JP3007312U - Sharpener - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively prevent heat generation and clogging of the grinding stone during polishing. A grindstone 5 having grinding surfaces 6 and 7 having a frustoconical surface shape and forming an angle with each other is formed.
This grindstone 5 is rotatably provided via a rotary shaft 8. The height of the trough 12 surrounding the lower part of the grindstone 5 is made higher than the lower intersection K of the polishing surfaces 6, 7. [Effect] The liquid 23 in the trough 12 cools the grindstone 5 and cleans the polishing dust.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knife sharpener for sharpening a knife such as a knife or knife with a grindstone.

[0002]

[Prior art]

 Conventionally, as this type, Japanese Patent Laid-Open No. 62-181860 discloses a frame and a polishing surface rotatably provided on the frame and having a truncated cone surface shape and forming an angle with each other. And a guide member that steers the blade so that the blade presses against both the polishing surfaces during the sharpening process to bring the blade into contact with the polishing surface, and a gutter that is provided on the frame and surrounds the lower portion of the grinding stone. A knife sharpener equipped with and has been proposed.

[0003]

[Problems to be solved by the device]

 In the sharpener described above, by moving the tool back and forth diagonally with respect to the axial direction of the grindstone having a frusto-conical grinding surface, both grinding surfaces come into contact with the cutting tool and both side surfaces, and the cutting edge is cut as in the conventional method. It is possible to perform polishing more effectively than crushing and sharpening. By the way, even in this type of sharpener, there are problems that frictional heat is generated when sharpening with a blade, the blade becomes dull, and polishing waste of the blade gets into the eyes of the grindstone and causes clogging. Although the knife sharpener has a gutter, it has not been able to sufficiently solve the above-mentioned problems of frictional heat generation and clogging. Further, when the polishing dust causes clogging or dirt, the grindstone has been fixedly mounted on the frame in the related art, so that there is a problem that it is difficult to clean the grindstone. Furthermore, in the above-mentioned knife sharpener, the operator holds one side of the frame and presses it to sharpen the blade, but if the frame is displaced due to the resistance to move the blade back and forth, the blade will be sharpened on the polishing surface. In some cases, it may not be possible to press the side surfaces evenly, and in particular, the tool moves back and forth in an oblique direction with respect to the grindstone, so there is a problem that misalignment is likely to occur during polishing. Furthermore, this type of sharpener is used in kitchens, etc., but it was generally useless for sharpening blades, and it was convenient if it could be used for other purposes.

Therefore, the present invention aims to provide a blade sharpener capable of effectively preventing heat generation and clogging of a grindstone at the time of polishing, and also capable of easily cleaning the grindstone. The purpose of the present invention is to provide a blade sharpener that can effectively prevent heat generation and clogging of the grindstone during polishing.Furthermore, it is possible to prevent displacement of the frame during polishing and to easily clean the grindstone. An object of the present invention is to provide a blade sharpener that can effectively prevent heat generation and clogging of a grindstone during polishing.

[0005]

[Means for Solving the Problems]

 According to a first aspect of the present invention, there is provided a frame which integrally includes a grip portion and a polishing portion, a rotary shaft which is rotatably provided laterally to the polishing portion and is obliquely provided with respect to a longitudinal direction of the frame, and the rotary shaft. A grindstone with a frusto-conical surface shape that is provided in the center of the cutting surface and forms an angle with each other, and the cutting tool is steered so that the cutting tool presses against both polishing surfaces during the grinding process. In the blade sharpener provided with a guide member for contacting both the polishing surfaces with each other and a trough portion provided in the polishing portion and surrounding the lower portion of the grindstone, the height of the trough portion is set to a lower intersection point of the polishing surface. It was formed high.

According to a second aspect of the invention, in the blade sharpener according to the first aspect, small diameter portions are formed at both ends of the rotary shaft via step portions, and the small diameter portions at both ends are detachable. The polishing portion is provided with a locking bearing to be locked to, and the trough is formed between the locking bearings, and the upper end of the trough is formed close to the outer peripheral lower portion of the small diameter portion. It is a thing.

