JPS63167989A - Bar code print inspecting device for corrugated cardboard printing machine - Google Patents

Abstract

PURPOSE:To remove a sheet with a different print before use by deciding whether or not bar code is printed without print speckles as predetermined when the bar code is printed on a corrugated cardboard sheet. CONSTITUTION:A positioning device 12 drives a motor 9 according to necessary input information to position a bar code reader 8 so that the reader 8 passes the center of the bar code as the corrugated cardboard sheet S is conveyed at a constant speed, and fixed it at the position. At bar code printing and deciding device 14 when receiving the start end detection signal of the sheet sensor 6 counts pulses from a pulse generator 13. When its counted value reaches a position set value A, the bar code is positioned right below the reader 8, which reads and inputs the bar code to the device 14. The device 14 reads the bar code in a specific area and compares it code pattern with the pattern of a reference bar code and when the comparison value is not within a permissible error range, a warning is generated and a defective sheet removing device, thereby removing the sheet S from a conveyance line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method for marking barcodes on corrugated cardboard sheets. iJI
The present invention relates to a barcode printing inspection device for a corrugated board printing machine that determines whether the printing condition of a barcode is good or bad at the stage of printing.

[Conventional technology]

In recent years, even in cardboard packaging boxes, barcodes are printed in advance on the packaging boxes to avoid the trouble of pasting a barcode stamp on the packaging box for the person using the packaging box. It is desired that the contents be loaded into the box and then sorted in a convenient manner.

[Problem that the invention attempts to solve]

However, barcodes are read by a so-called barcode league and sorted according to the type of contents in the packaging box and the difference in destination, so barcodes have small dimensional errors. Accurate marking 11 is required. Corrugated cardboard sheets have unevenness called corrugations, which may occasionally cause deviations in the width of the barcode, and especially when processing corrugated cardboard sheets to form different packaging boxes. 〢 Printing spots are likely to occur in the initial stage of printing after changing the barcode display contents due to order changes. In other words, at the initial stage of order change, the supply of ink from the inking device to the new printing plate is not constant, and the amount of ink tends to be uneven (and the barcode printed on the cardboard sheet is There is a problem that blurring or, conversely, haze occurs, and as a result, the content to be displayed in the barcode differs from the content set in advance.

Conventionally, when various types of printing, such as the product name of the contents to be packed, are printed on corrugated cardboard sheets, and barcodes are also printed at the same time when the packaging boxes are processed with crease lines or so-called ruled lines, it is difficult to print. Currently, it is not possible to determine whether a barcode is good or bad. Therefore, when a packaging box with a barcode printed on it is manufactured, the contents are sealed and sorting is decided, or when it is delivered to the market, etc., the barcode league is used to read the packaging box, and the reading value and the contents are determined. In many cases, it is discovered that there is an error in the barcode when comparing the contents (there were disadvantages such as subsequent processing such as collection and transfer of contents is cumbersome and required more steps). .

[Problem to be solved by the invention]

Therefore, in view of the above circumstances, the present invention determines whether or not the barcode is printed in a predetermined manner due to printing spots etc. at the time when the barcode is printed on the corrugated board sheet. To provide a barcode printing inspection device for a corrugated board printing machine that can eliminate barcode printing in advance before it is used as a packaging box or the like later when it differs from a predetermined one.

[Means that the invention attempts to solve]

In order to achieve the above object, the present invention includes a crotch ball that is placed behind a printing plate for printing a barcode and is conveyed at a predetermined speed, a sheet sensor that detects the leading edge of a sheet, and a sheet sensor that detects the leading edge of a sheet. a barcode reader disposed at the rear to read a barcode printed on a cardboard sheet; a moving mechanism for moving the barcode reader to a location on the cardboard sheet where the barcode is printed; and the barcode reader. A barcode printing inspection device for a corrugated board printing machine, comprising a barcode printing judgment device that compares the output value of the output value with a preset reference value and determines whether the output value is within an allowable error range. It is in.

[Effect]

In the present invention, after a barcode is printed on a corrugated cardboard sheet by the above means, the leading edge of the corrugated cardboard sheet being conveyed is first detected by a sheet sensor, and based on this detection, a barcode reader is set in advance on the corrugated cardboard sheet by a moving mechanism. The barcode reader captures the display pattern of the barcode into the barcode, and the barcode printing judgment device compares the output value of the barcode reader with the preset print pattern. Compare with the standard value to determine whether the comparison result is within the allowable error range, and eliminate those whose errors are outside the allowable range before using the corrugated sheet for making boxes, etc. It has been made possible.

