JPH01252986A - Fixing device - Google Patents
Fixing deviceInfo
- Publication number
- JPH01252986A JPH01252986A JP7806188A JP7806188A JPH01252986A JP H01252986 A JPH01252986 A JP H01252986A JP 7806188 A JP7806188 A JP 7806188A JP 7806188 A JP7806188 A JP 7806188A JP H01252986 A JPH01252986 A JP H01252986A
- Authority
- JP
- Japan
- Prior art keywords
- fixing
- roller
- fixing roller
- release agent
- contact
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims description 37
- 238000000576 coating method Methods 0.000 claims description 37
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000006082 mold release agent Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 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
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 etc. Chemical compound 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004073 vulcanization Methods 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】
、 １
本発明は、複写機及びレーザビームプリンタ等の画像記
録装置に使用される定着用回転体を備えた定着装置に関
するものであり、特に定着用回転体の表面上にＩｔｆｆ
ｉ剤を塗布する塗布装置が設けられた定着装置に関する
ものである。Detailed Description of the Invention: 1. The present invention relates to a fixing device equipped with a fixing rotor used in image recording devices such as copying machines and laser beam printers. Itff to
The present invention relates to a fixing device equipped with a coating device for coating an i-agent.
Ｌ久立且遣
従来の、例えば電子写真方式の複写機等に使用される、
定着用回転体の表面上へ離型剤を塗布する塗布装置を有
する定着装置は、第３図に示されるような構成とされる
。Used in conventional, for example, electrophotographic copying machines, etc.
A fixing device having a coating device for coating a release agent onto the surface of a fixing rotating body has a configuration as shown in FIG.
簡単に説明すると、定着装置は２本例ではロール状とさ
れる定着用回転体（定着ローラ）１と加圧用弾性回転体
（加圧ローラ）４の一対のローラより構成され、定着ロ
ーラ１はアルミニウム、鉄等の中空芯金２の表層部に室
温加硫型シリコーンゴム３を被覆することにより形成さ
れている。Briefly, the fixing device is composed of a pair of rollers, a rotating member for fixing (fixing roller) 1 and an elastic rotating member for pressing (pressure roller) 4, which are roll-shaped in this example. It is formed by coating the surface layer of a hollow core metal 2 made of aluminum, iron, etc. with room temperature vulcanizable silicone rubber 3.
又、定着ローラ１の内部にはハロゲンランプ等のヒータ
７が配置されており、定着ローラ１を加熱する働きをな
す。Further, a heater 7 such as a halogen lamp is disposed inside the fixing roller 1, and serves to heat the fixing roller 1.
一方、加圧ローラ４は、鉄やステンレス等の芯金６の上
部に高温加硫室シリコーンゴムを形成し表層部にフッ素
コーティングが施されている。本例では加圧ローラ４の
内部にもハロゲンランプ等のヒータ７が配置されている
。On the other hand, the pressure roller 4 has a high-temperature vulcanization chamber silicone rubber formed on the top of a core metal 6 made of iron, stainless steel, etc., and a fluorine coating is applied to the surface layer. In this example, a heater 7 such as a halogen lamp is also arranged inside the pressure roller 4.
定着ローラ１と、加圧ローラ４とは、お互いがバネ等の
抑圧手段（図示せず）により互いに圧接されている。The fixing roller 1 and the pressure roller 4 are pressed against each other by a suppressing means (not shown) such as a spring.
定着装置には更にサーミスタ等の感温素子１９が設けら
れ、本例では加圧ローラ４の表面温度を測定することに
より定着ローラ１の表面温度を検知するように構成され
ている。従って、定着ローラ１の表面温度は、この感温
素子１９及び温度調節回路（図示せず）を介してヒータ
への電圧を制御することにより所定設定値に制御される
。The fixing device is further provided with a temperature sensing element 19 such as a thermistor, and is configured to detect the surface temperature of the fixing roller 1 by measuring the surface temperature of the pressure roller 4 in this example. Therefore, the surface temperature of the fixing roller 1 is controlled to a predetermined set value by controlling the voltage to the heater via the temperature sensing element 19 and a temperature control circuit (not shown).
