JPH08108515A - Printer - Google Patents

Abstract

PURPOSE: To efficiently product a printed matter with a high printing accuracy. CONSTITUTION: A turntable 52 which is intermittently rotated at each predetermined angle by a motor 54 is provided, and plate tables 57A-57D loaded with intaglios 58A-58D are fixed to the outer periphery of the table 52. A squeegee 59 and a doctor 61 are provided on the tables 57A-57D, so that inks 60A-60D supplied to the tables 57A-57D can fill the recesses of the intaglios 58A-58D by the doctor 61. A rubber cylinder 68 is fed while rotating between the table 57A (57B, 57C, 57D) stopped at a predetermined position and the table 65 loaded with a printed matter 65, thereby transferring the images of the intaglios 58A-58D to the matter 65 via blankets of the cylinder 68 to be printed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing machine for transferring an image on a printing plate onto a blanket of a printing cylinder and transferring the image onto a printing medium for printing.

[0002]

2. Description of the Related Art As a printing machine of this type, a printing machine equipped with a flat plate and a printing cylinder that rotates in contact with the plate is known.
For example, as disclosed in JP-A-62-94341,
The configuration and operation of this printing machine will be described. 3 to 6
Shows a printing machine disclosed in this publication, FIG. 3 is a plan view of the printing machine shown without a printing cylinder, FIG. 4 is a front view seen from IV of FIG. 3, FIG. 5 is a side view of the printing machine, and FIG. [Fig. 3] is a side view of the printing machine shown by a gear meshing portion.

[0003] In these figures, the vertical members on both sides of the frame 16 formed in a U-shape in a front view and in an inverted T-shape in a side view are provided with rubber as a printing cylinder having blankets mounted on their peripheral surfaces. The body 17 is rotatably supported,
Below the blanket cylinder 17, a pedestal 18 formed in a U-shape when viewed from the front is supported by a pair of rails 19 laid on the bottom plate of the frame 16 so as to be movable back and forth, and is disposed inside the frame 16. ing.

A pair of racks 20 laid parallel to each other on both upper end surfaces of the pedestal 18 mesh with pinions 21 fixed to both ends of the blanket cylinder 17, and the rack 20 includes a frame 16 The driving gear 23 axially attached to the motor shaft of the side motor 22 is meshed. As a result, when the driving gear 23 is driven by the motor 22 to rotate in the forward direction or the reverse direction, the gantry 18 moves forward or backward via the rack 20 meshing with the forward gear 23, and the rack 2
The blanket cylinder 17 is configured to rotate in the forward direction or the reverse direction by the engagement of 0 and the pinion 21.

Reference numeral 24 is a plate surface plate which is located in the front part of the gantry 18 and is supported by a bottom plate of the gantry 18 through a horizontal adjusting member.
8 is a platen for a rectangular object to be printed, which is supported by a bottom plate 8 of FIG.
As shown in FIG. 6, an intaglio plate 26 as a printing plate is placed and fixed on the plate 4, and a platen 25 for an object to be printed is provided.
As shown in FIG. 4, a plate-shaped object to be printed 27 is placed and fixed thereon.

The pair of racks 20 are each divided into two in the longitudinal direction, and between the divided racks 20,
Three sets of evacuation racks 28, 29, 30 that mesh with the pinion 21 are provided in front of and behind the rack 20 so as to be vertically movable.
Is configured to move up and down by an eccentric cam, an air cylinder, or the like (not shown) so as to mesh with the pinion 21 or to be disengaged and retract.

Above the intaglio plate 26, there are provided an inking squeegee 32 which is lifted up and down by an air cylinder 31 so as to be attached to and detached from the plate surface, and a doctor 34 which is raised and lowered so as to be attached to and detached from the plate surface by an air cylinder 33. The air cylinder 3 is provided diagonally above the blanket cylinder 17.
Ink wiping rollers 37 and 38, which move so as to be attached to and detached from the blanket surface of the blanket cylinder 17 by 5 and 36, are provided. Reference numeral 39 is a plate surface cleaning roller which moves so as to be attached to and detached from the intaglio plate 26 by an air cylinder 40, and 41 is a hot air blower which is disposed obliquely above the blanket cylinder 17 and blows hot air onto the blanket surface of the blanket cylinder 17. is there.

