JP4322406B2 - Lithographic printing plate packaging box and lithographic printing plate packaging structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lithographic printing plate packaging box for containing and packaging a lithographic printing plate therein, and to a lithographic printing plate packaging structure using the lithographic printing plate packaging box, and more particularly to the contained lithographic printing The present invention relates to a lithographic printing plate packaging box and a lithographic printing plate packaging structure capable of reliably protecting a plate from external force.
[0002]
[Prior art]
In recent plate making methods (including electrophotographic plate making methods), lithographic printing plates such as photosensitive printing plates and heat-sensitive printing plates are widely used in order to facilitate automation of the plate making process. A lithographic printing plate is generally obtained by performing surface treatment such as graining, anodizing, silicate treatment, and other chemical conversion treatments on a support such as a sheet-like or coil-like aluminum plate alone or in combination, and then a photosensitive layer. Or it manufactures by cut | disconnecting to a desired size, after performing a heat-sensitive layer (these are collectively called "coating film") and a drying process. This lithographic printing plate is subjected to plate making processing such as exposure, development processing, and gumming, and is set in a printing machine and coated with ink, whereby characters, images, etc. are printed on the paper.
[0003]
These lithographic printing plates (photosensitive printing plates and heat-sensitive printing plates) are all in the form of a single thin plate. Therefore, if there are scratches or deformations in the corners, sides, or interior, Problems such as blurred images during development and non-uniform ink when printed are likely to occur.
[0004]
In order to prevent such scratches and deformations, a cardboard box for packaging a lithographic printing plate while protecting it from external force has been proposed (see Japanese Patent Laid-Open No. 10-16946).
[0005]
As shown in FIG. 10, this corrugated cardboard box 150 has a triangular tubular body 154 formed by bending two opposite sides of the bottom plate 152 so that the squareness of the bottom plate 152 with respect to the side plate 156 and the face plate 158 is strongly increased. It is maintained and the shape is not destroyed by the weight of the contents.
[0006]
Further, in this cardboard box 150, since the triangular cylindrical body 154 is located outside the two sides (short sides) of the accommodated lithographic printing plate, even if an external force acts on the short side of the lithographic printing plate, The cylindrical body 154 absorbs the energy of this external force, and can prevent the lithographic printing plate from being scratched or deformed.
[0007]
However, the triangular cylindrical body 154 is provided only at a position corresponding to the short side of the accommodated lithographic printing plate (that is, two sides), and one sheet is provided at a position corresponding to the long side of the lithographic printing plate. Only corrugated cardboard is arranged. Accordingly, when an external force is applied to the long side of the lithographic printing plate in a state where the lithographic printing plate is accommodated and packaged in the cardboard box 150, this energy cannot be absorbed by one cardboard and the lithographic printing plate is damaged. Deformation may occur and the lithographic printing plate cannot be reliably protected.
[0008]
[Problems to be solved by the invention]
In view of the above facts, an object of the present invention is to obtain a lithographic printing plate packaging box and a lithographic printing plate packaging structure that can reliably protect the lithographic printing plate.
[0009]
[Means for Solving the Problems]
  The invention according to claim 1 is a lithographic printing plate packaging box for containing and packaging a lithographic printing plate therein,A bottom plate portion having a size larger than that of a lithographic printing plate and a bent portion extending from each side of the bottom plate portion integrally with the bottom plate portion and having a certain thickness with the same material as the bottom plate portion are folded. A folded laminated part that absorbs the energy of external force by being arranged so as to surround the lithographic printing plate corresponding to each side of the lithographic printing plate that is laminated and placed on the bottom plate part, and the two opposed folded parts A lid plate portion that further extends from the laminated portion and covers the planographic printing plate accommodated on the bottom plate portion and inside the bent laminated portion;It is characterized by having.
