JPH08183168A - Printer - Google Patents

Abstract

PURPOSE: To recover efficiently residual ink and cleaning discharge liquid at the time of replacing ink without damaging a roll peripheral face by using a metal doctor. CONSTITUTION: A printer roll cleaning device 21 is composed of a fixed roll 13 fixed rotatably to a printer, a movable roll 14 driven reciprocatingly toward the fixed roll 13 and a doctor 16, the edge 15 of which is set on the peripheral face of the movable roll 14 and driven reciprocatingly together with the movable roll 14. In the state of rolling contact of the fixed roll 13 with the movable roll 14, friction rolls 17 and 18 by a rolling contact with directly or through an idler roll are installed respectively on a support shaft 19 of the fixed roll and a support shaft 20 of the movable roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing press roll cleaning device.

[0002]

2. Description of the Related Art In a printing machine, a blade is brought into contact with the peripheral surface of a fan roll to form an ink fountain, and a large amount of ink is put therein. Remove the ink remaining in the pot with a spatula, wipe off the ink adhering to the ink fountain, manually rotate the fan ten roll and other rolls, and wash the peripheral surface of the roll with a waste cloth soaked with the cleaning liquid (solvent). are doing. This ink switching operation is inefficient because it is a manual operation, and there is a risk that the fingertips may get caught between the rolls along with the waste cloth during the manual wiping work of the rolls. The ink adhering to the surface of the vase is lost as it is, and since the ink is changed frequently, the worker's hands are contaminated by the adhering ink so that it cannot be washed off. Therefore, the inventor of the present invention automates the work at the time of switching the ink and discharges the cleaning liquid to the fan ten roll, the ink discharge nozzle for discharging the ink, and the ink kneading roll in order to free the worker from the dangerous and dirty work. An automatic cleaning device that attaches the cleaning liquid discharge nozzle to the printing machine, stops the ink discharge nozzle when switching ink, discharges the cleaning liquid from the cleaning liquid discharge nozzle and circulates it throughout the printing machine, and automatically cleans the printing machine roll in a short time. Inventor of the attached printing machine, which is disclosed in Japanese Patent Application No. 6-143542 and Japanese Patent Application Laid-Open No. 6-198225.

[0003]

SUMMARY OF THE INVENTION In this printing machine with an automatic cleaning device, there is no need to remove the residual ink that has been applied to the peripheral surface of the roll when the ink is switched, or to remove the dirty cleaning liquid. It is necessary to contact the doctor with the roll. Since such a doctor is used only when changing the ink, it can be attached to and detached from the roll, and in order to eliminate the impact with the rotating roll and to prevent scratches on the peripheral surface of the doctor, The edge is made of rubber. However, the rubber edge is easily worn, and a gap is created between the roll peripheral surface and the edge, resulting in insufficient collection of residual ink and cleaning waste liquid. As a result, linear contact marks are easily formed in the circumferential direction of the roll peripheral surface.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to use a metal doctor and to efficiently collect the residual ink and the cleaning waste liquid at the time of ink switching, without scratching the peripheral surface of the roll.

[0005]

A printing press roll cleaning device 21 according to the present invention includes a fixed roll 13 rotatably fixed to a printing press, and a movable roll 14 reciprocally driven toward the fixed roll 13. The movable roll 14 is provided with a doctor 16 which is reciprocally driven with the edge 15 set on the peripheral surface of the movable roll 14, and when the fixed roll 13 and the movable roll 14 are in a state of rolling contact with each other, directly or through an idle wheel. The friction wheels 17 and 18 that come into contact with each other are mounted on a support shaft 19 of a fixed roll and a support shaft 20 of a moving roll, respectively.

The printer according to the present invention is provided with a doctor roll 41 which is reciprocally driven toward the fan roll 10, and the rolls 11 and 4 are provided.
1 is an ink reservoir, and an ink discharge opening 42 is arranged above the ink reservoir in a cartridge type ink fountain 43 in parallel with the rolls 11 and 41 to serve as an ink supply source. 41, the doctors 44 and 45 are attached so as to be separated from each other, and the cleaning liquid discharge nozzle 24 is attached to the rolls so that the discharge ports face the rolls. The cleaning liquid discharge nozzle 24 is rotatably attached to the main frame of the printing machine. In the transfer path of the ink to the cylinder 39, a moving roll 14 having a doctor 16 reciprocally driven toward one of the fixed rolls 13 that makes a rolling contact is provided, and a spindle 19 of the fixed roll and a spindle of the moving roll are provided. 20, the fixed roll 13 and the movable roll 14 in the state of contact with each other directly or through the idle wheel It is characterized in that fitted with friction wheel 17, 18 in contact.

