JPWO2011077944A1 - Sleeve printing plate cylinder, method of using sleeve printing plate cylinder and can printing device - Google Patents

Abstract

A sleeve printing plate cylinder having a cylindrical surface extending along an axis, and a sleeve printing plate having a cylindrical shape detachably attached to the cylindrical surface, wherein the sleeve printing plate is attached, An anti-slip portion is formed that contacts at least one of the inner peripheral surface and the end surface of the sleeve printing plate and increases the frictional force with the sleeve printing plate.

Description

The present invention relates to a sleeve printing plate cylinder to which a cylindrical sleeve printing plate is mounted, a method of using the sleeve printing plate cylinder, and a printing apparatus for a can equipped with the sleeve printing plate cylinder. is there.
This application claims priority based on Japanese Patent Application No. 2009-291765 for which it applied to Japan on December 24, 2009, and uses the content here.

The sleeve printing plate is generally composed of a fiber reinforced plastic (FRP) sleeve support and a plate body disposed on the outer peripheral surface of the sleeve support. The plate body is made of, for example, a photosensitive resin that can be engraved with laser light, and has an image pattern formed thereon.
Such a sleeve printing plate is widely used in the fields of flexographic printing and letterpress printing, as described in Patent Document 1, for example. Further, as described in Patent Document 2, this sleeve printing plate is also applied in the field of offset printing for cylindrical objects such as cans.

  This sleeve printing plate is used by being mounted on a cylindrical surface of a plate cylinder of a printing apparatus. In this sleeve printing plate, since the circumferential position of the image pattern is set in advance on the sleeve support, the image pattern can be registered by aligning the sleeve support and the plate cylinder. . Therefore, the time and labor required for the image pattern exchange work can be greatly reduced.

  In the sleeve printing plate described above, the inner diameter is slightly smaller than the outer diameter of the plate cylinder, and the sleeve printing plate is expanded by blowing air from the air holes provided in the cylindrical surface of the plate cylinder. It is made to fit on the cylindrical surface of the plate cylinder. In other words, the sleeve printing plate and the plate cylinder are fixed by the frictional force between the inner surface of the sleeve printing plate and the outer surface of the plate cylinder, which is generated by the contraction force of the expanded sleeve printing plate to restore the original inner diameter. ing.

In the above-described sleeve printing plate, it is necessary to fix the axial position and the circumferential position between the sleeve printing plate and the plate cylinder.
In Patent Document 3, a sleeve printing plate and a plate are formed by forming a positioning convex portion on the sleeve printing plate and forming a positioning member on the plate cylinder, and engaging the positioning convex portion with the positioning member. A technique is disclosed in which the relative position in the circumferential direction with respect to the barrel and the relative position in the axial direction are determined.

  Further, as shown in Patent Document 4, a notch portion opened toward the end in the axial direction is provided in a part of the sleeve printing plate, a guide pin is provided in the plate cylinder, and the notch portion is engaged with the guide pin. Thus, there is also provided a technique for determining the relative position in the circumferential direction and the relative position in the axial direction between the sleeve printing plate and the plate cylinder.

Incidentally, when the sleeve printing plate is actually used for printing, torque may be transmitted between the sleeve printing plate and the plate cylinder. That is, there may be a force that shifts the sleeve printing plate from the plate cylinder in the rotation direction.
If this torque is small, the frictional force between the inner surface of the sleeve printing plate and the outer surface of the plate cylinder can withstand the force shifted in the rotational direction. However, when the printing speed is increased or the printing pressure is increased in order to improve the printing quality, the torque becomes excessive, and the sleeve printing plate cannot be fixed only by the frictional force and starts to slide.

When positioning the sleeve printing plate and the plate cylinder using a guide pin, if the torque is excessive and the sleeve printing plate slips, the rotational torque is transferred via the guide pin of the plate cylinder. When the notch is pressed, it is transmitted to the sleeve printing plate. Then, an excessive load is applied to the notch, and the notch may be plastically deformed at an early stage. When the notch is plastically deformed, the sleeve printing plate cannot be accurately positioned, and the print quality is deteriorated. Then, even if the sleeve body of the sleeve printing plate is healthy, the sleeve printing plate is discarded, and the service life of the sleeve printing plate is significantly shortened.

As described in Patent Document 3, even when positioning the sleeve printing plate and the plate cylinder is performed using a positioning convex portion provided on the sleeve printing plate and a positioning member provided on the plate cylinder. Further, an excessive load is applied to the portion where the positioning convex portion is provided, so that the sleeve printing plate may be deformed.
Positioning using the guide pin and the positioning protrusion is performed at one end of the sleeve printing plate and the plate cylinder, so that the end side where the positioning is not performed moves in the circumferential direction, and the sleeve printing plate is twisted. There was a fear.

  In patent document 4, in order to suppress the plastic deformation of a notch part, the technique which reinforces a notch part is disclosed. However, since torque is transmitted using the notch for positioning, the positioning accuracy may be deteriorated, which is not preferable. In addition, there is a problem that the manufacturing cost of the sleeve printing plate increases to reinforce the notch.

The present invention has been made in consideration of such circumstances, and its purpose is to firmly fix the sleeve printing plate to prevent the occurrence of misalignment during printing, and to perform the printing operation stably. It is an object of the present invention to provide a sleeve printing plate cylinder, a method for using the sleeve printing plate cylinder, and a printing apparatus for a can equipped with the sleeve printing plate cylinder.

