JP3447926B2 - Printing plate holding mechanism of printing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate holding mechanism for a printing device.

[0002]

2. Description of the Related Art In such a printing plate holding mechanism,
Conventionally, the end of a printing plate to be mounted on the outer periphery of the plate cylinder is clamped by a nail seat arranged on the plate cylinder and a claw capable of abutting on the nail seat, whereby the printing plate of the plate cylinder is held. It is attached to the outer circumference.
When the printing plate is mounted on the outer periphery of the plate cylinder, the operator operates a claw opening / closing mechanism having a cam mechanism so that the claw and the claw seat clamp the end of the printing plate.

When the printing plate feeder automatically supplies the printing plate to the plate cylinder, a cam mechanism is provided by an actuator such as an air cylinder in order to automate the mounting operation of the printing plate. The pawl opening / closing mechanism is driven to selectively position the pawl at a holding position where the pawl and the pawl seat contact and a release position where the pawl is separated from the pawl coordinate plane.

[0004]

For example, a printing plate supply device automatically supplies a printing plate to be used for printing to the plate cylinder, and a printing plate discharging device supplies the printing plate used for printing to the plate cylinder. In a printing apparatus having an automatic printing plate feeding / discharging mechanism that automatically discharges a printing plate from a printing plate, the position where the printing plate is fed to the printing drum and the position where the printing plate is discharged from the printing drum are different. Therefore, in such a printing apparatus, it is necessary to open and close the claws of the printing plate holding mechanism at two different angular positions.

At this time, a claw opening / closing mechanism having an actuator such as an air cylinder is arranged around the plate cylinder, and in order to drive the claws to open / close by the actuator of the claw opening / closing mechanism, the claw opening / closing mechanism is used as a printing plate. It is necessary to dispose two sets corresponding to the supply position and the discharge position of, which complicates the apparatus.

On the other hand, when the claw opening / closing mechanism having an actuator such as an air cylinder is arranged on the plate cylinder, the plate cylinder itself becomes large and heavy, and it is larger because it rotates at high speed during printing. The need arises to use a motor with an output.

The present invention has been made to solve the above problems, and provides a printing plate holding mechanism of a printing apparatus capable of opening and closing the claw at two different angular positions with a simple structure. The purpose is to do.

[0008]

According to a first aspect of the present invention, there is provided a printing plate holding mechanism of a printing apparatus for holding an end portion of a printing plate to be mounted on an outer peripheral portion of the plate cylinder. A lever having a pawl seat arranged near the surface and first and second arms extending in mutually different directions and swingable around an axis arranged on the plate cylinder; and a lever of the lever. 1
A claw disposed on the arm side of the claw and swingable between a holding position abutting on the surface of the claw seat and a release position separated from the surface of the claw seat in accordance with the swing motion of the lever, Energizing means for urging the lever in a direction in which the pawl comes into contact with the surface of the pawl seat, and a towing unit arranged near the plate cylinder for towing the tip of the first arm of the lever. And a reciprocating driving means having a pressing portion for pressing the tip end portion of the second arm of the lever in its reciprocating movement portion, and pulling the tip end of the first arm by the pulling portion. Causes the plate cylinder to be placed in the first angular position
In this state , by moving the claw to the release position and pressing the tip of the second arm with the pressing portion, the plate cylinder has a second angle different from the first angular position. It is characterized in that the pawl is moved to the release position in the state of being arranged in the position.

According to a second aspect of the present invention, in a printing plate holding mechanism of a printing apparatus for holding an end of a printing plate to be mounted on the outer peripheral portion of a plate cylinder, printing is performed by the printing plate held on the outer peripheral portion. And a plate cylinder capable of reciprocating between a printing position for carrying out the printing plate and a mounting and demounting position of the printing plate for mounting and demounting the printing plate on the outer periphery thereof, and a nail seat arranged near the surface of the plate cylinder, A lever having first and second arms extending in different directions and swingable around an axis arranged on the plate cylinder, and a lever arranged on the first arm side of the lever, A claw capable of swinging between a holding position in contact with the surface of the claw seat and a release position separated from the surface of the claw seat in accordance with the swinging motion, and the lever for the claw to move the surface of the claw seat. The urging means for urging in the direction of abutting against the plate cylinder, and And a reciprocating drive means having a reciprocating portion having a towing portion for pulling the tip of the first arm of the lever and a pushing portion for pushing the tip of the second arm of the lever. Having, by pulling the tip of the first arm by the towing unit,
The pawl is moved to the release position in a state where the plate cylinder is arranged at the first angular position, and the second portion is moved by the pressing portion.
The plate cylinder is placed at a second angular position different from the first angular position by pressing the tip of the arm of the plate.
In the state , the claw is moved to the release position.

According to a third aspect of the present invention, in a printing plate holding mechanism of a printing apparatus for holding an end of a printing plate to be mounted on an outer peripheral portion of a plate cylinder, printing is performed by the printing plate held on the outer peripheral portion. Printing with a first plate cylinder that can reciprocate between a first printing position for performing printing and a printing plate attachment / detachment position for attaching / detaching a printing plate to / from the outer peripheral portion thereof, and a printing plate held on the outer peripheral portion. A second printing cylinder that can reciprocate between a second printing position for performing the printing and the attachment / detachment position, and a first pawl seat provided near the surface of the first printing cylinder are different from each other. A first lever having first and second arms extending in a direction and swingable around an axis provided on the first plate cylinder, and a first arm side of the first lever. And a front side of the first claw seat that is in contact with the surface of the first pawl seat when the first lever is swung. A first pawl capable of swinging between a release position separated from the surface of the first pawl seat and a direction in which the first pawl contacts the surface of the first pawl seat with the first lever; The second plate cylinder, a second pawl seat disposed near the surface of the second plate cylinder, and first and second arms extending in mutually different directions. A second lever, which is swingable around an axis disposed on the plate cylinder, and a second arm, which is disposed on the side of the first arm of the second lever, and which swings with the second lever, The second pawl that can be swung between a holding position that abuts the surface of the second pawl seat and a release position that is separated from the surface of the second pawl seat, and the second lever are the second pawl. Is provided near the first plate cylinder or the second plate cylinder that has moved to the attachment / detachment position. A pulling part for pulling the tip of the first arm of the first lever or the second lever, and a push for pushing the tip of the second arm of the first lever or the second lever And a reciprocating drive means having a reciprocating part in its reciprocating part, and the first pulling part pulls the tip of the first arm of the first lever or the second lever .
One plate cylinder or a second plate cylinder is arranged in a first angular position
In the closed state , the first claw or the second claw is moved to the release position, and the tip of the second arm of the first lever or the second lever is pressed by the pressing portion . shape 1 of the plate cylinder or the second plate cylinder is arranged in a different second angular position from said first angular position
In the state , the first claw or the second claw is moved to the release position.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a printing apparatus to which a printing plate holding mechanism according to the present invention is applied.

This printing apparatus includes first and second plate cylinders 11,
After the image is recorded on a printing plate on which the image held on 12 is not recorded and the plate is made, the ink supplied to the printing plate is transferred to the impression cylinder 15 through the first and second blanket cylinders 13 and 14. Printing is performed by transferring to the printing paper held.

This printing apparatus includes a first plate cylinder 11 movable between a first printing position shown by a solid line in FIG. 1 and an image recording position shown by a chain double-dashed line, and a first plate cylinder shown by a solid line in FIG. The second plate cylinder 12 is movable between two printing positions and the image recording position.

As will be described later, according to this printing apparatus, an image recording apparatus and a developing processing apparatus used in the plate making process of the printing plate and an ink supply apparatus and a dampening water supply apparatus used in the printing process. And the like can be arranged at different positions that do not interfere with each other, and the degree of freedom of the arrangement relationship can be improved. Further, since an image can be recorded on the printing plates held by the first and second plate cylinders 11 and 12 using a single image recording device, the device can be simplified and the entire device can be realized. The price of can be lowered.

The first plate cylinder 11 moved to the first printing position
Around the periphery of the ink, an ink supply device 20a for supplying, for example, black (K) ink to the printing plate, an ink supply device 20b for supplying, for example, magenta (M) ink to the printing plate, and a printing plate Damping water supply devices 21a and 21b for supplying dampening water are arranged. Further, around the second plate cylinder 12 that has moved to the second printing position, an ink supply device 20c for supplying, for example, cyan (C) ink to the printing plate, and for example, yellow (Y) to the printing plate.
An ink supply device 20d for supplying the ink, and a dampening water supply device 21c for supplying the dampening water to the printing plate,
21d and are arranged. Further, around the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position, the plate supply section 23, the plate discharge section 24, and the image recording device 25.
And a development processing device 26 are arranged.

In this printing apparatus, the first blanket cylinder 13 is provided so as to be able to contact the first plate cylinder 11, and the second blanket is provided so as to be contactable with the second plate cylinder 12. The impression cylinder 1 provided so as to be able to contact the cylinder 14 and the first and second blanket cylinders 13 and 14 at different positions.
5, a paper feed cylinder 16 for passing the print paper supplied from the paper feed unit 27 to the impression cylinder 15, and a chain 1 for discharging the printed print paper received from the impression cylinder 15 to the paper discharge unit 28.
Paper discharge cylinder 17 around which 9 is wound, and blanket cleaning device 29
Have and.

The first and second plate cylinders 11 and 12 are connected to first and second plate cylinder moving mechanisms 31 and 32, respectively, which will be described later, and the first and second plate cylinder moving mechanisms are respectively connected. 31, 3
The drive of 2 reciprocates between the above-described first or second printing position and the image recording position.

Further, as will be described later, gears 51 arranged concentrically with the first and second plate cylinders 11 are attached to the sides of the first and second plate cylinders 11, respectively. Further, gears 52 arranged concentrically with the first and second blanket cylinders 13 and 14 are attached to the sides of the first and second blanket cylinders 13 and 14, respectively. Then, when the first plate cylinder 11 is moved to the first printing position, the first plate cylinder 1
The gear 51 attached to No. 1 and the gear 52 attached to the first blanket cylinder 13 are configured to mesh with each other. Similarly, when the second plate cylinder 12 is moved to the second printing position, the gear 51 attached to the second plate cylinder 12 and the gear 52 attached to the second blanket cylinder 14 are also shown.
And are configured to mesh with each other.

Therefore, the first plate cylinder 11 rotates in synchronization with the first blanket cylinder 13 at the first printing position. Similarly, the second plate cylinder 12 rotates in synchronization with the second blanket cylinder 14 in the second printing position.

