CN108227441A - Imaging device - Google Patents

Imaging device Download PDF

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Publication number
CN108227441A
CN108227441A CN201711323800.7A CN201711323800A CN108227441A CN 108227441 A CN108227441 A CN 108227441A CN 201711323800 A CN201711323800 A CN 201711323800A CN 108227441 A CN108227441 A CN 108227441A
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CN
China
Prior art keywords
period
rotation
roller
unit
stepper motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711323800.7A
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Chinese (zh)
Inventor
青木孝平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of CN108227441A publication Critical patent/CN108227441A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display

Abstract

The present invention provides a kind of imaging device, including：Band rotating member, forms together with rotating member for by the retained part in toner image to recording medium；It is pivotably supported the first roller and the second roller with rotating member；Make the inclined stepper motor of the first roller；The unit of the rotation amount signal of the rotation amount of rotor in output instruction stepper motor；The current control unit of the electric current of the coil in stepper motor is supplied to according to the control of rotation amount signal；And notification unit.The output of the detection unit of position of the notification unit based on the first roller of detection and the value counted to the measuring unit counted as the rotation amount indicated by output unit provide confirmation of the reservation in the state of imaging is able to carry out.

Description

Imaging device
Technical field
The present invention relates to a kind of electrophotographic image formings.
Background technology
Electrophotographic image forming includes fixing device, which is configured to heat and pressure being applied to record Unfixed toner image on medium is with will be in toner image to recording medium.Known fixing device can have A pair of of rotating member of retained part is formed, one or two in the rotating member can be endless belt.
Japanese Unexamined Patent Publication 2015-59964 bulletins disclose one turn in the multiple rollers of tectonic forcing in stepper motor To one end (band sets across the multiple roller and tilted) of roller, so that transverse reciprocating moves band in a certain range.It is Japanese special It opens 2015-59964 bulletins and further discloses such construction：For make with move back and forth control failure and band End position in the horizontal be more than a certain range in the case of, imaging device is determined to break down and be stopped in fixing device The rotary motion of band.
It causes to may be for driving the same of the stepper motor of slewing rollers with the reason of control failure moved back and forth The missing of step.
However, in the construction according to Japanese Unexamined Patent Publication the 2015-59964th, imaging device is for moving back and forth band Control failure after determine to break down.As a result, user may be unaware that the generation of failure moves back and forth band with being used for Control it is related, until band rotation stop until.This may give identification failure to bring inconvenience or postpone.
Invention content
Therefore, the present invention provides a kind of for improving the equipment of the notice about failure.
A kind of imaging device, including：Imaging unit is configured to form toner image on the recording medium；Rotation Component；Endless belt rotating member is configured to cooperate with forming retained part with rotating member, the retained part be configured to by by In the toner image to the recording medium that the imaging unit is formed；First roller and the second roller, being configured to can Pivotally support the band rotating member；Stepper motor；Transfer unit is driven, is configured to transmit the driving of stepper motor To the first roller so as to tilt first roller；Output unit, the rotor being configured in the output instruction stepper motor Rotation amount rotation amount signal；Current control unit is configured to based on the rotation amount letter exported from the output unit Number control the electric current for the coil that be supplied in the stepper motor；Measuring unit is configured to single by the output The rotation amount of member instruction is counted；Detection unit is configured to detect the position of first roller；And notification unit, It is configured to the count value of output and measuring unit based on detection unit and provides confirmation of the reservation, and the notification unit is can The confirmation of the reservation is provided in the state of execution imaging.
A kind of imaging device, including：Imaging unit is configured to form toner image on the recording medium；Rotation Component；Endless belt rotating member is configured to cooperate with forming retained part with rotating member, the retained part be configured to by by In the toner image to the recording medium that the imaging unit is formed；First roller and the second roller, being configured to can Pivotally support the band rotating member；Stepper motor；Transfer unit is driven, is configured to transmit the driving of stepper motor To the first roller so as to tilt first roller；Detection unit is configured to detect the position of first roller；And output Unit is configured to export the rotation amount signal for the rotation amount for indicating the rotor in the stepper motor and indicates rotor The direction of rotation signal of direction of rotation.In this case, output unit output rotation amount signal and direction of rotation signal so that The first period, the second period, third period and the 4th period can be sequentially repeated.In the first period, rotor is from the first roller position State in precalculated position rotates scheduled rotation amount along the first direction of rotation.In the second period, rotor is from the first period One roller is rotated by the driving of stepper motor and the position of movement along the second direction of rotation opposite with the first direction of rotation, until Detection unit detects that the first roller is located at the precalculated position.In the third period, rotor is further rotated along the second direction of rotation. In the 4th period, rotor is rotated in a first direction, until the first roller is located at precalculated position.Imaging device further includes：Current control Unit is configured to the rotation amount signal exported based on output unit and direction of rotation signal to control stepping horse to be supplied to The electric current of coil in reaching；Measuring unit is configured to measure within second period from output unit instruction edge At the time of detecting that first roller is located at the precalculated position to the detection unit at the time of second direction rotation it Between period；And notification unit, it is configured to provide confirmation of the reservation, the notice based on the period measured by measuring unit Unit provides the confirmation of the reservation in the state of imaging is able to carry out.
From with reference to attached drawing in being described below of exemplary embodiment, other features of the invention will become obvious.
Description of the drawings
Fig. 1 is the flow chart for showing according to embodiments of the present invention to control stepper motor.
Fig. 2 is the flow chart of the control for being related to stepper motor according to embodiments of the present invention.
Fig. 3 is to show according to embodiments of the present invention to determine whether to synchronize the flow chart slightly lacked.
Fig. 4 shows exemplary imaging device according to embodiments of the present invention.
Fig. 5 shows exemplary fixing device according to embodiments of the present invention.
Fig. 6 is the side view for showing exemplary fixing device according to embodiments of the present invention.
Fig. 7 shows the steering operation for being used to control the reciprocating movement of band according to embodiments of the present invention.
Fig. 8 shows example runner position detection unit according to embodiments of the present invention.
Fig. 9 is to show the position of band according to embodiments of the present invention and to carry the example between the signal of position sensor The table of property correspondence.
Figure 10 shows the relationship according to embodiments of the present invention between position and sensor mark.
Figure 11 A and Figure 11 B show the mechanism related with steering operation according to embodiments of the present invention.
Figure 12 A and Figure 12 B show the representative configuration of stepper motor according to embodiments of the present invention.
Figure 13 is the block diagram related with control according to embodiments of the present invention.
Figure 14 shows the variation according to embodiments of the present invention that the angle pulse slightly lacked is synchronized with stepper motor.
Figure 15 is according to embodiments of the present invention synchronous with determining whether generation slightly to lack relevant flow chart.
Figure 16 shows exemplary fixing device according to embodiments of the present invention.
Specific embodiment
Detailed description of the present invention embodiment that hereinafter reference will be made to the drawings.It should be understood that component according to the embodiment is only It provides for purposes of illustration, the present invention is not limited by the component of embodiment.
First embodiment
Imaging device
Fig. 4 illustrates exemplary imaging device.Imaging device 1 has yellow (Y), magenta (M), cyan (C) and black (K) four imaging unit U (UY, UM, UC, UK).In order to avoid complicated description, in the following description, Y, M, C and K's Four imaging units are also such by " U " is marked to represent, and in the description of dependent processing unit.Y, M, C and K color into As putting in order for unit U is without being limited thereto.In each imaging unit U, photosensitive drums (image bearing member) 2 are filled by charging roller 3 Electrostatic.Laser scanner 4 makes photosensitive drums 2 be exposed to laser beam so that electrostatic latent image can be formed in photosensitive drums 2.Here shape Into electrostatic latent image correspond to the image information of CPU (central processing unit) 10 inputted from external host device 23.It is formed in sense Electrostatic latent image on light drum 2 uses toner development by developing apparatus 5.The toning formed in photosensitive drums 2 by developing apparatus 5 Agent image is sequentially transferred to by first transfer roll 6 on intermediate transfer belt 8.Therefore, panchromatic toning is formed on intermediate transfer belt 8 Agent image.
On the other hand, box 15 and 16 accommodates sheet material (recording medium) S.Sheet material S in box 15 or 16 passes through supply roller 25, biography Roller 26 and 27 and alignment rolls 18 is sent to be transmitted to by transmitting path 17 by what intermediate transfer belt 8 and secondary transfer roller 14 were formed to be turned Print retained part 102.Intermediate transfer belt 8 is clipped at transfer nip point 102 between roller 13 and secondary transfer roller 14.Centre turns Toner image on print band 8 is transferred secondarily on the sheet material S for being sent to transfer nip point 102.It has been transferred toning The sheet material S of agent image is sent to fixing device 100 by transmitting path 19.Sheet material S is heated and is added in fixing device 100 Pressure.Therefore, the toner image on sheet material S (recording medium) is fixed to sheet material S.The sheet material S being fixed by fixing device 100 leads to It crosses distributing roller 20 and is discharged to external discharge tray 21.
According to this embodiment, imaging device 1 is the example apparatus for having panchromatic intermediate transfer imaging unit.However, this hair Bright embodiment is without being limited thereto.For example, it can be direct transfer apparatus described below, in it will be described below Between transfer belt 8 and toner image from photosensitive drums 2 be transfer will be made directly into sheet material S or can be monochromatic imaging device (such as with In the equipment for forming monochrome toner image).Imaging device 1 can be duplicator, printer, facsimile equipment or including The multifunction peripheral of multiple functions.
Fixing device
In the following, the construction of fixing device 100 is described with reference to Fig. 5 and Fig. 6.Fig. 5 shows exemplary fixing device.Fig. 6 is The front view of exemplary fixing device.Here, in the explanation of the embodiment, term " front side " refers to from driven roller 131 During end on observation fixing device 100, the direction of transfer for making the sheet material S in fixing device 100 is side from right to left.Term " rear side " refer to from the end on observation fixing device 100 of driven roller 131 when, make the direction of transfer of the sheet material S in fixing device 100 For side from left to right.
Heating tape 130 and press belt 120 form fixing nip part (retained part) N, for passing through cooperation clamping and passing Send sheet material S by toner image on sheet material S.
Press belt 120 can be endless belt rotating member (rotating member), and by including pressure roller 121 and jockey pulley 122 two rollers are pivotably supported.Jockey pulley 122 is pushed from spring and applies tension to press belt 120.Therefore, press belt 120 can be set under the tension (such as 200N) of predetermined amount.
Press belt 120 can be made of any heat proof material.For example, press belt 120 can be for example, by being 50 μ in thickness M, width is 380mm, coats the silicon rubber of 300 μ m-thicks on the nickel metal layer of Zhou Changwei 200mm and cover its surface with PFA pipes Layer is formed.
Pressure pad 125 is arranged on the inside of press belt 120, and inside corresponds to by the press belt 120 and heating tape 130 Entrance side (the pressurization on the direction of transfer of sheet material S of the fixing nip part N for being configured to clamp and transmit sheet material S formed The upstream side of roller 121).Pressure pad 125 can for example be made of silicon rubber.Pressure pad 125 is with the power (such as 400N) of predetermined amount It is pressed against on press belt 120, pressure pad 125 and pressure roller 121 form fixing nip part N.
Pressure roller 121 is that press belt 120 hangs a roller on it, and for example can be the outer diameter with φ 20 Hollow stainless steel riders.Pressure roller 121 is arranged on the outlet side of fixing nip part N formed by press belt 120 and heating tape 130 (downstream side of the pressure pad 125 on sheet material S direction of transfers).There can be heater inside pressure roller 121.
