JPH10286944A - Cleaning device for rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the cleaning time by switching one cleaning liquid supply means to cleaning of a blade and cleaning of a bank of ink transfer rollers with switching means. SOLUTION: In an initiation state, i.e., a state where a second cleaning nozzle 30 is directed to a blade 21, cleaning liquid 27 is spouted intermittently to the blade 21 from the second cleaning nozzle 30 in predetermined times. In the next place, the rod 34a of a first air cylinder 34 is forwarded so as to direct the second cleaning nozzle 30 in the direction of a distributing roller 13. By keeping this state, cleaning liquid 27 is spouted on the peripheral surface of distributing rollers 15, 16 from cleaning liquid 27 and, at the same time, cleaning liquid 27 is spouted intermittently on the peripheral surface of the distributing roller 13 from the second cleaning nozzle 30. Cleaning liquid 27 spouted on the peripheral surface of the distributing rollers 15, 16 transfers on each rotating roller of an ink device 3 to then be collected in a cleaning bath 20 as a waste liquid of ink. At this time, the blade 21 is cleaned in advance, so that a waste liquid of ink never flows in the downstream side of the blade 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning rollers of an inking unit in a rotary printing press with a cleaning liquid.

[0002]

2. Description of the Related Art In general, in an ink device and a coater device of this type, ink or varnish adhering to each roller is removed at the end of a printing operation or at the time of changing the color of ink in an ink fountain. The surface of each roller is cleaned between printing operations so as to be collected and not to hinder the next printing operation. In this cleaning, the cleaning liquid is jetted to the roller on the upstream side of the ink fountain side, and the ink adhering to the roller is dissolved by the cleaning liquid which is transferred by rotating all the rollers, and the waste liquid of the ink or varnish after the cleaning is moved to the downstream side. Are collected in the cleaning liquid tank by a blade in contact with the roller.

[0003] As a roller cleaning apparatus having a structure in which waste liquid is collected by a blade, Japanese Utility Model Application Laid-Open No. 59-193 has been proposed.
There is one disclosed in Japanese Patent Publication No. 32. What is disclosed herein is provided with a cleaning liquid supply means for supplying a cleaning liquid into the cleaning liquid tank, and during cleaning of the roller, from the cleaning liquid supply means, so that the ink collected in the cleaning liquid tank does not solidify in the cleaning liquid tank. The cleaning liquid is supplied into the cleaning liquid tank. In this type of roller cleaning apparatus, the ink is swirled around the blade edge of the blade due to the viscosity and surface tension of the ink, and is deposited. In such a state, unrecovered ink flows out downstream of the blade, which lowers the cleaning ability and increases the time required for cleaning. In addition, the ink drips on the back surface of the blade and causes printing trouble. Also. Further, if the ink deposited on the blade edge of the blade is left as it is, the ink is dried and the next cleaning cannot be performed. In addition, the roller surface which is in contact with the blade during cleaning may be damaged.
For this reason, another cleaning liquid supply means for supplying a cleaning liquid to the blade edge of the blade during roller cleaning is provided. Further, there is a case where a plurality of cleaning liquid supply units for supplying the cleaning liquid to the roller are provided for the purpose of shortening the cleaning time of the roller.

[0004]

As described above, in the conventional cleaning apparatus described above, the cleaning liquid supply for supplying the cleaning liquid to the inside of the cleaning liquid tank, the blade and the roller in order to shorten the cleaning time and improve the cleaning performance. Means were provided individually. For this reason, there is a problem that a space for installing the plurality of cleaning liquid supply units is required, so that the size of the apparatus is increased and the number of parts is increased, thereby increasing the cost.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and has as its object the following:
It is an object of the present invention to provide a rotary printing press cleaning apparatus that shortens the cleaning time, and also reduces the size and cost of the apparatus.

[0006]

To achieve this object, a cleaning apparatus for a rotary printing press according to the present invention comprises an ink roller comprising a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder. In a cleaning device of a rotary printing press equipped with a transfer roller group and an ink cleaning blade that abuts a tip of the ink roller to scrape ink, a blade jetting position for jetting a cleaning liquid to the ink cleaning blade during cleaning, The cleaning liquid supply means includes a switching means for switching between an ink roller ejection position for injecting the cleaning liquid to the ink transfer roller. Therefore, one cleaning liquid supply unit can be switched between the cleaning of the blade and the cleaning of the ink transfer roller group by the switching unit.

