JP3017967B2 - Plate making equipment for newspaper printing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called CTP (Computer To Plain) in which a drawing image signal from a computer is directly drawn on a plate material using a laser.
The present invention relates to an improvement of a newspaper printing plate making apparatus of the te) type.

[0002]

2. Description of the Related Art Conventionally, as this kind of plate making apparatus for newspaper printing, for example, one described in Japanese Patent Application Laid-Open No. 9-66595 is known. Basically, it is a plate feeding device (plate feeding unit) that supplies a plate material, and an exposure device (a charging / charging unit) that exposes the plate material sent from the plate feeding device in a horizontal posture.
(Drawing unit) and a developing device (developing / fixing unit, elution unit, post-processing unit) for developing the plate material from the exposure device.

[0003]

However, such a plate is a standard-width plate material (a plate material for one newspaper page or a plate material for two pages of a newspaper in which the two are vertically connected) and doubled. Although it is described that it is possible to handle a plate material of a width (a plate material of two newspapers connecting two newspapers horizontally and a plate material of four newspapers connecting two vertically), The specific configuration was not clear, and it was unclear whether these could be properly and efficiently made.

In the plate making apparatus disclosed in Japanese Patent Application Laid-Open No. 9-66595, a laser scanning head is opposed to a horizontally arranged plate material, and the laser scanning head is moved at a high speed in the left-right direction so as to be placed on the plate material. I try to draw. However, in order to repeat the operation of stopping the laser scanning head moving at high speed at the edge of the plate material and then moving the laser scanning head in the reverse direction from there, it is necessary to control the position and speed of the laser scanning head. Becomes significantly more complicated. As a result, it takes a long time to produce a printing plate, or it is extremely difficult to produce a printing plate with high accuracy that enables clear printing in terms of the accuracy of mechanical position control. There was a problem.

On the other hand, as a solution to the above-mentioned problem of drawing on a printing plate arranged horizontally by a laser scanning head, a laser exposure apparatus for a plate material wound on a drum as shown in FIG. Is being developed. That is, in this exposure apparatus, the plate material 44 is wound on the drum 42 in the posture shown in FIG. 6, and the drum 42 is driven to rotate in the direction of the arrow a by the motor M. The laser beam multi-beam 6 controlled by the image signal of the computer C
4, an image band 66 having a band width B is formed on the plate material 44. While the drum 42 makes one rotation, the optical table 54 on which the generator of the multi-beam 64 is mounted moves by the moving mechanism H continuously at a constant speed in the direction of the arrow b by the bandwidth.

In the drum-type laser exposure apparatus shown in FIG. 6, the optical table 54 provided with the laser multi-beam 64 is continuously moved in the horizontal direction. The exposure speed can be drastically increased and the position control of the laser scanning head becomes easy, so that clear printing is possible. An accurate printing plate can be manufactured.

However, in the drum type exposure apparatus shown in FIG.
As shown in FIG. 7, the drum 42 rotates at a constant speed,
4 moves by the bandwidth B per rotation, so that the image band 66 shifts by the bandwidth B every rotation, and
4 will be recorded and formed spirally. Plate 4
When 4 is developed, a recorded image 68 composed of a large number of image bands 66 is formed, but becomes a parallelogram shifted by the bandwidth B due to spiral recording. Such a deformation of the recorded image 68 with respect to the plate material 44 cannot be adopted as a printing plate.

In a printing plate for newspaper, if the drum circumference is 46 inches, the pixel density is 909 dots per inch, and the light source array 22 of 128 beams is employed, the bandwidth B is equivalent to 128 pixels, that is, 128/90
9 = 0.14 inches, or 3.6 mm. That is, as a result of the spiral recording, the top line 68c and the ground line 68d of the recorded image 68 are distorted by 3.6 mm and cannot be visually ignored. The inclination angle θ is 0.17 degrees from tan θ = 0.14 / 46, and the start side line 68a and the end side line 68b have a slope of 0.17 degrees while being parallel.

