JP2005088542A - Washing device for printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent a rotator or a washing web from being damaged by bringing the sections being wetted with a washing liquid of the washing web into contact with the rotator regardless of the quality of the material of washing materials or the structure of a washing device. <P>SOLUTION: A washing nozzle 6g is provided on the upstream side in the moving direction of a washing cloth 6i and a lower side from a contact section at which the washing cloth 6i and a rubber drum 5 come into contact. As an initial cloth feeding, the washing cloth 6i is idly fed twice during a period from when the washing liquid is fed to the washing cloth 6i to when the washing cloth 6i is brought into contact with the rubber drum 5, and the section of the washing cloth 6i to which the washing liquid has been fed is made into the contact section with the rubber drum 5. The frequency of the initial cloth feeding is not limited to twice, and may be once, or may be three times or more. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning device for a printing press for cleaning a rotary body (rubber cylinder, impression cylinder, transfer cylinder, plate cylinder, roller of an inking device, etc.) of a printing press.

  Conventionally, when a rubber cylinder, for example, is cleaned as a rotating body of a printing press, a cleaning liquid is sprayed on the cleaning web, and the cleaning web impregnated with the cleaning liquid is brought into contact with the rotating rubber cylinder. When the portion of the cleaning web in contact with the rubber cylinder becomes dirty, the cleaning web is detached from the rubber cylinder, the dirty portion of the cleaning web is wound up, and the clean portion of the cleaning web is brought into contact with the rubber cylinder (see Reference 1). ).

  Ink adheres to the surface of the rotating body before cleaning. When the dry cleaning web is brought into contact with the surface of the rotating body to which the ink is adhered, the cleaning web adheres to the rotating body by the ink, and the cleaning web is pulled out from the cleaning device by the rotation of the rotating body, and is pulled out. The washed web is wound around the rotating body and damages the surface of the rotating body (if the rotating body is a rubber cylinder, there is a risk of damaging peripheral members such as the plate cylinder and impression cylinder). There is a problem of cutting. Further, even if the cleaning web dried in the first stage of the cleaning operation is brought into contact with the rotating body, the ink adhering to the rotating body cannot be wiped off. As a result, the cleaning operation takes time.

  Therefore, the first contact of the cleaning web impregnated with the cleaning liquid with the rotating body is not intended to wipe the dirt of the rotating body with the cleaning web, but the part wetted with the cleaning liquid of the cleaning web is rotated. The object is to prevent the cleaning web from being pulled out of the cleaning device by contacting the body. Further, by bringing the cleaning web impregnated with the cleaning liquid into contact with the rotating body, the cleaning liquid is supplied to the surface of the rotating body, and the ink adhering to the surface of the rotating body is easily peeled off. Thereafter, the cleaning operation can be effectively performed by wiping with a dry cleaning web.

  In Patent Document 1, a cleaning liquid is first sprayed on a cleaning web, and after a predetermined time has elapsed, the cleaning web is brought into contact with a rotating body to clean the surface. That is, by providing a time lag before spraying and bringing the cleaning web into contact with the rotating body, the cleaning liquid is diffused (penetrated) from the sprayed portion to the contact portion with the rotating body, and the portion of the cleaning web wetted by the cleaning liquid is removed. It is made to contact a rotating body.

JP-A-55-148164

  However, in a conventional cleaning device for a printing press, due to the material of the cleaning material and the structure of the cleaning device, the portion wetted with the cleaning liquid of the cleaning web cannot be reliably brought into contact with the rotating body simply by providing a time lag. That is, the time and range in which the cleaning liquid is diffused differ depending on the material of the cleaning web and the components of the cleaning liquid, and even if a time lag is provided, the cleaning liquid may not diffuse to the contact portion with the rotating body. In particular, when the position for supplying the cleaning liquid is below the contact portion of the cleaning web with the rotating body, the shape is against gravity, and thus there is a high possibility that the cleaning liquid does not reach the contact portion with the rotating body.

  The present invention has been made in order to solve such problems. The object of the present invention is to make a portion of the cleaning web wetted by the cleaning liquid, regardless of the material of the cleaning material and the structure of the cleaning device, as a rotating body. It is an object of the present invention to provide a cleaning device for a printing press that can be brought into contact with each other and reliably prevent damage to a rotating body and a cleaning web.

In order to achieve such an object, the present invention provides a cleaning web supported so as to be able to come into contact with and away from the rotating body, cleaning web contact means for bringing the cleaning web into contact with the rotating body, and the cleaning web facing the rotating body. Cleaning liquid supply means for supplying the cleaning liquid upstream of the moving part, and the cleaning web traveling between the time when the cleaning liquid is supplied to the cleaning web and the time when the cleaning web is brought into contact with the rotating body. The cleaning web feeding means is provided in which the portion supplied with is used as a contact portion with the rotating body.
According to this invention, after the cleaning liquid is supplied to the cleaning web, the portion of the cleaning web that has been supplied with the cleaning liquid is brought into contact with the rotating body by the movement (movement) of the cleaning web until it is brought into contact with the rotating body. Part. As a result, even if no time lag is provided, the portion of the cleaning web wetted with the cleaning liquid (the portion supplied with the cleaning liquid) can be immediately used as the contact portion with the rotating body.

  The present invention is particularly effective in a cleaning apparatus that moves the portion of the cleaning web supplied with the cleaning liquid upward. In this case, the cleaning liquid supplied to the cleaning web does not easily penetrate upward, and the cleaning web is forced to run upward, so that the portion wetted with the cleaning liquid (the portion supplied with the cleaning liquid) is surely secured. It can be a contact portion with the rotating body.

  Further, in the present invention, the cleaning web feeding means includes a configuration in which the cleaning web is fed using attachment / detachment of the cleaning unit, and a configuration in which an actuator dedicated to cloth feeding is provided in addition to the actuator for attaching / detaching the cleaning unit. The cleaning web also includes cloth, paper, etc., and traveling of the cleaning web includes intermittent feed and continuous feed. In the present invention, the “cleaning liquid” includes “solvent”, “water”, and “mixed liquid of solvent and water”.

  Further, in the present invention, for example, a cleaning nozzle is used as a cleaning liquid supply means for supplying a cleaning liquid to the upstream side of the moving direction from the contact portion facing the rotating body of the cleaning web. The position of the cleaning nozzle is the rotation of the cleaning web. It does not have to be on the upstream side in the movement direction with respect to the contact portion facing the body. In other words, the cleaning nozzle may be located on the downstream side in the movement direction as long as the cleaning liquid can be supplied to the upstream side in the movement direction with respect to the contact portion facing the rotating body of the cleaning web. The cleaning liquid supply means includes a roller, a pad moistened with a cleaning liquid, and the like in addition to the nozzle.

  As the cleaning web feeding means, contact / separation means for bringing the cleaning web into and out of contact with the rotating body is used, and it is considered that the cleaning web travels in conjunction with the approaching or separating operation of the cleaning web with respect to the rotating body. It is done. According to this configuration, since the cleaning web can be sent using the contacting / separating means for bringing the cleaning web into and out of contact with the rotating body, the entire apparatus can be made compact and the cost can be reduced. it can. As components of the contact / separation means, an air cylinder, a hydraulic cylinder + valve, a feed screw and a motor, a rack and a pinion, a solenoid, and the like can be used. In addition, in this configuration, if a fixed-size feed mechanism is provided that makes the cleaning web feed amount constant by the cleaning web feeding means regardless of the winding amount of the cleaning web wound around the take-up shaft, the cleaning web can be used. Regardless of the state, the travel amount until the portion supplied with the cleaning liquid is made a contact portion with the rotating body can be always constant.

