圧ロ−ラ３のニップ部に未定着トナ−像を担持する記録
紙８を通過させ、前記定着ロ−ラ２の熱で前記記録紙８
上のトナ−像Ｔを加熱、加圧してトナ−像Ｔを前記記録
紙８に融着させて定着を行なう。そして前記記録紙８は
前記分離爪５により前記定着ロ−ラ２から分離する。前
記温度検知手段６より検知された前記定着ロ−ラ２の表
面温度は定着に必要な温度を保持するよう制御を行な
う。2. Description of the Related Art As a fixing device of an image forming apparatus, FIG.
As shown in FIG. 2, a fixing roller 2 having a heat source 1 built therein, a pressure roller 3 pressed against the heat source 1, a temperature fuse 4 close to the fixing roller 2, and the fixing roller 2 are provided. A temperature detecting means 6 which is in contact with or close to the separation claw 5 which is in contact with the fixing roller 2 and a cleaning member 7 which is in contact with the fixing roller 2; The recording paper 8 carrying an unfixed toner image is passed through the nip portion between the fixing roller 2 and the pressure roller 3, and the recording paper 8 is heated by the fixing roller 2.
The toner image T is heated and pressed to fuse the toner image T to the recording paper 8 to perform fixing. The recording paper 8 is separated from the fixing roller 2 by the separation claw 5. The surface temperature of the fixing roller 2 detected by the temperature detecting means 6 is controlled so as to maintain a temperature necessary for fixing.
【０００３】そして、万が一前記定着ロ−ラ２の表面温
度が異常に上昇した場合、画像形成装置の過昇温防止手
段として異常温に反応して前記熱源１の通電を遮断する
前記温度ヒュ−ズ４を設けている。また、前記記録紙８
に定着せず残ったトナ−は前記定着ロ−ラ２に付着す
る。このトナ−を取り除くため前記クリ−ニング部材７
を設けている。In the event that the surface temperature of the fixing roller 2 rises abnormally, the temperature heater which cuts off the power supply to the heat source 1 in response to an abnormal temperature as a means for preventing excessive temperature rise of the image forming apparatus. Size 4 is provided. Further, the recording paper 8
The toner remaining unfixed on the fixing roller 2 adheres to the fixing roller 2. The cleaning member 7 is used to remove the toner.
Is provided.
【０００４】[0004]
【発明が解決しようとする課題】ここで、前記温度ヒュ
−ズ４を設置する場合温度ヒュ−ズを保持するための部
品や定着ロ−ラ等の設計上の誤差や、各部品の設置位置
における誤差等により当初予定していた前記温度ヒュ−
ズ４と前記定着ロ−ラ２との間における距離にも±０．
５ミリ程度の誤差が生じてしまい、前記温度ヒュ−ズ４
の反応する温度にバラツキが発生してしまうという不具
合が生じていた。Here, when the temperature fuse 4 is installed, there are errors in the design of components for holding the temperature fuse, the fixing roller, etc., and the installation position of each component. The temperature hue initially planned due to errors in
The distance between the fixing roller 2 and the fixing roller 2 is also ± 0.
An error of about 5 mm occurs, and the temperature fuse 4
However, there has been a problem that the reaction temperature varies.
【０００５】[0005]
【課題を解決するための手段】この発明は、上記の不具
合を解決するため、温度ヒュ−ズ保持部材に調整機能を
設けることにより、設置時等の調整時に、定着ロ−ラと
温度ヒュ−ズとの距離を一定にすることができる。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an adjusting function for a temperature fuse holding member so that the fixing roller and the temperature fuse can be adjusted at the time of installation or the like. Distance can be kept constant.
【０００６】このように構成した定着装置によれば温度
ヒューズの設置時に温度ヒューズと定着ローラとの距離
を一定とすることができるため、温度ヒューズの反応す
る温度は一定となる。当該効果に加えて、弾性部材が異
常温度で熱変形することで、温度ヒューズが加熱部材に
近づくので、温度ヒューズを溶断するのにかかる時間を
短くなり、定着装置の異常事態を早い時期に解除するこ
ともできる。ここで、異常温度とは、通常、１００度か
ら２５０度の間の温度をいうが、これに限定されるもの
ではない。 According to the fixing device having such a configuration, the distance between the thermal fuse and the fixing roller can be kept constant when the thermal fuse is installed, so that the temperature at which the thermal fuse reacts becomes constant. In addition to this effect, the elastic member
Thermal deformation at room temperature causes thermal fuse to
As it approaches, the time it takes to blow the thermal fuse
It will be shorter and the fixing device
Can also be. Here, the abnormal temperature is usually 100 degrees.