The printing plate 44 of the start side line 68a of this image
In order to eliminate the inclination with respect to the starting side line 46, an intermittent moving method shown in FIG. That is, the optical table 54 is stopped while the drum 42 makes one rotation for image recording. Thereafter, the optical table 54 is moved to the band B by the moving mechanism H.
Just move. This moving time must be set to an integral multiple of the time required for one rotation of the drum. If this intermittent movement method is adopted, the image band 66 is formed not in a spiral shape but in a regular circular shape, so that the recorded image 68 does not become distorted.
It is correctly recorded on the plate material 44 in a square shape. But,
The intermittent movement has the disadvantage that the total exposure time is lengthened several times and the efficiency of the plate making operation is reduced. In addition, the repeated movement and stop of the heavy optical system complicates and increases the price of the apparatus, and furthermore, the apparatus becomes a source of vibration, which is likely to cause image deterioration and failure.

In order to solve the problems in the drum type exposure apparatus shown in FIGS. 7 and 8, the inventor of the present application has developed a new exposure method as shown in FIG. A patent application has been filed as Japanese Patent Application No. 8-293494. That is, in the invention shown in FIG. 9, the plate member 44 is spirally wound around the drum 42 in advance at an inclination angle of the angle θ. Then, the optical table 54 is moved in the direction of the arrow b in parallel with the axis g of the drum 42, and the recording start point of each image band 66 is further advanced a little by an electrical timing signal. Such a printing plate is obtained.

In the invention of Japanese Patent Application No. 8-293494, as shown in FIG.
By moving in a direction having an angle of only θ and
As shown in the lower drawing of FIG. 10, a printing plate having no deformation with respect to the plate material 44 can be produced at a high speed, and excellent practical utility can be exhibited.

However, in the invention of Japanese Patent Application No. 8-293494, as shown in FIG. 10, a plate material 44 is tilted at an angle θ to a drum 42 supported rotatably in a horizontal direction. It must be wound in a spiral shape, and there is a problem that a mechanism for attaching the plate material 44 to the drum 42 becomes complicated.

That is, when the plate member 44 is mounted, as shown in FIG. 11, the direction of movement of the plate member 44 traveling on the table in a direction perpendicular to the axis g of the drum 42 is changed. is supplied to the drum 42 with θ added,
It is necessary to wind this in a spiral shape,
There is a disadvantage that the transfer mechanism T of No. 4 is significantly complicated.

The present invention has been made to solve the above-mentioned problems in a plate making apparatus having a drum type exposure apparatus according to the prior patent application shown in FIGS. This is because the plate material can be spirally wound around the exposure cylinder and fixed without using the complicated plate material transfer mechanism T, and the standard width plate material and the double width plate material can be properly separated. An object of the present invention is to provide a newspaper printing plate-making apparatus including an exposure cylinder type exposure apparatus capable of efficiently performing plate-making.

[0015]

According to a first aspect of the present invention, there is provided a plate making apparatus for newspaper printing which basically includes a plate feeder for supplying a plate material and a plate feeder which is provided in a direction perpendicular to a direction in which the plate material travels. Is disposed at an angle θ, and an exposure cylinder on which the plate material is wound in a spiral shape, and an exposure device for exposing the plate material wound on the exposure cylinder, and exposing the plate material from the plate feeding device. Exposure device, a development processing device for developing the plate material from the exposure device, and two standard width plate materials or one double width plate material transferred from the plate feeding device to the development processing device via the exposure device And a guiding device capable of guiding the vehicle.

According to a second aspect of the present invention, in the first aspect, the plate feeding device is a plate feeding device including a slip sheet discharging device for discharging the slip sheet to the side. .

According to a third aspect of the present invention, in the first aspect of the present invention, a plurality of pins are provided in a line in a row on the straight line inclined at an angle θ with respect to the central axis g of the exposure cylinder. An exposure apparatus having a configuration in which the pin is engaged with a hole C formed at the front end of the plate material to wind the plate material spirally around the exposure cylinder.

According to a fourth aspect of the present invention, in the first aspect of the present invention, a punching device for forming a hole at the front end of the printing plate is provided at a position preceding the exposure device.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the guide device is located between two standard-width printing plates, and a separating position for separating them from each other and one double-width printing plate. And a guide plate for guiding one end of one double-width printing plate, and two standard-width printing plates can be pushed toward the separation plate side. One of them is a guide device composed of left and right pushing members capable of pushing one double-width plate material toward the guide plate.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the outline of a newspaper printing plate making apparatus according to the present invention. FIG. 2 is a side view of FIG. 1. FIG. 3 is an explanatory diagram for explaining a process of making a plate material having two standard widths. FIG. 4 is an explanatory diagram for explaining the process of making one double-width plate material.

The plate making device 1 for newspaper printing includes a plate feeding device 2, a slip sheet discharging device 3, a punching device 4, a transport device 5, an exposure device 6,
The main parts of the plate discharging device 7, the developing device 8, the direction changing device 9, the folding device 10, the plate storage device 11, and the guide device 12 are constituted.

The plate supplying device 2 supplies a plate material A,
In this example, the dark room 13 where the packed plate material A is unpacked is opened.
And the table 14 on which the unpacked plate materials A are placed in a stacked state with the interleaving paper B interposed therebetween, and the placed plate materials A are sucked one by one from the top and forward ( (Right side in FIG. 1).

The plate material A is a photosensitive printing plate (so-called PS plate) in which a photosensitive material such as a photocurable resin is applied to an aluminum substrate in advance in this example, and two standard width plate materials (newspaper 2). It is a plate material for two newspapers in which pages are vertically connected) A1 or a double-width plate material (plate material for four newspapers in which four newspapers are connected vertically and horizontally) A2.

The slip sheet discharge device 3 is provided in the plate feeding device 2 and discharges the slip sheet B to the side. In this example, the right and left sides of the interleaving paper B interposed between the plate materials A placed on the table 14 of the plate feeding device 2 are transported in the left-right direction (vertical direction in FIG. 1). The interleaf discharge device 3 is composed of the suction transfer device 16 and the left and right discharge rollers 17 for discharging the interleaf B transferred by the suction transfer device 16. The suction transfer device 16 is operated so as not to interfere with the suction transfer device 15 of the plate feeding device 2.

The punching device 4 is provided at a position before the exposure device 6 and forms a hole C in the plate material A from the plate feeding device 2. In this example, a table 18 is provided between the plate feeding device 2 and the exposure device 6 and places a continuous plate material A on the table 14 of the plate feeding device 2. The press machine forms a plurality of holes C arranged in a direction perpendicular to the longitudinal axis. The positions of the plurality of holes C are selected such that when a printing plate is mounted on a plate cylinder of a rotary printing press after plate making, a mounting pin provided on the plate cylinder side just enters the hole C. The printing plate is mounted on the plate cylinder of the rotary printing press using the hole C.

The transport device 5 transports the plate material A from the punching device 4 to the exposure device 6. In this example, a table 19 continuous with the table 18 of the punching device 4 and a table 19 of the punching device 4 are provided so as to be operable in the front-rear direction through the table 18, and the plate material A placed thereon is pushed forward to And a carrier 20 for carrying. Note that the carrier 20
Is operated by an actuator (not shown) such as an air cylinder.

The exposure device 6 exposes the plate material A from the plate feeding device 2. In this example, the exposure cylinder 2 on which the plate material A sent from the punching device 5 is spirally wound.
1 and an exposure device (laser light scanning head) 22 for exposing the plate material A wound thereon. Exposure cylinder 21
Is a predetermined angle θ (0.17 °) with respect to the plate material A conveyed in one direction so that the plate material A is spirally wound.
(FIG. 1 is shown exaggeratedly). The exposure cylinder 21 is supported so as to be rotated by a rotation mechanism (servo motor) 23.
A pin 24 for positioning the plate material A by fitting it into the hole C of the plate material A, a vacuum suction device (not shown) for holding the rear end of the plate material A, And a winding roller 25 for winding or unwinding the plate material A.

The exposing unit 22 directly exposes the plate material A with a drawing corresponding to a drawing image signal from a computer. The exposing unit 22 is moved parallel to the axis of the exposure cylinder 21 by a moving mechanism 26, or As shown in FIG. 10, the plate can be moved in parallel with the front end face 50 of the plate material spirally wound around the exposure drum when viewed from the front.

