JPH11253709A - Soybean milk squeezing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical filtration tool having small holed with narrow diameter in high density while making the thickness of the tool thick. SOLUTION: This soybean milk squeezing apparatus is constituted by forming a cylindrical shape by joining a large number of ring-like thin sheets 10 whose one sides are made to be smooth faces 11 and the other are made to be grooved faces 12 in layered state while reciprocally joining smooth faces and the grooved faces 12. A large number of thin grooves 15 are formed in the grooved face 12 from the inner circumference to the outer circumference of each ring-like thin sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is used for separating soybean milk and okara by squeezing soybeans in the process of producing tofu, and also used for squeezing liquids such as sake, oil, juice, and kneaded materials. And a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, for example, in a soymilk drawing machine used for producing tofu, a mesh tube having a large number of small holes formed by punching or electron beam processing has been used as a cylindrical filter for drawing. The mesh tube is formed in a tapered shape, and a screw shaft formed in a tapered shape is provided inside the mesh tube.

[0003] Therefore, the soybeans supplied from the base end side of the mesh cylinder are squeezed by the filter action of the mesh cylinder while being sent to the distal end inside the mesh cylinder by the rotation of the screw shaft. In this case, since the mesh cylinder and the screw shaft are formed in a tapered shape, the supplied soybean juice gradually increases in pressure as it is sent in the distal direction, soymilk passing through the small hole, and as it is in the distal direction. It is separated into soybean meal (okara) which is sent to the outlet.

[0004] During the squeezing operation using the mesh cylinder, since grains larger than the small holes of the mesh cylinder are mixed in the grains of the soybean juice, the grains are inevitably clogged in the small holes. When the small holes are clogged in this way, it interferes with the subsequent drawing operation. Regarding the clogging of the small holes, conventionally, the thickness of the mesh cylinder has been formed as thin as possible to try to prevent the clogging as much as possible.

[0005]

However, when the thickness of the mesh cylinder is reduced as in the prior art, the strength of the cylinder is reduced and the durability is deteriorated. For this reason, there arises a problem that the throttle pressure cannot be increased and the working efficiency cannot be improved.

In order to improve the working efficiency by increasing the drawing pressure, the mesh cylinder may be formed thicker.
When the thickness of the mesh cylinder is increased, there is a technical limit to the process of reducing the hole diameter of the small holes or increasing the density of the small holes. With current technology, machining a small hole of 0.1 mm is limited to a wall thickness of 0.5 mm.

When the thickness of the mesh cylinder is reduced, the processing accuracy of the mesh cylinder is unavoidably reduced.
For this reason, unevenness occurs in the gap between the inner peripheral surface of the mesh cylinder and the outer peripheral surface of the screw shaft, and in order to resolve this unevenness, it is inevitable to widen the gap between the two, and this promotes clogging. The result is the opposite.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems.
It is an object of the present invention to provide a drawing cylindrical filter capable of forming small holes with a small hole diameter at a high density and a method of manufacturing the same.

[0009]

In order to solve the above-mentioned problems, a cylindrical filter for drawing according to the present invention (claim 1) has one surface formed into a smooth surface and the other surface formed into a grooved surface. A number of ring-shaped thin plates are joined in a laminated state in which a smooth surface and a grooved surface are faced to each other and formed in a cylindrical shape, and the grooved surface has a large number from the inner periphery to the outer periphery of the ring-shaped thin plate. Is formed.

In this cylindrical filter for drawing (claim 1), the ring width (the distance from the inner periphery to the outer periphery) of the ring-shaped thin plate becomes thick. Therefore, the thickness is set by the ring width of the ring-shaped thin plate. Further, since the narrow groove is closed by the smooth surface due to the mating between the groove processing surface and the smooth surface, the narrow groove becomes a small hole penetrating from the inner periphery to the outer periphery. Therefore, the size of the small hole is set according to the groove width and the groove depth of the narrow groove. The density of the small holes is determined by the thickness of the ring-shaped thin plate and the pitch of the narrow grooves.

In the method for manufacturing a cylindrical filter for drawing according to the present invention (claim 2), one surface is formed as a smooth surface and the other surface is formed as a groove processed surface having a number of narrow grooves formed radially. A large number of thin sheet materials are used, and the multiple thin sheet materials are joined in a laminated state where the smooth surface and the grooved surface face each other to form a laminated material, and the laminated material is laminated in the axial direction. And processed into a cylindrical shape.

In the method of manufacturing the drawing cylindrical filter (claim 2), the laminating material is formed by joining a large number of thin plate materials in a laminating state where the smooth surface and the grooved surface face each other. Therefore, by processing this laminated material into a cylindrical shape, it is possible to form a drawing cylindrical filter in which small holes formed by narrow grooves penetrate from the inner periphery to the outer periphery.

[0013] Further, the drawing cylindrical filter of the present invention (claim 3) has a number of smooth ring-shaped thin plates having both surfaces formed on a smooth surface, and a number of smooth ring-shaped thin plates having both surfaces formed on a grooved surface. The grooved ring-shaped grooved thin plates are alternately joined in a laminated state to form a cylindrical shape, and a large number of narrow grooves are formed on the grooved surface from the inner periphery to the outer periphery of the grooved ring-shaped plate. Configuration.

[0014] In the cylindrical filter for drawing (claim 3), the ring width (the distance from the inner circumference to the outer circumference) of the ring-shaped thin plate becomes thick. Therefore, the thickness is set by the ring width of the ring-shaped thin plate. Also, because the smooth ring-shaped thin plate and the grooved ring-shaped grooved thin plate are alternately laminated,
The narrow groove is closed by the smooth surface due to the mating between the grooved surface and the smooth surface, and the narrow groove becomes a small hole penetrating from the inner periphery to the outer periphery. Therefore, the size of the small hole is set according to the groove width and the groove depth of the narrow groove. The density of the small holes is determined by the thickness of the ring-shaped thin plate and the pitch of the narrow grooves.

In the method for manufacturing a cylindrical filter for drawing according to the present invention (claim 4), a large number of smooth thin plate materials having both surfaces formed in a smooth surface and a large number of narrow grooves formed in both surfaces in a radial manner are provided. Using a number of grooved sheet materials formed on the grooved surface, the smooth sheet material and the grooved sheet material are alternately joined in a laminated state to form a laminated material, and the laminated material is oriented in the laminating direction. It was configured to be processed into a cylindrical shape in the axial direction.

