JP4776339B2 - Printing machine and operation method of printing machine - Google Patents

Description

  The present invention relates to a printing press and a method for operating the printing press, and more particularly to a printing press for confirming the nip pressure of a plurality of rollers against a plate cylinder and a method for operating the printing press.

  A printing machine, for example, an offset printing machine, includes an ink supply unit that supplies ink to a plate cylinder that holds a printing plate, and a dampening water supply unit that supplies dampening water to the plate cylinder. The ink supply means supplies ink to the printing plate surface on the plate cylinder when a plurality of ink forming rollers abut on the plate cylinder. On the other hand, the fountain solution supply means supplies the fountain solution to the printing plate surface on the plate cylinder when the swim roller contacts the plate cylinder. The supply amounts of these ink and dampening water vary depending on the contact pressure of the ink form roller and the form roller with respect to the plate cylinder, that is, the nip pressure.

  Accordingly, the printing press includes nip pressure adjusting means for adjusting the nip pressure. The nip pressure is adjusted by the nip pressure adjusting means, and the supply amounts of ink and dampening water are adjusted. The adjustment of the nip pressure is performed before the daily operation of the printing press or during regular maintenance. At this time, it is necessary to check the nip pressure before and after the adjustment.

  In a conventional printing machine, roller marks of a plurality of rollers for supplying ink and fountain solution to the plate cylinder are formed on the plate cylinder manually or as shown in Patent Document 1, and this roller mark is formed by an operator. The nip pressure was confirmed by visual inspection.

JP 2003-182022 A

  However, when the roller marks are manually formed on the plate cylinder, the operator has to approach the vicinity of the plate cylinder and further rotate the plate cylinder to a position where the roller marks formed on the plate cylinder can be seen. Further, as shown in Patent Document 1, even when the roller marks are automatically formed on the plate cylinder, the operator approaches the vicinity of the plate cylinder and visually observes the roller marks formed on the plate cylinder rotated to a visible position. There is a need.

  Here, some offset printing machines include a plurality of printing units each including a plate cylinder, a plurality of rollers, and an impression cylinder for holding a printing target. In a printing press having such a plurality of printing units, the operator must approach the vicinity of the plate cylinder of the printing unit and visually check the roller marks formed on the plate cylinder for each printing unit. There is a problem that it takes time to check the nip pressure with respect to the plate cylinder of each of the plurality of rollers of the printing unit.

  The present invention has been made in view of the above, and provides a printing machine and a printing machine operating method capable of easily confirming the nip pressure with respect to the plate cylinder of each of the plurality of rollers of each printing unit. Objective.

  In order to solve the above-described problems and achieve the object, in the present invention, at least a plate cylinder for holding a printing plate, a plurality of rollers for supplying ink and fountain solution to the plate cylinder, and an impression cylinder for holding a printing target In each of the printing presses having a plurality of printing units, each of the plurality of printing units is in contact with the plurality of rollers on which an ink film is formed, and each of the plates is in contact with the plurality of rollers. The cylinder is stopped after a predetermined rotation, and the roller marks are formed on the plate cylinder by the roller mark forming means by forming roller marks by separating the plurality of rollers from the plate cylinders. Roller mark transfer means for transferring one sheet at a time to the printing object held by each of the impression cylinders.

  Also, in the present invention, a printing cylinder operating method comprising a plurality of printing units each having at least a printing cylinder for holding a printing plate, a plurality of rollers for supplying ink and dampening water to the printing drum, and an impression cylinder for holding a printing object. And a step of contacting each of the plurality of rollers having ink films formed on each plate cylinder of the plurality of printing units, and each plate cylinder rotating after a predetermined distance while the plurality of rollers are in contact with each other. A procedure, forming a roller mark by separating the plurality of rollers from the plate cylinders, and one roller mark formed on each plate cylinder on a printing object held on each impression cylinder And a transfer procedure.

  According to these inventions, the roller marks of the plurality of rollers are formed for each plate cylinder of each printing unit, and the roller marks of the plurality of rollers formed on each plate cylinder are printed on the impression cylinder. One by one is transferred to the target. That is, the roller marks of each of the plurality of rollers formed on one plate cylinder are transferred to one printing target. Therefore, the operator does not visually observe the roller marks formed on the plate cylinder for each printing unit, but the roller marks formed on the plate cylinder of each printing unit transferred for each printing object discharged from the printing press. By visually observing, the nip pressure with respect to the plate cylinder of each of the plurality of rollers of each printing unit can be easily confirmed.

  According to the present invention, in the printing machine, the roller mark transfer means includes a roller mark formed on each of the plate cylinders from the printing machine in the order in which the print target to which the roller marks are transferred passes through the plurality of printing units or in the reverse order. It is characterized by discharging.

  According to the present invention, the printing object to which the roller marks formed on the plate cylinder of each printing unit are transferred is discharged from the printing machine in the order in which the printing object passes through the plurality of printing units or in the reverse order. Therefore, for example, each printing unit is a printing unit using the same color ink, and even if all the roller marks transferred to each printing object are the same color, the printing cylinders of each printing unit discharged from the printing machine Since the order of the printing objects to which the formed roller marks are transferred is determined, when the operator visually observes the roller marks formed on the plate cylinder of each printing unit transferred to the printing object, which printing unit plate It can be easily understood whether the roller marks are formed on the cylinder.

  According to the present invention, in the printing machine, the roller mark forming unit simultaneously contacts the plurality of rollers with each plate cylinder.

  According to this invention, the roller marks of the plurality of rollers can be formed on the plate cylinder at a time only by rotating the plate cylinder in which the plurality of rollers are simultaneously in contact with each other. Therefore, it is possible to shorten the time until the operator visually confirms the roller marks transferred to each print target. Thereby, the operation start time or maintenance time of the printing press can be shortened.

  According to the present invention, in the printing machine, the roller mark forming unit separately contacts the plurality of rollers with each plate cylinder.

  According to this invention, the contact position of each roller with respect to each plate cylinder can be changed. Accordingly, the interval between the roller marks formed on each plate cylinder can be made shorter than when a plurality of rollers are in contact with each plate cylinder simultaneously. Therefore, regardless of the size of the printing object to which the roller marks of the plate cylinder held by the impression cylinder are transferred, the roller marks formed on each printing cylinder can be transferred reliably to the printing object.

  According to the printing press and the operation method of the printing press according to the present invention, the plate of each of the plurality of rollers of each printing unit is obtained by visually observing each print target on which the roller trace is transferred from the roller trace formed on each plate cylinder. There is an effect that the nip pressure on the cylinder can be easily confirmed.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. In the following embodiments, an offset printing machine will be described. However, the printing machine according to the present invention is not limited to an offset printing machine, and at least a plate cylinder for holding a printing plate, ink and dampening on the plate cylinder. Any printing machine may be used as long as it is equipped with a plurality of printing units having a plurality of rollers for supplying water and an impression cylinder for holding a printing target.

  FIG. 1 is a diagram illustrating a schematic configuration example of an offset printing machine. FIG. 2 is a diagram illustrating a configuration example of each printing unit. As shown in FIG. 1, the offset printing machine 1 includes a roller mark forming unit and a roller mark transfer unit. The offset printing machine 1 includes a plurality of printing units, in this embodiment, four printing units 10, 20, 30, 40, a paper feeding device 50, a paper discharging device 60, and each printing unit 10-40. The intermediate cylinders 71, 72, and 73 disposed in the control unit 80, and a control device 80 that controls the operation of the offset printing machine 1. Reference numeral 90 denotes an input / output device such as an operation panel for inputting an instruction by the operator when operating the printing press or displaying the operating state of the printing press to the operator.

  As shown in FIG. 2, the printing units 10 to 40 include ink supply devices 11, 21, 31, 41, dampening water supply devices 12, 22, 32, 42, and plate cylinders 13, 23, 33, 43. Blanket cylinders 14, 24, 34, 44, impression cylinders 15, 25, 35, 45, cylinder rotating devices 16, 26, 36, 46 as cylinder rotating means, and cylinder attaching / detaching means 17 as cylinder attaching / detaching means. , 27, 37, 47. In this embodiment, each of the printing units 10 to 40 uses a different color ink. For example, the printing unit 10 uses black ink in the first printing unit, and the printing unit 20 uses second printing. The unit uses indigo ink, the printing unit 30 uses red ink in the third printing unit, and the printing unit 40 uses yellow ink in the fourth printing unit.

  The ink supply devices 11 to 41 are ink supply means and constitute a part of the roller mark forming means. The ink supply devices 11 to 41 supply the black, indigo, red, and yellow monochromatic inks to the plate cylinders 13 to 43, respectively. The ink supply means 11 to 41 are attached to an ink fountain device (not shown) that stores the inks of the respective colors, an ink fountain roller (not shown) that is immersed in ink stored in the ink fountain device, and the ink fountain roller. An ink roller group (not shown) that conveys ink to the ink form roller, and ink form rollers 11a to 11d, 21a to 21d, 31a to 31d, and 41a to 41d in which ink films are formed by the respective colors of ink conveyed by the ink roller group And ink side roller rotating devices 11e, 21e, 31e, 41e and ink side roller attaching / detaching devices 11f, 21f, 31f, 41f.

  The ink-side roller rotating devices 11e to 41e receive a driving force from a driving source such as a motor (not shown) from an ink source roller, an ink roller group, and ink form rollers 11a to 11d and 21a to 21d (not shown) of the ink supply devices 11 to 41, respectively. , 31a to 31d, 41a to 41d, and these are rotated synchronously (including driven rotation). That is, the ink supply devices 11 to 41 rotate the ink source rollers, the ink roller group, and the ink form rollers 11a to 11d, 21a to 21d, 31a to 31d, and 41a to 41d by the ink side roller rotating devices 11e to 41e. By doing so, ink films are formed on the ink form rollers 11a to 11d, 21a to 21d, 31a to 31d, and 41a to 41d that rotate in the direction of arrow A with the ink stored in the ink fountain device. The ink-side roller rotating devices 11e to 41e are subjected to ink-side roller synchronous rotation control by the control device 80.

  The ink side roller attaching / detaching devices 11f to 41f include, for example, solenoids (not shown), and the ink forming rollers 11a to 11d, 21a to 21d, 31a to 31d, and 41a to 41d are in contact with the plate cylinders 13 to 43, respectively. Alternatively, they are separated. In other words, the ink supply devices 11 to 41 have ink form rollers 11a to 11d, 21a to 21d, 31a to 31d on which ink films spaced from the plate cylinders 13 to 43 are formed by the ink side roller attaching / detaching devices 11f to 41f, respectively. 41a to 41d (dotted line in FIG. 2) are brought into contact with the plate cylinders 13 to 43 so that the inks of the respective colors adhere to the plate cylinders 13 to 43 and are supplied (solid lines in the figure). ). The ink side roller attaching / detaching devices 11f to 41f are configured such that the ink side roller attaching / detaching control is performed by the control device 80.

  The dampening water supply devices 12 to 42 are dampening water supply means and constitute a part of the roller mark forming means. The dampening water supply devices 12 to 42 supply dampening water to the plate cylinders 13 to 43. The dampening water supply devices 12 to 42 each include a dampening water tank device (not shown) that stores dampening water, a water source roller (not shown) that is immersed in dampening water stored in the dampening water tank device, and this water. A water roller group (not shown) that transports dampening water adhering to the original roller to the water roller, and water roller 12a, 22a, 32a, 42a in which a water film is formed by dampening water conveyed by the water roller group; The fountain solution roller rotating devices 12b, 22b, 32b, and 42b, and the fountain solution roller attaching / detaching devices 12c, 22c, 32c, and 42c are configured. That is, each of the printing units 10 to 40 includes a plurality of rollers (ink forming rollers 11a to 11d, 21a to 21d, 31a to 31d, 41a to 41d, and a swimsuit) that supply ink and dampening water to the plate cylinders 13 to 43, respectively. Each of the rollers 12a to 42a) is provided.

  The dampening water side roller rotating devices 12b to 42b respectively use a driving force from a driving source such as a motor (not shown) and a water source roller, a water roller group, and a swim roller 12a to 42a. And rotate them (including driven rotation). In other words, the fountain solution supply devices 12 to 42 rotate the fountain roller, the water roller group, and the swimsuit rollers 12a to 42a (not shown) by the fountain solution side roller rotation devices 12b to 42b. The water film is formed on the swim rollers 12a to 42a that rotate in the direction of arrow A in FIG. The dampening water side roller rotating devices 12b to 42b are controlled by the control device 80 so that dampening water side roller synchronous rotation control is performed.

  The dampening water side roller attaching / detaching devices 12c to 42c have, for example, a solenoid (not shown) and the like, and make the dampening rollers 12a to 42a contact or separate from the plate cylinders 13 to 43, respectively. In other words, the fountain solution supply devices 12 to 42 make the dampening water side roller attaching / detaching devices 12c to 42c abut the swim roller 12a to 42a on which the water film is formed to the plate cylinders 13 to 43, respectively. The dampening water adheres to each of the plate cylinders 13 to 43 and is supplied. Here, between the ink supply devices 11 to 41 and the dampening water supply devices 12 to 42, transfer mechanisms 18, 28, 38, and 48 are arranged, respectively. The transfer mechanisms 18 to 48 are disposed between, for example, an unillustrated ink roller group or ink form rollers 11a to 11d, 21a to 21d, 31a to 31d, 41a to 41d, and the swim rollers 12a to 42a. It is comprised by the delivery roller which each contact | abuts. Accordingly, the transfer mechanisms 18 to 48 attach and supply the inks of the respective colors supplied to the plate cylinders 13 to 43 by the ink supply devices 11 to 41 to the swim rollers 12a to 42a. That is, an ink film can be formed on the swim rollers 12a to 42a. In addition, the dampening water side roller attaching / detaching devices 12c to 42c are controlled by the control device 80 to perform dampening water side roller attaching / detaching control.

  The plate cylinders 13 to 43 hold a printing plate on which information to be printed on the paper P to be printed is formed. The plate cylinders 13 to 43 are provided with printing plate holding devices (not shown) in the recesses 13a, 23a, 33a, and 43a, respectively. The printing plate holding device holds the printing plate on the plate cylinder. The ink and the fountain solution respectively supplied to the plate cylinders 13 to 43 by the ink supply devices 11 to 41 and the fountain solution supply devices 12 to 42 are supplied to the printing plate surface on the plate cylinder. An ink film is formed on each plate cylinder 13 to 43 along the unevenness of the printing plate surface.

  In the blanket cylinders 14 to 44, the ink film along the unevenness of the printing plate surface formed on each of the plate cylinders 13 to 43 is transferred. The blanket cylinders 14 to 44 are provided with bracket holding devices (not shown) for holding blankets formed of rubber or the like (not shown) on the blanket cylinders. The blanket cylinders 14 to 44 are arranged so as to be in contact with and separated from the plate cylinders 13 to 43 and the impression cylinders 15 to 45, respectively.

  As shown in FIGS. 1 and 2, the impression cylinders 15 to 45 hold a printing object, which is paper P in this embodiment. Each of the impression cylinders 15 to 45 is provided with a printing target holding device (not shown) that holds the paper P on the impression cylinder.

  The cylinder rotating devices 16 to 46 constitute a part of the roller mark transfer means. The cylinder rotating devices 16 to 46 transmit the driving force from a driving source such as a motor (not shown) to the plate cylinders 13 to 43, the blanket cylinders 14 to 44, and the impression cylinders 15 to 45, respectively. It rotates in synchronization with the direction. The cylinder rotation devices 16 to 46 also rotate the intermediate cylinders 71 to 73 in synchronization with the impression cylinders 15 to 45. In addition, the cylinder rotation devices 16 to 46 are subjected to cylinder synchronous rotation control by the control device 80.

  The cylinder attaching / detaching devices 17 to 47 constitute a part of the roller mark transfer means. The cylinder attaching / detaching devices 17 to 47 include, for example, a solenoid and a cam mechanism (not shown), and bring the blanket cylinders 14 to 44 into contact with or separate from the plate cylinders 13 to 43 and the impression cylinders 15 to 45, respectively. It is. In other words, the blanket cylinders 14 to 44 are brought into contact with the plate cylinders 13 to 43 by the cylinder attaching / detaching devices 17 to 47, respectively. Thus (solid line in the figure), the ink film along the unevenness of the printing plate surfaces of the plate cylinders 13 to 43 is transferred. Further, the blanket cylinders 14 to 44 are brought into contact with the impression cylinders 15 to 45 by the cylinder attaching / detaching devices 17 to 47, respectively, with the blanket cylinders 14 to 44 (two-dot chain lines in FIG. 2) separated from the impression cylinders 15 to 45 (see FIG. As a result, the ink film along the unevenness of the printing plate surface transferred to the blanket cylinders 14 to 44 is transferred to the paper P held by the impression cylinders 15 to 45. As a result, printing plate information is printed for each color on the paper P to be printed. Note that the cylinder attaching / detaching devices 17 to 47 are subjected to cylinder attaching / detaching control by the control device 80.

  As shown in FIG. 1, the paper feeding device 50 and the paper discharge device 60 are arranged at both ends of the printing units 10 to 40, respectively. The paper supply device 50 supplies paper P to be printed to the printing machine 1. On the other hand, the paper discharge device 60 discharges the paper P that is a printing target that has passed through the printing units 10 to 40 from the printing machine 1. Here, the intermediate cylinders 71 to 73 are arranged between the impression cylinders 15 to 45, and the intermediate cylinders 71 to 73 also hold the paper P on the intermediate cylinder, and are not shown. Is provided. Accordingly, the paper P supplied from the paper feeder 50 to the printing press 1 includes the impression cylinder 15 and the intermediate cylinder 71 of the printing unit 10, the impression cylinder 25 and the intermediate cylinder 72 of the printing unit 20, and the impression cylinder 35 of the printing unit 30. Paper in which the intermediate cylinder 73 and the impression cylinder 45 of the printing unit 40 are held in this order, conveyed from the impression cylinder 45 to the paper discharge device 60, and information on each printing plate is printed for each color in each printing unit 10-40. P is discharged from the printing press 1 by the paper discharge device 60. The paper feeding device 50 and the paper ejection device 60 are driven and controlled by the control device 80.

  The control device 80 controls the operation of the printing press 1 and includes a processing unit and a storage unit (not shown). A processing unit (not shown) includes an ink-side roller synchronous rotation control unit that performs the ink-side roller synchronous rotation control, an ink-side roller attachment / detachment control unit that performs ink-side roller attachment / detachment control, and a fountain solution that performs dampening water-side roller synchronous rotation control. Side roller synchronous rotation control unit, dampening water side roller attachment / detachment control unit that performs dampening water side roller attachment / detachment control, plate cylinder synchronization rotation control unit that performs plate cylinder synchronous rotation control, and cylinder attachment / detachment control unit that performs cylinder attachment / detachment control Then, various control signals are output to each device. The storage unit stores a program for determining the control content of each device, for example, a nip pressure confirmation program.

  Next, an operation method of the printing press 1, particularly a method for confirming the nip pressure with respect to the plate cylinders 13 to 43 of a plurality of rollers will be described. FIG. 3 is a diagram illustrating a flow of the operation method of the printing press according to this embodiment. 4 to 10 are diagrams for explaining the operation of each printing unit. FIG. 11 is a diagram showing the paper on which the roller marks are transferred.

  First, when checking the nip pressure of each of the plurality of rollers with respect to the plate cylinders 13 to 43, the operator controls a command for switching the operation state of the printing press 1 to the nip pressure checking mode from the input / output device 90 shown in FIG. Input to device 80. As a result, a nip pressure confirmation program stored in a storage unit (not shown) of the control device 80 is executed by the processing unit.

  Next, as shown in FIG. 3, the roller mark forming means applies an ink film to any one of the printing units 10 to 40, in this embodiment, a plurality of rollers of the first printing unit 10 in this embodiment. Form (step ST1). Here, as shown in FIG. 4, the control device 80 rotates the ink base roller, the ink roller group, and the ink form rollers 11a to 11d (not shown) in the direction of arrow A by the ink side roller rotating device 11e. Therefore, ink stored in an ink fountain device (not shown) is supplied to the ink form rollers 11a to 11d, and a single color (black color) ink film is formed. At this time, the transfer mechanism 18 supplies the ink conveyed by the ink roller group also to the water application roller 12a, and a monochromatic (black) ink film is also formed on the water application roller 12a. As a result, as shown in the figure, ink films (thick lines in the figure) are formed on the ink form rollers 11a to 11d and the water application roller 12a, which are a plurality of rollers. In addition, the control device 80 separates the ink form rollers 11 a to 11 d and the water application roller 12 a from the plate cylinder 13 before forming the ink film on the plurality of rollers of the first printing unit 10. And whether the blanket cylinder 14 is separated from the plate cylinder 13 and the impression cylinder 15, and if not, the ink side roller attaching / detaching device 11f and the dampening water side roller attaching / detaching device 12c. The blanket cylinder 14 is separated by a plurality of rollers by the cylinder attaching / detaching device 17.

  Next, the roller mark forming unit cues the plate cylinder 13 of the first printing unit 10 (step ST2). Here, the control device 80 rotates the plate cylinder 13 by the cylinder rotating device 16 to cue the plate cylinder 13. This is because when the ink side roller attaching / detaching device 11f and the fountain solution roller attaching / detaching device 12c are in contact with the plate cylinder 10 when any of the ink forming rollers 11a to 11d and the water applying roller 12a are in contact with the plate cylinder 10, This is because it is located in the recess 13a of the plate cylinder 13 and prevents the roller marks from being formed on the plate cylinder 13.

  Next, the roller mark forming means simultaneously brings a plurality of rollers into contact with the plate cylinder 13 of the first printing unit 10 (step ST3). Here, as shown in FIG. 5, the control device 80 uses the ink side roller attaching / detaching device 11f and the fountain solution side roller attaching / detaching device 12c to replace the plurality of ink form rollers 11a to 11d and the swim roller 12a with the plate cylinder. 13 simultaneously. Accordingly, the ink films formed on the plurality of ink forming rollers 11a to 11d and the water applying roller 12a simultaneously adhere to the plate cylinder 13, respectively.

  Next, the roller mark forming means rotates the plate cylinder 13 of the first printing unit 10 by a predetermined rotation (step ST4). Here, as shown in the figure, the controller 80 causes the drum rotating device 16 to rotate the plate cylinder 13 in the arrow B direction in the figure. For example, the controller 80 causes the cylinder rotating device 16 to rotate the plate cylinder 13 by 20 mm as a predetermined rotation on the plate cylinder. The predetermined rotation is not limited to 20 mm on the plate cylinder, and may be less than 20 mm on the plate cylinder or more than 20 mm on the plate cylinder. That is, the predetermined rotation may be a rotation within a range in which the ink adhering to the plate cylinder 13 from at least adjacent rollers among the plurality of rollers does not overlap.

  Next, the roller mark forming means stops the rotation of the plate cylinder 13 of the first printing unit 10 (step ST5). Here, as shown in FIG. 6, the control device 80 causes the drum rotating device 16 to stop the rotating plate cylinder 13 after a predetermined rotation. The roller mark forming means stops the rotation of the plate cylinder 13 of the first printing unit 10 in order to confirm the true nip pressure on the roller marks corresponding to the plurality of rollers on the plate cylinder 13. This is for forming a nip width to be used.

  Next, the roller mark forming means separates the plurality of rollers from the plate cylinder 13 of the first printing unit 10 (step ST6). Here, as shown in FIG. 7, the control device 80 uses the ink side roller attaching / detaching device 11 f and the fountain solution side roller attaching / detaching device 12 c to replace the plurality of ink forming rollers 11 a to 11 d and the water applying roller 12 a with the plate cylinder 13. Separated from. As a result, roller marks N11a, N11b, N11c, N11d, and N12a corresponding to the plurality of ink form rollers 11a to 11d and the water form roller 12a are formed on the plate cylinder 13, respectively. The roller mark forming means separates the plurality of rollers from the plate cylinder 13 of the first printing unit 10 because an impact load is applied to the plate cylinder 13 when the plurality of rollers remain in contact with the plate cylinder 13. This is because the true nip width formed on the roller marks corresponding to each of the plurality of rollers cannot be formed and it is difficult to confirm the true nip pressure.

  Next, the roller mark forming means determines whether or not the roller mark formation on the plate cylinders 13 to 43 of all the printing units 10 to 40 included in the printing machine 1 has been completed (step ST7). Here, the control device 80 determines whether or not the roller mark formation on the plate cylinders 13 to 43 of all the printing units 10 to 40 has been completed. When the controller 80 determines that the roller mark formation on the plate cylinders 13 to 43 of all the printing units 10 to 40 has not been completed, the control unit 80 applies the printing cylinders 13 to 43 of all the printing units 10 to 40 to the plate cylinders 13 to 43. Steps ST1 to ST6 are executed for each of the printing units 10 to 40 until the roller mark formation is completed.

  Next, when it is determined that the roller mark forming unit has completed the formation of the roller marks on the plate cylinders 13 to 43 of all the printing units 10 to 40 included in the printing machine 1 by the roller mark forming unit, the printing machine 1 The paper P to be printed on is started to be fed (step ST8). Here, the control device 80 sequentially supplies the paper P to the printing machine 1 by the paper feeding device 50.

  Next, the roller mark transfer means performs the cylinder insertion of the fourth printing unit 40 (step ST9, step ST10). Here, the control device 80 sets n to the number of printing units provided in the printing press 1 (n = 4) (step ST9), and as shown in FIG. 8, the n-th, that is, the fourth printing unit 40 is used. Then, the blanket cylinder 44 is brought into contact with the plate cylinder 43 and the impression cylinder 45 (step ST10). At this time, the control device 80 rotates the plate cylinder 43, the blanket cylinder 44, and the impression cylinder 45 in the direction of arrow B in the figure by the cylinder rotating device 46. Therefore, as shown in FIG. 9, the roller marks N41a, N41b, N41c, N41d, and N42a formed on the plate cylinder 43 are transferred to a blanket (not shown) of the blanket cylinder 44 that abuts on the plate cylinder 43. As shown in FIG. 10, the roller marks N41a to N42a formed on the plate cylinder 43 transferred to the blanket cylinder 44 are fed from the sheet feeding device 50 held by the impression cylinder 45 in contact with the blanket cylinder 44. It is transferred to the first paper P4 fed to the printing press 1 (see FIG. 11). The control device 80 can transfer the roller marks N41a to N42a transferred to the blanket cylinder 44 to the paper P4 before the paper P4 held on the impression cylinder 45 comes into contact with the blanket cylinder 44 and leaves. The blanket cylinder 44 is brought into contact with the plate cylinder 43 and the impression cylinder 45 by the cylinder attaching / detaching device 47.

  Next, the roller mark transfer means performs the cylinder removal of the fourth printing unit 40 (step ST11). Here, as shown in the figure, the control device 80 causes the cylinder attaching / detaching device 47 to separate the blanket cylinder 44 from the plate cylinder 43 and the impression cylinder 45.

  Next, the roller mark transfer means is a paper P1 on which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 of all the printing units 10 to 40 are to be printed. It is determined whether or not it has been transferred to .about.4. Here, control device 80 determines whether n = 1 or not (step ST12).

  Next, the roller mark transfer means is a paper P1 on which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 of all the printing units 10 to 40 are to be printed. Are determined to be transferred to the printing unit 10 on the sheet feeding device side, that is, the order in which the papers P1 to P4 pass through the plurality of printing units 10 to 40. In reverse order, the roller marks N31a to N32a, N21a to N22a, and N11a to N12a formed on the plate cylinders 33, 23, and 13 of the printing units 30, 20, and 10 are transferred to the paper P3 to 1 to be printed (step). ST13, step ST10 to step ST11). Here, the controller 80 sets n = n−1 (step ST13), transfers the roller marks N31a to N32a formed on the plate cylinder 33 of the third printing unit 30 to the paper P3, and then the second The roller marks N21a to N22a formed on the plate cylinder 23 of the printing unit 20 are transferred to the paper P2, and finally the roller marks N11a to N12a formed on the plate cylinder 13 of the first printing unit 10 are transferred to the paper P1. . Then, the operation of the offset printing machine 1 is stopped (step ST14).

  As a result, the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a respectively formed on the plate cylinders 13 to 43 are transferred to the papers P1 to P4, which are printing targets, as shown in FIG. Then, the papers P <b> 1 to P <b> 4 are discharged from the printing machine 1 and moved to the discharge device 60. The operator visually observes the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a transferred to the papers P1 to P4. By visually observing the width of the roller trace portion T formed when the rotation of 43 stops, that is, the nip width, the nip pressure with respect to each plate cylinder 13 to 43 of each of the plurality of rollers is confirmed. The operator adjusts the nip pressure with respect to each plate cylinder 13 to 43 of each of the plurality of rollers in accordance with the confirmed nip pressure with respect to each plate cylinder 13 to 43 of each of the plurality of rollers.

  As described above, the roller mark forming means forms the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a for each of the plurality of rollers for each of the plate cylinders 13 to 43 of the printing units 10 to 40, The roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a of the plurality of rollers formed on the plate cylinders 13 to 43 are paper P1 to be printed that are held by the impression cylinders 15 to 45, respectively. One sheet is transferred to each P4. That is, the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a of the plurality of rollers formed on one plate cylinder 13 to 43 are transferred to one sheet P1 to P4. Become. Accordingly, the operator does not need to visually check the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 for each printing unit, and the paper discharged from the printing press 1. By visually observing the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 of the printing units 10 to 40 transferred for each of P1 to P4, each printing unit The nip pressure with respect to the plate cylinders 13 to 43 of each of the plurality of 10 to 40 rollers can be easily confirmed.

  Further, the nip pressures of the printing units 10 to 40 with respect to the plate cylinders 13 to 43 of the respective rollers are transferred onto the papers P1 to P4 by the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a, respectively. So it can be saved easily. Further, by storing the paper P1 to P4 on which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a are transferred every time the nip pressure is confirmed, the change with time of the printing press 1 can be easily confirmed. be able to.

  Further, the papers P1 to P4 that are the printing targets to which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 are respectively transferred are the papers P4 to P1. The printers 1 are discharged from the printing machine 1 in the reverse order of passing through the printing units 10 to 40. Accordingly, the paper discharge device 60 overlaps in the order of P1, P2, P3, and P4 from the top surface to the bottom. For example, each printing unit 10-40 is a printing unit using the same color ink, and roller marks N11a-N12a, N21a-N22a, N31a-N32a, N41a- Even if N42a is the same color, the discharge order of the papers P1 to P4 onto which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a discharged from the printing press 1 are respectively determined is determined. Therefore, when the operator visually observes the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a transferred to the papers P1 to P4, these are the roller marks formed on the plate cylinder of which printing unit. Can be easily understood.

  The control device 80 may set n = 1 in step ST9, determine whether n = 4 in step ST12, and set n = n + 1 in step ST13. As a result, the roller mark transfer means transfers the paper P1 to P4, which is the printing target, onto which the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43 are transferred. It is possible to discharge from the printing machine 1 in the order of passing through the printing units 10 to 40.

