JP2006231758A - Mounting method of printing form plate to sleeve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the easy dismount of a printing form plate at its dismount in an offset printing machine, on which a sleeve is employed, on a mounting method of the printing form plate to the sleeve. <P>SOLUTION: The mounting method of the printing form plate 4 to the sleeve 1 in the offset printing machine, on which the sleeve 1 is employed, is equipped with a protective layer forming step for forming a protective layer 2, which protects the external peripheral surface of the sleeve 1, on the external peripheral surface of the sleeve 1, a bonding layer forming step for forming a bonding layer 3 for bonding the printing form plate 4 onto the surface of the protective layer 2 and a printing form plate 4 bonding step for bonding the printing form plate 4 onto the surface of the bonding layer 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset printing press using a sleeve, and more particularly, a printing plate sleeve suitable for use in a variable cut-off printing press having a variable cut-off length by selecting and using sleeves having different outer diameters. It relates to the mounting method.

  Conventionally, various methods for attaching a printing plate (hereinafter simply referred to as a plate) to the surface of a plate cylinder have been developed in an offset printing machine. As typical examples thereof, for example, in Patent Document 1, slits are formed in a strip shape in the machine width direction on the surface of the plate cylinder, and the edge side and the tail edge side of the plate wound around the surface of the plate cylinder A method is disclosed in which a plate is attached to the surface of a plate cylinder by inserting and locking the end portion into the slit. In the mounting method disclosed in Patent Document 1, if the dimensional tolerance is wrong, it is not possible to insert the edge part on the side of the plate or the edge side on the edge of the plate into the slit, or conversely, the width of the slit is too wide. There is a risk that the side end and the tail end side cannot be sufficiently locked.

Patent Document 2 discloses a method in which a cylindrical plate connecting one end and the other end of a plate is temporarily expanded with compressed air to cover the plate cylinder surface. In the mounting method disclosed in Patent Document 2, the cost for manufacturing the sleeve-shaped plate is high, and a space for storing the sleeve-shaped plate is required.
By the way, in recent years, an offset printing machine (also referred to as a variable cutoff printing machine) capable of changing the diameter of the plate cylinder has been developed. In such an offset printing machine, a plurality of cylindrical sleeves having different thicknesses (that is, the inner diameter is substantially equal to the outer diameter of the plate cylinder and the outer diameter is different) are prepared in advance, for example, a plate corresponding to the length of the printed matter. A necessary sleeve is appropriately selected so as to have a cylinder diameter, and the selected sleeve is fitted from one end in the axial direction of the plate cylinder to be mounted on the plate cylinder. The sleeve surface is preliminarily equipped with a plate clamping device, and the plate is attached to the sleeve surface by the plate clamping device with the sleeve mounted on the plate cylinder.

Patent Document 3 discloses a sleeve having a plate on its surface in a flexographic printing machine, although it is not an offset printing machine. Generally, in a flexographic printing machine, a plate is directly attached to a sleeve surface using a double-sided tape.
JP-A-8-58064 JP-A-7-68736 JP-A-9-207308

  However, in the offset printing machine using the sleeve described above, if the plate is directly attached to the sleeve surface with a double-sided tape as in a general flexographic printing machine, the plate is difficult to peel off when removing the plate from the sleeve surface. If it is peeled off, the sleeve surface may be physically damaged. In addition, even if the plate is peeled off, the adhesive substance of the double-sided tape remains on the sleeve surface, so it is necessary to clean the sleeve surface with a solvent, which may cause chemical damage to the sleeve surface. . In particular, in the offset printing machine, the plate is frequently replaced as compared with the flexographic printing machine, so that it takes a lot of time to remove the plate, and the burden on the operator is large.

  The present invention was devised in view of the above problems, and in an offset printing machine using a sleeve, the printing plate can be easily removed when the printing plate is removed. It aims to provide a method.

  For this reason, the method for attaching the printing plate of the present invention to the sleeve according to claim 1 is a method for attaching the printing plate to the sleeve in an offset printing machine using a sleeve, and A protective layer forming step for forming a protective layer for protecting the outer peripheral surface of the sleeve, an adhesive layer forming step for forming an adhesive layer for adhering the printing plate on the surface of the protective layer, and a surface on the surface of the adhesive layer. A printing plate bonding step for bonding the printing plate is provided.

According to a second aspect of the present invention, in the method for attaching the printing plate of the present invention to the sleeve, the outer peripheral surface of the sleeve is covered with a heat shrink film in the protective layer forming step, and the heat shrink film is heated. Then, the protective layer is formed by bringing the heat shrink film into close contact with the outer peripheral surface of the sleeve.
The method for attaching the printing plate of the present invention to the sleeve according to claim 3 is the method according to claim 1 or 2, wherein in the adhesive layer forming step, a double-sided tape is applied to the surface of the protective layer, It is characterized by forming an adhesive layer.

  The method for attaching the printing plate of the present invention to the sleeve according to claim 4 is the method according to any one of claims 1 to 3, wherein the sleeve has a belt-like shape over the machine width direction of the outer peripheral surface of the sleeve. The printing plate has a slit, and a locking member is provided in the slit to lock the grip side end and the tail edge side end of the printing plate. After the printing plate bonding step, the printing plate The tail end and the tail end are locked by the locking member.

  The method for attaching the printing plate of the present invention to the sleeve according to claim 5 is the method according to any one of claims 1 to 4, wherein the tail end and the tail edge side of the printing plate A sealing member that closes the gap is mounted in the gap between the two.

  According to the method for attaching the printing plate of the present invention to the sleeve according to claim 1, the printing plate is indirectly bonded to the sleeve via the protective layer on the outer peripheral surface of the sleeve. It is possible to prevent the printing plate from becoming difficult to peel off when being removed. This makes it possible to easily remove the printing plate without causing physical and chemical damage to the sleeve surface.

According to the method of attaching the printing plate of the present invention to the sleeve according to claim 2, the protective layer can be easily formed by the heat shrink film, and can be easily peeled off from the sleeve surface when the printing plate is removed. .
According to the method of attaching the printing plate of the present invention to the sleeve according to the third aspect, the printing plate can be easily attached to the surface of the protective layer with a double-sided tape.

According to the method of attaching the printing plate of the present invention to the sleeve of the present invention, the printing plate can be further squeezed by locking the grip side end and the tail edge side end of the printing plate with the locking member. It can be securely mounted on the sleeve.
According to the method of attaching the printing plate of the present invention to the sleeve according to claim 5, the gap between the tail end and the tail end of the printing plate is closed by the seal member. Ink and water can be prevented from entering the gap.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) First Embodiment FIGS. 1A to 1D are schematic views for explaining a method of attaching a printing plate to a sleeve as a first embodiment of the present invention. (A) is a diagram showing a state where a sleeve is covered with a heat-shrinkable film, FIG. 1 (b) is a diagram showing a state where the heat-shrinkable film is heated and brought into close contact with the outer peripheral surface of the sleeve, and FIG. The figure which shows the state which adhered the printing plate with the double-sided tape on the film, FIG.1 (d) is a figure which shows the state which removed the printing plate from the sleeve. 1A to 1D are cross-sectional views of the sleeve taken along a plane perpendicular to the machine width direction (axial direction). For convenience, in FIGS. 1A to 1D, the thicknesses of the heat shrink film 2, the double-sided tape 3 and the printing plate 4 are exaggerated. 3 and the printing plate 4 are much thinner than the sleeve 1.

  As described above, there is an offset printing machine that can change the diameter of a plate cylinder, generally called a variable cut-off printing machine, and such an offset printing machine has a different thickness ( (In other words, the inner diameter is approximately the same as the outer diameter of the plate cylinder, and the outer diameter is different.) A plurality of cylindrical sleeves are prepared. For example, the necessary sleeve is appropriately selected so that the plate cylinder diameter corresponds to the length of the printed matter. After a printing plate (also simply referred to as a plate) is attached to the surface of the selected sleeve, it is fitted from the one end in the axial direction of the plate cylinder and attached to the plate cylinder. The method is used to attach a plate to such a sleeve.

As shown in FIG. 1A, the sleeves 1 have different thicknesses, but here have a thickness of about 20 mm. The sleeve 1 is made of, for example, a hard foamed urethane material.
The heat-shrinkable film 2 is a film that shrinks by heating, and preferably has a thickness of about 0.03 to 0.10 mm from the viewpoints of physical strength, heat-shrinking force, and ease of attachment. Further, the heat shrink film 2 is formed in a cylindrical shape (tube shape) having an inner diameter larger than the outer diameter of the sleeve 1, and the axial direction of the sleeve 1 so as to cover the entire outer peripheral surface of the sleeve 1. And has a sufficient length. As the heat-shrinkable film 2, for example, a polyester film called “Hippet” (registered trademark) can be used. By heating such a heat-shrinkable film 2 with, for example, hot air, it shrinks as shown in FIG. 1 (b) and adheres closely to the outer peripheral surface of the sleeve 1 to form a protective layer that protects the outer peripheral surface of the sleeve 1. However, although the heat shrink film 2 is in close contact with the outer peripheral surface of the sleeve 1, it does not stick firmly to the outer peripheral surface of the sleeve 1 and cannot be peeled off like an adhesive such as double-sided tape or glue, but by a cutting means such as a cutter. It is easily peeled off from the outer peripheral surface of the sleeve 1. Accordingly, the adhesive material of the adhesive member such as double-sided tape or glue does not remain on the outer peripheral surface of the sleeve 1.

  In addition, although it is preferable to use the heat shrink film 2 as a protective layer, instead of the heat shrink film 2, a flexible or plastic thin plate is wound around the outer peripheral surface of the sleeve 1, and at least both end portions are outer peripheral surfaces of the sleeve 1 using double-sided tape. You may make it stick to. In this case, the double-sided tape is directly applied to the outer peripheral surface of the sleeve 1, but unlike the case where the double-sided tape is applied to the entire area of the outer peripheral surface of the sleeve 1, it is only necessary to apply it to at least both ends of the thin plate. The thin plate can be easily peeled off, and the adhesive substance of the double-sided tape hardly remains.

  Further, instead of the heat-shrinkable film 2, for example, it is a stretchable cylindrical rubber (elastic body) having an inner diameter smaller than the outer diameter of the sleeve 1 and substantially the same thickness as the heat-shrinkable film 2. May be. The protective layer can also be formed by fitting such cylindrical rubber into the sleeve 1. When using a cylindrical rubber, compared with the heat shrink film 2, a force is required when fitted to the sleeve 1. However, unlike the heat shrink film 2, there is an advantage that it is not necessary to heat and shrink by hot air or the like. is there.

  As shown in FIG. 1 (c), a double-sided tape (double-sided adhesive tape) 3 as an adhesive layer has an adhesive substance attached to both sides, and is for fixing the plate 4 to the surface of the heat shrink film 2. . The double-sided tape 3 may be partially attached to the surface of the heat shrinkable film 2 as long as the plate 4 is securely bonded onto the sleeve. Since the plate 4 may be bent, it is preferable to apply the double-sided tape 3 uniformly to the entire surface of the heat shrink film 2. Since the double-sided tape 3 has a thickness of about 0.1 mm, it can be easily cut with a cutter.

Here, the double-sided tape 3 is used as the adhesive layer, but the plate 4 may be affixed using an adhesive such as glue instead of the double-sided tape 3.
The plate 4 is generally made of aluminum, and here has a thickness of about 0.24 to 0.30 mm. The plate 4 is indirectly bonded to the outer peripheral surface of the sleeve 1 through the heat shrink film 2. Further, when the plate 4 is stuck on the sleeve 1, a minute gap (minute gap) A is formed between one end and the other end of the plate 4, and this gap is attached to the double-sided tape 3. It is preferable to affix the plate 4 so as to correspond to the time seam. By sticking the plate 4 in this way, the thickness unevenness due to the joint of the double-sided tape 3 does not affect the surface of the plate 4. In FIG. 1C, for the sake of convenience, the minute gap A is shown enlarged from the actual state.

  Since the sleeve 1, the heat shrink film 2, the double-faced tape 3 and the plate 4 according to the present embodiment are configured as described above, the plate 4 is attached to the sleeve 1 as follows. That is, first, as shown in FIG. 1A, the heat shrink film 2 is put on the sleeve 1. Next, as shown in FIG. 1B, the heat-shrinkable film 2 is heated and shrunk with hot air or the like, and is brought into close contact with the outer peripheral surface of the sleeve 1. Thereby, a protective layer is formed on the outer peripheral surface of the sleeve 1 (protective layer forming step). Thereafter, as shown in FIG. 1C, a double-sided tape 3 is attached to the surface of the heat-shrinkable film 2 (adhesive layer forming step), and a plate 4 is adhered to the surface of the double-sided tape 3 (printing plate adhesion step). All these operations are performed outside the machine. After the attachment of the plate 4 to the sleeve 1 is completed, the sleeve 1 around which the plate 4 is wound is set in a printing machine and printing is performed.

  When removing the plate 4, as shown in FIG. 1 (c), for example, the tip of a cutter is inserted into the minute gap A between the double-sided tape 3 and the printing plate 4, and the heat shrink film 2 is moved along the minute gap A. By cutting, the heat shrink film 2, the double-sided tape 3 and the printing plate 4 are removed from the sleeve 1 together as shown in FIG. This removal work is also performed outside the machine in the same manner as the attachment work.

  Thus, according to the method for attaching the printing plate 4 to the sleeve 1 according to the present embodiment, the plate 4 is indirectly attached to the outer peripheral surface of the sleeve 1 through the heat shrink film 2 as a protective layer (intermediate member). Since it adhere | attaches, when removing the plate | version | printing 4 from the sleeve 1 surface, it can prevent that the plate | plate 4 becomes difficult to peel. Thereby, the plate 4 can be easily detached from the sleeve 1 without physically damaging the outer peripheral surface of the sleeve 1. Further, since the adhesive substance does not remain on the outer peripheral surface of the sleeve 1, it is not necessary to use a solvent and the sleeve 1 surface is not chemically damaged. Therefore, there is an effect that the life of the sleeve 1 is extended, and an effect that the time required for the plate removing operation can be shortened to reduce the burden on the operator.

Further, the protective layer can be easily formed by the heat shrinkable film 2, and can be easily peeled off from the surface of the sleeve 1 when the plate 4 is removed. Furthermore, the plate 4 can be easily attached to the surface of the heat shrink film 2 by the double-sided tape 3.
In addition, a gap is formed between one end and the other end of the plate 4 as described above. Since this gap is very small, printing is possible even when compared with a sleeve equipped with a conventional plate clamping device. The length can be increased.

Furthermore, since the attachment method is simply affixing the plate 4, a plate fastening device for fastening the plate 4 to the sleeve 1 is not necessary, and the plate 4 can be attached to the thin sleeve 1.
In addition, when the rigidity of the plate 4 is high, one end and the other end of the plate 4 tend to be separated from the surface of the sleeve 1 (spring back phenomenon occurs). The adhesive force of the tape 3 is set higher than other regions, or the curvature of one end and the other end of the plate 4 is previously larger than the curvature of the intermediate portion (that is, the one end and the other end of the plate 4). The plate 4 may be formed so that the portion bends inward of the sleeve 1 with respect to the intermediate portion. Thereby, it can prevent that the one end part and other end part of the plate | version | printing 4 leave | separate from the sleeve 1 surface.

(B) Second Embodiment FIG. 2 is a schematic diagram for explaining a method of attaching a printing plate to a sleeve as a second embodiment of the present invention, and shows an enlarged vicinity of both ends of the printing plate. FIG. FIG. 2 is a cross-sectional view of the sleeve taken along a plane perpendicular to the machine width direction (axial direction). In FIG. 2, the same parts as those of the first embodiment described above are indicated by the same reference numerals, and different points from the first embodiment will be described below.

