JPH10194351A - Packaging method of photosensitive lithographic printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent stacked PS plates from slipping out of place, by effectively applying the fastening force of a film on the PS plates. SOLUTION: The outer periphery of PS plates 16 stacked on a base frame is covered with a shading packaging body and corrugated cardboard 24 is arranged at the outer periphery of the shading packaging body 20 to form an exterior. And further, reinforced corrugated cardboard is attached to specified positions of the outer periphery of the corrugated cardboard 24 and a stretch film 28 is wound thereon by a specified number of rounds. The stacked PS plates 16 are laterally clamped and fixed by the restoring force of the stretch film 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for packaging a photosensitive lithographic printing plate, and more particularly to a method for packaging a photosensitive lithographic printing plate for transporting and storing a number of stacked photosensitive lithographic printing plates.

[0002]

2. Description of the Related Art A photosensitive lithographic printing plate (hereinafter, referred to as a PS plate (Pre-Sensitized Plate)) used for a rotary press or the like has a photosensitive resin layer formed on a surface of a support made of an aluminum plate or the like. And a large number (200 to 15
00 sheets) are packed and stacked on a plate stand, and transported and stored in this state.

[0003] Conventionally, as a method of packaging a PS plate, there is a method for packaging a PS plate,
No. 2-6035 (hereinafter abbreviated as "prior art A"), Japanese Utility Model Publication No. 7-9156 (hereinafter abbreviated as "prior art B"), and Japanese Unexamined Patent Publication No. Hei 6-100064 (hereinafter referred to as "prior art A"). Technology C), and JP-A-5-10
No. 0367 (hereinafter abbreviated as “prior art D”).

The packaging method of the prior art A is such that a large number of PS plates 3 are sandwiched between the plate base 2 and the top plate 4, and the top plate 4 is fastened to the plate base 2 with bolts 5 and nuts 8. , P
The S plate 3 is fixed in the thickness direction. In the packaging method of the prior art B, a large number of PS plates 10 are stacked on a plate base 24 and then tied with a string 12 to fix the PS plates 10 in the thickness direction.

[0005] In the packaging method of the prior art C, a large number of PS plates 104 are stacked on a plate stand 105, and then the PS plates 104 are tightly packaged in a lateral direction with a moisture-resistant film. And a package having the following. The packaging method shown in FIG.
Are stacked on a platen, and the PS plate 1 is fixed in the surface direction by a stretch film 9 having both light-shielding properties, moisture-proofing properties and binding properties. In the packaging method shown in FIG. 2, the PS plate 1 is placed on the bottom plate 5 and leaned against the back plate 6, and the PS plate is sandwiched between the back plate 6 and the top plate 11. It is wrapped with a stretch film 9.

[0006]

However, in the packaging methods of the prior arts A and B, the PS plates are fixed in the thickness direction, so that the PS plates come into close contact with each other, and the PS plates are automatically made by an automatic plate making machine (Fuji Photo FNR401, 402 manufactured by Film Co., Ltd.
And the like, a problem arises in that the PS plate does not peel off when separated and supplied one by one.

[0007] Such a problem can be solved by fixing the PS plate in the plane direction as shown in the prior arts C and D. However, the packaging methods of the prior arts C and D have a disadvantage that the PS plate is easily displaced due to vibration or impact during transportation, even though the PS plate is fixed in the plane direction. Such problems can be solved by increasing the film tightening force. However, in the conventional packaging method, the tightening force is concentrated only at the corners of the PS plate, so the tightening force must be efficiently applied to the PS plate. There is a drawback that you can not.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent the stacked photosensitive lithographic printing plates from being displaced by efficiently applying a film tightening force to the photosensitive lithographic printing plates. It is an object of the present invention to provide a method for packaging a photosensitive lithographic printing plate capable of performing the above steps.

