JP2006021435A - Image recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cure UV-curing ink sufficiently while realizing high speed image recording in an image recorder. <P>SOLUTION: The image recorder comprises a section 5 for recording an image with UV-curing ink on a recording medium 2 of three-dimensional profile being carried by a carrying section 3, a section 7 for irradiating that image with UV-rays, a section 4 for measuring the irradiation distance between the surface of the recording medium 2 being carried by the carrying section 3 and the UV-ray irradiating section 7, and a section 8 for moving the UV-ray irradiating section 7 reciprocatingly to approach the carrying section 3 and to recede therefrom wherein the section 8 moves the UV-ray irradiating section 7 to sustain a constant irradiation distance measured by the distance measuring section 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image recording apparatus that records an image on a recording medium having a three-dimensional shape.

  As an image recording apparatus, an inkjet recording apparatus or the like has been proposed. The inkjet recording apparatus includes an inkjet head that selectively ejects ink droplets from a plurality of nozzles to a recording medium, and is an apparatus that records an image on the recording medium using the inkjet head.

  As inks to be used, there are water-based, oil-based, solvent-based, and ultraviolet curable inks. For office use, water-based ink is mainly used, and for industrial use, solvent-based ink and ultraviolet curable ink are mainly used. In the solvent-based ink, the image is fixed by evaporating and drying the ink after image recording. On the other hand, in the case of ultraviolet curable ink, the image is fixed by solidifying the ink after image recording by irradiation of ultraviolet rays. Recently, due to increasing environmental awareness, reduction of volatile organic solvents (VOC) has been demanded, and conversion from solvent-based inks to ultraviolet curable inks has been promoted.

  When using an ultraviolet curable ink, an ultraviolet irradiation device for curing the ink is required. The ultraviolet irradiation device is an ultraviolet irradiation lamp that irradiates ultraviolet rays, a reflecting mirror that reflects and collects the irradiation light of the ultraviolet irradiation lamp on the ultraviolet curable ink on the recording medium, and a heat ray absorbing glass that absorbs heat from the ultraviolet irradiation lamp. Etc. The reflection mirror is designed to irradiate the recording medium with reflected ultraviolet light in addition to the ultraviolet light directly irradiated onto the recording medium from the ultraviolet irradiation lamp in order to efficiently cure the ultraviolet curable ink. . Since the curing of the ultraviolet curable ink is affected by the irradiation intensity of ultraviolet rays, the irradiation time, and the like, the necessary irradiation intensity is determined according to the conveyance speed of the recording medium.

  On the other hand, an ink jet recording apparatus that cures a recording liquid such as ink using an electron beam has been proposed (see Patent Document 1). In this ink jet recording apparatus, an electron beam irradiation apparatus is moved in three dimensions to irradiate an electron beam onto a recording medium that is an object to be irradiated. Accordingly, the recording medium can be irradiated with an electron beam at an arbitrary timing. For example, the surface treatment of the recording medium can be performed before the ink is cured. The electron beam irradiation apparatus is an apparatus that irradiates a recording medium with an electron beam by generating electrons in a high vacuum, accelerating the electrons with a high voltage, and emitting the accelerated electrons into the air. The electron beam refers to a bundle of electrons, and is a kind of particle beam together with a proton beam and a neutron beam. Since such an electron beam is highly transmissive, it passes through the ink and reaches the recording medium, so that the surface of the recording medium is modified (surface treatment).

JP 2003-334936 A

  However, when an ultraviolet irradiating device is used to cure the ultraviolet curable ink on a recording medium having a three-dimensional shape, the irradiation distance between the surface of the recording medium and the ultraviolet irradiating device is Due to the undulation, the focal point of the ultraviolet rays irradiated from the ultraviolet irradiation device is shifted from the surface of the recording medium, so that the irradiation intensity on the surface of the recording medium is greatly reduced. For this reason, the curing of the ultraviolet curable ink becomes insufficient, and the scratch resistance and adhesion of the recorded image is lowered, or the ultraviolet curable ink is uncured. Even if the irradiation intensity is reduced, if the conveyance speed of the recording medium is extremely slow, it is possible to cure the ultraviolet curable ink, but satisfying the high conveyance speed required for industrial applications, That is, high-speed image recording cannot be realized, and furthermore, heat due to ultraviolet irradiation may adversely affect the recording medium.

