JPH08187721A - Cutter blade for stone ceremonial implement and molding method for the same implement - Google Patents

Abstract

PURPOSE: To provide a cutting blade for a stone ceremonial implement in which the outside and the bored part can be simultaneously cut and which can be accurately cut even by an unexperienced person with high operating efficiency and has no damage at an external appearance. CONSTITUTION: The cutter blade for a stone ceremonial implement comprises a boardlike base 2, a fixed part 3 fixed to the center of the base to fix the end to a rotary shaft of a motor, etc., a hollow cylindrical outer blade support 4 interconnected to the outer periphery of the base, a hollow cylindrical inner blade support 5 interconnected to the base 2 concentrically with the support 4 inside the support 4, an outer blade 6 fixed to the end of the support 4, and an inner blade 7 fixed to the end of the support 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cutting tool for a stone funeral tool and a method for forming a stone funeral tool for cutting a stone funeral tool for graves and funerals from stone materials such as granite, andesite, and marble.
In particular, the present invention relates to a cutting blade for a stone funeral tool and a method for forming the stone funeral tool that can simultaneously cut the outer surface of the hollow cylindrical body of the stone funeral tool, the boring portion, and the like.

[0002]

2. Description of the Related Art In recent years, the use of stone materials such as granite, andesite, and marble in the funeral tools arranged in front of the grave or in the garden has attracted attention because it creates a spiritual atmosphere and is highly durable. The funeral tool made of stone had a hollow cylindrical abdomen, and molding of this abdomen involved various difficulties. Further, since stone is a hard and brittle material, it is not easy to cut and form it, and various techniques have been studied.

A cutting blade of a conventional stone funeral tool will be described below with reference to the drawings. FIG. 7 is a sectional front view of a cutting blade of a conventional stone funeral tool. In FIG. 7, 50 is a cutting blade of a conventional funeral tool made of stone, 51 is a base made of plate-shaped carbon steel or the like that rotates at the time of cutting, 52 is rotatably supported by a rotary shaft of a rotating device, and a rotary motion is transmitted to the base 51. A fixed portion made of carbon steel that is integrally formed by projecting at the center of the base body 51,
Reference numeral 52a denotes a water injection port for injecting cutting water formed by penetrating the central portion of the fixed portion 52 and the base body 50, and 52b denotes the fixed portion 52.
A chuck portion 53 formed in a flat plate shape on the side of the
Is continuously provided on the outer peripheral portion of the base 51 downwardly.
And a hollow cylindrical blade support portion integrally formed with carbon steel, 54 is fixed to the end portion of the blade support portion 53, and the blade support portion 53
Is a blade portion in which diamond whetstones in which rectangular parallelepiped diamonds having a width wider than the thickness are dispersed are arranged at predetermined intervals.

A method of forming a stone funeral tool using the cutting blade of the stone funeral tool constructed as described above will be described below.
FIG. 8 is a perspective view of the stone lantern, FIG. 9 is a perspective view of the body of the stone lantern, and FIG. 10 is a perspective view showing a step of forming the cup holder of the pre-grave cup. 8 and 9
In 60, 60 is a stone lantern for lighting a candle, 61 is a hollow cylindrical body in which a candle standing on a candlestick is stored, and 62 is fixed on the upper portion of the body 61 to prevent rain and wind from entering. 62a is a cap made of stone material, 62a is a draft formed in the center of the cap, and a draft is punched from the center of the protruding part to the body. 63 is an opening on the side of the body 61 for taking in and out candles and for wind and rain. An opening for covering a cover for preventing the stagnation, 64 is fixed to the lower end of the body 61 and is made of stone lantern 6
It is a pedestal part that supports 0. In FIG. 10, 70 is a hollow cylindrical stone material, 71 is a hollow drinking cup that supports the brim of a synthetic resin cup that fits into the graveyard drinking cup, and 72 is an outer surface of the drinking cup 71. A pattern portion formed by the formed groove portion, and 73 is a cutting line indicating a position where the tubular stone material 70 is cut and the respective drinking cups 71 are separated. 8,
A method of forming the body 61 and the tubular stone 70 in FIGS. 9 and 10 by using the cutting blade of the stone funeral tool will be described below. First, the stone material is fixed by a fixing jig, and the above-mentioned conventional cutting blade 50 is rotated to press it against the cutting portion of the stone material to cut the stone material into a cylindrical shape. At this time, cooling water is sprayed from the water injection port 52a to the cutting blade 50 to cool the cutting blade 50 for cutting. Next, the cut-out cylindrical stone material is fixed, and the boring is cut in the same manner as the case where the outer surface is cut by the cylindrical cutting blade 50 having a small diameter for boring. At this time, be careful of the positioning of the cylinder so that the boring is formed concentrically from the center. Next, the surface is polished with a grindstone or polishing paper to smooth and finish the surface. After opening the opening 63 on the side surface of the body 61 obtained by the above method, the cap 62 is fixed to the upper end and the pedestal 64 is fixed to the lower end to complete the stone lantern 60. Further, after forming the pattern portion 72 on the side surface of the cylindrical stone material 70 obtained by the above method, the cup portion 71 is separated by cutting along the cutting line 73 to complete the cup portion 71.

