JP2001301817A - Structure and method for packing lithographic printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the protectiveness to a plurality of lithographic printing plates constituting a plate bundle, and to simplify the packing work and the unpacking work of the loaded bundle. SOLUTION: The bundle 12 packaged by an inner packaging paper 46 is loaded on a loading base 22 in a substantially vertically loading condition. A pair of corner pad members 48 are fitted to both corners on a top surface side via the inner packaging paper 46 in an abutting manner, and the pair of corner pad members 48 are tightened by a tightening belt 38. The pair of corner pad members 48 are pressed against both corners of the top surface side of the bundle loaded on the loading base 22 via a rubber sheet 54 and a urethane sponge 56, and a bottom surface of the bundle 12 is pressed against a loading and supporting surface 30 of the loading base 22 by the pressure from the pair of corner pad members 48, and thus, the bundle 12 is fixed on the loading base 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing structure and a packing method for packing a plurality of planographic printing plates so that they can be transported collectively.

[0002]

2. Description of the Related Art Recent plate making methods (including electrophotographic plate making methods)
Lithographic printing plates (photosensitive printing plates, heat-sensitive printing plates, etc.), which are widely used to facilitate the automation of the plate making process
Is formed by coating a photosensitive layer or a heat-sensitive layer on a single thin support (such as an aluminum plate).

[0003] When handling this lithographic printing plate in order to reduce the number of times of handling and to carry and store at low cost,
A large number of planographic printing plates may be stacked in the thickness direction to form a bundle of planographic printing plates (hereinafter simply referred to as a “plate bundle”), and the plate bundle may be loaded and packaged on a loading member such as a pallet.

FIG. 5 shows an example of such a lithographic printing plate packaging structure (see Japanese Patent Application Laid-Open No. 3-73946). In this packing structure 110, a required number of printing plates 116 are provided on a back plate 114 erected inclining with respect to a bottom plate 112.
After holding the plate bundle 118, another contact plate 120 is applied to the surface side of the plate bundle 118, and then the back plate 114 and the contact plate 1
20 are fastened by bolts 122 to fix the plate bundle 118. In addition, since both the photosensitive printing plate and the heat-sensitive printing plate are in the form of one thin plate,
If the corners and sides of the printing plate are scratched or deformed, or if the image forming surface of the printing plate is distorted due to a large pressing force, the image may be blurred when developed by light or heat in such portions. However, problems such as non-uniformity of the ink when printed are likely to occur. Therefore, as can be seen from FIG.
0 is larger in size than the printing plate 116, and protects the printing plate 116 so that no corners or sides of the printing plate 116 are damaged or deformed.

[0005]

However, the plate 120 has a larger size than the printing plate 116, and the plate bundle 118
The entire surface of the plate bundle 118 comes into contact with the front surface of the plate bundle 118, so that the weight increases, and the plate bundle 118 is fixed or released, transported, or the plate 120
It was inconvenient to handle when recovering.

In view of the above, an object of the present invention is to provide a lithographic printing plate which has good protection to a plurality of lithographic printing plates constituting a plate bundle and which can easily pack and unpack a stack of bundles. It is to provide a packing structure and a packing method.

[0007]

A lithographic printing plate packing structure according to the present invention includes a plate bundle formed by stacking a plurality of lithographic printing plates in a thickness direction, and one end side of the plate bundle. A loading member for bringing the loading support portion into contact with the bottom portion located at
A pair of square contact members mounted on the plate bundle so as to abut against both corners along the thickness direction on the other end surface side of the plate bundle stacked on the stacking member, and the pair of square contact members; The pair of corners are pressed against the corners of the plate bundle stacked on the stacking member, and the bottom surface of the plate bundle is pressed against the stacking support portion by the pressure from the pair of square contact members. Fixing means for restricting displacement of the contact member with respect to the plate bundle and the stacking member.

