EP0281499A2 - Print gap adjustment device for thick record carriers in an office machine - Google Patents

Print gap adjustment device for thick record carriers in an office machine Download PDF

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Publication number
EP0281499A2
EP0281499A2 EP88730014A EP88730014A EP0281499A2 EP 0281499 A2 EP0281499 A2 EP 0281499A2 EP 88730014 A EP88730014 A EP 88730014A EP 88730014 A EP88730014 A EP 88730014A EP 0281499 A2 EP0281499 A2 EP 0281499A2
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EP
European Patent Office
Prior art keywords
print head
print
abutment
band
thick
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
EP88730014A
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German (de)
French (fr)
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EP0281499A3 (en
EP0281499B1 (en
Inventor
Alois Limberger
Bernhard Nolte
Dieter Stellmach
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 AT88730014T priority Critical patent/ATE78757T1/en
Publication of EP0281499A2 publication Critical patent/EP0281499A2/en
Publication of EP0281499A3 publication Critical patent/EP0281499A3/en
Application granted granted Critical
Publication of EP0281499B1 publication Critical patent/EP0281499B1/en
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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
    • 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
    • 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

Definitions

  • the invention relates to a device for adjusting the distance of a print head to thick print material in an office machine, in particular in a passbook or receipt printer, in which the print head can be moved back and forth between end positions on a print head carriage parallel to a print abutment and perpendicular to the print abutment against a spring force to the print abutment is employable, with at least one rotatable roller mounted on the print head face, which rests on a flexible belt running parallel to the platen, the flexible belt resting firmly on the thick print material during the printing process.
  • Such a device is known from DE-AS 22 34 616.
  • the known device is used for sensing in the sense of an automatic distance control between a print head and the paper to be printed.
  • the known device is intended to solve the problem of creating a paper thickness sensing device on printing units, which makes it possible to achieve an automatic adaptation of the distance between the printhead - paper and different paper thicknesses with simple means and not to complicate the introduction of recording media.
  • such a device can only offer advantages as a distance setting for several layers of paper, but not for print thicknesses that are approximately 0.3 and more millimeters up to a few millimeters.
  • the present invention is therefore based on the object of providing a distance setting for thick printed matter in which both the insertion of the printed matter and the indexing during the printing run without problems.
  • the flexible band is arranged at a parallel distance above the pressure abutment corresponding to the thickest material to be printed and is longitudinally fastened in the longitudinal directions at least to one end of the band under tension spring force in such a way that the print head carriage in sections of it End positions limited by the material to be lifted can be arranged in these end position sections in the flexible band cut-outs in which no support force can be transferred to the bendable band by means of the rotatable roller and that the flexible band unites at least to the length of the cut-outs laterally offset bandwidth section.
  • the flexible band is raised in the end positions of the print head carriage in such a way that printed matter of a few millimeters in thickness can be inserted without interference and that the line switching can be done easily can run without interference.
  • the flexible band it is possible to further increase the distance of the flexible band from the plane of the pressure abutment by concentrically having a ring shoulder with a reduced diameter concentric to its axis of rotation, the width of which corresponds approximately to the width of the laterally offset band width section. This not only increases the distance, but at the same time limits the tape stand in the end positions of the print head carriage, so that, in coordination with the thickest print material, sufficient space is possible to insert and advance the line feed.
  • the lifting of the printhead carriage takes place in that a second roller is rotatably mounted on the printhead carriage, in the course of which the path in the sections of the end positions has an incline which increases in the direction of movement, on which the circumference of the second roller can be supported in the end sections.
  • the attachment of the flexible band is advantageously achieved in that at the level of the pressure abutment in the longitudinal distance of the flexible band studs are provided, in which the flexible band is suspended or guided.
  • a multiform printer as an example of an office machine that works as a printer has a printer frame 1, which consists of side boards 2 and 3, cross struts 4 and 5 and guide axes 6 and 7 for a print head carriage 8.
  • the print head carriage 8 carries a print head 9, such an arrangement of a printer frame 1 for thick print material 10 being pivotably mounted about a horizontal axis 11 in a pair of bearing blocks 12 (FIG. 2).
  • the thick printed matter 10 shown in FIGS. 1 and 2 consists of passbooks, multilayer receipts and the like. thick print material.
  • the exemplary embodiment has a horizontal pressure abutment 13.
  • a leg spring 14 is attached, the legs 14a and 14b of which are supported on the printer frame 1 or on the print head carriage 8, so that the print head carriage 8 has the tendency to always move in the direction of the pressure abutment 13 with a roller 15.
  • This tendency can also be created with a more vertical position of the pressure abutment 13 (as a pressure roller), and the leg spring 14 can also be designed as a compression or tension spring.
  • the roller 15, which is rotatably mounted on the print head face 9a, lies on a flexible belt 16 made of metal, e.g. Spring steel, which runs parallel to the print abutment 13, just next to the print head face 9a, in order to keep the print material 10 in the area of the printing point at a constant distance from the print head face 9a. This distance is important with regard to the needle stroke.
  • the thickest printing material 10 to be processed in the office machine now determines a distance 17 parallel to the pressure abutment 13, at which the printing material 10, for example a passbook, can be easily pushed under the belt 16, or at the end positions 8a and 8b (in FIG 1 the print head carriage is in the right end position 8b) the print material 10 or the print head 9 can be shifted by a line feed step.
  • the band 16 (FIGS. 3 and 4) is at least with one band end 16a in the longitudinal direction 18 under the force of a tension spring 19 and is displaceably mounted in the longitudinal directions.
  • the bearing consists of stud bolts 20, 21, 22 and 23 fastened approximately on the plane 13a of the pressure abutment 13, each of which has ring incisions 24, in which slots 25 of the band 16 are guided.
  • the slots 25 can be open on one side or part of an approximately keyhole-shaped recess 26 for hanging the tape 16 (e.g. at the tape end 16b).
  • the print head carriage 8 can be raised via bevels 27 and 28 and a second roller 29 rotatably mounted on the print head carriage 8, specifically in horizontal sections 30 and 31, which can be approximately the same length as the bevels 27 and 28.
  • cutouts 32 and 33 are provided in the flexible belt 16, in which the rotatable roller 15 with its running surface 15a has no support on the flexible belt 16 Finds more (Fig. 1: End position 8b; Fig 5: End position 8a and Fig. 7: End position 8a).
  • an imaginary line 40 indicates that the axis 35 of the roller 15 and the axis of rotation 41 of the second roller 29 are located rigidly on the print head carriage 8.
  • the printhead carriage 8 is also in the end position 8a (FIG. 5), the second roller 29 just beginning when the printhead carriage 8 moves to the right on the bevel 27, which is part of a wedge piece 42 which is in the sections 30 and 31, respectively the cross strut 5 is attached to drive.
  • the tread 15a After leaving the incline 27, the tread 15a has again gripped the tape 16 and, as shown in FIG. 6, presses it down onto the print material 10 so that printing can be carried out with the print head 9.