[0005]

However, the above-mentioned conventional cutting blade of the stone funeral tool and the method of forming the stone funeral tool have the following problems. (1) It is necessary to cut out the boring part as a separate process after cutting out the outer peripheral part, and the cutting process is divided into two steps, and the work takes time, so that the cut object is attached to the fixed jig, the cutting blade is replaced, etc. It had a problem of lack of workability. (2) After cutting the cut product into a cylindrical shape, the cut product is fixed again with a fixing jig and the cutting blade is replaced for cutting.
There is a problem in that it is difficult to position the center of the cut product, and it is impossible to accurately cut the boring part, and the finish accuracy of the cut product is poor and the product yield is low. (3) Since the outer part and the boring part are cut in separate steps, a skilled experience is required to position the cut product in the boring step, and there is a problem that an inexperienced person cannot perform the work. . (4) Since the hollow cylinder of the boring part is cut after cutting into a cylindrical shape, the cutting surface of the cylinder must be fixed with a fixing jig when the boring part is cut, and the surface of the cutting product is scratched. It had a problem of impairing the appearance.

The present invention solves the above-mentioned conventional problems, and the outer surface and the boring part can be cut at the same time, the work efficiency is high, and even an inexperienced person can cut with high accuracy and the appearance of the stone funeral tool is not damaged. It is an object of the present invention to provide a cutting blade for a stone funeral tool that can be used for molding, and a method for molding a stone funeral tool that has high workability and high processing accuracy.

[0007]

In order to achieve this object, a cutting blade of a stone funeral tool according to claim 1 of the present invention comprises:
A plate-shaped base body, a fixed portion fixed to the central portion of the base body, and an end portion fixed to a rotary shaft of a motor or the like, a hollow cylindrical outer blade support portion continuous to the outer peripheral portion of the base body, and an outer blade. Inside the support portion, a hollow cylindrical inner blade support portion that is concentrically connected to the outer blade support portion on the base body, an outer blade portion fixed to the end portion of the outer blade support portion, and an inner blade support portion And an inner blade portion fixed to the end portion. The cutting blade of the funeral tool made of stone according to claim 2 of the present invention comprises a disk-shaped base body, a fixing portion that is fixed to the central portion of the base body, and the end portion is fixed to a rotating shaft such as a motor, and the outer peripheral portion of the base body. And a hollow cylindrical outer blade support portion continuously connected to the base, and a hollow cylindrical middle blade that is shorter than the outer blade support portion and is connected to the base inside the outer blade support portion concentrically with the outer blade support portion. A support portion, a hollow cylindrical inner blade support portion that is concentrically connected to the base body inside the middle blade support portion, and an outer blade portion fixed to an end portion of the outer blade support portion. A configuration is provided that includes a middle blade portion fixed to an end portion of the middle blade support portion and an inner blade portion fixed to an end portion of the inner blade support portion. The cutting blade of the funeral tool made of stone according to claim 3 of the present invention is the cutting blade according to any one of claims 1 or 2, wherein the inner blade support portion and / or the middle blade support portion is detachably fitted to the base body. It is configured to be arranged. The cutting blade of the stone funeral tool according to claim 4 of the present invention is the cutting blade according to any one of claims 1 to 3, wherein the outer blade part, the middle blade part, and
Each blade of the inner blade has a structure formed of a segment-shaped diamond grindstone. In the method for forming a stone funeral tool according to claim 5 of the present invention, the outer peripheral surface and the boring portion are simultaneously pressed against the stone material while rotating the double-circular cutting blade that is doubled in concentric circles. It is configured to include a cutting step of cutting to form a body part of a stone funeral tool having a hollow cylindrical shape, and a polishing step of polishing a cutting surface formed in the cutting step.
The method for forming a stone funeral tool according to claim 6 of the present invention is
A cutting step in which a hollow hat-shaped body is formed by simultaneously cutting the boring portion, the outer peripheral surface, and the brim portion that are pressed against the stone material while rotating the triple-circular cutting blade that is concentrically formed into a triple layer, A polishing process for polishing the cutting surface formed in the cutting process,
It has a configuration having.

