JPH09123410A - Ink feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed a plurality of colors of ink to a form plate without increasing the size thereof by providing a member for supporting ink delivery parts corresponding in number to ink feeding parts collectively, a moving mechanism for reciprocating the supporting member along a roller at the ink feeding part, etc. SOLUTION: When a form plate is fed onto a plate bed 1 from a form plate feeder 8, an operator draws out a mounting table 32 from waiting position and tilts the mounting table 32 to a position for mounting the form plate. After a plurality of form plates are mounted on the mounting table 32 while positioning by means of a positioning pin 31, the mounting table 32 is reset to the waiting position. At that time, the plate bed 1 is shifted to the position B for discharging the form plate. Under that state, the mounting table 32 is driven upward from the waiting position by means of an air cylinder 36 to pass between a pair of linear guides and arrives at a position for feeding a form plate located above the horizontal moving path of form bed 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for supplying ink to a printing plate in a printing device, and more particularly to an ink supply device suitable for a printing device for printing a small number of copies.

[0002]

2. Description of the Related Art In a rotary printing machine or the like for printing a large amount of printed matter, an ink supply device having an ink fountain is used. However, in an ink supply device having an ink fountain, a large amount of printing is performed. Since the ink supply amount is not stabilized until after performing the printing, such an ink supply device is used in a printing device that prints about one to several sheets, such as a printing device for performing plate inspection printing. When adopting, it becomes necessary to print an extremely large amount of prints as compared with the required number of prints.

For this reason, in a printing apparatus for printing a small number of copies, as described in, for example, Japanese Patent Laid-Open No. 63-321146, the ink supply section runs from the ink ejection section running in the axial direction of the ink supply roller. An ink supply device that supplies ink to the ink supply roller by directly ejecting ink to the ink is used. Such an ink supply device can supply only the required amount of ink to any position in the axial direction of the ink supply roller according to, for example, the pattern area of the printing plate. It is suitable.

[0004]

However, in order to print with, for example, four color inks, it is necessary to dispose the above-mentioned ink supply devices for four colors, so the space occupied by the four ink supply devices is large. Is required, and the entire printing apparatus becomes large. Further, there is a problem that the structure is complicated because four sets of mechanisms for moving the ink discharge portion in the axial direction of the ink supply roller are required.

In Japanese Patent Publication No. Sho 49-35722, four sets of ink kneading rollers are arranged radially around a rotary shaft provided on a base, and rotation is provided on a base moving on the base. Four sets of ink supply rollers are also arranged radially around the shaft, and the gantry is moved to bring the ink mixing roller and the ink supply roller into contact with each other, so that the operator applies the ink mixing roller on the base in advance. An ink supply device that supplies ink from an ink kneading roller to an ink supply roller has been proposed. However, in this ink supply device as well, since it is necessary to dispose four sets of ink kneading rollers in addition to the four sets of ink supply rollers, the size of the printing apparatus is the same as that of the ink supply device described above. There is also a problem in that work efficiency is poor because the operator needs to apply ink to the ink kneading roller in a state where the gantry is moved from above the ink kneading roller to another position.

The present invention has been made to solve the above-mentioned problems, and does not increase the size and complexity of the printing apparatus,
An object of the present invention is to provide an ink supply device capable of supplying a plurality of colors of ink to a printing plate.

[0007]

The invention according to claim 1 comprises a plurality of rollers arranged in parallel to each other, and a plurality of ink supply units for supplying inks of different colors to a printing plate. , The plurality of ink supply units,
Supporting means for supporting at a plurality of positions spaced apart from each other on a circumference centered on a rotation axis parallel to the plurality of rollers, and by rotating the support means about the rotation axis, the plurality of Drive means for sequentially moving the ink supply part of the ink cartridge to the plurality of positions on the circumference, and at one position of the plurality of positions, the ink supply part with respect to the ink supply part moved to this position. A number of ink ejection units corresponding to the ink supply unit for ejecting ink of a corresponding color, a support member that collectively supports a number of ink ejection units corresponding to the ink supply unit, and the support member And a moving mechanism that reciprocates along the roller of the ink supply unit.

According to a second aspect of the present invention, in the first aspect of the present invention, one of the plurality of positions is an ink supply position for supplying ink to a printing plate from an ink supply unit, and the plurality of positions are provided. One of the positions other than the ink supply position is the ink discharge position for discharging ink from the ink discharge unit to the ink supply unit.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a right side view of a printing device to which an ink supply device according to the present invention is applied, and FIG. 2 is a left side view thereof. It should be noted that, in these drawings, for convenience of description, a state in which a part of the side plate and the like is removed is illustrated.

This printing apparatus has a printing plate 1 on which a printing plate is mounted and which reciprocates in the left-right direction in FIG. 1, a paper cylinder 2 capable of mounting two printing papers on the outer periphery thereof, and a blanket on the outer periphery thereof. A blanket cylinder 3 for mounting the ink, an ink supply device 4 according to the present invention for supplying ink to the printing plate on the platen 1, and a dampening water for supplying the printing plate on the platen 1. Dampening water supply device 5, a blanket cleaning device 6 for cleaning the blanket mounted on the blanket cylinder 3, an ink cleaning device 7 for cleaning the ink supply roller of the ink supply device 4, and a platen plate. 1, a printing plate supply device 8 for supplying a printing plate and a printing plate discharge device 9 for discharging the printing plate from the platen 1.

First, the structures of the platen 1 and its moving mechanism will be described. FIG. 3 is a plan view showing the outline of the platen plate 1 and its moving mechanism.

The plate surface plate 1 is horizontally reciprocated between a printing plate supply position A indicated by a chain double-dashed line in FIGS. 1 and 3 and a printing plate discharge position B indicated by a solid line in FIG. By doing so, a printing plate feeding / discharging operation and a printing operation to be described later are performed.

At one end of the platen 1, as shown in FIG.
A plurality of positioning pins 11 for positioning the printing plate placed thereon and a plurality of plate grippers 12 for fixing the positioned printing plate are respectively provided. The positioning pin 11 is configured to be capable of moving up and down by driving an air cylinder (not shown) at the printing plate supply position A. The plate gripper 12 engages with the air cylinder 13 to open / close at the printing plate supply position A, and engages with the air cylinder 14 to open / close at the printing plate discharge position B. Is configured. Further, on the side of the platen 1, a rack 16 that meshes with a gear 15 arranged at the end of the blanket cylinder 3 described later is arranged.

