JPS6160012B2 - - Google Patents

Description

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

Various types of misprint monitoring devices have been developed. For example, FIG. 1 is a block diagram showing the entire system of a misprint monitoring device proposed by the present applicant. Reference numeral 1 denotes a sensor that irradiates light onto a paper surface and converts the amount of reflected light into an amount of electricity using a light receiving element. The output of the sensor 1 is amplified by the amplifier 2, and the judging device 77 judges the paper surface. The entire system of the misprint monitoring device proposed by the present applicant is detailed in, for example, Japanese Patent Application No. 145551/1983.

Generally, during the collation process, there is not one fold stacking table (hereinafter simply referred to as frame) on which folds are placed, but rather a large number of frames are lined up and collated. A sensor 1 is placed in each frame to monitor for misprinted or missing pages.

Therefore, for example, according to the misprint monitoring device proposed by the present applicant, the entire system of the misprint monitoring device shown in FIG. 1 is required for each frame. This increases the number of parts and wiring, making it very uneconomical.

In addition, the determination device 77 is precise and expensive, and should be installed at a desired location as far away from the collation machine as possible in order to avoid a decrease in determination accuracy or failure due to vibrations from the collation machine or its peripheral equipment. is desirable.

However, the device proposed by the present applicant requires a determining device 77 for each frame, and therefore a plurality of determining devices 77 must be set at predetermined positions.
Therefore, there are problems with installation space and wiring, and moreover, it is inconvenient to handle.

Furthermore, as labor saving in factories is desired, it is desired that one operator be able to perform the following operations from a position that is separate from the collating machine and allows him to see the entire collating machine.

In other words, the operator sets the defect level for each frame, which is the standard when comparing the information on the measurement points on the monitoring paper for each frame with the information on the measurement points on the standard paper, and The operator sets the defective rate for each frame, and the operator knows which frame of the signatures in each frame is defective.

If these operations can be performed in one place, one operator can centrally manage the entire collating machine, and collating work efficiency can be greatly improved.

The present invention has been made in view of the above-mentioned circumstances, and allows a single judgment device to process outputs from multiple sensors so that a precise and expensive judgment device can be placed at a desired location separately from the collating machine. The operator can set the defective level for each frame, set the defective rate for each frame, and determine which of the signatures in each frame is defective. An object of the present invention is to provide a misprint monitoring device that can intensively perform monitoring work.

The misprint monitoring device of the present invention is configured such that a multiplexer is provided between the amplifier and the determining device, the determining device is installed separately from the collating machine, and one determining device can process a plurality of outputs, The determination device determines a defect level for determining whether the information on the measurement point on the monitoring paper surface is good or bad when comparing the information on the measurement point on the monitoring paper surface of each fold stacking table and the information on the measurement point on the standard paper surface. A defect level setting means for setting a defect level in advance for each fold stacking table, and a defect level setting means for setting in advance for each fold stacking table the ratio of the number of defective signals of the measurement points on the monitoring paper surface of each fold stacking table to the total number of measurement points. The apparatus is provided with a rate setting means and a defect display means for displaying which fold stacking table has defective folds.

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

FIG. 2 is a block diagram of a misprint monitoring device according to the present invention.

The sensor 1 is fixed to each frame of the collating machine, and monitors the bottom paper surface of the signatures stacked on the frame of the collating machine. For example, if there are n frames, n sensors 1 are also required. No.1...No.n indicates the frame number. The sensor 1 is constructed to reflect light from a light source lamp onto a paper surface, and convert the reflected light into an analog quantity of electricity by a light receiving element. The output of sensor 1 is amplified by amplifier 2. The amplifier 2 is preferably a buffer amplifier that performs impedance conversion in order to prevent noise and the like from entering.

The amplified signal is sent to multiplexer 79. The analog signal is time-divided by the multiplexer 79, and signals No. 1 to No. n are sent to the determination device 77 in order.

The misprint monitoring device of the present invention will be explained in more detail.

FIG. 3 is a detailed block diagram of a misprint monitoring device according to the present invention.

The portion surrounded by a broken line indicates the determination device 77. The analog signal divided by the multiplexer 79 is first sent to the AD controller 11. A.D.
In the controller 11, the measurement time controller 1
During the second measurement pulse, the analog signal is sampled and sent to the AD converter 13. 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 by pulses from a 1/n pulse generator 78. The pulses from the 1/n pulse generator 78 are obtained by further dividing the pulses from the encoder 4 into 1/n. 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. The encoder 4 generates 1024 pulses per rotation of the rotating shaft. Therefore,
The pulse from the 1/n pulse generator 78 is applied to the rotation axis 1.
1024n will be generated per rotation. 1/n
Pulses from pulse generator 78 are also sent to multiplexer controller 83 to control multiplexers 79-82. The signal sampled by the AD controller 11 is sent to the AD converter 13 and converted into a digital signal.