当業者には周知の方法にて形成されたトナー像１６を有
した転写材Ｐは、入口ガイド８ａにより定着ローラｌと
加圧ａ−ラ４の間へと導入され、転写材Ｐ上のトナー像
１６は定着ローラ１と加圧ローラ４の間で加圧および加
熱されて定着される。定着後の転写材Ｐは出口ガイド８
ｂにて機外へと案内される。又、定着ローラ１にはクリ
ーナ９が設けられ、定着ローラｌの表面上に付着したト
ナーや紙粉をクリーニングする。The transfer material P having the toner image 16 formed by a method well known to those skilled in the art is introduced between the fixing roller l and the pressure roller 4 by the entrance guide 8a, and the toner image on the transfer material P is The image 16 is fixed by being pressed and heated between the fixing roller 1 and the pressure roller 4. The transfer material P after fixing is placed in the exit guide 8.
You will be guided out of the aircraft at b. Further, the fixing roller 1 is provided with a cleaner 9 for cleaning toner and paper powder adhering to the surface of the fixing roller l.
従来、定着装置には定着ローラ１の表面に離覆剤を塗布
する離型剤塗布装置１０が設けられている。該離型剤塗
布装置１０は、支持部材１３にて回転自在に保持され、
そして互いに当接して回転駆動される第１の回転体１２
と第２の回転体１１とを備えた塗布手段を有する６本例
で第１の回転体１２は金属製ローラとされ、第２の回転
体１１は高温加硫型シリコーンゴムを表面層に被覆した
ローラとされる。前記第１のローラ１２の一部は離型剤
槽１４内の離型剤１５中に浸漬されている。Conventionally, a fixing device is provided with a release agent coating device 10 that applies a release agent to the surface of a fixing roller 1. The release agent application device 10 is rotatably held by a support member 13,
The first rotating bodies 12 are driven to rotate while coming into contact with each other.
In this example, the first rotating body 12 is a metal roller, and the second rotating body 11 has a surface layer coated with high temperature vulcanizable silicone rubber. It is said to be a roller. A portion of the first roller 12 is immersed in a mold release agent 15 in a mold release agent tank 14 .
定着ローラ１の表面に離型剤１５を塗布させるには、離
型剤１５を第１のローラ１２から第２のローラ１１へ転
着させて行う、第２のローラ１１への離型剤１５の塗布
量はブレード１７にて調整される。In order to apply the release agent 15 to the surface of the fixing roller 1, the release agent 15 is transferred from the first roller 12 to the second roller 11. The amount of coating is adjusted by the blade 17.
塗布装置ｌＯの前記ローラ支持部材１３にはバネ部材２
３と回転体接離装置１８が接続され、第２のローラ１１
表面と定着用回転体１の表面とを接離させる働きを行う
。A spring member 2 is attached to the roller support member 13 of the coating device IO.
3 and the rotating body contact/separation device 18 are connected, and the second roller 11
It functions to bring the surface into contact with and away from the surface of the fixing rotating body 1.
第２のローラ１１は、バネ部材２３の作用にて転写材Ｐ
が定着ローラ１と加圧ローラ４との間へ挿入される約３
回転前に定着ローラ１の表面へと接触し、転写材が排紙
されて約１回転後に、回転体接触装置１８にて定着ロー
ラ１の表面から離脱するように接離制御されている。The second roller 11 moves the transfer material P by the action of the spring member 23.
is inserted between the fixing roller 1 and the pressure roller 4.
Before rotation, the transfer material contacts the surface of the fixing roller 1, and after about one rotation after the transfer material is ejected, it is controlled to come into contact with and separate from the surface of the fixing roller 1 by the rotary contact device 18.
このように制御することにより、離型剤１５は、転写材
Ｐを定着ローラ１と加圧ローラ４との間に挿入されるま
でに、第２のローラ１１と定着口〜うｌとが接触２回転
することにより、定着ローラ１の表面上に均一に塗布さ
れる。By controlling in this manner, the release agent 15 is applied so that the second roller 11 and the fixing port come into contact with each other before the transfer material P is inserted between the fixing roller 1 and the pressure roller 4. By rotating twice, the surface of the fixing roller 1 is uniformly coated.
