JPS62236742A - Apparatus for detecting printing flaw - Google Patents

Abstract

PURPOSE:To detect the printing flaw of a pattern at a high speed using a sensor head for detecting the printing flaw, by performing the positioning of the pattern printed on a printed matter so as to optically detect the same accurately. CONSTITUTION:Printing flaw detecting sensor heads 2A, 2B are arranged on the support members 28, 28 of position adjusting devices 20A, 20B having the same structure so as to be positioned at the peripheral surface top parts of fixed rolls 6A, 6B and the distance detectors 18A, 18B mounted on both end parts of the sensor heads are connected to a display device 19. At first, the gaps between the sensor heads and the fixed rolls are made constant. Next, a handle 33 is operated so that the values displayed by the distance detectors 18A, 18B become min to allow the sensor heads to position at the peripheral surface top parts of the fixed rolls. As the last step, both ends of a main roll 26 are fixed to a stopper. Next, a DC motor 8 is rotated and a moving roll is allowed to rise and fall to change the length of the path between the fixed rolls to perform operation for allowing the printing flaw detecting sensor heads to position directly above the same pattern part of a sheet W and the sheet W is allowed to run to detect the printing flaw of the pattern part.

Description

Detailed Description of the Invention 3. Detailed explanation of Light 1!1 (9. Technical field of Ming) This invention is aimed at reducing printing stains that occur when printing on packaging materials such as plastic film, paper, and aluminum. Printing defect detection that detects defects such as by illuminating and photometering the printed surface using an optical fiber and performing color photometry? ) 3 fl.

(Technical background of the invention and its problems) In general, for printing defects such as ink scattering and doctor streaks that appear in spots during high-speed continuous printing, and defects such as dust adhesion.

Detection is difficult, so either stop the machine at the beginning or end of one roll and visually inspect only a small portion, or use a strobe light in synchronization with the paper feed speed to perform a visual inspection. method is used. but,
Because it is not a 100% inspection or the inspector overlooks it, defective products may be mixed in, and it is often F! i'iri
was occurring.

As a detection device for such printing defects, visible light is
? ? Two sets of detection units are used, each consisting of a plurality of light-receiving surfaces of a photosensor element that separates the light into colors and green and generates an output voltage. The detection units are arranged in a direction perpendicular to the flow direction, and the intervals between the detection units are set to be shifted by one or several pitches of the printed pattern, and the optical sensor elements are arranged so as to correspond to each other with respect to the flow direction of the print sheet.
Then, the reflected light from the printing sheet is received by the above-mentioned 2M1 detection unit, and the difference voltage is calculated for red, green, and blue of the corresponding photosensor elements of the two sets of detection units), and this difference voltage is set in advance. There is a device that detects defects in printed matter by comparing it with a set voltage.

FIGS. 28(A) and 28(B) are explanatory diagrams showing the positional relationship between this detection unit and the printing sheet, 400A.

400B is a detection unit, 403 is a control device, W is a printed sheet, AP and BP are printed patterns. They are arranged at right angles and spaced apart by one pitch of the printed pattern, and the same pattern is continuously printed on C)W. Therefore, Fig. 28 (B
), the color sensor 402A in the detection unit 400A and the color sensor 402B in the detection unit 400B are located directly above the corresponding portions of the adjacent patterns Ap and Hp, that is, the same pattern portion. Similarly, for other color sensors, the detection unit 40OA and the detection unit 400B are positioned at the bottom of the same picture area.

In this way, two detection units 400A and 400
Irregular defects on the sheet W are detected by installing B at a position separated by one pitch or several pitches from the printed pattern on the sheet W, and calculating and processing the detection signals of each detection unit by the control device 403. can do.

However, in order to accurately detect defects in printed matter using the method described above, each of the detection units 400A and 400B must be
It is necessary to make the detection conditions completely the same, and in order to obtain this same condition, it is necessary to detect defects in printed matter while preventing the position of the sheet W from fluctuating due to fluttering, etc. There are problems with the characteristics of the optical sensor element, the viscosity for detecting defects, etc., and there are problems in that it costs a lot of money to realize this device, and it is difficult to manufacture and miniaturize the device.

(Object of the Invention) This invention was made in view of the above-mentioned circumstances, and an object of the invention is to position a pattern printed on a printed matter so that it can be accurately optically detected, and to provide a sensor for detecting printing defects. It is an object of the present invention to provide a printing defect detection device that can accurately detect printing defects of this pattern at high speed using a head.

(Summary of the Invention) (+) This invention relates to a printing defect detection device, which uses color photometry to detect defects in printed matter conveyed by a pair of fixed rolls and a moving roll provided on the pair of fixed rolls uH. (a) a pair of print defect detection sensor heads provided close to the circumferential surfaces of the pair of fixed rolls so as to optically read and detect print defects in the printed matter;

(b) a distance detector attached to the pair of print defect detection sensor heads, which detects each distance in the horizontal and vertical directions of each of the print defect detection sensor heads with respect to the pair of fixed rolls; and a display device that displays the distance detected by the distance detector.

(d) a positioning device for moving the sensor head for detecting printing defects in the horizontal and vertical directions; a pair of sub rolls arranged in parallel provided within this positioning device; A sensor head for defect detection is installed vertically.
Orthogonal to each of the above sub-rolls, t! a positioning mechanism configured to be MIj-operated by a main roll which has been moved, each of the sub-rolls being able to move up and down independently, and also being able to swing the sensor head for detecting printing defects;

(e) a moving device that moves the moving roll in the vertical direction;

(f) a pair of mark detection devices provided near the surface of each of the pair of fixed rolls to detect a printing press register mark printed on the printed material; (g) a synchronization register printed on the printed material; a mark detector configured to detect marks and register marks for detecting printing defects; a control device that detects only the printing defect detection register mark based on the above, and controls the moving device so that the pair of mark detection devices can detect the printer register mark;

(i) a plurality of sets of light emitting optical fiber layers formed in layers using a plurality of optical fibers, each end of which is bundled with the print defect detection sensor head; and U) each of the above light emitting lights. a plurality of sets of light-receiving optical fiber layers (k) formed in layers using a plurality of optical fibers so as to be adjacent to the fiber layer, each one end of which is bundled with the above-mentioned print defect detection sensor head; A photosensor element consisting of a bare type photosensor chip in which two adjacent single type photosensor chips on a semiconductor substrate are made into a set without being divided, with each other end of the input being input.

(1) Using the output of this optical sensor f element as input, a #multiplier,
Consisting of a differential amplifier connected to this amplifier, and a comparator that detects printing defects on the printed material by inputting the output of this differential amplifier and a set voltage that serves as a reference for detecting printing defects on the printed material in advance. It is composed of a dual in-line hybrid IC in which lead wire terminals are divided and arranged in multiple directions on the input/output side to facilitate mounting and wiring.

(2) In a device that uses color photometry to detect defects in printed matter conveyed by a pair of fixed opening rolls and a moving roll provided between the pair of fixed rolls, (a) Printing defects in the printed matter; (b) a pair of print defect detection sensor heads provided in close proximity to the circumferential surfaces of the pair of fixed rolls so as to optically read and detect; (b) a pair of print defect detection sensor heads attached to the pair of print defect detection sensor heads; , a distance detector for detecting distances of each of the printing defect detection sensors in the horizontal and vertical directions with respect to the pair of fixed rolls; (C) an indicator for displaying the distances detected by the distance detectors; and (d) a position adjustment device for moving the sensor head for detecting printing defects in the horizontal and vertical directions, and a pair of directing sub-assemblies with an elliptical cross section provided within the position adjustment device. The roll and the sensor head for detecting printing defects are installed, and the main roll is placed orthogonally to each of the sub-rolls in I-, and each sub-roll in L can rotate independently. and (e) a moving device that moves the moving roll in the L downward direction.

(f) a pair of mark detection devices provided near the surface of each of the pair of fixed rolls and configured to detect a printer register mark printed on the printed material; (g) a pair of mark detection devices configured to detect a synchronous register mark printed on the printed material; With a mark detector to detect.

(h) being connected to the pair of mark detection devices and the mark detector, and detecting and counting the synchronization register mark with the mark detector;

(i) a control device that controls the moving device so that the pair of mark detection devices can detect the printing press register mark for a poem whose count number reaches a preset value; A plurality of sets of optical fibers for light emitting are formed in layers using a plurality of optical fibers, and one end of the valley is bundled with the sensor head for detecting printing defects; a plurality of sets of light-receiving optical fiber layers formed in a layered manner and having one end of each set facing toward the print defect detection sensor head so as to be adjacent to the light-emitting optical fiber device;

(k) ,f- A photosensor element consisting of two adjacent single-type photosensor chips on a semiconductor substrate, with red, green, and blue being input in this order to each other end of the light receiving optical fiber layer. .

