JP2014185024A - Device and method for management of chopper phase, program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chopper phase management device that can properly assist work of chopper folding by managing the chopper phase.SOLUTION: A chopper phase management device 1 calculates a print speed for operating a web rotary offset press, and calculates a chopper phase from a rotation signal of a folding cylinder 93 and a driving signal of a chopper blade 101. Then, an approximate curve obtained by approximating the chopper phase with the print speed from these data obtained in the production of good printed matter is calculated, and a speed following curve is created for every print condition. Then, the chopper phase management device 1 pre-sets the speed following curve according to the print condition to the web rotary offset press during operation of the web rotary offset press, and the web rotary offset press sets the chopper phase based on the speed following curve. Also, the chopper phase management device 1 performs warning when the chopper phase during the operation of the web rotary offset press is deviated from a proper range determined from the print speed and the speed following curve.

Description

  The present invention relates to a chopper phase management device that manages a chopper phase in a folding portion of a printing press.

  The offset rotary press is provided with a folding unit that folds the printed paper in conjunction with printing in the printing unit. For example, a chopper folding unit that folds a sheet using a chopper is provided in the folding unit.

  FIG. 9 shows an example of the chopper folding unit 10. In the chopper folding unit 10, after printing, the paper 30 folded to a predetermined size in the previous process is transported on the chopper table 102 in the transport direction indicated by an arrow 108 by a transport belt (not shown). The chopper table 102 is provided with a slit 105 along the conveyance direction, and a stopper 103 is provided at the back in the conveyance direction.

  In the chopper folding unit 10, the paper 30 is folded by the chopper blade 101. That is, the chopper blade 101 reciprocally swings around the shaft 101a in the direction indicated by the arrow 109, contacts the paper 30 when pushed down, and is pushed along the slit 105. Accordingly, the sheet 30 is guided by a guide (not shown) of the slit 105 in a state where the sheet 30 is folded in parallel with the transport direction, and is sucked into the suction folding roller 104. In the chopper folding unit 10, the paper 30 is chopper folded in this way. The chopper-folded paper 30 is sent to a paper discharge unit (not shown) below the suction folding roller 104.

  The chopper blade 101 is adjusted so as to contact the paper 30 when the paper 30 is conveyed on the table 102 and is at a distance D from the stopper 103. The distance D is used as a chopper phase that is a value indicating the timing at which the chopper blade 101 is lowered. If the chopper phase is advanced or delayed from an appropriate value, the paper 30 may not be folded properly by the chopper blade 101 in some cases.

  The number of sheets 30 folded by the chopper folding unit 10 per unit time varies depending on the printing speed in the printing unit, and thus the speed at which the sheet 30 is conveyed by the chopper folding unit 10 varies. Therefore, the chopper phase is adjusted in accordance with the printing speed in order to fold the paper 30 with high accuracy by the chopper folding unit 10. For example, when the printing speed is high and the paper 30 is conveyed at a high speed, it is desirable to keep the chopper phase large in consideration of slipping of the paper 30 when the chopper is folded.

  Such adjustment of the chopper phase is often performed manually by an operator, but various techniques for automatic control have been proposed (see Patent Documents 1 and 2).

  Patent Document 1 describes chopper phase control for smoothly following and correcting the chopper phase of a chopper folding machine in accordance with a change in printing speed. In Patent Document 2, the operation timing of the chopper blade is controlled using a sensor so that the timing when the paper conveyance speed is accelerated and decelerated by a predetermined amount compared to the constant speed, and only when the line speed is constant. In addition, a technique for controlling the operation timing of the chopper blade to an appropriate one during acceleration / deceleration is disclosed.

JP-A-7-53121 Japanese Patent No. 3632006

  However, the technique of Patent Document 1 does not cope with changes in machine accuracy such as changes and deterioration over time, and thus there is a problem that the optimum chopper phase cannot be maintained and the accuracy of chopper folding is lowered.

  Moreover, the technique of patent document 2 has the subject that it is difficult to maintain and manage the precision of the control apparatus containing a sensor etc. by paper dust, apparatus vibration, etc. Therefore, in order to maintain an optimal chopper phase, adjustment by an operator is often required. In the adjustment by the operator, it takes time until the chopper phase reaches an optimum value, and until then, a high-quality printed matter cannot be stably produced.

