JP7084841B2 - Control device, image information acquisition device system, image pickup control system and printing system - Google Patents

Description

The present invention relates to a control device for controlling an image information acquisition device used in a printing system, an image information acquisition device system, an image pickup control system, and a printing system.

A technique is known in which the position of a recording formed on a long base material is detected by a device placed apart from the recording position. For example, Patent Document 1 describes a recording position detecting mechanism for detecting a recording position of a film to be conveyed, particularly regarding an apparatus for conveying a film of a block copy plotter. In the recording position detection mechanism described in Patent Document 1, the position of the tip of the film at the recording fixed position is detected by the detection unit, and the main scan writing position is corrected by the detected position and the specific position.

Japanese Unexamined Patent Publication No. 2000-016658

In a printing system such as a gravure printing system, while printing on a long base material such as a web that is continuously conveyed, an image of a printed material that is the base material after printing is imaged and the print quality is confirmed from the image capture result. Is possible. In this case, it is conceivable that the imaging position deviates from the printing position at the start of printing, and in order to deal with this deviation, the deviation of the imaging position is corrected by the operation of the operator and the image is taken. However, such an operation requires skill and is not easy. The technique of Patent Document 1 corrects the writing position based on the position of the tip of the film and the specific position, and does not facilitate the photographing of the printed matter after printing. As a result of the study by the present inventor, it was recognized that there is room for improvement in the prior art from the viewpoint of facilitating the imaging of the printed matter after printing.

An object of the present invention has been made in view of such a problem, and an object of the present invention is to provide a technique capable of easily taking an image of a printed body after printing which is continuously conveyed in a printing system.

In order to solve the above problems, the control device of an embodiment of the present invention acquires an image of a predetermined area of a printed body printed by a printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle. It is a control device that controls an image information acquisition device for printing, and controls an image information acquisition device so as to detect a print cycle and acquire an image of a printed body at a timing according to the detection result.

Another aspect of the present invention is an image information acquisition device system. This image information acquisition device system includes an image information acquisition device that acquires an image of a predetermined area of a printed body printed by a printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle, and the control described above. It is equipped with a device.

Yet another aspect of the present invention is an imaging control system. This image pickup control system includes a phase detection sensor that detects the rotational phase of a transfer roll that transfers ink to a substrate that is continuously conveyed, and the above-mentioned control device.

Yet another aspect of the invention is a printing system. This printing system includes a printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle, an image information acquisition device that acquires an image of a predetermined area of a print body printed by the printing unit, and the above-mentioned image information acquisition device. It is equipped with a control device.

It should be noted that any combination of the above components and those in which the components and expressions of the present invention are mutually replaced between methods, systems and the like are also effective as aspects of the present invention.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a technique capable of easily taking an image of a printed body after printing which is continuously conveyed in a printing system.

It is a block diagram which shows the printing system which uses the control device of embodiment. It is a block diagram which shows a part of FIG. 1 enlarged. It is a block diagram which shows the function of the printing system of embodiment. 4 (a) is a view of the base material viewed from the arrow Pb of FIG. 1, and FIG. 4 (b) is an enlarged view of the range Pc of FIG. 4 (a). It is a figure which shows an example of the information held by the operation information storage unit and the information held by the image information storage unit of the embodiment. It is a figure which shows an example of the information which the print information storage part of an embodiment holds. It is a figure for demonstrating the processing performed by the data processing unit of embodiment. It is a graph which shows the misregistration amount of the 2nd printing unit to the 4th printing unit for each order number of a unit area. It is a graph which shows the cumulative misplacement amount from the 1st detection mark to the other detection mark for each order number of a unit area.

[Embodiment]
Hereinafter, the present invention will be described with reference to each drawing based on a preferred embodiment. In the embodiments and modifications, the same or equivalent components and members are designated by the same reference numerals, and duplicate description thereof will be omitted as appropriate. Further, the dimensions of the members in each drawing are shown in an appropriately enlarged or reduced size for easy understanding. In addition, some of the members that are not important for explaining the embodiment in each drawing are omitted and displayed.
Also, terms including ordinal numbers such as 1st and 2nd are used to describe various components, but this term is used only for the purpose of distinguishing one component from other components, and this term is used. The components are not limited by.

In the following description, "parallel" and "vertical" include not only perfectly parallel and vertical, but also cases of deviation from parallel and vertical within the margin of error.

The main configuration of this embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a configuration diagram showing a printing system 10 in which the control device 16 of the embodiment is used. FIG. 2 is a block diagram showing a part of FIG. 1 in an enlarged manner. FIG. 3 is a block diagram showing the functions of the printing system 10. FIG. 4 is a diagram showing a printed base material 12. 4 (a) is a view of the base material 12 seen from the arrow Pb of FIG. 1, and FIG. 4 (b) is an enlarged view of the range Pc of FIG. 4 (a). FIG. 4A shows the detection mark 28 and the identification information 56 printed on the base material 12, and FIG. 4B is an enlargement of the detection marks 28-A to 28-D. The detection mark 28 and the identification information 56 will be described later.

The printing system 10 is for sequentially printing on the base material 12 which is continuously conveyed by a plurality of printing units 14-A to 14-D. The term "printing" as used herein includes not only the case where the ink is transferred so that a predetermined pattern such as a character or a pattern is intermittently formed, but also the case where the ink is transferred so as to be uniformly continuous. Will be printed. The former is performed by, for example, gravure printing or offset printing, and the latter is performed by, for example, a coater. In this embodiment, an example in which the gravure printing system is applied to the printing system 10 will be described.

Although the base material 12 of the present embodiment is a web, it may be a box-making sheet, a sheet, or the like. The base material 12 is supplied from a base material supply mechanism (not shown) and is continuously conveyed using a transport member such as a guide roll (not shown).

The printing system 10 mainly includes a plurality of printing units 14-A to 14-D, an image information acquisition device 58, a control device 16, an information processing device 18, a start signal sensor 52, and an identification information printing unit. It is equipped with 54.

(Printing unit)
The plurality of printing units 14-A to 14-D are sequentially arranged in the transport direction Pa of the base material 12. In this embodiment, four printing units 14-A to 14-D are arranged. Hereinafter, the plurality of printing units 14-A to 14-D are designated as "first, second, third, fourth" and coded as "-A" toward the transport direction Pa of the base material 12. , -B, -C, -D "to distinguish. These are omitted when they are generically referred to. The same applies when distinguishing the components related to each of the plurality of printing units 14-A to 14-D.

The printing unit 14 is for printing on the base material 12 by transferring the ink from the transfer roll 20 to the base material 12. The printing unit 14 of the present embodiment transfers inks of different colors to the base material 12 in each printing unit 14. The transfer roll 20 is set to the same peripheral length Ls in each printing unit 14. In addition to the transfer roll 20, the printing unit 14 mainly includes a drive motor 22 and a rotation detection device 24. The printing units 14-B to 14-D further include a sensor 26.

