JP3590840B2 - Wiping device for intaglio printing press - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressing mechanism of a wiping device for wiping ink adhered to a non-image area on a printing plate in an intaglio printing press.
[0002]
[Prior art]
In the printing operation of a normal intaglio printing machine, the ink is transferred to the intaglio printing plate surface on the intaglio printing cylinder by an inking device, and the ink that has adhered to the intaglio printing plate surface except for the image is manually transferred by the operator to the intaglio printing plate surface. By pressing the eccentric bearing by moving it, the rotational force of the drive motor is transmitted to the gear fixed to one shaft end of the wiping roller via the pinion gear, and it contacts the intaglio cylinder, and After wiping with a wiping roller rotating in the opposite direction, the printing is performed by transferring the remaining image ink to paper passing between the intaglio cylinder and the impression cylinder.
[0003]
As an example of a wiping device of an intaglio printing press, there is Japanese Patent Application No. 2001-112624 (wiping device of an intaglio printing press) as shown in FIG. In the wiping device of the present invention, the wiping roller (2) is suspended, and the operation-side bearing (14a) and the driving-side bearing (14b) mounted on the left and right end shafts of the roller are attached to the openable metal cover (3). And a wiping roller support frame (5) capable of moving back and forth in the attaching / detaching direction by hydraulic pressure, and the wiping roller support frame (5) is horizontally moved in the pressing direction with respect to the intaglio cylinder (1). A guide rail (6) for movement, a bracket (8) for connecting the wiping roller support frame (5) and the wiping tank (7), and a hydraulic mechanism cylinder ( 9) A hydraulic mechanism piston unit (10) and a base incorporated on a holder capable of following up to a set pressure in the axial direction of the roller as the wiping roller changes. A plurality of cleaning members (not shown) on which a metal net is attached to a frame, and a flexible synthetic fiber scourer having an opening which does not hinder the removal of ink is placed thereon; A pressure gauge (12) for measuring a horizontal reaction force of a servomotor (13), an idle gear (18) and the hydraulic mechanism cylinder part (9). ) And a nut portion (16), a pressing adjustment mechanism for changing the position of the wiping roller (2), and a potentiometer (17) for measuring the moving distance of the wiping roller (2). A structure is provided with a control device (11) that can automatically perform pressure adjustment on the intaglio cylinder (1) at a preset value.
[0004]
According to the present invention, the printing of the wiping roller (2) can be performed stably by maintaining the pressing force at approximately 4 KN on the driving side and approximately 0.5 KN on the operating side, and the pressing force is controlled by the wiping roller (2). The horizontal reaction force received from the intaglio cylinder (1) is measured as a numerical value closer to reality, and the measured data is automatically adjusted by pressing through the control device (11) to greatly reduce the burden on the operator. This is what made it possible.
[0005]
However, since the pinion gear (39) is used to drive the wiping roller (2), a rotational moment acts on the wiping roller (2) due to the driving torque, so that there is a large difference between the left and right pressing forces.
[0006]
Further, a pressing device including a control device (11), a pressure gauge (12), a potentiometer (17), a servo motor (13), an idle gear (18), a linear motion mechanism screw portion (15), and a nut portion (16). An adjustment mechanism was required, and the device was complicated.
[0007]
FIG. 5 is a schematic plan view showing a method of transmitting the driving force of the conventional wiping roller (2). The driving force generated by the prime mover (38) is transmitted to the wiping roller (2) via the reduction gear (39), the pinion gear (40), and the wiping roller gear (41). In this method, when the wiping roller (2) is driven, a torque in the rotation direction acts on the wiping roller gear (41) by the driving side pinion gear (40). As a result, a force acts on the wiping roller gear (41) to move it away from the intaglio cylinder. Therefore, the driving-side bearing (14b) of the wiping roller (2) receives a strong force in a direction away from the wiping roller (2), and the operating-side bearing (14a) receives an acting force in the opposite direction with the driving-side bearing (14b) as a fulcrum. As a result, the left and right pressings become unbalanced, which causes the wiping roller (2) to wear unevenly.
