JPH0410088B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a synchronization control method for rotating units, and more specifically, for example, to a method for controlling the synchronization of a rotary unit, and more particularly to a method for controlling the synchronization of a rotary printing machine and a groove cutting machine, which are installed in a corrugated sheet production line, for example. In a rotating unit equipped with a series of multiple rotating cylinders, even if the reference point of the rotating cylinders differs from production sheet to production sheet or production machine unit to production machine unit, this rotating unit can achieve accurate synchronization in a short time. This invention relates to a tuning control method.

Conventional technology and its solutions Multi-color rotary printing presses, so-called printer slotters (combined equipment of multi-color rotary printing presses and groove cutting machines) used in corrugated sheet manufacturing lines, and other printer die cutters (multi-color rotary printing machines) In a rotating unit equipped with a plurality of rotary cylinders of the same diameter in series, such as a combined device of a cutting machine and a punching machine, each rotary cylinder has a unique machine for its processing contact point (bottom dead center or top dead center). Each reference point must be accurately synchronized, that is, return to the origin, so that each reference point sequentially arrives at the corresponding processing contact point in a timely manner as a series of processing steps progresses over time. has become an extremely important element.

However, the units constituting each component of the above-mentioned composite device are constructed so that they can be separated from each other for work preparation and inspection, and each cylinder is used for attaching a stamp plate or die board, adjusting the position of the grooving blade, etc. Since the cylinders can be freely rotated independently, the relative positions of the reference points of the rotary cylinders will be random at the time when the above-mentioned setting operations are completed and the units are reconnected. Therefore, it is impossible to operate the apparatus in this state, and it is necessary to synchronize the series of reference points before operation.

This relationship will be explained with reference to FIG. 1. A printer slotter suitably used in a corrugated sheet manufacturing line is shown as a typical example of the above-mentioned multifunction device. This is the paper feed device 10
, and the plate cylinder 12 is rotatably arranged.
It basically consists of a printing unit 14, a second printing unit 18 in which a plate cylinder 16 is disposed, a creaser unit 22 in which a ruling head 20 is disposed, and a slotter unit 26 in which a grooving head 24 is disposed. . Each unit has a common rail 28
They can be freely moved on the top via wheels 30, so that they can be connected and separated from each other.

The plate cylinders 12 and 16, the scoring head 20, and the grooving head 24 (some of which cannot be strictly called cylinders, but hereinafter referred to as rotary cylinders for convenience) have b ₁ , b ₂ , and b, respectively. Each of the processing contacts (bottom dead center in this embodiment) shown by ₃ and b ₄ performs the functions of printing, lining, and grooving. Therefore,
When stacked corrugated sheets 32 are fed to the paper feeder 10, when the leading edge of the sheet 32 reaches the bottom dead center of each rotating cylinder, the unique reference point of the cylinder also comes to the bottom dead center. It is necessary to adjust. In this specification, the act of operating so that the reference points of a plurality of rotating cylinders sequentially arrive at the corresponding bottom dead center in a timely manner is referred to as "synchronizing the reference points" in this specification. As explained in conjunction with FIG. 2, the "reference point" here refers to the point from the paper feed start origin a where the leading edge of the sheet 32 is gripped by a pair of paper feed rollers 34 to the bottom dead center of each rotating cylinder. Point to the position on the outer periphery of the cylinder that has returned in the opposite direction of rotation by the straight line distance to bx,
This is indicated by the symbol P.

As mentioned above, each unit is separated from the other during preparation for work, inspection, etc., and after each rotary cylinder is freely rotated independently, each unit is reconnected. For this reason, the reference point P of each rotary cylinder deviates from the zero point Z, which is located at a fixed position spaced circumferentially from the corresponding processing contact point b by a predetermined center angle, making it impossible to achieve so-called synchronization.