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  • Common Mechanisms (AREA)
  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

In a print gap adjusting device for a print head (9) on a thick record carrier (10) in an office machine and especially in a savings book or voucher printer, the print head (9) can be moved backwards and forwards on a print head carriage (8) parallel to a platen backing (13) between end positions (8a, 8b) and is adjustable vertically to the platen backing (13) against a spring force (leg spring 14). In addition, at least one roll (15) is rotatably mounted on the front face of the print head (9a) and rests upon a flexible belt (16) extending parallel to the platen backing (13), the flexible belt (16) lying firmly on the thick record carrier (10) during the printing process. <??>In order to be able to process a record carrier several millimetres thick in a trouble-free manner with respect to insertion, withdrawal and line feed, it is proposed that the flexible belt (16) is secured under spring tension so as to be able to move longitudinally, that the print head carriage (8) is liftable in sections (30, 31) from its end positions (8a, 8b) and that cutouts (32,33) are arranged in the flexible belt (16), into which cutouts the rotatable roll (15) penetrates. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Abstandseinstellung eines Druckkopfes auf dickes Druckgut in einer Büromaschine, insbesondere in einem Sparbuch- oder Belegdrucker, in der der Druckkopf auf einem Druckkopfschlitten parallel zu einem Druckwiderlager zwischen Endstellungen hin- und herbwegbar und senkrecht zum Druckwiderlager entgegen einer Federkraft zum Druckwiderlager anstellbar ist, mit zumindest einer, an der Druckkopf-Stirnseite gelagerten, drehbaren Rolle, die auf einem biegsamen, parallel zum Druckwiderlager verlaufenden Band aufliegt, wobei das biegsame Band während des Druckvorganges auf dem dicken Druckgut fest aufliegt.The invention relates to a device for adjusting the distance of a print head to thick print material in an office machine, in particular in a passbook or receipt printer, in which the print head can be moved back and forth between end positions on a print head carriage parallel to a print abutment and perpendicular to the print abutment against a spring force to the print abutment is employable, with at least one rotatable roller mounted on the print head face, which rests on a flexible belt running parallel to the platen, the flexible belt resting firmly on the thick print material during the printing process.

