DE19516331C2 - Control panel for a printing press - Google Patents

Description

To control an operating process on a printing press are various input devices for control signals a control device known.

An easy entry is with an electrical switch or keyboard possible, when pressed a to controlling operation is activated. Such switches may be associated with an optical display device that to display the switch position "on" or "off" or to Display serve that the operating process is activated or Not. If, for example, when the switch is actuated Actuating device in the printing press is put into operation, then sensors can provide a signal that an actuator is switched on. The sensor signal can by means of a Control device switching on a lamp or an LED cause so that for the operator of the printing press it can be seen that the adjusting device is actually in Operation is or not. The state of the display depends on it directly from the switch position "on" or "off" or from State of the operating process to be controlled "activated" or "not activated".

In the generic control device for a printing press described in DE 32 20 378 A1, a Control panel used with a variety of push buttons, the push buttons in several Groups are arranged and a separate enter key to initiate execution a command is provided. This enter key is provided with a lamp. At Initiation of a command via the enter key will cause the lamp to flash offset and switched on continuously during the execution of the command. The signaling state of the lamp depends directly on whether and how the command is executed.

Keys or keyboards are also used as input means known, which is an alphanumeric or graphic display contain. The content of the display of each key is from a control device determines by making a selection a key assignment table is made. The one time selected keyboard layout remains during the processing of Program steps or computer-controlled operations receive. Such keyboards with displays are expensive. The display information can only be found under  Maintaining a certain viewing distance and angle be perceived by an operator.

It is therefore an object of the invention, with conventional ones, well visible and inexpensive switches and assigned discrete display elements the operation of a printing press to improve.

The task is carried out using a method according to the characteristics of Claim 1 solved.

The invention makes it possible for the Operator guidance of the printing press automatically Adapts machine configuration. Under machine configuration becomes the entirety of the states of all operations one Printing machine and the aggregates connected to it understood that in signal form in a control device are processable. As an operation are both Measurement display or actuation operations outside of Control device to understand as well as operations that within the control device when processing Program steps run with the help of a computer.

LED or incandescent lamps are advantageous as display elements usable, each in continuous operation, flashing or in "Off" state are operable. For the flashing mode, in Dependence on the signals about the state of others Operations different blinking frequencies or Duty cycles can be provided for the display elements.

The invention will be based on a drawing are explained in more detail. The drawing shows in

Fig. 1 is a highly simplified schematic of a printing press and

Fig. 2 shows a signal scheme for the operation of the display device.

The printing press shown in FIG. 1 contains a printing unit 2 with a plate cylinder 3 , a blanket cylinder 4 and a printing cylinder 5 . A web 6 runs in the gap between the blanket cylinder 4 and the impression cylinder 5 and is wound up from a roll 7 onto a roll 8 during printing. A motor 9 is used to drive the printing press 1 , the plate cylinder 3 , the blanket cylinder 4 and the printing cylinder 5 being coupled to one another via a gear transmission. The rotary movement of the plate cylinder 3 is detected by an incremental encoder 10 . The printing unit 2 is accessible via a protective screen 11 , the opening state of which can be derived from a contact 12 . Incremental encoder 10 , motor 9 and contact 12 are connected to a control device 13 , which contains a computer, with the aid of which the operating processes run under program control. To start the engine 9 , a button 14 is provided, to which an LED 15 is assigned as a display device. The button 14 and the LED 15 are connected to the control device 13 via lines 16 and 17 .

The implementation of the method will be described below with reference to FIG. 2. If the protective grille 11 is open, the motor 9 must not be able to be switched on. When the protective grille 11 is open, the contact 12 is not closed. The encoder 10 does not generate a pulse train. The motor 9 is not activated. The signals from the contact 12 , from the transmitter 10 and from the motor control are evaluated in the control device 13 . The LED 15 is switched off, which can be seen in diagram a. The extinguished LED 15 indicates that the motor 9 cannot be switched on at the moment with the key 14 .

When the protective grid 11 is closed, the contact 12 is closed. The signal of the closed contact 12 is processed in the control device 13 together with the signals from the incremental encoder 10 and the motor control signals. As a result of this, the LED 15 is controlled for flashing operation with a first flashing frequency f ₂ , which is intended to clarify the current curve I (t) in diagram b ₁ . The flashing frequency f ₂ signals to an operator that the motor 9 would be put into operation with the button 14 at slow speed.

After presetting processes have elapsed, signals are derived from sensors or as a result of program steps, which include the completion of the presetting. These signals are linked in the control device with the signals from the contact 12 , the signals from the incremental encoder 10 and the signals for the motor control, as a result of which the LED 15 is controlled to flash at frequency f ₂ (diagram b ₂ ). The frequency f ₂ shows the operator that 14 of the motor 9 could be switched on by means of the key so that a nominal speed could be achieved, which corresponds to the production speed.

By pressing the button 14 , the production speed is reached after a certain time. The signal, which signals that the production speed has been reached, is derived from the incremental encoder 10 and evaluated in the control device 13 . In conjunction with signals about the status of other operating processes, the LED 15 is switched to continuous operation (diagram c).

Should during printing operation, e.g. B. the protective grille 11 are opened, then the processing of the signal, which results from opening the contact 12 , the LED 15 is immediately switched to the de-energized state (diagram a).

Reference list

1

Printing press

2nd

Printing unit

3rd

Plate cylinder

4th

Blanket cylinder

5

Impression cylinder

6

train

7, 8

role

9

engine

10th

Incremental encoder

11

Protective grille

12th

Contact

13

Control device

14

Button

15

LED

16, 17

cables

Claims (3)

1. control panel for a printing press, with a large number of switches which can be actuated by hand, with which two switching states can be implemented and with which an optical display device which can be set into three display states is assigned locally,
in which the switches for activating and the display device for displaying the state of an operating process are connected to a control device which is connected to sensors for monitoring the operating process and has an arrangement for processing the sensor signals for controlling the display device, characterized in that
that the respective display device ( 15 ) can be switched to the first display state if a blocking signal for the operating process which can be activated with the assigned switch ( 15 ) is present at the output of the arrangement for processing the sensor signals,
that the respective display device ( 15 ) can be switched to the second display state when a release signal for the operating process which can be activated with the assigned switch ( 14 ) is present at the output of the arrangement for processing the sensor signals,
that the respective display device ( 15 ) can be switched to the third state when an activation signal from the course of an operating process is present at the output of the arrangement for processing the sensor signals
and that the respective display device ( 15 ), which is in one of the three display states, can be converted into another of the three display states by changing one of the sensor signals. 2. Device according to claim 1, characterized in that
that the display device ( 15 ) is switched off in the first display state,
that the display device ( 15 ) emits flashing light in the second display state and that the display device ( 15 ) lights continuously in the third display state. 3. Device according to claim 2, characterized, that the flashing frequency of the flashing light emitted in the second display state in Dependence on the signals about the state of other operations is changed.