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EP3527390B1 - Device for adjustment of a printhead - Google Patents

Device for adjustment of a printhead Download PDF

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Publication number
EP3527390B1
EP3527390B1 EP18156645.6A EP18156645A EP3527390B1 EP 3527390 B1 EP3527390 B1 EP 3527390B1 EP 18156645 A EP18156645 A EP 18156645A EP 3527390 B1 EP3527390 B1 EP 3527390B1
Authority
EP
European Patent Office
Prior art keywords
screw
spring
holder
cone
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.)
Active
Application number
EP18156645.6A
Other languages
German (de)
French (fr)
Other versions
EP3527390A1 (en
Inventor
Andreas MÜLLER
Dr. Burkhard Wolf
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Priority to EP18156645.6A priority Critical patent/EP3527390B1/en
Priority to CN201910112406.1A priority patent/CN110154529B/en
Priority to JP2019000496U priority patent/JP3221875U/en
Publication of EP3527390A1 publication Critical patent/EP3527390A1/en
Application granted granted Critical
Publication of EP3527390B1 publication Critical patent/EP3527390B1/en
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Anticipated expiration legal-status Critical

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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
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04505—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at correcting alignment
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns

Definitions

  • the present invention relates to a device for adjusting a printhead, comprising a holder, a screw with a cone, the screw being screwed into the holder and the printhead resting on the cone.
  • Adjustment devices are used for this purpose, each of which has a screw with a cone.
  • the respective printhead lies directly on the cone or indirectly via an intermediate piece.
  • the cone forms a thrust wedge gear, which converts an axial movement of the screw into a radial movement of the printhead.
  • the object of the invention is to provide an adjustment device for a printhead that works precisely.
  • a device for adjusting a print head which comprises a holder and a screw with a cone, the screw being screwed into the holder and the print head resting on the cone.
  • the device according to the invention is characterized in that a spring is present in order to reduce a thread play between the holder and the screw, and in that there is a detent in order to determine an increment when the screw is turned.
  • the device according to the invention works with high precision because the spring compensates for the play between the external thread of the screw and the internal thread of the holder.
  • An additional advantage of the spring is its effect as securing the screw against unintentional twisting.
  • the thread friction is increased by the spring and the screw is thereby braked so that it cannot turn itself.
  • the step-by-step or step-by-step turning of the screw which is made possible by the detent, enables a more precise adjustment than the stepless turning of the screw in the prior art.
  • the detent ensures that a very precise adjustment movement with haptic feedback can be transmitted with each detent step. This reliably prevents oversteering and understeering.
  • a head of the screw can form a locking disk of the locking.
  • the detent can have grooves that run axially parallel with the screw.
  • the spring can be arranged so that it acts axially with respect to the screw.
  • the spring can be placed on the screw.
  • the spring is arranged such that it acts radially with respect to the screw.
  • the holder can have a clamping bush which is loaded by the spring.
  • Figure 1 shows a printing press with a plurality of printing bars 1 for inkjet printing on printing material made of paper or cardboard.
  • the printing material is in the form of a sheet, but could also be in the form of a web.
  • the pressure bars 1 are structurally identical, so that only one pressure bar 1 needs to be described.
  • the print bar 1 has print heads 2 in a row that are perpendicular to the plane of the drawing Figure 1 runs. The row of print heads 2 extends across the width of the format of the printing material and the printing bar 1 is used for page-wide printing.
  • An adjustment device is associated with each print head 2, with which the print head 2 can be adjusted relative to its adjacent print heads 2. This adjustment movement of the print head 2, which is driven by the adjustment device, can be translational or rotary.
  • the adjustment device in the Figures 2 and 3 comprises a holder 9 into which a screw 4 is screwed.
  • the screw 4 has a cone 7, against which the print head 2 rests via an intermediate piece.
  • the screw 4 has a head 8, which serves as a handle or rotary knob for turning the screw 4 without tools.
  • a catch 9 which comprises a spring-loaded pressure piece 11, for example a ball, and index depressions.
  • the detent 9 is a multiple detent.
  • the Pressure piece 11 enters a different index recess with each turning step of screw 4.
  • the screw 4 is thus rotated in a very controlled manner, index-by-index.
  • the row of index depressions is introduced along the circumference of a locking disk, the index depressions being uniformly distributed at a constant angular distance from one another.
  • the locking disc is formed by the head 8 of the screw 4.
  • the head 8 in double function forms the handle for turning the screw 4 on the one hand and the locking disk of the detent 9 on the other hand.
  • the index depressions are designed as grooves 10 and are referred to as such below.
  • the grooves 10 run in the longitudinal direction parallel to the axis of rotation of the screw 4.
  • Each groove 10 is longer than the maximum axial displacement of the screw 4 when adjusting.
  • the path difference that results from screwing the screw 4 into the holder 3 is compensated for by the groove length. Regardless of how deep the screw 4 is screwed into the holder 3, the pressure piece 11 can enter a groove 10.
  • the grooves 10 are introduced into the head 8 and thus increase the grip of the rotary knob formed by the head 8, which is advantageous.
  • the clamping device comprises a pair of clamping pliers or clamping bushing 12 which is formed on the holder 3.
  • a slot 13 is made in the holder 3, which runs parallel to the axis of rotation of the screws 4.
  • a wall of the bore is interrupted, which is introduced into the holder 3 and receives the screw 4.
  • the slot 13 has an open end that in the edge said wall opens.
  • the slot 13 has a closed end, in which the slot width is expanded in a circular shape to form a type of flexible joint.
  • a spring 14 loads the clamping bush 12 in the radial direction with respect to the screw 4.
  • the clamping bush 12 is compressed by the spring 14, the two side walls of the slot 13 approaching each other somewhat.
  • the internal thread 6 closes more tightly around the external thread 5, as a result of which the thread play is minimized.
  • the spring 14 is supported at one end on the clamping bush 12 and at the other end on a screw 15. This screw 15 is screwed into the holder 3 transversely to the screw 4.
  • the spring 14 is a helical spring which can be subjected to pressure and is seated on the shaft of the screw 15. The pretensioning of the spring 14 can be adjusted by turning the screw 15.
  • the clamping device is formed by a spring 16 which is supported at one end on the head 8 of the screw 4 and at the other end on the holder 3.
  • the spring 16 is a coil spring which can be subjected to pressure and is seated on the screw 4 which is inserted through the spring 16.
  • the spring 16 acts with respect to the screw 4 in the axial direction and strives to push the screw 4 out of the holder 3. As a result, the external thread 5 of the screw 4 is pressed against the internal thread 6 of the holder 3, as a result of which the thread play between the two is minimized.

