JP2006240703A - Packing structure for bundle of sheet and packing method for bundle of sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing structure for bundles of sheets and a packing method for the bundles of the sheets which can fix the bundles of the sheets with a sufficient fixing force even at the central part, and has no possibility of generating any gap. <P>SOLUTION: The packing structure for the bundles of the sheets is provided with the bundles of the sheets, a placing stand and a foaming member, wherein a face on the side coming into contact with the front face of the foaming member is a plane-like shape with a substantially the same width as the bundles of the sheets, has the thickest thickness in the central part, makes the thickness thinner toward both side edge parts, keeps the bundles of the sheets, the foaming member and the placing stand wound with a stretchable film, and is integrally fixed by a shrinking force of the stretchable film, and the packing method for the bundles of the sheets. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet bundle packaging structure and a sheet bundle packaging method, and in particular, when a sheet bundle is packed using a shrinkable film, the sheet bundle packaging structure capable of preventing deformation of the sheet bundle due to the shrinkage force of the shrinkable film. And a packing method.

  When handling lithographic printing plates, the number of lithographic printing plates is reduced to reduce the number of times they are handled and transported and stored at low cost, and to prevent deformation and damage of the lithographic printing plate during transportation and storage. A lithographic printing plate bundle is formed by stacking in the thickness direction, and the lithographic printing plate bundle is packed with a light-shielding packing material such as aluminum kraft paper as needed, and then loaded on a loading member such as a pallet. It has been done in general.

  As an example of such a packing structure, there is a packing structure described in Patent Document 1 that uses a chair-shaped stacking member having a bottom plate and a back plate that is inclined with respect to the bottom plate.

  The packing structure includes a lithographic printing plate bundle over the back plate of the stacking member, an end plate applied to the surface side of the lithographic printing plate bundle, and a suitable fastening means such as a bolt. It is to conclude with.

  However, in order to prevent deformation of the corners and sides of the lithographic printing plate due to impact during transportation and storage, the end plate was larger in size than the lithographic printing plate. Handling was inconvenient.

Therefore, the method of fixing the lithographic printing number to the skid by contracting the stretch film with a band method (Patent Document 2) by applying square contact to both side edges of the lithographic printing plate bundle placed on the skid. The method of performing (Patent Document 3) and the method of using both together were studied.
Japanese Patent No. 2873463 JP 2001-139055 A JP 2001-139056 A

  However, simply packing a lithographic printing plate placed on a skid with a shrinkable film such as a stretch film adds stress from the stretch film to the corners of the uppermost bundle constituting the lithographic printing plate bundle. There is a possibility that deformation occurs in the lithographic printing plate constituting the bundle.

  If square packing is applied to both side edges of the front side of the lithographic printing plate bundle placed on the skid and packed with stretch film, the problem that the lithographic printing plate deforms due to stress from the stretch film is solved, This time, the force for fixing the central portion of the lithographic printing plate bundle is insufficient, and a gap is generated in the central portion.

  The present invention has been made to solve the above-mentioned problem, and not only can the deformation be suppressed at both ends and the center of a sheet bundle such as a lithographic printing plate bundle, but also the sheet bundle can be sufficiently removed at the center. It is an object of the present invention to provide a sheet bundle packaging structure and a sheet bundle packaging method that can be fixed with a sufficient fixing force and that do not cause a gap.

  The invention according to claim 1 is a sheet bundle formed by stacking sheet-like materials in a thickness direction, a stacking table on which the sheet bundle is placed, and a surface of a sheet constituting the sheet bundle, A foam member placed on the front side opposite to the side contacting the loading table, the center of the foam member being thickest and thinning toward both side edges And the surface on the side in contact with the front surface is formed in a planar shape having substantially the same width as the sheet bundle, and the sheet bundle, the foam member, and the mounting table are made of an elastic film. It is related with the sheet | seat bundle packing structure characterized by being wound and fixed integrally.

  In the sheet bundle packaging structure, the foam member has substantially the same width as the sheet bundle. Therefore, the front surface of the sheet bundle is pressed evenly by the foamed member at both the center and both side edges. Further, the foam member is formed so that the central portion is thick and thin toward both ends.

  Accordingly, since the shrinkage force of the stretchable film is equally applied to both the front center portion and both end portions of the sheet bundle through the foamed member, stress is applied to both end portions of the sheet bundle by the shrinkage force of the stretchable film. Therefore, deformation of the sheet is suppressed. Further, since the sheet bundle is fixed with a sufficient force even in the central portion, no gap is generated between the sheet bundle and the stretchable film.