  Due to the above problems, with the conventional technology, the chopper folding accuracy decreases and the yield deteriorates, the printing speed cannot be increased due to the chopper folding accuracy problem, and the operator takes time to adjust the chopper phase. As a result, productivity may be reduced.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a chopper phase management device and the like that can appropriately assist the chopper folding work by managing the chopper phase.

  According to a first aspect of the present invention, there is provided a chopper phase management apparatus for managing a chopper phase indicating a timing at which a sheet is folded by a chopper blade of a folding portion provided in the printing machine. A chopper phase acquisition unit for acquiring a chopper phase therein, a printing speed acquisition unit for acquiring a printing speed in the printing press, and a chopper phase according to the printing speed of the printing press using the chopper phase and the printing speed. And a relational expression data creating unit that creates relational expression data indicating the relation between the printing speed and the chopper phase.

  According to the first invention, the chopper phase management device collects printing speed and chopper phase data in an operating printing press, and creates relational expression data indicating the relationship between the printing speed and the chopper phase. By using this for the management of the chopper phase according to the printing speed, it is possible to reduce the labor of adjusting the chopper phase. Furthermore, since the relational expression data can be created and updated using the latest data of the printing press, even if the relation between the printing speed and the chopper phase changes due to aging of the printing press, there is data that reflects this As a result, the chopper phase can be managed with high accuracy in accordance with the current state of the printing press. As described above, the yield and productivity of printed matter can be improved.

The relational expression data is preferably created for each printing condition.
Thereby, when the printing press is in operation, relational expression data having the same printing conditions as the printed matter to be produced can be used, and chopper phase management with high accuracy according to the printing conditions can be performed.

The chopper phase management device according to the first aspect of the invention preferably further includes a preset unit that inputs the relational expression data corresponding to printing conditions in the printing press to the printing press.
Accordingly, since an appropriate chopper phase can be set from the beginning of operation without adjusting the chopper phase by an operator, the time for test printing or the like can be shortened and productivity can be increased.

The chopper phase management device according to the first aspect of the invention is a warning unit that issues a warning when the chopper phase is out of an appropriate range of the chopper phase determined from the printing speed and the relational expression data during operation of the printing press. It is desirable to provide further.
In this way, while the press is operating, warning that the chopper phase is out of the proper range allows the operator to efficiently perform maintenance such as machine maintenance or adjustment of printing speed and chopper phase according to the warning. This can be done well, leading to improved machine availability and reduced yield.

Further, it is preferable that the relational expression data creation unit uses the chopper phase and the printing speed when the printed material after being folded by the chopper blade is a non-defective product to create the relational expression data.
By creating the relational expression data using the data when the folding process is properly performed, the relational expression data with higher reliability can be created.

The printing condition preferably includes at least one of a paper type and a paper folding method.
Of the printing conditions, the paper type and folding conditions are important. For example, a coated paper whose surface is coated and a non-coated paper that is not coated have different slipping properties during paper conveyance, and therefore have an appropriate chopper phase. Also, depending on how the paper is folded, the operation of the folding portion and the slipping property at the time of conveyance are different, so that the appropriate chopper phase is also different. Therefore, if the relational expression data is created according to these factors, the chopper phase can be suitably managed.

  The second invention is a chopper phase management device for managing a chopper phase indicating a timing at which a sheet is folded by a chopper blade of a folding portion provided in a printing machine, and acquiring a chopper phase during operation of the printing machine; The relationship between the printing speed and the chopper phase for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed, and the step of acquiring the printing speed in the printing machine is shown. A step of creating relational data, and executing a chopper phase management method.

  According to a third aspect of the present invention, there is provided a chopper phase management device that manages a chopper phase indicating a timing at which a sheet is folded by a chopper blade of a folding portion provided in a printing press, and obtains a chopper phase during operation of the printing press. A printing speed acquisition unit for acquiring a printing speed in the printing machine, a printing speed for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed, and It is a program for functioning as a relational expression data creating unit that creates relational expression data indicating the relationship between chopper phases.

  According to a fourth aspect of the present invention, there is provided a chopper phase management device that manages a chopper phase indicating a timing at which a sheet is folded by a chopper blade of a folding portion provided in a printing press, and obtains a chopper phase during operation of the printing press. A printing speed acquisition unit for acquiring a printing speed in the printing machine, a printing speed for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed, and It is a storage medium storing a program for functioning as a relational expression data creation unit that creates relational expression data indicating the relationship of chopper phases.

  ADVANTAGE OF THE INVENTION According to this invention, the chopper phase management apparatus etc. which can manage a chopper phase and can assist a chopper folding work suitably can be provided.

The figure which shows the chopper phase management apparatus 1 and the offset rotary press 3 The figure which shows the outline of the folding part 7 The figure which shows the hardware constitutions of the chopper phase management apparatus 1 The figure which shows the function structure of the chopper phase management apparatus 1 Diagram showing the flow of speed tracking curve creation processing The figure which shows the example of the speed tracking curve 200 Diagram showing the flow of chopper phase control Diagram explaining the appropriate range of chopper phase The figure which shows the outline of the chopper folding part 10

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1. Chopper phase management device 1)
First, a chopper phase management device 1 according to an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a diagram showing a chopper phase management device 1 and an offset rotary press 3 that is a printing machine to which the chopper phase management device 1 is applied.

  The offset rotary press 3 includes a paper feeding unit (not shown) that unwinds and supplies the roll-shaped paper 30 for printing, a printing unit 4 that performs printing on the paper 30, and a drying unit that dries the printed paper 30. 5. From the cooling unit 6 that cools the paper 30 after drying, the folding unit 7 that cuts the cooled paper 30 and folds it to a predetermined size, the paper discharge unit 8 that transports the folded paper 30 to a predetermined position, etc. Composed.

  Here, the printing unit 4 includes units 4a that perform printing of each color such as C (cyan), M (magenta), Y (yellow), and K (black). In each unit 4a, printing on the sheet 30 is performed by a plate cylinder 41 having an image line portion and a non-image line portion corresponding to the print pattern of each color. During printing by the plate cylinder 41, ink supplied from an ink supply device (not shown) is transferred to the image line portion of the plate cylinder 41 by various rollers. When the plate cylinder 41 rotates while being in contact with the paper 30 being conveyed, the ink in the image line portion of the plate cylinder 41 is transferred to the paper 30 and printing is performed.

  FIG. 2 is a diagram schematically illustrating an example of the folded portion 7. Here, the folding part 7 includes an upstream folding part 9 and a chopper folding part 10.

  The sheet 30 sent from the cooling unit 6 is conveyed to the upstream folding unit 9 of the folding unit 7. In the upstream folding unit 9, the paper 30 is first folded along the paper conveyance direction by the triangular plate 91. The paper 30 is cut by a saw cylinder 92 in the paper width direction perpendicular to the paper conveyance direction. The cut sheet 30 is folded in the sheet width direction between the folding cylinder 93 and the rod cylinder 94. The sheet 30 folded in this way is fed between the upper and lower conveyor belts 96 by the transfer cylinder 95. The paper 30 is sent to the chopper folding unit 10 by the transport belt 96. In addition, the structure of such an upstream folding part 9 is an example of a known thing, and is not restricted to this.

  In the chopper folding unit 10, the paper 30 is fed onto the chopper table 102 by the transport belt 96. The configuration and operation of the chopper folding unit 10 are as already described with reference to FIG.

  As described above, the speed at which the paper 30 is conveyed in the chopper folding unit 10 changes according to the printing speed in the printing unit 4, and the printing speed, for example, the number of rotations per unit time of the plate cylinder 41 of the printing unit 4, The appropriate chopper phase (see distance D in FIG. 9) corresponds.

  As described with reference to FIG. 9 and the like, when the chopper blade 101 contacts the paper 30 with an appropriate chopper phase, the paper 30 is appropriately chopper folded by the chopper blade 101, but when the chopper phase deviates from an appropriate value, There is a risk that chopper folding may not be performed properly. When the chopper phase is advanced from the appropriate value, the paper 30 is chopper-folded in front of the stopper 103. On the other hand, when the chopper phase is delayed from the appropriate value, the paper 30 hits the stopper 103 and is chopper-folded when it bounces back. In either case, the paper 30 may be misaligned or may be damaged such as tearing or deformation.

(2. Chopper phase management device 1)
Next, the hardware configuration of the chopper phase management device 1 will be described with reference to FIG. As shown in FIG. 3, the chopper phase management device 1 can be realized by a computer in which a control unit 11, a storage unit 12, an input unit 13, a display unit 14, a communication unit 15, and the like are connected via a bus 16. However, the configuration of the chopper phase management device 1 is not limited to this.

  The control unit 11 includes a CPU, a ROM, a RAM, and the like. The CPU calls and executes a program stored in the storage unit 12, ROM, storage medium, etc. to a work memory area on the RAM, drives and controls each unit connected via the bus 16, and the chopper phase management device 1 The process to be described later is realized. The ROM is a non-volatile memory and permanently stores programs, data, and the like. The RAM is a volatile memory, and temporarily holds a program, data, and the like loaded from the storage unit 12, ROM, storage medium, and the like, and includes a work area used by the control unit 11 for performing various processes.

  The storage unit 12 is a hard disk drive or the like, and stores a program executed by the control unit 11, data necessary for program execution, and the like. The program and the like are read by the CPU of the control unit 11 as necessary, transferred to the RAM, and executed as various means.

The input unit 13 is for performing an operation instruction, an operation instruction, data input, or the like to the chopper phase management apparatus 1 and includes input devices such as a touch panel and keys.
The display unit 14 includes a display device such as a liquid crystal panel, and a logic circuit for realizing a display function in cooperation with the display device.
The communication unit 15 is a communication interface that mediates communication via a network or the like.
The bus 16 is a path that mediates transmission / reception of control signals, data signals, and the like between the units.

  Next, the functional configuration of the chopper phase management device 1 will be described with reference to FIG. As shown in FIG. 4, the chopper phase management device 1 includes a chopper phase acquisition unit 111, a printing speed acquisition unit 112, a relational expression data creation unit 113, a preset unit 114, a warning unit 115, and the like.

  The chopper phase acquisition unit 111 acquires the drive signal of the chopper blade 101 from the drive mechanism of the chopper blade 101, and also acquires and compares the rotation signal from the folding cylinder 93 of the upstream folding unit 9, and calculates the chopper phase. is there.

  That is, since the operation of the entire folding unit 7 is synchronized, the rotation phase indicated by the rotation signal of the folding cylinder 93 corresponds to the distance between the paper 30 conveyed on the chopper table 102 and the stopper 103. Further, the timing at which the chopper blade 101 descends and reaches the height position of the slit 105 is known from the drive signal of the chopper blade 101, for example, a drive signal indicating when the chopper blade 101 starts to descend. Therefore, the chopper phase can be calculated by comparing these.

  For example, the printing speed acquisition unit 112 acquires a rotation signal from the plate cylinder 41 of the printing unit 4 and calculates a printing speed from the rotation signal such as the number of rotations of the plate cylinder 41 per unit time.

  The relational expression data creation unit 113 is relational expression data indicating the relationship between the printing speed and the chopper phase using the chopper phase acquired by the chopper phase acquisition unit 111 and the printing speed acquired by the printing speed acquisition unit 112. The speed follow-up curve 200 is created. This speed following curve 200 is used for controlling the chopper phase according to the printing speed in the offset rotary press 3.

  The preset unit 114 inputs (presets) the speed following curve 200 to the offset rotary press 3 when the offset rotary press 3 is in operation. The offset rotary press 3 sets an appropriate chopper phase as a target for the printing speed based on the speed following curve 200.

  The warning unit 115 issues a warning to the operator when the chopper phase deviates from an appropriate range determined from the printing speed and the speed following curve 200 during operation of the offset rotary press 3.

  The chopper phase management device 1 is connected to the database 2. The database 2 stores a speed tracking curve 200, printing condition data 201, and the like.

  The speed following curve 200 is relational data indicating the relationship between the printing speed and the chopper phase as described above, and indicates an appropriate value of the chopper phase according to the printing speed of the offset rotary press 3.

  The printing condition data 201 is data indicating printing conditions such as the type of paper 30 and the folding method when the printed matter is produced by the offset rotary press 3.

(3. Creation of speed following curve 200)
Next, a flow of creating a speed following curve in the present embodiment will be described with reference to FIG. FIG. 5 is a diagram showing a flow of the speed following curve creation process, and S1 to S7 in FIG. 5 are processes performed by the control unit 11 of the chopper phase management device 1.

  In the present embodiment, when the web offset press 3 is in operation, the chopper phase management device 1 acquires the printing condition data 201 indicating the printing conditions during production of the printed material from the database 2 (S1).

  Further, during operation of the offset rotary press 3, the chopper phase management device 1 acquires the rotation signal of the plate cylinder 41 of the printing unit 4, the rotation signal of the folding cylinder 93, and the drive signal of the chopper blade 101 (S3).

  Then, the chopper phase management device 1 compares the drive signal of the chopper blade 101 and the rotation signal of the folding cylinder 93, and calculates the chopper phase as described above. Further, the printing speed is calculated from the rotation signal of the plate cylinder 41 (S3).

  Then, while the printed material 30 folded at the folding part 7 is a non-defective product (S4; Y), the chopper phase is associated with the printing speed and stored in the database 2 or the like (S5). While the printed material is not good (S4; N), the process of S5 is not performed.

  Whether or not the printed material is a non-defective product can be determined by, for example, turning on / off a reject button for removing the printed material being conveyed by the paper discharge unit 8 when the printed material is defective. While the printed material is good, the reject button is in an off state.

  The chopper phase management device 1 repeats the processes of S2 to S5 until the operation of the offset rotary press 3 is finished (S6: N), and when the operation of the offset rotary press 3 is finished (S6: Y), the database in S5. The chopper phase and printing speed stored in 2 etc. are combined with the chopper phase and printing speed under the same printing conditions already stored by the same processing, and the speed follow-up curve 200 is created and updated using these (S7). The chopper phase management device 1 stores the created speed tracking curve 200 in the database 2 for each printing condition, and ends the process.

  FIG. 6 is a diagram showing an example of the speed following curve 200. As shown in FIG. FIG. 6 is a plot of data in which the printing speed and the chopper phase are associated with each other plotted with the printing speed as the horizontal axis and the chopper phase as the vertical axis. It is an example represented on a graph.

  In this embodiment, the speed tracking curve 200 is created for each printing condition such as the type of paper 30 and the folding method. Therefore, as will be described later, the speed following curve 200 under the same printing conditions can be used for every production of printed matter, and the accuracy of chopper folding can be increased.

  For example, a coated paper with a coating on the surface and a non-coated paper without a coating have different slipperiness during conveyance and different proper chopper phases. If it is prepared for each type of coated paper and non-coated paper, the management accuracy of the chopper phase is increased. Other types of paper 30 include weight per unit area of the paper 30 and thickness.

  Also, depending on the folding method of the sheet 30, for example, four-fold or eight-fold, the operation of the folding portion 7 and the slipperiness etc. also change as described above, so that the proper chopper phase is different. Therefore, by creating the speed following curve 200 for each folding method, the management accuracy of the chopper phase is increased.

(4. Chopper phase control)
Next, the flow of chopper phase control in this embodiment will be described with reference to FIG. FIG. 7 is a diagram showing a flow of control of the chopper phase, and S21 to S27 in FIG. 7 are processes performed by the control unit 11 of the chopper phase management device 1.

  When the offset rotary press 3 is in operation, the chopper phase management device 1 first acquires a speed tracking curve 200 corresponding to the printing conditions during production of the printed material from the database 2 (S21).

  Then, the chopper phase management device 1 presets the acquired data of the speed following curve 200 in the offset rotary press 3 (S22). The offset rotary press 3 uses the data of the speed following curve 200 to set an appropriate chopper phase according to the printing speed and perform printing.

  During the operation of the offset rotary press 3, the chopper phase management device 1 performs the same processing as that of S 2 and S 3 (see FIG. 5) to detect the rotation signal of the plate cylinder 41 and the rotation signal of the folding cylinder 93 and the chopper blade 101. A drive signal is acquired (S23), and a chopper phase and a printing speed are calculated (S24). These printing speed and chopper phase data are used for determination in S25 described later, and as described with reference to FIG. 5 and the like, while the printed material is a non-defective product, it is stored and accumulated in the database 2 to create the speed following curve 200. Used.

  In S25, the chopper phase management device 1 determines whether or not the chopper phase calculated in S24 is within an appropriate range determined by the speed tracking curve 200 from the printing speed calculated in S24 (S25).

  FIG. 8 is a diagram showing an appropriate range of the chopper phase. In the present embodiment, for example, as indicated by a dotted line in FIG. 8, the operator arbitrarily sets the appropriate range of the chopper phase such as 5% above and below the appropriate value determined by the speed following curve 200 from the printing speed. Can do. This may be set in advance, or may be set when the offset rotary press 3 is operated.

  If the chopper phase is within the appropriate range (S25: Y), the printing is continued as it is. However, if the chopper phase is outside the appropriate range (S25: N), the chopper phase management device 1 displays the display unit 14 or a separately provided warning. A warning to that effect is issued by a lamp, an alarm or the like (S26).

  Thus, the chopper phase management device 1 repeats the processes of S23 to S26 until the operation of the offset rotary press 3 is completed (S27: N), and ends the process together with the operation end of the offset rotary press 3 (S27: Y).

  As described above, according to the present embodiment, the chopper phase management device 1 collects the data of the printing speed and the chopper phase in the operating offset rotary press 3, and shows the relationship between the printing speed and the chopper phase. A tracking curve 200 is created. By using this for the management of the chopper phase according to the printing speed, it is possible to reduce the labor of adjusting the chopper phase. Furthermore, since the speed follow-up curve 200 can be created and updated using the latest operation data of the offset rotary press 3, even if the relationship between the printing speed and the chopper phase changes due to the secular change of the offset rotary press 3, etc. Can be obtained, and chopper phase management with high accuracy can be performed according to the current state of the offset rotary press 3. As described above, the yield and productivity of printed matter can be improved.

  Further, since the chopper phase management device 1 creates the speed tracking curve 200 for each printing condition, the speed tracking curve 200 having the same printing conditions as the printed matter to be produced can be used, and the chopper phase management with high accuracy according to the printing conditions can be performed. it can. In particular, the type of paper 30 and the folding method are factors that change the appropriate chopper phase as described above. Therefore, it is effective to create the speed following curve 200 for each type of paper 30 and the folding method as printing conditions. is there. In addition, as printing conditions, a printing pattern determined according to the item, an area ratio of the printing pattern with respect to the surface area of the plate cylinder 41, and the like are also conceivable.

  Further, in the present embodiment, the speed tracking curve 200 is created by using data while the folding process is properly performed and the printed material is regarded as a non-defective product. Therefore, the speed tracking curve 200 with higher reliability can be created. Thereby, the precision of chopper folding can be improved and the yield of the printed matter produced can be improved.

  Further, since the chopper phase management device 1 presets and inputs the speed tracking curve 200 corresponding to the printing conditions at the time of production of the printed material to the printing machine 3, it is possible to adjust the chopper phase without adjusting the chopper phase by the operator. Adjustments can be made from the beginning. Previously, the operator used to perform test printing by adjusting the chopper phase, which was time-consuming and caused productivity to drop. However, by performing presetting as described above, the time required for test printing, etc. was reduced. Productivity.

  Further, the chopper phase management device 1 warns when the chopper phase is out of the proper range, so that the operator can efficiently perform maintenance such as machine maintenance or adjustment of the printing speed and the chopper phase according to the warning. This can be done well, leading to improved machine availability and reduced yield.

  Factors that cause the chopper phase to be outside the proper range include a decrease in machine accuracy at the folding portion 7 and an abnormality in the offset rotary press 3. Also, when the operator himself adjusts the chopper phase to be out of the proper range, the above-mentioned abnormalities and abnormalities of the mechanical consumables such as the conveyor belt 96 are unavoidable. There is a risk that it has occurred. The chopper phase management device 1 warns that the chopper phase is out of the proper range due to these abnormalities, thereby triggering the operator to detect the abnormalities of the equipment, and the printing speed and chopper as the maintenance of the equipment or emergency measures. Phase adjustment can be performed efficiently, leading to improvement in machine availability and prevention of yield reduction.