Landscapes

  • Ink Jet (AREA)
  • Common Mechanisms (AREA)

Description

Vorliegende Erfindung betrifft eine Vorrichtung zur Justage eines Druckkopfs, umfassend einen Halter, eine Schraube mit einem Konus, wobei die Schraube in den Halter eingeschraubt ist und der Druckkopf an dem Konus anliegt.The present invention relates to a device for adjusting a printhead, comprising a holder, a screw with a cone, the screw being screwed into the holder and the printhead resting on the cone.

Bei Druckbalken mit einer Reihe von Druckköpfen müssen die Druckköpfe zueinander justiert werden. Dazu dienen Justage-Vorrichtungen, die jeweils eine Schraube mit einem Konus aufweisen. An dem Konus liegt der jeweilige Druckkopf direkt oder über ein Zwischenstück indirekt an. Der Konus bildet ein Schubkeilgetriebe, das eine axiale Bewegung der Schraube in eine zu ihr radiale Bewegung des Druckkopfs umsetzt.In the case of print bars with a row of print heads, the print heads must be aligned with one another. Adjustment devices are used for this purpose, each of which has a screw with a cone. The respective printhead lies directly on the cone or indirectly via an intermediate piece. The cone forms a thrust wedge gear, which converts an axial movement of the screw into a radial movement of the printhead.

In US 2009/0147048 A1 ist eine solche Justage-Vorrichtung beschrieben. Deren Präzision wird durch das Gewindespiel, also das Spiel zwischen dem Außengewinde der Schraube und dem Innengewinde des Halters, beeinträchtigt.In US 2009/0147048 A1 such an adjustment device is described. Their precision is impaired by the thread play, i.e. the play between the external thread of the screw and the internal thread of the holder.

Außerdem leidet die Präzision darunter, dass der Bediener beim Justieren ein Übersteuern oder Untersteuern nicht immer vermeiden kann, weil das Drehen der Schraube stufenlos erfolgt.In addition, the precision suffers from the fact that the operator cannot always avoid oversteering or understeering during adjustment because the screw is turned continuously.