In order to correct such a deviation of the cylinder reference point P from the zero point Z, various means have been conventionally employed for manually or electrically rotating the cylinder and returning the reference point to a predetermined zero point. However, regardless of whether manual or electric means are used, the operator must align the reference line such as an arrow with the scale, which avoids the introduction of external error factors such as visual errors or unfamiliarity on the part of the operator. It was difficult. Also,
Even if the reference point of the rotating cylinder in each unit can be accurately returned to zero, when the units are recombined, meshing errors will occur in the series of gear trains, resulting in complete synchronization of the rotating unit as a whole. may not be achieved. Therefore, before operating the equipment, it is necessary to testly supply a workpiece, such as a cardboard sheet, to check the processing state, which requires complicated operations and a lot of adjustment time. The reality is that many sheets are wasted.

In order to solve the above-mentioned drawbacks inherent in the conventional technology, the inventors have made extensive efforts to develop a pulse signal for detecting the start of supply of the workpiece and a pulse signal for detecting the position of the reference point of the rotating cylinder. We have devised a control method in which the direction of the phase difference is determined by comparing the two directions, and the rotation cylinder is controlled to rotate forward or reverse depending on the direction to bring the phase difference closer to zero, and we have completed the patent application prior to filing this application. . The control method according to this patent application is highly evaluated in that it is possible to easily return the reference point specific to each rotary cylinder to the corresponding zero point with a simple configuration.

However, in the above control method, it is assumed that the reference point of each rotating cylinder is determined mechanically and fixedly. Therefore, since the reference point of each rotary cylinder is not fixedly determined, a rotary unit having a configuration that changes depending on the dimensions of the workpiece, etc. has the disadvantage that it cannot be put to practical use as it is. In other words, the printing plates, die boards, etc. that are wrapped around and attached to each rotating cylinder are manufactured to the specifications of conventional manual attachment machines, so the reference point is the same as the workpiece being produced. Each product sheet or production machine has a different design. Therefore, if the control method described above is to be introduced into this type of mechanical device, it is necessary to redesign and re-produce these jigs, which means imposing a large burden on the user. was.

Purpose of the Invention Therefore, the inventor of the present application conducted further studies in order to obtain a highly versatile tuning control method that can be used as is in the existing state without requiring redesign of the jig. As a result, the absolute position within one cycle from the feed start origin to the next origin is converted into a numerical value as the circumference of the rotating cylinder, and the non-synchronized state is calculated numerically from the reference point of each rotating cylinder and the absolute position value. It has been found that if the value is recognized and controlled so that this value matches the command value, the desired request can be fully met.

Means for Solving the Problems Accordingly, the present invention includes a paper feeding device that feeds sheets of paper to be processed one by one, and a paper feeding device that is arranged in series to perform required processing on the sheets of paper fed from this feeding device. In a rotary unit such as a composite device of a rotary printing press and a groove cutter, which comprises a plurality of rotary cylinders and a differential mechanism that adjusts the phase between these rotary cylinders, the paper to be processed is processed by a signal from the paper feeding device. detecting the position of the paper to be processed, and providing a reference point for each rotating cylinder based on the distance between the paper feeder and each rotating cylinder so that the rotating cylinder performs the same processing on the paper to be processed; Regarding the point that should be tuned to the tip of
specifying a position from the reference point, and controlling a differential mechanism provided in each rotating cylinder based on the position of the paper to be processed, the detected position of the rotating cylinder, and the specified position from the reference point; It is characterized in that, by actuation, an arbitrary point on each rotating cylinder is synchronized with the leading edge of the paper to be processed.

