EP0243728B2 - Système de sécurité pour une machine à imprimer - Google Patents

Système de sécurité pour une machine à imprimer Download PDF

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Publication number
EP0243728B2
EP0243728B2 EP87104965A EP87104965A EP0243728B2 EP 0243728 B2 EP0243728 B2 EP 0243728B2 EP 87104965 A EP87104965 A EP 87104965A EP 87104965 A EP87104965 A EP 87104965A EP 0243728 B2 EP0243728 B2 EP 0243728B2
Authority
EP
European Patent Office
Prior art keywords
safety system
monitoring circuit
computers
braking
safety
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87104965A
Other languages
German (de)
English (en)
Other versions
EP0243728B1 (fr
EP0243728A2 (fr
EP0243728A3 (en
Inventor
Anton Rodi
Hans Müller
Michael Lehnert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0243728A2 publication Critical patent/EP0243728A2/fr
Publication of EP0243728A3 publication Critical patent/EP0243728A3/de
Publication of EP0243728B1 publication Critical patent/EP0243728B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/12—Tripping devices or stop-motions for starting or stopping the machine as a whole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/41—Means for braking press cylinders

Definitions

  • the invention relates to a security system for a printing press, which is provided with at least one drive and braking device and with an electronic control device.
  • the various drives of a printing press are provided with brakes, in which the braking force is exerted by springs and a corresponding voltage is applied to electromagnets to release or release the brakes.
  • the brakes are used both as service brakes and for emergencies. This leads to undesirable wear on the brakes.
  • emergency stop switches are provided at various points on the printing press and possibly also in the vicinity thereof, with the aid of which the printing press can be stopped. So that the motors can be stopped as well as the brakes applied without electrical auxiliary energy, in known safety devices the emergency stop switches are each provided with a normally closed contact and connected in series.
  • DE-A 19 43 312 describes a drive for printing rollers in printing presses in which an electric motor driving the printing roller in cooperation with in order to achieve a high positioning accuracy in normal printing operation an electrical control circuit for the engine speed and for braking the engine are provided in proportion to a respective number of revolutions.
  • switching elements in particular relays, are arranged in the control circuit, which cause the motor to work as a generator.
  • the drive in addition to the control circuit, is only designed for speed-proportional acceleration and deceleration of printing rollers of a printing press, and that this drive is not suitable for actuating one or more braking devices as a function of defined speed ratios as part of a safety system, which provide a quick total - or cause partial braking in the event of an emergency or emergency situation.
  • controller monitoring is disclosed within an electronic drive control and monitoring system, in which an off command is given if there is a long-standing deviation between the speed setpoint and actual speed value.
  • the off command causes an immediate controller disable with delayed switching off of a main contactor, which switches a drive motor to de-energized.
  • the object of the invention is to provide a safety system for a printing press which, depending on the speed of the drive device and the respective operating state of the printing press, enables a defined braking of the moving machine elements.
  • the machine elements can be safely braked using the control stages and power levels for the electric motor as well as the electromechanical braking device.
  • further switches can be connected to inputs of the electronic control device.
  • the press can be specifically stopped - depending on which of these switches has been pressed.
  • a switch when actuated in the area of the paper feeder, it may be expedient to stop the drive of the paper feeder immediately, but to keep the main drive running until the drive in the Press sheets on the machine have left the machine.
  • the measures according to the invention ensure that the motion sequence of the printing press is controlled purely electrically, so that predetermined delays are also possible.
  • the electromechanical braking devices are only required if errors occur in the electronic control device.
  • a special embodiment of this feature is that the safety circuit is supplied with AC line voltage and that the primary winding of a transformer is connected in series with the first contact pairs, the secondary winding of which is connected via a rectifier to the power stages of the monitoring circuit and the computer or computers.
  • This configuration enables the safety circuit to be adapted to semiconductor circuits without the voltage supplying the safety circuit is so low that the series connection of many contacts jeopardizes safe current flow.
  • the additional information obtained through the additional contact pairs can be evaluated in various ways.
  • the emergency stop switches are used to bring the entire machine to a standstill as quickly as possible in the event of a danger. However, malfunctions are possible which only require the machine to be stopped in successive steps.
  • the braking device is actuated by switching off an electromagnet that releases the braking device against a spring force.
  • the braking device is designed in accordance with another development such that the printing press also comes to a standstill can be brought when the drive device applies the highest possible torque.
  • the electromechanical braking device is used very rarely in the system according to the invention, a defect in the braking device that nevertheless occurs could not be noticed. It is therefore provided according to another development that the braking device is checked by actuating the braking device, controlling the driving device for the highest possible torque and evaluating the actual speed value. The check is preferably carried out after switching on the electronic control device.
  • a main drive 61 and various auxiliary drives, of which only two auxiliary drives 71, 72 are shown, are controlled by two computers 52, 53.
  • the computers 52, 53 are connected to one another and to control electronics 56 by means of a bus system 55.
  • a main drive electronics 6 and an auxiliary drive electronics 7 comprise, in addition to power stages, also associated control stages which are equipped with microprocessors, among other things, in a practically implemented system according to the invention.
  • Control electronics 56 has a variety of functions and includes various components. To understand the present invention, however, only the explanation of a monitoring circuit, which is part of the control electronics 56, is required.
  • the monitoring circuit is supplied by a tachometer 9 with the actual value of the machine speed or the speed of the main drive.
  • a setpoint is supplied via the bus system 55.
  • the control electronics supply two contactors (not shown in FIG. 1) with current, so that the electromechanical main drive brake is released.
  • the monitoring circuit in the control electronics 56 sends signals to the main drive electronics 6 when a permissible deviation between the setpoint and actual value is exceeded in order to shut down the main drive 61. These signals can result in the ignition pulses of the power levels being blocked and / or the power levels being controlled with electrical braking.
  • the machine speed will drop rapidly as a result of the electrical braking when the monitoring circuit shuts down the main drive, so that further measures are not required.
  • the printing press can be stopped by actuating the electromechanical main drive brake 60.
  • the monitoring circuit sends a signal to the ignition pulse lock to the main drive electronics 6 in order to avoid that the main drive 61 continues to be supplied with current - if the defect in the main drive electronics 6 permits this.
  • the monitoring circuit also monitors the function of the computers 52, 53 and can, if one computer fails, transfer security-relevant functions to the other computer.
  • the monitoring circuit monitors the auxiliary drive electronics 7, the auxiliary drives 71, 72 and a braking device 70 assigned to the auxiliary drive 71.
  • an emergency stop signal is triggered by a corresponding device 57, it is sent to the computers 52, 53, to the main drive electronics 6, to the auxiliary drive electronics 7 and to the control electronics 56. If there is no defect in the electronic control device, the printing press is stopped as described above without the aid of the electromechanical brakes. Only when there is a defect that prevents this, the printing machine is stopped using the electromechanical brakes.
  • Fig. 2 shows emergency stop switches 11 to 1n, which are connected to an electronic control system for a printing press.
  • the latter consists of an input / output unit 4, a computing unit 5 and power units 6, 7, which are assigned to motors 61, 71.
  • the power units essentially correspond to the main drive electronics 6 and the auxiliary drive electronics 7 (Fig. 1).
  • Only two motors, namely the motor 61 of the main drive and a motor 71 of an auxiliary drive, have been shown, although printing presses can have significantly more motors.
  • the design of the electronic control system in detail is possible in a variety of ways without departing from the scope of the invention.
  • the input / output unit 4 comprises two input / output cards 41, 42, each of which has a multiplicity of inputs and outputs 43, 44.
  • the input / output cards 41, 42 are connected to one another and to the input / output control card 51, which contains the monitoring circuit, among other things, of the computing unit via a bus system 45.
  • the computer unit 5 further comprises a memory card 54 for storing data, for example data from the printing press and data from the jobs to be processed.
  • a memory card 54 for storing data, for example data from the printing press and data from the jobs to be processed.
  • non-volatile memories are provided on the memory card 54.
  • the programs themselves were stored in read-only memories which are arranged on the cards of the computers 52 and 53.
  • a bus system 55 connects the input / output controller 51, the computers 52, 53 and the memory card 54.
  • the input / output unit 4 is provided for binary signals (for example, switches closed, switches open; relays attract, relays drop out), the outputs are digital Signals, which serve to control the power units 6, 7 and thus the motors 61, 71, via the input / output control 51.
  • the input / output control 51 is also supplied with a signal corresponding to the machine speed by a tachometer 9.
  • An electromagnet 63 for releasing the brake is supplied with operating voltage supplied at 66 via two contacts 64, 65 of two contactors 67, 68.
  • the contacts 64, 65 are designed as working contacts, so that the brake is only released when both contacts 64, 65 are closed, which in turn is only the case when both contactors 67, 68 from the input / output unit 4 Voltage are supplied.
  • the emergency switches of which only the emergency switches 11, 12, 13 and 1n are shown for the sake of clarity, can be provided with mushroom push buttons. However, other actuating devices, such as levers, tread strips and switches, which are actuated when protective guards are opened, can also be provided.
  • Each of the emergency switches 11 to 1n has two contact pairs 21 to 2n, 31 to 3n working as a normally closed contact.
  • the respective first contact pairs 21 to 2n are connected in series and connect a connection 1 provided with mains voltage to the primary winding 81 of a transformer.
  • a rectifier 83 is connected to the secondary winding 82 of the transformer. There is thus a galvanic separation between the safety circuit formed by the series connection of the respective first contact pairs and the primary winding 81 and the subsequent circuits.
  • the switching voltage is suitable for driving semiconductor circuits Reduced value, while the voltage supplying the safety circuit has a sufficiently large value to ensure a safe current flow despite the series connection of many contact pairs.
  • Corresponding inputs of the power units 6, 7, the computer 52, 53 and the input / output controller 51 are connected to the safety circuit via a contactor 84.
  • the respective second contact pairs 31 to 3n of the emergency switches 11 to 1n are connected to the inputs of the input / output unit 4 of the electronic control system.
  • the printing press is nevertheless operated via the stopped by the respective first contacts 11 to 1n, the transformer 81, 82, the rectifier 83 and the contactor 84.
  • the electromechanical braking device 60 is actuated.
  • the contactors 67, 68 are de-energized, whereby the magnetic coil 63 is separated from the operating voltage supplied at 66 with the aid of the contacts 64, 65. 2, the control of the contactors 67, 68 takes place via the input / output unit 4, but two separate output circuits are provided for the contactors 67, 68 to ensure high security.
  • switches 85, 86 can be connected to inputs of the input / output unit 4. These switches can be used to call up programs which result in a targeted shutdown of the printing press in accordance with the respective situation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (11)

