EP0332794B1 - Device for feeding paper sheets to the platen of an office machine, particularly of a matrix printer - Google Patents

Device for feeding paper sheets to the platen of an office machine, particularly of a matrix printer Download PDF

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Publication number
EP0332794B1
EP0332794B1 EP88730024A EP88730024A EP0332794B1 EP 0332794 B1 EP0332794 B1 EP 0332794B1 EP 88730024 A EP88730024 A EP 88730024A EP 88730024 A EP88730024 A EP 88730024A EP 0332794 B1 EP0332794 B1 EP 0332794B1
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EP
European Patent Office
Prior art keywords
gear wheel
gear
drive motor
rollers
separating
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP88730024A
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German (de)
French (fr)
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EP0332794A1 (en
Inventor
Günter Engelhardt
Gerhard Lohrmann
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Vodafone GmbH
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Mannesmann AG
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Priority to AT88730024T priority Critical patent/ATE74827T1/en
Publication of EP0332794A1 publication Critical patent/EP0332794A1/en
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Publication of EP0332794B1 publication Critical patent/EP0332794B1/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
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103—Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

Definitions

  • the invention relates to a device for feeding single sheets to the platen of an office machine, in particular a matrix printer, with a plurality of supply shafts, each of which is assigned a separating roller which is rotatably mounted on a fixed axis and is connected to a drive motor via a gear train.
  • a separation device for two opposing supply shafts is also known (UK patent application 2,022,059), in which one only separating roller is arranged between the two storage magazines and can be pivoted into the two separating positions.
  • this system has the disadvantage that the position of the separating roller must be determined precisely after each swiveling operation, because otherwise the contact pressure of the resilient floor on which the stack of sheets rests changes, and thus the separating force.
  • the invention has for its object to provide a safe working shaft selection, which can also be used for larger shaft distances and for larger storage shafts.
  • the drive motor can be driven counterclockwise or clockwise that the drive motor pinion is in engagement with a first gearwheel which carries an eccentrically mounted cam which engages in a rocker arm and in that around a horizontal axis mounted rocker arm is rotatably mounted at least a second gear which is pivotable depending on the direction of rotation of the drive motor in engagement with the respective gear of one of the separating rollers.
  • the respective direction of rotation controls a rocker arm by meshing teeth.
  • the cam arranged on the first gear wheel is mounted between the legs of a spring wire clip.
  • a third gear is rotatably mounted on the rocker arm, which engages with the second gear and also meshes via a gear train with a gear which is arranged on the axis of the pressure roller and that the rocker arm about the horizontal Axis of the third gear is pivotally mounted.
  • a further drive branch is achieved in that a fourth gearwheel is connected to the gear train connecting the third gearwheel with the printing roller in the area of the input edge of a storage compartment for printed single sheets, on the axis of which transport rollers are arranged.
  • the transport of a finished printed single sheet can be additionally supported by assigning a pair of guide rollers at the exit to the printing roller, the guide gap of which, with the transport rollers of the storage compartment, runs approximately on a tangent to the transport rollers.
  • a separation from the other assemblies of a writing office machine is achieved in that at least the storage shafts, the storage compartment, the separating rollers with gearwheels, the drive motor, the rocker arm with gearwheels and the gear train as well as the transport rollers are combined on a frame that can be attached to the pressure roller axis and that the frame can be locked on the printer chassis.
  • the exemplary embodiment shows a matrix printer 1 which has both a tractor 2 for endless webs and a device 3 for feeding single sheets to the printing roller 4 with two supply shafts 5 and 6.
  • the supply shaft 5 is assigned its own separating roller (pair of rollers) 7 and the supply shaft 6 is also assigned its own separating roller 8 (pair of rollers).
  • This first gear 11 carries an eccentrically arranged cam 12 at the position shown, in which a rocker arm 13 is in its neutral (vertical) position .
  • the rocker arm 13 is pivotally mounted about a horizontal axis 14, wherein the horizontal axis 14 can initially be arranged higher than shown.
  • the cam 12 fastened on the first gearwheel 11 is guided between the legs 18a and 18b of a spring wire clasp 18.
  • the second gear wheel 15 is also held with its rotary bearing 19 between these legs 18a and 18b.
  • the spring wire clasp 18 is against changes in position secured by a bracket 20.
  • the spring wire clip 18 is also fixed in its longitudinal direction by lugs 21 and by a shaft pin 22.
  • a third gear 23 can also be rotatably mounted on the horizontal axis 14, which is in constant engagement with the second gear 15.
  • a gear train 24 consisting of intermeshing gears 25, 26, 27, 28, 29, 30, 31 is connected to the third gear 23, the last gear 31 engaging in a gear 32 which is arranged on the axis 33 of the printing roller 4 is.
  • the pivot axis of the rocker arm 13 coincides with the horizontal axis 14 of the third gear 23.
  • a fourth gear 37 is rotatably mounted in the area of the input edge 34, which serves for the transport of (printed) individual sheets 5a or 6a in the storage compartment 36.
  • Transport rollers 35 are arranged on the axis 35a of the fourth gearwheel 37, which cooperate with the respective individual sheet 5a or 6a in a frictionally locking manner.
  • the individual sheets 5a and 6a reach the area of influence of the transport rollers 35, in that the pressure roller 4 is followed by a pair of guide rollers 38 at the outlet 4a, which forms a tangent 40 with its guide gap 39 with the transport rollers 35 of the storage compartment 36.
  • a frame 41 is suspended on the matrix printer 1 on the printing roller axis 33 and locked to the printer chassis 1a by releasable locking means 42.
  • the frame 4 carries the storage compartment 36, the separating rollers 7 and 8 with the toothed wheels 16 and 17, the drive motor 9, the rocker arm 13 with the toothed wheels 11, 15 and 23, the gear train 24 and the transport rollers 37 .
  • Fig. 2 it is shown that the "right-hand drive” of the drive motor 9 Switch rocker 13 is pivoted via the drive motor pinion 10 and the first gear 11 by the cam 12 such that the second gear 15 engages in the gear 17 of the separating roller 8 and thus individual sheets 6a are withdrawn from the supply shaft 6.

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  • Sheets, Magazines, And Separation Thereof (AREA)
  • Handling Of Cut Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Handling Of Sheets (AREA)

Abstract

A device for feeding of individual sheets to a plate (4) of an office machine, in particular of a matrix printer (1), is provided with several storage bins (5, 6). In each case a separating roller (7, 8) is coordinated to the storage bins (5, 6) and the separating roller (7, 8) is connected to a drive motor (9) via a gear train. In order to create a reliably operating storage bin selection, which can be employed for larger distances and for larger-volume storage bins, it is disclosed that the drive motor (9) can be left-hand or right-hand rotatably controlled, that the drive motor pinion (10) engages a first gear wheel (11), that an eccentrically supported cam (12) is carried by the first gear wheel (11), that the cam (12) engages into a switching rocker (13), and that at least a second gear wheel (15) is rotatably supported at the switching rocker (13) supported around a horizontal axle (14), where the second gear wheel ( 15) is tilted, depending on the rotary direction of the drive motor (9), into engagement with the respective gear wheel (16, 17) of one of the separating rollers (7, 8).

Description

Die Erfindung betrifft eine Vorrichtung zum Zuführen von Einzelblättern zur Schreibwalze einer Büromaschine, insbesondere eines Matrixdruckers, mit mehreren Vorratsschächten, denen jeweils eine auf einer ortsfesten Achse drehgelagerte Separierrolle zugeordnet ist, die über einen Getriebezug an einen Antriebsmotor angeschlossen ist.The invention relates to a device for feeding single sheets to the platen of an office machine, in particular a matrix printer, with a plurality of supply shafts, each of which is assigned a separating roller which is rotatably mounted on a fixed axis and is connected to a drive motor via a gear train.

Derartige Vorrichtungen zum Zuführen von Einzelblättern in den Schacht einer Schreibwalze oder eines anders gearteten Druckwiderlagers, setzen in vielen Fällen nur einen Vorratsschacht und ein Ablagefach voraus. Wegen des Abstandes mehrerer Vorratsschächte und wegen der jeweils benötigten Separierrollen können die Lösungen bekannter Vorrichtungen hier nicht verwendet werden.In many cases, such devices for feeding single sheets into the shaft of a platen roller or some other type of platen presuppose only a supply shaft and a storage compartment. Because of the distance between several supply shafts and because of the separation rollers required in each case, the solutions of known devices cannot be used here.

