JP2012051266A - Image recording apparatus and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image recording apparatus which is capable of highly accurately performing vertical perforation work and whose control and configuration for performing the vertical perforation work are simple, and to provide a method for controlling the image recording apparatus.SOLUTION: A perforation detection part 7 detects the position of a perforation inserted in a recording medium after the perforation work by a perforation insertion part 6. A previously set amount Xp is calculated from conveyance information output by a conveyance information generation part 22a and the detection result by the perforation detection part 7. The perforation work is controlled according to the amount Xp.

Description

  The present invention relates to an image recording apparatus that records an image by fixing ink, toner, or the like on a recording medium such as paper or film, and in particular, an image recording apparatus and an image recording capable of performing perforation processing on the recording medium. The present invention relates to an apparatus control method.

  Image recording apparatuses such as printers, FAX machines, and copiers perform image recording by ejecting ink on a recording medium such as cut paper or roll paper (continuous paper) based on image data or fixing toner.

Some of these image recording apparatuses have a function of placing a perforation at a desired position on a recording medium as a post-processing mechanism.
For example, Patent Document 1 discloses a perforation forming apparatus that can insert perforations (lateral perforations) in the width direction at any position of a cut sheet without stopping conveyance. The perforation forming apparatus disclosed in Patent Document 1 waits at a predetermined position for a perforation blade mounted on a roller, and when the leading end position of a cut sheet is detected by a detection unit, controls to start rotation of the roller starting from that timing. To form perforations.

JP-A-6-143197

  In the case of the apparatus disclosed in Patent Document 1, every time perforation is performed on a cut sheet, the roller on which the perforation blade is mounted is started and stopped. Therefore, the drive control of the roller becomes complicated, and the roller drive unit needs to have a large power.

  Further, Patent Document 1 discloses a configuration for processing a horizontal perforation on a cut sheet, but does not disclose any processing of a perforation (longitudinal perforation) in a direction parallel to the conveyance direction of the cut sheet. .

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an image recording apparatus and a control method therefor that are capable of highly accurate vertical perforation and that have simple control and configuration.

  This image recording apparatus is an image recording apparatus that performs image recording and perforation processing on a transported recording medium based on an instruction from a host device. There was an instruction to perform perforation from the upper apparatus on the recording medium immediately below the perforation blade of the perforation machining unit, and a perforation machining unit that performs perforation in a direction parallel to the transport direction. Drives the perforation machining section to abut the recording medium with respect to the perforation machining section when a position preceding the position by a predetermined amount Xp in consideration of the mechanism error of the perforation machining section is reached. And a sewing machine blade controller for starting the operation.

  The control method of the image recording apparatus is a control method of an image recording apparatus that performs image recording and perforation processing on a transported recording medium based on an instruction from a host device, and the control method of the perforation processing unit A position immediately below the perforation blade by a predetermined amount Xp in consideration of the mechanism error of the perforation machining portion from the position instructed to perform perforation machining from the host device on the recording medium. If it is detected that the sewing machine blade has been detected, the sewing blade is in contact with the perforated portion that contacts the recording medium and perforates the recording medium in a direction parallel to the conveying direction. The driving is started so as to come into contact with the recording medium.

  It is possible to realize an image recording apparatus and a control method therefor that can perform vertical perforation with high accuracy and have simple control and configuration.

1 is a diagram illustrating an overall configuration of an image recording apparatus according to an embodiment. It is sectional drawing which shows typically the image recording device in this embodiment. It is the schematic which shows the structural example of a perforation insertion part. It is a figure explaining the timing which performs perforation insertion by the perforation insertion part in this embodiment. It is a figure explaining how to obtain | require the drive timing of the sewing machine blade in this embodiment. It is a figure explaining the case where the cam motor of a perforation insertion part is driven at the timing which set the retroactive amount to 0 msec from the perforation insertion target position. (A) is a figure which shows the position of the perforation formed when a conveyance speed is made high, and (b) is made when a conveyance speed is made low. It is a figure which shows the example at the time of starting the drive of the cam motor of a perforation insertion part by setting the retroactive amount as X100. It is a figure which shows the perforation formed when the retroactive amount is set to X100 and the drive of the cam motor of a perforation insertion part is started. FIG. 6 is a diagram illustrating a distance between a perforation insertion target position and a perforation processing start position when the perforation processing is performed while changing the recording medium conveyance speed and the retroactive time. It is the figure which plotted and plotted the value measured with the amount of retroactive as a horizontal axis and the distance between the perforation insertion target position and the start position of perforation processing as the vertical axis. It is a figure which shows the perforation processing state by this embodiment. It is a flowchart which shows the measurement control process for correction | amendment performed in order that the image recording device 1 of this embodiment may correct | amend the above-mentioned perforation process start position.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, an example in which the image recording apparatus of the present embodiment is configured as an ink jet full line printer will be described.

  Ink jet printers perform image recording at high speed and high image quality by ejecting ink droplets from a plurality of nozzles of a recording head onto a recording medium held and conveyed by a conveyance system. A full-line type ink jet printer can improve throughput by forming a line head in which a large number of recording heads are arranged in a direction perpendicular to the conveyance direction of the recording medium. This full-line type ink jet makes it possible to record a thumbtack not only on a short recording medium such as cut paper but also on a continuous recording medium such as roll paper.

