EP0308566A1 - Office machine, in particular matrix printer, with print head/platen-gap adjustment - Google Patents

Office machine, in particular matrix printer, with print head/platen-gap adjustment Download PDF

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Publication number
EP0308566A1
EP0308566A1 EP87730110A EP87730110A EP0308566A1 EP 0308566 A1 EP0308566 A1 EP 0308566A1 EP 87730110 A EP87730110 A EP 87730110A EP 87730110 A EP87730110 A EP 87730110A EP 0308566 A1 EP0308566 A1 EP 0308566A1
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EP
European Patent Office
Prior art keywords
locking plate
locking
print head
toothing
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87730110A
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German (de)
French (fr)
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EP0308566B1 (en
Inventor
Stefan Dipl.-Ing. Bischof (Fh)
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
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to EP87730110A priority Critical patent/EP0308566B1/en
Priority to AT87730110T priority patent/ATE83439T1/en
Priority to DE8787730110T priority patent/DE3783135D1/en
Priority to US07/248,488 priority patent/US4906115A/en
Publication of EP0308566A1 publication Critical patent/EP0308566A1/en
Application granted granted Critical
Publication of EP0308566B1 publication Critical patent/EP0308566B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B41J25/3088—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms with print gap adjustment means on the printer frame, e.g. for rotation of an eccentric carriage guide shaft
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Definitions