JP 2006-326938 A JP 2006-272682 A JP 2007-044987 A JP 2010-137505 A

  The sleeve printing plate cylinder of the present invention is a sleeve printing plate cylinder having a cylindrical surface extending along an axis, to which a sleeve printing plate having a cylindrical shape is detachably attached. In a state where the sleeve printing plate is attached, an anti-slip processing portion is formed which contacts at least one of the inner peripheral surface and the end surface of the sleeve printing plate and increases the frictional force with the sleeve printing plate. It is a feature.

  In the sleeve printing plate cylinder of the present invention having such a configuration, the sleeve printing plate is firmly fixed by the anti-slip processing portion, and the occurrence of misalignment during printing is prevented. Therefore, the printing operation can be performed stably. Further, since the rotational torque is transmitted to the sleeve printing plate by the anti-slip processing portion, an excessive load does not act on the notch portion of the sleeve printing plate. Therefore, deformation of the notch portion of the sleeve printing plate is suppressed, early deterioration of the sleeve printing plate is suppressed, and printing with high registration accuracy is possible.

The anti-slip portion may be formed on a part of the cylindrical surface that contacts the inner peripheral surface of the sleeve printing plate.
In this case, the anti-slip portion formed on a part of the cylindrical surface increases the frictional force with the inner peripheral surface of the sleeve printing plate, and the sleeve printing plate is firmly fixed.

The non-slip processing portion may be formed on an end surface abutting member that abuts at least one of the one end surface and the other end surface of the sleeve printing plate.
In this case, the frictional force between the sleeve printing plate and the inner peripheral surface of the sleeve printing plate by the non-slip processed portion formed on the end surface contact member that contacts at least one of the one end surface and the other end surface of the sleeve printing plate. And the sleeve printing plate is firmly fixed.

A plurality of the non-slip processed portions may be provided in the circumferential direction, and the plurality of the anti-slip processed portions may be arranged at equal intervals in the circumferential direction.
In this case, the rotational torque from the anti-slip processing portion acts evenly in the circumferential direction of the sleeve printing plate, and deformation of the sleeve printing plate can be suppressed. Further, it is possible to more reliably prevent the positional deviation during printing of the sleeve printing plate.

The non-slip processed portion is a rough surface portion formed by roughening the contact surface with the sleeve printing plate, and the ten-point average roughness Rzjis of the rough surface portion is 10 μm or more. May be.
For example, the rough surface portion is formed by performing a roughening process such as blasting on the contact surface with the sleeve printing plate. This rough surface portion has minute irregularities. By disposing the minute irregularities so as to bite into the contact surface with the sleeve printing plate, the friction coefficient is greatly increased between the sleeve printing plate and the rough surface portion, and the sleeve printing plate is firmly fixed.
Here, since the ten-point average roughness Rzjis of the rough surface portion is set to 10 μm or more, the sleeve printing plate can be firmly fixed by the frictional force. The ten-point average roughness Rzjis is specified in JIS B 0601: 2001.

The anti-slip portion may be a concavo-convex portion formed by performing concavo-convex processing on the contact surface with the sleeve printing plate.
For example, the concavo-convex portion is formed by performing concavo-convex processing such as knurling on the contact surface with the sleeve printing plate. By causing this uneven portion to bite into the sleeve printing plate, it is possible to reliably prevent positional deviation during printing of the sleeve printing plate.

When the anti-slip portion is formed on a part of the cylindrical surface and the anti-slip portion is an uneven portion, the uneven portion is recessed radially inward in the direction parallel to the axis. You may be comprised so that a recessed part and the convex part which protruded to radial direction outward may be arrange | positioned alternately.
In this case, the sleeve printing plate is disposed in the axial direction of the plate cylinder by alternately disposing concave portions that are recessed inward in the radial direction and convex portions that protrude outward in the radial direction in a direction parallel to the axis of the plate cylinder. It will be prevented from moving along.

The non-slip processing portion includes an end surface abutting member that abuts on one end surface of the sleeve printing plate, and the end surface abutting member presses the sleeve printing plate toward the other side in the axial direction. Also good.
In this case, the sleeve printing plate and the end surface abutting member are in close contact with each other, the coefficient of friction is greatly increased between the sleeve printing plate and the end surface abutting member, and the sleeve printing plate is firmly fixed.

The method for using the sleeve printing plate cylinder of the present invention is the above-described method for using the sleeve printing plate cylinder, wherein an image pattern used for printing is disposed on the outer peripheral surface of the sleeve printing plate. An image portion and a non-image portion not used for printing are formed, and the sleeve printing plate is mounted so that the anti-slip processing portion is disposed in the non-image portion.
According to the method of using the sleeve printing plate cylinder configured as described above, since the non-slip processed portion is arranged in the non-image portion, even if the anti-slip processed portion is bitten into the sleeve printing plate. The image portion used for printing is not deformed, and the printing operation can be performed stably.

The printing apparatus for a can of the present invention is a printing apparatus for a can that prints an image pattern formed on the outer peripheral surface of a cylindrical sleeve printing plate on a can body, and the sleeve printing plate is the sleeve printing plate described above. It is characterized by being mounted on a plate cylinder.
According to the printing apparatus for a can having this configuration, the sleeve printing plate and the plate cylinder are firmly fixed, so that the positional deviation during printing of the sleeve printing plate is prevented, and a stable printing operation can be performed.

  According to the present invention, a sleeve printing plate cylinder capable of firmly fixing a sleeve printing plate to prevent occurrence of misalignment during printing and stably performing a printing operation, and the sleeve printing plate It is possible to provide a method of using a cylinder and a printing apparatus for a can including the sleeve printing plate cylinder.

It is a schematic explanatory drawing of the printing apparatus of the can which is 1st embodiment of this invention. 1 is a perspective view showing a sleeve printing plate cylinder and a sleeve printing plate according to a first embodiment of the present invention. It is explanatory drawing which shows the cross section orthogonal to the axis line L of the plate cylinder for sleeve printing plates which is 1st embodiment of this invention, and a sleeve printing plate. It is explanatory drawing which shows the uneven | corrugated | grooved part provided in the plate cylinder for sleeve printing plates which is 1st embodiment of this invention. It is a perspective view of the plate cylinder for sleeve printing plates which is 2nd embodiment of this invention. It is a perspective view which shows the plate cylinder for sleeve printing plates which is 3rd embodiment of this invention, and a sleeve printing plate. FIG. 6 is a perspective view showing a sleeve printing plate cylinder and a sleeve printing plate according to a fourth embodiment of the present invention. It is explanatory drawing which shows the cross section parallel to the axis line L of the cylinder for sleeve printing plates which is 4th embodiment of this invention, and a sleeve printing plate. It is a perspective view of the plate cylinder for sleeve printing plates which is other embodiment of this invention. It is a perspective view of the plate cylinder for sleeve printing plates which is other embodiment of this invention. It is a perspective view of the plate cylinder for sleeve printing plates which is other embodiment of this invention. It is a perspective view which shows the plate_cylinder | printing_drum for sleeve printing plates and sleeve printing plate which are other Embodiment of this invention. It is a perspective view which shows the plate_cylinder | printing_drum for sleeve printing plates and sleeve printing plate which are other Embodiment of this invention. It is explanatory drawing which shows the cross section parallel to the axis line L of the plate cylinder for sleeve printing plates which is other embodiment of this invention, and a sleeve printing plate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a printing apparatus A for a can according to the present embodiment will be described. An outline of the printing apparatus A for cans is shown in FIG.
The printing apparatus A for cans according to this embodiment includes a plurality of ink adhesion mechanisms B and can movement mechanisms C.

  The ink adhering mechanism B includes an inker unit 1 that supplies ink, and a blanket 9 that contacts the outer surface of the can body 20 and prints (adheres) the ink after contacting the inker unit 1 and copying the ink. And a blanket wheel 8 having a plurality of sheets.

The inker unit 1 includes an ink source 2, a ducting roll 3 that contacts the ink source 2 and receives ink, an intermediate roller 4 that is connected to the ducting roll 3 and includes a plurality of rollers, and the intermediate roller 4 A rubber roller 5 to be connected and a plate cylinder 60 to be connected to the rubber roller 5 are provided. A sleeve printing plate 30 is disposed on the outer peripheral surface (cylindrical surface 62) of the plate cylinder 60. The plate cylinder 60 is rotatably supported on the drive shaft 71 in a cantilever state.

A plurality of blankets 9 are provided on the outer peripheral surface of the blanket wheel 8. The blanket 9 is configured to contact the plate body 33 of the sleeve printing plate 30 disposed on the outer peripheral surface of the plate cylinder 60 and to contact the can cylinder 20.

The can moving mechanism C sequentially includes a can shooter 10 for taking in the can body 20, a mandrel 11 for rotatably holding the can body 20 supplied from the can shooter 10, and a can body 20 mounted on the mandrel 11. , And a mandrel turret 12 that rotates in the direction of the ink adhesion mechanism B.

Next, the sleeve printing plate 30 disposed on the outer peripheral surface (cylindrical surface 62) of the plate cylinder 60 will be described. As shown in FIGS. 2 and 3, the sleeve printing plate 30 used in the present embodiment includes a sleeve support 31 that has a cylindrical shape extending along the axis L.
The sleeve support 31 is made of fiber reinforced plastic (FRP) or polyethylene terephthalate (PET) resin. The thickness t1 of the sleeve support 31 is constant in the axis L direction and the circumferential direction. The thickness t1 of the sleeve support 31 is in the range of 0.25 mm ≦ t1 ≦ 1 mm, and in this embodiment, t1 = 0.6 mm.

  A plate body 33 on which an image pattern is formed is disposed on the outer peripheral surface of the sleeve support 31. The plate body 33 is obtained by forming an image pattern on a plate material by etching or laser processing. The plate material is formed of, for example, a photosensitive resin that can be engraved with laser light. The thickness t2 of the plate body 33 is in the range of 0.4 mm ≦ t2 ≦ 1.2 mm, and in this embodiment, t2 = 0.7 mm.

In the present embodiment, the two plate bodies 33 are arranged at positions facing each other with the axis L therebetween. The portion where the plate bodies 33 and 33 are formed is an image portion S1 used for printing. Further, a portion where the plate main bodies 33 and 33 are not disposed is a non-image portion S2.
On the other side of the sleeve printing plate 30 in the axis L direction (right side in FIG. 2), a guide notch 34 for guiding a circumferential relative position with respect to the plate cylinder 60 and an axial L direction relative position is formed.

Next, the plate cylinder 60 will be described. As shown in FIGS. 2 and 3, the plate cylinder 60 has a cylindrical shape, and includes an inner peripheral hole 61, a cylindrical surface 62 facing the outer peripheral side, and an end surface 63 facing one side in the axis L direction. ing.
The plate cylinder 60 opens to an end surface 63 facing one side in the axis L direction and extends along the axis L, and an air hole 65 communicating with the air supply path 64 and opening in the cylindrical surface 62. It has.

A distal end of a drive shaft 71 that rotationally drives the plate cylinder 60 is detachably inserted into the inner peripheral hole 61. In the present embodiment, the inner circumferential hole 61 is a tapered hole that gradually decreases in diameter toward one side in the axis L direction (left side in FIG. 2), and the tip of the drive shaft 71 is also one side in the axis L direction (in FIG. 2). The taper shaft gradually decreases in diameter toward the left side. Here, the inner peripheral hole 61 and the drive shaft 71 are taper-fitted, and the relative position in the axis L direction is determined.

On the cylindrical surface 62, a guide pin 66 is provided at the end on the other side in the axis L direction (right side in FIG. 2) to guide the circumferential relative position with respect to the sleeve printing plate 30 and the relative position in the axis L direction. .

The cylindrical surface 62 is provided with a concavo-convex portion 67 in a part in the circumferential direction. The concavo-convex portion 67 has a ridge 67A that is recessed radially inward and a ridge 67B that protrudes radially outward.
A plurality of uneven portions 67 are provided in the circumferential direction of the cylindrical surface 62, and the plurality of uneven portions 67 are arranged at equal intervals in the circumferential direction. In the present embodiment, as shown in FIG. 3, the two concavo-convex portions 67 and 67 are disposed symmetrically about the axis L.

  As shown in FIG. 2, the concave stripe 67 </ b> A and the convex stripe 67 </ b> B of the concavo-convex portion 67 have an axis line so that the other side portion in the axis L direction goes to the front side in the rotational direction R of the plate cylinder 60 as it goes to the other side. Inclined with respect to L, the one side portion in the axis L direction is inclined with respect to the axis L so as to go forward in the rotational direction R of the plate cylinder 60 toward one side in the axis L direction. Thereby, in the cross section along the axis L, the concave stripes 67A and the convex stripes 67B are alternately arranged. The uneven portion 67 is formed by subjecting the cylindrical surface 62 to uneven processing such as knurling.

Further, in the present embodiment, the concave stripe 67A and the convex stripe 67B have a triangular cross section as shown in FIG.
The depth d of the recess 67A is set to 0 ≦ d ≦ t1 with respect to the thickness t1 of the sleeve support 31 of the sleeve printing plate 30. The height h of the ridge 67B is set to 0.1 × t1 ≦ h ≦ 0.8 × t1 with respect to the thickness t1 of the sleeve support 31 of the sleeve printing plate 30.

Next, a method for mounting the sleeve printing plate 30 on the plate cylinder 60 will be described.
First, the other end of the sleeve printing plate 30 is fitted into the outer peripheral surface of the plate cylinder 60. In this state, an air pump or the like is connected to the air supply path 64 opened in the end surface 63 facing the one side in the axis L direction of the plate cylinder 60 to supply air. The supplied air is ejected from an air hole 65 opened in the cylindrical surface 62 through an air supply path 64 extending parallel to the axis L. The diameter of the sleeve printing plate 30 is expanded by the jetted air, and the sleeve printing plate 30 is mounted on the plate cylinder 60.

At this time, the guide notch 34 provided on the other side in the axis L direction of the sleeve printing plate 30 is engaged with the guide pin 66 projecting on the other side in the axis L direction of the cylindrical surface 62 of the plate cylinder 60, and the sleeve A circumferential relative position and an axial L direction relative position between the printing plate 30 and the plate cylinder 60 are determined.
At the circumferential relative position between the sleeve printing plate 30 and the plate cylinder 60 determined in this manner, the portion between the plate bodies 33, 33 provided on the outer peripheral surface of the sleeve printing plate 30, that is, the inner periphery of the non-image portion S2. It is positioned so that the concavo-convex part 67 is located on the surface.

  In the can printing apparatus A in which the sleeve printing plate 30 is mounted on the plate cylinder 60 in this way, inks of different colors from the ink source 2 of each inker unit 1 are supplied to the ducting roll 3 and the intermediate roller 4, respectively. Then, it is attached to the plate main body 33 disposed on the outer peripheral surface (cylindrical surface 62) of the plate cylinder 60 through the rubber roller 5. Each color ink is placed as a pattern on the blanket 9 on the rotating blanket wheel 8, and this pattern is printed while contacting the can body 20 held on the mandrel 11.

  According to the plate cylinder 60 according to the present embodiment having such a configuration, the cylindrical surface 62 to which the sleeve printing plate 30 is attached is provided with a recess 67A that is recessed radially inward and a protrusion that protrudes radially outward. Since the concavo-convex portion 67 having the stripes 67B is provided, the rugged portion 67 bites into the inner peripheral surface of the sleeve printing plate 30, whereby the sleeve printing plate 30 is firmly fixed. Thereby, the position shift during printing of the sleeve printing plate 30 is prevented, and the printing quality is improved.

Further, since the rotational torque from the plate cylinder 60 is transmitted to the sleeve printing plate 30 via the uneven portion 67, an excessive load is not applied to the guide cutout portion 34 and the like, and the sleeve printing plate 30 is brought to an early stage. Deterioration can be suppressed.
Further, since the cross sections of the concave stripes 67A and the convex stripes 67B of the concave and convex portion 67 are triangular, the concave and convex portion 67 can be surely bited into the inner peripheral surface of the sleeve printing plate 30, and the sleeve printing plate 30 can be It becomes possible to fix firmly.

In addition, since the two concavo-convex portions 67 and 67 are symmetrically disposed about the axis L on the cylindrical surface 62, the rotational torque from the concavo-convex portion 67 acts equally in the circumferential direction of the sleeve printing plate 30. As a result, deformation of the sleeve printing plate 30 can be suppressed, and the printing operation can be performed stably. Further, it is possible to prevent the positional deviation during printing of the sleeve printing plate 30 more reliably.
And since the uneven | corrugated | grooved part 67 is comprised so that it may be located in the internal peripheral surface of the non-image part S2 of the sleeve printing plate 30, even if the uneven | corrugated | grooved part 67 bites into the internal peripheral surface of the sleeve printing plate 30, The image pattern of the plate bodies 33 and 33 disposed in the image portion S1 used for printing is not deformed, and the printing operation can be performed stably.