  As shown in FIG. 2, in the sleeve 1 according to the present embodiment, a strip-shaped slit (concave portion) 1 a is formed across the machine width direction of the outer peripheral surface of the sleeve 1. Here, the slit 1a is formed with a depth of about 5 to 7 mm. Further, one end (also referred to here as the tail end) 4a and the other end (also referred to as the tail end) 4b of the plate 4 are directed toward the inside of the sleeve 1 so as to enter the slit 1a. And bent.

  Further, a presser bar (locking member) 5 is provided which is fitted into the slit 1a of the sleeve 1 and locks the gripping side end 4a and the gripping end side end 4b of the plate 4. The presser bar 5 is made of resin or metal and extends in the machine width direction of the sleeve 1. Further, a groove portion 5a is formed on the upper surface of the presser bar 5 (the surface on the opening surface side of the slit 1a), and the grip end portion 4a and the tail end portion 4b of the plate 4 are formed in the groove portion 5a. It is inserted and locked. The presser bar 5 is preferably fitted into the slit 1a after the heat-shrinkable film 2 is brought into close contact with the outer peripheral surface of the sleeve 1 (including the inside of the slit 1a).

  With such a configuration, the plate 4 is attached to the sleeve 1 as follows. That is, first, the sleeve 1 is covered with the heat-shrinkable film 2, and the heat-shrinkable film 2 is heated and shrunk with hot air or the like, and is brought into close contact with the outer peripheral surface of the sleeve 1 (also inside the slit 1a). Thereby, a protective layer is formed on the outer peripheral surface of the sleeve 1 (protective layer forming step). Next, the presser bar 5 is inserted into the slit 1a, and the double-sided tape 3 is attached to the surface of the heat shrink film 2 (adhesive layer forming step), and the plate 4 is adhered to the surface of the double-sided tape 3 (printing plate adhesion step). Then, the tail end 4a and the tail end 4b of the plate 4 are inserted into the groove 5a of the presser bar 5 and locked. All these operations are performed outside the machine. After the attachment of the plate 4 to the sleeve 1 is completed, the sleeve 1 around which the plate 4 is wound is set in a printing machine and printing is performed.

  When the plate 4 is removed, the tail end 4a and the tail end 5b of the plate 4 are removed from the groove 5a of the presser bar 5 and the presser bar 5 is also removed from the slit 1a. For example, the slit 1a The heat-shrinkable film 2, the double-sided tape 3 and the plate 4 are removed together from the sleeve 1 by cutting the heat-shrinkable film 2 in close contact with the inner wall with a cutter. This removal work is also performed outside the machine in the same manner as the attachment work.

  Thus, according to the method for attaching the printing plate 4 to the sleeve 1 according to the present embodiment, the same effects as those of the first embodiment can be obtained. That is, since the plate 4 is indirectly bonded to the outer peripheral surface of the sleeve 1 via the heat shrink film 2 as a protective layer (intermediate member), the plate 4 is difficult to peel off when the plate 4 is removed from the sleeve 1 surface. Can be prevented. Thereby, the plate 4 can be easily detached from the sleeve 1 without physically damaging the outer peripheral surface of the sleeve 1. Further, since the adhesive substance does not remain on the outer peripheral surface of the sleeve 1, it is not necessary to use a solvent and the sleeve 1 surface is not chemically damaged. Therefore, there is an effect that the life of the sleeve 1 is extended.

Further, the protective layer can be easily formed from the heat shrink film 2 and can be easily peeled off from the surface of the sleeve 1 when the plate 4 is removed. Furthermore, the plate 4 can be easily attached to the surface of the heat shrink film 2 by the double-sided tape 3.
Further, as described above, a gap is formed between the tail end 4a and the tail end 4b of the plate 4, but since this gap is very small, a conventional plate clamping device is provided. Compared to the sleeve, the printing length can be increased.