(Drive motor)
The drive motor 22 is for driving the transfer roll 20. The printing system 10 of the present embodiment employs a sectional drive system in which each transfer roll 20 is independently driven by an individual drive motor 22.

(Rotation detector)
The rotation detection device 24 is connected to the rotation shaft of the drive motor 22. The rotation detection device 24 is for detecting the rotation angle of the transfer roll 20. The rotation detection device 24 may be, for example, an encoder, a resolver, or the like. The rotation detection device 24 of the present embodiment functions as an incremental rotary encoder. The rotation detection device 24 can output an origin pulse signal of one pulse per rotation and an encoder pulse of a plurality of pulses (for example, 1000 pulses) per rotation at a predetermined rotation angle of the transfer roll 20.

(Detection mark)
Before explaining the sensor 26, the detection mark will be described. As shown in FIG. 4A, the detection mark 28 is printed together with one printed image such as a pattern each time the transfer roll 20 rotates once. The detection mark 28 of the present embodiment is a register mark used for register control described later. The detection marks 28 of the present embodiment are printed so as to be arranged in order in the transport direction Pa corresponding to each of the plurality of printing units 14. For example, the first detection mark 28-A is printed by the first printing unit 14, and the second detection mark 28-B is located adjacent to the downstream side of the first detection mark 28-A. It is printed by the print unit 14-B. Further, the third detection mark 28-C is printed by the third printing unit 14 at a position adjacent to the downstream side of the second detection mark 28-B, and the fourth detection mark 28-D is a third. It is printed by the fourth printing unit 14-D at a position adjacent to the downstream side of the detection mark 28-C. It is not essential that the first to fourth detection marks 28-A to 28-D are printed at this position in this order, and these may be printed at different positions in different orders. For example, the first to fourth detection marks 28-A to 28-D may be arranged in this order from the downstream side to the upstream side.

(Sensor)
The sensor 26 is for detecting operation information regarding the printing operation of the printing unit 14. The sensor 26 of the present embodiment detects the amount of misregistration as the operation information of the printing unit 14. As shown in FIG. 4B, the misregistration amount here is the detection printed by the printing unit 14 to which the printing unit 14 belongs from a specific point on the detection mark 28 printed by the printing units 14 adjacent to the upstream side. The distances A2 to A4 to a specific point of the mark 28. The distances A2 to A4 may be expressed as operation information A2 to A4. As shown in FIG. 1, the sensor 26 of the present embodiment is provided on the downstream side (hereinafter, simply referred to as “downstream side”) of the transfer direction Pa from the transfer roll 20 of the printing unit 14 to which the sensor 26 belongs. The sensor 26 of this embodiment is individually provided in the second printing unit 14-B to the fourth printing unit 14-D. It is not essential that the sensor 26 is provided at such a position, and the sensor 26 may be provided at any position as long as the misregistration amount can be detected.

As shown in FIG. 4A, a plurality of base materials 12 (hereinafter, may be referred to as “printing base material 12p”) printed by the base material 12 and the printing unit 14 are directed toward the transport direction Pa. It is divided into unit areas 46 of the above, and is managed for each unit area 46. In this embodiment, the printed substrate 12p exemplifies a printed body. Therefore, the operation information detected by the sensor 26 includes information regarding the printing position of the detection mark 28 printed in each unit area 46 shown in FIG. 4A as a reference mark, and in particular, the operation information. The example operation information includes information about the relative position with another mark printed by another printing unit.

(Image information acquisition device)
As shown in FIG. 2, the image information acquisition device 58 is for acquiring an image in a predetermined range of the printing substrate 12p. The image information acquisition device 58 of the present embodiment functions as an image pickup device. The image information acquisition device 58 of the present embodiment acquires the range of each unit area 46 as a still image. Specifically, the continuously conveyed printing substrate 12p is irradiated with a strobe (not shown) at a predetermined timing, and an image of the printing substrate 12p at that timing is captured by a camera (not shown). Therefore, the image information acquisition device 58 can acquire a still image of each unit area 46.

The image information acquisition device 58 of this example is connected to the control device 16 and acquires an image of the unit region 46 at a timing based on the control of the image acquisition control unit 35 of the control device 16. Further, the image information acquisition device 58 outputs the acquired image as image information to the control device 16. The image acquisition control unit 35 sequentially stores the image information acquired from the image information acquisition device 58 in the image information storage unit 45 of the information processing device 18. Therefore, the image information storage unit 45 stores time-series image information arranged in chronological order. Further, the image information acquisition device 58 of FIG. 2 is also connected to a display (not shown), and the image information can be displayed on the display. The operator can perform a visual inspection based on the still image of the unit area 46 of the printed substrate 12p displayed on the display. That is, the image information acquisition device 58 constitutes a still image capturing device.

Further, the image information acquisition device 58 may send the acquired image as image information to the defect detection device. In this case, the defect detecting device can perform image processing on the image information from the image information acquisition device 58 to detect printing defects such as dust adhering to the unit area 46.

(Functional block)
Each functional block such as the control device 16 and the information processing device 18 shown in FIG. 3 can be realized by an element or a mechanical device such as a CPU (Central Processing Unit) of a computer in terms of hardware, and in terms of software. It is realized by computer programs, etc., but here, the functional blocks realized by their cooperation are drawn. Therefore, it is understood by those skilled in the art who have touched this specification that these functional blocks can be realized in various forms by combining hardware and software. Hereinafter, the configuration of each functional block of the control device 16 and its related operations will be described. The information processing device 18 will be described later.

(Control device)
The control device 16 is for controlling the printing unit 14, the image information acquisition device 58, the identification information printing unit 54, and the marking imparting device (not shown). The control device 16 of FIG. 3 includes a control unit 30, a control information storage unit 32, an identification information print control unit 33, an image acquisition control unit 35, and a marking control unit 37. The control unit 30 controls a plurality of printing units 14. The control information storage unit 32 holds information used for controlling the control unit 30.

(Image acquisition control unit)
The image acquisition control unit 35 acquires image information so as to acquire an image of a predetermined unit area 46 of the printing substrate 12p conveyed from the printing unit 14 that prints on the substrate 12 continuously conveyed in a predetermined cycle. It controls the device 58. Here, the image information acquisition device 58 may acquire an image of the printing substrate 12p at a timing out of phase from the printing position of the unit region 46, and when the image of the printing substrate 12p is acquired at this timing, the image information acquisition device 58 may acquire the image. Since the image in the middle of the continuous unit area 46 is acquired, the entire unit area 46 cannot be displayed, which hinders the visual inspection. Therefore, the image acquisition control unit 35 of the present embodiment controls the image information acquisition device 58 so as to detect the print cycle of the print unit 14 and acquire the image of the print substrate 12p at the timing according to the detection result. do.

