CN103226316B - The control method of image processing system and image processing system - Google Patents
The control method of image processing system and image processing system Download PDFInfo
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- CN103226316B CN103226316B CN201210566584.XA CN201210566584A CN103226316B CN 103226316 B CN103226316 B CN 103226316B CN 201210566584 A CN201210566584 A CN 201210566584A CN 103226316 B CN103226316 B CN 103226316B
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Abstract
The invention provides image processing system and control method thereof.Image processing system of the present invention comprises power supply unit, fixing device, power switch, storage part, fixing motor and drives transfer part.Power supply unit generates and service voltage.Fixing device comprises heating rotating body, well heater and pressurization rotary body.Power switch is the switch of the power supply for cutting off image processing system.Storage part stored record data, described record data representation makes power supply be cut off by the operation of power switch.Fixing motor, when storage part stores record data, is applied in and makes fixing motor start the electric power rotated with the first torque, when not storing, being applied in and making fixing motor start the electric power rotated with the second torque being less than the first torque.Drive transfer part to transmit the driving force of fixing motor, rotate to make pressurization rotary body and heating rotating body.According to image processing system of the present invention, when there occurs welding in fixing device, abort situation can be made to increase no longer further.
Description
Technical field
The present invention relates to and carry out fixing image processing system and the control method of this image processing system by carrying out heating pressurization to the paper transferred with toner image.
Background technology
In the image processing system of such as printer, compounding machine, duplicating machine, FAX device and so on, have that to make to be transferred in toner image on paper fixing and carry out the parts that print on paper.In this image processing system, be provided with fixing device, described fixing device comprises the heating rotating body of well heater and roller and so on, and described heating rotating body is heated by well heater and makes toner melting.So due to the fault of switch that is energized to well heater or the misoperation controlling the control circuit to well heater energising, the various reasons such as malfunctioning, the excessive temperature that the parts of such as roller and so in fixing device occur sometimes rises such exception.Therefore, the temperature preventing fixing device is when an exception occurs needed to continue to rise.
Such as, known fuser as described below.Specifically, known a kind of fuser, this fuser comprises: fixing roller, and built-in electric heating well heater also bears load in downward direction by backer roll; Fixing roller support unit, is formed by thermoplastic resin, and keeps fixing roller; Power-supply circuit, to electrothermal heater supply power; And power supply supply cutting unit, by the decline of fixing roller caused by the melting of fixing roller support unit, supply circuit of cutting off the electricity supply.According to said structure, when the temperature of fixing roller is to abnormal temperature, rib part melting, makes the fixing roller being carried out bearing load by backer roll mobile to loading direction (in downward direction).With above-mentioned movement linkedly, the connection between electrothermal heater and power-supply circuit be cut off.Accordingly, it is desirable to remove the parts of such as thermostat and so on and install to reduce costs.
As mentioned above, in image processing system, be provided with fixing device, described fixing device comprises: well heater, the heating rotating body utilizing the heat produced by well heater to heat toner image, execute stressed pressurization rotary body for being crimped on heating rotating body to toner image.In order to fully apply pressure to paper, be pressed against on heating rotating body by the pressurization rotary body that flexible raw material formed that has with flexible resin, such as silicon sponge and so on.Paper transferred with toner image passes through from the gap between heating rotating body and pressurization rotary body.Accordingly, toner image is heated and pressurized, thus is fixed on paper.
At this, when well heater is energized, if do not make heating rotating body and pressurization rotary body rotate, then the heat coming from heating rotating body only concentrates on the part (only contact portion temperature rises) crimped mutually with heating rotating body in pressurization rotary body.If continue this state, the temperature of the part contacted with heating rotating body in the rotary body that sometimes pressurizes can rise to the degree that resilient material is melted.If the fusing of pressurization rotary body, then a part (resilient material) for the pressurization rotary body after fusing can be attached on heating rotating body.Then, if temperature declines, then a part for the pressurization rotary body after fusing can be fixed on heating rotating body, makes heating rotating body become integrated such state (hereinafter referred to as welding) with pressurization rotary body.In order to prevent welding, when being energized to make heating rotating body to be become the condition of high temperature by heating to well heater, heating rotating body and pressurization rotary body are rotated.
But the power supply sometimes to image processing system or the motor that makes heating rotating body and pressurization rotary body rotate can be suddenly cut-off.Existing situation of having a mind to for it, also the situation that pin of stumbling etc. is accidental is had, when power lead is pulled out, when occurring to have a power failure or image processing system make a mistake in the circuit of power-supply system that comprises time etc. in situation, the power supply sometimes to image processing system or motor can be cut-off suddenly.
When power supply to motor is cut off suddenly, the heating rotating body be rotating and pressurization rotary body stop.Printing or under state in order to the temperature (in order to preheating) making heating rotating body be increased to preset to the larger electric power of heater fed, if there is the unexpected cut-out of power supply, sometimes welding is occurring.
If generation welding, then become the state that heating rotating body cannot rotate with pressurization rotary body.Though if cannot rotate because of welding, the motor being also used in the rotations such as heating rotating body carries out driving and applies driving force, then there are the following problems, and the damage of tooth and so on jumped by the gear that namely can occur for transmitting driving.And then owing to becoming the state of motor-locking, therefore make coil temperature rising etc. owing to flowing through larger current in the motor making heating rotating body and pressurization rotary body rotate, motor also likely breaks down.So, there are the following problems, if that is: not only there occurs welding, and drive transfer part to grade and all break down, then abort situation increases, and needs to repair on a large scale.
Moreover the technology involved by above-mentioned fuser is the technology making the rising of the temperature in fixing device stop before arriving uniform temperature.But, do not relate to the problem causing gear failure owing to applying driving force when there is welding.Therefore, cannot solve the problem.In addition, the technology involved by above-mentioned fuser also has a following aspect, that is, this technology is the technology making it possible to not arrange thermostat or Thermal Cutoffs.Therefore, allowable temperature rises to the high temperature of that degree of rib generation melting.But, if temperature rises, not only there is welding, also likely will comprise the resin component fusing of fixing device periphery, thus in image processing system, likely produce the damage that cannot repair.Therefore, if suppressed in minimal viewpoint from by damage, more problems in the technology involved by above-mentioned fuser.
Summary of the invention
In order to solve the problem, the image processing system involved by one aspect of the present invention comprises: power supply unit, fixing device, power switch, storage part, fixing motor and driving transfer part.Described power supply unit is connected with external power source, generates and supplies the voltage needed for action of image processing system.The well heater that described fixing device comprises heating rotating body, heated described heating rotating body by energising and have elastic layer and be crimped on described heating rotating body and form the pressurization rotary body in gap, makes paper transferred with toner image in described gap by fixing to carry out.Described power switch is the switch of the power supply for cutting off image processing system.Described storage part stored record data, described record data representation makes the power supply of image processing system be cut off by the operation of described power switch.Described fixing motor is when described storage part starts because image processing system switches on power, about the dump of the image processing system of last time, if described storage part stores described record data, then described fixing motor is applied in and makes described fixing motor start the electric power rotated with the first torque, described first torque is the torque capacity that can export, if described storage part does not store described record data, then described fixing motor is applied in and makes described fixing motor start the electric power rotated with the second torque being less than described first torque, rotate to make described heating rotating body and described pressurization rotary body.Described driving transfer part comprises multiple gear, and the driving force of described fixing motor is passed to the either or both in described pressurization rotary body and described heating rotating body, rotates to make described pressurization rotary body and described heating rotating body.The minimum torque that described fixing motor can make the described heating rotating body of non-welding and described pressurization rotary body rotate rotates as described second torque.
