JP2011194677A - Image recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that when a perforation is formed so as to cross a recorded image, image quality is degraded because the substrate of a recording medium is exposed and the perforation is unpleasant to the eye.SOLUTION: In an image recorder, when ink is ejected to the recording medium, to record the image, the ejection amount of an ink droplet ejected to a scheduled perforation forming area where the image and the perforation are overlapped with each other is made larger than that of an area around the scheduled perforation forming area, to form an ink penetration part in a concave shape, so that the substrate of the recording medium is not exposed as much as possible when the perforation is formed.

Description

  The present invention relates to an image recording apparatus that reduces deterioration in image quality due to perforations on an image portion recorded on a recording medium.

  In general, a perforation forming apparatus that forms a perforation at a desired position on a long recording paper or recording film that is mounted on an image recording apparatus and wound in a roll shape is known. Such a perforation forming apparatus mainly includes a perforation blade for forming a perforation on a recording medium, an anvil roller disposed opposite to the perforation blade and arranged to receive the perforation blade across the recording medium. It consists of

  For example, Patent Document 1 proposes an ink jet printer that forms perforations with a rotary cutter after an image is formed on roll paper.

JP 2006-334938 A

  The perforation forming apparatus described above does not always form a perforation at a portion where an image is not recorded. Since the perforation is formed at a position where separation is required, there is a limit even if the formation position of the perforation is moved in accordance with the image. If the image covers the entire recording medium, it should be avoided. I can't do it.

  When a perforation crosses the recorded image, there is a problem that the image quality is deteriorated due to the presence of the perforation. This problem becomes conspicuous when an image in which the ink that has landed on the recording medium has a relatively shallow penetration, particularly when a high-density ink such as black ink is used. Hereinafter, the cause of this problem will be described.

  When the depth at which the perforation crawls the recording medium is deeper than the penetration depth of the ink into the recording medium 11, as shown in FIGS. 14A and 14B, the perforation of the depression (bottomed hole) 40 or the through hole 40H is formed. On the side surface, the base 11S of the recording medium 11 is exposed. Thereby, for example, even if the user inputs a uniform filled image, the background of the recording medium may be white on the image 10 actually recorded on the recording medium 11 as shown in FIG. 14C. For example, a continuous white broken line corresponding to the perforation 40 enters, and depending on how it is seen, it is recognized as a white streak. It will be.

  Even if the base is not completely exposed, the concentration of the bottom portion of the perforation 40 (or the side wall of the hole near the back surface) is relatively lowered. Accordingly, in the case of a recording medium with a base color of the recording medium, for example, a white recording medium, when light is illuminated from the back side of the recording medium, the light is transmitted from the perforation 40 portion to the front side, and white is also included in the image. You will see a streak. Unlike the cut surface at the edge of the recording medium, the perforation is generally formed in the middle of the recording medium so as to cross the image. That is, the image quality is lowered due to the perforation.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an ink jet recording apparatus that adjusts the amount of ink ejected from a perforation applied to an image portion recorded on a recording medium to reduce image quality deterioration due to the perforation. To do.

  In order to achieve the above object, an embodiment according to the present invention includes a recording head that ejects ink to a recording medium based on input image data, an ink amount control unit that controls an ink ejection amount of the recording head, and an input A perforation forming unit that forms a perforation on the recording medium on which an image is recorded based on the perforated data, wherein the ink amount control unit includes the image amount control unit. The amount of ink ejected by the recording head with respect to the region where the image recording portion that requires ink ejection in the data and the perforation data in the perforation data and the perforation forming portion including the perforation traveling direction overlap on the recording medium. An image recording apparatus is provided that increases the amount of ink ejected by the recording head for areas other than the overlapping region.

  According to the present invention, it is possible to provide an ink jet recording apparatus that adjusts the amount of ink landing on a perforation applied to an image portion recorded on a recording medium to reduce deterioration in image quality due to the perforation.

FIG. 1 is a diagram showing a schematic configuration example of the first embodiment according to the ink jet recording apparatus of the present invention. FIG. 2A is a schematic diagram illustrating a cross-sectional configuration of an ink chamber provided with a nozzle and an actuator. FIG. 2B is a schematic diagram illustrating a cross-sectional configuration in a state where the actuator is displaced so as to protrude into the ink chamber. FIG. 2C is a schematic diagram illustrating a cross-sectional configuration when an ink droplet is ejected from the ink chamber. FIG. 2D is a schematic diagram illustrating a cross-sectional configuration when ink droplets are continuously ejected from a nozzle. FIG. 2E is a diagram showing a state in which a plurality of ejected ink droplets are gathered into one in FIG. 2D. FIG. 2F is a schematic diagram showing a cross-sectional configuration showing a state in which the displacement of the actuator is larger than that in FIG. 2B. FIG. 2G is a schematic diagram illustrating a cross-sectional configuration when an ink droplet larger than the ink droplet illustrated in FIG. 2 is ejected. FIG. 3A is a diagram illustrating a driving voltage of one pulse applied to the recording head. FIG. 3B is a diagram illustrating a driving voltage of a plurality of pulses applied to the recording head. FIG. 3C is a diagram illustrating a one-pulse driving voltage having a voltage higher than the voltage value of FIG. 3A applied to the recording head. FIG. 4A is a diagram illustrating a conceptual configuration of the perforation forming apparatus of the present embodiment as viewed from the side. FIG. 4B is a diagram illustrating a conceptual configuration of the perforation forming device as viewed from the conveyance direction. FIG. 5 is a diagram showing a conceptual block configuration in the image recording apparatus. FIG. 6A is a diagram showing a perforation formation scheduled area when a normal image-recording recording medium is viewed from above. FIG. 6B is a diagram showing one perforation formed in the perforation formation scheduled region shown in FIG. 6A. FIG. 6C is a diagram illustrating a high-concentration perforation formation region illustrated in FIG. 6B. 6D is a diagram illustrating a perforation formed in the perforation formation planned region illustrated in FIG. 6C. FIG. 7A is a diagram illustrating a state where ink droplets land on a perforation formation scheduled area of a recording medium in the first embodiment. FIG. 7B is a diagram illustrating a cross-sectional shape of an ink layer that has landed and permeated a perforation formation scheduled region. FIG. 7C is a diagram illustrating a state immediately before the perforation blade is inserted into the perforation formation scheduled region. FIG. 7D is a diagram illustrating a state in which the perforation blade is inserted into the perforation formation scheduled region. FIG. 7E is a diagram showing a cross section of a recording medium on which perforations are formed. FIG. 8 is a diagram showing a perforation formation scheduled area by an ink ejection amount that does not reach the perforation depth. FIG. 9A is a diagram illustrating a state in which ink droplets land on a perforation formation scheduled region of a recording medium in the second embodiment. FIG. 9B is a diagram illustrating a cross-sectional shape of an ink layer in which an ink droplet has landed and permeated a perforation formation scheduled region. FIG. 9C is a diagram showing a cross section of a recording medium in which perforations are formed in the perforation formation scheduled area of the present embodiment. FIG. 10A is a diagram illustrating a state where ink droplets land on a perforation formation scheduled area of the recording medium according to the third embodiment. FIG. 10B is a diagram illustrating a cross-sectional shape of an ink layer in which an ink droplet has landed and permeated a perforation formation scheduled region. FIG. 10C is a diagram showing a cross section of a recording medium in which perforations are formed in the perforation formation scheduled area. FIG. 11 is a flowchart for explaining gradation change of ink droplets ejected to the perforation formation scheduled region. FIG. 12A is a cross-sectional view illustrating a state in which an image is recorded on the first surface (front surface) of the recording medium of the fourth embodiment. FIG. 12B is a cross-sectional view in which an image is recorded in the perforation formation scheduled area on the second surface (back surface) side. FIG. 12C is a cross-sectional view showing a state in which perforations are formed from the first surface side. FIG. 13A is a diagram illustrating an example of bitmap data based on image data. FIG. 13B is a diagram showing normal (non-grayscale change) recording bitmap data. FIG. 13C is a diagram illustrating an example of recording bitmap data including a recording area whose gradation has been changed. FIG. 14A is a schematic diagram illustrating a cross-sectional configuration of a perforation of a depression formed on a conventional recording medium where a base is exposed. FIG. 14B is a schematic diagram illustrating a cross-sectional configuration of a perforation of a through hole that exposes a base formed on a conventional recording medium. FIG. 14C is a schematic view of the perforation exposed from the ground shown in FIG. 14A viewed from the image recording surface side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration example of a first embodiment according to an ink jet recording apparatus which is an image recording apparatus of the present invention. In the following description, the direction from the upstream side to the downstream side in the conveyance direction of the recording medium is the X-axis direction, the width direction of the recording medium is the Y-axis direction, and the upper direction is the Z-axis direction.

