JPH0373946A - Contveyor for photosensitive printing plate - Google Patents

Abstract

PURPOSE:To obtain a conveyor which is extremely excellent in terms of workability and efficiency and efficiency and substantially prevents flawing at the time of handling by allowing many sheets of photosensitive printing plates to be adhered with each other, interposing these plates between end plates, fastening the end plates to fix photosensitive printing plate group and installing the group on a transportable base in a substantially longitudinal state. CONSTITUTION:The end plates 12 consisting of plywood are placed on both sides of the photosensitive printing plate 1 group. The end plates 12 are fastened by means of bolts 14 and nuts 16 on the circumference thereof where the bolts and nuts are not brought into contact with the printing plates 1. The supporting body and photosensitive resin surfaces of the respective adjacent printing plates are brought into direct contact with each other and are printing plates are installed as an integral assembly onto the base 10. The printing plate 1 group is moved along a floor by casters 18 near to a plate making machine, not shown, after the printing plate group is installed on the base 10 in such a manner. The bolts 14 are thereafter loosened and printing plates are taken out by each sheet and are processed by the plate making machine at the time of the plate making operation. Thus, the conveyor which occupies the smaller floor area, is improved in the transporting and taking out workability and substantially prevents the flawing of the photosensitive resin surfaces is obtd..

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a conveying device for photosensitive printing plates.

[Conventional technology]

Generally, a photosensitive printing plate is one in which a photosensitive resin is formed on a support such as an aluminum plate. This photosensitive printing plate is usually quite large, about 1 m x 1 m, and weighs 500 to 1000 g per sheet, which is quite heavy.

Conventionally, when storing or transporting photosensitive printing plates, an appropriate number of plates were stacked horizontally with interleaf paper interposed therebetween.

However, using a mount to prevent scratches,
Workability is extremely poor when stacking and taking out.

Therefore, in recent years, as shown in FIG. 9, directly photosensitive printing plates i, 1.・・・While horizontally overlapping each other, rigid end plates 2, 2 are arranged on both mating surfaces, and bolts 3,
3. ...They are fastened more tightly into pallets to prevent the photosensitive printing plate from shifting due to vibrations and damaging the photosensitive surface.

In this case, one end plate 2 is used as a pallet stand, and the photosensitive printing plate 1. A corrugated board 4 is provided at least on one side between both surfaces of the group l and the end plates 2, 2 to prevent damage. Furthermore, the number of stacked sheets is usually 700 to 1.
The amount is about 500, and if you are lucky, you can get 1000, for example.
Since each sheet weighs between 500 kg and 1000 kg, a forklift is used.

[Problem to be solved by the invention]

However, when using the above-mentioned end plates and stacking photosensitive printing plates horizontally, the first problem is that during storage,
It requires a large installation area of 1 m x 1 m or more. Second, when a group of 700 to 1,500 printing plates that has been transported near a plate-making machine (image forming machine, exposure machine) is to be actually applied to the plate-making machine, it is necessary to use a After removing the bolts 3, the photosensitive resin surface must be carefully placed on a stand near the plate-making machine, and then each sheet must be taken out and used, resulting in poor work efficiency. and should be handled with care. Moreover, even if there are only about 50 sheets, it is quite heavy, which puts a heavy burden on the worker. Furthermore, in order to take out sheets in units of 50 sheets, for example, it is necessary to insert a corrugated cardboard between each 50 sheets when stacking them in advance, which leads to an increase in cost.

Thirdly, in relation to the second point, a group of 700 to 1,500 sheets must be transported by forklift and then manually transported by workers before being sent to a plate-making machine, making the logistics less smooth. .

Fourth, if the end plates 2, 2 are not fastened sufficiently, the photosensitive resin surface will easily be damaged if a certain printing plate is displaced during transportation or the like. In addition, since the paper is not interleaved, if there is small dust between the printing plates, if the end plates are tightly tightened, the dust will easily damage them. Moreover, even before tightening, the lower printing plate is subject to the load of the upper printing plate.
Easy to get hurt.

