JP2008222284A - Conveyance structure for lithographic printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance structure for a lithographic printing plate, which can prevent the displacement of the lithographic printing plate. <P>SOLUTION: The conveyance structure 10 is constituted by placing a stacked body of PS plates 14 on the placing surface of a trestle 22 with leg sections 26. Stoppers 30 are mounted as horizontal-oscillation suppressing means for suppressing horizontal oscillation, on the trestle 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transport structure for a lithographic printing plate, and more particularly to a transport structure for a lithographic printing plate that does not cause a quality failure in the lithographic printing plate due to vibration or impact during transportation or cargo handling.

  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 subjected to surface treatment such as graining, anodic oxidation, 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 application | coating and a drying process. The manufactured lithographic printing plate is subjected to plate making processes such as exposure, development, and gumming, and is set in a printing machine. Then, ink is applied to the lithographic printing plate set in the printing machine, and this is transferred to print characters, images, etc. on the paper.

  By the way, when handling a lithographic printing plate, a large number of lithographic printing plates are stacked in the thickness direction to form a lithographic printing plate bundle, and the lithographic printing plate bundle is light-shielded packaging such as aluminum kraft paper if necessary. It is a common practice to pack with materials and load them onto a loading member such as a pallet or skid. By adopting such a transport structure, it is possible to reduce the number of times of handling and transport and store at low cost, and to prevent deformation and damage of the planographic printing plate during transport and storage. .

In Patent Document 1, as shown in FIGS. 15 (a) and 15 (b), there is shown a transport structure in which a lithographic printing plate package 2 is laminated on a pedestal (skid) 1 with legs. . According to this transport structure, the planographic printing plate can be transported together with the skid by a forklift or the like.
JP 2005-29174 A

  However, when the transport structure of Patent Document 1 is transported by a truck or the like, the skid 1 sways in a cradle shape as shown in FIGS. 15 (a) and 15 (b) mainly due to the influence of pitching. There was a problem that several lithographic printing plates were displaced laterally due to the impact. When the lithographic printing plate is misaligned, the automatic feeding when it is set on the automatic plate making machine does not work properly, or the lithographic printing plate surface (photosensitive surface or heat-sensitive surface) is damaged when misaligned. There is a fear. In particular, in the case of laser exposure type lithographic printing plates that are widely used in recent years, the plate-making surface is weaker than previous lithographic printing plates, so the plate-making surface is easily damaged by vibration and impact during transportation and cargo handling. There was a need for improvement.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a transport structure for a lithographic printing plate that can prevent displacement of the lithographic printing plate.

  In order to achieve the above object, the invention according to claim 1 is a planographic printing plate transport structure in which a laminate of a planographic printing plate is placed on a placement surface of a stand having legs, Is characterized in that a roll restraining means for restraining the roll is provided. According to the first aspect of the present invention, since the roll suppressing means is provided, it is possible to prevent the lithographic printing plate from being displaced during transportation.

  According to a second aspect of the present invention, in the first aspect of the present invention, the roll suppression means is a stopper that is detachably attached to the leg portion, and the stopper has an outermost position of a portion that contacts the floor surface. It is arrange | positioned outside the mounting surface of the said mount frame, It is characterized by the above-mentioned. According to the invention of claim 2, since the outermost position of the ground contact portion of the stopper is disposed outside the placement surface, the gantry can be stabilized and the rolling of the planographic printing plate can be suppressed. .

  The invention according to claim 3 is the invention according to claim 2, wherein the stopper is a block body in which a groove into which the leg portion is inserted is formed on an upper surface. According to the invention of claim 3, the stopper can be mounted only by inserting the leg portion of the pedestal into the groove of the stopper.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the roll suppressing means is a base member having an area larger than a mounting surface of the gantry, and the gantry is fixed on the base member. It is characterized by that. According to invention of Claim 4, since a mount frame is fixed to the base member of an area larger than a loading surface, rolling can be suppressed.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the roll restraining means is a vibration absorbing material laid below the leg portion. According to the fifth aspect of the present invention, since the vibration absorbing material is provided below the leg portion, the roll can be reduced.

  According to a sixth aspect of the present invention, in the first aspect of the present invention, the leg portion is characterized in that an outermost position of a portion that contacts the floor surface is arranged outside the mounting surface of the gantry. According to the invention of claim 6, since the outermost position of the ground contact portion of the leg portion is disposed outside the mounting surface, the gantry can be stabilized, and the swaying of the gantry can be suppressed.

