JP2011079209A - Recording device and control method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device carrying out winding operation with no winding error even at the occurrence of a winding deviation caused by continuing the winding operation of a conveyed recording medium. <P>SOLUTION: The recording device carrying out printing by repeating a series of operation of recording an image on the recording medium by a printing means and conveying the recording medium to record the following image on the recording medium, and winding the conveyed recording medium into roll shape by a winding means, includes a conveyed amount acquiring means for acquiring the conveyed amount of the recording medium; a roll outer periphery acquiring means for acquiring the roll outer periphery of the recording medium wound in roll shape by the winding means; and an arithmetic means for computing the rotation amount for winding the same amount as the conveyed amount based on the roll outer periphery. The winding means is rotated by the rotation amount to wind the recording medium. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a recording apparatus and a control method for the recording apparatus.

  In a conventional recording apparatus, for example, as in Japanese Patent Application Laid-Open No. 2009-51581, there are many cases in which a recording medium conveyed is wound and used at the same time as printing. This winding device uses a separate type photosensor composed of a light-emitting part and a light-receiving part facing each other, and the light-receiving part detects light from the light-emitting part. When the recording medium is set in the recording apparatus and printing is started, the recording medium after printing is conveyed to the winding apparatus side. When the slack of the transported recording medium interrupts the optical axis of the separation type photosensor, this is detected and the motor of the winding device operates to perform a certain amount of winding operation. It will be in the state which detects light. When the slack of the recording medium conveyed again interrupts the optical axis, the recording medium is wound up to eliminate the slack. By repeating this series of operations, the conveyed recording medium can be taken up simultaneously with printing.

JP 2009-51581 A

  In the above conventional technique, if the winding operation is continued, a winding deviation occurs, and even if the conveyed recording medium is slack, the optical axis of the photosensor cannot be blocked, and the winding is not performed. There was a problem. For example, the problem will be described with reference to FIG. 6A, FIG. 6B, and FIG.

  FIG. 6A and FIG. 6B are diagrams showing a first example of the problem of the prior art, in a state in which the conveyed recording medium 4 is wound on an inner winding. Fig.6 (a) is a figure which shows the state immediately after the winding start of a prior art. FIG.6 (b) is a figure which shows the state in the middle of winding of a prior art.

  The recording apparatus 100 includes a printing unit 101 that forms an image on a recording medium 102. The printing unit 101 is an inkjet head, for example. The recording apparatus 100 receives a supply of the recording medium 102 from a paper supply side roll 104 that is a recording medium 102 wound in a roll shape. Then, a desired image is recorded by the printing unit 101. Then, the recording medium 102 on which the image is recorded is wound around the winding side roll 105.

  The winding is performed by intermittently rotating the winding side roll 105. When conveyance of the recording medium 102 proceeds while the winding-side roll 105 is stopped, the recording medium 102 has a slack portion. The photo sensor 103 is arranged to react when the slack portion reaches a predetermined amount.

  The winding-side roll 105 immediately after the start of winding shown in FIG. 6A has a small roll diameter, and when the slack portion of the recording medium 102 is lowered, the photo sensor 103 reacts to perform a predetermined amount of winding. However, the take-up roll 105 in FIG. 6B that has continued the take-up operation has a larger roll diameter, and the slack of the recording medium 102 is pushed out to the front surface of the photo sensor 103. Occurs, the optical axis cannot be blocked, and winding is not performed.

  FIG. 7 is a diagram showing a second example of the problem of the prior art, and shows a state in which the transported recording medium 102 is wound around the outer winding. The photosensor 103 of the recording apparatus 100 includes a light emitting unit and a light receiving unit. If the winding operation is continued and the winding is displaced, a displacement 106 with the photosensor 103 is generated, the optical axis cannot be blocked, and the winding is not performed.

  In addition, the reaction range of the photosensor 103 can be expanded by increasing the distance between the light emitting portion and the light receiving portion of the photosensor 103, but if the distance is long, it becomes difficult to align the optical axis. It may become the cause that becomes easy to invite.

  Also, when winding a mesh-shaped recording medium or a transparent recording medium, light may be transmitted depending on the position, and even if the slack of the recording medium blocks the optical axis, the sensor does not react and winding is performed. Sometimes it disappeared.

