JPS62242981A - Form peeling device in fixing device - Google Patents
Form peeling device in fixing deviceInfo
- Publication number
- JPS62242981A JPS62242981A JP8849986A JP8849986A JPS62242981A JP S62242981 A JPS62242981 A JP S62242981A JP 8849986 A JP8849986 A JP 8849986A JP 8849986 A JP8849986 A JP 8849986A JP S62242981 A JPS62242981 A JP S62242981A
- Authority
- JP
- Japan
- Prior art keywords
- peeling claw
- roller
- heating roller
- tip
- peeling
- 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
- 238000010438 heat treatment Methods 0.000 claims description 47
- 210000000078 claw Anatomy 0.000 abstract description 39
- 239000011800 void material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子写真複写機等の画像記録装置において、ト
ナー像を記録用紙等の像支持シート上に加熱定着するロ
ーラ定着装置に関し、特に該ローラ定着装置のローラ間
から後方に搬出される用紙の剥離装置に関するものであ
る。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a roller fixing device for heat-fixing a toner image onto an image support sheet such as a recording paper in an image recording apparatus such as an electrophotographic copying machine. This invention relates to a peeling device for paper that is carried out rearward from between the rollers of a roller fixing device.
複写機等の加熱ローラによる定着装置は、第６図に示す
ように、内部のヒータ１によって加熱された加熱ローラ
２と、該加熱ロー２２に圧接されて共に回転する押圧ロ
ーラ４とを備え、未定着トナーＴが付着した用紙Ｐｉ、
一対となっている加熱定着ローラ２と押圧ローラ２との
間を通し、熱及び圧力によりトナーＴｉ用紙Ｐへ融着さ
せ定着を行う。As shown in FIG. 6, a fixing device using a heating roller such as a copying machine includes a heating roller 2 heated by an internal heater 1, and a pressing roller 4 that is pressed against the heating roller 22 and rotates together. paper Pi to which unfixed toner T has adhered;
The toner is passed between a pair of heat fixing roller 2 and pressure roller 2, and is fused to Ti toner paper P by heat and pressure to perform fixation.
加熱ローラは溶融したトナーＴがこの加熱ローラ２に付
着しないように表面が離型性の高い材料、例えばＰＴＩ
；’１８ （ポリテトラフルオロエチレン）等の薄い膜
（厚さ数十μｍ）による離形性層３で被覆されている。The surface of the heating roller is made of a material with high releasability, such as PTI, so that the molten toner T does not adhere to the heating roller 2.
;'18 (polytetrafluoroethylene) or the like is coated with a mold release layer 3 made of a thin film (thickness of several tens of μm).
また押圧ローラ４は硬度６０°前後のシリコンゴム層５
で被覆され、加熱ローラ２に圧接されることによって４
〜８ｍｍ幅のニップ幅を形成している。In addition, the pressure roller 4 has a silicone rubber layer 5 with a hardness of around 60°.
4 by being coated with and pressed against the heating roller 2.
A nip width of ~8 mm is formed.
従来加熱ローラ２では金属の上にＰＴＦＥ等を被覆して
いたが、このような加熱ローラでは押圧ローラ４との間
に周速に多少のズレが生じ、トナー１ｌｉＩｉｉ像、特
に解像力及び黒地の再現性を劣化させたり、押圧ローラ
のみが変形するため、定着後の用紙Ｐのカールが大きく
なったりする欠点があった。このため加熱ローラ２の金
属とＰＴＦＢの間に帆１〜Ｑ、５ｍｍはどの耐熱ゴム、
例えばシリコンゴム、フッ素ゴム等を設け、前記欠点を
改良したものがある。Conventionally, the heating roller 2 has a metal coated with PTFE or the like, but such a heating roller causes some discrepancy in circumferential speed between it and the pressing roller 4, which affects the toner image, especially resolution and reproduction of black background. However, since only the pressure roller is deformed, the curl of the paper P after fixing increases. Therefore, what heat-resistant rubber should be used for sails 1 to Q, 5 mm between the metal of heating roller 2 and PTFB?
For example, there are devices that use silicone rubber, fluororubber, etc. to improve the above-mentioned drawbacks.
またこのような定着装置においては、トナーの粘着性に
より用紙Ｐが加熱ローラ２に巻き付いてしまうことがし
ばしば生じ、それを防止するために加熱ローラ２の軸方
向に複数個並べられた用紙剥離爪６が設けられている。In addition, in such a fixing device, the paper P often winds around the heating roller 2 due to the adhesiveness of the toner, and in order to prevent this, a plurality of paper peeling claws are arranged in the axial direction of the heating roller 2. 6 is provided.