(1) a plurality of sets of light projecting means configured to project light onto the plurality of sets of light projecting optical fiber layers to bring the output of the optical sensor element within a saturation level; and (W) h2 plural sets of light projectors; (m) an amplifier whose input is the output of the i2 photosensor element; and a comparator that detects printing defects on printed matter by inputting the output of the differential amplifier and a set voltage that is a reference for detecting printing defects on printed matter in advance. It consists of a detection circuit.

(Embodiment of the Invention) The printing defect detection device of the present invention positions the sensor head for printing defect detection and the fixed roll using a position adjustment device and a positioning mechanism while displaying the distance on one display. Then, a mark detector and two sets of mark detection devices are used to move the moving roll up and down to adjust the image of the printed matter being conveyed to a position where it can be optically detected by the print defect detection sensor head, and detect the print defect. The detection light detected from the pattern by the sensor head is converted into an electrical signal by the optical sensor element, and this electrical signal is judged by an amplifier, a differential amplifier, and a comparator installed in the dual in-line hybrid IC to determine the pattern. It is designed to detect printing defects.

FIG. 1(A) is a schematic front view of an apparatus showing an embodiment of the present invention. In the figure, 2A and 2B are print defect detection sensor heads, 3 is a control device for the print defect detection sensor head, 4 is an optical fiber that connects the print defect detection sensor head and the control device 3, and 5^, 5B. is a mark detection device, 5G is a mark detector, 13A and 6B are fixed rolls,
7 is a control device, 8 is a DC motor which is a moving device, 9 is a moving roll, 18A and 18B are distance detectors, and 19 is a display.

20^, 20B are print defect detection sensor heads 2A, 2
B is a position adjustment device, and W is a sheet of printed material on which a pattern is printed.

The printing defect detection sensor heads 2A and 2B have the same structure Ft! The position adjusting devices 20A, 20B are placed on the support members 28, 28 of the adjusting devices 20, 20B, and are located at the top of the peripheral surface of the fixed rolls EiA, 8B, and the position adjusting devices 20A, 20B are arranged to face each other. Print defect detection sensor head 2A, 2
Distance detectors 18A and 18B are attached to both ends of B, and the distance detectors 18A and 18B are connected to the display 13. These distance detectors 18A and 18B include magnetic sensors,
The display 19, which uses a photoelectric sensor, a capacitance iM sensor, etc., displays the distance between the printing defect detection sensor heads 2A, 2B and the fixed rolls 8A, 8B measured by the distance detectors 18A, 18B. However, the distance measured by each distance detector 18^, 18B may be directly displayed, and it may also be possible to directly display the measured distance of each of the distance detectors 18^, 18B. This determination may be made using a lamp display or the like.

FIG. 1 CB) is a left side view of the position adjustment device 20A.

In the same figure, a pair of distance detectors 18A, 18A are attached to both ends in the longitudinal direction of the sensor head 2A for printing defect detection, and support members 2B, 28 on which the sensor head 2A is set for printing defect detection. The upper part of .28 is fitted and fixed to the main roll 26, and both ends of the main roll 26 are placed on sub rolls 27A and 27B.

FIG. 2 shows a schematic diagram of the positional relationship between the main roll 2B and the sub rolls 27A and 27B. A main roll 2B having a circular cross section is placed as shown in FIG. A support member 28 is provided vertically on the main roll 26, and the above-described sensor head 2A for detecting printing defects is connected to the lower end of the support member 28. :tS3 shows a front view of such a detection device, and FIG. 4 shows its side view. The auxiliary rolls 27A and 27B are fixed together on the upper part of the roll support member 25 as shown in FIG.
A loft 24 having a threaded portion to which a handle 22 is fixed at the upper end is rotatably attached to the upper part of the loft 5 . The threaded portion of the rod 24 engages the threaded portion of the block 23, which is secured to the bottom end of the channel 21. Ids 32 and 32 are fixed to the back side of both ends of the channel 21 with Y1 parts, and a screw part 32 and 32 is fixed to the back side of the center bottom part. ! & member 36 is fixed. Along the longitudinal direction of this channel 21, a pair of ann.
The angles 35 and 35 are arranged such that both ends of the angles 35 and 35 are connected to channels 3 provided at right angles to the angles 35.
0.30, this channel 30.30 is fixed to the frame (not shown) of the printing or rewinding machine. A fixed block 34.34 having a through hole is fixed to the center of the upper surface of the angle 35.35, and a lead screw 37 with a handle 33 fixed to one end thereof is rotatably held in the fixed block 34.34. is engaged with the threaded portion of transfer #1 member 38. The upper surface of the channel 30.30 has a rectangular member 31.
31 is fixed, and the square member 31.31 is connected to the channel 21.
It is slidably fitted into guides 32.12 provided at both ends of the. Therefore, by rotating the handle 33, the roll support member 25, which is supported by the rods 24 and 24, can be moved forward and backward along the longitudinal direction of the channel 30.
25, the detection roller 26 and the detection device 2A set on the support member 28, 28, 28 advance and retreat as one.

17J constant a-rules 6A and 8B have mirror-finished peripheral surfaces and are rotatably supported by a printing press frame (not shown) at predetermined intervals. Near the peripheral surfaces of the fixed rolls GA, 8B, sensor heads 2A, 2B for detecting printing defects are installed at the top, and mark detectors 5G, mark detection devices 5A, 5B are installed at the side on the entrance side of the sheet W. The mark detector 5C and the mark detection devices 5A and 5B are connected to the control device 7. In addition, fixed rolls 8A and 8B
A movable roll 9 is rotatably supported by a pair of movable members ]0 below the middle. The moving member IO is provided with a threaded portion (not shown) that engages with the lead screw 11, so that the rotation of the lead screw 11 causes the moving roll 9 to move up and down together with the moving member IO. The lead screw 11 is rotatably supported at both ends by support members 13.14, which are fixed to a frame (not shown) of a printing or rewinding machine. A gear 12 is fitted and fixed to the tip of the lead screw 11 on the support member 14 side, and the gear! 2 is fitted and fixed to the rotating shaft of the DC motor 8 and meshes with the gear 15, and the ILC motor 8 is connected to the control device 7. Therefore, the mouth C motor 8 is rotated by a command from the control device 717, and the moving roll 9 is moved up and down by this rotation.

Next, a positioning operation using the above device will be explained.

First, by rotating the handles 22 and 22 alternately, an operation is performed to make the gap between the print defect detection sensor head 2A and the fixed roll θA constant in the axial direction of the fixed roll θ^, that is, the printing defect is detected. By rotating the handle 22 of the detection sensor head 2A, the rod 24 fixed to the handle 22 moves up and down, and the roll support member 25 moves up and down. Since both ends of the main roll 2B are only inserted into the auxiliary rolls 27, 27, only one side of the main roll 28 is raised and lowered, and the support members 28, 28.
Sensor head 2A for printing defect detection set in 28
Only one side of is in contact with and separating from the fixed roll 8A.

Further, the sub rolls 27A and 27B have a circular cross section as described above, and the main roll 28 placed on E also has a circular cross section, so the main roll 26 is similar to the sub roll 2.
? A and 27B, the printing defect detection sensor head 2A, which is vertically disposed on the main roll 26, moves at the position indicated by the broken line in FIG. Therefore, during normal operation, the printing defect detection sensor head 2A is in a static position, as shown by the solid line, at a position facing the reference surface 100 (here, the fixed roller 8A and the sheet W), and the supporting member is 28 to 411! By moving the print defect detection sensor head 2A, the bottom part of the print defect detection sensor head 2A can be cleaned with a cloth or the like, and even if the light receiving surface of the print defect detection sensor head 2A becomes dirty, maintenance thereof becomes easy. In addition, the sub rolls 27A and 27B are each independently set to L''.
By rotating the handles 22 and 22 alternately, the surface of the print defect detection sensor head 2A connected to the support member 28 can be moved to an arbitrary position with respect to the reference surface 100. , both ends of the printing defect detection sensor head 2A can be raised and lowered independently. During this operation, the distance between the printing defect detection sensor head 2A and the fixed roll 6A is displayed on the display 19 by the distance detectors 18A, 18A.

Sensor head 2A and fixed roll 6 for easily detecting printing defects
It is possible to check the parallelism between the RAD 2A and the fixed roll 6A by tilting or keeping the gap between them constant, and by using the print defect detection sensor. At this time, the distance between the printing defect detection sensor head 2A and the fixed roll 8A is set within a predetermined range.

