JPH11300934A - Ink chamber apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve quality of printed matters and to cope with photogravure plate cylinders with different outer diameters. SOLUTION: A chamber main body 1 which has an ink storing chamber 7 and transfers ink fed into the ink storing chamber 7 from an exterior ink feeding means on a plate face of a photogravure plate cylinder Y is provided. In addition, a supporting part 2 for supporting the chamber main body 1 and a reciprocating driving means 3 for reciprocating the supporting part 2 in a small dimension are provided and the chamber main body 1 is reciprocated in a small dimension in the left and right axial direction to the printing plate cylinder Y.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink chamber device for transferring ink to a printing plate cylinder for gravure printing or the like.

[0002]

2. Description of the Related Art As a conventional ink chamber apparatus,
There is a type in which ink is applied to a printing plate cylinder through an ink transfer roll (anilox) of a flexographic printing press. The chamber body includes a chamber main body provided along the ink transfer roll, and a frame for fixing and supporting the chamber main body. Are an ink reservoir chamber to which ink is supplied from an external ink supply means, a front opening opening to the ink transfer roll, and an ink transfer roll which is provided as an outwardly projecting shape at an opening edge of the front opening and rotates. And a pair of doctor blades that slide on the front surface of the chamber main body so that ink is applied to the surface of the ink transfer roll from the ink reservoir through the front opening.

[0003]

However, in this conventional ink chamber apparatus, the doctor blade scrapes the ink transfer roll so that excess ink does not adhere to the ink transfer roll. ) There is a problem that streaks or lines are formed on printed matter when foreign matter, paper dust, or the like adheres. Therefore, the printing operation has to be interrupted to remove the foreign matter and the like, which is troublesome, and there is a problem that the working efficiency is deteriorated. In addition, in gravure printing, since a large number of printing plate cylinders having different outer diameters are used, a known ink chamber device for flexographic printing has a structure in which the front-rear distance between printing plate cylinders having different outer diameters cannot be adjusted. Therefore, it was not possible to correspond to gravure printing plate cylinders having different outer diameters.

Accordingly, an object of the present invention is to provide an ink chamber device which can improve the quality of printed matter and can cope with gravure printing plate cylinders having different outer diameters.

[0005]

In order to achieve the above-mentioned object, an ink chamber device according to the present invention comprises: an ink reservoir chamber to which ink is supplied from an external ink supply means;
A printing plate having a front opening opening on the printing plate cylinder side, and a pair of doctor blades provided as an outwardly projecting shape at an opening edge of the front opening, and printing ink in the ink reservoir chamber. In an ink chamber apparatus provided with a chamber main body that transfers to a plate surface of a cylinder, a support portion for supporting the chamber main body is provided, and a reciprocating drive unit for reciprocating the support portion in a small size is provided, and the chamber main body is printed. The small size reciprocation is performed in the left-right axis direction with respect to the plate cylinder.

Further, there is provided a forward / backward movement mechanism for integrally moving the chamber body, the support portion, and the reciprocating drive means in a direction approaching / separating from the printing plate cylinder.

In addition, an ink reservoir chamber to which ink is supplied from an external ink supply means, a front opening opening toward the printing plate cylinder, and an outwardly projecting shape are provided at the opening edge of the front opening. Having a pair of doctor blades, and
In an ink chamber device provided with a chamber main body that transfers ink in the ink reservoir chamber to the plate surface of the printing plate cylinder, a support rod mounted on the back side of the chamber main body in the left-right direction, and from both left and right ends of the support rod A support portion having a pair of left and right connecting members suspended downward is provided,
A pair of left and right first slide members provided at lower ends of the pair of left and right connection members, a pair of left and right first guide members for holding the pair of left and right first slide members slidably in the left and right direction, and the support portion A reciprocating drive unit having a driving unit for reciprocating the left and right small dimensions, and a pair of left and right second slide members connected to the pair of left and right first guide members and the driving unit; A pair of left and right second members for holding the second slide member so as to be slidable in the front-rear direction.
A front-rear movement mechanism having a guide member, a nut portion provided on the second slide member, and a screw shaft screwed to the nut portion and rotatably pivotally mounted on the second guide member is provided. Things.

Further, the inclination angle of the downstream blade of the pair of doctor blades can be changed freely.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIGS. 1 to 3 show an embodiment of an ink chamber apparatus according to the present invention. The ink chamber apparatus is provided along a gravure printing plate cylinder Y and applies ink to the plate surface of the gravure printing plate cylinder Y. Chamber body 1 for transferring (coating) to the chamber, a support portion 2 for supporting the chamber body 1, reciprocal drive means 3 for reciprocating the support portion 2 in small dimensions, reciprocal drive means for the chamber body 1 and the support portion 2. 3 and a back-and-forth moving mechanism 4 for integrally moving the printing plate 3 with the printing plate cylinder Y.

