EP0310731A1 - Record carrier transport device for a matrix printer - Google Patents

Record carrier transport device for a matrix printer Download PDF

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Publication number
EP0310731A1
EP0310731A1 EP87730123A EP87730123A EP0310731A1 EP 0310731 A1 EP0310731 A1 EP 0310731A1 EP 87730123 A EP87730123 A EP 87730123A EP 87730123 A EP87730123 A EP 87730123A EP 0310731 A1 EP0310731 A1 EP 0310731A1
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EP
European Patent Office
Prior art keywords
rollers
pairs
bearing frame
bearing
frame
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.)
Granted
Application number
EP87730123A
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German (de)
French (fr)
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EP0310731B1 (en
Inventor
Erich Steppe
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.)
Vodafone GmbH
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Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT87730123T priority Critical patent/ATE77067T1/en
Priority to DE8787730123T priority patent/DE3779757D1/en
Priority to EP87730123A priority patent/EP0310731B1/en
Priority to US07/256,049 priority patent/US4936696A/en
Publication of EP0310731A1 publication Critical patent/EP0310731A1/en
Application granted granted Critical
Publication of EP0310731B1 publication Critical patent/EP0310731B1/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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/036—Rollers co-operating with a roller platen
    • B41J13/048—Front and rear rollers both mounted on a common carrier
    • B41J13/054—Front and rear rollers both mounted on a common carrier on the paper apron concentric with the roller platen
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts

Definitions

  • the invention relates to a device for transporting record carriers in printers, in particular in matrix printers, in which single sheets or alternately endless webs with and without edge perforation can be processed, a tractor abutment for endless webs and driven and non-driven pressure rollers or pressure roller pairs being assigned to a writing abutment.
  • Such paper transport devices serve the purpose of a full support on the print abutment and thus also a line-precise feed, the feed when inserting and removing must take into account the detection of the end of a paper web or a single sheet or a copy set (form set).
  • Paper transport devices which can be used for continuous webs and single sheets at the same time are known (EP-A2-0 099 120).
  • This known paper transport device consists of a mounting assembly that transports single sheets in a lying position with the tractors for continuous webs perforated at the edge and in a vertical position of the mounting assembly.
  • an attachable transport device on the attachment module itself. Modules that can be placed in this way cannot be manufactured and assembled with sufficient accuracy and require impermissibly large tolerance values.
  • additional components are required, so that this design causes great effort and thus high costs.
  • the high assembly costs are also disadvantageous.
  • the invention is therefore based on the object of a device for transporting different recording media (perforated continuous paper webs, non-perforated continuous webs, single sheets, Copy sets, form sets) with a minimum of parts, whereby the assembly effort must also be taken into account.
  • the object is achieved according to the invention in a device of the type described in the introduction in that one or more pressure roller groups, each consisting of a plurality of roller pairs, are provided, that each pressure roller group is arranged on its own bearing frame, and that the bearing frame is moved from a rest position into a position by means of a common adjusting element Operating position or vice versa are adjustable parallel to the platen.
  • a device is the simplest solution to feed, advance, i.e., punch perforated endless webs, non-perforated endless webs, single sheets, copy sets and form sets. to be able to process overall.
  • the effort provided for this only includes a pressure roller group integrated into the office machine or the printer, which can be switched on and off.
  • a pin-shaped cylindrical abutment (platen roller) can advantageously be assigned this pinch roller group on the circumference in such a way that the transfer of the single sheets or paper webs can take place with a full support on the abutment. In this case, the guiding and pushing or tensile forces are separated such that the pressure roller group has only non-driven roller pairs.
  • a particularly cost-effective assembly results from the fact that the bearing frames can be inserted and latched or unlocked and removed when the platen roller is removed from the printer frame through openings in the printer frame.
  • the system can therefore be used particularly advantageously in printer designs in which the platen roller with its bearings can be easily expanded.
  • the common adjusting member consists of a rotatable D-axis mounted in the side plates of the printer frame, each of which is provided by recesses in the bearing frame runs.
  • a non-positive and / or positive assignment of the D-axis to these recesses does not require large tolerances and is therefore particularly inexpensive to manufacture and assemble.
  • an adjusting lever connected to the D-axis is provided on the outside of the side plate, the pin-shaped end of which is guided in an obliquely upwardly extending recess.
  • the obliquely upward recess allows the D-axis to be raised and lowered when the adjustment lever is pivoted.
  • Another improvement of the invention is that the individual pairs of rollers are mounted in the bearing frame radially compliant above by means of a flat spring through openings in the upper side of the bearing frame.
  • the printer frame 1 consists of the side boards 2 and 3 and a connecting piece 4, which also forms one side of a paper guide channel.
  • the connecting piece 4 is curved because a circular cylindrical platen 6 is provided as the abutment 5.
  • the platen roller 6 is hung on the journal 7 by means of axle holders 8 in associated bearing cutouts 9. The assembly movement during hanging is shown by dash-dotted lines 10.
  • driven pressure roller pairs are used for endless tracks instead of the driven transport rollers 12 shown.
  • the drive takes place via a gear wheel 13 on the axis of rotation of the platen roller 6, which is itself driven by an electric motor (not shown).
  • the gear 13 rotates a further gear 14 on the shaft 15, which is rotatably supported in a cover 16 and carries a plurality of transport rollers 12, which are opposed in the cover 16, non-driven, radially spring-mounted counter-rollers 17.
  • the tractor pair 11 is adjustable on an axis 18 and a drivable shaft 19 to the width of the endless track 20.
  • a print head carriage 22 with a print head 23 can be moved in parallel in front of the writing abutment 5.
  • the drive for the pair of tractors 11 is switched on, so that the endless web 20 passes the arched connecting piece 4 and passes around the platen roller 6 in front of the print head 23, is labeled there and then by the transport rollers 12 and the counter rollers 17 are conveyed from the office machine.
  • pressure roller groups 24 and 25 which each have several pairs of rollers 26.
  • Each of the pressure roller groups 24 and 25 is mounted on a separate bearing frame 27 (made of plastic) which is adapted to the curvature of the connecting piece 4. All bearing frames 27 are adjusted from a rest position into an operating position or vice versa parallel to the platen roller 6 by a common adjusting member 28. 2, the bearing frames 27 are in their rest position and therefore do not exert any frictional forces on the endless track 20.
  • the adjusting member 28 is now actuated, whereby a single sheet 29 is pressed through the single sheet shaft 30 via the frictional forces of the roller pairs 26 onto the platen roller 6.
  • the bearing frame 27, its actuating means and its assembly are described in more detail below. 1 shows, the bearing frames 27 are inserted into openings 31 when the platen roller 6 is removed from the printer frame 1. Of course, during the initial assembly, the mounting of the bearing frame 27 can take place before the platen roller 6 is installed.
  • the common adjusting member 28 is formed by a D-axis 28a, which run through recesses 32.
  • the bearing frame 27 forms these recesses 32 through left and right of the D-axis 28a on web walls 33 vertically extending guide rails 34 and 35.
  • the D-axis 28a is connected to an adjusting lever 36.
  • the adjusting lever 36 has a peg-shaped end 36a, which is guided in an obliquely upward recess 37.
  • the D axis 28a itself is guided in elongated holes 38 in the side plates 2 and 3, in which the D cross section slides to different heights, ie to a lower layer according to FIG. 2 and to an upper layer according to FIG. 3.
  • the individual pairs of rollers 26 are rotatably supported by means of a flat spring 39 projecting through openings 40 in such a way that they protrude radially resiliently on the upper bearing frame side 27a and can be installed or removed together with the bearing frame 27 as a unit (FIG. 1).
  • the web walls 33 in this case carry latching arms 41 (FIG. 1) which can be resiliently pivoted transversely to the guide direction of the print head carriage 22.
  • roller pairs 26 After installation of the bearing frame 27, the roller pairs 26 are pressed against the platen roller 6 with uniform force distribution on all rollers. Unevenness and different thicknesses in the paper as well as concentricity tolerances of the platen roller 6 and the roller pairs 26 are compensated for by the resilient inherent movement of the roller pairs 26. The roller axes remain parallel to the platen roller 6.

Abstract

In such a device for the transport of record carriers (20, 29) in printers and, in particular, in matrix printers, individual sheets (21) or, alternatively, continuous webs (20) are processed both with and without edge perforations. In this arrangement, a tractor pair (11) for continuous webs (20) and driven and undriven pressure rollers (12, 17) or pressure roller pairs are associated with a platen roller (5). <??>To reduce the manufacturing and assembly costs for alternative processing of edge-perforated continuous webs, unperforated continuous webs, single sheets, self-copy sets and form sets, it is proposed that one or more groups (24, 25) of pressure rollers consisting in each case of a plurality of pairs (26) of rollers are provided, that each group (24, 25) of pressure rollers is arranged on its own bearing frame (27) and that the bearing frames (27) are adjustable parallel to the platen (6) from a resting position to an operating position or vice versa by means of a common adjustment device (28). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Transportieren von Aufzeichnungsträgern in Druckern, insbesondere in Matrixdruckern, in der Einzelblätter oder wechselweise Endlosbahnen mit und ohne Randlochung verarbeitbar sind, wobei einem Schreibwiderlager ein Traktorpaar für Endlosbahnen und angetriebene und antriebslose Andrückrollen bzw. Andrückrollenpaare zugeordnet sind.The invention relates to a device for transporting record carriers in printers, in particular in matrix printers, in which single sheets or alternately endless webs with and without edge perforation can be processed, a tractor abutment for endless webs and driven and non-driven pressure rollers or pressure roller pairs being assigned to a writing abutment.

