EP2620262B1 - Coupling assembly for a safety shutdown - Google Patents

Coupling assembly for a safety shutdown Download PDF

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Publication number
EP2620262B1
EP2620262B1 EP20130405005 EP13405005A EP2620262B1 EP 2620262 B1 EP2620262 B1 EP 2620262B1 EP 20130405005 EP20130405005 EP 20130405005 EP 13405005 A EP13405005 A EP 13405005A EP 2620262 B1 EP2620262 B1 EP 2620262B1
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EP
European Patent Office
Prior art keywords
drive shaft
lever
handle
coupling assembly
housing
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EP20130405005
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German (de)
French (fr)
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EP2620262A1 (en
Inventor
Francesco Sanfratello
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SUHNER INTERTRADE AG
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SUHNER INTERTRADE AG
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Publication of EP2620262A1 publication Critical patent/EP2620262A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B25/00—Hand cutting tools involving disc blades, e.g. motor-driven
    • B26B25/002—Motor-driven knives with a rotating annular blade

Definitions

  • the invention relates to a coupling arrangement for a safety shutdown according to the preamble of patent claim 1.
  • Circular knives are used in meat processing for boning, cutting and serging meat pieces from fat and tendons.
  • Such a knife is for example from the DE 600 32 648 D2 known.
  • Knives of this type are exposed to a relatively high wear, on the one hand, the edge of the circular blade during use is dull and must be reground and on the other hand, the knife must be cleaned very clean at the end of work for hygiene reasons.
  • the blade guide ring is removed from the handle.
  • the handle To be able to do this off the job site, the handle must be previously separated with the drive gear for the knife from the front end of an electrically driven flexible drive shaft. Both the blade change and the removal of the guide ring with the handle of the drive shaft is relatively often and should therefore be possible without great expenditure of time, without risk of injury through the knife and without the use of tools.
  • the device In addition to the ease of use on the one hand when changing blades and on the other hand when removing the handle with the guide ring, the device must be very safe to handle, to avoid serious injury from the sharp, rotating at high speed blade. This is achieved in that the knife can only be rotated when the operator presses a lever against the handle or the housing of the handle and thereby connects the knife with the drive shaft only. Once the lever is released, for example, when the operator's knife falls out of the hand or when it no longer tightly encloses the handle for other reasons to interrupt the work, the connection between the rotating blade and the drive shaft is released and thus the drive train interrupted.
  • An object of the present invention is to provide a clutch assembly for a safety shutdown on a drivable by a flexible drive shaft circular blade, which has a simple structure and thus high reliability and which with the existing actuators for the powertrain interruption and the separation of the device from the drive side End of the drive shaft allows.
  • the reference numeral 3 denotes a handle 3, which simultaneously forms a housing 5, on which a head piece 7 of a knife guide ring 8 is attached.
