JPH0743912A - Printing plate positioning device for printing plate working device - Google Patents

Abstract

PURPOSE:To suppress an inclination at the time of registiring printing plate. CONSTITUTION:A punching device is a device for executing punching work for at least two printing plates for multicolor printing on which register marks are recorded and provided with cameras 6 and 7 capable of being positioned, a printing plate arrangement table and a control part. In the device 1, after the cameras 6 and 7 are roughly positioned on the resister marks, the control part moves the cameras 6 and 7 so as to make the centers of the resister marks RM matched with the centers of the visual fields of the cameras 6 and 7, based on the photographed states of the resister marks RM by the cameras 6 and 7, to register the first printing plate P1. A printing plate P2 after a first printing plate is registered in such a manner that the cameras 6 and 7 are arranged in the positions of the first printing plate and the printing plate arrangement table is moved based on the photographed states of the resister marks RM by the cameras 6 and 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a printing plate positioning device,
In particular, the present invention relates to a printing positioning device of a printing plate processing device that processes at least two printing plates for multicolor printing on which register marks are recorded.

[0002]

2. Description of the Related Art For example, as a punching device for registering and punching a plurality of printing plates (hereinafter referred to as printing plates) used for multicolor printing in a multicolor printing machine, there has been disclosed a conventional punching device. The thing disclosed by 4-229268 is known. This punching device picks up a printing plate arrangement table that adsorbs and holds a printing plate on which a register mark is printed, and photographs the printed register mark 1
A reading mechanism that has a pair of cameras and that reads the position and shape of the register mark, a punch mechanism that punches punched holes in the positioned plate, and a plate for vertically moving the plate separately to position the plate. It has an up-and-down mechanism.

In this punching device, an operator moves a pair of cameras to perform rough positioning so that a register mark of a printing plate placed on a printing plate placement table falls within the field of view of the camera. When the register mark is in the camera view,
The registration is performed so that the center position of the camera view matches the center position of the register mark. At the time of this registration, the left and right side portions of the plate are moved up and down by a pair of up and down mechanisms. When the registration is completed, the plate is adsorbed on the plate mounting table, and the punch mechanism opens a punch hole at the lower end of the plate.

For the second and subsequent printing plates, a camera is arranged at a position positioned by the first printing plate, and the printing plates are moved in the same manner as the first printing plate to perform registration. Then, when the registration is completed, the punch mechanism punches a punch hole.

[0005]

SUMMARY OF THE INVENTION In the above conventional configuration,
Since the registration of the first printing plate is performed by moving the printing plate, it is common that the tilted posture from the first printing plate is the posture after the registration of the printing plates. Since the registration of the second and subsequent printing plates is also performed by moving the printing plates, the posture of the printing plates after registration is likely to be further inclined.

In this case, the movement amount of the printing position is accumulated for the second and subsequent printing plates, which appears as a prominent inclination posture after the printing plates are registered. If the orientation of the printing plate is extremely tilted, it causes problems such as defective punch hole positions and inability to perform punching operation. An object of the present invention is to suppress the inclination when positioning the printing plate.

[0007]

A printing plate positioning apparatus according to the present invention has at least two register marks recorded therein.
This is an apparatus used for a printing plate processing apparatus that processes a printing plate for multicolor printing of a plate. This apparatus includes a camera, a camera positioning unit, and a printing plate positioning unit.
The camera photographs the register mark. The camera positioning means moves and positions the camera with respect to the printing plate of the first plate based on the photographing state of the register mark of the first plate by the camera. The printing plate positioning means moves and positions the printing plates with respect to the second and subsequent printing plates based on the photographing state of the register marks of the second and subsequent plates by the camera.

A printing plate positioning apparatus according to the second invention is
The storage means, the camera, the camera positioning means, and the printing plate positioning means are provided. The storage means stores a unique camera positioning position corresponding to the type of printing plate. The camera photographs the register mark.
The camera positioning means is for positioning the camera by moving the camera with respect to the first printing plate based on the camera positioning position stored in the storage means. The printing plate positioning means moves and positions the printing plates with respect to the second and subsequent printing plates based on the photographing state of the register marks of the second and subsequent plates by the camera.

[0009]

In the printing plate positioning apparatus according to the first invention, the camera photographs the register mark of the printing plate. And 1
The camera positioning means positions the printing plate of the plate by moving the camera based on the photographing state of the register mark by the camera. Further, for the second and subsequent printing plates, the printing plate positioning means moves and positions the printing plates based on the photographing state of the register mark by the camera.

Here, since the camera is moved and positioned with respect to the first printing plate, the printing plate does not move. As a result, even if the printing plates are moved and positioned after the second plate, the cumulative movement amount becomes smaller than that in the conventional example in which the printing plates are moved from the first plate and positioned. As a result, it is possible to suppress the inclination when the printing plates are registered.

In the printing plate positioning apparatus according to the second aspect of the present invention, the specific camera determined position corresponding to the type of printing plate is stored in the storage means in advance. Then, with respect to the first printing plate, the camera positioning unit moves the camera to perform positioning based on the camera positioning position stored in the storage unit. For the second and subsequent printing plates, the printing plate positioning means moves and positions the printing plates based on the photographing state of the register mark by the camera.

Here, for the printing plate in which the position of the register mark is predetermined, the camera positioning position is stored and the camera is moved to the storage position, so that the positioning of the standard plate becomes easy. . In addition, the cumulative movement amount is smaller than that in the conventional example in which the printing plate is moved from the first plate to perform positioning, and it is possible to suppress the inclination when the printing plates are registered.

[0013]

EXAMPLES In overall configuration diagram 1-3, punching device 1 according to an embodiment of the present invention includes an apparatus main body 2 having an inclined surface 2a to the front,
A plate arrangement table 3 supported by the apparatus main body 2 so as to be movable in X, Y, and θ directions on the inclined surface 2a, and a plate arrangement table 3
A pair of left and right register mark detection units 4 and 5 having CCD cameras 6 and 7 for picking up image of register marks printed on the upper plate P, and a lower punch unit 8 for punching holes on the lower side of the plate P. And an upper punch part 9 for punching holes on the upper side of the plate P, and a bender part 10 for bending the upper side of the plate P.
It is mainly equipped with.

