Grater

Abstract

To provide a very practical grater which is not available in the past.SOLUTION: The grating projections (2) are arranged so that a line connecting the 2a parts of the upper apexes of adjacent grating projections (2) forms a spiral curve (X) composed of a continuous curve from the central part to the outer peripheral part of the base plate (1) when viewed from the plane direction, and the grating projections (2) arranged in a spiral shape are arranged at equal intervals so that the intervals between the 2a parts of the upper apexes are equal pitches.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grater. [Background technology]

[0002] The present applicant has proposed a grater (hereinafter referred to as the prior art example) disclosed in Japanese Patent Application No. 2023-53167 as a tool for grating food such as radish or carrot.

[0003] In this conventional example, a large number of pyramidal shaped grater protrusions are formed on the surface of a metal substrate by cold forging. Compared to the conical shaped grater protrusions that had been manufactured by press working up until then, the grater protrusions can be made to protrude higher, and the ridges of the pyramidal shape can be formed at acute angles, allowing for good grating of the object to be grated. Furthermore, the raised peripheral walls that make up the grater protrusions have a dense structure due to being formed by forging, giving them excellent strength (durability). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Application No. 2023-53167 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors have further developed the above-mentioned grater, and as a result have developed a very practical grater that has never existed before. [Means for solving the problem]

[0006] The gist of the present invention will be explained with reference to the accompanying drawings.

[0007] On the surface of substrate 1 The pyramid shape has three ridges 2c extending obliquely from the upper vertex 2a, each of which has a lower vertex 2b at its lower end.The grater is provided with a large number of grating projections 2, and the grating projections 2 are arranged so that, when viewed from the plane, a line connecting the upper vertices 2a of adjacent grating projections 2 forms a spiral curve X that is a continuous curve extending from the center of the substrate 1 to the outer periphery. At the same time, one of the lower vertices 2b is arranged in a state that matches the spiral direction of the spiral curve X. Furthermore, the grating projections arranged in a spiral shape Before Oki 2 The distance between the vertices 2a teeth, Equally spaced to achieve the same pitch in The present invention relates to a grater characterized by being installed in a kitchen.

[0008] Furthermore, in the grater described in claim 1, the grating protrusions 2 are arranged so that they overlap each other when viewed from the plate surface direction of the base plate 1.

[0009] The present invention also relates to a grater as set forth in any one of claims 1 and 2, wherein the spiral curve X is an Archimedes spiral or a parabolic spiral. [Effects of the Invention]

[0010] Since the present invention is configured as described above, it is an unprecedented and very practical grater that can grate objects well. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing the present embodiment. [Figure 2] FIG. 2 is an enlarged plan view of the main part of the present embodiment. [Figure 3] FIG. 2 is an explanatory diagram of the main part of the present embodiment. [Figure 4] FIG. 2 is an explanatory diagram of the main part of the present embodiment. [Figure 5] FIG. 2 is a side view of the main part of the present embodiment. [Figure 6] FIG. 10 is an explanatory diagram of a conventional example in use. DETAILED DESCRIPTION OF THE INVENTION

[0012] A preferred embodiment of the present invention will be briefly described below, illustrating the operation of the present invention with reference to the drawings.

[0013] For example, when an object to be grated, such as a radish or a carrot, is pressed against the substrate 1 and moved in the direction of the surface of the substrate 1, the pyramidal shaped grating protrusions 2 (ridges) come into contact with the object, causing a grating action and producing grated food.

[0014] In the present invention, the grating protrusions 2 are arranged so that, when viewed from a planar direction, the line connecting the upper vertices 2a of adjacent grating protrusions 2 forms a spiral curve X consisting of a continuous curve extending from the center of the base 1 to the outer periphery, and furthermore, the grating protrusions 2 arranged in this spiral are arranged at equal intervals so that the intervals between the upper vertices 2a are the same pitch.With this configuration, the ridges of the pyramidal grating protrusions 2 mentioned above face in various different directions, so that even if the user moves the grated item in any direction, a good grating action can be obtained accordingly. [Example]

[0015] Specific embodiments of the present invention will be described with reference to the drawings.

[0016] This embodiment is a grater having a large number of pyramidal shaped grating protrusions 2 provided on the surface of a substrate 1. The pyramidal shaped grating protrusions 2 according to this embodiment have a plurality of rising peripheral walls 2A exposed on the surface side of the substrate 1, and the pyramidal shape referred to in this document also includes a shape that is roughly similar to a pyramid, such as when the upper vertex 2a is a convex curved surface or the ridge line 2c (rising side) is a slightly rounded shape, as will be described later.

[0017] 1 to 4, the base plate 1 according to this embodiment is a rectangular plate-like body made of an appropriate metal member (stainless steel), and the surface (top surface) of this base plate 1 is configured as a grater, and a handle portion 1a is provided at the base end of the base plate 1 so as to protrude rearward, and furthermore, rising wall portions 1b are provided on the left and right sides of the base plate 1 so as to slope upward outward. The base plate 1 may be made of synthetic resin, ceramic, or wood, but will be made of metal if the grater projection 2 is to be formed by forging as described below.

[0018] Furthermore, numerous grating projections 2 are provided on the flat front surface (upper surface) of the base plate 1, and recesses are provided on the flat rear surface (lower surface) by forging, as will be described later.

[0019] 4, the grater projection 2 is a triangular pyramid shape having one upper vertex 2a and a lower vertex 2b at the lower end of three ridges 2c extending obliquely from the upper vertex 2a. More specifically, the triangular pyramid shape is composed of three rising peripheral walls 2A, four vertices (one upper vertex 2a and three lower vertices 2b), and six sides (three rising inclined sides as ridges 2c and three horizontal bases). In this embodiment, the grater projection 2 is a regular tetrahedron whose four faces (including the base) are all congruent equilateral triangles. Note that the grater projection 2 may also be a regular triangular pyramid whose base is an equilateral triangle and whose three side faces are congruent isosceles triangles. The grater projection 2 may also be a square pyramid or a pentagonal pyramid.

[0020] Furthermore, in this embodiment, as in the above-mentioned conventional example (Patent Application No. 2023-53167), the height of the grating protrusion 2 is set to be the same as or approximately the same as the thickness dimension of the base plate 1, and further, the thickness dimension of the three rising peripheral walls 2A that make up the grating protrusion 2 is set to 50 to 60% of the thickness dimension of the base plate 1, and further, the rising inclination angle of the outer surfaces of the rising peripheral walls 2A of the grating protrusion 2 relative to the surface of the base plate 1 is set to be 63 to 65 degrees (the sum of the inclination angles of the outer surfaces of the two rising peripheral walls 2A relative to the perpendicular line passing through the axis of the upper vertex portion 2a is 50 to 54 degrees), and these values ​​are optimal values ​​found by grating various objects (vegetables such as radishes and carrots).

[0021] More desirable values ​​are that the thickness dimension of the three rising peripheral walls 2A that make up the grating protrusion 2 is 55% of the thickness dimension of the base 1, and the angle of inclination of the outer surfaces of the rising peripheral walls 2A of the grating protrusion 2 relative to the surface of the base 1 is 64 degrees (the sum of the angles of inclination of the outer surfaces of the two rising peripheral walls 2A relative to the perpendicular line passing through the axis of the upper vertex 2a is 52 degrees), and this grating protrusion 2 has high performance as a grater (the ability to perform good grating action) and excellent strength (durability).

[0022] The upper vertex 2a (tip) of the grating projection 2 is formed in a convex curved surface shape (a radius of R of 0.2 to 0.4 mm is suitable, with an optimum value of R of 0.3 mm).

[0023] Therefore, by setting the shape of this grating protrusion 2, it has a moderately sharp shape that allows it to perform a grating function, and furthermore, because of its convex curved surface shape, it is possible to prevent as much as possible the risk of cutting fingertips (fingers or nails).