Specifically, the chamber body 1
A main body 5 having a U-shaped cross section having an ink reservoir 7 therein and a front opening 6 opening to the gravure printing plate cylinder Y side, and an opening edge of the front opening 6 of the main body 5 And a pair of doctor blades 8, 8 provided as outwardly protruding shapes. In the present embodiment, the chamber main body 1 is brought into contact with the gravure printing plate cylinder Y from the horizontal direction, and a pair of doctor blades 8 and
Reference numeral 8 is fixed to upper and lower opening edges of the front opening 6 by stopper plates 9 and 9 and a bolt member.

Also, left and right opening edges 10, 10 of the front opening 6 are provided.
The middle of 10 is formed in an arc shape, and the left and right opening edges
End seal members 11, 11 formed of an organic solvent-resistant elastic body (for example, synthetic rubber or foamed plastic) are provided between the upper and lower doctor blades 8 and 8.
Is attached.

An ink supply path 12 for sending ink from an external ink supply means into the ink reservoir 7 is provided at an intermediate position on the left and right of the rear wall of the main body 5.
An ink return path for returning and circulating the ink in the ink reservoir 7 to the ink supply device is provided at the left and right positions on the rear wall.
13 are provided.

The support 2 is provided with a main body 5 of the chamber main body 1.
Support rod 14 attached to the back side of
A pair of left and right connecting members suspended downward from both left and right ends of 14
The support rod 14 is attached to the back surface of the main body 5 at its intermediate portion by two attachment members 16, 16.
Further, between the left and right connecting members 15, 15, there is provided a receiving tray 36 for receiving ink dripping when ink is supplied from the chamber main body 1 to the printing plate cylinder Y, and a discharge port 36 a provided on the bottom wall of the receiving tray 36. To discharge the ink to the outside.

The reciprocating drive means 3 includes a pair of left and right first slide members 17, 17 provided at the lower ends of a pair of left and right connection members 15, 15 of the support portion 2, and a pair of left and right first slide members 17, 17, respectively.
And a pair of left and right first guide members 18 and 18 for slidably holding the supporting member 2 in the left and right direction, and a driving portion 19 for reciprocating the support portion 2 in the left and right direction by a small dimension.

The first guide member 18 has a rail portion 20 having a T-shaped cross section, and the first slide member 17 has a dovetail groove portion 21 having a lower opening and slidably fitted to the rail portion 20. For example, a slide bearing is provided between the rail portion 20 and the dovetail portion 21 to move the first slide member 17 to the first
The guide member 18 can be smoothly slid in the left-right direction.

The drive unit 19 includes a motor 22 having a drive shaft 22a projecting upward, and a drive shaft 22a of the motor 22.
, An eccentric shaft 24 eccentrically projecting upward from the rotating plate 23, a base end pivotally connected to the eccentric shaft 24, and a distal end connected to a pair of left and right connecting members 15 of the support 2. And a swing arm 26 pivotally attached to one of them via a mounting piece 25.

Next, the front-rear moving mechanism 4 includes a pair of left and right first
A pair of left and right second slide members 27, 27 connected to the guide members 18, 18 and the drive unit 19, and a pair of left and right second guides for holding the pair of left and right second slide members 27, 27 slidably in the front-rear direction. Nuts 29, 29 provided on the second slide members 27, 27, and screws screwed to the nuts 29, 29 and rotatably pivoted to the second guide members 28, 28. Shafts 30 and 30. An L-shaped connecting plate 37 is attached to one of the first guide members 18 on the left and right sides.
22 are held in a mounting state.

The second guide member 28 has a rail portion 31 having a T-shaped cross section. The block-shaped second slide member 27 has a lower opening dovetail portion 32 slidably fitted to the rail portion 31 at a lower portion, and a screw hole 29a formed at an upper portion to form the nut portion 29. It has been. The pair of left and right second slide members 27, 27 are connected by a connecting rod 33. A slide bearing is provided between the rail 31 and the dovetail 32, for example.

The second guide member 28 has, at its front end and rear end, a pair of mounting pieces 34, 34 protruding upward from the rail 31. The front and rear ends of the screw shaft 30 are rotatably pivoted to 34. Also, at the rear end of the screw shaft 30, a handle
35 are installed.

As shown in FIGS. 2 and 5, by rotating the left and right handles 35, 35 and the screw shafts 30, 30, the second left and right slide members 27, 27 move in the front-rear direction. That is, the reciprocating drive means 3, the support portion 2, and the chamber body 1 move integrally in the direction of approaching / separating from the printing plate cylinder Y to adjust the mutual distance between the printing plate cylinder Y and the chamber body 1. Can be. Therefore, it is possible to cope with gravure printing plate cylinders Y having various diameters regardless of the size of the outer diameter.

