JPH081867Y2 - Ink device with ink cleaning function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an inking device having an ink cleaning function, and more particularly, to an inking device capable of easily and economically cleaning a roll in an inking device.

<Prior Art> Various rotary printing presses are equipped with an inking device that supplies printing ink to the plate surface on the plate cylinder. This inking device is a fountain roll that rotates in an ink fountain and this fountain roll. And an ink forming roll disposed between the plate cylinder and the plate cylinder, or a roll group including the ink forming roll.
Then, the ink drawn from the inside of the ink fountain by the rotation of the fountain roll is transferred to the ink fountain roll directly or through the roll group, and is supplied from the ink fountain roll to the plate surface.

In such an inking device, if the ink is left attached to a roll or the like after printing is completed, the ink dries and interferes with the next printing, so the ink is washed at the end of printing. Also, when changing colors, ink cleaning is performed to remove the ink used in the previous printing.

A general conventional ink cleaning device that performs ink cleaning is to apply a cleaning liquid from above the rolls, wash the ink on the roll surface with the cleaning liquid that flows down between the rotating rolls, and use a doctor blade that contacts the lower rolls to remove the cleaning liquid. The ink is scraped off and collected in the container.

<Problems to be Solved by the Invention> However, when the above-described conventional ink cleaning device is used, the ink fountain, the doctor blade of the ink cleaning device, and the ink recovery container must be cleaned after cleaning the roll.

Further, when the ink cleaning device is applied to an intaglio printing machine, since the viscosity of the ink used in the intaglio printing machine is high, the doctor made of rubber or Teflon loses the viscosity of the ink, I couldn't wash the ink enough,
Or the problem that it cannot be scraped arises.

As one measure to solve this problem, it is possible to make the scraping part of the doctor in the ink cleaning device with a hard material, but in this case the cost will increase and the ink fountain, the doctor and the ink recovery container must be cleaned. The problem of having to remain remains.

<Means for Solving the Problems> The present invention, in order to solve the above problems, arranges the fountain roll at the tip of the fountain blade on the bottom surface of the ink fountain, while the tip of the fountain blade and the fountain are provided on the back side of the fountain blade. In an inking device provided with an adjustment fountain key for adjusting the gap between the roll and the backside of the fountain blade, apart from the adjustment fountain key, the tip of the fountain blade at the time of ink cleaning is the surface of the fountain roll surface. It is characterized in that a pressing member for pressing against is provided.

<Operation> In the above-mentioned inking device, when cleaning the ink, first, the pressing member pushes up the pot blade to press the tip of the pot blade against the pot surface. Next, the cleaning liquid is put in the ink fountain and the fountain roll is rotated. With this, the pot roll, the swing roll that comes into contact with the pot roll,
Inking rolls are cleaned.

<Embodiment> FIGS. 1 and 2 show an embodiment in which the present invention is applied to an inking device of an intaglio printing machine as shown in FIG.

First, the outline of the intaglio printing machine will be described. Reference numeral 1 is an intaglio cylinder that is axially supported by the printer body frame 2, and an intaglio is mounted on the peripheral surface thereof. The impression cylinder 3 pivotally supported by the printer frame 2 is in contact with the peripheral surface of the intaglio cylinder 1. Around the intaglio cylinder 1, inking devices 4, 5 and 6 and a pre-wiping device (not shown) are provided. Inking device 4,5,6
It is attached to the ink unit 7 which can be separated from the main body of the printing machine.

The present invention is applied to the inking devices 4, 5 and 6, but since the configuration is the same, only one inking device 4 will be described.

As shown in FIG. 1, the inking unit 4 includes an ink fountain body 8, a fountain blade (fountain doctor) 9 provided on the upper surface of the ink fountain body 8, and a groove to which ink is supplied by the fountain blade 9. The main constituents are the left and right carcasses 10 that are partitioned and the crucible roll 11 and the like that are provided close to the tip of the crucible blade 9. The tips of the left and right carcasses 10 have an arc shape and are in close contact with the peripheral surface of the pot roll 11. The ink fountain body 8 is supported by the frame of the ink unit 7 via a supporting member (not shown).

The ink fountain main body 8 is provided with a large number of fountain keys (fountain screws) 12 with their tips abutting against the back surface of the fountain blade 9. By adjusting the screwing amount of the crucible key 12, the gap between the tip of the crucible blade 9 and the crucible roll surface is adjusted.

An eccentric shaft 13 extending laterally, that is, in a direction parallel to the fountain roll 11, is provided below the ink fountain body 8.
The eccentric shaft 13 includes a support shaft portion 13a and an eccentric shaft portion 13b that is eccentric with respect to the support shaft portion 13a, and is rotatably supported by the ink fountain body 8 by the support shaft portion 13a. A lever 14 is attached to the eccentric shaft portion 13b of the eccentric shaft 13,
The lever 14 can rotate the eccentric shaft 13. Range of rotation of lever 14 or eccentric shaft 13
The rotation range of is controlled by the lever 14 hitting the stopper stay 15 provided on the ink fountain body 8 and the ink fountain body 8 itself.

