CN108689193A - Image forming apparatus, paper type determination method and recording medium - Google Patents
Image forming apparatus, paper type determination method and recording medium Download PDFInfo
- Publication number
- CN108689193A CN108689193A CN201810308512.2A CN201810308512A CN108689193A CN 108689193 A CN108689193 A CN 108689193A CN 201810308512 A CN201810308512 A CN 201810308512A CN 108689193 A CN108689193 A CN 108689193A
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- Prior art keywords
- paper
- pushing force
- forming apparatus
- image forming
- gate part
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/06—Movable stops or gauges, e.g. rising and falling front stops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/36—Article guides or smoothers, e.g. movable in operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Controlling Sheets Or Webs (AREA)
- Registering Or Overturning Sheets (AREA)
- Control Or Security For Electrophotography (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
The present invention relates to image forming apparatus, paper type determination method and recording mediums.A kind of image forming apparatus etc. is provided, it can be by carrying out skew corrected for judging the component of paper type with easy structure and paper type judges to being arranged for carrying out the component of skew corrected.Have:Multiple gate parts (210a, 210b), are set to the main scanning direction of paper, stop to carry out the paper that skew corrected makes conveying;Detection unit (220,250) is abutted, each gate part, the abutting of detection paper (P) are respectively arranged in;Pushing force detection unit (211,240,250) is set at least one of multiple gate parts, detects pushing force when paper feeding;And paper type judging unit (300), paper type is judged according to the pushing force detected by pushing force detection unit.
Description
Technical field
The present invention relates to for example as the MFP of multifunctional digital compounding machine (Multi Function Peripherals:It is more
Function and service machine) etc. image forming apparatuses, the paper type determination method that is executed by the device and recording medium.
Background technology
In image forming apparatus as described above, when the paper types difference such as paper sheet thickness of print paper, image
Optimal process conditions when formation are also different, and therefore, it is desirable to judge the paper type of paper and changed according to judgement result
Process conditions.
Conventionally, there is known following image forming apparatus (such as patent document 1):By the way that multiple paper gate parts are arranged
And it is inclined crooked as paper to correct so that the paper of conveying is abutted to these multiple gate parts.But in patent text
Which kind of offer in the technology described in 1, whether paper type, the amount of movement of door is all identical, therefore can not judge paper type.
Therefore patent document 2 proposes following image forming apparatus:When paper by register roller to stopping pressing
When curved, the sensor axis of load sensor is pushed into the ring portion of paper, from the push the amount of load sensor output and sensor axis
Corresponding voltage judges paper sheet thickness according to the output voltage values.
Patent document 1:Japanese Unexamined Patent Publication 2013-154979 bulletins
Patent document 2:Japanese Unexamined Patent Publication 2007-144666 bulletins
Invention content
However, in image forming apparatus described in patent document 2, the paper sheet delivery before individually being formed to image is needed
The component for carrying out skew corrected and the component for detecting paper type is arranged in portion, exist cause it is constructively complex as well as expensive this
The project of sample.
The present invention makes to solve this project, and project is to provide one kind can be by being used to carry out
The component setting of skew corrected is for judging that the component of paper type to carry out skew corrected and paper type with easy structure
The image forming apparatus of judgement, the paper type determination method executed by the device and recording medium.
The above subject is solved by unit below.
(1) a kind of image forming apparatus, which is characterized in that have:Multiple gate parts, are set to the main scanning side of paper
To in order to carry out the paper stopping that skew corrected makes conveying;Detection unit is abutted, each gate part is respectively arranged in, is detected
The abutting of paper;Pushing force detection unit is set at least one of the multiple gate part, detects pushing when paper feeding
Power;And paper type judging unit, paper type is judged according to the pushing force detected by the pushing force detection unit.
(2) image forming apparatus according to preceding paragraph 1, which is characterized in that paper is being detected by the abutting detection unit
After the abutting opened, keeps the abutting state of paper and the detection of pushing force is carried out by the pushing force detection unit, pushing away
Paper is set to pass through gate part after the detection of pressure.
(3) image forming apparatus according to preceding paragraph 1 or 2, which is characterized in that the paper type judging unit from by
The multiple detection unit that abuts all detects that paper abuts to the inspection of the timing progress pushing force of the gate part
It surveys and paper type judges.
(4) image forming apparatus according to any one of preceding paragraph 1~3, which is characterized in that the pushing force detection
Unit according to due to the abutting to the gate part and caused by the amount of movement of gate part detect pushing force when paper feeding.
(5) image forming apparatus according to preceding paragraph 4, which is characterized in that the gate part has to abut in paper
When limit paper sheet delivery defined gate retentivity, which is that paper abuts to gate part and skew corrected knot
The 2nd gate retentivity until the pushing force of paper is detected after the 1st gate retentivity and skew corrected until beam.
(6) image forming apparatus according to preceding paragraph 5, which is characterized in that the 1st retentivity is pushing away using paper
Pressure cannot make the retentivity that gate part moves.
(7) image forming apparatus according to preceding paragraph 5, which is characterized in that the 2nd retentivity be with according to gate portion
The amount of movement of part and the corresponding retentivity of load changed.
(8) image forming apparatus according to any one of preceding paragraph 4~7, which is characterized in that be also equipped with image starting
Describe position setup unit, image starting describes position setup unit and carries out paper according to by the pushing force detection unit
The amount of movement of gate part when type judges describes position to set the starting of image.
