JP2700459B2 - Gate preset device in register adjustment device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate preset device in a register adjusting device for maintaining good registration (hereinafter, register) of each color of a multicolor printing press. 2. Description of the Related Art Conventionally, in a multicolor printing press, a register adjusting device is used to automatically maintain a good registration during printing. This register adjusting device will be described with reference to FIGS. The register adjustment device detects the register adjustment marks 16 printed by the plate cylinders 10 at regular intervals for each color in the margin of the printing pattern of the running paper W by the scanning head 6 provided downstream of each plate cylinder 10. During printing, the position of the compensator roller 12 provided between the plate cylinders 10 is moved so that the register adjustment marks 16 are always printed at a constant interval. Note that the register adjustment marks 16 of the traveling paper W are printed by a register adjustment mark printing unit 15 formed on each plate cylinder 10. Next, the case of a two-color printing machine will be described in detail. As shown in FIG. 6, a scanning head 6a is provided immediately after the second color plate cylinder 10b to detect the first and second color register adjustment marks 16a and 16b of the traveling paper W. Further, between the first color plate cylinder 10a and the second color plate cylinder 10b, the first color plate cylinders 10a and
A compensator roller 12a is provided so that registration can be performed by changing the distance between the printing points of the traveling paper W with the color printing plate cylinder 10b. In the scanning head 6a, mark detection elements 32, 33 are provided at the same intervals as the register adjustment marks 16a, 16b in the traveling direction of the traveling paper W.
Is arranged. The mark detection element 32 detects the first color registration adjustment mark 16a, and the mark detection element 33 detects the second color registration adjustment mark 16b. Here, if the registration of one or two colors is correct, the registration adjustment marks 16a and 16b of one or two colors are printed at the same interval as the scanning head mark detection elements 32 and 33. The register adjustment marks 16a and 16b are simultaneously detected. However, if the register is misaligned, the mark detection elements 32, 33
However, there is a time difference in detecting the register adjustment marks 16a and 16b. Based on the time difference, the register adjuster body calculates the amount of movement of the compensator roller 12a. Then, the compensator roller 12a is moved so that the register adjustment marks 16a and 16b are at a predetermined interval, and the register is controlled to be registered. FIG. 7 shows a four-color printer in detail. Second color cylinder
The scanning head 6b immediately after 10b detects the first and second color register adjustment marks and controls the first compensator roller 12a. In addition, the scanning head immediately after the third color plate cylinder
6c detects the second and third color register adjustment marks and controls the second compensator roller 12b. Similarly, the scanning head 6d immediately after the fourth color plate cylinder detects the third and fourth color register adjustment marks and controls the third compensator roller 12c. That is, the register adjustment marks are detected by the scanning heads 6b, 6C, and 6d, and the gates 37a, 37
From the b and 37c, apply a predetermined gate to register adjustment unit 35
Send to a, 35b, 35c. Next, register adjustment units 35a and 35
b, 35c, each compensator roller 1 via a compensator roller position controller 36a, 36b, 36c.
Controls 2a, 12b, and 12c. In the above-described multicolor printing press, the register adjustment marks of each color are generally arranged at intervals of about 20 mm. Also, each scanning head 6 is not confused with other marks,
A detection signal from each scanning head 6 is gated so that only a predetermined register adjustment mark can be detected. Subsequently, the initial adjustment of the register adjusting device having such a configuration will be described. As shown in FIGS. 8 and 9, the plate cylinders 10a, 1
When attaching 0b and 10c to each printing unit (not shown), a registration misregistration visual mark previously placed at the same position with respect to the pattern in the non-pattern portion of each of the plate cylinders 10a, 10b and 10c.
31a, 31b and 31c (hereinafter referred to as "register marks") are set to the same reference position for each printing unit. In this way, the phases of the plate cylinders 10a, 10b, 10c are adjusted. Next, the compensator roller 12 is adjusted so that the pattern printed on the traveling paper W by the plate cylinders 10a, 10b, and 10c is registered.
