JPH037508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method and apparatus for accurately marking punched holes or the like on a long printing paper.

[Conventional technology and its problems]

The applicant of this application, in Japanese Patent Application No. 53-104160,
When printing or performing various post-processing on printing paper that has continuous markings such as punch holes, it is necessary to always accurately grasp the position of the markings and adjust the rotational speed of the printing machine or post-processing machine and the running speed of the printing paper. He proposed an invention (hereinafter referred to as the "prior invention") that enables printing, etc., to be performed accurately at a desired position by controlling the synchronization accurately (see Japanese Patent Laid-Open Publication No. 55-30940). However, this invention is based on the premise that the markings are accurately applied.

By the way, in general, when marking a running printing paper at required intervals in the running direction, the intervals are determined by the running speed of the printing paper and the processing speed of the marking machine. Therefore, if the relationship (timing) between the two becomes incorrect, for example, if the relationship for obtaining the required interval is 1:1, but becomes 1:1.1, the interval will no longer be the required one.

On the other hand, this type of machine is usually driven by an electric motor, and not only when each mechanical component is driven by a separate electric motor, but also when using a single electric motor, due to differences in the transmission paths, Due to voltage fluctuations in the power supply, the driving force of the marking machine and the running driving force of the printing paper A do not vary uniformly, that is, the marking processing speed and the running speed of the printing paper A do not vary relatively. The relationship between the two mentioned above will be disrupted.

Moreover, if the contact position of the printing paper A on each of the rollers shifts, for example, if it shifts in the roller axial direction,
The traveling speed will change, and the relationship between the two will be disrupted.

In this way, if the timing between the processing speed of the marking machine and the traveling speed of the printing paper A is out of sync, markings will not be formed at the required intervals.

However, in the past, the reality is that no control has been provided for such deviations. This is because such precision was not required. However, with today's office automation, the invention of the prior application is required, and therefore, marking position accuracy is required.

Therefore, the present invention aims to keep the timing of the processing speed of the marking machine and the running speed of the printing paper constant at all times, regardless of the above-mentioned fluctuations in the drive power supply voltage, fluctuations in the running speed of the printing paper, etc. Take it as a challenge.

[Means to solve the problem]

In order to solve the above problems, this invention first
We focused on the points shown in Figure 7. That is,
At the same time, suppose printing paper A is traveling in direction a at a required speed t, marking B is applied at point P, and from point P to a position q that is an integer multiple of the required interval of marking B, for example, 10 It is assumed that there is a sensor 9 for detecting the marking B at a location 1, and that the processing time of the marking machine 2 and the time of detection of the marking B by the sensor 9 (passing time) coincide. In other words, it is assumed that the timings of both match. In this state, the speed of printing paper A changes from t to
t'(t<t') and the processing speed of marking machine 2 is constant, marking B in section pq
The position of is shifted as shown by the chain line, and the intervals between markings B are out of order. That is, when marking B is detected at point q, it means that the marking machine 2 is not in the machining operation, and the timing between the machining time and the passing detection time will be out of sync.

This invention was made based on this focus,
In the printing marking control method, a marking time point of a marking processing machine that marks the traveling printing paper at a required interval of travel is detected, and the marking time of the marking processing machine that marks the traveling printing paper at the required interval of travel is detected, and The marking processing machine is configured to detect the passing time of the marking at a predetermined position that is an integral multiple, and to control the marking processing machine so that both detection signals are synchronized.

The printing marking control device also includes a marking processing machine that marks the running printing paper at required intervals in the running direction, a sensor that detects the marking time of this processing machine, and a marking machine that marks the running printing paper at required intervals, A sensor detects the passing point of the marking at a predetermined position in front of the processing machine that is an integral multiple of the required interval, and the marking speed of the processing machine is controlled based on the detection signals of both sensors so that both signals are synchronized. The structure consisted of a means to do this.