[0008]
[Problems to be solved by the invention]
As described above, in the above-described conventional technique, since the pinion gear (39) is used to drive the wiping roller (2), a rotational moment acts on the wiping roller (2) due to the driving torque. There is a difference in the pressing force between the driving side and the operation side, and it is necessary to press the driving side strongly, which causes uneven wear of the wiping roller (2).
[0009]
In addition, since there is a difference in right and left pressing, at the time of starting printing, the control device (11) must be frequently adjusted by the influence of thermal expansion of the wiping roller (2). , Pressure gauge (12), potentiometer (17), servomotor (13), idle gear (18), linear motion screw (15), nut (16), etc. It became complicated, and workability such as refueling, waterproofing, and operation confirmation was poor, and it took time to learn the operation of the control device (11).
[0010]
An object of the present invention is to connect the wiping roller shaft and the drive shaft by a universal joint (43) that can be connected or disconnected so that the driving torque from the pinion gear (39) does not act on the wiping roller support frame (5). Thus, there is provided a wiping device for an intaglio printing press capable of removing imbalance of pressing and performing stable wiping so that pressing on the driving side and the operating side can be performed evenly.
[0011]
[Means for Solving the Problems]
A wiping device for an intaglio printing press according to the present invention includes a mechanism for suspending a wiping roller and fixing a bearing attached to a shaft end of the wiping roller with an openable / closable metal cover. A wiping roller support frame comprising a wiping roller support frame comprising a wiping roller capable of moving back and forth in the attaching and detaching direction by hydraulic pressure, and an intaglio printing of the wiping roller support frame. A guide rail for moving horizontally in the pressing direction with respect to the trunk, a bracket for connecting the wiping roller support frame and the wiping tank, a hydraulic mechanism cylinder unit and a hydraulic mechanism piston connected to the bracket and performing pressing A pressing mechanism composed of a wiping roller and a hydraulic control unit. A metal net is stretched over a base frame incorporated on a holder that can follow the set pressure in the axial direction of the base frame. It is characterized in that it has a plurality of cleaning members on which washers are mounted, and a universal joint mechanism that directly connects the wiping roller shaft and the wiping roller drive shaft.
[0012]
The pressing device of the wiping device of the intaglio printing press of the present invention presses the wiping roller against the intaglio cylinder with the hydraulic mechanism cylinder portion and the hydraulic mechanism piston portion, and guides against a change in pressing caused by thermal expansion or wear occurring during printing. The wiping roller supporting frame on the roller is movable so as to be able to advance and retreat, and the wiping roller always follows the intaglio cylinder with a preset hydraulic pressure.
[0013]
The pressing mechanism of the wiping device of the intaglio printing press of the present invention has a hydraulic mechanism cylinder portion and a hydraulic mechanism piston portion on both the left and right sides of the driving side and the operation side, and separates the wiping rollers with respect to the intaglio cylinder. And the pressing hydraulic pressure can be set separately for the left and right sides by a hydraulic control unit.
[0014]
Further, the universal joint mechanism of the wiping device of the intaglio printing press according to the present invention is characterized in that the wiping roller drive shaft and the wiping roller shaft are connected so as to be connected or disconnected.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a wiping device for an intaglio printing press according to the present invention will be described in detail with reference to the drawings.
(First Embodiment) FIG. 1 shows a front view of a wiping device of an intaglio printing press according to a first embodiment. To the left and right of the wiping tank (7), a detachable hydraulic cylinder (19) for quickly changing the distance between the wiping roller (2) and the intaglio cylinder (1), and the wiping roller (2) and the intaglio cylinder (1) gently. A control circuit for moving the two types of hydraulic cylinders, having two types of hydraulic cylinders, a pressing hydraulic cylinder (20) for contacting and holding the pressing force, and a piston portion of the pressing hydraulic cylinder (20) (21) is moved at a low speed, and a wiping roller (2) and an intaglio cylinder (1) are gently brought into contact with each other.
