JP2018062098A - Printing machine and piling removal method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing machine and the like which can efficiently reduce stain of a blanket cylinder while suppressing reduction in the efficiency of printing.SOLUTION: A printing machine includes: a blanket cylinder which is brought into rolling contact with a conveyed web; a plate cylinder which is brought into rolling contact with the blanket cylinder and to which a printing plate is attached; a conveyance device which conveys the web; a switching device which switches between the state where the blanket cylinder nips the web and the state where the blanket cylinder contacts the web without nipping; and a control device which controls the conveyance device and the switching device. The control device, when a portion that does not become the product of the web passes through the blanket cylinder, turns the state into the state where the blanket cylinder contacts the web without nipping by the switching device, and executes piling removal processing of making the speed of the surface of the blanket cylinder different from the speed of the web.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a printing press such as a rotary offset printing press that performs printing using a printing plate and a method for removing a pile.

  An offset rotary printing press for newspapers includes a paper feeding device, a printing device, a web pass device, and a folder. The printing apparatus includes a plurality of printing units, and each printing unit performs printing on a corresponding web. The printing unit transfers the image of the blanket cylinder to the web while the image of the plate cylinder is transferred to the blanket cylinder and the web is nipped by the blanket cylinder.

  In the printing press, if foreign matter adheres to the surface of the blanket cylinder, the printed matter is adversely affected. Among the deposits, in order to prevent the adhesion of the pile, Patent Document 1 discloses that the transfer position of the printing pattern from the plate cylinder to the blanket cylinder is displaced at every rotation speed equal to or less than a predetermined rotation speed of the plate cylinder. A blanket piling prevention method for performing a displacement operation including a rotational direction component of the cylinder is described. In addition, there is a printing machine provided with a blanket cylinder cleaning device that cleans the blanket cylinder in order to prevent the adverse effects of adhering substances (see, for example, Patent Document 2). The apparatus described in Patent Document 2 describes that the web transport speed is lowered during paper splicing and the blanket cylinder is cleaned with a cleaning device.

JP 2009-262507 A JP-A-8-20104

  In Patent Document 2, foreign matter attached to the blanket cylinder can be removed by cleaning the blanket cylinder with a cleaning device at the time of paper joining. However, since the web speed is lowered, there is a problem that the printing efficiency is lowered. In addition, if the cleaning using a cleaning device that performs cleaning by attaching a brush or cloth to the blanket cylinder is performed while the blanket cylinder is rotating at a high speed, the blanket cylinder is consumed.

  Accordingly, an object of the present invention is to provide a printing machine and a piling removal method capable of efficiently reducing the stain on the blanket cylinder while suppressing a decrease in printing efficiency.

  A printing machine according to the present invention includes a blanket cylinder that is in rolling contact with a web to be conveyed, a plate cylinder that is in rolling contact with the blanket cylinder and has a printing plate mounted thereon, a conveying device that conveys the web, and the blanket cylinder is the web. A switching device that switches between a state in which the web is nipped and a state in which the web is in contact without being nipped, and a control device that controls the transport device and the switching device, wherein the control device includes the web When the portion that does not become a product passes through the blanket cylinder, the switching device is in contact with the web without being nipped, and the speed of the surface of the blanket cylinder and the speed of the web are different from each other. The piling removal process is executed.

  Accordingly, the printing press can perform the removal of the pile using the web when a portion of the web that is not a product passes through the blanket cylinder. As described above, the removal and reduction of the piling can be performed using the web on which no printed matter is generated, so that the stain on the blanket cylinder, specifically, the piling can be efficiently reduced while suppressing the decrease in the printing efficiency.

  The conveying device preferably has an adjusting device for adjusting the tension of the web. Thereby, a pile can be reduced more reliably.

  Moreover, it is preferable that the part which does not become a product of the said web contains the paper splicing part on which the said 2 sheets of said web were laminated | stacked. Thereby, during printing, it is possible to remove the pile while suppressing an increase in waste paper.

  Further, it is preferable that the apparatus further includes a cleaning liquid supply device that supplies a cleaning liquid to the blanket cylinder, and the control device supplies the cleaning liquid at the time of execution of the piling removal process. Thereby, it is possible to make it easier to remove the pile.

  Further, in the width direction of the web, it has a width direction position adjustment device that relatively changes the position of the web with respect to the blanket cylinder, and the control device performs the pile removal process with respect to the blanket cylinder. It is preferable to change the position of the web. Thereby, a pile can be removed more efficiently.

  Further, it is preferable that the apparatus further includes a blanket cylinder cleaning device that cleans the blanket cylinder, and the control device performs the cleaning process by the blanket cylinder cleaning apparatus during the execution of the peeling removal process. Thereby, the foreign material adhering to the blanket cylinder can be further removed.

  Further, it is preferable that the apparatus further includes a blanket cylinder cleaning device that cleans the blanket cylinder, and the control device does not execute the cleaning process by the blanket cylinder cleaning device during the execution of the piling removal process. Thereby, a pile can be removed, suppressing consumption of a blanket cylinder.

  In addition, the control device changes the speed of the surface of the blanket cylinder when a portion of the web that does not become a product passes through the blanket cylinder so that the speed of the surface of the blanket cylinder is lower than the speed of the web. It is preferable that Thereby, it is possible to remove the pile while simplifying the control of the printing press.

  Moreover, it is preferable that the said control apparatus makes the phase of the said blanket cylinder with respect to the said web before a pile removal process, and the phase of the said blanket cylinder with respect to the said web after a pile removal process the same phase. As a result, it is possible to perform the piling removal process while reducing the influence on the upstream and downstream controls of the blanket cylinder. As a control downstream of the blanket cylinder, there is a step of cutting the printed matter.

