CN101038468A - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

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Publication number
CN101038468A
CN101038468A CNA2007100883300A CN200710088330A CN101038468A CN 101038468 A CN101038468 A CN 101038468A CN A2007100883300 A CNA2007100883300 A CN A2007100883300A CN 200710088330 A CN200710088330 A CN 200710088330A CN 101038468 A CN101038468 A CN 101038468A
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China
Prior art keywords
image
transfer
paper
unit
fixing roller
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Granted
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CNA2007100883300A
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Chinese (zh)
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CN101038468B (en
Inventor
薮田纯子
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Sharp Corp
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Sharp Corp
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Priority claimed from JP2006088958A external-priority patent/JP4680812B2/en
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Publication of CN101038468B publication Critical patent/CN101038468B/en
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  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

The image forming apparatus of the present invention includes a first and a second main conveyance path, a first and a second processing unit, a transfer unit, and a fixing unit. The first and second main conveyance paths come together after having branched apart between a paper supply unit and a paper delivery unit. A recording medium is selectively conveyed along either one of the first and second main conveyance path. Image formation is performed by a method of electrophotography by, alternatively, either the first or second processing unit. Between the first and second main conveyance paths where they are branched apart, the transfer unit generates a transfer electric field between itself and one or the other of the first and second processing unit. The fixing unit controls the temperature of a first or a second fixing roller, which are disposed in the first and second main conveyance path after they have come together, alternatively.

Description

Image processing system
Cross reference
This non-provisional application requires respectively on March 15th, 2006 and 28 days 2006-071253 number and the right of priority of 2006-088958 patented claim in Japan's submission based on 35U.S.C. § 119 (a), and the full content of these two patents is combined in herein as a reference thus.
Technical field
The present invention relates to a kind of image processing system that on recording medium, forms view data by method of electrophotography.
Background technology
Can form the image processing system that to carry out coloured image formation again by fill order's color image as a kind of, propose combination picture and formed device, for example Jap.P. discloses among the flat 08-183174 or Jap.P. discloses among the 2002-192708 disclosed such, wherein, consider the characteristics of every kind of image forming method and consider the environment for use of coloured image, image formation unit forms by method of electrophotography fill order color image, and image formation unit is carried out coloured image formation by the method for ink-jet.
When utilization forms monochrome image and coloured image as the device of the described combination picture formation of technology formerly on single recording medium, have the significant difference of picture quality between monochrome image that forms by electrophotographic method and the coloured image by ink ejecting method formation, this has just caused the sense of discomfort about image visual.
Thus, consider that monochrome image forms the raising of processing speed, in order to be created on the image that does not have sense of discomfort when mixing as the monochrome image of single image and coloured image, consider to provide monochrome image to form unit and coloured image formation unit, these two kinds of image formation units all form image by method of electrophotography.
Yet, if provide monochrome image to form unit and same coloured image formation unit simply by electrophotographic method work by electrophotographic method work, because the quantity of the ingredient of device has increased, can make the device size increase and make its cost that sizable increase be arranged.In addition, the transfer path that is used for recording medium becomes more complicated, and the operating performance deterioration of task such as relevant eliminating paperboard.
The purpose of this invention is to provide a kind of image processing system, this image processing system can use some two parts that image formation unit is shared, wherein two image formation units all come work by method of electrophotography, thereby make the more miniaturization of this image processing system, reduce the quantity of ingredient, simplify transfer path, and improve operability.
Summary of the invention
Image processing system of the present invention comprises transfer path, first and second processing units, transfer printing unit and fixation unit.Transfer path is formed between paper feeding unit and the paper feeder unit, and comprises the first and second main transfer paths, and the first and second main transfer paths separately then are incorporated into together again at a part place.According to view data, optionally the paths in the first main transfer path and the second main transfer path transmits recording medium.And,, alternately, come carries out image to form by method of electrophotography by in first processing unit or second processing unit any one according to view data.The place that between the first and second main transfer paths they separate, transfer printing unit generates transfer electric field, according to view data, between one of the two in transfer printing unit and first processing unit and second processing unit of this electric field.Alternately, according to view data, these two main transfer paths that the fixing temperature of fixing unit controls first fixing roller or second fixing roller, these two fixing rollers are disposed in the first and second main transfer paths have convergeed to later together place.
Description of drawings
Fig. 1 is the synoptic diagram that has shown the structure of image processing system according to an embodiment of the invention;
Fig. 2 A is the figure of the original state of the pass gate (three way gate) that shown image processing system;
Fig. 2 B is the figure that has shown the state of pass gate when the direction of discharging transfer path along second paper transmits a piece of paper of this image processing system;
Fig. 2 C is the figure that has shown the state of pass gate when the direction of discharging transfer path along first paper transmits a piece of paper of this image processing system;
Fig. 2 D is the figure that has shown the state of pass gate when the direction of discharging transfer path along second paper transmits a piece of paper of this image processing system;
Fig. 3 A shown during dual-side image forms, when the direction of discharging transfer path along first paper transmits a piece of paper, and the figure of the state of this image processing system;
Fig. 3 B shown during dual-side image forms, and discharged transfer path when transmitting, the figure of the state of this image processing system when this paper goes back to towards second paper;
Fig. 3 C shown during dual-side image forms, when this paper when auxiliary transfer path is transmitted, the figure of the state of this image processing system;
Fig. 3 D shown during dual-side image forms, when this paper for the second time when processing unit is transmitted, the figure of the state of this image processing system;
Fig. 4 is the figure of detailed formation that has shown the transfer printing unit of image processing system;
Fig. 5 is the figure that has shown the operation of the embodiment of image processing system of the present invention during coloured image forms;
Fig. 6 is the figure that has shown the operation of the embodiment of image processing system of the present invention during monochrome image forms;
Fig. 7 is the front view as the fixation unit of fixing device;
Fig. 8 is the side view of fixation unit;
Fig. 9 is the block diagram of the control module of image processing system;
Figure 10 is the process flow diagram of the treatment step of indicative control unit during colored and monochrome image form;
Figure 11 is the process flow diagram that is presented at by the details of the surface temperature control during the control module execution treatment step;
Figure 12 is presented at the figure that is carried out the state during coloured image forms by fixation unit;
Figure 13 is presented at the figure that is carried out the state during monochrome image forms by fixation unit;
Figure 14 is presented at during the coloured image formation figure of the operation of image processing system according to another embodiment of the present invention;
Figure 15 be presented at monochrome image and form during, according to the figure of the operation of this image processing system of this another embodiment of the present invention; With
Figure 16 be presented at colored and monochrome image formation during, the process flow diagram of the treatment step that is undertaken by this image processing system according to this another embodiment of the present invention.
Embodiment
Below, with the image processing system that is described in detail with reference to the attached drawings according to several preferred embodiments of the present invention.Fig. 1 is the synoptic diagram that shows the structure of image processing system 100 according to an embodiment of the invention.This image processing system comprises scanning element 200, color processing unit 300 (first processing unit), monochromatic processing unit 400 (second processing unit), transfer printing unit 500, fixation unit 600, paper feeding unit 700, first paper feeder unit 800 and second paper feeder unit 900.
As an example, scanning element 200 is disposed in the topmost of image processing system 100.Color processing unit 300 and monochromatic processing unit 400 are disposed in along on the straight line of the horizontal direction of image processing system 100 center sections.In addition, transfer printing unit 500 and fixation unit 600 are disposed between color processing unit 300 and the monochromatic processing unit 400.Fixation unit 600 is disposed on the transfer printing unit 500.
Paper feeding unit 700 is disposed in the foot of image processing system 100, and deposits various types of paper, and during image formed, it offered processing unit 300,400 with these paper.These paper types that constitute recording medium can comprise, for example, and common paper, recycled writing paper, OHP transparency, such as ground paper, the envelope of postcard etc., or the like.First paper feeder unit 800 is disposed between scanning element 200 and the color processing unit 300.Second paper feeder unit 900 is disposed in the right side of monochromatic processing unit 400.