Further, a traction type plate cylinder rotating mechanism 30 described later is disposed near the image recording position, and both the first and second plate cylinders 11 and 12 are moved to the image recording position. In this state, the plate cylinder rotating mechanism 30
Driven to rotate.

FIG. 2 is a front view of the above-described first and second plate cylinder moving mechanisms 31, 32, and FIG. 3 is a side sectional view showing the vicinity of the bearing portion 33 in the first plate cylinder moving mechanism 31. . Since the first and second plate cylinder moving mechanisms 31 and 32 have the same configuration that is symmetrical to each other, the same members are common to the first and second plate cylinder moving mechanisms 31 and 32. The symbol is attached.

The first and second plate cylinder moving mechanisms 31, 32 are
In order to move the bearing portion 33 including the pair of bearings 34 that pivotally support the support shafts 36 of the first and second plate cylinders 11 and 12, the side plate 37 has a slot 38 (see FIG. In FIG. 2, only the slot 38 is shown, and the side plate 37 is omitted in the drawing). The bearing portion 33 is connected to a slide holder 41 that can move along the guide member 39. Further, a nut 42 is arranged on the slide holder 41. The nut 42 is screwed with a ball screw 44 connected to the drive shaft of the motor 35.

Therefore, the first plate cylinder 11 has the motor 35.
Driven by, it can be moved together with the slide holder 41. The first plate cylinder 11 has a guide member 39.
And along the ball screw 44, in solid line in FIG.
In addition, in FIG. 2, a first printing position indicated by a two-dot chain line,
It moves between the image recording position indicated by the chain double-dashed line in FIG. 1 and the solid line in FIG. Similarly, the second plate cylinder 12 drives the motor 35 to drive the slide holder 41.
It is possible to move with it. And the second plate cylinder 1
2 along the guide member 39 and the ball screw 44,
A second printing position indicated by a solid line in FIGS. 1 and 2,
It moves between the image recording position indicated by the chain double-dashed line in FIG. 1 and the solid line in FIG.

A fixing member 43 for fixing the bearing portion 33 is arranged near the first and second printing positions on the side plate 37. The first plate cylinder 11 is positioned and fixed at the first printing position by the fixing member 43, and the second plate cylinder 12 is positioned and fixed at the second printing position by the fixing member 43.

The first and second plate cylinders 11 and 12 are respectively provided with
First and second by the first and second plate cylinder moving mechanisms 31, 32
When moving the plate cylinders 11 and 12 of the first and second plate cylinders 1,
A rotation prevention mechanism, which will be described later, for preventing the rotation of the first and the second rotations 12 is provided.

The reason why the rotation prevention mechanism is used to prevent the rotation of the first and second plate cylinders 11 and 12 is as follows. That is, when the rotational positional relationship between the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14 and other members is deviated, the printing misalignment and the inter-part displacement are performed. This positional relationship needs to be always constant, because the problem of collision of 2) occurs. At this time, when an image is recorded on the printing plates held by the first and second plate cylinders 11 and 12 at the image recording position by the image recording device 25 described later, the first and second plates are printed. The rotational angle positions of the barrels 11 and 12 are monitored by a photo coupler 87, a rotary encoder, etc., which will be described later. However, when moving from the image recording position to the first and second printing positions, the first and second plate cylinders 11 and 12 are rotated, and the first and second plate cylinders 1 and 2 are rotated.
The rotational positional relationship between the first and the second blanket cylinders 13 and 14 and the like may deviate from each other. Therefore, the rotation prevention mechanism is used to make the first and second plate cylinders 1
First and second plate cylinders 11 and 12 when moving 1 and 12
It prevents the rotation of.

This rotation prevention mechanism is provided in the first and second plate cylinders 1
A disk-shaped rotary plate 46, which is connected to the support shafts 1 and 12 and has a cutout portion in a part of its outer periphery, and the rotation of the rotary plate 46 is restricted by engaging with the cutout portion of the rotary plate 46. The anti-rotation member 47 and a release member respectively disposed near the first and second printing positions for releasing the engagement of the anti-rotation member 47 with the cutout portion of the rotary plate 46 at the first and second printing positions. 48 and a releasing member 49 disposed near the image recording position for releasing the engagement of the rotation preventing member 47 with the cutout portion of the rotary plate 46 at the image recording position.

FIG. 4 shows a rotation preventing member 47 arranged on the first plate cylinder 11 and a releasing member 4 arranged on the first printing position.
8 is a schematic diagram showing a relationship with FIG. This rotation prevention member 47
Is a lever 54 swingable around a shaft 53 arranged in the bearing portion 33, an engagement pin 55 provided upright on the front surface side of the lever 54, and a rear surface of the engagement pin 55 with respect to the lever 54. Side guide pin 56 and the guide pin 5 with respect to the shaft 53
6 is provided with a pressing pin 57 disposed on the opposite side, and a spring 58 for rocking the lever 54 to urge the engaging pin 55 toward the rotating plate 46. On the other hand, the release member 48 is
It is composed of a cam member having an inclined surface 59 for guiding the guide pin 56.

A rotation preventing member 47 similar to the above is also arranged on the second plate cylinder 12, and a releasing member 48 similar to the above is also arranged at the second printing position.

On the other hand, FIG. 7 is a schematic diagram showing the relationship between the rotation preventing member 47 and the releasing member 49 arranged at the image recording position when the first plate cylinder 11 is moved to the image recording position. The releasing member 49 is used as the pressing pin 5 of the rotation preventing member 47 in the first plate cylinder 11 that has moved to the image recording position.
A pressing plate 62 for reciprocally moving by an air cylinder 61 for pressing the 7 downward is provided.

When the second plate cylinder 12 moves to the image recording position, the pressing pin 57 of the anti-rotation member 47 arranged on the second plate cylinder 12 is moved by the pressing plate 62 of the releasing member 49. Pressed.

FIG. 8 is a front view of the vicinity of the plate cylinder rotating mechanism 30 described above, and FIG. 9 is a side sectional view showing the main part thereof.
The plate cylinder rotating mechanism 30 is provided with the first,
For rotating the second plate cylinders 11 and 12,
The first and second plate cylinders 11 and 12 are arranged on the opposite side of the rotation preventing mechanism described above. Note that, in FIG. 9, the transmission rotor 78, its moving mechanism and the like are omitted.

The plate cylinder rotating mechanism 30 is connected to the drive roller 76 which is rotated by the drive of the motor 75 and the support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12 so that the first plate is rotated. First and second driven rollers 77 arranged concentrically with the cylinder 11 or the second plate cylinder 12, and from the drive roller 76 concentric with the first plate cylinder 11 or the second plate cylinder 12. And a transmission roller 78 for transmitting drive to one of the first and second driven rollers 77 (hereinafter, simply referred to as "driven roller 77").

The lower end portion of the driving roller 76 has an oil pan 7
It is immersed in the oil stored in No. 9. Further, the driven roller 77 is concentric with the first plate cylinder 11 or the second plate cylinder 12 via the support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12 as described above. It is arranged and rotates in synchronization with the first plate cylinder 11 or the second plate cylinder 12. Further, the transmission roller 78 is rotatably supported by a cylinder rod tip end portion of an air cylinder 80 whose base end portion is swingably connected to a support member 91 via a shaft 92, and the air cylinder 80 is driven. With this, it is possible to move between a drive transmission position in which both the drive roller 76 and the driven roller 77 are in pressure contact with each other and a retracted position in which the drive roller 76 and the driven roller 77 are separated from the surface.

Therefore, by rotating the drive roller 76 at a constant speed by driving the motor 75 while moving the drive roller 78 to the drive transmission position, the rotation of the drive roller 76 is transmitted through the drive roller 78. Driven roller 7
7 and the first plate cylinder 11 rotates at a constant speed.
At this time, the driving force of the motor 75 is equal to the driving roller 76.
Since it is transmitted to the first plate cylinder 11 or the second plate cylinder 12 by the traction-type drive transmission mechanism that uses the frictional force between the driven roller 77 and the transmission roller 78, the first plate cylinder 11 Alternatively, the second plate cylinder 12 can be accurately rotated without causing uneven rotation.

At this time, in particular, in the above-described embodiment, the transmission roller 78 is movable between the drive transmission position and the retracted position, which are in pressure contact with both the drive roller 76 and the driven roller 77. After the first and second plate cylinders 11 and 12 have moved to the image recording position, the transmission roller 7
By bringing 8 into pressure contact with both the drive roller 76 and the driven roller 77, slippage does not occur between the transmission roller 78, the drive roller 76, and the driven roller 77.
The second plate cylinders 11 and 12 can be rotated accurately.

Therefore, as in the printing apparatus according to this embodiment, with the movement between the image recording positions of the first and second plate cylinders 11 and 12 and the first and second printing positions, Even if the driven roller 77 has a configuration in which the driven roller 77 moves in different directions, the transmission roller 78 is moved to the drive roller 76 and the driven roller 77 after the first and second plate cylinders 11 and 12 have moved to the image recording positions. By moving the drive roller 78 to the drive transmission position in which the transmission roller 78 and the driven roller 77 are moved to the image recording position, the transmission roller 78 can be surely pressed to the driven roller 77 moved to the image recording position. Also, the first and second plate cylinders 11 and 12 can be accurately rotated without causing slippage between the driven rollers 77.

The driven roller 77 has four positioning members 8 composed of V blocks for positioning and fixing the first and second plate cylinders 11 and 12 at predetermined angular positions.
1a, 81b, 81c, 81d are arranged. The positioning members 81a, 81b, 81c, and 81d engage the driven roller 77 by engaging with a locking pin 85 provided at the tip of a lever 84 that swings around a shaft 83 when the air cylinder 82 is driven. Through the first and second plate cylinder 1
It is used to position and fix 1 and 12 at a predetermined rotational angle position.

Further, a detection plate 86 used for detecting the rotational angle position of the driven roller 77 is erected on the driven roller 77, and the side plate 37 detects the detection plate 86. A photo coupler 87 is provided for this purpose. The rotational angle position of the driven roller 77, that is, the rotational angle positions of the first and second plate cylinders 11 and 12 are the detection signal of the detection plate 86 by the photocoupler 87, the first,
The first and second plates are connected to the support shaft 36 of the second plate cylinders 11 and 12.
It is monitored by a rotary encoder (not shown) that generates a pulse signal as the plate cylinders 11 and 12 rotate.

Further, a light shielding plate 88 is attached to the support shafts 36 of the first and second plate cylinders 11 and 12.