  1. Système de sécurité pour une machine à imprimer,
    · se composant d'un dispositif d'entraînement pour les éléments entraînés de la machine, qui est relié à un dispositif de commande auquel peuvent être appliqués des signaux représentant des valeurs de consigne et réelles de la vitesse de rotation du dispositif d'entraînement et qui est en liaison avec des étages de puissance et des étages de commande, pour au moins un moteur électrique,
    caractérisé en ce que :
    · il est prévu un circuit de contrôle (51) qui, en cas d'écart excessivement grand entre la valeur de consigne et la valeur réelle, applique aux étages de commande et à un dispositif électromécanique de freinage (60), un signal pour produire un freinage défini des éléments déplacés de la machine,
    · le circuit de contrôle (51) comporte deux ordinateurs (52,53) agissant de façon redondante et une mémoire (54) de programmes de freinage des éléments déplacés de la machine,
    le circuit de contrôle (51) étant relié par l'intermédiaire d'un système de bus (55) avec les ordinateurs (52,53) et avec la mémoire (54) et en outre, par l'intermédiaire d'un autre système de bus (45), avec une unité d'entrée/sortie (4) pour des signaux provenant de contacteurs d'urgence (11,12,13,1n,85,86) disposés dans la machine à imprimer et pour des signaux servant à commander le dispositif électromécanique de freinage (60),
    · les contacteurs d'urgence (11,12,13,1n) comportent chacun un premier et un second contacts de repos (21,22,23,2n ; 31,32,33,3n), les premiers contacts de repos (21,22,23,2n) étant connectés en série, selon les techniques de transmission de signaux, avec les entrées séparées du circuit de contrôle (51), des ordinateurs (52,53) et des étages de commande pour les étages de puissance (6,7), et les seconds contacts de repos (31,32,33,3n) étant reliés à des entrées séparées (43,44) de l'unité d'entrée/sortie (4).
  2. Système de sécurité selon la revendication 1, caractérisé en ce que l'actionnement du dispositif de freinage (60) est effectué par le fait qu'un électro-aimant (63) desserrant le dispositif de freinage (60) en opposition à la force d'un ressort est désactivé.
  3. Système de sécurité selon la revendication 2, caractérisé en qu'il est prévu en série avec les électro-aimant (63) deux paires de contacts (64,65) de deux relais (67,68) et en ce que les relais (67,68) peuvent être activés par l'intermédiaire de circuits séparés de sortie (42) du dispositif électronique de commande.
  4. Système de sécurité selon l'une des revendications précédentes, caractérisé en ce que le dispositif de freinage (60) est agencé de telle sorte que la machine à imprimer puisse également être arrêtée lorsque le dispositif d'entraînement (61) produit le plus grand couple possible.
  5. Système de sécurité selon l'une des revendications précédentes, caractérisé en ce que le circuit de contrôle (51) applique aux étages de puissance (6,7), avant l'actionnement, des signaux de commande servant à arrêter la machine à imprimer et contrôle à nouveau l'écart entre la valeur de consigne et la valeur réelle de la vitesse de rotation.
