EP2409923A2 - Clamping device - Google Patents

Clamping device Download PDF

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Publication number
EP2409923A2
EP2409923A2 EP11164191A EP11164191A EP2409923A2 EP 2409923 A2 EP2409923 A2 EP 2409923A2 EP 11164191 A EP11164191 A EP 11164191A EP 11164191 A EP11164191 A EP 11164191A EP 2409923 A2 EP2409923 A2 EP 2409923A2
Authority
EP
European Patent Office
Prior art keywords
carrier
clamping
clamping device
spring
roller
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
EP11164191A
Other languages
German (de)
French (fr)
Other versions
EP2409923B1 (en
EP2409923A3 (en
Inventor
Dieter Hafner
Stephan Rattenberger
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.)
Krones AG
Original Assignee
Krones AG
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Filing date
Publication date
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Publication of EP2409923A2 publication Critical patent/EP2409923A2/en
Publication of EP2409923A3 publication Critical patent/EP2409923A3/en
Application granted granted Critical
Publication of EP2409923B1 publication Critical patent/EP2409923B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/08—Label feeding
    • B65C9/18—Label feeding from strips, e.g. from rolls
    • B65C9/1803—Label feeding from strips, e.g. from rolls the labels being cut from a strip
    • B65C9/183—Label feeding from strips, e.g. from rolls the labels being cut from a strip and transferred by gripping means or feeding rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65C—LABELLING OR TAGGING MACHINES, APPARATUS, OR PROCESSES
    • B65C9/00—Details of labelling machines or apparatus
    • B65C9/26—Devices for applying labels
    • B65C9/30—Rollers
    • B65C9/32—Cooperating rollers between which articles and labels are fed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/75—Labelling machines