According to the planographic printing plate packaging structure having the above-described structure, the pair of square contact members whose displacement relative to the plate bundle and the stacking member are restricted by the fixing means are provided at both corners of the plate bundle stacked on the stacking member. Each of the press-contacts, and the bottom surface of the plate bundle presses against the loading support portion by the pressing force from the pair of square contact members, so that the movement of the plate bundle along the surface direction is performed by the loading support portion and the pair of square contact members. The plate bundle is restrained and the movement along the thickness direction of the plate bundle is also restricted by frictional resistance and the like generated between the loading support portion and the pair of square contact members, so that the plate bundle can be firmly fixed to the loading member. In addition, relative movement between a plurality of planographic printing plates forming a plate bundle can be reliably prevented.

In the lithographic printing plate packing structure having the above-described structure, since a large pressing force along the thickness direction does not act on the lithographic printing plates constituting the plate bundle, a large pressing force is directly applied to the image forming surface of the lithographic printing plate. Can prevent the occurrence of distortion and deformation. Even when the plate bundle is composed of a large-size lithographic printing plate, it is attached to the plate bundle at the time of packing,
Since the size of the square contact member that is removed from the plate bundle during unpacking can be suppressed, the load on packing and unpacking work on the plate bundle is reduced, and the amount of material required to pack the plate bundle is reduced. it can.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A planographic printing plate packaging structure according to an embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a lithographic printing plate packaging structure (hereinafter simply referred to as a “packing structure”) according to an embodiment of the present invention, and FIG. 3 shows a packaging structure in the packaging structure according to the embodiment. The previous state is shown.

The lithographic printing plate 10 is formed by coating a photosensitive layer or a heat-sensitive layer on an aluminum support formed in the shape of a rectangular thin plate. The lithographic printing plate 10 uses digital image processing. P applicable to the automatic plate making system
An S version and a CTP version are included. Lithographic printing plate 10
Is not particularly limited in shape as long as it is substantially rectangular. For example, on a rectangular aluminum plate having a thickness of 0.3 mm, a long side of 1310 mm, and a short side of 1050 mm,
One coated with a photosensitive layer or a heat-sensitive layer is a packaging target of the present embodiment.

As shown in FIG. 3, the plate bundle 12 is composed of a lithographic printing plate 10 in which an interleaf 14 is brought into close contact with an image forming surface by electrostatic force.
Are stacked in the thickness direction (the direction of the arrow T) of a predetermined number of sheets, and protective thick papers 16 are arranged on both front and rear surfaces in the thickness direction of the planographic printing plate 10 and the interleaf paper 14 on both sides thereof. Have been. Here, as the interleaf paper 14, a basis weight of 20 to 45 g / m ² , a density of 0.7 to 0.85 g / cm ³ , a water content of 4 to 6%, a Beck smoothness of 10 to 800 seconds, which is made from bleached kraft pulp, A kraft paper of PH 4 to 6 is used, and the kraft paper is adhered to the image forming surface of the lithographic printing plate 10 by electrostatic adhesion. As the protective cardboard 22, a basis weight of 200 to 1500 g / m ² and a density of 0.
7 to 0.85 g / cm ³ , water 4 to 8%, Beck smoothness 3 to 20 seconds, PH 4 to 6 are used.

A lithographic printing plate 10 constituting one plate bundle 12
The number of sheets is not particularly limited, but may be, for example, 10 to 100 sheets from the viewpoint of efficient transportation and storage. Also, as described above, 10 to 100 lithographic printing plates 1 are used.
0, the lithographic printing plate 1
0 and the protective cardboard 16 are fixed with an adhesive tape 18 as necessary so that they do not shift. However, adhesive tape 1
It is preferable not to use the adhesive tape 18 in consideration of the transfer of the adhesive from the lithographic printing plate 8 to the lithographic printing plate 10 and the workability when removing the lithographic printing plate 10. In addition, the plate bundle 12 can be configured by more lithographic printing plates 10 so that the plate bundle 12 can be transported and stored more efficiently (with a smaller number of loads). For example, if the number of lithographic printing plates 10 is 200 to
Approximately 2,000 sheets may be used, and the protective cardboard 22 may be inserted and partitioned every 20 to 100 sheets of the lithographic printing plate 10. Further, the protective cardboard 16 may be arranged only above and below the stacked planographic printing plates 10.