Embodiments Next, a method for controlling the synchronization of a rotary unit according to the present invention will be described below using preferred embodiments with reference to the accompanying drawings. Although the "printer slotter" shown in FIG. 1 has been cited as a specific example of a rotary unit in which the synchronization control method according to the present invention is implemented, other "printer slotters", which are combined devices of a rotary printing press and a punching machine, may also be used. It can also be suitably applied to the "Printer Daikatsuta" and the "Printer Daikatsuta Slotta" which combines a rotary printing press with a groove cutter and a punching machine and can selectively perform printing groove cutting or printing punching. . Furthermore, the control method of the present invention can only be applied to existing equipment equipped with a differential mechanism for adjusting the phase of a rotary cylinder (for example, a differential mechanism related to the trademark "Harmonic Drive"). Most rotary units of multifunction devices such as color rotary printing presses and printer slotters are equipped with the above-mentioned differential mechanism for phase adjustment, so there is no concern that the application of the present invention will be limited.

First, prior to explaining the contents of the present invention, a theoretical analysis will be performed with reference to FIG. 2, and then a mechanical configuration for implementing the control method and an example of its control circuit will be described.

FIG. 2 is a schematic diagram showing the arrangement of the rotating cylinders of the apparatus shown in FIG.
The distance from the gripping point a to the plate cylinder bottom dead center b ₁ of the first printing unit 14 is 827 mm, the distance to the plate cylinder bottom dead center b ₂ of the second printing unit 18 is 1387 mm, and the distance in the front in the sheet feeding direction is 827 mm. Assume that the distance to the cylinder bottom dead center bx of any rotating unit is X mm. In this case, the leading edge of the cardboard sheet 32 in the paper feeding device 10 is
When the plate cylinder 12 moves forward by 827 mm, the printing reference point P ₁ of the plate cylinder 12 reaches the bottom dead center b ₁ , and when it moves forward by 1387 mm from point a, the printing reference point P ₂ of the plate cylinder 16 reaches the bottom dead center b _2. Then, if the operating reference point Px of the rotating cylinder reaches the bottom dead center bx when moving forward by X mm from point a, each reference point P ₁ ...Px will be the corresponding bottom dead center b ₁
...This means that it is in sync with bx. Therefore,
Positions P ₁ , P ₂ ...Px on the circumference of each cylinder returned from the bottom dead center position by the corresponding distance in the opposite direction of rotation,
It may be used as a reference point for each cylinder.

Therefore, converting the reference point of P ₁ ...Px into the rotational phase angle θ of each cylinder, since the circumference of each cylinder is 1400 mm as mentioned above, the rotation angle θ ₁ of the plate cylinder 12 = 360×827/ 1400≒212.6° Rotation angle θ ₂ of plate cylinder 16 = 360×1387/1400≒356.6° Rotation angle θx of any cylinder in front = 360×x/1400.

Therefore, each cylinder is adjusted so that when the leading edge of the corrugated cardboard sheet 32 reaches the paper feed start origin a on the paper feed roller 34, the operation reference point _P1 ...Px of each cylinder is at the corresponding reference position (zero point). All you have to do is drive and control the differential mechanism. That is, at this time, a zero point is found at a fixed position outside the cylinder corresponding to the reference point P of each rotating cylinder, and the absolute position value of the cylinder rotation is detected at the zero point Z corresponding to the reference point P unique to each cylinder. It turns out.

By the way, the reference point of this rotating cylinder should originally be determined mechanically as one point on the circumference of the cylinder as described above. However, as described above, the reference point may vary depending on the workpiece to be produced (for example, a corrugated cardboard sheet) or the production machine. Therefore, in the control method according to the present invention, a reference point determined according to a production sheet, etc. is commanded as an absolute position value from the mechanical reference point of the rotary cylinder, and compared with the detected absolute position, and the difference value becomes zero. Thus, the differential motor is controlled to rotate in forward and reverse directions.

