JPS5847756A - Monitoring device for incorrect collating - Google Patents

Abstract

PURPOSE:To detect the incorrect collating regardless of the kind of printed material by storing the signal of the paper surface at a lowest stage of a standard section in a memory, then storing the signal of the paper surface of the lowest stage of a monitoring section in another memory, comparing the signals, thereby judging whether the paper surfaces are the same or not. CONSTITUTION:The paper surface of the lowest stage of the standard section, which is mounted on a section mounting table, is measured by one of a plurality of light sensors 1, and the result is stored in a standard memory 15 through an AD converter 13. Then, the paper surface of the lowest stage of the monitoring set is measured and the result is separately stored in a plurality of monitoring membories 16 after AD conversion, Thereafter the plurality of the monitoring memories 16 are sequentially read out for position compensation of the monitoring section. Constants are added to the addresses, addition and subtraction as well as read out are performed. When the difference in contents of the read out monitoring memory and standard memory exceeds a fault level of a setting device 32, the number is stored in a fault rate detector 51, and the number of the fault signal and number of measuring points are compared with each other. Thus the incorrect collating is monitored.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a misprint monitoring device that monitors misprints that occur during the bookbinding process.

Conventional misprinted WM visual scissors stamp a mark such as a spine on the back of the signature, and use a photoelectric element to detect -2- (＼7-) to identify whether it is a normal fold or not. However, with this conventional binding Wj1(-), the backing label must be printed on fold 1, and depending on the printed matter, the backing mark may be placed in the 1st position or the backing mark may be placed in the 1st position, so depending on the printed matter being handled, The position of the sign detector had to be adjusted.

In addition, since the printing paper is folded using a machine, there may be uneven folding and misalignment compared to conventional F-folding, and the paper may be folded in and erased. malfunctioned or stopped1.

If the folding T is placed misaligned on the stacking table (hereinafter simply referred to as the frame), the conventional misaligned page monitoring device cannot correct the positional misalignment. In many cases, it was determined to be defective.

From k rice to general printed matter, it was done as follows. First, light is shined onto a stack of paper for standard printed matter, and the state of the reflected light is converted into an electrical signal.Next, this is compared with the electrical signal from the paper surface to be monitored. or whether it was a different species.

This can be further divided into: There are types that place optical sensors at several points on the surface of the paper and capture signals by fixing the surface of the paper, static types that capture the entire image like a television camera, and types that measure the light within a certain zone of the surface of the paper by moving the sensor and the surface of the paper. It is a dynamic model that extracts changes in as a signal. However, all of these require a considerable range of sensitivity in the comparison circuit, and some printed matter may lack detection sensitivity and cannot be discriminated. -For example, it can be said that it is quite difficult to distinguish between literary books where the printed characters are arranged in the same way.

The object of the present invention is to solve the above-mentioned drawbacks of the prior art, to detect and eliminate misaligned pages regardless of the type of printed matter and the presence or absence of a spine label, and to correct misaligned pages. -4- The aim is to provide a 5m1 space.

The misprint monitoring device of the present invention first stores the signal of the bottom nine sheets of the standard fold ■ in a memory, then stores the signal of the bottom sheet of the monitor fold in another memory, and compares the two. to determine if the paper is different.

The misprint monitoring device of the present invention needs to measure a large number of paper improvement points. For this reason, continuous electricity from the optical sensor is time-divided as described later to provide a large number of measurement points. The measurement begins as soon as the signature moves over the frame and continues until the signature is removed from the frame.

However, this comparison was simply made as E(t)-E-(t)-0 (E <t>'<1 signal of the standard paper, E"(t) indicates the signal of the monitoring paper). In this case, there is a risk that the paper surface unevenness, measurement error, positional deviation, etc. will all be judged as defective.For this reason, E (t) - E'' (t) <
±M-5- is set, and a defect level that is expected to occur in the reflected light quantity measurement chain at the same position is set in M, and it is determined that the signals are not the same at a point exceeding this level.

