JP2020163610A - Plate cylinder for sleeve printing plate, method for fixing printing plate and printer for can - Google Patents

Abstract

To provide a plate cylinder for a sleeve printing plate capable of: securely fixing the sleeve printing plate without using high pressure air; improving positional accuracy of the sleeve printing plate; and performing printing with high precision.SOLUTION: A plate cylinder for a sleeve printing plate, printing plate has a cylindrical surface extending along an axis line, onto which cylindrical surface the cylinder-shaped sleeve printing plate is detachably attached, The plate cylinder for the sleeve printing plate comprises: a cylinder plate body; a concave part recessed radially inward formed on an outer periphery of the cylinder plate body; and fixing members 20 received by the concave part and radially protruding/retreating. Positioning pins 15 for determining a position of the sleeve printing plate is arranged at a center part in a circumferential direction of the fixing member 20 so as to extend in a radial direction of the cylinder plate body, while being provided independently of the fixing member 20.SELECTED DRAWING: Figure 4

Description

The present invention has a cylindrical surface extending along an axis, and a sleeve printing plate having a cylindrical shape is detachably attached to the cylindrical surface. A sleeve printing plate is attached to the sleeve printing plate cylinder. The present invention relates to a method for fixing a sleeve printing plate, and a can printing apparatus provided with a plate cylinder for the sleeve printing plate.

The above-mentioned cylindrical printing plate (hereinafter referred to as sleeve printing plate) is used for various types of printing. This sleeve printing plate is fixed so as to be in close contact with the outer peripheral surface of the plate cylinder by inserting it into the plate cylinder, for example, as in Patent Document 1. Here, the conventional plate cylinder is formed in a substantially cylindrical shape having a hollow air chamber, and has an air supply hole penetrating into the air chamber from its axial end face and an air blowout penetrating into the air chamber from its outer peripheral surface. It is constructed by forming a hole.

In this plate cylinder, when air is introduced into the air chamber through the air supply hole to increase the pressure in the air chamber, high-pressure air is blown out from the air outlet hole as the pressure rises.
Here, when the sleeve printing plate is attached to or detached from the plate cylinder, high-pressure air is blown out from the air outlet hole while the sleeve printing plate is attached to the outer peripheral surface of the plate cylinder so as to close the air outlet hole. The inner peripheral hole of the printing plate is enlarged, and the sleeve printing plate is attached and detached.

However, in the plate cylinder using high pressure air as described above, depending on the material and thickness of the sleeve printing plate, the sleeve printing plate cannot be sufficiently expanded in diameter even by high pressure air, and the sleeve printing plate can be easily attached and detached. There was a risk that it could not be done.
Further, since a high-pressure air supply mechanism is required, there is a possibility that the equipment configuration for mounting the sleeve printing plate becomes complicated.

Here, in Patent Documents 2 and 3, fixing provided on a part of the outer peripheral surface of the plate cylinder as a method of fixing the flat plate-shaped printing plate to the plate cylinder in a state of being bent along the outer peripheral surface of the plate cylinder. A technique for fixing the printing plate by projecting the member outward in the radial direction has been proposed.

Japanese Unexamined Patent Publication No. 2006-272682 Special Fair 01-055107 Japanese Unexamined Patent Publication No. 2012-091389

By the way, in References 2 and 3, the flat plate-shaped printing plate is fixed to the plate cylinder in a state of being bent along the outer peripheral surface of the plate cylinder, and it is assumed that the sleeve printing plate having a cylindrical shape is fixed. I didn't.
Here, in the sleeve printing plate, an image portion is formed on the outer peripheral surface of the sleeve body having a cylindrical shape, and as disclosed in References 2 and 3, the sleeve printing plate is pressed from the inner peripheral side by a fixing member. When pressed, the image portion is distorted and there is a risk that printing cannot be performed with high accuracy.
Further, in the sleeve printing plate, if the fixing is insufficient, the sleeve printing plate may move in the circumferential direction and the axial direction, and the position accuracy may be insufficient.

The present invention has been made in view of the above circumstances, and the sleeve printing plate can be reliably fixed without using high-pressure air, and the position accuracy of the sleeve printing plate can be improved. It is an object of the present invention to provide a plate cylinder for a sleeve printing plate capable of printing well, a method for fixing a sleeve printing plate, and a can printing apparatus provided with the plate cylinder for a sleeve printing plate.

In order to solve the above-mentioned problems, the sleeve printing plate cylinder according to the present invention has a cylindrical surface extending along an axis, and a sleeve having a cylindrical shape is detachably attached to the cylindrical surface. It is a printing plate cylinder, and has a plate cylinder main body, a concave portion formed on the outer peripheral surface of the plate cylinder main body, which is recessed inward in the radial direction, and is accommodated in the concave portion and appears and disappears in the radial direction. A positioning pin having a fixing member and a positioning pin for determining the position of the sleeve printing plate is arranged so as to extend in the radial direction of the plate cylinder body at the central portion in the circumferential direction of the fixing member. , The feature is that it is provided independently of the fixing member.

According to the plate cylinder for the sleeve printing plate having this configuration, the positioning pin for determining the position of the sleeve printing plate extends in the radial direction of the plate cylinder body at the central portion in the circumferential direction of the fixing member. Since it is arranged and provided independently of the fixing member, the sleeve printing plate can be formed by projecting the fixing member outward in the radial direction while the position of the sleeve printing plate is determined by the positioning pin. It can be fixed and the position accuracy of the sleeve printing plate can be improved. Therefore, it is possible to print with high accuracy.

Here, in the plate cylinder for a sleeve printing plate of the present invention, the frictional force with the sleeve printing plate is greater on the surface of the fixing member facing outward in the radial direction than on the outer peripheral surface of the plate cylinder body. It is preferable that the anti-slip means is formed.
In this case, the anti-slip means is formed on the surface of the fixing member that faces outward in the radial direction, and the frictional force of the surface of the fixing member that faces outward in the radial direction with the sleeve printing plate is the main body of the plate body. Since it is configured to be larger than the outer peripheral surface of the above, it is possible to prevent slippage between the sleeve printing plate and the fixing member when the fixing member is projected, and the sleeve printing plate is fixed more firmly. It becomes possible to do.

Further, in the plate cylinder for a sleeve printing plate of the present invention, a plurality of the fixing members may be arranged, and the positioning pin may be arranged on one of the plurality of the fixing members.
In this case, since a plurality of the fixing members are arranged, the sleeve printing plate can be firmly fixed. Since the positioning pin is arranged on one of the plurality of fixing members, the sleeve printing plate can be reliably positioned.

The method for fixing the sleeve printing plate of the present invention is a method for fixing the sleeve printing plate having a cylindrical shape to the above-mentioned plate cylinder for the sleeve printing plate, and the sleeve printing plate is positioned on the sleeve printing plate. A positioning notch that engages with the pin is formed, and the sleeve printing plate is mounted in a state where the fixing member is retracted inward in the radial direction, and the positioning pin is engaged with the positioning notch. The sleeve printing plate is fixed by being combined and projecting the fixing member outward in the radial direction.

According to the method of fixing the sleeve printing plate having this configuration, the sleeve printing plate is mounted in a state where the fixing member is retracted inward in the radial direction, and the positioning pin is engaged with the positioning notch. Since the sleeve printing plate is fixed by projecting the fixing member outward in the radial direction, the sleeve printing plate can be fixed by the fixing member in a state of being accurately positioned. .. Therefore, the sleeve printing plate can be reliably positioned, and printing can be performed with high accuracy.

The can printing device of the present invention is a can printing device that prints an image pattern formed on the outer peripheral surface of a sleeve printing plate having a cylindrical shape on a can body, and the sleeve printing plate is the sleeve printing plate described above. It is characterized by being attached to the plate cylinder.
According to the can printing apparatus having such a configuration, the sleeve printing plate and the plate cylinder for the sleeve printing plate are firmly fixed, and the sleeve printing plate can be arranged with high positional accuracy, so that stable printing can be performed. You can work.

