JPH03205152A - Water supply device of printer - Google Patents

Abstract

PURPOSE:To prevent damage from being inflicted to the surface of a roller or ink from being transferred to the roller due to a slip caused by erroneous operation by providing a circuit for driving the second attachment/detachment device so that a watering roller becomes attached in position after the lapse of a specified time following the attachment of a quantity adjustment roller. CONSTITUTION:During printing process, a selection switch SS1 and another selection switch SS2 which are mutually interlocked are turned ON to a high level. If a main printer system turns under this state, a rotary relay on the system becomes activated, resulting in the turning ON of relay contacts r01, r02 and the turning OFF of relay contact r02. Then if a switch S is turned ON, a relay R1 for water supply becomes activated and the relay contact r1 becomes turned ON. At the same time, a water supply pump 25 becomes activated and thereby water is supplied to a water vessel 8. Next if a push button switch A1 for driving a water fountain roller is turned ON by depression, a relay R2 for driving a water fountain roller becomes activated to drive a motor 10 and in turn, drives a water fountain roller 5 by rotation as the relay contact r1 remains in 'ON' position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water supply device for a printing press that supplies ink and dampening water to a plate cylinder for printing.

[Conventional technology]

A non-image area treated with hydrophilic treatment and an image area (from the printed image) treated with water-repellent treatment are formed on the plate surface of the plate cylinder, and ink and dampening water are supplied to the plate surface to form ink and image lines. Attach it only to the
Printing machines that perform printing by transferring this ink onto printing paper are known.

FIG. 1 is a block diagram of a water supply device for such a printing press.

In the figure, an ink forming roller 2 and a wet roller 3 are brought into contact with the plate surface of a plate cylinder 1 rotating in eight directions, and these rollers are constructed so that they can be attached and detached against plate collapse. ing. Shake the ink from an ink fountain (not shown) using a roller 4.
The ink is supplied to the ink forming roller 2 via a group of rollers including 1
In addition, the dampening water is supplied from the water source roller 5 to the swimsuit roller 3 via a metering roller 6 and a transfer roller 7. The water base roller 5 is immersed in water stored in the water boat 8, and the transmission mechanism 9
It is designed to be driven separately from the printing machine by a motor 10 (driving means) via a motor.

Each roller is designed to rotate in the directions of arrows B, C, D, and E, but the rotation directions of the contact surfaces of the metering roller 6 and transfer roller 7 are opposite to each other in order to transfer the water smoothly. It has become.

FIG. 2 is a configuration diagram of the attachment/detachment device for the water supply roller group. In the figure, a pin shaft 13 is fixed to the tip of a lever 12 that is rotatably provided with respect to the rotating shaft 11 of the transfer roller 7, and a lever 14 is rotatably provided on this pin shaft 13. The rotation shaft 1 of the swimsuit roller 3 is attached to one end of the lever 14.
5 is rotatably supported. Projection part 1 of lever 12
A spring 16 is interposed between the protruding portion 14a of the lever 14 and the protruding portion 14a of the lever 14 to urge the protruding portions away from each other. The force of this spring 16 causes the swimsuit roller 3 to
is placed on the transfer roller 7. And lever 14
The piston rod of cylinder 1γ is connected to.

The figure shows a state in which the piston rod is extended and the swimsuit roller 3 is attached to the plate cylinder 1. Here, when the cylinder 17 operates and the piston rod is retracted, the levers 12 and 14 are rotated together in the clockwise direction in the figure around the support shaft 11, and the swimsuit roller 3 is separated from the plate cylinder 1 and is in the detached state. become. After rotating to a certain extent, the leper 12 hits the stop pin 18 and stops, so the leper 14 rotates around the pin shaft 13 against the spring 16, and the swimsuit roller 3 is further removed from the transfer roller 7. Leave.

When the cylinder 17 operates and the piston rod extends, the operation occurs in the reverse order as described above, and the swimsuit roller 3 is brought into contact with the plate cylinder 1.

That is, the rotating shaft 11 of the transfer roller 1, the lever 12, the bottle shaft 13, the lever 14, and the protrusion 14a of this lever 14.
1. The rotating shaft 15, spring 16, cylinder 17, stop bin 18, etc. of the swimsuit roller 3 constitute means (second attachment/detachment means) for attaching or detaching the contact state between the swimsuit roller 3 and the plate cylinder 1. There is.

