JP3615030B2 - Printing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus having an ink supply device for supplying ink to a printing plate held on a plate cylinder of the printing device.
[0002]
[Prior art]
The ink supply device for supplying ink to the printing plate is an ink that supplies ink to the printing plate by contacting the surface of the printing plate mounted on the plate cylinder and an ink reservoir such as an ink fountain for storing ink. A form roller and another ink roller for transferring the ink stored in the ink reservoir to the ink form roller are provided.
[0003]
[Problems to be solved by the invention]
In such an ink supply device, it is necessary to perform maintenance such as replacement and cleaning of the ink storage unit, the ink form roller, the ink roller, and the like at regular intervals. In order to perform this maintenance easily, the ink supply device including the ink reservoir, the ink form roller, the ink roller, etc. is collectively supported by a pair of left and right side plates, etc., and the ink supply device together with the pair of left and right side plates, etc. It is conceivable that the maintenance of the ink supply device can be easily performed at the separation position by moving between a facing position facing the plate cylinder and a separation position separated from the plate cylinder.
[0004]
Further, as previously proposed by the present applicant, a printing apparatus for recording an image on a printing plate and making a plate and then supplying ink to the printing plate to perform printing, the printing plate being attached to the outer peripheral portion thereof Printing is performed with a plate cylinder held on the plate cylinder, an image recording apparatus for recording an image on a printing plate held on the plate cylinder, an image recording position where the plate cylinder faces the image recording apparatus, and a printing plate held on the plate cylinder In a printing cylinder moving type printing apparatus (Japanese Patent Application No. 9-95023) having a printing cylinder moving mechanism that moves between printing plates, interference between the printing cylinder and the ink supply device during movement of the printing cylinder. In order to prevent this, it is preferable that the ink supply device is configured to move between an opposing position facing the plate cylinder and a separation position spaced apart from the plate cylinder.
[0005]
By the way, when ink is supplied by bringing the ink form roller into contact with the surface of the printing plate, the ink form roller is lowered onto the surface of the printing plate P in front of the start end of the image area and behind the end of the image area. It is necessary to raise from the surface of the printing plate. On the other hand, as described above, when the ink supply device including the ink reservoir, the ink form roller, and the ink roller is configured to move between a facing position facing the plate cylinder and a separated position separated from the plate cylinder, When moving the ink supply device from the separation position to the facing position, if the ink form roller of the ink supply device is in direct contact with the central portion of the image area in the printing plate, ink supply unevenness is present in the central portion of the image area. Occurs and uniform printing cannot be performed.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a printing apparatus that can prevent uneven supply of ink to a printing plate and perform uniform printing.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is an ink supply device having an ink storage part for storing ink, and an ink roller for supplying ink to the printing plate by contacting the surface of the printing plate mounted on the plate cylinder. An ink supply device moving mechanism for moving the entire ink supply device between a facing position facing the plate cylinder and a separated position spaced apart from the plate cylinder; and a side surface of the plate cylinder A cam that rotates in synchronization with the plate cylinder, an ink roller support arm that pivotally supports the ink roller, and the rotation of the plate cylinderAt a given angular positionAn ink supply position at which the ink roller contacts the surface of the printing plate in a state where the ink roller support arm is disposed at the facing position, and the ink roller is in contact with the surface of the printing plate. An ink roller support arm swing mechanism that swings between a retreat position that is separated from the surface of the plate, and the ink roller when the ink supply device is moved from the separation position to the facing position by the ink supply device moving mechanism. And a stop mechanism that stops the support operation of the ink roller support arm when the cam is moved to an angular position facing the cam follower by the rotation of the plate cylinder while stopping the support arm at the retracted position. It is characterized by that.
[0008]
Claim2The invention described in 1 is a printing apparatus for printing by recording an image on a printing plate and then supplying ink to the printing plate to perform printing, the plate cylinder holding the printing plate on the outer periphery thereof, An image recording apparatus that records an image on a printing plate held by a plate cylinder, an image recording position at which the plate cylinder faces the image recording apparatus, and a printing position at which printing is performed by a printing plate held by the plate cylinder Ink having a plate cylinder moving mechanism for moving between, an ink storage part for storing ink, and an ink roller for supplying ink to the printing plate by contacting the surface of the printing plate mounted on the plate cylinder Supply device and the ink supply device as a wholeOn the movement path of the plate cylinder by the plate cylinder moving mechanismA facing position facing the plate cylinder;,Separated from the plate cylinderOutside the movement path of the plate cylinder by the plate cylinder moving mechanismAn ink supply position at which the ink roller abuts against the surface of the printing plate in a state where the ink supply device is disposed at the facing position, and an ink supply device moving mechanism that moves between the separation position and the ink roller. And a moving mechanism that moves between the retreat position separated from the surface of the printing plate, and the ink supply device moved by the ink supply device moving mechanism when the ink supply device moves from the separated position to the opposing position. And a stop mechanism for stopping at the retracted position.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of a printing apparatus according to the present invention.
[0010]
In this printing apparatus, an image is recorded on a printing plate on which the images held on the first and second plate cylinders 11 and 12 are not recorded, and then the ink supplied to the printing plate is first, Printing is performed by transferring to the printing paper held by the impression cylinder 15 via the second blanket cylinders 13 and 14.
[0011]
As will be described later, according to this printing apparatus, an image recording apparatus, a development processing apparatus, etc. used in the plate making process of a printing plate and an ink supply apparatus, a dampening water supply apparatus, etc. used in the printing process are provided. , They can be arranged at different positions that do not interfere with each other, and the degree of freedom of the arrangement relationship can be improved. Further, since an image can be recorded on the printing plates held on the first and second plate cylinders 11 and 12 using a single image recording apparatus, the apparatus can be simplified and the entire apparatus can be simplified. The price of can be lowered.
[0012]
This printing apparatus includes a first plate cylinder 11 that can move between a first printing position indicated by a solid line in FIG. 1 and an image recording position indicated by a two-dot chain line, and a second printing indicated by a solid line in FIG. And a second plate cylinder 12 movable between the position and the image recording position.
[0013]
Around the first printing cylinder 11 moved to the first printing position, as will be described in detail later, an ink supply device 20a for supplying, for example, black (K) ink to the printing plate, and the printing plate For example, an ink supply device 20b for supplying magenta (M) ink and dampening water supply devices 21a and 21b for supplying dampening water to the printing plate are arranged. Further, around the second printing cylinder 12 moved to the second printing position, an ink supply device 20c for supplying, for example, cyan (C) ink to the printing plate, and, for example, yellow (Y) to the printing plate. An ink supply device 20d for supplying the ink and dampening water supply devices 21c and 21d for supplying dampening water to the printing plate are disposed. Further, around the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position, a plate feeding unit 23, a plate discharging unit 24, an image recording device 25, and a development processing device 26 are arranged. Has been.
[0014]
In addition, the printing apparatus includes a first blanket cylinder 13 provided so as to be in contact with the first plate cylinder 11 and a second blanket cylinder 14 provided so as to be able to contact the second plate cylinder 12. The first and second blanket cylinders 13 and 14 are provided with an impression cylinder 15 that can contact the first and second blanket cylinders 13 and 14 at different positions, and a supply for passing the printing paper supplied from the paper supply unit 27 to the impression cylinder 15. A paper cylinder 16, a paper discharge cylinder 17 around which a chain 19 for discharging printed printing paper received from the impression cylinder 15 to a paper discharge unit 28 is wound, and a blanket cleaning device 29 are provided.
[0015]
The first and second plate cylinders 11 and 12 are connected to first and second plate cylinder moving mechanisms 31 and 32, which will be described later, respectively. Is driven to reciprocate between the first or second printing position and the image recording position.
[0016]
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. 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. When the first plate cylinder 11 is moved to the first printing position, the gear 51 attached to the first plate cylinder 11 and the gear 52 attached to the first blanket cylinder 13 mesh with each other. It is configured to Similarly, when the second plate cylinder 12 is moved to the second printing position, the gear 51 attached to the second plate cylinder 12 and the gear 52 attached to the second blanket cylinder 14 are mutually connected. It is comprised so that it may mesh.
[0017]
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 in synchronization with the second blanket cylinder 14 in the second printing position.
[0018]
Further, a traction type plate cylinder rotating mechanism 30 to be described later is disposed in the vicinity of the image recording position, and both the first and second plate cylinders 11 and 12 are moved to the image recording position. The plate cylinder rotating mechanism 30 is driven to rotate.
[0019]
FIG. 2 is a front view of the first and second plate cylinder moving mechanisms 31 and 32 described above, and FIG. 3 is a side sectional view showing the vicinity of the bearing portion 33 in the first plate cylinder moving mechanism 31. Since the first and second plate cylinder moving mechanisms 31 and 32 have the same configuration that is symmetrical to each other, members common to the first and second plate cylinder moving mechanisms 31 and 32 are the same. The code | symbol is attached | subjected.
[0020]
The first and second plate cylinder moving mechanisms 31 and 32 are configured to move the side plate so as to move the bearing portion 33 including a pair of bearings 34 that support the support shaft 36 of the first and second plate cylinders 11 and 12. 37 has a slot 38 bored in 37 (note that only the slot 38 is shown in FIG. 2 and this is not shown in the side plate 37). The bearing portion 33 is connected to a slide holder 41 that can move along the guide member 39. Further, the slide holder 41 is provided with a nut 42. The nut 42 is screwed with a ball screw 44 connected to the drive shaft of the motor 35.
[0021]
For this reason, the first plate cylinder 11 is movable together with the slide holder 41 by driving the motor 35. The first plate cylinder 11 is along the guide member 39 and the ball screw 44 in the first printing position indicated by the solid line in FIG. 1 and by the two-dot chain line in FIG. 2 and the two-dot chain line in FIG. Further, it moves between image recording positions indicated by solid lines in FIG. Similarly, the second plate cylinder 12 can be moved together with the slide holder 41 by driving the motor 35. The second plate cylinder 12 is arranged along the guide member 39 and the ball screw 44 at the second printing position indicated by a solid line in FIGS. 1 and 2, a two-dot chain line in FIG. 1, and a solid line in FIG. It moves between the image recording positions indicated by.
[0022]
A fixing member 43 for fixing the bearing portion 33 is disposed in the vicinity of the first and second printing positions on the side plate 37. The first plate cylinder 11 is positioned and fixed by the fixing member 43 at the first printing position, and the second plate cylinder 12 is positioned and fixed by the fixing member 43 at the second printing position.
[0023]
The first and second plate cylinders 11 and 12 are respectively connected to the first and second plate cylinders 11 and 12 when the first and second plate cylinder moving mechanisms 31 and 32 are moved. An anti-rotation mechanism to be described later for preventing the rotation of the two plate cylinders 11 and 12 is provided.