According to the present invention, the sleeve printing plate can be reliably fixed without using high-pressure air, the position accuracy of the sleeve printing plate can be improved, and printing can be performed with high accuracy. It is possible to provide a plate cylinder, a method for fixing a sleeve printing plate, and a can printing apparatus provided with the sleeve printing plate cylinder.

It is explanatory drawing which shows an example of the sleeve printing plate used in this embodiment. It is a schematic explanatory drawing of the plate cylinder for a sleeve printing plate which is one Embodiment of this invention. (A) is a front view, and (b) is a cross-sectional view along an axis. It is explanatory drawing of the plate cylinder main body in this embodiment. It is explanatory drawing which shows the arrangement position of the fixing member and the positioning pin in this embodiment. (A) is a front view and (b) is a top view. It is explanatory drawing which shows the state which the fixing member in this embodiment is housed in a recess. It is the schematic explanatory drawing of the printing apparatus of the can provided with the plate cylinder for a sleeve printing plate which is this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
First, the sleeve printing plate 30 used in the present embodiment will be described with reference to FIG.

As shown in FIG. 1, the sleeve printing plate 30 is arranged on a cylindrical sleeve body 31 extending along the axis L and an outer peripheral surface of the sleeve body 31 to form an image pattern printed on a can. The image unit 33 is provided.
A positioning notch 35 is formed at one end side (upper right side in FIG. 1) of the sleeve printing plate 30 in the L direction of the axis.

The sleeve body 31 is made of, for example, resin, fiber reinforced plastic (FRP), metal, or the like, and in the present embodiment, it is made of nickel (Ni).

The image unit 33 is formed by forming an image pattern on a plate material made of a photosensitive resin capable of engraving with laser light by etching or laser processing, and is a so-called letterpress.
In the present embodiment, the two image units 33, 33 are arranged at positions facing each other (180 ° facing positions) with the axis L interposed therebetween.

Here, since the sleeve printing plate 30 in the present embodiment is made of a metal such as nickel as described above, the diameter cannot be sufficiently expanded by high pressure air.
Therefore, the sleeve printing plate 30 is used by being mounted on the sleeve printing plate cylinder 10 according to the present embodiment.

Next, the sleeve printing plate cylinder 10 according to the present embodiment will be described with reference to FIGS. 2 to 5.
As shown in FIGS. 2A and 2B, the sleeve printing plate cylinder 10 includes a plate cylinder main body 11 having a substantially cylindrical shape. The plate cylinder main body 11 is provided with an inner peripheral hole 12 into which a rotation drive shaft (not shown) of the printing device is inserted. In the present embodiment, the inner peripheral hole 12 is a tapered hole whose diameter gradually decreases toward the tip side in the axis O direction (left side in FIG. 2B), and the tip of the rotary drive shaft is also the tip side in the axis O direction (the tip side in the axis O direction (). It is a tapered shaft that gradually shrinks in diameter toward the left side in FIG. By taper fitting the inner peripheral hole 12 and the rotation drive shaft in this way, the relative position of the plate cylinder main body 11 and the rotation drive shaft in the axis O direction is determined.

A plurality of recesses 18 that are recessed inward in the radial direction are formed on the outer peripheral surface of the plate body 11. These plurality of recesses 18 are arranged at equal intervals in the circumferential direction of the plate cylinder main body 11, and in the present embodiment, as shown in FIGS. 2A and 3, the two recesses 18 and 18 have the axis O. It is arranged at a position facing each other (180 ° facing position).
In the present embodiment, as shown in FIG. 3, the recess 18 extends in the axis O direction to reach the end surface of the plate cylinder main body 11, and is a groove that opens in a U shape outward in the radial direction. It is configured to have a shape.

A fixing member 20 that appears and disappears in the radial direction is housed in the recess 18. In the present embodiment, as described above, the two recesses 18 and 18 are formed, and the fixing members 20 are housed in the two recesses 18 and 18, respectively.
As shown in FIG. 4, the fixing member 20 has a curved surface shape in which the surface 21 of the plate body 11 facing outward in the radial direction has the same radius of curvature as the radius of curvature of the plate body 11. In a state where the fixing member 20 projects most radially outward, the outer peripheral surface of the plate body 11 and the surface 21 of the fixing member 20 facing outward in the radial direction are smoothly connected to form a cylindrical surface. Become.
Further, in the state where the fixing member 20 is most retracted inward in the radial direction, the surface 21 of the fixing member 20 facing outward in the radial direction is located radially inward from the radial outer end of the recess 18. It will be placed.

As shown in FIGS. 4 and 5, the fixing member 20 is formed with an insertion groove 22 and a receiving surface portion 23, and the eccentric gear 25 is inserted into the insertion groove 22 and the radial direction of the receiving surface portion 23 is changed. An urging member (spring member) 26 that urges the fixing member 20 inward in the radial direction is in contact with the facing surface.
Here, as shown in FIGS. 2A and 5, the fixing member 20 is configured to project outward in the radial direction by rotating the eccentric gear 25. That is, when the eccentric gear 25 rotates and its thick portion is positioned outward in the radial direction, the fixing member 20 projects outward in the radial direction.
Further, when the eccentric gear 25 is rotated and the thin portion thereof is positioned outward in the radial direction, the fixing member 20 is moved inward in the radial direction by the urging force of the above-mentioned urging member (spring member) 26. It will move.

Then, in the sleeve printing plate cylinder 10 according to the present embodiment, a plurality of (two in the present embodiment) fixing members 20 are configured to project in the radial direction outward in synchronization with each other. There is.
In the present embodiment, as shown in FIG. 2, a main body gear 27 that rotates about the axis of the plate body main body 11 is provided, and the main body gear 27 is arranged on each fixing member 20. It is geared to. As the main body gear 27 rotates, the eccentric gears 25 and 25 arranged on the plurality of fixing members 20 and 20 rotate in synchronization, and the plurality of fixing members 20 and 20 are synchronously out of the radial direction. It has a structure that overhangs toward you.
When the eccentric gears 25 and 25 are rotated in synchronization, the main body gear 27 itself may be rotated, or by rotating one eccentric gear 25, the main body gear 27 and the other eccentric gear 25 may be rotated. May be configured to rotate.

In the present embodiment, the main body gear 27 is partially formed with gear teeth in a region to be meshed with the eccentric gear 25. In the present embodiment, a regulation groove 28 for regulating the rotational movement range of the main body gear 27 is formed so that the gear teeth of the main body gear 27 are maintained in mesh with the eccentric gear 25, and the regulation groove 28 is restricted. The pin 29 is inserted.

Further, in the present embodiment, the surface 21 of the fixing member 20 facing outward in the radial direction is provided with anti-slip means so that the frictional force with the sleeve printing plate 30 is larger than that of the outer peripheral surface of the plate body 11. It is formed.
In the present embodiment, the non-slip means is a rough surface portion, and the ten-point average roughness R _Zjis (JIS B 0601-2001) of the rough surface portion is 10 μm or less. The ten-point average roughness R _Zjis of the rough surface portion is preferably in the range of 2 μm or more and 5 μm or less.

Then, in the present embodiment, the plate cylinder main body 11 is provided with a positioning pin 15 for positioning the sleeve printing plate 30 to be fixed. In the present embodiment, the positioning pin 15 is detachable and is configured to be arranged by inserting it into a mounting hole formed in the plate body 11.
Then, as shown in FIG. 4B, the positioning pin 15 is configured to be located at the central portion in the circumferential direction of the recess 18 (fixing member 20). Further, the positioning pin 15 is provided independently of the fixing member 20. The positioning pin 15 is configured not to move even if the fixing member 20 moves in the radial direction.
As shown in FIG. 4B, the fixing member 20 is formed with a notch 24 in a region where the positioning pin 15 is located.

