JP2006205358A - Recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recorder which can correctly reprint to a rolled sheet. <P>SOLUTION: A first mark drawing means, a second mark drawing means and a gap correcting means are set in the recorder. When it is necessary to print again to the same place of a once-printed printing region of a lead-out part 18b of the rolled sheet, prior to printing of the first time, the first mark drawing means prints reference position marks 24 and 26 for the first time to the lead-out part 18b of the rolled sheet on a platen 8. Before printing of the second time, the second mark drawing means prints only reference position marks 24' and 26' for the second time to the same points as printing positions of the reference position marks 24 and 26 for the first time. The gap correcting means corrects a coordinate reference of printing data of the second time on the basis of gap amounts between the reference position marks 24 and 26 of the first time and the reference position marks 24' and 26' of the second time. Before printing of the first time, the paper is transferred forward along an X-axis direction from a roll part 18a of the rolled sheet 18 of the feeding side by an approximate length to be printed. Thereafter, the paper is transferred in the reverse direction by the amount transferred forward, and wound around the roll part 18a of the rolled sheet 18 of the feeding side. Then, printing and drawing are performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is directed to a roll paper drawer portion pulled out from a roll portion of roll paper held by a roll paper supply mechanism on a platen, and the roll paper drawer portion on the platen includes a drive roller and a pressure roller. So that the roll paper drawing portion is conveyed in the X-axis direction by the rotation of the driving roller to perform printing on the platen, and the roll paper drawing portion discharged from the platen is wound around the roll paper take-up mechanism. More specifically, the present invention relates to a recording apparatus having a function of reprinting a predetermined place in a once printed area.

In a recording apparatus, a technique is known in which a roll paper is unwound for the next drawing and printing is performed on that portion in order to adjust the paper to the surrounding environment (see, for example, Patent Document 1). In the printer, the paper is also rewound in order to return the leading edge of the paper.
JP-A-5-254293

In the recording apparatus described above, basically, printing is not performed at the same position twice, so that there is not much problem with respect to the adverse effect of the paper transport error on reprint reproducibility. However, when it is necessary to perform printing again at the same position on the paper, a reprint misalignment becomes a problem. In particular, when a wide and heavy roll paper or the like is transported to the printing unit, there is a difference in transport between the first and second time depending on the state of the roll paper at that time. Also, when the roll paper is wound around the scroller at the shipping stage and when it is pulled out from the roll unit once and wound around the roll unit, the winding force of the roll unit is different, and the conditions of the roll paper are different. Not the same. As described above, when the roll paper conditions are different, an error occurs in the first conveyance and the second conveyance of the roll paper drawing portion at the time of drawing, and accurate reprinting cannot be realized.
The present invention aims to solve the above problems.

In order to achieve the above object, according to the present invention, a roll paper drawing portion drawn from a roll portion of roll paper held by a roll paper supply mechanism is guided onto a platen, and the roll paper drawing portion on the platen is pressed with a driving roller. The roll paper is held by a grip part, and the roll paper draw-out part is conveyed in the X-axis direction by the rotation of the drive roller to print on the platen, and the roll paper draw-out part discharged from the platen is rolled up. In the recording apparatus that is wound around the mechanism, when it is necessary to perform printing again at a predetermined position in the printing area that has been printed once on the roll paper drawing portion, the printing is performed on the roll paper drawing portion before the first printing. The first mark drawing means for printing the first reference position mark and the printing position of the first reference position mark before the second printing Based on the amount of deviation between the second mark drawing means for printing only the second reference position mark at the same location and the first reference position mark and the second reference position mark, the coordinate reference of the second print data And a misalignment correcting means for correcting.
According to the present invention, the deviation amount is input to the deviation correction means from an operation panel connected to a controller.
Further, according to the present invention, the reference position mark includes two cross lines intersecting at right angles, or the cross lines, a long line in a direction perpendicular to the transport direction of the roll paper drawing portion, and a short line in the transport direction. And a rectangular mark provided.
In the present invention, the reference position mark is drawn by changing the color or line type for each drawing.
In the present invention, a roll paper resetting alignment mark is provided on the platen, and a roll paper resetting alignment mark is drawn on both sides of the roll paper drawer portion prior to the first printing. It is a thing.
Further, in the present invention, before the first printing, the paper is transported forward along the X-axis direction from the roll portion of the roll paper on the supply side by a length corresponding to the length of the printing, and then transported forward. The printing is performed after the minute portion is conveyed in the reverse direction and wound on the roll portion of the roll paper on the supply side.
In the present invention, when a deviation correction command and correction data are input to the controller during the second printing, at least the coordinate reference in the Y-axis direction of the second printing data is corrected during printing based on the correction data. Print start position correcting means is provided.
In the present invention, a paper drying area is provided in the transport path of the roll paper drawer portion so as to be positioned on the downstream side of the grip portion, and after the end of printing, the trailing edge of the print area of the roll paper drawer portion is the paper drying area The roll paper drawer portion is conveyed forward until the end of the sheet is reached.

