DE29708644U1 - Start-up warning device for a printing press - Google Patents

Description

PATENT ATTORNEYS · EUROPEAN &Rgr;&Agr;&Tgr;&Egr;&Ngr;&Tgr;&Idigr;&Agr;&Tgr;&iacgr;&Ogr;&Rgr;&Ngr;&Egr;&Ugr;&phgr; J ·*)*

Dannenberg · Schubert--G &igr;/del. ^: '

ASSOCIATED WITH KÜHNEN ■ WACKER & PARTNER GROSSE ESCHENHEIMER STRASSE 39, D-60313 FRANKFURT KWP

Patent attorneys GERDA DANNENBERG PA, EP, Dipl.-Ing. SIEGMAR SCHUBERT PA, EP, Dipl.-Ing. DIETHER GUDELt &Rgr;&Lgr; EP, Dr. phil.

Telephone: 069-287274 Telephone: 069-287464 Fax: 069-287242

FRANKFURT

13 May 1997
SS/IS-E101336

MAN Roland Printing Machines AG

Mühlheimer Strasse 341

63075 Offenbach am Main

Start-up warning device for a printing press RAINER A. KÜHNEN PA, EP, Dipl.-fng,

PAUL A. WACKER PA, EP, Dipl.-Ing. Dipl.-Wirtsch.-Ing. DR. PETER WEINHOLD PA, EP, Dr. rer. nat Dipl.-Chem. DR. PETER FÜRNISS PA, EP, Dr. rar. nat. Dipl.-Chem. FERDINAND A. BRANDL PA, EP, Dipl.-Phys. HELMUT HÜBNER PA, EP, DipL-Ing.

KONRAD T. WINTER PA, EP, Dipl.-Ing.

DR. WALTER ROSS PA, EP, Dc-Jng. Dipl.-Ing. DR. JÜRGEN KAISER PA, EP, Dr. rer. nat Dipl.-Chem.

DR. WILLI POLTE PA, EP, Dr.-Ing. nat Dipl.-ing. BERND HENNINGER PA, Dipl.-Ing.

DR. JÖRG DORNER PA, EP, Dr.-Ing. Dlpl.-lng. PETER KINDERMANN PA, EP, Dipl.-Ing.

DR. DYDRA KUHLEN PA, ER Dr.-Jur.

DR. WOLFGANG RITTHALER PA, EP, Dr. rer. nat. Dipl.-Chem.

FREISING

Bank details:

Dresdner Bank Frankfurt 04704150 00 (bank code 50080000)

Postbank Frankfurt 112951-601 (bank code 50010060)

VAT number: DE 812127333

Start-up warning device for a printing press

^ The invention relates to a start-up warning device for a printing machine according to the preamble of claim 1.

Such start-up warning devices are particularly necessary for sheet-fed offset printing machines due to safety regulations

¹ ^ and known to give an acoustic warning signal before the printing press starts. Such warning signals are generated automatically when a start-up command for the printing press drive is given via a command button. Such start-up commands include commands for typing,

¹ ^ Creep speed, ramping up to base or production speed.

A known start-up warning device of the type mentioned at the beginning is equipped with a signal generator for controlling at least one sound generator, which can be designed as a loudspeaker (DE 44 18 998 C1). The signal generator, which is not specified in more detail, is designed in such a way that an alternating voltage corresponding to the operation of the sound generator is provided at its output when a signal is present at its input.

In the context of start-up control devices, signal generators, which can also be referred to as tone generators, are state of the art and are hard-wired to generate a single, predetermined sequence of tones. This can lead to the problem, if several printing machines with start-up warning devices from the same manufacturer or the same design are installed in close proximity, that the warning signals for the individual printing machines cannot be distinguished, so that the operating personnel are irritated by the warning signals and/or, in the worst case, do not pay attention to the warning signals for the machine being operated, so that the warning signals can become ineffective.

It could be thought of producing different signal generators or tone generators of the hard-wired type and keeping them in stock in order to use them in the individual process warning devices at random or specifically after the machines of the same manufacturer have been installed, but this would require the laborious production of different signal generators, their storage and selection.

The present invention is therefore based on the object of creating start-up warning devices that can be easily manufactured and are suitable for issuing individual warning signals for an associated printing press.

This object is achieved by a start-up warning device according to the preamble of claim 1 with the features specified in the characterizing part of claim 1.

A predetermined set of digitized tone sequences is stored in a digital memory of a digital programmable signal generator for all start-up warning devices in at least one production series using technically inexpensive means. From this memory, a controller, which can also be referred to as a computer processor, can select data from a tone sequence that can be assigned to a specific printing machine. To emit an appropriate acoustic warning signal, a memory output of the digital memory is operatively connected to the tone generator via means for digital/analog signal processing. A particular advantage of this start-up warning device is that the controlled selection of a specific one of the stored tone sequences can be carried out in an uncomplicated manner at the location where the printing machine is installed, whereby the tone sequences emitted by other printing machines that have already been installed can be taken into account.

Although signaling devices for control rooms are already part of the

State of the art, in which acoustic and optical signals are used, whereby messages must be coded (DE-Z: CEIG reports July/September 1957, page 179 ff). However, these signaling devices are not start-up warning devices of the generic type and also do not include coding of tone sequences for the purpose of an arbitrary selection with the means specified in the present claim 1.