  6. Système de sécurité selon l'une des revendications précédentes, caractérisé en ce que, par actionnement du dispositif de freinage (60), par commande du dispositif d'entraînement jusqu'au couple maximal possible et par analyse de la valeur réelle de la vitesse de rotation, on contrôle la marche de ce dispositif de freinage (60).
  7. Système de sécurité selon la revendication 6, caractérisé en ce que le contrôle est effectué après enclenchement du dispositif électronique de commande.
  8. Système de sécurité selon l'une des revendications précédentes, caractérisé en ce que, dans le cas d'un dispositif électronique de commande comportant deux ordinateurs (52,53), le circuit de contrôle (51) compare entre elles les fonctions, importantes pour la sécurité des ordinateurs (52,53) et, en cas de panne d'un des ordinateurs (52), la commande du dispositif d'entraînement (61) est affectée à l'autre ordinateur (53).
  9. Système de sécurité selon l'une des revendications précédentes, caractérisé en ce que le circuit de contrôle (51) peut commander d'autres dispositifs de freinage qui sont associés à d'autres dispositifs d'entraînement (71) (entraînements auxiliaires).
  10. Système de sécurité selon la revendication 1, caractérisé en ce que les premières paires de contacts (21 à 2n) sont connectées en série et constituent un circuit électrique de sécurité et en ce que les secondes paires de contacts (31 à 3n) sont reliées individuellement avec des entrées de l'unité d'entrée/sortie (4).
  11. Système de sécurité selon la revendication 10, caractérisé en ce que le circuit électrique de sécurité est alimenté par une tension alternative du réseau et en ce qu'il est prévu en série avec les premières paires de contacts (21 à 2n) l'enroulement primaire (81) d'un transformateur dont l'enroulement secondaire (82) est relié, par l'intermédiaire d'un redresseur (83), avec les étages de puissance (6,7), le circuit de contrôle (51) et le ou les ordinateurs (52,53).
EP87104965A 1986-05-02 1987-04-03 Système de sécurité pour une machine à imprimer Expired - Lifetime EP0243728B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614979 1986-05-02
DE3614979A DE3614979C3 (de) 1986-05-02 1986-05-02 Sicherheitssystem für eine Druckmaschine

Publications (4)

Publication Number Publication Date
EP0243728A2 EP0243728A2 (fr) 1987-11-04
EP0243728A3 EP0243728A3 (en) 1989-08-30
EP0243728B1 EP0243728B1 (fr) 1992-03-18
EP0243728B2 true EP0243728B2 (fr) 1995-12-13

Family

ID=6300079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104965A Expired - Lifetime EP0243728B2 (fr) 1986-05-02 1987-04-03 Système de sécurité pour une machine à imprimer

Country Status (5)

Country Link
US (1) US4951567A (fr)
EP (1) EP0243728B2 (fr)
JP (1) JPS62271745A (fr)
CA (1) CA1286021C (fr)
DE (2) DE3614979C3 (fr)

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Also Published As

Publication number Publication date
DE3614979A1 (de) 1987-11-05
DE3614979C3 (de) 1999-12-16
CA1286021C (fr) 1991-07-09
DE3777437D1 (de) 1992-04-23
EP0243728B1 (fr) 1992-03-18
JPS62271745A (ja) 1987-11-26
EP0243728A2 (fr) 1987-11-04
EP0243728A3 (en) 1989-08-30
US4951567A (en) 1990-08-28
DE3614979C2 (de) 1994-02-10

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