EP1722927A1 - Dispositif d'affilage de lame d'outil coupant a main - Google Patents
Dispositif d'affilage de lame d'outil coupant a mainInfo
- Publication number
- EP1722927A1 EP1722927A1 EP05732684A EP05732684A EP1722927A1 EP 1722927 A1 EP1722927 A1 EP 1722927A1 EP 05732684 A EP05732684 A EP 05732684A EP 05732684 A EP05732684 A EP 05732684A EP 1722927 A1 EP1722927 A1 EP 1722927A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- levers
- support
- sharpening
- blade
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
- B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
- B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
Definitions
- the invention relates to a device for sharpening a blade of a hand cutting tool, in particular a knife, comprising a support provided with a cutout, sharpening members being placed facing and staggered at the in the vicinity of the cut, rotatably mounted around axes fixed to the support and fitted with position return means so as to define a variable sharpening zone according to the position of the blade of a tool between the sharpening members.
- a device for sharpening a blade of a hand cutting tool in particular a knife
- Such devices are used in the food industry and, in particular, in the meat industry in order to quickly and simply reform the wire of the knives used. Given the production lines and the aggressive environment encountered in these industries, due for example to ambient humidity and grease, it is necessary to have sharpening devices that are easy to use, to clean, to maintain and robust.
- US-B-5 655 959 discloses a sharpening device comprising a plate supporting two axes on which are mounted free in rotation of the curved rods. These rods are arranged on the sides of a cut, in this case two on the same side and the third on the other side, so as to cross. They are equipped at one end with an insert forming a counterweight. Cams located under the rods at the counterweight allow the return force to be adjusted. It should be noted that one of the counterweights has a different mass than those of the other two counterweights. In this case, the rod carrying this counterweight serves as a guide for the blade. Rods are arranged so as to guide and form end stops for the rods. The area between the intersecting stems forms a sharpening region.
- the knife is guided in this region by making a slot in the support.
- the sharpening is only carried out by two rods, those having identical counterweights.
- adjusting the cams identically is not easy, which often results in distortion of the sharpening zone, the force exerted by each rod not being identical.
- guiding the blade during its introduction into the notch of the support is not easy, the blade frequently coming into contact with the support which increases the blunting of this blade and causes degradation of the support.
- this device is relatively fragile. It is these drawbacks that the invention intends to remedy more particularly by proposing a sharpening device which is particularly simple to implement and which has an effective sharpening zone.
- the subject of the invention is a sharpening device of the aforementioned type, characterized in that the sharpening members comprise at least three identical levers, each lever being bent and provided with two arms, one of which is generally curved and fitted with an end with a substantially rectilinear edge while the other arm constitutes a means for returning the lever to the gravity position, the lever being pivotally mounted, at a junction zone between the arms, around a geometric axis generally perpendicular to the longitudinal direction of the cut.
- a sharpening device is produced in which the sharpening zone is effective all along the path of the blade in cutting the support, the assembly being of simple and robust construction, the introduction of the blade being facilitated by the complementary shapes of the cut and part of the levers.
- the sharpening device incorporates one or more of the following characteristics: -
- Each lever comprises an arm, one edge of which is generally of hemispherical section and is adapted to be in contact with a blade d 'a tool.
- the edge of the arm of at least one lever is polished at least in the curved part of the arm and finely striated, like a sharpening steel, at least at the end of the same arm.
- the levers are capable of being locked in a so-called rest position, where the spacing between the ends is maximum, by two stops fixed on the support and made of a shock absorbing material.
- the support is equipped with a third stop located generally midway between the two stops in damping material and adapted to lock the levers in a position where the spacing between the ends is minimal.
- the third stop has a length and a shape adapted to maintain at least one of the levers in a so-called cleaning position where the latter is not free to rotate.
- the third stop is equipped with a protective means, in particular a sleeve made of flexible material.
- Each arm forming a return means is equipped with a means for fixing an additional return means by gravity, in particular a weight.
- the levers are kept apart from the support and / or from each other by removable washers.
- FIG. 1 is a front view of a sharpening device according to a first embodiment of the invention, in the rest position
- - Figures 2 4 are perspective views of the device shown in FIG. 1 in different positions of use, the blade of a knife being represented respectively at the start of sharpening, during sharpening and at the end of sharpening
- - FIG. 5 is a front view of the device represented in FIG.
- FIG. 1 is a front view of a sharpening device according to a second embodiment.
- the sharpening device 1 shown in FIG. 1 comprises a support 2 generally in the shape of a T, plan and of small thickness.
- This support 2 is made of a rigid material, insensitive to the environment in which it is placed, in particular insensitive to chemical attack and corrosion.
- it is machined from a stainless steel plate.
- the leg 3 of the T is oriented upwards and has a cutout 4 extending from its free end to approximately one third of its length.
- This cut 4 generally has a V shape and it extends, by a rectilinear slot 5, to the intersection with the transverse bar 6 of the T.
- This slot 5 is oriented in a direction generally parallel to a longitudinal axis AA ' of leg 3 of T.
- This leg 3 has a part 30, located on one side of the slot 5 and of the cutout 4.
- this gripping member 32 comprises a hooking member formed by an orifice 33, allowing the device to be suspended, in particular during cleaning operations.
- the gripping member is arranged on the end of the part 31 of the leg 3 of the support.
- This stop or rod 7 extends from the bar 6 and is oriented in a main direction D 7 generally perpendicular to the axis AA ′ and to the plane of the support 2.
- This stop 7 is framed by two orifices 8 and 8 'formed in the support and allowing the fixing of the latter, for example on a work station, by means of fixing members not shown and known per se, in particular pins, rivets or screws .
- the support 2 is also equipped with two other stops 9 made of a material insensitive to physical and chemical attack prevailing on the work station and absorbing shocks.
- these stops 9 are made of rubber, elastomer or polymer.
- These two identical stops 9, of oval cross section and of dimensions substantially greater than that of the stop 7, are positioned at the ends 60 of the transverse bar 6 of the support 2.
- the stops 9 are arranged on either side and at equal distance of the stop 7.
- the stops 9 extend from the bar 6 and are oriented in a main direction Dg generally parallel to the direction D. Three stops 7 and 9 are thus obtained arranged in a triangle.
- two parallel and fixed axes 10 are arranged on each side of the latter.
- axes 10 extend from the parts 30, 31 of the leg 3 and are oriented along a geometric axis D 10 generally perpendicular to the axis AA 'and to the plane of the support 2. On these axes 10 are mounted free in rotation sharpening levers 11.
- levers 11, three in number, are identical and arranged on each side of the cutout 4 and of the slot 5, two on the side of the part 31, one on the side of the part 30. They are kept apart from the support 2 and separated from each other by removable rings or washers 12. Their translation locking on each axis 10 is provided, in a removable manner, for example, by a screw / nut assembly 120. Thus, the spacing between a lever can easily be modified 11 and the support 2 and / or between each lever 11 by adding or removing one or more washers 12. Similarly, the insertion of additional levers 11 or the change of a defective lever 11 is carried out easily.
- the levers 11 are in the form of a flat piece, one piece, of small thickness, made of a rigid material, of a hardness greater than the hardness of the knife blades to be sharpened and insensitive to physical and chemical attack.
- the levers 11 are made of martensitic stainless steel with a minimum hardness of approximately 57 HRC.
- the levers 11 are bent and formed by two arms 13, 16.
- the arm 13 is curved and configured so as to have a curvature adapted to the shape of the cutout 4.
- the arm 13 ends in an end 14, representing approximately 20 to 30% of the total length of the arm 13 and which is not curved but with a straight edge.
- Each arm 13 has an edge F with a generally hemispherical section. The rounded edge F is located on one side of the cutout 4 and of the slot 5, facing an edge F of another arm 13 located on the other side of the cutout 4 and of the
- This same zone 15 is extended by an arm 16, integrally formed with zone 15 and the arm 13.
- This arm 16 extends outwards relative to the curvature of the arm 13.
- the arm 16 is of shape generally trapezoidal.
- each lever 11 generally has a hatchet shape, the handle of which is curved.
- the arm 16 is of sufficient dimensions to form, when the lever 11 is mounted on its axis of rotation 10, a counterweight and thus bring the curved arm 13 upwards by pivoting, in the direction of the arrows Pi in FIG. 1, in the absence of effort exerted by the user.
- the latter is provided with an orifice 17 allowing any additional weight to be attached.
- the levers 11 are arranged on the support 2, on either side of the cutout 4, so that their curved arms 13 are opposite one another.
- two levers 11 are located on the same side of the cutout 4 and the slot 5 in superposition, but without mutual support thanks to the washers 12 which keep them spaced apart. In this case, they are located on part 31 of leg 3.
- the third lever 11 is located on the other side, on part 30 of leg 3.
- This third lever has its curved arm 13 and its straight end 14 oriented towards the other two levers 11 and housed in the space between these two levers 11.
- the curved arms 13 of the levers 11 are staggered and intersect.
- the gap between the different levers 11 is sufficient to prevent the arms 13, 16 from touching each other during their respective movements.
- the levers 11 In the rest position, shown in FIG. 1, the levers 11 generally form an X, the upper branches of which partially mask the edges of the cutout 4 of the support. The levers are held in this rest position by pressing the end 160 of the arms or counterweight 16 on the stops 9. In this rest position, the shape and dimensions of the arms
- the latter When it is desired to redo the wire of a blade 18 of a knife, the latter is positioned in the cutout 4 until the wire of the blade is in contact with the three levers 11, at their crossing, as shown in FIG. 2.
- the positioning and guiding of the blade 18 are facilitated by the fact that the arms 13 partially conceal the periphery of the cutout 4, which makes it possible to prevent the blade 18 from "biting" on one of the walls of the cutout 4 and thus increases its blunting.
- the guiding of the blade 18 is also facilitated by the rounded shape of the edge F of the arms 13.
- the blade In this position, if one presses on the blade 18 while carrying out a translational movement from front to back, the blade is forced 18 to be inserted into the slot 5 extending the cutout 4 to an end position where the blade 18 is in the vicinity of the closed end of the slot 5, as shown in Figure 4.
- the blade rubs on the polished part of the edge F of the arms 13 and thus becomes sharp.
- the slight defects of the blade, caused by impacts on the edge of the blade are corrected.
- the first step is to passage of the blade between the ridged ends 14 before reforming the wire of the blade 18 by rubbing on the polished part of the edge F. This thus completes, if necessary, the sharpening of the blade by prior sharpening.
- the blade 18 is permanently maintained and guided between the levers 11.
- the cutting edge of the blade 18 is permanently supported on three contact points formed by the crossing zone of the levers and particularly by their arm 13.
- the force exerted by each lever on the blade is identical and progressive during the path of the blade. Indeed, the closer we get to the end 14 of the arms 13, the greater the effort to keep the blade 18 in contact with the levers 11 must be significant in order to balance the restoring force exerted by the counterweights 16.
- This force increases when the blade 18 is approached from the end of the slot 5 by leverage: the distance between the points of support of the blade on the levers 11 and the axes of rotation 10 of the latter increasing.
- This increase in the force exerted by each lever on the blade makes it possible to adapt the sharpening according to the zone of the blade where it is applied. Indeed, the blade is generally more worn in the first third of its length from the tip of the blade.
- This part of the blade 18 is positioned in the sharpening zone formed by the ends 14 so that the sharpening of this part of the blade is optimal.
- a homogeneous and effective sharpening is obtained.
- the levers 11, under the effect of their counterweights 16, return to their initial position. Their travel is stopped by the stops 9.
- the stops 9 are made of elastomer or of another damping material, this makes it possible to attenuate, or even to suppress, the noise generated by the “impact” of the ends 160 of the counterweights 16 on the stops 9.
- the shape of the stops 9 also participates in the absorption of the impact, avoiding the rebound of the ends 160 of the counterweights 16 on the stops 9.
- a sharpening device is obtained whose operation is silent, this which is particularly significant given the generally noisy environment encountered in the food industry and the frequency of use of sharpening devices.
- the length of the central stop 7 is adapted so that a lever 11 can be forced through the other side of the stop 7, relative to its rest position. This is facilitated, for example, by a clearance made between the washers 12 and the levers 11. In this way, a lever 11 is maintained, as shown in FIG. 5, in a position where it is moved as far as possible from the leg 3. In this position, called cleaning, the levers 11 and in particular the counterweights 16 are easily accessible which makes it possible to clean them, for example by a high pressure jet.
- the stop is surrounded by a sleeve made of a protective material, for example an elastomer, rubber or polymer.
- FIG. 6 illustrates a second embodiment of the device. In this case, the levers 11 'are shown in the rest position.
- the arms 13 ′ are longer than that of the arms 13 and the ends 14 ′ are of sufficient size to bear against the stops 9 ′.
- the latter are of identical shape to the stops 9 or, as shown in Figure 6, of cylindrical shape.
- the counterweights 16 ' have a shape adapted so that their end 160' are not in contact with the stops 9 '.
- the support 2 is shown with a shape of the transverse bar 6 ′ different from that of the bar 6, similarly the leg 3 ′ does not have a gripping member 32. It can be provided, in a configuration not shown, levers 11 'as described above, mounted on a support 2 identical to that described in the first embodiment. In another configuration, the shape and curvature of the arms 13; 13 'are different from those described.
- the shape and dimensions of the cutout 4 and the slot 5 are adapted to those of the arms.
- the arm 13; 13 'of at least one lever 11; 11 ' has an edge F striated over the entire length of the arm and no longer only at the end 14; 14 '.
- the arm 13; 13 'of at least one lever 11; 11 ' has a polished edge F over the entire length of the arm, including the end 14; 14 '.
- four or five levers can be arranged in staggered rows in order to increase the number of contact points between the blade and the levers in the sharpening zone of the blade.
- a support 2 can be fitted with levers 11; 11 'on both sides.
- All levers 11; 11 'fixed on the same face of the support 2 have, for example, their edge F polished or striated over the entire length of the arms 13; 13 'and all the levers 11; 11 'fixed on the other face of the support 2 have, respectively, their edge F striated or polished over the entire length of the arms 13; 13 '.
- Such a device makes it possible to carry out, independently, the sharpening and sharpening of the blades. It is also possible to fix, on each face of the support 2, levers 11; 11 'as described above, that is to say with a polished edge F in the curved part of the arm 13; 13 'and striated at the end 14; 14 '.
- Such a device can, for example, be used alternately by two users on adjoining workstations.
- the shape of the counterweight arm 16 may be different from those shown, for example parallelepiped.
- the number and the arrangement of the orifices 17 or other means for hooking additional counterweights, for example hooks can be considered.
- Other materials than stainless steel can be envisaged, in particular for the support. It can be a food-type polymer.
- the stops 7, 9; 9 ' can be of shape and dimensions other than those described, for example they can be of rectangular or triangular shape.
- stops and / or arms and / or a support equipped with an identification means for example colored stops or markings on the support.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food-Manufacturing Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0402272A FR2867098B1 (fr) | 2004-03-04 | 2004-03-04 | Dispositif d'affilage de lame d'outil coupant a main |
| PCT/FR2005/000502 WO2005087437A1 (fr) | 2004-03-04 | 2005-03-03 | Dispositif d’affilage de lame d’outil coupant a main |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1722927A1 true EP1722927A1 (fr) | 2006-11-22 |
