Roll sharpener whetstone

Abstract

To provide a lightweight grindstone for a roll sharpener having a structure that can be easily manufactured. [Solution] The roll sharpener grinding wheel of the present invention comprises two curved, dome-shaped diamond grinding wheels, one on the left and one on the right, each with a polygonal cross-section hole in the center; a roughly truncated cone-shaped plastic disk, which has a polygonal cross-section hole in the center and is fitted inside the diamond grinding wheels; and a support part that is inserted into the through-holes to support the two diamond grinding wheels and two plastic disks, with the plastic disks fitted inside each of the two diamond grinding wheels and the grinding faces of the two diamond grinding wheels facing each other, and the cross-section of the support part is the same shape as the cross-section of the through-holes in the two diamond grinding wheels and the two plastic disks.

Description

[Technical Field]

[0001] This invention relates to a whetstone for a roll sharpener that can efficiently sharpen blades. [Background technology]

[0002] Chefs who handle knives need to sharpen them daily with whetstones. When sharpening knives with a whetstone, it is common to lay a towel on a counter such as a stainless steel table, place the whetstone on top of the towel, and then sharpen the knives. Roll sharpeners are available as a tool that can efficiently sharpen knives. For example, Patent Document 1 (JP 2004-351556 A) discloses a roll sharpener.

[0003] The roll sharpener disclosed in Patent Document 1 comprises a stage portion having a grinding stone with a rotating shaft shaped like a bridge, two grooves for supporting the grinding stone and a through-hole through which part of the grinding stone passes, a housing portion having a roof and walls that is detachably mounted on the stage portion and houses the grinding stone inside, and a guide groove provided on the roof of the housing portion for guiding the cutting edge of the blade to the grinding stone. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-351556 Summary of the Invention [Problem to be solved by the invention]

[0005] The use of the roll sharpener disclosed in Patent Document 1 has the advantages of being hygienic due to efficient cleaning, being compact, and being able to be attached by fitting directly to a cutting board. However, the whetstone is heavy, and there has been a demand for further weight reduction.

[0006] The present invention has been made to solve the above problems, and its object is to provide a lightweight, easily manufactured whetstone for a roll sharpener. [Means for solving the problem]

[0007] The roll sharpener grinding wheel of the present invention comprises two curved, dome-shaped diamond grinding wheels, one on the left and one on the right, each with a polygonal cross-section hole in the center; a roughly truncated cone-shaped plastic disk, which has a polygonal cross-section hole in the center and is fitted inside the diamond grinding wheels; and a support part that is inserted into the through-holes to support the two diamond grinding wheels and two plastic disks, with the plastic disks fitted inside each of the two diamond grinding wheels and the grinding faces of the two diamond grinding wheels facing each other, and the cross-section of the support part is the same shape as the cross-section of the through-holes in the two diamond grinding wheels and the two plastic disks.

[0008] In the above, it is preferable that the support portion is composed of a male support portion having an insertion rod at the center of the tip and a female support portion having an insertion hole into which the insertion rod can be inserted, and that the male support portion is fixed to the female support portion by inserting the insertion rod, with adhesive applied, into the insertion hole.

[0009] By supporting two diamond grinding wheels and two plastic discs with the support part in this way, it is possible to reduce the weight compared to conventional roll sharpener grinding wheels. Moreover, since the support part can be formed simply by applying adhesive to the insertion rod of the male support part and inserting the insertion rod into the insertion hole of the female support part, it is possible to form the support part without using ultrasonic grinding as in the conventional method. [Effects of the Invention]

[0010] The present invention provides a lightweight, easily manufactured whetstone for a roll sharpener. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an example of a roll sharpener according to the present invention. [Figure 2] 1 is a perspective view of a grinding stone for a roll sharpener according to the present invention. [Figure 3] FIG. 2 is an exploded perspective view of the grindstone for the roll sharpener of the present invention. [Figure 4] FIG. 2 is a rear view of the roll sharpener grindstone of the present invention in an assembled state. [Figure 5] FIG. 1 is a front perspective view of the roll sharpener grindstone of the present invention in an assembled state. [Figure 6] FIG. 10 is a perspective view of the shaft support portion after assembly. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] The following describes embodiments that detail the details and advantages of the present invention. Based on the disclosure, claims and drawings in the present embodiments, those skilled in the art can easily understand the technical content of the present invention and fully implement it without omission or deficiency. Those with common knowledge in the technical field can easily understand the objectives and advantages associated with the present invention.

[0013] 1 is a perspective view showing an example of a roll sharpener that uses the roll sharpener whetstone of the present invention. The roll sharpener 100 shown in Fig. 1 has a handle 11, a whetstone mounting part 13, a roll sharpener whetstone 10 attached to the top of the whetstone mounting part 13, and a whetstone head cover 12 that covers the whetstone mounting part 13 and the roll sharpener whetstone 10 from above. With the whetstone head cover 12 closed, the knife can be passed through a slit in the center of the whetstone head cover 12 and moved back and forth to sharpen the edge of the knife with the roll sharpener whetstone 10.

[0014] Figure 2 is a perspective view of the roll sharpener grinding wheel 10 of the present invention, showing the state in which the roll sharpener grinding wheel 10 has been removed from the grinding wheel mounting section 13 of Figure 1. The roll sharpener grinding wheel 10 of the present invention is composed of two curved, dome-shaped diamond grinding wheels 3, one on each side, a roughly truncated cone-shaped plastic disk 2 fitted inside the diamond grinding wheels 3, and a support section 1 (1a and 1b) that supports the two diamond grinding wheels 3 and the two plastic disks 2. As shown in Figure 2, the convex portions of the two dome-shaped diamond grinding wheels 3 face each other, forming a V-shape. By moving the cutting edge of a tool back and forth with the tool abutting against this V-shaped portion, the cutting edge of the tool is sandwiched between the two diamond grinding wheels 3 and sharpened.

[0015] Fig. 3 is a perspective view of the diamond grinding wheel before the plastic disk is fitted, Fig. 4 is a rear view of the diamond grinding wheel after the plastic disk has been fitted, and Fig. 5 is a front perspective view of the diamond grinding wheel after the plastic disk has been fitted. As shown in Fig. 3, the roll sharpener grinding wheel 10 of the present invention has a dome-shaped curved diamond grinding wheel 3, the inside of which can be fitted with a plastic disk 2 that is approximately truncated cone. By fitting the plastic disk 2 inside the diamond grinding wheel 3 in this way, the weight of the entire roll sharpener grinding wheel 10 can be reduced.

[0016] The diamond grinding wheel 3 has a through-hole 3a with a polygonal cross section formed in its center, and similarly, the plastic disk 2 has a through-hole 2a with a polygonal cross section formed in its center. While FIGS. 3 to 5 show the case where the through-holes 2a, 3a have a rectangular cross section, the cross-sectional shape is not limited to a rectangular shape and may also be a polygon. As shown in FIG. 4, when the plastic disk 2 is fitted inside the diamond grinding wheel 3, the through-holes 3a and 2a are aligned in the front-to-back direction. A bearing 1, which will be described later, is inserted into the through-holes 2a and 3a, thereby rotatably supporting and fixing the two diamond grinding wheels 3 and the plastic disks 2 fitted inside them, as shown in FIG. 2.

[0017] In the past, the plastic disk 2 was not fitted inside the diamond grinding wheel 3, but was instead made entirely of iron with the diamond grinding wheel fixed to its surface by electroplating, which made it heavy and required additional material costs. In this invention, the plastic disk 2 is fitted inside the diamond grinding wheel 3, making it lighter than when it is made of iron alone. Moreover, because the diamond grinding wheel 3 is located in the area that comes into contact with the cutting edge, there is the advantage that the grinding efficiency is not reduced.

[0018] 6 and 7 are perspective views of the pivot support unit of the roll sharpener grinding wheel of the present invention, showing the assembly process and the assembly process, respectively. As shown in FIG. 6, pivot support unit 1 is composed of a mounting portion 1d that is attached to the grinding wheel mounting portion 13, a fixing portion 1e that abuts against plastic plate 2 to fix the position of plastic plate 2, and a rectangular insertion portion 1c that is inserted into through-holes 2a and 3a of plastic plate 2 and diamond grinding wheel 3. The cross-sectional shape of rectangular insertion portion 1c is designed to match the cross-sectional shapes of through-hole 2a in plastic plate 2 and through-hole 3a in diamond grinding wheel 3. Left and right fixing portions 1e and 1e are provided at both ends of pivot support unit 1, respectively, and abut against the two plastic platens 2.

