JPH021309B2 - - Google Patents
Info
- Publication number
- JPH021309B2 JPH021309B2 JP22018282A JP22018282A JPH021309B2 JP H021309 B2 JPH021309 B2 JP H021309B2 JP 22018282 A JP22018282 A JP 22018282A JP 22018282 A JP22018282 A JP 22018282A JP H021309 B2 JPH021309 B2 JP H021309B2
- Authority
- JP
- Japan
- Prior art keywords
- offset
- roller
- fixing
- contact
- blade
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 37
- 230000002265 prevention Effects 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 25
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- 229920001971 elastomer Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920002449 FKM Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2093—Release agent handling devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、電子写真複写機、同フアクシミリ等
で使用される接融ローラ型定着装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fusing roller type fixing device used in electrophotographic copying machines, facsimiles, and the like.
電子写真複写機に於いては、一般に、感光ドラ
ム上に形成されたトナー像を複写用紙上に転写
し、加熱手段を有する定着用加熱ローラと加圧ロ
ーラとの間に、トナー像が形成された複写紙を通
し、両ローラでトナー像を加圧、加熱して、複写
紙に融着させることにより定着を行つている。 In an electrophotographic copying machine, a toner image formed on a photosensitive drum is generally transferred onto copy paper, and the toner image is formed between a fixing heating roller having a heating means and a pressure roller. The toner image is fixed by passing the toner image through the copy paper and applying pressure and heat with both rollers to fuse the toner image to the copy paper.
しかして、トナー像が加熱定着される際に、ト
ナー像の一部が、加熱ローラの表面に付着し、後
続の複写紙表面に転写される、所謂オフセツト現
象が生ずることがある。この現象を防止すべく、
加熱ローラの同筒状芯金表面には、四弗化エチレ
ン樹脂、シリコンゴム等の耐熱弾性体を被覆して
おり、さらに、その被覆尽の表面に、シリコンオ
イル、低分子量ポリエチレン等のオフセツト防止
液を、フエルト、四弗化エチレン樹脂製ロール等
の供給手段を介して塗布している。 Therefore, when the toner image is heated and fixed, a portion of the toner image may adhere to the surface of the heating roller and be transferred to the surface of the subsequent copy paper, which is a so-called offset phenomenon. In order to prevent this phenomenon,
The surface of the cylindrical core metal of the heating roller is coated with a heat-resistant elastic material such as tetrafluoroethylene resin or silicone rubber, and the entire surface is coated with silicone oil, low molecular weight polyethylene, etc. to prevent offset. The liquid is applied via a supply means such as felt or a roll made of tetrafluoroethylene resin.
このオフセツト防止液塗布装置の一例を、第１
図、第２図に則して説明する。図中、１は接触ロ
ーラ型定着装置であり、同装置１は、加熱ローラ
２、加圧ローラ３、クリーニング装置４およびオ
フセツト防止液塗布装置６で構成されている。ク
リーニング装置４に於けるクリーニングブレード
５は、その先端が加熱ローラ２の表面に、傾斜状
に当接し、加熱ローラ２に付着したトナー、埃等
を払拭する。また、オフセツト防止液塗布装置６
は、オフセツト防止液８が貯溜されたオイルパン
７と、同オイルパン７内に基端側を浸潰され、先
端部が加熱ローラ２の表面に当接されたオフセツ
ト防止液供給部材（例えば、フエルト製）９と、
オイルパン７に固定された支持部材に支持された
オフセツト防止液塗布量調整ブレード（以下、単
に塗布量調整ブレードと称する）１１とで構成さ
れている。オフセツト防止液８は、オフセツト防
止液供給部材９で吸い上げられ、同供給部材９の
先端部で加熱ローラ２の表面に塗布されるが、余
分に塗布されたオフセツト防止液８は、加熱ロー
ラ２の回転方向前方に位置する塗布量調整ブレー
ド１１で掻き取られる。 An example of this anti-offset liquid application device is shown in Fig.
