JP2003127336A - Inking unit of intaglio printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten cleaning time and reduce a load on an operator, by enabling automatic cleaning of an inking unit. SOLUTION: This inking unit is equipped with: a fountain roller 2 having a metal surface, an ink roller group which includes a ductor roller 3 having a metal surface; a cleaning roller 13 with a surface of an elastic body, which is brought into contact with the fountain roller 2 and a roller of the ink roller group; and speed adjusting means such as a fountain roller driving motor 8, an inker driving motor 9 and clutches 11a and 11b, which make a circumferential speed of the fountain roller 2 equal to that of the roller of the ink roller group at a cleaning time when the cleaning roller 13 is brought into contact with both the fountain roller 2 and the roller of the ink roller group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inking device for an intaglio printing machine.

[0002]

2. Description of the Related Art Generally, an inking device for an intaglio printing press transfers ink accumulated in an ink fountain to a fountain roller, a calling roller, a kneading roller, a shaking roller, and a forming roller, and the ink is wound around the peripheral surface of the plate cylinder. Ink is supplied to the plate and printing (pattern) is performed on the paper by a printing unit (not shown).

Regarding the peripheral speed at the time of printing for each roller of the inking device, the peripheral speed of the downstream side ink roller group including the calling roller is conventionally the same peripheral speed in order to uniformly transfer the ink to the plate cylinder. I'm fast. However, if the peripheral speed of the pot roller is the same as the above peripheral speed, the ink cannot be completely consumed in the roller on the downstream side, and ink accumulates in the roller on the downstream side every moment, which leads to stains on the printed matter. It is rotated at a lower peripheral speed than the roller on the side (a peripheral speed at which ink can be consumed).

[0004]

However, in the conventional inking device as described above, the peripheral speeds of the pot roller and the downstream roller are different when cleaning each roller during cleaning. In the case of cleaning the rollers, the calling roller, which is a roller on the downstream side, is separated (disengaged) from the pot roller to perform the washing, and the pot roller is cleaned by the operator.

Therefore, the cleaning work requires a great deal of time, and the operator's burden is heavy. Therefore, there has been a strong demand for automation of a series of cleaning works. As a solution to this problem, when the cleaning is performed, the calling roller is connected to the pot roller and the kneading roller, or the pot roller and the calling roller are connected by another roller, so that the pot roller is also washed at the same time as other ink rollers. Although the technology was proposed for an offset printing machine, in the inking device of the intaglio printing machine newly developed by the applicant, the calling roller and the fountain roller are used even during printing in order to prevent abrasion due to the speed difference between the fountain roller and other rollers. The contact rollers are opposed to each other with a slight gap, rather than being completely in contact with each other, and the calling roller has a rough surface so that the ink can be transferred even in this state. Since the calling roller needs to be made of metal from the viewpoint of its processing accuracy and durability, it may be damaged even if it is washed even if it is brought into contact with the metal calling roller and the metal pot roller. No, again
Even if the pot roller and calling roller are connected via another roller, the rough surface of the calling roller does not spread the cleaning liquid over the entire surface, and there is the problem that the ink stains cannot be cleaned sufficiently, so it cannot be used as is. It was

Therefore, an object of the present invention is to make it possible to automatically clean the inking unit of the intaglio printing machine, to shorten the cleaning time and reduce the burden on the operator.

[0007]

In order to achieve the above-mentioned object, an inking device for an intaglio printing machine according to the present invention comprises a fountain roller having a metal surface and an adjoining metal surface which is not in direct contact with the fountain roller during printing. A calling roller, an ink roller group adjacent to the calling roller, a cleaning roller having an elastic body surface that comes into contact with the fountain roller and the roller of the ink roller group during cleaning, and the cleaning roller of the fountain roller and the ink roller group. And a speed adjusting means for making the peripheral speeds of the fountain roller, the calling roller and the rollers of the same ink roller group substantially the same when they are in contact with the roller. Further, it is preferable that a removable doctor for collecting the ink and the cleaning liquid is provided on the fountain roller because the doctor can be used for cleaning the inside of the fountain.