A joystick 11 for instructing movements of the CCD cameras 6 and 7 in the X-axis direction and the Y-axis direction is arranged at the center of the front part of the apparatus main body 2. A touch panel 12 is arranged on the right side of the joystick 11 in FIG. 1. The touch panel 12 has a configuration in which touch keys are arranged on an LCD, for example, and is used for various command inputs. Further, on the left side of the apparatus main body 2 in FIG. 1, CRT displays 13 and 14 for displaying images picked up by CCD cameras 6 and 7 are arranged side by side. As shown in FIG. 4, each part configuration plate arrangement table 3 is a substantially flat plate member having notches for arranging the upper punch 9 and the lower punch 8 on the upper and lower sides. The plate arrangement table 3 has four corners supported by four ball casters 15 attached to the inclined surface 2a and is movable in parallel with the inclined surface 2a. A large number of suction holes 16 for sucking the printing plate are opened in the printing plate arrangement table 3, and the printing plate can be held by suction. The suction hole 16 is connected to the vacuum pump VP (FIG. 18).

Moving mechanisms 17 and 18 are arranged on the inclined surface 2a facing the left and right ends of the plate arrangement table 3. The plate arrangement table 3 can be moved in the Y-axis direction by the moving mechanisms 17 and 18. Also, plate arrangement table 3
A moving mechanism 19 is arranged on the inclined surface 2a facing the center of the upper part of the. The plate arrangement table 3 can be moved in the X-axis direction by the moving mechanism 19. Further, the plate arrangement table 3 is driven by the coordinated driving of the three moving mechanisms 17 to 19.
Is rotatable in the θ direction. The maximum movement amount and the maximum rotation amount are limited to values corresponding to the maximum shift amount of the register mark. For example, the movement amount is ± 10 mm and the rotation amount is ± 5 °.

Since the three moving mechanisms 17 to 19 have basically the same structure, the structure of the moving mechanism 18 will be described here. The moving mechanism 18 includes a motor M2 attached to the inclined surface 2a. The motor M2 is, for example, a pulse motor. A screw mechanism 20 is connected to the motor M2 to move forward and backward by the rotation of the motor M2. At the tip of the screw mechanism 20, the ball caster 2
1 is attached. Opposed to this, a contact member 22 is attached to the back surface of the plate arrangement table 3. In order to keep the contact member 22 in contact with the ball caster 21, a spring 23 is arranged in an extended state between the inclined surface 2 a and the plate arrangement table 3.
As a result, the plate arrangement table 3 is always urged downward in FIG. However, in the moving mechanism 19,
The plate 23 is biased to the right in FIG. 4 by the spring 23.

At the upper part of the plate arrangement table 3 in FIG. 4, a pair of plate push-out parts 24 are arranged at right and left intervals. The plate push-out section 24 has a solenoid SOL as shown in FIG. The plate push-out portion 24 is normally located on the back side of the surface of the table 3 as shown by the solid line, and when the solenoid SOL is excited, it projects as shown by the chain double-dashed line to place the plate P on the plate arrangement table. Three
Away from.

As shown in FIG. 4, a centering device 25 for centering the plate left and right and a plate lower punch 8 (FIGS. 2 and 3) are provided below the plate arrangement table 3. And a printing plate setting unit 26 for setting the printing plate. Further, on the lower side of the plate arrangement table 3, positioning pins 27 for vertically positioning the plate at the time of setting are arranged with a space left and right.

The centering device 25 is provided with two moving members 28 and 29 which are movable in the left and right directions. The moving members 28 and 29 are rod-shaped members that are longer than half of the table 3, and are arranged in parallel with each other and partially overlapped vertically on the base end side (center side). A rack (not shown) is formed on the facing surface of the overlapping portion on the base end side.
Further, on the tip side (left and right end sides) of the moving members 28, 29,
Centering pins 30 and 31 projecting from the table 3 are respectively arranged. A pinion 32 is meshed between the racks of the moving members 28 and 29, and when the pinion 32 rotates, the centering pins 30 and 31 move toward and away from the center reference.

As shown in FIGS. 6 and 7, the plate setting unit 26 has a moving guide 40 protruding downward from the plate arrangement table 3 and a moving pin 41 which is guided by the moving guide 40 and moves vertically. And an air cylinder CYL1 attached to the upper end of the movement guide 40. The rod end of the air cylinder CYL1 is attached to the moving pin 41, and the moving pin 41 is moved between the raised position shown by the solid line in FIGS. 6 and 7 and the lowered position shown by the chain double-dashed line by the air cylinder CYL1. You can move with. Note that this lowered position is below the positioning position of the positioning pin 27.

As shown in FIGS. 1 and 2, the register mark detectors 4 and 5 have a substantially symmetrical structure. Here, the structure of the register mark detection unit 5 will be described. The register mark detection unit 5, as shown in FIGS. 8 and 9,
A camera support portion 44 that supports the right camera 7, a vertically long Y-axis camera mount 45 that supports the camera support portion 44 so as to be movable in the Y-axis direction, and a Y-axis camera mount 45 that is movable in the X-axis direction. A pair of upper and lower X-axis camera mounts 46, 47
And have.

As shown in FIG.
As shown in FIGS. 0 and 11, the base of the sight 48 made of transparent resin is fixed. The sight 48 projects forward from the camera support 44, and a crosshair 49 is provided at the center of the sight 48.
Is drawn. The distance between the center position of the cross line 49 and the center of the camera 7 is, for example, 45 mm. This aim 48
Is used to roughly position the camera 7 on the register mark, and when a predetermined touch key on the touch panel 12 is pressed, the camera 7 moves a predetermined distance so that the register mark is in the field of view of the camera 7. The structure of the sight 48 is
A structure in which the lens is graduated or a cross-shaped mark is attached to the center of the cylindrical member may be used.

The Y-axis camera mount 45, as shown in FIG.
A Y-axis base 50 that is long in the Y-axis direction, and a guide rail 5 that is arranged on the back side surface of the Y-axis base 50 in FIG. 8 along the Y-axis direction.
1 and the guide rail 51 on the rear side of the Y-axis base 50 in FIG.
And a motor M5 connected to the ball screw 52.
In addition, a linear bearing 53 that is movably supported by the guide rail 51 and a ball screw 54 that is screwed into the ball screw 52 are arranged in the camera support portion 44.