The plate discharging device 7 sends the plate material A from the exposure device 6 to the developing device 8. In this example, a table 27 for carrying the plate material A from the exposure device 6 and a plate discharge roller 28 for transporting the plate material A carried thereon forward. The table 27 is lower than the table 19 of the transport device 4 so that the plate material A from the exposure device 6 can be accurately sent to the developing device 8.

When the hole C of the plate A is formed on a straight line perpendicular to the direction of travel of the plate A as shown in FIG. 3, the plate A is inclined by an angle θ. Exposure cylinder 21
In order to spirally wind the exposure cylinder 21, the pins 24 of the exposure cylinder 21 must be arranged on a straight line inclined by an angle θ with respect to the central axis g of the exposure cylinder 21, as shown in FIG. It is.

Conversely, when the pins 24 of the exposure cylinder 21 are arranged in the direction of the central axis g of the exposure cylinder 21, the plate material A
The hole C must be formed on a straight line inclined by an angle θ with respect to the direction of travel of the plate material A.

The developing device 8 develops the exposed plate material A. In this example, although not shown in the figure, a developing unit that removes a portion other than a portion hardened by exposure with a developer, a gum portion that applies a gum solution to the removed portion and dries, and the like are provided. I have.

The direction changing device 9 changes the direction of the plate material A from the developing device 8 to a right angle. In this example,
A table 29 for carrying the plate material A from the development processing device 8 is provided, and the direction is changed to the right (downward in FIG. 1) and transported.

The folding device 10 forms a plate by forming a bent portion D on the plate material A from the direction changing device 9. In this example, in order to be able to be mounted on a rotary press (not shown), a press machine is provided in which a substantially V-shaped bent portion D is formed before and after the plate material A.

The printing plate storage device 11 stores the printing plates from the folding device 10 sequentially in a predetermined state.

The guide device 12 is for guiding two standard width plate materials A1 or one double width plate material A2 conveyed from the plate feeding device 2 to the development processing device 8 via the exposure device 6. It is. In this example, a separation position for separating the two standard width plate members A1 and separating them from each other, and a vertically movable plate member A2 capable of retracting so as not to interfere with one double width plate member A2. A separation plate 30, a guide plate 31 for guiding one side of one double-width plate material A2, and two standard-width plate materials A1 are pushed toward the separation plate 30, and one of them is one double-width plate material. And the right and left pushers 32 for pushing the plate material A2 toward the guide plate 31 side.

The separation plate 30 is connected to the table 1 of the plate feeding device 2.
4, the table 18 of the punching device 4, the table 19 of the transporting device 5, the table 27 of the plate discharging device 7, and the table 29 of the direction changing device 9 are provided so as to be able to go up and down through respective centers, and actuators such as air cylinders are provided. (Not shown), it is raised and lowered from a separation position protruding upward to a retracted position buried downward.

The guide plate 31 is provided on the table 1 of the plate feeding device 2.
4, the table 18 of the punching device 4, the table 19 of the transport device 5, and the table 27 of the plate discharging device 7 are fixed to the right side of each.

The pushing body 32 is provided on the table 1 of the punch 4.
8. The table 19 of the transport device 5 and the table 27 of the plate discharging device 7 are provided so as to be movable in the left-right direction through right and left, and are provided with an actuator (not shown) such as an air cylinder.
It is operated according to. The pushing body 32 is
It is provided so as not to interfere with the guide plate 31.

The plate feeding device 2, the slip sheet discharging device 3, the punching device 4, the transport device 5, the exposure device 6, and the plate discharging device 7, except for the dark room 13 of the plate feeding device 2, rely on a light-shielding cover 33 that can be opened and closed. Covered.

Next, the operation will be described based on such a configuration. The packed plate material A is carried to the dark room 13 of the plate feeding device 2 and is unpacked. The unpacked plate materials A are taken out of the dark room 13 with the interleaving paper B interposed therebetween,
The sheets are stacked on the table 14 of the plate feeding device 2.