  The invention according to claim 2 relates to the sheet bundle packaging structure according to claim 1, wherein the width of the foamed member is 80 to 120% of the width of the sheet bundle.

  In the sheet bundle packaging structure, since a foam member having a width of 80 to 120% of the width of the sheet bundle is used, the center and both side edges of the front surface of the sheet bundle are under substantially equal pressure. Pressed.

  According to a third aspect of the present invention, in the sheet bundle packaging structure according to the first or second aspect, the front surface of the sheet bundle and the front surface are continuous between the sheet bundle and the foamed member, but are adjacent to each other. The present invention relates to a structure in which a square contact member that covers a pair of side surfaces that are not disposed is provided.

  In the sheet bundle packaging structure, since the front part of the sheet bundle is protected at the center part and both side edges by the square contact member, even when the width of the foamed member is smaller than the width of the sheet bundle, it is stretchable. It is possible to prevent stress from being applied to both ends of the sheet bundle due to the contraction force of the film.

  According to a fourth aspect of the present invention, in the sheet bundle packaging structure according to any one of the first to third aspects, the square contact member covers the front surface of the sheet bundle and one of the two side surfaces. The present invention relates to a structure that includes a first square plate and a second square plate that overlaps the first square plate in front of the sheet bundle and covers the other of the two side surfaces.

  In the sheet bundle packaging structure, since the square contact member can be divided into two parts, a first square contact plate and a second square contact plate, the configuration and disassembly of the sheet bundle packaging structure is easy.

  Invention of Claim 5 is the sheet | seat bundle packing structure as described in any one of Claims 1-3, The said square contact member covers the front surface of the said sheet bundle, and the said front cover part And a pair of side surface covering portions that cover the two side surfaces.

  In the sheet bundle packaging structure, the square contact member has a front cover portion and a pair of side surface cover portions integrated with each other, so that the shrinkage force of the shrinkable sheet can be equally applied to the sheet bundle.

  The invention according to claim 6 is the sheet bundle packaging structure according to any one of claims 1 to 5, wherein the stretchable film is made of a stretchable material and is pulled within a range not exceeding the yield point. And a stretch film that shrinks with a shrinkage force of a certain value or more.

  In the sheet bundle packaging structure, since the stretch film is used as the stretchable film, these can be integrally fixed by winding the stretch film around the stacking base, the sheet bundle, and the foam member. . Accordingly, it is not necessary to heat the stretchable film to integrally fix the stacking base, the sheet bundle, and the foamed member, so that the equipment for packing the sheet bundle is simplified. Further, it is also suitable for packing a sheet-like material that is easily altered by heat, such as a heat-sensitive lithographic printing plate.

  The invention according to claim 7 relates to the sheet bundle packaging structure according to any one of claims 1 to 5, wherein the stretchable film is a heat shrinkable film.

  The heat-shrinkable film shrinks with a strong shrinkage force when heated to a predetermined temperature, so that the sheet bundle and the foamed member can be more firmly fixed to the loading table.

  The invention according to claim 8 relates to the sheet bundle packaging structure according to any one of claims 1 to 7, wherein the sheet bundle is a planographic printing plate bundle in which planographic printing plates are laminated in the thickness direction. .

  The invention is an example in which the sheet bundle packaging structure of the present invention is applied to packaging of a planographic printing plate.

  The invention according to claim 9 is a step of placing a sheet bundle formed by stacking sheet-like materials in the thickness direction on a stacking table, and a surface of a sheet constituting the sheet bundle, the sheet stack being applied to the stacking table. The front surface located on the opposite side to the side in contact with the front surface is formed into a flat surface having substantially the same width as the sheet bundle, the center portion is thick, and both side edges A step of placing a foam member formed so as to be thin toward the surface, and a step of winding and fixing the sheet bundle, the foam member and the placement table together with an elastic film. The present invention relates to a sheet bundle packaging method.

  In the sheet bundle packaging method, since the mounting table, the sheet bundle, and the foam member are wound together with an elastic sheet and fixed integrally, the contraction force from the elastic sheet is applied to the sheet bundle. It is spread evenly over the entire front.

  Therefore, stress is prevented from being applied to both ends of the sheet bundle due to the shrinkage force of the stretchable film, so that deformation of the sheet-like material can be suppressed.

  In addition, since the foam member is formed so that the central portion is thick and the thickness is reduced toward both side edge portions, the sheet bundle is fixed with sufficient force even in the central portion, and the sheet bundle and the stretchability There is no gap between the film.

