EP0065928B1 - Method for driving a type disk in a disk printer and disk printer therefore - Google Patents

Method for driving a type disk in a disk printer and disk printer therefore Download PDF

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Publication number
EP0065928B1
EP0065928B1 EP19820730027 EP82730027A EP0065928B1 EP 0065928 B1 EP0065928 B1 EP 0065928B1 EP 19820730027 EP19820730027 EP 19820730027 EP 82730027 A EP82730027 A EP 82730027A EP 0065928 B1 EP0065928 B1 EP 0065928B1
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EP
European Patent Office
Prior art keywords
type wheel
type
rotation
printer
drive
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Expired
Application number
EP19820730027
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German (de)
French (fr)
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EP0065928A2 (en
EP0065928A3 (en
Inventor
Wolfgang Hendrischk
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Vodafone GmbH
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Mannesmann AG
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Publication date
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Publication of EP0065928A2 publication Critical patent/EP0065928A2/en
Publication of EP0065928A3 publication Critical patent/EP0065928A3/en
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Publication of EP0065928B1 publication Critical patent/EP0065928B1/en
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    • 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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/24—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being perpendicular to the axis of rotation

Definitions

  • the invention relates to a method for driving a type wheel in a type wheel printer, in which the type wheel is brought into the respective printing position by rotating it step by step by at least one type division distance, and the associated type wheel printer.
  • Typewriter printers generally work with a disk-shaped typewriter that has individual, radially extending arms on which the individual types are arranged.
  • the character set of a modern printer should be at least 96, but for other requirements 104 and more characters. As the number of characters increases, the diameter of a type wheel also increases, whereby the entire number of characters must always be moved in order to set the type wheel in the printing position.
  • the object of the invention is to reduce the duration of the type selection process, in order to keep the expenditure on device parts low. H. to increase the printing speed.
  • the object is achieved according to the invention in that the type wheel is rotated by at least a fixed multiple of the type division distance and that this rotation is simultaneously superimposed by a rotation in the negative or positive sense of rotation by one or more type division distances, each of which is smaller than the fixed multiple of the Type spacing are.
  • the control process is carried out in such a way that the rotation of the type wheel by a fixed multiple with one drive and the rotation of the type wheel by fewer steps than the fixed multiple with an additional drive takes place, both drives working on the axis of rotation of the type wheel and being switched on at the same time.
  • a comparable differential drive method for type wheel printers is known from US-A-3 908 809. However, this method is used for line feed and not for the type wheel rotation. In addition, the additional movement is superimposed on a continuous movement to avoid start-stop processes and does not represent any value addition to reach a certain waypoint.
  • the type wheel printer used for the method according to the invention with individually controllable types of the type wheel, which can be moved for printing by means of a printing hammer against the recording medium lying on the platen, is further developed according to the invention in that a motor for the coarse adjustment and an additional motor for the fine adjustment of the type wheel the input shafts of a differential gear are connected and the output shaft of the differential gear is connected to the axis of rotation of the type wheel. Due to the differential gear, the superimposition of two or more input movements to be added or subtracted can be carried out with simple means.
  • the transmission ratio from the coarse adjustment motor to the auxiliary motor is uneven and is preferably 4: 1.
  • the output shaft of the differential gear consists of a driver shaft on which an angular drive for the axis of rotation of the type wheel is arranged.
  • a further improvement of the invention is that at least the type wheel, the angular drive, the print hammer and its drive elements are combined in a housing which is mounted on the drive shaft and on a fixed axis fixed to the frame of the printer.
  • this housing can be rigid or movable. According to a further feature, it is therefore provided that the housing is designed as a drivable slide and is guided on the drive shaft and on the fixed axis.
  • the reciprocating movement of the carriage is achieved in that the drive for the carriage consists of a cable drive.
  • This cable drive gear is designed according to further features of the invention in that bearing housings for the pulley and cable drum are provided on the sides of the printer frame.
  • a space-saving design also results from the fact that the drive motors for the differential gear are also arranged in the bearing housing of the printer frame.
  • the type wheel printer according to the invention is shown in FIG. 1 only with the components which are in the foreground for the invention.
  • the side walls 1a and 1b serve as the printer frame 1.
  • the platen 2 for the record carrier 3 can be rotated by hand using the rotary handle 4 or automatically via the feed drive 5, which consists of the electric motor 6 and the reduction gear 7.
  • the reduction gear is formed by the pinion 8, which is non-rotatable on the motor shaft 6a, and the gear 9, which is non-rotatably on the shaft 2a.
  • the type wheel 10 consists of a hub 11 with arms 12 attached to it in a star shape, on each of which the different types 13 are arranged.