Therefore, the main object of the present invention is that when it is installed, it occupies a small planar area, and that it is possible to take out the transported printing plate as it is, which is extremely superior in terms of workability and efficiency, and that it is easy to handle. The objective is to provide a transport device that is almost free from damage.

[Means to solve the problem]

The above problem has been solved by interposing a large number of photosensitive printing plates having a photosensitive resin on a support between end plates in close contact with each other, and by fastening the end plates to form a group of photosensitive printing plates. This can be solved by fixing it and installing it in a substantially vertical position on a portable stand.

[Effect]

In the present invention, the photosensitive printing plates are placed on a stand with a mount interposed between them or directly without a mount.

According to the findings of the present inventors, it takes about 3 hours each to insert the mounts of 1000 photosensitive printing plates and to remove the mounts when taking out the printing plates, for a total of about 6 hours. Therefore, when it is interposed between the end plates without a mount, work efficiency is significantly improved.

In addition, even without a mount, the photosensitive printing plates are installed on the stand vertically, so their lower end surfaces are in contact with the stand due to their own weight, so they are The printing plate hardly shifts and is prevented from being scratched. As a result, even if the end plates are tightened somewhat loosely, the printing plates will not move easily and will not be damaged. Increases the anti-sticking effect.

Furthermore, the group of printing plates is placed on a table in a vertical direction, and although the outer shape of each printing plate is large at about 1 m x 1 m, the thickness is thin at about 2 to 3 mm.
Even if you stack 0 sheets, the total thickness is 200-3000! 1, requiring only a small installation space.

What's more, when a group of printing plates is transported vertically to the plate-making machine, the plate-maker can take them out one by one and put them through the plate-making machine, greatly improving work efficiency from transport to loading them on the plate-making machine. do.

On the other hand, as a portable stand, if the height is higher than the installed thickness and width, it will be unstable and easily fall over, and if it falls over, it will be extremely dangerous due to the weight of the printing plates. Therefore, in addition to the bottom surface for vertical installation, we also provided feet for installation on the sides.
When storing the printing plates before use, by laying the printing plates horizontally with the side legs facing down, the printing plates can be stored safely without the risk of falling over. Then, when using it (such as when applying it to a plate-making machine), if you stand it vertically,
The work of taking out the printing plate from the table and feeding it to the plate making machine can be carried out easily and smoothly.

Furthermore, as shown in the embodiments described below, it is inexpensive if the base and end plates are made of plywood. However, on the other hand,
Plywood is rubbed and fuzz occurs every time a photosensitive printing plate is installed and removed from the plate. This fuzz falls on the photosensitive surface of the photosensitive printing plate and causes scratches on the photosensitive surface. Furthermore, plywood is not strong, and when long bolts are tightened between the end plates, the bolts and nuts tend to deform. Therefore, even if this is prevented by interposing a washer, deformation cannot be completely prevented. Moreover, since plywood lacks rigidity, it is easily deformed within the plane. As a result, the fastening force is unevenly distributed, and the fastening force does not act on the entire surface of the photosensitive printing plate, leading to displacement of the photosensitive printing plate group and the occurrence of defects as a result. On the other hand, when using plywood,
In order to increase the strength, thick plywood must be used, but thick plywood increases the weight.

In contrast, in a preferred embodiment, the base and end plate are made of metal. As a result, the strength and rigidity are increased, there is no deformation of the plate itself, and uniform fastening can be performed without causing displacement or flaws in the group of photosensitive printing plates. Furthermore, there is no problem of fluffing when plywood is used. Moreover, when the end plate is formed of a metal aggregate and a thin plate material that contacts the photosensitive printing plate, the end plate is light in weight and has good transportability. Furthermore, deformation during bolt fastening can be prevented. It also has the advantage of long life (excellent durability).