In the following example, the image recording apparatus of the present embodiment shows a configuration example in which image recording and perforation processing are performed on a continuous recording medium made of a material such as paper or film.
FIG. 1 is a diagram illustrating an overall configuration of an image recording apparatus according to the present embodiment. FIG. 2 is a cross-sectional view schematically showing the image recording apparatus in the present embodiment.

  1 and 2, the image recording apparatus 1 of the present embodiment includes a recording medium feeding unit 2, a conveying unit 3, a first image recording unit 4, a second image recording unit 5, a perforation inserting unit 6, The cutting unit 8, the introduction unit 9, the recording medium discharge unit 11, the control unit 10, and the display / input / output unit 60 are configured.

  The recording medium feeding unit 2 winds a continuous roll-shaped continuous recording medium (hereinafter simply referred to as a recording medium) 2. The transport unit 3 transports the recording medium 40 in the recording medium feeding unit 2 to the recording medium discharge unit 11 at a predetermined tension and speed. The first image recording unit 4 performs image recording on the first surface (front surface) of the recording medium 40. The second image recording unit 5 performs image recording on the second surface (back surface) of the recording medium 40. The perforation insertion unit 6 performs perforation processing (longitudinal perforation) on the recording medium 40 on which the image is recorded in a direction parallel to the conveying direction. The perforation detection unit 7 is configured by a CIS (Contact Image Sensor) or the like, and is a sensor that detects a perforation formed on the recording medium 40 by a perforation insertion unit 6 described later. The perforation detection unit 7 can also be used to read an image recorded on the recording medium 40 and inspect the quality of the recorded image. The cutting unit 8 cuts the recording medium 40 that has been perforated into a predetermined length. The introduction unit 9 is disposed between the perforation insertion unit 6 and the cutting unit 8 and guides the recording medium 40 discharged from the perforation insertion unit 6 to the cutting unit 8. The recording medium discharge unit 11 stores the cut recording medium 40 and discharges it to the outside of the image recording apparatus 1. The control unit 10 controls the entire image recording apparatus 1. The display / input / output unit 60 displays and indicates the state of the image recording apparatus 1 to the user, and allows the user to set and input functions and adjustment values of the image recording apparatus 1.

  The recording medium discharge unit 11 provided behind the cutting unit 8 includes a recording medium stacker 12 for storing the recording medium 40 on which an image is recorded, and a waste medium stacker 13 for discarding unnecessary recording media 40. It is arranged. Further, switching of the recording medium 40 to be discharged to the stacker 12 or 13 is performed by the switching plate 14.

  On the other hand, the transport unit 3 includes a pair of nip rollers 20 that sandwich the recording medium 40 and transport the recording medium 40 toward the downstream side. The nip roller pair 20 is driven by a nip roller drive motor 21. The transport unit 3 includes a roller 22 that rotates following the transport of the recording medium 40, and the roller 22 includes a transport information generation unit 22 a that detects the transport amount of the recording medium 40. This conveyance information generation part 22a is comprised, for example with the encoder. Further, the transport unit 3 has a medium edge detection sensor 50 upstream of the first image recording unit 4 on the transport path. The medium edge detection sensor 50 detects the positions of both ends of the recording medium 40 and outputs the both ends position information. Since the recording medium 40 is continuous paper, the position orthogonal to the conveyance direction of the recording medium 40 may change by several millimeters depending on the processing quality. The image recording apparatus 1 acquires both end position information of the recording medium 40 from the medium end detection sensor 50, thereby correcting the image recording position and the perforation processing position with respect to the recording medium 40. The medium edge detection sensor 50 is configured by CIS, for example.

FIG. 3 is a schematic diagram showing a configuration example of the perforation insertion unit 6.
As shown in FIG. 3, the perforation insertion portion 6 includes a perforation blade lateral movement portion 41, a perforation processing portion 42, and an anvil roller 43.

  The sewing blade lateral movement unit 41 has a drive source (not shown) and operates the perforation processing unit 42 in a direction orthogonal to the conveyance direction of the recording medium 40, thereby changing the position of the sewing blade 44. It is configured as follows. The perforation processing unit 42 includes a cam motor 45 and a perforation blade 44. By driving the cam motor 45, the sewing blade 44 moves in the direction of the arrow 49, and the sewing blade 44 contacts or separates from the recording medium 40. When the perforation blade 44 comes into contact with the recording medium 40, a perforation is processed in the recording medium 40. The anvil roller 43 has a function of feeding the recording medium 40 downstream in addition to a function of a backup roller when the sewing machine blade 44 contacts the recording medium 40.

  The cutting section 8 provided downstream of the perforation insertion section 6 is disposed so as to face the recording medium 40 so as to be capable of cutting, and a cut roller 24 serving as a cut-side rotating body rotating at a constant rotational speed, and a receiving side. An anvil roller 25 as a rotating body is provided. A cutter blade 26 is provided on the outer peripheral surface of the cut roller 24, and the recording medium 40 is cut by the cutter blade 26.