[0024] Furthermore, as shown in Figures 3 and 4, the triangular pyramidal shaped grater protrusions 2 are arranged so that when viewed from a planar direction, the line connecting the upper vertices 2a of adjacent grater protrusions 2 forms a spiral curve X (imaginary line) consisting of a continuous curve extending from the center of the substrate 1 to the outer periphery, and further, the grater protrusions 2 arranged in this spiral shape are arranged at equal intervals so that the intervals between the upper vertices 2a are the same pitch.

[0025] Specifically, in this embodiment, a large number of grating protrusions 2 are arranged side by side in a spiral shape with one or more turns (actually, five or more turns) at the same pitch (circular pitch) of the arc so that the spiral curve X described above becomes an Archimedes' spiral (a spiral in which the lines arranged side by side with a gap in the radial direction are spaced apart at equal intervals), and further, each of the grating protrusions 2 arranged in this spiral shape is arranged so that one lower vertex 2b (and one ridge portion 2c) coincides with (is facing) the spiral direction of the spiral curve X (clockwise direction from the center toward the periphery) when viewed from a planar direction.

[0026] Therefore, when the object to be grated is grated while rotating (in a circular motion) on the surface of the substrate 1, rotating the object counterclockwise produces a grating action accompanied by incisions from the lower vertex 2b and ridge 2c that match the spiral curve X, while rotating the object clockwise produces a different grating action, and the subtle differences in the way the object is grated change the taste of the grated object. For example, if the object to be grated is wasabi, the flavor and intensity of its spiciness can be changed (the way the object is grated affects the taste).

[0027] Furthermore, each of the grating projections 2 arranged in a spiral shape may be arranged such that, when viewed from a planar direction, one lower vertex 2b (and one ridge portion 2c) faces in the opposite direction that does not match the spiral direction of the spiral curve X (clockwise direction from the center to the periphery), or the spiral direction of the spiral curve X may be counterclockwise from the center to the periphery, or the spiral curve X may be a parabolic spiral.Furthermore, in all or part of a projection row group in which a large number of grating projections 2 are arranged in a spiral shape, there may be provided an area in which the orientations of adjacent grating projections 2 (the orientation when one lower vertex 2b (and one ridge portion 2c) is aligned with the spiral direction of the spiral curve X when viewed from a planar direction) are arranged in alternately opposite directions.

[0028] In this embodiment, as shown in FIG. 5, the grating projections 2 are arranged so as to overlap each other when viewed from the plate surface direction of the substrate 1.

[0029] Specifically, the overlapping of the grater protrusions 2 can be achieved by arranging the grater protrusions 2 in a spiral shape, but furthermore, in this embodiment, the shortest distance between adjacent grater protrusions 2 is set to less than the distance of one grater protrusion 2 (the distance between the bisectors of the corners of the base of an equilateral triangle), thereby achieving the above-mentioned overlapping within a small area.

[0030] For example, as shown in Figure 6, when the grating protrusions 22 are arranged in a grid pattern on the surface of the base plate 21 when viewed from a planar direction, if the grating protrusions 22 do not overlap when viewed from the plate surface direction of the base plate 21 and a groove-like portion S is created, sufficient grating action will not be achieved when the grated object P is moved back and forth.

[0031] In this respect, in this embodiment, the grating projections 2 are arranged so as to overlap each other, so that no matter which direction the user moves them in, a good grating action can be obtained.

[0032] The symbol 2' denotes a grater protrusion that is provided in the center of the substrate 1, and although its upper vertex 2a' is located on the spiral curve X, the spacing between it and other grater protrusions 2 is not the same pitch, and it does not correspond to the grater protrusions 2 arranged in a spiral shape that perform the function of this embodiment described above. This grater protrusion 2' may be provided at any position other than the center of the substrate 1, as appropriate.

[0033] A method for manufacturing the grater according to this embodiment having the above-described structure will now be described.