(9) image forming apparatus according to any one of preceding paragraph 4~8, which is characterized in that the gate part
Amount of movement based on the step-by-step counting of optical sensor and slit component by being calculated.
(10) image forming apparatus according to any one of preceding paragraph 1~9, which is characterized in that examined by the abutting
The abutting detection for surveying the paper that unit carries out is carried out by electrostatic transducer.
(11) image forming apparatus according to any one of preceding paragraph 1~10, which is characterized in that the pushing force inspection
It surveys unit and pushing force is detected according to the amount of pressure for the paper for abutting to gate part.
(12) image forming apparatus according to preceding paragraph 11, which is characterized in that the paper type judging unit according to
The amount of pressure at least two positions detected by the pushing force detection unit differentiates paper type.
(13) image forming apparatus according to preceding paragraph 11 or 12, which is characterized in that the amount of pressure passes through piezoelectricity
Sensor measures.
(14) image forming apparatus according to any one of preceding paragraph 1~13, which is characterized in that by the multiple
After arbitrary abutting detection unit in abutting detection unit detects abutting at first, exists and be not detected at the appointed time
In the case of the abutting detection unit of abutting, the stopping for the paper implemented by the gate part is released.
(15) image forming apparatus according to preceding paragraph 14, which is characterized in that relieving by gate part reality
In the case of the stopping for the paper applied, the paper type judging unit will judge immediately in the paper type of the paper of preceding judgement
To stop the paper type for the paper being released from.
(16) image forming apparatus according to any one of preceding paragraph 1~15, which is characterized in that by the paper
After type decision unit carries out the judgement of paper type, process conditions when image is formed are set according to judgement result.
(17) image forming apparatus according to preceding paragraph 16, which is characterized in that the process conditions are transfer output.
(18) image forming apparatus according to preceding paragraph 16, which is characterized in that the process conditions are that paper separation is defeated
Go out.
(19) image forming apparatus according to preceding paragraph 16, which is characterized in that the process conditions are fixing temperatures.
(20) a kind of paper type determination method, which is characterized in that image forming apparatus executes following steps:By being set to
Multiple gate parts of the main scanning direction of paper in order to carry out skew corrected make conveying come paper stop the step of;By respectively
The step of being installed on abutting of the abutting detection unit of each gate part to detect paper;By being set to the multiple gate part
At least one of pushing force detection unit come the step of detecting pushing force when paper feeding;And according to by detection pushing force
The pushing force that step detects judges the paper type determination step of paper type.
(21) a kind of computer-readable recording medium, is stored with paper type decision procedure, which judges journey
Sequence makes the computer of image forming apparatus execute following steps:Multiple gate parts by the main scanning direction for being set to paper are
Carry out the step of paper that skew corrected makes conveying stops;By be respectively arranged in the abutting detection unit of each gate part Lai
The step of detecting the abutting of paper;It is examined by being set to the pushing force detection unit of at least one of the multiple gate part
The step of surveying pushing force when paper feeding;And paper type is judged according to the pushing force detected by the step of detection pushing force
Paper type determination step.
According to the invention described in preceding paragraph (1), to being set to the main scanning direction of paper, making conveying to carry out skew corrected
Multiple gate parts that the paper come stops are separately installed with multiple abutting detection units of the abutting of detection paper, therefore can
The skew corrected of paper is carried out by gate part.In addition, being provided with pushing force at least one of multiple gate parts
Detection unit, the pushing force detection unit detect the pushing force when paper feeding for judging paper type, therefore need not be independent
Gate part and pushing force detection unit, realization, which is arranged, in ground to be sentenced to carry out skew corrected and paper type with easy structure
Fixed image forming apparatus.
Invention according to preceding paragraph (2) keeps paper after detecting the abutting of paper by abutting detection unit
Abutting state and the detection that pushing force is carried out by pushing force detection unit, make paper pass through gate after the detection of pushing force
Component.
According to the invention described in preceding paragraph (3), paper type judging unit is all detected from by multiple abutting detection units
Go out paper and abut to the timing of gate part to act the detection for carrying out pushing force and paper type judgement, therefore can be with crooked
The judgement of paper type is accurately proceed to the state of correction.
According to the invention described in preceding paragraph (4), pushing force detection unit according to due to the abutting to gate part and caused by
The amount of movement of gate part detects pushing force when paper feeding, therefore can detect pushing when paper feeding with easy structure
Power.
According to the invention described in preceding paragraph (5), gate part abuts to gate part and crooked when paper abuts, in paper
Correction with the 1st gate retentivity limits paper sheet delivery until terminating, until the pushing force that paper is detected after skew corrected
Paper sheet delivery is limited with the 2nd gate retentivity.
According to the invention described in preceding paragraph (6), gate part is until paper abuts to gate part and skew corrected terminates
Paper sheet delivery is limited so that the retentivity that gate part moves cannot be made using the pushing force of paper.
According to the invention described in preceding paragraph (7), until the pushing force that gate part detects paper after skew corrected with
The corresponding retentivity of load (effect) that is changed according to the amount of movement of gate part limits paper sheet delivery.
According to the invention described in preceding paragraph (8), gate part when paper type judgement is carried out according to pushing force detection unit
Amount of movement come set image starting describe position, therefore can correct gate part movement caused by image starting describe
The departure of position, can position is described in identical starting since with being detected without pushing force the case where describe image.