  Further, since the concave stripes 67 </ b> A and the convex stripes 67 </ b> B of the concavo-convex portion 67 are alternately arranged in the cross section along the axis L, the sleeve printing plate 30 moves along the axis L direction of the plate cylinder 60. Is prevented, and the position of the sleeve printing plate 30 and the plate cylinder 60 in the direction of the axis L is fixed.

  The concave stripes 67A and the convex stripes 67B of the concavo-convex portion 67 are inclined with respect to the axis L so that the other side portion in the axis L direction goes to the other side of the axis L direction and toward the front side in the rotation direction R of the plate cylinder 60, Since the one side portion in the axis L direction is inclined with respect to the axis L so as to go to the front side in the rotation direction R of the plate cylinder 60 as it goes to the one side in the axis L direction, the sleeve printing plate 30 has the concave stripes 67A and the projections. Even if it tries to move along the extending direction of the strip 67B, force acts in different directions, and the movement of the sleeve printing plate 30 is suppressed.

  Since the depth d of the concave stripe 67A is 0 ≦ d ≦ t1, when air is ejected from the air hole 65 in order to remove the sleeve printing plate 30, the escape of air is suppressed, and the sleeve printing plate 30 The diameter can be expanded and removed reliably.

  Furthermore, since the height h of the ridge 67B of the concavo-convex portion 67 is set to h ≧ 0.1 × t1 with respect to the thickness t1 of the sleeve support 31 of the sleeve printing plate 30, the height of the ridge 67B is high. The length h is ensured, and the ridge 67B can be surely bitten into the sleeve support 31. Further, since the height h of the ridge 67B is set to h ≦ 0.8 × t1, deformation of the sleeve printing plate 30 is suppressed.

  In addition, according to the printing apparatus A for a can according to the present embodiment, the sleeve printing plate 30 and the plate cylinder 60 are firmly fixed, so that the positional deviation during printing of the sleeve printing plate 30 is prevented, and printing is performed. Work can be performed stably.

Next, a plate cylinder as a second embodiment of the present invention will be described with reference to FIG.
The plate cylinder 160 according to the present embodiment has a cylindrical shape, and includes an inner peripheral hole 161, a cylindrical surface 162 facing the outer peripheral side, and an end surface 163 facing one side in the axis L direction.
The plate cylinder 160 has an air supply path 164 that opens to an end surface 163 facing one side in the axis L direction and extends along the axis L, and an air hole 165 that communicates with the air supply path 164 and opens to the cylinder surface 162. And.

The cylindrical surface 162 is provided with a rough surface portion 167 having minute irregularities in a part of the circumferential direction.
A plurality of the rough surface portions 167 are provided in the circumferential direction of the cylindrical surface 162, and the plurality of rough surface portions 167 are arranged at equal intervals in the circumferential direction. In the present embodiment, the two rough surface portions 167 and 167 are arranged symmetrically about the axis L.
The rough surface portion 167 is formed by subjecting the cylindrical surface 162 to a roughening process such as blasting. Here, the ten-point average roughness Rzjis of the rough surface portion 167 is set to 10 μm or more.

According to the plate cylinder 160 according to the present embodiment having such a configuration, a rough surface portion 167 having minute irregularities is formed on a part of the cylindrical surface 162 to which the sleeve printing plate 30 is attached. Therefore, when the minute unevenness of the rough surface portion 167 bites into the inner peripheral surface of the sleeve printing plate 30, the friction coefficient between the inner peripheral surface of the sleeve printing plate 30 and the rough surface portion 167 is significantly increased, and sleeve printing is performed. The plate 30 can be firmly fixed. In particular, since the ten-point average roughness Rzjis of the rough surface portion 167 is set to 10 μm or more, minute irregularities of the rough surface portion 167 can be surely bited into the inner peripheral surface of the sleeve printing plate 30.
In blast processing, the surface roughness of the rough surface portion to be formed can be adjusted with high accuracy by selecting the hardness and particle size of the abrasive grains to be collided.

Next, the plate cylinder which is 3rd embodiment of this invention is demonstrated with reference to FIG.
As shown in FIG. 6, the plate cylinder 560 is provided with a flange portion 570 that protrudes outward in the radial direction on the other side in the axis L direction (right side in FIG. 6). The flange portion 570 is an end surface abutting member that abuts against the other end surface of the sleeve printing plate 30 when the sleeve printing plate 30 is attached. Here, the flange portion 570 is retracted radially inward from the plate body of the sleeve printing plate 30.

The surface of the flange portion 570 facing the one side in the axis L direction, that is, the surface contacting the end surface on the other side of the sleeve printing plate 30, is recessed on the other side in the axis L direction and on the one side in the axis L direction. A concavo-convex portion 571 composed of a protruding convex portion is formed.
Further, a guide pin 566 for guiding the circumferential relative position with respect to the sleeve printing plate 30 and the relative position in the axis L direction protrudes from the cylindrical surface 562 of the plate cylinder 560 at the other end on the axis L direction. ing.

According to the plate cylinder 560 according to the present embodiment having such a configuration, when the sleeve printing plate 30 is attached, the other end surface of the sleeve printing plate 30 and one side in the axis L direction of the flange portion 570 are arranged. The surface that faces is in contact. At this time, the unevenness portion 571 of the flange portion 570 bites into the other end surface of the sleeve printing plate 30, so that the friction coefficient is significantly increased between the sleeve printing plate 30 and the flange portion 570. Therefore, the sleeve printing plate 30 is firmly fixed, and the displacement of the sleeve printing plate 30 during printing is prevented. Therefore, according to the plate cylinder 560, high-quality printing can be performed. Further, the service life of the sleeve printing plate 30 can be extended.
Further, since the flange portion 570 is retracted radially inward from the plate main body of the sleeve printing plate 30, the flange portion 570 is prevented from interfering with peripheral members during printing, and the printing operation is stably performed. be able to.