Jockey pulley 122 is that press belt 120 hangs a roller on it, and can be hollow stainless steel riders, such as have There are the outer diameter of φ 20 and the internal diameter of φ 18.Jockey pulley 122 is also used as slewing rollers, which is configured to perform to adjust The steering operation of bending of the press belt 120 on laterally (or longitudinal direction of pressure roller 121).Steering behaviour described in detail below Make.
Oiling roller (lubricant application component) 126 is arranged between pressure pad 125 and jockey pulley 122, and be configured to will be oily The inner surface of press belt 120 is applied to as lubricant.The both ends of oiling roller 126 are supported (Fig. 8) by arm 127.Arm 127 is by tension Roller 122 supports, and can be rotated around the axis of jockey pulley 122.Arm 127 is connected to the pressing unit of unshowned such as spring, and And oiling roller 126 is against the inner surface of press belt 120.
Heating tape 130 can be endless belt rotating member (rotating member).Heating tape 130 is by jockey pulley 132 and driven roller 131 the two rollers are pivotably supported, and jockey pulley 132 provides tension to heating tape 130.Jockey pulley 132 by spring push and to Heating tape 130 provides tension.Therefore, heating tape 130 can be set under scheduled tension (such as 200N).
Heating tape 130 can for example, by be 75 μm in thickness, the metal layer (example of width 380mm, Zhou Changwei 200mm Such as nickel metal layer or stainless steel layer) on coat the silicon rubber of 300 μ m-thicks and cover its superficial layer with PFA pipes to be formed.
Heating tape 130 can be contacted with the surface with unfixed toner image of sheet material S.Heating tape 130 can be by IH heaters (induction heating equipment) 135 heat, and can use toner image of the heat on sheet material S.
In the opposite with the entrance side of fixing nip part N formed by heating tape 130 and press belt 120 of heating tape 130 The pad support 137 made of such as stainless steel (or SUS materials) is set on the inside answered.Pad support 137 is with the pressure of predetermined amount (such as 400N) is pressed against on pressure pad 125, and pad support 137 and driven roller 131 form fixing nip part N.
Driven roller 131 can be for example with the plug as the solid stainless steel riders that outer diameter is φ 18 and on the surface of plug There is heat-resistant silicon rubber elastic layer on layer.Driven roller 131 is arranged on the fixing nip formed by heating tape 130 and press belt 120 On the outlet side of part N.The elastic layer of driven roller 131 with pressure roller 121 by contacting with pressure and flexible deformation, so as to driven roller 131 can carry a part of fixing nip part N.
Jockey pulley 132 for example can be the stainless steel hollow roller that about outer diameter is φ 20, internal diameter is φ 18.Jockey pulley 132 Slewing rollers are also used as, which is configured to perform to adjust heating tape 130 laterally (or longitudinal direction of driven roller 131) On bending steering operation.
Driven roller 131 is driven by drive motor 603 (Figure 13) to be rotated.Heating tape 130 is rotated by rotation driven roller 131.Pressure Power band 120 follows heating tape 130 to rotate.Therefore, heating tape 130 and press belt 120 can transmit sheet material S in a stable manner.
With the steering operation and control moved back and forth
In the following, with reference to Fig. 5 to 8 and Figure 11 A and Figure 11 B, describe to make with the steering operation and control moved back and forth. Fig. 7 shows to control with the steering operation moved back and forth.Fig. 8 shows example runner position detection unit.Figure 11 A are shown Control arm 152, worm screw 157 and the stepper motor 155 of the longitudinal direction front side for being arranged on jockey pulley 122 from rear side.Figure 11 B It is the perspective view of control arm 152, worm screw 157 and stepper motor 155.
Below by for move back and forth control, steering operation and synchronizing slightly lacks determining is illustratively described For moving back and forth the control of press belt 120.
Fixing device 100 has sensor list near the lateral front end relative to press belt 120 of fixing device 100 Member 150.Sensor unit 150 is configured to the position of detection press belt 120.Sensor unit 150 is described more fully below.
Sensor unit 150 is configured to the position of the end of detection press belt 120.CPU 10 is based on testing result (output) Make jockey pulley 122 around pressure roller 121 tilt (steering operation) with control pressure band 120 in the horizontal movement (laterally partially Difference).CPU 10 performs control so that past in the presumptive area between one end that press belt 120 can be in the horizontal and the other end Multiple mobile (band moves back and forth control).
In other words, it is upward out pre- in the horizontal stroke of press belt 120 to be configured to detection press belt 120 for sensor unit 150 Determine region.The fact that leave presumptive area in response to the press belt 120 that sensor unit 150 detects, CPU 10 makes jockey pulley 122 may return on the direction of presumptive area in press belt 120 and tilt.With reference to the example in figure 10, which corresponds to In the range of ± 1.5mm.
More specifically, in the case where band moves back and forth control, when detecting the pressure towards one end (such as front end) lateral shift When power band 120 is located at the precalculated position of one end (front side), stepper motor 155 rotates predetermined number of revolutions by driving.Therefore, jockey pulley 122 can laterally be biased to tilt on the direction of the other end (rear side) in press belt 120.When press belt 120 revolves in this state When turning, press belt 120 is laterally biased to another side (rear side).When to the press belt 120 of another side (rear side) lateral shift During positioned at the precalculated position of another side (rear side), stepper motor 155 is driven to rotate scheduled revolution.Therefore, jockey pulley 122 It can be towards tilting on the direction of one end (front side) lateral shift in press belt 120.When press belt 120 rotates in this state When, press belt 120 is towards one end (front side) lateral shift.As repeatedly these operations as a result, press belt 120 is controlled as It is moved back and forth in presumptive area in the horizontal.Here, the position of press belt 120 is detected by sensor unit 150, this will be under Face is described.
Steering operation and motor HP sensors
The mechanism for performing steering operation is described below.Jockey pulley 122 is to make tension by performing steering operation 122 inclined slewing rollers of roller.Support arm 154 (Fig. 6) is the arm for supporting 122 one end of jockey pulley, and is supported for enclose Outer shaft 151 (fulcrum) rotation of side plate 140 in fixing device 100.Axis 151 is the rotary shaft of pressure roller 121, and rotatable Ground is fixed on side plate 140.Jockey pulley 122 has bearing 153, and the bearing 153 is rotatably and can on the tension direction of band It is slidably supported jockey pulley 122.In order to apply tension to press belt 120, support arm 154 keeps extension spring 156, the stretching bullet Spring 156 pushes the bearing 160 in jockey pulley 122 on the tension direction of band.Due to extension spring 156, press belt 120 is applied The tension of 200N.
Jockey pulley 122 also has the support arm 154 fixed to drive shaft 159.Drive shaft 159, which is connected to, to be treated by stepper motor The control arm 152 of 155 drivings.The control arm 152 driven by stepper motor 155 rotates drive shaft 159 with pivotal support arm 154. This can tilt the jockey pulley supported by support arm 154 122.
Control arm 152 has gear unit 152a (Figure 11 A and 11B) and supports the arm unit 152b of drive shaft 159.Gear Unit 152a is engaged with by the worm screw 157 of 155 rotatable driving of stepper motor.Stepper motor 155 is structured to carry out steering behaviour The drive motor of work.
Here, support arm 154, worm screw 157 and control arm 152 (gear unit 152a and arm unit 152b) are as being configured to The driving of stepper motor 155 is transmitted to the driving transfer unit of jockey pulley 122.
Jockey pulley 122, support arm 154, drive shaft 159, worm screw 157, control arm 152 (gear unit 152a and arm unit 152b) and stepper motor 155 be configured for perform steering operation mechanism.CPU 10 controls the rotation of stepper motor 155 So that mechanism operating, control is moved back and forth so as to perform band, the band move back and forth control cause press belt 120 with Vertical horizontal of the direction of transfer of sheet material S moves up.
In the following, control arm 152, worm screw 157 and stepper motor 155 are described for steering operation with reference to Figure 11 A and Figure 11 B Construction.
Worm screw 157 is maintained at rotary shaft (motor drive shaft) 155d (Figure 12 A and 12B) of stepper motor 155, worm screw 157 It is rotated with together with rotary shaft 155d.Worm screw 157 rotates the gear unit 152a to rotate control arm 152.Arm unit 152b and tooth Wheel unit 152a is integrally rotated so that the drive shaft 159 of support arm 154 can rotate.Therefore, jockey pulley 122 can be Steering operation is performed on one direction.
When stepper motor 155 rotates in mutually opposite directions, control arm 152 is rotated in the opposite sense, and jockey pulley 122 is also along phase Negative direction rotates.Therefore, jockey pulley 122 performs steering operation in a direction opposite the first direction.
In other words, stepper motor 155 generates the driving force for moving back and forth control arm 152, and control arm 152 Reciprocating movement jockey pulley 122 is moved back and forth.
Fixing device 100 includes the motor HP sensors 153 as detection unit, and motor HP sensors 153 are configured to The position of jockey pulley 122 is detected, to control amount of movement of the jockey pulley 122 in steering operation.
More specifically, control arm 152 has motor the label 152c, motor label 152c and control arm of attachment thereon 152 integrally move.Motor HP sensors (detection unit) 153 are sensors, be configured to detection home position (HP) with Operation for stepper motor 155 refers to.It is, for example, possible to use transmission optical sensor.As motor label 152c masking motors HP During light receiving unit in sensor 153, OFF signal is detected.If motor label 152c does not block motor HP sensors 153 In light receiving unit, then detect ON signals.With the rotation of stepper motor 155, CPU 10 is by motor HP sensors 153 The location determination of ON/OFF states switching is home position.
Motor HP sensors 153 are arranged so that home position is in the range that steering operation moves back and forth control arm 152 It is interior.According to this embodiment, motor HP sensors 153 are arranged so that in the range that steering operation moves back and forth control arm 152 Heart position can be home position.
According to this embodiment, it has been described that there is the construction of motor label 152c in control arm 152 as an example, horse The setting of note 152c up to standard is without being limited thereto.Motor label 152c can be arranged on from the rotary shaft 155d of stepper motor 155 to On the driving transmission path of power roller 122.In other words, the detection unit for being configured to the position of detection jockey pulley 122 can be by Be constructed to be permeable to detection jockey pulley 122 reference position, jockey pulley 122 by follow stepper motor 155 rotor rotation and It is mobile.In other words, detection unit is configured to detection by following the stepper motor for moving jockey pulley 122 The rotation of 155 rotor and the position of the component of movement.
Stepper motor
Stepper motor is to rotate turning for a rotation amount (total rotation angle) with the umber of pulse based on input pulse signal The motor of son.
Exemplary stepper motor is described referring now to Figure 12 A and 12B.
Stepper motor 155 include with permanent magnet south and north poles multiple small teeth rotor unit (rotor) 155a with And it is configured to be generated stator unit (magnetic filed generation unit) 155b in magnetic field with coil 155c.Stator unit 155b has multiple Small tooth.When the magnitude of current of coil 155c to be supplied to is switched, multiple excitation phases can be generated.Stepper motor 155 switches The excitation phase of stator unit 155b is so that rotor unit 155a rotates.Rotor unit 155a has rotary shaft 155d, and revolves The rotation of shaft 155d follows the rotation of rotor unit 155a.
