JP2012228748A - Electric edged tool sharpener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric edged tool sharpener that can momentarily feed sharpening water required for proper polishing to a polishing surface without causing splashes of the sharpening water fed to the polishing surface.SOLUTION: The electric edged tool sharpener 1 includes a rotary polishing member 9 having a grinding stone 8 and fixed to a rotary shaft 7 rotated by a rotation drive device so as to be integrally rotatable with the rotary shaft, and feeds the sharpening water to the polishing surface 19 of the rotating grinding stone 8 to polish an edged tool with the polishing surface 19. The electric edged tool sharpener includes a means for preliminarily imparting rotary inertia with the same rotation as the rotation of the grinding stone 8 to the sharpening water fed to the polishing surface 19.

Description

  The present invention relates to an electric knife sharpening machine that sharpens a knife such as a knife while supplying sharpening water to a polished surface.

  One type of electric knife sharpener is a sharpener that is used while grinding water on a grindstone. The reason for applying the sharpening water is to prevent the blade from damaging the grindstone so that the blade can move smoothly and to prevent the blade from burning back.

  A conventional electric knife sharpening machine that uses sharpening water has a structure for supplying the grinding stone surface so that sharpening water is applied from the outside. The grindstone of an electric blade sharpener with such a structure is rotating at high speed, so the grinding water applied to the grindstone surface during rotation will be splashed and scattered on the grindstone surface in an instant without adhering to the surface. It ends up. Therefore, such an electric knife sharpening machine cannot efficiently supply sharpening water to the grindstone surface.

  The means for supplying the polishing water to the surface of the grindstone in Patent Document 1 is such that a number of threads for supplying the grinding water are brought into contact with or separated from the surface of the grindstone from a grinding water spray pipe above the grindstone, and fall along this thread. It is a structure that supplies the grinding water to the grindstone surface. Even if a large number of yarns are brought into contact with the grindstone surface, the yarn is immediately ground by the grindstone surface, so that the yarn is finally separated from the grindstone surface. Then, the sharpening water travels along the yarn and becomes water droplets and falls on the surface of the grindstone. As a result, the dropped water droplets are blown off soon before adhering to the grindstone surface and scattered from the grindstone surface. One of the reasons that water droplets are blown off and scattered is that the water droplets do not have the inertia of high-speed rotation with respect to the surface of the grinding wheel that rotates at high speed, so that the water droplets cannot rotate at the same speed as the grinding stone. This is probably because water droplets cannot sufficiently adhere to the surface of the grindstone. Moreover, since the polishing water splashed from the surface of the grindstone scatters to the surroundings, the polishing water is applied to the user. Further, since the polishing water supplied to the surface of the grindstone is scattered in an instant, it is necessary to supply a large amount of polishing water, and the amount of the polishing water that is scattered correspondingly increases, so that the processing is troublesome.

  The means for supplying sharpening water to the surface of the grindstone in Patent Document 2 uses the water pressure of tap water to pass the sharpening water through the hollow of the rotating shaft, and to eject the grinding water onto the grindstone surface of the grindstone. Thus, the structure is intended to uniformly disperse on the grindstone surface that is the upper surface of the grindstone. Since sharpening water is spouted onto the grinding wheel surface and sprinkled on the grinding wheel surface by centrifugal force, most of the sprayed grinding water is scattered unnecessarily without spraying on the grinding wheel surface, and the remaining grinding water is scattered on the grinding wheel surface. However, since the grindstone surface rotates at high speed, the sharpening water splashes outside the grindstone surface in an instant. Also in this case, the sharpening water does not have the inertia of high-speed rotation with respect to the rotating grindstone that rotates at high speed, so the sharpening water cannot rotate at the same speed as the grindstone. It is thought that it is because it cannot adhere to. Therefore, since a considerable amount of water must be continuously supplied from the tap with a relatively large water pressure, a large amount of tap water is required and costs are high, so commercialization is poor. Moreover, since a large amount of water is scattered, the treatment is not easy. Furthermore, since this sharpening machine has a tool post surrounding the grindstone, sharpening water splashed from the grindstone surface hits this tool rest, but the tool post has a tool holding groove and holds this tool holding. The sharpening water will scatter from the groove.

Japanese Patent Publication No.46-798 Japanese Utility Model Publication No. 51-34090

  In the present invention, the polishing water supplied to the polishing surface of the rotating grinding stone is given in advance the same rotational inertia as that rotation, so that the polishing water supplied to the polishing surface is not scattered in an instant. An object of the present invention is to provide an electric knife sharpening machine capable of supplying polishing water necessary for proper polishing to a polishing surface.

  According to the first aspect of the present invention, a rotary polishing member having a polishing grindstone is fixed to a rotating shaft rotated by a rotation driving device so as to be integrally rotatable. By supplying sharpening water to the polishing surface of the rotating polishing grindstone, An electric blade sharpening machine that polishes a blade with a polishing surface, and has means for previously imparting the same rotation inertia to the polishing water supplied to the polishing surface as the rotation of the polishing wheel.

  According to a second aspect of the present invention, the polishing wheel has an inner surface, and the polishing water taken in from the inner surface is supplied to the polishing surface with the same rotational inertia as that of the polishing wheel by passing through the inside of the polishing wheel. is there.

  According to a third aspect of the present invention, a space for storing the polishing water is provided in the rotary polishing member, the rotary polishing member has an inlet for injecting the polishing water into the space, and the polishing grindstone is permeable to water. The polishing water that is formed of the material having the above and accumulated in the void by the rotation of the rotary polishing member penetrates from the inner surface of the polishing grindstone and is supplied to the polishing surface.

  According to a fourth aspect of the present invention, the polishing grindstone is formed in an annular shape, the substrate for closing the space inside the polishing grindstone from the lower side is fixed to the lower surface of the polishing grindstone, and a space for storing polishing water by the polishing grindstone and the substrate is configured. In this configuration, an inlet having an inner diameter smaller than that of the bottom of the cavity is formed at the top of the cavity.

  According to a fifth aspect of the present invention, the rotating shaft extends in a direction inclined with respect to the vertical, and the rotating polishing member is fixed to the rotating shaft so that a plane formed by the rotating polishing member is perpendicular to the rotating shaft. is there.

  A sixth aspect of the present invention is a configuration in which the void has an inner surface inclined like a conical inner surface.

  The seventh aspect is a configuration in which the polishing surface of the polishing grindstone is formed in a conical surface.

  Claim 8 is an electric knife sharpening machine whose rotating shaft extends in a direction inclined with respect to the vertical, and when the electric knife sharpening machine is placed on a horizontal plane, it is the highest among the buses of the polishing surface. It is the structure where the bus-line in position extends horizontally.

  According to the first aspect of the present invention, a rotary polishing member having a polishing grindstone is fixed to a rotating shaft rotated by a rotation driving device so as to be integrally rotatable. By supplying sharpening water to the polishing surface of the rotating polishing grindstone, An electric blade sharpening machine that polishes a blade with a polishing surface, and has means for previously imparting the same rotational inertia as the rotation of a polishing grindstone to polishing water supplied to the polishing surface. Therefore, since the polishing water supplied to the polishing surface has the same rotational inertia as that of the polishing wheel, the polishing wheel does not rotate when viewed from the polishing water, and there is no relative movement, so it is repelled from the polishing surface. Without being blown, it moves on the polishing surface toward its outer periphery by centrifugal force. As a result, almost all of the polishing water supplied to the polishing surface moves while adhering to the polishing surface, so that the polishing water necessary for proper polishing is supplied to the polishing surface. Further, since the polishing water is not blown off from the polished surface and can be used efficiently without waste, the amount of the polishing water scattered is small and the treatment is easy.

According to the second aspect of the present invention, when the polishing grindstone has an inner surface and the polishing water taken in from the inner surface passes through the inside of the polishing grindstone, the same rotation inertia as the rotation of the polishing grindstone is given to be supplied to the polishing surface The Since the inertia of the same rotation as that of the grinding stone can be obtained only by passing the grinding water through the inside of the grinding stone, a device for rotating the grinding water is not particularly required.

According to a third aspect of the present invention, a space for storing the polishing water is provided in the rotary polishing member, the rotary polishing member has an inlet for injecting the polishing water into the space, and the polishing grindstone has water permeability. The polishing water that is formed of the material that is stored in the void by the rotation of the rotary polishing member penetrates from the inner surface of the polishing grindstone and is supplied to the polishing surface. When the rotating polishing member is rotated at a high speed, centrifugal force is applied to the polishing water stored in the cavity of the rotating polishing member, and the inner surface of the cavity in contact with the polishing water rotates at a high speed. Rotates while pressed against the inner surface. Since the polishing wheel has water permeability, the polishing water that has permeated from the inner surface passes through the polishing wheel by the centrifugal force and oozes onto the polishing surface. In addition, since the polishing water is given the same inertia of rotation as the polishing wheel rotates while passing through the inside of the polishing wheel, the polishing water that has exuded on the polishing surface rotates while rotating at the same rotation as the polishing wheel. It only moves gradually on the polishing surface in the outer peripheral direction by force, and is not blown off from the polishing surface. Therefore, the polishing water stored in the void can be supplied to the polishing surface while applying the same rotational inertia as that of the grinding stone using the water permeability of the grinding stone. This eliminates the need for a special device or configuration that imparts rotational inertia to and moves the sharpening water. Furthermore, since the polishing water penetrates into the polishing stone having water permeability and exudes to the surface of the polishing surface, unlike the supply of the polishing water by a large number of thin tubes, the polishing water diffuses in the polishing wheel and the polishing water is Uniformly supplied to the polished surface.

According to a fourth aspect of the present invention, the polishing grindstone is formed in an annular shape, the substrate for closing the space inside the polishing grindstone from the lower side is fixed to the lower surface of the polishing grindstone, and a space for storing polishing water by the polishing grindstone and the substrate is configured. ing. An inlet having an inner diameter smaller than the bottom of the void is formed at the upper portion of the void. Therefore, the polishing water can be easily injected because the polishing water is simply poured out from above the inlet. Further, even when the polishing grindstone is rotating, the polishing water can be injected.

According to a fifth aspect of the present invention, the rotating shaft extends in a direction inclined with respect to the vertical, and the rotating polishing member is fixed to the rotating shaft so that a plane formed by the rotating polishing member is perpendicular to the rotating shaft. If the rotating shaft extends vertically, the polishing grindstone will be horizontal, so that an amount of sharpening water of the same level as that of the present invention stored in the space will remain on the bottom of the space on average wide and shallow. When the grinding wheel is rotated from this state, the polishing water first moves toward the inner surface of the void by centrifugal force, and then the polishing water sticks to the inner surface due to the viscosity of the polishing water, and then the polishing water sticks to the upper part along the inner surface. As a result, the polishing water is supplied from the lower part to the upper part of the polishing surface. Therefore, the polishing water collected in a shallow depth is supplied to the polishing surface after moving toward the inner surface of the void by high-speed rotation and moving upward while sticking to the inner surface. It becomes too long to start polishing work immediately. On the other hand, according to the fifth aspect, the polishing water collected in the space of the rotary polishing member is gathered in a low space from the beginning because the rotary polishing member is inclined, and the polishing water is already empty. It reaches to the upper part of the inner surface of the place. When the rotating abrasive member is rotated at a high speed in this state, the polishing water rotates while sticking to the inner surface of the cavity without the process of moving toward the inner surface of the cavity. So that the polishing operation can be started immediately.

  According to a sixth aspect of the present invention, the void has an inner surface inclined like a conical inner surface. The inclined inner surface is wider than the vertical inner surface at the same height, so that it is possible to take in enough sharpening water. Moreover, since the polishing water in the voids is stuck to the inclined inner surface of the polishing grindstone by centrifugal force, the polishing water can be supplied to the polishing surface on average.

  In the seventh aspect, the polishing surface of the polishing grindstone is formed in a conical surface. If the grinding wheel is disc-shaped and the polishing surface is the peripheral surface, the blade having a long blade span cannot be efficiently polished because the width of the polishing surface is narrow. Also, if the polishing wheel is a disk and the polishing surface is the upper surface that is the end surface, the polishing water collected inside the polishing wheel sticks to the inner peripheral surface in the circumferential direction by centrifugal force, Centrifugal force is a force directed in the radial direction from the center and not upward. Therefore, the centrifugal force cannot raise the polishing water to the polishing surface, which is the upper surface, and cannot supply the polishing water to the polishing surface. . According to the seventh aspect, since the polishing surface is an inclined surface, the width of the polishing surface is widened so that the polishing can be efficiently performed. Further, polishing water can be supplied to the polishing surface by centrifugal force.

Claim 8 is an electric knife sharpening machine whose rotating shaft extends in a direction inclined with respect to the vertical direction, and when the electric knife sharpening machine is placed on a horizontal plane, the highest position among the buses of the polishing surface The bus bar at is extended horizontally. Therefore, if the blade is positioned in the direction of the generatrix, the blade can be leveled and polished, which is convenient.

It is the perspective view seen from the front side of the present invention. It is a right view of the present invention. It is a top view of the present invention. It is AA sectional drawing in FIG. It is a perspective view of a grinding wheel. It is a center sectional view of a grinding wheel. It is a perspective view of a cover. It is a perspective view of the blade support stand attached to a cover. It is the perspective view which looked at the blade support stand from the lower side. It is a perspective view which shows the engagement structure with the cover provided in the sharpening machine main body. It is a perspective view which shows the engagement structure with the sharpening machine main body provided in the cover. It is the perspective view which showed the state which grind | polishes one surface of a blade. It is the perspective view which showed the state which grind | polishes the other surface of a blade.

  The sharpening machine 1 includes a sharpening machine main body 2, a cover 3, and a drainage container 4. As shown in FIG. 4, the sharpening machine main body 2 has a housing 5, and a motor 6 is provided in the housing 5. A rotating polishing member 9 having a polishing grindstone 8 is attached to a rotating shaft 7 of the motor 6 so as to be integrally rotatable. The housing 5 is formed to rise obliquely at a predetermined angle with respect to the bottom surface 10 thereof, and the rotary shaft 7 is also inclined at the same predetermined angle. The inclination angle with respect to the vertical line is about 35 degrees, but is not limited to this value. The housing 5 has an upper surface portion 11, and the rotary polishing member 9 rotates above the upper surface portion 11. The upper surface portion 11 prevents sharpening water from entering the housing 5. A drainage port 12 is provided in the upper surface part 11, and a drainage pipe 13 is attached to the drainage port 12, and drainage received by the upper surface part 11 is discharged to the outside of the housing 5. A drainage container 4 for collecting the discharged wastewater is detachably attached to the outer surface of the housing 5. The drainage container 4 has an opening 15 on a side surface, and a drainage pipe 13 is inserted into the opening 15. A protrusion (not shown) for holding the container is provided on the outer surface of the sharpening machine main body 2 in contact with the drainage container 4, and the drainage container 4 is provided with a hole (not shown) that engages with the protrusion. The drainage container 4 is attached to the sharpening machine main body 2 by the engagement between the protrusion and the hole. The drainage container 4 also rises from the bottom surface 16 so as to be inclined at the same angle as the housing 5. The drainage container 4 is provided with a detachable lid 17. The blade is polished by inserting the blade into the guide groove 38 of the cover 3, and the drainage container 4 is attached to the side opposite to the side where the guide groove 38 is provided. Thereby, the drainage container 4 does not interfere with the polishing operation during polishing. Reference numeral 14 denotes a part of the electric cord.

  As shown in FIGS. 5 and 6, the rotary polishing member 9 has a circular polishing grindstone 8 fixed to the surface of a circular substrate 18 with an adhesive, and its polishing surface 19 is formed in a conical surface. The substrate 18 is made of metal, and the polishing wheel 8 is made of a material having water permeability. As a material having water permeability, white alundum count 320, whose abrasive grains are alumina-based abrasive grains, is used, but other materials may be used, for example, a natural water grindstone. The grinding wheel 8 has a maximum diameter of about 135 mm and a maximum thickness of about 24 mm. Note that the method for fixing the polishing grindstone 8 is not limited to an adhesive, and other methods such as bonding with a metal fitting such as a bolt may be used.

As shown in FIG. 6, the rotary polishing member 9 has a space 20 for storing sharpening water therein. The space 20 is surrounded by an inner surface 21. The inner surface 21 is formed as an inclined surface that is inclined inward, and the void 20 forms a truncated cone shape that spreads at the bottom. A polishing water inlet 22 is formed in the upper center of the grinding wheel 8. Sharpening water is injected into the cavity 20 from the inlet 22. Since the inner surface 21 is inclined inward, the inner diameter of the injection port 22 is naturally smaller than the inner diameter of the bottom of the cavity 20. The inner diameter of the inlet 22 is about 54 mm, and the inner diameter of the bottom of the cavity 20 is about 88 mm, but is not limited to these values. In the state of FIG. 6, the inclination angle of the conical surface which is the polishing surface 19 of the polishing wheel 8, that is, the inclination angle of the polishing surface 19 with respect to the substrate 18 which is the horizontal surface of the rotating polishing member 9 is about 35 degrees. Further, as shown in FIG. 4, the housing 5 stands up in an oblique direction about 35 degrees with respect to the vertical line, so that the inclination angle of the rotating shaft 7 extending obliquely at the same angle as the housing 5 is also about 35 degrees. . As a result, the bus bar 23 at the highest position of the polishing surface 19 is horizontal. If the blade is polished in the vicinity of the bus bar 23, it is possible to polish the blade while keeping the entire blade horizontal, so that the operation is easy.

The sharpening machine 1 includes means for preventing the polishing water splashing from the polishing surface 19 from splashing outside. One of the means is an upper peripheral wall 25 extending circumferentially on the upper surface portion 11 of the housing 5. The upper peripheral wall 25 prevents sharpening water mainly scattered in the horizontal direction from being scattered outside. Another means is the cover 3. The cover 3 prevents sharpening water that mainly scatters upward and horizontally from splashing outside.

The cover 3 can be detachably attached to the upper peripheral wall 25 of the housing 5. The cover 3 is attached to the housing 5 by fitting the peripheral wall 26 of the cover 3 to the outside of the upper peripheral wall 25. Means for preventing the cover 3 from being detached from the housing 5 is provided in the cover 3 and the housing 5. As shown in FIG. 11, an engagement protrusion 27 for preventing separation is provided on the inner surface of the peripheral wall 26 of the cover 3. The engaging protrusion 27 is provided with a locking groove 28. Further, as shown in FIG. 10, a recess 29 for preventing detachment is provided on the surface of the upper peripheral wall 25 extending circumferentially on the upper surface portion 11 of the housing 5. The concave portion 29 has an introduction port 30 for introducing the engaging convex portion 27 of the cover 3 and an engaging concave portion 31 for engaging the engaging convex portion 27. The engaging recess 31 is provided with a locking projection 32. Reference numeral 33 denotes a safety switch that can be moved in and out, and when it protrudes as shown in FIG. 10, the motor 6 does not rotate even if the drive switch 34 is pressed. When the cover 3 is attached to the housing 5, the engaging convex portion 27 of the cover 3 is introduced into the concave portion 29 from the introduction port 30 of the housing 5, and then the cover 3 is rotated in the direction of the engaging concave portion 31. When fully rotated, if the safety switch 33 is immersed and the drive switch 34 is pressed, the motor 6 rotates. Further, the locking protrusion 32 of the housing 5 is locked in the locking groove 28 of the cover 3, thereby preventing the cover 3 from easily rotating backward. Note that reference numeral 35 in FIG. 10 and reference numeral 36 in FIG. 11 are alignment protrusions, and when the alignment protrusions 35 and 36 completely overlap, the engagement protrusion 32 of the housing 5 is inserted into the engagement groove 28 of the cover 3. Can be confirmed. This engagement structure is also provided in the outer peripheral portion on the opposite side, but the safety switch 33 and the alignment protrusions 35 and 36 are not provided.

A part of the outer periphery of the cover 3 is formed on the conical surface 37. The inclination angle of the conical surface 37 is substantially equal to the inclination angle of the polishing surface 19 of the polishing wheel 8. A guide groove 38 is formed on the conical surface 37. The guide groove 38 is constituted by guide groove inner surfaces 40 and 41 which are one surface in the groove and an upper surface portion 42 which is the other surface. One guide groove inner surface 41 of the guide groove inner surfaces 40 and 41 formed at both ends of the guide groove 38 is constituted by the upper peripheral wall 25 of the housing 5. Since the polishing surface 19 of the polishing grindstone 8 is viewed from the guide groove 38, the blade can be polished by inserting the blade from the blade insertion port 39 of the guide groove 38. The vertical width of the insertion slot 39 is about 7 mm, which is a size that a finger cannot enter. As shown in FIG. 3, since the guide groove 38 extends in the generatrix direction of the conical surface 37 of the cover 3, the knife 52 is moved while moving the knife 51 along the generatrix direction as shown in FIG. To polish. By making the entire cover 3 or the upper surface portion 42 of the guide groove 38 transparent, the polishing state can be visually observed.

A blade support base 43 is detachably attached to a conical surface 37 adjacent to the blade insertion slot 39. As shown in FIG. 8, the blade support base 43 has a blade support surface 44 having a predetermined inclination angle. As shown in FIG. 9, the blade support base 43 has a substantially semicircular fitting portion 45. As shown in FIG. 7, a blade support base receiver 46 for attaching the blade support base 43 to the conical surface 37 of the cover 3 is formed. The blade support base 46 is formed with a substantially semicircular recess 47, and the blade support base 43 is attached to the cover 3 by fitting the fitting portion 45 of the blade support base 43 into the recess 47. be able to. When the blade support base 43 is attached to the cover 3, the downward extending line of the inclined blade support surface 44 extends to the blade insertion opening 39 of the guide groove 38. When the blade is inserted into the guide groove 38 from the blade insertion port 39 while the blade is directed to the surface of the blade support surface 44, the blade is addressed to the polishing surface 19 at the same polishing angle as the inclination angle of the blade support surface 44. Polished. The angle of inclination of the blade support surface 44 with respect to the polishing surface 19 is about 16 degrees and the polishing angle is also about 16 degrees. This angle is preferable for a thin blade knife used for cooking at home, for example. Since the thin blade knife grinds both sides of the blade, when both surfaces are ground at a polishing angle of 16 degrees, the cutting edge angle, which is the angle of the cross section of the blade edge of the knife, is 32 degrees. By exchanging the plurality of blade support bases 43 having different inclination angles of the blade support surface 44 in accordance with the blades, preferable polishing can be obtained. For example, if a blade support surface 44 having an inclination angle of 22 degrees is prepared, a preferable polishing angle of the cutter blade can be obtained. Since the leading knife only grinds one side of the blade, if the grinding angle is 22 degrees, the cutting edge angle is 22 degrees. It goes without saying that the inclination angle of the blade support surface 44 is not limited to these numerical values, and an optimum cutting blade angle corresponding to the application can be obtained by setting other values. Also, by first polishing the blade with a relatively small sharp angle, and then exchanging the blade support 43 and polishing with a relatively large sharp angle, the cutting edge angle near the edge of the blade is changed and double-staged. Blade attachment is possible.

In the center of the cover 3, an injection hole 48 for injecting polishing water into the space 20 of the rotary polishing member 9 is provided. The injection hole 48 is provided with a wheel-like rib 49. This is to prevent the sharpening water from splashing from the injection hole 48 during polishing. As shown in FIG. 4, the polishing water injected from the injection hole 48 is injected into the cavity 20 through the injection port 22 of the rotary polishing member 9. The cover 3 is provided with an inner wall 50 inside the peripheral wall 26. This is because the cover 3 can be removed after use and easily washed away if the scouring water that is scattered is attached to the inner wall 50.

The sharpening water collected in the space 20 of the rotary polishing member 9 gathers in a low place of the space 20 because the rotary polishing member 9 is inclined. When the rotary polishing member 9 is rotated at a high speed in this state, centrifugal force is applied to the polishing water, and the inner surface 21 of the cavity 20 in contact with the polishing water is rotating at a high speed, so that the polishing water is stuck to the inner surface 21. Rotate with. Since the polishing wheel 8 has water permeability, the polishing water that has permeated from the inner surface 21 passes through the polishing wheel 8 by the centrifugal force and exudes to the polishing surface 19. Since the polishing water is given the same rotational inertia as the rotation of the polishing grindstone 8 while passing through the inside of the polishing grindstone 8, the polishing water that has oozed out on the polishing surface 19 rotates while rotating at the same rotation as the polishing grindstone 8. Then, it gradually moves in the outer peripheral direction of the polishing surface 19 by centrifugal force. However, even if the sharpening water moves in the outer circumferential direction, the edge of the blade comes into contact immediately, so the amount of movement of the sharpening water in the outer circumferential direction is small. Therefore, the polishing water hardly scatters from the outer periphery of the polishing surface, and the polishing water necessary for polishing is efficiently supplied.

Next, an example of the usage method of the present invention will be described with reference to FIGS. These drawings show a method for polishing a thin knife for cooking. Thin blade knives need to be sharpened on both sides of the blade. FIG. 12 shows a case where one surface of the blade is polished. When the sharpening machine 1 is used, the sharpening machine 1 is placed so that the blade insertion opening 39 of the guide groove 38 faces the operator. Next, polishing water is injected into the injection hole 48 of the cover 3 and an appropriate amount is stored in the space 20 of the rotary polishing member 9. Next, the handle 55 of the knife 51 is grasped with the right hand, and the drive switch 34 is pressed to turn it on. The polishing grindstone 8 rotates at about 500 revolutions per minute, but is not limited to the number of revolutions. Further, the rotational speed may be variable. As the polishing grindstone 8 rotates, the polishing water exudes to the polishing surface 9 so that the blade base 53 of the blade 52 is inserted into the guide groove 38 from the blade edge 54. At that time, the blade 52 is directed to the blade support surface 44 of the blade support base 43 to determine the polishing angle, and the surface of the blade edge 54 is polished by the polishing surface 9 while pulling the knife 51 in the direction of the arrow. The knife is stabilized when the left hand that is open when polishing is attached to the blade 52. If the knife 51 is polished while being pulled slowly, the blade can be brought into a good state only by pulling the knife once. Of course, the knife 51 may be polished for several reciprocations. When the polishing of one surface of the blade 52 is finished, the knife 51 is moved to the left hand as shown in FIG. 13 and the other surface of the blade 52 is pulled while pulling the knife 51 in the direction of the arrow in the same manner as described above. To polish. At that time, the drive switch 34 may remain on and may be changed. Alternatively, the drive switch 34 may be turned off once and then turned on again.

In the method of using the sharpening machine 1 described above, the blade insertion opening 39 faces the operator as shown in FIG. As is clear from FIG. 2, in the sharpening machine 1 placed, the blade insertion port 39 and the blade support base 43 are provided in the highest region, and the upper surface 56 of the cover 3 is inclined downwardly from there. The left outer peripheral surface 57 of the housing 5 is inclined downward to the left. Since the knife 51 is kept horizontal when the knife 51 is polished, as shown in FIG. 12, when holding the knife 51 in the right hand and polishing, the knife 55 between the handle 55 of the horizontal knife 51 and the upper surface 55 of the cover 3 Since a triangular space is formed as seen in FIG. 2, the right hand holding the knife 51 during polishing is not interfered with the upper surface 56 of the cover 3 and is easy to use. At this time, in order to stabilize the knife 51, it is preferable to attach a left hand to the blade 52, but the attached left hand is not interfered with the outer peripheral surface 57 on the left side of the housing 5. Further, when the knife 51 is held with the left hand as shown in FIG. 13, a triangular space is formed between the handle 55 of the horizontal knife 51 and the outer peripheral surface 57 on the left side of the housing 5 as shown in FIG. Therefore, the left hand holding the knife 51 during polishing is not interfered with the outer peripheral surface 57 on the left side of the housing 5 and is easy to use. At this time, it is preferable to attach a right hand to the blade 52 in order to stabilize the knife 51, but the attached right hand is not interfered with the upper surface 56 of the cover 3. That is, even if the knife 51 is held with either the left or right hand, the housing 5 and the cover 3 do not interfere with the hand or the handle 55, so that the polishing operation can be performed smoothly.

  In addition, this invention can take a various aspect based on the structure mentioned above. For example, the blade to be polished is not limited to the blade of a kitchen knife, and may be, for example, a blade of a scissors, a knife, or a carving sword. When a blade different from the knife is to be polished, a corresponding blade support base 43 is prepared. Further, when the length of the edge of the blade is shorter than the polishing surface like a sword, it can be polished while the sword is fixed during polishing.

The grinding water supplied to the polishing surface of the rotating grinding stone can be supplied to the grinding surface of the grinding wheel by giving the same rotational inertia as the rotation in advance. Applicable to electric knife sharpeners.

  DESCRIPTION OF SYMBOLS 1 Sharpening machine, 2 Sharpening machine main body, 3 Cover, 4 Drainage container, 5 Housing, 6 Motor, 7 Rotating shaft, 8 Grinding grindstone, 9 Rotating grinding member, 10 Bottom surface of housing, 11 Upper surface part of housing, 12 Drainage port, 13 drainage pipe, 14 part of electric cord, 15 opening, 16 bottom surface of drainage container, 17 lid, 18 substrate, 19 polishing surface, 20 void, 21 inner surface, 22 inlet, 23 busbar, 24 holes, 25 upper peripheral wall , 26 peripheral wall, 27 engaging projection, 28 locking groove, 29 recess, 30 inlet, 31 engaging recess, 32 locking projection, 33 safety switch, 34 drive switch, 35 alignment projection, 36 positioning projection, 37 conical surfaces, 38 guide grooves, 39 Blade insertion slot, 40 Guide groove inner surface, 41 Guide groove inner surface, 42 Guide groove upper surface portion, 43 Blade support base, 44 Blade support surface, 45 Fitting portion, 46 Blade support base receiver, 47 Recessed portion, 48 Injection hole , 49 rib, 50 inner wall of the cover, 51 knife, 52 knife blade, 53 blade base, 54 blade edge, 55 knife handle, 56 cover upper surface, 57 outer peripheral surface on the left side of the housing

Claims (8)

A rotary polishing member having a polishing grindstone is fixed to a rotating shaft rotated by a rotation driving device so as to be integrally rotatable. By supplying sharpening water to the polishing surface of the rotating polishing grindstone, the cutting tool is moved on the polishing surface. An electric knife sharpening machine for polishing, comprising means for previously imparting the same rotational inertia as the rotation of a polishing grindstone to polishing water supplied to a polishing surface. 2. The electric cutter according to claim 1, wherein the polishing wheel has an inner surface, and the polishing water taken in from the inner surface is supplied to the polishing surface with the same rotation inertia as that of the polishing wheel by passing through the inside of the polishing wheel. Sharpening machine. A space for storing the polishing water is provided in the rotary polishing member, the rotary polishing member has an inlet for injecting the polishing water into the space, and the polishing stone is formed of a material having water permeability. The electric blade sharpening machine according to claim 2, wherein the polishing water accumulated in the void by rotation of the rotary polishing member penetrates from the inner surface of the polishing grindstone and exudes to the polishing surface. The grinding wheel is formed in an annular shape, the substrate that closes the space inside the grinding wheel from below is fixed to the lower surface of the grinding wheel, and a space for storing the grinding water is constituted by the grinding wheel and the substrate, and the upper part of the space The electric blade sharpening machine according to claim 2 or 3, wherein an injection port having an inner diameter smaller than the bottom of the void is formed. The electric cutter according to claim 4, wherein the rotary shaft extends in a direction inclined with respect to the vertical, and the rotary polishing member is fixed to the rotary shaft so that a plane formed by the rotary polishing member is perpendicular to the rotary shaft. Sharpening machine. 6. The electric blade sharpener according to claim 4 or 5, wherein the void has an inner surface inclined like a conical inner surface. The electric blade sharpener according to any one of claims 4 to 6, wherein a polishing surface of the polishing grindstone is formed in a conical surface. An electric blade sharpening machine whose rotating shaft extends in a direction inclined with respect to the vertical direction, and when the electric blade sharpening machine is placed on a horizontal plane, the bus bar at the highest position among the bus bars of the polishing surface is The electric knife sharpening machine according to claim 7 extending horizontally.

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