EP0111702A2 - Paper introduction devices with slewable paper transport shaft - Google Patents

Paper introduction devices with slewable paper transport shaft Download PDF

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Publication number
EP0111702A2
EP0111702A2 EP83110924A EP83110924A EP0111702A2 EP 0111702 A2 EP0111702 A2 EP 0111702A2 EP 83110924 A EP83110924 A EP 83110924A EP 83110924 A EP83110924 A EP 83110924A EP 0111702 A2 EP0111702 A2 EP 0111702A2
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EP
European Patent Office
Prior art keywords
paper
spring wire
lever
transport shaft
feed device
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
EP83110924A
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German (de)
French (fr)
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EP0111702A3 (en
EP0111702B1 (en
Inventor
Rudolf Rekewitz
Hermann Ing. Grad. Wambach
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Siemens AG
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Siemens AG
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Publication of EP0111702A2 publication Critical patent/EP0111702A2/en
Publication of EP0111702A3 publication Critical patent/EP0111702A3/en
Application granted granted Critical
Publication of EP0111702B1 publication Critical patent/EP0111702B1/en
Expired legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices 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
    • B41J13/02Rollers
    • B41J13/036Rollers co-operating with a roller platen

Definitions

  • the invention relates to a paper feed device according to the preamble of patent claim 1.
  • DE-PS 30 14 340 describes a device for pressing and lifting a paper transport shaft from a typewriter of a typewriter, in which the paper transport shaft mounted on one side can be pivoted away from the typewriter for the purpose of transporting perforated paper by means of a latching device.
  • the transport shaft with the transport roller arranged on it is in contact with the paper roller.
  • such a device now has the disadvantage that it makes it possible to pivot the paper transport shaft in and out as such, but not to change the pressing force of the paper pressure roller mounted on the paper transport shaft depending on the type of paper used.
  • the pressure force of the paper roll must be increased the paper roller can be adapted to the different recording media to ensure safe and trouble-free operation of the printing device.
  • the object of the invention is to design a paper feed device of the type mentioned in such a way that when using different recording media, such as continuous paper, continuous paper with carbon copies, a simple change in position or adjustment of the pressure force of the paper transport shaft is possible.
  • the device should be designed to be fault-prone and simple.
  • the paper feed device can be adapted particularly easily to different recording media. Due to the movable mounting of the spring wire lever on the paper transport shaft, the pressure of the paper pressure rollers on the paper roller is evened out. The paper pressure rollers can align themselves.
  • a bearing piece can be arranged according to a preferred embodiment of the invention between the paper transport shaft and the spring wire bracket, which has a guide recess receiving the end of the spring wire bracket for the movable tip bearing of the bearing piece has on the spring wire bracket.
  • the spring wire arch itself can have a / sliding head made of abrasion-resistant material, or in the guide recess of the bearing piece there is a steel ball on which the end of the spring wire sits.
  • a loop-shaped curvature of the spring wire clip in the area of the bearing piece also reduces the surface pressure and thus the wear.
  • the embodiment of the paper feed device shown in FIG. 1 with a plurality of paper pressure rollers contains a paper roller 1 with an associated paper feed channel 2 and paper pressure rollers 3 arranged below the paper feed channel and supported on a shaft 4.
  • Four paper pressure rollers are mounted on the shaft 4, but only two are shown in the figure.
  • the shaft 4 itself is guided on a bearing piece 5, which is mounted in the manner of a tip bearing via a guide recess 6 on an arm of a spring wire bracket 7.
  • the tip storage on the end of the spring wire bracket 7 has the task of ensuring an equalization of the pressure of the four paper pressure rollers 3 on the paper roll 1.
  • the spring wire lever 7 is in turn guided in guides 8 of a frame of the printing device, not shown here.
  • a rotatably mounted swivel lever 9 consisting of a handle 10 and an extension 11 arranged opposite the handle rests on an arm 12 of the spring wire lever.
  • the arm 12 can be curved like a backdrop so that by rotating the pivot lever 9 the extension 11 deflects the arm 12 and thus the spring wire bracket 7 to different extents.
  • the paper pressure rollers 3 abut against the paper roller 1, their pressure on the paper roller thus changes by turning the pivot lever 9, the spring wire lever being loaded with its spring wire body for torsion. If the pivot lever 9 is brought into the position shown in dashed lines, the spring wire lever 7 is relieved and the paper pressure rollers 3 are thus pivoted away from the paper roller 1.
  • Such a pivoting of the paper pressure rollers 3 and thus a release of the paper feed channel 2 is necessary if, for example, the paper, not shown here, is to be aligned on the paper roll 1.
  • a steel ball 14 can be arranged between the end 13 of the spring wire lever and the actual plastic bearing piece 5. It prevents the spring wire clip 13 from penetrating into the soft plastic and serves as the actual bearing element.
  • the end 13 of the spring wire bracket can be hemispherical (reference number 16) as shown in FIG. 6.
  • This hemispherical configuration of the end 13 of the spring wire clip can also be achieved by fitting an abrasion-resistant hemispherical guide sleeve 17 (FIG. 7).
  • the guide sleeve 17 increases the contact surface of the LaT ger Federationes 5 on the spring wire lever 7, which in turn reduces the surface pressure.
  • a paper transport shaft 18 is used in a printing device for continuous paper, which is only shown here in part, which is fixed at one end and radially movable at its other end, and which has only a single barrel-shaped paper pressure roller 19, it can the axially movable end of the paper transport shaft 18, which is not shown here in connection via a gear with the motor-driven paper roller 1, can be mounted directly on the loop-shaped arm 20 of the frame-supported spring wire lever 7.
  • the spring wire lever 7 is mounted on the one hand on a guide 8 fixed to the frame, on the other hand it spirally wraps around the other end of a guide piece 21 which forms the axis of the pivot lever 9. 2, part of the spring wire lever 13.
  • the area that wraps around the guide piece 21 serves as an additional resilient element to support the torsional action of the spring wire bracket body.
  • the central position of the pivot lever corresponds to the first pressure position of the paper pressure roller 19, the left locking position (dashed), a position of the paper pressure roller 19 pivoted away from the paper roller 1, and the position of the swivel lever shown in dashed lines to the right of the central position, a rest position with increased pressure of the paper pressure roller on the paper roller.
  • Such a variation of the pressure force of the paper pressure roller on the paper roll 1 can e.g. be necessary if you want to use paper of different thickness and different formats (e.g. single sheet and continuous paper) in the printing device.

Landscapes

  • Handling Of Cut Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

Die Papiertransportwelle einer Papiereinzugsvorrichtung ist auf einem Arm eines gehäusegestützten Federdrahthebels beweglich gelagert. Der andere Arm befindet sich im Verschwenkungsbereich eines Schwenkhebels, so daß abhänging vom Verschwenken des Verschwenkhebels und damit durch Torsion des Federdrahtkörpers des Federdrahthebels die Andruckkraft einer auf der Papiertransportwelle gelagerten Papierandruckrolle an die Papierwalze verändert wird bzw. die Papiertransportwelle abgeschwenkt werden kann.The paper transport shaft of a paper feed device is movably supported on an arm of a housing-supported spring wire lever. The other arm is located in the pivoting area of a pivoting lever, so that depending on the pivoting of the pivoting lever and thus by torsion of the spring wire body of the spring wire lever, the pressing force of a paper pressure roller mounted on the paper transport shaft on the paper roll is changed or the paper transport shaft can be pivoted away.

Description

Die Erfindung betrifft eine Papiereinzugsvorriehtung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a paper feed device according to the preamble of patent claim 1.

Bei Papiereinzugsvorrichtungen der eingangs genannten Art ist es allgemein bekannt, die Papiertransportwelle abschwenkbar auszugestalten, um das Einlegen des Papiers in die Druckeinrichtung zu erleichtern bzw. um das Papier in der Druckeinrichtung justieren zu können. So wird in der DE-PS 30 14 340 eine Einrichtung zum Andrücken und Abheben einer Papiertransportwelle von einer Schreibwalze einer Schreibmaschine beschrieben, bei der mittels einer Rasteinrichtung die einseitig gelagerte Papiertransportwelle zum Zwecke des Transportes von randperforiertem Papier von der Schreibwalze abgeschwenkt werden kann. Bei der Benutzung von nicht randgelochtem Endlospapier befindet siah die Transportwelle mit der darauf angeordneten Transportrolle in Anlage an der Papierwalze.In the case of paper feed devices of the type mentioned at the outset, it is generally known to make the paper transport shaft pivotable in order to facilitate the insertion of the paper into the printing device or to be able to adjust the paper in the printing device. DE-PS 30 14 340 describes a device for pressing and lifting a paper transport shaft from a typewriter of a typewriter, in which the paper transport shaft mounted on one side can be pivoted away from the typewriter for the purpose of transporting perforated paper by means of a latching device. When using continuous paper that is not punched with edges, the transport shaft with the transport roller arranged on it is in contact with the paper roller.