  According to the present invention, since the roll restraining means is provided on the gantry, it is possible to prevent the planographic printing plate from being displaced during transportation. Accordingly, the automatic supply of the lithographic printing plate can be reliably performed when set in the automatic plate making machine, and the deterioration of the quality of the lithographic printing plate due to misalignment can be prevented.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a planographic printing plate transport structure according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing the configuration of the transport structure 10 according to the present embodiment, and shows a state in which the stoppers 30 and 30 are removed from a skid (corresponding to a gantry having legs). FIG. 2 is a perspective view showing an internal configuration of the package 12 of FIG. 3 and 4 show a front view and a side view of the transport structure 10 of FIG. 1, and the stoppers 30 and 30 are indicated by dotted lines.

  The transport structure 10 shown in these drawings is a transport mode for transporting a large number of planographic printing plates 14 (hereinafter referred to as PS plates) as a package 12. As shown in FIG. 2, the packaging body 12 is manufactured by packaging a laminated bundle of PS plates 14 placed on a stacking plate 16 with an interior material 18. The loading plate 16 is made of vinyl chloride or a vinyl chloride frame made by integrating protective cardboard with an adhesive means, and is formed in a rectangular shape smaller than a skid plate 24 described later. Also, the loading plate 16 is larger than the PS plate 14, and when the PS plate 14 is stacked, one corner portion of the PS plate 14 is aligned with one corner portion of the loading plate 16. Is preferred.

  The stacked bundle of PS plates 14 is obtained by alternately stacking PS plates 14 and slip sheets (not shown) in the thickness direction, and for protecting each end face in the stacking direction or a predetermined number of PS plates 14. Cardboard (not shown) is inserted. The PS plate 14 is formed on a thin aluminum support formed in a rectangular plate shape on a coating film (a photosensitive layer in the case of a photosensitive printing plate, a heat sensitive layer in the case of a heat sensitive printing plate, and further necessary. Accordingly, an overcoat layer, a mat layer, or the like is applied. The coating film is subjected to plate making processing such as exposure, development processing, and gumming, and is set in a printing machine, and ink is applied to print characters, images, and the like on the paper surface. Note that the PS plate 14 of the present embodiment is a stage before processing (exposure, development, etc.) necessary for printing is performed. Further, the number of PS plates 14 constituting one stacked bundle is not particularly limited, but may be, for example, 10 to 500 from the viewpoint of improving the efficiency of transportation and storage. When the number of PS plates 14 is 10 or more, the handling efficiency can be improved. When the number of the PS plates 14 is 500 or less, the weight of the stacked bundle itself is limited, and the workload in handling the load is reduced. Furthermore, it is also possible to form a laminated bundle with a large number of PS plates so that they can be transported and stored more efficiently (with a smaller number of times of handling of cargo). For example, the number of PS plates 14 may be about 500 to 3000. Further, depending on the type of the PS plate 14, a laminated bundle may be configured by omitting one or both of the interleaving paper and the protective cardboard.

  A top member 20 is laminated on the laminated bundle of PS plates 14. The top member 20 is made of cardboard or a material obtained by laminating polyethylene on both sides of the cardboard, and the surface shape thereof is the same shape and the same size as the PS plate 14. At least one sheet is placed.

  The stacking plate 16, the stacked bundle of PS plates 14, and the top surface member 20 are packaged with interior paper 18. The interior paper 18 is made of a paper having a light shielding property and a moisture proof property, and the interior paper 18 is used for packaging so that the PS plate 14 is completely blocked from the outside. The material of the interior paper 18 is not particularly limited as long as the laminated bundle of PS plates 14 can be completely cut off from the outside. For example, one rectangular kraft paper can be used. Moreover, you may use the thing comprised by sticking the metal thin film of predetermined thickness on this kraft paper, and bonding the resin layer of predetermined thickness on this metal thin film depending on the case. Furthermore, use a material with improved light-shielding and moisture-proofing properties, such as attaching a low-density polyethylene layer of 10 to 70 μm to a metal thin film, or bonding a black polyethylene film of about 70 μm to the low-density polyethylene layer. You can also. In general, a photosensitive printing plate has high photosensitivity, and even when exposed to light in a slight visible light wavelength band, a change occurs in the photosensitive layer, so that it is necessary to shield it from light. Further, the heat-sensitive printing plate is also preferably subjected to appropriate light shielding because the heat-sensitive layer may be altered by the thermal energy of the light hit or the sensitivity may change due to the progress of the reaction. Furthermore, when subjected to a sudden change in humidity or temperature, any printing plate will be moisture-proof because of the inconvenience that dew condensation occurs on the photosensitive layer or the heat-sensitive layer, or the adhesive layer adheres to the interleaf. Need arises. Since the interior paper 18 is configured as described above and has a certain light-shielding property and moisture-proof property, alteration of the photosensitive layer or heat-sensitive layer of the PS plate 14 is prevented, and the PS plate 14 is maintained at a constant quality. .