  According to the present invention, when reprinting is performed at a predetermined position in the once printed area of the roll paper drawing portion, the amount of deviation from the reference position mark is corrected, so that accurate reprinting can be performed. In addition, the roll paper is wound forward to the supply side after the forward conveyance before printing, so there is little difference between the first and second paper conveyance conditions, and there is no error, and accurate reprinting is possible. realizable.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
In FIG. 2, reference numeral 2 denotes a large ink jet printer that prints on a large roll of paper. A leg base 6 is erected on a base 4 placed on the floor surface, and an upper part of the leg base 6. Is supported by a platen 8 with paper guides 8a and 8b extending forward and backward. A Y-axis rail 10 is installed on the upper portion of the leg base 6, and a head portion 12 on which a plurality of inkjet print heads are mounted is attached to the Y-axis rail 10 via a carriage so as to be able to reciprocate.

A pressure roller 14 is attached to the Y-axis rail 10 via a support arm so as to be movable up and down, and a sheet is formed by the pressure roller 14 and a driving roller 16 disposed immediately below a slit formed in the platen 8. The grip part is configured. Below the front guide 8a on the sheet discharge side of the platen 8, a heater 16 for drying the sheet by heat is disposed, and a drying area is configured in the sheet conveyance path. A roll paper supply mechanism (not shown) supported by the base 4 is provided on the back side of the printer, and a roll paper winding mechanism (not shown) supported by the base 4 is provided on the front side of the printer 2. Is provided.

The roll paper supply mechanism includes a scroller holding means for detachably holding a supply scroller (core body) 20 on which the roll paper 18 is mounted, and the holding means is provided via a torque limiter (not shown) capable of adjusting torque. Linked to the drive motor. The roll paper take-up mechanism includes take-up scroller holding means for detachably holding the take-up scroller 22 for taking up the roll paper, and the holding means is linked to a drive motor via a torque limiter (not shown). Yes. The head unit 12, a Y-axis drive device that drives the head unit 12 along the Y-axis rail 10, an X-axis drive device that drives the drive roller 16, a heater 16, a drive motor and a torque limiter for the roll paper supply mechanism, A drive motor, a torque limiter, and the like of the roll paper take-up mechanism are connected to a printer controller and are controlled by various programs stored in the controller.

The controller is connected to an operation panel (not shown) provided on the body of the printer 2 so that an operator can input various commands and data to the controller through the operation panel. The printer has the following functions by a program built in the controller.
(1) Reference position mark drawing function A plurality of types of reference position marks are prepared, and a registration mark (reference position mark) for matching the drawing positions of the first and second sheets is drawn. By selecting one of a plurality of types of registration mark, the color (black, cyan, magenta) of the registration mark can be changed. Here, the first and second sheets are the first drawing and the second drawing of the roll paper in reprinting. Note that the first time is the first drawing, but the second time means other than the first time. Therefore, if the paper is shifted to a level that cannot be corrected by writing the second registration mark, The third registration mark is drawn with a different color from the second one. In addition, by changing the line type (solid line, broken line, etc.) of the registration mark, it may be possible to recognize not only the color but also the line type, or a combination thereof.

Even when the registration mark mark drawing overlaps by changing the drawing color, it becomes easy to measure the amount of deviation. In addition, when the color for register mark drawing is changed, if the color changes, the print head arranged in parallel in the head part will change, but even if the print head is changed, it can be drawn from the same position from any print head. It has been adjusted.
(2) Export correction function Before printing the second print data, the operator measures the amount of misalignment of the registration mark mark using a ruler and the measured value is sent to the controller in units of 0.1 mm through the operation panel. This is a function that allows the first and second drawing start positions to be matched by inputting.

(3) Pre-feed function The roll paper take-up mechanism side winds the roll paper while feeding (front feed) the paper forward (designated by the take-up scroller) a specified distance from the supply side before drawing. The roll paper is wound around the roll paper roll portion of the roll paper supply mechanism. By unwinding the roll paper once a predetermined amount from the roll section and then tightening the roll, the winding force of the first and second sheets is stabilized, reducing the transport error due to the tension variation on the paper during printing. Can do.