The first main transfer path 1100 and the second main transfer path 1200 are defined as, from paper feeding unit 700, through transfer printing unit 500 and fixation unit 600, till first branching portion 1300.The first main transfer path 1100 is through color processing unit one side of transfer printing unit 500.The second main transfer path 1200 is through monochromatic processing unit 400 1 sides of transfer printing unit 500.
First row's paper transfer path 1400 is defined as, from first branching portion, 1300 to first paper feeder units 800.Second row's paper transfer path 1600 is defined as, since first branching portion 1300 through second branching portion, 1500 to second paper feeder units 900 till.In addition, auxiliary transfer path 1700 is defined as, since second branch units 1500, till between paper feeding unit 700 and the transfer printing unit 500.
Except passing through the relative both sides of transfer printing unit 500, the first main transfer path 1100 has been taked identical route with the second main transfer path 1200." transfer path " that first main transfer path 1100, the second main transfer path 1200, first row's paper transfer path 1400, second row's paper transfer path 1600 are equivalent in the claim.
Scanning element 200 comprises first document board 201, second document board 202, the first reflective mirror base 203, the second reflective mirror base 204, lens 205 and ccd sensor 206.First document board 201 and second document board 202 are made by the Bohemian glass parts.By manual operation or by not shown Automatic Document Feeder, the original copy that will read its image is placed on the upper surface of first document board 201.Perhaps, by unshowned Automatic Document Feeder in the accompanying drawing, make above the upper surface of original copy by second document board 202 that will read its image.
The first reflective mirror base 203 is supporting the lamp 207 and first reflective mirror 208.The second reflective mirror base 204 is supporting second reflective mirror 209 and the 3rd reflective mirror 210.When reading in the image that is placed in the original copy on first document board, 201 upper surfaces, the first reflective mirror base 203 and the second reflective mirror base 204 move in the horizontal direction along the lower surface of first document board 201.At this moment, the second reflective mirror base 204 moves with a half speed of the first reflective mirror base 203.And when reading in the image of the original copy by second document board, 202 upper surfaces tops, the first reflective mirror base 203 is parked in second position of document board below 202.
Lamp 207 with irradiate light to the original image surface.Reflective mirror 208 to 210 makes light that the original image surface reflected towards lens 205 deflections.Lens 205 make reflection ray imaging on the sensitive surface of ccd sensor 206.The corresponding light signal that is subjected to of light quantity of the light that CCD 206 outputs receive with it.Be subjected to after light signal Be Controlled unit 110 (will be described below) converts numerical data at this, this is handled through predetermined picture by light signal, is stored as view data then.
Color processing unit 300 perhaps based on the color image data from the outside input, forms coloured image based on the view data that is scanned the colored original that reads in unit 200.This color processing unit 300 comprises photosensitive drums 311A to 311D, Charging system 312A to 312D, exposing unit 313, developing apparatus 314A to 314D, transfer device 315A to 315D, clearer 316A to 316D, intermediate transfer belt 317 and stores black groove (toner hopper) 321A to 321D.
In this color processing unit 300, defined four treating stations 330A to 330D, wherein each treating stations forms the image of different tones.These treating stations 330A to 330D forms the image of black image and green grass or young crops, magenta and yellow hue respectively, wherein blue or green, pinkish red and yellow three primary colors for losing lustre and mixing.
The treating stations 330A that forms black image comprises photosensitive drums 311A, Charging system 312A, developing apparatus 314A, transfer device 315A, clearer 316A and stores black groove 321A.Photosensitive drums 311A has the photographic layer around its circumferential surface, and rotates with the clockwise direction among Fig. 1.Charging system 312A makes the circumferential surface of photosensitive drums 311A charged equably.
The laser that exposing unit 313 usefulness have been modulated based on the view data of each tone exposes to each photosensitive drums among the photosensitive drums 311A to 311D.The circumferential surface of the photosensitive drums 311A of process Charging system 312A charging is being exposed on main direction of scanning by the laser corresponding with black image data, and wherein main direction of scanning is parallel to the axial of photosensitive drums 311A.Because the exposure of this laser generates and the corresponding electrostatic latent image of black image data on the circumferential surface of photosensitive drums 311A.
Developing apparatus 314A is provided to black toner the circumferential surface that generates the photosensitive drums 311A that this electrostatic latent image is arranged on its circumferential surface like this.Thereby the electrostatic latent image on the photosensitive drums 311A circumferential surface is developed to toner image by this black toner.
Intermediate transfer belt 317 is equivalent to " first image carries and holds body " in the claim and is the endless belt of extend through driven roller 318, driven voller 319 and idler roller 320.Because the rotation of driven roller 318, this intermediate transfer belt 317 rotates according to the sequential loop through treating stations 330D, treating stations 330C, treating stations 330B and treating stations 330A.
In treating stations 330A, intermediate transfer belt 317 is through between photosensitive drums 311A and the transfer device 315A.Transfer device 315A uploads the black toner image of holding with photosensitive drums 311A circumferential surface and is transferred on the surface of intermediate transfer belt 317.
Clearer 316A removes the toner that remains on the photosensitive drums 311A circumferential surface after photosensitive drums 311A is relative with intermediate transfer belt 317 from the circumferential surface of photosensitive drums 311A.
Storing black groove 321A stocks and is useful on the black toner that replenishes to developing apparatus 314A.The quantitative change of the black toner in developing apparatus 314A after a little while, then black toner via not shown additional path from store black groove 321A by being added among the developing apparatus 314A.Store except the developing apparatus 314A to 314D for the treatment of stations 330A to 330D and its and to have stocked among black groove 321A to 321D this fact of the mutually different toner of tone, treating stations 330A has identical structure to 330D.As the situation for the treatment of stations 330A, in each treating stations of 330D, green grass or young crops, magenta or yellow toner image are transferred on the surface of intermediate transfer belt 317 equally at treating stations 330B.The toner image of these Huangs, magenta, green grass or young crops and black is transferred to by treating stations 330A to the surface of the intermediate transfer belt 317 of 330D successively by a folded ground, has so just formed panchromatic toner image.
Monochromatic processing unit 400 perhaps based on the view data from the outside input, forms monochrome image based on the view data of original copy (being read in by scanning element 200).This monochrome processing unit 400 comprises photosensitive drums 411, Charging system 412, exposing unit 413, developing apparatus 414, clearer 417 and stores black groove 417.
Photosensitive drums 411 is equivalent to " second image carries and holds body " in the claim, has photographic layer on its circumferential surface, and rotates with the clockwise direction among Fig. 1.Charging system 412 makes the circumferential surface uniform charged of photosensitive drums 411.The laser that exposing unit 413 usefulness were modulated based on view data is to the circumferential surface exposure of photosensitive drums 411.The circumferential surface of the photosensitive drums 411 of process Charging system 412 chargings is exposed with main direction of scanning according to view data by laser, and wherein this main direction of scanning is parallel to the axial of photosensitive drums 411.Because the exposure of this laser has formed the electrostatic latent image corresponding with view data on the circumferential surface of photosensitive drums 411.
Developing apparatus 414 offers black toner on the circumferential surface of the photosensitive drums 411 that has generated electrostatic latent image on its circumferential surface.Thereby the electrostatic latent image on photosensitive drums 411 circumferential surfaces is developed to toner image by this black toner.
Transfer device 415 is uploaded the black toner image of holding with photosensitive drums 411 circumferential surfaces and is transferred to through on the paper surface between transfer device 415 and the photosensitive drums 411.Clearer 416 from the circumferential surface of photosensitive drums 411 remove when photosensitive drums 411 with the toner that also remains in after paper is relative on photosensitive drums 411 circumferential surfaces.
Storing black groove 417 stocks and is useful on the black toner that replenishes to developing apparatus 414.The quantitative change of the black toner in developing apparatus 414 after a little while, then black toner via not shown additional path from store black groove 417 by being added in the developing apparatus 414.