However, when viewed microscopically, even the same sheet of paper often shows problems, such as a single spot of dirt or a small area of uneven printing. For this reason, when measuring two paper surfaces and comparing individual measurement points that are time-divided, there are many points where the same signal does not occur depending on the position. Therefore, in the present invention, the points that are defective by comparing the same positions with each other are totaled, and the ratio of the number of defective points to the number of all measurement points is set in advance, so that the defective points are determined. When this ratio is exceeded, it is determined that the monitored paper is a different type of paper.

Further, correction of positional deviation on the frame is performed by using a plurality of optical sensors. For left-right deviation (deviation perpendicular to the direction of movement of the signature), a plurality of optical sensors are installed, and the memory 6 - - is read out while switching and compared. Furthermore, for front-to-back deviations (shifts in the direction of movement of signatures), a constant is added or subtracted from the memory address, read out, and compared.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a misprint monitoring device according to the present invention. The misprint monitoring device of the present invention can correct positional deviation on the frame.

The sensor part 1 is fixed to the frame of the collating machine and monitors the bottom paper surface of the signatures stacked on the frame of the collating machine.

The sensor part 1 is constituted by a plurality of optical sensors arranged perpendicularly to the direction of movement of the signature. The sensor part 1 is made to reflect light from a light source lamp onto a paper surface, and convert the reflected light into analog electric light by a light receiving element. The output of the sensor part 1 is amplified by an amplifier 2. The amplification 112 is configured to prevent noise, etc. from entering.
−7− A buffer amplifier that performs impedance conversion is desirable,
stomach.

The amplified signal is sent to the AD controller 11. The AD controller 11 samples an analog signal and sends it to the 〇 converter 13 when there is a measurement pulse from the measurement time open controller 12 . The measurement time controller 12 is activated by signal pulses from the starter 3. The starter 3 is attached to the power shaft of the collating machine, and is designed to generate a signal pulse at the same time as the collating machine grasps the signatures on the frame and begins to pull them out.

Sampling is performed in a time-division manner using pulses from the encoder 4. The encoder 4 is attached to the power shaft of the collating machine and generates pulses in accordance with the working speed of the machine.

1024 pulses are generated per rotation of one wheel. The sampled signal is sent to the AD converter 13 and converted into a digital signal.

-8- The sensor part 1, amplifier 2, starter 3 and encoder 4 are installed inside the collating machine.

FIG. 3 is an explanatory diagram showing how the amplified output of the sensor part 1 is sampled once and further subjected to AD conversion for 8 hours. The vertical axis shows the amount of reflected light, and the horizontal axis shows time. The output 20 from the sensor part 1 is divided in time (horizontal axis).

By this operation, analog signals are stored as digital signals at many measurement points in the storage circuit 75 in accordance with the data order according to instructions from the memory controller 14. Due to its role, the memory circuit 75 is largely comprised of the standard memory 15 and Im! It can be divided into 16 memories.

There is no functional difference between the standard memory 15 and the monitoring memory 16. The monitoring memory 16 is further composed of a plurality of memories.

Memory 15 stores information on standard paper, and memory 1
6 stores information on the monitoring paper.

Depending on the size of the paper, the information on the page is multi-point digital signals, such as 4-9-00, 200, or 100 pieces.
．． The information is stored in memory 15 or memory 16 in order. The operations of memory 15 and memory 16 are as follows.

The contents of the memory 16 are compared with the contents of the memory 15 by a level defect detector 31, and if there is a difference of more than a predetermined level M, it is determined to be defective.

detected. That is, the information of the measurement point at the first opening of the standard paper surface of the memory 15 (hereinafter referred to as Et) is the level defect detection 1.
31. Information on the first measurement point (hereinafter referred to as E't) on the monitoring sheet in the memory 16 is led to the level failure detector 31. Then, the level failure detector 31 determines whether E't is a failure point by determining Et-E"t <M. The level M is arbitrarily set by the failure level setting device 32. For example, , small kanji characters, and patterns, and level M can be set depending on the status of the monitoring screen 11.