  • the knife guide ring 8 and the knife 10 are attached to the head piece 7.
  • the front end 9 of a flexible drive shaft 11 is visible.
  • the front end 9 is inserted in the tubular interior of the housing 5.
  • a lever 13 is further pivotally mounted about a pivot pin 15.
  • the lever 13 is for example as two-armed lever is formed, wherein at its shorter leg 17, a spring 19 engages the lever 13 when it is not pressed with a force F in the direction of the arrows T + or T- ( FIGS. 1 and 2 ), in a running from the housing 5 at an acute angle unlocking position FIG. 2 swings.
  • the flexible drive shaft 11 is connected to the rear end 21 of a transmission for driving the circular blade 10, that is in engagement.
  • a locking sleeve 23 On the end 9 of the drive shaft 11 is a locking sleeve 23 with a first to the axis of the drive shaft 11 inclined holding surface 25 and a second, perpendicular to the axis of the drive shaft 11 stationary support surface 27 visible.
  • the locking sleeve 23 is secured by a pin 29 against rotation with respect to the jacket 31 of the drive shaft 11.
  • a sleeve 33 On the left side of the locking sleeve 23 is a sleeve 33, in which the string 35 of the drive shaft 11 is rotatably mounted, visible.
  • a coil spring 37 is attached, whose rear end is supported on a collar 39 of the sleeve 33.
  • the front end of the spring 37 is exposed when the drive shaft 31 is removed from the handle 3.
  • a coupling piece 41 inserted and is located on the front flange 43 on the sleeve 33 at.
  • a first bore section 45 has a larger diameter D than the second bore section 47 with diameter d.
  • the second bore portion 47 sits at the front end of a centering tube 49 with a circular cross-section and is frontally connected to a third bore portion 51 of even smaller diameter.
  • the housing 5 thus comprises three consecutively arranged, stepped bore sections 45, 47 and 51.
  • a polygonal hole 53 is formed, in which the front end 55 of the coupling piece 41 is held against rotation when the drive shaft 11th is fully inserted into the handle (position as in FIG. 1 shown). In this position, a tab 57 engages the lever 13 in the first holding surface 25 and is located there with the inclined edge.
  • the lever 13 is slightly pivoted counterclockwise by the biasing force of the spring 19 (arrow T-).
  • the tab 57 on the lever 13 is released from the first holding surface 25.
  • the force of the spring 37 now displaces the drive shaft 11 to the right until the second holding surface 27 bears against the retaining section 59 of the lever 13.
  • An integrated damping element 61 such as an O-ring, prevents and dampens too violent impact of the tab 59 on the second support surface 27.
  • the displacement of the drive shaft 11 in the handle 3 causes the coupling piece 41 and its front, a hexagonal cross-section end having , slides out of the polygonal hole 53 and thereby the drive train between the further driven drive shaft 11 and the circular blade 10 is interrupted.
  • the drive shaft 11 remains - but held securely held - within the handle 3 (situation in FIG. 2 ).
  • the latter can be removed for cleaning, maintenance and / or blade replacement - free of all drive elements - ( FIG. 5 ).
  • connection of the drive shaft 11 to the handle 3 is in reverse order, i. the drive shaft 11 is inserted from the right into the housing 5 of the handle 3 and engages successively on the retaining portion 59 and then on the tab 57 on the lever 13, whereby the device is brought back into operating condition.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Harvester Elements (AREA)

Description

Gegenstand der Erfindung ist eine Kupplungsanordnung für eine Sicherheitsabschaltung gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a coupling arrangement for a safety shutdown according to the preamble of patent claim 1.

Rundmesser werden in der Fleischverarbeitung zum Ausbeinen, Auftrennen und zum Versäubern von Fleischstücken von Fett und Sehnen eingesetzt. Ein solches Messer ist beispielsweise aus der DE 600 32 648 D2 bekannt.Circular knives are used in meat processing for boning, cutting and serging meat pieces from fat and tendons. Such a knife is for example from the DE 600 32 648 D2 known.

Messer dieser Gattung sind einem verhältnismässig hohen Verschleiss ausgesetzt, da einerseits die Schneide des Rundmessers während des Gebrauchs stumpf wird und nachgeschliffen werden muss und andererseits muss aus Hygienegründen das Messer jeweils bei Arbeitsende sehr sauber gereinigt werden. Um die Reinigung vornehmen zu können und auch aus Sicherheitsgründen beim Messerwechsel wird der Messerführungsring vom Handgriff abgenommen. Um dies auch abseits des Einsatzortes tun zu können, muss vorgängig auch der Handgriff mit dem Antriebsgetriebe für das Messer vom vorderen Ende einer elektrisch angetriebenen flexiblen Antriebswelle getrennt werden. Sowohl der Messerwechsel als auch das Abnehmen des Führungsrings mit dem Handgriff von der Antriebswelle erfolgt verhältnismässig oft und sollte daher möglichst ohne grossen Zeitaufwand, ohne Verletzungsgefahr durch das Messer und ohne Einsatz von Werkzeugen erfolgen können. Nebst der einfachen Handhabung einerseits beim Messerwechsel und anderseits beim Abnehmen des Handgriffs mit dem Führungsring muss die Vorrichtung in der Handhabung sehr sicher sein, um schwere Verletzungen durch das scharfe, mit hoher Drehzahl rotierende Messer zu vermeiden. Dies wird dadurch gelöst, dass das Messer nur in Drehung versetzt werden kann, wenn die Bedienungsperson einen Hebel gegen den Handgriff bzw. das Gehäuse des Handgriffs drückt und dadurch das Messer mit der Antriebswelle erst verbindet. Sobald der Hebel losgelassen wird, beispielsweise wenn das Messer der Bedienungsperson aus der Hand fällt oder wenn diese aus anderen Gründen den Handgriff nicht mehr fest umschliesst, um die Arbeit zu unterbrechen, wird die Verbindung zwischen dem rotierenden Messer und der Antriebswelle gelöst und damit der Antriebsstrang unterbrochen.Knives of this type are exposed to a relatively high wear, on the one hand, the edge of the circular blade during use is dull and must be reground and on the other hand, the knife must be cleaned very clean at the end of work for hygiene reasons. In order to carry out the cleaning and also for safety reasons when changing blades, the blade guide ring is removed from the handle. To be able to do this off the job site, the handle must be previously separated with the drive gear for the knife from the front end of an electrically driven flexible drive shaft. Both the blade change and the removal of the guide ring with the handle of the drive shaft is relatively often and should therefore be possible without great expenditure of time, without risk of injury through the knife and without the use of tools. In addition to the ease of use on the one hand when changing blades and on the other hand when removing the handle with the guide ring, the device must be very safe to handle, to avoid serious injury from the sharp, rotating at high speed blade. This is achieved in that the knife can only be rotated when the operator presses a lever against the handle or the housing of the handle and thereby connects the knife with the drive shaft only. Once the lever is released, for example, when the operator's knife falls out of the hand or when it no longer tightly encloses the handle for other reasons to interrupt the work, the connection between the rotating blade and the drive shaft is released and thus the drive train interrupted.

Aus der deutschen Patentschrift 600 32 648 T2 ist eine solche Kupplungsanordnung für eine Sicherheitsabschaltung bekannt. Die Aufgabe, eine Sicherheitsabschaltung zu gewährleisten, wird durch die oben beschriebene Vorrichtung gelöst. Nachteilig daran ist allerdings, dass diese einen verhältnismässig komplizierten Aufbau aufweist und dass das Lösen des Handgriffs vom Ende der flexiblen Antriebswelle durch ein weiteres, von der Sicherheitsvorrichtung unabhängiges Verriegelungselement zu erfolgen hat.From the German patent 600 32 648 T2 Such a clutch arrangement for a safety shutdown is known. The task of ensuring a safety shutdown is achieved by the device described above. The disadvantage of this, however, is that this has a relatively complicated structure and that the release of the handle from the end of the flexible drive shaft has to be done by another, independent of the safety device locking element.

Eine Aufgabe der vorliegenden Erfindung besteht nun darin, eine Kupplungsanordnung für eine Sicherheitsabschaltung an einem durch eine flexible Antriebswelle antreibbaren Rundmesser zu schaffen, welche einen einfachen Aufbau und damit hohe Funktionssicherheit aufweist und welche mit den vorhandenen Betätigungselementen für die Antriebsstrangunterbrechung auch das Trennen der Vorrichtung vom antriebsseitigen Ende der Antriebswelle ermöglicht.An object of the present invention is to provide a clutch assembly for a safety shutdown on a drivable by a flexible drive shaft circular blade, which has a simple structure and thus high reliability and which with the existing actuators for the powertrain interruption and the separation of the device from the drive side End of the drive shaft allows.