  The method for removing a pile according to the present invention includes a blanket cylinder that is in rolling contact with a web to be conveyed, a plate cylinder that is in rolling contact with the blanket cylinder and mounted with a printing plate, a conveyance device that conveys the web, and the blanket cylinder is A piling removal method for a printing press comprising a switching device for switching between a state in which a web is nipped and a state in which the web is in contact without being nipped, wherein a portion of the web that does not become a product is connected to the blanket cylinder. When passing, the switching device is in contact with the web without being nipped, and the speed of the surface of the blanket cylinder is different from the speed of the web.

  Accordingly, when a portion of the web that does not become a product passes through the blanket cylinder, the removal of the pile can be performed using the web. As described above, the removal and reduction of the piling can be performed using the web on which no printed matter is generated, so that the stain on the blanket cylinder, specifically, the piling can be efficiently reduced while suppressing the decrease in the printing efficiency.

  According to the present invention, it is possible to efficiently reduce dirt on the blanket cylinder, specifically, piling, while suppressing a decrease in printing efficiency.

FIG. 1 is a schematic configuration diagram illustrating a newspaper offset rotary printing press according to the present embodiment. FIG. 2 is a schematic configuration diagram illustrating a printing unit according to the present embodiment. FIG. 3 is a schematic configuration diagram showing a main part of the printing unit of the present embodiment. FIG. 4 is a flowchart illustrating an example of the peeling removal process of the printing unit according to the present embodiment. FIG. 5 is a timing chart showing an example of the peeling removal process of the printing unit according to the present embodiment. FIG. 6 is an explanatory diagram for explaining the peeling removal process of the printing unit according to the present embodiment. FIG. 7 is an explanatory diagram for explaining the piling removal process of the printing unit according to the present embodiment. FIG. 8 is a timing chart showing another example of the peeling removal process of the printing unit according to the present embodiment. FIG. 9 is a timing chart showing another example of the peeling removal process of the printing unit according to the present embodiment. FIG. 10 is a schematic configuration diagram illustrating a printing unit according to another embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the constituent elements described below can be appropriately combined, and when there are a plurality of embodiments, the embodiments can be combined.

[Embodiment 1]
FIG. 1 is a schematic configuration diagram illustrating a newspaper offset rotary printing press according to the present embodiment. FIG. 2 is a schematic configuration diagram illustrating a printing unit according to the present embodiment. FIG. 3 is a schematic configuration diagram showing a main part of the printing unit of the present embodiment.

  As shown in FIG. 1, the printing press according to the present embodiment is a newspaper offset rotary printing press, and includes a paper feeding device R having a plurality of (in this embodiment, eight) paper feeding units R1 to R8, A printing apparatus U having a plurality (6 in this embodiment) of printing units U1 to U6, a web path apparatus D having a plurality (2 in this embodiment) of web path units D1 and D2, and a plurality ( In the present embodiment, a folding machine F having two folding units F1 and F2 and a control device 51 are provided.

  Although the printing units U1 to U6 are described as six units, each of the printing units U1 to U6 can perform four-color printing and can be divided into upper and lower units and can perform twelve two-color printing units U11, U12, U21... U61, U62 can be used.

  In FIG. 1, two folding units F1 and F2 are shown side by side, but actually, an operation side folding unit F1 and a driving side folding unit F2 arranged side by side in a direction perpendicular to the paper surface. It has become. Furthermore, although the printing apparatus U has been described from two parts, it has been described by dividing it into two in terms of function, and in reality, it is a single apparatus.

  In the web offset press for newspaper according to the present embodiment, the paper feeding units R1 to R8 are installed on the first floor of a building (not shown), and the printing units U1 to U6 are installed on the second and third floors. A web pass device D is installed on the floor, and a folding machine F is installed on the second and third floors.

  Here, the above-described paper feeding device R, printing device U, web pass device D, and folding machine F will be described in detail.

  In the paper feeding device R, the paper feeding units R1 to R8 have substantially the same configuration, and are provided with a holding arm 11 that holds three webs on which the web W is wound in a roll shape. By doing so, the web can be rotated to the paper feed position. Each of the paper feeding units R1 to R8 is provided with a paper splicing device (not shown), and when the remaining web fed out at the paper feeding position becomes small, the paper splicing device causes the paper web at the paper feeding position to be fed. Thus, the web at the standby position can be spliced.

  In the printing apparatus U, as shown in FIGS. 1 and 2, the printing units U <b> 1 to U <b> 6 are multicolor printing units that can perform double-sided four-color printing. However, each printing unit U1-U6 can be made into the printing units U11-U62 which can perform double-sided two-color printing by dividing | segmenting up and down. Although details will be described later, each of the printing units U <b> 1 to U <b> 6 includes a pair of blanket cylinders 13 that are in contact with both front and back surfaces of the web W, and a plate cylinder 12 that is in contact with the pair of blanket cylinders 13. The circumference of the plate cylinder 12 is set to the vertical length of one page of the newspaper (printed material), and the circumference of the blanket cylinder 13 is set to an integral multiple of the circumference of the plate cylinder 12. The circumference (diameter) of the plate cylinder 12 and the circumference (diameter) of the blanket cylinder 13 may be set to be the same. Then, on the peripheral surface of the plate cylinder 12, one printing plate (not shown) in the circumferential direction and four printing plates in the axial direction are detachably mounted.

  In the present embodiment, the printing units U1 to U6 are all configured by multi-color printing units, but are not limited to this configuration. For example, various units such as a double-sided two-color printing unit, a double-sided single-color printing unit, a single-sided four-color printing unit or a single-color printing unit may be used in combination as appropriate according to the printed matter.

