JP2737749B2 - Plate making equipment and plate positioning mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plate making apparatus for color printing and a plate material positioning mechanism. In recent years,
Publications and newspapers CTS (computerizd typesetting sy
Stem; electronic editing typesetting system) is remarkable, plate making process consisting of exposure part and processing part-forming step to form positioning part on plate material for positioning of plate material mounting position in plate making printing machine-plate making 2. Description of the Related Art A printing system including an offset printing process performed by a printing press is performed.

In accordance with this, the plate making process has been streamlined, and OPC
(Organic photo conductor) The development of plate materials has made it possible to directly expose and write on plate materials. On the other hand, the colorization of printing has been rapidly progressing, and therefore, the setting position of each plate material (four plates of red plate, blue plate, yellow plate and black plate) at the time of exposure in the plate making process, and It is required that the set position at which each plate material is wound around four corresponding plate cylinders of a rotary press be high in accuracy.

[0003]

2. Description of the Related Art A plate making process is performed by a plate making apparatus as shown in FIG. 2 in which the following components are connected by a conveyor.

[0004] The plate making apparatus includes an exposure unit, a processing unit, and a forming unit. The exposed portion is a rectangular OPC plate material 1 having a predetermined dimension (for example, a photosensitive layer formed on the surface of an aluminum base plate having a thickness of about 0.3 mm, hereinafter referred to as a plate material).
Plate feeding unit 3 with hopper 2 for stacking and holding about 500 sheets
And a plate member 1 provided with an optical unit 5a and a charger 5b, which is sent one by one from the plate supply unit 3, is positioned and fixed on a table 4, exposed by a semiconductor laser, and exposed to a latent image for each color (static image). And an exposure unit 6 for forming an electrostatic latent image).

The processing unit includes a developing unit 7 for developing the plate material 1 exposed with the toner mixed in the liquid, a drying unit 8 for drying the developed plate material 1, and a side edge of the plate material 1. An edge cleaning unit 9 for removing the adhered toner, and a fixing unit 10 for heating and fixing the toner image to the plate material 1 whose side edges have been cleaned are provided.

The processing unit further includes a cooling unit 11 for air-cooling the fixed plate material 1 with a fan or the like, and subjecting the cooled plate material 1 to a strong alkali and weak alkali shower to remove the photosensitive agent in the non-image area. An elution portion 12 for dissolving and flowing out, a gum portion 13 for performing a desensitization process (a process for preventing adhesion of hand fat and the like) of the plate material 1 from which the photosensitive agent in the non-image portion has been removed, and a gum A drying unit 14 for drying and cooling the plate 1 sent from the unit 13.

[0007] Each of the red, blue, yellow, and black plates is generally made by the same plate making apparatus. The forming section is where a positioning section is formed on the plate material in order to position the mounting position of the plate material in the plate making printing machine.

Each part of the plate making apparatus having the above-described configuration is
Are passed through and processed to produce respective plates. Hereinafter, a positioning structure for setting the plate 1 on the table 4 in the exposure unit 6 will be described with reference to FIG.

A first positioning member for contacting the table 4 with two desired long-side portions of the rectangular plate 1 selected at two desired positions (each of which is located at a desired distance near the corner of the plate 1). Two positioning pins 19a are provided.

A second positioning member, that is, a positioning pin 19b is disposed on a straight line orthogonal to a straight line connecting the two positioning pins 19a, and contacts the selected short side of the printing plate 1. The distance b from the selected corner of the printing plate 1 to one positioning pin 19a is short, and the distance c from the other corner to the other positioning pin 19a is large. In addition, positioning pins 19 are selected from the selected corner of plate 1.
The distance a to b is almost half the length of the short side.

On the other hand, advance toward the positioning pin 19a.
A reciprocating linear reciprocating motion (for example, reciprocating motion driven by an air cylinder) is performed, and the plate 1 is pushed in the direction of the positioning pin 19a by advancing and contacting the other long side of the plate 1,
A first biasing member for positioning in a direction parallel to the short side, that is, two positioning pins 19c is mounted on the table 4.

[0012] Also, advance toward the positioning pin 19b.
The reciprocating linear reciprocating motion (for example, reciprocating motion by an air cylinder drive), advancing and abutting against the other short side of the printing plate 1, pushes the printing plate 1 in the direction of the positioning pin 19b, and the direction parallel to the long side. A second biasing member for positioning, i.e., a positioning pin 19d, is mounted on the table 4.

The above-mentioned positioning pins 19a, 19b, 19c, 19
d allows it to descend below the table surface and rise vertically upward. This makes it easy to carry the plate 1 onto the table 4 from the previous process and to carry the plate 1 from the table 4 to the next process.

The respective pins are arranged as described above, and the selected long side of the plate material 1 carried into the table 4 is brought into contact with the positioning pins 19a by the positioning pins 19c.
At 19d, the selected short side of the plate 1 is brought into contact with the positioning pins 19b, thereby positioning the plate 1, and then exposing with a semiconductor laser to form a latent image at a predetermined position on the plate 1. doing.

The forming section includes a punching step performed using a punching device and a bending step performed using a bending device. In the punching process, after the plate 1 is positioned and set on the table, as shown in FIG. 4, a notch for positioning (not shown) is formed in each central portion of the opposite short sides of the plate 1. At the same time, a positioning hole 15 is drilled on one short side in proximity to the positioning notch.

The positioning holes 15 are used to set the position of the plate 1 in the longitudinal direction in the bending step, and the positioning notch is used to set the position in the width direction of the plate 1 in the bending step. This is for setting straightness.

The positioning hole 15 and the positioning notch are used for positioning when the plate material 1 is wound around a plate cylinder in a plate making printing machine for performing offset printing. In the bending step, each of the opposing short side edges is bent inwardly into a V-shape.

The plate material 1 punched and bent is stacked on a stacker not shown. The plate material 1 stacked on the stacker is taken out of the stacker, wound around an outer peripheral surface of a plate cylinder corresponding to a plate color of a plate making press (for example, a rotary press), and inserted into an engagement groove provided on the outer peripheral surface of the plate cylinder. The plate material 1 is wound around the plate cylinder by inserting and engaging the respective bent portions.

[0019]

After the plate making as described above,
A plate material is wound around and mounted on a plate-making printing machine, but if the mounting position is shifted, color shift or the like occurs. For this reason, after the end of the plate making process, a positioning hole and a positioning notch are punched by a punch device. However, if the position of the positioning hole or the like is slightly deviated from the reference side of the plate material, it is formed in the exposure unit. It will be shifted from the position of the image.

Therefore, when an image is printed a plurality of times as in the case of color printing, there is a problem that the image for each color is shifted and appears as a color shift. The present invention has been created in view of such a point,
It is an object of the present invention to provide a plate making apparatus and a plate material positioning mechanism that do not cause color shift or the like due to image shift during color printing in which plates are overlapped a plurality of times.

[0021]

In order to achieve the above object, a plate making apparatus according to the present invention comprises: a first positioning member;
A second positioning member, a first urging member for urging the plate material in a direction toward the first positioning member, and
A second biasing member that biases in a direction different from the direction in which the biasing member is biased toward the second positioning member, and the first and second positioning members and the second biasing member. An exposure unit is provided for forming a latent image by exposing the printing material positioned by the first urging member.

The image processing apparatus further includes a processing unit for performing a process for visualizing a latent image formed by the exposure unit. Further, the third and fourth positioning members arranged in the same arrangement positional relationship as the arrangement positional relationship of the first and second positioning members, and the plate material in the third
A third urging member for urging in a direction toward the fourth positioning member, and a direction different from the direction in which the third urging member is energized and toward the fourth positioning member. A fourth urging member, and a plate material is mounted on the plate making press with respect to the plate material positioned by the third and fourth positioning members and the third and fourth urging members. In this case, a configuration is provided in which a positioning portion for positioning the mounting position of the plate material with respect to a member of the plate making press is formed on the plate material.

