JP2012066463A - Inking device and gravure printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply ink efficiently to an end part of a contact part of a plate cylinder and a furnisher roll without wearing the plate cylinder, the furnisher roll, and a damming plate.SOLUTION: The inking device includes: the rotatable plate cylinder 30; the furnisher roll 20 which is arranged to be in contact with the plate cylinder 30 and can rotate; an ink supply passage 80 for supplying ink I above the contact part of the plate cylinder 30 and the furnisher roll 20; and a pair of damming parts 10 for suppressing the ink from flowing out from both the end parts of the plate cylinder 30 and the furnisher roll 20. The damming parts 10 are arranged so as not to be in contact with the plate cylinder 30 and the furnisher roll 20.

Description

  The present invention relates to an inking device for supplying a coating liquid, ink, and the like (hereinafter collectively referred to as ink) to a plate cylinder, and a gravure printing machine using such an inking device.

  One of the ink circulation methods of the gravure printing machine is a finisher roll system that has little remaining meat and less troubles due to bubbles and dry film. Recently, a method of supplying ink I from the upper portion of the finisher roll 20 has been adopted as shown in FIG.

  The ink I is sucked up from the ink tank 70 by a driving unit 75 such as a pump, and is supplied by the ink supply path 80 to the central portion in the width direction above the contact portion (contact surface) between the plate cylinder 30 and the finisher roll 20. . Ink I supplied from the ink supply path 80 is supplied to the contact portion between the plate cylinder 30 and the finisher roll 20, and excess ink I is discharged from both ends of the plate cylinder 30 and the finisher roll 20 to the ink pan 35. Is done.

  In general, since both ends of the plate cylinder 30 and the finisher roll 20 are open as shown in FIG. 7, sufficient ink is provided up to the end of the contact portion between the plate cylinder 30 and the finisher roll 20. In order to supply I, it is necessary to supply excess ink I, and the power of the drive unit 75 such as a pump increases.

  In this regard, in Patent Document 1, a close-up damming plate is provided in order to prevent ink from splashing. According to such an aspect, ink can be efficiently stored up to the end of the contact portion, it is not necessary to supply ink excessively, and the power of the drive portion such as a pump can be reduced.

  However, since the damming plate is in close contact with the end surface of the plate cylinder and the end surface of the finisher roll, there is a concern about the wear of the plate cylinder, the finisher roll and the damming plate, which is introduced into an actual gravure printing machine. It is difficult. Further, when the plate cylinder is swung in the axial direction, a mechanism for causing the damming plate to follow is required, and the structure becomes complicated.

Japanese Patent Application No. 8-39759

  The present invention has been made in consideration of such points, and the plate cylinder, the finisher roll and the damming plate are not worn, and the end portion of the contact portion between the plate cylinder and the finisher roll is provided. It is an object of the present invention to provide an inking device and a gravure printing machine that can efficiently supply ink up to.

The inking device according to the present invention comprises:
A rotatable plate cylinder,
A furnisher roll which is arranged in contact with the plate cylinder and is rotatable,
An ink supply path for supplying ink above a contact portion between the plate cylinder and the finisher roll;
A pair of damming portions for suppressing ink from flowing out from both ends of the plate cylinder and the finisher roll,
The damming portion is provided so as not to contact the plate cylinder and the finisher roll.

The inking device according to the present invention comprises:
A pool pan provided extending in the axial direction of the furnisher roll and receiving the ink;
An attachment portion for attaching the damming portion to the pool pan may be provided.

In the inking device according to the present invention,
The mounting portion includes a metal material,
The damming portion includes a base made of a magnet and attached to the mounting portion; a damming plate extending from the base to suppress ink from flowing out from both ends of the plate cylinder and the finisher roll; You may have.

In the inking device according to the present invention,
The attachment portion may extend in the axial direction of the finisher roll.

In the inking device according to the present invention,
The damming plate may be made of an aluminum alloy.

In the inking device according to the present invention,
The damming portion may be capable of adjusting a height relative to the finisher roll.