In the method of manufacturing the drawing cylindrical filter (claim 4), the laminated material is formed by joining a large number of smooth thin plate materials and grooved thin plate materials alternately in a laminated state. If this laminated material is processed into a cylindrical shape, it is possible to form a drawing cylindrical filter in which small holes formed by narrow grooves penetrate from the inner periphery to the outer periphery.

Further, in the method for manufacturing a cylindrical filter for drawing according to the present invention (claim 5), a plurality of smooth thin plate materials having both surfaces formed in a smooth surface and a plurality of slit holes are formed in a radial shape. Using a number of slit sheet materials, the smooth sheet material and the slit sheet material are alternately joined in a laminated state to form a laminated material, and the laminated material is laminated in the axial direction, and the slit is formed. The configuration is such that the hole is opened in the inner circumference and the outer circumference to be processed into a cylindrical shape.

In the method of manufacturing the drawing cylindrical filter (claim 5), the laminated material is formed by alternately laminating a large number of smooth thin plate materials and slit thin plate materials in a laminated state. If this laminated material is processed into a cylindrical shape with slit holes opened on the inner and outer circumferences, it is possible to form a drawing cylindrical filter in which small holes formed by the slit holes penetrate from the inner circumference to the outer circumference.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a cylindrical filter for drawing according to a first embodiment of the present invention,
FIG. 2 is a front view showing a grooved surface of a ring-shaped thin plate constituting the cylindrical filter for drawing.

The squeezing tubular filter 1 is formed by joining a large number of ring-shaped thin plates 10 made of stainless steel in a stacked state to form a tube. This ring-shaped thin plate 10
Has one surface formed on the smooth surface 11 and the other surface formed on the grooved surface 12, and the grooved surface 12 has a large number of narrow grooves 15 extending from the inner periphery 13 to the outer periphery 14 of the ring-shaped thin plate 10. Is formed. Then, this many ring-shaped thin plates 1
0 denotes ring-shaped thin plates 10 and 10 adjacent to each other in the stacked state.
Are joined so that the smooth surface 11 and the grooved surface 12 face each other.

In this embodiment, the ring-shaped thin plate 1
0, the thickness T is 0.2 mm, the ring width B (the distance from the inner circumference 13 to the outer circumference 14) is 5 mm, and the groove width t1 of the narrow groove 15 is set.
And the groove depth t2 is 0.1 mm, and the groove pitch P is 0.3 mm. Also, a cylindrical filter for drawing 1
Is formed in a tapered shape as a whole, and therefore, a number of ring-shaped thin plates 10 constituting the tapered thin plate are formed so that the outer diameter and the inner diameter thereof are gradually reduced.

The grooved surface 12 of the ring-shaped thin plate 10
An etching process is used as a process for forming the narrow groove 15 in FIG. In this etching process, a photosensitive agent is applied to the surface of a metal plate and a photo-engraving is applied to form a corrosion-resistant film, or masking printing is performed with a corrosion-resistant ink, and then the surface is locally etched with a chemical that dissolves the metal. (Etching) is a processing method.

As a method for joining the ring-shaped thin plates 10 in a laminated state, diffusion joining is used. In this diffusion bonding, the surface to be bonded is cleaned, the material is heated to a temperature higher than the recrystallization temperature in a high vacuum or inert atmosphere, and a relatively small pressure is applied in this state. It is a joining method.

Next, a method of manufacturing a cylindrical filter for drawing according to claim 2 of the present invention will be described with reference to FIGS. FIG. 3 is a front view of a thin plate material used in the method of manufacturing the drawing cylindrical filter shown in the first embodiment, and FIG. 4 is a cross-sectional view of a laminated material used in the manufacturing method.

In this manufacturing method, as shown in FIG. 3, a plurality of thin plate materials 10a each having a plurality of thin grooves 15 formed radially on a grooved surface 12 are used. still,
The other surface of the thin plate material 10a is formed as a smooth surface 11. The thin plate material 10a is formed in a ring shape, and its ring width B1 (distance from the inner circumference to the outer circumference) is the thickness of the drawing tubular filter 1 to be manufactured (the ring width B of the ring-shaped thin plate 10). It is formed wider than that. The narrow groove 15 is formed as a tapered groove whose groove width is gradually increased from the inner circumference to the outer circumference. In addition, the narrow groove 15 is
Etching is used as the process for forming the.

Then, the multiple thin plate materials 10a are
The smooth surface 11 and the grooved surface 12 are joined in a laminated state in which they face each other to form a laminated material 10b as shown in FIG. Diffusion bonding is used as a method for bonding the ring-shaped thin plates 10a in a stacked state.

Next, the laminated material 10b is processed into a cylindrical shape with the laminating direction being the axial direction, whereby the cylindrical filter for drawing 1 shown in FIG. 1 can be manufactured.
In addition, electric discharge machining, wire cut electric discharge machining, or mechanical machining is used for this cylindrical machining, and burrs generated at this time are removed by polishing (electrolytic polishing or the like).

Therefore, in this manufacturing method, the laminated material 10
b is a plan view in which a large number of thin plate materials 10a are formed on the smooth surface 11 and the grooved surface 1
2 are formed by joining in a laminated state where they face each other.
As shown in FIG. 1, the aperture filter 1 has a small hole formed by a narrow groove 15 penetrating from an inner periphery 13 to an outer periphery 14.
Can be formed.

In the cylindrical filter 1 for drawing manufactured in this way, the ring width B (the distance from the inner circumference to the outer circumference) of the ring-shaped thin plate 10 is thick. Accordingly, the thickness of the drawing tubular filter 1 is set by the ring width B of the ring-shaped thin plate 10. The grooved surface 12 and the smooth surface 1
Since the narrow groove 15 is closed by the smooth surface 11 due to the contact with 1, the narrow groove 15 becomes a small hole penetrating from the inner circumference 13 to the outer circumference 14. Therefore, the groove width t of the narrow groove 15
The size of the small hole is set by 1 or the groove depth t2.
The density of the small holes is set by the thickness T of the ring-shaped thin plate 10 and the arrangement pitch P of the narrow grooves 15. As a result, the diaphragm filter 1 can be made thicker to increase the pressure resistance, so that the diaphragm pressure can be increased and the work efficiency can be improved.