Adjust the positions of a and 12b. That is, before the plate cylinders 10a, 10
Since the phases of b and 10c are matched, for example, the first color plate cylinder 10
Contact point (printing point) between a and impression cylinder 11a, second color plate cylinder 10b and impression cylinder 1
The distance of the traveling paper W from the contact point (printing point) with 1b is
The positions of the compensator rollers 12a and 12b are adjusted so as to be an integral multiple of the circumference of a, 10b, and 10c. As a method of adjusting the compensator rollers 12a and 12b, a method of visually observing the actually printed pattern or the above-mentioned register marks 31a, 31b and 31c and adjusting the positions of the compensator rollers 12a and 12b so as to be in register is used. When the pattern printed in this way is registered, the register adjuster 34 gates the detection signal of the scanning head for each register adjustment mark of each color. Next, the predetermined gate position applied to the detection signal from the scanning head 6 will be described. As shown in FIG. 10, as a device for setting the gate position, a signal obtained by superimposing the detection signal from the scanning head 6 on the gate is displayed on an oscilloscope. , And adjusts the detection waveform of the register adjustment mark so as to enter the gate. There is also a device for automatically setting the gate position in the register adjuster 34. As a device for automatically setting the gate position, as shown in FIG.
A mark called an auto gate mark 38 is placed in front of the register mark 16 at a predetermined interval from the register adjustment mark 16, the auto gate mark 38 is detected by the scanning head 6, and a gate is sequentially placed on the register adjustment mark 16 that follows. Some are set automatically. Further, as shown in FIG. 12, the scanning head 6 detects all the patterns including the mark on the scanning line 40, and the register adjustment mark 16
In some devices, the gate is automatically set to a signal that is considered to be a signal of the same type, for example, a signal in which signals of similar shape are arranged at equal intervals. (Problems to be solved by the invention) However, in the above automatic gate setting device,
In the case of using the auto gate mark, there is a problem that it is necessary to put the auto gate mark on the plate cylinder in advance, and it is necessary to recreate the plate cylinder. Further, in a device that sets a gate to a signal that is considered to be a register adjustment mark signal among the detection signals of marks on a scanning line, if there is a mark similar to the register adjustment mark, the mark is erroneously recognized as a register adjustment mark, and this is detected. There is also the danger of gates on On the other hand, when the automatic gate setting position is not used, there is no problem as described above, but it is necessary to perform adjustment while confirming with an oscilloscope for each color at the time of initial adjustment. This adjustment operation is a time-consuming operation even for a skilled operator, and there is a problem that setup (initial adjustment) takes a long time, and the initial adjustment is complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a device capable of accurately and quickly setting a gate position in a register adjustment device. (Means for Solving the Problems) In order to achieve this object, the present invention detects a register adjustment mark of each plate cylinder printed on a running paper by a scanning head using a gate signal set in advance, and In a register adjusting device of a multicolor printing press for moving the position of compensator rollers arranged between the plate cylinders so that the register adjustment marks of the plate cylinder are printed at a constant interval, the initial position of the driving shaft for rotating the plate cylinder is reduced. Reference data input means for inputting the phase and the circumference of the plate cylinder, fixed data storage means for storing the initial position of the register adjustment mark printing section of each plate cylinder and the mounting position of the scanning head, and input from the reference data input means. The register adjustment mark of each plate cylinder printed on the traveling paper passes from the circumference of the plate cylinder to be printed and the data stored in the fixed data storage means, and passes through the scanning head. Of each plate cylinder at the time of printing, the register adjustment mark of each plate cylinder printed on the traveling paper from the calculated phase of each plate cylinder and the initial phase of the driving shaft input from the reference data input means. A driving shaft phase calculating means for calculating a phase at the time of driving when the scanning head passes through the scanning head, and based on the phase of the driving shaft calculated by the driving shaft phase calculating means, only a desired register adjustment mark is read by the scanning head. There is provided a gate preset device in a register adjustment device, comprising: a gate position setting means for setting a timing at which a gate signal is generated by the register adjustment device for detection. (Operation) In the present invention, the initial position of the register adjustment mark printing section of each plate cylinder and the mounting position of the scanning head are stored in the fixed data storage means, and the initial phase of the driving shaft for rotating the plate cylinder from the reference data input means is stored. When the circumference of the plate cylinder is input, the driving shaft phase calculating means prints on the running paper based on the circumference of the plate cylinder input from the reference data input means and the data stored in the fixed data storage means. Calculate the phase of each plate cylinder when the register adjustment mark of each plate cylinder passes through the scanning head, and calculate the calculated phase of each plate cylinder and the initial value of the driving shaft input from the reference data input means. From the phase, the phase of the driving shaft when the register adjustment mark of each plate cylinder printed on the traveling paper passes through the scanning head is calculated, and the phase of the driving shaft calculated by the driving shaft phase calculating means is calculated based on the phase of the driving shaft. Then, the gate position setting means sets a timing for generating a gate signal in the register adjusting device for detecting only the desired register adjusting mark with the scanning head, and thereafter, the register adjusting device is controlled by the gate position setting device. Using the set gate signal, the register adjustment mark of each plate cylinder printed on the traveling paper is detected by the scanning head, and each plate cylinder is printed such that the register mark of each plate cylinder is printed at a constant interval. The position of the compensator roller disposed therebetween is moved. Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an apparatus showing one embodiment of the present invention, and FIG. 2 is a configuration diagram showing a relationship between the apparatus shown in FIG. 1 and a printing press. The same parts are denoted by the same reference numerals. In the drawing, reference numeral 1 denotes a driving shaft phase detector, and as shown in FIG. 2, the rotating shafts 52a, 52b of the plate cylinders 10a, 10b, 10c, 10d,
The phase of the driving shaft 50 connected to 52c, 52d via the gearboxes 51a, 51b, 51c, 51d is detected. Reference numeral 2 denotes a driving shaft phase reading device, which detects the driving shaft 50 detected by the driving shaft phase detector 1.