The control method of the image processing system of another aspect of the present invention comprises the following steps.Make the voltage needed for action of power supply unit synthetic image forming apparatus.To well heater energising to heat heating rotating body.The pressurization rotary body with elastic layer is crimped on described heating rotating body and forms gap.The paper transferred with toner image is made to pass through fixing to carry out in described gap.The dump of image processing system is accepted by power switch.Make storage part stored record data, described record data representation makes the power supply of image processing system be cut off by the operation of described power switch.When described storage part starts because image processing system switches on power, about the dump of the image processing system of last time, if described storage part stores described record data, then apply to make fixing motor start the electric power rotated with the first torque to described fixing motor, described first torque is the torque capacity that can export.If described storage part does not store described record data, then apply to make described fixing motor start the electric power rotated with the second torque being less than described first torque to described fixing motor.By driving transfer part, the driving force of described fixing motor being passed to the either or both in described pressurization rotary body and described heating rotating body, rotating to make described pressurization rotary body and described heating rotating body.The minimum torque that described fixing motor can make the described heating rotating body of non-welding and described pressurization rotary body rotate rotates as described second torque.
Accompanying drawing explanation
Fig. 1 is the cut-open view that printer arrangement is shown.
Fig. 2 is the block diagram of the hardware configuration that printer is shown.
Fig. 3 is the block diagram of structure for illustration of fixing device and control.
Fig. 4 illustrates the structure of power supply unit and the block diagram of power supply relation.
Fig. 5 illustrates the process flow diagram based on the treatment scheme when operation of power switch being cut off to printer power supply.
Fig. 6 is the process flow diagram of the flow process of thermal pretreatment when illustrating that the power supply of printer is switched in fixing device.
Embodiment
Below, Fig. 1 ~ Fig. 6 is used to be described embodiments of the present invention.In the following description, the printer 100 enumerated as image processing system is described for example.But each key elements such as the structure described in each embodiment, configuration not in order to limit scope of invention, and are only illustrative examples.
(summary of image processing system)
First, use Fig. 1 that the summary of the printer 100 involved by embodiment is described.Fig. 1 is the cut-open view of the structure that printer 100 is shown.
As shown in Figure 1, the printer 100 of present embodiment has the guidance panel 1 (being equivalent to reporting unit) being installed on side.In addition, printer 100 comprises sheet feed section 2, first transport portion 3a, image forming part 4, fixing device 5, second transport portion 3b etc. in inside.
First, as shown in Figure 1, guidance panel 1 is arranged at the front end of the arm 11 arranged in the upper right of printer 100.And guidance panel 1 has the liquid crystal display part 12 of the state of display printer 100, various message and setting picture.Liquid crystal display part 12 is the liquid crystal display part of touch panel formula (such as, resistive film mode).Guidance panel 1 realizes the effect as operating portion, and described operating portion is for accepting the setting of user to the print conditions such as the kind of the paper that printing uses and size etc., or the releasing of acceptance error state and the display to this error condition.In addition, the state of guidance panel 1 display device on liquid crystal display part 12 and points for attention, error message etc., and report to user.
As shown in Figure 1, sheet feed section 2 is configured at the lower inside of printer 100.Sheet feed section 2 has multiple carton 21 (being in FIG, the carton label symbol 21a of top, the carton label symbol 21B for below).Each carton 21 holds copy paper, various paper such as projection (OHP) sheet material, label paper etc.Paper feed roller 22 that the driving mechanisms (not shown) such as motor M 2 (with reference to figure 4) carry out rotating is provided with (in FIG in each carton 21, for the paper feed roller label symbol 22a of top, the paper feed roller label symbol 22b for below).Paper feed roller 22 rotates, and paper is passed out to the first transport portion 3a.
Then, the first transport portion 3a transport of sheets of paper in printer 100.The paper supplied by sheet feed section 2 is guided to image forming part 4 by the first transport portion 3a.Be provided with in the first transport portion 3a transport roller to 31,32 and resistance roller to 33 etc.Resistance roller makes to be transported the wait coordinate send opportunity near image forming part 4 (transfer roll 45) of the paper that comes to 33.
Image forming part 4 forms toner image according to the view data of the image that should be formed, and is transferred on paper.Specifically, image forming part 4 comprise photosensitive drums 41, be configured at charging part 42 around photosensitive drums 41, exposure portion 43, development section 44, transfer roll 45 and cleaning part 46 etc.
Photosensitive drums 41 has photographic layer on outer peripheral face, can carry toner image on the circumferential face, and carries out rotary actuation with the processing speed of regulation.Charging part 42 makes photosensitive drums 41 charge under certain current potential.Exposure portion 43, according to the picture signal (view data) of input, exports the laser beam illustrated with single dotted broken line, carries out scan exposure to the photosensitive drums 41 after charging, to form electrostatic latent image on the surface of photosensitive drums 41.Exposure portion 43 accepts the view data after implementing image procossing via control part 6 or image processing part 62, carries out scanning, exposing to photosensitive drums 41 irradiating laser according to view data.
Toner is supplied to photosensitive drums 41 by development section 44, and the electrostatic latent image that the side face to photosensitive drums 41 is formed develops.46 pairs, cleaning part photosensitive drums 41 is cleaned.Transfer roll 45 is crimped on photosensitive drums 41.And resistance roller coordinates the movement of the toner image formed to 33, paper is sent to the gap between photosensitive drums 41 and transfer roll 45.Then, the transfer printing voltage of regulation is applied to transfer roll 45.Accordingly, toner image is transferred on paper.
Fixing device 5 is configured at the further downstream side of ratio image forming part 4 on sheet conveying direction.Fixing device 5 carries out heating pressurization to the toner image be transferred on paper makes it fixing.And, fixing device 5 is formed primarily of warm-up mill 51 and backer roll 52, wherein, described warm-up mill 51 is as passing through well heater 50 (with reference to figure 3) by the heating rotating body heated, and described backer roll 52 is as the pressurization rotary body being crimped on described warm-up mill 51.And transferred with the paper of toner image being heated and pressurized by during gap between warm-up mill 51 and backer roll 52, its result, color image of adjusting is fixed on paper.In addition, the paper after fixing is towards the second transport portion 3b be arranged at above fixing device 5.