  As described above, according to the present invention, not only the deformation of both ends and the central portion of the sheet bundle is suppressed, but also the sheet bundle can be fixed with a sufficient fixing force at the central portion, and a gap is generated. No sheet bundle packing structure and sheet bundle packing method are provided.

  A packing structure which is an example of a sheet bundle packing structure according to the present invention will be described below.

  As shown in FIGS. 1 to 3, the packaging structure 100 according to the first embodiment includes a loading table 2, and a planographic printing plate bundle 10 that is placed on the loading table 2 in a substantially vertical state. A foaming member 4 that covers the front surface of the lithographic printing plate bundle 10 on the side opposite to the side in contact with the loading table 2 is provided. The planographic printing plate bundle 10 corresponds to the sheet-like bundle in the sheet-like packaging structure of the present invention.

  The planographic printing plate bundle 10 and the foamed member 4 are constrained by a back plate 22 </ b> A (described later) of the stacking table 2 by a stretch film 6.

  As shown in FIGS. 1 to 3, the stacking table 2 is formed in a chair shape as a whole, a mounting unit 22 on which the planographic printing plate bundle 10 is mounted, and a pedestal unit 24 that supports the mounting unit 22 from below. It is made up of.

  The mounting portion 22 is formed in a substantially L shape as a whole, and the mounting portion 22 includes a back plate 22A that is inclined with respect to the pedestal portion 24 and a mounting plate 22B that corresponds to the seat surface of the chair. Become. The back plate 22A is fixed to the pedestal 24 by a block 22C so as to be inclined by 9 to 15 degrees with respect to the vertical direction. The mounting plate 22B is inclined downward toward the back plate 22A. The surface of the back plate 22A and the mounting plate 22B on the side where the planographic printing plate bundle 10 contacts is the mounting surface 20.

  The pedestal portion 24 has a substantially rectangular upper plate 26 to which the mounting plate 22B of the mounting portion 22 is fixed, a substantially rectangular bottom plate 28, and a block-shaped leg that connects the upper plate 26 and the bottom plate 28. Part 27. A space 29 for inserting a fork of a forklift or a handlift is formed between the legs 27.

  The lithographic printing plate bundle 10 is obtained by laminating lithographic printing plates in the thickness direction, but it may be obtained by laminating only lithographic printing plates in the thickness direction, and lithographic printing plates and slip sheets are alternately laminated. It may be what you did. Furthermore, protective cardboards may be inserted above and below the lithographic printing plates laminated every predetermined number. In addition, it is preferable to pack the lithographic printing plate bundle 10 with interior paper so that the lithographic printing plate can be protected from changes in light, temperature, and humidity from the outside. Examples of the interior paper include those in which an aluminum foil is attached to kraft paper, and a moisture-proof / light-shielding layer such as a polyethylene resin or a black polyethylene resin is provided as necessary.

  Examples of the lithographic printing plate constituting the lithographic printing plate bundle 10 include a photosensitive lithographic printing plate and a heat-sensitive lithographic printing plate.

  As shown in FIGS. 1 to 3, the foam member 4 has a flat surface on the side contacting the front surface 10 </ b> A of the planographic printing plate bundle 10, that is, a bottom surface 42, and a surface 44 opposite to the bottom surface 42 is cylindrical. It is formed in a bowl shape as a whole.

  The width W of the bottom surface 42 of the foam member 4 is preferably the same as the width w of the planographic printing plate bundle 10, but may be in the range of 80 to 120% of the width w.

  As a form of the foam member 4, a semi-columnar shape as shown in FIG. 4 can be used in addition to a bowl shape as shown in FIG. In addition, as shown in FIG. 5, a form in which four foamed plates 4A, 4B, 4C, and 4D in which foamed materials are formed in a plate shape are superposed and fixed to each other is also possible.

  In the form shown in FIG. 5, the foam plates 4 </ b> A to 4 </ b> D can be fixed by means such as adhesion with a double-sided pressure-sensitive adhesive tape or adhesive, or fixing with a pressure-sensitive adhesive tape. The foam plates 4A to 4D are formed such that, of the two adjacent sheets, the side closer to the lithographic printing plate bundle 10 is wider than the side farther.

  Examples of the foam material that can be used to form the foam member 4 include a foamed polyethylene material, a polystyrene foam material, and a urethane foam material. The expansion ratio is preferably in the range of 5 to 30 times, particularly 5 times for the foamed polyethylene material and about 30 times for the polystyrene foam.

