EP2603352B1 - Blade grinder comprising a blade holder - Google Patents

Blade grinder comprising a blade holder Download PDF

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Publication number
EP2603352B1
EP2603352B1 EP11799610.8A EP11799610A EP2603352B1 EP 2603352 B1 EP2603352 B1 EP 2603352B1 EP 11799610 A EP11799610 A EP 11799610A EP 2603352 B1 EP2603352 B1 EP 2603352B1
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EP
European Patent Office
Prior art keywords
axis
blade
knife
holder
grinder according
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EP11799610.8A
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German (de)
French (fr)
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EP2603352A2 (en
Inventor
Johannes Franzen
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Johannes Franzen GmbH and Co KG
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Johannes Franzen GmbH and Co KG
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Publication of EP2603352A2 publication Critical patent/EP2603352A2/en
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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
    • 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
    • B24B3/365—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of rotary mower blades
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/066—Work supports, e.g. adjustable steadies adapted for supporting work in the form of tools, e.g. drills

Definitions

  • the invention relates to a knife sharpener with a knife holder.
  • a generic knife sharpener is from the DE 10 2008 058550 A1 known.
  • a knife To grind a knife, a knife is usually guided along a grindstone.
  • An automation of knife sharpening devices allows a high precision of the grinding process.
  • difficulties for automatic operation arise when the knives have special contours requiring special guidance of the grinding wheel relative to the knife.
  • Knitch knives such as lawnmower knives
  • They have opposed cutting edges. To precisely grind such knives, they must be clamped. In this case, one side of the knife is first ground in a clamped position. Subsequently, the knife is clamped in the rotated position again, so that the second side of the knife can be ground.
  • the invention is therefore the object of further developing a knife sharpener with a knife holder such that even knives with complicated cutting contour can be ground with a simple knife sharpener.
  • the special bearing of the knife holder makes it possible to grind knives with two opposite cutting edges quickly and precisely.
  • the movement of the grindstone can remain within narrow limits. This saves time that would otherwise be necessary for the movement of the grindstone.
  • By rotating the knife holder about a vertical axis after grinding one side of the double-edged knife, the other edge can be ground.
  • the rotation of the knife holder about a horizontal axis allows a simple way to adjust the angle of attack of the knife relative to the grindstone and optionally also to vary during the grinding process.
  • the special holder of the knife thus enables a simple machine structure, a grinding of individually designed cutting edges and a particularly fast grinding process.
  • the knife holder is designed as a scale.
  • the knife holder thus offers the possibility of checking whether the knife attached to it has the same weight on both sides. If the knife is heavier on one side than on the other side, this difference in the grinding process can be compensated. This makes it possible to balance the knife during the grinding process.
  • the knife sharpener has a grindstone which is displaceable on a first straight line and on a second straight line perpendicular to the first straight line. While the knife holder is rotatable about two mutually perpendicular axes, the grindstone is movable on two mutually perpendicular lines. This allows a simple machine construction, in which the grindstone is preferably displaceable on a vertical straight line and on a horizontal straight line. The interaction of the rotational movements on the knife holder and the lateral displacements on the grindstone makes it possible to sharpen various knives quickly and precisely.
  • first axis intersects the second axis. This allows a simple construction of the knife holder.
  • the second axis is parallel to the first straight line. It is also advantageous if the first axis runs parallel to the second straight line. This facilitates the structure, as this, for example, all lines and axes can be formed either horizontally or vertically.
  • the knife holder is arranged concentrically to the second, preferably vertically arranged axis.
  • a simple structure results when the knife holder is arranged eccentrically to the first, preferably horizontal axis. This makes it possible to arrange the motor for the horizontal axis below the knife holder and to provide the vertical axis engine under the horizontal axis engine.
  • the first axis has a weight on the side opposite the knife holder, which rotates with the axis.
  • This weight is matched to the weight of the knife holder with the knife, so that the torque exerted by the knife holder with the knife on the axis is substantially canceled by the moment exerted by the weight on the axis moment.
  • a simple motor enough to pivot the horizontal axis with the attached blade holder.
  • the blade holder is rotatable about less than 360 degrees about the second axis.
  • a simple construction of the knife sharpener is achieved in that the first straight line on which the grindstone is moved, is horizontal.
  • a high precision with a fast feed is achieved in that the grindstone is vertically displaceable with a first spindle horizontally and with a second spindle.
  • Knife grinder 1 shown essentially consists of the knife holder 2, the knife holder bearing 3 and the grindstone. 4
  • the knife holder bearing 3 consists of a holding table 7, which is fixed to a first axis 8.
  • the axis 8 is rotatably mounted in a block 9. This block 9 is in turn rotatably mounted about a second axis 10.
  • weights 11, 12 are fixed so that the weights rotate with the axis 8.
  • brackets 13 and 14 are fixed to which height-adjustable devices 15, 16 are attached to support the knife 5.
  • the grindstone 4 is moved up and down via a first spindle (not shown) along a vertical first straight line 17.
  • a second spindle (not shown) allows the grindstone 4 to be displaced along a horizontal second straight line 18. This allows the motor 19 of the grindstone 4 to be accurately moved up and down and back and forth.
  • the knife holder bearing 3 is first rotated for the grinding process by means of a motor (not shown) according to the arrow 20 about the axis 10 so that the knife is located approximately below the grindstone 4.
  • the knife holder 2 is rotated along the direction of arrow 22 about the first axis 8, that the knife 5 is aligned in an optimal position obliquely to the grindstone 4.
  • the grindstone 4 can be lowered with the spindle and be moved horizontally so that it moves over the blade of the knife 5.
  • the first side 23 of the knife 5 is ground.
  • the knife 5 is rotated about the axis 10 so that the second side 24 of the knife 5 is positioned approximately below the grindstone 4.
  • the motor 21 By means of the motor 21, in turn, the oblique position of the blade 5 is set relative to the grindstone 4, before the grindstone 4 is lowered and moved on the cutting edge of the knife 5 back and forth.
  • a height-adjustable system 25 serves as an attachment for the table 7 in a special angular position of the table 7 relative to the block 9.
  • the knife sharpener makes it possible to remotely move the knife and the grindstone.
  • the few given possibilities of movement make it possible to grind a wide variety of knives with a simple device.
  • the programming of motion sequences means that special motion sequences can be recorded as a software program for special knives.
  • special motion sequences can be recorded as a software program for special knives.

Description

Die Erfindung betrifft einen Messerschleifer mit einem Messerhalter.The invention relates to a knife sharpener with a knife holder.

Ein gattungsgemäßer Messerschleifer ist aus der DE 10 2008 058550 A1 bekannt.A generic knife sharpener is from the DE 10 2008 058550 A1 known.

Um ein Messer zu schleifen wird üblicherweise ein Messer an einem Schleifstein entlang geführt. Eine Automatisierung von Messerschleifeinrichtungen ermöglicht eine hohe Präzision des Schleifvorganges. Schwierigkeiten für einen automatischen Betrieb entstehen jedoch, wenn die Messer spezielle Konturen aufweisen, die eine spezielle Führung der Schleifscheibe relativ zum Messer erfordern.To grind a knife, a knife is usually guided along a grindstone. An automation of knife sharpening devices allows a high precision of the grinding process. However, difficulties for automatic operation arise when the knives have special contours requiring special guidance of the grinding wheel relative to the knife.

Viele Messer, wie beispielsweise Rasenmähermesser, haben gegenüberliegende Schneiden. Um derartige Messer präzise zu schleifen, müssen sie eingespannt werden. Hierbei wird in einer eingespannten Position zunächst eine Seite des Messers geschliffen. Anschließend wird das Messer in gedrehter Position nochmals eingespannt, so dass die zweite Seite des Messers geschliffen werden kann.Many knives, such as lawnmower knives, have opposed cutting edges. To precisely grind such knives, they must be clamped. In this case, one side of the knife is first ground in a clamped position. Subsequently, the knife is clamped in the rotated position again, so that the second side of the knife can be ground.