The state of the art also includes an acoustic warning system for printing machines, in which acoustic signal generators are arranged at specific locations intended for operating the machine and the type of signal differs depending on the control of different measuring sensors (DE 27 54 040 Al). However, the technical means specified in the present claim 1 are not used for this either. Apart from that, with the known acoustic warning system, the signals should only be acoustically distinguishable with regard to an identified cause of malfunction, but not dependent on the individual printing machine.

Further developments of the invention emerge from the subclaims.

According to claim 2, the means for digital/analog signal processing in signal flow directions from the memory output to the tone generator comprise a digital/analog converter, means for envelope control, which in particular according to claim 4 have a low-pass filter, and an adjustable tone amplifier. With these means, an analog alternating voltage signal in the audio frequency range and with a power that ensures compliance with the prescribed sound power of the acoustic warning signal emitted by the tone generator is generated in a technically uncomplicated manner from the selected digitized tone sequence.
35

In an expedient manner, the controller (i.e. processor) of a computer is used multiple times and according to claim 3 also to

uses the fact that the means for envelope control as well as the adjustable sound amplifier can also be controlled by the controller.

In a particularly inexpensive and technically proven way, the digital programmable signal generator with the above-mentioned components can be implemented as a sound module of a personal computer (PC). This sound module is to be adapted to the intended use of the start-up warning device by storing digitized data of a set of tone sequences that are suitable as warning signals, including the data on the intensity of the warning signals, in order to be selected according to the individual intended use for a specific printing press.

An embodiment of the invention is explained below with reference to a drawing, in which Figure 1 shows a schematic block diagram of the start-up warning device:

in Fig. 1 only the part of the start-up warning device of interest here is shown, namely the digital programmable signal generator with a loudspeaker as a sound generator 1, but not the control device connected to a drive of the printing press and the operating buttons which control

mandos to start or advance/reverse the printing press.

An essential component of the digital programmable signal generator is a digital memory 2 in which digitized data of a set of tone sequences are stored. A memory output 3 is led to an undesignated input of a digital/analog converter 4, the output of which is connected to an input of means 5 for envelope control. These means essentially comprise a low-pass filter. An output of the means for envelope control is connected to an adjustable sound amplifier 6, to the output of which the sound generator 1 in the form of a loudspeaker is connected.

is.

For its control, the digital programmable signal generator comprises a controller 7, which can be controlled externally via switches such as S1, S2, S3, SN. The controller controls the digital memory 2 via a line 8 to output the data of a tone sequence and via this and a branching line 9 the digital-analog converter 4, the means for envelope control 5 and a volume control of the adjustable sound amplifier 6. With regard to the volume control, the controller 7 in conjunction with the digital memory 2 and the adjustable sound amplifier 6 is set up so that the volume of the acoustic warning signal emitted by the tone generator is in a prescribed range.

To emit an acoustic warning signal, the digitized data stored in the digital memory 2 for an individual tone sequence are read out of the memory in accordance with a signal request via the switches Sl - SN of the controller 7. In the digital/analog converter at a memory output 3, the corresponding digitized signals are converted into analog signals, which are converted into tone signals in the envelope control means, which are converted into an acoustic warning signal of a characteristic tone sequence by means of the tone generator 1. For this purpose, the tone signals are amplified in the adjustable tone amplifier so that the acoustic warning signal has the desired volume controlled by the controller 7 in the prescribed volume range.

If necessary, for example when setting up additional printing machines next to one another, a different tone sequence can be easily read out from memory 2 by programming the switches Sl - SN accordingly to set δ.

Reference list

1 sound generator

2 digital storage

3 Memory output

4 Digital/analog converter

5 Means of envelope control

6 adjustable sound amplifier

7 Controller

8 Line

9 branching line

Claims (5)

Protection claims 1. Start-up warning device for a printing press with at least one sound generator, in particular a loudspeaker, for emitting an acoustic warning signal at predetermined jQ start-up commands and at least one signal generator providing an alternating voltage suitable for operating the tone generator,
characterized,
that the signal generator is a digital programmable jg signal generator is designed with a digital memory (2) in which a predetermined set of digitized tone sequences is stored and from which a selected one of the tone sequences can be output under the control of a controller (7), and that a memory output (3) is operatively connected to the tone generator via means (4, 5, 6) for digital/analog signal processing. 2. Start-up warning device according to claim 1,
characterized, that the means (5,6) for digital/analog signal processing in the signal flow direction from the memory output (3) to the sound generator comprise a digital/analog converter (4), means (5) for envelope control and an adjustable sound amplifier (6). 3. Start-up warning device according to claims 1 and 2, characterized,
that the means (5) for envelope control and the adjustable sound amplifier (6) can also be controlled by the controller (7). 4. Start-up warning device according to claim 2 or 3, characterized in that the means (5) for envelope curve control comprise a low-pass filter. 5. Start-up warning device according to one of the preceding claims , characterized in that the digital programmable signal generator including the digital memory (2) and the means (4,5,6) for digital/analog signal processing are implemented by a sound module of a personal computer (PC).