Neben dem komplizierten Aufbau hat nun eine derartige Vorrichtung den Nachteil, daß damit zwar ein An- und Abschwenken der Papiertransportwelle als solche möglich wird, nicht jedoch eine Veränderung der Andruckkraft der auf der Papiertransportwelle gelagerten Papierandruckrolle in Abhängigkeit von der verwendeten Papiersorte.In addition to the complicated structure, such a device now has the disadvantage that it makes it possible to pivot the paper transport shaft in and out as such, but not to change the pressing force of the paper pressure roller mounted on the paper transport shaft depending on the type of paper used.

Werden mit Papiereinzugsvorrichtungen der eingangs genannten Art unterschiedliche Aufzeichnungsträger, z.B. mit Endlospapier, Endlospapier mit Durchschlägen und Einzelblättern betrieben, so muß die Andruckkraft der Papierrolle an die Papierwalze den unterschiedlichen Aufzeichnungsträgern angepaßt werden, um einen sicheren und störungsfreien Betrieb der Druckeinrichtung zu gewährleisten.If different recording media are used with paper feed devices of the type mentioned at the beginning, for example with continuous paper, continuous paper with carbon copies and single sheets, the pressure force of the paper roll must be increased the paper roller can be adapted to the different recording media to ensure safe and trouble-free operation of the printing device.

Aufgabe der Erfindung ist es, eine Papiereinzugsvorrichtung der eingangs genannten Art so auszugestalten, daß bei der Verwendung von unterschiedlichen Aufzeichnungsträgern,wie Endlospapier, Endlospapier mit Durchschlägen, eine einfache Lageveränderung bzw. Anpassung der Andruckkraft der Papiertransportwelle möglich ist. Die Vorrichtung soll stö- r.ungsanfällig und einfach ausgestaltet sein.The object of the invention is to design a paper feed device of the type mentioned in such a way that when using different recording media, such as continuous paper, continuous paper with carbon copies, a simple change in position or adjustment of the pressure force of the paper transport shaft is possible. The device should be designed to be fault-prone and simple.

Diese Aufgabe wird bei einer Papiereinzugsvorrichtung der eingangs genannten Art gemäß dem kennzeichnenden Teil des ersten Patentanspruches gelöst.This object is achieved in a paper feed device of the type mentioned at the outset in accordance with the characterizing part of the first claim.

Weitere vorteilhafte Ausführungsformen sind in den Unteransprüchen gekennzeichnet.Further advantageous embodiments are characterized in the subclaims.

Dadurch, daß das Federelement zum Andrücken der Papierandruckrolle an die Papierwalze ein Federdrahthebel der auf Torsion belastet ist, verwendet wird, kann die Anpassung der Papierein-zugsvorrichtung an verschiedene Aufzeichnungsträger besonders einfach vorgenommen werden. Durch die bewegliche Lagerung des Federdrahthebels an der Papiertransportwelle wird eine Vergleichmäßigung des Andruckers der Papierandruckrollen an der Papierwalze erreicht. Die Papierandruckrollen können sich dabei selbständig ausrichten.Because the spring element is used to press the paper pressure roller against the paper roll using a spring wire lever which is subjected to torsion, the paper feed device can be adapted particularly easily to different recording media. Due to the movable mounting of the spring wire lever on the paper transport shaft, the pressure of the paper pressure rollers on the paper roller is evened out. The paper pressure rollers can align themselves.

Um bei der Verwendung von mehreren Papiertransportrollen auf einer Papiertransportwelle diese ausgleichende Wirkung noch zu unterstützen, kann gemäß einer bevorzugten Ausführungsform der Erfindung zwischen der Papiertransportwelle und dem Federdrahtbügel ein Lagerstück angeordnet sein, das eine das Ende des Federdrahtbügels aufnehmende Führungsausnehmung zur beweglichen Spitzenlagerung des Lagerstückes auf dem Federdrahtbügel aufweist.In order to further support this compensating effect when using a plurality of paper transport rollers on a paper transport shaft, a bearing piece can be arranged according to a preferred embodiment of the invention between the paper transport shaft and the spring wire bracket, which has a guide recess receiving the end of the spring wire bracket for the movable tip bearing of the bearing piece has on the spring wire bracket.

Um den Verschleiß im Lagerstück zu verringern, sind verschiedene Maßnahmen möglich, z.B. kann der Federdrahtbüen gel selbst ein/Gleitkopf aus abreibfestem Material aufweisen, oder in der Führungsausnehmung des Lagerstückes befindet sich eine Stahlkugel,auf der das Ende des Federdrahts aufsitzt.Various measures are possible to reduce wear in the bearing piece, e.g. the spring wire arch itself can have a / sliding head made of abrasion-resistant material, or in the guide recess of the bearing piece there is a steel ball on which the end of the spring wire sits.

Auch eine schlaufenförmige Krümmung des Federdrahtbügels im Bereich des Lagerstückes verringert den Flächendruck und damit den Verschleiß.A loop-shaped curvature of the spring wire clip in the area of the bearing piece also reduces the surface pressure and thus the wear.

Ausführungsformen der-Erfindung sind in den Zeichnungen dargestellt und werden im folgenden beispielsweise näher beschrieben. Es zeigen

  • Fig. 1 eine schematische Darstellung einer Papiereinzugsvorrichtung mit mehreren Papierandruckrollen,
  • Fig. 2 eine schematische Darstellung einer Papiereinzugsvorrichtung-mit nur einer Papierandruckrolle, die auf einer einseitig gelagerten Papiertransportwelle geführt ist,
  • Fig. 3 bis 7 Schnittdarstellungen verschiedener Ausführungsformen des zwischen Federdrahtbügel und Papiertransportwelle anordbaren Lagerstückes.
Embodiments of the invention are illustrated in the drawings and are described in more detail below, for example. Show it
  • 1 is a schematic representation of a paper feed device with several paper pressure rollers,
  • 2 shows a schematic representation of a paper feed device with only one paper pressure roller which is guided on a paper transport shaft mounted on one side,
  • 3 to 7 are sectional views of different embodiments of the bearing piece which can be arranged between the spring wire clip and the paper transport shaft.

