JP6446897B2 - Rice milling machine - Google Patents

Description

  The present invention relates to a rice mill capable of producing white rice containing a large amount of functional components.

  Conventionally, a rice mill equipped with a friction-type milling unit is well known (Patent Document 1).

  The rice milling machine described in Patent Document 1 includes a milling portion having a cylindrical milling net and a milling roll disposed in the milling net, and mills brown rice by grain friction in the milling portion. is there.

  According to the rice mill described in Patent Document 1, white rice having excellent taste and texture can be produced by removing the brown rice bran layer by grain friction.

By the way, it is known that vitamin B1, vitamin B6, and vitamin E, which are functional components, are present in a large amount in the pericarp, seed coat, and paste layer that are brown rice bran layers.
Therefore, in order to obtain white rice containing a large amount of the above functional components, it is necessary to have polished rice that removes only the peel and seed coat with poor taste and texture, and does not remove the paste layer.

However, the glutinous rice bran layer generally has different thicknesses at the abdomen, side and back.
In general, milled rice by grain friction is premised on uniformly removing the brown rice bran layer.

  Therefore, when rice milling is performed with a rice mill described in Patent Document 1, not only the pericarp and seed coat but also part of the paste powder layer and endosperm will be removed and included in the paste powder layer. There is a problem that functional components are lost.

JP 2009-34607 A

  Then, an object of this invention is to provide the rice mill which can manufacture the white rice which contains many functional components.

In order to achieve the above object, the present invention provides:
A rice mill comprising a perforated cylinder and a milling roll rotatably disposed in the perforated cylinder, wherein a milling chamber is formed between the perforated cylinder and the milling roll,
The porous cylinder is formed with a plurality of annular projections projecting toward the inside and having a hole in the center, and a cutting blade is formed on the inner periphery of the tip of the annular projection,
The whitening roll has a front surface located on the positive rotation direction side of the whitening roll inclined backward, and a top surface facing the inner surface of the porous cylinder has a predetermined width in the circumferential direction of the whitening roll. , A whitening protrusion is provided along the axial direction in which the rear surface located on the opposite side to the positive rotation direction of the whitening roll is inclined backward .
The whitening roll is mounted on a hollow rotating shaft having a plurality of air blowing holes and has a air blowing groove communicating with the air blowing hole, and the air blowing groove is formed along the rear surface of the whitening protrusion. It is characterized by Rukoto.

The rice milling machine of the present invention is
It is preferable that the whitening protrusion has a flange that faces the inner surface of the porous cylinder and extends rearward in the forward rotation direction of the whitening roll.

The rice milling machine of the present invention is
The collar part may extend from the rear end of the top surface of the whitening protrusion to the rear in the forward rotation direction of the whitening roll.

The rice milling machine of the present invention is
It is preferable that the annular protrusion has a hemispherical side surface.

The rice milling machine of the present invention is
It is preferable that the porous cylinder has a plurality of holes and a plurality of the annular protrusions.

The rice milling machine of the present invention is
The plurality of holes may include a first hole row K in which the holes are formed in a straight line, and a second hole row L in which the plurality of holes and the plurality of annular protrusions are formed in a line shape. .

The rice milling machine of the present invention is
The hole is an elongated hole, and the plurality of elongated holes formed obliquely with respect to the axial direction of the perforated cylinder, and the plurality of annular protrusions formed between the plurality of elongated holes. It can have.

  According to the rice milling machine of the present invention, a plurality of annular protrusions that protrude toward the inside and have a hole in the center are formed on the porous cylinder, and a cutting blade is formed on the inner periphery of the tip of the annular protrusion. In the milling roll, since the front surface located on the positive rotation direction side of the milling roll is provided with a milling protrusion along the axial direction, the brown rice supplied to the milling chamber is The soot layer is removed by the action of a cutting blade that is directed toward the inner surface of the porous tube by the front surface of the whitening protrusion and is formed on the inner periphery of the tip of the annular protrusion.

The brown rice cocoon layer has a soft property with fibrous pericarp and seed coat, and a hard property with a granular aggregate or cell wall in the paste powder layer.
Therefore, in the rice milling machine according to the present invention, the cutting blade formed on the annular projecting portion effectively acts on the soft skin and seed coat.
Therefore, the rice milling machine of the present invention can remove the pericarp and seed coat from the rice bran layer while leaving the paste layer, so that white rice containing a large amount of functional components can be produced.