-10- If E-t is a defective signal, the level defect detector 31
One pulse is sent to the defective rate detector 51 from.

The defect rate detector 51 counts the number of pulses. Next, the information at the second measurement point on the standard paper (t: t i and the information at the second measurement point on the monitoring paper <E't) is compared in the same way, and E't is the defective signal. It is determined whether This operation is performed for all measurement points. The memory circuit 75 will be explained in more detail later using FIG. 2.

The measurement time controller 12 terminates the operation of the AD controller 11 in response to the measurement end pulse from the preset counter 21. Preset counter 21
counts the pulses from the encoder 4 and sends a counting end pulse to the counting time controller 12 according to the settings of the paper size setting device 22. The paper size setting device 22 is set according to the size of the signatures to be bound. As shown in "(B) Movement of signatures" in Figure 4, the vise of the collating machine holds the signatures.
11- The operation of conveying from the can to the conveyor is completed by half a revolution of the visiting shaft. In this area, 512 intense pulses are generated from encoder 4. The measurement on the paper was completed with the encoder 4 emitting 512 pulses, which is approximately 400 on an A4 sheet of paper. Therefore, A4
In the case of the A5 size, which is half the size of the paper, the measurement is completed with 200 pieces, and in the case of the A6 size, the measurement is completed with 100 pieces. The number of pulses is set by the paper size setting device 22, and the preset counter 21 uses this setting as a reference to set the measurement end pulse to the measurement time controller 12.
The measurement is completed.

In this way, the measurement ends with the measurement end pulse.

At this time, the number of defective @ numbers is stored in the defect rate detector 51. Whether or not a signature is defective is determined based on the ratio of the number of defective signals to the total number of measurement points. This is to prevent the same paper surface from being determined to be of different types due to slight stains on the paper surface. The preset counter 41 counts the pulses of the encoder 4 during the measurement time, and stores the total number of measurement points. The defective rate setter 42 sets the percentage of the defective signal to the total number of measurement points. For example, if the defective rate setting device 42 is set to 20% on an A4 size paper, and the number of measurement points on the A4 size paper is 400, then 80%
point is the limit for the number of defective signals. This 80-point information is sent from the preset counter 41 to the defect rate detector 51. The number of defective signals is stored in the defect rate detector 51, and this number of defective signals is compared with the information sent from the preset counter 41, and the signal indicating whether the monitored paper is of the same type or different type indicates that continuous defects have occurred. The signal is sent to a detector 61. The continuous failure occurrence detector 61 issues a failure command to a command circuit (not shown) as a final failure only when the number of failure determinations reaches the number set by the continuous failure count setting device 62. -13- Issue. If the consecutive defective count setting device 62 determines that even one sheet is defective, it can issue a defect command, but in the case of misprinted pages due to a loading error, about 50 to 100 sheets will be defective in a row, so continuous defective sheets will be issued. If the number of units setting a62 is set to 3, for example, a defect command will be issued only when a defect is detected three times in a row. The setting of the number of consecutive failures setter 62 can be set arbitrarily, and this number of consecutive failures setter 62 makes it possible to monitor only irregular pages due to loading errors. The final defective judgment issued to the command circuit will sound the buzzer 6.
or stop the collating machine to notify the operator.

The memory circuit 75 will be explained in more detail with reference to FIG.

The misprint monitoring device according to the present invention can perform positional correction for left-right misalignment (displacement perpendicular to the signature movement direction) and front-back misalignment (displacement in the signature movement direction) of the signature.

The number of optical sensors and the number of memories in the sensor part-14-1 are determined by the number of times correction is to be performed. For example, if correction is to be performed five times in the left-right direction, five optical sensors of the sensor part 1 must be installed in the left-right direction. And the number of memories is standard memory 15 and 1
A total of 6 pieces, 5 pieces and 5 pieces of monitoring memory 11, are required. .

