JPH10217434A - Inking device for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically clean a longer fountain roller than a kneading roller without residue to clean in an inking device of an ink fountain type. SOLUTION: This device comprises a bridge roller 17 for simultaneously bringing a calling roller 8 into contact with a fountain roller 7 of the state in contact with a kneading roller 9 at the time of cleaning. In this case, the roller 7 is coupled to the roller 9 via a bridge roller 17 and the roller 8 to supply cleanser while rotating these rollers, thereby automatically cleaning all the rollers. Further, at the time of cleaning, the roller 17 is oscillated in an axial direction to bring the roller 17 into contact with both ends of the fountain roller to satisfactorily clean over the entire length of the fountain roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inking device provided in an offset printing machine or letterpress printing machine, and more particularly to an inking device capable of automatically cleaning rollers.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a printing unit of an offset printing press or letterpress printing press has a blanket cylinder 2 for transferring an ink image to a paper 1 to be printed, and an ink image on the blanket cylinder 2. And an ink device 4 for applying ink to the plate cylinder 3. The ink device 4 includes an ink fountain 6 for storing ink and an ink fountain 6 for removing ink from the ink fountain 6. Pot roller 7,
A call roller 8 for taking out ink from the fountain roller 7 and applying the ink to a kneading roller described later, and kneading the ink applied from the call roller 8 and transferring the ink to the plate cylinder 10
It is provided with up to 20 kneading rollers 9 and the like. Here, the call roller 8 is configured to move to a position in contact with the pot roller 7 and to move away from the pot roller 7 to a position in contact with one of the kneading rollers 9 (indicated by reference numeral 9a). The ink is taken out of the jar roller 7 in contact with the roller 7, and then moved to a position where it comes into contact with the kneading roller 9a to apply the ink to the kneading roller 9a.

In the inking unit 4, when the printing operation is completed and the printing items are to be changed, the ink adhered to the rollers 7, 8, and 9 of the inking unit 4 must be washed. As shown in FIG. 6, all of the kneading rollers 9 are rotated while applying the cleaning liquid 11 from one of the kneading rollers 9 (for example, 9 a) from the cleaning liquid nozzle 10, and the cleaning liquid collection doctor 12 moves the arrow 13 from the outer peripheral surface of the kneading roller 9. As shown in the figure, a method of scraping off the cleaning liquid and the ink is employed. Since a large number of kneading rollers 9 are in contact with adjacent rollers, if the washing liquid is applied to one location, the washing liquid spreads over all the rollers, and one kneading roller 9
A large number of kneading rollers 9 can be automatically cleaned by scraping off the cleaning liquid and the ink with the cleaning liquid recovery doctor 12 from. Also, at this time, by bringing the call roller 8 into contact with the kneading roller 9, the call roller 8
Automatic cleaning is also possible. On the other hand, since the pot roller 7 is located at a position away from the call roller 8 and the kneading roller 9, it cannot be automatically washed together with the kneading roller 9 and the kneading roller 8, and therefore, has been manually washed.

[0004]

As described above, conventionally, the jar roller 7 has to be manually cleaned, which not only imposes a heavy burden on the operator, but also has a problem in terms of hygiene due to the use of the cleaning liquid. Was. Further, since a thick ink film is left on the fountain roller 7, the cleaning is very heavy and causes a reduction in efficiency.

In order to automatically clean the pot roller 7 together with the call roller 8 and the kneading roller 9, as shown in FIG. 7 or 8, at the time of washing, the pot roller 7 and the call roller 8 are connected to the bridge roller 14A or 14B. It is conceivable to arrange them so that they are in contact with each other and to bridge them. If the bridge roller 14A or 14B is provided and the pot roller 7 is connected to the kneading roller 9, the cleaning liquid can be supplied to and recovered from the pot roller 7, and the automatic cleaning of all the rollers including the pot roller 7 can be performed. Becomes possible. However, the pot roller 7 is longer than the call roller 8 and the kneading roller 9,
As shown in FIG. 7, when the bridge roller 14A having the same length as the pot roller 7 is used, only the range of the surface length of the call roller 8 can be washed (the washing liquid cannot be collected).
Therefore, at both ends of the bridge roller 14A and the pot roller 7,
As shown in FIG. 8, when the bridge roller 14B having the same length as the call roller 8 is used, the fountain roller 7 is formed.
At both ends of the unwashed area 1 where ink, washing liquid, etc. remain.
It has been found that the problem of occurrence of 5 occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has an object to provide an inking device capable of automatically cleaning a large number of rollers including a pot roller without leaving unwashed portions at both ends of the pot roller. With the goal.