The print cycle of the print unit 14 can be detected by acquiring the cycle of the repetitive motion of each part of the print unit 14. In the present embodiment, the printing unit 14 has a transfer roll 20 for transferring ink to the base material 12, and one unit area 46 is printed for each rotation of the transfer roll 20, so that the transfer roll 20 is printed. The rotation cycle can be a print cycle. In particular, in this embodiment, the image information acquisition device 58 is controlled so as to acquire an image of the printing substrate 12p at a timing determined based on the rotation phase of the transfer roll 20. That is, in the present embodiment, the rotation phase of the transfer roll 20 is detected, and the strobe is fired at a timing having a constant phase relationship with the detected rotation phase to perform imaging. This phase relationship may be set experimentally, or may be set by calculation based on the dimensions, distance, transport speed of the base material 12, and the like at various locations.

In this embodiment, the origin pulse signal from the rotation detection device 24 is used as a predetermined phase signal based on the rotation phase of the transfer roll 20. The origin pulse signal in this example is a signal of 1 pulse (= 1 cycle) per rotation of the transfer roll 20, and is a pulse signal having an rising or falling edge at a predetermined rotation angle for each rotation of the transfer roll 20. be.

In order for the image information acquisition device 58 to acquire the entire image of the unit region 46, it is desirable that the imaging range overlaps with the unit region 46 at the time of imaging in the transport direction Pa. For example, the transport distance of the printing substrate 12p from the detection of the origin pulse signal from the rotation detection device 24 to the position where the imaging range overlaps the unit region 46 is acquired, and the printing substrate 12p is conveyed by that distance. You may take an image at the same timing.

Since the transport distance of the printing substrate 12p is proportional to the rotation angle of the transfer roll 20, the transfer distance may be substituted by the rotation angle of the corresponding transfer roll 20. Further, when the transfer roll 20 is rotating at a constant rotation speed, the transport distance is proportional to the transport time of the printing substrate 12p, so that the transport time (= period) corresponding to the transport distance can be used instead. good. From these, in the present embodiment, printing is performed at the timing when the origin pulse signal from the rotation detection device 24 is detected as the phase signal for a predetermined period or at the timing when the transfer roll 20 is rotated by a predetermined rotation angle. The image information acquisition device 58 is controlled so as to acquire an image of the base material 12p.

Regarding the example of FIG. 2, an example of calculating the transport distance y [m] of the printing substrate 12p to the position where the imaging range first overlaps the unit region 46 after detecting the origin pulse signal from the rotation detection device 24. show. In FIG. 2, Eo, Po, and Gp each indicate the position of the transport direction Pa, and Lo, La, a, and b each indicate the distance of the transport direction Pa. The distance from the print point Po of the transfer roll 20 to the image pickup point Gp of the image information acquisition device 58 is indicated by Lo [m], the length of the unit region 46 is indicated by La [m], and from the position Eo where the origin pulse is detected. The transport distance until printing of the unit area 46 is started is indicated by a [m]. The printing point Po is a point where the ink is transferred from the transfer roll 20 to the base material 12. Further, in this example, the length La is equal to the peripheral length Ls for one rotation of the transfer roll 20.

The image acquisition control unit 35 of the present embodiment transports the printing substrate 12p by the distance y [m] shown in the following formula (1) in the transport direction Pa from the position Eo where the origin pulse is detected. , The image information acquisition device 58 is controlled so as to acquire an image of the printing substrate 12p.
y = MOD ((MOD (Lo, Ls) + a), Ls) ... (1)
Further, MOD (h, j) is assumed to indicate a remainder obtained by dividing h by j.
In the equation (1), first the distance Lo is divided by the length Ls to obtain the remainder distance b (see FIG. 2), and the sum of the distance b and the distance a is divided by the length Ls to obtain the remainder. I'm looking for y.
The distance y calculated by the equation (1) is an example, and the image acquisition control unit 35 conveys only the distance obtained by adding an integral multiple of Ls to the distance y from the position Eo where the origin pulse is detected. The image information acquisition device 58 may be controlled so as to acquire an image of the print base material 12p at the timing when the print base material 12p is conveyed to Pa.

Next, an example of a method for realizing the above-mentioned control will be described. In the present embodiment, the transport distance of the printed substrate 12p is acquired by counting the encoder pulses from the rotation detection device 24. When the number of encoder pulses from the rotation detection device 24 is Nb and the total number of pulses per rotation of the rotation detection device 24 is Na, the transport distance of the printed substrate 12p is the value obtained by dividing the peripheral length Ls by the total number of pulses Na. Is a proportionality constant, and is proportional to the number of counting pulses Nb. Therefore, from this relationship, the number of counting pulses Nb corresponding to the distance y can be obtained. The image acquisition control unit 35 controls the image information acquisition device 58 so as to acquire an image of the printing substrate 12p at the timing when the counting pulse number Nb corresponding to the distance y is counted after detecting the origin pulse. I have to. By controlling in this way, the above-mentioned control can be realized.

Next, the effect of the image acquisition control unit 35 of the control device 16 of the present embodiment will be described.
The image acquisition control unit 35 detects the print cycle of the print unit 14, and controls the image information acquisition device 58 so as to acquire the image of the print substrate 12p at the timing according to the detection result, so that the timing of imaging is taken. The trouble of adjustment can be reduced. Further, the image acquisition control unit 35 can control the image information acquisition device 58 so as to acquire an image of the printing substrate 12p at a timing determined based on the rotation phase of the transfer roll 20. In this case, the timing of imaging can be preset before printing is started.

Further, the image acquisition control unit 35 has passed a predetermined period from the time when the phase signal based on the rotation phase of the transfer roll 20 has been detected, or the transfer roll 20 has rotated by a predetermined rotation angle. The image information acquisition device 58 can be controlled to acquire an image of 12p. In this case, a predetermined period or a predetermined rotation angle can be calculated and the timing can be preset before printing is started.

Further, the image acquisition control unit 35 transfers the printing substrate 12p by the distance y shown in the above equation (1) in the conveying direction Pa of the printing substrate 12p from the position Eo where the origin pulse is detected. The image information acquisition device 58 can be controlled to acquire an image of the printing substrate 12p. In this case, since the distance y can be calculated by a simple calculation, the timing can be set in a short time.

Further, the image acquisition control unit 35 of the control device 16 can form an image pickup control system by being combined with a phase detection sensor (rotation detection device 24) that detects the rotation phase of the transfer roll 20. Further, the image acquisition control unit 35 of the control device 16 can form an image information acquisition device system by being combined with the image information acquisition device 58.