In the present embodiment, mounting holes into which the positioning pin 15 can be inserted are formed in a plurality of recesses 18 (plurality of fixing members 20), one of which is selected and the positioning pin 15 is inserted. It is said that. That is, in the present embodiment, one positioning pin 15 is erected, and the erection position of the positioning pin 15 can be selected.

Next, a method of fixing the sleeve printing plate 30 to the sleeve printing plate cylinder 10 according to the present embodiment will be described.
First, in the sleeve printing plate cylinder 10, the fixing member 20 is retracted inward in the radial direction. At this time, as described above, the surface of the fixing member 20 facing outward in the radial direction is arranged so as to be located inward in the radial direction from the radial outer end of the recess 18.

When the sleeve printing plate cylinder 10 (plate cylinder body 11) is viewed from the axis O direction and the radial outer ends of the recess 18 are connected by a straight line in a state where the fixing member 20 is retracted inward in the radial direction. The outer peripheral length of the sleeve printing plate 30 is shorter than the inner peripheral length of the sleeve printing plate 30.
As a result, in the state where the fixing member 20 is retracted inward in the radial direction, the sleeve printing plate 30 is mounted on the sleeve printing plate cylinder 10 (plate cylinder body 11) without expanding the diameter of the sleeve printing plate 30. be able to.

Then, the positioning pin 15 is inserted into the mounting hole of the plate body 11, and the positioning notch 35 of the sleeve printing plate 30 is engaged with the positioning pin 15 described above to position the sleeve printing plate 30.
At this time, the two image portions 33, 33 arranged at 180 ° intervals in the sleeve printing plate 30 are arranged so as to be 90 ° spaced from the two fixing members 20, 20 (recesses 18, 18). Will be done.

Next, one eccentric gear 25 arranged on one fixing member 20 is rotated. Then, the main body gear 27 meshed with one eccentric gear 25 rotates about the axis O, and the other eccentric gear 25 arranged on the other fixing member 20 also rotates. As a result, the two fixing members 20, 20 arranged at 180 ° intervals are synchronously overhanging outward in the radial direction to form a cylindrical surface. That is, the two fixing members 20, 20 are configured to project in a direction orthogonal to the image units 33, 33.
Here, at this time, the outer peripheral length of the cylindrical surface formed by the fixing member 20 projecting outward in the radial direction is larger than the inner peripheral length of the sleeve printing plate 30, and the sleeve printing plate 30 is firmly fixed. Will be done.

Next, the can printing apparatus 50 provided with the sleeve printing plate cylinder 10 according to the present embodiment will be described. The outline of the can printing apparatus is shown in FIG.
The can printing device 50 is roughly composed of an ink adhesion mechanism 51 and a can moving mechanism 55.

The ink adhesion mechanism 51 transfers ink from a plurality of inker units 60 that supply ink of each color, and after copying the ink from these inker units 60, contacts the outer peripheral surface of the can body 71 to print (adhere) the ink. It is composed of a blanket wheel 52.
Although five inker units 60 are shown in FIG. 6, the inker units are provided according to the number of inks used.

The inker unit 60 is connected to an ink source 61, a ducting roll 62 that comes into contact with the ink source 61 to receive ink, an intermediate roll 63 composed of a plurality of rolls connected to the ducting roll 62, and the intermediate roll 63. It is composed of an ink adhering roll 64 and a printing plate cylinder 40 connected to the ink adhering roll 64. Here, the printing plate cylinder 40 is configured by fixing the sleeve printing plate 30 to the sleeve printing plate cylinder 10 according to the present embodiment.
A plurality of printing blankets 53 are provided on the outer peripheral surface of the blanket wheel 52. The printing blanket 53 is configured to come into contact with the image portion 33 formed on the outer peripheral surface of the printing plate cylinder 40 and also with the can cylinder 71.