According to a second aspect of the present invention, there is provided an ink transfer roller group including a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder, and the tip of the ink transfer roller is brought into contact with the ink roller to scrape the ink. In a cleaning apparatus of a rotary printing press having an ink cleaning blade and a cleaning liquid tank that collects ink scraped off by the ink cleaning blade, a blade injection position for jetting a cleaning liquid to the ink cleaning blade during cleaning, The cleaning liquid supply means includes a switching means for switching between a cleaning liquid tank injection position for injecting the cleaning liquid into the cleaning liquid tank. Therefore, one cleaning liquid supply means can be switched between cleaning of the blade and cleaning of the cleaning liquid tank by the switching means.

According to a third aspect of the present invention, there is provided an ink transfer roller group including a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder, and abutting the tip of the ink roller to scrape the ink. In a cleaning apparatus of a rotary printing press having an ink cleaning blade and a cleaning liquid tank for collecting ink scraped off by the ink cleaning blade, an ink roller jetting position for jetting a cleaning liquid to the ink transfer roller during cleaning, The cleaning liquid supply means includes a switching means for switching between a cleaning liquid tank injection position for injecting the cleaning liquid into the cleaning liquid tank. Therefore, one cleaning liquid supply unit is switched by the switching unit.
It is possible to switch between cleaning of the ink transfer roller group and cleaning of the cleaning liquid tank.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a state during a blade cleaning operation in a cleaning device for a rotary printing press according to the present invention, FIG. 2 shows a state during a roller cleaning operation, and FIG. 3 is a cleaning operation in a cleaning liquid tank. FIG.
Shows a development view similarly viewed from the front. In these figures, reference numeral 2 denotes a plate cylinder having a plate mounted on its peripheral surface, and both end shafts are rotatably supported between the inker frames 1a and 1b via bearings. An inking device 3 including an ink supply device 4 and an ink roller group 5 is provided between the inker frames 1a and 1b. Ink supply device 4
Is provided with an ink fountain roller 6, a fountain key 7a movably supported on the peripheral surface thereof, a blade 7 supported on the fountain key 7a, and a pair of left and right ink dams 8 to form an ink fountain 9. And the ink 10 is stored.

On the peripheral surface of the plate cylinder 2, a pair of swing rollers 11
A pair of ink application rollers 12 (four in FIG. 1) supported via arms (not shown) are detachably connected to each other. Above the swing roller 11, three kneading rollers 13 are provided. They are provided with their peripheral surfaces in contact with each other. 1
Reference numeral 4 denotes a calling roller that reciprocates between the rollers 6 and 15 while alternately contacting the ink fountain roller 6 and the kneading roller 15, and 16 denotes a kneading roller that contacts the kneading roller 15. These rollers 11, 12, 13, 14, 15, 16
The ink roller group 5 is constituted by the swing roller 17 and the like.

The ink device 3 configured as described above is provided with an ink roller cleaning device indicated by the reference numeral 19 for cleaning the rollers of the ink device 3 as a whole. That is, a cleaning liquid tank 20 formed in a gutter shape is provided near the swing roller 11.
Is formed so as to extend between the inker frames and to be longer than the body length of the swing roller 11. A blade 21 whose front end faces the peripheral surface of the swing roller 11 is fixed to the edge of the cleaning liquid tank 20.
Is formed to be slightly shorter than the entire length of the cleaning liquid tank 20 and slightly longer than the trunk length of the swing roller 11.

The bottom portion 20a of the cleaning liquid tank 20 is formed so as to be inclined downward from one inker frame 1a toward the other inker frame 1b, and a discharge port 20b is formed at the lower inclined end. The discharge pipe 22 is connected to the discharge port 20b. Both sides of the cleaning liquid tank 20 are fixed to a pair of support plates 20d, 20d, and lower ends of the support plates 20d, 20d are connected to the inker frames 1a, 1d.
The shafts 20c, 20c, which are rotatably supported by b, are fixed to one end protruding into the inker frames 1a, 1b. The inker frames 1a of these shafts 20c, 20c
One end of a lever 23 is fixed to an end protruding outside 1b, and the other end of the lever 23 is pivotally attached to a rod 24a of an air cylinder 24 for attaching and detaching a blade.