(4) Feed function This is a function for conveying a sheet by designating a distance from the operation panel. In addition, you may make it convey only while pushing the button.
(5) Drying function Since the paper conveyance is finished when the drawing is completed, the paper between the drawing end point and the dryer (heater) cannot be dried. For this reason, even when drawing (printing) is completed, feeding is continued in the same manner as when drawing, and the sheet is conveyed until the drawing end point reaches the rear end C (see FIG. 2) of the dry region.

(6) Post-winding winding function This function automatically feeds back to the paper feed position at the start of drawing after drawing (printing) is finished and dried. In the case of overwriting, the first drawing result can be re-fed by refeeding the paper by manual operation on the operation panel before the second drawing, but this operation can be performed automatically. it can.

(7) Export correction function When the overwriting setting export correction is performed, but there is a slight distance deviation, the main scanning of the head unit is performed by inputting a correction signal from the operation panel to the controller during drawing. This function finely adjusts the writing position in the direction (Y-axis direction). Next, the operation of the printer according to the present invention will be described with reference to the flowchart of FIG.

  First, paper is set in the printer (step 1). In order to set the roll paper 18 in the printer 2, the pressure roller 14 is lifted from the driving roller 16, and the unused roll paper 18 mounted on the supply scroller 20 is supplied to the supply scroller holding means of the roll paper supply mechanism. The supply scroller 20 is held. The roll paper drawing portion 18b drawn from the roll portion 18a of the roll paper 18 is guided onto the platen 8, and further, the leading end thereof is applied to the take-up scroller 22 held by the take-up scroller holding means of the roll paper take-up mechanism. Lock by etc.

Next, the pressure roller 14 is lowered, and the roll paper drawing portion 18 b on the platen 8 is sandwiched between the pressure roller 14 and the driving roller 16. In this case, the leading end (1) (see FIG. 3) of the print area of the roll paper pull-out portion 18b is drawn out from the roll portion 18a of the roll paper 8 as shown in FIG. And anywhere between the print position b. When the roll paper 18 is set, the controller next determines whether or not to reprint (step 2). If reprinting is not performed, printing is performed normally (step 19).

When the printing operation is started, the head unit 12 is driven in a reciprocating direction along the Y-axis rail 10 under the control of the controller. On the other hand, the roll paper drawing portion 18b on the platen 8 is intermittently conveyed forward in the X-axis direction on the platen 8 by the intermittent rotation of the driving roller 16 counterclockwise in FIG. Printing is performed on the roll paper drawing portion 18b by ink droplets discharged from the nozzles of the 12 print heads. During plotting, the motor linked to the torque limiter of the roll paper supply mechanism stops, and the supply scroller 20 resists the torque limiter torque in the counterclockwise direction in FIG. The tension is generated in the roll paper drawing portion 18b on the supply side by the torque limiter. Further, the take-up scroller 22 is urged counterclockwise by the rotational force of the motor, and tension is generated in the roll paper drawing portion 18b on the take-up side by the rotational force of the motor via the torque limiter.

A roll portion 18a of the roll paper 18 held by the roll paper supply mechanism in accordance with the conveyance of the roll paper drawing portion 18b on the platen 8 against the supply side tension in the X-axis direction due to the rotation of the driving roller 16. Thus, the paper is pulled out against the torque of the torque limiter, and the roll paper pull-out portion 18b discharged from the grip portion is rotated by the rotational force in the winding direction of the winding scroller 22 driven by the motor via the torque limiter. It is taken up by the take-up scroller 22. When the controller determines affirmative in step 2, the controller rotates the driving roller 16 counterclockwise in FIG. 2, and the print data end position (3) shown in FIG. c) The roll paper pull-out portion 18b is conveyed (front feed) until it comes before (step 3).

During the front feed, the roll paper pulling portion 18b fed forward from the roll portion 18a of the roll paper 18 on the roll paper supply mechanism side is taken up by the take-up scroller 22 on the roll paper take-up mechanism side. . Next, the controller rotates the driving roller 16 in the clockwise direction in FIG. 2, reversely conveys (back feeds) the roll paper drawing portion 18b in the returning direction by the distance of the front feed once, and the returned roll. The paper drawer portion 18b is rewound onto the roll portion 18a of the roll paper 18 of the roll paper supply mechanism (step 4). As a result, the length of the paper for the printing to be performed will be loosened from the roll portion 18a of the roll paper 18 on the supply side once. When the paper is reversely conveyed, the motor of the roll paper take-up mechanism is stopped, and the supply scroller 20 is rotated clockwise in FIG. 2 by the motor to take up the roll paper drawing portion 18b. The take-up scroller 22 rotates in the clockwise direction against the torque of the torque limiter by the pulling force of the paper by the driving roller 16.

