EP0505404B1 - Station de fixage pour une imprimante ou un copieur electrophotographiques - Google Patents

Station de fixage pour une imprimante ou un copieur electrophotographiques Download PDF

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Publication number
EP0505404B1
EP0505404B1 EP91900252A EP91900252A EP0505404B1 EP 0505404 B1 EP0505404 B1 EP 0505404B1 EP 91900252 A EP91900252 A EP 91900252A EP 91900252 A EP91900252 A EP 91900252A EP 0505404 B1 EP0505404 B1 EP 0505404B1
Authority
EP
European Patent Office
Prior art keywords
fixing
roller
fixing roller
station according
fixing station
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
Application number
EP91900252A
Other languages
German (de)
English (en)
Other versions
EP0505404A1 (fr
Inventor
Karl Heigl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Wincor Nixdorf International GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wincor Nixdorf International GmbH filed Critical Wincor Nixdorf International GmbH
Publication of EP0505404A1 publication Critical patent/EP0505404A1/fr
Application granted granted Critical
Publication of EP0505404B1 publication Critical patent/EP0505404B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
    • 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
    • G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure

Definitions

  • thermal fixing stations In electrophotographic printing or copying machines, it is customary to fix the recording medium coated with toner in a thermal fixing station.
  • thermal fixing stations generally contain electrically heated fixing rollers with associated pressure rollers that can be pivoted on and off.
  • the record carrier is passed between the fixing roller and the pressure roller for fixing.
  • the toner is fixed on the recording medium by the action of heat from the fixing roller. Since the toner has to be brought to the melting temperature during the short contact distance of the recording medium with the fixing roller, a high heating output on the part of the fixing roller is necessary. For this purpose, it is common to install halogen lamps with high heating power in the hollow fixing roller.
  • halogen spotlights have the disadvantage that their burning time is relatively short and it is therefore necessary to replace them frequently.
  • EP-A3-0 184 202 describes a fixing device with a fixing roller which is mounted on heating elements as bearing elements. To replace the fixing roller, the heating rods are pulled out of the device housing. It is difficult to replace the fuser roller when it is warm and is reserved for a maintenance technician alone.
  • the object of the invention is to design a fixing station of the type mentioned at the outset in such a way that it is constructed to be maintenance-friendly, so that wearing parts can be replaced without special tools.
  • both the fixing roller and the pressure roller can be exchanged without special tools.
  • the heater module arranged in the fixing roller for heating the fixing roller is also designed to be exchangeable, the fixing roller being able to remain in the fixing station in order to replace this particularly wear-prone part.
  • the device In order to be able to cool down the hot rollers that have been replaced or the heater module, the device has a cooling rack.
  • the downtimes required for the maintenance of the device are considerably shortened by the invention.
  • the exchange can be carried out by the operator of the device himself, without the need for specially trained maintenance technicians.
  • a fixing station (FIG. 1) of an electrophotographic printing device contains a fixing roller or heating roller 11, which is mounted on a frame 10 of the printing device, and a pressure roller 9 made of a steel tube covered with rubber.
  • the pressure roller 9 is mounted on two rockers 8 and can be operated with the aid of 2 electromechanically driven cam disks 7 can be pivoted onto and off the fixing roller 11 via the lugs 6 (arrow direction).
  • the rockers 8 are pivoted about the axis 4 against the force of springs 5.
  • the heating roller 11 consists of an aluminum tube 13 coated with Teflon 12, which is open on both sides.
  • the heating roller 11 is mounted in the frame 10 of the fixing station, namely on one side via a bearing flange 14 with a central holding and guiding opening 15 and on the other side via a bearing element 16 which is provided with a drive device 17, shown only schematically here, in the form of a Belt wheel 18 is connected.
  • a bearing 19/1 is located on the bearing flange 14 and engages with a centering piece 20 in the aluminum tube 13 of the heating roller 11.