The side face of warm-up mill 51 is tubular or sleeve-shaped, is the metallic article of such as aluminium or iron and so on.Well heater 50 is built in warm-up mill 51.As long as well heater 50 can provide the parts of heat to warm-up mill 51 by energising.In the printer 100 of present embodiment, use halogen heater as well heater 50.In addition, well heater 50 also can be the parts heated warm-up mill 51 by heating wire or induction heating.On the other hand, backer roll 52 is the rollers on side face with the elastic layer be out of shape according to the shape of warm-up mill 51.Elastic layer is the resin of silicon sponge and so on.
The paper exported from fixing device 5 is transported by the second transport portion 3b, and described second transport portion 3b substantially horizontally extends from branch 34 towards the left surface of printer 100.Then, paper is output in the output pallet 36 of the left surface upper outside being arranged at printer 100 35 by outlet roller.Accordingly, image formation processing terminates.In addition, when performing duplex printing, the paper exported from fixing device 5 is once after from branch 34, to output, pallet 36 direction sends, the carriage direction of paper will go back to towards the right flank direction of printer 100.So paper passes through at branch 34, and be sent to below by duplex printing transport portion 3c, once again via the first transport portion 3a, delivered to resistance roller once again to 33.
(hardware configuration of printer 100)
Next, according to Fig. 2, the hardware configuration of the printer 100 involved by embodiment is described.Fig. 2 is the block diagram of the hardware configuration that printer 100 is shown.
As shown in Figure 2, the printer 100 involved by present embodiment has control part 6 in inside.Control part 6 comprises the CPU61 performing various calculation process and signal transacting and the image processing part 62 etc. view data being carried out to image procossing.Control part 6 makes CPU61 and image processing part 62 perform various process, and controls each portion of printer 100.
The power switch 7 that control part 6 be connected with the power supply (power to cut off and close primary power) in order to cut off printer 100 and be operated by user in order to opening power (in order to switch on power).Power switch 7 can be arranged at the side of printer 100, also can be used as hardkey and is arranged in guidance panel 1 grade.When user closes the power supply of printer 100, press power switch 7.Control part 6 identifies the instruction should cutting off the power supply of printer 100 made by power switch 7.In addition, even if powered-down switch 7 cut off the power supply of printer 100 by power switch 7, the parts such as the CPU61 in control part 6 are still energized (describing in detail below).
CPU61 is central operation treating apparatus, according to being stored in storage part 8 and the control program be unfolded, control data, setting data etc., carries out control and the computing in each portion of printer 100.Storage part 8 is made up of the combination of the Nonvolatile memory devices of such as ROM, flash ROM, HDD and so on the volatile storage of such as RAM and so on.Storage part 8 stores the control program, control data etc. of printer 100.In addition, about the present invention, when being made the instruction of the power supply that should cut off printer 100 by power switch 7, control part 6 makes storage part 8 stored record data in nonvolatile manner, and described record data represent the data being made the power supply of image processing system be cut off by the operation of power switch 7.
In addition, control part 6 is connected with guidance panel 1 grade, is identified in the setting that guidance panel 1 carries out.In addition, control part 6 makes the liquid crystal display part 12 of guidance panel 1 show the information of the state of expression printers 100 such as making a mistake, abnormal.
In addition, control part 6 is connected with Department of Communication Force 63.Department of Communication Force 63 is communication interfaces, this communication interface is used for communicating with computing machine 200 via network or cable or public line, and described computing machine 200 becomes the transmission source of the print data of setting data when comprising for carrying out the view data that prints and printing.Computing machine 200 is personal computer or server etc.Department of Communication Force 63 receives printing data from computing machine 200.
Image processing part 62 for the view data received from computing machine 200, implement to amplify according to setting, reduce, rotate, concentration conversion, the various image procossing such as Data Format Transform.Then, when performing print job, the view data after image procossing is delivered to exposure portion 43 by image processing part 62.Exposure portion 43 accepts this view data and carries out scanning and exposing.
In addition, control part 6 is connected in the mode that can communicate with as the engine part 20 performing the part printed, and described engine part 20 comprises sheet feed section 2, first transport portion 3a, image forming part 4, fixing device 5, second transport portion 3b, duplex printing transport portion 3c.Control part 6 controls the action of engine part 20, to make print execution.In addition, control part 6 also can be arranged to the form being divided into such as master control part and engine control portion and so on by function, described master control part performs overall control, image procossing and Control on Communication, described engine control portion performs control that toner image formed, the control of motor that various rotary body is rotated and sheet conveying control, and controls printing.
In addition, be provided with power supply unit 9 in printer 100, described power supply unit 9 uses power lead (not shown) to be connected with the socket of outside (civil power), the various voltages needed for the action of synthetic image forming apparatus.Control part 6 controls the action of power supply unit 9.In addition, the detailed content of power supply unit 9 will be explained later.
(structure of fixing device 5 and control)
Then, Fig. 3 is used to be described the structure of the fixing device 5 of the printer 100 involved by embodiment and control.Fig. 3 is the block diagram of structure for illustration of fixing device 5 and control.
As shown in Figure 1, Figure 3, about fixing device 5, main body side is provided with the fixing motor 64 for the warm-up mill 51 and backer roll 52 rotation making fixing device 5, and transfer part 101 is driven to the main body side that the driving of fixing motor 64 is transmitted.
Fixing motor 64 is drive sources of supply driving force, and described driving force rotates for making the warm-up mill 51 in fixing device 5 and backer roll 52.Fixing motor 64 is DC motors.In addition, fixing motor 64 is not to use DC motor, can be the motor except DC motor yet.And control part 6 controls torque and the rotational speed of fixing motor 64.In control part 6, be provided with circuit for controlling motor 65, described circuit for controlling motor 65 is as the driver controlled torque and the rotational speed of fixing motor 64.In addition, circuit for controlling motor 65 also can be arranged on outside control part 6.Circuit for controlling motor 65 to being applied to the size of voltage of fixing motor 64 and dutycycle and the amount of the electric current of flowing adjusts in fixing motor 64, to control the torque of fixing motor 64 and rotational speed.
In addition, the main body side in the main body of printer 100 drives transfer part 101 to comprise the gear train 1012 that multiple gear 1011 combines (engagement).In addition, conveniently, 1 gear 1011 is only illustrated in figure 3.Gear 1011 uses resin gears.
And fixing device 5 is unitized.As shown in figures 1 and 3, in the unit of fixing device 5, comprise warm-up mill 51, heater circuit 53, switching part 54, temperature sensor 55, backer roll 52, fixing side driving transfer part 102 etc.
First, in fixing device 5, be provided with the well heater 50 that warm-up mill 51 is heated.And, be provided with the heater circuit 53 for being energized to well heater 50.And the switching part 54 of such as three terminal bidirectional alternating-current switch and so on is connected to heater circuit 53, described switching part 54 switches the energising opened and closed to well heater 50.
And as shown in Figure 3, control part 6 also controls fixing device 5.Switching part 54 is connected with the well heater control signal wire HS coming from control part 6.Control part 6 (CPU61) utilizes this well heater control signal HS that heater-driven control signal is input to switching part 54, and described heater-driven control signal is the signal indicating the On/Off to the energising of well heater 50 to control.Accordingly, control to be performed to the On/Off control of the energising of well heater 50 and the output of well heater 50.
