JPH0318587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching and detaching cylinders in a multifunction printing machine that continuously performs dry offset printing and intaglio printing, in which each cylinder is brought into contact with and separated from the cylinders in an orderly manner when starting and stopping printing operations. .

Dry offset printing involves supplying ink to the surface of a plate attached to a plate cylinder to form an image, transferring this image to a blanket cylinder that is in contact with the plate, and then using an impression cylinder that rotates in contact with the blanket cylinder to form an image. Printing is performed by transferring the image on the blanket cylinder to the held paper. Also,
Intaglio printing supplies ink to the concave image area and flat non-image area of an intaglio plate attached to an intaglio cylinder, and removes excess ink from the non-image area using a wiping roller that rotates in the opposite direction while facing the intaglio plate. After wiping off the ink, the ink in the concave image area is transferred to paper that is pressed against the intaglio plate and held by a rotating impression cylinder to perform printing.

In this way, since both dry offset printing and intaglio printing use impression cylinders of the same type and purpose, dry offset printing and intaglio printing can be performed on one machine by sharing one impression cylinder. Multifunction printers that allow continuous printing have been developed and are in use.

Generally, in printing operations, the printing cylinder and ink forming roller are brought into contact with each other in conjunction with the paper feeding operation at the start of printing, and when the machine is stopped, they are moved apart in conjunction with the stopping operation, so-called insertion and removal. It will be done. However, in a multifunction printing press, in addition to the impression cylinder, blanket cylinder, and intaglio cylinder, there are many cylinders that enter and exit the cylinder, such as a plate cylinder for dry offset and an inking roller for intaglio printing, and in addition, there are many cylinders that are inserted into and removed from the cylinder, such as a plate cylinder for dry offset, and an inking roller for intaglio printing. In order to maintain strength, these can be used for 3 times or 4 times where a large printing pressure is required.
Most printers have a double cylinder and print on three or four sheets of paper during one rotation of the cylinder, so it is necessary to insert and remove each cylinder in an orderly manner. If this goes out of order, an extremely large amount of pressure will be applied between each cylinder, which may cause the cylinder to curve and cause a major accident.

The present invention has been made in view of the above-mentioned points, and it is possible to construct a rubber cylinder of four times the diameter relative to the impression cylinder by making the lines connecting the axis of the rubber cylinder itself and the axis of the impression cylinder of four times the diameter substantially orthogonal to each other. and skillfully setting the order of the insertion of the intaglio cylinder and the impression cylinder, the insertion of the dry plate cylinder into the blanket cylinder, and the insertion of the inking roller into the dry plate cylinder, and the order of removal of each cylinder. By carefully setting the ink, it is possible to prevent overpressure on each cylinder and cylinder bearing, and to enable short-term insertion of the cylinder into the non-effective surface and removal of the cylinder after ink transfer to all effective surfaces is completed. The present invention provides a method for attaching and detaching a cylinder in a multifunction printing machine.
Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic side view of a multifunction printing press for explaining an embodiment of the cylinder attachment/detachment method according to the present invention, FIG. 2 is an enlarged side view of the printing section, and FIG. 3 is a front view of the timing regulating device. FIG. 4 is a side view, and FIG. 5 is a circuit diagram of the selection drive circuit. In the figure, paper is fed to the registration section by a feeder 1 and is transferred by a transfer cylinder 2 to an impression cylinder 3 which is a quadruple cylinder. On the other hand, the ink of each color supplied from the dry inker 4 to the dry plate cylinders 5a, 5b, 5c, and 5d is transferred onto the plate surface of the 4-fold blanket cylinder 6 by the dry plate cylinders 5a to 5d. Also,
From the concave inker 7 to the intaglio inking rollers 8x, 8y,
The ink supplied to each ink roller 8z is transferred onto the intaglio surface of the quadruple intaglio cylinder 9 by the inking rollers 8x to 8z. Note that 10 is a main electric motor for driving the printing press, and 11 is a wiping roller for wiping excess ink adhering to the surface of the intaglio cylinder 9. Further, each of the cylinders 3, 6, and 9 is arranged so that a line connecting the axes of the impression cylinder 3 and the blanket cylinder 6 and a line connecting the axes of the impression cylinder 6 and the intaglio cylinder 9 are substantially perpendicular to each other. ing.

