JP3928585B2 - Print processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention prints an image on a long print paper as an example of a print medium, and forms a cut mark between images, and then cuts the print paper for each image before and after the cut mark as a reference. The present invention relates to a print processing apparatus in which a portion where a cut mark is formed is removed.
[0002]
[Prior art]
For example, in a print processing apparatus equipped with an ink jet printer, in order to improve print quality, it is preferable to print an image on a roll-shaped print paper via the printer and then cut the print paper for each image. .
[0003]
Therefore, in a conventional printing apparatus, for example, a cut mark is printed at the boundary between the images in addition to the image, and the cut mark is detected by a cut mark detector disposed on the upstream side of the cutting apparatus. Based on the detected position, the print paper is transported based on the finishing dimensions of the print, and after the first cutting is performed by the cutting device, the print paper is further transported by a distance corresponding to a preset cut-off dimension. Then, the second cutting is performed by the cutting device, and the portion on which the cut mark is printed is cut as a cut piece with a certain length. (See Patent Document 1)
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-79686
[Problems to be solved by the invention]
By the way, in the above processing apparatus, for example, when the distance between the cut marks is not divisible by the resolution of the pulse motor of the transport apparatus or the difference in sensitivity of the cut mark detector depends on the feed pitch of the pulse motor that drives the transport apparatus. However, periodic variations may occur in the detection of the cut mark detector. However, as in the case of a conventional print processing apparatus, this detection is based on the detection position of the cut mark detected by the cut mark detector. If the print paper is cut by the cutting device before and after the cut mark, the case where the detection is performed at a short distance and the case where the detection is performed at a short distance due to the influence of the periodic variation of the detection described above, for example, is set. If the detected distance is detected 0.2 mm earlier than the set distance, a print 0.2 mm shorter than the set dimension is finished. Tempering and, there is a problem that variations in its finished dimensions by printing.
[0006]
The present invention has been developed in view of the above circumstances, and an object of the present invention is to make the finished size of a print constant even if variations occur in detection due to detection of a cut mark by a detection means. An object of the present invention is to provide a print processing apparatus that can perform such processing.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is for forming a print mark for printing an image and a cut mark indicating a cut position reference between adjacent images on a print medium. A cut mark forming means, a cutting means for cutting the printed medium printed by the printing means, and for conveying the print medium from a printing position of the printing means toward a cutting position of the cutting means Conveying means, detection means for detecting cut marks formed on the print medium, and control means for controlling the operations of the conveying means and the cutting means based on the detection result by the detecting means Based on the detection of the cut mark by the cut mark detection means, the control means After transporting based on the finished dimensions of lint and performing the first cutting by the cutting means, the print medium is further transported by a distance corresponding to a preset cut-off dimension, and the cutting means performs the second cutting. In a print processing apparatus that performs cutting and cuts off between images on which cut marks are formed as cut-off pieces, the control means determines the finishing dimensions of the print and the cut-off dimensions of the cut-off pieces based on the print size to be printed. A first calculation function to be calculated, and a transport distance of the print medium required to the position where the cut mark is detected based on the print finish dimension and the cut-off dimension of the cut-off piece calculated by the first calculation function are calculated. 2 calculation function, transport distance of the print medium calculated by the second calculation function, and detection means The finish distance of the print calculated by the transport distance comparison function that compares the transport distance of the print medium actually calculated based on the detection of the cut mark and calculates the difference of the transport distance and the first calculation function The print medium is transported by the distance calculated based on the above, the first cutting is performed by the cutting means, and the transport distance is the transport distance of the print medium after the first cutting when performing the second cutting. A cutting operation control function for absorbing the difference in the transport distance calculated by the comparison function is provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic configuration diagram showing an embodiment of a print processing apparatus according to the present invention.