[0007]

According to the present invention, a bridge roller for connecting a pot roller to a kneading roller is provided for automatic cleaning of the pot roller, and the bridge roller is oscillated (reciprocated) in the axial direction. This makes it possible to wash over the entire width of the jar roller.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments of the present invention shown in the drawings. FIG. 1 is a schematic side view showing an inking unit 4A according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view showing the inking unit 4A in a state at the time of cleaning. 1 and 2, an inking device 4A includes an ink fountain 6 for storing ink, a fountain roller 7 for taking out ink from the ink fountain 6, and an ink taken out from the fountain roller 7 and applied to a kneading roller described later. Roller 8 for kneading, and 10 to 20 kneading rollers 9 for kneading the ink applied from the calling roller 8 and transferring the ink to the plate cylinder, and the like.
And moves away from the pot roller 7 to a position in contact with one of the kneading rollers 9 (indicated by reference numeral 9a). Here, the surface lengths of the call roller 8 and the kneading roller 9 are set to be equal to each other.
On the other hand, the surface length of the pot roller 7 is set to be longer than that of the call roller 8 and the kneading roller 9 so that ink can be applied to the call roller 8 over its entire length.

The inking device 4A is further provided with a bridge roller 17. The bridge roller 17 has a surface length substantially equal to the surface length of the call roller 8.
It is rotatably held by a supporting means (not shown). The supporting means that supports the bridge roller 17 is configured to move the bridge roller 17 into a retracted position (a position where it is not in contact with another roller) shown by a solid line in FIG. (A position at which the call roller 8 and the pot roller 7 that are in contact with each other at the same time are brought into contact with an appropriate surface pressure). Thus, by setting the bridge roller 17 to the cleaning position, the pot roller 7
The kneading roller 9 and the kneading roller 9 are connected to each other via the bridge roller 17 and the call roller 8, and the bridge roller 17 is set to the retracted position, whereby the pot roller 7 and the kneading roller 9 can be separated. Here, the bridge roller 17
As a support means having a function of supporting and moving the
Any known one can be used. For example, a structure in which both ends of the bridge roller 17 are supported by a rotation arm and the rotation arm is rotated by a driving mechanism such as a cylinder mechanism, or a bridge roller For example, a member in which a member supporting both ends is movably held by a linear guide and the member is reciprocated by a driving mechanism such as a cylinder mechanism can be exemplified.

A means (not shown) for swinging (reciprocating) the bridge roller 17 in the axial direction is connected to the bridge roller 17 described above. Bridge roller 17
As shown in FIG. 3 (a), the swing range from the position where the left end of the bridge roller 17 coincides with the left end of the pot roller 7 is
As shown in FIG. 3B, the right end of the bridge roller 17 is set to a position where it coincides with the right end of the pot roller 7. Here, as the means for swinging the bridge roller 17 in the axial direction, any known means can be used. The means is provided separately from the bridge roller 17 and is configured to swing the bridge roller 17 together with the axis. (For example, a configuration in which rotation is taken from a driving shaft, the rotation is converted into linear motion via a cam mechanism, and the roller is swung with the axis, and a configuration in which the roller is swung with a cylinder mechanism such as an air cylinder. Or the like, or a configuration in which a swinging mechanism is incorporated in the bridge roller 17 itself. The configuration in which the swinging mechanism is incorporated in the bridge roller 17 itself, that is, a roller with a self-swinging mechanism does not require much extra space, and is therefore preferable in terms of space. Specific examples of the roller with a self-oscillation mechanism include a roller using its own rotating force (for example, a cam groove is provided on the inner surface of the roller, and the cam groove is provided on a shaft rotatably holding the roller. A cam follower that runs in the inside is attached, and the roller rotates and swings according to the cam groove. A fluid pressure type (for example, an air cylinder or a hydraulic cylinder is built in the roller, and pneumatic, hydraulic, etc.) And the like, in which the roller is swung by the fluid pressure.