[Specific structure of the invention]

The present invention will be explained in more detail below.

FIG. 1 shows a first specific example, in which reference numeral 1 denotes a photosensitive printing plate, which is placed vertically on a stand 10 without or with a mount interposed between them. Such a photosensitive printing plate 1.
1... The group has end plates 12, 12 made of plywood on both sides.
are applied, and these end plates 12, 12 are fastened with bolts 14 and nuts 16 around the edges where they do not collide with the printing plate 1, so that the support of each adjacent printing plate and the photosensitive resin surface are brought into direct contact and integrated. It is installed on a stand 10 as a stand.

The platform 10 is preferably portable, ie, fixed to the ground, and particularly preferably movable along the floor by casters 18. Also, bolt 1
It is preferable that the tightening according to No. 4 be made looser than the bolt tightening in conventional horizontal installation in order to prevent damage caused by dust on the interface.

Once the printing plates 1, 1... group are installed on the stand 10 in this way, the casters 18
Along the floor or without casters,
After being moved using a forklift or the like, during plate-making work, the bolts 14, 14, etc. can be loosened to take out each sheet and put it in a plate-making machine.

On the other hand, when taking out one sheet at a time to a plate-making machine, in order to ensure the stability of the printing plates 1, 1, etc., one inclined end plate 12A is used, as in the second specific example of FIGS. 2 to 4. It is preferable to stand them up in an overlapping state. In the examples of FIGS. 2 to 4, the end plate 12A is slanted on the bottom plate 20 and is erected and reinforced by the reinforcing material 22, and the bottom base plate 24 is arranged almost perpendicularly to the end plate 2A with the spacer. It is fixed on the bottom plate 20 via 26. Further, an appropriate number of casters 28 are attached to the bottom plate 20.

Further, after the required number of printing plates 1.1... are placed on the end plate 12A, the end plate 12B is placed on the printing plate l located on the front side, and then the end plate 12A is placed.

12B, a long bolt 30° 30.
. . . to fix the printing plates 1, 1 . . . group.

Furthermore, in order to move these to near the plate making machine, hand handles 3 are provided along with the aforementioned casters 28.
2 is installed. Since this handle 32 may get in the way during storage, it is preferable that the bottle be held against a receiving tube 34 fixed to the bottom plate 20, etc., as shown in FIG.
It is preferable to make it detachable by inserting and removing 6. The attachment/detachment means is not limited to this example.

In the examples of FIGS. 2 to 4, printing plate 1. 1... stack the groups and lean them against the end plate 12A, the end plate 12A,
After fastening between 12B with bolts 30, hold the handle 32 and move to a predetermined position. When taking out the printing plate 1, the bolt 30 is removed, the end plate 12B is removed, and the printing plate 1 can be taken out one by one, making sure the surface is visible. In this case, the printing plate 1 has an angle θ, preferably θ=90 degrees to 60 degrees (
Since it leans against the end plate 12A at an angle of inclination (not including 90 degrees), it does not fall over during removal and is stable. Therefore, there is an advantage that the photosensitive resin surface will not be scratched and damaged during removal.

Note that a plurality of conveying devices shown in FIGS. 2 to 4 may be prepared depending on the size of the target printing plate, or as shown in FIG. The above conveying device may be used in common for small-sized printing plates LA.

Further, when the printing plates 31... are made to lean against the end plate 12A, as shown in FIG. It is convenient to place the side edges of the printing plates 1.1... on them.

On the other hand, as shown in FIG. 2, even during storage, printing plate 1.
1... It is advantageous to stand the group up because it occupies less installation space, but on the other hand, since it is vertically long, the printing plate l tends to fall in the perpendicular direction due to a slight external force. Therefore, as shown in FIG. 2, installation feet, more preferably casters 42, 42, etc. are provided on the side surface, and when the printing plate is stored, it can be used as shown in the third specific example in FIG. 1.1...If the group is laid down horizontally, it will take up less space, but since the height will be lower compared to the base area, it will be possible to avoid the possibility of the group falling over. Furthermore, if the installation feet are casters 42, it can be moved to another location while lying horizontally.

