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WO2023163181A1 - Procédé de détection de liquide et dispositif d'évacuation de liquide - Google Patents

Procédé de détection de liquide et dispositif d'évacuation de liquide Download PDF

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Publication number
WO2023163181A1
WO2023163181A1 PCT/JP2023/007115 JP2023007115W WO2023163181A1 WO 2023163181 A1 WO2023163181 A1 WO 2023163181A1 JP 2023007115 W JP2023007115 W JP 2023007115W WO 2023163181 A1 WO2023163181 A1 WO 2023163181A1
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WO
WIPO (PCT)
Prior art keywords
liquid
ejection surface
observation
head
ejection
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.)
Ceased
Application number
PCT/JP2023/007115
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English (en)
Japanese (ja)
Inventor
喜裕 由宇
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.)
Kyocera Corp
Original Assignee
Kyocera Corp
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 Kyocera Corp filed Critical Kyocera Corp
Priority to JP2024503293A priority Critical patent/JP7776611B2/ja
Publication of WO2023163181A1 publication Critical patent/WO2023163181A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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

Definitions

  • the disclosed embodiments relate to a liquid detection method and a liquid ejection device.
  • liquid ejection devices Inkjet printers and inkjet plotters using an inkjet recording method are known as liquid ejection devices.
  • a liquid ejection head for ejecting liquid is mounted in such an inkjet type liquid ejection apparatus.
  • the liquid ejection head has an ejection surface through which a plurality of ejection holes for ejecting liquid are opened.
  • a liquid detection method includes an irradiation process, an observation process, and a detection process.
  • a light source obliquely irradiates an ejection surface of a head having an ejection surface in which a plurality of ejection holes for ejecting liquid are opened.
  • the observation step observes the irradiated ejection surface with an observation device.
  • the detecting step the presence or absence of leakage of liquid from the ejection surface is detected based on the observation result of the observation device.
  • FIG. 1 is a plan view schematically showing the configuration of the liquid ejection device according to the embodiment.
  • FIG. 2 is a side view of the liquid ejection device shown in FIG. 1 as seen from the Y-axis negative direction.
  • FIG. 3 is a side view of the liquid ejection device shown in FIG. 1 as seen from the positive direction of the X-axis.
  • FIG. 4 is a perspective view schematically showing the external configuration of the head according to the embodiment.
  • FIG. 5 is a plan view of the head according to the embodiment.
  • FIG. 6 is a diagram schematically showing flow paths inside the head according to the embodiment.
  • FIG. 7 is a flow chart showing a processing procedure of liquid detection processing using the liquid ejection device according to the embodiment.
  • FIG. 8 is a diagram showing a specific example of the detection process according to the embodiment.
  • FIG. 9 is a diagram showing an example of experimental results showing the relationship between the irradiation angle of light with which the ejection surface is irradiated and the visibility of the ejection surface.
  • Each drawing referred to below shows an orthogonal coordinate system in which the X-axis direction, the Y-axis direction, and the Z-axis direction are defined to be orthogonal to each other, and the Z-axis positive direction is the vertically upward direction, in order to make the explanation easier to understand.
  • FIG. 1 is a plan view schematically showing the configuration of the liquid ejection device according to the embodiment.
  • FIG. 2 is a side view of the liquid ejection device shown in FIG. 1 as seen from the Y-axis negative direction.
  • FIG. 3 is a side view of the liquid ejection device shown in FIG. 1 as seen from the positive direction of the X-axis.
  • the liquid ejecting apparatus 1 ejects liquid onto the recording medium M by an inkjet method, thereby printing images, characters, and the like on the recording medium M.
  • the recording medium M is, for example, cloth or paper.
  • the liquid ejection device 1 has a transport section 2 , a carriage 3 and a head 4 .
  • the transport unit 2 transports the recording medium M in the transport direction (here, the positive direction of the X axis).
  • the transport unit 2 may include a delivery roller that delivers the recording medium M before printing and a take-up roller that takes up the recording medium M after printing.
  • the take-up roller is provided with a motor that rotates the take-up roller about its axis and causes the recording medium M to be taken up.
  • the transport unit 2 may include a tension roller that applies tension to the recording medium M and a transport roller that generates a transport force to intermittently feed the recording medium M, etc., on the transport path between the delivery roller and the take-up roller. .
