JPH0577405A - Ink ductor of printing machine - Google Patents

Abstract

PURPOSE:To improve a roller-washing performance by a method wherein both of low speed printing and high speed printing can effected easily and a roller can be washed without using a washing roller. CONSTITUTION:A drive roller 9 for reducing speed is interposed between an ink fountain roller 2 and a swing roller 5. Further, a first ink ductor 3 is freely swingably arranged between the ink fountain roller 2 and the drive roller 9, and a second ink ductor 4 is respectively freely swingably arranged between the swing roller 5 and the drive roller 9. In the case of low speed printing, the second ink ductor 4 and the second swing lever 21 are swung to the ink fountain roller 2 side by a means 37 containing an air cylinder 38, and the second ink ductor 4 is brought into contact with both of the swing roller 5 and the drive roller 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink feeding device for a printing machine having a plurality of swinging feeding rollers provided between a fountain roller and an inking roller.

[0002]

2. Description of the Related Art Conventionally, as an ink feeding device of this kind in a rotary printing press, one swingable feeding roller is provided between a fountain roller rotating at an extremely low speed and a swing roller rotating at an extremely high speed. However, this causes a large difference in circumferential speed between the roller and the swing roller when they come into contact with the fountain roller, which causes a large acceleration / deceleration shock. There were various problems such as fluctuation, occurrence of shock, printing troubles such as double marks, and wear of parts. Therefore, as a method for solving such a problem, for example, as shown in Japanese Utility Model Application Laid-Open No. 57-11042 and Japanese Patent Application Laid-Open No. 2-103149, ink feeding having a plurality of swinging feeding rollers is provided. A device is disclosed.

FIG. 9 shows a conventional example in which two calling rollers are used. The outline of the example is as follows: 1 is an ink fountain and 2 is an ink fountain.
Is a jar roller, and 5 is a swing roller (reciprocating roller). A drive roller 9 which rotates at a peripheral speed of about ½ of the swing roller 5 is provided between the swing roller 5 and the jar roller 2, and is further driven with the jar roller 2. The first and second calling rollers 3 and 4 are swingably arranged between the rollers 9 and between the swing roller 5 and the driving roller 9. The first calling roller 3 and the second calling roller 4 are oscillated in opposite directions in synchronization with each other, and the first calling roller 3 oscillates in the direction of the broken line arrow to contact and decelerate the pot roller 2. When the fixed amount of ink is received, the second calling roller 4 swings in the direction of the broken line arrow to contact the shaking roller 5, and is accelerated to transfer the ink to the shaking roller 5,
The first calling roller 3 is swung in the solid line arrow direction to contact the drive roller 9 and is accelerated to transfer ink to the roller, while the second calling roller 4 is swung in the solid line arrow direction. Then, the ink comes into contact with the driving roller 9 and is decelerated to receive the ink.
Then, the ink transferred to the shaking roller 5 is smoothed and further supplied to the plate surface on the plate cylinder 8 through a plurality of ink transfer rollers 6 and 7.

In such a structure, since the drive roller 9 having a peripheral speed about half that of the swing roller 5 is interposed between the pot roller 2 and the swing roller 5, the calling rollers 3 and 4 are the pots. To reduce the acceleration / deceleration shock by reducing the peripheral speed difference between the rollers 2, the swing roller 5, and the drive roller 9 from each other when they come into contact with each other by about half as compared with the conventional device having one calling roller. This has the advantage that the above problems can be solved.

[0005]

However, in the conventional ink feeding device, the first and second feeding rollers 3 and 4 are swung to rotate the pot roller 2 and the drive roller 9 regardless of the low speed printing and the high speed printing. Further, since the contact roller is contacted and separated from the swing roller 5, the contact frequency is as many as four times, and there is a problem that as the number of contact increases, the transfer of the ink becomes unstable and the printing trouble occurs. Further, at the time of low speed printing, since the difference in the number of rotations between the pot roller 2 and the swing roller 5 is small, only one calling roller is sufficient. It makes the ink transfer unstable.
Further, in the above configuration, since the drive roller 9 is arranged at a fixed position between the two calling rollers 3 and 4,
As it is, the swing roller 5 cannot be contacted, and the roller cannot be washed. Therefore, it is necessary to provide a cleaning roller between the second calling roller 4 and the swing roller 5 and to contact both of these rollers 4 and 5 during cleaning, but it is difficult to provide the cleaning roller due to space limitations. This causes problems such as a complicated device, an increase in size, and an increase in cost.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to easily deal with both low speed and high speed printing. It is an object of the present invention to provide an ink recalling device for a printing machine, which enables stable and reliable transfer of the ink of the present invention and can perform roller cleaning without using a cleaning roller, thereby improving the roller cleaning performance. ..