Transfer printing unit 500 is set between color processing unit 300 and the monochromatic processing unit 400.Except above-mentioned transfer device 415, this transfer printing unit 500 also comprises: transfer device 501, travelling belt 502, driven roller 503 and driven voller 504.Transfer device 415 and transfer device 501 are columniform transfer roll, and respectively can be with rotating clockwise and counterclockwise among Fig. 1.Transfer device 415 and transfer device 501 can, for example, make, and they can be tabular by metal or electroconductive resin or the combination of the two, also can be roller.Transfer device 501 is equivalent to " first transfer device " in the claim, and similarly, transfer device 415 is equivalent to " second transfer device " of claim.
Transfer path comprises travelling belt 502 and forms the driven roller 503 and the driven voller 504 of " a plurality of roller " in the claim.Driven roller 503 is " first rollers " in the claim, and similarly, driven voller 504 is " second rollers " in the claim.Travelling belt 502 is bridge joint endless belt between transfer device 415, transfer device 501, driven roller 503 and driven voller 504.This travelling belt 502 has predetermined resistance value, and for example, its resistance value can be set at 1.0 * 10 8～1.0 * 10 13Ω cm.
Driven roller 503 is connected to the drive source (not shown), and is driven with clockwise direction among Fig. 1 or counter clockwise direction.As a feasible example, can use the engine of DC brushless or stepping engine as this drive source.During the coloured image that uses color processing unit 300 formed, driven roller 503 was driven with the clockwise direction among Fig. 1.Yet during the monochrome image that uses monochromatic processing unit 400 formed, driven roller 503 was driven with the counter clockwise direction among Fig. 1.Transfer device 415 pressurizeds and contacting with photosensitive drums 411 circumferential surfaces, travelling belt 502 is clipped between transfer device 415 and the photosensitive drums 411 simultaneously.Transfer device 501 pressurizeds and contacting with intermediate transfer belt 317, travelling belt 502 is clipped between transfer device 501 and the intermediate transfer belt 317 simultaneously.
The part that is clipped in the travelling belt 502 between transfer device 501 and the intermediate transfer belt 317 constitutes its first relative portion 512, and the surf zone of this first relative portion 512 on the side relative with intermediate transfer belt 317 of travelling belt 502 is apparent surfaces of this first relative portion 512.Transfer device 501 is positioned on the position of travelling belt 502 back sides one side at these first relative portion 512 places of travelling belt 502.And the part that is clipped in the travelling belt 502 between transfer device 415 and the photosensitive drums 411 has constituted the second relative portion 513 of travelling belt 502, and the surf zone of this second relative portion 513 on the side relative with photosensitive drums 411 of travelling belt 502 is apparent surfaces of this second relative portion 513.Transfer device 415 is positioned on the position of travelling belt 502 back sides one side at these second relative portion 513 places of travelling belt 502.
By utilizing this structure, just can increase the quantity of the delivery unit on the common transfer path that uses of two processing units; Therefore, be contemplated to, can make more miniaturization of connecting gear, can also shorten transfer path, reduce the number of building block, and improve the simplicity of using.
As an example, can will be installed on the paper feeding unit 700 for carton 701A to 701D.These all deposit the paper of the single size of predetermined number among the carton 701A to 701D each.Each of giving carton 701A to 701D is provided with pickup roller 711, feed roll 712 and separate roller 713.By the effect of these pickup rollers 711, feed roll 712 and separate roller 713, can be from ground of paper being supplied to the first main transfer path 1100 or the second main transfer path 1200 to arbitrary giving in the carton the carton 701A to 701D.
During coloured image formed, transfer device 501, was transferred to the full-color toner image on the intermediate transfer belt 317 on this paper when being arranged on the first relative portion 512 in first transfer path, 1100 ways at a piece of paper.And during monochrome image formed, transfer device 415, was transferred to the monochromatic toner image on photosensitive drums 411 circumferential surfaces on this paper when being arranged on the second relative portion 513 in second transfer path, 1200 ways at a piece of paper.
Fixation unit 600 comprises a pair of fixing roller 601 and 602, and they are equivalent to " first and second fixing rollers " in the claim.This fixing roller 601 and 602 is forced into together and is in contact with one another.And this fixing roller 601 and 602 pairs transfer printing have the paper heating of toner image, and to this paper pressurization, thus with toner image on the surface of paper.
The paper of process fixation unit 600 is branched off into along first row's paper transfer path 1400 transmission by first branch units 1300 and is discharged to first paper feeder unit 800, perhaps is branched to along second row's paper transfer path 1600 and transmits and be discharged to second paper feeder unit 900.During coloured image formed, the paper that is discharged to first paper feeder unit 800 was the imaging surface (discharges faces down) downwards of paper, and the paper that is discharged to second paper feeder unit 900 to be the imaging surface of paper make progress (towards last discharge).And during monochrome image formed, the paper that is discharged to first paper feeder unit 800 was the imaging surface upwards (towards last discharge) of paper, and the paper that is discharged to second paper feeder unit 900 is the imaging surface (discharge faces down) downwards of paper.
All to form on the two sides of paper during the dual-side image formation of image, pass through fixation unit 600 and finished the paper that one-sided image forms on it, after being gone back to, transmit and be directed in the auxiliary transfer path 1700 by second branch units 1500 along second row's paper transfer path 1600 by first row's paper transfer path 1400.
Second branch units 1500 is provided with rotatable row's paper door 1501.The attitude of this row's paper door 1501 is convertible, thereby convertible direction of transfer like this, can be directed to paper towards second paper feeder unit 900 or towards auxiliary transfer path 1700 and transmit.
Fig. 2 A to 2D is the zoomed-in view of first branch units 1300.Near these first branch units, 1300 central parts, be provided with rotatable pass gate 1301.Fig. 2 A has shown the original state of this pass gate 1301.This pass gate 1301 is provided with the flexible part of being made by resin sheet etc., and this flexible part is along to the right, extend with downward three directions left.
Fig. 2 B has shown the state when the paper that sends from fixation unit 600 this pass gate 1301 when the direction of second row's paper transfer path 1600 is transmitted.Pass gate 1301 is rotated in a clockwise direction from its original state shown in Fig. 2 A, thereby, from the paper that fixation unit 600 sends, the image on this paper by photographic fixing after, be directed into and enter in second row's paper transfer path 1600.
Fig. 2 C has shown the state when the paper that sends from fixation unit 600 pass gate 1301 when the direction of first row's paper transfer path 1400 is transmitted.Pass gate 1301 is rotated in the counterclockwise direction from its original state shown in Fig. 2 A, thereby, from the paper that fixation unit 600 sends, the image on this paper by photographic fixing after, be directed into and enter in first row's paper transfer path 1400.
Fig. 2 D has shown the state when the paper that goes back to transmission from first row's paper transfer path 1400 pass gate 1301 when the direction of second row's paper transfer path 1600 is transmitted.Pass gate 1301 is rotated in the counterclockwise direction from its original state, thereby, go back to the paper that sends from first row's paper transfer path 1400 and be directed into and enter second row's paper transfer path 1600.
By first branch units 1300, second branch units 1500, first row's paper transfer path 1400, second row's paper transfer path 1600 and the auxiliary transfer path 1700 are set for this image forming apparatus 100, can be during coloured image forms and monochrome image carries out that facing down of paper discharged during forming and towards on discharge, the dual-side image that can carry out in addition on the paper forms.
Fig. 3 A to Fig. 3 D has shown the paper delivery status during dual-side image forms.As shown in Figure 3A, a piece of paper S after toner image being transferred on first by color processing unit 300 or by monochromatic processing unit 400, is directed to from its original state along the pass gate 1301 that is rotated counterclockwise first row's paper transfer path 1400.The transfer roller (not shown) is set at the intermediate point place of first row's paper transfer path 1400, and it transmits paper S with left direction in scheming.Row's paper door 1501 is to be suitable for the attitude wait of this paper S guiding to auxiliary transfer path 1700.When the trailing edge of this paper S had passed through branch units 1300, shown in Fig. 3 B, the direction of transfer of the transfer roller in first row's paper transfer path 1400 was reversed, thereby this paper S is gone back to transmission toward second row's paper transfer path 1600.When this paper S arrived second branch units 1500, shown in Fig. 3 C, it was arranged 1501 guiding of paper door to auxiliary transfer path 1700, and shown in Fig. 3 D, it is transmitted towards its processing unit for the second time.Form by color processing unit 300 or by monochromatic processing unit 400 carries out image on the another side of paper S, this paper S then, on its two sides, all be formed with image after, finally be discharged to first paper feeder unit 800 or second paper feeder unit 900.
