JPS63315465A - Defect inspection sheet cutting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a defect inspection sheet cutting device that inspects the front and back surfaces of a sheet and then performs sheet cuts on the sheet to classify the sheet into non-defective and defective products.

(Technical Background and Problems to be Solved) Figures 1θ (^) and (B) show an example of a device that cuts sheets of web paper in line with printing marks.
θ diagram (A) shows a device for inspecting the surface of the web after inspection, and 1θ diagram (B) shows a sheet cutting device.

In the inspection device shown in FIG. 1O (^), the sheet 140 is conveyed from a drum 71) on which the sheet 140 of the web is wound to a winding drum 72 and wound up. Light source 74 provided on 140
The inspection device 73 inspects the surface of the sheet 140, and a marking device 75 prints a predetermined defective mark on the portion where the defective portion is present. In this way, when the winding drum 72 on which the inspected sheet 140 has been wound is set in the sheet cutting device shown in FIG. 1θ (B) and the device is operated, the sheet 140 is
, loop portion 78. After being conveyed via rollers 77 and inspected for defective marks by a mark sensor 80, the sheet 140 is cut by a sheet cutter 81, and the cut sheet 140 is conveyed to a sorting device 90. The sheet 140 is conveyed by belt conveyors 91.92A to 92G provided in the sorting device 90, and at this time, the sorting means 93^ and 93B provided between the belt conveyors 92A to 92C select non-defective products based on the defect marks. , sort out defective products. Then, the defective products 141 are accumulated on the discharge stage 82, and the non-defective products 142 are accumulated on the discharge stage 83.8.
It is designed to be accumulated in four discharge stages. However, in such devices, for example, defect marking is performed using ink printing, thermal transfer, hole punching, etc., so when ink is used, there is a drying problem, and when thermal transfer is used, there is a problem of ink powder scattering. When drilling holes, set-off occurs due to problems such as steps around the hole, and it is difficult to eliminate errors in reading defective marks during the sorting process with sheet cutting equipment, which requires visual inspection by workers. . Furthermore, if a defective product were to be mixed into the product, the product itself would be defective. Further, the inspection device and the sheet cutting device are large in size, and it has been desired to create a compact device that is automated by combining these devices.

(Object of the invention) This invention was made under the above circumstances,
An object of the present invention is to provide a defect inspection sheet cutting device that eliminates the mixing of defective products and makes the device itself compact by integrating a sheet inspection device such as a paper roll and a sheet cutting device.

(Means for Solving the Problems) The present invention relates to a defect inspection sheet cutting device that cuts a sheet wound on a roll paper in accordance with printed marks. an inspection means for inspecting defects on the front and back sides of the sheet; a sheet cutting means for cutting the sheet inspected by the inspection means; and determining whether the cut sheets are good or defective based on the inspection data of the inspection means. a selective discharge unit that selects and discharges non-defective products; a data shift unit that transmits the inspection data to the selective discharge unit in synchronized timing for each sheet cut; and a start that automatically starts and stops the inspection operation in synchronization with the apparatus. This is achieved by providing a control means.

(Operation of the Invention) The defect inspection sheet cutting device of the present invention detects the position, etc. of a sheet on which designs and characters are printed using various sensors, and also performs surface inspection and back surface inspection of the sheet based on data from the sensor. Then, the sheets that have been cut are selected as good or defective and then accumulated.

(Embodiment of the Invention) FIG. 1 shows the internal structure of a defect inspection sheet cutting device 1 which is an embodiment of the invention.

A paper feed section is provided at the lower left of the defect inspection sheet cutting device 1, and the paper feed section is used to print patterns and characters as shown in FIGS. 2 to 4 on synthetic paper or laminated paper. A take-up roll 2 is provided on which a sheet 100 is wound.