According to a third aspect of the present invention, in the blade sharpener according to the second aspect, the locking bearing has a pair of bearing arm portions that are elastically opened and closed and project from the polishing portion. A circular arc bearing is formed between the two parts so as to rotatably support the small diameter part, and locking parts projecting inward from the inner edges of the pair of bearing arms facing each other are formed on the upper part of the circular arc part. In addition, the inner edges of these locking parts are formed in an inverted V shape to provide an insertion guide part, and the distance between the lower ends of these insertion guide parts is slightly narrower than the diameter of the small diameter part. The polishing portion is provided with positioning portions that are located between the locking bearings at both ends and that sandwich the step portion of the rotating shaft from both end sides of the rotating shaft.

According to a fourth aspect of the invention, in the blade sharpener according to the third aspect, the polishing portion has a rough polishing grindstone having a rough polishing surface, and a polishing surface smoother than the rough polishing grindstone. It is provided with a lifting grindstone.

A fifth aspect of the present invention is the blade sharpener according to the fourth aspect, wherein a permanent magnet and a non-slip member are provided on the lower surface of the frame.

A sixth aspect of the present invention is the blade sharpener according to the first aspect, wherein a permanent magnet is provided on the lower surface of the frame.

[0011]

[Action]

 In the structure of claim 1, since the height of the trough is higher than the lower intersection point of the polishing surface, a part of both polishing surfaces is always in contact with the liquid in the trough over the entire length in the width direction of the cutting tool. Polishing can be performed, and the liquid can cool the grindstone and clean the polishing debris adhering to the polishing surface.

In the structure of claim 2, since the trough portion is provided between the locking bearings, the trough portion can be compactly formed, and the rotating shaft is formed with the small diameter portion. Since the upper end of the trough is close to the lower part of the outer periphery of the small diameter portion, the area of the grindstone in contact with the liquid in the trough can be increased. In addition, the rotating shaft portions, which are larger in diameter than the small diameter portions on both sides, also come into contact with the liquid, and heat can escape from there. Further, since the small diameter portion is detachable from the locking bearing, it is possible to remove the grindstone from the polishing section and clean the grindstone and the trough.

In the structure of the above-mentioned claim 3, the removed grindstone can be rotatably attached to the locking bearing by inserting the small-diameter portion from above the polishing portion between the insertion guide portions, and in this state. Positioning is performed in the axial direction by the positioning portion on the end side. When the grindstone is lifted up, the bearing arms are opened by the elastic force and the grindstone can be removed.

In the structure of claim 4, the blade can be finished in two steps by two kinds of whetstones by polishing the blade sharpened with the rough grinding stone with the finishing whetstone.

In the structure of the above claim 5, the frame is fixed on the metal base by the attraction force of the permanent magnet and the anti-slip member, and in the non-metal base, the frame is displaced by the anti-slip member. Is prevented. It is also possible to hold a piece of memo paper between the metal base and the permanent magnet.

In the structure of the sixth aspect, when not used for sharpening a blade, a memo paper can be sandwiched between a metal base or the like and a permanent magnet to be used as a memo stopper.