  • the type wheel 10 can also have a different structure than described. Only the type spacing 14 is important for the invention.
  • such type wheels are interchangeable and of the lowest possible mass.
  • the type wheel 10 is "gradually" by the drive to be described, d. H. by advancing by one or more type spacing 14 for printing a character (letter, numbers and the like) in position 15, in which the print hammer 16 types 13 against the recording medium 3, which can consist of one or more paper webs , strikes.
  • the print hammer 16 is fastened to the core of the electromagnet 17 and is constantly in the position 15.
  • Bearing housings 18 and 19 adjoin the side walls 1a, 1 of the printer frame 1.
  • the fixed axis 20 runs between the bearing housings 18 and 19, namely parallel to the central longitudinal axis of the roller-shaped platen 2.
  • a shaft also runs with the same parallelism, which at the same time forms the output shaft 21 of the differential gear 22 to be described ( Fig. 2).
  • the differential gear 22 (see in particular FIGS. 2 and 4) is driven on the input side by the stronger motor 23 for the rough adjustment and by the weaker auxiliary motor 24 for the fine adjustment.
  • the motor 23 drives the first input shaft 23a and the pinion 23b arranged on it in a rotationally fixed manner on the gearwheel 25, which is freely rotatably mounted on the bearing bush 26.
  • the bearing bush 26 is in turn connected to the output shaft 21 in a rotationally fixed manner via the parallel key 26a.
  • the auxiliary motor 24 drives the second input shaft 24a and the non-rotatable pinion 24b onto the large gearwheel 27, which is itself freely rotatably supported on the bearing bush 26.
  • the bearing bush 26, which is rotatable about the central axis 28 together with the output shaft 21, is axially fixed to the collar 26b and the axial securing means 26c.
  • On the ring projection 29, a plurality of bevel gears 30, 31 are rotatable about the axis 32, which runs perpendicular to the central axis 28 and forms axes of rotation 33.
  • the axes of rotation 33 are arranged on the circumference of the annular projection 29 in a radially extending manner.
  • the bevel gears 30 and 31 engage with their toothing in the associated toothing 34, 35 of the gear 25 and the large gear 27, respectively.
  • the angular drive 36 which is formed from the non-rotatable helical gear 37 and the worm gear 39 which is non-rotatable on the axis of rotation 38 of the type wheel 10.
  • the worm wheel 39 and the axis of rotation 38 are each rotatably mounted in the housing 40 (only indicated in FIG. 1) for the type wheel 10 in rotary bearings 41 and 42.
  • the output shaft 21 is designed as a driver shaft 21a, i. H. the cross-sectional profile is designed as a splined shaft, as a K-section, as a polygonal shaft or only as a shaft with a groove.
  • the correspondingly suitable profile is formed in each case by the bore in the hub 39a of the helical gear 37.
  • the differential gear 22 can optionally be designed as a spur gear differential gear (as shown) or as a bevel gear differential gear.
  • the housing 40 accommodates the type wheel in such a way that the latter can be pivoted for changing. Otherwise, the housing 40 is displaceable on the fixed axis 20, i. H. formed as a carriage 40a (Fig. 1).
  • the drive for the carriage 40a is shown in FIGS. 1 and 3:
  • the carriage motor 43 (FIG. 1) flanged to the bearing housing 19 drives the gearwheel 45 with the pinion 44 which is fixed on its shaft, on the shaft of which the cable drum 46 is provided.
  • the cable drum shaft 47 is mounted at the ends in side parts 19a, 19b of the bearing housing 19.
  • the cable drive also consists of the cable 48, the cable pulley 49 and the cable pulley shaft 50, which are rotatably supported in the side parts 18a, 18b.
  • the rope 48 is attached with its upper run to the carriage 40a, so that, depending on the direction of rotation of the carriage motor 43, the carriage 40a in one direction or the other with constant speed is moved.
  • a kinetic reversal of the driven assemblies is also possible: the housing 40 can be stationary and the recording medium 3 can be moved horizontally.
  • the differential gear 22 for the type wheel 10 can also be accommodated within the housing 40.
  • movement of the slide 40a can also be achieved by a spindle with the motor 43 locked.
  • a back and forth movement of the carriage 40a is also possible by means of a spindle with a motor fixed on the carriage 40a.
  • a back and forth movement of the carriage 40a is also possible by means of a toothed belt.
  • Another alternative for the arrangement of the drive for the carriage 40a is to arrange the motor 43 on the carriage 40a and to have its pinion 44 located on the motor shaft engage in a fixed toothed rack which extends across the width of the printer.
  • the operation of the differential gear 22 is as follows:
  • the engine 23 receives z. B. the command for the coarse adjustment and adjusts the mentioned multiple of a type division distance 14 via the output shaft 21 of the type wheel 10.
  • the auxiliary motor 24 may also receive a command to carry out a positive or negative fine adjustment of the large gear 27, whereby this rotates on the bearing bush 26 and drives the bevel gears 30, 31, which in turn make a relative adjustment of the gear 25.

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  • Character Spaces And Line Spaces In Printers (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Antreiben eines Typenrades in einem Typenraddrucker, bei dem das Typenrad durch schrittweises Drehen um zumindest einen Typenteilungsabstand in die jeweilige Druckstellung gebracht wird, sowie den zugehörigen Typenraddrucker.The invention relates to a method for driving a type wheel in a type wheel printer, in which the type wheel is brought into the respective printing position by rotating it step by step by at least one type division distance, and the associated type wheel printer.

Typenraddrucker arbeiten im allgemeinen mit einem scheibenförmigen Typenrad, das einzelne, strahlenförmig sich erstreckende Arme aufweist, an denen die einzelnen Typen angeordnet sind.Typewriter printers generally work with a disk-shaped typewriter that has individual, radially extending arms on which the individual types are arranged.