Temperature between 250 ° C and 250 ° C, but not limited to this
is not.
【０００７】[0007]
【実施例】以下、本発明の実施例を添付図面を参照して
説明する。図２は本発明の定着装置の過昇温防止部の概
略図である。熱源１と温度ヒュ−ズ４は直列接続されて
おり、定着ロ−ラ２が異常温度まで上昇した場合、温度
ヒュ−ズ４がその温度に反応し溶断され、熱源１からの
熱供給を停止する。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a schematic view of the excessive temperature rise prevention section of the fixing device of the present invention. The heat source 1 and the temperature fuse 4 are connected in series, and when the fixing roller 2 rises to an abnormal temperature, the temperature fuse 4 reacts to the temperature and is blown off, and the heat supply from the heat source 1 is stopped. I do.
【０００８】ここで前記温度ヒュ−ズ４を正確に異常温
度に反応させるため温度ヒュ−ズ保持部材９として前記
温度ヒュ−ズ４を固定するブラケット１０、弾性部材と
しての板バネ１１、調節部材としてのねじ１２を図２及
び図３に示すように枠体１４に取り付ける。前記板バネ
１１と前記ブラケット１０、に設けられた図示しないね
じ孔には、ねじ溝はなくそのため前記板バネ１１と前記
ブラケット１０は図２にある矢印方向に移動可能であ
る。前記枠体１４には図示しない前記ねじ１２を止める
ねじ孔が設けてある。前記温度ヒュ−ズ４と前記定着ロ
−ラ２との距離を調整するときは、前記枠体１４に設け
られた溝１４ａからギャプゲ−ジ１３を挿入し、前記温
度ヒュ−ズ４と前記定着ロ−ラ２との間に置き、前記ね
じ１２を締める。すると前記温度ヒュ−ズ４は図３に示
すような、前記枠体１４に設けられた案内穴１４ｂとブ
ラケット案内部１０ａにガイドされて降下し、前記ギャ
プゲ−ジ１３に当接して止まる。このとき前記ブラケッ
ト１３と前記枠体１４の間には、前記板バネ１１がある
ためその弾性力により前記温度ヒュ−ズは固定される。Here, in order to accurately react the temperature fuse 4 to an abnormal temperature, a bracket 10 for fixing the temperature fuse 4 as a temperature fuse holding member 9, a leaf spring 11 as an elastic member, and an adjusting member. 2 is attached to the frame body 14 as shown in FIGS. The screw holes (not shown) provided in the leaf spring 11 and the bracket 10 do not have a thread groove, so that the leaf spring 11 and the bracket 10 can move in the arrow direction shown in FIG. The frame 14 has a screw hole for fixing the screw 12 (not shown). When adjusting the distance between the temperature fuse 4 and the fixing roller 2, a gap gage 13 is inserted from a groove 14a provided in the frame 14, and the temperature fuse 4 and the fixing roller 2 are fixed. Place it between the roller 2 and tighten the screw 12. Then, as shown in FIG. 3, the temperature fuse 4 descends while being guided by the guide holes 14b and the bracket guide portions 10a provided in the frame 14, and comes into contact with the gap gage 13 and stops. At this time, since the leaf spring 11 is provided between the bracket 13 and the frame 14, the temperature fuse is fixed by its elastic force.
【０００９】ここで前記板バネ１１は周囲が１００度か
ら２５０度のような異常温度で熱変形を行なう樹脂を用
いることにより前記板バネ１１は上記温度内で図４
（ｂ）のように変形し前記温度ヒュ−ズ４は前記定着ロ
−ラ２に近づくので、前記温度ヒュ−ズを溶断するのに
かかる時間を短くすることができ、前記定着装置の異常
状態の解除を早めることができる。Here, the leaf spring 11 is made of a resin which undergoes thermal deformation at an abnormal temperature, such as 100 to 250 degrees, so that the leaf spring 11 is kept within the above temperature range as shown in FIG.
Since the temperature fuse 4 is deformed as shown in FIG. 3B and approaches the fixing roller 2, the time required to blow the temperature fuse can be shortened, and the fixing device is in an abnormal state. Can be canceled earlier.
【００１０】本実施例では前記板バネ１１が熱変形を行
なう温度を１００度から２５０度としたが、これに限定
されるものではない。In the present embodiment, the temperature at which the leaf spring 11 undergoes thermal deformation is set to 100 to 250 degrees, but is not limited to this.