  However, the present invention is not limited to that described in the present embodiment. For example, in the present embodiment, the chopper phase is calculated using the rotation signal of the folding cylinder 93. However, as another example of the present invention, the rotation signal is obtained from another rotation cylinder of the upstream folding unit 9 and calculated. Good. Alternatively, other methods may be used as long as the position of the paper 30 at the time of chopper folding can be obtained as the chopper phase. Similarly, the printing speed is not limited to the plate cylinder 41, and may be calculated from a rotation signal of another rotating cylinder, or may be another method as long as the printing speed can be obtained.

  Furthermore, in this embodiment, the speed tracking curve 200 is created from the data when the printed material is a non-defective product. However, in some cases, it is possible to create the speed tracking curve from the collected data regardless of whether it is good or bad. Has the advantage that a lot of data can be obtained. It is also possible to analyze the relationship between the chopper phase and the occurrence of defective products from the data collected at the time of occurrence of defective printed materials, and use it for setting the appropriate range.

  Further, in the present embodiment, the offset rotary press 3 is taken as an example of a printing press, but other printing presses can be applied as long as a folding portion that performs chopper folding is provided.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1: Chopper phase management device 2: Database 3: Offset rotary press 4: Printing unit 7: Folding unit 9: Upstream folding unit 10: Chopper folding unit 30: Paper 101: Chopper blade 111: Chopper phase acquisition unit 112: Print speed acquisition Unit 113: relational expression data creation unit 114: preset unit 115: warning unit 200: speed following curve 201: printing condition data

Claims (9)

A chopper phase management device for managing a chopper phase indicating a timing at which a sheet is folded by a chopper blade of a folding portion provided in a printing machine,
A chopper phase acquisition unit for acquiring a chopper phase during operation of the printing press;
A printing speed acquisition unit for acquiring a printing speed in the printing press;
A relational expression data creating unit that creates relational expression data indicating the relationship between the printing speed and the chopper phase for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed. ,
A chopper phase management device comprising:   The chopper phase management apparatus according to claim 1, wherein the relational expression data is created for each printing condition.   The chopper phase management apparatus according to claim 2, further comprising a preset unit that inputs the relational expression data corresponding to printing conditions in the printing press to the printing press.   The apparatus further comprises a warning unit that issues a warning when the chopper phase deviates from an appropriate range of the chopper phase determined from the printing speed and the relational expression data during operation of the printing press. Item 4. The chopper phase management device according to Item 3.   The relational expression data creation unit uses the chopper phase and the printing speed when the printed material after being folded by the chopper blade is a non-defective product to create the relational expression data. Item 5. The chopper phase management device according to Item 4.   The chopper phase management apparatus according to claim 2, wherein the printing condition includes at least one of a paper type and a paper folding method. A chopper phase management device that manages the chopper phase indicating the timing at which the paper is folded by the chopper blade of the folding part provided in the printing press,
Obtaining a chopper phase during operation of the printing press;
Obtaining a printing speed in the printing press;
Using the chopper phase and the printing speed to create relational expression data indicating the relationship between the printing speed and the chopper phase for controlling the chopper phase according to the printing speed of the printing press;
The chopper phase management method characterized by performing. A chopper phase management device that manages the chopper phase indicating the timing at which the paper is folded by the chopper blade of the folding part provided in the printing machine,
A chopper phase acquisition unit for acquiring a chopper phase during operation of the printing press;
A printing speed acquisition unit for acquiring a printing speed in the printing press;
A relational expression data creating unit that creates relational expression data indicating the relationship between the printing speed and the chopper phase for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed. ,
Program to make it function. A chopper phase management device that manages the chopper phase indicating the timing at which the paper is folded by the chopper blade of the folding part provided in the printing machine,
A chopper phase acquisition unit for acquiring a chopper phase during operation of the printing press;
A printing speed acquisition unit for acquiring a printing speed in the printing press;
A relational expression data creating unit that creates relational expression data indicating the relationship between the printing speed and the chopper phase for controlling the chopper phase according to the printing speed of the printing machine using the chopper phase and the printing speed. ,
A storage medium that stores a program for functioning.

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