Next, the controller starts printing (step 5). When printing is started, the controller first prints the first reference position mark 24 and the second reference position mark 26 on the roll paper drawing portion 18b on the platen 8, as shown in FIG. (Step 6). For the reference position marks 24 and 26, a plurality of types having different colors and line types (solid line, broken line, one-dot chain line, etc.) are prepared, and a desired one can be designated in advance from the operation panel. Yes. In the present embodiment, the first reference position mark 24 employs a register mark composed of a cross line suitable for displaying the dot position of the paper, and the second reference position mark 26 detects the inclination of the paper. A rectangular mark that is long in the Y-axis direction is used.

Next, the controller prints the print data 28 in the first print area of the roll paper drawer portion 18b on the platen 8 (step 7), and ends the printing (step 8). Printing ends at the position (b) in FIG. 2, but when the sheet conveyance stops at this point, in FIG. 2, the position immediately below the head portion 12, that is, between the printing position (b) and the drying area of the heater 16. The roll paper drawer portion 18b located in the position cannot be dried. Therefore, even after the print drawing is completed, the controller performs the sheet conveyance in the same manner as when the print drawing is being performed, and the print area end (4) (see FIG. 3) of the roll paper drawing portion 18b is located after the heater 16. Continue until step (c) (see FIG. 2) is reached (step 9).

This is because the conditions until the roll paper drawing portion 18b is dried over the entire printing area are the same. Next, the controller rotates the driving roller 16 in the clockwise direction in FIG. 2, and the redrawing portion 18b reaches the print position b in FIG. Up to this point, as shown in FIG. Next, the controller again prints the first and second reference position marks 24 ′ and 26 ′ as shown in FIG.

Since the reference position marks 24 'and 26' printed at the second time are for comparison with the reference position marks 24 and 26 printed at the previous time, marks different in color and line type from the previous mark are adopted. To do. Of course, marks of the same color and the same line type may be used. After the drawing of the second reference position mark, the operator manually uses a measuring tool such as a ruler to manually operate the second reference position mark 24 with respect to the first reference position mark 24 as shown in FIG. The deviation (f) (g) of 'is measured, and the value is input to the controller from the operation panel as a correction value. The correction values (f) and (g) are specified in units of 100 microns, such as the vertical direction (X-axis direction) +57 and the horizontal direction (Y-axis direction) +42.

Since this type of printer is usually provided with an object detection sensor in the head unit 12, a method of automatically determining the deviation of the reference position mark using this sensor and inputting it to the controller is adopted. May be. If the long side of the second reference position mark 26 ′ for the second time is not inclined with respect to the second reference position mark 26 for the first time, the correction based on the XY coordinate based on the correction value, that is, the correction of the drawing start position is performed. Although it is good, as shown in FIG. 6, when it inclines more than the predetermined angle, the operator resets the paper.

The operator visually determines whether or not there is a problem in the inclination of the roll paper drawing portion 8b on the platen 8 (step 12), and when it is determined that there is a problem, resets the roll paper. (Step 17). The operator raises the pressure roller 14 once, releases the grip state of the roll paper drawing portion 18b, and resets the roll paper 18 on the platen 8. The controller returns to Step 10 when the roll paper 18 is reset. If it is determined in step 12 that there is no problem, the operator checks the amount of deviation and inputs the amount of deviation as a correction value into the memory of the controller (step 13).

Next, the controller prints print data (step 14). The operator checks the printing status during printing, and if a deviation is found in the printing status, the operator operates the operation panel during printing and inputs a print position correction command and a correction value in the Y-axis direction to the controller. To do. During printing, the controller monitors input signals from the operation panel and determines whether there is a problem with the printing position (step 15). When a correction command is input from the operation panel and it is determined that there is a problem, the controller corrects the writing position of the print data in the Y-axis direction as shown in FIG. 7 based on the print position correction program stored in the memory ( Step 18).

If this correction operation is performed during printing, the result is reflected only in printing after the correction operation is performed. Accordingly, not all of the second printing result 28 'is corrected. If there is no problem in the printing position during reprinting and no correction command is input from the operation panel, the printing operation is continued as it is, and when all printing of the second print data is completed, the printer ends printing ( Step 16).
Note that there is no problem with the tilting of the paper when there is no difference in the setting state of the roll paper when printing is performed after printing once printed without removing the roll paper.

