JP2003094614A - Plate making type printing equipment, multi-color printing equipment and its plate making method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a highly accurate plate making operation, even if a plate cylinder which forms a plate surface is shifted from the plate making device in a registration/paper thickness adjustment, concerning a plate making type printing equipment in which a printing equipment which effects printing on a medium by supplying ink on the plate surface is provided with the plate making device. SOLUTION: In the printing equipment provided with a plate cylinder (11), blanket cylinder (20), a plate making device (19) and a registration/paper thickness adjustment mechanisms (41 to 44), a target (11-1) provided to the plate cylinder (11) is detected by a sensor (167) of a writing device (16) and the zero point of an encoder (165) is corrected, even if the plate cylinder position is shifted from the writing device (11-1). Then, in making the plate, the plate cylinder (11) is returned to the original position by operating the adjustment mechanisms (41 to 44). Thus, in making the plate, the relative position relation between the plate cylinder and the writing device can be maintained evenly and highly accurately. Furthermore, when the method is applied to the multi-color printing equipment interconnected to a plurality of the plate making type printing equipment, the multi-color printing equipment has only to be equipped with one encoder, cost can be reduced and a design flexibility can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-making printer, a multicolor printer and a plate-making method for making a plate on a printing machine, and more particularly to a plate-making mold for writing an image on a plate cylinder to make a plate surface. The present invention relates to a printing machine, a multicolor printing machine, and a plate-making printing method. More specifically, even when the position of the plate cylinder for printing is adjusted, the phase and position of the writing device and the plate cylinder are set appropriately. Regarding

[0002]

2. Description of the Related Art In an offset printing machine, a PS plate made on a plate cylinder is mounted, dampening water and ink are supplied to the plate cylinder, and an image on the PS plate is repelled by the dampening water and ink. It was transferred to and printed on paper. However, in this method, in order to change the print content, it is necessary to create a printing plate (PS plate) with a separately provided plate making machine and replace the plate cylinder or PS plate of the printing machine.

In order to omit this exchanging work, a plate making method on the printing machine has been proposed for making a plate on the printing machine. For example, in Japanese Patent Application Laid-Open No. 1-152459, a plate cylinder is coated with a photosensitive resin, the photosensitive resin is exposed and developed to form a printing plate (plate surface) on the plate cylinder. It has been proposed to supply water and ink, transfer the image on the printing plate by the repulsive action of the dampening water and ink to a blanket cylinder, and print on paper. In this method, in order to regenerate the plate, the above-mentioned printing plate is prepared by dissolving and removing the photosensitive resin forming the above-mentioned printing plate.

[0004]

To expose the plate cylinder,
It is necessary to write an image from a writing device on the rotating plate cylinder. A writing head is used for this writing. If the position of the writing head with respect to the plate cylinder is accurate, writing can be performed with high accuracy and a plate surface on which a high-resolution image is written can be formed.

However, the offset printing machine is provided with a mechanism for adjusting the position of the plate cylinder during printing in order to adjust the paper thickness and the printing position on the paper. When this adjustment is performed, the phase and the positional relationship between the writing head and the plate cylinder are deviated, which causes a problem that it is difficult to create a highly accurate plate surface during plate making.

Therefore, an object of the present invention is to provide a plate-making type printing machine for appropriately setting the relative positional relationship between the plate cylinder and the writing device during plate making, even if the position of the plate cylinder is adjusted during printing.
A multicolor printing machine and a plate-making type printing method are provided.

Another object of the present invention is to provide a plate-making printer, which is capable of appropriately setting the writing phase of the writing head with respect to the plate cylinder during plate making even if the phase of the plate cylinder is adjusted during printing. It is to provide a color printing machine and a plate-making type printing method.

Still another object of the present invention is to provide a plate making type printing machine for appropriately setting the relative positional relationship of the writing head with respect to the plate cylinder at the time of plate making, even if the position of the plate cylinder is adjusted at the time of printing. A multicolor printing machine and a plate-making type printing method are provided.

Yet another object and advantage of the present invention are:
It will be apparent from the following description.

[0010]

[Means for Solving the Problems] To achieve this purpose,
A plate-making printing machine of the present invention is a printing machine that supplies at least ink to a plate surface and prints on a medium, wherein the plate surface is formed and a plate cylinder that rotates, and at least the ink is supplied to the plate cylinder. A supply device, a blanket cylinder to which the image of the plate surface of the plate cylinder is transferred, and prints the medium with the transferred image, and the positions of the plate cylinder and the blanket cylinder are determined according to the thickness of the medium and the printing position. An adjusting mechanism for adjusting, a writing device for writing an image to be printed on the plate cylinder, a plate making device for forming the plate surface, a target provided on the plate cylinder, and detection for detecting the target. A plate cylinder drive for controlling a writing operation of the writing device with respect to the rotating plate cylinder according to an output of a mechanism and a drive system for driving the plate cylinder, and the plate cylinder drive according to an output of the detection mechanism. And a control device for correcting a zero point for the encoder of the plate cylinder phase.

Further, in the plate-making printing method of the present invention, a plate making process for making a plate surface on the plate cylinder by a writing device for writing an image to be printed on the plate cylinder, and at least ink on the plate surface of the plate cylinder. A plate making type printing method comprising a printing step of supplying and printing on a medium through a blanket cylinder,
An adjusting step of adjusting the positions of the plate cylinder and the blanket cylinder in accordance with the thickness of the medium and the printing position, and a target provided on the plate cylinder is detected by a sensor to drive the plate cylinder. Zero-correcting the plate cylinder phase of the drive system encoder and controlling the writing operation of the writing device on the rotating plate cylinder.

According to the present invention, the position of the plate cylinder is adjusted by the adjusting mechanism.
Even if it shifts from the writing device, the target provided on the plate cylinder
Since the sensor of the writing device detects and corrects the zero point of the encoder, the writing start position can be kept uniform and highly accurate.

Further, by applying to a multi-color printing machine in which a plurality of plate-making printing machines are connected, it is sufficient to provide one encoder in the multi-color printing machine, so that cost reduction and flexibility in designing are improved. .