Here, the shape of the substrate is preferably a disk shape.
However, when the cutting blade is large, it may be formed in an elliptical shape or the like and the grip portion may be formed at the outer edge of the continuous portion of the outer blade portion. The cutting blade may be joined to the base body, the fixed portion, the outer blade support portion by welding or the like,
It is preferably molded integrally. This is because it has high strength and withstands the stress acting during cutting and improves durability. Substrate,
The material of the fixing portion, the outer blade supporting portion, and the inner blade supporting portion is preferably metal such as structural carbon steel, alloy steel, stainless steel, cast iron, and aluminum alloy. This is because they are excellent in both strength and toughness. The inner blade support portion may be formed integrally with the base body, but may be detachably fitted and fixed. This is because the diameter of the boring part can be changed. The fitting and fixing method includes drilling through-holes in the base and the inner blade support and fixing them with bolts and nuts, forming a thread groove on the base and screwing the inner blade support, and hook-shaped groove on the base. A method is used in which the projection portion provided with the inner blade support portion is locked in the groove portion. The outer blade support part, inner blade support part, and middle blade support part are provided upright accurately from the base body so that the outer blade part, inner blade part, and middle blade part at the ends do not become eccentric during rotation, and their diameters are different. It is preferable that they are formed identically in position. This is because the upright body having the same wall thickness is formed. The height of the inner blade support portion and the outer blade support portion is preferably higher than the height of the tubular body to be cut.
This is because the blade portion is fed to the cut portion during cutting. The heights of the inner blade support portion and the outer blade support portion are usually the same, but the height of the inner blade support portion may be shortened when the bottom is left at the boring portion. The surface of each component may be coated with rust-preventive paint. This is to prevent corrosion from occurring due to the release of cutting water during cutting and to improve corrosion resistance. The fixing portion may be provided with a fixing hole or a plate-like portion for fitting. This is because it is firmly fixed to the rotating shaft of the motor or the like.

For the inner blade portion, the middle blade portion and the outer blade portion, a diamond grindstone in which steel or tungsten is used as a binder and diamond powder is uniformly dispersed is used. Depending on the arrangement method, the blade attachment method of the diamond grindstone is a continuous type in which the diamond grindstone is formed on the entire surface, an insert type in which the diamond grindstone and the binder phase are arranged at predetermined intervals, and only the diamond grindstone is arranged at predetermined intervals A segment type having a part may be used. A segment shape is preferably used for the inner blade portion, the outer blade portion, and the middle blade portion. This is because the cutting speed is fast, and a polishing step is performed in the subsequent step, and the cutting roughness of the segment type is sufficient. The width of each blade is preferably set larger than the width of each support. This is for ensuring the rotation margin of each support portion. Each blade is fixed to each support by welding or the like. This is to strengthen the fixation.

[0010]

With this structure, the fixed portion can be fixed to the rotary shaft of the motor or the like to transmit the rotary motion to the base body.
The base body concentrically arranges the inner blade support portion, the middle blade support portion, and the outer blade support portion, and transmits the rotational movement of the fixed portion to the inner blade support portion and the outer blade support portion, and the inner blade support portion, the middle blade support portion, and The outer blade support can be rotated concentrically. Further, the height of the inner blade support portion and the outer blade support portion is formed higher than the height of the cut object, and the inner blade support portion and the outer blade support portion cut the inner blade portion and the outer blade portion until the cutting is completed. Can be sent inside.
The inner and outer blades rotate concentrically and doubly simultaneously, and are pressed and contact the cutting object, so that the boring part and the outer surface of the cutting object can be cut at the same time, and the belly part of the hollow cylindrical funerary tool can be cut. Can be cut in a single cutting process. Therefore, the positional accuracy of the cutting blade is accurate, the cutting accuracy is accurate, and the wall thickness can be made uniform. Further, since the outer blade portion, the low-height middle blade portion, and the inner blade portion are concentrically triple pressured to rotate and come into contact with the cut object, a hollow cylindrical shape having a pedestal portion at the bottom is formed. The abdomen can be cut.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional front view of a cutting blade of a stone funeral tool in a first embodiment of the present invention, and FIG. 2 is a bottom surface of a cutting blade of a stone funeral tool in a first embodiment of the present invention. It is an end view. 1 and 2, reference numeral 1 is a cutting blade of a stone funeral tool in the first embodiment capable of simultaneously cutting the outer side portion and the boring portion, and 2 is carbon steel in which an outer blade support portion and an inner blade support portion are erected. A base 3 made of, for example, is formed integrally with the base 2 upright in the central portion of the base 2 and is rotatably supported by a rotary shaft (not shown) of a rotary drive device such as a motor to transmit the rotary motion to the base 2. The fixed portions 3a are formed to penetrate through the central portions of the base 2 and the fixed portion 3, and are water injection ports for injecting cutting water and supplying water to the blade portions.
Reference numeral b is a chuck portion for mounting a fixing jig formed in parallel with the side portion of the fixing portion 3, and 4 is a thin-walled hollow cylindrical base body with the rotation axis of the fixing portion 3 as the central axis on the outer peripheral portion of the base body 2. An outer blade support part made of carbon steel that is integrally connected to 2 and rotates during cutting,
Reference numeral 5 is a thin-walled hollow cylindrical carbon steel that is continuously provided inside the outer blade support portion 4 at the same height as the outer blade support portion 4 and concentrically integrally with the base body 2 and rotates at the same angular velocity as the outer blade support portion 4. The inner blade support portion 6 is composed of a segment-shaped diamond grindstone having a width fixed to the end of the outer blade support portion 4 and having a width larger than the thickness of the outer blade support portion 4, and 7 is a cutting surface. Is located on the same plane as the cutting surface of the outer blade portion 6 and is fixed to the end of the inner blade supporting portion 5 and has a width larger than the thickness of the inner blade supporting portion 5 Is.

A method of forming a stone funeral tool using the cutting blade of the stone funeral tool of the first embodiment configured as described above will be described. A rectangular parallelepiped granite was prepared, and this granite was fixed by a fixing jig of a drilling machine. The cutting blade 1 of the stone funeral tool in the first embodiment was attached to the rotary shaft of the cutting machine while fixing the chuck portion 3b. While rotating the cutting blade 1, it was manually pressed and brought into contact with the cutting surface of the granite. At this time, adjust the rotation speed and the pressure applied to the cutting surface to set the cutting speed to 1
It was adjusted to 00 to 300 cm ² . Cooling water was injected from the water injection port 3a and sprayed onto the cutting blade to prevent the temperature of the cutting blade from rising. A rust preventive agent may be added to the cutting water in order to prevent rust due to the cutting water. The cutting part was a concentric double circle, and the outer circle was cut on the outer side and the inner circle was cut on the hollow part of the abdomen of the funeral tool. In the method of forming a stone funeral tool of the present invention, the outer surface and the hollow portion of the boring portion are simultaneously cut, and the cutting is completed in one step. The cutting blade was penetrated to the bottom of the granite to complete the molding of the abdomen of the hollow cylindrical funeral tool. FIG. 3 is a perspective view of the abdomen of the funeral tool that has been cut. here,
8 is the abdomen of the funeral tool. Next, the surface of this abdomen was polished with a grindstone or polishing paper to finish the surface. Further, a candle was taken in and out on the side surface of the abdomen to form an opening serving as an inlet for combustion air. Next, the cap was placed on the upper part and the pedestal was fixed on the lower part to complete the stone funeral tool.