  • the carriage 3 is mounted on a pair of guide rails (not shown) extending along a scanning direction (here, the positive direction of the Y axis) that intersects (perpendicularly in the embodiment) the conveying direction of the recording medium M (the positive direction of the X axis). Supported.
  • a pair of guide rails is provided, for example, so as to extend laterally (here, in the Y-axis negative direction) with respect to the conveying path of the recording medium M.
  • a position between a pair of guide rails on the side of the transport path of the recording medium M is a maintenance position where maintenance processing of the head 4 is performed.
  • the carriage 3 is movable along the pair of guide rails.
  • the head 4 positioned inside the carriage 3 can move together with the carriage 3 between an ejection position for ejecting liquid onto the recording medium M and a maintenance position.
  • the carriage 3 and head 4 positioned at the ejection position are indicated by two-dot chain lines, and the carriage 3 and head 4 positioned at the maintenance position are indicated by solid lines.
  • the head 4 is a so-called circulation type liquid ejection head that ejects liquid while circulating the liquid inside.
  • the head 4 has an ejection surface 4s (see FIGS. 2 and 3) through which a plurality of ejection holes for ejecting liquid are opened.
  • a liquid such as ink is supplied to the head 4 from a circulation device (not shown).
  • This circulation device supplies the liquid to the head 4 while controlling the circulation pressure of the liquid circulating between the heads 4 .
  • the head 4 and circulation device are arranged inside the carriage 3 .
  • a part of the circulation device (for example, a tank or the like) may be arranged outside the carriage 3 .
  • the head 4 is formed, for example, in a substantially rectangular parallelepiped shape.
  • the head 4 is positioned such that its longitudinal direction is orthogonal to the transport direction of the recording medium M (X-axis positive direction).
  • the liquid ejecting apparatus 1 includes a light source 5, an observation device 6, a first rail 7, a second rail 8, a first moving member 9, a second moving member 10, a first supporting member 11, and a second support member 12 .
  • a light source 5 an observation device 6, a first rail 7, a second rail 8, a first moving member 9, a second moving member 10, a first supporting member 11, and a second support member 12 .
  • the carriage 3 and head 4 are positioned at the maintenance position.
  • the light source 5 is mounted on the first moving member 9 while being supported by the first supporting member 11 .
  • the light source 5 is positioned to the side of the head 4 in plan view.
  • the light source 5 irradiates the ejection surface 4s of the head 4 with light from an oblique direction.
  • the light source 5 emits light along the lateral direction (X-axis direction) of the head 4 in plan view.
  • the light source 5 irradiates the ejection surface 4s with light having a wavelength within the range of 460 nm or more and 620 nm or less, which maximizes the light intensity.
  • a Polarion light can be used as the light source 5.
  • the observation device 6 is supported by the second support member 12 and mounted on the second moving member 10 .
  • the observation device 6 is positioned below the ejection surface 4s of the head 4, as shown in FIGS.
  • the observation device 6 can observe the ejection surface 4s irradiated with light.
  • the observation device 6 is a reflecting mirror that reflects the ejection surface 4s.
  • a mirror image (an example of the first observation result) of the ejection surface 4s reflected on the observation device 6, which is a reflecting mirror, is provided to the observer O as the observation result. Accordingly, the observer O can detect the presence or absence of liquid leakage from the ejection surface 4s based on the result of observation of the ejection surface 4s by the observation device 6, that is, the mirror image of the ejection surface 4s.
  • the light source 5 irradiates the ejection surface 4 s with light from an oblique direction
  • the observation device 6 observes the ejection surface 4 s irradiated with the light. Visibility of the ejection surface 4s can be improved. Accordingly, the observer O can detect the presence or absence of leakage of liquid from the ejection surface 4s according to the presence or absence of the shadow of the liquid that has leaked from the ejection surface 4s. It can be easily distinguished from the mist-like deposits adhering to the surface 4s. Therefore, according to the liquid ejecting apparatus 1 according to the embodiment, it is possible to accurately detect whether or not the liquid leaks from the ejection surface 4s.
  • the mirror image of the ejection surface 4s reflected on the observation device 6, which is a reflector is an observation position that does not overlap the path of the light applied to the ejection surface 4s and the path of the reflected light from the ejection surface 4s in plan view. provided towards.