When being switched the excitation phase of stator unit 155b, rotor unit 155a rotates scheduled angle with step-by-step movement Degree.In other words, total rotation angle of rotor unit 155a depends on the switching times of excitation phase.CPU 10 drives to motor 180 input pulse signal of device, the pulse signal are the signals for the rotation amount for indicating rotor unit 155.180 basis of motor driver Input pulse signal controls the magnitude of current that supply to coil 155c.The excitation phase of stator unit 155b can be according to pulse The number of signal designation switches.The rotation angle of rotor unit 155a movements is according to following formula：Rotation angle (rotation Amount)=step angle × umber of pulse, wherein step angle is the rotor list caused by a handover operation of excitation phase The rotation angle of first 155a movements.In other words, the rotor unit 155a in stepper motor 155 can be rotated believes corresponding to pulse Number angle (rotation amount).
This means that CPU 10 is used as being configured to the output list of the signal of the rotation amount of output instruction rotor unit 155a Member.Motor driver 180 is used as current control unit, which is configured to will quilt to control based on pulse signal It is supplied to the magnitude of current of coil 155c.CPU 10 and motor driver 180 are used as being configured to the rotation of control stepper motor 155 Motor control unit.
It has been described the construction of pulse signal input motor driver 180 according to this embodiment, is driven in motor Pulse signal can be generated in device 180 to control the magnitude of current that supply to coil 155c.
Band position detection unit
Sensor unit 150 (Fig. 8) is structured to the band detection unit with position in the transverse direction of detection press belt 120. Sensor unit 150 includes two band position sensor 150a and 150b, sensor mark 150c (Figure 10), sensor arm 150d With sensor spring 150e.Each band position sensor 150a and 150b are transmission optical sensors.Sensor arm 150d is passed Sensor spring 150e is pressed and with the power of 0.03N against the end face of press belt 120.Therefore, the movement of sensor arm 150d with With the movement of press belt 120 in the horizontal.Sensor mark 150c follows the movement of sensor arm 150d and rotates.Such as Figure 10 institutes Show, turned positions of the sensor mark 150c based on sensor mark 150c is come masking tape position sensor 150a and 150b.It passes Sensor cell 150 is configured to detect press belt based on the combination of the ON/OFF signals with position sensor 150a and 150b 120 position in the horizontal.
Fig. 9 shows combination and the pressure of the ON/OFF signals according to this embodiment with position sensor 150a and 150b Relationship between corresponding position with 120.Band position sensor 150a and 150b exports OFF in sensor mark 150c shadings Signal, and ON signals are exported when allowing light through.It should be appreciated that from the ON/OFF exported with position sensor 150a and 150b Relationship between the combination of signal and the corresponding position of press belt 120 is for illustrative purposes and provides, implementation of the invention Example is without being limited thereto.
According to this embodiment, press belt 120 is controlled so as to be centrally located the model of position ± 1.5mm in rotary axis direction In enclosing.CPU 10 moves back and forth control so that press belt 120 can be arranged on band position sensor 150a and 150b difference The position (+1.5mm) of output ON and OFF signal and the position for exporting OFF and ON signals respectively with position sensor 150a and 150b It puts between (- 1.5mm).In this case, center is defined as zero, and front side is represented with negative sign, and rear side positive sign table Show.
Figure 10 show position in the case where press belt 120 is between center and front side based on press belt 120 with Example relationship between ON/OFF signals with position sensor 150a and 150b with the pass between position and sensor mark System.
As shown in Figure 10, when press belt 120 is located at center (0mm), sensor mark 150c and with position sensor 150a and 150b is completely in ON states.When press belt 120 is moved to front side, sensor mark 150c is by being resisted against pressure Sensor arm 150d on end with 120 is by the operation clockwise in Figure 10.
When press belt 120 reaches the position of front side -1.5mm, sensor mark 150c masking tape position sensor 150a, So that the signal with position sensor 150a is switched to OFF state and (causes by band position sensor 150a detection sensor marks Remember 150c).At this point, still maintain output ON signals with position sensor 150b.In response to what is exported with position sensor 150a Signal is switched to OFF from ON, and CPU 10 operates stepper motor 155 so that jockey pulley 122 tilts, so as to make 120 direction of press belt Rear side moves.
Here, CPU 10 controls the steering volume of jockey pulley 122 based on the testing result of motor HP sensors 153.
More specifically, detected in response to going up the sensor unit 150 of position by being configured to 120 transverse direction of detection press belt Press belt 120 to one end deviate the fact, CPU 10 sends out order to change the steering to stepper motor 155.In other words, CPU 10 to stepper motor 155 by specifying direction of rotation (such as counterclockwise or CCW) to start to change steering direction to send out The order of rotation.CPU 10 makes stepper motor 155 keep rotation, until the logic quilt of the signal from motor HP sensors 153 Switching.
When stepper motor 155 is rotated along indicated direction, the logic of the signal from motor HP sensors 153 is cut It changes (such as becoming ON signals from OFF signal).Switching in response to the logic for detecting motor HP sensors 153, CPU 10 to Stepper motor 155 sends out rotation and orders so that it is rotated scheduled time on identical direction of rotation (such as counterclockwise or CCW) Number (such as rotation amount corresponding to 100 pulses).Thus, it is possible to obtain target diversion angle.
When the moving direction reversion (that is, press belt 120 backward side move) of press belt 120 and its position enter ± When in the range of 1.5mm, sensor mark 150c is positioned as not shielding band position sensor 150a.In other words, band position Sensor 150a exports ON signals.Band position sensor 150b keeps output ON signals.
In the case of the position being in from center to front side in press belt 120 is shown in FIG. 10, the position of press belt 120 And carrying the relationship between the ON/OFF signals of position sensor 150a and 150b, sensor unit 150 can also be from rear The position of press belt 120 is detected in the range of side to center.When press belt 120 is located at center (0mm), sensor mark 150c ON states are completely in band position sensor 150a and 150b.When press belt 120 is moved to rear side, sensor mark 150c By the sensor arm 150d of the end abutment with press belt 120 along the operation counterclockwise in Figure 10.After press belt 120 reaches During the position of side+1.5mm, sensor mark 150c shielding band position sensors 150b so that the letter with position sensor 150b Number it is switched to OFF state.At this point, still maintain output ON signals with position sensor 150a.In response to being passed to carry position The signal of sensor 150b is switched to OFF state from ON states, and CPU 10 operates stepper motor 155 so that jockey pulley 122 tilts, and makes Press belt 120 is obtained to move towards front side.
Arm 127 has arm wall surface 127a on the reciprocating movement direction of press belt 120 at the position of ± 3.5mm.Work as pressure When power band 120 is excessively mobile in the horizontal, the end face contact of arm wall surface 127a and press belt 120, this may damage press belt 120.In order to prevent this situation, the position of ± 3.0mm can be set as to mobile restriction site.When press belt 120 reaches ± During the position of 3.0mm, CPU 10 determines to break down.For example, CPU 10 terminates the operation of fixing device 100, until by more Corresponding component is changed or repaired to solve failure.In other words, CPU 10 terminates the rotation of heating tape 130 and press belt 120. CPU 10 also terminates the energization of induction heating equipment 300.The behaviour for terminating imaging unit U of the operation of fixing device 100 Make, forbid the execution of imaging operation (printing starts).
More specifically, with reference to Figure 10, when press belt 120 reaches the position of -3.0mm of the mobile restriction site as front side When, sensor mark 150c covers two band position sensors 150a and 150b.In other words, band position sensor 150a and 150b exports OFF signal.OFF signal is switched in response to band position sensor 150a and 150b, CPU 10 determines to break down. When press belt 120 reaches the position as the+3.0mm of the mobile restriction site on rear side, sensor mark 150c maskings two A band position sensor 150a and 150b.In other words, band position sensor 150a and 150b outputs OFF signal.In response to from Band position sensor 150a and 150b are switched to OFF signal, and CPU 10 determines to break down.
The synchronous missing of stepper motor
In the case that effect has larger load torque on rotor unit 155a in stepper motor 155, rotor unit The S poles of 155a and the mobile of N poles tooth may not be followed by the variation in the stator unit 155b magnetic fields generated.As a result, rotor unit Synchronizing between 155a and stator unit 155b may missing.Synchronous missing between rotor unit 155a and stator unit 155b The phenomenon that be referred to as synchronous missing.When be applied to stepper motor 155 load change very greatly when or when stepper motor 155 is defeated When the torque gone out is changed very greatly, it is possible that this synchronous deficient phenomena.Therefore, when the stepper motor of relatively large load 155 is opened Begin that the phenomenon may easily occur during rotation.
When synchronizing between rotor unit 155a and stator unit 155b lacks, and synchronous missing is unresolved, rotor Unit 155a will not be rotated in response to the variation in the magnetic field of stator unit 155b.In this case, stepper motor 155 cannot It is controlled.This phenomenon is referred to herein as and synchronizes complete missing.
When synchronizing missing generation completely, it is impossible to perform steering operation.As a result, press belt 120 may for example occur laterally The failure of mobile restriction site is displaced to, this terminates the operation of imaging device 1.This may be caused inconvenience to the user, he or She cannot use imaging device 1, until the replacement or repairing of corresponding component are completed.
On the other hand, when synchronizing slight missing, even if synchronous missing temporarily occurs, turn in stepper motor 155 The S poles of subelement 155a and N poles tooth may also be different from the position of stator unit 155b again in the phase of rotor unit 155a It is synchronous, so as to rotate stepper motor 155.This phenomenon is referred to herein as and synchronizes slight missing.In stepper motor 155 Motion process in, when stepper motor 155 starts rotation after a stop (for example, see the Figure 14 being described below, (xv)) it, may be easier to synchronize slight missing.However, even if start rotation when synchronize slightly lack after, from Motor label 152c restores to prevent from controlling rotation by when motor HP sensors 153 to it stopping, synchronizing Influence (for example, see Figure 14, (xvi) is described below to (xvii)).Therefore, steering operation is used to that jockey pulley 122 to be made to incline Tiltedly to target angle.
When synchronizing slight missing and occurring, can be inferred that may be applied with to stepper motor 155 more than normal condition but Less than the load for synchronizing complete miss status.When the load of bigger is applied to stepper motor 155, it may occur that synchronized Full missing.In other words, there is the state for synchronizing and slightly lacking can be interpreted to synchronize the sign lacked completely.
Therefore, in the imaging device of the embodiment 1, when synchronizing slight missing generation, notify user that mistake has occurred. In this case, because synchronizing slight rotor unit 155a and the stator that lacks and only may temporarily cause in stepper motor 155 Synchronous missing between unit 155b, so stepper motor 155 can continue its steering operation.Unless (example occurs for another failure Such as, press belt 120 is laterally displaced to mobile restriction site), otherwise imaging device 1 continues its imaging operation.In other words, it is fixed Device 100 does not stop operation.
This can allow the user to the hair that the failure in fixing device 100 is identified before fixing device 100 stops operation It is raw.User can (such as after ongoing printing is completed) be replaced or is repaired accordingly when an opportunity arises at him or she Component, so as to improve the convenience of user.
Detection synchronizes the method slightly lacked
In the following, it will describe to detect the method for synchronizing and slightly lacking.
Figure 14 shows the variation that the angle pulse after slightly lacking is synchronized in stepper motor.