According to the present invention, the reference long side and the reference short side are selected for the plate material, and the exposed portion opposes the first positioning member (positioning pin 19a in the figure) and the reference short side opposite to the reference long side. Then, a second positioning member (positioning pin 19b in the figure) is provided, a first urging member (indicated by a positioning pin 19c in the figure) for urging the plate material in the direction of the first positioning member, and a second urging member. A second biasing member (shown by a positioning pin 19d in the figure) for biasing the plate material in the direction of the positioning member is provided.

In the forming portion, a third positioning member (positioning pin 20a in the figure) faces the reference long side and a fourth positioning member (positioning pin 20 in the figure) faces the reference short side.
b), a third urging member (indicated by a positioning pin 20c in the figure) for urging the plate material in the direction of the first positioning member, and a fourth urging member for urging the plate material in the direction of the fourth positioning member. (Shown by positioning pins 20d in the figure).

In the exposure section and the forming section, the arrangement positions of the first and second positioning members and the third and fourth positioning members are made equal. Furthermore, the first and second
And the third and fourth urging members have the same relative arrangement positions.

As a result, the image position from the reference long side and the reference short side formed on the plate material at the exposure section and the image position from the reference long side and the reference short side formed on the plate material at the formation section are different. There is no shift. Therefore, even when images are printed a plurality of times, such as in color printing, no color shift occurs.

According to a second aspect of the present invention, there is provided a plate material positioning mechanism comprising: a first positioning member; a second positioning member; and a first biasing member for biasing the plate material in a direction toward the first positioning member. A second urging member for urging the plate material in a direction different from the direction urged by the first urging member and in a direction toward the second positioning member; An exposure unit that forms a latent image by exposing the plate material positioned by the second positioning member and the first and second urging members, and a processing unit that performs a process of visualizing the latent image formed by the exposure unit A plate making apparatus, comprising: a forming section that forms a positioning section on the plate material for positioning the mounting position of the plate material between members of the plate making press when the plate material is mounted on the plate making press. A positioning mechanism for a plate material at a forming section, wherein the first and second positions are A third, fourth positioning member are arranged in a position relationship same position relationship and fit member.

Further, a third urging member for urging the plate material in the direction toward the third positioning member and a fourth urging member which is different from the direction in which the third urging member is urged by the fourth urging member. And a fourth urging member for urging in the direction toward the positioning member.

A third positioning member, a fourth positioning member, and a third biasing member for biasing the plate toward the third positioning member are provided. A fourth urging member for urging the plate material in a direction different from the direction in which the third urging member is urged and toward the fourth positioning member. When the plate material is mounted on the plate printing machine by the positioning member of No. 4 and the third and fourth urging members, the mounting position of the plate material is determined with respect to the member of the plate making press. Forming section for forming a positioning section on the plate material, an exposing section for forming a latent image on the plate material by exposing the plate material in a state where the plate material is positioned by the positioning mechanism, and visualizing the latent image formed by the exposing section. In a plate making apparatus comprising a processing unit for performing A plate material of the positioning mechanism in, a third, first, second positioning member are arranged in a fourth position relation between the same position relationship with the positioning member.

Further, a first urging member for urging the plate material in a direction toward the first positioning member, and a second urging member for urging the plate material in a direction different from the direction in which the first urging member is urged. And a second urging member for urging in the direction toward the positioning member.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. The same reference numerals indicate the same objects throughout the drawings.

FIG. 1 is a plan view of a positioning structure in a punch apparatus of the present invention, FIG. 2 is a side view of a plate making apparatus to which the present invention is applied, and FIG. 3 is a plan view of a positioning structure of a plate material in an exposure unit. FIG.

The plate making apparatus includes an exposure unit, a processing unit, and a forming unit. As shown in FIG. 2, the exposure unit includes a plate supply unit 3, an optical unit 5a and a charger 5b, and positions the plate materials 1 sent one by one from the plate supply unit 3 on a table 4. And an exposure unit 6 that is fixed and exposed by a semiconductor laser to form a latent image (electrostatic latent image) for each color.