Next, the first by the above-mentioned rotation prevention mechanism,
Anti-rotation operation for the second plate cylinders 11 and 12, and
The rotational driving operation of the first and second plate cylinders 11 and 12 by the above-described traction type plate cylinder rotating mechanism 30 will be described. In the following description, the rotation prevention operation and the rotation driving operation for the first plate cylinder 11 will be described, but the rotation prevention operation and the rotation driving operation for the second plate cylinder 12 are also executed in the same process.

As shown in FIG. 4, the first plate cylinder 11 is
In the printing position of the first plate cylinder 11
The gear 51 arranged concentrically with and the gear 52 arranged concentrically with the first blanket cylinder 13 mesh with each other.

In this state, as shown in FIG. 5, if the first plate cylinder moving mechanism 31 starts moving the first plate cylinder 11 from the first printing position to the image recording position, the first plate is moved. The meshing between the gear 51 arranged concentrically with the cylinder 11 and the gear 52 arranged concentrically with the first blanket cylinder 13 is gradually released. Further, along with this, the rotation preventing member 4
The guide pin 56 of No. 7 slides along the inclined surface 59 of the release member 48, and the lever 54 swings around the shaft 53, whereby the engagement pin 55 starts moving into the cutout portion of the rotary plate 46. .

At this time, the gear 51 arranged concentrically with the first plate cylinder 11 and the gear 52 arranged concentrically with the first blanket cylinder 13 are not completely meshed with each other. Not released, and the first plate cylinder 1 by the rotation preventing member 47
Since the rotation of No. 1 has not been prevented yet, the first plate cylinder 11 moves toward the image recording position while rotating counterclockwise in the state shown in FIG. Therefore, it is possible to prevent the gears 51 and 52 from colliding and being damaged.

Then, as shown in FIG. 6, the first plate cylinder 1
1 further moves toward the image recording position, and the first plate cylinder 1
In a state where the gear 51 arranged coaxially with the gear 1 and the gear 52 arranged coaxially with the first blanket cylinder 13 are disengaged, the guide pin 56 of the rotation preventing member 47 is provided.
Completely disengages from the inclined surface 59 of the release member 48, and the engagement pin 55 is completely housed in the cutout portion of the rotary plate 46. Therefore, the rotation of the first plate cylinder 11 is prevented.

In this state, the first plate cylinder 11 is moved to the image recording position as shown in FIG. 7 by driving the first plate cylinder moving mechanism 31. Then, as shown in FIG. 8, the transmission roller 78 of the plate cylinder rotating mechanism 30 is driven by the air cylinder 80 to drive the driving roller 76 and the driven roller 77.
And a drive transmission position where they are pressed against each other. Then, the pressing plate 62 of the release mechanism 49 is moved from the position shown by the solid line in FIG. 7 to the position shown by the chain double-dashed line in FIG. 7 by driving the air cylinder 61. This allows
The pressing pin 57 of the rotation preventing member 47 moves downward and the lever 54 swings around the shaft 53, whereby the engagement pin 55 is disengaged from the cutout portion of the rotary plate 46.
Along with this, the first plate cylinder 11 becomes rotatable.

In this state, the first plate cylinder 11 is rotated at a low speed by the traction type plate cylinder rotating mechanism 30 and the printing plate is mounted on the first plate cylinder 11, and then the image recording device 25 is used to Record the image on the printing plate. Then, after the recording of the image on the printing plate is completed, the printing plate is developed by the developing processing unit 26. When the recording of the image on the printing plate and the developing process are completed, the first plate cylinder 11 is returned to the origin position by using the detection values of the detection plate 86, the photocoupler 87, and the like. Then, the transmission roller 78 of the plate cylinder rotating mechanism 30 is moved to the retracted position by driving the air cylinder 80, and the air cylinder 82 shown in FIG. 8 is driven to engage the positioning member 81a and the engagement pin 85. Thus, the first plate cylinder 11 is positioned and fixed at the predetermined rotation angle position via the driven roller 77.

After that, the pressing plate 6 in the release mechanism 49
2 is moved from the position shown by the chain double-dashed line in FIG. 7 to the position shown by the solid line by driving the air cylinder 61. As a result, the pressing pin 57 of the rotation preventing member 47 moves upward and the lever 54 swings around the shaft 53, so that the engagement pin 55 of the rotation preventing member 47 becomes a cutout portion of the rotating plate 46. Engage. Accordingly, the rotation of the first plate cylinder 11 is prevented. Then, the air cylinder 82 is driven to move the positioning member 81a and the engagement pin 85.
Disengage from.

Then, by driving the first plate cylinder moving mechanism 31, the first plate cylinder 11 is moved from the image recording position to the first printing position. With the movement of the first plate cylinder 11, the rotation prevention member 47 is operated by the operation opposite to the movement of the first plate cylinder 11 shown in FIGS. 4 to 6 from the first printing position to the image recording position. The engagement between the engagement pin 55 and the notch in the rotary plate 46 is released.

That is, as the first plate cylinder 11 moves from the position shown in FIG. 6 to the position shown in FIG.
The guide pin 56 of 7 slides along the inclined surface 59 of the release member 48, and the lever 54 swings around the shaft 53, so that the engagement pin 55 moves outward from the inside of the cutout portion of the rotary plate 46. To do. At the same time, the first plate cylinder 11
The meshing operation of the gear 51 arranged concentrically with the gear 52 arranged concentrically with the first blanket cylinder 13 is started.

At this time, the start of the meshing operation of the gear 51 arranged concentrically with the first plate cylinder 11 and the gear 52 arranged concentrically with the first blanket cylinder 13 is started. Accompanying
The rotation prevention of the first plate cylinder 11 by the rotation prevention member 47 is released, and the first plate cylinder 11 moves toward the first printing position while rotating clockwise in the state shown in FIG. To do. Therefore, it is possible to prevent the gears 51 and 52 from colliding and being damaged.

Then, as shown in FIG. 4, the first plate cylinder 1
When 1 returns to the first printing position, the gear 51 arranged concentrically with the first plate cylinder 11 and the first blanket cylinder 1
The gear 52 arranged concentrically with the gear No. 3 meshes perfectly.

Referring again to FIG. 1, around the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position,
As described above, the image recording device 25, the plate supply unit 23, and the plate discharge unit 24 are arranged.

FIG. 10 is a schematic side view showing the image recording device 25, the plate supply section 23 and the plate discharge section 24, and FIG. 11 is a schematic plan view of the image recording apparatus 25.

The image recording device 25 described above uses a laser in the main scanning direction for a printing plate that moves in the sub-scanning direction due to the rotation of the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position. An image is recorded by scanning the beam 89. The image recording device 25 includes a laser beam 8 as a recording beam that is modulated based on an image signal.
9, a semiconductor laser 93 that emits light 9, a cylindrical lens 94, a collimator lens 95, a polygon mirror 96 as a deflecting device, an fθ lens 97, two folding mirrors 98, these semiconductor laser 93, and the cylindrical lens 94. , A collimator lens 95, a polygon mirror 96, an fθ lens 97, and a folding mirror 98.

The laser beam 89 emitted from the semiconductor laser 93 is deflected by the action of the polygon mirror 96 to become a scanning beam directed in the main scanning direction, and scans the entire printing plate as the printing plate moves in the sub scanning direction. By
Record the desired image on the printing plate.

The plate supply section 23 described above includes a supply cassette 63 for accommodating a long roll printing plate on which an image is not recorded in a light-tight state, and a leading end of the printing plate pulled out from the supply cassette 63. A guide member 64 and a guide roller 65 for guiding the sheet to the surface of the first plate cylinder 11 or the second plate cylinder 12, and a cutter 66 for cutting a long printing plate into a sheet-shaped printing plate. Have and. Further, the plate discharging unit 24 described above is peeled by the action of the pawl mechanism 73 and the pawl mechanism 73 for peeling the printing plate held on the first plate cylinder 11 or the second plate cylinder 12 after printing is completed. And a conveyor mechanism 69 for conveying the printing plate to the discharge cassette 68 (see FIG. 1).

Further, as shown in FIG. 12, around the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position, the first plate cylinder 11 or the second plate cylinder 11 is provided with a guide member 64, as shown in FIG. The printing plate guided on the surface of the plate cylinder 12 is used as the first plate cylinder 1
A pressing roller 130 for pressing toward the outer peripheral portion of the first or second plate cylinder 12 and a pawl opening / closing mechanism 132 for driving to open / close a front end pawl mechanism 131 for nipping the front end of the printing plate.
And a rear end pawl mechanism 13 for holding the rear end of the printing plate.
A claw opening / closing mechanism 134 for driving the opening / closing of the printing plate 3 and a guide roller mechanism 135 for pressing the printing plate at the time of discharging the printing plate are arranged.

The guide member 64 and the pressing roller 130 described above are configured to move in synchronization with each other when the air cylinder 136 is driven.

That is, as shown in FIGS.
The guide member 64 is supported so as to be swingable around a shaft 137. Further, the guide member 64 is used for the air cylinder 1.
The moving plate 138 connected to the cylinder rod 36 is connected to the moving plate 138 via a link 139. Therefore, the guide member 64 is driven by the air cylinder 136 so that the leading end of the guide member 64 shown in FIGS. 13 and 14 is the first plate cylinder 11 or the second plate cylinder 11.
15 reciprocates between a guide position close to the surface of the plate cylinder 12 and a retracted position separated from the surface of the first plate cylinder 11 or the second plate cylinder 12 shown in FIG.

On the other hand, the pressing roller 130 is connected to the cylinder rod of the air cylinder 136 via the connecting member 147, and by driving the air cylinder 136, as shown in FIG.
And the standby position shown in FIG. 14 in which its tip is separated from the surface of the first plate cylinder 11 or the second plate cylinder 12, and the surface of the first plate cylinder 11 or the second plate cylinder 12 shown in FIG. It moves back and forth between adjacent pressing positions.

The above-mentioned tip claw mechanism 131 for holding the tip of the printing plate is provided on each of the first plate cylinder 11 and the second plate cylinder 12. This tip claw mechanism 131
13 to 15, as shown in FIGS. 13 to 15, the claw seat 148 disposed near the surface of the first plate cylinder 11 or the second plate cylinder 12.
And a lever that has a first arm 149 and a second arm 150 extending in mutually different directions and is swingable around a shaft 151 provided on the first plate cylinder 11 or the second plate cylinder 12. 152 and the first arm 1 of the lever 152
It has the nail | claw 153 arrange | positioned at the 49 side.

Bearings 154 and 1 are provided at the tips of the first and second arms 149 and 150 of the lever 152, respectively.
55 is attached. Further, as shown in FIG. 22, the lever 152 is a coil spring 1 arranged around the shaft 151.
56 and is urged by the coil spring 156 in the arrow direction shown in FIG. Therefore, as shown in FIG. 13, the claw 153 disposed on the first arm 149 side of the lever 152 is in a state where its tip is in contact with the claw seat 148 in a normal state.