[0010]
  That is, in this lithographic printing plate packaging box,The lithographic printing plate is placed on the bottom plate portion having a size larger than that of the lithographic printing plate, and the folded laminated portion surrounds the lithographic printing plate corresponding to each side of the lithographic printing plate,A lithographic printing plate is packaged. For example,Accommodating multiple lithographic printing platesSince it can be packaged, the handling of the cargo becomes easy.
[0011]
  The packaging box for lithographic printing platesPlaced on the bottom plateCorresponding to each side of the lithographic printing plate, a plurality of protective members are arranged so as to surround the lithographic printing plate. Therefore, when an external force is applied from the outside, the energy of the external force can be absorbed corresponding to all sides of the lithographic printing plate, and the packaged lithographic printing plate can be reliably protected. Moreover, two opposingThe lithographic printing plate is further extended from the bent portion and covered on the bottom plate portion and inside the bent laminated portion.The covered lithographic printing plate can be covered by the cover plate portion.The folded laminated part is extended from each side of the bottom plate part integrally with the bottom plate part with a certain thickness by the same material as the bottom plate part, and the lid plate part is further extended from the folded laminated part.Since it is extended, the number of parts is reduced, and the work of assembling a lithographic printing plate packaging box is facilitated.
[0020]
  In the invention according to claim 2,A lithographic printing plate packaging box according to claim 1,SaidFolded layersProvided at the butting part ofLithographic printing plate packaging boxAnd a non-linear portion that blocks a straight path from the outside to the inside.
[0021]
  Abutting part between folded laminated partsHas a non-linear part,Lithographic printing plate packaging boxBlocking a straight path from the outside to the inside. In general, light goes straight, like thisLithographic printing plate packaging boxBy blocking the linear path from the outside to the inside, light outside the lithographic printing plate packaging box is prevented from entering the inside of the lithographic printing plate packaging box. Thereby, the lithographic printing plate accommodated and packaged in the lithographic printing plate packaging box is surely shielded from light. Moreover, since a separate member for light shielding is not required, the lithographic printing plate can be light-shielded and packaged at low cost.
[0022]
  Claim 3In the invention described in claim 1, the planographic printing plate and the planographic printing plate are housed and packaged inside.Or claim 2And a packaging box for a lithographic printing plate as described in 1. above.
[0023]
Therefore, when an external force is applied to the lithographic printing plate packaging box, the energy of the external force can be absorbed corresponding to all sides of the lithographic printing plate, and the packaged lithographic printing plate can be reliably protected.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a process of accommodating a laminated bundle 12 of lithographic printing plates 10 in a lithographic printing plate packaging box 30 according to an embodiment of the present invention. Further, in FIG. 2, the planographic printing plate packaging box 30 is shown in a developed view.
[0025]
The planographic printing plate 10 is coated with a coating film (a photosensitive layer in the case of a photosensitive printing plate and a thermal layer in the case of a thermal printing plate) on a thin aluminum support formed in a rectangular plate shape. Is formed. The coating film is subjected to plate making processing such as exposure, development processing, and gumming, set in a printing machine, and ink is applied to print characters, images, and the like on the paper. Note that the lithographic printing plate 10 of the present embodiment is a stage before processing (exposure, development, etc.) necessary for printing, and is sometimes referred to as a lithographic printing plate precursor or a lithographic printing plate material. Sometimes.
[0026]
The shape or the like of the lithographic printing plate 10 is not particularly limited. For example, the photosensitive layer is formed on one surface of an aluminum plate having a thickness of 0.12 to 0.5 mm, a long side (width) of 300 to 2050 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.
[0027]
The laminated sheet 12 of the lithographic printing plate 10 is configured by alternately stacking the interleaf paper 14 and the lithographic printing plate 10 that protect the coating film in the thickness direction, and further disposing the protective cardboard 22 on the upper and lower surfaces. Has been. The protective cardboard 22 is preferably fixed to the lithographic printing plate 10 at a predetermined location (preferably a plurality of locations) on opposite sides of the lithographic printing plate 10 by a fixing means such as an adhesive tape so as not to be displaced.
[0028]
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. It is also possible to configure the laminated bundle 12 with more lithographic printing plates 10 so that it can be transported and stored more efficiently (with a small number of times of handling of cargo). The protective cardboard 22 may be arranged for each predetermined number of lithographic printing plates 10 so that the lithographic printing plate 10 can be protected more reliably. Further, depending on the type of the lithographic printing plate 10, the interleaf paper 14 and the protective cardboard 22 may be omitted. Further, the laminated bundle 12 may be provided with interior paper having a predetermined light-shielding property and moisture-proof property.
[0029]
The lithographic printing plate packaging box 30 is made of corrugated cardboard, and has a bottom plate portion 32 having a size larger than that of the lithographic printing plate, as can be seen from the development shown in FIG. Bending portions 34 and 36 extend from the long side 32L and the short side 32S of the bottom plate portion 32, respectively. Further, a cover plate portion 38 is extended from the bent portion 34 on the long side.
[0030]
A plurality of fold lines 40 that are parallel to the long side 32 </ b> L and the short side 32 </ b> S of the bottom plate portion 32 are formed in the bent portions 34 and 36 at regular intervals. The folding portions 34 and 36 are alternately folded a plurality of times at these folding lines 40 by valley folding (folding lines 40 for valley folding are indicated by a one-dot chain line) and mountain foldings (folding lines 40 for mountain folding are indicated by a two-dot chain line). By repeating the valley fold twice and the mountain fold twice in this embodiment, as shown in FIGS. 4A and 4B, the periphery of the upper surface of the bottom plate portion 32 (part corresponding to four sides) In addition, folding laminated portions 42 and 44 in which cardboards are laminated are configured. And each part of the bending parts 34 and 36 is stuck by sticking means, such as an adhesive agent, and the state which comprised the bending lamination | stacking parts 42 and 44 is maintained.
[0031]
In this state, the area surrounded by the bent laminated parts 42 and 44 is an accommodating part 46 that can accommodate the laminated bundle 12 (in other words, the laminated bundle 12 can be accommodated in this area, The shape of the bent portions 34 and 36 is determined). Further, in order to prevent the folded laminated portion 42 from overlapping the folded laminated portion 44, the width W1 of the folded portion 34 is shorter than the length L1 of the long side 32L of the bottom plate portion 32, as shown in FIG. Has been.
[0032]
  Here, when the lid plate portion 38 further extended from the bent portion 34 on the long side 32L side is folded inward as indicated by an arrow F in FIGS. 1 and 4A, the lid plate portion 38 accommodates the lid plate portion 38. The lithographic printing plate packaging box 30 can be closed while covering the portion 46. Thereby, as shown in FIG. 3, the planographic printing plate packaging structure 48 of this invention is comprised.The cover plate portion 38 is an element constituting the storage box body according to the present invention, but the laminated bundle 12 of the lithographic printing plate 10 is placed in the storage portion 46 of the storage box body before the cover plate portion 38 is closed. The laminated bundle 12 of the accommodated planographic printing plate 10 is covered with the cover plate portion 38 while being accommodated.
[0033]
In addition, although the front-end | tip of each cover plate part 38 may overlap partially in the state which covered the accommodating part 46, in this embodiment, the front-end | tip of the cover plate part 38 is faced | matched. (The tips are in line contact with each other). Accordingly, it is possible to cover the accommodating portion 46 with a necessary minimum area, and it is possible to prevent an upward swell (overlapped portion) in a state where the accommodating portion 46 is covered.
[0034]
In the state in which the planographic printing plate packaging structure 48 is configured, the cover plate portions 38 or the cover plate portion 38 and the folded laminated portions 42 and 44 are fixed by a fixing means such as an adhesive tape 50 and through a gap. It is shielded from inadvertently entering light from the outside to the inside. Further, the gap generated in the butt portion 52 between the folded laminated portion 42 and the folded laminated portion 44 is also closed by the adhesive tape 54, and the lithographic printing plate packaging box 30 is more reliably shielded from light.