  • the light source 5 emits light along the lateral direction (X-axis direction) of the head 4 in plan view
  • the mirror image of the ejection surface 4s is the longitudinal direction (X-axis direction) of the head 4 in plan view.
  • Y-axis direction) is provided toward the observation position (the position of the observer O in FIG. 3).
  • the observer O at the observation position can view the ejection surface without being blocked by the light irradiated on the ejection surface 4s and the reflected light from the ejection surface 4s. A mirror image of 4s can be seen.
  • the first rail 7 and the second rail 8 are arranged in the lateral direction (X-axis direction) of the head 4 and extend along the longitudinal direction (Y-axis direction) of the head 4, as shown in FIG. do.
  • the first rail 7 and the second rail 8 are located at positions sandwiching the maintenance position (that is, the head 4 positioned at the maintenance position) in the lateral direction (X-axis direction) of the head 4 in plan view.
  • the first rail 7 is positioned on the X-axis negative direction side of the head 4 positioned at the maintenance position
  • the second rail 8 is positioned on the X-axis positive direction side of the head 4 positioned at the maintenance position.
  • the first moving member 9 is positioned on the first rail 7 and moves along the first rail 7 .
  • the second moving member 10 is positioned on the second rail 8 and moves along the second rail 8 .
  • the first moving member 9 and the second moving member 10 may be moved along the first rail 7 and the second rail 8 by driving devices such as motors.
  • the first moving member 9 and the second moving member 10 may move independently or integrally.
  • a light source 5 is mounted on the first moving member 9 via a first supporting member 11 .
  • the light source 5 can be moved along the first rail 7 in the longitudinal direction (Y-axis direction) of the head 4 together with the first moving member 9 . This makes it possible to freely change the position where the ejection surface 4s of the head 4 is irradiated with light.
  • the observation device 6 is attached to the second moving member 10 via the second supporting member 12 .
  • the observation device 6 By mounting the observation device 6 on the second moving member 10 , the observation device 6 can be moved along the second rail 8 in the longitudinal direction (Y-axis direction) of the head 4 together with the second moving member 10 . Thereby, the observed position of the ejection surface 4s can be freely changed. Note that the light source 5 and the observation device 6 may be moved together.
  • the first support member 11 is positioned on the first moving member 9 .
  • the first supporting member 11 rotatably supports the light source 5 via a first rotating shaft 11a, as shown in FIG.
  • the irradiation angle ⁇ of the light applied to the ejection surface 4s of the head 4 is changed. This makes it possible to freely adjust the irradiation angle ⁇ of light with which the ejection surface 4s of the head 4 is irradiated.
  • the first support member 11 may be configured to be expandable and contractable along the vertical direction (Z-axis direction).
  • the second support member 12 is positioned on the second moving member 10 . As shown in FIGS. 2 and 3, the second support member 12 rotatably supports the observation device 6 via a second rotation shaft 12a. By rotating the observation device 6 around the second rotation shaft 12a, the angle of the observation device 6 with respect to the ejection surface 4s of the head 4 is changed. Thereby, the angle of the observation device 6 with respect to the ejection surface 4s of the head 4 can be freely adjusted.
  • the second support member 12 may be configured to be expandable and contractable along the vertical direction (Z-axis direction).
  • the liquid ejection device 1 also has a control section 13 .
  • the control unit 13 is, for example, a CPU (Central Processing Unit), and controls the entire liquid ejecting apparatus 1 by reading and executing a program (not shown) stored in a storage unit (not shown).
  • a program not shown
  • a storage unit not shown
  • FIG. 4 is a perspective view schematically showing the external configuration of the head 4 according to the embodiment.
  • FIG. 5 is a plan view of the head 4 according to the embodiment.
  • FIG. 6 is a diagram schematically showing flow paths inside the head 4 according to the embodiment.
  • the head 4 has a housing including a box-shaped member 410 and a plate-shaped member 420 .
  • the housing of the head 4 has a first flow path RT1 for supplying liquid from an external circulation device to the inside of the head, and a second flow path for returning the liquid recovered inside the head to the circulation device.
  • RT 2 is installed.