Die in der Fig. 1 dargestellte Ausführungsform der Papiereinzugsvorrichtung mit mehreren Papierandruckrollen, enthält eine Papierwalze 1 mit zugeordnetem Papierzuführungskanal 2 und unterhalb des Papierzuführungskanals angeordneten Papierandruckrollen 3, die auf einer Welle 4 gelagert sind. Auf der Welle 4 sind vier Papierandruckrollen gelagert, in der Fig. sind jedoch nur zwei dargestellt. Die Welle 4 selber wiederum ist auf einem Lagerstück 5 geführt, das in der Art einer Spitzenlagerung über eine Führungsausnehmung 6 auf einem Arm eines Federdrahtbügels 7 gelagert ist. Die Spitzenlagerung auf dem Ende des Federdrahtbügels 7 hat dabei die Aufgabe, für eine Vergleichmäßigung des Andruckes der vier Papierandruckrollen 3 an der Papierwalze 1 zu sorgen. Der Federdrahthebel 7 wiederum ist in Führungen 8 eines hier nicht dargestellten Gestelles der Druckeinrichtung geführt. Ein drehbar gelagerter Schwenkhebel 9 aus einem Griffstück 10 und einem dem Griffstück gegenüber angeordneten Ansatzstück 11 liegt auf einem Arm 12 des Federdrahthebels auf. Der Arm 12 kann kulissenartig so gebogen sein, daß durch Drehen des Schwenkhebels 9 das Ansatzstück 11 den Arm 12 und damit den Federdrahtbügel 7 verschieden stark auslenkt. Bei der Anlage der Papierandruckrollen 3 an der Papierwalze 1 verändert sich somit durch Drehen des Schwenkhebels 9 deren Andruck an der Papierwalze, wobei der Federdrahthebel mit seinem Federdrahtkörper auf Torsion belastet wird. Bringt man den Schwenkhebel 9 in die gestrichelt dargestellte Position, so ist der Federdrahthebel 7 entlastet und damit die Papierandruckrollen 3 von der Papierwalze 1 abgeschwenkt. Ein derartiges Abschwenken der Papierandruckrollen 3 und damit eine Freigabe des Papierzuführungskanals 2 ist notwendig, wenn z.B. das hier nicht dargestellte Papier auf der Papierwalze 1 ausgerichtet werden soll.The embodiment of the paper feed device shown in FIG. 1 with a plurality of paper pressure rollers contains a paper roller 1 with an associated paper feed channel 2 and paper pressure rollers 3 arranged below the paper feed channel and supported on a shaft 4. Four paper pressure rollers are mounted on the shaft 4, but only two are shown in the figure. The The shaft 4 itself is guided on a bearing piece 5, which is mounted in the manner of a tip bearing via a guide recess 6 on an arm of a spring wire bracket 7. The tip storage on the end of the spring wire bracket 7 has the task of ensuring an equalization of the pressure of the four paper pressure rollers 3 on the paper roll 1. The spring wire lever 7 is in turn guided in guides 8 of a frame of the printing device, not shown here. A rotatably mounted swivel lever 9 consisting of a handle 10 and an extension 11 arranged opposite the handle rests on an arm 12 of the spring wire lever. The arm 12 can be curved like a backdrop so that by rotating the pivot lever 9 the extension 11 deflects the arm 12 and thus the spring wire bracket 7 to different extents. When the paper pressure rollers 3 abut against the paper roller 1, their pressure on the paper roller thus changes by turning the pivot lever 9, the spring wire lever being loaded with its spring wire body for torsion. If the pivot lever 9 is brought into the position shown in dashed lines, the spring wire lever 7 is relieved and the paper pressure rollers 3 are thus pivoted away from the paper roller 1. Such a pivoting of the paper pressure rollers 3 and thus a release of the paper feed channel 2 is necessary if, for example, the paper, not shown here, is to be aligned on the paper roll 1.

Entsprechend den Darstellungen der Fig.'3 bis 7 sind nun für die Ausgestaltung des Lagerstücks 5 mit seiner konisch verlaufenden Führungsausnehmung 6 verschiedene Ausführungsformen denkbar. So kann z.B. wie Fig. 3 zwischen dem Ende 13 des Federdrahthebels und dem eigentlichen aus Kunststoff bestehenden Lagerstück 5,eine Stahlkugel 14 angeordnet sein. Sie verhindert ein Eindringen des Federdrahtbügels 13 in den weichen Kunststoff und dient als eigentliches Lagerelement.According to the representations of FIGS. 3 to 7, different embodiments are now conceivable for the configuration of the bearing piece 5 with its conical guide recess 6. For example, 3, a steel ball 14 can be arranged between the end 13 of the spring wire lever and the actual plastic bearing piece 5. It prevents the spring wire clip 13 from penetrating into the soft plastic and serves as the actual bearing element.

Bildet man entsprechend der Darstellung der Fig. 5 das Ende 15 des Federdrahthebels schlaufenförmig aus, so verringert sich die Pressung zwischen dem schlaufenförmigen Ende und dem eigentlichen Lagerstück 5. Dies verringert den Verschleiß zwischen dem Ende 13 und dem Lagerstück 5.5, if the end 15 of the spring wire lever is loop-shaped, the pressure between the loop-shaped end and the actual bearing piece 5 is reduced. This reduces the wear between the end 13 and the bearing piece 5.

Selbstverständlich ist es auch möglich, entsprechend den Darstellungen der Fig. 4, 6 und 7 das Lagerstück 5 selbst aus abriebfestem Material herzustellen. Dies ermöglicht den,in der Fig. 4 dargestellt, einen direkten Kontakt zwischen dem Ende 13 des Federdrahthebels und dem Lagerstück 5.Of course, it is also possible, according to the representations of FIGS. 4, 6 and 7, to manufacture the bearing piece 5 itself from abrasion-resistant material. This enables, as shown in FIG. 4, direct contact between the end 13 of the spring wire lever and the bearing piece 5.