Derartige Papier-Transportvorrichtungen dienen dem Zweck einer satten Auflage auf dem Druckwiderlager und damit auch einem zeilengenauen Vorschub, wobei das Vorschieben beim Ein- und Ausbringen ein Erfassen des Endes einer Papierbahn oder eines Einzelblattes oder eines Durchschreibsatzes (Formularsatz) berücksichtigen muß.Such paper transport devices serve the purpose of a full support on the print abutment and thus also a line-precise feed, the feed when inserting and removing must take into account the detection of the end of a paper web or a single sheet or a copy set (form set).

Papiertransporteinrichtungen, die zugleich für Endlosbahnen und Einzelblätter verwendet werden können, sind bekannt (EP-A2-0 099 120). Diese bekannte Papiertransporteinrichtung besteht aus einer Aufsetzbaugruppe, die in liegender Stellung mit den Traktoren für am Rand perforierte Endlosbahnen und in senkrechter Stellung der Aufsetzbaugruppe Einzelblätter transportiert. Für Einzelblätter ist es aber erforderlich, auf die Aufsetzbaugruppe selbst noch eine aufsteckbar ausgestaltete Transporteinrichtung zu setzen. Derart doppelt aufsetzbare Baugruppen sind nicht ausreichend genau herstellbar und montierbar und bedingen unzulässig große Toleranzwerte. Außerdem sind zusätzliche Bauteile erforderlich, so daß diese Bauweise einen hohen Aufwand und damit hohe Kosten verursacht. Auch die hohen Montagekosten sind nachteilig. Außerdem ist eine Justierung der Einzelteile während der Montage schwierig.Paper transport devices which can be used for continuous webs and single sheets at the same time are known (EP-A2-0 099 120). This known paper transport device consists of a mounting assembly that transports single sheets in a lying position with the tractors for continuous webs perforated at the edge and in a vertical position of the mounting assembly. For single sheets, however, it is necessary to place an attachable transport device on the attachment module itself. Modules that can be placed in this way cannot be manufactured and assembled with sufficient accuracy and require impermissibly large tolerance values. In addition, additional components are required, so that this design causes great effort and thus high costs. The high assembly costs are also disadvantageous. In addition, it is difficult to adjust the individual parts during assembly.

Der Erfindung ist daher die Aufgabe zugrundegelegt, eine Vorrichtung zum Transport von unterschiedlichen Aufzeichnungsträgern (randgelochten Endlospapierbahnen, ungelochte Endlosbahnen, Einzelblätter, Durchschreibsätze, Formularsätze) mit einem minimalen Aufwand an Teilen zu schaffen, wobei auch der Montageaufwand zu berücksichtigen ist.The invention is therefore based on the object of a device for transporting different recording media (perforated continuous paper webs, non-perforated continuous webs, single sheets, Copy sets, form sets) with a minimum of parts, whereby the assembly effort must also be taken into account.

Die gestellte Aufgabe wird bei einer Vorrichtung der eingangs bezeichneten Gattung erfindungsgemäß dadurch gelöst, daß eine oder mehrere jeweils aus mehreren Rollenpaaren bestehende Andruckrollengruppen vorgesehen sind, daß jede Andruckrollengruppe an einem eigenen Lagerrahmen angeordnet ist und daß die Lagerrahmen mittels eines gemeinsamen Verstellorgans aus einer Ruhestellung in eine Betriebsstellung oder umgekehrt parallel zur Schreibwalze verstellbar sind. Eine solche Vorrichtung stellt die einfachste Lösung dar, randgelochte Endlosbahnen, ungelochte Endlosbahnen, Einzelblätter, Durchschreibsätze und Formularsätze führen, vorschieben, d.h. insgesamt verarbeiten zu können. Der hierfür vorgesehene Aufwand umfaßt lediglich eine in die Büromaschine bzw. den Drucker integrierte Andruckrollengruppe, die ein- und ausgeschaltet werden kann. Einem kreisringförmig zylindrischen Schreibwiderlager (Schreibwalze) kann diese Andruckrollengruppe vorteilhafterweise derart am Umfang zugeordnet werden, daß die Umführung der Einzelblätter oder Papierbahnen mit satter Auflage auf dem Schreibwiderlager erfolgen kann. Hierbei ist eine derartige Trennung der Führungs- und Schub- bzw. Zugkräfte vorgenommen, daß die Andruckrollengruppe nur nicht angetriebene Rollenpaare aufweist.The object is achieved according to the invention in a device of the type described in the introduction in that one or more pressure roller groups, each consisting of a plurality of roller pairs, are provided, that each pressure roller group is arranged on its own bearing frame, and that the bearing frame is moved from a rest position into a position by means of a common adjusting element Operating position or vice versa are adjustable parallel to the platen. Such a device is the simplest solution to feed, advance, i.e., punch perforated endless webs, non-perforated endless webs, single sheets, copy sets and form sets. to be able to process overall. The effort provided for this only includes a pressure roller group integrated into the office machine or the printer, which can be switched on and off. A pin-shaped cylindrical abutment (platen roller) can advantageously be assigned this pinch roller group on the circumference in such a way that the transfer of the single sheets or paper webs can take place with a full support on the abutment. In this case, the guiding and pushing or tensile forces are separated such that the pressure roller group has only non-driven roller pairs.