[0009]

In order to achieve the above-mentioned object, the present invention provides a light-shielding package in which a predetermined number of photosensitive lithographic printing plates stacked on a plate base are packaged in a light-shielding package. Affixed to the plate stand, and arrange the corrugated cardboard on the outer periphery of the light-shielding wrapper and exterior, and provide a reinforcing member at a predetermined position on the outer periphery of the corrugated cardboard, the outer periphery of the cardboard including the reinforcing member,
The photosensitive lithographic printing plate is fastened and fixed by the restoring force of the film by winding a predetermined number of turns of the stretchable film.

According to the present invention, the tightening force generated by the restoring force of the film is generated not only at the corners of the photosensitive lithographic printing plate as in the prior art but also from the reinforcing member provided on the outer periphery of the cardboard. Therefore, in the present invention, by providing the reinforcing member, the tightening force of the film applied to the photosensitive lithographic printing plate can be increased. Therefore, according to the present invention, the film clamping force can be efficiently applied to the photosensitive lithographic printing plates, so that the stacked photosensitive lithographic printing plates can be prevented from being displaced.

[0011] The film to be added to the photosensitive lithographic printing plate can be tightened by restoring force of the stretchable film,
As described in claim 2, a contraction force generated by heat contraction by a heat-shrinkable film may be applied. On the other hand, claim 3
As shown in the figure, a buffer member is arranged on the outer periphery of the photosensitive lithographic printing plate, and in this state, if the photosensitive lithographic printing plate is wrapped in a light-shielding envelope, a force for shifting the photosensitive lithographic printing plate is applied. However, the force is buffered by the buffer member. Therefore, the present invention can reliably prevent the deviation of the photosensitive lithographic printing plate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method for packaging a photosensitive lithographic printing plate according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a laminated PS plate package packaged by the method for packaging a photosensitive lithographic printing plate of the present invention, and FIG. 2 is a transverse sectional view. Hereinafter, a method of packaging the laminated PS plate will be described with reference to FIGS.

As shown in FIGS. 1 and 3, the PS plate 10 is
A large number of sheets are placed on a plate stand 14 installed on a gantry 12 (see FIG. 1). A cardboard 1 serving as a cushioning member is provided on the outer periphery of the stacked PS plates 16.
8, 18,... Are arranged. This cardboard 18, 18
Are provided so as to prevent a step from being generated between the plate base 14 and the laminated PS plate 16 and to buffer the force when the laminated PS plate 16 is applied in the shift direction. In the present embodiment, the cardboard 18 is attached to the outer periphery 4 of the laminated PS plate 16.
Although it is provided on two of the surfaces, it is more effective to provide it on the entire surface. The cushioning member is not limited to the cardboard 18,
Paperboard, molded pulp, paper honeycomb, polyethylene foam, polystyrene foam, urethane foam,
Alternatively, an air cap can be applied.

The laminated PS plate 16 including the outer periphery of the corrugated cardboard 18 is packaged by a kraft paper 20 which is a light-shielding envelope as shown in FIG. After wrapping the laminated PS plate 16, the kraft papers 20 are adhered to each other by the adhesive tape 22 and also adhered to the plate stand 14. The light-shielding envelope is not limited to the kraft paper 20, and various plastic films such as a multilayer of kraft paper and polyethylene (PE) and a multilayer of kraft paper, polyethylene (PE) and aluminum foil can be applied. .

A corrugated cardboard 24 is disposed on the entire outer periphery of the kraft paper 20 as shown in FIG. This corrugated cardboard 24 is an outer corrugated cardboard that also has light-shielding properties.
Double-faced cardboard (JIS standard: K280-SPC125-K280) is used. Reinforced corrugated cardboard (or a material having equivalent performance) 26, 2
6 are arranged. These reinforced cardboards 26, 26 ...
Is a laminate P at a position corresponding to the center of the four sides of the PS plate 10.
The S plate 16 is provided along the thickness direction. The reinforced corrugated cardboard 26 is a reinforcing corrugated cardboard for tightening the laminated PS plate 16 in the lateral direction, and has a strength higher than that of the double-sided corrugated cardboard.
5-SPC280-SPC125-K280) has been used.

