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EP2758211B1 - Sharpening device - Google Patents

Sharpening device Download PDF

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Publication number
EP2758211B1
EP2758211B1 EP12759131.1A EP12759131A EP2758211B1 EP 2758211 B1 EP2758211 B1 EP 2758211B1 EP 12759131 A EP12759131 A EP 12759131A EP 2758211 B1 EP2758211 B1 EP 2758211B1
Authority
EP
European Patent Office
Prior art keywords
sharpening
base body
brackets
sharpening device
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12759131.1A
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German (de)
French (fr)
Other versions
EP2758211A1 (en
Inventor
Horst Löhnert
Thomas TAKACS
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.)
Friedr Dick GmbH and Co KG
Original Assignee
Friedr Dick GmbH and Co KG
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Publication date
Application filed by Friedr Dick GmbH and Co KG filed Critical Friedr Dick GmbH and Co KG
Publication of EP2758211A1 publication Critical patent/EP2758211A1/en
Application granted granted Critical
Publication of EP2758211B1 publication Critical patent/EP2758211B1/en
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Classifications

    • 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 the blade of a cutting tool.
  • the blades of cutting tools are subject in use in the area of their cutting a high mechanical stress, by which the cutting edges lose their cutting ability, ie dull.
  • the blades must therefore be reground at regular intervals to maintain their cutting performance.
  • the blade especially in professional use, usually resharpened by peeling off the blade on a sharpening steel or a sharpening device with crossed sharpening. With such a removal of the blade, an undesired ridge formed on the cutting edge of the blade is directed, whereby the edge retention of the blade increases noticeably.
  • a sharpening device with crossed sharpening bars which has a plate-shaped base body with a guide slot for a blade to be resharpened.
  • the sharpening brackets are bent in a U-shape and articulated on both sides of the guide slot on the base body so that the sharpening brackets can be deflected from their rest position by a pressure of a blade inserted into the guide slot relative to the base body.
  • the sharpening brackets are designed as torsion spring elements and each have two sharpening arm arms, which are connected to one another at one end.
  • each angled portions are provided which form hinge axes. These joint axes are each freely rotatably arranged in mutually offset installation openings of the base body in order to achieve an elastic recovery of the sharpening by a torsion effect.
  • the object of the invention is to provide a sharpening device which overcomes the aforementioned disadvantages of the prior art.
  • the sharpening brackets are each articulated on the base body with only one of their sharpening arm arms and are preferably supported exclusively on the respective other sharpening arm on the main body.
  • Supporting means in the present case also a support with translatory degrees of freedom of the sharpening arm with respect to the base body.
  • the sharpening brackets extend over the plate-shaped base body with their two sharpening bracket arms.
  • a sharpening bow arm is hinged on one side of the main body and the other sharpening arm of the sharpening arm is supported on the respective other side of the main body in both sharpening arms.
  • the sharpening device can be realized in a structurally simplified construction with a low overall height.
  • this is for handling the sharpening advantage and allows a smaller footprint of the sharpening device during storage and transport. Also, this may reduce the risk of injury to an operator by structures protruding excessively from the base.
  • the arms of the sharpening arms are preferably articulated to the plate-shaped base body of the sharpening device in such a way that they can be deflected from their rest position without contact to the base body, ie, without them grinding on the base body.
  • a synchronous deflection of the two sharpening bow against the Ensured basic body of the sharpening device. This allows a reproducible and especially high-quality sharpening result of the blade.
  • Both sharpening straps of a respective sharpening bow can be designed to run straight at their free ends according to the invention. This simplifies the production of the sharpening bow according to the invention and also its mounting on the base plate.
  • the sharpening brackets are arranged on the base body such that the elastically resilient restoring force is generated by an elastic deformation, in particular torsion, of the sharpening bow.
  • the sharpening brackets are in this respect made of a material, such as a stainless spring steel, formed with a material inherent elasticity. As a result, the sharpening levers deflected out of their rest position automatically return to their idle state without permanent deformation.
  • the sharpening brackets are thus each designed in the sense of a torsion spring element.
  • a number of the components required for the production of the sharpening device can thereby be kept low. In addition, this also results in hygiene aspects advantages.
  • a simple linear or planar abutment is sufficient. This is preferably formed by a bolt arranged on the base body, a pin, a cross-sectionally L-shaped profile piece or the like. It is understood that the sharpening arm is secured to the body preferably against unwanted slipping of the abutment.
  • the elastic restoring force of the sharpening bow is preferably variably adjustable.
  • a very uniform sharpening result of the blade relative to the two cutting edges of the blade to be sharpened can be achieved.
  • the sharpness effect of the sharpening device can be adjusted as needed become.
  • the main body of the sharpening device is preferably provided circumferentially with spaced abutment surfaces arranged for the sharpening.
  • the rest position of the sharpening bow and its maximum deflection position relative to the base body can be defined. Due to the circumferentially arranged abutment surfaces thus eliminates structures that protrude on the front or back of the base plate from the base of a plane defined by this plane. This is, as already explained above, from the point of view of occupational safety and a low overall height of the sharpening advantage.
  • the base body has at least one, preferably two, engagement recesses.
  • these are preferably arranged in each case on one side of the passage opening of the base body.
  • the sharpening device can thereby be placed in two working positions, i. with the operator facing the front or back of the body can be used. This is particularly advantageous when using sharpening arms whose sharpening bow arms differ in their surface roughness, since the blade to be sharpened can be selectively pulled off (pulled along) along the sharpening arm arms provided for a desired machining result.
  • the engagement recess is preferably limited for a particularly ergonomic and safe handling of a wall portion of the body, which is provided with recessed grips.
  • the recessed grips are advantageously designed ergonomically rounded.
  • the base body has at least one, preferably two, handle portions.
  • the grip sections preferably have an angled edge region, which forms a hand rest.
  • the base body is preferably provided with a fastening device.
  • the fastening device can In particular, have a tongue-shaped or flange-like attachment extension.
  • the fastening extension can, according to the invention, have recesses for fastening means, such as bolts and / or screws, for the purposes of a rotationally secure mounting of the sharpening device on a base.
  • the main body and the sharpening bow are most preferably made of a stainless steel. This allows the sharpener to be used in corrosive environments without being damaged. In addition, very high hygienic standards, such as those applied in food processing plants, such as (large) kitchens, butcheries and the like, can be easily taken into account. Stainless steel offers advantages over plastics in terms of adhesion of bacteria and the formation of unwanted biofilms. In addition, the stability of said sharpening device is increased.
  • the main body is preferably hardened in the region of its walls bounding the guide slot, in particular nitrided.
  • the invention relates to a sharpening device for the blade of a cutting tool, with a plate-shaped base body having a guide slot for a blade to be sharpened.
  • sharpening arms are pivotally hinged on both sides of the guide slot.
  • the sharpening brackets each have two sharpening arm arms, which are connected to one another at one end, wherein the sharpening brackets can be pivoted from their respective rest position by a pressure of the inserted into the guide slot blade against an elastically resilient restoring force, by an elastic deformation, in particular Twist generated sharpening strap.
  • the sharpening brackets are articulated with only one of their sharpening arm arms under contact with the main body and supported with the respective other sharpening arm exclusively on the main body.
  • Fig. 1 shows a sharpening device 10 according to the invention for the blade of a cutting tool not shown in detail.
  • the sharpening device 10 has a plate-shaped base body 12 which is provided with a formed as an incision in the base body 12 guide slot 14 for the blade to be sharpened of the cutting tool.
  • the guide slot 14 extends from its inlet region 16 almost over the entire longitudinal extension L of the base body 12 and is formed by two opposing walls 18 of the main body 12 educated. In the entry region 16, the guide slot 14 is widened or widened funnel-shaped in order to facilitate the insertion of a blade to be sharpened.
  • the base body 12 On the base body 12 are on both sides of the guide slot 14 substantially U-shaped curved Schwarzrfbügel 20, 22 hinged, which intersect in a guide slot 14 overlapping crossing point 24 .
  • the two sharpening brackets 20, 22 are arranged substantially mirror-inverted to the guide slot 14 and the same shape.
  • Fig. 2 is the sharpening device in one along the in Fig. 1 reproduced with AA designated section line guided longitudinal section.
  • the two sharpening brackets 20, 22 each have two sharpening arm arms 20a, 20b, 22a, 22b , which are connected to each other at one end via a curved back section 26 of the sharpening brackets 20, 22.
  • the two sharpening brackets 20, 22 each encompass the main body 12 of the sharpening device 10 with their respective sharpening arm arms 20a, 20b, 22a, 22b.
  • one sharpening arm 20a, 22a respectively covers the main body 12 at its front side 28, while another sharpening arm 20b, 22b of the sharpening arm 20, 22 covers the main body 12 respectively at its rear side 30 .
  • the two sharpening brackets 20, 22 with a free and straight end section 32 of only one of their sharpening arm arms 20a, 20b, 22a, 22b are rotatably mounted via attachment means 34 at articulation points 36 of the base body 12.
  • these are the sharpening arm arms 20a and 22b.
  • the free end portions 32 of these two sharpening arms 20a, 22b are not angled and extend into the fasteners 34, in which they are clamped.
  • the fastening means 34 extend through Befest TrentsffenausEnglishept not shown in detail of the base body 12 and are pivotable in this together with the respective sharpening bow 20, 22 relative to the base body 12, i. the fastening means 34 are rotatably mounted in the base body 12.
  • the sharpening brackets 20, 22 are supported with a free and straight end portion 32 of their respective other sharpening arm 20b, 22a only on a profile projection 38 of the base body 12. That is, the free ends 32 of the sharpening bow arms 20b, 22a are not pivotally connected to the base body 12 here.
  • the profile projections 38 each serve as an abutment for the end portions 32 of the sharpening arm 20b and the sharpening arm 22a. These two sharpening bow arms 20b and 22a rest loosely against the profile projections 38.
  • the sharpening bow 20 is thus articulated with its sharpening arm 20 a on the front side 28 of the base body 12 in the pivot point 36 rotatably on the base body 12.
  • the other sharpening bow arm 20b of the sharpening bow 20 in contrast, on the rear side 30 of the main body on the in Fig. 2 supported profile projection 38 supported.
  • the sharpening bracket 22 is with its rear sharpening bow arm 22 b on the back 30 of the base body 12 at the in the Fig. 1 hinged point 36 shown pivotally hinged on the base body 12 and with its sharpening arm 22a on the front 28 of the Base 12 at the in Fig. 1 shown profile projection 38 of the body 12 supported.
  • the profile projections 38 project from the front side 28 and the rear side 30 of the main body 12 beyond the front and rear sides 28, 30 thereof and are offset relative to the corresponding articulation points 36 of the respective sharpening brackets 20, 22 on the main body 12.
  • the profile projections 38 are welded to the base body 12 in the present case.
  • the profile projections 38 can also be punched out of the material of the base body 12 and bent in shape.
  • the profile projections 38 may also be formed by separate to the main body 12 components which extend through a recess of the base body 12 and which may be rotatably connected to the main body 12.
  • the sharpening pins 20, 22 are pivotable by a directed in the direction of arrow 40 pressure of an inserted into the guide slot 14 blade from its shown rest position against a resiliently elastic restoring force relative to the body 12 in a direction indicated with arrows 42 the direction of rotation relative to the base body 12th
  • the sharpening brackets 20, 22 are in their shown rest position with their curved back portions 26 on the first stop surfaces 44 of the body 12, which are formed on the outer periphery 46 .
  • a guided along the guide slot 14 blade thus meets in the region of the intersection point 24 on the sharpening 20a, 20b and leads them in the direction of rotation 42 in its end position, not shown, in which the sharpening brackets 20, 22 respectively abut second abutment surfaces 48 of the body 12.
  • the second stop surfaces 48 of Base body 12 are arranged in a manner corresponding to the first stop surface ends 44 on the outer periphery 46 of the base body 12.
  • the second stop surfaces 48 are arranged spaced apart from the first stop surfaces 44. Stop structures for the sharpening, which protrude from the front or back 28, 30 of the body 12, thus unnecessary.
  • the sharpening brackets 20, 22 are each arranged with their two sharpening bracket arms 20a, 20b, 22a, 22b on the base body 12 such that the elastically resilient restoring force is generated by an elastic deformation, in this case a torsion, the sharpening bracket 20, 22 itself. Separate spring elements are unnecessary.
  • the two sharpening brackets 20, 22 When deflecting the sharpening brackets 20, 22 from the rest position in the direction 42 of the second stop surfaces 48 by means of a blade to be sharpened, the two sharpening brackets 20, 22 thus each elastically twisted. As soon as the blade is removed from the sharpening brackets 20, 22, they automatically return to their rest position.
  • the individual sharpening bow arms 20a, 20b, 22a, 22b of a sharpening bow 20, 22 differ in their present surface roughness in the present case.
  • the sharpening arm arms 20a, 20b, 22a, 22b of a sharpening arm 20, 22 have a surface roughness corresponding to one another, while the two sharpening brackets 20a, 20b differ from each other in their respective surface roughnesses.
  • the main body 12 has on both sides of the guide slot 14 cut engagement recesses 50 which are provided for engaging a sharpener 10 holding the hand of an operator.
  • the main body 12 forms two gripping pieces 52 , each having an angled outer edge portion 54. This angled Edge portions 54 each form a hand support surface 56 for a hand of an operator.
  • At wall portions 58 of the engagement recesses 50 ergonomically rounded recessed grips 60 are formed.
  • the base body 12 has on its outer periphery 46 on both sides of the guide slot 14 trough-shaped thumb rest 62 on.
  • a T-shaped mounting flange 64 is arranged with fastener recesses 66 to rigidly attach the sharpening device 10 to a countertop or the like.
  • the dimensions of the sharpener 10 are selected such that the sharpener can be held by a user without difficulty in one hand.
  • the sharpening device 10 is made entirely of stainless steel and hardened at least in the region of the walls 18 of the guide slot 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung betrifft eine Schärfvorrichtung für die Klinge eines Schneidwerkzeugs.The invention relates to a sharpening device for the blade of a cutting tool.

Die Klingen von Schneidwerkzeugen, insbesondere Messern, unterliegen im Gebrauch im Bereich ihrer Schneide einer hohen mechanischen Belastung, durch die die Schneiden ihre Schneidfähigkeit einbüßen, d.h. stumpf werden. In der Praxis müssen die Klingen zum Erhalt ihrer Schneidleistung daher in regelmäßigen Intervallen nachgeschliffen werden. Zwischen derartigen Schleifarbeiten wird die Klinge, insbesondere im professionellen Einsatz, üblicherweise durch Abziehen der Klinge an einem Wetzstahl oder einer Schärfvorrichtung mit gekreuzten Schärfbügeln nachgeschärft. Bei einem solchen Abziehen der Klinge wird ein an der Schnittkante der Schneide ausgebildeter unerwünschter Grat gerichtet, wodurch sich die Schnitthaltigkeit der Klinge spürbar erhöht.The blades of cutting tools, especially knives, are subject in use in the area of their cutting a high mechanical stress, by which the cutting edges lose their cutting ability, ie dull. In practice, the blades must therefore be reground at regular intervals to maintain their cutting performance. Between such grinding work, the blade, especially in professional use, usually resharpened by peeling off the blade on a sharpening steel or a sharpening device with crossed sharpening. With such a removal of the blade, an undesired ridge formed on the cutting edge of the blade is directed, whereby the edge retention of the blade increases noticeably.

Aus der EP 1260 318 B1 , auf der der Oberbegriff von Anspruch 1 basiert, ist eine Schärfvorrichtung mit gekreuzten Schärfbügeln bekannt geworden, die einen plattenförmigen Grundkörper mit einem Führungsschlitz für eine nachzuschärfende Klinge aufweist. Die Schärfbügel sind U-förmig gebogen und beidseits des Führungsschlitzes am Grundkörper angelenkt, so dass die Schärfbügel aus ihrer Ruhelage durch einen Druck einer in den Führungsschlitz eingeführten Klinge relativ zum Grundkörper auslenkbar sind. Die Schärfbügel sind als Torsionsfederelemente ausgebildet und weisen jeweils zwei Schärfbügelarme auf, die an ihrem einen Ende miteinander verbunden sind. Am freien Ende beider Schärfbügelarme eines Schärfbügels sind jeweils Abwinklungen vorgesehen, die Gelenkachsen bilden. Diese Gelenkachsen sind jeweils frei drehbar in zueinander versetzten Einbauöffnungen des Grundkörpers angeordnet, um eine elastische Rückstellung der Schärfbügel durch einen Torsionseffekt zu erreichen.From the EP 1260 318 B1 , on which the preamble of claim 1 is based, a sharpening device with crossed sharpening bars has become known which has a plate-shaped base body with a guide slot for a blade to be resharpened. The sharpening brackets are bent in a U-shape and articulated on both sides of the guide slot on the base body so that the sharpening brackets can be deflected from their rest position by a pressure of a blade inserted into the guide slot relative to the base body. The sharpening brackets are designed as torsion spring elements and each have two sharpening arm arms, which are connected to one another at one end. At the free end of both Schärfbügelarme a sharpening bracket each angled portions are provided which form hinge axes. These joint axes are each freely rotatably arranged in mutually offset installation openings of the base body in order to achieve an elastic recovery of the sharpening by a torsion effect.

Zur Fertigung der vorstehend erläuterten Schärfvorrichtung müssen die freien Enden beider Schärfbügelarme eines Schärfbügels mit Abwinklungen versehen werden. Die Abwinklungen müssen darüber hinaus in dafür vorgesehenen Einbauöffnungen des Grundkörpers montiert werden. Dies ist unter fertigungstechnischen Gesichtspunkten aufwändig und kostenintensiv.For the manufacture of the above-described sharpening device, the free ends of both sharpening arms of a sharpening bracket must be provided with angled portions. The bends must also be mounted in designated mounting openings of the body. This is costly from a production engineering point of view.

Aufgabe der Erfindung ist eine Schärfvorrichtung anzugeben, die die genannten Nachteile des Standes der Technik überwindet.The object of the invention is to provide a sharpening device which overcomes the aforementioned disadvantages of the prior art.

Diese Aufgabe wird durch eine Schärfvorrichtung mit den in Patentanspruch 1 angegebenen Merkmalen gelöst. Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung ergeben sich aus der Beschreibung, den Ansprüchen und der Zeichnung.This object is achieved by a sharpening device with the features specified in claim 1. Further advantages and advantageous embodiments of the subject invention will become apparent from the description, the claims and the drawings.

Bei der erfindungsgemäßen Schärfvorrichtung sind die Schärfbügel mit jeweils nur einem ihrer Schärfbügelarme am Grundkörper angelenkt und mit dem jeweilig anderen Schärfbügelarm am Grundkörper, vorzugsweise ausschließlich abgestützt. Unter Abstützen wird vorliegend auch ein Abstützen mit translatorischen Freiheitsgraden des Schärfbügelarms gegenüber dem Grundkörper verstanden. Dadurch kann die Schärfvorrichtung ohne das Erfordernis einer am Grundkörper einzubringenden Einbauöffnung für die drehbare Lagerung des Schärfbügelarms gefertigt werden. Auch erübrigt sich die ansonsten erforderliche Abwinklung am freien Ende des anderen Schärfbügelarms, die eine Drehachse bildet. Dadurch wird eine vereinfachte Fertigung, Montage der Schärfvorrichtung sowie Justierung der Schärfbügelarme gegenüber dem Führungsschlitz ermöglicht. Dies bietet Zeit- und Kostenvorteile. Die Schärfbügel übegreifen den plattenförmigen Grundkörper jeweils mit ihren beiden Schärfbügelarmen. So ist bei beiden Schärfbügeln jeweils ein Schärfbügelarm an der einen Seite des Grundkörpers angelenkt und der andere Schärfbügelarm des Schärfbügels an der jeweils anderen Seite des Grundkörpers abgestützt. Dadurch kann die Schärfvorrichtung bei einem konstruktiv vereinfachten Aufbau mit einer geringen Bauhöhe realisiert werden. Darüber hinaus ist dies für die Handhabung der Schärfvorrichtung von Vorteil und ermöglicht einen geringeren Platzbedarf der Schärfvorrichtung bei deren Lagerung und Transport. Auch kann dadurch das Risiko einer Verletzung einer Bedienperson durch Strukturen, die übermäßig von der Grundplatte hervorstehen, reduziert werden. Die Arme der Schärfbügel sind dabei vorzugsweise derart am plattenförmigen Grundkörper der Schärfvorrichtung angelenkt, dass diese aus ihrer Ruhestellung berührungsfrei zum Grundkörper auslenkbar sind, d.h., ohne dass diese am Grundkörper schleifen. Dadurch wird während des Schärfprozesses der Klinge eine synchrone Auslenkung der beiden Schärfbügel gegenüber dem Grundkörper der Schärfvorrichtung gewährleistet. Dies ermöglicht ein reproduzierbares und besonders hochwertiges Schärfergebnis der Klinge.In the sharpening device according to the invention, the sharpening brackets are each articulated on the base body with only one of their sharpening arm arms and are preferably supported exclusively on the respective other sharpening arm on the main body. Supporting means in the present case also a support with translatory degrees of freedom of the sharpening arm with respect to the base body. As a result, the sharpening device can be manufactured without the need for a mounting opening for the rotatable mounting of the sharpening arm to be introduced on the main body. Also unnecessary is the otherwise required bend at the free end of the other sharpening arm, which forms an axis of rotation. This allows a simplified production, installation of the sharpening device and adjustment of the sharpening bow arms relative to the guide slot. This offers time and cost advantages. The sharpening brackets extend over the plate-shaped base body with their two sharpening bracket arms. Thus, in each case a sharpening bow arm is hinged on one side of the main body and the other sharpening arm of the sharpening arm is supported on the respective other side of the main body in both sharpening arms. As a result, the sharpening device can be realized in a structurally simplified construction with a low overall height. Moreover, this is for handling the sharpening advantage and allows a smaller footprint of the sharpening device during storage and transport. Also, this may reduce the risk of injury to an operator by structures protruding excessively from the base. The arms of the sharpening arms are preferably articulated to the plate-shaped base body of the sharpening device in such a way that they can be deflected from their rest position without contact to the base body, ie, without them grinding on the base body. As a result, during the sharpening process of the blade, a synchronous deflection of the two sharpening bow against the Ensured basic body of the sharpening device. This allows a reproducible and especially high-quality sharpening result of the blade.

Beide Schärfbügel eines jeweiligen Schärfbügels können erfindungsgemäß gerade verlaufend an ihren freien Enden ausgebildet sein. Dies vereinfacht die Herstellung der erfindungsgemäßen Schärfbügel und auch deren Montage an der Grundplatte. Die Schärfbügel sind am Grundkörper derart angeordnet, dass die elastisch federnde Rückstellkraft durch eine elastische Verformung, insbesondere Torsion, der Schärfbügel erzeugt ist. Die Schärfbügel sind diesbezüglich aus einem Material, beispielsweise einem nichtrostenden Federstahl, mit einer dem Material innewohnenden Elastizität gebildet. Dadurch kehren die aus ihrer Ruhestellung ausgelenkten Schärfbügel ohne bleibende Verformung selbsttätig in ihren Ruhezustand zurück. Die Schärfbügel sind somit jeweils im Sinne eines Torsionsfederelements ausgebildet. Insgesamt kann dadurch eine Anzahl der für die Fertigung der Schärfvorrichtung erforderlichen Bauteile gering gehalten werden. Darüber hinaus ergeben sich dadurch auch unter Hygieneaspekten Vorteile. Zur Abstützung des anderen Schärfbügelarms am Grundkörper genügt ein einfaches linien- oder flächenförmiges Widerlager. Dieses ist vorzugsweise durch einen am Grundkörper angeordneten Bolzen, einen Stift, ein im Querschnitt L-förmiges Profilstück oder dergleichen gebildet. Es versteht sich, dass der Schärfbügelarm am Grundkörper vorzugsweise gegenüber einem unerwünschten Abrutschen von dessen Widerlager gesichert ist.Both sharpening straps of a respective sharpening bow can be designed to run straight at their free ends according to the invention. This simplifies the production of the sharpening bow according to the invention and also its mounting on the base plate. The sharpening brackets are arranged on the base body such that the elastically resilient restoring force is generated by an elastic deformation, in particular torsion, of the sharpening bow. The sharpening brackets are in this respect made of a material, such as a stainless spring steel, formed with a material inherent elasticity. As a result, the sharpening levers deflected out of their rest position automatically return to their idle state without permanent deformation. The sharpening brackets are thus each designed in the sense of a torsion spring element. Overall, a number of the components required for the production of the sharpening device can thereby be kept low. In addition, this also results in hygiene aspects advantages. To support the other sharpening arm on the base body, a simple linear or planar abutment is sufficient. This is preferably formed by a bolt arranged on the base body, a pin, a cross-sectionally L-shaped profile piece or the like. It is understood that the sharpening arm is secured to the body preferably against unwanted slipping of the abutment.

Erfindungsgemäß ist die elastische Rückstellkraft der Schärfbügel vorzugsweise variabel einstellbar. Dadurch kann einerseits ein sehr gleichmäßiges Schärfergebnis der Klinge bezogen auf die beiden Schneiden der zu schärfenden Klinge erreicht werden. Zum Anderen kann dadurch der Schärfeffekt der Schärfeinrichtung bedarfsweise angepasst werden. Im konstruktiv einfachsten Fall ist ein das vorstehend erläuterte Widerlager bildendes Bauteil (Bolzen etc.) am Grundkörper relativ zum Anlenkungspunkt (Drehgelenk) des jeweiligen Schärfbügels verschiebbar angeordnet.According to the invention, the elastic restoring force of the sharpening bow is preferably variably adjustable. As a result, on the one hand, a very uniform sharpening result of the blade relative to the two cutting edges of the blade to be sharpened can be achieved. On the other hand, the sharpness effect of the sharpening device can be adjusted as needed become. In the structurally simplest case, an abutment forming the abovementioned element (bolt, etc.) on the base body relative to the articulation point (rotary joint) of the respective Schärfbügels slidably disposed.

Bekanntlich können während eines Schärfprozesses oder auch bei einer Lagerung bzw. eines Transports der Schärfvorrichtung mitunter hohe Querkräfte an den Schärfbügeln angreifen. Derartige, im Wesentlichen quer bzw. orthogonal zur vom Grundkörper aufgespannten Ebene an den Schärfbügeln angreifenden Kräfte können zu einer Beschädigung von Anlenkungspunkten der Schärfbügel am Grundkörper bzw. der Schärfbügel selbst (Verbiegen) führen. Die Schärfeinrichtung kann dadurch unbrauchbar werden. Da die beiden Schärfbügelarme der Schärfbügel jeweils eine Vorder- und eine Rückseite des Grundkörpers überdecken, können sich die Bügel bei Angriff derartiger Kräfte zumindest abschnittsweise an den Grundkörper anlegen und an diesem abstützen. Diese Bauart der Schärfvorrichtung ist somit gegenüber Beschädigungen besonders robust.As is known, during a sharpening process or even during storage or transport of the sharpening device, high transverse forces can sometimes attack the sharpening bars. Such, acting transversely or orthogonal to the plane spanned by the main body level on the sharpening iron forces can lead to damage of articulation points of the sharpening on the body or the sharpening itself (bending). The sharpening device can become unusable as a result. Since the two sharpening arms of the sharpening arms each cover a front and a rear side of the base body, the brackets can at least partially rest on the base body when attacking such forces and be supported on it. This type of sharpening device is thus particularly robust against damage.

Der Grundkörper der Schärfvorrichtung ist vorzugsweise umfangsseitig mit voneinander beabstandet angeordneten Anschlagflächen für die Schärfbügel versehen. Dadurch kann die Ruhestellung der Schärfbügel sowie deren maximale Auslenkposition gegenüber der Grundkörper definiert werden. Aufgrund der umfangsseitig angeordneten Anschlagflächen entfallen somit Strukturen, die auf der Vorder- bzw. Rückseite der Grundplatte vom Grundkörper aus einer durch diesen aufgespannten Ebene hervorstehen. Dies ist, wie bereits vorstehend erläutert, unter dem Gesichtspunkt der Arbeitssicherheit und einer geringen Bauhöhe der Schärfvorrichtung von Vorteil.The main body of the sharpening device is preferably provided circumferentially with spaced abutment surfaces arranged for the sharpening. As a result, the rest position of the sharpening bow and its maximum deflection position relative to the base body can be defined. Due to the circumferentially arranged abutment surfaces thus eliminates structures that protrude on the front or back of the base plate from the base of a plane defined by this plane. This is, as already explained above, from the point of view of occupational safety and a low overall height of the sharpening advantage.