As described above, according to this embodiment, the thin-walled hollow cylindrical inner blade support portion which is concentrically connected to the outer blade support portion located on the outer periphery and is continuously connected to the base body, and the same plane as the outer blade portion. Since the inner blade portion made of a segment-shaped diamond grindstone located concentrically and fixed to the end portion of the inner blade supporting portion is provided,
The abdomen of the hollow cylindrical stone funeral tool having the same thickness can be cut at the same time in one step, and the working time can be shortened and the working efficiency can be remarkably improved. Further, since the cutting blade is formed by a precisely positioned concentric double circle, the outer wall surface and the circular wall surface of the boring portion become accurate concentric circles, and the processing accuracy can be improved.

(Embodiment 2) FIG. 4 is a sectional front view of a cutting blade of a stone funeral tool in a second embodiment of the present invention. FIG.
In, 2 is a base, 3 is a fixed part, 3a is a water inlet, 3b
Is a chuck portion, 4 is an outer blade supporting portion, 5 is an inner blade supporting portion, 6 is an outer blade portion, and 7 is an inner blade portion. Since these are the same as those in the first embodiment, the same reference numerals are given and the description is omitted. 10
Is a cutting blade of the stone funeral tool in the second embodiment in which the inner blade support 5 is detachably fitted to the base 2, and 11 is detachably fitted inside the base 2 so that the inner blade support 5 is integrated. Is a plate-shaped carbon steel fitting plate that is continuously provided on the base plate, 12 is a plurality of through holes that are formed at predetermined intervals and that penetrates the base plate 2 and the fitting plate 11, and 13 is a base plate that is inserted into the through hole 12. 2 and fitting plate 1
It is a fixture made up of bolts, nuts, etc. that firmly fix the 1.

As described above, according to the present embodiment, the fitting plate in which the inner blade supporting portion, which is detachably fitted to the base body, is continuously provided,
Since the through hole for fixing the base body and the fitting plate and the fixture are provided, the diameter of the inner blade can be freely changed in addition to the effect described in the first embodiment, and the hollow part of the abdomen of the hollow funeral tool is hollow. The diameter of the stone can be changed, and various types of stone funeral tools can be formed.

(Embodiment 3) FIG. 5 is a sectional front view of a cutting blade of a stone funeral tool in a third embodiment of the present invention. Figure 5
In, 2 is a base, 3 is a fixed part, 3a is a water inlet, 3b
Is a chuck portion, 4 is an outer blade supporting portion, 6 is an outer blade portion, and 7 is an inner blade portion. Since these are the same as those in the first embodiment, the same reference numerals are given and the description is omitted. Reference numeral 20 is a cutting blade of the stone funeral tool in the third embodiment, which is hollowed while leaving the bottom.
1 is a rotary shaft of the fixed part 3 as a central axis and a height is an outer blade support part 4
It is a thin hollow cylindrical inner blade support portion integrally connected to the lower base body 2.

As described above, according to this embodiment, since the inner blade support portion having a shorter height than the outer blade support portion is provided, the bottom portion can be left in the middle in addition to the effect of the first embodiment. It is possible to integrally form the stone lantern candle holder on the abdomen.

