JPH0222279Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a device for controlling a water supply mechanism that supplies water to a plate cylinder of a printing press.

[Prior art]

In printing presses, it is necessary to supply ink and moisture to the plate cylinder, and generally a water supply mechanism is used, as shown in Fig. 1, a side view of an example of the configuration. .

That is, a portion is immersed in the water boat 1, and
Water head roller 3 driven and rotated by motor 2
are provided, and in sequential contact with this are metering rollers 4,
A transfer roller 5 and a swimsuit roller 6 are provided, and the swimsuit roller 6 is in pressure contact with the plate cylinder 7 to supply the moisture supplied via each of the rollers 3 to 5 to the plate cylinder 7.

The rotation direction of each roller 3 to 6 is the direction indicated by the arrow, and the metering roller 4, which receives water supply from the water source roller 3, and the transfer roller 5, which is in contact with it, rotate in opposite directions. However, other objects in contact with each other are driven in the same direction.

Furthermore, while the surfaces of the water base roller 3 and transfer roller 5 are chromium-treated, the surfaces of the metering roller 4 and swimsuit roller 6 are coated with rubber, and the metering roller 4 is marked with the arrow. In the A direction, the swimsuit roller 6 is movable in the arrow B and C directions,
Each roller is detachable from the other rollers 3 and 5 and the plate cylinder 7.

Therefore, when adjusting the nip pressure and cleaning the rollers 3 to 6, the metering roller 4 and the bathing roller 6 are removed, and when printing, they are placed into the attached state. The metering roller 4 and the swimsuit roller 6 are controlled individually, and due to an operational error, the swimsuit roller 6 is brought into the wet state before moisture adheres to it, and the ink on the plate cylinder 7 causes the swimsuit roller to become wet. deface 6,
This has resulted in drawbacks such as the metering roller 4 and swimwear roller 6 being inadvertently brought into contact with each other, resulting in a risk of injury to the hands of the worker.

[Summary of the idea]

The present invention has the purpose of eliminating such drawbacks of the conventional method at once, and includes a first mode in which the swimsuit roller is in the clothed state and a metering roller in the unloaded state, and a first mode in which the swimsuit roller and the metering roller are both in the disconnected state. A second mode, a third mode in which the swimsuit roller is removed and the metering roller is in the on state, and a fourth mode in which both the swimsuit roller and the metering roller are in the on state are defined, and these modes are selected by a selection switch. As usual,
It is not possible to shift to another mode until the second mode is selected, and even if the fourth mode is selected immediately from the second mode, a certain period of time has passed after the metering roller is in the contact state. Otherwise, the present invention provides an extremely effective water supply control device for a printing press in which the swimsuit roller does not shift to the wet state.

〔Example〕

The details of the present invention will be explained below with reference to FIG. 2 showing an embodiment.

FIG. 2 is a front view showing the operation panel surface provided with the selection switch RS, and shows the status of each roller 3 to 6 according to the first to fourth modes. In the first mode, the swimsuit roller In the second mode, both the swimsuit roller 6 and the metering roller 4 are in the disconnected state, and in the third mode, the swimsuit roller 6 is in the disconnected state and the metering roller 4 is in the disconnected state. In the wearing state, in the fourth mode, both the swimsuit roller 6 and the metering roller 4 are shown in the wearing state.

Figure 3 is a circuit diagram including a selection switch RS, which switches between the printing state and the adjustment state.
When SS ₁ is operated, power E ₁ is applied to the movable pole of the selection switch RS using the rotary switch.
By selecting the second mode with the selection switch RS, the relay _R1 as a preparation relay operates, self-holding is performed by the contact _R11 , and the contacts _R12 to _R14 are turned on, and the first , 3rd
and prepare for the fourth mode.

In this case, the magnet V1 for the swimsuit roller 6 and the magnet V2 for the metering roller 4 are
Since no current is applied to the rollers 6 and 4, both rollers 6 and 4 remain in the disengaged state as in the second mode shown in FIG.

Next, when the selection switch RS is set to the third mode, the relay R1 performs self-holding and the contact R1 ₂
is on, and in order to prevent the metering roller 4 and transfer roller 5 from contacting each other in a reverse rotation state due to moisture-free conditions and damaging the rubber surface of the metering roller 4. The contact W1 ₁ of the electromagnetic switch W1 that drives the motor 2 in Figure 1 is on, or the electromagnetic switch that turns on and off the driving power of the printing press is in a restored state, and this contact
Under the condition that _MX11 is on and the printing press is stopped, power _E1 is applied to magnet V2 through these contacts, and the operation of magnet V2 causes the third mode shown in FIG. The metering roller 4 is in the applied state as shown in FIG.

In addition, an electromagnetic switch W1 that drives the motor 2
is controlled separately by Switch SS ₂ ,
When the motor 2 is started by the operation of the electromagnetic switch W1, the water supply pump for supplying water to the water boat 1 is also started at the same time.