  The cut roller 24 uses a cut roller drive motor 27 as a drive source. The cut roller drive motor 27 uses the conveyance information generated by the conveyance information generation unit 22a as a control pulse, and uses the conveyance speed of the recording medium 40 and the cutter blade 26. Synchronization with the peripheral speed is established.

Note that an encoder may be attached to the cut roller drive motor 27 so that the conveyance speed of the recording medium 40 and the peripheral speed of the cutter blade 26 are synchronized by this encoder signal.
The introduction unit 9 is disposed between the perforation insertion unit 6 and the cutting unit 8, and the medium conveyance tension of the introduction unit 9 holds the recording medium 40 with a tension smaller than the tension in the conveyance unit 3. A pair of cutter supply rollers 28 as a pair of introduction rotating bodies to be introduced into the cutting unit 8 is provided. The cutter supply roller pair 28 is driven by a cutter supply roller drive motor 29.

Next, the control unit 10 will be described.
As shown in FIG. 1, it has the memory | storage part 10a in a control part, the image recording control part 10b, the cutting | disconnection control part 10c, and the sewing machine blade control part 10d. These are connected in the control unit 10 by a bus (not shown). The control unit 10 is also connected to a host device 23 such as a personal computer (PC).

  The storage unit 10a stores an operation program of the image recording apparatus, temporarily stores recording data from the upper apparatus 23, perforation processing information, and the like. The storage unit 10a also stores various adjustment parameters of the image recording apparatus 1. The image recording control unit 10b averages the conveyance information of the conveyance information generation unit 22a and outputs the conveyance information of the recording medium 40 to the first image recording unit 4, the second image recording unit 5, and the cutting control unit 10c. To do. The cutting control unit 10 c issues a drive instruction to the cutting unit 8, acquires cutting position information from the blade position information generation unit 30, and outputs the cutting position information to the perforation insertion unit 6. The sewing blade control unit 10d includes a sewing blade lateral movement calculation unit and a timing generation unit (not shown). The sewing blade lateral position calculation unit calculates and obtains the lateral position for performing the perforation based on the sewing blade processing information sent from the host device 23 and the medium edge position information of the medium edge detection sensor 50, A drive instruction is given to the machine blade lateral movement unit 41. The perforation blade control unit 10d issues a drive instruction to the perforation processing unit 42 for a page on which the perforation processing is performed based on the perforation blade processing information in the job information sent from the host device 23.

  In FIG. 1, the control unit 10 is illustrated as a configuration including an image recording control unit 10 b, a cutting control unit 10 c, and a sewing machine blade control unit 10 d as hardware. However, in the present embodiment, these may be configured such that the arithmetic processing unit (not shown) in the control unit 10 executes the control program in the storage unit 10a so that these functions are realized by a software method.

  The discharge unit 11 discharges the cut recording medium 40 to the recording medium stacker 12 or the waste medium stacker 13. The cutting control unit 10c determines whether the recording medium 40 is discharged to the recording medium stacker 12 or the waste medium stacker 13, and controls the switching plate 14. The cutting control unit 10c determines whether or not a valid image is recorded on the cut recording medium 40, and the recording medium 40 on which the valid image is recorded is discarded to the recording medium stacker 12, and the other recording medium 40 is discarded. Control to discharge to the medium stacker 13 is performed.

  Next, processing operations during image recording processing and perforation processing by the image recording apparatus 1 of the present embodiment will be described. The control unit 10 receives job information for instructing image recording from the host device 23, and an image recording apparatus that implements image recording processing and perforation processing on the recording medium 40 based on the job information. Drive control for each component of 1 is performed.

  In starting the operation, it is assumed that the recording medium 40 is attached to the recording medium feeding unit 2 in a state of being wound in a roll shape as described above. It is assumed that back tension is applied to the roll-shaped recording medium 40 by a braking mechanism (not shown).

  Upon receiving the job information notification from the host apparatus 23, the control unit 10 drives the nip roller pair 20 of the transport unit 3 and transports the recording medium 40 to the first image recording unit 4 while keeping the transport speed constant. Then, the control unit 10 performs image recording processing on the first surface of the recording medium 40 by the first image recording unit 4. Then, the recording medium 40 is conveyed to the second image recording unit 5, and the control unit 10 causes the second image recording unit 5 to perform image recording processing on the second surface of the recording medium 40.

  The recording medium 40 that has undergone image recording processing by the first image recording unit 4 and the second image recording unit 5 is then subjected to perforation processing by the perforation insertion unit 6. Details of processing by the perforation insertion unit 6 will be described later.

The recording medium 40 on which the perforation processing is performed by the perforation insertion unit 6 is sent to the cutting unit 8 via the introduction unit 9 and is cut into pages.
In the image recording apparatus 1 of the present embodiment, the rotary cutting unit 8 is used as described above as a method of cutting the recording medium 40 for each page unit.

  In this cutting unit 8, the cutter blade 26 is pressed against the anvil roller 25 side by rotating the peripheral speed of the cut roller 24 with the cutter blade 26 at a constant speed synchronized with the conveyance speed of the recording medium 40, and recording is performed. The medium 40 is cut into a predetermined size.