According to the invention described in preceding paragraph (9), the amount of movement of gate part can be by being based on optical sensor and slit portion
The step-by-step counting of part accurately calculates.
According to the invention described in preceding paragraph (10), the abutting detection of the paper carried out by abutting detection unit is sensed by electrostatic
Device carries out, therefore can reliably detect the abutting of paper with easy structure.
According to the invention described in preceding paragraph (11), pushing force detection unit is according to the amount of pressure of the paper for abutting to gate part
It detects pushing force, therefore can relatively easily detect pushing force when paper feeding.
According to the invention described in preceding paragraph (12), paper type judging unit according to by pushing force detection unit detect to
The amount of pressure at few two positions differentiates paper type, thus can mitigate amount of pressure partial deviations carry out high-precision paper
Open type decision.
According to the invention described in preceding paragraph (13), can amount of pressure reliably be measured by piezoelectric transducer.
According to the invention described in preceding paragraph (14), examined at first by the arbitrary abutting detection unit in multiple abutting detection units
After measuring abutting, in the case of there is the abutting detection unit that abutting is not detected at the appointed time, being judged as can not
Skew corrected is carried out, the stopping for the paper implemented by gate part is released.
It, will in the case where relieving the stopping for the paper implemented by gate part according to the invention described in preceding paragraph (15)
The paper type of paper for being judged to stopping being released from immediately in the paper type of the paper of preceding judgement, therefore can avoid and not having
The presence for providing the paper of paper type, image formation processing after capable of being smoothly performed etc..
It is pressed after the judgement for carrying out paper type by paper type judging unit according to the invention described in preceding paragraph (16)
Process conditions when image formation are set according to judgement result, therefore can be with appropriate process conditions corresponding with paper type
It is formed to carry out image.
According to the invention described in preceding paragraph (17), can be exported with appropriate transfer corresponding with paper type to be turned
Print.
According to the invention described in preceding paragraph (18), output can be detached with appropriate paper corresponding with paper type to carry out
The separation of paper.
According to the invention described in preceding paragraph (19), can be determined with appropriate fixing temperature corresponding with paper type
Shadow.
According to the invention described in preceding paragraph (20), paper can be carried out by detecting the abutting of paper by abutting detection unit
Skew corrected, and gate part and pushing force detection unit need not be separately provided, can be come with easy structure into
Row skew corrected and paper type detection.
According to the invention described in preceding paragraph (21), the computer of image forming apparatus can be made to execute following steps:By being arranged
In the main scanning direction of paper multiple gate parts in order to carry out skew corrected make conveying come paper stop the step of;By dividing
The step of not being installed on abutting of the multiple abutting detection units of multiple gate parts to detect paper;By being set to multiple gates
The pushing force detection unit of at least one of component is come the step of detecting pushing force when paper feeding;And it is pushed according to by detection
The pushing force that the step of power detects judges the paper type determination step of paper type.
Description of the drawings
Fig. 1 is the overall structure figure of the image forming apparatus of an embodiment of the invention.
Fig. 2 is the figure for the details for indicating skew corrected/paper type detection unit.
(A) of Fig. 3~(C) is the sectional view for the state that paper is transported to skew corrected/pushing force detection unit.
Fig. 4 is to indicate to carry out paper type judgement using Fig. 2 and skew corrected shown in Fig. 3/pushing force detection unit
In the case of image forming apparatus action flow chart.
(A) of Fig. 5~(C) indicates other embodiments of the present invention, is that paper is transported to skew corrected/pushing force inspection
Survey the sectional view of the state of unit.
Fig. 6 is indicated using skew corrected shown in fig. 5/pushing force detection unit come the case where carrying out paper type judgement
Under image forming apparatus action flow chart.
Fig. 7 is indicated using skew corrected shown in fig. 5/pushing force detection unit come the case where carrying out paper type judgement
Under image forming apparatus other actions flow chart.
Reference sign
1:Image forming apparatus;200:Skew corrected/pushing force detection unit;201:Conveying roller;202,203:Register tune
Save roller;210a,210b:Gate part;211:Slit component;220:Abut sensor;230:Stop dog part;231:Control
Bar;232:Spring members;240:Optical sensor;250:Piezoelectric transducer;300:Control unit;301:CPU;302:ROM;401:
Photosensitive drums;405:Transfer roll;500:Fuser;P:Paper.
Specific implementation mode
Illustrate embodiments of the present invention below according to attached drawing.
Fig. 1 is the overall structure figure of the image forming apparatus 1 of an embodiment of the invention.
Image forming apparatus 1 have receiving paper one or more give carton 100.From extracted to carton 100
Paper is transported to along transport path 700 upward by being configured at the conveying roller of the specified position of transport path 700
Side.
Skew corrected/pushing force detection unit is configured near the middle position of the upper and lower directions of transport path 700
200, the skew corrected/pushing force detection unit 200 is used to carry out the inclined skew corrected and paper pushing force as paper
Detection.Skew corrected/pushing force detection unit 200 have clip transport path 700 configuration a pair of of register roller 202,
203 and the upstream side (downside) of register roller 202,203 clip transport path 700 configuration a pair of of conveying roller 201,201.
About skew corrected/details will be described later for pushing force detection unit 200.