  The ink jet recording apparatus 1 transports a feeding unit (unwinder) 2 that feeds a long recording medium 11 and the fed recording medium 11 and records an image on the recording medium 11 on the transport path. The apparatus main body 3 that cuts to a predetermined size and the discharge unit 8 that stores the cut recording medium 15 are configured. In the present embodiment, a roll paper wound as the recording medium 11 is shown. However, other than this, a long recording paper that is folded and the like can be applied. Further, not only paper but also a resin sheet, a film, and the like can be similarly applied. The roll paper has a width of 29.7 cm or 42 cm, for example.

  The feeding unit 2 mainly includes a recording medium 11 made of roll paper, a paper tube fixing shaft 5 that is mounted on the recording medium 11, a stand 6 that rotatably supports the paper tube fixing shaft 5, and a recording medium 11. And a brake 7 for applying braking to the supply speed.

  In the main body frame 14 of the apparatus main body 3, a first drum (driven drum) 20, a second drum (driving drum) 22, a tension roller 9a, and a roller comprising a plurality of free rollers disposed therebetween. And a transport path of the recording medium 11 configured by the group 9. A perforation forming device 50 and a cutter mechanism 4 are provided on the transport path downstream of the second drum. Further, a first image recording unit 12 and a first cleaning unit 27 for performing maintenance are provided above the first drum 20, and a second image recording unit 13 and a second cleaning unit 28 for performing maintenance are disposed above the second drum 22. Is provided. The drive drum is rotated by a drive source such as a motor to convey a recording medium, and the driven drum does not have a drive source and rotates with conveyance of a recording medium held so as to be wound.

  The brake 7 of the feeding unit 2 applies a back tension between the feeding unit 2 and the first drum 20 so that the recording medium 11 does not bend. The second drum 22 is connected to a motor 25, which is a power source, via a belt 26, and power for rotation is transmitted from the motor 25 when the recording medium is conveyed.

  The first image recording unit 12 is provided above the outer periphery of the first drum 20 (Z-axis direction), and the second image recording unit 13 is provided above the outer periphery of the second drum 22 (Z-axis direction). Yes. The first image recording unit 12 and the second image recording unit 13 are provided with an elevating mechanism (not shown). [Position] is moved up and down. In this embodiment, the image recording unit is arranged in the Z-axis direction of each drum so that the direction of ink ejection is the direction of gravity. Of course, the image recording unit is not limited to this Z-axis direction. The direction can be set as appropriate according to the specification.

  Each component in the apparatus main body 3 is driven and controlled by the control device 16. Specifically, the control device 16 performs an ink ejection operation from the nozzles in the recording heads 21 and 23, data processing of image data and perforation data input by the user, the perforation forming device 50, the motor 25, and the tension roller 9a. In addition, each drive in the cutter mechanism unit 4 and control of input / output of information with the user by image display on a monitor (not shown) are performed.

  The first image recording unit 12 and the second image recording unit 13 include a plurality of recording heads 21 and 23 (described later) arranged for each ink color. Each recording head records an image by ejecting ink of one color or a plurality of colors from the plurality of nozzles provided on the surface facing the recording medium 11 to the recording medium 11 being conveyed. These recording heads 21 and 23 are so-called line heads having a recording area (length of the nozzle row) exceeding the width of the recording medium 11. In addition to this, a plurality of short recording heads less than the width of the recording medium 11 are used, and two rows, for example, staggered, are alternately arranged in a direction orthogonal to the transport direction so that the recording area exceeds the width of the recording medium. It may be a recording head arranged in the above.

  When the recording medium 11 is wound around and conveyed by the first drum 20 and the second drum 22, the first image recording unit 12 causes the recording medium 11 to pass on the first surface (for example, the front surface side) of the recording medium 11 passing below. Image recording is performed, and then image recording is performed on the second surface (for example, the back surface side) of the recording medium 11 that passes below by the second image recording unit 13, and image recording is performed on the so-called different surfaces. Double-sided printing is performed. Thereafter, the recording medium 11 on which the image is recorded is sent to the perforation forming apparatus 50.