The plate surface 1 is slidably supported at its lower ends by a pair of linear guides 17. In addition, a ball screw 1 connected to a pulley 18 rotated by a motor (not shown) is provided on one side of the linear guide 17.
9 is arranged, and the platen 1 is connected to the ball screw 19 via a nut 20. Therefore, the platen 1 moves horizontally with the rotation of the ball screw 19 from the printing plate supply position A shown by the chain double-dashed line in FIGS. 1 and 3 to the printing plate discharge position B shown by the solid line in FIG. It reciprocates horizontally along the route.

Next, the structure of the printing plate supply device 8 will be described.

The printing plate supply device 8 is for supplying a printing plate onto the platen 1, and has a mounting table 32 on one end of which a positioning pin 31 is erected. This mounting table 32 is pulled out from the standby position shown by the chain double-dashed line in FIG. 1 to the left side position of the apparatus main body by the guide of the guide member 33, and by rotating around the shaft 34 at this position, In FIG. 1, it is configured to be movable to the printing plate mounting position shown by the solid line. Further, the mounting table 32 is connected to an engaging piece 35 disposed below the mounting table 32, and when the mounting table 32 moves to a standby position shown by a chain double-dashed line in FIG. By engaging 35 with the rod portion of the air cylinder 36, the air cylinder 36 is driven to move up and down.

Further, the mounting table 32 in the standby position
1, a plurality of first and second suction plates 37 and 38 are arranged in a line in the direction perpendicular to the paper surface of FIG. 1, respectively. The first suction plate 37 is for holding the front end of the printing plate by suction, and is moved up and down by driving an air cylinder 39. The second suction plate 38 holds the rear end of the printing plate by suction. The second suction plate 38 moves up and down by driving the air cylinder 40 and is guided by the rail 41 to move in the left-right direction in FIG. The second suction plate 38 is shown in FIG.
The reason why it is configured to be movable in the left-right direction is to accommodate various printing plate sizes.

When the printing plate is supplied from the printing plate supply device 8 onto the platen 1, the operator pulls out the mounting table 32 from the standby position and tilts and rotates it to the mounting position of the printing plate. Then, after the plurality of printing plates are positioned and mounted on the mounting table 32 by the positioning pins 31, the mounting table 32 is returned to the standby position. At this time, the platen 1 is moved to the printing plate discharge position B.

In this state, the mounting table 32 is driven to rise by the air cylinder 36, so that the mounting table 32 moves from the standby position located below the horizontal movement path of the platen 1 to the pair of linear guides 17. After passing through the space, the platen 1 is raised to the printing plate supply position located above the horizontal movement path. Then, after both ends of the printing plate on the mounting table 32 are suction-held by the first and second suction plates 37 and 38, the mounting table 32 is lowered to the standby position. Then, after moving the platen 1 to the printing plate supply position A, the first and second suction plates 37, 38 are lowered, and the printing plate held there is placed on the platen 1. To do.

Next, the structure of the blanket cylinder 3 will be described.

The blanket cylinder 3 has a cylindrical outer peripheral surface on which a blanket made of a soft material such as rubber is mounted. One end of the blanket cylinder 3 of the plate surface plate 1 is, as shown in FIG. A gear 15 that meshes with the rack 16 is provided. Further, as shown in FIG. 2, the blanket cylinder 3 is connected to the eccentric mechanism 50.

This eccentric mechanism 50, as shown in FIG.
A worm wheel 51 having a central axis at a position eccentric from the axis of the blanket cylinder 3 and a worm shaft 53 rotated by a motor 52 are provided. The blanket cylinder 3 is rotatably supported by the worm wheel 51. Therefore, the blanket cylinder 3 is configured to be movable between the first position F shown by the alternate long and short dash line in FIG. 1 and the second position G shown by the solid line by the rotation of the worm wheel 51.

The first position F is a position where the blanket mounted on the outer peripheral surface of the blanket cylinder 3 comes into contact with the printing plate mounted on the surface of the platen 1 to transfer the ink image. In the first position F, the gear 15 arranged at one end of the blanket cylinder 3 meshes with the rack 16 of the platen plate 1 that has moved below the blanket cylinder 3. Then, with the horizontal movement of the platen 1, the blanket cylinder 3 is driven via the rack 16 and the gear 15 and rotates in synchronization with the moving speed of the platen 1. Further, the second position G is a position where the blanket mounted on the outer peripheral surface of the blanket cylinder 3 comes into contact with the printing paper mounted on the surface of the paper cylinder 2 to perform printing. In the second position G, the gear 15 arranged at one end of the blanket cylinder 3 meshes with the gear 24 arranged at one end of the paper cylinder 2. Then, as the paper cylinder 2 rotates, the blanket cylinder 3 is driven via the gears 24 and 15 and rotates in synchronization with the paper cylinder 2.

Even when the blanket cylinder 3 is in the first position F, when the platen 1 is in the printing plate supply position A or the printing plate discharge position B, for example,
Since the gear 15 of the blanket cylinder 3 is not meshed with the rack 16 of the platen 1, the blanket cylinder 3 rotates freely, and when the gear 15 and the rack 16 are engaged again, their relative positions. The relationship is uncertain. Further, even when the blanket cylinder 3 moves from the first position F to the second position G, it is necessary to make the relative positional relationship between the blanket cylinder 3 and the paper cylinder 2 constant. Therefore, the blanket cylinder 3 has a rotation mechanism for independently rotating the blanket cylinder 3 at the first position F and a positioning mechanism for fixing the rotation angle position of the blanket cylinder 3 after rotation at a fixed position. Is attached.

As shown in FIG. 2, this rotating mechanism is composed of a gear 54 that meshes with the gear 15 of the blanket cylinder 3 and a motor 55 that rotationally drives the gear 54. Further, as shown in FIG. 1, the positioning mechanism is arranged in a device main body having a pair of hitting members 56 arranged on the end face of the blanket cylinder 3 and an abutting portion abutting against the hitting member 56 at the rod tip thereof. It is composed of a pair of air cylinders 57 provided. When the blanket cylinder 3 is rotated and positioned, the blanket cylinder 3 is rotationally driven by the gear 54 in a state where the rod of the air cylinder 57 is contracted to perform a rough alignment. Then, the rod of the air cylinder 57 is extended and the abutting portion at the tip thereof is pressed against the pair of hitting members 56, whereby the rotational angle position of the blanket cylinder 3 is positioned at a fixed position.

The rotating mechanism composed of the gear 54 and the motor 55 described above is also used when the blanket cylinder 3 is rotationally driven in the blanket cleaning process to be described later and when the blanket cylinder 3 is maintained.

Next, the structure of the paper cylinder 2 will be described.

The paper cylinder 2 is one in which two printing papers are mounted on the outer peripheral surface of a cylindrical main body having a diameter twice that of the blanket cylinder 3, and one end thereof has one end thereof, as described above.
A gear 24 that meshes with the gear 15 of the blanket cylinder 3 is provided. As shown in FIG. 2, the gear 24 also meshes with a gear 59 connected to the motor 58. Therefore, when the blanket cylinder 3 is in the second position, when the paper cylinder 2 is rotated by the drive of the motor 58, the blanket cylinder 3 is driven via the gears 24 and 15, and the paper cylinder 2 is rotated.
It rotates in synchronization with. At this time, since the paper cylinder 2 has a diameter twice that of the blanket cylinder 3, the blanket cylinder 3 rotates twice while the paper cylinder 2 rotates once.

On the outer periphery of the paper cylinder 2, two sets of paper grippers 60 for fixing the leading end of the printing paper to be mounted thereon are arranged at positions symmetrical with respect to the axis of the paper cylinder 2. Further, an air cylinder 61 for opening and closing the paper grip 60 is arranged in the main body of the apparatus. The paper gripper 60 moves to a position facing the air cylinder 61 with the rotation of the paper cylinder 2, and receives the drive of the air cylinder 61 at this position to perform the opening / closing operation. Further, a suction hole (not shown) for sucking and holding the rear end of the printing paper is formed on the outer periphery of the paper cylinder 2, and the suction hole is connected to a vacuum pump (not shown).

When mounting the printing paper on the outer peripheral surface of the paper cylinder 2, the printing paper is supplied along the main body cover 62 with one paper grip 60 opened by the air cylinder 61. Then, by driving the air cylinder 61, one of the paper grippers 60 is closed to hold the leading edge of the printing paper. In this state, while rotating the paper cylinder 2 in the clockwise direction in FIG. 1 and sucking air through the suction holes, the rear end of the printing paper is held on the surface of the paper cylinder 2, and the entire printing paper is held on the outer peripheral surface of the paper cylinder 2. Fixed to. Next, by rotating the paper cylinder 2 to a position where the other paper gripper 60 faces the air cylinder 61 and performing the same operation as described above, the second printing paper is moved to the paper cylinder 2
Fixed to the outer peripheral surface of.

Next, the structure of the ink supply device 4 according to the present invention will be described.

The ink supply device 4 comprises a pair of left and right rotary plates 64 which rotate about a shaft 63, and five ink supply rollers which are supported between the rotary plates 64 and are arranged in parallel with each other. 4 ink supply parts 65a, 65
b, 65c, 65d, and ink supply units 65a, 65
b, 65c, and 65d, the ink ejection mechanism 66 for ejecting ink to the ink supply roller, and the ink supply roller in the ink supply section located at the lower end of each ink supply section 65a, 65b, 65c, 65d. And an elevating mechanism 67 for elevating.

The pair of rotating plates 64, as shown in FIG.
It is supported by a shaft 63 arranged in the horizontal direction. A sprocket 68 is attached to the left side surface of the left rotary plate 64, and the sprocket 68 is connected to a sprocket 70 provided on a drive motor 69 for the rotary plate 64 via a chain 71. Therefore, the rotary plate 64 is
Driven by 9 causes rotation about the shaft 63. Further, as shown in FIG. 1, the shaft 6 is provided on the right side surface of the right rotating plate 64.
Four pins 72 are erected on the circumference centered on 3 at angular positions separated from each other by 90 degrees.

An air cylinder 73 having a positioning block 74 at its rod tip is provided on the right side surface of the apparatus main body.
Is fixed. These pins 72 and the positioning block 74 are for accurately positioning the rotation angle position of the rotary plate 64 and for fixing the rotary plate 64 after positioning. That is, after the rotation plate 64 rotates, the positioning block 74 is pressed against the pin 72 by the driving of the air cylinder 73, so that the rotation plate 64 is accurately positioned and fixed at that position.

Four ink supply parts 65a, 65b, 65
c and 65d are for supplying four colors of ink of black, cyan, magenta, and yellow to the printing plate, respectively, and are 9 on the circumference with the axis 63 as the center.
They are arranged at angular positions separated by 0 degrees. Therefore, as shown in FIG. 1, the respective ink supply units 65a, 65b, 65c, 65d are rotated by 90 degrees of the rotary plate 64 as one unit, and the lower ends of the circumferences around the shaft 63, as shown in FIG. It is selectively arranged at four positions of the upper end, the right end, and the left end. Of these four positions, the position of the lower end is the ink supply unit 65.
Reference numerals a, 65b, 65c and 65d are ink supply positions for supplying ink to the printing plate on the platen 1, and the rightmost position shown in FIG.
Ink ejection positions b, 65c, and 65d are supplied with ink from the ink ejection mechanism 66.

FIG. 4 shows four ink supply parts 65a and 65a.
Ink supply unit 65a of one of b, 65c and 65d
FIG. 6 is a right side view showing a state in which is disposed at the ink supply position. As shown in this figure, the ink supply unit 65a is connected to a roller 74, which is rotatably driven by a drive mechanism described later, and a roller 74 which is connected to the roller 74 via a pair of arms 75.
Ink of two rollers 76 and 77 that rotate with the rotation of the rollers and two rollers 78 and 79 that are mounted on the rollers 76 and 77 and that rotate with the rotation of the rollers 76 and 77. A supply roller is provided. The other ink supply units 65b, 65c, 65d have the same configuration.

At the ink supply position, the ink supply section 65a faces the elevating mechanism 67 provided in the main body of the apparatus. The elevating mechanism 67 includes a pair of cams 82 that are connected to a pair of air cylinders 80 via a link mechanism and rotate about a shaft 81. Rollers 76, 77, 78, 79
Is lifted by the cam 82 rotated by the air cylinder 80 pushing up the lower end of the arm 75.

FIG. 5 is a front view showing an outline of the ink discharge mechanism 66. As shown in FIG. 1, the ink discharge mechanism 66 includes the ink supply units 65 that have moved to the ink discharge positions.
The ink supply rollers a, 65b, 65c, and 65d are arranged at positions where ink can be ejected.

The ink discharge mechanism 66 has ink tanks 83a, 83b, 83c and 83d which store inks of four colors of black, cyan, magenta and yellow, respectively.
And these ink tanks 83a, 83b, 83c, 8
Ink supply section 6 of the corresponding color for the ink stored in 3d
5a, 65b, 65c, 65d, ink pumps 84a, 84b for discharging to the ink supply roller 77,
Four ink ejecting portions 85a including 84c and 84d,
85b, 85c, 85d are provided. These ink ejecting portions 85a, 85b, 85c, 85d are connected to the ink supplying portion 6.
5a, 65b, 65c, and 65d are fixedly mounted on a single support member 86 that is slidable on a rail 90 that is arranged in parallel with the ink supply rollers 74, 76, 77, 78, and 79. The support member 86 is connected to a synchronous belt 89, which is wound between a drive pulley 87 that is driven by a motor (not shown) and a driven pulley 88, through a connecting tool. For this reason, the four ink ejecting portions 85a, 85b, 85c, 85d are connected to the drive pulley 87.
Drive the ink supply units 65a, 65b, 65c,
It reciprocates integrally along the ink supply roller 77 at 65d.

FIG. 6 shows four ink ejection portions 85a, 85.
One of b, 85c, and 85d, the ink ejection portion 85a
FIG. As described above, the ink ejecting unit 85a includes the ink tank 83a containing the black ink and the ink pump 84a for ejecting the ink to the ink supply roller 77 of the ink supply unit 83a. The ink tank 83a is provided with an inlet 91 for compressed air for applying pressure to the ink contained therein. Further, the ink pump 84a has a nozzle 92 for ejecting ink and an ink supply hole 93 for supplying ink in the ink tank 83a.
It has a piston 94 that sends it out to the nozzle 92 via a valve and a stop valve 95 for the supply hole 93. The ink in the ink tank 83a that has entered the supply hole by the action of the compressed air pushes the stop valve 95 away by the action of the piston 94 and reaches the nozzle 92, and the ink supply roller 7 of the ink supply unit 83a.
7 is discharged. In addition, the other ink ejecting portions 85b, 85
The c and 85d also have the same configuration.

As shown in FIG. 2, on the left side surface of the main body of the apparatus, ink supply portions 65a, 65b, 65c, 65 are provided at two positions, an ink supply position and an ink discharge position.
Ink supply rollers 74, 76, 77, 7 in FIG.
Two sets of drive mechanisms for rotating and driving 8, 79 are provided. Of these drive mechanisms, the ink supply rollers 74, 76, 77, 78, 7 in the ink supply units 65a, 65b, 65c, 65d at the ink ejection position.
The drive mechanism for rotating 9 has a sprocket 102 connected to a motor 100 via a chain 101.
The rotation shaft of the sprocket 102 is moved to the ink ejection position, and the ink supply portions 65a, 65b, 65 are moved.
The shafts of the ink supply rollers 74 for driving in c and 65d can be connected by a clutch mechanism (not shown). Therefore, each ink supply unit 65a, 65b, 6
In a state in which 5c and 65d are moved to the ink discharge positions, the ink supply rollers 74, 76, 77, 78 and 79 are provided.
Is driven by the motor 100 to rotate. In addition, at the ink supply position, the ink supply parts 65a, 65b, 65
Ink supply rollers 74, 76, 7 in c, 65d
The drive mechanism for rotating 7, 78, 79 is the motor 10
3 and a sprocket 10 connected via a chain 104
5 The rotation shaft of the sprocket 105 is moved to the ink supply position and the ink supply portions 65a, 65a,
5b, 65c, and 65d, the shaft of the driving ink supply roller 74 can be connected by a clutch mechanism (not shown). Therefore, each ink supply unit 65a,
In the state where 65b, 65c, 65d are moved to the ink supply position, the ink supply rollers 74, 76, 77, 7
The motors 8 and 79 are driven by the motor 103 to rotate.

As shown in FIG. 2, the left side surface of the left rotary plate 64 is provided with a cam 106 having a convex portion and a concave portion formed on the outer periphery thereof in an angular range of about 180 degrees. Two limit switches 107 and 108 are arranged on the left side surface of the apparatus body. These cams 10
6 and limit switches 107, 108 detect the rotational angle position of the pair of rotary plates 64 by the combination of the ON and OFF states of the respective limit switches 107, 108 to supply the ink to the ink supply position or the ink discharge position. It is for detecting which one of the parts 65a, 65b, 65c and 65d is located. For example, if the ink supply unit at the ink supply position is off both the limit switches 107 and 108, the ink supply unit 65a. If the limit switch 107 is on and the limit switch 108 is off, the ink supply unit 65b and the limit switch 107 are off. When the limit switch 108 is ON, the ink supply unit 65d, and when the limit switches 107 and 108 are both ON, the ink supply units 65a and 65c.
The current positions of b, 65c and 65d are detected.

The rotation angle of the rotary plate 64 is detected by a rotary encoder or the like, and the ink supply units 65a, 65b, 65 are provided.
You may make it detect the present position of c and 65d.

When ink is supplied to the printing plate by the ink supply device 4, the rotary plate 64 is rotated and the ink corresponding to the color to be printed first among the ink supply parts 65a, 65b, 65c and 65d. Move the supply part to the ink discharge position. For example, when the color to be printed first is black, the ink supply unit 65a is moved to the ink ejection position. Then, by driving the motor 100, the respective ink supply rollers 74, 76, 7 of the ink supply unit 65a.
Rotate 7,78,79. In this state, the support member 86 of the ink ejection mechanism 66 is reciprocally moved in the axial direction of the ink supply rollers 74, 76, 77, 78, 79, whereby the four ink ejection portions 85a, 85 are ejected.
While reciprocating b, 85c, and 85d integrally, black ink is supplied onto the ink supply roller 77 from one of these ink ejecting portions 85a. At this time, the amount of ink ejected from the ink ejecting portion 85a is determined by the previously measured pattern area of the printing plate or the like.

After the ink is supplied to the ink supply roller 77, each ink supply roller 74, 76, 77, 7 is kept for a certain time.
After continuing the rotation of 8, 79 and kneading the ink, the rotary plate 64 is rotated by 90 degrees to move the ink supply portion 65a to the ink supply position. Along with this, the ink supply unit 65b corresponding to the color to be printed next moves to the ink ejection position and receives the ink of the next color from the ink ejection unit 85b.

The rollers 76, 77, 78, 79 in the ink supply section 65a which has moved to the ink supply position are shown in FIG.
As indicated by the chain double-dashed line in FIG. In this state, the platen 1 moves along the horizontal movement path. When the printing plate placed on the platen 1 moves below the ink supply unit 65a, the air cylinder 80 of the lifting mechanism 67 drives the printing plate.
As shown by the solid line in FIG. 4, the rollers 76, 77, 7
8 and 79 are lowered to bring the ink supply rollers 76 and 77 into contact with the printing plate. At this time, the ink supply rollers 74, 76, 77, 78, 79 of the ink supply unit 65 a are rotated in advance by the drive of the motor 103. In this state, the plate surface plate 1 continues to move horizontally, whereby the ink supply rollers 76 and 77 which rotate in synchronization with the moving speed of the plate surface plate 1.
Rolls on a horizontally moving printing plate, and ink is supplied onto the printing plate.

Next, the structure of the dampening water supply device 5 will be described. FIG. 7 is a schematic view of the right side surface of the dampening water supply device 5.

The dampening water supply device 5 is provided with a dam boat 110 for storing dampening water, a roller 111, a part of which is immersed in the dampening water stored in the dam boat 110, and a dampening water supply amount. Two metering rollers 112 and 113 for adjusting the temperature, and a drive roller 11 that is rotationally driven by a motor 114 shown in FIG.
5 and two supply rollers 116 and 117 that contact the printing plate and supply dampening water to the printing plate. The two supply rollers 116 and 117 are connected to an elevating mechanism (not shown) and can be moved up and down by driving the elevating mechanism. The water boat 110 and the six rollers 111, 112, 113, 115, 116, 117 described above are
The side plates 11 are supported by a pair of side plates 118, and are guided by a guide rail 119 during maintenance.
Along with 8, it can be pulled out from the apparatus main body.

When dampening water is supplied to the printing plate by the dampening water supply device 5, two supply rollers 116 and 11 are used.
6 rollers 111, 112, 1 with 7 raised
The motors 113, 115, 116 and 117 are rotated in advance by the motor 114. When the printing plate placed on the plate surface plate 1 is moved below the dampening water supply device 5 by the horizontal movement of the plate surface plate 1, the two supply rollers 116 and 117 are lowered to move the printing plate Abut. By continuing horizontal movement of the platen 1 in this state, the supply rollers 116 and 117, which rotate in synchronization with the moving speed of the platen 1, roll on the platen which horizontally moves, and is transferred onto the platen. Fountain solution is supplied.

Next, the structure of the blanket cleaning device 6 will be described. FIG. 8 is a schematic view of the right side surface of the blanket cleaning device 6.

The blanket cleaning device 6 is arranged below the blanket cylinder 3, and has a cleaning tank 120 for storing the cleaning liquid and a part of the cleaning tank 120 immersed in the cleaning liquid stored in the cleaning tank 120 and a plurality of gears. A cleaning roller 122 connected to the motor 123 via a cleaning roller 122, a cleaning roller 121 which is driven by the cleaning roller 122 to rotate, and a cleaning means for removing the ink and the cleaning liquid on the cleaning roller 122. A blade 124 configured to be able to come into contact with and separate from the blade, and a collection container 1 for collecting the ink and the cleaning liquid removed by the blade 124.
25, a wiping roll mechanism 126 that wipes the blanket by contacting the surface of the blanket, and a cleaning roller 121.
Cylinder 1 for raising and lowering and 122 integrally
27 and.

The blanket cleaning device 6 is driven by the air cylinder 129 shown in FIG.
At the same time, it goes up and down between the standby position and the blanket cleaning position. This standby position is a position where the blanket cleaning device 6 is arranged below the horizontal movement path of the platen 1, as shown in FIG. Further, the blanket cleaning position of the blanket cleaning device 6 reaches a position above the horizontal movement path of the platen 1 and the cleaning rollers 121 and 122 are arranged close to the blanket cylinder 3 so that the air cylinder 127 is driven. The two cleaning rollers 121, 122
Is a position where the blanket mounted on the outer peripheral surface of the blanket cylinder 3 can contact. The blanket cleaning device 6 is supported by a pair of guide rails 131 and casters 132 at the standby position, and can be pulled out from the main body of the device in a direction perpendicular to the plane of FIG. 1 when performing maintenance.

When cleaning the blanket with the blanket cleaning device 6, the air cylinder 129 is driven to pass the blanket cleaning device 6 from the standby position between the pair of linear guides 17 to the blanket cleaning position. . In this state, as shown in FIG. 8, the cleaning rollers 121 and 122 and the blanket cylinder 3 are
And are slightly separated. Next, the cleaning rollers 121 and 122 are rotated by driving the motor 123. Further, the blanket cylinder 3 is rotated by the rotating mechanism of the blanket cylinder 3 including the gear 54 and the motor 55 described above.

Subsequently, the air cylinder 127 is driven to integrally raise the cleaning rollers 121 and 122. Then, the cleaning rollers 121 and 122 come into contact with the blanket mounted on the outer peripheral surface of the blanket cylinder 3 to supply the cleaning liquid onto the blanket. The tip of the blade 124 contacts the cleaning roller 122 after a predetermined lag time. In this state, by maintaining the rotation of the cleaning rollers 121 and 122 and the blanket cylinder 3, the ink on the surface of the blanket is cleaned by the cleaning liquid, and these ink and cleaning liquid are cleaned by the blade 124 by the cleaning roller 122.
After being removed more, it is recovered in the recovery container 125.

Then, by driving the air cylinder 127,
The cleaning rollers 121 and 122 are lowered, and the roller 128 of the wiping roll mechanism 126 is moved to a position where the roller 128 of the wiping roll mechanism 126 comes into contact with the blanket mounted on the outer peripheral surface of the blanket cylinder 3 by a drive source (not shown), and the wiping cloth spread on the outer periphery Wipe the surface of the blanket with 133. When the blanket is completely wiped off, the air cylinder 129 is driven to lower the blanket cleaning device 6 to the standby position.

Next, the structure of the ink cleaning device 7 will be described. FIG. 9 is a schematic view of the right side surface of the ink cleaning device 7.

The ink cleaning device 7 is disposed below the ink supply device 4, and supplies the cleaning liquid to the drive roller 135, the two cleaning rollers 136 and 137, and the surface of the cleaning roller 137. A nozzle 138, a blade 139 for removing the ink and the cleaning liquid on the cleaning roller 136, an air cylinder 140 for moving the blade 139, and a recovery container 141 for recovering the ink and the cleaning liquid removed by the blade 139. Have.

The drive roller 135 is connected to the sprocket 143 shown in FIG. The sprocket 143 is connected to a motor 103 for rotating the ink supply rollers 74, 76, 77, 78, 79 at the ink supply position via a chain 142. Therefore, the rollers 135, 136 of the ink cleaning device 7,
Reference numeral 137 denotes each ink supply roller 74, 76, 77, 7 which has been moved to the ink supply position by the drive of the motor 103.
It rotates in synchronization with 8, 79.

This ink cleaning device 7 is driven by the air cylinder 129 shown in FIG.
At the same time, it moves up and down between the standby position and the ink cleaning position. This standby position is a position where the ink cleaning device 7 is disposed below the horizontal movement path of the platen 1, as shown in FIG. Further, at the ink cleaning position, the ink cleaning device 7 reaches above the horizontal movement path of the platen 1, and the cleaning roller 1
Ink supply roller 7 with 36 and 137 in raised position
By being placed close to 6 and 77,
The cleaning rollers 136 and 137 are in positions where they can come into contact with the ink supply rollers 76 and 77 that are lowered by the drive of the elevating mechanism 67. Like the blanket cleaning device 6, the ink cleaning device 7 is supported by the pair of guide rails 131 and casters 132 at the standby position and can be pulled out from the main body of the device for maintenance.

When the ink supply rollers 74, 76, 77, 78, 79 are cleaned by the ink cleaning device 7, the air cylinder 129 is driven to move the ink cleaning device 7 from the standby position to the pair of linear guides 17. Pass through the gap and raise to the ink cleaning position. In this state, as shown in FIG. 9, the ink supply rollers 76 and 7
7 is moved to the raised position by the elevating mechanism 67, and the cleaning rollers 136 and 137 and the ink supply rollers 76 and 77 are slightly separated from each other. In this state, the cleaning rollers 136, 137 and the ink supply rollers 74, 76, 77, 78, 79 are synchronously rotated by driving the motor 103. In addition, the cleaning roller 13 from the nozzle 138
A cleaning liquid is supplied to the surface of 7.

Subsequently, the elevating mechanism 67 lowers the ink supply rollers 76 and 77 to wash the cleaning rollers 136 and 137 and the ink supply rollers 76 and 77.
And abut. Further, by driving the air cylinder 140, the tip of the blade 139 is brought into contact with the cleaning roller 136. In this state, by maintaining the rotation of the cleaning rollers 136 and 137 and the ink supply rollers 74, 76, 77, 78 and 79, the ink supply rollers 74 and 7 can be rotated.
The ink on the surface of 6, 77, 78, 79 is washed with a washing liquid, and the ink and the washing liquid are removed from the washing roller 136 by the blade 139, and then the collecting container 14
Collected in 1. Ink supply rollers 74, 76, 77,
When the cleaning of 78 and 79 is completed, the ink cleaning device 7 is lowered to the standby position by driving the air cylinder 129.

Next, the structure of the printing plate discharging device 9 will be described. FIG. 10 is a perspective view showing an outline of the printing plate discharging device 9.

The printing plate discharging device 9 travels while being guided by the pair of guide members 143 and 144 disposed on both sides of the plate surface plate 1 which has moved to the printing plate discharging position B, and the guide members 143 and 144. Possible pair of chains 145, 146
, A pair of sprockets 147, 148 for driving the chains 145, 146, and a pair of chains 145, 1
A plurality of rollers 149 rotatably wound between 46 and a suction plate 150 (see FIG. 1) that suction-holds and raises the leading edge of the printing plate on the platen 1.

The guide members 143, 144 are provided with a first guide portion 152 extending parallel to the surface of the platen 1 at a position slightly higher than the surface of the platen 1 moved to the discharging position B of the printing plate. The first guide portion 1 and the second guide portion 153 which is bent 90 degrees from one end of the first guide portion 152 and extends downward.
It has a third guide portion 154 that is inverted from the other end of 52 along the outer circumference of the sprockets 147 and 148 and extends in parallel with the first guide portion 152.

The pair of sprockets 147 and 148 are connected to each other via a shaft 155.
Are connected to the motor 156 shown in FIG. 2 via a chain 157. Therefore, the pair of sprockets 14
7, 148 rotate in synchronization with the driving of the motor 156. With the rotation of the sprockets 147, 148, the pair of chains 145, 146 has their tips from the ends on the sprocket 147, 148 side of the third guide portion 154 (hereinafter referred to as “proximal ends”) to the other end ( Hereinafter, the vehicle travels in synchronization between positions up to the "tip". The plurality of rollers 149 move from between the second guide portions 153 to the first guide portion 152 as the pair of chains 145 and 146 travel.
To move between positions.

When the printing plate is discharged by the printing plate discharging device 9, the platen plate 1 moves to the printing plate discharging position B with the printing plate on which printing has been completed placed. Next, the plate gripper 12 is lifted by driving the air cylinder 14 provided in the main body of the apparatus to release the fixation of the printing plate P. Further, by driving the air cylinder 151, the suction plate 150 is lowered to a position where it comes into contact with the surface of the printing plate on the platen 1, and the leading edge of the printing plate is sucked and held and then raised. Subsequently, the motor 156 is driven to drive the sprockets 147, 1
By rotating 48, the chains 145, 146 are caused to travel in the direction in which the tip ends thereof are directed from the base end portion to the tip end portion. Along with this, the plurality of rollers 149 move from between the second guide portions 153 to between the first guide portions 152. As a result, the roller 149 is provided on the lower surface of the leading edge of the printing plate and
Between the surfaces of the plate to support the printing plate from below. Next, the suction of the leading edge of the printing plate P by the suction plate 150 is released. In this state, the printing plate is supported by the plurality of rollers 149 on the entire back surface thereof. Then, by driving the motor 156, the sprockets 147 and 148 are rotated, and the chains 145 and 146 are caused to travel in the direction in which the tips of the chains 145 and 146 are directed from the tip to the board. Along with this, the printing plate supported by the plurality of rollers 149 is discharged from above the plate surface plate 1 and carried into the printing plate cleaning device 156 shown in FIG.

Next, the printing operation of the above-mentioned printing apparatus will be described.

FIG. 11 is a flow chart showing the printing operation in this printing apparatus. Note that, in this flowchart, for convenience, each step in the printing operation is displayed in order, but in the actual printing operation, a plurality of steps are executed in parallel.

First, initial setting is performed (step S
1). At the time of this initial setting, data such as the size and color order of the printing plate to be printed is input. In addition, the origin of each part is returned. At this time, the platen 1 has moved to the printing plate discharge position B.

Next, the operator places the printing plate on the placing table 32 in the printing plate supply device 8 (step S2). At this time, the operator positions and places the printing plates for four-color printing in a state of being superimposed on each other in accordance with the printing order according to the previously input data.
Note that the general printing order is the ink supply units 65a, 65
Similar to the arrangement order of b, 65c, and 65d, the order is black, cyan, magenta, and yellow.

Next, the printing paper is supplied (step S
3). The operator supplies the printing paper along the main body cover 62. Then, the paper cylinder 2 is rotated 180 degrees while the front edge of the printing paper is held by the paper gripper 60, and the rear end of the printing plate is sucked and held, thereby mounting the printing paper on the outer peripheral surface of the paper cylinder 2. When performing printing on two sheets of printing paper, this operation is repeated and the two sheets of printing paper are mounted on the outer peripheral surface of the paper cylinder 2.

Next, the printing plate of the color to be printed first is supplied onto the platen 1 (step S4). First, the mounting table 32 is raised to the printing plate supply position. Then, both ends of the printing plate are sucked and held by the first and second suction plates 37 and 38, and then the mounting table 32 is lowered to the standby position. Subsequently, after moving the platen plate 1 to the printing plate supply position A, the first and second suction plates 37 and 38 are lowered,
The printing plate held there is placed on the platen 1.

Next, ink is ejected to the ink supply unit 65a corresponding to the color to be printed first (step S5).
The ink supply unit 65a has been moved to the ink discharge position in advance in step S1. This ink supply unit 65
a ink supply rollers 74, 76, 77, 78, 79
In the rotated state, the ink ejecting portion 85a ejects the ink of the color to be printed first. Then, ink is kneaded by continuing the rotation of each ink supply roller 74, 76, 77, 78, 79. When the ink kneading is completed, the rotary plate 64 is rotated 90 degrees clockwise to move the ink supply portion 65a to the ink supply position.

The above steps S3, S4 and S5 are executed in parallel. That is, the operation of supplying the printing paper to the paper cylinder 2, the operation of supplying the printing plate to the platen 1, and the operation of ejecting the ink to the ink supply unit 65a are performed in parallel, and thereby, until the start of printing. The time required for the preparation operation is shortened. The operation of ejecting ink to the ink supply unit 65a (step S5) may be performed together with the operation of placing the printing plate on the placement table 32 (step S2).

Next, dampening water and ink are supplied to the printing plate on the platen 1 (step S6). First, the platen plate 1 moving to the printing plate supply position A is moved to the printing plate discharge position B.
Move in the direction. Then, when the plate surface plate 1 reaches the position below the dampening water supply device 5, the two supply rollers 11
6 and 117 are lowered and brought into contact with the printing plate on the platen 1. By continuing horizontal movement of the platen 1 in this state, the supply rollers 116 and 117 roll on the horizontally moving printing plate, and dampening water is supplied onto the printing plate. Subsequently, when the plate surface plate 1 reaches the position below the ink supply device 4, the rollers 76, 77, 7 in the ink supply unit 65a are provided.
8 and 79 are lowered by the elevating mechanism 67 to bring the ink supply rollers 76 and 77 into contact with the printing plate. At this time, each ink supply roller 74, 76, 7 of the ink supply unit 65a
The motors 7, 78, 79 are rotated in advance by the drive of the motor 103. In this state, the plate surface plate 1 continues to move horizontally, whereby the ink supply rollers 76 and 77 roll on the printing plate and ink is supplied onto the printing plate. The supply of dampening water and ink to this printing plate is also performed when the plate surface plate moves from the printing plate discharge position B to the printing plate supply position A. The fountain solution and the ink may be supplied in plural times by reciprocating the plate surface plate 1 plural times.

Next, the ink image on the printing plate is transferred to the blanket (step S7). First, the platen plate 1 that has moved to the printing plate discharge position B is moved toward the printing plate supply position A. Then, with the plate surface plate 1 reaching the position below the blanket cylinder 3, the blanket cylinder 3 is moved by the eccentric mechanism 50 to the first position F shown by the chain double-dashed line in FIG. As a result, the gear 15 of the blanket cylinder 3 and the rack 16 of the platen 1 mesh with each other, and the rotation speed of the blanket cylinder 3 and the horizontal movement speed of the platen 1 are synchronized. By continuing horizontal movement of the platen 1 in this state, the ink image of the printing plate on the platen 1 is transferred to the blanket mounted on the outer peripheral surface of the blanket cylinder 3.

Next, the ink image on the blanket is transferred onto the printing paper to perform printing (step S8). First, the blanket cylinder 3 is moved to the second position G shown by the solid line in FIG. 1 by the eccentric mechanism 50. As a result, the gear 15 of the blanket cylinder 3 and the gear 24 of the paper cylinder 2 mesh with each other, and the rotation speeds of the blanket cylinder 3 and the paper cylinder 2 are synchronized. In this state, by rotating the paper cylinder 2 180 degrees,
The ink image on the blanket is transferred to the first printing sheet, and the first color is printed. When printing on the second sheet of printing paper, the blanket cylinder 3 is moved to the first position F, and then steps S6 and S7 are executed again. Then, after returning the blanket cylinder 3 to the second position, the paper cylinder 2 is further rotated by 180 degrees. Here, before the blanket cylinder 1 moves to the second position G, the rotation mechanism including the gear 54 and the motor 55 and the contact member 5 are included.
It is positioned at a predetermined angular position by the positioning mechanism including 6 and the air cylinder 57. For this reason,
Even if the blanket cylinder 3 is rotated by inertial force due to the gear 15 of the blanket cylinder 3 being disengaged from the rack 16 of the platen, the relative positional relationship with the paper cylinder 2 is kept constant. .

Next, the printing plate of the color printed first is discharged from the platen 1 (step S9). First, the platen 1 is moved to the printing plate discharge position B. Then, the plate gripper 12 is lifted to release the fixing of the printing plate, and the suction plate 151 sucks and holds the front end of the printing plate. Then, the printing plate is supported by rollers 149 and conveyed to the cleaning device 156 at the subsequent stage.

The above steps S8 and S9 are executed in parallel. That is, the printing operation of transferring the ink image from the blanket to the printing paper and the discharging operation of the printing plate are executed in parallel, and thereby the time required for supplying the next printing plate is shortened.

Next, it is determined whether or not there is a printing plate to be subsequently printed, that is, whether or not four-color printing is completed (step S10). In the above case, printing is subsequently performed using the second color printing plate, so the determination in step S10 is "Yes" and the operations of steps S4 to S9 are repeated for the second color printing.

At this time, the step S5 for printing the second color is the same as the steps S6, S for printing the first color.
7, S8 and S9 are executed in parallel. That is, since the ink supply units 65a, 65b, 65c, and 65d are arranged in the same color order as the general printing order, when printing in the general printing order, the ink is supplied to the printing plate of the first color. In order to perform the above, the ink supply unit 65a moves to the ink supply position, so that the ink supply unit 65b that supplies the second color ink moves to the ink discharge position. Therefore, at this position, ink is previously supplied from the ink discharge part 85b to the ink supply part 65b to complete the ink kneading. As a result, the time required for the preparation operation until the printing of the second color is started can be shortened.

When the printing of four colors is completed and the judgment in step S10 is "No", the printing paper is ejected (step S11). This printing paper is discharged in step S3.
The operation is the reverse of the operation for supplying the printing paper in.