Has the image shape for forming image on paper in the downstream side of skew corrected/pushing force detection unit 200
At portion.Specifically, being provided with rotatable photosensitive drums 401, the rotation around photosensitive drums 401 is configured in order makes photosensitive drums
The charged roller 402 of 401 electrifications, by exposing unit 403 that the photosensitive drums 401 of electrification are exposed according to image data, make it is photosensitive
The surface development of drum 401 forms the developer 404 of toner image, the toner image of formation is transferred to the transfer of paper
The cleaner 406 etc. that the surface of photosensitive drums 401 is de-energized after roller 405 and transfer.
Transferred by transfer roll 405 toner image paper be fixed device 500 fixing after be discharged to paper discharge list
Member 600.Fuser 500 has heating roller 501 and pressure roller 502, is carried out by being heated, being pressurizeed to paper by two rollers
Fixing.
Including the molar behavior of the image forming apparatus 1 of image formation action etc. is controlled by control unit 300.Control unit
300 have CPU 301, the ROM 302 of the operation program etc. for preserving CPU 301 and operation area when being acted as CPU 301
The RAM 303 in domain executes each processing by making CPU 301 be acted according to operation program.
Fig. 2 is the figure for the details for indicating skew corrected/pushing force detection unit 200, and it is askew that Fig. 3 is that paper is transported to
The sectional view of the state of oblique correction/pushing force detection unit 200.
As described above, the skew corrected/pushing force detection unit 200 has a pair of of register roller 202,203 and conveying
Roller 201,201.
Register roller 202,203 is by the drive shaft 202a and driven shaft 202b that are configured with horizontality (shown in Fig. 3)
The multiple rollers supported spacedly are constituted, and make drive shaft 202a rotations driving by driving portion (not shown) to make a set
Quasi- regulating roller 202 rotates, and along with the rotation of register roller 202, another register roller 203 is around driven shaft 203a rotations
Turn.In addition, conveying roller 201,201 is by by the spaced multiple roller structures that support of ground of each axle portion 201a for being configured with horizontality
At an axis 202a rotates driving by driving portion (not shown), and pushing force when aftermentioned paper type is judged assigns
To paper P.
Register roller 202,203 play the action with image forming part timing matchingly provide by conveying roller 201,
The effect of the 201 paper P come in X-direction (upper direction) conveying, but in this embodiment, bitten register tune in paper P
The skew corrected of paper is carried out before saving roller 202,203.
That is, add up between several adjacent register rollers in multiple register rollers 202,203 be provided with it is multiple
(being in this example embodiment two) gate part 210a, 210b, in paper P by paper P before biting register roller 202,203
Front end abuts to the end of gate part 210a, 210b.In the upstream side of the sheet transport direction of each gate part 210a, 210b
End be respectively arranged with detection paper P abutting abutting sensor 220.Have as abutting sensor 220, such as by basis
The variation of electrostatic capacitance is constituted to detect the electrostatic transducer of abutting state when no paper.
Each gate part 210a, 210b be separately rotatablely arranged at the register roller 203 of slave end from
Moving axis 203a.In addition, in the rotation direction of gate part 210a, 210b, gate part 210a, 210b's abuts biography with configuration
The end of the different side in end of sensor 220 is connected respectively control-rod 231, and the other end of control-rod 231 is locked to
Stop dog part 230.
In addition, each control-rod 231 is endowed always by spring members 232 to the sides each gate part 210a, 210b respectively
The thrust in the direction of pushing.The thrust of the spring members 232 is transmitted via control-rod 231 to gate part 210a, 210b, each lock
Door part 210a, 210b be endowed always to Fig. 3 counter clockwise direction, in other words, abut sensor 220 to be pushed to paper defeated
Send thrust as the upstream side in direction.In addition, when conveying paper P after skew corrected, each gate part 210a, 210b pass through paper
The pushing force of P come resist thrust so as to Fig. 3 rotationally clockwise.
Stop dog part 230 is coupled with support device (not shown), which can fix or support with discharging
The stop dog part 230.In this embodiment, each stop dog part 250 is stationary state until skew corrected terminates,
It is directed to gate part 210a, 210b as a result, the retentivity that cannot be moved it using the pushing force of paper P is imparted to gate portion
Part 210a, 210b release the fixation of stop dog part 230, can pass through the pushing force of paper P after skew corrected terminates
To make each gate part 210a, 210b rotate.When each gate part 210a, 210b rotate fixed amount, control-rod 231 is to stop
The locking of device component 230 can be detached from.
(A) of Fig. 3 indicates that the front end of paper P abuts to the standby mode for abutting sensor 220, gate part not yet
The bearing surface of the abutting sensor 220 of the end of 210a, 210b is located at driving register roller 202 and driven register roller
The sheet transport direction upstream side of 203 nip portion, the front end of paper P before protruding into above-mentioned nip portion with above-mentioned bearing surface
It abuts.In this state, each gate part 210a, 210b are stopped device component 230 and prevent rotation.Thus, at (A) of such as Fig. 2
Such paper P diagonals and in the case of coming, the front end of paper P first abuts to a side of gate part 210a, 210b, but does not have
Another gate part is abutted to, therefore the advanced side of the diagonal of the front end of paper P waits for and falls behind side, to as shown in (B) of Fig. 2
Ground corrects the diagonal (crooked) of paper.
After skew corrected terminates, that is all abutting sensors 220 of gate part 210a, 210b detect
The fixation of stop dog part 230 is discharged when abutting (the becoming ON (connection)) of paper P.Thus as Fig. 3 (B) shown in, by with
Conveying roller 201 convey paper P be thus generation top of form pushing force, the up time of gate part 210a, 210b in Fig. 3
Needle direction rotate, later the front end of paper P protruded into while pushing gate part 210a, 210b register roller pair 202,
203 nip portion.