  The present invention performs printing by repeating a series of operations of recording an image on a recording medium by a printing unit, transporting the recording medium, and recording the next image on the recording medium, and transporting the recording medium by the winding unit. In a recording apparatus for winding a recording medium in a roll shape, a conveyance amount acquisition unit that acquires a conveyance amount of the recording medium, and a roll outer periphery that acquires a roll outer periphery of the recording medium wound in a roll shape by the winding unit An acquisition means, and a calculation means for calculating a rotation amount of the winding means for winding up the same amount as the transport amount based on the outer periphery of the roll, and the winding means is rotated by the rotation amount. And the recording medium is wound up.

  The present invention records an image on a recording medium, conveys the recording medium, repeats a series of operations for recording the next image on the recording medium, performs printing, and records the recording medium conveyed by a winding unit. A method of controlling a recording apparatus that winds up in a roll shape, the step of obtaining a roll outer periphery of the recording medium wound up in a roll shape by the winding means, and a step of obtaining a conveyance amount of the recording medium; Calculating the amount of rotation of the winding means for winding up the same amount as the transport amount based on the outer circumference of the roll, and rotating the winding means by the amount of rotation; And a step of winding up the recording apparatus.

  According to the present invention, it is possible to continue winding even when the recording medium is misaligned, and to prevent malfunction of winding of the conveyed recording medium. Further, according to the present invention, winding can be performed even with a mesh-like recording medium or a transparent recording medium.

FIG. 1 is a perspective view schematically showing a recording apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing a circuit configuration according to the embodiment of the present invention. FIG. 3 is a diagram illustrating the winding timing. FIG. 4 is a flowchart showing the operation according to the first embodiment of the present invention. FIG. 5 is a flowchart showing the operation according to the second embodiment of the present invention. Fig.6 (a) is a figure which shows the state immediately after the winding start of a prior art. FIG.6 (b) is a figure which shows the state in the middle of winding of a prior art. FIG. 7 is a diagram showing a second example of the prior art.

  Hereinafter, a recording apparatus and a control method for the recording apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

  First, the overall configuration of the recording apparatus 1 according to the present embodiment will be described with reference to FIG. Here, FIG. 1 is a perspective view showing the outline of the recording apparatus as seen from the front.

  The recording apparatus 1 includes a conveying unit 5 that conveys a recording medium 4, a printing unit 6, a platen 7, a winding unit 8, and a winding side paper tube 9 in a recording unit main body 3 disposed on a movable stand 2. .

  The transport unit 5 feeds the recording medium 4 to be printed to a predetermined printing position between the printing unit 6 and the platen 7 and discharges the recording medium 4 printed by the printing unit 6. Here, the recording medium 4 is an object to be printed by the printing unit 6 and includes, for example, paper, cloth, and a plastic sheet.

  The printing unit 6 includes a predetermined number of ink jet heads that eject ink downward, and ejects ink onto the recording medium fed by the transport unit 5. Ink is ejected from one or more nozzles corresponding to the image to be printed. A desired image is formed on the recording medium 4 by repeating the ejection of ink and the conveyance of the recording medium 4.

  The platen 7 has a long plate shape and is disposed below the printing unit 6 so that the longitudinal direction thereof is parallel to the width direction of the recording medium.

  The winding means 8 includes a winding side paper tube 9, a left side flange 10, a right side flange 11, a winding side drive motor 12, a light receiving side photosensor 13, and a light emitting side photosensor 14.

  The left side flange 10 and the right side flange 11 sandwich and fix the left and right sides of the winding side paper tube 9. The winding side paper tube 9 is rotated by the winding side drive motor 12 connected to the right flange 11.