[0007]

The present invention has been made to achieve the above object, and the first invention thereof is that a plurality of calling rollers can be freely swung between a fountain roller and an inking roller. In the ink calling device of the printing machine provided in the above, at least one of the calling rollers of two or more of the calling rollers is used.
It is provided with a means for stopping the rocking of one roller and holding it by contact with the other two rollers adjacent thereto. The second invention is
In an ink calling device of a printing machine, in which a plurality of calling rollers are swingably provided between a fountain roller and an inking roller,
Means is provided for stopping all swinging of the calling roller and for holding a series of rollers from the calling roller of the first stage to the inking roller in contact with each other in series.

[0008]

In the first aspect of the invention, the means for stopping at least one of the second and subsequent calling rollers from swinging and holding them in contact with the other two adjacent rollers is the number of contact times of the calling rollers during low-speed printing. To reduce. In the second invention, the means for stopping all swinging of the calling rollers and for holding the roller groups from the first calling roller to the inking roller in contact with each other in series enables cleaning of these roller groups. To do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing an embodiment of an ink dispensing device for a printing machine according to the present invention, FIG. 2 is a developed sectional view of a roller bearing portion, and FIG. 3 is a developed sectional view of essential parts. In addition,
The same components as those in FIG. 9 are designated by the same reference numerals, and the description thereof will be omitted. Further, in FIG. 3, only the swing shaft is shown, and the roller bearing structures such as the pot roller and the drive roller are the same as those in FIG. In these figures, in this embodiment, a deceleration drive roller 9 is provided between the pot roller 2 and the swing roller 5, and the first calling roller 3 and the swing roller 5 are provided between the pot roller 2 and the drive roller 9. And drive roller 9
The second calling rollers 4 are arranged between them so as to be swingable,
A first swing lever 20 for swingably holding the first calling roller 3 and a second swing lever 21 for swingably holding the second calling roller 4 are connected by a rod (connecting member) 22. A structure in which the second call roller 4 is always in contact with the swing roller 5 by connecting them to each other and further by making the swing center of the second swing lever 21 coincide with the rotation center of the second call roller 4. Is.

Each shaft end of the first calling roller 3 is rotatably supported by a holder 24, and the holder 24 is attached to the first swing lever 20. The first swing lever 20 has a frame 2 at each shaft end.
5 and 26 are fitted and fixed to one end of a first swing shaft 27 that is pivotally supported. A swing force is input to this swing shaft 27 by a known cam mechanism or the like (not shown). The first rocking lever 20 is rocked in the left-right direction in FIG. 1 so that the first calling roller 3 comes into contact with and separates from the pot roller 2 and the driving roller 9 alternately. Also, the swing shaft 27
First and second levers 28 and 29 (FIG. 3) are disposed at the other end of the. The first lever 28 is fitted and fixed to the swing shaft 27. On the other hand, the second lever 29 has an engagement hole 31 into which the pin 30 of the first lever 28 is loosely fitted, is rotatably arranged on the swing shaft 27, and is fixed to the frame 26. First air cylinder 32 which is a means for stopping the call when
Is connected via a connecting pin 33. And the second
Since the gap between the pin 30 and the engagement hole 31 is set to be large, the lever 29 is not swung by the first lever 28 during printing (high speed, low speed), and by the first air cylinder 32 during roller cleaning. It is configured to be rotated.

The rod 22, together with the second cylinder 38 and the spring 41, causes the second calling roller 4 to come into contact with both the swing roller 5 and the drive roller 9 during low speed printing.
The connecting arm 40 is fixed to one end and the swing end of the first swing lever 20 is slidably coupled. The second cylinder 38 is fixed to the frame 25, and the distal end portion of the connecting arm 40 is slidably fitted and coupled to the distal end portion of the operating rod 39 thereof. The spring 41 is elastically mounted on the rod 22 and biases the first swing lever 20 in the direction opposite to the second swing lever 21. On the other hand, at the other end of the rod 22, the second
The swing end of the swing lever 21 is connected via a connecting pin 42. The first swing lever 20 has a swing shaft 27 for printing.
When the second swing lever 21 swings in the direction indicated by the solid line in FIG. 1 in accordance with the swing motion in the direction of the second swing lever 21, it slides along the rod 22 against the spring force of the spring 41. Accordingly, the connecting arm 40 of the rod 22 is moved by the force of the compressed spring 41 at this time so that the connecting rod 40 of the second air cylinder 38 operates.
It is moved to the right while sliding the tip portion of 9 so that the second swing lever 21 swings clockwise around the swing roller 5 and separates the second calling roller 4 from the drive roller 9. Let When the connecting arm 40 comes into contact with the tip of the operating rod 39 of the second air cylinder 38 and stops, the swing shaft 2
Since 7 swings in the opposite direction, that is, to the pot roller 2 side, the first swing lever 20 swings integrally with this, and the second swing lever 21 swings in the same direction. Therefore, the second calling roller 4 again contacts the driving roller 9 to transfer the ink from the driving roller 9. In this case, the second
Since the swing lever 21 is swingably disposed on the shaft end of the swing roller 5, the second calling roller 4 is always in contact with the swing roller 5 and is not separated.