[0024]
The reason why the rotation of the first and second plate cylinders 11 and 12 is prevented using this rotation prevention mechanism is as follows. That is, when a deviation occurs in 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, the positional deviation of printing and the interval between parts This positional relationship needs to be constant at all times. At this time, when an image is recorded on the printing plates held on the first and second plate cylinders 11 and 12 at the image recording position by an image recording device 25 described later, the first and second plates The rotational angle positions of the cylinders 11 and 12 are monitored by a photocoupler 87, a rotary encoder, etc., which will be described later. However, during the movement from the image recording position to the first and second printing positions, the first and second plate cylinders 11 and 12 are rotated, and the first and second plate cylinders 11 and 12 and the first and second printing cylinders are rotated. In some cases, the rotational positional relationship with the second blanket cylinders 13, 14, etc. may deviate. For this reason, the rotation preventing mechanism is used to prevent the first and second plate cylinders 11 and 12 from rotating when the first and second plate cylinders 11 and 12 are moved.
[0025]
This anti-rotation mechanism is connected to the support shaft 36 of the first and second plate cylinders 11 and 12 and has a disk-like rotating plate 46 having a notch part in the outer periphery thereof, and a notch portion of the rotating plate 46. A rotation preventing member 47 for restricting the rotation of the rotating plate 46 by engaging with the rotation preventing member 47, and a first anti-rotating member 47 for releasing the engagement of the rotation preventing member 47 with the notch portion of the rotating plate 46 at the first and second printing positions. Release members 48 respectively disposed near the second printing position, and release members disposed near the image recording position for releasing the engagement of the rotation preventing member 47 with the notch portion of the rotating plate 46 at the image recording position. 49.
[0026]
FIG. 4 is a schematic diagram showing the relationship between the rotation preventing member 47 disposed in the first plate cylinder 11 and the release member 48 disposed in the first printing position. The anti-rotation member 47 is engaged with the lever 54 that can swing about the shaft 53 disposed in the bearing portion 33, the engagement pin 55 erected on the surface side of the lever 54, and the lever 54. The guide pin 56 erected on the back side of the coupling pin 55, the pressing pin 57 disposed on the opposite side of the guide pin 56 with respect to the shaft 53, and the lever 54 are swung to rotate the engagement pin 55. And a spring 58 for biasing in the direction of the plate 46. On the other hand, the release member 48 includes a cam member having an inclined surface 59 for guiding the guide pin 56.
[0027]
The second plate cylinder 12 is also provided with a rotation prevention member 47 similar to the above, and the second release position is also provided with a release member 48 similar to the above.
[0028]
On the other hand, 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 in a state where the first plate cylinder 11 has moved to the image recording position. The release member 49 includes a pressing plate 62 reciprocally moved by an air cylinder 61 for pressing the pressing pin 57 of the rotation preventing member 47 in the first plate cylinder 11 moved to the image recording position downward.
[0029]
Note that when the second plate cylinder 12 is moved to the image recording position, the pressing pin 57 of the rotation preventing member 47 disposed on the second plate cylinder 12 is pressed by the pressing plate 62 of the release member 49. .
[0030]
FIG. 8 is a front view of the vicinity of the plate cylinder rotating mechanism 30 described above, and FIG. 9 is a side sectional view showing an essential part thereof. The plate cylinder rotating mechanism 30 is for rotating the first and second plate cylinders 11 and 12 at the image recording position, and prevents the rotation described above with respect to the first and second plate cylinders 11 and 12. It is arranged on the opposite side to the mechanism. In FIG. 9, the transmission rotor 78 and its moving mechanism are not shown.
[0031]
The plate cylinder rotating mechanism 30 is connected to the driving roller 76 that is rotated by the drive of the motor 75 and the support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12, whereby the first plate cylinder 11 or First and second driven rollers 77 arranged concentrically with the second plate cylinder 12, and arranged concentrically with the first plate cylinder 11 or the second plate cylinder 12 from the driving roller 76. And a transmission roller 78 for transmitting drive to one of the driven rollers 77 (hereinafter simply referred to as “driven roller 77”).
[0032]
The lower end of the drive roller 76 is immersed in oil stored in the oil pan 79. Further, as described above, the driven roller 77 is concentric with the first plate cylinder 11 or the second plate cylinder 12 via the support shaft 36 of the first plate cylinder 11 or the second plate cylinder 12. It is arranged and rotates in synchronization with the first plate cylinder 11 or the second plate cylinder 12. Further, the transmission roller 78 is rotatably supported at the tip end of a cylinder rod of an air cylinder 80 whose base end is pivotally connected to the support member 91 via a shaft 92. Thus, it is possible to move between a drive transmission position in pressure contact with both the drive roller 76 and the driven roller 77 and a retracted position separated from the surfaces of the drive roller 76 and the driven roller 77.
[0033]
Therefore, the drive roller 76 is rotated at a constant speed by driving the motor 75 while the transmission roller 78 is moved to the drive transmission position, whereby the rotation of the drive roller 76 is driven via the transmission roller 78. The first plate cylinder 11 rotates at a constant speed. At this time, the driving force by the motor 75 is generated by the first plate cylinder 11 or the second plate cylinder 12 by a traction type drive transmission mechanism using frictional forces between the driving roller 76, the driven roller 77, and the transmission roller 78. Therefore, the first plate cylinder 11 or the second plate cylinder 12 can be accurately rotated without causing rotation unevenness.
[0034]
At this time, in particular, in the above-described embodiment, the transmission roller 78 can move between the drive transmission position that is in pressure contact with both the drive roller 76 and the driven roller 77 and the retracted position. After the second plate cylinders 11 and 12 have moved to the image recording position, the transmission roller 78 is brought into pressure contact with both the driving roller 76 and the driven roller 77 to thereby provide a gap between the transmission roller 78, the driving roller 76 and the driven roller 77. The first and second plate cylinders 11 and 12 can be accurately rotated without causing slippage.
[0035]
Therefore, as in the printing apparatus according to this embodiment, the driven roller 77 is moved in accordance with the movement between the image recording position of the first and second plate cylinders 11 and 12 and the first and second printing positions. Even when the first and second plate cylinders 11 and 12 are moved to the image recording position, the transmission roller 78 is moved to both the driving roller 76 and the driven roller 77. By moving to the driving transmission position where the pressure contact is made, the transmission roller 78 can be reliably brought into pressure contact with each driven roller 77 moved to the image recording position as well as the driving roller 76. The transmission roller 78, the driving roller 76, and the driven roller It is possible to accurately rotate the first and second plate cylinders 11 and 12 without causing slippage between them.
[0036]
The driven roller 77 is provided with four positioning members 81a, 81b, 81c, 81d composed of V blocks for positioning and fixing the first and second plate cylinders 11, 12 at predetermined angular positions. Has been. The positioning members 81 a, 81 b, 81 c, 81 d engage the driven roller 77 by engaging with a locking pin 85 provided at the tip of a lever 84 that swings about a shaft 83 by driving the air cylinder 82. The first and second plate cylinders 11 and 12 are used for positioning and fixing at predetermined rotational angular positions.
[0037]
The driven roller 77 is provided with a detection plate 86 used for detecting the rotational angle position of the driven roller 77, and the side plate 37 has a photo for detecting the detection plate 86. A coupler 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 plate cylinders 11. The first and second plate cylinders 11 and 12 are connected to the 12 spindles 36 and are monitored by a rotary encoder (not shown) that generates a pulse signal as the first and second plate cylinders 11 and 12 rotate.
[0038]
Further, a light shielding plate 88 is attached to the support shaft 36 of the first and second plate cylinders 11 and 12.
[0039]
Next, the rotation prevention operation for the first and second plate cylinders 11 and 12 by the rotation prevention mechanism described above, and the first and second plate cylinders 11 and 12 by the traction type plate cylinder rotation mechanism 30 described above. The rotational driving operation will be described. In the following description, the rotation prevention operation and the rotation drive operation for the first plate cylinder 11 will be described, but the rotation prevention operation and the rotation drive operation for the second plate cylinder 12 are also executed by the same process.
[0040]
As shown in FIG. 4, when the first plate cylinder 11 is located at the first printing position, the gear 51 and the first blanket cylinder 13 arranged concentrically with the first plate cylinder 11. And the gear 52 arranged concentrically with each other.
[0041]
In this state, as shown in FIG. 5, 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, The engagement between the gear 51 arranged concentrically and the gear 52 arranged concentrically with the first blanket cylinder 13 is gradually released. Accordingly, the guide pin 56 of the rotation preventing member 47 slides along the inclined surface 59 of the release member 48, and the lever 54 swings about the shaft 53, whereby the engagement pin 55 rotates. The movement starts in the notch in the plate 46.
[0042]
At this time, the meshing of the gear 51 arranged concentrically with the first plate cylinder 11 and the gear 52 arranged concentric with the first blanket cylinder 13 is completely released. Further, since the rotation prevention member 47 has not yet prevented the rotation of the first plate cylinder 11, the first plate cylinder 11 is rotating in the counterclockwise direction in the state shown in FIG. 5. Move toward the image recording position. For this reason, it is possible to prevent the gears 51 and 52 from colliding and being damaged.
[0043]
Then, as shown in FIG. 6, the first plate cylinder 11 further moves in the image recording position direction, and the gear 51 and the first blanket cylinder 13 arranged concentrically with the first plate cylinder 11. When the engagement with the gear 52 arranged concentrically with the gear 52 is released, the guide pin 56 of the rotation prevention member 47 is completely detached from the inclined surface 59 of the release member 48 and the engagement pin 55 rotates. The plate 46 is completely stored in the notch. For this reason, rotation of the first plate cylinder 11 is prevented.
[0044]
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 rotation mechanism 30 is moved to the drive transmission position where it is pressed against both the drive roller 76 and the driven roller 77 by driving the air cylinder 80. Thereafter, the pressing plate 62 in the above-described release mechanism 49 is moved from the position indicated by the solid line in FIG. As a result, the pressing pin 57 of the rotation preventing member 47 moves downward and the lever 54 swings about the shaft 53, so that the engaging pin 55 is detached from the notch portion of the rotating plate 46. Accordingly, the first plate cylinder 11 is in a rotatable state.
[0045]
In this state, the first plate cylinder 11 is rotated at a low speed by the traction type plate cylinder rotating mechanism 30, and the printing plate is mounted on the first plate cylinder 11. Record an image. Then, after the recording of the image on the printing plate is completed, the printing plate is developed by the development processing device 26. When the recording of the image on the printing plate and the development processing are completed, the first plate cylinder 11 is returned to the origin position using the detection values by the detection plate 86, the photocoupler 87, and the like. Then, the transmission roller 78 of the plate cylinder rotating mechanism 30 is moved to the retracted position by driving the air cylinder 80, and the air cylinder 82 shown in FIG. 8 is driven to engage the positioning member 81a and the engaging pin 85. Thus, the first plate cylinder 11 is positioned and fixed at a predetermined rotational angle position via the driven roller 77.
[0046]
Thereafter, the pressing plate 62 in the release mechanism 49 is moved from the position indicated by the two-dot chain line in FIG. 7 to the position indicated by the solid line by driving the air cylinder 61. As a result, the pressing pin 57 of the rotation preventing member 47 moves upward and the lever 54 swings about the shaft 53, so that the engagement pin 55 of the rotation preventing member 47 and the notch portion of the rotating plate 46. Engage. Accordingly, the rotation of the first plate cylinder 11 is prevented. Thereafter, the air cylinder 82 is driven to disengage the positioning member 81a from the engaging pin 85.
[0047]
Subsequently, the first plate cylinder 11 is moved from the image recording position to the first printing position by driving the first plate cylinder moving mechanism 31. Along with the movement of the first plate cylinder 11, the rotation preventing member 47 is operated by an operation opposite 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 engaging pin 55 and the notch in the rotating plate 46 is released.
[0048]
That is, as the first plate cylinder 11 moves from the position shown in FIG. 6 to the position shown in FIG. 5, the guide pin 56 of the rotation preventing member 47 slides along the inclined surface 59 of the release member 48, and the lever As the pin 54 swings about the shaft 53, the engaging pin 55 moves outward from the notch in the rotating plate 46. At the same time, the meshing operation of the gear 51 arranged concentrically with the first plate cylinder 11 and the gear 52 arranged concentrically with the first blanket cylinder 13 is started.
[0049]
At this time, along with the start of the meshing operation of the gear 51 disposed concentrically with the first plate cylinder 11 and the gear 52 disposed concentrically with the first blanket cylinder 13, the above-described operation is performed. 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. . For this reason, it is possible to prevent the gears 51 and 52 from colliding and being damaged.
[0050]
As shown in FIG. 4, when the first plate cylinder 11 returns to the first printing position, the gear 51 and the first blanket cylinder 13 disposed concentrically with the first plate cylinder 11. And the gear 52 arranged concentrically with each other completely mesh with each other.
[0051]
Referring again to FIG. 1, a plate supply unit 23 and a plate discharge unit 24 are arranged around the first plate cylinder 11 or the second plate cylinder 12 moved to the image recording position.
[0052]
In the plate supply unit 23, a supply cassette 63 that stores a long roll-shaped printing plate on which no image is recorded in a light-tight state, and a front end portion of the printing plate drawn out from the supply cassette 63 is a first plate. A guide member 64 and a guide roller 65 for guiding the surface of the cylinder 11 or the second plate cylinder 12 and a cutter 66 for cutting a long printing plate into a sheet-like printing plate are provided. ing. Further, the first and second plate cylinders 11 and 12 are provided with a pair of gripping claws (not shown) for holding the leading end portion and the trailing end portion of the printing plate supplied from the plate feeding portion 23. .
[0053]
The plate discharging unit 24 discharges the printing plate peeled off by the action of the nail mechanism 73 for peeling off the printing plate held on the first plate cylinder 11 or the second plate cylinder 12 after the printing is completed. And a conveyor mechanism 69 for conveying to the cassette 68.
[0054]
The leading end portion of the printing plate drawn out from the supply cassette 63 in the plate supply unit 23 is guided by the guide roller 65 and the guide member 64, and is held in one holding nail of the first plate cylinder 11 or the second plate cylinder 12. It is done. Then, the first plate cylinder 11 or the second plate cylinder 12 is rotated by driving the plate cylinder rotation mechanism 30, and the printing plate is wound around the outer periphery of the first plate cylinder 11 or the second plate cylinder 12. Then, the rear end portion of the printing plate cut by the cutter 66 is held by the other holding nail. In this state, as described above, the first plate cylinder 11 or the second plate cylinder 11 is rotated by the image recording device 25 while the first plate cylinder 11 or the second plate cylinder 12 is rotated at a low speed by driving the plate cylinder rotating mechanism 30. The surface of the printing plate held on the outer periphery of the second plate cylinder 12 is irradiated with a modulated laser beam to record an image.
[0055]
As shown in FIG. 10A, the printing plate P mounted on the outer periphery of the first plate cylinder 11 has an image area 67a for printing with black ink as shown in FIG. An image area 67b for printing with magenta ink is recorded. Further, the printing plate P mounted on the outer periphery of the second plate cylinder 12 has an image area 67c for printing with cyan ink by the image recording device 25 as shown in FIG. An image area 67d for printing with yellow ink is recorded. The image area 67a and the image area 67b are recorded at positions where the image area 67a and the image area 67b are evenly distributed (that is, 180 degrees apart from each other) when mounted on the outer periphery of the first plate cylinder 11. Similarly, the image area 67c and the image area 67d are recorded at positions where the image area 67c and the image area 67d are evenly distributed (ie, 180 degrees apart from each other) when mounted on the outer periphery of the second plate cylinder 12. The
[0056]
In the embodiment described above, in order to simplify the configuration of the first plate cylinder 11 or the second plate cylinder 12, it is held on the outer periphery of the first plate cylinder 11 or the second plate cylinder 12. Two image areas 67a, 67b or 67c, 67d are provided on one printing plate P. However, the first plate cylinder 11 or the second plate cylinder 1 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. A configuration may be adopted in which each of the cylinders 12 holds two printing plates P. Also in this case, the first printing is performed with the two printing plates P being equally distributed so that the image areas of the printing plates P are evenly distributed (that is, 180 ° apart from each other). It is necessary to hold on the plate cylinder 11 or the second plate cylinder 12.
[0057]
Referring to FIG. 1 again, as described above, around the first plate cylinder 11 moved to the first printing position, the ink supply device 20a and the ink supply device 20b are also used for the second printing. Around the second plate cylinder 12 moved to the position, an ink supply device 20c and an ink supply device 20d are arranged. Each of these ink supply devices 20a, 20b, 20c and 20d (referred to collectively as “ink supply device 20”) includes a plurality of ink rollers 71 and ink fountains 72.
[0058]
Further, around the first plate cylinder 11 moved to the first printing position, the dampening water supply device 21a and the dampening water supply device 21b are also moved to the second printing position. A fountain solution supply device 21 c and a fountain solution supply device 21 d are arranged around the plate cylinder 12. These dampening water supply devices 21 a, 21 b, 21 c and 21 d (referred to collectively as “dampening water supply device 21”) are supplied before ink is supplied to the printing plate P by the ink supply device 20. A dampening solution is supplied to the printing plate P.
[0059]
The ink roller 71 of the ink supply devices 20a and 20b swings by the action of a cam 241 and the like which will be described later. And by this rocking | fluctuation operation | movement, the ink roller 71 of the ink supply apparatus 20a is added to the image area 67a of the two image areas 67a and 67b formed in the printing plate P hold | maintained at the outer peripheral part of the 1st plate cylinder 11. FIG. However, the ink roller 71 of the ink supply device 20b is in contact with the image area 67b so that ink can be supplied to the image areas 67a and 67b. Similarly, the ink rollers 71 of the ink supply devices 20c and 20d also swing by the action of a cam 241 and the like which will be described later. And by this rocking | fluctuation operation | movement, the ink roller 71 of the ink supply apparatus 20c is added to the image area | region 67c of the two image area | regions 67c and 67d formed in the printing plate P hold | maintained at the outer peripheral part of the 2nd plate cylinder 12. FIG. However, the ink roller 71 of the ink supply device 20d is brought into contact with the image area 67d so that ink can be supplied to the image areas 67c and 67d.
On the other hand, of the fountain solution device 21, the fountain solution supply device 21a is in the image area 67a of the printing plate P, the fountain solution supply device 21b is in the image region 67b of the printing plate P, and the fountain solution supply device 21c is The dampening water supply device 21d is configured to supply dampening water to the image area 67c of the printing plate P and the image area 67d of the printing plate P, respectively.
[0060]
FIG. 11 is a schematic view of the ink supply device 20a and the fountain solution supply device 21a as seen from the front side among the ink supply devices 20a, 20b, 20c and 20d and the fountain solution supply devices 21a, 21b, 21c and 21d described above. FIG. 12 is a schematic view of the ink supply device 20a and the fountain solution supply device 21a as seen from the back side. The other ink supply devices 20b, 20c, and 20d and the dampening water supply devices 21b, 21c, and 21d have the same configuration as the ink supply device 20a and the dampening water supply device 21a.
[0061]
Hereinafter, the configuration of the fountain solution supply device 21a will be described.
[0062]
As shown in FIG. 11, the dampening water supply device 21 a includes a water boat 242 that stores dampening water, and a water source roller 243 that pumps up the dampening water by being immersed in the dampening water in the water boat 242. A contact roller 244 that contacts the surface of the printing plate P and supplies dampening water to the image area 67a, and an intermediate roller 245 disposed between the water source roller 243 and the contact roller 244. .
[0063]
As shown in FIGS. 11 and 12, the swim roller 244 is pivotally supported by a pair of left and right first arms 253 that can swing around a shaft 251. The water source roller 243 is pivotally supported by a pair of left and right second arms 254 that can swing around a shaft 252. Further, the intermediate roller 245 is connected to the water source 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.
[0064]
12, the water source roller 243 is provided with a gear 246, the swim roller 244 is provided with a gear 247, and the intermediate roller 245 is provided with a gear 248. These gears 246, 247 are provided. 248 are connected to each other. The gear 247 attached to the swim roller 244 meshes with the gear 51 (see FIGS. 4 to 6) disposed on the first plate cylinder 11. For this reason, the water source roller 243, the swim roller 244, and the intermediate roller 245 are driven by the first plate cylinder 11 and rotate in synchronization with each other.
[0065]
Further, the gear 247 attached to the swim roller 244 is also connected to a gear 249 concentric with the shaft 251 for transmitting the drive to the ink supply device 20a, as will be described later.
[0066]
The dampening water stored in the water boat 242 is transferred from the water source roller 243 to the water application roller 244 via the intermediate roller 245 as the water source roller 243, the water application roller 244, and the intermediate roller 245 rotate. , And supplied to the printing plate P on the first plate cylinder 11.
[0067]
Further, the dampening water supply device 21a has a water-sealing roller moving mechanism 256 for bringing the water-sealing roller 244 into contact with only a necessary area on the printing plate P. FIG. 13 to FIG. 15 are schematic views showing the watering roller moving mechanism 256 extracted from the dampening water supply device 21a shown in FIG.
[0068]
The swim roller moving mechanism 256 moves the swim roller 244 via the first arm 253, and a cam follower 261 that abuts the cam 241 attached to the first plate cylinder 11 at the tip. And a lever 263 that can swing around a shaft 262. The lever 263 is biased in a direction (clockwise) in which the cam follower 261 contacts the cam 241 by the action of the spring 264. A solenoid 265 and a shaft 266 are disposed on the lever 263. Note that the first arm 253 is a printing in which the swim roller 244 is held on the outer periphery of the first plate cylinder 11 via the second arm 254 by the pressing spring unit 284 shown in FIGS. The plate P is biased in a direction (clockwise) in contact with the surface of the plate P.
[0069]
The shaft 262 serving as the pivot center of the lever 263 includes a lever 268 having a contact member 267 that abuts the contact portion 259 of the first arm 253 at the tip, and a lever 271 having a pin 269 at the tip. It is installed. The lever 268 is biased counterclockwise by a spring 273. Moreover, the shaft 262 is penetrated from the front side shown in FIGS. 11 and 13 to the back side shown in FIG. Also on the back side shown in FIG. 12, a lever 268 having a contact member 267 that contacts the contact portion 259 of the first arm 253 is fixed to the shaft 262. Further, the shaft 266 on the lever 263 is provided with a lever 272 whose one end is connected to the solenoid 265 and whose other end contacts the pin 269.
[0070]
FIG. 16 is a side view showing the cam 241 attached to the first plate cylinder 11. The cam 241 indicated by a solid line in FIG. 16 is an image area for printing with magenta ink opposite to the angular position corresponding to the image area 67a for printing with black ink shown in FIG. It is attached to the front side of the first plate cylinder 11 at an angular position corresponding to 67b. The cam 241 rotates together with the first plate cylinder 11 and abuts on the cam follower 261 of the dampening roller moving mechanism 256 in the dampening water supply device 21 a to swing the lever 263 about the shaft 262.
[0071]
In addition, the cam 241 shown by the phantom line in FIG. 16 is used when moving the swim roller 244 in the dampening water supply device 21b. The cam 241 has an angle corresponding to the image area 67a for printing with black ink, opposite to the angle position corresponding to the image area 67b for printing with magenta ink shown in FIG. In position, it is attached to the first plate cylinder 11. The second plate cylinder 12 is also provided with a pair of cams 241 similar to the above.
[0072]
The movement operation of the water application roller 244 in the water application roller movement mechanism 256 of the dampening water supply device 21a is as follows.
[0073]
That is, as shown in FIG. 13, the swim roller 244 faces the image area 67a for printing with black ink, and is disposed at the tip of the cam 241 and the lever 263 attached to the first plate cylinder 11. In a state where the first plate cylinder 11 is in an angular position where the cam follower 261 is not engaged, the first arm 253 is swung by a biasing force of a contact pressure adjusting mechanism 257 to be described later, The roller 244 has moved to a dampening water supply position that comes into contact with the surface of the printing plate P held on the outer periphery of the first plate cylinder 11. Therefore, the swim roller 244 contacts the image area 67a for printing with the black ink shown in FIG.
[0074]
In this state, when the first plate cylinder 11 rotates, the water source roller 243, the swim roller 244, 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 water boat 242 is transferred from the water source roller 243 to the swim roller 244 via the intermediate roller 245, and the image area 67 a in the printing plate P on the first plate cylinder 11. Supplied to the entire surface.
[0075]
On the other hand, as shown in FIG. 14, the swim roller 244 faces the image area 67b for printing with magenta ink, and is disposed at the tip of the cam 241 and the lever 263 attached to the first plate cylinder 11. When the first plate cylinder 11 rotates to an angular position where the cam follower 261 is opposed to the cam follower 261, the cam follower 261 rides on the cam 241 so that the lever 263 swings counterclockwise about the shaft 262. . As the lever 263 swings counterclockwise, the solenoid 265 and the lever 272 disposed on the lever 263 move, and the lever 272 presses the contact pin 269 disposed at the tip of the lever 271. . Due to the pressing force to the contact pin 269, the lever 271 rotates together with the shaft 262, so that the lever 268 swings counterclockwise about the shaft 262.
[0076]
As the lever 268 swings, the contact member 267 disposed at the tip of the lever 268 presses the contact portion 259 of the first arm 253, so that the first arm 253 has a contact pressure described later. It swings counterclockwise against the biasing force of the adjusting mechanism 257. As a result, as shown in FIG. 14, the swim roller 244 moves to a retracted position separated from the surface of the printing plate P held on the outer periphery of the first plate cylinder 11. For this reason, the swim roller 244 in the dampening water supply device 21a does not come into contact with the image area 67b for printing with magenta ink shown in FIG.
[0077]
It should be noted that the amount of movement of the swim roller 244 when the swim roller 244 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 is shown in FIG. It is smaller than the total value of the tooth end of the gear 247 attached to the roller 244 and the tooth end of the gear 51 attached to the first plate cylinder 11. For this reason, as shown in FIG. 14, even when the swim roller 244 is moved to the retracted position, the gear 247 attached to the swim roller 244 and the gear 51 attached to the first plate cylinder 11 The meshing state is maintained. Therefore, even when the swim roller 244 moves to the retracted position, the swim roller 244 is driven by the drive from the first plate cylinder 11 together with the water source roller 243 and the intermediate roller 245 and is synchronized with each other. Rotate.
[0078]
The dampening water supply device 21b is also provided with a watering roller moving mechanism 256 similar to the above. However, the cam follower 261 of the dampening water supply device 21b in the dampening water supply device 21b abuts the cam 241 indicated by the phantom line in FIG. The image area 67b for printing with magenta ink shown in FIG.
[0079]
In this way, by arranging the same number of dampening water supply devices 21 as the ink supply devices 20 corresponding to each image area, the ink of a color different from the color ink to be originally supplied to the image area of the printing plate is provided. It is possible to prevent the phenomenon that the ink adheres and the printed matter is stained.
[0080]
Further, in the swim roller moving mechanism 257, as shown in FIG. 15, when the lever 272 is swung clockwise around the shaft 266 by the action of the solenoid 265 provided in the lever 263, this The engagement between the lever 272 and the contact pin 269 provided at the tip of the lever 271 is released. Therefore, when the cam follower 261 disposed at the tip of the lever 263 rides on the cam 241 attached to the first plate cylinder 11, the lever 263 swings counterclockwise about the shaft 262. Even if it exists, unlike the case shown in FIG. 14, the contact pin 269 is not pressed by this swinging motion. Accordingly, since the first arm 253 does not swing, the printing roller 244 is held on the outer periphery of the first plate cylinder 11 regardless of the rotational angle position of the first plate cylinder 11. Stop at the supply position where it contacts the surface of P.
[0081]
Therefore, for example, when supplying dampening water to both the image areas 67a and 67b of the printing plate P by the dampening water supply device 21a at the time of monochromatic printing described later, as shown in FIG. Due to the operation, the dampening water can be supplied to both the image areas 67a and 67b of the printing plate P by the dampening water supply device 21a by stopping the dampening roller 244 at the supply position.
[0082]
Next, the configuration of the ink supply device 20a according to the present invention will be described. As shown in FIGS. 11 and 12, the ink supply device 20a is disposed above the fountain solution supply device 21a.
[0083]
FIG. 17 is a further enlarged view of the main part of FIG. 11, and is a schematic view of the ink supply device 20a as seen from the front side of FIG. 18 is a further enlarged view of the main part of FIG. 12, and is a schematic view of the ink supply device 20a seen from the back side of FIG. In FIG. 18, the illustration of the ink roller 71 and the like is omitted.
[0084]
The ink supply device 20a has three ink deposits for supplying ink to the printing plate P by contacting the ink base roller 290 constituting the ink fountain 72 and the printing plate P mounted on the first plate cylinder 11. The ink on the ink base roller 290 is transferred to the ink kneading roller 296 and the three ink kneading rollers 294, 295, and 296 that knead the ink by the rollers 291, 292, and 293, and the swinging motion that reciprocates in the axial direction. An ink calling roller 297 and two ink transfer rollers 298 and 299. In this embodiment and FIG. 1, these rollers 290, 291, 292, 293, 294, 295, 296, 297, 299 and 299 are collectively referred to as “ink roller 71”.
[0085]
The ink supply device 20 a including the ink roller 71 and the ink fountain 72 is directly or indirectly supported by the pair of left and right side plates 315. The pair of left and right side plates 315 swings between the position indicated by the solid line and the position indicated by the two-dotted line in FIGS. 17 and 18 around the shaft 251 described above by driving the pair of left and right air cylinders 316. It is configured to be possible. Accordingly, the entire ink supply device 20a is swung by driving the pair of left and right air cylinders 316.
[0086]
Of the ink rollers 71 described above, the ink form roller 291 is pivotally supported by a pair of left and right arms 302 that swing about the shaft 301. Further, 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 form roller 291 contacts the first plate cylinder 11. Further, the arm 302 is provided with a pair of left and right contact members 306 that come into contact with a release cam 304 of an arm swing mechanism described later.
[0087]
The ink form roller 292 is pivotally supported by a pair of left and right arms 308 that swing about a shaft 307. The arm 308 is biased by a pair of left and right springs 309 in a direction (counterclockwise in FIG. 17) in which the ink form roller 292 contacts the first plate cylinder 11. Further, the arm 308 is provided with a pair of left and right contact members 311 that come into contact with a release cam 305 of an arm swing mechanism described later.
[0088]
Further, the ink form roller 293 is pivotally supported by a pair of left and right arms 312 that swing about a shaft 307. Further, the arm 312 is urged by a pair of left and right springs 313 in a direction in which the ink form roller 293 contacts the first plate cylinder 11 (clockwise in FIG. 17). Further, a pair of left and right contact members 314 that come into contact with a release cam 305 of an arm swing mechanism described later is attached to the arm 312.
[0089]
As shown in FIG. 18, a gear 319 that meshes with a gear 318 connected to a motor is attached to the back side of the shaft 317 of the ink source roller 290. For this reason, the ink base roller 290 rotates by receiving the drive of the motor. A gear 321 is attached to the front side of the shaft 317 of the ink source roller 290.
[0090]
The ink calling roller 297 is pivotally supported by a substantially Y-shaped arm 323 that can swing around a shaft 322. A cam follower 325 is attached to the arm 323. On the other hand, a cam 328 is attached to a shaft 327 of a gear 326 that rotates in synchronization with the ink source roller 290 by meshing with a gear 321 attached to the ink source roller 290. The arm 323 is biased by a spring 324 in a direction in which the cam follower 325 contacts the cam 328 (clockwise direction shown in FIG. 17). For this reason, the ink calling roller 297 reciprocates between a position in contact with the ink base roller 290 and a position in contact with the ink kneading roller 296 as the ink base roller 290 rotates.
[0091]
As shown in FIG. 18, gears 331, 332, and 333 are disposed on the back side of the ink kneading rollers 294, 295, and 296, respectively. These gears 331, 332, and 333 are concentric with the shaft 251 for transmitting driving from the dampening water supply device 21 a to the ink supply device 20 a via the drive transmission gears 334, 335, and 336. A gear 249 is connected. Accordingly, the ink kneading rollers 294, 295, and 296 are configured to rotate in synchronization with the first plate cylinder 11 by these gears 331, 332, 333, 334, 335, 336, and 249.
[0092]
In the ink supply device 20a, the ink stored in the ink fountain 72 is transferred from the ink base roller 290 to the ink kneading roller 296 by the ink calling roller 297, and the ink kneading rollers 294, 295, 296 and the ink transfer rollers 298, After being kneaded by 299, the ink is supplied to the printing plate P mounted on the first plate cylinder 11 through the ink form rollers 291 292, and 293.
[0093]
Next, an arm swing mechanism in the ink supply device 20a will be described. 19 and 20 are explanatory views showing the swinging operation of the arms 302, 308, and 312 by the arm swinging mechanism, and FIGS. 21 and 22 are plan views of the main part of the arm swinging mechanism.
[0094]
As shown in these drawings, the release cam 304 that contacts the contact member 306 is fixed to the shaft 337, and the release cam 305 that contacts the contact members 311 and 314 is fixed to the shaft 338. These shafts 337 and 338 are rotatably supported by a pair of left and right side plates 315 shown in FIGS. The shaft 337 is fixedly provided with an arm 342 having a cam follower 341 that comes into contact with the above-described cam 241 at the tip, and the shaft 338 has a cam follower 343 that comes into contact with the cam 241 mentioned above. The arm 344 which has is fixed. 21 and 22, for convenience of explanation, the cam 241 to be disposed on the back side of the cam followers 341 and 343 is illustrated on the side of the cam follower 343.
[0095]
Bearings 345 are respectively disposed at one ends of the shafts 337 and 338, and the bearings 345 are coupled to each other by a coupling member 347 connected to the air cylinder 346. Therefore, the shafts 337 and 338 are driven by the air cylinder 346, and the contact positions where the cam followers 341 and 343 and the cam 241 shown in FIG. 21 can come into contact with each other, and the cam followers 341 and 343 shown in FIG. It reciprocates in synchronism with the axial direction between the retracted position where the cam 241 cannot come into contact.
[0096]
A pair of stoppers 348 that can be engaged with both ends of the lever 351 are disposed at the other ends of the shafts 337 and 338. As shown in FIG. 18, the lever 351 is connected to a solenoid 352 via a connecting member 353 and can swing around a shaft 349 by driving the solenoid 352.
[0097]
In such a configuration, as shown in FIG. 19, when the cam 241 disposed on the first plate cylinder 11 and the cam followers 341 and 343 are not in contact with each other, the above-described arms 302, 308, 312 is urged by springs 303, 309, and 313, and the ink form rollers 291, 292, and 293 disposed therein are placed on the surface of the printing plate P mounted on the outer periphery of the first plate cylinder 11. The ink supply position is in contact with the ink supply position.
[0098]
When the first plate cylinder 11 rotates from this state and the cam 241 disposed on the first plate cylinder 11 comes into contact with the cam follower 341, the arm 342 fixed to the shaft 337 is moved together with the shaft 337. Rotate. As the shaft 337 rotates, the release cam 304 fixed to the shaft 337 also rotates in the clockwise direction shown in FIG. By the rotation of the release cam 304, the contact member 306 attached to the arm 302 is pressed by the release cam 304, and the arm 302 is an ink in which the ink form roller 291 disposed there abuts against the surface of the printing plate. As shown in FIG. 20, the supply position moves to a retracted position separated from the surface of the printing plate P mounted on the first plate cylinder 11.
[0099]
When the first plate cylinder 11 further rotates from this state and the cam 241 disposed on the first plate cylinder 11 also contacts the cam follower 343, the arm 344 fixed to the shaft 338 is moved to the shaft 338. Rotate with. As the shaft 338 rotates, the release cam 305 fixed to the shaft 338 also rotates in the clockwise direction shown in FIG. By the rotation of the release cam 305, the contact members 311 and 314 attached to the arms 308 and 312 are sequentially pressed by the release cam 304, and the arms 308 and 312 are moved to the ink form rollers 292 and 293 provided there. Are sequentially moved from the ink supply position that contacts the surface of the printing plate P to a retreat position that is separated from the surface of the printing plate P, as shown in FIG.
[0100]
On the other hand, if the first plate cylinder 11 further rotates and the contact state between the cam 241 and the cam followers 341 and 343 disposed on the first plate cylinder 11 is sequentially released, the operation opposite to the above is performed. As a result, the arms 302, 308, 312 are sequentially moved to the ink supply position where the ink form rollers 291, 292, 293 disposed thereon contact the surface of the printing plate P.
[0101]
Here, as described above, the cam 241 is used 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. It is arranged at an angular position corresponding to the image area 67b. Accordingly, each of the ink form rollers 291, 292, and 293 prints in front of the start end portion of the image area 67 a for printing with black ink by the swing operation of the arms 302, 308, and 312 by the arm swing mechanism described above. It descends on the surface of the plate P, and ascends from the surface of the printing plate P behind the end of the image area 67a.
[0102]
Therefore, according to the above-described configuration, the ink is supplied by sequentially bringing the three ink form rollers 291, 292, and 293 into contact with the upper surface of the printing plate P. It is possible to supply the ink sufficiently without unevenness, and it is possible to prevent the printing accuracy from being deteriorated due to the vibration accompanying the elevation of the roller or the like.
[0103]
In this printing apparatus, as will be described later, for example, when performing monochrome printing only with black ink, the above-described ink supply apparatus 20a causes both of the image areas 67a and 67b shown in FIG. It is necessary to supply black ink. In this case, due to the action of the air cylinder 346, the cam followers 341 and 343 and the cam 241 shown in FIG. 22 come into contact with each other from the contact position where the cam followers 341 and 343 and the cam 241 shown in FIG. The shafts 337 and 338 are moved in the axial direction to an impossible retreat position.
[0104]
In the state where the shafts 337 and 338 are arranged at the positions shown in FIG. 22, the cam followers 341 and 343 and the cam 241 are out of phase with each other as shown in FIG. Regardless of the rotation of 241, the cam followers 341 and 343 and the cam 241 do not contact each other. Accordingly, the arms 302, 308, 312 are fixed at ink supply positions where the ink form rollers 291 292, 293 are in contact with the surface of the printing plate P. Therefore, black ink can be supplied to both the image areas 67a and 67b by the ink form rollers 291 292, and 293 of the ink supply apparatus 20a.
[0105]
In this printing apparatus, on the contrary to the above, for example, when performing monochromatic printing only with magenta ink, both the image areas 67a and 67b shown in FIG. Will be supplied with magenta ink. In this case, it is necessary to keep the ink form rollers 291, 292 and 293 of the ink supply device 20 a away from the surface of the printing plate P regardless of the rotation of the cam 241 accompanying the rotation of the first plate cylinder 11. is there. In this case, the lever 351 and the stopper 348 fixed to the shafts 337 and 338 are used.
[0106]
23 to 25 are explanatory views showing operations of the lever 351 and the stopper 348 shown in FIG.
[0107]
When the cam followers 341 and 343 come into contact with the cam 241, the shafts 337 and 338 rotate and the ink form rollers 291, 292, 293 are separated from the surface of the printing plate P. Along with the rotation of 338, the stopper 348 also rotates. FIG. 23 shows an arrangement relationship between the pair of stoppers 348 and the lever 351 in such a state.
[0108]
On the other hand, when the cam followers 341 and 343 are separated from the cam 241, the shafts 337 and 338 are returned to their original angular positions, and the ink form rollers 291, 292, and 293 are in contact with the surface of the printing plate P. In some cases, the stopper 348 rotates to the original angular position in accordance with the returning operation of the shafts 337 and 338 described above. FIG. 24 shows an arrangement relationship between the pair of stoppers 348 and the lever 351 in such a state.
[0109]
In order to keep the ink form rollers 291, 292 and 293 of the ink supply device 20 a apart from the surface of the printing plate P regardless of the rotation of the cam 241 accompanying the rotation of the first plate cylinder 11, In a state where the followers 341 and 343 are in contact with the cam 241 and the pair of stoppers 348 are at the angular positions shown in FIG. 23, the lever 351 is rotated clockwise through the connecting member 353 by driving the solenoid 352. . Then, as shown in FIG. 25, both end portions of the lever 351 engage with the convex portions of the stopper 348, and the stopper 348 is fixed by the lever 351.
[0110]
In such a state, the cam followers 341 and 343 move away from the cam 241 as the first plate cylinder 11 rotates, so that even if the shafts 337 and 338 return to their original angular positions, Since the pair of stoppers 348 fixed to the shafts 337 and 338 are fixed by the lever 351, the rotation of the shafts 337 and 338 is prevented. Therefore, as described above, each of the arms 302, 308, 312 remains fixed at the retracted position, and regardless of the rotation of the cam 241 accompanying the rotation of the first plate cylinder 11, the ink form rollers 291, 292, 293 is separated from the surface of the printing plate P.
[0111]
Therefore, for example, when performing monochromatic printing using only magenta ink, contact between the ink form rollers 291, 292, and 293 of the ink supply device 20a and the image areas 67a and 67b shown in FIG. Only the magenta ink can be supplied from the ink supply device 20a to both the image areas 67a and 67b.
[0112]
The driving operation of the lever 351 and the stopper 348 by driving the solenoid 352 described above is controlled by the control unit 140 described later.
[0113]
The stopper 348 fixed to the lever 351 and the shafts 337 and 338 described above stops the ink form rollers 291, 292, and 293 at the retracted positions when the entire ink supply device 20 a is moved by the air cylinder 316. It also functions as a stop mechanism according to the present invention for preventing each of the ink form rollers 291, 292, 293 from contacting the printing plate P mounted on the first plate cylinder 11.
[0114]
That is, the ink supply device 20a including the ink roller 71 and the ink fountain 72 is opposed to the first plate cylinder 11 indicated by a solid line in FIGS. 17 and 18 together with a pair of left and right side plates 315 around the shaft 251. It is configured to be swingable between the position and a separation position separated from the first plate cylinder 11 indicated by a two-dot chain line in FIGS. 17 and 18. By adopting such a configuration, the ink roller 71 and the ink fountain 72 in the ink supply device 20a can be easily replaced or cleaned at the separation position.
[0115]
On the other hand, in such a configuration, when the entire ink supply device 20a is moved to the opposite position, the ink form rollers 291 292, and 293 are mounted on the first plate cylinder 11 as the ink supply device 20a moves. When the printing plate P is in direct contact with the central portion of the image area 67a, ink supply unevenness occurs in the central portion of the image area 67a. For this reason, in this printing apparatus, the ink form rollers 291, 292 and 293 are sequentially brought into contact with the printing plate P mounted on the first plate cylinder 11 by the following operation.
[0116]
That is, after exchanging and cleaning the ink roller 71 and the ink fountain 72 in the ink supply device 20a at the separation position, the lever 351 is rotated by driving the solenoid 352 before moving the ink supply device 20a to the opposite position. As shown in FIG. 25, both ends of the lever 351 are engaged with the convex portions of the stopper 348 so that the stopper 348 is fixed. Then, the ink supply device 20a is moved from the separation position to the facing position.
[0117]
In this state, as described above, since the rotation of the shafts 337 and 338 is prevented, the arms 302, 308 and 312 remain fixed at the retracted positions, and the first plate cylinder 11 is rotated. Regardless of the rotation of the cam 241, the ink form rollers 291, 292, and 293 are separated from the surface of the printing plate P. Accordingly, it is possible to prevent the ink form rollers 291, 292, and 293 from coming into direct contact with the printing plate P mounted on the first plate cylinder 11 as the ink supply device 20 a moves.
[0118]
Then, for example, as shown in FIG. 20, if the cam 241 moves to an angular position facing the cam followers 341 and 343 fixed to the shafts 337 and 338, the lever 351 is rotated by driving the solenoid 352, and FIG. As shown in FIG. 4, the engagement between both end portions of the lever 351 and the convex portion of the stopper 348 is released. In this state, if the cam 241 rotates with the rotation of the first plate cylinder 11, the engagement between the cam 341 and the cam followers 341 and 343 is sequentially released, and as shown in FIG. Rotates together with the stopper 348, and the respective ink form rollers 291, 292, and 293 sequentially come into contact with predetermined positions of the printing plate P mounted on the first plate cylinder 11. Accordingly, it is possible to prevent ink supply unevenness with respect to the printing plate P.
[0119]
The function of the lever 351 and the stopper 348 as a stop mechanism according to the present invention is applied to the ink supply device 20c for supplying cyan ink to the printing plate P mounted on the second plate cylinder 12. An application example in this case will be further described. 26 to 29 are explanatory diagrams illustrating the movement operation of the ink supply device 20c from the separation position to the facing position. In the following description relating to the ink supply device 20c, the same parts as those of the ink supply device 20a will be described using the same reference numerals.
[0120]
As shown in FIG. 1, the ink supply device 20c is disposed in the moving path of the second plate cylinder 12 by the second plate cylinder moving mechanism 32 described above. Therefore, in order to prevent interference between the second plate cylinder 12 and the ink supply device 20c when the second plate cylinder 12 is moved, the second plate cylinder 12 is moved by the second plate cylinder moving mechanism 32. Needs to move the ink supply device 20c from the facing position facing the second plate cylinder 12 to the separation position.
[0121]
FIG. 26 shows a state in which the ink supply device 20c is arranged at the separation position. In this state, as shown in FIG. 25, both end portions of the lever 351 are engaged with the convex portions of the stopper 348, and the pair of stoppers 348 are fixed by the lever 351. Then, as shown in FIG. 27 for the front side and FIG. 28 for the back side, the ink supply device 20c is moved to the opposite position by driving the air cylinder 316.
[0122]
In this state, the pair of stoppers 348 are fixed by the lever 351. For this reason, as shown in FIG. 28, as in the case of the ink supply device 20a described above, the release cam 304 rotates about the shaft 337 to press the contact member 306, and the release cam 305 is the shaft 338. And the contact members 311 and 314 are pressed. For this reason, as shown in FIGS. 27 and 28, each of the ink form rollers 291, 292, and 293 is attached to the second plate cylinder 12 even when the ink supply device 20 c is disposed at the opposing position. It is not in contact with P.
As in the case of the ink supply device 20a described above, the angle at which the cam 241 disposed on the second plate cylinder 12 faces the cam followers 341 and 343 fixed to the shafts 337 and 338 of the ink supply device 20c. When moved to the position, the lever 351 is rotated by driving the solenoid 352, and the engagement between the both end portions of the lever 351 and the convex portion of the stopper 348 is released.
[0123]
In this state, when the cam 241 rotates with the rotation of the second plate cylinder 12, the engagement between the cam 341 and the cam followers 341 and 343 is sequentially released, and as shown in FIG. 291, 292, and 293 sequentially come into contact with predetermined positions of the printing plate P mounted on the second plate cylinder 12. Accordingly, it is possible to prevent ink supply unevenness with respect to the printing plate P.
[0124]
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 disposed. The development processing device 26 includes a development unit, a fixing unit, and a diaphragm unit, and is configured to be movable up and down between a standby position indicated by a two-dot chain line and a development processing position indicated by a solid line in FIG.
[0125]
When the printing plate P on which an image is recorded by the image recording device 25 is developed by the development processing device 26, the printing plate rotating mechanism 30 is driven to rotate together with the first plate cylinder 11 or the second plate cylinder. The developing unit, the fixing unit, and the diaphragm unit are sequentially brought into contact with the printing plate P.
[0126]
The first and second blanket cylinders 13 and 14 provided so as to be in contact with the first and second plate cylinders 11 and 12 have the same diameter as the first and second plate cylinders 11 and 12. A blanket for ink transfer is mounted on the outer periphery. The first and second blanket cylinders 13 and 14 can be brought into contact with and separated from the first and second plate cylinders 11 and 12 and the impression cylinder 15 by a cylinder insertion mechanism described later.
[0127]
FIG. 30 is a schematic view showing a trunking mechanism of the first blanket cylinder 13. In addition, the cylinder insertion mechanism of the second blanket cylinder 14 has the same configuration as the cylinder insertion mechanism of the first plate cylinder 13 shown in FIG.
[0128]
An eccentric shaft 102 having a center different from that of the shaft 101 is connected to the side of the shaft 101 that rotatably supports the first blanket cylinder 13. Further, an eccentric bearing 103 having a different center from that of the shafts 101 and 102 is disposed around the eccentric shaft 102. Therefore, as shown in FIG. 30, the center 104 of the shaft 101 (ie, the center of the first blanket cylinder 13) 104, the center 105 of the eccentric shaft 102, and the center 106 of the eccentric bearing 103 are in different positions. Be placed.
[0129]
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 tip of the cylinder rod 114 of the air cylinder 113 is connected to the connecting portion of the two connecting plates 111 and 112. The air cylinder 113 main body is connected to one end of a rotating plate 116 that rotates about a shaft 115. Further, the other end of the rotating plate 116 is connected to a fixed plate 118 fixed to the eccentric bearing 103 via a rod 117.
[0130]
The rotating plate 116 and the shaft 120 of the eccentric member 119 are connected by two connecting plates 121 and 122 constituting a link mechanism. The tip of the cylinder rod 124 of the air cylinder 123 fixed to the apparatus main body is connected to the connecting portion of the two connecting plates 121 and 122. Further, the worm wheel 125 connected to the eccentric member 119 is screwed with a worm gear 127 that rotates by driving of the motor 126.
[0131]
In such a configuration, when the cylinder rods 114 and 124 of the air cylinders 113 and 123 are extended, as shown in FIG. 30, the surface of the first blanket cylinder 13, the first plate cylinder 11 and the impression cylinder. It is separated from the 15 surface by a small distance.
[0132]
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 plate cylinder 11 by the action of the link mechanism by the two connecting plates 111, 112 and the like. The first plate cylinder 11 is moved in the direction.
[0133]
In this state, when the cylinder rod 124 is contracted by driving the air cylinder 123, the first blanket cylinder 13 is moved to the impression cylinder 15 by the action of the link mechanism constituted by the two connecting plates 121, 122 and the like. It moves in the direction and the cylinder is put 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 moves not only in the impression cylinder 15 direction but also in the first plate cylinder 11 direction. Accordingly, the cylinder blanking state of the first plate cylinder 11 in the first blanket cylinder 13 is maintained.
[0134]
In addition, when the eccentric member 119 is rotated, the shaft 120 of the eccentric member 119 slightly moves. Therefore, the worm wheel 125 connected to the eccentric member 119 is rotated by driving the motor 126 and the shaft 120 is finely moved, so that the contact between the impression cylinder 15 and the first plate cylinder 11 and the first blanket cylinder 13 is achieved. The pressure can be adjusted. Therefore, it is possible to adjust the printing pressure during printing using the first blanket cylinder 13.
[0135]
Referring to FIG. 1 again, the blanket cleaning device 29 disposed between the first and second blanket cylinders 13 and 14 has a path from the unwinding roll to the winding roll via a plurality of pressure rollers. The cleaning liquid is supplied to the pasted long cleaning cloth, and the cleaning cloth is brought into contact with the first and second blanket cylinders 13 and 14 and then slid, whereby the first and second The surface of the blanket cylinders 13 and 14 is cleaned. In addition, the surface of the impression cylinder 15 may be cleaned by bringing the cleaning cloth into contact with the surface of the impression cylinder 15 as well.
[0136]
The impression cylinder 15 provided so as to be in contact with the first and second blanket cylinders 13 and 14 has diameters of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14. It has a diameter of 1/2. The impression cylinder 15 has a gripper (not shown) for holding and transporting the leading edge of the printing paper.
[0137]
In addition, the sheet feeding cylinder 16 disposed adjacent to the impression cylinder 15 has the same diameter as the impression cylinder 15. The paper feed cylinder 16 conveys the leading end of the printing paper supplied one by one from the paper feed unit 27 by the reciprocating suction plate 74 by a gripper (not shown). The leading edge of the printing paper held by the gripper is held by the gripper of the impression cylinder 15 when the printing paper is transferred from the paper feeding cylinder 16 to the impression cylinder 15.
[0138]
Further, 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 are wound around both ends thereof, and grippers are respectively disposed 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 pressure drum 15 is held by any gripper of the paper discharge drum 17 when the printing paper is transferred from the pressure drum 15 to the paper discharge drum 17. The printing paper is transported onto the paper discharge unit 28 as the chain 19 moves and is discharged.
[0139]
The paper feed cylinder 16 is connected to a drive motor via a belt (not shown). The paper feed cylinder 16, the pressure drum 15, the paper discharge cylinder 17, and the first and second blanket cylinders 13 and 14 are connected to each other by gears attached to the ends thereof. 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 are: As described above, the gears 51 and 52 attached to the end portions are connected to each other. Accordingly, the drive cylinder (not shown) drives the feed cylinder 16, the impression cylinder 15, the discharge cylinder 17, the first and second blanket cylinders 13 and 14, and the first and second plate cylinders 11 and 12. , Rotate in sync with each other.
[0140]
FIG. 31 is a block diagram showing the main electrical configuration of the printing apparatus. The printing apparatus includes a control unit 140 including a ROM 141 that stores an operation program necessary for controlling the apparatus, a RAM 142 that temporarily stores data and the like during control, and a CPU 143 that executes logical operations. The control unit 140 is connected to the ink supply device 20, the image recording device 25, the development processing device 26, the blanket cleaning device 29, the first and second plate cylinder moving mechanisms 31, 32, first, The second blanket cylinders 13 and 14 are connected to a drive circuit 145 that generates a drive signal for a drive unit and the like in the case insertion mechanism and the like. The printing apparatus is controlled by the control unit 140 and executes a plate making operation and a printing operation, which will be described later.
[0141]
Next, plate making and printing operations by this printing apparatus will be described. FIG. 32 is a flowchart showing an outline of plate making and printing operations by this printing apparatus. The printing and plate making operations are for the case where multicolor printing is performed on printing paper with four colors of inks of yellow, magenta, cyan, and black.
[0142]
First, a plate making process is performed in which an image is recorded on the printing plate P on the first and second plate cylinders 11 and 12 and development processing is performed (step S1). This plate making process is executed according to the process shown in the flowchart of FIG. 33 as a subroutine.
[0143]
That is, first, the first plate cylinder 11 is moved to the plate making position indicated by a two-dot chain line in FIG. 1 (step S11). The movement of the first plate cylinder 11 is executed 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.
[0144]
Next, the printing plate P is supplied to the outer periphery of the first plate cylinder 11 (step S12). The supply of the printing plate P is executed by holding the leading portion of the printing plate P drawn from the supply cassette 63 and the rear end portion of the printing plate P cut by the cutter 66 with a pair of gripping claws (not shown).
[0145]
Subsequently, an image is recorded on the printing plate P held on the outer periphery of the first plate cylinder 11 (step S13). This image is recorded by rotating the first plate cylinder 11 at a low speed by the plate cylinder rotating mechanism 30 and modulating the laser from the image recording device 25 to the printing plate P held on the outer periphery of the first plate cylinder 11. This is performed by irradiating the beam.
[0146]
Next, the printing plate P on which the image is recorded is developed (step S14). In this development processing, after the development processing device 26 is raised from the standby position indicated by the two-dot chain line in FIG. 1 to the development processing position indicated by the solid line, the plate cylinder rotation mechanism 30 is driven to rotate together with the first plate cylinder 11. The printing plate P is executed by bringing the developing unit, the fixing unit, and the aperture unit into contact with each other in order.
[0147]
When the developing process is completed, the first plate cylinder 11 is moved to the first printing position indicated by the solid line in FIG. 1 (step S15).
[0148]
Subsequently, a plate making process for the printing plate P held on the outer periphery of the second plate cylinder 12 is performed by the same operation as in steps S11 to 15 (steps S16 to S20). And if the plate making to the printing plate P hold | maintained on the outer periphery of the 1st, 2nd plate cylinders 11 and 12 is complete | finished, a plate making process will be complete | finished.
[0149]
Referring to FIG. 32 again, when the plate making process is completed, a printing process for printing on printing paper using printing plates P on the first and second plate cylinders 11 and 12 is executed (step S2). The operation of the printing apparatus in this printing process will be described in detail later.
[0150]
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, the first plate cylinder 11 is first moved to a plate making position indicated by a two-dot chain line in FIG. Then, the first cylinder 11 is rotated counterclockwise by the plate cylinder rotating mechanism 30 and the end portion 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 discharged into the discharge cassette 68. Then, after the first plate cylinder 11 is returned to the first printing position, the second plate cylinder 12 is moved from the second printing position to the plate-making position, and the same operation as described above is executed. The printing plate P held on the second plate cylinder 12 is discharged into the discharge cassette 68.
[0151]
When the discharge process of the printing plate P is completed, the first and second blanket cylinders 13 and 14 are washed (step S4). When the first and second blanket cylinders 13 and 14 are cleaned, the first and second blanket cylinders 13 and 14 are moved to the first and second plate cylinders 11 and 12 and the pressure by the cylinder insertion mechanism shown in FIG. After being separated from the cylinder 15, the first and second blanket cylinders 13 and 14 are rotated. In this state, the cleaning cloth supplied with the cleaning liquid in the blanket cleaning device 29 is brought into contact with the surfaces of the first and second blankets 13 and 14 and then slid to thereby move the first and second blanket cylinders. 13 and 14 are washed.
[0152]
When the cleaning of the first and second blanket cylinders 13 and 14 is completed, it is confirmed whether or not another print product is to be printed (step S5). When other printing work is performed, the operations in steps 1 to 4 are repeated.
[0153]
When the printing operation is completed, the ink is washed (step S6). This ink cleaning is performed by removing and cleaning ink adhering to the ink roller 71 and the ink fountain 72 in each ink supply device 20 by an ink cleaning device (not shown) disposed in each ink supply device 20. .
[0154]
When the ink cleaning process is completed, all processes are completed.
[0155]
Next, the operation of the printing apparatus in the printing process described above will be described. 34 to 39 are explanatory views showing the printing operation of this printing apparatus. In these drawings, for convenience of explanation, the length of the printing paper S and the peripheral lengths of the impression cylinder 15, the paper feed cylinder 16, and the paper discharge cylinder 17 are expressed as being the same. The length of the printing paper S is shorter than the circumferential length of the impression cylinder 15, the paper feed cylinder 16 and the paper discharge cylinder 17.
[0156]
Note that the printing operation described below is for multi-color printing on four-color inks of yellow, magenta, cyan, and black, as described above. In FIGS. 34 to 39, for convenience of explanation, the area of the first plate cylinder 11 and the first blanket cylinder 13 on the side used for printing the black ink is denoted by reference sign K, The region of the plate cylinder 11 and the first blanket cylinder 13 on the side used for printing magenta ink is marked with M, and the second plate cylinder 12 and the second blanket cylinder 14 are cyan. The area of the side used for printing the ink of C is marked with C, and the area of the second plate cylinder 12 and the second blanket cylinder 14 used for printing of yellow ink is marked with Y. doing.
[0157]
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 printed with black ink as shown in FIG. An image area 67a for printing 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 is shown in FIG. ), An image area 67c for printing with cyan ink and an image area 67d for printing with yellow ink are recorded.
[0158]
As described above, the ink supply device 20a is black ink, the ink supply device 20b is magenta ink, the ink supply device 20c is cyan ink, and the ink supply device 20d is yellow ink. The black ink is supplied from the ink supply device 20a to the image area 67a of the printing plate P shown in FIG. 10, the magenta ink is supplied from the ink supply device 20b to the image area 67b, and the ink is supplied to the image area 67c. Cyan ink is supplied from the supply device 20c, and yellow ink is supplied from the ink supply device 20d to the image area 67d.
[0159]
First, each fountain solution supply device 21 and each ink supply device 20 are brought into contact only with the corresponding image areas of the printing plates P held on the first and second plate cylinders 11 and 12. Accordingly, dampening water is supplied from the corresponding dampening water supply devices 21a, 21b, 21c, and 21d to the image regions 67a, 67b, 67c, and 67d, and the image region 67a is supplied from the ink supply device 20a. Black, magenta, cyan, and yellow inks are supplied to the image area 67b from the ink supply apparatus 20b, the image area 67c from the ink supply apparatus 20c, and the image area 67d from the ink supply apparatus 20d, respectively. This ink is then transferred to corresponding areas of the first and second blanket cylinders 13 and 14.
[0160]
By repeating this operation, ink is supplied to the printing plate P and the first and second blanket cylinders 13 and 14 on the first and second plate cylinders 11 and 12. This ink supply operation is repeatedly executed until the printing process is completed.
[0161]
When the ink supply to the printing plates P on the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14 is completed, the printing paper S is supplied as shown in FIG. Supply to the paper cylinder 16. The printing paper S is transferred from the paper feed cylinder 16 to the impression cylinder 15.
[0162]
Then, if the impression cylinder 15 further rotates and the leading edge of the printing paper S held on the outer periphery of the impression cylinder 15 moves to a position facing the first blanket cylinder 13, the action of the cylinder insertion mechanism shown in FIG. The first blanket cylinder 13 is brought into a cylinder-inserted state in contact with the impression cylinder 15. In this state, as shown in FIG. 35, the leading end portion of the printing paper S comes into contact with the end portion of the region on the first blanket cylinder 13 used for printing black ink. Then, the black ink is transferred from the image area 67a of the printing plate P held on the first plate cylinder 11 to the area used for printing the black ink on the surface of the first blanket cylinder 13. Yes. For this reason, the black ink is transferred to the printing paper S by further rotating the first blanket cylinder 13 and the impression cylinder 15.
[0163]
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 action of the cylinder insertion mechanism shown in FIG. The blanket cylinder 14 is brought into a cylinder-inserted state in contact with the impression cylinder 15. In this state, as shown in FIG. 36, the leading end portion of the printing paper S comes into contact with the end portion of the region used for printing cyan ink on the surface of the second blanket cylinder 14. Then, cyan ink is transferred from the image area 67c of the printing plate P held by the second plate cylinder 12 to the area on the surface used for printing cyan ink on the surface of the second blanket cylinder 14. Yes. For this reason, when the second blanket cylinder 14 and the impression cylinder 15 are further rotated, the cyan ink is further transferred to the printing paper S on which the black ink has already been transferred.
[0164]
In this state, when the impression cylinder 15 continues to rotate together with the first and second blanket cylinders 13 and 14, the printing paper S is completely wound around the outer periphery of the impression cylinder 15 as shown in FIG. It becomes. 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 on the surface of the first blanket cylinder 13 that is used for printing magenta ink. The magenta ink is transferred from the image area 67b of the printing plate P held on the first plate cylinder 11 to the area on the surface of the first blanket cylinder 13 used for printing magenta ink. Yes. For this reason, when the first blanket cylinder 13 and the impression cylinder 15 are further rotated, the magenta ink is further transferred to the printing paper S on which the black and cyan inks have already been transferred.
