JP2006256639A - Packing structure for lithographic printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a packing structure for a lithographic printing plate which allows a stacked bundle of the plates to be fixed to a bearing board with the corners of the stacked bundle being prevented from deforming without using a stiffening plate. <P>SOLUTION: A buffering member 84 is put against the laminated surface of the stacked bundle 58 placed on the bearing board 50. A stretch film 38 is wrapped around over the bearing board 50, the stacked bundle 58, and the cushioning member 84, which are put together, to fix the stacked bundle 58 and the cushioning member 84 on the bearing board 50. As a result, a contracting force acting on the lithographic printing plates 10 is relaxed by the cushioning member 84, which prevents a large contacting force from acting on the lithographic printing plates 10, thus preventing the distortion or deformation of the lithographic printing plates 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging structure for a lithographic printing plate, for example, a packaging structure for a lithographic printing plate for handling a large amount of lithographic printing plates in a lump.

  In recent plate-making methods (including electrophotographic plate-making methods), lithographic printing plates (such as photosensitive printing plates and heat-sensitive printing plates) that are widely used to facilitate the automation of plate-making processes have a thin support. A photosensitive layer or a heat-sensitive layer is applied on a body (aluminum plate or the like).

  When handling this lithographic printing plate, a large number of lithographic printing plates are stacked in the thickness direction to form a bundle of lithographic printing plates in order to reduce the number of times of handling and transport and store at a low cost. A bundle may be loaded and packaged on a loading member such as a pallet.

  FIG. 5 shows an example of such a packing structure (Patent Document 1). In this packing structure 110, after an end plate 114 standing upright with respect to the bottom plate 112 is put on a bundle 118 of a required number of printing plates 116, another end plate 120 (hereinafter referred to as “abutting plate 120”). ”) Is applied to the surface side of the bundle 118, and then the end plate 114 and the end plate 120 are fastened by the bolt 122 to fix the bundle 118.

  On the other hand, since both the photosensitive printing plate and the thermal printing plate are formed as a single thin plate, if there are scratches or deformations in the corners or sides, the image will be blurred when developed due to photosensitivity or heat. Or problems such as non-uniform ink when printing.

  For this reason, the contact plate 120 has a size larger than that of the printing plate 116 and protects the printing plate 116 so that the corners and sides of the printing plate 116 are not damaged or deformed.

However, since the contact plate 120 is in contact with the entire front surface of the bundle 118, the weight increases, and the bundle 118 is recovered when the bundle 118 is fixed or released, transported, or recovered. Handling was sometimes inconvenient.
JP-A-3-73946

  In view of the above facts, an object of the present invention is to obtain a packing structure for a lithographic printing plate that can be fixed to a mounting table without using a patch plate and without deforming the corners of the stacked bundle.

  The invention according to claim 1 is a lithographic printing plate packaging structure, a mounting table that supports a laminated surface of a laminated bundle in which the lithographic printing plates are laminated, and a backrest that stands up from the preceding table and supports the printed surface of the laminated bundle. And a buffer member that is provided on three stacked surfaces of the stacked bundle mounted on the mounting table and is elastically deformable, and the buffer member, the stacked bundle, and the mounting table are integrally formed by contraction force. It is characterized by having a stretchable film to be packaged, and a leg body to which the lower part of the mounting table can be fixed and into which a cargo receiving member of the transport device can be inserted.

  In the first aspect of the invention, a backrest that rises from the mounting table is provided, the stacked surface of the stacked bundle is supported by the mounting table, and the printing surface of the stacked bundle is supported by the backrest. In other words, by arranging the stacked bundles in a so-called vertical arrangement, the entire packaging structure has a substantially constant height regardless of the number of lithographic printing plates. It can be efficiently stored without causing it.

  Further, since the lithographic printing plate is placed with the stacking surface on the placement table side aligned by its own weight, for example, the operation of loading the lithographic printing plate into the plate making machine becomes easy. Furthermore, the stacking bundle is leaned against the backrest, and the load of the stacking bundle is distributed over the two surfaces of the mounting table and the backrest, so that the stacking bundle will not fall down accidentally or slide down in the unpacked state. I am doing so.

  Here, a buffer member is provided on three stacked surfaces of the stacked bundle in a state where the stacked bundle formed by stacking the planographic printing plates is mounted on the mounting table. In this state, the buffer member, the stacked bundle, and the mounting table are wound with an elastic film, and the buffer member, the stacked bundle, and the mounting table are integrally packaged by the contraction force of the elastic film.

  Thus, in order to wind the buffer member, the stacked bundle and the mounting table with the elastic film in a state where the stacked bundle is mounted on the mounting table and the buffer member is provided on the three stacked surfaces of the stacked bundle, The shrinkage force acting on the lithographic printing plate to be formed is relaxed by the buffer member, so that a large shrinkage force does not act on the lithographic printing plate, and the lithographic printing plate can be prevented from being distorted or deformed. .

  Therefore, there is no problem that the image is blurred when developed due to photosensitivity or heat sensitivity, or the ink becomes non-uniform when printed. That is, according to the present invention, it is possible to fix the laminated bundle to the mounting table without using the contact plate without damaging the laminated bundle.

  In addition, the stretchable film is wound in a state where the laminated bundle is placed on the placing table, and the laminated bundle and the placing table are integrally fixed by the contraction force of the stretchable film. Will not be displaced from the mounting table, and will not be separated or dropped from the mounting table.

  Further, since the stretchable film is simply wound around the buffer member, the laminated bundle and the mounting table, it can be easily packed. In addition, since a backing plate is not required, even when the laminated bundle is composed of a large lithographic printing plate, the load at the time of packing and unpacking the laminated bundle is reduced and the laminated body is packed. It is possible to reduce the amount of reuse members required for the process.

  Furthermore, when unpacking, the stretchable film only needs to be removed by cutting with a cutter or the like, so that workability is also good. Further, since a plurality of laminated bundles can be fixed on the mounting table by winding an elastic film, a large amount of planographic printing plates can be handled with a small number of times of handling.

  By the way, since lithographic printing plates generally have a wide variety of sizes, the size is divided into several zones, and several product sizes are shared by several types of mounting tables. For this reason, a step is generated between the mounting table and the laminated bundle, and in the side-winding fastening method using the stretchable film, the fastening force is reduced, but by placing the buffer member so as to fill the step. Further, it is possible to prevent the fastening force from being lowered and to secure a strong fastening.

  On the other hand, a leg body into which a load receiving member of a transport device can be inserted can be fixed to the lower part of the mounting table, and a stacked bundle wrapped with an elastic film can be transported.

  In the state where the legs are integrated with the lower part of the mounting table in advance, when the laminated bundle is wound together with the mounting table with an elastic film, the legs become an obstacle, or a load receiving member of a transport device such as a forklift is inserted. Possible leg insertion parts are blocked by the elastic film, and in any case, workability is poor.

  For this reason, after packaging a laminated bundle and a mounting base integrally with an elastic film, the above problems can be solved by fixing the legs to the lower part of the mounting base, and work efficiency is improved. improves.

  Since the present invention has the above-described configuration, the cushioning member, the stack of bundles, and the mounting table are stretchable in a state where the buffering members are provided on the three stacked surfaces of the stacked bundle in a state where the stacked bundle is mounted on the mounting table. Since the film is wound with a film, the shrinkage force acting on the lithographic printing plate constituting the laminated bundle is relaxed by the buffer member, so that no large shrinkage force acts on the lithographic printing plate, and the lithographic printing plate is distorted or deformed. Can be prevented. For this reason, according to this invention, it can fix to a mounting base in the state which does not damage a lamination | stacking bundle, without using a backing plate.

