CN110087888A - Control method is discharged in the ink of ink-jet recording apparatus and ink-jet recording apparatus - Google Patents

Control method is discharged in the ink of ink-jet recording apparatus and ink-jet recording apparatus Download PDF

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Publication number
CN110087888A
CN110087888A CN201780077145.3A CN201780077145A CN110087888A CN 110087888 A CN110087888 A CN 110087888A CN 201780077145 A CN201780077145 A CN 201780077145A CN 110087888 A CN110087888 A CN 110087888A
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CN
China
Prior art keywords
ink
nozzle
bad
bad nozzle
discharge
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
CN201780077145.3A
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Chinese (zh)
Inventor
渡边祐树
竹谷圣
森雅和
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.)
Konica Minolta Inc
Konica Minolta Opto Inc
Original Assignee
Konica Minolta Opto 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 Konica Minolta Opto Inc filed Critical Konica Minolta Opto Inc
Publication of CN110087888A publication Critical patent/CN110087888A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/1652—Cleaning of print head nozzles by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head
    • B41J2/16526—Cleaning of print head nozzles by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head by applying pressure only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16579—Detection means therefor, e.g. for nozzle clogging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16585—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles for paper-width or non-reciprocating print heads

Abstract

The ink discharge control method of a kind of ink-jet recording apparatus and ink-jet recording apparatus is provided, pollution of the empty injection to ink discharge face is able to suppress.Ink-jet recording apparatus (1) has: ink discharge unit (20), has the ink discharge face for the nozzle for being provided with discharge ink；Empty injection control mechanism (30,21), be not based on the image data of the image of record object and from the empty injection control of nozzle discharge ink；Storage unit (34), the related bad nozzle information of bad nozzle of storage and the abnormal discharge ink in nozzle；In empty injection control, empty injection control mechanism is able to select whether that ink is discharged in the nozzle for being determined as bad nozzle according to bad nozzle information from nozzle.

Description

Control method is discharged in the ink of ink-jet recording apparatus and ink-jet recording apparatus
Technical field
The present invention relates to the inks of a kind of ink-jet recording apparatus and ink-jet recording apparatus, and control method is discharged.
Background technique
In the past, there are a kind of opening portions of nozzle that face is discharged from the ink for being set to ink discharge unit to arrange recording medium Ink records the ink-jet recording apparatus of image out.In such ink-jet recording apparatus, sometimes because from nozzle opening portion Foreign matter is flowed into nozzle, or because ink solidifies in nozzle opening portion, and ink can not be normally discharged not by causing to generate Good nozzle.Undesirable form is discharged as the ink in bad nozzle, there is the discharge rate of ink or the exception of discharge direction etc..Separately Outside, compared with normal nozzles, bad nozzle more generates small misty ink along with ink discharging operation sometimes (ink mist).
Such bad nozzle is related with the record image quality reduction of image.Therefore, there is following technology in the past: by advising At the time of determining, or the instruction based on user, carry out the ink discharge (ink for being not based on the image data of the image of record object Empty injection), come prevent foreign matter inflow or ink solidification to inhibit the generation of bad nozzle, or eliminate the stifled of nozzle Plug is to realize recovery (such as patent document 1) of the bad nozzle to normal condition.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2008-149629 bulletin
Summary of the invention
The technical problems to be solved by the invention
But the difference of the open state according to the nozzle opening portion of bad nozzle, exist in empty course of injection never The technical issues of ink or ink mist of good nozzle discharge are attached to ink discharge face and pollute ink discharge face.If so It polluted ink discharge face, then the ink or ink mist for being attached to ink discharge face can fall in recording medium and be stained record and be situated between Matter, or be solidified as the state of a part of plug nozzle opening portion and generate new bad nozzle.
The purpose of the invention is, provides a kind of ink-jet record dress for being able to suppress empty injection and ink being discharged the pollution in face It sets and control method is discharged in the ink of ink-jet recording apparatus.
For solving the means of technical problem
In order to achieve the above object, the invention for the ink-jet recording apparatus that technical solution 1 is recorded is as follows:
A kind of ink-jet recording apparatus, has:
Face is discharged with ink in ink discharge unit, and ink discharge face is provided with the opening portion of the nozzle of discharge ink；
Empty injection control mechanism be not based on the image data of the image of record object and ink is discharged from the nozzle The empty injection control of water；
Storage unit, related bad nozzle is believed with the bad nozzle of the abnormal discharge ink in the nozzle for storage Breath；
In the empty injection control, the sky injection control mechanism is able to select whether from the nozzle according to Bad nozzle information is determined as the nozzle discharge ink of bad nozzle.
The invention that technical solution 2 is recorded is as follows:
On the basis of the ink-jet recording apparatus that technical solution 1 is recorded, have:
State detecting section is discharged, detects discharge state of the ink from the nozzle；
Bad nozzle determines mechanism, determines bad nozzle, and base according to the testing result of the discharge state detecting section The bad nozzle information is stored in the storage unit in the definitive result of the bad nozzle.
The invention that technical solution 3 is recorded is as follows:
On the basis of the ink-jet recording apparatus that technical solution 1 or 2 is recorded,
In the empty injection control, in the case where meeting rated condition, sky injection control mechanism selection not from Ink is discharged according to the nozzle that the bad nozzle information is determined as bad nozzle in the nozzle.
The invention that technical solution 4 is recorded is as follows:
On the basis of the ink-jet recording apparatus that technical solution 3 is recorded,
In the case where and then carrying out image recording after ink is discharged by the empty injection control, the empty injection control Mechanism processed, which is judged as, meets the rated condition.
The invention that technical solution 5 is recorded is as follows:
On the basis of the ink-jet recording apparatus that technical solution 3 or 4 is recorded, have:
Cleaning section cleans the ink and face is discharged；
Control mechanism is cleaned, the cleaning action in ink discharge face is carried out using the cleaning section；
After ink is discharged by the empty injection control and the case where carrying out image recording before the progress cleaning action Under, the sky injection control mechanism, which is judged as, meets the rated condition.
The invention that technical solution 6 is recorded is as follows:
On the basis of the ink-jet recording apparatus that any one of technical solution 3 to 5 is recorded,
In the empty injection control, the case where the image-recording region outlet from nozzle to recording medium goes out ink Under, the sky injection control mechanism, which is judged as, meets the rated condition.
The invention that technical solution 7 is recorded is as follows:
On the basis of the ink-jet recording apparatus that any one of technical solution 3 to 6 is recorded,
The sky injection control mechanism is able to carry out different a variety of empty injection controls, is carrying out a variety of empty injections In the case where defined empty injection control in control, the sky injection control mechanism, which is judged as, meets the rated condition.
The invention that technical solution 8 is recorded is as follows:
On the basis of the ink-jet recording apparatus that any one of technical solution 1 to 7 is recorded,
The bad nozzle information includes related with initial undesirable initial bad nozzle with the ink discharge unit Initial bad nozzle information,
The storage unit has the initial bad nozzle information storage unit for storing the initial bad nozzle information,
The initial bad nozzle information storage unit is wholely set with the ink discharge unit.
The invention that technical solution 9 is recorded is as follows:
On the basis of the ink-jet recording apparatus that any one of technical solution 1 to 8 is recorded,
The bad nozzle information includes related with initial undesirable initial bad nozzle with the ink discharge unit Initial bad nozzle information,
In the empty injection control, sky injection control mechanism selection is not from according to the initial bad nozzle information It is determined as the nozzle discharge ink of initial bad nozzle.
In addition, in order to achieve the above object, control method is discharged in the ink for the ink-jet recording apparatus that technical solution 10 is recorded Invention it is as follows:
A kind of ink discharge control method of ink-jet recording apparatus,
The ink-jet recording apparatus has: ink discharge unit, face is discharged with ink, ink discharge face is provided with row The opening portion of the nozzle of ink out；Storage unit stores related with the bad nozzle of discharge ink abnormal in the nozzle Bad nozzle information；
The ink discharge control method of the ink-jet recording apparatus includes to be not based on the image data of the image of record object And the empty injecting step of ink is discharged from the nozzle,
In the empty injecting step, choose whether to be determined as from the nozzle according to the bad nozzle information bad Ink is discharged in the nozzle of nozzle.
Invention effect
According to the present invention, have the effect of being able to suppress pollution of the empty injection to ink discharge face.
Detailed description of the invention
Fig. 1 is the figure for indicating the Sketch of ink-jet recording apparatus of embodiments of the present invention.
Fig. 2 is the block diagram for indicating the major function of ink-jet recording apparatus and constituting.
Fig. 3 is the schematic diagram for indicating the structure of clearer.
Fig. 4 is the schematic diagram for indicating the structure in inspection portion.