[0165]
When the impression cylinder 15 further rotates, the printing paper S comes into contact with the end of the area on the second blanket cylinder 14 used for printing yellow ink. Then, the yellow ink is transferred from the image area 67d of the printing plate P held on the second plate cylinder 12 to the area on the surface of the second blanket cylinder 14 used for printing yellow ink. Yes. Therefore, when the second blanket cylinder 14 and the impression cylinder 15 are further rotated, the yellow ink is further transferred to the printing paper S on which the black, cyan, and magenta inks have already been transferred. Is completed.
[0166]
As shown in FIG. 38, the leading end portion of the printing paper S for which printing of four colors has been completed is transferred from the impression cylinder 15 to the paper discharge cylinder 17. 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.
[0167]
Then, as shown in FIG. 39, the printing paper S for which the four colors have been printed is transported to the paper discharge unit 28 together with the grippers of the paper discharge cylinder 17 by the drive of the pair of chains 19, and is discharged.
[0168]
As described above, in this printing apparatus, the impression cylinder 15 has a diameter that is ½ of the diameter of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14. Therefore, the impression cylinder 15 rotates twice while the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14 rotate once. Then, while the impression cylinder 15 rotates twice, the four colors of yellow, magenta, cyan, and black are printed on the printing paper S held on the outer periphery of the impression cylinder 15. For this reason, every time the impression cylinder 15 makes two revolutions, the new printing paper S is supplied from the paper feeding cylinder 16 so that the four colors can be continuously printed.
[0169]
In this printing apparatus, it is also possible to perform single-color printing or the like instead of performing the four-color printing as described above.
[0170]
For example, when printing with only black ink in this printing press, the same image is formed in the image areas 67 a and 67 b in the printing plate P held by the first plate cylinder 11. As described above, the ink supply device 20a can supply black ink to both the image areas 67a and 67b. Further, as described above, the other ink supply devices 20b, 20c, and 20d do not come into contact with the printing plates P mounted on the first and second plate cylinders 11 and 12, respectively. In this state, a new printing paper S is supplied from the paper feed cylinder 16 every time the impression cylinder 15 makes one rotation. As a result, every time the impression cylinder 15 makes one rotation, an image of black ink from the image area 67a or 67b on which 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.
[0171]
In this case, the second plate cylinder 12 and the second blanket cylinder 14 are not used. Therefore, the second blanket cylinder 14 may be in a cylinder-extracted state by a cylinder insertion mechanism shown in FIG. Further, while printing is being 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 this position. The plate making process may be executed above.
[0172]
【The invention's effect】
Claim1In the ink supply position, the ink roller has a cam follower that abuts a cam that rotates in synchronization with the plate cylinder and the ink roller abuts the surface of the printing plate. Ink roller support arm swinging mechanism that swings between the ink supply device and the retreat position separated from the surface of the printing plate, and the ink roller support arm when the ink supply device is moved from the separation position to the opposite position by the ink supply device moving mechanism And a stop mechanism for releasing the stop operation of the ink roller support arm when the cam is moved to an angular position opposite to the cam follower by the rotation of the plate cylinder. The ink roller of the ink supply device is prevented from coming into direct contact with the printing plate when moving from the separation position to the facing position, and printing is performed on the ink roller It can be the contact in place. For this reason, it is possible to prevent uneven supply of ink to the printing plate and perform uniform printing.
[0173]
Claim2In the printing apparatus that performs printing by supplying ink to the printing plate after recording an image on the printing plate, by moving the plate cylinder between the image recording position and the printing position, The image recording device used in the image recording process and the ink supply device used in the printing process can be arranged at different positions so as not to interfere with each other. And a moving mechanism that moves the ink roller between an ink supply position where the ink roller contacts the surface of the printing plate and a retracted position that is separated from the surface of the printing plate, and an ink supply device using the ink supply device moving mechanism. When the ink supply device is moved from the separation position to the facing position, it has a stop mechanism that stops the ink roller at the retracted position. Direct contact with the plate can be prevented, uneven ink supply to the printing plate can be prevented, and uniform printing can be performed.Further, the ink supply device moving mechanism can move the ink supply device from a position on the plate cylinder moving path by the plate cylinder moving mechanism to a position outside the plate cylinder moving path. Collisions can be prevented.
[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, 32;
3 is a side sectional view showing the vicinity of a bearing portion 33 in the first plate cylinder moving mechanism 31. FIG.
FIG. 4 is a schematic view showing a relationship between a rotation preventing member 47 disposed in the first plate cylinder 11 and a release member 48 disposed in a first printing position.
FIG. 5 is a schematic view showing a relationship between a rotation preventing member 47 disposed in the first plate cylinder 11 and a release member 48 disposed in a first printing position.
FIG. 6 is a schematic diagram showing a relationship between a rotation preventing member 47 disposed in the first plate cylinder 11 and a release member 48 disposed in a first printing position.
7 is a schematic view showing a rotation preventing member 47 disposed on the first plate cylinder 11 and a release member 49 disposed at an image recording position. FIG.
FIG. 8 is a front view of the vicinity of the plate cylinder rotating mechanism 30;
9 is a side sectional view showing the main part of FIG.
FIG. 10 is an explanatory diagram showing an arrangement of an image area 67 on the printing plate P.
FIG. 11 is a schematic view of the ink supply device 20a and the fountain solution supply device 21a as viewed from the front side.
FIG. 12 is a schematic view of the ink supply device 20a and the fountain solution supply device 21a as viewed from the back side.
13 is a schematic view showing a swim roller moving mechanism 256. FIG.
FIG. 14 is a schematic view showing a swim roller moving mechanism 256;
FIG. 15 is a schematic diagram showing a swim 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 side.
FIG. 19 is an explanatory diagram showing the swinging motion of the arms 302, 308, and 312 by the arm swinging mechanism.
FIG. 20 is an explanatory view showing the swinging operation of the arms 302, 308, 312 by the arm swinging mechanism.
FIG. 21 is a plan view of an essential part of the arm swing mechanism.
FIG. 22 is a plan view of an essential part of the arm swing mechanism.
FIG. 23 is an explanatory diagram showing the operation of the lever 351, the stopper 348, and the like.
FIG. 24 is an explanatory diagram showing operations of the lever 351, the stopper 348, and the like.
FIG. 25 is an explanatory diagram showing operations of the lever 351, the stopper 348, and the like.
FIG. 26 is an explanatory diagram showing a moving operation of the ink supply device 20c.
FIG. 27 is an explanatory diagram showing a moving operation of the ink supply device 20c.
FIG. 28 is an explanatory diagram showing a moving operation of the ink supply device 20c.
FIG. 29 is an explanatory diagram showing a moving operation of the ink supply device 20c.
FIG. 30 is a schematic view showing a trunking mechanism of the first blanket cylinder 13;
FIG. 31 is a block diagram illustrating a main electrical configuration of the printing apparatus.
FIG. 32 is a flowchart showing an outline of plate making and printing operations by the printing apparatus.
FIG. 33 is a flowchart showing a plate making process.
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.
FIG. 36 is an explanatory diagram illustrating a printing operation of the printing apparatus.
FIG. 37 is an explanatory diagram illustrating a printing operation of the printing apparatus.
FIG. 38 is an explanatory diagram illustrating a printing operation of the printing apparatus.
FIG. 39 is an explanatory diagram illustrating a printing operation of the printing apparatus.
[Explanation of symbols]
11 First plate cylinder
12 Second plate cylinder
13 First blanket cylinder
14 Second blanket cylinder
15 impression cylinder
16 Feed cylinder
17 Discharge cylinder
20 Ink supply device
21 Dampening water supply device
23 Plate Supply Department
24 Discarding part
25 Image recording device
26 Development processing equipment
27 Feeder
28 Paper discharge unit
30 Plate cylinder rotation mechanism
31 First plate cylinder moving mechanism
32 Second plate cylinder moving mechanism
71 Ink roller
241 cam
242 Water Boat
243 Mizumoto Roller
244 Swim Roller
245 Intermediate roller
290 Ink base roller
291 Inking roller
292 Inking roller
293 Inking roller
294 Ink kneading roller
295 Ink kneading roller
296 Ink kneading roller
297 Ink call roller
298 Ink transfer roller
299 Ink transfer roller
302 arms
304 Release cam
305 Release cam
306 Contact member
308 Arm
311 per member
312 arm
314 per member
316 Air cylinder
337 axes
338 axes
341 Cam Followers
343 Cam Followers
346 Air cylinder
348 Stopper
351 lever
352 solenoid
P printing plate
S printing paper

Claims (2)

In a printing apparatus comprising an ink supply unit having an ink storage part for storing ink, and an ink roller for supplying ink to the printing plate by contacting the surface of the printing plate mounted on the plate cylinder,
An ink supply device moving mechanism for moving the entire ink supply device between an opposing position facing the plate cylinder and a separation position spaced from the plate cylinder;
A cam disposed on a side surface of the plate cylinder and rotating in synchronization with the plate cylinder;
An ink roller support arm that pivotally supports the ink roller;
The ink roller has a cam follower that abuts the cam at a predetermined angular position as the plate cylinder rotates, and the ink roller supporting arm is disposed in the state where the ink supply device is disposed at the facing position. An ink roller support arm swinging mechanism that swings between an ink supply position that contacts the surface of the printing plate and a retracted position that is separated from the surface of the printing plate;
When the ink supply device is moved from the separated position to the facing position by the ink supply device moving mechanism, the ink roller support arm is stopped at the retracted position, and the cam is rotated with the cam follower by the rotation of the plate cylinder. A stop mechanism that releases the stop operation of the ink roller support arm when moved to an opposing angular position;
A printing apparatus comprising: A printing apparatus for printing by recording an image on a printing plate and then supplying ink to the printing plate for printing,
A plate cylinder holding the printing plate on its outer periphery,
An image recording apparatus for recording an image on a printing plate held by the plate cylinder;
A plate cylinder moving mechanism for moving the plate cylinder between an image recording position facing the image recording apparatus and a printing position where printing is performed by a printing plate held on the plate cylinder;
An ink supply device having an ink storage part for storing ink, and an ink roller for supplying ink to the printing plate by contacting the surface of the printing plate mounted on the plate cylinder;
Opposed position facing the plate cylinder on the movement path of the plate cylinder across the ink supply device according to the plate cylinder moving mechanism, according to the outside movement path of the plate cylinder the plate the plate cylinder moving mechanism spaced from the body An ink supply device moving mechanism for moving between the separated positions;
In a state where the ink supply device is disposed at the facing position, the ink roller is disposed 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. A moving mechanism to move with,
A stop mechanism for stopping the ink roller at the retracted position when the ink supply device is moved from the separation position to the facing position by the ink supply device moving mechanism;
A printing apparatus comprising:

Images