FIG. 1 shows a packing structure 20 according to this embodiment.
A loading table 22 on which the plate bundle 12 is loaded is provided as shown in FIG. At the lower end of the loading table 22, a substantially rectangular plate-shaped pallet 24 is disposed. Insertion holes 26 are formed at the short side and the long side of the outer surface of the pallet 24 so as to penetrate in the longitudinal direction (arrow L direction) and the transverse direction (arrow S direction), respectively. These insertion holes 2
Reference numeral 6 denotes a fork insertion portion when the packing structure 20 is transported by a forklift or a hand lift, respectively.

As shown in FIG. 1, an inclined plate 28 is fixed on the pallet 24 of the loading table 22. The inclined plate 28 is formed in a wedge shape such that the wall thickness decreases from one end to the other end along the longitudinal direction of the pallet portion 24. Loading support surface 30 which is a flat surface inclined downward toward the side.
Is provided. A flat back plate 32 is provided on the loading table 22 so as to be in contact with the other end of the inclined plate 28 on the pallet 24. The back plate 32 is fixed to the pallet 24 so that the plane on the side of the inclined plate 28 is orthogonal to the loading support surface 30, and 5 to 30 in the vertical direction.
° (preferably 10 to 15 °). As a result, the flat surface of the back plate 32 on the side of the inclined plate 28 serves as a contact support surface 34 that receives a part of the load from the plate bundle 12 loaded on the loading table 22.

As shown in FIG. 3, a slit-like insertion hole 36 penetrating in the short direction of the pallet portion 24 is opened at the side end surface of the inclined plate 28. As shown in FIG. 1, the insertion belt 36 has a fastening belt 38 formed in an elongated belt shape.
Is inserted through the middle part in the longitudinal direction. As a result, the fastening belt 38 is connected to the inclined plate 28 and the insertion holes 36
Both ends of the tightening belt 38 extend from both open ends of the belt. A metal belt buckle 40 is fixed to one end of the fastening belt 38. Here, the fastening belt 38
Various types can be used as long as they have sufficient strength and durability. Specifically, for example, a high-strength belt called a so-called lashing belt is used.

As shown in FIG. 3, a slit-shaped insertion hole 42 penetrating in the short direction of the pallet 24 is also formed on the side end surface of the back plate 32. In this insertion hole 42,
As shown in FIG. 1, an elongated belt-shaped fall prevention belt 44 is inserted. Thereby, the fall prevention belt 4
Reference numeral 4 is connected to the back plate 32, and fastening belts 38 extend from both open ends of the insertion holes 36, respectively. After the fall prevention belt 44 is inserted into the insertion hole 42, both ends are joined to each other to form a loop.
Similarly to 8, the belt length of the loop portion may be adjustable using a belt buckle. The fall prevention belt 44 may have the same structure and material as the tightening belt 38.
Since the load is small, a belt thinner than the fastening belt 38 is used. In addition, a storage section (a part for storing a part of the overturn prevention belt 44 so as to prevent the overturn prevention belt 44 from hanging down when the overturn prevention belt 44 is not used is provided on the back side of the contact support surface 34 of the back plate 32. (Not shown).

As shown in FIG. 3, one or more bundles of plate bundles 12 are stacked on the loading table 22 in the thickness direction, and wrapped with one piece of interior paper 46 as shown in FIG. What was done is loaded. Further, the end of the interior paper 46 is attached to the inclined plate 28 and the back plate 3 with an adhesive tape or the like as necessary.
2 is fixed.