On the outer periphery of the corrugated cardboard 24 including the reinforced corrugated cardboards 26, 26 ..., a stretch film 28 having elasticity is provided a plurality of times in the outer peripheral direction of the laminated PS plate 16 as shown in FIG. 8 times). By the stretch film 28, the laminated PS plate 16 is tightened and fixed in the surface direction. As the stretch film 28, a single-layer film such as a low-density polyethylene (LDPE), a linear polyethylene (LLDPE), an ethylene-vinyl acetate copolymer (EVA), or a multilayer film obtained by combining these can be used. It is preferable that its thickness is 15 to 50 μm and that it can be extended by 120 to 200%.

The stretch film 28 has a thickness of 120 to
Wrap with 200% elongation. At this time, due to the restoring force of the stretch film 28 shrinking, the laminated PS plate 1
6 are tightened in the plane direction. Thereby, the laminated PS
The plate 16 is fixed. When a heat-shrinkable film is used instead of the stretch film 28, low-density polyethylene (LDPE), polypropylene (P
P), a single-layer film such as an ethylene-vinyl acetate copolymer (EVA), or a multi-layer film obtained by combining these films can be used. The thickness of the film is preferably 100 to 200 μm.

In FIG. 7, the stretch film 2
The upper surface opening 32 of the laminated PS plate 16 wound in 8 is shielded by the upper lid 30. The upper cover 30 is attached to the stretch film 28 by the kraft adhesive tapes 34, 34.
Fixed to Reference numeral 36 is a dew condensation prevention caution label attached to the upper lid. The laminated PS plate 16 thus packaged
In the package, the tightening force generated by the restoring force of the stretch film 28 (the force of the stretch film 28 contracting as indicated by the arrow A in FIG. 8) is applied to the corners of the laminated PS plate 16 as indicated by the arrow B in the diagram. In addition to the
Is also generated from the reinforced corrugated cardboard 26 provided on the outer periphery of the arrow as shown by the arrow C in the figure.

Therefore, the packaging method according to the present embodiment provides the laminated PS plate 16 by providing the reinforcing cardboard 26.
The tightening force of the stretch film 28 applied to the film can be increased. Therefore, in the present embodiment, the tightening force of the stretch film 28 can be efficiently applied to the laminated PS plate 16, so that the stacked photosensitive lithographic printing plates can be prevented from being displaced.

On the other hand, in the present embodiment, as shown in FIG. 3, the cardboard 18 which is a buffer member is arranged on the outer periphery of the laminated PS plate 16, so that the laminated PS plate 16 is indicated by an arrow D in FIG. Even if a force for shifting as shown is applied, the force is buffered by the cardboard 18. Therefore, the packaging method of the present embodiment can reliably prevent the displacement of the laminated PS plate 16.

[Experimental Example 1] The amount of displacement of the laminated PS plate due to vibration and impact during transportation was confirmed by a tilt impact test (JIS Z0).
205). The shift amount was defined as the shift amount from the edge of the plate base to the edge of the PS plate which was most shifted. Comparative Example: A laminate PS plate was sandwiched between a plate base and a top plate, and a laminate PS plate was fixed in the thickness direction with four bolts (corresponding to the prior art A). At this time, the tightening torque of the nut was set to 50 kgfcm.

The present invention: The stretch film is stretched at a rate of 40%.
And 10 turns were prepared. The experimental result was 10 mm in the comparative example, but 3 mm in the present invention.
Therefore, in the present invention, displacement of the laminated PS plate due to vibration and impact during transportation can be suppressed. [Experimental Example 2] The rate of occurrence of separation failure trouble when applied to an automatic plate making machine was measured using an automatic plate making machine (F) manufactured by Fuji Photo Film Co., Ltd.
NR401).

