WO2015173518A1 - Sharpening device having abrasive belts arranged crosswise - Google Patents

Sharpening device having abrasive belts arranged crosswise Download PDF

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Publication number
WO2015173518A1
WO2015173518A1 PCT/FR2015/051266 FR2015051266W WO2015173518A1 WO 2015173518 A1 WO2015173518 A1 WO 2015173518A1 FR 2015051266 W FR2015051266 W FR 2015051266W WO 2015173518 A1 WO2015173518 A1 WO 2015173518A1
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WO
WIPO (PCT)
Prior art keywords
sharpening
strips
support
abrasive
sharpening device
Prior art date
Application number
PCT/FR2015/051266
Other languages
French (fr)
Inventor
Jean-Pierre Bodard
Original Assignee
Bobet Materiel
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 Bobet Materiel filed Critical Bobet Materiel
Priority to EP15732303.1A priority Critical patent/EP3142830B1/en
Publication of WO2015173518A1 publication Critical patent/WO2015173518A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/18—Accessories
    • B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/006—Machines or devices using grinding or polishing belts; Accessories therefor for special purposes, e.g. for television tubes, car bumpers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives

Definitions

  • the present invention relates to the general field of devices for sharpening the blades of cutting tools like knives or the like.
  • a sharpening device comprising at least two abrasive belts each provided with an abrasive active top surface and a bottom surface, which strips are offset longitudinally and arranged in a cross to form a crossing line. defining, on one side, a sharpening wedge formed by said moving top surfaces of said strips, and on the other side, an underlying dihedral, formed by said moving bottom surfaces of said strips. And it still relates to a sharpening process by means of such a device.
  • the sharpening of a blade can be performed by an operator on a stone wheel, belt, or other.
  • the operation requires experience and good dexterity in order to obtain the desired profile of the cut, ie generally a profile with convex edges, called “curved”, or “in shell", allowing a clean cut and a long service life of the blade wire.
  • US-2,222,361 or the embodiment of Figure 10 of WO-2010007171, provides a mobile abrasive endless belt device each provided with an abrasive top surface and a bottom surface.
  • These documents more particularly describe devices in which the moving strips are longitudinally offset and arranged in a cross, to form a cross line which defines, on one side, a sharpening wedge (formed by the moving top surfaces of said strips ), and on the other side, an underlying dihedral (formed by the moving bottom surfaces of the bands).
  • these sharpening devices are formed of three abrasive belts: a first band guided by a driving pulley at the bottom and a deflection pulley at the top, and two second strips, arranged longitudinally on either side of the first, both guided by said lower drive pulley, and by another upper idler pulley.
  • the grinding operation is carried out by positioning the cutting edge of the tool in the sharpening wedge, against the crossing line of the strips, in particular in the median plane of this sharpening wedge.
  • a support roller adjustable in position in a vertical plane is provided at the level of the underlying dihedron, with its active surface in contact with the bottom surfaces of the strips. , to allow adjustment of the angle of the sharpening wedge.
  • two support rods are provided at the underlying dihedral, bearing against the endless belts, to allow the angle of the sharpening wedge to be changed as a function of the support applied to the cutting edge of the tool to be sharpened.
  • the corresponding devices can only make it possible to obtain such a curved cutting profile profile, only by the dexterity of the operator, or else from several grinding steps, by modifying the sharpening angle by successions of adjustments of the support roller.
  • the present invention proposes a simple and original solution for improving the sharpening devices as described in the documents JP-2007 307658, WO-2010007171 or US-2 222 361, in order to automatically obtain a curved profile of cutting edge, by means of simple movements of the blade in the median plane of the sharpening dihedron.
  • the present invention provides the presence of support means against the at least one of the bottom surfaces of the strips, at the underlying dihedral, which are adapted to alternately vary the angle of the sharpening wedge during the movement of said bands.
  • the bearing means in question are adapted to generate reciprocating movements whose frequency, per second, is greater than 10, and preferably greater than 20.
  • the corresponding support means consist of a support roller mounted to rotate about an axis and whose active surface cooperating with the surfaces of the bottom of the strips, comprises at least one non-centered zone on said axis of rotation.
  • these support means consist of a bearing roller whose active surface is cylindrical, which support roller is rotatably mounted about an axis that is off-center with respect to the axis of said cylindrical active surface.
  • the axis of rotation of the support roller extends parallel to or substantially parallel to the crossing line of the strips, and is located in the plane or substantially in the median plane of the sharpening wedge.
  • the sharpening device comprises means for adjusting the position of the support roller, in the plane or substantially in the median plane of the sharpening wedge.
  • adjustment means then advantageously consist of an elongate slot which extends perpendicularly to the axis of said support roller, along which said roller is movable, and on which said roller can be locked in position, by any means of adapted lock.
  • the support roller is advantageously mounted idly about its axis of rotation, its active peripheral surface being in contact with said underlying dihedral formed by the undersides of said strips, and said support roller being driven in rotational movement. by said bottom surfaces of said moving bands.
  • the abrasive belts are wound on a common drive pulley, arranged on the side of the underlying dihedral, and on return pulleys, arranged on the side of the sharpening wedge.
  • the sharpening device advantageously comprises, on the one hand, a first abrasive belt guided by a driving pulley and by a first return pulley, and on the other hand, two second abrasive belts, arranged longitudinally on both sides. other of the first abrasive belt, and guided by said driving pulley and another pulley.
  • the axes of rotation of the drive pulley, the return pulleys and the support roller are then advantageously parallel to each other, and the median plane of the sharpening dihedron extends vertically or substantially vertically, the pulleys of referral being provided in the upper part, and the driving pulley in the lower part.
  • the sharpening device comprises a support frame on which said return pulleys and said bearing means are mounted, said driving pulley being rotated by a motor driven by a carriage which is slidably mounted on a sliding system provided on said support frame, which slides are adapted to ensure automatic tensioning of said bands by the weight or at least a portion of the weight of said engine.
  • This feature allows an automatic tensioning of the bands, and allows, if necessary, a rapid change of these bands.
  • Said slides preferably extend in a plane perpendicular to the axis of rotation of the driving pulley and the median plane of the sharpening wedge.
  • said support frame preferably comprises a support plate from one of the faces of which extend cantilevered said return pulleys and said support means, and against the other face of which are provided said slides.
  • the plane in which the abrasive belts extend is inclined forwards with respect to the vertical, at an angle of between 25 ° and 45 °, in order to optimize the ergmomy of the operation of 'sharpening.
  • the invention further relates to a sharpening method for a knife-like cutting tool blade or the like, by means of at least two moving abrasive belts each provided with an abrasive active top surface and a bottom surface, which strips are longitudinally offset and arranged in a cross to form a cross line defining, on one side, a sharpening wedge formed by said moving top surfaces of said strips, and on the other side, an underlying dihedral formed by said moving bottom surfaces of said strips, which method is characterized by alternately varying the angle of said sharpening wedge during movement of said strips.
  • this method consists in alternately varying the angle of said sharpening wedge in reciprocating movements whose frequency per second is greater than 10, and preferably greater than 20.
  • FIG. 2 is a perspective view from the rear of the sharpening device of Figure 1;
  • FIG. 3 shows the sharpening device of Figures 1 and 2 seen from the front
  • FIG. 4 is a top view of the sharpening device of Figures 1 to 3;
  • FIG. 5 is a side view of the sharpening device of Figures 1 to 4;
  • FIG. 6 is a partial perspective view from the rear of the sharpening device of Figures 1 to 5, almost all of its support frame has been removed;
  • FIG. 7 is a diagrammatic perspective view of the abrasive belts of the sharpening device of FIGS. 1 to 6, wound around their drive pulley and their return pulley, and associated with the support roller ensuring the alternative variation of the angle of sharpening dihedral;
  • FIG. 8 is a front view of the strip / pulley / support roller assembly of FIG. 5;
  • FIG. 9 is an isolated front view of the support roller, illustrating its active cylindrical surface off-center.
  • the sharpening device 1 illustrated in Figures 1 to 9 comprises three abrasive strips 2, 3 and 4, in the form of endless bands.