Der Zeichenvorrat eines modernen Druckers soll mindestens 96, bei anderen Erfordernissen aber 104 und mehr Zeichen betragen. Bei wachsendem Zeichenvorrat wächst auch der Durchmesser eines Typenrades, wobei zur Einstellung des Typenrades in Abdruckstellung immer der gesamte Zeichenvorrat mitbewegt werden muß.The character set of a modern printer should be at least 96, but for other requirements 104 and more characters. As the number of characters increases, the diameter of a type wheel also increases, whereby the entire number of characters must always be moved in order to set the type wheel in the printing position.

Derartige Typenräder erzeugen jedoch gegenüber den im Matrixdruckverfahren aus Punkten zusammengesetzten Zeichen ein relativ leicht lesbares Zeichenbild. Die bekannten Typenraddrucker sind andererseits für schnelles Schreiben nicht geeignet. Die Ansteuerung des Typenrades erfordert nicht nur einen relativ hohen Steueraufwand, sondern auch eine relativ große Zugriffszeit für die einzelnen Typen, wodurch mit den bekannten Typenrädern nur eine mäßige Schreibgeschwindigkeit möglich ist.However, such type wheels produce a relatively easy-to-read character image compared to the characters composed of dots in the matrix printing process. The known type wheel printers, on the other hand, are not suitable for fast writing. The control of the type wheel requires not only a relatively high control effort, but also a relatively long access time for the individual types, which means that only a moderate writing speed is possible with the known type wheels.

Diese Aufgabe, Typenraddrucker für höhere Druckgeschwindigkeiten geeignet zu gestalten, wird nach dem Stand der Technik durch eine Verdoppelung der Typenräder gelöst, wobei eine Anordnung von zwei mit den Öffnungen gegenüberliegenden becherförmigen Typenträgern gewählt ist (DE-B-2 535 929). Die bekannte Lösung bedarf jedoch eines erhöhten Aufwandes, der gegenüber dem üblichen praktisch verdoppelt wird.This task of designing type wheel printers for higher printing speeds is achieved according to the prior art by doubling the type wheels, whereby an arrangement of two cup-shaped type carriers opposite the openings is selected (DE-B-2 535 929). However, the known solution requires increased effort, which is practically doubled compared to the usual one.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, unter der Bestrebung, den Aufwand an Geräteteilen gering zu halten, die Dauer des Typenauswahlvorgangs zu vermindern, d. h. die Druckgeschwindigkeit zu erhöhen.In contrast, the object of the invention is to reduce the duration of the type selection process, in order to keep the expenditure on device parts low. H. to increase the printing speed.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Typenrad um mindestens jeweils ein festbestimmtes Vielfaches des Typenteilungsabstandes gedreht wird und daß dieser Drehung gleichzeitig eine im negativen oder positiven Drehsinn erfolgende Drehung um einen oder mehrere Typenteilungsabstände überlagert wird, die jeweils kleiner als das festbestimmte Vielfache des Typenteilungsabstandes sind. Dieses Verfahren ermöglicht Druckgeschwindigkeiten von 50 bis 100 Zeichen pro Sekunde und mehr, je nach Qualität der verwendeten Motoren bzw. Ansteuerungen, ohne den bisherigen Aufwand an Geräteteilen wesentlich zu erhöhen.The object is achieved according to the invention in that the type wheel is rotated by at least a fixed multiple of the type division distance and that this rotation is simultaneously superimposed by a rotation in the negative or positive sense of rotation by one or more type division distances, each of which is smaller than the fixed multiple of the Type spacing are. This process enables printing speeds of 50 to 100 characters per second and more, depending on the quality of the motors or controls used, without significantly increasing the previous effort in device parts.

Bei einem Typenrad mit 96 Zeichen, d. h. 47 Typenteilungsabständen (diametral gegenüberliegende Typenarme vorausgesetzt), ist es vorteilhaft, daß das festbestimmte Vielfache auf zehn Typenteilungsabstände festgelegt wird.For a type wheel with 96 characters, i.e. H. 47 type separation distances (provided diametrically opposite type arms), it is advantageous that the fixed multiple is fixed at ten type separation distances.

Das Ansteuerungsverfahren wird hierbei derart durchgeführt, daß das Drehen des Typenrades um das festbestimmte Vielfache mit einem Antrieb und das Drehen des Typenrades um weniger Schritte als das festbestimmte Vielfache mit einem Zusatzantrieb erfolgt, wobei beide Antriebe auf die Drehachse des Typenrades arbeiten und gleichzeitig eingeschaltet werden.The control process is carried out in such a way that the rotation of the type wheel by a fixed multiple with one drive and the rotation of the type wheel by fewer steps than the fixed multiple with an additional drive takes place, both drives working on the axis of rotation of the type wheel and being switched on at the same time.

Zwar ist ein vergleichbares differentielles Antriebsverfahren bei Typenraddruckern durch die US-A-3 908 809 bekanntgeworden. Dieses Verfahren dient jedoch dem Zeilenvorschub und nicht der Typenraddrehung. Außerdem wird die Zusatzbewegung einer kontinuierlichen Bewegung überlagert um Start-Stopvorgänge zu vermeiden und stellt keine Stellenwertaddition zum Erreichen eines bestimmten Wegpunktes dar.A comparable differential drive method for type wheel printers is known from US-A-3 908 809. However, this method is used for line feed and not for the type wheel rotation. In addition, the additional movement is superimposed on a continuous movement to avoid start-stop processes and does not represent any value addition to reach a certain waypoint.

