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
  • 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
• • 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
  • B24B27/00—Other grinding machines or devices
  • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
• • 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
  • B24B41/00—Component parts such as frames, beds, carriages, headstocks
  • B24B41/06—Work supports, e.g. adjustable steadies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
  • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
  • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
  • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
  • B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
  • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor

Definitions

• the present invention relates to an automatic knife sharpener, and more particularly, to an automatic knife sharpener, in which two elastic grinding discs in stead of a grinding stone or a grinding bar are opposed to each other and partially pressurized to thereby enhance a degree of contact of a knife blade, and which can decompose oil stained on the surface of the blade using water and a cleaning material at the same time with grinding of the blade.
• the user grinds the knife blade manually without using the motor while contacting a grinding bar or a grinding whetstone, which has fine groove on the surface thereof, with the knife blade.
• an object of the present invention to provide an automatic knife sharpener, in which two grinding discs made of an elastic material are partially pressurized in the shape of "V", thereby always maintaining the performance of the knife blade in the optimal state since a grinding angle of the knife blade is sharp and a grinding area is large and maintaining the performance of the knife blade as it is even though the knife blade is not frequently grinded since an angle of the grinded blade is generally sharp.
• Another object of the present invention is to provide an automatic knife sharpener, in which grinding discs is light, is easy to manufacture and is convenient to replace, thereby realizing simplification and minimization of equipments and considerably reducing unit costs of the product and components.
• a further object of the present invention is to provide an automatic knife sharpener that water and a cleaning material can be used simultaneously to easily remove oil, thereby reducing a grinding period of time by promoting grinding and improving a grinding efficiency, and enhancing the precision and sharpness of a knife blade.
• an automatic knife sharpener comprising: a rotary shaft; first and second rotating plates adapted to be rotated together with the rotary shaft; first and second grinding discs respectively mounted on the first and second rotating plates in a movable and loose-fitting way, the first and second grinding discs having a grinding material mounted on the surfaces thereof and being oppositely mounted to each other in such a way that the blade is inserted therebetween; and partially pressurizing means for pressurizing a side of the first grinding disc and a side of the second grinding disc such that the first grinding disc and the second grinding disc are rotated in a state where they engage with each other with the blade interposed between the first grinding disc and the second grinding disc.
• the rotary shaft can be rotated by mechanical or electric power, and in a preferred embodiment of the present invention, rotated by a motor, which is operated by electricity.
• the present invention provides an automatic knife sharpener, which can grind a knife blade using a motor, comprising: a main body; a motor mounted on the main body and generating rotational driving power; a power supply for applying electric power to the motor; first and second rotating plates detachably mounted on the rotary shaft of the motor and rotating together with the rotary shaft; first and second grinding discs respectively mounted on the first and second rotating plates in a movable and loose-fitting way, the first and second grinding discs having a grinding material mounted on the surfaces thereof and being oppositely mounted to each other in such a way that the blade is inserted therebetween; and partially pressurizing means for pressurizing a side of the first grinding disc and a side of the second grinding disc such that the first grinding disc and the second grinding disc are rotated in a state where they engage with each other in the shape of "V" when they are viewed from the top with the blade interposed between the first grinding disc and the second grinding disc.
• first grinding disc and the second grinding disc respectively have hemispherical protrusions and the first rotating plate and the second rotating plate respectively have hemispherical grooves corresponding to the hemispherical protrusions, so that the first grinding disc and the second grinding disc are mounted on the first rotating plate and the second rotating plate in the movable and loose-fitting way.
• the partially pressurizing means is freely rotatably mounted on a rotating member hinge-coupled by a hinge shaft mounted on the main body, and includes: a first pressure roller elastically pressurized in a direction of the first grinding disc by an elastic spring mounted between the main body and the rotating member; and a second pressure roller mounted on a cover of the main body for pressurizing the second grinding disc together with the first pressure roller when the cover of the main body is closed.
• the cover is hinge-coupled with the main body, a closed shield is mounted at a blade entrance, a locking device is mounted between the main body and the cover, a waterproof packing is mounted between the main body and the cover, and a waterway groove is formed on the external side of the blade entrance.
• a blade supporter is mounted between the first grinding disc and the second grinding disc, the blade supporter being freely rotated.
• the automatic knife sharpener further includes: a rotary safety switch connected to the power supply so as to be automatically operated when the blade is put therein and to automatically stop its operation when the blade is withdrawn therefrom, the rotary safety switch being hinge-coupled and horizontally mounted under the blade entrance; and an indirect safety switch hinge-coupled and vertically mounted at a side of the blade entrance of the main body so as to be manipulated with a user's hand.
• the grinding disc includes a hole formed at the center thereof for allowing a rotary shaft to pass therethrough, a plurality of round protrusions formed on a side thereof so as to be fit to a rotating plate, and a grinding material formed on the other side thereof.
• the first grinding disc and the second grinding disc are constructed by adhering diamond grinding stone or sand paper to a thin elastic steel sheet.