  The cutter mechanism unit 4 includes a nip roller pair 30 and a cutter roller pair 31 that are rotatably supported by the main body frame 14. One roller of the nip roller pair 30 is rotated by the drive motor 30 a and is conveyed downstream to the second drum 22 to the cutter roller pair 31 that cuts the continuous medium 11 without causing the recording medium 11 to bend. In the discharge unit 8, the recording medium 15, which is a cut medium cut to a predetermined length by the cutter roller pair 31, passes through the guide member and is accommodated in the discharge tray 33 from the discharge roller pair 32.

  The first image recording unit 12 includes a plurality of nozzles (nozzle rows) that eject ink of four colors, for example, cyan (C), magenta (M), yellow (Y), and black (K) in the transport direction. 21 (21C, 21K, 21M, 21Y). These recording heads 21 are attached and fixed to a head holding frame (not shown), and are held at the same distance interval (image recording position) with respect to the first drum 20 along the circumferential direction of the first drum 20. Yes. These distance intervals can be adjusted as appropriate. In exactly the same manner, the second image recording unit 13 also has a recording head 23 (23C, 23K, 23M, 23Y) and is attached to and held by a head holding frame. In the present embodiment, the recording heads 21 and 23 using four colors of ink are taken as an example, but other than this, the number of ink colors may be increased or decreased.

The resolution of each recording head 21, 23 is, for example, 300 dpi, 600 dpi, or 1200 dpi, that is, has a nozzle interval of 85 μm, 42 μm, or 21 μm.
Further, these recording heads 21 and 23 are configured to eject ink from nozzles by applying vibration to the ink chamber by driving a piezoelectric actuator, for example, and the ink ejection amount (volume depending on the number of ejections and the like) is multivalued. It can be controlled. For example, the volume of ink ejected to one pixel can be controlled to N + 1 gradations from the 0th gradation in which no ink is ejected to the Nth gradation of the maximum volume that can be ejected. N is, for example, 5. The ejected ink volume of the nth gradation is expressed by, for example, nx (a constant depending on the driving voltage).

  The ink ejection amount depends on the drive voltage of the actuator. Generally, the higher the drive voltage, the greater the ejection amount (ink volume). The drive voltage of the actuator can be set for each actuator corresponding to each nozzle. That is, the ink amount can be controlled for each pixel by the driving voltage.

Next, an ink ejection operation in the recording head 21C will be described with reference to FIGS. 2A to 2G and FIGS. 3A to 3C. Here, the recording head 21C will be described as an example, but the other recording heads also perform the same ink ejection operation.
2A to 2G are schematic views showing a cross-sectional configuration including the ink chamber 21CC filled with ink and the nozzle 21CN in the recording head 21C. FIGS. 3A to 3C show driving voltages composed of pulses applied to the recording head 21C.

An actuator 21CA made of a laminated piezoelectric element is disposed on the side surface of the ink chamber 21CC. The actuator 21CA causes mechanical displacement when a voltage is applied. Hereinafter, the operation will be described in the order of time.
First, at time T0 to T1, the actuator 21CA is stationary, the ink chamber 21CC is in a negative pressure due to a head difference with an ink tank (not shown), and a concave ink meniscus is formed in the nozzle 21CN. Yes.

Next, when the control device 16 determines that it is necessary to eject ink from the pixel in charge of the nozzle 21CN in order to record the input image on the recording medium 11 at time T1, the voltage V0 and the time width are determined. A pulse voltage of t0 is applied to the actuator 21CA from a drive output circuit (not shown) in the control device 16.
At this time, as shown in FIG. 2B, the actuator 21CA is displaced so as to protrude to the inside of the ink chamber 21CC, and the liquid column 21CP is pushed out from the nozzle 21CN by a sound wave accompanying this.

  Further, when no pulse voltage is applied at time T2, as shown in FIG. 2C, the actuator 21CA returns to its original shape, and due to the accompanying sound wave, the liquid column is at a timing T4 after T3 after t0. 21CP is cut off and flies toward the recording medium 11 as an ink droplet 21CD. Here, the diameter of the nozzle 21CN is, for example, 20 μm, the time width t0 is, for example, 1 μs, the speed of the liquid column 21CP or the ink droplet 21CD is, for example, 10 m / s, and the distance between the nozzle 21CN and the recording medium 11 is, for example, 1 mm.

Next, a method for ejecting ink droplets of a plurality of gradations, for example, the third gradation will be described.
One drive of the actuator 21CA in this embodiment is as high as 2 × t0 = 2 μs. As shown in FIG. 3B, for example, three continuous pulse voltages are applied to the actuator 21CA.

  At the time T5 when the third pulse voltage is applied, as shown in FIG. 2D, the liquid column 21CP has the liquid droplets 21CP1, 21CP2 that are not separated by the first and second pulse voltages, and the third time. It consists of a liquid column 21CP3 by a pulse voltage. Thereafter, the liquid column 21CP3 is cut off, and at time T6, the droplets 21CP1 and 21CP2 and the liquid column 21CP3 are collected into one droplet 21CD as shown in FIG. 2E due to surface tension.

The droplet 21CD becomes a liquid column having a volume three times that of the droplet 21CP to which only one pulse voltage is applied in FIG. 3A. As described above, normally, by applying the pulse voltage continuously M times, ink ejection of the Mth gradation is realized.
As described above, the recording heads 21 and 23 can eject ink droplets of a plurality of gradations.

Further, as another ink amount control means for ejecting ink droplets having different volumes, there is a method of applying a pulse voltage shown in FIG. 3C to the actuator 21CA.
If the pulse voltage to be applied is a voltage value V1 larger than the voltage V0 shown in FIG. 3A, as shown in FIG. 2F, the displacement of the actuator 21CA becomes larger than the case where V0 is applied. As shown in FIG. 4, a larger volume of the droplet 21CD can be ejected.

4A and 4B describe the configuration of the perforation forming apparatus 50. FIG.
4A is a diagram illustrating a conceptual configuration of the perforation forming device 50 according to the present embodiment as viewed from the side, and FIG. 4B is a diagram illustrating a conceptual configuration of the perforation forming device 50 as viewed from the conveyance direction. It is.

  The perforation forming device 50 rotatably holds a disk-shaped blade wheel 50A provided with a plurality of perforating blades 50E having the same shape on the outer circumference, an anvil roller 50B rotatably supported, and a blade wheel 50A. It is constituted by a blade holding part 50C. The blade wheel 50A is disposed to face the anvil roller 50B with the recording medium 11 in between.

