JP2006248585A - Method for transporting lithographic printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a method for transporting a lithographic printing plate which can be transported without giving a damage on a coating film. <P>SOLUTION: A skid 33 bearing a stacked bundle 31 placed thereon is made from aluminum to reduce the mass of the skid 33 into about 1/2 of that of an iron skid. The skid 33 is placed directly on a bed 50 of a vehicle so as not to use a wooden pallet. This eliminates the transmission of an elastic force of a pallet to the skid 33 when the stacked bundle 31 is transported by a vehicle, thus prevents the coating film of the stacked bundle 31 from receiving damage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for transporting a packed photosensitive lithographic printing plate.

  Photosensitive lithographic printing plates (hereinafter referred to as “PS plates” where appropriate) are generally subjected to surface treatments such as graining, anodizing, silicate treatment, and other chemical conversion treatments on a support such as a sheet-like or coil-like aluminum plate. Are performed alone or in appropriate combination, and then, after the photosensitive solution is applied and dried, it is cut into a desired size. This PS plate is subjected to plate making processing such as exposure, development processing, and gumming, and is set in a printing machine, and ink is applied to print characters, images, and the like on the paper surface.

  When handling this PS plate, in order to reduce the number of times the load is handled and to carry and store it at low cost, for example, in Patent Document 1, a large number of PS plates are stacked to form a bundle of PS plates, After the bundle is placed on an iron mounting table (hereinafter referred to as “skid”) and packaged, it is adjusted to the size of a wooden pallet (mounting table on which the skid 102 is mounted) 100 as shown in FIG. A plurality of skids 102 are placed on the pallet 100. Then, in a state where the plurality of skids 102 are placed, the pallet 100 is loaded on the truck bed 104 by a forklift or the like and transported to each user.

  On the other hand, although not shown, when the PS plate is developed by an automatic processor, the skid is transported to the PS plate installation unit by a forklift or the like in order to supply the PS plate to the setter unit that performs the exposure process.

  However, since the mass of this iron skid is about 100 kg, once the skid is placed on the PS plate installation part and then the PS plate is transferred by changing the size, the bundle of PS plates is transferred to a tray, The PS plates must be transshipped manually, which is inconvenient and inconvenient.

For this reason, it is conceivable to reduce the weight of the skid, but if the skid becomes lighter, the pallet on which the skid 102 is placed is made of wood and is elastic, and the elastic force of the pallet is amplified during transportation by truck, The coating film of the PS plate loaded on the pallet is damaged.
JP 2003-11970 A

  In view of the above facts, an object of the present invention is to provide a transportation method of a lithographic printing plate that can be transported without damaging the coating film.

  The invention according to claim 1 is a method for transporting a lithographic printing plate, in which the laminated body on which the lithographic printing plate is laminated is integrally packed in a state of being placed on a light metal mounting table having legs. The mounting table is directly mounted on a loading platform of a vehicle.

  In the first aspect of the present invention, the mounting table on which the stacked body is mounted is made of a light metal such as aluminum, magnesium, titanium, etc., so that the mass of the mounting table can be drastically reduced compared to an iron mounting table. it can. For this reason, it becomes possible to move a mounting base easily in the state in which the laminated body was mounted, and work efficiency improves.

  In addition, in a state where the laminate and the mounting table are packed together, the mounting table is directly mounted on the loading platform of the vehicle, and a wooden pallet is not used. Thereby, the elastic force of the pallet is not transmitted to the mounting table during transportation of the lithographic printing plate by the vehicle, and the coating film of the loaded lithographic printing plate is not damaged.

  According to a second aspect of the present invention, in the transport method of a lithographic printing plate according to the first aspect, the light metal is aluminum.

  In the second aspect of the present invention, the aluminum mounting table can reduce the mass of the mounting table to about ½ compared to the iron mounting table.

  Since the present invention is configured as described above, the mass of the mounting table can be drastically reduced as compared with an iron mounting table, so that the mounting table can be easily moved in a state where the stacked body is mounted. , Work efficiency is improved. In addition, when the laminate and the mounting table are packed together, the mounting table is mounted directly on the loading platform of the vehicle, and the wooden pallet is not used. The elastic force of the pallet is not transmitted to the mounting table, and the coating film of the loaded lithographic printing plate is not damaged.