Sensor 1, amplifier 2, starter 3 and encoder 4 are installed inside the collating machine. The determination device 77 is installed separately from the collating machine.

Here, the multiplexer 79 will be explained.

FIG. 4 is an explanatory diagram of the function of the multiplexer 79.

No.1 to No.n are output 2 from sensor 1 of each frame
In the graph showing 0, the vertical axis shows the amount of reflected light, and the horizontal axis shows time. Also, (A) is the 1/n pulse generator 7
(B) shows the pulse from encoder 4. As described above, the 1/n pulse generator 78 generates n times as many pulses as the pulses from the encoder 4. Then, the multiplexer 79 divides the output 20 in synchronization with the pulse from the 1/n pulse generator 78 and sends it to the AD controller 11. That is, in FIG. 4, the signals indicated by the solid lines of the outputs 20 from No. 1 to No. n are sequentially sent to the AD controller 11. In this way 1/n
When the pulse generator 78 outputs the nth pulse 85 (that is, when the pulse 85 is output from the encoder 4)
When a 6 is rolled), it returns to No. 1 again. This is repeated, and the AD controller 11 receives numbers from No. 1 to No.
Up to n analog signals are sent in sequence.

FIG. 5 is an explanatory diagram showing how the amplified output 20 of the sensor 1 is sampled and further AD converted. The vertical axis shows the amount of reflected light, and the horizontal axis shows time. In this way, the output 20 of one sensor 1 becomes a discrete signal. The period of this signal is equal to the pulse period of the encoder 4, and the width of the signal is equal to the pulse period of the 1/n pulse generator 78.

Through the above operations, 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.

The case where there is one output 20 will be described below. The same can be considered in the case where there are a plurality of outputs 20.

The memory circuit 75 can be broadly divided into a standard memory 15 and a monitoring memory 16 based on their roles. There is no functional difference between the standard memory 15 and the monitoring memory 16. The memory 15 stores information on the standard paper, and the memory 16 stores information on the monitored paper. The information on the page depends on the size of the page.
For example, 400, 200, or 100 digital signals are stored in the memory 15 or 16 in order. The operations of memory 15 and memory 16 are as follows.

The contents of the memory 16 are stored in the level failure detector 31.
The content is compared with the contents of the memory 15, and if there is a difference of more than a predetermined level M, it is detected as a defective point. That is, the information of the first measurement point on the standard paper surface of the memory 15 (hereinafter referred to as E ₁ t ₁ ) is derived to the level failure detector 31 . Next, the information of the first measurement point on one monitoring paper in the memory 16 (hereinafter
E ₁ 't ₁ ) is led to the level failure detector 31.
Then, the level failure detector 31 determines that E ₁ t ₁ −E ₁ ′t ₁ <
Based on the determination of M, it is determined whether E ₁ 't ₁ is a defective point. The level M is arbitrarily set by the defective level setter 32. For example, it is divided into small kanji characters, pictures and patterns, etc., and level M can be set depending on the condition of the monitored paper.

The number of failure level setters 32 is the same as the number of frames, and is connected to the level failure detector 31 via a multiplexer 80. Multiplexer 80 is connected to multiplexer controller 83. In other words, the level M can be set according to each frame.

If E ₁ 't ₁ is a defect signal, one pulse is sent from the level defect detector 31 to the defect rate detector 51 . The defect rate detector 51 counts the number of pulses. Next, the information E ₂ t ₂ of the second measurement point on the standard paper and the information E 2 ′t ₂ of the second measurement point on the monitoring paper are compared in the same way, and E _{2 ′} t ₂ is determined to be defective. It is determined whether it is a signal or not. This operation is performed for all measurement points on one monitoring sheet.

The measurement time controller 12 uses the measurement end pulse from the preset counter 21 to
The operation of the AD controller 11 is ended. The preset counter 21 is a 1/n pulse generator 7
8, 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. The paper size approximately determines the number of pulses from the 1/n pulse generator 78. The number of pulses is set by the paper size setting device 22, and the preset counter 21 sends a measurement end pulse to the measurement time controller 12 based on this setting, and the measurement is ended.

In this way, the measurement ends with the measurement end pulse. At this time, the number of defective signals of the frame is stored in the defective 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 1/n pulse generator 78 during the measurement time, and the total number of measurement points in each frame can be determined. The defective rate setting device 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 if the number of measurement points on the A4 size paper is 400, then 80 points will be the limit for the number of defective signals.

This 80-point information is sent from the preset counter 41 to the failure rate detector 51.

The same number of failure rate setters 42 as the number of frames are installed, and are connected to the preset counter 41 via a multiplexer 82. Multiplexer 82 is connected to multiplexer controller 83. In other words, the defective rate can be set according to each frame.

The number of defective signals is stored in the defective 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 or different type is determined to be continuous defective. The signal is sent to the occurrence 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 specified by the continuous failure count setting device 62. . If the consecutive defective count setting device 62 determines that even one sheet is defective, it can issue a defective 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 it is possible to issue a defective command. If the number of times setter 62 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 defect determination sent to the command circuit is notified to the operator by sounding a buzzer or stopping the collating machine.
In addition, the defective rate detector 51 includes a multiplexer 8
1 to the defect indicator 84. The number of defect indicators 84 is the same as the number of frames, and indicates which frame is defective. By checking the defect indicator 84, the operator can intensively monitor which frame's signatures are defective.

The operation of the misprint monitoring device of the present invention will be explained below.

When the collating machine's power shaft begins to rotate, a vice grips and moves the signatures stacked on the collating machine frame. At the same time, a pulse is sent from the starter 3 to the measurement time controller 12 and the 1/n pulse generator 78, and measurement is started. Further, an encoder 4 attached to the power shaft of the collating machine sends pulses to a 1/n pulse generator 78 according to the rotation angle. Simultaneously with the movement of the signature, the analog signal output from sensor 1 passes through multiplexer 79.
It is sent to the AD controller 11. During,
Analog signals are sampled. The output of the AD controller 11 is sent to the AD converter 13, converted into a digital signal, and judged.

The preset counter 21, which counts the pulses from the 1/n pulse generator 78, sends a measurement end pulse to the measurement time controller 12 when the count reaches the number set by the paper size setting device 21. With the above, you can judge the paper.

According to the misalignment monitoring device of the present invention, a single determining device can process multiple outputs, and the precise and expensive determining device can be placed in a desired position, preferably in a position where the operator can see the entire collating machine. It can be installed separately from the collating machine. At this time, the determination device is 1
There are no problems with installation space or wiring. And it is very economical. moreover,
The entire device can be compactly assembled and is very easy to handle.

Setting the defect level for each frame, which is the standard when comparing the information on the measurement points on the monitoring paper for each frame with the information on the measurement points on the standard paper, and calculating the defective rate for the measurement points on the monitoring paper for each frame. The work of setting each frame and the monitoring work of determining which of the signatures in each frame is defective are carried out in a predetermined position, and preferably the operator can see the entire collating machine. This can be done centrally using the determination device placed at the location.

Therefore, even one operator can centrally manage the entire collating machine in the discriminator.

Further, as described above, the defect level for each frame needs to be reset each time depending on the condition of the monitored paper, for example, in the case of thin Chinese characters or pictures. The defective rate for each frame needs to be reset so that the same paper surface is not determined to be of different types due to slight stains on the paper surface.

Since these settings can be made using the above-mentioned one determination device, even if there are a large number of frames and the paper condition of each frame is frequently changed, one operator can handle the situation.

Therefore, even one operator can centrally and efficiently manage the entire collating machine. This can greatly improve collation work efficiency.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the entire system of the misprint monitoring device proposed by the applicant, Figures 2 and 3
Figure 4 is a block diagram of the misprint monitoring device according to the present invention, Figure 4 is an explanatory diagram of the function of the multiplexer, and Figure 5 is an explanation showing how the amplified output of sensor 1 is sampled and further AD converted. It is a diagram. 78...1/n pulse generator, 79, 80, 8
1, 82... Multiplexer, 83... Multiplexer controller, 84... Defective indicator.

Claims (1)

[Claims] 1. A sensor is installed on each of the plurality of signature stacking tables of a collating machine used in bookbinding, and the monitoring paper surface of the bottom row of signatures placed on each signature stacking base is measured by the sensor, and the output is amplified by an amplifier. Further, in a misprint monitoring device that monitors misprinted pages by comparing the signal with a standard sheet signal using a determining device, a multiplexer is provided between the amplifier and the determining device, and the determining device is installed separately from the collating machine, The determination device is configured such that one determination device can process a plurality of outputs, and the determination device is configured to: A defect level setting means for setting a defect level in advance for each fold stacking table to determine whether the information at the measuring point on the monitored paper surface is good or bad; and a defect signal for the measuring point on the monitored paper surface of each folding stacking table. The present invention is characterized by comprising a defective rate setting means for setting in advance the ratio of the number of measured points to the total number of measurement points for each folding table, and a defective display means for displaying which folding table's folds are defective. Misprint monitoring device.