Es ist bekannt (DE-PS 28 56 950), für mehrere Vorratsmagazine jeweils eine Separierrolle vorzusehen. Eine solche Anordnung wird für notwendig erachtet, um die Vereinzelung der Blätter bzw. Formulare sicher zu erzielen. Die Anordnung einer derartigen Separierrollenachse mit mehreren einzelnen Separierrollen an jedem Vorratsschacht ist jedoch auch notwendig, um den Blattstapel in einer leicht geneigten Lage zu halten, in der ein Federnder Boden den jeweils verbleibenden Reststapel in die Separierposition gegen die Separierrollen drückt. Eine solche leicht schräge Lage des Blattstapels ist außerdem aus ergonomischen Gründen vorteilhaft, weil das Bedienungspersonal eine entsprechende Zugänglichkeit bzw. Übersicht über den vorhandenen Blattstapel benötigt.It is known (DE-PS 28 56 950) to provide a separating roller for several storage magazines. Such an arrangement is deemed necessary in order to reliably separate the sheets or forms. However, the arrangement of such a separating roller axis with several individual separating rollers on each supply shaft is also necessary in order to keep the stack of sheets in a slightly inclined position in which a resilient bottom presses the remaining stack in the separating position against the separating rollers. Such a slightly inclined position of the sheet stack is also advantageous for ergonomic reasons, because the operating personnel require appropriate accessibility or an overview of the existing sheet stack.

Es ist auch eine Vereinzelungsvorrichtung für zwei gegenüberliegende Vorratsschächte bekannt (UK-Patentanmeldung 2,022,059), bei der eine einzige Separierrolle zwischen den beiden Vorratsmagazinen angeordnet ist und in die beiden Separierstellunen schwenkbar ist. Dieses System hat jedoch den Nachteil, daß die Position der Separierrolle nach jedem Schwenkvorgang genau bestimmt werden muß, weil sich sonst die Anpreßkraft des federnden Bodens, auf dem der Blattstapel ruht, verändert und somit die Separierkraft.A separation device for two opposing supply shafts is also known (UK patent application 2,022,059), in which one only separating roller is arranged between the two storage magazines and can be pivoted into the two separating positions. However, this system has the disadvantage that the position of the separating roller must be determined precisely after each swiveling operation, because otherwise the contact pressure of the resilient floor on which the stack of sheets rests changes, and thus the separating force.

Der Erfindung liegt die Aufgabe zugrunde, eine sicher arbeitende Vorratsschachtanwahl zu schaffen, die auch für größere Schachtabstände und für größere Vorratsschächte einsetzbar ist.The invention has for its object to provide a safe working shaft selection, which can also be used for larger shaft distances and for larger storage shafts.

Die gestellte Aufgabe wird bei der eingangs bezeichneten Vorrichtung erfindungsgemäß dadurch gelöst, daß der Antriebsmotor linksdrehend oder rechtsdrehend ansteuerbar ist, daß das Antriebsmotorritzel mit einem ersten Zahnrad in Eingriff steht, das eine exzentrisch gelagerte Nocke trägt, die in eine Schaltschwinge eingreift und daß an der um eine horizontale Achse gelagerten Schaltschwinge zumindest ein zweites Zahnrad drehgelagert ist, das abhängig von der Drehrichtung des Antriebsmotors in Eingriff mit dem jeweiligen Zahnrad einer der Separierrollen schwenkbar ist. Die jeweilige Drehrichtung steuert hier eine Schaltschwinge durch Zahneingriff. Somit weist die Vorrichtung keine kritischen Teile auf, die die Funktion beeinträchtigen oder einen besonderen Verschleiß bedingen könnten. Die Vorrichtung arbeitet daher sehr sicher. Außerdem gestattet die Verschwenkbewegung baulich größere Vorratsmagazine und einen größeren Abstand anzuwenden.The stated object is achieved according to the invention in the above-mentioned device in that the drive motor can be driven counterclockwise or clockwise that the drive motor pinion is in engagement with a first gearwheel which carries an eccentrically mounted cam which engages in a rocker arm and in that around a horizontal axis mounted rocker arm is rotatably mounted at least a second gear which is pivotable depending on the direction of rotation of the drive motor in engagement with the respective gear of one of the separating rollers. The respective direction of rotation controls a rocker arm by meshing teeth. Thus, the device has no critical parts that could impair its function or cause particular wear. The device therefore works very safely. In addition, the pivoting movement allows structurally larger storage magazines and a larger distance to be used.