Um das Lagerstück, und damit die darauf gelagerten Papierandruckrollen 3 allseitig schwenken zu können, kann das Ende 13 des Federdrahtbügels entsprechend der Darstellung der Fig. 6 halbkugelig (Bezugszeichen 16) ausgebildet sein.In order to be able to pivot the bearing piece, and thus the paper pressure rollers 3 mounted thereon, on all sides, the end 13 of the spring wire bracket can be hemispherical (reference number 16) as shown in FIG. 6.

Diese halbkugelige Ausgestaltung des Endes 13.des Federdrahtbügels, kann auch durch Aufsetzen einer abriebfesten halbkugeligen Führungshülse 17 (Fig. 7) erreicht werden. Die Führungshülse 17 vergrößert die Auflagefläche des LaT gerstückes 5 auf den Federdrahthebel 7, womit sich wiederum die Flächenpressung verringert.This hemispherical configuration of the end 13 of the spring wire clip can also be achieved by fitting an abrasion-resistant hemispherical guide sleeve 17 (FIG. 7). The guide sleeve 17 increases the contact surface of the LaT gerstückes 5 on the spring wire lever 7, which in turn reduces the surface pressure.

Verwendet man entsprechend der Darstellung Fig. 2 bei einer hier nur auszugsweise dargestellten Druckeinrichtung für Endlospapier eine Papiertransportwelle 18, die an ihrem einen Ende ortsfest und an ihrem anderen Ende radial beweglich gelagert ist, und die nur eine einzige tonnenförmig ausgebildete Papierandruckrolle 19 aufweist, so kann das axial bewegliche Ende der Papiertransportwelle 18, die hier nicht näher dargestellt über ein Getriebe mit der motorisch angetriebenen Papierwalze 1 in Verbindung steht, direkt auf dem schlaufenförmig ausgebildeten Arm 20 des gestellgestützten Federdrahthebels 7 gelagert sein.If, according to the illustration in FIG. 2, a paper transport shaft 18 is used in a printing device for continuous paper, which is only shown here in part, which is fixed at one end and radially movable at its other end, and which has only a single barrel-shaped paper pressure roller 19, it can the axially movable end of the paper transport shaft 18, which is not shown here in connection via a gear with the motor-driven paper roller 1, can be mounted directly on the loop-shaped arm 20 of the frame-supported spring wire lever 7.

Der Federdrahthebel 7 ist dabei einerseits auf einer gestellfesten Führung 8 gelagert, andererseits umschlingt er spiralenförmig mit seinem anderen Ende ein Führungsstück 21, das die Achse des Schwenkhebels 9 bildet. Der Schwenkhebel 9 ist bei der Ausführung entsprechend der Fig. 2, Teil des Federdrahthebels 13. Der das Führungsstück 21 umschlingende Bereich dient dabei als zusätzliches federndes Element zur Unterstützung der Torsionswirkung des Federdrahtbügelkörpers. Versieht man die Kulisse 22 mit drei Rastausnehmungen entsprechend der Darstellung, so entspricht die mittlere,mit ausgezogenen Linien dargestellte Position des Schwenkhebels, der ersten Andruckposition der Papierandruckrolle 19, die linke Rastposition (gestrichelt), einer von der Papierwalze 1 abgeschwenkten Lage der Papierandruckrolle 19, und die rechts von der Mittellage gestrichelt dargestellte Position des Schwenkhebels, einer Rastposition mit erhöhtem Andruck der Papierandruckrolle an die Papierwalze. Eine derartige Variation der Andruckkraft der Papierandruckrolle an der Papierwalze 1, kann z.B. notwendig sein, wenn man Papier verschiedener Stärke und verschiedenen Formats (z.B. Einzelblatt und Endlospapier) in der Druckeinrichtung verwenden will.The spring wire lever 7 is mounted on the one hand on a guide 8 fixed to the frame, on the other hand it spirally wraps around the other end of a guide piece 21 which forms the axis of the pivot lever 9. 2, part of the spring wire lever 13. The area that wraps around the guide piece 21 serves as an additional resilient element to support the torsional action of the spring wire bracket body. If the setting 22 is provided with three locking recesses as shown, the central position of the pivot lever, shown with solid lines, corresponds to the first pressure position of the paper pressure roller 19, the left locking position (dashed), a position of the paper pressure roller 19 pivoted away from the paper roller 1, and the position of the swivel lever shown in dashed lines to the right of the central position, a rest position with increased pressure of the paper pressure roller on the paper roller. Such a variation of the pressure force of the paper pressure roller on the paper roll 1 can e.g. be necessary if you want to use paper of different thickness and different formats (e.g. single sheet and continuous paper) in the printing device.