  1 and 2, a packing structure (hereinafter simply referred to as “packing structure”) 30 in which a laminated bundle 12 of a planographic printing plate 10 (photosensitive printing plate or heat-sensitive printing plate) according to an embodiment of the present invention is packed is illustrated. It is shown.

  The planographic printing plate 10 is formed by applying an electrophotographic photosensitive layer (a heat-sensitive layer in the case of a heat-sensitive printing plate) on a thin aluminum support formed in a rectangular plate shape. The shape and the like of the lithographic printing plate 10 are not particularly limited, but in the present embodiment, as an example, a plate in which a photosensitive layer or a heat-sensitive layer is applied on an aluminum plate of 0.3 mm × 1310 mm × 1050 mm is used.

  As can be seen from FIG. 4, the interleaf paper 14 for protecting the electrophotographic photosensitive layer and the planographic printing plate 10 are alternately stacked in the thickness direction, and the protective cardboard 22 is provided on both end faces in the overlapping direction. The laminated bundle 12 of the lithographic printing plate 10 is arranged.

In this embodiment, the basis weight 20-45g / m < ² > made from bleached kraft pulp, the density 0.7-0.85g / cm < ³ >, the water | moisture content 4-6%, and Beck smoothness 10-800 second are used as the interleaving paper 14. , PH4-6 interleaf paper 14 is used, and this interleaf paper 14 is brought into close contact with the electrophotographic photosensitive layer of the lithographic printing plate 10. Moreover, as the cardboard 22 for protection, the basis weight 200-1500g / m < ² > made from waste paper, density 0.7-0.85g / cm < ³ >, moisture 4-8%, Beck smoothness 3-20 seconds, PH4- Six protective cardboards 22 are used.

  The number of lithographic printing plates 10 constituting one laminated bundle 12 is not particularly limited, but may be, for example, 10 to 100 from the viewpoint of efficiency of transportation and storage. Further, when the laminated bundle 12 is constituted by 10 to 100 lithographic printing plates 10 as described above, although not shown, an adhesive tape or the like is used to prevent the lithographic printing plate 10 and the protective cardboard 22 from shifting. It is preferable to fix these with fixing means.

  It is also possible to configure the laminated bundle 12 with more lithographic printing plates 10 so that they can be transported and stored more efficiently (with a small number of times of handling of cargo). In this case, for example, the number of the lithographic printing plates 10 is about 200 to 2000, and the protective cardboard 22 is inserted not only at the top and bottom of the laminated lithographic printing plates 10 but also every 20 to 100 lithographic printing plates 10. It may be. Further, depending on the type of the lithographic printing plate 10, the interleaf paper 14, the protective cardboard 22, and the adhesive tape may be omitted.

  On the other hand, as shown in FIGS. 1 and 2, the carrying member 68 for carrying the laminated bundle 12 includes a placement portion 70 and a leg body 72, and the placement portion 70 and the leg body 72 are formed by bolts 74. It becomes one by fastening.

  The mounting unit 70 includes a mounting table 50 and a support plate (backrest) 54, and an angle formed by the mounting surface 50A and the support surface 54A forms a right angle. The mounting table 50 extends to the back side of the support plate 54, and a screw hole 78 into which the bolt 74 can be screwed is formed in the extended portion (extending portion 76). A screw hole 78 into which the bolt 74 can be screwed is formed on the opposite side of the extending portion 76 of the mounting table 50 in correspondence with the screw hole 78.

  On the other hand, the leg body 72 includes a substantially rectangular upper plate 40, a lower plate 42, a leg portion 44 that connects the upper plate 40 and the lower plate 42, and a side end surface of the upper plate 40 has a substantially wedge shape. A fastening base 80 is provided. The leg portions 44 are disposed at the corners and the central portion of the peripheral portions of the upper plate 40 and the lower plate 42, and a gap is provided between the adjacent leg portions 44 and the leg portions 44 to form an insertion portion 48. A fork of a forklift or a handlift can be inserted into the insertion portion 48, and the conveying member 68 can be lifted by the fork.

