EP0112276B1 - Device for feeding single sheets from a pile of sheets - Google Patents

Device for feeding single sheets from a pile of sheets Download PDF

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Publication number
EP0112276B1
EP0112276B1 EP83730101A EP83730101A EP0112276B1 EP 0112276 B1 EP0112276 B1 EP 0112276B1 EP 83730101 A EP83730101 A EP 83730101A EP 83730101 A EP83730101 A EP 83730101A EP 0112276 B1 EP0112276 B1 EP 0112276B1
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EP
European Patent Office
Prior art keywords
sheets
stack
guide
separation
axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83730101A
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German (de)
French (fr)
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EP0112276A2 (en
EP0112276A3 (en
Inventor
Gerhard Lohrmann
Kurt Röhrer
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Vodafone GmbH
Original Assignee
Mannesmann AG
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Publication date
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Publication of EP0112276A2 publication Critical patent/EP0112276A2/en
Publication of EP0112276A3 publication Critical patent/EP0112276A3/en
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Publication of EP0112276B1 publication Critical patent/EP0112276B1/en
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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
    • B41J13/10Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/103Sheet holders, retainers, movable guides, or stationary guides for the sheet feeding section

Definitions

  • the invention relates to a device for feeding individual sheets from a stack of sheets into the guide channel assigned to a platen roller by means of drivable separating rollers, a stacking base movable against the separating rollers and stops for the stack of sheets, and separating the individual sheets, separating the separating rollers in the lateral edge regions of the stack of sheets opposite assigned locking fingers .
  • Such devices for separating individual sheets from a stack of sheets are used, for example, in typewriters.
  • the known solution also uses a movable stacking base which is continuously pressed against the rollers separating the individual sheets by means of spring force.
  • the stackable floor which can be moved by spring force, pushes up more than just one sheet, so that the separating roller also transports two sheets which are pushed against the locking finger.
  • the locking finger also serves only as a stop and not for the actual separation of individual sheets in the area of the stacking base.
  • the present invention therefore assumes that both side stops for the sheet stack and separating fingers separating the individual sheets are assigned to the stack bottom at the level of the stack of sheets.
  • the locking fingers are arranged in corner areas of the sheet stack, so that a single sheet maintains a transverse position during the separation, as a result of which the separation process is not always favorable.
  • the curvature of the sheet to be pulled in its longitudinal direction is determined by a specially angled stacking base, whereby depending on the height of the stack of sheets, there are considerably different conditions for the position of the angled part of the stacking base, so the angled part of the stacking base is only in a parallel position to the separating fingers if the last sheet of a stack of sheets is below the separating fingers.
  • Such a stacked base proves to be relatively rigid and does not support the curvature of the single sheet to be separated, which makes the separation process easier.
  • the invention is therefore based on the object of developing the device described at the outset with a view to improved disengagement of a single sheet from the region of the laterally arranged locking fingers.
  • the stacking base is formed from one or more guide strips arranged symmetrically to the center of the single sheet, each of which is assigned a drivable separating roller opposite in the area of a front stop, and that the separating rollers at least at the start of the separating process Path overlap by the locking fingers against the feed direction of a single sheet are driven.
  • This solution has several advantages at the same time: the formation of the stacking base from individual guide strips in connection with the opposing arrangement of separating rollers allows the sheet to be arched transversely to the feed direction. Due to the fact that the locking fingers are assigned to the separating rollers in the lateral edge areas of the sheet stack, this transverse bulging of the single sheet is further promoted. Another advantage is that the retraction of the single sheet in a transversely arched shape allows the single sheet to be safely removed from the area of the locking fingers, after which the movement in the feed direction causes a single sheet to slide securely over the locking fingers.