In this apparatus, the marking processing machine performs marking by rotational movement, a reference signal generating section that generates a reference signal in accordance with the amount of rotation constitutes a sensor for detecting the marking time, and the marking speed control means controls the marking speed. , the marking time detection signal may be controlled to be generated when the reference signal is generated.

The marking machine may be a punching machine that forms punched holes or a marking printing machine that prints ink such as magnetic ink, and the punched holes and ink printing can be used as markings.

[Effect]

In the present invention configured as described above, if the processing speed of the marking processing machine and the running speed of the printing paper deviate from each other for some reason, the marking time and the marking passing time at a predetermined position will not match. At this time, the detection signals of the detection sensors at both times become out of synchronization, so control is performed such as by changing the driving (rotation) speed of the marking machine so that the two detection signals are synchronized. In this way, the detection signals at the marking time and the marking passing time are always controlled to be synchronized, and the marking intervals are kept constant.

〔Example〕

As shown in FIG.
is printed and supplied to a punch hole processing machine 2 as a marking processing machine to form punched holes B. The punched printing paper A is supplied to a horizontal perforation machine 3 to form perforations in the width direction.

As shown in FIG. 2, the punch hole processing machine 2 includes:
A rotary disk 4 that rotates clockwise in synchronization with the processing machine 2 is attached, and a large number of holes 5, 5, . . . are formed at equal intervals on the outer peripheral edge of the disk 4. At a position close to the disk 4, there is a first light beam consisting of a light emitting section 6 that emits light to the holes 5, 5... and two adjacent light receiving sections 7a, 7b that receive the light from the light emitting section 6. A sensor 8 is installed (in the drawing, it appears that the sensor 8 is inside the disk 4, but it is located on the rear side away from the disk 4, similar to the sensor 9 in FIG. 3, which will be described later).

The voltage (output voltage) between the two terminals of the light receiving parts 7a, 7b increases or decreases depending on the amount of light received, and as the disc 4 rotates, the hole 5 opens between the light emitting part 6 and the light receiving parts 7a, 7b. When passing through the hole 5, the amount of light received through the hole 5 changes in a mountain shape, and the light receiving part 7
The output voltages of a and 7b are mountain-shaped as α ₁ and β ₁ in FIG. This voltage becomes the output signal of the light receiving sections 7a and 7b.

Further, downstream of the horizontal perforation machine 3, as shown in Fig. 1,
As shown in FIG. 3, a second optical sensor 9 for detecting holes B in the punched printing paper A is provided close to the printing paper A and is adjustable at a desired position in the running direction of the printing paper A. There is. The second optical sensor 9 has the same configuration as the first optical sensor 8, and includes a light emitting section 10 that emits light to the punched holes B, B, . . . and two light emitting sections that receive light from the light emitting section 10. Consisting of adjacent light receiving sections 11a and 11b,
As the hole B travels, the output voltages of the light receiving sections 11a and 11b also become mountain-like as shown in FIG. 5, and this voltage becomes the output signal of the light receiving sections 11a and 11b.

The printing press 1, the punching machine 2, and the horizontal perforating machine 3 are each individually driven by a servo motor 12 via a suitable speed regulating mechanism.

Next, the control structure of the above apparatus will be explained based on the block diagram of FIG.

As shown in FIG. 4, the reference signal generating section 20
Amplifying circuits 21a and 21b that amplify the signals (output voltages) detected by the light receiving sections 7a and 7b of the first photosensor 8, respectively, and subtracting the output of the amplifying circuit 21b from the amplifying circuit 21a, that is, the light receiving sections 7a,
A subtraction circuit 22, such as a comparator having an OP amplifier, which detects the voltage difference detected by 7b and generates a pulse signal when the difference changes from positive to zero (point S in FIG. 5), and this subtraction circuit. 22, and a monostable multi-circuit 23 which outputs a reference signal p in response to the pulse signal from the light receiving section 22, and when the detected value of the light receiving section 7a becomes equal to the detected value of the light receiving section 7b from a larger state (point S). A reference signal p is output.

That is, when the disc 4 rotates, the hole 5 of the disc 4
For any one hole 5, as shown in FIG. 5, first, a voltage waveform α ₁ based on the detected value of the light receiving section 7a at the front in the rotation direction appears in the amplifier circuit 21a,
Subsequently, a voltage waveform β ₁ based on the detected value of the light receiving section 7b appears. From this, in Figure 5,
The state where the voltage waveform α ₁ is downward to the right and both voltage waveforms α ₁ and β ₁ have the same value, that is, the state of the center point (x axis) between the vertices of both voltage waveforms α ₁ and β ₁ is the above arbitrary state. The hole 5 is located at the center between the light receiving sections 7a and 7b (as shown by the chain line in FIG. 2). This is S when the subtraction circuit 22 detects a voltage difference, that is, from positive to zero. When the subtraction circuit 22 detects this zero, it issues the detection signal and outputs the reference signal p from the monostable multivibrator circuit 23. is output. This signal p
is output at intervals based on the intervals (equal intervals) between the holes 5, so if these intervals are taken as marking intervals, they become detection signals at the marking time, and
The generation speed represents the rotational speed (marking speed) of the marking machine 2.

In this way, if the output signals of the two light receiving sections 7a and 7b are used to generate the reference signal p, it is possible to use a disk 4 with a hole 5 having a different shape, for example, a disk 4 with a square hole 5. However, the signal waveforms output from both light receiving sections 7a and 7b are the same, and the signal p is output based on the comparison, so that the marking time point obtained by this output can be accurately detected.

The mark position detection section 24 which receives the reference signal p from the reference signal generation section 20 includes amplifier circuits 25a and 25b that amplify the detection values detected by the light receiving sections 11a and 11b of the second optical sensor 9, respectively;
When the reference signal p is input, the amplifier circuit 25
It consists of memory circuits 26a and 26b that read and store the outputs of the memory circuits 26a and 25b, respectively, and a subtraction circuit 27 that outputs a value obtained by subtracting the value stored in the memory circuit 26b from the value stored in the memory circuit 26a.
Detection values from the light receiving sections 11a and 11b are inputted to 26b via amplifier circuits 25a and 25b, and when the reference signal P is inputted from the reference signal generation section 20, the storage circuits 26a and 26b The detected value at the time of input is stored and continues to be output to the subtraction circuit 27, and the subtraction circuit 27 outputs the difference signal Q thereof. This difference signal Q is updated by inputting the reference signal p.

In this way, this mark position detection section 24 detects any hole B among the holes B of the traveling printing paper A with the sensor 9 using the same function as the sensor 8 described above, and outputs each detection signal. Amplifier circuit 2
5a and 25b. Here, the states of the amplified waveforms α ₂ and β ₂ of this detection signal are as shown in Figure 6 a, b, and c, and the time point when the waveform α ₂ is downward to the right and both waveforms α ₂ and β ₂ have equal amounts. Assuming that the passing point of marking B is the passing point of marking B, in the state where both waveforms α ₂ and β ₂ at the X position, which is the generation point of the reference signal p, are the same and have the same amount as shown in FIG. match, the difference signal Q becomes zero, and markings B are formed at required intervals.
On the other hand, as shown _{in FIG} . (α ₂ - β ₂ ), and the position of any one hole B on printing paper A is too advanced by γ ₁ minute;
In other words, the marking speed lags behind the traveling speed of the printing paper A, resulting in a timing error. Therefore, the analog amount for this γ ₁ minute (α ₂ −
A voltage value proportional to β ₂ ) is applied to the drive control circuit 28 to delay the rotation of the servo motor 12 until it returns to the state shown in FIG. 6b, thereby achieving timing synchronization. The rotation of the servo motor 12, that is, the rotation speed (marking speed) of the punch hole processing machine 2 is controlled by a tachometer generator.
It is also detected by the TG and is always activated by the drive control circuit 28.
Since the voltage value is delayed by _γ1 , the state returns to the state shown in FIG. 6b, and thereafter the servo motor 12 continues to maintain the current state. Conversely, as shown in FIG. 6c, if a gap of -γ ₂ occurs between the equal time point Y of both amplified waveforms α ₂ and β ₂ and the reference signal generation point X, the difference signal Q
is the value of (α ₂ − β ₂ ) corresponding to −γ ₂ ,
This is because printing paper A was delayed, that is, the marking speed became faster than the running speed of printing paper A, causing a timing error, and the analog amount of +γ ₂ (α ₂ − β ₂ ) The timing is synchronized by supplying a voltage proportional to the voltage value to the drive control circuit 28 to advance the rotation of the servo motor 12 until it returns to the state shown in FIG. 6b. The above control is performed by updating each time the reference signal p is output.

Furthermore, since the shapes of the amplified waveforms α ₁ , β ₁ , α ₂ , β ₂ differ depending on the rotational speed of the processing machine 2 and the traveling speed of the paper A, the same amount of gap γ ₁ , γ ₂ does not indicate a gap difference between the same markings B. That is, even if the control amount of the servo motor 12 is set based on the gap γ ₁ , γ ₂ at a certain speed, if the rotation/travel speed changes, the control amount will be changed based on the detected gap γ ₁ , γ ₂ . However, timing synchronization cannot be obtained. Therefore, in this drive control circuit 28, the pulse signal of the monostable multivibrator circuit 23 is converted into a frequency-voltage conversion circuit (F/V conversion circuit).
29 into a voltage value corresponding to the rotational speed of the processing machine 2 and input it to the comparison circuit 30. This voltage value is compared with the subtraction value (difference signal) Q of the subtraction circuit 27, and then, for example, the comparison circuit 30 is a differential amplifier, and combines the voltage value and the subtraction value Q, that is, the subtraction value Q
is set to a value corresponding to a change in the rotational speed of the processing machine 2, and this corrected control signal is input to the drive circuit 31. However, usually the processing machine 2
Since the rotation of the converter circuit 29 does not change much, the voltage from the conversion circuit 29 is almost constant, and there is no need to make corrections.

Next, the operation of the above embodiment will be explained.

First, the amount of rotation (rotation speed) of the processing machine 2 and the amount of travel (traveling speed) of the printing paper A are determined so that the punching holes B are spaced at the required intervals based on the thickness of the printing paper A, etc., and in that state. , when the reference signal p is output, the light receiving section 1 of the mark position detection section 24
In other words, the second optical sensor 9 is placed at a position that is an integral multiple of the required interval on the travel path of the printing paper A so that the output signal waveforms of the output signals 1a and 11b become as shown in FIG. 6b.
When the apparatus shown in FIG. 1 is driven in this state, as the printing paper A runs, the printing machine 1 performs the required printing, and the punching machine 2 forms punched holes B at required intervals. Perforations are formed by the horizontal perforation machine 3 and the process moves to the next step.

In this action, when the marking time of the processing machine 2 and the marking passing time of the printing paper A at the installation position of the second optical sensor 9 are set values, that is, when the timing is obtained, the mark position detection unit 24 The output signal waveforms of both light receiving sections 11a and 11b show the state shown in FIG. 6b, and the drive control circuit 28 does not perform any control action.

Next, due to some factor, the feeding amount of printing paper A or the rotation amount of processing machine 2 changes, and the time when printing paper A passes the marking and the marking time on processing machine 2 are not synchronized, and the interval between punched holes B changes. If the required value is deviated, the output signal waveforms of the light receiving sections 11a and 11b become a or c in FIG.
8 acts to advance or retard the rotation of the servo motor 12 to synchronize the time when the printing paper A passes the marking and the time when the processing machine 2 marks.
That is, the punching holes B are controlled to be formed at required intervals.

As a result of the above-described operation, the timing of the marking time and the marking passing time is controlled so that the timing is always obtained, and the marking B is accurately performed at the required interval.

Furthermore, if the printing paper A is replaced, the paper thickness and paper quality will change, so the tension applied to the printing paper A is adjusted. Due to this tension adjustment and changes in paper thickness, etc.
As the traveling speed of the printing paper A changes, the degree of shrinkage of the printing paper after the printing process is completed changes. Accordingly, the detection sensor 9 is moved and adjusted along the running direction of the printing paper to perform the above-mentioned operation, thereby making the marking interval constant. The movement adjustment of the sensor 9 is performed based on actual operation data and the like.

Although the above embodiment is an example of detection control based on punched holes in the printing paper, for example, markings may be printed on the side edges of the running paper A and this marking may be detected photoelectrically. Furthermore, if the marking is done using magnetic ink, the same effect can be obtained even if the marking is done using a magnetic detection sensor.

〔Effect of the invention〕

This invention is configured as described above to synchronize (obtain the timing) the marking passing point on the printing paper at the required position and the marking point, so even if the two points are out of synchronization for some reason, , the marking machines are controlled in synchronism to form markings accurately at the required spacing.

In this way, if marking is done accurately,
Based on this, perforations etc. can be made accurately, so it is effective for paper such as foam paper which requires accuracy in terms of paper length, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view illustrating a part of a printing apparatus according to the present invention, FIGS. 2 and 3 are enlarged perspective views of main parts of FIG. 1, and FIG. Fig. 5 is an explanatory diagram showing the amplified waveform when the detection signal from Fig. 2 is amplified;
FIGS. 6a, b, and c are explanatory views showing the amplified waveforms according to aspects when the detection signal from FIG. 3 is amplified, and FIG. 7 is an explanatory view of the operation of the present invention. A...Printing paper, B...Punching holes, 1...
Printing machine, 2... Punch hole processing machine, 4... Disc, 5
... Hole, 6, 10 ... Light emitting part, 7a, 7b, 11
a, 11b... Light receiving section, 8, 9... Light sensor,
12... Servo motor, 20... Reference signal generation section, 21a, 21b... Amplification circuit, 22... Subtraction circuit, 23... Monostable multivibrator circuit,
24... Mark position detection section, 25a, 25b...
Amplification circuit, 26a, 26b...Memory circuit, 27...
...Subtraction circuit, 28... Drive control circuit.

Claims (1)

[Scope of Claims] 1. Detecting the marking time of the marking processing machine 2 that applies markings B to the running printing paper A at required intervals in the running direction, and detecting the marking time point in front of the processing machine 2 in the printing paper running path. A printing marking control method comprising detecting the passing time point of the marking B at a predetermined position that is an integral multiple of the interval, and controlling the marking processing machine 2 so that both detection signals are synchronized. 2. A marking processing machine 2 that applies markings B to the traveling printing paper A at required intervals in the traveling direction;
a sensor 8 that detects the marking time of the processing machine 2; and a sensor 9 that detects the passing time of the marking B at a predetermined position in front of the processing machine 2 on the printing paper travel path that is an integral multiple of the required interval. , means for controlling the marking speed of the processing machine 2 based on the detection signals of both sensors 8 and 9 so that both signals are synchronized. 3. The marking processing machine 2 is designed to perform marking by rotational operation, the reference signal generating section 20 that generates a reference signal in accordance with the amount of rotation constitutes a sensor for detecting the marking time, and the marking speed control means is controlled by the marking speed control means. 3. The print marking control device according to claim 2, wherein control is performed so that the marking time detection signal is generated when the reference signal is generated. 4. The printing marking control device according to claim 2 or 3, wherein the marking machine is a punch hole machine that forms punched holes, and the punched holes are marked B. 5. Print marking control according to claim 2 or 3, wherein the marking processing machine is a marking printing machine that prints magnetic ink or other ink, and the ink printing is designated as marking B. Device.