〔Example〕

EMBODIMENT OF THE INVENTION Below, the Example of the barcode printing inspection apparatus in the corrugated board printing machine based on this invention is demonstrated based on drawing. 1st
In the figure, 1 to 3 are feed rolls that guide and transport a corrugated cardboard sheet S of a predetermined length and width, and 4 is a roll wrapped with a printing plate for printing various contents including barcodes. The printing cylinder 5 is a press roll for holding the corrugated cardboard sheet S between the printing cylinder 4 and the printing cylinder 4 .

A sheet sensor 6 is disposed behind the printing cylinder 4 to detect the leading edge of a corrugated cardboard sheet being conveyed at a constant speed. As shown in FIG. 2, the sheet sensor 6 is arranged above the center of conveyance where the corrugated cardboard sheet S is conveyed by the feed rolls 1 to 3. A barcode reader 8 with a moving mechanism 7 interposed therein is disposed behind the sheet sensor 6 and behind the feed roll 3. The barcode reader 8 is configured so that its built-in light receiver similarly receives natural light or the reflected light on the cardboard sheet S of a fixed light beam emitted from a built-in light emitter. The moving mechanism 7 is configured to move the barcode reader 8 in a direction perpendicular to the conveyance direction of the corrugated cardboard sheet S when the screw shaft 10 is rotated by the motor 9. The movement position of the barcode reader 8 is detected by a second pulse generator 11 that generates pulses as the screw shaft 10 rotates, and the detected value is provided to a positioning device 12 to control movement. It has become. The feed roll 3 has a first pulse generator 13 that generates pulses as it rotates and detects the feed amount of the corrugated paperboard sheet S.

The pulse signal of the first pulse generator 13 is supplied to the positioning device 12 and the barcode printing determination device 14. code 15
After moving the barcode reader 8 to the position, the operation is controlled so that the barcode reader 8 can read the barcode 15.
Direction indicating whether the scanning direction for reading the barcode 15 is the same direction as shown in FIG. 3 or perpendicularly perpendicular to the direction of scanning of the barcode 15 with respect to the position where 5 is printed and the conveyance direction of the cardboard sheet +-S as shown in FIG. 4. Furthermore, a command for the starting point Q2 of the reading scan when the camera is oriented horizontally is inputted.

On the other hand, the barcode printing determination device 14 is configured to receive an output signal from the barcode reader 8, and also receives a reference barcode to be printed on the cardboard sheet s in its code pattern. . Furthermore, the barcode printing determination device 14 instructs whether the reading scanning direction of the barcode of the corrugated cardboard sheet S to be determined is horizontal or perpendicular to the conveying direction, and the reading scanning of the barcode reader 8 in the horizontal orientation. The speed, the position of the barcode reader 8 from the second pulse generator 11, and the tolerance range of the barcode 15 of the corrugated cardboard sheet S to be judged relative to the reference barcode are inputted, and The result of the pass/fail determination of the barcode of the cardboard sheet S with respect to the reference barcode is output. The result of the pass/fail judgment output from the barcode printing judgment device 14 is received by an alarm device and issues an alarm;
Alternatively, it is provided to an existing defective sheet removing device disposed at the rear of the printing machine to remove corrugated cardboard sheets S on which defective barcodes are printed from the conveyance line.

Next, the operation of the barcode printing inspection device in the above-mentioned corrugated board printing machine will be explained based on FIG. first,
After the barcode 15 is printed on the corrugated cardboard sheet S, it is further conveyed by the feed roll 2.

This conveyance amount is detected by the first pulse generator 13 as shown in FIG. 5 T2. When the starting end of the corrugated cardboard sheet S reaches the sheet sensor 6, a detection signal is output from the sheet sensor 6 as shown in FIG. Pulses from the first pulse generator 13 are counted as shown at T3. The positioning device 12 determines the position where the barcode 15 is printed on the corrugated cardboard sheet S, the reading scanning direction of the barcode 15 printed on the corrugated cardboard sheet S, and the case where the reading scanning direction is perpendicular to the conveying direction of the corrugated cardboard sheet S. The information on the scanning starting point Q2 in is manually entered in advance.

The method of setting the position where the barcode 15 is printed on the corrugated cardboard sheet S is based on the distance C1 from the starting end in the conveying direction of the corrugated cardboard sheet S and the center of conveyance of the corrugated cardboard sheet S, that is, from the center of the width of the corrugated cardboard sheet S. distance r
It goes without saying that it can be specified based on MD, and that the position that is the base point for specifying can also be freely set.