And the phase data of the driving shaft 50 is given to the computer 3 and the register adjusting device 5 described later. The computer 3 has a driving shaft phase calculating means 3a and a compensator roller position calculating means 3b, and controls the entire apparatus as a whole. Reference numeral 21 denotes a console connected to the computer 3 for inputting the circumference of the plate cylinder, operating commands to the computer 3, and the like. In this embodiment, reference data input means for inputting the initial phase of the driving shaft 50 and the circumference of the plate cylinder by the driving shaft phase detector 1, the driving shaft phase reading device 2 and the console 21 are constituted. Reference numeral 22 denotes a storage device serving as fixed data storage means of the present invention, which is an initial position of a register adjustment mark printing section of each plate cylinder 10a, 10b, 10c, 10d shown in FIG. 2, and each scanning head 6a, 6
Various fixed data determined by the type of printing machine, such as the mounting position of the scanning head 6 constituted by b, 6c, and 6d and the paper path between the plate cylinders 10a, 10b, 10c, and 10d, are stored. The drive shaft phase calculating means 3a includes a plate cylinder circumference inputted from the console 21, and each plate cylinder 10a, 10 stored in the storage device 22.
From the initial position of the register adjustment mark printing section of b, 10c, and 10d and the mounting position data of the scanning head 6, the traveling paper W
The phase of each plate cylinder when the register adjustment mark of each plate cylinder printed on the plate passes through the scanning head 6 is calculated, and the calculated phase of each plate cylinder and the driving force input from the driving shaft phase reading device 2 are calculated. From the initial phase of the shaft 50, the phase of the driving shaft 50 when the register adjustment mark of each plate cylinder printed on the running paper W passes through the scanning head 6 is calculated. Reference numeral 4 denotes a gate position setting device, which generates a gate signal for detecting only a desired register mark with the scanning head 6 based on the phase data of the driving shaft 50 from the driving shaft phase calculating means 3a. Set the timing to make it. The register adjusting device 5 processes the register mark signal of each color input from the scanning head 6 based on the data from the driving shaft phase reading device 2 and the gate position setting device 4, and the scanning head 6 The compensator roller driving circuit 8 (described later) is controlled so as to detect the printed register mark of each color at a predetermined timing. The compensator roller position calculating means 3b includes a storage device 22
, The amount of shift of the initial position of the register adjustment mark printing portion of each plate cylinder 10a, 10b, 10c, 10d, the interval between each register adjustment mark 16 to be printed on the traveling paper W, and the distance between these plate cylinders. The compensator rollers 12a, 12b, which have the register of the pattern of each plate cylinder printed on the traveling paper W from the paper path data of
Calculate the position of 12c. Reference numeral 7 denotes a compensator roller position preset device, which is based on data from the compensator roller position calculating means 3b and drives a motor 14a, 14b, 14c connected to each of the compensator rollers 12a, 12b, 12c. Is set to the amount of movement of each compensator roller. Compensator roller drive circuit 8
Each motor 14 is controlled based on a signal from the register adjustment device 5 or the compensator roller position preset device 7.
a, 14b, 14c to rotate each compensator roller 12a,
Move 12b and 12c. The amount of rotation of each motor, that is, the amount of movement of each compensator roller, is
Detected by a, 13b, and 13c and given to a compensator roller drive circuit, the rotation of each motor stops when each compensator roller moves by a predetermined amount. FIG. 3 is a flowchart showing the control operation of the computer 3 shown in FIG. 1, and FIG. 4 (a) is a schematic diagram for explaining the driving phase calculation by the driving shaft phase calculating means 3a.