  In the web pass device (conveying device) D, the web pass unit D1 is provided for the printing units U1 to U3, and the web pass unit D2 is provided for the printing units U4 to U6. Each of the web path units D1 and D2 has substantially the same configuration, and is a slitter that cuts the web W along the longitudinal direction (the longitudinal direction of the web W, the conveyance direction of the web W) at the center in the width direction, and the longitudinal cut. A turn bar for setting the transport path of the web W, and a compensator for adjusting the transport position of the web W in the vertical direction.

  Accordingly, the webs W printed by the printing units U1 to U3 are vertically cut by the slitter in the web pass unit D1, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. Are overlapped in this order to form a plurality of webs W1. Each of the webs W printed by the printing units U4 to U6 is vertically cut by a slitter in the web pass unit D2, is changed by a turn bar, a transfer path is changed, and a transfer position is adjusted by a compensator. By overlapping in order, a plurality of webs W2 are obtained.

  In the folding machine F, the two folding units F1 and F2 are arranged on the operation side and the drive side. Therefore, when a plurality of webs W1 are overlapped and introduced from the web pass unit D1, the folding unit F1 vertically folds the web W1, cuts it horizontally by a predetermined length, and folds it to form a fold. The paper can be discharged as a newspaper. In addition, when a plurality of webs W2 are overlapped and introduced from the web pass unit D2, the folding unit F2 vertically folds the web W2, cuts the web W2 by a predetermined length, and then horizontally folds to form a fold. The paper can be discharged as a newspaper. In this case, in the folding machine F, the folding units F1 and F2 not only process the webs W1 and W2 from the web path units D1 and D2, but also one of the folding units F1 and F2 can process them together. .

  Here, the printing unit U1 in the printing apparatus U will be described in detail. Since the other printing units U2 to U6 have substantially the same configuration, description of the other printing units U2 to U6 is omitted.

  As shown in FIG. 2, the printing unit U1 is an H-type tower unit capable of four-color printing. In the printing units U1 to U6, four stacks a, b, c, and d for black, cyan, magenta, and yellow are arranged vertically. Each stack a, b, c, d has a pair of left and right plate cylinders 12a, 12b, 12c, 12d, and a pair of left and right plate cylinders 12a, 12b, 12c, 12d. It has blanket cylinders 13a, 13b, 13c, and 13d. Each of the stacks a, b, c, and d is provided with a pair of ink fountains 15a, 15b, 15c, and 15d on the left and right in accordance with the number of the pair of plate cylinders 12a, 12b, 12c, and 12d. The ink supply path from each ink fountain 15a, 15b, 15c, 15d to each plate cylinder 12a, 12b, 12c, 12d is constituted by a plurality of ink rollers (not shown). In the printing unit U1, blanket cylinder cleaning devices 22a, 22b, 22c, and 22d are arranged in each of the four stacks a, b, c, and d.

  In this case, the stacks a and c have plate cylinders 12a and 12c and blanket cylinders 13a and 13c arranged in a square shape, and the stacks b and d have plate cylinders 12b and 12d and blanket cylinders 13b and 13d inverted. It is arranged in a letter shape.

  Next, the stack c arranged second from the upper side will be described in detail with reference to FIG. The other stacks a, b, and d have almost the same configuration as the stack c.

  As shown in FIG. 3, the stack c is a surface printing unit that performs surface printing of the web W on the left side with respect to the conveyance path of the web W that is conveyed upward along the vertical direction, and the web W on the right side. It is the back surface printing unit which performs back surface printing.

  The stack c includes the above-described pair of blanket cylinders 13c, the above-described pair of plate cylinders 12c, the ink supply device 61, the dampening device 71, the width register correcting device 21, and the blanket cylinder cleaning device 22c. doing.

  The ink supply device 61 includes the above-described pair of ink fountains 15c and a plurality of ink rollers (not shown) provided in the ink supply path from the pair of ink fountains 15c to the pair of plate cylinders 12c. . In the ink supply device 61, the ink forming roller 14c comes into contact with the plate cylinder 12c, and supplies ink from the ink forming roller 14c to the plate cylinder 12c.

  The dampening device 71 is a spray system, and includes a pair of left and right water lidar rollers 81, a pair of left and right water reciprocating rollers 82, a pair of left and right swimsuit rollers 83, and a pair of left and right spray nozzles 84.

  The water rider roller 81 kneads fountain solution delivered between the rollers, has a surface formed of rubber, and is rotatably supported by the frame so as to contact the adjacent rollers. The water reciprocating roller 82 spreads the fountain solution passed between adjacent rollers in the width direction. The surface is formed of metal and is rotatably supported by the frame so as to contact the adjacent rollers. At the same time, it can reciprocate in the axial direction. The swimsuit roller 83 receives and supplies the fountain solution spread in the width direction by the water reciprocating roller 82, and the surface thereof is formed of rubber so as to be rotatable on the frame so as to contact the water reciprocating roller 82. It is supported. A plurality of spray nozzles 84 are arranged along the width direction with respect to the water reciprocating roller 82. At this time, the dampening water can be supplied only to a predetermined region in the axial direction of the water reciprocating roller 82 by operating any one of the plurality of spray nozzles 84.

  Further, the dampening device 71 is provided with a swimsuit roller moving mechanism 85 that moves the swimsuit roller 83 along the outer periphery of the water reciprocating roller 82. The swimsuit roller moving mechanism 85 is used at the time of maintenance, and moves from an upper position where it is in rolling contact with the plate cylinder 12c and the water reciprocating roller 82 to a lower position where it is not in contact with the plate cylinder 12c and the water reciprocating roller 82. The swimsuit roller 83 is moved along the outer periphery of the water reciprocating roller 82.