しかしながら、従来の定着装置に用いられる離型剤の塗
布装置１０は、上述のように、第２のローラ１１が定着
ローラ１と非接触である場合が設定されており、この間
に定着ローラｌは内部のヒータ７により加熱されて、第
２のローラ１１との温度差が大きくなり、第４図に示さ
れるように、再度第２のローラ１１が定着ローラ１に接
触した時点で定着ローラ１の温度を低下させた。この結
果、定着ローラ１は未定着トナー１６を転写材Ｐに定着
するに十分な温度が得られず、定着不良を起こすことが
あった。However, as described above, the release agent applicator 10 used in the conventional fixing device is set so that the second roller 11 is not in contact with the fixing roller 1, and during this time, the fixing roller l is It is heated by the internal heater 7, and the temperature difference between it and the second roller 11 increases, and as shown in FIG. Reduced temperature. As a result, the fixing roller 1 could not obtain a temperature sufficient to fix the unfixed toner 16 to the transfer material P, which could cause fixing failure.
又塗布装置１０には、転写材Ｐに転着する量に関して温
度依存性のあるものもある。このような塗布装置を用い
た時に、連続して定着作動を行なったことにより塗布装
置の温度が高くなった場合と、前の塗布作動から時間経
過することにより塗布装置の温度が低くなった場合とで
は、離型剤の粘度の温度変化が生じ、転写材に転着した
離型剤のオイルの量が一定にならず、転写材上への塗布
むらが発生するようになる。Further, some coating devices 10 have temperature dependence in terms of the amount transferred onto the transfer material P. When using such a coating device, if the temperature of the coating device becomes high due to continuous fixing operation, or if the temperature of the coating device becomes low due to the passage of time from the previous coating operation. In this case, the viscosity of the release agent changes with temperature, and the amount of oil in the release agent transferred to the transfer material is not constant, resulting in uneven coating on the transfer material.
本発明の目的は、定着用回転体を備えた定着装置に用い
られる塗布装置の問題点を解決するために、定着装置に
使用される定着用回転体へ離型剤を塗布する場合の定着
用回転体の温度変化をなくして離型剤の一定量を定着用
回転体へ塗布させ、転写材上への塗布むらをなくし、又
未定着トナーが転写材に安定して定着される塗布装置を
備えた定着装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of a coating device used in a fixing device equipped with a fixing rotor, and to solve the problems of a fixing device used in a fixing device when applying a release agent to a fixing rotor used in a fixing device. A coating device that eliminates temperature changes in the rotating body, applies a constant amount of release agent to the fixing rotating body, eliminates uneven coating on the transfer material, and stably fixes unfixed toner to the transfer material. An object of the present invention is to provide a fixing device with the following features.
−め
上記目的は本発明にて達成される。要約すれば本発明は
、少なくとも定着用回転体を備え、該定着用回転体にて
記録材上に定着画像を形成させる定着装置において、前
記定着用回転体に接触および非接触状態に移動可能であ
り、且つ前記定着用回転体表面に離型剤を塗布すること
のできる塗布装置を具備し、該塗布装置は定着用回転体
の回転停止時には前記定着用回転体の表面に接触してい
ることを特徴とする定着装置である。- The above objects are achieved by the present invention. In summary, the present invention provides a fixing device that includes at least a fixing rotary body and forms a fixed image on a recording material with the fixing rotary body, which is movable into and out of contact with the fixing rotary body. and a coating device capable of applying a release agent to the surface of the fixing rotor, the coating device being in contact with the surface of the fixing rotor when the rotation of the fixing rotor is stopped. This fixing device is characterized by:
支ムｊ
次に本発明に係る定着装置を図面に則して更に詳しく説
明する。Support j Next, the fixing device according to the present invention will be explained in more detail with reference to the drawings.
第１図に本発明に係る定着装置の一実施例が示されるが
、本実施例の定着装置は第３図に関連して説明した定着
装置と同じ構成とされる。つまり、定着装置は、ロール
状とされる定着用回転体（定着ローラ）ｌと加圧用弾性
回転体（加圧ローラ）４の一対のローラより構成され、
定着ローラ１には塗布装置１０により離型剤１５が塗布
される。FIG. 1 shows an embodiment of the fixing device according to the present invention, and the fixing device of this embodiment has the same configuration as the fixing device described in connection with FIG. 3. That is, the fixing device is composed of a pair of rollers, a roll-shaped fixing rotating body (fixing roller) 1 and a pressing elastic rotating body (pressing roller) 4.