Aufgabe der Erfindung ist, eine Justage-Vorrichtung für einen Druckkopf zu schaffen, die präzise arbeitet.The object of the invention is to provide an adjustment device for a printhead that works precisely.

Die Aufgabe wird durch eine Vorrichtung zur Justage eines Druckkopfs gelöst, die einen Halter und eine Schraube mit einem Konus umfasst, wobei die Schraube in den Halter eingeschraubt ist und der Druckkopf an dem Konus anliegt. Die erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, dass eine Feder vorhanden ist, um ein Gewindespiel zwischen dem Halter und der Schraube zu verringern, und dass eine Rastung vorhanden ist, um eine Schrittweite beim Drehen der Schraube zu bestimmen.The object is achieved by a device for adjusting a print head, which comprises a holder and a screw with a cone, the screw being screwed into the holder and the print head resting on the cone. The device according to the invention is characterized in that a spring is present in order to reduce a thread play between the holder and the screw, and in that there is a detent in order to determine an increment when the screw is turned.

Die erfindungsgemäße Vorrichtung arbeitet hochpräzise, weil durch die Feder das Spiel zwischen dem Außengewinde der Schraube und dem Innengewinde des Halters kompensiert wird.The device according to the invention works with high precision because the spring compensates for the play between the external thread of the screw and the internal thread of the holder.

Ein Zusatzvorteil der Feder ist ihre Wirkung als Sicherung der Schraube gegen ein unbeabsichtigtes Verdrehen. Durch die Feder wird die Gewindereibung erhöht und dadurch die Schraube gebremst, so dass sie sich nicht selbsttätig verdrehen kann.An additional advantage of the spring is its effect as securing the screw against unintentional twisting. The thread friction is increased by the spring and the screw is thereby braked so that it cannot turn itself.

Überraschenderweise ist durch das stufen- bzw. schrittweise Drehen der Schraube, welches durch die Rastung ermöglicht wird, eine präzisere Justage als durch das stufenlose Drehen der Schraube beim Stand der Technik möglich. Die Rastung bewirkt bei manueller Bedienung, dass mit jedem Rastschritt eine sehr präzise Einstellbewegung mit haptischer Rückmeldung übertragen werden kann. Dadurch wird ein Übersteuern und Untersteuern sicher vermieden.Surprisingly, the step-by-step or step-by-step turning of the screw, which is made possible by the detent, enables a more precise adjustment than the stepless turning of the screw in the prior art. With manual operation, the detent ensures that a very precise adjustment movement with haptic feedback can be transmitted with each detent step. This reliably prevents oversteering and understeering.

In manchen Anwendungsfällen kann nur eine der beiden technischen Maßnahmen - die Feder und die Rastung - allein ausreichend sein, um die notwendige Präzision der Justage zu gewährleisten.In some applications, only one of the two technical measures - the spring and the detent - alone can be sufficient to ensure the necessary precision of the adjustment.

Es sind verschiedene Weiterbildungen möglich:
Ein Kopf der Schraube kann eine Rastscheibe der Rastung bilden.Various further training courses are possible:
A head of the screw can form a locking disk of the locking.

Die Rastung kann Nuten aufweisen, die mit der Schraube achsparallel verlaufen.The detent can have grooves that run axially parallel with the screw.

Die Feder kann so angeordnet sein, dass sie bezüglich der Schraube axial wirkt.The spring can be arranged so that it acts axially with respect to the screw.

Dazu kann die Feder auf die Schraube gesteckt sein.For this purpose, the spring can be placed on the screw.

Bei einer weiteren Weiterbildung ist die Feder so angeordnet, dass sie bezüglich der Schraube radial wirkt.In a further development, the spring is arranged such that it acts radially with respect to the screw.

Dazu kann der Halter eine Klemmbuchse aufweisen, die durch die Feder belastet ist.For this purpose, the holder can have a clamping bush which is loaded by the spring.

Weiterbildungen ergeben sich auch aus der nachfolgenden Beschreibung von Ausführungsbeispielen und der zugehörigen Zeichnung, in welcher zeigt:

Figur 1:
eine Druckmaschine mit einem Druckbalken für InkJet,
Figur 2:
einen Druckkopf des Druckbalkens und ein erste Ausführungsbeispiel einer Justage-Vorrichtung für den Druckkopf und
Figur 3:
den Druckkopf und ein zweites Ausführungsbeispiel für die Justage-Vorrichtung.
Further developments also result from the following description of exemplary embodiments and the associated drawing, in which:
Figure 1:
a printing machine with a printing bar for InkJet,
Figure 2:
a print head of the print bar and a first embodiment of an adjustment device for the print head and
Figure 3:
the printhead and a second embodiment for the adjustment device.