  FIG. 1 shows a processing line 90 of a normal photosensitive lithographic printing plate (hereinafter referred to as “PS plate”). On the upstream side (upper right side in FIG. 1) of the processing line 90, a feeding machine 14 for sequentially unwinding the web 12 previously wound in a roll shape is disposed. The long web 12 delivered from the delivery machine 14 is curled and corrected by the leveler 15, and when it reaches the feed roll 16, the interleaf paper 18 is bonded together and brought into close contact by charging to reach the notch 20.

  The notch 20 is provided with a punching portion on the web 12 so that the upper blade of the cutting roll 24 constituting the cutting portion 10 can move in the width direction of the web 12 at the punching position. Accordingly, it is possible to change the cutting width of the web 12 while continuously cutting the web 12 and the interleaf paper 18 together. Hereinafter, the “width direction” simply refers to the width direction of the web 12 being transported (runs), and “inside” and “outside” refer to the inside and outside of the web 12 in the width direction, respectively. .

  On the other hand, cutting waste 86 (hereinafter referred to as “ear loss 86”) generated by cutting by the cutting unit 10 is sent to a chopper (not shown) and cut into small pieces, and then collected by the collection conveyor 82 into the collection box 84.

  The web 12 cut to a predetermined cutting width is detected by the length measuring device 26 and is cut by the running cutter 28 at the instructed timing. Thereby, the PS plate (product sheet) 30 having the set size is manufactured.

  Next, the PS plate 30 is sent to the stacking unit 34 by the conveyor 32 and stacked a predetermined number of times to form the stack 31. In the stacking unit 34, a protective sheet (generally referred to as “hit ball”) made of cardboard or the like can be disposed on the upper or lower side or one side of the stack 31.

  Then, the stack 31 is placed on a skid 33 (described later) through the transport unit 35. Then, it is sent to a storage such as a rack warehouse or a packaging process, and packaged with a packaging material (tape, interior material, exterior material, etc.).

  In addition, when stacking and packaging on these skids 33, an accumulation device for accumulating the bundles 31 on the skid 33 is provided in the processing line 90, and it is directly accumulated in the skid 33 in the processing line 90. Also good.

  Here, the slip sheet 18 is bonded to the web 12, but this is merely an example of the embodiment, and the slip sheet 18 is not always necessary. Similarly, the packaging material is not limited to this embodiment.

  By the way, the web 12 is preliminarily coated with an undercoat layer, a photosensitive layer, an overcoat layer, etc. as a so-called functional layer on a support made of aluminum (hereinafter referred to as “coating layer”). The formed surface is the image forming surface of the PS plate 30. Further, the web 12 is processed by the processing line 90 so as to have a desired size, so that the PS plate 30 usable for printing is obtained.

  Here, the aluminum plate (web 12) as the support is, for example, a JIS1050 material, a JIS1100 material, a JIS1070 material, an Al—Mg alloy, an Al—Mn alloy, an Al—Mn—Mg alloy, or an Al—Zr alloy. An alloy, an Al—Mg—Si alloy, or the like can be applied. In the manufacturing process of an aluminum plate at a manufacturer, an aluminum ingot that conforms to the above-mentioned standard is manufactured, the aluminum ingot is hot-rolled, and then subjected to a heat treatment called annealing, if necessary, by cold rolling. Finished with a strip-shaped aluminum plate.

  The specific configuration of the web 12 is not particularly limited. For example, by using a lithographic printing plate for a laser printing plate of a heat mode method and a photon method, a lithographic printing plate that can be directly made from digital data can be obtained. it can.

  The web 12 is formed with a coating layer on one surface of a thin aluminum support formed in a rectangular plate shape, and the coating layer is subjected to plate making processing such as exposure, development processing, and gumming. Characters, images, and the like are printed on a paper surface by being set in a printing machine and applied with ink.

Moreover, the web 12 can be made into a lithographic printing plate corresponding to various plate making methods by selecting various components in the photosensitive layer or the heat sensitive layer. Examples of specific embodiments of the lithographic printing plate of the present invention include the following embodiments (1) to (11).
(1) An embodiment in which the photosensitive layer contains an infrared absorber, a compound that generates an acid by heat, and a compound that crosslinks by an acid.
(2) An embodiment in which the photosensitive layer contains an infrared absorber and a compound that becomes alkali-soluble by heat.
(3) An embodiment in which the photosensitive layer includes two layers, a layer containing a compound that generates radicals upon irradiation with laser light, an alkali-soluble binder, and a polyfunctional monomer or prepolymer, and an oxygen blocking layer.
(4) An embodiment in which the photosensitive layer is composed of two layers of a physical development nucleus layer and a silver halide emulsion layer.
(5) A mode in which the photosensitive layer includes three layers of a polymer layer containing a polyfunctional monomer and a polyfunctional binder, a layer containing silver halide and a reducing agent, and an oxygen blocking layer.
(6) A mode in which the photosensitive layer includes two layers of a layer containing a novolac resin and naphthoquinone diazide and a layer containing silver halide.
(7) The aspect in which a photosensitive layer contains an organic photoconductor.
(8) A mode in which the photosensitive layer includes 2 to 3 layers including a laser light absorbing layer to be removed by laser light irradiation, and a lipophilic layer and / or a hydrophilic layer.
(9) A compound in which the photosensitive layer absorbs energy to generate an acid, a polymer compound having a functional group that generates a sulfonic acid or a carboxylic acid by an acid in the side chain, and an acid generator by absorbing visible light The aspect containing the compound which gives energy to.
(10) A mode in which the photosensitive layer contains a quinonediazide compound and a novolac resin.
(11) A mode in which the photosensitive layer contains a compound that decomposes by light or ultraviolet rays to form a crosslinked structure with itself or other molecules in the layer and an alkali-soluble binder.

  In particular, in recent years, a lithographic printing plate coated with a high-sensitivity photosensitive type coating film that is exposed with a laser beam or a thermosensitive type lithographic printing plate may be used (for example, the above-described (1) to (3)). Embodiment).

In addition, the wavelength of the laser beam here is not particularly limited. For example,
(A) A laser having a wavelength range of 350 to 450 nm (as a specific example, a laser diode having a wavelength of 405 ± 5 nm).
(B) A laser having a wavelength range of 480 to 540 nm (specific examples are an argon laser having a wavelength of 488 nm, a (FD) YAG laser having a wavelength of 532 nm, a solid laser having a wavelength of 532 nm, and a (green) He—Ne laser having a wavelength of 532 nm).
(C) A laser having a wavelength range of 630 to 680 nm (specific examples are a He—Ne laser having a wavelength of 630 to 670 nm and a red semiconductor laser having a wavelength of 630 to 670 nm).
(D) A laser having a wavelength range of 800 to 830 nm (as a specific example, an infrared (semiconductor) laser having a wavelength of 830 nm).
(E) A laser having a wavelength of 1064 to 1080 nm (specifically, a YAG laser having a wavelength of 1064 nm).

  Etc. Among these, for example, both of the laser beams in the wavelength regions (b) and (c) can be applied to both the lithographic printing plates having the photosensitive layer or the heat-sensitive layer of the above-described aspect (3) or (4). It is. Further, both of the laser beams in the wavelength range of (d) and (e) can be applied to both of the lithographic printing plates having the photosensitive layer or the heat-sensitive layer of the above-described aspect (1) or (2). Of course, the relationship between the wavelength range of the laser beam and the photosensitive layer or the heat-sensitive layer is not limited thereto.

  The shape of the web 12 is not particularly limited. For example, the photosensitive layer is formed on one or both sides of an aluminum plate having a thickness of 0.1 to 0.5 mm, a long side (width) of 650 to 3150 mm, and a short side (length) of 200 to 1500 mm. Or it can be a thing with which the heat sensitive layer was apply | coated.

The interleaving paper used may be a general one used for a lithographic printing plate, but typical examples are shown below. The specific configuration of the interleaf paper 18 is not limited as long as the coating film of the web 12 can be reliably protected. For example, paper using 100% wood pulp or synthetic pulp without using 100% wood pulp is used. And paper having a low density polyethylene layer on the surface of these papers can be used. In particular, paper that does not use synthetic pulp has a low material cost, so that the interleaf paper 18 can be manufactured at low cost. More specifically, the basis weight 20-55 g / m ² made from bleached kraft pulp, density 0.7-0.85 g / cm ³ , moisture 4-6%, Beck smoothness 10-800 seconds, PH 4-6 A slip sheet having an air permeability of 15 to 300 sec can be mentioned, but the present invention is not limited to this.

  Next, the operation of the PS plate transport method according to the embodiment of the present invention will be described.

  In the processing line 90 of the lithographic printing plate, the stacked bundle 31 placed on the skid 33 has a top plate 40 placed on the top as shown in FIG. After being broken, the band 44 is wound, and the skid 33 and the integrated bundle 31 are integrated.