  Further, as the contact / separation means, for example, a switching means for switching between an operating state in which the cleaning web is brought into contact with the rotating body and a retracted state in which the cleaning web is separated from the rotating body, and a switching signal from the retracted state to the operating state is supplied to the switching means. Before the contact of the cleaning web with the rotating body is completed, the switching signal from the operating state to the retracted state is output to the switching means, and the output of the switching signal is repeated at least once, and then from the retracted state. A configuration is also conceivable in which control means for outputting a switching signal to the operating state to the switching means to bring the cleaning web into contact with the rotating body is also conceivable. In this configuration, paying attention to the fact that it takes time until the contact of the cleaning web with the rotating body is completed after the switching signal (arrival signal) from the retracted state to the operating state is output. Even if the cleaning web is sent by attaching / detaching the cleaning web to / from the rotating body by outputting a switching signal (de-signaling) from the operating state to the retracted state, the cleaning web is sent without contacting the rotating body. Can do.

  According to the present invention, after the cleaning liquid is supplied to the cleaning web, the portion of the cleaning web to which the cleaning liquid is supplied becomes the contact portion with the rotating body by running the cleaning web until it is brought into contact with the rotating body. Regardless of the material of the cleaning material and the structure of the cleaning apparatus, the portion wetted with the cleaning liquid of the cleaning web can be reliably used as the contact portion with the rotating body, and damage to the rotating body and the cleaning web can be prevented.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an outline of a four-color sheet-fed printing press used in the embodiment of the present invention. 1 is a paper feeding device, 2 is a paper discharging device, and 3 (3-1 to 3-4) are paper feeding devices. Each color printing unit is located between the apparatus 1 and the paper discharge apparatus 2.

  The printing unit 3 (3-1 to 3-4) has a plate cylinder 4 (4-1 to 4-4) on which a printing plate is mounted, and is mounted on the plate cylinder 4 (4-1 to 4-4). The rubber cylinder 5 (5-1 to 5-4) to which the ink from the printed printing plate is transferred and the ink on the rubber cylinder 5 (5-1 to 5-4) by holding and conveying the sheet-like material An impression cylinder 9 (9-1 to 9-4) for transferring to a sheet-like material is provided. For the rubber cylinder 5 (5-1 to 5-4), a cleaning device 6 (6-1 to 6-4) for cleaning the surface of the rubber cylinder 5 (5-1 to 5-4) is provided. ing.

  Further, the four-color sheet-fed printing press includes a control device (printing device control device) 7 for controlling the operation of the printing press including the cleaning operation (cleaning + drying) of the rubber cylinder 5 using the cleaning device 6; A printing press control device 7 and a central control device 8 connected via wireless or wired communication means are provided. Although not shown in the printing unit 3, a roller group of an inking device that supplies ink to the printing plate mounted on the plate cylinder 4, a roller group of a water supply device that supplies water to the printing plate, and an impression cylinder An impression cylinder cleaning device for cleaning the upper surface of 9b is provided, and a transfer cylinder 10 is provided between the impression cylinders 9 of the printing units of the respective colors.

[Cleaning equipment]
FIG. 2 is a side view showing the cleaning device 6. FIG. 2A shows a state in which the cleaning web is separated from the rubber cylinder, and FIG. 2B shows a state in which the cleaning web is in contact with the rubber cylinder. Is shown. 2 is provided in front of the rubber cylinder 5, and is provided with a pair of left and right unit frames 6b and 6b (one unit frame is attached to the stay 6a so as to be parallel to each other). (Not shown). A drive lever 6c is fixed to a shaft 6d whose lower end is rotatably supported between the frames, and a cleaning unit 6e including a stay 6a and left and right unit frames 6b and 6b is attached to and detached from the drive lever 6c. It is fixed freely.

  The stay 6a is provided with a cleaning pad 6f having a substantially U-shaped cross-section having a substantially the same width as that of the rubber cylinder 5, and is provided with a cleaning nozzle 6g. The cleaning nozzle 6g is provided with the cleaning nozzle 6g. The solvent and water are discharged from the tank. A supply roll comprising a cylindrical core material (unwinding shaft) 6h and a cleaning cloth 6i as a cleaning web wound around the core material 6h in a separate process is provided at a substantially central portion of the left and right unit frames 6b, 6b. 6j is supported rotatably and detachably. Further, on the rubber cylinder 5 side of the left and right unit frames 6b, 6b, a winding roll 6m comprising a cylindrical core material (winding shaft) 6k and a cleaning cloth 6i wound on the core material 6k. It is pivotally supported so as to be rotatable and detachable.

  FIG. 3 is a front cross-sectional view showing a state where the winding roll 6m is attached. In the drawing, the right unit frame 6b is provided with a shaft 6n into which a convex portion 6k1 protruding from one of the winding shafts 6k is fitted, and the left unit frame 6b protrudes from the other of the winding shafts 6k. A shaft 6o into which the convex portion 6k2 is fitted is provided. The shaft 6n is pivotally supported by the right unit frame 6b and the shaft 6o is pivotally supported by the left unit frame 6b.

  A view of the shaft 6n viewed from the A direction is shown in FIG. A view of the shaft 6o viewed from the B direction is shown in FIG. A recess 6n2 is formed in the head 6n1 of the shaft 6n. The convex part 6k1 of the winding shaft 6k is fitted into the concave part 6n2. A groove 6o2 is formed in the head 6o1 of the shaft 6o. Further, a ring 6o4 is fitted on the outer periphery of the head 6o1. The ring 6o4 is pressed against the flange surface of the head 6o1 by a spring 6o3. After inserting the convex portion 6k2 of the winding shaft 6k into the groove 6o2 while retracting the ring 6o4 against the spring 6o3, when the hand is released from the ring 6o4, the ring 6o4 is returned to the original position by the restoring force of the spring 6o3. Returning, the convex portion 6k2 is locked in the groove 6o2.

  Reference numeral 6p denotes a lever for winding the cleaning cloth, which is a V-shaped flat plate, and a roller 6q1 is pivotally attached to one end. The central portion of the lever 6p is connected to the end of the shaft 6o via a one-way clutch 6r1. Further, the central portion of the lever 6p is urged in the clockwise direction of FIG. 2 by a spring 6s1 with the shaft 6o as a rotation center. The shaft 6o is supported on the left unit frame 6b via a one-way clutch 6r2.

  Reference numeral 6t denotes a fixed-size feed lever. A roller 6q2 is pivotally attached to one end portion via a shaft 6u, and the other end portion is pivotally supported on the unit frame 6b. A spring 6s2 is stretched between the lever 6t and the lever 6p so that the roller 6q2 pivotally attached to the lever 6t is pressed against the cleaning cloth 6i of the take-up roll 6m. The roller 6q2 is pivotally attached to the lever 6t via a shaft 6u, and the end of the shaft 6u penetrates the unit frame 6b and engages with the cam surface 6p1 of the lever 6p.

  6v is a lever actuating pin for winding the cleaning cloth implanted in the frame. 6w is an air cylinder. The operating rod 6w1 of the air cylinder 6w is pivotally attached to the upper end of the drive lever 6c. The air cylinder 6w includes two ports Pa and Pb. When the compressed air is sent to the port Pa, the operating rod 6w1 moves forward, and when the compressed air is sent to the port Pb, the operating rod 6w1 moves backward.