Here, the interior paper 46 is formed by adhering a metal thin film of a predetermined thickness to one rectangular kraft paper having a predetermined size, and furthermore, a predetermined thickness of the metal thin film is further applied on the metal thin film in some cases. It is configured by laminating a resin layer having a thickness. In general, a photosensitive printing plate has high photosensitivity, and even if exposed to light in a slight visible light wavelength band, a change occurs in the photosensitive layer. Also, the heat-sensitive printing plate is preferably subjected to appropriate light shielding because the heat-sensitive layer may be degraded by the heat energy of the applied light or the sensitivity may change due to the progress of the reaction. Further, when a rapid change in humidity or temperature is applied, any of the printing plates is deteriorated due to condensation on the photosensitive layer or the heat-sensitive layer,
Therefore, it is necessary to provide moisture proofing because of the disadvantages such as being adhered. Since the interior paper 46 has a certain light-shielding property and moisture-proof property by being configured as described above, the photosensitive layer or the heat-sensitive layer of the lithographic printing plate 10 is prevented from being deteriorated, and the lithographic printing plate 10 is maintained at a certain quality. Is done.

In the present embodiment, as an example of the interior paper 46,
Kraft paper having a size large enough to integrally package the plurality of plate bundles 12 stacked on the stacking support surface 30 includes 6 to
A 7 μm aluminum foil adhered with a 10 to 20 μm low-density polyethylene layer is used. A low-density polyethylene layer of 10 to 70 μm is adhered to this aluminum foil, or a black polyethylene film of about 70 μm is further adhered to this low-density polyethylene layer to obtain a material having improved light-shielding properties and moisture-proof properties. May be used. Further, if the interior paper 46 can exhibit a certain light-shielding property and moisture-proof property, it is not always necessary to attach the low-density polyethylene layer and the black polyethylene film.

As shown in FIGS. 1 and 2, the plate bundle 12 is loaded on the loading table 22 in a substantially vertical state. When the plate bundle 12 is loaded on the loading table 22, the load due to the own weight of the plate bundle 12 acts on the loading support surface 30 and the contact support surface 34 of the loading table 22, respectively. Since the bundle 12 is substantially stacked vertically, the load acting on the loading support surface 30 of the load due to the weight of the plate bundle 12 is larger than the load acting on the contact support surface 34. That is, the plate bundle 1 on the loading table 22
Reference numeral 2 indicates that the bottom surface of the outer peripheral end face along the surface direction is pressed against the loading support surface 30 via the interior paper 46, and the back surface along the thickness direction is pressed against the contact support surface.
Thereby, the plate bundle 12 is positioned in the plane direction and the thickness direction, respectively.

Further, when stacking the plate bundle 12 on the stacking table 22, the portion extending from the insertion hole 36 is not inclined by the belt buckle 40 while the fastening belt 38 is connected to the inclined plate 2.
8, or on the back side of the back plate 32, and the overturn prevention belt 44 extends from the insertion hole 42 at the contact support surface 3.
4 is turned to the back surface side of the back plate 32 on the opposite side.

As shown in FIG. 1, the packing structure 20 of the present embodiment is connected to both corners on the top surface side of the outer peripheral end face of the plate bundle 12 loaded on the loading table 22 via the interior paper 46. A pair of corner contact members 48 are provided so as to be in contact with each other. The square contact member 48 is formed to be elongated in the thickness direction of the plate bundle 12 using a wooden board as a material.
A flat top plate 50 is provided on the top side of the corner contact member 48, and a flat side plate 52 bent at a substantially right angle downward at one end along the width direction of the top plate 50 is provided. Is provided. Here, the width of the top plate 50 is the side plate 52
Is longer than or approximately equal to the width of. In addition, the length of the squaring member 48 needs to be longer than the thickness of the plate bundle 12 including the interior paper 46. However, an excessively large dimensional difference is not preferable because the tip of the squaring member 48 protrudes.
It is sufficient if the square contact member 48 is longer than the plate bundle 12 by about several tens of mm.

As shown in FIG. 1, a rubber sheet 54 is provided on the inner surface of the side plate 52 as a cushioning material.
Is pasted. Thereby, the corner contact member 48
The side plate portion 52 is in contact with the side surface portion of the outer peripheral end surface of the plate bundle 12 via the rubber sheet 54. In addition, the corner contact member 48
The plate-shaped urethane sponge 56 also serves as a cushioning material between the top plate 50 and the top surface of the plate bundle 12 when mounted on the plate bundle 12.
Is inserted. Thus, the corner contact member 48 causes the top plate 50 to contact the top surface of the plate bundle 12 via the urethane sponge 56.