Further, the printing machine according to the present invention has the ink discharge opening 5 which is opened and closed by the open / close roll 50 and the cover plate 61.
A cartridge type ink fountain 52 having 1 on the lower side is provided with an opening / closing roll 50 thereof facing the fan ten roll 11 to form an ink supply source, and a doctor 44 is attached to the fan ten roll 11 so as to be detachable. A cleaning liquid discharge nozzle 24 is attached to the ten-roll 11 with its discharge port facing the rotation port, and is rotatably attached to the main frame of the printing machine. Any one of the fixings that makes a rolling contact in the ink transfer path from the ink supply source to the plate cylinder 39. A movable roll 14 having a doctor 16 which is reciprocally driven toward the roll 13 is provided, and a fixed shaft 13 of the fixed roll and a rotary shaft 20 of the movable roll are brought into contact with the fixed roll 13 and the movable roll 14 by rolling contact. It is characterized in that the friction wheels 17 and 18 which are in contact with each other directly or through the idle wheel in the state are attached. Than it is.

The movable roll 14 has a fixed roll 13
The outer diameters of the friction wheels 17 and 18 of both of them that come into direct contact with the fixed roll 13 are the outer diameters of the moving roll 14 and the fixed roll 13 because the friction wheels 17 and 18 directly contact with the fixed roll 13 and rotate. Will be the same as However, due to the design of the printing machine, the outer diameter of the friction wheels 17 and 18 is set to the moving roll 1.
In some cases, the outer diameter of the fixed roll 13 or the outer diameter of the fixed roll 13 may be smaller, and in such a case, an idle wheel is used. In this case, the movable roll 14 and the fixed roll 13 are in contact with each other, and the rotation directions of the two are opposite, so that the number of idle wheels used between the movable roll 14 and the fixed roll 13 is an even number. The idle wheel is attached to a frame (not shown) that pivotally supports the fixed roll 13 or a frame 29 that pivotally supports the movable roll 14. In order to absorb the impact when the movable roll 14 is brought into rolling contact with the rotating fixed roll 13 and to eliminate the slippage between the friction wheels 17 and 18 so that the rotation is reliably transmitted from the fixed roll 13 to the movable roll 14. In addition, the peripheral surfaces of the friction wheels 17 and 18 may be made of a resin composition having rubber elasticity. Further, it is preferable that a metal roll is used for the moving roll 14 and a metal doctor whose edge 15 is made of metal is used for the doctor 16.

Cartridge type ink fountain 52 according to the present invention
As described above, the ink discharge openings 42 and 51 for discharging the ink 53 toward the fan roll 10 of the printing machine are formed straight on the bottom of the ink storage box, and the ink discharge openings 42 and 51 are formed. It is characterized by including a gate member such as an opening / closing roll 50 for opening and closing, and a cover plate 61.

[0010]

First Embodiment The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a printing press roll cleaning device 2 according to the present invention.
1 is a perspective view of FIG. 1, in which a fixed roll 13 is attached to a printing machine main body frame (not shown) via a bearing 22. The moving roll 14 is reciprocally driven by the air cylinder 26 toward the fixed roll 13. A guide rail 25 guides the moving roll 14 toward the fixed roll 13.

That is, the moving roll 14 has the guide rail 2
5 is rotatably attached to a frame 29 of a drainage recovery container 28 that is reciprocally driven toward the fixed roll 13 via a bearing 25. The doctor 16 is attached to the frame 29 of the drainage recovery container 28 in a state where the edge 15 is pressure-bonded to the peripheral surface of the moving roll 14.

FIG. 2 shows a state in which the printing press roll cleaning device 21 shown in FIG. 1 is attached to the main body of the printing press, and the fixed roll 13 constitutes an ink kneading roll. 11 is a fan roll, and 31 and 32 are ink kneading rolls. Reference numeral 33 is a calling roll for calling the ink from the peripheral surface of the fan ten roll to the ink kneading roll 12, and is pivotally supported by a swing arm 34 to reciprocate between the fan ten roll 11 and the ink kneading roll 12. . 35, 36, 37 and 38 are ink form rolls. 39 is a plate cylinder.

The ink fountain 23, like a conventional printing machine,
It is formed by attaching a doctor to the fan-ten roll 11, and at the time of printing, the ink is transferred from the fan-ten roll 11 to the fixed roll 13 via the calling roll 33 and the kneading roll 12, and from the fixed roll 13 to the two kneading rolls 31. Through the ink form rolls 35 and 36
It is distributed to 37 and 38, and is supplied to the plate cylinder 39 from there.