  On the drive shaft of the cut roller 24, a blade position information generation unit 30 for detecting the position of the cutter blade 26 is provided. The blade position information generation unit 30 is constituted by, for example, an absolute encoder. When the mounting position of the cutter blade 26 is the origin position of the cutter position information generation unit 30, the length from the current cutter blade 26 position to the next cutting position is determined from the entire outer circumference of the cut roller 24 and the resolution of the absolute encoder. You can ask for it.

  The cut roller 24 and the anvil roller 25 have a larger inertia force than the nip roller pair 20 and rotate at a constant speed at a predetermined speed. The recording medium 40 is cut by being introduced between the cut roller 24 and the anvil roller 25.

Next, the perforation processing by the perforation insertion unit 6 of the image recording apparatus 1 of the present embodiment will be described.
FIG. 4 is a diagram illustrating the timing at which perforation insertion is performed by the perforation insertion unit 6 in the present embodiment.

  The perforation insertion timing on the recording medium 40, that is, the timing at which the perforation blade 44 contacts the recording medium 40 is the same as the image recording start timing position 80 that is the starting point of the timing at which the first image recording unit 4 starts the image recording process. The starting point. When the conveyance information having the number of pulses to be obtained below is output from the recording information generation unit 22a from the image recording start timing position 80, the perforation insertion unit 6 performs the perforation processing.

  Assuming that the distance from the image recording start timing position 80 to a position immediately below the sewing blade 44 is X (mm), the sewing blade 44 is brought into contact with the recording medium 40 by delaying the recording medium 40 by the distance X. Let

  When the resolution of the drum encoder of the conveyance information generation unit 22a is 300 dpi, the sewing blade control unit 10d performs the perforation processing at the timing when (X ÷ 25.4 × 300) pulses are output as conveyance information. The perforation insertion section 6 is controlled.

  In FIG. 4, the start timings Tc, Tk, Tm, and Ty of image recording processing by the C (cyan), K (black), M (magenta), and Y (yellow) recording nozzles of the first image recording unit 4 Is started with the image recording start timing position 80 as a reference. It is shown that the perforation insertion timing TM by the perforation insertion unit 6 is also started with the image recording start timing position 80 as a reference.

FIG. 4 is a diagram for explaining how to determine the drive timing of the sewing blade 44 in the present embodiment.
As shown in FIG. 4, the start timing of the perforation processing is obtained by the perforation blade control unit 10d counting the conveyance information output by the conveyance information generation unit 22a with the image recording start timing position 80 as a reference.

  The timing at which the perforation blade 44 is inserted at the position notified by the job information after the start of the perforation processing is not limited to the timing at which the perforation processing is started immediately below the perforation blade 44. 44 travel times also need to be considered. The moving time of the sewing blade 44 is the time from when the sewing blade control unit 10d issues a drive command to the cam motor 45 until the sewing blade 44 contacts the recording medium 40. As shown in FIG. 5A, the recording medium 40 is conveyed by the length Xa corresponding to the movement time, and the perforation insertion target position 90 and the actual sewing blade contact position 91 are shifted.

  For this reason, as shown in FIG. 5B, the perforation insertion timing must be determined retroactively by the movement time of the above-described perforation blade 44. For this purpose, the movement time from when the cam motor 45 is activated until the sewing blade 44 contacts the recording medium 40 is obtained. In the following, this movement time is obtained by converting into the conveyance information (encoder pulse number) output by the conveyance information generation unit 22a.

As shown in FIGS. 5A and 5B, the distance from the cutting edge of the sewing blade 44 to the recording medium contact position = A (mm), and the movement in the direction in which the tip of the sewing blade 44 contacts the recording medium 40. When the average speed = Va (mm / sec) and the conveyance speed of the recording medium 40 = Vb (mm / sec), the time required for the tip of the sewing blade 44 to contact the recording medium 44 (the number of encoder pulses) = (A ÷ Va) × (Vb ÷ 25.4 × 300)
It becomes. Therefore, the sewing machine blade drive timing in consideration of the moving time of the sewing machine blade 44 is
Sewing blade drive timing (number of encoder pulses) = (X ÷ 25.4 × 300) − (A ÷ Va) × (Vb ÷ 25.4 × 300)
It becomes.

In this equation, the value of the distance A from the cutting edge of the sewing blade 44 to the recording medium contact position 91 is a constant value, but actually there are inherent variations depending on each image recording apparatus 1.
For this reason, in order to perform precise perforation position control, an error caused by this variation must be corrected.

  In particular, when the continuous recording medium 40 is used, the perforation is shifted to the next page due to this error, and the perforation is cut by the cutter blade 26 of the cutting portion 8 as shown in FIG. This deviation cannot be tolerated. Therefore, it is necessary to obtain a correction value for correcting the variation, and to adjust an error caused by the variation by the correction value.

This adjustment method will be described with reference to FIGS.
Since the mechanical error (mechanical error) of the perforation insertion section 6 is small and difficult to measure as it is, the correction amount is obtained from the displacement of the insertion position of the perforation formed on the recording medium 40 in a state including the error. Can be considered.

The method for obtaining the correction value will be described below with reference to FIG.
In the method of FIG. 6, as shown in FIG. 6A, the perforation insertion target position 90 is used as the origin, and the difference between the perforation insertion target position 90 and the formation start position 91 of the actually formed perforation is used. The correction value is obtained.