[0009]
As shown in FIG. 1, the print processing apparatus 1 includes a dot impact type printing unit 2 for printing a date or the like on the back surface of a printing paper 10 as a printing medium,
A printer 3 serving also as a print means and a cut mark forming means for printing a cut mark M indicating a cut position reference between the image N and the adjacent image N on the surface of the print paper 10;
A transport apparatus 4 provided with a plurality of transport roller pairs 40 for transporting the print paper 10;
A cut mark detector 5 as detection means for detecting the cut mark M printed on the printing paper 10 conveyed by the conveying device 4;
A cutting unit 6 as cutting means for cutting the print paper 10 conveyed by the conveying device 4 to a predetermined length;
A controller 7 is provided as a control means for controlling the driving of the printing unit 2, the printer 3, the conveying device 4, the detector 5, the cutting unit 6, and the like.
[0010]
The printer 3 is mounted with an ink jet type that ejects liquid ink from a nozzle for each dot and prints it on the printing paper 10.
[0011]
The printer 3 continuously prints a plurality of images N without providing a gap at the boundary between the images N and N under the control of the controller 7, and the cut mark M is a boundary between the images N and N. The spillover portion of each image N in the copy is set to be overwritten.
[0012]
The cut mark M has a pattern in which three white lines and two black lines are alternately arranged.
[0013]
The transport device 4 is equipped with a pulse motor 41 for rotating the transport roller pair 40, and the transport roller pair 40 is rotated and stopped by the control of the pulse motor 41 by the controller 7. In the middle of the transport device 4, a loop portion 42 for temporarily retaining the print paper 10 is provided.
[0014]
The cut mark detector 5 is disposed on the downstream side of the loop portion 42 of the transport device 4 and on the upstream side of the cutting unit 6. The cut mark detector 5 is controlled by the controller 7 on the print paper 10. Detection activity is performed over a certain range before and after the cut mark M in the transport direction (in the embodiment, from 4 mm before the cut mark M to 4 mm after the cut mark).
[0015]
The cut mark detector 5 includes a reflection type optical sensor having a light emitting element and a light receiving element. Each cut mark M is irradiated by the light emitting element, and the cut mark M is based on a change in intensity of the reflected light. To detect.
[0016]
The cutting unit 6 includes a fixed blade 61 and a movable blade 62 disposed so as to face the fixed blade 61, and the movable blade 62 is turned into the fixed blade 61 via a driving device 63 that is driven by the control of the controller 7. In contrast, the print paper P is reciprocated up and down to cut the print paper P along the width direction by the fixed blade 61 and the movable blade 62. Specifically, the cut mark detector 5 detects the cut mark M. Based on this, the controller 7 first cuts the print paper 10 conveyed by a predetermined length based on the finishing dimension of the print P, and then the print paper 10 further meets the preset cut-off dimension. After being transported by the distance, the second cut is performed, and the portion between the images on which the cut mark M is printed is cut off as a cut piece S.
[0017]
The controller 7 is constituted by a computer, and mainly controls the operations of the conveying device 4 and the cutting unit 6 based on the detection result by the cut mark detector 5. On the program of the controller 7,
A first calculation function 71 for calculating the print finishing dimension L1 and the cut-off dimension L2 of the cut-off piece S based on the print size to be printed;
A second calculation for calculating the transport distance of the print paper 10 required to reach the position where the cut mark M is detected based on the finishing dimension L1 of the print P and the cut-off dimension L2 of the cut-off piece S calculated by the first calculation function 71. Function 72;
The transport distance of the print paper 10 calculated by the second calculation function 72 is compared with the transport distance of the print paper 10 actually calculated based on the detection of the cut mark M by the cut mark detector 5, and the transport distance is compared. A transport distance comparison function 73 for calculating the difference between
When the print sheet 10 is transported by a distance calculated based on the finishing dimension L1 of the print P calculated by the first calculation function 71 and the cutting unit 6 performs the first cutting and the second cutting. A cutting operation control function 74 is constructed to absorb the difference in the transport distance calculated by the transport distance comparison function 73 in the transport distance of the print paper P after the first cutting.
[0018]
In the above processing apparatus, the distance T from the detection position of the cut mark detector 5 to the cut position of the cutting unit 6 is set to 20 mm.