The rubber sheet 54 has a thickness of 1 mm to
It is about 5 mm and has a rubber hardness (JISK 630).
Those having 1) of about 10 to 98 are suitable. The urethane sponge 56 is thicker than the rubber sheet 54,
The thickness is about 5 mm to several tens mm. The dimensions of the rubber sheet 54 and the urethane sponge 56 are larger than those of the side plate portion 52 and the top plate portion 50 so as to extend from the square contact member 48 to the outside by about several mm to 10 mm, respectively. Accordingly, even when the square contact member 48 is tightened by the fastening belt 38 with a strong force, the square contact member 48
Is prevented from directly contacting the plate bundle 12. However, if the rubber sheet 54 and the urethane sponge 56 have a sufficient thickness, each of the side plate portions 52
There is no problem even if the size is smaller than the top plate portion 50.

As a cushioning material between the square contact member 48 and the plate bundle 12, a rubber sheet 54 or a urethane sponge 5 is used.
In addition to 6, cardboard, cardboard, honeycomb structured paper and the like can be used. However, if the material of the squaring member 48 is sufficiently flexible, deformation of the lithographic printing plate 10 and the like can be sufficiently prevented only by interposing the interior paper 46 between the lithographic printing plate 10 and the cushioning material is omitted. You may. In the present embodiment, two types of the cushioning material, the rubber sheet 54 and the urethane sponge 56, are used. However, the same type of cushioning material may be arranged inside the side plate portion 52 and the top plate portion 50.

When a pair of square contact members 48 are mounted on the plate bundle 12 loaded on the loading table 22, the fastening belt 38
Both end portions are respectively wound from the side surface portion to the top surface portion on the outer peripheral end surface of the plate bundle 12, and the portions which are connected to each other by the belt buckle 40 and are wound around the plate bundle 12 are formed into a loop shape. The belt buckle 40 is a fastening belt 38
Has a function of adjusting a tightening length which is a length of a loop portion of the tightening belt 3 extending from the belt buckle 40.
By pulling one end of 8, the tightening length of the tightening belt 38 is shortened. The belt buckle 40 does not increase the tightening length of the tightening belt 38 unless the lock lever 41 is raised to release the locked state. The tightening belt 38 is previously formed into a loop shape by a belt buckle 40 and placed on the back surface side of the back plate 32. After the tightening belt 38 is mounted on the plate bundle 12, the tightening belt 38 is Is turned to the contact support surface 34 side of the back plate 32 to adjust the length by the belt buckle 40,
The plate bundle 12 on which the square contact member 38 is mounted is fastened to the fastening belt 38.
May be tightened.

The tightening length of the tightening belt 38 is adjusted by the belt buckle 40 so that a sufficiently large tension is generated with respect to the weight of the plate bundle 12. As a result, the belt buckle 40 comes into pressure contact with the outer surfaces of the pair of squaring members 48 as shown in FIG. 1, and the fastening belt 38 moves between the pair of squaring members 48 and with the pair of squaring members 48. Inclined plate 28
And are separated from the outer peripheral end surface of the plate bundle 12.

The tightening belt 38 is arranged so as to be pressed against the vicinity of the center of the square contact member 48 in the longitudinal direction. Accordingly, the corner contact member 48 may be slightly deformed such that the central portion in the longitudinal direction protrudes toward the plate bundle 12, but even if such a bent deformation occurs, the corner contact member 48 is flexible. Since it is pressed against the plate bundle 12 via the rubber sheet 54 and the urethane sponge 56 having properties, local load concentration from the square contact member 48 to the plate bundle 12 can be reduced.

The length of the portion of the fastening belt 38 extending from the inclined plate 28 is adjusted in advance so that the belt buckle 40 is held on the top plate 50 of one of the corner contact members 48. This reliably prevents the metal belt buckle 40 from directly colliding with the plate bundle 12. The width of the top plate portion 50 of the square contact member 48 is
20 to 3 from the length of the tightening belt 38 along the longitudinal direction.
The length is about 0 mm.