(Identification information printing unit)
Next, the identification information printing unit 54 will be described. The identification information printing unit 54 is for printing the identification information 56 in each of the plurality of unit areas 46 according to the control of the control device 16. FIG. 4A shows an example of the printed identification information 56. As shown in FIG. 1, the identification information printing unit 54 of the embodiment is arranged immediately after the sensor 26 of the fourth printing unit 14-D. The identification information printing unit 54 may be arranged at another position within the range from the upstream side of the first printing unit 14-A to the downstream side of the fourth printing unit 14-D. The identification information printing unit 54 of this example is an inkjet printing device that sprays microdropped ink onto the base material 12. The identification information printing unit 54 may be a printing device of another printing method such as laser printing.

The identification information 56 is printed in each unit area 46 in order to identify the plurality of unit areas 46. The identification information may be any as long as it can identify each of the plurality of unit areas 46 included in the base material 12, and is a number, a character, a figure, a symbol, a pattern, a bar code (including a two-dimensional bar code), or a combination thereof. It may include the one that has been used. The identification information 56 of the present embodiment may be generated based on the ordinal number assigned to each unit region 46 in ascending order from the downstream side to the upstream side of the base material 12. By arranging the identification information printing unit 54 immediately after the sensor 26 of the unit 14-D, the identification information 56 has an ordinal number associated with the operation information (misregistration amount) from the sensor 26 of the unit 14-D. Generated on the basis. The identification information 56 may be converted from the ordinal number by a predetermined data process, but in this example, the ordinal number is used as the identification information 56 as it is. The operation information and the ordinal number will be described later.

(Identification information print control unit)
The identification information printing control unit 33 acquires the identification information 56 and controls the identification information printing unit 54 so as to print the identification information 56 at a predetermined position. The identification information printing control unit 33 of the present embodiment acquires the order number from the information processing apparatus 18, and controls the identification information printing unit 54 so as to print the acquired order number in the corresponding unit area 46. The identification information 56 may be printed at a position avoiding the detection mark 28.

(Marking control unit)
When the marking control unit 37 determines that the abnormality is abnormal by the abnormality determination unit 40 because the operation information (misregistration amount) acquired from the printed substrate 12p exceeds a predetermined reference value (for example, 100 μm). , The marking imparting device is controlled so as to make markings in a visible manner on the printed substrate 12p. The marking may be visible and can be removed later. In the present embodiment, the peelable tape piece is attached to the printed substrate 12p as a marking. The abnormality determination unit 40 will be described later.

The control unit 30 is connected to the drive motor 22, the rotation detection device 24, and the sensor 26. The operation information (misregistration amount) detected by the sensor 26 and the rotation angle of the transfer roll 20 detected by the rotation detection device 24 are input to the control unit 30. When the control unit 30 receives the operation information detected by the sensor 26, the control unit 30 stores the operation information in the control information storage unit 32.

The control unit 30 executes registration control that controls the registration adjustment mechanism so that the registration deviation amount becomes smaller based on the registration deviation amount of the printing unit 14. In the present embodiment, the drive motor 22 of the printing unit 14 is used as the register adjustment mechanism, and the register control is executed by correcting the rotation phase of the transfer roll 20 so that the amount of misregistration is small. Since this register control is known, the description thereof will be omitted.

(Information processing device)
The information processing apparatus 18 includes a data processing unit 34, a storage unit 36, an output unit 38, and an abnormality determination unit 40. The storage unit 36 includes an operation information storage unit 42, a print information storage unit 44, and an image information storage unit 45. The data processing unit 34, the output unit 38, and the abnormality determination unit 40 will be described later.

See FIG. 4 (a). As described above, in the present embodiment, information is managed for each unit region 46 of the base material 12. In FIG. 4A, the boundary line of each unit region 46 is shown by a two-dot chain line. The individual unit regions 46 are defined as regions having a constant length in the transport direction Pa with respect to the state in which the base material 12 is transported. When the base material 12 is long in the transport direction Pa as in the web, each region in which the single base material 12 is divided into fixed lengths in the transport direction Pa is regarded as the unit region 46. When the base material 12 is short in the transport direction Pa as in the case of a single leaf, each base material 12 may be regarded as a unit region 46.

In the present embodiment, the length La of the unit region 46 in the transport direction Pa is a length corresponding to the peripheral length Ls for one rotation of the transfer roll 20. The unit area 46 of the present embodiment is regarded as an area including the entire printing substrate obtained after printing by the printing system 10. This printing substrate is obtained by cutting a web printed by the printing system 10 at a predetermined position by a cutting machine (not shown).

FIG. 5 is a diagram showing an example of information held by the operation information storage unit 42 and information held by the image information storage unit 45. The operation information storage unit 42 holds the operation information of each of the plurality of printing units 14. FIG. 5 shows misregistration amounts A2 to A4 as operation information of each of the second printing units 14-B to the fourth printing units 14-D. The image information storage unit 45 holds the acquisition result of each unit area 46 by the image information acquisition device 58 as image information 49.

The operation information storage unit 42 holds the time-series data 48 in which the operation information for each cycle of the print unit 14 is arranged in the cycle order (time-series order). Here, for each of the plurality of printing units 14, the operation in which the transfer roll 20 of the printing unit 14 rotates at a predetermined rotation angle is defined as one cycle. The rotation angles of the transfer rolls 20 required for one cycle in each printing unit 14 are set to the same size. Since the peripheral length Ls of the transfer roll 20 is set to the same size in each printing unit 14, the cycle time required for one cycle in each printing unit 14 is set to the same size. This "predetermined rotation angle" is set so that the peripheral length Ls of the transfer roll 20 corresponding to the rotation angle coincides with the length La of the unit region 46 in the transport direction Pa. In the present embodiment, the operation in which the transfer roll 20 rotates at the rotation angle corresponding to one rotation is defined as one cycle. The operation information storage unit 42 holds the operation information for each cycle of the print unit 14 as a plurality of time-series data 48 collected for each print unit 14.

The image information storage unit 45 holds image information 49 in which acquired images for each cycle of the print unit 14 are arranged in cycle order (time series order). The image information 49 may be image data of a still image obtained by capturing the unit area 46, or may be character information such as a file name that can be linked to the image data. As an example, the image information 49 in FIG. 5 is image data in jpg format.

The time series data 48 and the image information 49 of the operation information of the same unit area 46 will be described. The third printing unit 14-C is arranged downstream from the second printing unit 14-B by S cycles, and the fourth printing unit 14-D is arranged downstream by T cycles from the third printing unit 14-C. It is assumed that the image information acquisition device 58 is arranged downstream from the fourth printing unit 14-D by Q cycles. In this case, each time-series data for one and the same unit region 46 is deviated by this number of cycles. That is, the time-series data 48 of the third print unit 14-C is the data before the S cycle of the time-series data 48 of the fourth print unit 14-D, and the time-series data 48 of the second print unit 14-B is. , The data before the S + T cycle of the time series data 48 of the fourth printing unit 14-D.