  When the recording medium 40 is conveyed and the perforation insertion target position 90 is conveyed directly below the perforation blade 44 (perforation machining position) as shown in FIG. Is started, and the sewing machine blade 44 is started to move.

  When the cam motor 45 is driven, the sewing machine blade 44 comes into contact with the recording medium 40. The time required from the start of driving of the cam motor 45 until the sewing blade 44 contacts the recording medium 40 is the design value A (mm) of the distance between the sewing blade 44 and the recording medium 40 ± mechanism (mechanical attachment) error amount Δd ( mm) is the time required for the sewing blade 44 to move.

  In FIG. 6B, while the sewing blade 44 moves the distance of the design value A, the distance the recording medium is conveyed is Xa, and the sewing blade 44 moves the distance of the mechanism error Δd. The distance Xd by which the recording medium is conveyed is set.

  The perforation is formed at a distance Xa + Xd from the perforation insertion target position. Then, after a perforation having a predetermined length is processed, the perforation blade 44 is separated from the recording medium 40. Then, the recording medium 40 subjected to the perforation processing is transported to the cutting unit 8 as shown in FIG. 6C, and is cut for each page.

  The process of FIG. 6 is performed while changing the conveyance speed of the recording medium 40, and the deviation of the formed perforation position from the perforation insertion target position 90 is examined. FIG. 7A shows the position of the perforation 92 formed when the transport speed is increased, and FIG. 7B shows the position of the perforation 92 formed when the transport speed is decreased.

  Since the transport speed is different between FIG. 7A and FIG. 7B, the distance Xa + Xd between the formed perforation 92 and the perforation insertion target position 90 also differs. This distance includes a value Xd that depends on the mechanism error. Therefore, the distance between the start position 95 of the perforated line 92 and the perforated insertion target position 90 at the high conveyance speed in FIG. 7A and the low conveyance speed in FIG. , X2, if the values of the distances X0 and X2 are known, the perforation insertion timing in consideration of the mechanism error of the perforation insertion unit 6 is determined.

The actual drive time of the cam motor 45 is Tx, the high speed conveyance speed of the recording medium 40 in FIG. 7A is Vd1, the low speed conveyance speed of the recording medium 40 in FIG. 7B is Vd2, and the end of the recording medium 40 is perforated. Assuming the insertion target position 90, the perforation insertion position at the end of the recording medium with reference to the perforation insertion target position 90 = Tx × Vd, so X0 (mm) −X2 (mm) = Tx (sec) × (Vd1 (mm / Sec) -Vd2 (mm / sec))
The actual drive time Tx of the cam motor 45 is
Tx (sec) = (X0 (mm) −X2 (mm)) ÷ (Vd1 (mm / sec) −Vd2 (mm / sec)) (1)
Is required.

  Thus, if the distances X0 and X2 between the actual perforation start position 95 and the perforation insertion target position 90 at the time of high-speed conveyance and low-speed conveyance are obtained, the actual drive time Tx of the cam motor 45 is obtained from the above equation, The timing of perforation insertion is obtained.

  However, in reality, when trying to measure the values of the distances X0 and X2, the difference between the distances X0 and X2 is very short, and the measurement error directly affects the result as it is. For example, if the difference between the distances X0 and X2 is about 1 mm, even if the values of the distances X0 and X2 are measured with an accuracy of 0.1 mm, an error occurs on the order of 10%, which greatly affects the result. .

Therefore, it is necessary to consider a measurement method that is resistant to measurement errors.
In order to perform adjustment with high accuracy, the difference in distance between the actual perforation start position 95 and the perforation insertion target position 90 may be increased. Therefore, the difference in the position of the perforation actually inserted is made large as follows.
(1) The distance between the perforation 91 and the perforation insertion target position 90 is measured by increasing the difference in the conveyance speed of the recording medium 40 during high-speed conveyance and low-speed conveyance.
(2) At the same conveyance speed, when the perforation insertion target position 90 comes to a position directly below the perforation blade 44 as described above, and before the perforation insertion target position 90 comes to a position just below the perforation blade 44, For example, the distance between the actual perforation start position 95 formed by starting driving the cam motor 45 and the perforation insertion target position 90 is measured when it comes 100 msec ago. In the following description, when the drive of the cam motor 45 is started from a position where the perforation insertion target position 90 is before the position immediately below the perforation blade 44, the distance from the start position to the perforation insertion target position 90 is indicated on the recording medium 40. What is expressed in terms of transport time is called retroactive time. The retroactive time expressed as the number of pulses output from the conveyance information generating unit 22a is referred to as retroactive amount.

By measuring the distance between the perforation 92 and the perforation insertion target position 90 by the methods (1) and (2), the influence of the measurement error can be reduced.
FIG. 8 shows an example in which the distance between the actual perforation start position 95 and the perforation insertion target position 90 is measured by the method (2). In this example, as shown in FIG. 8A, when a position 93 X100 (mm) ahead of the perforation insertion target position 90 comes to a position directly below the perforation blade 44, the cam motor 45 of the perforation insertion section 6 is used. The example which started the drive of this drive is shown.