  The light-receiving side photosensor 13 and the light-emitting side photosensor 14 are installed facing the stand 2 of the recording apparatus 1, and the light-receiving side photosensor 13 detects light emitted from the light-emitting side photosensor 14. When the slack 15 of the conveyed recording medium blocks the optical axis 16 between the light-emitting side photosensor 14 and the light-receiving side photosensor 13, the output signal of the light-receiving side photosensor 13 changes, and the control circuit 22 described later controls Thus, the winding side drive motor 12 is driven. As a result, the take-up side paper tube 9 rotates to take up the amount of the recording medium 4 controlled by the control circuit 22. When the slack 15 of the recording medium is wound up, the light receiving side photosensor 13 again detects the light emitted from the light emitting side photosensor 14. When the recording medium 4 is conveyed again and the optical axis 16 is interrupted, the recording medium 4 is wound up in an amount controlled by the control circuit 22. An operation of winding the recording medium 4 in a roll shape can be performed by repeating these series of operations.

  The outer periphery acquisition means has a roll diameter acquisition sensor 19 that measures the diameter of the winding-side roll 18 of the recording medium 4, and transmits a signal obtained from the roll diameter acquisition sensor 19 to the control circuit 22 to take up from the diameter. The outer circumference of the side roll 18 is calculated. For example, the roll diameter acquisition sensor 19 includes a light emitting unit and a light receiving unit, and there is a sensor that acquires the roll diameter by irradiating light to the end of the winding side roll 18 and detecting the reflection.

  Alternatively, the control circuit 22 receives signals from the thickness acquisition sensor 20 that measures the thickness of the recording medium 4 installed in the vicinity of the inkjet head and the roll rotation speed acquisition sensor 21 that measures the rotation speed of the take-up paper tube, The roll diameter is calculated by calculating based on the formula {(thickness of recording medium) × (number of rotations of winding side paper tube) + (diameter of winding side paper tube)}. A method of calculating the outer circumference can also be adopted. The diameter of the winding side paper tube and the calculation program are stored in the ROM in advance.

  The thickness acquisition sensor 20 is installed near the inkjet head, presses against the recording medium 4 from above, and acquires the thickness by detecting a difference from the platen 7.

  Next, a circuit configuration according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a block diagram showing a circuit configuration according to the embodiment of the present invention.

  The control circuit 22 includes a winding unit 8, a light receiving side photo sensor 13, a light emitting side photo sensor 14, a roll diameter acquisition sensor 19, a thickness acquisition sensor 20, a roll rotation number acquisition sensor 21, a printing unit 6, a transport unit 5, and a time Y. A timer 23, a ROM 24, and a RAM 25 are connected to perform processing such as calculation, control, discrimination, and setting.

  The control circuit 22 performs various controls according to a program stored in the ROM 24. The ROM 24 stores an initial setting value of the recording apparatus 1 as well as a program for controlling the entire recording apparatus 1. The RAM 25 temporarily stores a work area for calculation of the control circuit 22 and data.

  The conveying means 5 and the printing means 6 are controlled according to a program stored in the ROM 24.

  The winding unit 8 includes a motor driving unit and a winding side driving motor 12, and the motor rotation amount and the motor rotation speed are controlled by the control circuit 22.

  The light-receiving side photosensor 13 and the light-emitting side photosensor 14 detect sagging of the recording medium 4 and give a signal to the control circuit 22. Another example of a sensor that detects slack in the recording medium 4 is a contact sensor. A method may be adopted in which a contact sensor is installed at a slack allowable limit position of the recording medium 4 and reacts when the recording medium 4 comes into contact. Even if this contact sensor is used, the same effect can be obtained.

  The time Y timer 23 is controlled by the control circuit 22 and measures a time Y26 from the time when the winding means 8 performs the winding operation to the next winding. When a certain amount of winding is performed, the control circuit 22 causes the time Y timer 23 to be reset and started.

  The roll diameter acquisition sensor 19 is controlled by the control circuit 22, measures the diameter of the take-up roll 18, and gives the acquired diameter to the control circuit 22.

  The thickness acquisition sensor 20 is controlled by the control circuit 22, measures the thickness of the recording medium 4, and gives the acquired thickness to the control circuit 22.

  The roll rotation number acquisition sensor 21 is controlled by the control circuit 22, measures the number of rotations of the winding-side roll 18, and gives the acquired rotation number to the control circuit 22.

  Next, the winding timing will be described with reference to FIG. Here, FIG. 3 is a diagram showing the timing of winding, and is a diagram showing ON / OFF of the winding operation with respect to the time axis.