Above the inking device 3, a plurality of first cleaning nozzles 26 (only one is shown in the drawing) for spraying a cleaning liquid 27 onto the peripheral surface of the kneading roller 15 and the kneading roller 16 at the time of cleaning operation are provided on the axis of the roller. It is erected along the direction. In such a configuration, the rod 24 of the air cylinder 24
When a is advanced, the cleaning liquid tank 20 rotates clockwise in the figure as shown in FIG. 1 through the lever 23 and the shaft 20c,
The tip of the blade 21 contacts the peripheral surface of the swing roller 11. Therefore, the cleaning liquid 27 ejected from the first cleaning nozzle 26 is transferred while cleaning the ink through the rotating rollers, and is scraped by the blade 21 into the cleaning liquid tank 20. When the lot 24a of the air cylinder 24 is retracted, the cleaning liquid tank 20 rotates counterclockwise in the drawing via the lever 23 and the shaft 20c, and the blade 21 separates from the peripheral surface of the swing roller 11.

As shown in FIG. 4, a pipe 31 rotatably supported by the left and right inker frames 1a and 1b extends above the cleaning liquid tank 20 so as to extend along the axial direction of the swing roller 11. I have. In this pipe 31, a plurality of second washing nozzles 30 communicating with the hollow portion of this pipe 31 are arranged in the axial direction of the pipe 31, and at the other end of a hose 32 connected to one end of the pipe 31. Is provided with a cleaning nozzle solenoid valve (not shown). By opening the cleaning nozzle solenoid valve, the cleaning liquid 27 supplied to the pipe 31 via the hose 32 is provided.
Is supplied from the second cleaning nozzle 30. Reference numeral 33 denotes switching means in which the first air cylinder 34 and the second air cylinder 35 are connected so that the rods 34a and 35a project in opposite directions. The tip of the rod 35a is pivotally attached to the inker frame 1b. A lever 36 is provided at the tip of the rod 34a of the first air cylinder 34.
One end of the lever 36 is pivotally mounted, and the other end of the lever 36 is fixedly fastened to the pipe 31 by splitting.

In such a configuration, as an initial state of the second cleaning nozzle 30, as shown in FIG. 1, the rod 34a of the first air cylinder 34 is retracted, and the rod 35a of the second air cylinder 35 is retracted. By the advance, the second cleaning nozzle 30 is directed toward the blade 21. From this initial state, the state in which the rod 35a of the second air cylinder 35 has advanced is maintained, and when the rod 34a of the first air cylinder 34 advances, as shown in FIG. The tube 31 rotates so as to be directed in 13 directions. When the rod 35a of the second air cylinder 35 is retracted and the rod 34a of the first air cylinder 34 is also retracted, the second cleaning nozzle 30 is directed to the inside of the cleaning liquid tank 20, as shown in FIG. The tube 31 rotates.

Next, a description will be given of a cleaning operation of the roller in the cleaning device of the rotary printing press thus configured. By operating an ink discharge button (not shown), the ink application roller 12 is separated from the plate cylinder 2 in advance, and each roller of the inking device 3 is rotated at a low speed. Pot key motor (not shown)
Is driven to move all the urn keys 7a, thereby fully opening the interval between the blade 7 and the urn roller 6. The urn roller motor (not shown) is driven to set the urn roller 6 to the maximum rotation amount, and the calling drive device (not shown) is turned on to turn the calling roller 14 between the urn roller 6 and the kneading roller 15. By reciprocating, the ink 10 of the ink fountain 9 transferred to the fountain roller 6 is transported by the recall roller 14 to the kneading roller 15 side.

In the initial state shown in FIG. 1, that is, in a state where the second cleaning nozzle 30 is directed to the blade 21,
The cleaning liquid 27 is intermittently jetted from the second cleaning nozzle 30 to the blade 21 a predetermined number of times. Next, the rod 34a of the first air cylinder 34 is advanced, and the second cleaning nozzle 3
0 is directed to the kneading roller 13 as shown in FIG. In such a state, the cleaning liquid 27 is sprayed from the first cleaning nozzle 26 onto the peripheral surfaces of the kneading rollers 15 and 16, and at the same time, the cleaning liquid 27 is intermittently supplied from the second cleaning nozzle 30 to the peripheral surface of the kneading rollers 13. Spray. Cleaning liquid 27 sprayed on the peripheral surface of kneading roller 15 and kneading roller 16
Is transferred to each of the rotating rollers of the inking unit 3, and is collected by the cleaning liquid tank 20 as waste ink by the blade 21.