Fig. 4 is the figure that shows the detailed formation of transfer printing unit 500.This transfer printing unit 500 is to be used for toner image is transferred to device on the paper that is sent to the first relative portion 512 or second relative portion 513 places, and it comprises transfer device 415, transfer device 501, support component 505, high-voltage power supply 508 and moving-member 514.
The output terminal of high-voltage power supply 508 is connected to transfer device 501 and transfer device 415, thereby is the shared high-tension electricity of these transfer device supplies.High pressure output is used jointly by first and second transfer devices 501 and 415, so they can use the output transformer of high-voltage power supply jointly, thereby the circuit size of high-voltage power supply is minimized.
Driven roller 503 is connected to the engine 511 as drive source, thereby driven roller 503 can be with just or opposite spin.
Driven roller 503 is set at the downstream of the paper conveyance direction on the travelling belt 502, and ground connection.On the other hand, driven voller 504 is set at the upstream side of the paper conveyance direction on the travelling belt 502, and is configured to floating (electrically floating) state of electricity.After transfer printing was finished, therefore the surface potential of travelling belt 502 can be reduced near the ground potential, thereby by electrostatic attraction, the paper that transmits on the travelling belt 502 was peeled off from travelling belt 502.
Second roller 504 is set at the upstream side of the direction of transfer of travelling belt 502, and is configured to the floating state of electricity.Be in the floating state of electricity and be meant that it is free of attachment on any circuit with any selection of appointed, and also earth-free.Be placed in the floating state of electricity owing to be positioned at this roller 504 of upstream side, through the transfer device 501 of travelling belts 502 upstreams or transfer device 415 electric charges taking place from high-voltage power supply 508 moves and produces electric field, the paper of 700 supplies is electrostatically attracted on the travelling belt 502 from the paper feeding unit, transmits thereby just can carry out stable paper.
Support component 505 is supporting transfer device 501 and transfer device 415, makes that they are rotatably being supported, and this support component 505 is set between transfer device 501 and the transfer device 415.This support component 505 comprises the first shifting axle 505A, the second shifting axle 505B and back shaft 505C.Transfer device 501 and transfer device 415 are supported by the first shifting axle 505A, the first shifting axle 505A is between transfer device 501 and transfer device 415, make them to rotate freely, and the second shifting axle 505B is set at the central part of the length direction of the first shifting axle 505A.This second shifting axle 505B is supported movably on can left and right directions in the drawings.
Moving-member 514 comprises solenoid 506 and solenoid 507.Solenoid 506 and solenoid 507 are installed on the second shifting axle 505B.In moving-member 514, optionally drive solenoid 506 or solenoid 507 according to view data.Transfer device 501 and transfer device 415 move accordingly with the processing unit that carries out image is formed, so that one of them processing unit, promptly, a unit that will carries out image in first processing unit 300 and second processing unit 400 forms, pressurized and contacting with endless belt 502, that processing unit of forming of carries out image is not moved away from endless belt 502 places simultaneously.
The back shaft 505C that stretches out from the first shifting axle 505A center is configured to extend along the direction perpendicular to the plotting paper of Fig. 4, and this back shaft 505C supports by slotted hole 505D, and slotted hole 505D supports and is set in the frame part of image processing system 100.Support component 505 extends along the length direction of this slotted hole 505D, and moves under the effect of the driving force of solenoid 506 and solenoid 507.
The face contact power that 507 pairs of transfer devices 501 of solenoid 506 and solenoid and transfer device 415 apply constitutes a kind of like this face contact power, utilize this face contact Lik-Sang to become transfer area, the nip width of transfer area is that view data can be transferred to the width on the recording medium thereon.
Stop paper bowl 714 and clamp the paper that is fed in this transfer printing unit 500.
Fig. 5 and Fig. 6 show the constitutional diagram of moving transfer device 501 and transfer device 415 by moving-member.
Fig. 5 has shown when generating toner images with color processing unit 300 and toner image being transferred to situation on the paper.When (promptly by connection solenoid 506, to its power supply) and turn-off solenoid 507 (promptly, with its outage), in Fig. 5 on left the direction during mobile support component 505, transfer device 501 pressurizeds and contacting with intermediate transfer belt 317 then via travelling belt 502, simultaneously, transfer device 415 is moved away from photosensitive drums 411.Support component 505, solenoid 506 and 507 can be shared by two transfer devices 501 and 415, thereby can simplify the mechanism that is used for mobile transfer device 501 and 415, and simplify and be used to carry out mobile control.In addition, the tension force of travelling belt 502 is keeping constant before mobile transfer device 501 and 415 and during moving always, and this travelling belt never can relax.
Control engine 511 makes it with clockwise direction rotation driven roller 503 among Fig. 5.At this moment, first 509 as " direction of transfer conversion equipment " in the claim rotates in a counter-clockwise direction, thereby it is 700 that provide and convert the direction left of travelling belt 502 to by the direction of transfer that stops the paper that paper bowl 714 clamps to make from the paper feeding unit, makes paper transmit towards the first relative portion 512.By doing like this, when shared single transfer printing unit between two processing units, can simplify driving mechanism, and simplify drive controlling connecting gear.
Second 510 as " the direction of transfer change member " of claim rotates in a counter-clockwise direction, make through the first relative portion 512 and finished the direction of transfer of the paper of transfer process on it, become than fixing roller 601,602 be pressed together and the position that is in contact with one another more near the direction of fixing roller 601.During image that color processing unit 300 carries out forms, well heater 603 power supplies of control module 110 for being arranged on these fixing roller 601 inside, thereby the surface of fixing roller 601 is heated to predetermined temperature, and with toner fixing on paper surface.Be pressed together the position that is in contact with one another more near the direction of fixing roller 601 by by this way paper conveyance direction being converted to than fixing roller 601 and 602, can enter into that fixing roller 601 and 602 is pressed together and before the position that is in contact with one another at paper, in advance the heat that generates in the fixing roller 601 is offered paper, thereby improve the quality that photographic fixing is handled.
Fig. 6 has shown the situation when with monochromatic processing unit 400 generation toner images and execution this toner image being transferred to paper.When by turn-off solenoid 506 and connect solenoid 507 make support component 505 with Fig. 6 in to the right direction when moving, transfer device 501 is moved away from intermediate transfer belt 317, simultaneously, transfer device 415 pressurizeds and contacting with photosensitive drums 411 via travelling belt 502.
Control module 110 control engines 511 are so that with the rotation of the counter clockwise direction among Fig. 6 driven roller 503.At this moment, first 509 rotation in a clockwise direction as " conversion equipment " in the claim, thereby direction of transfer that provide from paper feeding unit 700 and that stopped the paper that paper bowl 714 clamps is converted into travelling belt 502 direction to the right, makes paper be transmitted towards the second relative portion 513.
Second 510 rotation in a clockwise direction as " modifier " in the claim, make through the second relative portion 513 and finished the direction of transfer of the paper of transfer process, become than fixing roller 601 and 602 be pressed together and the position that is in contact with one another more near the direction of fixing roller 602.During the image that monochromatic processing unit 400 carries out formed, control module 110 was to well heater 604 power supplies that are arranged on fixing roller 602 inside, thereby the surface of fixing roller 602 is heated to predetermined temperature, and made toner fixing to paper surface.Be pressed together the position that is in contact with one another more near the direction of fixing roller 602 by by this way paper conveyance direction being converted to than fixing roller 601 and 602, can be before paper enters into fixing roller 601 and 602 positions that are in contact with one another owing to pressure, in advance the heat that generates in the fixing roller 602 is offered paper, thereby improve the quality that photographic fixing is handled.