Insbesondere bei Mulchmessern liegt keine gerade Schneide vor sondern die Schneide des Messers hat radial innen eine andere Form als radial außen. Derartige Messer sind mit herkömmlichen Messerschleifern nicht automatisch zu bearbeiten.Especially with mulching knives there is no straight cutting edge but the cutting edge of the knife has a different shape radially inward radially outside. Such knives can not be processed automatically with conventional knife sharpeners.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Messerschleifer mit einem Messerhalter derart weiterzuentwickeln, dass auch Messer mit komplizierter Schneidenkontur mit einem einfachen Messerschleifer geschliffen werden können.The invention is therefore the object of further developing a knife sharpener with a knife holder such that even knives with complicated cutting contour can be ground with a simple knife sharpener.

Diese Aufgabe wird mit einem Messerschleifer mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with a knife sharpener having the features of patent claim 1.

Die spezielle Lagerung des Messerhalters ermöglicht es, Messer mit zwei gegenüberliegenden Schneiden schnell und präzise zu schleifen. Die Bewegung des Schleifsteins kann in engen Grenzen bleiben. Dadurch wird Zeit eingespart, die sonst für die Bewegung des Schleifsteins notwendig wäre. Durch die Drehung des Messerhalters um eine senkrechte Achse kann nach dem Schleifen der einen Seite des zweischneidigen Messers die andere Schneide geschliffen werden. Das Drehen des Messerhalters um eine waagerechte Achse erlaubt es auf einfache Art und Weise, den Anstellwinkel des Messers relativ zum Schleifstein einzustellen und gegebenenfalls auch während des Schleifvorgangs zu variieren.The special bearing of the knife holder makes it possible to grind knives with two opposite cutting edges quickly and precisely. The movement of the grindstone can remain within narrow limits. This saves time that would otherwise be necessary for the movement of the grindstone. By rotating the knife holder about a vertical axis, after grinding one side of the double-edged knife, the other edge can be ground. The rotation of the knife holder about a horizontal axis allows a simple way to adjust the angle of attack of the knife relative to the grindstone and optionally also to vary during the grinding process.

Die spezielle Halterung des Messers ermöglicht somit einen einfachen Maschinenaufbau, ein Schleifen individuell gestalteter Schneiden und einen besonders schnellen Schleifprozess.The special holder of the knife thus enables a simple machine structure, a grinding of individually designed cutting edges and a particularly fast grinding process.

Der Messerhalter ist als Waage ausgebildet. Der Messerhalter bietet dadurch die Möglichkeit zu prüfen, ob das auf ihm befestigte Messer auf beiden Seiten das gleiche Gewicht aufweist. Sofern das Messer auf einer Seite schwerer ist als auf der anderen Seite, kann dieser Unterschied beim Schleifprozess ausgeglichen werden. Dies ermöglicht es, das Messer während des Schleifvorgangs auszuwuchten.The knife holder is designed as a scale. The knife holder thus offers the possibility of checking whether the knife attached to it has the same weight on both sides. If the knife is heavier on one side than on the other side, this difference in the grinding process can be compensated. This makes it possible to balance the knife during the grinding process.

Vorteilhaft ist es, wenn der Messerschleifer einen Schleifstein aufweist, der auf einer ersten Gerade und auf einer zur ersten Gerade senkrecht angeordneten zweiten Gerade verschiebbar ist. Während der Messerhalter um zwei senkrecht zueinander angeordnete Achsen drehbar ist, ist der Schleifstein auf zwei senkrecht zueinander angeordneten Geraden bewegbar. Dies ermöglicht einen einfachen Maschinenaufbau, bei dem der Schleifstein vorzugsweise auf einer senkrechten Geraden und auf einer waagerechten Geraden verschiebbar ist. Das Zusammenwirken der Drehbewegungen am Messerhalter und der Lateralverschiebungen am Schleifstein ermöglicht es, verschiedenste Messer schnell und präzise zu schleifen.It is advantageous if the knife sharpener has a grindstone which is displaceable on a first straight line and on a second straight line perpendicular to the first straight line. While the knife holder is rotatable about two mutually perpendicular axes, the grindstone is movable on two mutually perpendicular lines. This allows a simple machine construction, in which the grindstone is preferably displaceable on a vertical straight line and on a horizontal straight line. The interaction of the rotational movements on the knife holder and the lateral displacements on the grindstone makes it possible to sharpen various knives quickly and precisely.

Vorteilhaft ist es, wenn die erste Achse die zweite Achse schneidet. Dies ermöglicht einen einfachen Aufbau des Messerhalters.It is advantageous if the first axis intersects the second axis. This allows a simple construction of the knife holder.

Weiterhin wird vorgeschlagen, dass die zweite Achse zur ersten Geraden parallel ist. Vorteilhaft ist es ebenso, wenn die erste Achse zur zweiten Geraden parallel verläuft. Dies erleichtert den Aufbau, da dadurch beispielsweise alle Geraden und Achsen entweder waagerecht oder senkrecht ausgebildet sein können.Furthermore, it is proposed that the second axis is parallel to the first straight line. It is also advantageous if the first axis runs parallel to the second straight line. This facilitates the structure, as this, for example, all lines and axes can be formed either horizontally or vertically.

Vorteilhaft ist es, wenn der Messerhalter konzentrisch zur zweiten, vorzugsweise senkrecht angeordneten Achse angeordnet ist. Ein einfacher Aufbau ergibt sich, wenn der Messerhalter exzentrisch zur ersten, vorzugsweise waagerechten Achse angeordnet ist. Dies ermöglicht es, den Motor für die waagerechte Achse unterhalb des Messerhalters anzuordnen und den Motor für die senkrechte Achse unter dem Motor für die waagerechte Achse vorzusehen.It is advantageous if the knife holder is arranged concentrically to the second, preferably vertically arranged axis. A simple structure results when the knife holder is arranged eccentrically to the first, preferably horizontal axis. This makes it possible to arrange the motor for the horizontal axis below the knife holder and to provide the vertical axis engine under the horizontal axis engine.

Um den Messerhalter möglichst leicht gängig um die erste Achse drehen zu können, wird vorgeschlagen, dass die erste Achse auf der dem Messerhalter gegenüberliegenden Seite ein Gewicht aufweist, das sich mit der Achse dreht.In order to turn the knife holder as easily as possible around the first axis, it is proposed that the first axis has a weight on the side opposite the knife holder, which rotates with the axis.

Dieses Gewicht ist auf das Gewicht des Messerhalters mit dem Messer abgestimmt, so dass das durch den Messerhalter mit dem Messer auf die Achse ausgeübte Moment durch das vom Gewicht auf die Achse ausgeübte Moment im Wesentlichen aufgehoben wird. Dadurch reicht ein einfacher Motor aus, um die waagerechte Achse mit dem daran befestigten Messerhalter zu schwenken.This weight is matched to the weight of the knife holder with the knife, so that the torque exerted by the knife holder with the knife on the axis is substantially canceled by the moment exerted by the weight on the axis moment. As a result, a simple motor enough to pivot the horizontal axis with the attached blade holder.

Ein Drehen des Messerhalters um die zweite, vorzugsweise senkrechte Achse erschwert die Kabelführung zu dem die waagerechte Achse drehenden Motor. Daher wird vorgeschlagen, dass der Messerhalter um weniger als 360 Grad um die zweite Achse drehbar ist.Turning the knife holder about the second, preferably vertical axis makes the cable guide to the motor rotating the horizontal axis more difficult. Therefore, it is proposed that the blade holder is rotatable about less than 360 degrees about the second axis.

Ein einfacher Aufbau des Messerschleifers wird dadurch erreicht, dass die erste Gerade, auf der der Schleifstein bewegt wird, waagerecht ist.A simple construction of the knife sharpener is achieved in that the first straight line on which the grindstone is moved, is horizontal.

Eine hohe Präzision mit einer schnellen Zuführung wird dadurch erzielt, dass der Schleifstein mit einer ersten Spindel waagerecht und mit einer zweiten Spindel senkrecht verlagerbar ist.A high precision with a fast feed is achieved in that the grindstone is vertically displaceable with a first spindle horizontally and with a second spindle.

Eine bevorzugte Ausführungsvariante eines Messerschleifers ist in der Zeichnung dargestellt und wird im Folgenden näher erläutert. Es zeigt

Figur 1
eine schematische Ansicht eines Messerschleifers mit Messerhalter und Schleifstein und
Figur 2
eine Detailansicht der drehbeweglichen Lagerung für den Messerhalter.
A preferred embodiment of a knife sharpener is shown in the drawing and will be explained in more detail below. It shows
FIG. 1
a schematic view of a knife sharpener with knife holder and grindstone and
FIG. 2
a detailed view of the rotatable mounting for the knife holder.

Der in Figur 1 gezeigte Messerschleifer 1 besteht im Wesentlichen aus dem Messerhalter 2, dem Messerhalterlager 3 und dem Schleifstein 4.The in FIG. 1 Knife grinder 1 shown essentially consists of the knife holder 2, the knife holder bearing 3 and the grindstone. 4

Mit dem Messerhalter 2 wird ein Messer 5 in einem Futter 6 eingespannt und dadurch fest auf dem Messerhalterlager 3 gehalten. Das Messerhalterlager 3 besteht aus einem Haltetisch 7, der an einer ersten Achse 8 befestigt ist. Die Achse 8 ist in einem Bock 9 drehbar gelagert. Dieser Bock 9 ist wiederum um eine zweite Achse 10 drehbar gelagert.With the knife holder 2, a knife 5 is clamped in a chuck 6 and thereby held firmly on the knife holder bearing 3. The knife holder bearing 3 consists of a holding table 7, which is fixed to a first axis 8. The axis 8 is rotatably mounted in a block 9. This block 9 is in turn rotatably mounted about a second axis 10.

An der ersten Achse 8 sind Gewichte 11, 12 derart befestigt, dass sich die Gewichte mit der Achse 8 drehen. Auf den Gewichten 11 und 12 sind Halterungen 13 und 14 befestigt, an denen höhenverstellbare Einrichtungen 15, 16 zur Abstützung des Messers 5 befestigt sind.At the first axis 8 weights 11, 12 are fixed so that the weights rotate with the axis 8. On the weights 11 and 12 brackets 13 and 14 are fixed to which height-adjustable devices 15, 16 are attached to support the knife 5.

Der Schleifstein 4 wird über eine erste Spindel (nicht gezeigt) längs einer senkrechten ersten Geraden 17 auf und ab bewegt. Eine zweite Spindel (nicht gezeigt) ermöglicht ein Verschieben des Schleifsteins 4 längs einer waagerechten zweiten Gerade 18. Dadurch kann der Motor 19 des Schleifsteins 4 präzise auf und ab und hin und her bewegt werden.The grindstone 4 is moved up and down via a first spindle (not shown) along a vertical first straight line 17. A second spindle (not shown) allows the grindstone 4 to be displaced along a horizontal second straight line 18. This allows the motor 19 of the grindstone 4 to be accurately moved up and down and back and forth.