Here, the paper wrapped around the impression cylinder 3 comes into contact with the plate of the blanket cylinder 6 during rotation, and offset printing is performed.
Next, it contacts the plate of the intaglio cylinder 9 to perform intaglio printing. The printed paper on which both sides have been printed is delivered to the chain 13 by the paper take-up cylinder 12, and then held in the claw rod of the chain 13 and conveyed to the delivery 14.
Here, the paper is discharged into a predetermined pile. In this case, since the impression cylinder 3, blanket cylinder 6, and intaglio cylinder 9, which are interlocked with each other, are quadruple cylinders, four sheets of paper are printed when each printing cylinder rotates once.

15a, 15b, 15c, and 15d are ink forming rollers for supplying ink of each color to the dry plate cylinders 5a, 5b, 5c, and 5d, respectively. Here, cylinder removal is performed in the direction of the arrow G between the impression cylinder 3 and the blanket cylinder 6, and in the direction of the arrow G between the intaglio cylinder 9 and the impression cylinder 3, respectively. In addition, the rubber cylinder 6 and the dry plate cylinders 5a, 5b, 5
c and 5d, in the direction of arrows A, B, C, and D, and the dry plate cylinders 5a, 5b, 5c, and 5d and the ink roller 1.
Between each of 5a, 15b, 15c, and 15d is an arrow a,
Body removal is performed in directions b, c, and d, respectively.
Further, the blanking is performed between the intaglio cylinder 9 and the inking rollers 8x, 8y, and 8z in the directions of arrows X, Y, and Z, respectively. Needless to say, the body insertion is performed in the direction opposite to these arrow directions. The order of inserting and removing the barrel will be explained in detail later.

Next, the structure and operation of the timing regulating device for inserting and removing the shell will be explained in detail with reference to FIGS. 3 to 5. In these figures, 20 is a drive shaft of the impression cylinder 3, which is a quadruple cylinder, and this drive shaft 20 has a
A disc 22 having a proximate body 21 as a detection body slightly apart in the axial direction, and a plurality of proximate bodies 23 _G , 23 as detection bodies arranged at predetermined angular positions.
Discs 24 having disks 23c, _23A , _23Dac , _23B , 23d, 23b and _23I are respectively fixed. On the other hand, four proximity switches 25a, 25b, 25c, and 25d as detection switches are arranged at 90° intervals on the outside of the rotational orbit of the proximity body 21. They are fixed to the substrate 26 by support columns 27a, 27b, 27c, and 27d, respectively. Also, proximal body 2
On the outside of the rotating orbits of 3 _G to 23 _I , there are four proximity switches 28a, 2 as detection switches at 90° intervals.
8b, 28c, 28d are arranged, and the rotating board 26
They are each fixed at a predetermined angular position apart from the proximity switches 25a to 25d by struts 29a, 29b, 29c, and 29d.

A gear 31 fixed to the output shaft of a servo motor 30 is engaged with teeth formed on the outer periphery of the rotating base plate 26 . In addition, in FIG. 4, 32 is a bearing of the drive shaft 20. Only one set of proximity switches and struts is shown in FIG. Here, the reason why four proximity switches 25a to 25d and 28a to 28d are provided is that the drive shaft 20 is a quadruple cylinder shaft, and 1/4 rotation of the drive shaft 20 is 1/4 rotation of the printing rotation. Corresponds to rotation. Therefore, if n-times proximity objects are fixed to the trunk shaft, n proximity switches are required.

In such a configuration, when the drive shaft 20 rotates in the direction of the arrow, the proximity switches 25a to 25d
outputs a selection signal at the timing when the proximate object 21 approaches and passes. Similarly, the proximity switches 28a to 28d sequentially output timing signals at the timing when the nearby objects _23G to _23I approach and pass. Now, in the state shown in the figure, if a body insertion command signal is issued, a selection signal for the proximity switch 25a is output as the proximity object 21 passes, and this selection signal selects the proximity switch 28a by the operation of the selection circuit described later. and the proximate body 23 _G ~ 23 _I
As a result of the passage of the timing signals, timing signals for inserting the body are sequentially outputted from the proximity switch 28a. This timing signal is output at accurate timing according to the angular positions of the proximate objects 23 _G to 23 _I. In addition, it is also possible to support the proximal bodies 23 _G to 23 _I so as to be movable in the circumferential direction with respect to the disk 24, so that the timing of each insertion can be finely adjusted.

In addition, normally, when the rotational speed of the printing press changes, it is necessary to shift the timing of cylinder insertion and cylinder removal due to delays in the hydraulic system, etc.; If the rotating board 26 is rotated by the rotation of the servo motor 30, the relative angular position of the proximity switch with respect to the nearby object will be changed, and timing deviations due to changes in the rotational speed of the printing press will be avoided. can be corrected.