  In the state shown in FIG. 2A, when the operating rod 6w1 moves forward, the drive lever 6c rotates clockwise about the shaft 6d, and the cleaning unit 6e moves to the rubber cylinder 5 side. As shown in 2 (b), the cleaning cloth 6i is pressed against the surface of the rubber cylinder 5 by the cleaning pad 6f. During the forward movement of the actuating rod 6w1, in the cleaning unit 6e, the roller 9q1 hits the pin 6v and rotates the lever 6p counterclockwise. As a result, the take-up shaft 6k rotates counterclockwise and winds the cleaning cloth 6i.

  In the state shown in FIG. 2B, when the actuating rod 6w1 moves backward, the drive lever 6c rotates counterclockwise about the shaft 6d as a rotation center, and as shown in FIG. The cloth 6i is separated from the surface of the rubber cylinder 5. During the backward movement of the operating rod 6w1, in the cleaning unit 6e, the lever 6p is rotated clockwise by the urging force of the spring 6s1. Thereby, the roller 9q1 returns to the original position, and a gap is created between the roller 6q1 and the pin 6v. In this case, as shown in FIG. 3, since the one-way clutch 6r is provided between the lever 6p and the shaft 6o and between the unit frame 6b and the shaft 6o, the winding shaft 6k is rotated clockwise. Therefore, the cleaning cloth 6i is not unwound from the take-up roll 6m.

  The outer diameter of the winding roll 6m increases as the cleaning cloth 6i is wound up. FIG. 5 shows a state in which the outer diameter of the winding roll 6m is increased. When the outer diameter of the winding roll 6m increases, the roller 6q2 that presses against the cleaning cloth 6i wound around the winding shaft 6k moves downward, and the lever 6t rotates clockwise. As a result, the engagement position between the end of the shaft 6u and the cam surface 6p1 of the lever 6p changes, and the facing distance between the roller 6q1 pivotally attached to the lever 6p and the pin 6v increases. As a result, the rotation angle of the lever 6p1 by one forward movement of the actuating rod 6w1 is regulated according to the outer diameter of the take-up roll 6m, so that the cleaning cloth 6i wound around the take-up shaft 6k is wound. The take-up amount, that is, the feed amount of the cleaning cloth 6i is always constant regardless of the outer diameter of the take-up roll 6m. In this embodiment, this mechanism is called a fixed-size feed mechanism.

  In the present embodiment, the cleaning nozzle 6g is provided on the upstream side in the movement direction of the cleaning cloth 6i and below the contact portion where the cleaning cloth 6i and the rubber cylinder 5 are in contact with each other. As a result, the solvent and water from the cleaning nozzle 6g are discharged onto the cloth surface located below the contact portion of the cleaning cloth 6i with the rubber cylinder 5, and permeate from the discharged cloth surface. go. In the present embodiment, the cleaning cloth 6i moves in the direction of arrow C (upward) in FIG.

[Printer control device]
FIG. 6 is a block diagram of the printing press control device 7. In the figure, 7-1 is a CPU, 7-2 is a RAM, 7-3 is a ROM, 7-4 is a cleaning start button, 7-5 is a rotary encoder that detects the rotation of the rubber cylinder 5, and 7-6 is a print. A motor driver that drives a motor (not shown) of the machine. 7-7, 7-8, 7-9 and 7-10 are components such as valves and counters related to cleaning operations in the printing units of the first, second, third and fourth colors, and V1 is a unit. A detachable valve, V2 is a solvent discharge valve, V3 is a water discharge valve, V4 is an air injection valve, TM is a timer, CNT1 is a unit detachment counter, CNT2 is a discharge counter, and CNT3 is a total cloth feed counter. 7-11 is a cleaning pattern data memory, and 7-12 is an interface that mediates transmission / reception of signals to / from the central controller 8. The CPU 7-1 operates according to the program stored in the ROM 7-3 while accessing the RAM 7-2 and the memory 7-11.

The unit attachment / detachment valve V1 is a valve that sends compressed air to the ports Pa and Pb of the air cylinder 6w in the cleaning device 6. When the unit attachment / detachment valve V1 is turned on, the operation rod 6w1 of the air cylinder 6w moves forward, and when it is turned off, the operation rod 6w1 moves backward.
The solvent discharge valve V2, the water discharge valve V3, and the air injection valve V4 are valves for discharging the solvent and water from the cleaning nozzle 6g in the cleaning device 6.
The unit attachment / detachment counter CNT1 is a counter that counts the number of attachments / detachments of the cleaning cloth 6i to / from the rubber cylinder 5 in the cleaning device 6, and the discharge counter CNT2 is a solvent or water for the cleaning cloth 6i from the cleaning nozzle 6g in the cleaning device 6. It is a counter that counts the number of discharges. The total cloth feed counter CNT3 is a counter that counts the total number of times the cleaning cloth 6i is fed (the number of forward movements of the operating rod 6w1) in the cleaning device 6.
The timer TM is used for measuring the wearing time of the cleaning cloth 6i with respect to the rubber cylinder 5 in the cleaning device 6, and measuring the time taken off.

  FIG. 7 shows a configuration for discharging the solvent and water from the cleaning nozzle 6 g of the cleaning device 6. In the figure, 11 is a solvent tank in which a solvent is stored, 12 is a pressurized air source, 13 is a water tank in which water is stored, 14 is a solvent from the solvent tank 11 and each printing unit 3 (3-1 to 3). -4) is a first diverter for diverting to the cleaning nozzle 6g, 15 is a cleaning nozzle provided in each printing unit 3 (3-1 to 3-4) for compressed air from the pressurized air source 12 A second diverter 16 for diverting to 6 g is a third diverter 16 for diverting water from the water tank 13 to the cleaning nozzle 6 g provided in each printing unit 3 (3-1 to 3-4). A solvent tank 11, a pressurized air source 12, a water tank 13, and flow dividers 14, 15, and 16 are provided for the entire printing unit.

  Each color printing unit is provided with a solvent discharge valve V2, a water discharge valve V3, and an air injection valve V4. When the solvent discharge valve V2 is turned on, the solvent discharge valve V2 is turned on from the solvent tank 11 via the check valve VA. Solvent is sent to the current collector FG. When the water discharge valve V3 is turned on, water from the water tank 13 is sent to the current collector FG via the check valve VB. When the air injection valve V4 is turned on, the compressed air from the pressurized air source 12 is sent to the current collector FG via the check valve VC.

  In the present embodiment, when the solvent is discharged, the solvent discharge valve V2 and the air injection valve V4 are turned on simultaneously. As a result, the solvent from the solvent tank 11 and the compressed air from the pressurized air source 12 are collected by the current collector FG and discharged from the cleaning nozzle 6g. When water is discharged, the water discharge valve V3 and the air injection valve V4 are turned on simultaneously. Thereby, the water from the water tank 13 and the compressed air from the pressurized air source 12 are collected by the current collector FG and discharged from the cleaning nozzle 6g.

  The cleaning pattern data memory 7-11 includes a pattern data memory SM1 for the first color printing unit, a pattern data memory SM2 for the second color printing unit, a pattern data memory SM3 for the third color printing unit, and a fourth color. And a pattern data memory SM4 for the printing unit. In the pattern data memories SM <b> 1 to SM <b> 4, cleaning pattern data for each color printing unit transferred from the central controller 8 is written.