Das Messerhalterlager 3 wird für den Schleifprozess zunächst mittels eines Motors (nicht gezeigt) entsprechend dem Pfeil 20 um die Achse 10 so gedreht, dass das Messer etwa unter dem Schleifstein 4 liegt. Mit dem Motor 21 wird der Messerhalter 2 längs der Pfeilrichtung 22 derart um die erste Achse 8 gedreht, dass das Messer 5 in einer optimalen Lage schräg zum Schleifstein 4 ausgerichtet ist. Anschließend kann der Schleifstein 4 mit der Spindel abgesenkt werden und waagerecht verschoben werden, so dass er über die Klinge des Messers 5 fährt. Durch ein Hin- und Herbewegen des Schleifsteins 4 auf der Klinge des Messers 5 wird die erste Seite 23 des Messers 5 geschliffen.The knife holder bearing 3 is first rotated for the grinding process by means of a motor (not shown) according to the arrow 20 about the axis 10 so that the knife is located approximately below the grindstone 4. With the motor 21, the knife holder 2 is rotated along the direction of arrow 22 about the first axis 8, that the knife 5 is aligned in an optimal position obliquely to the grindstone 4. Subsequently, the grindstone 4 can be lowered with the spindle and be moved horizontally so that it moves over the blade of the knife 5. By reciprocating the grindstone 4 on the blade of the knife 5, the first side 23 of the knife 5 is ground.

Sowie die erste Seite 23 des Messers 5 geschliffen ist, wird das Messer 5 um die Achse 10 so gedreht, dass die zweite Seite 24 des Messers 5 etwa unter dem Schleifstein 4 positioniert ist. Mittels des Motors 21 wird wiederum die Schräglage des Messers 5 relativ zum Schleifstein 4 eingestellt, bevor der Schleifstein 4 abgesenkt und auf der Schneide des Messers 5 hin und her bewegt wird.As the first side 23 of the knife 5 is ground, the knife 5 is rotated about the axis 10 so that the second side 24 of the knife 5 is positioned approximately below the grindstone 4. By means of the motor 21, in turn, the oblique position of the blade 5 is set relative to the grindstone 4, before the grindstone 4 is lowered and moved on the cutting edge of the knife 5 back and forth.

Eine höhenverstellbare Anlage 25 dient als Anlage für den Tisch 7 in einer speziellen Winkellage des Tisches 7 relativ zum Bock 9.A height-adjustable system 25 serves as an attachment for the table 7 in a special angular position of the table 7 relative to the block 9.

Der Messerschleifer ermöglicht es, das Messer und den Schleifstein ferngesteuert zu bewegen. Die wenigen vorgegebenen Bewegungsmöglichkeiten erlauben es, mit einer einfachen Vorrichtung unterschiedlichste Messer zu schleifen.The knife sharpener makes it possible to remotely move the knife and the grindstone. The few given possibilities of movement make it possible to grind a wide variety of knives with a simple device.

Die Programmierung von Bewegungsabläufen führt dazu, dass für spezielle Messer spezielle Bewegungsabläufe als Softwareprogramm festgehalten werden können. Dadurch kann nach Einspannen eines Messers 5 mittels eines vorgegebenen, zum Messer 5 passenden Softwareprogramms der gesamte Bewegungsablauf von Messerhalter und Schleifstein vollautomatisch gesteuert werden. Dies führt zu einem schnellen, effizienten und besonders hochwertigen Messerschliff.The programming of motion sequences means that special motion sequences can be recorded as a software program for special knives. As a result, after clamping a knife 5 by means of a predetermined software program suitable for the knife 5, the entire movement sequence of knife holder and grindstone can be controlled fully automatically. This leads to a fast, efficient and especially high-quality knife sharpening.

Claims (9)