In order to perform the tuning control according to the present invention, the sixth
As shown in the example of controlled rotation shown in the figure, the paper feed start origin detection sensor NS ₀ , the reference point detection sensor NS ₁ of each rotating cylinder, and the paper feed unit rotation pulse generator PG ₀ are required as the minimum means for collecting external information. So,
First, its mechanical configuration will be explained. In FIG. 3, the tip of the corrugated cardboard sheet 32 is
An example of the arrangement of sensors for detecting that the sheet feeding start origin a in FIG. 4 has been reached is shown. That is, paper feed device 1
The corrugated cardboard sheets 32 placed in layers on the rotary disk 36 are given a crank motion by a pin 38 eccentrically protruding from the rotating disk 36 and a swinging arm 40 that engages with this pin 38, so that the corrugated cardboard sheets 32 are horizontally moved at non-uniform speed. The sheets 32 are captured by a kicker 42 that repeats a reciprocating motion, and are fed out in the direction of the arrow, starting from the lowest sheet 32.

A pair of upper and lower paper feed rollers 34 are disposed at the front in the sheet feeding direction, and the position where the leading edge of the sheet 32 is gripped by both rollers 34, 34 is shown as the paper feed start origin a. However, the origin of paper feeding does not necessarily have to be at this position, and may be at point a', which is a distance α ahead of point a, as shown in FIG. A rotary plate 46 is coaxially fixed to one of the gear trains 44 for driving the paper feed roller 34, and an arc-shaped projection 48 having a center angle of 180° is arranged and fixed on the rotary disk 46.

A sensor 50 (shown as paper feed start origin detection sensor NS ₀ in FIG. 6) is disposed close to the rotation locus of the arcuate projection 48. In this case, the sheet 3
If the tip of the arcuate protrusion 48 is set to pass in front of the detection head of the sensor 50 in synchronization with this when the tip of the sheet 32 reaches point a, the tip of the sheet 32 will reach point a. The arrival can be detected by the sensor 50. Although a high-frequency oscillation type proximity switch is preferably used as the sensor 50, a magnetic proximity switch (in this case, the arcuate protrusion 48 is made of a magnetic material), a photoelectric switch, etc. may also be used as appropriate. good. in this way,
As shown in FIG. 8, the signal waveform from the sensor 50 having the arcuate protrusion 48 as a proximate object is a pulse waveform with substantially equal on time and off time. However, as explained in connection with the control circuit of FIG.
Since the detection signal of 0 is used with its front edge as a reference and the signal width is only used to determine the operating direction of phase difference correction, each of the on and off times does not need to be 50%.

Also, a rotation pulse generator 51 (indicated by the symbol PG ₀ in FIG. 6) is used to quantize the amount of transport of one corrugated sheet 32 during paper feeding and grasp it as a position value.
is coaxially connected to any gear train 44 that drives the paper feed roller 34. The rotating pulse generator 51 used has a detection unit accuracy of 1.0 mm/pulse, and there is no restriction on the mounting position as long as it can detect the rotation of the paper feed roller 34. . The pulse generator 51
As shown in FIG. 8, the output waveform of (PG ₀ ) is a single pulse train in which one pulse is generated every time the sheet 32 advances by 1.0 mm.

Next, FIG. 4 shows an example of the arrangement of sensors for detecting that the reference point P of each rotating cylinder has reached the corresponding zero point position. In this case, the zero point Z is the paper feeding start origin a for each rotating cylinder, as shown in FIG.
to the bottom dead center b ₁ ...bx, and return to the fixed position outside the cylinder by a predetermined rotation angle in the opposite direction to the rotation direction, with the corresponding bottom dead center b ₁ ... bx as a reference. Desired. The sensor 52 (indicated by reference numeral NS ₁ in the example control circuit of FIG. 6) is connected to the fourth
As shown in the figure, it is disposed at an external fixed position of a proximal body disposed coaxially with the rotating cylinder 12. That is, a drum 56 as a proximal body is coaxially fixed to the rotating shaft 54 of the plate cylinder 12 in the first printing unit 14, and a central angle of 180° is formed on the outer periphery of the drum 56 with the rising edge E as the starting point. Arc-shaped projection 58
are integrally formed.