Claims (8)

1. Papiereinzugsvorrichtung für Druckeinrichtungen, insbesondere Schreib- oder ähnliche Büromaschinen mit einer Papierwalze und einer an die Papierwalze anschwenkbaren Papiertransportwelle,
dadurch gekennzeichnet, daß die Papiertransportwelle (4,18) auf einem Arm eines gestellgeschützten Federdrahthebels (7) beweglich gelagert ist, dessen anderer Arm mit einem um eine Schwenkachse drehbaren Schwenkhebel (9) derart in Verbindung steht, daß abhängig vom Verschwenken des Verschwenkhebels (9) und damit durch Torsion des Federdrahtkörpers die Andruckkraft einer auf der Papiertransportwelle (4,18) gelagerten Papierandruckrolle (3,19) an die Papierwalze (1) verändert wird.
1. paper feed device for printing devices, in particular typewriters or similar office machines with a paper roller and a paper transport shaft which can be pivoted onto the paper roller,
characterized in that the paper transport shaft (4, 18) is movably mounted on one arm of a frame-protected spring wire lever (7), the other arm of which is connected to a pivot lever (9) which can be rotated about a pivot axis such that, depending on the pivoting of the pivot lever (9 ) and thus by torsion of the spring wire body, the pressure force of a paper pressure roller (3,19) mounted on the paper transport shaft (4,18) against the paper roller (1) is changed.
2. Papiereinzugsvorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der andere, dem Schwenkhebel (9) zugeordnete Arm des Federdrahthebels (7) selbst als verrastbarer Schwenkhebel (9) ausgebildet ist.
2. Paper feed device according to claim 1,
characterized in that the other arm of the spring wire lever (7) associated with the swivel lever (9) is itself designed as a latchable swivel lever (9).
3. Papiereinzugsvorrichtung nach Anspruch 2,
dadurch gekennzeichnet , daß der Federdrahthebel (7) zwischen dem als Schwenkhebel (9) ausgebildeten Teilstück und dem Federdrahtkörepr spiralfederartig die Drehachse (21) des Schwenkhebels (9) umschlingt.
3. Paper feed device according to claim 2,
characterized in that the spring wire lever (7) wraps around the axis of rotation (21) of the pivot lever (9) between the section designed as a pivot lever (9) and the spring wire body in the manner of a spiral spring.
4. Papiereinzugsvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet , daß die Papiertransportwelle (18) in an sich bekannter Weise an ihrem einen Ende ortsfest und an ihrem anderen Ende radial beweglich gelagert ist, und daß das radial bewegliche Ende der Papiertransportwelle (18) in dem einen Arm (20) des gestellgestützten Federdrahthebels (7) gelagert ist.
4. Paper feed device according to one of claims 1 to 3,
characterized in that the paper transport shaft (18) is fixed in a manner known per se at one end and radially movable at its other end, and in that the radially movable end of the paper transport shaft (18) in one arm (20) of the frame-supported spring wire lever (7) is stored.
5. Papiereinzugsvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet , daß zwischen der Papiertransportwelle (3) und dem einen Arm des Federdrahtbügels (7) ein Lagerstück (5) angeordnet ist, das eine, das Ende des Armes aufnehmende Führungsausnehmung (6) zur beweglichen Spitzenlagerung des Lagerstückes (5) auf dem Arm aufweist.
5. Paper feed device according to one of claims 1 to 3,
characterized in that between the paper transport shaft (3) and one arm of the spring wire bracket (7) a bearing piece (5) is arranged, the one, the end of the arm receiving guide recess (6) for the movable tip bearing of the bearing piece (5) on the arm having.
6. Papiereinzugsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß am Ende der Ausnehmung eine Stahlkugel (14) angeordnet ist, auf der der Federdrahtbügel (7) aufsitzt.6. Paper feed device according to claim 5, characterized in that a steel ball (14) is arranged at the end of the recess, on which the spring wire bracket (7) is seated. 7. Papiereinzugsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Federdrahtbügel im Bereich der Führungsausnehmung einen Gleitkopf (16,17) aufweist.7. Paper feed device according to claim 5, characterized in that the spring wire clip has a sliding head (16, 17) in the region of the guide recess. 8. Papiereinzugsvorrichtung nach Anspruch 5,
dadurch gekennzeiehnet, daß der Federdrahtbügel im Bereich der Führungsausnehmung (6) schlaufenförmig (15) umgebogen ist.
8. Paper feed device according to claim 5,
characterized in that the spring wire clip is bent in the form of a loop (15) in the region of the guide recess (6).
EP83110924A 1982-11-05 1983-11-02 Paper introduction devices with slewable paper transport shaft Expired EP0111702B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3240989 1982-11-05
DE3240989 1982-11-05