The upper X-axis camera mount 46 has an upper X-axis base 55 which is arranged so as to straddle the upper punch 9 and a guide rail 5 which is arranged on the upper X-axis base 55 along the X-axis direction.
6 and 6. Further, a linear bearing 56 a movably supported by the guide rail 56 is disposed on the back surface of the upper end of the Y-axis base 50. The lower X-axis camera mount 47 includes a lower X-axis base 57 arranged across the lower punch section 8, a guide rail 58 arranged on the lower X-axis base 57 along the X-axis direction, and a guide rail. Ball screw 59 disposed on the lower X-axis base 57 in parallel with 58
And a motor M4 connected to the ball screw 59. Further, a linear bearing 58a movably supported by the guide rail 58 and a ball screw 59a screwed to the ball screw 59 are arranged on the back surface of the lower end of the Y-axis base 50. As a result, the Y-axis camera mount 45 moves in the X-axis direction by the motor M4, and the camera support portion 44 moves in the Y-axis direction by the motor M5. The movable range of the camera 7 is shown by a chain double-dashed line in FIG.

The movements of the cameras 6 and 7 to the X axis and the Y axis are performed based on a movement command through the joystick 11. With this joystick 11, the moving speed of the cameras 6 and 7 can be adjusted to fine and coarse movements by the amount of tilt, and the moving direction of the cameras 6 and 7 can be set by the tilt direction. Here, with the joystick 11,
Since the cameras 6 and 7 can be moved in two axes simultaneously, the movement operation of the cameras 6 and 7 at the time of rough positioning is easy. Further, when the mirror mode is set by the touch panel 12, both cameras 6 and 7 move symmetrically, and when not set, only the left camera 6 or the right camera 7 can be moved.

As shown in FIG. 2, the lower punch section 8 is provided with a round hole punch mechanism 60 arranged at the center of the lower end of the plate arrangement table 3 and a space on both sides of the lower end of the plate arrangement table 3. It has two sets of composite punching mechanism 61 for punching the circular and U-shaped punched holes. The compound punch mechanism 61 is
As shown in FIGS. 12 and 13, the punch block 62
And a round hole punch 63 and a U-shaped hole punch 64 arranged in the front end portion of the punch block 62, and a punch lever which holds the round hole punch 63 and the U-shaped hole punch 64 at the front ends and rotates about a shaft 66 as a fulcrum. 65 and an air cylinder CYL2 connected to the base end of the punch lever 65.
The punch block 62 is formed with an insertion groove 67 for inserting the printing plate P. The insertion side end of the insertion groove 67 is chamfered so that the printing plate P can be easily inserted.

The round hole punch mechanism 60 has substantially the same structure as the compound punch mechanism 61 except that there is no U-shaped hole punch, and only the round hole punch 68 is connected to the tip of the punch lever 65. As shown in FIG. 2, the upper punch section 9 has
A punching mechanism 70 for forming punched holes is provided on the left and right sides and the center above the plate arrangement table 3. The punch mechanism 70 arranged at the center forms a round punch hole, and the punch mechanisms 70 arranged on both left and right sides form a notch punch hole. The punch mechanism 70 in the center is shown in FIG.
4 and FIG. 15, a punch base 71 that is vertically movable with respect to the apparatus main body 2, and a punch base 71.
A punch block 72 attached to the punch block 72, a round hole punch 73 arranged in the tip portion of the punch block 72, a punch lever 75 that holds the round hole punch 73 at its tip and rotates about a shaft 74 as a fulcrum, and a punch lever. It has an air cylinder CYL4 connected to the base end of 75 and an air cylinder CYL5 for vertically driving the punch base 71.
The punch block 72 is formed with an insertion groove 78 for inserting a printing plate. The insertion side end of the insertion groove 78 is chamfered for easy mounting.

A linear bearing 76 is attached to the back side of the punch base 71. The linear bearings 76 are the guide rails 7 arranged above and below the apparatus body 2.
It is supported by 7 so as to be vertically movable. Here, the air cylinder CYL5 moves the entire punch base 71 including the punch block 72 along the guide rail 77 between the retracted position indicated by the solid line and the punch position below the retracted position. In addition, the punch mechanism 70 arranged on both the left and right sides,
Although it has the same structure as the central punch mechanism 70, a round hole punch hole 73 is formed as a notch punch.

As shown in FIG. 2, the bender section 10 has a bender frame 80 which is arranged above the plate arrangement table 3 and which is long in the left-right direction. Further vendor 1
As shown in FIGS. 16 and 17, 0 is a bender blade 8 supported by a bender frame 80 so as to be rotatable around a horizontal axis.
1 and a bender die 82 arranged opposite to the bender frame 80.

The bender frame 80 is supported by a guide bar 83 which is orthogonal to the inclined surface 2a so as to be swingable in the direction in which it comes in contact with and separates from the inclined surface 2a. Further, the ends of the air cylinder CYL6 are connected to both ends of the bender frame 80. The air cylinder CYL6 drives the bender frame 80 up and down between a bending position in close contact with the bender die 82 and a retracted position in which it is separated.

The bender blade 81 is a bender frame 80.
Both ends are supported by a rotating pin 84 which is erected in the horizontal direction. Further, drive pins 85 project horizontally from brackets 86 provided at both ends of the bender blade 81. The air cylinder CYL7 is attached to the tip of the drive pin 85.
The tip of is rotatably connected. Air cylinder CY
L7 is a head trunnion type and a vendor frame 8
It is swingably supported by a mounting bracket 87 attached to 0 through a horizontal pin 88. Control Configuration The punching device 1 has a control unit 100 including a microcomputer as shown in FIG. A motor driver 101, an input / output interface 102, a ROM 103, and a RAM 104 are connected to the control unit 100. Various data including a control program are stored in the ROM 103. RAM104 is DRA
It has an M section and an SRAM section. 1 in the DRAM section
The camera position of the plate is temporarily stored. The SRAM unit stores a camera position of a standard version (described later) and a camera position used for reprinting. An alignment buffer 105 and a marking line memory 106 are also connected to the control unit 100, and this control unit 100 determines whether or not the register mark is within the punch hole position allowable range of the printing machine.

The motor driver 101 has a table 3
The driving motors M1 to M3 are connected to the biaxial driving motors M4 and M5 of the right camera 7 and the biaxial driving motors M6 and M7 of the left camera 6. The input / output interface 102 is connected to a vacuum pump VP connected to the suction hole 16, a compressor COP that is a drive source of each air cylinder, each air cylinder CYL1 to CYL7, and a solenoid SOL for pushing out a printing plate. Also, the input / output interface 102 has a joystick 1
1, the touch panel 12 and other input / output units are connected.