[Operation] According to the above construction, at the time of cleaning, the pot roller, the calling roller and the ink roller group adjacent thereto are rotationally driven at the same peripheral speed via the cleaning roller, and the pot roller and the ink roller group are driven. It is automatically cleaned with.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An inking device for an intaglio printing machine according to the present invention will be described in detail with reference to Examples.

[Embodiment] FIG. 1 is an explanatory view showing a roller arrangement of an inking device, and FIG. 2 is a schematic explanatory view of a speed adjusting means.

As shown in the drawing, the ink accumulated in the ink fountain 1 is transferred to the fountain roller 2 → calling roller 3 → kneading roller 4 → shaking roller 5 → applying roller 6 and wound on the peripheral surface of the plate cylinder 7. Ink is supplied to the plate.

The pot roller 2 having a metal surface
Is driven by a pot roller drive motor 8 capable of switching between two speeds (peripheral speed) during printing and during cleaning. Also,
The calling roller 3 and the ink roller group are composed of an inker driving motor 9 and a main body driving motor 10 connected to the swing roller 5.
By means of the clutches 11A and 11B, the drive motor 10 is selectively driven during printing, and the in-car drive motor 9 is selectively driven during cleaning. Here, the cleaning speed of the pot roller drive motor 8 and the speed of the inker drive motor 9 are set to be the same.

The calling roller 3 having a metal surface and having a rough surface is brought into contact with (separated from) the pot roller 2 as shown in the left-right direction in FIG. 1 (see the arrow in the figure). It is supported freely, and at the time of printing, by using a method called a kiss touch, in a contact (wearing) state in which it is separated from the pot roller 2 to some extent, the pot roller 2
Printing is performed by transferring only the ink film adhering to the roller to the roller by utilizing the rough surface, and at the time of cleaning, the cleaning operation is performed in a state of being separated (removed) from the pot roller. The calling roller 3 is always in rolling contact with the kneading roller 4.

A cleaning roller 13 having an elastic surface such as a rubber layer is constantly brought into rolling contact with the kneading roller 4 via a lever 14, and at the time of cleaning, the lever 14 is rotated by an extension operation of an actuator 15. The kneading roller 4 and the pot roller 2 are also brought into contact with each other.

Further, a doctor 16 for collecting the ink / cleaning liquid is provided on the pot roller 2 so as to be detachable by the expansion / contraction operation of an actuator 17.

Further, a nozzle 18 communicating with a cleaning liquid supply source (not shown) is arranged above the ink roller group below the kneading roller 4, and at the time of cleaning, it is directed from the numerous nozzle holes of the nozzle 18 toward the ink roller group. The cleaning liquid is spouted.

With this configuration, when printing,
The cleaning roller 13 is separated from the pot roller 2 by the contraction operation of the actuator 15, and the actuator 1
Due to the contracting operation of 7, the doctor 16 is separated from the pot roller 2.

In this state, the pot roller drive motor 8 is rotated at the set speed during printing, and the clutch 11A is turned on.
While FFing, the clutch 11B is turned on and the calling roller 3
Also, the ink roller group including the kneading roller 4 and below is rotationally driven by the machine drive motor 10.

As a result, the fountain roller 2 is rotated at a predetermined peripheral speed, and at the same time, the ink roller group including the calling roller 3 and the kneading roller 4 is rotated at a high peripheral speed different from that of the fountain roller 2, and the ink in the ink fountain 1 is rotated. Are satisfactorily supplied to the plate cylinder 7 as usual.

On the other hand, at the time of cleaning, the calling roller 3 is separated (disengaged) from the pot roller 2 to the right in FIG. 1 and is constantly in rolling contact with the kneading roller 4, and the clutch 11B is turned off.
On the other hand, the clutch 11A is turned on to rotate the inking roller 3 and the ink roller group below the kneading roller 4 by the inker driving motor 9, and further, the pot roller driving motor 8 is switched to the set speed for cleaning and rotated.