At this time, the blade 21 is
Since the cutting edge is cleaned by the cleaning nozzle 30 of
Ink does not accumulate on the blade edge and waste liquid of the ink does not flow downstream of the blade 21, and the cleaning liquid tank 20
And the cleaning time of the roller is shortened.
Further, the cleaning liquid 27 is jetted from the second cleaning nozzle 30 to the ink roller group 5 separately from the first cleaning nozzle 26, so that the cleaning speed of the roller is compared with the cleaning speed of the roller using only the first cleaning nozzle 26. Since the cleaning speed is increased, the cleaning time of the ink roller group 5 is reduced.

When the cleaning liquid 27 is intermittently ejected from the second cleaning nozzle 30 a predetermined number of times onto the peripheral surface of the kneading roller 13,
The rod 35a of the second air cylinder 35 is retracted, the second cleaning nozzle 30 is directed inside the cleaning liquid tank 20, and the cleaning liquid 27 is jetted, as shown in FIG. When the cleaning liquid 27 is sprayed into the cleaning liquid tank 20, the waste liquid of the ink in the cleaning liquid tank 20 is discharged from the discharge port 20b to the discharge pipe 22 by the cleaning liquid 27, so that cleaning of the cleaning liquid tank 20 becomes unnecessary. When the cleaning liquid 27 is injected into the cleaning liquid tank 20 intermittently a predetermined number of times from the second cleaning nozzle 30, the rods 34a, 35 of the first and second air cylinders 34, 35 are discharged.
a advances, and the second washing nozzle 30 is directed toward the kneading roller 13 as shown in FIG. Thereafter, the second cleaning nozzle 30 is directed in the direction of the blade 21 and then in the cleaning liquid tank 20, and the kneading rollers 13 and
The cleaning liquid 27 is injected in the order of the blade 21 and the cleaning liquid tank 20, and this injection operation is repeated.

When the cleaning of the ink roller group 5 is completed after a lapse of a predetermined time, the ejection of the first cleaning nozzle 26 is stopped. At the same time, the rod 34a of the first air cylinder 34 retreats and the rod 35a of the second air cylinder 35
a advances, and the second cleaning nozzle 30 is directed toward the blade 21. The cleaning liquid 27 is sprayed from the second cleaning nozzle 30 to the blade 21 to wash the ink deposited on the blade edge of the blade 21, so that the ink remaining on the blade edge of the blade 21 is dried at the time of the next roller cleaning, and the next ink is dried. There will be no loss of cleaning.

Next, the rod 24a of the air cylinder 24
Retreats, the cleaning liquid tank 20 rotates, and the blade 21 separates from the peripheral surface of the swing roller 11. At the same time, the rod 35a of the second air cylinder 35 is retracted, the second cleaning nozzle 30 is directed in the cleaning liquid tank 20, and the cleaning liquid 27 is jetted into the cleaning liquid tank 20, so that the ink in the cleaning liquid tank 20 is removed. The waste liquid is discharged from the discharge port 20b to the discharge pipe 22 by the cleaning liquid 27. When the cleaning is completed, the rod 35a of the second air cylinder 35 advances, and the second cleaning nozzle 30 returns to the initial state of pointing in the direction of the blade 21.

As described above, one second cleaning nozzle 30
As a result, the blade 21, the roller, and the cleaning liquid tank 20 are cleaned, so that the space in the apparatus can be minimized. As a result, the size of the apparatus can be reduced, and the number of parts can be greatly reduced, so that the cost can be reduced. The burden of mounting work is reduced, and the electric circuit is simplified. Also,
To switch the second cleaning nozzle 26 to the injection position in three directions, two air cylinders 34 and 35 are connected in series,
Rods 34a, 35a of these air cylinders 34, 35
Only need to be moved forward and backward, and a sensor for detecting the position of the second cleaning nozzle 30 in three directions and a control device for controlling the same are not required, so that not only the structure is simplified, but also the operation is simplified. Therefore, the switching time is reduced.

