EP0063784B1 - Dispositif d'impression par marteaux avec un système d'électro-aimants à plongeur comportant un détecteur électro-optique - Google Patents

Dispositif d'impression par marteaux avec un système d'électro-aimants à plongeur comportant un détecteur électro-optique Download PDF

Info

Publication number
EP0063784B1
EP0063784B1 EP19820103372 EP82103372A EP0063784B1 EP 0063784 B1 EP0063784 B1 EP 0063784B1 EP 19820103372 EP19820103372 EP 19820103372 EP 82103372 A EP82103372 A EP 82103372A EP 0063784 B1 EP0063784 B1 EP 0063784B1
Authority
EP
European Patent Office
Prior art keywords
plunger
armature
magnet system
time
type magnet
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
Application number
EP19820103372
Other languages
German (de)
English (en)
Other versions
EP0063784A2 (fr
EP0063784A3 (en
Inventor
Ulrich Dr. Ing. Heider
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.)
Siemens AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0063784A2 publication Critical patent/EP0063784A2/fr
Publication of EP0063784A3 publication Critical patent/EP0063784A3/de
Application granted granted Critical
Publication of EP0063784B1 publication Critical patent/EP0063784B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/44—Control for hammer-impression mechanisms
    • B41J9/46—Control for hammer-impression mechanisms for deciding or adjusting hammer-firing time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/16—Means for cocking or resetting hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means

Definitions

  • the invention relates to a drive device according to the preamble of patent claim 1.
  • Plunger armature magnet systems as a drive device for the print hammer in type printing devices or the printer needles in mosaic printing devices are generally known in printing technology and have been used successfully.
  • Such a plunger magnet system for a type printer is described in DE-OS 28 39 024.
  • the timing of the magnet system is a major problem.
  • the printing speed of the impact printer provided with such a plunger magnet system depends on how quickly it succeeds in returning the print hammer, which is designed as the armature of the magnet system, to its starting position without bouncing after the impression has been taken.
  • the degree of damping includes strongly dependent on the number of copies used in the printing process.
  • a submersible anchor system which contains a photo sensor.
  • the photo sensor is designed to be adjustable and then emits an output signal when the anchor of the submersible anchor system passes through a specific point.
  • the measurement signal generated by the photosensor serves to determine whether the armature is in the idle state or not, this criterion in turn being used to determine whether an adjustment movement can be carried out with the type wheel or not.
  • Movement quantities of the armature are not recorded with such a device.
  • EP-A-0 026 387 shows and describes a drive device for a folding armature magnet system, in which a folding armature drives the actual pressure tappet.
  • the plunger is surrounded by a permanent magnet, which returns the plunger to its starting position after the impression has been taken.
  • a sensing device inductively measures the flight time of the plunger from the start of the excitation pulse to the impact on the paper and the speed of the plunger. In the case of a first impression, the flight time is measured by a measuring device and, after the impression has been taken, compared with a stored flight time. If there is a deviation, the flight time is corrected in a subsequent print by influencing the excitation coil current of the hinged armature.
  • print hammer in the following includes both the needles of a mosaic printer and the hammer of a type printing device.
  • the object of the invention is to design a plunger magnet system of the type mentioned at the outset such that the flight time of the printing hammer can be corrected before the impression is taken.
  • the plunger magnet system consists essentially of an excitation coil 3 and the plunger armature 4 serving as a drive element for the type wheel 1.
  • the plunger armature 4 has two non-magnetic guide parts 5 and 6 which, together with bushings 7 and 8, prevent the plunger armature from reaching the surface 9 of the excitation coil radially 3 is pulled and thus prevented from its actual axial movement.
  • the submersible armature 4 protrudes with its rear part through the bushing 8 and rests against a stop 11 under the action of a return spring 10 in the idle state.
  • a sensor 12 in this case a photoelectric switching device, is made of a Infrared light barrier, the photo path being arranged in the range of movement of the submersible anchor 4.
  • the plunger armature magnet is controlled via a control circuit arrangement which, for. B. can be carried out according to the block diagram of FIG. 2. It essentially consists of two flip-flops 13 and 14 for timing the circuit arrangement. Switching transistors 15, 16 and 17 connect the magnet coil 3 to a constant voltage source 19 as a function of the output signal of an amplifier 18, which regulates the excitation current with imprint and the braking current in the coil 3.
  • the amplifier 18, which is connected as a current regulator, is also connected its positive output at a voltage divider consisting of resistors 20 to 24 and the associated switching transistor 25. Resistor 20 is designed as a potentiometer.
  • the negative input of the amplifier 18 is connected to a measuring resistor 27 for determining the actual value of the current in the coil 3.
  • the other resistors 28 to 32 are used in a known manner to adapt the switching transistors.
  • the monostable flip-flop 14 is linked to the output of the photoelectric switching device 12 via a delay element 33.
  • the circuit arrangement is controlled via a z. B. Triggered by a keyboard, not shown here, pulse 34.
  • the flip-flops 13 and 14 are connected via an OR gate 35 to the control input of the switching transistor 17.
  • the drive device has an armature control device 36. It contains a measuring element 27 linked to the pulse input 34 and the sensor 12 and a comparison control device 30 provided with a memory 38 and a comparator 39, the output of which is connected to the reset input of the flip-flop 13.
  • a z. B. designed as a warning lamp function warning device 41 is linked to the time measuring element 37. Their function will be explained later. The same applies to the measuring element 42 required for the basic setting of the impression energy after the immersion armature magnet system has been installed in the pressure device.
  • the immersion anchor detection system shown in FIG. 1 is explained below with reference to FIG. 2 and the voltage-time diagram of FIG. 3. 3, the upper pulse train shows the course of the excitation pulses at the output of the OR gate 35 and the lower pulse train shows the course of the excitation pulses at the output of the sensor 12.
  • flip-flop 13 is set via the start pulse input at input 34 and the control path of transistors 17 and 25 is thus interrupted via OR gate 35. This makes the current control device effective.
  • the switching transistor 16 and the power transistor 15 become conductive, as a result of which the current in the excitation coil 3 increases suddenly up to the maximum value determined by the control device.
  • the armature 4 is accelerated under the effect of the generated magnetic field.
  • the time measuring element 37 of the armature control device 36 begins, which, for. B. can be designed as a counter, its operation.
  • the light barrier opens and a rectangular pulse with a falling edge occurs at the output of sensor 12. This rectangular pulse stops the time measuring element 37 and the result of the measurement is fed to a comparison control device 40.
  • This comparison control device 40 can e.g. B. be designed as a microprocessor and contains a memory 38 with associated central control unit 39.
  • the path per unit of time running from the anchor from the stop to the light cabinets is a measure of the pressure energy applied. If the throughput time determined by the time measuring element 37 differs from the target time stored in the memory 38, then the central unit 39 controls accordingly the resetting of the flip-flop 13 at the time T3. At time T3, the flip-flop 13 is returned to its original position. The transistors 17 and 25 thus become conductive again, the current regulation being interrupted and the power transistor 15 being switched off. The armature control device 36 thus controls the time length of the activation of the transistor 15 and thus the excitation current in the coil 3 via the flip-flop 13.
  • the output signal of the sensor 12 delayed by the time A via the timing element 33 activates the monostable flip-flop 14 that can be set with a rising pulse edge which interrupts the switching transistor 17 again via the OR gate 35 at the time T5 and thus activates the coil 3.
  • the switching transistor 25 is in the conductive state because of the flip-flop 13, so that the amplifier 18 regulates the excitation current in the coil 3 to a lower braking current in this case.
  • the armature 4 is completely braked by this braking current and can lay down against the stop 11 without reverberation.
  • the monostable multivibrator 14 tilts back into its original position, which makes the transistor 17 conductive again and thus interrupts the excitation current in the coil 3 via the power transistor 17.
  • Another impression cycle can be started by a new start pulse 35.
  • the circuit arrangement is also equipped with a function warning device 41.
  • This function warning device is connected, for example, to the time measuring element 37 and then emits a warning signal if not within a certain period of time after the start of the
  • Submersible magnet system passes the end of the armature 4, the light barrier 12.
  • Exceeding this time period indicates a malfunction of the plunger magnet system.
  • This can e.g. B. a break in the armature or a defect in the excitation coil.
  • the function warning device itself can consist of a comparator which compares the counter reading of the time measuring element 37 with a stored target value and activates a warning device when exceeded.
  • the basic setting of the impression energy can be accomplished in a simple manner after the plunger magnet system has been installed in the pressure device.
  • the control circuit arrangement has a potentiometer 20, by means of which the maximum excitation current in the coil 3 can be set.
  • a measuring element 42 can be coupled to the output of the sensor 12.
  • B. can consist of a time measuring device with associated display device, via which the throughput time of the armature is measured from the initial interruption of the light barrier to the interruption of the light barrier when the armature returns to the starting position.
  • This lead time of the armature is a measure of the impression energy and with the basic setting of the immersion armature magnet system after installation in the pressure seal, this time can be compared with a predetermined target time and a basic setting of the excitation current in the coil 3 can be made by changing the potentiometer 20.
  • the design of the drive device is not limited to the example shown. Other embodiments are also conceivable for the individual elements.
  • the sensor 12 can e.g. can also be an element that detects the movement of the armature by induction, or two sensors can be arranged in the armature path.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)