Further, the printing machine of the present invention is a printing machine which supplies at least ink to a plate surface and prints on a medium, wherein the plate surface is formed and rotates, and at least the ink on the plate cylinder. A supply device for supplying a blanket cylinder for transferring the image on the plate surface of the plate cylinder and printing the medium with the transferred image, the positions of the plate cylinder and the blanket cylinder, the thickness of the medium, and the printing Depending on the position, an adjusting mechanism for adjusting, and the plate cylinder, having a writing device for writing an image to be printed, has a plate making device for creating the plate surface, in the plate making process by the plate making device, the At least the plate cylinder is returned to the writing origin position of the writing device by an adjusting mechanism.

Further, in the plate-making printing method of the present invention, a plate making process for making a plate surface on the plate cylinder by a writing device for writing an image to be printed on the plate cylinder, and at least ink on the plate surface of the plate cylinder. A plate-making printing method comprising a printing step of supplying and printing on a medium through a blanket cylinder, wherein the positions of the plate cylinder and the blanket cylinder are adjusted according to the thickness of the medium and the printing position. And a step of returning at least the plate cylinder to the writing origin position of the writing device from the position adjusted in the adjusting step in the plate making step.

According to the present invention, the adjusting mechanism operates the adjusting mechanism to return the plate cylinder to the original position even if the plate cylinder position deviates from the writing device. The relative positional relationship can be kept uniform and highly accurate.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to a plate-making printer, operations of the plate-making printer, a register / paper thickness adjusting mechanism, a writing operation guarantee mechanism at the time of plate making, and other embodiments. Described in order. In each figure, the same parts are designated by the same reference numerals. It should be noted that these drawings and description are for exemplifying the present invention and do not limit the scope of the present invention. It goes without saying that other embodiments may belong to the scope of the present invention as long as they match the gist of the present invention.

[Plate-making printer] FIG. 1 is a block diagram of an embodiment of the plate-making printer of the present invention, FIG. 2 is a detailed configuration diagram of the plate-making printer of FIG. 1, and FIG. It is explanatory drawing of the plate reproduction process of the plate-making type printing machine of No. 1.

FIG. 1 shows, as a plate-making type printing machine, a plate-making type printing machine for reproducing a plate. Before explaining this configuration, FIG.
The on-press plate making method (plate reproducing method) applied to this printing machine will be described. This on-press plate making method is shown in FIG.
As shown in FIGS. 3A to 3E, the “drawing material coating / drying step” (FIG. 3A) and the “image writing step” (FIG. 3)
(B)), "Developing process" (Fig. 3C), "Printing process"
(Fig. 3 (D)) and "cleaning / regeneration process" (Fig. 3 (E))
Consists of.

As shown in FIG. 3 (A), a printing plate (plate) P has a substrate 1 and a surface of the substrate 1 (plate surface, plate surface).
And a drawing material (photosensitive layer, for example, photosensitive plate layer) 2 formed on the substrate. In the specification of the present application, the plate surface or plate surface may be composed of various elements such as only the surface of the substrate 1 and the drawing material (photosensitive plate agent layer) 2 as will be apparent from the following description. The specific configuration should be determined depending on the case. Similarly,
When the term “plate” is used, it may include the photosensitive plate agent layer 2 as well.
Since it may not be included, the specific configuration should be determined depending on the case.

The substrate 1 is composed of a grained metal such as aluminum or stainless steel, or a polymer film. However, the material of the substrate 1 is not limited to these metals such as aluminum and stainless steel or polymer films. On the surface of the base material 1, an intermediate layer (not shown) (hydrophilization layer described later) is formed. For the intermediate layer, for example, a silicone compound such as silica (SiO2), silicone resin, or silicone rubber is used as the material. This intermediate layer is formed in order to impart hydrophilicity to the base material 1, to secure the adhesion to the photosensitive plate layer 2 described later, and to improve the adhesiveness. is there.

As the photosensitive plate agent layer 2, various photopolymerizable compositions can be used, and for example, one or multiple layers of the hydrophobic photosensitive resin disclosed in JP-A-1-152459 can be applied. In particular, the following photopolymerizable composition is a suitable example.

(1) A photopolymerizable composition containing an ethylenic monomer and a photopolymerization initiation system, wherein as an ethylenic monomer, 4 or more urethane bonds and 4 or more urethane bonds are contained in one molecule.
Photopolymerizable composition containing urethane compound having two or more addition-polymerizable double bonds (Japanese Patent Application No. 2001-016
536).

(2) Containing an ethylenic compound, a cyanine sensitizing dye cation and / or a phthalocyanine sensitizing dye having a structure in which a plurality of rings are bonded via a polymethylene chain, an organic boron anion and / or a halomethyl group-containing compound. , A photopolymerizable composition for near infrared laser exposure of 800 to 1300 nm (Japanese Patent Application No. 2000-362422).

(3) A photopolymerizable composition containing an ethylenically unsaturated compound and a photopolymerization initiation system, wherein the photopolymerization initiation system is a hexaarylbiimidazole compound or a titanocene compound and a dialkylaminobenzene system. A photopolymerizable composition for 400-420 nm blue-violet laser exposure, which is a compound (Japanese Patent Application No. 2000-364310).

First, as shown in FIG. 3 (A), the base material 1 is coated with a drawing material liquid (polymer liquid) in which a photosensitive plate agent is dissolved or dispersed in a solution, and dried to form the base material 1 on the base material 1. Then, the photosensitive plate agent layer 2 is formed.

Next, as shown in FIG. 3B, an image is written on the photosensitive plate material layer 2 with a laser or the like. Furthermore, FIG.
As shown in (C), the photosensitive plate agent layer 2 is developed with a developing solution. Thereby, the light irradiation section 2-1 of the photosensitive plate layer 2 is formed.
Dissolves and the hydrophilic surface of the substrate 1 is exposed. In the non-light irradiation part 2-2, the photosensitive plate agent layer 2 remains and remains hydrophobic.

Here, the hydrophilic surface has a contact angle of water of 1
A surface of 0 ° or less, and a hydrophobic surface is a hydrophobic portion having a contact angle of water of 50 ° or more, preferably 80 ° or more. A hydrophobic ink for printing easily adheres to the surface, while a wet surface is wet. Adhesion of water is difficult.

After the above processing is completed, FIG.
As shown in, the surface of the photosensitive plate layer 2 is coated with the hydrophobic ink 3 for printing and the fountain solution 4 in a mixed state. Then, the hydrophobic ink 3 adheres to the hydrophobic portion 2-2 of the photosensitive plate layer 2, and the dampening water 4 preferentially adheres to the remaining hydrophilic portion 2-1, while the hydrophobic ink 3 The ink 3 is repelled and does not adhere. By forming an image in this way, the surface of the photosensitive plate material layer 2 has a function as a printing plate. After that, the normal printing process is executed and the process is terminated. That is, it is transferred to a blanket cylinder, transferred to paper, and printed.

Next, a method of reproducing the printing plate P will be described. As shown in FIG. 3 (E), first, as an ink removing step, ink, dampening water, paper dust, etc. attached to the surface of the photosensitive plate layer 2 after printing is wiped off. Next, a stripping solution is supplied, the photosensitive plate agent layer 2 is decomposed and removed, and washed with a plate cleaner solution. As a result, the photosensitive plate agent layer 2 is peeled off from the substrate 1. This ends the reproduction.

Next, an embodiment of the plate-making type printing machine of the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, a printing machine 10 includes a plate cylinder 11 around which a printing plate body (plate surface) P is wound, a dampening water supplier 18 for supplying dampening water 4 to the plate cylinder 11, and a plate cylinder. Ink roller 17 for supplying hydrophobic ink 3 to 11, and blanket cylinder (blanket cylinder) 20 onto which the ink image of plate cylinder 11 is transferred
And a pressure cylinder 21 that conveys the paper 22 with the blanket cylinder 20 interposed therebetween.

With this structure, the ink 3 and the dampening water 4 are supplied to the printing plate P wrapped around the rotating plate cylinder 11 to form an ink image, which is transferred to the rotating blanket cylinder 20. The paper 22 that has been sandwiched between the impression cylinders 21
Is transferred to and printing is performed.

In the on-press plate making apparatus, a plate reproduction module (plate making apparatus) 19 is provided around the plate cylinder 11. The plate reproduction module 19 can be moved in the direction of arrow A in the figure, and can be retracted from the plate cylinder 11 when the plate is replaced or when the printing press and the plate reproduction module are maintained.

The plate reproduction module 19 includes a drawing material (polymer) coating device 14, an aqueous solution coating device (plate surface processing device) 13 that also serves as a developing device and a peeling device, a plate surface cleaning device 15, and an image writing device 16. Non-contact temperature sensor 36
It has and. A drying device 12 is provided on the plate reproduction module 19 with the plate cylinder 11 interposed therebetween.

This drawing material (polymer) coating device 14,
The aqueous solution coating device 13, the plate cleaning device 15, and the image writing device 16 are provided with actuators 30, 31, 3 respectively.
2, 33 are provided so that the plate cylinder 11 can be approached and retracted. These actuators 30 to 33 are, for example, air cylinders, and are controlled by the control unit 35.

The printing plate P is wound around the plate cylinder 11 and installed. The plate cleaning (cleaning) device 15 is
It is equipped with a gumming device to remove ink, dampening water, paper dust, etc. on the plate surface after printing. The aqueous solution coating device 13 applies a developing solution to the plate surface of the plate body P to develop the photosensitive plate agent layer 2 of the plate body P, and a peeling solution to the plate surface of the plate body P to form a photosensitive layer. It has a peeling function of decomposing and removing the plate layer 2.

The drawing material applying device 14 is for applying a photosensitive plate liquid (called a polymer) for forming the photosensitive plate layer 2 to the substrate 1 of the plate P. The drying device 12 is for drying the printing plate P, and it dries the photosensitive printing plate solution applied on the substrate 1 to remove the organic solvent and the like, thereby easily forming the photosensitive printing plate layer 2. To form. The image area writing device 16 irradiates the surface of the photosensitive plate agent layer 2 of the plate P with light (infrared rays or the like) to form an image area. For example, it is composed of a laser exposure device.

The arrangement of these devices will be described. The drawing material applying device 14 is provided at a position as high as possible on the plate cylinder 11. That is, it is provided on the upstream side in the rotation direction of the plate cylinder 11.
Since the hydrophobizing agent, that is, the polymer, forms the photosensitive plate agent layer 2 which influences the performance of the plate, it is necessary to avoid the inclusion of impurities most, and the most accurate coating is necessary. Since only the photosensitive plate layer 2 is formed, the amount of solvent used is small, and liquid leakage and scattering are small. Therefore, the cleaning device 1
5. It is arranged above the aqueous solution coating device 13.

Next, the aqueous solution coating device 13 uses a large amount of the aqueous solution because it uses the plate surface treatment liquid for development and peeling. Therefore, the amount of liquid leakage and the amount of splattering are relatively large. In order to prevent the influence on other devices due to this, it is provided at a position as low as possible of the plate cylinder 11, that is, at the most downstream side in the rotation direction of the plate cylinder 11.

The image area writing device 16 avoids the contamination of the optical system by the processing liquid and the adverse effects on the precision electrical parts.
It is provided above the cleaning device 15 and the aqueous solution coating device 13.
Further, by making the plate horizontal to the plate surface, the processing accuracy and mounting accuracy of the parts can be improved. Paradoxically, it becomes easy to confirm the mounting accuracy. Furthermore, in this embodiment,
Since the writing device 16 can be retracted by itself, it is possible to avoid liquid leakage and contamination caused by the scattering of the solvent and ink from the plate cylinder 11.

The plate surface cleaning device 15 scatters the cleaning liquid,
Due to concern about leakage, the polymer coating device 14 and the writing device 1
It is provided below 6. In this embodiment, since no solvent is used, the entire device can be easily moved. Therefore, the writing device 16 is replaced so that the space can be reduced.