Further, the ink chamber device of the present invention comprises:
In the printing operation, first, as shown in FIGS. 1 and 2, the handles 35 of the front-rear movement mechanism 4 are operated to operate the chamber body 1.
Is moved toward the printing plate cylinder Y to bring the blade edges of the pair of doctor blades 8 and 8 close to the plate surface of the printing plate cylinder Y, and the end seal members 11 and 11 are brought into close contact with the plate surface.

In addition to supplying and circulating the ink from the external ink supply device into the ink reservoir 7 of the chamber main body 1, the printing plate cylinder Y is rotated (in the direction of arrow A) to produce the ink in FIGS. 1, 2 and 4. As shown in FIG.
Drive. Then, the rotating plate 23 rotates and the swing arm
The tip of 26 reciprocates a small dimension in the left-right direction, and accordingly, the support 2 and the chamber body 1 reciprocate a small dimension in the left-right direction. That is, the chamber body 1 reciprocates in the left-right axial direction on the plate surface of the rotating printing plate cylinder Y.

Then, the ink supplied into the ink reservoir 7 of the chamber body 1 adheres to the plate surface of the printing plate cylinder Y, and excess ink adhered to the plate surface is scraped off by the doctor blade 8, and the printing material side is removed. The ink on the printing plate rotated and moved in contact with the printing medium is transferred.

At this time, the ink is transferred to the plate surface of the printing plate cylinder Y while the chamber body 1 reciprocates in the left-right axis direction with respect to the rotating printing plate cylinder Y. It is possible to prevent foreign matters in the ink and paper powder from adhering. Further, even if foreign matter or the like adheres to the blade edge of the doctor blade 8, it can be removed immediately. by this,
The so-called doctor streak is not formed on the printed matter.

The stroke (distance) S in which the chamber body 1 moves in the left-right axial direction with respect to the printing plate cylinder Y is:
It is set to 5 mm to 20 mm, preferably about 10 mm. If the stroke S is less than 5 mm, the moving distance is too short to remove foreign substances and the like adhering to the doctor blade 8. If the stroke S exceeds 20 mm, the reciprocating drive means 3 becomes large and the printing plate cylinder becomes large. The effective area of the Y plate becomes small. At this time, the chamber body 1
The time required for the reciprocating movement is changed depending on the rotation speed of the gravure printing plate cylinder, but is suitably within several seconds, and the time can be finely adjusted by making the rotation speed of the motor 22 of the reciprocating drive means 3 variable. It is assumed.

FIG. 6 shows another embodiment of the ink chamber apparatus according to the present invention, in which the inclination angle of the downstream blade 8 of the pair of doctor blades 8 can be freely changed. It was done. The “downstream side” refers to the rotation of the printing plate cylinder Y in FIG.
When the blades 8 and 8 approach from the right side, the upper one corresponds. In other words, it refers to the side that comes into contact with one point on the surface of the printing plate cylinder Y later.

That is, the downstream side wall (front opening 6) of the chamber main body 1 to which the downstream doctor blade 8 is attached.
At the upper edge), a holding member 39 for holding the downstream blade 8 is provided, and the holding member 39 is
It is designed to be removably attached to. Also, a holding member
39 (a) are provided to make the blade 8 freely changeable to different inclination angles.
As shown in (d), the angle at which the downstream blade 8 contacts the printing plate cylinder Y can be changed in a plurality of steps from an acute angle to an obtuse angle. Reference numeral 40 denotes a bolt member for fixing the blade 8 to the holding member 39.

[0029]

Since the present invention is configured as described above, the following effects can be obtained.

In the printing operation (according to claim 1),
Chamber body 1 for rotating gravure printing plate cylinder Y
Is configured to transfer the ink to the plate surface of the printing plate cylinder Y while reciprocatingly sliding in the left-right axis direction, so that it is possible to prevent foreign matter in the ink, paper dust, and the like from adhering to the blade edge of the doctor blade 8. . Further, even if foreign matter or the like adheres to the blade edge of the doctor blade 8, it can be removed immediately. Therefore, a so-called doctor streak is not formed on the printed matter, and the quality of the printed matter is stabilized.

According to the second aspect of the present invention, the reciprocating drive unit 3, the support unit 2, and the chamber body 1 are integrally moved by the forward / backward moving mechanism 4 in a direction to approach / separate from the printing plate cylinder Y. The distance between the printing plate cylinder Y and the chamber body 1 can be adjusted. Accordingly, gravure printing plate cylinders Y of various diameters regardless of the size of the outer diameter dimension, for example, gravure printing plate cylinders Y having an outer diameter dimension of about 125 mm to 250 mm.
Can be handled.