| EP1722927B1 EP1722927B1 (fr) | 2007-11-21 |
Family
ID=34855054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05732684A Expired - Lifetime EP1722927B1 (fr) | 2004-03-04 | 2005-03-03 | Dispositif d'affilage de lame d'outil coupant a main |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7503241B2 (fr) |
| EP (1) | EP1722927B1 (fr) |
| JP (1) | JP2007526137A (fr) |
| DE (1) | DE602005003457D1 (fr) |
| FR (1) | FR2867098B1 (fr) |
| WO (1) | WO2005087437A1 (fr) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070101826A1 (en) * | 2002-11-12 | 2007-05-10 | Southern Mechanical & Structural, Inc. | Knife sharpener |
| DE102006041538B3 (de) * | 2006-09-05 | 2008-01-10 | Friedr. Dick Gmbh & Co. Kg | Schärfvorrichtung für Messerklingen |
| SE532368C2 (sv) * | 2008-05-02 | 2009-12-22 | Tore Eklund | Anordning för bearbetning av en egg eller en kant, samt slipblock utformat för ändamålet |
| FR3020299B1 (fr) | 2014-04-23 | 2016-05-20 | Dassaud Fils | Dispositif d'affilage d'une lame d'outil coupant a main |
| GB2519852B (en) * | 2014-09-12 | 2015-10-07 | Scott Cutters Ltd | Tool for conditioning a blade of a plastering tool |
| SE539499C2 (en) * | 2015-05-21 | 2017-10-03 | Eklund Tore | A grinder / polisher apparatus and a grinding element for that |
| US9545703B1 (en) * | 2015-08-10 | 2017-01-17 | Razor Edge Systems, Inc. | Miniature knife sharpening apparatus |
| US10399208B1 (en) * | 2017-05-31 | 2019-09-03 | Razor Edge Systems, Inc. | Protected blade edge knife sharpening apparatus |
| USD900582S1 (en) * | 2019-07-09 | 2020-11-03 | Harald Stallegger | Knife sharpener |
| USD884451S1 (en) * | 2019-09-19 | 2020-05-19 | ChaoWu Li | Portable metal knife sharpener |
| WO2022015412A1 (fr) * | 2020-07-17 | 2022-01-20 | Primedge, Inc. | Affûteuse de lames |
| USD1062410S1 (en) * | 2022-10-18 | 2025-02-18 | Donghe Biotechnology (Shenzhen) Co., Ltd. | Knife sharpener |
| USD1104694S1 (en) * | 2024-03-17 | 2025-12-09 | Xiaocui He | Knife sharpener |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4494340A (en) * | 1982-12-29 | 1985-01-22 | Oy Fiskars Ab | Hand-held dual knife sharpener |
| US4934110A (en) * | 1985-04-22 | 1990-06-19 | John Juranitch | Edge sharpening apparatus |
| US4751795A (en) * | 1986-01-27 | 1988-06-21 | Jenne Walter F | Knife sharpener |
| US5040435A (en) * | 1991-01-31 | 1991-08-20 | General Housewares Corp. | Knife edge deburring apparatus |
| US5655959A (en) * | 1993-08-20 | 1997-08-12 | Juranitch; John | Knife edge sharpener |
| US5505107A (en) * | 1994-03-04 | 1996-04-09 | Ibp, Inc. | Method and apparatus for sharpening cutting blades |
| US5478272A (en) * | 1994-07-07 | 1995-12-26 | Cozzini, Inc. | Blade sharpening apparatus |
| US5440953A (en) * | 1994-09-22 | 1995-08-15 | Tru Hone Corporation | Knife sharpener |
| DE10052439C1 (de) * | 2000-10-23 | 2001-10-31 | Alois Spreitz | Messerschärfvorrichtung |
| US6866569B2 (en) * | 2002-11-14 | 2005-03-15 | Cozzini, Inc. | Blade sharpening apparatus |
-
2004
- 2004-03-04 FR FR0402272A patent/FR2867098B1/fr not_active Expired - Fee Related
-
2005
- 2005-03-03 WO PCT/FR2005/000502 patent/WO2005087437A1/fr not_active Ceased
- 2005-03-03 US US10/590,361 patent/US7503241B2/en not_active Expired - Fee Related
- 2005-03-03 JP JP2007501313A patent/JP2007526137A/ja active Pending
- 2005-03-03 DE DE602005003457T patent/DE602005003457D1/de not_active Expired - Lifetime
- 2005-03-03 EP EP05732684A patent/EP1722927B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005087437A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080041190A1 (en) | 2008-02-21 |
| FR2867098A1 (fr) | 2005-09-09 |
| DE602005003457D1 (de) | 2008-01-03 |
| EP1722927B1 (fr) | 2007-11-21 |
| WO2005087437A1 (fr) | 2005-09-22 |
| US7503241B2 (en) | 2009-03-17 |
| FR2867098B1 (fr) | 2006-05-05 |
| JP2007526137A (ja) | 2007-09-13 |
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