As shown in FIGS. 13 to 15, the pawl opening / closing mechanism 132 for driving the tip pawl mechanism 131 to open / close has the first plate cylinder 11 or the second plate cylinder 1 moved to the image recording position.
2 has an air cylinder 157 disposed in the vicinity thereof and a block 159 disposed at the tip of the cylinder rod 158 of the air cylinder 157. As will be described later, the lower end portion 161 of the block 159 is provided with a second arm 15 of the lever 152 when the pawl 153 of the front end pawl mechanism 131 is moved to the release position during supply of the printing plate.
It functions as a pressing portion for pressing the bearing 155 at the 0 tip. In addition, as will be described later, the block 159 includes the lever 1 when the pawl 153 of the front end pawl mechanism 131 is moved to the release position during ejection of the printing plate.
Bearing 15 at the tip of the first arm 149 at 52
A concave portion 162 that functions as a pulling portion for pulling 4 is formed.

The trailing edge claw mechanism 133 for holding the trailing edge of the printing plate described above is provided on each of the first and second plate cylinders 11 and 12. This rear end claw mechanism 133
16 to 18, a claw seat 164 rotatable around a shaft 163 arranged on the first plate cylinder 11 or the second plate cylinder 12 and a claw seat 164 are arranged on the claw seat 164. Installed shaft 16
5, a pawl 166 rotatable around the pawl 166, a lever 169 connected to the pawl 166, and a pawl seat 164, and a coil spring 167 for biasing the pawl 166 to rotate in the counterclockwise direction shown in FIG. And the first plate cylinder 11 or the second plate cylinder 12
The first plate cylinder 11 having a spring 168 for urging the claw seat 164 to rotate clockwise and a pin 171.
Alternatively, it has a cam mechanism composed of a cam 173 rotatable around a shaft 172 arranged on the second plate cylinder 12 and a cam follower 170 connected to a claw seat 164.

The claw opening / closing mechanism 134 for driving the rear end claw mechanism 133 to open / close is, as shown in FIGS. 16 to 18, the first plate cylinder 11 or the second plate cylinder 1 moved to the image recording position.
2 has an air cylinder 174 disposed in the vicinity thereof and a contact member 176 disposed at the tip of the cylinder rod 175 of the air cylinder 174. Further, as shown in FIG. 23, at the tip of the hitting member 176, first and second pressing portions 177 having different heights with respect to the reciprocating direction of the hitting member 176 by the air cylinder 174,
178. Then, as will be described later, the first pressing portion 177 is driven by the air cylinder 174 to move the lever 16
The second pressing portion 178 comes into contact with the tip of the cam 9 and comes into contact with the pin 171 of the cam 173 by driving the air cylinder 174.

Next, the first plate cylinder 11 or the second plate cylinder 1
The mounting operation of mounting the printing plate P on the outer peripheral portion of No. 2 will be described with reference to FIGS. 13 to 18.

When the printing plate P is mounted on the first plate cylinder 11 or the second plate cylinder 12, the first plate cylinder 11 or the second plate cylinder is rotated by the traction type plate cylinder rotating mechanism 30 described above. 12, the claw 153 and the claw seat 148 in the tip claw mechanism 131 are moved to a position facing the guide member 64 and the pressing roller 130, as shown in FIG. At this time, the positioning member 81c arranged on the driven roller 77 shown in FIG. 8 moves to a position facing the engaging pin 85, and in this state, the air cylinder 82 is driven to move the positioning member 81c and the engaging pin 85. By engaging the first plate cylinder 11 via the driven roller 77.
Alternatively, the second plate cylinder 12 is positioned and fixed at the supply position for holding the front end of the printing plate P by the front end pawl mechanism 131.

Then, as shown in FIG. 14, by driving the air cylinder 157 in the claw opening / closing mechanism 132, the block 159 disposed at the tip of the cylinder rod 158 is moved to the first plate cylinder 11 or the second plate cylinder 12 so as to move the block 159. Move in the direction. As a result, the lower end portion 161 of the block 159 presses the bearing 155 at the tip of the second arm 150 of the lever 152. Therefore, the lever 152 swings in the counterclockwise direction shown in FIG. 14 against the biasing force of the coil spring 156 shown in FIG. 22, and accordingly, the lever 152 is arranged on the side of the first arm 149 of the lever 152. Claw 153 moves to a release position where it is separated from the surface of claw seat 148. The lower end 161 of the block 159 moves first.
When the contact member 181 arranged on the plate cylinder 11 or the second plate cylinder 12 comes into contact with the plate member 11, the process is stopped.

In this state, the pair of nip rollers 1
The printing plate P is pulled out from the supply cassette 63 by driving 79 (see FIG. 10). The leading end portion of the printing plate P pulled out from the supply cassette 63 is guided by the guide roller 65 and the guide member 64, and the first plate cylinder 11 or the second plate cylinder 11
The plate cylinder 12 is moved in the outer peripheral direction. The trailing edge of the printing plate P is cut by the cutter 66.

Then, as shown in FIG. 14, if the front end of the printing plate P is guided by the guide member 64 and enters between the claw 153 and the claw seat 148 of the front claw mechanism 131,
By driving the air cylinder 157, the cylinder rod 15
The block 159 arranged at the front end of the first plate cylinder 11
Alternatively, it is moved in a direction away from the second plate cylinder 12.
As a result, the lever 152 swings in the clockwise direction shown in FIG. 14 due to the biasing force of the coil spring 156 shown in FIG. 22, and along with this, the claw 153 arranged on the first arm 149 side of the lever 152. However, as in the case shown in FIG. 13, the printing plate P moves to the holding position where it comes into contact with the surface of the nail plate 148, and the front end portion of the printing plate P moves toward the front end nail mechanism 13.
Held by 1.

In this state, the air cylinder 136 is driven to move the moving plate 138 and the connecting member 147 downward. As a result, as shown in FIG. 15, the guide member 64 moves from the guide position shown in FIGS. 13 and 14 to the retracted position, and the pressing roller 130 moves from the standby position shown in FIGS. 13 and 14 to the pressing position. .

Then, the positioning cylinder 81c and the engagement pin 85 are disengaged by driving the air cylinder 82 shown in FIG. 8, and the plate cylinder rotating mechanism 30 causes the first plate cylinder 11 or the second plate cylinder 12 to move. Rotate counterclockwise. Along with the rotation of the first plate cylinder 11 or the second plate cylinder 12, the printing plate P whose front end is clamped by the front end pawl mechanism 131 is
It is spread on the first plate cylinder 11 or the second plate cylinder 12.
At this time, the pressing roller 130 moves the printing plate P onto the first plate cylinder 1.
Since the printing plate P is pressed toward the outer peripheral portion of the first or second plate cylinder 12, the printing plate P is held on the outer periphery of the first plate cylinder 11 or the second plate cylinder 12 without sagging. It can be surely spread on the section.

As described above, the air cylinder 13
The reason why the guide member 64 is moved to the retracted position and the pressing roller 130 is moved to the pressing position by driving 6 is as follows.

That is, in order to surely convey the front end of the printing plate P to the front end pawl mechanism 131, it is preferable that the front end of the guide member 64 and the front end pawl mechanism 131 are as close as possible. Further, in order to surely spread the printing plate P on the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12,
The printing plate P whose front end is held by the front end pawl mechanism 131 can be pressed from the position immediately after the front end pawl mechanism 131 toward the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12. preferable. Therefore, the guide member 64 is moved to the retracted position and the pressing roller 130 is moved to the pressing position, whereby interference between the guide member 64 and the pressing roller 130 is prevented, and the printing plate P is clawed. The first plate cylinder 11 is reliably transported toward the mechanism 131 and
Alternatively, the outer circumference of the second plate cylinder 12 can be surely spread.

The printing plate P is transferred to the first plate cylinder 11 or the second plate cylinder 1 by rotating the first plate cylinder 11 or the second plate cylinder 12 by the traction type plate cylinder rotating mechanism 30.
If the rear end portion of the printing plate P is located above the rear end pawl mechanism 133 as shown in FIG.
The rotation of the plate cylinder 11 or the second plate cylinder 12 is stopped.
At this time, the positioning member 81d disposed on the driven roller 77 shown in FIG. 8 has moved to a position facing the engagement pin 85. In this state, the air cylinder 82 is driven to move the positioning member 81d and the engagement pin 85. By engaging with and, the rotation angle for holding the rear end of the printing plate P by the rear end claw mechanism 133 of the first plate cylinder 11 or the second plate cylinder 12 via the driven roller 77. Position and fix in position.

Then, the rear end pawl mechanism 133 is opened and closed by the pawl opening / closing mechanism 134 for driving the rear end pawl mechanism 133.
Is opened and closed to hold the rear end of the printing plate P by the rear end claw mechanism 133. This operation is executed as follows.

That is, when the pawl opening / closing mechanism 134 is not operated, as shown in FIG. 16, the pawl seat 164 of the rear end pawl mechanism 133 is arranged at the position rotated clockwise by the spring 168. The claw 166 is arranged at a position where its tip end portion is brought into contact with the surface of the claw seat 164 by being biased by the coil spring 167.

In this state, when the contact member 176 is moved in the direction of the first plate cylinder 11 or the second plate cylinder 12 by driving the air cylinder 174, first, in the contact member 176, as shown in FIG. Second pressing portion 17
8 presses the pin 171 of the cam 173. As a result, the cam 173 rotates about the shaft 172 and presses the cam follower 170. Therefore, the claw seat 164 is attached to the shaft 1
It rotates counterclockwise as shown in FIG.

When the contact member 176 is further moved in the direction of the first plate cylinder 11 or the second plate cylinder 12 by driving the air cylinder 174, as shown in FIG. 18, the first member of the contact member 176 is moved. The pressing portion 177 presses the tip of the lever 169 connected to the claw 166. As a result, the pawl 166 connected to the lever 169 has the shaft 165.
18 is rotated in the clockwise direction as shown in FIG. 18, and the tip of the claw 166 is arranged at a position separated from the surface of the claw seat 164. At this time, the printing plate P spread on the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12 is directed toward the surface of the first plate cylinder 11 or the second plate cylinder 12 by the pressing roller 130. Since the printing plate P is being pressed, the rear end of the printing plate P is claw 16 by the pressing action of the pressing roller 130 as shown in FIG.
6 and the claw seat 164.

When the rear end of the printing plate P does not easily enter between the claw 166 and the claw seat 164, the rear end of the printing plate P may be pressed by high pressure air or an actuator. Good.

Next, by driving the air cylinder 174,
The contact member 176 is attached to the first plate cylinder 11 or the second plate cylinder 1.
When moved in the direction away from 2, the coil spring 167
The action causes the pawl 166 to rotate in the counterclockwise direction to be in the same state as that shown in FIG. Therefore, the rear end portion of the printing plate P is held by the claw 166 and the claw seat 164.

Then, by driving the air cylinder 174, the contact member 176 is further moved in the direction away from the first plate cylinder 11 or the second plate cylinder 12, and the spring 1
By the action of 68, the claw seat 164 rotates clockwise and becomes the same state as that shown in FIG. Therefore, the printing plate P whose front end is held by the front end pawl mechanism 131 and whose rear end is sandwiched by the pawl 166 and the pawl seat 164 of the rear end pawl mechanism 133 is rotated by the pawl seat 164. Along with this, tension is applied.

Therefore, by setting the biasing force of the spring 168 to an appropriate value, the pawl seat 16 due to the action of the spring 168 is set.
By rotating the printing plate P of No. 4 in the direction of applying tension,
It is possible to apply tension to the printing plate P that can withstand printing. That is, this rear end claw mechanism 133
Will function not only as a holding mechanism for holding the printing plate P but also as a tension applying mechanism for applying tension to the printing plate P.

When the mounting of the printing plate P on the first plate cylinder 11 or the second plate cylinder 12 is completed by the above operation, the positioning member 81d and the engagement pin 8 are driven by driving the air cylinder 82.
After releasing the engagement with the first plate cylinder 11 or the second plate cylinder 12 at a low speed by driving the plate cylinder rotating mechanism 30, the first plate cylinder 11 or the first plate cylinder 11 or The surface of the printing plate P held on the outer peripheral portion of the second plate cylinder 12 is irradiated with the modulated laser beam 89 to record an image.

The printing plate P mounted on the outer peripheral portion of the first plate cylinder 11 is set by the image recording device 25 as shown in FIG.
As shown in (a), an image area 67a for printing with black ink and an image area 67b for printing with magenta ink are recorded. On the printing plate P mounted on the outer peripheral portion of the second plate cylinder 12, as shown in FIG. 24B, the image recording device 25 has an image area 67c for printing with cyan ink. , Image area 67d for printing with yellow ink is recorded. The image area 67a and the image area 67b are evenly distributed (that is, 180 degrees apart from each other) when mounted on the outer peripheral portion of the first plate cylinder 11.
Is recorded at the position. Similarly, the image area 67c and the image area 67d are recorded at positions where they are evenly distributed (that is, 180 degrees apart from each other) when mounted on the outer peripheral portion of the second plate cylinder 12. It

In the above-described embodiment, in order to simplify the structure of the first plate cylinder 11 or the second plate cylinder 12, etc., the first plate cylinder 11 or the second plate cylinder 12 is used.
Two image areas 67a, 67b or 67c, 67d are provided on one printing plate P held on the outer peripheral portion of each.
However, each of the first plate cylinder 11 and the second plate cylinder 12 has two sets of a front end pawl mechanism 131 and a rear end pawl mechanism 13.
By arranging 3, the two printing plates P may be held in each of the first plate cylinder 11 and the second plate cylinder 12. Even in this case, the image areas of the printing plates P are evenly distributed (that is, 18
2 printing plates P so that they are separated by 0 degrees)
Need to be held on the first plate cylinder 11 or the second plate cylinder 12 in a state of being evenly distributed.

Next, the first plate cylinder 11 or the second plate cylinder 1
The discharging operation of the printing plate P for discharging the printing plate P from the outer peripheral portion of No. 2 will be described with reference to FIGS.

When the printing plate P used for printing is discharged from the first plate cylinder 11 or the second plate cylinder 12,
The first plate cylinder 11 or the second plate cylinder 12 moved to the printing position by the traction type plate cylinder rotating mechanism 30 described above.
19 is rotated to the position shown in FIG.
By driving the air cylinder 157 in No. 2, the block 159 is moved toward the first plate cylinder 11 or the second plate cylinder 12. Thereafter, the plate cylinder rotating mechanism 30 slightly rotates the first plate cylinder 11 or the second plate cylinder 12 in the clockwise direction.

As a result, as shown in FIG. 20, the first arm 14 of the lever 152 of the tip end pawl mechanism 131 is removed.
The bearing 154 at the tip end of the 9 is housed in the recess 162 in the block 159.

In this state, the positioning member 81b arranged on the driven roller 77 shown in FIG. 8 has moved to a position facing the engaging pin 85, and in this state, the positioning is performed by driving the air cylinder 82. By engaging the member 81b and the engagement pin 85, the driven roller 77
The first plate cylinder 11 or the second plate cylinder 12 is positioned and fixed at the ejection position for removing the front end of the printing plate P from the front end pawl mechanism 131 via the.

Then, as shown in FIG. 21, the block 159 provided at the tip of the cylinder rod 158 is driven by driving the air cylinder 157 in the pawl opening / closing mechanism 132.
Is moved in a direction away from the first plate cylinder 11 or the second plate cylinder 12. As a result, the concave portion 162 of the block 159 is inserted into the first arm 149 of the lever 152.
Pull the bearing 154 at the tip.

Therefore, the lever 152 swings in the counterclockwise direction shown in FIG. 21 against the biasing force of the coil spring 156 shown in FIG. 22, and accordingly, the lever 152 moves toward the first arm 149 side. The arranged claw 153 is the claw seat 14
8 to the release position away from the surface. As a result, the printing plate P held by the tip claw mechanism 131 is held.
The tip of is released. The swinging of the lever 152 is performed by the contact member 18 in which the bearing 155 at the tip of the second arm 150 is arranged on the first plate cylinder 11 or the second plate cylinder 12.
It stops when it contacts 2.

Next, the guide roller mechanism 13 shown in FIG.
The guide roller 185 in FIG. 5 is moved to a position where it comes into contact with the printing plate P on the first plate cylinder 11 or the second plate cylinder 12 by driving the solenoid 186. Further, the claw portion 183 of the claw mechanism 73 is moved by the drive of the air cylinder 184 from the standby position shown by the solid line in FIG. 12 to the peeling position of the printing plate P shown by the two-dot chain line in FIG.
After the tip portion of the tip portion is separated from the tip portion pawl mechanism 131, the claw 1 of the tip portion pawl mechanism 131 is driven by driving the air cylinder 157.
53 is returned to the position where it abuts on the surface of the nail seat 148.
After that, the positioning member 81 is driven by driving the air cylinder 82.
After releasing the engagement between b and the engaging pin 85, the first plate cylinder 11 or the second plate cylinder 12 is driven by driving the plate cylinder rotating mechanism 30.
Rotate at low speed counterclockwise.

At the position where the claw portion 183 moves between the standby position and the peeling position, the claw portion 183 is the first plate cylinder 11.
A notch (not shown) is provided on the first plate cylinder 11 so as not to interfere with the surface of the first plate cylinder 11. Therefore, the operation of moving the claw portion 183 to the standby position is also performed at the same position of the first plate cylinder 11.

As a result, the front end portion of the printing plate P held on the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12 is moved to the first plate cylinder 11 or the first plate cylinder 11 by the claw portion 183 of the claw mechanism 73. After being peeled off from the outer peripheral portion of the second plate cylinder 12, it is guided on the conveyor mechanism 69 as the first plate cylinder 11 or the second plate cylinder 12 rotates. Further, the conveyor mechanism 69 is driven at the same speed as the first plate cylinder 11 or the second plate cylinder 12 by a driving device (not shown).

Then, if the trailing edge claw mechanism 133 holding the trailing edge of the printing plate P moves to a position facing the claw opening / closing mechanism 134, the first plate cylinder 11 or the second plate cylinder 12 and the conveyor. While stopping the drive with the mechanism 69, the claw 166 of the rear end claw mechanism 133 is rotated by the claw opening / closing mechanism 134, and the clamping of the printing plate P by the claw 166 and the claw seat 164 is released. At this point, the leading edge of the printing plate P is the conveyor mechanism 69.
Is inserted in a pair of opposed rollers. Therefore, after that, by restarting the driving of the conveyor mechanism 69, the printing plate P is separated from the first plate cylinder 11 or the second plate cylinder 12, and is conveyed to the discharge cassette 68 (see FIG. 1) by the conveyor mechanism 69. To be done.

Referring again to FIG. 1, as described above, the ink supply device 20a and the ink supply device 20b are provided around the first plate cylinder 11 that has moved to the first printing position. An ink supply device 20c and an ink supply device 20d are arranged around the second plate cylinder 12 that has moved to the second printing position. These ink supply devices 20a, 20
Each of b, 20c, and 20d (collectively referred to as "ink supply device 20") has a plurality of ink rollers 71 and ink fountains 72.

The ink rollers 71 of the ink supply devices 20a and 20b swing by the action of a cam or the like (not shown). By this swinging operation, the two image areas 6 formed on the printing plate P held on the outer peripheral portion of the first plate cylinder 11 are formed.
By contacting the ink roller 71 of the ink supply device 20a or 20b with any image area of 7a and 67b, the ink can be supplied only to the necessary image area. In addition, similarly, the ink supply device 20
The ink rollers 71 of c and 20d also swing by the action of a cam or the like (not shown). And by this swinging motion,
The ink roller 71 of the ink supply device 20c or 20d comes into contact with an arbitrary image area of the two image areas 67c and 67d formed on the printing plate P held on the outer peripheral portion of the second plate cylinder 12. Thus, the ink can be supplied only to the necessary image area.

Referring again to FIG. 1, the dampening water supply device 21.
a, 21b, 21c and 21d (these are collectively referred to as "fountain solution supply device 21"), before the ink is supplied to the printing plate P by the ink supply device 20,
The dampening water is supplied to the printing plate P. Of these dampening water devices 21, the dampening water supply device 21a is in the image region 67a of the printing plate P, the dampening water supply device 21b is in the image region 67b of the printing plate P, and the dampening water supply device 21c.
To the image area 67c on the printing plate P, and the dampening water supply device 21d to the image area 67d on the printing plate P, respectively.

Below the first plate cylinder 11 or the second plate cylinder 12 which has moved to the image recording position, the above-mentioned developing device 26 is arranged. The developing device 26 has a developing unit, a fixing unit, and a diaphragm unit, and is configured to be movable up and down between a standby position shown by a two-dot chain line and a developing process position shown by a solid line in FIG.