Rice mill of the present invention, the polished protrusion has a top surface facing the inner surface of the porous tube, since said top surface has a predetermined width in the circumferential direction of the milling roll, the inner surface of the porous tube A narrow gap of a predetermined length can be formed between the top surface of the milling protrusion and the top surface of the whitening protrusion, so that the time for the cutting blade to act on the rice bran layer is secured, and the pericarp and seed coat are effective. Can be removed.
Further, in the rice milling machine according to the present invention, a rear surface of the whitening protrusion located on the opposite side to the normal rotation direction of the whitening roll is inclined rearward, and the whitening roll has a hollow rotation having a plurality of blowing holes. The blast groove is attached to the shaft and communicates with the blast hole, and the blast groove is formed along the rear surface of the whitening protrusion, so that the air ejected from the blast groove is rearward. Will be ejected toward the rear in the positive rotation direction of the whitening roll along the rear surface of the whitening protrusion inclined toward the surface, and is removed by the action of the cutting blade formed on the inner periphery of the tip of the annular projection. It is possible to efficiently discharge the soot layer from the holes of the porous cylinder.

  In the rice milling machine according to the present invention, if the milling protrusion has a flange portion facing the inner surface of the porous cylinder and extending rearward in the forward rotation direction of the milling roll, the inner surface of the porous cylinder and the basket A narrow gap with a predetermined length can be formed between the cutting part and the cutting blade, so that it is possible to effectively remove the pericarp and seed coat while ensuring the time for the cutting blade to act on the rice bran layer. It becomes.

  Further, in the rice milling machine according to the present invention, if the ridge extends from the rear end of the top surface of the milling protrusion to the rear in the normal rotation direction of the milling roll, the cutting blade is a cocoon layer of the brown rice. Since it is possible to secure a longer time for acting on the skin, it is possible to more effectively remove the pericarp and seed coat.

  In the rice milling machine according to the present invention, if the annular projecting portion has a hemispherical side surface, the side surface of the annular projecting portion becomes a gently curved surface, so that brown rice collides with the annular projecting portion. It is possible to prevent the occurrence of crushed particles.

  In the rice milling machine according to the present invention, if the perforated cylinder has a plurality of holes and a plurality of annular projecting portions, it is removed by the action of a cutting blade formed on the inner periphery of the tip of the annular projecting portion. It is possible to reliably discharge the soot layer from the plurality of holes.

  Further, in the rice milling machine of the present invention, if the whitening protrusion has a flange that faces the inner surface of the porous tube and extends rearward in the forward rotation direction of the whitening roll, The heel portion serves as a guide for the heel layer that is removed in a narrow gap of a predetermined length formed between the heel portion and then scatters in a wide space behind the buttock. Therefore, the soot layer can be more efficiently discharged from the hole of the porous cylinder.

The perspective view of the rice mill in the embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the rice milling machine of FIG. 1. AA sectional drawing of FIG. Detailed explanatory drawing of a fine wire mesh. BB sectional drawing of FIG. The graph which shows the inorganic component content ratio of functional white rice with respect to normal white rice. The graph which shows the functional component content ratio of functional white rice with respect to normal white rice. Explanatory drawing of the modification of a whitening roll. Explanatory drawing of the other modification of a whitening roll.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a perspective view of a rice mill in an embodiment of the present invention. FIG. 2 shows a partial sectional view of the rice milling machine of FIG.

  The rice milling machine 1 in the embodiment of the present invention is a horizontal axis type rice milling machine formed by placing a rice milling unit 3 on a base frame 2.

  The rice milling unit 3 has a cylindrical fine metal mesh 41 and a whitening roll 43 that is mounted on the main shaft 42 and is rotatably disposed in the fine metal mesh 41. A polishing unit 4 having a polishing chamber 44 formed therebetween, a driving unit 7 having a motor 71 that rotationally drives a main shaft 42 to which the whitening roll 43 is mounted, and a unit base 8 that can be stacked and connected are provided.

In the milling unit 4, a raw material supply unit is provided on one end side of the milling chamber 44, and a rice grain discharge unit is provided on the other end side.
The raw material supply unit includes a raw material supply cylinder 45 having a raw material supply port 46 and a raw material hopper 47 disposed in the raw material supply port 46. A spiral roll 48 that is mounted on the main shaft 42 and is driven to rotate is disposed in the raw material supply cylinder 45.

  The rice grain discharge unit includes a cylindrical rice grain discharge cylinder 50 having a rice grain discharge port 49 and a rice grain discharge basket 53 disposed at an outer position corresponding to the rice grain discharge port 49. The rice grain discharge rod 53 is provided with a resistance lid (compression plate) 51 that is energized by a resistance weight (weight) 52 to close the rice grain discharge port 49.