Further, for one and the same unit area 46, the image information 49 of the image information acquisition device 58 is the data after the Q cycle of the time series data 48 of the fourth printing unit 14-D. Therefore, the same unit area 46 is obtained by dividing the arrangement interval of each printing unit and the image information acquisition device 58 by the circumference Ls of the transfer roll 20 to convert it into the number of cycles, and shifting each time series data by this number of cycles. Can be associated as data of.

FIG. 6 is a diagram showing an example of information held by the print information storage unit 44. In this figure, the operation information (misregistration amount) of each print unit 14 corresponding to the same unit area 46, the identification information, and the image information are arranged in the order of the order number of the unit area 46 described later. .. The print information storage unit 44 holds print information 50 related to the print contents of the print system 10. The print information 50 includes a plurality of operation information regarding the print operation for the unit area 46 of each print unit 14, an order number indicating the order of the unit areas 46 in the transport direction Pa, and identification for identifying the unit area 46. The information 56 and the image information acquired by imaging the unit region 46 thereof are included. In this example, the ordinal number is used as the identification information 56 as it is.

See FIG. In FIG. 2, Po, Pe, Pf, and Gp indicate positions in the transport direction Pa. Po indicates the position of the printing point of the fourth printing unit 14-D, Pe indicates the position of the sensor 26, Pf indicates the position of the printing point of the identification information printing unit 54, and Gp indicates the position of the printing point of the image information acquisition device 58. Indicates the center position of the range. Lo, Le, and Lf indicate the distances from Gp to Po, Pe, and Pf, respectively. In the example of FIG. 2, the relationship is Lo ≧ Le ≧ Lf.

Next, the number of cycles Q for shifting the image information 49 in order to associate the image information 49 with the time-series data 48 of the fourth print unit 14-D will be described. The image information acquisition device 58 of FIG. 2 is arranged on the downstream side of the sensor 26 of the fourth printing unit 14-D. The image information acquisition device 58 acquires an image of the printing substrate 12p in a range centered on a position separated by a distance Le in the transport direction Pa from the information acquisition position Pe of the sensor 26. When the circumference of the transfer roll 20 is Ls, the number of cycles Q can be calculated as an integer part of the number obtained by dividing the distance Le by the circumference Ls. The information processing apparatus 18 of the present embodiment associates the image information 49 with the operation information acquired in the cycle Q cycle before the cycle in which the image information 49 is acquired. In the example of FIG. 2, the number of cycles Q is set to 2.

(Ordinal number)
Next, the ordinal number will be described. The plurality of operation information includes operation information for each print unit 14 corresponding to each of the plurality of unit areas 46. As described above, the ordinal numbers are assigned to the individual unit regions 46 in ascending order in the anti-transport direction Pa of the substrate 12. The counter-transporting direction Pa here means a direction from the downstream side to the upstream side. The ordinal number of the unit area 46 in the present embodiment indicates the number of sheets counted in the printing order with respect to the plurality of printing base materials 12p obtained after printing the base material 12 by the printing system 10. In the print information 50, the operation information of the individual print units 14 corresponding to the same unit area 46, the order number of the unit areas 46, the identification information 56 of the unit area 46, and the image information of the unit area 46. Is associated with.

(Data processing unit)
Next, the data processing unit 34 will be described. The data processing unit 34 uses the number of orders from the time-series data 48 of the operation information arranged in the cycle order of the plurality of print units 14, and the operation information of each print unit 14 and the identification information 56 for the same unit area 46. And the image information are associated with each other. Further, the data processing unit 34 generates the print information 50 from the operation information, the identification information 56, and the image information associated with each other for the same unit area 46, and stores the print information 50 in the print information storage unit 44. The data processing unit 34 of the embodiment performs the following processing in order to obtain the above-mentioned print information 50. The basic concept of this process will be described below.

FIG. 7 is a diagram for explaining the processing performed by the data processing unit 34 of the embodiment. In this figure, the operation information of the X-th cycle of the p-th printing unit 14 in the transport direction Pa is referred to as Ap-X. X is a natural number of 1 or more.

The length along the transport direction Pa from the printing position of the printing unit 14 (hereinafter referred to as the upstream unit) on the upstream side to the printing position of the printing unit 14 (hereinafter referred to as the downstream unit) on the downstream side is passed. The length is Lc [m]. The printing position of the printing unit 14 here means a position where the transfer roll 20 of the printing unit 14 transfers ink to the base material 12. The transport distance of the base material 12 per cycle is defined as the unit transport distance Ld [m / cycle]. Further, as shown in the following equation (2), the integer portion of the number obtained by dividing the path length Lc by the unit transport distance Ld is defined as the shift number S. The shift number S represents a number close to the number of cycles required for the base material 12 to be conveyed by the path length Lc. Since the peripheral length Ls corresponding to the rotation angle for one cycle of the transfer roll 20 coincides with the length Lb of the unit region 46, the unit transport distance Ld becomes the same as the length Lb [m] of the unit region 46. Therefore, the shift number S is expressed by the following equation (3).
S = INT (Lc / Ld) ... (2)
S = INT (Lc / Lb) ... (3)

For example, as shown in FIG. 7, the shift number S corresponding to the path lengths of the second printing unit 14-B and the fourth printing unit 14-D is 4, and the third printing unit 14 and the fourth printing unit 14- It is assumed that the shift number S corresponding to the path length of D is 2. In this case, the unit area 46 passing through the printing position of the second printing unit 14-B in the 14th cycle is likely to pass through the printing position of the fourth printing unit 14-D after the lapse of four cycles. Similarly, the unit area 46 that passes through the print position of the third print unit 14 in the 16th cycle is likely to pass through the print position of the fourth print unit 14-D after the lapse of two cycles.

This is the operation information A2-14 of the 14th cycle of the second printing unit 14-B, the operation information A3-16 of the 16th cycle of the third printing unit 14-C, which is shown in the black box at the lower left of FIG. 4 It means that the operation information A4-18 in the 18th cycle of the print unit 14-D is likely to be the operation information of the same unit area 46. From another point of view, the operation information of the Xth cycle of the 4th printing unit 14-D, the operation information of the X-2nd cycle of the 3rd printing unit 14, and the X-4 of the 2nd printing unit 14-B. It is highly possible that the operation information of the cycle th is the operation information of the same unit area 46. Therefore, in the present embodiment, the operation information of a specific number of cycles is regarded as the operation information of the same unit area 46 for each of the printing units 14, and the operation information is associated with the operation information. I will explain in more detail.