Next, an example of the use of the throttle tubular filter manufactured as described above will be described with reference to FIG. This figure 5
It is sectional drawing which shows a soymilk squeezing machine.

In the drawing, reference numeral 1 denotes a cylindrical filter for drawing,
It is formed in a tapered shape by the above-mentioned manufacturing method, the base end side is communicated with the supply port 50 of soybean juice, the small hole 15a is formed in the body portion by a small groove, and the tip end portion is an okara discharge port having a pressure regulating valve 51. 52.

The outer periphery of the squeezing cylindrical filter 1 is covered with an outer cylinder 54 while holding the soymilk discharge space 53, and the soymilk discharge port 55 communicates with the soymilk discharge space 53.

A screw shaft 56 is provided inside the drawing cylindrical filter 1, and the screw shaft 56 is formed in a tapered shape along the inner peripheral surface of the drawing cylindrical filter 1.

Therefore, in this soymilk squeezing machine, the supply port 50
The soybean juice supplied to the inside of the squeezing tubular filter 1 is fed through the inside of the squeezing tubular filter 1 by the rotation of the screw shaft 56 in the tip direction. Further, since the drawing tubular filter 1 and the screw shaft 56 are formed in a tapered shape, pressure is gradually applied as the drawing is sent in the distal direction, and the drawing is performed by the filtering action of the drawing tubular filter 1. Therefore, the bean juice is in the small hole 15a.
And the soymilk discharged from the soymilk discharge space 53 through the soymilk discharge port 55, is sent as it is to the distal end of the squeezing cylindrical filter 1, and is discharged from the gap with the pressure regulating valve 51 at the okara discharge port 52. Bean meal (okara).

The cylindrical filter 1 for drawing or the screw shaft 56 is mounted slidably in the axial direction. Therefore, during the squeezing operation when the soy milk squeezing machine is operating,
When the squeezing cylindrical filter 1 is periodically slid to the base end side and the squeezing cylindrical filter 1 or the screw shaft 56 is slid to the distal end side, the inner peripheral surface of the squeezing cylindrical filter 1 and the screw shaft 56 are moved. There is no gap with the outer peripheral surface. Therefore, the soybean grains clogged in the small holes 15a of the squeezing cylindrical filter 1 can be cut out by rotating the screw shaft 56.

In this soymilk squeezing machine, since the squeezing cylindrical filter 1 in which a large number of ring-shaped thin plates 10 are joined in a laminated state is used, the squeezing strength is increased by forming a thick wall. Can be. Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved.
As a result, the gap between the inner peripheral surface of the drawing cylindrical filter 1 and the outer peripheral surface of the screw shaft 56 does not become uneven. Therefore, the gap between the two can be narrowed and clogging can be prevented.

Next, a cylindrical filter for diaphragm according to claim 3 of the present invention will be described. FIG. 6 is a sectional view of a diaphragm cylindrical filter according to a second embodiment of the present invention. The description of the same parts as those in the first embodiment is omitted.

The drawing cylindrical filter 2 has a plurality of smooth ring-shaped thin plates 21 having both surfaces formed on smooth surfaces 20 and 20 and a plurality of smooth ring-shaped thin plates 21 having both surfaces formed on grooved surfaces 22. The grooved ring-shaped thin plates 23 are alternately joined in a laminated state to form a cylindrical shape. And. A large number of narrow grooves 24 are formed on the grooved surface 22 from the inner circumference to the outer circumference of the grooved ring-shaped thin plate.

In the second embodiment, the cylindrical filter 2 for drawing is formed as a whole as a whole, so that a number of smooth ring-shaped thin plates 21 and grooved ring-shaped thin plates 23 constituting the same are formed. , Have the same outer diameter and inner diameter.

Next, a method of manufacturing a cylindrical filter for drawing according to claim 4 of the present invention will be described with reference to FIGS.
FIG. 7 is a front view of a grooved thin plate material used in the method of manufacturing the drawing tubular filter 2 shown in the second embodiment, FIG. 8 is a cross-sectional view of a laminated material used in this method, and FIG. It is an exploded sectional view of a material.

In this manufacturing method, both surfaces are smooth surfaces 20, 2
A number of smooth thin plate materials 21a formed on the grooved surface 22 and a plurality of grooved thin plate materials 23a formed on the grooved surface 22 having a large number of narrow grooves 24 formed radially on both surfaces are used.
In this case, the narrow groove 24 is formed as a straight groove having the same width from the inner circumference to the outer circumference. The smooth thin plate material 21a and the grooved thin plate material 23a are alternately joined in a laminated state to form a laminated material 25, and the laminated material 25 is processed into a straight cylindrical shape with the laminating direction being the axial direction. is there. The other structure is the same as that of the method for manufacturing the cylindrical filter for drawing shown in the second embodiment.

Therefore, in this manufacturing method, the laminated material 25
Is formed by joining a number of smooth thin plate materials 21a and grooved thin plate materials 23a alternately in a laminated state.
If this laminated material 25 is processed into a cylindrical shape, it is possible to form the drawing cylindrical filter 2 in which small holes formed by the narrow grooves 24 penetrate from the inner periphery to the outer periphery.

In the cylindrical filter 2 for drawing manufactured in this manner, since the smooth ring-shaped thin plates 21 and the grooved ring-shaped thin plates 23 are alternately laminated, the grooved surface 2 is formed.
2 and the smooth surface 20, the narrow groove 24 is formed on the smooth surface 20.
The narrow groove 24 becomes a small hole penetrating from the inner circumference to the outer circumference.

FIG. 10 is a cross-sectional view showing an example of use of the diaphragm cylindrical filter manufactured as described above.

In this case, the drawing tubular filter 2 is formed in a straight shape by the above-described manufacturing method, and a screw shaft 6 is provided inside thereof. The screw shaft 6 has a shaft portion 60 formed into a tapered taper shape, and the blade portion 61 has a tip along the inner peripheral surface of the cylindrical filter 2 for drawing and a pitch gradually decreases toward the tip. Is formed.

Therefore, in this example of use, the contents supplied to the inside of the throttle tubular filter 2 are sent to the tip of the throttle tubular filter 2 by the rotation of the screw shaft 6. Since the shaft portion 60 of the screw shaft 6 is formed in a tapered shape, and the pitch of the blade portion 61 is formed so as to gradually decrease toward the tip,
Pressure is gradually applied as the paper is fed in the distal direction, and the paper is narrowed by the filtering action of the cylindrical filter 2 for narrowing.

