EP1716975A1 - Device for sharpening blade edges - Google Patents

Device for sharpening blade edges 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
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EP
European Patent Office
Prior art keywords
sharpening
rods
sharpening means
cutting edge
blade
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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
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German (de)
French (fr)
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EP1716975B1 (en
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
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Fischer Castet Ets
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Publication date
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Publication of EP1716975A1 publication Critical patent/EP1716975A1/en
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Publication of EP1716975B1 publication Critical patent/EP1716975B1/en
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    • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

The device has two pairs of curved rods (22A, 22B) sharpening two sides of an edge of a knife blade by rubbing against the respective sides. The lower end parts of the rods (22A, 22B) are integrated to shafts (26A, 26B) by over molding. The distal end parts (34A, 34B) of the shafts comprise a squared section complementary to central holes (36A, 36B) of wheels (38A, 38B). The shafts and the wheels permit to synchronize the relative displacements of the rods when the edge is rubbed against the rods.

Description

La présente invention concerne un dispositif pour affiler un tranchant de lame.The present invention relates to a device for sharpening a blade edge.

Ce type de dispositif est utilisé pour entretenir la partie affilée d'une lame, c'est-à-dire son tranchant, qui produit la ligne de coupe lors de l'utilisation de la lame. L'invention concerne en particulier l'affilage du tranchant de lames de couteaux.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.

L'affilage est une opération d'entretien à effectuer régulièrement pour garantir que le fil de la lame, c'est-à-dire l'arrête coupante du tranchant, soit sensiblement rectiligne. Lors de l'utilisation du couteau, ce fil a en effet tendance à être déformé et/ou entaillé lorsque le tranchant est appliqué contre des objets relativement durs. Par exemple, lors de la découpe d'une carcasse de viande, la lame du couteau rencontre des os ou des cartilages plus résistants que la chair, ce qui émousse le tranchant de la lame.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. When using the knife, this wire tends to be deformed and / or notched when the cutting edge is applied against relatively hard objects. For example, when cutting a meat carcass, the blade of the knife encounters bones or cartilage more resistant than the flesh, which dulls the edge of the blade.

Traditionnellement, l'affilage est réalisé manuellement au moyen d'un fusil contre lequel l'utilisateur fait frotter chaque face du tranchant, généralement à de nombreuses reprises, pour redresser et aplanir la face. Bien que satisfaisant, le fusil est un outil fastidieux à manipuler et qui nécessite une certaine expérience pour en tirer le meilleur parti. En outre, dans certains domaines tels que l'industrie agroalimentaire, l'utilisation répétitive d'un tel fusil représente des temps d'arrêt significatifs, impliquant des coûts non négligeables, puisque les opérations de découpe doivent être régulièrement interrompues pour affiler les lames utilisées.Traditionally, 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. .

Par US-A-2004/097179 et US-A-4,934,110 , on connaît des appareils pour affiler le tranchant d'une lame, comprenant deux groupes distincts d'au moins une tige d'affilage, ces deux groupes de tige(s) permettant respectivement d'affiler les deux faces du tranchant par contact frottant contre ces faces. Les deux groupes de tige(s) sont portés par un boîtier rigide, avec interposition de ressorts respectifs. Ces deux ressorts sont totalement découplés l'un de l'autre, de sorte que le mouvement d'un groupe de tige(s) n'interfère pas avec celui de l'autre groupe de tige(s). Il en résulte que des frottements d'intensités différentes se produisent au niveau de chaque groupe de tige(s) si l'utilisateur n'applique pas la lame à affiler de manière rigoureusement verticale au niveau de la zone de croisement des tiges. Cet inconvénient est d'autant plus marqué dans les domaines précités, tels que l'industrie agroalimentaire, car les cadences de travail n'autorisent pas l'utilisateur à toujours être très attentif au positionnement des lames à affiler contre chacun des groupes de tige(s).By US-2004/097179 and US Patent 4,934,110 there are known devices for sharpening the cutting edge of a blade, comprising two distinct groups of at least one sharpening rod, these two groups of rods (s) respectively for sharpening the two sides of the cutting edge by rubbing contact against these faces. The two groups of rod (s) are carried by a rigid housing, with the interposition of respective springs. These two springs are totally decoupled from each other, so that the movement of one group of rods (s) does not interfere with that of the other group of rod (s). As a result, friction of different intensities occur at each rod group (s) if the user does not apply the blade to sharpen vertically at the crossover point of the rods. This disadvantage is all the more marked in the aforementioned fields, such as the food industry, because the rates of work do not allow the user to always pay close attention to the positioning of the blades to be sharpened against each of the rod groups ( s).

Le but de la présente invention est de proposer un dispositif d'affilage, particulièrement destiné à être utilisé dans des laboratoires agroalimentaires ou analogues, dont l'utilisation est facile et rapide et qui garantit un affilage homogène des deux faces du tranchant de lame.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.

A cet effet, l'invention a pour objet un dispositif pour affiler un tranchant de lame, comprenant un premier et un second moyens d'affilage, distincts l'un de l'autre et respectivement adaptés pour affiler simultanément l'une et l'autre des deux faces du tranchant par contact frottant contre ces faces, caractérisé en ce qu'il comporte également des moyens de liaison mécanique entre les premier et second moyens d'affilage, adaptés pour transmettre de manière synchronisée le déplacement de l'un des premier et second moyens d'affilage à l'autre lorsque le tranchant est frotté contre ces moyens d'affilage et entraîne ces derniers en déplacement.For this purpose, 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.

La présence des deux moyens d'affilage permet d'affiler simultanément les deux faces du tranchant de la lame. En outre, le recours aux moyens de liaison entre les premier et second moyens d'affilage garantit que le frottement sur l'une des deux faces du tranchant et le frottement sur l'autre face du tranchant sont réalisés de manière sensiblement homogène puisque les cinématiques respectives des deux moyens d'affilage par rapport au tranchant sont synchronisées. Autrement dit, aucun de ces deux moyens d'affilage ne peut être entraîné plus vite que l'autre. Ainsi, en un seul geste consistant à faire frotter le tranchant contre les moyens d'affilage du dispositif suivant l'invention, l'utilisateur est assuré que les deux faces du tranchant sont affilées simultanément et de la même manière, même si l'utilisateur ne positionne pas la lame de manière rigoureusement identique contre chacun des moyens d'affilage. Le fil du tranchant est ainsi rapidement et convenablement reformé. En outre, la structure mécanique du dispositif selon l'invention lui confère une robustesse remarquable, ainsi qu'un haut niveau de fiabilité, apprécié dans le domaine de l'industrie agroalimentaire.The presence of both sharpening means allows to sharpen simultaneously both sides of the cutting edge of the blade. In addition, 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. Thus, in a single action of rubbing the cutting edge against the sharpening means of the device according to the invention, the user is assured that both sides of the cutting edge are sharpened simultaneously and in the same way, even if the user does not position the blade rigorously identical against each of the sharpening means. The edge wire is thus quickly and properly reformed. In addition, the mechanical structure of the device according to the invention gives it a remarkable robustness, as well as a high level of reliability, appreciated in the field of the food industry.

D'autres caractéristiques de ce dispositif, prises isolément ou selon toutes les combinaisons techniquement possibles, sont énoncées aux revendications 2 à 10.Other features of this device, taken individually or in any technically possible combination, are set forth in claims 2 to 10.

Suivant une autre caractéristique avantageuse, le dispositif comporte un boîtier démontable de réception et de support des moyens de liaison. Ainsi, la structure mécanique de synchronisation du dispositif peut être facilement et rapidement démontée, notamment pour être lavée et/ou permettre le remplacement d'une pièce usée.According to another advantageous characteristic, the device comprises a removable housing for receiving and supporting connecting means. Thus, 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.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels :

  • la figure 1 est un éclaté en perspective d'un dispositif selon l'invention ;
  • la figure 2A est une vue en perspective d'un dispositif de la figure 1 associé à un couteau à affiler, les moyens d'affilage du dispositif occupant une première position d'utilisation extrême ;
  • la figure 2B est une vue analogue à la figure 2A, avec les moyens d'affilage du dispositif occupant une seconde position d'utilisation extrême ; et
  • les figures 3A et 3B sont des vues en élévation d'une partie interne du dispositif de la figure 1, respectivement dans ses configurations des figures 2A et 2B.
The invention will be better understood on reading the description which follows, given solely for example and made with reference to the drawings in which:
  • Figure 1 is an exploded perspective of a device according to the invention;
  • Figure 2A is a perspective view of a device of Figure 1 associated with a sharpening knife, the sharpening means of the device occupying a first position of extreme use;
  • Figure 2B is a view similar to Figure 2A, with the sharpening means of the device occupying a second position of extreme use; and
  • Figures 3A and 3B are elevational views of an inner portion of the device of Figure 1, respectively in its configurations of Figures 2A and 2B.

Sur les figures est représenté un dispositif 1 pour affiler un tranchant 2 d'une lame 3 d'un couteau 4 dont le manche n'est que partiellement représenté. Le dispositif 1 est destiné à affiler par frottement les deux faces 2A et 2B du tranchant en vue de reformer son fil.In the figures is shown 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.

Le dispositif 1 comporte un boîtier principal 10 réalisé de préférence en polypropylène permettant le contact avec des aliments. Ce boîtier présente une forme globalement plane qui, dans la position du dispositif représentée aux figures et correspondant à la position d'utilisation du dispositif, s'étend sensiblement verticalement. Par commodité, la suite de la description du dispositif 1 sera orientée par rapport à ce boîtier tel que représenté, c'est-à-dire que les termes « supérieur » et « haut » désignent une direction dirigée vers le haut sur les figures, tandis que les termes « inférieur » et « bas » correspondent à une direction opposée. De même, les termes « gauche » et « droit » correspondent aux directions dirigées respectivement vers la gauche et vers la droite sur les figures. En outre, les éléments du dispositif dirigés vers le lecteur regardant les figures sont considérés comme proximaux, tandis que les éléments dirigés à l'opposé du lecteur sont considérés comme distaux, puisque, comme figuré par la main de l'utilisateur représenté aux figures 2A et 2B et comme expliqué ci-après, en fonctionnement, l'utilisateur se place du côté du boîtier 10 dirigé vers le lecteur regardant les figures.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. For convenience, 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. In addition, 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.