Definitions

  • the invention relates to a clamping device for releasably pressing a pressure roller to a conveyor roller, in particular for a labeling machine.
  • Labeling machines such as the DE 20 2005 002 793 U1 can be seen, use a roller pair of a conveyor roller and a pressure roller, between which a strip or sheet-shaped label, for example, a cutting device or an applicator is supplied.
  • the pressure roller is movable in the direction of the conveyor roller to and from her, on the one hand to allow threading the labels between the two rollers and on the other hand to press the labels with sufficient delivery pressure against the driven conveyor roller to ensure a slip-free conveying of the labels.
  • the label tape wound around the feed roller and thus the diameter of the roller is rapidly increasing, which either the contact pressure increases rapidly or the machine clogged.
  • Another problem with these known roller pairings is the fact that a label change requires a relatively high amount of time and extra care.
  • the invention has for its object to provide a clamping device that allows dodging of the pressure roller and a quick change of the label.
  • the object is achieved by the clamping device of claim 1.
  • the pressing force of the pressure roller is applied by a spring element which acts radially to the pressure roller, so that the pressure roller can escape with a label jam between the pressure roller and conveyor roller against the spring element.
  • the radially acting spring element further allows a particularly simple quick-release element, with the simple action of the tensioning element, the spring action can be canceled, so that the labels can be very easily, quickly and easily threaded between the pressure roller and conveyor roller.
  • the carrier is designed in a structurally simple manner as slidable carriage in a carriage guide, whereby a fast response to the desired states of motion is secured.
  • the spring element preferably comprises one or a plurality of compression springs, which acts on an attack surface directly on the carrier or attack. But this can also be another spring element, such. be a gas spring or a gas spring assembly.
  • the clamping element preferably engages on a surface opposite the spring engagement surface on the carrier.
  • a clamping element provided with a non-axially symmetrical cross-section is particularly suitable as a quick-clamping device, since only a rotation about the longitudinal axis of the clamping element is necessary for changing the positions.
  • the tensioning element is guided by a slot in the carrier in such a way that the carrier can move relative to the tensioning element, for an evasive movement with accumulation of labels.
  • the clamping engagement surface preferably has a projection which overlaps with the rotational circle of the non-axisymmetric cross section of the clamping element, so that the spring action can be canceled even if the carriage has been pushed back by accumulation of labels in the nip.
  • the tensioning and relaxing is achieved by two positions of the clamping element.
  • a particularly preferred structural design of the carriage and the carriage guide is the C-shape with opposite legs and a web connecting them.
  • Fig. 1 shows a clamping device 1 for a conveyor roller 2, which is intended in the illustrated embodiment for a labeling machine in a filling plant for food and there label bands or already separated labels a cutting device or an applicator or the like. Supplements.
  • the conveyor roller 2 is flying with a vertical axis of rotation 2 ' stored and driven by a drive not shown. There is thus at least at one axial end of the conveyor roller 2 no connection to the clamping device 1, so that the nip between the conveyor roller 2 and the clamping device 1, for example, accessible from above and labels can be easily threaded (see also Fig. 2 ).
  • the clamping device 1 includes a pressure roller 3, which may also be of conventional type, so for example provided with a rubber coating may be.
  • the pressure roller 3 is mounted, via suitable bearings 4 in a carrier 5 in the form of a carriage which is movable in the direction of the double arrow P, in particular slidably received in a guide 6.
  • the axes of rotation 2 'of the conveyor roller 2 and 3' of the pressure roller 3 are parallel to each other and substantially perpendicular.
  • the carrier 5 preferably has a C-shaped longitudinal section with a lower and an upper leg 5a, 5b and a substantially vertical web 5c connecting them.
  • the pressure roller 3 is rotatably mounted in the opposite legs 5a, 5b.
  • the guide 6 has a substantially C-shaped longitudinal section, which surrounds the carrier 5.
  • the legs 6a and 6b of the guide 6 form inwardly facing sliding surfaces for the carrier. 5
  • the spring element 7 comprises at least one compression or tension spring, preferably a plurality of compression coil springs 7a, which are centered in recesses 8 in the web 6c and, preferably by screws 9, can be prestressed.
  • the spring element 7 could e.g. be a gas spring and acts on a spring engaging surface 10 on the web 6c facing the outside of the web 5c of the carrier 5 and presses the carrier 5 with the pressure roller 3 mounted therein with a predetermined pressing force against the conveying roller 2.
  • a gap S Between the spring engaging surface 10 and the opposite Surface of the web 6c of the guide 6 is a gap S, which allows a retreat of the carrier 5 of the conveyor roller 2, if between the pressure roller 3 and the conveyor roller 2 labels should accumulate.
  • the clamping device 1 further includes a clamping element 11, which is provided with a handle 12 and designed for manual movement of the carrier 5 to cancel the action of the spring element 7 for pressing the pressure roller 3 to the conveyor roller 2 and in a second position to allow this ,
  • the clamping element 11 has a non-axisymmetric cross section with a radially extending recess 11 c and is preferably formed as a shaft with a semicircular cross section.
  • the clamping element 11 is with bearing pin 11 a and 11 b and vertical axis 11 'in the legs 6 a and 6b of the guide 6 rotatably mounted in the direction of arrow D.
  • the axis of rotation 11 ' runs parallel to the axes of rotation 2' and 3 '.
  • the elongated holes 13a, 13b are arranged as close as possible to the web 5c of the carrier 5, preferably ending directly on the web 5c, so that the Web 5 c form a stop for the corresponding bearing pin 11 a, 11 b of the clamping element 11 to limit the maximum movement of the pressure roller 3 against the conveyor roller 2.
  • the slots 13a and 13b are longer in the direction of the double arrow P as it corresponds to the diameter of reaching through the slots bearing pin 11 a, 11 b of the clamping element 11, so that the carrier 5 can move in the direction of the double arrow P relative to the clamping element 11 ,
  • a projection 14 which projects into the region of the recess 11 c of the clamping element 11, i. in the rotational circle of the non-axisymmetric cross section of the clamping element. If now the clamping element 11 is rotated in the direction of the double arrow P, the cross-sectional part of the non-axisymmetric cross section of the clamping element 11 engages the projection 14 and pushes the carrier 5 with compression of the spring element 7 in the direction of the web 6c. This opens the nip between the two rollers 2 and 3 for removing multiple labels or for threading a new label tape.
  • the clamping element 11 is again rotated into a position in which it is the spring element 7 is allowed to load the carrier 5 again with the predetermined by the spring element 7 pressing force of the pressure roller 3 to the conveyor roller 2.
  • the clamping element 11 is again rotated into a position in which it is the spring element 7 is allowed to load the carrier 5 again with the predetermined by the spring element 7 pressing force of the pressure roller 3 to the conveyor roller 2.
  • the clamping element can also be provided with a cam or the like.
  • coil springs other springs can be used.
  • the carrier and its guide may have other longitudinal sections.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Labeling Devices (AREA)

Abstract

The clamping device (1) comprises a pressure roller (3), which is mounted in a movable carrier (5) that has a spring contact surface (10), and a clamping element (11), which is provided movable in two positions. The carrier is designed as a slide, which is movably mounted in a guide (6) radial to a conveyor roller (2).