Next, the handle 33 is rotated to position the printing defect detection sensor head at the top of the circumferential surface of the fixed roll 8A. move. This will change channel 21 to channel 30.30
moving in the longitudinal direction of the rods 24, 240, the supporting members 25, 25, the main roll 26. Support member 28, 28.2
8 move together, and the printing defect detection sensor head 2A set on the support members 28, 28, 28 moves forward and backward with respect to the running direction of the sheet W. During this operation, the distance between the print defect detection sensor head 2A and the fixed roll 6A is detected by the distance detectors 18A and 18A on the display 19.
Therefore, the handle 33 should be operated so that the number of digits displayed as 1 is minimized.

After this, if the distance between the detection unit 2A and the fixed roll 6A changes and deviates from the predetermined range, the handle 22.
22 to a predetermined distance, and finally, by fixing both ends of the main roll 2B with stoppers (not shown), the printing defect detection sensor head 2A is fixed at a predetermined distance from the fixed roll 6A. The operation of positioning it at the top of the circumferential surface of is completed. Similarly, the positioning operation of the print defect detection sensor head 2B is performed.

Next, the sensor heads 2A and 2B for detecting printing defects detect the sheet W.
This operation is performed by pressing the operation switch () of the control device 7 shown in FIG. 1(A).
(not shown) rotates the C motor 8, raises and lowers the movable roll, and changes the length of the path between the fixed rolls GA and 8B.

After this, a method for correcting the pattern position when the tension of the sheet W changes and the pitch of the printed pattern changes will be explained.

In this method, a registration mark for printing defect detection is printed as a thin clear line segment at a predetermined position in the margin of the column where the printing machine registration mark PM etc. of the printing pattern is printed, and then By detecting the detection register mark separately from other marks, the position of each pattern can be detected accurately.

FIG. 5(A) is an external view showing an example of a continuous printed matter used in this method. On the outside of the printing margin of this continuous printed matter 110, there is one printed line between the pitch CPI, which is four times the printing pitch PP of the picture. Along with the machine register mark PM, density check mark 011, extra color mark detector, etc., a register mark SN for printing defect detection is printed at a predetermined position in the margin, and a synchronization mark is printed at the corner of each pattern. A reference mark M is printed on each. And this continuous printed matter 11
The printing pattern is continuously and repeatedly printed at the pitch CPI over the entire sheet length of 0. Here, for example, as shown in the enlarged view of the pattern PI in Figure CrJ), the printing defect detection register mark SMI is arranged within the width of the synchronizing register mark Ml in a direction perpendicular to the flow direction of the continuous printed matter 11G. This synchronization register mark is printed in a line segment with a narrower width than the old one at a position outside the printing margin, and this print defect detection register mark SN is also printed continuously at a pitch of CP1. As mentioned above, other marks are also printed in the column where this register mark SN for printing defect detection is printed, and when this column is scanned, the same figure (
As shown in B), this register mark SN for detecting printing defects
and other marks are detected, and it is not possible to detect only this register mark SN for printing defect detection by just scanning this column.Therefore, as shown in the same figure (C), the corner of the image is scanned and the above By detecting the register mark M1 for synchronization and ANDing the signal shown in FIG.

Since only the print defect detection register mark series is synchronized with the synchronization register mark M, it can be distinguished from other marks and detected accurately. By generating a gate signal based on the detected printing defect detection register mark SN, a specific mark can be detected from among the printing press register marks PM shown in FIG.

Next, with reference to FIGS. 6(A) to 6(E) showing register mark synchronization detection characteristics and FIG. 1, this method of correcting the pattern position of continuous printed matter will be described below.

As shown in FIG. 1, continuously printed printed matter 110
(denoted here as W) is input roll 16. as described above. It is transported by being wound around fixed rolls GA, 8B, moving rolls 9, and output rolls 17. In the middle of this conveyance path, there is a mark detector (hereinafter referred to as a synchronization mark/scanning head) 5G that detects the above-mentioned synchronization register mark M, and register mark measurement for detecting printing defects described in L and a register for printing presses. Two sets of mark detection devices (hereinafter referred to as printing press register mark scanning heads) 5A and 5B for detecting marks PM are provided. Here, as shown in FIGS. 6(A) and (C), in synchronization with the detection of the 7171 m register mark 7M by the synchronizing register mark scanning head 5C, this register mark for printing defect detection is scanned. 7 to the above-mentioned scanning so that the scanning head 5A detects the index mark S for printing defect detection.
Do 5A and 5B have pitch CPl? &Ia times (in this case, 1 pitch cpi). On the other hand, these two sets of register mark scanning heads 5^ and 5B for printing defect detection, for example! They are arranged at positions shifted by pitch CPI. Then, when the control device 7 described in h above starts printing defect detection from the pattern PI where the old synchronization register mark is printed in the corner of the pattern, the first
As shown in Figure (A), the synchronization reference mark/scanning head 5C reads the synchronization reference mark Ml, generates one pulse, and sequentially M2, . )13. >14. Nil
, M12. M13゜M14. M21. A pulse signal is generated one by one each time it is read. Here, the register mark/scanning head 5C for synchronization and the register mark/scanning head 5^ for detecting printing defects are L.
, are disposed to be synchronized as described above, so that when the printing defect detection register mark/scanning head 5B scans the column in which the print defect detection register mark SN is printed, as shown in FIG. 6(B). Among the signals shown in , register mark SN for printing defect detection synchronized with the above pulse signal
can only be detected. Here, in synchronization with this mark freeze detection signal, a lock pulse CL is generated as shown in FIG. 4(E). The number of pulses of this clock pulse CL is determined by a specific mark PN in marks SMI and PMI.
It is set in advance to correspond to the time lag when the scanning head 5B reads 1a. Then, at the same time as the counting of the glock pulses CL ends, the gate signal G is generated. That is, (G), (E) and (F) in the same figure.
As shown in FIG.
When the clock pulse CL2 is read, a clock pulse CL2 is generated, and when a predetermined number of counts are completed, a gate signal G2 is generated. This gate signal causes two sets of register marks for printing defect detection.
Scanning rads 5A and 5B select specific marks PM1a and PM2 from printing press index marks PMI and PN2.
Detect a. Therefore, if these two sets of marks PM1a and PM2a can be detected synchronously, the control device 227 determines that the conveyance pitches of these two patterns P1 and pH are synchronized.

Here, the time width of the gate signal CL is:

Since the time width is wider than each line segment of the register mark PM for the printing and column machine, even if there is a printing deviation or conveyance deviation within this time width, these two sets of marks PM1a and P)12
This means that a can be detected synchronously.

- On the other hand, the above mark PN1 detected by these two sets of printing defect detection register marks/scanning rads 5A and 5B.
a and PM2a are deviated as mentioned above, and are checked in synchronization.
If B is not possible, move the moving roll 9 shown in FIG. Two sets of registration marks for printing defect detection - scanning radars 5A and 5B are the above marks PM1a and PM
2a can be detected synchronously, and this printed matter 110
It is possible to synchronize the conveyance pitch of the picture with the δ pitch of the two sets of printing defect detection register marks and scanning rads 5A and 5B.

As shown in FIG.
The light is emitted from the light emitting parts of the pair of print defect detection sensor heads 2A and 2B, and the reflected light is measured by the light receiving parts of the two print defect detection sensor heads 2A and 2B, respectively, and is connected to the optical fiber 4.4. The light sensor element -f- provided in the control device 3 via the light sensor element -f- and the dual in-line hybrid IC connected to the terminal of this light sensor detect parts with the same pattern D: - Printing defects are detected as described in .

Next, details of the above-mentioned print defect detection sensor head will be explained.

No. 71) 4(A) is a diagram showing a schematic structure of the above-described print defect detection sensor head 2A, and the second print defect detection sensor head 2B has a similar structure. As shown in the diagram showing the end face of FIG.
. optical fiber 5
11,512,513 as above and won 785 points.
It is formed in a layered manner, and the laminated functional light receiving parts are formed so as to be integrated. The length of this sensor head 2A for detecting printing defects (J) in the width direction perpendicular to the flow direction of the sheet W is arbitrarily formed in accordance with the dimensions of the printed matter. Now, in the same figure (B) showing the XX' cross-sectional view, if the distance LL between the print defect detection sensor head 2A and the printed matter 509 is set to about 11 mm, the light reception for green (G) will be as shown in the figure. The G light-receiving area JJc of the optical fiber layer J6 is the light-emitting area TTs of the adjacent light-emitting optical fiber layers TT2 and ↑T3 that are in contact with both sides of this optical fiber layer for light-receiving.
It can be seen that photometry can be performed because the light exists within the . Similarly, the light-receiving optical fiber layer J for each of the other colors (R, B)
The light-receiving areas of R and Je are also connected to the light emitting optical fiber layers on both sides that are in contact with each other (for JR, 1↑11TT2 and for B, TT3).
, TT4), and can be photometered.