[0019]
The print processing apparatus configured as described above first selects the print size desired to be printed at the start of print processing, and the first calculation function 71 of the controller 7 causes the finishing dimension L1 of the print P and the cut piece S to be changed. The cut-off dimension L2 is calculated and stored, and the second calculation function 72 detects the cut mark M based on the finishing dimension L1 of the print P and the cut-off dimension L2 of the cut-off piece S calculated by the first calculation function 71. The transport distance of the print paper 10 required to reach the position is calculated and stored.
[0020]
Thereafter, the first calculation function 71 of the controller 7 calculates the finishing dimension L1 of the print as 100 m, the cut-off dimension L2 of the cut-off piece S is 5 mm, and the print required until the position where the cut mark M is detected by the second calculation function 72. A description will be given assuming that the transport distance of the paper 10 is calculated as 82.5 mm.
[0021]
Next, in accordance with the printing process, under the control of the controller 7, while the printing paper 10 is being conveyed by the conveying device 4, first, predetermined information such as the date is printed on the back side thereof by the printing unit 2, and then the printer 3 3, a plurality of images N and a cut mark M overwritten on a spillover portion of each image N between adjacent images N are printed on the surface side, and then, via a loop portion 42. Then, it is conveyed toward the cutting unit 6.
[0022]
Then, the cut mark detector 5 searches for the cut mark M within a fixed detection range in the conveyance direction of the print paper 10, and as the cut mark detector 5 detects the cut mark M, the conveyance distance comparison is performed. Based on the conveyance distance (82.5 mm) of the print paper 10 required until the position where the cut mark M calculated by the second calculation function 72 is detected by the function 73 and the detection of the cut mark M by the cut mark detector 5. The actually calculated transport distance of the print paper 10 is compared, and the difference between the transport distances is calculated and stored, and calculated based on the finishing dimension L1 of the print P calculated by the first calculation function 71. In the embodiment, in the embodiment, the print paper 10 is first transported by 17.5 mm from the time when the cut mark is detected. First cut is made by cutting unit 6 is finish cut printed finished size of 100 mm.
[0023]
Subsequently, the conveyance distance of the print paper 10 actually calculated based on the detection of the cut mark M by the cut mark detector 5 is 82 which is the same as the conveyance distance (82.5 mm) calculated by the second calculation function 72. In the case of 5 mm, when the print paper 10 is further conveyed by 5 mm, the cutting unit 6 performs the second cut, and the cut piece S having a cut-off dimension of 5 mm is cut off.
[0024]
On the other hand, when the conveyance distance of the print paper 10 actually calculated based on the detection of the cut mark M by the cut mark detector 5 is different from the conveyance distance (82.5 mm) calculated by the second calculation function 72, for example, In the case of 82.3 mm, the cutting operation control function 74 uses the difference of 0.2 mm calculated and recorded by the transport distance comparison function 73 as the cut-off dimension of the cut-off piece S calculated by the first calculation function 71. At the stage of being absorbed by (5 mm) and transported by 5.2 mm, the cutting unit 6 performs a second cut, and the cut piece S having a cut-off dimension of 5.2 mm is cut off.
[0025]
Further, the conveyance distance of the print paper 10 actually calculated based on the detection of the cut mark M by the cut mark detector 5 is different from the conveyance distance (82.5 mm) calculated by the second calculation function 72, for example, 82. In the case of 6 mm, the cutting operation control function 74 absorbs 0.1 mm of the difference calculated and recorded by the transport distance comparison function 73 into the cut-off dimension of the cut-off piece S, and is transported by 4.9 mm. Thus, the second cut is performed by the cutting unit 6, and the cut piece S having a cut size of 4.9 mm is cut.
[0026]
Thus, in the processing apparatus described above, for example, even when there is a variation in detection by the cut mark detector 5, the print paper 10 is cut at a constant dimension (fixed length) calculated by the first calculation function 71. Therefore, the finished size of the print P is always constant, and there is no problem caused by the periodic variation of the detection of the cut mark detector 5 when the print process is performed.
[0027]
In the above embodiment, the cut mark detector 5 equipped with the reflection type optical sensor is used. However, the present invention is not limited to this.
