JP5334022B2 - Bean peeling machine - Google Patents

Description

  The present invention relates to a peeling machine that peels soybeans and other beans and separates them into skin and body (cotyledon part), and more particularly, to a peeling machine that can peel the raw beans in a dry state.

  In the patent document 1, the present applicant has proposed a method for producing tofu that eliminates the occurrence of okara. In this production method, the skin and hypocotyl are removed from soybean in advance to produce a tofu raw material consisting only of cotyledon parts, and the tofu raw material is crushed into a tofu raw material powder. The tofu raw material powder is expanded and softened by immersing it in a boiled pan with the soaking liquid to produce koji soup, and after cooling the koji soup, adding a coagulant and stirring it, placing it in a molding container, molding it, That's it. According to this manufacturing method, since the tofu is manufactured after removing the skin that is the source of the okara, the texture of the tofu becomes smooth and the labor and cost required for disposal of the okara can be reduced. .

  In order to produce tofu by the above-described method, a dehulling device that peels soybean skin and separates it into peel and cotyledon parts is required. Soybeans are widely used as food ingredients other than tofu, and the processing aspects of useful parts differ depending on their uses, so that various soy peeling machines have been proposed. In particular, as a soy peeling machine utilizing mechanical action, the raw soybean is soaked in water or heated and then peeled off, and the raw soybean is peeled off in a dry state. Can be divided roughly. Moreover, there are a thing which collect | recovers the cotyledon part which peeled the whole in the state of a half or a half body, without crushing or shaving as much as possible, and a thing which grinds a cotyledon part and processes it into a powder form.

  A device that involves dipping or heat treatment at the time of peeling is apt to be large and expensive, and moisture remains in the discarded skin and other parts, which makes the disposal difficult. Therefore, it is preferable that soybeans for tofu can be peeled off in a dry state. Further, in the above-described method for producing tofu, the tofu raw material after the molting process is pulverized, soaked and boiled, so the cotyledon part may be ground in the molting stage.

  As a known molting device that meets such conditions, a soybean with a skin is put into a drum, and an impeller having a projection on the surface is rotated in the drum (for example, Patent Document 2), which rotate in opposite directions. One that allows skinned soybeans to pass through the gap between the two rollers (for example, Patent Documents 3 and 4), and one that allows skinned soybeans to pass through a gap between a rotating body formed of an inner cylinder and an outer cylinder, each having an uneven surface on the opposite surface. (For example, patent document 5) etc. are mentioned.

JP 2008-253198 A JP-A-11-225726 JP 2002-355003 A JP 2004-73088 A JP-A-11-266818

  The present invention has a simpler structure than the known molting device, can be manufactured at low cost, is suitable for downsizing the entire device, and efficiently peels soybeans and other beans. Thus, a molting device that can be separated into a skin and a cotyledon is provided.

In order to achieve the above-described object, the bean molting device of the present invention includes a grinding unit for grinding raw material beans in a dry state to produce a mixture of skin pieces and cotyledon pieces, and a lower part of the grinding unit. In a bean molting apparatus comprising: a wind selection unit that is provided and separates the mixture into skin pieces and cotyledon pieces,
The grinding portion has a gap narrower than the average minor axis dimension of the raw beans between an inner cylinder that is driven to rotate about a rotation shaft that is installed horizontally and an outer peripheral surface of the inner cylinder. A plurality of grooves extending in the axial direction of the inner cylinder are formed on the outer peripheral surface of the inner cylinder, and at least the lower half of the outer cylinder is made of raw beans. A large number of sieving holes smaller than the average minor axis size are formed, and the raw beans introduced from the inlet provided in the upper part are bitten between the inner cylinder and the outer cylinder, and the skin pieces and cotyledon pieces And the mixture is configured to pass through a sieve hole of the outer cylinder and fall from a dropping port provided below the outer cylinder,
The wind selection section includes a blower on the side that blows a cross wind against the mixture falling from the drop opening, and a partition blade that has an upward slope along the wind direction on the leeward side from below the drop opening. A plurality of pieces are attached with an interval in the vertical direction, and the skin pieces in the mixture receive a crosswind and float, float over the partition blade plate, and are provided on the leeward side of the partition blade plate. On the other hand, the cotyledon pieces in the mixture are configured to fall on the windward side of the partition blade plate and to be accumulated below the drop port.