Then, the blanket is washed (step S12). First, by driving the air cylinder 129, the blanket cleaning device 6 is moved from the standby position located below the horizontal movement path of the platen 1 to the pair of linear guides 17.
Between the blanket wash positions. Then, the cleaning roller 12 of the blanket cleaning device 6
After rotating 1, 122 and the blanket cylinder 3, these are brought into contact with each other to wash the blanket. When the blanket cleaning is completed, the blanket cleaning device 6
Lower to the standby position.

Next, it is determined whether or not four colors are to be printed for another pattern (step S13). If printing is to be performed, the process returns to step S1 to continue the work. At this time, if the initial setting for the next pattern in step S1 is completed in advance, steps S2 to S5 for printing the next pattern are performed in advance during the cleaning of the blanket in step S12. The time required for the preparatory operation for printing the next pattern can be shortened.

When the printing is finished, the ink is generally washed (step S14). First, by driving the air cylinder 129, the ink cleaning device 7 is moved from the standby position located below the horizontal movement path of the platen 1 to a position between the pair of linear guides 17 and raised to the ink cleaning position. Then, each ink supply unit 65a, 65b, 65
Ink supply rollers 76 and 77 of the ink supply unit of one of c and 65d and the cleaning roller 13 of the ink cleaning device 7
6, 137 are brought into contact with each other, and the ink supply roller 74,
Wash 76, 77, 78, 79. Ink supply rollers 74, 76, 77, 78 in the first ink supply unit,
When the cleaning of 79 is completed, the rotary plate 64 is rotated by 90 degrees and the ink supply rollers 74, 7 in the next ink supply section are rotated.
Wash 6, 77, 78, 79. Ink supply rollers 74, 76, 77, 78, 7 in all ink supply units
When the cleaning of 9 is completed, the ink cleaning device 7 is lowered to the standby position.

Incidentally, the above step S13 is step S1.
It is executed in parallel with 2. That is, when printing is finished, the blanket cleaning and the ink cleaning are performed in parallel, and the time required for the preparatory operation until the work is completed is shortened. At this time, the ink cleaning operation may be started when the ink supply operation in step S6 is completed.

When the cleaning of the ink is completed, the apparatus is stopped and the work is completed. The work may be terminated without cleaning the ink.

In the above-described embodiment, the ink supply device 4 is provided with two sets of drive mechanisms, and the ink supply portions 65a, 65b, 65c, 65d are provided only at the two positions of the ink supply position and the ink discharge position. Each of the ink supply rollers 74, 76, 77, 78, 79 in FIG.
A motor is attached to each of 5d, and each ink supply unit 65
The ink supply rollers 74, 76, 77, 78, 79 in a, 65b, 65c, 65d may be individually driven to rotate.

Further, the ink supply device 4 described above is provided with a shaft 6
In the case where four ink supply parts 65a, 65b, 65c, 65d are arranged at four positions which are 90 degrees apart from each other on the circumference of the pair of rotary plates 64 rotating about 3 about the axis 63. As described above, when printing is performed using inks of six colors, for example, it is possible to arrange six ink supply devices at six positions separated by 60 degrees.

[0090]

According to the first aspect of the present invention, a plurality of ink supplying portions for supplying inks of different colors to the printing plate are separated from each other at equal intervals on the circumference around the rotation axis. By sequentially moving to the plurality of positions described above, it is possible to compactly configure the device necessary for supplying the ink of the plurality of colors to the printing plate. In addition, since a single moving mechanism reciprocates a plurality of ink ejecting parts for ejecting ink of colors corresponding to a plurality of ink supplying parts, it is necessary to eject the inks of a plurality of colors to the ink supplying parts. It is possible to easily and compactly configure various configurations. As a result, it is possible to reduce the area occupied by the entire printing device including the ink supply device.

According to the second aspect of the present invention, while ink is being supplied to the printing plate by one ink supply unit at the ink supply position, the ink is discharged from the ink discharge unit to another ink supply unit at the ink discharge position. Ink can be discharged. As a result, the preparation can be completed before the ink is supplied to the printing plate, and the supply operation of the inks of a plurality of colors can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a right side view of a printing device to which an ink supply device according to the present invention is applied.

FIG. 2 is a left side view of a printing device to which the ink supply device according to the present invention is applied.

FIG. 3 is a plan view showing an outline of a plate surface plate 1 and a moving mechanism thereof.

FIG. 4 is a right side view showing an ink supply unit 65a.

FIG. 5 is a front view showing an outline of an ink discharge mechanism 66.

FIG. 6 is a right side view showing an ink ejection portion 85a.

7 is a schematic right side view of the dampening water supply device 5. FIG.

FIG. 8 is a schematic view of the right side surface of the blanket cleaning device 6.

9 is a schematic view of the right side surface of the ink cleaning device 7. FIG.

FIG. 10 is a perspective view showing an outline of a printing plate discharging device 9.

FIG. 11 is a flowchart showing a printing operation of the printing apparatus.

[Explanation of symbols]

 1 plate surface plate 2 paper cylinder 3 blanket cylinder 4 ink supply unit 5 dampening water supply unit 6 blanket cleaning unit 7 ink cleaning unit 8 printing plate supply unit 9 printing plate discharge unit 63 shaft 64 rotating plate 65a ink supply unit 65b ink supply unit Part 65c Ink supply part 65d Ink supply part 66 Ink ejection mechanism 69 Motor 85a Ink ejection part 85b Ink ejection part 85c Ink ejection part 85d Ink ejection part

Claims (2)

[Claims] 1. A plurality of ink supply units each of which is composed of a plurality of rollers arranged in parallel with each other and supplies inks of different colors to a printing plate, and the plurality of ink supply units. Supporting means for supporting at a plurality of positions spaced apart from each other on a circumference centered on a rotation axis parallel to the rotation axis, and the plurality of ink supply parts by rotating the support means about the rotation axis. Driving means for sequentially moving the ink to the plurality of positions on the circumference, and at one position of the plurality of positions, for the ink supply unit that has moved to this position, A number of ink ejection units corresponding to the ink supply unit for ejecting ink, a support member that collectively supports a number of ink ejection units corresponding to the ink supply unit, and the support member An ink supply device characterized by comprising a, a moving mechanism for reciprocating along the roller of the ink supply portion. 2. The ink supply device according to claim 1, wherein one of the plurality of positions is an ink supply position for supplying ink to a printing plate from an ink supply unit, and the one of the plurality of positions is provided. An ink supply device in which one position other than the ink supply position is an ink discharge position for discharging ink from the ink discharge unit to the ink supply unit.