  The ON state in FIG. 3 is a state where the winding means 8 is ON, that is, operated. The OFF state in FIG. 3 is a state in which the winding means 8 is OFF, that is, stopped.

  The time X27 is a standard time measured in advance by an experiment and from the time when the winding means 8 performs the winding operation to the next winding. The time X27 has an allowable error range before and after. A time within 20% of the standard time is set as an allowable error.

  The time Y26 is the time from when the winding operation is actually performed by the winding means 8 to the next winding during printing, and is measured by the time Y timer 23.

  If no problem such as malfunction occurs in the winding, the time Y26 falls within the range defined by the time X27. When a problem such as a malfunction occurs in winding, the time Y26 is outside the allowable error range with respect to the time X27.

  The time T28 is a predetermined value larger than the time X27 and is stored in the ROM 24. This is the standard time from the end of winding to the end of winding when no problem such as malfunction occurs in winding. The error is calculated in advance and stored in the ROM 24 including an allowable error range. If the time Y26 exceeds this time T28, some malfunction has occurred in the winding. If the time X27 differs depending on the type of recording medium, print mode, etc., the time T28 that meets the conditions can be selected by changing the setting.

  Next, a first operation example will be described with reference to FIG. FIG. 4 is a flowchart of the operation according to the first embodiment of the present invention.

  After the winding side paper tube 9 is fixed by the left side flange 10 and the right side flange 11, the tip of the recording medium 4 discharged from the recording apparatus 1 is adhered to the winding side paper tube 9 with tape or the like, and further the winding side Wind the paper tube 9 once. Thereafter, the recording medium 4 is conveyed so that a slack 15 is formed on the recording medium 4 wound around the winding side paper tube 9.

  When printing is started in step S1, first, the thickness of the recording medium 4 is acquired by the thickness acquisition sensor 20 in step S2.

  Next, in step S <b> 3, one-pass printing is performed by ejecting ink onto the recording medium 4 by the printing unit 19.

  When one pass printing is performed in step S3, the recording medium 4 is conveyed by a predetermined amount by the conveying means 5 in step S4 in order to print the second pass.

  As the outer circumference of the winding-side roll 18 changes depending on the amount of the recording medium 4 that has been wound, the winding-side drive motor 12 that rotates the winding-side paper tube 9 necessary for winding a certain amount of winding is required. It is necessary to change the amount of rotation. Therefore, the outer periphery of the winding side roll 18 is calculated in step S5. This is done by a roll rotational speed acquisition sensor 21 that measures the thickness of the recording medium 4 acquired in step S2 and the rotational speed of the winding side paper tube 9, {(thickness of recording medium) × (the rotational speed of the winding side paper tube). ) + (Diameter of winding side paper tube)} to calculate the diameter of the roll, and to calculate based on the formula {(roll diameter) × (circumference)} The outer periphery of the winding side roll 18 is calculated. Here, the outer circumference of the winding-side roll 18 may be calculated based on the detection value of the roll diameter acquisition sensor 19.

  Next, a necessary rotation amount of the winding side drive motor 12 for winding the recording medium 3 by the same amount as the conveyed amount is calculated from the outer periphery of the winding side roll 18 calculated in step S5. The winding side drive motor 12 is rotated by the calculated rotation amount, and the recording medium 4 is wound up by the same amount as the amount conveyed in step S3 in step S6.

  In step 7, the control circuit 22 determines whether printing has been completed or continued. If printing is continued, the process proceeds to step S3, and one-pass printing is performed. When the printing is finished, the process proceeds to step 8 and the operation is finished.

  Next, a second operation example will be described with reference to FIG. Here, FIG. 5 is a flowchart of the operation according to the second embodiment of the present invention.

  After the winding side paper tube 9 is fixed by the left side flange 10 and the right side flange 11, the leading end of the recording medium 4 discharged from the recording apparatus 1 is bonded to the winding side paper tube 9 with tape or the like, and further wound once. Put on. Thereafter, the recording medium 4 is conveyed so that a slack 15 is formed on the recording medium 4 wound around the winding-side paper tube 9, and the conveyance is continued until the slack 15 of the recording medium 4 reacts with the light-receiving side photosensor 13. .