  In this case, as shown in FIG. 6B, the position at which the perforation blade 44 starts to contact the recording medium 40 is the mechanism error amount Δd from the expected position 94 that is Xb (mm) away from the perforation insertion target position 90. The position 95 is shifted by a distance Xd (mm).

When the recording medium 40 is further conveyed from the state shown in FIG. 8C, the recording medium 40 is eventually cut into pages by the cutter blade 26 of the cutting unit 8.
FIG. 9 is a diagram showing perforations formed on the recording medium 40 in the processing example shown in FIG.

FIG. 9A shows a perforation position when the recording medium 40 is conveyed at high speed, and FIG. 9B shows a perforation formation position when the recording medium 40 is conveyed at low speed.
9A and 9B, since the cam motor 45 is driven from a position (predetermined value) sufficiently before the perforation insertion target position 90, Xb (mm) from the perforation insertion target position 90. The sewing machine blade 44 comes into contact with the recording medium 40 at a position 95 that is deviated by a distance Xd (mm) corresponding to the mechanism error amount Δd from the predicted position 94 that is away. Since the distances Xb and Xd are shifted due to the driving time of the cam motor 45, the distance Xb and Xd are longer in FIG. 9A where the recording medium 40 is transported faster and shorter in FIG. 9B where the transportation speed of the recording medium 40 is slower.

  The perforation insertion target position 90 and the perforation processing start position under the respective conditions when the retroactive time is increased and decreased, and when the recording medium 40 is conveyed at a high speed and at a low speed. Find the distance between.

  FIG. 10 is a diagram illustrating the distance between the perforation insertion target position 90 and the perforation start position when the perforation processing is performed while changing the conveyance speed and the retroactive time of the recording medium 40.

  FIG. 10A shows a distance X0 between the perforation insertion target position 90 and the perforation processing start position when high-speed conveyance is performed and the retroactive time is shortened (0 msec). FIG. 5B shows the distance X1 between the perforation insertion target position 90 and the perforation processing start position when high-speed conveyance is performed and the retroactive time is increased (100 msec). FIG. 3C shows a distance X2 between the perforation insertion target position 90 and the perforation processing start position when low speed conveyance is performed and the retroactive time is reduced (0 msec). FIG. 4D shows the distance X3 between the perforation insertion target position 90 and the perforation processing start position when low speed conveyance is performed and the retroactive time is reduced (0 msec).

FIG. 11 is a graph in which the retroactive amount is plotted on the horizontal axis, and the distances X0 to X3 between the perforation insertion target position 90 and the perforation processing start position are plotted on the vertical axis.
The difference in the position of the perforation that is actually inserted is increased by greatly changing the transport speed and by greatly separating the two retroactive times at the same transport speed. Thereby, the influence by a measurement error can be made small.

  Accordingly, as shown in FIG. 11, at the same conveyance speed, the start position of the perforation processing based on the perforation insertion target position 90 can be expressed by a linear expression using the retroactive time as a parameter. In FIG. 11, the graph 101 at the time of high speed conveyance and the graph 102 at the time of low speed conveyance are both linear primary graphs.

  If the retroactive time from the perforation insertion target position 90 is the same as the time obtained from the time from when the cam motor 45 is started to when the perforation blade 44 and the recording medium 40 actually come into contact with each other, the conveyance speed speed is increased. Regardless, the perforation insertion position does not shift. These two times are the same at the position of the intersection point P of the two linear expressions of the graph 101 during high speed conveyance and the graph 102 during low speed conveyance in FIG.

  In the image recording apparatus 1 of the present embodiment, the retroactive amount Xp obtained from the point P is applied to the drive timing of the sewing machine blade 44 as a correction value. In other words, in the image recording apparatus 1 of the present embodiment, the perforation insertion target position 90 is faster (done back) by the correction value Xp, and the cam motor 45 of the perforation insertion unit 6 is started to be driven, so that the perforation position is accurately set. Eyes can be inserted.

FIG. 12 is a diagram illustrating a perforated state according to the present embodiment.
In the figure, the image recording apparatus 1 sets the perforation processing start position for starting the driving of the cam motor 45 of the perforation insertion section 6 to the length Xp described above from the position 95 for actually starting the perforation insertion. An upstream position 94 is assumed. When the perforation blade control unit 10d detects from the conveyance information that the position just upstream of the position 95 on the recording medium 40 by the length Xp has come to a position immediately below the perforation blade 44, the perforation insertion unit 6 starts driving. .

  Thereby, from the position in consideration of the distance Xa scheduled to be transported from the start of driving of the cam motor 45 until the sewing blade 44 contacts the recording medium 40 and the distance Xd caused by the mechanism error of the perforation insertion portion 6. Perforation insertion can begin. Therefore, perforation can be accurately performed at a desired position on the recording medium 40.

  In FIG. 12, the perforation insertion target position line 110 indicating the reference position of the perforation processing is recorded in the image recording process. However, in the normal image recording process, the perforation insertion target position line 110 is used. It is not always necessary to record on the recording medium 40.

  FIG. 13 is a flowchart showing a correction measurement control process executed for the image recording apparatus 1 of the present embodiment to correct the perforation processing start position. This process is performed as a preliminary process for adjustment performed before the actual image recording process is started.

