JPH0717046B2 - Printer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing machine having a transfer cylinder and a press surface on a rotary cylinder of a printing machine, and relates to a pressure type relief or intaglio printing machine, and in particular, an offset type printing machine. In the printing, the printing blanket cylinder is rotatably supported by the frame of the printing machine main body, and the printing plate surface plate and the work (printing material) surface plate are reciprocatingly movable, and the rotating cylinder is made idle. The present invention relates to a printing machine having a press function for smoothing the printing ink surface after printing a work.

(Prior Art) Generally, as a circular pressure type printing machine, for example, a fixed rotary type is used as an impression cylinder that holds a sheet to be printed and prints, and a printing plate surface plate and a printing pressure surface plate are horizontally movable. There is a letterpress flatbed printing machine. The impression cylinder of this printing machine grips the printing sheet and supplies it to the phase position of the plate motion to be printed while rotating and transfers the ink directly from the plate surface to the sheet for printing. It was not a so-called offset printing method in which printing was performed via a blanket cylinder.

Further, in the conventional pressure printing machine, since the length of the surface plate and the length required for the reciprocal sliding of the surface plate are determined at least according to the diameter of the impression cylinder, the size of the machine is It had to be large according to the diameter of the impression cylinder.

Further, generally, when the ink is transferred from the transfer surface to the printing medium, splitting occurs between the ink layers, resulting in unevenness on the upper surface of the transfer ink layer on the printing medium. In order to remove this unevenness, it was necessary to smooth the upper surface of the ink layer in the step after printing.

(Object of the Invention) The present invention provides a novel printing machine that includes a transfer surface and a press-smoothed surface on a printing rotary cylinder, and is capable of smoothing the upper surface of a transfer ink layer on a printing medium simultaneously with printing. To do.

(Structure of the Invention) The present invention meshes with a plate surface plate and a work surface plate that are arranged to be supported and arranged on a printing platform that slides on rails provided on both sides of the main frame, and rack gears provided on both sides of the platform. A printing machine provided with a pinion gear, a fixed rotary cylinder for performing printing while being in contact with the plate surface plate and the work surface plate, and having a transfer surface and a press surface on the peripheral surface of the rotary cylinder.

Further, the rack gear in the present invention is a printing machine characterized in that a desired length of the gear at a predetermined position facing each other moves away from the pinion gear, and then retracts, and the rack gear is provided with a shaft. A printing platform that includes a rotating cylinder that is supported and rotates and a rack gear that meshes with a pinion gear of the cylinder and that reciprocates is provided with a printing plate surface plate and a printing material surface plate, and the rack gears on both sides of the frame are the same. The retractable rack gear that can be disengaged at the phase position is provided so that the rotating drum can idle at that position.

The present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a printing machine of the present invention, in which (1) is a fixed rotary cylinder pivotally supported by a main body side frame (12), (3) and ( 6) are a plate surface plate and a work surface plate, which are arranged in this order on the printing frame (9), (11) is a rail for mounting and guiding the frame (9), and (10) is printing for fixing the rail. Machine frame, (17) rack gears on both sides of the rack (9),
(18) is a pinion gear provided on both sides of the rotary cylinder (1) and meshes with the rack gear (17), and (32) is a rack gear (17), for example, both front and rear sides of the printing platform (9), and a platen (3). It is a retractable rack gear provided at a position opposed to the work surface plate (6). (16) is a driving gear that meshes with the rack gear (17) and is driven by a driving motor (pulse motor (19). (34) is an idle gear that meshes with the pinion gear (18) of the rotating drum (1). , Driven by the motor (35).

The printing machine of the present invention comprises a transfer surface in which a rubber blanket (2) such as silicon is mounted on the peripheral surface of the fixed rotary cylinder (1), and the peripheral surface of the rotary cylinder (1) facing the transfer surface is
A press working surface (45) having a silicon resin layer on its surface is held, and an intaglio printing plate (5) is mounted on the surface plate (3), and a glass substrate or the like is mounted on the surface plate (6) as a printing object (8). Then, the air cylinder (22) is located above the platen surface (3).
Ink squeegee (24) and doctor (25), which are moved up and down by (23) respectively, are provided, and urethane ink wipes that are in contact with and retracted by air cylinders (20) (21) before and after the rotating drum (1). Rollers (13) (14)
And a plate surface cleaning roller (43) that moves up and down by an air cylinder (44) is provided on the printing plate surface side, if necessary. Further, an air blower (15) for blowing hot air is provided in the vicinity of the peripheral side surface of the rotating drum (1).