このような剥離爪６は、回転軸８を中心にして回転可能
で、スプリング等によって数１０１以下の荷重で軽く加
熱定着ローラ２の表面に圧接している。こうして加熱ロ
ーラ２の回転により、加熱ローラ２と剥離爪６，７とが
こすれても、加熱ローラ２にはそれほど傷がつかない。Such a peeling claw 6 is rotatable around a rotating shaft 8, and is lightly pressed against the surface of the heat-fixing roller 2 by a spring or the like with a load of several hundred or less. In this way, even if the heating roller 2 and the peeling claws 6 and 7 rub against each other due to the rotation of the heating roller 2, the heating roller 2 is not seriously damaged.
しかしながら用紙Ｐに多量のトナーＴが付着している場
合、あるいは加熱ローラ２の離型性層３の離型性が低下
した場合などには、用紙Ｐが加熱ローラ２に強く巻き付
き、剥離爪６の先端に大きな荷重がかかってしまう。However, if a large amount of toner T adheres to the paper P, or if the releasability of the release layer 3 of the heating roller 2 is reduced, the paper P will be tightly wrapped around the heating roller 2 and the peeling claw 6 A large load is placed on the tip of the
特に複数個の剥離爪６のうち、用紙Ｐの一部のみ剥離し
た場合などには、剥離できなかった用紙Ｐに引きずられ
、剥離爪６の先端には非常に大きな荷重がかかってしま
う。また加熱ロー２２とその後の用紙排出ロー２８の間
で紙づまりを起こした場合ｆも、剥離爪６の先端には大
きな荷重がかかってしまう。そのような場合には、表面
の離型性層３がはがれたり、あるいは離型性層と金属の
間にゴム層がある場合には剥離爪６がゴム層へ喰い込み
ゴム層がはがしてしまうなどの欠点がある。In particular, if only a portion of the paper P is peeled off among the plurality of peeling claws 6, the tip of the peeling claw 6 will be dragged by the paper P that could not be peeled off, and a very large load will be applied to the tip of the peeling claw 6. Furthermore, if a paper jam occurs between the heating row 22 and the subsequent paper discharge row 28, a large load will be applied to the tip of the peeling claw 6. In such a case, the releasable layer 3 on the surface will peel off, or if there is a rubber layer between the releasable layer and the metal, the peeling claw 6 will dig into the rubber layer and peel it off. There are drawbacks such as.
本発明は上記欠点を解決するようにしたもので、定着装
置の加熱ローラに加熱により用紙Ｐが巻き付いたり、紙
づまりを生じた場合、この加熱ローラに圧接する剥離爪
６の回転軸７を移動させ、剥離爪の先端が加熱ローラ表
面から離れることによって、剥離爪の先端によるローラ
への傷を防止せんとするものである。The present invention is designed to solve the above-mentioned drawbacks, and when the paper P wraps around the heating roller of the fixing device due to heating or a paper jam occurs, the rotating shaft 7 of the peeling claw 6 that comes into pressure contact with the heating roller is moved. By moving the tip of the peeling nail away from the surface of the heating roller, the roller is prevented from being damaged by the tip of the peeling nail.
即ち、本発明は、回転可能な加熱ローラと、該加熱ロー
ラに圧接して回転する押圧ローラと、上記両ローラの後
方位置にあって両ローラ表面と圧接し得るように設けら
れた用紙剥離装置とを備えた定着装置において、一端が
前記少なくとも一方のローラに圧接し他端が移動可能な
第１の支軸に回転自在に支持さればね付勢された爪部材
と、一端に前記第１の支軸を有し他端が装置に固設され
た第２の支軸に回転自在に支持された支持部材とから成
ることを特徴とする定着装置における用紙剥離装置であ
る。That is, the present invention provides a rotatable heating roller, a pressing roller that rotates in pressure contact with the heating roller, and a paper peeling device provided at a rear position of both rollers so as to be able to press against the surfaces of both rollers. a fixing device comprising: a spring-biased claw member having one end in pressure contact with the at least one roller and the other end rotatably supported on a movable first support shaft; A paper peeling device in a fixing device characterized by comprising a support member having a support shaft and a support member rotatably supported by a second support shaft whose other end is fixed to the device.