  • a first band 2 wraps around a lower drive pulley 5 and around a first top 6 pulley; and two second strips 3 and 4 are wound around said lower drive pulley 5 and around a second return pulley 7, parallel to each other, and arranged longitudinally on either side of said first strip 2.
  • the endless belts 2, 3 and 4 are advantageously identical to each other. They comprise an abrasive top surface 2a, 3a, 4a active and a bottom surface 2b, 3b, 4b advantageously non-abrasive.
  • Any abrasive belt known to those skilled in the art can be used for the implementation of the sharpening device 1.
  • the axis 5 'of the common drive pulley 5 extends parallel to the axis 6', 7 'of the two return pulleys 6, 7.
  • the two return pulleys 6 and 7 are arranged in the same horizontal plane, their axes 6 ', 7' being placed symmetrically with respect to the vertical plane through which the axis 5 'of the driving pulley 5 passes.
  • the abrasive belt 2, on the one hand, and the abrasive belts 3 and 4, on the other hand, are thus arranged in a cross, that is to say that they intersect to form a cross line 8.
  • This crossing line 8 defines, on one side (in the upper part), an upper sharpening dihedron 9 formed by the abrasive top surfaces 2a, 3a, 4a of strips 2, 3, 4, and on the other side ( in the lower part) a lower dihedron 10, called "underlying dihedral", formed by the bottom surfaces 2b, 3b, 4b of the strips 2, 3 and 4.
  • the upper return pulleys 6 and 7 are rotatably mounted on a support frame 1 1 of the sharpening device 1.
  • the driving pulley 5 here has a diameter of between 3 and 4 times the diameter of the return pulleys 6 and 7; preferably the driving pulley 5 and the return pulleys 6, 7 comprise peripheral grooves adapted to hold in position the strips 2, 3 and 4 that they guide.
  • the driving pulley 5 is rotated by a motor 12, preferably an electric motor.
  • the sharpening device 1 comprises an on / off switch 12a, for starting or stopping the operator 12, visible in Figures 2, 4 and 5.
  • this motor 12 is carried by a carriage 13 which is slidably mounted on a slide system 14 formed on the support frame 1 1, in a plane perpendicular to or substantially perpendicular to the axis of the driving pulley 5 (FIG. 6).
  • support means 15 which are arranged, according to the present invention, to allow a variation, alternatively, of the angle of the dihedron 9 during the movement of the abrasive belts 2, 3, 4, driven by the driving pulley 5.
  • These support means here consist of a support roller 15 mounted idler in rotation about an axis 15a integral with the frame 1 1, and whose active surface 15b (corresponding to its peripheral surface) comprises at least one zone which is off-center by report to this axis 15a.
  • this support roller 15 comprises an active surface 15b which is cylindrical, which cylindrical surface 15b is not centered on the axis of rotation 15a.
  • an active surface 15b which is cylindrical
  • cylindrical surface 15b is not centered on the axis of rotation 15a.
  • a virtual circle 15c centered on the axis 15a has been drawn in FIG. 9, in dashed lines.
  • the cylindrical active surface 15b of the support roller 15 is placed in contact with the aforementioned underlying dihedron 10, formed by the bottom faces 2b, 3b, 4b of the strips 2, 3 and 4.
  • This active surface is preferably knurled. to optimize the rotational drive of the roller 15.
  • this support roller 15 is rotated about its axis 15a by the friction, on its periphery, of the bottom surface 2b, 3b, 4b of the different strips 2, 3, 4, themselves. driven by the motorized pulley 5.
  • a drive of the motorized pulley 5 in the clockwise direction, according to the orientation arrow 16 ensures the driving of the strips 2, on the one hand, and 3, 4, on the other hand, according to the orientation arrows 17 and 18, respectively.
  • the return pulleys 6 and 7 rotate here in a clockwise direction, driven by said strips 2, 3 and 4, and the support roller 15 also rotates clockwise, as illustrated by the orientation arrow 19.
  • the sharpening wedge 9 comprises a median plane P on either side of which are disposed the return pulleys 6, 7 and in which the axis 15a of the support roller 15 and the axis 5 'of the driving pulley 5. This sharpening wedge 9 is located above the cross line 8, the latter being situated above the underlying dihedron 10, the support roller 15 and the driving pulley 5.
  • the movement of the strips 2 and 3, 4 allows an operator to perform the sharpening of a tool blade placed at the sharpening wedge 9, with its cutting edge bearing against the crossing line 8 of the strips 2, 3 and 4.
  • the cutter "curved" is obtained automatically because of the alternating variations of the positioning of the plane of the active surface 2a, 3a, 4a of the strips 2 and 3, 4, thanks to the rotation of the off-axis roller 15.
  • the alternative displacement of the plane of the strips 2, 3, 4 at the sharpening wedge 9, and therefore the variation of the angle of the sharpening wedge 9, can be adapted according to the result that is desired, in particularly by modifying the dimensional characteristics of the support means 15 and / or their positioning.
  • the decentering of the axis 15a of the support roller 15 relative to the axis of its cylindrical active surface 15b may be a few tenths of a millimeter, for example of the order of 0.2 to 1 mm, for a support roller 15 having a diameter of 42 mm, a drive pulley 5 having a diameter of 100 mm and return pulleys 6, 7 having a diameter of 33 mm.
  • the value of the alternative angular variation sought for the sharpening wedge 9 can be determined by adjusting the position of the support roller 15 in the plane or substantially in the plane of said sharpening wedge 9.
  • the corresponding adjustment means may consist of an elongated slot, formed perpendicularly to the axis of the support roller 15, in the plane or substantially in the median plane P of the dihedron 9, along which said roller 15 is movably mounted, and on which said roller 15 can be locked in position by any suitable locking means (for example by a locking system of the screw-nut type).
  • the bearing means 15 in combination with the driving characteristics of the strips 2, 3, 4 (in particular their linear speed) are advantageously adapted to generate reciprocating movements whose frequency is greater than 10 per second, and preferably greater at 20 per second, and more preferably between 30 and 70 per second.
  • the supporting frame 1 1 of the sharpening device 1 comprises in particular a lower base 20 intended to rest on any suitable support, for example a table or a receiving tray, from which two side sides 21 extend upwards. connected by a spacer plate 22.
  • the two lateral sides 21 form part of the peripheral casing of the sharpening device 1.
  • the spacer plate 22 extends inside the device. It serves in particular to support the axes of the two return pulleys 6 and 7, and the axis of the support roller 15, which extend cantilever from one of its faces; its opposite face serves as support slides 14 guiding the carriage 13 ( Figure 2).
  • This support plate 22 may comprise the aforementioned elongate light for adjusting the positioning of the support roller 15, the axis of the latter being then equipped with the associated removable locking means (for example in the form of screw-nut system).
  • This support plate 22 also has a median upper opening 23 which does not interfere with the movements of the tool blade that is to be sharpened during its grinding operation, as well as a lower opening 24 for free movement. in translation of the carriage assembly 13 / motorization 12 / pulley 5, along the aforementioned slide system 14.
  • the support plate 22 advantageously extends in a plane inclined forwards when the sharpening device 1 is in position on its table or receiving plate, so that the different strips 2, 3, 4 extend in a direction. parallel inclined plane, in order to improve the ergonomics of sharpening operations.
  • the angle of inclination corresponding to 1 with respect to the vertical, visible in FIG. 5, can be of the order of 25 ° to 45 °.
  • the sharpening device 1 advantageously comprises a peripheral housing adapted to protect its constituent functional elements, as well as the operator responsible for sharpening a tool blade.
  • This peripheral casing includes in particular a front part to hide the driving pulley 5 and the support roller 15, as well as a rear part to hide the motorization 12, which do not appear in FIGS. 1 to 6 to facilitate the understanding of the structure of the sharpening device 1.
  • front and rear housing parts are preferably provided removable.
  • a guide-blade device 26 in the general shape of Vé whose tip is open downwards.
  • an abutment structure 27, section Vee provides protection of the internal mechanics against dust attacks related to sharpening, and against possible blade blows.
  • This abutment structure 27 is preferably made of a non-aggressive material for the blade, for example polypropylene; it can be secured to the rear portion of the protective housing.
  • Fixed disks 28 are positioned at the cantilevered end of the axes of the return pulleys 6 and 7, to protect these pulleys 6 and 7 against the aggressions of the blades being sharpened.
  • the support means 15 may be in a form other than a rotary roller with decentred active surface.
  • these support means 15 may consist of an elongate section roller, for example oval, or alternatively of a structure that is movable in horizontal translation, in reciprocating movements, and whose ends come to bear against the surfaces below 2b; 3b, 4b strips 2; 3, 4 for alternately varying the angle of the sharpening wedge 9.
  • the support means 15 may also be adapted to come into contact with only one of said strips 2, 3, 4, or two of them.