  The shape of the interior paper 18 and the interior structure (how to fold the interior paper 18) are not particularly limited as long as the laminated bundle of PS plates 14 can be moisture-proof and light-shielded. The inner side paper 18 is surrounded by the outer periphery of the laminated bundle, the short side portion of the inner side paper 18 surrounding the laminated bundle is folded forward toward the top member 20, and then the inner side paper 18 of the long side portion is folded. By folding the sheet toward the top member 20, the interior paper 18 can be folded well. After the interior, it is preferable to attach the folded portion of the interior paper 18 by a fixing means such as an adhesive tape.

  The internal configuration of the package 12 is not limited to the above-described embodiment. For example, the package 12 may be packaged every predetermined number of PS plates 14, and a plurality of the packages may be stacked.

  As described above, the package 12 is constituted by the skid 22. The skid 22 includes a rectangular skid plate (corresponding to a mounting surface) 24 and legs 26 and 26 attached to the lower surface of the skid plate 24. The leg portion 26 is formed in a substantially U shape by bending one pipe (see FIG. 4). That is, the leg portion 26 is formed in a shape in which two vertical portions are connected by a horizontal portion, and a connecting portion between the vertical portion and the horizontal portion is formed in an arc shape. The skid plate 24 is supported by the two legs 26 and 26 at a position away from the floor surface. By inserting a fork of a forklift (not shown) below the skid plate 24, the skid 22 is entirely formed. Can be lifted.

  The package 12 described above is placed on the skid plate 24 of the skid 22, and the top plate 32 is placed on the package 23. The top plate 32 is formed in a plate shape substantially the same as the skid plate 24, that is, a rectangular shape. After the top plate 32 is placed on the packaging body 12, a fixing band 34 is wound around the top plate 32 and the skid plate 24. Thereby, the package 12 is fixed between the top plate 32 and the skid plate 24. Note that the packaging body 12 may be fixed to the skid plate 24 without using the top plate 32.

  Next, the stopper 30 which is a characteristic part of the present invention will be described. As shown in FIG. 1, the stopper 30 is configured by a rectangular parallelepiped block. The material of the stopper 30 is not particularly limited. For example, in addition to resin and wood, a cushioning material such as foamed polystyrene and hard rubber can be used.

  A bottomed groove 36 into which the leg portion 26 of the skid 22 is inserted is formed on the upper surface of the stopper 30. By inserting the leg portion 26 into the groove 36, the skid plate 24 is engaged with and supported by the upper surface of the stopper 30.

  The width W1 (see FIG. 4) of the stopper 30 is formed larger than the width W2 of the skid plate 24. When the stopper 30 is mounted on the skid 22, both end portions of the stopper 30 protrude on both sides of the skid plate 24. It is supposed to be. At that time, the larger the protruding amount a on one side, the more the skid 22 can be stabilized. On the other hand, since the transport efficiency is deteriorated, 0 to 200 mm is preferable, 0 to 50 mm is more preferable, and 2 to 20 mm is further preferable. Note that the protrusion amount a may be 0 (that is, W1 and W2 may be equal).

  Next, the operation of the transport structure 10 configured as described above will be described.

  When transport is performed without using the stopper 30 (that is, in the conventional case), the range in which the leg portion 26 contacts the floor is on the inner side than the skid plate 24. That is, a point Q at which the leg portion 26 contacts the outermost surface with respect to the floor surface (see FIG. 4; hereinafter referred to as the outermost contact point) is on the inner side of the end surface in the width direction of the skid plate 24. In this case, the problem arises that the skid 22 on which the package 12 is placed tends to roll. In particular, since the leg portion 26 of the skid 22 is normally bent in an arc shape, there arises a problem that it tends to roll due to vibration. When the skid 22 rolls, the PS plate 14 in the package 12 is liable to be displaced, which causes a feeding failure in the automatic plate making machine.

  Therefore, in the present embodiment, stoppers 30 and 30 are attached to the leg portions 26 and 26 of the skid 22. The stoppers 30, 30 are formed wider than the skid plate 24, and when the stoppers 30, 30 are attached to the leg portions 26, 26, both end portions of the stopper 30 protrude from the skid plate 24. The That is, the outermost grounding points P and P of the stoppers 30 and 30 are disposed outside the skid plate 24. By setting it as such a conveyance form, the skid 22 can be stabilized and the rolling of the skid 22 can be suppressed. Thereby, it is possible to prevent the PS plate 14 in the package 12 from being displaced due to rolling.