  The blade wheel 50A forms a perforation 40 by piercing the recording medium 11 on the anvil roller 50B with a sewing blade 50E having a sharp tip. In the present embodiment, the material of the blade wheel 50A is, for example, a hard metal such as stainless steel. However, the present invention is not limited to metals, but can be employed as long as it is a hard member other than metal, such as ceramics. When a plurality of sewing blades 50E of the present embodiment are used, it is assumed that the same shape is used, but sewing blades having different sizes and shapes may be mixed.

  Since the recording medium 11 is conveyed with the sewing blade 50E inserted into the recording medium 11 or pierced, the blade wheel 50A rotates to follow the conveyance. Along with this rotation, the perforation blades 50E are sequentially inserted into the recording medium 11, and perforations 40 connected in synchronization with the rotation of the blade wheel 50A are formed in the recording medium 11.

  The blade holding unit 50C is provided with a moving mechanism (not shown), and the movement of the interval between the sewing blade 50E and the anvil roller 50B and the movement of the recording medium 11 in the width direction are performed. Among these movements, the movement of the interval forms the perforation by the perforation blade 50E at the perforation forming position where the perforation blade 50E is close to the anvil roller 50B. On the other hand, at the non-perforation forming position (retracted position) where the perforation blade 50E is separated from the anvil roller 50B, the perforation blade 50E is separated from the recording medium 11 and no perforation is formed. By the movement of this interval, formation or non-formation of the perforation 40 can be arbitrarily controlled.

  Further, the blade holding unit 50C can be moved in the width direction of the recording medium 11 by a moving mechanism. At this time, the direction of the blade holding portion 50C is rotated so that the rotation direction (perforation forming direction) of the blade wheel 50A coincides with the moving width direction. By this movement, the perforation 40 can be formed at an arbitrary position in the width direction of the recording medium 11. That is, when forming a perforation that crosses the recording medium 11 in the width direction, the direction of the blade holding portion 50C is changed by 90 °, and the blade wheel 50A is rotated by the moving mechanism while the width direction of the recording medium 11 is changed. Moved to. In these cases, the anvil roller 50B is in contact with the back surface of the recording medium 11.

Next, an image recording operation on the recording medium 11 will be described.
Image data for recording and perforation formation position data input from an external device are input. Here, the perforation position data relates to the image data, and includes at least information on the formation start position and the formation end position of the perforation and the extending direction of the perforation to be formed.

  According to the perforation formation position data, the blade holder 50C moves to the perforation formation position together with the blade wheel 50A, and then the rotation of the second drum 22 and the tension roller 30 is started.

In accordance with these rotations, the first image recording unit 12 and the second image recording unit 13 form an image on the surface of the recording medium 11.
Specifically, based on the color data of each pixel of the image input by the user, the ink of the ejection volume corresponding to the gradation is recorded in accordance with the transport timing of the recording medium 11, and the recording heads 21C, 21K, 21M. , 21Y are sequentially injected.

  Image data input by the user to the control device 16 is converted into bitmap data having a width X and a length Y as shown in FIG. The gradation of the pixel ejected by the i-th nozzle at the j-th is described as Mij. The width X matches the number of ejection nozzles of the recording heads 21C, 21K, 21M, and 21Y of the first image recording unit 12.

  In this recording bitmap data, the gradation Mij of each pixel on the data coincides with the gradation of the ink droplet ejected as it is. At this time, for example, an encoder pulse of the second drum 22 is acquired by a rotary encoder or the like, and the recording heads 21C, 21K, 21M, and 21Y perform the ejecting operation in synchronization therewith, thereby matching the timings of transport and ink ejection. . Subsequently, the recording heads 23 </ b> C, 23 </ b> K, 23 </ b> M, and 23 </ b> Y record images on the back surface of the recording medium 11 from the time when the leading end portion of the recorded image on the conveyed recording medium 11 reaches the second drum 22.

  Further, when the leading end portion of the recording medium 11 on which images are recorded on both the front and back surfaces reaches the perforation forming device 50, the blade holding portion 50C and the front end 50E of the blade wheel 50A and the anvil roller 50B based on the perforation forming position data. A perforation is formed in the recording medium 11 by sequentially switching between contact and non-contact with. Thereafter, the sheet passes through the tension roller 30, is cut into a predetermined length by the cutter mechanism 31, and is stored in the discharge tray 33, and the image recording is completed.

With reference to FIG. 5, control of image recording in the image recording apparatus of the present embodiment will be described. FIG. 5 is a diagram showing a conceptual block configuration J1-J5 in the image recording apparatus.
First, in the J1 block, the image data that the user desires to record on the external device, the perforation position data that specifies the position at which the perforation is to be formed on the image data, the number of recordings, the recording medium size, etc. Information (print information) is created and transmitted to the control device 16.

  In the J2 block, the image data received by the control device 16 is converted into bitmap data for recording, and the received perforation position data is converted into position information in the width direction of the recording medium 11 on which the perforations are formed, and the blade wheel 50A. The contact / separation timing information is converted into a perforation formation signal. At the time of this bitmap data conversion, the tone change of the image data in a perforation formation scheduled area described later is performed. Further, at this time, the control device 16 starts the conveyance drive with respect to the components such as the feeding unit 2, the motor 25, the tension rollers 9 a and 30, and the cutter mechanism 31 so as to stably convey the recording medium 11. To instruct.

  In the J3 block, the constituent parts of the transport path stably transport the recording medium 11 so as to be suitable for image recording in accordance with the control signal received from the control device 16 in the J2 block. In the J2 block, when there is position information in the width direction of the recording medium 11 among the perforation formation control signals transmitted by the control device 16, the blade holding unit 50C of the perforation forming device 50 receives and forms the information. The blade holder 50C is moved to the start position. Thereafter, when the stable conveyance of the recording medium 11 and the completion of the movement of the blade holder 50C are realized, the control device 16 transmits an image recording permission signal to the recording heads 21, 23 and the perforation forming device 50. .

In the J4 block, the recording bitmap data transmitted from the control device 16 in the J2 block is input to the recording heads 21 and 23. Of the perforation control signal, contact / separation timing information is input to the perforation forming apparatus 50. Further, when the recording permission signal is received, the recording heads 21 and 23 perform image recording, and the perforation forming device 50 forms a perforation on the recording medium on which the image is recorded. Further, when the image recording (printing) of the number of recording sheets included in the recording information is completed, a recording end signal is transmitted to each constituent part constituting the conveyance path.
Further, in the J5 block, when each constituent part constituting the conveyance path receives the image recording end signal transmitted from the control device 16 in the J4 block, each constituent part is stopped and the image recording operation is ended.