The gravure printing machine according to the present invention is:
A rotatable plate cylinder,
A furnisher roll which is arranged in contact with the plate cylinder and is rotatable,
An ink supply path for supplying ink above a contact portion between the plate cylinder and the finisher roll;
A pair of damming portions for suppressing ink from flowing out from both ends of the plate cylinder and the finisher roll;
A doctor that extends in the axial direction of the plate cylinder and removes excess ink adhered to the plate cylinder by contacting the surface of the plate cylinder;
An impression cylinder that is rotatably provided and presses the printed material against the plate cylinder,
The damming portion is provided so as not to contact the plate cylinder and the finisher roll.

  According to the present invention, the pair of damming portions that prevent the ink from flowing out from the both ends of the plate cylinder and the finisher roll are provided so as not to contact the plate cylinder and the finisher roll. For this reason, ink can be efficiently supplied to the end of the contact portion between the plate cylinder and the finisher roll without wearing the plate cylinder, the finisher roll, and the blocking plate.

  Further, according to the present invention, it is possible to prevent the structure of the inking device from becoming complicated even when the plate cylinder is swung in the axial direction.

1 is a side sectional view showing a configuration of a gravure printing machine according to an embodiment of the present invention. In an embodiment of the present invention, a perspective view showing a state where ink is stored above a contact portion of a plate cylinder and a finisher roll. In embodiment of this invention, the perspective view for showing a mode that the damming part was attached. The front view and side view which show the structure of the damming part by embodiment of this invention. The front view and side view for showing that the height can be adjusted in the damming portion according to the embodiment of the present invention. Side sectional drawing which shows the structure of the conventional gravure printing machine. The perspective view which shows a mode that ink was supplied above the contact part of a plate cylinder and a finisher roll in a prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an inking device and a gravure printing machine according to the present invention will be described below with reference to the drawings. Here, FIG. 1 to FIG. 5 are diagrams showing an embodiment of the present invention.

  As shown in FIG. 1, the gravure printing machine of the present embodiment includes a plate cylinder 30 having a recess (cell) (not shown) in which ink I is embedded and rotatable about a plate cylinder shaft 31, and a plate cylinder. The ink I is supplied to a finisher roll 20 that is disposed in contact with the finisher 30 and is rotatable about the finisher roll shaft 21, and a contact portion (contact surface) between the plate cylinder 30 and the finisher roll 20. For the ink supply path 80 and the axial direction of the finisher roll 20 (a direction parallel to the finisher roll axis 21). And a pool pan 15 that covers the side (the right side in FIG. 1) and the bottom and receives ink I. In this embodiment, since the finisher blade bank method using the pool pan 15 is used, the minimum circulation amount of the ink I can be reduced as compared with other inking methods. The cost can be reduced.

  Further, as shown in FIG. 3, a pair of damming portions 10 that suppress the ink I from flowing out from both ends of the plate cylinder 30 and the finisher roll 20 above the vicinity of the end portion of the finisher roll 20. Is provided.

  In FIG. 2, the ink I is prevented from flowing out from both end portions of the plate cylinder 30 and the finisher roll 20 by the dam plate 12 of the dam section 10 described later, and the plate cylinder 30 and the finisher roll 20. It is a perspective view which shows a mode that the ink I is stored above the contact part. As shown in FIG. 2, the ink supply path 80 extends above the pool pan 15 toward the center in the width direction above the contact portion between the plate cylinder 30 and the finisher roll 20. The ink I is supplied to the central portion in the width direction above the contact portion.

  The damming portion 10 of the present embodiment is provided so as not to contact the plate cylinder 30. More specifically, as shown in FIGS. 4 (a) and 4 (b), the damming portion 10 extends from the base 11 and the base 11, and the ink I is applied from both ends of the plate cylinder 30 and the finisher roll 20. It has a damming plate 12 for suppressing the flow out. The base 11 and the damming plate 12 are fastened by screws 13. 4A is a front view showing the configuration of the damming portion 10 according to the present embodiment, and FIG. 4B is a side view showing the configuration of the damming portion 10 according to the present embodiment. .