On the other hand, as mentioned in the "effect" section above, the platform IO or 20. When plywood is used for the end plate 12, although it is inexpensive, there are various problems.

Therefore, as in the fourth specific example shown in FIGS. 6 to 8, the end plate 12A112B, the bottom plate 20, the base plate 24 in the second embodiment
, metal end plates 50A and 50B.

It can be a base plate 60 and a base plate 64.

The base 60 is formed into a rectangular plane by appropriately combining angles. A support reinforcing member 62 is erected on the bottom stand 60. This reinforcing member 62 is made of, for example, square steel, and is fixed to the base 60 by welding or the like. In addition, the inclined end plate 50A and the inclined base plate 64 are made of an aggregate 51 made of square steel and a photosensitive printing plate l.
A surface plate 52 made of a thin stainless steel plate or the like is fixed in advance to the surface that is in contact with the surface, and the two are integrated by welding or the like. 62 is a spacer made of a steel plate.

More specifically, the above-mentioned inclined end plate 50A is constructed by constructing a frame of rectangular steel in a lattice shape by welding or the like, and to which the surface plate 52 is fixed. The base plate 64 is similarly formed from an aggregate 64a and a surface plate 52.

Furthermore, regarding the other end plate 50B, an aggregate 51 made of square steel and a surface plate 5 made of plastic such as vinyl chloride.
Consisting of 2a. The reason why this surface plate is made of a plastic plate is to further reduce the weight of the end plate 50B since it is frequently attached and detached.

On the other hand, in this fourth specific example, when fastening with the bolts 30, the long bolts 30 are inserted into bolt insertion holes 50a formed in the end plates 50A and 50B, and fixed with nuts.

50b is a washer.

According to the fourth specific example, the problems described in the above-mentioned "effect" section can be solved, such as improving the strength of the base portion and the end plate portion.

As a modification of the fourth specific example, it is possible to use a metal material of other shape such as an angle for the aggregate, to use something other than steel as the metal material, to weld the aggregates together (using appropriate hardware, etc.). It is possible to change the framework structure or shape of the aggregate, omit the surface plate, etc.

In the present invention, when 100 or more printing plates, more preferably 300 or more printing plates are provided on the table of the conveying device,
Especially the advantages are great.

Generally, photosensitive printing plates are produced by coating a photosensitive composition on a support such as an aluminum plate, irradiating it with active light such as ultraviolet rays through a negative image, polymerizing or crosslinking the irradiated areas, and applying a developer. Insolubilize and elute the non-irradiated areas into a developer, making each area an image area that repels water and accepts oil-based ink, and a non-image area that accepts water and repels oil-based ink. It is obtained by

In this case, the photosensitive composition is particularly negative-type P
For S plates, diazo resins such as condensates of P-diazodiphenylamine and formaldehyde are widely used.

However, this diazo resin is not used alone, but is usually used in combination with at least a binder resin.

Furthermore, as the photosensitive resin, quinodiazide resin is typically used in positive PS plates.

As the binder resin, polymers having phenolic OH groups and carboxyl groups, such as novolac resins, polyparahydroxystyrene, and styrene/maleic anhydride copolymers, are mainly used.

In addition, photopolymerizable, photocrosslinkable photosensitive compositions, etc. can also be used.

In any case, a printing plate in which the photosensitive resin as described above is provided on a support, such as an aluminum plate, is manufactured by processes such as degreasing of the support, graining, electrolytic polishing, anodizing, washing, drying, When a series of steps such as photosensitive liquid application, cutting, and surface inspection are completed, it is placed vertically on the portable table shown in each of the above-mentioned examples without a mount or with an interleaving paper interposed.

〔Example〕

Next, examples will be shown.