Der für das erfindungsgemäße Verfahren verwendete Typenraddrucker mit einzeln ansteuerbaren Typen des Typenrades, die zum Abdruck mittels eines Druckhammers gegen den auf dem Druckgegenlager liegenden Aufzeichnungsträger bewegbar sind, ist erfindungsgemäß dahingehend weitergebildet, daß ein Motor für die Grobverstellung und ein Zusatzmotor für die Feinverstellung des Typenrades an die Eingangswellen eines Differentialgetriebes angeschlossen sind und die Ausgangswelle des Differentialgetriebes an die Drehachse des Typenrades angeschlossen ist. Aufgrund des Differentialgetriebes läßt sich die Überlagerung von zwei oder mehr eingegebenen zu addierenden oder zu subtrahierenden Bewegungen mit einfachen Mitteln durchführen.The type wheel printer used for the method according to the invention with individually controllable types of the type wheel, which can be moved for printing by means of a printing hammer against the recording medium lying on the platen, is further developed according to the invention in that a motor for the coarse adjustment and an additional motor for the fine adjustment of the type wheel the input shafts of a differential gear are connected and the output shaft of the differential gear is connected to the axis of rotation of the type wheel. Due to the differential gear, the superimposition of two or more input movements to be added or subtracted can be carried out with simple means.

Für die Überlagerung von zwei oder mehr Bewegungen ist es vorteilhaft, daß das Übersetzungsverhältnis vom Grobverstellungsmotor zum Zusatzmotor ungleichmäßig ist und vorzugsweise 4 : 1 beträgt.For the superimposition of two or more movements, it is advantageous that the transmission ratio from the coarse adjustment motor to the auxiliary motor is uneven and is preferably 4: 1.

Gemäß einer weiteren Ausgestaltung der Erfindung ist vorgesehen, daß die Ausgangswelle des Differentialgetriebes aus einer Mitnehmerwelle besteht, auf der ein Winkeltrieb für die Drehachse des Typenrades angeordnet ist.According to a further embodiment of the invention, it is provided that the output shaft of the differential gear consists of a driver shaft on which an angular drive for the axis of rotation of the type wheel is arranged.

Eine weitere Verbesserung der Erfindung besteht darin, daß zumindest das Typenrad, der Winkeltrieb, der Druckhammer und dessen Antriebsorgane in einem Gehäuse zusammengefaßt sind, das auf der Mitnehmerwelle und auf einer am Rahmen des Druckers befestigten festen Achse gelagert ist.A further improvement of the invention is that at least the type wheel, the angular drive, the print hammer and its drive elements are combined in a housing which is mounted on the drive shaft and on a fixed axis fixed to the frame of the printer.

Gemäß der Erfindung kann dieses Gehäuse starr oder beweglich sein. Nach einem weiteren Merkmal ist daher vorgesehen, daß das Gehäuse als antreibbarer Schlitten ausgebildet und auf der Mitnehmerwelle sowie auf der festen Achse geführt ist.According to the invention, this housing can be rigid or movable. According to a further feature, it is therefore provided that the housing is designed as a drivable slide and is guided on the drive shaft and on the fixed axis.

Bei der Ausführung des Gehäuses als antreibbarer Schlitten wird die hin- und hergehende Bewegung des Schlittens dadurch erzielt, daß der Antrieb für den Schlitten aus einem Seilzuggetriebe besteht.When the housing is designed as a drivable carriage, the reciprocating movement of the carriage is achieved in that the drive for the carriage consists of a cable drive.

Dieses Seilzuggetriebe ist nach weiteren Merkmalen der Erfindung dahingehend ausgebildet, daß an den Seiten des Druckerrahmens Lagergehäuse für Seilrolle und Seiltrommel vorgesehen sind.This cable drive gear is designed according to further features of the invention in that bearing housings for the pulley and cable drum are provided on the sides of the printer frame.

Eine raumsparende Bauweise ergibt sich ferner dadurch, daß in dem Lagergehäuse des Druckerrahmens auch die Antriebsmotoren für das Differentialgetriebe angeordnet sind.A space-saving design also results from the fact that the drive motors for the differential gear are also arranged in the bearing housing of the printer frame.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigt

  • Fig. 1 eine perspektivische Ansicht des erfindungsgemäßen Typenraddruckers (ohne Abdeckgehäuse),
  • Fig. 2 einen Teilschnitt durch den Typenraddrucker gemäß der Schnittangabe 11-11 in Fig. 1,
  • Fig. einen Teilschnitt durch den Typenraddrucker gemäß Schnittangabe 111-111 in Fig. 1,
  • Fig. 4 einen vergrößerten Ausschnitt A des Differentialgetriebes im Schnitt gemäß Fig. 2.
An embodiment of the invention is shown in the drawing and will be described in more detail below. It shows
  • 1 is a perspective view of the type wheel printer according to the invention (without cover housing),
  • 2 shows a partial section through the type wheel printer according to section 11-11 in FIG. 1,
  • FIG. 1 shows a partial section through the type wheel printer according to section 111-111 in FIG. 1, FIG.
  • 4 shows an enlarged detail A of the differential gear in section according to FIG. 2.