  • the other bearing element 16 with bearing 19/2 on the drive side of the fixing station also has a centering projection 21 which engages in the other side of the aluminum tube 13 of the heating roller 11.
  • 16 plate springs 22 are arranged on the bearing element, which engage the heating roller via a disk 22/1 and press against the centering piece 20 of the bearing flange 14. They ensure the compensation of the axial thermal expansion.
  • the aluminum tube of the heating roller 11 slides on the centering shoulder 21, the disc 22/1 being connected to the centering shoulder 21 by screws 21/1.
  • a driver wedge 23 on the bearing element 16 engages in a corresponding recess in the aluminum tube 13 of the heating roller 11 and thus ensures a secure drive connection.
  • the bearing flange 14 is detachably connected to the frame 10 of the fixing station via wing screws 24.
  • the heating roller 11 is secured with respect to the bearing flange 14 with the aid of holding claws 26 fastened via wing screws 25.
  • the holding claw 26 has an attachment 27 which engages in a groove 28 of the heating roller, the attachment 27 not touching the groove 28 in the installed state, so that the heating roller 11 can move radially freely.
  • the holding claw 26 has a securing function when replacing the fixing roller 11.
  • the wing screws 24 are loosened and the fixing roller 11 can be secured together with the flange 14 can be pulled out of the frame 10 of the fixing station and replaced by the holding claws 26 with the aid of a handle 29 fastened to the bearing flange 14.
  • a retaining ring 24/1 receiving the wing screws 24 is covered on the inside with felt 24/2.
  • radiator module 30 consisting of several, e.g. two two halogen spotlights arranged one above the other.
  • This radiator module is designed to be interchangeable. For this purpose, it is guided on one side in the holding and guide opening 15 of the bearing flange 14 and on the other side at an angle 31 which serves as a spacer and which is fastened on the bearing element 16 on the drive side of the fixing station.
  • the angle 31 has a through opening 32, which is used to guide and hold the radiator module 30.
  • a handle 33 made of heat-insulating plastic is arranged on the other end of the radiator module.
  • This grip piece has an extension 34 which centers the radiator module 30 in the through opening 32.
  • the radiator module 30 can be fastened in the through opening 32 via the extension 34 with the aid of a clamping device in the form of a clamping screw 35.
  • the radiator module has on one side a spacer (sleeve) 36 made of sheet metal, which holds the radiator module securely in the holding and fixing opening 15 of the bearing flange 14.
  • the sleeve 36 can also be part of the bearing flange 14 or it can be pushed over the radiator module as an independent element before installation.
  • Further heat protection elements are funnels 37 made of aluminum sheet with a central through opening for the radiator module, which are arranged on both sides in the aluminum tube 13 of the fixing roller 11 are.
  • the funnels shield the actual heat-generating area of the radiator module 30 with the filaments arranged therein against the bearings and thereby prevent the bearings 19/1, 19/2 from overheating.
  • Such 5 protective measures are necessary because the roller temperature on the outer surface of the fixing roller in actual printing operation can be 215-225 °.
  • the radiator module 30 is electrically contacted via a connector 38 arranged in the area of the handle 33 and a further connector 39 in the area of the bearing flange 14.
  • the radiator module 30 can now be easily replaced by the operator even when hot. For this purpose, first the plug 39 and then the wing screws 24 are loosened and then, according to the illustration in FIG.
  • the angle 31 serving as a spacer element ensures safe contact-free removal.
  • the printing device now additionally has, in a special non-heat-sensitive area, a holding device 40 with two support elements 41, which serve to receive the radiator module during the cooling phase (FIG. 3).
  • a new radiator module can be inserted into the fixing roller 11 and fixed using the clamping device 35. This insertion is facilitated by a centering shoulder 42 on the bearing flange 14 (FIG. 2). If the plug 39 of the electrical connection is installed stationary in the area of the bearing flange, the centering effect of the holding and fixing opening enables safe and damage-free contact between the plug 39 and the radiator module 30.
