WO2013041450A1 - Dispositif d'aiguisage - Google Patents

Dispositif d'aiguisage Download PDF

Info

Publication number
WO2013041450A1
WO2013041450A1 PCT/EP2012/068033 EP2012068033W WO2013041450A1 WO 2013041450 A1 WO2013041450 A1 WO 2013041450A1 EP 2012068033 W EP2012068033 W EP 2012068033W WO 2013041450 A1 WO2013041450 A1 WO 2013041450A1
Authority
WO
WIPO (PCT)
Prior art keywords
sharpening
base body
brackets
sharpening device
blade
Prior art date
Application number
PCT/EP2012/068033
Other languages
German (de)
English (en)
Inventor
Horst Löhnert
Thomas TAKACS
Original Assignee
Friedr. Dick Gmbh & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Friedr. Dick Gmbh & Co. Kg filed Critical Friedr. Dick Gmbh & Co. Kg
Priority to EP12759131.1A priority Critical patent/EP2758211B1/fr
Publication of WO2013041450A1 publication Critical patent/WO2013041450A1/fr

Links

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
  • 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 main 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 Schrfbügelarme 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.
  • 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.
  • the arms of the sharpening arms are preferably articulated to the plate-shaped main body of the sharpening device in such a way that they can be deflected from their rest position without contact to the main body, ie, without them grinding on the base body.
  • 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.
  • the sharpening device can thereby be used in two working positions, ie with the operator facing front or back of the body. 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 a sharpening device according to the invention for the blade of a cutting tool not shown in detail, in front view;
  • FIG. 2 shows the sharpening device from FIG. 1 in a longitudinal section along the section line designated A-A in FIG. 1.
  • 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.
  • the sharpening device is in a along the in FIG. 1 with A-A designated cutting line guided longitudinal section reproduced.
  • 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 portion 32 of only one of their sharpening arms 20a, 20b, 22a, 22b rotatably mounted via attachment means 34 at articulation points 36 of the 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 main 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 arm 20b of the sharpening arm 20 is supported on the rear side 30 of the main body on the profile projection 38 shown in FIG.
  • the sharpening bracket 22 is pivotally hinged with its rear sharpening bow arm 22b on the back 30 of the base body 12 at the articulation point 36 shown on the left in FIG. 1 on the base body 12 and with its sharpening arm 22a on the front side 28 of FIG Base body 12 supported on the profile projection 38 of the base body 12 shown in Fig. 1.
  • 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 components to the main body 12, which extend through a recess of the base body 12 and which may be rotatably connected to the main body 12.
  • the sharpening brackets 20, 22 are pivotable relative to the base body 12 in a direction of rotation relative to the base body 12, indicated by arrows 42, by a blade inserted into the guide slot 14 from its shown rest position.
  • 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 recesses 66 for fastening means to rigidly arrange the sharpening device 10 on 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.

Landscapes

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

Abstract

L'invention concerne un dispositif d'aiguisage (10) pour la lame d'un outil de coupe, comportant un corps de base (12) en forme de plaque, présentant une fente de guidage (14) pour une lame à aiguiser. Des étriers d'aiguisage (20, 22) sont articulés pivotants sur le corps de base, des deux côtés de la fente de guidage (14). Les étriers d'aiguisage (20, 22) présentent respectivement deux bras (20a, 20b, 22a, 22b) d'étriers d'aiguisage reliés mutuellement sur une extrémité, les étriers d'aiguisage (20, 20) pouvant pivoter à partir de leur position de repos respective sous l'effet d'une pression exercée par la lame insérée dans la fente de guidage (14) contre une force de rappel élastique produite par une déformation élastique, notamment une torsion, des étriers d'aiguisage (20, 22). Les étriers d'aiguisage (20, 22) entourent le corps de base (12) respectivement avec leurs deux bras (20a, 20b, 22a, 22b) d'étriers d'aiguisage, les étriers d'aiguisage (20, 22) n'étant articulés rotatifs sur le corps de base (12) qu'avec un de leurs bras respectifs (20a, 22b) et s'appuyant exclusivement sur le corps de base (12) avec l'autre bras (20a, 22b).
PCT/EP2012/068033 2011-09-22 2012-09-14 Dispositif d'aiguisage WO2013041450A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12759131.1A EP2758211B1 (fr) 2011-09-22 2012-09-14 Dispositif d'aiguisage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083177.0 2011-09-22
DE201110083177 DE102011083177A1 (de) 2011-09-22 2011-09-22 Schärfvorrichtung

Publications (1)

Publication Number Publication Date
WO2013041450A1 true WO2013041450A1 (fr) 2013-03-28

Family

ID=46851497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/068033 WO2013041450A1 (fr) 2011-09-22 2012-09-14 Dispositif d'aiguisage

Country Status (3)

Country Link
EP (1) EP2758211B1 (fr)
DE (1) DE102011083177A1 (fr)
WO (1) WO2013041450A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440953A (en) * 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
EP1260318B1 (fr) 2001-05-18 2007-05-30 Bobet Materiel Appareil pour affiler les lames d'outils tranchants

Family Cites Families (1)

* 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440953A (en) * 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
EP1260318B1 (fr) 2001-05-18 2007-05-30 Bobet Materiel Appareil pour affiler les lames d'outils tranchants

Also Published As

Publication number Publication date
DE102011083177A1 (de) 2013-03-28
EP2758211B1 (fr) 2015-11-04
EP2758211A1 (fr) 2014-07-30

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