On the other hand, a lever shaft 21 rotatably supported on a frame or the like by a support shaft 20 rotatably supports a rotating shaft 22 of the metering roller 6 eccentrically therefrom. A piston rod of a cylinder 23 is connected to this lever shaft 21. In addition, 24 is the rotation axis of the water head roller 5, and the rotation axis 22
and 24 are maintained at a constant interval, so that the water base roller 5 and metering roller 6 are always in contact with each other with a predetermined pressure and are in a state of contact. The figure shows a state in which the piston rod has shrunk and the metering roller 6 has reached the transfer roller 7. here,
When the cylinder 23 operates and the piston rod extends, the lever shaft 21 rotates, and as a result of this rotation, the eccentric metering roller 6 separates from the transfer roller T and becomes detached. When the cylinder 23 operates and the piston rod is contracted, the metering roller 6 is transferred to the transfer roller 7 again.

That is, the means (first (attachment/detachment means) is configured.

In addition, 25 is a water supply pump (
water supply means).

[Problem to be solved by the invention]

In the water supply device having such a configuration, various problems occur if the water source row 25 is rotated and the swimsuit roller 3 and metering roller 6 are arbitrarily attached and detached.

In other words, when the water base roller rotates when there is no water in the water tank, there will be no water film on the contact surface between the water base roller and the metering roller, and the coefficient of friction between them will become very small. Slips also damage the elastic surface of the metering roller. 1. If there is no water film on the surface of the metering roller, if you transfer the metering roller and bring it into contact with the roller, the surface of the metering roller will be damaged as well because the contact surfaces of these rollers are rotating in opposite directions. be done. Furthermore, a large load is placed on the motor that drives the water head roller, resulting in burnout of the motor. 1.
If the swimsuit roller touches the plate cylinder when there is no water film on the surface of the transfer roller, ink from the plate will adhere to the swimsuit roller, and after this ink has been transferred to the transfer roller, it will adhere to the metering roller, causing adjustment problems. This may stain the rollers or cause large friction in the slip area in the opposite direction.

The present invention has been made in view of the above points, and its purpose is to perform V-drive under certain conditions for rotation of the water base roller and attachment/detachment of the metering roller and swimsuit roller. An object of the present invention is to provide a water supply device for a printing press that prevents damage to various parts.

[Means to solve the problem]

A water fountain roller, a part of which is disposed inside the water boat, a water supply means for supplying water to the water boat, a driving means for rotationally driving the water fountain roller, and a metering meter that contacts the water fountain roller. Laura and
A transfer roller that rotates in the opposite direction to this metering roller and comes into contact with it, a swimsuit roller that comes into contact with this transfer roller, a plate cylinder that comes into contact with this swimsuit roller, and the state of contact between the metering roller and the transfer roller can be changed between attachment and detachment. A first attachment/detachment means that sets the contact state between the swimsuit roller and the plate cylinder after the swimsuit roller and the transfer roller come into contact during the loading operation, and after the swimsuit roller and the plate cylinder are separated during the unloading operation. A water supply device for a printing press, comprising a second attachment/detachment means that operates to remove the contact state between the swimsuit roller and the transfer roller, and supplies water from the water boat to the plate cylinder while the rollers are in contact with each other. A circuit for operating a drive means for rotating the water base roller under conditions in which the water supply means is operated and water is present in the water tank, and a circuit for operating a drive means for rotating the water base roller under the condition that the water supply means is operated and there is water in the water tank, and a circuit for operating the driving means to rotate the water base roller under the condition that the water supply means is operated and water is present in the water tank, and after a predetermined time has elapsed since the water base roller has rotated and the plate cylinder is rotated. A circuit for driving the first attachment/detachment means so as to set the metering roller to the swimsuit roller under the condition that the machine is rotating, and a circuit for driving the first attachment/detachment means to set the swimsuit roller to the swimsuit roller after a predetermined period of time has elapsed after the metering roller has worn the swimsuit roller. A circuit for driving the second attachment/detachment means is provided.

[Effect]

When the metering roller and the transfer roller come into contact, there is always water in the metering roller because a predetermined period of time has passed since the water base roller rotated with water in the water tank. 1. When the bathing roller and the plate cylinder come into contact, a predetermined amount of time has passed since the metering roller and transfer roller have touched each other.
There must be water on the swimsuit roller.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 3 is a circuit diagram of an embodiment of a water supply device for a printing press according to the present invention.

During printing work, VC is connected to Select Suinochi S.
Turn on SI and SS2 as shown in the figure. In this state, when the main unit of the printing machine such as the plate cylinder rotates, the main unit rotation relay (not shown) operates, and its relay contact roI
l r03 turns on and relay contact ro2 turns off. When the switch S is turned on, the water supply relay R1 is operated, and the relay contact rl is turned on, and this operation causes the water supply pump 25 shown in FIG. 2 to operate and water is supplied to the water boat 8.