Le boîtier 10 est muni de deux poignées latérales gauche 12A et droite 12B permettant à l'utilisateur de tenir le dispositif 1 à la main pour le déplacer d'un endroit à un autre et/ou pour l'immobiliser lors de l'affilage du tranchant 2. Avantageusement, ces poignées présentent des surfaces profilées, ménageant en particulier des creux et des bosses, destinée à faciliter la prise en main du boîtier.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. Advantageously, these handles have profiled surfaces, particularly making hollow and bumps, to facilitate the handling of the housing.

Dans sa partie haute, le boîtier 10 délimite une ouverture 14 dont le contour forme globalement un V lorsque cette ouverture est observée suivant une flèche 6 pointant dans une direction distale et qui correspond à la direction d'observation du dispositif 1 par l'utilisateur lorsque ce dernier souhaite affiler la lame 3. Cette ouverture traverse de part en part la paroi du boîtier 10 suivant la direction de la flèche 6. L'ouverture 14 débouche également sur l'extérieur au niveau du chant d'extrémité supérieure du boîtier, en formant un évasement 15 divergent vers le haut. L'ouverture 14 est ainsi adaptée pour recevoir et guider la lame 3 du couteau 4, la lame pouvant, d'une part, être introduite dans l'ouverture depuis le dessus du boîtier 10 de sorte que sa direction longitudinale s'étende sensiblement suivant la direction de la flèche 6 et, d'autre part, être entraînée en coulissement suivant une direction sensiblement parallèle à celle de la flèche 6.In its upper part, 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.

De manière avantageuse mais non représentée, les parois de l'évasement 15 sont renforcées pour éviter leur dégradation précoce due aux lames successivement introduites dans la fente 14. Du côté supérieur de chacune de ces parois, une ou plusieurs barrettes métalliques peuvent être prévues, en s'étendant en longueur de l'extrémité haute à l'extrémité basse de la paroi. De préférence, les extrémités longitudinales de chaque barrette sont directement surmoulées par la paroi correspondante de l'évasement, avec ajout d'un renflement de matière du côté inférieur de la paroi à des fins de renfort de la paroi et de tenue mécanique de la barrette.Advantageously, but not shown, the walls of the flare 15 are reinforced to prevent their early degradation due to the blades successively introduced into the slot 14. On the upper side of each of these walls, one or more metal bars may be provided, in extending in length from the upper end to the lower end of the wall. Preferably, 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 .

Comme représenté aux figures 3A et 3B, l'ouverture 14 délimite un plan de symétrie P sensiblement vertical sur les figures, par rapport auquel les parties gauche et droite du boîtier 10 sont sensiblement symétriques.As shown in FIGS. 3A and 3B, 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.

Dans sa partie inférieure, le boîtier 10 délimite un logement interne 16 représenté en pointillés aux figures 1 et 2A. Ce logement, ouvert vers le bas au niveau du chant d'extrémité inférieure du boîtier 10, est fermé, à l'état assemblé du dispositif 1, par une embase complémentaire 18. Comme représenté à la figure 1, des pions 20 de clipsage de l'embase ainsi que des vis 21 de solidarisation de l'embase sont prévus, de sorte que cette embase est fermement fixée à la partie inférieure du boîtier 10 lorsque le dispositif 1 est assemblé et utilisé, tout en permettant son dégagement lors de l'entretien de ce dispositif. Ces pions et ces vis peuvent être complétés par d'autres éléments de solidarisation et, de manière plus générale, diverses formes de ces moyens de solidarisation sont envisageables, en particulier des formes facilitant le positionnement relatif du boîtier 10 et de l'embase 18 lors de leur assemblage.In its lower part, 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. As shown in FIG. 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.

Pour affiler le tranchant 2 de la lame 3 par contact frottant, le dispositif 1 est muni de deux paires de tiges incurvées 22A et 22B. Ces tiges d'affilage présentent un diamètre sensiblement constant suivant leur longueur et sont de préférence réalisées en un acier inoxydable permettant un contact alimentaire. Leur surface externe est sensiblement lisse, les tiges étant traitées thermiquement pour augmenter leur dureté superficielle.To sharpen the cutting edge 2 of the blade 3 by rubbing contact, 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.

Vues suivant la flèche 6, les paires de tiges 22A et 22B se croisent en définissant entre elles une zone angulaire 24 de réception et d'application frottante de la lame 3. Cette zone 24 s'étend de part et d'autre du plan P. Plus précisément, comme représenté aux figures 3A et 3B, la lame 3 peut être placée dans cette zone de sorte qu'elle s'étende en longueur sensiblement suivant le plan P et que sa face 2A soit au contact des tiges 22A tandis que sa face 2B est au contact des tiges 22B.Views along the arrow 6, 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.