A perforation forming process in the image recording apparatus 1 of the present embodiment will be described with reference to FIGS. 6A to 6D and FIGS. 7A to 7E.
FIG. 6A is a diagram showing a perforation formation scheduled area 40S when the recording medium 11 is viewed from above when normal image recording is performed. FIG. 6B is an enlarged view of one perforation in the perforation formation scheduled area 40S. FIG. 6C is a diagram showing that an image having a high density is formed in the perforation formation scheduled region 40S in FIG. 6B. FIG. 6D is a diagram illustrating a perforation formed in the perforation formation scheduled region 40S illustrated in FIG. 6C. 7A to 7E are views showing a cross section of the recording medium for explaining the image recording process including the perforation formation scheduled region and the perforation forming process in this embodiment. Normally, the perforation formation planned area includes an area where an image is formed and an area where an image is not formed. In the following description, the perforation formation data is included in the perforation formation position data. The eye formation scheduled area will be described as an area where a perforation is formed on some image recorded on the recording medium (an overlapping area of the image and the perforation). Further, when forming a perforation in a region where no image is formed, the gradation change described below (increasing the amount of ink landing per unit area) is not performed.

  In the present embodiment, when an image is recorded by ejecting ink onto the recording medium 11, a perforation area 40S (perforation formation scheduled area) 40S is formed on the image shown in FIG. 6A. As shown in FIG. 6B, by increasing the amount of ink ejected and increasing the amount of landing per unit area, this perforation formation scheduled area 40S is formed in another image area (non-overlapping area: perforation). The image density is set higher than the non-perforated area.

  As shown in FIG. 7A, the control unit 16 causes the ink amount to land on the perforation formation scheduled area 40S having a width of about one pixel to increase more than the ink amount to land on the surrounding non-perforation formation area. In addition, the ink ejection amount is adjusted. Specifically, when the non-perforated line formation region has the Mth gradation, it is set to the Lth gradation (M <L ≦ N) which is increased more than this, for example. This process is performed when the image data and the perforation formation position data are input to the control unit 16, for example, when the image data is the solid cyan image data of the Mth gradation. The cyan image data recorded in the perforation formation scheduled area 40S obtained from the position data is changed from the Mth gradation to the Lth gradation.

  This gradation change is executed when the control unit 16 converts the data into recording bitmap data in the J2 block shown in FIG. The gradation change will be described in detail with reference to the normal recording bitmap data shown in FIG. 13B and the recording bitmap data including the recording area in which the gradation is changed in the present embodiment shown in FIG. 13C.

  For the recording bitmap data of the M-th gradation filled image shown in FIG. 13B, the perforation formation scheduled area 40S is set from the q-th pixel to the q + r-th pixel of the p-th nozzle, for example. As shown in FIG. 13C, recording bitmap data is created by changing the Mth gradation to the Lth gradation from the qth pixel to the q + rth pixel of the p-th nozzle. Image recording is executed using the changed recording bitmap data.

  As shown in FIG. 7B, in the image recording with such a gradation change, the perforation formation planned area 40S has an inclination (taper angle) 11b from the surface of the recording medium 11 in the depth direction from the periphery thereof. The ink penetration depth is deep. When viewed from above, as shown in FIG. 6B, the concentration of the perforation formation planned region 40S is higher than the surrounding area. In the present embodiment, the perforation formation scheduled area 40S is described as an example with a minimum pixel unit width that matches the width of the blade when the sewing blade 50E is inserted. However, in reality, blurring or the like also occurs in the rotation of the sewing blade 50E due to an operation error in a mechanism for bringing the sewing blade 50E into contact with the recording medium 11, a manufacturing error, or the like.

  Therefore, the width of the perforation formation scheduled area 40S and the width of the perforation need not be completely matched. Even if the insertion position of the sewing machine blade 50E is shifted, the perforation formation scheduled area width is set so as to have an appropriate width so that the sewing machine blade 50E is inserted into the area where the gradation is changed so as to increase the density. You may do it.

  Similarly, when it is difficult to make the perforation formation region 40S completely coincide with the perforation formation region 40S in the advancing direction of the perforation, a plurality of perforations are formed in the advancing direction in which the perforation is formed. A perforation formation scheduled region 40S that is continuous over the perforations may be set. For example, in FIGS. 13B and 13C, among the pixels in charge of the p-th nozzle, all the pixels in charge of the p-th nozzle including pixels that are not actually in contact with the sewing blade 50E are defined as the perforation formation scheduled region 40S. The above gradation change may be implemented.

  Next, the recording medium 11 on which the image is recorded is conveyed to the perforation forming apparatus 50. The perforation is formed by inserting the perforation blade 50E into the perforation formation scheduled area 40S of the recording medium 11, as shown in FIGS. 7C and 7D. When the sewing blade 50E is extracted from the recording medium 11, the ink permeation portion is exposed on the surface 11S of the concave portion of the perforation 40 as shown in FIG. 7E.

  Thereby, also in the perforation 40, since the image is formed with substantially the same hue as the periphery thereof, the deterioration of the image quality due to the perforation 40 is suppressed. As described above, the background of the recording medium 11 is hardly exposed on the surface 11S of the perforation 40 shown in FIGS. 14A and 14B, and the perforation in the image can be made inconspicuous.

With reference to the flowchart shown in FIG. 11, the gradation change of the ink droplet ejected to the perforation formation scheduled area 40S of the present embodiment will be described.
First, the user inputs image data and perforation position data (step S1). In the image recording apparatus 1, it is assumed that the initial setting for performing the image recording operation and the perforation forming operation has been completed. At the time of inputting the image data and the perforation position data, the cutting size of the recording medium 11, the number of recorded sheets, and the like are set as appropriate.

  Next, referring to the perforation position data, in the input image data, whether or not a perforation is formed at the position where the image is recorded, that is, an adjustment target pixel that needs to perform ink gradation Is determined for all the pixels (step S2). If there is no gradation change target pixel in this determination (NO), the process proceeds to step S4 described later. In this determination, the determination processing may be omitted for pixels whose image data density is 0 (non-recording blank paper).

  On the other hand, if there is a pixel to be adjusted in the determination (YES), the penetration depth of the ink in the perforation formation scheduled region 40S is as shown in the cross section of FIG. 7B, FIG. 8, FIG. 9B, or FIG. Then, for each ink color, the gradation of the density data of the adjustment target pixel is changed to increase the ink ejection amount by a predetermined amount so as to be sufficiently deeper than the cutting depth by the sewing machine blade 50E. The amount of increase is obtained empirically by actually recording, for example, perforation forming device (perforator) such as ink color, temperature, physical properties such as density / viscosity, recording medium color, thickness, surface processing, etc. ) Of the sewing machine blade, the recording medium conveyance speed, the resolution of the recording head, the gradation of the ejection volume, the density value on the image data, and the like. These numerical values may be determined by creating a table as parameters, setting the conditions for recording as appropriate, and selecting the parameters.