  • the invention relates to an office machine, in particular a Marix printer, with a device for setting the smallest writing distance between a print head and a platen, which has a front and a rear carriage guide axis, on which the carriage with the print head is guided in front of the platen, the front Carriage guide axis is adjustably supported against the writing abutment in side boards.
  • Such "basic settings" between a printhead and a writing abutment correspond to the functionally important distance of the printing elements, so that the distance can no longer be changed by the user in the sense of a reduction.
  • a matrix needle printhead in which the stroke of the printing needles is approximately 0.2 to 0.5 mm may serve as an example. A distance smaller than 0.2 mm would therefore no longer be possible here, regardless of the paper thickness selected by the user. After such a “basic setting" has been made in the manufacturing plant, the user can no longer set this minimum distance smaller.
  • the slide guide axis is guided in sliding blocks which are provided on the side boards of the printer frame.
  • the slide guide axis is guided towards or away from the writing abutment.
  • the slide guide axis is screwed to the side boards.
  • the object of the invention is to reduce the number of simple parts when designing them, to achieve simple assembly and quick and reliable adjustment.
  • the stated object is achieved in the office machine described in the introduction in that the front carriage guide axis is rotatably supported in the side boards by means of eccentrics, in that an adjusting lever is fastened on the front carriage guide axis outside a side board, that a locking plate is assigned to the adjusting lever on the side board , Which has a rear and a front stop for the actuating lever and that the locking plate is adjustable in a guide after releasing a lock between the locking plate and side plate by an acute angle about the horizontal axis of the front carriage guide thing, the position of the front stop the minimum distance of the Print head from the abutment corresponds.
  • the control lever only a single component, namely the locking plate, is required, which combines several functions.
  • the locking plate can be attached as a compact part in the side board with little effort, it can be made adjustable and self-locking.
  • the stops can also already be part of the locking plate.
  • This locking plate can now be used in two different functions: On the one hand, the basic setting mentioned is carried out by sliding and the locking plate and, on the other hand, the user can still determine the distance of the print head from the platen according to the number of paper layers used by moving the adjusting lever. Nevertheless, a minimum distance, the so-called basic setting to the abutment, is guaranteed.
  • the locking plate is clipped into the respective side plate. Such a fastening design nevertheless allows the locking plate to be adjusted in the guide mentioned.
  • the locking plate has a radial toothing for the paper thickness adjustment on the end face and that the radial toothing has at least one locking tooth on the adjusting lever opposite.
  • the locking plate therefore takes over the function of setting the paper thickness for the user.
  • the locking between the side plate and the locking plate is formed from a toothing provided on a boundary edge of an arcuate opening in the side plate and a counter toothing provided on the locking plate, the counter toothing being arranged on a resilient lever part of the locking plate.
  • the lock can therefore be released and re-engaged with the simplest of means.
  • a printer frame consists of side boards 1 and 2, between which a writing abutment 3 and a front carriage guide axis 4 and a rear carriage guide axis 5 are fastened.
  • the carriage 6 is moved back and forth by means of a cable or belt drive 8 with a cable or belt 9.
  • the printhead 7 is located with the printing elements at a basic distance 10 from the surface of the recording medium which is currently resting on the abutment 3.
  • the front slide guide axis 4 is fastened in the side boards 1, 2 in each case by means of eccentrics 11 (FIG. 2).
  • eccentrics 11 On the eccentrics 11, an adjusting lever 12 is rotatably attached.
  • a locking plate 13 is attached to the wall surface of the side board 1.
  • the locking plate 13 can be injection molded from a one-piece plastic part made of plastic that can be plasticized.
  • a rear stop 14 and a front stop 15 are integrally formed on the locking plate 13.
  • a lock 16 described in more detail below is provided, the effect being extended to an acute angle 17.
  • the locking plate 13 is pivotable about the horizontal axis 11a of the slide guide axis 4 in a guide 18.
  • the guide 18 is formed here in each case by pins 19, which are also integrally formed on the locking plate 13 and elongated holes 20 in the side plate 1 (or 2).
  • the locking plate 13 is clipped into the respective side plate 1 or 2, the pins 19 being further developed into radially resilient pressure pins 21 (FIG. 5).
  • the locking plate 13 also has a radial toothing 22 for the paper thickness adjustment, here the setting lever 12 is moved in the directions 23 and 24 if the user wants to readjust the distance of the print head 7 to the paper surface on the abutment 3. Because of the larger adjustment path for different paper thicknesses, this radial toothing 22 is dimensioned correspondingly larger (FIG. 3).
  • the radial toothing 22 is located on the end face 25 of the locking plate 13; Opposite there is at least one locking tooth 26 on the actuating lever 12 (FIG. 4).
  • the lock 16 mentioned is constructed as follows: In the side board 1 (or 2) there is an opening 27 with a boundary edge 28 which forms a toothing 29. A single tooth as drawn is sufficient here.
  • counter teeth 30 are attached to the locking plate 13.
  • the counter-toothing 30 is provided on a resilient lever part 31 of the locking plate 13, the spring action in the plastic part being brought about by an elongated slot 32.
  • the actuating lever 12 When the smallest writing distance 10 is set, the actuating lever 12 is not moved. Rather, the above-mentioned locking mechanism 16 is moved in the direction 34 by means of a screwdriver 33 (FIG. 4), which is supported by an opening 33a on the actuating lever 12, as a result of which the counter toothing 30 in the locking plate 13 is raised in the direction 35 via the resilient lever part 31 and the lock is released.
  • the locking plate 13 in its guide 18 can be adjusted as desired to the smallest writing distance 10 between the print head 7 and the platen 3, the corresponding functional movement of the print head 7, e.g. can also be a thermal print head is taken into account.
  • Fig. 5 shows the unlocked state as Fig. 4. This setting of the smallest writing distance 10 is therefore carried out completely independently of the setting of the paper thickness with the aid of the adjusting lever 12.

Abstract

In an office machine, particularly a matrix printer, a print head (7) can be positioned against a platen roller (3) by means of a front carriage-guidance shaft (4), which is mounted in the side panels (l, 2). <??>In order to be able to effect a basic adjustment, in addition to that for paper thickness, using simple means and the simplest setting procedure, it is proposed that the front carriage-guidance shaft (4), mounted by means of cams (11) so as to be capable of rotation, is provided with a positioning lever (12), that a catch plate (13) on the side panel (1, 2) is associated with the positioning lever (12) and has a rear and a front limit stop (14, 15) for the positioning lever (12) and that the catch plate (15) can be inserted into a guide after release of a locking arrangement (16), the position of the front limit stop (15) corresponding to the minimum separation distance of the print head (7) from the platen roller (3). <IMAGE>

Description

Die Erfindung betrifft eine Büromaschine, insbesondere einen Marixdrucker, mit einer Einrichtung zur Einstellung des kleinsten Schreibabstandes zwischen einem Druckkopf und einem Schreibwiderlager, die eine vordere und eine hintere Schlittenführungsachse aufweist, auf denen der Schlitten mit dem Druckkopf vor dem Schreibwiderlager geführt ist, wobei die vordere Schlittenführungsachse gegen das Schreibwiderlager in Seitenplatinen anstellbar gelagert ist.The invention relates to an office machine, in particular a Marix printer, with a device for setting the smallest writing distance between a print head and a platen, which has a front and a rear carriage guide axis, on which the carriage with the print head is guided in front of the platen, the front Carriage guide axis is adjustably supported against the writing abutment in side boards.

Derartige "Grundeinstellungen" zwischen einem Druckkopf und einem Schreibwiderlager entsprechen dem funktionswichtigen Abstand der Druckelemente, so daß eine Veränderung dieses Abstandes im Sinn einer Verkleinerung nicht mehr weiter vom Benutzer vorgenommen werden kann. Als Beispiel möge ein Matrixnadeldruckkopf dienen, bei dem der Hubweg der Drucknadeln ca. 0,2 bis 0,5 mm beträgt. Ein kleinerer Abstand als 0,2 mm wäre hier also nicht mehr möglich, und zwar unabhängig von der vom Benutzer gewählten Papierdicke. Nachdem eine solche "Grundeinstellung" im Herstellerwerk vorgenommen worden ist, kann der Benutzer diesen Mindestabstand nicht mehr kleiner einstellen.Such "basic settings" between a printhead and a writing abutment correspond to the functionally important distance of the printing elements, so that the distance can no longer be changed by the user in the sense of a reduction. A matrix needle printhead in which the stroke of the printing needles is approximately 0.2 to 0.5 mm may serve as an example. A distance smaller than 0.2 mm would therefore no longer be possible here, regardless of the paper thickness selected by the user. After such a "basic setting" has been made in the manufacturing plant, the user can no longer set this minimum distance smaller.

Gemäß einem innerbetrieblichen Stand der Technik (Mannesmann-Tally-Drucker Typ MT 140) ist die Schlittenführungsachse in Nutensteinen geführt, die an den Seitenplatinen des Druckergestells vorgesehen sind. Für die Grundeinstellung des Druckkopfes gegen das Schreibwiderlager wird die Schlittenführungsachse zum Schreibwiderlager hin- oder weggeführt. In der Grundeinstellung wird die Schlittenführungsachse mit den Seitenplatinen verschraubt. Diese Ausführungsform verlangt relativ aufwendige und daher teure Teile, deren Montage und deren Justierung schwierig ist.According to an internal state of the art (Mannesmann Tally printer type MT 140), the slide guide axis is guided in sliding blocks which are provided on the side boards of the printer frame. For the basic setting of the print head against the writing abutment, the slide guide axis is guided towards or away from the writing abutment. In the basic setting, the slide guide axis is screwed to the side boards. This embodiment requires relatively complex and therefore expensive parts, the assembly and adjustment of which is difficult.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, bei Gestaltung einfacher Teile deren Anzahl zu vermindern, eine einfache Montage und eine schnelle und sichere Justierung zu erzielen.In contrast, the object of the invention is to reduce the number of simple parts when designing them, to achieve simple assembly and quick and reliable adjustment.

Die gestellte Aufgabe wird bei der eingangs bezeichneten Büromaschine erfindungsgemäß dadurch gelöst, daß die vordere Schlittenführungsachse in den Seitenplatinen jeweils mittels Exzentern drehbar gelagert ist, daß auf der vorderen Schlittenführungsachse außerhalb einer Seitenplatine ein Stellhebel befestigt ist, daß dem Stellhebel eine Rastplatte an der Seitenplatine zugeordnet ist, die einen hinteren und einen vorderen Anschlag für den Stellhebel aufweist und daß die Rastplatte nach Lösen einer Verriegelung zwischen Rastplatte und Seitenplatine um einen spitzen Winkel um die horizontale Achse der vorderen Schlittenführungsache in einer Führung verstellbar ist, wobei die Lage des vorderen Anschlags dem Mindestabstand des Druckkopfes vom Schreibwiderlager entspricht. Neben dem Stellhebel ist nur ein einziger Bauteil, nämlich die Rastplatte, erforderlich, die mehrere Funktionen in sich vereinigt. Die Rastplatte kann als ein kompaktes Teil in der Seitenplatine ohne großen Aufwand befestigt werden, sie kann verstellbar und selbsthemmend gestaltet werden. Die Anschläge können außerdem bereits Bestandteil der Rastplatte sein. Diese Rastplatte ist nunmehr in zweierlei Funktionen einzusetzen: Zum einen wird die erwähnte Grundeinstellung durch Verschiebund der Rastplatte vorgenommen und zum anderen kann durch Verschieben des Stellhebels vom Benutzer trotzdem der Abstand des Druckkopfes zum Schreibwiderlager entsprechend der Anzahl der verwendeten Papierlagen bestimmt werden. Dennoch wird ein Mindestabstand, die sog. Grundeinstellung zum Schreibwiderlager gewährleistet.The stated object is achieved in the office machine described in the introduction in that the front carriage guide axis is rotatably supported in the side boards by means of eccentrics, in that an adjusting lever is fastened on the front carriage guide axis outside a side board, that a locking plate is assigned to the adjusting lever on the side board , Which has a rear and a front stop for the actuating lever and that the locking plate is adjustable in a guide after releasing a lock between the locking plate and side plate by an acute angle about the horizontal axis of the front carriage guide thing, the position of the front stop the minimum distance of the Print head from the abutment corresponds. In addition to the control lever, only a single component, namely the locking plate, is required, which combines several functions. The locking plate can be attached as a compact part in the side board with little effort, it can be made adjustable and self-locking. The stops can also already be part of the locking plate. This locking plate can now be used in two different functions: On the one hand, the basic setting mentioned is carried out by sliding and the locking plate and, on the other hand, the user can still determine the distance of the print head from the platen according to the number of paper layers used by moving the adjusting lever. Nevertheless, a minimum distance, the so-called basic setting to the abutment, is guaranteed.

Nach weiteren Merkmalen ist vorgesehen, daß die Rastplatte in die jeweilige Seitenplatine eingeclipst ist. Eine derartige Befestigungsgestaltung erlaubt dennoch ein Verstellen der Rastplatte in der erwähnten Führung.According to further features, it is provided that the locking plate is clipped into the respective side plate. Such a fastening design nevertheless allows the locking plate to be adjusted in the guide mentioned.

Eine andere Verbesserung der Erfindung sieht vor, daß die Rastplatte eine Radialverzahnung für die Papierdickenverstellung an der Stirnfläche aufweist und daß der Radialverzahnung zumindest ein Rastzahn am Stellhebel gegenüberliegt. Somit übernimmt die Rastplatte hier die Funktion der Papierdickeneinstellung für den Benutzer.Another improvement of the invention provides that the locking plate has a radial toothing for the paper thickness adjustment on the end face and that the radial toothing has at least one locking tooth on the adjusting lever opposite. The locking plate therefore takes over the function of setting the paper thickness for the user.

Nach weiteren Erfindungsgedanken wird vorgeschlagen, daß die Verriegelung zwischen Seitenplatine und Rastplatte aus einer an einem Begrenzungsrand einer bogenförmigen Öffnung in der Seitenplatine vorgesehenen Verzahnung und einer an der Rastplatte vorgesehenen Gegenverzahnung gebildet ist, wobei die Gegenverzahnung an einem federnden Hebelteil der Rastplatte angeordnet ist. Die Verriegelung kann daher mit einfachsten Mitteln gelöst und wieder eingerastet werden.According to further inventive ideas, it is proposed that the locking between the side plate and the locking plate is formed from a toothing provided on a boundary edge of an arcuate opening in the side plate and a counter toothing provided on the locking plate, the counter toothing being arranged on a resilient lever part of the locking plate. The lock can therefore be released and re-engaged with the simplest of means.

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

  • Fig. 1 eine Draufsicht auf ein Druckergestell ohne Gehäuse,
  • Fig. 2 eine Seitenansicht von rechts auf einen Teil des Druckergestells in vergrößertem Maßstab,
  • Fig. 3 eine Seitenansicht von links auf einen Teil des Druckergestells im Maßstab wie Fig. 2,
  • Fig. 4 eine Einzelheit des Einstellvorgangs zur Erreichung der Grundein­stellung, wobei Teile im senkrechten Schnitt dargestellt sind und
  • Fig. 5 eine Seitenansicht von rechts auf eine Seitenplatine mit der Verriegelung.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
  • 1 is a plan view of a printer frame without a housing,
  • 2 is a side view from the right of part of the printer frame on an enlarged scale,
  • 3 is a left side view of part of the printer frame on a scale like FIG. 2,
  • Fig. 4 shows a detail of the adjustment process to achieve the basic setting, parts are shown in vertical section and
  • Fig. 5 is a right side view of a side board with the lock.

Ein Druckergestell besteht aus Seitenplatinen 1 und 2, zwischen denen ein Schreibwiderlager 3 und eine vordere Schlittenführungsachse 4 und eine hintere Schlittenführungsachse 5 befestigt sind. Auf den beiden Schlittenführungsachsen 4 und 5 ist ein Schlitten 6 mit einem Druckkopf 7 parallel über einen Bewegungsweg vor dem Schreibwiderlager 3 geführt. Der Schlitten 6 wird über einen Seil- oder Riemenantrieb 8 mit einem Seil oder Riemen 9 hin- und herbewegt. Der Druckkopf 7 befindet sich hierbei mit den Druckelementen in einem Grundabstand 10 zu der Oberfläche des Aufzeichnungsträgers, der gerade auf dem Schreibwiderlager 3 aufliegt.A printer frame consists of side boards 1 and 2, between which a writing abutment 3 and a front carriage guide axis 4 and a rear carriage guide axis 5 are fastened. On the two slide guide axes 4 and 5 there is a slide 6 with a print head 7 led in parallel over a movement path in front of the abutment 3. The carriage 6 is moved back and forth by means of a cable or belt drive 8 with a cable or belt 9. The printhead 7 is located with the printing elements at a basic distance 10 from the surface of the recording medium which is currently resting on the abutment 3.

Die vordere Schlittenführungsachse 4 ist in den Seitenplatinen 1, 2 jeweils mittels Exzentern 11 (Fig. 2) befestigt. Auf den Exzentern 11 ist ein Stellhebel 12 drehfest angebracht. In dem Stellhebel 12 ist eine Rastplatte 13 an der Wandfläche der Seitenplatine 1 befestigt. Die Rastplatte 13 kann aus einem einstückigen Kunststoffteil aus plastifizierbarem Kunststoff gespritzt sein. Dabei sind ein hinterer Anschlag 14 und ein vorderer Anschlag 15 an der Rastplatte 13 angeformt. Zwischen der Rastplatte 13 und der Seitenplatine 1 (bzw. 2) ist eine nachstehend noch genauer beschriebene Verriegelung 16 vorgesehen, wobei die Wirkung auf einen spitzen Winkel 17 ausgedehnt ist. Die Rastplatte 13 ist um die horizontale Achse 11a der Schlittenführungsachse 4 in einer Führung 18 schwenkbar. Die Führung 18 wird hier jeweils durch Stifte 19, die an der Rastplatte 13 ebenfalls angeformt sind und Langlöchern 20 in der Seitenplatine 1 (bzw. 2) gebildet.The front slide guide axis 4 is fastened in the side boards 1, 2 in each case by means of eccentrics 11 (FIG. 2). On the eccentrics 11, an adjusting lever 12 is rotatably attached. In the control lever 12, a locking plate 13 is attached to the wall surface of the side board 1. The locking plate 13 can be injection molded from a one-piece plastic part made of plastic that can be plasticized. A rear stop 14 and a front stop 15 are integrally formed on the locking plate 13. Between the locking plate 13 and the side plate 1 (or 2), a lock 16 described in more detail below is provided, the effect being extended to an acute angle 17. The locking plate 13 is pivotable about the horizontal axis 11a of the slide guide axis 4 in a guide 18. The guide 18 is formed here in each case by pins 19, which are also integrally formed on the locking plate 13 and elongated holes 20 in the side plate 1 (or 2).

Die Rastplatte 13 wird in die jeweilige Seitenplatine 1 bzw. 2 eingeclipst, wobei die Stifte 19 zu radial federnden Druckstiften 21 (Fig. 5) weitergebildet sind.The locking plate 13 is clipped into the respective side plate 1 or 2, the pins 19 being further developed into radially resilient pressure pins 21 (FIG. 5).

Die Rastplatte 13 weist ferner eine Radialverzahnung 22 für die Papierdickeneinstellung auf, wobei hier der Stellhebel 12 in die Richtungen 23 und 24 bewegt wird, falls der Benutzer den Abstand des Druckkopfes 7 zur Papieroberfläche auf dem Schreibwiderlager 3 neu einstellen will. Wegen des größeren Verstellweges für unterschiedliche Papierdicken ist diese Radialverzahnung 22 entsprechend ausgedehnter (Fig. 3) bemessen. Die Radialverzahnung 22 befindet sich an der Stirnfläche 25 der Rastplatte 13; gegenüberliegend befindet sich am Stellhebel 12 zumindest ein Rastzahn 26 (Fig. 4).The locking plate 13 also has a radial toothing 22 for the paper thickness adjustment, here the setting lever 12 is moved in the directions 23 and 24 if the user wants to readjust the distance of the print head 7 to the paper surface on the abutment 3. Because of the larger adjustment path for different paper thicknesses, this radial toothing 22 is dimensioned correspondingly larger (FIG. 3). The radial toothing 22 is located on the end face 25 of the locking plate 13; Opposite there is at least one locking tooth 26 on the actuating lever 12 (FIG. 4).

Die erwähnte Verriegelung 16 ist wie folgt aufgebaut: In der Seitenplatine 1 (bzw. 2) befindet sich eine Öffnung 27 mit einem Begrenzungsrand 28, der eine Verzahnung 29 bildet. Hier genügt ein einzelner Zahn wie gezeichnet. Hierzu ist an der Rastplatte 13 eine Gegenverzahnung 30 angebracht. Die Gegenverzahnung 30 ist an einem federnden Hebelteil 31 der Rastplatte 13 vorgesehen, wobei die Federwirkung in dem Kunststoffteil durch einen langgezogenen Schlitz 32 hervorgerufen wird.The lock 16 mentioned is constructed as follows: In the side board 1 (or 2) there is an opening 27 with a boundary edge 28 which forms a toothing 29. A single tooth as drawn is sufficient here. For this purpose, counter teeth 30 are attached to the locking plate 13. The counter-toothing 30 is provided on a resilient lever part 31 of the locking plate 13, the spring action in the plastic part being brought about by an elongated slot 32.

Bei Einstellung des kleinsten Schreibabstandes 10 wird der Stellhebel 12 nicht bewegt. Vielmehr wird die erwähnte Verriegelung 16 mittels eines Schraubendrehers 33 (Fig. 4), der durch eine Öffnung 33a am Stellhebel 12 abgestützt wird, in Richtung 34 bewegt, wodurch die Gegenverzahnung 30 in der Rastplatte 13 über den federnden Hebelteil 31 in Richtung 35 angehoben wird und die Verriegelung gelöst wird. Nunmehr kann die Rastplatte 13 in ihrer Führung 18 wie gewünscht auf den kleinsten Schreibabstand 10 zwischen dem Druckkopf 7 und dem Schreibwiderlager 3 eingestellt werden, wobei die entsprechende Funktionsbewegung des Druckkopfes 7, der z.B. auch ein Thermodruckkopf sein kann, berücksichtigt wird. Durch Nachlassen des Schraubendrehers 33 entgegen der Richtung 34 erfolgt wiederum das Einrasten der Gegenverzahnung 30 an der Rastplatte 13 in die Verzahnung 29, wie in Fig. 5 erkennbar. Es ist hier allerdings zu beachten, daß Fig. 5 den entriegelten Zustand wie Fig. 4 zeigt. Diese Einstellung des kleinsten Schreibabstandes 10 erfolgt demzufolge völlig unabhängig von der Einstellung der Papierdicke mit Hilfe des Stellhebels 12.When the smallest writing distance 10 is set, the actuating lever 12 is not moved. Rather, the above-mentioned locking mechanism 16 is moved in the direction 34 by means of a screwdriver 33 (FIG. 4), which is supported by an opening 33a on the actuating lever 12, as a result of which the counter toothing 30 in the locking plate 13 is raised in the direction 35 via the resilient lever part 31 and the lock is released. Now the locking plate 13 in its guide 18 can be adjusted as desired to the smallest writing distance 10 between the print head 7 and the platen 3, the corresponding functional movement of the print head 7, e.g. can also be a thermal print head is taken into account. By loosening the screwdriver 33 in the opposite direction 34, the counter-toothing 30 on the locking plate 13 engages in the toothing 29, as can be seen in FIG. 5. It should be noted here, however, that Fig. 5 shows the unlocked state as Fig. 4. This setting of the smallest writing distance 10 is therefore carried out completely independently of the setting of the paper thickness with the aid of the adjusting lever 12.

Claims (4)

1. Büromaschine, insbesondere Matrixdrucker, mit einer Einrichtung zur Einstellung des kleinsten Schreibabstandes (10) zwischen einem Druckkopf (7) und einem Schreibwiderlager (3), die eine vordere und eine hintere Schlittenführungsachse (4,5) aufweist, auf denen der Schlitten (6) mit dem Druckkopf (7) vor dem Schreibwiderlager (3) geführt ist, wobei die vordere Schlittenführungsachse (4) gegen das Schreibwiderlager (3) in Seitenplatinen (1,2) anstellbar gelagert ist, dadurch gekennzeichnet,
daß die vordere Schlittenführungsachse (4) in den Seitenplatinen (1,2) jeweils mittels Exzentern (11) drehbar gelagert ist, daß auf der vorderen Schlittenführungsachse (4) außerhalb einer Seitenplatine (1;2) ein Stellhebel (12) befestigt ist, daß dem Stellhebel (12) eine Rastplatte (13) an der Seitenplatine (1;2) zugeordnet ist, die einen hinteren und einen vorderen Anschlag (14;15) für den Stellhebel (12) aufweist und daß die Rastplatte (13) nach Lösen einer Verriegelung (16) zwischen Rastplatte (13) und Seitenplatine (1;2) um einen spitzen Winkel (17) um die horizontale Achse (11a) der vorderen Schlittenführungsachse (4) in einer Führung (18) verstellbar ist, wobei die Lage des vorderen Anschlags (15) dem Mindestabstand des Druckkopfes (7) vom Schreibwiderlager (3) entspricht.1. Office machine, in particular a matrix printer, with a device for setting the smallest writing distance (10) between a print head (7) and a writing abutment (3), which has a front and a rear carriage guide axis (4,5) on which the carriage ( 6) is guided with the print head (7) in front of the writing abutment (3), the front carriage guide axis (4) being adjustably supported against the writing abutment (3) in side plates (1, 2), characterized in that
that the front carriage guide axis (4) is rotatably mounted in the side boards (1, 2) by means of eccentrics (11), that on the front carriage guide axis (4) outside of a side board (1; 2) an adjusting lever (12) is attached that the locking lever (12) is assigned a locking plate (13) on the side plate (1; 2), which has a rear and a front stop (14; 15) for the locking lever (12) and that the locking plate (13) after loosening one Locking (16) between locking plate (13) and side plate (1; 2) by an acute angle (17) about the horizontal axis (11a) of the front carriage guide axis (4) in a guide (18) is adjustable, the position of the front Stop (15) corresponds to the minimum distance of the print head (7) from the abutment (3). 2. Büromaschine nach Anspruch 1,
dadurch gekennzeichnet,
daß die Rastplatte (13) in die jeweilige Seitenplatine (1;2) eingeclipst ist.2. office machine according to claim 1,
characterized,
that the locking plate (13) is clipped into the respective side plate (1; 2). 3. Büromaschine nach den Ansprüchen 1 oder 2,
dadurch gekennzeichnet,
daß die Rastplatte (13) eine Radialverzahnung (22) für die Papierdickenverstellung an der Stirnfläche (25) aufweist und daß der Radialverzahnung (22) zumindest ein Rastzahn (26) am Stellhebel (12) gegenüberliegt.3. office machine according to claims 1 or 2,
characterized,
that the locking plate (13) has a radial toothing (22) for the paper thickness adjustment on the end face (25) and that the radial toothing (22) is opposite to at least one locking tooth (26) on the adjusting lever (12). 4. Büromaschine nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Verriegelung (16) zwischen Seitenplatine (1;2) und Rastplatte (13) aus einer an einem Begrenzungsrand (28) einer bogenförmigen Öffnung (27) in der Seitenplatine (1;2) vorgesehenen Verzahnung (29) und einer an der Rastplatte (13) vorgesehenen Gegenverzahnung (30) gebildet ist, wobei die Gegenverzahnung (30) an einem federnden Hebelteil (31) der Rastplatte (13) angeordnet ist.4. office machine according to one or more of claims 1 to 3,
characterized,
that the lock (16) between the side plate (1; 2) and the locking plate (13) from a toothing (29) provided on a boundary edge (28) of an arcuate opening (27) in the side plate (1; 2) and one on the locking plate (13) provided counter-toothing (30) is formed, the counter-toothing (30) being arranged on a resilient lever part (31) of the locking plate (13).
EP87730110A 1987-09-23 1987-09-23 Office machine, in particular matrix printer, with print head/platen-gap adjustment Expired - Lifetime EP0308566B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP87730110A EP0308566B1 (en) 1987-09-23 1987-09-23 Office machine, in particular matrix printer, with print head/platen-gap adjustment
AT87730110T ATE83439T1 (en) 1987-09-23 1987-09-23 OFFICE MACHINE, PARTICULARLY MATRIX PRINTER, WITH PRINT HEAD/PRINT REST DISTANCE ADJUSTMENT.
DE8787730110T DE3783135D1 (en) 1987-09-23 1987-09-23 OFFICE MACHINE, ESPECIALLY MATRIX PRINTER, WITH PRINT HEAD / WRITING RESPONSE ADJUSTMENT.
US07/248,488 US4906115A (en) 1987-09-23 1988-09-23 Apparatus for adjusting the minimum print heat to platen spacing in a printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87730110A EP0308566B1 (en) 1987-09-23 1987-09-23 Office machine, in particular matrix printer, with print head/platen-gap adjustment

Publications (2)

Publication Number Publication Date
EP0308566A1 true EP0308566A1 (en) 1989-03-29
EP0308566B1 EP0308566B1 (en) 1992-12-16

Family

ID=8198363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730110A Expired - Lifetime EP0308566B1 (en) 1987-09-23 1987-09-23 Office machine, in particular matrix printer, with print head/platen-gap adjustment

Country Status (4)

Country Link
US (1) US4906115A (en)
EP (1) EP0308566B1 (en)
AT (1) ATE83439T1 (en)
DE (1) DE3783135D1 (en)

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DE3909254A1 (en) * 1989-03-21 1990-09-27 Esselte Meto Int Gmbh THERMAL PRINT HEAD
EP1721752A3 (en) * 2005-05-12 2008-01-23 Toshiba Tec Kabushiki Kaisha Thermal printer

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US6027264A (en) * 1998-02-16 2000-02-22 Hewlett-Packard Company Fixtureless, accurate system and assembly method for controlling pen-to-paper spacing in an inkjet printer
US6450710B1 (en) 2000-07-14 2002-09-17 Lexmark International, Inc. Frame system for an ink jet printer
US6637958B2 (en) * 2000-10-30 2003-10-28 Vutek, Inc. Printing system with adjustable carriage rail support
DE10259569A1 (en) * 2002-12-19 2004-07-01 Hilti Ag Hand-held power tool, e.g. chisel hammer, has sensor switch connected free of vibration with switch carrier
JP4508937B2 (en) * 2005-05-12 2010-07-21 キヤノン株式会社 Recording device
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Also Published As

Publication number Publication date
EP0308566B1 (en) 1992-12-16
US4906115A (en) 1990-03-06
ATE83439T1 (en) 1993-01-15
DE3783135D1 (en) 1993-01-28

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