Zwecks einer einfachen und sicheren Handhabung der Schärfvorrichtung weist der Grundkörper zumindest eine, vorzugsweise zwei, Eingriffsausnehmungen auf. Im Falle zweier Eingriffsöffnungen sind diese vorzugsweise zu jeweils einer Seite der Durchtrittsöffnung des Grundkörpers angeordnet. Dadurch kann der Grundkörper von links- und rechtshändigen Bedienpersonen gleichermaßen benutzt werden. Darüber hinaus kann die Schärfvorrichtung dadurch in zwei Arbeitsstellungen, d.h. mit dem Bediener zugewandter Vorder- oder Rückseite des Grundkörpers, eingesetzt werden. Dies ist insbesondere bei Einsatz von Schärfbügeln, deren Schärfbügelarme sich in ihrer Oberflächenrauhigkeit unterscheiden, von Vorteil, da die zu schärfende Klinge so selektiv an den für ein gewünschtes Bearbeitungsergebnis vorgesehenen Schärfbügelarmen abgezogen (entlanggeführt) werden kann.For the purpose of a simple and safe handling of the sharpening device, the base body has at least one, preferably two, engagement recesses. In the case of two engagement openings, these are preferably arranged in each case on one side of the passage opening of the base body. As a result, the body of left and right-handed operators are used equally. In addition, the sharpening device can thereby be placed in two working positions, i. with the operator facing the front or back of the body can be used. This is particularly advantageous when using sharpening arms whose sharpening bow arms differ in their surface roughness, since the blade to be sharpened can be selectively pulled off (pulled along) along the sharpening arm arms provided for a desired machining result.

Die Eingriffsausnehmung ist für eine besonders ergonomische und sichere Handhabung vorzugsweise von einem Wandabschnitt des Grundkörpers begrenzt, der mit Griffmulden versehen ist. Die Griffmulden sind vorteilhafter Weise ergonomisch gerundet ausgeführt.The engagement recess is preferably limited for a particularly ergonomic and safe handling of a wall portion of the body, which is provided with recessed grips. The recessed grips are advantageously designed ergonomically rounded.

In der Praxis hat es sich als besonders vorteilhaft erwiesen, wenn der Grundkörper zumindest einen, vorzugsweise zwei, Griffabschnitte aufweist. Die Griffabschnitte weisen vorzugsweise einen abgewinkelten Randbereich auf, der eine Handauflage bildet. Dadurch kann der Handhabungskomfort und die Bediensicherheit der Schärfvorrichtung nochmals weiter gesteigert werden und der Grundkörper kann bezüglich seiner Materialdicke besonders dünn gehalten seinIn practice, it has proved to be particularly advantageous if the base body has at least one, preferably two, handle portions. The grip sections preferably have an angled edge region, which forms a hand rest. As a result, the ease of handling and operating safety of the sharpening device can be increased even further and the base body can be kept particularly thin with respect to its material thickness

Zur ortsfesten Montage der Schärfeinrichtung, beispielsweise an einer Arbeitsplatte, ist der Grundkörper vorzugsweise mit einer Befestigungseinrichtung versehen. Die Befestigungseinrichtung kann insbesondere einen zungenförmigen bzw. flanschartigen Befestigungsfortsatz aufweisen. Der Befestigungsfortsatz kann zwecks einer verdrehsicheren Montage der Schärfvorrichtung an einer Unterlage erfindungsgemäß Ausnehmungen für Befestigungsmittel, wie etwa Bolzen und/oder Schrauben, aufweisen.For stationary mounting of the sharpening device, for example on a worktop, the base body is preferably provided with a fastening device. The fastening device can In particular, have a tongue-shaped or flange-like attachment extension. The fastening extension can, according to the invention, have recesses for fastening means, such as bolts and / or screws, for the purposes of a rotationally secure mounting of the sharpening device on a base.

Der Grundkörper und die Schärfbügel sind ganz besonders bevorzugt aus einem rostfreien Edelstahl gefertigt. Dadurch kann die Schärfvorrichtung auch in korrosiven Umgebungen eingesetzt werden, ohne Schaden zu nehmen. Zudem kann dadurch auch sehr hohen hygienischen Standards, wie diese beispielsweise in lebensmittelverarbeitenden Betrieben, wie beispielsweise (Groß-)Küchen, Schlachtereien und dergl. gelten, auf einfache Weise Rechnung getragen werden. Edelstahl bietet gegenüber Kunststoffen bekanntlich Vorteile hinsichtlich der Anhaftung von Bakterien sowie der Bildung unerwünschter Biofilme. Darüber hinaus wird die Stabilität der genannten Schärfvorrichtung erhöht.The main body and the sharpening bow are most preferably made of a stainless steel. This allows the sharpener to be used in corrosive environments without being damaged. In addition, very high hygienic standards, such as those applied in food processing plants, such as (large) kitchens, butcheries and the like, can be easily taken into account. Stainless steel offers advantages over plastics in terms of adhesion of bacteria and the formation of unwanted biofilms. In addition, the stability of said sharpening device is increased.

Der Grundkörper ist zwecks einer nochmals verbesserten Langlebigkeit der Schärfvorrichtung vorzugsweise im Bereich seiner den Führungsschlitz begrenzenden Wandungen gehärtet, insbesondere nitriergehärtet.For the purpose of a further improved durability of the sharpening device, the main body is preferably hardened in the region of its walls bounding the guide slot, in particular nitrided.

Die Erfindung betrifft eine Schärfvorrichtung für die Klinge eines Schneidwerkzeugs, mit einem plattenförmigen Grundkörper, der einen Führungsschlitz für eine zu schärfende Klinge aufweist. Am Grundkörper sind beidseitig des Führungsschlitzes Schärfbügel verschwenkbar angelenkt. Die Schärfbügel weisen jeweils zwei Schärfbügelarme auf, die einenends miteinander verbunden sind, wobei die Schärfbügel aus ihrer jeweiligen Ruhelage durch einen Druck der in den Führungsschlitz eingeführten Klinge gegen eine elastisch federnde Rückstellkraft verschwenkbar sind, die durch eine elastische Verformung, insbesondere Torsion, der Schärfbügel erzeugt ist. Die Schärfbügel sind erfindungsgemäß mit jeweils nur einem ihrer Schärfbügelarme unter Anlage am Grundkörper angelenkt und mit dem jeweils anderen Schärfbügelarm ausschließlich am Grundkörper abgestützt.The invention relates to a sharpening device for the blade of a cutting tool, with a plate-shaped base body having a guide slot for a blade to be sharpened. On the main body sharpening arms are pivotally hinged on both sides of the guide slot. The sharpening brackets each have two sharpening arm arms, which are connected to one another at one end, wherein the sharpening brackets can be pivoted from their respective rest position by a pressure of the inserted into the guide slot blade against an elastically resilient restoring force, by an elastic deformation, in particular Twist generated sharpening strap. According to the invention, the sharpening brackets are articulated with only one of their sharpening arm arms under contact with the main body and supported with the respective other sharpening arm exclusively on the main body.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung wiedergegebenen Ausführungsbeispiels näher erläutert. Die gezeigte und beschriebene Ausführungsform ist nicht als abschließende Aufzählung zu verstehen, sondern hat vielmehr für die Schilderung der Erfindung beispielhaften Charakter. Die Figuren der Zeichnung zeigen den erfindungsgemäßen Gegenstand stark schematisiert und sind nicht maßstäblich zu verstehen.The invention will be explained in more detail with reference to an embodiment shown in the drawing. The embodiment shown and described is not meant to be exhaustive, but rather illustrative of the description of the invention. The figures of the drawing show the subject matter according to the invention in a highly schematized manner and are not to be understood to scale.