Next, a plate cylinder which is a fourth embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 7, the plate cylinder 660 includes an end surface abutting member 670 attached from one side in the axis L direction (left side in FIG. 7).
The end surface abutting member 670 has a ring shape, and, as shown in FIGS. 7 and 8, a fixing bolt is used by using a screw hole 663A provided on the end surface 663 on one side in the axis L direction of the plate cylinder 660. It is set as the structure fixed so that it may press to the axis line L direction other side at 675. A plurality of fixing bolts 675 are arranged in the circumferential direction.
The end surface abutting member 670 is brought into contact with one end surface of the sleeve printing plate 30 mounted on the cylindrical surface 662 of the plate cylinder 660. Here, the end surface abutting member 670 is retracted radially inward from the plate body of the sleeve printing plate 30.

On the surface of the end surface abutting member 670 facing the other side in the axis L direction, that is, the surface contacting the end surface on one side of the sleeve printing plate 30, the recess recessed in one side in the axis L direction and projecting in the other side in the axis L direction. Concave and convex portions 671 made of the convex portions are formed.
Further, a guide pin 666 for guiding the circumferential relative position with respect to the sleeve printing plate 30 and the relative position in the axis L direction protrudes from the cylindrical surface 662 of the plate cylinder 660 at the end on the other side in the axis L direction. ing.

  Here, as shown in FIG. 8, the end surface abutting member 670 has a structure in which a radially outer edge portion protrudes on the cylindrical surface 662 of the plate cylinder 660, and the protruding portion corresponds to the sleeve printing plate 30. The sleeve printing plate 30 is brought into contact with the end face on one side and presses the sleeve printing plate 30 toward the other side in the axis L direction.

According to the plate cylinder 660 according to the present embodiment having such a configuration, the end surface abutting member 670 mounted from one side in the axis L direction presses the sleeve printing plate 30 toward the other side in the axis L direction. Therefore, the end surface abutting member 670 and the surface on one side of the sleeve printing plate 30 are in close contact with each other. And since the uneven | corrugated | grooved part 671 is formed in this end surface contact member 670, when the uneven | corrugated | grooved part 671 bites into the sleeve printing plate 30, the sleeve printing plate 30 is fixed firmly.
Further, since the end surface abutting member 670 is retracted radially inward from the plate main body of the sleeve printing plate 30, the end surface abutting member 670 is prevented from interfering with the peripheral members during printing, and the printing operation is performed. It can be performed stably.

By pressing the sleeve printing plate 30 toward the other side in the axis L direction, the guide notch 34 and the guide pin 666 are reliably engaged, and the circumferential relative position between the sleeve printing plate 30 and the plate cylinder 660 and The relative position in the axis L direction is determined with high accuracy.
By adjusting the position of the end surface abutting member 670 in the axis L direction, the pressing force to the sleeve printing plate 30 can be adjusted, and excessive deformation of the sleeve printing plate 30 can be prevented.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention.
For example, in the first embodiment, as illustrated in FIG. 4, it has been described that the concave stripes 67 </ b> A and the convex stripes 67 </ b> B of the concavo-convex portion 67 have a triangular cross section. There is no particular limitation, and the cross section may be arcuate or rectangular.

  In the first embodiment, the concave line 67 </ b> A and the convex line 67 </ b> B of the concavo-convex part 67 have the axis L so that the other side portion in the axis L direction is directed to the front side in the rotational direction R of the plate cylinder 60. In the above description, the one side portion in the direction of the axis L is inclined toward the front side in the rotation direction R of the plate cylinder 60 toward the one side in the direction of the axis L. It will never be done.

For example, like the copper plate 260 shown in FIG. 9, the recess 267 </ b> A and the protrusion 267 </ b> B of the uneven portion 267 may extend along the axis L.
As in the copper plate 360 shown in FIG. 10, a concave and convex portion 367 having concave grooves 367A and ridges 367B extending in the axis L direction and concave grooves 367C and ridges 367D extending in the circumferential direction is formed into a cylindrical surface 362. You may form in.
As in the plate cylinder 460 shown in FIG. 11, the concave and convex portions 467 may be formed by forming the concave portions 467A and the convex portions 467B instead of the concave strips and the convex strips.

  In 3rd Embodiment, although demonstrated as what provided the flange part as an end surface contact member contact | abutted on the other side surface of a sleeve printing plate, it is not limited to this. As shown in FIG. 12, an end surface abutting member 770 that protrudes radially outward from a part in the circumferential direction may be provided, and a plurality of end surface abutting members 770 may be arranged in the circumferential direction.

  In the third embodiment, the flange portion 570 has been described as being retracted radially inward from the plate body of the sleeve printing plate 30, but the present invention is not limited to this, and the flange portion 570 is not limited to this. The plate body may protrude outward in the radial direction from the plate body.

  In the fourth embodiment, the ring-shaped member is provided as an end surface abutting member that abuts on one surface of the sleeve printing plate. However, the present invention is not limited to this. As shown in FIG. 13, an end surface abutting member 870 that presses a part of the sleeve printing plate 30 in the circumferential direction may be provided, and a plurality of end surface abutting members 870 may be arranged in the circumferential direction.