Next, a method of manufacturing a cylindrical filter for drawing according to claim 5 of the present invention will be described with reference to FIGS. FIG. 11 is a front view of a thin plate material with slits used in the method of manufacturing the drawing cylindrical filter. FIG. 12 is a cross-sectional view of a laminated material used in the method of manufacturing the drawing cylindrical filter.
3 is an enlarged partial sectional view of the laminated material, and FIG. 14 is an exploded sectional view thereof.

In this manufacturing method, a large number of flat thin plate materials 31 having both surfaces formed on the flat surface 30 and a large number of slit thin plate materials 33 having a large number of slit holes 32 formed radially are used. And this smooth thin plate material 3
1 and the thin sheet material 33 with slits are alternately joined in a laminated state to form a laminated material 34. The laminated material 34 is laminated in the axial direction, and the slit hole 32 is formed in the inner periphery 3a.
And by processing into a cylindrical shape so as to open to the outer periphery 3b, the small hole formed by the slit hole 32 is formed in the inner periphery 3a.
The diaphragm cylindrical filter 3 penetrating through to the outer periphery 3b is manufactured. That is, this cylindrical processing is performed by the slit holes 3
2 is performed. In addition, the cylindrical filter 3 for drawing is used.
Is formed straight as a whole.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this. For example, the tubular filter for squeezing of the present invention can be widely used for separating solids and liquids, such as liquids such as sake, oil and juice, and squeezing devices for kneaded materials, in addition to soymilk squeezing machines.

The size of each part of the ring-shaped thin plate constituting the drawing cylindrical filter and the thin plate material or laminated material used in the manufacturing method (plate thickness, ring width, narrow groove width, groove depth, groove pitch, The number of layers is appropriately set according to the apparatus used.

As the processing for forming the narrow grooves and the slit holes on the groove processing surface, in addition to the etching processing, it is possible to use electron beam processing, electric discharge processing, wire cut electric discharge processing, laser processing, mechanical processing, or the like. it can.

In addition, as a method for joining ring-shaped thin plates or thin plate materials in a laminated state, in addition to diffusion bonding, welding,
Welding such as laser welding and sintering can be used.

In FIG. 3, the narrow groove 15 is formed in a tapered groove having a gradually increasing groove width from the inner periphery to the outer periphery, but a straight groove formed with the same width from the inner periphery to the outer periphery. It may be formed in a groove. In FIG. 7, the narrow groove 24 is formed as a straight groove having the same width from the inner periphery to the outer periphery. However, the narrow groove 24 is formed as a taper groove having a gradually increasing groove width from the inner periphery to the outer periphery. May be. Further, in FIG. 11, the slit hole 32 is formed as a straight hole having the same width from the inner periphery to the outer periphery, but is formed in a taper hole having a gradually increasing width from the inner periphery to the outer periphery. You may.

Further, in FIG. 1, the cylindrical filter for drawing 1 is formed in a tapered tape shape, but it may be formed in a straight shape. Also, in FIGS. 6 and 12, the squeezing tubular filters 2 and 3 are formed in a straight line, but may be formed in a tapered tape shape.

[0055]

As described above, according to the present invention, it is possible to obtain a cylindrical filter for drawing in which small holes having a small hole diameter are formed at a high density while forming a thick wall. Therefore, since the pressure resistance can be increased, the drawing pressure can be increased, and the working efficiency can be improved. Further, since the thickness can be increased, an effect that the processing accuracy can be improved can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a diaphragm cylindrical filter according to a first embodiment of the present invention.

FIG. 2 is a front view showing a grooved surface of a ring-shaped thin plate constituting the drawing cylindrical filter.

FIG. 3 is a view for explaining a method of manufacturing a cylindrical filter for drawing according to claim 2 of the present invention, and is a thin plate used in the method of manufacturing a cylindrical filter for drawing according to the first embodiment. It is a front view of a material.

FIG. 4 is a sectional view of a laminated material used in this manufacturing method.

FIG. 5 is a sectional view of a soymilk squeezing machine, showing an example of use of the squeezing tubular filter according to the first embodiment.

FIG. 6 is a sectional view of a cylindrical filter for a diaphragm according to a second embodiment of the present invention.

FIG. 7 is a view for explaining a method of manufacturing a cylindrical filter for drawing according to claim 4 of the present invention, and is a groove used in the method of manufacturing a cylindrical filter for drawing according to the second embodiment. It is a front view of an attached thin plate material.

FIG. 8 is a cross-sectional view of a laminated material used in this manufacturing method.

FIG. 9 is an exploded sectional view of the laminated material.

FIG. 10 is a cross-sectional view illustrating an example of use of a throttle tubular filter according to a second embodiment.

FIG. 11 is a front view of a thin plate material with slits for explaining a method for manufacturing a cylindrical filter for drawing according to claim 5 of the present invention;

FIG. 12 is a cross-sectional view of a laminated material used in this manufacturing method.

FIG. 13 is an enlarged partial sectional view of the laminated material.

FIG. 14 is an exploded sectional view of the laminated material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drawing cylindrical filter 10 Ring-shaped thin plate 11 Smooth surface 12 Grooved surface 15 Narrow groove 10a Thin plate material 10b Laminated material

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[Procedure amendment]

[Submission date] April 30, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Name of the invention]

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soymilk squeezer used for squeezing soybean juice and separating it into soymilk and okara in the process of producing tofu.

[0002]

2. Description of the Related Art Conventionally, for example, in a soymilk drawing machine used for producing tofu, a mesh tube having a large number of small holes formed by punching or electron beam processing has been used as a cylindrical filter for drawing. The mesh tube is formed in a tapered shape, and a screw shaft formed in a tapered shape is provided inside the mesh tube.

[0003] Therefore, the soybeans supplied from the base end side of the mesh cylinder are squeezed by the filter action of the mesh cylinder while being sent to the distal end inside the mesh cylinder by the rotation of the screw shaft. In this case, since the mesh cylinder and the screw shaft are formed in a tapered shape, the supplied soybean juice gradually increases in pressure as it is sent in the distal direction, soymilk passing through the small hole, and as it is in the distal direction. It is separated into soybean meal (okara) which is sent to the outlet.

[0004] During the squeezing operation using the mesh cylinder, since grains larger than the small holes of the mesh cylinder are mixed in the grains of the soybean juice, the grains are inevitably clogged in the small holes. When the small holes are clogged in this way, it interferes with the subsequent drawing operation. Regarding the clogging of the small holes, conventionally, the thickness of the mesh cylinder has been formed as thin as possible to try to prevent the clogging as much as possible.

[0005]

However, when the thickness of the mesh cylinder is reduced as in the prior art, the strength of the mesh cylinder is reduced, and the pressure resistance is deteriorated. For this reason, there arises a problem that the throttle pressure cannot be increased and the working efficiency cannot be improved.

In order to improve the working efficiency by increasing the drawing pressure, the mesh cylinder may be formed thicker.
When the thickness of the mesh cylinder is increased, there is a technical limit to the process of reducing the hole diameter of the small holes or increasing the density of the small holes. With current technology, machining a small hole of 0.1 mm is limited to a wall thickness of 0.5 mm.

When the thickness of the mesh cylinder is reduced, the processing accuracy of the mesh cylinder is unavoidably reduced.
For this reason, unevenness occurs in the gap between the inner peripheral surface of the mesh cylinder and the outer peripheral surface of the screw shaft, and in order to resolve this unevenness, it is inevitable to widen the gap between the two, and this promotes clogging. The result is the opposite.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a soymilk squeezing machine capable of improving the working efficiency by increasing the squeezing pressure of soybean juice. It is an issue.

[0009]

In order to solve the above-mentioned problems, a soymilk squeezing machine according to the present invention (Claim 1) comprises a cylindrical filter formed in a tapered shape toward the tip, An outer cylinder that covers the outer periphery of the cylindrical filter while holding the soymilk discharge space, and a spiral blade that is provided inside the cylindrical filter and that has a spiral blade formed in a tapered shape along the inner peripheral surface of the cylindrical filter. A soy milk squeezing machine, comprising a screw shaft provided with a soybean supply port communicating with the inside of the base end of the cylindrical filter, and a tip port of the cylindrical filter communicating with an okara discharge port. A cylindrical filter is formed by joining a number of ring-shaped thin plates, each having a smooth surface on one side and a grooved surface on the other side, in a laminated state in which the smooth surface and the grooved surface are faced to each other. The grooved surface extends from the inner circumference to the outer circumference of the ring-shaped thin plate. And a configuration in which a large number of fine grooves are formed.

In this soymilk squeezing machine (Claim 1), since a cylindrical filter in which a large number of ring-shaped thin plates are joined in a laminated state is used, it is possible to increase the pressure resistance by forming a thick wall. it can. Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved. As a result, the gap between the inner peripheral surface of the cylindrical filter and the outer peripheral surface of the screw shaft does not become uneven, so that the gap between them can be narrowed and clogging can be prevented.
In this cylindrical filter, the ring width (distance from the inner circumference to the outer circumference) of the ring-shaped thin plate becomes thick. Therefore, the thickness is set by the ring width of the ring-shaped thin plate. or,
Since the narrow groove is closed by the smooth surface due to the mating between the grooved surface and the smooth surface, the narrow groove becomes a small hole penetrating from the inner periphery to the outer periphery. Therefore, the size of the small hole is set according to the groove width and the groove depth of the narrow groove. The density of the small holes is determined by the thickness of the ring-shaped thin plate and the pitch of the narrow grooves.

The soymilk squeezing machine of the present invention (claim 2)
A cylindrical filter formed in a straight shape, an outer cylinder which covers the outer periphery of the cylindrical filter while holding the soymilk discharge space, and a shaft provided in the inside of the cylindrical filter, and having a tapered tip. A screw shaft formed in the shape of a shell, the spiral blades extending along the inner peripheral surface of the cylindrical filter, and a screw shaft formed so that the pitch becomes gradually smaller toward the distal end; A soymilk supply port communicates with the soybean milk squeezing machine, and a distal end port of the cylindrical filter communicates with an okara discharge port, wherein the cylindrical filter has a smooth surface on one side and an opposite surface on the other side. A number of ring-shaped thin plates formed on the grooved surface are joined in a stacked state in which the smooth surface and the grooved surface are faced to be formed into a cylindrical shape, and the ring-shaped thin plate is formed on the grooved surface. It has a configuration in which many narrow grooves from the circumference to the outer circumference are formed. .

In this soybean milk squeezing machine (Claim 2), since a cylindrical filter in which a large number of ring-shaped thin plates are joined in a laminated state is used, it is possible to increase the wall thickness and increase the pressure resistance. it can. Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved. As a result, the gap between the inner peripheral surface of the cylindrical filter and the outer peripheral surface of the screw shaft does not become uneven, so that the gap between them can be narrowed and clogging can be prevented.
In this case, the ring width (distance from the inner circumference to the outer circumference) of the ring-shaped thin plate is thick. Therefore, the thickness is set by the ring width of the ring-shaped thin plate. Further, since the narrow groove is closed by the smooth surface due to the mating between the groove processing surface and the smooth surface, the narrow groove becomes a small hole penetrating from the inner periphery to the outer periphery. Therefore, the size of the small hole is set according to the groove width and the groove depth of the narrow groove. The density of the small holes is determined by the thickness of the ring-shaped thin plate and the pitch of the narrow grooves.

In this soymilk squeezing machine (Claim 3), the cylindrical filter according to Claim 1 or 2 comprises a plurality of smooth ring-shaped thin plates having both surfaces formed into smooth surfaces, and grooves formed on both surfaces. A large number of grooved ring-shaped thin plates formed on the surface are alternately joined in a stacked state to form a cylindrical shape, and the grooved surface has a large number of grooves from the inner periphery to the outer periphery of the grooved ring-shaped thin plate. The configuration was such that a narrow groove was formed.

In this soymilk squeezing machine (Claim 3), a thick wall is used because a cylindrical filter in which a large number of smooth ring-shaped thin plates and grooved ring-shaped thin plates are alternately joined in a stacked state is used. It can be formed to increase the pressure resistance.
Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved. As a result, the gap between the inner peripheral surface of the cylindrical filter and the outer peripheral surface of the screw shaft does not become uneven, so that the gap between both can be narrowed,
Clogging can be prevented. In this cylindrical filter, the ring width (distance from the inner circumference to the outer circumference) of the ring-shaped thin plate becomes thick. Therefore, the thickness is set by the ring width of the ring-shaped thin plate. Also, because the smooth ring-shaped thin plate and the grooved ring-shaped grooved thin plate are alternately laminated,
The narrow groove is closed by the smooth surface due to the mating between the grooved surface and the smooth surface, and the narrow groove becomes a small hole penetrating from the inner periphery to the outer periphery. Therefore, the size of the small hole is set according to the groove width and the groove depth of the narrow groove. The density of the small holes is determined by the thickness of the ring-shaped thin plate and the pitch of the narrow grooves.

Further, the soymilk squeezing machine of the present invention (claim 4)
A cylindrical filter according to claim 1 or 2, comprising a plurality of smooth thin plate materials having both surfaces formed in a smooth surface, and a plurality of slit thin materials having a plurality of slit holes formed radially. The smooth thin plate material and the thin plate material with slits are alternately joined in a laminated state to form a laminated material, and the laminated material is laminated in the axial direction, and the slit holes are opened on the inner periphery and the outer periphery. It was configured to be processed into a cylindrical shape.

In this soymilk squeezing machine (Claim 4), the laminating material uses a cylindrical filter formed by alternately laminating a large number of smooth thin plate materials and slit thin plate materials in a laminated state. The thickness can be increased to increase the pressure resistance. Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved. As a result, the gap between the inner peripheral surface of the cylindrical filter and the outer peripheral surface of the screw shaft does not become uneven, so that the gap between them can be narrowed and clogging can be prevented.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a cylindrical filter used in a soymilk drawing machine according to a first embodiment, and FIG. 2 is a front view showing a grooved surface of a ring-shaped thin plate constituting the cylindrical filter.

The tubular filter 1 is formed by joining a number of ring-shaped thin plates 10 made of stainless steel in a laminated state to form a tubular shape. The ring-shaped thin plate 10 has one surface formed on the smooth surface 11 and the other surface formed on the grooved surface 12.
The grooved surface 12 has a ring-shaped thin plate 10
Are formed with a large number of narrow grooves 15 extending from the inner circumference 13 to the outer circumference 14. And this many ring-shaped thin plates 10
In the stacked state, the smooth surfaces 11 and the grooved surfaces 12 of the adjacent ring-shaped thin plates 10 are joined so as to face each other.

In this embodiment, the ring-shaped thin plate 1
0, the thickness T is 0.2 mm, the ring width B (the distance from the inner circumference 13 to the outer circumference 14) is 5 mm, and the groove width t1 of the narrow groove 15 is set.
And the groove depth t2 is 0.1 mm, and the groove pitch P is 0.3 mm. Further, the cylindrical filter 1 is formed in a tapered shape as a whole, and therefore, a large number of ring-shaped thin plates 10 constituting the cylindrical filter 1 are formed so that the outer diameter and the inner diameter thereof are gradually reduced.

The grooved surface 12 of the ring-shaped thin plate 10
An etching process is used as a process for forming the narrow groove 15 in FIG. In this etching process, a photosensitive agent is applied to the surface of a metal plate and a photo-engraving is applied to form a corrosion-resistant film, or masking printing is performed with a corrosion-resistant ink, and then the surface is locally etched with a chemical that dissolves the metal. (Etching) is a processing method.

Diffusion bonding is used as a method of bonding the ring-shaped thin plates 10 in a laminated state. In this diffusion bonding, the surface to be bonded is cleaned, the material is heated to a temperature higher than the recrystallization temperature in a high vacuum or inert atmosphere, and a relatively small pressure is applied in this state. It is a joining method.

Next, a method of manufacturing the cylindrical filter will be described with reference to FIG.
And FIG. FIG. 3 is a front view of a thin plate material used in the method of manufacturing the cylindrical filter, and FIG. 4 is a cross-sectional view of a laminated material used in the method.

In this manufacturing method, as shown in FIG. 3, a plurality of thin sheet materials 10a each having a plurality of narrow grooves 15 formed radially on a grooved surface 12 are used. still,
The other surface of the thin plate material 10a is formed as a smooth surface 11. The thin plate material 10a is formed in a ring shape, and its ring width B1 (distance from the inner circumference to the outer circumference) is larger than the thickness of the cylindrical filter 1 to be manufactured (the ring width B of the ring-shaped thin plate 10). It is formed wide. The narrow groove 15
Are formed in a tapered groove whose groove width is gradually increased from the inner circumference to the outer circumference. Note that an etching process is used as a process for forming the narrow groove 15 on the groove processing surface 12.

Then, the multiple thin plate materials 10a are
The smooth surface 11 and the grooved surface 12 are joined in a laminated state in which they face each other to form a laminated material 10b as shown in FIG. Diffusion bonding is used as a method for bonding the ring-shaped thin plates 10a in a stacked state.

Next, the laminated material 10b is processed into a cylindrical shape with the laminating direction being the axial direction, whereby the cylindrical filter 1 shown in FIG. 1 can be manufactured. In addition, electric discharge machining, wire cut electric discharge machining, or mechanical machining is used for this cylindrical machining, and burrs generated at this time are removed by polishing (electrolytic polishing or the like).

Therefore, in this manufacturing method, the laminated material 10
b is a plan view in which a large number of thin plate materials 10a are formed on the smooth surface 11 and the grooved surface 1
2 are formed by joining in a laminated state where they face each other.
As shown in FIG. 1, the cylindrical filter 1 in which the small hole formed by the narrow groove 15 penetrates from the inner periphery 13 to the outer periphery 14 can be formed.

In the cylindrical filter 1 manufactured as described above, the ring width B (the distance from the inner circumference to the outer circumference) of the ring-shaped thin plate 10 becomes thick. Therefore, the thickness of the cylindrical filter 1 is set by the ring width B of the ring-shaped thin plate 10. Further, since the narrow groove 15 is closed by the smooth surface 11 due to the mating between the groove processing surface 12 and the smooth surface 11, the narrow groove 15 becomes a small hole penetrating from the inner periphery 13 to the outer periphery 14. Therefore, the groove width t1 of the narrow groove 15 and the groove depth t
2 sets the size of the small hole. The density of the small holes is set by the thickness T of the ring-shaped thin plate 10 and the arrangement pitch P of the narrow grooves 15. As a result, since the thickness of the cylindrical filter 1 can be increased to increase the pressure resistance, the drawing pressure can be increased and the working efficiency can be improved.

Next, a soymilk squeezer using the cylindrical filter manufactured as described above will be described with reference to FIG.