In the case of developing the printing plate P on which an image is recorded by the image recording device 25 by the developing device 26, the plate cylinder rotating mechanism 30 is driven to drive the first plate cylinder 11 or the second plate cylinder. The developing unit, the fixing unit, and the diaphragm unit are brought into contact with the printing plate P that rotates together with it.

The first and second blanket cylinders 13 and 14, which are provided so as to be able to contact the first and second plate cylinders 11 and 12,
It has the same diameter as the first and second plate cylinders 11 and 12, and a blanket for ink transfer is mounted on the outer peripheral portion thereof. Then, the first and second blanket cylinders 13 and 1
The reference numeral 4 is configured so that it can be brought into and out of contact with the first and second plate cylinders 11 and 12 and the impression cylinder 15 by a cylinder inserting mechanism described later.

FIG. 25 shows the first blanket cylinder 13 described above.
FIG. 3 is a schematic view showing the body insertion mechanism of FIG. The cylinder inserting mechanism of the second blanket cylinder 14 has the same structure as the cylinder inserting mechanism of the first plate cylinder 13 shown in FIG.

An eccentric shaft 102 whose center is different from that of the shaft 101 is connected to the side of the shaft 101 that rotatably supports the first blanket cylinder 13. Further, around the eccentric shaft 102, an eccentric bearing 103 whose center is different from that of the shafts 101 and 102 is arranged. Therefore, as shown in FIG. 25, the center of the shaft 101 (that is, the center of the first blanket cylinder 13) 104, the center 105 of the eccentric shaft 102,
The centers 106 of the eccentric bearings 103 are arranged at different positions.

The fixed plate 107 fixed to the eccentric shaft 102 and the fixed plate 108 fixed to the eccentric bearing 103 are connected by two connecting plates 111 and 112 constituting a link mechanism. The cylinder rod 114 of the air cylinder 113 is connected to the connecting portion of the two connecting plates 111 and 112.
The tip is connected. The main body of the air cylinder 113 is connected to one end of a rotating plate 116 that rotates about a shaft 115. Further, the other end of the rotating plate 116 is
It is connected to a fixed plate 118 fixed to the eccentric bearing 103 via a rod 117.

The rotating plate 116 and the shaft 120 of the eccentric member 119 are connected to each other by the two connecting plates 12 constituting the link mechanism.
1, 122 are connected. The tip end of the cylinder rod 124 of the air cylinder 123 fixed to the main body of the apparatus is connected to the connecting portion of the two connecting plates 121 and 122. Further, the worm wheel 125 connected to the eccentric member 119 is screwed with the worm gear 127 which is rotated by the drive of the motor 126.

In such a structure, when the cylinder rods 114 and 124 of the air cylinders 113 and 123 are extended, as shown in FIG. 25, the surface of the first blanket cylinder 13 and the first plate cylinder 11 are formed. And impression cylinder 1
It is separated from the surface of No. 5 by a small distance.

In this state, when the cylinder rod 114 is contracted by driving the air cylinder 113, the first blanket cylinder 13 is moved to the first blanket cylinder 13 by the action of the link mechanism by the two connecting plates 111 and 112. It moves in the direction of the plate cylinder 11 and is inserted into the first plate cylinder 11.

In this state, when the cylinder rod 124 is contracted by driving the air cylinder 123, the action of the link mechanism constituted by the two connecting plates 121, 122 and the like causes the first blanket cylinder 13 to move. It moves in the direction of the impression cylinder 15 and is put into the impression cylinder 15.
At this time, the rotating plate 116 also rotates clockwise about the shaft 115, so that the first blanket cylinder 13 is
It moves not only in five directions but also in the direction of the first plate cylinder 11. Therefore, the first plate cylinder 1 in the first blanket cylinder 13
The state of being put in 1 is maintained.

When the eccentric member 119 is rotated, the shaft 120 of the eccentric member 119 slightly moves. For this reason,
The contact pressure between the impression cylinder 15 and the first plate cylinder 11 and the first blanket cylinder 13 is adjusted by rotating the worm wheel 125 connected to the eccentric member 119 by driving the motor 126 and finely moving the shaft 120. can do.
Therefore, it is possible to adjust the printing pressure when printing using the first blanket cylinder 13.

Referring to FIG. 1 again, the blanket cleaning device 29 disposed between the first and second blanket cylinders 13 and 14 is changed from the unwinding roll to the winding roll via a plurality of pressure contact rollers. A cleaning liquid is supplied to a long cleaning cloth stretched along the route, and the cleaning cloth is brought into contact with the first and second blanket cylinders 13 and 14 and then slid to thereby The surface of the second blanket cylinders 13 and 14 is cleaned. In addition, the above cleaning cloth is applied to the impression cylinder 1
The surface of the impression cylinder 15 may also be cleaned by bringing it into contact with the surface of 5.

The impression cylinder 15 provided so as to be able to come into contact with the first and second blanket cylinders 13 and 14 is the first and second plate cylinders 1.
1, 12 and first and second blanket cylinders 13, 14
It has a diameter of 1/2 of the diameter of. Further, the impression cylinder 15 has a gripper (not shown) for holding and conveying the leading edge of the printing paper.

The paper feed cylinder 16 arranged adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper feed cylinder 16 holds the leading edge of the printing paper, which is fed one by one from the paper feed unit 27 by the reciprocating suction plate 74, by a gripper (not shown) and conveys it. The leading edge of the printing paper held by the gripper is held by the gripper of the impression cylinder 15 when the printing paper is transferred from the paper feed cylinder 16 to the impression cylinder 15.

The discharge cylinder 17 arranged adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The discharge cylinder 17 has a structure in which a pair of chains 19 are wound around both ends thereof, and grippers are arranged on connecting members (not shown) that connect the pair of chains 19. The leading edge of the printing paper held by the gripper of the impression cylinder 15 is
When transferring the printing paper from the impression cylinder 15 to the discharge cylinder 17,
It is held by one of the grippers of the paper discharge cylinder 17. Then, this printing paper is conveyed and discharged onto the paper discharge unit 28 as the chain 19 moves.

The paper feed cylinder 16 is connected to a drive motor via a belt (not shown). And the paper feed cylinder 1
6, the impression cylinder 15, the discharge cylinder 17, and the first and second blanket cylinders 13 and 14 are connected by gears attached to their ends. Further, the first blanket cylinder 13 and the first plate cylinder 11 moved to the first printing position, and the second blanket cylinder 14 and the second plate cylinder 12 moved to the second printing position, As described above, the gears 51 and 52 attached to the ends are connected to each other. Therefore, by driving a drive motor (not shown), the paper feed cylinder 16, the impression cylinder 15, the discharge cylinder 17, the first and second blanket cylinders 13 and 14, and the first and second plate cylinders 11 and 12 are , Rotate in synchronization with each other.

FIG. 26 is a block diagram showing the main electrical construction of this printing apparatus. This printing device has a ROM 141 in which an operation program necessary for controlling the device is stored.
And RAM1 in which data etc. are temporarily stored during control
42, and a control unit 140 including a CPU 143 that executes a logical operation. The control unit 140 includes an ink supply device 20, an image recording device 25, a development processing device 26, and a blanket cleaning device 2 via an interface 144.
9, first and second plate cylinder moving mechanisms 31, 32, first and second
The blanket cylinders 13 and 14 are connected to a drive circuit 145 for generating drive signals for drive units of the cylinder insertion mechanism and the claw opening / closing mechanisms 132 and 134. The printing apparatus is controlled by the control unit 140 and executes a plate making operation and a printing operation described later.

Next, plate making and printing operations by this printing apparatus will be described. FIG. 27 is a flowchart showing an outline of plate making and printing operations by this printing apparatus. The printing and plate-making operations are performed when multicolor printing is performed on the printing paper with four color inks of yellow, magenta, cyan, and black.

First, a plate-making process is performed in which an image is recorded on the printing plate P on the first and second plate cylinders 11 and 12 and a developing process is performed (step S1). This plate making process is executed according to the process shown in the flowchart of FIG. 28 as a subroutine.

That is, first, the first plate cylinder 11 is changed to the one shown in FIG.
In step S11, the plate is moved to the plate making position indicated by the chain double-dashed line. The movement of the first plate cylinder 11 is executed by driving the motor 35 of the first plate cylinder moving mechanism 31 shown in FIG. 2 to move the slide holder 41 along the guide member 39.

Next, the printing plate P is supplied to the outer periphery of the first plate cylinder 11 (step S12). The supply of this printing plate P is
As described above, the leading end of the printing plate P pulled out from the supply cassette 63 and the trailing end of the printing plate P cut by the cutter 66 are connected to the leading end pawl mechanism 131 and the rear end pawl mechanism 133.
It is executed by holding by.

Subsequently, an image is recorded on the printing plate P held on the outer periphery of the first plate cylinder 11 (step S13). This image is recorded by the plate cylinder rotating mechanism 30 of the first plate cylinder 11
Is rotated at a low speed, and the modulated laser beam 89 is applied from the image recording device 25 to the printing plate P held on the outer periphery of the first plate cylinder 11.

Next, the printing plate P on which the image is recorded is developed (step S14). In this developing process, after the developing device 26 is raised from the standby position shown by the chain double-dashed line in FIG. 1 to the developing position shown by the solid line, it is rotated together with the first plate cylinder 11 by driving the plate cylinder rotating mechanism 30. The printing plate P is executed by sequentially contacting the developing unit, the fixing unit, and the diaphragm unit.

When the developing process is completed, the first plate cylinder 1
1 is moved to the first printing position indicated by the solid line in FIG. 1 (step S15).

Subsequently, the plate making process for the printing plate P held on the outer periphery of the second plate cylinder 12 is executed by the same operation as that of steps S11 to 15 (steps S16 to 2).
0). When the plate making on the printing plate P held on the outer peripheries of the first and second plate cylinders 11 and 12 is completed, the plate making process is ended.

Referring again to FIG. 27, when the plate making process is completed, a printing process for printing on printing paper using the printing plates P on the first and second plate cylinders 11 and 12 is executed (step S2). The operation of the printing apparatus in this printing process will be described later in detail.

When the printing process is completed, the printing plate P used for printing is discharged (step S3). In order to discharge the printing plate P, first, the first plate cylinder 11 is moved to the plate making position shown by the chain double-dashed line in FIG. Then, as described above, the first cylinder 11 is rotated by the plate cylinder rotating mechanism 30.
Is rotated counterclockwise and the end of the printing plate P held on the first plate cylinder 11 is peeled off by the pawl mechanism 73, and then the printing plate P is guided by the conveyor mechanism 69 to eject the discharge cassette. Discharge into 68. After returning the first plate cylinder 11 to the first printing position, the second plate cylinder 1
The printing plate P held on the second plate cylinder 12 is discharged into the discharge cassette 68 by moving 2 from the second printing position to the plate making position and performing the same operation as described above.