In this embodiment, the blade 21 is washed only at the beginning and the end of the washing operation.
The cleaning of the roller may be temporarily stopped during the cleaning of the roller, and the second cleaning nozzle 30 may be directed to the blade 21. Similarly, cleaning of the cleaning liquid tank 20 may be performed during cleaning of the roller. Also, blade 2
Although the ink scraped off by 1 is collected in the cleaning liquid tank 20, a cleaning cloth may be attached to the blade 21 instead of the cleaning liquid tank 20 to collect the ink.

Although the second cleaning nozzle 30 is directed in three directions, two directions may be appropriately selected from the three directions as needed.
There is no need to connect the two air cylinders 34, 35,
The second cleaning nozzle 26 is connected to two by one air cylinder.
What is necessary is just to direct a direction. Also, the second cleaning nozzle 30
To direct the air in three directions, two air cylinders 34,
Although 35 was used, the present invention is not limited to this. By rotating the tube 31 with a step motor and controlling the number of steps of the motor by the control unit, the second cleaning nozzle 30 was directed in three directions. Various design changes are possible.

[0025]

As described above, according to the present invention, the cleaning of the blade and the ink transfer roller can be performed by one cleaning liquid supply means, so that the space for installing the cleaning liquid supply means can be minimized. Therefore, the size of the apparatus can be reduced. In addition, the number of parts can be greatly reduced, so that the cost is reduced.

According to the second aspect of the present invention, since the cleaning of the blade and the cleaning of the cleaning liquid tank can be performed by one cleaning liquid supply means, the space for installing the cleaning liquid supply means can be minimized. The size of the device can be reduced. In addition, the number of parts can be greatly reduced, so that the cost is reduced.

According to the third aspect of the present invention, the cleaning of the ink transfer roller and the cleaning of the cleaning liquid tank can be performed by one cleaning liquid supply means, so that the space for installing the cleaning liquid supply means can be minimized. Therefore, the size of the apparatus can be reduced. Also, since the number of parts can be greatly reduced,
Cost is reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a state during a blade cleaning operation in a cleaning device for a rotary printing press according to the present invention.

FIG. 2 is a side view showing a state during a cleaning operation of a roller in the cleaning device of the rotary printing press according to the present invention.

FIG. 3 is a side view showing a state during a cleaning operation in a cleaning liquid tank in the cleaning device of the rotary printing press according to the present invention.

FIG. 4 is a development view of the cleaning device of the rotary printing press according to the present invention as viewed from the front.

[Explanation of symbols]

2 ... plate cylinder, 3 ... ink device, 4 ... ink supply device, 11
... Swing roller, 19 ... Ink roller cleaning device, 20 ... Cleaning liquid tank, 21 ... Blade, 26 ... First cleaning nozzle, 2
7 cleaning liquid, 30 second cleaning nozzle, 33 switching means.

Claims (3)

[Claims] 1. An ink transfer roller group comprising a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder, and an ink cleaning blade for abutting a tip of the ink roller on the ink roller to scrape off the ink. A washing device for a rotary printing press, comprising a switching means for switching between a blade ejection position for ejecting the washing solution to the ink washing blade during washing and an ink roller ejection position for ejecting the washing solution to the ink transfer roller. A cleaning device for a rotary printing press, comprising a supply unit. 2. An ink transfer roller group comprising a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder, an ink cleaning blade for abutting the tip of the ink roller to scrape off the ink, In a cleaning device of a rotary printing press having a cleaning liquid tank for collecting ink scraped off by an ink cleaning blade, a blade injection position for jetting a cleaning liquid to the ink cleaning blade during cleaning, and the cleaning liquid into the cleaning liquid tank. A cleaning device for a rotary printing press, comprising: a cleaning liquid supply unit provided with a switching unit for switching between a cleaning liquid tank injection position for jetting. 3. An ink transfer roller group comprising a plurality of ink rollers for receiving ink from an ink fountain and sending ink to a plate cylinder, an ink cleaning blade for abutting the tip of the ink roller to scrape off the ink, In a cleaning device of a rotary printing press having a cleaning liquid tank for collecting ink scraped off by an ink cleaning blade, an ink roller jetting position for jetting a cleaning liquid to the ink transfer roller during cleaning, and a cleaning liquid in the cleaning liquid tank. A cleaning device for a rotary printing press, comprising: a cleaning liquid supply unit having a switching unit for switching between a cleaning liquid tank injection position for jetting a cleaning liquid.