  The plate cylinder 12c is a metal roller around which the printing plate is wound. After the dampening water from the swimsuit roller 83 is transferred to the non-image area of the printing plate, the ink supplied from the ink supply device 61 is printed. Delivered to the drawing section of the plate. The plate cylinder 12c is rotatably supported by the frame so as to make rolling contact with the swimsuit roller 83. The blanket cylinder 13c is a rubber roller on which a blanket (rubber) (not shown) is wound on the surface, and transfers ink transferred from the plate cylinder 12c to the web W. The blanket cylinder 13c is attached to the frame so as to come into contact with the plate cylinder 12c. It is supported rotatably. Here, the left and right blanket cylinders 13c are arranged to be shifted in the vertical direction by a predetermined height. That is, the left and right blanket cylinders 13c are arranged at a position rotated by a predetermined angle θ with respect to the horizontal line, so that the left blanket cylinder 13c is positioned above the right blanket cylinder 13c by a predetermined height. . The plate cylinder 12c and the blanket cylinder 13c are coupled so as to be synchronously driven by a gear (not shown) and can be driven and rotated by a driving device. The blanket cylinder is switched between a wearing state (a state where the web W is nipped) and a detached state (a state where the web W is not nipped) by a switching device. The blanket cylinder may be in a detached state and in contact with the web W.

  In this case, the printing plate mounted on the plate cylinder 12c is formed with an area with a pattern (image area) and an area without an image (non-image area), and the image area is oleophilic and non-image area. The part is hydrophilic. Therefore, when the ink is supplied from the ink supply device 61 after the fountain solution is supplied from the swimsuit roller 83 to the printing plate mounted on the plate cylinder 12c, the ink is transferred only to the image line portion, The dampening water is transferred to the non-image area. When the blanket cylinder 13c comes into contact with the plate cylinder 12c and rotates synchronously, the ink in the image line portion is transferred from the plate cylinder 12c to the blanket cylinder 13c.

  In such a stack c, when ink is supplied from the ink fountain 15c of the ink supply device 61, the supplied ink passes through the ink supply path and is attached to the plate cylinder 12c via the ink application roller 14c. It is handed over to the printed line drawing section. On the other hand, when the spray nozzle 84 sprays dampening water onto the water reciprocating roller 82, the water rider roller 81 uses the dampening water applied to the water reciprocating roller 82 via the swimsuit roller 83 to the plate cylinder 12c of the plate cylinder 12c. To the non-image area of the printing plate mounted on the As the plate cylinder 12c rotates, the ink in the image line portion of the printing plate is transferred to the blanket cylinder 13c.

  Thereafter, when the web W passes through the nip portion between the blanket cylinders 13c, the ink (picture) transferred to each blanket cylinder 13c by the printing pressure is transferred to the front and back of the web W. That is, the ink of the left blanket cylinder 13c is transferred to the front surface of the web W, and the ink of the right blanket cylinder 13c is transferred to the back surface of the web W. Done.

  As shown in FIGS. 2 and 3, the width register correcting device 21 is provided between the stack b and the stack c. The width register correcting device 21 adjusts the register in the width direction of the web W based on the web data and the print data. That is, when the web W to be conveyed is printed by the stacks a and b of the printing unit U1, the web W is stretched in the width direction because the web W contains ink, moisture, and the like. In this state, when printing is performed on the web W by the stacks c and d of the printing unit U1, a printing shift occurs on the web W. For this reason, the misregistration (fan-out) is corrected by restoring the web W stretched in the width direction by the width register correcting device 21 to the width of the web W before printing. Here, the web data refers to the width of the web W (web size), the traveling speed of the web W, the tension of the web W, and the like, and the print data refers to the image line rate. In this case, the running speed and tension of the web W may be measured online using a sensor.

  The blanket cylinder cleaning device 22c is arranged for each of the blanket cylinders 13c. The blanket cylinder cleaning device 22c is arranged such that at least one of the brush and the cloth is detachable from the blanket cylinder 13c. The blanket cylinder cleaning device 22c removes foreign matter adhering to the surface of the blanket cylinder 13c by bringing a brush or cloth into contact with the blanket cylinder 13c. The blanket cylinder cleaning device 22c may include a cleaning liquid supply device that supplies a cleaning liquid to the blanket cylinder 13c. As the cleaning liquid, water or a liquid mixed with a chemical that can easily remove the deposit from the blanket cylinder can be used.

  The control device 51 controls the operation of each part of the newspaper offset rotary printing press and executes printing on the web W. In addition, the control device 51 controls the operation of each part of the newspaper offset rotary printing press, and executes a process of removing foreign matter adhering to the blanket cylinder 13.

  Next, referring to FIG. 4 to FIG. 9, the pile removal operation by the control device 51 will be described. FIG. 4 is a flowchart illustrating an example of the peeling removal process of the printing unit according to the present embodiment. FIG. 5 is a timing chart showing an example of the peeling removal process of the printing unit according to the present embodiment. FIG. 6 and FIG. 7 are explanatory diagrams for explaining the peeling removal processing of the printing unit of the present embodiment, respectively.

  When the control device 51 receives the paster signal, the control device 51 controls the operation of each part to execute a process of removing the pile attached to the blanket cylinder 13 (a pile removal process). That is, the control device 51 executes the pile removal process in parallel with the process of replacing the web that supplies the web W from the paper feeding device R. As shown in FIG. 5, the web W that passes through the printing unit that is executing the paster process and the piling removal process is conveyed at a constant speed.

  When the control device 51 receives the pasta signal (step S12), the control device 51 executes a pile removal process. In the processing shown in FIG. 5, it is detected that the pasta signal is received at time t1 when the pasta signal is turned on from OFF. When the control device 51 receives a paster signal, the control device 51 starts a process of replacing the web of the paper feeding device R. As a result, the overlapped portion of the two webs W generated when the web is replaced temporarily passes through the target printing unit.

