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EP0280643B1 - Paper feeding device for an office machine, in particular a matrix printer - Google Patents

Paper feeding device for an office machine, in particular a matrix printer Download PDF

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Publication number
EP0280643B1
EP0280643B1 EP88730030A EP88730030A EP0280643B1 EP 0280643 B1 EP0280643 B1 EP 0280643B1 EP 88730030 A EP88730030 A EP 88730030A EP 88730030 A EP88730030 A EP 88730030A EP 0280643 B1 EP0280643 B1 EP 0280643B1
Authority
EP
European Patent Office
Prior art keywords
pair
tractors
lever
paper
tractor
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 - Lifetime
Application number
EP88730030A
Other languages
German (de)
French (fr)
Other versions
EP0280643A2 (en
EP0280643A3 (en
Inventor
Gerd Nolte
Erich Steppe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT88730030T priority Critical patent/ATE71026T1/en
Publication of EP0280643A2 publication Critical patent/EP0280643A2/en
Publication of EP0280643A3 publication Critical patent/EP0280643A3/en
Application granted granted Critical
Publication of EP0280643B1 publication Critical patent/EP0280643B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/26—Pin feeds
    • B41J11/30—Pin traction elements other than wheels, e.g. pins on endless bands

Definitions

  • the invention relates to a device for paper transport in an office machine, in particular in a matrix printer, with a pressure abutment mounted in side plates for single sheets or endless webs that can be transported by means of a friction drive, and with tractors provided in pairs for pulling or pushing operation for edge-punched endless webs.
  • Such paper transport devices are essentially required for two generally different types of paper: on the one hand, single sheets or endless webs are transported without perforations, and on the other hand tractors are used which, as the name suggests, work in train operation and are designed as attachments. Depending on whether you are working with single sheets (non-perforated continuous webs) or with perforated continuous webs, a special device is required to transport the paper.
  • the invention is therefore based on the object of providing a paper transport device for single sheets, non-perforated paper webs, edge-perforated paper webs, which can be brought into any desired printing position by a changeover process.
  • the stated object is achieved according to the invention in the paper transport device mentioned at the outset in that the pair of tractors can be driven by means of a tractor gearwheel which is non-rotatable on the tractor shaft and which can be placed in and apart from a nonpositive connection to the paper drive motor and in that the pair of tractors by means of a lever mechanism, based on the paper guide level is each pivotable in an approximately tangential direction to the circumference top or to the circumference bottom of the pressure abutment.
  • a paper transport device initially enables the tractors provided to be pulled or pushed.
  • overrun operation can advantageously be set by swiveling the pair of tractors to the underside of the pressure abutment and pulling operation by swiveling the pair of tractors to the top of the pressure abutment, the corresponding drive connection advantageously being created at the same time.
  • the pair of tractors can also be uncoupled from a drive by swiveling them.
  • the lever mechanism consists of a two-armed hand lever pivotally mounted on the side plate, on the second lever arm a link lever with a link guide for a link block is provided, the link block being fixedly arranged in the side plate and on the link lever there is a curve of the tractor pair.
  • the pivotable pair of tractors has an intermediate gear which engages in it.
  • the intermediate gearwheel is advantageously used to reverse the direction of rotation of the paper drive when changing over from push to pull operation.
  • tractor gear and the associated intermediate gear are rotatably mounted in a side wall having the curve guidance. This measure serves to minimize the effort in order to achieve the pivotability of the tractor pairs.
  • the curve guide for the tractor pair consists of a curve plate forming the side wall. While the side wall already receives the rotary bearings for the tractor gear and the idler gear, the cam guide is now also placed on this side wall at the same time, by designing it as a cam plate. This cam plate is used to control the swiveling movement of the tractor pairs.
  • link guide in the link lever consists of an approximately angular recess.
  • the movements of the tractors can advantageously be controlled here via the shape of this recess.
  • the matrix printer according to FIG. 1 has two side boards 1 and 2.
  • the side boards 1 and 2 are connected to each other by slide guide axes 3 and 4.
  • the print head carriage 6 carrying the matrix print head 5 is moved back and forth by a special slide drive.
  • a print abutment 7 is also attached, on which a record carrier 8, consisting of a single sheet 9, an endless web 10 (with or without edge perforation) or an edge-perforated endless web 11, rests for printing.
  • the print head carriage 6 can be adjusted to the correct distance from an ink ribbon and the recording medium 8 by means of a print head distance adjustment 12.