【００１１】[0011]
【発明の効果】以上説明したように、この発明によれ
ば、温度ヒュ−ズの設置時に温度ヒュ−ズと定着ロ−ラ
との距離を調節し一定とすることができるため、温度ヒ
ュ−ズの反応する温度は一定となり、簡単な構造で、ど
の製品にも一定の温度範囲で過昇温防止機能を働かすこ
とができる。当該効果に加えて、この発明によれば、弾
性部材が異常温度で熱変形することで、温度ヒューズが
加熱部材に近づくので、温度ヒューズを溶断するのにか
かる時間を短くなり、定着装置の異常事態を早い時期に
解除することもできる。 As described above, according to the present invention, when the temperature fuse is installed, the distance between the temperature fuse and the fixing roller can be adjusted to be constant. The temperature at which the product reacts is constant, and with a simple structure, any product can function to prevent overheating in a certain temperature range. In addition to the effect, according to the present invention,
The thermal deformation of the conductive material at abnormal temperature
As it approaches the heating element, it may be necessary to blow the thermal fuse.
This shortens the time required to fix abnormalities in the fixing device early.
You can also cancel it.
【００１２】[0012]
【図１】定着装置の概略図である。FIG. 1 is a schematic diagram of a fixing device.
【図２】本願定着装置の過昇温防止部の一実施例を示す
概略図である。FIG. 2 is a schematic view showing an embodiment of an excessive temperature rise prevention section of the fixing device of the present invention.
【図３】本願定着装置の過昇温防止部の一実施例を示す
斜視図である。FIG. 3 is a perspective view showing an embodiment of an excessive temperature rise prevention section of the fixing device of the present invention.
【図４】本願の距離調整部の拡大図である。FIG. 4 is an enlarged view of a distance adjustment unit of the present application.
４ 温度ヒュ−ズ ９ 温度保持部材 １０ ブラケット １１ 板バネ １２ ねじ １４枠体 Reference Signs List 4 temperature fuse 9 temperature holding member 10 bracket 11 leaf spring 12 screw 14 frame
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 13/20 G03G 15/20 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G03G 13/20 G03G 15/20
Claims (1)
定着トナー像を担持する記録紙上に加熱定着させる定着
装置であって、過昇温防止機能として前記加熱部材の近
傍に設けられ周囲が異常温度になると前記熱源を遮断す
る温度ヒューズを備えた定着装置において、前記温度ヒューズを固定するブラケット と、前記加熱部
材が配置される側から前記ブラケットを弾性力によって
鉛直上方向に支持し、周囲が異常温度になると熱変形を
行う樹脂を使用した弾性部材と、前記温度ヒューズと前
記加熱部材との距離を調整する調整部材とからなる温度
ヒューズ保持部材を設けることを特徴とする定着装置。1. A fixing device for heating and fixing an unfixed toner image on recording paper by a heating member heated by a heat source, wherein the fixing device is provided in the vicinity of the heating member as an overheating prevention function and the surrounding area is at an abnormal temperature. in the fixing device provided with a thermal fuse that blocks the heat source and become, a bracket for fixing the temperature fuse, the heating unit
From the side where the material is placed by the elastic force
It is supported vertically upward, and when the surrounding temperature becomes abnormal, thermal deformation will occur.
Elastic member using resin, and the thermal fuse and the front
A fixing device comprising a temperature fuse holding member including an adjusting member for adjusting a distance from the heating member .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24463993A JP3241895B2 (en) | 1993-09-30 | 1993-09-30 | Fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24463993A JP3241895B2 (en) | 1993-09-30 | 1993-09-30 | Fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07104597A JPH07104597A (en) | 1995-04-21 |
| JP3241895B2 true JP3241895B2 (en) | 2001-12-25 |
Family
ID=17121746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24463993A Expired - Fee Related JP3241895B2 (en) | 1993-09-30 | 1993-09-30 | Fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3241895B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161822B (en) * | 2019-04-30 | 2021-09-10 | 高德品创(山东)科技有限公司 | Thermal fuse mounting structure, thermal fuse assembly, fixing unit, and printer |
| CN111238675A (en) * | 2020-02-13 | 2020-06-05 | 山东仁丰特种材料股份有限公司 | Real-time online monitoring system for surface temperature of vat in electric workshop |
-
1993
- 1993-09-30 JP JP24463993A patent/JP3241895B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07104597A (en) | 1995-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |