EP2073956B1 - Sharpening device for knife blades - Google Patents
Sharpening device for knife blades Download PDFInfo
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- EP2073956B1 EP2073956B1 EP07801296A EP07801296A EP2073956B1 EP 2073956 B1 EP2073956 B1 EP 2073956B1 EP 07801296 A EP07801296 A EP 07801296A EP 07801296 A EP07801296 A EP 07801296A EP 2073956 B1 EP2073956 B1 EP 2073956B1
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- Prior art keywords
- sharpening
- guiding slot
- guide slot
- sharpening device
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
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- 230000003750 conditioning effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
- B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
- B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
Definitions
- the invention relates to a sharpening device for knife blades comprising a base plate, a trained as an incision in the base plate guide slot for sharpening knife blade and both sides of the guide slot against a resilient spring restoring force pivotally mounted main sharpening rods, wherein the main sharpening rods intersect at a crossing point in the region of the guide slot ,
- sharpened by use knife blades can be sharpened and brought back into shape.
- cutting protection made of metal can be provided in the inlet region of the guide slot.
- the sharpening process takes place by means of an installation of the knife blade on the main sharpening rods and a removal of the knife blade along the main sharpening rods, which follow the movement of the knife blade along the guide slot.
- the knife blade In order to achieve the desired cutting quality and dimensional accuracy when sharpening a knife blade, the knife blade must usually be repeatedly passed through the sharpening device.
- the invention has for its object to increase when treating a knife blade, the sharpening effect of the sharpening device on a run through them knife blade and to achieve a desired sharpening result with fewer treatment sequences, and to protect the sharpening device during the sharpening process.
- the sharpening device has in the guide slot VorSrfetti that follow the course of the guide slot on both sides, that extend the VorSrf implant from the inlet opening of the guide slot to the intersection of Hauptemporfimplantation, and that the VorSCrf infestation as a cutting protection for the base plate are formed.
- the material of the VorSCrf cloveriana is a hardened material in the rule, such as a metal or a ceramic.
- the VorSCrfimplantation also serve as a cutting protection for the base plate in which the guide slot is formed.
- the base plate is made of a plastic or a light metal and is typically made as an injection molded part.
- the Vorbulfetti are provided in the inlet region of the guide slot.
- the frequency of striking or abutting the knife blade on the lateral boundaries of the guide slot in comparison to the further course of the guide slot is high.
- the cutting protection function of the VorJrfetti has a particularly advantageous in the inlet region.
- the Vorbulfetti extend over the entire length of the guide slot.
- the advantage of this embodiment is that the complete guide path of the knife blade is used both during insertion and during execution for sharpening the knife blade.
- the guide slot in the inlet region preferably has a widening.
- the expansion facilitates the insertion of a knife blade, whereby the guide slot can be formed as narrow as possible and in this way the leadership of the knife blade and the sharpening result can be further improved.
- the Vorbulfetti protrude into the guide slot.
- the distance between the opposing Vorbulrf genomen is chosen smaller than the width of the guide slot, whereby a good sharpening effect of VorSrf infestation is ensured on the knife blade.
- the pre-sharpening elements are designed as rods, preferably as round rods.
- the Vorbulrf genome may also have a polygonal, in particular a triangular cross-sectional shape with a directed to the center of the guide slot sharpening edge.
- the bars advantageously extend along the side edges of the guide slot and are conveniently formed on both the front and rear side edges.
- the VorSCrf organism and / or HauptCrfetti on its surface a coating such as a tungsten carbide coating or a diamond coating, in particular wherein the VorSCrfoir have a coarser surface structure than the HauptCrf genome.
- the choice of the sharpening material determines the sharpening effect, such as grinding, whetting or polishing. When choosing a very hard material, there is no removal of the blade material, but a transformation of the same.
- the actual sharpening process takes place, while the final print on the main sharpness elements with a finer surface structure, the knife blade aftertreated, for example polished, is.
- a further preferred embodiment of the sharpening device according to the invention is characterized in that the VorSCrf genome are interchangeable arranged on the base plate.
- the sharpening device according to the invention can at least partially fulfill its sharpening function both after a decrease of the stationary pre-sharpening elements, ie, exclusively with the main sharpening rods and after a decrease of the movable main sharpening rods, ie only with the pre-sharpening elements.
- a protective plate arranged transversely to the course of the guide slot is preferably provided on the base plate below the guide slot.
- the knife blade When used as intended sharpening device according to the invention, the knife blade is not braked at the lower end of the guide slot and strikes there.
- the protective plate prevents damage to a holder in which the sharpening device is received and fixed, as well as the injury of a user holding the sharpening device.
- the sharpening device advantageously has a handle on which an anti-slip coating is preferably provided.
- the handle allows a user to hold the sharpener in one hand, while with the other hand he can guide the knife with the knife blade to be sharpened into the sharpener.
- the anti-slip coating prevents slippage or slippage of the hand from the handle.
- FIG. 1 is a sharpening device 1 with a substantially oval base plate 2 and designed as a handle handle 3 with a recess 4 shown.
- the dimensions and the material, here a plastic, the sharpening device 1 are chosen such that the sharpening device 1 can be held by a user in one hand.
- the handle 3 allows a user to hold the sharpening device 1 in one hand while being able to guide a knife with a knife blade to be sharpened into the sharpening device 1 with the other hand.
- a protective plate 5 is provided between the base plate 2 and the handle 3.
- an anti-slip coating is preferably provided on the handle 3. The anti-slip coating prevents slippage or slippage of the hand from the handle 3.
- a gap-like guide slot 6 is cut almost over its entire length extension. Formed as round rods VorJ2020rfimplantation 7a and 7b summarize the guide slot 6 on both sides. In an entry region 8, the guide slot 6 is widened or broadened. On both sides of the guide slot 6 fastening means 9a and 9b are arranged, in which HauptCrfstäbe 10a and 10b are pivotally mounted. The HauptCrfstäbe 10 a and 10 b are arranged in mirror image to the guide slot 6 and intersect at a crossing point eleventh
- the curved main sharpening rods 10a and 10b bear against upper stops 12a and 12b.
- Knife blade meets this at the intersection point 11 on the HauptCrfstäbe 10a and 10b and leads them into an end position, not shown.
- the main sharpening rods 10a and 10b perform pivotal movements 14a and 14b against a restoring force generated by a spring element in the fastening means 9a and 9b.
- the main sharpening rods 10a and 10b bear against a lower stop 15, and the processed knife blade is located at the lower end 16 of the guide slot 6.
- the pre-sharpening elements 7a and 7b are chamfered with respect to the (vertical in the figure) alignment of the guide slot 6.
- the angle between the inlet slope and a perpendicular to the central axis of the guide slot 6 standing (horizontal in the figure) transverse axis is selected according to the invention greater than 45 °.
- the pre-sharpening elements 7a and 7b describe a continuously differentiable curve, in other words the curve has neither steps nor edges.
- the Vorbulrfetti 7a and 7b are largely arcuate, with a convex lines, formed. It is also advantageous that the Vorbulrfetti 7a and 7b narrow from the inlet region 8 to the lower end 16 of the guide slot 6. In this way, the sharpening effect of the sharpening device 1 according to the invention is further increased.
- the widened inlet region 8 is always chosen in its vote on the opening width of the guide slot 6 so that the Vorbulrfetti 7 a, 7 b can contribute to sharpening a knife blade.
- Fig. 2 is a view from above of the sharpening device 1 is shown.
- the guide slot 6 is formed.
- the Vorbulrfetti 7 a and 7 b protrude into the Guide slot 6 and narrow it, whereby a facilitated leadership to be sharpened knife blade and a better sharpening result can be achieved.
- the fastening means 9a is the simply executed Schobulrfstab 10a, in the fastening means 9b, two parallel SchoCrfstäbe 10b and 10b 'are pivotally mounted.