Der erfindungsgemäße Typenraddrucker ist in Fig. 1 nur mit den für die Erfindung im Vordergrund stehenden Bauteilen dargestellt. Als Drukkerrahmen 1 dienen die Seitenwände 1a und 1b. In diesen Seitenwänden ist das Druckgegenlager 2 für den Aufzeichnungsträger 3 drehbar von Hand über den Drehgriff 4 bzw. automatisch über den Vorschubantrieb 5 betätigbar, der aus dem Elektromotor 6 und dem Untersetzungsgetriebe 7 besteht. Das Untersetzungsgetriebe wird durch das auf der Motorwelle 6a drehfeste Ritzel 8 und dem auf der Welle 2a drehfesten Zahnrad 9 gebildet.The type wheel printer according to the invention is shown in FIG. 1 only with the components which are in the foreground for the invention. The side walls 1a and 1b serve as the printer frame 1. In these side walls, the platen 2 for the record carrier 3 can be rotated by hand using the rotary handle 4 or automatically via the feed drive 5, which consists of the electric motor 6 and the reduction gear 7. The reduction gear is formed by the pinion 8, which is non-rotatable on the motor shaft 6a, and the gear 9, which is non-rotatably on the shaft 2a.

Das Typenrad 10 besteht wie üblich aus einer Nabe 11 mit daran sternförmig befestigten Armen 12, an denen jeweils die unterschiedlichen Typen 13 angeordnet sind. Das Typenrad 10 kann jedoch auch einen anderen Aufbau als beschrieben aufweisen. Für die Erfindung ist lediglich der Typenteilungsabstand 14 von Bedeutung. Im übrigen sind derartige Typenräder auswechselbar und von möglichst geringer Masse. Das Typenrad 10 wird durch den noch zu beschreibenden Antrieb »schrittweise«, d. h. unter Weiterschaltung um einen oder mehrere Typenteilungsabstände 14 für das Abdrucken eines Zeichens (Buchstabe, Ziffern u. dgl.) in die Stellung 15 gebracht, in der der Druckhammer 16 die Typen 13 jeweils gegen den Aufzeichnungsträger 3, der aus einer oder mehreren Papierbahnen bestehen kann, schlägt. Der Druckhammer 16 ist am Kern des Elektromagneten 17 befestigt und befindet sich ständig in der Stellung 15.As usual, the type wheel 10 consists of a hub 11 with arms 12 attached to it in a star shape, on each of which the different types 13 are arranged. However, the type wheel 10 can also have a different structure than described. Only the type spacing 14 is important for the invention. In addition, such type wheels are interchangeable and of the lowest possible mass. The type wheel 10 is "gradually" by the drive to be described, d. H. by advancing by one or more type spacing 14 for printing a character (letter, numbers and the like) in position 15, in which the print hammer 16 types 13 against the recording medium 3, which can consist of one or more paper webs , strikes. The print hammer 16 is fastened to the core of the electromagnet 17 and is constantly in the position 15.

An den Seitenwänden 1a, 1 des Druckerrahmens 1 schließen sich Lagergehäuse 18 bzw. 19 an. Die feste Achse 20 verläuft zwischen den Lagergehäusen 18 und 19, und zwar parallel zur Mittellängsachse des walzenförmigen Druckgegenlagers 2. Zwischen den Lagergehäusen 18 bzw. 19 verläuft ebenfalls mit derselben Parallelität eine Welle, die gleichzeitig die Ausgangswelle 21 des noch zu beschreibenden Differentialgetriebes 22 bildet (Fig. 2).Bearing housings 18 and 19 adjoin the side walls 1a, 1 of the printer frame 1. The fixed axis 20 runs between the bearing housings 18 and 19, namely parallel to the central longitudinal axis of the roller-shaped platen 2. Between the bearing housings 18 and 19, a shaft also runs with the same parallelism, which at the same time forms the output shaft 21 of the differential gear 22 to be described ( Fig. 2).

Das Differentialgetriebe 22 (s. insbesondere die Fig. 2 und 4) wird auf der Eingangsseite von dem stärker ausgelegten Motor 23 für die Grobverstellung und von dem schwächeren Zusatzmotor 24 für die Feinverstellung angetrieben. Hierbei treibt der Motor 23 mit der ersten Eingangswelle 23a und dem auf dieser drehfest angeordneten Ritzel 23b auf das Zahnrad 25, das auf der Lagerbuchse 26 frei drehbar gelagert ist. Die Lagerbuchse 26 ist ihrerseits mit der Ausgangswelle 21 drehfest über die Paßfeder 26a verbunden.The differential gear 22 (see in particular FIGS. 2 and 4) is driven on the input side by the stronger motor 23 for the rough adjustment and by the weaker auxiliary motor 24 for the fine adjustment. In this case, the motor 23 drives the first input shaft 23a and the pinion 23b arranged on it in a rotationally fixed manner on the gearwheel 25, which is freely rotatably mounted on the bearing bush 26. The bearing bush 26 is in turn connected to the output shaft 21 in a rotationally fixed manner via the parallel key 26a.