[0017]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 7 show a first embodiment of the present invention, in which a frame 1 made of synthetic resin is provided on a grip portion 2 which is long in the left-right direction, and provided on the end portion in the longitudinal direction of the grip portion 2. The polishing unit 3 is integrated with the polishing unit 3, and a separate lid 4 serving as a guide member is detachably provided on the polishing unit 3. A grindstone 5 made of alumina ceramics or the like is arranged in the polishing section 3, and the grindstone 5 has a shape in which the lower parts of two top-shaped grindstones are combined and integrally formed, and a pair of them is formed in the center. The truncated cone-shaped polishing surfaces 6 and 7 are abutted in a substantially V-shape at an angle to each other, and a rotary shaft 8 is integrally provided on both sides, and the rotary shaft 8 rotates on the polishing portion 3 of the frame 1. It can be installed laterally as much as possible, and its rotating shaft 8 is installed obliquely with respect to the longitudinal direction of the frame 1. Further, a small diameter portion 10 is formed on both sides of the rotary shaft 8 via a step portion 9, and a locking bearing 11 for detachably locking the small diameter portion 10 is provided in the polishing portion 3. A trough portion 12 that surrounds the lower portion of the grindstone 2 is formed between the locking bearings 11 on both sides, and the trough portion 12 is provided on the bottom plate 13 of the polishing portion 3 so as to project in a ring shape. Further, the height of the trough portion 12 is formed higher than the lower intersection K of the polishing surfaces 6 and 7, and in this example, the upper end 12A of the trough portion 12 is close to the lower outer peripheral portion 11K of the small diameter portion 10. Is formed. Further, semicircular bearing portions 14 and 14 which are positioning portions corresponding to the small diameter portions 10 and 10 are formed on the upper end 12A of the trough portion 12 so as to project therefrom. , 9 are sandwiched from both ends of the rotary shaft 8 to position the rotary shaft 8. In this example, the roughing grindstone 5 and the finishing grindstone 5A are arranged in the polishing section 3, and the polishing surfaces 6 and 7 of the finishing grindstone 5A are denser than the rough grinding grindstone 5. Other than the above, the roughing grindstone 5 and the finishing grindstone 5A have the same configuration, and the rotary shaft 8, the lock receiving portion 11, the trough portion 12 and the bearing portion 14 have the same configuration. Both have the same configuration.

The locking bearing 11 has a pair of bearing arm portions 15 and 15 that are elastically opened and closed and project from the bottom plate 13 of the polishing portion 3, and the diameter between the bearing arm portions 15 and 15 is increased. A bearing arc portion 16 for rotatably supporting the small portion 10 is formed, and an engaging portion 17, which protrudes inward from the inner edges of the pair of bearing arm portions 15, 15 facing each other, is formed on an upper portion of the bearing arc portion 16. 17 are provided, and insertion guides 18, 18 are provided in which the inner edges of the engaging parts 17, 17 are formed in an inverted V shape, and the lower ends of the insertion guides 18, 18 have the above-mentioned bearing arc portion. The insertion guide portions 18, 18 are formed to have a distance H between the lower ends of the insertion guide portions 18, which is slightly narrower than the diameter dimension of the small diameter portion 10.

The lid 4, which is a guide member, is provided with slits 20 and 20A for guiding the cutting tool 19 corresponding to the grindstones 5 and 5A, respectively, and these slits 20 and 20A are the lengths of the frame 1. It is formed so as to be orthogonal to the vertical direction, and when it is inserted into the slits 20 and 20A and the blade 19 is moved back and forth, the blade 19 is steered by the slits 20 and 20A, and the blades 19 are placed on the both polishing surfaces 6 and 7. It is configured to be pressed.

A disk-shaped permanent magnet 21 is fixedly attached to the center of the lower surface of the frame 1, and rubber sheets 22, 22 serving as anti-slip members are provided on the lower surface on one side and the other side in the longitudinal direction of the frame 1. It is fixed.

The method of using the blade sharpener will now be described. The inside of the trough 12 is filled with a liquid 23 such as water or oil, and the lid 4 is covered. The frame 1 is held by holding the grip portion 2, and if it is on a metal base, the permanent magnet 21 on the lower surface is attracted to fix the frame 1, and the rubber sheets 22 and 22 prevent the displacement. When the cutting tool 19 is inserted into the slit 20 and moved back and forth in this state, the side surface of the cutting tool 19 is pressed against both polishing surfaces 6 and 7 to contact and sharpen. At this time, the whetstone 5 rotates while coming into contact with the liquid 23 in the trough 12 as the blade 19 moves back and forth. Then, the liquid 23 absorbs the heat generated during polishing, the blunting of the blade 19 due to heat generation is prevented, and polishing debris is cleaned so that the polishing surfaces 6 and 7 are not clogged and a good polishing state is maintained. To be done. Then, after rough-finishing is performed by the rough-polishing grindstone 5, similarly, finishing is performed by the adjacent finishing grindstone 5A.

On the other hand, the grindstones 5 and 5A are removed from the locking bearings 11 and 11, and the grindstones 5 and 5A and the trough portion 12 are cleaned. After that, the grindstones 5 and 5A can be rotatably attached to the locking bearings 11 and 11 by inserting the small diameter portions 10 and 10 between the insertion guide portions 18 and 18 from above the polishing portion 3. When removing, the grindstones 5 and 5A can be removed by lifting the grindstones 5 and 5A upward to open the space between the bearing arms 15 and 15 by the elastic force.

Further, in addition to sharpening the blade 19, as shown in FIG. 7, the memo paper 25 can be used as a memo stopper by sandwiching the memo paper 25 on the metal side surface of the refrigerator 24 with the permanent magnet 21.

As described above, in this embodiment, in accordance with claim 1, the frame 1 integrally including the grip portion 2 and the polishing portion 3 and the length of the frame 1 rotatably provided laterally to the polishing portion 3 And a grindstone 5 provided with a rotary shaft 8 which is obliquely provided in the direction of the direction, and which are provided in the center of the rotary shaft 8 and have grinding surfaces 6 and 7 which have a frustoconical surface shape and form an angle with each other. During the sharpening process, the lid 19 is a guide member for steering the blade 19 so that the blade 19 presses the polishing surfaces 6 and 7, and contacts the polishing surfaces 6 and 7, and the grinding stone 5 provided on the polishing unit 3. In a blade sharpener provided with a trough portion 12 surrounding a lower portion, the height of the trough portion 12 is formed higher than the lower intersection point K of the polishing surfaces 6 and 7, and the height of the trough portion 12 is equal to the polishing surface 6. Since it is higher than the lower intersection K of 7, the part of both polishing surfaces 6 and 7 is constantly in contact with the liquid 23 in the trough 12 over the entire length in the width direction. Can perform polishing tool 19 in a state, it is possible to clean the polishing dust adhering to the cooling and polishing surfaces 6 and 7 of the grinding wheel 5 by the liquid 23.

As described above, in this embodiment, in accordance with the second aspect, the small diameter portions 10, 10 are formed at both ends of the rotary shaft 8 via the step portions 9, 9, respectively, and the small diameter portions at both ends are formed. Locking bearings 11 and 11 to which 10 and 10 are detachably locked respectively are provided in the polishing section 3, and a trough portion 12 is formed between these locking bearings 11 and 11, and the trough portion is formed. The upper end 12A of 12 is formed close to the lower peripheral portion 10A of the small diameter portion 10. Since the trough portion 12 is provided between the locking bearings 11, 11, the trough portion 12 should be formed compactly. Since the small diameter portion 10 is formed on the rotary shaft 8 and the upper end 12A of the trough portion 12 is brought close to the outer peripheral lower portion 10A of the small diameter portion 10, the grindstone 5 in contact with the liquid 23 in the trough portion 12 is formed. The area can be increased, cooling and cleaning of the grindstone 5 can be effectively performed, and the diameter of the rotary shaft 8 larger than the small diameter portions 10 and 10 on both sides is also liquid. 23 in contact, the heat can escape from here. Furthermore, since the small diameter portion 10 is detachable from the locking bearing 11, the grindstone 5 and the trough portion 12 can be cleaned by removing the grindstone 5 from the polishing section 3.

As described above, according to the third aspect of the present invention, in the locking bearing 11, the pair of bearing arms 15 and 15 that elastically open and close are provided on the polishing section 3 so as to project therefrom. A bearing arc portion 16 that rotatably supports the small diameter portion 10 is formed between the bearing arm portions 15 and 15, and a pair of bearing arm portions 15 and 15 are provided on the upper portion of the bearing arc portion 16 from opposite inner edges thereof, respectively. The engaging portions 17, 17 protruding inward are formed, and the inner edges of the engaging portions 17, 17 are formed in an inverted V shape to provide the insertion guide portions 18, 18, and the insertion guide portions 18 are provided. The gap H at the lower end of the rotary shaft 8 is formed to be slightly narrower than the diameter of the small diameter portion 10. The bearings 14 and 14 serving as positioning portions that sandwich the portions 9 and 9 from both ends of the rotary shaft 8 are provided, and the removed grindstone 5 is located above the polishing portion 3 between the insertion guide portions 18 and 18. The small part 10 is inserted and rotatably attached to the locking bearing 11. In this state, the bearing parts 14, 14 on both ends are used for axial positioning, and when the grindstone 5 is lifted up, the bearing arm part 15 , 15 is opened by the elastic force, and the grindstone 5 can be easily removed.