Figur 1 zeigt eine Druckmaschine mit mehreren Druckbalken 1 für Tintenstrahldruck auf Bedruckstoff aus Papier oder Karton. Der Bedruckstoff hat die Form von Bogen, könnte aber auch die Form einer Bahn haben. Die Druckbalken 1 sind baugleich, so dass nur ein Druckbalken 1 beschrieben werden braucht. Der Druckbalken 1 weist Druckköpfe 2 in einer Reihe auf, die senkrecht zur Zeichnungsebene von Figur 1 verläuft. Die Reihe von Druckköpfen 2 erstreckt sich über die Breite des Formats des Bedruckstoffs und der Druckbalken 1 dient zum seitenbreiten Druck. Figure 1 shows a printing press with a plurality of printing bars 1 for inkjet printing on printing material made of paper or cardboard. The printing material is in the form of a sheet, but could also be in the form of a web. The pressure bars 1 are structurally identical, so that only one pressure bar 1 needs to be described. The print bar 1 has print heads 2 in a row that are perpendicular to the plane of the drawing Figure 1 runs. The row of print heads 2 extends across the width of the format of the printing material and the printing bar 1 is used for page-wide printing.

Jedem Druckkopf 2 ist eine Justage-Vorrichtung beigeordnet, mit welcher der Druckkopf 2 relativ zu seinen benachbarten Druckköpfen 2 verstellt werden kann. Diese von der Justage-Vorrichtung angetriebene Verstellbewegung des Druckkopfs 2 kann translativ oder rotativ sein.An adjustment device is associated with each print head 2, with which the print head 2 can be adjusted relative to its adjacent print heads 2. This adjustment movement of the print head 2, which is driven by the adjustment device, can be translational or rotary.

Die in den Figuren 2 und 3 gezeigten Ausführungsbeispiele der Justage-Vorrichtung weisen Gemeinsamkeiten auf, welche zuerst beschrieben werden. Für in den Figuren 2 und 3 einander entsprechende Bauteile werden die gleichen Bezugszeichen verwendet.The in the Figures 2 and 3 Exemplary embodiments of the adjustment device shown have similarities, which will be described first. For in the Figures 2 and 3 Corresponding components the same reference numerals are used.

Die Justage-Vorrichtung in den Figuren 2 und 3 umfasst einen Halter 9, in den eine Schraube 4 eingeschraubt ist. Die Schraube 4 hat einen Konus 7, an welchem über ein Zwischenstück der Druckkopf 2 anliegt. Die Schraube 4 hat einen Kopf 8, welcher als Griff oder Drehknauf zum werkzeuglosen Drehen der Schraube 4 dient.The adjustment device in the Figures 2 and 3 comprises a holder 9 into which a screw 4 is screwed. The screw 4 has a cone 7, against which the print head 2 rests via an intermediate piece. The screw 4 has a head 8, which serves as a handle or rotary knob for turning the screw 4 without tools.

Es ist eine Rastung 9 vorhanden, welche ein gefedertes Druckstück 11, z.B. eine Kugel, und Index-Vertiefungen umfasst. Die Rastung 9 ist eine Mehrfach-Rastung. Das Druckstück 11 tritt bei jedem Drehschritt der Schraube 4 in eine andere Index-Vertiefung ein. Die Schraube 4 wird somit Index-Vertiefung für Index-Vertiefung sehr kontrolliert gedreht. Die Reihe von Index-Vertiefungen ist entlang des Umfangs einer Rastscheibe eingebracht, wobei die Index-Vertiefungen im konstantem Winkelabstand zueinander gleichmäßig verteilt sind. Die Rastscheibe wird durch den Kopf 8 der Schraube 4 gebildet.There is a catch 9, which comprises a spring-loaded pressure piece 11, for example a ball, and index depressions. The detent 9 is a multiple detent. The Pressure piece 11 enters a different index recess with each turning step of screw 4. The screw 4 is thus rotated in a very controlled manner, index-by-index. The row of index depressions is introduced along the circumference of a locking disk, the index depressions being uniformly distributed at a constant angular distance from one another. The locking disc is formed by the head 8 of the screw 4.