Eine besonders kostengünstige Montage ergibt sich dadurch, daß die Lagerrahmen jeweils bei aus dem Druckerrahmen ausgebauter Schreibwalze durch Öffnungen des Druckerrahmens einsetzbar und rastbar bzw. entriegelbar und ausbaubar sind. Das System kann daher besonders vorteilhaft bei Druckerkonstruktionen angewendet werden, bei denen die Schreibwalze mit ihren Lagern leicht ausbaufähig ist.A particularly cost-effective assembly results from the fact that the bearing frames can be inserted and latched or unlocked and removed when the platen roller is removed from the printer frame through openings in the printer frame. The system can therefore be used particularly advantageously in printer designs in which the platen roller with its bearings can be easily expanded.

In Verbesserung der Erfindung ist vorgesehen, daß das gemeinsame Verstellorgan aus einer in den Seitenplatinen des Druckerrahmens gelagerten drehbaren D-Achse besteht, die jeweils durch Ausnehmungen der Lagerrahmen verläuft. Eine kraft- und/oder formschlüssige Zuordnung der D-Achse zu diesen Ausnehmungen erfordert keine großen Toleranzen und ist daher besonders kostengünstig in der Herstellung und bei der Montage.In an improvement of the invention it is provided that the common adjusting member consists of a rotatable D-axis mounted in the side plates of the printer frame, each of which is provided by recesses in the bearing frame runs. A non-positive and / or positive assignment of the D-axis to these recesses does not require large tolerances and is therefore particularly inexpensive to manufacture and assemble.

Weitere Merkmale der Erfindung bestehen darin, daß an der Außenseite der Seitenplatine ein mit der D-Achse verbundener Stellhebel vorgesehen ist, dessen zapfenförmiges Ende in einer schräg nach oben verlaufenden Ausnehmung geführt ist. Die schräg nach oben verlaufende Ausnehmung gestattet Anheben und Absenken der D-Achse bei Verschwenkung des Verstellhebels.Further features of the invention consist in that an adjusting lever connected to the D-axis is provided on the outside of the side plate, the pin-shaped end of which is guided in an obliquely upwardly extending recess. The obliquely upward recess allows the D-axis to be raised and lowered when the adjustment lever is pivoted.

Eine andere Verbesserung der Erfindung besteht darin, daß in dem Lagerrahmen die einzelnen Rollenpaare mittels einer Flachfeder durch Öffnungen der oberen Lagerrahmenseite vorstehend radial nachgiebig gelagert sind. Diese Merkmale sorgen dafür, daß die Rollenpaare sich bei unterschiedlich dicken Formularsätzen bzw. bei dünnen Einzelblättern entsprechend anpassen und die gewünschte satte Auflage auf dem Schreibwiderlager bewirken.Another improvement of the invention is that the individual pairs of rollers are mounted in the bearing frame radially compliant above by means of a flat spring through openings in the upper side of the bearing frame. These features ensure that the pairs of rolls adapt accordingly in the case of form sets of different thicknesses or in the case of thin single sheets and bring about the desired full support on the abutment.

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

  • Fig. 1 eine auseinandergezogene Darstellung eines Matrixdruckers mit den Teilen der Papiertransportvorrichtung bei abgenommenem Druckergehäuse,
  • Fig. 2 eine Seitenansicht des Matrixdruckers im Teilschnitt in der Funktionsstellung "Endlosbahn" und
  • Fig. 3 eine Seitenansicht des Matrixdruckers wie Fig. 2 in der Funktionsstellung "Einzelblatt".
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
  • 1 is an exploded view of a matrix printer with the parts of the paper transport device with the printer housing removed,
  • Fig. 2 is a side view of the matrix printer in partial section in the functional position "endless web" and
  • Fig. 3 is a side view of the matrix printer as Fig. 2 in the "single sheet" position.