  When printing is started in step S11, the thickness of the recording medium 4 is first acquired by the thickness acquisition sensor 20 in step S12.

  Next, in step S <b> 13, one-pass printing is performed by ejecting ink onto the recording medium 4 by the printing unit 6.

  When one pass printing is performed in step S13, the recording medium 4 is transported by a predetermined amount by the transport means 5 in step S14 in order to print the second pass.

  In step S <b> 15, the control circuit 22 determines whether or not the recording medium 4 is detected by the light receiving side photosensor 13 and the light emitting side photosensor 14.

  If the recording medium 4 is detected in step S15, the outer circumference of the take-up roll 18 is calculated in step S16. This is because the rotation speed is acquired by the roll rotation speed acquisition sensor 21 for measuring the thickness of the recording medium 4 acquired in step S12 and the rotation speed of the winding side paper tube 9, and the acquired value is used to {(recording medium The diameter of the winding side roll 18 is calculated by calculating based on the formula of (thickness of) × (number of rotations of the winding side paper tube) + (diameter of the winding side paper tube)}. Further, the outer periphery of the winding-side roll 18 is calculated by calculating based on the equation {(roll diameter) × (circumference ratio)}. Here, as another example, a form in which the outer periphery of the winding-side roll 18 is calculated based on the detection value of the roll diameter acquisition sensor 19 may be used.

  Next, the rotation amount of the winding side drive motor 12 for winding the recording medium 3 by the same amount as the conveyed amount is calculated from the outer periphery of the winding side roll 18 calculated in step S16. The winding side drive motor 18 is rotated by the calculated rotation amount, and in step S17, the recording medium 4 is wound by the same amount as the amount conveyed in step S14.

  In step S18, the time Y timer 23 for measuring the time Y26 is reset and restarted. Next, the routine proceeds to step 26.

  If the recording medium 4 is not detected in step S15, the process proceeds to step S19.

  In step 19, the control circuit 22 determines whether the time Y timer 23 has been started. If no winding has been performed since the start of printing, the time Y timer 23 has not been started.

  If the time Y timer 23 has not been started in step S19, the process proceeds to step 23.

  If the time Y timer 23 is started in step S19, the process proceeds to step S20, and the time Y26 at that time is temporarily stored in the RAM 25.

  Next, in step S21, the control circuit 22 determines whether or not a winding malfunction such as winding deviation has occurred. Whether the winding malfunction has occurred is determined by comparing the time Y26 stored in the RAM 25 in step S20 with the time T by the control circuit, and whether the time Y26 is equal to or longer than the time T27, that is, {(time Y26) ≧ (time T27)}. It is done by distinguishing whether or not. The time from the completion of the standard winding where no malfunction occurs until the next winding ends, that is, the time that the photosensor 13 on the light-receiving side does not react for a time longer than the time T27, some sort of winding malfunction occurs. It is determined that it has occurred, and the process in that case is performed. Here, as another form, the time Y26 stored in the RAM 25 is compared with the time X28 including the allowable error range, and if it is within the range, it is determined that no malfunction has occurred, and if it is out of the range, the malfunction occurs. It is also possible to determine that the occurrence has occurred.

  When a malfunction such as winding deviation occurs in step S21, the outer circumference calculation of the winding side roll 18 is performed in the same manner as in step 16 in step S22. Next, the winding for winding the recording medium 3 from the outer circumference of the winding side roll 18 calculated in step S22 by the same amount as the amount conveyed, that is, the amount conveyed during the time Y26 stored in the RAM 25. The amount of rotation of the take-side drive motor 12 is calculated. In step S23, the winding-side drive motor 12 is rotated by the calculated rotation amount, and the conveyance amount is wound for the time Y26 stored in the RAM 25. The amount transported during the time Y26 stored in the RAM 25 is calculated by multiplying the transport amount for one pass transported in step 14 by the number of passes printed during the time Y26 stored in the RAM 25.

  In step S24, the control circuit 22 determines whether winding for the conveyance amount stored in step S22 is completed or not.