When transfer device 415 has been moved and has left photosensitive drums 411, distance between travelling belt 502 and the photosensitive drums 411 is become make the toner that remains on the photosensitive drums 411 can not be transferred to distance on the travelling belt 502, and this distance is not transferred on the photosensitive drums 411 electric charge that produces in this electric field by the electric field that transfer device 415 generates.In the same manner, when transfer device 501 moves to such an extent that leave intermediate transfer belt 317, distance between travelling belt 502 and the intermediate transfer belt 317 is become make the toner that remains on the intermediate transfer belt 317 can not be transferred to distance on the travelling belt 502, and this distance is not transferred on the intermediate transfer belt 317 electric charge that produces in this electric field by the electric field that transfer device 502 generates.Although any distance all is acceptable, the distance of 3～5mm is suitable in the actual conditions.When transfer device 501 and transfer device 415 are applied common transfer voltage, although two transfer devices 501 and 415 generate electric field simultaneously, but useless electric charge can not be transferred on the processing unit of not carrying out any transfer process, or does not carry out on the part of the travelling belt 502 on processing unit one side of any transfer process.In addition, the toner that can avoid remaining on the processing unit of not carrying out any transfer process is transferred on the travelling belt 502, thereby has avoided pollution travelling belt 502.
Color processing unit 300 and monochromatic processing unit 400 be different aspect its print processing speed, and in fact, and monochromatic processing unit 400 is configured to the print processing speed slower than color processing unit 300.Control engine 511, and the transfer rate of control travelling belt 502 make its print processing speed separately with each processing unit consistent.
Fig. 7 is the front view of fixation unit 600.This fixation unit 600 comprises fixing roller 601 and 602.Fixation unit 600 also comprises primary heater 603A and 604A, secondary heater 603B and 604B, external heating roller 605A and 605B, thermistor 606A and 606B, separation claw 607A and 607B, cleaning unit 608 and 609, and guide plate 610.
Fixing roller 601 and fixing roller 602 are " first and second fixing rollers " in the claim, and they are cylindrical.Primary heater 603A and secondary heater 603B are installed in fixing roller 601 inside, and come heat fixing roll 601 from the inside of fixing roller 601.Primary heater 604A and secondary heater 604B are installed in fixing roller 602 inside, and come heat fixing roll 602 from the inside of fixing roller 602. External heater 605A and 605B with heater housing in columniform external member.External heater 605A touches the part of fixing roller 601 circumferential surfaces, and the circumferential surface of heat fixing roll 601.External heater 605B touches the part of fixing roller 602 circumferential surfaces, and the circumferential surface of heat fixing roll 602.Primary heater 603A and secondary heater 603B are " primary heaters " in the claim, and primary heater 604A and secondary heater 604B are " secondary heaters " in the claim.
Thermistor 606A and thermistor 606B detect the temperature of fixing roller 601 and fixing roller 602 respectively, and output detection signal.Separation claw 607A and separation claw 607B peel off paper respectively from the circumferential surface of fixing roller 601 and fixing roller 602.
Cleaning unit 608 and cleaning unit 609 are " first and second cleaning members " in the claim.Cleaning unit 608 comprises feed rolls 608A, winding roller (take up roller) 608B, pressure roll 608C, idler roller 608D, another idler roller 608E and web sheet (web sheet) 608F.Feed rolls 608A takes in the unused portion of the web sheet 608F that rolls.Winding roller 608B rolled it after web sheet 608F is used.Pressure roll 608C pressurized and touch the part of fixing roller 601.
Web sheet 608F passes through idler roller 608D, pressure roll 608C and idler roller 608E successively from feed rolls 608A, is twisted on the winding roller 608B then.Idler roller 608D and idler roller 608E apply tension force to web sheet 608F.When web sheet 608F through between pressure roll 608C and the fixing roller 601 time, it wipes foul and dust such as the toner that is attached on fixing roller 601 circumferential surfaces or paper powder.
Similarly, cleaning unit 609 comprises feed rolls 609A, winding roller 609B, pressure roll 609C, idler roller 609D, another idler roller 609E and web sheet 609F.Feed rolls 609A takes in the unused portion of the web sheet 609F that rolls.Winding roller 609B rolled it after web sheet 609F is used.Pressure roll 609C pressurized and contact the part of fixing roller 601.
Web sheet 609F passes through idler roller 609D, pressure roll 609C and idler roller 609E successively from feed rolls 609A, is twisted on the winding roller 609B then.Idler roller 609D and idler roller 609E apply tension force to web sheet 609F.When web sheet 609F through between pressure roll 609C and the fixing roller 602 time, it wipes foul and dust such as the toner that is attached on fixing roller 602 circumferential surfaces or paper powder.
Each assembly that comprises in the cleaning unit 608 is all identical with the corresponding assembly that comprises in the cleaning unit 609, and cleaning unit 608 and cleaning unit 609 be formed in the both sides of paper transport path symmetrically, and this paper transport path is clipped between them.Thereby the number that is necessary for the assembly that fixation unit 600 provides by such minimizing makes more compact structure, can anticipate the minimizing of cost.
Wipe foul and dust by web sheet 608F and 609F from fixing roller 601 and 602, can prevent stained to through the paper between fixing roller 601 and the fixing roller 602.Among web sheet 608F and 609F, the impregnated separant of web sheet 608F at least with silicone oil etc.Web sheet 608F is applied to this separant on the circumferential surface of fixing roller 601.Thereby cleaning unit 608 has also played the effect of " coating parts " in the claim.
When paper through between fixing roller 601 and the fixing roller 602 time, be transferred to the coloured image that the multilayer toner on this paper forms and be pressed and contact with the circumferential surface of fixing roller 601 by color processing unit 300.Owing on the circumferential surface of fixing roller 601, be coated with separant, be attached on the circumferential surface of fixing roller 601 with regard to the toner of having avoided when paper passes through between fixing roller 601 and the fixing roller 602, forming this coloured image.
Should be understood that with release agent soaking web sheet 609F also be acceptable, this toner that can avoid equally being transferred on the paper by monochromatic processing unit 400 is attached on the circumferential surface of fixing roller 602.
Guided plate 610 is disposed between transfer printing unit 500 and the fixation unit 600.This guide member 610 roughly is writing board shape, and can freely swing around axle 611, and axle 611 extends along the direction (by the direction shown in the arrow Y) vertical with paper conveyance direction.With counter clockwise direction or clockwise direction swing among Fig. 2, the direction of transfer deflection that makes the paper that passes through transfer printing unit 500 is to fixing roller 601 1 sides or fixing roller 602 1 sides by respectively for this guide member 610.
Fig. 8 is the side sectional view of the fixation unit 600 of image processing system 100.The length along X-axis (paralleling with the direction perpendicular to paper conveyance direction) of fixing roller 601 and fixing roller 602 is configured to will grow than the minor face of the full-size (for example, A3 size) of the paper that transmits in this image processing system 100.The heating part of primary heater 603A and 604A is set at the place, middle part along this X-axis, and the heating part of secondary heater 603B and 604B is set at along the two-end part place of the scope of this X-axis.The scope that the heating part of primary heater 603A and 604A is provided with approximates the length of the minor face of the minimum dimension (for example, A4 size) of the paper of transmission in this image processing system 100 greatly.
External heater 305A and 305B approximate the length of fixing roller 601 and 602 greatly along the length of X-axis.
During forming image on the small size paper, can only drive primary heater 603A or primary heater 604A, to reduce power consumption.
The two end portions of fixing roller 601 is provided with spring 651A and 652A.Because the elastic force of this spring 651A and 652A makes fixing roller 601 deflection fixing rollers 602 1 sides.The two end portions of fixing roller 602 is provided with spring 651B and 652B.Because the elastic force of spring 651B and 652B makes fixing roller 602 deflection fixing rollers 601 1 sides.Utilize this structure, the circumferential surface pressurized of fixing roller 601 and fixing roller 602 and contacting at their part place of circumferential surface.
Fixing roller 601 and fixing roller 602 are made by identical materials, and are made into identical shaped.Therefore, they the two skin hardness is identical, and the crack between the two partly is roughly the plane.The paper of the crack part by this planar shaped between fixing roller 601 and 602 is heated and is pressurizeed.During coloured image forms and during the monochrome image formation, the state when paper process fixing roller 601 and fixing roller 602 is constant, makes paper to be transmitted with stable status, thereby can maintain the kilter that the image on the paper forms.