In der Zeichnung zeigen:

Fig. 1:
eine erfindungsgemäße Schärfvorrichtung für die Klinge eines nicht näher wiedergegebenen Schneidwerkzeugs, in Vorderansicht; und
Fig. 2
die Schärfvorrichtung aus Fig.1 in einem Längsschnitt entlang der in Fig. 1 mit A-A bezeichneten Schnittlinie.
In the drawing show:
Fig. 1:
a sharpening device according to the invention for the blade of a cutting tool not shown in detail, in front view; and
Fig. 2
the sharpening device Fig.1 in a longitudinal section along the in Fig. 1 with AA designated cutting line.

Fig. 1 zeigt eine erfindungsgemäße Schärfvorrichtung 10 für die Klinge eines nicht näher wiedergegebenen Schneidwerkzeugs. Die Schärfvorrichtung 10 weist einen plattenförmigen Grundkörper 12 auf, der mit einem als Einschnitt im Grundkörper 12 ausgebildeten Führungsschlitz 14 für die zu schärfende Klinge des Schneidwerkzeugs versehen ist. Der Führungsschlitz 14 erstreckt sich von seinem Eintrittsbereich 16 nahezu über die gesamte Längenerstreckung L des Grundkörpers 12 und wird von zwei sich gegenüberliegenden Wandungen 18 des Grundkörpers 12 ausgebildet. Im Eintrittsbereich 16 ist der Führungsschlitz 14 trichterförmig aufgeweitet bzw. verbreitert, um das Einführen einer zu schärfenden Klinge zu erleichtern. Fig. 1 shows a sharpening device 10 according to the invention for the blade of a cutting tool not shown in detail. The sharpening device 10 has a plate-shaped base body 12 which is provided with a formed as an incision in the base body 12 guide slot 14 for the blade to be sharpened of the cutting tool. The guide slot 14 extends from its inlet region 16 almost over the entire longitudinal extension L of the base body 12 and is formed by two opposing walls 18 of the main body 12 educated. In the entry region 16, the guide slot 14 is widened or widened funnel-shaped in order to facilitate the insertion of a blade to be sharpened.

Am Grundkörper 12 sind beiderseits des Führungsschlitzes 14 im Wesentlichen U-förmig gebogene Schärfbügel 20, 22 angelenkt, die sich in einem den Führungsschlitz 14 überdeckenden Kreuzungspunkt 24 kreuzen. Die beiden Schärfbügel 20, 22 sind im Wesentlichen spiegelbildlich zum Führungsschlitz 14 angeordnet und formgleich.On the base body 12 are on both sides of the guide slot 14 substantially U-shaped curved Schärfbügel 20, 22 hinged, which intersect in a guide slot 14 overlapping crossing point 24 . The two sharpening brackets 20, 22 are arranged substantially mirror-inverted to the guide slot 14 and the same shape.

In Fig. 2 ist die Schärfvorrichtung in einem entlang der in Fig. 1 mit A-A bezeichneten Schnittlinie geführten Längsschnitt wiedergegeben. Wie aus dieser Darstellung hervorgeht, weisen die beiden Schärfbügel 20, 22 jeweils zwei Schärfbügelarme 20a, 20b, 22a, 22b auf, die einenends jeweils über einen gebogenen Rückenabschnitt 26 der Schärfbügel 20, 22 miteinander verbunden sind.In Fig. 2 is the sharpening device in one along the in Fig. 1 reproduced with AA designated section line guided longitudinal section. As can be seen from this illustration, the two sharpening brackets 20, 22 each have two sharpening arm arms 20a, 20b, 22a, 22b , which are connected to each other at one end via a curved back section 26 of the sharpening brackets 20, 22.

Die beiden Schärfbügel 20, 22 umgreifen jeweils den Grundkörper 12 der Schärfvorrichtung 10 mit ihren jeweiligen Schärfbügelarmen 20a, 20b, 22a, 22b. D.h., vorliegend überdeckt jeweils ein Schärfbügelarm 20a, 22a den Grundkörper 12 an dessen Vorderseite 28, während ein anderer Schärfbügelarm 20b, 22b der Schärfbügel 20, 22 den Grundkörper 12 jeweils an dessen Rückseite 30 überdeckt.The two sharpening brackets 20, 22 each encompass the main body 12 of the sharpening device 10 with their respective sharpening arm arms 20a, 20b, 22a, 22b. In other words, in this case one sharpening arm 20a, 22a respectively covers the main body 12 at its front side 28, while another sharpening arm 20b, 22b of the sharpening arm 20, 22 covers the main body 12 respectively at its rear side 30 .

Wie aus den Fign. 1 und 2 hervorgeht, sind die beiden Schärfbügel 20, 22 mit einem freien und gerade verlaufenden Endabschnitt 32 nur einer ihrer Schärfbügelarme 20a, 20b, 22a, 22b über Befestigungsmittel 34 an Anlenkpunkten 36 des Grundkörpers 12 drehgelagert. Dies sind vorliegend die Schärfbügelarme 20a und 22b. Die freien Endabschnitte 32 dieser beiden Schärfbügelarme 20a, 22b sind nicht abgewinkelt und erstrecken sich in die Befestigungsmittel 34 hinein, in denen sie festgeklemmt sind.Like from the FIGS. 1 and 2 As can be seen, the two sharpening brackets 20, 22 with a free and straight end section 32 of only one of their sharpening arm arms 20a, 20b, 22a, 22b are rotatably mounted via attachment means 34 at articulation points 36 of the base body 12. In the present case, these are the sharpening arm arms 20a and 22b. The free end portions 32 of these two sharpening arms 20a, 22b are not angled and extend into the fasteners 34, in which they are clamped.

Die Befestigungsmittel 34 erstrecken sich durch nicht näher wiedergegebene Befestigungsmittelausnehmungen des Grundkörpers 12 und sind in diesen zusammen mit dem jeweiligen Schärfbügel 20, 22 gegenüber dem Grundkörper 12 verschwenkbar, d.h. die Befestigungsmittel 34 sind drehbar in dem Grundkörper 12 gelagert.The fastening means 34 extend through Befestigungsmittelausnehmungen not shown in detail of the base body 12 and are pivotable in this together with the respective sharpening bow 20, 22 relative to the base body 12, i. the fastening means 34 are rotatably mounted in the base body 12.

Wie aus den Fign. 1 und 2 weiter hervorgeht, sind die Schärfbügel 20, 22 mit einem freien und gerade verlaufenden Endabschnitt 32 ihres jeweilig anderen Schärfbügelarms 20b, 22a lediglich an einem Profilvorsprung 38 des Grundkörpers 12 abgestützt. D.h., die freien Enden 32 der Schärfbügelarme 20b, 22a sind hier mit dem Grundkörper 12 nicht drehgelenkig verbunden. Die Profilvorsprünge 38 dienen jeweils als ein Widerlager für die Endabschnitte 32 des Schärfbügelarms 20b und des Schärfbügelarms 22a. Diese beiden Schärfbügelarme 20b und 22a liegen an den Profilvorsprüngen 38 jeweils lose an.Like from the FIGS. 1 and 2 Furthermore, the sharpening brackets 20, 22 are supported with a free and straight end portion 32 of their respective other sharpening arm 20b, 22a only on a profile projection 38 of the base body 12. That is, the free ends 32 of the sharpening bow arms 20b, 22a are not pivotally connected to the base body 12 here. The profile projections 38 each serve as an abutment for the end portions 32 of the sharpening arm 20b and the sharpening arm 22a. These two sharpening bow arms 20b and 22a rest loosely against the profile projections 38.

Der Schärfbügel 20 ist somit mit seinem Schärfbügelarm 20a an der Vorderseite 28 des Grundkörpers 12 im Anlenkpunkt 36 drehbeweglich am Grundkörper 12 angelenkt. Der andere Schärfbügelarm 20b des Schärfbügels 20 ist demgegenüber an der Rückseite 30 des Grundkörpers an dem in Fig. 2 gezeigten Profilvorsprung 38 abgestützt.The sharpening bow 20 is thus articulated with its sharpening arm 20 a on the front side 28 of the base body 12 in the pivot point 36 rotatably on the base body 12. The other sharpening bow arm 20b of the sharpening bow 20, in contrast, on the rear side 30 of the main body on the in Fig. 2 supported profile projection 38 supported.

Der Schärfbügel 22 ist mit seinem rückwärtigen Schärfbügelarm 22b auf der Rückseite 30 des Grundkörpers 12 an dem in der Fig 1 links dargestellten Anlenkpunkt 36 drehbeweglich am Grundkörper 12 angelenkt und mit seinem Schärfbügelarm 22a an der Vorderseite 28 des Grundkörpers 12 an dem in Fig. 1 gezeigten Profilvorsprung 38 des Grundkörpers 12 abgestützt.The sharpening bracket 22 is with its rear sharpening bow arm 22 b on the back 30 of the base body 12 at the in the Fig. 1 hinged point 36 shown pivotally hinged on the base body 12 and with its sharpening arm 22a on the front 28 of the Base 12 at the in Fig. 1 shown profile projection 38 of the body 12 supported.

Die Profilvorsprünge 38 stehen von der Vorderseite 28 bzw. der Rückseite 30 des Grundkörpers 12 über dessen Vorder- bzw. Rückseite 28, 30 hervor und sind zu den dazu korrespondierenden Anlenkpunkten 36 der jeweiligen Schärfbügel 20, 22 am Grundkörper 12 versetzt angeordnet. Die Profilvorsprünge 38 sind vorliegend mit dem Grundkörper 12 verschweißt. Nach einer alternativen Ausführungsform können die Profilvorsprünge 38 auch aus dem Material des Grundkörpers 12 freigestanzt und formgebogen sein. Nach einem weiteren Ausführungsbeispiel können die Profilvorsprünge 38 auch durch zu dem Grundkörper 12 separate Bauelemente gebildet sein, die sich durch eine Ausnehmung des Grundkörpers 12 hindurcherstrecken und welche mit dem Grundkörper 12 drehfest verbunden sein können.The profile projections 38 project from the front side 28 and the rear side 30 of the main body 12 beyond the front and rear sides 28, 30 thereof and are offset relative to the corresponding articulation points 36 of the respective sharpening brackets 20, 22 on the main body 12. The profile projections 38 are welded to the base body 12 in the present case. According to an alternative embodiment, the profile projections 38 can also be punched out of the material of the base body 12 and bent in shape. According to a further embodiment, the profile projections 38 may also be formed by separate to the main body 12 components which extend through a recess of the base body 12 and which may be rotatably connected to the main body 12.

Die Schärfbügel 20, 22 sind durch einen in Pfeilrichtung 40 gerichteten Druck einer in den Führungsschlitz 14 eingeführten Klinge aus ihrer gezeigten Ruhelage gegen eine elastisch federnde Rückstellkraft relativ zum Grundkörper 12 in eine mit Pfeilen 42 bezeichnete Drehrichtung gegenüber dem Grundkörper 12 verschwenkbar. Die Schärfbügel 20, 22 liegen in ihrer gezeigten Ruhelage mit ihren gebogenen Rückenabschnitten 26 an ersten Anschlagflächen 44 des Grundkörpers 12 an, die an dessen äußerem Umfang 46 ausgebildet sind.The sharpening pins 20, 22 are pivotable by a directed in the direction of arrow 40 pressure of an inserted into the guide slot 14 blade from its shown rest position against a resiliently elastic restoring force relative to the body 12 in a direction indicated with arrows 42 the direction of rotation relative to the base body 12th The sharpening brackets 20, 22 are in their shown rest position with their curved back portions 26 on the first stop surfaces 44 of the body 12, which are formed on the outer periphery 46 .

Eine entlang des Führungsschlitzes 14 geführte Klinge trifft somit im Bereich des Kreuzungspunktes 24 auf die Schärfbügel 20a, 20b und führt diese in Drehrichtung 42 in ihre nicht gezeigte Endstellung, in der die Schärfbügel 20, 22 jeweils an zweiten Anschlagflächen 48 des Grundkörpers 12 anliegen. Die zweiten Anschlagflächen 48 des Grundkörpers 12 sind in einer zu den ersten Anschlagflächenden 44 entsprechenden Weise am äußeren Umfang 46 des Grundkörpers 12 angeordnet. Die zweiten Anschlagflächen 48 sind dabei von den ersten Anschlagflächen 44 jeweils beabstandet angeordnet. Anschlagstrukturen für die Schärfbügel, die von der Vorder- oder Rückseite 28, 30 des Grundkörpers 12 wegstehen, erübrigen sich somit.A guided along the guide slot 14 blade thus meets in the region of the intersection point 24 on the sharpening 20a, 20b and leads them in the direction of rotation 42 in its end position, not shown, in which the sharpening brackets 20, 22 respectively abut second abutment surfaces 48 of the body 12. The second stop surfaces 48 of Base body 12 are arranged in a manner corresponding to the first stop surface ends 44 on the outer periphery 46 of the base body 12. The second stop surfaces 48 are arranged spaced apart from the first stop surfaces 44. Stop structures for the sharpening, which protrude from the front or back 28, 30 of the body 12, thus unnecessary.

Die Schärfbügel 20, 22 sind mit ihren beiden Schärfbügelarmen 20a, 20b, 22a, 22b jeweils derart am Grundkörper 12 angeordnet, dass die elastisch federnde Rückstellkraft durch eine elastische Verformung, hier eine Torsion, der Schärfbügel 20, 22 selbst erzeugt ist. Separate Federelemente erübrigen sich. Bei einem Auslenken der Schärfbügel 20, 22 aus der Ruhelage in Richtung 42 der zweiten Anschlagflächen 48 mittels einer zu schärfenden Klinge werden die beiden Schärfbügel 20, 22 somit jeweils elastisch tordiert. Sobald die Klinge von den Schärfbügeln 20, 22 entfernt wird, kehren diese selbsttätig in ihre Ruhelage zurück.The sharpening brackets 20, 22 are each arranged with their two sharpening bracket arms 20a, 20b, 22a, 22b on the base body 12 such that the elastically resilient restoring force is generated by an elastic deformation, in this case a torsion, the sharpening bracket 20, 22 itself. Separate spring elements are unnecessary. When deflecting the sharpening brackets 20, 22 from the rest position in the direction 42 of the second stop surfaces 48 by means of a blade to be sharpened, the two sharpening brackets 20, 22 thus each elastically twisted. As soon as the blade is removed from the sharpening brackets 20, 22, they automatically return to their rest position.

Die einzelnen Schärfbügelarme 20a, 20b, 22a, 22b eines Schärfbügels 20, 22 unterscheiden sich vorliegend in ihrer jeweiligen Oberflächenrauhigkeit. Nach einem alternativen Ausführungsbeispiel weisen die Schärfbügelarme 20a, 20b, 22a, 22b eines Schärfbügels 20, 22 eine zueinander entsprechende Oberflächenrauhigkeit auf, während sich die beiden Schärfbügel 20a, 20b in ihrer jeweiligen Oberflächenrauhigkeit voneinander unterscheiden.The individual sharpening bow arms 20a, 20b, 22a, 22b of a sharpening bow 20, 22 differ in their present surface roughness in the present case. According to an alternative embodiment, the sharpening arm arms 20a, 20b, 22a, 22b of a sharpening arm 20, 22 have a surface roughness corresponding to one another, while the two sharpening brackets 20a, 20b differ from each other in their respective surface roughnesses.

Der Grundkörper 12 weist zu beiden Seiten des Führungsschlitzes 14 freigeschnittene Eingriffsausnehmungen 50 auf, die zum Eingreifen einer die Schärfvorrichtung 10 haltenden Hand einer Bedienperson vorgesehen sind. Der Grundkörper 12 bildet zwei Griffstücke 52 mit jeweils einem abgewinkelten äußeren Randabschnitt 54. Diese abgewinkelten Randabschnitte 54 bilden jeweils eine Handauflagefläche 56 für eine Hand einer Bedienperson. An Wandabschnitten 58 der Eingriffsausnehmungen 50 sind ergonomisch gerundete Griffmulden 60 ausgebildet. Der Grundkörper 12 weist an seinem äußeren Umfang 46 beidseits des Führungsschlitzes 14 muldenförmig ausgeformte Daumenauflagen 62 auf.The main body 12 has on both sides of the guide slot 14 cut engagement recesses 50 which are provided for engaging a sharpener 10 holding the hand of an operator. The main body 12 forms two gripping pieces 52 , each having an angled outer edge portion 54. This angled Edge portions 54 each form a hand support surface 56 for a hand of an operator. At wall portions 58 of the engagement recesses 50 ergonomically rounded recessed grips 60 are formed. The base body 12 has on its outer periphery 46 on both sides of the guide slot 14 trough-shaped thumb rest 62 on.

An einem von dem Eintrittsbereich 16 des Führungsschlitzes 14 abgewandten (unteren) Ende des Grundkörpers 12 ist ein T-förmiger Befestigungsflansch 64 mit Ausnehmungen 66 für Befestigungsmittel angeordnet, um die Schärfvorrichtung 10 an einer Arbeitsplatte oder dergl. starr anzuordnen.At a (bottom) of the base body 12 facing away from the entry region 16 of the guide slot 14, a T-shaped mounting flange 64 is arranged with fastener recesses 66 to rigidly attach the sharpening device 10 to a countertop or the like.

Die Ausmaße der Schärfvorrichtung 10 sind derart gewählt, dass die Schärfvorrichtung von einem Benutzer ohne Mühe in einer Hand gehalten werden kann. Die Schärfvorrichtung 10 ist insgesamt aus rostfreiem Edelstahl gefertigt und zumindest im Bereich der Wandungen 18 des Führungsschlitzes 14 gehärtet.The dimensions of the sharpener 10 are selected such that the sharpener can be held by a user without difficulty in one hand. The sharpening device 10 is made entirely of stainless steel and hardened at least in the region of the walls 18 of the guide slot 14.

Die Erfindung beschränkt sich nicht auf die vorstehend angegebenen Ausführungsbeispiele. Vielmehr sind Varianten denkbar, welche auch bei grundsätzlich anders gearteter Ausführung von den Merkmalen der Erfindung Gebrauch machen.The invention is not limited to the embodiments given above. Rather, variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.

Claims (9)

  1. Sharpening device (10) for the blade of a cutting tool, comprising a plate-shaped base body (12), which has a guide slot (14) for a blade to be sharpened, and sharpening brackets (20, 22) which are pivotably mounted on the base body (12) on both sides of the guide slot (14) and cross one another,
    wherein the sharpening brackets (20, 22) each comprise two sharpening bracket arms (20a, 20b, 22a, 22b) which are connected to each other at one end,
    wherein the sharpening brackets (20, 22) can be pivoted out of their respective rest positions against an elastically resilient restoring force by means of a pressure exerted by the blade which has been introduced into the guide slot (14), and
    wherein the elastically resilient restoring force is generated through elastic deformation, in particular torsion, of the sharpening brackets (20, 22),
    characterized in that
    each sharpening bracket (20, 22) grips around the base body (12) with both of its sharpening bracket arms (20a, 20b, 22a, 22b), wherein each sharpening bracket (20, 22) is pivotably mounted to the base body (12) with only one of its sharpening bracket arms (20a, 20b; 22a, 22b), with the other respective sharpening bracket arm (20a, 20b; 22a, 22b) only supporting the sharpening bracket (20, 22) on the base body (12).
  2. Sharpening device according to claim 1, characterized in that the elastically resilient restoring force can be variably adjusted.
  3. Sharpening device according to claim 1 or 2, characterized in that the base body comprises on its circumferential side first and/or second stop surfaces (44, 48) for the sharpening brackets (20, 20).
  4. Sharpening device according to any one of the preceding claims, characterized in that the base body (12) comprises at least one, preferably two, grip openings (50).
  5. Sharpening device according to claim 4, characterized in that each of the at least one grip openings (50) is delimited by a wall section (58) which is provided with recessed grips (60).
  6. Sharpening device according to any one of the preceding claims, characterized in that the base body (12) has a gripping section (52) with an angled edge area (54), wherein the edge area (54) forms a hand rest surface (56).
  7. Sharpening device according to any one of the preceding claims, characterized in that the outer circumference (46) of the base body (12) is provided with at least one trough-shaped support for a thumb.
  8. Sharpening device according to any one of the preceding claims, characterized in that the base body (12) has a mounting flange (64) which is preferably provided with recesses (66).
  9. Sharpening device according to any one of the preceding claims, characterized in that the overall sharpening device (10) is manufactured from stainless steel.
EP12759131.1A 2011-09-22 2012-09-14 Sharpening device Active EP2758211B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110083177 DE102011083177A1 (en) 2011-09-22 2011-09-22 sharpener
PCT/EP2012/068033 WO2013041450A1 (en) 2011-09-22 2012-09-14 Sharpening device

Publications (2)

Publication Number Publication Date
EP2758211A1 EP2758211A1 (en) 2014-07-30
EP2758211B1 true EP2758211B1 (en) 2015-11-04

Family

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Application Number Title Priority Date Filing Date
EP12759131.1A Active EP2758211B1 (en) 2011-09-22 2012-09-14 Sharpening device

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EP (1) EP2758211B1 (en)
DE (1) DE102011083177A1 (en)
WO (1) WO2013041450A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023123677A1 (en) * 2023-09-04 2025-03-06 David Meyn device for sharpening a fishing hook

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2824770B1 (en) * 2001-05-18 2003-10-03 Bobet Materiel APPARATUS FOR SHARPENING BLADES OF SHARP TOOLS

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DE102011083177A1 (en) 2013-03-28
EP2758211A1 (en) 2014-07-30
WO2013041450A1 (en) 2013-03-28

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