  In the present embodiment, there are four types of cleaning patterns, and cleaning pattern data is determined for each cleaning pattern (cleaning patterns 1, 2, 3, 4). The cleaning pattern data is composed of various cleaning parameters. In this example, the cleaning parameters are “cloth feeding frequency (C1) at spray interval 1”, “cloth feeding frequency (C2) at spray interval 2”, “solvent ejection time (t1)”, “water ejection time ( t8) ”,“ discharge count (S1) ”,“ total cloth feed count (CT1) ”,“ drying time (t9) ”,“ air injection time (t2) ”,“ unit wearing time (t6) ”,“ unit ” "Desorption time (t7)", "Initial cloth feed count (CT2)", "Liquid permeation standby time (t3)", "Unit wearing time during initial cloth feed (t4)", "Unit removal time during initial cloth feed (T5) "is used.

  The “liquid permeation standby time (t3)”, “unit wearing time during initial cloth feeding (t4)”, and “unit removal time during initial cloth feeding (t5)” are fixed values in each cleaning pattern. . Further, not all of these cleaning parameters are used in each cleaning pattern, but the cleaning parameters used are different in each cleaning pattern.

[Cleaning pattern 1 (standard)]
FIG. 8 shows a time chart when the cleaning operation is performed with “cleaning pattern 1”. FIG. 12 shows a setting example (default value) and setting range (changeable range) of the cleaning parameter set in “cleaning pattern 1”.
In “cleaning pattern 1”, the discharge number S1 is set to S1 = 3 as a default value. In this example, the solvent is discharged twice, the water is discharged once, and the cleaning liquid is discharged three times in total.

  Further, as default values, the solvent discharge time t1 is 0.4 seconds, the air injection time t2 is 2.0 seconds, the liquid permeation standby time t3 is 6.0 seconds, and the unit wearing time t4 during initial cloth feeding is 1.0. Second, unit removal time t5 at the initial cloth feed is 1.0 second, unit wearing time t6 at the normal cloth feed is 4.0 seconds, unit removal time t7 at the normal cloth feed is 1.0 second, water The discharge time t8 is 0.1 seconds, and the drying time t9 is 35 seconds.

  In addition, as a default value, the cloth feeding frequency C1 in the spray interval 1 (from the time when the solvent is first discharged to the time when water is discharged next) is set to 8 times, and the spray interval 2 (after the water is discharged) Next, the cloth feed frequency C2 is set to 2 times until the solvent is discharged), and the total cloth feed (from the start of the cloth feed at the unit wearing time t4 to the start of the drying time t9). Number of times (total number of cloth feeds) CT1 is 20, and the number of cloth feeds (initial cloth feed at the initial cloth feed (from the start of cloth feed at unit wearing time t4 to the start of cloth feed at unit wearing time t6)) The number of feeds) CT2 is set to 2 times.

  In these cleaning parameters, the liquid permeation waiting time t3, the unit wearing time t4 at the initial cloth feeding, and the unit removal time t5 at the initial cloth feeding are fixed values, but other than that can be changed by the central controller 8. Is possible. The change of the cleaning parameter in the central controller 8 will be described later.

  The liquid permeation waiting time t3, the unit wearing time t4 at the initial cloth feeding, and the unit removal time t5 at the initial cloth feeding are not necessarily fixed values, and may be changed in the same manner as other cleaning parameters. . However, the unit wearing time t4 at the initial cloth feeding is based on the premise that the cleaning cloth 6i does not contact the rubber cylinder 5. That is, when the unit attaching / detaching valve V1 is turned on and the operating rod 6w1 of the air cylinder 6w is advanced, the unit attaching / detaching valve V1 is turned off before the operating rod 6w1 is fully extended. It is assumed that the landing time t4 is set shorter than the operation time of the air cylinder 6w.

[Washing pattern 2 (thin dirt)]
FIG. 9 shows a time chart when the cleaning operation is performed with “cleaning pattern 2”. FIG. 13 shows a setting example (default value) and setting range (changeable range) of the cleaning parameter set in “cleaning pattern 2”. In the “cleaning pattern 2”, the discharge number S1 is set to S1 = 1 as a default value. In this example, the solvent is discharged once, the water is discharged 0 times, and the cleaning liquid is discharged once in total.

  Further, as default values, the solvent discharge time t1 is 0.4 seconds, the air injection time t2 is 2.0 seconds, the liquid permeation standby time t3 is 6.0 seconds, and the unit wearing time t4 during initial cloth feeding is 1.0. Seconds, unit removal time t5 at the time of initial cloth feeding is 1.0 second, unit wearing time t6 at the time of normal cloth feeding is 4.0 seconds, unit removal time t7 at the time of normal cloth feeding is 1.0 second, and drying The time t9 is 35 seconds, the total cloth feed number CT1 is 10 times, and the initial cloth feed number CT2 is 2 times.

[Washing pattern 3 (paper dust)]
FIG. 10 shows a time chart when the cleaning operation is performed with “cleaning pattern 3”. FIG. 13 shows a setting example (default value) and setting range (changeable range) of the cleaning parameter set in “cleaning pattern 2”. In the “cleaning pattern 2”, the discharge number S1 is set to S1 = 2 as a default value. In this example, the solvent is discharged once and the water is discharged once, and the cleaning liquid is discharged twice in total.

  Further, as default values, the solvent discharge time t1 is 0.4 seconds, the air injection time t2 is 2.0 seconds, the liquid permeation standby time t3 is 6.0 seconds, and the unit wearing time t4 during initial cloth feeding is 1.0. Second, unit removal time t5 at the initial cloth feed is 1.0 second, unit wearing time t6 at the normal cloth feed is 4.0 seconds, unit removal time t7 at the normal cloth feed is 1.0 second, water The discharge time t8 is 0.1 seconds, the drying time t9 is 35 seconds, the cloth feed number C1 at the spray interval 1 is 6, the total cloth feed number CT1 is 12, and the initial cloth feed number CT2 is 2.

[Washing pattern 4 (strong dirt)]
FIG. 11 shows a time chart when the cleaning operation is performed with “cleaning pattern 4”. FIG. 15 shows a setting example (default value) and setting range (changeable range) of the cleaning parameter set in “cleaning pattern 4”. In “cleaning pattern 4”, the discharge number S1 is set to S1 = 5 as a default value. In this example, the solvent is discharged three times, the water is discharged twice, and the cleaning liquid is discharged five times in total.

  Further, as default values, the solvent discharge time t1 is 0.4 seconds, the air injection time t2 is 2.0 seconds, the liquid permeation standby time t3 is 6.0 seconds, and the unit wearing time t4 during initial cloth feeding is 1.0. Second, unit removal time t5 at the initial cloth feed is 1.0 second, unit wearing time t6 at the normal cloth feed is 4.0 seconds, unit removal time t7 at the normal cloth feed is 1.0 second, water The discharge time t8 is 0.1 seconds, the drying time t9 is 35 seconds, the number of cloth feeds C1 at the spray interval 1 is 6, the number of cloth feeds C2 at the spray interval 2 is 3, and the total number of cloth feeds CT1 is The initial cloth feed count CT2 is 25 times 25 times.

[Washing (washing + drying)]
Next, the cleaning operation performed by the CPU 7-1 of the printing press control device 7 will be described with reference to the flowcharts shown in FIGS. Here, “cleaning pattern 1” will be described as an example, and the case where the default value is set as the cleaning parameter of “cleaning pattern 1” will be described as an example.

