JP5479998B2 - Device for identifying defective surface blanks in blanking lines - Google Patents

Description

  The present invention relates to a surface defective blank in a blanking line that cuts a continuous sheet that has been subjected to a predetermined processing into each break in a continuous area of a constant length into a sheet-like blank in the area in each break. The present invention relates to an identification device.

  A continuous sheet of paper or plastic film or the like that has been subjected to predetermined processing such as printing, creasing, partial punching, etc. within each break of a continuous area of a certain length is a box, The blanking line provided with a blanking section that cuts into a sheet-like blank used for a carton, a cover, etc. is the length of a continuous sheet that is continuously supplied and the length of a continuous sheet that is intermittently fed into the blanking section. An accumulation unit is provided on the upstream side of the blanking unit so that the difference between the two can be allowed to vary with time.

  It should be noted that the breaks in the region of a certain length of such a continuous sheet are displayed with a break mark by printing or the like, and there is no display by such a break mark, and a predetermined processing pattern such as a print pattern is present. Some are determined by repeated pitches. In addition, when cutting into blanks in the regions within each break of these continuous sheets, when leaving a chip portion at at least one of the front end, the rear end, and the width direction end of the region within each break In some cases, the entire region within each break is cut into blanks without leaving such a chip portion. Blanks may be cut into a plurality of rows in the width direction of the area in each break.

  The continuous sheet subjected to the above-described printing, crease line insertion, partial punching, etc. may have surface defects such as printing defects, crease line defects, partial punching defects and surface contamination, and blanking parts. Blanks that include such a defective surface after cutting are excluded as defective surface blanks. Identifying a defective surface blank from each sheet-shaped blank after being cut in this manner requires a great deal of labor and is likely to be overlooked.

  An inspection device that inspects the surface state of the continuous sheet upstream of the accumulation portion of the blanking line so that the problem of such a problem can be accurately identified without taking time and effort. And in order to provide a defect identification mark applying device for applying a defect identification mark by labeling or marking within the boundary of the region of the continuous sheet where surface defects are detected by this inspection device, on the downstream side of the blanking part, A device for detecting surface defect blanks in a blanking line is proposed in which a sensor for detecting a defect identification mark is provided, and a blank detected by the sensor is detected as a surface defect blank. (For example, refer to Patent Document 1).

Japanese Patent No. 3411544

  The apparatus for eliminating a surface defect blank in the blanking line described in Patent Document 1 performs a surface condition inspection in a continuous sheet state in which surface defects can be easily detected, and from the inspection position of the inspection apparatus to the blanking section entrance. Even if the continuous sheet cutting waiting length varies due to the accumulation of the accumulating part, by attaching a defect identification mark by labeling or marking within the break of the area where the surface defective part detected by the inspection apparatus exists The defective surface blank can be accurately identified from the cut sheet-shaped blanks, but there is a problem that extra running cost is required because a label for sticking and ink for marking are required. In addition, when affixing a label, the label may peel off while the continuous sheet is running or cut, and there is a risk that extra trouble will occur, such as being mixed into the conveying device or cutting device as a foreign object, or adhering to the subsequent continuous sheet. is there. When marking with ink, there is a risk that the ink adheres to the conveying device or the cutting device, and an extra problem that stains the subsequent continuous sheet may occur.

  Accordingly, an object of the present invention is to enable accurate identification of a surface defect blank without causing an excessive problem at a low running cost.