Les tiges 22A croisent les tiges 22B de manière alternée, c'est-à-dire que, suivant la flèche 6, se succèdent, au niveau du sommet de la zone 24, une première tige 22A, une première tige 22B, la seconde tige 22A et la seconde tige 22B. De la sorte, la partie du tranchant 2 frottée par ces tiges est calée latéralement, c'est-à-dire que les débattements de la lame 3 de part et d'autre du plan P sont fortement limités par les tiges.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. In this way, 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.

Les paires de tiges 22A et 22B sont articulées par rapport au boîtier 10. Chaque tige est, conjointement avec l'autre tige de sa paire, déplaçable par rapport au boîtier entre une position extrême initiale représentée aux figures 2A et 3A, et une position extrême finale représentée aux figures 2B et 3B. Pour passer de sa position initiale à sa position finale, chaque paire de tiges 22A, 22B décrit un mouvement de rotation autour d'un axe géométrique A-A, respectivement B-B. Les axes de rotation A-A et B-B sont symétriques par rapport au plan P et définissent un plan sensiblement perpendiculaire au plan P.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.

Lorsque les tiges 22A et 22B sont dans leur position extrême initiale, la zone 24 présente, vue suivant la flèche 6 comme à la figure 3A, un contour globalement en forme de V dont la pointe est dirigée vers le bas. Comme expliqué en détail ci-après, l'entraînement en rotation des tiges 22A, 22B est commandé par la poussée vers le bas de la lame 3 lorsque cette dernière est reçue dans la zone 24. Cet entraînement est synchronisé entre les deux paires de tiges, c'est-à-dire que l'entraînement en rotation d'une des paires de tiges provoque l'entraînement en rotation de l'autre paire de tiges sur une course identique, mais en sens opposé.When the rods 22A and 22B are in their initial extreme position, the zone 24 presents, seen along the arrow 6 as in FIG. 3A, a generally V-shaped outline whose tip is directed downwards. As explained in detail below, 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.

De la sorte, lorsque les tiges 22A et 22B passent de leur configuration extrême initiale à leur configuration finale, la forme en V de la zone 24 est sensiblement inchangée, la courbure des tiges étant dimensionnée pour que l'angle au sommet α du V présente une valeur sensiblement constante sur la course de déplacement des tiges 22A et 22B, entre leur position de la figure 2A et celle de la figure 2B. Cette valeur de l'angle α est de préférence égale à 60° environ, de sorte que, lorsque la lame 3 s'étend dans la zone 24 suivant le plan P, chacune des faces 2A, 2B de son tranchant 2 forme avec les tiges respectivement associées 22A et 22B un angle d'environ 30° vu suivant la flèche 6, et ce quel que soit la position des tiges synchronisées entre leurs deux positions extrêmes. Cette valeur d'angle de 30° correspond à un optimum en ce qui concerne la qualité et l'efficacité de l'affilage par frottement de chaque face du tranchant contre les tiges.In this way, when the rods 22A and 22B pass from their initial extreme configuration to their final configuration, the V-shaped shape of the zone 24 is substantially unchanged, the curvature of the rods being dimensioned so that the apex angle α 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 α 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.

Pour synchroniser les rotations des tiges 22A et 22B, le dispositif 1 présente une liaison mécanique de synchronisation entre ces tiges. A cet effet, les parties d'extrémité inférieure des tiges 22A, 22B de chaque paire sont solidarisées à des arbres respectifs 26A, 26B, de préférence par surmoulage des extrémités inférieures des tiges, pour garantir une meilleure hygiène et pour assurer une meilleure tenue mécanique ainsi qu'une plus grande rigidité. Pour améliorer l'immobilisation des tiges par rapport aux arbres de surmoulage 26A, 26B, les parties d'extrémité inférieure des tiges peuvent être localement aplaties par écrasement en plusieurs zones suivant la longueur des tiges, avant que la matière constituant les arbres ne soient appliquée pour enrober ces parties inférieures de tige. De la sorte, les tiges sont fermement retenues vis-à-vis des arbres au niveau de ces zones écrasées (non visibles sur les figures), qui bloquent les tiges notamment en rotation sur elles-mêmes.To synchronize the rotations of the rods 22A and 22B, the device 1 has a mechanical connection of synchronization between these rods. For this purpose, 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. To improve the immobilization of the rods with respect to the overmolding shafts 26A, 26B, 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.

Les arbres 26A, 26B définissent, de manière centrale, les axes géométriques de rotation A-A et B-B. En outre, chacun de ces arbres 26A et 26B délimite extérieurement une surface cylindrique 28A, 28B (figure 1) complémentaire de surfaces de portée semi-cylindriques correspondantes 30A, 30B et 32A, 32B délimitées respectivement par l'embase 18 et la partie inférieure du boîtier 10. Ainsi, les axes A-A et B-B sont fixes par rapport au boîtier en configuration montée du dispositif.The shafts 26A, 26B define, centrally, the geometric axes of rotation A-A and B-B. In addition, 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 Thus, the axes AA and BB are fixed relative to the housing in mounted configuration of the device.