The experimental results show that the incidence rate of the comparative example was 15% and that of the present invention was 0%. Therefore, in this proposal, PS
The occurrence of plate separation failure can be prevented.

[0024]

As described above, according to the photosensitive lithographic printing plate packaging method of the present invention, a reinforcing member is provided on the outer periphery of the outer corrugated cardboard, and the tightening of the film can be performed by the reinforcing member. I added it to the lithographic printing plate,
The tightening force of the film can be efficiently applied to the photosensitive lithographic printing plates, so that the stacked photosensitive lithographic printing plates can be prevented from shifting.

Further, according to the present invention, since a buffer member is arranged on the outer periphery of the photosensitive lithographic printing plate, and the buffering member absorbs the force of the photosensitive lithographic printing plate to shift, the photosensitive lithographic printing plate is reduced. Deviation can be reliably prevented.

[Brief description of the drawings]

FIG. 1 shows a laminated PS packaged by a packaging method according to the present embodiment.
Longitudinal section of the plate

FIG. 2 shows a laminated PS packaged by the packaging method of the present embodiment.
Cross section of plate

FIG. 3 is an explanatory view in which a corrugated cardboard as a buffer member is arranged on the outer periphery of a laminated PS plate.

FIG. 4 is an explanatory view in which a laminated PS plate is packaged in a light-shielding envelope.

FIG. 5 is an explanatory diagram in which an outer corrugated cardboard and a reinforced corrugated cardboard are provided on the outer periphery of a laminated PS plate packaged with a light-shielding envelope.

FIG. 6 is an explanatory diagram in which the outer periphery of an exterior cardboard including a reinforced cardboard is wound with a stretch film.

FIG. 7 is an explanatory view of attaching an upper lid to a material wound with a stretch film.

FIG. 8 is a schematic view for explaining a tightening force of a stretch film.

FIG. 9 is a schematic diagram for explaining a state in which a force in a displacement direction acts on the laminated PS plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... PS plate 14 ... Plate stand 16 ... Laminated PS plate 18 ... Corrugated cardboard (buffer member) 20 ... Kraft paper (light-shielding wrapping) 24 ... Corrugated cardboard for exterior 26 ... Reinforced corrugated cardboard 30 ... Top lid

Claims (3)

[Claims] 1. An outer periphery of a predetermined number of photosensitive lithographic printing plates stacked on a plate base is wrapped with a light-shielding envelope, and the light-shielding envelope is attached to the plate base. A corrugated cardboard is arranged and packaged, and a reinforcing member is provided at a predetermined position on the outer periphery of the corrugated cardboard. A predetermined number of turns are wound around the corrugated cardboard including the reinforcing member in a state where a stretchable film is extended. A method of packaging a photosensitive lithographic printing plate, wherein the photosensitive lithographic printing plate is tightened and fixed by the restoring force of the film. 2. An outer periphery of a photosensitive lithographic printing plate stacked on a plate base by a predetermined number of sheets is wrapped with a light-shielding envelope, and the light-shielding envelope is attached to the plate stand. A corrugated cardboard is arranged and packaged, a reinforcing member is provided at a predetermined position on the outer periphery of the corrugated cardboard, and the outer periphery of the corrugated cardboard including the reinforcing member is wound a predetermined number of times with a heat-shrinkable film, and the film is wound. A method for packaging a photosensitive lithographic printing plate, wherein the photosensitive lithographic printing plate is tightened and fixed by heat contraction. 3. A plate-shaped buffer member is arranged on the outer periphery of the photosensitive lithographic printing plate stacked on the plate base, and the outer periphery of the photosensitive lithographic printing plate including the buffer member is covered with the light-shielding package. 3. The packaging according to claim 1, wherein the packaging is performed in a package.
A method for packaging the photosensitive lithographic printing plate described in the above.