  In order to solve the above-described problem, the present invention provides a continuous sheet that is continuously supplied and has been subjected to predetermined processing in each break of a continuous area of a certain length, and a region in each of the breaks. A blanking section for cutting into blanks is provided, an accumulation section for the continuous sheet supplied continuously is provided on the upstream side of the blanking section, and an upstream side of the continuous sheet is provided on the upstream side of the accumulation section. In the identification device for a defective surface blank in a blanking line provided with an inspection device for inspecting the surface state, the accumulation length of the continuous sheet in the accumulation portion is constant at each blank cutting time in the blanking portion. The length of the continuous sheet is cut from the inspection position of the inspection apparatus at each cutting point to the cutting edge at the end of the blanking section. The waiting length is set to a predetermined length, and an integer value N excluding the decimal part of the value obtained by dividing the predetermined cutting waiting length by a certain length of the area between the breaks is obtained in advance. Provided means for recognizing a break of the continuous sheet at the inspection position, and when a defective surface is detected on the continuous sheet passing through the inspection position, immediately after the break is recognized at the inspection position At the time when the signal having the surface defect portion is output, the counting of the number of blank cuttings at the blanking portion is started, and the counted number of cutting times is A configuration was adopted in which a blank cut when it was equal to the integer value N determined in advance was identified as a surface defect blank including a surface defect portion detected at the inspection position.

  That is, the accumulation length of the continuous sheet in the accumulation portion is adjusted to a certain length at each blank cutting time in the blanking portion, and the blanking portion is adjusted from the inspection position of the inspection device at each cutting time. The fractional part of the value obtained by dividing the cut waiting length of the continuous sheet up to the cutting edge at the entrance to a predetermined length and dividing this predetermined cutting wait length by a certain length of the area between the breaks An integer value N excluding the above is obtained in advance, and a means for recognizing the break of the continuous sheet at the inspection position is provided, and when a defective surface portion is detected in the continuous sheet passing through the inspection position, the break When the surface is recognized at the inspection position, a signal with a defective surface is output, and from the point in time when the signal with a defective surface is output, the blanking section starts counting the number of blanks. Counted By identifying the blank cut when the number of cuts equal to the integer value N obtained in advance as a defective surface blank including a defective surface detected at the inspection position, an extra inconvenience can be obtained at a low running cost. It was made possible to accurately identify defective blanks without causing them.

  On the upstream side of the blanking line, a predetermined printing process for one time is applied to an area of a certain length of the continuous sheet corresponding to the circumference of the plate cylinder by one rotation of the plate cylinder. A printing device for forming a delimiter of the region of the predetermined length on a continuous sheet by printing, a sensor for detecting a start timing of one rotation of the plate cylinder for performing the printing for one time, and a position of the inspection position A pulse generator for measuring a feed length of the continuous sheet from the printing apparatus on the upstream side, and each time the sensor detects the start timing, a pulse count of the pulse generator is provided. When the pulse generator outputs the number of pulses after the pulse count is cleared, the break of the continuous sheet is placed at the inspection position. And when the pulse generator outputs the pre-determined second pulse, it recognizes that the continuous sheet break is at the inspection position. Even if the separator mark to be displayed is not printed, the separator can be recognized at the inspection position, and when the separator is recognized at the inspection position, a signal with a defective surface is output without causing a time delay. be able to. In other words, for example, when a break mark or the like is detected by an inspection device and a break is recognized at an inspection position, the inspection device detects the break mark or the like and then outputs a signal with a defective surface. A time delay for signal processing will occur. Although the time delay due to this signal processing is slight, when a continuous sheet is continuously supplied at a high speed, there is a possibility that a signal delay with a defective surface may be a problem.

  The apparatus for identifying a defective surface blank in the blanking line according to the present invention adjusts the accumulation length of the continuous sheet in the accumulation portion to a certain length at each blank cutting time in the blanking portion. The cutting waiting length of the continuous sheet from the inspection position of the inspection apparatus at the time of cutting to the cutting edge at the entrance of the blanking section is set to a predetermined length, and this predetermined cutting waiting length is set as the break An integer value N excluding the fractional part of the value divided by a certain length of the area between them is obtained in advance, and means for recognizing the break of the continuous sheet at the inspection position is provided. When a defective portion is detected, a signal with a surface defective portion is output immediately after the break is recognized at the inspection position, and a blanking portion is output from the time when the signal with the surface defective portion is output. The surface defect including the surface defect portion detected at the inspection position is started by counting the number of times the blank is cut, and the blank cut when the counted number of times of cutting becomes equal to the integer value N determined in advance. Since it is identified as a blank, it is possible to accurately identify a defective blank without causing an excessive problem at a low running cost.