Les parties d'extrémité distale 34A, 34B des arbres 26A, 26B s'étendent dans le logement interne 16 du boîtier 10 et présentent une section carrée, complémentaire de l'alésage central 36A, 36B de roues 38A, 38B, associées et agencées dans le logement 16. Chacune de ces roues présente, sur une partie de sa périphérie extérieure, une denture 40A, 40B. Les dentures des deux roues sont montées en prise l'une avec l'autre, de sorte que l'entraînement en rotation d'une des roues autour de son axe correspondant A-A, B-B provoque l'entraînement en rotation de l'autre roue autour de son axe, en sens opposé. Ainsi, lors de l'entraînement en rotation d'une des paires de tiges 22A, 22B, sa roue associée 38A, 38B est entraînée suivant le même mouvement de rotation et, par engrenage des dentures 40A, 40B, entraîne l'autre roue en rotation, mais en sens opposé, cet entraînement rotatif opposé étant alors transmis à l'autre paire de tiges, dont le mouvement est ainsi synchronisé à celui de la première paire de tiges.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. Thus, during the rotational drive of one of the pairs of rods 22A, 22B, its associated wheel 38A, 38B is driven in the same rotational movement and, by gearing of the teeth 40A, 40B, drives the other wheel by rotation, but in opposite directions, this opposite rotary drive then being transmitted to the other pair of rods, whose movement is thus synchronized with that of the first pair of rods.

Les positions extrêmes initiale et finale des tiges 22A et 22B sont imposées par des butées portées par les roues 38A et 38B. Ainsi, chaque roue 38A, 38B est munie d'une première butée 42A, 42B, globalement sous la forme d'une première aile radialement saillante du corps tubulaire de la roue, adaptée pour venir s'appuyer par sa face inférieure contre une surface correspondante 44A, 44B ménagée par la face supérieure du fond inférieur du couvercle 18 lorsque les tiges sont dans leur position initiale, comme représenté à la figure 3A. De même, chaque roue 38A, 38B est munie d'une seconde butée 46A, 46B, globalement sous la forme d'une seconde aile radialement saillante du corps de la roue et s'étendant approximativement à angle droit de l'aile formant la première butée 42A, 42B. Ces secondes butées 46A, 46B sont adaptées pour, lorsque les tiges sont dans leur position finale, comme représenté à la figure 3B, venir s'appuyer par leur face respectivement droite et gauche, c'est-à-dire leur face tournées vers le plan P, contre des surfaces respectives correspondantes 48A, 48B ménagées par un bras commun 49 venu de matière avec le boîtier 10 et s'étendant vers le bas en saillie de la face inférieure de la paroi supérieure délimitant le logement 16, de part et d'autre du plan P.The initial and final extreme positions of the rods 22A and 22B are imposed by stops carried by the wheels 38A and 38B. Thus, 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. Similarly, 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.

Avantageusement, pour des raisons de compacité et de résistance, les ailes formant les butées précitées 42A, 42B et 46A, 46B sont venues de matière avec le reste de la roue correspondante 38A, 38B, ces roues étant réalisées par exemple en un polyamide chargé de fibres de verre ou de carbone ou en une matière analogue.Advantageously, for reasons of compactness and strength, 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.

Le dispositif 1 comporte en outre deux ressorts de compression 50A, 50B situés dans le logement 16 et interposés respectivement entre le boîtier 10 et la première butée 42A de la roue 38A et entre le boîtier et la première butée 42B de la roue 38B. Autrement dit, chaque ressort est associé à l'une des roues dentées et agit directement sur elle par rapport au boîtier fixe. Plus précisément, chaque ressort 50A, 50B est agencé dans le logement 16 de sorte que l'extrémité supérieure du ressort est appuyée contre la face inférieure de la paroi supérieure délimitant le logement 16, tandis que son extrémité inférieure est appuyée sur la face supérieure de la butée en forme d'aile 42A, 42B. Chaque ressort exerce ainsi un effort élastique EA, respectivement EB, qui tend à déplacer la butée correspondante 42A, 42B vers sa surface d'appui associée 44A, 44B de l'embase 18. Par conséquent, ces ressorts permettent le rappel automatique des tiges 22A, 22B vers leur position extrême initiale.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. In other words, each spring is associated with one of the gears and acts directly on it relative to the fixed housing. More specifically, 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.

En outre, chaque ressort 50A, 50B s'oppose à la rotation de sa roue correspondante lorsque les tiges associées sont entraînées vers leur position extrême finale, puisque l'intensité de l'entraînement en rotation des tiges 22A, 22B doit être suffisante pour vaincre les efforts EA et EB et comprimer davantage les ressorts. Autrement dit, ces ressorts retiennent de manière amortie les roues 38A, 38B lorsque les tiges sont déplacées de leur position initiale vers leur position finale.In addition, 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.