Numeral 24 is a cleaning liquid discharge nozzle, which is reciprocally driven along the rail 40 in the width direction of the printing machine. When the ink is switched, the moving roll 14 is pushed out by the air cylinder 26 and fixed. 13 is in contact with the roller 13, and at that time, the cleaning liquid is supplied from the cleaning liquid discharge nozzle 24 to the ink kneading roll 12, and is transferred to all the rolls of the printing machine, and the cleaning of the printing machine roll is started.

At the time of cleaning the printing press roll, the fixed roll 1
The cleaning liquid transferred from 3 to the moving roll 14 is scraped off by the doctor 16 as drainage and collected in the drainage recovery container 28. Then, the cleaning liquid is again transferred from the fixed roll 13 to the moving roll 14, and the cleaning liquid thus supplied from the cleaning liquid discharge nozzle 24 is circulated through all the rolls of the printing machine and is transferred to the moving roll 14, and by the doctor 16. The liquid is collected in the drainage collection container 28 one after another.

[0016]

[Second Embodiment] FIG. 3 illustrates a printing machine according to an embodiment of the present invention. In an ink fountain 43, an ink ejection opening 42 for ejecting ink 53 is formed straight at the bottom of an ink storage box. The cartridge is formed and replaceable. The printing press roll cleaning device 21 is configured by using the ink kneading roll 13 as a fixed roll.

Doctor rolls 41 are arranged facing each other on the fan roll 11, and an ink reservoir is provided between the rolls. The ink supply source is a cartridge type ink fountain 43 having an ink ejection opening portion 42 that extends straight in the width direction of the printing machine on the lower side, and directs the ink ejection opening portion 42 parallel to the rolls 11 and 41 to form an ink reservoir. It is configured to be replaceable on the upper side of. 5
3 is ink. Reference numeral 61 denotes a lid plate that opens and closes the ink ejection opening portion 42, which is pin-joined to the ink storage box and swingably rotates to automatically adjust the gap of the ink ejection opening portion 42.

The doctor roll 41 is supported by an arm 46 and is reciprocally driven by a servo motor to and from the fan roll 10, and the doctor roll 41 and the fan roll 11 are moved in accordance with the amount of ink adhering to the peripheral surface 11 of the roll. The gauge 47 in between is automatically adjusted. The doctor roll 41 does not rotate during printing, and is rotated while being separated from the fan roll 10 during ink switching.

Fan roll 10 and doctor roll 4
The doctors 44 and 45 are detachably provided on the lower side of the roll 1 and the cleaning liquid discharge nozzles 24 are provided on the upper sides of the rolls 11 and 41, respectively.
The doctors 44 and 45 are attached to a pivot shaft that rotates, and are pressed against the fan roll 10 and the doctor roll 41 when the ink is switched. 60
Is a tray for receiving the drainage of the residual ink and the cleaning liquid scraped off by the doctors 44 and 45.

On the calling roll 33, several divided small width rolls 48 are supported by rails 49 having a rectangular cross section.
A split roll is used which is driven by an air cylinder 54 incorporated in the rail 49 to individually reciprocate between the fan roll 10 and the ink kneading roll 12.

As shown in FIG. 4, each of the divided rolls 33 has a small width roll 48 rotatably supported by a cylindrical guide 56 by a bearing 55, and the cylindrical guide 56 has a width wider than that of a rail 49. A wide rectangular through hole is opened, and a rail 49 is fitted into the rectangular through hole, and in the fitted state, there is a play in the width direction of the rail 49. The cylinder 54 and the spring 57 are built in, and the columnar guide 56 is pushed out in the width direction of the rail 49 by the air cylinder 54 and pushed back by the spring 57. It is reciprocally driven between the fan roll 10 and the ink kneading roll 12 by an air cylinder 54 and a spring 57. The ink distributing roll 12 in accordance with the consumption of ink in the axial direction Juan Ten roll 11
Ink is supplied from. Reference numeral 58 is a pipe for transmitting atmospheric pressure to each air cylinder 54, and an electromagnetic valve (not shown) is provided between the pipe 48 and each air cylinder 54.

[0022]

[Third Embodiment] FIG. 5 illustrates a printing machine according to another embodiment of the present invention. The printing machine roll cleaning device 21 is configured by using an ink kneading roll 13 as a fixed roll. The ink supply source is constituted by a cartridge-type ink fountain 52 having an ink ejection opening portion 51 opened and closed by an opening / closing roll 50 on the lower side, and the opening / closing roll 50 is installed so as to be replaceable toward the fan roll 10. .
In the figure, reference numeral 41 denotes a doctor roll, which does not rotate during printing and is rotationally driven in a state of being separated from the fan ten roll 11 at the time of ink switching, as in the case of the second embodiment. .