Assume now that position correction is performed five times in the left-right direction and three times in the front-back direction. At this time, N is 28 in Figure 2,
The required memories are Memory 15, Memory 24, Memory 25, Memory 26, Memory 27, and Memory 28.
becomes. First, a standard paper surface is measured with one optical sensor,
The signal is stored in memory 15. Next, the monitoring paper is 5
Measurements are made with the optical sensors and the signals are stored in the memory 24~
28 - Then, first, memory 15, memory 24, and memory 1.
5 and Memory 25, Memory 15 and Memory 26, Memory 15 and Memory 2-15-7, and Memory 15 and Memory 28 will be compared. The comparison is performed by the level failure detector 31 and the failure level detector 51. This result is stored in the non-defective product determination storage circuit 71. This means that the horizontal deviation has been corrected five times and compared. Next, memory 2 for memory 15
Compare the address of 4 plus the constant K. Comparisons are made five times in order: one tenth of the addresses of the memories 15 and 25; one tenth of the addresses of the memories 15 and 27; and one tenth of the addresses of the memories 15 and 27. With this, it is possible to correct the case where the signature shifts backwards, and the case where the left-right shift overlaps with the backward shift. Finally, the addresses of the memories 15 and 24 minus the constant K are compared. A similar comparison will be made for memory 25, memory 25 to memory '28 in the following order. In all of these comparisons, the non-defective product and the defective product are determined in the non-defective product determination memory @1171 based on the comparison results in the left-right direction, the front-back direction, and the diagonal direction of the combination thereof.

The above operations are performed by the memory switching circuit 72, the address correction calculation circuit 73, and the read-back count counter 74.

Figure 4 shows the period during which the T-coupling power shaft makes one revolution (that is, the period from when the folded sheets stacked on the frame are conveyed onto the belt conveyor to complete one rotation as one book). FIG. 3 is an explanatory diagram showing the operation of each part.

(A> shows the rotation of the power shaft of the T-stand shelf. (B) shows the movement of the signature, where the vice grips the signature with X, moves with Y, and the signature falls onto the conveyor with Z. (C) shows the output pulse of the encoder 4. (D) shows the pulse of the starter 3. (E) shows the output pulse of the preset counter 21. (F) shows the output of the sensor part 1. show.

(G) shows the output of the AD silicon roller 11.

When the power shaft of the T-shelf begins to rotate (A), the -17- vise grips the signature stacked on the T-shelf frame and moves it (B). At the same time, a pulse is sent from the starter 3 to the measurement open controller 12 (D), and measurement is started. Further, from the encoder 4 attached to the power shaft of the T-stand shelf, pulses are sent to the AD switch roller 11 and the preset counter 21 according to the rotation angle (C).

Simultaneously with the movement of the signature, an analog signal output is sent from the sensor part 1 to the AD switch roller 11 (F). The AD controller 11 samples the analog signal output using pulses from the encoder 4 (G). A.D.
The output of the control roller 11 is sent to an AD converter 13 and converted into a digital signal.

The signature is dropped onto the conveyor before the power shaft makes half a revolution, that is, before 512 pulses from the encoder 11 are generated. Therefore, the preset counter 21 counting the pulses from the encoder 4 sends a measurement end pulse to the measurement time controller 12 when the count number set by the paper sensor 18 - size setting device 21 is reached (E).

Although the paper surface can be determined in the above manner, the determination accuracy can be further improved by controlling the memory circuit 75 as follows.

Through the above-described operation, if it is determined that, for example, the memory 25 and the standard memory 15 among the monitoring memories 16 match and are of the same type, the memory controller 14 erases the memories in all memories other than the memory 25. Then, the information in the memory 25 is left and this is used as a standard for comparison with the next monitoring paper. Information on the next monitoring paper is stored in a memory other than memory 25. If the result of the judgment is that it is defective, the memory will not be changed.