Claims (7)

1. Système d'aimant à induit plongeur comportant une bobine d'excitation (3), un induit (4) réalisé sous la forme d'un marteau d'impression d'un dispositif à marteaux d'impression et prenant appui, dans sa position de repos, contre une butée (11), et un capteur optoélectronique (12) disposé dans la zone de déplacement de l'induit, caractérisé par le fait qu'il est prévu un montage (13 à 40) de commande de l'induit servant à commander la durée de l'impulsion de courant de la bobine d'excitation et qui branche le courant de la bobine lors d'un signal de démarrage et déclenche simultanément une minuterie (37) du montage de commande, que le capteur optoélectronique (12) est disposé de telle sorte qu'il est branché par l'induit (4) en une position située à distance entre la position initiale et la position terminale de l'induit et délivre alors un signal de commande qui arrête la minuterie (37), auquel cas le temps de parcours déterminé par cette minuterie, est envoyé à un dispositif (40) de commande de comparaison du montage de commande de l'induit, dans lequel le temps de parcours considéré est comparé à une valeur de consigne prédéterminée et qui interrompt le courant de la bobine à un instant (T3) qui dépend du résultat de la comparaison obtenu dans le dispositif de commande de comparaison.
2. Système d'aimant à induit plongeur suivant la revendication 1, caractérisé par le fait que le capteur (12) déclenche une impulsion de freinage par l'intermédiaire du montage de commande (13 à 40) lors de la réception d'un signal de commande retardé le cas échéant par l'intermédiaire d'un circuit de retardement (33) et délivré par le marteau d'impression revenant dans sa position initiale.
3. Système d'aimant à induit plongeur suivant l'une des revendications 1 ou 2, caractérisé par le fait qu'un dispositif de commande de comparaison (40) contenant une mémoire (38) pour le temps de parcours de consigne, est branché en aval de la minuterie (37).
4. Système d'aimant à induit plongeur suivant l'une des revendications 1 à 3, caractérisé par le fait qu'après le montage du système d'aimant à induit plongeur dans un dispositif d'impression, le réglage de l'énergie d'impression, qui est influencée par des tolérances de fabrication, du système d'aimant à induit plongeur est réalisé grâce au fait que le temps de parcours de l'induit lors d'une opération d'impression est détecté par l'intermédiaire du capteur optoélectronique (12) au moyen d'un dispositif associé de mesure (42) et un réglage du courant d'excitation dans la bobine d'excitation (3) est exécuté en fonction du résultat de mesure, par l'intermédiaire d'un organe de réglage (20).
5. Système d'aimant à induit plongeur suivant la revendication 4, caractérisé par le fait que l'organe de réglage est réalisé sous la forme d'un potentiomètre (20).
6. Système d'aimant à induit plongeur suivant l'une des revendications 1 à 5, caractérisé par le fait qu'au système d'aimant à induit plongeur se trouve associé un dispositif (41) d'avertissement de fonctionnement; qui produit un signal d'avertissement en fonction d'un temps de parcours de la voie définie de déplacement de l'induit, détecté par l'intermédiaire du capteur optoélectrique (12).
7. Système d'aimant à induit plongeur suivant la revendication 1, caractérisé par le fait que le montage de commande (16 à 40) est agencé de telle sorte que lors de la réception d'un signal de commande éventuellement retardé par l'intermédiaire d'un circuit de retardement (33) et déclenché au moyen du capteur (12) par le marteau d'impression revenant dans sa position initiale, ce montage produit une impulsion de freinage dans la bobine d'excitation (3).
EP19820103372 1981-04-24 1982-04-21 Dispositif d'impression par marteaux avec un système d'électro-aimants à plongeur comportant un détecteur électro-optique Expired EP0063784B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3116430 1981-04-24
DE19813116430 DE3116430C2 (de) 1981-04-24 1981-04-24 Hammerdruckvorrichtung mit einem einen optoelektronischen Sensor enthaltenden Tauchankermagnetsystem

Publications (3)

Publication Number Publication Date
EP0063784A2 EP0063784A2 (fr) 1982-11-03
EP0063784A3 EP0063784A3 (en) 1985-01-09
EP0063784B1 true EP0063784B1 (fr) 1987-07-01