However, if the roll paper is once removed from the grip unit or the roll paper supply mechanism, it is necessary to adjust the parallel of the roll paper drawer and roughly adjust the position in the X-axis direction when setting again. Therefore, in the present embodiment, as shown in FIG. 8, an alignment mark 30 is provided on the platen 8. The alignment mark 30 is formed by a straight line that crosses the sheet and is parallel to the Y-axis rail 10, and is separated from the printing position (b) by the head unit 12 by a predetermined distance (x) on the X-axis. Further, an alignment mark 32 that forms a pair with the first reference position mark 24 coaxially with the first reference position mark 24 when the first reference position mark 24 is drawn is drawn on the roll paper drawing portion 18b.

Thus, the first reference position mark 24 and the alignment mark 32 are drawn on both sides of the roll paper drawing portion 18b. When setting the roll paper, if the roll paper draw-out portion 18b marks 24 and 32 are aligned with the alignment mark 30 on the platen 8 side, the oblique setting of the paper can be prevented. In addition, the controller can recognize that the drawing positions of the marks 24 and 32 of the roll paper drawer portion 18b are separated from the printing position (b) by a distance (x) on the X axis.

Thus, prior to the second printing operation, the second reference position mark 24 ′ can be formed at substantially the same position as the first reference position mark 24. With respect to the printing position from the side of the roll paper drawing portion 18b, that is, the image forming position in the Y-axis direction, the edge of the side of the roll paper drawing portion 18b can be detected by an object detection sensor provided in the head portion 12. When the roll paper is reset, it is not necessary to take into account the deviation in the Y-axis direction of the roll paper drawing portion.

3 is a flowchart showing the operation of the recording apparatus according to the present invention. 1 is a side view of a recording apparatus according to the present invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention. It is explanatory drawing which shows operation | movement of the recording device based on this invention.

Explanation of symbols

2 Printer 4 Base 6 Leg base 8 Platen 10 Y-axis rail 12 Head unit 14 Pressure roller 16 Heater 18 Roll paper 20 Feeding scroller 22 Take-up scroller 24 First reference position mark 26 Second reference position mark 28 Print data 30 Alignment mark 32 Alignment mark

Claims (8)

The roll paper drawer portion pulled out from the roll portion of the roll paper held by the roll paper supply mechanism is guided onto the platen, and the roll paper drawer portion on the platen is sandwiched by a grip portion composed of a driving roller and a pressure roller, In a recording apparatus in which the roll paper drawing portion is conveyed in the X-axis direction by the rotation of a driving roller to perform printing on the platen, and the roll paper drawing portion discharged from the platen is wound on a roll paper winding mechanism. When it is necessary to perform printing again at a predetermined place in the printing area printed once in the roll paper drawing portion, the first reference position mark is printed on the roll paper drawing portion before the first printing. Before the second printing, the second reference position mark is printed at the same position as the first reference position mark printing position. Second mark drawing means for printing only, and deviation correction means for correcting the coordinate reference of the second print data based on the deviation amount between the first reference position mark and the second reference position mark. A recording apparatus characterized by that. The recording apparatus according to claim 1, wherein the shift amount is input to the shift correction unit from an operation panel connected to a controller. The reference position mark is a rectangular mark provided with two cross lines that intersect at right angles, or the cross lines, a long line in a direction perpendicular to the transport direction of the roll paper pull-out portion, and a short line in the transport direction. The recording apparatus according to claim 1, comprising: The recording apparatus according to claim 1 or 3, wherein the reference position mark is drawn by changing a color or a line type for each drawing. An alignment mark for roll paper resetting is provided on the platen, and an alignment mark for roll paper resetting is drawn on both sides of the roll paper drawer before the first printing. The recording apparatus according to claim 1. Before the first printing, the paper is transported forward along the X-axis direction from the roll portion of the roll paper on the supply side by the length approximately equivalent to the length of the printing, and then the forward transportation is reversed in the reverse direction. The recording apparatus according to claim 1, wherein the printing is performed after being conveyed and wound on a roll portion of the roll paper on the supply side. Printing start position correcting means for correcting at least the coordinate reference in the Y-axis direction of the second printing data during printing based on the correction data when a deviation correction command and correction data are input to the controller during the second printing. The recording apparatus according to claim 1, wherein the recording apparatus is provided. A paper drying area is provided in the transport path of the roll paper drawer portion so as to be positioned downstream of the grip portion, and after printing is finished, the trailing edge of the print area of the roll paper drawer portion reaches the end of the paper drying area The recording apparatus according to claim 1, wherein the roll paper drawer portion is conveyed forward.

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