- a knife blade to be sharpened travels along its guide path along the guide slot 6 to the stationary pre-sharpening elements 7a, 7b and to the movable main sharpening rods 10a, 10b, whereby the sharpening effect of the sharpening device 1 on the knife blade is increased.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Knives (AREA)
Abstract
Description
Die Erfindung betrifft eine Schärfvorrichtung für Messerklingen, umfassend eine Grundplatte, einen als Einschnitt in der Grundplatte ausgebildeten Führungsschlitz für eine zu schärfende Messerklinge und beidseits des Führungsschlitzes gegen eine elastisch federnde Rückstellkraft schwenkbar gelagerte Hauptschärfstäbe, wobei sich die Hauptschärfstäbe in einem Kreuzungspunkt im Bereich des Führungsschlitzes kreuzen.The invention relates to a sharpening device for knife blades comprising a base plate, a trained as an incision in the base plate guide slot for sharpening knife blade and both sides of the guide slot against a resilient spring restoring force pivotally mounted main sharpening rods, wherein the main sharpening rods intersect at a crossing point in the region of the guide slot ,
Mithilfe einer derartigen Schärfvorrichtung, wie sie beispielsweise aus der
Der Erfindung liegt die Aufgabe zugrunde, beim Behandeln einer Messerklinge die Schärfwirkung der Schärfvorrichtung auf eine durch sie geführte Messerklinge zu erhöhen und mit weniger Behandlungsfolgen ein gewünschtes Schärfergebnis zu erreichen, und sowie die Schärfvorrichtung beim Schärfvorgang zu schützen.The invention has for its object to increase when treating a knife blade, the sharpening effect of the sharpening device on a run through them knife blade and to achieve a desired sharpening result with fewer treatment sequences, and to protect the sharpening device during the sharpening process.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Schärfvorrichtung im Führungsschlitz Vorschärfelemente aufweist, die an beiden Seiten dem Verlauf des Führungsschlitzes folgen, dass sich die Vorschärfelemente von der Eintrittsöffnung des Führungsschlitzes bis zum Kreuzungspunkt der Hauptschärfelemente erstrecken, und dass die Vorschärfelemente als Schneidschutz für die Grundplatte ausgebildet sind.The object is achieved in that the sharpening device has in the guide slot Vorschärfelemente that follow the course of the guide slot on both sides, that extend the Vorschärfelemente from the inlet opening of the guide slot to the intersection of Haupschärfelemente, and that the Vorschärfelemente as a cutting protection for the base plate are formed.
Bei einer längs des Führungsschlitzes geführten Bewegung passiert eine Messerklinge die Vorschärfelemente und wird durch ein Entlangstreifen an diesen geschärft. Der zusätzliche Schärfeffekt wird bei der erfindungsgemäßen Schärfvorrichtung dadurch erreicht, dass eine zu schärfende Messerklinge beim Durchlaufen ihres Führungsweges an den beweglichen Hauptschärfstäben und den stationären, ortsfesten Vorschärfelementen entlang des Führungsschlitzes anliegt. Die Effizienz des Schärfvorgangs ist bei der erfindungsgemäßen Schärfvorrichtung dadurch erhöht, dass das gewünschte Ergebnis im Vergleich zu herkömmlichen Schärfvorrichtungen mit weniger Führungsbewegungen der Messerklinge durch die Schärfvorrichtung erreicht wird. Die Vorschärfelemente liegen sich beidseits des Führungsschlitzes gegenüber und sind als Schleif-, Wetz- und/oder Polierelemente ausgebildet. Das Material der Vorschärfelemente ist ein in der Regel gehärteter Werkstoff, wie ein Metall oder eine Keramik. Die Vorschärfelemente dienen darüber hinaus als Schneidschutz für die Grundplatte, in der der Führungsschlitz ausgebildet ist. Die Grundplatte besteht aus einem Kunststoff oder einem Leichtmetall und ist typischerweise als Spritzgussteil hergestellt.In a guided along the guide slot movement passes through a knife blade Vorschärfelemente and is sharpened by a stripe along this. The additional sharpening effect is achieved in the sharpening device according to the invention in that a knife blade to be sharpened when passing through its guide path to the movable Hauptschärfstäben and abuts the stationary, stationary Vorschärfelementen along the guide slot. The efficiency of the sharpening process is increased in the sharpening device according to the invention in that the desired result compared to conventional sharpening with less guiding movements of the knife blade is achieved by the sharpening device. The Vorschärfelemente are opposite to both sides of the guide slot and are designed as grinding, Wetz- and / or polishing. The material of the Vorschärfelemente is a hardened material in the rule, such as a metal or a ceramic. The Vorschärfelemente also serve as a cutting protection for the base plate in which the guide slot is formed. The base plate is made of a plastic or a light metal and is typically made as an injection molded part.
In einer bevorzugten Ausführungsform der erfindungsgemäßen Schärfvorrichtung sind die Vorschärfelemente im Eintrittsbereich des Führungsschlitzes vorgesehen. Im Eintrittsbereich ist die Häufigkeit eines Anschlagens bzw. Anliegens der Messerklinge an den seitlichen Begrenzungen des Führungsschlitzes im Vergleich zum weiteren Verlauf des Führungsschlitzes hoch. Darüber hinaus wirkt sich die Schneidschutzfunktion der Vorschärfelemente im Eintrittsbereich besonders vorteilhaft aus.In a preferred embodiment of the sharpening device according to the invention the Vorschärfelemente are provided in the inlet region of the guide slot. In the entry area, the frequency of striking or abutting the knife blade on the lateral boundaries of the guide slot in comparison to the further course of the guide slot is high. In addition, the cutting protection function of the Vorschärfelemente has a particularly advantageous in the inlet region.
In dieser Ausführungsform mit Vorschärfelementen bis zum Kreuzungspunkt der Hauptschärfelemente ist der Führungsweg vom Eintritt der Messerklinge in den Führungsschlitz bis zur Anlage der Messerklinge an den Hauptschärfstäben größtmöglichst für einen zusätzlichen Schärfeffekt durch die Vorschärfelemente genutzt.In this embodiment with Vorschärfelementen to the intersection of Hauptschärfelemente the guide path from the entry of the knife blade into the guide slot to the conditioning of the knife blade on the Hauptschärfstäben is used as possible for an additional sharpening effect by the Vorschärfelemente.
In einer weiteren bevorzugten Ausführungsform der Erfindung erstrecken sich die Vorschärfelemente über die gesamte Länge des Führungsschlitzes. Der Vorteil dieser Ausführungsform liegt darin, dass der komplette Führungsweg der Messerklinge sowohl beim Einführen als auch beim Ausführen zum Schärfen der Messerklinge genutzt wird.In a further preferred embodiment of the invention, the Vorschärfelemente extend over the entire length of the guide slot. The advantage of this embodiment is that the complete guide path of the knife blade is used both during insertion and during execution for sharpening the knife blade.
Weiter weist der Führungsschlitz im Eintrittsbereich bevorzugt eine Aufweitung auf. Die Aufweitung erleichtert das Einführen einer Messerklinge, wodurch der Führungsschlitz möglichst eng ausgebildet werden kann und auf diese Weise die Führung der Messerklinge und das Schärfergebnis weiter verbessert werden.Next, the guide slot in the inlet region preferably has a widening. The expansion facilitates the insertion of a knife blade, whereby the guide slot can be formed as narrow as possible and in this way the leadership of the knife blade and the sharpening result can be further improved.
Vorteilhafterweise ragen die Vorschärfelemente in den Führungsschlitz. Der Abstand zwischen den sich gegenüberliegenden Vorschärfelementen wird geringer als die Breite des Führungsschlitzes gewählt, wodurch eine gute Schärfwirkung der Vorschärfelemente auf die Messerklinge sicher gestellt wird.Advantageously, the Vorschärfelemente protrude into the guide slot. The distance between the opposing Vorschärfelementen is chosen smaller than the width of the guide slot, whereby a good sharpening effect of Vorschärfelemente is ensured on the knife blade.
In einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Schärfvorrichtung sind die Vorschärfelemente als Stäbe, bevorzugt als Rundstäbe, ausgebildet. Die Vorschärfelemente können jedoch auch eine eckige, insbesondere eine dreieckige Querschnittsform mit einer zur Mitte des Führungsschlitzes gerichteten Schärfkante aufweisen. Die Stäbe verlaufen vorteilhafterweise entlang der Seitenkanten des Führungsschlitzes und sind zweckmäßigerweise sowohl an den vorderen als auch an den hinteren Seitenkanten ausgebildet.In a further preferred embodiment of the sharpening device according to the invention, the pre-sharpening elements are designed as rods, preferably as round rods. However, the Vorschärfelemente may also have a polygonal, in particular a triangular cross-sectional shape with a directed to the center of the guide slot sharpening edge. The bars advantageously extend along the side edges of the guide slot and are conveniently formed on both the front and rear side edges.
In einer bevorzugten Weiterbildung dieser Ausbildungsform ragen die Vorschärfelemente mit dem halben, bevorzugt mit dem gesamten Stabdurchmesser in den Führungsschlitz. Auf diese Weise werden eine gute Anlage der Messerklinge an den Vorschärfelementen und ein guter Schärfeffekt erreicht.In a preferred embodiment of this embodiment form the Vorschärfelemente with half, preferably with the entire rod diameter in the guide slot. In this way, a good conditioning of the knife blade on the Vorschärfelementen and a good sharpening effect can be achieved.
In einer bevorzugten Ausführungsform der Erfindung weisen die Vorschärfelemente und/oder die Hauptschärfelemente an ihrer Oberfläche eine Beschichtung, wie eine Wolfram-Carbid-Beschichtung oder eine Diamant-Beschichtung, auf, insbesondere wobei die Vorschärfelemente eine gröbere Oberflächenstruktur als die Hauptschärfelemente aufweisen. Über die Wahl des Schärfmaterials wird der Schärfeffekt, wie ein Schleifen, ein Wetzen oder ein Polieren, festgelegt. Bei der Wahl eines sehr harten Materials findet kein Abtragen des Klingenmaterials, sondern eine Umformung desselben statt. An den Vorschärfelementen mit der gröberen Oberflächenstruktur findet der eigentliche Schärfprozess statt, während beim Endabzug an den Hauptschärfeelementen mit einer feineren Oberflächenstruktur die Messerklinge nachbehandelt, beispielsweise poliert, wird.In a preferred embodiment of the invention, the Vorschärfelemente and / or Hauptschärfelemente on its surface a coating, such as a tungsten carbide coating or a diamond coating, in particular wherein the Vorschärfelemente have a coarser surface structure than the Hauptschärfelemente. The choice of the sharpening material determines the sharpening effect, such as grinding, whetting or polishing. When choosing a very hard material, there is no removal of the blade material, but a transformation of the same. At the Vorschärfelementen with the coarser surface structure, the actual sharpening process takes place, while the final print on the main sharpness elements with a finer surface structure, the knife blade aftertreated, for example polished, is.
Eine weitere bevorzugte Ausführungsform der erfindungsgemäßen Schärfvorrichtung ist dadurch gekennzeichnet, dass die Vorschärfelemente auswechselbar an der Grundplatte angeordnet sind. Durch ausnehm- bzw. auswechselbare Vorschärfelemente wird nicht nur die Reinigung der erfindungsgemäßen Schärfvorrichtung erleichtert, sondern die Schärfvorrichtung kann je nach Einsatzzweck optimiert mit entsprechenden Vorschärfelementen bestückt werden. Die erfindungsgemäße Schärfvorrichtung kann ihre Schärffunktion sowohl nach einer Abnahme der ortsfesten Vorschärfelemente, d.h., ausschließlich mit den Hauptschärfstäben als auch nach einer Abnahme der beweglichen Hauptschärfstäbe, d.h., nur mit den Vorschärfelementen zumindest teilweise weiter erfüllen.A further preferred embodiment of the sharpening device according to the invention is characterized in that the Vorschärfelemente are interchangeable arranged on the base plate. By ausnehm- or interchangeable Vorschärfelemente not only the cleaning of the sharpening device according to the invention is facilitated, but the sharpening device can be optimized depending on the application equipped with appropriate Vorschärfelementen. The sharpening device according to the invention can at least partially fulfill its sharpening function both after a decrease of the stationary pre-sharpening elements, ie, exclusively with the main sharpening rods and after a decrease of the movable main sharpening rods, ie only with the pre-sharpening elements.
Weiter ist an der Grundplatte unterhalb des Führungsschlitzes bevorzugt eine quer zum Verlauf des Führungsschlitzes angeordnete Schutzplatte vorgesehen. Beim bestimmungsgemäßen Gebrauch der erfindungsgemäßen Schärfvorrichtung wird die Messerklinge am unteren Ende des Führungsschlitzes nicht abgebremst und schlägt dort auf. Die Schutzplatte verhindert eine Beschädigung einer Halterung, in der die Schärfvorrichtung aufgenommen und befestigt ist, sowie die Verletzung eines die Schärfvorrichtung haltenden Benutzers.Furthermore, a protective plate arranged transversely to the course of the guide slot is preferably provided on the base plate below the guide slot. When used as intended sharpening device according to the invention, the knife blade is not braked at the lower end of the guide slot and strikes there. The protective plate prevents damage to a holder in which the sharpening device is received and fixed, as well as the injury of a user holding the sharpening device.
Die Schärfvorrichtung weist vorteilhafter Weise einen Griff auf, an dem bevorzugt eine Antirutsch-Beschichtung vorgesehen ist. Der Griff erlaubt einem Benutzer, die Schärfvorrichtung in einer Hand zu halten, während er mit der anderen Hand das Messer mit der zu schärfenden Messerklinge in die Schärfvorrichtung führen kann. Durch die Antirutsch-Beschichtung wird ein Abgleiten bzw. Abrutschen der Hand vom Griff vermieden.The sharpening device advantageously has a handle on which an anti-slip coating is preferably provided. The handle allows a user to hold the sharpener in one hand, while with the other hand he can guide the knife with the knife blade to be sharpened into the sharpener. The anti-slip coating prevents slippage or slippage of the hand from the handle.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der Beschreibung und den Figuren der Zeichnung. Die erfindungsgemäße Schärfvorrichtung ist in einem Ausführungsbeispiel in den Figuren gezeigt. Die in den Figuren gezeigten Merkmale sind rein schematisch und nicht maßstäblich zu verstehen. Es zeigt:
- Fig. 1
- eine Vorderansicht einer erfindungsgemäßen Schärfvorrichtung; und
- Fig. 2
- eine Draufsicht der in
Fig. 1 gezeigten Schärfvorrichtung.
- Fig. 1
- a front view of a sharpening device according to the invention; and
- Fig. 2
- a top view of the
Fig. 1 shown sharpening device.
In
In die Grundplatte 2 ist nahezu über ihre gesamte Längenerstreckung ein spaltartiger Führungsschlitz 6 eingeschnitten. Als Rundstäbe ausgebildete Vorschärfelemente 7a und 7b fassen den Führungsschlitz 6 auf beiden Seiten ein. In einem Eintrittsbereich 8 ist der Führungsschlitz 6 aufgeweitet bzw. verbreitert. Beidseits des Führungsschlitzes 6 sind Befestigungsmittel 9a und 9b angeordnet, in denen Hauptschärfstäbe 10a und 10b schwenkbar gelagert sind. Die Hauptschärfstäbe 10a und 10b sind spiegelbildlich zum Führungsschlitz 6 angeordnet und kreuzen sich in einem Kreuzungspunkt 11.In the
In der gezeigten Ausgangsstellung liegen die gekrümmten Hauptschärfstäbe 10a und 10b an oberen Anschlägen 12a und 12b an. Bei einer Eintrittsbewegung 13 einer entlang des Führungsschlitzes 6 geführten Messerklinge trifft diese am Kreuzungspunkt 11 auf die Hauptschärfstäbe 10a und 10b und führt diese in eine nicht gezeigte Endstellung. Dabei führen die Hauptschärfstäbe 10a und 10b Schwenkbewegungen 14a und 14b gegen eine Rückstellkraft, welche durch ein Federelement in den Befestigungsmitteln 9a und 9b erzeugt wird, aus. In der Endstellung liegen die Hauptschärfstäbe 10a und 10b an einem unteren Anschlag 15 an, und die bearbeitete bzw. behandelte Messerklinge befindet sich am unteren Ende 16 des Führungsschlitzes 6. Beim Durchlaufen des kompletten Führungsschlitzes 6, vom Eintrittsbereich 8 bis zum unteren Ende 16, streift die Messerklinge entlang der Vorschärfelemente 7a und 7b und entlang der Hauptschärfstäbe 10a und 10b.In the starting position shown, the curved main sharpening
Im Eintrittsbereich 8 des Führungsschlitzes 6 sind die Vorschärfelemente 7a und 7b gegenüber der (in der Figur vertikalen) Ausrichtung des Führungsschlitzes 6 abgeschrägt. Der Winkel zwischen der Einlaufschräge und einer senkrecht zur Mittelachse des Führungsschlitzes 6 stehenden (in der Figur horizontalen) Querachse wird erfindungsgemäß größer als 45° gewählt. Über ihre gesamte Längenerstreckung beschreiben die Vorschärfelemente 7a und 7b eine stetig differenzierbare Kurve, mit anderen Worten weist der Kurvenverlauf weder Stufen noch Kanten auf. In der Figur sind die Vorschärfelemente 7a und 7b weitgehend bogenförmig, mit einer konvexen Linienführung, ausgebildet. Es ist darüberhinaus vorteilhaft, dass sich die Vorschärfelemente 7a und 7b vom Eintrittsbereich 8 bis zum unteren Ende 16 des Führungsschlitzes 6 verengen. Auf diese Weise wird die Schärfwirkung der erfindungsgemäßen Schärfvorrichtung 1 weiter erhöht.In the
Der aufgeweitete Eintrittsbereich 8 ist in seiner Abstimmung auf die Öffnungsweite des Führungsschlitzes 6 immer so gewählt, dass die Vorschärfelemente 7a, 7b einen Beitrag zum Schärfen einer Messerklinge leisten können.The widened
In
Eine Schärfvorrichtung 1 mit einem Führungsschlitz 6 für eine zu schärfende Messerklinge und beidseits des Führungsschlitzes 6 angeordneten Hauptschärfstäben 10a, 10b, die sich in einem Kreuzungspunkt 11 im Bereich des Führungsschlitzes 6 kreuzen und bei einer Anlage einer Messerklinge Schwenkbewegungen 14a, 14b gegen eine elastisch federnde Rückstellkraft ausführen, weist zusätzlich in zumindest einem Längenabschnitt des Führungsschlitzes 6 Vorschärfelemente 7a, 7b auf. Eine zu schärfende Messerklinge liegt beim Durchlaufen ihres Führungsweges entlang des Führungsschlitzes 6 an den ortsfesten Vorschärfelementen 7a, 7b und an den beweglichen Hauptschärfstäben 10a, 10b an, wodurch die Schärfwirkung der Schärfvorrichtung 1 auf die Messerklinge erhöht wird.A sharpening
Claims (10)
- Sharpening device (1) for knife blades, comprising a base plate (2),
a guiding slot (6) formed as a recess in the base plate (2) for a knife blade to be sharpened,
and main sharpening rods (10a, 10b) rotatably mounted on both sides of the guiding slot (6) against an elastic spring-activated resetting force, with the main sharpening rods (10a, 10b) crossing each other in a crossing point (11) in the area of the guiding slot (6),
characterized in that
there are pre-sharpening elements (7a, 7b) in the guiding slot (6), which follow the course of the guiding slot (6) on both sides,
the pre-sharpening elements (7a, 7b) extend from the entry opening of the guiding slot (6) to the crossing point (11) of the main sharpening rods (10a, 10b), and
the pre-sharpening elements (7a, 7b) are formed as cutter guard for the base plate (2). - Sharpening device in accordance with Claim 1, characterized in that the pre-sharpening elements (7a, 7b) extend across the entire length of the guiding slot (6).
- Sharpening device in accordance with one of the preceding claims, characterized in that the guiding slot (6) is widened in its entry area (8).
- Sharpening device in accordance with one of the preceding claims, characterized in that the pre-sharpening elements (7a, 7b) protrude into the guiding slot (6).
- Sharpening device in accordance with one of the preceding claims, characterized in that the pre-sharpening elements (7a, 7b) are formed as rods, preferably as round rods.
- Sharpening device in accordance with Claim 5, characterized in that the pre-sharpening elements (7a, 7b) protrude into the guiding slot (6) with half of their diameter, preferably with their entire diameter.
- Sharpening device in accordance with one of the preceding claims, characterized in that the pre-sharpening elements (7a, 7b) and/or the main sharpening rods (10a, 10b) have on their surface a coating, such as a tungsten-carbide coating or a diamond coating, in particular with the pre-sharpening elements (7a, 7b) having a coarser surface structure than the main sharpening rods (10a, 10b).
- Sharpening device in accordance with one of the preceding claims, characterized in that the pre-sharpening elements (7a, 7b) are arranged on the base plate (2) in a replaceable fashion.