Der Druckerrahmen 1 besteht aus den Seitenplatinen 2 und 3 und einem Verbindungsstück 4, das zugleich eine Seite eines Papierführungskanals bildet. Das Verbindungsstück 4 ist gewölbt ausgeführt, weil als Schreibwiderlager 5 eine kreiszylindrische Schreibwalze 6 vorgesehen ist. Die Schreibwalze 6 wird an den Achszapfen 7 mittels Achshaltern 8 in zugehörige Lagerausschnitte 9 eingehängt. Die Montagebewegung während des Einhängens ist durch strichpunktierte Linien 10 dargestellt.The printer frame 1 consists of the side boards 2 and 3 and a connecting piece 4, which also forms one side of a paper guide channel. The connecting piece 4 is curved because a circular cylindrical platen 6 is provided as the abutment 5. The platen roller 6 is hung on the journal 7 by means of axle holders 8 in associated bearing cutouts 9. The assembly movement during hanging is shown by dash-dotted lines 10.

Bei Wahl eines Schreibwiderlagers 5, das nicht aus einer kreiszylindrischen Schreibwalze 6 besteht, sondern z.B. einen Druckbalken bildet, werden außer einem Traktorpaar 11 für Endlosbahnen angetriebene Andruckrollenpaare anstelle der dargestellten angetriebenen Transportrollen 12 verwendet. Der Antrieb erfolgt über ein Zahnrad 13 auf der Drehachse der Schreibwalze 6, das selbst durch einen (nicht gezeigten) Elektromotor angetrieben wird. Das Zahnrad 13 dreht ein weiteres Zahnrad 14 auf der Welle 15, die in einer Abdeckung 16 drehgelagert ist und mehrere Transportrollen 12 trägt, denen in der Abdeckung 16 drehgelagerte, nicht angetriebene, radial federnd gelagerte Gegenrollen 17 gegenüberliegen.When choosing a platen 5, which does not consist of a circular cylindrical platen 6, but e.g. forms a pressure bar, in addition to a pair of tractors 11, driven pressure roller pairs are used for endless tracks instead of the driven transport rollers 12 shown. The drive takes place via a gear wheel 13 on the axis of rotation of the platen roller 6, which is itself driven by an electric motor (not shown). The gear 13 rotates a further gear 14 on the shaft 15, which is rotatably supported in a cover 16 and carries a plurality of transport rollers 12, which are opposed in the cover 16, non-driven, radially spring-mounted counter-rollers 17.

Das Traktorenpaar 11 ist auf einer Achse 18 und einer antreibbaren Welle 19 auf die Breite der Endlosbahn 20 einstellbar. Auf einem Führungsachsenpaar 21 ist ein Druckkopfschlitten 22 mit einem Druckkopf 23 vor dem Schreibwiderlager 5 parallel verfahrbar.The tractor pair 11 is adjustable on an axis 18 and a drivable shaft 19 to the width of the endless track 20. On a pair of guide axes 21, a print head carriage 22 with a print head 23 can be moved in parallel in front of the writing abutment 5.

Für die Funktion "Endlosbahn" (Fig. 2) ist der Antrieb für das Traktorenpaar 11 eingeschaltet, so daß die Endlosbahn 20 an dem gewölbten Verbindungsstück 4 vorbei um die Schreibwalze 6 herumgeführt vor den Druckkopf 23 gelangt, dort beschriftet wird und anschließend durch die Transportrollen 12 und die Gegenrollen 17 aus der Büromaschine gefördert werden.For the "endless web" function (FIG. 2), the drive for the pair of tractors 11 is switched on, so that the endless web 20 passes the arched connecting piece 4 and passes around the platen roller 6 in front of the print head 23, is labeled there and then by the transport rollers 12 and the counter rollers 17 are conveyed from the office machine.

Unterhalb der Schreibwalze 6 befinden sich Andruckrollengruppen 24 und 25, die jeweils mehrere Rollenpaare 26 besitzen. Jede der Andruckrollengruppen 24 und 25 ist an einen separaten, der Wölbung des Verbindungsstückes 4 angepaßten Lagerrahmen 27 (aus Kunststoff) gelagert. Sämtliche Lagerrahmen 27 werden durch ein gemeinsames Verstellorgan 28 aus einer Ruhestellung in eine Betriebsstellung oder umgekehrt parallel zur Schreibwalze 6 verstellt. In Fig. 2 befinden sich die Lagerrahmen 27 in ihrer Ruhestellung und üben deshalb auf die Endlosbahn 20 keine Friktionskräfte aus.Below the platen roller 6 there are pressure roller groups 24 and 25, which each have several pairs of rollers 26. Each of the pressure roller groups 24 and 25 is mounted on a separate bearing frame 27 (made of plastic) which is adapted to the curvature of the connecting piece 4. All bearing frames 27 are adjusted from a rest position into an operating position or vice versa parallel to the platen roller 6 by a common adjusting member 28. 2, the bearing frames 27 are in their rest position and therefore do not exert any frictional forces on the endless track 20.