In this embodiment, after the paper P to being conveyed by diagonal carries out skew corrected, the front end of paper P charges into
To before nip portion, paper pushing force is detected according to the amount of movement of gate part 210a, 210b.
I.e. as shown in figure 3, be provided in the centre position of the rotation direction of each gate part 210a, 210b can be with gate
The slit component 211 that component 210a, 210b are integrally rotated.It is formed in rotation direction in the slit component 211 multiple
Slit is read by being configured at the optical sensor 240 that is made of light-emitting component and photo detector of both sides of slit component 211
Take the slit of slit component 211.Then, gate part is detected according to counted number of pulses corresponding with the quantity of slit when reading
The amount of spin of 210a, 210b.
More specifically, after skew corrected, as shown in (B) of Fig. 3, the fixation of stop dog part 230 is discharged to logical
The pushing force of paper P is crossed to make gate part 210a, 210b rotate.Gate part 210a, 210b by spring members 232 by
The thrust in the direction opposite with the pushing force of paper P is assigned, therefore gate part 210a, 210b have the pushing of confrontation paper P
The retentivity of power is rotated according to the push the amount of paper P while so that load (resistance) is changed.Paper sheet thickness is thicker, then
The pushing force of paper P is bigger, and pushing force is bigger, then the amount of spin of gate part 210a, 210b is bigger, and slit component 211 turns
Momentum is also bigger.It is counted by the quantity of the slit of 240 pairs of slit components corresponding with the amount of spin 211 of optical sensor,
To detect the pushing force of paper P.If it is required, then when the pushing force of detection paper P, can also be fixed by paper P conveyings
After amount, the driving of conveying roller 201 is stopped into the stipulated time until pushing force detection terminates.
After the pushing force of detection paper P, when paper P is transported to the nip portion of register roller 202,203, also
The carrying capacity for applying register roller 202,203, by the upper state for pushing away (C) for Fig. 3 of gate part 210a, 210b to convey
Paper P.Transported paper transfers toner image by transfer roll 405, is discharged to after being fixed by fixing device 500
Paper unit 600.
When paper P completely by skew corrected/pushing force detection unit 200 when, each gate part 210a, 210b pass through bullet
The thrust of spring component 232 is restored to the standby mode of (A) of Fig. 3.
In addition, being set as protecting come the fixed of each gate part 210a, 210b when carrying out skew corrected by stop dog part 230
Hold with the release after skew corrected, but can also be configured to:Directly relatedly with each gate part 210a, 210b, when crooked
Each gate part 210a, 210b are remained rotation blocked state by timing, in the rotation for detecting each gate part 210a, 210b
It will keep discharging when amount, so that each gate part 210a, 210b is fought the thrust of spring members 232 and is rotated, in detection
Make each gate part 210a, 210b forcibly along Fig. 3 rotationally clockwise to the state of (C) as Fig. 3 afterwards, in paper
P is opened by restoring later to the standby mode of (A) of Fig. 3 using the thrust of spring members 232.
Fig. 4 is to indicate to sentence to carry out paper type using Fig. 2 and skew corrected shown in Fig. 3/pushing force detection unit 200
The flow chart of the action of image forming apparatus 1 in the case of fixed.
In addition, action shown in flow chart later Fig. 4 and Fig. 6 is by the CPU 301 of control unit 300 according to being stored in
The operation program of ROM 302 etc. carries out action and is performed.
In step S01, judge whether the paper sheet delivery for having started conveying roller 201, if do not started to (in step S01
Middle "No"), then waiting for the start.In the case where having begun ("Yes" in step S01), fixed stop device in step s 12
Component 230 prevents each gate part 210a, 210b maintain the pushing force using paper P from making gate part 210a, 210b
Mobile retentivity (retentivity 1).
Then in step S03, judge whether to be supported by all of paper abutting part for being set to gate part 210a, 210b
Connect the abutting that sensor 220 detects paper P (whether all abutting sensors 220 are ON).If all abutting sensors 220
All it is not ON ("No" in step S03), then it is ON to wait until all abutting sensors 220 all.
If all abutting sensors 220 are all ON ("Yes" in step S03), it is judged as that skew corrected terminates, enters
To step S04, the fixation of stop dog part 230 is decontroled, each gate part 210a, 210b is made to keep based on spring members 232
The retentivity (retentivity 2) of thrust.The retentivity 2 be applied by spring members 232, with according to gate part 210a, 210b
Amount of movement (amount of spin) variation the corresponding retentivity of load, gate part 210a, 210b can pass through the pushing of paper P
Power rotates.
Then in step S05, gate part caused by the pushing force of paper P is detected in the state that paper P is abutted
After the amount of movement of 210a, 210b, paper type is judged according to amount of movement in step S06.Define amount of movement and paper
The table of the correspondence of type is pre-stored in the storage part (not shown) in image forming apparatus 1, using the table as base
Plinth is come the corresponding paper type of the amount of movement that judges be detected.In addition, the detection of amount of movement both can be in all gate portions
It is carried out in part 210a, 210b and testing result is averaged, the testing result of any one can also be used only.