In FIGS. 3 and 4, the timing generating device for inserting the body has been explained, but the timing generating device for removing the body has the same structure and operation, except for the order and angular position of the proximal bodies 23 _G to 23 _I. .

FIG. 5 is a circuit diagram of the selection drive circuit. When paper is accurately fed from the feeder to the front of the registration section, a body insertion command signal is output, and this signal causes relay S to be activated.
operates and relay contacts S ₁ , S ₂ , and S ₃ turn on. When relay contact S ₁ is turned on, the operation of relay S is self-maintained, and when relay contact S ₂ is turned on, proximity switch 2 is activated.
A DC voltage which has been rectified by the rectifier REC and then smoothed by the capacitor CON is applied to the circuits 5a to 25d, and when the relay contact _S3 is turned on, the timing signal output from the proximity switches 28a to 28d is activated. The amplifying transistor circuit is turned on. As shown in FIG. 3, when the proximity object 21 approaches the proximity switch 25a and passes through, the proximity switch 25a outputs an "L" level selection signal, and this output operates the relay A ₀ to close the relay contact. a ₁ , a ₂ turn on, relay contact
_A3 and _A4 are off. The operation of relay _A0 is self-maintained by turning on relay contact _a1 , and relay contact _a2
By turning on the proximity switch 28a, the proximity switch 28a is selected and a voltage is applied. In addition, when relay contact _a3 is turned off, the circuit of proximity switch 25b is cut off, and relay contact
When _a4 is turned off, the circuits of proximity switches 25c and 25d are cut off. On the other hand, the selection signal from the proximity switch 25a also operates the relay E at the same time, turning on the relay contact e. When relay contact e turns on, relay F operates, relay contact _f1 turns on, and relay F
The operation is self-maintained. In addition, relays A ₀ , E
Diodes D ₂ , D ₃ , and D ₄ are connected so that relays B ₀ , C ₀ , and D ₀ do not operate simultaneously when the relays B 0 , C 0 , and D 0 operate. Similarly, diode D ₁ is connected so that relay A ₀ does not operate when other relays operate. Note that b ₁ to _{b 4} are relays B ₀ , C ₁ to _{C 4}
is a relay C ₀ , and d ₁ to _{d 4} are relay contacts respectively operated by a relay D ₀ .

Also, depending on the operation of relay F, relay contacts f ₂ to _{f 9}
are set to switch respectively. The g, h, i, j, k, l, m, and n points of the relay contacts f ₂ to f ₉ are the relay contacts w ₁ , x ₁ , y ₁ of the relays W, X, Y, and Z,
Connected to points g, h, i, j, k, l, m, and n of z ₁ , respectively. Therefore, after the relay F is operated, the proximity switches 25a to 25d are switched to the circuit of the relays W, X, Y, and Z used during the body removal operation, and wait for the next body removal operation.

Proximity switch 28 is activated by turning on relay contact _a2 .
When a voltage is applied to a, as shown in FIG. 3, when the proximate objects 23 _G to 23 _I approach and pass the proximal switch 28 a, "L" level timing signals are sequentially output, and this output The transistor circuit becomes conductive and the electromagnetic rotor MR operates. Note that diodes D ₅ to _{D 8} are connected to proximity switch 2.
The outputs of 8a to 28d are connected so that they do not affect each other. The electromagnetic rotor MR has two step switches, and each switch has a fixed contact.
mr ₁₀ to _{mr 19} and mr ₂₀ to _{mr 29} are sequentially turned on one step at a time each time a timing signal is input to the electromagnetic rotor MR. Proximate body 23 The electromagnetic rotor MR is operated by the timing signal from _G , and the fixed contact is
When mr ₁₁ turns on, current flows through relay P ₁ , which turns on relay contact p ₁ . The operation of relay _P1 is self-maintained by turning on relay contact _p1 . Then, due to the operation of relay P ₁ , an output circuit (not shown) operates and the hydraulic cylinder works, causing the blanket cylinder 6 to enter G (in the opposite direction to the arrow) as shown in FIG.
is increasingly being done. Next, the proximal body 23
Fixed contact mr ₁₂ by timing signal by c
turns on, relay _P2 operates, relay contact _p2 turns on, and relay contact _p21 turns off. relay contact p ₂
When relay _P2 is turned on, the operation of relay P2 is self-maintained, and when relay contact _p21 is turned off, relay _P1 is restored.
Then, the body insertion C is performed by the operation of the relay _P2 . Hereinafter, depending on the subsequent timing signal,
Relays P ₃ to _{P 8} operate in sequence, thereby causing the body to engage at a predetermined timing, which will be described later. Then, when relay Q is activated by the first signal generated by the next rotation of the nearby object and relay contact _q1 is switched, the diode
Since the pulsating current half-wave rectified by _D9 flows to the electromagnetic rotor MR, the switch operates in steps and the fixed contact
When mr ₁₀ and mr ₂₀ are turned on, they are stopped and reset to the initial state. Relay contacts q ₂ and q ₃ are turned off by the operation of relay Q, but relay P ₈ is restored when relay contact q ₂ is turned off, and relay S is restored when relay contact q ₃ is turned off. When relay S returns, relay contact _S2 turns off, so proximity switch 25a
No voltage is applied to the circuit 25d, the first insertion operation is completed, and the relay A ₀ returns to its original state. However, if the thrust command signal is continuously output, relay Q operates for a short time (determined by the time constant of resistor R ₁ and capacitor C ₁ ), so relay contact q ₃ turns on immediately and the proximity switch is activated. 25a-2
Voltage is applied to the circuit 5d again. and,
Next, the proximity switch 25b outputs a selection signal by the proximity body 21, so that the relay _B0 is operated and the proximity switch 28b is selected. below,
The operation is the same.