  In the above-described embodiment, the roller mark forming unit causes each of the plurality of rollers to contact the plate cylinders 13 to 43 simultaneously, but may separately contact each of the plate cylinders 13 to 43. In this case, the contact position of each roller with respect to each plate cylinder 13 to 43 can be changed. Therefore, for example, the roller mark forming means causes the plurality of rollers to contact the plate cylinders 13 to 43 in order in the rotation direction of the plate cylinders 13 to 43, respectively. At this time, the roller mark forming means contacts the plate cylinders 13 to 43 with the roller marks formed on the plate cylinders 13 to 43 after a plurality of rollers are brought into contact with the plate cylinders 13 to 43 respectively. Next, the plate cylinders 13 to 43 are rotated from the contact position of the rollers contacting the plate cylinders 13 to 43 to the rotational direction side of the plate cylinders 13 to 43. Thus, the distance between the roller marks N11a to N12a, N21a to N22a, N31a to N32a, and N41a to N42a formed on the plate cylinders 13 to 43, rather than the case where a plurality of rollers are in contact with the plate cylinders 13 to 43 simultaneously. Can be shortened. Accordingly, regardless of the size of the papers P1 to P4 that are the printing objects held by the pressure cylinders 15 to 45, the roller marks N11a that are reliably formed on the plate cylinders 13 to 43 on the papers P1 to P4, respectively. -N12a, N21a-N22a, N31a-N32a, N41a-N42a can be transferred.

  As described above, the printing press and the operating method of the printing press according to the present invention are useful for the printing press provided with a plurality of printing units and the operating method of the printing press, and in particular, the plates of each of the plurality of rollers of each printing unit. Suitable for easily confirming the nip pressure against the cylinder.

It is a figure which shows the schematic structural example of an offset printing machine. It is a figure which shows the structural example of each printing unit. It is a figure which shows the flow of the operating method of the printing press concerning this Example. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is operation | movement explanatory drawing of each printing unit. It is a figure which shows the paper on which the roller trace was transcribe | transferred.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Offset printer 10, 20, 30, 40 Printing unit 11, 21, 31, 41 Ink supply apparatus (ink supply means)
11a to 11d, 21a to 21d, 31a to 31d, 41a to 41d Inking roller (multiple rollers)
11e, 21e, 31e, 41e Ink side roller rotating device 11f, 21f, 31f, 41f Ink side roller attaching / detaching device 12, 22, 32, 42 Dampening water supply device (dampening water supply means)
12a, 22a, 32a, 42a Swim roller (multiple rollers)
12b, 22b, 32b, 42b Dampening water side roller rotating device 12c, 22c, 32c, 42c Dampening water side roller attaching / detaching device 13, 23, 33, 43 Plate cylinder 14, 24, 34, 44 Blanket cylinder 15, 25, 35, 45 Pressure cylinder 16, 26, 36, 46 Cylinder rotation device 17, 27, 37, 47 Cylinder attachment / detachment device 18, 28, 38, 48 Delivery mechanism 50 Paper feed device 60 Paper delivery device 71, 72, 73 Intermediate cylinder 80 Control device 90 I / O devices N11a to N11d, N21a to N21d, N31a to N31d, N41a to N41d, N12a to N42a Roller trace P, P1 to P4 Paper (printing target)

Claims (5)

In a printing machine comprising at least a printing cylinder for holding a printing plate, a plurality of rollers for supplying ink and dampening water to the printing drum, and a plurality of printing units having an impression cylinder for holding a printing object,
The plurality of rollers on which the ink film is formed are brought into contact with the plate cylinders of the plurality of printing units, and the plate cylinders are stopped after a predetermined rotation in a state where the plurality of rollers are in contact with the plurality of rollers. Roller mark forming means for forming roller marks by separating the rollers from the plate cylinders;
Roller mark transfer means for transferring the roller marks formed on the plate cylinders from the roller mark forming means one by one to a printing object held on the impression cylinders;
A printing machine comprising: The roller mark transfer means is
The printing machine according to claim 1, wherein a printing object to which a roller mark formed on each plate cylinder is transferred is discharged from the printing machine in an order of passing through the plurality of printing units or in an opposite order.   The printing press according to claim 1, wherein the roller mark forming unit simultaneously contacts the plurality of rollers with each plate cylinder.   3. The printing press according to claim 1, wherein the roller mark forming unit abuts the plurality of rollers separately on each plate cylinder. 4. In an operating method of a printing press comprising at least a printing cylinder for holding a printing plate, a plurality of rollers for supplying ink and fountain solution to the printing drum, and a plurality of printing units having an impression cylinder for holding a printing object,
A procedure of abutting the plurality of rollers each having an ink film formed on each plate cylinder of the plurality of printing units;
A procedure of stopping the plate cylinders after rotating a predetermined distance with the plurality of rollers in contact with each other;
A procedure for forming roller marks by separating the plurality of rollers from the plate cylinders;
A procedure for transferring the roller marks formed on each plate cylinder one by one to a printing object held on each impression cylinder;
A method for operating a printing press, comprising:

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