  • the guide strips, laterally parallel guide walls and spacer rods are combined to form a rocker, which by means of a Axis of rotation is pivotally mounted in the side parts of the device frame.
  • the design of the seesaw and the swivel mounting enable the entire stack to be swiveled in the direction of the separating rollers.
  • rocker is assigned a control bridge, which consists of one or more spring-loaded levers pivoted by means of an axle in the side parts of the device frame. Regardless of the height of the stack of sheets, the rocker is therefore always pivoted in the direction of the separating rollers, the contact pressure being kept almost constant.
  • rocker serves as a guide for a guide wall adjustable to paper width.
  • the drive transmission for the separating rollers is carried out according to further features of the invention in that the separating rollers are arranged on an axis that can be driven by the platen roller and that the drive movement can be transmitted in the two directions of rotation by means of an electromagnetic clutch or by means of a drive train.
  • a front stop and the locking fingers are arranged on superposed axes.
  • the axes 3, 4, 5 are rotatably mounted in the side parts 1 and 2.
  • rocker 31 On the axis 3 there is a rocker 31 which consists of the guide walls 6 and 7 and the spacer rods 8 which are firmly pressed or loosely inserted therein.
  • Another guide wall 9 can be laterally displaced on the axis 3 or the spacer bar 8 according to the desired paper width and locked on the axis 3 by means of a locking lever (not described in more detail).
  • stop angles 10 and 11 are provided in the rear position, which can be shifted into locking positions or steplessly and are adjusted according to the respective length of the single sheet or a single form.
  • the separating rollers 17 and further drive parts to be described are located on the axis 4.
  • a control bridge 32 is formed, which is formed from the outer levers 12, which are fixedly connected to the axis 5, and an axis 13.
  • the axis 13 is in engagement with the guide walls 6, 7 and 9 of the rocker 31 via the elongated holes 6a.
  • the control bridge 32 is pivoted clockwise by two tension springs 14 and takes the rocker 31 supported thereon by the axis 13.
  • the stack of forms 16 supported on the guide strips 15 comes to rest against the separating rollers 17 located on the axis 4.
  • the contact pressure remains constant, even if the height of the stack of forms 16 changes.
  • the one limitation for the stack of forms 16 is formed by two front stops 18 which are mounted on the axis 19.
  • the device is u. a. driven by the clutch wheel 20, which is in engagement via a gear train 21 with a gear 23 which is fixedly connected to the platen roller 22.
  • the clutch wheel 20 is part of the electromagnetic clutch 24 which, when energized, transmits the rotary movement emanating from the platen roller 22 to the axis 4 in the same direction of rotation.
  • the upper sheet from the overlap area of the locking fingers 25 is used as paper hold-down removed and forced by the surface curvature of the guide strips 15 to an even larger belly formation in the longitudinal direction.
  • the side sheet corners held down can bend back at the same time, after having previously been displaced by the height offset of the separating rollers to the locking fingers 25 were curved.
  • the axis 4 with the separating rollers 17 are turned clockwise, ie. H. rotated in the feed direction for the single sheets.
  • the separating rollers 17 push the sheet into the effective range of the platen roller 22, after which the electromagnetic clutch 24 switches off.
  • the top form which bends back at the corners, is transported over the blocking fingers 25 and fed to the friction rollers 27 through a guide plate 26.
  • a sensor 29 is arranged, which senses the front edge of the single sheet and thus initiates a preprogrammed reversing movement which conveys the single sheet into the desired printing position.
  • the printed single sheet or form is ejected into a fold-away storage compartment 30, the advantage of which is that when the stack of forms 16 is inserted, one has full view of the stack of forms.
  • multilayer form sets can also be fed.

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)

Description

Die Erfindung betrifft eine Vorrichtung für die Zuführung einzelner lätter von einem Blattstapel in den einer Schreibwalze zugeordneten Führungskanal mittels antreibbarer Vereinzelungsrollen, einem gegen die Vereinzelungsrollen bewegbaren Stapelboden und Anschlägen für den Blattstapel sowie die Einzelblätter separierenden, den Vereinzelungsrollen in den seitlichen Randbereichen des Blattstapels gegenüber zugeordneten Sperrfingern.The invention relates to a device for feeding individual sheets from a stack of sheets into the guide channel assigned to a platen roller by means of drivable separating rollers, a stacking base movable against the separating rollers and stops for the stack of sheets, and separating the individual sheets, separating the separating rollers in the lateral edge regions of the stack of sheets opposite assigned locking fingers .

Derlei Vorrichtungen für die Separierung einzelner Blätter von einem Blattstapel werden beispielsweise in Schreibautomaten. Druckern, insbesondere in Matrixdruckern, verwendet.Such devices for separating individual sheets from a stack of sheets are used, for example, in typewriters. Printers, especially in matrix printers used.

Es ist bekannt (DE-Patentschrift 29 28 353), aus Transportwalzen einen Klemmspalt für das geförderte Blatt zu bilden, wobei die Transportwalzen über eine Rutschkupplung mit dem Antrieb der Schreibwalzen verbunden sind. Hierbei ist der Sperrfinger dem Klemmspalt zugeordnet und die Betätigungselemente für den Sperrfinger bestehen aus einer mit der Schreibwalze schlupffrei gekuppelten Nockenscheibe und aus einem die Nockenscheibe abtasten, den, mit dem Sperrfinger verbundenen Abtasthebel, wobei die Transportwalzen vom Transportorgan einerseits und von der Schreibwalze andererseits in einem solchen Abstand angeordnet sind, daß das geförderte Blatt jeweils gleichzeitig mit einer separierenden Transportrolle und den den Klemmspalt bildenden Transportrollen bzw. mit der Schreibwalze in Kontakt steht.It is known (DE Patent 29 28 353) to form a nip for the conveyed sheet from transport rollers, the transport rollers being connected to the drive of the platen rollers via a slip clutch. Here, the locking finger is assigned to the clamping gap and the actuating elements for the locking finger consist of a cam disc that is coupled with the platen roller without slippage and from which the cam disc is scanned, the scanning lever connected to the locking finger, the transport rollers from the transport element on the one hand and from the platen roller on the other such a distance are arranged that the conveyed sheet is in contact with a separating transport roller and the transport rollers forming the nip or with the platen roller at the same time.

Die bekannte Lösung bedient sich außerdem eines bewegbaren Stapelbodens, der mittels Federkraft andauernd gegen die die Einzelblätter separierenden Rollen gedrückt wird. Hierbei ist jedoch nicht auszuschließen, daß der mittels Federkraft bewegbare Stapelboden mehr als nur ein Blatt nach oben drückt, so daß die Vereinzelungsrolle auch zwei Blätter transportiert, die gegen den Sperrfinger geschoben werden. Im bekannten Fall dient außerdem der Sperrfinger lediglich als Anschlag und nicht zur eigentlichen Separierung von einzelnen Blättern im Bereich des Stapelbodens.The known solution also uses a movable stacking base which is continuously pressed against the rollers separating the individual sheets by means of spring force. However, it cannot be ruled out that the stackable floor, which can be moved by spring force, pushes up more than just one sheet, so that the separating roller also transports two sheets which are pushed against the locking finger. In the known case, the locking finger also serves only as a stop and not for the actual separation of individual sheets in the area of the stacking base.

Die vorliegende Erfindung unterstellt daher, daß dem Stapelboden sowohl seitliche Anschläge für den Blattstapel als auch die Einzelblätter separierende Sperrfinger auf Höhe des Blattstapels zugeordnet sind.The present invention therefore assumes that both side stops for the sheet stack and separating fingers separating the individual sheets are assigned to the stack bottom at the level of the stack of sheets.

Die eingangs bezeichnete Vorrichtung ist aus der US-A1-4 089 402 bekannt. Dort sind die Sperrfinger in Eckbereichen des Blattstapels angeordnet, so daß beim Separieren ein Einzelblatt geine querverlaufende Lage beibehält, wodurch der Separiervorgang nicht immer günstig verläuft. Außerdem wird die Wölbung des abzuziehenden Blattes in seiner Längsrichtung durch einen speziell abgewinkelten Stapelboden bestimmt, wobei je nach Höhe des Blattstapels sich erheblich unterschiedliche Verhältnisse für die Lage des abgewinkelten Teils des Stapelbodens ergeben, So befindet sich der abgewinkelte Teil des Stapelbodens erst in einer parallelen Lage zu den Separierfingern, wenn das Letzte Blatt eines Blattstapels unter den Separierfingern liegt. Ein derartiger Stapelboden erweist sich als relativ starr und unterstützt nicht die Wölbung des zu separierenden Einzelblattes, aufgrund deren der Separiervorgang erleichtert wird.The device described in the introduction is known from US-A1-4 089 402. There, the locking fingers are arranged in corner areas of the sheet stack, so that a single sheet maintains a transverse position during the separation, as a result of which the separation process is not always favorable. In addition, the curvature of the sheet to be pulled in its longitudinal direction is determined by a specially angled stacking base, whereby depending on the height of the stack of sheets, there are considerably different conditions for the position of the angled part of the stacking base, so the angled part of the stacking base is only in a parallel position to the separating fingers if the last sheet of a stack of sheets is below the separating fingers. Such a stacked base proves to be relatively rigid and does not support the curvature of the single sheet to be separated, which makes the separation process easier.

Bei einer derartigen Bauweise, bei der der Blattstapel mittels der Sperrfinger nach oben zusammengehalten wird, besteht die besondere Schwierigkeit, ein Einzelblatt aus dem Eingriff der Sperrfinger, die meist paarweise in den Randbereichen des Blattstapels vorgesehen sind, herauszubringen.With such a construction, in which the sheet stack is held together by means of the locking fingers, there is a particular difficulty in removing a single sheet from the engagement of the locking fingers, which are usually provided in pairs in the edge areas of the sheet stack.

Der Erfindung liegt daher die Aufgabe zugrunde, die eingangs bezeichnete Vorrichtung im Hinblick auf ein verbessertes Außereingriffbringen eines Einzelblattes aus dem Bereich der seitlich angeordneten Sperrfinger weiterzubilden.The invention is therefore based on the object of developing the device described at the outset with a view to improved disengagement of a single sheet from the region of the laterally arranged locking fingers.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Stapelboden aus einer oder mehreren zur Einzelblatt-Mitte symmetrisch angeordneten Führungsleisten gebildet ist, denen jeweils eine antreibbare Vereinzelungsrolle gegenüberliegend im Bereich eines vorderen Anschlags zugeordnet ist, und das die Vereinzelungsrollen zu Beginn des Vereinzelungsvorgangs zumindest um den Weg der Überdeckung durch die Sperrfinger entgegen der Vorschubrichtung eines Einzelblattes drehantreibbar sind. Diese Lösung weist gleich mehrere Vorteile auf: Die Ausbildung des Stapelbodens aus einzelnen Führungsleisten in Verbindung mit der gegenüberliegenden Anordnung von Vereinzelungsrollen gestattet ein Aufwölben des Blattes quer zur Vorschubrichtung. Aufgrund dessen, daß die Sperrfinger den Vereinzelungsrollen in den seitlichen Randbereichen des Blattstapels zugeordnet sind, wird diese Queraufwölbung des Einzelblattes noch gefördert. Ein weiterer Vorteil besteht darin, daß das Zuruckziehen des Einzelblattes in queraufgewölbter Form ein sicheres Entziehen des Einzelblattes aus dem Bereich der Sperrfinger erlaubt, wonach die Bewegung in Vorschubrichtung ein sicheres Gleiten eines Einzelblattes über die Sperrfinger hinweg bewirkt.The object is achieved according to the invention in that the stacking base is formed from one or more guide strips arranged symmetrically to the center of the single sheet, each of which is assigned a drivable separating roller opposite in the area of a front stop, and that the separating rollers at least at the start of the separating process Path overlap by the locking fingers against the feed direction of a single sheet are driven. This solution has several advantages at the same time: the formation of the stacking base from individual guide strips in connection with the opposing arrangement of separating rollers allows the sheet to be arched transversely to the feed direction. Due to the fact that the locking fingers are assigned to the separating rollers in the lateral edge areas of the sheet stack, this transverse bulging of the single sheet is further promoted. Another advantage is that the retraction of the single sheet in a transversely arched shape allows the single sheet to be safely removed from the area of the locking fingers, after which the movement in the feed direction causes a single sheet to slide securely over the locking fingers.

Das Separieren eines Einzelblattes wird nunmehr auch noch dadurch unterstützt, daß die Führungsleisten des Stapelbodens unter einem stumpfen Winkel aneinander anschließende Auflageflächen bilden. Hierdurch entsteht nämlich ein Aufwölben in Längsrichtung des Einzelblattes, wodurch ebenfalls das Außereingriffbringen aus der Wirkung der Sperrfinger unterstützt wird.The separation of a single sheet is now also supported in that the guide strips of the stacking base form adjoining support surfaces at an obtuse angle. This results in a bulging in the longitudinal direction of the single sheet, which also supports disengagement from the action of the locking fingers.

Nach der weiteren Erfindung ist vorgesehen, daß die Führungsleisten, seitlich parallel verlaufende Führungswände und Distanzstangen zu einer Wippe vereinigt sind, die mittels einer Drehachse schwenkbar in den Seitenteilen des Geräterahmens gelagert ist. Die Ausbildung zur Wippe sowie die schwenkbare Lagerung ermöglichen ein Schwenken des gesamten Stapels in Richtung auf die Vereinzelungsrollen.According to the further invention it is provided that the guide strips, laterally parallel guide walls and spacer rods are combined to form a rocker, which by means of a Axis of rotation is pivotally mounted in the side parts of the device frame. The design of the seesaw and the swivel mounting enable the entire stack to be swiveled in the direction of the separating rollers.

Hierbei ist außerdem vorteilhaft, daß der Wippe eine Steuerbrücke zugeordnet ist, die aus einem oder mehreren unter Federkraft stehenden, schwenkbar mittels einer Achse in den Seitenteilen des Geräterahmens gelagerten Hebeln besteht. Unabhängig von der Höhe des Blattstapels wird daher die Wippe stets in Richtung gegen die Vereinzelungsrollen geschwenkt, wobei die Anpreßkraft nahezu konstant gehalten wird.It is also advantageous that the rocker is assigned a control bridge, which consists of one or more spring-loaded levers pivoted by means of an axle in the side parts of the device frame. Regardless of the height of the stack of sheets, the rocker is therefore always pivoted in the direction of the separating rollers, the contact pressure being kept almost constant.

Ein weiteres Merkmal der Erfindung besteht darin, daß die Wippe als Führung für eine auf Papierbreite einstellbare Führungswand dient.Another feature of the invention is that the rocker serves as a guide for a guide wall adjustable to paper width.

Die Antriebsübertragung für die Vereinzelungsrollen wird nach weiteren Erfindungsmerkmalen dahingehend vorgenommen, daß die Vereinzelungsrollen auf einer durch die Schreibwalze antreibbaren Achse angeordnet sind und daß die Antriebsbewegung mittels einer elektromagnetischen Kupplung bzw. mittels eines Antriebszuges in die zwei Drehrichtungen übertragbar ist.The drive transmission for the separating rollers is carried out according to further features of the invention in that the separating rollers are arranged on an axis that can be driven by the platen roller and that the drive movement can be transmitted in the two directions of rotation by means of an electromagnetic clutch or by means of a drive train.

Vorteilhafterweise ist ferner vorgesehen, daß ein vorderer Anschlag und die Sperrfinger auf übereinanderliegenden Achsen aangeordnet sind.Advantageously, it is further provided that a front stop and the locking fingers are arranged on superposed axes.

Um eine Rückwärtsbewegung der einzelnen Blätter zu begrenzen und gleichzeitig das Aufwölben in Längsrichtung der Einzelblätter zu unterstützen ist außerdem noch vorgeschlagen, daß ein hinterer Anschlag für jeweils ein Einzelblatt vorgesehen ist.In order to limit a backward movement of the individual sheets and at the same time to support the arching in the longitudinal direction of the individual sheets, it is also proposed that a rear stop is provided for one single sheet.

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

  • Fig. 1 eine Draufsicht auf die gesamte Vorrichtung in ihrer Anwendung auf einen Matrixdrucker und
  • Fig. 2 einen Schnitt A - B entsprechend der Schnittangabe in Fig. 1.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
  • Fig. 1 is a plan view of the entire device in its application to a matrix printer and
  • FIG. 2 shows a section A - B corresponding to the section in FIG. 1.

In einem Geräterahmen, wie solche bei Matrixdruckern verwendet werden, sind in den Seitenteilen 1 und 2 die Achsen 3,4, 5 drehbar gelagert.In a device frame, such as those used in matrix printers, the axes 3, 4, 5 are rotatably mounted in the side parts 1 and 2.

Auf der Achse 3 befindet sich eine Wippe 31, die aus den Führungswänden 6 und 7 und den darin fest eingepreßten oder lose eingelegten Distanzstangen 8 besteht. Eine weitere Führungswand 9 kann auf der Achse 3 bzw. der Distanzstange 8 der gewünschten Papierbreite entsprechend seitlich verschoben und mittels eines nicht näher beschriebenen Feststellhebels auf der Achse 3 verriegelt werden. An den Führungswänden 6 und 9 sind in rückwärtiger Position Anschlagwinkel 10 und 11 vorgesehen, die in Raststellungen oder stufenlos verschiebbar sind und nach der jeweiligen Länge des Einzelblattes bzw. eines einzelnen Formulars eingestellt werden.On the axis 3 there is a rocker 31 which consists of the guide walls 6 and 7 and the spacer rods 8 which are firmly pressed or loosely inserted therein. Another guide wall 9 can be laterally displaced on the axis 3 or the spacer bar 8 according to the desired paper width and locked on the axis 3 by means of a locking lever (not described in more detail). On the guide walls 6 and 9 stop angles 10 and 11 are provided in the rear position, which can be shifted into locking positions or steplessly and are adjusted according to the respective length of the single sheet or a single form.

Auf der Achse 4 befinden sich die Vereinzelungsrollen 17 sowie weitere noch zu beschreibende Antriebsteile.The separating rollers 17 and further drive parts to be described are located on the axis 4.

Unter Einbeziehung der Achse 5 ist eine Steuerbrücke 32 gebildet, die aus den äußeren Hebeln 12, die mit der Achse 5 fest verbunden sind, und einer Achse 13 gebildet ist. Die Achse 13 steht über die Langlöcher 6a mit den Führungswänden 6, 7 und 9 der Wippe 31 in Eingriff. Von zwei Zugfedern 14 wird die Steuerbrücke 32 im Uhrzeigersinn verschwenkt und nimmt durch die Achse 13 die darauf gelagerte Wippe 31 mit. Hierbei kommt der auf den Führungsleisten 15 gelagerte Formularstapel 16 zur Anlage an die auf der Achse 4 befindlichen Vereinzelungsrollen 17. Die Anpreßkraft bleibt hierbei immer konstant, auch wenn sich die Höhe des Formularstapels 16 ändert.Including the axis 5, a control bridge 32 is formed, which is formed from the outer levers 12, which are fixedly connected to the axis 5, and an axis 13. The axis 13 is in engagement with the guide walls 6, 7 and 9 of the rocker 31 via the elongated holes 6a. The control bridge 32 is pivoted clockwise by two tension springs 14 and takes the rocker 31 supported thereon by the axis 13. Here, the stack of forms 16 supported on the guide strips 15 comes to rest against the separating rollers 17 located on the axis 4. The contact pressure remains constant, even if the height of the stack of forms 16 changes.

Die eine Begrenzung für den Formularstapel 16 bilden zwei vordere Anschläge 18, die auf der Achse 19 gelagert sind.The one limitation for the stack of forms 16 is formed by two front stops 18 which are mounted on the axis 19.

Die Vorrichtung wird u. a. von dem Kupplungsrad 20 angetrieben, das über einen Getriebezug 21 mit einem fest mit der Schreibwalze 22 verbundenen Zahnrad 23 in Eingriff steht. Das Kupplungsrad 20 ist Teil der elektromagnetischen Kupplung 24, die bei Bestromung die von der Schreibwalze 22 ausgehende Drehbewegung in gleicher Drehrichtung auf die Achse 4 überträgt.The device is u. a. driven by the clutch wheel 20, which is in engagement via a gear train 21 with a gear 23 which is fixedly connected to the platen roller 22. The clutch wheel 20 is part of the electromagnetic clutch 24 which, when energized, transmits the rotary movement emanating from the platen roller 22 to the axis 4 in the same direction of rotation.

Nachfolgend wird die Wirkungsweise der Vorrichtung beschrieben:

  • Wenn ein Einzelblatt bzw. ein Einzelformular zugeführt werden sollen, werden anfangs gleichzeitig die elektromagnetische Kupplung 24 bestromt und die Schreibwalze 22 der Büromaschine um eine festprogrammierte Wegstrecke im Gegenuhrzeigersinn gedreht (Figur 2). Hierbei ist die Achse 4 über die elektromagnetische Kupplung 24 eingeschaltet, so daß die Bewegung in Gegenrichtung über den Getriebezug 21 von der Schreibwalze 22 übertragen werden kann. Über das mit der Schreibwalze 22 verbundene Zahnrad 23 und den beschriebenen Getriebezug 21 wird das Kupplungszahnrad 20 mitgenommen, das wiederum die Achse 4 antreibt. Somit werden auch die auf der Achse 4 befindlichen Vereinzelungsrollen 17 im Gegenuhrzeigersinn bewegt.
The mode of operation of the device is described below:
  • If a single sheet or a single form are to be fed, the electromagnetic clutch 24 is initially energized at the same time and the platen roller 22 of the office machine is rotated counterclockwise by a fixed distance (FIG. 2). Here, the axis 4 is switched on via the electromagnetic clutch 24, so that the movement in the opposite direction can be transmitted via the gear train 21 from the platen roller 22. Via the gear 23 connected to the platen roller 22 and the gear train 21 described, the clutch gear 20 is driven, which in turn drives the axis 4. Thus, the separating rollers 17 located on the axis 4 are also moved counterclockwise.

Das jeweils obere Blatt vom Formularstapel 16, das durch die. federschlüssige Bewegung der Achse 13 an den Vereinzelungsrollen 17 anliegt, wird infolge dieser Drehbewegung in der ersten Phase nach hinten geschoben bis zur Anlage an die hinteren Anschläge 10 und 11. In der zweiten Phase wird das jeweils obere Blatt aus dem Überdeckungsbereich der Sperrfinger 25 als Papierniederhaltung herausgenommen und durch die Oberflächenkrümmung der Führungsleisten 15 zu einer noch größeren Bauchausbildung in Längsrichtung gezwungen. Beim Austritt des jeweils oberen Blattes aus den Sperrfingern 25 können sich gleichzeitig die nach unten gehaltenen seitlichen Blattecken zurückbiegen, nachdem sie vorher durch den Höhenversatz von den Vereinzelungsrollen zu den Sperrfingern 25 quergekrümmt waren.The top sheet of the form stack 16, which by the. resilient movement of the axis 13 abuts the separating rollers 17, is pushed back as a result of this rotary movement in the first phase until it rests against the rear stops 10 and 11. In the second phase, the upper sheet from the overlap area of the locking fingers 25 is used as paper hold-down removed and forced by the surface curvature of the guide strips 15 to an even larger belly formation in the longitudinal direction. When the respective upper sheet emerges from the blocking fingers 25, the side sheet corners held down can bend back at the same time, after having previously been displaced by the height offset of the separating rollers to the locking fingers 25 were curved.

Bei der Umkehrbewegung der Schreibwalze 22 werden über die beschriebenen Antriebselemente auch die Achse 4 mit den Vereinzelungsrollen 17 im Uhrzeigersinn, d. h. in Vorschubrichtung für die Einzelblatter gedreht. Die Vereinzelungsrollen 17 schieben das Blatt bis in den Wirkungsbereich der Schreibwalze 22, danach schaltet die elektromagnetische Kupplung 24 ab. Hierbei wird das sich an den Ecken zurückbiegende jeweils obere Formular über die Sperrfinger 25 hinwegtransportiert und durch ein Leitblech 26 den Friktionsrollen 27 zugeführt.During the reversing movement of the platen roller 22, the axis 4 with the separating rollers 17 are turned clockwise, ie. H. rotated in the feed direction for the single sheets. The separating rollers 17 push the sheet into the effective range of the platen roller 22, after which the electromagnetic clutch 24 switches off. In this case, the top form, which bends back at the corners, is transported over the blocking fingers 25 and fed to the friction rollers 27 through a guide plate 26.

Im Bereich des oberen Leitbleches 28 ist ein Sensor 29 angeordnet, der die Vorderkante des Einzelblattes abfühlt und damit eine vorprogrammierte Reversierbewegung einleitet, die das Einzelblatt in die gewünschte Druckposition befördert.In the area of the upper guide plate 28, a sensor 29 is arranged, which senses the front edge of the single sheet and thus initiates a preprogrammed reversing movement which conveys the single sheet into the desired printing position.

Der Auswurf des bedruckten Einzelblattes bzw. Formulars erfolgt in ein wegklappbares Ablagefach 30, dessen Vorteil darin liegt, daß man beim Einlegen des Formularstapels 16 volle Einsicht auf den Formularstapel hat.The printed single sheet or form is ejected into a fold-away storage compartment 30, the advantage of which is that when the stack of forms 16 is inserted, one has full view of the stack of forms.

Nach dieser beschriebenen Einzelblattzuführung lassen sich ebenfalls mehrlagige Formularsätze zuführen.After this described single sheet feeder, multilayer form sets can also be fed.

Es ist auch möglich, bei der beschriebenen Vorrichtung über ein zweites Papierreservoir einen zusätzlichen Formular- oder Kuvertstapel zu bevorraten, der entsprechend einer Programmierung abrufbar ist.It is also possible in the device described to store an additional stack of forms or envelopes via a second paper reservoir, which stack can be called up in accordance with a programming.

Claims (9)

1. Device for the feeding of individual sheets from a stack of sheets into the guide channel, associated with a platen (22), by means of drivable separation rolls (17), a stack base which is movable towards the separation rolls (17) and stops (10,11,18) for the stack of sheets and also blocking fingers (25) separating the individual sheets and associated opposite the separation rolls (17) in the lateral margin regions of the stack of sheets (16),
characterized in that
the stack base is formed from one or more guide strips (15) arranged symmetrically to the centre of the individual sheet, with which strips there is associated in each case a drivable separation roll (17) lying opposite in the reginn of an anterior stop (18), and that the separation rolls (17) at the beginning of the separation process are rotatably drivable at least by the path of the covering through the blocking fingers (25) against the feed direction of an individual sheet.
2. Device according to Claim 1,
characterized in that
the guide strips (15) of the stack base form bearing surfaces adjoining each other at an obtuse angle.
3. Device according to Claims 1 and 2,
characterized in that
the guide strips (15), guide walls (6 and 7) running laterally parallel and spacer bars (8) are united into a rocker (31) which is nivotally mounted by means of a swivel axis (3) in the side pieces (1,2) of the frame of the apparatus.
4. Device according to Claim 3,
characterized in that
associated with the rocker (31) is a control bridge (32), which consists of one or more levers (12) which are under spring tension and are pivotably mounted by means of an axis (5) in the side pieces (1 and 2) of the frame of the apparatus.
5. Device according to Claims 3 or 4,
charicterized in that
the rocker (31) serves as a guide for a guide wall (9) which is able to be adjusted to the width of the paper.
6. Device according to Claims 1 to 5,
characterized in that
the separation rolls (17) are arranged on an axis (4) which is drivable by the platen (22) and that the drivinc movementis able to be transferred into the two directions of rotation by means of an electromagnetic coupling (24) or respectively by means of a drive train (21).
7. Device according to one or more of Claims 1 to 6,
characterized in that
an anterior stop (18) and the blocking fingers (25) are arranged on axes which lie one over the other.
8. Device according to Claims 1 to 7,
characterized in that
rear stop (10, 11) is provided.
EP83730101A 1982-12-17 1983-10-24 Device for feeding single sheets from a pile of sheets Expired EP0112276B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3247341 1982-12-17
DE19823247341 DE3247341A1 (en) 1982-12-17 1982-12-17 DEVICE FOR INPUTING SINGLE SHEETS FROM A STACK OF SHEETS

Publications (3)

Publication Number Publication Date
EP0112276A2 EP0112276A2 (en) 1984-06-27
EP0112276A3 EP0112276A3 (en) 1985-07-17
EP0112276B1 true EP0112276B1 (en) 1987-11-25

Family

ID=6181309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730101A Expired EP0112276B1 (en) 1982-12-17 1983-10-24 Device for feeding single sheets from a pile of sheets

Country Status (3)

Country Link
US (1) US4613124A (en)
EP (1) EP0112276B1 (en)
DE (2) DE3247341A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3568732D1 (en) * 1984-07-09 1989-04-20 Siemens Ag Paper supply holder for printing mechanisms having distance elements arranged on the depositing surface
US4795145A (en) * 1986-09-22 1989-01-03 Centronics Data Computer Corporation Cut sheet paper mechanism
DE3844325A1 (en) * 1988-12-27 1990-06-28 Mannesmann Ag DEVICE FOR THE INPUT OF SINGLE SHEETS IN OFFICE MACHINES, ESPECIALLY IN MATRIX PRINTERS
JPH06164854A (en) * 1992-11-19 1994-06-10 Canon Inc Copying machine and its method
US6357740B1 (en) * 1998-11-30 2002-03-19 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
JP2008280162A (en) * 2007-05-14 2008-11-20 Seiko Epson Corp Paper feeder
JP6115431B2 (en) * 2013-09-27 2017-04-19 ブラザー工業株式会社 Sheet conveying apparatus and image reading apparatus
JP2023122273A (en) * 2022-02-22 2023-09-01 株式会社リコー Sheet feeding device, laminate processing device, image forming device and image forming system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599972A (en) * 1969-07-23 1971-08-17 Pitney Bowes Inc Paper tray for photocopy machine
US4023792A (en) * 1971-12-08 1977-05-17 Xerox Corporation Sheet feeding apparatus
US3857558A (en) * 1973-06-21 1974-12-31 Xerox Corp Paper cassette design with irregular bottom
US3883133A (en) * 1973-09-17 1975-05-13 Xerox Corp Movable pack advancer
US3866901A (en) * 1973-10-01 1975-02-18 Xerox Corp Reverse buckle feeder
CH611577A5 (en) * 1976-04-05 1979-06-15 Kurt Ruenzi Device on an office machine for the automatic feeding thereof with sheets
US4089402A (en) * 1976-07-01 1978-05-16 Hy Grip Products Co. Sheet feeding mechanism for an automatic typewriter
DE2735223C2 (en) * 1977-08-04 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Device for moving sheet-shaped recording media from or to stacks of sheets
CH620652A5 (en) * 1978-01-23 1980-12-15 Rutishauser Data Ag
DE2816448C3 (en) * 1978-04-15 1981-01-08 Helmut 7210 Rottweil Steinhilber Device for feeding sheets of paper for an office writing machine
CH637899A5 (en) * 1979-05-29 1983-08-31 Albert Rutishauser Transport device for sheet-like recording media
JPS55160613A (en) * 1979-06-01 1980-12-13 Nec Corp Paper feeding mechanism
CH639345A5 (en) * 1979-09-07 1983-11-15 Kurt Ruenzi FEEDING DEVICE FOR PAPER SHEETS FOR A COPIER.
US4492371A (en) * 1980-02-22 1985-01-08 Canon Kabushiki Kaisha Feeding device

Also Published As

Publication number Publication date
US4613124A (en) 1986-09-23
EP0112276A2 (en) 1984-06-27
EP0112276A3 (en) 1985-07-17
DE3247341C2 (en) 1988-08-25
DE3247341A1 (en) 1984-06-20
DE3374674D1 (en) 1988-01-07

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