  In the ink jet recording apparatus of Patent Document 1, the electron beam irradiation device is moved in three dimensions to irradiate the recording medium with the electron beam. This is because the irradiation object is irradiated with the electron beam at an arbitrary timing. In addition, this is because the surface treatment of the recording medium is optimally performed.

  An object of the present invention is to sufficiently cure an ultraviolet curable ink while realizing high-speed image recording in an image recording apparatus.

  The present invention provides a conveyance unit that conveys a recording medium having a three-dimensional shape, a recording unit that records an image with ultraviolet curable ink on the recording medium conveyed by the conveyance unit, and the recording unit that records the image on the recording medium. An ultraviolet irradiation unit that irradiates the recorded image with ultraviolet rays, a first measurement unit that measures an irradiation distance between the surface of the recording medium conveyed by the conveyance unit and the ultraviolet irradiation unit, and A first moving unit that performs a moving operation for reciprocally moving the transport unit and the ultraviolet irradiation unit in a reciprocating manner relative to each other, and the irradiation distance measured by the first measuring unit is kept constant. Execution means for causing the first moving unit to execute the moving operation.

  According to the present invention, since the irradiation distance between the surface of the three-dimensional recording medium and the ultraviolet irradiation unit is kept constant, the irradiation intensity on the surface of the recording medium can be kept constant. In addition, the focal point of the ultraviolet ray irradiated from the ultraviolet irradiation unit can be held on the surface of the recording medium. As a result, the ultraviolet curable ink is sufficiently cured without lowering the conveyance speed, so that the ultraviolet curable ink can be sufficiently cured while realizing high-speed image recording.

  The best mode for carrying out the present invention will be described with reference to the drawings. In the present embodiment, an ink jet recording apparatus will be described as an example of an image recording apparatus.

  FIG. 1 is a schematic diagram schematically showing an ink jet recording apparatus according to the present embodiment.

  As shown in FIG. 1, the inkjet recording apparatus 1 includes a transport unit 3 that transports a recording medium 2 having a three-dimensional shape, and a distance measurement unit 4 that measures the distance to the surface of the recording medium 2 transported by the transport unit 3. A recording unit 5 that performs an image recording operation on the recording medium 2 conveyed by the conveying unit 3, a recording moving unit 6 that reciprocally moves the recording unit 5 in the contact / separation direction with respect to the conveying unit 3, and a conveying unit 3 includes an ultraviolet irradiation unit 7 that irradiates the recording medium 2 conveyed by the ultraviolet rays 3 and an irradiation moving unit 8 that reciprocally moves the ultraviolet irradiation unit 7 in the contact / separation direction with respect to the conveyance unit 3. .

  The conveyance unit 3 is a drive roller 9 that is rotatably provided, a driven roller 10 that is rotatably provided, a conveyance belt 11 that is stretched over the rollers 9 and 10, and a drive that rotationally drives the drive roller 9. It consists of a motor 12 and the like. The drive motor 12 applies drive force to the drive roller 9 via a coupling mechanism (not shown) such as a gear. The driving roller 9 is rotated by a driving force from the driving motor 12, and the driven roller 10 and the conveyance belt 11 are also rotated by this rotating force. Such a transport unit 3 transports the recording medium 2 placed on the transport surface, which is the surface of the transport belt 11, in a predetermined transport direction by the rotation of the driving roller 9.

  The distance measuring unit 4 is fixedly provided at a predetermined position separated from the conveying surface of the conveying belt 11 by a predetermined distance. The distance measuring unit 4 is a distance sensor that measures the distance from the fixed position to the surface of the recording medium 2 that is a measurement object. Such a distance measuring unit 4 measures the distance from the fixed position to the surface of the recording medium 2 at regular intervals. From the distance data measured by the distance measuring unit 4 in this way, the recording distance between the surface of the recording medium 2 and the recording unit 5 and the irradiation distance between the surface of the recording medium 2 and the ultraviolet irradiation unit 7 are obtained. It is done. Therefore, the distance measuring unit 4 functions as a first measuring unit and a second measuring unit.