The processing section includes a developing section 7 and the developed plate 1
Drying section 8, an edge cleaning section 9 for removing toner, a fixing section 10, a cooling section 11 for air cooling, an elution section 12 for dissolving and flowing out the photosensitive agent in the non-image section, and a non-image section. The gum portion 13 is subjected to a desensitization treatment (a treatment for preventing adhesion of hand fats and the like) of the plate material 1 from which the photosensitive agent has been removed to homogenize it.
And a drying unit 14 for drying and cooling the plate material 1 sent from the gum unit 13.

In the forming section, a positioning section is formed on the plate material in order to position the mounting position of the plate material in the plate making press. In a punching device used in a forming unit for punching a positioning hole for setting a square plate material 1 after setting a plate in a plate-making printing machine, as shown in FIG.
A second contact point between two selected long sides of the rectangular plate material 1 (long sides based on the positioning standard in the exposure unit) (two places that are desirably separated such that each is near a corner of the plate material 1). Three positioning members, that is, two positioning pins 20a are provided.

A fourth positioning member, that is, a positioning pin, which contacts a selected short side of the printing plate 1 (a short side determined as a reference for positioning in the exposure section) on a straight line orthogonal to a straight line connecting the two positioning pins 20a. 20b is provided.

The distance b from the selected corner of the plate 1 to one of the positioning pins 20a is the distance b (shown in FIG. 3) from the first positioning member or positioning pin 19a arranged on the table 4 of the exposure unit. The distance c from the selected corner to the other positioning pin 20a is equal to the distance c (shown in FIG. 3) from the selected corner to the positioning pin 19b arranged on the table 4 of the exposure unit.

The distance a from the selected corner of the plate 1 to the positioning pin 20b is the distance a (shown in FIG. 3) from the second positioning member or positioning pin 19b disposed on the table 4 of the exposure unit. Is equal to.

Further, the diameter of the positioning pins 20a, 20b is made equal to the diameter of the positioning pins 19a, 19b of the exposure section shown in FIG. On the other hand, a linear reciprocating motion of forward and backward movement (for example, reciprocating motion by driving an air cylinder) is performed toward the positioning pin 20a, and the printing material 1 is moved forward and abuts on the other long side of the printing plate 1 so that the printing plate 1 is positioned. A third biasing member, ie, two positioning pins 20c, which is pushed in the direction of 20a and positioned in a direction parallel to the short side, is mounted on the table 21.

Further, it is moved forward toward the positioning pin 20b.
The reciprocating linear reciprocating motion (for example, reciprocating by driving the air cylinder), the reciprocating motion, and abutting against the other short side of the printing plate 1 pushes the printing plate 1 in the direction of the positioning pin 20b, and the direction parallel to the long side. A fourth urging member for positioning, ie, a positioning pin 20d, is mounted on the table 21.

The structure and position of the positioning pins 20c and 20d are equal to the structure and position of the positioning pins 19c and 19d arranged on the table 4 of the exposure unit shown in FIG.

The diameter of each of the positioning pins 20c and 20d is made equal to the diameter of each of the positioning pins 19c and 19d of the exposure section shown in FIG. Note that the positioning pins 20a, 20b, 20c, and 20d of the punching device can be moved downward under the table 21 and vertically upward, so that the drying unit 14
From the table 21 and from the table 21 to the next bending step.

As described above, the positioning pins 20a, 20b, 20c, and 20d are arranged on the table 21 of the punching device in the forming section, and the printing plate 1 carried into the table 21 by the positioning pins 20c.
The selected long side of the plate 1 is brought into contact with the positioning pin 20a with the positioning pin 20a.
The plate material 1 is positioned by abutting on the plate b, and then the positioning hole 15 and the positioning notch are formed.

As described above, the reference long side and the reference short side of the plate material are made the same in both the exposure section 6 and the punching apparatus in the forming section.
In addition, since the positioning pins having the same arrangement positional relationship are employed, there is no error in the set position, and the positioning holes and the like are drilled at predetermined positions with high precision.