Vorteilhaft ist, dass der Kopf 8 in Doppelfunktion einerseits den Griff zum Drehen der Schraube 4 und andererseits die Rastscheibe der Rastung 9 bildet.It is advantageous that the head 8 in double function forms the handle for turning the screw 4 on the one hand and the locking disk of the detent 9 on the other hand.

Die Index-Vertiefungen sind als Nuten 10 ausgebildet und werden nachfolgend als solche bezeichnet. Die Nuten 10 verlaufen in Längsrichtung parallel mit der Rotationsachse der Schraube 4. Jede Nut 10 ist länger als der maximale axiale Verstellweg der Schraube 4 beim Justieren. Durch die Nutlänge wird die Wegdifferenz kompensiert, die aus dem Einschrauben der Schraube 4 in den Halter 3 resultiert. Unabhängig davon, wie tief die Schraube 4 in den Halter 3 eingeschraubt wird, vermag das Druckstück 11 in eine Nut 10 einzutreten.The index depressions are designed as grooves 10 and are referred to as such below. The grooves 10 run in the longitudinal direction parallel to the axis of rotation of the screw 4. Each groove 10 is longer than the maximum axial displacement of the screw 4 when adjusting. The path difference that results from screwing the screw 4 into the holder 3 is compensated for by the groove length. Regardless of how deep the screw 4 is screwed into the holder 3, the pressure piece 11 can enter a groove 10.

Die Nuten 10 sind in den Kopf 8 eingebracht und erhöhen somit die Griffigkeit des durch den Kopf 8 gebildeten Drehknaufs, was vorteilhaft ist.The grooves 10 are introduced into the head 8 and thus increase the grip of the rotary knob formed by the head 8, which is advantageous.

Zwischen einem Außengewinde 5 der Schraube 4 und einem Innengewinde 6 des Halters 3, in welches das Außengewinde 5 eingeschraubt ist, ist ein gewisses Gewindespiel vorhanden. Um dieses Gewindespiel zu minimieren, ist eine Klemmeinrichtung vorhanden, die bei den beiden Ausführungsbeispielen unterschiedlich ist, weshalb nachfolgend die Figuren 2 und 3 getrennt voneinander weiterbeschrieben werden.A certain thread play is present between an external thread 5 of the screw 4 and an internal thread 6 of the holder 3, into which the external thread 5 is screwed. In order to minimize this thread play, there is a clamping device which is different in the two exemplary embodiments, which is why the following Figures 2 and 3 described separately from each other.

Bei dem Ausführungsbeispiel in Figur 2 umfasst die Klemmeinrichtung eine Klemmzange oder Klemmbuchse 12, die an dem Halter 3 ausgebildet ist. Dazu ist in den Halter 3 ein Schlitz 13 eingebracht, der mit der Rotationsachse der Schrauben 4 parallel verläuft. Durch den Schlitz 13 wird eine Wand der Bohrung unterbrochen, die in den Halter 3 eingebracht ist und die Schraube 4 aufnimmt. Der Schlitz 13 hat ein offenes Ende, das im Rand besagter Wand mündet. Außerdem hat der Schlitz 13 ein geschlossenes Ende, bei dem die Schlitzbreite in Kreisform erweitert ist, um eine Art Biegegelenk zu bilden.In the embodiment in Figure 2 the clamping device comprises a pair of clamping pliers or clamping bushing 12 which is formed on the holder 3. For this purpose, a slot 13 is made in the holder 3, which runs parallel to the axis of rotation of the screws 4. Through the slot 13, a wall of the bore is interrupted, which is introduced into the holder 3 and receives the screw 4. The slot 13 has an open end that in the edge said wall opens. In addition, the slot 13 has a closed end, in which the slot width is expanded in a circular shape to form a type of flexible joint.