[0028]
In the above embodiment, an ink jet type printer is used. However, the present invention is not limited to this. For example, a method of ejecting ink from a nozzle using a piezoelectric element may be used. A printer may be used in which photosensitive paper is used as the print medium, and after the image is printed on the photosensitive paper, the photosensitive paper is developed.
[0029]
In the above embodiment, the cut mark M is printed in a line on the surface of the print paper 10 by the printer 3, but the present invention is not limited to this. For example, a punching device is separately provided as a cut mark forming unit. The through hole may be formed in the printing paper 10 by using this punching device, and the through hole may be used as the cut mark M.
[0030]
【The invention's effect】
As described above, according to the present invention, the control means for controlling the operations of the conveying means and the cutting means based on the detection result by the detecting means can be used to determine the print finishing dimensions and the cut-off pieces based on the print size to be printed. The first calculation function for calculating the cut-off dimension, and the transport distance of the print medium required to the position where the cut mark is detected based on the print finishing dimension and the cut-off size of the cut-off piece calculated by the first calculation function. The second calculation function to be calculated is compared with the conveyance distance of the print medium calculated by the second calculation function and the conveyance distance of the print medium actually calculated based on the detection of the cut mark by the detection unit. Based on the finishing dimensions of the print calculated by the transport distance comparison function for calculating the difference in transport distance and the first calculation function The print medium is transported by the distance to be ejected, and the first cutting is performed by the cutting means, and the transport distance of the print medium after the first cutting when performing the second cutting is calculated by the transport distance comparison function. By providing a cutting operation control function that absorbs the difference in the transported distance, for example, even when there is periodic variation in detection by the detecting means, the cut length of the print medium by the cutting means is aligned and printed. In addition, there is no inconvenience due to periodic variations in the detection of the cut mark detector, for example, when the print processing is performed.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an embodiment of a print processing apparatus according to the present invention.
FIG. 2 is a configuration diagram.
FIG. 3 is an explanatory diagram of print paper that has been subjected to print processing.
[Explanation of symbols]
1 Print processing device 3 Printer (printing means / cut mark detecting means)
4 Conveying device (conveying means)
5 Cut mark detector (detection means)
6 Cutting unit (cutting means)
7 Controller (control means)
71 First calculation function 72 Second calculation function 73 Transport distance comparison function 74 Cutting operation control function P Print paper (printed medium)
N Image M Cut mark S Cut piece

Claims (1)

Print means for printing an image on a print medium, cut mark formation means for forming a cut mark indicating a cut position reference between adjacent images, and the print medium printed by the print means A cutting means for cutting, a conveying means for conveying the print medium from a printing position of the printing means toward a cutting position of the cutting means, and a cut mark formed on the print medium. And a control means for controlling the operation of the conveying means and the cutting means based on the detection result by the detection means, and based on the detection of the cut mark by the cut mark detection means, The control means conveys the print medium based on the finishing dimensions of the print, and sends it to the cutting means. After the first cutting is performed, the print medium is further transported by a distance corresponding to a preset cut-off dimension, the second cutting is performed by the cutting means, and the image between the cut marks is cut off. In a print processing device that is cut off as a piece,
Control means include
A first calculation function for calculating a print finish size and a cut-off size of a cut-off piece based on a print size to be printed;
A second calculation function for calculating the transport distance of the print medium required to reach the position where the cut mark is detected based on the print finishing dimension and the cut-off dimension of the cut-off piece calculated by the first calculation function;
The transport distance of the print medium calculated by the second calculation function is compared with the transport distance of the print medium actually calculated based on the detection of the cut mark by the detection unit, and the difference in the transport distance is calculated. A transport distance comparison function,
The print medium is transported by a distance calculated based on the finishing dimensions of the print calculated by the first calculation function, the first cutting is performed by the cutting unit, and the first cutting is performed when the second cutting is performed. A print processing apparatus, comprising: a cutting operation control function for absorbing a difference in transport distance calculated by a transport distance comparison function in a transport distance of a print medium after cutting.

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