  As shown in FIG. 1, the side surface of the damming plate 12 on the plate cylinder 30 side (left side in FIG. 1) extends linearly in the vertical direction, and the damming plate 12 on the plate cylinder 30 side. A substantially triangular space is formed between the side surface and the plate cylinder 30 in the cross section.

  In the present embodiment, a gap is also provided between the damming portion 10 and the finisher roll 20, and the damming plate 12 of the damming portion 10 does not contact the finisher roll 20. More specifically, as shown in FIG. 1, the bottom surface of the damming plate 12 has an arc shape along the outer periphery of the finisher roll 20 having a circular cross section. A constant interval is provided between the outer periphery of the shear roll 20 and the lower surface of the damming plate 12.

  By the way, in this Embodiment, it uses the aspect by which the pair of damming parts 10 are provided above the edge part of the finisher roll 20, ie, it overlaps with the finisher roll 20 in the width direction. explain. However, it is not restricted to this, For example, a pair of damming parts 10 may be provided so that the end surface of the finisher roll 20 may be covered. Also in this case, the damming portion 10, the finisher roll 20 and the plate cylinder 30 are not in contact with each other.

  As shown in FIG. 3, the pool pan 15 of the present embodiment includes a side extending portion 15 b provided on the opposite side of the finisher roll 20 from the plate cylinder 30 side, and a side extending portion 15 b. The lower extension part 15a which extends from the lower end part and covers the lower part of the finisher roll 20 is provided. And the attachment metal fitting (attachment part) 16 for attaching the base 11 of the damming part 10 to the opposite side (right side of FIG. 1 and FIG. 3) of the side extension part 15b of a pool pan to the finisher roll 20 side. Are extended in the axial direction of the finisher roll 20 (a direction parallel to the finisher roll axis 21).

  In the present embodiment, the mounting bracket 16 is made of a metal material, and the base portion 11 of the damming portion 10 is made of a magnet. Further, the damming plate 12 of the damming portion 10 is made of an aluminum alloy. However, these are merely examples, and each of the material of the mounting portion, the material of the base portion 11 and the material of the damming plate 12 can be appropriately changed. However, when an aluminum alloy is used as the material of the damming plate 12, it is advantageous in that the damming plate 12 can be lightened.

  Moreover, in this Embodiment, the damming part 10 can adjust the height with respect to the finisher roll 20. As shown in FIG. More specifically, by placing the adjustment plate 14 between the base 11 and the damming plate 12 (see FIGS. 5A and 5B), the height of the damming plate 12 can be increased, As a result, the height of the damming plate 12 relative to the finisher roll 20 can be adjusted. The method of adjusting the height of the damming unit 10 relative to the finisher roll 20 is not limited to such a mode. For example, the position of the mounting bracket 16 can be moved in the vertical direction. It is also possible to adjust the height of the damming unit 10 relative to the finisher roll 20 by changing the position.

  As shown in FIG. 1, the inking device applies ink to the ink tank 70 that receives and stores the ink I discharged from the ink discharge path 10, and applies driving force to the ink I stored in the ink tank 70. And a drive unit 75 such as a pump for discharging. Then, by applying a driving force to the ink I stored in the ink tank 70, the ink I flows from the ink tank 70 to the ink supply path 80. Thereafter, the ink I is transferred from the ink supply path 80 to the plate cylinder. 30 and the finisher roll 20 are supplied above the contact portion.

  When the ink I is supplied from the ink supply path 80 above the contact portion between the plate cylinder 30 and the finisher roll 20, the ink I accumulates above the contact portion between the plate cylinder 30 and the finisher roll 20. . At this time, since the damming portion 10 can suppress the ink I from flowing out from both ends of the plate cylinder 30 and the finisher roll 20, the ink I is efficiently stored and supplied to the end of the contact portion. be able to. The accumulated ink I is transferred to the concave portion of the plate cylinder 30 at the contact portion between the plate cylinder 30 and the finisher roll 20. By the way, the plate cylinder 30 rotates clockwise in FIG. 1, and the finisher roll 20 rotates counterclockwise in FIG. At this time, the rotational speed of the finisher roll 20 is slower than the rotational speed of the plate cylinder 30.

  As shown in FIG. 1, a doctor 25 for removing excess ink I attached to the plate cylinder 30 is provided on the opposite side of the finisher roll 20 with respect to the plate cylinder 30. The doctor 25 extends in the axial direction of the plate cylinder 30 and removes excess ink I attached to the plate cylinder 30 by contacting the surface of the plate cylinder 30. Further, the doctor 25 can swing in the axial direction of the plate cylinder 30, and it is possible to prevent streaks from being generated on the web (printed material) 60 described later by swinging the doctor 25.

  As shown in FIG. 1, an ink pan 35 is provided below the plate cylinder 30 for receiving ink I and the like that is scraped off from the surface of the plate cylinder 30 by the doctor 25. The ink pan 35 is connected to the ink tank 70, and the ink I received by the ink pan 35 flows into the ink tank 70.

  Further, as shown in FIG. 1, an impression cylinder 40 that is rotatable about an impression cylinder shaft 41 is provided above the plate cylinder 30. Then, a belt-like web (printed material) 60 made of paper or the like passes between the plate cylinder 30 rotating with the ink I embedded in the recesses and the impression cylinder 40 pressing the web 60 against the plate cylinder 30 while rotating. As a result, the ink I is transferred from the plate cylinder 30 to the web 60, and as a result, printing is performed on the web 60. By the way, the impression cylinder 40 rotates counterclockwise in FIG.

  Next, the operation and effect of the present embodiment having such a configuration will be described.

  First, the ink I is supplied from the ink supply path 80 to the central portion in the width direction above the contact portion between the plate cylinder 30 and the finisher roll 20.

  The ink I thus supplied is stored above the contact portion between the plate cylinder 30 and the finisher roll 20. At this time, since the damming portion 10 can suppress the ink I from flowing out from both ends of the plate cylinder 30 and the finisher roll 20, the ink I is efficiently stored and supplied to the end of the contact portion. be able to.

  The ink I collected in this way is transferred to the concave portion of the plate cylinder 30 at the contact portion between the plate cylinder 30 and the finisher roll 20. Excess ink is removed by the doctor 25 from the ink I transferred to the concave portion of the plate cylinder 30.

  Then, the web 60 is pressed against the plate cylinder 30 that has passed through the doctor 25 with the pressure copper 40, whereby the ink I is transferred from the plate cylinder 30 to the web 60, and as a result, printing is performed on the web 60.

  On the other hand, for example, ink I that has fallen downward from between the plate cylinder 30 and the finisher roll 20 without being transferred to the concave portion of the plate cylinder 30 at the contact portion between the plate cylinder 30 and the finisher roll 20 is generated by the pool pan 15. I can receive it. The ink I received by the pool pan 15 and the excess ink I removed by the doctor 25 as described above are received by the ink pan 35.

  The ink I received by the ink pan 35 is transported to the ink tank 70 and stored in the ink tank 70.

  Thereafter, the ink I stored in the ink tank 70 receives the driving force from the driving unit 75 and flows into the ink supply path 80 from the ink tank 70, and again from the ink supply path 80, the plate cylinder 30 and the furnisher. Ink I is supplied above the contact portion with the roll 20. For this reason, the ink I can be automatically reused.

  According to the present embodiment, the damming portion 10 is provided so as not to contact the plate cylinder 30 and the finisher roll 20. For this reason, it is possible to prevent the plate cylinder 30, the finisher roll 20 and the damming plate 12 from being worn. For this reason, there is no need to perform maintenance due to wear.

  Further, according to the present embodiment, since the damming portion 10 is provided so as not to contact the plate cylinder 30 and the finisher roll 20, a mode in which the plate cylinder 30 is swung in the axial direction is adopted. However, it is possible to prevent the structure of the inking device from becoming complicated.

  Furthermore, since the bottom surface of the damming plate 12 has an arc shape along the outer periphery of the finisher roll 20 having a circular cross section, the damming plate 12 and the finisher roll 20 Can be made as small as possible.