The air cylinders 31 and 33 are fixed to a support frame 43 which is supported by guide shafts 42 on both side vertical members of the frame 16 so as to be capable of advancing and retracting at both ends. Air cylinder 44
The working end of the piston rod 45 moving forward and backward is fixed. By doing so, when the piston rod 45 moves back and forth by the air pressure, the support frame 43 moves forward and backward in the moving direction of the gantry 18, and the air cylinders 31 and 33 move forward and backward in the same direction.

Reference numeral 46 in FIG. 6 is an eccentric bearing, which is rotated by an air cylinder 47 in FIG. 4 so that the blanket surface is in contact with the surface of the intaglio plate 26. The blanket cylinder 17 is configured to move between the blanket state in which the blanket surface is separated from the surface of the intaglio plate 26. The operation of the conventional printing press configured as described above will be described. In the state shown in FIG. 6, when the blanket cylinder 17 is put in the eccentric bearing 46 and then the motor 22 is rotated in the normal direction, the driving gear 23 rotates and the rack 18 is engaged with the gantry 18. Moving to the left in the figure, the movement of the gantry 18 is stopped in a state in which the front evacuation rack 30 is located directly below the pinion 21. Ink is supplied to the plate surface by the inking squeegee 32 during this movement.

After that, when the blanket cylinder 17 is pulled out and the motor 22 is rotated in the reverse direction, the driving gear 23 is rotated and the rack 18 is engaged with the pedestal 18 to move it to the right in FIG. , The central rack 28 is the blanket cylinder 17.
The movement of the gantry 18 is stopped at a position just below. During this movement, the doctor 32 scrapes off excess ink other than the recesses on the plate surface. Then, the central advancing / retracting rack 28 is lowered to lower the pinion 21.
The blanket cylinder 17 is idled up to a predetermined rotational phase position after the engagement with and is released, and then the central advancing / retreating rack 28 is raised to engage with the pinion 21.

Then, the object 2 to be printed is placed on the surface plate 25 for the object to be printed.
When 7 is placed and fixed, and then the blanket cylinder 17 is put in the barrel-inserted state and the motor 22 is rotated in the reverse direction, the pedestal 18 moves to the right in FIG. 6, and the rear rack 29 is covered with rubber as shown in FIG. The movement of the gantry 18 stops at a position just below the torso 17.
During this movement, the image formed on the surface of the intaglio plate 26 is transferred to the blanket surface of the blanket cylinder 17.

Next, when the blanket cylinder 17 is pulled out and the motor 22 is rotated in the forward direction, the driving gear 23 is rotated, and the rack 18 is engaged with the pedestal 18 to move leftward in FIG. At the position where the advancing / retreating rack 28 reaches just below the blanket cylinder 17, the movement of the gantry 18 stops, the central advancing / retreating rack 28 descends, and the meshing with the pinion 21 is released. After letting it spin up to the center, the central advancing / retreating rack 28 is raised to the pinion 21.
After that, the blanket cylinder 17 is put in the cylinder insertion state and the motor 22 is rotated forward to move the gantry 18 leftward in the drawing. During this movement, the image on the blanket surface of the blanket cylinder 17 is transferred to the printing material 27 and printed.

After printing, when the blanket cylinder 17 is in the unrolled state and the motor 22 is rotated in the reverse direction, the gantry 18 moves to the position shown in FIG. 6, so that one printed work can be performed by removing the printed object 27 to be printed. finish.

[0014]

However, in such a conventional printing press, since only one color can be printed in one printing, in the case of multicolor printing, the printing material is replaced for each color and the printing registration is performed. Since the setup operation for aligning with each other must be repeated, a long time is required for this setup, and not only the productivity is lowered, but also the images of the respective colors are likely to be displaced, and high printing accuracy cannot be expected.

The present invention has been made in view of the above points, and an object thereof is to provide a printing machine capable of efficiently producing a printed matter having high printing accuracy.

[0016]

In order to achieve such an object, in the invention according to claim 1, the outer peripheral portion of the revolving table which is driven by the driving device and intermittently revolves by a predetermined angle in the circumferential direction. A plurality of plate tables with flat surfaces for placing the printing plates are arranged in each of the plurality of parts, and the ink supply squeegee and the ink scraping doctor can be moved horizontally on each of these plate tables. The guide rail is laid between the plate table to be stopped and the printing table on which the printing object is placed, and between the plate on the plate table to be stopped and the printing object on the printing table. A printing cylinder is provided which reciprocates along the guide rail and transfers the image transferred from the printing plate to the printing medium.

In a second aspect of the present invention, a driving device that reciprocates while rotating the printing cylinder is fixed to a motor supported on the printing cylinder side and an end shaft of the printing cylinder and driven by the motor. It consists of a rotating pinion and a rack laid parallel to the guide rail that meshes with the pinion.

[0018]

The plate is fixed on each plate table, and the object to be printed is fixed on the printing table. On the other hand, when each color ink is supplied to each plate table by a squeegee and the squeegee and the doctor are reciprocally moved along the guide rail, each ink is supplied to the printing plate, and excess ink is scraped off by the doctor. .

When printing is started in this state, the revolving table is rotated by the driving device and the printing cylinder stops at a predetermined position. Next, when the printing cylinder is driven by the driving device to rotate, the printing cylinder moves from the stop position toward the printing table. During this movement, the printing cylinder rolls on the printing plate at the beginning of the movement, so that the image on the printing plate is transferred to the printing cylinder. Further, the printing cylinder moves and rolls on the printing material, whereby the image of the printing cylinder is transferred to the printing material and printing is performed.

The printing cylinder that has finished printing the first color moves forward, is positioned above the printing plate, and stops, so that the swivel table rotates and the second color plate table is positioned directly below the printing cylinder. And stop. After that, the second color is printed by the same operation as the first color printing, and the third and fourth colors are further printed, so that four-color printing is performed on the printing material.

[0021]

1 and 2 show an embodiment of a printing machine according to the present invention, FIG. 1 is a plan view of the printing machine, and FIG. 2 is a front view of the same. In these figures, a column-shaped hole 51a is provided at the front end of a bed 51 which is formed in a laterally T-shape in plan view and is fixed on the floor. The hole 51a is a disk-shaped rotation. A rotating shaft 52b of a revolving table 52, which is integrally formed by a plate 52a and a cylindrical rotating shaft 52b that projects downward from the center of the plate 52a, is pivotally supported via upper and lower rolling bearings 53. .

A motor 54 is fixed to the side surface of the bed 51, and a small gear 55 axially attached to the rotary shaft of the motor 54 and a large gear 56 axially attached to the rotary shaft 52b of the turning table 52. The turning table 52 is driven by a motor 54 and is rotated by a predetermined angle, 90 ° in this embodiment.
It is configured to turn intermittently. Rectangular plate plates 57A, 57B, 57C and 57D are fixed to respective places where the outer peripheral portion of the rotary plate 52a of the revolving table 52 is divided into a plurality of equal parts in the circumferential direction, that is, into four equal parts in the present embodiment. Tables 57A, 57B and 5 for each of these plates
Intaglio 58A, 5 as a printing plate on the plane of 7C, 57D
8B, 58C, and 58D are configured to be placed.

Further, each plate table 57A, 57B, 57
C and 57D are provided with squeegees 59 for ink supply, and the plate tables 57A, 57B, 57C and 57 are provided.
The squeegee 59 supplies inks 60A, 60B, 60C and 60D of different colors to the plane D. The reference numeral 61 is parallel to the squeegee 59 and is parallel to the plate tables 57A, 57B, 57.
Ink doctors provided on C and 57D. The doctor 61 is formed so as to be movable in the horizontal direction together with the squeegee 59. The squeegee 59 and the doctor 61 are provided on the plate tables 57A and 57B. , 57
It is configured to reciprocate along the guide rail 63 by an actuator (not shown) provided in C and 57D.

In this way, when the actuator (not shown) reciprocates the squeegee 59 and the doctor 61, the inks 60A, 60B supplied by the squeegee 59,
60C and 60D are intaglio plates 5 in the forward movement of the doctor 61.
8A, 58B, 58C, and 58D, and excess ink 60A, 60B, 60C, and 60D is supplied on the return path.
Is configured to be scraped off by the doctor 61.

Further, a rectangular printing table 64 is fixed to the upper surface of the rear end of the bed 51.
An object to be printed 65 is placed and fixed on the printing table 64. Each plate table 57A, 57B,
57C and 57D are configured to stop on a line connecting the center of the swivel table 52 and the center of the printing table 64, and stop the plate table 57A (57B, 57C, 5D).
7D) and both sides of the printing table 64,
The pair of left and right guide rails 66 are parallel to each other and the bed 5
It is fixed to the upper surface of 1.

Reference numeral 67 is a rectangular plate-shaped frame movably formed along the left and right guide rails 66, and the bearing holes of these left and right frames 67 serve as a printing cylinder having a blanket mounted on its peripheral surface. Both end shafts 68 of the blanket cylinder 68
a is rotatably supported, and a pinion 69 is pivotally attached to an end portion of each end shaft 68a protruding from the frame 67.

On the outside of the guide rail 66,
A pair of left and right racks 70 meshing with the pinion 69 are fixedly laid on the guide rails 66, and the pinion 72 on the side of the motor 71, which is fixed to the frame 67 as a drive device, is an end of the blanket cylinder 68. It meshes with the body gear 73 fixed to the shaft 68a. By doing so, when the rotation shaft of the motor 71 rotates, the blanket cylinder 68 rotates due to the meshing of the pinion 72 and the large gear 73. At this time, however, the pinion 69 meshes with the rack 70. Moves along the guide rail 66 while rotating,
When rolling on the intaglio 58A (58B, 58C, 58D), the image of the intaglio 58 is transferred to the blanket of the blanket cylinder 68, and when rolling on the printing material 65, this image is transferred to the printing material 65. It is configured to be printed.

The operation of the printing press configured as described above will be described. Each plate table 57A, 57B, 57C, 57D
The printing object 64 is placed and fixed on the printing table 64 on which the intaglio plates 58A, 58B, 58C and 58D are placed and fixed. Each plate table 57A, 57B, 57C, 57D
4 colors of ink 60A, 60B, 60 with squeegee 59
When C and 60D are supplied and the squeegee 59 and the doctor 61 are reciprocated along the guide rail 63, each ink 60
A, 60B, 60C, 60D are intaglio 58A, 58B, 5
The excess ink is supplied to the plate surfaces of 8C and 58D, and excess ink is scraped off by the doctor 61.

As shown by reference numeral 68A in FIG. 2, the blanket cylinder 68 is stopped corresponding to the front end of the guide rail 66 with the boundary between the notch and the blanket facing downward. When printing is started in this state, the motor 54 rotates and rotates due to the meshing of the small gear 55 and the large gear 56, and as shown in FIG. 2, the plate table 57A is placed in the turning table 52 and the printing table 64. Stop on the line connecting the center of the.

Then, when the rotary shaft of the motor 71 rotates and the blanket cylinder 68 rotates due to the engagement of the small gear 72 and the large gear 73, the blanket cylinder 68 engages with the rack 70 by the engagement of the pinion 69 and the rack 70. While rolling on 70, it moves from the stop position toward the printing table 64. At the time of this movement, the blanket of the blanket cylinder 68 rolls on the intaglio 58A at the starting end of the movement, so that the intaglio 5
The image of 8A is transferred to the blanket of the blanket cylinder 68.
Further, the blanket cylinder 68 moves and rolls on the printing material 65 as indicated by reference numeral 68b in FIG. 2, whereby the image of the blanket is transferred to the printing material 65 and printing is performed.