The processing in FIG. 7 is realized by an arithmetic processing unit (not shown) in the control unit 10 executing a control program stored in the storage unit 10a.
When the process shown in FIG. 6 starts, first, the control unit 10 sets a small value t1, for example, 0 msec, as the retroactive time as step S1. Further, the speed V1 at the time of high-speed conveyance is set as the conveyance speed of the recording medium 40.

In this setting state, the control unit 10 starts an image recording process as step S2. At this time, the perforation processing by the perforation insertion section 6 is also included.
In this image recording process, the perforation insertion target position line 110 is recorded on the recording medium 40, and the perforation processing is performed using the perforation insertion target position line 110 as a reference.

  Next, as step S3, the control unit 10 measures a distance X0 between the perforation insertion start position 95 inserted into the recording medium 40 in step S2 and the perforation insertion target position line 110. This measurement is performed by obtaining the insertion start position 95 and the perforation insertion target position line 110 formed on the recording medium 40 by the perforation detection unit 7. In step S4, the control unit 10 stores the value of the distance X0 in the storage unit 10a, and stops the image recording process (step S5).

  Next, in step S6, the control unit 10 sets a value sufficiently larger than the small value t1, for example, 100 msec, as the retroactive time. Further, the speed V1 at the time of high-speed conveyance is set as the conveyance speed of the recording medium 40.

In this setting state, the control unit 10 causes the image recording apparatus 1 to start executing an image recording process including a perforation processing process as step S7.
Next, the control unit 10 determines the distance between the perforation insertion target position line 110 recorded on the recording medium 40 by the image recording process started in step S7 as step S8 and the insertion start position 95 of the perforation to be inserted. X1 is obtained from the detection result by the perforation detection unit 7. Then, after storing the distance X1 obtained in step S8 as step S9 in the storage unit 10a, the control unit 10 stops the image recording process as step S10.

Next, in step S11, the control unit 10 sets a small value t1 for the retroactive time, and sets the speed V2 for the low speed conveyance to the conveyance speed of the recording medium 40.
In this setting state, the control unit 10 causes the image recording apparatus 1 to start executing an image recording process including a perforation process in step S12.

  Then, the control unit 10 determines the distance X2 between the perforation insertion target position line 110 formed on the recording medium 40 by the image recording process started in step S12 as step S13 and the perforation insertion start position 95. It is obtained from the detection result by the detection unit 7. The control unit 10 stores the distance X2 obtained in step S13 in step S14 in the storage unit 10a, and then stops the image recording process in step S15.

Next, in step S16, the control unit 10 sets a large value t2 for the retroactive time, and sets the speed V2 for the low speed conveyance to the conveyance speed of the recording medium 40.
In this setting state, the control unit 10 causes the image recording apparatus 1 to start executing an image recording process including a perforation processing process in step S17.

  Then, the control unit 10 determines the distance X3 between the perforation insertion target position line 110 formed on the recording medium 40 by the image recording process started in step S17 as step S18 and the perforation insertion start position 95. It is obtained from the detection result by the detection unit 7. The control unit 10 stores the distance X3 obtained in step S18 as step S19 in the storage unit 10a, and then stops the image recording process as step S20.

  In this state, distances X1 to X4 between the perforation insertion target position line 110 and the perforation insertion start position 95 in the four states in which the retroactive time and the conveyance speed of the recording medium 40 are changed are recorded in the storage unit 10a. Yes.

  In step S21, the control unit 10 calculates the correction value Xp using the distances X0 to X3. The control unit 10 includes a linear expression that passes through the point (X0, t1) and the point (X1, t2) on the plane of the retroactive time and the distance between the perforation insertion target position line 110 and the perforation insertion start position 95. The intersection (Xp, 0) of the linear expression passing through the point (X2, t1) and the point (X3, t2) is obtained. The intersection value Xp is used as a correction value.

  Finally, in step S22, the control unit 10 stores the correction value Xp obtained in step S21 as a control parameter in the storage unit 10a, and ends this process. Here, the obtained correction value Xp is not directly stored in the storage unit 10a, but may be displayed on the display / input / output unit 60 to allow the user to select whether or not to store it as a parameter in the storage unit 10a. good.

  As described above, in the image recording apparatus 1 of the present embodiment, by calculating the correction value Xp described above and setting the value as a control parameter, accuracy that takes into account the mechanism error amount without requiring a large-scale configuration. High vertical perforation is possible.

  The present embodiment is not limited to the above example, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, the present embodiment can have various configurations by appropriately combining a plurality of components disclosed in the above examples. For example, the image recording apparatus of the present embodiment may delete some constituent elements from all the constituent elements shown in the above examples, or may newly combine constituent elements different from the above constituent elements. .

  In the above description, the case of a color printer is described as an example of the image recording apparatus 1 of the present embodiment. However, the image recording apparatus 1 of the present embodiment is not limited to a printer but a so-called multi-function machine including a copying machine, a scanner, and the like. There may be.

  In the above example, the recording method of the image recording apparatus 1 of the present embodiment is an example of a full-color ink jet method. However, since the present invention does not depend on the image recording method, other recording methods such as an electrostatic induction method are used. The method may be used, and the number of recording colors may be one or more.