  The skid 33 is made of aluminum, and is provided with a mounting plate 46 on which the stacked bundle 31 can be mounted. The mounting plate 46 is formed so as to be larger than the size of the stacking bundle 31. From the back surface of the mounting plate 46, leg portions that are formed in a substantially rectangular parallelepiped shape on each corner side of the mounting plate 46. Each 48 is drooping.

  A forklift (not shown) fork or the like can be inserted between the leg 48 and the leg 48 when the stack 31 is transported, and the skid 33 is lifted and transported by the forklift. The skid 33 is directly loaded on the truck bed 50 and transported to each user in a fixed state so as not to move in the horizontal direction.

  Thus, by forming the skid 33 on which the stacked bundle 31 is placed with aluminum, the mass of the skid 33 can be reduced to about ½ compared to the iron skid.

  If the aluminum skid 33 is transported by truck with the pallet placed on the pallet, the pallet is elastic because it is made of wood, so the elastic force of the pallet is smaller than the iron skid when transporting by truck. Will be amplified, and the coating film of the PS plate 30 loaded on the pallet will be damaged.

  However, in the present invention, as shown in FIG. 3, the wooden pallet 100 is not used unlike FIG. 6 by placing the skid 33 directly on the loading platform 50 of the vehicle. Thus, the elastic force of the pallet 100 is not transmitted to the skid 33 during transportation of the integrated bundle 31 by the vehicle, and the coating film of the integrated bundle 31 is not damaged.

  In addition, since the mass of the skid is drastically reduced as compared with an iron skid, the skid 33 can be moved without a forklift, and work efficiency can be improved.

  For example, when the PS plate 30 (see FIG. 1) is developed by an automatic processor (not shown), the PS plate 30 shown in FIGS. 4 and 5 is installed by a forklift or the like in order to supply the PS plate 30 to a setter unit that performs exposure processing. The skid 33 is transported to the part 52.

  In the PS plate installation section 52, the skids 33 are installed in two upper and lower stages so as not to overlap each other in the vertical direction. A pair of rails 56 are provided in the upper installation part 54 located at the upper part so as to extend above the lower installation part 58. A holding frame 60 is slidable on the rail 56.

  The holding frame 60 can be brought into contact with the outer edge side of the rear surface of the mounting plate 46 of the skid 33 so that the skid 33 is held in a state of being caught by the holding frame 60. In this way, the skid 33 held by the holding frame 60 can be placed on the upper portion of the lower installation portion 58 by the sliding movement of the holding frame 60.

  On the other hand, a supply unit 64 that sucks the PS plate 30 by a plurality of suction devices 62 and supplies the PS plate 30 to a setter unit (not shown) is provided above the lower installation unit 58. The PS plate 30 located at 58 is sucked.

  For this reason, in the case of the skid 33 arranged in the upper installation part 54, the PS plate 30 is sucked by the supply unit 64 in a state where the holding frame 60 is moved and the skid 33 is arranged on the upper part of the lower installation part 58. It will be.

  Thus, by drastically reducing the mass of the skid, it is possible to move the skid 33 via the holding frame 60 in the upper installation portion 54, and work efficiency can be improved.

  In addition, the said embodiment is an example and can be implemented in various changes within the range which does not deviate from a summary. For example, in this embodiment, the example in which the skid 33 is formed of aluminum has been described. However, since the skid may be formed of a light metal, magnesium, titanium, or the like may be used.

It is the schematic which shows the processing line of the lithographic printing plate which concerns on embodiment of this invention. It is a perspective view which shows the state packaged integrally with the skid in the state which accumulated the planographic printing plate which concerns on embodiment of this invention. FIG. 3 is a front view of FIG. 2. It is a perspective view which shows the PS plate installation part for supplying the lithographic printing plate which concerns on embodiment of this invention to a setter part. FIG. 5 is a front view of FIG. 4. FIG. 4 is a conventional front view corresponding to FIG. 3.

Explanation of symbols

30 PS plate 31 Stacked bundle (laminate)
33 Skid (mounting table)

Claims (2)

  The laminated body on which the planographic printing plates are laminated is packed together in a state where it is placed on a light metal mounting table having legs, and then the mounting table is directly mounted on the loading platform of the vehicle. Transport method for lithographic printing plates.   2. The method for transporting a lithographic printing plate according to claim 1, wherein the light metal is aluminum.

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