In the figure, reference numeral 1 denotes a cylindrical filter which is formed in a tapered shape by the above-mentioned manufacturing method, the base end of which is communicated with a soybean supply port 50, and a small hole 1 formed by a narrow groove in the body.
5a are formed in a large number, and the leading end is connected to an okara discharge port 52 having a pressure regulating valve 51.

The outer periphery of the cylindrical filter 1 is covered with an outer cylinder 54 while holding the soymilk discharge space 53.
The soymilk discharge port 55 communicates with the soymilk discharge space 53.

A screw shaft 56 is provided inside the cylindrical filter 1, and the spiral blades of the screw shaft 56 are formed in a tapered shape along the inner peripheral surface of the cylindrical filter 1.

Therefore, in this soymilk squeezing machine, the supply port 50
The soybean juice supplied to the inside of the cylindrical filter 1 through the through-hole is sent to the tip of the cylindrical filter 1 by the rotation of the screw shaft 56. Since the cylindrical filter 1 and the screw shaft 56 are formed in a tapered shape, pressure is gradually applied as the cylindrical filter 1 and the screw shaft 56 are fed toward the distal end, and the cylindrical filter 1 is squeezed by the filter action. Therefore, the soybean juice is discharged from the soymilk discharge space 53 through the small hole 15 a through the soymilk discharge port 55 and the soymilk is sent as it is toward the distal end of the cylindrical filter 1. Is separated from soybean meal (okara) discharged from the gap.

The cylindrical filter 1 or screw shaft 56 is slidably mounted in the axial direction. Therefore, during the squeezing operation in which the soy milk squeezing machine is operating, if the cylindrical filter 1 is periodically slid to the base end side and the cylindrical filter 1 or the screw shaft 56 is slid to the distal end side,
The gap between the inner peripheral surface of the cylindrical filter 1 and the outer peripheral surface of the screw shaft 56 is eliminated. Therefore, the small hole 15a of the cylindrical filter 1
The soybean grains clogged in the can be cut out by rotating the screw shaft 56.

In this soymilk squeezing machine, since the cylindrical filter 1 in which a large number of ring-shaped thin plates 10 are joined in a laminated state is used, the thickness can be increased to increase the pressure resistance. . Therefore, the throttle pressure can be increased and the working efficiency can be improved. Further, since the thickness can be increased, the processing accuracy can be improved. As a result, the gap between the inner peripheral surface of the cylindrical filter 1 and the outer peripheral surface of the screw shaft 56 does not become uneven. Therefore, the gap between the two can be narrowed and clogging can be prevented.

Next, another cylindrical filter will be described. FIG.
FIG. 4 is a sectional view of a cylindrical filter used in a soymilk squeezing machine according to a second embodiment of the present invention. In addition, the cylindrical filter 1
The description of the same parts as those described above is omitted.

This cylindrical filter 2 has smooth surfaces 2 on both sides.
Numerous smooth ring-shaped thin plates 2 formed at 0,20
1 and a large number of grooved ring-shaped thin plates 23 having both surfaces formed on the grooved surfaces 22 and 22 are alternately joined in a stacked state to form a cylindrical shape. And. A large number of narrow grooves 24 are formed on the grooved surface 22 from the inner circumference to the outer circumference of the grooved ring-shaped thin plate.

The cylindrical filter 2 is formed straight as a whole. Therefore, a large number of smooth ring-shaped thin plates 21 and grooved ring-shaped thin plates 23 constituting the same have the same outer diameter and inner diameter. Is formed.

Next, a method of manufacturing this cylindrical filter is shown in FIG.
This will be described with reference to FIG. FIG. 7 is a front view of a grooved sheet material used in the method of manufacturing the cylindrical filter 2, FIG. 8 is a cross-sectional view of a laminated material used in the manufacturing method, and FIG. 9 is an exploded cross-sectional view of the laminated material.

In this manufacturing method, both surfaces are smooth surfaces 20, 2
A number of smooth thin plate materials 21a formed on the grooved surface 22 and a plurality of grooved thin plate materials 23a formed on the grooved surface 22 having a large number of narrow grooves 24 formed radially on both surfaces are used.
In this case, the narrow groove 24 is formed as a straight groove having the same width from the inner circumference to the outer circumference. The smooth thin plate material 21a and the grooved thin plate material 23a are alternately joined in a laminated state to form a laminated material 25, and the laminated material 25 is processed into a straight cylindrical shape with the laminating direction being the axial direction. is there. The other structure is the same as the method for manufacturing the cylindrical filter 1.

Therefore, in this manufacturing method, the laminated material 25
Is formed by joining a number of smooth thin plate materials 21a and grooved thin plate materials 23a alternately in a laminated state.
If the laminated material 25 is processed into a cylindrical shape, the cylindrical filter 2 in which the small holes formed by the narrow grooves 24 penetrate from the inner periphery to the outer periphery can be formed.

In the cylindrical filter 2 manufactured in this manner, since the smooth ring-shaped thin plates 21 and the grooved ring-shaped thin plates 23 are alternately laminated, the grooved surface 22 and the smooth surface 20 are formed. The narrow groove 24 is closed by the smooth surface 20 due to the condition, and the narrow groove 24 becomes a small hole penetrating from the inner periphery to the outer periphery.

FIG. 10 is a sectional view showing a main part of a soymilk squeezing machine using the cylindrical filter manufactured as described above.

In this case, the cylindrical filter 2 is formed in a straight shape by the above-described manufacturing method, and a screw shaft 6 is provided therein. The screw shaft 6 has a shaft portion 60 formed in a tapered tapered shape.
1 is formed such that the tip thereof is along the inner peripheral surface of the cylindrical filter 2 and the pitch gradually decreases toward the tip.

Therefore, in this soymilk squeezing machine, the contents supplied to the inside of the cylindrical filter 2 are sent to the tip of the cylindrical filter 2 by the rotation of the screw shaft 6. Since the shaft portion 60 of the screw shaft 6 is formed in a tapered shape and the pitch of the spiral blade 61 is gradually reduced toward the tip, the pressure gradually increases as the screw blade 61 is fed in the tip direction. Is added, and it is squeezed by the filter action of the cylindrical filter 2.