Fig. 5 is the figure being illustrated to the detection operation of bad nozzle.
Fig. 6 is the figure being illustrated to the empty jeting area of the progress ink sky injection in recording medium.
Fig. 7 is the block diagram for indicating the function related with empty injection control in a control unit and constituting.
Fig. 8 is the flow chart for indicating the control sequence of image recording processing.
Fig. 9 is the flow chart for indicating the control sequence of image recording processing of variation 1.
Specific embodiment
Hereinafter, control method is discharged based on ink of the attached drawing to ink-jet recording apparatus and ink-jet recording apparatus of the invention Embodiment is illustrated.
Fig. 1 is the figure for indicating the Sketch of ink-jet recording apparatus 1 of embodiments of the present invention.
Fig. 2 is the block diagram for indicating the major function of ink-jet recording apparatus 1 and constituting.
Ink-jet recording apparatus 1 has delivery section 10, head unit 20 (ink discharge unit), control unit 30, and (bad nozzle determines Mechanism, cleaning control mechanism), head unit moving portion 41, maintenance department 42, inspection portion 43 (discharge state detecting section), operation display Portion 44, input/output interface 45 and bus 46 etc..
Delivery section 10 has driven roller 11, driven voller 12 and conveyer belt 13 etc..
Driven roller 11 is rotated centered on rotary shaft under the driving of conveying motor (not shown).Conveyer belt 13 is inside quilt The cricoid band that driven roller 11 and driven voller 12 support, does circumferential movement along with the spinning movement of driven roller 11.Driven voller 12 are rotated centered on the rotary shaft parallel with the rotary shaft of driven roller 11 along with the circumferential movement of conveyer belt 13.As defeated Send band 13, using with the contact surface of driven roller 11 and driven voller 12 at be bent flexibly and reliably support recording medium M's Material, for example, being able to use the band of the resins such as rubber, steel band etc..The conveyer belt 13 has the material of absorption recording medium M And/or structure, so conveyer belt 13 more stably can be placed in recording medium M.Delivery section 10 is placed in recording medium M In the state of on the conveyor surface of conveyer belt 13, by carrying out conveyer belt 13 with speed corresponding with the rotation speed of driven roller 11 It is circumferential mobile, to recording medium M is conveyed along the moving direction (conveying direction: the Y-direction of Fig. 1) of conveyer belt 13 defeated Send movement.It is provided with encoder (not shown) (rotary encoder) in the drive shaft of driven roller 11, conveyer belt 13 can be measured Circumferential moving distance.
It should be noted that the conveying of recording medium M for example can also be during carrying out ink discharge using delivery section 10 The mode temporarily ceased intermittently carries out.Movement of the conveying movement comprising temporarily ceasing conveying as described above of delivery section 10.
In the present embodiment, use fabric as recording medium M.Recording medium M is by the reel from winding recording medium M It rolls out (output) and is supplied on conveyer belt 13.Recording medium M is in rectangle, and the width direction orthogonal with conveying direction be (Fig. 1's X-direction) width be about 2 [m], the length of conveying direction is about 4000 [m].It should be noted that it is defeated also to can use delivery section 10 Send the width of width direction less than the recording medium M of 2 [m].In addition, delivery section 10, which can both use, can convey width direction The structure of recording medium M of the width greater than 2 [m] (for example, about 4 [m]), alternatively, it is also possible to using the width for the record Jie M that can transport Spend the structure of the maximum width less than 2 [m] in direction.
It should be noted that recording medium M is not limited to above-mentioned fabrics, being able to use paper or flaky resin etc. can make to be discharged to surface Ink adhesion various media.
Head unit 20 is being recorded based on image data from nozzle to the recording medium M discharge ink conveyed by delivery section 10 Image is recorded on medium M.In the ink-jet recording apparatus 1 of present embodiment, from the conveying direction upstream side of recording medium M, According to the sequence of Y, M, C, K color, it is arranged with side by side at predetermined intervals and yellow (Y), magenta (M), cyan (C), black (K) corresponding four head units 20 of the ink of four kinds of colors.
Each head unit 20 has multiple (being in the present embodiment 7) record heads 22 and head control unit 21, multiple records The direction that first 22 edge intersects with the conveying direction of recording medium M (is in the present embodiment the width side orthogonal with conveying direction To, i.e. X-direction) it is arranged with multiple recording elements respectively, head control unit 21 controls the ink discharging operation of record head 22.Each record First 22 have the ink discharge face for the opening portion for being provided with nozzle, which is discharged face configuration in the conveyor surface pair with conveyer belt 13 The position set.In addition, in each head unit 20, with the head unit 20 be provided integrally with the first storage unit 23 (storage unit, it is initial not Good nozzle information storage unit).
The recording element that record head 22 is included separately includes the pressure chamber of storage ink, is set to the wall surface of pressure chamber The nozzle of piezoelectric element and discharge ink.If applying driving signal from the driving circuit in record head 22 to piezoelectric element, Piezoelectric element is deformed according to the driving signal, so that the indoor pressure change of pressure, from the nozzle discharge ink being connected to pressure chamber Water.Hereinafter, also ink discharging operation will be known as from the movement of nozzle discharge ink according to driving signal.It should be noted that nozzle at Movement in the case where ink cannot being discharged according to driving signal for aftermentioned bad nozzle is also contained in ink discharging operation.
Configuration range covering in the X-direction for the recording element that head unit 20 is included is situated between by the record that delivery section 10 conveys Width in the X-direction in the region for being able to record image in matter M, head unit 20 with when recording image relative to delivery section 10 The mode of fixed position uses.That is, ink-jet recording apparatus 1 records image in a manner of single pass.
In head unit 20, machining deviation or the characteristic deviation of piezoelectric element when being formed sometimes because of nozzle etc., and Cause when manufacturing head unit 20, a part of nozzle becomes the bad nozzle that ink can not normally be discharged.In addition, remembering in ink-jet In the case where having used head unit 20 in recording device 1, sometimes because foreign matter is flowed into from nozzle opening portion and is blocked in nozzle, Or because ink is set in nozzle opening portion, and there is bad nozzle to hair after causing.Ink as bad nozzle is discharged Undesirable form has and ink, the discharge rate of ink and discharge direction exception is not discharged.In addition, in the discharge rate or discharge of ink Direction has in abnormal bad nozzle, compared with normal nozzles, is discharged and more generates small along with ink sometimes Misty ink (ink mist).
In the present embodiment, (first in the presence of initial undesirable bad nozzle using having been carried out after manufacture as head unit 20 Begin bad nozzle) detection head unit.In addition, in the present embodiment, will more be leaned on when than detecting the initial bad nozzle The bad nozzle just detected afterwards sends out nozzle bad after being known as.
The detection of initial bad nozzle is carried out by external (separately setting relative to ink-jet recording apparatus 1) check device 's.For example, ink (or drop of inspection) is discharged from each nozzle of head unit 20, arranged using the check device from ink Out the ink of the side shooting discharge in direction and judge the discharge state of ink.The feelings of ink are not detected in photographed data Under condition, it is judged to that ink is not discharged, in the case where the discharge direction of ink is crooked, is determined as that ink discharge direction is abnormal, In the abnormal situation of speed of circling in the air of ink, it is determined as that ink discharge rate is abnormal, the nozzle for determining these situations is detected For initial bad nozzle.Here, the discharge direction skew of so-called ink, refers to ink to relative to original discharge direction skew Direction discharge.
Head control unit 21 with from control unit 30 control signal, from be installed on driven roller rotary encoder input The count number of the pulse signal corresponding appropriate moment exports various control signals and picture number to the head driving portion of record head 22 According to.The control signal and image data that the head driving portion of record head 22 is inputted according to from the beginning control unit 21, to the note of record head 22 Record component feeding makes piezoelectric element carry out the driving signal of deformed movement, and ink is discharged from the opening portion of each nozzle.In this implementation In mode, empty injection control mechanism is constituted using control unit 30 and head control unit 21.
First storage unit 23 is by flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory: electrically erasable programmable read-only memory) as nonvolatile memory constitute, storage with it is above-mentioned initial The related initial bad nozzle data D1 (initial bad nozzle information) of bad nozzle.In initial bad nozzle data D1, press Initial bad nozzle is determined according to arrangement serial number of the nozzle in head unit 20.It should be noted that the first storage unit 23 can also be by ROM (Read Only Memory: read-only memory) is constituted.