As described above, in this embodiment, in accordance with the fourth aspect, the polishing section 3 has the rough grinding wheel 5 having the rough polishing surfaces 6 and 7, and the polishing surface smoother than the rough polishing wheel 5. 6A and 7A for finishing stones 5A are provided, so that the blade 19 polished by the roughing grinding stone 5 is polished by the finishing stone 5A so that the blade 19 has two types of grinding stones 5, 5A. Can be finished in two steps.

As described above, according to the fifth embodiment, the permanent magnet 21 and the rubber sheets 22, 22, which are the non-slip members, are provided on the lower surface of the frame 1 according to the fifth aspect. , The frame 1 is fixed by the attraction force of the permanent magnet 21 and the rubber sheets 22 and 22. On a non-metal base, the rubber sheets 22 and 22 prevent the frame 1 from being displaced and the frame is stable. You can move the blade 19 back and forth to sharpen.

As described above, in this embodiment, the permanent magnet 21 is provided on the lower surface of the frame 1 according to the sixth aspect. Therefore, when not used for sharpening a blade, a metal base and a permanent magnet are used. It can be used as a memo pad by inserting a piece of memo paper 25 between it and 21.

FIG. 8 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. One grindstone 5 is provided, and the trough 12 surrounding the lower part of the grindstone 5 is formed such that the upper end thereof is close to the outer peripheral lower part 10A of the small diameter part 10, and the lower surface of the frame 1 has a permanent magnet 21 and rubber. The seats 22 and 22 are provided, and this example also has the same operation and effect as those of the first embodiment corresponding to the above claims 1, 2, 3, and 6.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the number of grindstones provided in the polishing section may be three.

[0032]

[Effect of device]

 According to a first aspect of the present invention, there is provided a frame which integrally includes a grip portion and a polishing portion, a rotary shaft which is rotatably provided laterally to the polishing portion and is obliquely provided with respect to a longitudinal direction of the frame, and the rotary shaft. A grindstone with a frusto-conical surface shape that is provided in the center of the cutting surface and forms an angle with each other, and the cutting tool is steered so that the cutting tool presses against both polishing surfaces during the grinding process. In the blade sharpener provided with a guide member for contacting both the polishing surfaces with each other and a trough portion provided in the polishing portion and surrounding the lower portion of the grindstone, the height of the trough portion is set to a lower intersection point of the polishing surface. It is possible to provide a sharpening tool which is formed high and which can effectively prevent heat generation and clogging of the grindstone during polishing.

According to a second aspect of the present invention, in the blade sharpener according to the first aspect, small diameter portions are formed at both ends of the rotary shaft via step portions, and the small diameter portions at both ends are detachable. The polishing portion is provided with a locking bearing to be locked to, and the trough is formed between the locking bearings, and the upper end of the trough is formed close to the outer peripheral lower portion of the small diameter portion. Therefore, it is possible to provide a blade sharpener that can easily clean the grindstone and can effectively prevent the heat generation and clogging of the grindstone during polishing.

According to a third aspect of the present invention, in the blade sharpener according to the second aspect, the locking bearing has a pair of bearing arms that are elastically opened and closed so as to project from the polishing portion. A circular arc bearing is formed between the two parts so as to rotatably support the small diameter part, and locking parts projecting inward from the inner edges of the pair of bearing arms facing each other are formed on the upper part of the circular arc part. In addition, the inner edges of these locking parts are formed in an inverted V shape to provide an insertion guide part, and the distance between the lower ends of these insertion guide parts is slightly narrower than the diameter of the small diameter part. The polishing section is provided with a positioning section that is located between the locking bearings at both ends and that sandwiches the step section of the rotary shaft from both end sides of the rotary shaft. Can be performed easily, and it is possible to effectively prevent heat generation and clogging of the grindstone during polishing. A sharpener sharpener can be provided.