Le dispositif 1 comporte en outre, de manière optionnelle, un socle 60 permettant la fixation du dispositif à un plan d'utilisation, tel qu'un bord de table de travail. L'embase 18 est immobilisée sur ce socle en étant coincée au niveau de ses côtés gauche et droit par des pions correspondants 62 solidarisés fermement au socle. Avantageusement, ce socle est muni de perforations 64 permettant son ancrage, de préférence amovible, au plan d'utilisation précité.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. Advantageously, this base is provided with perforations 64 allowing its anchoring, preferably removable, to the aforementioned use plan.

L'utilisation du dispositif 1 va maintenant être décrite, essentiellement en regard des figures 2A, 2B, 3A et 3B.The use of the device 1 will now be described, essentially with reference to FIGS. 2A, 2B, 3A and 3B.

Dans un premier temps, on considère que les tiges 22A et 22B sont dans leur position initiale des figures 2A et 3A. La lame 3 est alors introduite dans la zone 24 délimitée entre les parties hautes de ces tiges, l'introduction de la lame étant guidée par l'ouverture en V 14 du boîtier 10. A cet effet, l'évasement supérieur 15 de l'ouverture 14 est avantageusement prévu plus haut que la zone 24. La pointe de la lame est disposée du côté distal du dispositif, en étant la plus éloignée possible de l'utilisateur, de sorte que la partie d'extrémité proximale de la lame 3 est placée dans la zone 24.At first, it is considered that 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. For this purpose, 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.

L'utilisateur impose alors à la lame 3 du couteau 4 un mouvement de haut en bas indiqué par une flèche 70 aux figures 2A, 2B, 3A et 3B, tout en tirant le couteau vers lui comme indiqué par une flèche 71. Ce mouvement est guidé par l'ouverture en V 14 du boîtier 10. Lors du déplacement du couteau 4, le dispositif 1 est immobilisé, en étant tenu à la main par l'utilisateur, au niveau d'une des poignées 12A, 12B, ainsi qu'en étant éventuellement fixé à un plan de travail au moyen du socle 60. On remarquera que, en raison de sa symétrie globale par rapport au plan P, le dispositif 1 est tout aussi facilement sollicité par un utilisateur droitier que gaucher.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. During the movement of the knife 4, 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.

Durant ce mouvement, les deux faces 2A et 2B du tranchant 2 de la lame sont pressées et frottées respectivement contre les tiges 22A et 22B, permettant l'affilage simultané des deux faces du tranchant. En outre, l'entraînement vers le bas (flèche 70) de la lame provoque l'entraînement en rotation des tiges 22A et 22B autour de leurs axes respectifs A-A et B-B, comme indiquée par les flèches respectives 72A et 72B. Ces deux mouvements d'entraînement en rotation sont synchronisés par les dentures 40A et 40B qui engrènent l'une sur l'autre, de sorte que l'intensité d'application et de frottement de chacune des deux faces du tranchant contre les tiges 22A et 22B est uniformisée, aucune des deux paires de tiges ne pouvant être entraînées plus vite que l'autre.During this movement, the two faces 2A and 2B of the cutting edge 2 of the blade are pressed and rubbed respectively against the rods 22A and 22B, allowing the simultaneous sharpening of both sides of the cutting edge. In addition, the downward drive (arrow 70) of the blade causes rotation of the rods 22A and 22B about their respective axes AA and BB, as indicated by the respective arrows 72A and 72B. These two rotational drive movements are synchronized by the teeth 40A and 40B which mesh with one another, so that the intensity of application and friction of each of the two faces of the cutting edge against the rods 22A and 22B is standardized, neither of the two pairs of rods can be driven faster than the other.

En raison de leur raideur, dimensionnée en conséquence, les ressorts 50A et 50B s'opposent de manière amortie au déplacement des tiges, ce qui se traduit, pour l'utilisateur, par une certaine résistance des tiges 22A et 22B à se dérober sous l'appui vers le bas de la lame 3. De la sorte, le tranchant 2 est frotté de manière efficace contre ces tiges pour reformer son fil.Because of their stiffness, sized accordingly, 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.

Comme l'utilisateur tire également vers soi le couteau 4 (flèche 71), toute la longueur du tranchant 2 est affilée durant le mouvement vers le bas de la lame 3, jusqu'à ce que la lame ait poussé les tiges 22A, 22B dans leur position finale, comme représenté aux figures 2B et 3B.As the user also pulls the knife 4 (arrow 71) towards him, the entire length of the cutting edge 2 is sharpened during the downward movement of the blade 3, until the blade has pushed the rods 22A, 22B into position. their final position, as shown in Figures 2B and 3B.

En poursuivant la traction du couteau 4 vers lui, l'utilisateur dégage la pointe de la zone 24. Les ressorts 50A et 50B repoussent alors élastiquement les roues 38A et 38B suivant des mouvements de rotation respectifs opposés à ceux qu'elles ont chacune décrits durant l'abaissement de la lame, ramenant alors les tiges 22A et 22B dans leur position initiale des figures 2A et 2B.By continuing the traction of the knife 4 towards him, the user releases the tip of the zone 24. The springs 50A and 50B then elastically push the wheels 38A and 38B in respective rotational movements opposite to those they have each described during lowering the blade, then bringing the rods 22A and 22B back to their original position in FIGS. 2A and 2B.