In addition, the timer T1 is also started together with the magnet V2, and the time required for the water from the water source roller 3 to be supplied to the entire surface of the transfer roller 5, for example,
Contact T1 ₁ is turned on after about 1 second, but in this mode, relay R2 also operates and contact R2 ₁ is turned on.
Since it is turned off, the magnet V1 does not operate, and the swimsuit roller 6 remains in the detached state.

Next, when the selection switch RS is set to the fourth mode, the magnet V2 and timer T1 continue to operate, but the relay R2 is restored and the contact R2 ₁
In order to turn on, it is assumed that relay R1 is self-holding and contacts R1 ₂ and R1 ₄ are on, and power supply E ₁ is applied to magnet V1 via contacts T1 ₁ and R2 ₁ , which causes it to operate. As a result, the swimsuit roller 6 also enters the swimsuit state as shown in the fourth mode shown in FIG.

Note that even if the selection switch RS is used to rapidly switch from the second mode to the fourth mode, the swimsuit roller 6 will not enter the wearing state immediately due to the action of the timer T1, but will change after a certain period of time determined by the timer T1. Since the movement shown by arrows B and C in FIG. 6 comes into contact with the plate cylinder 7, and the adhesion of moisture to the swimsuit roller 6 prevents ink from adhering to the swimsuit roller 6 from the print cylinder 7.

Furthermore, if the selection switch RS is set to the first mode, the magnet V1 operates on the premise that the relay R1 is self-holding and the contact _R13 is on, so the mode is as shown in the first mode shown in Fig. 2. Only the swimsuit roller 6 is in the swimsuit state.

Therefore, it is impossible to shift to another mode unless the second mode is selected, and even if the fourth mode is selected immediately from the second mode, the metering roller 4 will not be in the stuck state. The swimsuit roller 6 does not enter the swimsuit state until a certain period of time has passed.

In contrast to the above, if switch SS ₁ is restored and set to printing status, selection switch RS becomes invalid, while
Contacts MX1 _{and 2} of the electromagnetic switch that turns on and off the driving power of the printing press are on, and the printing press is running at 3000rph.
It is assumed that the operation is at a relatively low speed, contact _W12 of the electromagnetic switch W1 is on, and the motor 2 and water pump are in operation. When the magnet V1 becomes connected, the contact _T11 is turned on after a certain period of time, and the circuit of the magnet V1 is prepared.

Therefore, switch SS ₃ is turned on and relay R is turned on.
3 is activated, self-holding is performed by contact R3 ₁ , and contact R3 ₂ is turned on, magnet V1 is activated, and swimsuit roller 6 is placed in the wearing state.If switch SS ₄ is turned off, the relay is activated. R3 is restored, magnet V1 is also restored, and swimsuit roller 6
becomes a detached state.

However, it is preferable to use a rotary switch as the selection switch RS because the mode selection order is automatically regulated, but other switches may also be used. In addition to using a solenoid valve or a solenoid plunger to drive the metering roller 4,
The same applies to the disconnection state by energization, and the configurations shown in FIGS. 1 to 3 can be arbitrarily selected depending on the situation, and various modifications can be made.

[Effect of idea]

As is clear from the above explanation, according to the present invention, it is not possible to shift to other modes (first, third, and fourth modes) until after selecting the second mode, and Even if you immediately select the fourth mode from the mode, the swimwear roller will not shift to the wearing state until a certain period of time has passed after the metering roller has entered the wearing state, so due to an operational error,
The risk of staining the swimsuit roller with ink or posing a danger to workers is completely eliminated, and a great effect can be obtained as a water supply control device for a printing press.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of the configuration of the water supply mechanism;
The figures and subsequent figures show embodiments of the present invention, with FIG. 2 being a front view of the operation panel, and FIG. 3 being a circuit diagram. 3... Water source roller, 4... Measuring roller, 6...
Swimsuit roller, 7... plate cylinder, RS... selection switch,
R1...Relay (preparation relay), V1, V2...
Magnet...1st mode,...2nd mode,...3rd mode,...4th mode.

Claims (1)

[Scope of Claim for Utility Model Registration] A metering roller that is detachably arranged with respect to the transfer roller and receives moisture from the water source roller, and a metering roller that is detachably arranged with respect to the plate cylinder and that supplies moisture via the transfer roller to the plate cylinder. a first mode in which the swimsuit roller is in the clothed state and the metering roller in the unloaded state; and a second mode in which both the swimsuit roller and the metering roller are in the unloaded state. mode, a third mode in which the swimsuit roller is removed and the measuring roller is placed in the fitted state, and a fourth mode in which both the swimsuit roller and the metering roller are placed in the fitted condition; a preparation relay that performs self-holding and prepares for the first, third, and fourth modes when the second mode is selected; and a preparation relay that performs self-holding to prepare for the first, third, and fourth modes; a magnet that brings the swimsuit roller into the wearing state when selected; a magnet that brings the metering roller into the wearing state when the third and fourth modes are selected on the premise that the preparation relay is self-holding; 1. A water supply control device for a printing press, comprising: a timer for prohibiting the transfer of the swimwear roller to the wet state for a certain period of time after the wetsuit roller enters the wet state.