EP1716975A1 - Vorrichtung zum Schärfen von Schneidkanten - Google Patents

Vorrichtung zum Schärfen von Schneidkanten Download PDF

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Publication number
EP1716975A1
EP1716975A1 EP06356040A EP06356040A EP1716975A1 EP 1716975 A1 EP1716975 A1 EP 1716975A1 EP 06356040 A EP06356040 A EP 06356040A EP 06356040 A EP06356040 A EP 06356040A EP 1716975 A1 EP1716975 A1 EP 1716975A1
Authority
EP
European Patent Office
Prior art keywords
sharpening
rods
sharpening means
cutting edge
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.)
Granted
Application number
EP06356040A
Other languages
English (en)
French (fr)
Other versions
EP1716975B1 (de
Inventor
Jacques Joseph Raynaud
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.)
Fischer Castet Ets
Original Assignee
Fischer Castet Ets
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 Fischer Castet Ets filed Critical Fischer Castet Ets
Publication of EP1716975A1 publication Critical patent/EP1716975A1/de
Application granted granted Critical
Publication of EP1716975B1 publication Critical patent/EP1716975B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 present invention relates to a device for sharpening a blade edge.
  • This type of device is used to maintain the sharpened part of a blade, ie its cutting edge, which produces the cutting line when using the blade.
  • the invention particularly relates to the sharpening of the cutting edge of knife blades.
  • Sharpening is a maintenance operation to be performed regularly to ensure that the wire of the blade, that is to say the cutting edge of the cutting edge, is substantially straight.
  • this wire tends to be deformed and / or notched when the cutting edge is applied against relatively hard objects.
  • the blade of the knife encounters bones or cartilage more resistant than the flesh, which dulls the edge of the blade.
  • the sharpening is done manually using a rifle against which the user rubs each side of the edge, usually many times, to straighten and smooth the face. Although satisfactory, the rifle is a tedious tool to handle and requires some experience to make the most of it. In addition, in certain fields such as the agri-food industry, the repetitive use of such a rifle represents significant downtime, entailing significant costs, since the cutting operations must be regularly interrupted to sharpen the blades used. .
  • the object of the present invention is to provide a sharpening device, particularly intended for use in agri-food or similar laboratories, whose use is easy and fast and which guarantees a uniform sharpening of both sides of the blade edge.
  • the invention relates to a device for sharpening a blade edge, comprising a first and a second sharpening means, distinct from each other and respectively adapted to sharpen simultaneously one and the other of the two faces of the cutting edge by frictional contact against these faces, characterized in that it also comprises mechanical connection means between the first and second sharpening means, adapted to synchronously transmit the movement of one of the first and second sharpening means to the other when the cutting edge is rubbed against these sharpening means and drives them on the move.
  • both sharpening means allows to sharpen simultaneously both sides of the cutting edge of the blade.
  • the use of connecting means between the first and second sharpening means ensures that the friction on one of the two faces of the cutting edge and the friction on the other side of the cutting edge are made substantially homogeneously since the kinematics respective of the two sharpening means with respect to the cutting edge are synchronized. In other words, neither of these two sharpening means can be driven faster than the other.
  • the device comprises a removable housing for receiving and supporting connecting means.
  • the mechanical structure of synchronization of the device can be easily and quickly disassembled, in particular to be washed and / or allow the replacement of a used part.
  • a device 1 for sharpening a cutting edge 2 of a blade 3 of a knife 4 whose handle is only partially represented.
  • the device 1 is intended to sharpen by friction the two faces 2A and 2B of the cutting edge in order to reform its wire.
  • the device 1 comprises a main housing 10 preferably made of polypropylene for contact with food.
  • This housing has a generally flat shape which, in the position of the device shown in the figures and corresponding to the position of use of the device, extends substantially vertically.
  • the following description of the device 1 will be oriented relative to this housing as shown, that is to say that the terms “upper” and “top” designate a direction directed upwards in the figures, while the terms “lower” and “lower” correspond to an opposite direction. Similarly, the terms “left” and “right” correspond to the directions directed respectively to the left and to the right in the figures.
  • the elements of the device directed to the reader looking at the figures are considered proximal, while the elements directed away from the reader are considered distal, since, as figured by the user's hand shown in FIGS. 2A and 2B and as explained below, in operation, the user is placed on the side of the housing 10 directed towards the reader looking at the figures.
  • the housing 10 is provided with two left side handles 12A and 12B right hand allowing the user to hold the device 1 by hand to move from one place to another and / or to immobilize it during the sharpening of the cutting edge 2.
  • these handles have profiled surfaces, particularly making hollow and bumps, to facilitate the handling of the housing.
  • the housing 10 delimits an opening 14 whose contour globally forms a V when this opening is observed along an arrow 6 pointing in a distal direction and which corresponds to the observation direction of the device 1 by the user when the latter wishes to sharpen the blade 3.