  • the heating or fixing roller 11 can also be exchanged in the hot state. For safety reasons, it is necessary to do this beforehand with the radiator module 30 to remove. Furthermore, the fixing station must be in an operating state in which the pressure roller 9 is pivoted away from the fixing roller 11. An oiling device, not shown here, on the fixing station must also be pivoted away. Now the wing screws 24 on the bearing flange 14 on the operator side are loosened. 4, the operator pulls the roller on the handle 29 from the drive flange 16 with protective gloves 50 as shown in FIG. 4 and pulls it out of the device through the side plate 10. The fusing roller 11 is then placed on a cooling shelf 51, which is arranged above the fusing station, with shelves 52. The cooling shelf can be arranged anywhere on the device or it is possible to arrange a separate cooling shelf on a separate frame near the device.
  • a second bearing flange 14 is placed in a new fixing roller 11 and fastened to it with the holding claws 26. Bearing flange 14 with roller 11 are now inserted in the fixing station in the reverse order to that previously described. The operator can change the heating roller without tools.
  • the pressure roller 9 is also exchangeably mounted in the fixing station. This is described in more detail below with reference to FIGS. 5 to 8.
  • the pressure roller 9 consists of a steel tube 53, which is covered with 12 mm silicone rubber 54 and an approximately 1 mm thick PFA layer.
  • the pressure roller is designed as a hollow roller and has a permanently installed ball bearing 55 at both ends.
  • the pressure roller 9 is mounted between the two vibrations 8 on one side (drive side) via a fixed pin 56 and on the operating side via a movable mounting pin 57
  • the movable mounting pin 57 is axially displaceably mounted in a guide sleeve 58 against the force of a spring 59 and has an operating head 60 in the form of a spherical head with which the movable bolt 57 can be pulled out of the ball bearing 55.
  • the locating pin 57 is connected to a cup-shaped sleeve 61 which is guided on the guide sleeve 58.
  • the sleeve 61 has a collar-shaped projection 62 which interacts with a stop 63 of the fixing station.
  • Collar-shaped stop 62 and stop 63 serve as a locking device. Only when the pressure roller 9 is pivoted away from the fixing roller 11 is the collar-shaped extension 62 outside the effective range of the stop 63 and the movable mounting bolt 57 can be retracted via the control button 60 and thus the pressure roller 9 can be unlocked. If the pressure roller 9 is pivoted, the stop 63 prevents the connection between the movable locating pin 57 and the pressure roller 9 from being released.
  • the locking stop 63 is also coupled to a roller saddle (paper guide), not shown here, arranged underneath the fixing station, in such a way that the locking of the Pressure roller 9 can only be released when this so-called roller saddle is open. This is to prevent jamming of the roller saddle or damage to the roller saddle.
  • a roller saddle paper guide
  • the pressure roller is pivoted on and off to the fixing roller 11 with the aid of a stepper motor 64, which engages via a dog clutch 65 on a camshaft 66 on which the two cam disks 7 are fastened.
  • the camshaft 66 is mounted in the frame 10 of the device via an adjusting mechanism 67, which is used to adjust the pressure spring force of the pressure roller.
  • the cam disks 7 bear on the pressure elements 6 of the rockers 8 under the action of the springs 5.
  • the rockers 8 are in turn pivotable about the axis 4 via bearings 68.
  • two adjusting screws 69 are arranged on the adjusting mechanism 67 (FIG. 7), by means of which the position of the camshaft 66 in relation to the pressure roller 9 can be changed or adjusted.
  • a scanning device 70 is arranged on the camshaft 66 in the form of a Hall generator. This scanning device supplies the corresponding shaft position in the form of scanning signals to the control arrangement of the printing device or to a corresponding monitoring device for controlling the paper flow.
  • the pressure roller 9 is to be replaced when the fixing roller 11 is in the swiveled-out state, the locking between the movable mounting bolt 57 and the pressure roller 9 is released by pulling the control button 60, as shown in FIG.
  • the pressure roller can then be removed from the fixing station from below, preferably with protective gloves.
  • Protective gloves 50 are necessary if the pressure roller 9 is to be replaced together with the hot roller exchange when the fixing station is hot.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