Gelöst wird diese Aufgabe durch eine Kupplungsanordnung gemäss den Merkmalen des Patentanspruchs 1. Vorteilhafte Ausgestaltungen der Kupplungsanordnung sind in den abhängigen Ansprüchen definiert.This object is achieved by a coupling arrangement according to the features of claim 1. Advantageous embodiments of the coupling arrangement are defined in the dependent claims.

Anhand eines illustrierten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:

Figur 1
einen Längsschnitt durch das Gehäuse eines Handgriffs, Kupplung in Arbeitsstellung,
Figur 2
einen Längsschnitt durch das Gehäuse eines Handgriffs, Antriebswelle vom Getriebe des Messers abgekuppelt,
Figur 3
einen Längsschnitt durch das Gehäuse eines Handgriffs, Betätigungshebel zurückgeschwenkt, Antriebswelle kann aus dem Gehäuse herausgezogen werden,
Figur 4
Betätigungshebel in Antriebsposition, jedoch Antriebswelle weiter aus dem Gehäuse ausgezogen und
Figur 5
wie Figur 4, jedoch Antriebswelle vollständig aus dem Ende des Gehäuses ausgezogen.
Reference to an illustrated embodiment, the invention is explained in detail. Show it:
FIG. 1
a longitudinal section through the housing of a handle, coupling in working position,
FIG. 2
a longitudinal section through the housing of a handle, drive shaft uncoupled from the gear of the knife,
FIG. 3
a longitudinal section through the housing of a handle, actuating lever pivoted back, drive shaft can be pulled out of the housing,
FIG. 4
Operating lever in the drive position, but drive shaft further pulled out of the housing and
FIG. 5
as FIG. 4 but the drive shaft is fully extended from the end of the housing.

In den Längsschnitten gemäss den Figuren 1-5 ist mit Bezugszeichen 1 der Griffbereich einer Vorrichtung mit einem Rundmesser dargestellt. Das Bezugszeichen 3 bezeichnet einen Handgriff 3, welcher gleichzeitig ein Gehäuse 5 bildet, an welchem ein Kopfstück 7 eines Messerführungsrings 8 befestigt ist. Der Messerführungsring 8 sowie das Messer 10 sind am Kopfstück 7 befestigt. Auf der rechten Seite der Figuren ist das vordere Ende 9 einer flexiblen Antriebswelle 11 sichtbar. Das vordere Ende 9 steckt im rohrförmig ausgebildeten Innern des Gehäuses 5. An der Unterseite des Gehäuses 5 ist weiter ein Hebel 13 um einen Schwenkbolzen 15 schwenkbar gelagert. Der Hebel 13 ist beispielsweise als zweiarmiger Hebel ausgebildet, wobei an dessen kürzeren Schenkel 17 eine Feder 19 angreift, die den Hebel 13, wenn er nicht mit einer Kraft F in Richtung der Pfeile T+ oder T- gedrückt wird (Figuren 1 und 2), in eine vom Gehäuse 5 im spitzen Winkel verlaufende Entriegelungsstellung gemäss Figur 2 schwenkt.In the longitudinal sections according to the Figures 1-5 1, the gripping area of a device with a circular blade is shown. The reference numeral 3 denotes a handle 3, which simultaneously forms a housing 5, on which a head piece 7 of a knife guide ring 8 is attached. The knife guide ring 8 and the knife 10 are attached to the head piece 7. On the right side of the figures, the front end 9 of a flexible drive shaft 11 is visible. The front end 9 is inserted in the tubular interior of the housing 5. On the underside of the housing 5, a lever 13 is further pivotally mounted about a pivot pin 15. The lever 13 is for example as two-armed lever is formed, wherein at its shorter leg 17, a spring 19 engages the lever 13 when it is not pressed with a force F in the direction of the arrows T + or T- ( FIGS. 1 and 2 ), in a running from the housing 5 at an acute angle unlocking position FIG. 2 swings.