Since the drying device 12 generates a large amount of heat, it is arranged as far as possible from the writing device 16 in order to prevent the influence of the heat on other devices (in particular, the laser writing device 16). In this embodiment, since there is an empty space under the dampening water supply device 18, the dampening water supply device 18 is located far from the writing device 16 and in the empty space.

The plate surface temperature sensor 36 detects the plate surface temperature in order to adjust the development time (plate surface rotation speed, time) in the developing process, and is installed near the aqueous solution coating device 13 to improve the temperature measurement accuracy. improves.

By arranging in this way, it is possible to avoid mixing of impurities in the photosensitive plate agent layer 2 formed on the base material 1 of the plate cylinder 11, and to make the structure compact. Therefore, even when installed in an existing printing press, it is possible to prevent the printing press from increasing in size.
Further, since the aqueous solution coating device 13 that uses a large amount of the solution is provided in the lower portion, the writing device and the cleaning device can be prevented from becoming dirty.

Next, the detailed configuration of these devices 12 to 16 will be described with reference to FIG. In FIG. 2, the same components as those shown in FIG. 1 are designated by the same symbols. As shown in FIG. 2, the drawing material (polymer) coating device 14 includes a coating roller 14-1 that rotates in a counterclockwise direction and a rotation (clockwise) direction of the plate cylinder 11, and a wire bar 14-2. Have.

The polymer liquid supply / collection device 40 drops the polymer liquid between the coating roller 14-1 and the wire bar 14-2, collects the polymer liquid from the coating device 14, and reuses it. Coating roller 14-1 and wire bar 1
The polymer liquid that has passed between 4-2 is applied roller 14-
Since it is applied to the base material 1 of the plate cylinder 11 in No. 1, the photosensitive plate layer 2 having a uniform thickness can be formed.

The cleaning device 15 includes a plate cleaner liquid supply device 41 and an ink cleaning liquid supply device 42 for switching valve 4
3 has a dropping pipe 44 connected thereto. Cleaning device 15
The main body has a felt 15-1 for cleaning at its tip, receives the dripping liquid from the dripping tube 44 on the felt 15-1, and cleans the plate cylinder 11. The main body of the cleaning device 15 is movable as shown in the figure.

The aqueous solution coating device 13 includes a coating roller (elastic roller) 13-1 which rotates in a counterclockwise (counterclockwise) direction of the plate cylinder 11 and a film thickness regulating roller (film thickness regulating member) 13. -2 and. As shown in FIG. 1, the developing solution supply device 45, the development stop solution supply device 46, and the stripping solution supply device 47 are disposed between the rollers 13-1 and 13-2 of the aqueous solution coating device 13 via the switching valve 50. To the dropping pipe 49 provided on the upper part of the developing solution and the developing stop solution (for example,
Water), stripping solution is supplied.

The waste liquid tank 48 collects the waste liquid from the aqueous solution coating device 13. The processing liquid (developing liquid, development stopping liquid, stripping liquid) that has passed between the coating roller 13-1 and the layer thickness regulating roller 13-2 is coated on the substrate 1 of the plate cylinder 11 by the coating roller 13-1. Therefore, even if a large amount of aqueous solution is used, liquid leakage and liquid scattering can be minimized.

The aqueous solution coating device 13 includes a developing device,
Since it also serves as a peeling device, the photosensitive plate agent layer 2 can be developed and peeled with a compact structure, and the on-press plate making device can be easily introduced.

The drying device 12 comprises an air purging device 12-2 for blowing air onto the plate cylinder 11 and a hot air blower 12-1 for blowing hot air onto the plate cylinder 11. The air purge device 12-2 removes foreign matter on the plate cylinder 11.

[Operation of plate-making printing machine] Next, the operation sequence of this printing machine will be described with reference to FIG.

(1) Plate Reclaiming Device Retracting Step The plate reclaiming module 19 is manually retracted from the plate cylinder 11 to give a space to the plate cylinder 11. This allows the plate (base material)
1 exchange space can be secured. Similarly, a maintenance space for the printing machine and the reproducing apparatus can be secured. That is, by integrally configuring each device of the plate reproducing device as a plate reproducing module, by moving the module,
It is possible to easily replace the base material and maintain the device.

(2) The base material exchange plate cylinder 11 is rotated once to take out the old base material 1 and attach the new base material 1.

(3) Plate reproduction device return The plate reproduction module 19 is returned to the operating position. This enables operation.

(4) Drawing Material Coating Process As shown by arrow B in FIG. 6, the blanket cylinder 20 is separated from the plate cylinder 11 by the eccentric mechanism, and the actuator 30 applies the coating roller 1 of the drawing material (polymer) coating device 14.
4-1 is brought into contact with the base material 1 of the plate cylinder 11. Next, while supplying the polymer liquid from the polymer liquid supply / collection device 40 to the coating roller 14-1, the coating roller 14-1 and the plate cylinder 11 are
To rotate. The polymer liquid (drawing material) is applied to the substrate 1 attached to the plate cylinder 11 by one rotation of the plate cylinder 11.

(5) Drying Step The coating roller 14-1 shown in FIG. 6 is retracted, the drying device 12 is operated, and the plate cylinder 11 is rotated to dry the polymer liquid coated on the substrate 1 of the plate cylinder 11. Then, the photosensitive plate agent layer 2 is formed on the substrate 1. To fix the photosensitive plate material layer 2 on the substrate 1, the plate cylinder 11 is rotated a plurality of times.

(6) Image Writing Process As shown in FIG. 6, the actuator 31 drives the image writing device 16 to the writing position (the position where the laser light of the writing device 16 focuses on the photosensitive plate layer 2 of the substrate 1). ), While rotating the plate cylinder 11, the photosensitive plate agent layer 2 of the plate cylinder 11 is irradiated with a laser according to the image data, imagewise exposed in a spiral shape, and an image is written.