The printing defect detection sensor head 2A having such a configuration is as follows:
As shown in FIG. 8(A), as the two sets of sensor heads 2A and 2B of the above-mentioned printing defect detection device, the end faces on the printing surface side are formed as shown in the BB-8R cross-sectional view of FIG. 8(B). TTI N? The terminal part of 〒4 is for two sets of sensor heads.
are bundled together to form a light condensing section 51B. This light gathering i'! 1151B, as shown in the CG-CC' cross-sectional view of the same figure (C), each light emitting optical fiber is bundled in a circular shape so as to be in close contact with each other, and the end that corresponds to the light converging surface is The end face of the fiber forms a uniform surface. A halogen lamp 517, which is a light emitting source, is placed opposite to the end of the light condensing section 51B. A shielding plate 5
18, and only the light beams whose heat rays are shielded by the heat ray shielding plate 518 are incident from the end face of the condensing section 518, and are transmitted to the printed matter (not shown) by the light emitting optical fiber of each printing defect detection sensor head. ) will be irradiated. Since this device uses glass fiber for each optical fiber, it has good heat resistance and can be used with a powerful light source. This means that even minute printing defects can be accurately identified.

On the other hand, each color (
R, G, B) Optical fiber layer for light reception J*, JG, JB
The terminal end of the is divided into measurement areas for each color, and is combined into two sets of print defect detection sensors/RAD groups to form a plurality of sets.
Each color (R, G, B) light-receiving element 510A, 510R, 510G in which a plurality of light-receiving elements 510A, 510R, and 510G are arranged in a row horizontally is connected to each measurement area.
, JG, and JB are respectively sent to this bare type photosensor element 510.

The differential voltage between the two sets of light receiving elements for each color is calculated by a defect detection circuit installed inside the dual in-line hybrid IC (described later), and printing defects are detected by comparing this differential voltage with a preset voltage. It will be possible to detect it. Here, since the light-receiving optical fiber is formed in close contact with the width direction perpendicular to the flow direction of the sheet W, as shown in FIGS. 9(A) and (B), the light-receiving optical fiber layer is The photometric characteristics are that uniform light IQ can be measured continuously in the width direction perpendicular to the flow direction of the sheet for each color (R, G, B), and continuously over the entire printed surface of the printed material according to the flow of the sheet. This means that printing defects can be detected evenly.

Next, the optical sensor chip constituting the above-mentioned bare type optical sensor element will be explained.

FIG. 10 schematically shows the manufacturing process of a single-type optical sensor chip 130.
An amorphous silicon layer is formed on the semiconductor substrate 120, such as a glass substrate, on which is formed a glow discharge separation process S1, and the semiconductor substrate 120 is subdivided into amorphous silicon chips 730^, 732A, . . . Furthermore, amorphous silicon chips 730A, 7 are formed by processing S2.
32A... surface electrode 730B such as a metal electrode on top
, 732B, . . . are back electrodes 730C, ?, such as metal electrodes on the transparent conductive film. 32C, . . . are formed separately, forming a single type optical sensor chip 13.
After that, each single-type optical sensor chip 130 is cut into the minimum required volume from the semiconductor substrate 120 in process S3, and then the single-type optical sensor chip 130 is processed in process S4. optical sensor chips 130, 140. . . . are arranged at a predetermined distance of 1111, and the surface type &1730B, 732B.

...and back electrodes 730G, 732C, ...
...The Riet Frame Rolls added in a lattice pattern on the top are connected in a regular manner. By processing S5,
As shown in the figure, the surface of the single-type optical sensor chip +30 is coated with a resin fixing agent E1 and rolled, and then the lead frame DI is cut into a predetermined length.

It has a structure with two terminals: an arm side terminal Ll and an output voltage side terminal Ll. This results in one semiconductor substrate 1 as a whole.
A single type optical sensor element having a so-called integrated structure, which is integrally formed in step 201, is manufactured. In this case, the integrated structure is one in which the amorphous silicon layer that is the front electrode is not separated, but is formed on -2 substrates, and only the back electrodes 730G, 732C, . . . are separated. . These are single-type photosensor elements using amorphous silicon chips, with an amorphous layer of 1 gm.
This is because the amorphous layer is a single piece because it is extremely thin and there is almost no current leakage in the lateral direction, and the intensity of the input light can be detected according to the area of the electrode by separating the A-plane electrode. By the way, conventionally, amorphous silicon chips 730A, 732A, . . .
. . is used to form a single-type optical sensor element, the optical sensor elements are separated, and the optical sensor elements of adjacent chips in the divided poem (processing S3) become unknown. For this reason, it has been difficult or impossible to search for two similar or identical optical sensor elements with adjacent characteristics from a large number of separate sensor groups. or,
A single-crystal photosensor element manufactured using a different manufacturing process from the single-type photosensor element, such as the photosensor element using the above-mentioned amorphous silicon chip, has back and front electrodes for Ll and old terminals separated into so-called separate structures. was forming. This has resulted in the drawback that the manufacturing process is diverse and complex.

Figure 11 shows an outline of the optical sensor chip manufacturing process that has been improved in this respect, and the processing steps are almost the same as in the case of the single type optical sensor chip shown in Figure 1O, but from process S2 to process S5. In the process, unlike the conventional single type, two adjacent amorphous silicon chips 730
A and 732A are integrated as a pair to form a pair type optical sensor element 51G, and the back electrode 730 is used as a ground terminal L1 in common for chips 730A and 732A.

The optical sensor element 510 made of such a pair of chips can produce a particularly effective effect when comparing input light.

Next, a dual in-line hybrid tC provided in the control device 3 connected to the optical sensor element described above will be explained.

FIG. 12(A) is a perspective view showing the schematic structure of this dual in-line hybrid tC, in which a large number of circuits are conveniently arranged.
As shown in the figure, C200 has three primary colors RGB from the optical sensor elements 510A to 510G on the output side [0] of the upper end surface.
Output side terminals 9N-14N that output signal arithmetic processing results
The six pins are regularly arranged at predetermined intervals. Further, on the input side [I] of the lower end surface, the above-mentioned light receiving element 51 is provided.
Similarly, the 8 pins of input terminals (including ground) terminals IN to 8N for inputting the three primary color signals from 0A to 510G or for supplying power to the entire circuit, such as a DC power supply, maintain a predetermined interval. It has a regularly arranged external structure.

Under such an external structure, the dual in-line hybrid IC 200 of this invention divided into two systems is used as shown in FIGS. 12(B) and 12(C). FIG. 12(B) is a perspective view showing an example of the use of the input side [I], with dual in-line hybrid IC200A~
A plurality of 200Ds (four in this example) are arranged in a row horizontally and arranged in parallel so that the terminal numbers are the same. In this way, for each stage, for example, the terminal 1m of the first stage is connected to the DC power source DGI.

Terminal 2N of the second stage is the DCC power supply C2, terminal 3N of the third stage
is the operational reference voltage of the operational amplifier Dro 1st and 4th stage terminal 4N
is the operating reference voltage of the difference amplifier 002, the terminal 5 of the fifth stage
N is for ground EE, terminal 6N on the 6th stage is for color - 3 primary color red RR signal, terminal 7N on the 7th stage is for the CG signal, and terminal 8N on the 8th stage is for the BB signal. ing. As a result, four IC200A~2
The common terminal for each stage of 00D can be connected and disconnected via the connector with a flat cable that has been analyzed one color at a time, and the check terminal can be easily found in the event of a rough rC failure. This eliminates the hassle of conventional complicated wiring.

FIG. 12(C) is a perspective view showing an example of the use of the output side [01], and output terminals 9N to 1 which output the arithmetic processing results of the color-three primary color RGB signals from the light receiving elements 510A to 510C.
4% is connected to a color-analyzed flat cable 300 via a box-shaped connector 21G.

Therefore, the small-sized system is clearly divided into two systems on the I10 side.
Lightweight dual inline hybrid IC: 200
By applying this to the logical operational amplifier circuit of the above-described printed matter detection device, many advantages listed below will occur in terms of implementation. That is, (1) wiring is easy and there is no need for wiring, and (2) the packaging density is high and there is plenty of space. (3) No printed circuit board is required, and an inexpensive universal circuit board can be used. (4) Color - The distance between the photo sensor that detects the three primary color RGB signals and the board is the shortest,
During this time, the chances of noise mixing are reduced.

In the above embodiment, the two end faces of the hybrid IC are used to divide one end into an input side [I] (including power supply and ground) and the opposite end into an output side [0]. However, as shown in Figure 13, in order to improve the heat dissipation effect, three end faces are used, and the input side [I], the output side [0], and the power side [D[:3] are connected to make wiring easier. It is also possible to divide it into two parts, and the vacant end faces can be used to the extent permitted by implementation.

FIG. 14 shows the above-described hybrid IC 200 arranged on a universal board 331 for each RGB to perform the above-described print detection, and a connector 333 is connected to the upper lead wire 332 of the hybrid IC 200. , and a flat cable 334 is further connected. In addition, the Vibelift IC20O is used for the above-mentioned A side and B side.
The lead wire at the other end of the hybrid [:200] is connected to an optical sensor 510 element provided on a fixing jig 335, and an optical fiber 337 is connected to the optical sensor element 510. There is.