Description

Die Erfindung bezieht sich auf eine Spannvorrichtung zum lösbaren Andrücken einer Andrückwalze an eine Förderwalze, insbesondere für eine Etikettiermaschine.The invention relates to a clamping device for releasably pressing a pressure roller to a conveyor roller, in particular for a labeling machine.

Etikettiermaschinen, wie sie beispielsweise der DE 20 2005 002 793 U1 zu entnehmen sind, verwenden ein Walzenpaar aus einer Förderwalze und einer Andrückwalze, zwischen denen ein Streifen- oder blattförmiges Etikett beispielsweise einer Schneideinrichtung oder einer Aufbringeinrichtung zugeführt wird. Die Andrückwalze ist in Richtung auf die Förderwalze zu und von ihr weg bewegbar, um einerseits ein Einfädeln der Etiketten zwischen die beiden Walzen zu gestatten und andererseits die Etiketten mit ausreichendem Förderdruck gegen die angetriebene Förderwalze zu pressen, um ein schlupffreies Fördern der Etiketten zu gewährleisten. Trotz aller Vorsicht kann es jedoch passieren, dass sich das Etikettenband um die Förderwalze wickelt und somit der Durchmesser der Walze rapide größer wird, wodurch entweder der Anpressdruck rapide ansteigt oder die Maschine verstopft. Ein weiteres Problem bei diesen bekannten Walzenpaarungen ist die Tatsache, dass ein Etikettenwechsel einen relativ hohen Zeitaufwand und besondere Umsicht erfordert.Labeling machines, such as the DE 20 2005 002 793 U1 can be seen, use a roller pair of a conveyor roller and a pressure roller, between which a strip or sheet-shaped label, for example, a cutting device or an applicator is supplied. The pressure roller is movable in the direction of the conveyor roller to and from her, on the one hand to allow threading the labels between the two rollers and on the other hand to press the labels with sufficient delivery pressure against the driven conveyor roller to ensure a slip-free conveying of the labels. Despite caution, however, it can happen that the label tape wound around the feed roller and thus the diameter of the roller is rapidly increasing, which either the contact pressure increases rapidly or the machine clogged. Another problem with these known roller pairings is the fact that a label change requires a relatively high amount of time and extra care.

Der Erfindung liegt die Aufgabe zugrunde, eine Spanneinrichtung bereitzustellen, die ein Ausweichen der Andrückwalze und ein schnelles Wechseln des Etikettes gestattet.The invention has for its object to provide a clamping device that allows dodging of the pressure roller and a quick change of the label.

Die Aufgabe wird durch die Spannvorrichtung des Anspruchs 1 gelöst.The object is achieved by the clamping device of claim 1.

Durch die erfindungsgemäße Ausgestaltung wird die Andrückkraft der Andrückwalze durch ein Federelement aufgebracht, das radial zur Andrückwalze wirkt, so dass die Andrückwalze bei einem Etikettenstau zwischen Andrückwalze und Förderwalze gegen das Federelement ausweichen kann. Das radial wirkende Federelement erlaubt weiterhin ein besonders einfaches Schnellspann-Element, mit dem durch einfaches Bewegen des Spannelementes die Federwirkung aufgehoben werden kann, so dass die Etiketten sehr einfach, schnell und unkompliziert zwischen Andrückwalze und Förderwalze eingefädelt werden können.Due to the configuration of the invention, the pressing force of the pressure roller is applied by a spring element which acts radially to the pressure roller, so that the pressure roller can escape with a label jam between the pressure roller and conveyor roller against the spring element. The radially acting spring element further allows a particularly simple quick-release element, with the simple action of the tensioning element, the spring action can be canceled, so that the labels can be very easily, quickly and easily threaded between the pressure roller and conveyor roller.

Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.Advantageous developments can be found in the dependent claims.

Der Träger ist auf konstruktiv einfache Weise als in einer Schlittenführung verschiebbarer Schlitten ausgebildet, wodurch ein schnelles Ansprechen auf die gewünschten Bewegungszustände gesichert ist.The carrier is designed in a structurally simple manner as slidable carriage in a carriage guide, whereby a fast response to the desired states of motion is secured.

Das Federelement umfasst vorzugsweise eine oder eine Vielzahl von Druckfedern, die an einer Angriffsfläche direkt am Träger angreift oder angreifen. Dies kann aber auch ein anderes Federelement, wie z.B. eine Gasfeder oder eine Gasfederanordnung sein.The spring element preferably comprises one or a plurality of compression springs, which acts on an attack surface directly on the carrier or attack. But this can also be another spring element, such. be a gas spring or a gas spring assembly.

Um die Federwirkung aufzuheben, greift das Spannelement bevorzugt auf einer der Federangriffsfläche gegenüberliegenden Fläche am Träger an.In order to release the spring effect, the clamping element preferably engages on a surface opposite the spring engagement surface on the carrier.

Ein mit einem nicht axial symmetrischen Querschnitt versehenes Spannelement eignet sich besonders als Schnellspanneinrichtung, da zum Ändern der Stellungen lediglich eine Verdrehung um die Längsachse des Spannelementes notwendig ist.A clamping element provided with a non-axially symmetrical cross-section is particularly suitable as a quick-clamping device, since only a rotation about the longitudinal axis of the clamping element is necessary for changing the positions.

Das Spannelement ist durch ein Langloch im Träger derart geführt, dass sich der Träger relativ zum Spannelement, für eine Ausweichbewegung bei Ansammlung von Etiketten, bewegen kann.The tensioning element is guided by a slot in the carrier in such a way that the carrier can move relative to the tensioning element, for an evasive movement with accumulation of labels.

Die Spannangriffsfläche weist bevorzugt einen Vorsprung auf, der sich mit dem Drehkreis des nicht-axialsymmetrischen Querschnitts des Spannelementes überlappt, so dass die Federeinwirkung auch dann aufgehoben werden kann, wenn der Schlitten durch Ansammlung von Etiketten im Walzenspalt zurückgedrängt wurde.The clamping engagement surface preferably has a projection which overlaps with the rotational circle of the non-axisymmetric cross section of the clamping element, so that the spring action can be canceled even if the carriage has been pushed back by accumulation of labels in the nip.

Bevorzugt wird das Spannen und Entspannen durch zwei Stellungen des Spannelementes erreicht.Preferably, the tensioning and relaxing is achieved by two positions of the clamping element.

Eine besonders bevorzugte konstruktive Ausgestaltung des Schlittens und der Schlittenführung ist die C-Form mit gegenüberliegenden Schenkeln und einem diese verbindenden Steg.A particularly preferred structural design of the carriage and the carriage guide is the C-shape with opposite legs and a web connecting them.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Darstellung einer an einer Förderwalze angeordneten Spanneinrichtung,
Fig. 2
die Draufsicht auf Fig. 1, und
Fig. 3
den Schnitt A ― A aus Fig. 2.
An embodiment of the invention will be explained in more detail with reference to the drawings. Show it:
Fig. 1
a perspective view of a arranged on a conveyor roller clamping device,
Fig. 2
the top view Fig. 1 , and
Fig. 3
the section A - A off Fig. 2 ,