The data processing unit 34 of the embodiment performs associative processing including the following steps (a), (b) and (c). In step (a) of the present embodiment, the operation information of the Nth printing unit 14 (hereinafter referred to as a reference unit), which is the operation information of the Xth cycle counted from the predetermined start timing, is acquired. Here, N indicates the number of all printing units 14. Since N = 4 in this embodiment, in step (a), the operation information of the Xth cycle is acquired by using the fourth printing unit 14-D as a reference unit.

Further, in step (b), it is the operation information of the m (m ≠ N) th print unit 14 in the transport direction Pa, and the number of shifts S is predetermined from the Xth cycle counted from the above-mentioned start timing. Acquire the operation information in the shifted cycle. Here, m is a natural number other than N among 1 to N. In the present embodiment, in step (b), the operation information of the second printing unit 14-B and the third printing unit 14 is acquired. That is, the operation information of each of the printing units 14 other than the Nth printing unit among the 2nd to Nth printing units 14 is acquired.

A value corresponding to the m-th printing unit 14 is set for this “predetermined shift number S”. The shift number S of the m-th print unit 14 is obtained by using the above-mentioned equation (3) based on the pass length Lc of the reference unit 14 and the m-th print unit 14 and the length Lb of the unit area 46. These path lengths Lc and length Lb are previously held in the storage unit 36.

(Sensor for start signal)
The start signal sensor 52 will be described. The start timing in the present embodiment means the timing when the data processing unit 34 receives the start signal output from another device. As shown in FIG. 1, the printing system 10 of the embodiment includes a start signal sensor 52 for generating this start signal. The start signal sensor 52 of the embodiment can detect a splice point that is a seam of a plurality of base materials 12 (webs), and is arranged immediately before the sensor 26 of the fourth printing unit 14-D. The control unit 30 of the control device 16 outputs a start signal to the data processing unit 34 of the information processing device 18 at the timing when the start signal sensor 52 detects the splice point of the base material 12.

In steps (a) and (b), the data processing unit 34 uses the rotation detection device 24 to specify the number of cycles of operation of each of the plurality of printing units 14. The data processing unit 34 specifies the number of operation cycles of the print unit 14 by using the rotation detection device 24 of the print unit 14. Specifically, the data processing unit 34 has a counter (not shown) that counts up each time it reads that the transfer roll 20 has rotated at a predetermined rotation angle using the rotation detection device 24.

The counter resets the count value to the initial value (for example, 1) at the above-mentioned start timing. The data processing unit 34 acquires the count value of the counter as the number of operation cycles of the print unit 14. The data processing unit 34 of the present embodiment has a counter corresponding to each of the plurality of printing units 14, and acquires the count value of the counter as the number of operation cycles of the corresponding printing unit 14. The data processing unit 34 of the present embodiment independently specifies the number of operation cycles of the print unit 14 for each of the plurality of print units 14.

In step (c), the operation information of each print unit 14 acquired in steps (a) and (b) is associated with the operation information of each print unit 14 with respect to the same unit area 46. By the above association processing, the operation information of each print unit 14 can be associated with the same unit area 46 from the time series data 48 in which the operation information of the plurality of print units 14 is arranged in the cycle order.

The data processing unit 34 associates the operation information of each print unit 14 with respect to the unit area 46 obtained by the above association processing with the order number corresponding to the unit area 46, and further, the operation information via the order number. The print information 50 is generated by associating the identification information 56 with the image information. This ordinal number has a correspondence with the number of cycles. For example, in the present embodiment, at the printing position of the fourth printing unit 14-D, when the splice point of the base material 12 is detected, the first unit area 46 in the entire base material 12 passes through. Therefore, the operation information output from the sensor 26 of the fourth printing unit 14-D in the first cycle corresponds to the first unit region 46 in the entire base material 12. That is, the actual ordinal number of the unit region 46 of the base material 12 and the number of cycles match. Therefore, the operation information of the Xth cycle of the 4th printing unit 14-D may be associated with the same number of ordinal numbers as the number of cycles.

The method of associating the ordinal number with the operation information is not limited to this. For example, a table or expression that defines the correspondence between the number of cycles and the ordinal number is stored in the storage unit 36, the ordinal number is calculated based on the number of cycles using the table or expression, and the calculated value is the ordinal number. May be.

Next, an example of an information processing method using the information processing apparatus 18 of the present embodiment will be described.
The control unit 30 of the control device 16 controls the drive motor 22 and the like so as to sequentially print on the base material 12 by the plurality of printing units 14 while executing the registration control described above. The sensor 26 sequentially detects the operation information (misregistration amount) of the conveyed base material 12, and outputs the operation information to the control device 16 each time the operation information is detected.

The control unit 30 of the control device 16 sequentially stores the operation information output from the sensor 26 in the control information storage unit 32. Each time the control unit 30 stores the operation information of the sensor 26 in the control information storage unit 32, the control unit 30 outputs a strobe signal corresponding to the print unit 14 to which the sensor 26 belongs to the data processing unit 34 of the information processing device 18. In the present embodiment, the strobe signal corresponding to each of the second printing unit 14-B to the fourth printing unit 14-D is output to the data processing unit 34. The sensor 26 of the printing unit 14 outputs operation information (misregistration amount) regarding the unit area 46 once for each cycle, that is, for each rotation of the transfer roll 20 of the printing unit 14 to which the sensor 26 belongs. Along with this, the control unit 30 outputs an individual strobe signal corresponding to each of the second print unit 14-B to the fourth print unit 14-D to the data processing unit 34 for each cycle.

Each time the data processing unit 34 receives the strobe signal output from the control unit 30, the data processing unit 34 acquires the operation information of the latest cycle of the printing unit 14 corresponding to the strobe signal. The data processing unit 34 reads out the control information storage unit 32 of the control device 16 to acquire the operation information of the latest cycle of the print unit 14. The data processing unit 34 associates the acquired operation information of the print unit 14 with the number of cycles and stores it in the operation information storage unit 42. For each of the plurality of print units 14, the data processing unit 34 associates the operation information of the latest cycle of the print unit 14 with the number of cycles for each operation cycle of the print unit 14, and stores the operation information in the operation information storage unit 42. Store once. The data processing unit 34 of the present embodiment generates time-series data 48 in which the operation information of the print unit 14 is arranged in cycle order, and stores the operation information storage unit 42.

The data processing unit 34 associates with the identification information 56 based on the operation information stored in the operation information storage unit 42 for each cycle of the print unit 14. In particular, the data processing unit 34 performs the above-mentioned association processing based on the operation information held in the operation information storage unit 42, and also stores the image information in the operation information via the order number corresponding to the same unit area 46. A process of associating the image information and the identification information 56 held in the 45 is performed. The data processing unit 34 may perform these association processing each time the operation information is stored in the operation information storage unit 42, or may perform the association processing at other timings.