Der Zusatzmotor 24 treibt hingegen seinerseits mit der zweiten Eingangswelle 24a und dem drehfesten Ritzel 24b auf das Großzahnrad 27, das selbst frei drehbar auf der Lagerbuchse 26 gelagert ist. Die um die Mittelachse 28 zusammen mit der Ausgangswelle 21 drehbare Lagerbuchse 26 ist axial mit dem Bund 26b und der Axialsicherung 26c festgelegt. An dem Ringvorsprung 29 sind mehrere Kegelräder 30, 31 um die Achse 32 drehbar, die senkrecht zur Mittelachse 28 verläuft und Drehachsen 33 bildet. Die Drehachsen 33 sind fest am Umfang des Ringvorsprunges 29 radial verlaufend angeordnet.The auxiliary motor 24, on the other hand, in turn drives the second input shaft 24a and the non-rotatable pinion 24b onto the large gearwheel 27, which is itself freely rotatably supported on the bearing bush 26. The bearing bush 26, which is rotatable about the central axis 28 together with the output shaft 21, is axially fixed to the collar 26b and the axial securing means 26c. On the ring projection 29, a plurality of bevel gears 30, 31 are rotatable about the axis 32, which runs perpendicular to the central axis 28 and forms axes of rotation 33. The axes of rotation 33 are arranged on the circumference of the annular projection 29 in a radially extending manner.

Die Kegelräder 30 und 31 greifen mit ihrer Verzahnung in die zugehörige Verzahnung 34,35 des Zahnrades 25 bzw. des Großzahnrades 27 ein.The bevel gears 30 and 31 engage with their toothing in the associated toothing 34, 35 of the gear 25 and the large gear 27, respectively.

Auf der Ausgangswelle 21 ist ferner der Winkeltrieb 36 angeordnet, der aus dem drehfesten Schraubenrad 37 und dem auf der Drehachse 38 des Typenrades 10 drehfesten Schneckenrad 39 gebildet ist. Das Schneckenrad 39 und die Drehachse 38 sind jeweils im Gehäuse 40 (in Fig. 1 nur angedeutet) für das Typenrad 10 in Drehlagern 41 und 42 drehbar gelagert. Die Ausgangswelle 21 ist als Mitnehmerwelle 21a ausgeführt, d. h. das Querschnittsprofil ist als Vielkeilwelle, als K-Querschnitt, als Mehrkantwelle oder nur als Welle mit Nut ausgeführt. Das entsprechend passende Profil wird jeweils von der Bohrung in der Nabe 39a des Schraubenrades 37 gebildet.Also arranged on the output shaft 21 is the angular drive 36, which is formed from the non-rotatable helical gear 37 and the worm gear 39 which is non-rotatable on the axis of rotation 38 of the type wheel 10. The worm wheel 39 and the axis of rotation 38 are each rotatably mounted in the housing 40 (only indicated in FIG. 1) for the type wheel 10 in rotary bearings 41 and 42. The output shaft 21 is designed as a driver shaft 21a, i. H. the cross-sectional profile is designed as a splined shaft, as a K-section, as a polygonal shaft or only as a shaft with a groove. The correspondingly suitable profile is formed in each case by the bore in the hub 39a of the helical gear 37.

Das Differentialgetriebe 22 kann wahlweise als Stirnrad-Differentialgetriebe (wie gezeichnet) oder als Kegelrad-Differentialgetriebe ausgeführt sein.The differential gear 22 can optionally be designed as a spur gear differential gear (as shown) or as a bevel gear differential gear.

Das Gehäuse 40 nimmt das Typenrad derart auf, daß letzteres zum Wechsel schwenkbar ist. Im übrigen ist das Gehäuse 40 auf der festen Achse 20 verschiebbar, d. h. als Schlitten 40a ausgebildet (Fig. 1).The housing 40 accommodates the type wheel in such a way that the latter can be pivoted for changing. Otherwise, the housing 40 is displaceable on the fixed axis 20, i. H. formed as a carriage 40a (Fig. 1).

Der Antrieb für den Schlitten 40a ist in den Fig. 1 und 3 dargestellt: Der am Lagergehäuse 19 angeflanschte Schlittenmotor 43 (Fig. 1) treibt mit dem auf seiner Welle drehfesten Ritzel 44 das Zahnrad 45, auf dessen Welle die Seiltrommel 46 vorgesehen ist. Die Seiltrommelwelle 47 befindet sich an den Enden in Seitenteilen 19a, 19b des Lagergehäuses 19 drehgelagert. Das Seilzuggetriebe besteht ferner aus dem Seil 48, der Seilrolle 49 und der Seilrollenwelle 50, die in den Seitenteilen 18a, 18b drehgelagert sind. Das Seil 48 ist mit seinem Obertrum am Schlitten 40a befestigt, so daß je nach Drehrichtung des Schlittenmotors 43 der Schlitten 40a in die eine oder andere Richtung mit konstanter Geschwindigkeit bewegt wird.The drive for the carriage 40a is shown in FIGS. 1 and 3: The carriage motor 43 (FIG. 1) flanged to the bearing housing 19 drives the gearwheel 45 with the pinion 44 which is fixed on its shaft, on the shaft of which the cable drum 46 is provided. The cable drum shaft 47 is mounted at the ends in side parts 19a, 19b of the bearing housing 19. The cable drive also consists of the cable 48, the cable pulley 49 and the cable pulley shaft 50, which are rotatably supported in the side parts 18a, 18b. The rope 48 is attached with its upper run to the carriage 40a, so that, depending on the direction of rotation of the carriage motor 43, the carriage 40a in one direction or the other with constant speed is moved.