  In step S24, when the winding for the conveyance amount during the time Y26 stored in the RAM 25 is completed, the process proceeds to step S25.

  In step S25, the time Y timer 23 for measuring the time Y26 is reset and restarted.

  In step S26, the control circuit 22 determines whether the printing has been completed or has been continued.

  If it is determined in step S24 that winding for the conveyance amount during time Y26 stored in the RAM 25 has not been completed, the process proceeds to step S22, and winding is performed again.

  In step S <b> 26, the control circuit 22 determines whether printing has been completed or continued. When printing is continued, the process proceeds to step S13, and one-pass printing is performed. When the printing is finished, the process proceeds to step 27 and the operation is finished.

The present invention can be used in a recording apparatus such as an ink jet printer.

DESCRIPTION OF SYMBOLS 1 Recording apparatus 2 Stand 3 Recording apparatus main body 4 Recording medium 5 Conveying means 6 Printing means 7 Platen 8 Winding means 9 Winding side paper tube 10 Left side flange 11 Right side flange 12 Winding side drive motor 13 Light receiving side photosensor 14 Light emitting side Photo sensor 15 Slack 16 Optical axis 18 Winding side roll 19 Roll diameter acquisition sensor 20 Thickness acquisition sensor 21 Roll rotation speed acquisition sensor 22 Control circuit 23 Time Y timer 24 ROM
25 RAM
26 hours Y
27 hours X
28 hours T

Claims (8)

The printing unit records an image on a recording medium, conveys the recording medium, and repeats a series of operations for recording the next image on the recording medium to perform printing, and rolls the recording medium conveyed by the winding unit. In a recording device that winds up into a shape,
A conveyance amount acquisition means for acquiring a conveyance amount of the recording medium;
Roll outer periphery acquisition means for acquiring the roll outer periphery of the recording medium wound into a roll by the winding means;
Calculating means for calculating the amount of rotation of the winding means for winding up the same amount as the transport amount based on the outer circumference of the roll;
A recording apparatus, wherein the winding means is rotated by the amount of rotation to wind up the recording medium. A sensor for detecting a slack position of the conveyed recording medium;
Storage means for storing a predetermined time T longer than time X from when the winding means winds up the recording medium by a predetermined amount until the sensor detects the recording medium next;
Time measuring means for measuring time Y after winding by the winding means;
A comparison means for comparing the time T and the time Y;
The recording apparatus according to claim 1, wherein when the time Y is equal to or greater than the time T, the transport amount is a transport amount during the time Y.   The roll outer periphery acquisition unit includes a roll diameter measuring unit that measures a diameter of the roll of the recording medium, and calculates the roll outer periphery based on the diameter. Recording device.   The roll outer periphery obtaining unit includes a thickness measuring unit that measures the thickness of the recording medium, and a rotation number measuring unit that measures the rotation number of the roll of the recording medium, and the roll outer periphery is calculated from the thickness and the rotation number. The recording apparatus according to claim 1, wherein the recording apparatus calculates the following.   The recording apparatus according to claim 2, wherein the sensor is a photosensor.   The recording apparatus according to claim 2, wherein the sensor is a contact sensor. A series of operations for recording an image on a recording medium, conveying the recording medium, and recording the next image on the recording medium is repeated to perform printing, and the recording medium conveyed by the winding unit is wound into a roll. A control method of a recording apparatus to take,
Obtaining a roll outer periphery of the recording medium wound in a roll by the winding means;
Obtaining a conveyance amount of the recording medium;
Calculating the amount of rotation of the winding means for winding up the same amount as the transport amount based on the outer circumference of the roll, and
And a step of rotating the winding means by the rotation amount and winding the recording medium. Further comprising a sensor for detecting a slack position of the conveyed recording medium, and detecting a slack position of the recording medium by the sensor;
Storing a predetermined time T longer than a time X from the time when the sensor is wound by the winding means until it is detected by the sensor,
The step of acquiring the transport amount includes
A step of measuring a time Y after winding by the winding means;
Comparing the time T and the time Y;
The method for controlling a recording apparatus according to claim 7, further comprising a step of setting the transport amount to a transport amount during the time Y when the time Y is equal to or greater than the time T.

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