JPH04129961A - Multistep type receiving bed for lithographic printing plate with no necessity of water for moistening - Google Patents

Abstract

PURPOSE:To prevent generation of a flaw-shaped stain at printing time so as to improve work efficiency by introducing a non-moist water-required lithographic printing plate, processed in each storage step of a multistep receiving bed having the two or more storage steps, in a proportion of one step per a single storage step. CONSTITUTION:A non-moist water-required lithographic printing plate is conveyed by a roller 2 of an automatic developing machine A to a developing part, here to drop liquid developer sprayed from a developing shower 3, rubbed and developed by a developing brush 4 to remove a silicon rubber layer. Next, the printing plate is conveyed to a water washing part and washed by spraying water from a washing water shower 5. Further, the plate is conveyed to a dyeing part and dyed by dyeing liquid dropped sprayed by a dyeing shower 6. The plate material thus obtained processed very easily flaws the silicon rubber layer, so that the material is stored in a multistep receiving bed B in a proportion of one plate per a single storage step. The multistep receiving bed B is fixed to a strut 9 in which five storage steps 81, 82, 83, 84, 85 are vertically provided on a base 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a holder for a lithographic printing plate that does not require dampening water, and more specifically to a holder for a lithographic printing plate that does not require dampening water and which is introduced one plate at a time into each storage stage. The present invention relates to a mounting method and a holder for a photosensitive lithographic printing plate that does not require dampening water.

[Background of the Invention] Conventionally, a photosensitive lithographic printing plate that does not require dampening water (hereinafter referred to as plate material j) has been prepared by forming a primer layer on a support,
It is known that a photosensitive layer and an ink repellent layer are sequentially applied. By exposing and developing this plate material, a lithographic printing plate that does not require dampening water (hereinafter referred to as a "printing plate" or "printing plate" as necessary) is created.
) can be obtained.

For example, in the case of a positive-type planographic printing plate that does not require dampening water, the ink-repellent layer in exposed areas is not removed by development and remains as a non-image area, or the ink-repellent layer in unexposed areas is removed by development. When removed, the ink-receptive photosensitive layer or primer layer is exposed to form an image area, thereby forming a lithographic printing plate that does not require dampening water.

Conventionally, silicone rubber has been used as an ink repellent layer provided on the upper layer of such a lithographic printing plate that does not require dampening water.

The photosensitive lithographic printing plate coated with this silicone rubber layer, which does not require dampening water, is developed with an automatic developing machine, dyed, and used as a printing plate, but the printing plate obtained in this way is Since overlapping the plates would cause scratches on the silicone rubber layer, the printing plates processed in an automatic developing machine were received by the operator one by one and placed on the plates without overlapping them. This has caused problems with poor work efficiency.

Furthermore, Japanese Patent Application Laid-open No. 64-78258 discloses that in order to prevent scratches, it is possible to stack the printing plates by interposing a mount between the printing plates that have been processed by an automatic developing machine and transported out. Furthermore, a plate holder for an automatic developing machine that can automatically transfer printing plates is described.

However, this plate holder for an automatic developing machine is undesirable because it increases the size of the device and the mounting paper is expensive.

As a result of various studies regarding these problems, the inventors of the present invention have developed a method for preventing scratches on the printing plates and loading them efficiently by introducing the printing plates one by one into the storage tray without stacking them. The inventors have discovered that it is possible to place the device in place, and have completed the present invention.

[Object of the Invention] Therefore, an object of the present invention is to be able to place a large number of printing plates processed in an automatic processor without damaging the silicone rubber layer, and thus to prevent scratch-like stains during printing. An object of the present invention is to provide a method for mounting a lithographic printing plate that does not require dampening water, which can prevent the occurrence of dampening, and which improves work efficiency, and a holder for the printing plate.

[Structure of the Invention] The above-mentioned objects of the present invention are as follows: 1) A multistage pedestal having two or more storage stages has one storage stage containing a dampening water-free lithographic printing plate processed by an automatic developing machine in each storage stage. A method for placing a lithographic printing plate that does not require dampening water, characterized by introducing dampening water into the plate at a rate of one plate.