A release agent 15 is applied to the fixing roller 1 by a coating device 10 .
塗布装置も第３図に関連して説明した塗布装置と同じ構
成とされる。つまり、塗布装置１０は、支持部材１３に
て回転自在に保持され、そして互いに当接して回転駆動
される第１の回転体１２と第２の回転体１１とを備えて
いる０本実施例でも第１の回転体１２は金属製ローラと
され、第１の回転体１１は高温加硫型シリコーンゴムを
表面層に被覆したローラとされる。前記第１のローラ１
２の一部は離型剤槽１４内の離型剤１５中に浸漬される
。The coating device also has the same configuration as the coating device described in connection with FIG. In other words, the coating device 10 is rotatably held by a support member 13 and includes a first rotary body 12 and a second rotary body 11 that are rotated while in contact with each other. The first rotating body 12 is a metal roller, and the first rotating body 11 is a roller whose surface layer is coated with high temperature vulcanizable silicone rubber. Said first roller 1
2 is partially immersed in the mold release agent 15 in the mold release agent tank 14.
定着ローラｌの表面に離型剤１５を塗布させるには、離
型剤１５を第１のローラ１２から第２のローラ１１へ転
着させて行い、第２のローラ１１への離型剤１５の塗布
量はブレード１７にて調整される。In order to apply the release agent 15 to the surface of the fixing roller l, the release agent 15 is transferred from the first roller 12 to the second roller 11, and the release agent 15 is applied to the second roller 11. The amount of coating is adjusted by the blade 17.
塗布装置１０の前記ローラ支持部材１３には。For the roller support member 13 of the coating device 10.
従来と同様にバネ部材２３と回転体接離装置１８とが接
続される。The spring member 23 and the rotating body contact/separation device 18 are connected as in the conventional case.
従来用いられている手段により画像形成されたトナー像
１６を担持した転写材Ｐは、入口ガイド８ａから定着ロ
ーラｌ及び加圧ローラ４の間へ搬送される０本実施例で
は、転写材Ｐが定着ローラｌ及び加圧ローラ４の間へ進
入する約３回転前に、第２のローラ１１が定着ローラ１
に離型剤１５を塗布する構成とされた。この塗布された
離型剤１５は、定着ローラｌ及び加圧ローラ４の回転に
より転写材Ｐがローラｌ、４の間へ進入するまでに、定
着用ローラｌの表面上に均一に塗布される。The transfer material P carrying the toner image 16 formed by conventional means is conveyed from the entrance guide 8a to between the fixing roller l and the pressure roller 4. In this embodiment, the transfer material P is Approximately 3 rotations before the second roller 11 enters between the fixing roller l and the pressure roller 4, the second roller 11
The mold release agent 15 was applied to the mold. The applied release agent 15 is uniformly applied onto the surface of the fixing roller l before the transfer material P enters between the rollers l and 4 due to the rotation of the fixing roller l and the pressure roller 4. .
転写材Ｐは、加熱された、離型剤を表面上へ塗布された
定着ローラｌと加圧ローラ４との間を通過させ定着され
る。転写材Ｐを通過させた後に約１回転させ、第２のロ
ーラ１１は定着ローラ１から離脱される。このような構
成は従来と同様である。The transfer material P is fixed by passing between a heated fixing roller l whose surface is coated with a release agent and a pressure roller 4. After passing the transfer material P, the second roller 11 is separated from the fixing roller 1 after about one rotation. Such a configuration is the same as the conventional one.
本発明によれば、第２のローラ１１は、定着ローラ１が
回転停止した場合においては定着ローラｌと接触状態に
もたらされる。このとき第１及び第２のローラ１２．１
１は停止状態である。この結果、第２のローラ１１の温
度と定着ローラｌの温度は等しく保たれ、離型剤１５を
定着ローラｌの表面上へ塗布した時に生じる定着ローラ
１の温度の低下がなくなり、オフセットが防止された。According to the invention, the second roller 11 is brought into contact with the fixing roller l when the fixing roller 1 stops rotating. At this time, the first and second rollers 12.1
1 is a stopped state. As a result, the temperature of the second roller 11 and the temperature of the fixing roller l are kept equal, eliminating the drop in temperature of the fixing roller 1 that occurs when the release agent 15 is applied onto the surface of the fixing roller l, and preventing offset. It was done.