  Further, screw holes 82 into which bolts 74 can be screwed are formed at both ends along the inclined surface of the fastening table 80, and are provided corresponding to the screw holes 78 of the mounting table 50. In a state where the mounting table 50 is fastened to the fastening table 80, the mounting surface 50 </ b> A of the mounting table 50 is inclined along the slope of the upper surface of the fastening table 80. Specifically, the support plate 54 is located on the top side of the fastening base 80, and is inclined so that the support surface 54A of the support plate 54 faces obliquely upward.

  By the way, the laminated bundle 12 is integrally provided with an interior paper 16. Hereinafter, the laminated bundle 12 that has been installed will be referred to as a laminated bundle 58. Here, although one bundle of stacked bundles 12 is illustrated, a plurality of (for example, 3 to 100 bundles) laminated bundles 12 may be integrally provided.

  The interior paper 16 is formed by sticking a metal thin film having a predetermined thickness on a rectangular kraft paper having a predetermined size, and in some cases, a resin layer having a predetermined thickness may be formed on the metal thin film. It is composed by pasting together.

  In general, a photosensitive printing plate has high photosensitivity, and even when exposed to light in a slight visible light wavelength band, a change occurs in the photosensitive layer, so that it is necessary to shield it from light. Further, the heat-sensitive printing plate is also preferably subjected to appropriate light shielding because the heat-sensitive layer may be altered by the thermal energy of the light hit or the sensitivity may change due to the progress of the reaction.

  Furthermore, if a sudden humidity change or temperature change is applied, any printing plate may have a disadvantage such as dew formation on the photosensitive layer or the heat-sensitive layer, or deterioration of the printing plate or adhesion to the interleaf 14. It becomes necessary to prevent moisture. Since the interior paper 16 is configured as described above and has a certain light-shielding property and moisture-proof property, alteration of the photosensitive layer or the heat-sensitive layer of the planographic printing plate 10 is prevented, and the planographic printing plate 10 is maintained at a constant quality. Is done.

  In the present embodiment, as an example of the interior paper 16, an aluminum foil having a thickness of 6 to 7 μm is formed on the kraft paper that is sufficiently large to integrally package the plurality of laminated bundles 12 placed on the placement surface 50 </ b> A. Attached material is used.

  In addition, a low-density polyethylene layer having a thickness of 10 to 70 μm is adhered to the aluminum foil, or a black polyethylene film having a thickness of about 70 μm is further adhered to the low-density polyethylene layer to improve the light-shielding property and moisture-proof property. May be used. Moreover, if the interior paper 16 can exhibit a certain light-shielding property and moisture-proof property, the low-density polyethylene layer and the black polyethylene film do not necessarily have to be attached.

  In such a state that the laminated bundle 12 is integrally built by the interior paper 16 and is placed on the placement table 50, the end of the interior paper 16 is supported by the mounting table 50 and the support by an adhesive means such as an adhesive tape (not shown). Secured to the plate 54.

  And the flat buffer member 84 is applied to the lamination surface (three directions excluding the placement surface 50A side) of the stacked bundle 58 placed on the placement table 50, and the placement table 50 is formed by the ring-shaped stretch film 38. In a state where the laminated bundle 58 and the buffer member 84 are integrated, the side surface of the laminated bundle 58 is wound (so-called side winding), and the laminated bundle 58 and the buffer member 84 are fixed to the mounting table 50.

  As the buffer member 84, a rubber plate, foam material, cardboard, cardboard, Hamicam structured paper, or the like can be used. Further, as the stretch film 38, a film having a thickness of 35 μm and a width of 750 mm, which is self-adhesive made of a material LLDPE (linear low density polyethylene), was used at an elongation rate of 200%.