In Weiterbildung der Erfindung ist vorgesehen, daß die auf dem ersten Zahnrad angeordnete Nocke zwischen den Schenkeln einer Federdrahtspange gelagert ist. Der Vorteil besteht in einer Bewegungsfreiheit des Antriebsmotors. Da dieser ohne Rückmeldung arbeiten kann, erfolgt eine Drehbewegung unabhängig von der Zahnstellung der zu den Separierrollen gehörenden Zahnrädern.In a further development of the invention it is provided that the cam arranged on the first gear wheel is mounted between the legs of a spring wire clip. The advantage is the freedom of movement of the drive motor. Since this can work without feedback, a rotary movement takes place regardless of the tooth position of the gears belonging to the separating rollers.

Weitere Merkmale der Erfindung bestehen darin, daß an der Schaltschwinge ein drittes Zahnrad drehgelagert ist, das mit dem zweiten Zahnrad in Eingriff steht und außerdem über einen Getriebezug mit einem Zahnrad kämmt, das auf der Achse der Druckwalze angeordnet ist und daß die Schaltschwinge um die horizontale Achse des dritten Zahnrades schwenkbar gelagert ist. Vorteilhafterweise wird mit dieser Maßnahme aus dem Kraftfluß der Schaltschwinge eine weitere Antriebskraft für die Zuführung des Einzelblattes zur Druckwalze abgeleitet.Further features of the invention are that a third gear is rotatably mounted on the rocker arm, which engages with the second gear and also meshes via a gear train with a gear which is arranged on the axis of the pressure roller and that the rocker arm about the horizontal Axis of the third gear is pivotally mounted. This measure advantageously derives a further driving force for feeding the single sheet to the pressure roller from the force flow of the shift rocker.

Eine weitere Antriebsverzweigung wird dadurch erzielt, daß an den das dritte Zahnrad mit der Druckwalze antriebstechnisch verbindenden Getriebezug ein viertes Zahnrad im Bereich der Eingangskante eines Ablagefaches für bedruckte Einzelblätter angeschlossen ist, auf dessen Achse Transportrollen angeordnet sind.A further drive branch is achieved in that a fourth gearwheel is connected to the gear train connecting the third gearwheel with the printing roller in the area of the input edge of a storage compartment for printed single sheets, on the axis of which transport rollers are arranged.

Der Transport eines fertigbedruckten Einzelblattes kann zusätzlich unterstützt werden, indem der Druckwalze am Ausgang ein Führungswalzenpaar zugeordnet ist, dessen Führungsspalt mit den Transportrollen des Ablagefaches etwa auf einer Tangente zu den Transportrollen verläuft.The transport of a finished printed single sheet can be additionally supported by assigning a pair of guide rollers at the exit to the printing roller, the guide gap of which, with the transport rollers of the storage compartment, runs approximately on a tangent to the transport rollers.

Eine Trennung von den übrigen Baugruppen einer schreibenden Büromaschine wird noch dadurch erzielt, daß zumindest die Vorratsschächte, das Ablagefach, die Separierrollen mit Zahnrädern, der Antriebsmotor, die Schaltschwinge mit Zahnrädern und der Getriebezug sowie die Transportrollen auf einem auf der Druckwalzenachse einhängbaren Rahmen zusammengefaßt sind und daß der Rahmen am Druckerchassis verriegelbar ist.A separation from the other assemblies of a writing office machine is achieved in that at least the storage shafts, the storage compartment, the separating rollers with gearwheels, the drive motor, the rocker arm with gearwheels and the gear train as well as the transport rollers are combined on a frame that can be attached to the pressure roller axis and that the frame can be locked on the printer chassis.