The paper feed section uses a chucking system that allows one operator to easily attach the take-up roll 2. It has a side position adjustment function, and the reference position is easily displayed on the operation/display panel section 61. and can be easily adjusted. It also has a remaining amount detection function, and when the remaining amount becomes low, an alarm unit 69 is operated to notify the operator with an alarm, and the device 1 automatically stops when the remaining amount is zero. Take-up roll 2
Between the upper rollers 3A and 3B, there is a hood, paper, and pressing members 5A and 5.
A paper holding device 4 having a roller B is provided to temporarily hold down the sheet 100 being conveyed when the take-up roller 2 is replaced or the like. A roller 6 is installed near the paper pressing device 4.
A decurler having a curl correction mechanism consisting of 8 to 6C is provided to correct curls caused by curling of the sheet 100 being conveyed, and to prevent damage in subsequent processes. Rollers 78 and 7B below the decurler
A timing detection unit having mark sensors 8^ to 8C is provided in between, and in order to detect the sheet cut unit and the inspection unit, the printed mark printed on the back side of the sheet 100 is detected by the mark sensors 8A to 8C. It is now available for further reading. In addition, mark sensors 88 to 8C are arranged at positions that match the timing of mark reading and inspection start, and the mark sensors 8A to 8C arranged in plural numbers according to the sheet items shown in Figs. The automatically selected mark signal is output. A defect/stain inspection section is provided on the right side of the timing detection section. , and a back surface inspection section 63 having a back surface sensor 13 provided above the rollers 128 to 12c and near the rollers 120. In addition, since the cutting period differs depending on the item of the sheet 100, a phase adjustment section consisting of rollers J2B and 12G is provided to correct and match the positions of both inspection sections. It is done. Above the defect/stain inspection section is a roller 14A.

14B is provided, and a drive roller 15 and a nip roller 1 are provided.
6, the meat 100 is conveyed to the loop section 17.

The loop section 17 is located between the inspection section and the sheet cutting section 20, and the sheet 100 moves up and down in the direction of the arrow within the loop section 17, thereby balancing the continuous running of the inspection section and the intermittent running of the sheet cutter section 20. In order to keep the number of sheets constant from the inspection position to the sorting device 24, loop sensors 188 to 18G are installed at predetermined positions to detect the height of the sheets so that the loop amount remains constant. It is being The loop sensor 18A detects the upper limit of the loop amount of the sheet 100, the loop sensor 18B detects whether normal operation is performed by vertical movement of the sheet 100, and the loop sensor 18G detects the lower limit. . If an abnormality occurs in the loop amount, the operation of the machine is automatically stopped and the details of the abnormality are displayed on the operation 1 display panel section 61. Above the loop portion 17 is a roller 19.
The sheet 100 is conveyed from the loop section 17 to the sheet cutting section 20. Sheet cutting section 20
Inside is a mark sensor 21. Rotary encoder 22.
A cutter 23 is provided, and the mark sensor 8A~
The rotary encoder 2 adjusts the timing between the mark signal of 8C and the mark signal read by the mark sensor 21.
2, the conveyance amount of the sheet +00 is calculated, and the cutter 23 cuts the sheet 100. This cutting method is an intermittent feed cutting method, and it is possible to read marks and cut to a fixed size. On the right side of the sheet cutting section 20, there is a sorting device M.
24 is provided so that the cut sheets 100 are sorted at a speed that is approximately twice the feed speed of the sheet cutting section 20. Inside the sorting device 24, there are a mark sensor 27, belt conveyors 25, 26, and sorting means 2.
8 is provided, and the mark sensor 27 reads the printed marks based on the data from the defect and dirt inspection section, and the cut sheets conveyed by the belt conveyor 25, 26 are sorted by the sorting means 28 to identify defective sheets 101. The sheet 102 is discharged onto a discharge stage 29 provided below the sorting device 24, and the non-defective sheet 102 is conveyed to a conveying section 30 provided on the right side of the sorting device 24. The conveyance section 30 is provided with belt conveyors 31 and 32, and the good sheets 1 are stored in the accumulation section 33 on the right side of the conveyance section 30.
02 is accumulated. A cylinder 34 is located below the accumulation section 33.
is provided and a certain amount of non-defective sheets 102 have been accumulated, the operator enters the necessary information on the operation 1 display panel section 61 and moves the cylinder 34 up and down to take out the non-defective sheets 102 in the direction indicated by the arrow. In addition, the stacking section 33 can easily adjust settings such as pitch and width according to differences in product dimensions.
Furthermore, countermeasures to eliminate static electricity (ionized air spraying) have been taken.

FIG. 5 shows a block diagram of the electric circuit system of the defect inspection sheet cutting device 1, and a sequencer 70 for controlling the entire defect inspection sheet cutting device 1 is provided in the center of the figure. The sequencer 70 includes an operation display panel section 61 that displays control operations such as manual input of the operating procedure of the apparatus l, the reference position of the paper feed section, and abnormalities in the loop section, and the surface inspection section 6.
2. Back surface inspection section 63 and mark sensors 8A to 8G.