  Next, when the ink increase amount is determined, or when there is no adjustment target pixel in step S2 (that is, the image does not overlap with the perforation) (NO), image recording is performed as described above ( Step S4) Subsequently, the perforation forming apparatus 50 forms a perforation on the recording medium 11 based on the perforation position data (step S5). Thereafter, the cutter mechanism unit 4 cuts the recording medium 11 into a set size (step S6), the cut recording medium 15 is accommodated in the discharge unit 8 (step S7), and image recording is completed.

  In this embodiment, since the ink penetration depth is at least about the perforation depth, the ink landing amount (ink ejection amount) depends on the material of the recording medium 11 and the perforation depth (thickness of the recording medium). The amount of ink is required to achieve at least an ink penetration depth of the Lth gradation or more.

  As shown in FIG. 8, even if the ink penetration depth does not reach the perforation depth, the ink landing amount in the perforation formation scheduled region 40S is increased from the initially planned ink landing amount, so that the ink penetration is achieved. By increasing the depth, the exposed area of the base on the surface 11S of the recording medium 11 on which the perforation 40 is formed can be reduced as compared with the conventional exposed area of the base shown in FIG. The image has a certain effect of suppressing the deterioration of the image quality.

Next, a second embodiment will be described with reference to FIGS. 9A to 9C.
FIG. 9A is a diagram illustrating a state where ink droplets land on the recording medium 11 having the perforation formation scheduled area 40S in the second embodiment. FIG. 9B is a cross-sectional view of the recording medium 11 and shows the penetration depth of ink. FIG. 9C is a diagram showing a cross section of a recording medium in which perforations are formed in the perforation formation scheduled region 40S of the present embodiment.

  In the first embodiment described above, the description has been given of the case where the width of the perforation formation planned region 40S is substantially equal to the width of the sewing blade 50E, and the width is approximately one pixel. Is different from the first embodiment in that the width of the perforated formation region 40S corresponds to approximately 3 pixels.

  When the resolution of the recording heads 21 and 23 is relatively high with respect to the blade width (perforation width) of the perforation blade 50E, a plurality of pixels are included in the perforation formation scheduled area 40S. As an example, when the width of the perforation formation scheduled area 40S corresponds to 3 pixels as shown in FIG. 9A, and the image data is a solid cyan image data of the M-th gradation, one center pixel The ink amount is the Lth gradation, and the adjacent pixels eject ink droplets by changing the gradation of the Kth gradation (M <K ≦ L ≦ N or M ≦ K <L ≦ N).

  By landing a plurality of ink droplets of these different gradations on the recording medium 11, as shown in FIG. 9B, the ink is deposited in the ink layer thickness (the depth of the ink penetration portion) or the perforation formation region 40S. The inclination (taper angle) 11a on both sides of the penetrated portion can be controlled more finely. This inclination 11b is a shallow angle close to the blade angle of the sewing machine blade 50E as compared with the inclination 11b through which ink permeates as shown in FIG. 7E. As a result, it can be formed so that the inclination after the formation of the perforation 40 is the same as the inclination of both ends of the perforation formation planned region 40S. As a result, compared to the case where the width of the perforation formation planned area 40S shown in FIG. 7E is one pixel, the difference in thickness of the ink layer after forming the perforation 40 is reduced, and the density at the perforation is reduced. It is possible to make it more approximate to the peripheral density, and it is possible to make the problem that the perforation becomes conspicuous as the density becomes high.

  When the perforation formation planned area 40S extends over a plurality of pixels, if the perforation blade has a single tip at the center in the width direction, the perforation formation planned area 40S corresponds to the center of the perforation formation planned area 40S. It is preferable to make the ink landing amount the largest. However, if the injection amount is controlled to be increased by at least one pixel in the perforation formation scheduled area 40S, there is a certain effect that the white of the background becomes inconspicuous. For example, when it is difficult to determine the position of the perforation 40 with high accuracy, the perforation position can be changed by changing the gradation so as to increase only the injection amount for the pixel at the center position among the plurality of pixels. Even if some deviation occurs, certain effects can be surely obtained.

Next, a third embodiment will be described with reference to FIGS. 10A to 10C.
FIG. 10A is a diagram illustrating a state where ink droplets land on a perforation formation scheduled area of a recording medium in the third embodiment. FIG. 10B is a diagram illustrating a cross section of an ink layer in which an ink droplet has landed and permeated a perforation formation scheduled region. FIG. 10C is a diagram showing a cross section of a recording medium in which perforations are formed in the perforation formation scheduled area of the present embodiment.

In the first and second embodiments described above, the example in which the ink droplets land on the central portion in the width direction of the perforation formation scheduled region 40S has been described. However, the central portion of the perforation formation planned region 40S and the recording pixel do not necessarily match. Not always.
That is, as shown in FIG. 10B, the width of the perforation formation planned area 40S is about one pixel wide, but as shown in FIG. 10A, the center of the perforation formation planned area 40S (the perforation blade 50E). Since the recording pixel exists at a position shifted from the position where the tip abuts, there is a case where ink cannot be landed on the central portion of the area 40S. This occurs because the central portion of the perforation formation scheduled area 40S is displaced from the nozzle position of the recording head 21 immediately above it.

  In the present embodiment, according to the size of the distance 40SD1 between the center 40SC of the perforation formation scheduled region 40S and the center of the ink droplet (first proximity ink droplet) 121A that lands at the closest position of the center 40SC. The gradation L1 is determined, and the ink droplet 121A is ejected at the L1 gradation. For example, in the case where the image data is the M-th gradation uniform cyan image data, the gradation L1 is M <L1 <L, L1 = L− [A × 40SD1] (A is a proportional constant) ).

Next, the ink droplet second closest to the center 40SC is set as the second proximity ink droplet 121B, and the gradation is determined according to the size of the distance 40SD2 between the center 40SC and the center of the second proximity ink droplet 121D2, for example. The tone L2 is set, and the ink droplet 121D2 is ejected at the L2nd gradation.
Here, for example, settings are made so as to satisfy the gradation M <L2 <L1, L2 = L− [B × 40SD2] (B is a proportionality constant).