Les pièces d'usure du dispositif 1, c'est-à-dire essentiellement les tiges 22A, 22B, les roues dentées 38A, 38B et les ressorts 50A, 50B sont facilement démontables pour être nettoyées et, si nécessaire, changées.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.

De plus, le recours à des pièces à interactions exclusivement mécaniques permet au dispositif 1 d'être rapidement nettoyé et d'être particulièrement léger, facilitant sa manipulation et son transport d'un lieu d'utilisation à un autre.In addition, 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.

Divers aménagements et variantes au dispositif 1 décrit ci-dessus sont en outre envisageables :

  • plutôt que de prévoir deux tiges 22A et deux tiges 22B, des nombres différents de tiges d'affilage peuvent être envisagés ; ainsi, avec une tige d'un côté et deux tiges de l'autre, l'effet de calage de la lame est obtenu ; cependant, avec une seule tige de chaque côté pour frotter l'une des faces 2A, 2B du tranchant 2, les risques de mauvais positionnement de la lame 3 sont augmentés puisque l'utilisateur peut, par mégarde, écarter du plan P la lame 3 vers la gauche ou vers la droite, tandis que plus de deux tiges de chaque côté de la lame induit un surcoût du dispositif ; et/ou
  • des paires de tiges analogues aux paires de tiges 22A et 2BB décrites ci-dessus peuvent être ajoutées du côté distal du boîtier 10, en étant synchronisées dans leur déplacement par le même mécanisme à roues dentées 38A, 38B ; de cette façon, des lames peuvent être affilées par le dispositif en y étant introduites aussi bien d'un côté du dispositif que de l'autre, l'utilisateur n'étant pas obligé de se placer d'un côté spécifique du boîtier 10.
Various arrangements and variants of the device 1 described above are furthermore conceivable:
  • rather than providing two rods 22A and two rods 22B, different numbers of sharpening rods can be envisaged; thus, with a rod on one side and two rods on the other, the wedging effect of the blade is obtained; however, with only one rod on each side to rub one of the faces 2A, 2B of the cutting edge 2, the risks of misplacement of the blade 3 are increased since the user can inadvertently move the blade 3 away from the plane P to the left or to the right, while more than two rods on each side of the blade induces an additional cost of the device; and or
  • pairs of rods similar to the pairs of rods 22A and 2BB described above may be added to the distal side of the housing 10, being synchronized in their movement by the same gear mechanism 38A, 38B; in this way, blades can be sharpened by the device by being introduced to one side of the device as well as the other, the user is not obliged to be placed on a specific side of the housing 10.

Claims (11)