This will be explained with reference to FIGS. In the figure, reference numeral 1 denotes a contact roller type fixing device, and the device 1 is composed of a heating roller 2, a pressure roller 3, a cleaning device 4, and an offset prevention liquid coating device 6. The tip of the cleaning blade 5 in the cleaning device 4 contacts the surface of the heating roller 2 in an inclined manner, and wipes off toner, dust, etc. attached to the heating roller 2. In addition, the offset prevention liquid application device 6
includes an oil pan 7 in which offset prevention liquid 8 is stored, and an offset prevention liquid supply member (for example, Made of felt) 9 and
The offset prevention liquid application amount adjustment blade 11 (hereinafter simply referred to as application amount adjustment blade) is supported by a support member fixed to the oil pan 7. The anti-offset liquid 8 is sucked up by the anti-offset liquid supply member 9 and applied to the surface of the heating roller 2 at the tip of the supply member 9. It is scraped off by the coating amount adjusting blade 11 located at the front in the rotational direction.
前記オフセツト防止液塗布装置６に依れば、塗
布量調整ブレード１１で掻き取られたオフセツト
防止液８は、塗布量調整ブレード１１の先端縁と
加熱ローラ２とで形成されるＶ溝Ｇに沿つて流
れ、加熱ローラ２の両側端部に付着する。この付
着したオフセツト防止液８aは、複写機を停止さ
せた後、下方に流れ、滴下して複写機内部を汚す
ことになる。 According to the offset prevention liquid application device 6, the offset prevention liquid 8 scraped off by the application amount adjustment blade 11 is distributed along the V-groove G formed by the tip edge of the application amount adjustment blade 11 and the heating roller 2. The liquid then flows and adheres to both ends of the heating roller 2. After the copying machine is stopped, the adhered offset prevention liquid 8a flows downward and drips, contaminating the inside of the copying machine.
そこで、斯かる流出を防止すべく、第３図に示
すように、塗布量調整ブレード１１の先端部両側
に突起１１aを設けることが提案された。突起１
１aは、Ｖ溝Ｇの両端を塞止するため、流出防止
に一応の効果が得られるが、突起１１aの先端を
乗り越えて流出し、第２図に示す場合と同様に、
加熱ローラ２の両側端部に付着（８a）して滴下
することとなつた。なお、Ｖ溝Ｇから溢流し、塗
布量調整ブレード１１の上面を流れるオフセツト
防止液８は、オイルパン内に回収される。 Therefore, in order to prevent such leakage, it has been proposed to provide projections 11a on both sides of the tip of the coating amount adjusting blade 11, as shown in FIG. Protrusion 1
1 a blocks both ends of the V-groove G, so that it is somewhat effective in preventing outflow, but the protrusion 11 a flows over the tip of the protrusion 11 a , and as in the case shown in FIG. 2,
It became attached (8 a ) to both ends of the heating roller 2 and dripped. The offset prevention liquid 8 overflowing from the V-groove G and flowing on the upper surface of the coating amount adjusting blade 11 is collected in the oil pan.
本発明は、斯かる技術的背景の下に創案された
ものであり、電子写真複写機等で使用される接触
ローラ型定着装置に於けるオフセツト防止液塗布
量調整ブレードを略ぼ台形状に形成し、その平行
二辺の長辺側を定着ローラ外周面に当接させたこ
とを特徴としている。 The present invention was devised against this technical background, and the offset prevention liquid application amount adjusting blade in a contact roller type fixing device used in an electrophotographic copying machine, etc. is formed into a substantially trapezoidal shape. The fixing roller is characterized in that the long sides of the two parallel sides are brought into contact with the outer circumferential surface of the fixing roller.
本発明の目的は、オフセツト防止液の滴下を無
くし、以つて複写機内の汚染を防止することにあ
る。 An object of the present invention is to eliminate dripping of anti-offset liquid, thereby preventing contamination within the copying machine.