(Example 1) In a conveying device in which photosensitive printing plates are placed on a table in direct contact with each other without intervening a mount between them, conventional horizontal transportation and vertical transportation of the present invention are performed. In the case of using the apparatus, the number of sheets with defects was examined for each of the following photosensitive planographic printing plates (■) and (■). The survey conditions are as follows.

*Dimensions and number of sheets: 1003x800x0.24 (related) x 1000 sheets*
Bolt tightening force 100kgf-an dimensions of this pallet
1200 x 1100Onu*Number of volts 8
Book * Type ■: Photosensitive lithographic printing plate coated with a photosensitive composition containing a novolac resin and a naphthoquinonediazide compound ■A photosensitive lithographic printing plate coated with a photosensitive composition containing a diazole resin and an acrylic copolymer The number of scratches in 1000 photosensitive planographic printing plates is as shown in Table 1.

Table 1 shows that the vertical transport device of the present invention has a reduction of more than 50% compared to the conventional horizontal transport device.

(Example 2) In the case where a mount was interposed between the photosensitive printing plates,
The same investigation as in Example 1 was conducted.

As a result, no flaws were observed in either case because vertical and horizontal interleaf sheets were interposed.

Conventionally, in the case of horizontal placement, it is necessary to first place each 20 to 30 rough printing plates from a pallet on a stand called a horse back, remove the mount in this state, and transport the photosensitive printing plates to the plate-making process. In contrast, in the present invention, it is installed vertically. Therefore, work efficiency is improved. So 1000
When we investigated the workability of 9 sheets per sheet, we found that when placed horizontally,
While it took about 90 minutes and two people to carry out the unpacking and transfer, in the case of the present invention, the unpacking and transfer can be carried out directly, so one person only needs 30 minutes. I didn't. In both cases, the time taken to remove the mount is omitted.

〔Effect of the invention〕

As described above, according to the present invention, the installation area is reduced,
This provides advantages such as improved transport and removal workability, and almost no damage to the photosensitive resin surface.

[Brief explanation of drawings]

FIG. 1 is a front view of the first specific example of the present invention, FIG. 2 is a front view of the first specific example of the present invention, FIG. 2 is a perspective view of the second specific example, FIG. The figure is a perspective view of the main part shown in different viewing directions.
The figure is a front view of the third specific example in a horizontally installed state, FIG. 6 is a front view of the fourth specific example, FIG. 7 is a side view thereof, FIG. 8 is a perspective view of the other end plate, and FIG. 9 is a conventional FIG. 3 is a perspective view of an example. l...Photosensitive printing plate, 10 units, 12.12A. 12B... End plate, 14... Bolt, 24... Bottom plate, 28... Caster 30... Bolt, 32...
... Handle, 50A, 50B... End plate, 51... Aggregate, 52.52a... Surface plate, 60... Bottom stand, 64.
... Base plate, 64a... aggregate.

Claims (6)

[Claims] (1) A large number of photosensitive printing plates having a photosensitive resin on a support are placed in close contact with each other and interposed between the end plates, and the end plates are sandwiched between them to form a group of photosensitive printing plates. 1. A photosensitive printing plate conveying device, characterized in that the photosensitive printing plate is fixed and placed on a table in a substantially vertical state. (2) The apparatus according to claim 1, wherein the photosensitive printing plates are directly interposed between the end plates without interleaving paper. (3) The stand has feet for installation on the floor on a lower surface for holding the printing plate group in a vertical position and on a side surface for holding the printing plate group in a substantially horizontal state. 2. The device of claim 1. 4. The apparatus of claim 1, wherein one of the end plates is fixed to a base, and the one end plate and the base are made of metal. (5) The apparatus according to claim 4, wherein the one end plate is a two-dimensional frame made of metal aggregate, and a plate material is integrally provided on the photosensitive printing plate side. (6) The device according to claim 5, wherein the plate material is made of metal or plastic.