又、コピーボタンをＯＮとしたと同時に第２のローラ１
１を定着ローラ１から離脱させ、上述した如くに、定着
ローラ１および加圧ローラ４との間へ転写材１６を進入
させる約３回転前に、第２のローラ１１と定着ローラｌ
とは接触され、排紙後、約１回転して第２のローラ１１
が定着ローラ１から離脱し、定着ローラｌが回転停止し
た場合には第２のローラ１１は定着ローラｌと接触状態
にもたらされる。Also, when the copy button is turned on, the second roller 1
1 from the fixing roller 1, and before the transfer material 16 enters between the fixing roller 1 and the pressure roller 4 about three rotations, the second roller 11 and the fixing roller
is in contact with the second roller 11, and after the sheet is ejected, it rotates about one time and then moves to the second roller 11.
When the second roller 11 is separated from the fixing roller 1 and the fixing roller l stops rotating, the second roller 11 is brought into contact with the fixing roller l.
このような塗布装置を備えた定着装置においては、第５
図に図示されるように、定着ローラｌと第２のローラ１
１との間での離型剤１５を塗布する前後における温度変
化がほとんどない。In a fixing device equipped with such a coating device, the fifth
As shown in the figure, the fuser roller l and the second roller 1
There is almost no temperature change between before and after applying the mold release agent 15.
次に、塗布装置の他の実施例を第２図にて説明する。Next, another embodiment of the coating device will be described with reference to FIG.
本実施例にて、離型剤１５は離型剤槽１４に入れてあり
、支持板２１に保持されたフェルト２２によって離型剤
Ｎ１４から吸い上げられ、駆動手段２０にてフェルト２
２と定着ローラ１との接離がなされる。フェルト支持板
２１は支持軸２３にて揺動自在に担持され、バネ２３に
て通常はフェルト２２が定着ローラ１へと接触されるよ
うに構成されている。In this embodiment, the mold release agent 15 is placed in the mold release agent tank 14, is sucked up from the mold release agent N14 by the felt 22 held on the support plate 21, and is transferred to the felt 2 by the driving means 20.
2 and the fixing roller 1 are brought into contact with and separated from each other. The felt support plate 21 is swingably supported by a support shaft 23, and the felt 22 is normally brought into contact with the fixing roller 1 by a spring 23.
離型剤１５は、フェルト２２により吸上げられ、転写材
１６を定着ローラｌと加圧ローラ４との間を通過させる
約３回転前に定着ローラの内部に設けられたヒータ７に
より所定温度を加熱された定着ローラｌの表面上へと塗
布される。このようにして定着ａ−ラｌの表面上に塗布
されたｆａ型剤１５は転写材Ｐを定着ローラ１と加圧ロ
ーラ４との間に進入させる前までに回転させて定着ロー
ラ１の表面上に均一に塗布される。トナー像を担持した
転写材Ｐは、加熱され、且つ離型剤１５が塗布された定
着ローラ１と加圧ローラ４との間に進入され、良好な定
着が行なわれる。The release agent 15 is sucked up by the felt 22 and heated to a predetermined temperature by a heater 7 provided inside the fixing roller before the transfer material 16 is passed through between the fixing roller l and the pressure roller 4 about three rotations. It is applied onto the surface of the heated fixing roller l. The fa type agent 15 coated on the surface of the fixing roller 1 in this way is rotated before the transfer material P enters between the fixing roller 1 and the pressure roller 4, and the surface of the fixing roller 1 is Spread evenly on top. The transfer material P carrying the toner image is heated and introduced between the fixing roller 1 and the pressure roller 4 coated with a release agent 15, and good fixing is performed.
