JPH1199632A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink supply device for supplying ink uniformly over the entire image region of a printing plate without deteriorating the print accuracy. SOLUTION: When a first plate cylinder 11 turns and a cam 241 arranged thereon abuts against cam followers 341, 343, arms secured to shafts 337, 338 turn together with the shafts 337, 338 and releasing cams 304, 305 secured to the shafts 337, 338 turn clockwise. Consequently, abutting members 306, 311 and 314 provided for arms 302, 308 and 312 are pressed by the releasing cam 304 or 305 and inking rollers 291, 292 and 293 arranged thereat moves from an ink supply position abutting on the surface of a printing plate to a retracting position separated from the surface of the printing plate P fixed to the first plate cylinder 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus having an ink supply device for selectively supplying ink to a plurality of image areas on a printing plate held on a plate cylinder of the printing apparatus.

[0002]

2. Description of the Related Art A plate cylinder having a plurality of printing plates mounted on its outer periphery, and a plurality of ink supplies for supplying inks of different colors to image areas of the plurality of printing plates held by the plate cylinder. 2. Description of the Related Art A printing apparatus that includes a printing apparatus and performs printing with a plurality of colors of ink using a single plate cylinder or impression cylinder is known.

For example, Japanese Patent Application Laid-Open No. 3-143634 discloses a plate cylinder having two printing plates mounted on the outer periphery thereof, and a method for supplying inks of different colors to the respective printing plates on the plate cylinder. It has two ink supply units, a single dampening solution supply unit for supplying dampening solution to each printing plate on the plate cylinder, and an impression cylinder having a half diameter of the plate cylinder. A printing apparatus is described in which printing paper is supplied with ink of two colors by supplying the printing paper every time the impression cylinder makes two rotations. The ink supply device in this printing apparatus raises and lowers the ink forming roller for applying ink to the printing plate in synchronization with the rotation of the plate cylinder by a cam mechanism, so that the ink forming roller is applied only to the corresponding printing plate. I try to make it abut.

[0004]

SUMMARY OF THE INVENTION In an ink supply apparatus used in such a printing apparatus, when a single inking roller is brought into contact with the surface of the printing plate to supply the ink, the ink is supplied to the printing plate. However, there is a problem that the amount of ink to be used is insufficient, and unevenness in application of ink tends to occur. For this reason, it is preferable to arrange a plurality of inking rollers in parallel in the circumferential direction of the plate cylinder.

At this time, when these ink forming rollers are moved up and down in a lump, the contact positions of the respective ink forming rollers with the printing plate are different from each other. Therefore, the ink supply depends on the position of the image area on the printing plate. The problem of different amounts arises. In addition, since the operation of supplying ink to the printing plate by the inking roller is performed in parallel with the printing operation, when a plurality of inking rollers are moved up and down in a lump, the inking roller moves up and down. Vibration is transmitted to the plate cylinder, causing a problem that printing accuracy is deteriorated.

The present invention has been made to solve the above problems, and provides a printing apparatus capable of uniformly supplying ink to an entire image area of a printing plate without deteriorating printing accuracy. The purpose is to do.

[0007]

According to a first aspect of the present invention, there is provided a printing apparatus provided with an ink supply device for selectively supplying ink to a plurality of image areas of a printing plate held by a plate cylinder. A cam that is arranged corresponding to the image area on the side surface of the plate cylinder and rotates in synchronization with the plate cylinder; and a cam for supplying ink to the image area by contacting the surface of the printing plate. A plurality of ink rollers arranged in parallel in the circumferential direction of the plate cylinder, a plurality of ink roller support arms for individually supporting the plurality of ink rollers, and the cam as the plate cylinder rotates. A plurality of ink roller support arms sequentially swinging between an ink supply position at which the ink roller contacts the surface of the printing plate and a retracted position separated from the surface of the printing plate. Sa Characterized by comprising a ink roller support arm swinging mechanism that.

According to a second aspect of the present invention, in the first aspect of the present invention, the cam follower is retracted from a contact position with the cam so that the cam follower and the cam follower are rotated during rotation of the plate cylinder. Cam follower moving means for preventing the contact with the cam and fixing the ink roller support arm at the ink supply position is further provided.

According to a third aspect of the present invention, in the first or second aspect of the invention, the plurality of ink rollers are moved in a direction away from the plate cylinder, so that the plurality of ink rollers are moved away from the plate cylinder. Ink roller moving means for preventing contact between the ink roller and the printing plate irrespective of rotation of the cam due to rotation is further provided.

According to a fourth aspect of the present invention, there is provided an ink supply device and a dampening solution supply device for selectively supplying ink and dampening solution to a plurality of image areas on a printing plate held by a plate cylinder. A printing device provided with a cam that is arranged corresponding to the image area on the side surface of the plate cylinder, rotates in synchronization with the plate cylinder, and has an ink on the image area by contacting the surface of the printing plate. A plurality of ink rollers disposed in parallel in the circumferential direction of the plate cylinder, a plurality of ink roller support arms individually supporting the plurality of ink rollers, and rotation of the plate cylinder. A cam follower that contacts the cam with the plurality of ink roller support arms, the ink roller between an ink supply position where the ink roller contacts the surface of the printing plate and a retreat position where the ink roller is separated from the surface of the printing plate. An ink roller supporting arm swinging mechanism for sequentially swinging, a dampening roller for supplying dampening water to the image area by contacting the surface of the printing plate, and a water supporting the dampening roller. A damper roller supporting arm, and a cam follower that comes into contact with the cam as the plate cylinder rotates, and the dampening roller supporting arm is provided with a dampening water supply in which the dampening roller contacts the surface of the printing plate. A watering roller support arm swinging mechanism for swinging between a position and a retracted position separated from the surface of the printing plate.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the plate cylinder holds a single printing plate having a plurality of image areas on an outer peripheral portion thereof. ing.

According to a sixth aspect of the present invention, in the first aspect of the invention, the plate cylinder holds a plurality of printing plates each having a single image area on an outer peripheral portion thereof. doing.

[0013]

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 according to the present invention.

This printing apparatus comprises a first and a second plate cylinder 11,
After recording an image on a printing plate having no image recorded on the plate 12 and making a plate, the ink supplied to the printing plate is applied to the impression cylinder 15 via the first and second blanket cylinders 13 and 14. The printing is performed by transferring the image to the held printing paper.

As will be described later, according to this printing apparatus, an image recording apparatus and a development processing apparatus used in a plate making process of a printing plate and an ink supply apparatus and a dampening water supply apparatus used in a printing process are used. And so on can be arranged at different positions where they 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 plate 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 simplified. Prices can be lowered.

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 two-dot chain line, and a first printing cylinder 11 shown by a solid line in FIG. And a second plate cylinder 12 movable between the second printing position and the image recording position.

The first plate cylinder 11 moved to the first printing position
As described in detail later, an ink supply device 20a for supplying, for example, black (K) ink to the printing plate, and an ink for supplying, for example, magenta (M) ink to the printing plate. A supply device 20b and dampening water supply devices 21a and 21b for supplying dampening water to the printing plate are arranged. Further, around the second plate cylinder 12 moved to the second printing position, for example, cyan (C)
Supply device 20c for supplying the printing ink, an ink supply device 20d for supplying, for example, yellow (Y) ink to the printing plate, and a dampening water supply device for supplying a dampening solution to the printing plate. 21c and 21d are arranged. Further, around the first plate cylinder 11 or the second plate cylinder 12 that has moved to the image recording position, a plate supply section 23, a plate discharge section 24, an image recording device 25, and a development processing device 26 are arranged. Have been.

The printing apparatus includes a first blanket cylinder 13 provided to be able to contact the first plate cylinder 11 and a second blanket cylinder provided to be able to contact 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.
9 and a blanket cleaning device 29
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. 31,3
By the drive of No. 2, it 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. In addition, 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 moves to the first printing position, the first plate cylinder 1
A gear 51 attached to the first blanket cylinder 13 and a gear 52 attached to the first blanket cylinder 13 are configured to mesh with each other. Similarly, when the second plate cylinder 12 moves 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 configured to mesh with each other.

For this reason, 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 synchronously with the second blanket cylinder 14 at the second printing position.

Further, a traction type plate cylinder rotating mechanism 30, which will be described later, is disposed near the image recording position, and both the first and second plate cylinders 11 and 12 move to the image recording position. In this state, the plate cylinder rotating mechanism 30
Rotates by the drive of

FIG. 2 is a front view of the above-described first and second plate cylinder moving mechanisms 31 and 32, and FIG. 3 is a side sectional view showing the vicinity of the bearing 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 which is symmetrical to each other, the members common to the first and second plate cylinder moving mechanisms 31 and 32 are the same. Are given.

The first and second plate cylinder moving mechanisms 31 and 32 are
In order to move a bearing portion 33 including a pair of bearings 34 for supporting the support shafts 36 of the first and second plate cylinders 11 and 12, a slot 38 formed in a side plate 37 is provided (see FIG. 2, only the slot 38 is shown, and the side plate 37 is not shown.) The bearing 33 is connected to a slide holder 41 that can move along a guide member 39. The slide holder 41 is provided with a nut 42. The nut 42 is screwed with a ball screw 44 connected to a drive shaft of the motor 35.

