JP5578631B2 - Sharpening tools - Google Patents

Description

  The present invention relates to a tool for correctly sharpening a kitchen knife.

The knife includes a single-edged knife as shown in FIG. 1 (a) and a double-edged knife as shown in (b).
The back side of the single-edged knife is approximately flat, but the Japanese knife has a recess called a back ski 18. In the table, a cutting blade 12 is attached to the blade 11, a stepped portion called a serpentine line 13 is formed at the boundary, and the tip is a cutting edge 14.
A double-edged knife has cutting edges on the front and back. Some are made so that the cross-sectional shape is different between the front and back.

The structure of the blade is an important factor that determines the character of the knife.
FIG. 2 shows a typical blade structure. Exaggerated for easy understanding.
(A) is a stepped shape and is found in an inexpensive Kenting.
(B) is a clam shape, and it can be said to be an ideal structure because of its bite, strength, and good handling.
(C) is a structure with a main blade, which is sharp with a sharp edge, but is likely to cause chipping or cracking.

  FIG. 3A shows the fine structure of the blade edge. The angle of the cutting edge 12 is about 18 degrees to 25 degrees. It is preferable to attach a small blade 15 to the cutting edge. The small blade is a small one having a width of about 0.02 to 0.2 mm and an angle of about 30 to 35 degrees. The small blade is sharpened so that a fine sawtooth 16 is formed, and this sawtooth further improves the sharpness. A small blade edge 17 of about 1 μm exists at the tip of the small blade. It is said that there is almost no decrease in sharpness due to the attachment of a small blade, and the sustainability of the sharpness is 10 times that without the blade.

  The blade has another necessity. The material of Kenting is hardened steel or stainless steel. Steel has a fine structure. When it is sharpened, chipping occurs due to dropping of grains such as carbide particles. In the case of stainless steel, a very thin burr grows greatly at the cutting edge as shown in FIG. The blade is effective in preventing and removing these. In some cases, it may be effective to remove the burrs from the edge of the small blade by raising the blade to about 45 degrees, which is 15 degrees or more of the half-width of the small blade, and lightly sharpening.

The blade is generally straight, but this part is also clam-shaped, and some have been devised to give sharpness and durability. Patent Documents 1 and 2 are sharpening tools for attaching a clam-shaped small blade.
FIG. 3B shows a straight blade and FIG. 3C shows a clam blade.

From the cutting point to the chin (blade tip on the handle side), the cutting blade is a straight line, and it is a good condition for keeping a certain angle.
Most of Patent Documents 3 to 8 have been commercialized as tools for reshaping and maintaining the linear shape of the cutting edge.
Patent Document 9 has been filed as a tool for keeping the angle of the cutting blade from the blade tip to the jaw constant in addition to the linear shape of the cutting blade.

The sharpness of the knife is better the thinner the blade. The lower the durability and rigidity, the lower. The result of a device that balances sharpness with durability and rigidity is a clam blade and a small blade.
The clam blade is also added with an effect of improving the handling performance. With a flat blade, food or the like sticks to the flat surface and the biting resistance increases, and the cut food or the like sticks to the surface and is difficult to peel off. This adsorption force is greater than expected due to the presence of moisture. Samplability means that biting and peeling are easy, and the slight curved surface of the clam blade helps the inflow of air and reduces the vacuum adsorption phenomenon. It is easy to understand if you can imagine that it is easy to peel off the vacuum-sucked material from the edge instead of peeling it straight.

Razor blade angle is said to be 15 degrees or more. Compared to this, if you quantify the blade of Kenting as follows, you can see that the blade structure of Kenting is thinner and sharper than you might expect.
In the case of a thin blade knife, the blade body has a maximum thickness of 1 to 2 mm. Assuming a 40 mm wide wedge shape, the wedge angle is about 3 degrees. Even if the surface has a slight curvature, the partial radius of curvature is approximately 200 mm or more, and the tangent angle at the blade edge is about 6 degrees. If sharpened as it is, it will have a sharp edge. Even a large 6 degrees is as thin as 0.1 mm at a position of approximately 1 mm from the cutting edge.

The sharp angle that is applied to the blade by sharpening the knife is the first angle, the second angle is the angle that is applied to the cutting blade, and the third angle is the angle that is applied to the small blade.
In summary, the first angle is about 5 degrees for the thin blade knife, the second angle is about 18 to 25 degrees, and the third angle is about 30 to 35 degrees.
And it is said that it is best to adjust the way of attaching each angle, the size, the shape, the difference between the front and back according to the object to be cut and the purpose, and there are a wide variety of professional specifications.
On the other hand, domestic kitchens are made with a compromise line so that they are moderately suited for multipurpose use.

In general, reshaping refers to sharpening the cutting edge. There are many people who do not know the effectiveness of the blade, so it is not always attached.
Because the cutting edge is narrow, it is difficult to keep the angle constant unless you are used to it. Many ideas have been devised for a long time to keep the angle constant. (Patent Document 9)
A simple sharpener is a tool that sharpens only the cutting edge with a small rotating grindstone or a die plate.

However, if you don't sharpen the blade, you can't really cut it. This sharpening is called sharpening wholesale or pulling to the back (sharpening). In English it is flatting. Re-sharpening is performed until the width of the cutting edge becomes excessive, and if re-sharping is performed several times, it is preferable to perform one-time wholesale.
Sharpening is also necessary when repairing a chipped edge.

Sharpening is performed so that about 1/3 of the blade is shaved off. How much width is sharpened depends on the purpose and preference. In the case of a thin blade knife, the first angle by sharpening is around 5 degrees.
In order to give a rough standard for sharpening, it is recommended to attach a small blade with a blunt angle and sharpen until the blade disappears uniformly. This is particularly effective when there is a chip, when correcting the curve of the cutting edge, and when smoothing the curve of the cutting edge.
While observing the degree of sharpening and the amount of reduction of the standard edge, adjust the angle and force according to the position where pressure is applied and the grip of the handle, and sharpen evenly from the cutting edge to the chin.
If good sharpening and reshaping are continued, sharpening is not a major task, but sharpening and repairing blade chipping and correcting the blade to your own style require considerable effort. . In the case of large correction sharpening, it is faster to step from rough to medium.
Since this sharpening is basically sharpened to a flat surface, it becomes a step blade. In the case of this blade attachment, there is a case where it is sharpened with a finishing abrasive as it is and a small edge is stopped.