Next (then, when you press the pushbutton switch A1 for driving the water head roller to turn it on, relay contact r1 is on, so relay R2 for driving the water head roller operates, and relay contact r2
1 + r22 turns on and relay contact r23 turns off.

When the relay contact r21 is turned on, the operation of the relay R2 is self-maintained, and the operation of the relay R2 causes the motor 10 shown in FIG. 1 to rotate and the water head roller 5 to be rotationally driven. When the water head roller drive stop push button switch B is pressed to turn it off, the self-holding of the relay R2 is released and the rotation of the water head roller is stopped.

1, timer relay Tl is turned on by turning on relay contact r22.
operates, and the t-th timer contact, tl2, turns on after a certain period of time. This timer time is set to a length sufficient for the water source roller to rotate and for the water to rise at the metering roller 1.

When timer contact tl+ is turned on, relay contact r01 has already been turned on.
is on, relay R3 attached to the metering roller operates, and relay contacts r31 1 r32 are turned on. This operation of relay R3 causes cylinder 23 in FIG. 2 to operate, and metering roller 6 is brought into contact with transfer roller 7.

When relay contact r32 is turned on, timer relay T2 operates, and timer contact t2 is turned on after a certain period of time. This timer period is set long enough for the metering roller to rotate and transfer the water to the transfer roller 7. Now, press the push button switch A3 for wearing swimsuit rollers to turn it on.
Since the relay contact r03 is on and the timer contact t2 is also on, the swimsuit roller wearing relay R4 is activated and the relay contact r4 is turned on. Relay R is turned on by turning on relay contact r4.
Operation 4 is self-maintained. Due to this operation of R4, the second
The cylinder 17 shown in the figure operates and the swimsuit roller 3 is placed on the plate cylinder 1. In addition, there is a push button switch B3 for removing the swimsuit roller.
When it is turned off by pressing , the self-holding of the relay R4 is released and the swimsuit roller 3 is released from the plate cylinder 1.

Thus, during printing operations, the relationship between the operation of the water supply device and the conditions under which the operation is performed is as shown in Table 1 below.

? Fu..., ○ mark indicates that the condition is satisfied. If even one of these conditions is missing, the operation will not be performed.

Next, when adjusting the two-tub pressure between each roller, the select switches SS1 and SS2 are switched to the lower position in the figure and turned on. In this state, when the switch S is turned on, the relay Rl operates to supply water to the water boat, and at the same time, the relay contact r1 is turned on.

Next, when pushbutton switch A1 is turned on, relay R2 is turned on.
operates, the water head roller rotates, and at the same time relay contact r2
1+r2■ turns on. Relay contact r21? When the relay R2 is turned on, the relay R2 is self-held, and when the relay contact r22 is turned on, the timer relay T1 is operated, and after a certain period of time, the timer contact tII+j+2 is turned on.

Here, when push button switch A2 for mounting the metering roller is pressed to turn it on, timer contact tl2 is on, so relay R3 operates and the metering roller is not worn, and at the same time relay contacts r31 + r3■ are turned on. do.

In this case, when relay R2 does not operate, timer relay T does not operate, and the water head roller has stopped, and the machine has stopped rotating, relay contacts r02 + r23
Since both are turned on, relay R3 operates even if timer relay T1 is inactive and timer contact tl2 is off. When relay r31 is turned on, the operation of relay R3 is self-maintained. In addition, push button switch B for removing the metering roller
When 2 is pressed to turn it off, the self-holding of relay R3 is released and the metering roller is removed from the transfer roller.

When push button switch A3 is turned on at any time, relay R is activated and the swimsuit roller is attached to the plate cylinder.At the same time, relay contact r4 is turned on and the operation of relay R4 is self-maintained. Ru.

Thus, during adjustment work, the operation of the water supply device and the conditions under which the operation is performed are as follows: If even one of these conditions is missing, the operation will not be performed.

Note that the above-mentioned two-pressure pressure refers to the contact pressure between two rollers that come into contact with each other in each roller, such as the swimsuit roller 3, transfer roller 7, metering roller 6, and water head roller 5. It is. This adjustment of the pressure is carried out, for example, in the following manner.

(a) While the two rollers in contact with each other are in a stopped state, a predetermined amount of ink is applied to the contact surface between the rollers in the released state. Next, when these two rollers are brought into contact, the ink spreads over the contact surfaces. Then, the two rollers are released and the area of the ink spread on the contact surface is detected to detect and adjust the two-push pressure. Hereinafter, this will be referred to as the roller stop adjustment method.