Next, a method for producing a cylindrical filter used in the soymilk squeezing machine of the present invention will be described with reference to FIGS. FIG. 11 is a front view of a thin plate material with slits used in the method of manufacturing the cylindrical filter, FIG. 12 is a cross-sectional view of a laminated material used in the method of manufacturing the cylindrical filter, FIG. 13 is an enlarged partial cross-sectional view of the laminated material, FIG. 14 is an exploded sectional view thereof.

In this manufacturing method, a large number of flat sheet materials 31 having both surfaces formed on the smooth surface 30 and a large number of thin sheet materials with slits 33 having a large number of slit holes 32 formed radially are used. And this smooth thin plate material 3
1 and the thin sheet material with slits 33 are alternately joined in a laminated state to form a laminated material 34. The laminated material 34 is laminated in the axial direction, and the slit hole 32 is formed in the inner periphery 3a.
And by processing into a cylindrical shape so as to open to the outer periphery 3b, the small hole formed by the slit hole 32 is formed in the inner periphery 3a.
The cylindrical filter 3 which penetrates the outer periphery 3b from the cylindrical filter 3 is manufactured. That is, this cylindrical processing is performed within the range of the slit hole 32. The cylindrical filter 3 is formed straight as a whole.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this. For example, the size (plate thickness, ring width, groove width of a narrow groove, groove depth, groove pitch, number of layers, etc.) of a ring-shaped thin plate forming a cylindrical filter, a thin plate material used in a manufacturing method, and a laminated material are as follows. It is set appropriately according to the device to be used.

As the processing for forming the fine grooves and the slit holes on the groove processing surface, in addition to the etching processing, electron beam processing, electric discharge processing, wire cut electric discharge processing, laser processing, mechanical processing, or the like may be used. it can.

As a method for joining ring-shaped thin plates or thin plate materials in a laminated state, in addition to diffusion bonding, welding,
Welding such as laser welding and sintering can be used.

In FIG. 3, the narrow groove 15 is formed in a tapered groove having a gradually increasing groove width from the inner periphery to the outer periphery. It may be formed in a groove. In FIG. 7, the narrow groove 24 is formed as a straight groove having the same width from the inner periphery to the outer periphery. However, the narrow groove 24 is formed as a taper groove having a gradually increasing groove width from the inner periphery to the outer periphery. May be. Further, in FIG. 11, the slit hole 32 is formed as a straight hole having the same width from the inner periphery to the outer periphery, but is formed in a taper hole having a gradually increasing width from the inner periphery to the outer periphery. You may.

In FIG. 1, the cylindrical filter 1 has a tapered tape.
Although it is formed in a pat-like shape, it may be formed in a straight line. In FIGS. 6 and 12, the cylindrical filters 2 and 3 are formed in a straight line, but may be formed in a tapered tape shape.

[0052]

As described above, according to the present invention, it is possible to obtain a cylindrical filter in which small holes having a small hole diameter are formed at a high density while forming a thick wall. Therefore, since the pressure resistance can be increased, the drawing pressure can be increased, and the working efficiency can be improved.
Further, since the thickness can be increased, an effect that the processing accuracy can be improved can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cylindrical filter used in a soymilk squeezing machine according to a first embodiment of the present invention.

FIG. 2 is a front view showing a grooved surface of a ring-shaped thin plate constituting the cylindrical filter.

FIG. 3 is a front view of a thin plate material used for manufacturing the cylindrical filter.

FIG. 4 is a cross-sectional view of a laminated material used in the production.

FIG. 5 is a sectional view of a main part of the soymilk squeezing machine of the first embodiment.

FIG. 6 is a sectional view of a cylindrical filter used in a soymilk squeezing machine according to a second embodiment.

FIG. 7 is a front view of a grooved thin plate material used for manufacturing the cylindrical filter.

FIG. 8 is a cross-sectional view of a laminated material used in this production.

FIG. 9 is an exploded sectional view of the laminated material.

FIG. 10 is a sectional view of a main part of a soymilk squeezing machine according to a second embodiment.

FIG. 11 is a front view of a sheet material with a slit used for manufacturing another cylindrical filter.

FIG. 12 is a cross-sectional view of a laminated material used for this production.

FIG. 13 is an enlarged partial sectional view of the laminated material.

FIG. 14 is an exploded sectional view of the laminated material.

[Description of Signs] 1 Cylindrical filter 10 Ring-shaped thin plate 11 Smooth surface 12 Grooved surface 15 Thin groove 10a Thin plate material 10b Laminated material

Claims (5)

[Claims] 1. A large number of ring-shaped thin plates having one surface formed into a smooth surface and the other surface formed into a grooved surface are joined in a laminated state in which the smooth surface and the grooved surface are faced to each other. A cylindrical filter for drawing, characterized in that it is formed in a cylindrical shape, and a large number of narrow grooves are formed on the groove processing surface from the inner periphery to the outer periphery of the ring-shaped thin plate. 2. A method according to claim 1, wherein one surface is formed as a smooth surface and the other surface is formed as a plurality of thin plate materials formed on a groove processing surface in which a plurality of narrow grooves are formed radially. A cylindrical filter for drawing, characterized in that a laminated material is formed by joining in a laminated state in which a smooth surface and a groove processing surface face each other, and the laminated material is processed into a cylindrical shape with the laminating direction being an axial direction. Production method. 3. A plurality of smooth ring-shaped thin plates having both surfaces formed on a smooth surface, and a number of grooved ring-shaped thin plates having both surfaces formed on a grooved surface are alternately joined in a laminated state. A cylindrical filter for drawing, characterized in that a large number of narrow grooves from the inner circumference to the outer circumference of the grooved ring-shaped thin plate are formed on the groove processing surface. 4. Use of a plurality of smooth thin plate materials having both surfaces formed on a smooth surface, and a plurality of grooved thin plate materials having both surfaces formed on a groove processing surface having a large number of narrow grooves formed radially. The drawing sheet is characterized in that the smooth sheet material and the grooved sheet material are alternately joined in a laminated state to form a laminated material, and the laminated material is processed into a cylindrical shape with the laminating direction being the axial direction. Filter manufacturing method. 5. Use of a plurality of smooth thin plate materials having both surfaces formed in a smooth surface, and a plurality of slit thin plate materials in which a large number of slit holes are radially formed. The laminating material is alternately joined in a laminated state to form a laminated material, and the laminated material is formed into a cylindrical shape so that the laminating direction is set to the axial direction and the slit holes are opened on the inner periphery and the outer periphery. A method for producing a cylindrical filter for drawing.