If the part of the step blade is rounded by rolling sharpening, it can be made into a clam shape. Even in the case of this blade attachment, it may be better to make it a fine clam shape. The thing to be careful about with rolling sharpening is to make sure that the blade is never rolled.
When making a clam shape, gradually sharpen. Use medium to finish grinding. “If the sharpening part is at the top of the cutting blade, there will be no problem.” If you leave a rough sharpening wound, if the sharpening of the cutting edge and the small edge is very small, the scratch will create a large chip on the cutting edge. is necessary. Therefore, it is better to finish with medium to medium finish.

When sharpening is complete, sharpen again. The cutting edge is formed with a constant sharpening angle such as 10 degrees. The angle may be changed between the front and back. For example, if you are a right-handed Kenting, sharpen the back at 8 degrees. At this time, in order to cut straight as intended, the front and back are sharpened slightly, such as 6: 4 or 7: 3.
The width of the cutting blade may be as narrow as about 0.2 mm when emphasis is placed on sharpness. At this time, the thickness at the position of the strainer is approximately 0.07 mm.

  Re-sharpening immediately after sharpening is a light sharpening and a single operation, so it is relatively easy to make the angles uniform. However, in the second and subsequent sharpening, there is a difficulty in making it the same as the previous angle. As the number of re-sharpening increases, the degree of sharpening also increases. If the angles are not the same, a step blade, a round blade, or a blade edge cannot be sharpened.

Here, the tools (Patent Documents 3 to 9) for making the re-sharpening angle constant are effective for those who are not accustomed.
If sharpening is repeated so that the cutting edge of the cutting edge is 1 mm from the cutting edge, the thickness at the position of the cutting edge becomes approximately 0.35 mm. The next sharpening should be done before this happens. If you sharpen it again, the amount of sharpening will inevitably increase, and the knife will wear out quickly. A tool that makes the angle constant is effective in the sense that the amount of reshaping is minimized with the reproducibility of the angle every time. If the angle is reproducible, the abrasive grains can be fine, and it is often only necessary to suddenly finish the mirror surface with a finishing grindstone.

  In addition, the tools of Patent Documents 3 to 8 do not have a uniform cutting edge angle from the cutting edge to the chin. In order to make the cutting edge angle from the cutting edge to the chin uniform, it is necessary to use a jig equidistant from the cutting edge as in Patent Document 9.

  In the case of the main blade attachment, omitting the insertion of the cutting blade and proceed to the next small blade stopper. Alternatively, the cutting edge is terminated as a light sharpening similar to a small edge.

When reshaping is finished, the blade is stopped. Sharpen sharply with a fine-grained grindstone with a tilt angle of 15 degrees, etc., and remove burrs. At this time, the direction of the front knife is approximately 45 degrees as shown in FIG. 5 (a), and the direction of the back knife is approximately 90 degrees as shown in FIG. 5 (b). In this case, fine sharp saw marks are generated on the small blade, and the sharpness of the cutting can be improved by several stages.
The small blade is a very small blade, also called a thread drawing blade, but is very effective for long cutting (maintaining a long sharpness).

  In order to make it even longer, the blade may be shaped like a clam as shown in FIG. 3 (c), but it is difficult to finish it uniformly by hand. Patent Document 1 is a device rather than a tool, and the fact that it holds patent rights for 18 years is presumed to be used as a production facility. Patent document 2 is a sharpener. General sharpeners can not make saw lines, so sharpness should be reduced. Since the blade cannot be thinned, there is a limit to the recovery of sharpness. On the manufacturer's homepage, it is written about Sharpener: "To get the sharpness back to the original purchase, please use a grindstone or use our re-grinding service (for a fee)."

No matter how well you sharpen, if the burrs remain, the sharpness will drop drastically.
If a long thin burr as shown in Fig. 4 cannot be removed sufficiently with a stainless steel knife, etc., first sharpen off sharply by setting the inclination angle of the sharpening to be larger than 15 degrees of the half-blade, and then stop the blade. Sometimes it is good. It may be better to do this work immediately after sharpening.
Burrs can also be removed by cutting or rubbing a grindstone base, wooden pedestal, hard rolled newspaper or hard cardboard.
Since burrs may remain not only at the cutting edge but also at the edge of the cutting edge, it is also effective to polish the entire knife with a wooden or wooden base.

The grindstone is roughly classified into rough grinding, medium grinding, and finishing grinding.
Roughing is made with about 120-400 abrasive grains. It corresponds to a diameter of about 150 to 40 μm.
The medium abrasive is made of abrasive grains of about 600-1500. This corresponds to a diameter of approximately 31 to 9 μm.
The finishing abrasive is made of about 4000-12000. It corresponds to a diameter of about 3 to 1 μm or less.

It is necessary to allow the grindstone to sufficiently absorb water and not grind it. The sharpening soup has a rolling effect and finer grinding of the falling abrasive grains, and has the effect of accelerating the sharpening and obtaining a smooth sharpening taste and finish.
Grind without excessive force, like sliding.
A grindstone that has been used for a long time is no longer flat. Good sharpening is not possible when sharpening with a curved whetstone. Therefore, it is necessary to correct the grindstone to a flat surface. There is a dedicated tool, but there is also a method of scraping it off by rubbing it on a flat cement block.

In this way, the work of sharpening, re-sharpening, and edge cutting is all manual work, most of which depends on skill. Many people do not know the three processes and repeat only the sharpening.
Since even sharpening cannot be done well, most people use simple sharpeners, rely on paid sharpening services, or buy new ones. One simple sharpener has sold 3 million units, so there are so many people who have taken temporary measures and are unable to experience full-fledged sharpness.
Sharpening is a work that is carried out while frequently checking the state of sharpening scratches and the amount of reduction of the standard blade, and finely adjusting the angle and how to apply the force and the position to press. .
Rolling sharpening that rounds off the sharpening edge of the sharpening blade into a clam shape can be fatal if the blade is rolled, so care must be taken.
No useful tools have yet been provided for full-fledged correct sharpening. In particular, a tool for making two clam shapes, a blade and a small blade, neatly, correctly, and simply has not been put into practical use.