Here, term " angle pulse " refers to the number of pulses specified by CPU 10.Angle pulse corresponds to by CPU 10 The rotation angle (rotation amount) of the rotor unit 155a of instruction.The counter of diagram is configured to based on the rotation indicated by CPU 10 Turn that direction is positive or negative and number of pulses is that the hypothesis of absolute value is counted.More specifically, make stepping in the outputs of CPU 10 Motor adds in a first direction on (such as CW directions) in the case of the command signal of 100 pulses of rotation to the value of counter 100.Stepper motor is made to rotate 100 in the second direction (for example, CCW directions) opposite with first direction in the outputs of CPU 10 In the case of the command signal of pulse, 100 are subtracted from the value of counter.
Figure 14, which is shown, to be represented by the longitudinal axis of the count value of the angle pulses instructed of CPU 10.It is assumed that angle pulse value It is equal to 0 in normal original position.Symbol "×" in Figure 14 represents that the rotation of stepper motor 155 causes motor label 152c to lead to Cross the position of motor HP sensors 153 (when the ON/OFF states of motor HP sensors 153 are switched).Figure 14 is further shown Represent the horizontal axis of time passage.More precisely, in Figure 14 from (i) to (iii) and from (iv) to the period of (vi) also sometimes Between pass, time (i) and (iii) are not identical clock times with time (iv) and (vi), although they illustrate in fig. 14 Show to property.
With reference to figure 14, there is normal condition by the region of arrow (A) instruction, do not synchronize slight missing.At (i), work as biography When sensor cell 150 detects that press belt 120 is located at angulation change position (such as -1.5mm), stepper motor 155 is (inverse along CCW Hour hands) direction rotates.CPU 10 make stepper motor 155 holding be rotated up its by motor HP sensors 153 (in fig. 14 from (i) in the period of (ii)).Detect that motor label 152c passes through at (ii) in response to the rotation due to stepper motor 155 Motor HP sensors 153, CPU 10 send signal to rotate 100 pulses along CCW directions and then stop to stepper motor 155. Stepper motor 155 makes excitation phase change the number corresponding to this 100 pulses, and stops rotor unit 155a (figures at (iii) 14 (ii) to (iii) period).If sensor unit 150 detects that press belt 120 is located at angulation change position at (iv) (such as+1.5mm), then CPU 10 stepper motor 155 is made to be rotated along CW (clockwise) direction.CPU 10 protects stepper motor 155 It holds and is rotated up it and passes through motor HP sensors 153 (in fig. 14 from (iv) to the period of (v)).In response to due to stepper motor 155 rotation and detect motor label 152c by motor HP sensors 153 at (v), CPU 10 is sent to stepper motor 155 Then signal is stopped with rotating 100 pulses along CW directions.Stepper motor 155 changes its excitation phase and corresponds to this 100 The number of pulse, and stop rotor unit 155a (period of (v) of Figure 14 to (vi)) at (vi).It is repeated during steering operation The cycle.
On the other hand, in the case where synchronizing slight missing, when motor label 152c passes through motor HP sensors 153 When, the value of angle pulse counter deviates the value (zero) in the region represented by arrow (A).The state is by the arrow in Figure 14 (B) it represents.
Detect that motor label 152c is sensed by motor HP at (xiii) in response to the rotation due to stepper motor 155 Device 153, CPU 10 send signal to be rotated in the counterclockwise direction 100 pulses and then stop to stepper motor 155.Stepper motor 155 change excitation phase the number corresponding to this 100 pulses, and stop rotor unit 155a ((xiv) in fig. 14). If sensor unit 150 detects that press belt 120 is located at angulation change position (such as+1.5mm) at (xv), CPU 10 makes Stepper motor 155 is rotated along CW (clockwise) direction.CPU 10 makes the holding of stepper motor 155 be rotated up it by motor HP biographies Sensor 153.Detect that motor label 152c is sensed by motor HP at (xvi) in response to the rotation due to stepper motor 155 Device 153, CPU 10 send signal to rotate 100 pulses along CW directions to stepper motor 155, then stop.
When synchronizing slight missing, before stepper motor 155 is by motor HP sensors 153 (in fig. 14 from (xv) in the period of (xvi)) the change number of excitation phase increases, although stepper motor 155 rotates.In other words, exist (xvi), when stepper motor 155 is by motor HP sensors 153, the value of angle pulse counter is not equal to 0 (such as 10). Imaging device 1 detects this point and provides error notice according to this embodiment when synchronizing slight missing generation.
Imaging device 1 includes counter (counting unit), which is configured to indicate stepper motor 155 to CPU 10 Angle pulse (the change number of rotation amount, umber of pulse or excitation phase) counted.For inclining for change tension force roller 122 Tilted direction, counter be configured to before stepper motor 155 is by motor HP sensors 153 (for example, from (xv) in Figure 14 To the period of (xvi)) angle pulse that is indicated to stepper motor 155 counted,.If the variable quantity of the value of counter is more than Predetermined value, then CPU 10 is determining synchronizes slight missing.
According to this embodiment, imaging device 1 includes counter C, and counter C is configured to pair and is indicated to stepper motor The change frequency of the 155 corresponding excitation phase of angle pulse is counted, as shown in the longitudinal axis in Figure 14.(storage is single by RAM Member) 600 a part of storage region be used as counter C.When stepper motor 155 is rotated along CW directions (for example, in fig. 14 from The period of (iv) to (vi)), in the case where the value X of home position counter C is equal to 0, the value of 10 count-up counter C of CPU. (for example, in fig. 14 from (i) to the period of (iii)), 10 countdowns of CPU when stepper motor 155 is rotated along CCW directions The value of device C.CPU 10 turns to the value of the counter C when stepper motor 155 is by motor HP sensors 153 and last time Value in operation is compared.Whether it is more than predetermined value according to variable quantity, it is determined whether synchronize slight missing.
Even if come from motor HP sensings being sent to after stepper motor 155 have passed through predetermined period from rotation instruction The signal of device 153 does not also change, CPU 10 determine stepper motor 155 do not rotate (or determine to have occurred and that synchronize completely lack It loses).
Stepper motor controls
The control of stepper motor according to this embodiment is described below with reference to Fig. 1 to Fig. 3.
Figure 13 is the block diagram for showing the construction related with control.CPU 10 is electrically connected to 601 Hes of ROM (read-only memory) RAM (random access memory) 600.Flow operation shown in figure as the CPU 10 of control unit by being based on being stored in ROM Control program in 601 performs.CPU 10 uses RAM 600 as the workspace for the processing in execution control program.
As shown in figure 13, CPU 10 is electrically connected to RAM 600, ROM 601 and wants controlled mechanism.More specifically, CPU 10 are electrically connected to band position sensor 150a and 150b, motor HP sensors 153, IH heaters 135, drive motor 603, imaging Unit U, operating unit 24 and power switch 602.CPU 10 is electrically connected by motor driver 180 with stepper motor 155, is used in combination It is configured to the motor control unit of the driving of control stepper motor 155.CPU 10, which is also served as, is configured to control drive motor 603 Rotation control unit.
Timer 604 is described below with reference to the construction according to the 5th embodiment.
According to this embodiment, CPU 10 have for control the multiple functions of the mechanism in imaging device 1 (such as with Make motor control unit and rotation control unit).However, CPU or control electricity can be provided for each in multiple functions Road.
Fig. 1 is shown at the time of power switch 602 is switched on to the stream of processing at the time of rotation press belt 120 Cheng Tu.Flow chart in Fig. 1 is routed to the flow chart in Fig. 2.
According to this embodiment, the control stream to be performed in the imaging device 1 with following setting is described using as example Journey.
More specifically, the angulation change position on front side has been in addition to press belt 120 when power switch 602 is connected It puts except the situation of (- 1.5mm), as stepper motor 155 rotates up predetermined angular pulse in CW side, press belt 120 starts Rotation.In other words, after the rotation of press belt 120, press belt 120 starts to front side lateral shift.
In the case where stepper motor 155 is rotated along CW directions, when motor label 152c passes through motor HP sensors 153 When, motor HP sensors 153 output it signal and change into OFF signal from ON signals.On the contrary, in stepper motor 155 along CCW side In the case of rotation, when motor label 152c passes through motor HP sensors 153, motor HP sensors 153 output it letter Number change into ON signals from OFF signal.
The group of testing result that Fig. 9 shows position in the transverse direction of press belt 120 and provided by sensor unit 150 It closes.
While following processing shown in execution flow chart, CPU 10 checks whether press belt 120 is located at mobile limit Position (± 3.0mm) processed.That is, CPU 10 monitors the output to carry position sensor 150a and 150b.In response to detecting two A band position sensor 150a and 150b have OFF state, and CPU 10 interrupts following processing, and fixing device 100 is held Row error stops.
With reference to Fig. 1, the processing in S101 to S107 checks the operation performed by mechanism relevant with steering operation.
When operator opens the power switch 602 in imaging device 1, CPU 10 obtains the ON/ of motor HP sensors 153 OFF state, and determine that motor HP sensors 153 are in ON states or OFF state (S101).
If CPU 10 determines that motor HP sensors 153 are in ON states (S101, yes), then CPU 10 makes stepper motor 155 rotate (S106) along the direction (being CW directions according to this embodiment) of the reaction for changing motor HP sensors 153.It changes Sentence is talked about, and CPU (output unit) 10 sends the life for stepper motor 155 to be made to be rotated up in CW side to motor driver 180 Enable signal.This means that CPU 10 is used as output unit, which is configured to output and is used to indicate rotor unit 155a Rotation amount signal and be used to indicate rotor unit 155a direction of rotation signal.Motor driver (current control unit) 180 controls will be supplied to the amount of the electric current of coil 155c, so that stepper motor 155 is rotated up in CW side, so as to change excitation Phase.
Whether CPU 10 keeps stepper motor 155 to be rotated along CW directions, and determine motor HP sensors 153 in predetermined period It reacts (S107) in interior (such as in 1.0 seconds).Therefore, check whether the mechanism related with steering operation be faulty.
Even if stepper motor 155 keeps being rotated in the anti-of predetermined period inner motor HP sensors 153 on CW directions OFF state (S107, no) should not be become yet, then CPU 10 determines that the mechanism for being related to steering operation is faulty and performs error Stop (S104).In other words, CPU 10 is used as being configured to forbid what imaging device 1 performed operation to forbid unit.Imaging is set Standby 1 forbids fixing device 100 to operate, unless solving failure.
On the other hand, if motor HP sensors 153 are in OFF state (S101, no) in S101, then CPU 10 causes Stepper motor 155 changes in motor HP sensors 153 rotates (S102) on the direction (i.e. in CCW directions) of its reaction.
Whether CPU 10 makes stepper motor 155 keep rotating along CCW directions, and determine motor HP sensors 153 predetermined It is interior (such as in 1.0 seconds) in period to react (S103).Therefore, it can check whether the mechanism related with steering operation has Failure.
Even if stepper motor 155 keeps rotation motor HP sensors 153 also not in predetermined period on CCW directions Interior to export ON signals (S103, no), then CPU 10 determines that the mechanism for being related to steering operation is faulty and performs error stopping (S104)。
If since stepper motor 155 passes motor HP caused by by CPU 10 along the continuous rotation on CCW directions Sensor 153 is changed to output ON signals (S103, yes) in scheduled time slot, then handles progress to S105.According to this embodiment, Stepper motor 155 rotates up scheduled angle pulse in CW side, and press belt 120 starts to rotate.Therefore, CPU 10 makes step It is rotated (S105) into motor 155 along CW directions.Even if stepper motor 155 keeps rotation motor HP sensors on CW directions OFF state (S107, no) is not changed into 153 reaction in scheduled time slot yet, then CPU 10 is determined related to steering operation Mechanism malfunction and perform error stop (S104).