Should be understood that the crack between fixing roller 601 and the fixing roller 602 partly be the plane and under its situation roughly constant along the width on the whole zone of directions X, can omit spring 651A and 652A, perhaps omit spring 652A and 652B.
Fig. 9 is the block diagram of the structure of the display image control module 110 that forms device 100.This control module 110 comprises, scanning element driver 114, color processing unit driver 115, monochromatic processing unit driver 116, transfer printing unit driver 117, paper feeding unit drive 118, the first paper feeder unit driver 119 and the second paper feeder unit driver 120, and primary heater driver 121, secondary heater driver 122, first motor drive 123, second motor drive 124, solenoid driver 125, thermistor 606A and 606B or the like, all these is connected to CPU 111, and CPU 111 comprises ROM 112 and RAM 113.
CPU 111 is according to whole these drivers etc. of controlling of program that are stored among the ROM 112.The data of input and output this moment are stored among the RAM 113.Scanning element driver 114 is based on the driving data from CPU 111 output, drives such as the device that is included in engine in the scanning element 200 etc.Color processing unit driver 115 is based on the driving data from CPU 111 output, drives such as the device that is included in engine in the color processing unit 300, clutch coupling etc.Monochromatic processing unit driver 116 is based on the driving data from CPU 111 outputs, drives such as the device that is included in engine in the monochromatic processing unit 400, clutch coupling etc.
In addition, transfer printing unit driver 117 is based on the driving data from CPU 111 output, drives such as the device that is included in engine in the transfer printing unit 500 etc.Paper feeding unit drive 118 is based on the driving data from CPU 111 output, drives such as the device that is included in engine in the paper feeding unit 700, clutch coupling etc.The first paper feeder unit driver 119 is based on the driving data from CPU111 output, drives the device of the engine that is included in first paper feeder unit 800 etc.The second paper feeder unit driver 120 is based on the driving data from CPU 111 output, drives such as the device that is included in engine in second paper feeder unit 900 etc.
Thermistor 606A and the detected signal of 606B are input to CPU 111.Based on these detection signals from thermistor 606A and 606B, CPU 111 is to primary heater driver 121 and secondary heater driver 122 output driving data.
Primary heater 603A, secondary heater 603B and external heater 605A are connected to primary heater driver 121.Primary heater driver 121 drives primary heater 603A, secondary heater 603B and external heater 605A based on the driving data from CPU 111 outputs.Equally, primary heater 604A, secondary heater 604B and external heater 605B are connected to secondary heater driver 122.Secondary heater driver 122 drives primary heater 604A, secondary heater 604B and external heater 605B based on the driving data from CPU 111 outputs.
Make the engine 621 of fixing roller 601 rotations be connected to first motor drive 123.First motor drive 123 drives engine 621 based on the driving data from CPU 111 outputs.Equally, make the engine 622 of fixing roller 602 rotations be connected to second motor drive 124.Second motor drive 124 drives engine 622 based on the driving data from CPU 111 outputs.
Make the solenoid 623 of guided plate 610 swings be connected to solenoid driver 125.Solenoid driver 125 drives solenoid 623 based on the driving data from CPU 111 outputs.
Control module 110 also plays the effect of " driving converting unit " in the claim.When color processing unit 300 formed coloured image, CPU 111 was to primary heater driver 121, first motor drive 123 and solenoid driver 125 output driving data.And when monochromatic processing unit 400 formed monochrome image, CPU 111 was to secondary heater driver 122 and second motor drive, 124 output driving data.
Should be understood that for fixation unit 600 provides independent engine and two clutch couplinges also be acceptable, one of them clutch coupling is used for fixing roller 601, and another is used for fixing roller 602, and these clutch couplinges alternately are switched on or switched off.In this case, the state that switches on and off of two clutch couplinges can be changed during coloured image forms and between during the monochrome image formation.
The amount of the electric energy that primary heater 603A and 604A consume can be, for example, and 700W; The amount of the electric energy that secondary heater 603B and 604B consume can be, for example, and 200W; And the amount of the electric energy that external heater 605A and 605B consume can be, for example, and 300W.
During coloured image formed, CPU 111 drove primary heater 603A, secondary heater 603B and external heater 605A, and during monochrome image formed, CPU 111 drove primary heater 604A, secondary heater 604B and external heater 605B.Therefore, the amount of fixation unit 600 electric energy of consumption during image forms is no more than the nominal power level of image processing system 100.
The service data of the details of operation of unshowned operating unit in the presentation graphs is inputed to CPU111.In addition, comprise the view data that image forms request and can be imported into CPU 111 from external device (ED) via not shown interface.
Control module 110 control engines 511 are so that can be with the rotation of the clockwise direction among Fig. 4 driven roller 503.At this moment, as " conversion equipment " first 509 counterclockwise to be rotated, make from the paper feeding unit 700 supplies and stopping controlled paper converts to along the direction of transfer of the left direction of travelling belt 502 between the paper bowl 714, and this paper is transmitted towards the first relative portion 512.When single transfer printing unit is used by this way jointly by two processing units, the driving mechanism that can simplify connecting gear with and drive controlling.
Figure 10 is the process flow diagram that shows the control flow of being carried out by the control module of this image processing system 100.If image processing system 100 detects image and forms request (step S10), then to make and form request about this image be that monochrome image forms the judgement (step S20) that request or coloured image form request to CPU 111.
If determined it is that coloured image forms, begin control (that is, the power supply of well heater 603 being controlled) (step S25) so to the surface temperature of fixing roller 601.Be moved to their position (step S30) shown in Fig. 5 for first 509 and second 510, connect solenoid 506, and turn-off solenoid 507, thus transfer device 501 pressurizeds and via travelling belt 502 contact with intermediate transfer belt 317 (step S40).
Next, rotate driven roller 503 in a clockwise direction, and the sense of rotation and the rotational speed (step S50) of engine 511 are set, make that the transfer rate of travelling belt 502 is consistent with the image formation processing speed of color processing unit 300.If the operator provides the instruction that faces down and discharge in advance, so, for the paper that will finish photographic fixing is directed to first paper feeder unit 800, thereby pass gate 1301 rotates in a counter-clockwise direction its state shown in Fig. 2 C that is transformed into from its original state shown in Fig. 2 A.
On the other hand, if the operator orders in advance towards last discharge, so, for the paper that will finish photographic fixing is directed to second paper feeder unit 900, pass gate 1301 is in a clockwise direction from the rotation of its original state shown in Fig. 2 A, thereby is transformed into its state (step S55) shown in Fig. 2 B.And on a piece of paper, carry out coloured image formation and handle (step S60).Check the image formation request (step S70) that whether exists follow-up paper, and if exist so other image to form request, control flow turns back to step S20 so, and continue image formation and handle.If there is not such image to form request, control flow turns back to step S10 so, waits for next print request.
On the other hand, form, begin control (that is, the power supply of well heater 604 being controlled) (step S80) so fixing roller 602 surface temperatures if in step S20, be judged as monochrome image.Be moved into their position (step S90) shown in Fig. 6 for first 509 and second 510, turn-off solenoid 506, and connect solenoid 507, thereby transfer device 415 pressurizeds and via travelling belt 502 contact with the circumferential surface of photosensitive drums 411 (step S100).Next, rotate in a counter-clockwise direction driven roller 503, and the sense of rotation and the rotational speed of engine 511 are set, make the transfer rate of travelling belt 502 form processing speed consistent (step S110) with the image of monochromatic processing unit 400.
If the operator orders the discharge that faces down in advance, so, for the paper that will finish photographic fixing is directed to second paper feeder unit 900, pass gate 1301 is from the rotation of its original state clockwise direction shown in Fig. 2 A, thereby is transformed into its state shown in Fig. 2 B.On the other hand, if the operator orders in advance towards last discharge, so, for the paper that will finish photographic fixing is directed to first paper feeder unit 800, pass gate 1301 is counterclockwise rotated from its original state shown in Fig. 2 A, thereby is transformed into its state (step S115) shown in Fig. 2 C.And fill order's color image forms processing (step S120) on a piece of paper.Check the image formation request (step S130) that whether exists continued page, and if exist other such image to form request, control flow turns back to step S20 so, and continue image formation and handle.Other if there is no such image forms request, and control flow turns back to step S10 so, waits for next print request.