The effect of the above information processing apparatus 18 will be described.
In the print information storage unit 44 of the information processing apparatus 18, the operation information of the individual print units 14 corresponding to the same unit area 46, the order number of the unit areas 46, the identification information 56, and the image information are associated with each other. The printed information 50 is retained. Therefore, the operation information of each print unit 14, the identification information 56, and the image information can be managed in units of ordinal numbers in the unit area 46, and advanced information management can be realized.

For example, when the operation information of the print unit 14 is a misregistration amount, there are the following advantages. The print information 50 includes the misregistration amounts A2 to A4 of each print unit 14 for each order number of the unit area 46. This means that, as shown in FIG. 4B, information for specifying the relative position of all the detection marks 28 for each unit region 46 in the transport direction Pa is included. Therefore, by using these misregistration amounts A2 to A4, the distance from the specific point of the arbitrary detection mark 28 to the specific point of the other arbitrary detection mark 28 can be calculated.

For example, FIG. 8 is a graph showing the misregistration amounts A2 to A4 of the print units 14-B to 14-D for each order number of the unit area 46. Further, FIG. 9 shows the cumulative misregistration amounts A1 → 2, A1 → 3, A1 from the first detection mark 28-A to the other detection marks 28-B to 28-D for each ordinal number of the unit region 46. → It is a graph showing 4. Any of these graphs can be obtained using the print information 50 described above. Using these graphs, it is possible to analyze the tendency of changes in the printing position and the like.

In addition to this, by using the abnormality determination unit 40 described later, it is possible to identify which printing unit 14 is the cause of the abnormality, and what order number the abnormality occurrence location is in. Can be identified. In this way, by obtaining the operation information of the individual print units 14 corresponding to the same unit area 46 and the print information corresponding to the order number of the unit areas 46, various analysis methods for the operation information of the print unit 14 are obtained. Can be converted.

Further, the data processing unit 34 stores the operation information of the plurality of printing units 14 in the operation information storage unit 42 for each cycle, with the operation of one rotation of the transfer roll 20 as one cycle. Normally, the print unit 14 outputs operation information (misregistration amount) in a cycle much shorter than this cycle. Therefore, the amount of data stored in the operation information storage unit 42 can be suppressed rather than sequentially storing the operation information output from the print unit 14.

Further, in the information processing apparatus 18, since the operation information corresponding to the same unit area and the identification information printed in the unit area are associated and stored in the print information storage unit 44, the operation information (register). It is possible to confirm by matching the amount of deviation) with the actual printed substrate. For example, even if the unwinding splice point is unwound and a part of it is discarded and the information of the number of sheets is lost, the identification information is printed, so that the operation information (misregistration amount) is used. It can be easily matched with the actual printed substrate. Further, since the two pieces of information can be confirmed at a glance via the identification information, it is possible to easily confirm the operation information (misregistration amount) and the actual printed base material in a short time. For example, by using the printed identification information, it is possible to easily find a unit area in which the amount of misregistration is larger than the reference value. By visually reconfirming the actual printing state of this unit area, it is possible to support the secondary judgment of whether or not the product can be shipped in a short time.

In particular, by using the marking given to the unit area by the above-mentioned marking giving device in combination, the printing state can be reconfirmed in a shorter time. For example, from the printed substrate, those whose operation information (misregistration amount) exceeds the reference value are selected by using the marking as a mark, and the selected printed substrate is subjected to the corresponding operation information (register) from the printed identification information. The amount of deviation) can be confirmed. Since it is only necessary to confirm the operation information (misregistration amount) of the selected printed substrate, the working time can be shortened.

In addition, the corresponding operation information (misregistration amount) can be confirmed by confirming the printed identification information of the shipped printed matter for which the user has requested improvement, so that the operation information (misregistration amount) can be confirmed. It becomes possible to estimate the user's acceptance level for quantity). Reasonable shipping quality can be achieved by adjusting the reference value of the operation information (misregistration amount) based on the estimated acceptance level.

Further, in the information processing apparatus 18, since the operation information and the image information corresponding to the same unit area are associated and stored in the print information storage unit 44, the operation information (misregistration amount) and the actual printed matter are stored. It can be confirmed by matching with the image information. Therefore, it is possible to easily confirm the correlation between the operation information (misplaced amount) and the image information in the same unit area in a short time.

In particular, by using the marking given to the unit area by the above-mentioned marking giving device in combination, the printing state can be reconfirmed in a shorter time. For example, it is possible to confirm the correlation between the operation information (misregistration amount) and the image information of the printed substrate selected by using the marking as a mark in a short time. By reconfirming the image information visually or the like, it is possible to support the secondary judgment of whether or not the product can be shipped in a short time.

Other features of the information processing apparatus 18 of the embodiment will be described. As shown in FIG. 3, as described above, the information processing apparatus 18 includes an output unit 38 and an abnormality determination unit 40 in addition to the data processing unit 34.

The output unit 38 outputs the print information 50 held in the print information storage unit 44 in a visible manner. The output unit 38 of the present embodiment is a printer, but it may also be a display or the like. The output unit 38 outputs the print information 50 in the form of a table, a graph, or the like.

The abnormality determination unit 40 performs determination processing for determining whether or not there is an abnormality in the printing operation by the print unit 14. The abnormality determination unit 40 performs determination processing based on the operation information of the print information 50 held in the print information storage unit 44, not the operation information held in the control information storage unit 32 of the control device 16.

The abnormality determination unit 40 performs determination processing by comparing the determination threshold value set for the numerical value (misregistration amount) of the operation information of the print information 50 with the numerical value of the operation information. The determination threshold value may be set in advance before the association processing by the data processing unit 34, or may be set after the association processing. When the numerical value of the operation information exceeds the determination threshold value, the abnormality determination unit 40 generates abnormality information indicating that there is an abnormality in the print unit 14 corresponding to the operation information and the unit area 46 of the ordinal number. As shown in FIG. 6, the abnormality determination unit 40 of the present embodiment updates the print information 50 held in the print information storage unit 44 in association with the generated abnormality information. As a result, the presence or absence of an abnormality can be determined by changing the determination conditions even after the printing operation on the base material 12 is completed, and the analysis method regarding the presence or absence of an abnormality can be diversified.

The abnormality determination unit 40 performs the above-mentioned determination process based on the operation information of the plurality of print units 14 for each order number of the unit area 46. Thereby, it is possible to determine whether or not there is an abnormality in the printing operation by the plurality of printing units 14 in the ordinal number unit of the unit area 46. For example, in the example of FIG. 6, it can be specified that the occurrence location of the abnormality having a large misregistration amount is in the 14th to 16th unit areas 46 and the occurrence cause is in the second printing unit 14.