[0016]
The detachable hydraulic cylinder (19) has a piston end fixed to the wiping tank (7), and when ink is deposited on the intaglio printing plate surface, pressure oil is first applied to the detachable hydraulic cylinder (19). The hydraulic cylinder connecting frame (23) on which the piston part (22) of the hydraulic cylinder for insertion / removal (19) is extended, and the hydraulic cylinder (19) for detachment and the hydraulic cylinder for pressing (20) are placed, and the hydraulic cylinder for pressing ( 20), a bracket (24) fixed to the tip of the piston (21) of the pressing hydraulic cylinder (20), and the bracket is fixed and moves freely on a guide rail (6) above the wiping tank. A wiping roller support frame (5), and a wiping roller having a bearing fixed to the wiping roller support frame (5) by a metal cover (3). (2) and the finishing blade mechanism (4) fixed on the wiping roller support frame (5) are quickly moved until the connection frame (23) hits the stopper (25) fixed on the wiping tank (7). . Although the main part of the finishing blade mechanism (4) is not shown, the first moving mechanism capable of making the left and right light contact with the wiping roller evenly by the button input of the blade after the rotation of the wiping roller is a wiping roller. The second holding mechanism that can move in the direction, and can continue to apply a constant left and right uniform pressure to the wiping roller after a few seconds is activated, and maintains the contact between the wiping roller and the finishing blade by the constant pressure. It is a mechanism.
[0017]
Next, when the stopper (25) hits the piston (22) of the detachable hydraulic cylinder (19) and stops, the pressure in the detachable hydraulic cylinder (19) increases, and the pressure reaches the set value of the control valve. When it rises, the switching valve B (26) automatically changes the flow of the pressurized oil to the pressing hydraulic cylinder (20) and extends the piston portion (21) of the pressing hydraulic cylinder (20). Further, a bracket (24) to which the tip of the piston (21) of the pressing hydraulic cylinder (20) is fixed, a wiping roller support frame (5) to which the bracket (24) is fixed, and the wiping roller support A wiping roller (2) having a bearing fixed to a frame (5) by a metal cover (3) and a finishing blade mechanism (4) fixed to an upper portion of the wiping roller support frame (5) are connected to a flow control valve A (27). The wiping operation is performed at the speed set by the operator, and the pressing is performed at the optimum value for the wiping operation set by the operator.
[0018]
At this time, the speed at which the wiping roller is moved can be changed by the flow control valve A (27). Further, the pressure of the detachable hydraulic cylinder (19) is kept constant at the set value of the control valve (26). The wiping roller (2) can be manually attached and detached by manually operating the switching valve A (29) and the switching valve B (30) with the hydraulic control device (31).
[0019]
(Second Embodiment) FIG. 2 is a front view of a wiping device of an intaglio printing press according to a second embodiment. A hydraulic circuit that can instantaneously switch the flow rate and pressure of pressurized oil using a hydraulic cylinder with position detection for the pressing hydraulic cylinders (32) provided on the left and right sides of the wiping tank (7). The pressing operation performed by two pairs of hydraulic cylinders in the embodiment is performed by one pair of hydraulic cylinders.