The drive roller 9 rotates at a peripheral speed lower than that of the swing roller 5 when the rotation of the swing roller 5 is transmitted through the reduction gear mechanism 43 (FIG. 2). Cooling water is circulated in the drive roller 9 by a known method in order to suppress heat generation of the roller.

FIGS. 4 (a) and 4 (b) show the operating state of the high-speed printing mode, in which the ink fountain is obtained by oscillating the first and second calling rollers 3 and 4 in the same direction in synchronization. The ink supplied from 1 through the fountain roller 2 is transferred to the shaking roller 5, and further supplied to the plate cylinder 8 (FIG. 1) via a plurality of ink transfer rollers 6 and 7.

FIGS. 5 (a) and 5 (b) are diagrams showing the low-speed printing mode in the above configuration. At the time of low speed printing, the second calling roller 4 is brought into contact with both the swing roller 5 and the drive roller 9 by means 37 including the rod 22, the spring 41 and the second air cylinder 38. That is, the second cylinder 38 is operated to extend the operation rod 39 thereof. Then, the actuating rod 39 slides along the connecting arm 40 for a certain stroke and then abuts on the arm 40, so that the operating rod 39 shown in FIG.
Move it to the left for a certain distance. Therefore, the rod 22 also moves integrally with the connecting arm 40 to swing the second swing lever 21 in the counterclockwise direction to bring the second calling roller 4 into contact with the drive roller 9 and set and hold this state. .. On the other hand, since the first rocking lever 20 rocks integrally with the rocking shaft 27, when it is rocked to the left, the first rocking lever 20 comes into contact with the pot roller 2 and receives the transfer of ink from the roller 2. When it is swung rightward against the spring 41, it contacts the drive roller 9 and transfers the ink to the roller 9. Then, this ink is supplied to the plate cylinder 8 via the driving roller 9, the second calling roller 4, the shaking roller 5, and the ink transfer rollers 6 and 7, thereby enabling low-speed printing. FIG. 6 is a diagram showing the call stop mode. In the call stop mode, after the low speed printing state shown in FIG. 5 is set, the swing operation of the swing shaft 27 is stopped, and then the first stop is performed.
The air cylinder 32 (FIG. 3) is operated. Then the second
The lever 29 rotates about the swing shaft 27 toward the drive roller 9 by a predetermined angle, and this rotational movement is transmitted to the first lever 28 by the engagement of the pin 30 and the engagement hole 31, and is shaken in the same direction. To move. Therefore, the swing shaft 27 also moves to the first lever 28.
And the first calling roller 3 are brought into contact with the driving roller 9 as shown in FIG. As a result, all the rollers except the pot roller 2, that is, the first and second calling rollers 3, 4, the driving roller 9, and the swing roller 5 are kept in contact with each other in series, and at this time, a cleaning (not shown) The cleaning liquid is supplied from the device, and the ink and the cleaning liquid adhering to the first and second calling rollers 3, 4, the driving roller 9 and the shaking roller 5 are scraped off by a doctor device (not shown) to clean these roller groups. Is done. It should be noted that during the roller cleaning, the inking roller 46 is separated from the plate cylinder 8.

As described above, in the ink feeding device of the printing machine having such a structure, the second feeding roller 4 is always in contact with the swing roller 5, and therefore, compared with the conventional device shown in FIG. The number of times of contact and separation of the second calling roller 4 is reduced by one, so that the transfer of ink between the second calling roller 4 and the shaking roller 5 can be stably and reliably performed. Further, the second calling roller 4 is provided with a swing roller 5 and a drive roller 9.
Since it is possible to switch to a state in which both of them are in contact with each other, it is possible to reliably transfer the ink between these rollers during low-speed printing. Further, when the second calling roller 2 is switched to a state in which both the swing roller 5 and the driving roller 9 are in contact with each other and the first calling roller 3 is brought into contact with the driving roller 9, the ink from the first calling roller 3 is ejected. Since the roller groups up to the receiving roller 746 (FIG. 1) come into contact with each other in series, the roller groups can be easily cleaned without incorporating a cleaning roller.

