JP6687554B2 - Blade polishing tool - Google Patents

Description

  The present disclosure relates to a blade polishing tool.

  Conventionally, a blade sharpener for relatively easily polishing a knife such as a knife has been proposed. There are two types of blade polishing tools: a manual type in which a held blade is manually moved for polishing, and a mechanical type in which a blade is pressed against the polishing surface to be polished while mechanically moving a polishing body having a polishing surface.

  Metallic blades are highly flexible and can be polished relatively easily with both manual and mechanical types. On the other hand, a blade made mainly of ceramics (hereinafter also simply referred to as a ceramic blade) is harder and has a lower toughness than metal, so the contact angle between the polishing surface of the polishing body and the blade edge must be adjusted with high accuracy. If so, chipping is likely to occur due to polishing. Therefore, a relatively expensive mechanical-type polishing tool has been exclusively used for polishing the ceramic blade. Patent Document 1 below discloses an example of such a machine-type blade polishing tool.

JP, 2011-25401, A

  There is a demand for an inexpensive blade polishing tool that can regain high sharpness even when a ceramic blade is not damaged during polishing.

A blade polishing tool of the present disclosure includes a polishing body, a support that supports the polishing body, a base that is located below the support, and an elastic member and a guide member that are located between the support and the base. Equipped with. The polishing body has a shape in which a first portion and a second portion each having a truncated cone shape are attached to each other with their top surfaces facing each other, and the polishing body is connected to a shaft portion, and the support body is the shaft. A receiving portion for supporting the shaft portion rotatably. The support or the base has a hole opening on the surface facing each other, the elastic member is positioned immediately below the polishing body to support the support , the guide member, It is located around the elastic member and the polishing body so as to be engaged with the hole.

  Even though the price is relatively low, even ceramic blades have few chips that occur during polishing, and high sharpness can be restored.

1A is a perspective view, FIG. 1B is a top view, FIG. 1C is a side view, and FIG. 1D is a sectional view taken along line AA of FIG. FIG. 3A is a perspective view of a polishing body, and FIG. 3B is a perspective view of an assembly of a support and a base, showing components of the blade polishing tool of the present disclosure. FIG. 7A is a top view, FIG. 9B is a side view, and FIG. 9C is another side view showing an assembled state of a base, a support, and a polishing body in the blade polishing tool of the present disclosure. It is a schematic diagram which shows the cross section in the state which grind | polishes a cutting tool using the cutting tool polishing tool of this indication. It is a schematic diagram which expands and shows the cross section in the state which grind | polishes a cutting tool using the cutting tool polishing tool of this indication.

  Hereinafter, the blade polishing tool of the present disclosure will be described with reference to the drawings. However, in all the drawings of the present specification, the same parts are denoted by the same reference symbols and the description thereof will be omitted as appropriate unless confusion occurs. Further, in the following description, the blade polishing tool will be simply described as a polishing tool.

  1A and 1B show an embodiment of a polishing tool of the present disclosure, FIG. 1A is a perspective view, FIG. 1B is a top view, FIG. 1C is a side view, and FIG. Is. 2A and 2B show components of the polishing tool, FIG. 2A is a perspective view of a polishing body, and FIG. 2B is a perspective view of an assembly of a support and a base. 3A and 3B show an assembled state of a base, a support, and a polishing body in a polishing tool, FIG. 3A is a top view, FIG. 3B is a side view, and FIG. 3C is another side view. In FIG. 3A, the position of the guide groove is also shown by a broken line. FIG. 4 is a schematic view showing a cross section of a state in which a blade is polished with a polishing tool. FIG. 5: is a schematic diagram which expands and shows the cross section in the state which grind | polishes a cutting tool using a grinder.

  As shown in FIGS. 1 to 3, the polishing tool 1 includes a polishing body 10, a support body 20 for supporting the polishing body 10, a base 30 located below the support body 20, a support body 20, and a base body 30. The elastic member 50 and the guide member 60 located between them are provided. In addition, in the polishing tool 1 of the present disclosure, the support body 20 or the base 30 has the hole portions 70 that are opened on the surfaces facing each other. Although FIG. 4 shows an example in which the support 20 has the holes 70, the base 30 may have the holes 70.

  Then, in the polishing tool 1 of the present disclosure, as shown in FIG. 4, the elastic member 50 is positioned directly below the polishing body 10, and the guide member 60 is positioned so as to be engaged with the hole 70. . Here, “directly under” means a state in which the polishing body 10 and the elastic member 50 are overlapped with each other when seen through the top surface of the polishing tool 1. As shown in FIGS. 3B and 3C and FIG. 4, the support 20 is supported by the elastic member 50. Further, the phrase “positioned so as to be engaged” means that the elastic member 50 is movable in the expansion / contraction direction but is positioned so as to be engaged so as to suppress the inclination of the support member 20. . In other words, the guide member 60 keeps the posture and the moving direction of the support body 50 constant.

  The polishing tool 1 may include a cover body 40 that covers the rotating polishing body 10 as shown in FIGS. 1 and 4. The cover body 40 has a guide groove 42 that guides the blade 100 to the polishing body 10, and the guide groove 42 may have a groove width that becomes narrower toward the polishing body 10. If the approaching direction of the blade 100 guided by the guide groove 42 and the engaging direction of the guide member 60 and the hole 70 are the same, the moving direction of the blade 100 can be kept in the direction along the guide groove 42. .

  The polishing body 10 is connected to the shaft portion 11. The support 20 has a receiving portion 22 for the shaft portion 11. The receiving portion 22 rotatably supports the shaft portion 11. More specifically, the polishing body 10 has a shape in which a first portion 12 and a second portion 14 each having a truncated cone shape are pasted together with their top surfaces facing each other, and the inclined surface of the first portion 12 is The inclined surface of the first polishing surface 16 and the second portion 14 is the second polishing surface 18.

  In addition, as a target blade of the polishing tool 1, not only a ceramic blade but also a metal blade can be used. The blade 100 includes a large blade portion 110 and a small blade portion 120 (see FIG. 4, FIG. 5, etc.).

As shown in the top view of FIG. 1B, the cover body 40 includes a grip portion 41 extending along a direction orthogonal to the extending direction of the guide groove 42. The extending direction of the guide groove 42 is the same as the reciprocating direction of the blade 100. When the cover body 40 including the grip portion 41 is provided, when the blade 100 is polished, the grip portion 41 is held by one hand to fix the polishing tool 1, and the blade 100 held by the other hand is ground. Since it can be inserted into the guide groove 42 of the tool 1 and reciprocated, the blade 100 can be polished in a stable state.

  Specifically, as shown in FIG. 4 and FIG. 5, when the blade 100 to be polished is inserted into the guide groove 42 and the small blade portion 120 of the blade 100 is in contact with the polishing body 10, the blade is polished. By reciprocating 100 along the guide groove 42, the small blade portion 120 of the blade 100 can be polished.

  The elastic member 50 is, for example, a coil spring and can be deformed according to the pressing force when the support body 20 is pressed by the blade 100 to be polished. Even if an excessively large pressing force is applied due to the deformation of the elastic member 50, the contraction (deformation) of the elastic member 50 reduces the force applied to the blade 100. As a result, in the polishing tool 1, damage to the blade 100 and the polishing body 10 is suppressed.

In the grinding tool 1, the guide member 60, even in the middle of the support 20 is moved by the contraction of the elastic member 50, because it suppresses the inclination of the support 20, the posture of the support 20 kept substantially constant Be done. That is, even when the position of the support 20 moves up and down due to a change in the pressing force applied during polishing, the contact state between the blade 100 to be polished and the polishing body 10 can be maintained in a stable state. Further, even if there is an inclination in how to apply the force during polishing, the inclination of the support 20 is suppressed by the engagement of the hole 70 and the guide member 60, so that the blade 100 is a polishing region. The change in the contact state between the small blade portion 120 and the polishing body 10 is small.

  As described above, the polishing tool 1 of the present disclosure does not have a motor for rotating the polishing body 10 at a high speed, a mechanism for adjusting the contact angle between the polishing body 10 and the blade 100 with high accuracy, and the like, and is relatively inexpensive. However, there is little chipping that occurs during polishing, and high sharpness can be restored.

  The polishing tool 1 may include a guide member 60 whose base 30 projects toward the support 20. The guide member 60 may be joined to the base 30 or may be integrally formed. Then, the support body 20 that does not include the guide member 60 may have the hole portion 70 that is inserted into the guide member 60. As described above, in the polishing tool 1 guided by the projecting guide member 60 and the hole 70, the length of the guide member 60 is adjusted to easily adjust the moving direction and the posture of the support body 20. can do.

  For example, when the degree of fluctuation of the pressing force of the blade 100 during polishing is relatively large, the contact state between the blade 100 and the polishing body 10 can be stably maintained by lengthening the guide member 60 and the hole 70. be able to. Not limited to the above-described configuration, the support 20 has the guide member 60 projecting toward the base 30, and the base 30 without the guide member 60 has the hole 70 to be inserted into the guide member 60. The same effect can be obtained in this case as well.

  As shown in FIGS. 4 and 5, in the blade 100 inserted in the guide groove 42, the surface of the small blade portion 120 is sandwiched between the first polishing surface 16 and the second polishing surface 18 of the polishing body 10. The first polishing surface 16 and the second polishing surface 18 are in contact with each other.

By reciprocating the blade 100 in the lengthwise direction in such a contact state, the polishing body 10 rotates about the shaft portion 11, and with this rotation, the small blade portion 120 and the first polishing surface 16 move. Polished with the second polishing surface 18. More specifically, in the polishing tool 1, when the blade 100, that is, the small blade 120 is reciprocated, the first polishing surface 16 and the second polishing surface 18 rotate about the shaft portion 11. In the polishing tool 1, the reciprocating motion of the blade 100 with respect to the first polishing surface 16 and the second polishing surface 18 (hereinafter, the first polishing surface 16 and the second polishing surface 18 may be simply referred to as a polishing surface). Not only the polishing by the rotary motion of the polishing surface accompanying the reciprocating motion also acts, and the polishing of the small blade 120 of the blade 100 proceeds. In this way, since the polishing progresses while the polishing surface rotates, the small blade 120 of the blade 100 is formed with a grinding mark extending in the direction toward the blade edge. Further, by polishing in the direction along the grinding mark, fine irregularities are formed on the cutting edge. The blade 100 also has an action of cutting an object like a saw due to these fine irregularities formed on the blade edge, so that the blade 100 polished by the polishing tool 1 regains a relatively sharp cutting edge.

Further, as shown in FIG. 3A, in the top view, the rotation direction of the polishing body 10, that is, the direction orthogonal to the axial direction of the shaft portion 11 is inclined with respect to the length direction of the guide groove 42. . As a result, both side surfaces of the small blade portion 120 of the cutting tool 100 easily come into contact with the respective polishing surfaces (the first polishing surface 16 and the second polishing surface 18) at the same time, so that both sides of the small blade portion 120 are easily contacted. The balance of the polishing state is stable. Further, due to this inclination, the contacting positions of the both side surfaces of the small blade 120 are separated from each other in the opposite directions with respect to the rotating shaft (shaft portion 11) of the polishing body 10. Accordingly, in the polishing tool 1, when the blade 100 is moved along the length direction (that is, along the length direction of the guide groove 42 in a top view), the polishing body 10 is easily rotated, and after polishing, It is possible to further stably increase the sharpness of the blade 100.

  The support body 20, the base 30, and the cover body 40 are made of, for example, ABS resin. These may be made of, for example, PP (polypropylene) or PS (polystyrene), and the material is not particularly limited.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various improvements and modifications may be made without departing from the scope of the present invention. is there.

DESCRIPTION OF SYMBOLS 1 Polishing tool 10 Polishing body 11 Shaft part 12 1st part 14 2nd part 16 1st polishing surface 18 2nd polishing surface 20 Support body 22 Receiving part 30 Base 40 Cover body 42 Guide groove 50 Elastic member 60 Guide member 70 Hole part 100 blade 110 large blade 120 small blade

Claims (3)

An abrasive body,
A support for supporting the polishing body,
A base located below the support,
An elastic member and a guide member located between the support and the base,
Each of the polishing bodies has a shape in which a truncated cone-shaped first portion and a second portion are pasted together with their top surfaces facing each other, and is connected to a shaft portion,
The support has a receiving portion of the shaft portion,
The receiving portion rotatably supports the shaft portion,
The support or the base has holes that are open on the surfaces facing each other,
The elastic member is located directly below the polishing body to support the support body, and the guide member is located around the elastic member and the polishing body so as to be engaged with the hole. It is a blade sharpener. A cover body for covering the polishing body,
The cover body has a guide groove for guiding the blade to be polished to the polishing body,
The blade polishing tool according to claim 1, wherein the guide groove has a groove width that becomes narrower as it approaches the polishing body.   The blade polishing according to claim 1 or 2, wherein the support or the base has the guide member protruding toward each of them, and the one not provided with the guide member has the hole portion. Ingredient

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