Next, the first operation is to detect printing defects on printed matter using this dual inline hybrid IC and optical sensor element.
This will be explained with reference to FIGS. 5(A) and 5(B). As described above, the optical sensor element and dual in-line hybrid IC are provided in the control 9223, and the light detected by the printing defect detection sensor heads 2A and 2B as described above is transmitted to the optical fiber layer JR-JB. are input to the light receiving elements 510A, 510fl, 510[: through
This light-receiving Sakuko 5! The output signals from OA~510C are appropriately gain-adjusted for each color by the amplifier 318 in the dual in-line hybrid IC 200, and their output voltages become RA, GA, BA, CB, and BB and are sent to the differential amplifier 317. is input. Here, for example, since A and B of the light receiving element 510A are located on the same pattern, if the pattern is normal, their outputs are all equal and are the subtractor outputs (RA-RB), (GO- GO)
and (BA-BB) should all be zero. However, since it is physically impossible for them to be exactly equal, the values are set in advance within the permissible range, and in Figure 15 (A), the upper limits are set as RCmaz' and GCm.
ax and BCmax, and the lower limit Rcmin.

GCmin and Begin, comparator 318
is input together with the output of the differential amplifier 317. If ink is scattered on one of the patterns, and this is detected by the light receiving element 510A, for example, the output voltage of RA and the output voltage on the 2nd will naturally be different, and the degree of this ink scattering will be within the set tolerance range. If it exceeds comparator 3
The output of 18 becomes ``NO'', and a 1, for example, 1'' signal is output to indicate an error.If it is within half of the upper and lower limits, it is a good item, ``GO'', and a 0 signal is output, indicating that the pattern is not correct. This means that defects can be detected at high speed.

(Modified example of the invention) The position adjustment device explained in l-4 Fig. 1 will be explained below.
You may also do this.

FIGS. 16(A) and 16(B) show another embodiment of the position adjustment device described in -H, and the position 21:A shown in FIG. 1(A) is
Corresponding to the adjustment device 20B, the same figure (A) is a schematic front view.

Figure (B) is a schematic right side view.

In the figure, position adjustment #ff1to is performed by a71 on blocks 42 and 42 fixed to both ends of the upper surface of channel 41.
1 Saleta XY Stay'; 43.43, XYX
Z stage 48.4B placed at take 43°43
, further comprising a support plate 60 movably attached to the top surface of the Z stage 48.48 and support members 81, 81, 81 connected vertically to the support plate 80, A sensor head 2B for detecting printing defects is placed at the bottom.
Distance detectors $188 and 18B are attached to both ends in the longitudinal direction. In addition, the channel 41 is fixed to the frame T0.70 of a printing machine or a rewinding machine, and the frame 7
A fixed roll 8B is rotatably attached to 0.70.

The XY stage 43 is determined by a micrometer 44 so that the stage surface 45 is in the horizontal direction and in the axial direction of the fixed roll 6B (
micrometer 4B).
As a result, the stage surface 47 moves horizontally in a direction perpendicular to the axial direction of the fixed roll 8B (hereinafter referred to as the "Y direction"). A stage 50 of the Z stage 48 is moved in the vertical direction (hereinafter referred to as "Z direction") by a micrometer 49. Therefore, by operating the micrometers 4B and 49, both ends of the printing defect detection sensor head 2B are independently moved in the Y direction and the Z direction, respectively, and the distance detectors 18B attached to both ends of the detection unit 2B are moved independently. ,1
Display by 8B! Based on the position t shown in 3, the printing defect detection sensor head 2B can be positioned at the top of the circumferential surface of the fixed roll 6B with a predetermined gap. Note that the movement of the detection unit 2B by the micrometer 44 in the X direction is performed to adjust the range in which defects in printed matter are detected.

Further, the shape of the sub-roll of the above-mentioned positioning mechanism may be explained below.

FIG. 17 shows an outline of this positioning mechanism,
In this example, the cross-sectional shapes of the sub rolls 27^° and 27B° are each elliptical, and the sub rolls 27A° and 27B° are structured to be able to rotate independently.

By rotating this sub roll 27A' or 27B°, the inclination and height of the main roll 2B placed thereon from the reference plane lOO can be adjusted to any desired value, so that printing defects can be avoided. The detection sensor head 2B is placed on the reference plane 1.
It is possible to position with a height and inclination of α relative to 00.

Further, the method for detecting the printing press register mark of the above-mentioned printed matter may be explained below.

FIG. 18(^) shows the appearance of the continuous printed matter used in this method. On the outside of the printing margin of this continuous printed matter 111, one printing machine register is placed between the pitches CP2, which are three times the printing pitch of the picture. A Markle stomach, a B degree check mark NM, and a misalignment check mark ZM are printed, and a register mark M is printed at the corner of each picture. The printing pattern is continuously and repeatedly printed at the pitch CP2 over the entire sheet length of this continuous printed matter 111. Here, when scanning the area outside this printing area, this printing press register mark PM and other marks NN, Z)I are detected, as shown in FIG. 18(B). It is not possible to detect the mechanical register mark PM, so the corner of the pattern is scanned to detect the register mark M and count the number, and for each pitch CP where the counted number is an integral multiple of 3. If you scan the area outside the printing area above, the printing press register mark PM will be detected in synchronization with this detection signal, distinguishing it from other marks. Therefore, from now on, only the target printing press register mark PM can be detected accurately.

Here, we will refer to the essential block configuration diagram of one means for implementing this method in Fig. 18, the diagrams showing register mark synchronization detection characteristics in Figs. 20 (A) to (F), and the above-mentioned Fig. 1 (^). This method will be described below with reference to.

As shown in FIG. 1, in this method of synchronously conveying continuous printed matter, the continuously printed printed matter W (here, printed matter 111 is shown) is transported in the same manner as described above.

It is designed to be driven and transported. In the middle of this conveyance path, as described above, a register mark scanning head 5C and two sets of register mark number scanning radars 5A and 5B for printing presses are arranged. The above-mentioned two sets of printing press register marks--scanning radars 5A and 5B are adapted to detect in synchronization in correspondence with the marks C12 and C22, as described above. The main part of this control device 7 has a built-in counter 113 and a gate circuit 114 as shown in FIG. , C is 3"), and this counter 113 is designed to read this data from this memory when necessary. Therefore, first, the register mark PMI for the printing press and the corner of the pattern are entered outside the printing area of the pattern. When printing defect detection starts from the pattern P24 on which the register mark M24 is printed, the register mark scanning head 5C reads the register mark M24 and sends one pulse signal to the counter 113, as shown in FIG. Feed, sequentially to M25.2
B, M31. M32. M33. M41. ...and sends one pulse signal each time it is read. The counter 113 counts this number of pulses, and the number is the above C (= ``3'').
Each time the register mark/scanning head 5G and the printing press register mark Φ scanning head 5A are arranged so as to be synchronized as described above, the register mark/scanning head 5G for the printing press In order to predict and detect that the printing press register mark PM has arrived at ^ and read this printing press register mark PM, the gate signal O5 is activated.
is sent to the gate circuit 1!4, and in synchronization with this gate signal GS, the printing machine register mark Φ scanning rads 5^ and 5B scan the above printing margin, and as shown in FIGS. 20(E) and (C). ), only the line segment of one color of the printing press registration mark PM that is synchronized with this gate signal can be detected. That is, i20 diagram (A), (
As shown in B), (F) and CD), when this register mark scanning head/F5Ch<51 mark M41 is read, the gate signal GS is output as described above.
2 to the gate circuit 114, and upon receiving this gate signal GS2, the gate circuit 114 prints the second printing press register mark P 1 and PH1 on the two sets of printing press register mark scanning heads 5A and 5B. marked 0
12 and 022 to be detected synchronously. Therefore, if these two sets of marks 012 and C22 can be detected synchronously, these two patterns P! ! and P2
A control unit (not shown) determines whether the conveyance pitches of H are synchronized. Here, as shown in the enlarged view of FIG. 18CD), the gate signal GS has a time width corresponding to the width of the register mark M, and the register mark P for the printing press
Since it has a time width that corresponds to a width that is thicker than the line segments of each color of M and narrower than the pitch of each line segment, this 2!
[This means that marks C12 and C22 of I can be detected synchronously.

-・The above marks C]2 and C detected by these two sets of printing press register marks and scanning rads 5^ and 5B
22 are misaligned as described above and cannot be detected synchronously, move the L moving roll 9 shown in FIG. By adjusting the sheet length between and 5B,
These two sets of printing machine register marks/scanning RAD 5
A and 5B can detect the marks C12 and C22 synchronously, and the conveyance pinch of the image of this printed matter 111 is synchronized with the arrangement pitch of these two sets of register mark skiing/yanning heads 5A and 5B for the printing press. It can be done.