本発明に従えば、定着ローラ１が回転停止された場合に
は、該定着ローラ１にフェルト２２を接触させる。この
結果、フェルト２２と定着ローラ１との温度差はほとん
どなくなり、定着ローラｌの温度低下を防ぐことができ
る。この時の定着ローラ１とフェルト２２との温度変化
は、第５図に示されたような上記実施例に係る第２のロ
ーラ１１の温度変化とほとんど同じであった。According to the present invention, when the rotation of the fixing roller 1 is stopped, the felt 22 is brought into contact with the fixing roller 1. As a result, the temperature difference between the felt 22 and the fixing roller 1 is almost eliminated, and a drop in temperature of the fixing roller 1 can be prevented. The temperature change between the fixing roller 1 and the felt 22 at this time was almost the same as the temperature change of the second roller 11 according to the above embodiment as shown in FIG.
本実施例で使用されるフェルト２２は、熱伝導性の良好
のものが好ましく、例えば銅等の金属をフェルトに混入
したもの等が良い。The felt 22 used in this embodiment is preferably one with good thermal conductivity, such as one in which a metal such as copper is mixed into the felt.
本発明における定着装置の塗布装置ｉｏとしては、熱伝
導性の良い塗布手段を使用して、常に定着口〜う１と同
等な温度を保つものである。特に、カラー画像形成装置
においては、トナー層がマゼンタ、イエロー及びシアン
の３層及びそれ以上の層と成るため、その全ての層のト
ナーを完全に定着しなければならない、従って、定着ロ
ーラ１の温度は常に一定に保つ必要がある。又、定着ロ
ーラｌの温度の低下による影響は大きく、定着不良等の
原因となる。The coating device io of the fixing device according to the present invention uses coating means with good thermal conductivity and always maintains the same temperature as the fixing port -1. In particular, in a color image forming apparatus, the toner layer consists of three or more layers of magenta, yellow, and cyan, and the toner of all the layers must be completely fixed. The temperature must always be kept constant. In addition, a decrease in the temperature of the fixing roller l has a large effect, causing fixing failure and the like.
更に、第２０−ラ１１やフェルト２２等の塗布手段は、
定着後、次の定着作動が行なわれるまでの間の定着ロー
ラ１の遊動回転時には接触させない方がよい、これは、
斯る塗布手段を回転中の定着ローラ１に塗布すると、定
着ローラｌに離型剤１５が無駄な量転着され、一定でな
い離型剤１５の塗布や塗布むら等が発生することとなる
からである。Furthermore, the application means for the 20th roller 11, felt 22, etc.
After fixing, it is better not to make contact with the fixing roller 1 during idle rotation until the next fixing operation is performed.
If such an application means is applied to the rotating fixing roller 1, an unnecessary amount of the release agent 15 will be transferred to the fixing roller l, resulting in uneven application of the release agent 15 or uneven application. It is.
発」Ｌの」Ｌ困
本発明に係る定着装置は、以上説明したように、離型剤
塗布装置の接離動作の時期が従来の装置とは異なる構成
とされるので、定着装置に使用される定着用回転体へ離
型剤を塗布する場合の定着用回転体の温度変化をなくし
て離型剤の一定量を定着用回転体へ塗布させることがで
き、従って転写材上への離型剤の塗布むらをなくし、又
未定着トナーを転写材に安定して定着させることができ
るという特長を有する。As explained above, the fixing device according to the present invention has a structure different from that of conventional devices in that the timing of the contact and separation operations of the release agent applicator is different from that of conventional devices. It is possible to apply a constant amount of release agent to the fixing rotor by eliminating the temperature change of the fixing rotor when applying the release agent to the fixing rotor, which makes it possible to release the mold onto the transfer material. It has the advantage of eliminating uneven application of the agent and stably fixing unfixed toner to the transfer material.