The blanket cylinder 68 that has finished printing the first color moves to the front and stops above the intaglio plate 58A. Then, the turning table 52 is rotated by 90 ° and the plate table 57B for the second color is positioned immediately below the blanket cylinder 68 and stopped.
Thereafter, the second color is printed by the same operation as the first color printing, and the third and fourth colors are further printed, so that the printing material 65 is printed with four colors.

In the present embodiment, the motor 71, the gears 72 and 73, the rack 70, and the pinion 79 are used as the moving device for the blanket cylinder 68, but the invention is not limited to this. For example, the screw shaft may be rotated and the blanket cylinder 68 may be moved via a nut screwed with the screw shaft.

[0033]

As is apparent from the above description, in the invention described in claim 1, the outer peripheral portion of the turning table which is driven by the driving device and intermittently turns by a predetermined angle is divided into a plurality of equal parts in the circumferential direction. At each position, a plurality of plate tables having a flat surface on which the printing plate is placed are provided, and the ink supply squeegee and the ink scraping doctor are supported on the plate tables so as to be movable in the horizontal direction. A guide rail is laid between the plate table to be stopped and the printing table on which the material to be printed is placed, and the guide rail is provided between the plate on the plate table to be stopped and the material to be printed on the printing table. By providing a printing cylinder that reciprocates and transfers the image transferred from the printing plate to the printing substrate, it is possible to perform printing in multiple colors without repeating setup work. With can be greatly improved, the quality of the printed matter can be improved.

According to a second aspect of the present invention, a drive device for reciprocating while rotating the printing cylinder in the first aspect is a motor supported on the printing cylinder side, and an end shaft of the printing cylinder. It is possible to achieve the above effect with a simple structure by using a pinion that is fixed to the motor and rotates by being driven by a motor, and a rack that is laid parallel to the guide rail that meshes with this pinion. Is.

[Brief description of drawings]

FIG. 1 is a plan view of a printing machine.

FIG. 2 is a side view of the printing machine.

FIG. 3 is a plan view of a conventional printing machine shown without a printing cylinder.

FIG. 4 is a front view seen from IV in FIG.

FIG. 5 is a side view of a conventional printing machine.

FIG. 6 is a side view of a conventional printing machine, which is shown at a meshing portion of gears.

[Explanation of symbols]

 52 Swivel table 54 Motor 55 Small gear 56 Large gear 64 Printing tape 57A Plate table 57B Plate table 57C Plate table 57D Plate table 58A Intaglio 58B Intaglio 58C Intaglio 58D Intaglio 59 Squeegee 60A Ink 60B Ink 60C Ink rail 61 Printing 63 Guide 65 Printed Material 66 Guide Rail 67 Frame 68 Blanket Body 69 Pinion 70 Rack 71 Motor 72 Pinion 73 Large Gear

Claims (2)

[Claims] 1. A turning table driven by a driving device to turn intermittently by a predetermined angle, and a plate mounting surface which is arranged at each of a plurality of circumferentially divided outer peripheral portions of the turning table. A plurality of plate tables, an ink supply squeegee and an ink scraping doctor movably supported in a horizontal direction on each of these plate tables, and a printing table on which the plate table to be stopped and an object to be printed are placed. Between the printing plate on the plate table and the printing material on the printing table to be stopped along the guide rail, and the image transferred from the printing plate is transferred onto the printing plate. A printing machine comprising a printing cylinder for transferring the printed matter. 2. A driving device that reciprocates while rotating the printing cylinder, a motor supported on the printing cylinder side, and a pinion fixed to an end shaft of the printing cylinder and rotated by being driven by the motor. The printing machine according to claim 1, wherein the printing machine comprises a pinion and a rack that is meshed with the pinion and is laid parallel to the guide rail.