In the printing operation (according to claim 3),
Chamber body 1 for rotating gravure printing plate cylinder Y
Is configured to transfer the ink to the plate surface of the printing plate cylinder Y while reciprocatingly sliding in the left-right axis direction, so that it is possible to prevent foreign matter in the ink, paper dust, and the like from adhering to the blade edge of the doctor blade 8. . Further, even if foreign matter or the like adheres to the blade edge of the doctor blade 8, it can be removed immediately. Therefore, a so-called doctor streak is not formed on the printed matter, and the quality of the printed matter is stabilized.

Further, the reciprocating drive means 3, the support portion 2, and the chamber body 1 are integrally moved by the front-rear movement mechanism 4 in the direction of approaching / separating from the gravure printing plate cylinder Y.
The distance between the printing plate cylinder Y and the chamber body 1 can be adjusted. Accordingly, it is possible to cope with printing plate cylinders Y having various diameters regardless of the size of the outer diameter. In addition, since the structure is relatively simple, fabrication is easy.

The contact angle between the downstream doctor blade 8 and the printing plate cylinder Y can be changed. Thereby, the degree of ironing of the doctor blade 8 with respect to the surface of the printing plate cylinder Y can be adjusted to an appropriate strength. Therefore, the surface of the printing plate cylinder Y can be more reliably prevented from being damaged, and the amount of ink transferred from the chamber main body 1 to the printing plate cylinder Y can be adjusted.

[Brief description of the drawings]

FIG. 1 is a partially sectional rear view showing an embodiment of an ink chamber device of the present invention.

FIG. 2 is a sectional side view.

FIG. 3 is a perspective view showing a chamber main body.

FIG. 4 is an operation explanatory view showing a reciprocating operation of the chamber main body.

FIG. 5 is an explanatory diagram showing a state in which the chamber body moves in the front-rear direction.

FIG. 6 is an explanatory diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chamber main body 2 Support part 3 Reciprocating drive means 4 Front-back movement mechanism 6 Front opening part 7 Ink reservoir 8 Doctor blade 14 Support rod 15 Connecting member 17 First slide member 18 First guide member 19 Drive part 27 Second slide member 28 2nd guide member 29 nut part 30 screw shaft Y printing plate cylinder

Claims (4)

[Claims] 1. An ink reservoir chamber 7 to which ink is supplied from an external ink supply means, a front opening 6 opening to the printing plate cylinder Y side, and an outwardly projecting shape formed at an opening edge of the front opening 6. And a pair of doctor blades 8, 8 provided as
In the ink chamber apparatus provided with the chamber main body 1 which transfers to the plate surface, a support portion 2 for supporting the chamber main body 1 is provided, and a reciprocating drive means 3 for reciprocating the support portion 2 by a small dimension is provided. An ink chamber device wherein the chamber body 1 is reciprocated in a small dimension in the left-right axial direction with respect to the printing plate cylinder Y. 2. A back-and-forth moving mechanism 4 for integrally moving the chamber main body 1, the supporting portion 2 and the reciprocating drive means 3 in a direction approaching / separating from the printing plate cylinder Y. Ink chamber device. 3. An ink reservoir chamber 7 to which ink is supplied from an external ink supply means, a front opening 6 opening to the printing plate cylinder Y side, and an outwardly projecting shape formed at an opening edge of the front opening 6. And a pair of doctor blades 8, 8 provided as
In the ink chamber apparatus provided with the chamber main body 1 which is transferred to the plate surface, a support rod 14 attached to the back side of the chamber main body 1 in the left-right direction, and vertically suspended from both left and right ends of the support rod 14. A supporting portion 2 having a pair of left and right connecting members 15 and 15 is provided, and
A pair of left and right first slide members 1 provided at the lower ends of 5, 15
7, 17; a pair of left and right first guide members 18, 18 for holding the pair of left and right first slide members 17, 17 so as to be slidable in the left and right direction; And a reciprocating drive unit 3 having a drive unit 19, and a pair of left and right first guide members 18, 18 and a drive unit 19.
A pair of left and right second slide members 27, 27 connected to the left and right, and a pair of left and right second guide members 28, 28 for holding the pair of left and right second slide members 27, 27 slidably in the front-rear direction;
The front-rear movement mechanism 4 includes a nut portion 29 provided on the second slide member 27, and a screw shaft 30 screwed to the nut portion 29 and rotatably pivoted to the second guide member 28. An ink chamber device characterized by being provided. 4. An ink chamber device wherein the inclination angle of the downstream blade 8 of the pair of doctor blades 8, 8 can be changed freely.