第１図は本発明による用紙剥離装置を用いた加熱ロール
定着装置の構成図、第２図ないし第４図は本発明の剥離
爪の動作を詳細に示した図である。FIG. 1 is a block diagram of a heating roll fixing device using a paper peeling device according to the present invention, and FIGS. 2 to 4 are diagrams showing the operation of the peeling claw of the present invention in detail.
これら各図において、第６図と同一部分は同一の符号を
付して説明する。In each of these figures, the same parts as in FIG. 6 will be described with the same reference numerals.
第１図で加熱ロール定着装置は、既に述べたようにヒー
タｌで加熱された加熱ロー２２と、該加熱ロー２２に圧
接して共に回転する押圧ローラ４を備え、未定着のトナ
ーＴが付着した用紙Ｐｉこれら一対のロー２２，４の間
を通し、熱及び圧力によりトナーＴを用紙Ｐへ融着させ
定着する。そして定着された用紙Ｐは剥離爪（爪部材）
１１とガイド部材を通じて送りロー２８へと送り出され
る。In FIG. 1, the heating roll fixing device includes a heating row 22 heated by the heater 1, as described above, and a pressing roller 4 that is in pressure contact with the heating row 22 and rotates together, to which unfixed toner T adheres. The sheet Pi is passed between the pair of rows 22 and 4, and the toner T is fused and fixed to the sheet P by heat and pressure. Then, the fixed paper P is removed by a peeling claw (claw member)
11 and the guide member to the feed row 28.
この゛加熱ロー２２は、溶融したトナーＴが加熱ローラ
２の表面に付着しないようＰＴＩ’Ｅなどによる離型性
層３を設しである。また押圧ローラ４は硬度６０’前後
のシリコンゴムで被覆され、加熱ローラ２の表面に圧接
されることによって４〜３ｍｍ幅のニップ幅を形成して
いる。そして加熱ローラ２を用紙Ｐが通過する時、トナ
ーＴの粘着性などにより用紙４が加熱ローラ２に巻き付
くのを防止するため剥離爪１１ヲ設けである。この剥離
爪１１はその回転支軸１２に設けられたトルクばね１３
により、常に数１０．９以下の傷がつかない程度の荷重
で軽く加熱ロー２２の表面に圧接している。This heating roller 22 is provided with a releasable layer 3 made of PTI'E or the like so that the molten toner T does not adhere to the surface of the heating roller 2. The pressure roller 4 is coated with silicone rubber having a hardness of about 60', and is pressed against the surface of the heating roller 2 to form a nip width of 4 to 3 mm. A peeling claw 11 is provided to prevent the paper 4 from wrapping around the heating roller 2 due to the adhesiveness of the toner T when the paper P passes through the heating roller 2. This peeling claw 11 is connected to a torque spring 13 provided on its rotation support shaft 12.
Therefore, it is always lightly pressed against the surface of the heating row 22 with a load of several 10.9 or less that does not cause scratches.
次に、この剥離爪１１の構成と動作について説明する。Next, the structure and operation of this peeling claw 11 will be explained.
第２図において加熱ロー２２はその中心点Ｏｉ回転軸と
して用紙ｐｌ搬送する方向に回転する。また剥離爪１１
の先端部１１ Ａは、Ｄを接点として加熱ロー２２の表
面と接している。そして剥離爪１１の先端部１１ Ａと
接点りから回転軸Ｏへの直線とのなす接触角αは剥離爪
１１の先端部１１ Ａが加熱ローラ２の表面を傷つけな
いよう８５°〜９５°に選ばれている。In FIG. 2, the heating row 22 rotates in the direction of transporting the paper pl with its center point Oi as the rotation axis. Also, the peeling claw 11
The tip portion 11A is in contact with the surface of the heating row 22 using D as a contact point. The contact angle α between the tip 11A of the peeling claw 11 and the straight line from the contact point to the rotation axis O is set to 85° to 95° so that the tip 11A of the peeling claw 11 does not damage the surface of the heating roller 2. selected.
剥離爪１１は回転支軸１２の中心点８２回転軸として回
転することができる。The peeling claw 11 can rotate about the center point 82 of the rotation support shaft 12 as a rotation axis.