Im Betriebszustand, wie er in Figur 1 dargestellt ist, ist die flexible Antriebswelle 11 mit dem hinteren Ende 21 eines Getriebes für den Antrieb des Rundmessers 10 verbunden, d.h. im Eingriff.In operation, as in FIG. 1 is shown, the flexible drive shaft 11 is connected to the rear end 21 of a transmission for driving the circular blade 10, that is in engagement.

Anhand der Darstellung des vorderen Endes 9 der Antriebswelle 11 werden deren Elemente näher beschrieben (Figur 5). Auf dem Ende 9 der Antriebswelle 11 ist eine Arretierhülse 23 mit einer ersten zur Achse der Antriebswelle 11 geneigten Haltefläche 25 und einer zweiten, rechtwinklig zur Achse der Antriebswelle 11 stehenden Haltefläche 27 sichtbar. Die Arretierhülse 23 ist durch einen Stift 29 gegen Verdrehung bezüglich des Mantels 31 der Antriebswelle 11 gesichert. Auf der linken Seite der Arretierhülse 23 ist eine Hülse 33, in welcher die Saite 35 der Antriebswelle 11 drehbar gelagert ist, sichtbar. Auf der Hülse 33 ist eine Schraubenfeder 37 aufgesteckt, deren hinteres Ende an einem Bund 39 der Hülse 33 abgestützt ist. Das vordere Ende der Feder 37 ist freiliegend, wenn die Antriebswelle 31 vom Handgriff 3 abgenommen ist. In der Hülse 33 ist von der linken Seite her ein Kupplungsstück 41 eingeschoben und liegt am stirnseitigen Flansch 43 an der Hülse 33 an.Based on the representation of the front end 9 of the drive shaft 11 whose elements are described in more detail ( FIG. 5 ). On the end 9 of the drive shaft 11 is a locking sleeve 23 with a first to the axis of the drive shaft 11 inclined holding surface 25 and a second, perpendicular to the axis of the drive shaft 11 stationary support surface 27 visible. The locking sleeve 23 is secured by a pin 29 against rotation with respect to the jacket 31 of the drive shaft 11. On the left side of the locking sleeve 23 is a sleeve 33, in which the string 35 of the drive shaft 11 is rotatably mounted, visible. On the sleeve 33, a coil spring 37 is attached, whose rear end is supported on a collar 39 of the sleeve 33. The front end of the spring 37 is exposed when the drive shaft 31 is removed from the handle 3. In the sleeve 33 is from the left side her a coupling piece 41 inserted and is located on the front flange 43 on the sleeve 33 at.

Das Innere des Handgriffs 3 bzw. des Gehäuses 5 weist folgenden Aufbau auf: Ein erster Bohrungsabschnitt 45 weist einen grösseren Durchmesser D auf als der zweite Bohrungsabschnitt 47 mit Durchmesser d. Im zweiten Bohrungsabschnitt 47 sitzt an dessen vorderen Ende ein Zentrierrohr 49 mit kreisrundem Querschnitt und ist stirnseitig mit einem dritten Bohrungsabschnitt 51 von nochmals kleinerem Durchmesser verbunden. Das Gehäuse 5 umfasst folglich drei hintereinander liegende, stufenförmig angeordnete Bohrungsabschnitte 45, 47 und 51. Am hinteren Ende 21 des Getriebes im Kopfstück 7 ist eine Mehrkantbohrung 53 ausgebildet, in welcher das vordere Ende 55 des Kupplungsstücks 41 drehfest gehalten wird, wenn die Antriebswelle 11 vollständig in den Handgriff eingeschoben ist (Position wie in Figur 1 dargestellt). In dieser Position greift eine Lasche 57 am Hebel 13 in die erste Haltefläche 25 ein und liegt mit deren schräg verlaufenden Kante dort an. Durch die Kraft F auf den Hebel 13 in Richtung T+ wird dadurch das vordere Ende 55 des Kupplungsstücks 41 in der Mehrkantbohrung 53 festgehalten, und zwar gegen die Kraft der Feder 37, die beim Einschieben der Antriebswelle 11 gespannt wird. In dieser Position liegt ein Rückhalteabschnitt 59 am Hebel 13 noch beabstandet zur zweiten Haltefläche 27 an der Arretierhülse 23 an.The interior of the handle 3 or the housing 5 has the following structure: A first bore section 45 has a larger diameter D than the second bore section 47 with diameter d. In the second bore portion 47 sits at the front end of a centering tube 49 with a circular cross-section and is frontally connected to a third bore portion 51 of even smaller diameter. The housing 5 thus comprises three consecutively arranged, stepped bore sections 45, 47 and 51. At the rear end 21 of the transmission in the head piece 7 a polygonal hole 53 is formed, in which the front end 55 of the coupling piece 41 is held against rotation when the drive shaft 11th is fully inserted into the handle (position as in FIG. 1 shown). In this position, a tab 57 engages the lever 13 in the first holding surface 25 and is located there with the inclined edge. By the force F on the lever 13 in the direction T + thereby the front end 55 of the coupling piece 41 is held in the polygonal hole 53, against the force of the spring 37, which is tensioned upon insertion of the drive shaft 11. In this position, a retaining portion 59 is located on the lever 13 still spaced from the second support surface 27 on the locking sleeve 23 at.

Entscheidet sich die Bedienungsperson, die Arbeit zu unterbrechen oder lässt sie die Vorrichtung aus der Hand fallen, so wird der Hebel 13 von der Spannkraft der Feder 19 im Gegenuhrzeigersinn (Pfeil T-) leicht geschwenkt. Durch die Schwenkbewegung löst sich die Lasche 57 am Hebel 13 von der ersten Haltefläche 25. Durch die Kraft der Feder 37 wird nun die Antriebswelle 11 nach rechts verschoben bis die zweite Haltefläche 27 am Rückhalteabschnitt 59 des Hebels 13 anliegt. Eine weitere Verschiebung der Antriebswelle 13 wird dadurch unterbrochen. Ein integriertes Dämpfungselement 61, z.B. ein O-Ring, verhindert und dämpft einen zu heftigen Aufprall der Lasche 59 auf der zweiten Haltefläche 27. Die Verschiebung der Antriebswelle 11 im Handgriff 3 bewirkt, dass das Kupplungsstück 41 bzw. dessen vorderes, einen Sechskantquerschnitt aufweisendes Ende, aus der Mehrkantbohrung 53 hinausgleitet und dadurch den Antriebsstrang zwischen der weiter angetriebenen Antriebswelle 11 und dem Rundmesser 10 unterbrochen wird. Die Antriebswelle 11 verbleibt - aber positioniert sicher gehalten - innerhalb des Handgriffs 3 (Situation in Figur 2).If the operator chooses to interrupt work or let the device fall out of his hand, the lever 13 is slightly pivoted counterclockwise by the biasing force of the spring 19 (arrow T-). As a result of the pivoting movement, the tab 57 on the lever 13 is released from the first holding surface 25. The force of the spring 37 now displaces the drive shaft 11 to the right until the second holding surface 27 bears against the retaining section 59 of the lever 13. A further displacement of the drive shaft 13 is interrupted. An integrated damping element 61, such as an O-ring, prevents and dampens too violent impact of the tab 59 on the second support surface 27. The displacement of the drive shaft 11 in the handle 3 causes the coupling piece 41 and its front, a hexagonal cross-section end having , slides out of the polygonal hole 53 and thereby the drive train between the further driven drive shaft 11 and the circular blade 10 is interrupted. The drive shaft 11 remains - but held securely held - within the handle 3 (situation in FIG. 2 ).

Die Wiederaufnahme der Arbeit und damit des Betriebs des Rundmessers erfolgt durch Vorschieben der Antriebswelle 11 und folglich durch Anpressen des Hebels 13 an den Handgriff 3. Dadurch wird in umgekehrter Reihenfolge wie zuvor durch die Schrägfläche (erste Haltefläche 25) und die erste Lasche 57 am Hebel 13 die Antriebswelle 11 wiederum nach links verschoben und das Kupplungsstück 41 in die Mehrkantbohrung 53 hineingeschoben. Damit ist wieder die Arbeitsstellung gemäss Figur 1 erreicht. Beabsichtigt hingegen die Bedienungsperson, das Kopfstück 7 des Messerführungsrings 8 zusammen mit dem Rundmesser 10 von der Antriebswelle 11 abzunehmen, so zieht sie den Hebel 13 nach unten, d.h. sie schwenkt diesen im Gegenuhrzeigersinn in Richtung T-. Durch die Schwenkbewegung gerät der Rückhalteabschnitt 59 am Hebel 13 ausser Eingriff mit der zweiten Haltefläche 27 an der Arretierhülse 23. Durch die weiter vorhandene Spannkraft der Feder 37 wird die Antriebswelle 11 weiter nach hinten bzw. der Handgriff 3 nach vorne geschoben, wodurch die Antriebswelle 11 bzw. deren am vorderen Ende 9 liegenden Elemente axial nicht mehr im Handgriff 3 gehalten werden (Figur 3).The resumption of work and thus the operation of the circular blade is done by advancing the drive shaft 11 and consequently by pressing the lever 13 to the handle 3. This is in reverse order as before by the inclined surface (first support surface 25) and the first tab 57 on the lever 13, the drive shaft 11 in turn moved to the left and the coupling piece 41 pushed into the polygonal hole 53. This again sets the working position FIG. 1 reached. If, on the other hand, the operator intends to detach the head piece 7 of the knife guide ring 8 together with the circular blade 10 from the drive shaft 11, it pulls the lever 13 downwards, ie it pivots it counterclockwise in the T direction. Due to the pivoting movement of the retaining portion 59 of the lever 13 is disengaged from the second support surface 27 on the locking sleeve 23. By the further existing clamping force of the spring 37, the drive shaft 11 is pushed further to the rear or the handle 3 forward, whereby the drive shaft 11th or whose elements lying at the front end 9 are no longer axially held in the handle 3 ( FIG. 3 ).

Nun kann die Antriebswelle 11 aus dem Gehäuse 5 gezogen werden, obwohl der Hebel 13 am Gehäuse 3 anliegt. Beide Verriegelungen durch die Arretierhülse 23 sind nun aufgehoben.Now, the drive shaft 11 can be pulled out of the housing 5, although the lever 13 rests against the housing 3. Both locks by the locking sleeve 23 are now canceled.

Nach dem vollständigen Herausziehen der Antriebswelle 11 aus dem Gehäuse 5 des Handgriffs 3 kann letzterer zur Reinigung, Wartung und/oder zum Messerwechsel - von allen Antriebsorganen befreit - entnommen werden (Figur 5).After the complete removal of the drive shaft 11 from the housing 5 of the handle 3, the latter can be removed for cleaning, maintenance and / or blade replacement - free of all drive elements - ( FIG. 5 ).

Das Verbinden der Antriebswelle 11 mit dem Handgriff 3 erfolgt in umgekehrter Reihenfolge, d.h. die Antriebswelle 11 wird von rechts in das Gehäuse 5 des Handgriffs 3 eingeschoben und rastet nacheinander am Rückhalteabschnitt 59 und dann an der Lasche 57 am Hebel 13 ein, wodurch die Vorrichtung wieder in Betriebszustand gebracht ist.The connection of the drive shaft 11 to the handle 3 is in reverse order, i. the drive shaft 11 is inserted from the right into the housing 5 of the handle 3 and engages successively on the retaining portion 59 and then on the tab 57 on the lever 13, whereby the device is brought back into operating condition.

Claims (6)

  1. Coupling assembly for a safety shutdown on a circular blade (10) which can be driven by a flexible drive shaft (11), comprising a rod-shaped handle (3) with a pipe-shaped housing (5), on the front end of which a head piece (7) for a blade guide ring (8) is detachably secured and in the rear end of which the drive end (9) of the drive shaft (11) is detachably secured, and a lever (13) hinged on the housing (5) of the handle (3) such that said lever can be swivelled to couple and uncouple the drive shaft (11) from the head piece (7) for the circular blade,
    characterised in that
    a first detent cam (57) and a second detent cam (59) are formed on the lever (13), wherein the first detent cam (57) is formed to maintain the operational function and the second detent cam (59) to hold firmly and to release the drive shaft (11) from the handle (3).
  2. Coupling assembly according to claim 1, characterised in that a locking bushing (23) is arranged in an insertable manner in the pipe-shaped housing (5) of the handle (3), wherein said bushing is secured on the drive shaft (11) and functions as a guide and orientation element for the coupling part on the drive shaft (11) with regard to a mating part (53) on the head part (7) for the circular blade.
  3. Coupling assembly according to claim 2, characterised in that an elastic material (61) lies on the locking bushing (23) and functions as a vibration and impact damper when uncoupling the drive shaft (11).
  4. Coupling assembly according to any one of claims 2 or 3, characterised in that a holding surface or a recess (27) is formed on the locking bushing (23), wherein the second detent cam (59) on the lever (13) engages in said surface or recess when the drive end (9) of the drive shaft (11) is inserted and said surface or recess holds the drive shaft (11) in the housing (5) against axial shifting.
  5. Coupling assembly according to any one of claims 2 to 4, characterised in that a holding surface (25) is formed on the locking bushing (23), wherein the first cam (57) on the lever (13) engages in said surface when the drive end (9) of the drive shaft (11) is inserted where the lever (13) is held in the working position.
  6. Coupling assembly according to any one of claims 1 to 5, characterised in that the lever (13) is held in a central position by spring force and can be brought either into the working position or into an ejection position by applying a counter force F, to release the handle (3) from the drive shaft (11).
EP20130405005 2012-01-26 2013-01-22 Coupling assembly for a safety shutdown Active EP2620262B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00109/12A CH706040A1 (en) 2012-01-26 2012-01-26 Safety clutch for circular knife.

Publications (2)

Publication Number Publication Date
EP2620262A1 EP2620262A1 (en) 2013-07-31
EP2620262B1 true EP2620262B1 (en) 2015-03-11

Family

ID=47664227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130405005 Active EP2620262B1 (en) 2012-01-26 2013-01-22 Coupling assembly for a safety shutdown

Country Status (3)

Country Link
EP (1) EP2620262B1 (en)
CH (1) CH706040A1 (en)
ES (1) ES2535973T3 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB884387A (en) * 1959-12-02 1961-12-13 Heli Strand Tools Ltd A rotary drive control unit for portable power driven tools
US4894915A (en) * 1986-03-20 1990-01-23 Bettcher Industries, Inc. Cable driven ring blade knife
EP0317715A3 (en) * 1987-10-02 1990-08-16 Suhner Inter-Trade AG Apparatus and method for coupling a tool to its drive or for uncoupling it
EP1527854B1 (en) * 1999-10-06 2006-12-27 Bettcher Industries, Inc. Power operated rotary knife
DE60032648T2 (en) 1999-10-06 2007-11-15 Bettcher Industries, Inc., Birmingham Electrically driven rotary blade
DE202010005399U1 (en) * 2010-05-07 2010-08-19 Freund Maschinenfabrik Gmbh & Co. Kg Coupling with safety interlock of the drive shaft of a hand tool

Also Published As

Publication number Publication date
EP2620262A1 (en) 2013-07-31
ES2535973T3 (en) 2015-05-19
CH706040A1 (en) 2013-07-31

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