Then in step S07, process conditions when image is formed are set according to the paper type being determined.As work
Skill condition is not defined, can enumerate it is following at least any one:Transfer output, paper point when transfer roll 405 transfers
From output, the fixing temperature of fuser 500.
In this embodiment, the pushing force of paper P is detected as the amount of movement of gate part 210a, 210b, and
The determination processing of paper type is carried out, therefore carries out paper P's immediately by register roller 202,203 with after skew corrected
The case where conveying, is compared, and the starting of image describes position and generates deviation on falling behind direction.Therefore, lock is corrected in step S08
The departure of the picture position of paper is transferred to caused by door part 210a, 210b movement, thus set with gate part 210a,
Position is described in the corresponding image starting of amount of movement of 210b.According to the correction, can be detected from the pushing force without paper P
The case where identical starting describe position and rise and start to describe image.
Then, paper is conveyed by register roller 202,203 in step S09.
Fig. 5 indicates other embodiments of the present invention, is sectional view corresponding with Fig. 3.In this embodiment, in gate
The paper abutting part of component 210a, 210b are provided with pressure sensor 250, carry out paper P's by the pressure sensor 250
The pushing force for abutting detection and paper P detects.
The embodiment of embodiment shown in fig. 5 as shown in figure 3 is compared, in addition to be not provided with gate part 210a,
Each abutting of the front end of this point of slit component 211, optical sensor 240 and replacement gate part 210a, 210b in 210b passes
Sensor 220 and being arranged other than piezoelectric transducer 250 this point has structure identical with the embodiment of Fig. 3, therefore to identical knot
Structure part adds identical label, omits detailed description.But the pushing force of the paper P carried out by piezoelectric transducer 250 is examined
Survey can also carry out under the rotation blocked state of gate part 210a, 210b, need not be after skew corrected to gate part
210a, 210b assign retentivity 2, therefore the thrust of spring members 232 can be weaker than the embodiment of Fig. 3.
(A) of Fig. 5 indicates that the front end of paper P abuts to the standby mode of piezoelectric transducer 250, gate part not yet
The bearing surface of the piezoelectric transducer 250 of the end of 210a, 210b is located at driving register roller 202 and driven register roller
The sheet transport direction upstream side of 203 nip portion, the front end of paper P before protruding into above-mentioned nip portion with above-mentioned bearing surface
It abuts.In this state, each gate part 210a, 210b are stopped device component 230 and prevent rotation.Thus, in paper P diagonals and
In the case of coming, the front end of paper P first abuts to any of gate part 210a, 210b, but does not abut to another
Gate part, therefore the inclined advanced side of the front end of paper P waits for and falls behind side, and school is obtained to the diagonal (crooked) of paper
Just.
After skew corrected terminates, that is all piezoelectric transducers 250 of gate part 210a, 210b all detect
When going out pushing force (the becoming ON) of paper P, the pushing force of paper P is measured by piezoelectric transducer 250.The thickness of paper is got over
Thickness, then bigger to the pushing force of pressure sensor 250, the output of pushing force more big then piezoelectric transducer 250 is also bigger.
Then when discharging the fixation of stop dog part 250, as shown in (B) of Fig. 5, the front end of paper P pushes lock on one side
Door part 210a, 210b protrude into the nip portion of register roller pair 202,203 on one side, also apply register roller 202,203
Carrying capacity, the upper state for pushing away (C) for Fig. 5 of gate part 210a, 210b is conveyed into paper P.Transported paper passes through
Transfer roll 405 is transferred toner image, after being fixed by fixing device 500, is discharged to paper feeder unit 600.
When paper P completely by skew corrected/pushing force detection unit 200 when, each gate part 210a, 210b pass through bullet
Standby mode shown in (A) of the thrust of spring component 232 to Fig. 3 restores.
Fig. 6 indicates to carry out paper type judgement using skew corrected shown in fig. 5/pushing force detection unit 200
In the case of image forming apparatus 1 action flow chart.
In step s 11, judge whether the paper sheet delivery of conveying roller 201 etc. starts, if do not started to (in step S11
Middle "No"), then waiting for the start.In the case where having begun ("Yes" in step s 11), fixed stop device in step s 12
Component 230 prevents each gate part 210a, 210b maintain the pushing force using paper P from making gate part 210a, 210b
Mobile retentivity.
Then in step s 13, judge whether all pressures of the paper abutting part by being set to gate part 210a, 210b
Electric transducer 250 detects the abutting of paper P (whether all piezoelectric transducers 250 are ON).If all piezoelectric transducers 250
All it is not ON ("No" in step s 13), it is ON to wait until all piezoelectric transducers 250 all.
If all piezoelectric transducers 250 are all ON ("Yes" in step s 13), it is judged as that skew corrected terminates, into
Enter to step S14, the pushing force of paper P is detected by piezoelectric transducer 250.
Then in step S15, paper type is judged according to the pushing force detected.Define pushing force and paper
The table of the correspondence of type is previously stored in the storage part (not shown) in image forming apparatus 1, using the table as base
Plinth judges paper type corresponding with pushing force.In addition, piezoelectricity of the detection of pushing force in all gate part 210a, 210b
It is carried out in sensor 250, average value is found out after cumulative testing result and judges paper type based on these values, but it is uncommon
The measured deviation etc. of piezoelectric transducer 250 can be absorbed by hoping, can carry out high-precision paper type judgement.Alternatively, it is also possible to
It is elapsed according to the pressure in time of measuring to judge paper type.