Furthermore, since the holding end 4a and the tail end 4b of the plate 4 are locked by the presser bar 5, the plate 4 can be reliably wound around the sleeve 1, and the plate 4 can be gripped. It can prevent that the side edge part 4a and the tail edge side edge part 4b remove | deviate from the sleeve 1 by a spring back.
In this embodiment, the groove 5a is formed in the presser bar 5, and the grip side end 4a and the tail end 4b of the plate 4 are locked in the groove 5a. For example, as shown in FIG. The presser bar 5 is disposed so as to be in contact with one inner wall of the slit 1a via the heat shrink film 2 without forming the groove 5a, and the tail end 4a and the tail end side of the plate 4 are arranged. 4b may be inserted and locked between the heat-shrinkable film 2 and the pressing bar 5 that are in close contact with the other inner wall of the slit 1a. In this case, after the heat shrink film 2 and the double-sided tape 3 are attached to the outer peripheral surface of the sleeve 1, first, the plate 4 is attached to the double-sided tape 3 with the grip side end 4 a of the plate 4 hooked on the slit 1 a of the sleeve 1. Stick on the surface. Then, the presser bar 5 is inserted into the slit 1 a of the sleeve 1, and the tail end side end 4 b is inserted between the presser bar 5 and the tail end 4 a of the plate 4 to attach the plate 4.

Further, the slit 1a of the sleeve 1 shown in FIG. 3 may be formed to be inclined with respect to the circumferential surface of the sleeve 1 as shown in FIG. As a result, when the plate 4 is attached to the surface of the double-sided tape 3, the tail end 4 a of the plate 4 can be easily hooked in the slit 1 a, and the tail end 4 b of the plate 4 is held by the presser bar 5 and the plate 4. There is an advantage that it is easy to insert between the end portion 4a of the tail side.
Further, when a gap remains between the tail end 4a and the tail end 4b of the plate 4 shown in FIG. 2, the tail end 4a and the flange 4 of the plate 4 as shown in FIG. A seal member (elastic body) 6 such as rubber or sponge may be attached between the bottom end 4b to close the gap. Accordingly, it is possible to prevent ink and water from entering the gap during printing and prevent the plate 4 from falling off. In addition, it is preferable to mount the seal member 6 so that the upper surface of the seal member 6 smoothly connects the surface of the plate 4, thereby suppressing generation of vibration during printing.

  Further, the slit 1a and the pressing bar 5 of the sleeve 1 shown in FIG. 5 may be formed in a trapezoidal cross-sectional shape as shown in FIG. The presser bar 5 can be inserted into the slit 1 a from one end in the axial direction of the sleeve 1 after the heat shrinkable film 2 is brought into close contact with the sleeve 1. Thereby, there exists an advantage that the holding | maintenance stick | rod 5 does not pull out easily from the slit 1a to the sleeve 1 circumference direction.

2 may be formed in a trapezoidal cross-sectional shape as shown in FIG. Further, when there is a gap between the tail end 4a and the tail end 4b of the plate 4 shown in FIGS. 3 and 4, the seal member 6 shown in FIGS. You may wear it.
Moreover, as a cutting method of the heat shrink film 2, as shown in FIG. 7, for example, the nichrome wire 7 is passed in advance from one end to the other end in the machine width direction in contact with the heat shrink film 2 inside the slit 1a. When the heat shrink film 2 is cut, the heat shrink film 2 may be cut by energizing the nichrome wire. Further, for example, a cutting means 8 such as a cutter is installed in a position that does not interfere with the heat shrink film 2 inside the slit 1 a in advance, and the heat shrink film 2 is cut by the cutting means 8 when the heat shrink film 2 is cut. You may do it. Furthermore, for example, a heat-shrinkable film 2 is preliminarily passed through an ultrafine wire so that it is folded from one end to the other end in the machine width direction and from the other end to the other end. The film 2 may be cut. Further, if it is not necessary to reuse the plate 4, the heat shrink film 2, the double-sided tape 3, and the plate 4 may be cut together with a cutter. Of course, the cutting method is not limited to these.