Then, the reference point of the cylinder (plate cylinder) 12
At the point in time when P ₁ coincides with zero point Z ₁ , the rising edge E of the drum 56 touches the sensor 5 disposed at a fixed position outside the drum via a bracket 60 .
The location is set so that it faces closely to 2. Therefore, the rising edge E of the arcuate protrusion 58 is connected to the sensor 5.
2, the reference point _P1 of the cylinder 12 has returned to the zero point _Z1 . Note that the sensor 52 used here is preferably a sensor employing various detection principles such as a high frequency oscillation type or a magnetic detection type.

FIG. 5 shows an example of a differential mechanism that is intended to be installed in a rotating unit in which the control method according to the present invention is implemented. This figure 5 shows the plate cylinder 12 shown in figure 4.
This schematically shows the shaft support on the opposite side of the plate cylinder 12, and the plate cylinder 12 is rotationally driven by the meshing of a driven gear 62 fixed to the rotating shaft 54 and a driving gear 64. . A differential mechanism 66 (for example, trademark "Harmonic Drive") is attached to the tip of the rotating shaft 54, and its wave generator shaft 68 is connected to a differential motor 74 via gears 70 and 72. . By driving the differential motor 74 in forward and reverse rotation as appropriate, the plate cylinder 12 rotates independently, thereby performing phase adjustment.

Further, a rotary pulse generator 75 (indicated by reference symbol PG ₁ in FIG. 6) having an accuracy of detection unit 1.0 mm/pulse is connected to the wave generator shaft 68. The position difference is detected as a pulse by the rotary pulse generator 75. Note that this rotating pulse generator 75
are arranged as PG ₁ ...PGx for each unit.

Next, FIG. 6 shows an example of a suitable control circuit that can smoothly achieve the synchronization control method for a rotary unit according to the present invention. In Fig. 6, a synchronization control unit SCU is provided for each rotating unit, and circuit elements common to each rotating unit include a binary down counter CNT for indicating the seat position, and a binary data adder.
ADD1 and data switching gate DG are provided. The symbols and corresponding names of the circuit elements from the input to the output in the tuning control unit SCU ₁ are summarized as follows.

PRC...Preset up-down counter ADD2...Binary data adder OCG...Output control gate ZDC...Zero value decoder _A1 to _A3 ...And gate _AM1 to _AM3 ...Amplifier FR, RR, OK...Relay PB...Tuning start Start switch DBC...Data code converter (decimal to binary conversion) APD...Paper feed position indicator PDP...Rotary unit position indicator EDP...Synchronization deviation indicator M...Differential motor (code 74) L...Synchronization completion display Lamp PSW...Numerical setting switch for reference point transition In the printer slotter shown in Fig. 1, the first printing unit 14 is separated from the other second printing unit 18 for printing plate conversion and other maintenance and inspection work. After completing the required work, both units 14,1
Perform 8 connections. At this time, since the plate cylinder 12 has already been rotated by an arbitrary angle, its reference point P ₁ is shifted from the zero point Z ₁ , and a series of printing, grooving, etc. Unable to start work. Therefore, first, the main motor, which serves as a common drive source for each rotary unit, is powered on to rotate each rotary cylinder at the same time. As a result, if the first printing unit 14 is taken as an example, the paper feed start origin detection sensor shown in FIG.
A signal having a waveform shown in FIG. 8 is output from NS ₀ , the reference point detection sensor NS ₁ and the rotational pulse generator PG ₀ of the sheet feeding unit.

In addition, in each synchronized control unit, if the reference point of the rotary cylinder is designed differently for each production sheet as described above, the operator should operate the numerical setting switch PSW for shifting the reference point.
Set in advance the reference point according to the production sheet and the absolute position value from the original reference point unique to the rotating cylinder (if the reference point is not designed to differ depending on the production sheet, this switch PSW Set the value to zero (0).