In the above embodiment, the case where the distal end portion of the operating rod 39 of the second air cylinder 38 and the connecting arm 40 are slidably connected has been described, but both are fixed to each other and the operating rod 39 is used during printing. May be configured to expand and contract with respect to the cylinder body. Further, if the second lever 29 is fixed to the swing shaft 27 and the rod of the first air cylinder 32 is expanded and contracted with the swing motion of the swing shaft 27 at the time of printing, the first lever 28 is moved. It is unnecessary.

FIG. 7 is a side view of the essential portions showing another embodiment of the present invention. In this embodiment, instead of urging the first calling lever 3 by a spring, the second calling lever 4 is urged by a tension coil spring 50 in the direction opposite to the first calling lever 20. Even with such a configuration, the same effect as that of the above embodiment can be obtained.

FIG. 8 is a layout view of rollers showing another embodiment of the present invention. In this embodiment, three calling rollers 3, 4, 51 are provided so that at least one of the second and third calling rollers 4, 51 is brought into contact with and held by two rollers adjacent thereto during low speed printing. In addition, when cleaning the rollers, the ink roller group from the first calling roller 3 to the inking roller 46 is brought into contact with each other in series. Since the means for contacting in this series is the same as that in the above-mentioned embodiment, the description thereof will be omitted. Even with such a configuration, the same effect as that of the above embodiment can be obtained.

The present invention can be variously modified and modified without being limited to the above embodiment. For example, in the embodiment shown in FIGS. 1 to 3, the second calling roller 4 is always in contact with the swing roller 5, but it is always in contact with the driving roller 9 and is in contact with or separated from the swing roller 5. May be. Further, the second swinging lever 21 is configured to be expandable and contractible, so that the second calling roller 4 can be used during low-speed printing and roller cleaning.
It is also possible to contact the swing roller 5 and the drive roller 9 together.

[0020]

As described above, according to the ink recalling device of the printing machine of the present invention, among the plurality of swingable recalling rollers disposed between the fountain roller and the inking roller. Since at least one of the two or more ink calling rollers is oscillated and stopped so as to be held in contact with the other two rollers adjacent thereto, the number of times of contact and separation of the calling roller during low speed printing is reduced. This enables stable and reliable transfer of ink. Further, since a means for stopping the swinging of all the calling rollers and bringing the ink roller group from the first calling roller to the ink forming roller into contact with each other in series is provided, the cleaning of these ink roller groups is performed. Can be carried out without the provision of the above, and the downsizing of the apparatus and the roller cleaning performance can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an ink feeding device of a printing machine according to the present invention.

FIG. 2 is a developed sectional view of a roller bearing portion.

FIG. 3 is a developed cross-sectional view of a main part.

FIG. 4A and FIG. 4B are diagrams showing modes during high-speed printing.

5A and 5B are diagrams showing modes during low-speed printing.

FIG. 6 is a diagram showing a call stop mode.

FIG. 7 is a side view of essential parts showing another embodiment of the present invention.

FIG. 8 is a layout view of rollers showing still another embodiment of the present invention.

FIG. 9 is a layout view of rollers showing a conventional example of an ink dispensing device.

[Explanation of symbols]

 1 ink fountain 2 fountain roller 3 first calling roller 4 second calling roller 5 swing roller 8 plate cylinder 9 drive roller 20 first swing lever 21 second swing lever 22 rod 27 swing shaft 32 first air cylinder 37 Means 38 Second Air Cylinder 46 Inking Roller

Claims (2)

[Claims] 1. An ink calling device of a printing machine, wherein a plurality of calling rollers are swingably provided between a fountain roller and an inking roller, and at least one of the calling rollers of two or more of the calling rollers is used. An ink feeding device for a printing press, characterized in that a means for stopping one rocking and holding it by contacting with two other rollers adjacent thereto is provided. 2. An ink feeding device of a printing machine, wherein a plurality of calling rollers are swingably provided between a fountain roller and an inking roller. An ink calling device for a printing press, comprising means for contacting and holding a roller group from the eye calling roller to the inking roller in series.