  The CPU 7-1 writes the cleaning pattern data of “cleaning pattern 1” transferred from the central controller 8 in the cleaning pattern data memory 7-11 (step 101 shown in FIG. 16). The cleaning pattern data of “cleaning pattern 1” exists for each printing unit, the cleaning pattern data for the first color printing unit is written in the pattern data memory SM1, and the cleaning pattern data for the second color printing unit is stored in the pattern data memory. Write to SM2. Further, the cleaning pattern data for the third color printing unit is written in the pattern data memory SM3, and the cleaning pattern data for the fourth color printing unit is written in the pattern data memory SM4.

  Hereinafter, the description will be made assuming that the cleaning operation of the rubber cylinder 5-1 of the first color printing unit 3-1 is performed. The cleaning operation is performed in the same manner for the second color, the third color, and the fourth color simultaneously with the cleaning operation of the rubber cylinder 5-1 of the first color printing unit 3-1. That is, in the present embodiment, the cleaning operation is performed simultaneously for all colors.

  The CPU 7-1 reads the output from the rotary encoder 7-5 and calculates the speed of the printing press (step 102). Then, based on the calculated speed of the printing press, it is determined whether the printing press is stopped or rotating at a low speed (step 103). If the printing machine is stopped or rotating at a low speed, the routine proceeds to step 104.

  When the cleaning start button 7-4 is turned on in step 104, it is checked whether the printing machine is stopped (step 105). If the printing press is not stopped (NO in step 105), it is determined that the printing press is at the cleaning speed, and the routine immediately proceeds to step 109 to perform the cleaning process. If the printing machine is stopped (YES in step 105), a low-speed drive command is sent to the motor driver 7-6 (step 106). As a result, the printing press starts to rotate. The CPU 7-1 reads the output from the rotary encoder 7-5, calculates the speed of the printing press (step 107), and if the printing press reaches a predetermined low speed (cleaning speed) (YES in step 108). Then, the process proceeds to step 109 to perform a cleaning process.

[Cleaning treatment]
FIG. 17 shows a flowchart of the “cleaning process” performed in step 109. In this “cleaning process”, the CPU 7-1 resets the count value S of the discharge counter CNT2 to set S = 0 (step 210). Further, the ejection number S1 (S1 = 3) is read from the pattern data memory SM1 (step 202). Further, the count value S of the discharge counter CNT2 is incremented by 1 to S = 1 (step 203), and the counted value S (S = 1) of the counted up discharge counter CNT2 is read (step 204). Then, the number of discharges S1 read in step 202 is checked (step 205). If S1 = 1, the process proceeds to step 206, and if not S1 = 1, the process proceeds to step 208.

  In this case, since the ejection number S1 read in step 202 is S1 = 3, the process proceeds to step 208. In step 208, it is checked whether the count value S of the discharge counter CNT2 read in step 204 is an even number or an odd number. If the count value S is an odd number, the process proceeds to “solvent discharge process” in step 209. If there is, the process proceeds to “Water discharge process” in step 210. In this case, since the count value S of the discharge counter CNT2 read in step 204 is S = 1, the process proceeds to “solvent discharge process” in step 209.

[Solvent discharge treatment]
FIG. 18 shows a flowchart of the “solvent discharge process” performed in step 209. In this “solvent discharge process”, the CPU 7-1 reads the solvent discharge time t1 (t1 = 0.4 seconds) and the air injection time t2 (t2 = 2.0 seconds) from the pattern data memory SM1 (steps 301 and 302). ). Then, the phase of the printing press (the rotation angle position of the rubber cylinder 5) is read from the output of the rotary encoder 7-5 (step 303). If the phase of the printing press becomes a predetermined phase (YES in step 304), the solvent discharge valve V2 and the air injection valve V4 are turned on (step 305: time T1 shown in FIG. 8). Thereby, the solvent from the solvent tank 11 is sent to the current collector TG, the compressed air from the pressurized air source 12 is sent to the current collector TG, and the solvent is supplied from the cleaning nozzle 6g of the cleaning device 6 to the cleaning cloth 6i. Discharged.

  At the same time, the timer TM starts counting, and if the time measured by the timer TM reaches the solvent discharge time t1 (t1 = 0.4 seconds) read in step 301 (YES in step 306), the timer TM is turned on. The solvent discharge valve V2 is turned off (step 307). If the time measured by the timer TM reaches the air injection time t2 (t2 = 2.0 seconds) read in step 302 (YES in step 308), the air injection valve V4 turned on in step 305 is turned off ( Step 309). Thereby, the first discharge of the solvent onto the cleaning cloth 6i is completed.

  When the first discharge of the solvent is completed, the CPU 7-1 checks the count value S of the discharge counter CNT (step 211 in FIG. 17). If S = S1, the process proceeds to “cloth feed 4 process” in step 212. If S = S1, the process proceeds to step 213. In this case, since S = 1 and S1 = 3, the process proceeds to step 213. In step 213, if S = 1, the process proceeds to “cloth feed 2 process” in step 214, and if S = 1, the process proceeds to “cloth feed 3 process” in step 215. In this case, since S = 1, the process proceeds to “cloth feed 2 process”.

[Cloth feed 2 processing]
FIG. 21 shows a flowchart of the “cloth feed 2 process” performed in step 214. In this “cloth feed 2 process”, the CPU 7-1 receives the initial cloth feed number CT2 (CT2 = 2 times), the cloth feed number C1 (C1 = 8 times) in the spray interval 1 from the pattern data memory SM1, and the unit. Wearing time t6 (t6 = 4.0 seconds), unit removal time t7 (t7 = 1.0 seconds), liquid permeation standby time t3 (t3 = 6.0 seconds), and unit wearing time during initial cloth feeding t4 (t4 = 1.0 seconds) and unit removal time t5 (t5 = 1.0 seconds) at the time of initial cloth feeding are read (steps 601 to 607).

  Then, the count value C of the unit attachment / detachment counter CNT1 is reset to C = 0 (step 608). Further, the count value CT of the total cloth feed counter CNT3 is reset and CT = 0 is set (step 609). Then, after the liquid permeation standby time t3 (t3 = 6.0 seconds) read in step 605 has elapsed (YES in step 610), the unit attachment / detachment valve V1 is turned on (step 611). In this case, by waiting for the liquid permeation standby time t3 to elapse, the solvent discharged from the cleaning nozzle 6g to the cleaning cloth 6i spreads from the discharged portion and permeates over a wide range.

  Next, the CPU 7-1 increases the count value C of the unit attachment / detachment counter CNT1 by 1 to C = 1 (step 612), and increases the count value CT of the total cloth feed counter CNT3 by 1 to CT = 1 (step 612). 613), the counted value C of the unit attachment / detachment counter CNT1 and the count value CT of the total cloth feed counter CNT3 are read (steps 614 and 615).

  Then, the count value C (C = 1) of the unit attachment / detachment counter CNT1 read in step 612 is compared with the initial cloth feed count CT2 (CT2 = 2) read in step 601 (step 616), and C> CT2 If so, the process proceeds to step 620, and if C> CT2, the process proceeds to step 617. In this case, since C = 1 and CT2 = 2, the process proceeds to step 617. In step 617, the CPU 7-1 waits for the elapse of the unit wearing time t4 (t4 = 1.0 seconds) at the initial cloth feeding read in step 606. If the unit wearing time t4 has elapsed (YES in step 617), the unit attaching / detaching valve V1 turned on in step 611 is turned off (step 618).