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

Abstract

The present invention relates to a sharpening device (1) for a blade of a cutting tool such as a knife or similar, which sharpening device comprises at least two moving abrasive belts (2; 3, 4), each having a top active abrasive surface and a bottom surface, which belts (2; 3, 4) are longitudinally offset and arranged crosswise to form a crossing line (8) defining, on one side, a sharpening dihedron (9) formed by said moving top surfaces of said belts (2; 3, 4), and on the other side, an underlying dihedron (10) formed by said moving bottom surfaces of said belts (2; 3, 4). In accordance with the invention, said sharpening device comprises means (15) of bearing against one of said bottom surfaces of said belts (2; 3, 4), at said underlying dihedron (10), which bearing means (15) are able to vary the angle of said sharpening dihedron (9) in an alternating manner, during the movement of the belts (2, 3, 4).

Description

Dispositif d'affûtage à bandes abrasives disposées en croix  Sharpening device with abrasive belts arranged in a cross
DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTION La présente invention concerne le domaine général des dispositifs pour affûter les lames d'outils coupants type couteaux ou similaires. TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention relates to the general field of devices for sharpening the blades of cutting tools like knives or the like.
Elle concerne plus particulièrement un tel dispositif d'affûtage comprenant au moins deux bandes abrasives mobiles munies chacune d'une surface de dessus active abrasive et d'une surface de dessous, lesquelles bandes sont décalées longitudinalement et disposées en croix pour former une ligne de croisement définissant, d'un côté, un dièdre d'affûtage formé par lesdites surfaces de dessus en mouvement desdites bandes, et de l'autre côté, un dièdre sous- jacent, formé par lesdites surfaces de dessous en mouvement desdites bandes. Et elle concerne encore un procédé d'affûtage au moyen d'un tel dispositif.  It relates more particularly to such a sharpening device comprising at least two abrasive belts each provided with an abrasive active top surface and a bottom surface, which strips are offset longitudinally and arranged in a cross to form a crossing line. defining, on one side, a sharpening wedge formed by said moving top surfaces of said strips, and on the other side, an underlying dihedral, formed by said moving bottom surfaces of said strips. And it still relates to a sharpening process by means of such a device.
ARRIERE-PLAN TECHNOLOGIQUE  BACKGROUND
Pour que la lame d'un outil tranchant tel qu'un couteau conserve le bon pouvoir de coupe, il est nécessaire de la soumettre à des opérations d'affilage régulières et aussi à des opérations d'affûtage, lorsque l'affilage ne restitue plus suffisamment de pouvoir de coupe.  So that the blade of a cutting tool such as a knife retains the good cutting power, it is necessary to subject it to regular sharpening operations and also to sharpening operations, when the sharpening does not restore sufficient cutting power.
L'affûtage d'une lame peut être réalisé par un opérateur, sur une meule à pierre, à bande, ou autre.  The sharpening of a blade can be performed by an operator on a stone wheel, belt, or other.
Dans ce cas, l'opération nécessite de l'expérience et une bonne dextérité pour obtenir le profil de taillant recherché, à savoir généralement un profil à bords convexes, dit « bombé », ou « en obus », permettant une découpe nette et une longue durée de vie du fil de la lame.  In this case, the operation requires experience and good dexterity in order to obtain the desired profile of the cut, ie generally a profile with convex edges, called "curved", or "in shell", allowing a clean cut and a long service life of the blade wire.
Pour faciliter ces opérations d'affûtage, les documents JP-2007 307658, To facilitate these sharpening operations, the documents JP-2007 307658,
US-2 222 361 , ou encore le mode de réalisation de la figure 10 du document WO- 2010007171 , proposent un dispositif du type à bandes sans fin abrasives mobiles munies chacune d'une surface de dessus abrasive et d'une surface de dessous. Ces documents décrivent plus particulièrement des dispositifs dans lesquels les bandes mobiles sont décalées longitudinalement et disposées en croix, pour former une ligne de croisement qui définit, d'un côté, un dièdre d'affûtage (formé par les surfaces de dessus en mouvement desdites bandes), et de l'autre côté, un dièdre sous-jacent (formé par les surfaces de dessous en mouvement des bandes). US-2,222,361, or the embodiment of Figure 10 of WO-2010007171, provides a mobile abrasive endless belt device each provided with an abrasive top surface and a bottom surface. These documents more particularly describe devices in which the moving strips are longitudinally offset and arranged in a cross, to form a cross line which defines, on one side, a sharpening wedge (formed by the moving top surfaces of said strips ), and on the other side, an underlying dihedral (formed by the moving bottom surfaces of the bands).
En l'occurrence, ces dispositifs d'affûtage sont formés de trois bandes abrasives : - une première bande guidée par une poulie motrice en partie basse et par une poulie de renvoi en partie haute, et - deux secondes bandes, disposées longitudinalement de part et d'autre de la première, guidées toutes deux par ladite poulie motrice inférieure, et par une autre poulie de renvoi supérieure. In this case, these sharpening devices are formed of three abrasive belts: a first band guided by a driving pulley at the bottom and a deflection pulley at the top, and two second strips, arranged longitudinally on either side of the first, both guided by said lower drive pulley, and by another upper idler pulley.
L'opération d'affûtage est réalisée en positionnant le taillant de l'outil dans le dièdre d'affûtage, contre la ligne de croisement des bandes, en particulier dans le plan médian de ce dièdre d'affûtage.  The grinding operation is carried out by positioning the cutting edge of the tool in the sharpening wedge, against the crossing line of the strips, in particular in the median plane of this sharpening wedge.
Dans le mode de réalisation de la figure 10 du document WO-2010007171 , un galet d'appui réglable en position dans un plan vertical est prévu au niveau du dièdre sous-jacent, avec sa surface active en contact avec les surfaces de dessous des bandes, pour permettre un réglage de l'angle du dièdre d'affûtage. Dans le document JP-2007 307658, deux tiges d'appui (repérées 58) sont prévues au niveau du dièdre sous-jacent, en appui contre les bandes sans fin, pour permettre de modifier l'angle du dièdre d'affûtage en fonction de l'appui appliqué sur le taillant de l'outil à affûter.  In the embodiment of FIG. 10 of document WO-2010007171, a support roller adjustable in position in a vertical plane is provided at the level of the underlying dihedron, with its active surface in contact with the bottom surfaces of the strips. , to allow adjustment of the angle of the sharpening wedge. In the document JP-2007 307658, two support rods (marked 58) are provided at the underlying dihedral, bearing against the endless belts, to allow the angle of the sharpening wedge to be changed as a function of the support applied to the cutting edge of the tool to be sharpened.
Mais de tels dispositifs ne permettent pas d'obtenir facilement le profil bombé de taillant recherché.  However, such devices do not make it possible to easily obtain the curved profile of the desired cut.
En effet, les dispositifs correspondants ne peuvent permettre l'obtention d'un tel profil de taillant bombé, que par la dextérité de l'opérateur, ou alors à partir de plusieurs étapes d'affûtage, en modifiant l'angle d'affûtage par des successions de réglages du galet d'appui.  In fact, the corresponding devices can only make it possible to obtain such a curved cutting profile profile, only by the dexterity of the operator, or else from several grinding steps, by modifying the sharpening angle by successions of adjustments of the support roller.
OBJET DE L'INVENTION OBJECT OF THE INVENTION
La présente invention propose une solution simple et originale pour perfectionner les dispositifs d'affûtage tels que décrits dans les documents JP- 2007 307658, WO-2010007171 ou US-2 222 361 , afin d'obtenir automatiquement un profil bombé de taillant, par de simples mouvements de la lame dans le plan médian du dièdre d'affûtage.  The present invention proposes a simple and original solution for improving the sharpening devices as described in the documents JP-2007 307658, WO-2010007171 or US-2 222 361, in order to automatically obtain a curved profile of cutting edge, by means of simple movements of the blade in the median plane of the sharpening dihedron.
Pour cela, et dans le cadre d'un dispositif d'affûtage tel que décrit ci- dessus, c'est-à-dire comprenant des bandes abrasives disposées en croix, la présente invention prévoit la présence de moyens d'appui contre l'une au moins des surfaces de dessous des bandes, au niveau du dièdre sous-jacent, qui sont adaptés pour faire varier de manière alternative l'angle du dièdre d'affûtage lors du mouvement desdites bandes.  For this, and in the context of a sharpening device as described above, that is to say comprising abrasive bands arranged in a cross, the present invention provides the presence of support means against the at least one of the bottom surfaces of the strips, at the underlying dihedral, which are adapted to alternately vary the angle of the sharpening wedge during the movement of said bands.
Une telle particularité permet une variation automatique des angles d'affûtage de la lame à affûter, pour obtenir un profil de tranchant en obus ou bombé, cela par de simples mouvements de la lame dans le plan ou sensiblement dans le plan médian du dièdre d'affûtage. Selon une caractéristique préférentielle, les moyens d'appui en question sont adaptés pour générer des mouvements alternatifs dont la fréquence, par seconde, est supérieure à 10, et de préférence supérieure à 20. Such a particularity allows an automatic variation of the sharpening angles of the blade to be sharpened, to obtain a shear profile in shells or bulging, that by simple movements of the blade in the plane or substantially in the median plane of the dihedron. sharpening. According to a preferred characteristic, the bearing means in question are adapted to generate reciprocating movements whose frequency, per second, is greater than 10, and preferably greater than 20.
Selon une forme de réalisation préférée, les moyens d'appui correspondants consistent en un galet d'appui monté en rotation autour d'un axe et dont la surface active coopérant avec les surfaces de dessous des bandes, comporte au moins une zone non centrée sur ledit axe de rotation.  According to a preferred embodiment, the corresponding support means consist of a support roller mounted to rotate about an axis and whose active surface cooperating with the surfaces of the bottom of the strips, comprises at least one non-centered zone on said axis of rotation.
Toujours selon une forme de réalisation préférée, ces moyens d'appui consistent en un galet d'appui dont la surface active est cylindrique, lequel galet d'appui est monté à rotation autour d'un axe décentré par rapport à l'axe de ladite surface active cylindrique.  Still according to a preferred embodiment, these support means consist of a bearing roller whose active surface is cylindrical, which support roller is rotatably mounted about an axis that is off-center with respect to the axis of said cylindrical active surface.