  The recording unit 5 is provided at a predetermined position facing the conveyance surface of the conveyance belt 11 and separated by a predetermined distance so as to be movable in the contact / separation direction with respect to the conveyance belt 11. As the recording unit 5, an inkjet head 14 that selectively ejects ink droplets from a plurality of nozzles 13 is used. The inkjet head 14 is connected to an ink tank (not shown) that stores ink. As the ink, ultraviolet curable ink (UV ink) is used. Specifically, the ultraviolet curable ink includes a pigment, a monomer, an oligomer, a photopolymerization initiator, a dispersant, and other additives (for example, a surface tension adjusting agent). Since the ultraviolet curable ink is an ink having very low volatility, it is possible to suppress the occurrence frequency of clogging of the nozzles 13 due to evaporation and drying of the ink.

  Here, only one inkjet head 14 is used, but the present invention is not limited to this. For example, a plurality of inkjet heads 14 may be used in correspondence with color printing or the like. In addition, the inkjet head 14 has a length capable of being discharged over the entire width of the recording medium 2 and is configured not to move in the width direction. The width may be shortened, and the image recording operation may be performed by moving the recording medium 2 in the width direction (serial recording method). In addition, although the inkjet head 14 is used as the recording part 5, it is not restricted to this.

  The recording moving unit 6 is a support member (not shown) that supports the recording unit 5 so as to be movable in the contact / separation direction with respect to the transport belt 11, and guides and moves the recording unit 5 in the contact / separation direction with respect to the transport belt 11. A guide screw 15 and a drive motor 16 that rotationally drives the guide screw 15 are configured. As the drive motor 16, a stepping motor or the like is used. Such a recording moving unit 6 reciprocally moves the recording unit 5 in the contact / separation direction with respect to the transport belt 11. Therefore, the recording moving unit 6 functions as a second moving unit.

  The ultraviolet irradiation unit 7 is provided at a predetermined position facing the conveyance surface of the conveyance belt 11 and separated by a predetermined distance so as to be able to reciprocate in the contact and separation direction with respect to the conveyance belt 11. The ultraviolet irradiation unit 7 includes an ultraviolet irradiation lamp 17 that irradiates ultraviolet rays, a reflection mirror 18 that reflects and collects the irradiation light of the ultraviolet irradiation lamp 17 on an image recorded on the surface of the recording medium 2, and an ultraviolet irradiation lamp 17. And a power source (not shown) for driving the ultraviolet irradiation lamp 17 and the like. Further, the ultraviolet irradiation unit 7 includes an approach detection sensor 21 that detects the approach of the recording medium 2, a detachment detection sensor 22 that detects the detachment of the recording medium 2, and the like. Ultraviolet rays generally have a wavelength in the range of 100 to 400 nm, and are a kind of electromagnetic waves together with visible light, infrared rays, X-rays and γ rays.

  The reflection mirror 18 irradiates the surface of the recording medium 2 with reflected ultraviolet light in addition to the ultraviolet light directly irradiated onto the surface of the recording medium 2 from the ultraviolet irradiation lamp 17 in order to efficiently cure the ultraviolet curable ink. Designed to be Further, the proximity detection sensor 21 is provided upstream of the ultraviolet irradiation unit 7 in the conveyance direction of the recording medium 2, and the separation detection sensor 22 is disposed on the ultraviolet irradiation unit 7 in the conveyance direction of the recording medium 2. On the other hand, it is provided on the downstream side. As the approach detection sensor 21 and the separation detection sensor 22, for example, a reflection type sensor or a transmission type sensor is used.

  The irradiation moving unit 8 is a support member (not shown) that supports the ultraviolet irradiation unit 7 so as to be movable in the contact / separation direction with respect to the conveyance belt 11, and moves the ultraviolet irradiation unit 7 while guiding in the contact / separation direction with respect to the conveyance belt 11. For example, a drive motor 24 for rotating the guide screw 23, and the like. A stepping motor or the like is used as the drive motor 24. Such an irradiation moving unit 8 moves the ultraviolet irradiation unit 7 in a reciprocating manner in the contact / separation direction with respect to the conveyor belt 11. Therefore, the irradiation moving unit 8 functions as a first moving unit.

  FIG. 2 is a longitudinal side view schematically showing the internal configuration of the inkjet head 14.