Next, another embodiment of this printing defect detection device will be described.

The printing defect detection apparatus of this embodiment is constructed from the apparatus described in the above-mentioned embodiments, but differs in the parts described below.

(1') Positioning mechanism of the position adjustment device.

(2) Method for detecting printing machine marks on printed matter.

Sensor head for detecting print defects.

@Printing defect detection circuit.

The details will be explained below.

1. Position 2 Mechanism for determining the position of the adjustment device.

In the above, the sub rollers were a pair of parallel rollers, but here they are elliptical rolls as shown in Fig. 17, which were explained in the above modification, and as mentioned above, each sub roller can be operated independently. By rotating, the main roll is positioned.

2. Method for detecting register marks for printing presses on printed matter.

In the above, the register mark for printing defect detection is detected based on detecting the register mark for synchronization on the printed material with the register mark scanning head for synchronization, and the register mark for printing machine is detected by two sets of register scan heads for printing press. However, as described in the above modification, the synchronous register mark scanning head detects and counts the synchronous register marks, and when the count reaches the set value, the printing press register is set. A mark scanning head is used to detect the register marks for the printing press.

3. Sensor head for detecting print defects This sensor head for detecting print defects uses a structure as described below.

This printing defect detection sensor head is equipped with a plurality of light emitting light sources serving as light emitting means, and a band-shaped metal spacer is sandwiched between the light emitting optical fiber layer and the light receiving optical fiber layer. The optical fiber layer is connected to the optical sensor element in the order of red, green, and 1\ color so that they can be detected, and the light source for projection is dimmed to keep the output level of the optical sensor element within the saturation level. . The details of this print defect detection sensor head will be explained below.

In this print defect detection sensor head, the sensor head is constructed of optical fibers as described above, and further includes light receiving optical fibers 511 to 511 of FIG. 7(A).
A metal plate is sandwiched as a spacer between adjacent portions of the optical fibers 513 and the light emitting optical fibers 514A to 514D to separate the light receiving part and the light emitting part, so that the respective optical fibers do not affect each other. This also facilitates the production of a three-sensor head. Here,
Figure 21 shows the light source (halogen lamp) voltage 1tE (DO-V).
) and the optical sensor element (amorphous silicon element) output 'pressure (mV).
, B indicate the output voltage characteristics of the optical sensor element (200KΩ load) corresponding to red (R), green (G), and blue (B), respectively.

In the embodiment described above, the light source is one halogen lamp 51
Since color (R, G, B) lighting was performed in 7, the second
Although the characteristics of the optical sensor element did not improve as shown in Figure 1,
The sensor head of this embodiment uses a plurality of halogen lamps to improve the output level characteristics of the optical sensor element. Furthermore, a light receiving optical fiber 511
~513 is red, green, i! as above. They are arranged in the order of i-color detection to receive light, but in this embodiment, the light emitting optical fibers 5!4A to 5140
Multiple light sources are used (e.g.

514A to 514D (one for each of them is now four), and the output of the optical sensor element is adjusted to be within the saturation level by changing the voltage of each light source. In such mX&, defects in printed matter can be detected in the same manner as described above.

The signal detected in this way is transmitted to the optical fiber 4.
．． 4 to the control device 3;
This electric signal is converted into an electric signal by 0A~s toe, and this electric signal is detected by the printing defect circuit consisting of an amplifier, a differential amplifier, and a comparator similar to the dual in-line hybrid IC described above. It is designed to detect.

(Modified example of the invention) - In the print defect detection sensor head of the above-described embodiment, when there are two light sources for projecting a plurality of lights, red and blue are detected by respective independent light sources projecting light, For green detection, light is emitted from the light source used for red and blue detection, and if the output levels of the optical elements are extremely different, the amplification of the multiple amplifiers installed in the defect detection circuit described above must be adjusted. The details of this may be described below.

This print defect detection sensor head 550 is made of the same material as that described in the above embodiment, and the halogen lamps 517 and 551, which are the light sources of the light emitting optical fibers 514A to 5140 to be described later, are 517 and 517, respectively. is 51
4A and 514B, 551 emits light corresponding to 5140° and 5140, and 514A and 514B are red,
5148 and 514C are green light, and 514G and 5140 are light emitting light seven eyepers that emit light for detecting blue color, and color detection is performed as described above.

A sensor head 550 having such a configuration is shown in FIG. 22(A).
Two sets of sensor heads 550A and 550B as shown in
As shown in FIG. 22(B), the end face on the printing surface side is formed, and the sensor head 550A, 5 is used with its longitudinal direction aligned in the width direction perpendicular to the flow direction of the sheet.
50B light emitting optical fibers 514A to 5140 are 514
A, 514B are bundled by the condenser 51B, 514G,
In the case of 51411, the light beams are bundled in a light condensing section 553.

The light condensing parts 518 and 553 are bundled in a circular shape so that the respective light emitting optical fiber layers are weighed against each other as shown in FIG. It is constructed on a uniform plane. The halogen lamp 517 and the heat shielding plate 5111 are provided on the end face of the 5-light part 51B as described above, and the halogen lamp 551 and the 8-line shielding plate 552 are provided on the end face of the condensing part 553 as described above. ing.

The light beams from the light projection optical fibers 514^ to 5!40 are irradiated onto the printed matter 508 as described above. Further, each of the light-receiving optical fibers 511 to 513 is made of the above-mentioned material, so that even minute printing defects can be accurately identified as described above. On the other hand, two sets of sensor heads 5
50A, 550B light receiving fiber layer JRIJG, J8
The terminal ends of the light-receiving elements 510A and 510A are connected to each other as described above.
, 510B, 510C4: connected, and changes in each color (R, G, B) received as described above are detected by the light receiving element 510.
^, 510B, 510C are converted into electrical signals by the optical sensor elements 510, and these electrical signals are used for each color (R, G, B
) corresponding to two sets of blocks 540A and 540B described later.
The data are collected and sent to the control device 3.

Figure 23 shows this ILW outfit! ! 3 is a circuit diagram of a defect detection circuit provided in block 540 of the light receiving element described above.
A, 540B has an additional amplification section 31B for each color @Base 531
53B are connected, and the amplifiers 531 to 53B are provided with polygons 531A to 536A for adjusting the amplification degree. The amplifier section 31B has a differential increase@! as described above. 31
? is connected to the differential amplifier 317, and the comparator 318 is connected to the differential amplifier 317 as described above. The detection operation of this printing defect detection sensor head in such a configuration will be explained.

As explained in FIG. 7, a pattern is printed on the printed matter 508, and the sensor head 550A provided in the -A section,
When the pattern is irradiated with light from the halogen lamps 517 and 551 from the halogen lamps 517 and 551 through the light emitting optical fibers 514A to 5140, the reflected light is received by the light receiving optical fibers 511 to 513 as described above. In this way, the light sensor elements in the light receiving elements 51 (IA to 51OC) exchange the signals into electrical signals, and the signals are sent to each block 540A.
, 540B, the amplifiers 531 to 53B of the defect detection circuit
sent to. Here, the signal sent to the amplifier is obtained by adjusting the current value of the halogen lamp 517.551 for each color (
The output characteristics for R, G, B) are adjusted to be within the comfortable level, but if the output levels of the optical sensor elements are extremely different even with this operation, it is necessary to set the The amplification degree of the amplifiers 531-536 is j! The signals (RA, GA, BA, RB, CB, 8B) amplified by the amplifiers 531 to 530 are input to the differential amplifier 317 as described above.
sends a signal to comparator 318 as described above;
1- Printing defects are detected as described above. Further, the secondary light receiving section of the above-described print defect detection sensor head may be used as an integrated optical sensor element as described below.

FIG. 24(A) is a schematic structural diagram of this print defect detection sensor head, and this print defect detection sensor head 40
7, a light-emitting element 402 such as a light-emitting diode is arranged in a donut shape around a circular light-receiving element (for example, a photodiode) 401 shown in FIG. It consists of a bundle of optical sensor elements 405 made up of optical sensors. This optical sensor head 40
7 for each row (401st depending on the size of the detection surface 403)
1 for example, Color-31rX Color R
1ReR among (red), G(ri), and B(blue).

It has a structure in which a large number of photosensor elements 405 are regularly arranged, with G in the middle row and B in the C row, each detecting each color. In addition, each optical sensor element F405 is detachably fixed, and fixing jigs 411 to 4In are arranged in stripes at predetermined intervals so that each surface is aligned and has a smooth light-receiving surface, and the front surfaces are aligned. Then, fix the entire head with Jii adhesive or the like. Then, as shown in FIG.
The structure is such that they work together properly without interfering with each other. Furthermore, a sensor head 40 for detecting printing defects
7, there is a signal output lead @LL2.7 from the common terminal of each optical sensor element f405. HH2 and power supply lead wires LLI and HH1 are connected and installed.