In this state, the actuator 15 is extended so that the cleaning roller 13 is brought into contact with the pot roller 2 together with the kneading roller 4, and at the same time, the cleaning liquid is ejected from the numerous nozzle holes of the nozzle 18 toward the ink roller group. After that, the doctor 16 is attached to the pot roller 2 by the extension operation of the actuator 17.

As a result, the pot roller 2 and the ink roller group including the calling roller 3 and the kneading roller 4 and below are rotated at the same peripheral speed, and the ink transferred to the ink roller group is melted with the cleaning liquid and washed with the cleaning liquid. Roller 13
It is returned to the pot roller 2 via and is collected in the doctor 16 from there. Further, even if the calling roller 3 has a rough surface, the cleaning roller 13 connects the fountain roller 2 and the ink roller group, so that the cleaning liquid can surely reach the fountain roller 2 and be cleaned.

As described above, in this embodiment, since the doctor 16 is attached to the fountain roller 2, when the main body of the ink fountain 1 is tilted down for cleaning, excess cleaning liquid remaining in the ink fountain 1 is collected in the doctor 16. The number of parts can be reduced because there is no need to use an ink pan or the like.
Needless to say, instead of the pot roller 2, the doctor 16 may be attached to a gold roller such as the calling roller 3 and the swing roller 5.

[Other Embodiments] FIG. 3 shows a modification of the speed adjusting means such as the pot roller drive motor 8 described above.

In FIG. 9A, the inker drive motor 9 in the previous embodiment is eliminated, and at the time of printing, the clutch 11C on the newly provided pot roller drive motor 8 side is turned off and the clutch on the machine drive motor 10 side is turned off. 11B is turned on, and the fountain roller 2 is rotated by the fountain roller drive motor 8 at the set speed at the time of printing, and the ink roller group including the calling roller 3 and the kneading roller 4 and below is rotated by the machine drive motor 10. On the other hand, at the time of cleaning, the clutch 11B on the machine drive motor 10 side is turned off and the clutch 11C on the fountain roller drive motor 8 side is turned on to make the ink roller group including the calling roller 3 and the kneading roller 4 together with the fountain roller 2 a fountain roller drive motor. 8 is an example of rotating at the set speed for cleaning. With this, the same operation and effect as those of the previous embodiment can be obtained.

In FIG. 6B, the pot roller drive motor 8 in the previous embodiment is eliminated, and at the time of printing, the clutch 11A on the inker drive motor 9 side is turned off and the clutch 11B on the machine drive motor 10 side is turned on. Further, a transmission (a mechanical or electrical type can be used) 12 newly provided on the side of the pot roller 2 is actuated to the deceleration side to bring the pot roller 2 into an ink roller group including a calling roller 3 and a kneading roller 4 or less. At the same time, it is rotated by the machine drive motor 10.
On the other hand, at the time of cleaning, the clutch 1 on the drive motor 10 side of the machine
1B is turned off, the clutch 11A on the side of the inker driving motor 9 is turned on, and further, the pot roller 2 is rotated by the inker driving motor 9 together with the calling roller 3 and the ink roller group below the kneading roller 4 without operating the transmission 12. This is an example of making it possible. With this, the same operation and effect as those of the previous embodiment can be obtained.