FIG. 2B is a schematic diagram showing a state in which the paper path changes when the plate cylinder diameter changes. The operation of the apparatus of the present invention will be described below with reference to the drawings. In this case, the register adjustment mark printing unit 15 of the plate cylinder 10 is stored in the storage device 22 in advance with the drive shaft 50 stopped as a preliminary preparation. ) To be attached to the printing unit. This plate cylinder
The reference position 10 is preferably common to the plate cylinders 10a, 10b, 10c, and 10d, but is not necessarily required to be common to the plate cylinders.
In addition, the registration of the register adjustment mark printing unit 15 of the plate cylinder 10 may be performed by directly aligning the registration adjustment mark printing unit 15 with the designated position of the printing unit. It may be performed indirectly by aligning another mark having a positional relationship (for example, the register mark described above) with the designated position of the printing unit. After the setting of the initial position of the register adjustment mark printing unit 15 of the plate cylinder 10 is completed, an operation command of the computer 3 is given from the console 21. In this state, the process waits for the initial phase θ ₀ of the driving shaft 50 detected by the driving shaft phase detector 3 to be input via the driving shaft phase reading device 2 (S1), and the initial phase θ ₀ is input. Waits for the circumference of the plate cylinder 10 to be input from the console 21 (S2). When the circumference of the plate cylinder 10 is input, the fixed data is read from the storage device 22 (S2).
3). The fixed data stored in the storage device 22 is
Paper path, the initial position of the register adjustment mark printing unit 15 of each plate cylinder 10, the mounting position of the scanning head 6, the interval between each register adjustment mark 16 to be printed on the traveling paper W, the driving shaft 50
And the rotation ratio of the plate cylinder 10. Next, the driving shaft phase calculating means 3a calculates the phase θ of the plate cylinder 10 when the register adjustment mark 16 of the traveling paper W passes right above the scanning head 6 (S4). The calculation of the phase θ of the plate cylinder 10 will be described with reference to FIG. In this case, the position of the register adjustment mark 16 on the traveling paper W when the register adjustment mark printing unit 15 reaches the reference position Q during printing is defined as Q '. First, based on the circumference of the plate cylinder 10 inputted in step S2 and the mounting position of the scanning head 6 read out in step S3, the position S of the scanning head 6 from the contact point between the plate cylinder 10 and the impression cylinder 11, ie, the printing point P, is determined. Is calculated by a method described later. Next, the distance PQ 'is calculated from the position Q and the circumference of the plate cylinder 10, and the register adjustment mark 16 on the traveling paper W is calculated.
Calculates the phase θ of the plate cylinder 10 with respect to the reference point Q when passes through the position of the scanning head 6. That is, assuming that the angle of the arc PQ is θ ₁ and the circumference of the plate cylinder 10 is L, PQ ′ = PQ = (Lθ ₁ / 2π) Q ′S = PS−PQ ′, and the register adjustment mark on the traveling paper W When 16 moves from Q ′ to S, the plate cylinder 10 rotates by an angle θ,
Assuming that the radius of 10 is r, θ = Q ′S / r = (PS−PQ ′) / r = (PS / r) −θ ₁ r = L / 2π, the circumference L of the plate cylinder 10 and the distance PS And the reference position Q is used to calculate the phase θ. Here, the calculation of the distance PS will be described. As shown in FIG. 4 (b), in the plate cylinders 10 and 10 'having different circumferences, the positions of the printing points P, P' change, and the distance from the printing points to the scanning head 6 changes. But distance PS is plate cylinder
It can be determined by 10 circumferences. Therefore, using a relational expression (for example, a quadratic function based on least-squares approximation) between the distance PS obtained by drawing or the like and the circumference of the plate cylinder 10,
The distance PS to the circumference of the plate cylinder 10 to be inputted is calculated.