De préférence, l'axe de rotation du galet d'appui s'étend parallèlement ou sensiblement parallèlement à la ligne de croisement des bandes, et il se situe dans le plan ou sensiblement dans le plan médian du dièdre d'affûtage.  Preferably, the axis of rotation of the support roller extends parallel to or substantially parallel to the crossing line of the strips, and is located in the plane or substantially in the median plane of the sharpening wedge.
Selon une autre caractéristique, le dispositif d'affûtage comporte des moyens pour le réglage de la position du galet d'appui, dans le plan ou sensiblement dans le plan médian du dièdre d'affûtage.  According to another characteristic, the sharpening device comprises means for adjusting the position of the support roller, in the plane or substantially in the median plane of the sharpening wedge.
Ces moyens de réglage consistent alors avantageusement en une lumière allongée qui s'étend perpendiculairement à l'axe dudit galet d'appui, le long de laquelle ledit galet est mobile, et sur laquelle ledit galet peut se verrouiller en position, par tout moyen de verrouillage adapté.  These adjustment means then advantageously consist of an elongate slot which extends perpendicularly to the axis of said support roller, along which said roller is movable, and on which said roller can be locked in position, by any means of adapted lock.
Le galet d'appui est avantageusement monté fou autour de son axe de rotation, sa surface périphérique active étant en contact avec ledit dièdre sous- jacent formé par les faces de dessous desdites bandes, et ledit galet d'appui étant entraîné en mouvement de rotation par lesdites surfaces de dessous desdites bandes en mouvement.  The support roller is advantageously mounted idly about its axis of rotation, its active peripheral surface being in contact with said underlying dihedral formed by the undersides of said strips, and said support roller being driven in rotational movement. by said bottom surfaces of said moving bands.
Selon encore une autre caractéristique, les bandes abrasives s'enroulent sur une poulie motrice commune, aménagée du côté du dièdre sous-jacent, et sur des poulies de renvoi, aménagées du côté du dièdre d'affûtage.  According to yet another characteristic, the abrasive belts are wound on a common drive pulley, arranged on the side of the underlying dihedral, and on return pulleys, arranged on the side of the sharpening wedge.
Dans ce cadre, le dispositif d'affûtage comporte avantageusement, d'une part, une première bande abrasive guidée par une poulie motrice et par une première poulie de renvoi, et d'autre part, deux secondes bandes abrasives, disposées longitudinalement de part et d'autre de la première bande abrasive, et guidées par ladite poulie motrice et par une autre poulie de renvoi. In this context, the sharpening device advantageously comprises, on the one hand, a first abrasive belt guided by a driving pulley and by a first return pulley, and on the other hand, two second abrasive belts, arranged longitudinally on both sides. other of the first abrasive belt, and guided by said driving pulley and another pulley.
Les axes de rotation de la poulie motrice, des poulies de renvoi et du galet d'appui sont alors avantageusement parallèles entre eux, et le plan médian du dièdre d'affûtage s'étend verticalement ou sensiblement verticalement, les poulies de renvoi étant ménagées en partie supérieure, et la poulie motrice en partie inférieure. The axes of rotation of the drive pulley, the return pulleys and the support roller are then advantageously parallel to each other, and the median plane of the sharpening dihedron extends vertically or substantially vertically, the pulleys of referral being provided in the upper part, and the driving pulley in the lower part.
Selon encore une autre caractéristique, le dispositif d'affûtage comporte un châssis support sur lequel sont montés lesdites poulies de renvoi et lesdits moyens d'appui, ladite poulie motrice étant entraînée en rotation par une motorisation portée par un chariot qui est monté coulissant sur un système de glissières ménagé sur ledit châssis support, lesquelles glissières sont adaptées pour assurer une mise en tension automatique desdites bandes par le poids ou tout au moins une partie du poids de ladite motorisation.  According to yet another characteristic, the sharpening device comprises a support frame on which said return pulleys and said bearing means are mounted, said driving pulley being rotated by a motor driven by a carriage which is slidably mounted on a sliding system provided on said support frame, which slides are adapted to ensure automatic tensioning of said bands by the weight or at least a portion of the weight of said engine.
Cette particularité permet une mise en tension automatique des bandes, et autorise, le cas échéant, un changement rapide de ces bandes. This feature allows an automatic tensioning of the bands, and allows, if necessary, a rapid change of these bands.
Lesdites glissières s'étendent de préférence dans un plan perpendiculaire à l'axe de rotation de la poulie motrice et au plan médian du dièdre d'affûtage. Said slides preferably extend in a plane perpendicular to the axis of rotation of the driving pulley and the median plane of the sharpening wedge.
En outre, ledit châssis support comporte de préférence une plaque support à partir de l'une des faces de laquelle s'étendent en porte-à-faux lesdites poulies de renvoi et lesdits moyens d'appui, et contre l'autre face de laquelle sont ménagées lesdites glissières. In addition, said support frame preferably comprises a support plate from one of the faces of which extend cantilevered said return pulleys and said support means, and against the other face of which are provided said slides.
Selon encore une autre caractéristique, le plan dans lequel s'étendent les bandes abrasives est incliné vers l'avant par rapport à la verticale, selon un angle compris entre 25° et 45° , cela pour optimiser l'ergmomie de l'opération d'affûtage.  According to yet another characteristic, the plane in which the abrasive belts extend is inclined forwards with respect to the vertical, at an angle of between 25 ° and 45 °, in order to optimize the ergmomy of the operation of 'sharpening.
L'invention concerne encore un procédé d'affûtage pour une lame d'outil coupant type couteau ou similaire, au moyen d'au moins deux bandes abrasives mobiles munies chacune d'une surface de dessus active abrasive et d'une surface de dessous, lesquelles bandes sont décalées longitudinalement et disposées en croix pour former une ligne de croisement définissant, d'un côté, un dièdre d'affûtage formé par lesdites surfaces de dessus en mouvement desdites bandes, et de l'autre côté, un dièdre sous-jacent, formé par lesdites surfaces de dessous en mouvement desdites bandes, lequel procédé est caractérisé en ce qu'il consiste à faire varier de manière alternative l'angle dudit dièdre d'affûtage lors du mouvement desdites bandes.  The invention further relates to a sharpening method for a knife-like cutting tool blade or the like, by means of at least two moving abrasive belts each provided with an abrasive active top surface and a bottom surface, which strips are longitudinally offset and arranged in a cross to form a cross line defining, on one side, a sharpening wedge formed by said moving top surfaces of said strips, and on the other side, an underlying dihedral formed by said moving bottom surfaces of said strips, which method is characterized by alternately varying the angle of said sharpening wedge during movement of said strips.
De préférence ce procédé consiste à faire varier de manière alternative l'angle dudit dièdre d'affûtage selon des mouvements alternatifs dont la fréquence, par seconde, est supérieure à 10, et de préférence supérieure à 20. DESCRIPTION DÉTAILLÉE D'UN EXEMPLE DE RÉALISATION Preferably, this method consists in alternately varying the angle of said sharpening wedge in reciprocating movements whose frequency per second is greater than 10, and preferably greater than 20. DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
L'invention sera encore illustrée, sans être aucunement limitée, par la description suivante d'une forme de réalisation particulière, donnée uniquement à titre d'exemple et représentée sur les dessins annexés dans lesquels : - la figure 1 est une vue en perspective, légèrement par devant, d'un dispositif d'affûtage conforme à l'invention, une partie de son carter périphérique de protection ayant été enlevée ; The invention will be further illustrated, without being limited in any way, by the following description of a particular embodiment, given solely by way of example and shown in the accompanying drawings in which: - Figure 1 is a perspective view, slightly in front of a sharpening device according to the invention, a portion of its protective outer casing has been removed;
- la figure 2 est une vue en perspective par l'arrière du dispositif d'affûtage de la figure 1 ;  - Figure 2 is a perspective view from the rear of the sharpening device of Figure 1;
- la figure 3 montre le dispositif d'affûtage des figures 1 et 2 vu de face ;  - Figure 3 shows the sharpening device of Figures 1 and 2 seen from the front;
- la figure 4 est une vue de dessus du dispositif d'affûtage des figures 1 à 3 ;  - Figure 4 is a top view of the sharpening device of Figures 1 to 3;
- la figure 5 est une vue de côté du dispositif d'affûtage des figures 1 à 4 ;  - Figure 5 is a side view of the sharpening device of Figures 1 to 4;
- la figure 6 est une vue en perspective partielle par l'arrière du dispositif d'affûtage des figures 1 à 5, la quasi totalité de son châssis support ayant été enlevée ;  - Figure 6 is a partial perspective view from the rear of the sharpening device of Figures 1 to 5, almost all of its support frame has been removed;
- la figure 7 est une vue schématique en perspective des bandes abrasives du dispositif d'affûtage des figures 1 à 6, enroulées autour de leur poulie motrice et de leur poulie de renvoi, et associées au galet d'appui assurant la variation alternative de l'angle du dièdre d'affûtage ;  FIG. 7 is a diagrammatic perspective view of the abrasive belts of the sharpening device of FIGS. 1 to 6, wound around their drive pulley and their return pulley, and associated with the support roller ensuring the alternative variation of the angle of sharpening dihedral;
- la figure 8 est une vue de face de l'ensemble bandes/poulies/galet d'appui de la figure 5 ; FIG. 8 is a front view of the strip / pulley / support roller assembly of FIG. 5;
- la figure 9 est une vue de face isolée, du galet d'appui, illustrant sa surface cylindrique active décentrée.  - Figure 9 is an isolated front view of the support roller, illustrating its active cylindrical surface off-center.
Le dispositif d'affûtage 1 illustré sur les figures 1 à 9 comprend trois bandes abrasives 2, 3 et 4, en forme de bandes sans fin. Une première bande 2 s'enroule autour d'une poulie motrice 5 inférieure et autour d'une première poulie de renvoi 6 supérieure ; et deux secondes bandes 3 et 4 s'enroulent autour de ladite poulie motrice inférieure 5 et autour d'une seconde poulie de renvoi 7, cela parallèlement entre elles, et disposées longitudinalement de part et d'autre de ladite première bande 2.  The sharpening device 1 illustrated in Figures 1 to 9 comprises three abrasive strips 2, 3 and 4, in the form of endless bands. A first band 2 wraps around a lower drive pulley 5 and around a first top 6 pulley; and two second strips 3 and 4 are wound around said lower drive pulley 5 and around a second return pulley 7, parallel to each other, and arranged longitudinally on either side of said first strip 2.