It is described the operation inspection that pair mechanism related with steering operation performs.
In the following, in S108 to S117, the position of stepper motor 155 is adjusted, press belt 120 starts to rotate.
Because with reference to the angle pulse when reaction of motor HP sensors 153 is changed to OFF state in S107, CPU 10 will be configured to be set as initial value (S108) to the value X of the counter C of angle step-by-step counting.More specifically, it sets Relationship X=0.
In response to the change of the reaction of motor HP sensors 153 in S107, CPU 10 sends to stepper motor 155 and orders It enables.More specifically, CPU 10 sends command signal so that stepper motor 155 rotates predetermined angular pulse (such as 100 along CW directions A pulse), and pulse stops stepper motor 155 (S109) at a predetermined angle.
CPU 10 pair to count with the corresponding value of angle pulse rotated in S109 using counter C (S110)。
Here, CPU 10 is changed based on the output of sensor unit 150 to determine that press belt 120 whether there is in front side angle Become position (- 1.5mm) (S111).More specifically, determining whether band position sensor 150a is in ON states.
If being in ON states (S111, yes) with position sensor 150a, then press belt 120 is not at front side angulation change Position (- 1.5mm).Therefore, CPU 10 controls drive motor 603 so that press belt 120 starts to rotate (S112).CPU 10 makes place Reason proceeds to the S201 of Fig. 2.
On the other hand, if being in OFF state (S111, no) with position sensor 150a, then press belt 120 is in front side Angulation change position (- 1.5mm).Therefore, CPU 10 makes stepper motor 155 be rotated (S113) along CCW directions.If in stepping horse After being rotated up to 155 along CW directions, the press belt 120 at front side angulation change position (- 1.5mm) rotates, then rotation Press belt 120 may be moved to the mobile restriction site (- 3.0mm) in front side later.
For each pulse, CPU 10 sends order until motor HP sensors 153 are changed to motor driver 180 For ON states, and stepper motor 155 is rotated along CCW directions.CPU 10 uses C pairs of counter and rotation angle pulse Corresponding value is counted down (S114).
If since the rotation in S113, motor HP sensors 153 are not made in predetermined period (in such as 0.5 second) It reacts (or keeping its OFF state) (S115, no), then CPU 10 makes processing proceed to S104.CPU 10 is determined and steering operation Related mechanism is faulty and performs error stopping (S104).
CPU 10 changes into ON states in S115 in response to motor HP sensors 153 and sends commands to stepper motor 155.More specifically, CPU 10 sent to stepper motor 155 order so that its to rotate up in CCW side predetermined angular pulse (all Such as 100 pulses), and pulse stops stepper motor 155 (S116) at a predetermined angle.Later, CPU 10 opens press belt 120 Begin to rotate (S118).Here, CPU 10 is fallen for C pairs using counter with the corresponding value of angle pulse rotated in S116 It counts (S117).After S118, processing is proceeded to the S210 in Fig. 2 by CPU10.
Fig. 2 is to the stream of steering operation performed when performing and malfunctioning and stop at the time of showing to rotate since press belt 120 Cheng Tu.With reference to the flow chart in figure 2, in addition to fixing device 100 undergoes error stopping, press belt 120 keeps rotation.Imaging is set Standby 1 performs steering operation while press belt 120 rotates, to move back and forth control to press belt 120.
In the centre of the flow chart of Fig. 2, if CPU 10 receives imaging instruction and (such as prints sign on or duplicate and open Begin to instruct), then CPU 10 performs the imaging instruction received.Moreover, perform with the corresponding imaging operation of imaging instruction with And while fixing processing, as shown in Fig. 2, continuing steering operation in fixing device 100.
In the centre of the flow chart of Fig. 2, when power switch 602 disconnects, CPU 10 interrupts the place in the flow chart of Fig. 2 Reason, to stop the rotation of press belt 120.
The press belt 120 for starting rotation in the S112 of Fig. 1 starts while rotating to front side lateral shift.If band Position sensor 150a is changed in OFF state (S201, yes), then CPU 10 makes processing advance to S202.When band position When sensor 150a is changed in OFF state, press belt 120 is placed at front side angulation change position (- 1.5mm).
In order to which press belt 120 is moved to rear side, CPU 10 makes stepper motor 155 be rotated (S202) along CCW directions.For Each pulse, CPU 10 sends to motor driver 180 and orders, until motor HP sensors 153 become ON states, and make step It is rotated into motor 155 along CCW directions.CPU 10 is counted down using C pairs of value corresponding with the angle pulse rotated of counter (S203).Correspond to the example states of S203 Counters C countings in Figure 14 to the period of (ii) from (i).
If motor HP sensors 153 are not made in predetermined period (in such as 0.5 second) since being rotated S202 Go out reaction (or keeping its OFF state) (S204, no), then processing is proceeded to S205 by CPU 10.CPU (forbidding unit) 10 is determined Being related to the mechanism of steering operation has failure and performs error stopping (S205).The error is stopped, imaging device 1 is forbidden Fixing device 100 operates, unless solving failure.More specifically, CPU 10 controls drive motor 603 in S205, stop adding Pressure roller 121 rotates and stops the energization to IH heaters 135, except non-faulting is resolved.Unless solves failure, otherwise CPU10 also forbids performing the imaging operation performed by imaging unit U.
ON states are switched in S204, CPU 10 will be in S204 by motor HP sensors in response to motor HP sensors 153 The 153 value X for being switched to ON state hour counters C are stored in the presumptive area (S206) on RAM 600.Then it performs to determine Whether the program (S207) that slightly lacks is synchronized.It is described below and determines whether to synchronize the program slightly lacked.
With reference in S204 motor HP sensors 153 be switched to the situations of ON states, CPU 10 is sent out to stepper motor 155 It loses one's life order.More specifically, CPU 10 makes it rotate up predetermined angular pulse (such as in CCW side to the transmission of stepper motor 155 100 pulses) order and the order (S208) that stops after stepper motor 155 rotates predetermined angular pulse.CPU 10 It is counted down (S209) with the corresponding value of angle pulse rotated in S208 for C pairs using counter.From (ii) in Figure 14 Period to (iii) corresponds to the exemplary status of S209 Counters C countings.
The steering operation performed in S202 to S208 tilts jockey pulley 122, and press belt 120 is moved to rear side. Therefore, press belt 120 is while rotating to rear side lateral shift.
After S209 or after S118 (Fig. 1), after press belt 120 rotates a little while, press belt 120 is placed in rear side angle Degree changes at position (+1.5mm).Band position sensor 150b is switched to OFF state from ON states.As band position sensor 150b It is changed to during in OFF state (S210, yes), CPU 10 makes processing proceed to S211.
Because press belt 120 is moved towards front side, CPU 10 makes stepper motor 155 be rotated along CW directions (S211).For each pulse, CPU 10 sends order until motor HP sensors 153 become OFF to motor driver 180 State, and stepper motor 155 is made to be rotated along CW directions.CPU 10 uses C pairs of counter and the corresponding value of rotation angle pulse It is counted (S212).Correspond to the example states counted in S211 Counters C in Figure 14 to the period of (v) from (iv).
If motor HP sensors 153 are not made in predetermined period (such as 0.5 second) since being rotated in S211 It reacts (or keeping its ON state) (S213, no), then CPU10 makes processing proceed to S205.CPU 10 determines have with steering operation The mechanism of pass is faulty and performs error stopping (S205).
In response to motor HP sensors 153 are switched to OFF state in S213, CPU 10 ought be in S213 by motor The value X of counter C when HP sensors 153 are switched to OFF state is stored to the presumptive area (S214) on RAM 600.So The execution of CPU 10 afterwards is used to determine whether to synchronize the program (S215) slightly lacked.It is described below and determines whether to occur together Walk the program slightly lacked.
With reference in S213 motor HP sensors 153 be switched to the situation of OFF state, CPU 10 is to stepper motor 155 Send order.More specifically, CPU 10 makes it rotate up predetermined angular pulse (such as in CW side to the transmission of stepper motor 155 100 pulses) order and the order (S216) that stops after stepper motor 155 rotates predetermined angular pulse.CPU10 It is counted (S217) with the corresponding value of angle pulse rotated in S216 for C pairs using counter.In Figure 14 from (v) to (vi) period corresponds to the example states that S217 Counters C is counted.
The steering operation performed in S211 to S216 tilts jockey pulley 122, and press belt 120 is moved to front side. Therefore, press belt 120 is lateral offset to front side while rotating.
After S217, CPU 10 is back to S201 and repeats the process flow in S201 to S217.Therefore, in pressure It is performed on band 120 and moves back and forth control.
Determine whether that generation is synchronous in S207 and (as shown in Figure 2) in S215 below with reference to Fig. 3 descriptions slightly to lack Program.Fig. 3 is to show to determine whether to synchronize the flow chart slightly lacked according to this embodiment.According to this embodiment, CPU 10 based on whether when motor, that 152c is marked to come more than threshold value by the variable quantity of the value X of 153 hour counter C of motor HP sensors is true It is fixed whether to synchronize slight missing.More specifically, following handle will be performed.
After the connection of power switch 602, CPU 10 determines whether determining program shown in Fig. 3 is to perform for the first time (S301)。
If performing determining program shown in Fig. 3 (S301, yes) for the first time, then CPU 10 will immediately determine program (S206 Or S214) before the value X of counter C that stores be set as X0, and (S302) is stored it in RAM 600.If for the first time Determining program shown in Fig. 3 is performed, then CPU 10 terminates to determine program.
If determining program shown in Fig. 3 is not to perform (S301, no) for the first time, then CPU 10 is calculated when motor marks 152c passes through the variable quantity △ X of the value X of 153 hour counter C of motor HP sensors.The embodiment assumes △ X=| X-X0|。
CPU 10 determines whether the variable quantity △ X calculated in S303 are more than threshold value (S304).The threshold value is preset value And it is stored in RAM 600.For example, according to this embodiment, if △ X>6 (a pulses), then CPU 10 determine variable quantity △ X More than threshold value.
If variable quantity △ X are more than threshold value (S304, yes), then CPU (notification unit) 10 determines to have synchronized slight missing Occur and notify to have occurred wrong (S305).
In other words, the variable quantity △ X notices of output and counter C of the CPU 10 based on motor HP sensors 153 occur Wrong (confirmation of the reservation), counter C are configured to count the rotation amount of rotor unit 155a indicated by CPU 10.
More specifically, display device (display unit) displays of the CPU (display control unit) 10 into operating unit 24 Inform the message that mistake has occurred.Here content to be shown can be preset.For example, it can show such as " fixation facility In break down " or message such as " liaison maintenance personnel ".Preferably, the message for informing the type that mistake occurs can be shown, it is all Such as " synchronizing slight missing occurring " or " mistake related with steering operation is occurring ".Thus, it is possible to inform operation Person has occurred and that failure in fixing device 100.Notification method is not limited to show on the display apparatus, but can for example pass through Audio notifies to malfunction.
Here, slight missing (S304, yes) is synchronized even if having occurred and that, CPU 10 does not stop the operation of imaging device 1 yet. In other words, the rotation of press belt 120 does not stop in fixing device 100.In other words, the CPU as motor control unit 10 control drive motors 603 that press belt 120 is kept to rotate.In the case where being carrying out imaging operation, held by imaging unit U Capable imaging operation and the fixing operation continuation performed by fixing device 100.In the standby mode for the input for waiting for imaging instruction Under, it is not prohibited by the execution of input imaging instruction.However, as exception, error stopping slightly being lacked and is related to not synchronizing Failure with it is synchronous slightly lack it is simultaneous in the case of, the operation of imaging device 1 can be forbidden.