Further, a table in which the circumference of the plate cylinder 10 is associated with the distance PS may be stored in the storage device 22 in advance, and the distance PS with respect to the circumference of the plate cylinder 10 input using the table may be obtained. . Next, the phase θ of the plate cylinder 10 calculated in this way,
Based on the initial phase θ ₀ of the driving shaft 50 input in step S1 and the rotation ratio between the driving shaft 50 and the plate cylinder 10 read in step S3, the registration adjustment mark 16 on the traveling paper W indicates the position of the scanning head 6. Is calculated (S5). That is, assuming that the rotation ratio between the driving shaft 50 and the plate cylinder 10 is z,
The required phase θg of the driving shaft 50 is θg = θ ₀ + zθ. Next, the compensator roller position calculating means 3b calculates the amount of deviation of the initial position of the register adjustment mark printing unit 15 of each plate cylinder 10 read in step S3, and the amount of each register adjustment mark 16 to be printed on the traveling paper W. From the interval and the paper path data between these plate cylinders, the register adjustment mark 16 of each plate cylinder is
Then, the position of each compensator roller 12 to be printed at a predetermined interval is calculated (S6). In this way, the position of the compensator roller 12 is newly calculated because, when the plate cylinder 10 is attached to the printing unit based on the register adjustment mark printing unit 15, the paper path between the plate cylinders, When the distance between the printing points P of the plate cylinders 10 on the paper W is adjusted to be an integral multiple of the circumference of the plate cylinder 10, the interval between the register adjustment marks 16 printed on the traveling paper W becomes This is because the shift amount of the initial position of the register adjustment mark printing unit 15 of 10 does not coincide with the interval between the register adjustment marks 16 when the pattern printed by each plate cylinder 10 is registered. Here, for the two printing units serving as the reference for register adjustment in the register adjusting device 5, the distance between the printing points P in the registered state is T, the interval between the register adjustment marks 16 is d, and the register adjustment mark Assuming that the shift amount of the initial position of the printing unit is δ, T = nL−δ + d (1) or T = nL−δ−d (2) (N: integer, L: circumference of the plate cylinder 10) Accordingly, the compensator roller position calculating means 3b calculates the position of the compensator roller 12 that satisfies either the above equation (1) or (2). When the initial position of the register mark printing section is set to be the same for each plate cylinder, δ = 0, and the above equations (1) and (2) are as follows. T = nL + d or T = nL-d Here, which of the above equations (1) and (2) is used depends on the positional relationship of the register adjustment marks 16 of each color, but the register adjustment is performed in the traveling direction of the traveling paper W. Expression (2) is used when the marks 16 are arranged in the printing order, and expression (1) is used when the marks 16 are arranged in the opposite direction. When the distance between the printing points P when the compensator roller 12 is at the origin (in this case, the lowermost end is the origin), the distance between the printing points P is an integral multiple of the circumference L of the plate cylinder 10. The position (distance from the origin) x of the compensator roller 12 can be calculated by the following equation. n = INT [l / L] +1 x = (nL-1) / 2 where INT [X] represents the largest integer not exceeding X. Therefore, the position y of the compensator roller 12 for satisfying the above equation (1) or (2) is y = x− (δ−d) / 2 y = x− (δ + d) / 2. The distance l between the printing points P when the compensator roller 12 is at the origin is calculated from the circumference of the plate cylinder 10 by an approximate expression or a table in the same manner as the distance PS. The data of the phase θg of the driving shaft 50 and the position y of the compensator roller 12 calculated as described above are output and given to the gate position setting device 4 and the compensator roller position preset device 7, respectively (S7). Thereafter, based on the phase data of the driving shaft 50 input from the computer 3, the gate position setting device 4 sets the timing for generating the gate signal to be applied to the detection signal from the scanning head 6 in the register adjusting device. Since the gate generally has a predetermined width, the traveling paper W
Assuming that the above gate width is U, the gate signal is generated when the phase of the driving shaft 50 is (θg−α / 2) to (θg + α / 2) where α = U / r. In this way, the gate applied to the detection signal from the scanning head 6 is preset. Also, the compensator roller position presetting device 7
Sets the amount of movement of the compensator roller 12 in the compensator roller drive circuit based on the position data of the compensator roller 12 input from the computer 3.