  In the fourth embodiment, the radial outer edge portion of the end surface abutting member has been described as protruding on the cylindrical surface, but the present invention is not limited to this. As shown in FIG. 14, the length of the sleeve printing plate 30 in the direction of the axis L is lengthened, one end surface of the sleeve printing plate 30 protrudes from the cylindrical surface 962, and one end of the sleeve printing plate 30 is formed by the end surface contact member 970. It is good also as a structure which presses the side end surface. The protruding length of the sleeve printing plate 30 is preferably in the range of 0.6 mm to 1 mm.

  In the fourth embodiment, the end surface abutting member 670 is described as being retracted radially inward from the plate body of the sleeve printing plate 30, but the present invention is not limited to this, and the end surface abutting member 670 is not limited to this. The sleeve printing plate 30 may protrude outward in the radial direction from the plate body.

Although the description has been made assuming that two uneven portions or rough surface portions are formed in the circumferential direction, the present invention is not limited to this, and one or more uneven portions or rough surface portions may be formed.
Although it has been described that the uneven portion or the rough surface portion is located on the inner peripheral surface of the non-image portion, if the deformation of the image pattern or the like of the image portion is suppressed, the uneven portion or the rough portion on the inner peripheral surface side of the image portion A surface portion may be located.

Although it has been described that the sleeve support 31 is provided and the plate main body 33 is formed on the outer peripheral surface of the sleeve support 31, the sleeve printing plate to be mounted is not limited to this embodiment.
Anti-slip processing portions may be formed on both the cylindrical surface that contacts the inner peripheral surface of the sleeve printing plate and the end surface abutting member that contacts the end surface of the sleeve printing plate.

A comparative experiment conducted to confirm the effectiveness of the present invention will be described.
A sleeve printing plate having an inner diameter of 225.5 mm is mounted on a plate cylinder having an outer diameter of 226 mm and the length in the axis L direction is 187 mm, and the rotational torque value at which the sleeve printing plate starts moving along the cylindrical surface is measured. did.
In the sleeve printing plate, the sleeve support is made of FRP, the plate material is made of a photosensitive resin, the thickness t1 of the sleeve support is 0.7 mm, and the thickness t2 of the plate material is 0. .6 mm was used.

In the conventional example, a plate cylinder having no cylindrical surface and having no end surface abutting member that abuts on the end surface of the sleeve printing plate is used. The ten-point average roughness Rzjis of this cylindrical surface was 5 μm.
In Example 1 of the present invention, a plate cylinder having a rough surface portion formed by blasting on a cylindrical surface was used. The ten-point average roughness Rzjis of this rough surface portion was 20 μm. Two rough surface portions were formed in the circumferential direction of the cylindrical surface, and one rough surface portion was formed so as to occupy 20% of the circumferential direction of the cylindrical surface.

Example 2 of the present invention used a plate cylinder in which concave and convex portions having concave and convex portions along the axis L were formed on the cylindrical surface by performing concave and convex processing on the cylindrical surface, as shown in FIG. . The concave stripe and the convex stripe were triangular in cross section, the depth d of the concave stripe was 0.2 mm, and the height h of the convex stripe was 0.5 mm. Two uneven portions were formed in the circumferential direction of the cylindrical surface, and one uneven portion occupied 20% of the circumferential direction of the cylindrical surface.

Example 3 of the present invention is a plate cylinder in which concave and convex portions provided with concave and convex ridges inclined with respect to the axis L are formed on the cylindrical surface by performing concave and convex processing on the cylindrical surface, as shown in FIG. used. The concave stripe and the convex stripe were triangular in cross section, the depth d of the concave stripe was 0.2 mm, and the height h of the convex stripe was 0.5 mm. Two uneven portions were formed in the circumferential direction of the cylindrical surface, and one uneven portion occupied 20% of the circumferential direction of the cylindrical surface.

In Example 4 of the present invention, as shown in FIG. 6, a flange portion was provided on the other side in the axis L direction of the plate cylinder, and an uneven portion was formed on this flange portion. The concavo-convex part had a triangular cross section, the depth d of the concave part was 0.2 mm, and the height h of the convex part was 0.5 mm.

In Example 5 of the present invention, as shown in FIG. 12, an end surface abutting member projecting radially outward is provided on the other side in the axis L direction of the plate cylinder. Three end surface abutting members were arranged at equal intervals in the circumferential direction. The size of the end surface contact member in the circumferential direction was 25 mm. The end surface abutting member was formed with the same concavo-convex portion as Example 4 of the present invention.

As shown in FIG. 7, Example 6 of the present invention is provided with a ring-shaped end surface abutting member that abuts on the sleeve printing plate from one side in the axis L direction of the plate cylinder. An uneven portion was formed on the end surface abutting member. The concavo-convex part had a triangular cross section, the depth d of the concave part was 0.2 mm, and the height h of the convex part was 0.5 mm. Further, the sleeve printing plate was pressed 0.8 mm toward the other side in the axis L direction.

In Example 7 of the present invention, as shown in FIG. 13, a plurality of end surface abutting members that abut on the sleeve printing plate from one side in the axis L direction of the plate cylinder were provided. Three end surface abutting members were arranged at equal intervals in the circumferential direction. The size of the end surface contact member in the circumferential direction was 13 mm. This end surface abutting member was formed with uneven portions similar to those of Example 6 of the present invention.

Example 8 of the present invention is a ring-shaped end surface in which a concavo-convex portion is formed on the cylindrical surface as in Example 2 of the present invention, and the sleeve cylinder is in contact with the sleeve printing plate from one side in the axis L direction of the plate cylinder as in Example 6 of the present invention. A contact member was provided.