(7) Developing Step As shown in FIGS. 2 and 6, the actuator 33 is used to move the coating roller 13-1 of the water-soluble coating device 13 to the plate cylinder 1.
1 to contact the photosensitive plate layer 2. Next, a developing solution (development processing solution) is applied from the developing solution supply device 45 to the coating roller 13-1.
The coating roller 13-1 and the plate cylinder 11 are rotated while supplying the above. As a result, the coating roller 13-1 coats the photosensitive plate material layer 2 of the plate cylinder 11 with the developing solution and develops it. At this time, the writing device 16 is preferably retracted in order to avoid contamination with the development processing liquid.

The control unit 50 detects the plate surface detection temperature of the temperature sensor 36, monitors the progress of development, and controls the rotation speed of the plate cylinder 11. When the controller 50 determines from the plate surface detection temperature that the development is completed (the image area and the non-image area are formed), the controller 50 stops the supply of the developing solution (development processing solution) from the developing solution supply device 45.

Next, while supplying the development stop solution (fixing solution, eg, water) from the development stop solution supply device 46 to the application roller 13-1, the application roller 13-1 and the plate cylinder 11 are rotated,
The development stop solution is applied to the photosensitive plate material layer 2 of the plate cylinder 11 by the application roller 13-1. As a result, fixing is performed. Further, by the air purge device 12-2, the plate cylinder 11 is
The developing solution for the photosensitive plate agent layer 2 is removed.

(8) Printing Process In the printing process, as shown in FIG. 6, the actuator 33 retracts the coating roller 13-1 of the aqueous solution coating device 13 from the plate cylinder 11, supplies the inking roller 17, and dampening water. The device 18 and the blanket cylinder 20 are brought into contact with the plate cylinder 11. Then, the paper 22 is conveyed by the impression cylinder 21 so as to contact the blanket cylinder 19 and in the direction of arrow D. By doing so, the ink image formed on the printing plate P of the plate cylinder 11 is transferred to the paper 22 via the blanket cylinder 20, and continuous printing is performed.

(9) Washing Step The washing for regenerating the plate that has been printed as described above is performed as follows. First, the plate cleaning device 15 is brought into contact with the plate cylinder 11 by the actuator 32, and the ink cleaning liquid is supplied from the ink cleaning liquid supply device 42 to the dropping pipe 44. As a result, the ink cleaning liquid is dripped on the felt 15-1 of the cleaning device 15, and the ink, dampening water, paper dust, etc. adhering to the surface of the photosensitive plate agent layer 2 of the plate cylinder 11 is wiped off.

Thereafter, the cleaning device 15 is detached from the plate cylinder 11, and the coating roller 13-1 of the water-soluble coating device 13 is brought into contact with the photosensitive plate layer 2 of the plate cylinder 11. Next, the stripping liquid is supplied from the stripping liquid supply device 47 to the dropping pipe 49, and the stripping liquid is applied to the photosensitive plate layer 2 of the plate cylinder 11 by the coating roller 13-1.
Apply to. As a result, the photosensitive plate agent layer 2 is decomposed, collected by the coating roller 13-1, and the photosensitive plate agent layer 2 is peeled off.

(10) Regeneration Step The plate body cleaning device 15 is brought into contact with the plate cylinder 11,
The plate cleaner liquid (hydrophilic treatment liquid) supply device 41 supplies the plate cleaner liquid to the dropping pipe 44. As a result, the plate cleaner liquid is dropped on the felt 15-1 of the cleaning device 15, the plate cleaner liquid is applied to the substrate 1 of the plate cylinder 11, and the substrate 1 is hydrophilized.

Next, the fixing stop solution (water) is supplied from the fixing stop solution supply device 46 to the dropping pipe 49, and the application roller 13-
1, the fixing stop solution (water) is supplied to the substrate 1 of the plate cylinder 11 to remove the hydrophilic treatment solution. Substrate 1 is washed with water,
It is possible to apply the drawing material of (4).

[Registration / Paper Thickness Adjustment Mechanism] FIG. 5 is a perspective view of the registration / paper thickness adjustment mechanism having the configuration of FIG. 1, FIG. 6 is an explanatory view of the paper thickness adjustment, and FIG. 7 is a register / paper thickness adjustment. It is explanatory drawing of operation.

As shown in FIG. 5, the rotation axis of the plate cylinder 11 is
It is rotatably supported by the eccentric bearing 41 and can move the rotating shaft. In addition, the rotary shaft of the blanket cylinder (blanket cylinder) 20 also has an eccentric bearing 42.
The shaft is rotatably supported by and can move the rotating shaft in the bearing 42. The rotary shafts of the plate cylinder 11 and the blanket cylinder 20 are connected by a link mechanism 43. The paper thickness adjusting lever 44 moves the rotation axis of the blanket cylinder 20 in the eccentric bearing 42 by rotation.

Further, a mechanism for independently moving the rotary shafts of the plate cylinder 11 and the blanket cylinder 20 in the respective eccentric bearings 41, 42 is provided separately from the link mechanism 43.

First, the paper thickness adjustment will be described. FIG. 6 (A),
As shown in FIG. 7A, when printing a paper having a predetermined paper thickness, a gap corresponding to the paper thickness is set between the impression cylinder 21 and the blanket cylinder 20, and Printing is performed while the paper having that thickness is conveyed by the blanket cylinder 20. At this time, the plate cylinder 11 and the blanket cylinder 20 are brought into contact with each other with a predetermined bearer contact pressure, whereby the ink image on the plate cylinder 11 can be transferred to the blanket cylinder 20.

On the other hand, as shown in FIG. 6B, when printing thick thick paper, the impression cylinder 21 and the blanket cylinder 20.
Since printing is performed while the paper having that thickness is conveyed by and, it is necessary to set a clearance between the impression cylinder 21 and the blanket cylinder 20 according to the paper thickness. In this case, since the impression cylinder is fixed, the blanket cylinder 20 moves, and a clearance is set between the impression cylinder 21 and the blanket cylinder 20 according to the thickness of the thick paper.

As shown in FIG. 6B, when the plate cylinder 11 does not move when the blanket cylinder 20 moves, the bearer contact pressure between the plate cylinder 11 and the blanket cylinder 20 changes and the plate cylinder Ink image No. 11 cannot be satisfactorily transferred to the blanket cylinder 20.

