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

Definitions

• the invention relates to a device for manually sharpening knives and other cutting edges with exchangeably held hard metal plates.
• the devices according to DE 197 03 807 C1 or US 5 588 340 only use a hard metal plate with which a knife edge must first be sharpened from one side of the cutting edge and then from the other side.
• Such sharpeners with a single hard metal plate are suitable for sharpening different types of cutting edges, e.g. of knives, scissors, tools of various types or even ski edges.
• the hard metal plate will be set at a wrong angle for sharpening or that it will tilt, which leads to unsatisfactory sharpening results.
• the hard metal plates are held interchangeably according to US Pat. No. 6,142,038, US Pat. No. 5,291,805 or US Pat. No. 3,149,506, so that plates that have become unusable can be exchanged or replaced.
• the hard metal plates are placed in suitably shaped recesses in the device body, which fix them downwards and to the side.
• the plates are screwed individually according to US Pat. No. 6,142,038 and secured according to US Pat. No. 5,291,805 or US Pat. No. 3,149,506 by means of an angled part, which in turn is fastened to the device body by a screw.
• the hard metal plates are also shaped as rectangles and the depressions are arranged in this way. arranges that the same plates can be exchanged at one point when closed, and / or rotated again at another point.
• the snap locking of a cover plate provided according to the invention for fixing the hard metal plates in their depressions avoids the disadvantages of a screw connection.
• it is an inexpensive means of quickly and reliably fixing the hard metal plates upwards and is nevertheless easy to remove again without tools.
• the device Due to the flat underside of the handle and holding part provided according to the invention and the hard metal plates aligned parallel to this flat underside, the device can be placed on a base, for example with a protruding functional part on the edge of a table top, and pressed on with one hand while holding it with the other hand knife to be sharpened is pulled vertically down through the V-shaped sharpening zone.
• the situation of a horizontal sharpening device and the vertical knife guide proves to be ergonomically favorable and easily leads to good sharpening results.
• Figure 1 a perspective view of the embodiment obliquely from above (in
• Figure 2 is a perspective view of the embodiment obliquely from below (in
• Figure 3 a plan view without the snap locking parts and without the
• Figure 4 a side view
• Figure 5a Representation of a hard metal plate in a rectangular shape with two holes in the longitudinal axis from above and in cross section;
• Figure 5b Representation of a hard metal plate in a rectangular shape with two offset holes from above and in cross section;
• Figures 1 to 4 show an embodiment of a device for manually sharpening knives and other cutting edges in different views.
• the device consists of a shaft-shaped handle and holding part 1, which has a flat underside 1a.
• a functional part 2 which receives crossed, flat superimposed hard metal plates 3a, 3b and encloses them except for a recess 4.
• the V-shaped sharpening zone 5 is accessible through the recess 4 at the intersection of the hard metal plates 3a, 3b for the cutting edge to be sharpened.
• the flat sides of the hard metal plates 3a, 3b are aligned parallel to the flat underside 1a of the handle and holding part 1.
• This functional part 2 is particularly suitable for sharpening smooth knives.
• the handle and holding part 1 is placed with its flat underside 1a on a flat base, for example a table top, in such a way that the edge of the table top lies against the stop 2a.
• the applied handle and holding part 1 can now be pressed onto the base with one hand, the pressure being exerted by the body weight, while a knife to be sharpened is pulled vertically downward through the V-shaped sharpening zone 5.
• the device must be guided freely over such cutting edges.
• the further functional part 6 has a stop 6a with which the hard metal plate 7 can be guided along a cutting edge at the angle typical of scissor cutting. This stop 6a is designed in the direction of the handle and holding part 1 at the same time as finger protection if the device slides or the like when the hard metal plate 7 is guided over a cutting edge. This requires the stop 6a to protrude sufficiently.
• the individual parts of the device are manufactured as plastic injection molded parts.
• the handle and holding part 1 is stiffened and stabilized by honeycomb structures.
• the two identical hard metal plates 3a, 3b which have rectilinear edge sections with which they form the V-shaped sharpening zone 5 as a result of their intersection, are interchangeably inserted in suitably toned depressions 8a, 8b in the functional part 2.
• the deeper recess 8a cuts off part of the shallower recess 8b so that the required crossing of the hard metal plates 3a, 3b can take place.
• the lower contact surface of the depressions 8a, 8b can be flat or (for example for manufacturing reasons) structured; it only has to ensure stable support of the hard metal plates 3a, 3b.
• the depression 8a is flat at the bottom, while a recess and frame-like structure can be seen in the depression 8b.