[0019] The length of the rectangular insertion portion 1c, i.e., the length between the left and right fixing portions 1e, is set to be approximately the same as the total thickness of the two plastic disks 2 and the two diamond grinding wheels 3. As a result, when the through holes 2a and 3a of the two plastic disks 2 and the two diamond grinding wheels 3 are inserted into the rectangular insertion portion 1c, the left and right fixing portions 1e come into contact with the left and right plastic disks 2, and the two plastic disks 2 and the two diamond grinding wheels 3 are firmly fixed to the support portion 1 and supported.

[0020] As shown in Figure 7, the journal portion 1 is made by fixing a male journal portion 1a and a female journal portion 1b together with an adhesive. The male journal portion 1a has an insertion rod 1f at the center of the tip of a rectangular insertion portion 1c. Meanwhile, the fixing portion 1e of the female journal portion 1b has an insertion hole 1g into which the insertion rod 1f can be inserted. Because the cross-sectional shape of the insertion rod 1f and the cross-sectional shape of the insertion hole 1g are nearly identical, by applying adhesive to the insertion rod 1f and inserting it into the insertion hole 1g, the male journal portion 1a and the female journal portion 1b are integrated to form the journal portion 1.

[0021] Conventionally, ultrasonic vibration welding was used to form the pivotal support, which required repeated practice and skilled skill, but the pivotal support 1 of this invention can be easily completed by anyone without practice, as it is simply a matter of applying adhesive to the insertion rod 1f and then fitting it into the insertion hole 1g. This allows anyone to easily assemble the roll sharpener grinding wheel 10, which reduces manufacturing costs.

[0022] For ease of explanation, in Figure 6, the two plastic disks 2 and two diamond grinding wheels 3 are shown unattached and integrated with the male support portion 1a and female support portion 1b, but normally, when integrating the male support portion 1a and female support portion 1b, the through holes 2a of the two plastic disks 2 and the through holes 3a of the two diamond grinding wheels 3 are inserted into the rectangular insertion portion 1c and fixed in place. This completes the grinding wheel for a roll sharpener shown in Figure 2.

[0023] The features and advantages of the present invention have been described in the above embodiments, but the present invention can be implemented within the scope of the principles of the present invention by expanding the terms used in the claims of the utility model registration of this application to their broader and more general meanings.

[0024] Furthermore, various modifications can be made to the size, shape, material thickness, weight, etc. of the grinding stone of the present invention, and different forms incorporating these modifications are also included within the technical scope of the present invention. [Explanation of symbols]

[0025] 100 Roll Sharpener 1 axis branch 2 Plastic Discs 3 Diamond grinding wheels 10 Roll sharpener stone 11 Handle 12 Grindstone head cover 13 Grindstone installation section 1a male shaft support 1b Female shaft support 1c Rectangular insert 1e Fixed part 1f Insertion rod 1g insertion hole

Claims

1. A polygonal cross-section hole is formed in the center, and two curved dome-shaped diamond grinding stones are placed on the left and right. a substantially truncated cone-shaped plastic disk having a through hole with a polygonal cross section formed in the center thereof and fitted inside the diamond grinding wheel; a plastic disk fitted inside each of the two diamond grinding wheels, with the grinding surfaces of the two diamond grinding wheels facing each other; and a support section that is inserted into the through-hole to support the two diamond grinding wheels and the two plastic disks, A grinding wheel for a roll sharpener, characterized in that the cross section of the support portion has the same shape as the cross sections of the through holes of the two diamond grinding wheels and the two plastic discs.

2. The roll sharpener grinding wheel of claim 1, characterized in that the support portion is composed of a male support portion having an insertion rod at the center of the tip and a female support portion having an insertion hole into which the insertion rod can be inserted, and the male support portion is fixed to the female support portion by inserting the insertion rod, with adhesive applied, into the insertion hole.

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