This is because there are slight changes in the density of printed matter, and this may occur between those printed in the morning and those printed in the afternoon. This is because -19 constant cannot be maintained. In addition, the standard is constantly changed in response to changes caused by electrical drift, etc., which greatly helps improve measurement accuracy.

According to the misprint monitoring device according to the present invention, when identifying the pattern on a print object, it is possible to minimize false detections caused by local stains, uneven markings, misalignment of marks, changes in printing equipment, operating conditions of the device, etc. In addition, since it can check a wider range of paper than static pattern checking, it has a great ability to discriminate between different types of paper, and is highly effective when used to prevent misprints when printing.

In addition, it is possible to correct misalignment of signatures, so
Misprinted pages can be accurately determined as 1.

In general, since the allowable level range and degree of similarity can be arbitrarily set using the defective level setter and the defective rate setter, accurate judgments can be made in response to a wide variety of printed matter.

-20-

[Brief explanation of the drawing]

FIG. j! A block diagram of the device; FIG. 2 is a detailed block diagram of the storage circuit 75; FIG. 3 is an explanatory diagram showing how the amplified sensor output is sampled and AD* converted;
The figure is an explanatory diagram showing the operation of each part during one rotation of the power shaft of the T junction line. 1... Sensor part 2... Amplifier 3... Starter 4... Encoder 11... AD controller O-ra 12... Measurement time controller 13... AD converter 14... ... Memory controller 15 ... Standard memory 16 ... Monitoring memory 21 ... Φ preset counter 22 ... Paper size setting device -21- 31 ... Level failure detector 32 ... Failure level setting device 41・φ preset counter 42 ・Defective rate setter 51 ・Defective rate detector 61 ・Continuous failure occurrence detector 62 ・Continuous failure count setter 71 ・Good product judgment memory circuit 72 ・...Memory switching circuit 73...Address correction calculation four-way 74...Rereading number counter 75...Memory circuit -22- Figure 3 Figure 4 (D) (G) Procedural amendment (method) 6% Formula % 1, Incident Display Patent Application 1986-1455511! 2. Invention name misprinting monitoring device 3. Relationship with the case of the person making the amendment Patent applicant address: 28-6 Iwabuchi-cho, Kita-ku, Tokyo Name: Kita Denshi Co., Ltd. 4, Agent address: 2-39 Nishi-Shinbashi, 1-ku, Tokyo -8 5. Submit the application and specification according to the date of the amendment order, the application and specification to be amended, and the contents of the amendment. No changes to content.

Claims (1)

[Scope of Claims] A plurality of optical sensors installed on a fold stacking table of a T-shelf used in bookbinding and arranged perpendicularly to the direction of movement of the folded folding sheets, and a plurality of optical sensors each of which is arranged vertically to the direction of movement of the folded sheets. An AD switch roller and an AD converter that convert the output into digital signals, one standard memory and a plurality of monitoring memories that store the digital signals, and a level failure detector that compares the contents of each memory with a predetermined level. and a defective rate detector that compares the number of defective signals from the level defective detector and the number of measurement points; light sensor 1
The output is measured by the AD silicon roller and the A
The signal is converted into a digital signal by an O converter and stored in the standard memory, and the bottom paper surface of the monitoring signature placed on the early signature stacking table is measured by all of the plurality of optical sensors, and each The output is transferred to the AD silicon roller and/or
1. After converting into digital signals with a 3D converter and storing them separately in the plurality of monitoring memories, reading out the plurality of monitoring memories one after another in order to correct the position of the monitoring signature, and outputting the separate monitoring memories. perform the operation,
The difference between the read contents of the III memory and the standard memory is calculated, and the number of defective signals for which the difference exceeds a predetermined level is stored in the defective rate detector, and the defective I.
A misprint monitoring device characterized by being configured to monitor misprint by comparing the number of grains at a measurement point with the number of grains at a measurement point.