Head unit moving portion 41 rises head unit 20 along the Z-direction (range direction) vertical with the conveyor surface of conveyer belt 13 Or decline.In addition, head unit moving portion 41 is moved to the head unit 20 for rising to specified position along Z-direction in X direction with after The opposed position in the ink incorporating section of the maintenance department 42 stated.Head unit 20 is gone up and down along Z-direction in head unit moving portion 41 Mechanism for example by the column sections that extend along Z-direction and can be fixed with head unit 20 and be rotated in Z using stepper motor It is constituted on direction along the moving portion that column sections move.In addition, moving head unit 20 in X direction in head unit moving portion 41 Mechanism is by the guide rail that can for example extend in X direction and is fixed with head unit 20 and constitutes along the slide unit that guide rail moves.
Head unit moving portion 41 is arranged in correspondence with 4 with 4 head units 20 respectively.
Maintenance department 42 has ink incorporating section (not shown), which, which receives, passes through spray of the ink from head unit 20 The empty ink for spraying (injection) and being discharged of mouth.Here, empty injection is for making to restore in bad nozzle to normal row The nozzle of the normal condition of ink is restored to the normal condition out, or inhibits to generate the purpose of new bad nozzle, from nozzle The movement of the head unit 20 of ink is discharged.In sky injection, the figure comprising the record object being not based in ink-jet recording apparatus 1 As (by the usual image of print out task instruction record, various test images etc.) image data and arranged from the nozzle of head unit 20 The entire movement of ink out.For example, in addition to the sky that the ink incorporating section to maintenance department 42 carries out sprays (the hereinafter also referred to second sky Injection) other than, there are also spray in the implementation procedure of print out task the sky carried out outside the image-recording region of recording medium M (hereinafter also referred to first empty injection) etc..For the concrete condition of sky injection, it is detailed in aftermentioned.
In addition, maintenance department 42 has clearer (cleaning section), which is wiped, is cleaned the ink row of head unit 20 The cleaning action appeared (hereinafter also referred to as " wiping ").
Fig. 3 is the schematic diagram for indicating the structure of clearer 421.
Clearer 421 is wound with the wiper comprising regulation medical fluid in outer peripheral surface, and the side of Y-direction is parallel to rotary shaft Formula configuration.There is rotation motor (not shown) and conveying motor, clearer 421 to be revolved according to the movement of rotation motor for maintenance department 42 Turn, and is moved according to the movement of conveying motor along Z-direction and X-direction.In the case where carrying out above-mentioned wiping, clearer 421 are moved using the movement of conveying motor along Z-direction, to abut with the ink of head unit 20 discharge face, in this state It is moved in X direction while the movement using rotation motor carries out rotation according to the movement of conveying motor, to wipe Face is discharged in the ink of head unit 20.Clearer 421 is arranged in correspondence with 4 with 4 head units 20 respectively.
Inspection portion 43 act for detecting ink from the regulation measurement of the discharge state of each nozzle.
Fig. 4 is the schematic diagram for indicating the structure in inspection portion 43.
Inspection portion 43 has illumination region 431, acceptance part 432, mobile unit 433, mobile band 434, roller 435a, 435b, horse Up to 436 and linear encoder 437 etc..Inspection portion 43 using illumination region 431 always from the path irradiation light of circling in the air of the ink of nozzle, And the light quantity of the light is measured using acceptance part 432.By judging measured light quantity whether because ink is corresponding with nozzle Appropriate location decline, checks discharge state of the ink from each nozzle.For example, as shown in figure 4, the measurement movement in inspection portion 43 is needle To more leaning on the head unit 20 of ﹢ Z-direction side to carry out when being moved to using head unit moving portion 41 than operation of recording.Alternatively, the survey Fixed movement can also be such that the position in the mobile portion of falling inspection 43 of head unit 20 carries out.
Illumination region 431 is along optical axis L direction output light (being herein luminous ray).The detection of acceptance part 432 is defeated from illumination region 431 Light out.The light exported from illumination region 431 has directive property, in the state that centre does not have shade, i.e. ink, utilizes light Portion 432 can detect that the major part of exported light.On the other hand, acceptance part 432 is set to the narrow ink in test object Water enter in light-receiving area in the case where light reduction amount relative to total incident light quantity be the ratio being able to detect that or more model It encloses, and wide to the case where generating dislocation related with the spinning movement precision of the installation accuracy in inspection portion 43 or motor 436 The position of lower ink will not be detached from the range of light-receiving area.
Mobile unit 433 is plate-shaped member, and illumination region 431 and acceptance part 432 are fixed in plate face.Mobile unit 433 One end be fixed on mobile band 434.
Mobile band 434 is annular in shape, is arranged at roller 435a, 435b driving of inner peripheral surface and rotates.Mobile band 434 pass through by Driving rotates and moves mobile unit 433 in X direction.
Motor 436 makes roller 435a carry out spinning movement.The rotation speed of motor 436 can be based on the control from control unit 30 Signal processed and suitably change.
The output of linear encoder 437 indicates the signal of the movement of mobile unit 433.As linear encoder 437, without spy It does not limit, such as the encoder for reading the form of scale using optical sensor can be used.
Operation display part 44 has display device as liquid crystal display or organic el display and operation key or again Be laminated on the picture of display device and the touch panel that configures as input unit.Operation display part 44 is shown on the display apparatus Various information, and user is converted into operation signal for the input operation of input unit and is output to control unit 30.
Input/output interface 45 be between external device (ED) 2 carry out data transmit-receive mechanism, such as by various serial line interfaces, Any one of various parallel interfaces or their combination are constituted.
Bus 46 is the path for sending and receiving signals between control unit 30 and other structures.
Control unit 30 has CPU31 (Central Processing Unit: central processing unit), RAM32 (Random Access Memory: random access memory), ROM33 and the second storage unit 34 (storage unit).
CPU31 reads the program of the various controls stored in ROM33, sets data and be stored in RAM32, and It executes the program and carries out various calculation process.Thus CPU31 is uniformly controlled the molar behavior of ink-jet recording apparatus 1.For example, CPU31 utilizes 10 conveying recording medium M of delivery section on one side, the picture number on one side based on the image stored in the second storage unit 34 According to making ink eject record image from nozzle to recording medium M using head unit 20.
RAM32 provides the memory space of operation, temporary storing data to CPU31.In RAM32, it is stored with for sentencing The maintenance complement mark of the status of implementation of disconnected service action.Here, maintenance complement mark is the binary number indicated with 1 bit According to.It should be noted that RAM32 also may include nonvolatile memory.
ROM33 stores program, the setting data etc. by the CPU31 various controls executed.It should be noted that instead of ROM33, Also EEPROM (Electrically Erasable Programmable Read Only Memory: electric erasable can be used Programmable read only memory), the rewritable nonvolatile memory such as flash memory.
Second storage unit 34 stores bad nozzle data D2 (bad nozzle information) related with bad nozzle, the bad spray Mouth includes the initial bad nozzle as shown in the initial bad nozzle data D1 of the first storage unit 23 and moving by inspection portion 43 That makees to detect rear sends out nozzle bad.In bad nozzle data D2, using the arrangement serial number of the nozzle in each head unit 20 come Determine bad nozzle.Bad nozzle data D2 is the data generated in the detection operation of aftermentioned bad nozzle.It should be noted that Bad nozzle data D2 can also be only comprising related with the bad nozzle (send out bad after i.e. nozzle) in addition to initial bad nozzle Data.In this case, initial bad nozzle is determined by referring to the initial bad nozzle data D1 of the first storage unit 23.
In addition, storing the print out task inputted via input/output interface 45 from external device (ED) 2 in the second storage unit 34 (image recording order) and image data, by the corrected image data of CPU31.As the second storage unit 34, such as can make With HDD (Hard Disk Drive: hard disk drive), alternatively, it is also possible to use DRAM (Dynamic Random simultaneously Access Memory: dynamic random access memory) etc..
External device (ED) 2 is, for example, PC, supplies print out task and figure to control unit 30 via input/output interface 45 As data etc..
Then, the various movements related with the management of bad nozzle in ink-jet recording apparatus 1 are illustrated.Here, Include in the management of bad nozzle: the detection of bad nozzle, by the correction of image data to ink is not discharged from bad nozzle The supplement setting of progress, empty injection, the service action of head unit 20 and head unit 20 in print out task implementation procedure are more It changes.
Firstly, being illustrated to the detection operation of the bad nozzle executed in ink-jet recording apparatus 1.
In ink-jet recording apparatus 1, in the case that the bad nozzle as defined in meeting detects beginning condition, head unit is carried out The detection of 20 bad nozzle.Here, bad nozzle detection beginning condition can be for example set to: bad what is finally carried out After the detection operation of nozzle, head unit 20 has carried out the operation of recording of stipulated number or more.Alternatively, bad nozzle detection starts item Part also can be set as: after the detection operation of the bad nozzle finally carried out, consume the ink of specified amount or more.In addition, It can also start the detection of bad nozzle according to the instruction of user.