Under such a configuration, the print defect detection sensor head 407 is used as shown in FIG.
3, and when power is supplied from terminals LLI and MHI, the light emitting elements 402 of the photosensor elements 405 in each stage uniformly emit light in colors corresponding to RGB. The light emitted from the light emitting elements 402 of the photosensor elements 405 in each stage is completely irradiated onto the detection surface 403 (areas AA1 and AA2), and the light emitted from the light-receiving elements 401 of the photosensor elements 405 corresponding to RGB in each stage is emitted. Light in area AA3 is focused. In this way, the concentration of the detection surface 403 is accurately measured, and the corresponding output current is obtained from the terminals HH2 and LL2 of the optical sensor head.

In this case, the color information of the detected blood 403 is obtained by dividing the emitted light color of each stage of the optical sensor element 405 of the print defect detection sensor head 407 into RGB 403 colors and measuring the density of each color corresponding to each stage. can be obtained.

FIG. 25(A) is a schematic structural diagram showing another modification,
The configuration of the optical sensor head 408 for detecting print defects is made into a module in which a plurality of (six in this example) light emitting elements 421 to 42B are arranged around a circular light receiving element 401 shown in FIG. It consists of a photosensor element bundle of photosensor elements 406 configured so that the secondary light receiving portion is integrated. This printing defect detection sensor head 408 has three primary colors R (red), G (green), three primary colors, R (red), G (green),
The upper row of B (blue) is R9, the middle row is G, and the lower row is B, and the structure is such that optical sensor elements f408 for detecting each color are regularly arranged.

In addition, fixing jigs 411 to 41n are used to fix each optical sensor element 40B and to make sure that each surface is aligned and has a smooth light-receiving surface.
are arranged in stripes at predetermined intervals, and as shown in FIG. It becomes. Furthermore, lead wires LL2 and HI3 for signal output and lead wires LLI and HHI for overlapping supply are connected and attached to the back surface of the print defect detection sensor head from the common terminal of the optical sensor element 406.

With this configuration, the print defect detection sensor head 40
The sensor head 8 is used as shown in FIG. That is, when the print defect detection sensor head 408 is placed in close contact with the detection surface 403 and power is supplied from the terminals LLI and H, the light emitting colors corresponding to RGB are emitted from the photosensor elements 406 in each stage.
Light is emitted uniformly from the light emitting elements 421 to 426. The light emitted from the light emitting elements 421 to 428 of the photosensor elements 40B in each stage is irradiated all over the detection surface 403 (areas AAI and AA2), and the light is received by the photosensor elements 406 corresponding to RGB in each stage. Light in area AA3 is focused on element 401. A corresponding output current is thus obtained from the terminals H)12, LL2 of the optical sensor head. In this case, the color information of the detection surface 403 can be obtained by dividing the emitted light color of each stage of the optical sensor element 406 of the optical sensor 8 into RGB colors and measuring the density of each color corresponding to each stage. .

In the above two examples, only the same type of optical sensor elements 405 and 40G used in the print defect detection sensor heads 407 and 408 are used, and the fixing jig 411-
41! However, in consideration of correspondence with the detection surface 403 of printed matter, for example, the first row is the optical sensor element 405, the second row is the optical sensor element 40B, and the third row is the optical sensor element 405. Elements 405, . . . , different types of optical sensor elements 405 and 40B may be alternately provided in each column.

It is also possible to package the print defect detection sensor heads 407 and 408 so that even if one of the optical sensor elements 405 and 406 breaks down, it can be easily replaced with another optical sensor element with a single touch. Furthermore, the above 2
In one example, print defect detection sensor heads 407 and 40
Fixing jigs 411 to 4In for fixing the optical sensor elements 405 and 406 used in 8 are regularly arranged in a vertical stripe shape.
It is also possible to arrange them regularly in a cross-shaped stripe shape within a range that does not affect the light emitted and received by the light emitting device 6.

Two sets of such print defect detection sensor heads are arranged as described above, and are connected to the print defect detection sensor heads 2A and 2.
It is set in the above-mentioned apparatus as a substitute for B, and is used by being connected to the above-mentioned print detection circuit.

In addition, a capacitor, a photocoupler, and a switch (f-fl) for switching the operation of the photocoupler are provided between the differential amplifier and the comparator of the above-mentioned printing defect detection circuit to prevent displacement caused by deterioration of the optical sensor element or drift of the amplifier. (malfunctions, etc.) may be adjusted.

FIG. 2B is a circuit diagram of this defect detection circuit, which includes the above-mentioned optical sensor element blocks 540A and 540B, the above-mentioned amplifier 31B, the above-mentioned differential amplifier 3317, the above-mentioned comparator 31B, and this differential Setting/detection switching circuit 80 inserted between the amplifier and this comparator 318
It consists of 0. This setting/detection switching circuit 900
As shown in FIG. 27, the switching circuit 900 is connected to the capacitors CR, CG, and CB for detecting the amount of change for each color of R, G, and B at the time of initial setting, and the capacitors CR, CG, and CB are connected to each other at the time of initial setting. It is composed of photocouplers 991A, 991B, and 991C for connecting CG and CB, a DC power supply BT, a switch 5ill, and a circuit resistor RE for simultaneously switching and operating the photocouplers 991A, 911B, and 9910. put it here,
These photocouplers 991A, 991B and 991C are
As is well known, light emitting diodes OR, DG and OR,
The phototransistors R, TO and TO are integrated into Ml.
The light emitting diodes OR, D
When C and DB are energized, phototransistors TR and TO
and TB are in a conductive state, and have a switching function so that when the energization is canceled, the conductive state is canceled and the transistors become non-conductive. Therefore, first, the above switch Sw
The R, G, and B color setting/detection switching circuits are made conductive at the same time through the photocouplers 991A, 991B, and 9θ IC, and the initial setting (gain gain) of each R, G, and B detection circuit is made conductive as described above. adjustment), then open the switch S- to release the conduction state of L, and then
, G, and B by connecting the capacitors OR, CG, and CO to the detection circuits for each color, printing defect detection can be executed from now on.

Here, all of the plurality of photocouplers used in the printing defect detection circuit are connected in parallel as described in L (not shown), and all of the plurality of photocouplers are operated. All the photocouplers can be switched simultaneously by simply operating one set of DC power supplies and switches connected to the print defect detection circuit, and the initial setting state and operating state of this printing defect detection circuit can be changed.

(Effects of the Invention) As described above, according to the printing defect detection device of the present invention, the sensor head for printing defect detection can be easily set at a position where printing defects of printed matter can be easily detected, and the printing defect detection By performing color photometry using a sensor head, it is possible to automatically and accurately detect printing defects at low cost and with a small device.

[Brief explanation of drawings]