When the discharging process of the printing plate P is completed, the first,
The second blanket cylinders 13 and 14 are washed (step S4). When cleaning the first and second blanket cylinders 13 and 14, the first and second blanket cylinders 13 and 14 are moved to the first and second plate cylinders 1 by the cylinder insertion mechanism shown in FIG.
After separating from 1, 12 and impression cylinder 15, first, second
The blanket cylinders 13 and 14 are rotated. In this state, the cleaning cloth supplied with the cleaning liquid in the blanket cleaning device 29 is used as the first and second blankets 13, 14
By contacting the surface of the
The second blanket cylinders 13, 14 are washed.

When the cleaning of the first and second blanket cylinders 13 and 14 is completed, it is confirmed whether or not another printing work is to be performed (step S5). When performing another printing operation, the operations of steps 1 to 4 are repeated.

When the printing operation is completed, the ink is washed (step S6). The cleaning of the ink is executed by removing and cleaning the ink adhering to the ink roller 71 and the ink fountain 72 in each ink supply device 20 by an ink cleaning device (not shown) provided in each ink supply device 20. .

When the ink washing step is completed, all steps are completed.

Next, the operation of the printing apparatus in the above printing process will be described. 29 to 34 are explanatory views showing the printing operation of this printing apparatus. In these drawings, for convenience of explanation, the length of the printing paper S and the impression cylinder 1
5, the perimeters of the paper feed cylinder 16 and the paper ejection cylinder 17 are expressed as the same, but in reality, the length of the printing paper S is the impression cylinder 15, the paper feed cylinder 16 and the paper ejection cylinder. It is shorter than the circumference of 17.

The printing operation described below is for performing multicolor printing on the printing paper with four color inks of yellow, magenta, cyan and black, as described above. Further, in FIGS. 29 to 34, for convenience of explanation,
The area K on the side of the first plate cylinder 11 and the first blanket cylinder 13 used for printing black ink is denoted by K.
Of the first plate cylinder 11 and the first blanket cylinder 13 on the side to be used for printing magenta ink, and the second plate cylinder 12 and the second plate cylinder 12. The area C of the blanket cylinder 14 on the side used for printing cyan ink is marked with C, and the area of the second plate cylinder 12 and the second blanket cylinder 14 on the side used for printing yellow ink. The reference numeral Y is attached to the region.

In the plate making process prior to the printing process, as described above, the printing plate P mounted on the outer peripheral portion of the first plate cylinder 11 has a black ink as shown in FIG. 24 (a). An image area 67a for printing with and an image area 67b for printing with magenta ink are recorded, and the printing plate P mounted on the outer peripheral portion of the second plate cylinder 12 has As shown in FIG. 24 (b), an image area 67c for printing with cyan ink and an image area 67d for printing with yellow ink are recorded.

In addition, as described above, the ink supply device 2
24, black ink is supplied to 0a, magenta ink is supplied to the ink supply device 20b, cyan ink is supplied to the ink supply device 20c, and yellow ink is supplied to the ink supply device 20d. In the image area 67a of the printing plate P, black ink is supplied from the ink supply device 20a, in the image area 67b, magenta ink is supplied from the ink supply device 20b, and in the image area 67c, cyan ink is supplied from the ink supply device 20c. , Image area 67
The yellow ink from the ink supply device 20d,
Be prepared to be supplied respectively.

First, each dampening water supply device 21 and each ink supply device 20 are brought into contact with only the corresponding image areas of the printing plates P held on the first and second plate cylinders 11 and 12. . As a result, each of the image areas 67a, 67b, 67
The corresponding dampening water supply devices 21a and 21c
While dampening water is supplied from b, 21c and 21d,
From the ink supply device 20a to the image area 67a, from the ink supply device 20b to the image area 67b, the image area 67
c to the ink supply device 20c, and the image area 67d to the ink supply device 20d from black, magenta,
Cyan and yellow inks are supplied. Then, this ink is transferred to the corresponding regions of the first and second blanket cylinders 13 and 14.

By repeating this operation, ink is supplied to the printing plate P on the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14.
This ink supply operation is repeatedly executed until the printing process is completed.

Printing plates P on the first and second plate cylinders 11 and 12.
When the supply of the ink to the first and second blanket cylinders 13 and 14 is completed, the printing paper S is supplied to the paper feed cylinder 16 as shown in FIG. The printing paper S is passed from the paper feed cylinder 16 to the impression cylinder 15.

Then, the impression cylinder 15 rotates further, and the impression cylinder 1
When the leading edge of the printing paper S held on the outer periphery of the first sheet 5 moves to a position facing the first blanket cylinder 13, the first blanket cylinder 1 is moved by the action of the cylinder insertion mechanism shown in FIG.
3 is brought into contact with the impression cylinder 15 in a cylinder-inserted state. In this state, as shown in FIG. 30, the leading end of the printing paper S comes into contact with the end of the region on the surface of the first blanket cylinder 13 on the side used for printing black ink.
The black ink is transferred from the image area 67a of the printing plate P held by the first plate cylinder 11 to the area on the surface of the first blanket cylinder 13 used for printing the black ink. There is. Therefore, the first
By further rotating the blanket cylinder 13 and the impression cylinder 15, the black ink is transferred onto the printing paper S.

If the impression cylinder 15 further rotates and the leading edge of the printing paper S held on the outer circumference of the impression cylinder 15 moves to a position facing the second blanket cylinder 14, the operation of the cylinder inserting mechanism shown in FIG. As a result, the second blanket cylinder 14 is brought into a cylinder insertion state in which the second blanket cylinder 14 contacts the impression cylinder 15. In this state, as shown in FIG. 31, the leading edge of the printing paper S is not
The blanket cylinder 14 is brought into contact with the end of the area on the surface used for printing cyan ink. Then, the cyan ink is transferred from the image area 67c of the printing plate P held by the second plate cylinder 12 to the area of the surface of the second blanket cylinder 14 used for printing the cyan ink. There is. Therefore, by further rotating the second blanket cylinder 14 and the impression cylinder 15, cyan ink is further transferred to the printing paper S on which black ink has already been transferred.

In this state, the impression cylinder 15 moves the first and second cylinders.
Continuing to rotate with the blanket cylinders 13 and 14
As shown in FIG. 32, the printing paper S is completely wound around the outer periphery of the impression cylinder 15. Since the impression cylinder 15 has a diameter that is half that of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14, the impression cylinder 15 is wound around the outer circumference of the impression cylinder 15. In the second rotation, the printed printing paper S comes into contact with the area of the surface of the first blanket cylinder 13 on the side used for printing magenta ink.
The magenta ink is transferred from the image area 67b of the printing plate P held by the first plate cylinder 11 to the area of the surface of the first blanket cylinder 13 used for printing the magenta ink. There is. Therefore, the first
By further rotating the blanket cylinder 13 and the impression cylinder 15, the magenta ink is further transferred to the printing paper S on which the black and cyan inks have already been transferred.

When the impression cylinder 15 further rotates, the printing paper S comes into contact with the end of the area of the surface of the second blanket cylinder 14 on the side used for printing the yellow ink. And, in the area on the side used for printing the yellow ink on the surface of the second blanket cylinder 14,
The yellow ink is transferred from the image area 67d on the printing plate P held by the second plate cylinder 12. Therefore, when the second blanket cylinder 14 and the impression cylinder 15 are further rotated, the yellow ink is further transferred to the printing paper S on which the black, cyan, and magenta inks have already been transferred, and the four-color printing is performed. Is completed.

As shown in FIG. 33, the leading end of the printing paper S on which the four colors have been printed is transferred from the impression cylinder 15 to the paper ejection cylinder 17. Further, after the printing paper S to be printed next is supplied to the paper feed cylinder 16, it is passed from the paper feed cylinder 16 to the impression cylinder 15.

Then, the printing paper S on which the four colors have been printed
As shown in FIG. 34, by driving the pair of chains 19, the paper is conveyed and discharged onto the paper discharge unit 28 together with the grippers of the paper discharge cylinder 17.

As described above, in this printing apparatus, the impression cylinder 15 has a diameter half that of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14. Therefore, the impression cylinder 15 rotates twice while the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14 rotate once. The printing paper S held on the outer peripheral portion of the impression cylinder 15 while the impression cylinder 15 rotates twice.
The four colors of yellow, magenta, cyan, and black are printed on. Therefore, by supplying new printing paper S from the paper feed cylinder 16 every time the impression cylinder 15 makes two revolutions,
It is possible to continuously perform printing of four colors.

In this printing apparatus, it is also possible to perform monochromatic printing or the like instead of performing the above-described four-color printing.

For example, in the case of printing only with black ink in this printing machine, the first plate cylinder 11
Image areas 67a and 67b in the printing plate P held in
To form the same image. Then, the ink supply device 20
so that a can supply black ink to both image areas 67a, 67b. In addition, another ink supply device 2
0b, 20c, 20d are the first and second plate cylinders 11, 12
Keep it away from. In this state, the impression cylinder 15
A new printing paper S is supplied from the paper feed cylinder 16 every time it rotates. As a result, each time the impression cylinder 15 makes one rotation, the impression cylinder 15
The image with the black ink is transferred from the image area 67a or 67b on which the same image is formed to the printing paper S held on the outer periphery of the sheet, and monochromatic printing can be performed.

In this case, the second plate cylinder 1
The second and second blanket cylinders 14 are not used. Therefore, the second blanket cylinder 14 may be kept in the unrolled state by the cylinder inserting mechanism shown in FIG. Further, while printing is performed using the first plate cylinder 11 and the first blanket cylinder 13, the second plate cylinder 12 is moved to the image recording position, and at this position, the second plate cylinder 12 is moved. The plate making process may be executed above.

[0149]

According to the first aspect of the present invention, the leading end of the first arm is pulled by the pulling portion of the reciprocating drive means arranged in the vicinity of the plate cylinder , so that the plate cylinder moves to the first position. By moving the claw to the release position in the state of being arranged at the angle position and pressing the tip of the second arm by the pressing portion of the reciprocating drive means, the plate cylinder is moved to the first angle <. Since it has a structure for moving the pawl to the release position in the state of being arranged at the second angular position different from the position, the single pawl opening / closing mechanism allows the pawl to be moved at two different angular positions. It is possible to execute the opening / closing operation of the claw. Therefore, the structure of the printing plate holding mechanism can be simplified.