The can moving mechanism 55 sequentially connects a can shooter 56 that takes in the can body 71, a mandrel 57 that rotatably holds the can body 71 supplied from the can body 71, and a can body 71 attached to the mandrel 57. It is composed of a mandrel turret 58 that is rotationally moved to the ink adhesion mechanism 51 side.

In the can printing apparatus 50 having such a configuration, inks of different colors are discharged from the ink source 61 of each inker unit 60 via the ducting roll 62, the intermediate roll 63, and the ink adhesion roll 64. The inks of each color are attached to the image unit 33 arranged on the outer peripheral surface of the printing plate cylinder 40 as a pattern on the printing blanket 53 on the rotating blanket wheel 52, and this pattern is held on the mandrel 57. Printing is performed while contacting the printed can body 71.

According to the sleeve printing plate plate cylinder 10 according to the present embodiment having the above configuration, the positioning pin 15 for determining the position of the sleeve printing plate 30 is located at the central portion of the fixing member 20 in the circumferential direction. Since the fixing member 20 is arranged so as to extend in the radial direction of the 11 and is provided independently of the fixing member 20, the fixing member 20 is in a state where the position of the sleeve printing plate 30 is determined by the positioning pin 15. The sleeve printing plate 30 can be fixed by projecting outward in the radial direction, and the positioning accuracy of the sleeve printing plate 30 can be improved. Therefore, it is possible to print with high accuracy.

Further, in the present embodiment, in the present embodiment, the anti-slip means is formed on the surface 21 of the fixing member 20 facing outward in the radial direction, and the sleeve of the surface 21 of the fixing member 20 facing outward in the radial direction is formed. Since the frictional force with the printing plate 30 is configured to be larger than the outer peripheral surface of the plate cylinder body 11, when the fixing member 20 is projected, it slides between the sleeve printing plate 30 and the fixing member 20. Can be suppressed, and the sleeve printing plate 30 can be more firmly fixed.
In the present embodiment, since the image unit 33 is arranged in the direction orthogonal to the fixing member 20, the image unit 33 formed on the sleeve printing plate 30 is distorted when the fixing member 20 is projected. This can be further suppressed, and printing can be performed with higher accuracy.

Further, in the present embodiment, since a plurality of fixing members 20 (two in the present embodiment) are arranged, the sleeve printing plate 30 can be firmly fixed. Since the positioning pin 15 is arranged in one of the plurality of fixing members 20, the sleeve printing plate 30 is formed by engaging the positioning pin 15 with the positioning notch 35 of the sleeve printing plate 30. It is possible to perform reliable positioning.

Further, in the present embodiment, mounting holes into which the positioning pin 15 can be inserted are formed in each of the plurality of recesses 18 (plurality of fixing members 20), one of which is selected, and the positioning pin 15 is inserted. Therefore, the sleeve printing plate 30 and the plate cylinder main body 11 can be fixed by changing the relative positions in the circumferential direction.
For example, when the mounting holes are formed at the positions of the two fixing members 20 as in the present embodiment, the sleeve printing plate 30 can be transferred to the two image portions 33 by changing the positions of the positioning pins 15. , 33 can be fixed to the plate cylinder main body 11 at a position rotated by 180 °.

Further, in the present embodiment, since the cylindrical surface is formed in a state where the fixing member 20 projects most radially outward, the fixing member 20 is retracted inward in the radial direction. The sleeve printing plate 30 can be attached to the plate cylinder main body 11, and the sleeve printing plate 30 can be firmly fixed by setting the fixing member 20 to protrude most radially outward.

Further, in the present embodiment, since the plurality of fixing members 20, 20 are synchronously extended outward in the radial direction, when the fixing members 20, 20 are extended, the sleeve printing plate 30 Since pressure is applied to the inner peripheral holes in a well-balanced manner, distortion is less likely to occur in the image portion 33 formed on the sleeve printing plate 30, and printing can be performed with high accuracy.