In FIG. 6C, the inker drive motor 9 in the previous embodiment is eliminated, and at the time of printing, the clutch 11C on the side of the newly installed pot roller drive motor 8 is turned off and the clutch on the drive motor 10 side of this machine is turned off. Turn on 11B,
Further, the transmission 12 newly provided on the side of the pot roller 2 is actuated to the speed increasing side to drive the pot roller 2 to the pot roller drive motor 8 (this motor is different in speed between printing and washing unlike the previous embodiment). Is not switchable in two ways), and the ink roller group including the calling roller 3 and the kneading roller 4 and below is rotated by the drive motor 10 of the machine. On the other hand, during cleaning, the clutch 11B on the drive motor 10 side is turned off.
And the clutch 11C on the side of the pot roller drive motor 8
Is turned on, and the transmission roller 12 is not operated, and the ink roller group including the calling roller 3 and the kneading roller 4 is rotated together with the fountain roller 2 by the fountain roller drive motor 8. With this, the same operation and effect as those of the previous embodiment can be obtained.

FIG. 4 shows a modified example of the attachment / detachment mechanism of the cleaning roller 13 described above. This is the cleaning roller 13
Is an example in which the actuator is directly moved from the lower position (disengaged position) to the upper position (attached position) by an actuator or the like (not shown). With this, the same operation and effect as those of the previous embodiment can be obtained. Alternatively, the cleaning roller 13 may be received by an eccentric bearing, and the cleaning roller 13 may be attached and detached by operating the eccentric bearing with an actuator or the like.

[0029]

As described above, according to the present invention, a fountain roller having a metal surface, a call roller having a metal surface which is adjacent to the fountain roller without being in direct contact with the fountain roller at the time of printing, and an ink roller group which is adjacent to the call roller. A cleaning roller on the surface of the elastic body that comes into contact with the fountain roller and the roller of the ink roller group during cleaning, and the cleaning roller is called the fountain roller when the cleaning roller is in contact with the fountain roller and the roller of the ink roller group. Since the roller and the speed adjusting means for making the peripheral speed of the ink roller group substantially equal to each other are provided, at the time of cleaning, the pot roller and the ink roller group including the calling roller are at the same peripheral speed via the cleaning roller. It is driven to rotate and the pot roller is automatically cleaned together with the ink roller group including the calling roller, which shortens the cleaning time and the burden on the operator.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a roller arrangement of an inking device showing an embodiment of the present invention.

FIG. 2 is a schematic explanatory view of a speed adjusting means.

FIG. 3 is a schematic explanatory view showing a modification of the speed adjusting means.

FIG. 4 is a schematic explanatory view showing a modified example of a cleaning roller attaching / detaching mechanism.

[Explanation of symbols]

1 ink fountain 2 tub roller 3 calling roller 4 kneading roller 5 swing rollers 6 wearing rollers 7 plate body 8 Fountain roller drive motor 9 Inker drive motor 10 This unit drive motor 11A, 11B, 11C clutch 12 gearbox 13 Cleaning roller 16 Doctor for collecting ink and cleaning liquid 18 nozzles

Continued front page    (72) Inventor Hiromi Kamoda             210 Kiriga product, Sekijuku-cho, Higashi-Katsushika-gun, Chiba Prefecture             Ceremony Company Komori Corporation Sekijuku Plant             Within (72) Inventor Kenji Hayashi             210 Kiriga product, Sekijuku-cho, Higashi-Katsushika-gun, Chiba Prefecture             Ceremony Company Komori Corporation Sekijuku Plant             Within F-term (reference) 2C250 DB01 DC01 DC04 DC05 DC10                       EA26 EA47 FA13 FB02

Claims (2)

[Claims] 1. A fountain roller having a metal surface, a calling roller having a metal surface adjacent to the fountain roller in a state of not directly contacting the printing roller at the time of printing, an ink roller group adjacent to the calling roller, the fountain roller and the ink roller group at the time of cleaning. Of the elastic surface contacting the roller of the roller and the circumference of the pot roller, the calling roller and the roller of the ink roller group when the washing roller is in contact with the fountain roller and the roller of the ink roller group. An inking device for an intaglio printing machine, comprising: speed adjusting means for making speeds substantially the same. 2. The inking device for an intaglio printing machine according to claim 1, wherein the fountain roller is provided with a detachable doctor for collecting ink and cleaning liquid.