Therefore, as shown in FIG. 7B, the eccentric bearing 41 and the link mechanism 44 of the plate cylinder 11 cause the plate cylinder 11 to follow the movement of the blanket cylinder 20. As a result, the bearer contact pressure between the plate cylinder 11 and the blanket cylinder 20 is kept constant.

Next, the register adjustment will be described. Register adjustment is
The print position on the paper (image transfer position) is adjusted, and there are three types. The first is to move the plate cylinder 11 in the direction of the rotation axis of the plate cylinder 11 in order to adjust the position in the width direction. The second is to adjust the phase of the plate cylinder 11 by rotating the plate cylinder 11 as shown by the arrow in FIG. 7C in order to adjust the position of the paper conveyance direction (paper length direction). It is a thing. For example, the engagement of the helical teeth that drive the plate cylinder is changed to adjust the rotational direction of the plate cylinder 11. The third is the adjustment of the position of the paper in the oblique direction, in which both ends of the rotary shaft of the plate cylinder 11 are independently moved left and right to perform the adjustment in the oblique direction.

Such paper thickness / register adjustment is instructed from the outside by an eccentric bearing 41 of the plate motion 11 and an actuator for moving the rotary shaft of the plate motion 11 in the eccentric bearing 41.
Done.

Further, as shown in FIG. 7D, as described above, the blanket cylinder 20 separates from the plate motion 11 during plate making. This can also be realized by the operation of both eccentric bearings 41 and 42.

[Write operation guarantee mechanism during plate making] FIG.
The block diagram of 1st Embodiment of the plate cylinder writing device of this invention,
FIG. 9 is an explanatory diagram of the image forming operation of the configuration of FIG.
FIG. 9 is an explanatory diagram of a zero return operation of the configuration of FIG. 8. In the figure,
The same components as those described in FIGS. 1 and 2 are represented by the same symbols.

In FIG. 8, the writing device 16 comprises a writing head 160 having a laser light emitting element, and a support member 16.
1 and the writing head 160 in the rotation axis direction of the plate cylinder 11,
It has a motor 162 for moving and a feed screw 166. As shown in FIG. 9, the writing head 160 includes the plate cylinder 1
1 dot exposure, rotation of plate cylinder 11 and writing head 16
An image is written in a spiral shape on the plate cylinder 11 by the movement of 0 in the axial direction.

Since the writing head 160 writes, for example, a dot of about 20 μm on the plate cylinder 11, by making the distance between the plate cylinder 11 and the write head 160 constant, highly accurate writing is possible. Also, in accordance with the phase of the plate cylinder drive system that defines the rotational phase of the plate cylinder 11 itself,
Starting writing by the writing head 160 is also necessary for highly accurate image formation.

That is, as shown in FIG. 10 (A), the plate cylinder 1
If the drive phase of the writing device 16 matches the rotation origin R of 1, the writing device 16 can write an image from the rotation origin R of the plate cylinder 11. On the other hand, FIG.
As shown in (C), when the drive phase of the writing device 16 does not match the rotation origin R of the plate cylinder 11, the writing device 16 matches the drive phase with the rotation origin R of the plate cylinder 11. Otherwise, the image cannot be written from the rotation origin R.

Normally, the drive phase is made to coincide with the origin of rotation,
That is, the design is made so that the zero point is returned to the origin of rotation, but the plate cylinder 11 rotates and moves in the plane direction due to the above-mentioned register adjustment and paper thickness adjustment, so that a deviation occurs. FIG. 10 (B)
In the case of, the case where the rotational position of the plate cylinder 11 is adjusted by register adjustment is shown, and in the case of FIG. 10C, the case where the position of the plate cylinder 11 is displaced by register and paper thickness adjustment is shown.

In order to correct this deviation, as shown in FIG. 8, a rotary encoder 165 is provided in the drive system of the plate cylinder 11, and the rotational position of the plate cylinder 11 is detected by the counter 164. In order to match the phase of the counter 164 with the rotation origin of the plate cylinder 11, the target 11-1 is provided on the plate cylinder 11, and the target 11 is attached to the support 161 of the writing device 16.
A sensor 167 for detecting -1 is provided. Sensor 167
A well-known sensor such as a light detection sensor, a magnetic sensor, or an electrostatic sensor can be used as the. The target 11-1 is this sensor 1
It is possible to use a member (for example, a metal or a mark) suitable for the detection mode of 67.

The control circuit 163 (indicated by reference numeral “35” in FIG. 1) for controlling the write head 160 and the motor 162 of the writing device 16 has a counter 164 for counting the output pulses of the encoder 165, and the counter 164 is provided. The writing head 160 and the motor 162 are controlled according to the position of the plate cylinder 11 indicated by.

The control circuit 163 receives the target detection output of the sensor 167 and resets the counter 164 to zero. That is, the zero point (origin) with respect to the plate cylinder phase of the encoder 165 is corrected.

In this way, the plate cylinder 11 is used for printing.
However, even if the phase shifts from the writing device 16, this can be corrected. Therefore, even if the plate making device is mounted on the printing machine, it is possible to accurately form an image on the plate surface.

Further, according to the present invention, one encoder can be used by applying it to a multicolor printing machine.
FIG. 11 is a configuration diagram of a multicolor printing machine to which the printing machine of FIG. 8 is applied. In the figure, the same components as those described in FIGS. 1, 2 and 8 are represented by the same symbols.

In FIG. 11, the multicolor printing machine is constructed by connecting a plurality of plate-making printing machines (hereinafter referred to as printing units) 10 having the configuration of FIG. In the figure, a multicolor printing machine in which four color printing units 10-1 to 10-4 are installed is shown. The cut sheets stacked on the stacker 81 are conveyed to the first color printing unit 10-4 by the sheet feeding mechanism 82.

In the first-color printing unit 10-4, the cut sheet is conveyed between the blanket cylinder 20 and the impression cylinder 21 of the printing unit 10-4 via the pair of rollers 27 and 28, and the first-color printing unit 10-4 is conveyed. Print. The cut sheet printed by the first-color printing unit 10-4 is conveyed between the blanket cylinder 20 and the impression cylinder 21 of the second-color printing unit 10-3 via the intermediate cylinder 23, and the second Print the color.