[0035]
When the laminated bundle 12 of the lithographic printing plate 10 is accommodated and packaged in the lithographic printing plate packaging box 30 of the first embodiment having such a configuration, the folded laminated portion is formed outside all four sides of the lithographic printing plate 10. 42 or the folded laminated portion 44 is positioned.
[0036]
In general, lithographic printing plates (photosensitive printing plates and heat-sensitive printing plates) are formed as a single thin plate. Therefore, if there are scratches or deformations in corners, sides, or the inside, they are developed by light and heat. Problems such as blurring of the image or non-uniformity of the ink when printed are likely to occur. By storing and packaging the laminated bundle 12 of the lithographic printing plate 10 in the lithographic printing plate packaging box 30 of the present embodiment, as described above, the folded laminated portion 42 is formed outside all four sides of the lithographic printing plate 10. Alternatively, since the folding laminated portion 44 is positioned, even when an external force is applied during handling, the energy of the external force is absorbed by the deformation and crushing of the folding laminated portions 42 and 44, and the planographic printing plate 10 is not damaged. Deformation is prevented.
[0037]
Further, the bending lamination portions 42 and 44 increase the bending rigidity of the planographic printing plate packaging box 30 so that it is not easily bent. Accordingly, bending of the lithographic printing plate 10 accommodated and packaged in the lithographic printing plate packaging box 30 is also prevented. As described above, the planographic printing plate 10 is maintained at a constant quality, and adverse effects on development and printing are eliminated.
[0038]
Moreover, the folded laminated portions 42 and 44 can be configured by bending the bent portions 34 and 36 extended from the bottom plate portion 32. Further, the cover plate portion 38 also extends from the bent portion 34. As a result, the lithographic printing plate packaging box 30 can be formed of a single piece of corrugated cardboard, so that the number of parts is reduced and the manufacturing cost of the lithographic printing plate packaging box 30 is reduced. Moreover, the operation of assembling the planographic printing plate packaging box 30 from the unfolded state is facilitated.
[0039]
The bent portion 36 extended from the short side 32S side of the bottom plate portion 32 is not necessarily extended with the lid plate portion 38 unlike the bent portion 34. There is no need to form the stacked portion 44. For example, as shown in FIG. 4C, the bent portion 36 may be folded in the same direction to form a spiral bent laminated portion 56.
[0040]
In the planographic printing plate packaging box 30 of the present embodiment, the height of the accommodating portion 46 can be adjusted by adjusting the extension length of the bent portions 34 and 36 from the bottom plate portion 32 and the number of times of bending. In the laminated bundle 12 of the lithographic printing plate 10, the thickness of the laminated bundle 12 may vary depending on the number of the lithographic printing plates 10 or the thickness per lithographic printing plate 10. By matching the height of the portion 46 with the height of the laminated bundle 12, the laminated bundle 12 can be accommodated in the accommodating portion 46 without a gap. For example, in the above-described example, as can be seen from FIG. 4, the height H of the accommodating portion 46 is the height of four cardboards. On the other hand, for example, as shown in FIGS. 5A to 5C, the height of the accommodating portion 46 (the folded laminated portion 42, 44, 56 (height) H may be equivalent to two cardboards. On the contrary, by increasing the extension length of the bent portion 34 and increasing the number of times of folding, the height of the accommodating portion 46 (the height of the folded laminated portions 42, 44, 56) is equal to or more than six cardboards. It is good.
[0041]
  FIG. 6 shows the present invention.Reference exampleA lithographic printing plate packaging box 60 is shown. Hereinafter, the same components and members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0042]
  Reference exampleIn the lithographic printing plate packaging box 60, the bent portions 34 and 36 (see FIG. 2) are not extended from the bottom plate portion 32. Instead, a plurality of sheets formed separately from the bottom plate portion 32 are provided. Laminated plates 62 and 64 are provided.