  When receiving the pasta signal, the control device 51 increases the supply amount of water and causes the ink forming roller 14 to be detached (step S14). In the process shown in FIG. 5, the amount of dampening water supplied at time t2 is increased from the amount V1 to V2, and the ink forming roller 14 is detached at time t3. The increase in the amount of dampening water and the timing of separation of the ink application roller 14 may be reversed or simultaneous. By separating the ink application roller 14, new ink is not supplied to the blanket cylinder 13. In addition, by increasing the supply amount of the dampening water, the pile is easily separated from the blanket cylinder 13.

  When the supply amount of water is increased and the ink forming roller 14 is removed, the control device 51 starts the barrel removal process and stops the supply of water (step S16). In the process shown in FIG. 5, the cylinder detachment process is started at time t4. The blanket cylinder 13 is in a state of being in contact with the web W, although the web W is not nipped after a predetermined time has elapsed by starting the separation process. Specifically, when the blanket cylinders 13a, 13b, 13c, and 13d are in the wearing state, the web W is sandwiched between the blanket cylinders 13a, 13b, 13c, and 13d at the nip point 27 as shown in FIG. The nip is in contact with it. On the other hand, when the blanket cylinders 13a, 13b, 13c, and 13d are in the detached state (disengaged state), the blanket cylinders 13a, 13b, 13c, and 13d respectively contact the web W with the contact 18 as shown in FIG. Is in contact, but no nip. At time t4, the control device 51 sets the blanket cylinders 13a, 13b, 13c, and 13d in contact with the web W at the contact point 28 but not in the nip state. Further, the printing press becomes a waste paper because appropriate printing is not performed on the web W from the time when the blanket cylinders 13a, 13b, 13c, and 13d are in the detached state at time t4. Further, the control device 51 stops supplying the dampening water at time t4, that is, reduces the dampening water amount from the amount V2 to 0, and causes the swimsuit roller 83 to leave the blanket cylinder 13. In the printing machine according to the present embodiment, the blanket cylinder 13 facing the blanket cylinder 13 and the blanket cylinder 13 and the plate cylinder 12 are removed by the separation process of the blanket cylinder 13. Therefore, when the blanket cylinder 13 is removed, the fountain solution is not supplied to the blanket cylinder 13. Further, by continuing to supply the dampening water, excess water accumulates in the plate cylinder. Therefore, when the blanket cylinder 13 is removed, the supply of dampening water is stopped and the swimsuit roller 83 is removed.

  In the case of a printing machine in which the blanket cylinder 13 and the plate cylinder 12 are in the worn state even after the blanket cylinder 13 is removed, the dampening water is supplied from the plate cylinder 12 to the blanket cylinder 13 even during the peeling removal process. May be supplied. In this case, the printing press does not stop the supply of the dampening water and the detachment process of the swimsuit roller 83 while the blanket cylinder 13 is in the detached state.

  The control device 51 decelerates the rotational speed of the blanket cylinder 13 after starting the cylinder removal process (step S18). In the process shown in FIG. 5, the rotational speed of the blanket cylinder 13 is reduced from time t4 to time t5. After the time t5 has elapsed, the blanket cylinder 13 is rotated at a constant speed that is slower than before the time t4.

  The control device 51 determines whether to start the return process after decelerating the rotational speed of the trunk (step S20). The control device 51 determines whether to execute the return process based on detection results of various sensors or whether a preset time has elapsed. When it is determined that the return process is not started (No in Step S20), the control device 51 returns to Step S20. When it is determined that the return process is started (Yes in step S20), the control device 51 starts the return process, that is, the process of returning to the printing state.

  When the returning process is started, the control device 51 increases the rotational speed of the blanket cylinder 13 (step S22). In the process shown in FIG. 5, the rotational speed of the blanket cylinder 13 is increased from time t6 to time t7. Let After the time t7 has elapsed, the blanket cylinder 13 is rotated at the same constant speed as before the time t4.

  After increasing the rotational speed of the blanket cylinder 13, the control device 51 restarts the supply of water and puts the swimsuit roller 83 and the ink deposition roller 14 into a wearing state (step S 24). In the process shown in FIG. 5, the amount of dampening water supplied at time t6 is increased from 0 to the amount V1, and the swimsuit roller 83 and the ink deposition roller 14 are brought into the wearing state. The increase in the amount of dampening water and the timing of the separation of the swim roller 83 and the ink roller 14 may be different.

  The control device 51 restarts the supply amount of water, sets the swimsuit roller 83 and the ink deposition roller 14 in the wearing state, and then puts the blanket cylinder 13 in the wearing state (step S26). In the process shown in FIG. 5, the blanket cylinder 13 is put on at time t7. In the printing press, the web W that has passed through the printing unit after a time t8 when a predetermined time has elapsed after the blanket cylinder 13 is in the worn state becomes a correctly printed paper.

  As described above, the control device 51 is in contact with the blanket cylinder 13 in a state where it is not niped with the web W, and the speed of the web W and the blanket cylinder 13 is different, specifically, the position at which the blanket cylinder 13 contacts. By setting the web W and the blanket cylinder 13 to have different speeds, the pile attached to the blanket cylinder 13 can be removed by the web W. Moreover, the control apparatus 51 can perform the removal of a pile during the paster process by performing the pile removal process. Here, it is preferable that the control device 51 performs control so that the waste paper generated by replacing the web from time t4 to time t8 in FIG. 5 coincides with the timing at which the paper passes through the printing unit. As a result, it is possible to execute the peeling removal process on the spoiled paper generated by the paster process, that is, the spliced part where the two webs W, which are parts that do not become the product of the web W, are laminated. Peeling can be removed while suppressing. Moreover, since the pile removal process can be performed in parallel with the paster being executed, and the conveyance speed of the web W is constant, it is possible to suppress a decrease in printing efficiency by executing the pile removal process.