For this reason, the first plate cylinder 11 is
Is movable together with the slide holder 41. The first plate cylinder 11 is provided with a guide member 39.
Along with the ball screw 44, a solid line in FIG.
Further, a first printing position indicated by a two-dot chain line in FIG.
It moves between an image recording position indicated by a two-dot chain line in FIG. 1 and a solid line in FIG. Similarly, the second plate cylinder 12 is driven by the motor 35 to move the slide holder 41.
It can be moved with. 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 an image recording position indicated by a two-dot chain line in FIG. 1 and a solid line in FIG.

A fixing member 43 for fixing the bearing 33 is disposed 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 respectively have
First and second plate cylinder moving mechanisms 31 and 32 for the first and second plates
When the first and second plate cylinders 1 and 12 are moved,
A rotation preventing mechanism, described later, for preventing rotation of the first and second motors 12 is provided.

The rotation of the first and second plate cylinders 11 and 12 is prevented by using the rotation preventing mechanism for the following reason. In other words, 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 positional deviation of printing and the part This positional relationship needs to be constant at all times because a problem of collision occurs. At this time, at the image recording position, when recording an image on the printing plate held by the first and second plate cylinders 11 and 12 by the image recording device 25 described later, the first and second plates are used. The rotation angle positions of the trunks 11 and 12 are monitored by a photocoupler 87 and a rotary encoder, 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 rotate, and the first and second plate cylinders 1 and 2 are rotated.
In some cases, the rotational positional relationship between the first and second blanket cylinders 13 and 14 and the like may be shifted. Therefore, the first and second plate cylinders 1 are rotated by using the rotation preventing mechanism.
First and second plate cylinders 11 and 12 when the first and second plates 12 and 12 move.
It prevents rotation of.

This anti-rotation mechanism comprises first and second plate cylinders 1.
A disk-shaped rotary plate 46 connected to the first and second support shafts 36 and having a cutout in a part of the outer periphery thereof, and the rotation of the rotary plate 46 is regulated by engaging with the cutout of the rotary plate 46. A rotation preventing member 47 and a releasing member disposed near the first and second printing positions for releasing the engagement of the rotation preventing member 47 with the notch of the rotating plate 46 at the first and second printing positions. 48, and a release member 49 disposed near the image recording position to release the engagement of the rotation preventing member 47 with the notch of the rotary plate 46 at the image recording position.

FIG. 4 shows the rotation preventing member 47 provided on the first plate cylinder 11 and the releasing member 4 provided at the first printing position.
FIG. 8 is a schematic diagram showing a relationship with the reference numeral 8. This rotation preventing member 47
Are a lever 54 swingable about a shaft 53 provided in the bearing portion 33, an engaging pin 55 erected on the front side of the lever 54, and a back surface of the engaging pin 55 with respect to the lever 54. The guide pin 56 erected on the side and the guide pin 5
6 and a spring 58 for urging the engaging pin 55 in the direction of the rotating plate 46 by swinging the lever 54. On the other hand, the release member 48
It is composed of a cam member having an inclined surface 59 for guiding the guide pin 56.

The second plate cylinder 12 is also provided with a rotation preventing member 47 similar to the above, and the second printing position is also provided with a releasing member 48 similar to the above.

FIG. 7 is a schematic diagram showing the relationship between the rotation preventing member 47 and the release member 49 disposed at the image recording position when the first plate cylinder 11 has moved to the image recording position. The release member 49 is provided on the pressing pin 5 of the rotation preventing member 47 of the first plate cylinder 11 moved to the image recording position.
There is provided a pressing plate 62 which is reciprocated by an air cylinder 61 for pressing the lower side 7.

When the second plate cylinder 12 moves to the image recording position, the pressing pin 57 of the rotation preventing member 47 provided on the second plate cylinder 12 is pressed by the pressing plate 62 of the releasing member 49. Pressed.

FIG. 8 is a front view of the vicinity of the above-described plate cylinder rotating mechanism 30, and FIG. 9 is a side sectional view showing a main part thereof.
The plate cylinder rotating mechanism 30 is provided with a first,
For rotating the second plate cylinders 11 and 12,
The first and second plate cylinders 11 and 12 are provided on the opposite side of the above-described rotation preventing mechanism. In FIG. 9, the transmission rotor 78 and its moving mechanism are not shown.

The plate cylinder rotating mechanism 30 is connected to a driving roller 76 rotated by the drive of a motor 75 and a support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12 so as to be connected to the first plate cylinder. First and second driven rollers 77 arranged concentrically with the cylinder 11 or the second plate cylinder 12, and a drive roller 76 concentrically arranged 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 of the driving roller 76 is
9 is immersed in the oil stored therein. Further, as described above, the driven roller 77 is concentric with the first plate cylinder 11 or the second plate cylinder 12 through the support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12. The first printing drum 11 and the second printing drum 12 rotate in synchronization with each other. Further, the transmission roller 78 is rotatably supported by a distal end of a cylinder rod of an air cylinder 80 whose base end is swingably connected to a support member 91 via a shaft 92. Accordingly, it is possible to move between a drive transmitting position in which both the driving roller 76 and the driven roller 77 are brought into pressure contact with each other and a retracted position separated from the surfaces of the driving roller 76 and the driven roller 77.

For this reason, by moving the transmission roller 78 to the drive transmission position and rotating the drive roller 76 at a constant speed by driving the motor 75, the rotation of the drive roller 76 is transmitted via the transmission roller 78. Driven roller 7
7, the first plate cylinder 11 rotates at a constant speed.
At this time, the driving force of the motor 75 is
Is transmitted to the first plate cylinder 11 or the second plate cylinder 12 by a traction-type drive transmission mechanism utilizing the frictional force between the roller and the driven roller 77 and the transmission roller 78. Alternatively, the second plate cylinder 12 can be accurately rotated without causing rotation unevenness.

At this time, in particular, in the above-described embodiment, since the transmission roller 78 is movable between the drive transmission position where it is pressed against both the drive roller 76 and the driven roller 77 and the retracted position. After the first and second plate cylinders 11 and 12 have moved to the image recording position,
8 is brought into pressure contact with both the driving roller 76 and the driven roller 77 so that the transmission roller 78, the driving roller 76 and the driven roller 77 do not slip, and
The second plate cylinders 11 and 12 can be accurately rotated.

Therefore, as in the printing apparatus according to this embodiment, the movement of the first and second plate cylinders 11 and 12 between the image recording position and the first and second printing positions causes Even when the driven roller 77 has a configuration in which the driven roller 77 moves in a different direction from each other, after the first and second plate cylinders 11 and 12 have been moved to the image recording positions, the transmission roller 78 is driven by the driving roller 76 and the driven roller 77. By moving the transmission roller 78 to the drive transmission position in pressure contact with both of them, the transmission roller 78 can be securely pressed not only to the drive roller 76 but also to each driven roller 77 moved to the image recording position. 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 formed of V blocks for positioning and fixing the first and second plate cylinders 11 and 12 at predetermined angular positions.
1a, 81b, 81c and 81d are provided. The positioning members 81 a, 81 b, 81 c, and 81 d engage with a locking pin 85 provided at the end of a lever 84 that swings about a shaft 83 by driving the air cylinder 82, thereby causing the driven roller 77 to move. First and second plate cylinders 1 through
It is used for positioning and fixing 1, 12 at a predetermined rotation angle position.

The driven roller 77 is provided with a detection plate 86 which is used to detect the rotation angle position of the driven roller 77, and the side plate 37 detects the detection plate 86. Photocoupler 87 is provided. The rotation angle position of the driven roller 77, that is, the rotation angle position of the first and second plate cylinders 11 and 12, is determined by the detection signal of the detection plate 86 by the photocoupler 87 and
The first and second plates are connected to the support shafts 36 of the second plate cylinders 11 and 12.
And a rotary encoder (not shown) that generates a pulse signal with the rotation of the plate cylinders 11 and 12.

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

Next, first, the first rotation prevention mechanism
Anti-rotation operation for the second plate cylinders 11, 12, and
The rotation driving operation of the first and second plate cylinders 11 and 12 by the above-described traction type plate cylinder rotation 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. However, the rotation prevention operation and the rotation driving operation for the second plate cylinder 12 are also performed by 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 the first blanket cylinder 13 and the gear 52 arranged concentrically mesh with each other.

In this state, if the first plate cylinder 11 starts moving from the first printing position to the image recording position by the first plate cylinder moving mechanism 31, as shown in FIG. The gear 51 arranged coaxially with the cylinder 11 and the gear 52 arranged coaxially with the first blanket cylinder 13 are gradually disengaged. In addition, the rotation preventing member 4
7, the guide pin 56 slides along the inclined surface 59 of the release member 48, and the lever 54 swings about the shaft 53, so that the engagement pin 55 starts moving into the notch in the rotating plate 46. .

At this time, the gear 51 disposed coaxially with the first plate cylinder 11 and the gear 52 disposed coaxially with the first blanket cylinder 13 completely mesh with each other. The first plate cylinder 1 has not been released and has been rotated by the rotation preventing member 47.
Since the rotation of 1 is not yet performed, 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 being damaged by collision.

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 released, the guide pin 56 of the rotation preventing member 47 is released.
Is completely disengaged from the inclined surface 59 of the release member 48, and the engagement pin 55 is completely housed in the notch in the rotating plate 46. Therefore, rotation of the first plate cylinder 11 is prevented.

In this state, the first plate cylinder 11 is moved to the image recording position by driving the first plate cylinder moving mechanism 31, as shown in FIG. Then, as shown in FIG. 8, the transmission roller 78 of the plate cylinder rotating mechanism 30 is driven by the air cylinder 80 so that the driving roller 76 and the driven roller 77 are driven.
Are moved to the drive transmission position in pressure contact with both. Thereafter, the pressing plate 62 of the release mechanism 49 is moved from the position indicated by the solid line to the position indicated by the two-dot line in FIG. This allows
When the pressing pin 57 of the rotation preventing member 47 moves downward and the lever 54 swings about the shaft 53, the engaging pin 55 is disengaged from the notch in the rotating plate 46.
Accordingly, 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 a printing plate is mounted on the first plate cylinder 11. 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 device 26. When the recording and development processing of the image on the printing plate is completed, the first plate cylinder 11 is returned to the origin position using the detection values of the detection plate 86 and 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 with the engagement pin 85. Thus, the first plate cylinder 11 is positioned and fixed at a predetermined rotation angle position via the driven roller 77.

Thereafter, the pressing plate 6 in the release mechanism 49
2 is moved from the position indicated by the two-dot chain line in FIG. 7 to the position indicated by the solid line in FIG. As a result, the pressing pin 57 of the rotation preventing member 47 moves upward and the lever 54 swings about the shaft 53 so that the engaging pin 55 of the rotation preventing member 47 Engage. Accordingly, rotation of the first plate cylinder 11 is prevented. Thereafter, the air cylinder 82 is driven so that the positioning member 81a and the engaging pin 85
Disengage with.

Subsequently, 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. Along with the movement of the first plate cylinder 11, the rotation preventing member 47 is operated in a reverse operation to the movement of the first plate cylinder 11 from the first printing position to the image recording position shown in FIGS. The engagement between the engagement pin 55 and the notch in the rotary plate 46 is released.

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

At this time, when the gear 51 arranged coaxially with the first plate cylinder 11 and the gear 52 arranged coaxially with the first blanket cylinder 13 start the meshing operation. Accompanying
The prevention of rotation of the first plate cylinder 11 by the rotation preventing 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. I do. Therefore, it is possible to prevent the gears 51 and 52 from being damaged by collision.

Then, as shown in FIG. 4, the first plate cylinder 1
1 is returned to the first printing position, the gear 51 and the first blanket cylinder 1 arranged concentrically with the first plate cylinder 11
The gear 3 and the coaxially arranged gear 52 completely mesh with each other.

Referring again to FIG. 1, around the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position,
A plate feeding section 23 and a plate discharging section 24 are arranged.

The plate supplying section 23 includes a supply cassette 63 for storing a long roll-shaped printing plate on which no image is 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 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 are provided. It is arranged. The first and second plate cylinders 11 and 12 are provided with a pair of holding claws (not shown) for holding the leading and trailing ends of the printing plate supplied from the plate supply unit 23. .

After the printing is completed, the plate discharging section 24 moves the first plate cylinder 1
It has a claw mechanism 73 for peeling the printing plate held on the first or second plate cylinder 12 and a conveyor mechanism 69 for transporting the printing plate peeled by the action of the claw mechanism 73 to the discharge cassette 68. .

The leading end of the printing plate pulled out of the supply cassette 63 in the plate supplying section 23 is guided by a guide roller 65 and a guide member 64, and one of the first plate cylinder 11 and the second plate cylinder 12 is held. It is added to the nail. Then, the first plate cylinder 11 or the second plate cylinder 12 is rotated by the drive of the plate cylinder rotating mechanism 30, and the printing plate is moved to the first plate cylinder 11.
Alternatively, it is wound around the outer peripheral portion of the second plate cylinder 12. Then, the rear end of the printing plate cut by the cutter 66 is held by the other holding claw. In this state, as described above, while the first plate cylinder 11 or the second plate cylinder 12 is rotated at a low speed by driving the plate cylinder rotation mechanism 30,
The image recording device 25 irradiates a modulated laser beam onto the surface of the printing plate held on the outer peripheral portion of the first plate cylinder 11 or the second plate cylinder 12 to record an image.

The printing plate P mounted on the outer peripheral portion of the first plate cylinder 11 is image-recorded by the image recording device 25 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. Further, as shown in FIG. 10B, the printing plate P mounted on the outer peripheral portion of the second plate cylinder 12 has an image area 67c for printing with cyan ink, as shown in FIG. And an image area 67d for printing with yellow ink. The image area 67a and the image area 67b are equally distributed in a state where the image area 67a and the image area 67b are attached to the outer peripheral portion of the first plate cylinder 11 (that is, 180 degrees apart from each other).
It is recorded at the position where Similarly, the image area 67c and the image area 67d are recorded at positions where they are equally distributed (that is, 180 degrees apart from each other) when mounted on the outer peripheral portion of the second plate cylinder 12. You.

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

Further, around the first plate cylinder 11 which has moved to the first printing position, a dampening solution supply device 21a and a dampening solution supply device 21b have moved to the second printing position. Second
A dampening solution supply device 21c and a dampening solution supply device 21d are arranged around the plate cylinder 12. These dampening water supply devices 21a, 21b, 21c and 21d (when these are collectively referred to as “dampening water supply device 21”),
A dampening solution is supplied to the printing plate P before the ink is supplied to the printing plate P by the ink supply device 20.

The ink rollers 71 of the ink supply devices 20a and 20b perform a swing operation by the action of a cam 241 and the like described later. Then, by the swinging operation, the ink roller 71 of the ink supply device 20a is applied to the image region 67a of the two image regions 67a and 67b formed on the printing plate P held on the outer peripheral portion of the first plate cylinder 11. But also the image area 67b
When the ink rollers 71 of the ink supply device 20b come into contact with each other, ink can be supplied to each of the image areas 67a and 67b. Similarly, the ink rollers 71 of the ink supply devices 20c and 20d also perform a swing operation by the action of a cam 241 and the like described later. Then, by this swinging operation, the ink roller 71 of the ink supply device 20c is applied to the image region 67c of the two image regions 67c and 67d formed on the printing plate P held on the outer peripheral portion of the second plate cylinder 12. However, the ink supply device 20 is located in the image area 67d.
When the ink rollers 71 of d come into contact with each other, ink can be supplied to each of the image areas 67c and 67d.

On the other hand, the dampening water supply device 21a of the dampening water device 21 is provided in the image area 67a of the printing plate P.
The fountain solution supply device 21b is provided in the image area 67 of the printing plate P.
b, the dampening solution supply device 21c is configured to supply the dampening solution to the image region 67c of the printing plate P, and the dampening solution supply device 21d is configured to supply the dampening solution to the image region 67d of the printing plate P.

FIG. 11 shows the ink supply device 20 described above.
a, 20b, 20c, 20d and dampening water supply device 21
a, 21b, 21c, and 21d, the ink supply device 2
FIG. 12 is a schematic view of the ink supply device 20a and the dampening water supply device 21a as viewed from the rear side. In addition,
The other ink supply devices 20b, 20c, 20d and the dampening solution supply devices 21b, 21c, 21d have the same configuration as the ink supply device 20a and the dampening solution supply device 21a.

Hereinafter, the structure of the dampening water supply device 21a will be described.

As shown in FIG. 11, the dampening water supply device 21a includes a watercraft 242 for storing dampening water and a watercraft 242.
A fountain roller 243 that pumps up the dampening water by immersing it in the dampening water in 42, and a damping roller 244 that contacts the surface of the printing plate P and supplies the damping water to the image area 67a.
And an intermediate roller 245 disposed between the water source roller 243 and the watering roller 244.

The wetting roller 244 is shown in FIGS.
As shown in FIG. 2, it is pivotally supported by a pair of left and right first arms 253 that can swing about a shaft 251. The water source roller 243 is pivotally supported by a pair of left and right second arms 254 that can swing about a shaft 252. Further, the intermediate roller 245 is connected to the water roller 243 by a pair of left and right support plates (not shown), and is supported by the second arm 254 via the support plate 255.

Further, as shown in FIG.
43 is provided with a gear 246, and the wetting roller 244 is provided with a gear 2.
A gear 248 is attached to the intermediate roller 245, and the gears 246, 247, 248
Are connected to each other. Further, a gear 247 attached to the wetting roller 244 meshes with a gear 51 (see FIGS. 4 to 6) provided on the first plate cylinder 11. For this reason,
Water source roller 243, watering roller 244, and intermediate roller 2
45 rotates from the first plate cylinder 11 in synchronization with each other.

Further, the gear 247 attached to the dipping roller 244 is connected to the ink supply device 20a as described later.
Gear 24 concentric with shaft 251 for transmitting drive to
9 as well.

The dampening water stored in the watercraft 242 is supplied to a water source roller 243, a watering roller 244, and an intermediate roller 245.
With the rotation of the water source roller 243 and the intermediate roller 24.
5 to the wetting roller 244 via the first plate cylinder 1
1 on the printing plate P.

The dampening water supply device 21a has a dampening roller moving mechanism 256 for bringing the dampening roller 244 into contact with only a necessary area of the printing plate P.
13 to 15 show the dampening water supply device 21a shown in FIG.
It is a schematic diagram which extracts and shows the watering roller moving mechanism 256 part from FIG.

The watering roller moving mechanism 256 moves the watering roller 244 via the first arm 253, and the tip of the watering roller 244 comes into contact with a cam 241 attached to the first plate cylinder 11. A lever 263 having a cam follower 261 and swinging about a shaft 262 is provided. The lever 263 is urged by a spring 264 in a direction (clockwise) in which the cam follower 261 contacts the cam 241. On this lever 263, a solenoid 265 and a shaft 266 are arranged.
The first arm 253 is connected to the second arm 254 by a pressing spring unit 284 shown in FIGS.
, The watering roller 244 is urged in a direction (clockwise) to come into contact with the surface of the printing plate P held on the outer peripheral portion of the first plate cylinder 11.

A shaft 262 as a swing center of the lever 263
Has a contact portion 259 of the first arm 253 at its tip.
A lever 268 provided with a contact member 267 which comes into contact with
A lever 271 having a pin 269 is fixed to the end thereof. This lever 268 is urged counterclockwise by a spring 273. The shaft 262 extends from the front side shown in FIGS. 11 and 13 to the rear side shown in FIG. Also on the rear side shown in FIG. 12, the shaft 262 has a lever 26 provided with a contact member 267 that comes into contact with the contact portion 259 of the first arm 253.
8 is fixed. Further, the shaft 26 on the lever 263
6 is provided with a lever 272, one end of which is connected to the solenoid 265 and the other end of which contacts the pin 269.

FIG. 16 is a side view showing a cam 241 attached to the first plate cylinder 11. A cam 241 shown by a solid line in FIG. 16 is an image area for printing with magenta ink, which is opposite to the angular position corresponding to the image area 67a for printing with black ink shown in FIG. In the angular position corresponding to 67b, the first plate cylinder 11
It is attached to the front side of. The cam 241 rotates together with the first plate cylinder 11 and contacts the cam follower 261 of the wetting roller moving mechanism 256 in the dampening water supply device 21a to swing the lever 263 around the shaft 262.

The cam 2 shown by a virtual line in FIG.
41 is a dampening roller 2 in the dampening water supply device 21b.
Used to move 44. This cam 241 is
At an angular position corresponding to the image area 67a for printing with black ink, which is opposite to the angular position corresponding to the image area 67b for printing with magenta ink shown in FIG. Is attached to the plate cylinder 11. The second plate cylinder 12 is also provided with a pair of cams 241 similar to the above.

The moving operation of the dampening roller 244 in the dampening roller moving mechanism 256 of the dampening water supply device 21a is as follows.

That is, as shown in FIG. 13, the wet roller 244 is opposed to the image area 67a for printing with black ink, and the cam 24 attached to the first plate cylinder 11 is provided.
1 and cam follower 2 disposed at the tip of lever 263
In a state where the first plate cylinder 11 is at an angular position where the first plate cylinder 61 is not engaged with the first plate cylinder 61, the first arm 253 swings by the urging force of a contact pressure adjusting mechanism 257 described later, so that the wetting roller 244 is in the third position. It has been moved to a dampening solution supply position in contact with the surface of the printing plate P held on the outer peripheral portion of the first plate cylinder 11. For this reason, the wetting roller 244 serves as an image area 67 for printing with black ink shown in FIG.
Contact with a.

In this state, when the first plate cylinder 11 rotates, the water source roller 243 and the water setting roller 244 are rotated.
And the intermediate roller 245 are driven by the first plate cylinder 11 and rotate in synchronization with each other. For this reason, the dampening water stored in the watercraft 242 is transferred from the water source roller 243 to the watering roller 244 via the intermediate roller 245, and the image area 67a in the printing plate P on the first plate cylinder 11 is moved. It is supplied to the whole surface.

On the other hand, as shown in FIG. 14, the wetting roller 244 faces the image area 67b for printing with magenta ink, and the cam 24 attached to the first plate cylinder 11
1 and cam follower 2 disposed at the tip of lever 263
When the first plate cylinder 11 rotates to the angular position where the first plate cylinder 61 faces the cam 61, the cam follower 261 rides on the cam 241, and the lever 263 swings counterclockwise about the shaft 262. As the lever 263 swings counterclockwise, the solenoid 2 disposed on the lever 263 is rotated.
The lever 65 and the lever 272 move, and the lever 272 presses the contact pin 269 provided at the end of the lever 271. The pressing force on the contact pin 269 causes the lever 2
71 rotates with the shaft 262, thereby causing the lever 268 to rotate.
Swings counterclockwise about the axis 262.

Then, with the swing of the lever 268, a contact member 267 provided at the tip of the lever 268 is provided.
Presses the contact portion 259 of the first arm 253, whereby the first arm 253 swings counterclockwise against a biasing force of a contact pressure adjusting mechanism 257 described later.
As a result, as shown in FIG.
Moves to a retracted position separated from the surface of the printing plate P held on the outer peripheral portion of the first plate cylinder 11. For this reason, the wetting roller 244 in the dampening water supply device 21a is
It does not come into contact with the image area 67b for printing with magenta ink shown in FIG.

Incidentally, the dipping roller 244 is connected to the first plate cylinder 1.
The movement amount of the watering roller 244 when moving to the retreat position separated from the surface of the printing plate P held on the outer peripheral portion of
Gear 24 attached to watering roller 244 shown in FIG.
7 and the gear 51 attached to the first plate cylinder 11
Is smaller than the total value of the tooth addendum. For this reason, as shown in FIG. 14, even when the watering roller 244 moves to the retracted position, the gear 247 attached to the watering roller 244 and the gear 51 attached to the first plate cylinder 11 are not moved. Is maintained. Therefore, even when the watering roller 244 moves to the retracted position, the watering roller 244, together with the water source roller 243 and the intermediate roller 245, receives the drive from the first plate cylinder 11 and synchronizes with each other. Rotate.

In the dampening water supply device 21b,
A watering roller moving mechanism 256 similar to the above is provided. However, the cam follower 261 of the dampening roller moving mechanism 256 in the dampening water supply device 21b comes into contact with the cam 241 shown by a virtual line in FIG.
The dampening roller 244 in the dampening water supply device 21b is brought into contact with the image area 67b for printing with magenta ink shown in FIG.

As described above, by disposing the same number of dampening water supply devices 21 as the ink supply devices 20 in correspondence with each image region, the ink of the color that should be supplied to the image region of the printing plate can be obtained. It is possible to prevent a phenomenon in which inks of different colors are attached and stains are generated on printed matter beforehand.

Further, this watering roller moving mechanism 257
15, the lever 272 is moved to the shaft 2 by the action of the solenoid 265 disposed on the lever 263.
When swinging clockwise about the center 66, the engagement between the lever 272 and the contact pin 269 provided at the end of the lever 271 is released. For this reason,
The lever 26 is placed on a cam 241 attached to the first plate cylinder 11.
Even if the lever 263 swings counterclockwise about the shaft 262 by the cam follower 261 disposed at the tip of the third climbing, unlike the case shown in FIG. The hit pin 269 is not pressed. Therefore, since the first arm 253 does not swing, the watering roller 244 is provided on the printing plate held on the outer peripheral portion of the first plate cylinder 11 regardless of the rotation angle position of the first plate cylinder 11. Stop at the supply position abutting the surface of P.

Therefore, for example, in a case where the dampening solution is supplied to both the image areas 67a and 67b in the printing plate P by the dampening solution supply device 21a at the time of monochromatic printing described later, as shown in FIG. By stopping the dampening roller 244 at the supply position by the action of the solenoid 265, it becomes possible to supply dampening water to both image areas 67a and 67b in the printing plate P by the dampening water supply device 21a.

Next, the ink supply device 20 according to the present invention will be described.
The configuration of a will be described. This ink supply device 20a
Is disposed above the dampening water supply device 21a, as shown in FIGS.

FIG. 17 is an enlarged view of a main part of FIG. 11, and is a schematic view of the ink supply device 20a as viewed from the front side in FIG. FIG. 18 is an enlarged view of a main part of FIG. 12, and is a schematic view of the ink supply device 20a as viewed from the rear side in FIG. In FIG. 18, illustration of the ink roller 71 and the like is omitted.

The ink supply device 20a includes an ink source roller 290 constituting the ink fountain 72 and a first plate cylinder 1
The printing plate P is brought into contact with the printing plate P mounted on
Rollers 291 and 2 that supply ink to the
92, 293, and three ink mixing rollers 29 that perform ink mixing by a swinging operation that reciprocates in the axial direction thereof.
4, 295, 296, an ink feeding roller 297 for transferring the ink on the ink source roller 290 to the ink mixing roller 296, and two ink transfer rollers 29.
8, 299. In this specification and FIG. 1, these rollers 290, 291, 292, 29
3,294,295,296,297,298,299
Are collectively referred to as “ink roller 71”.

The ink roller 71 and the ink fountain 7
The ink supply device 20a including the right and left side plates 3
15 directly or indirectly. The pair of left and right side plates 315 swings about the shaft 251 between the position indicated by the solid line and the position indicated by the two-dot line in FIGS. 17 and 18 by driving the pair of left and right air cylinders 316. It is configured to be possible. Therefore,
The entire ink supply device 20a swings by driving the pair of left and right air cylinders 316.

The ink application roller 291 of the above-described ink roller 71 is pivotally supported by a pair of left and right arms 302 that swing about a shaft 301. The arm 302 is urged by a pair of left and right springs 303 in a direction (counterclockwise in FIG. 17) in which the ink forming roller 291 contacts the first plate cylinder 11. Further, the arm 302 has a release cam 3 of an arm swinging mechanism described later.
A pair of right and left contact members 306 that come into contact with 04 are provided.

The ink forming roller 292 is connected to the shaft 30.
The arm 7 is pivotally supported by a pair of left and right arms 308 that swing about the center 7. The arm 308 includes a pair of left and right springs 3.
09, the inking roller 292 moves the first plate cylinder 11
17 (counterclockwise in FIG. 17). Further, the arm 308 is provided with a pair of left and right contact members 311 that abut against a release cam 305 of an arm swing mechanism described later.

Further, the ink forming roller 293 is connected to the shaft 3
07 are pivotally supported by a pair of left and right arms 312 that swings around the center. The arm 312 has a pair of left and right springs 313 that allow the ink forming roller 293 to move the first plate cylinder 1.
1 (clockwise in FIG. 17). Further, the arm 312 is provided with a pair of left and right contact members 314 which abut against a release cam 305 of an arm swing mechanism described later.

A gear 319 meshing with a gear 318 connected to a motor is provided on the back side of the shaft 317 of the ink source roller 290, as shown in FIG. Therefore, the ink source roller 290 rotates by receiving the drive of the motor. Also, the shaft 31 of the ink source roller 290
7, a gear 321 is attached to the front side.

The ink feeding roller 297 has a shaft 3
The arm 22 is pivotally supported by a substantially Y-shaped arm 323 that can swing around the center 22. This arm 323 has a cam follower 3
25 is attached. On the other hand, a cam 328 is provided on a shaft 327 of a gear 326 that rotates in synchronization with the ink source roller 290 by meshing with a gear 321 provided on the ink source roller 290. And the arm 32
3 is urged by a spring 324 in the direction in which the cam follower 325 contacts the cam 328 (clockwise direction shown in FIG. 17). For this reason, the ink feeding roller 297
Is a position where the ink source roller 290 is brought into contact with the ink source roller 290 as the ink source roller 290 rotates.
Reciprocate between the position where it abuts.

The ink mixing rollers 294, 295, 2
As shown in FIG. 18, a gear 331,
332 and 333 are provided respectively. These gears 331, 332, 333 are connected to the drive transmission gear 33.
The shaft 251 and the gear 249 for transmitting the drive from the dampening water supply device 21a to the ink supply device 20a are connected to the gear 249 via 4, 335, and 336.
Therefore, the ink mixing rollers 294, 295, and 296
These gears 331, 332, 333, 334, 33
5, 336 and 249, so as to rotate in synchronization with the first plate cylinder 11.

In the ink supply device 20a, the ink stored in the ink fountain 72 is supplied to the ink source roller 2
From 90, the ink is transferred to an ink mixing roller 296 by an ink feeding roller 297, and the ink mixing roller 294,
295,296 and ink transfer rollers 298,299
After kneading, the ink forming rollers 291, 292,
293 is supplied to the printing plate P mounted on the first plate cylinder 11.

Next, the arm swing mechanism in the ink supply device 20a will be described. FIG. 19 and FIG.
It is explanatory drawing which shows the rocking | fluctuation operation | movement of the arm 302,308,312 by an arm rocking | fluctuation mechanism, FIG.21 and FIG.22 is a principal part top view of an arm rocking | rocking mechanism.

As shown in these figures, the release cam 304 abutting on the contact member 306 is fixed to the shaft 337, and the release cam 305 contacting the contact members 311 and 314 is fixed on the shaft 338. ing. These shafts 337, 338 are rotatably supported by a pair of left and right side plates 315 shown in FIGS. Also,
The shaft 337 is fixedly provided with an arm 342 having a cam follower 341 at the tip thereof, which is in contact with the cam 241. The shaft 338 has a cam 24 at the tip thereof.
Arm 34 having cam follower 343 abutting on 1
4 is fixed. In FIGS. 21 and 22, the cam followers 341 and 34 are shown for convenience of explanation.
3 is shown on the side of the cam follower 343.

At one end of each of the shafts 337 and 338, a bearing 345 is provided.
5 are connected to each other by a connecting member 347 connected to the air cylinder 346. Therefore, the shafts 337 and 3
Numeral 38 denotes a contact position at which the cam 241 and the cam followers 341 and 343 shown in FIG. 21 can come into contact with each other, and the cam follower 3 shown in FIG.
The cam 241 reciprocates between the 41 and 343 and the retracted position where the cam 241 cannot contact with the cam 241 in synchronization with the axial direction.

The other ends of the shafts 337 and 338
A pair of stoppers 3 engageable with both ends of the lever 351
48 are provided. As shown in FIG. 18, the lever 351 is connected to a solenoid 352 via a connecting member 353, and the shaft 3 is driven by the driving of the solenoid 352.
It can swing about 49.

In such a configuration, as shown in FIG. 19, when the cam 241 provided on the first plate cylinder 11 is not in contact with the cam followers 341 and 343, each of the arms 302 , 308, 312
Are urged by springs 303, 309, 313, and the respective ink forming rollers 291, 292, 293 disposed there.
Is disposed at an ink supply position that comes into contact with the surface of the printing plate P mounted on the outer peripheral portion of the first plate cylinder 11.

In this state, when the first plate cylinder 11 rotates and the cam 241 provided on the first plate cylinder 11 comes into contact with the cam follower 341, the arm 34 fixed to the shaft 337 is
2 rotates with this shaft 337. As the shaft 337 rotates, the release cam 304 fixed to the shaft 337 also moves
It rotates clockwise as shown in FIG.
The rotation of the release cam 304 causes the arm 30 to rotate.
As shown in FIG. 20, the contact member 306 attached to 2 is pressed by the release cam 304, and the arm 302 is moved from the ink supply position where the ink application roller 291 provided there comes into contact with the surface of the printing plate as shown in FIG. 20. The printing plate P moves to a retracted position separated from the surface of the printing plate P mounted on the first plate cylinder 11.

When the first plate cylinder 11 further rotates from this state, and the cam 241 provided on the first plate cylinder 11 comes into contact with the cam follower 343, the arm 344 fixed to the shaft 338 is moved. It rotates with this shaft 338. This axis 3
The release cam 30 fixed to the shaft 338 with the rotation of the
5 also rotates around the axis 338 in the clockwise direction shown in FIG. Then, by the rotation of the release cam 305, a contact member 311 attached to the arms 308 and 312 is provided.
And 314 are sequentially pressed by the release cam 304, and the arms 308 and 312 are moved from the ink supply position where the ink forming rollers 292 and 293 disposed thereon come into contact with the surface of the printing plate P, as shown in FIG. Printing plate P
Move sequentially to the retreat position separated from the surface.

On the other hand, if the first plate cylinder 11 further rotates and the contact state between the cam 241 disposed on the first plate cylinder 11 and the cam followers 341 and 343 is sequentially released,
By the operation reverse to the above, each arm 302, 308, 3
Reference numeral 12 denotes an inking roller 291, 2 provided therein.
92, 293 sequentially move to the ink supply position in contact with the surface of the printing plate P.

Here, as described above, the cam 241 is
It is disposed at an angular position corresponding to the image region 67b for printing with magenta ink, which is opposite to the angular position corresponding to the image region 67a for printing with black ink shown in FIG. I have. Accordingly, each of the ink application rollers 291, 292, and 293 swings the arms 302, 308, and 312 by the above-described arm swing mechanism, and the image area 67 for printing with black ink.
a, it descends on the surface of the printing plate P near the starting end, and rises from above the surface of the printing plate P near the end of the image area 67a.

Therefore, according to the above-described configuration, the ink is supplied by sequentially contacting the three inking rollers 291, 292, and 293 with the upper surface of the printing plate P, so that the ink is supplied to the image area 67 a of the printing plate P. In addition, it is possible to sufficiently supply the ink without unevenness, and it is possible to prevent the printing accuracy from deteriorating due to the vibration caused by the elevation of the roller or the like.

In this printing apparatus, as will be described later, when performing monochrome printing using only black ink, for example, the above-described ink supply device 20a is used to convert the image areas 67a and 67b shown in FIG. Need to be supplied with black ink. In this case, by the action of the air cylinder 346, FIG.
Cam followers 341 and 343 and a cam 241 shown in FIG.
The shafts 337 and 338 are moved in the axial direction from a contact position where the cam 241 cannot contact with the cam followers 341 and 343 shown in FIG.

In a state where the shafts 337 and 338 are arranged at the positions shown in FIG. 22, the phases of the cam followers 341 and 343 and the cam 241 are shifted as shown in FIG. The cam followers 341 and 343 do not contact the cam 241 irrespective of the rotation of the cam 241 accompanying the above. Therefore, each of the arms 30
2, 308 and 312 are the respective inking rollers 291 and 2
92, 293 will be fixed at the ink supply position in contact with the surface of the printing plate P. For this reason, the ink application rollers 291, 292, 293 of the ink supply device 20 a
Accordingly, black ink can be supplied to both the image areas 67a and 67b.

On the contrary, in this printing apparatus, for example, when performing monochromatic printing using only magenta ink, the image areas 67a and 67b shown in FIG. To supply magenta ink to both. In this case, regardless of the rotation of the cam 241 due to the rotation of the first plate cylinder 11, it is necessary to keep the respective inking rollers 291 292 293 of the ink supply device 20a away from the surface of the printing plate P. is there. In this case, the stopper 348 fixed to the lever 351 and the shafts 337 and 338 is used.

FIGS. 23 to 25 show the lever 3 shown in FIG.
It is explanatory drawing which shows operation | movement of 51, a stopper 348, etc.

When the cam followers 341 and 343 abut against the cam 241, the shafts 337 and 338 rotate, and the ink forming rollers 291, 292 and 293 are separated from the surface of the printing plate P. Stopper 3 with rotation of shafts 337 and 338
48 also rotates. FIG. 23 shows an arrangement relationship between the pair of stoppers 348 and the lever 351 in such a state.

On the other hand, the cam followers 341 and 343
Are separated from the cam 241 so that the shafts 337 and 3
38 returns to the original angular position, and the ink forming roller 29
When 1, 292 and 293 are in contact with the surface of the printing plate P, the stopper 348 rotates to the original angular position with the return operation of the shafts 337 and 338 described above. FIG. 24 shows the positional relationship between the pair of stoppers 348 and the lever 351 in such a state.

Then, irrespective of the rotation of the cam 241 caused by the rotation of the first plate cylinder 11, the respective inking rollers 291, 292, 293 of the ink supply device 20a are separated from the surface of the printing plate P. Is a cam follower 34
In a state where the pair of stoppers 348 are at the angular positions shown in FIG.
The driving of the solenoid 352 causes the lever 351 to rotate clockwise as shown in FIG. 23 via the connecting member 353. Then, as shown in FIG. 25, both ends of the lever 351 engage with the protrusions of the stopper 348, and the stopper 348 is fixed by the lever 351.

In such a state, the first plate cylinder 1
As the cam followers 341 and 343 separate from the cam 241 with the rotation of the shaft 1, the shafts 337 and 3
When the shaft 38 attempts to return to the original angular position, a pair of stoppers 3 fixed to these shafts 337 and 338 are used.
Since the lever 48 is fixed by the lever 351, rotation of the shafts 337 and 338 is prevented. Accordingly, as described above, the arms 302, 308, and 312 remain fixed at the retracted positions, and regardless of the rotation of the cam 241 accompanying the rotation of the first plate cylinder 11, each of the ink forming rollers 291 and 292, 293 is separated from the surface of the printing plate P.

Therefore, for example, when performing monochrome printing using only magenta ink, the ink supply device 20a
Each of the ink forming rollers 291, 292, 293 of FIG.
The contact between the image areas 67a and 67b shown in (a) is prevented, and the ink supply device 2 is provided in both the image areas 67a and 67b.
It becomes possible to supply only magenta ink from 0a.

The driving operation of the lever 351 and the stopper 348 by the driving of the solenoid 352 is controlled by the control unit 140 described later.

Referring to FIG. 1 again, below the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position,
The development processing device 26 described above is provided. The development processing device 26 has a development unit, a fixing unit, and a diaphragm unit,
In FIG. 1, it is configured to be able to move up and down between a standby position indicated by a two-dot chain line and a development processing position indicated by a solid line.

When the printing plate P on which an image is recorded by the image recording device 25 is developed by the developing device 26, the first plate cylinder 11 or the second plate cylinder is driven by the plate cylinder rotating mechanism 30. The developing unit, the fixing unit, and the squeezing unit are sequentially brought into contact with the printing plate P rotating together with the printing plate P.

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 periphery thereof. Then, the first and second blanket cylinders 13, 1
Reference numeral 4 designates a configuration in which the first and second plate cylinders 11 and 12 and the impression cylinder 15 can be freely contacted and separated by a cylinder insertion mechanism described later.

FIG. 26 shows the first blanket cylinder 13.
FIG. 2 is a schematic diagram showing a body insertion mechanism. The mechanism for inserting the second blanket cylinder 14 has the same configuration as the mechanism for inserting the first plate cylinder 13 shown in FIG.

An eccentric shaft 102 having a center different from that of the shaft 101 is continuously provided on 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 further different from the shafts 101 and 102 is provided. Therefore, as shown in FIG. 26, the center 104 of the shaft 101 (that is, the center of the first blanket cylinder 13), 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 connecting portion between the two connecting plates 111 and 112 has a cylinder rod 114 of the air cylinder 113.
The tip is connected. The main body of the air cylinder 113 is connected to one end of a rotation plate 116 that rotates around 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 the two connecting plates 12 forming a link mechanism.
1, 122. The distal end of a cylinder rod 124 of an air cylinder 123 fixed to the apparatus main body is connected to a connecting portion between the two connecting plates 121 and 122. Further, the worm wheel 125 connected to the eccentric member 119 is screwed with a worm gear 127 rotated by driving of the motor 126.

In such a configuration, when the cylinder rods 114 and 124 of each of the air cylinders 113 and 123 are extended, as shown in FIG. 26, the surface of the first blanket cylinder 13 and the first plate cylinder 11 And impression cylinder 1
5 are separated 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 using the two connecting plates 111, 112 and the like. It moves in the direction of the plate cylinder 11 and the cylinder 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 first blanket cylinder 13 is moved by the action of the link mechanism constituted by the two connecting plates 121, 122 and the like. It moves in the direction of the impression cylinder 15, and is inserted into the impression cylinder 15.
At this time, since the rotating plate 116 also rotates clockwise about the shaft 115, 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
1 is maintained.

When the eccentric member 119 is rotated, the shaft 120 of the eccentric member 119 moves slightly. 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, the printing pressure at the time of printing using the first blanket cylinder 13 can be adjusted.

Referring to FIG. 1 again, the blanket cleaning device 29 disposed between the first and second blanket cylinders 13 and 14 moves from the unwinding roll to the winding roll via a plurality of pressure rollers. The cleaning liquid is supplied to a long cleaning cloth stuck on the path leading to the path, and the cleaning cloth is brought into contact with the first and second blanket cylinders 13 and 14 and then slid, whereby the first cleaning cloth is slid. , The surfaces of the second blanket cylinders 13 and 14 are cleaned. The cleaning cloth was applied to the impression cylinder 1
The surface of the impression cylinder 15 may also be cleaned by contacting the surface of the impression cylinder 5.

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

The paper feed cylinder 16 disposed adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper feeding cylinder 16 holds and transports the leading end of the printing paper supplied one by one from the paper feeding unit 27 by a gripper (not shown) by a suction board 74 that reciprocates. The leading end 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 paper discharge cylinder 17 disposed adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper discharge cylinder 17 has a structure in which a pair of chains 19 is wound around both ends, and grippers are provided on connecting members (not shown) that connect the pair of chains 19. The leading end of the printing paper held by the gripper of the impression cylinder 15 is
When the printing paper is transferred 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, the printing paper is conveyed onto the paper discharge unit 28 as the chain 19 moves and is discharged.

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 paper discharge cylinder 17, and the first and second blanket cylinders 13 and 14 are respectively 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, they are connected by the gears 51 and 52 attached to their ends, respectively. Accordingly, by the driving of a drive motor (not shown), these paper feed cylinder 16, impression cylinder 15, discharge cylinder 17, first and second blanket cylinders 13, 14, and first and second plate cylinders 11, 12 are moved. Rotate in synchronization with each other.

FIG. 27 is a block diagram showing a main electrical configuration of the printing apparatus. This printing apparatus has a ROM 141 storing operation programs necessary for controlling the apparatus.
And a RAM 1 in which data and the like are temporarily stored during control.
And a control unit 140 including a CPU 143 for executing a logical operation. The control unit 140 controls the ink supply device 20, the image recording device 25, the development processing device 26, the blanket cleaning device 2 via the interface 144.
9, first and second plate cylinder moving mechanisms 31, 32, first and second
And a drive circuit 145 for generating a drive signal for a drive unit or the like in a blanking mechanism for the blanket cylinders 13 and 14. 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 the printing apparatus will be described. FIG. 28 is a flowchart showing an outline of a plate making and printing operation by the printing apparatus. Note that the printing and plate making operations are performed when multicolor printing is performed on printing paper with four color inks of yellow, magenta, cyan, and black.

First, a prepress process for recording an image on the printing plate P on the first and second plate cylinders 11 and 12 and performing a developing process is executed (step S1). This plate making process is executed in accordance with a subroutine shown in the flowchart of FIG.

That is, first, the first plate cylinder 11 is
Is moved to the plate making position indicated by the two-dot chain line (step S11). The movement of the first plate cylinder 11 is performed by moving the slide holder 41 along the guide member 39 by driving the motor 35 of the first plate cylinder moving mechanism 31 shown in FIG.

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
This operation is performed by holding the leading end of the printing plate P pulled out from the supply cassette 63 and the rear end of the printing plate P cut by the cutter 66 with a pair of holding claws (not shown).

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 on the first plate cylinder 11 by the plate cylinder rotation mechanism 30.
Is rotated at a low speed, and a modulated laser beam is emitted 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 has been recorded is developed (step S14). In this developing process, the developing device 26 is raised from the standby position indicated by the two-dot chain line in FIG. 1 to the developing position indicated by the solid line, and then rotated together with the first plate cylinder 11 by driving the plate cylinder rotating mechanism 30. This is performed by sequentially bringing the developing unit, the fixing unit, and the diaphragm unit into contact with the printing plate P.

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

Subsequently, a 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 in steps S11 to S15 (steps S16 to S2).
0). Then, when the plate making on the printing plate P held on the outer periphery of the first and second plate cylinders 11 and 12 is completed, the plate making process is completed.

Referring again to FIG. 28, when the plate making process is completed, a printing process for performing printing on printing paper using the printing plate P on the first and second plate cylinders 11 and 12 is executed (step). S2). The operation of the printing apparatus in this printing step 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 a plate making position indicated by a two-dot chain line in FIG. Then, the first plate cylinder 11 is rotated counterclockwise by the plate cylinder rotation mechanism 30, and the end of the printing plate P held on the first plate cylinder 11 is peeled off by the claw mechanism 73. The printing plate P is guided by the conveyor mechanism 69, and the discharge cassette 6
Discharge into 8. Then, after returning the first plate cylinder 11 to the first printing position, the second plate cylinder 12 is moved from the second printing position to the plate making position, and by performing the same operation as described above, The printing plate P held on the second plate cylinder 12 is discharged into the discharge cassette 68.

When the step of discharging the printing plate P is completed, first,
The second blanket cylinders 13, 14 are cleaned (Step S4). At the time of 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 inserting mechanism shown in FIG.
After separating from the first and second and the impression cylinder 15, the first and second
Are rotated. In this state, the cleaning cloth supplied with the cleaning liquid in the blanket cleaning device 29 is supplied to the first and second blankets 13 and 14.
First, by contacting the surface and sliding
The second blanket cylinders 13, 14 are cleaned.

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). To perform 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 performed by removing and cleaning the ink adhered 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 the steps are completed.

Next, the operation of the printing apparatus in the above-described printing process will be described. FIGS. 30 to 35 are explanatory diagrams showing the printing operation of the printing apparatus. In these figures, the length of the printing paper S and the impression cylinder 1 are shown for convenience of explanation.
5, the circumferential lengths of the paper feed cylinder 16 and the paper discharge cylinder 17 are expressed as being the same, but in actuality, the length of the printing paper S is the impression cylinder 15, the paper feed cylinder 16, and the paper discharge cylinder 17. 17 is shorter than the circumference.

The printing operation described below is for a case where multicolor printing is performed on printing paper with four colors of ink of yellow, magenta, cyan, and black, as described above. 30 to 35, for convenience of explanation,
In the first plate cylinder 11 and the first blanket cylinder 13, the area K on the side used for printing black ink is denoted by K.
Further, the region of the first plate cylinder 11 and the first blanket cylinder 13 on the side used for printing magenta ink is denoted by the symbol M, and the second plate cylinder 12 and the second The area C on the side of the blanket cylinder 14 that is used for printing cyan ink is denoted by C, and the second plate cylinder 12 and the second blanket cylinder 14 on the side that is used for printing yellow ink. The region is denoted by the symbol Y.

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 is provided with a black ink as shown in FIG. An image area 67a for printing with magenta ink 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. 10B, an image area 67c for printing with cyan ink and an image area 67d for printing with yellow ink are recorded.

As described above, the ink supply device 2
The black ink is supplied to 0a, the magenta ink is supplied to the ink supply device 20b, the cyan ink is supplied to the ink supply device 20c, and the yellow ink is supplied to the ink supply device 20d, as shown in FIG. The image area 67a of the printing plate P receives black ink from the ink supply device 20a, the image region 67b receives magenta ink from the ink supply device 20b, the image region 67c receives cyan ink from the ink supply device 20c. , Image area 67
d is yellow ink from the ink supply device 20d,
Each is supplied.

First, each dampening solution supply device 21 and each ink supply device 20 are brought into contact only with the corresponding image area of the printing plate P held on the first and second plate cylinders 11 and 12. . Thereby, each image area 67a, 67b, 67
c and 67d have corresponding dampening water supply devices 21a and 21d respectively.
While the dampening solution is supplied from b, 21c, and 21d,
The image area 67a is received from the ink supply device 20a, and the image area 67b is received from the ink supply apparatus 20b.
c, from the ink supply device 20c, and the image area 67d from the ink supply device 20d, black, magenta,
Cyan and yellow inks are supplied. Then, this ink is transferred to corresponding areas 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 performed until the printing process is completed.

The printing plate 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 supply 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 is further rotated, and the impression cylinder 1 is rotated.
When the leading end of the printing paper S held on the outer periphery of the first blanket 5 moves to a position facing the first blanket cylinder 13, the operation of the first blanket cylinder 1 is performed by the operation of the cylinder inserting mechanism shown in FIG.
3 is set in a cylinder-inserting state in which it comes into contact with the impression cylinder 15. In this state, as shown in FIG. 31, the leading end of the printing paper S comes into contact with the end of the area on the surface of the first blanket cylinder 13 on the side used for printing black ink.
Then, the black ink is transferred from the image area 67 a of the printing plate P held by the first plate cylinder 11 to the area of the surface of the first blanket cylinder 13 on the side used for printing black ink. I have. Therefore, the first
The black ink is transferred to the printing paper S by further rotating the blanket cylinder 13 and the impression cylinder 15.

If the impression cylinder 15 further rotates and the leading end of the printing paper S held on the outer periphery of the impression cylinder 15 moves to a position facing the second blanket cylinder 14, the operation of the cylinder insertion mechanism shown in FIG. As a result, the second blanket cylinder 14 is brought into the cylinder insertion state in which the second blanket cylinder 14 comes into contact with the impression cylinder 15. In this state, as shown in FIG. 32, the leading end of the printing paper S
Abuts the edge of the area of the surface of the blanket cylinder 14 on the side 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 on the side used for printing the cyan ink. I have. Therefore, when the second blanket cylinder 14 and the impression cylinder 15 are further rotated, 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 is
Continue rotating with the blanket cylinders 13 and 14 of
As shown in FIG. 33, the printing paper S is completely wound around the outer peripheral portion of the impression cylinder 15. Since the impression cylinder 15 has a half diameter 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 periphery 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.
Then, magenta ink is transferred from the image area 67b of the printing plate P held on the first plate cylinder 11 to the area of the surface of the first blanket cylinder 13 on the side used for printing magenta ink. I have. Therefore, the first
The blanket cylinder 13 and the impression cylinder 15 further rotate, so that 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 is further rotated, 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. In the area on the surface of the second blanket cylinder 14 that is used for printing the yellow ink,
Yellow ink is transferred from the image area 67d of the printing plate P held by the second plate cylinder 12. For this reason, the second blanket cylinder 14 and the impression cylinder 15 are further rotated, so that 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.

The leading end of the printing paper S on which the printing of four colors has been completed is transferred from the impression cylinder 15 to the paper discharge cylinder 17 as shown in FIG. Further, after the printing paper S to be printed next is supplied to the paper feed cylinder 16, it is transferred from the paper feed cylinder 16 to the impression cylinder 15.

Then, the printing paper S on which printing of four colors has been completed
As shown in FIG. 35, the pair of chains 19 are transported together with the grippers of the paper discharge cylinder 17 to a position above the paper discharge unit 28 and discharged.

As described above, in this printing apparatus, the impression cylinder 15 has a diameter which is half the diameter of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14. , 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 make one rotation. Then, the printing paper S held on the outer peripheral portion of the impression cylinder 15 while the impression cylinder 15 rotates twice.
Are printed in four colors of yellow, magenta, cyan, and black. Therefore, every time the impression cylinder 15 rotates twice, a new print sheet S is supplied from the sheet supply cylinder 16,
Printing of four colors can be performed continuously.

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

For example, when printing is performed using only black ink in this printing press, the first plate cylinder 11
Area 67a, 67b in printing plate P held in
To form the same image. Then, as described above, the ink supply device 20a can supply black ink to both the image areas 67a and 67b. As described above, the other ink supply devices 20b, 20c, and 20d do not contact the printing plate P mounted on the first and second plate cylinders 11, 12. In this state,
Each time the impression cylinder 15 makes one rotation, a new print sheet S is supplied from the paper supply cylinder 16. Thus, every time the impression cylinder 15 makes one rotation, an image of black ink from the image area 67a or 67b where the same image is formed is transferred to the printing paper S held on the outer periphery of the impression cylinder 15, 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 set in the cylinder-extracted state by the cylinder insertion mechanism shown in FIG. 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 the second plate cylinder 12 is moved to the image recording position. The plate making process may be executed above.

In the above-described embodiment, in order to simplify the structure of the first plate cylinder 11 or the second plate cylinder 12, the outer periphery of the first plate cylinder 11 or the second plate cylinder 12 is Each of the printing plates P held in the set has two image areas 67 each.
a, 67b or 67c, 67d. However, the first plate cylinder 11 or the second plate cylinder 12 is provided with two sets of holding claws for holding the front end portion and the rear end portion, respectively, to thereby provide the first plate cylinder 11 or the second plate cylinder. A configuration in which two printing plates P are held by each of the cylinders 12 may be adopted. Also in this case, the first printing plate P is equally distributed so that the image areas formed by the respective printing plates P are equally distributed (that is, 180 degrees apart from each other). It needs to be held on the plate cylinder 11 or the second plate cylinder 12.

In the above-described embodiment, by moving the plurality of ink rollers 291, 292, and 293 in a direction away from the first plate cylinder 11, for example, the rotation of the first plate cylinder 11 is caused. Although a pair of stoppers 348 and levers 351 are used as means for preventing the plurality of ink rollers 291, 292, 293 from contacting the printing plate P regardless of the rotation of the cam 241, the entire ink supply device 20 is used. Is swung by driving a pair of left and right air cylinders 316, so that the plurality of ink rollers 291, 292, and 293 contact the printing plate P regardless of the rotation of the cam 241 accompanying the rotation of the first plate cylinder 11 and the like. Contact may be prevented.

Further, in the above embodiment,
The inking rollers 291, 292, and 293 supporting the arms 302, 308, and 312 are supported by the first plate cylinder 11.
The arms 302, 308, and 312 are biased in advance by springs 303, 309, and 313 in a direction in which they contact with the ink, and the ink forming rollers 291 and
Although the case where the first and second plates 92 and 293 are moved in the direction away from the first plate cylinder 11 has been described, the arms 302, 308 and 312 are conversely moved to the ink forming rollers 291, 292 and 293 supported by the first and second cylinders. Are biased in the direction away from the first plate cylinder 11 in advance.
08, 312 may be moved in the direction in which the ink application rollers 291, 292, 293 contact the first plate cylinder 11 by the pressing force of the cam 241.