  • This opening passes right through the wall of the housing 10 in the direction of the arrow 6.
  • the opening 14 also opens outwardly at the upper end edge of the housing, forming a flare 15 diverge upwards.
  • the opening 14 is thus adapted to receive and guide the blade 3 of the knife 4, the blade can, on the one hand, be introduced into the opening from the top of the housing 10 so that its longitudinal direction extends substantially following the direction of the arrow 6 and, on the other hand, be slidably driven in a direction substantially parallel to that of the arrow 6.
  • the walls of the flare 15 are reinforced to prevent their early degradation due to the blades successively introduced into the slot 14.
  • one or more metal bars may be provided, in extending in length from the upper end to the lower end of the wall.
  • the longitudinal ends of each bar are directly overmolded by the corresponding wall of the flare, with the addition of a bulge of material on the lower side of the wall for reinforcement of the wall and mechanical strength of the bar .
  • the opening 14 delimits a substantially vertical plane of symmetry P in the figures, with respect to which the left and right parts of the housing 10 are substantially symmetrical.
  • the housing 10 delimits an internal housing 16 shown in dashed lines in Figures 1 and 2A.
  • This housing open downwards at the lower end edge of the housing 10, is closed, in the assembled state of the device 1, by a complementary base 18.
  • the base and screws 21 for securing the base are provided, so that this base is firmly fixed to the lower part of the housing 10 when the device 1 is assembled and used, while allowing its release when the maintenance of this device.
  • These pins and screws may be completed by other securing elements and, more generally, various forms of these securing means are possible, in particular shapes facilitating the relative positioning of the housing 10 and the base 18 when of their assembly.
  • the device 1 is provided with two pairs of curved rods 22A and 22B.
  • These sharpening rods have a substantially constant diameter along their length and are preferably made of a stainless steel for food contact. Their outer surface is substantially smooth, the rods being heat treated to increase their surface hardness.
  • the pairs of rods 22A and 22B intersect by defining between them an angular zone 24 for receiving and rubbing application of the blade 3.
  • This zone 24 extends on either side of the plane P More specifically, as shown in FIGS. 3A and 3B, the blade 3 can be placed in this zone so that it extends in length substantially along the plane P and that its face 2A is in contact with the rods 22A while its face 2B is in contact with the rods 22B.
  • the rods 22A intersect the rods 22B alternately, that is to say that, following the arrow 6, follow one another, at the top of the zone 24, a first rod 22A, a first rod 22B, the second rod 22A and the second rod 22B.
  • the portion of the cutting edge 2 rubbed by these rods is wedged laterally, that is to say that the movements of the blade 3 on either side of the plane P are strongly limited by the rods.
  • the pairs of rods 22A and 22B are hinged relative to the housing 10. Each rod is, together with the other rod of its pair, movable relative to the housing between an initial end position shown in Figures 2A and 3A, and an extreme position final shown in Figures 2B and 3B. To move from its initial position to its final position, each pair of rods 22A, 22B describes a rotational movement about a geometric axis AA, respectively BB.
  • the axes of rotation AA and BB are symmetrical with respect to the plane P and define a plane substantially perpendicular to the plane P.
  • the zone 24 presents, seen along the arrow 6 as in FIG. 3A, a generally V-shaped outline whose tip is directed downwards.
  • the rotation of the rods 22A, 22B is controlled by the downward thrust of the blade 3 when the latter is received in the zone 24.
  • This drive is synchronized between the two pairs of rods that is to say that the rotation of one of the pairs of rods causes the rotation of the other pair of rods on an identical stroke, but in the opposite direction.
  • the V-shaped shape of the zone 24 is substantially unchanged, the curvature of the rods being dimensioned so that the apex angle ⁇ of the V presents a substantially constant value on the displacement stroke of the rods 22A and 22B, between their position in Figure 2A and that of Figure 2B.
  • This value of the angle ⁇ is preferably equal to approximately 60 °, so that, when the blade 3 extends in the zone 24 along the plane P, each of the faces 2A, 2B of its cutting edge 2 forms with the rods respectively associated 22A and 22B an angle of about 30 ° seen along the arrow 6, and whatever the position of the rods synchronized between their two extreme positions.
  • This angle value of 30 ° corresponds to an optimum as regards the quality and the effectiveness of the sharpening by friction of each face of the cutting edge against the stems.
  • the device 1 has a mechanical connection of synchronization between these rods.
  • the parties lower end of the rods 22A, 22B of each pair are secured to respective shafts 26A, 26B, preferably by overmolding the lower ends of the rods, to ensure better hygiene and to ensure better mechanical strength and greater rigidity.
  • the lower end portions of the rods may be locally flattened by crushing into several zones along the length of the rods, before the material constituting the shafts is applied. to coat these lower parts of the stem. In this way, the rods are firmly retained vis-à-vis the trees at these crushed areas (not visible in the figures), which block the rods including rotating on themselves.
  • the shafts 26A, 26B define, centrally, the geometric axes of rotation A-A and B-B.