Dans la station de fixage d'une imprimante ou d'un copieur électrophotographiques sont disposés un cylindre de fixage (11) chauffé par un module radiateur (30), et un cylindre de pression qui pivote en direction et à l'opposé du cylindre de fixage (11) par l'intermédiaire d'un mécanisme à cames (8, 7). Afin que le cylindre de fixage et le cylindre de pression puissent être remplacés tout en étant encore chauds, le cylindre de fixage (11) est monté dans des brides de palier (14, 16), dont l'une (16) est fixée à demeure dans l'appareil tandis que l'autre (14) est montée amovible. La bride amovible (14) comporte des éléments de serrage (26) qui maintiennent le cylindre de fixage, ainsi qu'une poignée au moyen de laquelle la bride (14), avec le cylindre de fixage (11) qui y est rattaché, peut être enlevée de la station de fixage. Le cylindre de pression (9) est monté amovible entre deux coulisses (8) par l'intermédiaire d'un boulon de fixation amovible (57). Un dégagement de refroidissement (40, 51) destiné à recevoir le cylindre de fixage (11) chaud et le module radiateur (30) est également ménagé dans l'appareil.

Claims (10)

  1. Poste de fixage pour dispositif d'impression ou de copie électrophotographique comportant un rouleau (11) de fixage chauffé électriquement et un rouleau presseur (9) susceptible d'être appliqué sur le rouleau de fixation (11) et d'en être retiré par pivotement, au moyen d'un mécanisme (8 ; 7) de fixation, caractérisé en ce que le rouleau de fixage a la forme d'un rouleau creux, comportant à l'intérieur un élément chauffant (30), et en ce qu'il est monté au moyen de supports de montage (14, 16) dans un bâti (10) du poste de fixage, un premier support de montage (16) étant solidaire du bâti et un deuxième support de montage (14) étant fixé de façon démontable sur le bâti (10) et comportant des éléments de maintien (26) qui sont conformés de façon telle qu'ils relient le deuxième support (14) au rouleau de fixage en vue de l'enlèvement du rouleau de fixage hors du poste de fixage et qu'ils permettent de séparer le deuxième support de montage du rouleau de fixage qui a été enlevé.
  2. Poste de fixage selon la revendication 1, caractérisé en ce que
    le deuxième support (14) comporte un élément de saisie (29).
  3. Poste de fixation selon la revendication 1 ou 2, caractérisé en ce que les supports de montage (14, 16) comportent des éléments de centrage (20, 21) qui pénètrent latéralement dans le rouleau de fixage (11) et sur lesquels repose de façon glissante le rouleau de fixage (11) et que, sur au moins l'un des supports de montage (14, 16), sont disposés des éléments élastiques (22), qui serrent le rouleau de fixage (11) entre les supports de montage (14, 16), en vue de compenser le déplacement axial du rouleau de fixage sous l'effet de la chaleur.
  4. Poste de fixage selon l'une des revendications 1 à 3, caractérisé en ce que des éléments (37) de protection à l'encontre de la chaleur sont disposés dans le rouleau de fixage et protègent les supports de montage (14, 16) d'une zone chauffée par les éléments chauffants.
  5. Poste de fixage selon l'une des revendications 1 à 4, caractérisé en ce que
    les supports de montage (14, 16) comportent des ouvertures de réception (15, 32) centrales destinées à recevoir, de façon à ce qu'ils puissent être remplacés, des éléments chauffants qui sont assemblés en un module de rayonnement (30) et qui sont disposés de façon telle que le module de rayonnement (30) puisse être remplacé sans démontage du rouleau de fixage (11).
  6. Poste de fixage selon la revendication 5, caractérisé en ce que le module de rayonnement (30) présente à une de ses extrémités une zone de réception destinée à recevoir une pièce formant poignée (33) isolante thermiquement.
  7. Poste de fixage selon l'une des revendications 1 à 6, caractérisé en ce que le rouleau presseur (9) est monté de façon démontable entre deux bras oscillants (8) susceptible d'être appliqués en basculant par rapport à un axe (4) sur le rouleau de fixage (11) et d'en être retirés, à l'aide d'un dispositif à excentrique (66, 7) entraîné par un moteur électrique.
  8. Poste de fixage selon la revendication 7, caractérisé en ce que le dispositif à excentrique (66) comporte un arbre (66) à cames comportant des disques (7) de came, l'arbre (66) à cames pouvant être déplacé à l'aide d'un mécanisme de réglage (67) par rapport aux bras oscillants (8) à actionner.
  9. Poste de fixage selon l'une des revendications 1 à 8, caractérisé en ce que le rouleau presseur est monté de façon démontable à l'aide d'un axe (56) fixe et d'un axe (57) mobile à l'encontre d'un ressort (59) l'axe (57) mobile comportant un bouton (60) de manoeuvre.
  10. Dispositif d'impression ou de copie comportant un poste de fixage, selon l'une des revendications 1 à 9, caractérisé en ce qu'il est prévu un dispositif de refroidissement (40, 41, 51, 52) du rouleau de fixage (11) et/ou de l'élément chauffant (30).
EP91900252A 1989-12-13 1990-11-27 Station de fixage pour une imprimante ou un copieur electrophotographiques Expired - Lifetime EP0505404B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP89123033 1989-12-13
EP89123033 1989-12-13
PCT/EP1990/002027 WO1991009351A1 (fr) 1989-12-13 1990-11-27 Station de fixage pour une imprimante ou un copieur electrophotographiques