Another reason why grinding with a grindstone is avoided is the maintenance of the grindstone.
It is necessary to soak the water in the water for about 30 minutes before using it. It is necessary to dry thoroughly after use. If it does not dry for several days, mold may occur on the main body, wooden base or box during storage as shown in FIG.
The wheel is heavy and fragile, so it can be dangerous and chipped if dropped, and drying and storage is a burden. If three types of rough grinding, medium grinding, and finishing grinding are prepared, more space is required for drying and storage.

  The grindstone that has been used for a long time does not have a flat surface. This correction work is a great effort. Although it would be a little better if a dedicated tool was used, when trying to correct it by rubbing against a familiar cement block, the correction effort is not a ratio of the sharpening effort, but a sweating work.

  Diamond grindstones are also sold as grindstones that do not require correction. Good quality is expensive. There is no need to immerse in water beforehand. However, it is meaningful to grind without flowing the soup with an ordinary grindstone, and the fallen abrasive grains are sharpened, gradually becoming finer, giving a smooth sharpening feel and a fine finish on the grain. With diamond wheels, clogging is more likely to occur due to the absence of renewal of abrasive grains, and sharp scratches are rough. If not handled carefully, diamonds may fall off. It ’s quick, but the sharpening feel is just one.

  A grindstone that does not require water is an oil grindstone. Consists of abrasive grains that are much harder than water wheels. Although the reduction is small, the polishing power is inferior and it is necessary to use it with force. Oil is used to improve sliding because the blade is rubbed against the grindstone. Cleaning up is hard because of the oil. From the point of sharpening ability, the water whetstone is excellent. The story of using an oil grindstone for sharpening Kenting is rarely heard in water-rich countries.

  The grindstone is heavy and expensive. A general grindstone has a width of 70 mm and a length of about 200 mm, and a weight of about 1 kgr. Even an artificial whetstone that is cheaper than natural whetstones costs 3000 to 7000 yen. There is a limit even if you want a large size because it is expensive.

As a method for precision processing of hard metal, there is a method called lapping in addition to a grindstone.
A soft polishing plate or lapping plate is used for mirror finishing, precision machining, and lapping of difficult-to-process materials. A portion of the hard abrasive bites into a soft polishing plate or lapping plate and is fixed, and the hard workpiece is wrapped. Precise processing is possible because the wear of the soft polishing plate and lapping plate is very small. The material of the polishing plate and the lapping plate is cast iron, metallic copper, resin mixed iron, resin mixed copper, metal tin, resin mixed tin, resin mixed ceramic, and the like. When polishing the reflector of an astronomical telescope, mold it with a petroleum pitch, insert a groove like a grid, and apply abrasive such as Bengala to polish the glass. From these, it can be seen how the base of the soft material is effective for precision polishing of the hard material.

However, wrapping has never been used in the field of sharpening Kenting. In the manufacture of Kenting, most of them are polished with a rotating grindstone, and finally the cutting edge is finished with a flat grindstone.
As with lapping, buffing is a method for polishing hard and hard objects. Although buffing is used in the manufacture of Kenting, it is used only for mirroring to create a beautiful appearance and is not used for polishing the cutting edge.

Japanese Patent No. 3925658 JP 2010-253657 Japanese Patent No. 3968101 Japanese Patent No. 4436385 Design Registration No. 1246732 Design Registration No. 1214859 Design Registration No. 1214723 Design Registration No. 1346367 Japanese Patent Application No. 2011-184855

The present invention solves the following various problems.
A. We provide a sharpening tool that can finish a large clam shape evenly and cleanly.
B. We provide a sharpening tool that can evenly and accurately attach small clam-shaped small blades.
C. A sharpening tool that does not require pre-water suction is provided.
D. To provide a sharpening tool that does not require drying.
E. Provided is a sharpening tool that does not require the work of correcting the sharpening surface to a flat surface.
F. We offer an inexpensive sharpening tool that does not increase in price even if it is large.
G. A sharpening tool that is light and does not take up space for storage.
H. Provide a simple auxiliary tool that keeps the width of sharpening wholesale constant from the cutting edge and makes the most uniform angle.
I. Provided is an improved auxiliary tool that can be used for resharpening with a uniform angle at the two corners and a claw-shaped small blade stopper in cooperation with the above sharpening tool. This auxiliary tool also reduces the number of sharpening and makes the entire sharpening work easier.
J. et al. A simple method for positioning these auxiliary tools at a predetermined distance from the blade edge and a cage for the same are provided.

In order to provide a clam shape with a large blade and a fine clam shape with a small blade, a portion 22 having a predetermined angle is added to a part of the grindstone 21 as shown in FIG. The part 22 having a predetermined angle will be expressed as a “guide part” in this document. The grindstone material may be a general grindstone or a diamond grindstone. In the case of attaching a clam shape with a small edge, it is not always necessary to have an abrasive in the guide portion. The guide part may be integrally molded as shown in FIG. 7A or may be assembled as shown in FIG.
The guide portion may be provided at one location, but it is preferably provided at two locations in order to simplify the sharpening of the front and back of the knife.

  It is assumed that the structure is made of a soft material structure 31 having a guide portion 22 as shown in FIG. This structure will be referred to as “sharp plate” in this document. By applying a polishing agent in which water, an emulsifying material, or a thickening material is mixed to powdery abrasive grains to the sharpening plate 31, a hard knife can be sharpened by a conventional method. The abrasive may be sprinkled with the abrasive powder and a small amount of water may be added. Abrasive grains may be mixed with water and an emulsifying material or a thickening material and applied as a compound. The compound is preferably aqueous for subsequent cleaning. The sharpening plate can be a solid shape such as cast iron in the shape of the grindstone of FIG. 7, or can be a molded structure 31 such as a copper plate as shown in FIG. The sharpening plate can have a shape that can be installed as it is as shown in FIG. 8A, or a shape that can be exchanged with the common base 32 as shown in FIG. 8B. A non-slip claw 33 can be attached to the sharpening plate 31 or the base 32 as shown in FIG.

As shown in FIG. 9A, the auxiliary tool 40 for uniforming the width of the sharpening wholesale is a tape made of a hard and extremely thin material. By making the width narrow, flexibility in the width direction is given. Affixed at a fixed distance from the blade edge 14. FIG. 9B is an AA cross-sectional enlarged view of FIG.
In order to apply the tape at a constant distance from the blade edge, it is easy to work if the tape is formed in an arc shape in advance.
This assistive tool is expressed as a “sharpening jig” in this document.

Re-sharpening and small blade stopper auxiliary tool 50 is an improved version of the sharpening tool disclosed in Patent Document 9 because re-sharpening after sharpening and sharpening of small blade stopper is light and wear of the auxiliary tool is small. is there. As shown in FIG. 10 (a), a thin, thin material tape 52 having a width narrowed to increase flexibility is provided on at least the upper surface of a flexible band 51 whose lower surface is adhesive or adsorbable. Affixed and affixed at a fixed distance from the cutting edge. FIG. 10B is an enlarged view of the AA section of FIG.
The adhesiveness and the adsorptivity are collectively referred to as “imposition” in this document. It is preferable that the surface attachment property of the lower surface of the band 51 can be reattached.

In order to attach the tool at a constant distance from the blade edge, it is easy to work if the auxiliary tool has an arc shape in advance.
When the method of fixing the narrow tape 52 is an adhesive or the like, only the tape 52 is replaced with a new one as wear progresses. When the fixing method is fixed by bonding or integral molding, the entire 50 is replaced with a new one as wear progresses.

  The structure is not limited to a structure in which a hard, narrow tape is fixed to a flexible band, but as shown in FIG. 10 (c), the entire band is made of a hard material, and an auxiliary is provided with a notch for increasing flexibility. There is also a method to use.

This assisting tool 50 or the sharpening tool of Patent Document 9 is expressed as a “re-sharpening jig” in this document.
"Sharpening jig" and "sharpening jig" are collectively referred to as "sharpening jig".

A gauge 60 for adhering two kinds of sharpening jigs at a fixed distance from the blade edge is a flexible band that is attracted to a knife by a magnetic force as shown in FIG. A band 61 made of rubber or the like and a band 63 made of a rubber magnet or a resin magnet are used.
A number of cuts 64 may be made to increase flexibility.
It is easy to use if a curve 65 close to a general cutting edge curve is provided in advance.

  When the gauge 60 is adsorbed so as to protrude from the blade edge 14 of the knife as shown in FIG. 11B, the blade 60 is rolled 92 on the cutting board 91 or the like as shown in FIG. It is bent and fixed along the curve of the blade edge 14 as shown in FIG. A sharpening jig such as a jig 50 is pasted along the back surface 66 of the gauge and pasted. This gauge will be referred to as “positioning gauge” in this document.

  The positioning cage is previously provided with a width suitable for the first and second corners. For that purpose, it is preferable to prepare two for front and back sharpening and two for front and back sharpening. Alternatively, there are two magnetic positioning gauges on the front and back, and a plurality of auxiliary bands, such as rubber, with a width suitable for the first and second corners are prepared. There is also a method of determining the position by sandwiching between sharpening jigs. If you want to use the first or second corner of your own style, you can also adjust the magnetic positioning cage or auxiliary band by cutting it to a suitable width with a cutter knife.

The large clam shape of the blade is traditionally made by rolling sharpening that rounds off the edge of a sharpening wholesaler. Instead of rolling sharpening, as shown in FIG. 12, the normal flat sharpening stroke is extended to the grindstone or the guide part 22 of the sharpening plate 31, so that the knife 11 is naturally inclined at a certain angle, The sharpening of the corners of the corrugated blade advances, and a uniform and clean clam shape is easily made. At this time, remove the sharpening jig.
In FIG. 12, the angle of the guide portion 22 is greatly drawn for easy understanding. The left side of the figure shows the sharpening of the back of the Kenting, and the right shows the state of sharpening the front of the Kenting.
By adjusting the position where the knife is pressed, the position and degree of rounding can be finely adjusted. A fine finish will result if fine abrasive grains are used.

A finely shaped clam shape with a small edge can be produced by using a re-sharp jig and a grindstone or a sharpening plate having a guide portion.
As shown in FIG. 13 (a), when the sharpening jig 50 is used to sharpen the flat portion 23 of the grindstone or the sharpening plate 31, a straight cutting blade having a uniform angle from the cutting edge to the jaw can be sharpened.
After the desired width of the cutting edge is obtained, the sharpening stroke is extended to the grindstone or the guide portion 22 of the sharpening plate 31 as shown in FIG. Clam-shaped blades can be made. At this time, the sharpening jig 50 is left mounted.
FIG. 13C schematically shows the change in the angle of the center line 19 of the kitchen knife. When the blade edge 14 is at the boundary between the guide portion 22 and the flat surface portion 23, the blade edge hits the flat surface portion 23 at an angle obtained by adding the angle of the guide portion to the second angle, which becomes the third angle. When the re-grinding jig 50 reaches the flat surface portion 23, the angle at which the cutting edge portion hits the flat surface portion is the second angle. In other words, a minute curve having a tangent line from the second corner to the third corner is a clam-shaped blade.

Although the grindstone 21 integrally having the guide portion 22 as shown in FIG. 7A can be manufactured, it is difficult to perform a correction process by hand when it is worn.
As shown in FIG. 8, by replacing the grindstone with the sharpening plate 31, manufacturing becomes easy, and advantages such as light weight, low cost, and stacking are added. Even greater is the ease with which it is not necessary to breathe water and can be stored immediately if the water is wiped off. It wears less and lasts longer, eliminating the need for flattening that is necessary for ordinary grindstones. Since it can be manufactured by a press, it is inexpensive, and since it is inexpensive, it is easy to replace it when it is worn out, and workability can be improved by making a large-size sharpening plate.

As shown in FIG. 8B, when the sharpening plate 31 is placed on the common base 32 in a replaceable manner, the sharpening plate 31 becomes simpler, lighter, cheaper, more compact, and easier to store.
FIG. 8D illustrates a state of being stored in an overlapping manner. It is convenient to place the sharpened jigs, positioning cages, and abrasive compound containers on top of each other.

A grindstone alone or a grindstone with a wooden base generally lays a wet cloth on a wooden pedestal placed on a sink or a fence to prevent slipping, but as shown in FIG. By forming the four corners of the mounting edge of the sharpening plate in the form of (b) or the base 32 in the form of (b) into the claw 33 to prevent slipping, it is not necessary to clean up after the wet cloth and it is convenient.
If the claw at the three corners is fixed and the claw at the one corner is adjustable, it is possible to eliminate rattling caused by distortion of the wooden pedestal.

  The abrasive becomes finer as it is sharpened, and becomes finer than the grain size of the abrasive used, and the transfer to the next finer grain is smooth. Mirror finish is also possible in the final finish.

  If you do not mind the occurrence of a few scratches due to residual abrasive grains, when polishing, even if you apply rough abrasive compound and start sharpening, if you sharpen as it is, the abrasive grains will become finer and progress to intermediate finish You can also. In that case, only one type of sharpening plate and abrasive compound may be used, and it is possible to reduce the cost and compactness.

  When an abrasive is used as a compound, the replenishment of water is very small. Since the amount of moisture used is small, the amount of abrasive that spills out is small, and the dripping or offset abrasive can be returned to its original state with a finger, so the efficiency of use of the abrasive is high. There is little resistance to sharpening, and a light and smooth sharpening feeling can be obtained.

  When emulsifying material is added to the aqueous compound, the iron powder black candy adhering to the fingers can be washed away with water.

  Abrasive grains are economical because they use only the required amount. There is no generation of useless abrasive grains that are scraped off by straightening unlike ordinary grindstones, and there is no waste of throwing away thinned stones by repeated correction. The abrasive itself is inexpensive and can be purchased in a distributed manner, so it is economically easy with little initial investment.

  The positioning gauge can easily follow the shape of the cutting edge and is simple. As shown in FIGS. 11B and 11C, even in the case of a double-edged knife, two positioning gauges 60 can be simultaneously attracted to the front and back one by one and can be positioned by one rolling 92. Since rolling can be performed on a cutting board 91 or a wooden pedestal, the blade edge 14 is not damaged and is safe. The cutting edge 14 does not hit the positioning gauge 60 and the positioning gauge is not consumed. Since the cutting edge 14 is covered with the positioning gauge 60, the affixing work of the sharpening jig such as the regrinding jig 50 is also safe. Since the positioning gauge accurately sets the distance from the cutting edge each time, the sharpening conditions each time have high reproducibility.

  A positioning gauge with moderate flexibility draws a smooth curve, so if you use a positioning gauge when the curve of the cutting edge of the knife is partially out of order, the out-of-order cutting edge will not match the positioning gauge and will be visible. It can be used to check the cutting edge curve.

  When sharpening is performed using a sharpening jig positioned and pasted at a predetermined distance from the cutting edge with a positioning gauge or the like, a beautiful sharpening with a substantially constant width along the cutting edge curve can be performed as shown in FIG. Extra scratches caused by trial and error sharpening can also be avoided. The number of operations for cleaning and wiping the knife and turning it over and checking is reduced, and it is only necessary to monitor with a focus on the uniform driving of the small blade. The first corner is uniform from the blade edge to the chin. The first corner or the sharpening width can be controlled only by the distance from the blade edge to the sharpening jig.

As shown in FIG. 13 (a), when using a regrind jig 50 positioned and pasted at a predetermined distance from the cutting edge with a positioning gauge or the like, regrinding is performed with the flat portion 23 of the grindstone or the sharpening plate 31, Sharpen a straight cutting edge with a uniform angle from the cutting point to the chin.
Re-sharpening just after sharpening is small, so the amount of sharpening is small, and the second and subsequent sharpenings are excellent in angle reproducibility, so the amount of sharpening is small. A sharp sharpness can be reproduced.
Because the amount of sharpening is small, you can increase the number of reshaping and reduce the number of sharpening wholesale, which makes the entire sharpening work easier.

As shown in FIG. 13B, a small edge is stopped using a regrinding jig 50 positioned and pasted at a predetermined distance from the cutting edge with a positioning gauge or the like, and a grindstone or a sharpening plate 31 with a guide portion 22. And, it can be finished into a small blade with a uniform clam shape from the cutting edge to the chin.
Since the reproducibility of the sharpening conditions is good even with the second and subsequent small blade stoppers, the minimum blade stopper can be used. The sharpness of the blade is further improved by sharpening the blade.

An improved reshaping jig 50 as shown in FIG. 10 is less expensive than that of Patent Document 9.
In the reshaping jig of Patent Document 9, depending on the material of the sharpening plate, the squealing sound that the high-hardness ceramic chip rubs against the sharpening plate may be annoying. This sound is not generated in the case of a grindstone, but is only one more compatible with the sharpening plate of the present invention. If a hard plastic tape 52 is used instead of the high-hardness ceramic chip, the generation of this sound can be prevented.
Since a continuous tape 52 is attached instead of a plurality of protrusions of wear-resistant tips, the sharpening jig does not get caught on the corners of the sharpening plate even when it is moved obliquely.
Although abrasion of the tape 52 occurs, light abrasion with a sharpening plate after sharpening is small, and the amount of wear at one time is so small that it can be used for a considerable number of times. When the tape 52 is used as an adhesive, it can be easily reattached and is inexpensive. Even when the tape is integrated, replacement is not a burden because the whole 50 is inexpensive.

FIG. 1 is an explanatory view of a single-edged knife and a double-edged knife. FIG. 2 is an explanatory diagram of the structure of the blade. FIG. 3 is an explanatory diagram of the fine structure of the cutting edge. FIG. 4 is a diagram showing burrs grown on the cutting edge. FIG. 5 is an explanatory diagram of the direction of the knife in the front and back sharpening. FIG. 6 is a copy of a mold on a grindstone box caused by insufficient drying. FIG. 7 is an explanatory diagram of a grindstone having a guide portion. FIG. 8 is an explanatory view of a sharpening plate. FIG. 9 is an explanatory view of a sharpening and wholesale jig. FIG. 10 is an explanatory view of an improved reshaping jig. FIG. 11 is an explanatory diagram of the positioning cage. FIG. 12 is an explanatory view of sharpening a blade clam shape with a sharpening plate. FIG. 13 is an explanatory diagram of re-sharpening with a re-sharpening jig and a clam-shaped small blade stopper used in combination with a sharpening plate. FIG. 14 is a diagram showing a state of sharpening with a substantially constant width. FIG. 15 is an explanatory diagram of the first embodiment. FIG. 16 is a copy of a sharpened sharpened knife. FIG. 17 is an explanatory diagram of the third embodiment. FIG. 18 is an explanatory diagram when using and storing the third embodiment.

  The objective of simply sharpening the kitchen knife into the correct clam shape has been realized as a tool that can be used at home.

FIG. 15 shows the tool of the present invention that was experimentally manufactured.
As shown in FIG. 15A, the base 32 was formed by cutting an extruded aluminum material having a thickness of 2 mm and a width of 65 mm into a channel shape having a height of 12 mm. The length was 350 mm.
It was bent 5 degrees in a direction perpendicular to the position 50 mm from one end. The opposite end was bent 5 degrees in a 45 degree direction at 50 mm and 115 mm positions. The cuts for bending were filled with epoxy adhesive. In FIG. 15A, (a1) is a plan view, and (a2) is an AA cross-sectional view.
Claws 33 are formed at the three corners, and a claw 34 supported by a fulcrum is pressed at the one corner by a spring 35, and the structure is configured such that a fixing screw is fastened to the adjustment long hole. After loosening the fixing screw of the movable claw 34, the fixed claw 33 was pressed so as to be in close contact with the wooden pedestal, and the movable claw 34 which was pressed by the spring 35 and was in close contact with the pedestal was fixed. The base 32 is in close contact with the pedestal at four points, and the outward claws 33 and 34 are caught on the wooden pedestal to prevent slipping.

  As shown in FIG. 15B, the sharpening plate 31 was bent so that a plate having a width of 75 mm and a length of 380 mm was in close contact with the base 32. At both ends, a 10 mm wide arc was bent so that even a sharpening jig with a wear tip was not caught. A hook 36 that bites into the base is adhered and attached to the surface on the base side. On the opposite side, a U-shaped rubber 37 fitted on the base was attached. With this hook and the U-shaped rubber, the sharpening plate 31 is fixed to the base 32 without play.

  Separately, as a tool for sharpening the sharpened blade into a clam shape, a sharpening plate 31B having an angle of the guide portion 22 of 1 degree was created as shown in FIG. This was made by reinforcing the back of a copper plate having a thickness of 0.5 mm with hard vinyl chloride having a thickness of 5 mm.

Two types of rough abrasive compound were prepared by mixing # 40 gold sand, toothpaste and water, and # 250 alundum, toothpaste and water. The volume ratio is about 1: 10: 3.
The medium grain size abrasive compound was prepared by mixing abrasive grains obtained by shaving No. 800 medium grinding stone, toothpaste and water. The volume ratio is about 1: 10: 3.
The finished abrasive compound was prepared by mixing a toothpaste paste and water with No. 9800 liquid compound for mirror polishing of a vehicle body, and then volatilizing and removing the petroleum solvent. The volume ratio is about 3: 10: 3.
Rough abrasive and medium-grain abrasive compounds were used for sharpening. The finished abrasive compound was used for resharpening and small blade stop.

Several types of sharpening plate materials were tested.
Aluminum sharpening plates are very strong. However, in the case of rough abrasive grains, a small amount of abrasive grains may also bite into the soft iron portion of the steel of Kenting, and a large frictional resistance may be generated between the sharpening plate and the aluminum sharpening plate. Aluminum sharpening plates are not suitable for roughing and need to be used for medium to finishing. Although it is clear from experience that polishing aluminum with a general grinder is not successful, it is speculated that the viscous nature of this aluminum may cause frictional resistance.

  A sharpening plate made of an acrylic plate with a thickness of 2 mm has a smooth sharpening feeling and a sharpening strength. However, when the blade edge of a knife is sharpened, a sharp mistake in the work may make a cut on the sharpening plate. If you cut the cut, there will be no problem, but it will be caught immediately after it occurs.

  Rigid PVC plates are easy to cut and cannot be used.

  The copper plate sharpening plate did not have the above-mentioned problems, and was smooth and moderately strong.

The amount of the abrasive compound used is about 1 cc for rough sharpening, and about 2-3 cups of ear picking for medium sharpening and finishing sharpening.
As you sharpen, it will turn black with an iron spear. If the stickiness increases, apply a little water on your fingertips. A small amount of water supply is good.
The black-sharpening soup on the tools and the knife can be easily washed away with water. The dirt on fingers can be easily washed away with water. If the abrasive is melted only with water, the nails and fingerprints will remain dirty. Accordingly, it is preferable that an aqueous emulsion material is mixed in the abrasive compound.

As shown in FIG. 15C, the positioning cage 60 was formed by cutting a rubber magnet having a thickness of 3 mm and a width of 10 mm into a length of 150 mm. Since the rubber magnet is hard because the magnetic material is kneaded, 14 notches having a depth of 5 mm are made at intervals of 10 mm to increase flexibility. Four positioning cages were prepared.
The positioning cage is used with the cut side as the cutting edge side of the knife.

  As shown in FIG. 15D, the sharpening jig 40 was a tape having a width of 5 mm and a length of 150 mm obtained by sticking a double-sided tape to a PET sheet having a thickness of 0.2 mm. Two pieces were prepared for each sharpening.

Two 10 mm wide positioning cages were juxtaposed in parallel to obtain a width of 20 mm and adsorbed so as to protrude from the blade edge of the knife, and then the knife was rolled on a wooden table to follow the blade edge.
A sharpening jig 40 was attached so as to be along the back of the positioning cage.