  • a tractor assembly 13 Arranged behind the pressure abutment 7 is a tractor assembly 13 which has two tractors 14a and 14b and a paper support 15.
  • the device 16 for the paper transport is located in the right rear area of the matrix printer.
  • the tractors 14a and 14b are laterally adjustable on a tractor shaft 17 and on a D-axis 18 and can be locked by means of eccentric levers 19.
  • Each of the tractors 14a, 14b has a tractor flap 20, under which the perforated endless web 11 is guided.
  • a first functional position is shown in FIG. 2.
  • a rotatable tractor gear 21 is assigned to the tractor pair 14a, 14b on the tractor shaft 17.
  • the direction of rotation of the pinion 23 is selected such that the tractor shaft 17 is driven in the thrust direction 24.
  • the pair of tractors 14a, 14b thus works in overrun mode.
  • the position of the individual components is determined as follows: On a second D-axis 25, which is rotatably mounted in the side plate 2, a two-armed hand lever 26 is seated, on the one lever arm 26a of which a link lever 27 is articulated.
  • the link lever 27 is equipped with a link guide 28 for a link block 29, the link block 29 being rigidly fastened in the side plate 2.
  • a curve guide 30 for the pair of tractors 14a, 14b bears against a straight and flat, cutting-like edge 27a of the link lever 27.
  • the hand lever 26, the lever arm 26a of the link lever 27, the edge 27a and the curve guide 30 form a lever mechanism 31.
  • the paper guide plane 32 runs approximately in a tangential direction 33 to the circumferential underside 34 of the pressure abutment 7 designed as a pressure roller 7a.
  • the pair of tractors 14a, 14b therefore pushes the perforated endless web 11 approximately tangentially on the circumferential underside 34 through a guide channel 35 and, if necessary, further pressure rollers (not shown) tangentially past the circumferential upper side 36 out of the matrix printer.
  • the first functional position thus connects the overrun operation with an edge-perforated endless web 11.
  • the hand lever 26 In a second functional position (FIG. 3), the hand lever 26 is in a position pivoted to the left from the vertical position, so that the lever arm 26a lifts the link lever 27 somewhat under the guide block 29 in the link guide 28.
  • the height production is determined by the link guide 28. This increase in production disengages the tractor gear 21 from the pinion 23, so that the tractor shaft 17 is no longer driven. Nevertheless, the edge-perforated endless web 11 can be kept on standby and can be brought into the printing position after the single sheet 9 or an endless web 10 has been extended (with or without edge perforation).
  • the pivotable pair of tractors 14a, 14b has, in addition to the tractor gearwheel 21, an intermediate gearwheel 37 which engages in it and which is rotatably mounted in a side wall 38 having the curve guide 30.
  • the side wall 38 is designed as a curved plate 39, i.e. it also carries the curve guide 30 on the outer circumference.
  • the hand lever 26 is now pivoted to the right out of the vertical position.
  • the link guide 28 in the link lever 27 also consists of an approximately angular recess 40.
  • the link block 29 gets into the other branch 29a of the link guide 28, whereby the lever arm 26a sets the link lever 27 very high, so that the edge 27a strongly raises the curve guide 30 of the tractor pair 14a, 14b.
  • the intermediate gear 37 comes into engagement with the pinion 23, drives the intermediate gear 37 and the tractor gear 21 and thus rotates the tractor shaft 17.

Landscapes

  • Handling Of Sheets (AREA)
  • Advancing Webs (AREA)
  • Handling Of Cut Paper (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

The device presupposes side plates (1,2) in which a platen roll (7) is mounted and, additionally, a friction drive (a pair of rolls) for single sheets (9) or continuous webs (10) not containing edge perforations which are to be transported and a pair of sprocket feed wheels (13) which operate in a push or pull mode. <??>In order to create a universal paper transport device for different types of paper, in which the respective paper type is ready for use, it is proposed that the pair of sprocket feed wheels (14a, 14b) is capable of being driven by a gear wheel (21) which is rotationally fixed to the sprocket wheel shaft (17) and which may be connected to and disconnected from the paper drive motor (22) by a friction coupling, and that by means of a lever mechanism (31) the pair of sprocket feed wheels (14a, 14b) can be swivelled with respect to the paper guidance plane in a direction (33) approximately tangential to the upper side of the circumference (36) or to the lower side of the circumference (34) of the platen roll. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung für den Papiertransport in einer Büromaschine, insbesondere in einem Matrixdrucker, mit einem in Seitenplatinen gelagerten Druckwiderlager für mittels eines Friktionsantriebes transportierbare Einzelblätter bzw. Endlosbahnen sowie mit paarweise vorgesehenen Traktoren im Zug- oder Schubbetrieb für randgelochte Endlosbahnen.The invention relates to a device for paper transport in an office machine, in particular in a matrix printer, with a pressure abutment mounted in side plates for single sheets or endless webs that can be transported by means of a friction drive, and with tractors provided in pairs for pulling or pushing operation for edge-punched endless webs.