• the contact surface of the shallower recess 8b lies exactly one plate thickness above the contact surface of the deep recess 8a.
• the upper hard metal plate 3b thus partially lies on the hard metal plate 3a inserted below.
• pins 9 protrude from the bottom of the recesses 8a, 8b, each of which engages as a counterpart in corresponding recesses 10 in the hard metal plates 3a, 3b.
• the recesses 10 in the hard metal plates 3a, 3b are two cylindrical bores in the respective longitudinal axis of the plates, as shown in FIG. 5a; the cone shape and its location in the recesses are determined accordingly.
• the hard metal plates 3a, 3b have the same shape, have rotational symmetry with regard to their outer contour and with respect to the recesses 10, and the position of the depressions 8a, 8b and the pin 9 in the functional part 2 is selected appropriately, this means that by exchanging the hard metal plates 3a, 3b between the depressions and / or by rotating the hard metal plates 3a, 3b each form different edge sections of the hard metal plates 3a, 3b the V-shaped sharpening zone 5.
• a hard metal plate pair 3a, 3b can thus be better utilized before it becomes unusable due to wear.
• a rotation of the hard metal plates 3a, 3b, which makes the upper side to the lower side, is ruled out, however, since the sides of the hard metal plates 3a, 3b in the sharpening zone area must be slightly beveled in order to develop their sharpening effect.
• the plate edge on the top which also represents the working edge, thus protrudes slightly above the plate edge on the underside (FIGS. 5a and 5b - cross sections).
• the angle of this slope is usually in the range of about 6 °. Since this slight inclination is hardly noticeable to the eye, it is advisable to mark the top.
• the hard metal plates 3a, 3b have a rectangular shape and two bores 10 in the longitudinal axis of the plate, that is to say rotational symmetry when rotated through 180 °.
• the position of the depressions 8a, 8b in the functional part 2 is also such that the point of intersection of the hard metal plates does not come to lie exactly in the middle of a rectangular side. Then by exchanging the hard metal plates between the depressions and / or by rotating the hard metal plates in four produce a V-shaped sharpening zone 5 from different edge sections of the hard metal plates 3a, 3b.
• the hard metal plates 3a, 3b inserted into the depressions are fixed upwards by means of a cover part 11 with a releasable snap lock, as shown in FIGS. 1 and 2.
• this has two molded tabs 12 on one side, with which it engages in suitable holding slots of the functional part 2.
• the snap latch 13 on the side of the cover part 11 opposite the tabs 12 engages through an opening 14 in the functional part 2 and snaps into place there in a releasable manner.
• the different height of the plates 3a, 3b arranged one above the other is compensated for in the shape of the cover part 11 by a correspondingly different internal structure 15. As shown in Figure 2, it can be web-like elevations.
• both hard metal plates 3a, 3b are held firmly in their depressions 8a, 8b by the locked cover part 11.
• the locked cover part 11 fits flush into the outer shape of the device.
• a single hard metal plate 7 is interchangeably inserted into a slot-shaped receptacle 16 with a width that exactly corresponds to the plate thickness.
• a snap locking part 17 is again provided, which engages over the hard metal plate 7 from the front in the middle, in the manner of a bracket and flush, and from which at least one snap bracket 18 engages behind the hard metal plate 7 in the further functional part 6.
• the second bracket of the snap locking part 17 can grip around the hard metal plate 7 from behind, so that it pulls the hard metal plate 7 with it when the released snap locking part 17 is removed.
• the snap locking part 17 naturally only covers a narrow strip of the usable edge of the hard metal plate 7.
• the outwardly projecting section of the snap locking part 17 can be designed as a further stop for an object with a cutting edge to be sharpened, for example as a 90 ° stop for sharpening ski edges.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Scissors And Nippers (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Professional, Industrial, Or Sporting Protective Garments (AREA)
• Food-Manufacturing Devices (AREA)
• Details Of Cutting Devices (AREA)
• Knives (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Paper (AREA)
• Clamps And Clips (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=27797685

Family Applications (1)

Country Status (8)

Families Citing this family (14)

Family Cites Families (14)

• 2002
  • 2002-03-12 DE DE10210745A patent/DE10210745B4/de not_active Expired - Lifetime
• 2003
  • 2003-03-10 WO PCT/EP2003/002442 patent/WO2003076137A1/fr active IP Right Grant
  • 2003-03-10 AT AT03711959T patent/ATE307701T1/de active
  • 2003-03-10 JP JP2003574390A patent/JP2005519777A/ja active Pending
  • 2003-03-10 EP EP03711959A patent/EP1483082B1/fr not_active Expired - Lifetime
  • 2003-03-10 ES ES03711959T patent/ES2251681T3/es not_active Expired - Lifetime
  • 2003-03-10 US US10/507,439 patent/US7066796B2/en not_active Expired - Fee Related
  • 2003-03-10 DE DE50301498T patent/DE50301498D1/de not_active Expired - Fee Related
  • 2003-03-10 AU AU2003218719A patent/AU2003218719A1/en not_active Abandoned

Non-Patent Citations (1)

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