  As shown in FIG. 2, the inkjet head 14 includes a common ink chamber 31 that stores supplied ink, a plurality of pressure chambers 32 that respectively communicate with the common ink chamber 31 and store ink, and one of these pressure chambers 32. And a nozzle plate 33 having the nozzle 13 communicating with the pressure chamber 32. Such an ink jet head 14 records an image on the recording medium 2 by causing the ink in the pressure chamber 32 to be ejected from the nozzle 13 as ink droplets due to the volume change of the pressure chamber 32.

  In the common ink chamber 31, an ink supply port 34 for supplying ink into the chamber is formed. The ink supply port 34 is connected to an ink tank or the like, and ink is supplied from the ink supply port 34 to the common ink chamber 31. The nozzle plate 33 is formed with a plurality of nozzles 13 penetrating in the plate thickness direction. The outer surface of the nozzle plate 33 functions as a nozzle surface. The nozzles are provided corresponding to the respective pressure chambers 32. The nozzle plate 33 is provided with an ink repellent layer (not shown) having ink repellent properties for preventing ink from adhering to the nozzle surface.

  In the present embodiment, the piezoelectric ink jet head 14 using a piezoelectric element (for example, a piezo element) is used. However, the present invention is not limited to this. For example, a thermal ink jet ink jet using a heating element is used. A head may be used.

  FIG. 3 is a block diagram schematically showing the electrical connection of each part provided in the inkjet recording apparatus 1.

  As shown in FIG. 3, the inkjet recording apparatus 1 includes a controller 50. The controller 50 includes a central processing unit (CPU) 51 that centrally controls each unit, a read only memory (ROM) 52 that stores various programs executed by the CPU 51, a random access memory (RAM) that functions as a work area for the CPU 51, and the like. ) 53 and a timer 54 and the like are connected by a bus line 55.

  The distance measurement unit 4 is connected to the CPU 51 via the distance measurement control unit 56, the recording unit 5 is connected via the recording control unit 57, and the ultraviolet irradiation unit 7 is connected via the irradiation control unit 58. The drive motors 12, 16, and 24 are connected via the drive motor control unit 59. Further, an external device (not shown) such as a personal computer is connected to the CPU 51 via a communication interface (not shown).

  FIG. 4 shows the illuminance distribution of the ultraviolet rays irradiated from the ultraviolet irradiation unit 7, and the focal position (00 mm), the irradiated position (10 mm) shifted by 10 mm from the focal position, and the irradiated position (20 mm shifted by 20 mm from the focal position). It is explanatory drawing which shows the illumination intensity distribution in each position of (). The irradiated position deviated by 10 mm from the focal position is a position moved 10 mm away from the focal position by 10 mm from the focal position, and the irradiated position deviated by 20 mm from the focal position is irradiated by ultraviolet rays from the focal position. The position is close to or far from the portion 7 by 20 mm.

As shown in FIG. 4, when the irradiated position deviates from the focal position by 10 mm or 20 mm, the irradiation intensity is greatly reduced (about 1600 mW / cm ² ) compared to the irradiation intensity at the focal position (about 2300 mW / cm ² ). ² or about 1400 mW / cm ² ). When the irradiation intensity is reduced in this manner, the ultraviolet curable ink is not sufficiently cured, and it is necessary to maintain the focal point of the ultraviolet rays on the surface of the recording medium 2. Therefore, the irradiation moving unit 8 moves the ultraviolet irradiation unit 7 so that the irradiation distance between the surface of the recording medium 2 and the ultraviolet irradiation unit 7 is kept constant. This makes it possible to keep the focal point of ultraviolet rays on the surface of the recording medium 2. On the other hand, the recording moving unit 6 also moves the recording unit 5 so as to keep the recording distance between the surface of the recording medium 2 and the recording unit 5 constant. Thereby, it is possible to record a highly accurate image on the recording medium 2. Note that the irradiation distance and the recording distance are held constant based on distance data measured by the distance measuring unit 4 and temporarily stored in the RAM 53 (for example, until the image recording operation is completed).

  An image recording operation of the inkjet recording apparatus 1 in such a configuration will be described. The ink jet recording apparatus 1 starts an image recording operation in response to an image recording start command from the controller 50, records an image on a recording medium based on the recording data received from the external apparatus, and cures the image. The image recording operation is terminated by an image recording end command from.