• the automatic knife sharpener according to the present invention can always keep the optimal state in performance of the knife blade since a grinding angle of the knife blade is sharp and a grinding area is large, and keep the performance of the knife blade as it is even though the knife blade is not frequently grinded since an angle of the grinded blade is generally sharp.
• the automatic knife sharpener can achieve simplification and minimization of an equipment and considerably reduce unit costs of the product and components since the grinding discs are light, easy to manufacture and convenient to replace.
• the automatic knife sharpener can reduce a grinding period of time and enhance the precision and sharpness of the blade since water and a cleaning material can be used simultaneously to easily remove oil.
• an automatic knife sharpener includes: a main body 10, a motor 11, a power supply 12, a first rotating plate 13 and a second rotating plate 14, a first grinding disc
• a hinge-coupled cover 20 is mounted at a side of the main body 10, and serves as a case for covering and protecting the motor 11.
• the motor 11 is mounted on the main body 10 to generate turning power by receiving electric power from the power supply 12.
• the power supply 12 supplies electric power to the motor 11 according to a user's manipulation of the rotary safety switch 18 and the indirect safety switch 19.
• first rotating plate 13 and the second rotating plate 14 are detachably mounted on a rotary shaft 21 of the motor 11, and rotate together with the rotary shaft 21.
• first grinding disc 15 and the second grinding disc 16 are respectively mounted on the first rotating plate 13 and the second rotating plate 14 in a movable and loose-fitting way.
• the first grinding disc 15 and the second grinding disc 16 may be constructed in such a way that several pieces of sandpaper 23 are adhered on a thin elastic steel sheet 22 as shown in FIGS. 7 and 8, or that a diamond grinding stone 24 is coated on the thin elastic steel sheet 22 as shown in FIGS. 9 and 10.
• the first grinding disc 15 and the second grinding disc 16 respectively have a number of hemispherical protrusions 25, and the first rotating plate 13 and the second rotating plate 14 respectively have a number of hemispherical grooves 26 corresponding to the hemispherical protrusions 25.
• the partially pressurizing device 17 pressurize sides of the first grinding disc 15 and the second grinding disc 16 in such a way that the first grinding disc 15 and the second grinding disc 16 are rotated in a state where the blade 1 is located between the first grinding disc 15 and the second grinding disc 16 and the first grinding disc 15 and the second grinding disc 16 engage with each other in the shape of "V" when they are viewed from the top.
• a pressurizing device 17 includes a first pressure roller 171 shown in FIGS. 3 and 4 and a second pressure roller 172 shown in FIGS. 2 and 6.
• the first pressure roller 171 is rotatably mounted on a rotating member 28 hinge-coupled to the main body 10 via a hinge shaft 27 mounted on the main body 10, and elastically pressurized in a direction of the first grinding disc 15 by an elastic spring 29 mounted between the main body and the rotating member 28.
• the second pressure roller 172 is mounted on the cover 20 of the main body 10, and so, pressurizes the second grinding disc 16 together with the first pressure roller 171 when the user closes the cover of the main body 10.
• the first pressure roller 171 and the second pressure roller 172 are respectively engaged-rotated in contact with the first grinding disc 15 and the second grinding disc 16, and respectively have inclined faces 173 in such a way that they form an angle in the shape of "V", and elastic layers 175 formed on the external side of a metal rotary shaft 174 and a synthetic resin layer 176 and made of rubber, urethane, silicon or others.
• the first pressure roller 171 and the second pressure roller 172 partially pressurize only some portions of the first grinding disc 15 and the second grinding disc 16, so that the first grinding disc 15 and the second grinding disc 16 are elastically bent in the shape of "V" when they are viewed from the top, whereby contact areas of the first grinding disc 15 and second grinding disc 16 to the blade 1 are maximized to thereby cut the blade 1 generally sharply.
• the hemispherical protrusions 25 of the first grinding disc 15 and second grinding disc 16 are coupled with the hemi- spherical grooves 26 of the first rotating plate 13 and the second rotating plate 14 loosely to thereby transfer the turning power of the motor 11, and at the same time, can move from side to side to thereby keep the rotation of the"V"form between the first grinding disc 15 and the second grinding disc 16.
• a blade-shaped selection lever 30 for moving the first pressure roller 171 back and forth is mounted in such a way as to be caught by a multi-stage groove 31 mounted on the main body 10, and selectively pressurizes the first pressure roller 171 according to kinds of the blade, namely, a single-side blade or a double-side blade.
• a plate spring 39 may be mounted for pressurizing the first pressure roller 171 in a direction to move the first pressure roller 171 backwardly.
• the cover 20 of the main body 10 is hinge- coupled with the main body 10, a closed shield 32 is mounted at a blade entrance 20a, and a locking device 33 is mounted between the main body 10 and the cover 20.
• a waterproof packing 34 is mounted between the main body 10 and the cover 20 as shown in FIG. 2, and a waterway groove 35 may be formed on the external side of the blade entrance 20a as shown in FIG. 13.
• a freely rotating blade supporter 36 is mounted between the first grinding disc 15 and the second grinding disc 16 to prevent that the blade is sprung out due to a collision with the rotary shaft of the motor 11.
• the blade supporter 36 includes a metal layer 38 formed on the external surface thereof and having a blade groove 37 contacting with the blade 1.
• the rotary safety switch 18 is connected to the power supply 12 so as to automatically operate when the blade 1 is put into the blade groove 37 and automatically stop the operation when the blade 1 is withdrawn therefrom, and laterally mounted and hinge-coupled under the blade entrance 20a of the main body 10.
• the indirect safety switch 19 is hinge- coupled and vertically mounted to a side of the blade entrance 20a of the main body 10 in such a way that the user can manipulate it manually.

Applications Claiming Priority (2)

Publications (1)

Family

ID=38102987

Family Applications (1)

Country Status (2)

Cited By (6)

Families Citing this family (4)

Citations (4)

• 2006
  • 2006-06-20 KR KR1020060055189A patent/KR100692261B1/ko not_active IP Right Cessation
• 2007
  • 2007-05-30 WO PCT/KR2007/002616 patent/WO2007148878A1/en active Application Filing

Patent Citations (4)

Also Published As

Similar Documents

Legal Events