According to a fourth aspect of the invention, in the blade sharpener according to the third aspect, the polishing portion has a rough grinding wheel having a rough polishing surface and a polishing surface smoother than the rough polishing wheel. (EN) A tool sharpener provided with a lifting grindstone, capable of easily cleaning the grindstone and effectively preventing heat generation and clogging of the grindstone during polishing.

According to a fifth aspect of the invention, in the blade sharpener according to the fourth aspect, a permanent magnet and a non-slip member are provided on the lower surface of the frame, which can prevent the frame from being displaced during polishing. It is possible to provide a blade sharpener that can easily clean a grindstone and can effectively prevent heat generation and clogging of the grindstone during polishing.

According to a sixth aspect of the present invention, in the blade sharpener according to the first aspect, a permanent magnet is provided on the lower surface of the frame, so that the grindstone can be easily cleaned and the grindstone at the time of polishing can be easily removed. It is possible to provide a blade sharpener that can effectively prevent heat generation and clogging, and can be used as a memo stopper by sandwiching a note paper etc. when not used as a blade sharpener.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG. 1 showing a first embodiment of the present invention.

FIG. 3 is a sectional view taken along line YY of FIG. 1 showing a first embodiment of the present invention.

FIG. 4 is a plan view showing a first embodiment of the present invention with a lid removed.

FIG. 5 is a plan view showing a first embodiment of the present invention in a state where a lid body is covered.

FIG. 6 is a side view showing a first embodiment of the present invention.

FIG. 7 is a side view showing a first embodiment of the present invention when used as a memo pad.

FIG. 8 is a plan view showing a second embodiment of the present invention with a lid removed.

[Explanation of symbols]

 1 frame 2 gripping part 3 polishing part 4 lid (guide member) 5 5A grindstone 6 7 polishing surface 8 rotating shaft 9 step part 10 small diameter part 10A outer peripheral lower part 11 locking bearing 12 trough part 12A upper end K lower intersection point 14 bearing Part (positioning part) 15 Bearing arm part 16 Bearing arc part 17 Locking part 18 Insertion guide part 19 Cutting tool 21 Permanent magnet 22 Rubber sheet (skid member) H interval

Claims (6)

[Scope of utility model registration request] 1. A frame that integrally includes a gripping portion and a polishing portion, a rotation shaft that is rotatably provided on the polishing portion and is obliquely provided with respect to a length direction of the frame, and a center of the rotation shaft. A grindstone having a grinding surface having a frusto-conical surface shape and forming an angle with each other, and the cutting tool is steered so that the cutting tool presses against the grinding surfaces during grinding. In a blade sharpener provided with a guide member to be brought into contact with a polishing surface and a trough portion provided in the polishing portion and surrounding a lower portion of the grindstone, the height of the trough portion is formed higher than a lower intersection point of the polishing surface. A sharpener sharpening tool. 2. A small-diameter portion is formed at both ends of the rotary shaft via a step portion, and locking bearings for detachably locking the small-diameter portions at both ends are provided in the polishing portion,
The blade sharpener according to claim 1, wherein the trough portion is formed between the locking bearings, and the upper end of the trough portion is formed adjacent to a lower outer peripheral portion of the small diameter portion. 3. The locking bearing comprises a pair of bearing arms that are elastically opened and closed so as to project from the polishing section, and the diametrically small portion is rotatably supported between the bearing arms. An arcuate portion is formed, and locking portions projecting inwardly from opposite inner edges of the pair of bearing arm portions are formed on the upper portion of the bearing arcuate portion, and the inner edges of these locking portions are formed in an inverted V shape. The insertion guides are formed on the upper and lower ends of the insertion guides, and the spacing between the lower ends of the insertion guides is slightly narrower than the diameter of the small diameter portion. 3. The blade sharpener according to claim 2, further comprising a positioning portion that is located between the positioning portions and sandwiches the stepped portion of the rotary shaft from both ends of the rotary shaft. 4. The roughening grindstone having a rough polishing surface, and the finishing grindstone having a smoother polishing surface than the roughing grinding stone are provided in the polishing section. Blade sharpener. 5. The blade sharpener according to claim 4, wherein a permanent magnet and a non-slip member are provided on the lower surface of the frame. 6. The blade sharpener according to claim 1, wherein a permanent magnet is provided on the lower surface of the frame.