(Embodiment 4) FIG. 6 is a sectional front view of a cutting blade of a stone funeral tool in a fourth embodiment of the present invention. Figure 6
In, 2 is a base, 3 is a fixed part, 3a is a water inlet, 3b
Is a chuck portion, 4 is an outer blade supporting portion, 5 is an inner blade supporting portion, 6 is an outer blade portion, and 7 is an inner blade portion. Since these are the same as those in the first embodiment, the same reference numerals are given and the description is omitted. 30
Is a cutting blade of the stone funeral tool in the fourth embodiment in which a pedestal is formed in the lower part of the abdomen, and 31 is provided between the outer blade support 4 and the inner blade support 5 on the base body 2 concentrically with each support. A hollow cylindrical middle blade support portion which is continuously provided and has a height shorter than that of the outer blade support portion 4, and 32 is a middle blade portion made of a segment-shaped diamond grindstone fixed to an end portion of the middle blade support portion 31.

As described above, according to the present embodiment, a hollow cylindrical middle blade supporting portion shorter than the height of the outer blade supporting portion between the outer blade supporting portion and the inner blade supporting portion, and an end of the middle blade supporting portion. Since the inner blade portion fixed to the portion is provided, in addition to the effect described in the first embodiment, a cylindrical pedestal portion integrally formed with the body portion can be formed at the lower edge portion of the body portion, A wide variety of stone funeral tools can be created.

[0020]

As described above, according to the present invention, a hollow cylindrical outer blade supporting portion, an outer blade portion fixed to the end of the outer blade supporting portion in a circular shape, and a concentric circle of the outer blade supporting portion. Since the inner blade supporting portion provided in a shape and the inner blade portion fixed to the end of the inner blade supporting portion in a circular shape are provided, the cutting of the stone funeral tool having the following excellent effects is provided. A blade can be realized. (1) The outer side surface and the boring part can be completed at the same time in a single cutting step, and the working time can be shortened and the belly part of the hollow cylindrical stone funeral tool can be efficiently formed. Further, the work of replacing the cutting blade and re-fixing the cut object can be omitted, and the workability can be remarkably improved. (2) When manufacturing the cutting blade, the outer blade support portion and the inner blade support portion can be accurately machined by a machine tool, and the inner blade portion and the outer blade portion are accurately positioned. Therefore, the positional accuracy of the outer side surface and the boring part cut by this cutting blade can be made extremely high, and the body part of the stone funeral tool having a uniform thickness can be manufactured. In addition, since the cutting blade is manufactured with high reproducibility and high precision, high quality products can be mass-produced and the productivity can be remarkably enhanced. (3) The machining accuracy of the outer surface and boring part is determined only by the accuracy of the cutting blade, and there are few factors that depend on the skill of the operator such as mounting the cutting object on the fixing jig or mounting the cutting blade. Even inexperienced people can easily work. (4) There is no step of directly fixing the cut product, and there is no concern that surface scratches or the like will occur due to contact with the fixing jig, and a product without surface scratches can be obtained. (5) Since the diameter of the inner blade can be freely adjusted, the wall thickness of the body can be freely selected and various different types of stone funeral tools can be molded. (6) The boring part can be formed while leaving the bottom part, and the candle mounting table can be integrally formed on the abdomen. (7) A pedestal part can be integrally formed at the lower edge of the body part, and various types of stone funeral tools of different forms can be manufactured to meet the diverse needs of customers. In addition, since a cutting process for cutting the outer surface and the boring part at the same time by using a concentric double or triple cutting blade, a stone funeral with the following excellent effects is provided. It is possible to realize a molding method for a tool. (1) The outer surface and the boring part can be cut at the same time, resulting in good working efficiency and excellent mass productivity. (2) The thickness of the outer surface and the boring surface can be evenly and accurately finished, and the product can be mass-processed with high processing accuracy and high quality. (3) Because of the boring, the outer surface is not chucked and the outer surface is not scratched, so that a product without surface scratches can be manufactured. (4) The brim-shaped pedestal that is continuously provided on the lower edge of the body can also be formed at the same time during the cutting process, and various work types of stone funeral tools with high work efficiency can be formed.

[Brief description of drawings]

FIG. 1 is a sectional front view of a cutting blade of a stone funeral tool in the first embodiment.

FIG. 2 is a bottom end view of the cutting blade of the stone funeral tool in the first embodiment.