The cut sheet printed by the second-color printing unit 10-3 passes through the plurality of reversing cylinders 26, 25, and 24, and the blanket cylinder 20 and the impression cylinder 21 of the third-color printing unit 10-2. In the meantime, it is conveyed and the third color is printed. The cut sheet printed by the printing unit 10-2 for the third color is conveyed between the blanket cylinder 20 and the impression cylinder 21 of the printing unit 10-1 for the fourth color via the intermediate cylinder 23, and the fourth Print the color.

For single-sided printing, the cut sheet printed by the fourth color printing unit 10-1 is discharged to the hopper 84 by the discharge belt 29 of the discharge section 83. In the case of double-sided printing, the first and second printing units 10-4 and 10-
3 performs surface printing, and the third and fourth printing units 10
-2 and 10-1 perform back side printing. That is, as is well known, the reversing cylinder 25 holds the rear end (tail) of the conveyed cut sheet, and the reversing cylinder 25 reverses the front and back of the cut sheet.

In this multicolor printing machine, each of the printing units 10-1 to 10-4 is provided with the plate making device 19 shown in FIGS. Further, the counter 16 for controlling the plate making device 19
4 is provided with control circuits 163-1 to 163-4. The writing device 16 of the plate making device 19 is shown in FIG. 8, and includes a sensor 167 that detects the target 11-1 of the plate cylinder 11.

Then, each printing unit 10-1 to 10-
The drive system for driving the four cylinders (plate cylinder 11, blanket cylinder 20, impression cylinder 22) is provided with one rotary motor.
One rotary shaft of this drive system (in the figure, the printing unit 10
One rotary encoder 165 is provided for the drive system on the rotary shaft of the (-1) impression cylinder 21).

Each of the control circuits 163-1 to 163-4 receives the target detection output of the sensor 167 and receives the counter 16
Reset 4 to zero. That is, one encoder 165
Correct the zero point (origin) for the plate cylinder phase of.

In this way, for printing, even in a multicolor printing machine, the plate cylinder 11 of each printing unit 10-1 to 104 has
Even if the phase shifts from the writing device 16, this can be corrected. Moreover, one encoder can be used in a multi-color printing machine, which reduces costs and improves the degree of freedom in design. Therefore, even if the plate-making device is mounted on the multi-color printing machine, it is possible to accurately form an image on the plate surface.

FIG. 12 shows a second embodiment of the plate cylinder writing device of the present invention.
FIG. 13 is an explanatory diagram of the embodiment of FIG. 12, and FIG. 13 is an explanatory diagram of the plate making operation of the configuration of FIG. In the figure, the same components as those described in FIGS. 1, 2 and 8 are represented by the same symbols.

In FIG. 12, a pair of actuators 71 and 73 for moving the rotary shaft of the plate cylinder 11 at both ends, and the plate cylinder 1
An actuator 72 that moves 1 in the direction of its rotation axis;
The control circuit 163 is provided with an operator panel 70 for giving instructions. In this example, the above-mentioned register adjustment and paper thickness adjustment are instructed by the “paper thickness adjustment” and “register adjustment” keys on the operator panel 70. As a result, the control circuit 163 drives the actuators 71 to 73 to perform register adjustment and paper thickness adjustment. As shown in FIG. 13, this causes the position of the plate cylinder 11 with respect to the home position H of the plate cylinder 11 during plate making.
It shifts like "P1" and "P2".

The operator panel 70 is provided with a "print" key for instructing printing and a "plate making" key for instructing plate making. When the "plate-making key" is designated, the control circuit 16
3 drives the actuators 71 to 73, and as shown in FIG. 13, the position “P
1 ”and“ P2 ”are returned to the home position H. As described above, in the plate making process, the relative positional relationship between each plate making unit and writing device and the plate cylinder 11 is the same, and even if the register / paper thickness is adjusted, the plate making function can be achieved uniformly and with high accuracy.

In addition, the register / paper thickness adjusting mechanism is used to
By returning the paper thickness adjustment position to the original position, the relative positional relationship can be easily made the same.

[Other Embodiments] Although the negative type developing method has been described in the above embodiment, a positive type developing method can also be applied.

Further, the plate making device on the printing machine is
The application example of the plate reproduction type printing machine for applying, writing, developing, cleaning, and reproducing the photosensitive plate agent has been described, but the present invention can also be applied to other plate reproducing methods and a plate making apparatus in which the reproduction of the plate surface is omitted.
The printing machine has been described as the one that supplies the dampening water and the ink to the plate surface, but it can be applied to the one that does not use the dampening water.

Further, although the writing device has been described as an image exposure device, it can be applied to a writing device used in other plate making methods, for example, a writing device such as an ink jet head. Similarly, the first embodiment and the second embodiment can be applied in combination. Moreover, the sheet-fed offset printing machine provided with the blanket cylinder and the impression cylinder has been described, but the invention can also be applied to a double-sided printing machine such as a rotary press that simultaneously prints both sides of a continuous medium such as a newspaper.

[0103]

As described above, by the adjusting mechanism,
Even if the plate cylinder position deviates from the writing device, the sensor of the writing device detects the target provided on the plate cylinder and corrects the zero point of the encoder, so the writing start position is kept uniform and highly accurate. You can

Further, by applying to a multi-color printing machine in which a plurality of plate-making printing machines are connected, it is sufficient to provide one encoder in the multi-color printing machine, so that cost reduction and design flexibility are improved. .

Further, even if the plate cylinder position is deviated from the writing device by the adjusting mechanism, the adjusting mechanism is operated to return the plate cylinder to the original position during plate making. Therefore, the relative positional relationship between the plate cylinder and the writing device is set. Can be maintained uniformly and with high accuracy.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a plate-making printer of the present invention.

FIG. 2 is a partial detailed view of the plate-making type printing machine of FIG.

3 is an explanatory diagram of a plate making process applied to the plate making type printing machine of FIG. 1. FIG.

4 is an explanatory diagram of an operation sequence of the plate-making type printing machine of FIG.