Figure 11 is presented at control module 110 to carry out during the treatment step, is used for the process flow diagram of the details of fixing roller surface temperature control.CPU 111 waits for that the image by the operation indication of operating unit forms order, waits for that perhaps the image of importing with view data from external device (ED) forms request (step S201).During these were pending, CPU 111 drove external heater 605A and 605B, makes the temperature of fixing roller 601 and 602 become the temperature at waiting time (step S202) that sets in advance.When input picture formed request, CPU 111 judged that the image that will generate is coloured image or monochrome image (step S203).
If the image that generates is a coloured image, CPU 111 drives primary heater 603A and secondary heater 603B so, and external heater 605A (step S4), makes the temperature of fixing roller 601 arrive predetermined fixing temperature.At this moment, CPU 111 stops to drive external heater 605B.
And, when the temperature of fixing roller 601 arrives predetermined fixing temperature (step S205), then CPU 111, not only drive engine 621 and rotate fixing roller 601 (step S206), also drive solenoid 623 and shake guided plate 610 (step S207), and utilize color processing unit 300 to carry out coloured image formation (step S208).The speed rotation that fixing roller 601 is complementary with the processing speed with color processing unit 300.
On the other hand, if the image that generates is a monochrome image, then CPU 111 drives primary heater 604A, secondary heater 604B and external heater 605B (step S209), makes the temperature of fixing roller 602 arrive predetermined fixing temperature.At this moment, CPU 111 stops to drive external heater 605A.
And, when the temperature of fixing roller 602 arrives predetermined fixing temperature (step S210), CPU 111 so, not only drive engine 622 and rotate fixing roller 602 (step S211), also utilize monochromatic processing unit 400 fill order's color images to form (step S212).At this moment, CPU111 does not drive any solenoid.The speed rotation that fixing roller 602 is complementary with the processing speed with monochromatic processing unit 400.
After the processing of step S204 to S208, or after the processing of step S209 to S212, next, CPU 111 judges whether to exist the successive image data (step S213) that are used for image formation.And the processing of CPU 111 repeated execution of steps S4-S8, the perhaps processing of step S209 to S212 is till other view data that is not used in image formation.When no longer having other view data that is used for image formation, CPU 111 turns back to waiting status.
At color processing unit 300 or monochromatic processing unit 400 waiting time of forming of carries out image not, external heater 605A and 605B are driven, and make fixing roller 601 and 602 rise to their waiting temperature.Utilize color processing unit 300 to form under the situation of coloured images, utilizing primary heater 603A, secondary heater 603B and external heater 605A to heat and the enamel contacted fixing roller 601 of paper surface of image of transfer printing.Touch fixing roller 602 with the opposite paper surface of the side of image of enameling of transfer printing, fixing roller 602 only is heated to its waiting temperature.The coloured image that like this, has been transferred on the paper is melted also photographic fixing reliably to paper.
On the other hand, utilizing monochromatic processing unit 400 to form under the situation of monochrome images, utilize primary heater 604A, secondary heater 604B and external heater 605B heat with transfer printing on the contacted fixing roller 602 of paper surface of monochrome image.The paper surface opposite with the side of monochrome image in the transfer printing touches fixing roller 601, and fixing roller 601 only is heated to its waiting temperature.The monochrome image that like this, has been transferred on the paper is melted also photographic fixing reliably to paper.
Waiting temperature is the temperature lower than fixing temperature.Forming under the situation of image on a large amount of paper continuously with color processing unit 300, it is acceptable that driving external heater 605B comes heat fixing roll 602, so that be applied to the heat of capacity continuous on the paper of fixation unit 600.In an identical manner, on a large amount of paper, forming under the situation of image continuously with monochromatic processing unit 400, it also is acceptable that driving external heater 605A comes heat fixing roll 601, so that be applied to the heat of capacity continuous on the paper of fixation unit 600.
Figure 12 be presented at coloured image and form during the front cross sectional view of state of major part of fixation unit 600.During color processing unit 300 carried out coloured image formation, when transmitting undersized paper, primary heater 603A and external heater 605A were driven; On the contrary, when transmitting large-sized paper, primary heater 603A, secondary heater 603B and external heater 605A are driven, and make fixing roller 601 be heated to its fixing temperature.Guided plate 610 makes the direction of transfer of paper deflect into fixing roller 601 1 sides, makes the enamel paper surface of image of transfer printing at first touch fixing roller 601.In addition, fixing roller 601 is driven by engine 621, and fixing roller 602 is driven by the rotation of fixing roller 601.
Be transferred to before coloured image on the paper arrives between fixing roller 601 and the fixing roller 602, it touches the surface of fixing roller 601, and the temperature of fixing roller 601 is than fixing roller 602 height.The paper that has a coloured image is imported into the preheat mode between fixing roller 601 and the fixing roller 602 like this.In addition, through after between fixing roller 601 and the fixing roller 602, paper becomes easily and to strip down from the surface of fixing roller 601.
Figure 13 be presented at monochrome image and form during the front cross sectional view of state of major part of fixation unit 600.During the monochrome image that is undertaken by monochromatic processing unit 400 formed, when transmitting undersized paper, primary heater 604A and external heater 605B were driven; On the contrary, when transmitting large-sized paper, primary heater 604A, secondary heater 604B and external heater 605B are driven, and make fixing roller 602 be heated to its fixing temperature.Guided plate 610 makes the direction of transfer of paper deflect to fixing roller 602 1 sides, and the paper surface of monochrome image at first touches fixing roller 602 in the feasible transfer printing.In addition, fixing roller 602 is driven by engine 622, and fixing roller 601 is driven by the rotation of fixing roller 602.
Be transferred to before monochrome image on the paper arrives between fixing roller 601 and the fixing roller 602, it touches the surface of fixing roller 602, and fixing roller 602 is than the temperature height of fixing roller 601.The paper that has a monochrome image is imported into the preheat mode between fixing roller 601 and the fixing roller 602 like this.In addition, through after between fixing roller 601 and the fixing roller 602, paper becomes easily and to strip down from the surface of fixing roller 602.
Control module 110 according to image fixing on through the first surface of the paper between fixing roller 601 and the fixing roller 602 still photographic fixing on its second surface, change and utilize in fixing roller 601 and the fixing roller 602 which when it carries out heat treated and pressurized treatments.Except these, control module 110 is gone back yes-no decision ground and is driven fixing roller 601 or fixing roller 602.
By doing like this, during coloured image formed, to the coloured image heating, and heat treated was mainly carried out by the fixing roller 601 of contact coloured image, simultaneously to coloured image pressurization, and pressurized treatments is mainly contacted fixing roller 601 by pressurized fixing roller 602 is carried out.On the other hand, during monochrome image formed, to the monochrome image heating, and heat treated was mainly carried out by the fixing roller 602 that touches monochrome image, simultaneously to monochrome image pressurization, and pressurized treatments is mainly contacted fixing roller 602 by pressurized fixing roller 601 is carried out.
Owing to used the single fixation unit 600 that comprises a pair of fixing roller 601 and 602, coloured image that can yes-no decision ground will be formed by color processing unit 300 or the monochrome image photographic fixing that is formed by monochromatic processing unit 400 are to the surface of paper.
In addition, during coloured image forms, drive and the contacted fixing roller 601 of coloured image, and during monochrome image forms, drive and the contacted fixing roller 602 of monochrome image.Thus, just can between the peripheral speed of the fixing roller of paper transfer rate and contact image one side, not produce difference, thereby can avoid image blurring.
Figure 14 and 15 is the figure of detailed formation that show the transfer printing unit 500 of image processing system according to another embodiment of the invention.This transfer printing unit 500 comprises transfer device 515, as support component and rotatably support the arm 516 of transfer device 515, as moving-member and be connected to arm 516 so that engine 517, travelling belt 502, driven roller 503 and the driven voller 504 that transfer device 515 is moved.Transfer device 515 is, for example, and transfer roll.Should be appreciated that transfer device 515 is conductive parts, and although be roller here, it also can be a plate-shaped member.Travelling belt 502, high-voltage power supply 508, driven roller 503 and driven voller 504 have the explanation identical functions with the front, therefore will omit the explanation to it.