It is new that CPU 10 will immediately determine before program that the value X of the counter C of (or in S206 or S214) storage is used as X0It is stored in RAM 600 (S306), and terminates to determine program.
In S304, if variable quantity △ X are no more than threshold value (S304, no), then processing is proceeded to S306 by CPU 10.
Second embodiment
According to first embodiment, based on when motor label 152c by 153 hour counter C of motor HP sensors value X with Passed through the value X of 153 hour counter C of motor HP sensors when motor label 152c last time0Between variable quantity determine whether to send out Life synchronizes slight missing.More specifically, determining program shown in Fig. 3 compares the value X at (xiii) and (xvi) in Figure 14.
However, when motor label 152c can be carried out by the value X of 153 hour counter C of motor HP sensors with initial value Compare.In other words, if the variable quantity compared with the initial value X of counter C is more than threshold value, it is determined that have occurred and synchronize slightly Missing.For example, referring to Figure 14, compare the value (X=10) at value (X=0) and (xvi) at (ii).
With reference to Fig. 1 and 2 and according to first embodiment and Figure 15, will second embodiment be described.CPU 10 is by the S108 of Fig. 1 The initial value X=X of the counter C of middle setting0It is stored in RAM600.According to this embodiment, CPU 10 is performed shown in figure 15 Processing, the determining program as the S207 in Fig. 2 and S215.
CPU 10 calculates the variable quantity △ X by the value X of 153 hour counter C of motor HP sensors as motor label 152c (S401).This embodiment assumes X=| X-X0|.Here, X0The initial value of counter C set in the S108 for being Fig. 1.
CPU 10 determines whether the variable quantity △ X calculated in S401 are more than threshold value (S402).The threshold value be preset value simultaneously It is stored in RAM 600.For example, according to this embodiment, if △ X>50 (a pulses), then CPU 10 determine variable quantity △ X More than threshold value.
If variable quantity △ X are more than threshold value (S402, yes), then CPU 10, which determines to have occurred, synchronizes slight missing, notice hair It has given birth to wrong (S403), and has terminated to determine program.Because the details of the processing in S403 is thin with the processing in S305 (Fig. 3) Save it is identical, so repetitive description will be omitted.As S305 (Fig. 3), CPU 10 does not stop what is being performed by imaging device 1 Operation.In other words, the rotation of press belt 120 does not stop in fixing device 100.
If variable quantity △ X are not more than threshold value (S402, no) in S402, then CPU 10 terminates to determine program.
Because the rest part of construction is identical with the first embodiment, repeated description will be omitted.
According to this embodiment, it has been described that the initial value of counter C set in the S108 in Fig. 1 is equal to X0, pressing Power band 120 can perform the processing for stepper motor 155 to be caused to operate before starting rotation, so that can be by multiple operations Average value be determined as X0.For example, it performs to determine X between S107 and S108 that can be in Fig. 10Processing.
More specifically, repeat following operation (I) to (IV).
After motor HP sensors 153 become OFF state, stepper motor 155 rotates 100 pulses along CW directions, so After stop.
Stepper motor 155 is rotated along CCW directions, until motor HP sensors 153 change into ON states, and obtain and work as horse The value X of ON state hour counters C is changed into up to HP sensors 153.
After motor HP sensors 153 become ON states, stepper motor 155 rotates up 100 pulses in CCW side, Then stop.
Stepper motor 155 is rotated up motor HP sensors 153 on CW directions and becomes ON states, and obtain and work as motor HP sensors 153 become the value X of OFF state hour counter C.
For example, the direction of rotation regardless of stepper motor 155, is X in the average value of four rotation process0Situation Under, CPU 10 can obtain four value X twice with repetitive operation (I) to (IV).CPU 10 can be by obtained four value X's Average value is determined as X0, and store it in RAM 600.In program is determined, CPU 10 is by X0With the value determined in processes X0It compare to determine if to synchronize slight missing.
The structure of the embodiment can also provide the effect similar with first embodiment.
3rd embodiment
According to first embodiment, as shown in the longitudinal axis in Figure 14, Counter C counts, and based on as motor label 152c Determine whether to synchronize slight missing by the variable quantity of the value X of 153 hour counter C of motor HP sensors.For example, referring to Figure 14 can compare the value (X=10) at value (X=0) and (xvi) at (xiii).
According to third embodiment, counter C is configured to pair the angle arteries and veins with stepper motor 155 is made to be rotated within a period Corresponding value Y is rushed to be counted, the period be from press belt 120 be located at angulation change position at the time of to motor label 152c warp Spend period at the time of motor HP sensor 153.Then, the variable quantity of value Ys of the CPU 10 based on counter C determines whether to send out Life synchronizes slight missing.It, can be by the count value (Y=100) of (xii) to (xiii) and (xv) to (xvi) for example, referring to Figure 14 Count value (Y=110) be compared.
More specifically, following handle will be performed.CPU 10 is using C pairs of counter and makes stepper motor 155 within a period The corresponding value Y of angle pulse of rotation is counted, which is to detect that press belt 120 is located at angle from sensor unit 150 Period at the time of passing through motor HP sensor 153 to motor label 152c at the time of degree changes position.If immediately determining The value Y counted before program the and value Y counted before immediately last time determines program0Absolute value of the difference higher than threshold value, then exist It is used to determine whether to synchronize CPU 10 in the program slightly lacked and determines occurred synchronizing slight missing.If immediately Determine the value Y counted before program and the value Y counted before immediately last time determines program0Absolute value of the difference be not higher than threshold Value, then CPU 10 is determining does not synchronize slight missing.Since the rest part of construction is identical in first embodiment, Repetitive description will be omitted.
According to this embodiment, it has been described that detect that press belt 120 is located at angulation change position by sensor unit 150 It puts and flip-flop number C is started counting up, counting can start in the time earlier.It, can be by (x) extremely for example, referring to Figure 14 (xiii) count value in (passing through (xi) and (xii), wherein Y=200) (is passed through with the count value in (xiii) to (xvi) (xiv) and (xv), wherein Y=210) it is compared.
According to this embodiment, regardless of the direction of rotation of stepper motor 155,152c will be marked to pass through motor HP in motor The value Y of 153 hour counter C of the sensor and value Y for passing through 153 hour counter C of motor HP sensors in motor label 152c last time0 It is compared.However, it is also possible to each direction of rotation for stepper motor 155 is counted.For example, referring to Figure 14, can incite somebody to action (ix) to the count value (YC=100) in (x) and the count value (YC=110) in (xv) to (xvi) is compared.
More specifically, pass through from the time of detecting that press belt 120 is located at angulation change position to motor label 152c During period at the time of motor HP sensor 153, C pairs of counter makes what stepper motor 155 was rotated up in CW side with being used for The corresponding value YC of angle pulse is counted.From at the time of detecting that press belt 120 is located at angulation change position to motor During period at the time of 152c is marked by motor HP sensor 153, D pairs of counter makes stepper motor 155 along CCW with being used for The corresponding value YD of angle pulse that direction rotates is counted.In synchronizing slight missing and determining program, if based on counting The value YC that device C is counted before immediately program the is determined and value YC counted before immediately last time determines program0Between difference Absolute value is more than threshold value, and CPU 10, which determines to have occurred and that, synchronizes slight missing.Counter D is also such.
According to this embodiment, for synchronize determining of slightly lacking based on before immediately program is determined the value Y that counts with The value Y counted before immediately last time determines program0Between comparison result.However, it is counted before the immediately first determining program Several values can be defined as Y0.In other words, before immediately program is determined the value Y that counts with the immediately first determining program it The value Y of preceding counting0Between absolute value of the difference be more than threshold value in the case of, synchronize the CPU 10 in the determining program slightly lacked It can determine to have occurred and that and synchronize slight missing.For example, referring to Figure 14, (iv) can be compared to the count value (Y=in (v) 100) and (xv) to (xvi) in count value (Y=110).
According to this embodiment, for synchronize the determining program slightly lacked can compare immediately determine program before count Value Y and multiple determining operations average value Y0.For determining Y0The operating process of stepper motor 155 can be in press belt 120 Start to perform (such as between S107 and S108 in Fig. 1) before rotation.
More specifically, CPU 10 is repeated several times following operation (I) to (IV) and obtains multiple value Y of counter C.CPU 10 Using the average value of multiple value Y obtained as Y0Be stored in RAM 600, and in program is determined by its in processing really Fixed value Y0It is compared, to determine whether to synchronize slight missing.
After motor HP sensors 153 become OFF state, the rotation angle pulse on CW directions of stepper motor 155 is right After stop, the angle pulse be equal to for steering operation angle pulse.
Stepper motor 155 is rotated along CCW directions, until motor HP sensors 153 become ON states, and obtain and work as motor HP sensors 153 become the value Y of ON state hour counters C.
After motor HP sensors 153 become ON states, make the rotation angle pulse on CCW directions of stepper motor 155 Then stop, which is equal to the angle pulse for steering operation.
Stepper motor 155 is rotated along CW directions, until motor HP sensors 153 become OFF state, and obtain and work as motor HP sensors 153 become the value Y of OFF state hour counter C.
For example, the average value in four rotation process unrelated with the direction of rotation of stepper motor 155 is Y0In the case of, CPU 10 can obtain four value Y twice with repetitive operation (I) to (IV).CPU 10 can be by the flat of obtained four value Y Mean value is determined as Y0。
The construction of the embodiment can also provide the effect similar with first embodiment.
Fourth embodiment
According to third embodiment, C pairs of counter is corresponding with making the angle pulse that stepper motor 155 rotates within a period Value Y is counted, the period be from press belt 120 be located at angulation change position at the time of to motor label 152c pass through motor HP Period at the time of sensor 153.Then, the variable quantity of value Ys of the CPU 10 based on counter C is light to determine whether to synchronize Degree missing.For example, with reference to figure 14, by count value (count value and (xv) to (xvi) in Y=100 in (xii) to (xiii) In count value (Y=110) be compared.
According to fourth embodiment, it is same whether CPU 10 more than threshold value can determine whether to occur based on the value Y of counter C Missing that step is slight.In other words, instead of the variable quantity of the value Y of counter C, directly determine whether to occur with the value Y of counter C Synchronize slight missing.
Here, threshold value can be pre-stored in RAM 600 or ROM 601.CPU 10 is using C pairs of counter and makes step The corresponding value Y of angle pulse rotated within a period into motor 155 is counted, which examined from sensor unit 150 It measures at the time of passing through motor HP sensor 153 to motor label 152c at the time of press belt 120 is located at angulation change position Period.If the value Y calculated before immediately program is determined is more than the threshold value being stored in advance in RAM 600 or ROM 601, It determines to have occurred and that for synchronizing the CPU 10 in the determining program slightly lacked and synchronizes slight missing.If immediately determining journey The value Y calculated before sequence is less than the threshold value being stored in advance in RAM 600 or ROM 601, then is used to synchronize what is slightly lacked Determine that the CPU 10 in program determines not yet to synchronize slight missing.
Because the rest part of the construction is identical with second embodiment, repeated description will be omitted.
The construction of the embodiment can also provide the effect similar with first embodiment.
5th embodiment
According to first to fourth embodiment, outputs of the CPU 10 based on motor HP sensors 153 and it is configured to CPU The variable quantity of the value of counter or absolute value that the rotation amount of the rotor unit 155a of 10 instructions is counted determines whether to send out Life synchronizes slight missing, and mistake has occurred if it is determined that noting that.
According to the 5th embodiment, outputs of the CPU 10 based on motor HP sensors 153 and for by jockey pulley 122 from benchmark The time that position is placed in a predetermined position determines whether to synchronize slight missing.
It will pay close attention to below and describe the embodiment with the difference of first embodiment, and will omit about first and the Any repeated description of five embodiments.
Imaging device 1 includes the timer 604 (Figure 13) for being electrically connected to CPU 10 according to this embodiment.Timer 604 As time measuring unit, which is configured to measure in steering operation from 10 output orders of CPU so as to turn Subelement 155a along predetermined direction rotate at the time of to period at the time of detecting that jockey pulley 122 is located at precalculated position.Here, It is detected by motor HP sensors (detection unit) 153 position of jockey pulley 122.
What application here was identical with the first embodiment senses for moving back and forth the control of band, steering operation and motor HP The detection method of device.
Detection synchronizes the method slightly lacked
Similar with the first embodiment with reference to Figure 14 descriptions, when synchronizing slight missing, CPU 10 is in fig. 14 Instruction angle pulses (umber of pulse) more more than normal condition in (xv) to (xvi).Period (xv) to (xvi) in Figure 14 is corresponding Detect that motor label 152c passes through to motor HP sensors 153 at the time of being rotated since stepper motor 155 along CW directions At the time of period.As first embodiment, since motor HP sensors 153 detect the time in home position, CPU 10 make stepper motor 155 rotate predetermined pulse (being in the first embodiment 100 pulses) along CCW directions, then stop step Into the rotation of motor.Therefore, the location of when jockey pulley 122 is rotated stepper motor 155 along CW directions to During steering operation of the power roller 122 the location of when motor HP sensors 153 detect that motor label 152c passes through, Power roller 122 moves substantially equivalent distance always in reciprocating movement.
Here, when CPU 10 has the pulse signal of identical pulse frequency to the input of motor driver 180, stepper motor 155 can be rotated with identical speed.In other words, when stepper motor 155 is rotated with identical speed, for making jockey pulley 122 times moved a certain distance with the pulse of the pulse signal of motor driver 180 to be assigned to quantity increase and Increase.
According to this embodiment, timer 604 is provided, measurement is configured to and exports to make rotor unit from CPU 10 To period at the time of detecting that jockey pulley 122 is located at precalculated position at the time of the instruction that 155a is rotated along predetermined direction.By counting When device 604 measure period be stored in a part for the storage region in RAM 600.CPU 10 will be surveyed by timer 604 The period of amount is compared with the corresponding period in last time steering operation, has been sent out if knots modification is determined that beyond predetermined value Life synchronizes slight missing.
Even if it is sensed after predetermined period from motor HP from being sent rotation order to stepper motor 155 The signal of device 153 does not also change, then CPU 10 determine stepper motor 155 without rotation (or have occurred and that synchronize completely lack It loses).Predetermined period is arranged to than under normal circumstances and synchronizing and being sent to stepper motor 155 in the case of slight missing The period that the detection of motor HP sensors 153 is played in rotation order will be grown.
Specific control
In the following, with reference to Figure 14 according to first embodiment, will describe to rotate since press belt 120 according to the 5th embodiment The specific control of the steering operation stopped to error.Similar with first embodiment, imaging device 1 rotates press belt 120, simultaneously Steering operation is performed to move back and forth control to press belt 120.
Start rotation after press belt 120 start while press belt 120 rotates it is laterally inclined towards side in the horizontal It moves.It is assumed that laterally side deviates press belt 120 forward.
When band position sensor 150a is changed in OFF state, press belt 120 is located at front side angulation change position At (- 1.5mm).Become after OFF state (Figure 14 (i)) to make the sidesway backward of press belt 120 in band position sensor 150a Dynamic, CPU 10 sends instruction to stepper motor 155 makes it be rotated along CCW directions.
It for each pulse, is ordered by being sent to motor driver 180, CPU 10 makes stepper motor 155 along CCW directions It rotates (Figure 14, (i) to (ii)), until motor HP sensors 153 change into ON states.
If motor HP sensors 153 are not reacted in the predetermined period since rotation (such as in 0.5 second) (or keeping its OFF state), the then execution of imaging device 1 error similar with the S205 in Fig. 2 according to first embodiment stop. Error is stopped, imaging device 1 forbids fixing device 100 to operate, unless solving failure.
With reference to situation when motor HP sensors 153 are switched to ON states at (ii) in Figure 14, CPU 10 is to step It sends and instructs into motor 155.More specifically, CPU 10 makes it rotate up predetermined angular in CCW side to the transmission of stepper motor 155 The order of pulse (such as 100 pulses) and the order stopped after the rotation predetermined angular pulse of stepper motor 155.
Steering operation tilts jockey pulley 122, and press belt 120 is shifted to rear side.Therefore, press belt 120 is in rotation Laterally side offset (Figure 14, (iii) to (iv)) backward simultaneously.
After 120 spin for some time of press belt, press belt 120 is located at rear side angulation change position (+1.5mm) (Figure 14 (iv)).Band position sensor 150b is switched to OFF state from ON states.When band position sensor 150b is changed to locate When OFF state, CPU 10, which sends order, makes stepper motor 155 be rotated along CW directions so that press belt 120 is moved towards front side. In response to becoming OFF state or in response to making stepper motor 155 along CW directions from CPU 10 with position sensor 150b The order of rotation, timer 604 start time of measuring (Figure 14, (iv)).CPU 10 is used as being configured to export to be used to indicate turning The signal of the rotation amount of subelement 155a and the output unit of the signal of direction of rotation for being used to indicate rotor unit 155a.
For each pulse, CPU 10 sends order until motor HP sensors 153 are changed into motor driver 180 OFF state, and stepper motor 155 is made to be rotated (Figure 14, (iv) to (v)) along CW directions.604 measurement period of timer (iv) is extremely (v)。
If motor HP sensors 153 since rotation after predetermined period (such as 0.5 second) in do not react (or Keep its ON state), then imaging device 1 performs the error similar with the S205 in Fig. 2 according to first embodiment and stops.For going out Mistake stops, and imaging device 1 forbids fixing device 100 to operate, unless solving failure.
Become OFF state in response to (v) place motor HP sensors 153 in fig. 14, CPU 10 will be surveyed by timer 604 The period Z of amount is stored in the presumptive area in RAM 600.
Then, the execution of CPU 10 is used to determine whether to synchronize the program slightly lacked.It is described below to determine Whether the program that slightly lacks is synchronized.
With reference to situation when motor HP sensors 153 are switched to OFF state at (v) in Figure 14, CPU 10 is to step It sends and instructs into motor 155.More specifically, CPU 10 makes it rotate up predetermined angular in CW side to the transmission of stepper motor 155 The order of pulse (such as 100 pulses) and the order stopped after the rotation predetermined angular pulse of stepper motor 155.
Steering operation tilts jockey pulley 122, and press belt 120 is shifted to front side.Therefore, press belt 120 is in rotation Laterally side offset (Figure 14, (vi) to (vii)) forward simultaneously.
By repeating the flow, CPU 10 performs press belt 120 and moves back and forth control.
604 duplicate measurements of the timer period corresponding with the period (iv) to (v) in Figure 14 in steering operation is repeated. For example, the period of (ix) to the period of (x) and Figure 14 in (xv) to (xvi) can be measured in Figure 14.
Synchronize the detection program slightly lacked
Because the period Z measured by using the timer 604 with reference to Fig. 3 according to first embodiment is instead of counter C's Value X is it will be appreciated that for synchronizing the determining program slightly lacked, so the datail description of any repetition will be omitted.Namely It says, CPU 10 calculates the period Z measured by timer 604 the period Z measured by timer 604 and last time0Between variable quantity △ Z (△ Z=| Z-Z0|), and determine whether variable quantity △ Z are more than threshold value.
If variable quantity △ Z are more than threshold value, CPU (notification unit) 10 determines that synchronizing slight missing has occurred and that and lead to Know and mistake has occurred.
Failure notification can perform in the same manner as in the first embodiment.Slight missing, CPU are synchronized even if having occurred and that 10 do not stop the operation of imaging device 1 yet.In other words, the rotation of press belt 120 does not stop in fixing device 100.Change sentence It talks about, the CPU 10 as motor control unit controls drive motor 603 that press belt 120 is kept to rotate.
The construction of the embodiment can also provide the effect identical with first to fourth embodiment.
The other configurations related with the 5th embodiment
The period Z measured in the period Z and last time measured by timer 604 by timer 604 has been described0Between Variable quantity △ Z be more than threshold value in the case of CPU 10 determine to synchronize slight missing, can alternatively apply following construction.
If for example, by timing in the period Z and a series of the first steering operation of steering operations that are measured by timer 604 The period Z that device 604 measures0Between variable quantity △ Z be more than threshold value, it is possible to determine to synchronize slight missing.For example, referring to figure 14, the period in (iv) to the period in (v) and (xv) to (xvi) can be compared.In order to determine period Z0, can be in press belt 120 start rotation, and execution is for making the processing of the operation of stepper motor 155 before, so as to which the average value of multiple operations is determined For Z0。
604 measurement period of timer, example in the case where stepper motor 155 is rotated up in CW side is described above Such as, timer 604 can measure the period that stepper motor 155 is rotated up in CCW side.More specifically, timer 604 can be surveyed Amount and (i) in Figure 14 to (ii) corresponding period.In such a case, it is possible between the period with identical direction of rotation It obtains variation delta Z or variation delta Z can be obtained between the period with different rotary direction.
It has been described and determines whether variation delta Z is more than threshold value according to this embodiment, if 604 measurement period of timer The absolute value of Z is more than threshold value, then CPU 10 can determine to synchronize slight missing.In this case, the threshold value of period Z is set For the threshold value for the stopping that malfunctioning being shorter than in S204, S205 of Fig. 2 according to first embodiment (such as in 0.5 second).
Sixth embodiment
According to the first to the 5th embodiment, it has been directed to move back and forth the control of band, steering operation and synchronize light The determining of degree missing describes the control of the reciprocating movement to press belt 120.The embodiment of the present invention can be applied to heating tape 130。
In other words, for press belt 120 be illustratively described for make band reciprocating movement control, steering operation with And to synchronize slightly lack be determined to be suitable for form the heating rotating member of fixing nip part N and pressure rotating member At least one of include the situation of endless belt.
About will move back and forth the control of band, steering operation and synchronizing slightly lacks determines to be applied to heating tape 130 Detailed description will omit.According to the first to the 5th embodiment, press belt 120 can be substituted by heating tape 130 with understand about It moves back and forth the control of band, steering operation and synchronizes the determining applicability of slight missing.
For example, as the first to the 5th embodiment, in heating rotating member and the both band rotations of pressure rotating member In the case of turning component, the control of band is moved back and forth, steering operation and synchronizing slightly lacks determining can be applied to heating In 120 the two of band 130 and press belt.
Have been described (such as according to first to the 5th embodiment) formed fixing nip part N heating rotating member and Pressure rotating member both band rotating member (heating tape 130 and press belt 120), but can one of them be band rotation Component.