(C) Others Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the first embodiment, the heat-shrinkable film 2 is cut by inserting the tip of the cutter into the minute gap A between the double-sided tape 3 and the printing plate 4 and cutting the heat-shrinkable film 2 along the minute gap A. You may cut | disconnect the heat-shrink film 2 using the cutting method demonstrated in 2 embodiment. That is, for example, the nichrome wire 7 is passed from one end to the other end in the machine width direction in contact with the heat shrink film 2, and the heat shrink film 2 is cut by energizing the nichrome wire when the heat shrink film 2 is cut. Or, for example, an ultrafine wire is passed through the heat shrink film 2 from one end to the other end in the machine width direction and from the other end to the other end, and when the heat shrink film 2 is cut, The shrink film 2 may be cut. Also in the first embodiment, if it is not necessary to reuse the plate 4, the heat shrink film 2, the double-sided tape 3 and the plate 4 may be cut together with a cutter.

  Further, the heat shrink film 2, the double-sided tape 3 and the plate 4 are cut together with the cutter blade protruding by a length corresponding to the total thickness of the heat shrink film 2, the double-sided tape 3 and the plate 4. May be. As a result, the sleeve 1 can be easily cut without being damaged, and regardless of the gap position of the plate 4.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view for explaining a method for attaching a printing plate to a sleeve as a first embodiment of the present invention, in which FIG. 1 (a) is a diagram showing a state in which the sleeve is covered with a heat shrink film. 1 (b) is a diagram showing a state in which a heat-shrinkable film is heated and brought into close contact with the outer peripheral surface of a sleeve, and FIG. 1 (c) is a diagram showing a state in which a printing plate is adhered to the heat-shrinkable film with a double-sided tape. 1 (d) is a view showing a state in which the printing plate is removed from the sleeve. FIG. 5 is a schematic cross-sectional view for explaining a method for attaching a printing plate to a sleeve as a second embodiment of the present invention, and is an enlarged view showing a slit of a sleeve that is locked near both ends of the printing plate. It is. It is a figure for demonstrating the modification of the pressing bar concerning 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the presser bar and slit concerning 2nd Embodiment of this invention. It is a figure for demonstrating the sealing member with which between the plate both ends concerning 2nd Embodiment of this invention is mounted | worn. It is a figure for demonstrating the modification of the presser bar and slit concerning 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the cutting method of the heat shrink film concerning 2nd Embodiment of this invention.

Explanation of symbols

1 Sleeve 1a Sleeve slit 2 Heat shrink film (protective layer)
3 Double-sided tape (adhesive layer)
4 Printing plate 4a One end (the tail end)
4b The other end (the tail end side)
5 Presser bar 5a Presser bar groove 6 Seal member 7 Nichrome wire 8 Cutting means

Claims (5)

A method of attaching a printing plate to a sleeve in an offset printing machine using a sleeve,
A protective layer forming step for forming a protective layer for protecting the outer peripheral surface of the sleeve on the outer peripheral surface of the sleeve;
An adhesive layer forming step for forming an adhesive layer for adhering the printing plate on the surface of the protective layer;
A method for attaching a printing plate to a sleeve, comprising a printing plate adhesion step for adhering the printing plate to the surface of the adhesive layer. In the protective layer forming step, the sleeve outer peripheral surface is covered with a heat shrink film, the heat shrink film is heated, and the heat shrink film is adhered to the sleeve outer peripheral surface to form the protective layer. A method for attaching the printing plate to the sleeve according to claim 1. The method for attaching a printing plate to a sleeve according to claim 1 or 2, wherein, in the adhesive layer forming step, the adhesive layer is formed by attaching a double-sided tape to the surface of the protective layer. The sleeve has a strip-shaped slit extending in the machine width direction of the outer peripheral surface of the sleeve, and engages the tail end and the tail edge side of the printing plate in the slit. A stop member is provided, and after the printing plate bonding step, the end side and the tail end side of the printing plate are locked by the locking member. The attachment method to the sleeve of the printing plate of any one. 5. The sealing member according to claim 1, wherein a seal member that closes the gap is mounted in a gap between the tail end and the tail edge side of the printing plate. How to attach the printing plate to the sleeve.

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