Publications (3)

Publication Number Publication Date
EP0111702A2 true EP0111702A2 (en) 1984-06-27
EP0111702A3 EP0111702A3 (en) 1985-05-29
EP0111702B1 EP0111702B1 (en) 1987-02-04

Family

ID=6177423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110924A Expired EP0111702B1 (en) 1982-11-05 1983-11-02 Paper introduction devices with slewable paper transport shaft

Country Status (3)

Country Link
US (1) US4537521A (en)
EP (1) EP0111702B1 (en)
DE (1) DE3369661D1 (en)

Cited By (2)

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WO1993021016A1 (en) * 1992-04-16 1993-10-28 International Business Machines Corporation Feed device for media to be moved
DE19525074A1 (en) * 1994-07-11 1996-01-25 Fujitsu Ltd Paper delivery device e.g. for laser printer using continuous paper

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US4651173A (en) * 1984-05-19 1987-03-17 Canon Kabushiki Kaisha Continuous-form recorder having decrumpling means for removing creases in the form
US5393151A (en) * 1993-06-03 1995-02-28 Hewlett-Packard Company Print medium handling system including cockle ribs to control pen-to-print medium spacing during printing
US5419644A (en) * 1993-06-03 1995-05-30 Hewlett-Packard Company Print medium handling system including cockle springs to control pen-to-print medium spacing during printing
KR0185047B1 (en) * 1996-09-17 1999-05-15 김광호 Apparatus for preventing paper jam of a printer
US6152442A (en) * 1997-09-12 2000-11-28 Canon Kabushiki Kaisha Sheet separating and conveying apparatus having friction releasing device to separate convey and friction means
WO2013066946A1 (en) 2011-11-01 2013-05-10 Ellipse Technologies, Inc. Adjustable magnetic devices and methods of using same
JP6408182B1 (en) * 2017-10-18 2018-10-17 ローランドディー.ジー.株式会社 Inkjet printer and inkjet printer with cutting head

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DE3014340A1 (en) * 1980-04-15 1981-10-22 Adlerwerke Vorm. Heinrich Kleyer Ag, 6000 Frankfurt DEVICE FOR PRESSING AND LIFTING A PAPER TRANSPORT SHAFT FROM A TYPE ROLLER OF A TYPEWRITER, A PRINTER OR THE LIKE.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021016A1 (en) * 1992-04-16 1993-10-28 International Business Machines Corporation Feed device for media to be moved
DE19525074A1 (en) * 1994-07-11 1996-01-25 Fujitsu Ltd Paper delivery device e.g. for laser printer using continuous paper
DE19525074C2 (en) * 1994-07-11 1998-01-08 Fujitsu Ltd Paper transport device

Also Published As

Publication number Publication date
EP0111702A3 (en) 1985-05-29
US4537521A (en) 1985-08-27
DE3369661D1 (en) 1987-03-12
EP0111702B1 (en) 1987-02-04

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