For example, as shown in figure 16, heating rotating member can be heating roller (rotating member) 510, and pressure rotates structure Part can be the press belt 520 as endless belt rotating member.Heating roller 510 can be for example hollow metal roller, and at it Can have elastic layer and separating layer in superficial layer.Heating roller 510 can include the heater for being configured to heating roller 510 512.Press belt 520 is arranged so that the pressure roller 522 of the part as fixing nip part N and is configured to pressure With the jockey pulley 523 of 520 application tension, the two rollers can be circular rotating.Press belt 520 is included as fixing nip portion Divide the gripper pad 524 of a part of N.Jockey pulley 523 is also used as the slewing rollers for performing steering operation.
While the invention has been described with reference to exemplary embodiments, it should be appreciated that, the present invention is not limited to disclosed Exemplary embodiment.Scope of the appended claims should be endowed broadest explanation to cover all such modifications and wait Same structure and function.

Claims (21)

1. a kind of imaging device, including：
Imaging unit is configured to form toner image on the recording medium；
Rotating member；
The band rotating member of annular, being configured to cooperate with the rotating member to form that be configured to will be by the imaging unit shape Into the toner image to the recording medium retained part；
First roller and the second roller are configured to rotatably support the band rotating member；
Stepper motor；
Transfer unit is driven, is configured to the driving of the stepper motor being transmitted to first roller so that first roller It tilts；
Output unit is configured to export the rotation amount signal for the rotation amount for indicating the rotor in the stepper motor；
Current control unit is configured to be fed into control based on the rotation amount signal exported from the output unit The electric current of coil in the stepper motor；
Measuring unit is configured to count the rotation amount indicated by the output unit；
Detection unit is configured to the position of the first roller of detection；With
Notification unit is configured to output based on the detection unit and pre- to provide by the value that the measuring unit counts Fixed notice, the notification unit provide the confirmation of the reservation in the state of imaging is able to carry out.
2. imaging device as described in claim 1,
Wherein described confirmation of the reservation be with the rotating member and the relevant mistake of the fixation unit with rotating member Notice.
3. imaging device as described in claim 1,
Wherein described confirmation of the reservation be with for tilting the notice of the relevant mistake of operation of first roller.
4. imaging device according to claim 1,
Wherein described confirmation of the reservation is the notice of the relevant mistake of missing synchronous with stepper motor.
5. imaging device as described in claim 1,
Wherein, the output unit exports the rotation amount signal and indicates the direction of rotation letter of the direction of rotation of the rotor Number, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, the state that the rotor is located at precalculated position from first roller rotates along the first direction of rotation Predetermined rotation amount；
In second period, the rotor is moved in the first period by the driving of stepper motor from making first roller Position along opposite with the first direction of rotation the second direction of rotation rotation, until detection unit detects that first roller is located at The precalculated position；
In the third period, the rotor is further rotated along the second direction of rotation；And
In the 4th period, the rotor is rotated in a first direction, until first roller is located at precalculated position；
Wherein, the current control unit is based on the rotation amount signal and the direction of rotation exported from the output unit Signal will be supplied to the electric current of the coil to control；
Wherein, the measuring unit at least counts the rotation amount indicated by the output unit in second period Number；And
Wherein, when the variable quantity of the value counted when the measuring unit is more than threshold value, the notification unit provides described predetermined Notice.
6. imaging device according to claim 1,
Wherein, the output unit exports the rotation amount signal and indicates the direction of rotation letter of the direction of rotation of the rotor Number, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, detect that first roller is located at precalculated position, the rotor in response to the detection unit Predetermined rotation amount is rotated in the first rotational direction；
In second period, the rotor is moved from first roller in the first period by the driving of stepper motor Position along opposite with the first direction of rotation the second direction of rotation rotation, until detection unit detects that first roller is located at Precalculated position；
In the third period, detect that first roller is located at the pre-position, institute in response to the detection unit It states rotor and rotates predetermined rotation amount on second direction of rotation；And
In the 4th period, the rotor from first roller in the third period by the driving of the stepper motor and Mobile position rotates along the first direction of rotation, until detection unit detects that first roller is located at the pre-position；
Wherein, the measuring unit counts the rotation amount indicated by the output unit at least in second period；And And
Wherein, when the variable quantity of the value counted when the measuring unit is more than threshold value, the notification unit provides described predetermined Notice.
7. imaging device according to claim 1,
Wherein, the output unit exports the rotation amount signal and indicates the direction of rotation letter of the direction of rotation of the rotor Number, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, the state that the rotor is located at precalculated position from first roller rotates along the first direction of rotation Predetermined rotation amount；
In second period, the rotor from first roller in the first period by the driving of stepper motor and movement Position is rotated along the second direction of rotation opposite with the first direction of rotation, until detection unit detects that first roller is located in advance Positioning is put；
In the third period, the rotor is further rotated along the second direction of rotation；And
In the 4th period, the rotor is rotated in a first direction, until first roller is located at precalculated position；
Wherein, the current control unit is based on the rotation amount signal and the direction of rotation exported from the output unit Signal will be supplied to the electric current of the coil to control；
Wherein, the measuring unit at least counts the rotation amount indicated by the output unit in second period Number；And
Wherein, when the value counted by measuring unit is more than threshold value, notification unit provides scheduled notice.
8. imaging device according to claim 1,
Wherein, the output unit exports the rotation amount signal and indicates the direction of rotation letter of the direction of rotation of the rotor Number, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, detect that first roller is located at precalculated position, the rotor in response to the detection unit Predetermined rotation amount is rotated in the first rotational direction；
In second period, the rotor from first roller in the first period by the driving of stepper motor and movement Position is rotated along the second direction of rotation opposite with the first direction of rotation, until detection unit detects that first roller is located in advance Positioning is put；
In the third period, detect that first roller is located at the precalculated position in response to the detection unit, it is described Rotor rotates predetermined rotation amount on second direction of rotation；And
In the 4th period, the rotor from first roller in the third period by the driving of the stepper motor and Mobile position rotates along the first direction of rotation, until detection unit detects that first roller is located at the pre-position；
Wherein, the measuring unit at least counts the rotation amount indicated by the output unit in second period Number；And
Wherein, when the value counted by measuring unit is more than threshold value, notification unit provides the confirmation of the reservation.
9. imaging device according to claim 1, further includes：
Band detection unit, is configured to detect and is upwardly deviated from presumptive area in horizontal with rotating member with rotating member,
Wherein, based on the output with detection unit, the output unit exports direction of rotation signal, so that first roller It is tilted enabling described returned on the direction of the presumptive area with rotating member.
10. imaging device according to claim 1, further includes：
Forbid unit, be configured to have passed through at the time of rotating since the output unit indicates the rotor predetermined The detection unit is not detected in the case that first roller is located at precalculated position and forbids performing at the imaging after time Reason.
11. imaging device according to claim 1, further includes：
Rotation control unit is configured to control the rotation with rotating member；
Wherein, the rotation control unit makes the band rotation structure in the case where the notification unit provides the confirmation of the reservation Part keeps rotation.
12. a kind of imaging device, including：
Imaging unit is configured to form toner image on the recording medium；
Rotating member；
The band rotating member of annular, being configured to cooperate with the rotating member to form that be configured to will be by the imaging unit shape Into the toner image to the recording medium retained part；
First roller and the second roller are configured to rotatably support the band rotating member；
Stepper motor；
Transfer unit is driven, is configured to the driving of the stepper motor being transmitted to first roller so that first roller It tilts；
Detection unit is configured to the position of the first roller of detection；With
Output unit is configured to export rotation amount signal and the instruction of the rotation amount for indicating the rotor in the stepper motor The direction of rotation signal of the direction of rotation of the rotor, wherein, the output unit exports the rotation amount signal and rotation side To signal, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, the state that the rotor is located at precalculated position from first roller rotates along the first direction of rotation Predetermined rotation amount；
In second period, the rotor from first roller in the first period by the driving of stepper motor and movement Position is rotated along the second direction of rotation opposite with the first direction of rotation, until detection unit detects that first roller is located in advance Positioning is put；
In the third period, the rotor is further rotated along the second direction of rotation；And
In the 4th period, the rotor is rotated in a first direction, until first roller is located at precalculated position；
Current control unit, be configured to based on the rotation amount signal and direction of rotation signal exported from the output unit come Control will be fed into the electric current of the coil in the stepper motor；
Measuring unit is configured to measure at the time of being rotated in a second direction in the second period from output unit instruction to inspection Survey unit detects period at the time of the first roller is located at precalculated position；With
Notification unit is configured to the period measured based on the measuring unit to provide confirmation of the reservation, the notification unit The confirmation of the reservation is provided in the state of imaging is able to carry out.
13. imaging device as claimed in claim 12,
Wherein, when the period measured by measuring unit being more than predetermined period, the notification unit provides the confirmation of the reservation.
14. imaging device according to claim 12,
Wherein, when the variable quantity of the period measured by the measuring unit is more than threshold value, the notification unit provides described pre- Fixed notice.
15. imaging device according to claim 12,
Wherein described confirmation of the reservation be with the rotating member and the relevant mistake of the fixation unit with rotating member Notice.
16. imaging device according to claim 12,
Wherein described confirmation of the reservation be with for tilting the notice of the relevant mistake of operation of first roller.
17. imaging device according to claim 12,
Wherein described confirmation of the reservation is the notice of the relevant mistake of missing synchronous with stepper motor.
18. imaging device according to claim 12,
Wherein, the output unit exports the rotation amount signal and indicates the direction of rotation letter of the direction of rotation of the rotor Number, enabling the first period, the second period, third period and the 4th period are sequentially repeated,
In first period, detect that first roller is located at precalculated position, the rotor in response to the detection unit Predetermined rotation amount is rotated in the first rotational direction；
In second period, the rotor is moved from first roller in the first period by the driving of stepper motor Position along opposite with the first direction of rotation the second direction of rotation rotation, until detection unit detects that first roller is located at Precalculated position；
In the third period, detect that first roller is located at the pre-position, institute in response to the detection unit It states rotor and rotates predetermined rotation amount on second direction of rotation；And
In the 4th period, the rotor from first roller in the third period by the driving of the stepper motor and Mobile position rotates along the first direction of rotation, until detection unit detects that first roller is located at the pre-position.
19. imaging device according to claim 12, further includes：
Band detection unit, is configured to detect and is upwardly deviated from presumptive area in horizontal with rotating member with rotating member,
Wherein, based on the output with detection unit, the output unit exports direction of rotation signal, so that first roller It is tilted enabling described returned on the direction of the presumptive area with rotating member.
20. imaging device as claimed in claim 12, further includes：
Forbid unit, be configured to have passed through at the time of rotating since the output unit indicates the rotor predetermined The detection unit is not detected in the case that first roller is located at precalculated position and forbids performing at the imaging after time Reason.
21. imaging device according to claim 12, further includes：
Rotation control unit is configured to control the rotation with rotating member；
Wherein, the rotation control unit makes the band rotation structure in the case where the notification unit provides the confirmation of the reservation Part keeps rotation.
CN201711323800.7A 2016-12-13 2017-12-13 Imaging device Pending CN108227441A (en)

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JP2020013051A (en) 2018-07-20 2020-01-23 エイチピー プリンティング コリア カンパニー リミテッドＨＰ Ｐｒｉｎｔｉｎｇ Ｋｏｒｅａ Ｃｏ．， Ｌｔｄ． Image forming system

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Application publication date: 20180629