Eine derartige Vorrichtung ist aus der DE-AS 22 34 616 bekannt. Die bekannte Vorrichtung dient zum Abfühlen im Sinne einer automatischen Abstandsregelung zwischen einem Druckkopf und dem zu bedruckenden Papier. Die bekannte Vorrichtung soll die Aufgabe lösen, eine Papierstärken-­Abfühlvorrichtung an Druckwerken zu schaffen, welche es ermöglicht, mit einfachen Mitteln eine automatische Anpassung des Abstandes Druckkopf - ­Papier and verschiedene Papierstärken zu erzielen und die Einführung von Aufzeichnungsträgern nicht zu erschweren. Eine derartige Vorrichtung vermag jedoch nur als Abstandseinstellung bei mehreren Papierschichten Vorteile zu bieten, jedoch nicht bei Druckgutdicken, die ca. 0,3 und mehr Millimeter bis zu einigen Millimetern betragen.Such a device is known from DE-AS 22 34 616. The known device is used for sensing in the sense of an automatic distance control between a print head and the paper to be printed. The known device is intended to solve the problem of creating a paper thickness sensing device on printing units, which makes it possible to achieve an automatic adaptation of the distance between the printhead - paper and different paper thicknesses with simple means and not to complicate the introduction of recording media. However, such a device can only offer advantages as a distance setting for several layers of paper, but not for print thicknesses that are approximately 0.3 and more millimeters up to a few millimeters.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Abstandseinstellung für dickes Druckgut zu schaffen, bei der sowohl das Einlegen des Druckgutes als auch das Weiterschalten beim Drucken störungsfrei verlaufen.The present invention is therefore based on the object of providing a distance setting for thick printed matter in which both the insertion of the printed matter and the indexing during the printing run without problems.

Die gestellte Aufgabe wird bei der eingangs bezeichneten Vorrichtung erfindungsgemäß dadurch gelöst, daß das biegsame Band in einem dem dicksten Druckgut entsprechenden, parallelen Abstand über dem Druckwiderlager angeordnet, in den Längsrichtungen zumindest an einem Bandende unter Zugfederkraft längsbeweglich befestigt ist, daß der Druckkopfschlitten in Abschnitten seiner Endstellungen begrenzt durch das Druckgut anhebbar ist, daß in diesen Endstellungs-Abschnitten in dem biegsamen Band Ausschnitte angeordnet sind, in denen mittels der drehbaren Rolle mit ihrer Lauffläche keine Stützkraft auf das biensame Band übertragbar ist und daß das biegsame Band zumindest auf Länge der Ausschnitte einen seitlich versetzten Bandbreitenabschnitt aufweist. Dadurch, daß in den Endstellungs-Abschnitten Ausschnitte vorgesehen sind, in die die drehbare Rolle eintauchen kann, wird in den Endstellungen des Druckkopfschlittens das biegsame Band derart angehoben, daß auch Druckgut von einigen Millimetern Dicke ohne Störung eingeschoben werden kann und daß die Zeilenschaltung ohne weiteres ablaufen kann, ohne daß Störungen auftreten.The stated object is achieved according to the invention in the device described in the introduction in that the flexible band is arranged at a parallel distance above the pressure abutment corresponding to the thickest material to be printed and is longitudinally fastened in the longitudinal directions at least to one end of the band under tension spring force in such a way that the print head carriage in sections of it End positions limited by the material to be lifted can be arranged in these end position sections in the flexible band cut-outs in which no support force can be transferred to the bendable band by means of the rotatable roller and that the flexible band unites at least to the length of the cut-outs laterally offset bandwidth section. Characterized in that cutouts are provided in the end position sections into which the rotatable roller can be immersed, the flexible band is raised in the end positions of the print head carriage in such a way that printed matter of a few millimeters in thickness can be inserted without interference and that the line switching can be done easily can run without interference.

Nach weiteren Merkmalen der Erfindung ist es möglich, den Abstand des biegsamen Bandes zur Ebene des Druckwiderlagers weiter zu vergrößern, indem die drehbare Rolle konzentrisch zu ihrer Drehachse einen im Durchmesser verminderten Ringabsatz aufweist, dessen Breite etwa der Breite des seitlich versetzten Bandbreitenabschnittes entspricht. Damit wird nicht nur eine Abstandsvergrößerung erzielt, sondern gleichzeitig der Bandstand in den Endstellungen des Druckkopfschlittens genau begrenzt, so daß in Abstimmung auf das dickste Druckgut genügend Raum zum Einschieben und Weiterschalten der Zeilenschaltung möglich ist.According to further features of the invention, it is possible to further increase the distance of the flexible band from the plane of the pressure abutment by concentrically having a ring shoulder with a reduced diameter concentric to its axis of rotation, the width of which corresponds approximately to the width of the laterally offset band width section. This not only increases the distance, but at the same time limits the tape stand in the end positions of the print head carriage, so that, in coordination with the thickest print material, sufficient space is possible to insert and advance the line feed.