Leak-preventing seals (packings) 59 are attached to both edges of the ink discharge opening 51, and the ink discharge opening 51 is completely sealed at the time of replacement. A rubber roll is used as the opening / closing roll 50. The ink discharge opening portion 51 is configured to be opened and closed by driving the open / close roll 50 to move up and down.

On the lower side of the fan roll 10, a doctor 44 is detachably provided.
A cleaning liquid discharge nozzle 24 is provided on the upper side of the. The doctor 44 is attached to a pivot shaft that rotates, and is pressed against the fan roll 10 when the ink is changed. Reference numeral 60 is a tray for receiving the drainage of the residual ink and the cleaning liquid scraped off by the doctor 44. As the calling roll 33, a normal integral type roll is used as in the first embodiment.

[0025]

According to the present invention, the peripheral surfaces of the fixed roll 13 and the moving roll 14 are likely to slip due to the residual ink and the cleaning liquid during the process of collecting the residual ink and the cleaning liquid during the cleaning of the printing press roll. There is a friction wheel 17.1
Since 8 is mounted on the ends of the rolls 13 and 14 to which ink or cleaning liquid does not adhere, slip does not occur between the friction wheels 17 and 18, so the rotation of the support shaft 19 of the fixed roll 13 moves. It is surely transmitted to the spindle 20 of the roll 14. For this reason, the rotation speed of the moving roll 14 does not decrease at the time of cleaning the printing press roll, and the efficiency of collecting the residual ink and the waste liquid of the cleaning liquid by the doctor 16 does not decrease.

Rotation is transmitted from the fixed roll 13 to the moving roll 14 by the friction wheel 17.1 which makes a rolling contact. Therefore, even if the moving roll 14 is brought into a rolling contact with the rotating roll 13 in a high-speed rotating state. However, the impact generated at that time does not cause an unreasonable external force to act on the entire printing machine including those rolls.

Since the doctor 16 is brought into contact with the moving roll 14 which is stationary at the time of printing and separated from the ink transfer path, it can be strongly pressed against the moving roll 14, and when the ink is changed, the movement thereof is prevented. Since the waste ink and the cleaning liquid are collected while being strongly pressure-bonded to the roll 14, the collection efficiency is good.

Since the moving roll 14 has nothing to do with the transfer of ink during printing, and is stationary apart from the transfer path of ink during printing, a metal roll is used for the moving roll 14, and a doctor is used. Even if a metal doctor whose edge 15 is made of metal is used for 16, a roll such as a kneading roll or a form roll unique to the printing machine in the ink transfer path of the printing machine body 30, 31, 32, 35, 36, 37・
There is no damage to 38 and no wear gap between the doctor edge and the moving roll. Therefore, a metal roll is used as the moving roll 14, and the doctor 1
A metal doctor is used for 6, and a doctor 16 is strongly pressed to the moving roll 14 so that the residual ink and the drainage of the cleaning liquid can be efficiently collected in a short time.

Further, in the present invention, since the doctor rolls 41 and 45 and the cleaning liquid discharge nozzles 24 are attached to the fan roll 10 and the doctor roll 41, in which a large amount of residual ink remains attached at the end of printing, the residual ink at the time of ink switching and The recovery efficiency of the waste liquid of the cleaning liquid is further enhanced.

Further, in the present invention, the doctor roll 41 is driven to automatically adjust the gauge 47 with the fan roll 10, and the cover plate 61 and the open / close roll 50 are driven to gauge the ink discharge openings 42 and 51. Since the ink can be automatically adjusted, the gauges are automatically adjusted immediately before the end of printing to suppress the ink supply amount to the roll in the ink transfer path from the ink supply source to the plate cylinder 39 to reduce the residual ink amount. Keep it low and by doing so it will be possible to more efficiently automatically clean press rolls.

Further, according to the present invention, since the ink supply source is constituted by the detachable cartridge type ink fountains 43 and 52, the ink can be switched instantly by replacing the ink fountain, and the printer roll can be automatically operated. In addition, since the cleaning can be performed in a short time, the operating rate of the printing machine is significantly improved, which is a great advantage of the present invention.

It should be noted that although the numbers corresponding to the numbers shown in the drawings are added to the items described in the claims section of this specification, the added numbers are used to understand the contents of this specification. This is for the purpose of facilitating the description, and the added number does not mean that the items described in the appended claims are limited to the items described in the drawings.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a printing press roll cleaning device according to the present invention.