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

  • Fig. 1 eine Seitenansicht eines Matrixdruckers mit der Schaltschwinge in Neutralstellung und
  • Fig. 2 die Seitenansicht gemäß Fig. 1, vereinfacht und mit einer der möglichen Betriebsstellungen der Schaltschwinge.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
  • Fig. 1 is a side view of a matrix printer with the rocker arm in the neutral position and
  • Fig. 2 shows the side view of FIG. 1, simplified and with one of the possible operating positions of the shift rocker.

Das Ausführungsbeispiel zeigt einen Matrixdrucker 1, der sowohl einen Traktor 2 für Endlosbahnen und eine Vorrichtung 3 zum Zuführen von Einzelblättern zur Druckwalze 4 mit zwei Vorratsschächten 5 und 6 aufweist.The exemplary embodiment shows a matrix printer 1 which has both a tractor 2 for endless webs and a device 3 for feeding single sheets to the printing roller 4 with two supply shafts 5 and 6.

Dem Vorratsschacht 5 ist eine eigene Separierrolle (Rollenpaar) 7 und dem Vorratsschacht 6 eine ebenfalls eigene Separierrolle 8 (Rollenpaar) zugeordnet. Ein Antriebsmotor 9, hier vorteilhafterweise bestehend aus einem Schrittmotor, treibt mit seinem Antriebsmotorritzel 10 auf ein erstes Zahnrad 11. Dieses erste Zahnrad 11 trägt eine exzentrisch angeordnete Nocke 12 an der dargestellten Position, in der eine Schaltschwinge 13 in ihrer neutralen (senkrechten) Lage steht. Hierbei ist die Schaltschwinge 13 um eine horizontale Achse 14 schwenkbar gelagert, wobei die horizontale Achse 14 zunächst auch höher angeordnet sein kann als gezeichnet ist. Dieser Fall tritt auf, wenn ein zweites Zahnrad 15 lediglich in Funktion mit einem Zahnrad 16 tritt, das konzentrisch auf der Drehachse der Separierrolle 7 angeordnet ist oder in Funktion mit einem weiteren Zahnrad 17 tritt, das konzentrisch auf der Drehachse der Separierrolle 8 angeordnet ist. Die Höhenlage der horizontalen Achse 14 bestimmt dann allerdings den Schwenkweg der Schaltschwinge 13 nach links und rechts zu den Zahnrädern 16 und 17.The supply shaft 5 is assigned its own separating roller (pair of rollers) 7 and the supply shaft 6 is also assigned its own separating roller 8 (pair of rollers). A drive motor 9, here advantageously consisting of a stepper motor, drives with its drive motor pinion 10 on a first gear 11. This first gear 11 carries an eccentrically arranged cam 12 at the position shown, in which a rocker arm 13 is in its neutral (vertical) position . Here, the rocker arm 13 is pivotally mounted about a horizontal axis 14, wherein the horizontal axis 14 can initially be arranged higher than shown. This case occurs when a second gear 15 only functions with a gear 16 which is arranged concentrically on the axis of rotation of the separating roller 7 or comes into operation with a further gear 17 which is arranged concentrically on the axis of rotation of the separating roller 8. However, the height of the horizontal axis 14 then determines the pivoting path of the shift rocker 13 to the left and right to the gears 16 and 17.

Die auf dem ersten Zahnrad 11 befestigte Nocke 12 ist zwischen den Schenkeln 18a und 18b einer Federdrahtspange 18 geführt. Zwischen diesen Schenkeln 18a und 18b ist außerdem das zweite Zahnrad 15 mit seinem Drehlager 19 gehalten. Die Federdrahtspange 18 ist gegen Lageveränderungen durch einen Bügel 20 gesichert. Die Federdrahtspange 18 ist außerdem in ihrer Längsrichtung durch Ansätze 21 und durch einen Schaftbolzen 22 festgelegt.The cam 12 fastened on the first gearwheel 11 is guided between the legs 18a and 18b of a spring wire clasp 18. The second gear wheel 15 is also held with its rotary bearing 19 between these legs 18a and 18b. The spring wire clasp 18 is against changes in position secured by a bracket 20. The spring wire clip 18 is also fixed in its longitudinal direction by lugs 21 and by a shaft pin 22.

An der Schaltschwinge 13 kann aber auch noch ein drittes Zahnrad 23 auf der horizontalen Achse 14 drehgelagert sein, das mit dem zweiten Zahnrad 15 dauernd in Eingriff steht. An das dritte Zahnrad 23 ist antriebstechnisch ein Getriebezug 24, bestehend aus ineinandergreifenden Zahnrädern 25,26,27,28,29,30,31 angeschlossen, wobei das letzte Zahnrad 31 in ein Zahnrad 32 eingreift, das auf der Achse 33 der Druckwalze 4 angeordnet ist. Hier fällt die Schwenkachse der Schaltschwinge 13 mit der horizontalen Achse 14 des dritten Zahnrades 23 zusammen.On the rocker arm 13, however, a third gear 23 can also be rotatably mounted on the horizontal axis 14, which is in constant engagement with the second gear 15. In terms of drive technology, a gear train 24 consisting of intermeshing gears 25, 26, 27, 28, 29, 30, 31 is connected to the third gear 23, the last gear 31 engaging in a gear 32 which is arranged on the axis 33 of the printing roller 4 is. Here, the pivot axis of the rocker arm 13 coincides with the horizontal axis 14 of the third gear 23.

An den Getriebezug 24, der die Antriebskraft des dritten Zahnrades 23 überträgt, ist im Bereich der Eingangskante 34 ein viertes Zahnrad 37 drehgelagert, das zum Transport von (bedruckten) Einzelblättern 5a bzw. 6a in des Ablagefach 36 dient. Auf der Achse 35a des vierten Zahnrades 37 sind Transportrollen 35 angeordnet, die mit dem jeweiligen Einzelblatt 5a bzw. 6a reibschlüssig zusammenwirken. Die Einzelblätter 5a und 6a gelangen in den Einflußbereich der Transportrollen 35, indem der Druckwalze 4 am Ausgang 4a ein Führungswalzenpaar 38 nachgeschaltet ist, das mit seinem Führungsspalt 39 mit den Transportrollen 35 des Ablagefaches 36 eine Tangente 40 bildet.On the gear train 24, which transmits the driving force of the third gear 23, a fourth gear 37 is rotatably mounted in the area of the input edge 34, which serves for the transport of (printed) individual sheets 5a or 6a in the storage compartment 36. Transport rollers 35 are arranged on the axis 35a of the fourth gearwheel 37, which cooperate with the respective individual sheet 5a or 6a in a frictionally locking manner. The individual sheets 5a and 6a reach the area of influence of the transport rollers 35, in that the pressure roller 4 is followed by a pair of guide rollers 38 at the outlet 4a, which forms a tangent 40 with its guide gap 39 with the transport rollers 35 of the storage compartment 36.

Auf dem Matrixdrucker 1 ist auf der Druckwalzenachse 33 ein Rahmen 41 eingehängt und durch lösbare Verriegelungsmittel 42 am Druckerchassis 1a verriegelt. Der Rahmen 4 trägt hierbei außer den Vorratsschächten 5 und 6 das Ablagefach 36, die Separierrollen 7 und 8 mit den Zahnräden 16 und 17, den Antriebsmotor 9, die Schaltschwinge 13 mit den Zahnrädern 11, 15 und 23, den Getriebezug 24 und die Transportrollen 37.A frame 41 is suspended on the matrix printer 1 on the printing roller axis 33 and locked to the printer chassis 1a by releasable locking means 42. In addition to the storage shafts 5 and 6, the frame 4 carries the storage compartment 36, the separating rollers 7 and 8 with the toothed wheels 16 and 17, the drive motor 9, the rocker arm 13 with the toothed wheels 11, 15 and 23, the gear train 24 and the transport rollers 37 .

In Fig. 2 is gezeigt, daß bei "Rechtsansteuerung" des Antriebsmotors 9 die Schaltschwinge 13 über das Antriebsmotorritzel 10 und das erste Zahnrad 11 durch die Nocke 12 derart verschwenkt wird, daß das zweite Zahnrad 15 in das Zahnrad 17 der Separierrolle 8 eingreift und somit Einzelblätter 6a aus dem Vorratsschacht 6 abgezogen werden.In Fig. 2 it is shown that the "right-hand drive" of the drive motor 9 Switch rocker 13 is pivoted via the drive motor pinion 10 and the first gear 11 by the cam 12 such that the second gear 15 engages in the gear 17 of the separating roller 8 and thus individual sheets 6a are withdrawn from the supply shaft 6.

Claims (6)

1. A device for feeding single sheets of paper (5a, 6a) to the platen (4) of an office machine, in particular a matrix printer, comprising a plurality of supply compartments (5, 6) with each of which a separating roller (7, 8) which is rotationally mounted on a fixed spindle is associated, which roller is connected via a gear train (24) to a drive motor, characterised in that a separate drive motor (9) can be driven for rotation to the left or the right, that a drive motor pinion (10) is engaged with a first gear wheel (11) which bears an eccentrically mounted cam (12) which engages in a switching link (13) and that at least one second gear wheel (15) is rotationally mounted on the switching link (13) which is mounted about a horizontal spindle (14), which second gear wheel can be pivoted into engagement with the respective gear wheel (16; 17) of one of the separating rollers (7, 8), dependent on the direction of rotation of the drive motor (9).
2. A device according to Claim 1, characterised in that the cam (12) located on the first gear wheel (11) is mounted between the arms (18a, 18b) of a spring wire clasp (18).
3. A device according to Claims 1 or 2, characterised in that a third gear wheel (23) is rotationally mounted on the switching link (13), which wheel is engaged with the second gear wheel (15) and furthermore meshes by means of a gear train (24) with a gear wheel (32) which is located on the spindle (33) of the print roller (4) and that the switchimg link (13) is mounted to he pivotable about the horizontal spindle (14) of the third gear wheel (23).
4. A device according to one or more of Claims 1 to 3, characterised in that a fourth gear wheel (37) is connected to the gear train (24) which connects the third gear wheel (23) drive-wise to the print roller (4) in the region of the leading edge (34) of a bin (36) for printed single sheets (5a, 6a), on the spindle (35a) of which transport rollers (35) are located.
5. A device according to Claims 1 to 4, characterised in that a pair of guide rollers (38) is associated with the print roller (4) at the exit (4a), the guidance gap (39) of which rollers with the transport rollers (35) of the bin (36) runs approximately at a tangent (40) to the transport rollers (35).
6. A device according to Claims 1 to 5, characterised in that at least the supply compartments (5, 6), the bin (36), the separating rollers (7, 8) with gear wheels (16, 17), the drive motor (9), the switching link (13) with gear wheels (11, 15, 23) and the gear train (24) and also the transport rollers (35) are combined on a frame (41) which can be suspended on the print roller spindle (4b) and that the frame (41) can be locked on to the printer chassis (1a).
EP88730024A 1987-03-12 1988-02-04 Device for feeding paper sheets to the platen of an office machine, particularly of a matrix printer Expired - Lifetime EP0332794B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88730024T ATE74827T1 (en) 1987-03-12 1988-02-04 DEVICE FOR FEEDING INDIVIDUAL SHEETS TO THE TYPE CYLINDER OF AN OFFICE MACHINE, IN PARTICULAR A MATRIX PRINTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3707886 1987-03-12
DE19873707886 DE3707886A1 (en) 1987-03-12 1987-03-12 DEVICE FOR FEEDING SINGLE SHEETS TO THE WRIST ROLL OF A OFFICE MACHINE, IN PARTICULAR A MATRIX PRINTER

Publications (2)

Publication Number Publication Date
EP0332794A1 EP0332794A1 (en) 1989-09-20
EP0332794B1 true EP0332794B1 (en) 1992-04-15

Family

ID=6322815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730024A Expired - Lifetime EP0332794B1 (en) 1987-03-12 1988-02-04 Device for feeding paper sheets to the platen of an office machine, particularly of a matrix printer

Country Status (5)

Country Link
US (1) US5080515A (en)
EP (1) EP0332794B1 (en)
JP (1) JPS63242666A (en)
AT (1) ATE74827T1 (en)
DE (2) DE3707886A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02175532A (en) * 1988-12-23 1990-07-06 Shinko Seisakusho Co Ltd Form feeding device for electrophotographic printer
DE3916982A1 (en) * 1989-05-24 1990-02-08 Siemens Ag Controllable coupling for the mechanical decoupling of shafts driven in parallel by motor
DE3934936A1 (en) * 1989-10-17 1991-04-25 Mannesmann Ag DEVICE FOR PAPER FEEDING A PRINTER, IN PARTICULAR A MATRIX PRINTER
DE3943136A1 (en) * 1989-12-28 1991-07-04 Helmut Steinhilber DEVICE FOR THE AUTOMATIC FEEDING OF SINGLE SHEETS AND THE LIKE TO AN OFFICE MACHINE
DE4039389A1 (en) * 1990-12-10 1992-06-11 Siemens Ag Printer for cut sheet and continuous sheet feed - has paper feed over friction feed print roller with two position lever preventing simultaneous feed of both paper formats
JPH06179273A (en) * 1992-10-12 1994-06-28 Brother Ind Ltd Printing device
US5727890A (en) * 1993-10-29 1998-03-17 Hewlett-Packard Company Multiple-function printer with common mounting chassis feeder/output path mechanisms
US6000870A (en) * 1996-10-14 1999-12-14 Brother Kogyo Kabushiki Kaisha Printing device having dual sheet feed trays
US6325559B1 (en) * 2000-06-02 2001-12-04 Hewlett-Packard Company Single transmission state media handling for ejecting, picking and loading
US7451975B2 (en) * 2004-03-18 2008-11-18 Lexmark International, Inc. Input tray and drive mechanism using a single motor for an image forming device
ATE491580T1 (en) 2005-08-31 2011-01-15 Brother Ind Ltd PRINTER WITH SHEET FEEDER
JP4277902B2 (en) * 2006-12-27 2009-06-10 ブラザー工業株式会社 Sheet conveying apparatus and image recording apparatus

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816442C2 (en) * 1978-04-15 1981-12-17 Helmut 7210 Rottweil Steinhilber Device for feeding single sheets from a stack of paper stored in a magazine to the platen of an office machine
DE2856950C2 (en) * 1978-04-15 1982-08-26 Helmut 7210 Rottweil Steinhilber Device for feeding sheets of paper for an office writing machine
US4222557A (en) * 1978-05-16 1980-09-16 Wang Laboratories, Inc. Printer feeding and stacking
JPS55123833A (en) * 1979-03-16 1980-09-24 Nec Corp Blank-form feeding apparatus
JPS58212537A (en) * 1982-05-31 1983-12-10 Toshiba Corp Paper carrying device
DE3234562A1 (en) * 1982-09-17 1984-05-10 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR SELECTIVELY REMOVING SINGLE PAPER SHEETS FROM TWO CASSETTE
JPS59177236A (en) * 1983-03-26 1984-10-06 Canon Inc Paper feeder
JPS61136842A (en) * 1984-12-05 1986-06-24 Sharp Corp Automatic original feeding apparatus
DE3445633A1 (en) * 1984-12-14 1986-06-26 Mannesmann AG, 4000 Düsseldorf DEVICE FOR SEPARATION OR SUPPLYING RECORD CARRIERS FOR A TYPEWRITER, IN PARTICULAR FOR A MATRIX PRINTER
JPH07106801B2 (en) * 1985-07-31 1995-11-15 セイコーエプソン株式会社 Paper feeder
FR2596703B1 (en) * 1986-04-08 1988-07-08 Sagem PRINTING MACHINE EQUIPPED WITH A DEVICE FOR SELECTIVELY FEEDING PRINTED SHEETS DISTRIBUTED IN TWO LOADING TRAYS
US4729680A (en) * 1986-06-09 1988-03-08 Xerox Corporation Selector latch for a sheet feeder

Also Published As

Publication number Publication date
JPS63242666A (en) 1988-10-07
DE3707886C2 (en) 1990-05-10
DE3870217D1 (en) 1992-05-21
US5080515A (en) 1992-01-14
DE3707886A1 (en) 1988-09-22
ATE74827T1 (en) 1992-05-15
EP0332794A1 (en) 1989-09-20

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