[0034] Specifically, an upper mold having countless triangular pyramidal convex portions and a lower mold having countless triangular pyramidal concave portions opposed to the convex portions of the upper mold are prepared, and the substrate 1 is clamped between the upper and lower molds with the apexes of the convex portions and the concave portions positioned on the same axis, and triangular pyramidal grater protrusions 2 are forged on the front surface of the substrate 1 and triangular pyramidal concave portions (spaces) on the back surface.

[0035] The convex portion provided on the upper die and the concave portion provided on the lower die are arranged in the design stage so that the forged grater protrusions 2, when viewed from above the base plate 1, form a spiral curve X connecting the upper vertices 2a of adjacent grater protrusions 2, each of which is a continuous curve extending from the center of the base plate 1 to the outer periphery of the base plate 1. Furthermore, the grater protrusions 2 arranged in this spiral pattern are arranged at equal intervals so that the intervals between the upper vertices 2a are equal. In other words, the positions of the grater protrusions 2 are designed on the drawing in the design stage so that a spiral line is drawn on the surface of the base plate 1. The forging of the triangular pyramidal shaped grater protrusions 2 and the triangular pyramidal shaped concave portion may be performed either before or after the handle portion 1a and the rising wall portion 1b are formed from the material.

[0036] When forging this grater protrusion 2, the forging pressure in the forging device that arranges the upper and lower dies is appropriately set to a value that matches the material of the base plate 1, and the thickness dimension of the three raised peripheral walls 2A that make up the grater protrusion 2 is 50 to 60% (0.5 to 0.6 mm) of the thickness dimension of the base plate 1 (1.0 mm), and further, the forging is performed so that the rising inclination angle of each face of the grater protrusion 2 relative to the surface of the base plate 1 is 63 to 65 degrees (the sum of the inclination angles of the outer surfaces of the two raised peripheral walls 2A relative to the perpendicular line passing through the axis of the upper vertex 2b is 50 to 54 degrees).

[0037] The convex portion of the upper die and the concave portion of the lower die are configured so that the grater projection 2 has this shape.

[0038] In this embodiment, as mentioned above, the thickness dimension of the three rising peripheral walls 2A that make up the grating protrusion 2 is 55% of the thickness dimension of the base 1, and the inclination angle of the outer surfaces of the rising peripheral walls 2A of the grating protrusion 2 relative to the surface of the base 1 is 64 degrees (the sum of the inclination angles of the outer surfaces of the two rising peripheral walls 2A relative to the perpendicular line passing through the axis of the upper vertex is 52 degrees).The grating protrusion 2 configured with these values ​​has the height (approximately 1.0 mm) required for good grating action, and the sharp angle of the ridge line (edge) is also sufficiently large.

[0039] In this embodiment, cold forging is used as the forging method.

[0040] This cold forging method is extremely useful as a method for manufacturing graters having the grating protrusions 2 and recesses 3 of the above-mentioned shape, as it has good material utilization efficiency, is highly precise and strong, and is suitable for mass production.

[0041] In addition, in this embodiment, when the substrate 1 is clamped between the upper and lower molds, the lower surface of the substrate 1 that enters the recess in the lower mold is clamped in a state where it does not abut against the bottom of the recess (a state where a space is formed), so that the upper vertex of the grater protrusion 2 is formed in a convex curved surface shape.

[0042] Since this embodiment is configured as described above, when the object to be grated, such as radish or carrot, is pressed against the substrate 1 and moved in the direction of the surface of the substrate 1, the triangular pyramidal shaped grating protrusion 2 (ridge portion 2c) comes into contact with the object, causing a grating action and producing the grated object.

[0043] In this embodiment, the grating protrusions 2 are arranged so that when viewed from a planar direction, the line connecting the upper vertices 2a of adjacent grating protrusions 2 forms a spiral curve X consisting of a continuous curve extending from the center of the base 1 to the outer periphery.Furthermore, the grating protrusions 2 arranged in this spiral shape are arranged at equal intervals so that the intervals between the upper vertices 2a are the same pitch.As a result of this configuration, the ridges of the pyramidal grating protrusions 2 mentioned above face in various different directions, so that even if the user moves the grated item in any direction, a good grating action can be obtained accordingly.

[0044] Furthermore, in this embodiment, the grater projections 2 are arranged so as to overlap each other when viewed from the surface direction of the base plate 1, so that the above-mentioned effects can be reliably achieved.

[0045] In addition, in this embodiment, the grating protrusion 2 is a triangular pyramid shape having a lower vertex 2b at the lower end of three ridges 2c obliquely extending from an upper vertex 2a, and the grating protrusion 2 is arranged so that one of the lower vertices 2b coincides with the spiral direction of the spiral curve X when viewed from a planar direction. Therefore, when the grated food is grated while being rotated (in a circular motion) on the surface of the substrate 1, the taste of the grated food can be changed depending on the direction in which the grated food is rotated.

[0046] Furthermore, in this embodiment, the spiral curve X is an Archimedes spiral or a parabolic spiral, so that the above-mentioned effects are reliably achieved.

[0047] Furthermore, in this embodiment, the grating protrusion 2 is formed by forging, and compared to when formed by press processing, the grating protrusion 2 can be made to protrude higher by stretching the base plate 1 with strong pressure, and the ridge portion 2c of the triangular pyramid shape can be formed into an acute angle, so that the object to be grated can be grated well, and furthermore, the three raised peripheral walls 2A that make up the grating protrusion 2 have a dense structure due to being formed by forging, and therefore have excellent strength (durability).

[0048] In addition, in this embodiment, when forging the grating protrusion 2, the thickness dimension of the three raised peripheral walls 2A that make up this grating protrusion 2 is set to 50 to 60% of the thickness dimension of the base 1, and further, the inclination angle of the outer surfaces of the raised peripheral walls 2A of the grating protrusion 2 relative to the surface of the base 1 is set to 63 to 65 degrees (the sum of the inclination angles of the outer surfaces of the two raised peripheral walls 2A relative to the perpendicular line passing through the axis of the upper vertex 2a is 50 to 54 degrees).These values ​​are optimal values ​​found by grating various objects (vegetables such as radishes and carrots), and the grater has high performance (the ability to provide good grating action) and excellent strength (durability).

[0049] Furthermore, in this embodiment, cold forging is used as the forging method, so that the grater projection 2 that exhibits the above-mentioned effects can be reliably provided.

[0050] In addition, in this embodiment, the upper vertex 2a of the grating protrusion 2 is formed in a convex curved surface shape, which can prevent dangers such as cutting fingertips (fingers or nails) as much as possible, and in addition to excellent performance that provides good grating action, it also has safety.

[0051] The present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate. [Explanation of symbols]

[0052] X spiral 1 board 2 Grater protrusion 2a Upper vertex 2b Lower apex 2c Ridge

Claims

1. A grater having a number of pyramidal grating protrusions on the surface of a base, the grating protrusions being arranged so that when viewed from a planar direction, the lines connecting the upper vertices of adjacent grating protrusions form a spiral curve consisting of a continuous curve extending from the center of the base to the outer periphery, and further, the grating protrusions arranged in this spiral shape are arranged at equal intervals so that the intervals between the upper vertices are the same pitch.

2. 2. The grater according to claim 1, wherein the grating projections are arranged so as to overlap each other when viewed from the plate surface direction of the base plate.

3. In the grater described in any one of claims 1 and 2, the grating protrusion has a triangular pyramid shape with a lower vertex at the lower end of three ridges obliquely extending from the upper vertex, and the grating protrusion is arranged so that one of the lower vertices coincides with the spiral direction of the spiral curve when viewed from a planar direction.

4. 3. The grater according to claim 1, wherein the spiral curve is an Archimedes spiral or a parabolic spiral.

5. 4. The grater according to claim 3, wherein the spiral curve is an Archimedes spiral or a parabolic spiral.

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