  • the member 420 of the head 4 includes a supply port P in through which the liquid is supplied to the inside of the head through the first flow path RT- 1 , and a supply port Pin through which the liquid is supplied to the inside of the head through the second flow path RT- 2 . and an outlet P out through which the liquid is discharged.
  • the head 4 has a supply reservoir 401, a supply manifold 402, a recovery manifold 403, a recovery reservoir 404, and an element 405.
  • the supply reservoir 401 has an elongated shape extending in the longitudinal direction (Y-axis direction) of the head 4 and is connected to the supply manifold 402 .
  • Supply reservoir 401 has a channel therein. As shown in FIG. 5 or 6, the liquid is supplied to the supply reservoir 401 through the first flow path RT1 and the supply port P in , and stored in the flow path of the supply reservoir 401 is delivered to the supply manifold 402. .
  • the supply manifold 402 has an elongated shape extending to the front of the recovery reservoir 404 in the lateral direction (X-axis direction) of the head 4 .
  • the supply manifold 402 internally has a channel communicating with the channel of the supply reservoir 401 and the element 405 . As shown in FIG. 5 or 6 , liquid delivered from supply reservoir 401 to supply manifold 402 is delivered from supply manifold 402 to element 405 .
  • the collection manifold 403 has an elongated shape extending in the short direction (X-axis direction) of the head 4 to the front of the supply reservoir 401 .
  • the recovery manifold 403 internally has a channel that communicates with the channel of the recovery reservoir 404 and the element 405 . As shown in FIG. 5 or 6, the liquid that has not been discharged from the element 405 (discharge hole 405h) is sent to the recovery manifold 403. As shown in FIG.
  • the recovery reservoir 404 has an elongated shape extending in the longitudinal direction (Y-axis direction) of the head 4 and is connected to the recovery manifold 403 .
  • the collection reservoir 404 has a channel therein. As shown in FIG. 5 or 6, the liquid sent from the recovery manifold 403 to the recovery reservoir 404 and stored in the channel of the recovery reservoir 404 is discharged from the outside through the outlet Pout and the second channel RT2 . sent back to the circulator.
  • the element 405 has a discharge hole 405h.
  • the element 405 sucks the liquid from the supply manifold 402 by, for example, a negative pressure generated in a pressure chamber (not shown), and pushes the sucked liquid toward the recording medium M from the discharge hole 405h by a positive pressure generated in the pressure chamber (not shown). to dispense.
  • FIG. 7 is a flow chart showing a processing procedure of liquid detection processing using the liquid ejection device according to the embodiment.
  • the processing procedure (irradiation process, observation process, and detection process) shown in FIG. 7 is executed after the head 4 moves from the ejection position to the maintenance position. Note that part or all of the processing procedure shown in FIG. 7 may be executed under the control of the control unit 13 .
  • the light source 5 obliquely irradiates the ejection surface 4s of the head 4 with light (step S101, irradiation step).
  • the irradiation step light is irradiated along the lateral direction (X-axis direction) of the head 4 in plan view.
  • the path of the light irradiated onto the ejection surface 4s and the path of the reflected light from the ejection surface 4s are positioned along the short direction of the head 4 (the X-axis direction).
  • the ejection surface 4s is irradiated with light having a wavelength within the range of 460 nm or more and 620 nm or less at which the light intensity becomes maximum.
  • Light having a maximum light intensity wavelength of less than 460 nm or light having a maximum light intensity wavelength of greater than 620 nm can significantly reduce relative luminosity in scotopic vision and photopic vision.
  • a decrease in relative luminosity in scotopic vision and photopic vision is suppressed. Therefore, the visibility of the ejection surface 4s is improved.
  • the ejection surface 4s is irradiated with light at an irradiation angle ⁇ of 10° or more and 80° or less.
  • the observation device 6 observes the ejection surface 4s irradiated with light (step S102, observation step).
  • the observer O is provided with a mirror image of the ejection surface 4s reflected on the observation device 6, which is a reflecting mirror, as an observation result.
  • a mirror image of the ejection surface 4s is provided toward the observation position (the position of the observer O in FIG. 3) in the longitudinal direction (Y-axis direction) of the head 4 in plan view. Accordingly, the observer O at the observation position can observe the mirror image of the ejection surface 4s without being obstructed by the light irradiated on the ejection surface 4s and the reflected light from the ejection surface 4s.
  • FIG. 8 is a diagram showing a specific example of the detection process according to the embodiment.
  • FIG. 8 shows a mirror image of the ejection surface 4s reflected on the observing device 6, which is a reflecting mirror. Further, in FIG. 8, the region R of the ejection surface 4s that has been irradiated with light is shown.
  • the height of the liquid L leaked from the ejection surface 4s is greater than that of the mist-like deposits adhering to the ejection surface 4s. For this reason, under a situation where the liquid L is leaking from the ejection surface 4s, if the ejection surface 4s is irradiated with light from an oblique direction, the surroundings of the liquid L leaking from the ejection surface 4s will be A shadow Ls is generated. By checking the presence or absence of the shadow Ls of the liquid L in the mirror image of the ejection surface 4s reflected on the observation device 6, the observer O can accurately detect the presence or absence of leakage of the liquid from the ejection surface 4s. can.
  • the detection step detects that there is leakage of liquid from the ejection surface 4s
  • a cleaning step for cleaning the ejection surface 4s may be performed.
  • the liquid ejection device 1 may include a cleaning section for cleaning the ejection surface 4 s of the head 4 .
  • the cleaning unit cleans the head 4 by, for example, wiping processing or purging processing.
  • the wiping process is, for example, a process of removing exposed liquid from the ejection surface 4s by wiping the ejection surface 4s with a wiping member such as a flexible wiper.
  • the purging process is a process of forcibly ejecting liquid from the ejection holes 405h (see FIG. 6) of the head 4, thereby discharging liquids and foreign substances having a higher viscosity than the standard state from the ejection holes 405h. .
  • a pressure adjustment step of adjusting the pressure of the liquid inside the head 4 may be performed.
  • the pressure of the liquid inside the head 4 may be adjusted by lowering the supply pressure of the discharge pump of the circulation device that supplies the liquid to the head 4 .
  • the pressure of the liquid inside the head 4 may be adjusted by increasing the suction pressure of the suction pump of the circulation device.
  • FIG. 9 is a diagram showing an example of experimental results showing the relationship between the irradiation angle ⁇ of light irradiated onto the ejection surface 4s and the visibility of the ejection surface 4s.
  • the ejection surface 4s was irradiated with light while changing the irradiation angle ⁇ under the condition that liquid was leaking from the ejection surface 4s, and the visibility of the ejection surface 4s was improved. checked for good or bad.
  • the irradiation angles ⁇ illustrated in FIG. 9 are associated with “ ⁇ ”, and the irradiation angles at which the visibility of the ejection surface 4 s was not good. "x" is associated with ⁇ . Also, the irradiation angle ⁇ at which the visibility of the ejection surface 4s was the best is associated with “ ⁇ ”.
  • the visibility of the ejection surface 4s is good when the observer O can confirm the shadow of the liquid leaked from the ejection surface 4s in the mirror image of the ejection surface 4s projected on the observation device 6. was determined to be In the experiment shown in FIG.
  • the experimental conditions used in the experiment shown in FIG. 9 are as follows. Distance between light source 5 and head 4: 300 mm Distance between ejection surface 4s and observation device 6: 200 mm Intensity of light applied to ejection surface 4s: 3400 lumens Wavelength of light applied to ejection surface 4s: 510 nm
  • the irradiation angle ⁇ was 10° or more and 80° or less
  • the visibility of the ejection surface 4s was good.
  • the irradiation angle ⁇ was 20° or more and 40° or less
  • the visibility of the ejection surface 4s was the best. That is, from the experimental results shown in FIG. 9, the ejection surface 4s is irradiated with light at an irradiation angle of 10° or more and 80° or less, and more preferably at an irradiation angle of 20° or more and 40° or less. It was confirmed that good visibility of the surface 4s could be maintained.
  • the ejection holes 405h located in a plurality of irradiation areas of the ejection surface 4s 6) may be sequentially observed by the observation device 6 .
  • the observer O can sequentially detect liquid leakage from the plurality of ejection holes 405h.
  • the most upstream side is the supply side to which the liquid is supplied to the head 4, and the side where the pressure is the highest in the flow path (see FIG. 5 or FIG. 6) inside the head 4 (or the most supply port). It can also be said that it is the side close to Pin ).
  • the observation device 6 may observe the discharge hole group irradiated with light. In this way, only the ejection hole group including the ejection hole 405h located on the most upstream side in the liquid flow direction inside the head 4 is irradiated with light and observed, thereby reducing the work burden on the observer O. be able to.
  • the liquid ejecting apparatus 1 may have an imaging device that converts a mirror image of the ejection surface 4s reflected on the observation device 6, which is a reflecting mirror, into image data. Then, the control unit 13 performs image analysis processing on the image data obtained from the image sensor, and determines whether or not there is a shadow of the liquid leaked from the ejection surface 4s using the image analysis result. It is possible to detect the presence or absence of liquid leakage in the
  • the observation device 6 is a reflecting mirror
  • the observation device 6 may be an imaging device.
  • a captured image an example of a second observation result
  • a captured image of the ejection surface 4s may be provided to, for example, a display device (not shown).
  • the detection step step S103 in FIG. 7
  • presence or absence of leakage of liquid from the ejection surface 4s may be detected based on the captured image of the ejection surface 4s.
  • a circulation type liquid ejection head is used as the head 4 in the description, a non-circulation type liquid ejection head may be used.
  • a pressure adjusting step of adjusting the pressure of the liquid inside the head 4 may be performed. Specifically, it can be adjusted by changing the height of the liquid surface of the ink tank.
  • the liquid detection method includes an irradiation process (eg, step S101), an observation process (eg, step S102), and a detection process (eg, step S103).
  • a light source for example, A light source 5
  • an observation device for example, observation device 6
  • the detecting step the presence or absence of leakage of liquid from the ejection surface is detected based on the result of observation of the ejection surface by an observation device.
  • the observation equipment may be a reflector.
  • the observation step may provide a mirror image of the ejection surface reflected on the reflecting mirror as an observation result.
  • the detection step may detect the presence or absence of liquid leakage from the ejection surface based on the mirror image of the ejection surface.
  • an observer for example, an observer O
  • the presence or absence of liquid leakage can be detected with high accuracy.
  • the observation step may provide a mirror image of the ejection surface toward an observation position that does not overlap the path of the light applied to the ejection surface and the path of the reflected light from the ejection surface in plan view.
  • the observer at the observation position can confirm the mirror image of the ejection surface without being blocked by the light irradiated on the ejection surface and the reflected light from the ejection surface. be able to.
  • the head may have a substantially rectangular parallelepiped shape.
  • the light may be irradiated along the short direction of the head (for example, the X-axis direction) in plan view.
  • the observation step may provide a mirror image of the ejection surface toward an observation position in the longitudinal direction of the head (eg, Y-axis direction) in plan view.
  • the observer at the observation position can confirm the mirror image of the ejection surface without being blocked by the light irradiated on the ejection surface and the reflected light from the ejection surface. be able to.
  • the observation equipment may be an imaging device.
  • an image of the ejection surface captured by the imaging device may be provided as an observation result.
  • detection step presence or absence of leakage of liquid from the ejection surface may be detected based on a captured image of the ejection surface.
  • the observer can check whether or not there is a shadow of the liquid in the captured image of the ejection surface captured by the imaging device, thereby detecting whether or not the liquid leaks from the ejection surface. can be detected with high accuracy.
  • the ejection surface may be irradiated with light having a wavelength within a range of 460 nm or more and 620 nm or less at which the light intensity is maximum.
  • the visibility of the ejection surface is improved because the decrease in relative luminosity in scotopic vision and photopic vision is suppressed.
  • the ejection surface may be irradiated with light at an irradiation angle (for example, irradiation angle ⁇ ) of 10° or more and 80° or less.
  • irradiation angle ⁇ for example, irradiation angle ⁇
  • the head may be movable between an ejection position at which liquid is ejected onto a recording medium (for example, the recording medium M) and a maintenance position at which maintenance processing of the head is performed.
  • the irradiation process, the observation process, and the detection process may be performed after the head moves from the ejection position to the maintenance position.
  • the head may have a substantially rectangular parallelepiped shape.
  • the light source may sequentially irradiate a plurality of irradiation areas of the ejection surface with light while moving the light source in the longitudinal direction of the head (for example, the Y-axis direction).
  • the observation device may be moved in the longitudinal direction (Y-axis direction) of the head, and the observation device may sequentially observe the ejection holes positioned in the plurality of irradiation areas of the ejection surface.
  • the observer can sequentially detect the leakage of the liquid from the plurality of ejection holes.
  • the irradiation step light may be applied to an ejection hole group including an ejection hole located on the most upstream side in the flow direction of the liquid inside the head, among the plurality of ejection holes on the ejection surface.
  • the observation step the discharge hole group irradiated with light may be observed by an observation device.
  • the liquid detection method according to the embodiment may further include a cleaning step of cleaning the ejection surface when the detection step detects that liquid has leaked from the ejection surface.
  • the liquid exposed from the ejection surface can be removed.
  • the liquid detection method according to the embodiment may further include a pressure adjustment step of adjusting the pressure of the liquid inside the head when the detection step detects that the liquid has leaked from the ejection surface.
  • the liquid exposed from the ejection surface can be removed.

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  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention concerne un procédé de détection de liquide comprenant une étape d'exposition au rayonnement, une étape d'observation et une étape de détection. Dans l'étape d'exposition au rayonnement, une surface d'évacuation d'une tête qui présente la surface d'évacuation, dans laquelle une pluralité de trous d'évacuation pour évacuer un liquide sont formés, est exposée au rayonnement d'une lumière provenant d'une source de lumière à partir d'une direction diagonale. Dans l'étape d'observation, la surface d'évacuation exposée au rayonnement est observée avec un appareil d'observation. Dans l'étape de détection, la présence ou l'absence de fuite du liquide au niveau de la surface d'évacuation est détectée sur la base du résultat d'observation par l'appareil d'observation.
PCT/JP2023/007115 2022-02-28 2023-02-27 Procédé de détection de liquide et dispositif d'évacuation de liquide Ceased WO2023163181A1 (fr)

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JP2024503293A JP7776611B2 (ja) 2022-02-28 2023-02-27 液体検知方法及び液体吐出装置

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JP2022-030339 2022-02-28
JP2022030339 2022-02-28

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005349635A (ja) * 2004-06-09 2005-12-22 Olympus Corp 液滴吐出ヘッドの検査装置及びその検査方法
JP2009143071A (ja) * 2007-12-13 2009-07-02 Brother Ind Ltd 液体吐出装置
JP2018024131A (ja) * 2016-08-09 2018-02-15 セイコーエプソン株式会社 液滴吐出装置
JP2018034492A (ja) * 2016-08-31 2018-03-08 東友科技股▲ふん▼有限公司Ｔｅｃｏ Ｉｍａｇｅ Ｓｙｓｔｅｍｓ Ｃｏ．，Ｌｔｄ． インクジェットプリンター及びその検査装置
JP2021037714A (ja) * 2019-09-04 2021-03-11 株式会社リコー 液面撮像装置、液体を吐出する装置
US20210122154A1 (en) * 2019-10-23 2021-04-29 Semes Co., Ltd. Droplet inspection module and droplet inspection method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007229928A (ja) * 2006-02-27 2007-09-13 Konica Minolta Holdings Inc 液体吐出装置及び液体吐出方法
CN103459158B (zh) * 2011-03-20 2016-04-13 惠普发展公司，有限责任合伙企业 液滴检测
JP2020151961A (ja) * 2019-03-20 2020-09-24 セイコーエプソン株式会社 液体吐出装置、及び、液体吐出装置の制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005349635A (ja) * 2004-06-09 2005-12-22 Olympus Corp 液滴吐出ヘッドの検査装置及びその検査方法
JP2009143071A (ja) * 2007-12-13 2009-07-02 Brother Ind Ltd 液体吐出装置
JP2018024131A (ja) * 2016-08-09 2018-02-15 セイコーエプソン株式会社 液滴吐出装置
JP2018034492A (ja) * 2016-08-31 2018-03-08 東友科技股▲ふん▼有限公司Ｔｅｃｏ Ｉｍａｇｅ Ｓｙｓｔｅｍｓ Ｃｏ．，Ｌｔｄ． インクジェットプリンター及びその検査装置
JP2021037714A (ja) * 2019-09-04 2021-03-11 株式会社リコー 液面撮像装置、液体を吐出する装置
US20210122154A1 (en) * 2019-10-23 2021-04-29 Semes Co., Ltd. Droplet inspection module and droplet inspection method

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