Eine Feder 14 belastet die Klemmbuchse 12 in bezüglich der Schraube 4 radialer Richtung. Durch die Feder 14 wird die Klemmbuchse 12 zusammengedrückt, wobei sich die beiden Seitenwände des Schlitzes 13 einander etwas nähern. Infolgedessen schließt sich das Innengewinde 6 enger um das Außengewinde 5, wodurch das Gewindespiel minimiert wird. Die Feder 14 stützt sich mit ihrem einen Ende auf der Klemmbuchse 12 und mit ihrem anderen Ende auf einer Schraube 15 ab. Diese Schraube 15 ist quer zur Schraube 4 in den Halter 3 eingeschraubt. Die Feder 14 ist eine auf Druck belastbare Schraubenfeder und sitzt auf dem Schaft der Schraube 15. Durch ein Verdrehen der Schraube 15 lässt sich die Vorspannung der Feder 14 einstellen.A spring 14 loads the clamping bush 12 in the radial direction with respect to the screw 4. The clamping bush 12 is compressed by the spring 14, the two side walls of the slot 13 approaching each other somewhat. As a result, the internal thread 6 closes more tightly around the external thread 5, as a result of which the thread play is minimized. The spring 14 is supported at one end on the clamping bush 12 and at the other end on a screw 15. This screw 15 is screwed into the holder 3 transversely to the screw 4. The spring 14 is a helical spring which can be subjected to pressure and is seated on the shaft of the screw 15. The pretensioning of the spring 14 can be adjusted by turning the screw 15.

Bei dem Ausführungsbeispiel in Figur 3 wird die Klemmeinrichtung durch eine Feder 16 gebildet, welche mit ihrem einen Ende auf dem Kopf 8 der Schraube 4 und mit ihrem anderen Ende auf dem Halter 3 abgestützt ist. Die Feder 16 ist eine auf Druck belastbare Schraubenfeder und sitzt auf der Schraube 4, welche durch die Feder 16 hindurch gesteckt ist. Die Feder 16 wirkt bezüglich der Schraube 4 in axialer Richtung und ist bestrebt, die Schraube 4 aus dem Halter 3 heraus zu schieben. Dadurch wird das Außengewinde 5 der Schraube 4 gegen das Innengewinde 6 des Halters 3 gepresst, wodurch das Gewindespiel zwischen beiden minimiert wird.In the embodiment in Figure 3 the clamping device is formed by a spring 16 which is supported at one end on the head 8 of the screw 4 and at the other end on the holder 3. The spring 16 is a coil spring which can be subjected to pressure and is seated on the screw 4 which is inserted through the spring 16. The spring 16 acts with respect to the screw 4 in the axial direction and strives to push the screw 4 out of the holder 3. As a result, the external thread 5 of the screw 4 is pressed against the internal thread 6 of the holder 3, as a result of which the thread play between the two is minimized.

Der Vorteil des Ausführungsbeispiels nach Figur 2 gegenüber jenem nach Figur 3 ist, dass bei dem Ausführungsbeispiel in Figur 2 die von der Feder 14 erzeugte Klemmkraft bei jeder Einschraubtiefe der Schraube 4 gleich groß ist.The advantage of the embodiment according to Figure 2 compared to that Figure 3 is that in the embodiment in Figure 2 the clamping force generated by the spring 14 is the same for each screw-in depth of the screw 4.

Der Vorteil des Ausführungsbeispiels nach Figur 3 gegenüber jenem nach Figur 2 ist, dass bei dem Ausführungsbeispiel in Figur 3 für die Lagerung der Feder 16 weniger Bauteile erforderlich sind, weil dazu der ohnehin vorhandene Schaft der Schraube 4 genutzt wird.The advantage of the embodiment according to Figure 3 compared to that Figure 2 is that in the embodiment in Figure 3 fewer components are required for the mounting of the spring 16, because the shaft of the screw 4, which is already present, is used for this purpose.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Druckbalkenpressure beam
22
Druckkopfprinthead
33
Halterholder
44
Schraubescrew
55
Außengewindeexternal thread
66
Innengewindeinner thread
77
Konuscone
88th
Kopfhead
99
Rastunglatching
1010
Nutgroove
1111
DruckstückPressure piece
1212
Klemmbuchseterminal Block
1313
Schlitzslot
1414
Federfeather
1515
Schraubescrew
1616
Federfeather

Claims (7)