In addition, be provided with temperature sensor 55 in printer 100, described temperature sensor 55 to be configured in fixing device 5 and temperature for measuring warm-up mill 51.The output voltage of temperature sensor 55 is imported into control part 6.Temperature sensor 55 comprises the thermistor of contact with warm-up mill 51 (also can not contact).Because the resistance value of thermistor changes with temperature, therefore the output voltage of temperature sensor 55 changes along with the temperature of warm-up mill 51.The output voltage of control part 6 pairs of temperature sensors 55 carries out A/D conversion, identifies the temperature of warm-up mill 51 (fixing device 5) according to the size of output voltage.
Storage part 8 stores the tables of data of the corresponding relation between the size of the output voltage for representing temperature sensor 55 and the temperature of warm-up mill 51.So, control part 6 with reference to storage part 8 tables of data and identify the temperature of warm-up mill 51 according to the output voltage of temperature sensor 55.And control part 6 identifies the Current Temperatures of fixing device 5 (warm-up mill 51).Control part 6, after primary power is connected, except transferring to the battery saving mode of such as sleep pattern and so on the temperature of fixing device 5 to be remained except lower situation, utilizes heater-driven control signal to control the energising to well heater 50.Control part 6 carries out temperature control, and when performing print job to make to comprise, the temperature of warm-up mill 51 maintains fixing control temperature.The temperature of the warm-up mill 51 that so-called " fixing control temperature " should maintain when being and printing, and be applicable to carrying out fixing temperature (such as, about 180 DEG C to toner image.Different according to specification).Consider the material etc. of the melting characteristic of toner and warm-up mill 51, backer roll 52, fixing control temperature waits setting in advance by experiment according to the machine of image processing system.
Below the summary of the FEEDBACK CONTROL for maintaining fixing control temperature is described.If the temperature of control part 6 warm-up mill 51 when primary power is connected lower than fixing control temperature, is then energized to well heater 50, to heat warm-up mill 51.Afterwards, control part 6 is when the temperature identifying warm-up mill 51 according to the output voltage of temperature sensor 55 is higher than fixing control temperature, and the energising to well heater 50 is closed in instruction.Afterwards, when the temperature identifying warm-up mill 51 is lower than fixing control temperature, the instruction of opening to the energising of well heater 50 is sent to switching part 54 by control part 6.So, control part 6 repeats the energising of On/Off to well heater 50 to maintain fixing control temperature by switching part 54.In addition, control part 6 also can according to the difference of the temperature of fixing control temperature and current warm-up mill 51, and dutycycle when subtend well heater 50 is energized increases and decreases, with the output of control heater 50.
In addition, be provided with power supply unit 9, described power supply unit 9 uses power lead to be connected with the socket of outside (civil power), the various voltages needed for the action of synthetic image forming apparatus.As shown in phantom in Figure 3, in power supply unit 9, input has the electric power coming from civil power.Power supply unit 9 is connected with the switching part 54 of fixing device 5.In addition, then when switching part 54 is opening, civil power is connected to the well heater 50 of fixing device 5 via power supply unit 9.Accordingly, well heater 50 is powered.In addition, power supply unit 9 generates the voltage (describing in detail) of control part 6 and motor driving below.
In addition, the fixing side be provided with in fixing device 5 driving of fixing motor 64 is transmitted drives transfer part 102.Fixing side drives transfer part 102 to comprise the gear train 1022 that multiple gear 1021 combines (engagement).Conveniently, 1 gear 1021 is only illustrated in figure 3.Gear 1021 uses resin gears.And any one gear 1021 in gear train 1022 is connected with backer roll 52 (also can be warm-up mill 51).In addition, fixing device 5 drives any one gear 1021 in the gear train 1022 of transfer part 102 to install with the mode that main body side drives any one gear 1011 in transfer part 101 to be meshed with fixing side.Accordingly, by making fixing motor 64 rotate, and drive transfer part 102 to carry out transmission of drive force via main body side driving transfer part 101, fixing side, thus backer roll 52 is rotated.In addition, the warm-up mill 51 crimped with backer roll 52 also rotates along with the rotation of backer roll 52.So, the driving transfer part 10 by fixing motor 64, warm-up mill 51 and backer roll 52 being rotated is that fixing side drives transfer part 102 and main body side to drive transfer part 101 to combine.
And, in fixing device 5, whether rotating to detect fixing motor 64 and detecting rotational speed, being provided with the scrambler 66 as rotating detection bodies.Scrambler 66 is provided to fixing motor 64.Or scrambler 66 also can be arranged relative to warm-up mill 51 and backer roll 52.Scrambler 66 is installed on the driving shaft of fixing motor 64, comprises the swivel plate being provided with multiple opening and the transmissive optical sensors clipping swivel plate.Opening is arranged with certain angle.When scrambler 66 detects opening and when not detecting opening, its output can change.For this reason, the exporting change cycle of scrambler 66 is different according to the rotational speed of swivel plate (fixing motor 64).
The output of scrambler 66 is imported into control part 6.Whether whether control part 6 changes according to the output of scrambler 66, can identify fixing motor 64, warm-up mill 51 and backer roll 52 and rotate.In addition, control part 6, according to the exporting change cycle of scrambler 66 and frequency, by measuring cycle and frequency by CPU61, thus can identify the rotational speed of fixing motor 64.In addition, because gear ratio etc. is determined, therefore control part 6 is according to the rotational speed of fixing motor 64, can obtain the rotational speed (peripheral speed) of warm-up mill 51 and backer roll 52.
(detailed content of power supply unit 9)
Then, Fig. 4 is used to be described the power supply in the printer 100 involved by embodiment.Fig. 4 illustrates the structure of power supply unit 9 and the block diagram of power supply relation.
First, the structure of power supply unit 9 is described.Power supply unit 9 is connected with civil power (socket) by power lead etc.Accordingly, the electric power coming from civil power is imported into power supply unit 9.In other words, electric power is supplied from civil power to printer 100.In addition, power supply unit 9 comprises primary power source portion 91.
Primary power source portion 91 is the power transformation circuits as transducer, and having the AC rectification supplied from civil power is the rectification circuit and smoothing circuit etc. of direct current.Primary power source portion 91 comprises the full-wave rectifying circuit with diode bridge, level and smooth coil and capacitor etc.
Primary power source portion 91 exports the DC voltage (DC24V) of fixing motor 64 and the motor M 2 except fixing motor 64.The motor M 2 be arranged in printer 100 has: the motor that the various rotary bodies of such as photosensitive drums 41 making image forming part 4 and so on rotate, sheet conveying motor and the motor etc. that paper feed roller 22 is rotated.In addition, conveniently, a motor M 2 except fixing motor 64 is only illustrated in the diagram.