Derartige Papiertransportvorrichtungen werden im wesentlichen für zwei generell unterschiedliche Papiersorten benötigt: Zum einen werden Einzelblätter bzw. Endlosbahnen ohne Perforationen transportiert und zum anderen werden Traktoren angewendet, die, wie der Name schon sagt, im Zugbetrieb arbeiten und als Aufsetzeinrichtungen ausgebildet sind. Je nachdem, ob mit Einzelblättern (nichtgelochten Endlosbahnen) oder mit randgelochten Endlosbahnen gearbeitet wird, ist demgemäß eine spezielle Vorrichtung erforderlich, die das Papier transpsortiert.Such paper transport devices are essentially required for two generally different types of paper: on the one hand, single sheets or endless webs are transported without perforations, and on the other hand tractors are used which, as the name suggests, work in train operation and are designed as attachments. Depending on whether you are working with single sheets (non-perforated continuous webs) or with perforated continuous webs, a special device is required to transport the paper.

Die Verwendung eines Friktionsantriebs (Druckwalzenpaar) oder eines Traktors (Traktorenpaar) ist noch davon abhängig, ob als Druckwiderlager eine Druckwalze oder ein undrehbar angeordneter Druckbalken vorgesehen wird.The use of a friction drive (pair of pressure rollers) or a tractor (pair of tractors) is still dependent on whether a pressure roller or a non-rotatably arranged pressure bar is provided as the pressure abutment.

Es ist bekannt (US-PS 2,140,028), für eine Papiertransportvorrichtung sowohl einen Friktionsantrieb als auch Traktoren vorzusehen. Die bekannte Vorrichtung ermöglicht jedoch nicht, außer dem Zugbetrieb den Traktor auch für Schubbetrieb einzusetzen, was bedeutet, daß die bekannte Vorrichtung nicht für mehrere Papiersorten gleichzeitig geeignet ist. Unter "gleichzeitig geeignet" wird hier verstanden, daß in vorteilhafter Weise mit unterschiedlichen Papiersorten gearbeitet werden kann, wobei die eine oder die andere Papiersorte jeweils in Wartepositionen, d.h. eingelegt in der Papiertransportvorrichtung vorhanden sind.It is known (US Pat. No. 2,140,028) to provide both a friction drive and tractors for a paper transport device. However, the known device does not make it possible to use the tractor for pushing operation in addition to pulling operation, which means that the known device is not suitable for several types of paper at the same time. “Suitable at the same time” is understood here to mean that advantageously it is possible to work with different types of paper, one or the other type of paper being present in waiting positions, ie inserted in the paper transport device.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Papiertransportvorrichtung für Einzelblätter, ungelochte Papierbahnen, randgelochte Papierbahnen, zu schaffen, die durch einen Umstellvorgang beliebig in Druckposition gebracht werden können.The invention is therefore based on the object of providing a paper transport device for single sheets, non-perforated paper webs, edge-perforated paper webs, which can be brought into any desired printing position by a changeover process.

Die gestellte Aufgabe wird bei der eingangs bezeichneten Papiertransportvorrichtung erfindungsgemäß dadurch gelöst, daß das Traktorenpaar mittels eines auf der Traktorwelle drehfesten Traktorenzahnrades antreibbar ist, das in und außer eine kraftschlüssige Verbindung mit dem Papierantriebsmotor setzbar ist und daß das Traktorenpaar mittels eines Hebelgetriebes, bezogen auf die Papierführungsebene jeweils in eine etwa tangentiale Richtung zur Umfang-Oberseite oder zur Umfang-Unterseite des Druckwiderlagers verschwenkbar ist. Eine solche Papiertransportvorrichtung ermöglicht zunächst Zug- oder Schubbetrieb der vorgesehenen Traktoren. Hierbei kann vorteilhafterweise Schubbetrieb durch Verschwenken des Traktorenpaare an die Unterseite des Druckwiderlagers und Zugbetrieb durch Verschwenken des Traktorenpaares an die Oberseite des Druckwiderlagers eingestellt werden, wobei gleichzeitig vorteilhafterweise die entsprechende Antriebsverbindung geschaffen wird. Andererseits kann das Traktorenpaar auch durch Verschwenken von einem Antrieb abgekuppelt werden.The stated object is achieved according to the invention in the paper transport device mentioned at the outset in that the pair of tractors can be driven by means of a tractor gearwheel which is non-rotatable on the tractor shaft and which can be placed in and apart from a nonpositive connection to the paper drive motor and in that the pair of tractors by means of a lever mechanism, based on the paper guide level is each pivotable in an approximately tangential direction to the circumference top or to the circumference bottom of the pressure abutment. Such a paper transport device initially enables the tractors provided to be pulled or pushed. In this case, overrun operation can advantageously be set by swiveling the pair of tractors to the underside of the pressure abutment and pulling operation by swiveling the pair of tractors to the top of the pressure abutment, the corresponding drive connection advantageously being created at the same time. On the other hand, the pair of tractors can also be uncoupled from a drive by swiveling them.

In Weiterbildung der Erfindung ist vorgesehen, daß das Hebelgetriebe aus einem an der Seitenplatine schwenkbar gelagerten, zweiarmigen Handhebel besteht, an dessen zweitem Hebelarm ein Kulissenhebel mit einer Kulissenführung für einen Kulissenstein vorgesehen ist, wobei der Kulissenstein fest in der Seitenplatine angeordnet ist und an dem Kulissenhebel eine Kurvenführung des Traktorpaares anliegt. Hiermit ist eine weitestgehende Zwangssteuerung beim Verschwenken des Traktorenpaares verbunden.In a further development of the invention it is provided that the lever mechanism consists of a two-armed hand lever pivotally mounted on the side plate, on the second lever arm a link lever with a link guide for a link block is provided, the link block being fixedly arranged in the side plate and on the link lever there is a curve of the tractor pair. Herewith is a largely forced control when pivoting the pair of tractors connected.

Eine andere Verbesserung der Erfindung sieht, vor, daß das verschwenkbare Traktorenpaar außer dem Traktorenzahnrad ein in dieses eingreifendes Zwischenzahnrad aufweist. Das Zwischenzahnrad wird vorteilhafterweise zur Drehrichtungsumkehr des Papierantriebes beim Umstellen von Schub- auf Zugbetrieb benutzt.Another improvement of the invention provides that in addition to the tractor gear, the pivotable pair of tractors has an intermediate gear which engages in it. The intermediate gearwheel is advantageously used to reverse the direction of rotation of the paper drive when changing over from push to pull operation.

Andere Maßnahmen der Erfindung bestehen darin, daß das Traktorenzahnrad und das zugehörige Zwischenzahnrad in einer die Kurvenführung aufweisenden Seitenwand drehgelagert sind. Diese Maßnahme dient der Minimierung des Aufwandes, um die Verschwenkbarkeit der Traktorenpaare zu erzielen.Other measures of the invention consist in the fact that the tractor gear and the associated intermediate gear are rotatably mounted in a side wall having the curve guidance. This measure serves to minimize the effort in order to achieve the pivotability of the tractor pairs.

Eine andere Ausgestaltung der Erfindung besteht darin, daß die Kurvenführung für das Traktorenpaar aus einer die Seitenwand bildenden Kurvenplatte besteht. Währenddem die Seitenwand bereits die Drehlagerungen für das Traktorenzahnrad und das Zwischenrad aufnimmt, wird nunmehr auch gleichzeitig die Kurvenführung an diese Seitenwand gelegt, indem diese als Kurvenplatte ausgebildet wird. Diese Kurvenplatte dient daher der Steuerung der Schwenkbewegung der Traktorenpaare.Another embodiment of the invention is that the curve guide for the tractor pair consists of a curve plate forming the side wall. While the side wall already receives the rotary bearings for the tractor gear and the idler gear, the cam guide is now also placed on this side wall at the same time, by designing it as a cam plate. This cam plate is used to control the swiveling movement of the tractor pairs.

Weiterhin ist vorgesehen, daß die Kulissenführung in dem Kulissenhebel aus einer etwa winkelförmigen Ausnehmung besteht. Vorteilhafterweise lassen sich hier die Bewegungen der Traktoren über die Form dieser Ausnehmung steuern.It is also provided that the link guide in the link lever consists of an approximately angular recess. The movements of the tractors can advantageously be controlled here via the shape of this recess.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt, das nachfolgend näher erläutert wird. Es zeigen

Fig. 1
als Anwendungsbeispiel einen Matrixdrucker in Draufsicht ohne das übliche Druckergehäuse,
Fig. 2
eine Seitenansicht der erfindungsrelevanten Baugruppe in Richtung A (wie in Fig. 1 bezeichnet) in vergrößertem Maßstab in einer ersten Funktionsstellung
Fig. 3
die Seitenansicht gemäß Fig. 2 in einer zweiten Funktionsstellung und
Fig. 4
die Seitenansicht gemäß Fig. 2 in einer dritten Funktionsstellung.

In the drawing, an embodiment of the invention is shown schematically, which is explained in more detail below. Show it
Fig. 1
as an application example a top view of a matrix printer without the usual printer housing,
Fig. 2
a side view of the assembly relevant to the invention in the direction A (as shown in Fig. 1) on an enlarged scale in a first functional position
Fig. 3
2 in a second functional position and
Fig. 4
the side view of FIG. 2 in a third functional position.

Der Matrixdrucker gemäß Fig. 1 weist zwei Seitenplatinen 1 und 2 auf. Die Seitenplatinen 1 und 2 sind durch Schlittenführungsachsen 3 und 4 miteinander verbunden. Der den Matrixdruckkopf 5 tragende Druckkopfschlitten 6 wird durch einen besonderen Schlittenantrieb hin- und herbewegt. In den Seitenplatinen 1 und 2 ist ferner ein Druckwiderlager 7 befestigt, auf dem ein Aufzeichnungsträger 8, bestehend aus einem Einzelblatt 9, einer Endlosbahn 10 (mit oder ohne Randlochung) oder aus einer randgelochten Endlosbahn 11, zum Bedrucken aufliegt.The matrix printer according to FIG. 1 has two side boards 1 and 2. The side boards 1 and 2 are connected to each other by slide guide axes 3 and 4. The print head carriage 6 carrying the matrix print head 5 is moved back and forth by a special slide drive. In the side boards 1 and 2, a print abutment 7 is also attached, on which a record carrier 8, consisting of a single sheet 9, an endless web 10 (with or without edge perforation) or an edge-perforated endless web 11, rests for printing.

Der Druckkopfschlitten 6 kann mittels einer Druckkopf-Abstandsverstellung 12 auf den richtigen Abstand zu einem Farbband und dem Aufzeichnungsträger 8 eingestellt werden. Hinter dem Druckwiderlager 7 ist eine Traktorbaugruppe 13 angeordnet, die zwei Traktoren 14a und 14b aufweist sowie eine Papierauflage 15.The print head carriage 6 can be adjusted to the correct distance from an ink ribbon and the recording medium 8 by means of a print head distance adjustment 12. Arranged behind the pressure abutment 7 is a tractor assembly 13 which has two tractors 14a and 14b and a paper support 15.

Die Vorrichtung 16 für den Papiertransport befindet sich in dem rechten hinteren Bereich des Matrixdruckers. Die Traktoren 14a und 14b sind auf einer Traktorwelle 17 und auf einer D-Achse 18 seitlich verstellbar und mittels Exzenterhebeln 19 feststellbar. Jeder der Traktoren 14a, 14b besitzt eine Traktorklappe 20, unter die die randgelochte Endlosbahn 11 geführt wird.The device 16 for the paper transport is located in the right rear area of the matrix printer. The tractors 14a and 14b are laterally adjustable on a tractor shaft 17 and on a D-axis 18 and can be locked by means of eccentric levers 19. Each of the tractors 14a, 14b has a tractor flap 20, under which the perforated endless web 11 is guided.

Eine erste Funktionsstellung ist in Fig. 2 dargestellt. Dem Traktorenpaar 14a, 14b ist auf der Traktorwelle 17 ein drehfestes Traktorenzahnrad 21 zugeordnet. Auf der Welle 22a eines Papierantriebsmotors 22 befindet sich ein Ritzel 23, in das das Traktorenzahnrad 21 eingreift. Hierbei ist die Drehrichtung des Ritzels 23 derart gewählt, daß die Traktorwelle 17 in Schubrichtung 24 angetrieben wird. Das Traktorenpaar 14a, 14b arbeitet hier also im Schubbetrieb. Die Lage der einzelnen Bauelemente wird hierbei wie folgt bestimmt: Auf einer zweiten D-Achse 25, die in der Seitenplatine 2 drehgelagert ist, sitzt ein zweiarmiger Handhebel 26, an dessen einem Hebelarm 26a ein Kulissenhebel 27 angelenkt ist. Der Kulissenhebel 27 ist mit einer Kulissenführung 28 für einen Kulissenstein 29 ausgerüstet, wobei der Kulissenstein 29 starr in der Seitenplatine 2 befestigt ist. An einer gerade und ebenen, schneidenartigen Kante 27a des Kulissenhebels 27 liegt eine Kurvenführung 30 für das Traktorenpaar 14a, 14b an.A first functional position is shown in FIG. 2. A rotatable tractor gear 21 is assigned to the tractor pair 14a, 14b on the tractor shaft 17. On the shaft 22a of a paper drive motor 22 there is a pinion 23, in which the tractor gear 21 engages. Here, the direction of rotation of the pinion 23 is selected such that the tractor shaft 17 is driven in the thrust direction 24. The pair of tractors 14a, 14b thus works in overrun mode. The position of the individual components is determined as follows: On a second D-axis 25, which is rotatably mounted in the side plate 2, a two-armed hand lever 26 is seated, on the one lever arm 26a of which a link lever 27 is articulated. The link lever 27 is equipped with a link guide 28 for a link block 29, the link block 29 being rigidly fastened in the side plate 2. A curve guide 30 for the pair of tractors 14a, 14b bears against a straight and flat, cutting-like edge 27a of the link lever 27.

Der Handhebel 26 dessen Hebelarm 26a der Kulissenhebel 27, die Kante 27a und die Kurvenführung 30 bilden ein Hebelgetriebe 31.The hand lever 26, the lever arm 26a of the link lever 27, the edge 27a and the curve guide 30 form a lever mechanism 31.

In der ersten Funktionsstellung gemäß Fig. 2 verläuft die Papierführungsebene 32 etwa in einer tangentialen Richtung 33 zur Umfangs-Unterseite 34 des als Druckwalze 7a ausgebildeten Druckwiderlagers 7. Das Traktorenpaar 14a, 14b schiebt daher die randgelochte Endlosbahn 11 etwa tangential an der Umfangs-Unterseite 34 durch einen Führungskanal 35 und erforderlichenfalls an weiteren Anpreßrollen (nicht gezeichnet) vorbei tangential an der Umfangs-Oberseite 36 wieder aus dem Matrixdrucker. Die erste Funktionsstellung verbindet somit den Schubbetrieb mit einer randgelochten Endlosbahn 11.2, the paper guide plane 32 runs approximately in a tangential direction 33 to the circumferential underside 34 of the pressure abutment 7 designed as a pressure roller 7a. The pair of tractors 14a, 14b therefore pushes the perforated endless web 11 approximately tangentially on the circumferential underside 34 through a guide channel 35 and, if necessary, further pressure rollers (not shown) tangentially past the circumferential upper side 36 out of the matrix printer. The first functional position thus connects the overrun operation with an edge-perforated endless web 11.

In einer zweiten Funktionsstellung (Fig. 3) befindet sich der Handhebel 26 in einer aus der senkrechten Position nach links geschwenkten Position, so daß der Hebelarm 26a den Kulissenhebel 27 unter Führung durch den Kulissenstein 29 in der Kulissenführung 28 etwas hochhebt. Die Höherstellung wird durch die Kulissenführung 28 bestimmt. Diese Höherstellung bringt das Traktorenzahnrad 21 außer Eingriff vom Ritzel 23, so daß die Traktorwelle 17 nicht mehr angetrieben wird. Trotzdem kann die randgelochte Endlosbahn 11 in Bereitschaft gehalten werden und nach Ausfahren des Einzelblattes 9 bzw. einer Endlosbahn 10 (mit oder ohne Randlochung) in Druckposition gebracht werden.In a second functional position (FIG. 3), the hand lever 26 is in a position pivoted to the left from the vertical position, so that the lever arm 26a lifts the link lever 27 somewhat under the guide block 29 in the link guide 28. The height production is determined by the link guide 28. This increase in production disengages the tractor gear 21 from the pinion 23, so that the tractor shaft 17 is no longer driven. Nevertheless, the edge-perforated endless web 11 can be kept on standby and can be brought into the printing position after the single sheet 9 or an endless web 10 has been extended (with or without edge perforation).

Das verschwenkbare Traktorenpaar 14a, 14b weist neben dem Traktorenzahnrad 21 ein in dieses eingreifendes Zwischenzahnrad 37 auf, das in einer die Kurvenführung 30 aufweisenden Seitenwand 38 drehgelagert ist. Die Seitenwand 38 ist hierbei als Kurvenplatte 39 ausgeführt, d.h. sie trägt gleichzeitig die Kurvenführung 30 am äußeren Umfang.The pivotable pair of tractors 14a, 14b has, in addition to the tractor gearwheel 21, an intermediate gearwheel 37 which engages in it and which is rotatably mounted in a side wall 38 having the curve guide 30. The side wall 38 is designed as a curved plate 39, i.e. it also carries the curve guide 30 on the outer circumference.

In einer dritten Funktionslage (Fig. 4) ist nun der Handhebel 26 aus der senkrechten Position heraus nach rechts verschwenkt. Die Kulissenführung 28 in dem Kulissenhebel 27 besteht außerdem aus einer etwa winkelförmigen Ausnehmung 40. Durch die Verschwenkung des Handhebels 26 gelangt der Kulissenstein 29 in den anderen Ast 29a der Kulissenführung 28, wodurch der Hebelarm 26a den Kulissenhebel 27 sehr hoch stellt, so daß die Kante 27a die Kurvenführung 30 des Traktorenpaares 14a, 14b stark anhebt. Dabei kommt das Zwischenzahnrad 37 in Eingriff mit dem Ritzel 23, treibt das Zwischenzahnrad 37 und das Traktorenzahnrad 21 an und dreht somit die Traktorwelle 17. Die Drehung zieht die randgelochte Endlosbahn 11 aus einem Papiervorrat 41 um das Druckwiderlager 7, wobei das Traktorenpaar 14a, 14b im Zugbetrieb arbeitet und wobei das Traktorenpaar 14a, 14b in die tangentiale Richtung 22 zur Umfangs-Oberseite 36 des Druckwiderlagers 7 verschwenkt wird. Gleichzeitig wird durch das stets in derselben Richtung drehende Ritzel 23 mittels des Zwischenzahnrades 37 die Drehrichtung des Traktorenzahnrades 21 auf "Zug" umgestellt. In dieser Position ist das Traktorenpaar 14a, 14b von einem Anschlag 42 im Gegensatz zur ersten Funktionsstellung (Fig. 1) um einen erheblichen Betrag entfernt. Jede der drei Funktionsstellungen kann auch noch durch Federkraft unterstützt werden.In a third functional position (FIG. 4), the hand lever 26 is now pivoted to the right out of the vertical position. The link guide 28 in the link lever 27 also consists of an approximately angular recess 40. By pivoting the hand lever 26, the link block 29 gets into the other branch 29a of the link guide 28, whereby the lever arm 26a sets the link lever 27 very high, so that the edge 27a strongly raises the curve guide 30 of the tractor pair 14a, 14b. The intermediate gear 37 comes into engagement with the pinion 23, drives the intermediate gear 37 and the tractor gear 21 and thus rotates the tractor shaft 17. The rotation pulls the edge-perforated endless web 11 from a paper supply 41 around the pressure abutment 7, the tractor pair 14a, 14b works in train operation and the pair of tractors 14a, 14b is pivoted in the tangential direction 22 to the circumferential upper side 36 of the pressure abutment 7. At the same time, the rotating direction of the pinion 23 by means of the intermediate gear 37 always rotates in the same direction Tractor gear 21 switched to "train". In this position, the pair of tractors 14a, 14b is a considerable amount away from a stop 42, in contrast to the first functional position (FIG. 1). Each of the three functional positions can also be supported by spring force.

Claims (5)

1. Device for feeding paper in an office machine, in particular in a matrix printer, having a print counter-surface (7) mounted in side plates (1, 2) for individual sheets (9) or endless webs which can be fed by means of a friction drive, and also having tractors (14a, 14b) provided in pairs in pull or push operation for perforated-margin endless webs (10, 11), wherein the pair of tractors (14a, 14b) can be driven by means of a tractor gear wheel (21) which is resistant to rotation on the tractor shaft (17), which wheel can be set in and taken out of a non-positive connection with the paper drive motor (22), and, relative to the plane of guidance (32) of the paper, can be pivoted each time into an approximately tangential direction (33) to the upper periphery side (36) or to the lower periphery side (24) of the print counter-surface (7), characterised in that the pair of tractors (14a, 14b) is adjustable by means of a lever gear (31) and that the lever gear (31) consists of a two-armed hand lever (26) pivotably mounted on the side plate (2), on the second lever arm (26a) of which lever a slotted lever (27) with a sliding guide (28) for a sliding block (29) is provided, the sliding block (29) being located securely in the side plate (2) and a cam guide (30) of the pair of tractors (14a, 14b) bearing against the slotted lever (27).
2. Device according to Claim 1, characterised in that the pivotable pair of tractors (14a, 14b) in addition to the tractor gear wheel (21) has an intermediate gear wheel (37) which engages therein.
3. Device according to Claims 1 and 2, characterised in that the tractor gear wheel (21) and the associated intermediate gear wheel (37) are rotationally mounted in a side wall (38) bearing the cam guide (30).
4. Device according to Claims 1 to 3, characterised in that the cam guide (30) for the pair of tractors (14a, 14b) consists of a cam plate (39) forming the side wall (38).
5. Device according to Claims 1 to 4, characterised in that the sliding guide (28) in the slotted lever (27) consists of an approximately angular recess (40).
EP88730030A 1987-02-24 1988-02-08 Paper feeding device for an office machine, in particular a matrix printer Expired - Lifetime EP0280643B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88730030T ATE71026T1 (en) 1987-02-24 1988-02-08 DEVICE FOR PAPER TRANSPORT IN AN OFFICE MACHINE, IN PARTICULAR IN A MATRIX PRINTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873705856 DE3705856A1 (en) 1987-02-24 1987-02-24 DEVICE FOR PAPER TRANSPORT IN A OFFICE MACHINE, ESPECIALLY IN A MATRIX PRINTER
DE3705856 1987-02-24

Publications (3)

Publication Number Publication Date
EP0280643A2 EP0280643A2 (en) 1988-08-31
EP0280643A3 EP0280643A3 (en) 1989-04-26
EP0280643B1 true EP0280643B1 (en) 1992-01-02

Family

ID=6321635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730030A Expired - Lifetime EP0280643B1 (en) 1987-02-24 1988-02-08 Paper feeding device for an office machine, in particular a matrix printer

Country Status (5)

Country Link
US (1) US4896979A (en)
EP (1) EP0280643B1 (en)
JP (1) JPS63252769A (en)
AT (1) ATE71026T1 (en)
DE (2) DE3705856A1 (en)

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US5037222A (en) * 1989-08-29 1991-08-06 Genicom Corporation Printer and cartridge assembly therefor
DE4011685A1 (en) * 1990-04-06 1991-10-17 Mannesmann Ag METHOD AND DEVICE FOR POSITIONING THE START OF A CONTINUOUS TRACK IN PUSH-BIKE TRACTOR OPERATION IN A PRINTER
JP2751621B2 (en) * 1990-10-31 1998-05-18 ブラザー工業株式会社 Printer
JP3028107B2 (en) * 1991-04-11 2000-04-04 ブラザー工業株式会社 Printer continuous sheet switching device
US5217312A (en) * 1992-05-19 1993-06-08 Lexmark International, Inc. Single lever push/pull/park selector for printer forms tractor
US5594569A (en) * 1993-07-22 1997-01-14 Semiconductor Energy Laboratory Co., Ltd. Liquid-crystal electro-optical apparatus and method of manufacturing the same
US7066670B2 (en) * 2004-02-10 2006-06-27 Tallygenicom Lp Printing method and apparatus
US8674941B2 (en) * 2008-12-16 2014-03-18 Dell Products, Lp Systems and methods for implementing haptics for pressure sensitive keyboards

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JPS60155U (en) * 1983-06-17 1985-01-05 ブラザー工業株式会社 Printing device paper feeding device
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Also Published As

Publication number Publication date
EP0280643A2 (en) 1988-08-31
DE3705856C2 (en) 1989-07-13
ATE71026T1 (en) 1992-01-15
DE3705856A1 (en) 1988-09-01
JPS63252769A (en) 1988-10-19
US4896979A (en) 1990-01-30
DE3867254D1 (en) 1992-02-13
EP0280643A3 (en) 1989-04-26

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