Das Anheben des Druckkopfschlittens geschieht nach weiteren Merkmalen der Erfindung dadurch, daß an dem Druckkopfschlitten eine zweite Rolle drehbar gelagert ist, in deren Bahnverlauf in den Abschnitten der Endstellungen eine jeweils in Richtung der Bewegung ansteigende Schräge angeordnet ist, auf der der Umfang der zweiten Rolle in den Endabschnitten stützbar ist.According to further features of the invention, the lifting of the printhead carriage takes place in that a second roller is rotatably mounted on the printhead carriage, in the course of which the path in the sections of the end positions has an incline which increases in the direction of movement, on which the circumference of the second roller can be supported in the end sections.

Die Befestigung des biegsamen Bandes wird hierbei vorteilhafterweise dadurch erzielt, daß auf der Ebene des Druckwiderlagers im Längenabstand des biegsamen Bandes Stehbolzen vorgesehen sind, in denen das biegsame Band eingehängt bzw. längsgeführt ist.The attachment of the flexible band is advantageously achieved in that at the level of the pressure abutment in the longitudinal distance of the flexible band studs are provided, in which the flexible band is suspended or guided.

Hierbei kann noch die Längsbewegung des biegsamen Bandes dadurch erzielt werden, daß ein Bandende über eine Zugfeder mit dem zugehörigen Stehbolzen verbunden ist.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 eine Vorderansicht des Druckergestells eines Multiformdruckers (Sparbuch- oder Belegdrucker),
  • Fig. 2 eine etwas vergrößerte Seitenansicht des Druckergestells aus Fig. 1,
  • Fig. 3 eine Seitenansicht des biegsamen Bandes für sich alleine gezeichnet,
  • Fig. 4 eine Draufsicht auf das biegsame Band gemäß Fig. 3,
  • Fig. 5 eine Teil-Vorderansicht des Druckergestells, in der sich der Druckkopfschlitten in der linken Endstellung befindet,
  • Fig. 6 eine Teil-Vorderansicht wie Fig. 5, in der sich jedoch der Druckkopfschlitten in Druckbewegung befindet,
  • Fig. 7 eine perspecktivische Teil-Darstellung des biegsamen Bandes mit der Druckkopft-Rolle und der zweiten Rolle am Druckkopfschlitten (entspricht der Situation in Fig. 5) und
  • Fig. 8 eine perspektivische Teil-Darstellung des biegsamen Bandes mit der Druckkopf-Rolle und der zweiten Rolle am Druckkopfschlitten (entspricht der Situation in Fig. 6).
Here, the longitudinal movement of the flexible band can also be achieved in that a band end is connected to the associated stud bolt via a tension spring.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
  • 1 is a front view of the printer frame of a multiform printer (passbook or receipt printer),
  • 2 shows a somewhat enlarged side view of the printer frame from FIG. 1,
  • 3 is a side view of the flexible tape drawn by itself,
  • 4 is a plan view of the flexible band shown in FIG. 3,
  • 5 is a partial front view of the printer frame in which the print head carriage is in the left end position,
  • 6 is a partial front view like FIG. 5, but in which the print head carriage is in printing motion,
  • Fig. 7 is a partial perspective view of the flexible tape with the print head roller and the second roller on the print head carriage (corresponds to the situation in Fig. 5) and
  • Fig. 8 is a partial perspective view of the flexible tape with the print head roller and the second roller on the print head carriage (corresponds to the situation in Fig. 6).

