JP2003320637A - Multicolor printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compactly constitute a multi-color printing machine. <P>SOLUTION: The multi-color printing machine comprises one blanket cylinder 15, a vertically movable ink roller group, and a water bar roller group corresponding to each of a plurality of color inks on a running base moving in a reciprocative manner along a trestle. One paper surface plate 11 and a cooling surface plate 68 as one plate surface plate are disposed in a row-state along the moving direction of the base in the trestle. The length of a printing plate 70 mounted on the plate 68 in the base of the moving direction is set a plurality of times of the length (πD) of the circumference of the cylinder 15, and a plurality of color inks of printing elements 71, 72 are formed on the surface of the plate 70. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention, in a single operation,
The present invention relates to a configuration of a printing machine capable of printing images of two colors (a plurality of colors) on a printing paper.

[0002]

2. Description of the Related Art Generally, a single color lithographic printing machine is used to
When performing multicolor printing, for example, an image (company name (trade name), its address, telephone number, characters such as a symbol mark, a symbol, etc.) is displayed on the lower end portion of a calendar (printing paper) ordered by a customer such as a company. If you want to print each customer's mark, the same below) in different colors, prepare two printing machines and
After printing the trade name or trademark with, for example, a black ink on one printing machine, transfer the previous calendar (paper to be printed) to another printing machine prepared with another color (for example, red) ink. , Another mark in red (characters such as symbol mark,
Since the work of printing the (symbol) is executed, two printing machines are required, the equipment cost is high, and more space is required for installing the two printing machines. It took a lot of time and labor to carry out the printing work, and there was a troublesome problem.

Therefore, it is conceivable to print using the multicolor printing press described in Japanese Patent Laid-Open No. 2004-242242.

In this multi-color printing press, a pair of tracks consisting of a pair of pedestals for movably supporting a movable platform (traveling platform) and a rack that meshes with a traveling pinion of the movable platform are installed on the platform. , Between these orbits, parallel to the orbital plane 1
A base printing platen and three platen plates for mounting printing plates for each color of red, green and blue are arranged at regular intervals. Further, three ink supply roller groups are provided between the tracks. On the movable platform that reciprocates on the orbit,
One blacket cylinder and one press cylinder and three inking roller groups for each color are provided. While the glass substrate is placed on the printing platen, the printing plates for each color are placed on the three platen plates. Inking is performed for each color on each ink supply roller group, and each ink is transferred by contacting the corresponding inking roller group. The color corresponding to each printing plate is inked by each inking roller group by reciprocating the movable base.
After that, the blanket cylinder is rolled on each printing plate to transfer an image of three colors to one blanket cylinder, and the same image is transferred to a printing substrate such as a glass substrate on a printing platen to print three colors. Print. Further, the press cylinder smoothes the printing surface of the printing medium to improve the quality of the product as a filter.

On the other hand, among conventionally known multicolor proofing machines, for example, in a proofing machine for lithographic offset printing for two colors (see, for example, Patent Document 2), along both longitudinal edges of a frame (frame). A rack is provided, and two plate surface plates and a paper surface plate are arranged in a line between the pair of racks at a predetermined interval. A carriage (running base) is attached so as to be movable along the frame. Two blanket cylinders, two inking rollers (for each color) and one watering roller are provided in the carriage, and each of them rotates or moves up and down according to the movement of the carriage. . A water dampening device having a water tank and a water source roller is provided on one of the frames. A watering roller whose surface is moistened by a water dampening device rolls on a water leveling plate to make the surface water even. Also,
An inking device (ink supply device) for each color is provided at the other end of the frame, whereby an ink film is formed on the surface of each inking roller. Also in this configuration, while the carriage reciprocates from one end (water dampening device) of the frame to the other end (inking device for each color), after moistening the surface of the printing plate on each platen, Apply different color inks to each printing plate, then transfer different color ink images to corresponding blanket cylinders, and then transfer the predetermined color image to the printing paper on the surface plate. It is then printed.

[0006]

[Patent Document 1] JP-A-6-939 (pages 1 to 3,
(Fig. 1)

[Patent Document 2] Japanese Utility Model Publication No. 5-53942 (pages 1 to 3)
Page, FIG. 5 and FIG. 7)

[0007]

By the way, as shown in FIG. 12, the outer peripheral surface of one blanket cylinder 100 rolling in one direction (the direction of arrow A), and the axis 101 of the blanket cylinder 100. For example, a black square figure 102 and a red circular figure 1 are arranged in parallel with and in the same phase position.
03, the blanket cylinder 100 has a diameter D, and the image area 10 corresponding to the square figure is transferred.
2a is formed on the first printing plate 104 and the circular figure 1
It is necessary to dispose the second printing plate 105 on which the image area 103a corresponding to No. 03 is formed at a distance of πD in the direction of arrow A, and the first printing plate 104 and the second printing plate. The dimension of 105 along the direction of the arrow A is also required to be πD. Then, the blanket cylinder 100 rolls three times in the direction of the arrow A to advance the distance of 3πD in total, so that the two figures 102 and 103 can be transferred.

[0008] Therefore, in Patent Document 1, it is necessary to dispose three printing plate surface plates at a predetermined distance, and the length of the gantry must be lengthened accordingly, resulting in an increase in size of the printing machine.
Furthermore, the three printing plate surface plates must be arranged so that their heights are the same, and there is a problem in that adjustment work takes time.

When the water dampening device is arranged at one end of the frame (frame) in the longitudinal direction as in the above-mentioned Patent Document 2,
There is a problem that the printing machine becomes longer and larger accordingly.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide a compact multicolor printing machine.

[0011]

In order to achieve the above-mentioned object, a multicolor printing press according to the invention of claim 1 is provided with a blanket cylinder and a plurality of colors on a traveling table which reciprocates along a frame. An ink roller group and a water swab roller group, which correspond to each ink and can move up and down, are provided, and one paper surface plate and one plate surface plate are arranged on the frame along the moving direction of the traveling table. The length of the printing plate placed on the plate surface in the moving direction of the traveling table is set to be a multiple of the circumferential length of the blanket cylinder. An image line portion for each of a plurality of color inks is formed on the surface.

According to a second aspect of the present invention, in the multi-color printing press according to the first aspect, the plate surface plate is constituted by a cooling surface plate, and the printing plate is mounted on the upper surface of the cooling surface plate. It is placed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a printing machine according to the present invention, FIG. 2 is a plan view showing the process of movement of the ink roller and water swab roller of the present invention, and FIG. 3 is an ink application drive of the ink roller group of the present invention. 6 is a rear view showing the configuration of the first and second water rod roller groups of the present invention, FIG. 5 is a plan view enlarging a part of the portion of FIG. 3, and FIG. Is a perspective view showing an example of the printing plate 70 used in the present invention, and FIG. 7 is a printing plate 70 in the present invention.
8 is a vertical cross-sectional view of a cooling platen on which is mounted, FIG. 8 is a rear view of FIG. 4 in a state where the water rod roller is raised, FIG. 9 is an explanatory view of a state in which printing is completed by the present invention, and FIG. 11 is an explanatory view showing the process of applying ink to the printing plate 70, FIG.
FIG. 6 is an explanatory view showing a process of transferring the ink applied to the two-color graphic formed on 0 by the blanket cylinder 15.

The printing machine of the embodiment shown in FIGS.
For color printing, a pair of racks 12 and 13 extending in the left-right direction of FIG. 1 is provided on the upper surface of a frame 1 of the printing machine, and a rack gear that meshes with the pair of racks 12 and 13. The traveling platform 2 provided with 14 is on the platform 1.
Is configured to travel.

At one end of the gantry 1 (the left end in the embodiment of FIG. 1), a paper platen 11 for placing a printing paper 3 such as a calendar is arranged, Between the racks 12 and 13, a cooling platen 68 as an example of a plate platen on which the printing plate 70 is mounted is arranged and fixed adjacent to the paper platen 11. In the present embodiment, since two-color printing is performed, the length of the printing plate 70 in the traveling direction of the traveling table 2 is set to be twice the circumference of the blanket cylinder 15.

On the cooling platen 68, the printing plate 7 placed is placed.
In order to supply moisture to the surface of 0 (upper surface), a cooling coil 67 through which a low-temperature refrigerant passes is internally provided (see FIG. 7).

The traveling platform 2 has a pair of body frames 4,
5 between one blanket cylinder 15, the first water rod roller group 19 and the first ink roller group 25 to the first printing mechanism, the second water rod roller group 41 and the second ink roller group 46.
The second printing mechanism (printing means) composed of is rotatably mounted. The first water rod roller group 19 includes a pedestal 1
Is provided with a set of water rod rollers 17 and 18 in which a collar 16 sliding on the upper surface of the water rod is connected to both ends thereof, and rollers (not shown) for supplying water to the water rod rollers 17 and 18 when necessary. ing. Similarly, the first ink roller group 25 includes a pair of ink rollers 2 in which the color 20 is connected to both ends.
1, 22 and ink application rollers 23, 24 for applying ink smoothly are arranged. To the other end portion (right end portion in the embodiment of FIG. 1) of the gantry 1, a first ink for supplying one color ink to the first ink roller group 25 is provided.
An ink supply unit 6 is provided.

A second member arranged between the blanket cylinder 15 and the first water rod roller group 19 in the cylinder frames 4, 5.
The printing mechanism includes a second water roller roller group 19 having the same configuration as that of the first water roller roller group 19.
A water swab roller group 41 and a second ink roller group 46 having the same configuration as the first ink roller group 25. The second water swab roller group 41 includes rollers 39, 4 having collars 38 connected at both ends.
0, and a water supply roller or the like (not shown) for supplying water to the rollers 39 and 40 when necessary, are configured as one set.
The second ink roller group 46 is composed of a pair of ink rollers 42 and 43 having the collar 38 connected at both ends, and ink applying rollers 44 and 45. During the second movement, each of the collars 16, 20, 38 bears 47, 48, 49, 50, 51, 52, 5 at each position described later.
When the user rides on the position of 3, 54, the corresponding roller is lifted from the printing plate 70.

The second ink supply unit 7 for the second ink roller group 46 is provided on the traveling table 2 (see FIG. 1). Further, the makeup water tank for the first water rod roller group 19 and the second water rod roller group 41 is arranged in the lower part of the gantry 1 or the like, and is arranged above each water rod roller group via a pump and a hose not shown. Each of the water rods (not shown) that are installed is replenished with water.

The axes of the blanket cylinder 15, the first water rod roller group 19, the first ink roller group 25, the second water rod roller group 41 and the second ink roller group 46 are the cylinder frames 4, 5, respectively. The springs 15 ', 19', 25 ', 41' and 4 are respectively formed in the roller metal grooves 26 and 27 formed in the above.
It is configured to receive the elasticity of 6 '(FIGS. 4 and 8).
reference).

A small gear 28 driven by a motor and a large gear 2 driven by meshing with the small gear 28 are provided below the gantry 1.
9, a rod 30 connected to the large gear 29 by a pin shaft,
At the tip of the rod 30, a bifurcated link 31 that is connected to a midway portion by a pin shaft and is rotatable is arranged.
The upper end of 1 projects from the outer surface of the gantry 1 and is connected to the body frames 4, 5 of the traveling platform 2 by pin shafts.

The lower end of the bifurcated link 31 is connected to a small balance 32 pin-connected to the pedestal 1, and the traveling base 2 is mounted on the pedestal 1 via the bifurcated link 31 in accordance with the rotation of the large gear 29. To the first ink supply unit 6 are configured to be reciprocated left and right.

A long horizontal roller kneading shaft 33 (see FIG. 3) is connected to the upper end of the forked link 31 extending to the outer surface of the other body frame 5 with a pin, and the roller kneading shaft 33 is connected to the roller kneading shaft 33. Vertical bars 34 are vertically connected.
The vertical rod 3 is attached to the roller kneading crank 35 which is T-shaped in plan view and which is attached so as to be horizontally rotated on the outer surface of the body frame 5.
Connect 4 Then, the rod-shaped rollers 36 vertically connected to both ends of the roller kneading crank 35 are arranged between the circular roller kneading collars 37 connected to the shaft ends of the ink applying rollers 23 and 24 of the printing means to apply the ink. Means are configured (see FIG. 5). Thereby, as the bifurcated link 31 reciprocally rotates, the roller kneading shaft 33
Is horizontally reciprocated in the arrow A and B directions, the roller kneading crank 35 horizontally oscillates reciprocally, and the ink applying means 23, 24 (44, 44).
Since 45) rotates while reciprocating in the axial direction, the ink can be uniformly applied to the ink rollers 21, 22 (42, 43) (see FIGS. 3 and 5).

As shown in FIGS. 1, 2 and 9-11,
Inside the racks 12 and 13 on the pedestal 1, front roller bearers 47 and 48 for raising and lowering the second water rod roller group 41 and the second ink roller group 46, rear roller bearers 49 and 50, and the first water bearer. Intermediate roller bearers 51, 52 for moving up and down the rod roller group 19 and the ink roller group 25
And the end roller raising bearers 53 and 54 are arranged and fixed at a predetermined length along the traveling direction of the traveling table 2 at appropriate intervals.

As shown in FIGS. 1, 3, 4 and 8.
The upper and lower cam shafts 55 of the body are provided above the ends of the body frames 4 and 5.
To provide. A body vertical cam (rotating cam) 56 and a body vertical link 57 are provided at the end of the body vertical cam shaft 55 on the side of one of the body frames 4.
Connect and fix.

The cylinder upper and lower cams (rotating cams) 56 press the shaft of the blanket cylinder 15 so that the rack gear 14 is not completely disengaged from the racks 12 and 13, and the blanket cylinder 15 together with the spring 15 'is used to print the paper. It is configured to be raised and lowered so as to slightly rise from the printing paper surface of No. 3.

An L-shaped link (reverse) 58 pivotally supported by a pin shaft below one of the body frames 4 (see FIG. 1).
(Shown by reference) and the trunk upper and lower links 57 are connected by a pin.

On the outer side surface of the gantry 1, a body lowering bar 5 which can be swung in a perspective direction with respect to the outer side surface of the gantry 1 by a foot plate 59 '.
9 and a trunk raising bar 60 fixed to the outer surface of the gantry 1. When the foot plate 59 ′ is stepped on during the printing operation, the body lowering bar 59 is swung so as to face the moving path of the L-shaped link 58. The traveling platform 2 moves in the direction of arrow A in FIG. 1, the lower end of the L-shaped link 58 hits the body lowering bar 59, the L-shaped link 58 is rotated, and the body up / down cam 56 causes the body up / down cam 56 to move. The shaft is restrained and the blanket cylinder 15 is lowered so as to hit the printing paper surface of the printing paper 3.

On the other hand, when the traveling platform 2 moves in the direction of arrow B in FIG. 1 and the lower end of the L-shaped link 58 hits the body raising bar 60, the L-shaped link 58 is rotated in the opposite direction, The shaft of the blanket cylinder 15 restrained by the upper and lower cams 56 is opened, and the blanket cylinder 15 is slightly raised by the elasticity of the spring 15 '.

On the outer surfaces of the pair of body frames 4 and 5,
A large number of support rollers 66, 66 'are rotatably pivoted at predetermined intervals, and the water rod lifting plate 63, 63' formed long along the outer surface of the body frames 4, 5 are In a symmetrical shape, a horizontal lower surface edge along the longitudinal direction of the gantry 1 and a supporting roller 66 at a midway portion in the longitudinal direction of the lower surface edge,
A concave groove having an open downward direction into which the upper surface of 66 'can be fitted is formed.

A water rod lifting crankshaft 61 (FIGS. 3, 4, and 8) connected so as to penetrate the body frames 4 and 5.
(See FIG. 1), one end of the body frame 4 side is connected to the water rod raising crank 62 and the water rod raising sheet metal 63 by pins (see FIG. 1). An intermediate portion of an L-shaped interlocking link 64 is connected to the other end of the water rod raising crankshaft 61 on the side of the other torso frame 5, and the upper end of this interlocking link 64 is the upper and lower camshaft 55 of the trunk. It is connected to a turning lever 65 connected to the other end. The lower portion of the interlocking link 64 is connected to a water rod raising sheet metal 63 'having the same configuration as the water rod raising sheet metal 63 (see FIG. 4). Therefore, when the interlocking link 64 is rotated to the left and right, the pair of water rod lifting plates 63 and 63 'are also moved to the left and right.

The water rod raising metal plates 63, 63 'are provided with a large number of supporting rollers 66, 6 provided on the body frames 26, 27.
6 ', and when the interlocking link 64 is rotated upward in FIG. 8 by the rotation of the body up-and-down cam shaft 55, each of the support members is supported on the horizontal lower surface edges of the water rod raising metal plates 63, 63'. The rollers 66, 66 'are in contact with each other. This makes the first
The water rod roller group 19 and the second water rod roller group 41 are in the raised position (see FIG. 8).

On the contrary, when the interlocking link 64 is rotated downward as shown in FIG. 4, both the water rod raising metal plates 63, 6 are provided.
The support rollers 66, 66 'are fitted in the concave grooves in 3', and the first water rod roller group 19 and the second water rod roller group 41 are in the lowered position (see FIGS. 1 and 4).

Next, the printing process according to the present invention will be described. The printing plate 7 as shown in FIG.
0 is placed, the printing target paper 3 is placed on the paper surface plate 11, and the printing operation is executed. An image which is a mirror image of a mark such as a figure is appropriately spaced on the upper surface of the printing plate 70 having a length dimension of 2πD (corresponding to twice the length of the circumference of the blanket cylinder 15) in the direction of arrow AB. The line part is formed by phototypesetting. As an example of the graphic drawing portion, a square graphic drawing portion 71 and a circular graphic drawing portion 72 are separated by an interval of πD (corresponding to the length of the circumference of the blanket cylinder 15) in the arrow AB direction. It was created by taking a picture with photosetting. Further, in the embodiment, the distance from the end of the printing plate 70 near the B side to the square graphic drawing portion 71 is xo. In the case of two-color printing, an area half the length of the printing plate 70 along the moving direction of the carriage 2 is defined as an image area forming section for one color, and the other half area is an image area forming area for the other color. And In the embodiment, the circular non-drawing portion 71a of the square figure drawing portion 71 has the same size as the circular figure drawing portion 72. When printed on the printing paper 3 such as a calendar, the non-image area 71 of the black ink print area corresponding to the square graphic image area 71 is printed.
A print portion of red ink corresponding to the circular graphic image drawing portion 72 is formed at a position a.

When a small amount of water is adhered to the upper surface of the printing plate 70 by the first water rod roller group 19 and the second water rod roller group 41, the square figure image area 71 (non-image area 71a).
The ink is attached only to the spots between the circular graphic image area 72 and the circular graphic image area 72, but the ink does not adhere to other areas (non-image area)), and is widely known in the printing industry as a lithographic printing plate. , What is used. In the present invention, the cooling surface plate 6
The printing plate 70 placed on the cooling platen 68 for the cold air of No. 8
The moisture adheres to the upper surface of the printing plate 70 and acts so that the water supplied to the upper surface of the printing plate 70 through the water bar roller group becomes difficult to dry.

In the present invention, the description will be started from the print start state. As will be described later, the blanket cylinder 15 to which the two color inks are attached in advance is used as the printing paper 3 on the paper surface plate 11.
In the state where it is lowered so as to press the printing paper surface of
Starts to move in the right direction (direction of arrow B) of the gantry 1 and prints on the printing paper 3. At this time, the first water rod roller group 19 and the second water rod roller group 41 located on the right side of the blanket cylinder 15 are first removed from the printing surface of the printing paper 3 by the water rod raising sheet metal 63, 63 ′. It is in a raised position in a floating state.

The traveling platform 2 is to the right of the platform 1 (direction of arrow B)
10, the ink rollers 21 and 22 of the first ink roller group 25 move toward the spring 2 as shown in FIG.
Upon receiving the urging force of 5 ', the roller bearers 53 and 54 descend, and black ink is applied to the square graphic image area 71 of the printing plate 70. On the other hand, the ink rollers 42 and 43 of the second ink roller group 46 receive the urging force of the spring 46 ′ and descend from the front roller bearers 47 and 48, and the printing plate 7
It moves to the right while adhering the red ink to the circular graphic drawing area 72 of 0. In this case, the first water rod roller group 19 and the second water rod roller group 41 do not descend.

When the blanket cylinder 15 finishes printing on a predetermined portion of the printing paper 3 on the paper surface plate 11 and further moves in the right direction (direction of arrow B), the blanket cylinder 15 is kept in the lowered state and the printing plate 70 Circular graphic drawing part 72 and square graphic drawing part 7
The ink at the position 1 is transferred to the blanket cylinder 15 (see FIG. 11).

That is, when the traveling platform 2 moves forward in the direction of the arrow B, a part of the circumferential surface of the blanket cylinder 15 that rolls is first covered with the circular graphic image drawing portion 72 of the printing plate 70.
After the red ink applied to the blanket cylinder 15 is transferred, the blanket cylinder 15 moves forward a little further, and the black ink applied to the square graphic image area 71 is applied to the other part of the circumferential surface of the blanket cylinder 15. It is transcribed.

The traveling platform 2 is the right end portion of the platform 1 (state of FIG. 1).
When it is positioned at, the blanket cylinder 15 is held in the raised state. Next, the traveling platform 2 moves to the left of the platform 1 (arrow A
Blanket cylinder 15 remains elevated when moving in the direction). On the other hand, the first water rod roller group 19 and the second
The water bar roller group 41 descends at a predetermined position on the upper surface of the printing plate 70 on the cooling platen 68 to wet the upper surface of the printing plate 70, while the second ink roller group 46 and the first ink roller group 25 are The ink of the corresponding color is lowered at a predetermined position of the printing plate 70, and the corresponding square graphic drawing line portion 71 and the circular graphic drawing line portion 72 are applied. Therefore, in the present embodiment, the ink of the predetermined color is applied twice to the predetermined portion of the printing plate 70 during one reciprocating right and left of the traveling table 2.

As described above, the blanket cylinder 15 rolls on a predetermined portion of the printing paper 3 (for example, calendar paper) stacked on the surface plate 11 while the black square image is drawn. Line portion 71 and red circular graphic drawing line portion 72
Will be printed.

As described above, in the case of two-color printing, the printing plate 70 has a length twice the circumference of the blanket cylinder 15.
In addition, the distance from the square graphic drawing portion 71 to the circular graphic drawing portion 72 is defined as a distance πD for one rotation of the blanket cylinder 15.
(D is the diameter of the blanket cylinder 15) (see FIG. 6), after the red circular figure 72 is transferred to the blanket cylinder 15 in the black square figure drawing area 71, Further, it can be moved to the position of the paper surface plate 11 and two-color printing can be performed in a state where the red circular graphic 72 is inserted in the black square graphic on the printing paper 3.

In this way, by one reciprocating movement of the traveling table 2, it is possible to print the trade name and trademark of the ordered company in two colors on the lower end of the calendar paper.

The distance (distance) between the image area of one color ink to be placed on one printing plate 70 and the image area of another color ink is not necessarily the diameter D of the blanket cylinder 15. The value does not have to be multiplied by π, but it is not possible to form image areas of different colors side by side at positions where the distance xo from one edge of the printing plate 70 (see FIG. 6) is the same.

The above-described embodiment is a case of two-color printing, and therefore, the first set including the first water rod roller group and the first ink roller group corresponding to one color ink, and the other one. A second set consisting of a second water swab roller group and a second ink roller group corresponding to color inks and one blanket cylinder are mounted on the running table 2, but in the case of three-color printing, three
A set of water rod roller group and ink roller group and one blanket cylinder are mounted on the running table, while the length of the printing plate on the platen is such that the blanket cylinder rotates three times (the blanket cylinder circle It should be set equal to 3 times the circumference).