The overturn prevention belt 44 is turned from the back side of the back plate 32 to the contact support surface 34 side, and as shown in FIG. 1, a pair of side portions and a thickness direction along the surface direction of the plate bundle 12. Loosely wrapped around the outside of the front along. Thus, even if the loading support surface 30 is inclined in the opposite direction to the back plate 32 for some reason while the loading table 22 is being conveyed by a vehicle, a forklift, or the like, or a large impact acts on the loading table 22, 12 is prevented from slipping off the loading support surface 30.

Next, the operation of the packing structure 20 according to this embodiment will be described.

In the packing structure 20 according to the present embodiment, if the tightening length of the tightening belt 38 is adjusted by the belt buckle 40 so that the tension of the tightening belt 38 becomes sufficiently large with respect to the weight of the plate bundle 12, A pair of square contact members 48 fastened by a fastening belt 38 connected to the loading table 22 via the inclined plate 28 are used to hold the plate bundle 12 loaded on the loading table 22 via the rubber sheet 54 and the urethane sponge 56. Are pressed into contact with both corners on the top surface side, and the bottom surface of the plate bundle 12 is pressed against the stacking support surface 30 of the stacking table 22 by the pressing force from the pair of square contact members 48, thereby forming the plate bundle 1.
2 is restricted by the stacking support surface 30 and the pair of square contact members 48, and the frictional resistance generated between the plate bundle 12 and the rubber sheet 54 and the urethane sponge 56; The movement along the thickness direction of the plate bundle 12 is also restrained by the deformation resistance of the sheet 54 and the urethane sponge 56, so that the plate bundle 12 is placed on the loading support surface 30.
And can be firmly fixed on the loading table 22 so as to be in contact with the contact support surface 34, and the relative movement between the plurality of planographic printing plates 10 constituting the plate bundle 12 can be reliably prevented. .

Further, in the packing structure 20, compared to the conventional packing structure as shown in FIG. 5, a large pressing force in the thickness direction does not act on the lithographic printing plate 10 constituting the plate bundle 12. Therefore, it is possible to prevent a large pressing force from directly acting on the image forming surface of the lithographic printing plate 10, thereby preventing distortion and deformation and a chemical change of the photosensitive layer or the heat-sensitive layer caused by the deformation and deformation.

Further, in the packing structure 20, even when the plate bundle 12 is composed of a large-sized planographic printing plate 10, the size of the planographic printing plate 10 is reduced as in the conventional plate (see FIG. 5). Accordingly, it is not necessary to increase the size of the square contact member 48, and it is possible to suppress an increase in the size of the square contact member 48 attached to the plate bundle 12 at the time of packing and to be removed from the plate bundle 12 at the time of unpacking, and to suppress an increase in weight associated therewith. The load at the time of packing and unpacking work on the plate bundle 12 is reduced, and the amount of materials required for packing the plate bundle 12 can be reduced. Further, in the packing structure 20, the tipping prevention belt 44 is rotated to the rear side of the back plate 32 without removing the pair of square contact members 48 from the plate bundle 12, and the fastening length of the fastening belt 38 is slightly reduced by the belt buckle 40. The required number of lithographic printing plates 10 can be taken out of the loading table 22 by simply extending them, and the lithographic printing plates 10 can be re-fixed only by shortening the fastening length of the fastening belt 38. The operation of taking out the lithographic printing plate 10 from the plate bundle 12 loaded on the slab is also simplified.

In the packing structure 20 according to this embodiment, the square contact member 48 is tightened by one tightening belt 38. However, a plurality of tightening belts 38 are connected to the inclined plate 28, and a plurality of tightening belts are connected. Square contact member 48 by the tightening belt 38
May be fastened by a plurality of fastening belts 38 respectively. By dispersing the load on the square contact member 48 by the plurality of tightening belts 38 in this manner, the bending deformation of the square contact member 48 is suppressed, and the pressing force acting on the plate bundle 12 from the square contact member 48 is reduced. It can be uniform along the direction. As a result, for example, even when the urethane sponge 56 or the rubber sheet 54 as a cushioning material is thinned or omitted, it is possible to prevent a high pressure contact force from acting on some of the lithographic printing plates 10 to cause distortion, deformation, and the like. . Further, the number of the overturn prevention belts 44 need not be one, and a plurality of overturn prevention belts 44 may
And a belt buckle is provided in the middle of the fall prevention belt 44 so that the fall prevention belt 4
4, the tightening length and the slack length may be adjusted so that the plate bundle 12 is tightened.