2) A pedestal for receiving a dampening water-free lithographic printing plate processed by an automatic processor, the pedestal consisting of a multi-tiered pedestal having two or more storage tiers for storing one plate per plate, and A multi-stage holder for lithographic printing plates that does not require dampening water and has a means for introducing one plate into each storage stage.

3) A multistage pedestal for a lithographic printing plate that does not require dampening water, characterized in that the introduction means for the printing plate or the conveyance path switching guide plate according to claim 1 or 2 is used.

4) This is achieved by a multistage pedestal for a lithographic printing plate that does not require dampening water, wherein the printing plate introducing means according to claim 1 or 2 comprises a mechanism for raising and lowering the pedestal.

The present invention will be explained in more detail below.

The present invention scratches the silicone rubber layer existing on the surface of the printing plate by introducing printing plates into each storage stage of a multi-stage pedestal at a ratio of one plate to each storage stage without stacking the printing plates. The effect is that it can be handled efficiently without any problems.

In addition, by using a transport path switching guide plate or a means having a mechanism for raising and lowering the multistage pedestal as a means for introducing the printing plates into the multistage pedestal, printing plates can be printed at a rate of one plate per storage stage without stacking printing plates. This has the excellent effect of being able to introduce different versions.

The interval between each stage in the multi-stage pedestal of the present invention is 3 mm to 5 mm.
0 mm, preferably 7 mm to 20 mm.

Further, the number of stages in the multi-stage pedestal of the present invention is at least 2.
Any number of stages is sufficient, but from a practical standpoint, 5 to 50 stages is preferred. However, the upper limit number of stages is not particularly limited.

It is preferable that the surface of each stage in the multi-stage pedestal of the present invention be coated with a lubricant to improve slipperiness, or that a member having slipperiness be attached thereto, or that a guide rail be provided. An example of the slippery member is tape.

Furthermore, it goes without saying that these members may be provided on the surface of the conveyance path switching plate.

In the multi-stage pedestal of the present invention, in order to facilitate the removal of stored printing plates, the connection between each storage stage and the support is as follows.
For example, it is preferable to use a hinge or the like. In addition, it is preferable that each stage has a rail or the like that can be pulled out to the site, as this makes it easier to take out the printing plate.

The automatic developing machine used in the present invention is normally used for developing lithographic printing plates that do not require dampening water, and has a developing section, a first washing section, a dyeing section, and a second washing section.

[Operations and Effects of Wooden Invention] In the present invention, the pedestal for the planographic printing plate that does not require dampening water is configured in multiple stages, and a printing plate is introduced into each stage, so that the printing plates do not overlap. Therefore, it is possible to prevent scratches on the plate surface caused by overlapping printing plates.
Furthermore, since there is no need to use human hands, work efficiency is improved.

Also, as a means of introducing printing plates into each stage of a multi-stage pedestal,
Since the transport path switching guide plate and the lift mechanism for the pedestal are used, the work can be carried out automatically without using human hands.

[Examples] Next, the present invention will be explained using examples with reference to the drawings, but the invention is not limited to these examples.

Embodiment 1 FIG. 1 is a schematic cross-sectional view of a multistage pedestal B set in an automatic developing machine A. A lithographic printing plate that does not require dampening water is transported to the developing section by rollers 2 to the automatic developing machine. There, a developer is applied from the developer shower 3 and developed by rubbing with the developer brush 4, and the silicone rubber layer is removed. Next, the printing plate is conveyed to a washing section and is washed with water sprayed from the washing shower 5.

Further, it is transported to a dyeing section and dyed with a dyeing solution applied by a dyeing shower 6.

Since the silicone rubber layer of the plate material obtained by such treatment is very easily scratched, it is stored in a multi-stage pedestal B at a ratio of one plate per storage stage.

Multi-stage pedestal B has 5 storage stages 81.82.83.84
．． 85 was fixed to a support 9 erected on a stand 10, with an interval of 3 cm. Although the case of five storage stages is shown, the number is not particularly limited.

Furthermore, a conveyance path switching guide plate 7 for introducing into each storage stage 81...85 is provided. This guide plate 7 is sequentially and intermittently moved downward by a cam or the like. In this case, it is preferable that the tip of each storage stage be installed toward the rotation axis direction of the transport path switching guide plate 7 so that the storage stage and the transport path switching guide plate 7 can be maintained horizontally.