[0020]
When the ink is deposited on the intaglio printing plate surface, the pressure oil automatically passes through the high-speed hydraulic circuit and quickly extends the piston portion (33) of the pressing hydraulic cylinder (32). At this time, the shaft end of the wiping roller (2) is fixed by the metal cover (3), and the wiping roller support frame () is movable on the guide rail (6) attached to the upper part of the wiping tank (7) so as to be able to move forward and backward. The piston (33) pushes the bracket (24) fixed to 5) to quickly bring the wiping roller (2) closer to the intaglio cylinder (1). When the piston portion (33) extends to a limit switch (34) attached to an arbitrary position of the hydraulic cylinder so as to output a signal immediately before the wiping roller (2) comes into contact with the intaglio cylinder (1), the limit is reached. A signal is sent from the switch (34) to the control device (31), pressure oil is sent to the low-speed side circuit by the switching valve C (35), and the piston portion (33) sets the optimum value of the wiping operation set by the operator. While the pressing is maintained, the piston (33) is extended at a low speed set by the flow control valve B (36), and the wiping roller (2) and the intaglio cylinder (1) are gently brought into contact with each other to perform printing.
[0021]
In this method, the distance between the wiping roller (2) and the intaglio cylinder (1) is measured in advance, the hydraulic circuit is switched by the limit switch (34) and the control device (31), and the hydraulic cylinder piston for pressing (33) In order to control the operation described above, a pair of hydraulic cylinders for pressing (32) are provided on the driving side and the operating side. The wiping roller (2) can be manually attached and detached by manually operating the switching valve C (35) and the switching valve D (37) by the hydraulic control device (31).
[0022]
FIG. 3 is a schematic plan view showing a method of transmitting the driving force of the wiping roller (2) of the wiping device of the intaglio printing press according to the present invention. Power is transmitted from the prime mover (38) to the speed reducer (39) by the transmission shaft (44), and the power reduced by the speed reducer (39) is transmitted to the flexible joint (41), and the universal joint fixed to the distal end. The rotation is transmitted to (43). The flexible joint (41) is rotatably fixed by a slide bearing (42) that can move in the horizontal direction, and follows the horizontal movement at the time of attaching / detaching the wiping roller (2) and adjusting the pressing.
[0023]
The wiping roller (2) is stroked in the axial direction of the wiping roller by a mechanically reciprocating lever (not shown) during printing, but the universal joint (43) has a degree of freedom to stroke while transmitting torque. Although it is necessary, for example, by using a universal joint disclosed in Japanese Patent Application Laid-Open No. 2001-254758, the problem can be solved by dispersing the stress of the torque transmission meshing portion and reliably preventing the breakage.
[0024]
【The invention's effect】
With the above configuration, the balance between the driving side and the driving side can be balanced as compared with the related art, and wiping can be performed with relatively light pressure compared to the related art. The burden of 1) is reduced. This makes it possible to reduce the wear of the wiping roller (2) and the intaglio surface, save labor, and reduce the size of the hydraulic cylinder.
[0025]
Further, by using only hydraulic oil having high industrial stability, the operator can operate a personal computer for adjusting the pressing of the wiping roller (2), the servo motor (13), the idle gear (18), and the linear motion mechanism screw. Work such as maintenance and inspection of the unit (15) is released. As a result, the learning time is shortened, and even a person who has no printing experience can easily operate the wiping device.
[Brief description of the drawings]
FIG. 1 is a front view of a wiping device of an intaglio printing press according to a first embodiment of the present invention.
FIG. 2 is a front view of a wiping device of an intaglio printing press according to a second embodiment of the present invention.
FIG. 3 is a plan view showing a method of transmitting a driving force of a wiping roller of the wiping device of the intaglio printing press according to the present invention.
FIG. 4 shows a front view of a conventional wiping device of an intaglio printing press.