An A / D conversion circuit 107 is connected to the left camera 6 and the right camera 7. A / D conversion circuit 107
Converts the obtained image data into digital image data. The A / D conversion circuit 107 is connected to the binarization unit 108. The binarization unit 108 binarizes the obtained digital image data with a predetermined threshold value and converts it into monochrome binary image data. The binarization unit 108 uses the alignment buffer 1
05 is connected. The alignment buffer 105 aligns the binarized image data in the horizontal direction and the vertical direction (row direction and column direction) for each predetermined bit. Then, the aligned image data is given to the control unit 100.

The marked line memory 106 stores image data of a cross line indicating the center of the field of view of each camera and image data of a rectangular line indicating a punch hole position allowable range of the printing machine, which has been input in advance. A superimposing unit 109 is connected to the marked line memory 106. Superimposing part 10
An A / D conversion circuit 107 is also connected to the device 9, and the images captured by the right camera 7 and the left camera 6 and the marked line memory 1
The image data stored in 06 is superimposed. The superimposed image data is separately output to the CRT display 13 and the CRT display 14. Control Operation The operation of the above embodiment will be described with reference to the control flowcharts shown in FIGS. (A) Overall overview When the program starts, first step S in FIG.
Initial setting is made at 1. At the time of this initial setting, the left and right cameras 6 and 7 are at the origin position, the bender frame 80 and the punch base 71 are at the retracted position, and the plate setting unit 2
The moving pin 41 of No. 6 is arrange | positioned at a raising position.

In steps S2 to S9, the touch panel 1
Determine the key input from 2. In step S2, it is determined whether or not a command to select either automatic or manual processing has been issued. In step S3, it is determined whether or not a punching setting / release command has been issued. Step S4
Then, it is determined whether or not a plate bending process selection command is issued. In step S5, a command is issued to set either the mode (camera mode) performed while looking at the displays 13 and 14 or the mode (aiming mode) performed while looking at the sights 48 as the mode at the rough positioning of the cameras 6 and 7. Determine whether or not. In step S6, it is determined whether or not a command to set / cancel the mirror mode is issued. In step S7, it is determined whether or not a command to set the allowable range of the set position of the printing press has been issued. In step S8, it is determined whether or not a command to input a numerical value of the coarse position of the camera has been issued. In step S9, it is determined whether the start switch has been operated.

When a command for selecting either automatic / manual processing is issued, the process proceeds from step S2 to step S10, and the automatic mode or the manual mode is set according to the command. When the punching setting / release command is issued, the process proceeds from step S3 to step S11. In step S11, punching is set or canceled according to the command. Here, either punching only the upper punching section 9, punching only the lower punching section 8 or both punching is selected.

When the plate bending process is selected, the process proceeds from step S4 to step S12. Step S1
In 2, the plate bending process is set or released. When a mode setting command for coarse positioning of the cameras 6 and 7 is issued, the process proceeds from step S5 to step S13. In step S13, the selected mode is set.

When a command to set / cancel the mirror mode is issued, the process proceeds from step S6 to step S14. In step S14, the mirror mode is set or released according to the command. Generally, since the register marks are printed on the printing plate symmetrically, the mirror mode which is easy to operate is generally selected here. If you select the mirror mode and operate the left camera 6 with the joystick 11, the right camera 7 moves symmetrically with it,
The two cameras 6 and 7 can be operated simultaneously.

When a command for setting the allowable range of the set position of the printing press is issued, the process proceeds from step S7 to step S15. In step S15, the input allowable range is set. The set result is stored in the marked line memory 106. Usually, the punch holes for setting in the printing machine have an allowable range of deviation between the plates. For example,
In a certain printing machine, the depth of the U-shaped punch hole from the plate edge is set to 11 mm, and the allowable range is 9 mm.
.About.11.8 mm, the punch holes of the second and subsequent plates are -2 mm based on the positions of the punch holes of the first plate.
It must be opened within a tolerance of +0.8 mm. Therefore, the register marks of the second and subsequent editions are cameras 6,
Even if the register mark is within the field of view and the registration can be performed by image processing, punching holes is useless if the register mark is out of the allowable range. In order to prevent this, an allowable range can be set here.

When a command for inputting a numerical value of the coarse position of the camera is issued, the process proceeds from step S8 to step S16.
In step S16, the coarse position data of the camera, which the operator numerically inputs, is stored in the SRAM section of the RAM 104. If the plate to be processed is a standard plate having a register mark printed on a predetermined position, the numerical value of the coarse position of the camera can be input here. Note that the rough position of the standard camera may be input in advance and selected and designated.

When the operator operates the start switch to perform the machining operation, the process proceeds from step S9 to step S17. In step S17, a machining operation routine described below is executed. (B) Processing operation a) Overall overview In the processing operation routine of step S17, the process waits for the plate P to be set in step S21 of FIG. This plate setting state is determined by an input signal from a sensor (not shown).

When setting the printing plate, the bender unit 10 is arranged in the retracted position and the moving pin 41 is arranged in the raised position, so that the operator first places the upper end of the printing plate in the bender unit 10. It is inserted between the frame 80 and the bender die 81. Then, the rear end of the printing plate is placed on the upper side surface of the moving pin 41. As a result, the printing plate P is supported by the moving pin 41. Here, since the bender frame 80 of the bender unit 10 is arranged at the retracted position and there is a wide gap between the plate arrangement table 3 and the bender frame 80, it is easy to set the plate P.

In step S22, the moving pin 41 of the plate setting unit 26 is lowered to the lowered position. Moving pin 41
When is lowered, the printing plate P is lowered along with the printing plate arrangement table 3, and the lower end is inserted into the insertion groove 67 of the punch block 62 of the lower punch section 8. At this time, since the opening portion of the insertion groove 67 is chamfered, the insertion groove 67
Even if the gap is narrow, the printing plate P can smoothly enter. The lowering of the plate P ends when the lower end of the plate P contacts the positioning pin 27. That is, the vertical position of the printing plate P is determined by the positioning pin 27. Here, plate P
The plate P can be set on the plate arrangement table 3 simply by inserting the upper side below the bender frame 80 and placing the lower side on the moving pin 41, so that the plate P can be set easily.