  As described above, each level of the ink droplet (first ink droplet) that lands closest to the center 40SC of the perforation formation planned region 40S and the ink droplet (second ink droplet) that lands next closest to the center 40SC. By adjusting the tone, an ink permeation portion having an inclination of the ink permeation depth at the bottom as shown in FIG. 10B is formed in the perforation formation region 40S. A perforation 40 as shown in FIG. 10C is formed in the perforation formation scheduled region 40S. When the width of the perforation formation planned area 40S (perforation blade 50E) is a plurality of pixels, that is, when landing of a plurality of ink droplets is required, each ink droplet is the same as in the second embodiment. It is sufficient to set the degree of gradation.

The present embodiment can suppress the exposed area of the base in the cross section 11S of the recording medium 11 on which the perforations 40 are formed, while suppressing an excessive ink penetration depth around the perforations 40.
In the first to third embodiments, the depth of the perforation 40 is generally relatively shallow at the front end 40SI and the rear end 40SE (see FIG. 6A) of the perforation formation scheduled region 40S. Control that relatively decreases the increment of the ink ejection amount may be performed. By performing such control, it is possible to obtain the image quality deterioration suppressing effect due to the formation of perforations in the same manner as other portions.

  In the above, each embodiment in which the perforation is formed in the width direction of the recording medium 11 has been described. However, when the perforation is formed in the conveyance direction of the recording medium 11, the perforation formation schedule shown in FIG. Of the region 40S, it is established except for the front end 40SI and the rear end 40SE.

  In the description of each of the first to third embodiments described above, the method of increasing the ink gradation, that is, the method of increasing the ejection volume by increasing the number of ejections of the same volume of ink droplets to be ejected has been described. However, the present invention is not limited to this. For example, the ejection volume may be increased by increasing the displacement of the actuator by further increasing the drive voltage applied to the actuator of the nozzle of the recording head, thereby increasing the ejection amount of one drop of ink. Further, gradation and driving voltage adjustment may be combined. By combining the adjustment of the gradation and the driving voltage, it is possible to finely adjust the ejection volume.

  In each embodiment, by increasing the amount of ink ejected to the perforation formation planned area as compared with the case where no perforation is formed, the exposure of the background of the recording medium at the perforation formation position is suppressed as much as possible. As a result, the white lines caused by the image can be made inconspicuous, and the deterioration of the image quality due to the perforation can be suppressed.

  Note that the process of increasing the ink ejection amount to the perforation formation scheduled area may be selectively performed. In other words, the ink gradation change is not performed on the portion where the user wants to make the perforation 40 intentionally conspicuous, and only the portion where the perforation 40 is not desired to be conspicuous is selectively used. Ink gradation change (increase) may be performed. In addition, since the degree of ink increase differs from the degree of ink removal to the back surface, the user may be able to select a desired increase amount.

  The recording head described above is a fixed (non-scanning) line head. However, the recording head is not limited. Similarly, even in the case of a scanning serial head, the ink gradation change (perforation formation region) ( Since the injection amount increasing process) can be performed, the above-described effects can be achieved equally. In the above description, the perforation forming direction is a direction parallel to or perpendicular to the conveyance direction of the recording medium, but is not limited thereto, and the perforation formation direction is the conveyance direction of the recording medium. Even if it is formed at an arbitrary angle, the same effect can be obtained by recording the perforation formation scheduled area by the same gradation change.

Next, a fourth embodiment will be described with reference to FIGS. 12A to 12C.
FIG. 12A is a cross-sectional view showing a state where an image is recorded on the first surface (front surface) of the recording medium. FIG. 12B is a cross-sectional view in which an image is recorded in the perforation formation scheduled area on the second surface (back surface) side. FIG. 12C is a cross-sectional view showing a state in which perforations are formed from the first surface side. In the configuration of the present embodiment, the description of the configuration equivalent to that of the first to third embodiments described above will be omitted, and the features that are characteristic of the present embodiment will be described.

  In the present embodiment, when the image 10 is recorded on the front surface of the recording medium 11, the ink gradation change (increase in the ejection amount) in the perforation formation scheduled area 40S is not performed, and the perforation formation scheduled area on the back side thereof is not performed. So-called backing recording is performed in which the same color ink is ejected onto the area corresponding to 40S.

  In FIG. 12A, the recording head 21 records, for example, the cyan image on the entire surface of the recording medium 11 on the first drum 20 only on the surface that forms the perforation forming surface. After that, as shown in FIG. 12B, the area corresponding to the perforation formation scheduled area 40S on the back surface side of the recording medium 11 on the second drum 22 is made with the same cyan ink as the front surface and more than the Mth gradation. Filled images with low gradation are recorded symmetrically (so as to overlap) as the back image 11T.

  Next, as shown in FIG. 12C, perforations 40 are formed from the surface side of the recording medium 11. Accordingly, in FIG. 12C, when the image is viewed from the front side, the perforated part is transmitted light from the back side and the light that enters the recording medium 11 from the front side and is reflected by the back side image 11T is substantially the same as the front side image 10. Since the hues are the same, the perforation 40 is not conspicuous and image quality degradation is reduced.

  Note that a small amount of ink is sufficient for the perforation formation scheduled area 40S on the back surface as described above. However, if the image quality on the back surface is not a problem, a large amount may be ejected. Although the increase in the injection amount on the surface of the perforation formation scheduled region 40S is not performed, the same effect can be obtained even if it is performed. Further, since the ink penetrates from both sides, it is particularly effective for the recording medium 11 in which the ink hardly penetrates.

  As described above, in the present embodiment, the back image 11T is recorded at the position corresponding to the perforation formation scheduled area 40S on the back surface side of the recording medium. In the portion, the lowering of image quality due to the perforation 40 is reduced by the back image 11T.

  In the above description, the case where the perforation area and the ink ejection area overlap has been described. However, the present embodiment may be effective for a perforation area that is not an ink ejection area. For example, when an image such as a pattern is formed in advance on the recording medium 11 before the recording operation is performed by the inkjet recording apparatus 1, and the image is overwritten by the inkjet recording apparatus 1 to form a perforation. The pattern information and the perforation information are not used to perform the recording operation by the recording heads 21 and 23, but the perforation occurs in the pattern portion by applying this embodiment to the pattern portion to be formed. Perforations can be made inconspicuous. The pattern information can be input to the control device 16 in advance or can be obtained before the recording operation is performed by a line camera or the like.

  In each of the above-described embodiments, in order to increase the ink penetration depth, the amount of ink landing per unit area on the recording medium is increased. Specifically, the amount of ink ejected from the recording head is increased. Although increasing, the present invention is not limited to this. For example, although the ink ejection amount does not change, the recording head may be scanned a plurality of times for the same recording pixel, and the ink may be landed a plurality of times on the same recording pixel. Alternatively, the flying directions of the plurality of inks ejected from the plurality of nozzles may be deflected and landed on the same recording pixel.

According to each embodiment described above, the gist of the following invention is included.
(1) An ink jet head that ejects ink onto a recording medium based on image data input by a user, an ink amount control unit that controls the amount of ink ejected from the ink jet head, and an image of the recording medium on which image recording has been performed An inkjet recording apparatus comprising: perforation forming means for forming perforations based on perforation data input by a user with respect to a recording surface; and perforation control means for controlling the perforation forming means,
In a case where an image recording portion that requires ink ejection in the image data overlaps with a perforation forming portion in the perforation data, the ink amount control means applies to at least the region including the overlapping portion. An ink jet recording apparatus, wherein the ink ejection amount of the ink jet head is increased from an image recording portion that requires ink ejection in the image data and a portion where a perforation forming portion of the perforation data does not overlap.
(2) An inkjet recording apparatus capable of recording on both sides of the recording medium,
Item (1) is characterized in that an image having substantially the same hue as the image recording surface is recorded on the back surface of the surface on which the perforation is formed by the perforation forming means in the region including at least a part of the overlapping portion. The ink jet recording apparatus described.

  DESCRIPTION OF SYMBOLS 1 ... Inkjet recording apparatus, 2 ... Feeding part, 3 ... Apparatus main body, 4 ... Cutter mechanism part, 5 ... Paper tube fixing shaft, 6 ... Stand, 7 ... Brake 7, 8 ... Discharge part, 9 ... Roller group, 9a ... tension roller, 11, 15 ... recording medium, 12 ... first image recording section, 13 ... second image recording section, 14 ... main body frame, 16 ... control device, 20 ... first drum, 21, 23 ... recording head, 22 ... second drum, 25 ... motor, 26 ... belt, 27 ... first cleaning unit, 28 ... second cleaning unit, 30 ... nip roller pair, 30a ... drive motor, 31 ... cutter roller pair, 32 ... discharge roller pair, 33 ... discharge tray, 50 ... perforation forming device.

Claims (12)

A recording head that ejects ink toward a recording medium based on image data;
An ink amount control means for controlling an ink landing amount per unit area in the recording medium;
Perforation forming means for forming perforations on the recording medium on which image recording has been performed based on perforation position data;
An image recording apparatus comprising:
The ink amount control means determines an ink landing amount per unit area with respect to a region where an image recording portion that requires ink ejection in the image data and a perforation forming portion in the perforation position data overlap on a recording medium. An image recording apparatus characterized in that the amount of ink landing is larger than the amount of ink landing per unit area other than the overlapping region.   The image recording apparatus according to claim 1, wherein the ink amount control unit increases an ink ejection amount ejected from a recording head to the overlapping region. The recording head is capable of recording an image on the front and back surfaces of the recording medium,
The perforation forming means forms a perforation on the recording medium from the surface side of the recording medium,
The ink amount control means applies to a surface side area of a recording medium where a surface side image recording portion that requires ink ejection in the image data on the surface side of the image data and a perforation forming portion in the perforation position data overlap. The image recording apparatus according to claim 2, wherein an ink ejection amount of the recording head is increased more than an ink ejection amount of the recording head for areas other than the overlapping region. The recording head is capable of recording an image on the front and back surfaces of the recording medium,
The perforation forming means forms a perforation on the recording medium from the surface side of the recording medium,
The ink amount control means applies to a recording medium back side in a region where a surface side image recording portion that requires ink ejection in the image data on the front side of the image data and a perforation forming portion in the perforation position data overlap. 3. The image recording apparatus according to claim 2, wherein the ink is ejected from the recording head so that the ink lands.   5. The image recording apparatus according to claim 3, wherein the ink amount control unit controls the ink ejection amount so that the ink ejection amount with respect to the center of the overlapping region is maximized within the overlapping region.   The ink amount control means uses an ink having the same hue as an ink used for recording an image in an area around the overlapping area as an ink for increasing an ink ejection amount in the overlapping area. Or the image recording device of 4. A recording head that ejects ink to a recording medium based on image data;
Perforation forming means for forming perforations on the image recording surface of the recording medium before recording based on the perforation position data;
Based on the image data and the perforation position data, the amount of ink landing on an area where an image recording portion that requires ink ejection in the image data and a perforation forming portion in the perforation position data overlap on a recording medium Ink amount control means for controlling
An image recording apparatus comprising: A recording head for recording an image by ejecting ink droplets on a recording medium based on the image data;
An ink amount control unit for controlling the ink ejection amount of the recording head;
A perforation forming unit that forms perforations on the recording medium on which image recording has been performed based on perforation position data related to the image data;
With
The ink amount control unit is configured to land an ink landing amount on a non-overlapping region with respect to an overlapping region between an image recording portion where the ink droplet is landed based on the image data and a perforation forming portion based on the perforation position data. An image recording apparatus which ejects ink so as to increase more than the amount of ink. The recording head includes a first recording head that records an image on the front surface of the recording medium, and a second recording head that records an image on the back surface of the recording medium,
The perforation forming portion has a perforation blade that is inserted from the surface side of the recording medium to form the perforation,
9. The image according to claim 8, wherein the ink amount control unit acquires perforation position data including information on an insertion start position and a drawing position of the perforation blade and an extension direction thereof when the image data is input. Recording device. When the width of the perforation formed by the progress of the sewing blade reaches a plurality of the ink droplets,
The ink ejection amount of the ink droplets that land at the center position of the perforation width of the plurality of ink droplets is larger than the ink droplets positioned on both sides thereof. Image recording device. When the width of the perforation formed by the progress of the perforation blades extends to a plurality of the ink droplets and the central position of the width of the perforation is shifted from the center of any ink droplet,
10. The image recording according to claim 9, wherein the ink droplet closest to the central position is increased to a maximum ink ejection amount among all ink droplets, and the increment of the ink ejection amount is decreased as the distance is further increased. apparatus. After ink is ejected from the first recording head and an image is recorded on the first surface of the recording medium,
The second recording head ejects the same ink as the ink ejected from the first recording head onto the second surface of the recording medium facing the region where the perforation is formed, thereby forming a backing image. The image recording apparatus according to claim 9, wherein:

Images