  The three-dimensional recording medium 2 is transported by the transport unit 3 and passes through the distance measuring unit 4. At this time, the distance between the surface of the recording medium 2 and the distance measuring unit 4 is measured by the distance measuring unit 4 at regular intervals, and the distance data is temporarily stored in the RAM 53. The recording medium 2 that has passed through the distance measuring unit 4 is further conveyed by the conveying unit 3 and passes through the recording unit 5. At this time, an image is recorded on the surface of the recording medium 2 by the recording unit 5. During this recording operation, the recording unit 5 uses the recording moving unit 6 to record the recording distance between the surface of the recording medium 2 and the recording unit 5 based on the undulation of the surface of the recording medium 2, that is, the distance data stored in the RAM 53. Is moved in the contact / separation direction with respect to the conveyor belt 11 so as to keep constant. At this time, based on the program stored in the ROM 52, the CPU 51 causes the recording moving unit 6 to perform a moving operation for moving the recording unit 5 so as to keep the recording distance constant (execution means).

  Thereafter, the recording medium 2 that has passed through the recording unit 5 is further transported by the transport unit 3 and passes through the ultraviolet irradiation unit 7. At this time, the surface of the recording medium 2, that is, the image is irradiated with ultraviolet rays by the ultraviolet irradiation unit 7. The irradiation of the ultraviolet rays is performed by opening the shutter 20 when the recording medium 2 passes the approach detection sensor 21 and closing the shutter 20 when the recording medium 2 passes the separation detection sensor 22. The ultraviolet irradiation lamp 17 is turned on by an image recording start command and turned off by an image recording end command. During the curing operation, the ultraviolet irradiation unit 7 causes the surface of the recording medium 2 between the surface of the recording medium 2 and the ultraviolet irradiation unit 7 by the irradiation moving unit 8 based on the undulation of the surface of the recording medium 2, that is, the distance data stored in the RAM 53. It moves in the contact / separation direction with respect to the conveyor belt 11 so as to keep the irradiation distance constant. At this time, based on the program stored in the ROM 52, the CPU 51 causes the irradiation moving unit 8 to perform a moving operation for moving the ultraviolet irradiation unit 7 so as to keep the irradiation distance constant (execution means).

  As described above, according to the present embodiment, since the irradiation distance between the surface of the three-dimensional recording medium 2 and the ultraviolet irradiation unit 7 is kept constant, the irradiation intensity on the surface of the recording medium 2 is constant. In addition, the focal point of the ultraviolet rays irradiated from the ultraviolet irradiation unit 7 can be held on the surface of the recording medium 2. As a result, the ultraviolet curable ink is sufficiently cured without reducing the conveyance speed of the recording medium 2 by the conveyance unit 3, so that the ultraviolet curable ink can be sufficiently cured while realizing high-speed image recording. . Furthermore, since the recording distance between the surface of the recording medium 2 and the recording unit 5 is also kept constant, an image can be recorded with high accuracy on the surface of the three-dimensional recording medium 2. Further, since there is no need to reduce the conveyance speed, the irradiation time does not become long, and it is possible to prevent the heat due to the ultraviolet irradiation from adversely affecting the recording medium 2.

  In the present embodiment, the recording unit 5 is moved by the recording moving unit 6 and the ultraviolet irradiation unit 7 is moved by the irradiation moving unit 8 so that the recording distance and the irradiation distance are kept constant. For example, the recording distance and the irradiation distance may be kept constant by moving the transport unit 3. That is, the transport unit 3 and the recording unit 5 need only be relatively reciprocated in their contact / separation directions, and the transport unit 3 and the ultraviolet irradiation unit 7 can be reciprocated relatively in their contact / separation directions. Move to.

  Further, in the present embodiment, the recording moving unit 6 is provided in the ink jet recording apparatus 1, but the present invention is not limited to this. For example, when the surface of the recording medium 2 is not large, or an image is recorded with high accuracy. If there is no need, the recording moving unit 6 may not be provided because the recording distance does not have to be kept constant. Thereby, the apparatus configuration can be simplified.

  In the present embodiment, the transport unit 3 and the recording unit 5 are transported by the transport unit 3 and the recording moving unit 6 which is a second moving unit that performs a moving operation for reciprocally moving the transport unit 3 and the recording unit 5 in a reciprocating direction. The distance measuring unit 4 as a second measuring unit for measuring the recording distance between the surface of the recording medium 2 to be recorded and the recording unit 5 and the execution means keep the recording distance measured by the distance measuring unit 4 constant. Since the recording moving unit 6 performs the moving operation as described above, the recording distance is kept constant, so that an image can be recorded on the surface of the three-dimensional recording medium 2 with high accuracy.

  In the present embodiment, the irradiation moving unit 8 and the recording moving unit 6 are individually provided. However, the present invention is not limited to this. For example, the irradiation moving unit 8 and the recording moving unit 6 may be shared. In this case, since the irradiation moving unit 8 and the recording moving unit 6 which are the first moving units are shared, the apparatus configuration can be simplified.

  In the present embodiment, since the first measurement unit and the second measurement unit are shared as the distance measurement unit 4, the apparatus configuration can be simplified.

  In the present embodiment, since the recording unit 5 includes the inkjet head 14, it is possible to record an image on the surface of the recording medium 2 with high accuracy using ultraviolet curable ink.

  In the present embodiment, only one inkjet head 14 is used. However, the present invention is not limited to this. For example, a plurality of inkjet heads may be used in correspondence with color printing or the like. In this case, the recording unit 5 includes a plurality of inkjet heads 14. At this time, the recording moving unit 6 can record an image on the surface of the recording medium 2 with high accuracy by independently moving the plurality of inkjet heads 14. Further, for example, the recording moving unit 6 can simplify the apparatus configuration by moving the plurality of inkjet heads 14 together. Such movement (independent or integral) of the plurality of inkjet heads 14 is selected and set depending on the required image accuracy.

1 is a schematic diagram schematically showing an ink jet recording apparatus according to an embodiment of the present invention. It is a vertical side view which shows roughly the internal structure of the inkjet head with which an inkjet recording device is provided. It is a block diagram which shows roughly the electrical connection of each part with which an inkjet recording device is provided. 2 shows the illuminance distribution of ultraviolet rays irradiated from an ultraviolet irradiation unit provided in the ink jet recording apparatus, the focal position (00 mm), the irradiated position (10 mm) shifted by 10 mm from the focal position, and the irradiated position (20 mm shifted by 20 mm from the focal position). It is explanatory drawing which shows the illumination intensity distribution in each position of ().

Explanation of symbols

1 Image recording device (inkjet recording device)
2 Recording medium 3 Conveying section 4 First measuring section (distance measuring section)
4 Second measurement unit (distance measurement unit)
5 Recording unit 6 Second moving unit (recording moving unit)
7 UV irradiation part 8 1st movement part (irradiation movement part)
14 Inkjet head

Claims (7)

A transport unit for transporting a recording medium having a three-dimensional shape;
A recording unit for recording an image with ultraviolet curable ink on the recording medium conveyed by the conveying unit;
An ultraviolet irradiation unit that irradiates the image recorded on the recording medium with ultraviolet rays by the recording unit;
A first measurement unit for measuring an irradiation distance between the surface of the recording medium conveyed by the conveyance unit and the ultraviolet irradiation unit;
A first moving unit that performs a moving operation for reciprocally moving the transport unit and the ultraviolet irradiation unit in a reciprocating manner in their contact and separation directions;
Execution means for causing the first moving unit to execute the moving operation so as to keep the irradiation distance measured by the first measuring unit constant;
An image recording apparatus comprising: A second moving unit for performing a moving operation for reciprocally moving the transport unit and the recording unit in a reciprocating manner in their contact and separation directions;
A second measuring unit for measuring a recording distance between the surface of the recording medium conveyed by the conveying unit and the recording unit;
The execution means causes the second moving unit to execute the moving operation so as to keep the recording distance measured by the second measuring unit constant.
The image recording apparatus according to claim 1. The first moving unit and the second moving unit are shared.
The image recording apparatus according to claim 2. The first measurement unit and the second measurement unit are shared.
The image recording apparatus according to claim 2 or 3. The recording unit includes an inkjet head;
The image recording apparatus according to claim 1. The recording unit includes a plurality of inkjet heads,
The second moving unit moves each of the plurality of inkjet heads independently;
The image recording apparatus according to claim 1. The recording unit includes a plurality of inkjet heads,
The second moving unit moves the plurality of inkjet heads integrally;
The image recording apparatus according to claim 1.

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