第１図は、本発明に係る定着装置の一実施例を示す概略
断面図で、定着用回転体の回転停止時を示したものであ
る。
第２図は、本発明に係る定着装置の他の実施例を示す概
略断面図で、定着用回転体の回転停止時を示したもので
ある。
第３図は、従来の定着装置の概略断面図で、定着用回転
体の回転停止時を示したものである。
第４図は、従来の定着用回転体と塗布装置の温度変化を
示した図である。
第５図は１本発明を実施した場合の定着用回転体と塗布
装置の温度変化を示した図である。
１：定着用回転体
４：加圧用弾性回転体
１１：塗布装置の第２の回転体
１２：塗布装置の第１の回転体
１５：ｆｌｌ型剤
１８．２０：塗布手段回転体接離装置
２１：フェルトの支持部材
２２：フェルト
２３：バ ネ
２４：回転支持軸
第１図
６ コ
第２図
第３図FIG. 1 is a schematic cross-sectional view showing an embodiment of the fixing device according to the present invention, and shows a state in which the rotation of the fixing rotor is stopped. FIG. 2 is a schematic cross-sectional view showing another embodiment of the fixing device according to the present invention, and shows the fixing rotor when the rotation is stopped. FIG. 3 is a schematic cross-sectional view of a conventional fixing device, showing the fixing rotor when the rotation is stopped. FIG. 4 is a diagram showing temperature changes in a conventional fixing rotating body and coating device. FIG. 5 is a diagram showing temperature changes in the fixing rotor and the coating device when one embodiment of the present invention is implemented. 1: Fixing rotating body 4: Elastic rotating body for pressing 11: Second rotating body of the coating device 12: First rotating body of the coating device 15: Full molding agent 18. 20: Coating means rotating body contacting and separating device 21 : Felt support member 22: Felt 23: Spring 24: Rotation support shaft Fig. 1 6 Fig. 2 Fig. 3
Claims (1)
て記録材上に定着画像を形成させる定着装置において、
前記定着用回転体に接触及び非接触状態に移動可能であ
り、且つ前記定着用回転体表面に離型剤を塗布すること
のできる塗布装置を具備し、該塗布装置は定着用回転体
の回転停止時には前記定着用回転体の表面に接触してい
ることを特徴とする定着装置。 ２）定着用回転体はベルト状又はロール状とされて成る
特許請求範囲の第１項記載の定着装置。[Scope of Claims] 1) A fixing device that includes at least a fixing rotary body and forms a fixed image on a recording material with the fixing rotary body,
A coating device is provided that is movable into and out of contact with the fixing rotor and can apply a release agent to the surface of the fixing rotor, and the coating device is configured to rotate the fixing rotor. A fixing device, wherein the fixing device is in contact with a surface of the fixing rotating body when stopped. 2) The fixing device according to claim 1, wherein the fixing rotating body is belt-shaped or roll-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63078061A JP2521122B2 (en) | 1988-04-01 | 1988-04-01 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63078061A JP2521122B2 (en) | 1988-04-01 | 1988-04-01 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01252986A true JPH01252986A (en) | 1989-10-09 |
| JP2521122B2 JP2521122B2 (en) | 1996-07-31 |
Family
ID=13651340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63078061A Expired - Fee Related JP2521122B2 (en) | 1988-04-01 | 1988-04-01 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521122B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03228078A (en) * | 1990-02-01 | 1991-10-09 | Canon Inc | Fixing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52155536A (en) * | 1976-06-19 | 1977-12-24 | Ricoh Co Ltd | Fixing device |
| JPS536041A (en) * | 1976-07-06 | 1978-01-20 | Ricoh Co Ltd | Fixing device |
| JPS5374045A (en) * | 1976-12-14 | 1978-07-01 | Canon Inc | Fixing device for electrophotography |
| JPS5382363A (en) * | 1976-12-28 | 1978-07-20 | Ricoh Co Ltd | Roller fixing device for electrophotographic copier |
| JPS54156530U (en) * | 1978-04-21 | 1979-10-31 | ||
| JPS62164074A (en) * | 1986-01-14 | 1987-07-20 | Canon Inc | Fixing device |
-
1988
- 1988-04-01 JP JP63078061A patent/JP2521122B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52155536A (en) * | 1976-06-19 | 1977-12-24 | Ricoh Co Ltd | Fixing device |
| JPS536041A (en) * | 1976-07-06 | 1978-01-20 | Ricoh Co Ltd | Fixing device |
| JPS5374045A (en) * | 1976-12-14 | 1978-07-01 | Canon Inc | Fixing device for electrophotography |
| JPS5382363A (en) * | 1976-12-28 | 1978-07-20 | Ricoh Co Ltd | Roller fixing device for electrophotographic copier |
| JPS54156530U (en) * | 1978-04-21 | 1979-10-31 | ||
| JPS62164074A (en) * | 1986-01-14 | 1987-07-20 | Canon Inc | Fixing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03228078A (en) * | 1990-02-01 | 1991-10-09 | Canon Inc | Fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2521122B2 (en) | 1996-07-31 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |