JP5582880B2 - Polishing machine - Google Patents

Description

  The present invention relates to a polishing machine for polishing various blades such as knives and knives.

  Conventionally, a grinder in which two disc-shaped abrasive bodies are arranged in parallel is known. There has also been proposed an electric knife polishing machine that polishes the blade edge of a kitchen knife by rotating a rotary polishing body connected to the output shaft of the electric motor and abutting the blade edge of the knife (see Patent Document 1).

Japanese Utility Model Publication No. 4-083558

  However, in these grinders and electric knife grinders, the cutter may easily bounce off the rotating abrasive body, and the angle at which the cutter is polished may be difficult to stabilize.

  In view of the above, the polishing machine of the present invention includes a polishing body having a pair of polishing surfaces at both ends of a rotating shaft that rotates, a pair of side plates provided to face each of the pair of polishing surfaces, A polishing machine for polishing a blade provided with a polishing body and a casing provided so as to enclose the side plate, and a pair of polishing units between the pair of polishing surfaces and the pair of side plates. When the blade is inserted into the guide groove, the blade is pressed by the side plate.

  According to the polishing machine of the present invention, the angle of the blade edge after polishing can be easily stabilized, and a polishing machine capable of polishing a sharp blade can be provided.

It is a perspective view of a polisher in one embodiment of a polisher of the present invention. It is a front view of one embodiment of a polisher of the present invention. It is a rear view of one Embodiment of the polisher of this invention. It is a top view of one embodiment of a polisher of the present invention. It is a bottom view of one embodiment of a polisher of the present invention. It is a right view of one Embodiment of the polisher of this invention. It is a left view of one Embodiment of the polisher of this invention. It is an exploded perspective sectional view of one embodiment of a polisher of the present invention. It is a side view which shows the grinding | polishing state in one Embodiment of the polisher of this invention, (a) shows the grinding | polishing state on the right side, (b) shows the grinding | polishing state on the left side. It is an enlarged view of the grinding | polishing body in one Embodiment of the grinding machine as a reference , (a) is a side view, (b) is a front view. It is an enlarged view of the grinding | polishing body in other embodiment of the polisher of this invention, (a) is a side view, (b) is a front view. It is an enlarged view of the part a in FIG. 11 which is another embodiment of the polishing machine of the present invention.

  Hereinafter, an embodiment of a polishing machine of the present invention will be described with reference to FIGS.

  The polishing machine includes a polishing body 3, a housing 2 having a pair of guide grooves 4, an upper case 6 for loading them, and a lower case 7 having an electric motor (not shown) for rotating the polishing body 3. Configured.

  In addition, a dominant hand selection switch and a limiter for preventing malfunction are attached so that the protective cover cannot be attached in reverse.

  In the present embodiment, a polishing body having a pair of polishing surfaces at both ends of a rotating shaft that rotates, a pair of side plates provided facing each of the pair of polishing surfaces, and the polishing body and the side plates are wrapped. And a pair of guide grooves between the pair of polishing surfaces and the pair of side plates, and the guide grooves. When the cutter is inserted, the cutter is pressed by the side plate.

  Here, any pressing means may be used as long as it urges the blade 5 when the blade 5 is inserted. For example, it is appropriate to use an elastic body. In the present embodiment, a leaf spring is used as the pressing means.

As shown in FIG. 9 (projections are omitted) , the groove 4 is closed by the side plate 4a when the blade 5 is not inserted, but when the blade 5 is inserted, the side plate 4a slides sideways. Since the side plate 4a continues to press the side surface of the blade 5, it becomes easy to polish at a constant polishing angle without depending on the width of the groove 4.

  As shown in FIG. 10, in the polishing body 3, the polishing surfaces 3b are located at both ends of the rotating shaft 3a, and can be exchanged at any time according to the necessary count.

  Accordingly, by energizing the side plate 4a toward the blade 5, it is easy to limit the movement of the blade 5 to an appropriate range, so that the blade 5 and the polishing body 3 during the polishing operation It is possible to reduce the pressure fluctuation between the two.

  And since the pressure which makes the blade 5 contact | abut to the grinding | polishing body 3 can be stabilized, the blade edge | tip 5a can be made to contact | abut only to the specific position of the grinding | polishing surface 3b, Therefore The blade edge | tip corresponding to the blade 5 of various shapes, Spots in 5a are reduced, and smooth polishing is possible.

  Here, the distance between the polishing body 3 and the side plate 4a is 2 to 8 mm, and becomes narrower as it gets deeper. Here, the rotational movement can be easily realized by providing the polishing body 3 that rotates in one direction as the electric motor rotates, for example, as in an embodiment described later.

  Further, in this embodiment, the guide groove is closed by the side plate when the blade is not inserted, and is opened by being pushed away by the blade during polishing.

  As a result, the polishing debris does not scatter to the outside from the opposite guide groove, so that the polishing operation can be performed safely.

  Furthermore, the angle formed by the polishing surface and the side plate during polishing is 15 to 20 degrees.

  Here, the optimum angle is an angle for a small blade, and if it is within this range, the blade has a sufficiently larger angle than the large blade, and the occurrence of chipping can be reduced.

  Further, the count of the polished surface is from 400 to 800.

  Within this range, a polishing rate suitable for polishing a ceramic knife can be obtained.

  Next, a polishing machine having a particularly suitable polishing body will be described, for example, when polishing a blade having a large blade and a small blade.

  11 and 12, the polishing surface 3b of the polishing body 3 has a protrusion 3c and a periphery 3d, which indicates that the blade 5 is polished by the protrusion 3c and the periphery 3d. This polishing machine has a protruding portion that gradually protrudes toward the center of rotation of the polishing surface. The small blade 5c is roughly polished around the periphery 3d of the polishing surface 3b (not shown), and then the small blade 5c is finish-polished by the protruding portion 3c.

  As a result, the coarse polishing of the large blade 5b and the finish polishing of the small blade 5c can be performed simultaneously, and the large blade 5b can be finished as rough polishing and the small blade 5c can be finished as fine polishing.

  Here, generally, the large blade 5b is an angle formed by both surfaces of the blade 5 other than the blade edge 5a, and the small blade 5c is an angle formed by both surfaces of the blade 5 continuous to the blade edge 5a, and the blade 5c does not spill. As described above, the angle formed by both surfaces of the blade 5 is generally larger than that of the large blade 5b.

  Further, in the present embodiment, the protruding portion has a substantially conical shape.

  Accordingly, each of the large blade 5b and the small blade 5c can be polished simultaneously along the shape of the large blade 5b, which is efficient.

  Furthermore, in this embodiment, the angle formed by the polishing surface of the protrusion and the polishing surface around the protrusion is 15 to 45 degrees. Accordingly, the large blade 5b and the small blade 5c are formed by bringing the large blade surface 5b of the blade 5 along the periphery 3d of the polishing surface 3b and the small blade surface 5c of the blade 5 along the protruding portion 3c of the polishing surface 3b. The angle β can be set accurately.

  Furthermore, in this embodiment, the count of the polishing surface of the protrusion is set to be larger than the count of the polishing surface around the protrusion. As a result, the blade edge 5a is inserted into the groove 4 little by little, and the small blade 5c can be roughly polished by the periphery 3d and the finish polishing by the protruding portion 3c (not shown).

  Furthermore, in this embodiment, the count of the polishing surface of the protrusion is 600 or more and 800 or less, and the count of the polishing surface around the protrusion is 400 or more and less than 600. Thereby, rough polishing can be performed around 3d around the protrusion 3c, and finish polishing can be performed at the protrusion 3c.

  The material of the surface of the polishing body 3 is preferably diamond grains from the viewpoint of life as a grindstone, but the polishing body 3 itself may be any material that can be used as a grindstone, and only ceramics such as alumina and silicon nitride. It is not limited to.

  The material of the handle 2 and the housing 4 is suitably made of ABS resin, but may be a material such as PP (polypropylene) or PS (polystyrene).

Example 1
(Sample preparation)
By changing the conditions of the sample of the polishing machine shown in FIG. 10, a polished knife sample is prepared.

  Table 1 shows the conditions in which the presence or absence of the guide groove 4, the presence or absence of the side plate 4a, the angle α formed by the polishing surface 3b and the center line L, and the count of the polishing surface 3b were changed.

  The sample 9 corresponds to a polishing machine 8 such as a conventional grinder.

(Evaluation method)
Using the polishing machine 8 of each condition described in Table 1, the cutting edge 15a of a zirconia ceramic knife (large blade only) was sequentially polished.

  The polishing conditions were as follows: the metal knives were polished one edge at a time for 10 seconds, and the sharpness of each metal knife was compared using a Honda type sharpness tester.

  The conditions for this sharpness test are as follows: measurement environment is indoor, test paper is high-quality paper, paper shape is thickness 0.038 mm x width 8 mm, paper bundle is 400 sheets / bundle, load load is 800 g, sliding speed is Table 2 shows the result of measuring the number of sheets cut at that time by fixing the test paper and reciprocating the paper bundle once.

  In Table 2, o indicates 100 or more sheets, Δ indicates 50 to 99 sheets, and x indicates a number of cut sheets of less than 50 sheets.

  Since the metal knife bounces back at the time of grinding | polishing for the sample 9, since the angle was easy to become a spot, it is thought that the sharpness worsened.

  Since the metal knife swayed in the guide groove 4 in the sample 10, the angle was likely to be uneven, so that the sharpness was considered to be poor.

Samples 1 to 8 had good sharpness. In particular, Samples 2 and 3 were excellent in sharpness because the polishing angle α was in the optimum range, and Samples 6 and 7 were in the optimum range of the polishing surface 3b.
From these results, it can be seen that the effect of having the guide groove 4 and further urging the side plate 4a is effective. It was also confirmed that the angle α formed by the polishing surface and the center line and the count of the polishing surface 3b had an optimum range.

(Example 2)
(Sample preparation)
By changing the conditions of the sample of the polishing machine shown in FIG. 11, a polished knife sample is prepared.

  Table 3 shows the results obtained by preparing the polishing body 3 having the protruding portions 3c according to Example 1 and changing the angle β of the small blade 5c with respect to the surface of the large blade 5b of the blade 5 and evaluating it.

  Table 3 shows the cutting edge 15a of a ceramic knife (having a large blade and a small blade) 5 made of zirconia by fixing the number of the projecting portion 3c to 700 and the number of the surrounding 3d to 500 and changing the angle β. This is the result of polishing.

  In Table 3, for example, when the angle β is around 30 degrees as in the samples 12 to 14, the angle β formed by the large blade surface 5b and the small blade surface 5c of the ceramic knife 5 can be polished most appropriately. As a result, the sharpness result was the best.

  In the sample 11, since the angle β is small, there is not much distinction between the large blade 15b and the small blade 15c, and the blade is easily spilled and the sharpness may be deteriorated.

  In the sample 15, the angle β is large, and the cutting edge 15a formed by the small blade 15c becomes too obtuse and the sharpness may be deteriorated, but this is in a range where there is no problem in practical use.

(Example 3)
By changing the conditions of the sample of the polishing machine shown in FIG. 11, a polished knife sample is prepared.

  Table 4 shows the results obtained by preparing the polishing body 3 having the protrusions 3c according to Example 1 and evaluating the polishing surface 3b with different numbers.

  Table 4 shows the results of polishing the cutting edge 15a of a ceramic knife (having a large blade and a small blade) 5 made of zirconia while fixing the angle β to 30 degrees and changing the count.

  In Table 4, when the count of the polishing surface 3b was 400 or more and less than 800 as in samples 18 to 32, for example, an appropriate sharpness could be obtained.

  Furthermore, if the count of the polishing surface 3b of the protrusion 3c is larger than the count of the polishing surface 3d around 3d as in the samples 19, 20, 21, 22, 24, 25, 26, 28, 29, 30, 31, Furthermore, it was able to finish in a good sharpness.

  For samples 16 and 17, the surface finish of the small blade surface 5c was somewhat worse because the count at the periphery 3d on the polishing surface 3b was small, but this was in a range where there was no problem in practical use. It was.

  Moreover, about the samples 33-38, since the count in the protrusion part 3c in the grinding | polishing surface 3b was large, it had taken time for grinding | polishing of the large blade surface 5b, but in the range which does not have a problem on practical use. there were.

1: Polishing machine 2: Housing 3: Polishing body 3a: Rotating shaft 3b: Polishing surface 3c: Protruding part 3d: Periphery 4: Guide groove 4a: Side plate 5: Cutting tool 5a: Cutting edge 5b: Large blade (surface)
5c: Small blade (surface)
6: Upper case 7: Lower case α: Angle formed by the polishing surface 3b and the side plate 4a β: Angle of the small blade 5c with respect to the surface of the large blade 5b of the blade 5

Claims (5)

A polishing body having a pair of polishing surfaces at both ends of a rotating shaft that rotates, and
A pair of side plates provided facing each of the pair of polishing surfaces;
A polishing machine for polishing a blade provided with a casing provided so as to wrap the polishing body and the side plate,
The pair of polishing surfaces have protrusions protruding so as to gradually become higher than the surroundings as approaching the rotation center at the center including the respective rotation centers, and the polishing surfaces of the protrusions and the protrusions The angle formed with the surrounding polishing surface is 15 to 45 degrees,
A polishing machine having a pair of guide grooves between each of the pair of polishing surfaces and the pair of side plates, and when the blade is inserted into the guide grooves, the blade is pressed by the side plates. 2. The polishing according to claim 1, wherein the guide groove is closed when the side plate is urged when not polished, and is opened when the side plate is pushed away by the blade during polishing. Machine. Polishing machine as claimed in claim 1 or 2, wherein the protruding portion is substantially conical. The grinder according to any one of claims 1 to 3 , wherein a count of a polishing surface of the protruding portion is larger than a count of the polishing surface around the protruding portion. 5. The polishing machine according to claim 4 , wherein the number of the polishing surface of the protrusion is 600 or more and 800 or less, and the number of the polishing surface around the protrusion is 400 or more and less than 600. 6.

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