21.271. There is an abnormality in the operation of the sensor section 64 consisting of a loop sensor 18A, N18c, etc., the drive motor 65 that drives the drive roller 15, the nip roll section 66 that controls the nip roll 16, the sheet cutter 20 and sorting device 24, and the device 1. Alarm unit 6 that issues an alarm when there is
9 is connected. A shift register 71 and a data buffer 72 are provided in the sequencer 70, and the shift register 71 converts the inspection data HD from the front surface inspection section 62 and the inspection data BD from the back surface inspection section 63 into, for example, the inspection data +10 by 20. The inspection data BD is written as 30 stages and compared with preset data, and if there is a defect, 1 is output, and if there is no defect, 0 is output. Then, the sequencer 70 judges the above data (1 or O) to determine whether the sheet is good or bad, and sends a signal to each of the above sections to control the entire apparatus 1. The data buffer 72 is connected to the surface inspection section 62. A delay occurs between the data by adjusting the timing difference between the human power data from the rear surface inspection section 63 and the sensor section 64 and the operation time of the drive motor section 65, nip roll section 66, sheet cutter section 67, sorting device section 68, etc. This ensures that data can be transferred normally even if the

Next, details of the surface inspection section 62 will be explained.

FIG. 6 shows a circuit block of the surface inspection section 62,
Illumination light OP is irradiated from the light source 11 onto the surface of the sheet (web) 100 being conveyed, and reflected light FP containing information such as the pattern of the sheet 100 is received by the CCO camera IO, as shown in FIG. 7(A). The image signal GS is manually input to the surface inspection section 62. The manually inputted image signal GS is inputted to the differentiating circuit 40, and the differential signal 85 shown in FIG.
1 is man-powered. In the binarization circuit 41, a binarization signal NS shown in FIG. 7(C) is manually inputted to the consecutive number judgment circuit 42 based on preset threshold levels SLI and SL2 shown in the figure. The continuous number judgment circuit 42 has a setting value ST of the image data of the pattern of a non-defective product manually inputted in advance, and the pixel value P of the binarized code is determined based on this setting value ST.
C is continuously counted and judgment data GD is written into the memory 43. The consecutive number judgment circuit 42 reads out the judgment data GD and inputs the judgment signal GS to the latch circuit 44 . The latch circuit 44 is manually supplied with the mark signal MS from the mark sensors 8Δ to 8C, and the judgment signal GS is divided into predetermined portions at the timing of the mark signal MS and stored in the shift register 45 as a latch signal R5.
is determined based on the preset good and bad data, and for example, if there is a defect, it will be 1, otherwise it will be 0
is input to the selection circuit 46 as the register signal LS.

The register signal LS is determined by the sorting circuit 45, and inspection data (ID) indicating whether the sheet is good or defective is manually inputted to the sequencer 70.

Next, details of the back surface inspection section 63 will be explained.

FIG. 8 shows a circuit block of the back surface inspection section 63, and the back surface sensor 13 consisting of a plurality of sensors is used as shown in FIG.
The printed mark 110 on the back side of the sheet 100 shown in A) is detected, and the mark signal MS is manually input to the back side inspection section 63. The input mark signal MS is input to the A/D conversion circuit 52, and the ^/D-converted digital signal DS is input to the SW circuit 53. Here, the vertical (Y) of the printing mark on the back side is stored in advance in the memory 56 as shown in FIG. 9(B).
, S is recorded in the horizontal (×) data, and the SW circuit 5
3 inputs the SW signal to the memory 56 and stores the above data KS.
is input to the comparison circuit 54 as the reference data S, and the image signal O5 is timed and manually inputted to the comparison circuit 54, which compares it with the reference data S and outputs the comparison signal FS. The signal is input to the level comparison circuit 55. The judgment level comparison circuit 55 is manually inputted with set values STI for good and bad printing marks in advance.
The comparison signal FS is compared and determined based on this set value STI, and the inspection data 80 is input manually to the sequencer 70. In addition, in this back surface inspection section 63, mark signals MS and a conveyance amount signal LS indicating the sheet feed amount are manually input by mark sensors 8A to 8G and a rotary encoder, and each part of the back surface inspection section 63 receives the above-mentioned signals MSI, It operates at the same timing as the LSI.