佽) A method of detecting and adjusting the nib pressure by visually checking the state of the liquid film formed on the roller surface by water supplied from the water boat 8 while rotating two rollers that are in contact with each other. . Hereinafter, this will be referred to as the roller rotation adjustment method.

? The two adjustment methods will be explained with reference to the operations during adjustment work.

When adjusting the pressure between the metering roller 6 and transfer roller γ by clicking the roller stop adjustment method, make sure that the water base roller 25, which is in constant contact with the metering roller 6, is stopped and that the transfer roller The condition is that 7 is not rotationally driven by the rotation of the plate cylinder 1, in other words, that the machine is stopped. That is, when the button in Fig. 3 is pressed, the select switch SS1 is turned on in the lower position, and the timer contact t1 is turned off.
Since the water head roller driving relay R2 is inoperative, the relay contact r23 of the water head roller driving relay R2 is turned on, and because the machine is stopped, the relay contact r23 is turned on. It becomes 2 paon,
Only when the condition that relay contact r23 is on is met, the first switch is turned on by turning on pushbutton switch A2.
The attachment/detachment means is driven and the metering roller 6 is attached.

On the other hand, in the roller rotation adjustment method, when adjusting the nip pressure between the rotating metering roller 6 and the transfer roller γ, water is applied to the metering roller 26 by the water base roller 5. It is necessary that the metering roller 6 be turned off only after a sufficient amount of water has been supplied, in other words, that the metering roller 6 be turned on only after a predetermined period of time when the water base roller 5 rotates under the condition that there is water in the water bucket 8. If this condition is not met and the metering roller 6 and transfer roller γ, which rotate in opposite directions to each other, become stuck, both rollers will be damaged as described above.

That is, if water is supplied to the water boat 8 and the water head roller 5 rotates for a predetermined time, the timer contact t1, which is turned on, is turned on, and the push button switch A2 is turned on. The attachment/detachment means is driven and the metering roller 6 is attached. At this time, the water head roller 5 is being driven, so the relay contact ``23'' is turned off and the button is turned off. As a result, rollers that do not have a water film on their surfaces do not rotate in contact with each other, which has the excellent effect of preventing damage to the roller surface due to slippage caused by operational errors and accidents such as transfer of ink to the rollers. be.

[Brief explanation of drawings]

Figure 1 shows the water supply system for a printing press that uses ink and dampening water.
Figure 2 shows the structure of the attachment/detachment device for the water supply roller group, Figure 3
The figure is a circuit diagram of an embodiment of a water supply device for a printing press according to the present invention. 1... Plate cylinder, 2... Ink forming roller, 3...
... Swimsuit roller, 5... Mizumoto roller, 6...
Measuring roller, γ...Transfer roller, 8●●●・Mizifune,
10●●●●Motor, 1γ, 23●●●●Nlinda, 2
5●●●●Water supply pump, SS1, SS2●...Select switch, Rl...Water supply relay R2...
... Water head roller drive relay R3 ... Metering roller wear relay R4 ... Swimsuit roller wear relay T
I + T 2...●・Timer Relay~ Figure 1, Figure 21! l 17 Figure 3

Claims (1)

[Claims] A water fountain roller having a part of its circumferential surface disposed inside the water boat, a water supply means for supplying water to the water boat, a driving means for rotationally driving the water fountain roller, and a water fountain roller that contacts the water fountain roller. A metering roller, a transfer roller that rotates in the opposite direction to the metering roller and comes into contact with it, a swimsuit roller that comes into contact with the transfer roller,
a plate cylinder in contact with the swimsuit roller; a first attachment/detachment means for connecting or disconnecting the metering roller and the transfer roller; and a first attachment/detachment means for attaching or disconnecting the contact state between the metering roller and the transfer roller; and a second attachment/detachment means that operates to bring the contact state between the swimsuit roller and the transfer roller into the contact state, and to release the contact state between the swimsuit roller and the transfer roller after the swimsuit roller and the plate cylinder are separated in the case of a detachment operation. In the water supply device of the printing press, the water supply unit is configured to supply water from the water tube to the plate cylinder in a state in which the water source roller a circuit for operating a driving means for rotationally driving the metering roller, and a circuit for rotating the metering roller after a predetermined time has elapsed since the water base roller has rotated, and under the condition that the machine including the plate cylinder is rotating. a circuit for driving the first attachment/detachment means, and a circuit for driving the second attachment/detachment means so as to put the swimsuit roller into the attachment operation after a predetermined period of time has elapsed after the metering roller has been attached. water supply system for printing presses.