The plate material A placed on the table 14 of the plate feeding device 2 is suctioned one by one from above by a suction transfer device 15 and supplied to the punching device 4. Then, the slip sheet B interposed between the plate materials A is transferred to the suction transfer device 16 of the slip sheet discharge device 3.
And is transported to the left and right sides, and then discharged by the discharge roller 17.

The plate material A supplied to the punching device 4 is placed on the table 18, and thereafter, a plurality of holes C arranged parallel to the front side are formed near the front side of the plate material A.

The rear end of the plate material A having the hole C formed thereon is pushed by the transfer body 20 of the transfer device 5, and the tables 18 and 19 are pressed.
It moves above and is conveyed to the exposure device 6.

The plate material A transported to the exposure device 6 is aligned by fitting the pins 24 of the exposure cylinder 21 into the holes C, and the front end of the plate material A is vacuum-adsorbed (not shown).
As a result, it is brought into close contact with the outer surface of the exposure cylinder 21.
Thereafter, the plate material A is spirally wound at a predetermined inclination angle θ by the rotation of the exposure cylinder 21 and the winding roller 25 in the winding direction. Finally, the plate material A is wound by the vacuum suction device. The rear end is retained. That is, the plate material A conveyed in one direction
The plate material A is spirally wound around the exposure cylinder 21 because the exposure cylinder 21 is inclined by the predetermined angle θ with respect to the exposure cylinder 21.

Thereafter, the exposing cylinder 21 is rotated in a predetermined direction by the rotating mechanism 23, and the exposing unit 22 is moved by the moving mechanism 2.
6 is moved in a predetermined direction. A drawing image signal (digital signal) is sent from the printing plate forming computer to the exposure device 22 via a drawing controller (not shown), and laser beam scanning corresponding to the drawing image signal is performed on the plate surface of the plate material A. It is done. Thus, the so-called exposure of the plate material A is performed.

The exposed plate material A is released from the holding of the rear end by the vacuum suction device, and is rotated in the rewinding direction of the exposing cylinder 21 and the winding roller 25, so that the exposing cylinder is rotated. 21 and is discharged from the exposure device 6.

The plate material A discharged from the exposure device 6 is carried by the table 27 of the plate discharge device 7 and then sent to the development processing device 8 by the plate discharge roller 28. Further, the plate material A sent to the development processing device 8 is removed by a developing solution except for a portion that has been exposed and cured by the exposure device 6, and a printing plate surface is formed. Finally, the plate surface is protected by applying a gum solution or the like.

The plate material A from the development processing device 8 is sent onto the table 29 of the direction changing device 9, where it is turned 90 °, and is carried out to the right. Further, the plate material A from the direction changing device 9 is sent to the bending device 10, where the front and rear ends of the plate material A are bent downward in a substantially V shape, thereby forming a bent portion D. As a result, a so-called printing plate is formed. Further, the printing plate from the folding device 10 is sent to a printing plate storage device 11, where it is stored in a predetermined state.

When plate making is performed using two standard width plates A1, the separating plate 30 of the guide device 12 is raised as shown in FIG. 3, and the separating plate 30 is held at the separating position. Then, on the table 14 of the plate feeding device 2, plate materials A1 having the same number of standard widths are stacked on the left and right sides of the separation plate 30. Next, a left and right standard width plate material A placed on the table 14 of the plate feeding device 2 is used.
1 are simultaneously supplied one by one to the punching device 4 by the suction transfer device 15 of the plate feeding device 2. Also, the left and right standard width slip sheets B1 interposed between the standard width plate materials A1 are distributed to the left and right by the left and right suction transfer devices 16 and the discharge rollers 17 of the slip sheet discharge device 3 and discharged. .

When the left and right standard width plate materials A1 are sent to the punching device 4, the exposing device 6 and the developing device 8, the left and right pushing members 32 of the guide device 12 are operated inward.
The left and right standard width plate materials A1 are brought into contact with the separation plate 30 and fed along the separation plate 30. The separation plate 30 of the guide device 12 provided in the direction changing device 9 is held at the retracted position when the left and right standard width plate materials A1 are sent to the folding device 10, and the left standard width plate material A1 is moved. , So as not to be interfered by the separation plate 30 of the guide device 12.