In step S23, the centering device 2
5 centeres the plate in the left-right direction. Here, by manually rotating the pinion 32, the centering pins 30 and 31 move to center the printing plate P. The pinion 32 may be automatically rotated by using a motor, a sensor, or the like. Step S2
At 4, the process waits for the suction command. The operator makes a printing plate P
If the suction command is issued after confirming the positioning of, the process proceeds to step S25. In step S25, the suction holes 16 are depressurized to adsorb the printing plate P on the printing plate arrangement table 3.

At step S26, an input as to whether or not the plate P to be processed is a reprint is accepted. Here, the re-printing means, for example, punching or plate bending of a set of four plates P, sending them to a printing process, and when printing is started by a printing machine, printing failure on any one plate P, etc. When some trouble of is found, it means a case where only the plate P having the trouble is remade. In this case, it is necessary to process the remade printing plate P under the same registration as that of the printing plate P having the previous defect. That is, the cameras 6 and 7 need to be arranged again at the camera positions used in the previous printing plate P. The command to do this is the reprint command.

If it is not a reprint, the process proceeds from step S26 to step S27. In step S27, the operator waits for a command to start machining. When the start command is issued, the process proceeds to step S28. In step S28, a camera rough positioning routine (described later) is executed. When the execution of the camera rough positioning routine is completed, step S2
In step 9, an automatic registration I routine (described later) is executed. When the automatic registration I routine is completed, a punching operation routine (described later) is executed in step S30. When the punching operation is completed, the process proceeds to step S31.

In step S31, the operator waits for the printing plate P, which has been processed, to be taken out. This decision is
For example, a sensor (not shown) arranged on the plate arrangement table 3 is used. When the printing plate P is taken out, the process proceeds to step S32. In step S32, it waits for the next printing plate P to be set. This determination is similar to step S21. In step S33, the moving pin 41 is lowered to lower the plate P and set it on the lower punch section 8. In step S34, the plate P is centered by the centering device 25. In step S35, the suction command is waited for. When the suction command is issued, the process proceeds to step S36 to start the suction operation.

In step S37, the start command is awaited.
When the start command is issued, the process proceeds to step S38.
In step S38, the left and right cameras 6 and 7 are moved to the camera positions of the first plate. This camera position is determined by the automatic registration I routine described later. In step S39, an automatic registration II routine (described later) is executed. In step S40, a punch operation routine (described later) is executed. When the punching operation is completed, step S4
Move to 1. In step S41, the operator waits for the printing plate P, which has been processed, to be taken out by the operator. Then, in step S42, the operator receives an input as to whether or not there is a next version.

In the normal multicolor printing, there are four color plates P of yellow, magenta, cyan and black, so that there is a next plate until the fourth color plate P is processed.
In this case, the process returns to step S32 to wait for the next printing plate P to be set. If there is no next version (usually the fourth version is completed), the process is terminated and the process returns to the main routine of FIG.

On the other hand, when the instruction to reprint is received in step S26, the process proceeds to step S43. In step S43, the operator inputs the registration number. The registration processing will be described later. In step S44, the camera position data of the received registration number is read from the SRAM section of the RAM 104. Step S4
At 5, the start command is awaited. When the start command is received, the process proceeds to step S38. Here, since the camera position of the designated previous plate is automatically set, the operation at the time of reprinting is easy. b) Camera coarse positioning In FIG. 21 showing the camera coarse positioning routine, in step S51, it is determined whether or not the numerical value of the coarse camera position is already stored. Normally, the numerical value of the camera coarse position is not recorded, but in the case of the standard version, step S16
(FIG. 19) may be recorded in advance. At this time, the camera is positioned based on the numerical value of the camera rough position recorded in step S51B, and this routine is finished as it is.

If No in step S51, the process proceeds to step S52. In step S52, it is determined whether or not the mirror mode is set. If the mirror mode is set, the process proceeds to step S53. In step S53, it is determined whether or not the joystick 11 has been operated. Further, in step S55, it is determined whether or not the operator has issued a rough positioning end command.

When the joystick 11 is operated, the process proceeds to step S54. In step S54, a mirror movement routine for both cameras 6 and 7 is executed. In FIG. 22A showing the mirror movement routine, step S64A
Then, it is determined whether or not the tilt amount of the joystick 11 is larger than a predetermined value. When the tilt amount is smaller than the predetermined value, the process proceeds from step S64A to step S65A, and both cameras 6 and 7 are moved at low speed in a mirror image (symmetrically). Here, the left camera 6 is connected to the joystick 1
Then, the right camera 7 is moved symmetrically with respect to the tilt direction 1. If the tilt amount is larger than the predetermined value, the process proceeds from step S64A to step S66A, and both cameras 6 and 7 are moved at high speed in a mirror image (symmetrically).

Here, since the cameras 6 and 7 can be simultaneously moved by one joystick 11, the workability of the camera operation can be improved. In addition, since the cameras 6 and 7 can be moved simultaneously in the X-axis and Y-axis directions simply by tilting the joystick 11, rough positioning work of the cameras is easy. Further, when the aiming mode (step S13 in FIG. 19) is set, the above-described coarse positioning operation performed by the operator using the joystick 11 is performed by the operator looking at the aiming 48 and printing the aiming 48. P
Do so that it matches the register mark of. In this case, since the register mark drawn on the printing plate P is unlikely to be a shadow of the cameras 6 and 7, rough positioning can be performed quickly and easily. In the rough positioning operation when the aiming mode is not set, the displays 13, 14 are checked while visually checking the positional relationship between the actual cameras 6, 7 and the register marks of the printing plate P.
Refer to the video of the register mark at. In this case, the register mark drawn on the printing plate P is likely to be a shadow of the camera, and rough positioning cannot be performed quickly and easily as in the aiming mode. For example, displays 13 and 14
The display area on the printing plate P displayed in 3 is about 3 to 4 mm square, which is a very small area. Therefore, even if the register mark is arranged below the cameras 6 and 7, the display 13 and 1 are displayed.
The register mark is not easily displayed on 4.

When it is determined in step S55 in FIG. 21 that the operator has issued a rough positioning end command, step S6 is performed.
Move to 2. In addition, when the left camera 6 or the right camera 7 alone performs rough positioning after step S55, the coarse positioning may be performed by appropriately selecting step S57 or step S60 described later.