The schematic front view which shows the blanking line which employ | adopted the surface defect blank identification device which concerns on this invention Front view showing the upstream portion of the blanking line of FIG. FIG. 2 is a front view for explaining the length of waiting for cutting a continuous sheet at the time of cutting in the blanking portion of FIG. Front view showing a downstream portion of the blanking line of FIG. A control flowchart showing a procedure for identifying a surface defect blank by the controller of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a blanking line provided with an apparatus for identifying a defective surface blank according to the present invention. In the blanking line, a printing device including a plurality of stages of printing machines 1 that perform printing on the surface of the continuous sheet A is arranged on the upstream side, and one rotation of the plate cylinder 1a of each printing machine 1 corresponds to one time. A predetermined printing pattern is printed in a region of a certain length S corresponding to the circumferential length of the plate cylinder 1a by this one printing process, and a continuous region of a certain length S The continuous sheet A is cut into blanks B as will be described later. The continuous sheet A subjected to the printing process is wound around three feed rollers 2 and continuously supplied to the blanking line. Although not shown, the last-stage printing press 1 is provided with a sensor for detecting the start timing of one rotation in which the plate cylinder 1a performs a predetermined printing process for one time. A pulse generator 3 for measuring the feeding length of the continuous sheet A is attached.

  The blanking line is formed by causing the flat plate-shaped cutting member and the anvil member, which are opposed to each other in the vertical direction, to approach and separate from each other in the vertical direction, thereby stopping the continuous sheet A that has been temporarily stopped on each of the predetermined printing patterns. A blanking section 4 for cutting into a sheet-like blank B is provided in the area within the break, and an accumulating section 5 for a continuous sheet A continuously supplied from the printing apparatus is provided on the upstream side immediately before the blanking section 4. Yes. In addition, even if the blanking part 4 leaves a chip part in at least any one of the front end part, rear end part, and width direction end part of the area | region in each division of the continuous sheet A, such a chip part The entire area within each break may be cut into blanks without leaving a left.

  A camera 6 as an inspection device for inspecting the surface state of the continuous sheet A is provided on the upstream side of the accumulation unit 5. The camera 6 is a one-dimensional CCD camera that operates the continuous sheet A that is traveling in the width direction, and the one-dimensional captured image is image-processed into a two-dimensional image by an image processing device built in the controller 7. The image is compared with a pre-stored reference image, and the quality of the surface state is inspected.

  A sensor 8 for detecting the tip of the blank B discharged from the blanking section 4 is provided at the outlet of the blanking section 4, and on the downstream side thereof, a conveyor 9 that conveys the formed blank B to the discharge end. Is provided in the middle of the conveyor 9, and a rejection device 10 for eliminating the defective surface blank BF is provided. As will be described later, the controller 7 is also used to control the identification and elimination of the defective blank BF. In addition to the image signal of the camera 6, the controller 7 outputs a pulse of the pulse generator 3, a cutting signal from the blanking unit 4, The tip detection signal of the sensor 8 is also input, and the exclusion device 10 is activated.

  As shown in FIG. 2, the accumulating section 5 adjusts the accumulating length by moving the looper roller 11 around which the continuous sheet A is wound up and down. In accordance with the intermittent cutting timing of the blank B, the continuous sheet A that has been accumulated is fed to the blanking section 4 by a certain length S of the area between the breaks where a predetermined printed pattern is printed. A belt wrapper roller 12 is provided for intermittent feeding. When the bell trapper roller 12 is stopped, the looper roller 11 descends to increase the accumulation length of the continuous sheet A as shown by the one-dot chain line in the figure, and the belt wrapper roller 12 is driven to accumulate. When the continuous sheet A is fed into the blanking section 4, the looper roller 11 rises and the accumulation length decreases as shown by the solid line.