The examples of the embodiments of the present invention have been described in detail above. All of the above-described embodiments are merely specific examples for carrying out the present invention. The contents of the embodiment do not limit the technical scope of the present invention, and many design changes such as changes, additions, and deletions of components are made within the range not deviating from the idea of the invention defined in the claims. It is possible. In the above-described embodiment, the contents that can be changed in such a design are described with the notations such as "in the embodiment" and "in the embodiment", but the contents are designed without such notations. It's not that changes aren't tolerated.

The printing system 10 has been described by taking a gravure printing system as an example, but the specific example thereof is not particularly limited. For example, a coater system, a box making machine system, a sheet-fed machine system, or the like may be used. An example in which the printing system 10 adopts a sectional drive method as a drive method for the transfer roll 20 has been described. This drive system is not particularly limited, and for example, a compensator system may be adopted.

Although the operation information is an example of the misregistration amount of the print unit 14, the specific example thereof is not limited to this. For example, the operation information may be a detected value of the speed, a rotation position, and a torque of the drive motor 22 of the printing unit 14, or may be a deviation between the target value and the detected value.

Although the example in which the length of the transport direction Pa of the unit region 46 is a length corresponding to the peripheral length of one rotation of the transfer roll 20 has been described, the present invention is not limited to this. For example, it may be a length corresponding to the circumference of half a turn of the transfer roll 20.

The data processing unit 34 has described an example of acquiring operation information of the second to Nth print units 14 in the transport direction Pa. In addition to this, the operation information of the first printing unit 14 may be acquired and associated with the operation information of another printing unit 14.

The data processing unit 34 may associate defect information regarding the presence or absence of printing defects with the print information 50 held in the print information storage unit 44. The printing defects here are stains on the base material 12, foreign matter, missing characters, and the like. In this case, the data processing unit 34 may associate the defect information of each unit area 46 with the ordinal number of the unit area 46. In addition to this, information on the quality of the base material 12 handled in ordinal units of the unit area 46 may be associated with the print information 50.

The data processing unit 34 shifts the operation information of the m-th print unit 14 by the S cycle using the time-series data 48 in which the operation information of the print unit 14 is arranged in the cycle order, and shifts the operation information after the shift by the S cycle. An example of associating with the operation information of another print unit 14 has been described. In addition to this, the operation information of the m-th print unit 14 is shifted by the S cycle using the serial input-serial output type shift register, and the operation information after the shift is the operation information of the other print unit 14. May be associated with.

In the embodiment, an example of shifting the number of cycles of another printing unit 14 with reference to the number of cycles of the Nth printing unit 14 has been described. The reference unit 14 that serves as a reference for the number of cycles may be a printing unit 14 other than the Nth. This reference unit 14 is the nth printing unit (n is a natural number of any one of 1 to N). At this time, in step (a), the operation information of the nth print unit in the Xth cycle is acquired, and in step (b), the operation information of the m (m ≠ n) th print unit in the XS cycle. It means that you may get. At this time, in step (b), it is sufficient to only acquire the operation information of one print unit 14 other than the nth print unit 14, or the operation information of each of the plurality of print units 14 other than the nth print unit 14. May be obtained.

In the embodiment, an example has been described in which a start signal that determines the start timing of steps (a) and (b) is output to the data processing unit 34 at the timing when the splice point of the base material 12 is detected. The output timing of this start signal is not particularly limited, and may be output, for example, at the timing when the switch for resetting the number of cycles is operated. Further, the position of the start signal sensor 52 is not particularly limited, and may be arranged immediately before the sensor 26 of the second printing unit 14-B in addition to immediately before the sensor 26 of the fourth printing unit 14-D.

In the embodiment, an example in which the detection mark 28 is a linear figure has been described. The detection mark 28 may be any mark as long as it can detect information about the print position, and may be a mark having a shape different from that of a straight line such as a right triangle.

10 ... printing system, 12 ... base material, 14 ... printing unit, 18 ... information processing device, 20 ... transfer roll, 34 ... data processing unit, 35 ... image acquisition control unit, 38 ... output unit, 40 ... abnormality determination unit, 42 ... operation information storage unit, 44 ... print information storage unit, 45 ... image information storage unit, 46 ... unit area, 50 ... print information, 54 ... identification information printing unit, 56 ... identification information, 58 ... image information acquisition device.

Claims (6)

An image of a predetermined area of a print body printed by a printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle is obtained at a timing corresponding to the detection result by detecting the printing cycle. A control device that controls an information acquisition device.
The printing unit has a transfer roll that transfers ink to the substrate.
From the position where a predetermined phase signal based on the rotation phase of the transfer roll is detected, the base material extends from the printing point of the transfer roll to the center of the image acquisition range of the image information acquisition device in the transport direction of the base material. At the timing of transporting by a distance calculated based on the distance in the transport direction, the peripheral length of the transfer roll, and the transport distance of the substrate from the position where the predetermined phase signal is detected to the start of printing . A control device for controlling the image information acquisition device so as to acquire an image of the printed matter. The image information acquisition device so as to acquire an image of the printed matter at a timing when a predetermined period has elapsed from the time when the predetermined phase signal is detected or when the transfer roll has rotated by a predetermined rotation angle. The control device according to claim 1 , wherein the control device is used. The image of the printed matter is acquired at the timing when the base material is transported by the distance y represented by the formula (1) in the transport direction of the base material from the position where the predetermined phase signal is detected. The control device according to claim 1 , wherein the image information acquisition device is controlled.
y = MOD ((MOD (Lo, Ls) + a), Ls) ... (1)
However, the distance in the transport direction from the print point of the transfer roll to the center of the image acquisition range of the image information acquisition device is Lo, the circumference of the transfer roll is Ls, and the position where the predetermined phase signal is detected. Let a be the transport distance of the base material from 1 to the start of printing.
Further, MOD (h, j) is assumed to indicate a remainder obtained by dividing h by j. An image information acquisition device that acquires an image of a predetermined area of a printing body printed by a printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle, and an image information acquisition device.
An image information acquisition device system comprising the control device according to any one of claims 1 to 3 . A phase detection sensor that detects the rotational phase of the transfer roll that transfers ink to the continuously conveyed substrate,
An imaging control system comprising the control device according to any one of claims 1 to 3 . A printing unit that prints on a continuously conveyed substrate in a predetermined printing cycle,
An image information acquisition device that acquires an image of a predetermined area of a print body printed by the printing unit, and an image information acquisition device.
A printing system comprising the control device according to any one of claims 1 to 3 .

Images