以下、第４図乃至第６図に示した一実施例に則
して本発明を説明する。なお、本実施例の接触ロ
ーラ型定着装置は、塗布量調整ブレードの形状を
除き、第１図、第２図に示した接触ローラ型定着
装置１と同一構造であり、したがつて、第４図乃
至第６図に於いても、同一部材には同一符号を付
している。 Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 4 to 6. The contact roller type fixing device of this embodiment has the same structure as the contact roller type fixing device 1 shown in FIGS. 1 and 2, except for the shape of the coating amount adjusting blade. The same members are denoted by the same reference numerals in the figures through FIG. 6 as well.
塗布量調整ブレード２１は、略ぼ台形状に形成
されており、その平行二辺の短辺側で、支持部材
１０に支持されている。また、平行二辺の長辺側
両端部には、突起２２が形成され、同突起２２の
先端縁２２aは、外方へ拡開する如く傾斜してい
る。前記塗布量調整ブレード１１は、弗素ゴム
（例えば、デユポン社製バイトンゴム：硬度70度）
で形成されており、弗素ゴムを燐青銅、ステンレ
ス鋼等の薄板で形成された支持部材１０の一端縁
部にモールデイングにより付加することにより製
造される。 The coating amount adjusting blade 21 is formed into a substantially trapezoidal shape, and is supported by the support member 10 on its two parallel short sides. Furthermore, a protrusion 22 is formed at both ends of the long side of the two parallel sides, and a tip end edge 22 a of the protrusion 22 is inclined so as to expand outward. The coating amount adjusting blade 11 is made of fluorine rubber (for example, Viton rubber manufactured by DuPont: hardness 70 degrees).
It is manufactured by adding fluororubber to one end edge of a support member 10 made of a thin plate of phosphor bronze, stainless steel, etc. by molding.
しかして、塗布量調整ブレード２１は、その平
行二辺が加熱ローラ２と平行になるように配設さ
れ、かつ先端側が、加熱ローラ２の回転方向とは
逆方向に指向して伸張し、加熱ローラ２の表面に
所定の傾斜角θで当接している。塗布量調整ブレ
ード２１と、加熱ローラ２との当接関係は、両突
起２２がその全面で加熱ローラ２の表面に接融
し、ブレード本体の先端２１aに於ける下側エツ
ジが加熱ローラ２表面に当接する如くなされてい
る。 Therefore, the application amount adjusting blade 21 is arranged so that its two parallel sides are parallel to the heating roller 2, and the tip side extends in the direction opposite to the rotational direction of the heating roller 2, thereby heating the coating amount adjusting blade 21. It is in contact with the surface of the roller 2 at a predetermined inclination angle θ. The contact relationship between the application amount adjusting blade 21 and the heating roller 2 is such that both protrusions 22 are in contact with the surface of the heating roller 2 on their entire surfaces, and the lower edge of the tip 21 a of the blade body is in contact with the heating roller 2. It is made so that it comes into contact with the surface.
前記構成に依れば、オフセツト防止液供給部材
９によつて加熱ローラ２の表面に塗布されたオフ
セツト防止液８は、前記部材９の先端部に対し加
熱ローラ２の回転方向側に配接された塗布量調整
ブレード２１によつて一部掻き取られ、適正付着
量になされる。掻き取られたオフセツト防止液８
は、Ｖ溝Ｇ内に溜り、Ｖ溝Ｇに沿つて両側に流
れ、突起２２の外周から、側辺２１ｂに沿うよう
に流下する（矢印Ａ参照）。流下したオフセツト
防止液は、第４図乃至第５図図示の如く、塗布量
調整ブレード２１の裏面と加熱ローラ２とで画成
される間隙部に回り込んで（８ｂ）、加熱ローラ
２の回転に伴つて、加圧ローラ３との接触側へ移
行する。この様に、塗布量調整ブレード２１で
は、Ｖ溝Ｇから突起２２を越えて流出したオフセ
ツト防止液は、加熱ローラ２の軸端側に移行して
付着すること無く、側辺２１ｂに沿つて軸方向中
央寄りに流れて付着するので、加熱ローラ２が一
回転した時、突起２２の先端縁２２ａ乃至ブレー
ド本体の先端２１ａで掻き取られる。したがつ
て、多量のオフセツト防止液が、加熱ローラ２の
両側端部表面に付着するという現象は防止され、
オフセツト防止液の滴下によつて複写機内が汚染
されることは無い。 According to the above configuration, the anti-offset liquid 8 applied to the surface of the heating roller 2 by the anti-offset liquid supply member 9 is arranged on the rotational direction side of the heating roller 2 with respect to the tip of the member 9. A portion of the coating is scraped off by the applied coating amount adjustment blade 21 to obtain an appropriate coating amount. Scraped off offset prevention liquid 8