  The stretch film 6 is a film formed from a stretchable material. When the stretch film 6 is stretched within a range not exceeding the yield point, the stretch film 6 contracts with a contraction force of a certain value or more. As the stretch film 6, a uniaxial or biaxially stretched film formed from polyethylene resin, ethylene / propylene copolymer resin, ethylene / vinyl acetate copolymer resin, polyvinyl chloride resin, polyethylene terephthalate resin or the like is used. The If a self-adhesive film such as LLDPE (linear low density polyethylene) is used as the stretch film 6, the end can be fixed without using fixing means such as an adhesive tape, an adhesive, and a fastener.

  The vertical width of the stretch film 6 may be the same as the vertical dimension of the planographic printing plate bundle 10 but may be slightly larger or smaller than that. When the stretch film 6 having a width smaller than the vertical dimension of the planographic printing plate bundle 10 is used, the stretch film 6 is placed around the back plate 22A, the planographic printing plate bundle 10 and the foamed member 4 of the mounting portion 22. The back plate 22A, the planographic printing plate bundle 10 and the like may be covered by spirally winding a plurality of times.

  The procedure for configuring the packing structure 100 is as follows.

  First, the planographic printing plate bundle 10 is placed on the loading table 2 and packed with interior paper as necessary.

  Next, the foam member 4 is placed on the front surface 10 </ b> A of the planographic printing plate bundle 10.

  When the foam member 4 is placed, the lithographic printing plate bundle 10 and the foam member 4 are wound together with the stack 2 by the stretch film 6. The number of times of winding with the stretch film 6 may be only once, or may be twice or more. As a result, the planographic printing plate bundle 10 is restrained to the stacking base 2 together with the foam member 4.

  In order to constrain the lithographic printing plate bundle 10 to the stacking base 2, a heat shrinkable film may be used instead of the stretch film 6. In this case, the lithographic printing plate bundle 10 is wound together with the loading table 2 with a heat-shrinkable film, and the end of the heat-shrinkable film is fixed by an appropriate means such as a tape, and then hot air is blown onto the heat-shrinkable film. What is necessary is just to heat-heat-shrink.

  In the packaging structure 100 according to the first embodiment, since the foam member 4 is in contact with the front surface 10A of the planographic printing plate bundle 10, the shrinkage force of the stretch film 6 is equally applied to the planographic printing plate bundle 10. . Accordingly, it is possible to suppress deformation of the planographic printing plate constituting the planographic printing plate bundle 10 by applying stress to both ends of the planographic printing plate bundle 10.

  Therefore, it is suitably used for packing and transporting a lithographic printing plate having a plate-making surface that is easily damaged, such as a laser printing plate, in units of about 200 to 2000 sheets.

  Further, since the planographic printing plate bundle 10 is placed on the stacking table 2 in a vertically oriented state, the planographic printing plates can be easily taken out one by one after the packing structure 100 is unpacked.

  In addition, although this Embodiment 1 described about the example whose sheet-like material is a lithographic printing plate, if it is a sheet-like sheet-like thing, it will not be limited to a lithographic printing plate, For example, a metal plate is a sheet-like shape. The present invention can also be applied to the packaging of single wafer sheets cut into a square or rectangular shape.

2. Embodiment 2
Another example of the packing structure included in the sheet bundle packing structure according to the present invention will be described below.

  As shown in FIGS. 6 to 9, the packing structure 102 according to the second embodiment includes a loading table 2, and a planographic printing plate bundle 10 that is placed on the loading table 2 in a substantially vertical state. The lithographic printing plate bundle 10 is provided with a foam member 4 placed on the front surface opposite to the side in contact with the loading table 2. 6 to 9, the same reference numerals as those in FIGS. 1 to 3 indicate the same components as those shown in FIGS. 1 to 3.

  A square contact member 8 is interposed between the planographic printing plate bundle 10 and the foamed member 4.

  The square contact member 8 may be divided into a square contact member 8A and a square contact member 8B as shown in FIGS. 6 to 9, and abuts against the front surface 10A of the planographic printing plate bundle 10 as shown in FIG. The front cover portion 82 and the two side cover portions 84 that contact the side surface 10B continuous with the front surface 10A may be integrally formed.

  The square contact member 8 is preferably formed by folding a corrugated cardboard or a sheet formed of a plastic sheet into a corrugated cardboard shape into an L-shape because it has a buffering property.

  In the packing structure 102 according to the second embodiment, the front surface 10A of the lithographic printing plate bundle 10 is protected by the square contact member 8 at both the center and both side edges. Further, the lithographic printing plate bundle 10 is more evenly added via the square contact member 8.