FIG. 2 is a perspective view of a main part of the printing press roll cleaning device according to the present invention in a state of being attached to a printing press main body.

FIG. 3 is a perspective view of a main part of the printing machine according to the present invention.

FIG. 4 is a perspective view of a main part of a split roll used in the printing machine according to the present invention.

FIG. 5 is a side view of a main part of the printing machine according to the present invention.

[Explanation of symbols]

 11 Fan Ten Roll 12 Ink Kneading Roll 13 Fixed Roll 14 Moving Roll 15 Edge 16 Doctor 17 Friction Wheel 18 Friction Wheel 19 Spindle 20 Spindle 21 Cleaning Device 22 Bearing 23 Inkwell 24 Cleaning Fluid Discharge Nozzle 25 Bearing 26 Air Cylinder 27 Guide Rail 28 Container 29 Frame 30 Mixing Roll 31 Mixing Roll 32 Mixing Roll 33 Calling Roll 34 Swing Narm 35 Form Roll 36 Form Roll 37 Form Roll 38 Form Roll 39 Plate Cylinder 40 Rail 41 Doctor Roll 42 Ink Discharging Opening 43 Cartridge Ink Bottle 44 Doctor 45 Doctor 46 Arm 47 Gauge 48 Narrow roll 49 Rail 50 Open / close roll 51 Ink ejection opening 52 Cartridge type ink fountain 3 Ink 54 the air cylinder 55 bearing 56 cylindrical guide 57 spring 58 pipe 59 seal 60 pan 61 the cover plate

Claims (6)

[Claims] 1. A fixed roll 13 rotatably fixed to a printing press, a movable roll 14 reciprocally driven toward the fixed roll 13, and an edge 15 set on the peripheral surface of the movable roll 14 and moved. A friction wheel 17, 18 is provided with a doctor 16 that is reciprocally driven together with the roll 14, and in the state of the fixed roll 13 and the movable roll 14 being in contact with each other directly or through an idle wheel, friction wheels 17 and 18 move with the support shaft 19 of the fixed roll. A printing press roll cleaning device, which is mounted on each of the roll support shafts 20. 2. The printing press roll cleaning apparatus according to claim 1, wherein the friction wheels 17 and 18 have a peripheral surface made of a resin composition having rubber elasticity. The printing press roll cleaning device described. 3. The printing press roll cleaning device according to claim 2, wherein the moving roll 14 is a metal roll, and the edge 15 of the doctor 16 is made of metal. The printing press roll cleaning device described. 4. A doctor roll 41 which is reciprocally driven toward the fan roll 10 is provided, an ink reservoir is provided between the fan roll 11 and the doctor roll 41, and an ink discharge opening is provided above the ink reservoir. A cartridge type ink fountain 43 is arranged parallel to the rolls 11 and 41 to serve as an ink supply source, and the doctor rolls 41 and 45 are detachably attached to the fan roll 10 and the doctor roll 41, respectively. The cleaning liquid discharge nozzle 24 is attached to the discharge roll, and the cleaning liquid discharge nozzle 24 is rotatably attached to the frame of the printing machine main body. One of the fixed rolls 13 makes a rolling contact with the ink transfer path from the ink supply source to the plate cylinder 39. The moving roll 14 provided with the doctor 16 that is reciprocally driven toward
On the support shaft 19 of the fixed roll and the support shaft 20 of the moving roll,
A printing machine, characterized in that friction wheels 17 and 18 are attached to make a fixed contact between the fixed roll 13 and the movable roll 14 in direct contact with each other or through an idler wheel. 5. A cartridge type ink fountain 52 having an ink ejection opening portion 51 opened and closed by an opening and closing roll 50 on the lower side,
To form an ink supply source, attach the doctor 44 to the fan roll 10 so that the doctor 44 can be separated, and attach the cleaning liquid discharge nozzle 24 to the fan roll 11 so that the cleaning liquid discharge nozzle 24 is attached to the fan frame. A movable roll 14 is provided, which is rotatably attached and is attached with a doctor 16 which is reciprocally driven toward any fixed roll 13 which makes a rolling contact in the ink transfer path from the ink supply source to the plate cylinder 39. A friction wheel 17 that directly contacts the support shaft 19 of the fixed roll and the support shaft 20 of the movable roll with the fixed roll 13 and the movable roll 14 in the roller contact state directly or via an idler wheel.
A printing machine having 18 attached. 6. Ink discharge openings 42, 51 for discharging ink 53 toward the fan roll 10 of a printing machine are formed straight at the bottom of the ink storage box,
A cartridge-type ink fountain characterized by comprising gate members 50, 61 for opening and closing the ink discharge openings 42, 51.