[0043]
As shown in FIG. 7A, all the laminated plates 62 are formed of the same size by corrugated cardboard, laminated at a position corresponding to the long side 32L of the bottom plate portion 32, and a bonding means such as an adhesive. Is stuck. Similarly, as shown in FIG. 7 (B), the laminated plates 64 are all formed of the same size by corrugated cardboard, and are laminated at positions corresponding to the short sides 32S of the bottom plate portion 32, and adhered with adhesive or the like. The laminated portion 70 is configured by being attached by means. Here, only one laminated plate 64 is provided than the laminated plate 62.
[0044]
  Also,Reference exampleThe lid plate portion 38 is also formed separately from the laminated plate 62, and a pasting plate 66 having the same shape as the laminated plate 62 is extended. As can be seen from FIG. 7A, the pasting plate 66 is stuck on the upper surface of the uppermost laminated plate 62, and the laminated plate 62 and the pasting plate 66 constitute a laminated portion 68. Accordingly, the stacked portion 68 and the stacked portion 70 have the same height, and the inside of the stacked portions 68 and 70 is the accommodating portion 46. In the state in which the laminated bundle 12 of the lithographic printing plate 10 is accommodated in the accommodating portion 46, the cover plate portion 38 is indicated by an arrow F in FIGS. 6 and 7A as in the case of the lithographic printing plate packaging box 30 of the first embodiment. As shown, by folding inward, the container 46 can be covered and the lithographic printing plate packaging box 60 can be closed. The cover plate portions 38 or the cover plate portion 38 and the bent laminated portions 42 and 44 are fixed by a fixing means such as an adhesive tape 50. Furthermore, the gap generated at the butt portion between the laminated portion 68 and the laminated portion 70 is also closed by the adhesive tape.
[0045]
  It was configured like thisReference exampleIn the lithographic printing plate packaging box 60, as in the lithographic printing plate packaging box 30 of the first embodiment, the lithographic printing plate 10 (laminated bundle 12) housed and packaged inside is laminated on all four sides. The part 68 or the laminated part 70 is located. For this reason, when an external force is applied, the energy is absorbed by the deformation and crushing of the stacked portions 68 and 70, and the scratch and deformation of the planographic printing plate 10 are prevented.
[0046]
  Moreover,Reference exampleThe lithographic printing plate packaging box 60 has a higher degree of freedom in adjusting the height H of the accommodating portion 46 than the lithographic printing plate packaging box 30 of the first embodiment. That is, in the lithographic printing plate packaging box 30 of the first embodiment, since it is composed of a single piece of corrugated cardboard from the bottom plate portion 32 to the lid plate portion 38 through the bent laminate portion 42, the folded laminate portion 42 is provided. The number of laminated cardboards constituting the inevitably becomes an even number. In contrast,Reference exampleIn the lithographic printing plate packaging box 60, the laminated portions 68 and 70 are configured by laminating laminated plates 62 and 64 formed separately from the bottom plate portion 32. Therefore, the laminated plates 62 and 64 are laminated. There is no limit to the number of sheets. For this reason, for example, an odd number of laminated plates 64 can be laminated to form the laminated portion 70.
[0047]
  FIG. 8 shows the present invention.Second embodimentThe lithographic printing plate packaging box 80 is shown partially enlarged. Hereinafter, the same components, members, and the like as those of the planographic printing plate packaging box 30 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
[0048]
  Second embodimentThe overall configuration of the lithographic printing plate packaging box 80 is the same as that of the lithographic printing plate packaging box 30 of the first embodiment, but the butt portion 52 between the folded laminated portion 42 and the folded laminated portion 44 is the same. The structure is different from that of the first embodiment, that is, the bent laminated portion 42 is provided with a convex portion 82 that faces the bent laminated portion 44, and the bent laminated portion 44 has a concave portion 84 corresponding to the convex portion 82. Is formed. The non-linear portion of the present invention is constituted by the convex portion 82 and the concave portion 84, and the butt portion 52 is bent. Therefore, the linear path from the outside to the inside of the lithographic printing plate packaging box 80 Is blocked. Since light has a straightness, the linear path of the abutting portion 52 is blocked in this way, so that direct light intrusion from the outside to the inside of the lithographic printing plate packaging box 80 is prevented. ing.