Next, the operation of the defect inspection sheet cutting device 1 will be explained.

First, as shown in FIG. 1, the winding roll 2 on which the sheet 100 is wound is set in the paper feed section, and the leading edge of the sheet is passed through the rollers 3A to 19B to the sheet cutting section. Set up to 20. At this time, the surface inspection section 6
2 and the back surface inspection section 63 using the phase adjustment section, and also adjust the loop amount of the loop section 17. In this manner, when the setting is completed, the user operates the operation display panel section 61 to operate the device 1. The print mark 110 on the back side of the sheet 100 is detected by the mark sensors 8A to 8C, and the inspection data HD on the front side of the sheet 100 is detected by the light source 11 and the CCDC camera based on the mark signal MS and the conveyance amount signal LS of a rotary encoder (not shown). The inspection data BD of the back side of the sheet 100 is inputted to the sequencer 70 by the sensor 13, and the sequencer 70 determines whether the sheet 100 is good or bad. In this way, the inspected sheet 100 is transferred to the drive roller 15. It is conveyed to the loop section 17 by the nip roller 16. In the loop section 17, the loop amount of the sheet 10θ is controlled to be kept constant by loop sensors 18A to 18C, and the sheet 100 from the loop section 17 is conveyed to the sheet cutting section 20 via the roller 19, and is cut as described above. The sheets cut into sheets are conveyed to the sorting device 24, and the sequencer 70 discharges the cut sheet lots of defective sheets to the discharge stage 29 as described above based on the above-mentioned good/bad judgment, and selects good sheets. 102 is the transport section 3
0 to the stacking section 33 and stacked as non-defective sheets 102.

If an abnormality occurs in the apparatus 1 during the above operation, the sequencer 70 activates the alarm section 69 to issue a warning to the operator, stops the apparatus 1, and displays the abnormality on the operation display panel 61.

(Effects of the Invention) According to the defect inspection sheet cutting device of the present invention, there is an advantage that it is possible to save the labor of personnel who would otherwise be required to carry out visual inspections and the like. Furthermore, since defective cut sheets are not marked, good products can be selected from the defective products and used, further improving yield. Furthermore, there is the advantage that the device itself is integrated and becomes very compact.

[Brief explanation of the drawing]

FIG. 1 is an internal structure diagram of a defect inspection sheet cutting device which is an embodiment of the present invention, FIGS. 2 to 4 are diagrams showing the state of the sheet, and FIG. 5 is an electric circuit of the defect inspection sheet cutting device 1. A block diagram of the system, FIG. 6 is a circuit block diagram of the front surface inspection section, FIG. 7 (A) to (C) are diagrams showing the signal waveforms, FIG. 8 is a circuit block diagram of the back surface inspection section, and FIG. 9 (^) is a diagram showing the back side of the sheet, Figure 9 (B) is a diagram showing the state of data stored in the memory, Figure 10 (A) is a structural diagram of a conventional sheet inspection device, and Figure 1O. (B) is a diagram showing the structure of the sheet cutting device. 1... Defect inspection sheet cutting device, 2... Winding roll, 3A, 38.68~6G, 7A, 7B, 9^, 9B
, 12A to 120, 14A, 14B, 19... roller, 4... paper presser, 5A. 5B... Paper pressing member, 8^~8C, 21, 27...
Mark sensor, lO... CCD camera, 11... Light source, 13... Surface sensor, 17... Loop section,
1B8~lllIc...Loop sensor, 20...Sheet cut section, 22...Rotary encoder, 23...
... Cutter, 24... Sorting device, 25, 26° 31.
32... Belt conveyor, 30... Conveyance section, 33.
... Accumulating section, 34... Cylinder, 100... Sheet. Applicant's agent Yu Yasugata Sancha 2 Giant Goat 3 [I Chao Nagi-1111. Chi 7 figure Ki 9 figure

Claims (1)

[Claims] In an apparatus for cutting a sheet wound on a roll paper according to a printed mark, the apparatus includes an inspection means for inspecting defects on the front and back surfaces of the sheet being conveyed, and a sheet cut for the sheet inspected by the inspection means. a sheet cutting means; a selective discharge means for selecting and discharging the cut sheets as good or defective based on the inspection data of the inspection means; 1. A defect inspection sheet cutting device comprising: data shifting means for transmitting data to a part; and start control means for automatically starting and stopping the inspection operation in synchronization with the device.