Fig. 1 zeigt eine Spannvorrichtung 1 für eine Förderwalze 2, die im dargestellten Ausführungsbeispiel für eine Etikettiermaschine in einer Abfüllanlage für Lebensmittel gedacht ist und dort Etikettenbänder oder bereits abgetrennte Etiketten einer Schneideinrichtung oder einer Aufbringeinrichtung oder dgl. zuführt. Die Förderwalze 2 ist mit senkrechter Drehachse 2' fliegend gelagert und durch einen nicht gezeichneten Antrieb angetrieben. Es besteht somit zumindest an einem axialen Ende der Förderwalze 2 keine Verbindung zur Spanneinrichtung 1, so dass der Walzenspalt zwischen der Förderwalze 2 und der Spanneinrichtung 1 z.B. von oben zugänglich ist und Etiketten einfach eingefädelt werden können (siehe auch Fig. 2). Fig. 1 shows a clamping device 1 for a conveyor roller 2, which is intended in the illustrated embodiment for a labeling machine in a filling plant for food and there label bands or already separated labels a cutting device or an applicator or the like. Supplements. The conveyor roller 2 is flying with a vertical axis of rotation 2 ' stored and driven by a drive not shown. There is thus at least at one axial end of the conveyor roller 2 no connection to the clamping device 1, so that the nip between the conveyor roller 2 and the clamping device 1, for example, accessible from above and labels can be easily threaded (see also Fig. 2 ).

Die Spanneinrichtung 1 enthält eine Andrückwalze 3, die ebenfalls von üblicher Art, also beispielsweise mit einem Gummibelag versehen, sein kann. Die Andrückwalze 3 ist, über geeignete Lager 4 in einem Träger 5 in Form eines Schlittens gelagert, der in Richtung des Doppelpfeiles P bewegbar, insbesondere verschiebbar, in einer Führung 6 aufgenommen ist. Die Drehachsen 2' der Förderwalze 2 und 3' der Andrückwalze 3 verlaufen parallel zueinander und im Wesentlichen senkrecht.The clamping device 1 includes a pressure roller 3, which may also be of conventional type, so for example provided with a rubber coating may be. The pressure roller 3 is mounted, via suitable bearings 4 in a carrier 5 in the form of a carriage which is movable in the direction of the double arrow P, in particular slidably received in a guide 6. The axes of rotation 2 'of the conveyor roller 2 and 3' of the pressure roller 3 are parallel to each other and substantially perpendicular.

Der Träger 5 hat bevorzugt einen C-förmigen Längsschnitt mit einem unteren und einem oberen Schenkel 5a, 5b und einem diese verbindenden, im Wesentlichen senkrechten Steg 5c. In den sich gegenüberliegenden Schenkeln 5a, 5b ist die Andrückrolle 3 drehbar gelagert.The carrier 5 preferably has a C-shaped longitudinal section with a lower and an upper leg 5a, 5b and a substantially vertical web 5c connecting them. In the opposite legs 5a, 5b, the pressure roller 3 is rotatably mounted.

Auch die Führung 6 hat einen im Wesentlichen C-förmigen Längsschnitt, der den Träger 5 umgreift. Die Schenkel 6a und 6b der Führung 6 bilden nach innen weisende Gleitflächen für den Träger 5.The guide 6 has a substantially C-shaped longitudinal section, which surrounds the carrier 5. The legs 6a and 6b of the guide 6 form inwardly facing sliding surfaces for the carrier. 5

Am Steg 6c der Führung 6 stützt sich ein Federelement 7 ab. Das Federelement 7 umfasst wenigstens eine Druck- oder Zugfeder, bevorzugt eine Vielzahl von Druckschraubenfedern 7a, die in Ausnehmungen 8 im Steg 6c zentriert und, bevorzugt durch Schrauben 9, vorspannbar sind. Das Federelement 7 könnte z.B. eine Gasfeder sein und wirkt auf eine Federangriffsfläche 10 an der dem Steg 6c zugewandten Außenseite des Steges 5c des Trägers 5 ein und drückt den Träger 5 mit der darin gelagerten Andrückwalze 3 mit einer vorbestimmten Andrückkraft gegen die Förderwalze 2. Zwischen der Federangriffsfläche 10 und der gegenüberliegenden Fläche des Steges 6c der Führung 6 befindet sich ein Spalt S, der ein Zurückweichen des Trägers 5 von der Förderwalze 2 gestattet, wenn sich zwischen der Andrückwalze 3 und der Förderwalze 2 Etiketten ansammeln sollten.At the web 6c of the guide 6, a spring element 7 is supported. The spring element 7 comprises at least one compression or tension spring, preferably a plurality of compression coil springs 7a, which are centered in recesses 8 in the web 6c and, preferably by screws 9, can be prestressed. The spring element 7 could e.g. be a gas spring and acts on a spring engaging surface 10 on the web 6c facing the outside of the web 5c of the carrier 5 and presses the carrier 5 with the pressure roller 3 mounted therein with a predetermined pressing force against the conveying roller 2. Between the spring engaging surface 10 and the opposite Surface of the web 6c of the guide 6 is a gap S, which allows a retreat of the carrier 5 of the conveyor roller 2, if between the pressure roller 3 and the conveyor roller 2 labels should accumulate.