Les bandes sans fin 2, 3 et 4 sont avantageusement identiques entre elles. Elles comportent une surface de dessus 2a, 3a, 4a active abrasive et une surface de dessous 2b, 3b, 4b avantageusement non abrasive.  The endless belts 2, 3 and 4 are advantageously identical to each other. They comprise an abrasive top surface 2a, 3a, 4a active and a bottom surface 2b, 3b, 4b advantageously non-abrasive.
Toute bande abrasive connue de l'homme du métier peut être utilisée pour la mise en œuvre du dispositif d'affûtage 1 .  Any abrasive belt known to those skilled in the art can be used for the implementation of the sharpening device 1.
L'axe 5' de la poulie motrice commune 5 s'étend parallèlement à l'axe 6', 7' des deux poulies de renvoi 6, 7.  The axis 5 'of the common drive pulley 5 extends parallel to the axis 6', 7 'of the two return pulleys 6, 7.
Les deux poulies de renvoi 6 et 7 sont disposées dans le même plan horizontal, leurs axes 6', 7' étant placés de manière symétrique par rapport au plan vertical par lequel passe l'axe 5' de la poulie motrice 5.  The two return pulleys 6 and 7 are arranged in the same horizontal plane, their axes 6 ', 7' being placed symmetrically with respect to the vertical plane through which the axis 5 'of the driving pulley 5 passes.
La bande abrasive 2, d'une part, et les bandes abrasives 3 et 4, d'autre part, sont ainsi agencées en croix, c'est-à-dire qu'elles se croisent pour former une ligne de croisement 8. Cette ligne de croisement 8 définit, d'un côté (en partie supérieure) un dièdre d'affûtage 9 supérieur formé par les surfaces de dessus abrasives 2a, 3a, 4a des bandes 2, 3, 4, et de l'autre côté (en partie inférieure) un dièdre 10 inférieur, dit « dièdre sous-jacent », formé par les surfaces de dessous 2b, 3b, 4b des bandes 2, 3 et 4. The abrasive belt 2, on the one hand, and the abrasive belts 3 and 4, on the other hand, are thus arranged in a cross, that is to say that they intersect to form a cross line 8. This crossing line 8 defines, on one side (in the upper part), an upper sharpening dihedron 9 formed by the abrasive top surfaces 2a, 3a, 4a of strips 2, 3, 4, and on the other side ( in the lower part) a lower dihedron 10, called "underlying dihedral", formed by the bottom surfaces 2b, 3b, 4b of the strips 2, 3 and 4.
Les poulies de renvoi supérieures 6 et 7 sont montées libres en rotation sur un châssis support 1 1 du dispositif d'affûtage 1 .  The upper return pulleys 6 and 7 are rotatably mounted on a support frame 1 1 of the sharpening device 1.
La poulie motrice 5 a ici un diamètre compris entre 3 et 4 fois le diamètre des poulies de renvoi 6 et 7 ; de préférence la poulie motrice 5 et les poulies de renvoi 6, 7 comportent des gorges périphériques adaptées au maintien en position des bandes 2, 3 et 4 qu'elles guident.  The driving pulley 5 here has a diameter of between 3 and 4 times the diameter of the return pulleys 6 and 7; preferably the driving pulley 5 and the return pulleys 6, 7 comprise peripheral grooves adapted to hold in position the strips 2, 3 and 4 that they guide.
D'autre part, la poulie motrice 5 est entraînée en rotation par une motorisation 12, de préférence une motorisation électrique. Le dispositif d'affûtage 1 comporte un interrupteur marche/arrêt 12a, pour la mise en marche ou l'arrêt de la motorisation 12, visible sur les figures 2, 4 et 5.  On the other hand, the driving pulley 5 is rotated by a motor 12, preferably an electric motor. The sharpening device 1 comprises an on / off switch 12a, for starting or stopping the operator 12, visible in Figures 2, 4 and 5.
Selon une caractéristique du dispositif d'affûtage 1 , cette motorisation 12 est portée par un chariot 13 qui est monté coulissant, sur un système de glissières 14 ménagé sur le châssis support 1 1 , dans un plan perpendiculaire ou sensiblement perpendiculaire à l'axe de la poulie motrice 5 (figure 6).  According to a characteristic of the sharpening device 1, this motor 12 is carried by a carriage 13 which is slidably mounted on a slide system 14 formed on the support frame 1 1, in a plane perpendicular to or substantially perpendicular to the axis of the driving pulley 5 (FIG. 6).
Ce chariot 13 monté à coulissement sur le système de glissières 14, et qui porte la motorisation 12 avec la poulie motrice 5, est supporté par les trois bandes abrasives 2, 3 et 4 (par l'intermédiaire de la poulie motrice 5), ce qui assure la mise en tension automatique de ces dernières, par le poids de l'ensemble chariot 13/motorisation 12/poulie 5, et ce qui permet aussi un remplacement rapide de ces bandes 2, 3, 4, par simple soulèvement de cet ensemble, en cas de besoin.  This carriage 13 slidably mounted on the slide system 14, and carrying the motor 12 with the driving pulley 5, is supported by the three abrasive belts 2, 3 and 4 (via the driving pulley 5), which which ensures the automatic tensioning of the latter, by the weight of the trolley assembly 13 / motorization 12 / pulley 5, and which also allows rapid replacement of these strips 2, 3, 4 by simply raising this assembly , if needed.
Au niveau du dièdre sous-jacent 10 du dispositif d'affûtage 1 , on remarque la présence de moyens d'appui 15 qui sont agencés, conformément à la présente invention, pour permettre une variation, de manière alternative, de l'angle du dièdre d'affûtage 9 lors du mouvement des bandes abrasives 2, 3, 4, entraînées par la poulie motrice 5.  At the level of the underlying dihedral 10 of the sharpening device 1, it is noted the presence of support means 15 which are arranged, according to the present invention, to allow a variation, alternatively, of the angle of the dihedron 9 during the movement of the abrasive belts 2, 3, 4, driven by the driving pulley 5.
Ces moyens d'appui consistent ici en un galet d'appui 15 monté fou en rotation autour d'un axe 15a solidaire du châssis 1 1 , et dont la surface active 15b (correspondant à sa surface périphérique) comporte au moins une zone décentrée par rapport audit axe 15a.  These support means here consist of a support roller 15 mounted idler in rotation about an axis 15a integral with the frame 1 1, and whose active surface 15b (corresponding to its peripheral surface) comprises at least one zone which is off-center by report to this axis 15a.
En l'occurrence, comme on peut le voir sur la figure 9, ce galet d'appui 15 comporte une surface active 15b qui est cylindrique, laquelle surface cylindrique 15b n'est pas centrée sur l'axe de rotation 15a. Pour visualiser ce décentrage, on a tracé sur la figure 9, en pointillés, un cercle virtuel 15ç centré sur l'axe 15a. In this case, as can be seen in FIG. 9, this support roller 15 comprises an active surface 15b which is cylindrical, which cylindrical surface 15b is not centered on the axis of rotation 15a. To visualize this off-centering, a virtual circle 15c centered on the axis 15a has been drawn in FIG. 9, in dashed lines.
La surface active cylindrique 15b du galet d'appui 15 est placée en contact avec le dièdre sous-jacent 10 précité, formé par les faces de dessous 2b, 3b, 4b des bandes 2, 3 et 4. Cette surface active est de préférence moletée pour optimiser l'entraînement en rotation du galet 15.  The cylindrical active surface 15b of the support roller 15 is placed in contact with the aforementioned underlying dihedron 10, formed by the bottom faces 2b, 3b, 4b of the strips 2, 3 and 4. This active surface is preferably knurled. to optimize the rotational drive of the roller 15.
On comprend que ce galet d'appui 15 est entraîné en mouvement de rotation autour de son axe 15a par le frottement, sur sa périphérie, de la surface de dessous 2b, 3b, 4b des différentes bandes 2, 3, 4, elles-mêmes entraînées par la poulie motorisée 5.  It is understood that this support roller 15 is rotated about its axis 15a by the friction, on its periphery, of the bottom surface 2b, 3b, 4b of the different strips 2, 3, 4, themselves. driven by the motorized pulley 5.
Comme illustré sur la figure 8, un entraînement de la poulie motorisée 5 dans le sens horaire, selon la flèche d'orientation 16, assure l'entraînement des bandes 2, d'une part, et 3, 4, d'autre part, selon les flèches d'orientation 17 et 18, respectivement.  As illustrated in FIG. 8, a drive of the motorized pulley 5 in the clockwise direction, according to the orientation arrow 16, ensures the driving of the strips 2, on the one hand, and 3, 4, on the other hand, according to the orientation arrows 17 and 18, respectively.
Les poulies de renvoi 6 et 7 tournent ici dans un sens horaire, entraînées par lesdites bandes 2, 3 et 4, et le galet d'appui 15 tourne également dans le sens horaire, tel qu'illustré par la flèche d'orientation 19. The return pulleys 6 and 7 rotate here in a clockwise direction, driven by said strips 2, 3 and 4, and the support roller 15 also rotates clockwise, as illustrated by the orientation arrow 19.
Le dièdre d'affûtage 9 comporte un plan médian P de part et d'autre duquel sont disposées les poulies de renvoi 6, 7 et dans lequel s'étend l'axe 15a du galet d'appui 15 et l'axe 5' de la poulie motrice 5. Ce dièdre d'affûtage 9 est situé au- dessus de la ligne de croisement 8, cette dernière étant située au-dessus du dièdre sous-jacent 10, du galet d'appui 15 et de la poulie motrice 5.  The sharpening wedge 9 comprises a median plane P on either side of which are disposed the return pulleys 6, 7 and in which the axis 15a of the support roller 15 and the axis 5 'of the driving pulley 5. This sharpening wedge 9 is located above the cross line 8, the latter being situated above the underlying dihedron 10, the support roller 15 and the driving pulley 5.
Le mouvement des bandes 2 et 3, 4 permet à un opérateur de réaliser l'affûtage d'une lame d'outil placée au niveau du dièdre d'affûtage 9, avec son taillant en appui contre la ligne de croisement 8 des bandes 2, 3 et 4.  The movement of the strips 2 and 3, 4 allows an operator to perform the sharpening of a tool blade placed at the sharpening wedge 9, with its cutting edge bearing against the crossing line 8 of the strips 2, 3 and 4.
Simultanément, on comprend que la rotation du galet 15 en appui contre lesdites faces de dessous 2b, 3b, 4b des bandes 2, 3, 4 modifie automatiquement, de manière alternative et en continu, l'angle du dièdre sous-jacent 10, et donc l'angle du dièdre d'affûtage 9, permettant l'obtention du taillant « bombé » recherché, cela en maintenant la lame à affûter dans le plan médian ou sensiblement dans le plan médian P du dièdre d'affûtage 9 (l'opérateur déplace alors simplement la lame en avant et/ou en arrière pour assurer l'affûtage sur toute sa longueur, en la maintenant sensiblement dans le plan médian du dièdre d'affûtage).  Simultaneously, it is understood that the rotation of the roller 15 bearing against said bottom faces 2b, 3b, 4b of the strips 2, 3, 4 automatically, alternately and continuously changes the angle of the underlying dihedron 10, and therefore the angle of sharpening dihedron 9, to obtain the desired "curved" cutter, while maintaining the blade to be sharpened in the median plane or substantially in the median plane P of the sharpening wedge 9 (the operator then simply move the blade forward and / or back to ensure sharpening along its length, keeping it substantially in the middle plane of the sharpening wedge).