First, as shown in Fig. 3, El]
A format in which the rllJ barcode 15 is read and scanned in the same direction as the conveyance direction of the corrugated cardboard sheet S will be explained. In this case, regardless of the input of the detection signal of the starting edge of the corrugated cardboard sheet S from the sheet sensor 6, the positioning device 12 determines that the reading scanning direction of the barcode input in advance is the same as the conveyance direction of the crotch board sheet S. The motor 9 is driven based on the information on the printing position of the barcode 15 on the corrugated cardboard sheet S, and the barcode reader 8 is operated while receiving the position signal of the barcode reader 8 from the second pulse generator 11. The barcode reader 8 is positioned so that it passes through the center of the barcode 15 as the corrugated cardboard sheet S is conveyed at a constant speed, and is fixed at that position.

On the other hand, upon receiving the starting edge detection signal from the sheet sensor 6, the barcode printing determination device 14 sets the 0 position to count the pulses from the first pulse generator 13 until the position setting value A is reached, as shown in Figure 5. The value A is calculated based on the distance between the sheet sensor 6 and the barcode reader 8, from the starting edge of the corrugated cardboard sheet S to the scanning start point Q1 of the front code 15 printed on the corrugated cardboard sheet +-S. distance a
This is the value in which C is added. When the above count value reaches the position setting value A, the barcode 15 is positioned directly below the barcode reader 8 as the corrugated sheet S is conveyed, and from this point on, the barcode reader 8 is positioned directly under the barcode reader 8 as the corrugated sheet S is conveyed. The code 15 is read and taken into the barcode printing determination device 14. Inside the barcode printing determination device 14, there is a
．． As shown at T5, information on the area, ie, length, of the barcode 15 in the reading scanning direction is input in advance, and the barcode 15 is read within this area.

Assuming that the pattern of the barcode 15 read from the corrugated cardboard sheet S is as shown in the fifth drawing 6, the barcode printing determination device 14 distinguishes between the code pattern and the fifth pattern.
It is compared with the accurate standard barcode pattern input in advance shown in Figure 7, and it is determined whether or not this comparison value is within the preset tolerance range, and if it is within the range, the 5. As shown in Figure 8, a <OK times signal is output and displayed by a lamp or the like. If the determination result is outside the range, an alarm is issued, and an existing defective sheet removal device disposed at a later stage is operated to remove the corrugated cardboard sheet S from the conveyance line.

Next, as shown in FIG. 4, a case will be described in which the reading scanning direction of the barcode 15 printed on the corrugated cardboard sheet S is perpendicular to the conveyance direction of the corrugated cardboard sheet S. In this case, when the positioning device 12 receives information that the reading scanning direction is perpendicular to the feeding direction of the corrugated cardboard sheet S, the positioning device 12 detects the starting edge of the corrugated cardboard sheet S, and then scans the bar code. Similarly to the printing determination device 14, the pulse signals of the first pulse generator 13 are counted until the position setting value A=B+C is reached. In this case, the positioning device 12 may receive the result of counting the number of pulses of the first pulse generator 13 until the position setting value AB+C is reached within the barcode printing determination device 14. When the count value reaches the position setting value A, the reading scanning start point Q2 of the barcode 15 printed on the cardboard sheet S has reached directly below the barcode reader 8. Similarly to the above, the barcode reader 8 is positioned by the positioning device 12 so as to correspond to the reading scan start point Q2 based on the information of the printing position of the barcode 15 inputted in advance. Then, when the reading start point Q2 of the barcode 15 is positioned directly below the barcode reader 8, the positioning device 12 drives the motor 9 to move the barcode reader 8 as shown in FIG. , the barcode 15 is scanned and read.In this case, since the corrugated paperboard sheet S is being conveyed at a certain speed, the trace X1 of the actual reading scan is the ideal reading scan as shown in FIG. It has an oblique angle with respect to the locus x2 of However, this error is corrected and determined by the barcode printing determination device 14.The barcode printing determination device 14 uses the count value of the pulse signal from the first pulse generator 13 as in the above case. After reaching the position setting value A, the barcode reader 8
Perform a read operation on. The barcode printing determination device 14 determines the moving speed of the barcode reader 8 during reading and scanning of the barcode 15 using the second pulse generator 1.
1, and also input the conveying speed of the corrugated paperboard sheet S from the first pulse generator 13, and from these speeds, calculate the oblique angle of the actual reading scanning trajectory X1 with respect to the above-mentioned ideal reading scanning trajectory X2. , from this oblique angle, the barcode 15 that should be read when the pattern of the barcode 15 actually read is ideally read and scanned.
This is to correct the pattern. The barcode printing determination device 14 compares the corrected pattern of the barcode 15 with a standard barcode pattern input in advance in the same manner as above, and determines whether this comparison value is within the allowable error range. Determine. After completing the reading scan, the barcode reader 8 moves back to the start point Q2 of the reading scan in order to read the barcode 15 printed on the next corrugated sheet S, and then the sheet sensor 6 moves back to the reading scan start point Q2. The above operation is repeated each time it is detected.