  As shown in FIG. 3, the continuous sheet A fed to the blanking section 4 by the belt wrapper roller 12 is accumulated at the accumulation section 5 at each cutting time of the blank B at the blanking section 4 after feeding. The looper roller 11 is raised to a certain position so that the rate length becomes a certain length. Therefore, at each cutting time, the cutting waiting length L of the continuous sheet A from the inspection position of the camera 6 as the inspection device to the cutting edge at the entrance of the blanking unit 4 is set to a certain predetermined length. Is done.

  As shown in FIG. 4, the conveyor 9 holds the blank B intermittently discharged from the blanking portion 4 between the lower belts 9b and 9c divided into the upstream side and the downstream side so as to face the upper belt 9a. And transport it. Further, the reject device 10 for the surface defect blank BF includes an arm 15 rotated up and down by a cylinder 14 at an inlet of a guide plate 13 provided between the lower belt 9b on the upstream side and the lower belt 9c on the downstream side. A pressing roller 16 attached to the tip is provided, and the conveyed surface defect blank BF is guided between the pressing belt 17 on the lower side of the guide plate 13 and the lower belt 9b by the pressing roller 16, and is moved downward. To the removal conveyor 18. The blank B having a good surface state passes through the upper side of the guide plate 13, is sandwiched between the upper belt 9a and the lower belt 9c on the downstream side, and is conveyed to the discharge end.

  FIG. 5 is a control flowchart showing a procedure for identifying the defective surface blank BF by the controller 7. The controller 7 has a predetermined length S of the area between the breaks of the continuous sheet A on which the predetermined printing pattern is printed and a predetermined cutting of the continuous sheet A at each cutting time of the blank B of the blanking unit 4. The waiting length L is input, and an integer value N obtained by excluding the decimal part of the value obtained by dividing the cutting waiting length L by the fixed length S is obtained in advance. Each time a detection output is output from a sensor that detects the start timing of one rotation of the plate cylinder 1a, the pulse count number of the pulse generator 3 is cleared to zero. After the clear, when the pulse generator 3 outputs the number of pulses, it is also determined in advance whether the break of the continuous sheet A in the area where the predetermined print pattern is printed is at the inspection position of the camera 6. In this example of control, when the pulse generator 3 outputs the i-th pulse, it is required that the break of the continuous sheet A is at the inspection position of the camera 6. Therefore, the separators of the continuous sheet A are formed in a predetermined printed pattern area that is repeatedly printed every rotation of the plate cylinder 1a, and the continuous sheet A is continuous even if the separator marks for displaying the separators are not particularly printed. The separation of the sheet A can be recognized at the inspection position.

  When the camera 6 detects a defective surface portion on the continuous sheet A, and immediately after the i-th pulse is output from the pulse generator 3, the controller 7 checks the camera 6 for the break of the continuous sheet A. Recognize that it is in the position, and output a signal with a defective surface. Thereafter, when a cutting signal is output from the blanking unit 4, the blanking unit 4 starts counting the number of times of cutting j of the blank B, and the counted number of times of cutting j is equal to the integer value N obtained in advance. When this happens, the blank B discharged immediately after this from the blanking portion 4 and having its tip detected by the sensor 8 at the exit is identified as a defective surface blank BF including the defective surface portion detected by the camera 6.

  The controller 7 can count a plurality of cutting times j at the same time, and when a defective surface portion is detected between a plurality of breaks, the number of cutting times for the defective surface portion detected between the cuts. j is counted independently, and when the counted number of times of cutting j becomes equal to the integer value N, the blank B discharged from the blanking section 4 immediately after that is identified as a surface defect blank BF.

  The controller 7 is also supplied with the conveyance speed V of the conveyor 9 and the distance D from the leading edge detection position of the blank B by the sensor 8 to the entrance of the guide plate 13 of the exclusion device 10. The controller 7 calculates the time T (= D / V) until the surface defect blank BF whose tip is detected by the sensor 8 arrives at the entrance of the guide plate 13 from the transport speed V and the distance D, and reaches it. In synchronization with the timing, the arm 15 of the pressing roller 16 of the rejecting device 10 is rotated downward to reject the surface defect blank BF to the rejecting conveyor 18.