Ein Multiformdrucker als Beispiels einer Büromaschine, die als Drucker arbeitet, weist ein Druckergestell 1 auf, das aus Seitenplatinen 2 und 3, Querstreben 4 und 5 sowie aus Führungsachsen 6 und 7 für einen Druckkopfschlitten 8 besteht. Der Druckkopfschlitten 8 trägt einen Druckkopf 9, wobei eine solche Anordnung eines Druckergestells 1 für dickes Druckgut 10 um eine horizontale Achse 11 in einem Lagerbockpaar 12 schwenkbar gelagert ist (Fig. 2). Das in den Figuren 1 und 2 gezeichnete dicke Druckgut 10 besteht aus Sparbüchern, mehrschichtigen Belegen u.dgl. dickem Druckgut. Das Ausführungsbeispiel weist ein horizontales Druckwiderlager 13 auf. Am Druckergestell 1 ist eine Schenkelfeder 14 befestigt, deren Schenkel 14a und 14b sich am Druckergestell 1 bzw. am Druckkopfschlitten 8 abstützen, so daß der Druckkopfschlitten 8 die Tendenz aufweist, sich mit einer Rolle 15 stets in Richtung zum Druckwiderlager 13 zu bewegen. Diese Tendenz kann auch bei einer mehr vertikalen Lage des Druckwiderlagers 13 (als Druckwalze) geschaffen werden, und die Schenkelfeder 14 kann auch als Druck- oder Zugfeder ausgestaltet sein, Die an der Druckkopf-Stirnseite 9a drehbar gelagerte Rolle 15 liegt auf einem biegsamen Band 16 aus Metall, z.B. Federstahl, auf, das parallel zum Druckwiderlager 13 verläuft, und zwar knapp neben der Druckkopft-Stirnseite 9a, um das Druckgut 10 im Bereich der Druckstelle mit konstantem Abstand zur Druckkopf-Stirnseite 9a zu halten. Dieser Abstand ist im Hinblick auf den Drucknadelhub von Bedeutung.A multiform printer as an example of an office machine that works as a printer has a printer frame 1, which consists of side boards 2 and 3, cross struts 4 and 5 and guide axes 6 and 7 for a print head carriage 8. The print head carriage 8 carries a print head 9, such an arrangement of a printer frame 1 for thick print material 10 being pivotably mounted about a horizontal axis 11 in a pair of bearing blocks 12 (FIG. 2). The thick printed matter 10 shown in FIGS. 1 and 2 consists of passbooks, multilayer receipts and the like. thick print material. The exemplary embodiment has a horizontal pressure abutment 13. On the printer frame 1, a leg spring 14 is attached, the legs 14a and 14b of which are supported on the printer frame 1 or on the print head carriage 8, so that the print head carriage 8 has the tendency to always move in the direction of the pressure abutment 13 with a roller 15. This tendency can also be created with a more vertical position of the pressure abutment 13 (as a pressure roller), and the leg spring 14 can also be designed as a compression or tension spring. The roller 15, which is rotatably mounted on the print head face 9a, lies on a flexible belt 16 made of metal, e.g. Spring steel, which runs parallel to the print abutment 13, just next to the print head face 9a, in order to keep the print material 10 in the area of the printing point at a constant distance from the print head face 9a. This distance is important with regard to the needle stroke.

Das in der Büromaschine zu verarbeitende dickste Druckgut 10 bestimmt nunmehr einen zum Druckwiderlager 13 parallelen Abstand 17, bei dem das Druckgut 10, z.B. ein Sparbuch, leicht unter das Band 16 geschoben werden kann, bzw. bei dem in Endstellungen 8a und 8b (in Fig. 1 befindet sich der Druckkopfschlitten in der rechten Endstellung 8b) das Druckgut 10 oder der Druckkopf 9 um einen Zeilenvorschubschritt verschoben werden kann.The thickest printing material 10 to be processed in the office machine now determines a distance 17 parallel to the pressure abutment 13, at which the printing material 10, for example a passbook, can be easily pushed under the belt 16, or at the end positions 8a and 8b (in FIG 1 the print head carriage is in the right end position 8b) the print material 10 or the print head 9 can be shifted by a line feed step.

Das Band 16 (Fig. 3 und 4) steht zumindest mit einem Bandende 16a in der Längsrichtung 18 unter der Kraft einer Zugfeder 19 und ist in den Längsrichtungen verschieblich gelagert. Die Lagerung besteht aus etwa auf der Ebene 13a des Druckwiderlagers 13 befestigten Stehbolzen 20, 21, 22 und 23, die jeweils Ringeinschnitte 24 aufweisen, in denen Schlitze 25 des Bandes 16 geführt sind. Die Schlitze 25 können einseitig offen sein oder Teil einer etwa schlüssellochartig geformten Ausnehmung 26 für das Einhängen des Bandes 16 (z.B. am Bandende 16b).The band 16 (FIGS. 3 and 4) is at least with one band end 16a in the longitudinal direction 18 under the force of a tension spring 19 and is displaceably mounted in the longitudinal directions. The bearing consists of stud bolts 20, 21, 22 and 23 fastened approximately on the plane 13a of the pressure abutment 13, each of which has ring incisions 24, in which slots 25 of the band 16 are guided. The slots 25 can be open on one side or part of an approximately keyhole-shaped recess 26 for hanging the tape 16 (e.g. at the tape end 16b).