is collected in the V-groove G, flows to both sides along the V-groove G, and flows down from the outer periphery of the protrusion 22 along the side 21b (see arrow A). As shown in FIGS. 4 and 5, the offset prevention liquid that has flowed down flows into the gap defined by the back surface of the application amount adjusting blade 21 and the heating roller 2 (8b), and the heating roller 2 rotates. Along with this, the pressure roller 3 moves to the contact side. In this way, in the application amount adjusting blade 21, the anti-offset liquid flowing out from the V-groove G beyond the protrusion 22 does not migrate to the axial end side of the heating roller 2 and adhere to it, but instead flows along the side edge 21b. Since it flows toward the center and adheres, when the heating roller 2 makes one revolution, it is scraped off by the tip edge 22a of the protrusion 22 or the tip 21a of the blade body. Therefore, the phenomenon of a large amount of anti-offset liquid adhering to the surfaces of both end portions of the heating roller 2 is prevented.
The interior of the copying machine is not contaminated by dripping of the offset prevention liquid.
なお、塗布量調整ブレード２１の突起２２は、
Ｖ溝Ｇから側方へ流出するオフセツト防止液の量
を抑制できるが、突起２２を省略しても、本発明
の目的を達成することができる。 Note that the protrusion 22 of the coating amount adjusting blade 21 is
Although the amount of anti-offset liquid flowing out laterally from the V-groove G can be suppressed, the object of the present invention can be achieved even if the projection 22 is omitted.
また、オフセツト防止液塗布装置６、クリーニ
ング装置４は、加熱ローラ２側のみならず、加圧
ローラ３側にも配設することができる。 Further, the offset prevention liquid application device 6 and the cleaning device 4 can be provided not only on the heating roller 2 side but also on the pressure roller 3 side.
以上の説明から明らかな様に、本発明では、電
子写真複写機等で使用される接触ローラ型定着装
置に於けるオフセツト防止液塗布量調整ブレード
を略ぼ台形状に形成し、その平行二辺の長辺側を
定着ローラ外周面に当接させたので、オフセツト
防止液塗布量調整ブレードによつて掻き取られ
て、同ブレード先端両側から流出したオフセツト
防止液は、同ブレード両側辺に沿つて、軸方向中
央寄りに流下する。したがつて、オフセツト防止
液が塗布量調整ブレードの外方に於ける軸端側定
着ローラ表面に付着することは無く、複写機内へ
の滴下現象も生じ難い。このように、本発明で
は、塗布量調整ブレードの簡単な形状変更で、顕
著な作用効果を奏し得る。 As is clear from the above description, in the present invention, the offset prevention liquid application amount adjusting blade in a contact roller type fixing device used in an electrophotographic copying machine, etc. is formed into a substantially trapezoidal shape, and its two parallel sides are Since the long side is brought into contact with the outer peripheral surface of the fixing roller, the anti-offset liquid that is scraped off by the anti-offset liquid coating amount adjustment blade and flows out from both sides of the tip of the blade is distributed along both sides of the blade. , flows down toward the center in the axial direction. Therefore, the anti-offset liquid does not adhere to the surface of the fixing roller on the shaft end side outside the application amount adjusting blade, and the phenomenon of dripping into the copying machine is less likely to occur. As described above, in the present invention, remarkable effects can be achieved by simply changing the shape of the coating amount adjusting blade.