  1. Device for adjusting a print head (2), comprising a mount (3), a screw (4) with a cone (7), the screw (4) screwed into the mount (3) and the print head (2) resting against the cone (7),
    characterized
    in that a spring (14, 16) is provided to reduce thread backlash between the mount (3) and the screw (4), and in that a ratchet mechanism (9) is provided to define a step width when the screw is turned (4).
  2. Device according to claim 1,
    characterized in
    that a head (8) of the screw (4) forms a ratchet disk of the ratchet mechanism (9).
  3. Device according to claim 1 or 2,
    characterized
    in that the ratchet mechanism (9) has grooves (10) parallel to the axis of the screw (4).
  4. Device according to any one of claims 1 to 3,
    characterized
    in that the spring (16) acts in an axial direction relative to the screw (4).
  5. Device according to claim 4,
    characterized
    in that the spring (16) is fitted on the screw (4).
  6. Device according to any one of claims 1 to 3,
    characterized
    in that the spring (14) acts in a radial direction relative to the screw (4).
  7. Device according to claim 6,
    characterized
    in that the mount (3) has a clamping bush (12) that is loaded by the spring (14).
EP18156645.6A 2018-02-14 2018-02-14 Device for adjustment of a printhead Active EP3527390B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18156645.6A EP3527390B1 (en) 2018-02-14 2018-02-14 Device for adjustment of a printhead
CN201910112406.1A CN110154529B (en) 2018-02-14 2019-02-13 Apparatus for calibrating a print head
JP2019000496U JP3221875U (en) 2018-02-14 2019-02-14 Device to adjust the print head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18156645.6A EP3527390B1 (en) 2018-02-14 2018-02-14 Device for adjustment of a printhead

Publications (2)

Publication Number Publication Date
EP3527390A1 EP3527390A1 (en) 2019-08-21
EP3527390B1 true EP3527390B1 (en) 2020-02-19

Family

ID=61223797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18156645.6A Active EP3527390B1 (en) 2018-02-14 2018-02-14 Device for adjustment of a printhead

Country Status (3)

Country Link
EP (1) EP3527390B1 (en)
JP (1) JP3221875U (en)
CN (1) CN110154529B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023107319B3 (en) 2023-03-23 2024-02-15 Heidelberger Druckmaschinen Aktiengesellschaft Device for adjusting a print head
DE102024104484A1 (en) 2023-03-23 2024-09-26 Heidelberger Druckmaschinen Aktiengesellschaft Printing unit of an inkjet printing machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293774B (en) * 2019-07-26 2023-11-14 河南印都数码科技有限公司 Printer nozzle adjusting structure
JP7435108B2 (en) * 2020-03-19 2024-02-21 京セラドキュメントソリューションズ株式会社 inkjet recording device

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Publication number Priority date Publication date Assignee Title
US5428375A (en) * 1992-05-29 1995-06-27 Simon; Robert J. Multiple print head ink jet printer
DE19581389T1 (en) * 1994-10-06 1996-12-05 Pfu Ltd Paper feed method and apparatus for a printer
US5870117A (en) * 1997-01-21 1999-02-09 Xerox Corporation Liquid ink printer including a camming printhead to enable increased resolution printing
JPH10235965A (en) * 1997-02-28 1998-09-08 Tec Corp Ink-jet printer
US6554398B2 (en) * 2001-03-08 2003-04-29 Agfa-Gevaert Ink-jet printer equipped for aligning the printheads
US7270387B2 (en) * 2004-01-30 2007-09-18 Konica Minolta Holdings Inc. Recording head position adjusting structure and inkjet printer provided with said adjusting structure
KR100863244B1 (en) * 2004-10-07 2008-10-15 삼성전자주식회사 An inkjet head mount and an inkjet printing apparatus having the same.
CN101456302B (en) 2007-12-10 2011-06-22 旭丽电子(广州)有限公司 Print head fine adjustment mechanism
ES2370632B1 (en) * 2010-02-09 2012-11-06 Tkt Brainpower S.L. SYSTEM OF ADJUSTMENT OF THE BASE OF THE PRINTING HEAD OF A DRAWING MACHINE.
DE102010060412B4 (en) * 2010-11-08 2017-10-26 Océ Printing Systems GmbH & Co. KG Device for mechanical adjustment of a printhead in an inkjet printing device
GB2528843B (en) * 2014-07-30 2020-06-03 Inca Digital Printers Ltd Printhead attachment system

Non-Patent Citations (1)

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Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023107319B3 (en) 2023-03-23 2024-02-15 Heidelberger Druckmaschinen Aktiengesellschaft Device for adjusting a print head
DE102024104484A1 (en) 2023-03-23 2024-09-26 Heidelberger Druckmaschinen Aktiengesellschaft Printing unit of an inkjet printing machine
US12138939B2 (en) 2023-03-23 2024-11-12 Heidelberger Druckmaschinen Ag Device for adjusting a printing head

Also Published As

Publication number Publication date
CN110154529B (en) 2020-11-03
EP3527390A1 (en) 2019-08-21
JP3221875U (en) 2019-06-27
CN110154529A (en) 2019-08-23

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