  At this time, the unit attaching / detaching valve V1 is turned on for t4 = 1.0 seconds, whereby the operating rod 6w1 of the air cylinder 6w in the cleaning device 6 moves forward, and the cleaning cloth 6i is taken up by the forward movement of the operating rod 6w1. A predetermined amount is wound up to 6 m. In this case, since the unit attachment / detachment valve V1 is turned off before the operation rod 6w is fully extended, the cleaning cloth 6i does not contact the rubber cylinder 5. That is, the cleaning cloth 6i is wound around the winding roll 6m by a predetermined amount without contacting the rubber cylinder 5.

  The CPU 7-1 turns off the unit attachment / detachment valve V1 in step 618, and then waits for the elapse of the unit removal time t5 (t5 = 1.0 seconds) at the initial cloth feeding read in step 607 (YES in step 619). ), Returning to step 611, the unit attaching / detaching valve V1 is turned on again. In this case, since C = 2 and CT2 = 2, the process proceeds to step 617 and subsequent steps in the same manner as described above. Thereby, the cleaning cloth 6i is wound around the winding roll 6m by a predetermined amount without coming into contact with the rubber cylinder 5 again. That is, the cloth is fed twice (initial cloth feed) together with the previous winding, and the portion of the cleaning cloth 6i where the solvent is discharged becomes the contact portion with the rubber cylinder 5.

  When the CPU 7-1 finishes the second cloth feed by the processing of Steps 617 to 619, the CPU 7-1 returns to Step 611 and turns on the unit attachment / detachment valve V1 again. In this case, since C = 3 and CT2 = 2, C> CT2, and the process proceeds to step 620 and subsequent steps. In step 620, the elapse of the unit arrival time t6 (t6 = 4.0 seconds) read in step 603 is awaited. If the unit wearing time t6 has elapsed (YES in step 620), the unit attaching / detaching valve V1 turned on in step 611 is turned off (step 621).

  At this time, the unit attaching / detaching valve V1 is turned on for t6 = 4.0 seconds, whereby the operating rod 6w1 of the air cylinder 6w in the cleaning device 6 moves forward, and the cleaning cloth 6i is taken up by the forward movement of the operating rod 6w1. At the same time that the predetermined amount is wound up to 6 m, the cleaning cloth 6 i comes into contact with the rubber cylinder 5. Here, the unit wearing time t6 is a time for which the rubber cylinder 5 is rotated several times in a state where the cleaning cloth 6i is pressed against the surface of the rubber cylinder 5, and during the unit wearing time t6, the cleaning cloth 6i is moved from the rubber cloth 5 to the rubber cylinder. A solvent is supplied to the surface of 5.

  In this way, in this embodiment, the cleaning cloth 6i from which the solvent has been discharged is fed twice as an initial cloth feed until the cleaning cloth 6i comes into contact with the rubber cylinder 5, and the portion of the cleaning cloth 6i from which the solvent has been discharged. Becomes a contact portion with the rubber cylinder 5. As a result, even if no time lag is provided, the portion of the cleaning web 6i that has been wetted with the solvent can be immediately made a contact portion with the rubber cylinder 5. In particular, the cleaning liquid discharged to the cleaning cloth 6i does not easily permeate upward, and the portion of the cleaning web 6i where the solvent is discharged is surely contacted with the rubber cylinder 5 by forcibly running the cleaning cloth 6i. The effect by being able to do is great. The function of the initial cloth feeding performed in cooperation with the hardware and software is the cleaning web feeding means in the present invention.

  Moreover, in this Embodiment, the winding amount (traveling amount) of the cleaning cloth 6i is always constant regardless of the outer diameter of the winding roll 6m by the constant dimension feeding mechanism. Therefore, when the initial cloth feed is carried out twice, regardless of the use state of the cleaning cloth 6i, the portion of the cleaning web 6i where the solvent is discharged is surely set as the contact portion with the rubber cylinder 5, and the surface of the rubber cylinder 5 Can be wet. Thereby, it is possible to reliably prevent the surface of the rubber cylinder 5 from being damaged and the cleaning cloth 6 i from being attached to the surface of the rubber cylinder 5 and being pulled out or cut.

  Further, in this case, the CPU 7-1 sends a switching signal from the retracted state (the state where the cleaning cloth 6i is separated from the rubber cylinder 5) to the operating state (the state where the cleaning cloth 6i is in contact with the rubber cylinder 5). After the contact of the cleaning cloth 6i with the rubber cylinder 5 is completed, the switching signal from the operating state to the retracted state is output to the unit attaching / detaching valve V1, and the switching signal is output twice. Then, it functions as a control means for outputting a switching signal from the retracted state to the operating state to the unit attaching / detaching valve V1 so that the cleaning cloth 6i is brought into contact with the rubber cylinder 5. Further, the unit attaching / detaching valve V1 functions as a switching means, and the control means and the switching means constitute a separating means in the present invention. In this example, the output of the switching signal is repeated twice, but it may be performed once or three times or more.

  In this embodiment, the initial cloth feed is performed using the unit attaching / detaching valve V1, but an actuator dedicated to initial cloth feeding is provided separately from the unit attaching / detaching valve V1, and the lever 6c is driven by this actuator to perform the initial cloth feeding. You may make it perform cloth feeding.

  In step 621, when the unit attaching / detaching valve V1 is turned off, the operating rod 6w1 of the air cylinder 6w in the cleaning device 6 is retracted, and the cleaning cloth 6i is separated from the surface of the rubber cylinder 5. The CPU 7-1 compares the count value C of the unit attachment / detachment counter CNT1 with the cloth feed count C1 (C1 = 8 times) read in step 602 simultaneously with the separation of the cleaning cloth 6i from the surface of the rubber cylinder 5 ( Step 622).

  In this case, since C = 3 and not C = C1, the process returns to step 611 after the elapse of the unit removal time t7 (t7 = 1.0 seconds) in step 623, and the cleaning cloth 6i with respect to the rubber cylinder 5 is returned. The intermittent contact, that is, the attachment / detachment of the cleaning cloth 6i with respect to the rubber cylinder 5 is repeated. If C = C1 is obtained by repetition of this attachment / detachment, that is, if the number of attachments / detachments of the cleaning cloth 6i to the rubber cylinder 5 including the number of initial cloth feeds is 8 (YES in Step 622), “cloth feed” 2 process "is complete | finished, and it returns to step 203 shown in FIG.

  In the “cloth feed 2 process”, after the cleaning cloth 6i is brought into contact with the surface of the rubber cylinder 5 for t6 hours and the operation of separating the cleaning cloth 6i for t7 hours is repeated six times, Wet. Therefore, a solvent is supplied from the cleaning cloth 6 i to the surface of the rubber cylinder 5, and the ink adhering to the surface of the rubber cylinder 5 is peeled off by this solvent and floats up from the surface of the rubber cylinder 5. In the second half, the dried portion of the cleaning cloth 6i sent out from the supply roll 6j comes into contact with the surface of the rubber cylinder 5, and the ink that floats from the surface of the rubber cylinder 5 is wiped off by the dried cleaning cloth 6i.

  After completion of the “cloth feed 2 process”, the CPU 7-1 increments the count value S of the discharge counter CNT2 by 1 to S = 2 in step 203, and the counted value S (S = 2) of the counted up discharge counter CNT2 ) Is read (step 204). Then, in response to NO in step 205, the process proceeds to step 208, and in response to YES in step 208, the process proceeds to “water discharge process” in step 210.