Fig. 5 is the figure being illustrated to the detection operation of bad nozzle.
In the figure, it schematically shows from the side overlook view head unit 20 opposite with the conveyor surface of conveyer belt 13 Record head 22 and inspection portion 43 mobile unit 433 visual angle under, the nozzle 221 on the ink of record head 22 discharge face 222 Position.
In the case where starting to detect bad nozzle, head unit 20 is using head unit moving portion 41 than operation of recording Shi Gengxiang ﹢ Z-direction side is mobile, and to configuration inspection portion 43 between head unit 20 and conveyer belt 13.Alternatively, head unit 20 can also be moved to The position of 43 top of inspection portion.
Also, based on signal related with the measurement of linear encoder 437, make mobile unit 433 to right with record head 22 The position set is mobile.That is, mobile unit 433 is made to be moved to following position: exporting from illumination region 431 and detected by acceptance part 432 The ink of the crosscutting nozzle 221 from front of optical axis L of light circle in the air the position in path.Here, the nozzle 221 of front be near The nozzle 221 of the end (left end of Fig. 5) positioned at ﹢ X-direction side in the record head 22 of ﹢ X-direction side.Then, on one side from record The ink of stipulated time is discharged in first 22 each nozzle 221 respectively in order, makes to be moved to position corresponding with the nozzle 221 on one side Illumination region 431 and acceptance part 432 act, examined based on discharge state of the actinometry result of acceptance part 432 to ink It looks into.That is, being detected as not arranging in the case where light quantity caused by position corresponding with nozzle 221 is not detected because of ink declines Ink out is detected as the row of ink in the case where detecting the position of light quantity decline from 221 corresponding positional shift of nozzle Direction skew out.The nozzle 221 of discharge ink is successively singly changed to the ﹣ X-direction of Fig. 5, until variation is near ﹣ X The nozzle 221 at the end (being right end in Fig. 5) of the record head of direction side.Change speed at this time is set to keep certain, Make mobile unit 433 and certain change speed matchingly constant speed it is mobile.
The detection operation of bad nozzle is comprising the nozzle for being determined as bad nozzle according to bad nozzle data D2 Whole nozzles inside carry out for object.In addition, the detection operation of above-mentioned bad nozzle is distinguished for 4 head units 20 It carries out.
In this way, using the movement of illumination region 431 and acceptance part 432, measurement reflection nozzle 221 of the ink from each head unit 20 Discharge state light quantity, using the measurement as a result, check discharge state of the ink from nozzle 221.The inspection the result is that: In the case where detecting that the discharge direction that ink or ink is not discharged is crooked, corresponding nozzle is determined as bad nozzle.Such as The bad nozzle of fruit is determined, then the arrangement serial number gencration based on identified nozzle 221 in head unit 20 indicates bad nozzle Bad nozzle data D2, and be stored in the second storage unit 34.
Here, in the case where being stored with bad nozzle data D2 in the second storage unit 34, with new bad spray Mouth data D2 covers existing bad nozzle data D2.It should be noted that needing to send out bad referring to after the situation occurred of nozzle In the case where history, the new bad nozzle data D2 different from existing bad nozzle data also can be generated and deposited Storage.
Then, the image data correction based on bad nozzle data D2 is illustrated.
In ink-jet recording apparatus 1, in the case where bad nozzle has been determined using bad nozzle data D2, for by beating The image data of the specified image of print task, after the correction for being inhibited to record image entanglement as caused by bad nozzle, note Record the image.For example, correcting the figure of image as follows in the case where the nozzle 221a of Fig. 5 is determined as bad nozzle As data: correcting the image data of image in a manner of ink not being discharged from nozzle 221a, and bad with this by increasing Near the adjacent nozzle of nozzle (the nozzle 221b in Fig. 5) or the bad nozzle nozzle (such as nozzle 221b in Fig. 5, Discharge quantity of ink 123c) carrys out the supplement to not carrying out from bad nozzle discharge ink.Then, by based on the image after correction Ink, the image that image quality declines caused by record inhibits because of bad nozzle are discharged from head unit 20 to recording medium M for data.
It should be noted that in the case where replacing head unit 20 and utilize original head unit 20 record image, resetting The bad nozzle data D2 of the head unit 20.That is, because the head unit 20 is the state for sending out nozzle bad there is no after, base In the initial bad nozzle data D1 that the first storage unit 23 of the head unit 20 stores generate bad nozzle data D2 and by this not Good nozzle data D2 is stored in the second storage unit 34.Then, the image for image being corrected based on the new bad nozzle data D2 Data.It therefore, can be in the inspection without bad nozzle in the case where head unit 20 is changed to original head unit The correction of image data is carried out in the state of survey movement, and image can be recorded based on the image data after the correction.
Then, the empty injection of the ink carried out in print out task implementation procedure (the first empty injection) is illustrated.
In ink-jet recording apparatus 1, if the solvent gasification of the ink near the opening portion of nozzle 221 leads to the opening portion The viscosity of neighbouring ink increases, then can generate the amount of ink be discharged, the deviations such as direction and speed of circling in the air of circling in the air were set originally The fixed bad nozzle that ink cannot well be discharged.Especially in the present embodiment, due to will be to the recording medium of 4000m long M continuously records the usual image of record object, therefore after starting image recording movement, is 60 [m/ in such as conveying speed Min] in the case where, also to continue the image recording movement more than 1 hour.In image recording movement, according to usual image The difference of content, it may appear that the discharge frequency of ink is extremely low or without the nozzle 221 that ink is discharged, and such nozzle 221 exists The lasting period of image recording movement is easy to become bad nozzle because above-mentioned ink thickens.
Therefore, in the ink-jet recording apparatus of present embodiment 1, in order to inhibit the generation of such bad nozzle, for Region other than the record area of the usual image in recording medium M in conveying carries out being discharged the first of ink from nozzle 221 Sky injection.
Fig. 6 is the figure being illustrated to the empty jeting area of the progress ink sky injection in recording medium.
As shown in fig. 6, in the present embodiment, to the band-like empty jeting area 52 extended in X direction in recording medium M Carry out the first empty injection.The upstream side and downstream side of empty jeting area 52 in the Y direction record usual image 51.That is, empty spray Region 52 is penetrated to be set in outside the record area of usual image 51.It is multiple that usual image 51 is that the front-end and back-end of Y-direction are connected Unit image along Y-direction be connected made of strip image, by the record area of usual image 51 continuously at a string in a manner of It is recorded.
Empty jeting area 52 is sprayed by the color separation sky for being carried out ink sky injection respectively using head unit 20 corresponding with Y, M, C, K Penetrate region 52Y, 52M, 52C, 52K composition.Color separation sky jeting area 52Y, 52M, 52C, 52K be it is adjacent to each other in the Y direction and The recording interval of nozzle 221 in head unit 20 and the belt-like zone that extends in the X direction.In addition, being sprayed for color separation sky Region 52Y, 52M, 52C, 52K are penetrated, continuously carries out about 1000 ink discharges from each nozzle of head unit 20 respectively.Sky spray It is equal with the recording interval in the X-direction of usual image 51 to penetrate the range in the X-direction in region 52.Spray color separation sky Region 52Y, 52M, 52C, 52K are the range not overlapped each other, primarily to inhibiting the ink discharge rate of unit area and pressing down The back of ink processed is saturating, the back of ink does not occur thoroughly or when the back of ink does not become problem thoroughly, color separation can also be made empty Jeting area 52Y, 52M, 52C, 52K are overlapped.
In the first empty injection, according to the position adjustment ink row in the Y-direction for the nozzle 221 for being set to each record head 22 Moment out, ink is discharged for band-like (length the is rectangular-shaped) range in the Y-direction on recording medium M.
In addition, in the present embodiment, in the case where carrying out the empty injection of ink, being able to select whether from bad nozzle Ink is discharged in the nozzle 221 for being determined as bad nozzle in data D2.In the above-mentioned first empty injection, not from bad nozzle data D2 In be determined as bad nozzle nozzle 221 be discharged ink, but only from normal nozzle 221 be discharged ink.First is utilized as a result, Sky injection, can inhibit the generation of following unfavorable condition: the ink or ink mist being discharged from bad nozzle are attached to ink row It appears 222 and makes ink discharge face 222 ink is under the influence ofs air-flow or cloth powder etc. at the casual moment by inkiness Under fall on recording medium M, alternatively, being solidified as the state of a part of plug nozzle opening portion and generating new bad nozzle. In particular, the case where region other than the record area as shown in Figure 6 to the usual image 51 of recording medium M carries out empty injection Under, after just having carried out sky injection, without ink discharge face 222 cleaning and carry out the operation of recording of usual image 51, Therefore the ink from bad nozzle can cause recording medium M to be stained the pollution in ink discharge face 222 because ink is fallen, But by not carrying out ink discharge from bad nozzle in sky injection, the hair of such unfavorable condition can be effectively inhibited It is raw.