[0049]
  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, the image is blurred when developed, and the ink is uneven when printed. It is necessary to shield from light. Further, it is preferable that the heat-sensitive printing plate be appropriately shielded from light 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. For this reason, in the first embodiment, as shown in FIG. 3, the adhesive tape 54 is attached to the butt portion 52, or the laminated bundle 12 is provided with interior paper as necessary, and the planographic printing plate 10 is shielded from light. I was trying toSecond embodimentBy using the lithographic printing plate packaging box 80, the lithographic printing plate 10 can be more reliably shielded from light. Depending on the type of the lithographic printing plate 10 and the like, even if the interior paper is omitted, the lithographic printing plate 10 can be reliably shielded from light, resulting in low cost.
[0050]
In addition, the accommodated planographic printing plate 10 can be shielded by simply changing the shape of the folded laminated portions 42 and 44, and a special member for shielding the planographic printing plate 10 is not required. Therefore, the lithographic printing plate packaging box 80 can be manufactured at a low cost without increasing the number of parts constituting the lithographic printing plate packaging box 80.
[0051]
The shape of the non-linear portion of the present invention is not particularly limited as long as the straight path from the outside to the inside of the lithographic printing plate packaging box at the butting portion 52 can be blocked. For example, the bent laminated portion 44 may be provided with a convex portion, and the bent laminated portion 42 may be provided with a concave portion. The number of convex portions and concave portions is not particularly limited.
[0052]
  Also,Reference exampleIn the lithographic printing plate packaging box 60, the non-linear portion of the present invention can be formed by providing the laminated portion 68 with a convex portion and the laminated portion 66 with a concave portion, thereby improving the light shielding property.
[0053]
In the bending laminated portions 42 and 44 and the laminated portions 68 and 70 of the above-described embodiments, the direction in which the cardboards are laminated is not limited to the above-described direction. That is, in the above description, the configuration in which the stacking direction is the thickness direction of the bottom plate portion 32 (the height direction of the lithographic printing plate packaging box 30) has been described. For example, FIGS. 9 (A) and 9 (B) As shown, the stacking direction may be the surface direction of the bottom plate portion 32. When the layers are laminated in the plane direction as described above, the interval between the fold lines 40 substantially matches the height H of the accommodating portion 46, so that the height of the accommodating portion 46 can be freely set.
[0054]
  Further, the overall configuration of the lithographic printing plate packaging boxes 30, 60, 80 is not limited to that described above.Yes.
[0055]
The configuration of the lithographic printing plate 10 accommodated and packaged in the lithographic printing plate packaging boxes 30, 60, 80 is not limited to the above. That is, the laminated bundle 12 may be constituted by only the lithographic printing plate 10 without using the interleaving paper 14, or only one lithographic printing plate 10 is contained and packaged in the lithographic printing plate packaging box 30. It may be like this.
[0056]
The material constituting the lithographic printing plate packaging boxes 30, 60, 80 is not limited to cardboard, and is not particularly limited. However, if the whole is composed of the same material, the lithographic printing plate packaging boxes 30, 60, 80 are discarded. Since it is not necessary to separate the parts made of different materials at the time or during recycling, it becomes easy to dispose and recycle. As a specific material, as described above, it is possible to manufacture the lithographic printing plate packaging boxes 30, 60, and 80 at a low cost by making it made of corrugated cardboard, and easily obtain a predetermined strength and rigidity. It becomes possible. Other than corrugated cardboard, for example, cardboard, kraft paper, paper honeycomb structure material, or the like can be used.