Further, according to the method of fixing the sleeve printing plate 30 of the present embodiment, the sleeve printing plate 30 is mounted in a state where the fixing member 20 is retracted inward in the radial direction, and the sleeve printing plate 30 is fitted in the positioning notch 35 of the sleeve printing plate 30. The sleeve printing plate 30 is fixed by engaging the positioning pin 15 to position the sleeve printing plate 30 and then projecting the fixing member 20 outward in the radial direction. The printing plate 30 can be fixed in a state of being accurately positioned, and printing can be performed with high accuracy.

Further, in the present embodiment, since the two fixing members 20 and 20 are configured to project in the direction orthogonal to the image portions 33 and 33, the fixing member 20 is used to fix the sleeve printing plate 30. Even if 20 and 20 are projected outward in the radial direction, pressure is applied to the inner peripheral holes of the sleeve printing plate 30 in a well-balanced manner, so that the image portion 33 of the sleeve printing plate 30 is less likely to be distorted, and printing can be performed with high accuracy. It will be possible.

Further, according to the can printing apparatus 50 of the present embodiment, the sleeve printing plate 30 and the sleeve printing plate cylinder 10 are firmly fixed, and the sleeve printing plate 30 is arranged and fixed with high positional accuracy. It is possible to perform accurate and stable printing work.

Although the embodiments of the present invention have been described above, the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the invention.
For example, in the present embodiment, the description has been made assuming that two recesses and fixing members are arranged, but the present invention is not limited to this, and one recess and fixing members may be arranged. However, it may be one in which three or more recesses and fixing members are arranged.

Further, in the present embodiment, the sleeve printing plate in which two image portions are arranged has been described, but the present invention is not limited to this, and one image portion may be arranged. It may be the one in which three or more image parts are arranged.
Further, in the present embodiment, the sleeve main body of the sleeve printing plate is described as being made of nickel (Ni), but it may be made of another material.

10 Plate cylinder for sleeve printing plate 11 Plate cylinder body 15 Positioning pin 18 Recess 20 Fixing member 30 Sleeve printing plate 33 Image part 35 Positioning notch part 50 Can printing device

Claims (5)

A plate cylinder for a sleeve printing plate that has a cylindrical surface extending along an axis and a sleeve printing plate having a cylindrical shape can be detachably attached to the cylindrical surface.
It has a plate body, a concave portion formed on the outer peripheral surface of the plate body, which is recessed inward in the radial direction, and a fixing member which is accommodated in the concave portion and appears and disappears in the radial direction.
The positioning pin that determines the position of the sleeve printing plate is arranged so as to extend in the radial direction of the plate cylinder body at the central portion in the circumferential direction of the fixing member, and is independent of the fixing member. A plate cylinder for a sleeve printing plate, which is characterized by being provided. A non-slip means is formed on the surface of the fixing member facing outward in the radial direction so that the frictional force with the sleeve printing plate is larger than that of the outer peripheral surface of the plate body. The plate cylinder for the sleeve printing plate according to claim 1. The sleeve printing plate plate according to claim 1 or 2, wherein a plurality of the fixing members are arranged, and the positioning pin is arranged in one of the plurality of the fixing members. Body. A method for fixing a sleeve printing plate, wherein the sleeve printing plate having a cylindrical shape is fixed to the sleeve printing plate cylinder according to any one of claims 1 to 3.
The sleeve printing plate is formed with a positioning notch that engages with the positioning pin.
With the fixing member retracted inward in the radial direction, the sleeve printing plate is attached, and the positioning pin is engaged with the positioning notch.
A method for fixing a sleeve printing plate, characterized in that the sleeve printing plate is fixed by projecting the fixing member outward in the radial direction. A can printing device that prints an image pattern formed on the outer peripheral surface of a sleeve printing plate having a cylindrical shape on a can body.
A can printing apparatus, wherein the sleeve printing plate is mounted on a sleeve printing plate cylinder according to any one of claims 1 to 3.

Images