  1. A blade grinder (1) for grinding blades (5) with opposing cutters, for example mower blades, comprising a grinding stone (4) and a blade holder (2) which for setting the working angle is rotatably held relative to the grinding stone (4) on a first horizontal axis (8), wherein the first axis (8) for successive positioning of the two sides (23, 24) of the two-cutter blade (5) is rotatably held on a second, perpendicular, axis (10) that is arranged so as to be vertical relative to the first axis (8), characterised in that the blade holder (3) is designed in the manner of scales in order to balance the blade during the grinding process, and, provided said blade is heavier on one side than on the other side, to be able to balance out this difference during the grinding process.
  2. The blade grinder according to claim 1, characterised in that it comprises a grinding stone (4) that is slidable on a first straight line (17) and on a second straight line (18) that is arranged vertically to the first straight line.
  3. The blade grinder according to any one of the preceding claims, characterised in that the first axis (8) intersects the second axis (10).
  4. The blade grinder according to any one of the preceding claims, characterised in that the second axis (10) is parallel to the first straight line (17).
  5. The blade grinder according to any one of the preceding claims, characterised in that the blade holder (2) is arranged so as to be off-centre relative to the first axis (8).
  6. The blade grinder according to any one of the preceding claims, characterised in that the first axis (8) on the side opposite the blade holder (2) comprises a weight (11, 12) that rotates with the axis (8).
  7. The blade grinder according to any one of the preceding claims, characterised in that the blade holder (2) is rotatable on the second axis (10) by less than 360°.
  8. The blade grinder according to any one of claims 2 to 7, characterised in that the first straight line (17) is horizontal.
  9. The blade grinder according to any one of claims 2 to 8, characterised in that the grinding stone (4) with a first spindle is horizontally displaceable and with a second spindle is vertically displaceable.
EP11799610.8A 2010-08-11 2011-08-03 Blade grinder comprising a blade holder Active EP2603352B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010034048A DE102010034048A1 (en) 2010-08-11 2010-08-11 Knife sharpener with a knife holder
PCT/DE2011/001544 WO2012025089A2 (en) 2010-08-11 2011-08-03 Blade grinder comprising a blade holder

Publications (2)

Publication Number Publication Date
EP2603352A2 EP2603352A2 (en) 2013-06-19
EP2603352B1 true EP2603352B1 (en) 2014-04-16

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Application Number Title Priority Date Filing Date
EP11799610.8A Active EP2603352B1 (en) 2010-08-11 2011-08-03 Blade grinder comprising a blade holder

Country Status (4)

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US (1) US8986075B2 (en)
EP (1) EP2603352B1 (en)
DE (2) DE102010034048A1 (en)
WO (1) WO2012025089A2 (en)

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DE202019105860U1 (en) 2019-10-22 2019-12-16 Alfred Siemer Grinding device for grinding at least one knife with at least one grindstone

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CN103522178A (en) * 2013-10-25 2014-01-22 茂名市怡华机械有限公司 Compact and efficient tool sharpener sharpening head
CN112692707B (en) * 2020-12-24 2022-04-12 枣庄北航机床创新研究院有限公司 Six-linkage polishing method

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US4936053A (en) * 1988-10-14 1990-06-26 Will Shanelec Lawn mower blade sharpener apparatus
US5331774A (en) * 1992-07-09 1994-07-26 Domenella David D Method and device for sharpening chiral blades of dental instruments
US5547419A (en) * 1994-08-31 1996-08-20 Hulnicki; Andrew M. Knives and scissors sharpener
GB9802526D0 (en) * 1998-02-06 1998-04-01 Bernhard Stephen G Rotary mower blade grinding
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US20070281594A1 (en) * 2003-04-17 2007-12-06 Lee Valley Tools Ltd. Honing guide assembly with camber roller
US20070249269A1 (en) * 2006-04-20 2007-10-25 Ronald Swartz Self-aligning honing device
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DE102008023081A1 (en) * 2007-11-21 2009-05-28 Johannes Franzen Gmbh & Co. Sharpening device for workpiece i.e. cutter of lawn mower or chopper, has stationary sharpening wheel, swiveling device swivelably supported on base frame around vertical axle, and bolt swivelably supported on bearing block
US20100203808A1 (en) * 2009-02-06 2010-08-12 TMI Products Inc. Lathe gouge sharpening tool
US7967666B1 (en) * 2010-05-06 2011-06-28 Marvin Messner Blade sharpener

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019105860U1 (en) 2019-10-22 2019-12-16 Alfred Siemer Grinding device for grinding at least one knife with at least one grindstone

Also Published As

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DE102010034048A1 (en) 2012-02-16
US8986075B2 (en) 2015-03-24
WO2012025089A2 (en) 2012-03-01
DE112011102690A5 (en) 2013-05-29
EP2603352A2 (en) 2013-06-19
US20130157547A1 (en) 2013-06-20
WO2012025089A3 (en) 2012-05-10

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