Eine kinetische Umkehr der angetriebenen Baugruppen ist ebenfalls möglich: So kann das Gehäuse 40 feststehend und der Aufzeichnungsträger 3 horizontal bewegt werden. Das Differentialgetriebe 22 für das Typenrad 10 kann auch innerhalb des Gehäuses 40 untergebracht sein. Anstelle des Seilzuggetriebes kann eine Bewegung des Schlittens 40a auch durch eine Spindel bei festgestelltem Motor 43 erzielt werden. Eine Hin- und Herbewegung des Schlittens 40a ist ebenfalls mittels einer Spindel bei einem am Schlitten 40a festen Motor möglich. Eine Hin-und Herbewegung des Schlittens 40a ist auch mittels Zahnriemens möglich. Eine weitere Alternative für die Anordnung des Antriebs für den Schlitten 40a ist, den Motor 43 auf dem Schlitten 40a anzuordnen und dessen auf der Motorwelle befindliches Ritzel 44 in eine ortsfeste, sich über die Breite des Druckers erstreckende Zahnstange eingreifen zu lassen.A kinetic reversal of the driven assemblies is also possible: the housing 40 can be stationary and the recording medium 3 can be moved horizontally. The differential gear 22 for the type wheel 10 can also be accommodated within the housing 40. Instead of the cable drive, movement of the slide 40a can also be achieved by a spindle with the motor 43 locked. A back and forth movement of the carriage 40a is also possible by means of a spindle with a motor fixed on the carriage 40a. A back and forth movement of the carriage 40a is also possible by means of a toothed belt. Another alternative for the arrangement of the drive for the carriage 40a is to arrange the motor 43 on the carriage 40a and to have its pinion 44 located on the motor shaft engage in a fixed toothed rack which extends across the width of the printer.

Die Wirkungsweise des Differentialgetriebes 22 ist folgende: Der Motor 23 erhält z. B. den Befehl für die Grobverstellung und verstellt um das erwähnte Vielfache eines Typenteilungsabstandes 14 über die Ausgangswelle 21 das Typenrad 10. Während dieser Verstellbewegung erhält jedoch auch der Zusatzmotor 24 ggf. einen Befehl, eine positive oder negative Feinverstellung des Großzahnrades 27 durchzuführen, wobei sich dieses auf der Lagerbuchse 26 dreht und die Kegelräder 30, 31 antreibt, die ihrerseits eine Relativverstellung des Zahnrades 25 vornehmen. So wird z. B. bei einem Befehl für eine Verstellung des Typenrades 10 um 47 Schritte (Typenteilungsabstände 14) das Zahnrad 25 um 50 Schritte (=10 Schritte zu je fünf Teilungsabständen vorgedreht und das Großzahnrad 27 um drei Teilungsabstände »negativ« gedreht (im entgegengesetzten Drehsinn). Folglich überträgt das Differentialgetriebe über die Ausgangswelle 21 einen Verstellweg des Typenrades 10 um 47 Schritte.The operation of the differential gear 22 is as follows: The engine 23 receives z. B. the command for the coarse adjustment and adjusts the mentioned multiple of a type division distance 14 via the output shaft 21 of the type wheel 10. However, during this adjustment movement the auxiliary motor 24 may also receive a command to carry out a positive or negative fine adjustment of the large gear 27, whereby this rotates on the bearing bush 26 and drives the bevel gears 30, 31, which in turn make a relative adjustment of the gear 25. So z. B. with a command for an adjustment of the type wheel 10 by 47 steps (type spacing 14), the gear 25 is rotated 50 steps (= 10 steps at five spacing intervals) and the large gear 27 is rotated "negative" by three spacing distances (in the opposite direction). Consequently, the differential gear transmits an adjustment path of the type wheel 10 by 47 steps via the output shaft 21.

Es ist jedoch auch möglich, nur dem Zahnrad 25 einen Drehbefehl um eine volles Vielfaches zu übertragen, so daß eine Drehung um 10, 20, 30 oder40-Teilungsabstände 14 erfolgt.However, it is also possible to transmit a rotation command by a full multiple only to the gear wheel 25, so that a rotation by 10, 20, 30 or 40 pitch intervals 14 takes place.

Sofern nur das Großzahnrad 27 angetrieben wird, können im beschriebenen Beispiel Drehbefehle für Teilungsabstände 14 zwischen einem und neun Schritten ausgeführt werden. Die Überlagerung der groben Schritte und der feinen Schritte gestattet, kürzere Verstellzeiten, wie bereits vorstehend beschrieben, zu erreichen.If only the large gearwheel 27 is driven, turning commands for pitch spacings 14 between one and nine steps can be carried out in the example described. The superimposition of the coarse steps and the fine steps allows shorter adjustment times to be achieved, as already described above.