Therefore, even if a plurality of plate materials of different colors are set on the corresponding plate cylinders of a plate-making printing machine (for example, rotary press) and color-printed, no misalignment occurs between the plate materials. No color shift or the like occurs.

[0046]

Since the present invention is configured as described above, it has the following effects.

For example, even when printing is performed by printing a plate a plurality of times as in the case of color printing, since each image matches, no color shift or the like occurs.

[Brief description of the drawings]

FIG. 1 is a plan view of a positioning structure in a punch device according to the present invention.

FIG. 2 is a side view of a plate making apparatus to which the present invention is applied.

FIG. 3 is a plan view of a plate material positioning structure in an exposure unit.

FIG. 4 is a plan view of a plate material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Plate material 2 Hopper 3 Plate feeding part 4,21 Table 5a Optical unit 5b Charger 6 Exposure part 7 Developing part 8,14 Drying part 9 Edge cleaning part 10 Fixing part 11 Cooling part 12 Elution part 13 Gum part 15 Positioning hole 19a, 19b, 19c, 19d Positioning pin 20a, 20b, 20c, 20d Positioning pin

Claims (3)

(57) [Claims] 1. A first positioning member, a second positioning member, a first biasing member for biasing a plate material in a direction toward the first positioning member, and a first biasing member for biasing the plate material to the first positioning member. A second urging member for urging in a direction different from a direction in which the urging member is biased toward the second positioning member, and the first and second positioning members. And the first,
An exposure unit for forming a latent image by exposure on the plate material positioned by the second urging member; a processing unit for performing a process of visualizing the latent image formed by the exposure unit; Third and fourth positioning members arranged in the same arrangement positional relationship as that of the first positioning member, and a third urging member for urging the plate in a direction toward the third positioning member. A member, and a fourth urging member for urging the plate in a direction different from the direction of urging by the third urging member and toward the fourth positioning member. When the plate material is attached to the plate making press with respect to the plate material positioned by the third and fourth positioning members and the third and fourth urging members, Forming a positioning portion on the printing plate for positioning the mounting position of the printing plate between A Department, plate making creating apparatus characterized by comprising comprises. 2. A first positioning member, a second positioning member, a first urging member for urging a plate material in a direction toward the first positioning member, and a first urging member for urging the plate material to the first positioning member. A second urging member for urging in a direction different from a direction in which the urging member is biased toward the second positioning member, and the first and second positioning members. And the first,
An exposing section for forming a latent image by exposing the plate material positioned by the second urging member by exposure, a processing section for performing a process of visualizing the latent image formed by the exposing section, and plate-making printing of the plate material And a forming part for forming a positioning portion for positioning the mounting position of the printing plate material between the printing plate member and a member of the printing plate making machine when the printing plate is mounted on the printing plate printing machine. And a third and fourth positioning member arranged in the same arrangement positional relationship as the arrangement positional relationship between the first and second positioning members. A third urging member for urging in the direction toward the third positioning member, and a direction different from the direction in which the third urging member is urged toward the fourth positioning member. And a fourth biasing member for biasing the plate material. Positioning mechanism. 3. A third positioning member, a fourth positioning member, a third urging member for urging the plate material in a direction toward the third positioning member, and a third urging member for urging the plate material with the third positioning member. A fourth biasing member for biasing the biasing member in a direction different from the direction in which the biasing member biases toward the fourth positioning member, and the third and fourth positioning members. And the third,
A positioning portion for positioning the plate material mounting position between the plate material positioned by the fourth urging member and a member of the plate making press when the plate material is mounted on the plate making press; Forming a latent image on the plate material by exposing the plate material to light with the plate material positioned by a positioning mechanism; and forming a latent image formed by the exposure unit on the plate material. A plate-making mechanism in the exposure unit in the plate-making apparatus comprising a processing unit for performing the processing, wherein the plate-member is arranged in the same arrangement positional relationship as the arrangement positional relationship of the third and fourth positioning members. First and second positioning members, a first urging member for urging the plate in a direction toward the first positioning member, and the first urging member for urging the plate material In a direction different from the direction and toward the second positioning member. And a second biasing member for biasing the plate material.