Der Druckkopfschlitten 8 ist über Schrägen 27 und 28 und einer zweiten am Druckkopfschlitten 8 drehbar gelagerten Rolle 29 anhebbar, und zwar in horizontalen Abschnitten 30 und 31, die etwa gleich lang wie die Schrägen 27 und 28 sein können. In diesen Abschnitten 30 und 31 der Endstellungen 8a bzw. 8b des Druckkopfschlittens 8 sind in dem biegsamen Band 16 jeweils Ausschnitte 32 und 33 (Fig. 4) vorgesehen, in denen die drehbare Rolle 15 mit ihrer Lauffläche 15a keine Unterstützung auf dem biegsamen Band 16 mehr findet (Fig. 1: Endstellung 8b; Fig 5: Enstellung 8a und Fig. 7: Endstellung 8a). Das bedeutet, daß das Band 16 sobald der Druckkopfschlitten 8 in eine der Endstellungen 8a und 8b gelangt, nicht mehr der Anpreßkraft der Rolle 15 unterworfen ist und die Federkraft in dem Band 16 das Band 16 hochschnellen läßt. Diese Bewegung kann nunmehr begrenzt werden, indem im Bereich der Ausschnitte 32 und 33 das Band 16 einen seitlich versetzten Bandbreitenabschnitt 34 aufweist und die drehbare Rolle 15 konzentrisch zu ihrer Lauffläche 15a auf der Drehachse 35 einen im Durchmesser 36 (Fig. 8) verminderten Ringabsatz 37 aufweist, dessen Breite 38 etwa der Breite 39 des seitlich versetzten Bandbreitenabschnitts 34 entspricht. Währenddem also die zweite Rolle 29 durch ihren Umfang 29a auf den Schrägen 27 bzw. 28 in den End-Abschnitten 30 und 31 abstützbar ist und dadurch eine Anhebung des Druckkopfschlittens 8 zusammen mit der Rolle 15 erfolgt, die allerdings nur dem Höhenunterschied der Schräge 27 bzw. 28 entspricht, so daß durch die Zugkraft des Bandes 16 bereits ein Spalt (in der Praxis von z.B. 4 mm) zwischen dem Druckgut 10 und dem Band 16 entsteht, bewirkt der Ringabsatz 37 ein weiteres zusätzliches Anheben des Bandes 16, jedoch mit der Begrenzung auf den Durchmesser 36. In Fig. 8 ist durch eine gedachte Linie 40 angedeutet, daß die Achse 35 der Rolle 15 und die Drehachse 41 der zweiten Rolle 29 sich starr am Druckkopfschlitten 8 befinden.The print head carriage 8 can be raised via bevels 27 and 28 and a second roller 29 rotatably mounted on the print head carriage 8, specifically in horizontal sections 30 and 31, which can be approximately the same length as the bevels 27 and 28. In these sections 30 and 31 of the end positions 8a and 8b of the print head carriage 8, cutouts 32 and 33 (FIG. 4) are provided in the flexible belt 16, in which the rotatable roller 15 with its running surface 15a has no support on the flexible belt 16 Finds more (Fig. 1: End position 8b; Fig 5: End position 8a and Fig. 7: End position 8a). This means that the tape 16 as soon as the print head carriage 8 reaches one of the end positions 8a and 8b is no longer subjected to the contact pressure of the roller 15 and the spring force in the tape 16 causes the tape 16 to spring up. This movement can now be limited by the fact that in the region of the cutouts 32 and 33 the band 16 has a laterally offset band width section 34 and the rotatable roller 15 concentrically with its running surface 15a on the axis of rotation 35 has a ring shoulder 37 of reduced diameter 36 (FIG. 8) whose width 38 corresponds approximately to the width 39 of the laterally offset bandwidth section 34. Thus, while the second roller 29 can be supported by its circumference 29a on the bevels 27 and 28 in the end sections 30 and 31, and thus the printhead carriage 8 is raised together with the roller 15, which, however, only changes the height of the bevel 27 or 28 corresponds to the fact that due to the tensile force of the band 16 there is already a gap (in practice of 4 mm, for example) between the printed matter 10 and the band 16 arises, the ring shoulder 37 causes a further additional lifting of the band 16, but with the limitation to the diameter 36. In FIG. 8, an imaginary line 40 indicates that the axis 35 of the roller 15 and the axis of rotation 41 of the second roller 29 are located rigidly on the print head carriage 8.

Der Druckopfschlitten 8 befindet sich außerdem in der Endstellung 8a (Fig. 5), wobei die zweite Rolle 29 gerade beginnt, bei Rechtsbewegung des Druckkopfschlittens 8 auf die Schräge 27, die Teil eines Keilstückes 42 ist, das in den Abschnitten 30 bzw. 31 auf der Querstrebe 5 befestigt ist, zu fahren. Nach Verlassen der Scräge 27 hat aber auch die Lauffläche 15a wieder das Band 16 erfaßt und drückt dieses, wie in Fig. 6 gezeigt ist, nach unten auf das Druckgut 10, so daß mit dem Druckkopf 9 gedruckt werden kann.The printhead carriage 8 is also in the end position 8a (FIG. 5), the second roller 29 just beginning when the printhead carriage 8 moves to the right on the bevel 27, which is part of a wedge piece 42 which is in the sections 30 and 31, respectively the cross strut 5 is attached to drive. After leaving the incline 27, the tread 15a has again gripped the tape 16 and, as shown in FIG. 6, presses it down onto the print material 10 so that printing can be carried out with the print head 9.