Für die Funktion "Einzelblatt, Endlosbahn ohne Perforationsrand und automatische Blattzuführung" (Fig. 3) wird nunmehr das Verstellorgan 28 betätigt, wodurch ein Einzelblatt 29 durch den Einzelblattschacht 30 über die Friktionskräfte der Rollenpaare 26 an die Schreibwalze 6 gedrückt werden.For the function "single sheet, endless web without perforation edge and automatic sheet feed" (FIG. 3), the adjusting member 28 is now actuated, whereby a single sheet 29 is pressed through the single sheet shaft 30 via the frictional forces of the roller pairs 26 onto the platen roller 6.

Nachfolgend werden die Lagerrahmen 27, ihre Betätigungsmittel und ihre Montage näher beschrieben. Wie Fig. 1 zeigt, werden die Lagerrahmen 27 bei aus dem Druckerrahmen 1 ausgebauter Schreibwalze 6 in Öffnungen 31 eingesetzt. Selbstverständlich kann bei der Erstmontage der Einbau der Lagerrahmen 27 vor Einbau der Schreibwalze 6 erfolgen. Das gemeinsame Verstellorgan 28 wird durch eine D-Achse 28a gebildet, die durch Ausnehmungen 32 verlaufen. Der Lagerrahmen 27 bildet diese Ausnehmungen 32 durch links und rechts der D-Achse 28a an Stegwänden 33 senkrecht verlaufenden Führungsholmen 34 und 35. An der Außenseite der Seitenplatine 2 oder der Seitenplatine 3 ist die D-Achse 28a an einen Stellhebel 36 angeschlossen. Der Stellhebel 36 weist ein zapfenförmiges Endes 36a auf, das in einer schräg nach oben verlaufenden Ausnehmung 37 geführt ist. Die D-Achse 28a selbst ist in Langlöchern 38 in den Seitenplatinen 2 und 3 geführt, in denen der D-Querschnitt auf unterschiedliche Höhenlagen, d.h. gemäß Fig. 2 auf eine untere Lage und gemäß Fig. 3 auf eine obere Lage gleitet.The bearing frame 27, its actuating means and its assembly are described in more detail below. 1 shows, the bearing frames 27 are inserted into openings 31 when the platen roller 6 is removed from the printer frame 1. Of course, during the initial assembly, the mounting of the bearing frame 27 can take place before the platen roller 6 is installed. The common adjusting member 28 is formed by a D-axis 28a, which run through recesses 32. The bearing frame 27 forms these recesses 32 through left and right of the D-axis 28a on web walls 33 vertically extending guide rails 34 and 35. On the outside of the side plate 2 or the side plate 3, the D-axis 28a is connected to an adjusting lever 36. The adjusting lever 36 has a peg-shaped end 36a, which is guided in an obliquely upward recess 37. The D axis 28a itself is guided in elongated holes 38 in the side plates 2 and 3, in which the D cross section slides to different heights, ie to a lower layer according to FIG. 2 and to an upper layer according to FIG. 3.

Die einzelnen Rollenpaare 26 sind mittels einer Flachfeder 39 durch Öffnungen 40 ragend so drehgelagert, daß sie an der oberen Lagerrahmenseite 27a radial nachgiebig vorstehen und zusammen mit dem Lagerrahmen 27 als eine Einheit (Fig. 1) ein- oder ausgebaut werden können. Die Stegwände 33 tragen hierbei Rastarme 41 (Fig. 1), die quer zur Führungsrichtung des Druckkopfschlittens 22 federnd schwenkbar sind.The individual pairs of rollers 26 are rotatably supported by means of a flat spring 39 projecting through openings 40 in such a way that they protrude radially resiliently on the upper bearing frame side 27a and can be installed or removed together with the bearing frame 27 as a unit (FIG. 1). The web walls 33 in this case carry latching arms 41 (FIG. 1) which can be resiliently pivoted transversely to the guide direction of the print head carriage 22.

Nach Einbau der Lagerrahmen 27 erfolgt der Andruck der Rollenpaare 26 mit gleichmäßiger Kraftverteilung auf alle Rollen gegen die Schreibwalze 6. Unebenheiten und unterschiedliche Dicken im Papier sowie Rundlauftoleranzen der Schreibwalze 6 und der Rollenpaare 26 werden durch die federnde Eigenbewegung der Rollenpaare 26 ausgeglichen. Die Rollenachsen bleiben hierbei parallel zur Schreibwalze 6.After installation of the bearing frame 27, the roller pairs 26 are pressed against the platen roller 6 with uniform force distribution on all rollers. Unevenness and different thicknesses in the paper as well as concentricity tolerances of the platen roller 6 and the roller pairs 26 are compensated for by the resilient inherent movement of the roller pairs 26. The roller axes remain parallel to the platen roller 6.