Then in step s 16, according to the paper type determined come set image formed when process conditions, for example turn
Print output, paper separation output, fuser 500 fixing temperature etc. after, in step S17, decontrol stop dog part 230
It is fixed, and paper is conveyed by register roller 202,203.In addition, as long as the relieving of stop dog part 230 is in step
The pushing force of paper in S14 carries out after measuring between the paper sheet delivery of step S17.
Fig. 7 indicates to carry out paper type judgement using skew corrected shown in fig. 5/pushing force detection unit 200
In the case of image forming apparatus 1 other actions flow chart.In this example embodiment, including within the set time it can not complete askew
The tiltedly processing in the case of correction.
In the step s 21, judge whether the paper sheet delivery of conveying roller 201 etc. starts, if do not started to (in step S21
Middle "No"), then waiting for the start.In the case where having begun ("Yes" in the step s 21), the fixed stop device in step S22
Component 230 prevents each gate part 210a, 210b maintain the pushing force using paper P from making gate part 210a, 210b
Mobile retentivity.
Then in step S23, judge whether all pressures of the paper abutting part by being set to gate part 210a, 210b
Electric transducer 250 detects the abutting of paper P (whether all piezoelectric transducers 250 are all ON).
If all piezoelectric transducers 250 are all ON ("Yes" in step S23), it is judged as that skew corrected terminates, enters
To step S27, the pushing force of paper P is detected by piezoelectric transducer 250.
Then in step S28, paper type is judged according to the pushing force detected.In addition, the detection of pushing force exists
It is carried out in the piezoelectric transducer 250 of all gate part 210a, 210b, cumulative testing result finds out average value and with these values
Based on judge paper type, but it is desirable to the measured deviation etc. of piezoelectric transducer 250 can be absorbed, high-precision can be carried out
Paper type judgement.Alternatively, it is also possible to judge paper type according to the pressure passage in time of measuring.
Then in step S29, according to the paper type determined come set image formed when process conditions, for example turn
Print output, paper separation output, fuser 500 fixing temperature etc. after, decontrol stop dog part 230 in step s 30
It is fixed, and paper is conveyed by register roller 202,203.
In step S23, all it is ON ("No" in step S23) if not all piezoelectric transducers 250, then enters
Step S24 judges whether some piezoelectric transducer 250 at first is ON.If piezoelectric transducer 250 at first be ON (
"No" in step S24), then it is assumed that paper P reaches gate part 210a, 210b not yet, therefore returns to step S23.
If piezoelectric transducer 250 at first is ON ("Yes" in step s 24), investigated in step s 25 from first
Piezoelectric transducer 250 be ON rise whether have already passed through the set time.If not passing through the set time (in step s 25
"No"), then return to step S23.
If having already passed through the set time ("Yes" in step s 25), step S26 is entered, decontrols stop dog part
230 fixation enters step S29 after the paper type of immediately preceding paper is set as the paper type of the paper.
Thus, process conditions are set according to the paper type of immediately preceding paper in this case.
In this way, in this embodiment, being risen by set time, institute even if piezoelectric transducer 250 at first is ON
It is all not ON to have piezoelectric transducer 250 also, then the fixation of stop dog part 230 is decontroled, by the paper of immediately preceding paper
Type set is the paper type of the paper, therefore can prevent card caused by being performed for more than the skew corrected of crooked boundary in advance
The generation of the undesirable conditions such as paper.
As mentioned above, in embodiments of the present invention, to be set to paper P main scanning direction and in order into
Row skew corrected and multiple gate part 210a, 210b that the paper P that makes conveying stops are separately installed with supporting for detection paper P
Multiple abutting sensors 220, the piezoelectric transducer 250 connect, therefore paper P can be carried out by gate part 210a, 210b
Skew corrected.In addition, being provided with detection at least one of multiple gate part 210a, 210b for judging paper
Pushing force detection unit, that is, slit the component 211 and optical sensor 240 or piezoelectric transducer of pushing force when the paper feeding of type
250, therefore it need not be separately provided gate part 210a, 210b and pushing force detection unit, realization can be easily to tie
Structure come carry out skew corrected and paper type judgement image forming apparatus.
Claims (21)
1. a kind of image forming apparatus, which is characterized in that have:
Multiple gate parts are set to the main scanning direction of paper, stop to carry out the paper that skew corrected makes conveying;
Detection unit is abutted, each gate part is respectively arranged in, detects the abutting of paper;
Pushing force detection unit is set at least one of the multiple gate part gate part, pushing away when detecting paper feeding
Pressure;And
Paper type judging unit judges paper type according to the pushing force detected by the pushing force detection unit.
2. image forming apparatus according to claim 1, which is characterized in that
After detecting the abutting of paper by the abutting detection unit, the abutting state of paper is kept and by the pushing force
Detection unit carries out the detection of pushing force, so that paper is passed through gate part after the detection of pushing force.
3. image forming apparatus according to claim 1 or 2, which is characterized in that
The paper type judging unit all detects that paper abuts to the lock from by the multiple abutting detection unit
The timing of door part acts the detection for carrying out pushing force and paper type judgement.
4. the image forming apparatus according to any one of claims 1 to 3, which is characterized in that
The pushing force detection unit according to due to the abutting to the gate part and caused by gate part amount of movement come
Detect pushing force when paper feeding.