  In the embodiment described above, every time a detection output is output from the sensor that detects the start timing of one rotation of the plate cylinder, the pulse count number of the pulse generator that measures the feed length of the continuous sheet is cleared, and this pulse count After clearing the number, when the pulse generator outputs the number of pulses, it is determined in advance whether the continuous sheet break is at the inspection position of the inspection device, and when the pulse generator outputs the i-th pulse, Recognize that the continuous sheet break is at the inspection position, but the continuous sheet is provided with a break mark for displaying the break, and these break marks are detected by the inspection device to separate the continuous sheet breaks. It is also possible to recognize that the eye is at the examination position.

  Further, in the above-described embodiment, the continuous sheet is printed in each break of the fixed length region. However, the continuous sheet is a crease line in each break of the fixed length region. Other processing such as partial punching processing such as pouring processing and punching processing and coating processing may be performed.

  Furthermore, in the above-described embodiment, the accumulation portion is adjusted so that the looper roller moves up and down to adjust the accumulation length. However, the accumulation portion can be configured such that the looper roller moves in a horizontal direction or an arc locus. It is good also as what moves along.

A Continuous sheet B Blank BF Surface defect blank 1 Printing machine 1a Plate cylinder 2 Feed roller 3 Pulse generator 4 Blanking section 5 Accumulating section 6 Camera 7 Controller 8 Sensor 9 Conveyor 9a, 9b, 9c Belt 10 Exclusion device 11 Looper roller 12 Belt Trumpet roller 13 Guide plate 14 Cylinder 15 Arm 16 Pressing roller 17 Pressing belt 18 Exclusion conveyor

Claims (2)

  A blanking section is provided that continuously feeds a continuous sheet that has been subjected to predetermined processing in each break of a continuous area of a certain length, and cuts the sheet into a blank in the area of each break. A blanking line provided with an accumulation unit for the continuously supplied continuous sheet on the upstream side of the blanking unit, and an inspection device for inspecting the surface state of the continuous sheet on the upstream side of the accumulation unit In the apparatus for identifying a defective surface blank in the above, the accumulation length of the continuous sheet in the accumulation portion is adjusted to a constant length at each cutting time of the blank in the blanking portion, The continuous sheet cutting waiting length from the inspection position of the inspection device to the cutting edge at the entrance of the blanking section is set to a predetermined length. Means for recognizing a boundary of the continuous sheet at the inspection position by previously obtaining an integer value N excluding a decimal part of a value obtained by dividing a predetermined cutting waiting length by a certain length of the area between the boundaries When a defective surface portion is detected in the continuous sheet passing through the inspection position, a signal indicating that there is a defective surface is output immediately after the break is recognized at the inspection position. From the time when a partial signal is output, the blanking section starts counting at the blanking section, and is cut when the counted number of cuttings is equal to the previously determined integer value N. An apparatus for identifying a surface defect blank in a blanking line, wherein the blank is identified as a surface defect blank including a surface defect portion detected at the inspection position.   On the upstream side of the blanking line, a predetermined printing process for one time is applied to an area of a certain length of the continuous sheet corresponding to the circumference of the plate cylinder by one rotation of the plate cylinder. A printing device for forming a delimiter of the region of the predetermined length on a continuous sheet by printing, a sensor for detecting a start timing of one rotation of the plate cylinder for performing the printing for one time, and a position of the inspection position A pulse generator for measuring a feed length of the continuous sheet from the printing apparatus on the upstream side, and each time the sensor detects the start timing, a pulse count of the pulse generator is provided. When the pulse generator outputs the number of pulses after the pulse count is cleared, the break of the continuous sheet is placed at the inspection position. 2. The method according to claim 1, wherein when the pulse generator outputs the pre-determined second pulse, it is recognized that the break of the continuous sheet is at the inspection position. Identification device for defective surface blanks in the blanking line.

Images