  When the self-adhesive material is used as described above, the portions where the stretch films 38 are overlapped with each other can be kept attached to each other without using an adhesive or a fastener. The stretch film 38 is made of a stretchable material in a thin film shape. When the stretch film 38 is pulled within a range that does not exceed the yield point, the stretch film 38 contracts with a contraction force of a certain value or more without stretching.

  The stretch film 38 is wound over the entire surface 50A of the mounting table 50 on which the stacked bundle 58 is mounted. Thereby, the shrinkage force of the stretch film 38 can be applied as a force for pressing the laminated bundle 58 over the entire surface of the placement surface 50 </ b> A, and the laminated bundle 58 can be firmly fixed to the placement table 50.

  The shape of the stretch film 38 is not limited as long as the stretch film 38 can be wound around the mounting table 50 and the laminated bundle 58 in the stretched state. For example, the roll-shaped stretch film 38 is continuously stacked a plurality of times. And one or a plurality of sheet-like stretch films 38 may be wound around the mounting table 50 and the laminated bundle 58, respectively.

  Further, the stretchable film of the present invention is not limited to the stretch film 38 described above. That is, the material, the elongation rate, the size, and the like are not limited as long as the contraction force can be exerted in the stretched state by having elasticity and the laminated bundle 58 can be fixed to the mounting table 50.

  For example, the main raw material is polyvinyl chloride with a plasticizer added thereto, a multilayer structure of polyethylene and polyvinyl acetate, the main raw material is polyethylene, and the above-described LLDPE (linear low Density polyethylene).

  Next, the effect | action of the packing structure 30 of this embodiment is demonstrated.

  As shown in FIGS. 1 and 2, the buffer member 84 is applied to the stacked surface of the stacked bundle 58 placed on the mounting table 50, and the mounting table 50, the stacked bundle 58 and the buffer member 84 are integrated. Thus, the side film is wound with the stretch film 38, and the laminated bundle 58 and the buffer member 84 are fixed to the mounting table 50.

  As a result, as shown in FIG. 3, the shrinkage force (indicated by phantom lines) acting on the lithographic printing plate 10 is relaxed by the buffer member 84, and a large shrinkage force directly acts on the lithographic printing plate 10. Therefore, it is possible to prevent the lithographic printing plate 10 from being distorted or deformed.

  Therefore, there is no problem that the image is blurred when developed due to photosensitivity or heat sensitivity, or the ink becomes non-uniform when printed. That is, according to the present invention, it is possible to fix the stacked bundle 58 to the mounting table 50 without damaging the laminated plate 58 without using the contact plate 120 (see FIG. 5).

  As shown in FIGS. 1 and 2, the stretch film 38 is wound in a state where the laminated bundle 58 is placed on the placing table 50, and the laminated bundle 58 and the placing table 50 are wound by the contraction force of the stretch film 38. Therefore, the stacked bundle 58 is not inadvertently displaced from the mounting table 50, and is not separated from the mounting table 50 or dropped off.

  Moreover, since the stretch film 38 is simply wound around the mounting table 50, the laminated bundle 58, and the buffer member 84, it can be easily packed. In addition, since the contact plate 120 is not required, even when the laminated bundle 58 is constituted by the large-sized planographic printing plate 10, the load at the time of packing and unpacking the laminated bundle 58 is reduced, and the laminated bundle is reduced. The amount of reuse members required for packing 58 can be reduced.

  Furthermore, when unpacking, it is only necessary to cut and remove the stretch film 38 with a cutter or the like, so that workability is also good. Further, since the stretched film 38 can be wound to fix the plurality of laminated bundles 58 to the mounting table 50, a large amount of the lithographic printing plate 10 can be handled with a small number of times of handling.

  By the way, since the lithographic printing plate 10 generally has a wide variety of sizes, the size is divided into several zones, and several types of mounting tables 50 share several product sizes. Therefore, a step is generated between the mounting table 50 and the laminated bundle 58, and in the side-winding fastening method using the stretch film 38, the fastening force is reduced, but the buffer member 84 is filled so as to fill the step. By arrange | positioning, the fall of a fastening force can be prevented and a firm fastening can be ensured.