In FIG. 1, (4) is an adjusting device for adjusting the height and horizontal state of the surface plate (3), and (7) is an apparatus for adjusting the surface plate (6) in the same manner. It is fixed.

FIG. 2 is a plan view of FIG. 1, in which rack gears (1) are provided on both sides of the gantry (9) in the sliding movement direction, and the rack gears (17) are provided at positions corresponding to the front and rear ends of the surface plates (3) (6). A retract rack gear (32) is partially provided. The sliding contact portion of the retractable rack gear adjacent to the rack gear (17) is of a slide fitting type, and is vertically moved by an eccentric cam, an air cylinder, or the like, and by a lowering operation, the pinion gear (18) of the rotary drum (1) The mesh can be released.

In FIG. 2, (24) is a squeegee, (25) is a doctor, (27) is a frame supporting the squeegee and the air cylinder (22) for operating it, and (29) is supported by the frame (27). The doctor frame swings in a fitted state with respect to the frame. (28) is a guide rail for guiding the doctor frame (29), and (37) is a shaft connected to the doctor frame (29) by a shaft. (36) is a fixed cylindrical cam that fits with the cam follower (37), (38) (39) is a pinion gear that rotates the cam follower, and (40) is a pinion gear (39).
Is a motor that drives the rotation. Also, the rotating body (1)
As a mechanism for releasing the printing pressure on the plate (3a) and the printing medium (6a) to rotate the cylinder (1), an eccentric bearing (41) is provided on one shaft side of the cylinder (1) and It is performed by reversing and rotating by the attached air cylinder (42).

FIG. 3 is a front view of the printing machine of the present invention. For example, a plurality of surface plates (3) and surface plates (6) may be arranged in the printing width direction. FIG. 4 is a control system diagram of the printing machine of the present invention. As a basic printing procedure, a work (printing material) set → inking into a plate (squeezing → doctoring) → from plate to blanket Printing → printing from blanket to work → pressing of image forming ink on work surface → taking out printed work.

The printing machine of the present invention is implemented in accordance with an operating system computer program as shown in FIG. 5, for example. First, the programmable sequencer is operated, the AC servomotor (pulse motor) (19) having a braking mechanism is started by the number of signal pulses from the motor numerical control device according to the program, and the mount (9) is rotated to the rotating cylinder (1). Immediately below, the retractable rack gear (32) is moved by a predetermined amount until it is stopped, and then stopped, and, for example, the gear (32) is lowered in accordance with the following program to rotate the rotary drum (1).
The motor (35) capable of rotating in the normal direction and in the reverse direction causes the motor to idle at a predetermined rotation phase position. Then, for example, the retract rack gear is further returned to the original position according to the program, meshed with the pinion gear (18) of the rotating drum (1), and the return of the gear (32) is detected by a desired detector (public power system or limit switch). The servo motor (19) is started at the time detected by, and the gantry (9) further advances to the next surface plate (6).
Rotating cylinder up by a predetermined amount according to the program (1)
Sideways, for example, a point C where the outer edge of the surface plate (6) is off
The gantry (9) is moved to the position of the evacuation rack gear (32) at. Then, by the following program, the rack gear (32) at the point C is lowered to idle the rotating cylinder (1) in the normal rotation or reverse rotation direction, and after setting the cylinder (1) to a desired phase, The gear (32) is raised and returned, the servomotor (19) is started by the number of pulses according to the program, and the gantry (9) is returned to its original position or moved by a predetermined amount.

The printing machine of the present invention is a press machined with a silicone resin on the surface at a position symmetrical to the mounting position of the transfer blanket (2) on the outer peripheral surface of the rotating drum (1) which is pivotally supported by the body frame and rotates. A hard rubber sheet for application is attached and a pressurizing surface (45) is provided, and the ink film surface on the printing object (8) transferred and printed by the blanket (2) is pressed to obtain the flatness of the film. For imparting smoothness, the rotary cylinder (1) is rotated to transfer the ink in the concave portions of the intaglio plate (5) to the blanket (2), and then the printing medium (8) on the surface plate (6) is transferred. ) Is moved to the lower side of the blanket (2), and the ink on the surface of the blanket (2) is transferred and printed on the printing medium (8). After that, the rack (9) moved to the left end is lowered by the retracting rack gear (32) to match the contact phase between the pressurizing surface (45) and the printing medium (8), and the rotary drum (1). The motor (3
By 5), it is made to idle to change the phase by 180 degrees, and the contact phase between the pressurizing surface (45) and the printing medium (8) is matched.
Then, the rack gear (32) is raised to rotate the rotating drum (1).
The press-pressing surface (45) of the rotary cylinder (1) presses the ink coating surface of the object to be printed (8) while moving the gantry (9) to the right in the drawing by engaging with the cylinder. . This improves the smoothness of the ink film surface of the printing object (8), and for example, the uneven depth of the ink film surface can be made within 2 μm.

The press pressurizing surface (45) provided in the printing machine of the present invention may be one in which a plate having a silicon coating resin layer on the surface thereof or made of a metal plate such as aluminum is attached to the rotary drum (1), The circumferential surface of the rotary cylinder (1) can be used as the pressing surface as it is.

(Operation of the Invention) According to the printing machine of the present invention, the printing base (9) can be reciprocally slid with respect to the fixed rotary drum (1) while being intermittently stopped halfway. In 1), it is possible to make the wheel idle when stopped.
For example, when used as a printing machine for intaglio offset printing, the ink on the blanket (2) surface transferred from the intaglio is transferred from the blanket to the material to be printed (8), and then the ink is pressed by the press rubber sheet (45). The upper layer can be smoothed.

In the printing operation of the printing press according to the present invention, it is possible to change the operation sequence and operation duration time by installing a programmable sequencer.

(Effects of the Invention) The printing machine of the present invention can be applied to a pressure type relief printing machine or an intaglio printing machine depending on the structure of the rotary cylinder, and particularly a wide variety of printing operations as a printing machine of a relief printing and intaglio offset printing method. It is possible to intermittently stop the print stand relative to the fixed rotary cylinder halfway and perform a reciprocating sliding operation, and the rotary cylinder is independent at the time of the stop regardless of the printing speed. It can be idled at a desired rotation speed.Because the rotary cylinder has a transfer surface and a press pressure surface, the surface of the transfer ink film on the printing material can be smoothed at the same time as printing. Change the phase,
It is possible to change the printing direction by repeating the forward rotation and the reverse rotation, to perform overprinting, etc., and to exert a remarkable effect on special printing such as precision printing and quality improvement.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the printer of the present invention, FIG. 2 is a plan view of the printer of the embodiment of the present invention, and FIG. 3 is a front view of the printer of the embodiment of the present invention. FIG. 4 is a block diagram of a control system of the printing machine of the present invention, and FIG. 5 is an example of an operation system program set in the control system of the printing machine according to an embodiment of the present invention.

Claims (8)

[Claims] Claims: 1. A rotary cylinder, which is supported by a main body frame and rotates, and a printing rack, which is reciprocally movable, including a rack gear that meshes with a pinion gear of the cylinder. The printing rack has a printing plate and a cover. A printing machine comprising a printing body surface plate, and a transfer surface and a pressing surface provided on the peripheral surface of the rotating drum. 2. A rotary cylinder that is pivotally supported by a main body frame and rotates, and a rack gear that reciprocates with a rack gear that meshes with a pinion gear of the cylinder meshes at the same phase position with each other. 2. The printing machine according to claim 1, further comprising a retractable rack gear that can be released so that the rotary cylinder can idle at that position. 3. The rotary cylinder comprises a rubber blanket transfer surface in a predetermined section along the peripheral surface in the rotational phase direction, and a press surface made of a material such as metal or hard rubber in the other section. The printing press according to claims 1 and 2. 4. The rotating cylinder is configured so that it can idle at a position where a plate surface plate and / or a platen to be printed has passed through. The printing machine according to item 3. 5. A squeegee and a doctor, which are supported by a main body frame and which move up and down according to a predetermined control by an air cylinder toward the surface plate surface when passing through the plate surface plate, according to any one of claims 1 to 4. Printing machine. 6. A printing machine according to claim 1, wherein urethane ink wiping rollers are provided in front of and behind the rotary cylinder. 7. The printing machine according to claim 1, further comprising an air blower in the vicinity of the peripheral surface of the rotating drum. 8. The printing machine according to claim 1, wherein the printing plate is a letterpress or intaglio printing plate.