In this way, in the present embodiment, satisfaction " and then carrying out image recording after through empty injection discharge ink " This condition (rated condition), " after passing through empty injection and carrying out ink discharge and the cleaning in progress cleaning ink discharge face 222 is dynamic Image recording is carried out before making " this condition (rated condition) or " from image-recording region of the nozzle 221 on recording medium M In the case where this condition (rated condition) of region discharge ink in addition ", in sky injection, not from bad nozzle data D2 The nozzle 221 for being determined as bad nozzle carries out ink discharge.
Hereinafter, being illustrated to the control action of the first empty injection in ink-jet recording apparatus 1.
In the implementation procedure of print out task, empty injection is being become and using 10 conveying recording medium M of delivery section The specified position (front end of color separation sky jeting area 52Y, 52M, 52C, 52K) of object is moved to the ink discharge of each head unit 20 Behind position, starts with each head unit 20 and carry out empty injection (hereinafter, above-mentioned specified position is also known as empty injection starting position). Export from the rotary encoder for being installed on driven roller for each head unit 20 and when the pulse signal of preset quantity, It is judged as that empty injection starting position is moved to ink drain position.
Fig. 7 is the block diagram for indicating the function related with empty injection control in a control unit 21 and constituting.
As shown in fig. 7, head control unit 21 has control circuit 21a, switching part 21b and image data storing section 21c.Head control Portion 21 processed for example can be to include circuit substrate and FPGA (the Field Programmable that is installed on the circuit substrate Gate Array: field programmable gate array) structure be provided with control circuit in the FPGA in the present embodiment 21a, switching part 21b and image data storing section 21c.It should be noted that also c can be set in FPGA's image data storing section 21 It is external.In addition, ASIC (Application Specific Integrated Circuits: specially also can be used instead of FPGA With integrated circuit) such other semiconductor integrated circuit.
The image data Da of usual image 51 and the empty injection for sky injection are stored in image data storing section 21c With data Db.Wherein, empty injection is to be used to carry out ink sky spray using the nozzle 221 of each head unit 20 for generating with data Db The data for the driving signal penetrated are to reach the identical data of maximum full version image data with the shading value of all pixels.
Under the control of control circuit 21a, image data Da and empty injection are output to switching part 21b with data Db.Root According to the switch-over control signal for being output to switching part 21b from control circuit 21a, by image data Da and empty injection in data Db Any one is output to the head driving portion 22a of record head 22 from switching part 21b.
Control circuit 21a enemy's driving portion 22a output for carving the control signal for carrying out ink discharging operation in due course. In addition, control circuit 21a to switching part 21b export switch-over control signal, thus from switching part 21b to head driving portion 22a according to Each line exports image data Da and empty injection any one of data Db.That is, control circuit 21a is recording usual image When 51, image data Da is exported from switching part 21b to head driving portion 22a.In addition, control circuit 21a is when starting empty injection, into The switching of row switching part 21b starts to supply empty injection data Db to head driving portion 22a, and data are used in the injection of sustainable supply sky Db is at the time of empty injection action terminates.In addition, control circuit 21a is referring to the bad nozzle number for being stored in the second storage unit 34 According to D2, with from the beginning driving portion 22a does not supply driving signal to the recording element with the nozzle 221 for being confirmed as bad nozzle Mode supplies control signal to head driving portion 22a.
It should be noted that because it is identical that empty injection, which is the full version image data constituted with by same pixel data with data Db, Preset pixel data is supplied under the control of control circuit 21a by the data of structure repeatedly so can also use The mode of switching part 21b replaces reading sky injection data Db from image data storing section 21c and is supplied to switching part with this The mode of 21b.
By carrying out such control, usual image 51 is recorded in the record area of usual image 51, in usual image 51 Record area outside carry out empty injection.
Then, the service action of the head unit 20 based on bad nozzle data D2 is illustrated.
In ink-jet recording apparatus 1, the number of the bad nozzle in each head unit 20 as shown in bad nozzle data D2 In the case that at least one party in the configuration of amount and the bad nozzle in the head unit 20 meets defined maintenance beginning condition, Service action as defined in starting.In the service action of present embodiment, the second empty injection and wiping are persistently carried out.
Here, maintenance beginning condition related with the quantity of bad nozzle can be set to: by bad nozzle data D2 Shown in bad nozzle quantity be more than defined first benchmark quantity.The first benchmark quantity is set to following bad spray The quantitative range of mouth: by the nozzle using surrounding to not augmented from bad nozzle discharge ink, image quality can be declined Be suppressed to almost can not visual confirmation to record image in the undesirable degree of the image quality as caused by bad nozzle, it is preferred that In order to reduce the frequency of service action, which is set as bigger value.
In addition, maintenance beginning condition related with the configuration of bad nozzle can be set to: continued presence is more than regulation The second benchmark quantity bad nozzle, also, send out nozzle bad after including in these bad nozzles.Here, the second benchmark Quantity is set to the continuous quantitative range of following bad nozzle: by being augmented using the nozzle of surrounding to not from multiple adjacent Bad nozzle discharge ink augmented, can by image quality decline be suppressed to almost can not visual confirmation to record image in The image quality as caused by bad nozzle is bad.
In above-mentioned service action, the second empty injection be moved in head unit 20 it is opposed with the ink incorporating section of maintenance department 42 Position in the state of, pass through and ink be discharged from each nozzle 221 to carry out.Time of ink discharging operation in second empty injection Number is not particularly limited, can be identical as the above-mentioned first empty injection, is set as 1000 times or so.
Here, ink is discharged from all nozzles comprising bad nozzle in the second empty injection.This is because even if Ink or ink mist is caused to pollute ink discharge face 222 from bad nozzle discharge ink in second empty injection, it also can be in the second sky It is wiped after injection and cleaning ink discharge face 222.The control action of the second empty injection in ink-jet recording apparatus 1 is in addition to right Bad nozzle is also supplied with driving signal and is discharged other than ink this point, all identical as the control action of the first empty injection.
In service action, in the second empty AEI After End of Injection, wiped.In the wiping, head unit 20, which is moved to, matches It is equipped with the defined cleaning position of clearer 421, and clearer 421 is made to be moved to the ink of clearer 421 Yu head unit 20 Discharge face 222 abuts.Since the state, according to the movement of the rotation motor of maintenance department 42 and conveying motor, make clearer 421 It is connected to ink discharge face 222, while so that it is ined X direction while rotating and moving, thus using clearer 421 is wound in The wiper of outer peripheral surface wipes entire ink and face 222 is discharged, and removes the opening portion for being attached to ink discharge face 222 and nozzle 221 Ink and foreign matter.
The service action of present embodiment is that nozzle opening caused by the spray nozzle clogging and pollution of generation is sent out after eliminating Portion's blocking, so generally, it is possible to sending out nozzle bad after being using the nozzle that the service action is restored to normal condition, initially not Good nozzle is seldom restored to normal condition.
Then, the display for the head unit replacement information for supervising replacement head unit 20 is illustrated.
In ink-jet recording apparatus 1, after having carried out above-mentioned service action, in the record for carrying out usual image next time Before, the detection of bad nozzle is carried out based on the inspection result in inspection portion 43.Thus detect rear to send out nozzle bad be to pass through dimension Shield movement does not return to the rear of normal condition and sends out nozzle bad (hereinafter also referred to send out bad afterwards fixed nozzle).In ink-jet record In device 1, in each head unit 20 this it is rear send out the quantity of fixed nozzle bad and rear in the head unit 20 to send out bad solid In the case where determining at least one party's satisfaction rated condition identical with the condition of above-mentioned beginning service action in the configuration of nozzle, benefit Being shown with operation display part 44 indicates that head unit 20 is in the head unit in replacement period and replaces information, so that user be supervised to replace head Unit 20.
It should be noted that can also consider initial bad nozzle on the basis of the rear quantity and configuration for sending out fixed nozzle bad Quantity and configuration, be based on this condition to determine whether replacement head unit 20.
Then, the image recording processing executed in ink-jet recording apparatus 1 is illustrated.
Fig. 8 is the flow chart for indicating the control sequence of image recording processing.
The picture number for being recorded in the usual image of recording medium M is being supplied via input/output interface 45 from external device (ED) 2 It accordingly and indicates in the case where recording the print out task of the usual image and being stored in the second storage unit 34, starts the image Record processing.