Claims (5)

1. Vorrichtung zum Transportieren von Aufzeichnungsträgern in Druckern, insbesondere in Matrixdruckern, in der Einzelblätter oder wechselweise Endlosbahnen mit und ohne Randlochung verarbeitbar sind, wobei einem Schreibwiderlager ein Traktorpaar für Endlosbahnen und angetriebene und antriebslose Andrückrollen bzw. Andrückrollenpaare zugeordnet sind,
dadurch gekennzeichnet,
daß eine oder mehrere jeweils aus mehreren Rollenpaaren (26) bestehende Andruckrollengruppen (24,25) vorgesehen sind, daß jede Andruckrollengruppe (24,25) an einem eigenen Lagerrahmen (27) angeordnet ist und daß die Lagerrahmen (27) mittels eines gemeinsamen Verstellorgans (28) aus einer Ruhestellung in eine Betriebsstellung oder umgekehrt parallel zur Schreibwalze (6) verstellbar sind.1.Device for transporting record carriers in printers, in particular in matrix printers, in which single sheets or alternately continuous webs with and without edge perforation can be processed, a tractor abutment for endless webs and driven and non-driven pressure rollers or pressure roller pairs being assigned to a writing abutment,
characterized,
that one or more pressure roller groups (24, 25) each consisting of a plurality of pairs of rollers (26) are provided, that each pressure roller group (24, 25) is arranged on its own bearing frame (27) and that the bearing frames (27) by means of a common adjusting member ( 28) are adjustable from a rest position into an operating position or vice versa parallel to the platen roller (6). 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Lagerrahmen (27) jeweils bei aus dem Druckerrahmen (1) ausgebauter Schreibwalze (6) durch Öffnungen (31) des Druckerrahmens (1 einsetzbar und rastbar bzw. entriegelbar und ausbaubar sind.2. Device according to claim 1,
characterized,
that the bearing frames (27) can be inserted and latched or unlocked and removed when the platen roller (6) is removed from the printer frame (1) through openings (31) in the printer frame (1). 3. Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das gemeinsame Verstellorgan (28) aus einer in den Seitenplatinen (2,3) des Druckerrahmens (1) gelagerten drehbaren D-Achse (28a) besteht, die jeweils durch Ausnehmungen (32) der Lagerrahmen (27) verläuft.3. Device according to claim 1 or 2,
characterized,
that the common adjusting member (28) consists of a rotatable D-axis (28a) mounted in the side plates (2, 3) of the printer frame (1), each of which runs through recesses (32) in the bearing frame (27). 4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß an der Außenseite der Seitenplatine (2,3) ein mit der D-Achse (28a) verbundener Stellhebel (36) vorgesehen ist, dessen zapfenförmiges Ende (36a) in einer schräg nach oben verlaufenden Ausnehmung (37) geführt ist.4. The device according to one or more of claims 1 to 3,
characterized,
that on the outside of the side plate (2, 3) there is provided an adjusting lever (36) connected to the D-axis (28a), the peg-shaped end (36a) of which is guided in an obliquely upwardly extending recess (37). 5. Vorrichtung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß in dem Lagerrahmen (27) die einzelnen Rollenpaare (26) mittels einer Flachfeder (39) durch Öffnungen (40) der oberen Lagerrahmenseite (27a) vorstehend radial nachgiebig gelagert sind.5. Device according to claims 1 to 4,
characterized,
that in the bearing frame (27) the individual pairs of rollers (26) are supported radially resiliently above by means of a flat spring (39) through openings (40) in the upper side of the bearing frame (27a).
EP87730123A 1987-10-08 1987-10-08 Record carrier transport device for a matrix printer Expired - Lifetime EP0310731B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT87730123T ATE77067T1 (en) 1987-10-08 1987-10-08 DEVICE FOR TRANSPORTING RECORDING CARRIERS IN PRINTERS, ESPECIALLY IN MATRIX PRINTERS.
DE8787730123T DE3779757D1 (en) 1987-10-08 1987-10-08 DEVICE FOR TRANSPORTING RECORD CARRIERS IN PRINTERS, ESPECIALLY IN MATRIX PRINTERS.
EP87730123A EP0310731B1 (en) 1987-10-08 1987-10-08 Record carrier transport device for a matrix printer
US07/256,049 US4936696A (en) 1987-10-08 1988-10-11 Roller device for transporting recording supports in printers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87730123A EP0310731B1 (en) 1987-10-08 1987-10-08 Record carrier transport device for a matrix printer

Publications (2)

Publication Number Publication Date
EP0310731A1 true EP0310731A1 (en) 1989-04-12
EP0310731B1 EP0310731B1 (en) 1992-06-10

Family

ID=8198366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730123A Expired - Lifetime EP0310731B1 (en) 1987-10-08 1987-10-08 Record carrier transport device for a matrix printer

Country Status (4)