- Sharpening device in accordance with one of the preceding claims, characterized in that on the base plate (2) below the guiding slot (6), a protective plate (5) is provided that is arranged crosswise to the course of the guiding slot (6).
- Sharpening device in accordance with one of the preceding claims, characterized in that the sharpening device (1) has a handle (3) that is preferably provided with an anti-slipping coating.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006041538A DE102006041538B3 (en) | 2006-09-05 | 2006-09-05 | Sharpening device for knife blades has a guide slot for knife blades to be sharpened and main moving sharpening rods fitted on each side of the guide slot |
PCT/DE2007/001559 WO2008028464A1 (en) | 2006-09-05 | 2007-08-31 | Sharpening device for knife blades |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2073956A1 EP2073956A1 (en) | 2009-07-01 |
EP2073956B1 true EP2073956B1 (en) | 2010-06-23 |
Family
ID=38695524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07801296A Active EP2073956B1 (en) | 2006-09-05 | 2007-08-31 | Sharpening device for knife blades |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100112921A1 (en) |
EP (1) | EP2073956B1 (en) |
AT (1) | ATE471793T1 (en) |
DE (2) | DE102006041538B3 (en) |
DK (1) | DK2073956T3 (en) |
WO (1) | WO2008028464A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009014935U1 (en) | 2009-03-04 | 2010-09-23 | Friedr. Dick Gmbh & Co. Kg | Sharpening device for knife blades |
US20230321783A1 (en) * | 2022-04-11 | 2023-10-12 | Hantover, Inc. | Handheld blade steel |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1909743A (en) * | 1927-03-16 | 1933-05-16 | Blankner William | Knife sharpening device |
US4530188A (en) * | 1983-05-19 | 1985-07-23 | Louis N. Graves Company, Inc. | Sharpening apparatus |
US4934110A (en) * | 1985-04-22 | 1990-06-19 | John Juranitch | Edge sharpening apparatus |
US5040435A (en) * | 1991-01-31 | 1991-08-20 | General Housewares Corp. | Knife edge deburring apparatus |
US5478272A (en) * | 1994-07-07 | 1995-12-26 | Cozzini, Inc. | Blade sharpening apparatus |
US5440953A (en) * | 1994-09-22 | 1995-08-15 | Tru Hone Corporation | Knife sharpener |
DE10052439C1 (en) * | 2000-10-23 | 2001-10-31 | Alois Spreitz | Knife sharpening device with two crossed sharpening rods has ceramic rods and arc-shaped guides either side of slot |
FR2824770B1 (en) * | 2001-05-18 | 2003-10-03 | Bobet Materiel | APPARATUS FOR SHARPENING BLADES OF SHARP TOOLS |
DE10151961C1 (en) * | 2001-10-20 | 2002-10-17 | Dick Friedr Gmbh | Knife sharpening and polishing device, contains intersecting sharpening bars associated with weights and spring loaded excentral discs |
US6866569B2 (en) * | 2002-11-14 | 2005-03-15 | Cozzini, Inc. | Blade sharpening apparatus |
FR2867098B1 (en) * | 2004-03-04 | 2006-05-05 | Dassaud Fils Sa | DEVICE FOR SHARPENING TOOL BLADE OF CUTTING TOOL |
-
2006
- 2006-09-05 DE DE102006041538A patent/DE102006041538B3/en not_active Expired - Fee Related
-
2007
- 2007-08-31 EP EP07801296A patent/EP2073956B1/en active Active
- 2007-08-31 DE DE502007004213T patent/DE502007004213D1/en active Active
- 2007-08-31 DK DK07801296.0T patent/DK2073956T3/en active
- 2007-08-31 AT AT07801296T patent/ATE471793T1/en active
- 2007-08-31 WO PCT/DE2007/001559 patent/WO2008028464A1/en active Application Filing
- 2007-08-31 US US12/310,697 patent/US20100112921A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE102006041538B3 (en) | 2008-01-10 |
ATE471793T1 (en) | 2010-07-15 |
DE502007004213D1 (en) | 2010-08-05 |
EP2073956A1 (en) | 2009-07-01 |
US20100112921A1 (en) | 2010-05-06 |
WO2008028464A1 (en) | 2008-03-13 |
DK2073956T3 (en) | 2010-10-11 |
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