After starting image recording processing, control unit 30 judges whether the second storage unit 34 is stored with the printing being not carried out and appoints It is engaged in (step S101).In the case where being judged as that the second storage unit 34 does not store the print out task being not carried out (in step S101 In be "No"), control unit 30 terminate image recording processing.
In the case where being judged as that the second storage unit 34 is stored with the print out task being not carried out (in step s101 for "Yes"), control unit 30 judges whether to meet bad nozzle detection beginning condition (step S102).Here, for example being carried out finally After the detection (step S103) of bad nozzle, in the feelings for the image recording movement for having carried out stipulated number or more using head unit 20 Under condition, control unit 30, which is judged as, meets bad nozzle detection beginning condition.
Meet (being in step s 102 "Yes") in the case that bad nozzle detects beginning condition, control unit 30 being judged as Carry out the detection (step S103) of bad nozzle.That is, control unit 30 makes the motor action of head unit moving portion 41 and makes head unit 20 is mobile to ﹢ Z-direction, and is moved to inspection portion 43 between head unit 20 and conveyer belt 13.Also, control unit 30 and head control Portion 21 processed is and from the head driving portion 22a of record head 22 to recording element output drive signal from the nozzle 221 of recording element Ink is discharged.Here, the number for the ink discharge that control unit 30 and head control unit 21 are carried out from each nozzle 221 is for several times to tens of It is secondary or so, inhibit the pollution in ink discharge face completely or greatly as a result,.In addition, matchingly with ink discharge, control unit 30 makes The motor 436 in inspection portion 43 acts and keeps mobile unit 433 mobile, and makes illumination region 431 with ink discharge timing synchronization And acceptance part 432 acts and obtains the detection signal of the light exported from acceptance part 432.Control unit 30 is based on the detection letter got It sends out nozzle bad after number detection, generates bad nozzle data D2 and store and (covered in the case where having bad nozzle data D2 Storage) in the second storage unit 34.
Control unit 30 judges whether to meet maintenance beginning condition (step S104).Here, by bad nozzle data D2 institute In the case that the quantity of the bad nozzle shown is greater than the first benchmark quantity, control unit 30 is judged as the quantity met with bad nozzle Related maintenance beginning condition.In addition, indicating that continued presence is more than the quantity of the second benchmark quantity in bad nozzle data D2 In the case where bad nozzle, control unit 30, which is judged as, meets maintenance beginning condition related with the configuration of bad nozzle.
Be judged as be unsatisfactory for maintenance beginning condition in the case where (in step S104 for "No"), or in step S102 In be judged as be unsatisfactory for bad nozzle detection beginning condition in the case where (being in step s 102 "No"), the judgement of control unit 30 appoints Whether one head unit 20 has bad nozzle (step S105).
Be judged as any head unit 20 have bad nozzle in the case where (being in step s105 "Yes"), control unit 30 are based on bad nozzle data D2 image correcting data (step S106).That is, control unit 30 is referring to bad nozzle data D2, with not From bad nozzle discharge ink mode and by not from bad nozzle discharge ink augment in a manner of, correction with beat The image data of the related usual image of print task is simultaneously stored in the second storage unit 34.
Control unit 30 is based on corrected image data in step s 106, starts image recording related with print out task Movement.
That is, the conveying that control unit 30 starts the recording medium M carried out by delivery section 10 acts.In addition, if empty injection is opened Beginning position is moved to the ink drain position of each head unit 20, then control unit 30 and head control unit 21 are using in each head unit 20 The empty jeting areas 52 of 221 pairs of each nozzle in addition to bad nozzle carry out the first empty injection (step S107: empty injecting step). In addition, control unit 30 and head control unit 21 are moved to the ink drain position of each head unit 20 in the record area of usual image 51 At the time of, start that ink is discharged from nozzle 221 based on the image data after correction, to record usually figure on recording medium M As 51 (step S108).
It should be noted that (in step in the case where being judged as all head unit 20 all without bad nozzle in step s105 It is "No" in rapid S105), control unit 30 does not correct image data related with print out task, but is based on the Imagery Data Recording Usual image 51.
After the record end of a usual image 51, control unit 30 judges all usual figures indicated by print out task As whether 51 record is all over (step S109), there are Unrecorded usual image 51, make to handle into Enter step S107 (being "No" in step S109), in the case where the record of all usual images 51 is all over, makes Processing enters step S101 (being "Yes" in step S109).
In the case where being judged as satisfaction maintenance beginning condition in step S104 (being "Yes" in step S104), control unit 30 judge to safeguard whether complement mark is set to close (step S110).
Be judged as maintenance complement mark be set to close in the case where (being in step s 110 "Yes"), control unit into Service action as defined in row.That is, control unit 30 makes head unit moving portion 41 act and be moved to head unit 20 and maintenance department 42 The opposed position in ink incorporating section.Then, control unit 30 and head control unit 21 comprising bad nozzle from existing in head unit 20 Interior whole nozzles are discharged ink to ink incorporating section and carry out the second empty injection (step S111: empty injecting step).Second Empty AEI After End of Injection, it is mobile to defined cleaning position that control unit 30 makes head unit 20, and make maintenance department 42 rotation motor and It conveys motor action and is wiped (step S112) using clearer 421.
In the after treatment of step S112, control unit 30 will safeguard that complement mark is set as opening (step S113).? The after treatment of step S113, control unit 30 make processing enter step S103.
Be judged as in step s 110 maintenance complement mark be set to open in the case where (in step s 110 for "No"), control unit 30 makes operation display part 44 carry out the display (step S114) that head unit replaces information.
In the after treatment of step S114, control unit 30 makes image recording, and processing terminate.
In the processing of above-mentioned image recording, the control and control unit 30 of step S107 and the empty injection of progress in step S111 and The empty injection control of head control unit 21 is corresponding.
(variation 1)
Then, the variation of above embodiment 1 is illustrated.The difference of this variation and above embodiment It is: only carries out the detection of bad nozzle after just having carried out service action.Other aspects are identical as above embodiment.
Fig. 9 is the flow chart for indicating the control sequence of image recording processing of this variation.At image recording shown in Fig. 9 Reason is that step S102 is changed to step S115 in the image recording processing of above embodiment shown in Fig. 8, is changed to Implementation steps S111 and step S112 before step S103, and delete step S110 and step S113.Hereinafter, with shown in Fig. 8 Image recording processing difference centered on be illustrated.
In the after treatment of step S101, control unit 30 judges whether that meeting initial maintenance starts condition (step S115).Here, head unit 20 is consumed because recording image after finally carrying out service action (step S111 and step S112) In the case where the above ink of specified amount, control unit 30 is judged as that meeting initial maintenance starts condition.It is unsatisfactory for initially being judged as In the case where maintenance beginning condition (being in step sl 15 "No"), control unit 30 makes processing enter step S105.
In the case where being judged as that meeting initial maintenance starts condition (being in step sl 15 "Yes"), control unit 30 is carried out Service action (step S111 and step S112).In the after treatment of step S112, control unit 30 carries out the inspection of bad nozzle It surveys (step S103).In addition, being judged as the case where meeting maintenance beginning condition in the step S104 carried out after step S103 Under (in step S104 be "Yes"), control unit 30 makes operation display part 44 carry out the display (step of head unit replacement information S114)。
This image recording processing according to this modification, because only carrying out bad nozzle after just having carried out service action Detection, so being able to suppress the execution frequency of the detection of bad nozzle.
(variation 2)
Then, the variation of above embodiment 2 is illustrated.
This variation and above embodiment the difference is that: do not arranged from initial bad nozzle in the second empty injection Ink out.Because initial bad caused by initial bad nozzle is the unfavorable condition in the manufacturing process as recording element Nozzle from because nozzle opening portion blocking etc. then sends out that the bad nozzle of generation is different, by it is empty spray revert to normal nozzles can Energy property is very low.In view of this point, in this variation, ink is not discharged from initial bad nozzle in the second empty injection, as a result, Reduce the consumption of ink caused by empty spray.
Because initial bad nozzle be also in the operation of recording of the first empty injection and various images do not use (without Ink discharging operation), so the initial bad nozzle of this variation does not all use always, it is treated as fixed (can not restore ) bad nozzle.Therefore, in this variation, initial bad nozzle can be rejected to other than the test object of bad nozzle.
As described above, the ink-jet recording apparatus 1 of present embodiment has: face 222 is discharged with ink in head unit 20, Ink discharge face 222 is provided with the opening portion of the nozzle 221 of discharge ink；Control unit 30 and (the empty injection control of head control unit 21 Mechanism), be not based on the image data of the usual image 51 of record object and controlled from the empty injection that ink is discharged in nozzle 221 System；First storage unit 23 and the second storage unit 34 (storage unit) store and the abnormal discharge ink in nozzle 221 respectively The related initial bad nozzle data D1 and bad nozzle data D2 of bad nozzle；In empty injection control, control unit 30 and head Control unit 21 is able to select whether 221 row of nozzle for being determined as bad nozzle according to bad nozzle data D2 from nozzle 221 Ink (empty injection control mechanism) out.