On the other hand, in the case of body removal, when a relay (not shown) is activated by the body insertion command signal and relay contact r is turned on, voltage is applied to the circuit of relays W, X, Y, and Z. Therefore, the proximity switches 25a to 25d
Relays W to Z are each operated in accordance with a selection signal from , and each relay contact is operated. In addition, w ₃ , w ₄ ,
x ₃ , x ₄ , y ₃ , y ₄ , z ₃ , z ₄ are relays W,
These are X, Y, and Z relay contacts. The operation of the circuit is exactly the same as when entering the body.

The order of insertion and removal performed by the timing regulating device configured and operated as described above will be explained. First, before printing starts or if the machine is stopped due to paper feeding failure, etc., the impression cylinder 3, blanket cylinder 6, intaglio cylinder 9, dry plate cylinders 5a to 5d, ink forming rollers 15a to 15d, and inkling for the intaglio plate are applied. roller 8x,
8y and 8z are spaced apart from each other and are in an open state. Therefore, when the main motor 10 is started and the first sheet of paper reaches a predetermined position, a signal is generated, the timing regulating device is operated, and the insertion is performed. The order of loading is that first the blanket cylinder 6 moves in the opposite direction of arrow G and is loaded onto the impression cylinder 3, and then the four dry plate cylinders 5
The dry plate cylinders 5a to 5d move in the opposite direction of the arrows A to D and are inserted into the blanket cylinder 6, and the order in which the dry plate cylinders 5a to 5d are inserted is set as follows. That is, among the central angles formed by the contact points of each dry plate cylinder 5a to 5d with the blanket cylinder and the contact points of the blanket cylinder 6 and impression cylinder 3, the central angle θ on the blanket cylinder rotation discharge side satisfies 0°≦θ<
When 90°, θ; when 90°≦θ＜180°, θ−90°;
When 180°≦θ, the angle is set to θ−180°, and the angle is inserted into the body in ascending order. In the example, Θ ₃ < Θ ₁ < Θ ₄ <
Since Θ ₂ , the dry plate cylinders are inserted in the order of C-A-D-B as indicated by the arrows. Incidentally, the shift in the insertion phase is set so that A lags C by four times the difference in center angles, such as 4 (Θ ₁ - Θ ₃ ). After the dry plate cylinders 5a to 5d are loaded, the ink forming rollers 15a to 15d are loaded in the order of arrows c-a-d-b in accordance with the order. Note that the ink forming rollers 15a and 15c are inserted simultaneously with the dry plate cylinder 5d, and as shown by the above symbols, the ink forming rollers 15a and 15c are inserted in the order of C-A-D, c, and a-B-d-b. be done. Next, the three inking rollers 8x to 8z move in the opposite direction of the arrows X, Y, and Z and are inserted into the intaglio cylinder 9, and the order of this insertion is set as follows. That is, each inking roller 8x, 8y, 8
Of the central angles formed by the contact point of z to the intaglio cylinder 9 and the contact points of the intaglio cylinder 9 and the impression cylinder 3, the central angle δ on the discharge side in the rotational direction of the intaglio cylinder 9 satisfies 0°≦δ<90°. When is δ,
When 90°≦δ<180°, the angle is set to δ-90°, and when 180°≦δ, the angle is set to δ-180°. In the case of the embodiment, since δ ₂ < δ ₃ < δ ₁ , the inking rollers 8x to 8z are YZ-
It is inserted into the body in the order of X. In addition, the shift in the phase of insertion is
Z is set to lag behind Y by four times the difference in central angles, such as 4(δ ₃ −δ ₂ ). Finally, the impression cylinder 3 is inserted into the intaglio cylinder 9, thereby completing the insertion.