FIG. 1(A) is a schematic front view of a printing defect detection device showing one embodiment of the present invention, and FIG. 1(B) is a configuration diagram of a position adjustment device showing one embodiment of the present invention. 2 to 4 are views showing a positioning mechanism showing an embodiment of the present invention, FIG. 5(A) is a view showing the appearance of a sheet of printed matter, and FIGS. Figure 6 (A) to (H)
is a timing chart showing how continuous printed matter is detected,
FIG. 5(D) is an enlarged view of the printed matter, FIG. 7(A) is an external view of the sensor head for detecting print defects, FIG. 7(B) is a diagram showing color detection in the optical fiber layer, and FIG. Figure 8 (A)-(C
) is a configuration diagram of the sensor head for printing defect detection, and Fig. 9 (A
). (B) is a diagram explaining the photometric characteristics of the light-receiving optical fiber layer,
Figure 1θ is a diagram showing the manufacturing process of a single type optical sensor chip, Figure 11 is a diagram showing the manufacturing process of a pair type optical sensor chip, and Figures 12 (A) to (G) are dual inline type hybrid ICs. Figure 13 is a diagram showing the exterior appearance of another hybrid IC, Figure 14 is a diagram showing how to implement a dual inline type hybrid IC, and Figure 15 is a diagram showing a dual inline type hybrid IC installed in a control device. Internal configuration diagram of hybrid IC, Figure 16 (^)
, CB) is a diagram showing another aspect of the positioning device, FIG. 17 is a diagram showing another positioning mechanism, FIG. 18(A) is a diagram showing the appearance of a printed sheet, FIG. 18(B), ( C) and FIGS. 20(A) to (F) are timing charts showing how continuous printed matter is detected, FIG. 18(D) is an enlarged view of the printed matter, FIG. 18 is a block diagram of the control circuit, and FIG. 22 shows the output characteristics of the optical sensor element, FIGS. 22A to 22C are configuration diagrams of other printing defect detection devices, and FIG. 24 (A) to (C) are diagrams showing the structure of a print defect detection sensor head with integrated light emitting and receiving parts, and FIGS. 25 (A) to (C) are diagrams showing the print defect detection sensor head shown in FIG. 25. 26 is a diagram showing another aspect of the defect detection circuit, FIG. 27 is a diagram showing details of the switch f stage in FIG. 26, and FIG. 28 (A), (
B) is a diagram showing a conventional defect detection device. 2A, 28,407,408...sensor head for detecting printing defects, 4,511-513,414A-514D
...Optical fiber, 5A to 5B...Mark detection device,
5C...Mark detector, GA, 8B...Fixed roller, 3,7,403...Control device, 9...DC motor, 18A, 18B...Distance detector, 19...Display device, 20A, 20B... position adjustment device, 26...
10-le, 2? A, 27A', 27B, 27B'...
・Auxiliary roll, 111,509...Printed matter, 113・
...Counter, 114...Gate circuit. 200...Dual inline hybrid IC1
31B... Multiplier, 317... Differential amplifier, 318
... Comparator, 130, 510, 510A ~ 51
0G...light receiving element, 517.551...halogen lamp. Applicant's agent Yuzo Yasugata (A) Tea l Picture tea 2 Picture 3 Picture 4 Troublesome 13 ≦ A side B term + 1 (A) Jin 16 Picture CB CB > 1st σ Picture i $17 Picture Akira 19 g 2nd o rA (B) CC) (B) Half 26 Figure 27th (B) 0 Easy 281 Procedural Amendment (Method) % Formula % 2 Name of Invention Printing Defect Detection Device 3.1 Personnel who do Sanno f Relationship with '1 Patent applicant (2891 Dainichi Printing Co., Ltd. 4 Agent 5, Date of amendment order June 4, 1986 (Despatch date June 24, 1986) 6. Subject of amendment "Drawing "Brief explanation" column

Claims (8)

[Claims] (1) In a device that uses color photometry to detect defects in printed matter conveyed by a pair of fixed rolls and a moving roll provided between the pair of fixed rolls, (a) Optically detects printing defects in the printed matter; (b) a pair of print defect detection sensor heads provided close to the circumferential surfaces of the pair of fixed rolls so as to read and detect; (b) each of the print defect detection sensor heads attached to the pair of print defect detection sensor heads; a distance detector that detects each distance in the horizontal and vertical directions of the print defect detection sensor head with respect to the pair of fixed rolls; (c) an indicator that displays the distance detected by the distance detector; (d) ) a position adjustment device for moving the print defect detection sensor head in the horizontal and vertical directions; a pair of sub rolls arranged in parallel provided within the position adjustment device; and the print defect detection sensor head. and a main roll placed perpendicularly to each of the sub rolls, each of the sub rolls being able to move up and down independently and swinging the sensor head for detecting printing defects. (e) a moving device that moves the movable roll in the vertical direction; and (f) a positioning mechanism that is provided near the surface of each of the pair of fixed rolls and that is configured to print on the printed matter. (g) a pair of mark detectors that detect a register mark for synchronization and a register mark for printing defect detection printed on the printed material; The pair of mark detection devices are connected to a mark detection device and the mark detector, and the mark detector detects only the printing defect detection register mark based on the detection of the synchronization registration mark, and the pair of mark detection devices a control device that controls the moving device so as to be able to detect register marks for a printing press; (j) a plurality of optical fibers formed in layers adjacent to each of the light emitting optical fiber layers, each end of which is connected to the print defect detection sensor head; (k) each other end of the light receiving optical fiber layer is used as an input, and two adjacent single type photosensor chips on a semiconductor substrate are not divided; a photosensor element consisting of a pair of photosensor chips, (l) an amplifier with the output of this photosensor element as input;
Consisting of a differential amplifier connected to this amplifier, and a comparator that detects printing defects on printed matter by inputting the output of this differential amplifier and a set voltage that serves as a reference for detecting printing defects on printed matter in advance. 1. A printing defect detection device comprising a dual in-line hybrid IC in which lead wire terminals are divided and arranged in a plurality of input and output directions to facilitate mounting and wiring. (2) The pair of sub rolls provided in the positioning mechanism have an elliptical cross section, and each of the sub rolls can be rotated independently. The printing defect detection device described. (3) The mark detector detects and counts the synchronization register mark, and when the count reaches a preset value, the printing press register mark is detected. The printing defect detection device according to scope 1. (4) In a device that uses color photometry to detect defects in printed matter conveyed by a pair of fixed rolls and a moving roll provided between the pair of fixed rolls, (a) optically detects printing defects in the printed matter; (b) a pair of print defect detection sensor heads provided close to the circumferential surfaces of the pair of fixed rolls so as to read and detect; (b) each of the print defect detection sensor heads attached to the pair of print defect detection sensor heads; a distance detector that detects each distance in the horizontal and vertical directions of the print defect detection sensor head with respect to the pair of fixed rolls; (c) an indicator that displays the distance detected by the distance detector; (d) ) a position adjustment device for moving the print defect detection sensor head in horizontal and vertical directions; a pair of parallel sub-rolls each having an elliptical cross section provided within the position adjustment device; (e) a positioning mechanism comprising a vertically installed sensor head for detecting defects and a main roll placed orthogonally to each of the sub rolls, so that each of the sub rolls can rotate independently; a moving device that moves the movable roll in the vertical direction; (f) a pair of mark detection devices that are provided near the surface of each of the pair of fixed rolls and that detect a printing press register mark printed on the printed material; (g) a mark detector that detects a synchronization register mark printed on the printed material; (h) a mark detector connected to the pair of mark detection devices and the mark detector, and the mark detector detects the synchronization register mark; a control device that detects and counts and controls the moving device so that the pair of mark detection devices can detect the printing press register mark when the count reaches a preset value; i) a plurality of light emitting optical fiber layers formed in layers using a plurality of optical fibers, each end of which is bundled with the sensor head for detecting printing defects; (h) a plurality of optical fibers using a plurality of optical fibers; (k) a plurality of sets of light-receiving optical fiber layers formed in layers and having one end of each bundled to the print defect detection sensor head so as to be adjacent to each of the light-emitting optical fiber layers; (k) the light-receiving optical fiber layers; red for each other end of the fiber optic layer,
An optical sensor element that inputs green and blue in that order, and is composed of a pair type optical sensor chip in which two adjacent single type optical sensor chips on a semiconductor substrate are made into a set without being divided; (l) a plurality of sets of light projecting means configured to project light onto the plurality of sets of light projecting optical fiber layers to bring the output of the optical sensor element within a saturation level; (m) a plurality of sets of light projecting optical fiber layers; a strip-shaped spacer sandwiched between the optical fiber layer and the plurality of light-receiving optical fiber layers; (n) an amplifier inputting the output of the photosensor element;
A differential amplifier connected to this amplifier, and a comparator that detects printing defects on the printed material by inputting the output of the differential amplifier and a set voltage that is a reference for detecting printing defects on the printed material in advance. What is claimed is: 1. A printing defect detection device comprising: a defect detection circuit configured as shown in FIG. (5) The sensor head for detecting printing defects is composed of a bundle of optical sensor elements with an integrated light emitting and receiving part, and the front surface of the bundle of optical sensor elements does not affect the light emission and reception of the bundle of optical sensor elements. The parts are fixed using regularly arranged fixing jigs to maintain a predetermined distance between the sensor head surface and the detected surface, and
The printing defect detection device according to claim 4, which can be used as a light sensor element integrated with a light emitting and receiving part with matching characteristics. (6) If the output levels of each of the optical sensor elements to be input to the defect detection circuit are extremely different even in the dimming of the light projecting means, the amplification degree of the plurality of amplifiers provided in the defect detection circuit is changed. The printing defect detection device according to claim 4, wherein the printing defect detection device can be adjusted by adjusting the print defect detection device. (7) The light emitting means of the sensor head for printing defect detection is set to 2.
one for emitting light to the light emitting optical fiber layer disposed at both ends of the light receiving optical fiber layer corresponding to red;
The other is to project light to the light emitting optical fiber layer disposed at both ends of the light receiving optical fiber layer corresponding to blue, and the red light to both ends of the light receiving optical fiber layer corresponding to green. Light is emitted from one of the corresponding light receiving optical fiber layers and one of the light emitting optical fiber layers disposed at both ends of the light receiving optical fiber layer corresponding to the blue color. The printing defect detection device according to item 4. (8) A pair of capacitors and a photocoupler connected in parallel between the differential amplifier and the comparator of the defect detection circuit, and one switch means for simultaneously switching the operations of the plurality of photocouplers. A printing defect detection device according to claim 4, wherein the printing defect detection device is provided.