WO2021235338A1 - Recording device - Google Patents

Recording device Download PDF

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Publication number
WO2021235338A1
WO2021235338A1 PCT/JP2021/018373 JP2021018373W WO2021235338A1 WO 2021235338 A1 WO2021235338 A1 WO 2021235338A1 JP 2021018373 W JP2021018373 W JP 2021018373W WO 2021235338 A1 WO2021235338 A1 WO 2021235338A1
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WO
WIPO (PCT)
Prior art keywords
water
wiper
cleaning liquid
recording device
ink
Prior art date
Application number
PCT/JP2021/018373
Other languages
French (fr)
Japanese (ja)
Inventor
慎平 伊藤
Original Assignee
ブラザー工業株式会社
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Filing date
Publication date
Application filed by ブラザー工業株式会社 filed Critical ブラザー工業株式会社
Publication of WO2021235338A1 publication Critical patent/WO2021235338A1/en

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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
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles

Definitions

  • the present invention relates to a recording device in which water-based ink is ejected from a head toward a recording medium, in which the tip of a wiper that wipes the nozzle surface of the head is cleaned by a cleaning member that holds a cleaning liquid.
  • a printing device in which a recording medium to which ink ejected from a nozzle of a print head adheres is heated by a heater to fix the ink on the recording medium (see Patent Document 1).
  • the nozzle surface of the print head is wiped with a wiper to obtain a nozzle.
  • the ink adhering to the surface is removed. Since the ink removed from the nozzle surface adheres to the wiper, the cleaning member holding the cleaning liquid comes into contact with the wiper, and the wiper is cleaned.
  • the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a means for preventing water-based ink from staying in a portion of a cleaning member that holds a cleaning liquid in contact with a tip portion of a wiper. be.
  • the recording apparatus includes a head that ejects water-based ink from a nozzle, a wiper having a tip portion that wipes the nozzle surface of the head, a cleaning member that comes into contact with the tip portion, and cleaning held by the cleaning member. It is equipped with a liquid.
  • the water-based ink contains a coloring material.
  • the viscosity of the cleaning liquid is 120 mPa ⁇ S or less.
  • a recording device in which the following formula 1 holds when the density of the water-based ink is A and the density of the cleaning liquid is B. (Equation 1) B> A
  • the water-based ink does not easily stay in the portion that comes into contact with the tip of the wiper.
  • FIG. 1 is a perspective view of the recording device 10.
  • FIG. 2 is a schematic diagram showing the internal configuration of the recording device 10.
  • FIG. 3 is a schematic view showing a print head 34, a cap 71, a wiper 72, and a cleaning member 74.
  • FIG. 4 is a schematic diagram showing a cleaning operation.
  • FIG. 5 is a schematic view showing a modified example of the cleaning member 74.
  • the recording device 10 according to the embodiment of the present invention will be described. It is needless to say that the embodiments described below are merely examples of the present invention, and the embodiments can be appropriately changed without changing the gist of the present invention. Further, in the following description, the direction from the start point to the end point of the arrow is expressed as the direction, and the traffic on the line connecting the start point and the end point of the arrow is expressed as the direction. Further, in the following description, the vertical direction 7 is defined with reference to the state in which the recording device 10 is usably installed (the state in FIG. 1), and the side where the discharge port 13 is provided is the front side (front side). The front-back direction 8 is defined as, and the left-right direction 9 is defined when the recording device 10 is viewed from the front side (front side).
  • the recording device 10 includes a housing 20, a panel unit 21, a cover 22, a paper feed tray 23, and a paper output tray 24 held in the housing 20.
  • the recording device 10 records an image on the sheet 6 (see FIG. 2).
  • Sheet 6 is an example of a recording medium.
  • the sheet 6 may be a recording medium cut to a predetermined size, the sheet may be drawn from a roll wound in a cylindrical shape, or may be a fan fold type. good. Further, the sheet 6 may be uncoated paper or may be coated paper.
  • the "coated paper” refers to, for example, a paper made of pulp such as high-grade printing paper and intermediate-grade printing paper coated with a coating agent for the purpose of improving smoothness, whiteness, glossiness, etc. Specific examples thereof include high-quality coated paper and medium-quality coated paper.
  • the sheet 6 may be a tack paper in which a pressure-sensitive adhesive and a release paper are combined.
  • the panel unit 21 includes a touch panel and a plurality of operation switches.
  • the panel unit 21 accepts user operations.
  • the paper feed tray 23 is located at the lower part of the housing 20.
  • the output tray 24 is located at the bottom of the housing 20 and above the paper feed tray 23.
  • the cover 22 is located on the right side of the front surface of the housing 20. The cover 22 is rotatable with respect to the housing 20. When the cover 22 is opened, the tank 70 for storing ink is accessible.
  • the tank 70 is not limited to the one that stores ink of one color such as black, and for example, black, yellow, cyan, and magenta 4 It may have four storage chambers for storing colored inks, respectively.
  • the housing 20 holds the printing engine 50 inside.
  • the printing engine 50 mainly includes a printing head 34, a feeding roller 25, a transport roller 26, a discharging roller 27, a platen 28, and a heater 38.
  • the feeding roller 25 is held in a frame (not shown) provided in the housing 20 so as to be able to come into contact with the sheet 6 placed on the paper feed tray 23.
  • the feeding roller 25 is rotated by a motor (not shown).
  • the rotating feed roller 25 feeds the sheet 6 to the transport path 37.
  • the transport path 37 is a space partitioned by a guide member (not shown). In the illustrated example, the transport path 37 is curved and extends from the rear end of the paper feed tray 23 to a position above the paper feed tray 23, and then extends forward.
  • the transport roller 26 is located downstream of the paper feed tray 23 in the transport direction of the sheet 6.
  • the transfer roller 26 constitutes a roller pair together with the driven roller 35.
  • the transport roller 26 is rotated by a motor (not shown).
  • the rotating transport roller 26 and the driven roller 35 transport the sheet 6 sent to the transport path 37 by the feed roller 25 while sandwiching it.
  • the discharge roller 27 is located downstream of the transport roller 26 in the transport direction of the sheet 6.
  • the discharge roller 27, together with the driven roller 36 constitutes a roller pair.
  • the discharge roller 27 is rotated by a motor (not shown).
  • the rotating discharge roller 27 and the driven roller 36 convey the sheet 6 while sandwiching it, and discharge it to the paper discharge tray 24.
  • the platen 28 is located between the transport roller 26 and the discharge roller 27 in the front-rear direction 8, downstream of the transport roller 26 in the transport direction of the sheet 6, and upstream of the discharge roller 27.
  • the print head 34 is located between the transfer roller 26 and the discharge roller 27.
  • the print head 34 is a so-called serial head. That is, the print head 34 can move along the left-right direction 9.
  • the print head 34 is always located at a maintenance position described later and is covered with a cap 71 (see FIG. 3).
  • the print head 34 has an internal flow path through which ink flows. The flow path is communicated with the tank 70 by a tube 31. That is, the ink stored in the tank 70 is supplied to the print head 34 through the tube 31.
  • the print head 34 has a plurality of nozzles 33 that open toward the platen 28.
  • the ink supplied to the print head 34 through the flow path is selectively ejected as ink droplets from the plurality of nozzles 33 while the print head 34 is moving.
  • the print head 34 may be a line head instead of a serial head.
  • the wiper 72 moves with respect to the line head and the nozzle surface is wiped.
  • the platen 28 is located below the print head 34.
  • the upper surface of the platen 28 is the support surface of the sheet 6.
  • an opening for generating suction pressure is formed on the upper surface of the platen 28. The suction pressure generated on the upper surface of the platen 28 causes the sheet 6 to come into close contact with the upper surface of the platen 28.
  • the heater 38 is located above the transport path 37, downstream of the print head 34 and upstream of the discharge roller 27.
  • the heater 38 is a so-called halogen heater.
  • the heater 38 is located downstream, that is, in front of the print head 34 in the transport direction.
  • the heater 38 has a halogen lamp 40 which is a heating element that radiates infrared rays, a reflector 41, and a housing 42.
  • the housing 42 has a substantially rectangular parallelepiped shape and opens downward.
  • the opening 43 is located on the lower wall of the housing 42. Heat from the halogen lamp 40 and the reflector 41 is radiated to the outside or blocked through the opening 43.
  • the halogen lamp 40 is located in the internal space of the housing 42.
  • the halogen lamp 40 has an elongated cylindrical shape, and the left-right direction 9 is the longitudinal direction.
  • the reflector 41 is located above the halogen lamp 40.
  • the reflector 41 is a metal plate coated with a ceramic film or the like, and is curved in an arc shape with the vicinity of the opening 43 as the central axis.
  • a halogen lamp 40 coated with a ceramic film or the like may be used.
  • the heater 38 heats at least one of the sheet 6 passing under the opening 43 and the ink adhering to the sheet 6. In this embodiment, the heater 38 heats both the sheet 6 and the ink. When the ink is heated, the resin fine particles are transferred to the glass, and the sheet 6 that has passed under the heater 38 is cooled, so that the glass-transferred resin is cured. As a result, the ink is fixed on the sheet 6.
  • the heater 38 is not limited to a halogen heater as long as it can heat a sheet or ink.
  • the heater 38 may be a carbon heater, a dryer, an oven, a belt conveyor oven, or the like.
  • Cap 71 and wiper 72 As shown in FIG. 3, the cap 71 is made of an elastic material such as rubber. The cap 71 is located below the print head 34 in the maintenance position. The cap 71 has a cup shape that opens upward. The cap 71 can be moved in the vertical direction 7. As shown by the broken line in FIG. 3, the cap 71 is in close contact with the nozzle surface 33A of the print head 34 at the maintenance position and covers all the nozzle 33 openings.
  • a waste ink tube 71A is connected to the cap 71. Specifically, a discharge port is formed at the bottom of the cap 71. One end of the waste ink tube 71A is connected to the discharge port so that fluid can communicate with the discharge port. The other end of the waste ink tube 71A is connected to a waste ink tank (not shown).
  • the print head 34 is covered with a cap 71, and a flushing process or a purge process is executed.
  • the ink in the print head 34 is forcibly ejected by the flushing process or the purging process.
  • the ink discharged from the print head 34 is received by the cap 71 and guided to the waste ink tank via the waste ink tube 71A.
  • the wiper 72 can move up and down 7 on the side of the cap 71.
  • the wiper 72 moves in the vertical direction 7 while holding the tip of the wiper blade made of an elastic material such as rubber upward.
  • the tip portion 72A of the wiper blade abuts on the nozzle surface 33A of the print head 34 that moves along the left-right direction 9.
  • the ink droplets adhering to the nozzle surface 33A of the print head 34 are wiped off by the wiper 72.
  • a cleaning member 74 is located below the print head 34.
  • the cleaning member 74 includes a cleaner carriage 75 and a wiper cleaner 76.
  • the cleaner carriage 75 is a resin frame having a rectangular outer shape when viewed from above.
  • the wiper cleaner 76 is supported by the cleaner carriage 75.
  • the wiper cleaner 76 has a substantially rectangular parallelepiped shape.
  • the wiper cleaner 76 is a foam (foam) that wipes the ink adhering to the tip portion 72A of the wiper 72, and examples thereof include melamine foam.
  • the wiper cleaner 76 holds the cleaning liquid.
  • the lower surface of the wiper cleaner 76 is located along the front-rear direction 8 and the left-right direction 9, and is located slightly below the tip portion 72A of the wiper 72 located below (cleaning position) as shown by a solid line in FIG.
  • the upper surface and the upper portion of the wiper cleaner 76 are located above the tip portion 72A of the wiper 72 located below (cleaning position).
  • the ink contains a resin-dispersed pigment (an example of a coloring material) as a pigment, resin fine particles, a water-soluble organic solvent, and water.
  • the pigment may be a self-dispersing pigment that can be dispersed without a dispersant, or a resin-dispersed pigment.
  • the resin-dispersed pigment can be dispersed in water by, for example, a pigment-dispersing resin (resin dispersant).
  • the resin dispersion pigment is not particularly limited, and examples thereof include carbon black, inorganic pigments, and organic pigments. Examples of carbon black include furnace black, lamp black, acetylene black, and channel black. Examples of the inorganic pigment include titanium oxide, iron oxide-based inorganic pigment, carbon black-based inorganic pigment, and the like.
  • organic pigment examples include azo pigments such as azolake, insoluble azo pigment, condensed azo pigment, and chelate azo pigment; phthalocyanine pigment, perylene and perinone pigment, anthraquinone pigment, quinacridone pigment, dioxazine pigment, thioindigo pigment, isoindolinone pigment, and quinophthalone.
  • Polycyclic pigments such as pigments; dye lake pigments such as basic dye type lake pigments and acidic dye type lake pigments; nitro pigments; nitroso pigments; aniline black daylight fluorescent pigments; and the like.
  • resin dispersion pigments other than these include C.I. I. Pigment Black 1, 6 and 7; C.I. I.
  • the ink may further contain other pigments, dyes and the like. Further, the ink may contain only a dye as a coloring material.
  • the pigment solid content of the resin dispersion pigment in the total amount of the ink is not particularly limited, and can be appropriately determined, for example, depending on the desired optical density or saturation.
  • the pigment solid content is the mass of the pigment only, and does not include the mass of the resin fine particles.
  • One type of resin dispersion pigment may be used alone, or two or more types may be used in combination.
  • the resin fine particles for example, those containing at least one of methacrylic acid and acrylic acid as a monomer can be used, and for example, a commercially available product may be used.
  • the resin fine particles may further contain, for example, styrene, vinyl chloride, or the like as the monomer.
  • the resin fine particles may be contained in, for example, a resin emulsion.
  • the resin emulsion is composed of, for example, resin fine particles and a dispersion medium (for example, water or the like). The resin fine particles are not in a dissolved state with respect to the dispersion medium, but are dispersed in a specific particle size range.
  • Examples of the resin fine particles contained in the resin emulsion include acrylic acid-based resin, maleic acid-based ester resin, vinyl acetate-based resin, carbonate-type resin, polycarbonate-type resin, styrene-based resin, ethylene-based resin, polyethylene-based resin, and propylene-based resin.
  • Examples thereof include resins, polypropylene-based resins, urethane-based resins, polyurethane-based resins, polyester-based resins, and copolymer resins thereof.
  • the content of the resin fine particles in the total amount of the ink is not particularly limited. One type of resin fine particles may be used alone, or two or more types may be used in combination.
  • water-soluble organic solvent examples include glycerin, triethylene glycol, butylene glycol, dipropylene glycol, tripropylene glycol, thiodiglycol, trimethylolpropane, trimethylolethane, polyethylene glycol, polypropylene glycol and the like.
  • glycerin triethylene glycol
  • butylene glycol dipropylene glycol
  • tripropylene glycol tripropylene glycol
  • thiodiglycol trimethylolpropane
  • trimethylolethane trimethylolethane
  • polyethylene glycol polypropylene glycol and the like.
  • One type of these organic solvents may be used alone, or two or more types may be used in combination.
  • the water is preferably ion-exchanged water or pure water.
  • the ink may further contain a conventionally known additive, if necessary.
  • the additive include a surfactant, a pH adjuster, a surface tension adjuster, an antifungal agent and the like.
  • the viscosity adjusting agent include polyvinyl alcohol, cellulose, and water-soluble resins.
  • a resin dispersion pigment, resin fine particles, a specific organic solvent, water, and if necessary, other additive components are uniformly mixed by a conventionally known method, and an insoluble matter is removed by a filter or the like. It can be prepared by removing it.
  • the cleaning liquid contains a water-soluble organic solvent and water.
  • the saturated vapor pressure of the water-soluble organic solvent at 20 ° C. is preferably 0.1 hPa or less, and more preferably the saturated vapor pressure at 20 ° C. is 0.02 hPa or less.
  • the saturated vapor pressure of the water-soluble organic solvent is in this range, the water-soluble organic solvent is less likely to volatilize from the cleaning liquid. As a result, the ink adhering to the wiper 72 and the cleaning liquid held in the wiper cleaner 76 are easily replaced, and the cleaning effect of the wiper 72 is maintained for a long time.
  • water-soluble organic solvent examples include glycerin, diethylene glycol, triethylene glycol, butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, thiodiglycol, polyethylene glycol, polypropylene glycol and the like.
  • One of these water-soluble organic solvents may be used alone, or two or more of them may be used in combination.
  • the content of the water-soluble organic solvent in the total amount of the cleaning liquid is preferably 50% by mass or more, more preferably 70% by mass or more.
  • the average molecular weight of polyethylene glycol is, for example, 180-200.
  • the water is preferably ion-exchanged water or pure water.
  • the content of water in the total amount of the cleaning liquid is, for example, preferably 50% by mass or less, and more preferably 30% by mass or less.
  • the water content may be, for example, the balance of other components.
  • the viscosity of the cleaning liquid is preferably 120 mPa ⁇ S or less, more preferably 80 mPa ⁇ S or less, and particularly preferably 5 mPa ⁇ S or more and 80 mPa ⁇ S or less.
  • the density (B) of the cleaning liquid preferably has a relationship of (formula 1) with respect to the density (A) of the ink, and more preferably has a relationship of (formula 2).
  • Equation 1 B> A
  • Equation 2) BA BA ⁇ 0.03
  • the ink 5 flowing from the tip end portion 72A of the wiper 72 to the wiper cleaner 76 exists near the lower surface of the wiper cleaner 76 immediately after the cleaning operation. Since the density (A) of the ink 5 is smaller than the density (B) of the cleaning liquid (B> A), with the passage of time, as shown in FIG. 4 (B), near the lower surface of the wiper cleaner 76. The ink 5 present in the above moves upward. As a result, in the subsequent cleaning operation, the tip portion 72A of the wiper 72 comes into contact with the lower surface and the lower portion of the wiper cleaner 76 in which the ink 5 is scarcely present.
  • the cleaning member 74 moves relative to the wiper 72 while being positioned above the tip 72A in a posture in which the wiper 72 faces upward, the lower surface of the wiper cleaner 76 does not necessarily move in the front-rear direction 8 and left and right. It does not have to be along the direction 9.
  • the cleaning member 74 is in a state where the lower surface of the wiper cleaner 76 is inclined with respect to the horizontal direction (horizontal direction 9), and the cleaning member 74 refers to the tip portion 72A of the wiper 72 in the cleaning operation. May move relative to each other.
  • the cleaning member 74 may have a contact portion that comes into contact with the tip portion 72A of the wiper 72 and a non-contact portion that is located above the contact portion and does not come into contact with the tip portion 72A of the wiper 72. ..
  • the surface of the wiper cleaner 76 in contact with the wiper 72 is along the vertical direction 7, and the tip portion 72A of the wiper 72 is in the front-rear direction 8 or the left-right direction 9 (FIG. 5 (FIG. 5). In B), it may move relative to the cleaning member 74 while facing sideways along the left-right direction 9).
  • the tip portion 72A of the wiper 72 does not move relative to the upper portion 76U of the wiper cleaner 76, the upper portion 76U of the wiper cleaner 76 becomes a non-contact portion. Then, the lower portion 76L of the wiper cleaner 76 becomes a contact portion. Therefore, the ink flowing from the tip portion 72A of the wiper 72 to the lower portion 76L of the wiper cleaner 76 moves to the upper portion 76U of the wiper cleaner 76 with the passage of time.
  • Pigment dispersion A Pure water was added to 20% by mass of the pigment (carbon black) and 7% by mass of the neutralized sodium hydroxide of the styrene-acrylic acid copolymer (acid value 175 mgKOH / g, molecular weight 10000) to make the whole 100% by mass. The mixture was stirred and mixed to obtain a mixture. This mixture was placed in a wet sand mill filled with 0.3 mm diameter zirconia beads and subjected to a dispersion treatment for 6 hours. Then, the zirconia beads were removed by a separator and filtered through a cellulose acetate filter having a pore size of 3.0 ⁇ m to obtain a pigment dispersion liquid A.
  • the styrene-acrylic acid copolymer is a water-soluble polymer generally used as a dispersant for pigments.
  • Resin fine particles "High Loose-X (registered trademark) QE-1042” manufactured by Seiko PMC Corporation
  • Water-soluble organic solvent Propylene glycol (saturated vapor pressure at 20 ° C: 0.1 hPa), glycerin (saturated vapor pressure at 20 ° C: 0.001 hPa)
  • Surfactant "Orfin (registered trademark) E1010” manufactured by Nissin Chemical Industry Co., Ltd.
  • the cleaning liquids of Examples 1 to 8 and Comparative Examples 1 to 3 were obtained by uniformly mixing the water-soluble organic solvent with water in the blending amounts shown in Table 2.
  • Water-soluble organic solvent glycerin (saturated vapor pressure at 20 ° C.: 0.001 hPa), diethylene glycol (saturated vapor pressure at 20 ° C.: 0.03 hPa), propylene glycol (saturated vapor pressure at 20 ° C.: 0.1 hPa), triethylene Glycer butyl ether (saturated vapor pressure at 20 ° C: 0.01 hPa)
  • Table 2 shows the evaluation results of Examples 1 to 8 and Comparative Examples 1 to 3.
  • Example 6 in which the relationship between the ink density (A) and the cleaning liquid density (B) does not satisfy (Equation 2), the increase in ink was evaluated as A. Further, in Example 5 in which the viscosity of the cleaning liquid was larger than 80 mPa ⁇ S, the increase in ink was evaluated as A. Further, in Example 6 in which the viscosity of the cleaning liquid was less than 5 mPa ⁇ S, the retention of the cleaning liquid was evaluated as A.

Landscapes

  • Ink Jet (AREA)

Abstract

Provided is a means of inhibiting a water-based ink from remaining in a section of a cleaning member that retains a cleaning fluid, said section coming into contact with a tip end section of a wiper. A recording device 10 is provided with: a platen 28; a printhead 34; a wiper 72 that has a tip end section 72A wiping a nozzle surface 33A of the printhead 34; a cleaning member 74 that comes into contact with the tip end section 72A; and a cleaning fluid that is retained in the cleaning member 74. The viscosity of the cleaning fluid is 120 mPa∙S or less. When the density of the water-based ink is A and the density of the cleaning fluid is B, expression 1 (B>A) is satisfied.

Description

記録装置Recording device
　本発明は、記録媒体へ向かってヘッドから水性インクが吐出される記録装置であって、ヘッドのノズル面を拭うワイパの先端部が、クリーニング液を保持するクリーニング部材により洗浄される記録装置に関する。 The present invention relates to a recording device in which water-based ink is ejected from a head toward a recording medium, in which the tip of a wiper that wipes the nozzle surface of the head is cleaned by a cleaning member that holds a cleaning liquid.
　印刷ヘッドのノズルから吐出されたインクが付着した記録媒体が、ヒータにより加熱されることによって、インクが記録媒体に定着する印刷装置が知られている（特許文献１参照）。 A printing device is known in which a recording medium to which ink ejected from a nozzle of a print head adheres is heated by a heater to fix the ink on the recording medium (see Patent Document 1).
特許第４５０５９２１号公報Japanese Patent No. 4505921
　印刷ヘッドのノズルからインクを強制的に排出するパージや、印刷ヘッドのノズルからインク滴を連続的に吐出するフラッシングなどが実行された後、印刷ヘッドのノズル面がワイパにより拭われることによって、ノズル面に付着したインクが除去される。ノズル面から除去されたインクはワイパに付着するので、クリーニング液を保持するクリーニング部材がワイパと接触して、ワイパが洗浄される。 After purging forcibly ejecting ink from the nozzle of the print head and flushing to continuously eject ink droplets from the nozzle of the print head, the nozzle surface of the print head is wiped with a wiper to obtain a nozzle. The ink adhering to the surface is removed. Since the ink removed from the nozzle surface adheres to the wiper, the cleaning member holding the cleaning liquid comes into contact with the wiper, and the wiper is cleaned.
　クリーニング部材は繰り返しワイパと接触するので、クリーニング部材にはインクが累積的に貯まっていく。ワイパの洗浄を効果的に行うには、クリーニング部材においてワイパと接触する部分に、インクが蓄積されていない方が望ましい。 Since the cleaning member repeatedly comes into contact with the wiper, ink accumulates in the cleaning member. In order to effectively clean the wiper, it is desirable that ink is not accumulated in the portion of the cleaning member that comes into contact with the wiper.
　本発明は、前述された事情に鑑みてなされたものであり、その目的は、クリーニング液を保持するクリーニング部材において、ワイパの先端部と接触する部分に水性インクが留まりにくい手段を提供することにある。 The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a means for preventing water-based ink from staying in a portion of a cleaning member that holds a cleaning liquid in contact with a tip portion of a wiper. be.
　本発明に係る記録装置は、ノズルから水性インクを吐出するヘッドと、上記ヘッドのノズル面を拭う先端部を有するワイパと、上記先端部と接触するクリーニング部材と、上記クリーニング部材に保持されるクリーニング液と、を具備する。上記水性インクは、色材を含んでいる。上記クリーニング液の粘度は、１２０ｍＰａ・Ｓ以下である。上記水性インクの密度をＡとし、上記クリーニング液の密度をＢとしたとき、下記式１が成り立つ記録装置。
　（式１）　Ｂ＞Ａ The recording apparatus according to the present invention includes a head that ejects water-based ink from a nozzle, a wiper having a tip portion that wipes the nozzle surface of the head, a cleaning member that comes into contact with the tip portion, and cleaning held by the cleaning member. It is equipped with a liquid. The water-based ink contains a coloring material. The viscosity of the cleaning liquid is 120 mPa · S or less. A recording device in which the following formula 1 holds when the density of the water-based ink is A and the density of the cleaning liquid is B.
(Equation 1) B> A
　本発明によれば、クリーニング液を保持するクリーニング部材において、ワイパの先端部と接触する部分に水性インクが留まりにくい。 According to the present invention, in the cleaning member that holds the cleaning liquid, the water-based ink does not easily stay in the portion that comes into contact with the tip of the wiper.
図１は、記録装置１０の斜視図である。FIG. 1 is a perspective view of the recording device 10. 図２は、記録装置１０の内部構成を示す模式図である。FIG. 2 is a schematic diagram showing the internal configuration of the recording device 10. 図３は、印刷ヘッド３４、キャップ７１、ワイパ７２、及びクリーニング部材７４を示す模式図である。FIG. 3 is a schematic view showing a print head 34, a cap 71, a wiper 72, and a cleaning member 74. 図４は、クリーニング動作を示す模式図である。FIG. 4 is a schematic diagram showing a cleaning operation. 図５は、クリーニング部材７４の変形例を示す模式図である。FIG. 5 is a schematic view showing a modified example of the cleaning member 74.
　以下、本発明の実施形態に係る記録装置１０について説明する。なお、以下に説明される実施形態は本発明の一例にすぎず、本発明の要旨を変更しない範囲で、実施形態を適宜変更できることは言うまでもない。また、以下の説明では、矢印の起点から終点に向かう進みが向きと表現され、矢印の起点と終点とを結ぶ線上の往来が方向と表現される。また、以下の説明においては、記録装置１０が使用可能に設置された状態（図１の状態）を基準として上下方向７が定義され、排出口１３が設けられている側を手前側（前面）として前後方向８が定義され、記録装置１０を手前側（前面）から視て左右方向９が定義される。 Hereinafter, the recording device 10 according to the embodiment of the present invention will be described. It is needless to say that the embodiments described below are merely examples of the present invention, and the embodiments can be appropriately changed without changing the gist of the present invention. Further, in the following description, the direction from the start point to the end point of the arrow is expressed as the direction, and the traffic on the line connecting the start point and the end point of the arrow is expressed as the direction. Further, in the following description, the vertical direction 7 is defined with reference to the state in which the recording device 10 is usably installed (the state in FIG. 1), and the side where the discharge port 13 is provided is the front side (front side). The front-back direction 8 is defined as, and the left-right direction 9 is defined when the recording device 10 is viewed from the front side (front side).
［記録装置１０の外観構成］
　図１に示されるように、記録装置１０は、筐体２０と、筐体２０に保持されるパネルユニット２１、カバー２２、給紙トレイ２３、及び排紙トレイ２４と、を備える。記録装置１０は、シート６（図２参照）に画像を記録する。 [Appearance configuration of recording device 10]
As shown in FIG. 1, the recording device 10 includes a housing 20, a panel unit 21, a cover 22, a paper feed tray 23, and a paper output tray 24 held in the housing 20. The recording device 10 records an image on the sheet 6 (see FIG. 2).
　シート６は、記録媒体の一例である。シート６は、所定の寸法にカットされた記録媒体であってもよいし、シートが円筒形状に巻かれたロールから引き出されたものであってもよいし、ファンフォールドタイプのものであってもよい。また、シート６は、非コート紙であってもよいし、コート紙であってもよい。「コート紙」とは、例えば、上級印刷紙、中級印刷紙等のパルプを構成要素とした紙に、平滑性、白色度、光沢度等の向上を目的として、コート剤を塗布したものをいい、具体的には、上質コート紙、中質コート紙等があげられる。また、シート６は、粘着剤と剥離紙とが組み合わされたタック紙であってもよい。 Sheet 6 is an example of a recording medium. The sheet 6 may be a recording medium cut to a predetermined size, the sheet may be drawn from a roll wound in a cylindrical shape, or may be a fan fold type. good. Further, the sheet 6 may be uncoated paper or may be coated paper. The "coated paper" refers to, for example, a paper made of pulp such as high-grade printing paper and intermediate-grade printing paper coated with a coating agent for the purpose of improving smoothness, whiteness, glossiness, etc. Specific examples thereof include high-quality coated paper and medium-quality coated paper. Further, the sheet 6 may be a tack paper in which a pressure-sensitive adhesive and a release paper are combined.
　パネルユニット２１は、タッチパネル及び複数の操作スイッチを備える。パネルユニット２１は、ユーザの操作を受け付ける。 The panel unit 21 includes a touch panel and a plurality of operation switches. The panel unit 21 accepts user operations.
　図１に示されるように、給紙トレイ２３は、筐体２０の下部に位置する。排紙トレイ２４は、筐体２０の下部であって、給紙トレイ２３の上に位置する。カバー２２は、筐体２０の前面の右部に位置する。カバー２２は、筐体２０に対して回動可能である。カバー２２が開かれると、インクを貯留するタンク７０にアクセス可能である。 As shown in FIG. 1, the paper feed tray 23 is located at the lower part of the housing 20. The output tray 24 is located at the bottom of the housing 20 and above the paper feed tray 23. The cover 22 is located on the right side of the front surface of the housing 20. The cover 22 is rotatable with respect to the housing 20. When the cover 22 is opened, the tank 70 for storing ink is accessible.
　なお、本実施形態では、１つのタンク７０のみが示されているが、タンク７０は、ブラックなどの１色のインクを貯留するものに限定されず、例えば、ブラック、イエロー、シアン、マゼンタの４色のインクをそれぞれ貯留する４つの貯留室を有するものであってもよい。 Although only one tank 70 is shown in the present embodiment, the tank 70 is not limited to the one that stores ink of one color such as black, and for example, black, yellow, cyan, and magenta 4 It may have four storage chambers for storing colored inks, respectively.
［印刷エンジン５０］
　図２に示されるように、筐体２０は、印刷エンジン５０を内部に保持する。印刷エンジン５０は、印刷ヘッド３４、給送ローラ２５、搬送ローラ２６、排出ローラ２７、プラテン２８、及びヒータ３８を主に備える。給送ローラ２５は、給紙トレイ２３に載置されたシート６に当接可能に、筐体２０内に設けられた不図示のフレームに保持されている。給送ローラ２５は、不図示のモータによって回転される。回転する給送ローラ２５は、シート６を搬送路３７に送り出す。搬送路３７は、不図示のガイド部材によって区画された空間である。図示例では、搬送路３７は、給紙トレイ２３の後端から給紙トレイ２３の上方となる位置まで湾曲して延びており、次いで、前方に向かって延びている。 [Print engine 50]
As shown in FIG. 2, the housing 20 holds the printing engine 50 inside. The printing engine 50 mainly includes a printing head 34, a feeding roller 25, a transport roller 26, a discharging roller 27, a platen 28, and a heater 38. The feeding roller 25 is held in a frame (not shown) provided in the housing 20 so as to be able to come into contact with the sheet 6 placed on the paper feed tray 23. The feeding roller 25 is rotated by a motor (not shown). The rotating feed roller 25 feeds the sheet 6 to the transport path 37. The transport path 37 is a space partitioned by a guide member (not shown). In the illustrated example, the transport path 37 is curved and extends from the rear end of the paper feed tray 23 to a position above the paper feed tray 23, and then extends forward.
　搬送ローラ２６は、シート６の搬送方向における給紙トレイ２３の下流に位置している。搬送ローラ２６は、搬送ローラ２６は、従動ローラ３５とともに、ローラ対を構成している。搬送ローラ２６は、不図示のモータによって回転される。回転する搬送ローラ２６及び従動ローラ３５は、給送ローラ２５によって搬送路３７に送り出されたシート６を挟持しつつ搬送する。排出ローラ２７は、シート６の搬送方向における搬送ローラ２６の下流に位置している。排出ローラ２７は、従動ローラ３６とともに、ローラ対を構成している。排出ローラ２７は、不図示のモータによって回転される。回転する排出ローラ２７及び従動ローラ３６は、シート６を挟持しつつ搬送し、排紙トレイ２４に排出する。プラテン２８は、前後方向８における搬送ローラ２６と排出ローラ２７との間であって、シート６の搬送方向における搬送ローラ２６の下流、かつ排出ローラ２７の上流に位置している。 The transport roller 26 is located downstream of the paper feed tray 23 in the transport direction of the sheet 6. The transfer roller 26 constitutes a roller pair together with the driven roller 35. The transport roller 26 is rotated by a motor (not shown). The rotating transport roller 26 and the driven roller 35 transport the sheet 6 sent to the transport path 37 by the feed roller 25 while sandwiching it. The discharge roller 27 is located downstream of the transport roller 26 in the transport direction of the sheet 6. The discharge roller 27, together with the driven roller 36, constitutes a roller pair. The discharge roller 27 is rotated by a motor (not shown). The rotating discharge roller 27 and the driven roller 36 convey the sheet 6 while sandwiching it, and discharge it to the paper discharge tray 24. The platen 28 is located between the transport roller 26 and the discharge roller 27 in the front-rear direction 8, downstream of the transport roller 26 in the transport direction of the sheet 6, and upstream of the discharge roller 27.
　印刷ヘッド３４は、搬送ローラ２６と排出ローラ２７との間に位置する。印刷ヘッド３４は、いわゆるシリアルヘッドである。つまり、印刷ヘッド３４は、左右方向９に沿って移動可能である。印刷ヘッド３４は、常時は、後述されるメンテナンス位置に位置してキャップ７１（図３参照）により覆われている。印刷ヘッド３４は、インクが流通する流路を内部に有する。当該流路は、チューブ３１によって、タンク７０と連通されている。すなわち、チューブ３１を通じて、タンク７０が貯留するインクが印刷ヘッド３４に供給される。印刷ヘッド３４は、プラテン２８へ向かって開口する複数のノズル３３を有する。流路を通じて印刷ヘッド３４に供給されたインクは、印刷ヘッド３４が移動しているときに、複数のノズル３３から選択的にインク滴として吐出される。なお、印刷ヘッド３４はシリアルヘッドではなく、ラインヘッドであってもよい。ラインヘッドの場合、ワイパ７２（図３参照）がラインヘッドに対して移動してノズル面が拭われる。 The print head 34 is located between the transfer roller 26 and the discharge roller 27. The print head 34 is a so-called serial head. That is, the print head 34 can move along the left-right direction 9. The print head 34 is always located at a maintenance position described later and is covered with a cap 71 (see FIG. 3). The print head 34 has an internal flow path through which ink flows. The flow path is communicated with the tank 70 by a tube 31. That is, the ink stored in the tank 70 is supplied to the print head 34 through the tube 31. The print head 34 has a plurality of nozzles 33 that open toward the platen 28. The ink supplied to the print head 34 through the flow path is selectively ejected as ink droplets from the plurality of nozzles 33 while the print head 34 is moving. The print head 34 may be a line head instead of a serial head. In the case of the line head, the wiper 72 (see FIG. 3) moves with respect to the line head and the nozzle surface is wiped.
　印刷ヘッド３４の下方に、プラテン２８が位置する。プラテン２８は、その上面がシート６の支持面である。各図には現れていないが、プラテン２８の上面には、吸引圧が生ずる開口が形成されている。プラテン２８の上面に生じた吸引圧によって、シート６がプラテン２８の上面に密接する。 The platen 28 is located below the print head 34. The upper surface of the platen 28 is the support surface of the sheet 6. Although not shown in each figure, an opening for generating suction pressure is formed on the upper surface of the platen 28. The suction pressure generated on the upper surface of the platen 28 causes the sheet 6 to come into close contact with the upper surface of the platen 28.
　図２及び図３に示されるように、搬送路３７の上方において、印刷ヘッド３４の下流であって、且つ排出ローラ２７の上流に、ヒータ３８が位置する。ヒータ３８は、所謂ハロゲンヒータである。 As shown in FIGS. 2 and 3, the heater 38 is located above the transport path 37, downstream of the print head 34 and upstream of the discharge roller 27. The heater 38 is a so-called halogen heater.
　図２に示されるように、ヒータ３８は、印刷ヘッド３４より搬送方向の下流、すなわち前方に位置する。ヒータ３８は、赤外線を放射する発熱体であるハロゲンランプ４０、反射板４１、及び筐体４２を有する。筐体４２は、概ね直方体形状であり、下向きに開口する。筐体４２の下壁に、開口４３が位置する。開口４３を通じて、ハロゲンランプ４０や反射板４１からの熱が外部へ放射されたり、遮断されたりする。 As shown in FIG. 2, the heater 38 is located downstream, that is, in front of the print head 34 in the transport direction. The heater 38 has a halogen lamp 40 which is a heating element that radiates infrared rays, a reflector 41, and a housing 42. The housing 42 has a substantially rectangular parallelepiped shape and opens downward. The opening 43 is located on the lower wall of the housing 42. Heat from the halogen lamp 40 and the reflector 41 is radiated to the outside or blocked through the opening 43.
　筐体４２の内部空間に、ハロゲンランプ４０が位置する。ハロゲンランプ４０は、細長な円筒形状であり、左右方向９が長手方向である。筐体４２の内部空間において、ハロゲンランプ４０の上方に、反射板４１が位置する。反射板４１は、セラミック膜などがコーティングされた金属板であり、開口４３付近を中心軸とする円弧形状に湾曲している。なお、反射板４１に代えて、セラミック膜などがコーティングされたハロゲンランプ４０が用いられてもよい。 The halogen lamp 40 is located in the internal space of the housing 42. The halogen lamp 40 has an elongated cylindrical shape, and the left-right direction 9 is the longitudinal direction. In the internal space of the housing 42, the reflector 41 is located above the halogen lamp 40. The reflector 41 is a metal plate coated with a ceramic film or the like, and is curved in an arc shape with the vicinity of the opening 43 as the central axis. Instead of the reflector 41, a halogen lamp 40 coated with a ceramic film or the like may be used.
　ヒータ３８は、開口４３の下方を通過するシート６、またはシート６に付着したインクの少なくとも一方を加熱する。本実施形態では、ヒータ３８は、シート６及びインクの双方を加熱する。インクが加熱されることによって、樹脂微粒子がガラス転移し、ヒータ３８の下方を通過したシート６が冷えることによって、ガラス転移した樹脂が硬化する。これにより、シート６にインクが定着される。 The heater 38 heats at least one of the sheet 6 passing under the opening 43 and the ink adhering to the sheet 6. In this embodiment, the heater 38 heats both the sheet 6 and the ink. When the ink is heated, the resin fine particles are transferred to the glass, and the sheet 6 that has passed under the heater 38 is cooled, so that the glass-transferred resin is cured. As a result, the ink is fixed on the sheet 6.
　なお、ヒータ３８は、シート又はインクを加熱可能なものであれば、ハロゲンヒータに限らない。例えば、ヒータ３８は、カーボンヒータ、ドライヤー、オーブン、ベルトコンベアオーブン等であってもよい。 The heater 38 is not limited to a halogen heater as long as it can heat a sheet or ink. For example, the heater 38 may be a carbon heater, a dryer, an oven, a belt conveyor oven, or the like.
［キャップ７１及びワイパ７２］
　図３に示されるように、キャップ７１は、ゴム等の弾性材料により構成される。キャップ７１は、メンテナンス位置の印刷ヘッド３４の下方に位置する。キャップ７１は、上方に向かって開口するカップ形状である。キャップ７１は、上下方向７に移動可能である。図３において破線で示されるように、キャップ７１は、メンテナンス位置にある印刷ヘッド３４のノズル面３３Ａに密着して、全てのノズル３３の開口を覆う。 [Cap 71 and wiper 72]
As shown in FIG. 3, the cap 71 is made of an elastic material such as rubber. The cap 71 is located below the print head 34 in the maintenance position. The cap 71 has a cup shape that opens upward. The cap 71 can be moved in the vertical direction 7. As shown by the broken line in FIG. 3, the cap 71 is in close contact with the nozzle surface 33A of the print head 34 at the maintenance position and covers all the nozzle 33 openings.
　キャップ７１には、廃インクチューブ７１Ａが接続されている。具体的には、キャップ７１の底部には排出口が形成されている。排出口には、廃インクチューブ７１Ａの一端が流体連通可能に接続されている。廃インクチューブ７１Ａの他端は、廃インクタンク（図示せず）と接続されている。 A waste ink tube 71A is connected to the cap 71. Specifically, a discharge port is formed at the bottom of the cap 71. One end of the waste ink tube 71A is connected to the discharge port so that fluid can communicate with the discharge port. The other end of the waste ink tube 71A is connected to a waste ink tank (not shown).
　印刷ヘッド３４は、キャップ７１に覆われた状態で、フラッシング処理又はパージ処理が実行される。フラッシング処理又はパージ処理によって、印刷ヘッド３４内のインクは強制的に排出される。印刷ヘッド３４から排出されたインクは、キャップ７１により受けられ、廃インクチューブ７１Ａを介して廃インクタンクに案内される。 The print head 34 is covered with a cap 71, and a flushing process or a purge process is executed. The ink in the print head 34 is forcibly ejected by the flushing process or the purging process. The ink discharged from the print head 34 is received by the cap 71 and guided to the waste ink tank via the waste ink tube 71A.
　図３に示されるように、ワイパ７２は、キャップ７１の側方において上下方向７に移動可能である。ワイパ７２は、ゴム等の弾性材料で構成されたワイパーブレードの先端を上向きに保持しつつ、上下方向７に移動する。ワイパ７２が上方に位置するとき、左右方向９に沿って移動する印刷ヘッド３４のノズル面３３Ａに、ワイパブレードの先端部７２Ａが当接する。これにより、印刷ヘッド３４のノズル面３３Ａに付着したインク滴が、ワイパ７２によって拭い取られる。 As shown in FIG. 3, the wiper 72 can move up and down 7 on the side of the cap 71. The wiper 72 moves in the vertical direction 7 while holding the tip of the wiper blade made of an elastic material such as rubber upward. When the wiper 72 is positioned upward, the tip portion 72A of the wiper blade abuts on the nozzle surface 33A of the print head 34 that moves along the left-right direction 9. As a result, the ink droplets adhering to the nozzle surface 33A of the print head 34 are wiped off by the wiper 72.
［クリーニング部材７４］
　図３に示されるように、印刷ヘッド３４の下方には、クリーニング部材７４が位置する。クリーニング部材７４は、クリーナキャリッジ７５、及びワイパクリーナ７６を備えている。クリーナキャリッジ７５は、上面視で矩形形状の外形を有する樹脂製の枠体である。ワイパクリーナ７６は、クリーナキャリッジ７５に支持されている。ワイパクリーナ７６は、概ね直方体形状を有する。ワイパクリーナ７６は、ワイパ７２の先端部７２Ａに付着したインクを拭うフォーム（発泡体）であって、例えばメラミンフォームなどが挙げられる。ワイパクリーナ７６は、クリーニング液を保持する。ワイパクリーナ７６の下面は、前後方向８及び左右方向９に沿っており、図３に実線で示されるように下方（クリーニング位置）に位置するワイパ７２の先端部７２Ａよりも若干下方に位置する。ワイパクリーナ７６の上面及び上部は、下方（クリーニング位置）に位置するワイパ７２の先端部７２Ａよりも上方に位置する [Cleaning member 74]
As shown in FIG. 3, a cleaning member 74 is located below the print head 34. The cleaning member 74 includes a cleaner carriage 75 and a wiper cleaner 76. The cleaner carriage 75 is a resin frame having a rectangular outer shape when viewed from above. The wiper cleaner 76 is supported by the cleaner carriage 75. The wiper cleaner 76 has a substantially rectangular parallelepiped shape. The wiper cleaner 76 is a foam (foam) that wipes the ink adhering to the tip portion 72A of the wiper 72, and examples thereof include melamine foam. The wiper cleaner 76 holds the cleaning liquid. The lower surface of the wiper cleaner 76 is located along the front-rear direction 8 and the left-right direction 9, and is located slightly below the tip portion 72A of the wiper 72 located below (cleaning position) as shown by a solid line in FIG. The upper surface and the upper portion of the wiper cleaner 76 are located above the tip portion 72A of the wiper 72 located below (cleaning position).
［インクの組成］
　以下、タンク７０に貯留されるインク（水性インクの一例）の詳細が説明される。本実施形態においては、インクは、顔料としての樹脂分散顔料（色材の一例）と、樹脂微粒子と、水溶性有機溶剤と、水と、を含む。 [Ink composition]
Hereinafter, details of the ink (an example of water-based ink) stored in the tank 70 will be described. In the present embodiment, the ink contains a resin-dispersed pigment (an example of a coloring material) as a pigment, resin fine particles, a water-soluble organic solvent, and water.
　顔料は、分散剤を伴わずに分散可能な自己分散顔料であってもよいし、樹脂分散顔料であってもよい。樹脂分散顔料は、例えば、顔料分散用樹脂（樹脂分散剤）によって、水に分散可能なものである。樹脂分散顔料は、特に限定されず、例えば、カーボンブラック、無機顔料及び有機顔料等があげられる。カーボンブラックとしては、例えば、ファーネスブラック、ランプブラック、アセチレンブラック、チャンネルブラック等があげられる。無機顔料としては、例えば、酸化チタン、酸化鉄系無機顔料及びカーボンブラック系無機顔料等があげられる。有機顔料としては、例えば、アゾレーキ、不溶性アゾ顔料、縮合アゾ顔料、キレートアゾ顔料等のアゾ顔料；フタロシアニン顔料、ペリレン及びペリノン顔料、アントラキノン顔料、キナクリドン顔料、ジオキサジン顔料、チオインジゴ顔料、イソインドリノン顔料、キノフタロン顔料等の多環式顔料；塩基性染料型レーキ顔料、酸性染料型レーキ顔料等の染料レーキ顔料；ニトロ顔料；ニトロソ顔料；アニリンブラック昼光蛍光顔料；等があげられる。これら以外の樹脂分散顔料としては、例えば、Ｃ．Ｉ．ピグメントブラック１、６及び７；Ｃ．Ｉ．ピグメントイエロー１、２、３、１２、１３、１４、１５、１６、１７、５５、７３、７４、７５、７８、８３、９３、９４、９５、９７、９８、１１４、１２８、１２９、１３８、１５０、１５１、１５４、１８０、１８５及び１９４；Ｃ．Ｉ．ピグメントオレンジ３１及び４３；Ｃ．Ｉ．ピグメントレッド２、３、５、６、７、１２、１５、１６、４８、４８：１、４８：３、５３：１、５７、５７：１、１１２、１２２、１２３、１３９、１４４、１４６、１４９、１５０、１６６、１６８、１７５、１７６、１７７、１７８、１８４、１８５、１９０、２０２、２０９、２２１、２２２、２２４、２３８及び２５４；Ｃ．Ｉ．ピグメントバイオレット１９及び１９６；Ｃ．Ｉ．ピグメントブルー１、２、３、１５、１５：１、１５：２、１５：３、１５：４、１６、２２及び６０；Ｃ．Ｉ．ピグメントグリーン７及び３６；並びにこれらの顔料の固溶体等があげられる。なお、インクは、樹脂分散顔料に加え、さらに、他の顔料及び染料等を含んでもよい。また、インクは、色材として染料のみを含んでいてもよい。 The pigment may be a self-dispersing pigment that can be dispersed without a dispersant, or a resin-dispersed pigment. The resin-dispersed pigment can be dispersed in water by, for example, a pigment-dispersing resin (resin dispersant). The resin dispersion pigment is not particularly limited, and examples thereof include carbon black, inorganic pigments, and organic pigments. Examples of carbon black include furnace black, lamp black, acetylene black, and channel black. Examples of the inorganic pigment include titanium oxide, iron oxide-based inorganic pigment, carbon black-based inorganic pigment, and the like. Examples of the organic pigment include azo pigments such as azolake, insoluble azo pigment, condensed azo pigment, and chelate azo pigment; phthalocyanine pigment, perylene and perinone pigment, anthraquinone pigment, quinacridone pigment, dioxazine pigment, thioindigo pigment, isoindolinone pigment, and quinophthalone. Polycyclic pigments such as pigments; dye lake pigments such as basic dye type lake pigments and acidic dye type lake pigments; nitro pigments; nitroso pigments; aniline black daylight fluorescent pigments; and the like. Examples of resin dispersion pigments other than these include C.I. I. Pigment Black 1, 6 and 7; C.I. I. Pigment Yellow 1, 2, 3, 12, 13, 14, 15, 16, 17, 55, 73, 74, 75, 78, 83, 93, 94, 95, 97, 98, 114, 128, 129, 138, 150, 151, 154, 180, 185 and 194; C.I. I. Pigment Oranges 31 and 43; C.I. I. Pigment Red 2, 3, 5, 6, 7, 12, 15, 16, 48, 48: 1, 48: 3, 53: 1, 57, 57: 1, 112, 122, 123, 139, 144, 146, 149, 150, 166, 168, 175, 176, 177, 178, 184, 185, 190, 202, 209, 221, 222, 224, 238 and 254; C.I. I. Pigment Violet 19 and 196; C.I. I. Pigment Blue 1, 2, 3, 15, 15: 1, 15: 2, 15: 3, 15: 4, 16, 22 and 60; C.I. I. Pigment Greens 7 and 36; and solid solutions of these pigments. In addition to the resin-dispersed pigment, the ink may further contain other pigments, dyes and the like. Further, the ink may contain only a dye as a coloring material.
　インク全量における樹脂分散顔料の顔料固形分含有量は、特に限定されず、例えば、所望の光学濃度又は彩度等により、適宜決定できる。顔料固形分含有量は、顔料のみの質量であり、樹脂微粒子の質量は含まない。樹脂分散顔料は、１種類を単独で用いてもよいし、２種類以上を併用してもよい。 The pigment solid content of the resin dispersion pigment in the total amount of the ink is not particularly limited, and can be appropriately determined, for example, depending on the desired optical density or saturation. The pigment solid content is the mass of the pigment only, and does not include the mass of the resin fine particles. One type of resin dispersion pigment may be used alone, or two or more types may be used in combination.
　樹脂微粒子としては、例えば、メタクリル酸及びアクリル酸の少なくとも一方をモノマーとして含むものを用いることができ、例えば、市販品を用いてもよい。樹脂微粒子は、例えば、モノマーとして、さらに、スチレン、塩化ビニル等を含んでもよい。樹脂微粒子は、例えば、樹脂エマルジョンに含まれるものであってもよい。樹脂エマルジョンは、例えば、樹脂微粒子と、分散媒（例えば、水等）とで構成されるものである。樹脂微粒子は、分散媒に対して溶解状態ではなく、特定の粒子径の範囲で分散している。樹脂エマルジョンに含まれる樹脂微粒子としては、例えば、アクリル酸系樹脂、マレイン酸系エステル樹脂、酢酸ビニル系樹脂、カーボネート型樹脂、ポリカーボネート型樹脂、スチレン系樹脂、エチレン系樹脂、ポリエチレン系樹脂、プロピレン系樹脂、ポリプロピレン系樹脂、ウレタン系樹脂、ポリウレタン系樹脂、ポリエステル系樹脂及びこれらの共重合体樹脂等があげられる。インク全量における樹脂微粒子の含有量は、特に限定されない。樹脂微粒子は、１種類を単独で用いてもよいし、２種類以上を併用してもよい。 As the resin fine particles, for example, those containing at least one of methacrylic acid and acrylic acid as a monomer can be used, and for example, a commercially available product may be used. The resin fine particles may further contain, for example, styrene, vinyl chloride, or the like as the monomer. The resin fine particles may be contained in, for example, a resin emulsion. The resin emulsion is composed of, for example, resin fine particles and a dispersion medium (for example, water or the like). The resin fine particles are not in a dissolved state with respect to the dispersion medium, but are dispersed in a specific particle size range. Examples of the resin fine particles contained in the resin emulsion include acrylic acid-based resin, maleic acid-based ester resin, vinyl acetate-based resin, carbonate-type resin, polycarbonate-type resin, styrene-based resin, ethylene-based resin, polyethylene-based resin, and propylene-based resin. Examples thereof include resins, polypropylene-based resins, urethane-based resins, polyurethane-based resins, polyester-based resins, and copolymer resins thereof. The content of the resin fine particles in the total amount of the ink is not particularly limited. One type of resin fine particles may be used alone, or two or more types may be used in combination.
　水溶性有機溶剤としては、例えば、グリセリン、トリエチレングリコール、ブチレングリコール、ジプロピレングリコール、トリプロピレングリコール、チオジグリコール、トリメチロールプロパン、トリメチロールエタン、ポリエチレングリコール、ポリプロピレングリコール等があげられる。これらの有機溶剤は、１種類を単独で用いてもよいし、２種類以上を併用してもよい。 Examples of the water-soluble organic solvent include glycerin, triethylene glycol, butylene glycol, dipropylene glycol, tripropylene glycol, thiodiglycol, trimethylolpropane, trimethylolethane, polyethylene glycol, polypropylene glycol and the like. One type of these organic solvents may be used alone, or two or more types may be used in combination.
　水は、イオン交換水又は純水であることが好ましい。 The water is preferably ion-exchanged water or pure water.
　インクは、必要に応じて、さらに、従来公知の添加剤を含んでもよい。添加剤としては、例えば、界面活性剤、ｐＨ調整剤、表面張力調整剤、防黴剤等があげられる。粘度調整剤は、例えば、ポリビニルアルコール、セルロース、水溶性樹脂等があげられる。 The ink may further contain a conventionally known additive, if necessary. Examples of the additive include a surfactant, a pH adjuster, a surface tension adjuster, an antifungal agent and the like. Examples of the viscosity adjusting agent include polyvinyl alcohol, cellulose, and water-soluble resins.
　インクは、例えば、樹脂分散顔料と、樹脂微粒子と、特定有機溶剤と、水と、必要に応じて他の添加成分とを、従来公知の方法で均一に混合し、フィルタ等で不溶解物を除去することにより調製できる。 For the ink, for example, a resin dispersion pigment, resin fine particles, a specific organic solvent, water, and if necessary, other additive components are uniformly mixed by a conventionally known method, and an insoluble matter is removed by a filter or the like. It can be prepared by removing it.
［クリーニング液の組成］
　以下、クリーニング部材７４のワイパクリーナ７６に保持されるクリーニング液の詳細が説明される。クリーニング液は、水溶性有機溶剤と、水と、を含む。 [Composition of cleaning liquid]
Hereinafter, the details of the cleaning liquid held in the wiper cleaner 76 of the cleaning member 74 will be described. The cleaning liquid contains a water-soluble organic solvent and water.
　水溶性有機溶剤の２０℃における飽和蒸気圧が０．１ｈＰａ以下であることが好ましく、更に好ましくは２０℃における飽和蒸気圧が０．０２ｈＰａ以下である。水溶性有機溶剤の飽和蒸気圧がこの範囲であることにより、クリーニング液から水溶性有機溶剤が揮発しにくい。その結果、ワイパ７２に付着したインクとワイパクリーナ７６に保持されたクリーニング液とが置換されやすく、ワイパ７２のクリーニング効果が長時間保持される。水溶性有機溶剤としては、例えば、グリセリン、ジエチレングリコール、トリエチレングリコール、ブチレングリコール、プロピレングリコール、ジプロピレングリコール、トリプロピレングリコール、チオジグリコール、ポリエチレングリコール、ポリプロピレングリコール等があげられる。これらの水溶性有機溶剤は、１種類を単独で用いてもよいし、２種類以上を併用してもよい。クリーニング液全量における水溶性有機溶剤の含有量は、５０質量％以上であることが好ましく、更に好ましくは７０質量％以上である。ポリエチレングリコールの平均分子量は、例えば１８０～２００である。 The saturated vapor pressure of the water-soluble organic solvent at 20 ° C. is preferably 0.1 hPa or less, and more preferably the saturated vapor pressure at 20 ° C. is 0.02 hPa or less. When the saturated vapor pressure of the water-soluble organic solvent is in this range, the water-soluble organic solvent is less likely to volatilize from the cleaning liquid. As a result, the ink adhering to the wiper 72 and the cleaning liquid held in the wiper cleaner 76 are easily replaced, and the cleaning effect of the wiper 72 is maintained for a long time. Examples of the water-soluble organic solvent include glycerin, diethylene glycol, triethylene glycol, butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, thiodiglycol, polyethylene glycol, polypropylene glycol and the like. One of these water-soluble organic solvents may be used alone, or two or more of them may be used in combination. The content of the water-soluble organic solvent in the total amount of the cleaning liquid is preferably 50% by mass or more, more preferably 70% by mass or more. The average molecular weight of polyethylene glycol is, for example, 180-200.
　水は、イオン交換水又は純水であることが好ましい。クリーニング液全量における水の含有量は、例えば、５０質量％以下であることが好ましく、更に好ましくは３０質量％以下である。水の含有量は、例えば、他の成分の残部としてもよい。 The water is preferably ion-exchanged water or pure water. The content of water in the total amount of the cleaning liquid is, for example, preferably 50% by mass or less, and more preferably 30% by mass or less. The water content may be, for example, the balance of other components.
　クリーニング液の粘度は、１２０ｍＰａ・Ｓ以下であることが好ましく、更に好ましくは、８０ｍＰａ・Ｓ以下であり、特に好ましくは、５ｍＰａ・Ｓ以上８０ｍＰａ・Ｓ以下の範囲内である。 The viscosity of the cleaning liquid is preferably 120 mPa · S or less, more preferably 80 mPa · S or less, and particularly preferably 5 mPa · S or more and 80 mPa · S or less.
　クリーニング液の密度（Ｂ）は、インクの密度（Ａ）に対して（式１）の関係であることが好ましくは、更に好ましくは（式２）の関係である。
　（式１）　Ｂ＞Ａ
　（式２）　Ｂ－Ａ≧０．０３ The density (B) of the cleaning liquid preferably has a relationship of (formula 1) with respect to the density (A) of the ink, and more preferably has a relationship of (formula 2).
(Equation 1) B> A
(Equation 2) BA ≧ 0.03
［ワイパ７２のクリーニング動作］
　図３において実線で示されるように、先端部７２Ａを上方へ向けたワイパ７２が印刷ヘッド３４よりも下方に位置するときに、クリーニング部材７４が左右方向９に沿って移動すると、ワイパ７２の先端部７２Ａに、ワイパクリーナ７６の下面及び下部が当接する。ワイパ７２の先端部７２Ａにクリーニング液が付着することによって、先端部７２Ａに付着していたインクがワイパクリーナ７６に流動して吸収される。クリーニング部材７４が、ワイパ７２の先端部７２Ａに当接しつつ、左右方向９に往復して移動することによって、先端部７２Ａに付着しているインクがクリーニングされる。 [Cleaning operation of wiper 72]
As shown by the solid line in FIG. 3, when the wiper 72 with the tip portion 72A facing upward is located below the print head 34 and the cleaning member 74 moves along the left-right direction 9, the tip of the wiper 72 The lower surface and the lower portion of the wiper cleaner 76 abut on the portion 72A. When the cleaning liquid adheres to the tip portion 72A of the wiper 72, the ink adhering to the tip portion 72A flows to the wiper cleaner 76 and is absorbed. The cleaning member 74 reciprocates in the left-right direction 9 while abutting on the tip portion 72A of the wiper 72, whereby the ink adhering to the tip portion 72A is cleaned.
　クリーニング動作において、ワイパクリーナ７６の上面及び上部は、ワイパ７２の先端部７２Ａに当接しない。したがって、図４（Ａ）に示されるように、ワイパ７２の先端部７２Ａからワイパクリーナ７６に流動したインク５は、クリーニング動作の直後は、ワイパクリーナ７６の下面付近に存在する。インク５の密度（Ａ）は、クリーニング液の密度（Ｂ）よりも小さいので（Ｂ＞Ａ）、時間の経過に伴って、図４（Ｂ）に示されるように、ワイパクリーナ７６の下面付近に存在するインク５が上方に移動する。これにより、その後のクリーニング動作においては、インク５が殆ど存在しないワイパクリーナ７６の下面及び下部に、ワイパ７２の先端部７２Ａが当接することとなる。 In the cleaning operation, the upper surface and the upper portion of the wiper cleaner 76 do not come into contact with the tip portion 72A of the wiper 72. Therefore, as shown in FIG. 4A, the ink 5 flowing from the tip end portion 72A of the wiper 72 to the wiper cleaner 76 exists near the lower surface of the wiper cleaner 76 immediately after the cleaning operation. Since the density (A) of the ink 5 is smaller than the density (B) of the cleaning liquid (B> A), with the passage of time, as shown in FIG. 4 (B), near the lower surface of the wiper cleaner 76. The ink 5 present in the above moves upward. As a result, in the subsequent cleaning operation, the tip portion 72A of the wiper 72 comes into contact with the lower surface and the lower portion of the wiper cleaner 76 in which the ink 5 is scarcely present.
　なお、クリーニング部材７４は、ワイパ７２が先端部７２を上方へ向けた姿勢において、先端部７２Ａより上方に位置しつつ相対移動するものであれば、必ずしもワイパクリーナ７６の下面が前後方向８及び左右方向９に沿っていなくてもよい。例えば、図５（Ａ）に示されるように、クリーニング部材７４は、ワイパクリーナ７６の下面が水平方向（左右方向９）に対して傾斜した状態で、クリーニング動作においてワイパ７２の先端部７２Ａに対して相対移動してもよい。 If the cleaning member 74 moves relative to the wiper 72 while being positioned above the tip 72A in a posture in which the wiper 72 faces upward, the lower surface of the wiper cleaner 76 does not necessarily move in the front-rear direction 8 and left and right. It does not have to be along the direction 9. For example, as shown in FIG. 5A, the cleaning member 74 is in a state where the lower surface of the wiper cleaner 76 is inclined with respect to the horizontal direction (horizontal direction 9), and the cleaning member 74 refers to the tip portion 72A of the wiper 72 in the cleaning operation. May move relative to each other.
　また、クリーニング部材７４は、ワイパ７２の先端部７２Ａと接触する接触部分と、当該接触部分より上方に位置しており、ワイパ７２の先端部７２Ａと接触しない非接触部分と、を有すればよい。例えば、図５（Ｂ）に示されるように、ワイパクリーナ７６においてワイパ７２と接触する面が上下方向７に沿っており、ワイパ７２の先端部７２Ａが前後方向８又は左右方向９（図５（Ｂ）では左右方向９）に沿った側方に向いた状態で、クリーニング部材７４に対して相対移動してもよい。このとき、ワイパ７２の先端部７２Ａが、ワイパクリーナ７６の上部７６Ｕまで相対移動しなければ、ワイパクリーナ７６の上部７６Ｕが非接触部分となる。そして、ワイパクリーナ７６の下部７６Ｌが接触部分となる。したがって、ワイパ７２の先端部７２Ａからワイパクリーナ７６の下部７６Ｌに流動したインクは、時間の経過に伴って、ワイパクリーナ７６の上部７６Ｕに移動する。 Further, the cleaning member 74 may have a contact portion that comes into contact with the tip portion 72A of the wiper 72 and a non-contact portion that is located above the contact portion and does not come into contact with the tip portion 72A of the wiper 72. .. For example, as shown in FIG. 5B, the surface of the wiper cleaner 76 in contact with the wiper 72 is along the vertical direction 7, and the tip portion 72A of the wiper 72 is in the front-rear direction 8 or the left-right direction 9 (FIG. 5 (FIG. 5). In B), it may move relative to the cleaning member 74 while facing sideways along the left-right direction 9). At this time, if the tip portion 72A of the wiper 72 does not move relative to the upper portion 76U of the wiper cleaner 76, the upper portion 76U of the wiper cleaner 76 becomes a non-contact portion. Then, the lower portion 76L of the wiper cleaner 76 becomes a contact portion. Therefore, the ink flowing from the tip portion 72A of the wiper 72 to the lower portion 76L of the wiper cleaner 76 moves to the upper portion 76U of the wiper cleaner 76 with the passage of time.
　以下、本発明の実施例について比較例と併せて説明する。なお、本発明は、下記の実施例及び比較例により限定及び制限されない。 Hereinafter, examples of the present invention will be described together with comparative examples. The present invention is not limited or limited by the following examples and comparative examples.
［顔料分散液Ａ］
　顔料（カーボンブラック）２０質量％、スチレン－アクリル酸共重合体の水酸化ナトリウム中和物７質量％（酸価１７５ｍｇＫＯＨ／ｇ、分子量１００００）に、純水を加えて全体を１００質量％とし、攪拌混合して混合物を得た。この混合物を、０．３ｍｍ径ジルコニアビーズを充填した湿式サンドミルに入れて、６時間分散処理を行った。その後、ジルコニアビーズをセパレータにより取り除き、孔径３．０μｍセルロースアセテートフィルタでろ過することにより、顔料分散液Ａを得た。なお、スチレン－アクリル酸共重合体は、一般に顔料の分散剤として用いられる水溶性のポリマーである。 [Pigment dispersion A]
Pure water was added to 20% by mass of the pigment (carbon black) and 7% by mass of the neutralized sodium hydroxide of the styrene-acrylic acid copolymer (acid value 175 mgKOH / g, molecular weight 10000) to make the whole 100% by mass. The mixture was stirred and mixed to obtain a mixture. This mixture was placed in a wet sand mill filled with 0.3 mm diameter zirconia beads and subjected to a dispersion treatment for 6 hours. Then, the zirconia beads were removed by a separator and filtered through a cellulose acetate filter having a pore size of 3.0 μm to obtain a pigment dispersion liquid A. The styrene-acrylic acid copolymer is a water-soluble polymer generally used as a dispersant for pigments.
［インクの調製］
　以下の成分を表１に示す組成における樹脂微粒子及び樹脂分散顔料分散液を除いた成分を均一に混合してインク溶媒を得た。つぎに、樹脂微粒子を加え、均一に混合した後、樹脂分散顔料分散液を加えて全体を１００質量％として混合物を得た。得られた混合物を、東洋濾紙（株）製のセルロースアセテートタイプメンブレンフィルタ（孔径３．００μｍ
）でろ過することで、インク１，２をそれぞれ得た。
　樹脂微粒子：星光ＰＭＣ（株）製の「ハイロース－Ｘ（登録商標）ＱＥ－１０４２」
　水溶性有機溶剤：プロピレングリコール（２０℃における飽和蒸気圧：０．１ｈＰａ）、グリセリン（２０℃における飽和蒸気圧：０．００１ｈＰａ）
　界面活性剤：日信化学工業（株）製「オルフィン（登録商標）Ｅ１０１０」 [Ink preparation]
The following components were uniformly mixed except for the resin fine particles and the resin dispersion pigment dispersion in the composition shown in Table 1 to obtain an ink solvent. Next, the resin fine particles were added and mixed uniformly, and then the resin dispersion pigment dispersion was added to make the whole 100% by mass to obtain a mixture. The obtained mixture was used as a cellulose acetate type membrane filter (pore size 3.00 μm) manufactured by Toyo Filter Paper Co., Ltd.
) To obtain inks 1 and 2, respectively.
Resin fine particles: "High Loose-X (registered trademark) QE-1042" manufactured by Seiko PMC Corporation
Water-soluble organic solvent: Propylene glycol (saturated vapor pressure at 20 ° C: 0.1 hPa), glycerin (saturated vapor pressure at 20 ° C: 0.001 hPa)
Surfactant: "Orfin (registered trademark) E1010" manufactured by Nissin Chemical Industry Co., Ltd.
［クリーニング液の調製］
　水に対して水溶性有機溶剤を表２に示す配合量として均一に混合して実施例１～８、及び比較例１～３のクリーニング液を得た。
　水溶性有機溶剤：グリセリン（２０℃における飽和蒸気圧：０．００１ｈＰａ）、ジエチレングリコール（２０℃における飽和蒸気圧：０．０３ｈＰａ）、プロピレングリコール（２０℃における飽和蒸気圧：０．１ｈＰａ）、トリエチレングリコールブチルエーテル（２０℃における飽和蒸気圧：０．０１ｈＰａ） [Preparation of cleaning liquid]
The cleaning liquids of Examples 1 to 8 and Comparative Examples 1 to 3 were obtained by uniformly mixing the water-soluble organic solvent with water in the blending amounts shown in Table 2.
Water-soluble organic solvent: glycerin (saturated vapor pressure at 20 ° C.: 0.001 hPa), diethylene glycol (saturated vapor pressure at 20 ° C.: 0.03 hPa), propylene glycol (saturated vapor pressure at 20 ° C.: 0.1 hPa), triethylene Glycer butyl ether (saturated vapor pressure at 20 ° C: 0.01 hPa)
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
［インクの上昇］
　実施例１～８及び比較例１～３のクリーニング液をメラミンフォーム（表面積４００ｍｍ２、厚み５ｍｍ）に吸収させた。そのメラミンフォームの下面から、２μＬのインク１又はインク２を接触させて、メラミンフォームにインクを吸収させた。１時間後及び２時間後にメラミンフォームをそれぞれ裁断して、その断面を観察して、下記基準に従って評価した。
ＡＡ：１時間後にメラミンフォームの上部までインクが上昇していた。
Ａ：２時間後にメラミンフォームの上部までインクが上昇していた。
Ｃ：２時間後にメラミンフォームの上部までインクが上昇していなかった。 [Ink rise]
The cleaning liquids of Examples 1 to 8 and Comparative Examples 1 to 3 were absorbed into melamine foam (surface area 400 mm 2 , thickness 5 mm). 2 μL of ink 1 or ink 2 was brought into contact with the lower surface of the melamine foam to cause the melamine foam to absorb the ink. After 1 hour and 2 hours, the melamine foam was cut, and the cross section thereof was observed and evaluated according to the following criteria.
AA: After 1 hour, the ink had risen to the top of the melamine foam.
A: After 2 hours, the ink had risen to the top of the melamine foam.
C: After 2 hours, the ink did not rise to the top of the melamine foam.
［クリーニング液の保持性］
　実施例１～８及び比較例１～３のクリーニング液をメラミンフォーム（表面積１００ｍｍ２、厚み１００ｍｍ）に吸収させた。２４時間後にメラミンフォームを観察して、下記基準に従って評価した。
ＡＡ：メラミンフォームに吸収させたクリーニング液の２４時間後の液面が、上面から２０ｍｍ以下の高さにある。
Ａ：メラミンフォームに吸収させたクリーニング液の２４時間後の液面が、上面から２０ｍｍより下方の高さにある。 [Cleaning liquid retention]
The cleaning liquids of Examples 1 to 8 and Comparative Examples 1 to 3 were absorbed into melamine foam (surface area 100 mm 2 , thickness 100 mm). After 24 hours, melamine foam was observed and evaluated according to the following criteria.
AA: The liquid level of the cleaning liquid absorbed by the melamine foam after 24 hours is at a height of 20 mm or less from the upper surface.
A: The liquid level of the cleaning liquid absorbed by the melamine foam after 24 hours is at a height below 20 mm from the upper surface.
　実施例１～８及び比較例１～３の評価結果を表２に示す。 Table 2 shows the evaluation results of Examples 1 to 8 and Comparative Examples 1 to 3.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表２に示すとおり、実施例１～８では、インクの上昇にＣ評価がなかったが、比較例１～３では、インクの上昇がいずれもＣ評価であった。
　また、インクの密度（Ａ）とクリーニング液の密度（Ｂ）との関係が（式２）を満たさない実施例６では、インクの上昇がＡ評価であった。
　また、クリーニング液の粘度が８０ｍＰａ・Ｓより大きい実施例５では、インクの上昇がＡ評価であった。また、クリーニング液の粘度が、５ｍＰａ・Ｓ未満である実施例６では、クリーニング液の保持性がＡ評価であった。 As shown in Table 2, in Examples 1 to 8, there was no C evaluation for the increase in ink, but in Comparative Examples 1 to 3, the increase in ink was C evaluation.
Further, in Example 6 in which the relationship between the ink density (A) and the cleaning liquid density (B) does not satisfy (Equation 2), the increase in ink was evaluated as A.
Further, in Example 5 in which the viscosity of the cleaning liquid was larger than 80 mPa · S, the increase in ink was evaluated as A. Further, in Example 6 in which the viscosity of the cleaning liquid was less than 5 mPa · S, the retention of the cleaning liquid was evaluated as A.
１０・・・記録装置
２８・・・プラテン
３４・・・印刷ヘッド（ヘッド）
７２・・・ワイパ
７２Ａ・・・先端部
７４・・・クリーニング部材 10 ... Recording device 28 ... Platen 34 ... Printing head (head)
72 ... Wiper 72A ... Tip 74 ... Cleaning member

Claims (11)

  1. 　ノズルから水性インクを吐出するヘッドと、
    　上記ヘッドのノズル面を拭う先端部を有するワイパと、
    　上記先端部と接触するクリーニング部材と、
    　上記クリーニング部材に保持されるクリーニング液と、を具備しており、
    　上記水性インクは、色材を含んでおり、
    　上記クリーニング液の粘度は、１２０ｍＰａ・Ｓ以下であり、
    　上記水性インクの密度をＡとし、上記クリーニング液の密度をＢとしたとき、下記式１が成り立つ記録装置。
    　（式１）　Ｂ＞Ａ     A head that ejects water-based ink from the nozzle,
    A wiper with a tip that wipes the nozzle surface of the head,
    The cleaning member that comes into contact with the tip,
    It is equipped with a cleaning liquid held by the cleaning member.
    The water-based ink contains a coloring material and contains a coloring material.
    The viscosity of the cleaning liquid is 120 mPa · S or less.
    A recording device in which the following formula 1 holds when the density of the water-based ink is A and the density of the cleaning liquid is B.
    (Equation 1) B> A
  2. 　下記式２が成り立つ請求項１に記載の記録装置。
    　（式２）　Ｂ－Ａ≧０．０３     The recording device according to claim 1, wherein the following formula 2 holds.
    (Equation 2) BA ≧ 0.03
  3. 　上記クリーニング液の粘度は、８０ｍＰａ・Ｓ以下である請求項１又は２に記載の記録装置。 The recording device according to claim 1 or 2, wherein the viscosity of the cleaning liquid is 80 mPa · S or less.
  4. 　上記クリーニング液の粘度は、５ｍＰａ・Ｓ以上８０ｍＰａ・Ｓ以下の範囲内である請求項１又は２に記載の記録装置。 The recording device according to claim 1 or 2, wherein the viscosity of the cleaning liquid is in the range of 5 mPa · S or more and 80 mPa · S or less.
  5. 　上記水性インクは、上記色材としての顔料と、水溶性有機溶剤と、水と、を含んでおり、
    　上記クリーニング液は、水溶性有機溶剤を含む請求項１から４のいずれかに記載の記録装置。     The water-based ink contains a pigment as a coloring material, a water-soluble organic solvent, and water.
    The recording device according to any one of claims 1 to 4, wherein the cleaning liquid contains a water-soluble organic solvent.
  6. 　上記水性インクは、樹脂微粒子を更に含む請求項５に記載の記録装置。 The recording device according to claim 5, wherein the water-based ink further contains resin fine particles.
  7. 　上記クリーニング液は、水溶性有機溶剤を含み、
    　上記水溶性有機溶剤は、２０℃における飽和蒸気圧が０．１ｈＰａ以下であり、上記クリーニング液全量に対して５０質量％以上含む請求項１から６のいずれかに記載の記録装置。     The cleaning liquid contains a water-soluble organic solvent and contains
    The recording device according to any one of claims 1 to 6, wherein the water-soluble organic solvent has a saturated vapor pressure of 0.1 hPa or less at 20 ° C. and contains 50% by mass or more with respect to the total amount of the cleaning liquid.
  8. 　上記クリーニング液が含む上記水溶性有機溶剤は、２０℃における飽和蒸気圧が０．０２ｈＰａ以下であり、上記クリーニング液全量に対して５０質量％以上含む請求項７に記載の記録装置。 The recording device according to claim 7, wherein the water-soluble organic solvent contained in the cleaning liquid has a saturated vapor pressure of 0.02 hPa or less at 20 ° C. and contains 50% by mass or more with respect to the total amount of the cleaning liquid.
  9. 　上記クリーニング液は、さらに水を含み、
    　上記クリーニング液全量における水の含有量は、５０質量％以下である請求項７又は８に記載の記録装置。     The above cleaning liquid further contains water and contains
    The recording device according to claim 7 or 8, wherein the content of water in the total amount of the cleaning liquid is 50% by mass or less.
  10. 　上記クリーニング部材は、上記ワイパが上記先端部を上方へ向けた姿勢において、当該先端部より上方に位置しつつ、相対移動するものである請求項１から９のいずれかに記載の記録装置。 The recording device according to any one of claims 1 to 9, wherein the cleaning member moves relative to the wiper while being located above the tip in a posture in which the wiper faces upward.
  11. 　上記クリーニング部材は、上記ワイパの上記先端部と接触する接触部分と、当該接触部分より上方に位置しており、上記ワイパの上記先端部と接触しない非接触部分と、を有する請求項１から１０のいずれかに記載の記録装置。 Claims 1 to 10 have the cleaning member having a contact portion in contact with the tip portion of the wiper and a non-contact portion located above the contact portion and not in contact with the tip portion of the wiper. The recording device according to any one of.
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JP2011079185A (en) * 2009-10-06 2011-04-21 Seiko Epson Corp Inkjet printer
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JP2011079185A (en) * 2009-10-06 2011-04-21 Seiko Epson Corp Inkjet printer
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