  On the other hand, in a state where the legs 72 are integrated with the lower portion of the mounting table 50 in advance, the legs 72 become an obstacle when the laminated bundle 58 is wound together with the mounting table 50 with the stretch film 38, or a forklift (conveying device). ) Or the like, the insertion portion 48 of the leg 72 into which the fork (load receiving member) can be inserted is blocked by the stretch film 38, and in any case, workability is poor.

  For this reason, such a problem is solved by fixing the leg body 72 to the lower part of the mounting table 50 after the laminated bundle 58, the buffer member 84, and the mounting table 50 are integrally packaged with the stretch film 38. Work efficiency can be improved.

  Further, in a state where the fastening base 80 is substantially wedge-shaped and the mounting base 50 is fastened to the fastening base 80, the mounting base 50 and the support plate 54 are inclined, the stacked bundle 58 is leaned against the support plate 54, and the load of the stacked bundle 58 is Is dispersed on two surfaces of the mounting table 50 (supporting the laminated surface of the laminated bundle 58) and the support plate 54 (supporting the printing surface of the laminated bundle 58), so that the laminated bundle 58 is unpacked. Can be prevented from inadvertently falling down or sliding down.

  Further, the laminated surface of the lithographic printing plate 10 constituting the laminated bundle 58 is supported by the mounting table 50, the printing surface of the lithographic printing plate 10 is leaned against the support plate 54, and the laminated bundle 58 is arranged in a so-called vertical arrangement. Regardless of the number of printing plates 10, the overall height of the packaging structure 30 can be made substantially constant. For this reason, the lithographic printing plate 10 can be efficiently stored without creating a useless space above the lithographic printing plate 10 at the storage location.

  In addition, since the planographic printing plate 10 is placed with its stacking surface on the mounting table 50 side aligned by its own weight, for example, the operation of loading the planographic printing plate 10 into the plate making machine becomes easy.

Note that the packaging structure 30 described above is merely an example, and the present invention is not limited thereto. For example, in the packaging structure 30 described above, the laminated bundle 58 is partially covered without being completely covered by the stretch film 38. However, the laminated bundle 58 may be completely covered with the stretch film 38. Further, the stretch film 38 may be wound only partially as long as the laminated bundle 58 is securely fixed to the transporting member 68 so that it is not inadvertently displaced or dropped.

  Furthermore, you may make it fix the lamination | stacking bundle | flux 58 to the mounting base 50 by shrink packaging other than stretch packaging.

It is a perspective view which shows the packing structure of the lithographic printing plate which concerns on embodiment of this invention. It is a disassembled perspective view which shows the packing structure of the lithographic printing plate which concerns on embodiment of this invention. It is explanatory drawing which shows the effect | action of the packing structure of the lithographic printing plate which concerns on embodiment of this invention. FIG. 3 is a cross-sectional view showing an internally laminated stack of the planographic printing plate of the present invention. It is a perspective view which shows the packaging structure of the conventional lithographic printing plate.

Explanation of symbols

10 Planographic printing plate 12 Stacked bundle 30 Packing structure 38 Stretch film (elastic film)
50 Mounting table 54 Support plate (backrest)
58 Stacked Bundle 70 Placement Unit 72 Leg 84 Shock Absorbing Member

Claims (1)

A mounting table for supporting the laminated surface of the laminated bundle of laminated planographic printing plates;
A backrest that rises from the mounting table and supports the printed surface of the stack of bundles;
A cushioning member provided on three stacked surfaces of the stacked bundle mounted on the mounting table and capable of elastic deformation;
A stretchable film that integrally wraps the cushioning member, the laminated bundle and the mounting table by a shrinkage force;
The lower part of the mounting table can be fixed, and the leg body into which the load receiving member of the transport device can be inserted,
A lithographic printing plate packaging structure characterized by comprising:

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