Dispositif (1) pour affiler un tranchant de lame (2), comprenant un premier (22A) et un second (22B) moyens d'affilage, distincts l'un de l'autre et respectivement adaptés pour affiler simultanément l'une et l'autre des deux faces (2A, 2B) du tranchant (2) par contact frottant contre ces faces, caractérisé en ce qu'il comporte également des moyens (26A, 26B, 38A, 38B) de liaison mécanique entre les premier (22A) et second (22B) moyens d'affilage, adaptés pour transmettre de manière synchronisée le déplacement de l'un des premier et second moyens d'affilage à l'autre lorsque le tranchant est frotté contre ces moyens d'affilage et entraîne ces derniers en déplacement.Device (1) for sharpening a blade edge (2), comprising a first (22A) and a second (22B) sharpening means, distinct from each other and respectively adapted to sharpen simultaneously the one and the other of the two faces (2A, 2B) of the cutting edge (2) by frictional contact against these faces, characterized in that it also comprises means (26A, 26B, 38A, 38B) for mechanical connection between the first (22A) and second (22B) 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 causes them to displacement. Dispositif selon la revendication 1, caractérisé en ce que, lorsque le tranchant (2) est frotté contre les premier (22A) et second (22B) moyens d'affilage et entraîne ces derniers en déplacement, lesdits moyens de liaison (26A, 26B, 38A, 38B) sont adaptés pour entraîner les premier et second moyens d'affilage sur une course identique mais en des sens opposés.Device according to claim 1, characterized in that , when the cutting edge (2) is rubbed against the first (22A) and second (22B) sharpening means and drives the latter in displacement, said connecting means (26A, 26B, 38A, 38B) are adapted to drive the first and second sharpening means on an identical stroke but in opposite directions. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que le premier moyen d'affilage (22A) et le second moyen d'affilage (22B) forment entre eux une zone angulaire (24) de réception et de contact frottant avec le tranchant (2), l'angle au sommet (α) de cette zone ayant une valeur sensiblement constante lors des déplacements relatifs synchronisés des deux moyens d'affilage, ladite valeur d'angle étant de préférence égale à 60° environ.Device according to one of claims 1 or 2, characterized in that the first sharpening means (22A) and the second sharpening means (22B) form between them an angular zone (24) for receiving and rubbing contact with the cutting edge (2), the apex angle (α) of this zone having a substantially constant value during the synchronized relative movements of the two sharpening means, said angle value being preferably equal to approximately 60 °. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que chacun des premier et second moyens d'affilage comporte au moins deux tiges (22A, 22B) le long desquelles la face correspondante (2A, 2B) du tranchant (2) est destinée à être frottée pour être affilée, les tiges du premier moyen d'affilage croisant de manière alternée les tiges du second moyen d'affilage.Device according to any one of the preceding claims, characterized in that each of the first and second sharpening means comprises at least two rods (22A, 22B) along which the corresponding face (2A, 2B) of the cutting edge (2) is intended to be rubbed to be sharpened, the rods of the first sharpening means intersecting alternately with the rods of the second cutting means; 'sharpening. Dispositif selon la revendication 4, caractérisé en ce que les tiges du premier et du second moyens d'affilage (22A, 22B) sont reliées aux moyens de liaison (26A, 26B) par surmoulage.Device according to claim 4, characterized in that the rods of the first and second sharpening means (22A, 22B) are connected to the connecting means (26A, 26B) by overmolding. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de liaison comportent un système d'engrenage (38A, 38B) incluant une première portion dentée (40A) liée en rotation au premier moyen d'affilage (22A) et une seconde portion dentée (40B) liée en rotation au second moyen d'affilage (22B).Device according to any one of the preceding claims, characterized in that the connecting means comprise a gear system (38A, 38B) including a first toothed portion (40A) rotatably connected to the first sharpening means (22A) and a second toothed portion (40B) rotatably connected to the second sharpening means (22B). Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de liaison comportent des butées (42A, 42B, 46A, 46B) de blocage des premier (22A) et second (22B) moyens d'affilage dans deux positions d'utilisation respectives extrêmes.Device according to any one of the preceding claims, characterized in that the connecting means comprise abutments (42A, 42B, 46A, 46B) for locking the first (22A) and second (22B) sharpening means in two positions. extreme use. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre des moyens mécaniques (50A, 50B) de retenue souple des premier (22A) et second (22B) moyens d'affilage, adaptés pour s'opposer de manière amortie aux déplacements des premier et second moyens d'affilage lors du frottement du tranchant (2) contre ces moyens d'affilage.Device according to any one of the preceding claims, characterized in that it further comprises mechanical means (50A, 50B) for flexible retention of the first (22A) and second (22B) sharpening means, adapted to oppose damped to the displacements of the first and second sharpening means during the friction of the cutting edge (2) against these sharpening means. Dispositif selon la revendication 8, caractérisé en ce que les moyens de retenue (50A, 50B) agissent directement sur les moyens de liaison (38A, 38B).Device according to claim 8, characterized in that the retaining means (50A, 50B) act directly on the connecting means (38A, 38B). Dispositif selon l'une des revendications 8 ou 9, caractérisé en ce que les moyens de retenue comportent au moins un élément élastique, notamment un ressort (50A, 50B), adapté pour, après déplacement des premier (22A) et second (22B) moyens d'affilage depuis des positions d'utilisation respectives initiales, rappeler les premier et second moyens d'affilage vers leur position initiale.Device according to one of claims 8 or 9, characterized in that the retaining means comprise at least one elastic element, in particular a spring (50A, 50B), adapted for, after displacement of the first (22A) and second (22B) sharpening means from initial respective use positions, recall the first and second sharpening means towards their initial position. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte un boîtier démontable (10) de réception et de support des moyens de liaison (26A, 26B, 38A, 38B).Device according to any one of the preceding claims, characterized in that it comprises a removable housing (10) for receiving and supporting connecting means (26A, 26B, 38A, 38B).
EP06356040A 2005-04-26 2006-04-07 Device for sharpening blade edges Not-in-force EP1716975B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0504176A FR2884746B1 (en) 2005-04-26 2005-04-26 DEVICE FOR AFFILIATING A BLADE SHARPENER

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EP1716975A1 true EP1716975A1 (en) 2006-11-02
EP1716975B1 EP1716975B1 (en) 2007-11-14

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EP (1) EP1716975B1 (en)
AT (1) ATE378150T1 (en)
DE (1) DE602006000230T2 (en)
FR (1) FR2884746B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937179A1 (en) * 2014-04-23 2015-10-28 Dassaud Fils Device for sharpening a blade of a manual cutting tool

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
RU2004121670A (en) * 2001-12-23 2005-07-20 ПРЕТОРИУС Гейнрих Стигер (ZA) SHARPENING DEVICE FOR CUTTING TOOLS

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 (en) * 2014-04-23 2015-10-28 Dassaud Fils Device for sharpening a blade of a manual cutting tool
FR3020299A1 (en) * 2014-04-23 2015-10-30 Dassaud Fils DEVICE FOR AFFILING A TOOL BLADE OF A CUTTING TOOL

Also Published As

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

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