On the other hand, on the ink fountain body 8, as a pressing member,
A large number of cleaning pins 16 are housed, the tip of which is located close to the back surface of the tip of the crucible blade 9 and whose rear end is in contact with the eccentric shaft portion 13b of the eccentric shaft 13. The cleaning pin 16 has a cylindrical receiving portion 16a with a bottom inserted into a hole 17 provided in the ink fountain body 8 and a head portion 16b with a rounded tip.
It consists of a pin portion 16c inserted in a and a disc spring 16d interposed between the head portion 16b of the pin portion 16c and the tip of the receiving portion 16a, and the bottom portion (rear end) of the receiving portion 16a is eccentric. The head 16b of the pin portion 16c hits the eccentric shaft portion 13b of the shaft 13 and is positioned close to the rear surface of the tip of the crucible blade 9.

A cover 18 is provided close to the cleaning pin 16,
The ink is prevented from entering the cleaning pin 16 side.

In the inking device 4, the fountain roll 11 is in contact with the inking roll 19, and the inking roll 19 is in contact with the intaglio cylinder 1. In addition, the pot roll 11 is a swing roll for smoothing the ink applied to the pot roll 11.
20 are in contact. The swing roll 20 is swingable in a left-right direction by a certain amount by a cam mechanism.

An ink pan 21 for receiving the dripping ink and the cleaning liquid is provided below the swing roll 20.

Next, the ink cleaning action of the inking device 4 will be described.

During printing, the gap between the tip of the fountain blade 9 and the fountain roll 11 is adjusted by the fountain key 12, and a fixed amount of ink is applied to the fountain roll 11. Vase roll
The ink applied to 11 is leveled by the shaking roll 20, transferred to the inking roll 19, and the inking roll 19
Is transferred to the plate surface of the intaglio cylinder 1.

At this time, the eccentric shaft 13 is in a state in which the lever 14 is in contact with the stopper stay 15 as shown by the chain double-dashed line in FIG. In the figure, a is the center (invariant) of the support shaft portion 13a of the eccentric shaft 13, and b ₁ is the center of the eccentric shaft portion 13b at this time.
Therefore, the receiving portion 16a of the cleaning pin 16 is at the position retracted in the hole 17, and the pin head 16b at the tip does not contribute to the pushing out of the crucible blade 9.

When cleaning the ink, first remove the ink remaining in the ink fountain. This work is done by overturning the ink fountain.

Next, after returning the ink fountain to its original position, the lever 14 is rotated in the direction of arrow A to a position where it comes into contact with the ink fountain body 8. By rotating in this way, the center of the eccentric shaft portion 13b of the eccentric shaft 13 is displaced as b ₁ → b ₂ → b _3, and the eccentric shaft portion 13b moved to the position shown by the solid line in the figure has the cleaning pin 16 attached. Push up. By pushing out the cleaning pin 16,
The pin head 16b pushes up the tip of the pot blade 9 and elastically presses the tip of the pot blade 9 against the surface of the pot roll 11. The center b ₃ of the eccentric shaft portion 13b after the displacement is a point (dead point) where the center a of the support shaft portion, the center b ₂ of the eccentric shaft portion 13b, and the central axis of the cleaning pin 16 are aligned. Since it has exceeded, the lever 14 and the ink fountain body 8 are in contact with each other while the eccentric shaft portion 13b is applied with a force to rotate it in the direction of the arrow B, so that this state is maintained.

Next, put the cleaning liquid 22 in the ink fountain and
To rotate. The crucible roll 11 is rotated by a single drive motor (not shown). At this time, swing roll 20
It contacts the crucible roll 11 and is rotated together with the crucible roll 11 via a gear.

Since the pot 9 is elastically pressed against the pot roll 11 by the cleaning pin 16, the ink adhering to the pot roll 11 is wiped off by the pot blade 9 and washed by the washing liquid. The ink attached to the shaking roll 20 is transferred to the fountain roll 11 and wiped off in the same manner. If the ink fountain roll 19 is brought into contact with the fountain roll 11, the ink on the surface of the ink fountain roll 19 is also washed.

After the cleaning of the pot roll 11, the swing roll 20, and the inking roll 19, the water on the roll surface is wiped off with a waste cloth. At this time, the remaining cleaning liquid is dropped into the lower ink pan 21 and collected and removed.

After the above, the ink fountain itself, the fountain blade 9 and the meat cough
Wash 10 by hand and finish the washing work.