  On the other hand, the side surface of the damming plate 12 on the plate cylinder 30 side extends in a straight line in the vertical direction, and the side surface between the side surface of the damming plate 12 on the plate cylinder 30 side and the plate cylinder 30 is substantially in cross section. Since the triangular space is formed, it is possible to reliably prevent the damming plate 12 and the plate cylinder 30 from contacting each other. In addition, by not completely preventing the flow of the ink I in this manner, it is possible to ensure the minimum necessary amount of circulation of the ink I.

  In the present embodiment, the height of the damming portion 10 relative to the finisher roll 20 can be adjusted in the manner shown in FIGS. 5A and 5B, for example. The amount of ink I stored above the contact portion can be appropriately adjusted according to the size and the like.

  Moreover, in this Embodiment, since the attachment metal fitting 16 is provided in the conventional pool pan 15, the existing inking apparatus can be utilized. For this reason, the damming portion 10 according to the present embodiment can be easily introduced.

  In the present embodiment, since the base 11 of the damming portion 10 is a magnet, the damming portion 10 can be easily detached from the mounting bracket 16 and the damming portion 10 can be easily cleaned. be able to.

  In addition, since the mounting bracket 16 extends in the direction in which the finisher roll shaft 21 of the finisher roll 20 extends and the base portion 11 of the blocking portion 10 is made of a magnet, the blocking portion 10 The installation position of can be freely changed in the width direction. For this reason, even when the width of the web changes and the width of the plate cylinder 30 changes, the installation position can be easily changed.

  By the way, even if the base 11 is not made of a magnet, if the mounting bracket 16 extends in the direction in which the finisher roll shaft 21 extends as in the present embodiment, for example, the dam 10 Providing a clamping part that clamps the mounting bracket 16 in the base part 11 is preferable in that the installation position of the damming part 10 can be freely changed in the width direction.

  In addition, according to this Embodiment, since the ink I can be efficiently stored to the edge part of the contact part of the plate cylinder 30 and the finisher roll 20, the circulation amount of the ink I can be decreased. For this reason, it can also be expected that the solvent contained in the ink I is prevented from evaporating.

10 Damping part 11 Base 12 Damming plate 14 Adjustment plate 15 Pool pan 16 Mounting bracket (Mounting part)
20 Furnisher roll 25 Doctor 30 Plate cylinder 35 Ink pan 40 Impression cylinder 60 Web (printed matter)
70 Ink tank 75 Drive unit 80 Ink supply path I Ink

Claims (7)

A rotatable plate cylinder,
A furnisher roll which is arranged in contact with the plate cylinder and is rotatable,
An ink supply path for supplying ink above a contact portion between the plate cylinder and the finisher roll;
A pair of damming portions for suppressing ink from flowing out from both ends of the plate cylinder and the finisher roll,
The inking device, wherein the damming portion is provided so as not to contact the plate cylinder and the finisher roll. A pool pan provided extending in the axial direction of the furnisher roll and receiving the ink;
The inking device according to claim 1, wherein an attachment portion for attaching the damming portion to the pool pan is provided. The mounting portion includes a metal material,
The damming portion includes a base made of a magnet and attached to the mounting portion; a damming plate extending from the base to suppress ink from flowing out from both ends of the plate cylinder and the finisher roll; The inking device according to claim 2, comprising: It further comprises an attachment part for attaching the damming part,
4. The inking device according to claim 1, wherein the attachment portion extends in an axial direction of the finisher roll. 5.   The inking device according to claim 3, wherein the damming plate is made of an aluminum alloy.   The inking device according to any one of claims 1 to 5, wherein the damming portion can be adjusted in height with respect to the finisher roll. A rotatable plate cylinder,
A furnisher roll which is arranged in contact with the plate cylinder and is rotatable,
An ink supply path for supplying ink above a contact portion between the plate cylinder and the finisher roll;
A pair of damming portions for suppressing ink from flowing out from both ends of the plate cylinder and the finisher roll;
A doctor that extends in the axial direction of the plate cylinder and removes excess ink adhered to the plate cylinder by contacting the surface of the plate cylinder;
An impression cylinder that is rotatably provided and presses the printed material against the plate cylinder,
The gravure printing machine, wherein the damming portion is provided so as not to contact the plate cylinder and the finisher roll.

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