In addition, primary power source portion 91 by direct voltage output to control part 6.Due to for the circuit comprised in the control part 6 including CPU61 etc. and the various memory storage of element and storage part 8 and the circuit of Department of Communication Force 63, DC24V is larger, therefore in control part 6, be provided with the power converter portion 67 as power transformation circuit, described power converter portion 67 generates the voltage needed for driving of control part 6.In addition, can also arrange secondary power supply portion 92 to perform to the power supply of control part 6 outside control part 6, described secondary power supply portion 92 accepts the output in primary power source portion 91 and generates the voltage of control part 6.
So secondary power supply portion 92 is set up as required (exemplifying two in the diagram), described secondary power supply portion 92, according to the output in primary power source portion 91, generates the voltage needed for action of each several part that printer 100 comprises.Secondary power supply portion 92 is dcdc converter and regulator.The secondary power supply portion 92 of the secondary power supply portion 92 that the driving voltage (DC5V) of generating run panel 1 and Department of Communication Force 63 can be set and the driving voltage (DC3.3V) generating storage part 8.In addition, also according to the kind of required voltage, plural secondary power supply portion 92 can be set.
And as shown in Figure 4, control part 6 is connected with each secondary power supply portion 92, and controls the action in each secondary power supply portion 92.Control part 6, when power switch 7 is pressed, can makes the driving in the secondary power supply portion 92 of the driving voltage of generating run panel 1 and storage part 8 stop, and cut off the power supply of printer 100.
(power-off undertaken by power switch 7)
Then, use Fig. 4, Fig. 5, the treatment scheme during power-off undertaken by power switch 7 in the printer 100 of present embodiment is described.Fig. 5 illustrates the process flow diagram based on the treatment scheme when operation of power switch 7 being cut off to the power supply of printer 100.
First, as shown in Figure 2 and Figure 4, as mentioned above, in stamp 100, power switch 7 is provided with.And control part 6 is connected with power switch 7.So, represent that the signal that power switch 7 has been pressed is imported into control part 6.By coming from the signal of power switch 7, control part 6 identifies the power supply in order to cut off printer 100 and there occurs the operation of user to power switch 7.In other words, control part 6 identifies and has made by power switch 7 instruction should cutting off the power supply of image processing system.
And, in the printer 100 of present embodiment, when the power supply of printer 100 is in connection, if press power switch 7, storage part 8 is then made to store for representing the data (record data) that the power supply being made printer 100 by the operation of power switch 7 is cut off in nonvolatile manner, stop the power supply to each portion afterwards, and cut off the power supply of printer 100.In other words, in order to make storage part 8 stored record data, even if power switch 7 is pressed, the power supply in printer 100 also can not be cut off immediately.
Below, use Fig. 5, treatment scheme when being pressed to power switch 7 is described.Fig. 5 start be in connection at the power supply of printer 100 state under the time point that is pressed of power switch 7.
When power switch 7 is pressed, represent that the signal that power switch 7 has been pressed is imported into control part 6 (step #1).Control part 6 accepts this signal, and storage part 8 is stored for representing the record data (step #2) that the power supply making printer 100 by pressing power switch 7 is cut off.So, as long as do not cut off suddenly to the power supply of printer 100, record data will be stored in storage part 8.
In addition, when power switch 7 is pressed under the state that heats by well heater 50 at print procedure moderate heat roller 51, control part 6 can be handled as follows: after print job terminates, stop powering (cutting off energising) to well heater 50, remove warm-up mill 51 by well heater 50 by the state heated.Or, control part 6 also can be handled as follows: after the power supply (energising) to well heater 50 is stopped, make fixing motor 64 continue to rotate, according to the output of temperature sensor 55, the temperature of warm-up mill 51 is reduced to can not occur the temperature preset of welding.So, when power switch 7 is pressed, control part 6 can positively cut off by the energising to well heater 50 of power supply unit 9 and switching part 54, can also perform the welding that the temperature of warm-up mill 51 is reduced and prevent from processing (step #3).In addition, when the temperature of warm-up mill 51 is below fixing control temperature, prevent process without the need to performing welding.
At the end of the storage of the record data in storage part 8, control part 6 controls power supply unit 9 to perform the process (dump process) (step #4) of the power supply cutting off printer 100.Such as, control part 6 makes the secondary power supply portion 92 powered to storage part 8 stop.Afterwards, control part 6 makes the secondary power supply portion 92 of the energize portions except storage part 8 to guidance panel and so on stop.And switching part 54 is remained on closed condition (keeping the state energising to well heater cut off) by control part 6.In addition, even if power switch 7 is pressed, primary power source portion 91 also can not be stopped but still remain the state of driving (action).In other words, if printer 100 and civil power are connected to by power lead, primary power source portion 91 just carries out action.For this reason, when primary power source portion 91 is also stopped completely, power lead is pulled out from socket.
So, be connected by power lead with printer 100 at civil power, and primary power source portion 91 carry out action state under, control part 6 is powered, control part 6 (CPU61 etc.) stops a part of unwanted function to realize low-power consumption, continues to maintain its function simultaneously.So, along with power switch 7 is pressed, in printer 100, power supply is cut off (end).
(process when power supply of printer 100 is connected)
Next, when using the power supply of Fig. 6 to the printer 100 involved by present embodiment to be switched on, the treatment scheme of (when primary power is connected) is described.Fig. 6 is the process flow diagram of the flow process of thermal pretreatment in the fixing device 5 when illustrating that the power supply of printer 100 is switched on.
Under the state that the power supply of printer 100 is in disconnection, printer 100 (cannot print) cannot be used.In order to form the state using printer 100, the power supply of printer 100 must be opened, power to each portion in printer 100, each portion started and carries out preheating, thus form the state that can utilize printer 100.
In order to open the power supply of printer 100, press power switch 7.In addition, even if under the state making the power supply of printer 100 be in disconnection by power switch 7, as long as do not pull out power lead, then primary power source portion 91 and control part 6 (CPU61) just carry out action.So, press power switch 7, represent that the signal that power switch 7 has been pressed is imported into control part 6.Input according to this signal, control part 6 makes the voltage coming from each secondary power supply portion 92 start to export.Accordingly, each portions such as the storage part 8 of electric power in printer 100, control part 6 and storage part 8 start completely, and start preheating.
In addition, can also be provided separately with power switch 7 in printer 100 and connect universal switch 70 for what switch on power, if described in connect universal switch 70 and be pressed; be connected civil power with primary power source portion 91 (with reference to figure 4).Now, connect universal switch 70 if pressed, primary power source portion 91 starts to drive (formation voltage), and control part 6 starts to carry out action, presses power switch 7 afterwards, then can the power supply of enable printer 100 as described above, and starts preheating.In other words, when setting connects universal switch 70, become the step pressing power switch 7 after unlatching connects universal switch 70.
By the startup of storage part 8 grade, control part 6 reads preheating program from storage part 8, and starts to perform thermal pretreatment, and described thermal pretreatment is for the formation of the state that can utilize printer 100.In thermal pretreatment, the well heater 50 of control part 6 pairs of fixing devices 5 is energized, and makes the temperature of warm-up mill 51 rise to fixing control temperature, performs for the formation of can the control of this state of fixing toner images.