[Water discharge treatment]
FIG. 19 shows a flowchart of the “water discharge process” performed in step 210. In the “water discharge process”, the CPU 7-1 reads the water discharge time t8 (t8 = 0.1 seconds) and the air injection time t2 (t2 = 2.0 seconds) from the pattern data memory SM1 (steps 401 and 402). . Then, the phase of the printing press is read from the output of the rotary encoder 7-5 (step 403). If the phase of the printing press becomes a predetermined phase (YES in step 404), the water discharge valve V3 and the air injection valve V4 are turned on (step 405: time T2 shown in FIG. 8). Thereby, water from the water tank 13 is sent to the current collector TG, compressed air from the pressurized air source 12 is sent to the current collector TG, and water is supplied from the cleaning nozzle 6g of the cleaning device 6 to the cleaning cloth 6i. Discharged.

  At the same time, the timer TM starts counting, and if the timer TM time reaches the water discharge time t8 (t1 = 0.1 seconds) read in step 401 (YES in step 406), the timer TM is turned on in step 405. The water discharge valve V3 is turned off (step 407). If the time measured by the timer TM reaches the air injection time t2 (t2 = 2.0 seconds) read in step 402 (YES in step 408), the air injection valve V4 turned on in step 405 is turned off ( Step 409). Thereby, discharge of the water to the cleaning cloth 6i is completed.

  When the water discharge is completed, the CPU 7-1 checks the count value S of the discharge counter CNT (step 211 in FIG. 17). If S = S1, the process proceeds to “cloth feed 4 process” in step 212, where S = If it is not S1, it progresses to step 213. In this case, since S = 2 and S1 = 3, the process proceeds to step 213. In step 213, if S = 1, the process proceeds to “cloth feed 2 process” in step 214, and if S = 1, the process proceeds to “cloth feed 3 process” in step 215. In this case, since S = 2, the process proceeds to “cloth feed 3 process”.

[Cloth feed 3 processing]
FIG. 22 shows a flowchart of the “cloth feed 3 process” performed in step 215. In this “cloth feed 3 process”, the CPU 7-1 sends the cloth feed frequency C2 (C2 = 2 times) in the spray interval 2 from the pattern data memory SM1, the unit wearing time t6 (t6 = 4.0 seconds), The unit removal time t7 (t7 = 1.0 seconds) is read (steps 701 to 703).

  Then, the count value C of the unit attachment / detachment counter CNT1 is reset to C = 0 (step 704), and the unit attachment / detachment valve V1 is turned on (step 705). Further, the count value C of the unit attaching / detaching counter CNT1 is incremented by 1 to C = 1 (step 706), the count value CT of the total cloth feed counter CNT3 is incremented by 1 and CT = 9 (step 707), and this count is incremented. The count value C of the unit attachment / detachment counter CNT1 and the count value CT of the total cloth feed counter CNT3 are read (steps 708 and 709). Then, after the unit arrival time t6 (t6 = 4.0 seconds) read in step 702 has elapsed (YES in step 710), the unit attaching / detaching valve V1 turned on in step 705 is turned off (step 711).

  At this time, the unit attaching / detaching valve V1 is turned on for t6 = 4.0 seconds, the operating rod 6w1 of the air cylinder 6w in the cleaning device 6 moves forward, and at the same time the cleaning cloth 6i is wound around the winding roll 6m by a predetermined amount. The cleaning cloth 6 i comes into contact with the rubber cylinder 5. During the unit wearing time t6, water is supplied from the cleaning cloth 6i to the surface of the rubber cylinder 5. With this water, the paper dust adhering to the surface of the rubber cylinder 5 is wiped off.

  In step 711, when the unit attachment / detachment valve V1 is turned off, the operation rod 6w1 of the air cylinder 6w in the cleaning device 6 is retracted, and the cleaning cloth 6i is separated from the surface of the rubber cylinder 5. The CPU 7-1 compares the count value C of the unit attachment / detachment counter CNT1 with the cloth feed number C2 (C2 = 2 times) read in step 701 simultaneously with the separation of the cleaning cloth 6i from the surface of the rubber cylinder 5 ( Step 712).

  In this case, since C = 1 and not C = C2, the process returns to step 705 after the elapse of the unit removal time t7 (t7 = 1.0 second) in step 713, and the cleaning cloth 6i with respect to the rubber cylinder 5 is returned. Reattach / remove. Accordingly, if C = C2, that is, if the number of times of attaching / detaching the cleaning cloth 6i to / from the rubber cylinder 5 is two (YES in Step 712), the “cloth feeding 3 process” is ended and the step shown in FIG. Return to 203.

  After completing the “cloth feed 3 process”, the CPU 7-1 increments the count value S of the discharge counter CNT2 by 1 to S = 3 in step 203, and the counted value S (S = 3) of the counted up discharge counter CNT2. ) Is read (step 204). Then, in response to NO in step 205, the process proceeds to step 208, and in response to NO in step 208, the process proceeds to “solvent discharge process” in step 209. Accordingly, the “solvent discharge process” according to the flowchart of FIG. 18 is executed, and the second discharge of the solvent onto the cleaning cloth 6i is performed. When the second discharge of the cleaning liquid is completed, the CPU 7-1 checks the count value S of the discharge counter CNT (step 211 in FIG. 17). In this case, since S = 3 and S1 = 3, the process proceeds to “cloth feed 4 process” in step 212.

[Cloth feed 4 processing]
FIG. 23 shows a flowchart of the “cloth feed 4 process” performed in step 212. In this “cloth feed 4 process”, the CPU 7-1 sends the total cloth feed count CT1 (CT1 = 20 times), the unit arrival time t6 (t6 = 4.0 seconds), and the unit removal time t7 from the pattern data memory SM1. (T7 = 1.0 seconds) is read (steps 801 to 803).

  Then, the unit attaching / detaching valve V1 is turned on (step 804), the count value CT of the total cloth feed counter CNT3 is increased by 1 to CT = 11 (step 805), and the count value CT of the total cloth feed counter CNT3 counted up is set. Read (step 806). Then, after the unit wearing time t6 (t6 = 4.0 seconds) has elapsed (YES in step 807), the unit attaching / detaching valve V1 turned on in step 804 is turned off (step 808).

  In this case, since the count value CT of the total cloth feed counter CNT3 has not reached CT1 in Step 809 (NO in Step 809), the CPU 7-1 removes the unit time t7 in Step 810 (t7 = 1.0 seconds). Then, the process returns to step 804, and the cleaning cloth 6i is repeatedly attached to and detached from the rubber cylinder 5. If CT = CT1 by repeating this attachment / detachment, that is, if the number of attachments / detachments of the cleaning cloth 6i to the rubber cylinder 5 including the number of initial cloth feeds is 20 (YES in Step 809), “cloth feed” 4 process "is completed, and the" cleaning process "shown in FIG.

  In the “cloth feed 4 process”, after the cleaning cloth 6i is brought into contact with the surface of the rubber cylinder 5 for t6 hours and the operation of separating the cleaning cloth 6i for t7 hours is repeated ten times, Wet. Therefore, the ink that cannot be wiped off by the “cloth feed 2 process” and the “cloth feed 3 process” is lifted from the surface of the rubber cylinder 5 by the solvent. In the second half, the dried portion of the cleaning cloth 6i sent out from the supply roll 6j comes into contact with the surface of the rubber cylinder 5, and the ink that floats from the surface of the rubber cylinder 5 is wiped off by the dried cleaning cloth 6i.

  After completing the “cleaning process”, the CPU 7-1 reads the drying time t9 (t9 = 35 seconds) from the pattern data memory SM1 (step 110 shown in FIG. 16). Then, at the same time as sending a high-speed drive command to the motor driver 7-6 (step 111), the timer TM starts counting (step 112). Then, the output from the rotary encoder 7-5 is read, the speed of the printing press is calculated (step 113), and if the printing press reaches a predetermined high speed (drying speed) (YES in step 114), the time is measured in step 112. The check of the time measured by the timer TM that started the operation is repeated (step 115).