The output pulse of the paper feed unit rotation pulse generator PG ₀ is input as a down count to the binary down counter CNT, which is a circuit element common to each rotation unit, and the signal of the paper feed start origin detection sensor NS ₀ is input as a down count. A reset has been input. For this reason, _the data bus cdb of the binary down counter CNT is reset to zero value at the front edge of the sensor NS ₀ signal, as shown in FIG. , -1→-2→-3...-n. The pulse generator
As mentioned above, PG ₀ has an accuracy of detection unit 1.0mm/pulse, so one pulse is
Represents a progression of 1.0mm. Therefore, the limit of down-counting due to cumulative pulses is the
It is determined by the circumferential length of the rotating cylinder to which PG ₀ is attached, and in the case of this embodiment, the circumferential length of the cylinder is 1400 mm, so the maximum value is -1399, and after that, the pattern returns to zero.

Therefore, the data bus cdb, which is the output of the binary down counter CNT, can be expressed as a binary code.
There are 12 signal lines (in Figure 7 1,
digits from 0 to 11), this data bus
cdb is input to a binary data adder ADD1 and a data switching gate DG, respectively. In addition, the other input of the binary data adder ADD1 has data of a fixed value of 1400 (in binary value,
MSB010101111000LSB (where MSB represents the highest digit and LSB represents the lowest digit) is connected.
Note that the fixed data value in this case is made to match the circumferential length of the rotating cylinder. In this way, one input of the binary data adder ADD1 is the output data bus cdb of the binary data counter CNT, and
The value changes from 0 to -1399, and the other input is a fixed value of 1400, so when binary data is added in adder ADD1, the output changes from 1400...3 → 2 → 1. Become. This output data bus adb
is shown in FIG. 72.

The output data bus adb of the binary data adder ADD1 and the output data bus cdb of the previous binary down counter CNT are both binary data switching gates.
Input to DG. In addition, a signal from a separate paper feed start origin detection sensor NS ₀ is also input to this gate DG, and the logic of this signal is used to control the data bus.
A switch between adb and cdb is made. That is,
As shown by the arrow in Figure 7, while the NS ₀ signal is on in the rotation range of approximately 180° from the reference point of the rotating cylinder, the data bus cdb is selected and output, and the NS ₀ signal is off. During this time, the data bus _adb is selected and output. (Detailed explanation is omitted).

Therefore, the contents of the output data bus gdb of the data switching gate DG are as shown in FIG. 7. This means that the reference point P of the rotating cylinder is set to zero and changes from 0 to 700 and -699 to 0 according to rotation, and indicates the absolute value from the reference point position.
Therefore, as explained below, if the contents of the output data bus gdb are latched at the operating edges of the reference point signals NS ₁ to NSx for each rotating unit, the direction and amount of deviation in the out-of-sync state can be determined. can be determined.

The tuning control units SCU ₁ to SCUn to which the output data bus gdb is input are provided corresponding to each rotating unit, and all have the same circuit configuration. Only the control unit SCU ₁ will be described.
As mentioned earlier, the tuning control unit SCU ₁ includes the data bus gdb indicating the absolute position of the reference point, the start signal PB of the start switch PB for starting tuning, and the signal ns ₁ of the reference point detection sensor NS ₁ and the differential motor. A signal pg ₁ of a differential rotary pulse generator PG ₁ which is connected to the wave generator shaft 68 in the premises and generates one pulse per 1 mm in terms of displacement on the cylinder circumference.
are input respectively.

First, the preset up/down counter PRC in the control unit SCU ₁ receives the signal ns ₁ from the sensor NS ₁ .
The contents of the data bus gdb are set at the front edge of the circuit, and addition and subtraction are performed using the pulse signal _pg1 . Although not shown, the pulse signal pg ₁ is A,
There is a signal output called B phase with a 90° phase difference, and the 90° phase difference switches alternately depending on the rotation direction of the differential motor M, so depending on the forward/reverse determination of this content,
If the rotation is in the reverse direction, the input is switched to the down input, and if the rotation is in the normal rotation, the input is switched to the up input, and in either case, the input is made to approach the zero value, as shown in FIG.