Although this sharpening jig was worn, it was able to withstand a single sharpening.
If it is removed after use, it will be rounded due to processing strain, etc., so it is disposable once.
Durability is sufficient even if the tape material is soft like soft vinyl chloride, but it is difficult to apply the tape along the back of the positioning cage. Although there is a method of cutting along the positioning cage with a cutter knife, it is not preferable because the cutter is scratched on the knife. Therefore, the sharpening jig is preferably made of a hard material.
FIG. 14 shows the result of grinding and polishing in this way.

When the polishing of the medium abrasive grains was completed, the sharpening jig 40 was removed.
A sharpening plate 31B having an angle of one guide portion 22 was used, and the area around the shinsuji was pushed with a finger to sharpen the blade clam shape with medium abrasive grains.

  As shown in FIG. 15D, the regrind jig 50 is a 1.5 mm thick rubber plate formed into an arc-shaped band having a width of 15 mm, a radius of 500 mm, and a length of 145 mm. A strong detachable double-sided tape was attached to the bottom surface. A PET plate tape having a thickness of 0.2 mm, a width of 5 mm, and a radius of 500 mm was attached to the end of the upper surface with a double-sided tape. Two were created.

One positioning cage 60 having a width of 10 mm was adsorbed on the front and back of the knife one by one so as to protrude from the blade edge, and then the knife was rolled on a wooden table to follow the blade edge.
The jig 50 was re-sharpened so as to be along the back of the positioning cage, and the jig 50 was attached.

  A small amount of finished abrasive grain conbound was applied to the sharpening plate 31 whose guide part was 5 degrees, and the cutting edge was sharpened by reshaping on the flat portion 23 of the sharpening plate. The degree of sharpening is mild, about 30-50 strokes.

As it was, the sharpening stroke was extended to the guide part 22 and a claw-shaped small blade stopper was performed. The degree of sharpening is mild, about 10-20 strokes.
When the direction of bending of the guide portion was 45 degrees, the blade edge of the front face of the knife was stopped. At this time, as shown in FIG. On the side where the bending direction of the guide part was a right angle, the blade was fixed on the back of the knife. At this time, as shown in FIG. When the direction of the small blade stopper on the front and back intersects 45 degrees, a fine saw-tooth is made on the small blade, and the sharpness of the cutting is remarkably improved.

  The sharpened jig 50 was peeled off and washed with a neutral detergent. After washing, the adhesive surface that can be re-applied becomes clean, and the re-grinding jig can be reused. The tape hitting the sharpening plate was insignificant.

The knives with finishing abrasive grains were lapped on a wooden pedestal to remove burrs.
Trial cuts were made with newspaper. The result was sharp enough to be cut with newspaper.

  FIG. 16 is a copy of a knife with a blade-shaped clam shape, a thin cutting edge, and a clam-shaped small blade. Changes in the shape of the surface can be read because the straight ruler is curved.

  After using the sharpened knife for cooking for a while, only the sharpening of the paragraph numbers [0078] to [0082] and the small blade stopper were performed. When using a re-sharpening jig, a light sharpening operation with finished abrasive grains was sufficient, and sharp sharpness was recovered immediately.

I sharpened the cocoons with a copper polishing plate and No. 40 gold sand compound. The diameter of the 40th grain is about 0.5 mm.
At first, the sharp sharpening progressed, the sound gradually became quieter, and the sharpening became smoother. Occasionally collecting the compound with fingers would make a sizzling sound with the remaining large rugged sand, but it eventually became smooth. As a result of replenishing with a small amount of water from time to time, the sharpness of the salmon that had become slack was completely restored. When viewed with a magnifying glass, there was a scratch, but it looked like a medium whetstone. Even if you begin to grind with an extremely rough abrasive compound, you can still grind to the middle finish. The scratches are due to abrasive grains that have bite into the polishing plate and remain, but as they are further sharpened, they should all become smaller and have a cleaner finish.

In the first embodiment, a tool is made with a structure that can be handmade, but an ideal example of a tool that is manufactured by press working or the like will be described as a third embodiment.
FIG. 17 shows the components.

  FIG. 17A shows the base 32. An aluminum plate having a thickness of 2 mm is punched in the form of an outward claw 33 attached to three corners, and the long side is bent at 105 degrees to form an edge 71. The upper surface 72 has a width of 80 mm and a length of 400 mm. The height of the edge 71 is 30 mm. In the remaining corner, a movable claw 34 is supported by a fulcrum, pressed with a spring, and fixed with a screw through a long hole. (a1) is a front view, (a2) is a side view. The number is one.

  FIG. 17B shows a sharpening plate 31B for sharpening. The edge 73 is fitted to the base 32. The shortest part of the edge 73 is 10 mm deep. Both ends have guide portions 22 with an inclination angle of 1 degree, the left side is bent at right angles and the right side is bent at 45 degrees. It is better to include a small rounded corner at the bend boundary. The shortest length of the planar portion 23 is 220 mm. A copper plate having a thickness of 1 mm is drawn and punched out leaving a 5 mm collar 74. (B1) is a front view, (b2) is a side view, and (b3) is a plan view. The number in the advanced set is 2 for rough and medium sharpening. The number in the standard set is 1 and is used for both rough and middle sharpening.

  FIG. 17C shows a sharpening plate 31 for reshaping. The edge 75 is fitted to the base 32. The shortest part of the edge 75 has a depth of 10 mm. Both ends have guide portions 22 with an inclination angle of 5 degrees, and the left side is bent at right angles and the right side is bent at 45 degrees. It is better to include a small rounded corner at the bend boundary. The shortest length of the planar portion 23 is 220 mm. A copper plate having a thickness of 1 mm is drawn and punched out leaving a 5 mm punch 76. (C1) is a front view, (c2) is a side view, and (c3) is a plan view. The number in the advanced set is two, for medium sharpening and finishing sharpening. The number of the standard set is one and is for finishing sharpening.

FIG. 17 (d) shows the positioning cage 60. The rubber magnet 63 has a thickness of 3 mm and a length of about 150 mm, and has an arc shape with a radius of about 500 mm. 14 cuts 64 are made at intervals of approximately 10 mm. The inner edge of the cuts punches a 1 mm diameter circle to avoid stress concentration. Even when the positioning cage is bent to a straight line, a V-shaped cut is made so that a gap is opened.
60-1 is used for positioning the sharpening jig 40 and has a width of 20 mm. The depth of the notch 64 is 15 mm. The number is two for front and back.
60-2 is used for positioning the sharpening table of the re-grinding jig 50 and has a width of 10 mm. The depth of the notch 64 is 5 mm. The number is one.
60-3 is used for positioning the back of the sharpening jig 50 and has a width of 12 mm. The depth of the notch 64 is 7 mm. The number is one.

  FIG. 17E shows a sharpening jig 40. The back of a PET sheet having a thickness of 0.2 mm is attached to the release paper 77 as an adhesive, and is half cut by leaving the release paper in a radius of 500 mm, a width of 5 mm, and a length of 150 mm. When using, remove one by one. When the width of the release paper is 80 mm or less, the release paper fits in the base 32 and is convenient for storage. 14 sharpening jigs can be created with one sheet. Since it is a consumable item, it is better to prepare multiple copies.

  FIG. 17 (f) shows the regrind jig 50. The lower surface of the rubber band 51 having a thickness of 1.5 mm, a radius of 500 mm, a width of 15 mm, and a length of about 150 mm is used as a peelable adhesive surface, and an adhesive PET tape having a thickness of 0.2 mm, a radius of 500 mm, and a width of 5 mm is formed at the upper end. 52 is pasted. When the sharpening jig 40 is affixed as the tape 52, the parts can be shared, which is convenient. It is good to affix on the storage plate 78 and store. The number is two.

  The polishing compound is prepared by mixing glycerin, sorbite liquid or the like with a moisturizer, sodium alginate, sodium carboxymethyl cellulose, xanthan gum or the like as a thickener, and mixing an alumina-based abrasive or silicon carbide with water. Propylene glycol, which is said to be a moisturizer for toothpaste, is not used because it has a very high skin penetration. Three types of particle sizes are prepared: 250, 1000, and 10000. Easy to use if it is in a tube.

  FIG. 18A shows the shape of the use state in which the sharpening plate 31 is fitted to the base 32 and placed on the wooden pedestal 93. FIG. 18B shows a state in which the base and four sharpening plates are stacked and stored. Four positioning gauges, several sharpening jig sheets and two regrinding jigs are stored in the base 32.

  In this way, the knife of the present invention that sharpens the blade and the blade with a clam shape correctly does not need to be submerged, dried and straightened, is inexpensive and convenient to store, reduces the labor of sharpening, sharp and sharp and long All of the objectives have been achieved.

The material of the sharpening plate is not limited to copper in this embodiment, and various metals, plastics, composite materials, and the like are conceivable.
The sharpening plate has a higher function by having a guide part. However, if the chamfer shape is not sharpened, the one without the guide part is also worthy of maintenance.
The direction of the guide part boundary line of the sharpening plate is not limited to a right angle and 45 degrees as in this embodiment.
The bending angle of the guide portion of the sharpening plate is not limited to 1 degree and 5 degrees as in this embodiment.
In this embodiment, the sharpening plate is wrinkled, but it is for facilitating punching after drawing and is not necessarily required.
The non-slip claw is not limited to the outward direction of this embodiment, and may be inward or downward.
The material of the sharpening jig is not limited to the PET of this embodiment. Various materials such as polycarbonate can be considered.
The shape of the sharpening jig is not limited to the arc shape of this embodiment.
The thickness of the sharpening jig is not limited to the thickness of this embodiment.
The material of the tape for the reshaping jig is not limited to the PET of this embodiment. In addition, the common use with the sharpening jig as in this embodiment is not a condition of the invention.
The shape of the sharpening jig is not limited to the arc shape of this embodiment.
The thickness of the reshaping jig is not limited to the thickness of this embodiment.
The composition of the polishing compound is not limited to that of this embodiment.
The notch of the positioning gauge or the integrated reshaping jig is not limited to the | -shape or V-shape, but may be other shapes such as a U-shape.

  Although the present invention has been described as a sharpening tool for a clam blade, the present invention can be applied to all the fields of sharpening with a conventional grindstone if the flat portion of the sharpening plate is used. Wide range of applications such as knives, scissors, scissors, scrapers, tools.

11 Blade
Reference Signs List 12 Cutting Blade 13 Shining Line 14 Cutting Edge 15 Small Blade 16 Saw 17 Small Cutting Edge 18 Back Ski 19 Center Line 21 Grinding Wheel 22 Guide Portion 23 Plane Portion 31, 31B Sharpening Plate 32 Base 33 Claw 34 Movable Claw 35 Spring 36 Hook 37 U-shaped rubber 40 Sharpening jig 50 Re-grinding jig 51 Band 52 Tape 60 Positioning gauge 61 Band of rubber, etc. 62 Magnet chip 63 Band of rubber magnet, resin magnet, etc. 64 Notch 65 Curve 66 Back surface 71 Base edge 72 Upper surface 73 Edge of sharpening plate B 74 Edge of sharpening plate B 75 Edge of sharpening plate 76 Edge of sharpening plate 77 Release paper 78 Storage plate 91 Cutting board 92 Rolling 93 Wooden base

Claims (4)

  A band that is flexible in the width direction, with one side sticky or adsorbent, and at least one side of the opposite side of the band is a material with little wear. Jig used for repair and small blade stop. A grindstone having a guide portion having a length and an angle in which the cutting edge of the knife with the jig according to claim 1 forms a third angle with respect to the plane portion at the boundary with the plane portion, which is used for sharpening a chamfer shape of a small blade. Or sharpening plate.   Grinding jig that adsorbs a flexible band of a certain width adsorbed by magnetism so that it protrudes toward the cutting edge, rolls the cutting edge, makes the band follow the cutting edge curve, and uses the back as the reference position for positioning How to wear. The positioning gauge used in the method of claim 3 , wherein a plurality of cuts are made in a band having a certain width that is magnetically attracted to increase flexibility.