  In the bean molting device according to the above configuration, the groove formed on the outer peripheral surface of the inner cylinder has a stepped portion in which the front side in the rotation direction of the inner cylinder is notched along the radial direction of the inner cylinder, It is preferable that the rear side in the rotation direction of the inner cylinder is a slope portion that is inclined downward from the outer peripheral surface of the inner cylinder toward the bottom of the stepped portion.

  Moreover, the drop port and the partition blade can be provided so as to extend along the rotation axis direction of the inner cylinder.

  The bean molting device of the present invention configured as described above particularly relates to Patent Document 5 in that the grinding portion having the inner and outer double cylinder structure is installed with the rotation axis of the inner cylinder facing sideways. When compared with the conventional example, it has the following advantages.

  (1) In this invention, the electric motor etc. for driving a rotating shaft can be arrange | positioned to the side etc. of a grinding part, and the freedom degree in the structural design of the whole apparatus is high. That is, in the conventional example according to Patent Document 5, since the rotating shaft of the inner cylinder is arranged vertically and the mixture crushed below the shaft portion gathers, the mixture outlet and the bearing member are close to each other. However, the structure around the bearings must be complicated, but in the present invention, such a problem does not occur in the bearings. The structure and the structure around the bearing of the rotating shaft are easy to simplify.

  (2) In the present invention, it is possible to extend the drop opening and the partition blade plate for separating the mixture below the outlet along the rotation axis direction of the inner cylinder. That is, in the conventional example according to Patent Document 5, since the rotation shaft is arranged vertically and the mixture outlet can be provided only below the shaft portion, there is a limit to increasing the processing efficiency. On the other hand, according to the present invention, it is possible to increase the processing efficiency without increasing the diameter of the grinding part by extending the axial length of the grinding part and extending the dropping port and the partition blade plate in accordance with it. Easy.

  (3) In this invention, the structure of an inner cylinder and an outer cylinder can be simplified and it can manufacture at low cost. That is, in the conventional example according to Patent Document 5, since the rotation shaft is arranged vertically and the raw beans are introduced from above, the tapered surface is formed on either the inner cylinder or the outer cylinder so that the raw beans are easily bitten. In the present invention, the inner cylinder and the outer cylinder are costly to manufacture, whereas in the present invention, both the inner cylinder and the outer cylinder are tapered. Is not required. Moreover, in the conventional example which concerns on patent document 5, the elastic ring which consists of synthetic resins, rubber | gum, etc. is fitted in the surface of the inner cylinder, On the other hand, in this invention, that kind of elastic ring is not required, but stainless steel An inner cylinder can be simply formed only with a steel plate or the like.

  In addition, the bean molting device of the present invention configured as described above is provided with a plurality of partition blades that are inclined upward and downward along the direction of the wind, and are provided at intervals in the vertical direction. The separation accuracy between the skin pieces and the cotyledon pieces can be easily improved by appropriately securing the fall distance from the drop opening and increasing the number of partition blades.

  Due to these advantages, it becomes easy to secure the desired processing efficiency by simplifying and downsizing the entire apparatus, and it becomes easy to promote the spread by reducing the price of the apparatus.

It is a longitudinal cross-sectional schematic diagram which shows the basic concept of the bean molting apparatus which concerns on embodiment of this invention. It is a perspective view which shows the principal part shape of the inner cylinder and outer cylinder which comprise a grinding part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the basic concept of the present invention. The molting device 1 includes a grinding unit 2 that crushes the raw beans 9 to produce a mixture of the skin pieces 91 and cotyledon pieces 92, and is provided below the grinding unit 2. The wind selection unit 6 that separates the cotyledon piece 92 from the cotyledon piece 92 is provided, and is configured by being incorporated into an appropriate mount or box-like body (not shown).

  The grinding unit 2 is a part having an inner and outer double cylinder structure, and the inner cylinder 3 is rotationally driven inside the outer cylinder 4 around a rotating shaft 31 installed sideways. An electric motor or the like (not shown) for rotationally driving the inner cylinder 3 is disposed at an extension destination of the rotating shaft 31.

  As shown in FIG. 2, the inner cylinder 3 is a cylindrical body having a substantially uniform cross section having an appropriate axial length, for example, formed by winding a stainless steel plate or the like. A plurality of grooves 32 extending in the axial direction of the inner cylinder 3 are formed on the outer peripheral surface of the inner cylinder 3. The groove 32 according to the exemplary embodiment is configured such that the front side in the rotation direction of the inner cylinder 3 (clockwise in FIG. 1) is a stepped portion 33 cut out along the radial direction of the inner cylinder 3. The rear side in the rotation direction is formed to be a slope portion 34 that slopes downward from the outer peripheral surface of the inner cylinder 3 toward the bottom portion of the step portion 33.

  The outer cylinder 4 is a cylinder that is fixed so as to surround the inner cylinder 3 with a predetermined gap 21 between the outer cylinder 4 and the outer peripheral surface of the inner cylinder 3. The magnitude | size of the clearance gap 21 is set so that it may become slightly narrower than the average breadth dimension of the raw material beans 9. FIG. The average minor axis size of the raw beans 9 is in detail according to the agricultural product inspection standards of the Ministry of Agriculture, Forestry and Fisheries, etc., but as a guide, it is approximately 7.5 mm for large soybeans, approximately 6.5 mm for medium soybeans and approximately 6.5 mm for small soybeans. 5.5 mm.

  The outer cylinder 4 according to the illustrated embodiment is configured by tying an upper half part 41 and a lower half part 42 of a halved shape. A hopper 23 that leads to the inlet 22 for the raw beans 9 is provided at the top of the upper half 41. In the upper half 41, no opening is provided in any part other than the inlet 22.

  The lower half portion 42 of the outer cylinder 4 is a porous body as shown in FIG. 2, and is formed by, for example, bending a punching metal made of stainless steel. Each hole has a sieve hole 43 whose diameter is slightly smaller than the average short diameter dimension of the raw beans 9 (the same as described above).

  In the gap 21 between the inner cylinder 3 and the outer cylinder 4 configured as described above, the raw material beans 9 in a dry state from which coarse impurities and the like have been removed in advance are introduced from the upper inlet 22. The charged raw beans 9 are wound into the gap 21 along the rotating inner cylinder 3 and contact the ridge corner edge of the groove 32 formed in the inner cylinder 3 or the peripheral edge of the sieve hole 43 to cause a crack on the surface. Further, the skin is peeled off while being crushed in the gap 21 narrower than the average minor axis dimension of the raw beans 9, and a mixture of the skin pieces 91 and the cotyledon pieces 92 is obtained. The size of the cotyledon piece 92 after grinding is approximately one-fifth of the raw beans 9. In addition, about the space | interval of the bottom part of the groove 32 formed in the inner cylinder 3, and the outer cylinder 4, it is preferable to set this to the dimension about the largest diameter of the raw material beans 9, and, thereby, the biting of the raw beans 9 Is moderately dispersed, and the inner cylinder 3 is easily rotated smoothly.

  The mixture of the skin piece 91 and the cotyledon piece 92 passes through the sieve hole 43 formed in the lower half portion 42 of the outer cylinder 4. A chute surrounded by a side cover 51, a slope 52, and the like is provided below the outer cylinder 4, and a drop port 53 is opened downward at the bottom to communicate with the wind selection unit 6. Yes. The drop port 53 is preferably elongated in the axial direction of the inner cylinder 3 so as to have an opening length similar to the axial length of the inner cylinder 3 in terms of processing efficiency.

  The wind selector 6 is a box-like body that secures a space of an appropriate height below the drop port 53, and includes a blower 61 on the side thereof. The blower 61 takes in outside air from an air supply port 62 with a filter that is opened at the side of the wind selection unit 6, and sends a cross wind into the wind selection unit 6. On the inner side of the blower 61, a rectifying grid 63 for making the air flow in the wind selector 6 uniform is attached.

  On the leeward side (right side in FIG. 1) directly below the dropping port 53, a plurality of partition blade plates 64 having an upward slope along the wind direction are attached at intervals in the vertical direction. In the illustrated embodiment, each of the five partition blades 64 has an inclination of about 45 °, and the lower edge of the upper partition blade plate 64 and the upper edge of the lower partition blade plate 64 have the same height. It is attached in a positional relationship that aligns with It is preferable that the partition blade 64 is also provided over a length equal to or greater than the opening length of the drop port 53 along the axial direction of the inner cylinder 3.