If the mirror mode is not set, the process proceeds from step S52 to step S56. In step S56, it is determined whether the joystick 11 has been operated. In step S58, it is determined whether the operator has issued a rough positioning end command for the left camera 6. When the joystick 11 is operated, the process proceeds to step S57. In step S57, FIG.
The moving routine of the left camera 6 of 2 (B) is executed. Figure 2
2 (B), in step S64B, it is determined whether the tilt amount of the joystick 11 is larger than a predetermined value. If the tilt amount is smaller than the predetermined value, step S64
The process moves from B to step S65B, and the left camera 6 is moved at a low speed in the tilt direction of the joystick 11. When the tilt amount is larger than the predetermined value, the process proceeds from step S64B to step S66B, and the left camera 6 is moved at high speed in the tilt direction of the joystick 11.

If it is determined in step S58 in FIG. 21 that the operator has issued a rough positioning end command for the left camera 6, the process proceeds to step S59. In step S59, it is determined whether or not the joystick 11 has been operated. In step S61, it is determined whether the operator has issued a rough positioning end command for the right camera 7.

When the joystick 11 is operated, the process proceeds to step S60. In step S60, FIG.
The movement routine of the right camera 7 in (C) is executed. FIG. 22
In (C), in step S64C, it is determined whether the tilt amount of the joystick 11 is larger than a predetermined value. If the tilt amount is smaller than the predetermined value, step S64
The process moves from C to step S65C, and the right camera 7 is moved at a low speed in the tilt direction of the joystick 11. If the tilt amount is larger than the predetermined value, the process proceeds from step S64C to step S66C, and the right camera 7 is moved at high speed in the tilt direction of the joystick 11.

As in the mirror mode, when the aiming mode (step S13 in FIG. 19) is set, the operator also looks at the aiming target 48 and prints the aiming target 48 during the rough positioning operation. It is performed so as to match the register mark of the plate P. Therefore, rough positioning in this case can also be performed quickly and easily. In step S61 of FIG. 21,
If it is determined that the operator has issued the rough positioning end command for the right camera 7, the process proceeds to step S62. The left camera 6 and the right camera 7 may be moved in the reverse order.

In step S62, it is determined whether the aiming mode is set. When the aiming mode is set, coarse positioning of the cameras 6 and 7 is performed with reference to the aiming target 48, and therefore the distance between the center of the aiming target 48 and the center of the field of view of the cameras 6 and 7 (for example, 45 mm), Cameras 6, 7
Need to move. Therefore, in this case, the process proceeds to step S63, and the left and right cameras 6 and 7 are moved by the predetermined distance. On the other hand, when not in aiming mode,
Step S63 is not executed.

When these processes are completed, the process returns to the machining operation routine of FIG. c) Automatic registration I In FIG. 23 showing the automatic registration I routine of step S29 in FIG.
The register mark photographed in 7 and the marked line stored in the marked line memory 106 are displayed on the displays 13 and 14.
FIG. 26 shows an example of the display. In FIG. 26, RL is the marked line of the display 13 (14), PA is the allowable range, and RM
Is a register mark of the printing plate P.

In step S73, the center position of the register mark is detected by image processing. In step S74, it is determined whether or not the register mark has been detected. If the register mark can be detected, the process proceeds from step S74 to step S75. In step S75, the amount of deviation between the center position of the visual fields of the cameras 6 and 7 (center position of the marked line) and the center position of the detected register mark is calculated. In step S76, the cameras 6 and 7 are moved according to the calculated shift amount so that the centers of the fields of view of the cameras 6 and 7 coincide with the centers of the register marks. Step S7
7, the register mark and the marked line are displayed on the display 13,
It is displayed again on 14 (FIG. 26 is an example). Step S78
Then, the register mark is detected again by image processing.
In step S79, the shift amount is calculated again.

In step S80, it is determined whether or not the shift amount has become "0". The processing in steps S76 to S79 is repeated until the displacement amount becomes "0", and when the displacement amount becomes "0", the process proceeds to step S81. In practice, the shift amount may be “0”, but if it is within the predetermined value, the process may proceed to step S81. Step S81
Then, the camera position after the movement is stored in the DRAM section of the RAM 104. In step S82, it is accepted from the operator whether or not the moved camera position is registered for reprinting processing. The command is given by the operator via the touch panel 12. When registering, the process proceeds to step S83, and the registration number is accepted. This registration number may be automatically issued or may be manually input by the operator.
In step S84, the registration numbers are used as file names and the positions of the cameras 6 and 7 are stored in the SRAM section of the RAM 104. When the processing in step S84 ends, the process returns to the machining operation routine.

When it is determined in step S74 that the register mark cannot be detected, the process proceeds to step S85. In step S85, an error is displayed on the displays 13 and 14 or the touch panel 12. Step S8
In No. 6, since automatic registration cannot be performed, it is determined whether or not manual registration is performed. When the registration is not performed manually, the camera is retracted to the original position, the suction is released, and the like, and the process returns to the main routine of FIG. If the registration is performed manually, the process proceeds to step S87. In step S87, the rough positioning routine of FIG.
Manually register. Here, by operating the joystick 11, the register mark 7 and the marked line are manually and accurately registered. When the process of step S87 is completed, the process proceeds to step S81, and the above-mentioned step S8 is performed.
The processing of 1 or less is executed. d) Punch operation In FIG. 24 showing the punch operation routine of step S30 of FIG. 20, in step S91 the automatic mode (FIG.
It is determined whether or not step S10). In the automatic mode, the process proceeds to step S92. In step S92,
It is determined whether or not the lower punching is selected (step S11 in FIG. 19). If the lower punching is selected, the process proceeds to step S93. Step S9
3, the air cylinders CYL2, CY of the lower punch section 8
L3 is advanced and punching operation is performed. If the lower punching is not selected, step S93 is not executed.

In step S94, it is determined whether upper punching is selected (step S11 in FIG. 19). If the upper punching is selected, the process proceeds to step S95. In step S95, the air cylinder CYL5 is retracted, and the punch base 71 of the upper punch section 9 is lowered to the punch position between the bender section 10 and the inclined surface 2a. In step S96, the air cylinder C
The YL4 is advanced to perform the punching operation by the upper punching unit 9. In step S97, the air cylinder CYL5 is advanced to raise the punch base 71 to the retracted position.

Here, the upper punch section 9 is the bender section 1.
In order not to interfere with 0, the upper punch portion 9 advances to the punch position and punches only during the punching operation. The upper punch portion 9 is retracted to the retracted position except when the punching operation is performed. If the upper punch is not selected, steps S95 to S97 are not executed.