また回転支軸１２は回転支軸Ｉ４の中心点Ａ（ｉ−回転
軸として回転できるアーム部材１５の先端に取り付けら
れている。この回転支軸１４は本装置本体に固定されて
いる。そして本実施例では回転支軸１２に組み込まれた
トルクばね１３によ）、加熱ローラ２の回転方向とは逆
方向の回転力を受は加熱ローラ２の表面に軽く圧接して
いる。また回転支軸１２はアーム部材１５の回転によっ
てアーム部材１５ヲ半径とする鎖線で示した一定の円弧
ＢＣ上を動くことができる。しかし限定された円弧ＢＣ
以上は動くことができないようストッパ１６ 、１７で
規制されている。The rotation support shaft 12 is attached to the tip of an arm member 15 that can rotate as the center point A (i- rotation axis) of the rotation support shaft I4.The rotation support shaft 14 is fixed to the main body of the apparatus. In the embodiment, a torque spring 13 incorporated in the rotational support shaft 12 receives a rotational force in a direction opposite to the rotational direction of the heating roller 2, and is lightly pressed against the surface of the heating roller 2. Further, the rotation support shaft 12 can move on a constant circular arc BC shown by a chain line with the radius of the arm member 15 as the arm member 15 rotates. However, the limited arc BC
It is restricted by stoppers 16 and 17 so that it cannot move beyond this point.
この回転中心Ｂの通常の位置は回転中心Ｂと接点りの間
で任意に選べるが、好ましくは接点りと回転中心Ａｉ結
ぶ直線より上方に位置することが好ましい。また０点は
図の鎖線で示すよって回転中心Ｏｆ中心として、回転中
心Ｂと０間の距＃を半径とする円弧と、回転中心Ａｉ中
心にアーム１５を半径とする円弧との交点であるように
構成されている。The normal position of this rotation center B can be arbitrarily selected between the rotation center B and the contact point, but it is preferably located above the straight line connecting the contact point and the rotation center Ai. Also, the 0 point is indicated by the chain line in the figure, so it seems to be the intersection of a circular arc whose radius is the distance # between the rotation center B and 0, with the rotation center Of as the center, and an arc whose radius is the arm 15 and the rotation center Ai. It is composed of
紙づまシが発生すると、剥離爪１１が加熱ロー２２の表
面上に強く押しつけられようとする。しかし同時にアー
ム部材１５はトルクばね１３に抗して上方に回転する。When a paper jam occurs, the peeling claw 11 tends to be strongly pressed onto the surface of the heating row 22. However, at the same time, the arm member 15 rotates upward against the torque spring 13.
即ちアーム部材１５の先端にある回転中心Ｂは円弧ＢＣ
上を０点の方向に移動する。That is, the rotation center B at the tip of the arm member 15 is an arc BC.
Move the top in the direction of the 0 point.
このことによって、第３図と第４図に示すようにアーム
部材１５と剥離爪１１は上方に移動する。また剥離爪１
１と加熱ローラ２の表面との接点りでは過大な力が加わ
ることを防ぐとともに、剥離爪１１の先端部１１Ａは加
熱ローラ２の表面から離れ、空隙］）／１形成する。こ
れによシ剥離爪１１による加熱ローラ２の表面への傷を
防止することが可能となる。As a result, the arm member 15 and the peeling claw 11 move upward as shown in FIGS. 3 and 4. Also, peeling nail 1
1 and the surface of the heating roller 2, and the tip 11A of the peeling claw 11 is separated from the surface of the heating roller 2, forming a gap ])/1. This makes it possible to prevent the surface of the heating roller 2 from being damaged by the peeling claw 11.
またこれらの剥離爪１１やアーム部材１５は従来用いら
れていたと同様の金属材料などによって構成することが
できる。Further, these peeling claws 11 and arm members 15 can be made of the same metal materials as those conventionally used.
本発明は加熱ローラ２に対する傷防止のみならず、押圧
ローラ３に対する剥離爪１８などに対しても同様の利用
が可能であり、押圧ローラＩ８に対してももちろん同様
の効果をもたらす。The present invention can be used not only for preventing scratches on the heating roller 2, but also for the peeling claw 18 on the pressure roller 3, and of course brings about the same effect on the pressure roller I8.
以上説明したように、本発明による用紙剥離装置は、そ
の剥離爪の回転軸を円弧上に移動させることで目的を達
成するもので、しかも簡単な構造であり、従来と同じ材
料と加工技術により部品点数も少く、安価に装置を組立
てることもできる。As explained above, the paper peeling device according to the present invention achieves its purpose by moving the rotation axis of its peeling claw on an arc, and has a simple structure and uses the same materials and processing technology as before. The number of parts is small, and the device can be assembled at low cost.