The material of the corner contact member 48 is not limited to wood, but may be a metal such as resin, iron, aluminum or the like. Further, in the present embodiment, the top plate portion 50 and the side plate portion 52 of the square contact member 48 are provided integrally, but the top plate portion 5 of the square contact member 48 is provided.
Alternatively, the top plate 50 and the side plate 52 may be applied to the top surface and the side surface of the plate bundle 12, respectively, and these may be tightened by the tightening belt 38.

In the packing structure 20 according to the present embodiment, the planographic printing plates 10 constituting the plate bundle 12 are stacked on the loading table 22 in a vertically stacked state, but the planographic printing plates 10 are stacked in a flat stacked state. Loading on a loading table is also possible. Specifically, the plate bundle 12 is stacked on the bottom plate portion of the loading table so that the lithographic printing plate 10 is substantially horizontal, and the plate bundle 12 is placed on the side plate portion of the loading table that is erected at one end of the bottom plate portion. One end surface portion along the surface direction of the plate bundle 12 is brought into contact, and a pair of corner contact members are respectively brought into contact with both corner portions on the other end surface side along the surface direction of the plate bundle 12, and the pair of corner contact members are Tighten by the fastening belt connected to the side plate. When the lithographic printing plates 10 are in the stacked state as described above, the number of the lithographic printing plates 10 constituting the plate bundle 12 is large, and when the thickness of the plate bundle 12 is large, the storage space for the plate bundle 12 can be efficiently used. You can use it.

FIG. 4 shows an example of a structure in which a reinforcing member is interposed between the squaring member and the fastening belt in the packing structure according to the embodiment of the present invention. When it is necessary to tighten the square contact member 48 with a strong force by the fastening belt 38, or when the rigidity of the square contact member 48 cannot be sufficiently increased with respect to the tightening force of the fastening belt 38, the square contact member 48 Due to the bending deformation or local deformation, a strong pressing force acts on a part of the plurality of lithographic printing plates 10 constituting the plate bundle 12, which may cause distortion, deformation, and other problems.

In order to prevent the above-mentioned deformation of the corner contact member 48, the packing structure 20 shown in FIG. A reinforcing member 60 sufficiently larger than the rigidity of the contact member 48
Is sandwiched. The reinforcing member 60 is provided integrally with a top plate portion 62 and a side plate portion 64 corresponding to the top plate portion 50 and the side plate portion 52 of the square contact member 48, respectively.
The reinforcing member 60 is made of a metal, such as iron or aluminum, having a higher strength than the wood used as the material of the squaring member 38, or another type of wood, thereby being made thinner than the squaring member 48. Have sufficient strength (rigidity). Therefore, compared with the square contact member 48, the fastening belt 38
Bending deformation and local deformation are less likely to occur with respect to the pressing force from the contact.

Here, the area (pressing area) of the press-contact portion of the reinforcing member 60 to the square contact member 48 is larger than the press-contact area of the tightening belt 38 to the reinforcing member 60. Accordingly, the pressing force from the tightening belt 38 can be dispersed over a wide area by the reinforcing member 60 and can be applied to the squaring member 48. Therefore, it is necessary to tighten the squaring member 48 with the tightening belt 38 with a strong force. In some cases, the fastening belt 38
Even if the rigidity of the square contact member 48 cannot be sufficiently increased with respect to the tightening force, it is possible to prevent the square contact member 48 from being bent or locally deformed. As a result, the angular contact member 48 is bent or deformed locally, and
Distortion, deformation, and the like can be prevented from occurring in a part of the plurality of planographic printing plates 10 constituting the second plate 2.