Family

ID=6130796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103372 Expired EP0063784B1 (fr) 1981-04-24 1982-04-21 Dispositif d'impression par marteaux avec un système d'électro-aimants à plongeur comportant un détecteur électro-optique

Country Status (2)

Country Link
EP (1) EP0063784B1 (fr)
DE (1) DE3116430C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547087A (en) * 1983-01-20 1985-10-15 Siemens Aktiengesellschaft Microprocessor-controlled printing mechanism having an opto-electronic sensor
DE3346133A1 (de) * 1983-12-21 1985-07-04 Ibm Deutschland Gmbh, 7000 Stuttgart Automatische flugzeitmessung in anschlagdruckern
US4678355A (en) * 1985-07-02 1987-07-07 Xerox Corporation Print tip contact sensor for quiet impact printer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130804A5 (fr) * 1971-02-23 1972-11-10 Nortec Computer Devices
AU521251B2 (en) * 1977-09-14 1982-03-25 Exxon Research And Engineering Company Hammer for impact printer
DE2933616C2 (de) * 1979-08-20 1982-09-23 Siemens AG, 1000 Berlin und 8000 München Dämpfungsvorrichtung für einen als Klappankermagnetsystem ausgebildeten elektromagnetischen Antrieb für den Druckhammer in einer Druckhammeranordnung
US4347786A (en) * 1979-10-01 1982-09-07 International Business Machines Corporation Impact printer hammer flight time and velocity sensing means
US4429342A (en) * 1981-04-24 1984-01-31 Siemens Aktiengesellschaft Impact printing device with an improved print hammer

Also Published As

Publication number Publication date
DE3116430C2 (de) 1983-03-31
EP0063784A2 (fr) 1982-11-03
EP0063784A3 (en) 1985-01-09
DE3116430A1 (de) 1982-11-18

Similar Documents

Publication Publication Date Title
DE2847492C2 (de) Schaltungsanordnung in einem Druckwerk mit einer Stoßvorrichtung
DE69028802T2 (de) Erfassung des Einschaltens einer Spule
DE2629096C3 (de) Steuerschaltung für einen Schrittmotor
DE2602906C2 (fr)
DE2928304C2 (de) Steuerschaltung zum Aufrechterhalten einer konstanten Farbintensität bei einer thermischen Aufzeichnungsvorrichtung
EP0064632B1 (fr) Dispositif de marteau imprimant
EP0116850B1 (fr) Système d'impression avec induit plongeur commandé par microprocesseur et contenant un détecteur opto-électronique
DE2908235C2 (de) Vorrichtung an einer Einspritzpumpe mit einer Regelstange zur Einstellung der Fördermenge von Brennstoff für den Betrieb einer Brennkraftmaschine
DE3036919C2 (de) Druckhammerantieb für einen Punktmatrixdrucker
DE3727283C2 (fr)
EP0063784B1 (fr) Dispositif d'impression par marteaux avec un système d'électro-aimants à plongeur comportant un détecteur électro-optique
DE69512545T2 (de) Optischer Trigger für eine Frankiermaschine
DE3329800C2 (fr)
DE69003975T2 (de) Vorrichtung zur automatischen Druckspalteinstellung für einen Druckkopf.
DE2848786C3 (de) Schaltungsanordnung für die Synchronisierung der Auftrittszeitpunkte von Druckhammeraufschlag mit dem Eintreffen der Drucktype an der Druckstelle
DE3116402C2 (de) Rückprallarmes Tauchankermagnetsystem
DE2648828C3 (de) Vorrichtung zum Betätigen von Elektromagneten
DE2511260C3 (de) Schaltungsanordnung in einer Strickmaschine
DE2404799C2 (de) Steuerschaltung für die Ausrichtung von Druckhämmern in Schnelldruckern
DE3739295C1 (de) Verfahren zur Rueckpralldaempfung bei Druckhammermagneten in Schreib- oder aehnlichen Bueromaschinen
DE2013413A1 (fr)
EP0406236B1 (fr) Dispositif de controle du transport de supports d'enregistrement en feuilles dans une machine d'impression par electrophotographie
DE3001908C2 (de) Einrichtung zur Messung des Drehwinkels einer Welle einer Maschine
DE3919310C2 (fr)
DE3805081A1 (de) Elektromagnetische antriebsschaltung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19841213

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH FR GB IT LI NL SE

ET Fr: translation filed
ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19880421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19880430

Ref country code: CH

Effective date: 19880430

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19881101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881229

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19890428

Year of fee payment: 8

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19900422

EUG Se: european patent has lapsed

Ref document number: 82103372.7

Effective date: 19910115