  Further, in the above example, the case where continuous paper is used as the recording medium 40 has been described as an example, but the recording medium 40 that can be used by the image recording apparatus 1 of the present embodiment is not limited to continuous paper. It may be cut paper. The material may be other than paper, for example, a film.

DESCRIPTION OF SYMBOLS 1 Image recording device 2 Recording medium feeding part 3 Conveying part 4 1st image recording part 5 2nd image recording part 6 Perforation insertion part 7 Perforation detection part 8 Cutting part 9 Introduction part 10 Control part 10a Storage part 10b Image recording control unit 10c Cutting control unit 10d Sewing blade control unit 10e Parameter calculation unit 11 Recording medium discharge unit 12 Recording medium stacker 13 Waste medium stacker 14 Switching plate 20 Nip roller pair 21 Nip roller drive motor 22 Roller 22a Conveyance information generation unit 23 Host device Reference Signs List 24 Cut roller 25 Anvil roller 26 Cutter blade 27 Cut roller drive motor 28 Cutter supply roller pair 29 Cutter supply roller drive motor 30 Blade position information generation unit 31 Cut position 40 Recording medium 41 Sewing blade lateral movement unit 42 Perforation processing unit 43 Anvil Laura 44 Misashi Blade 45 the cam motor 50 medium edge detection sensor 60 display / input unit

Claims (10)

In an image recording apparatus that performs image recording and perforation processing on a transported recording medium based on an instruction from a host device,
A perforation processing section that abuts the perforation blade on the recording medium and applies a perforation to the recording medium in a direction parallel to the conveying direction;
The position is determined in advance in consideration of the mechanism error of the perforation processing portion from the position on the recording medium from which the upper device is instructed to perform perforation processing immediately below the perforation blade of the perforation processing portion. A sewing machine blade control unit that starts driving the perforation machining unit so that the sewing machine blade comes into contact with the recording medium when the position preceding by the amount Xp comes;
An image recording apparatus comprising: A calculation unit, and a control unit having a storage unit that stores the control program in advance;
The image recording apparatus according to claim 1, wherein the arithmetic processing unit functions as the sewing machine blade control unit by causing the control program to be executed. A transport information generating unit that outputs transport information indicating the transport speed of the recording medium;
A perforation detection unit for detecting a position of a perforation inserted in the recording medium after the perforation processing by the perforation processing unit;
A parameter storage unit for storing the predetermined amount Xp;
A parameter calculation unit that calculates the predetermined amount Xp from the conveyance information and a detection result by the perforation detection unit;
The image recording apparatus according to claim 1, further comprising:   The parameter calculation unit obtains the predetermined amount Xp using the insertion start position of the perforation inserted in the perforation processing when the recording medium is conveyed at high speed and when conveyed at low speed, The image recording apparatus according to claim 3, wherein the image recording apparatus is set in the parameter storage unit.   The parameter calculation unit is configured to start driving the perforation insertion unit by a first time before a position instructed to insert a perforation by the host device, and a second time sufficiently larger than the first time. The predetermined amount Xp is determined from the insertion start position of the perforation inserted in the perforation processing when the drive of the perforation insertion unit is started just before the time, and is set in the parameter storage unit The image recording apparatus according to claim 3. The parameter calculation unit conveys the recording medium at a high speed, and starts driving the perforation insertion unit a first time before a position instructed to insert a perforation by the host device. A linear expression obtained from an insertion start position of the perforation inserted in the perforation processing when driving of the perforation insertion unit is started a second time sufficiently larger than the first time, and the recording When the medium is transported at a low speed and the drive of the perforation insertion unit is started by the first time before the position instructed to insert the perforation by the host device, and before the second time. The predetermined amount Xp is obtained from an intersection point of a linear expression obtained from an insertion start position of a perforation inserted in the perforation machining process when driving of the perforation insertion unit is started. Item 3 The image recording apparatus according.   4. The image recording apparatus according to claim 3, wherein the perforation inspection unit reads the image in order to check the quality of the image recorded on the recording medium.   4. The display selection unit according to claim 3, further comprising a display selection unit that displays the predetermined amount Xp calculated by the parameter calculation unit and allows a user to select whether or not to store in the parameter storage unit. Image recording device. A method for controlling an image recording apparatus that performs image recording and perforation processing on a recording medium to be conveyed based on an instruction from a host apparatus,
The position is determined in advance in consideration of the mechanism error of the perforation processing portion from the position on the recording medium from which the upper device is instructed to perform perforation processing immediately below the perforation blade of the perforation processing portion. Detect that the previous position has come by the amount Xp,
When the detection is made, the perforation blade is brought into contact with the recording medium with respect to a perforation processing portion that perforates the recording medium in a direction parallel to the conveying direction. The method for controlling the image recording apparatus is characterized in that the drive is started as described above. Output conveyance information indicating the conveyance speed of the recording medium,
Detecting the position of the perforation inserted in the recording medium after the perforation processing by the perforation processing unit;
The method for controlling the image recording apparatus according to claim 9, wherein the predetermined amount Xp is calculated from the conveyance information and a detection result by the perforation detection unit.

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