Claims (11)

1. Method to drive a type wheel (10) in a type wheel printer, in which the type wheel (10) is brought into the respective printing position by rotating in stages through at least one type division space (14), characterized in that the type wheel (10) is rotated through in each case at least one fixed multiple of the type division space (14) and that this rotation is simultaneously overlapped by a rotation in a negative or position direction of rotation through one or more type division spaces (14), which in each case are smaller than the fixed multiple of the type division space (14).
2. Method according to Claim 1, characterized in that the fixed multiple is set at ten type division spaces (14).
3. Method according to Claims 1 and 2, characterized in that the rotation of the type wheel (10) through the fixed multiple takes place with a drive and the rotation of the type wheel (10) through less steps than the fixed multiple takes place with an additional drive, in which both drives operate on the axis of rotation (38) of the type wheel (10) and are engaged simultaneously.
4. Type wheel printer to carry out the method according to Claims 1 to 3, with individually controllable types of the type wheel, which for printing are movable by means of a printing hammer against the recording medium lying on the printing counter support, characterized in that a motor (23) for coarse adjustment and an additional motor (24) for fine adjustment of the type wheel (10) are connected to the primary shafts (23a, 24a) of a differential gear (22), and the output shaft (21) of the differential gear (22) is connected to the axis of rotation (38) of the type wheel (10).
5. Type wheel printer according to Claim 4, characterized in that the transmission ratio of the coarse adjustment motor (23) to the additional motor (24) is variable and advantageously amounts to 4 : 1.
6. Type wheel printer according to Claims 4 and 5, characterized in that the output schaft (21) of the differential gear (22) consists of a clutch shaft (21 a), on which an angular drive (36) is ar- rangend for the axis of rotation (38) of the type wheel (10).
7. Type wheel printer according to Claims 4 and 6, characterized in that at least the type wheel (10), the angular drive (36), the printing hammer (16) and its drive elements (17) are united in a housing (40), which is mounted on the clutch shaft (21a) and on a fixed axis (20) attached to the frame (1) of the printer.
8. Type wheel printer according to Claims 4 to 7, characterized in that the housing (40) is constructed as a drivable slide (40a) and is carried on the clutch shaft (21a) and also on the fixed axis (20).
9. Type wheel printer according to Claims 4 to 8, characterized in that the drive for the slide (40a) consists of a cable line gearing.
10. Type wheel printer according to Claims 4 to 9, characterized in that at the sides of the printer frame (1) bearing housings (18, 19) are provided for the cable pulley (49) and the cable drum (46).
11. Type wheel printer according to Claims 4 to 10, characterized in that in the bearing housing (19) of the printer frame (1) the driving motors (23, 24) for the differential gear (22) are also arranged.
EP19820730027 1981-05-22 1982-03-11 Method for driving a type disk in a disk printer and disk printer therefore Expired EP0065928B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813121149 DE3121149C2 (en) 1981-05-22 1981-05-22 Type plate printer
DE3121149 1981-05-22

Publications (3)

Publication Number Publication Date
EP0065928A2 EP0065928A2 (en) 1982-12-01
EP0065928A3 EP0065928A3 (en) 1983-11-30
EP0065928B1 true EP0065928B1 (en) 1985-12-27

Family

ID=6133380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820730027 Expired EP0065928B1 (en) 1981-05-22 1982-03-11 Method for driving a type disk in a disk printer and disk printer therefore

Country Status (3)

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EP (1) EP0065928B1 (en)
JP (1) JPS57203581A (en)
DE (1) DE3121149C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5302036A (en) * 1991-08-21 1994-04-12 Tokyo Electric Co., Ltd. Multi-color ribbon cassette position adjusting apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1989044U (en) * 1967-11-17 1968-07-11 Siemens Ag ADJUSTMENT DEVICE FOR TYPE CARRIER OF A TYPEWRITER, IN PARTICULAR TELEPHONE MACHINE.
US3707214A (en) * 1969-05-23 1972-12-26 Olivetti & Co Spa Serial printing device
US3908809A (en) * 1974-12-30 1975-09-30 Ibm High speed printer
US3853024A (en) * 1973-10-29 1974-12-10 Ibm Two speed drive system for print mechanism or the like
GB1469589A (en) * 1973-12-26 1977-04-06
JPS5418608B2 (en) * 1974-08-13 1979-07-09
US4025837A (en) * 1975-06-30 1977-05-24 International Business Machines Corporation Adaptive control circuit for a stepping motor
US4178108A (en) * 1978-06-26 1979-12-11 International Business Machines Corporation Apparatus for space synchronizing carrier and rotatable print disk positions in on-the-fly printing
DE2935727C2 (en) * 1978-09-05 1984-07-05 Canon K.K., Tokio/Tokyo Control circuit for a carriage and type disk drive of a printer
DE3021340C2 (en) * 1980-06-06 1982-09-16 Gottfried 8501 Winkelhaid Burkhardt Printing unit for e.g. office machines

Also Published As

Publication number Publication date
DE3121149C2 (en) 1985-02-07
JPS57203581A (en) 1982-12-13
EP0065928A2 (en) 1982-12-01
DE3121149A1 (en) 1982-12-09
EP0065928A3 (en) 1983-11-30

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