In Invention Example 9, an uneven portion is formed on the cylindrical surface as in Invention Example 3, and a flange portion is provided on the other side in the axis L direction of the plate cylinder as in Invention Example 4, and this flange portion is uneven. The part was formed.

According to Table 1, it was confirmed that Example 1-9 of the present invention has a higher torque at which the sleeve printing plate starts to rotate and can be firmly fixed compared to the conventional example. Therefore, according to the present invention, it is possible to prevent the positional deviation during printing of the sleeve printing plate, and it is possible to perform the printing operation stably.

30 Sleeve printing plate 33 Plate body 60, 160, 260, 360, 460, 560, 660, 760, 860, 960 Plate cylinder (plate cylinder for sleeve printing plate)
62, 162, 262, 362, 462, 562, 662, 762, 962 Cylindrical surface 67, 267, 367, 467, 571, 671, 771 Concavity and convexity (anti-slip processing part)
167 Rough surface (non-slip processed part)
570, 670, 770, 870, 970 End surface abutting member S1 Image portion S2 Non-image portion L Axis A Can printing device

[0004]
Means for Solving the Problems [0013]
The sleeve printing plate cylinder of the present invention is a sleeve printing plate cylinder having a cylindrical surface extending along an axis, to which a sleeve printing plate having a cylindrical shape is detachably attached. A state in which the sleeve printing plate is attached to the inside of the plate cylinder, provided with an air supply path extending along the axis of the cylindrical surface, and an air hole communicating with the air supply path and opening in the cylindrical surface Thus, a non-slip processing portion that increases the frictional force with the sleeve printing plate is formed on a part of the cylindrical surface that is in contact with the inner peripheral surface of the sleeve printing plate, and the air supplied to the air supply path is The sleeve printing plate is ejected from the air hole opening in the cylindrical surface, and the diameter of the sleeve printing plate is expanded by the air ejected from the air hole, whereby the sleeve printing plate is mounted on the plate cylinder. .
[0014]
In the sleeve printing plate cylinder of the present invention having such a configuration, the sleeve printing plate is firmly fixed by the anti-slip processing portion, and the occurrence of misalignment during printing is prevented. Therefore, the printing operation can be performed stably. Further, since the rotational torque is transmitted to the sleeve printing plate by the anti-slip processing portion, an excessive load does not act on the notch portion of the sleeve printing plate. Therefore, deformation of the notch portion of the sleeve printing plate is suppressed, early deterioration of the sleeve printing plate is suppressed, and printing with high registration accuracy is possible.
[0015]
The anti-slip portion formed on a part of the cylindrical surface increases the frictional force with the inner peripheral surface of the sleeve printing plate, and the sleeve printing plate is firmly fixed.
[0016]
[0017]
A plurality of the non-slip processed portions may be provided in the circumferential direction, and the plurality of the anti-slip processed portions may be arranged at equal intervals in the circumferential direction.
In this case, the rotational torque from the anti-slip processed part is in the circumferential direction of the sleeve printing plate.

Claims (10)

A sleeve printing plate cylinder having a cylindrical surface extending along an axis, and a sleeve printing plate having a cylindrical shape detachably attached to the cylindrical surface,
With the sleeve printing plate attached, an anti-slip portion is formed that contacts at least one of the inner peripheral surface and the end surface of the sleeve printing plate and increases the frictional force with the sleeve printing plate. A printing cylinder for sleeve printing plates. The plate cylinder for a sleeve printing plate according to claim 1,
The anti-slip portion is formed on a part of the cylindrical surface that comes into contact with the inner peripheral surface of the sleeve printing plate. The sleeve printing plate cylinder according to claim 1 or 2,
The anti-slip portion is formed on an end surface abutting member that contacts at least one of the one end surface and the other end surface of the sleeve printing plate. The sleeve printing plate cylinder according to any one of claims 1 to 3,
A plurality of the anti-slip processing parts are provided in the circumferential direction, and the plurality of the anti-slip processing parts are arranged at equal intervals in the circumferential direction. The sleeve printing plate cylinder according to any one of claims 1 to 4,
The non-slip processed portion is a rough surface portion formed by roughening the contact surface with the sleeve printing plate, and the ten-point average roughness Rzjis of the rough surface portion is 10 μm or more. Yes. The sleeve printing plate cylinder according to any one of claims 1 to 4,
The non-slip processed part is an uneven part formed by performing an uneven process on the contact surface with the sleeve printing plate. A plate cylinder for a sleeve printing plate according to claim 6,
The anti-slip processing part is formed on a part of the cylindrical surface,
The concave and convex portions are configured such that concave portions that are recessed inward in the radial direction and convex portions that protrude outward in the radial direction are alternately arranged in a direction parallel to the axis. A plate cylinder for a sleeve printing plate according to any one of claims 3 to 6,
The anti-slip processing portion includes an end surface abutting member that abuts on one end surface of the sleeve printing plate, and the end surface abutting member presses the sleeve printing plate toward the other side in the axial direction. Has been. A method of using the sleeve printing plate cylinder according to any one of claims 1 to 8,
On the outer peripheral surface of the sleeve printing plate, an image portion in which an image pattern used for printing is disposed and a non-image portion not used for printing are formed,
A method of using a sleeve printing plate cylinder, wherein the sleeve printing plate is mounted so that the non-slip processing portion is disposed in the non-image portion. A printing apparatus for a can that prints an image pattern formed on an outer peripheral surface of a cylindrical sleeve printing plate on a can body,
A printing apparatus for cans, wherein the sleeve printing plate is mounted on the plate cylinder for a sleeve printing plate according to any one of claims 1 to 8.

Images