Claims (5)

1. Vorrichtung zur Abstandseinstellung eines Druckkopfes auf dickes Druckgut in einer Büromaschine, insbesondere in einem Sparbuch- oder Belegrucker, in der der Druckkopf auf einem Druckkopfschlitten parallel zu einem Druckwiderlager zwischen Endstellungen hin- und herbewegbar und senkrecht zum Druckwiderlager entgegen einer Federkraft zum Druckwiderlager anstellbar ist, mit zumindest einer, an der Druckkopf-Stirnseite gelagerten, drehbaren Rolle, die auf einem biegsamen, parallel zum Druckwiderlager verlaufenden Band aufliegt, wobei das biegsame Band während des Druckvorganges auf dem dicken Druckgut fest aufliegt,
dadurch gekennzeichnet,
daß das biegsame Band (16) in einem dem dicksten Druckgut (10) entsprechenden, parallelen Abstand (17) über dem Druckwiderlager (13) angeordnet, in den Längsrichtungen (18) zumindest an einem Bandende (16a) unter Zugfederkraft längsbeweglich befestigt ist, daß der Druckkopfschlitten (8) in Abschnitten (30,31) seiner Endstellungen (8a,8b) begrenzt durch das Druckgut (10) anhebbar ist, daß in diesen Endstellungs- Abschnitten (30,31) in dem biegsamen Band (16) Ausschnitte (32,33) angeordnet sind, in denen mittels der drehbaren Rolle (15) mit ihrer Lauffläche (15a) keine Stützkraft auf das biegsame Band (16) übertragbar ist und daß das biegsame Band (16) zumindest auf Länge der Ausschnitte (32,33) einen seitlich versetzten Bandbreitenabschnitt (34) aufweist.1.Device for adjusting the distance of a print head to thick print material in an office machine, in particular in a passbook or receipt printer, in which the print head can be moved back and forth between end positions on a print head carriage parallel to a print abutment and can be adjusted perpendicular to the print abutment against a spring force against the print abutment , with at least one rotatable roller mounted on the front of the printhead, which rests on a flexible belt running parallel to the printing abutment, the flexible belt resting firmly on the thick print material during the printing process,
characterized,
that the flexible band (16) is arranged at a parallel distance (17) corresponding to the thickest material to be printed (10) above the pressure abutment (13), in the longitudinal directions (18) at least at one end of the band (16a) is fastened longitudinally under tension spring force that the print head carriage (8) can be raised in sections (30, 31) of its end positions (8a, 8b) limited by the print material (10), that in these end position sections (30, 31) in the flexible band (16) cutouts (32 , 33) are arranged in which no support force can be transmitted to the flexible band (16) by means of the rotatable roller (15) with its running surface (15a) and that the flexible band (16) at least along the length of the cutouts (32, 33) has a laterally offset bandwidth section (34). 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die drehbare Rolle (15) konzentrisch zu ihrer Drehachse (35) einen im Durchmesser (36) verminderten Ringabsatz (37) aufweist, dessen Breite (38) etwa der Breite (39) des seitlich versetzten Bandbreitenabschnitts (34) entspricht.2. Device according to claim 1,
characterized,
that the rotatable roller (15) concentric to its axis of rotation (35) has a reduced diameter (36) ring shoulder (37), the width (38) corresponds approximately to the width (39) of the laterally offset bandwidth section (34). 3. Vorrichtung nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet,
daß an dem Druckkopfschlitten (8) eine zweite Rolle (29) drehbar gelagert ist, in deren Bahnverlauf in den Abschnitten (30,31) der Endstellungen (8a,8b) eine jeweils in Richtung der Bewegung ansteigende Schräge (27,28) angeordnet ist, auf der der Umfang (29a) der zweiten Rolle (29) in den End-Abschnitten (30,31) stützbar ist.3. Device according to claims 1 and 2,
characterized,
that a second roller (29) is rotatably mounted on the print head carriage (8), in the path of which in the sections (30, 31) of the end positions (8a, 8b) a slope (27, 28) rising in the direction of movement is arranged on which the periphery (29a) of the second roller (29) can be supported in the end sections (30, 31). 4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß auf der Ebene (13a) des Druckwiderlagers (13) im Längenabstand des biegsamen Bandes (16) Stehbolzen (20,21,22,23) vorgesehen sind, in denen das biegsame Band (16) eingehängt bzw. längsgeführt ist.4. The device according to one or more of claims 1 to 3,
characterized,
that on the plane (13a) of the pressure abutment (13) in the longitudinal spacing of the flexible band (16) are provided stud bolts (20, 21, 22, 23) in which the flexible band (16) is suspended or guided longitudinally. 5. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß ein Bandende (16a) über eine Zugfeder (19) mit dem zugehörigen Stehbolzen (20) verbunden ist.5. The device according to claim 4,
characterized,
that a band end (16a) is connected via a tension spring (19) to the associated stud bolt (20).
EP88730014A 1987-02-28 1988-01-20 Print gap adjustment device for thick record carriers in an office machine Expired - Lifetime EP0281499B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88730014T ATE78757T1 (en) 1987-02-28 1988-01-20 DEVICE FOR ADJUSTING THE DISTANCE OF A PRINT HEAD FOR THICK PRINTING IN AN OFFICE MACHINE, ESPECIALLY IN A PASSBOOK OR RECEIPT PRINTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873706573 DE3706573A1 (en) 1987-02-28 1987-02-28 DEVICE FOR ADJUSTING A PRINT HEAD TO THICK PRINTED MATERIAL IN A OFFICE MACHINE, IN PARTICULAR IN A SPARBOOK OR RECEIPT PRINTER
DE3706573 1987-02-28