Usually, a metal roller having a metal surface is used for the pot roller 7, and a rubber roller having a rubber surface is used for the bridge roller 17 and the call roller 8 which contact the metal roller. As a result, the rubber roller comes into contact with the pot roller 7, which is a metal roller, and good transfer of ink and cleaning liquid is secured.

Next, the operation of the inking device 4A having the above configuration will be described. During printing, the bridge roller 17 is at the retracted position shown by the solid line in FIG. 1 and is at a position that does not interfere with the ink supply operation.

When cleaning is performed after printing is completed,
First, with the call roller 8 in contact with the mixing roller 9a, the bridge roller 17 moves to the cleaning position and contacts the pot roller 7 and the call roller 8 to bridge them.

Next, the printing press is put into operation, and each kneading roller 9 is rotated. At this time, the pot roller 7 is separated from the drive system and is rotatable. As a result, when the kneading roller 9 rotates, the call roller 8, the bridge roller 17, and the pot roller 7 also rotate at the same peripheral speed, so that all the rollers 7, 8, 9, 17 are connected. Will rotate. At this time, the bridge roller 17 swings in the axial direction. In this state, as shown in FIG. 2, the cleaning liquid is supplied from the cleaning liquid nozzle 10 onto one of the rollers, for example, onto the pot roller 7, and the cleaning liquid recovery doctor 12 is pressed against one kneading roller 9. deep. As a result, the cleaning liquid dissolves the ink adhered around each roller, and the cleaning liquid containing the ink returns to the kneading roller 9 pressed against the cleaning liquid recovery doctor 12 and is scraped off by the cleaning liquid recovery doctor 12. Each roller is automatically cleaned. Note that the supply of the cleaning liquid may be performed manually.

During the cleaning operation, the bridge roller 17 is oscillating in the axial direction as described above, so that the end of the pot roller 7 having a longer surface length than the calling roller 8 and the kneading roller 9 is also provided. The bridging roller 17 can reliably contact and clean the end of the bridging roller 17, and the bridging roller 17 itself contacts the calling roller 8 as far as the end, so that the ink transferred to the bridging roller 17 also transfers to the calling roller 8 reliably. After all, the pot roller 7 and the bridge roller 17
Can be cleanly washed over the entire length.

After the rotation of each roller is continued for an appropriate time to perform the cleaning operation, the bridge roller 17 is returned to the original standby position, and the rotation of each roller is stopped. Thus, the cleaning operation is completed. Thus, each roller including the pot roller 7 in the inking device 4A can be automatically cleaned.

In the above embodiment, as shown in FIG. 3, the swing range of the bridge roller 17 is changed from the position where the left end of the bridge roller 17 coincides with the left end of the pot roller 7 to the point where the right end of the bridge roller 17 is the pot. Although the position is set up to the position corresponding to the right end of the roller 7, the present invention is not limited to this range, and may be configured to swing over a wider range. However, a smaller swing range is desirable from a mechanical point of view.
If the end of the bridge roller 17 moves to the outside beyond the end of the pot roller 7, ink attached to the outer peripheral surface of the bridge roller 17 may adhere to the end face of the pot roller 7 and become dirty. It is preferable to set the swing range shown in FIG.

In the above embodiment, the bridge roller 1
Although the surface length of the bridge roller 17 is set equal to the surface length of the call roller 8, the surface length of the bridge roller 17 is not limited to this and can be increased or decreased as appropriate. In this case, in order to clean the pot roller 7 well to the end and also to clean the bridge roller 17 itself well to the end, the swing range of the bridge roller 17 is as follows. What is necessary is just to determine so that it may contact the end part reliably and the bridge roller 17 itself can surely contact the calling roller 8 to the end part. As a preferred example of the bridge roller having a surface length different from the surface length of the call roller 8, as shown in FIG. 4A, the median value of each surface length of the pot roller 7 and the call roller 8 is used. And a bridge roller 17A having a surface length of This bridge roller 17
When A is used, the swing range is as shown in FIG.
As shown in (b), a position where the left end of the bridge roller 17A coincides with the left end of the pot roller 7 (at this time, the right end of the bridge roller 17A coincides with the right end of the call roller 8).
To the position where the right end of the bridge roller 17A coincides with the right end of the pot roller 7 (the left end of the bridge roller 17A coincides with the left end of the call roller 8 at this time), and the swing range of the bridge roller is the shortest. Is obtained.