As a result, in empty injection control, by ink not being discharged from bad nozzle as needed, it is able to suppress from bad spray The ink or ink mist that mouth is discharged extremely are attached to ink discharge face 222 and ink discharge face 222 are caused to be polluted.As a result, energy It is enough to inhibit to generate following unfavorable condition: be attached under the ink in ink discharge face 222 fall on recording medium M, conveyer belt 13 and produce Life be stained, or be attached to ink discharge face 222 ink be solidified as plug nozzle opening portion a part state and generate New bad nozzle.
In addition, ink-jet recording apparatus 1 has detection ink from the inspection portion 43 of the discharge state of nozzle 221, control unit 30 Determine bad nozzle according to the testing result in inspection portion 43, and the definitive result based on the bad nozzle is by bad nozzle data D2 is stored in the second storage unit 34 (bad nozzle determines mechanism).It through this structure, can be based on ink from nozzle 221 Discharge state accurately determines bad nozzle.In addition, by referring to the bad nozzle number of the testing result based on the bad nozzle The bad nozzle in empty injection control without ink discharge is determined according to D2, is able to carry out the inspection of the nearest bad nozzle of reflection Survey the empty injection control appropriate of result.For example, for being determined as bad nozzle in the past but according to the inspection of nearest bad nozzle Survey result judgement be the nozzle for reverting to normal nozzles, can make in empty injection control its be discharged ink and inhibit its again at For bad nozzle.In addition, the nozzle for being newly determined as bad nozzle according to the testing result of nearest bad nozzle, in The only ink discharge in empty injection control can be reliably suppressed ink discharge face 222 and pollute.
In addition, in the case where meeting rated condition, control unit 30 and the selection of head control unit 21 are not in empty injection control Ink (empty injection control machine is discharged from the nozzle 22 for being determined as bad nozzle according to bad nozzle data D2 in nozzle 221 Structure).Stopped that ink is discharged from bad nozzle according to predetermined condition as a result, ink discharge face 222 can be effectively inhibited Pollution, while the generation of bad nozzle caused by inhibiting empty and spraying and realizing recovery from bad nozzle.
In addition, the case where and then carrying out the record of usual image 51 after carrying out ink discharge by empty injection control Under, control unit 30 and head control unit 21, which are judged as, meets above-mentioned rated condition (empty injection control mechanism).Thereby, it is possible to utilize suppression It has made the head unit 20 that ink discharge face 222 is polluted and has recorded usual image 51.As a result, the record in usual image 51 is constituted In, it is able to suppress the generation that the unfavorable condition on recording medium M is fallen under the ink for being attached to ink discharge face 222.
In addition, ink-jet recording apparatus 1 has the clearer 421 in cleaning ink discharge face 222, control unit 30 utilizes clearer 421 carry out the cleaning action (cleaning control mechanism) in inks discharge faces 222, after carrying out ink discharge by empty injection control and Carry out in the case where carrying out the record of usual image 51 before cleaning action, control unit 30 and head control unit 21 be judged as meet it is above-mentioned Rated condition (empty injection control mechanism).It is logical thereby, it is possible to be recorded using the head unit 20 for inhibiting ink discharge face 222 to pollute Normal image 51.As a result, being able to suppress the ink for being attached to ink discharge face 222 in the recording process of usual image 51 Under fall on the generation of unfavorable condition on recording medium M.
In addition, in empty injection control, outside the record area of the usual image 51 from nozzle 221 into recording medium M In the case where ink is discharged, control unit 30 and head control unit 21, which are judged as, meets above-mentioned rated condition (empty injection control mechanism). It accordingly, can be by head unit 20 in the case where persistently carrying out the record of empty injection and usual image 51 on same record medium M Ink discharge face 222 maintain inhibit pollution state.As a result, can press down in the recording process of usual image 51 System is attached to the generation that the unfavorable condition on recording medium M is fallen under the ink in ink discharge face 222.
In addition, control unit 30 and head control unit 21 are able to carry out different a variety of empty injection control (first and second sky sprays Penetrate), in the case where carrying out defined empty injection control (the first empty injection) in a variety of empty injection controls, it is judged as satisfaction Above-mentioned rated condition (empty injection control mechanism).As a result, at the pollution unquestioned moment in ink discharge face 222, in sky Ink is discharged from bad nozzle in injection control, bad nozzle can be made to revert to normal nozzles.
In addition, the first storage unit 23 storage initially bad nozzle data D1 related with initial bad nozzle, this first is deposited Storage portion 23 is wholely set with head unit 20.Bad spray as a result, in the case where replacing head unit 20, without the head unit 20 The detection of mouth, it will be able to determine bad nozzle (that is, initial bad nozzle) possessed by the head unit 20.
In addition, bad nozzle data D2 includes with head unit 20 with the related letter of initial undesirable initial bad nozzle Breath, in empty injection control, control unit 30 and the selection of head control unit 21 be not from true according to information related with initially bad nozzle It is set to nozzle discharge ink (empty injection control mechanism) of initial bad nozzle.Thereby, it is possible to avoid from reverting to normal nozzles A possibility that lower initial bad nozzle ink is discharged, so as to inhibit the consumption of ink.
In addition, the ink discharge control method of the ink-jet recording apparatus 1 of above embodiment includes to be not based on record object Usual image 51 image data and from nozzle 221 be discharged ink empty injecting step, in empty injecting step, meet advise In the case where fixed condition, the nozzle 221 for being determined as bad nozzle according to bad nozzle data D2 from nozzle 221 is chosen whether Ink is discharged.As a result, in empty injecting step, by without ink is discharged from bad nozzle, being able to suppress never as needed The ink or ink mist of good nozzle discharge are attached to ink discharge face 222 and ink discharge face 222 are caused to be polluted.
It should be noted that present invention is not limited to the embodiments described above and each variation, it is able to carry out various changes.
For example, as service action, utilizing the empty injection of progress second and wiping in above embodiment and each variation Example be illustrated, but in service action, also can replace the second empty injection, or on the basis of the second empty injection On, carry out the pressurization cleaning that discharge ink is forced from nozzle 221.In the case where carrying out pressurization cleaning, as long as in maintenance department 42 Force (forcing) pump, and the defined pressurization using force (forcing) pump in the feed path for the ink that the pressure chamber with recording element is connected to are set It pressurizes to ink position.By ink forcibly being discharged from the nozzle 221 of recording element and disappears to the ink pressurization Except the blocking of nozzle 221.Pressurization cleaning be head unit 20 ink discharge face 222 it is opposed with ink incorporating section in the state of into Capable.
Alternatively, it is also possible to which after and then pressurization cleaning is wiped, further progress sky sprays.In this case, exist After sky injection, before the operation of recording of usual image 51, the wiping in face 222 is usually discharged without ink, so in order not to It pollutes ink and face 222 is discharged, preferably do not carry out ink discharge from bad nozzle in sky injection.
In addition, as the example of empty injection control, enumerating the empty spray of progress first in above embodiment and each variation The empty injection control penetrated and the empty injection control for carrying out the second empty injection are illustrated, and the first empty injection is from normal nozzles to note Region other than the record area of usual image 51 on recording medium M is discharged ink, and the second empty injection is from whole nozzles to ink Ink is discharged in incorporating section, but not limited to this.For example, empty injection control can also proceed as follows empty injection: usually scheming As 51 recording process in into the record area of usual image 51 it is a small amount of to be unable to the frequency discharge for the degree that visual confirmation arrives Ink.In sky injection, because the ink discharge face 222 of head unit 20 is the state opposed with recording medium M, in order to The ink for preventing ink to be attached to ink discharge face 222 and adhere to is fallen on recording medium M, is not preferably carried out from bad nozzle Ink discharge.
On the basis of these sky injection controls, or replace these sky injection controls, can also carry out beginning condition, The ink discharge number of each nozzle 221, for ink discharge driving signal, be discharged ink object etc. at least part that This different a variety of empty injection control.In these a variety of empty injection controls, the ink being discharged from bad nozzle will not Cause or slightly cause ink discharge face 222 pollute empty injection control and later cleaning ink be discharged face 222 at the time of In the empty injection control for carrying out ink discharge, ink discharge is carried out from whole nozzles 221, in defined empty injection in addition to this In control, ink discharge is not carried out from bad nozzle, so as to inhibit the pollution in ink discharge face 222.
