Inkjet recording device

Abstract

To provide an inkjet recording device that is capable of performing print head cleaning work, without relying on the skills of an operator.SOLUTION: An inkjet recording device includes: an ink container which stores ink for printing on a printing object; a nozzle which is connected to the ink container and discharges ink fed by pressurization; a charge electrode which charges ink particles discharged from the nozzle; a deflection electrode which deflects the ink particles charged by the charge electrode; a gutter which recovers ink not used for printing; a solvent container which stores a solvent; and a liquid nozzle which is connected to the solvent container and discharges the solvent fed by pressurization. The liquid nozzle includes: a liquid channel part extending from the nozzle in a gutter direction; and a liquid discharge hole which is formed with an angle at which the solvent fed by pressurization hits the nozzle via the liquid channel part.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an inkjet recording device that continuously ejects ink from a nozzle to print on a print-receiving medium. [Background technology]

[0002] Background art relating to this technical field is Patent Document 1. Patent Document 1 discloses a stop processing method for an inkjet recording device having an ink supply flow path connected between an ink container and a nozzle for supplying ink in the ink container toward the nozzle, a solvent supply flow path connected between a solvent container and the nozzle for supplying a solvent to the nozzle, a recovery flow path connected between a gutter for recovering ink not used in printing and the ink container for recovering liquid recovered by the gutter to the ink container, and a suction flow path connected between an inlet of the nozzle and the ink container for guiding liquid to the ink container, the stop processing method for an inkjet recording device being characterized in that when stopping the supply of ink to the nozzle from a printing state in which ink is ejected from the nozzle, the stop processing method includes a cleaning step of the suction flow path for supplying solvent from the solvent supply flow path to the suction flow path, a residual liquid suction step of suctioning outside air from the nozzle into the suction flow path and flowing air into the suction flow path to send the solvent in the suction flow path to the ink container, and a finish cleaning step of flowing solvent from the solvent supply flow path into the suction flow path under a state in which the solvent in the suction flow path has been replaced with air.

[0003] Also, there is Patent Document 2. Patent Document 2 discloses an inkjet recording device having a print head that houses a nozzle for ejecting ink to print on a print medium and a deflection electrode that deflects the ejected ink by electrostatic force, and characterized in that the inkjet recording device is equipped with an ink suction section that sucks in floating ink by electrostatic force. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-861 A [Patent Document 2] International Publication No. 2018 / 105714 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 is premised on cleaning the inside of the nozzle and the inside of the suction flow path, but does not consider cleaning the ink and the like that adheres to the outside of the nozzle. That is, in an inkjet recording device, when the print head and the print medium are close to each other, ink bounces off the print head side when it collides with the print medium, and since the bounced ink is electrically charged, it may be attracted to the deflection electrode inside the print head and contaminate the deflection electrode, and if it is left in this state, there is a possibility that the print quality will deteriorate.

[0006] In Patent Document 2, contamination of the inside and outside of the print head can be suppressed by sucking in floating ink using electrostatic force, but this is not complete and some form of cleaning is necessary.

[0007] Therefore, in the inkjet recording device, when the ink ejection from the nozzles is stopped, the worker operating the device uses a cleaning bottle containing a solvent to clean the main parts inside the print head, such as the nozzles and deflection electrodes (print head cleaning work). However, there is a problem with this print head cleaning work in that the work time required for the print head cleaning work and the degree of ink stain removal after the print head cleaning work is completed vary depending on the skill level of the worker.

[0008] An object of the present invention is to provide an inkjet recording apparatus that allows a print head cleaning operation to be performed stably without relying on the skill of the operator. [Means for solving the problem]

[0009] In view of the above-mentioned background technology and problems, the present invention provides, as an example, an inkjet recording device comprising an ink container for storing ink for printing on a print target, a nozzle connected to the ink container and ejecting ink supplied under pressure, a charging electrode for charging ink particles ejected from the nozzle, a deflection electrode for deflecting ink particles charged by the charging electrode, a gutter for recovering ink not used for printing, a solvent container for storing solvent, and a liquid nozzle connected to the solvent container and ejecting the solvent supplied under pressure, the liquid nozzle having a liquid flow path portion extending from the nozzle toward the gutter, and a liquid ejection hole portion formed at an angle such that the solvent supplied under pressure hits the nozzle via the liquid flow path portion. Effect of the Invention

[0010] According to the present invention, it is possible to provide an inkjet recording apparatus that can perform a stable print head cleaning operation without relying on the skill level of the operator. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a state in which an inkjet recording apparatus according to a first embodiment is used. [Diagram 2] FIG. 2 is a perspective view showing a state in which a print head is set in a cleaning unit in the inkjet recording apparatus in the first embodiment. [Diagram 3] FIG. 2 is a diagram showing a path configuration of the inkjet recording apparatus in the first embodiment. [Figure 4] FIG. 2 is an external perspective view of the print head in the first embodiment. [Diagram 5] 3 is a configuration diagram of a head cleaning unit in a cross section of a head cleaning nozzle in Example 1. FIG. [Figure 6] FIG. 2 is a configuration diagram of a head cleaning unit in a cross section of an air nozzle for drying a head in the first embodiment. [Figure 7] 4 is a cross-sectional view of the head cleaning unit in a state in which a print head is set in the head cleaning unit in the first embodiment. FIG. [Figure 8]FIG. 8 is an enlarged view of the print head and cleaning nozzle in FIG. 7, and the configuration in the vicinity thereof. [Figure 9] 4 is a diagram showing a path configuration of the ink jet recording device in a state in which a print head is set in a head cleaning unit in the first embodiment. FIG. [Figure 10] 4 is a cross-sectional view of the head cleaning unit showing the flow of liquid inside the head cleaning unit when a head cleaning process is being performed in the first embodiment. FIG. [Figure 11] 4 is an enlarged view of the print head, cleaning nozzle, and the surrounding area when a head cleaning process is being performed in the first embodiment. FIG. [Figure 12] 1 is an enlarged view of the print head, the drying nozzle, and the configuration in the vicinity thereof when a head drying process is being performed in Example 1. FIG. [Figure 13] 4 is a diagram showing a state in which a cleaning liquid bottle is removed from the head cleaning unit in the first embodiment. FIG. [Figure 14] FIG. 4 is a flowchart of a head cleaning operation in the first embodiment. [Figure 15] FIG. 4 is a flowchart of a batch head cleaning process in the first embodiment. [Figure 16] FIG. 11 is a perspective view showing a state in which an inkjet recording apparatus according to a second embodiment is used. [Figure 17] FIG. 11 is a perspective view showing a state in which a print head of an inkjet recording device in a second embodiment is set in a head cleaning unit. [Figure 18] 13 is a diagram showing a state in which a print head of a different device is set in a head cleaning unit and head cleaning is being performed in an inkjet recording device in Example 3. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments will be described with reference to the drawings. EXAMPLES

[0013] The usage state of the inkjet recording apparatus 600 in this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a perspective view showing the usage state of the inkjet recording apparatus 600 in this embodiment, and Figure 2 is a perspective view showing the state in which the print head 2 is attached to the head cleaning unit 4 in the inkjet recording apparatus 600 in this embodiment.

[0014] First, as shown in FIG. 1, inkjet recording device 600 includes an inkjet recording device main body 1, a print head 2 connected to the inkjet recording device main body 1 by a conduit (for print head) 5, a head cleaning unit 4 connected to the inkjet recording device main body 1 by a conduit (for head cleaning unit) 6, and a separation panel 3 connected to the inkjet recording device main body 1 by a cable (for separation panel) 7.

[0015] Inkjet recording device 600 is installed on a production line in a factory where foods, beverages, etc. are produced, and inkjet recording device main body 1 is installed in a location where the space required for regular maintenance work, etc. can be secured. Print head 2 is fixed to print head fixing metal fittings 13 installed near belt conveyor 11, and is installed in a position where it can be close to print objects 12A-12B fed in the direction of arrow X on the production line such as belt conveyor 11.

[0016] In such an inkjet recording device 600, a control unit 9 (not shown) provided inside the inkjet recording device main body 1 controls the amount and timing of charging of ink droplets 59B ejected from nozzles 21 attached to the print head 2, and performs printing by causing the charged and deflected ink droplets 59B to adhere to the print object (during printing) 15B while the print object (before printing) 15A passes near the print head 2. Furthermore, a head cover 17 and a protective cover 18 are attached to the print head 2 in order to protect the parts inside the print head 2, and the head cover 17 can be attached and detached using a fixing knob 19.

[0017] The head cleaning unit 4 is installed around the print head 2 and is fixed by fitting a head cleaning unit fixing jig A (for conveyor) 91B attached to the belt conveyor 11 with a head cleaning unit fixing jig B 92 attached to the head cleaning unit 4. The head cleaning unit 4 has a print head insertion section 62 for inserting the print head 2 into the head cleaning unit 4, and a print head fixing section 67 for fixing the print head 2 to the head cleaning unit 4. The inkjet recording device main body 1 has a head cleaning unit fixing jig A (for main body) 91A for fixing the head cleaning unit 4, and the inkjet recording device 600 can be used by removing the head cleaning unit 4 from the head cleaning unit fixing jig A (for conveyor) 91B and replacing it with the head cleaning unit fixing jig A (for main body) 91A.

[0018] Furthermore, the head cleaning unit 4 has a start button 63 for starting the cleaning process of the print head 2, a stop button 64 for stopping the cleaning process of the print head 2, and a display unit 65 for allowing the operator to see confirmation messages and alarms such as warnings and abnormalities. Furthermore, a cleaning liquid bottle 61 is attached to the bottom of the head cleaning unit 4 for storing cleaning liquid 69C used for head cleaning.

[0019] Furthermore, the separation panel 3 is installed around the print head 2 and head cleaning unit 4 for ease of operation by an operator, and is fixed to the belt conveyor 11. The belt conveyor 11 is supported by fixing columns 14 and installed at a position higher than the floor surface, so that it is at a height that is just right for a user to operate the operation display unit 8 of the separation panel 3 and to attach the head cleaning unit 4. In this embodiment, the separation panel 3 and the head cleaning unit 4 are fixed to the belt conveyor 11, but with the inkjet recording apparatus 600 of this embodiment, the separation panel 3 and the head cleaning unit 4 can be freely attached to a location that is easier for the user to operate.

[0020] Next, with reference to Figure 2, the state in which the print head 2 is set in the head cleaning unit 4 in the inkjet recording device 600 will be described. With the head cover 17 removed, the print head 2 is inserted tip-first into the print head insertion part 62 of the head cleaning unit 4. The print head 2 is then fixed and attached to the head cleaning unit 4 by fitting the print head fixing part 67 into the fixing knob 19. By setting the print head 2 in the head cleaning unit 4 in this way, the inkjet recording device 600 in this embodiment is able to clean the print head 2.

[0021] It is preferable that the length of the conduit (for head cleaning unit) 6 connecting the inkjet recording device main body 1 and the head cleaning unit 4 is the same as or longer than the conduit (for print head) 5 connecting the inkjet recording device main body 1 and the print head 2. This is to ensure the degree of freedom in the arrangement of the head cleaning unit 4.

[0022] FIG. 3 is a diagram showing the overall path configuration of the inkjet recording apparatus 600 in this embodiment. First, an ink supply path of the inkjet recording device 600 in this embodiment will be described. In Fig. 3, the inkjet recording device main body 1 is provided with a main ink container 31 that holds circulating ink 59A, and the main ink container 31 is provided with a liquid level sensor 31A that detects whether the liquid in the main ink container 31 has reached a reference liquid level, which is an appropriate amount to be held inside.

[0023] The main ink container 31 is connected to a viscosity meter 45 via a path 801 in order to grasp the viscosity of the ink 59A in the main ink container 31. The viscosity meter 45 is connected to a solenoid valve (for supply) 49 that opens and closes the path via a path 802, and the solenoid valve (for supply) 49 is connected to a pump (for supply) 33 that is used to suck and pressure-feed the ink 59A via a path 803. The pump (for supply) 33 is then connected to a filter (for supply) 39 that removes foreign matter mixed in the ink 59A via a path 804.

[0024] Filter (for supply) 39 is connected via path 805 to pressure regulating valve 46 which adjusts the pressure of ink 59A pumped from pump (for supply) 33 to an appropriate pressure for printing, and pressure regulating valve 46 is connected via path 806 to pressure sensor 47 which measures the pressure of ink 59A supplied to nozzles 21. Pressure sensor 47 is provided in print head 2 via path 807 which passes through conduit (for print head) 5, and is connected to switching valve 26 which controls whether ink 59A is supplied to nozzles 21.

[0025] The switching valve 26 is connected to the nozzle 21 having an outlet for ejecting the ink 59A via a path 808. The switching valve 26 is a three-way solenoid valve, and an ink supply path 807 and a cleaning path 863 are connected to the switching valve 26, so that the supply of ink and solvent to the nozzle 21 can be switched. In the straight direction of the nozzle 21 outlet, there are arranged a charging electrode 23 for adding a predetermined amount of charge to the ink droplets 59B, a deflection electrode 24 for deflecting the ink droplets 59B to be used for printing, and a gutter 25 for capturing the ink droplets 59B that are not used for printing and therefore fly straight without being charged or deflected.

[0026] Next, an ink recovery path of the inkjet recording device 600 in this embodiment will be described. In Fig. 3, the gutter 25 is connected to a filter (for recovery) 40 that removes foreign matter mixed in the ink and is disposed in the inkjet recording device main body 1 via a path 811 that passes through the conduit (for print head) 5, and the filter (for recovery) 40 is connected to an electromagnetic valve (for recovery) 50 that opens and closes the path via a path 812.

[0027] The solenoid valve (for recovery) 50 is connected to a pump (for recovery) 34 that sucks up the ink particles 59B captured by the gutter 25 via a path 813. The pump (for recovery) 34 is connected to the main ink container 31 via a path 814. The main ink container 31 is also connected to an exhaust path 821, and the exhaust path 821 is configured to communicate with the outside of the inkjet recording apparatus main body 1.

[0028] Next, the ink circulation path of the inkjet recording device 600 in this embodiment will be described. The nozzles 21 provided in the print head 2 are connected to an electromagnetic valve (for circulation) 51 provided in the inkjet recording device main body 1 and opening and closing the flow path via a path 831 passing through a conduit (for print head) 5 in addition to the path 808 for ink supply. The electromagnetic valve (for circulation) 51 is connected to a pump (for circulation) 35 that sucks ink from the nozzles 21 via a path 832. The pump (for circulation) 35 is connected to the main ink container 31 via a path 833.

[0029] Next, the solvent supply path of the inkjet recording device 600 in this embodiment will be described. In Fig. 3, the inkjet recording device main body 1 is provided with a solvent container 32 that holds a solvent 69A to be used for supplying a solvent to the main ink container 31, for nozzle cleaning, or for head cleaning, and the solvent container 32 is connected to a pump (for solvent) 36 used for sucking and pumping the solvent via a path 841. The pump (for solvent) 36 is connected to a branch path 851 via a path 842 to change the supply destination of the solvent 69A depending on the purpose. The branch path 851 is connected to an electromagnetic valve (for solvent supply) 52 in the solvent supply path to open and close the flow path via a path 843, and the electromagnetic valve (for solvent supply) 52 is connected to the main ink container 31 via a path 844.

[0030] Next, the nozzle cleaning path of the inkjet recording device 600 in this embodiment will be described. In Fig. 3, the pump (for solvent) 36 is connected to an electromagnetic valve (for nozzle cleaning) 53 for opening and closing the flow path via a branch path 851 and a path 861 in a path 842. The electromagnetic valve (for nozzle cleaning) 53 is connected to a filter (for nozzle cleaning) 41 for removing foreign matter mixed in the solvent 69A via a path 862, and the filter (for nozzle cleaning) 41 is connected to a switching valve 26 provided in the print head 2 via a path 863 for controlling whether or not the solvent 69A for cleaning is sent to the nozzle 21.

[0031] Next, the head cleaning path of the inkjet recording device 600 in this embodiment will be described. In FIG. 3, the pump (for solvent) 36 is connected to an electromagnetic valve (for head cleaning) 54 for opening and closing the flow path via a branch path 851 and a path 871 in the path 842. The electromagnetic valve (for head cleaning) 54 is connected to a filter (for head cleaning) 42 for removing foreign matter mixed in the solvent 69A via a path 872, and the filter (for head cleaning) 42 is provided in the head cleaning unit 4 via a path 873 passing through the conduit (for head cleaning unit) 6, and is connected to a final filter (for head cleaning) 74 for removing foreign matter that may be initially mixed in the path 873. The final filter (for head cleaning) 74 is connected to a head cleaning nozzle 71 provided in a head cleaning tank 73 of the head cleaning unit 4 via a path 874. Here, the space inside the head cleaning tank 73 is configured to communicate with a cleaning liquid bottle 61 installed at the bottom.

[0032] Next, the head drying path of the inkjet recording device 600 in this embodiment will be described. In Fig. 3, the inkjet recording device main body 1 is provided with a pump (for supplying dry air) 37 used for sucking and compressing air, and the pump (for supplying dry air) 37 is connected to a path 881 in which an air suction port communicating with the inside of the inkjet recording device main body 1 is formed, and the pump (for supplying dry air) 37 is connected to an electromagnetic valve (for supplying dry air) 55 for opening and closing the flow path via a path 882. The electromagnetic valve (for supplying dry air) 55 is connected to a head drying air nozzle 72 provided in a head cleaning tank 73 of the head cleaning unit 4 via a path 883 passing through a conduit (for head cleaning unit) 6.

[0033] Next, the configuration of the print head 2 of the inkjet recording device 600 in this embodiment will be described with reference to Fig. 4. Fig. 4 is an external perspective view of the print head in this embodiment. In Fig. 4, (a) shows an external perspective view of the print head 2, and (b) is a perspective view of the print head 2 with the head cover 17 removed.

[0034] 4(a), the print head 2 comprises a head base 16, a conduit (for the print head) 5 connecting the inkjet recording device main body 1 and the print head 2, a protective cover 18 attached to the head base 16 for the purpose of protecting a switching valve 26 (not shown), and a head cover 17 which forms a printing opening 17A through which ink particles used for printing pass and which is attached to the protective cover 18 by a fixing knob 19. With the head cover 17 attached in this manner, the space enclosed by the head base 16 and the head cover 17 is protected from impacts during maintenance, etc. The parts enclosed by the head cover 17 are maintained by a worker who performs daily work, and the internal area enclosed by the head base 16 and the protective cover 18 is an area where so-called service personnel perform maintenance.

[0035] Next, in the print head 2 with the head cover 17 removed as shown in Fig. 4(b), the nozzle 21 for ejecting the ink droplets 59B, the charged electrode 23 arranged parallel and symmetrically with respect to the ink droplets 59B ejected from the nozzle 21, and a set of two deflection electrodes 24 arranged on the secondary side of the charged electrode 23 in the flight direction of the ink droplets 59B are mounted on the head base 16. Furthermore, the head base 16 is provided with a gutter 25 arranged on the secondary side of the deflection electrode 24 in the flight direction of the ink droplets 59B, and having a hole formed on the flight center axis of the ink droplets 59B for capturing the ink droplets 59B not used for printing. Also, the nozzle 21 is connected to a tube (for supply) 808A and a tube (for circulation) 831A made of a solvent-resistant PTFE material.

[0036] Furthermore, a partition member 20 is attached between the head base 16 and the protective cover 18 of the print head 2 so that the inside of the protective cover 18 is not exposed even when the head cover 17 is removed. A temperature sensor 27 for detecting the surrounding temperature is also attached to the partition member 20 of the print head 2. This temperature sensor 27 is used for printing control of the inkjet recording device 600 and control of the head cleaning time.

[0037] Next, the configuration of the head cleaning unit 4 of the inkjet recording apparatus 600 in this embodiment will be described with reference to Figures 5, 6, 7, and 8. Figure 5 is a configuration diagram of the head cleaning unit in this embodiment, showing a cross section of the head cleaning nozzle 71, and Figure 6 is a configuration diagram of the head cleaning unit in this embodiment, showing a cross section of the head drying air nozzle 72. And Figure 7 is a cross-sectional view of the head cleaning unit 4 in this embodiment, showing the state in which the print head 2 is set in the head cleaning unit 4. Figure 8 is an enlarged view of the print head 2 and head cleaning nozzle 71 in Figure 7, and the configuration in the vicinity thereof.

[0038] 5, 6, 7 and 8, the head cleaning unit 4 comprises a head cleaning tank 73 in which the print head 2 is housed during head cleaning, and a cleaning lid block 77 which is installed on top of the head cleaning tank 73 and has a print head insertion portion 62 for setting the print head 2 in the head cleaning unit 4.

[0039] A lid member 83 is attached to the cleaning lid block 77 to prevent dust and other foreign matter from entering the head cleaning tank 73 when the print head 2 is not set through the opening of the print head insertion section 62. The lid member 83 is attached to the cleaning lid block 77 via a lid hinge 82. The lid member 83 is formed with a lid member protrusion 83A to reduce frictional resistance when the print head 2 is inserted into the head cleaning unit 4. The cleaning lid block 77 is also formed with a lid member fitting recess 77E that fits exactly with the lid member 83 to increase the airtightness inside the head cleaning unit 4 when the print head 2 is not set. The cleaning lid block 77 is also formed with a print head insertion hole 77F, which is an opening slightly larger than the dimensions of the insertion section of the print head 2 into the head cleaning unit 4. In this way, the print head insertion section 62 is composed of the print head insertion hole 77F formed in the cleaning lid block 77, the lid member 83, and the like.

[0040] Additionally, the cleaning lid block 77 is fitted with a print head fixing part 67 to stabilize the position of the print head 2 during head cleaning, and a print head guide part 84 to ensure smooth insertion of the print head 2 into the head cleaning unit 4. The print head fixing part 67 forms a fixing knob fitting part 67A, and by fixing the print head 2 to the head cleaning unit 4 via this fixing knob fitting part 67A, it is possible to ensure stability of head cleaning.

[0041] Furthermore, a head cleaning nozzle 71 for spraying a head cleaning solvent 69B toward the print head 2, and a head drying air nozzle 72 for blowing drying air to dry the print head 2 wetted with the solvent 69B after head cleaning are attached to the cleaning cover block 77 by a nozzle fixing plate 75 and a nozzle fixing screw 76. A liquid nozzle fixing groove 71D is formed in the head cleaning nozzle 71, and the nozzle fixing plate 75 is adapted to fit into this liquid nozzle fixing groove 71D, making it easy to assemble the head cleaning nozzle 71. Similarly, an air nozzle fixing groove 72D is formed in the head drying air nozzle 72, and the nozzle fixing plate 75 is adapted to fit into this air nozzle fixing groove 72D, making it easy to assemble the head drying air nozzle 72.

[0042] This head cleaning nozzle 71 has a liquid nozzle outer portion 71F formed in a cylindrical shape, and a liquid nozzle flow path portion 71A formed inside the head cleaning nozzle 71 so as to extend from the nozzle 21 in the direction of the gutter 25 when the print head 2 is set in the head cleaning unit 4. Furthermore, the head cleaning nozzle 71 has a liquid nozzle ejection hole A portion 71B for ejecting the solvent 69B through the liquid nozzle flow path portion 71A so as to aim the solvent 69B at the nozzle 21, i.e., formed at an angle so as to strike the nozzle 21, a liquid nozzle ejection hole B portion 71C for ejecting the solvent 69B through the liquid nozzle flow path portion 71A so as to aim the solvent 69B at the deflection electrode 24, i.e., formed at an angle so as to strike the deflection electrode 24, A liquid nozzle ejection hole C portion 71H (not shown) for ejecting the solvent 69B is formed at an angle so that the solvent 69B is aimed at the charged electrode 23 through the liquid nozzle flow path portion 71A, i.e., so as to hit the charged electrode 23, and a liquid nozzle flat portion 71G is formed by processing a portion of the liquid nozzle outer portion 71F into a flat shape to make it easier to process the liquid nozzle ejection hole A portion 71B, the liquid nozzle ejection hole B portion 71C, and the liquid nozzle ejection hole C portion 71H (not shown).

[0043] In this way, the liquid nozzle flow path section 71A is arranged on the side facing the head base 16 of the nozzle 21, the charging electrode 23, and the deflection electrode 24, and serves as a supply path for the solvent 69B to the liquid nozzle ejection holes that spray the solvent 69B onto each of them.

[0044] The head cleaning nozzle 71 is formed with a liquid nozzle seal portion 71E having a small surface roughness, and this liquid nozzle seal portion 71E is attached to a cleaning lid liquid nozzle attachment portion 77B formed in the cleaning lid block 77 together with a liquid seal member 80 to prevent leakage of the solvent 69B. Here, the liquid nozzle flow path portion 71A formed in the head cleaning nozzle 71 is adapted to be connected to a cleaning lid liquid flow path 77C formed in the cleaning lid block 77.

[0045] The head drying air nozzle 72 is formed with an air nozzle outer portion 72F formed in a cylindrical shape, an air nozzle flow path portion 72A formed inside the head drying air nozzle 72 so as to extend from the nozzle 21 in the direction of the gutter 25 when the print head 2 is set in the head cleaning unit 4, an air nozzle ejection hole A portion 72B connected to the air nozzle flow path portion 72A and for ejecting air to target the space between the charging electrodes 23, an air nozzle ejection hole B portion 72C connected to the air nozzle flow path portion 72A and for ejecting air to target the deflection electrode 24, and an air nozzle flat portion 72G produced by machining a part of the air nozzle outer portion 72F into a flat shape to make it easier to process the air nozzle ejection hole A portion 72B and the air nozzle ejection hole B portion 72C.

[0046] In this way, the air nozzle flow path section 72A is arranged on the side facing the head base 16 of the nozzle 21, the charging electrode 23, and the deflection electrode 24, and serves as an air supply path to the air nozzle outlet holes that blow air to each of them.

[0047] The head drying air nozzle 72 is formed with an air nozzle seal portion 72E with reduced surface roughness, and this air nozzle seal portion 72E is attached to a cleaning lid air nozzle attachment portion 77G formed on the cleaning lid block 77 together with an air seal member 81 to prevent air leakage. Here, the air nozzle flow path portion 72A formed on the head drying air nozzle 72 is adapted to be connected to a cleaning lid air flow path 77H formed on the cleaning lid block 77.

[0048] The head cleaning unit 4 is provided with a head cleaning tank 73 below the cleaning lid block 77 for housing the print head 2 during head cleaning. The head cleaning tank 73 has a cleaning tank side wall 73A formed to prevent the solvent 69B sprayed from the head cleaning nozzle 71 from scattering around, and a cleaning tank upper end 73F formed on the upper part of the cleaning tank side wall 73A. The cleaning tank upper end 73F is fitted into a cleaning lid mounting groove 77A formed in the lower part of the cleaning lid block 77 to fix and seal the head cleaning tank 73 and the cleaning lid block 77.

[0049] Furthermore, the head cleaning tank 73 is formed with a cleaning tank liquid outlet tube portion 73C inside for discharging the solvent 69B ejected from the head cleaning nozzle 71 to the outside of the head cleaning tank 73, and a cleaning tank conical inner bottom portion 73B which is formed at an angle so that the cleaning tank liquid outlet tube portion 73C is at its lowest position to make it easier for the solvent 69B to collect in the cleaning tank liquid outlet tube portion 73C.

[0050] The cleaning lid block 77 also forms a cleaning lid liquid joint attachment part 77D connected to the cleaning lid liquid flow path 77C, and the cleaning lid liquid joint attachment part 77D is connected to a liquid joint 78. Furthermore, a tube (for cleaning) 874A made of a fluorine-based solvent-resistant material is connected to the liquid joint 78 by a method such as press-fitting, and the tube (for cleaning) 874A is fitted with a final filter (for head cleaning) 74 for removing foreign matter mixed in the solvent 69A supplied to the head cleaning nozzle 71. The final filter (for head cleaning) 74 is connected to a tube (for cleaning) 873A made of a fluorine-based solvent-resistant material, and the tube (for cleaning) 873A passes through the inside of a conduit (for head cleaning unit) 6 and is connected to a filter (for head cleaning) 44 arranged in the inkjet recording device main body 1.

[0051] The cleaning lid block 77 also forms a cleaning lid air joint attachment portion 77J connected to the cleaning lid air flow path 77H, and an air joint 79 is connected to the cleaning lid air joint attachment portion 77J. Furthermore, a tube (for air supply) 883A made of a fluorine-based solvent-resistant material is connected to the air joint 79 by a method such as press fitting. The tube (for air supply) 883A passes through the inside of the conduit (for the head cleaning unit) 6 and is connected to an electromagnetic valve (for dry air supply) 55 arranged in the inkjet recording apparatus main body 1.

[0052] The head cleaning unit 4 is provided with a cleaning tank cover 85 so that the tubes (for cleaning) 873A and 874A and the tube (for air supply) 883A are not exposed to the outside of the head cleaning unit 4. The cleaning tank cover 85 is fixed to a cleaning lid outer upper part 77K formed on the top of the cleaning lid block 77 and to a cleaning tank outer lower part 73G formed at the bottom of the head cleaning tank. The conduit (for head cleaning unit) 6 is attached to the bottom of the cleaning tank cover 85 using a conduit fixing nut 86 so as not to protrude outside and interfere with other production equipment.

[0053] The head cleaning tank 73 also includes a cleaning tank bottle attachment part 73E formed cylindrically at the bottom, and a cleaning tank liquid outlet tube part 73C formed inside the cleaning tank bottle attachment part 73E and connected to the inside of the head cleaning tank 73. A cleaning tank liquid outlet oblique end part 73D is formed at the bottom end of the cleaning tank liquid outlet tube part 73C so that the solvent 69B dripping downward tends to concentrate in one place.

[0054] A removable cleaning liquid bottle 61 can be set at the bottom of the head cleaning unit 4. The cleaning liquid bottle 61 includes a bottled liquid storage section 61A for storing therein the cleaning liquid 69C used in the head cleaning process, a bottle mounting section 61B for fitting with and fixing to the cleaning tank bottle mounting section 73E of the head cleaning tank 73, and a bottled liquid inlet section 61C formed so as to surround the cleaning tank liquid outlet tube section 73C from the outside.

[0055] Next, the configuration of the inkjet recording device 600 in this embodiment with the print head 2 set in the head cleaning unit 4 will be described. In Figs. 7 and 8, the print head 2 is set in the head cleaning unit 4 with the head cover 17 removed. The print head 2 is in a state where the nozzle 21, the charging electrode 23, the deflection electrode 24, and the gutter 25 are pushed into the head cleaning tank 73 to a position where they are inside the head cleaning tank 73. The head cleaning unit 4 is arranged in a position where the surface of the print head guide 84 and the surface of the head base 16 are parallel and close to each other to a degree that does not hinder the sliding in the up and down direction so that the position of the print head 2 does not shift, and the head cleaning unit 4 has the print head fixing part 67 arranged so as to fit into the position where the head cover 17 of the print head 2 was originally attached, and the protective cover 18 of the print head 2 and the fixing knob fitting part 67A formed on the print head fixing part 67 are fixed with the fixing knob 19, so that the print head 2 can be stably set in the head cleaning unit 4.

[0056] Next, the operation of the inkjet recording device 600 in this embodiment when the print head 2 is set in the head cleaning unit 4 and a head cleaning process is being performed will be described with reference to Figs. 9 to 11. Fig. 9 is a diagram showing the path configuration of the inkjet recording device 600 in this embodiment when the print head 2 is set in the head cleaning unit 4. In Fig. 9, the flows of the solvents 69A, 69B, and cleaning liquid 69C when the head cleaning and the nozzle and gutter path cleaning of this embodiment are being performed are shown by thick lines. Fig. 10 is a cross-sectional view of the head cleaning unit 4 showing the flow of liquid inside the head cleaning unit 4 when the head cleaning process of this embodiment is being performed, and Fig. 11 is an enlarged view of the print head 2, the head cleaning nozzle 71, and the configuration in the vicinity thereof when the head cleaning process of this embodiment is being performed.

[0057] 9 to 11, the inkjet recording device 600 performs cleaning of the print head 2 by ejecting the solvent 69B from the head cleaning nozzle 71 in the head cleaning process. In a state in which the solvent 69B is being ejected from the head cleaning nozzle 71 in the head cleaning process, the pump (for solvent) 36 is operated and the solenoid valve (for head cleaning) 54 is energized to open the flow path, so that the solvent 69A stored in the solvent container 32 is supplied to the head cleaning nozzle 71 as shown by the supply flow direction of the solvent 69A indicated by the arrow A. Here, foreign matter that is initially mixed into the solvent 69A stored in the solvent container 32 is removed by the filter (for head cleaning) 42. Furthermore, foreign matter that is initially mixed between the filter (for head cleaning) 42 and the final filter (for head cleaning) 74 is removed by the final filter (for head cleaning) 74, thereby preventing the foreign matter from flowing into the head cleaning nozzle 71 together with the solvent 69A. Here, the replacement cycle of the filter (for head cleaning) 42 is set shorter than the replacement cycle of the final filter (for head cleaning) 74, and the installation position of the filter (for head cleaning) 42 is arranged in a location that is easier to replace than the installation position of the final filter (for head cleaning) 74.

[0058] The solvent 69A supplied to the head cleaning nozzle 71 is sprayed as the solvent 69B in the direction indicated by the arrow B (the direction in which the solvent 69B is sprayed from the liquid nozzle spray hole A part 71B toward the nozzle 21) and the arrow C (the direction in which the solvent 69B is sprayed from the liquid nozzle spray hole B part 71C toward the deflection electrode 24) to spray the solvent 69B onto the components such as the nozzle 21, the charging electrode 23, and the deflection electrode 24 assembled to the print head 2, thereby cleaning stains due to the ink 59A that adhered during operation or maintenance of the inkjet recording device 600. The solvent 69B sprayed onto the assembled components such as the nozzle 21, the charging electrode 23, and the deflection electrode 24 drips and flows by gravity in the directions indicated by the arrows D and E, and when the print head 2 is set in the head cleaning unit 4, the gutter 25 arranged below the deflection electrode 24 can be cleaned by the solvent 69B.

[0059] In addition, during the head cleaning process, the solvent 69B, which has been used to clean components such as the nozzle 21, charging electrode 23, deflection electrode 24, and gutter 25 arranged on the print head 2, drips down in the directions indicated by arrows F, G, and H, and flows into a cleaning liquid bottle 61 installed at the bottom of the head cleaning unit 4, and is collected at the bottom as cleaning liquid 69C.

[0060] Furthermore, when the head cleaning process of the inkjet recording device 600 is being performed, the pump (for circulation) 35 is operated to energize the solenoid valve (for circulation) 51 to open the flow path, so that, as shown by the suction flow direction of the solvent 69B indicated by the arrow J, a part of the solvent 69B sprayed from the head cleaning nozzle 71 in the direction of the arrow B is sucked through the nozzle discharge port 21A formed in the nozzle 21 and collected in the main ink container 31. In this way, in the head cleaning process, the inside of the nozzle 21 and the paths (for circulation) 831 to 833 can also be cleaned with the solvent 69B.

[0061] Furthermore, when the head cleaning process of the inkjet recording device 600 is being performed, the pump (for recovery) 34 is operated to energize the solenoid valve (for recovery) 50 and open the flow path, so that, as shown by the suction flow direction of the solvent 69B indicated by the arrow K, a portion of the solvent 69B that has been ejected from the head cleaning nozzle 71 and dripped in the directions of the arrows D and E is sucked through the gutter outlet 25A formed in the gutter 25 and collected in the main ink container 31. In this way, in the head cleaning process, the inside of the gutter 25 and the paths (for ink recovery) 811-814 can also be cleaned with the solvent 69B.

[0062] Next, the head drying process in this embodiment will be described. Fig. 12 is an enlarged view of the print head, drying nozzle, and the surrounding area when the head drying process in this embodiment is being performed.

[0063] 12, the inkjet recording device 600 performs a head drying process to dry the print head 2 by ejecting air from the head drying air nozzle 72. When air is being ejected from the head drying air nozzle 72 during the head drying process, the pump (for supplying dry air) 37 is operated and the solenoid valve (for supplying dry air) 55 is energized to open the flow path, so that air is ejected from the head drying air nozzle 72 in the directions of arrow M (the direction in which air is ejected from the air nozzle ejection hole A part 72B toward the gap between the charging electrodes 23) and arrow N (the direction in which air is ejected from the air nozzle ejection hole B part 72C toward the deflection electrode 24), thereby shortening the drying time of the print head 2 wetted with the solvent 69B during the head cleaning process.

[0064] 13 is a diagram showing a state in which the cleaning liquid bottle 61 has been removed from the head cleaning unit 4 of this embodiment. The cleaning liquid bottle 61 is fixed to the head cleaning unit 4 by engaging a female screw portion formed on the cleaning tank bottle mounting portion 73E of the head cleaning unit 4 with a male screw portion formed on the bottle mounting portion 61B of the cleaning liquid bottle 61. Therefore, the cleaning liquid bottle 61 can be removed from the head cleaning unit 4 by rotating the cleaning liquid bottle 61. The cleaning liquid 69C that has accumulated in the cleaning liquid bottle 61 after the head cleaning process can be discharged from the bottle liquid inlet portion 61C by tilting the cleaning liquid bottle 61.

[0065] Next, the flow of operations in the head cleaning process of the inkjet recording apparatus 600 in this embodiment will be described with reference to Fig. 14. Fig. 14 is a flow chart of the head cleaning operation in this embodiment.

[0066] In FIG. 14, first, in step S901, the ink jet recording device 600 has stopped ejecting ink from the nozzles 21 of the print head 2, and no power is supplied to ink circulation system components such as the pump (for supply) 33 and the solenoid valve (for supply) 49, indicating that they are not operating.

[0067] In step S902, the print head 2 installed on the production equipment is removed from the print head fixing metal fittings 13, the head cover 17 is removed from the print head 2, and the print head 2 is set in the head cleaning unit 4.

[0068] In step S903, the start button 63 provided on the head cleaning unit 4 is pressed, or a start button for performing the head cleaning process displayed on the operation display unit 8, which is a touch panel type, is pressed.

[0069] In step S904, a message such as "Please confirm that the cleaning fluid bottle 61 is attached to the head cleaning unit 4" is displayed on the display unit 65 provided on the head cleaning unit 4 or on the operation display unit 8.

[0070] In step S905, the operator checks the message displayed in step S904. If the check shows that the cleaning liquid bottle 61 is correctly attached to the head cleaning unit 4, the answer is determined to be "YES," and the operator presses the start button 63 provided on the head cleaning unit 4 or the "Execute" button displayed on the touch panel operation display unit 8, and the process proceeds to step S911. If the check shows that the cleaning liquid bottle 61 is not attached to the head cleaning unit 4, the answer is determined to be "NO," and the process proceeds to step S906.

[0071] In step S906, after attaching the cleaning liquid bottle 61, the operator presses the start button 63 provided on the head cleaning unit 4 or the "Execute" button displayed on the touch panel type operation display unit 8, and proceeds to step S911.

[0072] In step S911, the display section 65 provided in the head cleaning unit 4 or the operation display section 8 displays a message indicating that the head cleaning process has started, stating that "head cleaning process is in progress."

[0073] Step S912 is a head cleaning step, in which the solvent 69B is sprayed from the head cleaning nozzle 71 of the head cleaning unit 4 to clean the print head 2.

[0074] Step S913 is a head drying step, in which air is sprayed from the head drying air nozzle 72 of the head cleaning unit 4 to dry the print head 2. This drying time is controlled to be an appropriate drying time based on the type of ink 59A, the type of solvent 69A, or the temperature conditions around the print head 2 detected by the temperature sensor 27. For example, the drying time, i.e., the air supply time, is made longer under usage conditions in which the temperature detected by the temperature sensor 27 is low than under usage conditions in which the temperature detected by the temperature sensor 27 is high. This is because drying is more difficult at low temperatures.

[0075] Then, in step S921, the head cleaning process ends, and in step S922, the worker removes the print head 2 from the head cleaning unit 4 and attaches it to the print head fixing bracket 13 on the production equipment.

[0076] Step S931 indicates that the operator presses the "start operation" button on the touch panel type operation display unit 8.

[0077] Step S932 indicates that ink is being ejected from the nozzles 21 of the print head 2, and the inkjet recording apparatus 600 is ready to start printing.

[0078] Next, the flow of operations in the batch head cleaning process of the inkjet recording apparatus 600 in this embodiment will be described with reference to Fig. 15. Fig. 15 is a flow chart of the batch head cleaning process in this embodiment. The batch head cleaning process starts with ink 59A being ejected from the nozzles 21 of the print head 2, and stops the ejection of ink from the nozzles 21 of the print head 2. Then, solvent 69A is supplied to the nozzles 21 via the switching valve 26 to clean them, and then the solvent is ejected from the head cleaning nozzles 71 of the head cleaning unit 4 toward the print head 2 to clean it.

[0079] First, in FIG. 15, step S951 is a state in which ink 59A is ejected from nozzles 21 of a print head 2 installed on a production facility.

[0080] In step S952, the print head 2 installed on the production equipment is removed from the print head fixing metal fittings 13, the head cover 17 is removed from the print head 2, and the print head 2 is set in the head cleaning unit 4.

[0081] In step S953, the start button 63 provided on the head cleaning unit 4 is pressed, or a start button for performing the collective head cleaning process displayed on the operation display unit 8, which is a touch panel type, is pressed.

[0082] In step S954, a message such as "Please confirm that the cleaning fluid bottle 61 is attached to the head cleaning unit 4" is displayed on the display unit 65 provided on the head cleaning unit 4 or on the operation display unit 8.

[0083] In step S955, the operator checks the message displayed in step S954. If the check shows that the cleaning liquid bottle 61 is correctly attached to the head cleaning unit 4, the answer is determined to be "YES," and the operator presses the start button 63 provided on the head cleaning unit 4 or the "Execute" button displayed on the touch panel operation display unit 8, and the process proceeds to step S961. If the check shows that the cleaning liquid bottle 61 is not attached to the head cleaning unit 4, the answer is determined to be "NO," and the process proceeds to step S956.

[0084] In step S956, after attaching the cleaning liquid bottle 61, the operator presses the start button 63 provided on the head cleaning unit 4 or the "Execute" button displayed on the touch panel type operation display unit 8, and proceeds to step S961.

[0085] In step S961, the batch head cleaning process is started. First, in step S962, an ink ejection stop step is performed to stop ejection of ink 59A from nozzle 21 of print head 2. Next, in step S963, a nozzle cleaning step is performed to supply solvent 69A to nozzle 21 of print head 2 via switching valve 26 to clean nozzle 21 from the inside. Then, in step S964, a head cleaning step is performed to eject solvent 69B from head cleaning nozzle 71 of head cleaning unit 4 to clean print head 2. In step S965, a head drying step is performed to dry print head 2 by ejecting air from head drying air nozzle 72 of head cleaning unit 4. This drying time is controlled to be an appropriate drying time based on the type of ink 59A, the type of solvent 69A, or the temperature conditions around print head 2 detected by temperature sensor 27. Then, in step S971, the batch head cleaning process is terminated.

[0086] In step S972, the worker removes the print head 2 from the head cleaning unit 4, and attaches it to the print head fixing bracket 13 on the production equipment.

[0087] In step S973, the inkjet recording device 600 indicates that ink ejection from the nozzles 21 of the print head 2 has stopped, and that no power is being supplied to ink circulation system components such as the pump (for supply) 33 and the solenoid valve (for supply) 49, and that these components are not operating.

[0088] As described above, according to this embodiment, the inkjet recording device 600 can perform a series of steps from head cleaning to head drying by setting the print head 2 in the head cleaning unit 4. Furthermore, the inkjet recording device 600 shortens the moving distance of the print head 2 during the head cleaning operation by installing the head cleaning unit 4 on the belt conveyor 11 of the production line, and improves the stability of the head cleaning operation by setting the print head 2 in the head cleaning unit 4. Furthermore, the inkjet recording device 600 can be equipped with a head cleaning function that can also clean the inside of the nozzle 21 by sucking the solvent 69A from the nozzle 21 during head cleaning. EXAMPLES

[0089] The usage state of the inkjet recording apparatus 610 in this embodiment will be described with reference to Figures 16 and 17. Note that a description of the parts common to the first embodiment will be omitted, and the following mainly describes the parts different from the first embodiment.

[0090] FIG. 16 is a perspective view showing the inkjet recording apparatus 610 in this embodiment in use, and FIG. 17 is a perspective view showing the inkjet recording apparatus 610 in this embodiment with the print head 2 attached to the head cleaning unit 4.

[0091] 16, an inkjet recording device 610 includes an inkjet recording device main body 201, a print head 2 connected to the inkjet recording device main body 201 by a conduit (for print head) 5, and a head cleaning unit 4 connected to the inkjet recording device main body 201 by a conduit (for head cleaning unit) 6. The inkjet recording device main body 201 includes an operation display unit 208 for switching print settings and displaying confirmation messages and alarms, and a head cleaning unit fixing jig (for main body) 91A for fixing the head cleaning unit 4 to the inkjet recording device main body 201. The head cleaning unit 4 is installed in the inkjet recording device main body 201 via the head cleaning unit fixing jig (for main body) 91A.

[0092] 17 shows the state in which the print head 2 is set in the head cleaning unit 4 in an inkjet recording device 610. By installing the head cleaning unit 4 in the inkjet recording device main body 201, it is possible to arrange it in a way that makes it easy to perform the head cleaning operation using the operation display unit 208. Furthermore, because the head cleaning unit 4 can be installed in the inkjet recording device main body 201, it is possible to use the head cleaning unit 4 even if there is no space to install it on a production line such as the belt conveyor 11.

[0093] As described above, according to this embodiment, the inkjet recording device 610 is able to provide an inkjet recording device 610 with improved ease of handling and installation of the head cleaning unit 4 by making it possible to install the head cleaning unit 4 in the inkjet recording device main body 201. EXAMPLES

[0094] The usage state of the inkjet recording apparatus 620 in this embodiment will be described with reference to Fig. 18. Note that a description of the parts common to the first and second embodiments will be omitted, and the following mainly describes the parts different from the first and second embodiments.

[0095] FIG. 18 is a diagram showing a state in which the print head 502 of a different inkjet recording device 700 is set in the head cleaning unit 4 in the inkjet recording device 620 of this embodiment and head cleaning is being performed.

[0096] 18, in inkjet recording device 620, head cleaning unit 4 is installed in inkjet recording device main body 201 via head cleaning unit fixing jig (for main body) 91A. Then, inkjet recording device 700 is installed around inkjet recording device 620. Inkjet recording device 700 comprises inkjet recording device main body 501, print head 502 connected to inkjet recording device main body 501 by conduit (for print head) 505, and operation display unit 508 for switching print settings, displaying confirmation messages and alarms, etc.

[0097] The print head 502 of the inkjet recording device 700 is set in the head cleaning unit 4 of the inkjet recording device 620. With the head cover 517 removed, the print head 502 is inserted tip-first into the print head insertion section 62 of the head cleaning unit 4. The print head 502 is fixed and attached to the head cleaning unit 4 by fitting a print head fixing section 67 into a fixing knob 519. In this state, head cleaning can be controlled by operating the operation display section 208 of the inkjet recording device 620 or by pressing the start button 63 of the head cleaning unit 4.

[0098] As described above, according to this embodiment, the inkjet recording device 620 can be set with the print head 502 of a different inkjet recording device 700 and head cleaning can be performed, thereby providing an inkjet recording device with improved usability.

[0099] Although the embodiments have been described above, the present invention is not limited to the above-mentioned embodiments 1 to 3, and includes various modified examples. Moreover, the above-mentioned embodiments 1 to 3 have been described in detail to explain the present invention in an easily understandable manner, and the present invention is not necessarily limited to those having all of the configurations described. [Explanation of symbols]

[0100] 1, 201, 501: Inkjet recording device main body, 2: Print head, 3: Separation panel, 4: Head cleaning unit, 5: Conduit (for print head), 6: Conduit (for head cleaning unit), 7: Cable (for separation panel), 8: Operation display unit, 9: Control unit, 16: Head base, 17: Head cover, 17A: Printing opening, 18: Protective cover, 19: Fixing knob, 20: Partition member, 21: Nozzle, 21A: Nozzle outlet, 22: Electrostrictive element (not shown), 23: Charged electrode, 24: Deflection electrode, 25: Gutter, 25A: Gutter outlet, 31: Main ink container, 32: Solvent container, 59A: Ink, 61: Cleaning liquid bottle, 61A: Bottle liquid storage unit, 61B: Bottle mounting unit, 61C: Bottle Liquid inlet, 62: print head insertion section, 63: start button, 64: stop button, 65: display, 67: print head fixing section, 67A: fixing knob fitting section, 69A, 69B: solvent, 69C: cleaning liquid, 71: head cleaning nozzle, 72: head drying air nozzle, 73: head cleaning tank, 74: final filter (for head cleaning), 75: nozzle fixing plate, 77: cleaning lid block, 78: liquid joint, 79: air joint, 80: liquid seal member, 81: air seal member, 82: lid hinge, 83: lid member, 83A: lid member protrusion, 84: print head guide, 85: cleaning tank cover, 208, 508: operation display section, 502: print head, 600, 610, 620, 700: inkjet recording device

Claims

1. An inkjet recording device having a main body and a print head, The main body has an ink container that contains ink for printing on a print target, the print head unit has a nozzle connected to the ink container and ejecting pressurized ink, a charging electrode for charging ink droplets ejected from the nozzle, a deflection electrode for deflecting the ink droplets charged by the charging electrode, and a gutter for collecting ink not used for printing; The inkjet recording device further includes a head mounting unit that is configured to be mountable to the print head unit and is connected to the main body unit, Furthermore, the inkjet recording device is provided with an operation display unit that instructs the operation of the main body unit and the print head unit, the operation display unit is configured to be detachable at a position higher than the floor surface, and the operation display unit is connected to the main body unit by a cable so that it can be operated at a position away from the main body unit.

2. 2. The inkjet recording apparatus according to claim 1, The inkjet recording apparatus is characterized in that a recovery container for recovering waste liquid used to clean the print head portion can be attached to a lower portion of the head mounting unit.

3. 3. The inkjet recording apparatus according to claim 1, the main body portion includes a solvent supply portion that supplies a solvent to the print head portion, an ink jet recording apparatus, characterized in that the print head portion is cleaned with the solvent supplied from the solvent supply portion.

4. 3. The inkjet recording apparatus according to claim 1, the main body portion includes a solvent supply portion that supplies a solvent to the print head portion, an ink jet recording apparatus comprising: a nozzle for ejecting a solvent from said nozzle to said ink passage of said print head; and a nozzle for ejecting said solvent from said nozzle to eject said solvent from said ink passage of said print head.

5. A recording device comprising a main body, a print head, and a head mounting unit for mounting the print head, The main body has an ink container that contains ink for printing on a print target, the print head unit has a nozzle connected to the ink container and ejecting pressurized ink, a charging electrode for charging ink droplets ejected from the nozzle, a deflection electrode for deflecting the ink droplets charged by the charging electrode, and a gutter for collecting ink not used for printing; the head mounting unit includes a print head insertion section into which the print head is mounted, and a recovery container section for recovering cleaning fluid used to clean the print head, The recording device is equipped with an operation display unit that instructs the operation of the main body unit and the print head unit, the operation display unit is configured to be detachable at a position higher than the floor surface, and the operation display unit is connected to the main body unit by a cable so that it can be operated from a position away from the main body unit.

6. 6. The recording apparatus according to claim 5, The recording apparatus, wherein the collection container portion is detachable from the head mounting unit.

7. 7. The recording apparatus according to claim 5, the main body portion includes a solvent supply portion that supplies a solvent to the print head portion, A recording apparatus comprising: a print head unit that is cleaned with the solvent supplied from the solvent supply unit.

8. 7. The recording apparatus according to claim 5, the main body portion includes a solvent supply portion that supplies a solvent to the print head portion, a nozzle of the print head unit that is in contact with the ink passage of the print head unit and a nozzle of the print head unit that is in contact with the ink passage of the print head unit;

Images