At this, there is welding in situation when being cut off according to the power supply of the printer 100 of last time sometimes, namely backer roll 52 a part fusing and fusing part be attached to warm-up mill 51.If because of when pulling out power lead by mistake, occur in power failure or power supply unit 9 abnormal etc. and cause to printer 100 power supply suddenly cut-off thus power supply disconnect, then likely there is welding.
When the power supply to printer 100 is cut-off suddenly, warm-up mill 51 and backer roll 52 stop the rotation.The state heated by well heater 50 pairs of warm-up mills 51 is the state that well heater 50 and warm-up mill 51 have larger heat.In this condition when the rotation of warm-up mill 51 grade stops, only provide heat to the part connected with warm-up mill 51 backer roll 52 from warm-up mill 51.When the part that the heat coming from warm-up mill 51 only concentrates in backer roll 52 is conducted, the part connected with warm-up mill 51 in the side face of backer roll 52 sometimes can melt thus welding occurs.If generation welding, then warm-up mill 51 and backer roll 52 just cannot rotate.
In addition, when welding occurs, if make fixing motor 64 start to rotate as during usual preheating, then larger power (torque) can be applied on each gear driving transfer part 10 to comprise.So, there is the damage of jumping the gears such as tooth sometimes.In addition, if though there is welding will remain on opening by fixing motor 64, then fixing motor 64 can continue to flow through larger current.So, fixing motor 64 easily breaks down.Therefore, in the printer of present embodiment, when likely there is welding, control part 6 when preheating to make fixing motor 64 start to rotate than usually less torque.
Below, use Fig. 6, the flow process of the thermal pretreatment in the fixing device 5 when connecting power supply is described.
First, starting of Fig. 6 is that under the state that is electrically connected with city by power lead at printer, power switch 7 is pressed, the time point that the power supply of printer 100 is switched on.By switching on power, start to generate various voltage at power supply unit 9, storage part 8 etc. starts to be powered, and control part 6 and storage part 8 etc. start (performs start treatment.Step #21).
Secondly, control part 6 confirms whether the dump in last printer 100 is performed by power switch 7.In other words, whether store record data in control part 6 pairs of storage parts 8 to confirm (step #22).
If store record data ("Yes" in step #22) in storage part 8, then there is not welding, even if produce larger torque in fixing motor 64, drive the damage in transfer part 10 can not occur yet.Therefore, control part 6 pairs of well heaters 50 are energized, and make fixing motor 64 start to rotate (step #23) with the first torque (detent torque time usual).In other words, control part 6 applies to make fixing motor 64 start the electric power rotated with the first torque to fixing motor 64.Afterwards, control part 6 makes fixing motor 64 rotate, and becomes common rotational speed (step #24) to make the rotational speed of warm-up mill 51.So, if store record data in storage part 8, then control part 6 makes fixing motor 64 rotate and carry out preheating as usual.
Specifically, if there are record data, then when fixing motor 64 starts to rotate, voltage (output voltage values in the maximum voltage that can apply, primary power source portion 91) when control part 6 applies usual preheating to fixing motor 64, makes fixing motor 64 start to rotate (step #23) with the torque capacity that can export i.e. the first torque.Afterwards, the output of control part 6 pairs of scramblers 66 confirms, and fixing motor 64 is rotated with the speed preset.In other words, control part 6 adjusts the size to the voltage that fixing motor 64 applies, or adjustment dutycycle, controls the rotational speed of fixing motor 64, to make the common rotational speed of the rotational speed of fixing motor 64 for specification presets.Accordingly, the peripheral speed of warm-up mill 51 and backer roll 52 also becomes the speed preset.
On the other hand, if do not store record data ("No" in step #22) in storage part 8, then likely there occurs welding, if produce larger torque (the first torque) in fixing motor 64, then likely make the gear failure in driving transfer part 10.
Therefore, control part 6 keeps not to the state that well heater 50 is energized, and makes fixing motor 64 start to rotate (step #25) with welding detection detent torque i.e. the second torque being less than the first torque.In other words, control part 6 applies to make fixing motor 64 start the electric power rotated with the second torque to fixing motor 64.Specifically, if do not record data, then the voltage being applied to fixing motor 64 is set to the voltage less than voltage when voltage during common first torque generation and preheating by control part 6, and makes fixing motor 64 start to rotate.Or the dutycycle of control part 6 to the constant voltage putting on fixing motor 64 adjusts, compared with when occurring with the first torque, reduce the electric power putting into fixing motor 64, and make fixing motor 64 start to rotate with the second torque.
Specifically, if do not record data, then control part 6 produces and each roller can be made to start the minimal torque (the second torque) rotated in fixing motor 64.Accordingly, even if there occurs welding, also can prevent from driving the gear failure in transfer part 10.
In addition, can measure being applied to the size of the voltage of fixing motor 64 or dutycycle etc. when producing minimal torque in advance, what storage part 8 is prestored produce minimal torque executes alive condition to fixing motor 64.Control part 6 confirms the output of scrambler 66, and increases the voltage being applied to fixing motor 64 step by step, or increases dutycycle, makes storage part 8 store fixing motor 64 and starts the voltage applying condition of rotation using the condition as generation second torque.If do not record data, then control part 6 is according to the condition of generation second torque stored in storage part 8, is applied for making fixing motor 64 start the electric power rotated to fixing motor 64.
Then, control part 6, according to the output of scrambler 66, confirms whether fixing motor 64 rotates (step #26).If rotated ("No" in step #26) not yet through the fixing motor 64 of certain hour, then control part 6 is identified as and there occurs welding (step #27) in fixing device 5.
In addition, although there occurs welding but still proceed the driving of fixing motor 64, it is not preferred for continuing to apply torque (load) to driving transfer part 10.Therefore, if can detect that fixing motor 64 does not rotate, then control part 6 stops applying electric power (step #28) to fixing motor 64.In addition, if there occurs welding in fixing device 5, then cannot print, need to change fixing device 5.Therefore, control part 6 makes the liquid crystal display part 12 of guidance panel 1 show, and reports that (step #29) occurs the exception caused because of welding.Then, process ends.After this, the repairing of the replacing unit of fixing device 5 is carried out by maintenance personal etc.
On the other hand, rotate at fixing motor 64, even without the fixing motor 64 of record data also just when rotated ("Yes" in step #26), flow process transfers to step #23.So, rotate if control part 6 is detected as fixing motor 64, then make fixing motor 64 rotate with the first torque, and start the preheating that performs as usual.
By step #24, if control part 6 can make fixing motor 64 rotate to make the rotational speed of warm-up mill 51 become common rotational speed, then can confirm welding does not occur.Therefore, control part 6 deletion record data (eliminating, step #30) from storage part 8.Accordingly, when making storage part 8 start by switching on power, by confirming there are no record data in storage part 8, can confirm whether the cut-out of the power supply in the last printer 100 is be performed by power switch 7.
Then, control part 6 monitors the output of temperature sensor 55, confirms whether the temperature of warm-up mill 51 reaches fixing control temperature (step #31).If do not reach fixing control temperature ("No" in step #31), then control part 6 makes to proceed (step #32) to the energising of well heater 50 and the rotation of fixing motor 64, and again confirms (returning step #31) reaching fixing control temperature.