  Moreover, the printing press of this embodiment can reduce the paring adhering to the blanket cylinders 13a, 13b, 13c, and 13d by executing the piling removal process during the pasta process, and the blanket cylinder cleaning devices 22a, 22b, The period until the cleaning of the blanket cylinders 13a, 13b, 13c, 13d is required by 22c, 22d can be lengthened. Thereby, the printing efficiency can be increased. In particular, as in the present embodiment, when the web W is a newspaper and the printed matter is a newspaper, the web W is likely to adhere to the pile, which is effective. In the present embodiment, the blanket cylinder cleaning devices 22a, 22b, 22c, and 22d are provided, but the blanket cylinder cleaning devices 22a, 22b, 22c, and 22d may not be provided.

  Further, the printing press can make it easier to remove the piles attached to the blanket cylinders 13a, 13b, 13c, and 13d by increasing the amount of dampening water during the pile removal process. Further, by supplying water to the blanket cylinders 13a, 13b, 13c, and 13d, it is possible to suppress the web W from being cut as compared to when the web W is wetted with water. In particular, when the web W is newspaper as in the present embodiment, the paper is relatively easy to cut, which is effective. Moreover, in the said embodiment, although water was supplied from the dampening apparatus 71, it should just be able to supply water to the blanket cylinder 13c. For example, when the printing press is provided with a device for supplying water to the blanket cylinder cleaning device 22c, the printing press may supply water from the blanket cylinder cleaning device 22c. In this case, since the water is directly supplied from the blanket cylinder cleaning device 22c to the blanket cylinder 13c, the dampening water can be continuously supplied during the piling removal process. Therefore, it is possible to make it easier to remove the pile attached to the blanket cylinder 13c.

  In addition, the printing press may perform the cleaning of the blanket cylinder by the blanket cylinder cleaning devices 22a, 22b, 22c, and 22d during the peeling removal process. As a result, foreign matters other than the piled adhering to the blanket cylinders 13a, 13b, 13c, and 13d can be more reliably removed. In addition, it is preferable that the printing machine does not perform the cleaning of the blanket cylinders 13a, 13b, 13c, and 13d by the blanket cylinder cleaning devices 22a, 22b, 22c, and 22d during the peeling removal process. For example, when the web removal passing process is executed while the web W passing through the printing unit is decelerating or speeding up, the conveyance speed of the web W is lower than the normal operation speed. The blanket cylinders 13a, 13b, 13c, and 13d may be cleaned by the cylinder cleaning devices 22a, 22b, 22c, and 22d. On the other hand, when the web W passing through the printing unit is conveyed at a constant speed (equivalent to a normal operation speed), the blanket wears out due to contact with the blanket cylinder cleaning devices 22a, 22b, 22c, and 22d. Sometimes, it is preferable not to perform the cleaning of the blanket cylinders 13a, 13b, 13c, 13d with the blanket cylinder cleaning devices 22a, 22b, 22c, 22d. Thereby, consumption of the blanket cylinders 13a, 13b, 13c, and 13d can be suppressed.

  The printing machine preferably includes an adjusting device (tension controller) for adjusting the tension of the web W. Thereby, it can suppress more reliably that the web W fractures | ruptures at the time of execution of a piling removal process.

  When the printing machine performs the pile removal process, the blanket cylinders 13a, 13b, 13c, and 13d nip the web W from the state where the blanket cylinders 13a, 13b, 13c, and 13d nip the web W. It is preferable to change the position of the web W with respect to the blanket cylinders 13a, 13b, 13c, and 13d before switching to the contact state. The moving amount of the web W is, for example, 0.1 mm. By changing the position of the web W with respect to the blanket cylinders 13a, 13b, 13c, and 13d in the width direction of the web W, it is possible to remove the piles more efficiently. The timing of changing the position of the web W with respect to the blanket cylinders 13a, 13b, 13c, 13d by the width direction registration device 21 is determined from the state where the blanket cylinders 13a, 13b, 13c, 13d nip the web W. The blanket cylinders 13a, 13b, 13c, and 13d are in contact with the web W without nip from the state in which the web W is nipped. It may be during switching to the state (during cylinder unloading) or during the state in which the web W is in contact without being nipped (after cylinder unloading).

  Further, as in the present embodiment, the printing machine changes the speed of the surface of the blanket cylinders 13a, 13b, 13c, and 13d at the time of the peeling removal process, and the speed of the surface of the blanket cylinders 13a, 13b, 13c, and 13d. Is preferably lower than the speed of the web W. Thereby, the conveyance speed of the web W can be maintained, and the pile can be removed while reducing the influence on the entire printing press.

  The control device 51 sets the phase of the blanket cylinders 13a, 13b, 13c, and 13d with respect to the web W before the peeling removal process and the phase of the blanket cylinders 13a, 13b, 13c, and 13d with respect to the web after the peeling removal process to the same phase. It is preferable. Here, the phase of the blanket cylinders 13a, 13b, 13c, and 13d with respect to the web W is continued even during the removal process of the area where the blanket cylinders 13a, 13b, 13c, and 13d are transferred to the web W during one rotation. Is the relationship between the position of the web W and the positions of the blanket cylinders 13a, 13b, 13c, 13d. It is also the position when the web W is cut to the same length on the downstream side of the blanket cylinders 13a, 13b, 13c, 13d. When the speed of the surface of the blanket cylinders 13a, 13b, 13c, and 13d is reduced with respect to the conveyance speed of the web W, the control device 51 temporarily changes the speed of the surface of the blanket cylinders 13a, 13b, 13c, and 13d to the web W. And the same phase as that of the blanket cylinders 13a, 13b, 13c, 13d with respect to the web W. In addition, the blanket cylinders 13a, 13b, 13c, and 13d are delayed by an integer number of revolutions in the pile removal process so that the phases of the blanket cylinders 13a, 13b, 13c, and 13d with respect to the web W are the same. As a result, the pile removal process can be performed while reducing the influence on the upstream and downstream controls of the blanket cylinders 13a, 13b, 13c, and 13d. Control downstream of the blanket cylinders 13a, 13b, 13c, and 13d includes a step of cutting the printed material.