In step S98, it is determined whether or not plate bending is selected (step S12 in FIG. 19). When plate bending is selected, step S9
Move to 9. In step S99, as shown in FIG. 27A, the bender frame 80 placed at the retracted position is shown.
By moving the air cylinder CYL6 back and forth, the air cylinder CYL6 is moved to the bender die 82 side as shown in FIG. In step S100, the air cylinder C
The YL7 is retracted, the bender blade 81 is rotated as shown in FIG. 27C, and the upper side of the printing plate P is bent 90 ° by the end of the bender blade 81 and the bender die 82.

In step S101, the air cylinder CY
L7 is advanced and the bender blade 81 is returned to the original position. Then, the air cylinder CYL6 is advanced to raise the bender frame 80 to the original retracted position as shown in FIG. 27 (A). When it is determined in step S98 that the plate bending process is not selected, step S99-
S101 is not executed. Although the lower punching and the upper punching or the plate bending are sequentially performed in order to make the operation easy to understand, they may be performed simultaneously.

In step S102, the left and right cameras 6 and 7 are retracted to the origin position where they do not interfere with the plate P so that the operator can easily take out the plate P. In step S103, the suction of the printing plate P using the suction holes 16 is released. In step S104, the air cylinder CYL1 is retracted, and the moving pin 41 of the plate setting unit 26 is raised to raise the plate P. In step S105,
The solenoid SOL is excited, and the plate P is pushed up from the plate arrangement table 3 by the plate push-out unit 24. As a result, the printing plate can be easily taken out. When the plate extrusion process is completed, the process returns to the processing operation routine of FIG.

On the other hand, if the automatic mode is not set in step S91 and it is determined that the manual mode is set, the process proceeds to step S106. Step S106
Then, based on a command from the operator via the touch panel 12, it is determined whether or not to perform the lower punch. When performing the lower punch, the process proceeds to step S107, and the lower punch operation is performed as in the operation of step S93. In step S108, the touch panel 12
Based on a command from the operator via the, it is determined whether or not to perform the upper punch. When performing the upper punch, the upper punch operation is performed by performing steps S109 to S111 similar to the above steps S95 to S97.

In step S112, the touch panel 12
Based on a command from the operator via the, it is determined whether or not to perform the plate bending operation. When performing plate bending, the process proceeds to step S113, and steps S99 to S1.
The plate bending operation is performed in the same manner as the operation in 01. It is determined whether or not the operator has operated the plate bending key on the touch panel 12. When these processes are completed, the process proceeds to step S102.

In this punch operation routine, the punch operation in the lower punch section 8 and the upper punch section 9 and the bender operation in the bender section 10 are performed automatically or manually.
Here, punching with the lower punch and bending with the bender are performed at the same position without moving the plate P, so that the plate P that has been accurately positioned once is repositioned a plurality of times. Highly accurate and can be done simultaneously. e) Automatic registration II In FIG. 25 showing the automatic registration II routine of step S39 of FIG. 20, in step S121, as shown in FIG. 26, the register mark RM1 (RM2), the allowable range PA, and the marked line RL are set. It is displayed on the CRT displays 13 and 14. By this display, the operator can confirm that the register mark is within the allowable range (register mark RM2 is an example).
Whether or not (register mark RM1 is an example) can be visually recognized.
In step S122, the center position of the register mark is detected by image processing based on the imaging results of the cameras 6 and 7.

In step S123, it is determined whether or not the register mark has been detected. If the register mark can be detected, steps S123 to S124 are performed.
Move to. In step S124, the shift amount between the center position of the visual field of the cameras 6 and 7 and the center position of the detected register mark is calculated. In step S125, it is determined whether the calculated deviation amount is within the allowable range. Here, when the deviation amount is within the allowable range PA as in the register mark RM2 in FIG. 26, step S12
Go to 6.

In step S126, the plate arrangement table 3 is moved in the X and Y axis directions by the motors M1 to M3 and rotated in the θ direction so as to eliminate the deviation amount. In step S127, the register mark, its allowable range, and the marked line are displayed on the displays 13 and 14 as in step S122 (FIG. 26). Step S1
At 28, the center position of the register mark imaged by the cameras 6 and 7 is detected again by image processing. In step S129, the shift amount is calculated again.

In step S130, it is determined whether the calculated shift amount is "0". If the calculated shift amount is not "0", the processes of steps S126 to S129 are repeated until the shift amount becomes "0". When the amount of deviation becomes "0", the process returns to the machining operation routine of FIG. It should be noted that, in practice, if the deviation amount is not "0" but is within a predetermined value, the processing operation routine of FIG. 20 may be returned to.

On the other hand, when it is determined in step S123 that the register mark cannot be read, step S13
Move to 1. In step S131, the display 1
An error display indicating that the data cannot be read is displayed on the touch panel 3, 14 or the touch panel 12. Step S132
Then, it is determined whether or not the registration is manually performed. In the case of manual registration, the process proceeds to step S133, and manual plate positioning is performed. It is possible to position the plate P by moving the plate arrangement table 3 in the X, Y, and θ directions by manual operation from the touch panel 12. When step S133 ends, the process returns to the machining operation routine of FIG. On the other hand, if it is determined in step S132 that the registration is not performed manually, the camera is retracted to the origin position, the suction is released, and the like, and the process returns to the main routine of FIG.

In step S125, the shift amount is within the allowable range PA.
If it is not inside, the process proceeds to step S134. In step S134, if the punching operation is performed as it is, the punching position becomes defective (outside the allowable range), and an error display indicating that the printing machine side cannot normally set is displayed on the display 13, 14 or the touch panel 12.

In step S135, it is determined whether or not the punching operation is forcibly performed. This determination is made based on an input command from the operator via the touch panel 12. When it is determined that the punching operation is forcibly performed, the process returns to the processing operation routine of FIG. 20, and subsequently the punching operation of FIG. 24 is executed (step S40 of FIG. 20). If it is determined that the punching operation is not performed, step S1 in FIG.
Then, the process proceeds to 02 to execute the printing plate take-out process of step S102 and thereafter. In this case, step S9 of FIG.
1 to step S113 are not executed. f) Summary of machining operation When machining is performed according to the machining operation routine as described above, for example, as shown in FIG.
The plate P is bent by 0 and has one round hole H in the center of the upper side, two notches U1 on the left and right sides, and three round holes H and two U-shaped holes U2 on the lower side. To be These punch holes and bent portions are formed without moving the printing plate once positioned with reference to the register mark, so that highly accurate processing can be performed and color misregistration does not easily occur when set in the printing machine. . Further, since the processing is performed after checking the allowable range in the printing machine in advance, the mounting failure in the printing machine hardly occurs.

Further, since the camera is moved for registering for the first plate and the plate is moved for registering for the second plate and thereafter, the accumulated movement amount relating to the processing position is accumulated. Less is. On the other hand, for example, if all the registration processing is performed by moving the printing plate, the amount of movement of the printing position of the register mark is accumulated, and the registration position may be greatly shifted after the second plate.

For example, for two printing plates P1 and P2 having register marks as shown in FIG.
Consider a case where the cameras 6 and 7 roughly positioned as shown in FIGS. 29B-1 and 29C-1 are used for registering and punching. When the printing plate P1 is moved to register the printing plate P1 of the first plate, the printing plate P1 of the first plate is arranged in an inclined state as shown in FIG. 29 (B-2). Subsequently, with respect to the second plate P2 as well, if the plate P2 is moved and registered, as shown in FIG. 29 (B-3),
The plate P2 is positioned with a large inclination. In this case, both printing plates P1, P2 and cameras 6, 7
The amount of movement of the position of (1) accumulates, the positioning posture of the printing plate P2 deteriorates, and processing defects are likely to occur.

On the other hand, when the cameras 6 and 7 are moved to register the plate P1 for the first plate, the plate P1 for the first plate is positioned without tilting as shown in FIG. 29C-2. To be done.
Therefore, even if the plate P2 of the second plate P2 is moved and registered, the inclination of the plate P2 can be small as shown in FIG. 29C-3. In this case,
Since the amount of movement of the position is hard to accumulate, the positioning posture of the printing plate P2 is improved, and the working process can be executed well.

[0081]

In the printing plate positioning apparatus according to the first aspect of the present invention, since the camera is moved and positioned with respect to the printing plate of the first plate, it is possible to suppress the inclination of the printing plate when it is registered. In the printing plate positioning device according to the second aspect of the present invention, for the printing plate whose register mark position is predetermined,
The camera positioning position is stored, and the camera is moved to the storage position. As a result, it is possible to easily position the standard plate, and it is possible to suppress the inclination during registration of the printing plate.

[Brief description of drawings]

FIG. 1 is a perspective external view of a punching device according to an embodiment of the present invention.

FIG. 2 is a schematic front view of the inside.

FIG. 3 is a schematic side view of the inside thereof.

FIG. 4 is a partially cutaway front view of a plate arrangement table.

FIG. 5 is an enlarged cross-sectional view of a plate extrusion unit.

FIG. 6 is a front partial view of a plate setting unit.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a front view of a register mark detection unit.

FIG. 9 is a side view thereof.

FIG. 10 is an enlarged front partial view thereof.

FIG. 11 is a partial sectional view thereof.

FIG. 12 is a side view of a lower punch section.

FIG. 13 is a front partial view thereof.

FIG. 14 is a front view of an upper punch portion.

15 is a sectional view taken along line XV-XV in FIG.

FIG. 16 is a perspective partial view of a bender section.

17 is a sectional view taken along line XVII-XVII of FIG.

FIG. 18 is a block diagram showing the configuration of a control system.

FIG. 19 is a flowchart showing the control operation of the control unit.

FIG. 20 is a flowchart showing the control operation of the control unit.

FIG. 21 is a flowchart showing the control operation of the control unit.

FIG. 22 is a flowchart showing the control operation of the control unit.

FIG. 23 is a flowchart showing the control operation of the control unit.

FIG. 24 is a flowchart showing the control operation of the control unit.

FIG. 25 is a flowchart showing the control operation of the control unit.

FIG. 26 is a schematic diagram showing a display state of a display.

FIG. 27 is a schematic diagram showing the operation of the vendor section.

FIG. 28 is a perspective view showing an example of a processed printing plate.

FIG. 29 is a schematic diagram illustrating a cumulative movement amount.

[Explanation of symbols]

 1 Punching device 3 Plate arrangement table 4, 5 Register mark detection part 6 Left camera 7 Right camera 8 Lower punch part 9 Upper punch part 10 Bender part 11 Joystick 100 CPU

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masayuki Kataoka 1 465 Kuze Tsukiyama-cho, Minami-ku, Kyoto 1 Dainichi Moto Screen Manufacturing Co., Ltd. Kuze factory (72) Inventor Koji Yao 465 Kuze Tsukiyama-cho, Minami-ku, Kyoto Address 1 Dainichi Honsen Screen Manufacturing Co., Ltd. in the Kuze Factory (72) Inventor Norio Morita No. 1 465 Kuze Tsukiyama-cho, Minami-ku, Kyoto City Dainichi Screen Manufacturing Co., Ltd. in Kuze Factory (72) Inventor Sadahide Adachi Kyoto 1 at 465 Kuseikiyama-cho, Minami-ku, Tokyo Dainichi Honsei Co., Ltd. Kuse Factory Co., Ltd.

Claims (2)

[Claims] 1. At least two register marks are recorded.
A printing plate positioning device of a printing plate processing device for processing a printing plate for multicolor printing of a plate, comprising: a camera for photographing the register mark; and a photographing state of the register mark of the first plate by the camera. Camera positioning means for positioning the camera by moving the camera with respect to the first printing plate, and for the second and subsequent printing plates based on the photographing states of the register marks of the second and subsequent plates by the camera A printing plate positioning apparatus for a printing plate processing apparatus, comprising: a printing plate positioning unit that moves and positions the printing plate. 2. At least two register marks are recorded.
A printing plate positioning device of a printing plate processing device for processing a printing plate for multicolor printing of a plate, comprising: storage means for storing a specific camera positioning position corresponding to the type of the printing plate; A camera for photographing the mark, a camera positioning unit for moving and positioning the camera with respect to the printing plate of the first plate based on the camera positioning position stored in the storage unit, and second and subsequent plates by the camera. 2. A printing plate positioning apparatus for a printing plate processing apparatus, comprising: a printing plate positioning unit that moves and positions the printing plates with respect to the second and subsequent printing plates based on the shooting state of the register mark.