Country Link
US (1) US4936696A (en)
EP (1) EP0310731B1 (en)
AT (1) ATE77067T1 (en)
DE (1) DE3779757D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358192A2 (en) * 1988-09-06 1990-03-14 Seiko Epson Corporation Sheet feeding device in a printer
GB2224976A (en) * 1988-11-15 1990-05-23 Seikosha Kk Varying nip pressure between paper feeding rollers
EP0399629A2 (en) * 1989-05-22 1990-11-28 MANNESMANN Aktiengesellschaft Paper feed in a matrix printer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356295A (en) * 1993-03-08 1994-10-18 Grosz Claudia M Anatomical teaching tool and method for teaching anatomy
US6435746B2 (en) * 1997-03-12 2002-08-20 Encad, Inc. Pinch roller for inkjet printer
US5938356A (en) * 1997-03-12 1999-08-17 Encad, Inc. Pinch roller for inkjet printer
JP4995932B2 (en) * 2010-03-12 2012-08-08 株式会社沖データ Printing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971816C (en) * 1950-11-28 1959-04-02 Adlerwerke Kleyer Ag H Paper guidance on office machines, in particular typewriters
US4215945A (en) * 1978-12-26 1980-08-05 International Business Machines Corporation Paper feeding apparatus
EP0026890A2 (en) * 1979-10-09 1981-04-15 Teletype Corporation Paper drive mechanism for a printer
US4486108A (en) * 1980-11-06 1984-12-04 Ricoh Company Ltd. Semi-automatic paper insertion apparatus
US4500023A (en) * 1981-08-20 1985-02-19 Epson Corporation Paper feeding apparatus for printers

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1004569A (en) * 1907-11-30 1911-10-03 Royal Typewriter Co Inc Writing-machine.
US1207628A (en) * 1914-03-30 1916-12-05 Woodstock Typewriter Co Paper-feed mechanism.
US1182352A (en) * 1914-09-09 1916-05-09 Underwood Typewriter Co Type-writing machine.
US1496876A (en) * 1920-12-13 1924-06-10 O D Jennings & Company Combined paper-feed and finger-releasing mechanism
US1988189A (en) * 1931-09-23 1935-01-15 Underwood Elliott Fisher Co Typewriting machine
NL40386B (en) * 1932-01-02
US2328146A (en) * 1941-08-08 1943-08-31 L C Smith & Corona Typewriters Typewriting machine
US2807347A (en) * 1954-01-12 1957-09-24 Standard Register Co Strip feeding mechanism
US4364683A (en) * 1981-12-23 1982-12-21 International Business Machines Corporation Paper feed roller assembly for a typewriter or printer
DE3226510C2 (en) * 1982-07-15 1984-07-12 Siemens AG, 1000 Berlin und 8000 München Universal paper transport device for single sheets and continuous paper in line printing devices
JPS59104971A (en) * 1982-12-09 1984-06-18 Canon Inc Printer
JPS59209165A (en) * 1983-05-13 1984-11-27 Yokogawa Hokushin Electric Corp Recorder
US4592670A (en) * 1984-06-29 1986-06-03 International Business Machines Corporation Angular motion paper feed release system
JPS62193862A (en) * 1986-02-21 1987-08-26 Tokyo Electric Co Ltd Paper feeder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971816C (en) * 1950-11-28 1959-04-02 Adlerwerke Kleyer Ag H Paper guidance on office machines, in particular typewriters
US4215945A (en) * 1978-12-26 1980-08-05 International Business Machines Corporation Paper feeding apparatus
EP0026890A2 (en) * 1979-10-09 1981-04-15 Teletype Corporation Paper drive mechanism for a printer
US4486108A (en) * 1980-11-06 1984-12-04 Ricoh Company Ltd. Semi-automatic paper insertion apparatus
US4500023A (en) * 1981-08-20 1985-02-19 Epson Corporation Paper feeding apparatus for printers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358192A2 (en) * 1988-09-06 1990-03-14 Seiko Epson Corporation Sheet feeding device in a printer
EP0358192A3 (en) * 1988-09-06 1990-07-18 Seiko Epson Corporation Sheet feeding device in a printer
EP0566159A2 (en) * 1988-09-06 1993-10-20 Seiko Epson Corporation Sheet feeding device in a printer
EP0566159A3 (en) * 1988-09-06 1994-05-18 Seiko Epson Corp Sheet feeding device in a printer
GB2224976A (en) * 1988-11-15 1990-05-23 Seikosha Kk Varying nip pressure between paper feeding rollers
GB2224976B (en) * 1988-11-15 1993-02-17 Seikosha Kk Feed device for feeding paper or other record material
EP0399629A2 (en) * 1989-05-22 1990-11-28 MANNESMANN Aktiengesellschaft Paper feed in a matrix printer
EP0399629A3 (en) * 1989-05-22 1991-01-23 MANNESMANN Aktiengesellschaft Paper feed in a matrix printer

Also Published As

Publication number Publication date
US4936696A (en) 1990-06-26
ATE77067T1 (en) 1992-06-15
EP0310731B1 (en) 1992-06-10
DE3779757D1 (en) 1992-07-16

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