The compensator roller drive circuit rotates the motor 14 to move the compensator roller 12, and the amount of movement of the compensator roller 12 is detected by the encoder 13 and fed back to the compensator roller drive circuit. Stops, and the presetting of the compensator roller 12 ends. (Effects of the Invention) As described above, in the present invention, the initial position of the register adjustment mark printing section of each plate cylinder and the mounting position of the scanning head are stored in the fixed data storage means, and the plate cylinder is rotated from the reference data input means. When the initial phase of the driving shaft to be driven and the circumference of the plate cylinder are input, the driving shaft phase calculating means is based on the circumference of the plate cylinder input from the reference data input means and the data stored in the fixed data storage means. Calculating the phase of each plate cylinder when the register adjustment mark of each plate cylinder printed on the running paper passes through the scanning head, and inputs the calculated phase of each plate cylinder and the reference data input means. From the initial phase of the driving shaft to be calculated, the phase of the driving shaft when the register adjustment mark of each plate cylinder printed on the traveling paper passes through the scanning head is calculated, and the driving shaft phase calculating means calculates the phase. Based on the phase of the driving shaft, the conventional gate is automatically set in order to set the timing at which the gate position setting means generates the gate signal by the register adjusting device for detecting only the desired register adjusting mark with the scanning head. Compared to the device, there is no danger that an auto gate mark will be put on the plate cylinder in advance, or a mark similar to the register adjustment mark will be mistakenly recognized as a register adjustment mark and gated on it. It is not necessary to make adjustments while checking with an oscilloscope for each color,
This has a remarkable effect that the register position can be set accurately and quickly in the register adjusting device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an apparatus showing an embodiment of the present invention, FIG. 2 is a block diagram showing a relationship between the apparatus shown in FIG. 1 and a printing press, and FIG. FIG. 4 (a) is a flow chart showing the braking operation of the computer 3 shown in FIG. 1, FIG. 4 (a) is a schematic diagram for explaining the driving phase calculation by the driving shaft phase calculating means 3a, and FIG. FIG. 5 is a schematic view showing a state in which the paper path has changed when the paper path has changed, FIG. 5 is a schematic view showing the relationship between a register adjustment mark on a conventional running paper and a plate cylinder, and FIG.
FIG. 7 is a schematic configuration diagram showing a register adjusting device of a color printing press. FIG. 7 is a schematic configuration diagram showing a register adjusting device of a conventional four-color printing press.
The figure is a schematic diagram showing the relationship between the registration marks on the running paper and the plate cylinder,
FIG. 9 is a schematic diagram showing a case where each conventional plate cylinder is set with its register mark at a predetermined position, FIG. 10 is a schematic diagram showing a state of an oscilloscope when setting a conventional gate, and FIG. FIG. 12 and FIG. 12 are schematic diagrams showing gate setting in a conventional apparatus for automatically setting a gate. 1. Drive shaft phase detector 2 Drive shaft phase reading device 3 Computer 3a Drive shaft phase calculation means 3b Compensator roller position calculation means 4 Gate position setting means 5 Register adjustment device 6 ... Scanning head 7 Compensator roller position preset device 8 Compensator roller drive circuit 13 Encoder 14 Motor 21 Console 22 Storage device

Claims (1)

(57) [Claims] The register adjustment mark of each plate cylinder printed on the traveling paper is detected by the scanning head using a preset gate signal, and each plate cylinder is printed such that the register adjustment mark of each plate cylinder is printed at a constant interval. A register adjusting device for a multicolor printing press for moving the position of a compensator roller disposed therebetween, reference data input means for inputting an initial phase of a driving shaft for rotating the plate cylinder and a circumference of the plate cylinder; A fixed data storage unit for storing an initial position of the register adjustment mark printing unit and a mounting position of the scanning head; and a data stored in the circumference of the plate cylinder input from the reference data input unit and the fixed data storage unit. Calculate the phase of each plate cylinder when the register adjustment mark of each plate cylinder printed on the traveling paper passes through the scanning head, and calculate the phase of each of the calculated plate cylinders. Drive shaft phase calculation means for calculating the phase of the drive shaft when the register adjustment mark of each plate cylinder printed on the traveling paper passes through the scanning head from the initial phase of the drive shaft input from the reference data input means, Gate position setting means for setting a timing at which a gate signal is generated by the register adjustment device for detecting only a desired register adjustment mark by the scanning head based on the phase of the drive axis calculated by the drive axis phase calculation means; A gate preset device in a register adjusting device, comprising: