EP0139190A1 - Method of manufacturing a needle guide for a needle-printing head, and needle guide made by this method - Google Patents

Method of manufacturing a needle guide for a needle-printing head, and needle guide made by this method Download PDF

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Publication number
EP0139190A1
EP0139190A1 EP84110512A EP84110512A EP0139190A1 EP 0139190 A1 EP0139190 A1 EP 0139190A1 EP 84110512 A EP84110512 A EP 84110512A EP 84110512 A EP84110512 A EP 84110512A EP 0139190 A1 EP0139190 A1 EP 0139190A1
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EP
European Patent Office
Prior art keywords
needle
guide
plate
guide plates
print head
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
EP84110512A
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German (de)
French (fr)
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EP0139190B1 (en
Inventor
Hermann Kohlhage
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Wincor Nixdorf International GmbH
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Wincor Nixdorf International GmbH
Nixdorf Computer AG
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Publication of EP0139190A1 publication Critical patent/EP0139190A1/en
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Publication of EP0139190B1 publication Critical patent/EP0139190B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • 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
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B41J25/005—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for serial printing movements superimposed to character- or line-spacing movements

Definitions

  • the invention relates to a method for producing the needle guide of a needle print head according to the preamble of claim 1 and to a needle guide manufactured according to this method according to the preamble of claim 4.
  • needle print heads are provided with a single vertical row of needles; the expression “vertical” here refers to a direction lying at right angles to the line direction in the writing plane.
  • the needle print head moves column by column, with certain needles being actuated in each column.
  • each character to be printed is composed of the print patterns of several columns.
  • the needle guide has a separate guide plate for each group of needles; This arrangement made it - light to enable one of the two rows of needles relative to the other by a half needle pitch vertically, so that the writing spots of a row of needles may be respectively set between the write points of the other row of needles with a corresponding switching operation of the print head in the row direction, in order in this Way to improve the quality of the printed characters.
  • the guide plates must not be mutually offset perpendicular to their plane.
  • the two guide plates are manufactured separately and mounted on the print head. One guide plate is connected directly to the printhead, while the other is mounted on the printhead via a movable holder. This results in a considerable assembly and adjustment effort to ensure the mutual exact position of the two guide plates to each other.
  • a complete plate comprising all guide plates is first provided with the hole patterns of the guide plates in their exact mutual normal arrangement. Then the entire perforated plate is connected to the needle printhead, the exact. Alignment of the individual guide plates to each other is not lost. Only then is the entire plate divided to form the individual guide plates.
  • each of the movable holders for mounting the entire plate is aligned and fixed in an assembly position, which ensures the exact alignment of the individual guide plates to each other after the division of the entire plate.
  • the entire plate is pre-perforated along its dividing lines before it is connected to the dot-matrix print head, so that, for example, only individual thin connecting webs have to be severed.
  • Normal arrangement is understood to mean the arrangement of the guide plates with respect to one another which they assume in normal writing operation, that is to say when there is no offset in the case of guide plates which are arranged to be movable relative to one another.
  • one of the guide plates is supported in a vertically movable manner by means of a parallelogram handlebar formed from resilient arms.
  • the resilient arms are arranged in a plane lying essentially parallel to the writing plane. Since the ends of these arms in the vertical adjustment of the guide plate on circular arcs about the clamped ends of these Arme_belie, each vertical movement of the guide plate also has a distance change of this guide plate of the fixed guide plate for a row. Since the step size of the print head in the row direction corresponds, for example, exactly to the distance between the two rows of needles in the normal arrangement of the guide plates, the writing points become the two needle groups are not exactly in line with a staggered arrangement, so that the typeface becomes dirty.
  • the accuracy achieved by the inventive method in the mutual arrangement of the guide plates also with a mutual offset provides that the arms of the holding g portable respectively in are arranged approximately perpendicular to the plane of the guide plate.
  • the movable guide plate only executes the desired offset movement in its plane, so that, for example, in the case of guide plates which can be displaced vertically with respect to one another, the lateral spacing thereof and thus the pressure needle guided through it are exactly maintained.
  • two guide plates which are arranged next to one another in the printing line direction and are each fastened to a holding fork, are provided, which can be adjusted in the opposite direction to one another in the printing column direction. This ensures that the inevitable misalignment perpendicular to the guide plate plane is kept small when using holding forks perpendicular to the guide plate plane, and that it occurs simultaneously in both guide plates and in the same direction, so that both guide plates are always in the same plane.
  • the two holding forks are formed by a single resilient, fork-shaped bracket with bracket legs slotted in the longitudinal direction. This will next to achieved a simple structure that the two holding forks are exactly aligned with each other and have the same elastic movement properties, which is essential for the alignment of the printing needles and thus ultimately for the quality of the typeface.
  • the guide plates are preferably connected to the arms by welding.
  • any other suitable connection method for example gluing, can also be considered.
  • Different, respectively suitable materials can be selected for the guide plates on the one hand and the holding forks on the other hand, the guide plates preferably being made of a hard, abrasion-resistant material, the holding forks made of a material with the desired elastic properties.
  • the needle printhead 2 shown in FIG. 1 comprises a printhead housing 4, in which the drives for the printing needles, which are not shown here, are accommodated, and a needle guide 6 for guiding the needles 8.
  • the needle guide 6 in turn consists of two holding forks 10, 12, which each hold a guide plate 14, 16.
  • the guide plates 14, 16 are provided with rows of holes 18, 20 which allow the needles 8 to pass through.
  • An actuating drive 22 acts on the guide plate 14 and moves it upwards in the direction of the arrow 24.
  • An actuator 26 engages on the guide plate 16, by means of which this guide plate can be moved downward in the direction of the arrow 28.
  • the total mutual vertical displacement corresponds to half the vertical distance between two holes.
  • the two holding forks 10, 12 are formed from a single fork-shaped bracket 30, the two bracket legs of which are slotted in the longitudinal direction.
  • the guide plates 14, 16 are connected to the arms of the holding forks 10, 12 by welding.
  • Fig. 2 shows an overall plate 32 formed from two adjacent, contiguous guide plates 14 ', 16'. It is provided with two rows of holes 18 ', 20', the mutual arrangement of which is exactly the arrangement shown in Fig. 1, that is, without a vertical offset Guide plates.
  • the entire plate 32 is connected as a whole to the holding forks 10, 12.
  • the entire plate is then divided along the dividing lines denoted by 34, the exact alignment of the two guide plates 14 ', 16' not lost to each other.
  • Fig. 3 shows an auxiliary device 40, in which the bracket 30 is inserted for mounting the entire plate 32.
  • the auxiliary device ensures an exact alignment of the holding forks 10, 12 and their fixing during the assembly of the entire plate 32.
  • Fig. 4 shows schematically a needle print head 2 corresponding to Fig. 1. It can be seen that with a deflection e.g. the guide plate 14 is connected at the same time an offset to the rear by the amount s, since the arms of the holding fork 10 move on an arc 36 around the clamped end 38. Since the holding fork is constructed approximately in the manner of a parallelogram handlebar, the guide plate 14 remains parallel to itself. Since a simultaneous downward movement of the guide plate 16 takes place by the same amount with the upward movement of the guide plate 14, the same offset s results to the rear for both guide plates, so that their mutual alignment perpendicular to their planes is maintained.
  • a deflection e.g. the guide plate 14 is connected at the same time an offset to the rear by the amount s, since the arms of the holding fork 10 move on an arc 36 around the clamped end 38. Since the holding fork is constructed approximately in the manner of a parallelogram handlebar, the guide plate 14 remains parallel to itself. Since a simultaneous downward movement

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Abstract

1. A process for manufacturing the needle guide of a needle printer head, where several needle groups are guided respectively through a separate perforated guide plate mounted on said needle printer head, characterized in that - a pattern of holes identical with that of the guide plates (14, 16) is punched into an entire plate (32) comprising said guide plates (14, 16), - that the perforated entire plate (32) is connected with said needle printer head (2), and - that subsequently said entire plate (32) is divided to form the individual guide plates (14, 16).

Description

Die Erfindung betrifft ein Verfahren zur Herstellung der Nadelführung eines Nadeldruckkopfes gemäß dem Oberbegriff des Anspruches 1 sowie eine nach diesem Verfahren hergestellte Nadelführung gemäß dem Oberbegriff des Anspruches 4.The invention relates to a method for producing the needle guide of a needle print head according to the preamble of claim 1 and to a needle guide manufactured according to this method according to the preamble of claim 4.

In ihrer einfachsten Ausgestaltung sind Nadeldruckköpfe mit einer einzigen vertikalen Nadelreihe versehen; der Ausdruck "vertikal" bezieht sich hierbei auf eine rechtwinklig zur Zeilenrichtung in der Schreibebene liegende Richtung. Der Nadeldruckkopf bewegt sich in Zeilenrichtung spaltenweise weiter, wobei in jeder Spalte bestimmte Nadeln betätigt werden. Jedes zu druckende Zeichen setzt sich aus den Druckmustern mehrerer Spalten zusammen, wie allgemein bekannt ist. Um die Schreibgeschwindigkeit zu erhöhen, ist es auch schon bekannt, mehrere Nadelgruppen zu verwenden. So können beispielsweise bei der Verwendung von zwei in Zeilenrichtung nebeneinander angeordneten Nadelreihen in einer ersten Druckkopfstellung die erste und dritte Schreibspalte, in einer zweiten Druckkopfstellung die zweite und vierte Schreibspalte gleichzeitig geschrieben werden usw. (DE-OS 26 32 293). Die Nadelführung weist dabei für jede Nadelgruppe eine gesonderte Führungsplatte auf; diese Anordnung ermög- licht es, eine der beiden Nadelreihen gegenüber der anderen um einen halben Nadelabstand vertikal zu versetzen, so daß bei entsprechender Fortschaltung des Druckkopfes in Zeilenrichtung die Schreibpunkte der einen Nadelreihe jeweils zwischen die Schreibpunkte der anderen Nadelreihe gesetzt werden können, um auf diese Weise die Qualität der Druckzeichen zu verbessern.In their simplest configuration, needle print heads are provided with a single vertical row of needles; the expression "vertical" here refers to a direction lying at right angles to the line direction in the writing plane. The needle print head moves column by column, with certain needles being actuated in each column. As is generally known, each character to be printed is composed of the print patterns of several columns. In order to increase the writing speed, it is also known to use several groups of needles. For example, when using two rows of needles arranged side by side in the row direction, the first and third write columns can be written simultaneously in a first print head position, the second and fourth write column in a second print head position, etc. (DE-OS 26 32 293). The needle guide has a separate guide plate for each group of needles; This arrangement made it - light to enable one of the two rows of needles relative to the other by a half needle pitch vertically, so that the writing spots of a row of needles may be respectively set between the write points of the other row of needles with a corresponding switching operation of the print head in the row direction, in order in this Way to improve the quality of the printed characters.

An die Genauigkeit der Nadelführungen werden sehr hohe Anforderungen gestellt. Die gegenseitige Lage der Nadelgruppen in der Schreibebene muß sehr genau eingehalten werden, damit ein sauberes Schriftbild garantiert ist. Auch dürfen die Führungsplatten senkrecht zu ihrer Ebene nicht gegeneinander versetzt sein. Bei der bekannten Konstruktion werden die beiden Führungsplatten getrennt hergestellt und am Druckkopf montiert. Dabei wird eine Führungsplatte direkt mit dem Druckkopf verbunden, während die andere über eine bewegliche Halterung auf dem Druckkopf gelagert ist. Dabei ergibt sich ein erheblicher Montage- und Justieraufwand, um die gegenseitige genaue Lage der beiden Führungsplatten zueinander sicherzustellen.Very high demands are placed on the accuracy of the needle guides. The mutual position of the needle groups in the writing plane must be observed very precisely so that a clean typeface is guaranteed. Also, the guide plates must not be mutually offset perpendicular to their plane. In the known construction, the two guide plates are manufactured separately and mounted on the print head. One guide plate is connected directly to the printhead, while the other is mounted on the printhead via a movable holder. This results in a considerable assembly and adjustment effort to ensure the mutual exact position of the two guide plates to each other.

Es ist eine Aufgabe der Erfindung, ein Verfahren zur Herstellung der Nadelführung eines Nadeldruckkopfes gemäß dem Oberbegriff des Anspruches 1 zu schaffen, bei welchem mit geringem Montage- und Justieraufwand eine größtmögliche Genauigkeit in der gegenseitigen Anordnung der Führungsplatten zueinander erzielt werden kann.It is an object of the invention to provide a method for producing the needle guide of a needle print head according to the preamble of claim 1, in which the greatest possible accuracy in the mutual arrangement of the guide plates can be achieved with little assembly and adjustment effort.

Diese Aufgabe ist erfindungsgemäß durch die im kennzeichnenden Teil des Anspruches 1 aufgeführten Merkmale gelöst. Eine alle Führungsplatten umfassende Gesamtplatte wird zunächst mit den Lochmustern der Führungsplatten in ihrer exakten gegenseitigen Normal-Anordnung versehen. Sodann wird die gelochte Gesamtplatte mit dem Nadeldruckkopf verbunden, wobei die genaue. Ausrichtung der einzelnen Führungsplatten zueinander nicht verloren geht. Erst dann wird die Gesamtplatte zur Bildung der einzelnen Führungsplatten geteilt.This object is achieved by the features listed in the characterizing part of claim 1. A complete plate comprising all guide plates is first provided with the hole patterns of the guide plates in their exact mutual normal arrangement. Then the entire perforated plate is connected to the needle printhead, the exact. Alignment of the individual guide plates to each other is not lost. Only then is the entire plate divided to form the individual guide plates.

Wenn wenigstens eine oder auch mehrere der Führungsplatten nicht direkt, sondern über eine bewegliche Halterung am Nadeldruckkopf gelagert sind, ist vorgesehen, daß jede der beweglichen Halterungen zur Montage der Gesamtplatte in eine Montagestellung ausgerichtet und fixiert wird, welche nach der Teilung der Gesamtplatte die exakte Ausrichtung der einzelnen Führungsplatten zueinander gewährleistet.If at least one or more of the leaders plates are not directly, but are mounted on a movable holder on the needle printhead, it is provided that each of the movable holders for mounting the entire plate is aligned and fixed in an assembly position, which ensures the exact alignment of the individual guide plates to each other after the division of the entire plate.

Um den Bearbeitungsaufwand nach der Montage der Gesamtplatte möglichst gering zu halten, ist in einer Ausgestaltung des erfindungsgemäßen Verfahrens vorgesehen, daß die Gesamtplatte vor ihrer Verbindung mit dem Nadeldruckkopf längs ihrer Teilungslinien vorperforiert wird, so daß beispielsweise nur noch einzelne dünne Verbindungsstege zu durchtrennen sind.In order to keep the processing effort after assembling the entire plate as low as possible, in one embodiment of the method according to the invention it is provided that the entire plate is pre-perforated along its dividing lines before it is connected to the dot-matrix print head, so that, for example, only individual thin connecting webs have to be severed.

Unter "Normal-Anordnung" wird die Anordnung der Führungsplatten zueinander verstanden, welche sie im normalen Schreibbetrieb einnehmen, das heißt, wenn bei gegeneinander beweglich angeordneten Führungsplatten kein Versatz besteht. “Normal arrangement” is understood to mean the arrangement of the guide plates with respect to one another which they assume in normal writing operation, that is to say when there is no offset in the case of guide plates which are arranged to be movable relative to one another.

Bei der bekannten Konstruktion ist eine der Führungsplatten über einen aus federnden Armen gebildeten Parallelogrammlenker vertikal beweglich gelagert. Die federnden Arme sind in einer im wesentlichen parallel zur Schreibebene liegenden Ebene angeordnet. Da sich die Enden dieser Arme bei der Vertikalverstellung der Führungsplatte etwa auf Kreisbögen um die eingespannten Enden dieser Arme_bewegen, hat jede Vertikalbewegung der Führungsplatte auch eine Abstandsänderung dieser Führungsplatte von der feststehenden Führungs- platte zur Folge. Da die Schrittweite des Druckkopfes in Zeilenrichtung beispielsweise exakt dem Abstand der beiden Nadelreihen in Normal-Anordnung der Führungsplatten entspricht, werden die Schreibpunkte der beiden Nadelgruppen bei versetzter Anordnung nicht exakt in einer Linie liegen, so daß das Schriftbild unsauber wird.In the known construction, one of the guide plates is supported in a vertically movable manner by means of a parallelogram handlebar formed from resilient arms. The resilient arms are arranged in a plane lying essentially parallel to the writing plane. Since the ends of these arms in the vertical adjustment of the guide plate on circular arcs about the clamped ends of these Arme_bewegen, each vertical movement of the guide plate also has a distance change of this guide plate of the fixed guide plate for a row. Since the step size of the print head in the row direction corresponds, for example, exactly to the distance between the two rows of needles in the normal arrangement of the guide plates, the writing points become the two needle groups are not exactly in line with a staggered arrangement, so that the typeface becomes dirty.

Um bei einer Nadelführung.gemäß dem Oberbegriff des Anspruches 4 die durch das erfindungsgemäße Verfahren erreichte Genauigkeit in der gegenseitigen Anordnung der Führungsplatten auch bei einem gegenseitigen Versatz nicht zu verlieren, ist nach einem Merkmal der Erfindung vorgesehen, daß die Arme der Haltegabel jeweils in einer etwa senkrecht zur Führungsplattenebene liegenden Ebene angeordnet sind. Dadurch führt die bewegliche Führungsplatte in ihrer Ebene nur die erwünschte Versatzbewegung aus,-so daß beispielsweise bei gegeneinander vertikal versetzbaren Führungsplatten der seitliche Abstand derselben und damit der durch diese geführten Drucknadel exakt erhalten bleibt.In order not to lose at a Nadelführung.gemäß the preamble of claim 4, the accuracy achieved by the inventive method in the mutual arrangement of the guide plates also with a mutual offset, according to an aspect of the invention provides that the arms of the holding g portable respectively in are arranged approximately perpendicular to the plane of the guide plate. As a result, the movable guide plate only executes the desired offset movement in its plane, so that, for example, in the case of guide plates which can be displaced vertically with respect to one another, the lateral spacing thereof and thus the pressure needle guided through it are exactly maintained.

In einer bevorzugten Ausführungsform der Erfindung sind zwei in Druckzeilenrichtung nebeneinander angeordnete, jeweils an einer Haltegabel befestigte Führungsplatten vorgesehen, welche in Druckspaltenrichtung entgegengesetzt zueinander verstellbar sind. Dadurch wird erreicht, daß der bei Verwendung von senkrecht zur Führungsplattenebene stehenden Haltegabeln unvermeidliche Versatz senkrecht zur Führungsplattenebene gering gehalten wird, und daß er bei beiden Führungsplatten gleichzeitig und in gleicher Richtung auftritt, so daß sich beide Führungsplatten immer in der gleichen Ebene befinden.In a preferred embodiment of the invention, two guide plates, which are arranged next to one another in the printing line direction and are each fastened to a holding fork, are provided, which can be adjusted in the opposite direction to one another in the printing column direction. This ensures that the inevitable misalignment perpendicular to the guide plate plane is kept small when using holding forks perpendicular to the guide plate plane, and that it occurs simultaneously in both guide plates and in the same direction, so that both guide plates are always in the same plane.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die beiden Haltegabeln durch einen einzigen federnden, gabelförmigen Bügel mit in Längsrichtung geschlitzten Bügelschenkeln gebildet sind. Dadurch wird neben einem einfachen Aufbau erreicht, daß die beiden Haltegabeln exakt zueinander ausgerichtet sind und die gleichen elastischen Bewegungseigenschaften haben, was für die Ausrichtung der Drucknadeln und damit letztlich für die Qualität des. Schriftbildes von wesentlicher Bedeutung ist.In a further embodiment of the invention it is provided that the two holding forks are formed by a single resilient, fork-shaped bracket with bracket legs slotted in the longitudinal direction. This will next to achieved a simple structure that the two holding forks are exactly aligned with each other and have the same elastic movement properties, which is essential for the alignment of the printing needles and thus ultimately for the quality of the typeface.

Die Führungsplatten sind vorzugsweise mit den Armen durch Schweißen verbunden. Es kommen jedoch auch beliebige andere, geeignete Verbindungsverfahren, beispielsweise Kleben, in Betracht. Für die Führungsplatten einerseits und die Haltegabeln andererseits können unterschiedliche, jeweils geeignete Materialien gewählt werden, wobei die Führungsplatten vorzugsweise aus einem harten, abriebfesten Material, die Haltegabeln aus einem Material mit den gewünschten elastischen Eigenschaften hergestellt werden.The guide plates are preferably connected to the arms by welding. However, any other suitable connection method, for example gluing, can also be considered. Different, respectively suitable materials can be selected for the guide plates on the one hand and the holding forks on the other hand, the guide plates preferably being made of a hard, abrasion-resistant material, the holding forks made of a material with the desired elastic properties.

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

  • Figur 1 in einer Teilansicht einen Nadeldruckkopf mit zwei nebeneinander angeordneten Führungsplatten;
  • Figur 2 zwei zu einer Doppelplatte zusammengefaßte Führungsplatten vor ihrer Montage;
  • Figur 3 einen Bügel in einer Hilfsvorrichtung zum Ausrichten und Fixieren des Bügels;
  • Figur 4 eine schematische Seitenansicht eines Druckkopfes gemäß Figur 1.
An embodiment of the invention is shown in the drawing and described in more detail below. Show it:
  • Figure 1 is a partial view of a wire print head with two guide plates arranged side by side;
  • Figure 2 two guide plates combined into a double plate before their assembly;
  • Figure 3 shows a bracket in an auxiliary device for aligning and fixing the bracket;
  • FIG. 4 shows a schematic side view of a print head according to FIG. 1.

Der in Fig. 1 dargestellte Nadeldruckkopf 2 umfaßt ein Druckkopfgehäuse 4, in welchem die hier nicht näher dargestellten Antriebe für die Drucknadeln unterge-, bracht sind, sowie eine Nadelführung 6 zur Führung der Nadeln 8. Die Nadelführung 6 besteht ihrerseits aus zwei Haltegabeln 10, 12, welche jeweils eine Führungsplatte 14, 16 halten. Die Führungsplatten 14, 16 sind mit Lochreihen 18, 20 versehen, welche den Durchtritt der Nadeln 8 erlauben. An der Führungsplatte 14 greift ein Stellantrieb 22 an, welcher diese in Richtung des Pfeiles 24 nach oben verschiebt. An der Führungsplatte 16 greift ein Stellantrieb 26 an, durch den diese Führungsplatte in Richtung des Pfeiles 28 nach unten verschoben werden kann. Die gesamte gegenseitige vertikale Verschiebung entspricht der Hälfte des vertikalen Abstandes zweier Löcher.The needle printhead 2 shown in FIG. 1 comprises a printhead housing 4, in which the drives for the printing needles, which are not shown here, are accommodated, and a needle guide 6 for guiding the needles 8. The needle guide 6 in turn consists of two holding forks 10, 12, which each hold a guide plate 14, 16. The guide plates 14, 16 are provided with rows of holes 18, 20 which allow the needles 8 to pass through. An actuating drive 22 acts on the guide plate 14 and moves it upwards in the direction of the arrow 24. An actuator 26 engages on the guide plate 16, by means of which this guide plate can be moved downward in the direction of the arrow 28. The total mutual vertical displacement corresponds to half the vertical distance between two holes.

Wie aus Fig. 1 ersichtlich ist, sind die beiden Haltegabeln 10, 12 aus einem einzigen gabelförmigen Bügel 30 gebildet, dessen beide Bügelschenkel in Längsrichtung geschlitzt sind.As can be seen from FIG. 1, the two holding forks 10, 12 are formed from a single fork-shaped bracket 30, the two bracket legs of which are slotted in the longitudinal direction.

Die Führungsplatten 14, 16 sind mit den Armen der Haltegabeln 10, 12 durch Schweißen verbunden.The guide plates 14, 16 are connected to the arms of the holding forks 10, 12 by welding.

Fig. 2 zeigt eine aus zwei nebeneinanderliegenden, zusammenhängenden Führungsplatten 14', 16' gebildete Gesamtplatte 32. Sie ist mit zwei Lochreihen 18', 20' versehen, deren gegenseitige Anordnung genau der in Fig. 1 dargestellten Anordnung, das heißt ohne vertikalten Versatz der Führungsplatten, entspricht. Die Gesamtplatte 32 wird als Ganzes mit den Haltegabeln 10, 12 verbunden. Danach wird die Gesamtplatte entlang-der mit 34 bezeichneten Trennlinien geteilt, wobei die exakte Ausrichtung der beiden Führungsplatten 14', 16' zueinander nicht verlorengeht.Fig. 2 shows an overall plate 32 formed from two adjacent, contiguous guide plates 14 ', 16'. It is provided with two rows of holes 18 ', 20', the mutual arrangement of which is exactly the arrangement shown in Fig. 1, that is, without a vertical offset Guide plates. The entire plate 32 is connected as a whole to the holding forks 10, 12. The entire plate is then divided along the dividing lines denoted by 34, the exact alignment of the two guide plates 14 ', 16' not lost to each other.

Fig. 3 zeigt eine Hilfsvorrichtung 40, in die der Bügel 30 für die Montage der Gesamtplatte 32 eingelegt wird. Die Hilfsvorrichtung gewährleistet eine exakte Ausrichtung der Haltegabeln 10, 12 sowie ihre Fixierung während der Montage der Gesamtplatte 32.Fig. 3 shows an auxiliary device 40, in which the bracket 30 is inserted for mounting the entire plate 32. The auxiliary device ensures an exact alignment of the holding forks 10, 12 and their fixing during the assembly of the entire plate 32.

Fig. 4 zeigt schematisch einen Nadeldruckkopf 2 entsprechend der Fig. 1. Dabei ist erkennbar, daß mit einer Auslenkung z.B. der Führungsplatte 14 nach oben gleichzeitig ein Versatz nach hinten um den Betrag s verbunden ist, da sich die Arme der Haltegabel 10 auf einem Bogen 36 um das eingespannte Ende 38 bewegen. Da die Haltegabel etwa nach Art eines Parallelogrammlenkers aufgebaut ist, bleibt die Führungsplatte 14 zu sich selbst parallel. Da gleichzeitig mit der Aufwärtsbewegung der Führungsplatte 14 eine Abwärtsbewegung der Führungsplatte 16 um den gleichen Betrag erfolgt, ergibt sich für beide Führungsplatten der gleiche Versatz s nach hinten, so daß ihre gegenseitige Ausrichtung senkrecht zu ihren Ebenen erhalten bleibt.Fig. 4 shows schematically a needle print head 2 corresponding to Fig. 1. It can be seen that with a deflection e.g. the guide plate 14 is connected at the same time an offset to the rear by the amount s, since the arms of the holding fork 10 move on an arc 36 around the clamped end 38. Since the holding fork is constructed approximately in the manner of a parallelogram handlebar, the guide plate 14 remains parallel to itself. Since a simultaneous downward movement of the guide plate 16 takes place by the same amount with the upward movement of the guide plate 14, the same offset s results to the rear for both guide plates, so that their mutual alignment perpendicular to their planes is maintained.

Claims (7)

1. Verfahren zur Herstellung der Nadelführung eines Nadeldruckkopfes, bei der mehrere Nadelgruppen jeweils durch eine gesonderte gelochte Führungsplatte geführt sind, die an dem Nadeldruckkopf montiert ist,
dadurch gekennzeichnet, - daß eine die Führungsplatten (14, 16) umfassende Gesamtplatte (32) mit dem Lochmuster der Führungsplatten (14, 16) versehen wird, - daß die gelochte Gesamtplatte (32) mit dem Nadeldruckkopf (2) verbunden wird, und - daß danach die Gesamtplatte (32) zur Bildung der einzelnen Führungsplatten (14, 16) geteilt wird. 1. A method for producing the needle guide of a needle print head, in which several needle groups are each guided through a separate perforated guide plate which is mounted on the needle print head,
characterized, - That a complete plate (32) comprising the guide plates (14, 16) is provided with the hole pattern of the guide plates (14, 16), - That the perforated overall plate (32) with the needle print head (2) is connected, and - That then the entire plate (32) to form the individual guide plates (14, 16) is divided. 2. Verfahren nach Anspruch 1 zur Herstellung einer Nadelführung, bei der wenigstens eine der Führungsplatten über eine bewegliche Halterung am Nadeldruckkopf gelagert ist, dadurch gekennzeichnet, daß jede der beweglichen Halterungen zur Montage der Gesamtplatte (32) in einer Montagestellung eingerichtet und fixiert wird.2. The method according to claim 1 for producing a needle guide, in which at least one of the guide plates is mounted on a movable holder on the needle print head, characterized in that each of the movable holders for mounting the entire plate (32) is set up and fixed in an assembly position. 3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Gesamtplatte (32) vor ihrer Verbindung mit dem Nadeldruckkopf (2) längs ihrer Teilungslinien (34) vorperforiert wird.3. The method according to any one of claims 1 or 2, characterized in that the entire plate (32) is pre-perforated along its dividing lines (34) before it is connected to the wire print head (2). 4. Nadelführung, hergestellt nach einem Verfahren gemäß Anspruch 1, mit wenigstens einer in ihrer Ebene beweglichen Führungsplatte, einer aus zwei nach Art eines Parallelogrammlenkers an dieser angreifenden Armen gebildeten Haltegabel sowie einem Stellantrieb zur Verstellung der Führungsplatte, dadurch gekennzeichnet,
daß die Arme der Haltegabeln (10, 12) jeweils in einer etwa senkrecht zur Führungsplattenebene liegenden Ebene angeordnet sind.4. needle guide, produced by a method according to claim 1, with at least one movable in its plane guide plate, one of two in the manner of a parallelogram linkage formed on this arm engaging arms and an actuator for adjusting the guide plate, characterized in that
that the arms of the holding forks (10, 12) are each arranged in a plane lying approximately perpendicular to the guide plate plane. 5. Nadelführung nach Anspruch 4, dadurch gekennzeichnet,
daß zwei in Druckzeilenrichtung nebeneinander angeordnete, jeweils an einer Haltegabel (10, 12) befestigte Führungsplatten (14, 16) vorgesehen sind, welche in Druckspaltenrichtung entgegengesetzt zueinander verstellbar sind.5. needle guide according to claim 4, characterized in
that two guide plates (14, 16) arranged next to one another in the printing line direction and each fastened to a holding fork (10, 12) are provided, which can be adjusted in the opposite direction to one another in the printing column direction. 6. Nadelführung nach Anspruch 5, dadurch gekennzeichnet,
daß die beiden Haltegabeln (10, 12) durch einen federnden, gabelförmigen Bügel (30) mit in Längsrichtung geschlitzten Bügelschenkeln gebildet sind.6. needle guide according to claim 5, characterized in
that the two holding forks (10, 12) are formed by a resilient, fork-shaped bracket (30) with slotted bracket legs in the longitudinal direction. 7. Nadelführung nach Anspruch 6, dadurch gekennzeichnet,
daß die Führungsplatten (14, 16) mit den Armen der Haltegabeln (10, 12) verschweißt sind.7. needle guide according to claim 6, characterized in
that the guide plates (14, 16) are welded to the arms of the holding forks (10, 12).
EP84110512A 1983-09-14 1984-09-04 Method of manufacturing a needle guide for a needle-printing head, and needle guide made by this method Expired EP0139190B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3333252A DE3333252C2 (en) 1983-09-14 1983-09-14 Process for the production of a dot matrix print head
DE3333252 1983-09-14

Publications (2)

Publication Number Publication Date
EP0139190A1 true EP0139190A1 (en) 1985-05-02
EP0139190B1 EP0139190B1 (en) 1986-12-10

Family

ID=6209103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110512A Expired EP0139190B1 (en) 1983-09-14 1984-09-04 Method of manufacturing a needle guide for a needle-printing head, and needle guide made by this method

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EP (1) EP0139190B1 (en)
DE (2) DE3333252C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105128544A (en) * 2015-09-01 2015-12-09 宁波荣大昌办公设备有限公司 Paper conveying structure under ink jetting area

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH667618A5 (en) * 1986-03-21 1988-10-31 Hermes Precisa International SWITCHABLE WRITING HEAD.
IT1247770B (en) * 1990-10-31 1994-12-30 Microlys Spa DOT MATRIX PRINT HEAD FOR HIGH DEFINITION OR HIGH SPEED PRINTING

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Publication number Priority date Publication date Assignee Title
DE2632293A1 (en) * 1975-08-01 1977-02-17 Ibm PRINT HEAD FOR MATRIX WIRE PRINTER
EP0052066A2 (en) * 1980-11-06 1982-05-19 MANNESMANN Aktiengesellschaft Matrix printer and wire print head therefor
EP0075342A2 (en) * 1981-09-18 1983-03-30 Hermes Precisa International S.A. Shiftable printhead

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Publication number Priority date Publication date Assignee Title
DE2203472A1 (en) * 1972-01-26 1973-08-09 Olympia Werke Ag BREAKTHROUGHS, IN PARTICULAR HOLES FOR OUTLET NOZZLES OF SPRAY HEADS FOR INK SPLIT PENS
DD128153A1 (en) * 1976-08-26 1977-11-02 Volker Flechtner MOSAIC HEAD
DE3022128C2 (en) * 1980-06-10 1983-12-08 Mannesmann AG, 4000 Düsseldorf Print head for generating print characters using the matrix printing process

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Publication number Priority date Publication date Assignee Title
DE2632293A1 (en) * 1975-08-01 1977-02-17 Ibm PRINT HEAD FOR MATRIX WIRE PRINTER
EP0052066A2 (en) * 1980-11-06 1982-05-19 MANNESMANN Aktiengesellschaft Matrix printer and wire print head therefor
EP0075342A2 (en) * 1981-09-18 1983-03-30 Hermes Precisa International S.A. Shiftable printhead

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105128544A (en) * 2015-09-01 2015-12-09 宁波荣大昌办公设备有限公司 Paper conveying structure under ink jetting area

Also Published As

Publication number Publication date
EP0139190B1 (en) 1986-12-10
DE3461612D1 (en) 1987-01-22
DE3333252C2 (en) 1986-02-13
DE3333252A1 (en) 1985-03-28

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