In addition, in the present invention, in order to introduce one processed plate into each storage stage, the moving plate is electrically detected, and this detection signal automatically moves the conveyance path switching guide plate to one plate. It is preferable to operate so as to move step by step.

The plate detection sensor can be installed in the insertion section or pedestal of the automatic processor.

In the present invention, printing plates introduced into each storage stage of the multi-stage pedestal can be taken out by lifting the storage stage upward via a hinge.

Embodiment 2 FIG. 2 is a schematic cross-sectional view showing another embodiment of the present invention, that is, another example of the multi-stage pedestal B set in the automatic developing machine A.

A printing plate obtained in the same manner as in Example 1 is introduced into a multistage pedestal B provided at the rear of an automatic processor.

This multi-tiered pedestal B has storage tiers 81...86 each fixed to a support 10 erected on a pedestal 11 in parallel and inclined, and the pedestal can be moved up and down as shown by the arrows. An elevating mechanism C is provided for movement.

This elevating mechanism C is called the Pandagraph method. A nut 13 is installed at the end of the arm 16,
The ohm gear 12 is engaged with this, and the motor 9
When the worm gear 12 rotates, the table 11 moves upward, the storage stage is placed at a desired position, and printing plates developed and dyed with an automatic processor are introduced at a rate of one plate per storage stage.

In this case, it is preferable to provide a plate detection sensor at the insertion part of the automatic developing machine, the entrance of the pedestal, etc., and to raise and lower the pedestal based on this signal.

As the elevating mechanism C used in the present invention, those shown in FIGS. 3 and 4 can also be used.

In the Y-lowering mechanism C shown in FIG. 3, two arms 16 are installed on a base 11 so as to intersect with each other, and the other end is connected to a gear 12 via a nut 13.

When the motor 9 is rotated, the nut 13 moves eight times to the left, and the stand 11 moves eight times upwards accordingly.

Moreover, FIG. 4 shows another configuration of the elevating mechanism C.
In a so-called jack system, nuts 13 and 14 are installed on both sides of a parallelogram frame 15, a worm gear 12 is engaged with these nuts, and when the worm gear 12 is rotated by the motor 9, the table 11 moves upward.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view, not showing the state in which the multistage pedestal of the present invention is set in an automatic developing machine. Figure 2 shows how the multistage pedestal of the present invention is installed in an automatic developing machine.
FIG. 6 is another schematic cross-sectional view showing a state shown in FIG. FIG. 3 is a side view showing the elevating mechanism of the multistage cradle of the present invention. FIG. 4 is another sectional view showing the elevating mechanism of the multistage pedestal according to the present invention. Explanation of symbols 1...Printing plate or its conveyance path 2...Roller 3...Developing shower 4...Developing brush 5...Washing shower 6...Dyeing shower 7...
・Guide plate 81.82.83.84.85.86・・Storage stage 9・・
Motor 10... Support 11... Stand 12... Worm gear 13.14.
・Natsuto 15・・Frame 16・・Arm A・・Automatic developing machine B・・Massacre type pedestal C・・Lifting mechanism

Claims (1)

[Scope of Claims] 1) In each storage stage of a multi-stage pedestal having two or more storage stages, a lithographic printing plate that does not require dampening water and has been processed with an automatic developing machine is placed at a ratio of one plate per storage stage. 1. A method for placing a lithographic printing plate that does not require dampening water. 2) A pedestal for receiving a dampening water-free lithographic printing plate processed by an automatic processor, the pedestal consisting of a multi-tiered pedestal having two or more storage tiers for storing one plate per plate, and A multi-stage holder for lithographic printing plates that does not require dampening water and has a means for introducing one plate into each storage stage. 3) A multistage holder for a planographic printing plate that does not require dampening water, wherein the printing plate introduction means according to claim 1 or 2 is a conveyance path switching guide plate. 4) A multistage pedestal for a lithographic printing plate that does not require dampening water, characterized in that the printing plate introducing means according to claim 1 or 2 comprises a mechanism for raising and lowering the pedestal.