In the above embodiment, the bridge roller 1
When 7 is set to the retracted position, as can be clearly understood from FIG.
Although the bridge roller 17 is in a state of non-contact with other rollers, the present invention is not necessarily limited to this configuration.
When the bridge roller 17 is in the retracted position, the bridge roller 17 may be configured to contact the call roller 8. With this configuration, during printing, the bridge roller 17
Rotates in contact with the call roller 8, and functions as a kneading roller.

In the above embodiment, the pot roller 7 is rotatable during the cleaning operation and is rotated by the rotation of the kneading roller 9. Instead, the pot roller 7 is rotated at the same peripheral speed as the kneading roller 9. It may be configured to forcibly rotate by.

In the above embodiment, the bridge roller 1
The urn roller 7 is connected to the kneading roller 9 by bringing the urging rollers 7 and 17A into contact with the vulcan roller 7 and the call roller 8, but instead of this, a bridge roller is directly connected to the vat roller 7 and one kneading roller 9. It is good also as a structure which can be contacted.

[0022]

As described above, according to the present invention, the fountain roller can be connected to the kneading roller by the bridge roller at the time of cleaning the inking device, so that the fountain roller can be automatically cleaned simultaneously with the automatic cleaning of the kneading roller. And
Since the bridge roller was able to swing in the axial direction,
The long pot roller can be satisfactorily washed over the entire length, and the work load required for the washing operation can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an ink device according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the inking unit shown in FIG.

3A and 3B are diagrams illustrating a swing range of a bridge roller in the inking device illustrated in FIG. 1; FIG. 3A is a schematic plan view illustrating a state where the bridge roller has moved to the left end of the swing range;
(B) is a schematic plan view showing a state in which the bridge roller has moved to the right end of the swing range.

FIG. 4 illustrates the surface length and swing range of a bridge roller in an inking device according to another embodiment of the present invention.
(A) is a schematic plan view showing a state where the bridge roller is located at the center of the swing range, (b) is a schematic plan view showing a state where the bridge roller has moved to the left end of the swing range, and (c) is a bridge roller. Is a schematic plan view showing a state in which is moved to the right end of the swing range.

FIG. 5 is a schematic perspective view showing a printing unit of an offset printing press or letterpress printing press.

FIG. 6 is a schematic perspective view illustrating a cleaning operation in a conventional inking device.

FIG. 7 is a schematic perspective view showing a state in which a conventional inking unit is provided with a bridge roller having the same surface length as a fountain roller to perform automatic cleaning.

FIG. 8 is a schematic perspective view showing a state in which a conventional inking unit is provided with a bridge roller having the same surface length as a calling roller to perform automatic cleaning.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper 2 blanket cylinder 3 plate cylinder 4, 4A inking device 6 ink fountain 7 fountain roller 8 calling roller 9, 9a kneading roller 10 cleaning liquid nozzle 11 cleaning liquid 12 cleaning liquid recovery doctor 14A, 14B, 17, 17A bridge roller

Claims (2)

[Claims] 1. An ink fountain containing ink, a fountain roller for taking out ink from the ink fountain, a plurality of kneading rollers for kneading ink and transferring it to a plate cylinder, and taking out ink from the fountain roller; An inking device for a printing press having a call roller for supplying one of the kneading rollers, further comprising a bridge roller capable of connecting and disconnecting the fountain roller and the kneading roller directly or via a call roller. An inking device for a printing press, comprising: means for swinging a bridge roller in an axial direction. 2. The bridge roller has a surface length set to be equal to a kneading roller or a call roller contacted by the bridge roller, and a swing range of the bridge roller is set such that one end of the bridge roller is formed by the pot roller. 2. The inking device for a printing press according to claim 1, wherein the position is set from a position corresponding to one end to a position where the other end of the bridge roller matches the other end of the pot roller.