  In the above-described embodiment, the case where the pile removal process is executed at the time of pasting (at the time of paper splicing) has been described, but the present invention is not limited to this. The piling removal process can be executed in various cases where the web W passing through the printing unit is not used as a product.

  FIG. 8 is a timing chart showing another example of the peeling removal process of the printing unit according to the present embodiment. The process shown in FIG. 8 is a process in the case where the piling removal process is executed while the web W conveyance speed is accelerated, such as when the conveyance of the web W is started or when the printing speed is changed. In the process shown in FIG. 8, the conveyance is started from the state in which the web W is stopped, the conveyance speed is accelerated to a speed at which printing can be started, and thereafter the constant speed is reached.

  The control device 51 starts transporting the web W at time t11 and rotates the blanket cylinder 13 in accordance with the speed of the web W. At this time, the ink application roller 14, the swim roller 83, and the blanket cylinder 13 are all in a detached state.

  Next, supply of dampening water is started at time t12, the swimsuit roller 83 is put on the plate cylinder, and the blanket cylinder 13 is also put on. The fountain solution supplies an amount V2 that is greater than the amount V1 when printing is performed. Thereafter, at time t13, the blanket cylinder 13 and the swimsuit roller 83 are removed, and the supply of dampening water is also stopped. That is, the supply amount of dampening water is set to 0 from the amount V2. At this time, the rotational speed of the blanket cylinder 13 is set to a constant speed and slower than the web W. Thereafter, the rotational speed of the blanket cylinder 13 starts increasing at time t14, and is increased to the same speed as the web W at time t15. In addition, at time t15, the swimsuit roller 83 is put on and the supply of dampening water is started. That is, the supply amount of the dampening water is set from 0 to the amount V1. Thereafter, the blanket cylinder 13 is put on at time t16, and the ink applying roller 14 is put on at time t17. Thereafter, at time t18, the speed increase of the web W and the blanket cylinder 13 is stopped, and the speed is kept constant.

  As shown in FIG. 8, the printing press is in contact with the blanket cylinder 13 in a state where the web W is not nipped even when the web W is accelerated, and the web W and the blanket cylinder 13 have different speeds. Specifically, the pile can be removed between time t13 and time t15 in FIG. In addition, although it becomes the same speed by control, it can remove a pile from time t15 to time t16 during which the blanket cylinder 13 is moving. In this way, since the web W is conveyed without printing the product even when the web W is accelerated, the removal of the pile can be performed using the web W that becomes the waste paper. Even if the blanket cylinder 13 is removed, in the case of a printing machine in which the blanket cylinder 13 and the plate cylinder 12 are in a worn state, even if the peeling removal process is being performed (from time t13 to time t15), A dampening water may be supplied to the blanket cylinder 13. That is, even if blanket cylinder removal processing is performed, in the case of a printing machine in which the blanket cylinder and the plate cylinder are in a worn state, the supply of dampening water during the peeling removal processing is not stopped and the swimsuit roller 83 separation processing is not performed. During the peeling removal process (from time t13 to time t15), the swimsuit roller 83 may be always put on and supply of the dampening water to the blanket cylinder 13 may be continued.

  FIG. 9 is a timing chart showing another example of the peeling removal process of the printing unit according to the present embodiment. The process shown in FIG. 9 shows a process in the case where the piling removal process is executed while the conveyance speed of the web W is reduced, such as when the conveyance of the web W is stopped and the conveyance speed is changed after the printing is finished. . In the process shown in FIG. 9, the web W is moved at a constant speed, and the printing speed is decelerated from the state where printing is being executed until it stops thereafter.

  In the printing machine before the time t21, all of the ink application roller 14, the swimsuit roller 83, and the blanket cylinder 13 are in an attached state. When detecting an instruction to stop the printing press, the control device 51 increases the supply amount of dampening water from the amount V1 to the amount V2 at time t20. Next, at time t <b> 21, the ink application roller 14, the swim roller 83, and the blanket cylinder 13 are removed, and the supply of dampening water is stopped. That is, the supply amount of dampening water is reduced from the amount V2 to zero. Further, the speed of the blanket cylinder 13 is lower than that of the web W. That is, the acceleration on the deceleration side of the blanket cylinder 13 is made larger than that of the web W. Next, the control device 51 reduces the acceleration on the deceleration side of the blanket cylinder 13 at time t22 and reduces the speed difference between the web W and the blanket cylinder 13. Thereafter, the conveyance of the web W is stopped at time t24.

  As shown in FIG. 9, the printing machine is in contact with the blanket cylinder 13 in a state where the web W is not nipped even when the web W is decelerated, and the web W and the blanket cylinder 13 have different speeds. Specifically, the piling can be removed between time t21 and time t24 in FIG. In this manner, since the web W is conveyed without printing the product even when the web W is decelerated, the removal of the pile can be performed using the web W that becomes the waste paper. Even if blanket cylinder removal processing is performed, in the case of a printing press in which the blanket cylinder 13 and the plate cylinder are in a worn state, the blanket cylinder 13 from the plate cylinder 12 even during the peeling removal process (from time t21 to time t24). A dampening solution may be supplied. That is, even if the blanket cylinder 13 is removed, in the case of a printing machine in which the blanket cylinder 13 and the plate cylinder 12 are in a worn state, the supply stop of the dampening water during the peeling removal process and the removal process of the swim roller 83 are performed. It is not carried out, and it is possible to always keep the swimsuit roller 83 in the wearing state and continue to supply the dampening water to the blanket cylinder 13 during the pile removal process (from time t21 to time t24).