  When a cross wind with an appropriate wind speed and volume is blown against the mixture falling into the wind selector 6 from the drop opening 53, the skin piece 91 in the mixture floats on the cross wind and the inclined surface of the partition blade 64 And is transported to the skin piece collecting portion 65 provided on the leeward side of the partition blade 64. On the other hand, the cotyledon piece 92 having a larger specific gravity than the skin piece 91 cannot fall over the inclined surface of the partition blade plate 64 and falls to the windward side of the partition blade plate 64. In this way, the skin piece 91 and the cotyledon piece 92 can be suitably separated by the wind sorting action by the plurality of partition blades 64 arranged in multiple stages along the falling direction. Of course, it is desirable that the wind speed and the amount of air passing between the partition blades 64 are appropriately adjusted by changing the rotational speed of the blower 61 according to the scale of the apparatus and the state of grinding of the raw beans 9. Further, the inclination angle of the partition blade plate 64 may be changed.

  At the bottom of the grinding unit 2, a cotyledon piece outlet 66 for collecting the cotyledon piece 92 that has fallen to the windward side of the partition blade plate 64 is provided substantially below the dropping port 53. Further, a skin piece outlet 67 is provided at the bottom of the skin piece collecting portion 65. The wind that has carried the skin piece 91 to the skin piece collection unit 65 is discharged from an air exhaust port 68 provided in the upper part of the skin piece collection unit 65. A filter for preventing the skin piece 91 from scattering outside the apparatus is attached to the air exhaust port. With such a configuration, it is possible to obtain a peeling machine 1 that is simpler and less expensive than the prior art, is suitable for downsizing, and can efficiently perform peeling.

DESCRIPTION OF SYMBOLS 1 Dehulling apparatus 2 Grinding part 21 Crevice 22 Input port 3 Inner cylinder 31 Rotating shaft 32 Groove 33 Step part 34 Slope part 4 Outer cylinder 43 Sieve hole 53 Falling port 6 Wind selection part 61 Blower 64 Partition blade board 65 Skin piece collection | recovery Part 9 Raw beans 91 Skin pieces 92 Cotyledon pieces

Claims (3)

A grinding section for grinding raw material beans in a dry state to produce a mixture of skin pieces and cotyledon pieces, and wind selection provided below the grinding section to separate the mixture into skin pieces and cotyledon pieces A bean molting device comprising:
The grinding portion has a gap narrower than the average minor axis dimension of the raw beans between an inner cylinder that is driven to rotate about a rotation shaft that is installed horizontally and an outer peripheral surface of the inner cylinder. A plurality of grooves extending in the axial direction of the inner cylinder are formed on the outer peripheral surface of the inner cylinder, and at least the lower half of the outer cylinder is made of raw beans. A large number of sieving holes smaller than the average minor axis size are formed, and the raw beans introduced from the inlet provided in the upper part are bitten between the inner cylinder and the outer cylinder, and the skin pieces and cotyledon pieces And the mixture is configured to pass through a sieve hole of the outer cylinder and fall from a dropping port provided below the outer cylinder,
The wind selection section includes a blower on the side that blows a cross wind against the mixture falling from the drop opening, and a partition blade that has an upward slope along the wind direction on the leeward side from below the drop opening. A plurality of pieces are attached with an interval in the vertical direction, and the skin pieces in the mixture receive a crosswind and float, float over the partition blade plate, and are provided on the leeward side of the partition blade plate. On the other hand, the cotyledon pieces in the mixture fall on the windward side of the partition slats and are accumulated below the drop opening. The bean molting device according to claim 1,
The groove formed on the outer peripheral surface of the inner cylinder has a stepped portion in which the front side in the rotation direction of the inner cylinder is notched along the radial direction of the inner cylinder, and the rear side in the rotation direction of the inner cylinder is the inner cylinder A bean peeling machine characterized in that it is a slope portion that slopes downwardly from the outer peripheral surface of the step toward the bottom of the stepped portion. In the bean molting device according to claim 1 or 2,
The dropper and the partition vane are provided so as to extend along the rotation axis direction of the inner cylinder.

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