In above embodiment and each variation, using the first storage unit 23 is set in each head unit 20 and store with The example of the related initially bad nozzle data D1 of initial bad nozzle is illustrated, and however, you can also not set in head unit 20 Set the first storage unit 23, but the storage of the second storage unit 34 of control unit 30 and initially bad nozzle and after send out nozzle bad and have The bad nozzle data D2 closed.In this case, as long as detecting initial bad nozzle when replacing head unit 20 and updating bad Nozzle data D2.Alternatively, can also be related with initial bad nozzle based on what is detected in advance by external detection device Information generate bad nozzle data D2 and be stored in the second storage unit 34.
In addition, in above embodiment and each variation, using inspection portion 43 measure light quantity as reflect ink from The physical quantity of the discharge state of nozzle 221, and the example for sending out nozzle bad after determining according to the measurement result is illustrated, but It is without being limited thereto.For example, it is also possible to defined check image be recorded to recording medium M, by utilization linear transducer or region Image reading unit as sensor shoots photographed data obtained by the check image and is parsed to determine bad nozzle.? This, it is specified that check image for example can be as utilizing the ink that multiple nozzles 221 possessed by the head unit 20 are discharged respectively The line pattern that a plurality of line of record is constituted.The line pattern is being shot in the photographed data that obtains, there are the line of defect or is being deposited It, can be true by nozzle 221 corresponding to the line in the case where being not recorded in the line of appropriate location corresponding with nozzle 221 It is set to bad nozzle.
Alternatively, it is also possible to be carried out using comprising each nozzle including bad nozzle before bad nozzle is detected in inspection portion 43 Sky injection.Thereby, it is possible to inhibit to be easy to restore to be judged as bad nozzle to the nozzle of normal condition.In this case, it is desirable to Face 222 is discharged by wiped clean ink after sky injection and before detecting bad nozzle, but the ink discharge in empty injection Number enough less equal inks discharge face 222 will not be contaminated or slightly contaminated situation under, also can be omitted wiping.
In addition, enumerating clearer 421 as the clear of cleaning ink discharge face 222 in above embodiment and variation Clean portion is illustrated, but the structure of cleaning section is without being limited thereto, such as is also possible to different on ink discharge face 222 with wiping off The cleaning section of the scraper plate of object and ink etc..
In addition, enumerating and remembering to the recording medium M of the length rolled out from reel in above embodiment and variation The example of record is illustrated, but not limited to this.For example, recording medium is not limited to the recording medium rolled out from reel, such as It is also possible to the recording medium rolled out from folding state.In addition, recording medium is also possible to the short record such as sheet-fed Medium.
In addition, using the conveying record of delivery section 10 by having conveyer belt 13 in above embodiment and each variation The example of medium M is illustrated, but not limited to this, recording medium M can also be for example maintained at the defeated of rotation by delivery section 10 It send and is conveyed on bulging outer peripheral surface.
In addition, enumerating the example of the ink-jet recording apparatus 1 of single pass form in above embodiment and each variation It is illustrated, but also the present invention can be applied to the ink-jet record dresses that image recording is carried out while scanning record head It sets.
Several embodiments of the invention are described, but the scope of the present invention is not limited to above embodiment, packet The invention scope recorded containing claims and the range being equal with it.
Industrial applicibility
The present invention can be applied to the ink discharge control method of ink-jet recording apparatus and ink-jet recording apparatus.
Description of symbols
1 ink-jet recording apparatus
2 external device (ED)s
10 delivery sections
11 driven rollers
12 driven vollers
13 conveyer belts
20 head units
21 control units
21a control circuit
21b switching part
21c image data storing section
22 record heads
22a driving portions
221 nozzles
Face is discharged in 222 inks
23 first storage units
30 control units
31 CPU
32 RAM
33 ROM
34 second storage units
41 head unit moving portions
42 maintenance departments
421 clearers
43 inspection portions
431 illumination regions
432 acceptance parts
433 mobile units
434 mobile bands
435a, 435b roller
436 motors
437 linear encoders
44 operation display parts
45 input/output interfaces
46 buses
51 usual images
52 empty jeting areas
52Y, 52M, 52C, 52K color separation sky spray image
The initial bad nozzle data of D1
The bad nozzle data of D2
The image data of the usual image of Da
Data are used in the injection of Db sky
L optical axis
M recording medium

Claims (10)

1. a kind of ink-jet recording apparatus, which is characterized in that have:
Face is discharged with ink in ink discharge unit, and ink discharge face is provided with the opening portion of the nozzle of discharge ink；
Empty injection control mechanism be not based on the image data of the image of record object and ink is discharged from the nozzle Empty injection control；
Storage unit, the related bad nozzle information of bad nozzle of storage and the abnormal discharge ink in the nozzle；
In the empty injection control, the sky injection control mechanism is able to select whether from the nozzle according to described bad Nozzle information is determined as the nozzle discharge ink of bad nozzle.
2. ink-jet recording apparatus as described in claim 1, which is characterized in that have:
State detecting section is discharged, detects discharge state of the ink from the nozzle；
Bad nozzle determines mechanism, determines bad nozzle according to the testing result of the discharge state detecting section, and being based on should The bad nozzle information is stored in the storage unit by the definitive result of bad nozzle.
3. ink-jet recording apparatus as claimed in claim 1 or 2, which is characterized in that
In the empty injection control, in the case where meeting rated condition, sky injection control mechanism selection is not from described Ink is discharged according to the nozzle that the bad nozzle information is determined as bad nozzle in nozzle.
4. ink-jet recording apparatus as claimed in claim 3, which is characterized in that
In the case where and then carrying out image recording after ink is discharged by the empty injection control, the sky injection control machine Structure, which is judged as, meets the rated condition.
5. ink-jet recording apparatus as described in claim 3 or 4, which is characterized in that have:
Cleaning section cleans the ink and face is discharged；
Control mechanism is cleaned, the cleaning action in ink discharge face is carried out using the cleaning section；
After ink is discharged by the empty injection control and in the case where carrying out carrying out image recording before the cleaning action, institute Shu Kong injection control mechanism, which is judged as, meets the rated condition.
6. the ink-jet recording apparatus as described in any one of claim 3 to 5, which is characterized in that
In the empty injection control, in the case where the image-recording region outlet from nozzle to recording medium goes out ink, institute Shu Kong injection control mechanism, which is judged as, meets the rated condition.
7. the ink-jet recording apparatus as described in any one of claim 3 to 6, which is characterized in that
The sky injection control mechanism is able to carry out different a variety of empty injection controls, is carrying out a variety of empty injection controls In defined empty injection control in the case where, the sky injection control mechanism, which is judged as, meets the rated condition.
8. the ink-jet recording apparatus as described in any one of claims 1 to 7, which is characterized in that
The bad nozzle information includes related just with initial undesirable initial bad nozzle with the ink discharge unit Begin bad nozzle information,
The storage unit has the initial bad nozzle information storage unit for storing the initial bad nozzle information,
The initial bad nozzle information storage unit is wholely set with the ink discharge unit.
9. such as ink-jet recording apparatus described in any item of the claim 1 to 8, which is characterized in that
The bad nozzle information includes related just with initial undesirable initial bad nozzle with the ink discharge unit Begin bad nozzle information,
In the empty injection control, sky injection control mechanism selection is not determined from according to the initial bad nozzle information Ink is discharged in nozzle for initial bad nozzle.
10. control method is discharged in a kind of ink of ink-jet recording apparatus, which is characterized in that
The ink-jet recording apparatus has: ink discharge unit, face is discharged with ink, ink discharge face is provided with discharge ink The opening portion of the nozzle of water；Storage unit stores related bad with the bad nozzle of discharge ink abnormal in the nozzle Nozzle information；
The ink-jet recording apparatus ink discharge control method include be not based on record object image image data and from The empty injecting step of the nozzle discharge ink,
In the empty injecting step, choose whether to be determined as bad nozzle according to the bad nozzle information from the nozzle Nozzle be discharged ink.
CN201780077145.3A 2016-12-16 2017-11-08 Control method is discharged in the ink of ink-jet recording apparatus and ink-jet recording apparatus Pending CN110087888A (en)

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JP2016243865 2016-12-16
JP2016-243865 2016-12-16
PCT/JP2017/040177 WO2018110153A1 (en) 2016-12-16 2017-11-08 Inkjet recording device and ink discharge control method of inkjet recording device

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CN110087888A true CN110087888A (en) 2019-08-02

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JP (1) JP6988825B2 (en)
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EP3556561A1 (en) 2019-10-23
JP6988825B2 (en) 2022-01-05
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EP3556561A4 (en) 2019-12-04
EP3556561B1 (en) 2022-08-17

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