  Further, in the above embodiment, the pasting signal is detected and the piling removal process is automatically executed. However, when the operator determines that the web W passing through the printing unit is not used (cannot be used) as a product, etc. The piling removal process may be executed by the operator's operation. In this case, it is preferable to input an operation for starting the peeling removal process, and the subsequent process is executed by the control device 51. As a result, the pile removal process can be executed when the portion that becomes the waste paper passes through the blanket cylinder.

  In the printing machine according to the above embodiment, the blanket cylinders 13a, 13b, 13c, and 13d are in contact with the web W even when the blanket cylinders 13a, 13b, 13c, and 13d are released from the nip state. Not. FIG. 10 is a schematic configuration diagram illustrating a printing unit according to another embodiment. The printing unit shown in FIG. 10 has a web path adjusting roller 25. In the printing unit shown in FIG. 10, when the blanket cylinders 13a, 13b, 13c, and 13d are removed, the blanket cylinders 13a, 13b, 13c, and 13d are separated from the web W as shown in FIG. . The web path adjusting roller 25 is disposed between the blanket cylinder 13a and the blanket cylinder 13b, between the blanket cylinder 13b and the blanket cylinder 13c, and between the blanket cylinder 13c and the blanket cylinder 13d. It is arranged so that it can move in the crossing direction. The web path adjusting roller 25 is disposed at a position indicated by a solid line at the time of printing and is in a non-contact state with the web W, and is disposed at a position of a dotted line at the time of the peeling removal process and is in contact with the web W. The web W passes through positions where the conveyance path is changed by the web path adjusting roller 25 and is in contact with the blanket cylinders 13a, 13b, 13c, and 13d.

  As described above, the state in which the blanket cylinders 13a, 13b, 13c, and 13d do not nip the web W but are in contact with the web W is the path of the web W in addition to the movement of the blanket cylinders 13a, 13b, 13c, and 13d. You may implement | achieve using the mechanism which adjusts.

  Although the present embodiment and its modification have been described above, the present embodiment and its modification are not limited by the above-described content. In addition, constituent elements of the above-described embodiment and modifications thereof include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. In addition, various omissions, substitutions, and changes of the constituent elements can be made without departing from the scope of the present embodiment and its modifications.

R paper feeding device R1 to R8 paper feeding unit U printing device U1 to U6, U11 to U62 printing unit 12, 12a, 12b, 12c, 12d plate cylinder 13, 13a, 13b, 13c, 13d blanket cylinder 61 ink supply device 14, 14a, 14b, 14c, 14d Inking roller 15, 15a, 15b, 15c, 15d Ink fountain D Web pass device D1, D2 Web pass unit F Folding machine F1, F2 Folding unit W Web 21 Width register correcting device 22a, 22b, 22c, 22d Blanket cylinder cleaning device 51 Control device 81 Water rider roller 82 Water reciprocating roller 83 Swimsuit roller 84 Spray nozzle 85 Swimsuit roller moving mechanism

Claims (10)

A blanket cylinder that is in contact with the web to be conveyed;
A plate cylinder in contact with the blanket cylinder and mounted with a printing plate;
A conveying device for conveying the web;
A switching device that switches between a state in which the blanket cylinder nips the web and a state in which the web is in contact without niping;
A control device for controlling the transfer device and the switching device,
The control device is in a state in which the web is not niped by the switching device when the non-product portion of the web passes through the blanket cylinder, and the speed of the surface of the blanket cylinder, and A printing machine characterized by executing a piling removal process with different web speeds.   The printing machine according to claim 1, wherein the conveyance device includes an adjustment device that adjusts a tension of the web.   The printing press according to claim 1 or 2, wherein the portion of the web that does not become a product includes a paper splicing portion in which the two webs are laminated. A cleaning liquid supply device for supplying a cleaning liquid to the blanket cylinder;
The printing machine according to any one of claims 1 to 3, wherein the control device supplies the cleaning liquid at the time of performing a piling removal process. In the width direction of the web, it has a width direction position adjustment device that changes the position of the web relative to the blanket cylinder,
5. The printing press according to claim 1, wherein the control device changes the position of the web with respect to the blanket cylinder when the pile removal process is executed. 6. A blanket cylinder cleaning device for cleaning the blanket cylinder;
6. The printing press according to claim 1, wherein the control device performs a cleaning process by the blanket cylinder cleaning device during the execution of the piling removal process. A blanket cylinder cleaning device for cleaning the blanket cylinder;
6. The printing press according to claim 1, wherein the control device does not execute the cleaning process by the blanket cylinder cleaning device during the execution of the piling removal process.   The controller changes the speed of the surface of the blanket cylinder when a portion of the web that does not become a product passes through the blanket cylinder so that the speed of the surface of the blanket cylinder is lower than the speed of the web. The printing press according to any one of claims 1 to 7, wherein   The said control apparatus makes the phase of the said blanket cylinder with respect to the said web before a peeling removal process, and the phase of the said blanket cylinder with respect to the said web after a peeling removal process the same phase, The Claim 1 characterized by the above-mentioned. The printing machine as described in any one of 8. A blanket cylinder that is in rolling contact with the web to be conveyed; a plate cylinder that is in rolling contact with the blanket cylinder and mounted with a printing plate; a conveying device that conveys the web; and the blanket cylinder that nips the web; A method of removing a piling from a printing press comprising a switching device for switching between a state where the web is in contact without being nipped,
When the non-product portion of the web passes through the blanket cylinder, the switching device is in contact with the web without niping, and the speed of the surface of the blanket cylinder is different from the speed of the web. A method of removing a pile, characterized by being a speed.

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