As another embodiment, the barcode reader 8 includes a reading laser beam generator that irradiates a reading laser beam to the barcode printed on the corrugated cardboard sheet S and scans it in the reading direction; The reading laser beam receiver receives the reading laser beam reflected from the bar code placed on the screen.

As shown in FIG. The reading laser beam receiver is positioned approximately at the center of the bar code 15, and the reading laser beam is scanned in the bar code reading scanning direction, or by using the conveying speed of the corrugated cardboard sheet S without scanning, the reading laser beam receiver is positioned approximately at the center of the bar code 15. The pattern of the barcode 15 is read by receiving the reading laser beam reflected from above, and thereafter processed in the same manner as above.Also, the barcode 15 is marked on the cardboard sheet S as shown in FIG. If the reading scanning direction of the barcode 15 is perpendicular to the conveyance direction of the corrugated cardboard sheet S, the barcode reader 8 is
The reading laser beam is scanned in the barcode reading scanning direction, and the reading laser beam receiver detects the barcode 15.
The pattern of the barcode 15 is read by receiving the reading laser beam reflected from above, and thereafter processed in the same manner as described above. The scanning speed of the reading laser beam is set to be extremely high compared to the conveying speed of the corrugated cardboard sheet S.

Further, the barcode printing determination device 14 converts the pattern of the barcode 15 read by the barcode reader 8 into a binary code of the display contents such as numerical values and codes expressed by the barcode 15, It is also possible to compare the code with a reference binary-coded display content input in advance to determine whether or not they match.

〔Effect of the invention〕

As described above, according to the KEL barcode printing inspection device for a corrugated board printing machine according to the present invention, when a barcode is printed on a corrugated board sheet, it is possible to check whether the barcode is printed in a predetermined manner due to printing irregularities or the like. When the barcode is different from the predetermined one,
This is very convenient as it can be removed before it is used as a packaging box or the like later.

[Brief explanation of the drawing]

The drawings show an embodiment of the barcode printing inspection device for a corrugated board printing machine according to the present invention, FIG. 1 is a layout diagram of a sheet sensor and a barcode reader, FIG. 2 is a configuration diagram of the barcode printing inspection device, Figure 3 is a plan view of a corrugated board sheet printed with the barcode reading and scanning direction in the same direction as the conveyance direction of the corrugated board sheet, and Figure 4 is a plan view of a corrugated board sheet printed with the barcode reading and scanning direction perpendicular to the conveyance direction of the corrugated board sheet. FIG. 5 is a plan view of a printed cardboard sheet, and FIG. 5 is a time chart showing the operation of the barcode printing inspection device. 1-3...Feed roll 4...Printing cylinder 5...
- Press roll 6... Shift sensor 7... Movement mechanism 8... Barcode reader 9... Motor 10... Screw shaft 11... Second pulse generator 12... Positioning device 13 ...First pulse generator 14...Barcode printing determination device 15...Barcode

Claims (3)

[Claims] (1) A sheet sensor that is placed behind the printing plate on which the barcode is printed and that detects the leading edge of the corrugated cardboard sheet that is transported at a predetermined speed; A barcode reader that reads barcodes, a moving mechanism that moves the barcode reader to the location on the cardboard sheet where the barcode is printed, and a comparison between the output value of the barcode reader and a preset reference value. A barcode printing inspection device for a corrugated board printing machine, comprising a barcode printing determination device for determining whether or not the barcode printing is within an allowable error range. (2) Barcode printing inspection in a corrugated board printing machine according to claim 1, wherein the output value of the barcode reader and the reference value to be compared with the output value are barcode patterns. Device. (3) The barcode reader includes a reading laser beam generator that irradiates a reading laser beam onto the barcode printed on the cardboard sheet and scans it in the reading direction, and a reading laser beam generator that irradiates the barcode printed on the cardboard sheet with a reading laser beam, and the barcode is reflected from the barcode printed on the cardboard sheet. 2. A barcode printing inspection device for a corrugated board printing machine according to claim 1, further comprising a readout laser beam receiver for receiving a readout laser beam.