5 is a configuration diagram of a register / paper thickness adjusting mechanism of the plate-making printing machine of FIG.

6 is an explanatory diagram of paper thickness adjustment of the paper thickness adjusting mechanism of FIG.

FIG. 7: Paper thickness adjustment, examination adjustment, by the adjustment mechanism of FIG.
It is an operation explanatory view of plate-making adjustment.

FIG. 8 is a configuration diagram of a first embodiment of a writing device of the present invention.

9 is an explanatory diagram of an image forming operation of the writing device of FIG.

FIG. 10 is an explanatory diagram of a writing operation of the writing device of FIG.

11 is a configuration diagram of a multicolor printing machine to which the configuration of FIG. 8 is applied.

FIG. 12 is a configuration diagram of a second embodiment of a writing device of the present invention.

FIG. 13 is an operation explanatory diagram of the configuration of FIG. 12;

[Explanation of symbols]

1 base material 2 Photosensitive plate layer (image material layer) 2-1 Hydrophilized surface 2-2 Hydrophobic part 3 Hydrophobic ink 4 dampening water 10 Plate-making printer 11 plate cylinder 12 Drying device 13 Plate processing device (aqueous solution coating device) 14 Drawing material application device 15 Plate cleaning device 16 Writing device 17 Ink supply roller 18 Damping water supply device 19th Edition Playback Module 20 blanket body 21 impression cylinder 22 Paper (medium) 30-33, 71-73 Actuator 35, 163 Control unit 36 Non-contact temperature sensor 70 Operator panel 160 writing head 161 support 162 motor 164 counter 165 rotary encoder 166 lead screw 167 sensor 11-1 Target

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2C034 AE02 AE07 AE34                 2C250 EA42 EB25 FA03 FB01 FB12                 2H084 AA30 AA36 AE05 CC05 CC18

Claims (9)

[Claims] 1. A printing machine for supplying at least ink to a plate surface to print on a medium, a plate cylinder on which the plate surface is formed and rotating, a supply device for supplying at least the ink to the plate cylinder, and the plate. A blanket cylinder to which the image on the plate surface of the cylinder is transferred and which prints the medium with the transferred image, and an adjusting mechanism which adjusts the positions of the plate cylinder and the blanket cylinder according to the thickness of the medium and the printing position. A plate making device for writing the image to be printed on the plate cylinder, which creates the plate surface, a target provided on the plate cylinder, a detection mechanism for detecting the target, the plate cylinder According to the encoder output of the drive system that drives
A controller for controlling the writing operation of the writing device with respect to the rotating plate cylinder, and for correcting the zero point for the plate cylinder phase of the encoder of the plate cylinder drive system according to the output of the detection mechanism. A plate-making printing machine characterized by. 2. The plate-making printing machine according to claim 1, wherein the writing device includes a writing head that moves in a rotation axis direction of the plate cylinder, and the detection mechanism. 3. The plate making apparatus comprises a plate surface forming layer forming mechanism for forming a plate surface forming layer on the plate cylinder, and developing the plate surface forming layer written by the writing device to make a plate on the plate surface. 3. A plate-making printer according to claim 1, further comprising a plate reproduction mechanism for removing the plate surface forming layer. 4. A multicolor printing machine comprising a plurality of printing units for supplying at least ink to a plate surface formed on a rotating plate cylinder and printing on a medium via a blanket cylinder, wherein each printing unit comprises: The plate cylinder has a writing device for writing an image to be printed, a plate making device for creating the plate surface, a target provided on the plate cylinder, and a detection mechanism for detecting the target are provided, and each of the printing units A single encoder provided in a drive system for driving the plate cylinder, and, according to the encoder output, controlling the writing operation of the writing device with respect to the rotating plate cylinder, and depending on the output of the detection mechanism. And a control device for correcting the zero point of the encoder with respect to the plate cylinder phase. 5. A printing machine for supplying at least ink to a plate surface to print on a medium, a plate cylinder on which the plate surface is formed and rotating, a supply device for supplying at least the ink to the plate cylinder, and the plate. A blanket cylinder to which the image on the plate surface of the cylinder is transferred and which prints the medium with the transferred image, and an adjusting mechanism which adjusts the positions of the plate cylinder and the blanket cylinder according to the thickness of the medium and the printing position. And a plate-making device for writing an image to be printed on the plate cylinder, and a plate-making device for creating the plate surface, and in the plate-making process by the plate-making device, at least the plate cylinder is provided by the adjusting mechanism. To a writing origin position of the writing device. 6. The plate-making printing machine according to claim 5, further comprising a control device for controlling the adjustment mechanism to return to the writing origin position in response to the plate-making instruction. 7. The plate making apparatus includes a plate surface forming layer forming mechanism that forms a plate surface forming layer on the plate cylinder, and develops the plate surface forming layer written by the writing device to make a plate on the plate surface. The plate-making printing machine according to claim 5, further comprising a plate reproducing mechanism for removing the plate surface forming layer. 8. A plate making process of making a plate surface on the plate cylinder by a writing device for writing an image to be printed on the plate cylinder, and supplying at least ink to the plate surface of the plate cylinder, and passing through a blanket cylinder to a medium. In a plate-making printing method having a printing step for performing printing on, the position of the plate cylinder and the blanket cylinder is adjusted according to the thickness of the medium and the printing position, and the plate cylinder is provided. The target is detected by the sensor,
A step of performing a zero point correction on a plate cylinder phase of an encoder of a drive system for driving the plate cylinder and controlling a writing operation of the writing device with respect to the rotating plate cylinder. 9. A plate making process of making a plate surface on the plate cylinder by a writing device for writing an image to be printed on the plate cylinder, and supplying at least ink to the plate surface of the plate cylinder, and passing through a blanket cylinder to a medium. In a plate-making printing method having a printing step for performing printing on the plate cylinder, the position of the plate cylinder and the blanket cylinder is adjusted according to the thickness of the medium and the printing position, and in the plate making step, And a step of returning at least the plate cylinder to the writing origin position of the writing device from the position adjusted in the adjusting step.