  As described above, according to the present embodiment, the stopper 30 is attached to the skid 22 to prevent rolling, so that the positional deviation of the PS plate 14 can be prevented. In particular, in the present embodiment, the stopper 30 is detachably attached to the skid 22, so that the conventional skid 22 can be used, and the positional displacement of the PS plate 14 can be prevented without significantly increasing the cost. Can do.

  The shape of the stopper 30 is not limited to the above-described embodiment. For example, instead of the groove 36, a hole penetrating vertically is formed, and the leg portion 26 of the skid 22 is inserted into this hole. May be. Further, as shown in FIG. 5, a stopper 40 having a U-shaped cross section may be used. Also in this case, the stopper 40 can be attached to the skid 22 by inserting the leg portion 26 of the skid 22 into the central groove 42.

  The stopper 44 shown in FIG. 6 includes an elastic engagement portion 46 that extends from the lateral side of the skid plate 24 to the upper surface side with respect to the stopper 30 shown in FIGS. 1 and 4. According to the stopper 44, the elastic engagement portion 46 engages with the skid plate 24, so that the stopper 44 can be attached to the skid 22 more reliably.

  FIG. 7 shows small stoppers 50 and 50. The stopper 50 is connected to a C-shaped fitting portion 52 that is fitted to a vertical portion of the leg portion 26, a vertical column portion 54 that supports the C-shaped fitting portion 52, and a lower portion of the column portion 54. And a grounding portion 56 extending on the opposite side of the C-shaped fitting portion 52. According to this stopper 50, since the grounding portion 56 is disposed outside by fitting the C-shaped fitting portion 52 to the vertical portion of the leg portion 26, the grounding range with the floor surface is widened, and the skid 22 is It can be stabilized. In the case of the stopper 50 as well, it is preferable that the outermost contact point with the floor surface be outside the skid plate 24. The stopper 50 is preferably configured such that the C-shaped fitting part 52 and the grounding part 56 can be folded or separated with respect to the column part 54.

  Next, a transport structure according to a second embodiment will be described with reference to FIGS.

  As shown in these drawings, in the second transport structure 60, skids 22, 22, 22 are fixed on a pallet (corresponding to a base member) 62. The entire pallet 62 is formed in a rectangular plate shape having a larger area than the skid plate 24. Further, the pallet 62 is formed with holes 64, 64... Into which forks (not shown) of the forklift can be inserted.

  As shown in FIG. 9, the skid 22 is placed on the pallet 62 and then fixed by a binding band 66. The binding band 66 is not particularly limited, but is preferably inserted into the hole 64 of the pallet 62 and wound around the skid 22.

  According to the second embodiment configured as described above, since the skid 22 is fixed on the pallet 62 having a larger area than the skid plate 24, the transport can be performed in a more stable state.

  In the above-described second embodiment, the three skids 22 are fixed to the pallet 62, but the number of the skids 22 to be fixed may be two or less or four or more.

  Further, in the second embodiment described above, the binding band 66 is used to fix each skid 22 to the pallet 62, but the fixing means is not limited to this. For example, as shown in FIG. The stretch film 68 which has a stretching property may be sufficient. As the stretch film 68, a single layer film such as low density polyethylene (LDPE), linear polyethylene (LLDPE), ethylene vinyl acetate copolymer (EVA), or a multilayer film combining these can be applied. The thickness is preferably 15 to 50 μm and can be extended by 120 to 200%. Furthermore, it is preferable that the stretch film 68 is used while being stretched by 120 to 200%, whereby the skid 22 and the packaging body 12 can be firmly fixed by the restoring force that the stretch film 68 tries to shrink. In addition, when a heat-shrinkable film is used instead of the stretch film 68, a single layer film such as low density polyethylene (LDPE), polypropylene (PP), ethylene vinyl acetate copolymer (EVA), or these A combined multilayer film can be applied, and the thickness is preferably 100 to 200 μm.

  In the second embodiment described above, the plurality of skids 22, 22... Are fixed using the pallet 62. However, the present invention is not limited to this. For example, the block 70 shown in FIGS. , 70 may be used for fixing. The block 70 is formed in an elongated rectangular parallelepiped shape, and its length is longer than the width W2 × 3 of the three skid plates 24. Therefore, the three skids 22, 22,... Can be placed so as to straddle the two blocks 70, 70. Each skid 22 is fixed to the block 70 by a band 72. According to the transport structure configured in this way, each skid 22 is supported by the block 70 having a ground contact width wider than that of the skid plate 24, so that it is possible to prevent rolling.