Die Spannvorrichtung 1 enthält weiterhin ein Spannelement 11, das mit einem Handgriff 12 versehen und für eine manuelle Bewegung des Trägers 5 ausgelegt ist, um die Wirkung des Federelementes 7 zum Anpressen der Andrückwalze 3 an die Förderwalze 2 aufzuheben bzw. in einer zweiten Stellung diese zuzulassen. Das Spannelement 11 weist einen nicht-axialsymmetrischen Querschnitt mit einer sich radial erstreckenden Ausnehmung 11 c auf und ist bevorzugt als Welle mit einem halbkreisförmigen Querschnitt ausgebildet. Das Spannelement 11 ist mit Lagerzapfen 11a bzw. 11 b und senkrechter Achse 11' in den Schenkeln 6a bzw. 6b der Führung 6 in Richtung des Pfeiles D drehbar gelagert. Dabei verläuft die Drehachse 11' parallel zu den Drehachsen 2' und 3'.The clamping device 1 further includes a clamping element 11, which is provided with a handle 12 and designed for manual movement of the carrier 5 to cancel the action of the spring element 7 for pressing the pressure roller 3 to the conveyor roller 2 and in a second position to allow this , The clamping element 11 has a non-axisymmetric cross section with a radially extending recess 11 c and is preferably formed as a shaft with a semicircular cross section. The clamping element 11 is with bearing pin 11 a and 11 b and vertical axis 11 'in the legs 6 a and 6b of the guide 6 rotatably mounted in the direction of arrow D. The axis of rotation 11 'runs parallel to the axes of rotation 2' and 3 '.

Das Spannelement 11 erstreckt sich durch jeweils ein Langloch 13a, 13b in den Schenkeln 5a bzw. 5b des Trägers 5. Diese Langlöcher 13a, 13b sind möglichst nahe am Steg 5c des Trägers 5 angeordnet, bevorzugt enden sie direkt am Steg 5c, so dass der Steg 5c einen Anschlag für die entsprechenden Lagerzapfen 11 a, 11 b des Spannelementes 11 zur Begrenzung der Maximalbewegung der Andrückwalze 3 gegen die Förderwalze 2 bilden. Die Langlöcher 13a und 13b sind jedoch in Richtung des Doppelpfeiles P länger als es dem Durchmesser der durch die Langlöcher reichenden Lagerzapfen 11 a, 11 b des Spannelementes 11 entspricht, so dass sich der Träger 5 in Richtung des Doppelpfeiles P relativ zum Spannelement 11 verschieben kann.The elongated holes 13a, 13b are arranged as close as possible to the web 5c of the carrier 5, preferably ending directly on the web 5c, so that the Web 5 c form a stop for the corresponding bearing pin 11 a, 11 b of the clamping element 11 to limit the maximum movement of the pressure roller 3 against the conveyor roller 2. However, the slots 13a and 13b are longer in the direction of the double arrow P as it corresponds to the diameter of reaching through the slots bearing pin 11 a, 11 b of the clamping element 11, so that the carrier 5 can move in the direction of the double arrow P relative to the clamping element 11 ,

An der der Federangriffsfläche 10 gegenüberliegenden Fläche des Steges 5c befindet sich ein Vorsprung 14, der in den Bereich der Ausnehmung 11 c des Spannelementes 11 hineinragt, d.h. im Drehkreis des nicht-axialsymmetrischen Querschnitts des Spannelementes liegt. Wird nun das Spannelement 11 in Richtung des Doppelpfeiles P verdreht, so greift der Querschnittsteil des nicht-axialsymmetrischen Querschnitts des Spannelementes 11 am Vorsprung 14 an und drückt den Träger 5 unter Komprimierung des Federelementes 7 in Richtung auf den Steg 6c. Dadurch öffnet sich der Walzenspalt zwischen den beiden Walzen 2 und 3 zum Entfernen von Mehrfachetiketten oder zum Einfädeln eines neuen Etikettenbandes. Anschließend wird das Spannelement 11 wieder in eine Stellung verdreht, in der es dem Federelement 7 gestattet ist, den Träger 5 wieder mit der durch das Federelement 7 vorbestimmten Andrückkraft der Andrückwalze 3 an die Förderwalze 2 zu belasten. Bei Belastung der Andrückwalze 3 durch die vorbestimmte Andrückkraft berührt der Träger 5 das Spannelement 11 nicht.At the spring engaging surface 10 opposite surface of the web 5c is a projection 14 which projects into the region of the recess 11 c of the clamping element 11, i. in the rotational circle of the non-axisymmetric cross section of the clamping element. If now the clamping element 11 is rotated in the direction of the double arrow P, the cross-sectional part of the non-axisymmetric cross section of the clamping element 11 engages the projection 14 and pushes the carrier 5 with compression of the spring element 7 in the direction of the web 6c. This opens the nip between the two rollers 2 and 3 for removing multiple labels or for threading a new label tape. Subsequently, the clamping element 11 is again rotated into a position in which it is the spring element 7 is allowed to load the carrier 5 again with the predetermined by the spring element 7 pressing force of the pressure roller 3 to the conveyor roller 2. When loading the pressure roller 3 by the predetermined pressing force of the carrier 5 does not touch the clamping element 11.

In Abwandlung des beschriebenen und gezeichneten Ausführungsbeispiels kann das Spannelement auch mit einem Nocken oder dgl. versehen sein. Statt Schraubenfedern können andere Federn Verwendung finden. Auch der Träger und seine Führung können andere Längsschnitte aufweisen.In a modification of the described and illustrated embodiment, the clamping element can also be provided with a cam or the like. Instead of coil springs other springs can be used. Also, the carrier and its guide may have other longitudinal sections.

Claims (11)