On the other hand, if reach fixing control temperature ("Yes" in step #31), then control part 6 stops being energized (step #33) to well heater 50, after certain hour, fixing motor 63 is stopped (step #34).Then, this flow process terminates, and control part 6 transfers to the control of fixing control temperature maintaining warm-up mill 51, until transfer to battery saving mode etc. and no longer need to maintain fixing control temperature (end).
If cut off suddenly to the power supply of image processing system (printer 100), then the power supply to storage part 8 also can be stopped suddenly.Therefore, storage part 8 keeps the state that cannot store for representing the record data that the power supply of image processing system is cut off and stops action.On the other hand, if cut off suddenly to the power supply of image processing system, then performing the energising to well heater 50 with under the state making the temperature of heating rotating body (warm-up mill 51) and raise, the rotation of heating rotating body (warm-up mill 51) etc. is likely stopped suddenly, thus likely welding occurs.
Therefore, the image processing system (printer 100) involved by present embodiment comprises power supply unit 9, fixing device 5, power switch 7, storage part 8, fixing motor 64 and drives transfer part 10.Power supply unit 9 is connected with external power source (civil power), generates and supplies the voltage needed for action of image processing system.The well heater 50 that fixing device 5 comprises heating rotating body (warm-up mill 51), heated heating rotating body by energising and have elastic layer and be crimped on heating rotating body and form the pressurization rotary body (backer roll 52) in gap, makes paper transferred with toner image in gap by fixing to carry out.Power switch 7 is switches of the power supply for cutting off image processing system.Storage part 8 stored record data, described record data representation makes the power supply of image processing system be cut off by the operation of power switch 7.Fixing motor 64 is when storage part 8 starts because image processing system switches on power, about the dump of the image processing system of last time, if storage part 8 stores record data, then fixing motor 64 is applied in and makes fixing motor 64 start the electric power rotated with the first torque, if the non-stored record data of storage part 8, then fixing motor 64 is applied in and makes fixing motor 64 start the electric power rotated with the second torque being less than the first torque, rotates to make heating rotating body and pressurization rotary body.Drive transfer part 10 to comprise multiple gear (gear 1011, gear 1021), the driving force of fixing motor 64 is passed to the either or both in pressurization rotary body and heating rotating body, rotate to make heating rotating body and pressurization rotary body.
When there occurs welding, fixing motor 64 cannot be made to rotate.Therefore, in the image processing system (printer 100) of present embodiment, when likely there occurs welding, the mode becoming the torque (the second torque) after forcing down than common torque (the first torque) with the torque of fixing motor 64 applies electric power to fixing motor 64.Therefore, even if there occurs welding, also can suppress to be applied to drive transfer part 10 to comprise gear (gear 1011, gear 1021) on power, thus the damage of the gear driving transfer part 10 to comprise can be prevented.In addition, because fixing motor 64 and usual phase ratio have forced down torque, even if therefore there occurs welding, also can avoid continuing to flow through larger current in fixing motor 64, thus the fault of fixing motor 64 can be prevented.So, can avoid producing cascading failure because there is welding.
In addition, image processing system (printer 100) comprises the rotation detection bodies (scrambler 66) whether rotated for detecting fixing motor 64, when detecting that fixing motor 64 does not rotate with the state of the second torque, stop applying electric power to fixing motor 64, when detecting that fixing motor 64 rotates with the state of the second torque, rotational speed is brought up to the common rotational speed preset by fixing motor 64.Accordingly, do not rotate according to fixing motor 64, generation welding can be detected.In addition, when generation welding being detected, fixing motor 64 can be made to stop, thus can avoid continuing applying power to the gear (gear 1011, gear 1021) driving transfer part 10 to comprise.
In addition, image processing system (printer 100) comprises control part 6, described control part 6 is connected with power switch 7, be identified by the instruction should cutting off the power supply of image processing system that power switch 7 is made, and control the action of power supply unit 9, power supply unit 9 comprises primary power source portion 91 and secondary power supply portion 92, described secondary power supply portion 92 accepts the voltage of primary power source portion 91 generation and generates other voltage, storage part 8 accept from secondary power supply portion 92 power supply go forward side by side action do, control part 6 identify make the instruction of the power supply that should cut off image processing system by power switch 7 time, make storage part 8 stored record data, after making storage part 8 store, the action in the secondary power supply portion 92 powered to storage part 8 is stopped.Accordingly, when using power switch 7 to perform the power-off of image processing system, can after making storage part 8 positively store record data, stop the power supply to storage part 8 grade, described record data representation is performed to the operation cutting through power switch 7 of the power supply of image processing system.
In addition, the minimum torque that fixing motor 64 can make the heating rotating body of non-welding (warm-up mill 51) and pressurization rotary body (backer roll 52) rotate rotates as the second torque.Accordingly, when likely there occurs welding, be that the mode of required minimal torque applies electric power to fixing motor 64 to make the torque of fixing motor 64.Therefore, even if there occurs welding, also can suppress the torque of fixing motor 64, can not become to make torque and drive the upper size producing that degree of jumping tooth of the gear (gear 1011, gear 1021) of transfer part 10.
In addition, image processing system (printer 100) comprises reporting unit (guidance panel 1), described reporting unit, when detecting that fixing motor 64 does not rotate with the state of the second torque and stops applying electric power to fixing motor 64 by rotation detection bodies (scrambler 66), is reported in fixing device 5 and occurs extremely.Accordingly, the exception of the fixing device 5 that can cause to user's report because of welding etc. and the necessity of replacing fixing device 5.
In addition, fixing device 5 is unitized, transfer part 10 is driven to drive transfer part 101 and fixing side to drive transfer part 102 to form by main body side, described main body side drives transfer part 101 to be connected with fixing motor 64, be arranged on the main body of image processing system (printer 100), and comprise gear (gear 1011), described fixing side drives transfer part 102 to be arranged at fixing device 5, and the gear (gear 1021) comprised for making pressurization rotary body (backer roll 52) and heating rotating body (warm-up mill 51) rotate, fixing device 5 is installed in image processing system, the gear of transfer part 101 and fixing side is driven to drive the gear of transfer part 102 to be meshed to make main body side, thus by the driving force of fixing motor 64, pressurization rotary body and heating rotating body are rotated.Accordingly, even if there is welding in fixing device 5, just can complete repairs as long as change fixing device 5.In addition, owing to being positioned at the inside of image processing system, the damage such as driving the jumping tooth of the gear of transfer part 101 and so on than the main body side of the more difficult repairing of fixing device 5 or replacing can also therefore be prevented.Therefore, it is possible to avoid producing cascading failure because there is welding, thus repairing can be prevented complicated.
In addition, after fixing motor 64 starts to rotate according to the first torque or the second torque, when the rotational speed of fixing motor 64 becomes the usual rotational speed preset, storage part 8 eliminates record data.Accordingly, whenever clearly going out welding does not occur, record data are eliminated.Therefore, the dump of the image processing system (printer 100) of the record data representation last time stored in storage part is performed by power switch 7.In addition, record data can not be accumulated, thus can suppress the capacity required for storage recording data.