Next, when printing is completed or the machine is stopped due to paper feeding failure, etc., the timing regulating device is activated and the cylinder is removed. As for the order of removing the drums, first, the ink forming rollers 15a to 15d are removed from the dry plate cylinders 5a to 5d, and then each of the dry plate cylinders 5a to 5d is removed in order from the upstream side in the direction of rotation of the blanket cylinder 3. Ru. In this case, each dry plate cylinder 5a~
5d is removed from the body at a position past the effective surface on which the plate is attached. Then, after the point on the blanket cylinder 6 that is in contact with the end of the effective surface of the dry plate cylinder 5d on the most downstream side comes into contact with the impression cylinder 3, the blanket cylinder 6 and the impression cylinder 3 are removed. Thereafter, the inking rollers 8x to 8z are sequentially removed from the rotational upstream side of the intaglio cylinder 9, and finally the impression cylinder 3 is removed from the intaglio cylinder 9.
The body removal is completed by removing the body from the body.

As is clear from the above explanation, according to the present invention, in the method for attaching and detaching a cylinder in a multifunction printing press,
The lines connecting the axes of the 4x diameter impression cylinders are made almost orthogonal to each other, and the 4x diameter blanket cylinder faces this, and the impression cylinder is inserted into the impression cylinder, and the dry plate cylinder is connected to the blanket cylinder. the order of insertion, insertion of the inking roller into the dry plate cylinder, and insertion of the inking roller into the intaglio cylinder;
In addition, by skillfully setting the order in which the shells are removed, the pressure will not be biased during the insertion and removal of the shell and the other shell will not become overpressured, so accidents such as curvature of the shell can be prevented. . In addition, the ink is transferred from the beginning of the effective surface after the insertion is completed within the non-effective surface, and the ink that should be transferred to the paper is transferred to the entire effective surface before the paper is removed. The quality of printed matter is improved because there is no ink shading in the middle of the pattern, and since the printing is done in the order of earliest timing, the time from the command to start printing to the completion of printing on all cylinders is minimized. This reduces the amount of waste paper generated.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a multifunction printing machine for explaining an embodiment of a method for attaching and removing a cylinder in a multifunction printing machine according to the present invention, Fig. 2 is an enlarged side view of the printing section, and Fig. 3 is the same. FIG. 4 is a front view of the timing regulating device, FIG. 4 is a side view, and FIG. 5 is a circuit diagram of the selection drive circuit. 3... Impression cylinder, 5a, 5b, 5c, 5d... Dry plate cylinder, 6... Rubber cylinder, 8x, 8y, 8z... Inking roller, 9... Intaglio cylinder, 15a, 15b, 15
c, 15d... Ink forming roller.

Claims (1)

[Claims] 1. Insert a 4x diameter rubber cylinder on a line substantially perpendicular to the line connecting the axes of the 4x diameter impression cylinder and the intaglio cylinder into the impression cylinder, and arrange them in parallel in the circumferential direction of the blanket cylinder. When the central angle θ of the blanket cylinder rotation and discharge side formed by the contact point of multiple dry plate cylinders to the blanket cylinder and the contact point of the blanket cylinder and impression cylinder is 0°≦θ<90°, θ, 90° When ≦θ<180°, the angle is set to θ-90°, and when 180°≦θ, the angle is set to θ-180°, and then the ink forming roller corresponding to each dry plate cylinder is inserted into the cylinder, and then After that, a plurality of intaglio inking rollers are arranged in parallel in the circumferential direction of the intaglio cylinder, and the intaglio cylinder rotation discharge side center angle δ between the contact point with the intaglio cylinder and the contact point of the intaglio cylinder and the impression cylinder is
When 0°≦δ<90°, δ, when 90°≦δ<180°, δ−90°, and when 180°≦δ, δ−180°. The impression cylinder is inserted into the cylinder in this order, and
After the ink forming roller is removed, the dry plate cylinder is removed in order from the upstream side of the blanket cylinder rotation at positions past the effective surface, and the point on the blanket cylinder that is in contact with the end of the effective surface of the dry plate cylinder on the most downstream side is A method for attaching and detaching a cylinder in a multifunction printing press, characterized in that the blanket cylinder is removed from the impression cylinder after contact with the impression cylinder, and finally the impression cylinder is removed from the intaglio cylinder.