When making a double-width plate material A2,
As shown in FIG. 4, the separation plate 30 of the guide device 12 is lowered, and the separation plate 30 is held at the retracted position. The double-width plate material A2 is placed on the table 14 of the plate feeding device 2 on the left side of the guide plate 31 in a stacked state. Next, the double-width plate material A2 placed on the table 14 of the plate feeding device 2
Is supplied to the perforation device 4 by the suction transfer device 15. Also, the double-width interleaf B2 interposed between the double-width plate materials A2
Is discharged in the same direction by operating only one of the suction transfer device 16 and the discharge roller 17 of the slip sheet discharge device 3.

When one double-width plate material A2 is sent to the punching device 4, the exposing device 6 and the developing device 8, the guide device 1
When the left pusher 32 of FIG. 2 is actuated to the right, one double-width plate material A2 is brought into contact with the guide plate 31 and is fed along the same. Since the separation plate 30 of the guide device 12 is held at the retracted position, this does not interfere.

The exposure apparatus 6 is, in the above example, an exposure unit 22.
However, the present invention is not limited to this, and may be, for example, two or more. If the number is plural, the exposure time can be shortened.
Further, in the above example, the separation plate 30 of the guide device 12 is in the separation position when ascending and the retracted position when ascending, but is not limited thereto. The descending time of the contact may be the separation position.

The guide plate 31 of the guide device 12 is fixed to the table in the above example. However, the present invention is not limited to this. For example, when the guide plate 31 is provided on one pushing body 32 and the double-width plate material A2 is handled. May make this a stationary state, thereby guiding the double-width plate material A2. Further, in the above example, the standard width plate material A1 has a size of two newspapers in which two newspapers are vertically connected, but is not limited thereto. May be of the same size. Further, the double-width plate material A2 has a size of four newspaper pages in the above example, but is not limited to this. For example, two newspaper pages in which half of the two newspaper pages are connected side by side It may be of the size of a minute.

[0056]

As described above, according to the present invention,
The following excellent effects can be obtained. (1) The printing plate-making device is composed of a plate feeding device, an exposure device, a development processing device, and a guide device, and the exposure cylinder of the exposure device is inclined at a predetermined angle θ with respect to a direction perpendicular to the direction of travel of the plate material. It is arranged so that the plate material that has been advanced is naturally spirally wound around the exposure cylinder. As a result, the plate material is automatically wound spirally around the exposure cylinder without changing the direction of travel of the plate material in front of the exposure cylinder as in the prior invention, and the transport mechanism of the plate material is changed. The simplification can be greatly simplified, and high-speed and efficient plate making becomes possible. (2) Further, a guide device for guiding two standard width plate materials or one double width plate material conveyed from the plate feeding device to the development processing device via the exposure device is provided. As a result, the plate material having the standard width and the plate material having the double width can be properly and efficiently made at a high speed. (3) If the plate feeding device is equipped with a slip sheet discharge device that discharges the slip sheet to the side, the slip sheet can be automatically discharged mechanically without the involvement of workers, so that work efficiency can be improved. Can be. (4) In the case where a plurality of pins are protruded from the exposure cylinder and are engaged with the holes C formed in the front end of the plate material,
The plate material is automatically and reliably spirally wound around the exposure cylinder. As a result, a high-speed and high-precision exposure operation can be performed, and a printing plate enabling high-quality printing can be formed with high efficiency. (5) When a perforation device for forming a hole is provided at a position preceding the exposure device, a hole can be formed in the plate material before exposure, and the plate material can be securely wound around the exposure cylinder. By utilizing these holes, the printing plate can be accurately mounted on the plate cylinder of a rotary printing press, and a plurality of (four) plate materials can be easily aligned for color printing or the like. (6) A vertically movable separating plate in which the guide device can be located between two standard-width printing plates and separated from each other, and a retractable position that does not interfere with one double-width printing plate. When,
Consists of a guide plate that guides one side of one double-width plate, and a pusher that pushes two standard-width plates toward the separation plate and pushes one double-width plate toward the guide plate. In this case, two standard-width plate materials or one double-width plate material can be accurately guided, and one of the pushers can also be used, thus simplifying the structure and reducing costs. Can be planned.