Another embodiment of the inking device according to the present invention is shown in FIGS.
Shown in the figure. This embodiment corresponds to the eccentric shaft 13 in the previous embodiment.
Instead of this, a chamfered shaft 23 is used. This chamfer axis
As shown in FIG. 7, both ends of the support shaft 23 are support shaft parts 23a rotatably supported by the ink fountain body 8, and a large-diameter shaft part 23b is provided between the support shaft parts 23a. The flat surface portion 23c is formed over the entire length in the axial direction on a part of the peripheral surface. The lever 14 is attached to the shaft portion 23b. As shown in FIG. 5, the flat portion 23c corresponds to the rear end of the cleaning pin 16 when the lever 14 is in contact with the stopper stay 15. Therefore, the cleaning pin 16 is in the retracted state.

As shown in FIG. 6, when the lever 14 is rotated to a position where it contacts the ink fountain body 8, the rear end of the cleaning pin 16 comes into contact with the peripheral surface of the shaft portion 23b of the chamfered shaft 23, and the cleaning pin 16 is pushed out by a predetermined amount. It will be. As a result, similarly to the above, the tip of the crucible blade 9 is elastically pressed against the surface of the crucible roll 11.

In order to maintain the above state, the chamfered shaft 23 after rotation
A detent plunger 24 that comes into contact with the flat portion 23c is screwed to the ink fountain body 8. This plunger 24
As shown in FIG. 8, an outer cylinder 24 having threads formed in the drawing
Inside a, a piston 24b and a spring that biases it in the protruding direction
It has a built-in 24c.

The ink cleaning action using this inking unit 4 is the same as that of the above-mentioned embodiment.

FIG. 9 shows an inking device according to another embodiment. In this embodiment, a small hydraulic cylinder is used as a cleaning pin.
25 is used. In other words, the small hydraulic cylinder is installed at the position where the cleaning pin 16 is provided in the previous embodiment.
25 is provided.

The small hydraulic cylinder 25 has a structure in which a piston rod 25a and a spring (not shown) for returning the piston rod 25a are built-in, and by applying hydraulic pressure, the piston rod 25a is projected against the spring force. In order to supply hydraulic pressure to the hydraulic cylinders 25, oil passages 26 are formed by connecting the rear portions of the cylinders 25, and the oil passages 26 are connected to a hydraulic pressure source via a manual valve or an electromagnetic valve.

In this inking device, when the ink is washed, the hydraulic pressure is supplied to the small hydraulic cylinder 25 so that the piston rod
25a projects, and the tip of the crucible blade 9 is pushed from the back surface and pressed against the surface of the crucible roll 11. The subsequent cleaning work is performed in the same manner as in the previous embodiment.

In addition, in this inking device, by providing a pressure adjusting valve in the hydraulic circuit of the small hydraulic cylinder 25, it becomes possible to adjust the force for pressing the fountain blade 9 against the fountain roll 11, and when the viscosity of the used ink changes. You will be able to respond.

As the structure of the cleaning pin in the present invention, a structure other than the above-mentioned embodiment can be adopted, and a structure having another structure can be adopted as a means for pressing the cleaning pin against the pot blade 9. In addition, although the present invention is applied to the inking device of the intaglio printing machine in the above embodiment, the present invention can be applied to the inking device of the entire printing press.

<Effect of the Invention> According to the inking device of the present invention, since the fountain blade is pressed against the fountain roll to clean the ink, the cleaning work efficiency is improved, and only the ink fountain can be hand-washed even after the cleaning process. Since it is good, the number of manual processes is reduced and the amount of waste cloth used is also reduced. Also, the inking roll can be cleaned at the same time. Furthermore, since the pot blade is used as a doctor for cleaning ink,
Cost can be reduced compared to the case where a doctor is separately provided.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view of an inking device according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view as seen from the left side, and FIG. 3 is an eccentric shaft pushing pin for cleaning. FIG. 4, FIG. 4 is a schematic view of an intaglio printing press, FIG. 5 is a side view showing a partial cross section of another embodiment, FIG. 6 is a partial view showing a different state, and FIG. 7 is a chamfer. FIG. 8 is a perspective view of the shaft, FIG. 8 is a partial cross-sectional view of the plunger, and FIG. 9 is a partial cross-sectional side view of still another embodiment. In the drawings, 1 is an intaglio cylinder, 3 is an impression cylinder, 4, 5 and 6 are inking devices, 8 is an ink fountain body, 9 is a fountain blade, 11 is a fountain roll, 13 is an eccentric shaft, 14 is a lever, and 15 is a stopper. A stay, 16 is a cleaning pin, 19 is an inking roll, 20 is a swing roll, 22 is a cleaning liquid, 23 is a chamfering shaft, 24 is a detent plunger, and 25 is a small hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] 1. A fountain roll is arranged at the tip of the fountain blade on the bottom surface of the ink fountain, and an adjusting fountain key for adjusting a gap between the tip of the fountain blade and the fountain roll is provided on the back side of the fountain blade. In the inking device, the inking device is provided on the back side of the fountain blade, in addition to the adjusting fountain key, a pressing member for pressing the tip of the fountain blade against the surface of the fountain roll during ink cleaning.