第１図は公知に係る接触ローラ型定着装置の縦
断側面図、第２図はその要部斜視図、第３図は他
の公知に係る接触ローラ型定着装置の要部斜視
図、第４図は本発明の一実施例に係る接触ローラ
型定着装置の要部平面図、第５図は第４図に於け
るＶ−Ｖ線矢視図、第６図は同装置の要部斜視図
である。
１……接触ローラ型定着装置、２……加熱ロー
ラ、３……加圧ローラ、４……クリーニング装
置、５……クリーニングブレード、６……オフセ
ツト防止液塗布装置、７……オイルパン、８……
オフセツト防止液、９……オフセツト防止液供給
部材、１０……支持部材、１１……オフセツト防
止液塗布量調整ブレード、２１……オフセツト防
止液塗布量調整ブレード、２２……突起、Ｇ……
Ｖ溝。
FIG. 1 is a longitudinal sectional side view of a known contact roller type fixing device, FIG. 2 is a perspective view of the main part thereof, FIG. 3 is a perspective view of the main part of another known contact roller type fixing device, and FIG. 5 is a plan view of a main part of a contact roller type fixing device according to an embodiment of the present invention, FIG. 5 is a view taken along the line V-V in FIG. 4, and FIG. 6 is a perspective view of a main part of the same device. be. DESCRIPTION OF SYMBOLS 1... Contact roller type fixing device, 2... Heat roller, 3... Pressure roller, 4... Cleaning device, 5... Cleaning blade, 6... Offset prevention liquid application device, 7... Oil pan, 8 ……
Offset prevention liquid, 9...Offset prevention liquid supply member, 10...Support member, 11...Offset prevention liquid application amount adjusting blade, 21...Offset prevention liquid application amount adjustment blade, 22...Protrusion, G...
V groove.
Claims (1)
着ローラと接融させて定着する装置であつて、定
着ローラの少なくとも一方の定着ローラ外周面に
沿つてクリーニングブレード、オフセツト防止液
供給部材およびオフセツト防止液塗布量調整ブレ
ードを併設して成る電子写真複写機等の接触ロー
ラ型定着装置に於いて、前記定着ローラと平行に
その表面に沿つて配設された前記オフセツト防止
液塗布量調整ブレードは、略ぼ台形状に形成され
ており、その平行二片に於ける短辺側で支持部材
によつて支持され、同支持部材から前記定着ロー
ラの回転に逆らうよう上方に指向して延設される
とともに、その平行二辺に於ける長辺側である先
端縁が、前記定着ローラ表面に対して所定の傾斜
角で当接させられていることを特徴とする接触ロ
ーラ方定着装置。1 A device for fixing a toner image formed on a transfer medium by fusing it with a pair of fixing rollers, which includes a cleaning blade, an anti-offset liquid supply member, and an offset roller along the outer peripheral surface of at least one of the fixing rollers. In a contact roller type fixing device such as an electrophotographic copying machine, which is equipped with an anti-offset liquid application amount adjustment blade, the offset prevention liquid application amount adjustment blade is disposed parallel to the fixing roller along its surface. , is formed into a substantially trapezoidal shape, is supported by a support member on the short sides of its two parallel pieces, and extends upward from the support member so as to oppose the rotation of the fixing roller. A contact roller type fixing device, characterized in that a leading edge of the long side of the two parallel sides is brought into contact with the surface of the fixing roller at a predetermined inclination angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22018282A JPS59111668A (en) | 1982-12-17 | 1982-12-17 | Contact roller type fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22018282A JPS59111668A (en) | 1982-12-17 | 1982-12-17 | Contact roller type fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59111668A JPS59111668A (en) | 1984-06-27 |
| JPH021309B2 true JPH021309B2 (en) | 1990-01-11 |
Family
ID=16747163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22018282A Granted JPS59111668A (en) | 1982-12-17 | 1982-12-17 | Contact roller type fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111668A (en) |
-
1982
- 1982-12-17 JP JP22018282A patent/JPS59111668A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59111668A (en) | 1984-06-27 |
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