According to the second aspect of the present invention, by pulling the tip of the first arm by the pulling portion of the reciprocating drive means arranged in the vicinity of the plate cylinder that has been moved to the attachment / detachment position,
By moving the claw to the release position in the state where the plate cylinder is arranged at the first angular position , and pressing the tip of the second arm by the pressing part of the reciprocating drive means,
Plate cylinder disposed in a second angular position different from the first angular position
Since the claw is moved to the release position in the opened state , the claw opening / closing operation can be performed at two different angular positions by the single claw opening / closing mechanism. Therefore, the structure of the printing plate holding mechanism can be simplified.

According to the third aspect of the invention, the first lever or the first lever or the first lever or the first lever is provided at the pulling portion of the reciprocating drive means arranged near the first plate cylinder or the second plate cylinder that has moved to the attachment / detachment position. By pulling the tip of the first arm of the second lever, the first claw or the first plate cylinder or the second plate cylinder is arranged in the first angular position. The first plate cylinder is moved by moving the second claw to the release position and pressing the tip of the second arm of the first lever or the second lever with the pressing portion of the reciprocating drive means.
Or the second plate cylinder has a second corner different from the first angular position.
Since the first pawl or the second pawl is moved to the release position in the state in which the first pawl or the second pawl is moved to the release position, the single pawl opening / closing mechanism allows the first pawl or the second pawl to move at different angular positions. It is possible to open and close the claws. Therefore, the structure of the printing plate holding mechanism can be simplified. At this time, since the common reciprocating driving means can be used for the first and second plate cylinders, the structure of the printing plate holding mechanism for the first and second plate cylinders can be further simplified. You can

[Brief description of drawings]

FIG. 1 is a schematic side view of a printing apparatus to which a printing plate holding mechanism according to the present invention is applied.

FIG. 2 is a front view of first and second plate cylinder moving mechanisms 31 and 32.

FIG. 3 is a side sectional view showing the vicinity of a bearing portion 33 in the first plate cylinder moving mechanism 31.

FIG. 4 is a rotation preventing member 47 arranged on the first plate cylinder 11.
FIG. 9 is a schematic diagram showing the relationship between the release member 48 disposed at the first printing position.

FIG. 5 is a rotation preventing member 47 arranged on the first plate cylinder 11.
FIG. 9 is a schematic diagram showing the relationship between the release member 48 disposed at the first printing position.

FIG. 6 is a rotation preventing member 47 arranged on the first plate cylinder 11.
FIG. 9 is a schematic diagram showing the relationship between the release member 48 disposed at the first printing position.

FIG. 7 is a rotation preventing member 47 arranged on the first plate cylinder 11.
FIG. 8 is a schematic diagram showing a release member 49 disposed at an image recording position.

FIG. 8 is a front view around the plate cylinder rotating mechanism 30.

9 is a side sectional view showing a main part of FIG.

10 is a schematic side view showing an image recording device 25, a plate supply section 23, and a plate discharge section 24. FIG.

11 is a schematic plan view of the image recording device 25. FIG.

FIG. 12 is a schematic side view showing a printing plate supply and discharge mechanism.

FIG. 13 is an explanatory diagram showing a mounting operation of the printing plate P.

FIG. 14 is an explanatory diagram showing a mounting operation of the printing plate P.

FIG. 15 is an explanatory diagram showing a mounting operation of the printing plate P.

16 is an explanatory diagram showing a mounting operation of the printing plate P. FIG.

FIG. 17 is an explanatory diagram showing a mounting operation of the printing plate P.

FIG. 18 is an explanatory diagram showing a mounting operation of the printing plate P.

FIG. 19 is an explanatory diagram showing a discharging operation of the printing plate P.

FIG. 20 is an explanatory diagram showing a discharging operation of the printing plate P.

FIG. 21 is an explanatory diagram showing a discharging operation of the printing plate P.

FIG. 22 is a perspective view of the vicinity of the lever 152.

23 is a front view of the pawl opening / closing mechanism 134. FIG.

FIG. 24 is an explanatory diagram showing the arrangement of image areas 67 on the printing plate P.

FIG. 25 is a schematic view showing a cylinder inserting mechanism for the first blanket cylinder 13.

FIG. 26 is a block diagram showing the main electrical configuration of the printing apparatus.

FIG. 27 is a flowchart showing an outline of plate making and printing operations by the printing apparatus.

FIG. 28 is a flowchart showing a plate making process.

FIG. 29 is an explanatory diagram illustrating a printing operation of the printing apparatus.

FIG. 30 is an explanatory diagram illustrating a printing operation of the printing apparatus.

FIG. 31 is an explanatory diagram illustrating a printing operation of the printing apparatus.

FIG. 32 is an explanatory diagram illustrating a printing operation of the printing apparatus.

FIG. 33 is an explanatory diagram illustrating a printing operation of the printing apparatus.

FIG. 34 is an explanatory diagram illustrating a printing operation of the printing apparatus.

[Explanation of symbols]

11 First plate cylinder 12 Second plate cylinder 13 First Blanket Body 14 Second Blanket Body 15 impression cylinder 16 Paper feed cylinder 17 Output cylinder 20 Ink supply device 21 Dampening water supply system 23 Plate Supply Department 24 Plate ejection section 25 Image recording device 26 Development Processing Equipment 27 Paper feeder 28 Paper output section 30 plate cylinder rotation mechanism 31 First plate cylinder moving mechanism 32 Second plate cylinder moving mechanism 73 Claw mechanism 130 pressure roller 131 Tip claw mechanism 132 Claw open / close mechanism 133 Rear end claw mechanism 134 Claw open / close mechanism 135 Guide roller mechanism 148 Claw seat 149 First arm 150 Second arm 152 lever 153 claws 156 coil spring 157 Air cylinder 159 blocks 161 Lower end 162 recess P printing plate S printing paper

Claims (3)

(57) [Claims] 1. A printing plate holding mechanism of a printing apparatus for holding an end of a printing plate to be mounted on an outer peripheral portion of a plate cylinder, wherein a nail seat arranged near a surface of the plate cylinder is different from each other. Having first and second arms extending in a direction,
A lever that is swingable around a shaft that is disposed on the plate cylinder, and that is disposed on the first arm side of the lever, and contacts the surface of the claw seat in accordance with the swinging motion of the lever. A pawl capable of swinging between a holding position and a release position separated from the surface of the pawl seat; a biasing means for biasing the lever in a direction in which the pawl comes into contact with the surface of the pawl seat; A reciprocating portion is provided near the body and includes a towing portion for pulling the tip of the first arm of the lever and a pushing portion for pushing the tip of the second arm of the lever. And a reciprocating drive means having, by pulling the tip of the first arm by the pulling unit, while moving the claw to the release position in the state where the plate cylinder is arranged at the first angular position, The tip portion of the second arm is pushed by the pushing portion. It makes is placed in a different second angular position from the plate cylinder <br/> said first angular position
A printing plate holding mechanism of a printing apparatus, wherein the claw is moved to a release position in the opened state . 2. A printing plate holding mechanism of a printing apparatus for holding an end of a printing plate to be mounted on an outer peripheral portion of a plate cylinder, and a printing position at which printing is performed by the printing plate held on the outer peripheral portion, A plate cylinder capable of reciprocating between a printing plate attachment / detachment position for attaching / detaching the printing plate to / from the outer peripheral portion, a nail seat arranged near the surface of the plate cylinder, and a first extending in different directions, Has a second arm,
A lever that is swingable around a shaft that is disposed on the plate cylinder, and that is disposed on the first arm side of the lever, and contacts the surface of the claw seat in accordance with the swinging motion of the lever. A pawl capable of swinging between a holding position and a release position separated from the surface of the pawl seat; a biasing means for biasing the lever in a direction in which the pawl comes into contact with the surface of the pawl seat; A pulling portion arranged near the plate cylinder moved to the position for pulling the tip of the first arm of the lever, and a pushing portion for pushing the tip of the second arm of the lever. And a reciprocating driving unit provided in the reciprocating unit, and pulling the tip of the first arm by the pulling unit to release the claw in a state in which the plate cylinder is arranged at the first angular position. To the second arm by the pressing portion. The plate cylinder is placed at a second angular position different from the first angular position by pressing the leading end of the plate cylinder.
A printing plate holding mechanism of a printing apparatus, wherein the claw is moved to a release position in the opened state . 3. A printing plate holding mechanism of a printing apparatus for holding an end portion of a printing plate to be mounted on an outer peripheral portion of a plate cylinder, wherein a first printing position for printing with the printing plate held on the outer peripheral portion. And a first plate cylinder capable of reciprocating between a mounting and dismounting position of the printing plate for mounting and dismounting the printing plate on the outer periphery thereof, and a second printing position for performing printing with the printing plate held on the outer periphery thereof. A second plate cylinder capable of reciprocating between the attachment / detachment position, a first pawl seat arranged near the surface of the first plate cylinder, and first and second extending in different directions. With two arms,
A first swingable centering on an axis arranged on the first plate cylinder
And a lever disposed on the first arm side of the first lever,
With the swinging movement of the first lever, it is possible to swing between a holding position in contact with the surface of the first claw seat and a release position in which it is separated from the surface of the first claw seat. Claw, a biasing means for biasing the first lever in a direction in which the first claw comes into contact with the surface of the first claw seat, and is arranged near the surface of the second plate cylinder. A second claw seat, and first and second arms extending in different directions,
A second swingable centering on a shaft arranged on the second plate cylinder
And a lever disposed on the first arm side of the second lever,
A second swingable second movement lever between a holding position in contact with the surface of the second pawl seat and a release position separated from the surface of the second pawl seat in accordance with the swinging motion of the second lever. Claw, a biasing means for biasing the second lever in a direction in which the second claw comes into contact with the surface of the second claw seat, and the first plate cylinder or the first plate cylinder moved to the attaching / detaching position. And a second pulling portion for pulling the tip of the first arm of the first lever or the second lever, the pulling portion being provided in the vicinity of the second plate cylinder, and the second pulling portion of the first lever or the second lever.
And a reciprocating drive means having a pressing portion for pressing the tip of the arm of the first arm of the first lever or the second lever in the reciprocating portion. By towing the first
The plate cylinder or the second plate cylinder is arranged at the first angular position.
In the state , the first claw or the second claw is moved to the release position, and the tip portion of the second arm of the first lever or the second lever is pushed by the pushing portion . The plate cylinder or the second plate cylinder of the first
Printing plate holding mechanism of the printing apparatus, characterized in that moving to a different second angular position arranged state in <br/> Oite the first pawl or the release position of the second pawl and the angular position .