これてよシ紙づまシが発生した場合でも剥離爪によって
加熱ローラの表面に傷をつけることなく常に安定に作動
する用紙剥離装置を提供することができるようになった
。This makes it possible to provide a paper peeling device that always operates stably without damaging the surface of the heating roller with the peeling claw even when a paper jam occurs.
第１図は本発明を用いた加熱ローラ定着装置の構成図、
第２図および第４図は本発明である用紙剥離装置の構成
及び剥離爪の動作を示した図である。
第３図及び第５図は紙づまりを生じた場合の剥離爪を中
心とした動作と効果を示した図である。
また第６図は従来技術による用紙剥離装置の構成図であ
る。FIG. 1 is a configuration diagram of a heating roller fixing device using the present invention;
2 and 4 are diagrams showing the structure of the paper peeling device according to the present invention and the operation of the peeling claw. FIGS. 3 and 5 are diagrams showing the operations and effects of the peeling claw when a paper jam occurs. Further, FIG. 6 is a configuration diagram of a paper peeling device according to the prior art.
Claims (1)
する押圧ローラと、上記両ローラの後方位置にあって両
ローラ表面と圧接し得るように設けられた用紙剥離装置
とを備えた定着装置において、一端が前記少なくとも一
方のローラに圧接し他端が移動可能な第１の支軸に回転
自在に支持さればね付勢された爪部材と、一端に前記第
１の支軸を有し他端が装置に固設された第２の支軸に回
転自在に支持された支持部材とから成ることを特徴とす
る定着装置における用紙剥離装置。A fixing device that includes a rotatable heating roller, a pressure roller that rotates in pressure contact with the heating roller, and a paper peeling device that is provided at a rear position of both rollers so as to be in pressure contact with the surfaces of both rollers. a spring-biased pawl member having one end in pressure contact with the at least one roller and the other end rotatably supported on a movable first support shaft; A paper peeling device in a fixing device, comprising a support member whose end is rotatably supported by a second support shaft fixed to the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8849986A JPS62242981A (en) | 1986-04-15 | 1986-04-15 | Form peeling device in fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8849986A JPS62242981A (en) | 1986-04-15 | 1986-04-15 | Form peeling device in fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62242981A true JPS62242981A (en) | 1987-10-23 |
Family
ID=13944512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8849986A Pending JPS62242981A (en) | 1986-04-15 | 1986-04-15 | Form peeling device in fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62242981A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105228A (en) * | 1989-03-07 | 1992-04-14 | Kabushiki Kaisha Toshiba | Fixing unit having separating claws movable with the opening and closing of the claw shell housing |
| JP2012012204A (en) * | 2010-07-05 | 2012-01-19 | Sharp Corp | Sheet separation mechanism and image forming apparatus |
| JP2012220720A (en) * | 2011-04-08 | 2012-11-12 | Sharp Corp | Peeling device and image forming apparatus using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441739A (en) * | 1977-09-09 | 1979-04-03 | Canon Inc | Fixing device |
| JPS5842078A (en) * | 1981-09-04 | 1983-03-11 | Canon Inc | Fixing device |
| JPS61200564A (en) * | 1985-03-04 | 1986-09-05 | Fuji Xerox Co Ltd | Form separating device for fixing device |
-
1986
- 1986-04-15 JP JP8849986A patent/JPS62242981A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441739A (en) * | 1977-09-09 | 1979-04-03 | Canon Inc | Fixing device |
| JPS5842078A (en) * | 1981-09-04 | 1983-03-11 | Canon Inc | Fixing device |
| JPS61200564A (en) * | 1985-03-04 | 1986-09-05 | Fuji Xerox Co Ltd | Form separating device for fixing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105228A (en) * | 1989-03-07 | 1992-04-14 | Kabushiki Kaisha Toshiba | Fixing unit having separating claws movable with the opening and closing of the claw shell housing |
| JP2012012204A (en) * | 2010-07-05 | 2012-01-19 | Sharp Corp | Sheet separation mechanism and image forming apparatus |
| JP2012220720A (en) * | 2011-04-08 | 2012-11-12 | Sharp Corp | Peeling device and image forming apparatus using the same |
| US9063503B2 (en) | 2011-04-08 | 2015-06-23 | Sharp Kabushiki Kaisha | Separating device |
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