Le taillant « bombé » est obtenu automatiquement du fait des variations alternées du positionnement du plan de la surface active 2a, 3a, 4a des bandes 2 et 3, 4, grâce à la rotation du galet à axe décentré 15. Le déplacement alternatif du plan des bandes 2, 3, 4 au niveau du dièdre d'affûtage 9, et donc la variation de l'angle du dièdre d'affûtage 9, peut être adapté selon le résultat que l'on souhaite obtenir, en particulier en modifiant les caractéristiques dimensionnelles des moyens d'appui 15 et/ou leur positionnement. The cutter "curved" is obtained automatically because of the alternating variations of the positioning of the plane of the active surface 2a, 3a, 4a of the strips 2 and 3, 4, thanks to the rotation of the off-axis roller 15. The alternative displacement of the plane of the strips 2, 3, 4 at the sharpening wedge 9, and therefore the variation of the angle of the sharpening wedge 9, can be adapted according to the result that is desired, in particularly by modifying the dimensional characteristics of the support means 15 and / or their positioning.
Par exemple, le décentrage de l'axe 15a du galet d'appui 15 par rapport à l'axe de sa surface active cylindrique 15b peut être de quelques dixièmes de millimètres, par exemple de l'ordre de 0,2 à 1 mm, pour un galet d'appui 15 ayant 42 mm de diamètre, une poulie motrice 5 ayant 100 mm de diamètre et des poulies de renvoi 6, 7 ayant 33 mm de diamètre.  For example, the decentering of the axis 15a of the support roller 15 relative to the axis of its cylindrical active surface 15b may be a few tenths of a millimeter, for example of the order of 0.2 to 1 mm, for a support roller 15 having a diameter of 42 mm, a drive pulley 5 having a diameter of 100 mm and return pulleys 6, 7 having a diameter of 33 mm.
La valeur de la variation angulaire alternative recherchée pour le dièdre d'affûtage 9 peut être déterminée par un réglage de la position du galet d'appui 15 dans le plan ou sensiblement dans le plan dudit dièdre d'affûtage 9.  The value of the alternative angular variation sought for the sharpening wedge 9 can be determined by adjusting the position of the support roller 15 in the plane or substantially in the plane of said sharpening wedge 9.
Les moyens de réglage correspondants (non présents dans le mode de réalisation illustré sur les figures) peuvent consister en une lumière allongée, ménagée perpendiculairement à l'axe du galet d'appui 15, dans le plan ou sensiblement dans le plan médian P du dièdre d'affûtage 9, le long de laquelle ledit galet 15 est monté mobile, et sur laquelle ledit galet 15 peut venir se verrouiller en position, par tout moyen de verrouillage adapté (par exemple par un système de blocage du type vis-écrou).  The corresponding adjustment means (not present in the embodiment illustrated in the figures) may consist of an elongated slot, formed perpendicularly to the axis of the support roller 15, in the plane or substantially in the median plane P of the dihedron 9, along which said roller 15 is movably mounted, and on which said roller 15 can be locked in position by any suitable locking means (for example by a locking system of the screw-nut type).
Les moyens d'appui 15 en association avec les caractéristiques d'entraînement des bandes 2, 3, 4 (en particulier leur vitesse linéaire) sont avantageusement adaptés pour générer des mouvements alternatifs dont la fréquence est supérieure à 10 par seconde, et de préférence supérieure à 20 par seconde, et encore de préférence comprise entre 30 et 70 par seconde.  The bearing means 15 in combination with the driving characteristics of the strips 2, 3, 4 (in particular their linear speed) are advantageously adapted to generate reciprocating movements whose frequency is greater than 10 per second, and preferably greater at 20 per second, and more preferably between 30 and 70 per second.
Le châssis support 1 1 du dispositif d'affûtage 1 comporte en particulier une base inférieure 20 destinée à reposer sur tout support approprié, par exemple une table ou un plateau de réception, à partir de laquelle s'étendent vers le haut deux côtés latéraux 21 reliés par une plaque entretoise 22.  The supporting frame 1 1 of the sharpening device 1 comprises in particular a lower base 20 intended to rest on any suitable support, for example a table or a receiving tray, from which two side sides 21 extend upwards. connected by a spacer plate 22.
Les deux côtés latéraux 21 forment une partie du carter périphérique du dispositif d'affûtage 1 . La plaque entretoise 22 s'étend à l'intérieur du dispositif. Elle sert notamment de support aux axes des deux poulies de renvoi 6 et 7, et à l'axe du galet d'appui 15, qui s'étendent en porte-à-faux à partir de l'une de ses faces ; sa face opposée sert de support aux glissières 14 de guidage du chariot 13 (figure 2). The two lateral sides 21 form part of the peripheral casing of the sharpening device 1. The spacer plate 22 extends inside the device. It serves in particular to support the axes of the two return pulleys 6 and 7, and the axis of the support roller 15, which extend cantilever from one of its faces; its opposite face serves as support slides 14 guiding the carriage 13 (Figure 2).
Cette plaque support 22, non représentée sur la figure 6, peut comporter la lumière allongée précitée pour le réglage du positionnement du galet d'appui 15, l'axe de ce dernier étant alors équipé du moyen de verrouillage amovible associé (par exemple en forme de système vis-écrou). Cette plaque support 22 comporte encore une ouverture supérieure médiane 23 permettant de ne pas gêner les mouvements de la lame d'outil que l'on souhaite affûter, lors de son opération d'affûtage, ainsi qu'une ouverture inférieure 24 pour le mouvement libre en translation de l'ensemble chariot 13/motorisation 12/poulie 5, le long du système de glissières 14 précité. This support plate 22, not shown in FIG. 6, may comprise the aforementioned elongate light for adjusting the positioning of the support roller 15, the axis of the latter being then equipped with the associated removable locking means (for example in the form of screw-nut system). This support plate 22 also has a median upper opening 23 which does not interfere with the movements of the tool blade that is to be sharpened during its grinding operation, as well as a lower opening 24 for free movement. in translation of the carriage assembly 13 / motorization 12 / pulley 5, along the aforementioned slide system 14.
La plaque support 22 s'étend avantageusement dans un plan incliné vers l'avant lorsque le dispositif d'affûtage 1 est en position sur sa table ou son plateau de réception, pour que les différentes bandes 2, 3, 4 s'étendent dans un plan incliné parallèle, cela afin d'améliorer l'ergonomie des opérations d'affûtage. L'angle d'inclinaison correspondant a^ par rapport à la verticale, visible sur la figure 5, peut être de l'ordre de 25° à 45° .  The support plate 22 advantageously extends in a plane inclined forwards when the sharpening device 1 is in position on its table or receiving plate, so that the different strips 2, 3, 4 extend in a direction. parallel inclined plane, in order to improve the ergonomics of sharpening operations. The angle of inclination corresponding to 1 with respect to the vertical, visible in FIG. 5, can be of the order of 25 ° to 45 °.
Le dispositif d'affûtage 1 comporte avantageusement un carter périphérique adapté pour protéger ses éléments fonctionnels constitutifs, ainsi que l'opérateur chargé d'affûter une lame d'outil.  The sharpening device 1 advantageously comprises a peripheral housing adapted to protect its constituent functional elements, as well as the operator responsible for sharpening a tool blade.
Ce carter périphérique comprend notamment une partie frontale pour masquer la poulie motrice 5 et le galet d'appui 15, ainsi qu'une partie arrière pour masquer la motorisation 12, qui n'apparaissent pas sur les figures 1 à 6 pour faciliter la compréhension de la structure du dispositif d'affûtage 1 .  This peripheral casing includes in particular a front part to hide the driving pulley 5 and the support roller 15, as well as a rear part to hide the motorization 12, which do not appear in FIGS. 1 to 6 to facilitate the understanding of the structure of the sharpening device 1.
Ces parties frontale et arrière de carter sont de préférence prévues amovibles.  These front and rear housing parts are preferably provided removable.
Au niveau d'une ouverture 25 ménagée sur le dessus et l'avant du carter du dispositif 1 pour réaliser les opérations d'affûtage (c'est-à-dire au dessus et devant le dièdre d'affûtage 9), on remarque la présence d'un dispositif guide-lame 26 en forme générale de Vé dont la pointe est ouverte vers le bas. En outre, en arrière de ce dispositif guide-lame 26, une structure de butée 27, à section en Vé, assure la protection de la mécanique interne contre les agressions de poussières liées à l'affûtage, et contre les éventuels coups de lame. Cette structure de butée 27 est de préférence réalisée en un matériau non agressif pour la lame, par exemple en polypropylène ; elle peut être solidaire de la partie arrière du carter de protection. Des disques fixes 28 sont positionnés à l'extrémité en porte-à-faux des axes des poulies de renvoi 6 et 7, pour protéger ces poulies 6 et 7 contre les agressions des lames en cours d'affûtage.  At an opening 25 formed on the top and the front of the casing of the device 1 to carry out the grinding operations (that is to say above and in front of the sharpening wedge 9), the presence of a guide-blade device 26 in the general shape of Vé whose tip is open downwards. In addition, behind this blade guide device 26, an abutment structure 27, section Vee, provides protection of the internal mechanics against dust attacks related to sharpening, and against possible blade blows. This abutment structure 27 is preferably made of a non-aggressive material for the blade, for example polypropylene; it can be secured to the rear portion of the protective housing. Fixed disks 28 are positioned at the cantilevered end of the axes of the return pulleys 6 and 7, to protect these pulleys 6 and 7 against the aggressions of the blades being sharpened.
De manière alternative, les moyens d'appui 15 peuvent se présenter sous une forme autre qu'un galet rotatif avec surface active décentrée.  Alternatively, the support means 15 may be in a form other than a rotary roller with decentred active surface.
Par exemple, ces moyens d'appui 15 peuvent être constitués d'un galet à section allongée, par exemple ovale, ou encore d'une structure mobile en translation horizontale, selon des mouvements alternatifs, et dont les extrémités viennent prendre appui contre les surfaces de dessous 2b ; 3b, 4b des bandes 2 ; 3, 4 en vue de faire varier alternativement l'angle du dièdre d'affûtage 9. For example, these support means 15 may consist of an elongate section roller, for example oval, or alternatively of a structure that is movable in horizontal translation, in reciprocating movements, and whose ends come to bear against the surfaces below 2b; 3b, 4b strips 2; 3, 4 for alternately varying the angle of the sharpening wedge 9.
Eventuellement, les moyens d'appui 15 peuvent aussi être adaptés pour entrer en contact avec une seule desdites bandes 2, 3, 4, ou deux d'entre elles.  Optionally, the support means 15 may also be adapted to come into contact with only one of said strips 2, 3, 4, or two of them.