When power switch 7 is pressed, power supply unit 9 cuts off the energising to well heater 50, and fixing motor 64 makes heating rotating body (warm-up mill 51) rotate to make temperature reduce, thus execution welding prevents process.Accordingly, even if when power switch 7 is pressed and in image processing system (printer 100), power supply is cut off, prevent the process of welding to be still performed.Therefore, welding is difficult to occur more.
In addition, the present invention can also grasp as the invention of method.
Above embodiments of the present invention are illustrated, but scope of the present invention is not limited thereto, in the scope not departing from invention aim, various change can be applied implement.
Claims (8)
1. an image processing system, comprising:
Power supply unit, is connected with external power source, generates and supplies the voltage needed for action of image processing system;
Fixing device, the well heater comprise heating rotating body, being heated by energising to described heating rotating body and have elastic layer and be crimped on described heating rotating body and form the pressurization rotary body in gap, makes paper transferred with toner image in described gap by fixing to carry out;
Power switch, for cutting off the power supply of image processing system; And
Drive transfer part, comprise multiple gear, the driving force of fixing motor is passed to the either or both in described pressurization rotary body and described heating rotating body, to make described pressurization rotary body and described heating rotating body rotate,
Described image processing system comprises further:
Storage part, stored record data, described record data representation makes the power supply of image processing system be cut off by the operation of described power switch; And
Fixing motor, for when described storage part starts because image processing system switches on power, about the dump of the image processing system of last time, if described storage part stores described record data, then described fixing motor is applied in and makes described fixing motor start the electric power rotated with the first torque, described first torque is the torque capacity that can export, if described storage part does not store described record data, then described fixing motor is applied in and makes described fixing motor start the electric power rotated with the second torque being less than described first torque, rotate to make described heating rotating body and described pressurization rotary body,
The minimum torque that described fixing motor can make the described heating rotating body of non-welding and described pressurization rotary body rotate rotates as described second torque.
2. image processing system according to claim 1, comprises further:
Rotating detection bodies, whether rotating for detecting described fixing motor,
Under being applied at described fixing motor the state making described fixing motor start with the second torque the electric power rotated,
When detecting that described fixing motor does not rotate, stop applying electric power to described fixing motor, when described fixing motor being detected just when rotated, rotational speed is increased to the usual rotational speed preset by described fixing motor.
3. image processing system according to claim 1, comprises further:
Control part, is connected with described power switch, is identified by the instruction should cutting off the power supply of image processing system that described power switch is made, and controls the action of described power supply unit,
Described power supply unit comprises primary power source portion and secondary power supply portion, and described secondary power supply portion accepts voltage that described primary power source portion generates and generates other voltage,
Described storage part accepts power supply to perform an action from described secondary power supply portion,
Described control part identify make the instruction of the power supply that should cut off image processing system by described power switch time, described storage part is made to store described record data, after making described storage part store, the action in the described secondary power supply portion powered to described storage part is stopped.
4. image processing system according to claim 2, comprises further:
Reporting unit, under to be applied in the state making described fixing motor start the electric power rotated with the second torque at described fixing motor by described rotation detection bodies, detect that described fixing motor does not rotate, and when stopping applying electric power to described fixing motor, be reported in described fixing device and occur extremely.
5. image processing system according to claim 1,
Described fixing device is unitized,
Described driving transfer part drives transfer part and fixing side to drive transfer part to form by main body side, described main body side drives transfer part to be connected with described fixing motor, be arranged at the main body of image processing system, and comprise gear, described fixing side drives transfer part to be arranged at described fixing device, and the gear comprised for making described pressurization rotary body and described heating rotating body rotate, described fixing device is installed in image processing system, the gear of transfer part and described fixing side is driven to drive the gear of transfer part to be meshed to make described main body side, thus by the driving force of described fixing motor, described pressurization rotary body and described heating rotating body are rotated.
6. image processing system according to claim 1,
After described fixing motor starts to rotate according to described first torque or described second torque, when the rotational speed of fixing motor becomes the usual rotational speed preset,
Described storage part eliminates described record data.
7. image processing system according to claim 1,
When described power switch is pressed,
Described power supply unit performs and the welding that the energising to described well heater is cut off is prevented process, and described fixing motor performs and makes the rotation of described heating rotating body prevent process with the welding making temperature reduce.
8. a control method for image processing system, comprises the steps:
Make the voltage needed for action of power supply unit synthetic image forming apparatus,
To well heater energising to heat heating rotating body,
The pressurization rotary body with elastic layer is crimped on described heating rotating body and forms gap,
The paper transferred with toner image is made to pass through fixing to carry out in described gap,
The dump of image processing system is accepted by power switch,
By driving transfer part, the driving force of fixing motor is passed to the either or both in described pressurization rotary body and described heating rotating body, to make described pressurization rotary body and described heating rotating body rotate,
The control method of described image processing system comprises the steps: further
Make storage part stored record data, described record data representation makes the power supply of image processing system be cut off by the operation of described power switch,
When described storage part starts because image processing system switches on power, about the dump of the image processing system of last time, if described storage part stores described record data, then apply to make described fixing motor start the electric power rotated with the first torque to described fixing motor, described first torque is the torque capacity that can export
If described storage part does not store described record data, then apply to make described fixing motor start the electric power rotated with the second torque being less than described first torque to described fixing motor,
By described fixing motor, described heating rotating body and described pressurization rotary body are rotated,
The minimum torque that described fixing motor can make the described heating rotating body of non-welding and described pressurization rotary body rotate rotates as described second torque.
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| JP2012-015201 | 2012-01-27 | ||
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| JP6394821B2 (en) * | 2015-12-11 | 2018-09-26 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
| US10394167B2 (en) * | 2016-09-16 | 2019-08-27 | Fuji Xerox Co., Ltd. | Image forming apparatus |
| US11003112B2 (en) * | 2019-01-23 | 2021-05-11 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus |
| JP2021026186A (en) * | 2019-08-08 | 2021-02-22 | 株式会社リコー | Fixing device and image forming apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07261597A (en) * | 1994-03-25 | 1995-10-13 | Nec Corp | Fixing unit |
| CN1550930A (en) * | 2003-05-15 | 2004-12-01 | 佳能株式会社 | Fixing apparatus |
| CN102200742A (en) * | 2010-03-25 | 2011-09-28 | 夏普株式会社 | Image forming apparatus |
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| JP5282311B2 (en) * | 2010-05-27 | 2013-09-04 | コニカミノルタ株式会社 | Fixing apparatus and image forming apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07261597A (en) * | 1994-03-25 | 1995-10-13 | Nec Corp | Fixing unit |
| CN1550930A (en) * | 2003-05-15 | 2004-12-01 | 佳能株式会社 | Fixing apparatus |
| CN102200742A (en) * | 2010-03-25 | 2011-09-28 | 夏普株式会社 | Image forming apparatus |
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