Spannvorrichtung (1) zum lösbaren Andrücken einer Andrückwalze (3) an eine Förderwalze (2), insbesondere für eine Etikettiermaschine, wobei die Andrückwalze (3) in einem bewegbaren Träger (5) gelagert ist, der eine Federangriffsfläche (10) aufweist, die durch ein Federelement (7) mit der radial zur Förderwalze (2) wirkenden Andrückkraft beaufschlagt ist, und dass ein in wenigstens zwei Stellungen bewegbares Spannelement (11) vorgesehen ist, das in der ersten Stellung die Andrückkraft auf die Förderwalze (2) aufhebt und in der zweiten Stellung zulässt.Clamping device (1) for releasably pressing a pressure roller (3) on a conveyor roller (2), in particular for a labeling machine, wherein the pressure roller (3) is mounted in a movable carrier (5) having a spring engagement surface (10) passing through a spring element (7) is acted upon by the pressing force acting radially to the conveying roller (2), and that a clamping element (11) which is movable in at least two positions is provided, which in the first position releases the pressing force on the conveying roller (2) and in which second position permits. Spannvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Träger (5) als Schlitten ausgebildet ist, der radial zur Förderwalze (2) bewegbar in einer Führung (6) gelagert ist.Clamping device according to claim 1, characterized in that the carrier (5) is designed as a carriage which is mounted radially to the conveyor roller (2) movable in a guide (6). Spannvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Federelement (7) wenigstens eine Druck- oder Zugfeder umfasst.Clamping device according to claim 1 or 2, characterized in that the spring element (7) comprises at least one compression or tension spring. Spannvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Federelement (7) zwischen der Führung (6) und dem Träger (5) angeordnet ist.Clamping device according to one of claims 1 to 3, characterized in that the spring element (7) between the guide (6) and the carrier (5) is arranged. Spannvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Spannelement (11) auf eine der Federangriffsfläche (10) entgegengesetzte Spannangriffsfläche (14) des Trägers (5) einwirkt.Clamping device according to one of claims 1 to 4, characterized in that the clamping element (11) on one of the spring engagement surface (10) opposite clamping engagement surface (14) of the carrier (5) acts. Spannvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Spannelement (11) einen nicht-axialsymmetrischen Querschnitt aufweist und drehbar gelagert ist.Clamping device according to one of claims 1 to 5, characterized in that the clamping element (11) has a non-axisymmetric cross-section and is rotatably mounted. Spannvorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Spannelement (11) als Spannwelle mit halbrundem Querschnitt ausgebildet ist.Clamping device according to claim 6, characterized in that the clamping element (11) is designed as a clamping shaft with semicircular cross-section. Spannvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Spannelement (11) außerhalb des Trägers (5) gelagert ist und in einem Langloch (13a, 13b) im Träger (5) aufgenommen ist.Clamping device according to one of claims 1 to 7, characterized in that the clamping element (11) outside the carrier (5) is mounted and in a slot (13a, 13b) is received in the carrier (5). Spannvorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Spannangriffsfläche einen Vorsprung (14) aufweist, der in Richtung auf das Spannelement (11) vorsteht und sich mit dem Drehkreis des nicht-axialsymmetrischen Querschnitts überlappt.Clamping device according to one of claims 5 to 8, characterized in that the clamping engagement surface has a projection (14) which projects in the direction of the clamping element (11) and overlaps with the rotational circle of the non-axisymmetric cross section. Spannvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass in einer ersten Drehstellung des Spannelementes (11) das Federelement (7) den Träger (5) mit der Andrückwalze (3) gegen die Förderwalze (2) drückt und in einer zweiten Stellung das Spannelement (11) den Träger (5) gegen das Federelement (7) drückt und dadurch die Andrückwalze (3) von der Förderwalze (2) wegbewegt.Clamping device according to one of claims 1 to 9, characterized in that in a first rotational position of the clamping element (11) the spring element (7) presses the carrier (5) with the pressure roller (3) against the conveyor roller (2) and in a second position the tensioning element (11) presses the carrier (5) against the spring element (7) and thereby moves the pressure roller (3) away from the conveying roller (2). Spannvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Träger (5) im Längsschnitt C-förmig mit zwei gegenüberliegenden Schenkeln (5a, 5b) und einem sie verbindenden Steg (5c) ausgebildet ist und in einer ebenfalls im Längsschnitt C-förmig mit zwei gegenüberliegenden Schenkeln (6a, 6b) und einem sie verbindenden Steg (6c) ausgebildeten Führung (6) aufgenommen ist, wobei das Federelement (7) zwischen den Stegen (5c, 6c) von Träger (5) und Führung (6) wirkt, wobei das Spannelement (11) in wenigstens einem Schenkel (6a, 6b) der Führung (6) drehbar gelagert ist, sich durch ein Langloch (13a, 13b) im Schenkel (5a, 5b) des Trägers (5) erstreckt und auf den Steg (5c) des Trägers (5), an der dem Federelement (7) gegenüberliegenden Seite wirkt und die Andrückwalze (3) an der dem Steg (5c) gegenüberliegenden Seite des Spannelementes (11) in den Schenkeln (5a, 5b) des Träges (5) gelagert ist.Clamping device according to one of claims 1 to 10, characterized in that the carrier (5) in a longitudinal section C-shaped with two opposite legs (5a, 5b) and a connecting web (5c) is formed and in a likewise in longitudinal section C-. shaped with two opposite legs (6a, 6b) and a connecting web (6c) formed guide (6) is received, wherein the spring element (7) between the webs (5c, 6c) of the carrier (5) and guide (6) acts, wherein the clamping element (11) in at least one leg (6a, 6b) of the guide (6) is rotatably mounted, through a slot (13a, 13b) in the legs (5a, 5b) of the support (5) and extends the web (5c) of the carrier (5), acts on the spring element (7) opposite side and the pressure roller (3) on the web (5c) opposite side of the clamping element (11) in the legs (5a, 5b) of the Support (5) is stored.
EP20110164191 2010-07-22 2011-04-28 Clamping device Active EP2409923B1 (en)

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DE102010038293A DE102010038293A1 (en) 2010-07-22 2010-07-22 jig

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Also Published As

Publication number Publication date
EP2409923B1 (en) 2014-06-04
CN102431690A (en) 2012-05-02
DE102010038293A1 (en) 2012-01-26
EP2409923A3 (en) 2013-04-03
CN102431690B (en) 2014-05-28

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