Claims

- REVENDICATIONS - - CLAIMS -
1 . - Dispositif d'affûtage (1 ) pour une lame d'outil coupant type couteau ou similaire, lequel dispositif d'affûtage (1 ) comprend au moins deux bandes (2 ; 3, 4) abrasives mobiles munies chacune d'une surface de dessus (2a, 3a, 4a) active abrasive et d'une surface de dessous (2b, 3b, 4b), lesquelles bandes (2 ; 3, 4) sont décalées longitudinalement et disposées en croix pour former une ligne de croisement (8) définissant, d'un côté, un dièdre d'affûtage (9) formé par lesdites surfaces de dessus (2a, 3a, 4a) en mouvement desdites bandes (2, 3, 4), et de l'autre côté, un dièdre sous-jacent (10), formé par lesdites surfaces de dessous (2b, 3b, 4b) en mouvement desdites bandes (2, 3, 4), 1. - Sharpening device (1) for a knife-like cutting tool blade or the like, which grinding device (1) comprises at least two mobile abrasive strips (2; 3, 4) each provided with a top surface (2a, 3a, 4a) abrasive active and a bottom surface (2b, 3b, 4b), which bands (2; 3, 4) are longitudinally offset and arranged in a cross to form a cross line (8) defining on one side, a sharpening wedge (9) formed by said moving top surfaces (2a, 3a, 4a) of said strips (2, 3, 4), and on the other side, a dihedron jacent (10), formed by said moving bottom surfaces (2b, 3b, 4b) of said strips (2, 3, 4),
caractérisé en ce qu'il comporte des moyens (15) d'appui contre l'une au moins desdites surfaces de dessous (2b, 3b, 4b) desdites bandes (2, 3, 4), au niveau dudit dièdre sous-jacent (10), qui sont adaptés pour faire varier de manière alternative l'angle dudit dièdre d'affûtage lors du mouvement desdites bandes (2, 3, 4). characterized in that it comprises means (15) for bearing against at least one of said bottom surfaces (2b, 3b, 4b) of said strips (2, 3, 4), at said underlying dihedral ( 10), which are adapted to alternately vary the angle of said sharpening wedge during the movement of said strips (2, 3, 4).
2. - Dispositif d'affûtage selon la revendication 1 , caractérisé en ce que lesdits moyens d'appui (15) sont adaptés pour générer des mouvements alternatifs dont la fréquence, par seconde, est supérieure à 10, et de préférence supérieure à 20.  2. - Sharpening device according to claim 1, characterized in that said support means (15) are adapted to generate reciprocating movements whose frequency per second is greater than 10, and preferably greater than 20.
3.- Dispositif d'affûtage (1 ) selon l'une quelconque des revendications 1 ou 3.- sharpening device (1) according to any one of claims 1 or
2, caractérisé en ce que lesdits moyens d'appui consistent en un galet d'appui (15) monté en rotation autour d'un axe (15a) et dont la surface active (15b) coopérant avec la surface de dessous (2b, 3b, 4b) de l'une au moins desdites bandes (2, 3, 4), comporte au moins une zone non centrée sur ledit axe de rotation (15b). 2, characterized in that said support means consist of a support roller (15) rotatably mounted about an axis (15a) and whose active surface (15b) cooperating with the bottom surface (2b, 3b , 4b) of at least one of said strips (2, 3, 4) comprises at least one non-centered area on said axis of rotation (15b).
4.- Dispositif d'affûtage selon la revendication 3, caractérisé en ce que lesdits moyens d'appui (15) consistent en un galet d'appui dont la surface active (15b) est cylindrique, lequel galet d'appui (15) est monté à rotation autour d'un axe (15a) décentré par rapport à l'axe de ladite surface active cylindrique (15b).  4. A sharpening device according to claim 3, characterized in that said support means (15) consist of a bearing roller whose active surface (15b) is cylindrical, which support roller (15) is rotatably mounted about an axis (15a) off-center with respect to the axis of said cylindrical active surface (15b).
5.- Dispositif d'affûtage selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que l'axe de rotation (15a) dudit galet d'appui (15) s'étend parallèlement ou sensiblement parallèlement à ladite ligne de croisement (8) desdites bandes (2, 3, 4), et se situe dans le plan ou sensiblement dans le plan médian dudit dièdre d'affûtage (9).  5. A sharpening device according to any one of claims 3 or 4, characterized in that the axis of rotation (15a) of said support roller (15) extends parallel or substantially parallel to said crossing line (8) of said strips (2, 3, 4), and is in the plane or substantially in the median plane of said sharpening wedge (9).
6.- Dispositif d'affûtage selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'il comporte des moyens pour le réglage de la position dudit galet d'appui (15), dans le plan ou sensiblement dans le plan médian du dièdre d'affûtage (9). 6. A sharpening device according to any one of claims 3 to 5, characterized in that it comprises means for adjusting the position of said support roller (15) in the plane or substantially in the plane median of the sharpening dihedron (9).
7. - Dispositif d'affûtage selon la revendication 6, caractérisé en ce que lesdits moyens de réglage consistent en une lumière allongée qui s'étend perpendiculairement à l'axe dudit galet d'appui (15), le long de laquelle ledit galet (15) est mobile, et sur laquelle ledit galet (15) peut se verrouiller en position, par tout moyen de verrouillage adapté. 7. - A sharpening device according to claim 6, characterized in that said adjusting means consist of an elongate slot which extends perpendicularly to the axis of said support roller (15), along which said roller ( 15) is movable, and on which said roller (15) can lock in position, by any suitable locking means.
8. - Dispositif d'affûtage selon l'une quelconque des revendications 3 à 5, caractérisé en ce que ledit galet d'appui (15) est monté fou autour de son axe de rotation (15a), sa surface périphérique active (15b) étant en contact avec ledit dièdre sous-jacent (10) formé par les faces de dessous (2b, 3b, 4b) desdites bandes (2, 3, 4), et ledit galet d'appui (15) étant entraîné en mouvement de rotation par lesdites surfaces de dessous (2b, 3b, 4b) desdites bandes en mouvement (2, 3, 4).  8. - Sharpening device according to any one of claims 3 to 5, characterized in that said support roller (15) is mounted idler about its axis of rotation (15a), its active peripheral surface (15b) being in contact with said underlying dihedral (10) formed by the bottom faces (2b, 3b, 4b) of said strips (2, 3, 4), and said support roller (15) being rotated by said bottom surfaces (2b, 3b, 4b) of said moving strips (2, 3, 4).
9. - Dispositif d'affûtage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que lesdites bandes abrasives (2, 3, 4) s'enroulent sur une poulie motrice (5) commune, aménagée du côté du dièdre sous-jacent (10), et sur des poulies de renvoi (6, 7), aménagées du côté du dièdre d'affûtage (9).  9. - sharpening device according to any one of claims 1 to 8, characterized in that said abrasive strips (2, 3, 4) are wound on a drive pulley (5) common, arranged on the side of the dihedron under -jacent (10), and on pulleys (6, 7), arranged on the side of sharpening dihedron (9).
10. - Dispositif d'affûtage selon la revendication 9, caractérisé en ce qu'il comporte, d'une part, une première bande abrasive (2) guidée par une poulie motrice (5) et par une première poulie de renvoi (6), et d'autre part, deux secondes bandes abrasives (3, 4), disposées longitudinalement de part et d'autre de la première bande abrasive (2), et guidées par ladite poulie motrice (5) et par une autre poulie de renvoi (7).  10. - Grinding device according to claim 9, characterized in that it comprises, firstly, a first abrasive belt (2) guided by a driving pulley (5) and a first pulley (6) and secondly, two second abrasive belts (3, 4), arranged longitudinally on either side of the first abrasive belt (2), and guided by said drive pulley (5) and by another deflection pulley (7).