  Therefore, stress is prevented from being applied to both end portions of the lithographic printing plate bundle 10, and deformation of the lithographic printing plate constituting the lithographic printing plate bundle 10 is suppressed.

  Moreover, since the impact applied from the front is relieved not only by the foaming member 4 but also by the square contact member 8, the planographic printing plate bundle 10 is not damaged by the impact.

FIG. 1 is a perspective view of the packaging structure according to the first embodiment when viewed from diagonally forward. FIG. 2 is an explanatory diagram illustrating an internal structure of the packing structure according to the first embodiment. FIG. 3 is a cross-sectional view showing a cross section of the packing structure according to Embodiment 1 cut along a plane orthogonal to the back plate of the loading table. FIG. 4 is a cross-sectional view illustrating another example of the foam member used in the packaging structure according to the first embodiment. FIG. 5 is a cross-sectional view showing still another example of the foamed member used in the packing structure according to the first embodiment. FIG. 6 is a perspective view of the packing structure according to the second embodiment when viewed from obliquely forward and upward. FIG. 7 is an explanatory view showing the internal structure of the packing structure according to the second embodiment. FIG. 8 is a cross-sectional view showing a cross section of the packing structure according to the second embodiment, cut along a plane orthogonal to the back plate of the loading table. FIG. 9 is a cross-sectional view illustrating another example of a square contact member used in the packing structure according to the second embodiment.

Explanation of symbols

2 Loading platform 4 Foam member 4A Foam plate 6 Stretch film 8 Square contact member 8A Square contact plate 8B Square contact plate 10 Planographic printing plate bundle 10A Front surface 10B Side surface 20 Mounting surface 22 Mounting portion 22A Back plate 22B Mounting plate 22C Block 24 pedestal portion 26 upper plate 27 leg portion 28 bottom plate 29 space 42 bottom surface 82 front cover portion 84 side cover portion 100 packing structure 102 packing structure

Claims (9)

A sheet bundle formed by laminating sheet-like materials in the thickness direction;
A loading table on which the sheet bundle is placed;
A foam member placed on the front surface located on the opposite side of the surface of the sheets constituting the sheet bundle and contacting the stacking table;
The foamed member is formed such that the center portion is thickest and the thickness is reduced toward both side edge portions, and at the same time, the surface on the side contacting the front surface is substantially the same width as the sheet bundle. And is formed in a planar shape having
The sheet bundle packaging structure, wherein the sheet bundle, the foam member, and the mounting table are wound together by an elastic film and fixed integrally.   The sheet bundle packaging structure according to claim 1, wherein a width of the foam member is 80 to 120% of a width of the sheet bundle.   The square contact member which covers the front surface of the said sheet bundle and a pair of side surface which is continuous with the said front surface but is not mutually adjacent | abutted between the said sheet bundle and the said foaming member is arrange | positioned. The sheet bundle packaging structure according to 2.   The square contact member is overlapped with the first square contact plate on the front surface of the sheet bundle and the first square contact plate covering one of the two side surfaces, and the two side surfaces. The sheet bundle packing structure according to any one of claims 1 to 3, comprising a second square pad that covers the other of the two.   The square contact member includes a front cover portion that covers the front surface of the sheet bundle and a pair of side surface cover portions that are provided integrally and continuously with the front cover portion and cover the two side surfaces. The sheet bundle packaging structure according to any one of claims 1 to 3.   The sheet according to any one of claims 1 to 5, wherein the stretchable film is made of a stretchable material and is a stretch film that shrinks with a shrinkage force of a certain value or more when pulled within a range not exceeding the yield point. Bundle packing structure.   The sheet bundle packaging structure according to any one of claims 1 to 5, wherein the stretchable film is a heat-shrinkable film.   The sheet bundle packaging structure according to any one of claims 1 to 7, wherein the sheet bundle is a lithographic printing plate bundle obtained by laminating lithographic printing plates in a thickness direction. Placing a sheet bundle formed by stacking sheet-like materials in the thickness direction on a loading table;
Formed on the front surface of the sheet constituting the sheet bundle on the opposite side to the side contacting the stacking base, with a thick central portion and a small thickness toward both side edges. And a step of placing a foamed member formed in a planar shape in which the surface abutting on the front surface has substantially the same width as the sheet bundle,
A method of packing a sheet bundle, comprising the step of winding and fixing the sheet bundle, the foam member, and the mounting table together with an elastic film.

Images