FIG. 3 is a perspective view of the abdomen of the funeral tool that has been cut.

FIG. 4 is a sectional front view of a cutting blade of a stone funeral tool in the second embodiment.

FIG. 5 is a sectional front view of a cutting blade of a funeral tool made of stone according to a third embodiment.

FIG. 6 is a sectional front view of a cutting blade of a stone funeral tool in the fourth embodiment.

FIG. 7 is a sectional front view of a cutting blade of a conventional stone funeral tool.

FIG. 8 is a perspective view of a stone lantern.

FIG. 9 is a perspective view of a body portion of a stone lantern.

FIG. 10 is a perspective view showing a forming process of a drinking cup receiving portion of the front grave drinking cup.

[Explanation of symbols]

 1 Cutting Blade of Stone Funeral Tool in First Example 2 Base 3 Fixing 3a Water Injection Port 3b Chuck 4 Outer Blade Support 5 Inner Blade Support 6 Outer Blade 7 Inner Blade 8 Abdomen 10 of Funeral Tool 2 Cutting blade of stone funeral tool in the example 11 Fitting plate 12 Through hole 13 Fixing tool 20 Cutting blade of stone funeral tool in the third example 21 Inner blade support 30 Cutting blade of stone funeral tool in the fourth example 31 Medium Blade Support 32 Medium Blade 50 Cutting Blade of Conventional Stone Funeral Tool 51 Base 52 Fixing 52a Water Injection Port 52b Chuck 53 Blade Support 54 Blade 60 Stone Lantern 61 Body 62 Cap 62a Draft 63 Opening 64 Base part 70 Cylindrical stone material 71 Drinking cup holder 72 Pattern part 73 Cutting line

Claims (6)

[Claims] 1. A disk-shaped base body, and a fixed portion fixed to a central portion of the base body and having an end portion fixed to a rotating shaft of a motor or the like.
A hollow-cylindrical outer blade support portion that is continuously provided on the outer peripheral portion of the base body, and a hollow cylindrical inner blade that is continuously provided on the base body inside the outer blade support portion concentrically with the outer blade support portion. A stone funeral tool comprising a support portion, an outer blade portion fixed to an end portion of the outer blade support portion, and an inner blade portion fixed to an end portion of the inner blade support portion. Cutting blade. 2. A disk-shaped base body, a fixing portion which is fixed to a central portion of the base body and whose end portion is fixed to a rotating shaft of a motor or the like, and a hollow cylindrical outer blade continuously provided on an outer peripheral portion of the base body. A support part,
Inside the outer blade support portion, a hollow cylindrical middle blade support portion that is concentrically formed with the outer blade support portion and is continuous with the base body and has a shorter length than the outer blade support portion, and the inside of the middle blade support portion. A hollow cylindrical inner blade support portion that is concentrically connected to the base body in the middle blade support portion, an outer blade portion fixed to an end portion of the outer blade support portion, and the middle blade support portion A cutting blade for a stone funeral tool, comprising a middle blade portion fixed to an end portion and an inner blade portion fixed to an end portion of the inner blade support portion. 3. The inner blade support portion and / or the middle blade support portion is disposed so as to be detachably fitted to the base body. Cutting blade of stone funeral tool described in. 4. The outer blade portion, the middle blade portion, and the inner blade portion are each formed of a segment-shaped diamond grindstone. A cutting blade for a funeral tool made of stone according to item 1. 5. A body of a funeral tool made of stone, which has a hollow cylindrical shape by pressing a stone material while rotating a double-circular cutting blade which is doubled in a concentric shape and simultaneously cuts an outer peripheral surface and a boring portion. A method of forming a stone funeral tool, comprising: a cutting step of forming a portion; and a polishing step of polishing the cutting surface formed in the cutting step. 6. A hollow hat-shaped body is formed by simultaneously pressing the stone material and simultaneously cutting the boring portion, the outer peripheral surface, and the brim portion while rotating a triple-circular cutting blade having a concentric triple structure. And a polishing step of polishing the cutting surface formed in the cutting step.