1 1 . - Dispositif d'affûtage selon l'une quelconque des revendications 9 ou 10, caractérisé en ce que les axes de rotation (5', 6', 7', 15a) de la poulie motrice (5), des poulies de renvoi (6, 7) et du galet d'appui (15) sont parallèles entre eux, et en ce que le plan médian (P) du dièdre d'affûtage (9) s'étend verticalement ou sensiblement verticalement, lesdites poulies de renvoi (6, 7) étant ménagées en partie supérieure, et ladite poulie motrice (5) en partie inférieure.  1 1. - Sharpening device according to any one of claims 9 or 10, characterized in that the axes of rotation (5 ', 6', 7 ', 15a) of the driving pulley (5), pulleys (6 7) and the supporting roller (15) are parallel to one another, and in that the median plane (P) of the sharpening wedge (9) extends vertically or substantially vertically, said return pulleys (6, 7) being formed in the upper part, and said driving pulley (5) in the lower part.
12. - Dispositif d'affûtage selon l'une quelconque des revendications 9 à 1 1 , caractérisé en ce qu'il comporte un châssis support (1 1 ) sur lequel sont montés lesdites poulies de renvoi (6, 7) et lesdits moyens d'appui (15), ladite poulie motrice (5) étant entraînée en rotation par une motorisation (12) portée par un chariot (13) qui est monté coulissant sur un système de glissières (14) ménagé sur ledit châssis support (1 1 ), lesquelles glissières (14) sont adaptées pour assurer une mise en tension automatique desdites bandes (2, 3, 4) par le poids ou tout au moins une partie du poids, de ladite motorisation (12). 12. - sharpening device according to any one of claims 9 to 1 1, characterized in that it comprises a support frame (1 1) on which are mounted said return pulleys (6, 7) and said means of support (15), said driving pulley (5) being rotated by an actuator (12) carried by a carriage (13) which is slidably mounted on a slide system (14) provided on said support frame (1 1) , which slides (14) are adapted to ensure automatic tensioning of said strips (2, 3, 4) by the weight or at least a portion of the weight of said motor (12).
13. - Dispositif d'affûtage selon la revendication 12, caractérisé en ce que lesdites glissières (14) s'étendent dans un plan perpendiculaire à l'axe de rotation (5') de la poulie motrice (5) et au plan médian (P) du dièdre d'affûtage (9). 13. - Sharpening device according to claim 12, characterized in that said slides (14) extend in a plane perpendicular to the axis of rotation (5 ') of the drive pulley (5) and the median plane ( P) of the sharpening wedge (9).
14. - Dispositif selon l'une quelconque des revendications 12 ou 13, caractérisé en ce que ledit châssis support (1 1 ) comporte une plaque support (22) à partir de l'une des faces de laquelle s'étendent en porte-à-faux lesdites poulies de renvoi (6, 7) et lesdits moyens d'appui (15), et contre l'autre face de laquelle sont ménagées lesdites glissières (14).  14. - Device according to any one of claims 12 or 13, characterized in that said support frame (1 1) comprises a support plate (22) from one of the faces of which extend door-to- -faux said return pulleys (6, 7) and said support means (15), and against the other side of which are provided said slides (14).
15. - Dispositif d'affûtage selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le plan dans lequel s'étendent les bandes abrasives (2, 3, 4) est incliné vers l'avant par rapport à la verticale, selon un angle (a) compris entre 25° et 45° .  15. - Sharpening device according to any one of claims 1 to 14, characterized in that the plane in which the abrasive strips (2, 3, 4) extend is inclined forwardly with respect to the vertical at an angle (a) between 25 ° and 45 °.
16 - Procédé d'affûtage pour une lame d'outil coupant type couteau ou similaire, au moyen d'au moins deux bandes (2 , 3, 4) abrasives mobiles munies chacune d'une surface de dessus (2a, 3a, 4a) active abrasive et d'une surface de dessous (2b, 3b, 4b), lesquelles bandes (2 , 3, 4) sont décalées longitudinalement et disposées en croix pour former une ligne de croisement (8) définissant, d'un côté, un dièdre d'affûtage (9) formé par lesdites surfaces de dessus (2a, 3a, 4a) en mouvement desdites bandes (2, 3, 4), et de l'autre côté, un dièdre sous-jacent (10), formé par lesdites surfaces de dessous (2b, 3b, 4b) en mouvement desdites bandes (2, 3, 4),  16 - Sharpening method for a knife-like cutting tool blade or the like, by means of at least two mobile abrasive strips (2, 3, 4) each provided with a top surface (2a, 3a, 4a) abrasive active material and a bottom surface (2b, 3b, 4b), which strips (2, 3, 4) are longitudinally offset and arranged in a cross-section to form a cross line (8) defining, on one side, a sharpening dihedron (9) formed by said moving top surfaces (2a, 3a, 4a) of said strips (2, 3, 4), and on the other side an underlying dihedral (10) formed by said moving bottom surfaces (2b, 3b, 4b) of said strips (2, 3, 4),
caractérisé en ce qu'il consiste à faire varier de manière alternative l'angle dudit dièdre d'affûtage (9) lors du mouvement desdites bandes (2, 3, 4). characterized in that it alternatively varies the angle of said sharpening wedge (9) during the movement of said strips (2, 3, 4).
17 - Procédé d'affûtage selon la revendication 16, caractérisé en ce qu'il consiste à faire varier de manière alternative l'angle dudit dièdre d'affûtage (9) selon des mouvements alternatifs dont la fréquence, par seconde, est supérieure à 10, et de préférence supérieure à 20. 17 - sharpening method according to claim 16, characterized in that it consists in alternately varying the angle of said sharpening dihedron (9) in reciprocating movements whose frequency per second is greater than 10 , and preferably greater than 20.
PCT/FR2015/051266 2014-05-15 2015-05-13 Sharpening device having abrasive belts arranged crosswise WO2015173518A1 (en)

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FR1454317A FR3020976B1 (en) 2014-05-15 2014-05-15 SHARPENING DEVICE WITH ABRASIVE BANDS DISPOSED IN CROSS
FR1454317 2014-05-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107052915A (en) * 2017-01-23 2017-08-18 刘福民 A kind of abrasive band electric knife sharpener and its method to set up
CN112621498A (en) * 2020-12-25 2021-04-09 杭州爱科科技股份有限公司 Abrasive belt knife sharpening method and knife sharpening device thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222361A (en) 1939-11-01 1940-11-19 Joseph E Burns Sharpening device for edged implements
US2341068A (en) * 1941-07-14 1944-02-08 John G Zummach Grinder
JP2007307658A (en) 2006-05-18 2007-11-29 Yoshida Kinzoku Kogyo Kk Cutting tool grinding device
WO2010007171A1 (en) 2008-07-17 2010-01-21 Visonn Gmbh & Co. Kg Sharpening machine for cutting blades

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222361A (en) 1939-11-01 1940-11-19 Joseph E Burns Sharpening device for edged implements
US2341068A (en) * 1941-07-14 1944-02-08 John G Zummach Grinder
JP2007307658A (en) 2006-05-18 2007-11-29 Yoshida Kinzoku Kogyo Kk Cutting tool grinding device
WO2010007171A1 (en) 2008-07-17 2010-01-21 Visonn Gmbh & Co. Kg Sharpening machine for cutting blades

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107052915A (en) * 2017-01-23 2017-08-18 刘福民 A kind of abrasive band electric knife sharpener and its method to set up
CN112621498A (en) * 2020-12-25 2021-04-09 杭州爱科科技股份有限公司 Abrasive belt knife sharpening method and knife sharpening device thereof

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FR3020976B1 (en) 2016-05-13
EP3142830A1 (en) 2017-03-22
FR3020976A1 (en) 2015-11-20
EP3142830C0 (en) 2023-12-06
EP3142830B1 (en) 2023-12-06

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