Publications (3)

Publication Number Publication Date
EP0281499A2 true EP0281499A2 (en) 1988-09-07
EP0281499A3 EP0281499A3 (en) 1990-02-28
EP0281499B1 EP0281499B1 (en) 1992-07-29

Family

ID=6322041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730014A Expired - Lifetime EP0281499B1 (en) 1987-02-28 1988-01-20 Print gap adjustment device for thick record carriers in an office machine

Country Status (9)

Country Link
US (1) US4893949A (en)
EP (1) EP0281499B1 (en)
JP (1) JPS63230380A (en)
KR (1) KR950000256B1 (en)
AT (1) ATE78757T1 (en)
CA (1) CA1288282C (en)
DE (2) DE3706573A1 (en)
ES (1) ES2034353T3 (en)
YU (1) YU37888A (en)

Cited By (4)

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EP0530777A2 (en) * 1991-09-03 1993-03-10 Canon Kabushiki Kaisha Sheet conveying apparatus
FR2720332A1 (en) * 1994-05-27 1995-12-01 Ier Printer with head adjustable according to thickness of document
FR2720331A1 (en) * 1994-05-27 1995-12-01 Ier Printing machine with moving guide for material to be printed
WO1997033756A2 (en) * 1996-03-12 1997-09-18 Siemens Nixdorf Informationssysteme Ag Document conveyor and stop device

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DE3913073A1 (en) * 1989-04-21 1990-10-25 Philips Patentverwaltung METHOD FOR ADJUSTING A PRINT GAP IN A PRINTER
US5000590A (en) * 1989-06-29 1991-03-19 Itt Corporation Print head adjustment mechanism
US4957382A (en) * 1989-12-06 1990-09-18 Ncr Corporation Platen-yoke apparatus for a printer using a floating platen
JP2586689B2 (en) * 1990-05-10 1997-03-05 富士通株式会社 Printing device
US5135316A (en) * 1990-05-29 1992-08-04 Juki Corporation Automatic print head position adjusting mechanism
DE9115445U1 (en) * 1991-12-13 1993-01-28 Siemens Nixdorf Informationssysteme Ag, 4790 Paderborn, De
DE69328703T2 (en) * 1992-06-10 2000-12-28 Canon Kk Device for limiting the movement of a recording material in a recording device
DE4309593C2 (en) * 1993-03-22 1995-03-09 Inkjet Systems Gmbh Co Kg Arrangement for guiding a record carrier
US5672015A (en) * 1994-04-11 1997-09-30 International Business Machines Corporation Apparatus and method for printing
JP4339718B2 (en) * 2004-02-18 2009-10-07 株式会社沖データ Printing device
CN106427198B (en) * 2016-11-03 2019-06-14 杭州宏华数码科技股份有限公司 A kind of PLATE SCREAM PRINTING and the united printing device of digit printing and printing method

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Cited By (8)

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EP0530777A2 (en) * 1991-09-03 1993-03-10 Canon Kabushiki Kaisha Sheet conveying apparatus
EP0530777A3 (en) * 1991-09-03 1994-01-26 Canon Kk
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FR2720332A1 (en) * 1994-05-27 1995-12-01 Ier Printer with head adjustable according to thickness of document
FR2720331A1 (en) * 1994-05-27 1995-12-01 Ier Printing machine with moving guide for material to be printed
WO1997033756A2 (en) * 1996-03-12 1997-09-18 Siemens Nixdorf Informationssysteme Ag Document conveyor and stop device
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Also Published As

Publication number Publication date
DE3706573C2 (en) 1989-02-09
YU37888A (en) 1990-10-31
US4893949A (en) 1990-01-16
KR950000256B1 (en) 1995-01-12
ES2034353T3 (en) 1993-04-01
EP0281499A3 (en) 1990-02-28
DE3873119D1 (en) 1992-09-03
DE3706573A1 (en) 1988-09-08
ATE78757T1 (en) 1992-08-15
KR880009796A (en) 1988-10-05
JPS63230380A (en) 1988-09-26
CA1288282C (en) 1991-09-03
EP0281499B1 (en) 1992-07-29

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