[0168]

According to the first aspect of the present invention, the cam rotating in synchronization with the plate cylinder and the cam follower provided on the ink roller support arm for individually supporting the plurality of ink rollers are provided. By contacting the ink rollers, the plurality of ink roller support arms are sequentially swung between an ink supply position where the ink roller contacts the surface of the printing plate and a retracted position separated from the surface of the printing plate, so that the ink is transferred. It is possible to uniformly supply the ink to the entire image area of the printing plate, and it is possible to prevent the printing accuracy from deteriorating due to the vibration caused by the elevation of the inking roller.

According to the second aspect of the present invention, by retracting the cam follower from the contact position with the cam,
When the plate cylinder is rotated, the cam follower and the cam are prevented from coming into contact with each other and the cam follower moving means for fixing the ink roller support arm to the ink supply position is further provided. It is possible to supply ink to all image areas on the held printing plate by the same ink supply device.

According to the third aspect of the present invention, by moving the plurality of ink rollers in a direction away from the plate cylinder, the ink rollers and the printing plate can be moved regardless of the rotation of the cam accompanying the rotation of the plate cylinder. Is further provided with an ink roller moving means for preventing abutment of the ink, when performing monochromatic printing, it is possible to prevent the supply of ink to the printing plate from an ink supply device corresponding to a color that does not require ink supply. .

According to the fourth aspect of the present invention, the cam that rotates in synchronization with the plate cylinder and the cam follower provided on the ink roller support arm that individually supports the plurality of ink rollers abut. This causes the plurality of ink roller support arms to swing sequentially between an ink supply position where the ink roller contacts the surface of the printing plate and a retracted position separated from the surface of the printing plate, so that the ink is printed on the printing plate. Can be uniformly supplied to the entire image area, and it is possible to prevent the printing accuracy from deteriorating due to the vibration caused by the elevation of the ink forming roller. Further, by bringing the cam into contact with a cam follower provided on a watering roller support arm that supports the watering roller, the watering roller supports the watering roller support arm against the surface of the printing plate. The fountain solution is supplied between the dampening solution supply position and the retracted position separated from the surface of the printing plate. It is possible to do.

According to the fifth aspect of the present invention, since the plate cylinder holds a single printing plate having a plurality of image areas on its outer peripheral portion, it is possible to individually apply each printing area to a single printing plate. Ink can be supplied.

According to the sixth aspect of the present invention, since the plate cylinder holds a plurality of printing plates each having a single image region on the outer periphery thereof, each plate region is individually provided for each image region. Can be supplied with dampening water.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a printing apparatus according to the present invention.

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 section 33 in the first plate cylinder moving mechanism 31.

FIG. 4 is a rotation preventing member 47 provided on the first plate cylinder 11;
FIG. 5 is a schematic diagram showing a relationship between the image forming apparatus and a release member 48 provided at a first printing position.

FIG. 5 shows a rotation preventing member 47 provided on the first plate cylinder 11.
FIG. 5 is a schematic diagram showing a relationship between the image forming apparatus and a release member 48 provided at a first printing position.

FIG. 6 shows a rotation preventing member 47 provided on the first plate cylinder 11;
FIG. 5 is a schematic diagram showing a relationship between the image forming apparatus and a release member 48 provided at a first printing position.

FIG. 7 shows a rotation preventing member 47 provided on the first plate cylinder 11.
FIG. 4 is a schematic diagram illustrating a release member 49 disposed at an image recording position.

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

FIG. 9 is a side sectional view showing a main part of FIG. 8;

FIG. 10 is an explanatory diagram showing an arrangement of an image area 67 on a printing plate P.

FIG. 11 is a schematic view of the ink supply device 20a and the dampening solution supply device 21a as viewed from the front side.

FIG. 12 is a schematic view of the ink supply device 20a and the dampening solution supply device 21a as viewed from the rear side.

FIG. 13 is a schematic diagram showing a watering roller moving mechanism 256.

FIG. 14 is a schematic diagram showing a watering roller moving mechanism 256.

FIG. 15 is a schematic diagram showing a watering roller moving mechanism 256.

16 is a side view showing a cam 241 attached to the first plate cylinder 11. FIG.

FIG. 17 is a schematic view of the ink supply device 20a as viewed from the front side.

FIG. 18 is a schematic view of the ink supply device 20a as viewed from the back.

FIG. 19 shows arms 302 and 30 by an arm swing mechanism.
It is explanatory drawing which shows the rocking | fluctuation operation of 8 and 312.

FIG. 20 shows arms 302 and 30 by an arm swing mechanism.
It is explanatory drawing which shows the rocking | fluctuation operation of 8 and 312.

FIG. 21 is a plan view of a main part of an arm swing mechanism.

FIG. 22 is a plan view of a main part of the arm swing mechanism.

FIG. 23 is an explanatory diagram showing operations of a lever 351 and a stopper 348;

FIG. 24 is an explanatory diagram showing operations of a lever 351, a stopper 348, and the like.

FIG. 25 is an explanatory diagram showing operations of a lever 351 and a stopper 348 and the like.

FIG. 26 is a schematic diagram showing a mechanism for inserting the first blanket cylinder 13;

FIG. 27 is a block diagram illustrating a main electrical configuration of the printing apparatus.

FIG. 28 is a flowchart illustrating an outline of plate making and printing operations performed by the printing apparatus.

FIG. 29 is a flowchart showing a plate making process.

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.

FIG. 35 is an explanatory diagram illustrating a printing operation of the printing apparatus.

[Explanation of symbols]

 Reference Signs List 11 first plate cylinder 12 second plate cylinder 13 first blanket cylinder 14 second blanket cylinder 15 pressure cylinder 16 paper feed cylinder 17 paper discharge cylinder 20 ink supply device 21 dampening solution supply device 23 plate supply unit 24 Plate discharging unit 25 Image recording device 26 Developing device 27 Paper feeding unit 28 Paper discharging unit 30 Plate cylinder rotating mechanism 31 First plate cylinder moving mechanism 32 Second plate cylinder moving mechanism 71 Ink roller 241 Cam 242 Watercraft 243 Water source Roller 244 Water roller 245 Intermediate roller 290 Ink roller 291 Ink roller 292 Ink roller 293 Ink roller 294 Ink roller 295 Ink roller 296 Ink roller 297 Ink roller 298 Ink transfer roller 299 Ink transfer roller 302 Arm 304 release cam 305 release cam 306 contact member 308 arm 311 contact member 312 arm 314 contact member 316 air cylinder 337 shaft 338 shaft 341 cam follower 343 cam follower 346 air cylinder P printing plate S printing paper

Claims (6)

[Claims] 1. A printing apparatus comprising an ink supply device for selectively supplying ink to a plurality of image areas on a printing plate held by a plate cylinder, the printing apparatus corresponding to the image areas on a side surface of the plate cylinder. A cam rotating in synchronization with the plate cylinder; and a cam arranged in parallel in a circumferential direction of the plate cylinder for supplying ink to the image area by abutting on a surface of the printing plate. A plurality of ink rollers, a plurality of ink roller support arms that individually support the plurality of ink rollers, and a cam follower that comes into contact with the cam as the plate cylinder rotates. An ink roller support arm swing mechanism for sequentially swinging a roller support arm between an ink supply position at which the ink roller contacts the surface of the printing plate and a retracted position separated from the surface of the printing plate; Printing apparatus characterized by comprising a. 2. The printing apparatus according to claim 1, wherein the cam follower is retracted from a contact position with the cam so that the cam follower contacts the cam when the plate cylinder rotates. A printing device further comprising a cam follower moving means for preventing the ink roller supporting arm from being fixed at the ink supply position. 3. The printing apparatus according to claim 1, wherein the plurality of ink rollers are moved in a direction away from the plate cylinder, whereby the cam of the cam associated with the rotation of the plate cylinder is moved. A printing apparatus further comprising ink roller moving means for preventing contact between the ink roller and the printing plate regardless of rotation. 4. A printing apparatus comprising an ink supply device and a dampening solution supply device for selectively supplying ink and dampening solution to a plurality of image areas on a printing plate held by a plate cylinder. A cam disposed in correspondence with the image area on the side surface of the plate cylinder, and rotating in synchronization with the plate cylinder; and a cam for supplying ink to the image area by contacting a surface of the printing plate. A plurality of ink rollers arranged in parallel in the circumferential direction of the plate cylinder; a plurality of ink roller support arms for individually supporting the plurality of ink rollers; and a cam contacting with the rotation of the plate cylinder. Having a cam follower in contact therewith and sequentially swinging the plurality of ink roller support arms between an ink supply position at which the ink roller contacts the surface of the printing plate and a retracted position separated from the surface of the printing plate. A roller supporting arm swing mechanism, a watering roller for supplying dampening water to the image area by contacting the surface of the printing plate, a watering roller supporting arm for pivotally supporting the swimsuit roller, A cam follower that comes into contact with the cam with the rotation of the plate cylinder, and the dampening roller support arm moves the dampening roller from a dampening solution supply position at which the dampening roller contacts the surface of the printing plate and the surface of the printing plate. A watering roller support arm swinging mechanism for swinging between a separated evacuation position, and a printing apparatus. 5. The printing apparatus according to claim 1, wherein the plate cylinder holds a single printing plate having a plurality of image areas on an outer peripheral portion thereof. 6. The printing apparatus according to claim 1, wherein the plate cylinder holds a plurality of printing plates each having a single image area on an outer peripheral portion thereof.