EP1980364B1 - Verbesserte Messerschärfvorrichtung - Google Patents

Verbesserte Messerschärfvorrichtung Download PDF

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Publication number
EP1980364B1
EP1980364B1 EP08007179A EP08007179A EP1980364B1 EP 1980364 B1 EP1980364 B1 EP 1980364B1 EP 08007179 A EP08007179 A EP 08007179A EP 08007179 A EP08007179 A EP 08007179A EP 1980364 B1 EP1980364 B1 EP 1980364B1
Authority
EP
European Patent Office
Prior art keywords
knife
sharpening device
knife sharpening
blade
grinding wheel
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
EP08007179A
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English (en)
French (fr)
Other versions
EP1980364A1 (de
Inventor
Patrizio Fazzini
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.)
Fazzini Technology Di Ing Patrizio Fazzini & Csas
Original Assignee
Fazzini Technology Di Ing Patrizio Fazzini & Csas
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Publication date
Application filed by Fazzini Technology Di Ing Patrizio Fazzini & Csas filed Critical Fazzini Technology Di Ing Patrizio Fazzini & Csas
Publication of EP1980364A1 publication Critical patent/EP1980364A1/de
Application granted granted Critical
Publication of EP1980364B1 publication Critical patent/EP1980364B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives

Definitions

  • the present invention relates to a knife sharpening device, having particular functional and constructional features.
  • Such prior knife sharpening devices conventionally comprise one or more grinding wheels, which are rotatively driven to remove a desired amount of material from the cutting edge of a knife or scissors pair, thereby recovering the sharpness of the cutter edge.
  • the aim of the invention is to overcome the above mentioned drawbacks, by providing a knife or blade sharpening device, in which it is possible to precisely adjust the location of the blade to be sharpened, without causing said blade from being undesirable miss-displaced.
  • a main object of the invention is to provide such a knife or blade sharpening device which is very safe and reliable in operation.
  • Another object of the present invention is to provide such a knife or blade sharpening device which, in addition to being operatively safe, can also be easily obtained starting from easily available elements and materials.
  • Yet another object of the present invention is to provide such a knife or blade sharpening device which is very competitive from a mere economic standpoint.
  • the knife or blade sharpening device which has been generally indicated by the reference number 1, comprises a supporting plate 2 including a plurality of recesses or seats 3 for housing therein bearings 4 of small shafts 5, which are arranged in an adjoining relationship and are respectively coupled to a first and second grinding wheels 7 and 8 for grinding the knives, and a third grinding wheel 9 for grinding scissors.
  • the knife counter-rotating sharpening grinding wheels have a helical contour; however, they could also have a flat contour, and being made of steel coated by an abrading material, such as a diamond material, CBN, ceramics materials or the like.
  • the toothed pulleys 10 are coupled to the shafts 5 by a fixed joint type of coupling, moreover, the shafts are free of any shoulders, since the grinding wheel locking system, and the grinding wheel thereof, are so arranged and designed as to prevent any cross displacement from occurring; between the grinding wheel and corresponding bearing, a spacer ring element is arranged.
  • Said shafts 5 are coupled, at a respective end portion thereof, to toothed pulleys, generally indicated by the reference number 10, thereon a double toothed belt 11 is entrained, said belt being further entrained on a driving pulley 12.
  • the belt 11 is so entrained on the pulleys as to provide a mutual counter-rotating movement of said grinding wheels 7 and 8.
  • the knife sharpening counter-rotating grinding wheels may have either a helical or flat contour and they are preferably made of steel, coated by an abrading material such as diamond, CBN, ceramics material or the like.
  • Cubic Boron Nitride or CBN is herein used.
  • the driving pulley 12 is coupled to a driving motor 13 by an adjustable supporting ring nut 14, which comprises a fulcrum point 15 for coupling to the supporting plate 2 and two supporting screws 16, engaged in elongated slots 17 formed circumferentially, and with the center thereof arranged at said fulcrum point 15, thereby properly tensioning the belt, to prevent the latter from undesirably slipping.
  • the knife sharpening device comprises moreover a housing body, indicated by the reference number 20, which is provided, at a front portion thereof, with a slot 21 for engaging therein a knife blade to be sharpened, said blade being arranged between the counter-rotating grinding wheels 7 and 8.
  • the housing body supports a bridge element 30 which in turn slidably supports a slider element 31 coupled to a guide rod element 32, for providing a proper guiding with respect to the bridge 30.
  • Said bridge 30 is terminated by a recessed end piece 33, allowing to properly guide said blade, while holding it at a precise position between the grinding wheels.
  • the recessed end piece 33 can also be replaced by a small wheel element.
  • a scissors sharpening slot 40 allowing to properly locate the scissors pair to be sharpened, is arranged.
  • a reference plate 50 for locating the scissors blade cutting edge with a proper angle.
  • the invention provides a knife sharpening device allowing to perfectly guide the knife blade during the sharpening operations, while allowing said blade to be properly and accurately located, thereby preventing said blade and the operator from being damaged.
  • the used materials provided that they are compatible to intended use, as well as the contingent size and shapes, can be any, depending on requirements.

Landscapes

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

Claims (12)

  1. Messerschärfvorrichtung (1), umfassend ein Paar angrenzender und gegenläufiger Schleifscheiben (7, 8), die in einem Gehäusekörper (20) eingefasst sind, wobei der Gehäusekörper (20) zumindest einen Schlitz (21) zur Ineingriffnahme einer Messerklinge, die geschärft werden soll, darin definiert, wobei dem Gehäusekörper eine Klingenführungsvorrichtung (30) zugeordnet ist, dadurch gekennzeichnet, dass die Klingenführungsvorrichtung (30) ein Brückenelement (30) umfasst, das an den Gehäusekörper (20) gekuppelt ist und ein Gleitelement (31) gleitbar stützt, welches durch eine Verbindungsstange (32) mit dem Brückenelement (30) verbunden ist, wobei das Gleitelement (31) an einer Unterseite davon entweder ein ausgespartes Endstück (33) oder ein kleines Treibrad zur Ineingriffnahme eines Rückenabschnitts einer Messerklinge, die geschärft werden soll, aufweist.
  2. Messerschärfvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schärfvorrichtung (1) eine Stützplatte (2) mit mehreren Aussparungen (3) zum Einfassen von Lagerelementen (4) darin zum Stützen der Wellen (5) von zumindest der ersten (7) und zweiten (8) Schleifscheibe umfasst, wobei an die Wellen (5) Zahnriemenscheiben (10) gekuppelt sind, die einen doppelten Zahnriemen (11) mitnehmen, um zu bewirken, dass die Schleifscheiben (9, 8) in entgegengesetzte Richtungen gedreht werden.
  3. Messerschärfvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schärfvorrichtung (1) eine einen Antriebsmotor (4) stützende Ringmutter (14) umfasst, die eine Antriebsscheibe antreibt, wobei die Ringmutter (14) an einem Punkt davon mit der Stützplatte (2) gelenkig verbunden ist und durch Verbindungsschrauben (16) verbunden ist, die in Eingriffsschlitzen (17) mit einer Mitte in einer Hebelpunktanordnung (15) in Eingriff genommen sind.
  4. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schärfvorrichtung (1) eine dritte Schleifscheibe (9) umfasst, die zum Schärfen von Scheren an die erste (7) und zweite (8) Schleifscheibe angrenzt.
  5. Messerschärfvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Schärfvorrichtung (1) einen Scherenschlitz (40) umfasst, der an der dritten Schleifscheibe (9) angeordnet ist.
  6. Messerschärfvorrichtung nach Anspruch 1 und 5, dadurch gekennzeichnet, dass die Vorrichtung (1) einen Querschlitz (60) umfasst, der zum Anordnen von Scherenblättern, die durch die erste Schleifscheibe (7) geschärft werden sollen, an den Messerschärfschlitz (21) angrenzt.
  7. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das ausgesparte Endstück (33) und das kleine Treibrad abnehmbar und austauschbar sind.
  8. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Führungsstange (32) eine Druckfeder zum leichten Drücken des ausgesparten Endstücks (33) auf einen Rückenabschnitt des Messers stützt.
  9. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an dem Scherenschärfschlitz (40) eine Bezugsplatte (50) zum Anordnen der Scherenblattschneidkante mit einem Einstellwinkel angeordnet ist.
  10. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zahnriemen (10) durch eine Kupplung mit starrem Gelenk an ihre entsprechenden Wellen (5) gekuppelt sind, wobei die Wellen frei von Schultern sind, da das System zum Sperren der Schleifscheibe und der entsprechenden Schleifscheibe derart angeordnet ist, dass es das Vorkommen jeglicher Querbewegung verhindert, wobei zwischen einer Schleifscheibe und einem entsprechenden Lager ein Abstandsringelement angeordnet ist.
  11. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die gegenläufigen Messerschärfschleifscheiben entweder ein spiralförmiges oder ein flaches Profil aufweisen und aus Stahl hergestellt sind, der mit einem abreibenden Material, wie etwa Diamant, CBN, Keramikmaterial oder dergleichen, beschichtet ist.
  12. Messerschärfvorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass, die Schleifscheiben kubisch-kristallines Bornitrid oder CBN umfassen.
EP08007179A 2007-04-13 2008-04-11 Verbesserte Messerschärfvorrichtung Active EP1980364B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000758A ITMI20070758A1 (it) 2007-04-13 2007-04-13 Dispositivo affilacotelli dotato di una struttura perfezionata

Publications (2)

Publication Number Publication Date
EP1980364A1 EP1980364A1 (de) 2008-10-15
EP1980364B1 true EP1980364B1 (de) 2011-06-08

Family

ID=39587036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08007179A Active EP1980364B1 (de) 2007-04-13 2008-04-11 Verbesserte Messerschärfvorrichtung

Country Status (4)

Country Link
EP (1) EP1980364B1 (de)
AT (1) ATE511947T1 (de)
ES (1) ES2367824T3 (de)
IT (1) ITMI20070758A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11376713B1 (en) 2021-03-09 2022-07-05 Sharkninja Operating Llc Knife sharpening systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106271914B (zh) * 2016-09-21 2018-11-30 阳江市阳东区天一刀具有限公司 一种自动磨刀装置及其控制系统和控制方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1256364B (it) * 1992-09-01 1995-12-04 Fazzini Patrizio Macchina perfezionata per l'arrotatura e l'affilatura di lame in genere
US6083088A (en) * 1996-08-23 2000-07-04 Turner Intellectual Property Limited Implement working adapter
US6752702B1 (en) * 2002-06-24 2004-06-22 Ted Thompson Knife sharpener
EP1745886A1 (de) * 2005-07-20 2007-01-24 Hans-Peter Zahnd Schleifgerät

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11376713B1 (en) 2021-03-09 2022-07-05 Sharkninja Operating Llc Knife sharpening systems
US11806839B2 (en) 2021-03-09 2023-11-07 Sharkninja Operating Llc Knife sharpening systems

Also Published As

Publication number Publication date
ATE511947T1 (de) 2011-06-15
EP1980364A1 (de) 2008-10-15
ITMI20070758A1 (it) 2008-10-14
ES2367824T3 (es) 2011-11-08

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