[0057]
When using corrugated cardboard, it is preferable to satisfy the following conditions from the viewpoint of maintaining constant strength.
[0058]
First, when the corrugated cardboard steps (flutes) are listed in a preferable order, they are A flute, C flute, B flute and E flute. The layer structure of the corrugated cardboard is preferably a double-sided (AAA etc.) cardboard, a double-sided (AA etc.) cardboard, and a double sided (A etc.) cardboard. Further, when the grades of the front liner and the back liner of the corrugated cardboard are listed in a preferable order, they are AA class, A class, B class, and C class. The basis weight of the front liner and the back liner is 160 (g / m² ) Or more 440 (g / m)² ) The types of corrugated shin are listed in order of preference: reinforced medium shin, Class A, Class B, and Class C. The weight of medium shin is 100 (g / m).² ) Or more 280 (g / m)² )
[0059]
When a paper honeycomb structure material is used instead of corrugated cardboard, it is preferable that the front liner, the back liner, and the middle spot are the same as those of the corrugated cardboard described above.
[0060]
Furthermore, when using cardboard instead of cardboard, the basis weight is 200 (g / m² ) Or more 2000 (g / m² It is preferable that the basis weight of the front liner, the back liner, and the middle shin of the corrugated cardboard and the honeycomb structure material and the basis weight of the cardboard increase as the numerical value increases.
[0061]
As the interleaf paper 14, the specific configuration is not limited as long as the coating film of the lithographic printing plate 10 can be reliably protected. For example, paper using 100% wood pulp or synthetic pulp without using 100% wood pulp. And paper having a low-density polyethylene layer on the surface of these papers. In particular, in the paper which does not use synthetic pulp, since the material cost becomes low, the interleaf paper 14 can be manufactured at low cost. More specifically, basis weight 20-60 g / m made from bleached kraft pulp.² , Density 0.7-0.85 g / cm^Three However, it is of course not limited to this, but includes 4 to 6% moisture, Beck smoothness of 10 to 800 seconds, and PH of 4 to 6.
[0062]
The specific configuration of the protective cardboard 22 is not limited as long as the planographic printing plate can be reliably protected. For example, the basis weight of paper made from waste paper is 200 to 1500 g / m.² , Density 0.7-0.85 g / cm^Three , 4 to 8% moisture, Beck smoothness 3 to 20 seconds, PH 4 to 6 protective cardboard.
[0063]
When the laminated bundle 12 is used using interior paper, for example, a metal film such as aluminum foil having a predetermined thickness attached to kraft paper with a resin material such as low-density polyethylene, or this aluminum A foil with a low-density polyethylene layer with a thickness of 10 to 70 μm, and a low-density polyethylene layer with a black polyethylene film with a predetermined thickness to improve light shielding and moisture resistance. Can be used as interior paper. Moreover, if a certain light-shielding property and moisture-proof property can be exhibited only with kraft paper, the low density polyethylene layer and the black polyethylene film do not necessarily have to be stuck. In addition, for example, the basis weight is 50 to 100 g / m.²Kraft paper has a moisture barrier of about 10g / m²It is applied and the light shielding layer is about 10g / m²It is also possible to use a coated paper that can be recovered and a black colored resin film (for example, a polyethylene film having a thickness of 55 μm).
[0064]
【The invention's effect】
  In the present invention, a lithographic printing plate packaging box for containing and packaging a lithographic printing plate therein,A lithographic plate corresponding to each side of the lithographic printing plate placed on the bottom plate portion, which is laminated by folding a bottom plate portion having a size larger than that of the lithographic printing plate and a bent portion extending from each side of the bottom plate portion. The folded laminated part that absorbs the energy of external force by being arranged so as to surround the printing plate, and is further extended from the two folded laminated parts facing each other and accommodated on the bottom plate part and inside the folded laminated part A cover plate covering the lithographic printing plate,Therefore, when an external force is applied from the outside, the energy of the external force can be absorbed corresponding to all sides of the packaged lithographic printing plate, and the packaged lithographic printing plate can be reliably protected.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a laminated bundle of lithographic printing plates is accommodated and packaged in a lithographic printing plate packaging box according to a first embodiment of the present invention.