  FIG. 13 is a side view showing a transport structure 80 according to the third embodiment. In the transport structure 80 shown in the figure, a vibration absorbing member 82 is laid under the skid 22. The vibration absorbing member 82 only needs to be capable of absorbing vibration, and for example, a vibration proof rubber, an air cushion, a foam cushioning material, or the like is used. The vibration absorbing member 82 may be fixed to the leg portion 26 or only the leg portion 26 may be placed thereon. Further, a groove having a circular arc cross section for positioning the leg portion 26 may be formed on the upper surface of the vibration absorbing member 82.

  According to the third embodiment configured as described above, vibration transmitted from the floor surface to the skid 22 can be absorbed by the vibration absorbing member 82, so that the vibration of the skid 22 can be suppressed. Rolling can be prevented.

  Note that the third embodiment may be combined with the first and second embodiments described above. That is, the vibration absorbing member 82 may be laid on the lower side of the stoppers 30, 40, 44 or on the lower side of the gantry 62.

  FIG. 14 is a side view showing the transport structure according to the fourth embodiment. The transport structure 90 shown in the figure is bent such that the leg portion 92 of the skid 22 protrudes to the outside of the skid plate 24, and the outermost grounding points R and R of the leg portion 92 are in the plan view. It is arranged at the same position as the end face of 24 or outside thereof. Thereby, skid 22 can be stabilized and position shift of PS plate 14 in package 12 can be prevented.

The perspective view which shows the structure of the conveyance structure of 1st Embodiment. The perspective view which shows the internal structure of a package body Front view of the transport structure of FIG. Side view of the transport structure of FIG. The perspective view which shows the stopper of a shape different from FIG. Side view showing a stopper of a different shape from FIG. The perspective view which shows the stopper of a different structure from FIG. Side view showing the structure of the transport structure of the second embodiment The front view which shows the structure of the conveyance structure of FIG. FIG. 8 is a side view showing a transport structure having fixing means different from FIG. Side view showing a transport structure having a different configuration from that of FIG. Front view of the transport structure of FIG. Side view showing the structure of the transport structure of the third embodiment Side view showing the structure of the transport structure of the fourth embodiment Explanatory drawing of conventional transport structure

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Conveyance structure, 12 ... Packing body, 14 ... PS plate, 16 ... Loading board, 18 ... Interior paper, 20 ... Top member, 22 ... Skid, 24 ... Skid board, 26 ... Leg part, 30 ... Stopper, 32 ... Top plate, 34 ... Fixing band, 36 ... Groove, 40 ... Stopper, 42 ... Groove, 44 ... Stopper, 46 ... Elastic engagement portion, 50 ... Stopper, 52 ... C-shaped fitting portion, 54 ... Strut portion 56 ... Grounding part, 60 ... Transport structure, 62 ... Pallet, 64 ... Hole, 66 ... Binding band, 68 ... Stretch film, 70 ... Block, 72 ... Band, 80 ... Transport structure, 82 ... Vibration absorbing member, 90 ... transport structure, 92 ... legs

Claims (6)

In the transport structure of a lithographic printing plate formed by placing a laminate of a lithographic printing plate on a mounting surface of a gantry having legs,
A lithographic printing plate transport structure, wherein the gantry is provided with rolling suppression means for suppressing rolling.   The roll suppression means is a stopper that is detachably attached to the leg portion, and the stopper is arranged such that the outermost position of the portion that contacts the floor surface is disposed outside the mounting surface of the gantry. 2. The transport structure for a lithographic printing plate according to claim 1, wherein the transport structure is a lithographic printing plate transport structure.   The lithographic printing plate transport structure according to claim 2, wherein the stopper is a block body in which a groove into which the leg portion is inserted is formed on an upper surface.   The planographic printing plate according to claim 1, wherein the roll suppressing means is a base member having an area larger than a mounting surface of the gantry, and the gantry is fixed on the base member. Transport structure.   The lithographic printing plate transport structure according to any one of claims 1 to 4, wherein the roll suppressing means is a vibration absorbing material laid under the leg portion.   2. The planographic printing plate transport structure according to claim 1, wherein an outermost position of a portion of the leg that is in contact with the floor surface is disposed outside a mounting surface of the gantry.

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