5. image forming apparatus according to claim 4, which is characterized in that
There is the gate part the defined gate retentivity that paper sheet delivery is limited when paper abuts, the gate retentivity to be
Pushing away for paper is detected after the 1st gate retentivity and skew corrected until paper abuts to gate part and skew corrected terminates
The 2nd gate retentivity until pressure.
6. image forming apparatus according to claim 5, which is characterized in that
1st retentivity is cannot to make the retentivity that gate part moves using the pushing force of paper.
7. image forming apparatus according to claim 5, which is characterized in that
2nd retentivity is the corresponding retentivity of the load that changes with the amount of movement according to gate part.
8. the image forming apparatus according to any one of claim 4~7, which is characterized in that
It is also equipped with image starting and describes position setup unit, image starting describes position setup unit according to by the pushing force
The amount of movement of gate part when detection unit carries out paper type judgement describes position to set the starting of image.
9. the image forming apparatus according to any one of claim 4~8, which is characterized in that
By the amount of movement for calculating the gate part based on the step-by-step counting of optical sensor and slit component.
10. the image forming apparatus according to any one of claim 1~9, which is characterized in that
The abutting of the paper carried out by the abutting detection unit is detected to be carried out by electrostatic transducer.
11. the image forming apparatus according to any one of claim 1~10, which is characterized in that
The pushing force detection unit detects pushing force according to the amount of pressure for the paper for abutting to gate part.
12. image forming apparatus according to claim 11, which is characterized in that
The paper type judging unit is according to the amount of pressure at least two positions detected by the pushing force detection unit
To differentiate paper type.
13. according to the image forming apparatus described in claim 11 or 12, which is characterized in that
The amount of pressure is measured by piezoelectric transducer.
14. the image forming apparatus according to any one of claim 1~13, which is characterized in that
After detecting abutting at first by the arbitrary abutting detection unit in the multiple abutting detection unit, exists and providing
In the case of the abutting detection unit that abutting is not detected in time, stopping for the paper implemented by the gate part is released
Only.
15. image forming apparatus according to claim 14, which is characterized in that
In the case where relieving the stopping for the paper implemented by the gate part, the paper type judging unit will immediately
In the paper type for the paper that the paper type of the paper of preceding judgement is judged to stopping being released from.
16. the image forming apparatus according to any one of claim 1~15, which is characterized in that
After the judgement for carrying out paper type by the paper type judging unit, formed according to judgement result to set image
When process conditions.
17. image forming apparatus according to claim 16, which is characterized in that
The process conditions are transfer output.
18. image forming apparatus according to claim 16, which is characterized in that
The process conditions are paper separation output.
19. image forming apparatus according to claim 16, which is characterized in that
The process conditions are fixing temperatures.
20. a kind of paper type determination method, which is characterized in that
Image forming apparatus executes following steps:
By be set to paper main scanning direction multiple gate parts in order to carry out skew corrected make conveying Lai paper stop
The step of;
By the step of being respectively arranged in abutting of the abutting detection unit of each gate part to detect paper;
By being set to the pushing force detection unit of at least one of the multiple gate part gate part come when detecting paper feeding
Pushing force the step of;And
The paper type determination step of paper type is judged according to the pushing force detected by the step of detection pushing force.
21. a kind of computer-readable recording medium, is stored with paper type decision procedure, which uses
Following steps are executed in making the computer of image forming apparatus:
By be set to paper main scanning direction multiple gate parts in order to carry out skew corrected make conveying Lai paper stop
The step of;
By the step of being respectively arranged in abutting of the abutting detection unit of each gate part to detect paper;
By being set to the pushing force detection unit of at least one of the multiple gate part gate part come when detecting paper feeding
Pushing force the step of;And
The paper type determination step of paper type is judged according to the pushing force detected by the step of detection pushing force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017078193A JP6957945B2 (en) | 2017-04-11 | 2017-04-11 | Image forming device, paper type determination method and paper type determination program |
| JP2017-078193 | 2017-04-11 |
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| Publication Number | Publication Date |
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| CN108689193A true CN108689193A (en) | 2018-10-23 |
| CN108689193B CN108689193B (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810308512.2A Active CN108689193B (en) | 2017-04-11 | 2018-04-09 | Image forming apparatus, paper type determination method and recording medium |
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| CN (1) | CN108689193B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912445A (en) * | 2019-05-08 | 2020-11-10 | 柯尼卡美能达株式会社 | Sheet discriminating apparatus and image forming apparatus |
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| JP2013154979A (en) * | 2012-01-27 | 2013-08-15 | Canon Inc | Skewed sheet correcting device and image forming apparatus |
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| JP2001019232A (en) * | 1999-07-08 | 2001-01-23 | Canon Inc | Record medium discrimination device and image recording device provided therewith |
| CN101251728A (en) * | 2007-02-23 | 2008-08-27 | 株式会社东芝 | Image forming apparatus |
| CN101251728B (en) * | 2007-02-23 | 2011-02-09 | 株式会社东芝 | Image forming apparatus |
| JP2008247570A (en) * | 2007-03-30 | 2008-10-16 | Seiko Epson Corp | Image printing device and its control method |
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| CN111912445A (en) * | 2019-05-08 | 2020-11-10 | 柯尼卡美能达株式会社 | Sheet discriminating apparatus and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108689193B (en) | 2019-11-26 |
| JP6957945B2 (en) | 2021-11-02 |
| JP2018177446A (en) | 2018-11-15 |
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