The output data bus pdb of this preset up-down counter PRC is connected to the next binary data adder.
ADD2 is input, and the other input is the output data bus from the reference point shift numerical setting switch PSW.
ddb goes through data code converter DBC, 10
After the hex value is converted to a binary value, it is connected as the output data bus sdb. This switch PSW
As mentioned earlier, the reference point according to the production sheet is set by the operator as an absolute value from the machine reference point of the rotating cylinder, and if it is a positive value, it is delayed by that value from the machine reference point. , if it is a negative value, the content is to advance the machine reference point by that value. Therefore, binary data according to the settings appears on the output data bus sdb.

The binary data adder ADD2 has no effect when the data bus sdb input thereto has a zero value, but when the data bus sdb has a numerical value, it performs the following operation. For example, if the data bus sdb has an Ns value, it will be added to the Np value indicated by the other data bus pdb, and the binary data adder
The out-of-tuning difference from the reference point, which is the output of ADD2, is (Np
+Ns). As will be explained later, this value is controlled to be zero, so Np + Ns = 0 ∴ Ns = -Np In other words, for the reference point shift value Ns, the same value Np with different polarity is set. Tuning is completed when the data bus pdb becomes as indicated.

The output data bus edb and tuning activation signal pb of the binary data adder ADD2 are input to the output control gate OCG, respectively. This output control gate
The OCG includes a zero value decoder ZDC that determines the zero value of the content indicated by the data bus edb, and AND gates A ₁ to _{A 3}
It consists of Note that the logic of the output data bus edb of the binary data adder is the logic of the highest digit MSB, and when it is "1" it is negative and when it is "0" it is positive.

The MSB signal of this data bus edb is input to AND gate _A2 for forward rotation of the differential motor, and
Negative input is made to AND gate _A3 for differential motor reversal. Further, the zero value decode signal of the zero value decoder ZDC is also inverted input to the AND gates _A2 and _A3 , respectively, and the AND gate for indicating the completion of tuning is also input.
A ₁ has an affirmative input. Furthermore, the tuning start signal
pb is input to AND gates _A1 to _A3 , respectively.

Therefore, when the output data bus edb of the binary data adder ADD2 has a negative value, the MSB signal is "1" as described above, and the pb signal is also "1". Since the output of the zero value decoder ZDC is "0" and is inverted input to the AND gate _A2 , the input condition of the AND gate _A2 is satisfied and a differential motor normal rotation signal is output. This signal is amplified by amplifier _AM1 and drives relay FR, thereby causing differential motor _M1 (74) to rotate in the normal direction. At this time, the other AND gates A ₁ and A ₃ do not operate because the input conditions are not met.

Furthermore, when the data bus edb has a positive value, the MSB signal is "0" and is inverted input to AND gate A ₃ , and the output "0" of the zero value decoder ZDC is also inverted input to AND gate A ₃ , so the input conditions are met. Established, differential motor reverse rotation signal is output. This signal is sent to amplifier AM ₂
is amplified and drives relay RR, and the differential motor
M ₁ (74) is reversed. At this time, the pulse generator
A pulse signal pg ₁ is output from PG ₁ , and the phase direction of the two-phase signal is determined to be normal or reverse. If it is reversed, it is switched to subtract and count, and if it is forward, it is switched to add and count. The value of approaches zero.

When the data bus ddb becomes zero in this way, the output signal of the zero value decoder zdc becomes "1", so the input conditions of AND gates _A2 and _A3 no longer hold, and the differential motor M Forward/reverse rotation signals for ₁ will no longer be output. Instead, the input condition of the AND gate _A1 is satisfied, a tuning completion signal is output and amplified by the amplifier _AM3 , the relay OK is activated, and the tuning completion display lamp _L1 lights up to indicate the completion of tuning.

In addition, there is a display APD that shows the absolute position of the paper feeding status.
Indicator PDP showing the rotational position of each rotating cylinder,
An indicator EDP is provided to show the deviation value of out-of-sync and out-of-synchronization, improving operability and maintenance.