  • each of these shafts 26A and 26B externally delimits a complementary cylindrical surface 28A, 28B (FIG. 1) with corresponding semi-cylindrical bearing surfaces 30A, 30B and 32A, 32B delimited respectively by the base 18 and the lower part of the
  • the axes AA and BB are fixed relative to the housing in mounted configuration of the device.
  • the distal end portions 34A, 34B of the shafts 26A, 26B extend into the inner housing 16 of the housing 10 and have a square section, complementary to the central bore 36A, 36B of wheels 38A, 38B, associated and arranged in the housing 16.
  • Each of these wheels has, on part of its outer periphery, a toothing 40A, 40B.
  • the teeth of the two wheels are mounted in engagement with each other, so that the rotation drive of one of the wheels about its corresponding axis AA, BB causes the rotation of the other wheel. around its axis, in opposite directions.
  • each wheel 38A, 38B is provided with a first stop 42A, 42B, generally in the form of a first radially projecting wing of the tubular body of the wheel, adapted to come to bear against its lower surface against a corresponding surface. 44A, 44B formed by the upper face of the lower bottom of the cover 18 when the rods are in their initial position, as shown in Figure 3A.
  • each wheel 38A, 38B is provided with a second stop 46A, 46B, generally in the form of a second radially projecting wing of the wheel body and extending approximately at right angles to the wing forming the first stop 42A, 42B.
  • These second stops 46A, 46B are adapted for, when the rods are in their final position, as shown in FIG. 3B, come to bear on their respective right and left sides, that is to say their faces facing the P plane, against corresponding respective surfaces 48A, 48B formed by a common arm 49 integral with the housing 10 and extending downwardly projecting from the underside of the upper wall defining the housing 16, on the other hand and other of plan P.
  • the wings forming the abovementioned abutments 42A, 42B and 46A, 46B are integral with the remainder of the corresponding wheel 38A, 38B, these wheels being made for example of a polyamide loaded with glass fibers or carbon or a similar material.
  • the device 1 further comprises two compression springs 50A, 50B located in the housing 16 and interposed respectively between the housing 10 and the first stop 42A of the wheel 38A and between the housing and the first stop 42B of the wheel 38B.
  • each spring is associated with one of the gears and acts directly on it relative to the fixed housing.
  • each spring 50A, 50B is arranged in the housing 16 so that the upper end of the spring is pressed against the lower face of the upper wall delimiting the housing 16, while its lower end is supported on the upper face of the housing. the wing-shaped stop 42A, 42B.
  • Each spring thus exerts an elastic force E A , respectively E B , which tends to move the corresponding abutment 42A, 42B to its associated bearing surface 44A, 44B of the base 18. Consequently, these springs allow the automatic return of rods 22A, 22B to their initial end position.
  • each spring 50A, 50B opposes the rotation of its corresponding wheel when the associated rods are driven to their final end position, since the intensity of the rotation of the rods 22A, 22B must be sufficient to overcome the efforts E A and E B and further compress the springs. In other words, these springs damply retain the wheels 38A, 38B when the rods are moved from their initial position to their final position.
  • the device 1 further comprises, optionally, a base 60 for fixing the device to a use plan, such as a table edge working.
  • the base 18 is immobilized on this base being wedged at its left and right sides by corresponding pins 62 secured firmly to the base.
  • this base is provided with perforations 64 allowing its anchoring, preferably removable, to the aforementioned use plan.
  • the rods 22A and 22B are in their initial position of FIGS. 2A and 3A.
  • the blade 3 is then introduced into the zone 24 defined between the high parts of these rods, the introduction of the blade being guided by the V-shaped opening 14 of the housing 10.
  • the upper flaring 15 of the opening 14 is advantageously provided higher than zone 24.
  • the tip of the blade is disposed on the distal side of the device, being as far as possible from the user, so that the proximal end portion of the blade 3 is placed in zone 24.
  • the user then imposes on the blade 3 of the knife 4 a movement from top to bottom indicated by an arrow 70 in FIGS. 2A, 2B, 3A and 3B, while pulling the knife toward him as indicated by an arrow 71.
  • This movement is guided by the V-shaped opening 14 of the housing 10.
  • the device 1 is immobilized, being held by the user by hand, at one of the handles 12A, 12B, and possibly being fixed to a work plane by means of the base 60. It will be noted that, because of its overall symmetry with respect to the plane P, the device 1 is just as easily solicited by a right-handed user as left-handed.
  • the springs 50A and 50B are dampened against the displacement of the rods, which results, for the user, in a certain resistance of the rods 22A and 22B to escape under the 3. In this way, the cutting edge 2 is effectively rubbed against these rods to reform its wire.
  • the wear parts of the device 1, that is to say essentially the rods 22A, 22B, the toothed wheels 38A, 38B and the springs 50A, 50B are easily removable for cleaning and, if necessary, changed.
  • the use of exclusively mechanical interaction parts allows the device 1 to be quickly cleaned and to be particularly light, facilitating its handling and transport from one place of use to another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Food-Manufacturing Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
EP06356040A 2005-04-26 2006-04-07 Vorrichtung zum Schärfen von Schneidkanten Not-in-force EP1716975B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0504176A FR2884746B1 (fr) 2005-04-26 2005-04-26 Dispositif pour affiler un tranchant de lame