[Brief description of the drawings]

FIG. 1 is a plan view showing an outline of a newspaper printing plate making apparatus according to the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an explanatory diagram illustrating a process of making a plate of two standard widths.

FIG. 4 is an explanatory view illustrating a process of making a double-width plate material.

FIG. 5 is an explanatory diagram showing an engagement state between a pin provided on an exposure cylinder and a hole formed in a plate material.

FIG. 6 is an explanatory view showing an example of a conventional drum type plate laser exposure apparatus.

FIG. 7 is an explanatory diagram of a state of forming a recorded image by the conventional laser exposure apparatus of FIG. 6;

FIG. 8 is an explanatory diagram of a state of forming a recorded image by another conventional drum type laser exposure apparatus (intermittent stop type).

FIG. 9 is an explanatory view of a drum type laser exposure apparatus according to Japanese Patent Application No. 8-293494.

10 is an explanatory diagram of a state of forming a recorded image when the moving direction of the optical bench is inclined at an angle θ with respect to the axis g of the drum in the exposure apparatus of FIG. 9;

11 is an explanatory diagram of a state of changing the transport direction of the plate material required for spirally winding the plate material around the exposure drum in the exposure apparatus of FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate making apparatus for newspaper printing, 2 ... Plate feeding apparatus, 3 ... Interleaf paper discharging apparatus, 4 ... Perforating apparatus, 5 ... Transport apparatus, 6 ... Exposure apparatus, 7
... plate discharging device, 8 ... developing device, 9 ... direction changing device, 1
0: bending device, 11: printing plate storage device, 12: guide device,
13 dark room, 14, 18, 19, 27, 29 table, 15, 16 suction transfer device, 17 discharge roller, 20
... Conveyor, 21 ... Exposure cylinder, 22 ... Exposure device, 23 ... Rotating mechanism, 24 ... Pin, 25 ... Winding roller, 26 ... Movement mechanism,
28: plate discharging roller, 30: separating plate, 31: guide plate, 32
... Pushing body, 33 ... Light-shielding cover, A: Plate material, A1: Standard width plate material, A2: Double width plate material, B: Interleaf paper, B1: Standard width interleaf paper, B2 ... Double width interleaf paper , C: hole, D: bent portion, θ: predetermined angle, g: axis of drum.

Claims (5)

(57) [Claims] 1. A plate feeding device for supplying a plate material, an exposure cylinder arranged at a predetermined angle θ with respect to a direction perpendicular to the direction of travel of the plate material, and having a plate material wound spirally,
An exposure device for exposing a plate material wound on an exposure cylinder, an exposure device for exposing the plate material from the plate supply device, a development processing device for developing the plate material from the exposure device, and a plate supply A plate making apparatus for newspaper printing, comprising: a guide device capable of guiding two standard width plate materials or one double width plate material conveyed from the apparatus to a development processing apparatus via an exposure apparatus. 2. The printing plate making apparatus according to claim 1, wherein the plate feeding device is a plate feeding device including a slip sheet discharging device for discharging the slip sheet to the side. 3. An exposure apparatus comprising: a plurality of pins projecting in a line on a straight line inclined at an angle θ with respect to a center axis of an exposure cylinder;
2. The plate making apparatus for newspaper printing according to claim 1, wherein the pin is engaged with a hole C formed in a front end portion of the plate material to wind the plate material around an exposure cylinder in a spiral manner. 4. The plate making apparatus for newspaper printing according to claim 1, wherein a perforation device for forming a hole at a front end of the plate material is provided at a position before the exposure apparatus. 5. A vertically movable separation device in which a guide device is located between two standard-width printing plates and has a separation position for separating them and a retracted position which does not interfere with one double-width printing plate. Plate, a guide plate for guiding one side of one double-width plate, and two standard-width plates can be pushed to the separation plate side, and one of them can hold one double-width plate. 2. The plate making apparatus for newspaper printing according to claim 1, wherein the guide means comprises left and right pushing members which can be pushed toward the guide plate.