Effects of the Invention Therefore, according to the present invention, even in a mechanical device in which the reference point of the rotating cylinder in each rotating unit is designed differently depending on the size of the workpiece,
By simply setting the reference point as an absolute value from a mechanical reference point specific to the rotating cylinder, the reference points can be automatically synchronized. In terms of corrugated board manufacturing equipment, this means that it can flexibly respond to changes in the reference point accompanying changes in the order of corrugated sheets to be produced, making it highly versatile and capable of handling printing plates, die boards, etc. This eliminates the need to redesign jigs such as the above, and can significantly reduce the burden on the user.

Further, in rotary groove cutting machines such as slotter machines, the flap dimensions to be grooved are the transition values of the reference points described herein. For this reason,
In the conventional slotter device, a separate step was required to move the flap by the dimensional value of the groove cutting length after the synchronization was completed, but according to the control method according to the present invention,
By setting this dimension value as the reference point shift amount in the numerical value setter PSW, the movement of the flap groove cutting length by the dimension value can be achieved at the same time as synchronization, thereby reducing time.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a printer slotter for manufacturing corrugated paperboard sheets as a typical example of a rotary unit compound device, Fig. 2 is a schematic diagram showing the arrangement relationship of the rotary cylinders of the device shown in Fig. 1, and Fig. The figure is a schematic diagram showing an example of the arrangement of a sensor for detecting the starting point of paper feeding and a rotational pulse generator of the paper feeding unit. Figure 4 shows that the unique mechanical reference point of the rotating cylinder has arrived at the corresponding zero point position. FIG. 5 is a schematic perspective view showing an example of the arrangement of sensors for detection, FIG. 5 is a schematic perspective view showing a differential mechanism and a rotary pulse generator disposed on its wave generator shaft, and FIG. 6 is a diagram showing the implementation of the control method according to the present invention. FIG. 7 is a list diagram showing the contents of each output data bus, and FIG. 8 is a timing chart when implementing the tuning control method according to the present invention. 10... Paper feeding device, 12... Plate cylinder, 14... First printing unit, 16... Plate cylinder, 18... Second printing unit, 20... Ruled line head, 22... Creaser unit, 24... Grooving head, 26...
Slotter unit, 28...Rail, 30...Wheel, 32...Cardboard sheet, 34...Paper feed roller, 36...Rotating disk, 38...Pin, 40...
Swinging arm, 42...Kitsuka, 44...Gear train, 46...Rotating disk, 48...Archived projection, 5
0, 52... Sensor, 51... Rotating pulse generator, 54... Rotating shaft, 56... Drum, 58...
Arc-shaped projection, 60... Bracket, 62... Driven gear, 64... Drive gear, 66... Differential mechanism, 68
... Wave generator shaft, 70, 72 ... Gear, 74 ... Differential motor, 75 ... Rotating pulse generator.

Claims (1)

[Claims] 1. A paper feeding device that feeds paper to be processed one by one, and a plurality of rotating cylinders arranged in series to perform required processing on the paper to be processed that is fed from the paper feeding device. , in a rotary unit such as a rotary printing press and a grooving machine composite device, which includes a differential mechanism that adjusts the phase between these rotary cylinders, the position of the paper to be processed is detected based on the signal from the paper feeding device, A reference point should be provided for each rotating cylinder based on the distance between the paper feeder and each rotating cylinder, and should be aligned with the leading edge of the paper so that the rotating cylinders perform the same processing on the paper being processed. Regarding the point,
specifying a position from the reference point, and controlling a differential mechanism provided in each rotating cylinder based on the position of the paper to be processed, the detected position of the rotating cylinder, and the specified position from the reference point; 1. A synchronization control method for a rotary unit, characterized in that an arbitrary point on each rotary cylinder is synchronized with the leading edge of the paper to be processed by operating the rotary unit.