Publications (2)

Publication Number Publication Date
EP1716975A1 true EP1716975A1 (de) 2006-11-02
EP1716975B1 EP1716975B1 (de) 2007-11-14

Family

ID=34955319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06356040A Not-in-force EP1716975B1 (de) 2005-04-26 2006-04-07 Vorrichtung zum Schärfen von Schneidkanten

Country Status (4)

Country Link
EP (1) EP1716975B1 (de)
AT (1) ATE378150T1 (de)
DE (1) DE602006000230T2 (de)
FR (1) FR2884746B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937179A1 (de) * 2014-04-23 2015-10-28 Dassaud Fils Schleifvorrichtung für eine Klinge eines Handschneidewerkzeugs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022015412A1 (en) * 2020-07-17 2022-01-20 Primedge, Inc. Blade sharpener

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617235A (en) * 1949-06-29 1952-11-11 Nilsson & Johansson Ab Sharpening machine
US4934110A (en) * 1985-04-22 1990-06-19 John Juranitch Edge sharpening apparatus
US5440953A (en) * 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
US20040097179A1 (en) * 2002-11-14 2004-05-20 Ivo Cozzini Blade sharpening apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7121935B2 (en) * 2001-12-23 2006-10-17 Pretorius Stephan Deon Blade sharpener

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2617235A (en) * 1949-06-29 1952-11-11 Nilsson & Johansson Ab Sharpening machine
US4934110A (en) * 1985-04-22 1990-06-19 John Juranitch Edge sharpening apparatus
US5440953A (en) * 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
US20040097179A1 (en) * 2002-11-14 2004-05-20 Ivo Cozzini Blade sharpening apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937179A1 (de) * 2014-04-23 2015-10-28 Dassaud Fils Schleifvorrichtung für eine Klinge eines Handschneidewerkzeugs
FR3020299A1 (fr) * 2014-04-23 2015-10-30 Dassaud Fils Dispositif d'affilage d'une lame d'outil coupant a main

Also Published As

Publication number Publication date
ATE378150T1 (de) 2007-11-15
FR2884746B1 (fr) 2008-12-19
DE602006000230T2 (de) 2008-09-18
EP1716975B1 (de) 2007-11-14
DE602006000230D1 (de) 2007-12-27
FR2884746A1 (fr) 2006-10-27

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