  When the time measured by the timer TM reaches the drying time t9 read in step 110 (YES in step 115), a low speed drive command is sent to the motor driver 7-6 (step 116), and the rotation speed of the printing press is reduced to a low speed. (Steps 117 and 118), the cleaning operation (cleaning + drying) in “cleaning pattern 1” is terminated. A cleaning liquid (solvent or water) adheres to the surface of the rubber cylinder 5 after cleaning. After cleaning, the rubber cylinder 5 is rotated at a speed higher than that at the time of cleaning, whereby drying of the cleaning liquid adhering to the surface of the rubber cylinder 5 is promoted, and the surface of the rubber cylinder 5 is dried in a short time.

  In the above description, the cleaning operation in “cleaning pattern 1” has been described. However, the cleaning operations in “cleaning pattern 2”, “cleaning pattern 3”, and “cleaning pattern 4” also follow the flowcharts shown in FIGS. Executed. However, in the “cleaning pattern 2”, the “cloth feeding process 1” is executed after the “solvent discharge process”. FIG. 20 is a flowchart showing the “cloth feed process 1”. In this “cloth feed process 1”, the CPU 7-1 from the pattern data memory SM1, the total cloth feed count CT1, the unit arrival time t6, the unit removal time t7, the liquid permeation standby time t3, and the initial cloth feed time. The unit wearing time t4 and the unit removal time t5 at the time of initial cloth feeding are read (steps 501 to 507). Then, by the processing of Steps 510 to 523 corresponding to Steps 6610 to 623 shown in FIG. 21, as shown in the time chart of FIG. 9, the liquid permeation standby, two initial cloth feeds, two times Ten total cloth feeds including initial cloth feed are performed.

It is a block diagram which shows the outline of the 4-color printing sheet-fed printing press used for implementation of this invention. It is a side view which shows the washing | cleaning apparatus which wash | cleans the surface of a rubber cylinder in this four-color printing sheet-fed printing press. It is front sectional drawing which shows the attachment state of the winding roll in a washing | cleaning apparatus. It is the figure which looked at the axis | shaft 6n in FIG. 3 from the A direction, and the figure which looked at the axis | shaft 6o from the B direction. It is a side view of the washing | cleaning apparatus which shows the state which the outer diameter of the winding roll became large. It is a block diagram of a printing press control apparatus. It is a figure which shows the structure for discharging a solvent and water from the washing nozzle of a washing | cleaning apparatus. It is a time chart in the case of performing a cleaning operation with “cleaning pattern 1”. It is a time chart in the case of performing a cleaning operation with “cleaning pattern 2”. It is a time chart in the case of performing a cleaning operation with “cleaning pattern 3”. It is a time chart in the case of performing a cleaning operation with “cleaning pattern 4”. It is a figure which shows the example of a setting of the cleaning parameter set by "cleaning pattern 1", and a setting range. It is a figure which shows the example of a setting of the cleaning parameter set by "cleaning pattern 2", and a setting range. It is a figure which shows the example of a setting of the cleaning parameter set by "cleaning pattern 3", and a setting range. It is a figure which shows the example of a setting of the washing | cleaning parameter set by "washing pattern 4", and a setting range. It is a flowchart of the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "cleaning process" in the cleaning operation which a printing press control apparatus performs. It is a flowchart which shows the "solvent discharge process" in the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "water discharge process" in the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "cloth feed 1 process" in the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "cloth feed 2 process" in the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "cloth feed 3 process" in the washing | cleaning operation | work which a printing press control apparatus performs. It is a flowchart which shows the "cloth feed 4 process" in the washing | cleaning operation | work which a printing press control apparatus performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Paper feed apparatus, 2 ... Paper discharge apparatus, 3 (3-1 to 3-4) ... Printing unit, 4 (4-1 to 4-4) ... Plate cylinder, 5 (5-1 to 5-4) ... Rubber cylinder, 6 (6-1 to 6-4) ... Cleaning device, 6c ... Drive lever, 6e ... Cleaning unit, 6g ... Cleaning nozzle, 6i ... Cleaning cloth, 6j ... Supply roll, 6m ... Winding roll, 6p ... Lever for cleaning cloth winding, 6q1, 6q2 ... Roller, 6r ... One-way clutch, 6s1, 6s2 ... Spring, 6t ... Lever for constant dimension feeding, 6v ... Pin, 6w ... Air cylinder, 7 ... Printing machine control device 7-1 ... CPU, 7-2 ... RAM, 7-3 ... ROM, 7-4 ... cleaning start button, 7-5 ... rotary encoder, 7-6 ... motor driver, 7-11 ... cleaning pattern data memory, SM1 ... 1st color pattern data memory, SM2 ... 2nd color pattern data memory SM3 ... third color pattern data memory, SM4 ... fourth color pattern data memory, V1 ... unit attachment / detachment valve, V2 ... solvent discharge valve, V3 ... water discharge valve, V4 ... air injection valve, TM ... timer, CNT1 ... unit attachment / detachment counter, CNT2 ... discharge counter, CNT3 ... total cloth feed counter, 8 ... central controller, 9 ... pressure cylinder, 10 ... transfer cylinder, 11 ... solvent tank, 12 ... pressurized air source, 13 ... water tank, 14, 15, 16 ... shunt, VA, VB, VC ... check valve, FG ... current collector.

Claims (5)

A cleaning web supported so as to be movable toward and away from the rotating body;
Cleaning web contact means for bringing the cleaning web into contact with the rotating body;
Cleaning liquid supply means for supplying a cleaning liquid to the upstream side in the moving direction from the contact portion of the cleaning web facing the rotating body;
The cleaning web travels between the time when the cleaning liquid is supplied to the cleaning web and the time when the cleaning web is brought into contact with the rotating body, and the portion of the cleaning web supplied with the cleaning liquid is used as the contact portion with the rotating body. A cleaning device for a printing press comprising a feeding means. The cleaning device for a printing press according to claim 1,
The cleaning apparatus of a printing press, wherein the cleaning web feeding means moves a portion of the cleaning web supplied with the cleaning liquid upward. The cleaning device for a printing press according to claim 1,
The cleaning web contact means includes:
Contact and separation means for bringing the cleaning web into contact with and separating from the rotating body;
The cleaning web feeding means includes:
A cleaning apparatus for a printing press, wherein the cleaning web is caused to travel in conjunction with an approach or separation operation of the cleaning web with respect to the rotating body by the contact / separation means. In the cleaning device for a printing press according to claim 3,
The contacting / separating means includes
Switching means for switching between an operating state in which the cleaning web is brought into contact with the rotating body and a retracted state in which the cleaning web is separated from the rotating body;
A switching signal from the retracted state to the operating state is output to the switching unit, and the switching signal from the operating state to the retracted state is output to the switching unit before the cleaning web contacts the rotating body. And a control means for outputting a switching signal from the retracted state to the operating state to the switching means after the output of the switching signal is repeated at least once and bringing the cleaning web into contact with the rotating body. A cleaning device for a printing press, comprising: In the cleaning device for a printing press according to claim 3,
A winding shaft for winding the cleaning web;
A cleaning machine for a printing machine, comprising: a constant-size feed mechanism that makes the cleaning web feed amount constant by the cleaning web feed means regardless of the winding amount of the cleaning web wound around the take-up shaft. apparatus.

Images