FIG. 2 is a development view showing a packaging box body constituting the lithographic printing plate packaging box according to the first embodiment of the present invention.
FIG. 3 is a perspective view showing a state in which a laminated bundle of lithographic printing plates is received and packaged by the lithographic printing plate packaging box according to the first embodiment of the present invention.
4 shows a lithographic printing plate packaging box according to the first embodiment of the present invention, in which (A) is a cross-sectional view taken along line IVA-IVA in FIG. 1, (B) is a cross-sectional view taken along line IVB-IVB in FIG. (C) is sectional drawing which shows another example of a bending lamination | stacking part by the same cross section as (B).
FIGS. 5A to 5C show a case where the height of the accommodating portion in the lithographic printing plate packaging box according to the first embodiment of the present invention is lower than that in FIG. It is sectional drawing shown corresponding to-(C), respectively.
FIG. 6 of the present inventionReference exampleIt is a perspective view which shows the state which accommodates and packs the laminated bundle of a lithographic printing plate in the packaging box for lithographic printing plates.
[Fig. 7] of the present invention.Reference exampleFIG. 7A is a sectional view taken along line VIIA-VIIA in FIG. 6, and FIG. 7B is a sectional view taken along line VIIB-VIIB in FIG. 6.
[Fig. 8] of the present inventionSecond embodimentIt is a perspective view which expands partially and shows the packaging box for lithographic printing plates.
9 shows another example of the laminated portion of the lithographic printing plate packaging box of the present invention, (A) is a cross-sectional view at the same position as FIG. 4 (A), (B) is FIG. 4 (B) It is sectional drawing in the same position.
FIG. 10 is a perspective view showing a conventional packaging box.
[Explanation of symbols]
        10 Planographic printing plate
        12 Load bundle
        30 Packaging box for planographic printing plates
        32 Bottom plate (packaging box body)
        38 Cover plate (packaging box body)
        34 Bending part (extension part, protective plate)
        36 Bent part (extension part, protective plate)
        42 Folding layer (protective member)
        44 Folding laminated part (protective member)
        48 Lithographic printing plate packaging structure
        52 Butting part
        60 Packaging box for lithographic printing plates
        62 Laminate (Protective plate)
        64 Laminated board (protection board)
        68 Laminating part (protective member)
        70 Laminating part (protective member)
        80 Packing box for lithographic printing plates
        82 Convex (non-linear part)
        84 Concave part (non-linear part)

Claims (3)

A lithographic printing plate packaging box for containing and packaging a lithographic printing plate inside,
A bottom plate that is larger than the planographic printing plate,
A lithographic plate laminated on the bottom plate portion by folding and folding the bent portions that are integrated with the bottom plate portion from each side of the bottom plate portion and having a certain thickness from the same material as the bottom plate portion. A folded laminated portion that absorbs the energy of external force by being arranged so as to surround the planographic printing plate corresponding to each side of the printing plate;
A cover plate portion that further extends from the two folded laminated portions facing each other and covers the planographic printing plate accommodated on the bottom plate portion and inside the folded laminated portion;
A packaging box for a lithographic printing plate, comprising: A lithographic printing plate packaging box according to claim 1,
A non-linear portion that is provided at a butt portion between the folded laminated portions and blocks a linear path from the outside to the inside of the lithographic printing plate packaging box ;
A packaging box for a lithographic printing plate, comprising: A lithographic printing plate;
The lithographic printing plate packaging box according to claim 1 or 2 , wherein the lithographic printing plate is accommodated and packaged therein;
A lithographic printing plate packaging structure characterized by comprising:

Images