Situation when forming toner images and being transferred to toner image on the paper with color processing unit 300 has been shown among Figure 14.Engine 517 rotates in a clockwise direction, make supporting the end of the arm 516 of transfer device 515 moves with left direction among Figure 14, and transfer device 515 pressurizeds and contacting with intermediate transfer belt 317 via travelling belt 502, simultaneously, transfer device 515 is moved and leaves photosensitive drums 411.And the color toner image on the intermediate transfer belt 317 is transferred on the paper that is sent to first relative portion 512 places.
On the other hand, situation when forming toner images and being transferred to it on paper with monochromatic processing unit 400 has been shown among Figure 15.Engine 517 rotates in a counter-clockwise direction, make supporting the end of the arm 516 of transfer device 515 moves with to the right direction among Figure 15, and transfer device 515 is moved and leaves intermediate transfer belt 317, simultaneously, and transfer device 515 pressurizeds and contacting with photosensitive drums 411 via travelling belt 502.And the monochromatic toner image on the photosensitive drums 411 is transferred on the paper that is sent to second relative portion 513 places.In this way, owing to transfer device 515 is used jointly by two processing units, so can make the transfer interpreter reason compacter and simpler.Figure 16 has shown the control flow performed according to the control module 110 of this image processing system of other embodiments of the invention.With previously described the same, so will omit explanation with the step of the Reference numeral identical to them with Figure 10.Yet step S200 is with the step of the Reference numeral different with Figure 10 with S210, now these steps will be described.In step S300, during coloured image formed, engine 517 rotate in a clockwise direction, and the end of the arm 516 of support transfer device 515 moves along left direction, so that set up the state of the device shown in Figure 14.On the contrary, in step S310, during monochrome image formed, engine 517 rotated in a counter-clockwise direction, and the end of supporting the arm 516 of transfer device 515 moves along to the right direction, so that set up the state of the device shown in Figure 15.
Although more than described structure of the present invention, but variant as described structure, color processing unit comprises four developing apparatuss and includes only single photosensitive drums, and utilizes and four kinds of colors are added to (four-wheel facture) also is acceptable on the intermediate transfer belt 317.In addition, color processing unit comprises four developing apparatuss and includes only single photosensitive drums, and utilizing data image with four kinds of colors to be added on the photosensitive drums, also is acceptable by the single transfer process method that this view data on the photosensitive drums is transferred on the paper that will be added to then.
At last, in the explanation to embodiments of the invention, all features all illustrate by way of example, and should not be considered to limitation of the present invention.Scope of the present invention is not by any characterizing definition of the foregoing description, but only define by the protection domain of claims.In addition, the equivalent of each element and the change in the reasonable proper range of claim also should be considered within the scope of the present invention in the claim.

Claims (10)

1. image processing system comprises:
The paper feeding unit of supply recording medium;
Deposit and finish the paper feeder unit that image forms the recording medium of handling;
Transfer path, recording medium is sent to described paper feeder unit along described transfer path from described paper feeding unit;
First and second processing units comprise that separately first and second images carry to hold body, carry to hold at described first and second images by developed image data to form toner image on the body;
Transfer printing unit, it carries toner image holds body and is transferred to just on the recording medium that described transfer path transmits from described first or second image; With
Fixation unit, it is with on the described recording medium of described toner image in the described transfer path, and described transfer path is between described transfer printing unit and described paper feeder unit;
Wherein, described transfer path comprises the first and second main transfer paths, and the described first and second main transfer paths separate between described paper feeding unit and described transfer printing unit, and converge to together between described transfer printing unit and described fixation unit;
Described image processing system also comprises the direction of transfer converting member, it is set on the described transfer path, and described direction of transfer converting member optionally will be sent to any paths the described first and second main transfer paths from the paper of described paper feeding unit supply according to described view data; And
Wherein:
Described first and second processing units be arranged such that described first and second images carry hold body respectively on the described first and second main transfer paths near each other;
Described first processing unit forms described toner image with the toner of multiple color;
Described second processing unit forms described toner image with single toner of planting color; And
Described transfer printing unit optionally carries to hold at himself and described first or second image according to described view data and generates transfer electric field between the body.
2. image processing system as claimed in claim 1 comprises that also direction of transfer changes parts, and its direction of transfer with described recording medium changes over towards described fixation unit from the described first and second main transfer paths.
3. image processing system as claimed in claim 1, wherein:
Described transfer path comprises travelling belt, and it is included in the endless belt in the described first and second main transfer paths, and a plurality of rollers of described travelling belt extend through and driven so that can be along the annular movement path movement by described a plurality of rollers; And
Described transfer printing unit is configured in the inboard of described mobile route.
4. image processing system as claimed in claim 3,
Wherein, described transfer printing unit comprises first and second transfer devices, and these two transfer devices are configured to carry near described first and second images respectively hold body.
5. image processing system as claimed in claim 3,
Wherein, described a plurality of roller comprises:
First roller, it is configured in the transfer path that the described first and second main transfer paths separate, and the described first roller ground connection; With
Second roller, it is configured in the described first and second main transfer paths and converges in together the transfer path, and described second roller is configured to the floating state of electricity.
6. image processing system as claimed in claim 3,
Also comprise drive source, it drives any roller in described a plurality of roller as follows: according to optionally the reverse sense of rotation of described a plurality of rollers of described view data.
7. image processing system as claimed in claim 3,
Wherein, described transfer printing unit comprises:
Support the support component of described first and second transfer devices; With
Moving-member, it moves described support component, so that with face contact power described endless belt being pressed into to carry with described first and second images holds that image that is formed with toner image in the body its and carry and hold body and contact, described face contact power is suitable for generating the transfer area that described toner image can be transferred on the described recording medium;
Wherein:
Described moving-member moves described support component, separates preset distance so that described first and second images are carried hold that image that does not form toner image in the body its to carry to hold body with described endless belt; And
Described preset distance is described first and second images to be carried hold in the body that image that does not form toner image on it carry to hold toner residual on the body can not be transferred to distance on the described endless belt by the electric field that described first or second transfer device forms, and is that the electric charge that generates in the described electric field can not be delivered to described first and second images and carries and hold that image that does not form toner image in the body its and carry the distance of holding body.
8. image processing system as claimed in claim 1,
Wherein, described fixation unit comprises:
First and second fixing rollers, described recording medium is through described first and second fixing rollers, in described first and second fixing rollers one mainly by heating the heat treated of carrying out described recording medium to described recording medium, and wherein another mainly by described recording medium being pressurizeed pressurized treatments to described recording medium;
First and second well heaters, it heats described first and second fixing rollers respectively; With
Drive converting unit, it on described recording medium is the toner image that the toner image that forms of described first processing unit or described second processing unit form according to being transferred to, and optionally drives described first or secondary heater.
9. image processing system as claimed in claim 7,
Also comprise first and second cleaning members, it cleans the surface of described first and second fixing rollers respectively.
10. image processing system as claimed in claim 7 has the symmetrical structure on the opposite side of described transfer path.
CN2007100883300A 2006-03-15 2007-03-15 Image forming apparatus Expired - Fee Related CN101038468B (en)

Applications Claiming Priority (6)

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JP2006071253A JP4463229B2 (en) 2006-03-15 2006-03-15 Image forming apparatus
JP2006071253 2006-03-15
JP2006-071253 2006-03-15
JP2006088958A JP4680812B2 (en) 2006-03-28 2006-03-28 Image forming apparatus
JP2006-088958 2006-03-28
JP2006088958 2006-03-28

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CN101038468B CN101038468B (en) 2010-12-01

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JP2011104802A (en) * 2009-11-13 2011-06-02 Sinfonia Technology Co Ltd Printer
JP5748053B2 (en) * 2011-06-23 2015-07-15 コニカミノルタ株式会社 Image forming apparatus

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