FIG. 5 is a plan view showing a method of transmitting a driving force of a wiping roller of a wiping device of a conventional intaglio printing press.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 intaglio cylinder 2 wiping roller 3 metal cover 4 finishing blade mechanism 5 wiping roller support frame 6 guide rail 7 wiping tank 8 bracket 9 hydraulic mechanism cylinder section 10 hydraulic mechanism piston section 11 control section 12 pressure gauge 13 servo motor 14a operation side bearing 14b Driving side bearing 15 Linear motion screw mechanism screw part 16 Nut 17 Potentiometer 18 Idle gear 19 Hydraulic cylinder 20 for attachment and detachment Hydraulic cylinder 21 Piston part 22 Piston part 23 Hydraulic cylinder connection part 24 Bracket 25 Stopper 26 Control valve 27 Flow rate adjustment Valve A
28 Pump 29 Switching valve A
30 Switching valve B
31 control device 32 pressing hydraulic cylinder 33 piston part 34 limit switch 35 switching valve C
36 Flow control valve B
37 Switching valve D
38 motor 39 reduction gear 40 pinion gear 41 wiping roller gear 42 slide bearing 43 universal joint 44 transmission shaft

Claims (4)

In the wiping portion of the intaglio printing press, a guide rail fixed on the left and right frames of the wiping tank, and a left and right bearing mounted on the shaft end of the wiping roller, retreating forward and backward on the guide rail, facing the intaglio cylinder. A wiping support frame fixed by an openable metal cover, a mounting / dismounting hydraulic cylinder having a hydraulic piston end fixed to the wiping tank frame on both the driving side and the operating side of the wiping tank, and the mounting / dismounting hydraulic cylinder And a pressing mechanism having a hydraulic cylinder connection frame to which a pressing hydraulic cylinder is fixed, a stopper fixed to the wiping tank frame for limiting a stop position of the pressing mechanism, the wiping roller support frame, and the pressing hydraulic cylinder. A bracket fixed to the tip of the piston portion, and the mounting / dismounting hydraulic cylinder And controlling a switching valve in a hydraulic circuit of the pressing hydraulic cylinder to control the attaching / detaching hydraulic cylinder and the pressing hydraulic cylinder, and attaching / detaching the wiping roller by moving forward and backward with respect to the intaglio cylinder. Or a control device for pressing, a finishing blade mechanism which is capable of moving in the attaching / detaching direction so as to be able to move forward and backward in opposition to the wiping roller, and a wiping roller shaft and a wiping roller drive shaft located beside the wiping roller driving side bearing. A wiping device for an intaglio printing machine, comprising: In the wiping portion of the intaglio printing press, a guide rail fixed on the left and right frames of the wiping tank, and a left and right bearing mounted on the shaft end of the wiping roller, retreating forward and backward on the guide rail, facing the intaglio cylinder. A pressing mechanism having a wiping support frame fixed by an openable metal cover, and a hydraulic mechanism cylinder portion and a hydraulic mechanism piston portion for moving the wiping support frame back and forth on both the driving side and the operation side of the wiping tank. A control device that controls the pressing mechanism by controlling a switching valve in a hydraulic circuit of the hydraulic mechanism cylinder unit, a bracket fixed to a tip of the hydraulic mechanism piston unit and the wiping roller support frame, Attached on the wiping support frame, it can move forward and backward in the mounting / dismounting direction facing the wiping roller. The intaglio printing press comprising: a finishing blade mechanism that enables movement; and a universal joint mechanism that is located beside the wiping roller driving-side bearing and directly connects the wiping roller shaft and the wiping roller drive shaft. Wiping device. The pressing mechanism presses the wiping roller against the intaglio cylinder with the hydraulic mechanism cylinder and the hydraulic mechanism piston, and the wiping roller supporting frame on the guide rail is used to prevent a change in pressure due to thermal expansion or wear occurring during printing. 3. The wiping device for an intaglio printing press according to claim 1 or 2, wherein the wiping roller is moved movably forward and backward, and the wiping roller always follows the intaglio cylinder at a preset hydraulic pressure. The pressing mechanism has a hydraulic cylinder mechanism, a hydraulic circuit, a switching valve incorporated in the hydraulic circuit, and a control device on left and right frames on the driving side and the operation side of the wiping tank, and the switching valve is set by the control device. 4. The wiping device of an intaglio printing press according to claim 1, wherein the wiping roller is pressed at an optimum value for the wiping operation by controlling the wiping operation.

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