[0047]

As described above in detail, according to the present invention, it is possible to print multi-colored figures and characters on the lower end of each sheet of paper to be printed by a single operation. It is economical because it is not necessary to use multiple printing machines for color printing. In addition, the troublesome process of printing the paper to be printed while moving it between a plurality of printing machines is unnecessary, the working time can be shortened, and the trouble of aligning the printing position in the case of multicolor printing is eliminated. The effect of improving productivity can be obtained.

Further, one printing plate may be placed on one plate platen to be arranged in a row with the paper platen, and an image line for a color difference may be placed at a predetermined portion of the one printing plate. Since the parts can be formed all at once, the work for registering the position for the printing work can be reduced. Then, since the length of the printing plate (the length along the moving direction of the traveling table) is set to be equal to the value obtained by multiplying the circumferential length of the blanket cylinder by the number of colors, as in the conventional case, Compared to a multi-color printing machine in which plate plates on which printing plates are placed are spaced apart by the circumferential length of the blanket cylinder, the length in the moving direction of the running table can be shortened, resulting in compact multi-color printing. The effect that a printing machine can be provided is produced.

Further, since only one plate surface plate is arranged, the labor of adjusting work such as level adjustment on the gantry is reduced, and work efficiency is improved.

If the upper surface side of the plate surface plate is configured as a cooling surface plate, the floor surface (lower surface) of the printing plate placed on the plate surface is cooled, so that the upper surface of the printing plate plate is cooled due to the difference from room temperature. Since moisture is made to adhere, as compared with the conventional configuration in which water is supplied to the water bar roller to remove the ink on the upper surface of the printing plate and moisten it, the moisture on the upper surface of the printing plate is dried. Can be reduced and the print quality can be improved. Also, 1
Since only one cooling surface plate is required, the piping for the refrigerant etc. to be supplied to the cooling surface plate will be simple, and the adjustment work will be less than the adjustment work to cool multiple cooling surface plates to the same degree. Produce an effect.

[Brief description of drawings]

FIG. 1 is a front view of a printing machine according to the present invention.

FIG. 2 is a plan view showing an advancing process of the ink roller and the water rod roller of the present invention.

FIG. 3 is a rear view showing the ink application drive of the ink roller group of the present invention.

FIG. 4 is a rear view showing the configuration of first and second water rod roller groups of the present invention.

5 is an enlarged plan view taken along the line VV of FIG.

FIG. 6 is a perspective view showing an example of a printing plate 70 used in the present invention.

FIG. 7 is a vertical sectional view of a cooling platen on which a printing plate 70 is placed.

FIG. 8 is a rear view of the water rod roller of FIG. 4 in a raised state.

FIG. 9 is an explanatory diagram of a state where printing is completed.

FIG. 10 is an explanatory view showing a process of applying ink to the printing plate 70 from FIG.

FIG. 11 is an explanatory diagram showing a process of transferring the ink applied to the image parts of two colors formed on the printing plate 70 by the blanket cylinder 15.

FIG. 12 is a perspective view for explaining a positional relationship between a blanket cylinder and two printing plates in a conventional two-color printing press.

[Explanation of symbols]

1 stand 2 platform 3 Printed paper 11 Paper surface plate 15 blanket body 19 First water rod roller group 25 First Ink Roller Group 41 Second water rod roller group 46 Second ink roller group 68 Cooling surface plate 70 printing plates 71, 72 Drawing part of figure of different ink colors

Claims (2)

[Claims] 1. A traveling platform that reciprocates along a gantry.
One blanket cylinder and multiple color inks are supported.
And an ink roller group and a water rod roller group that can be moved up and down, and one paper surface plate and one plate surface plate are arranged in a row along the moving direction of the traveling table on the frame. The length in the moving direction of the traveling table of the printing plate placed on the platen,
A multicolor printing press, characterized in that the blanket cylinder is set to have a circumferential length of a plurality of times and the printing plate surface is provided with image portions for a plurality of color inks. 2. The multicolor printing press according to claim 1, wherein the plate surface plate is constituted by a cooling surface plate, and the printing plate is placed on an upper surface of the cooling surface plate.