[0043]

As described above, according to the planographic printing plate packing structure and the packing method of the present invention, the protection of a plurality of planographic printing plates constituting a plate bundle can be improved, and the stacking of a stacked bundle can be improved. And unpacking work can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a lithographic printing plate packaging structure according to an embodiment of the present invention.

FIG. 2 is a front view showing a configuration of a planographic printing plate packaging structure according to the embodiment of the present invention.

FIG. 3 is a perspective view for explaining a packing method of the planographic printing plate using the packing structure according to the embodiment of the present invention, showing a state before packing in the packing structure.

FIG. 4 is a front view showing a configuration example in a case where a reinforcing member is interposed between a square contact member and a fastening belt in the packing structure according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional planographic printing plate packaging structure.

[Explanation of symbols]

 Reference Signs List 10 planographic printing plate 12 plate bundle 20 packing structure 22 loading table (loading member) 24 pallet (loading member) 28 inclined plate (loading member) 30 loading support surface (supporting portion) 32 back plate (loading member) 38 tightening belt (Fixing means) 40 Belt buckle (belt adjusting member) 41 Lock lever (belt adjusting means) 44 Overturn prevention belt 54 Rubber sheet (buffer member) 56 Urethane sponge (buffer member) 60 Reinforcing member

Claims (7)

[Claims] 1. A stacking member configured to stack a plurality of planographic printing plates stacked in a thickness direction on a plate bundle, and to make a stacking support portion contact a bottom surface portion located on one end side of the plate bundle. A pair of square abutment members attached to the plate bundle so as to abut against both corners along the thickness direction on the other end surface side of the plate bundle stacked on the stacking member; and the pair of square abutments. The pair of members are pressed against the two corner portions of the plate bundle stacked on the stacking member, and the bottom surface of the plate bundle is pressed against the stacking support portion by the pressing force from the pair of square contact members. And a fixing means for restricting displacement of the square contact member with respect to the plate bundle and the stacking member. 2. The fixing device according to claim 1, wherein the fixing unit includes a tightening belt connected to the loading member and tightening the pair of square contact members so as to press the pair of square contact members against both corners of the plate bundle. The packaging structure of the lithographic printing plate described. 3. The lithographic plate according to claim 2, wherein said fixing means has a belt adjusting member capable of adjusting a length of a tightening portion of said tightening belt for tightening said pair of square contact members. Printing plate packaging structure. 4. An overturning belt connected to the loading member and wound around the outside of the plate bundle so as to limit the movement of the plate bundle in the thickness direction. Or the packing structure of the lithographic printing plate described in 3. 5. A flexible cushioning member is arranged between the square contact member and the plate bundle, and the square contact member is pressed against a corner portion of the plate bundle via the buffer member. The packaging structure for a lithographic printing plate according to claim 1, 2, 3, or 4. 6. A reinforcing member having a higher rigidity than the angular contact member with respect to a pressing force from the tightening belt is sandwiched between the tightening belt and the square applying member. The pressure contact area of the fastening belt with respect to the member is set larger than the pressure contact area of the fastening belt with the reinforcing member.
A packing structure for a lithographic printing plate according to 2, 3, 4 or 5. 7. A packaging method using the lithographic printing plate packaging structure according to claim 1, wherein a plurality of lithographic printing plates are stacked in the thickness direction. A stack of plates is stacked on the stacking member, and a stacking support portion of the stacking member is brought into contact with a bottom surface located on one end surface side of the stack of plates, and a surface direction of the stack of stacks stacked on the stacking member and the like. A pair of square abutment members are respectively attached to the plate bundle so as to abut against both corner portions on the end side, and the displacement of the pair of square abutment members with respect to the plate bundle and the stacking member is limited by the fixing means. The pair of square contact members are respectively pressed against the two corner portions on the other end side of the plate bundle stacked on the stacking member, and the bottom surface portion of the plate bundle is pressed by the pressing support force from the pair of square contact members. For packing a lithographic printing plate characterized by being pressed against a plate .