Publications (2)

Publication Number Publication Date
EP0505404A1 EP0505404A1 (fr) 1992-09-30
EP0505404B1 true EP0505404B1 (fr) 1994-06-01

Family

ID=8202228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91900252A Expired - Lifetime EP0505404B1 (fr) 1989-12-13 1990-11-27 Station de fixage pour une imprimante ou un copieur electrophotographiques

Country Status (5)

Country Link
US (1) US5301000A (fr)
EP (1) EP0505404B1 (fr)
JP (1) JPH05504633A (fr)
DE (1) DE59005966D1 (fr)
WO (1) WO1991009351A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103333A1 (de) * 2012-04-17 2013-10-17 Océ Printing Systems GmbH & Co. KG Digitaldrucker zum Bedrucken eines Aufzeichnungsträgers

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US5301000A (en) * 1989-12-13 1994-04-05 Siemens Nixdorf Informationssysteme Aktiengesellschaft Fixing station for an electrophotographic printing or copying apparatus
DE4209520C1 (fr) * 1992-03-24 1993-04-08 Siemens Nixdorf Informationssysteme Ag, 4790 Paderborn, De
US5481350A (en) * 1993-04-12 1996-01-02 Ricoh Company, Ltd. Heat roller fixing device divided into first and second frames and with positioning members of the first frame
DE4341882C1 (de) * 1993-12-08 1994-11-10 Siemens Nixdorf Inf Syst Thermo-Druckfixierstation mit verschleißarmen Fixierwalzenantrieb
JPH0990801A (ja) * 1995-09-20 1997-04-04 Ricoh Co Ltd 定着装置における駆動装置
JPH11219056A (ja) * 1997-10-23 1999-08-10 Ricoh Co Ltd 定着装置
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DE10219845C1 (de) * 2002-05-03 2003-11-20 Koenig & Bauer Ag Siebdruckmaschine und Siebzylinder
CN103034105B (zh) * 2009-01-08 2015-10-28 株式会社理光 固定墨粉图像的定影单元
US8249486B2 (en) 2009-01-08 2012-08-21 Ricoh Company, Ltd. Fixing unit, roller replacement auxiliary tool of fixing unit, and image forming apparatus
JP5593656B2 (ja) * 2009-01-08 2014-09-24 株式会社リコー 定着装置、定着装置のローラ交換補助具、定着装置のローラ交換方法、画像形成装置
JP5428470B2 (ja) * 2009-03-31 2014-02-26 株式会社リコー 定着装置およびそれを備えた画像形成装置
JP5402408B2 (ja) * 2009-08-31 2014-01-29 株式会社リコー 定着装置用ローラ、定着装置、画像形成装置、定着装置のローラ交換補助具、定着装置のローラ交換方法
JP5589370B2 (ja) * 2009-12-09 2014-09-17 富士ゼロックス株式会社 定着装置および画像形成装置
JP5532963B2 (ja) 2010-01-27 2014-06-25 株式会社リコー 定着装置ならびにそれを備えた画像形成装置
JP5493921B2 (ja) * 2010-01-29 2014-05-14 株式会社リコー 定着装置のローラ交換補助具
JP5423448B2 (ja) * 2010-02-05 2014-02-19 株式会社リコー 定着装置の部品交換補助具
CN106164633B (zh) * 2014-04-11 2019-10-18 利乐拉瓦尔集团及财务有限公司 包含用于感测包装材料温度的温度传感器的辊装置
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103333A1 (de) * 2012-04-17 2013-10-17 Océ Printing Systems GmbH & Co. KG Digitaldrucker zum Bedrucken eines Aufzeichnungsträgers

Also Published As

Publication number Publication date
EP0505404A1 (fr) 1992-09-30
DE59005966D1 (de) 1994-07-07
JPH05504633A (ja) 1993-07-15
WO1991009351A1 (fr) 1991-06-27
US5301000A (en) 1994-04-05

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