  The whitening roll 43 is provided with a whitening protrusion 55 corresponding to the position of the milling chamber 44, and a rice grain discharge protrusion 56 corresponding to the position of the rice grain discharge cylinder 50.

  The whitening roll 43 is mounted in the hollow portion of the main shaft 42. A plurality of blast holes 57 are formed in the hollow portion of the main shaft 42, and a blower fan 58 communicating with the hollow portion is connected to one end side of the main shaft 42.

  On the other end side of the main shaft 42, a driven pulley 59 connected to a driving pulley (not shown) of the motor 71 in the driving unit 7 by a belt is disposed.

  A collection chamber 60 is formed around the collection chamber 44, and the collection chamber 60 communicates with a collection duct 61 provided below. A residual rice removing air nozzle 63 is disposed on one end side of the milling chamber 44 and below the raw material supply tube 45.

FIG. 3 is a cross-sectional view taken along the line AA in the fine part of FIG. FIG. 4 shows a detailed explanatory view of a fine wire mesh. FIG. 5 shows a cross-sectional view taken along the line BB of FIG.
As shown in FIG. 3, in the embodiment of the present invention, the fine metal mesh 41 is formed in a cylindrical shape by combining two mesh plates 41 a and 41 b having a large number of holes as a semicircular arc shape.

As shown in FIGS. 4 and 5, the mesh plates 41a and 41b are formed with a plurality of annular projecting portions 29 that project to one side and have a hole 29a at the center.
The annular projecting portion 29 has a side surface 29b formed of a hemispherical gentle curved surface, and a cutting blade 29c is formed on the inner periphery of the tip.

  In the embodiment of the present invention, the mesh plates 41a and 41b include a first hole row K in which a plurality of holes 28 are formed linearly along the axial direction, a plurality of holes 28, and a plurality of the annular projections. The portions 29 have second hole rows L that are alternately linearly formed along the axial direction, and the first hole rows K and the second hole rows L are alternately arranged in the circumferential direction of the fine metal mesh 41. It is formed to be arranged.

Here, the fine metal mesh 41 is configured by combining the two mesh plates 41a and 41b so that the plurality of annular projecting portions 29 project inward.
The holes 28 and 29a formed in the mesh plates 41a and 41b are sized so as not to pass the raw material.

The mesh plates 41a and 41b can be formed by, for example, a well-known punching process or press process using a metal plate as a plate material.
In addition, here, the fine metal mesh 41 is configured by combining two mesh plates 41a and 41b, but may be configured by one mesh plate or by combining three or more mesh plates. You can also

As shown in FIG. 3, in the embodiment of the present invention, the whitening roll 43 is provided with two whitening protrusions 55 along the axial direction.
The whitening protrusion 55 is formed such that a front surface 55a located on the positive rotation direction side of the whitening roll 43 is inclined rearward.

The whitening protrusion 55 has a linear top surface 55 b that faces the inner surface of the fine metal mesh 41, and the top surface 55 b has a predetermined width in the circumferential direction of the whitening roll 43.
Further, the whitening protrusion 55 is formed such that a rear surface 55c located on the opposite side of the whitening roll 43 in the forward rotation direction is inclined rearward similarly to the front surface 55a.

A blast groove 65 is formed in the whitening roll 43 along the rear surface 55 c of the whitening protrusion 55.
The blast groove 65 formed in the whitening roll 43 communicates with a plurality of blast holes 57 formed in the hollow portion of the main shaft 42 to which the whitening roll 43 is mounted.

  In the rice milling machine according to the embodiment of the present invention, the brown rice put into the raw material hopper 47 is supplied into the raw material supply cylinder 45 from the raw material supply port 46 and then sent to the milling chamber 44 by the spiral roll 48. .

  The brown rice moves toward the rice grain discharge cylinder 50 while being polished in the milling chamber 44. Then, after the brown rice is polished, it receives the action of the rice grain discharge projections 56 provided on the whitening roll 43 to push open the resistance lid 51 provided at the circumferential surface position of the rice grain discharge cylinder 50, It is discharged from the rice grain outlet 49 to the rice grain outlet 53.

  At that time, air blows out from the blast groove 65 formed in the whitening roll 43 through a plurality of blast holes 57 formed in the hollow portion of the main shaft 42 by the action of the blower fan 58, The soot generated in the chamber 44 is discharged into the collecting chamber 60 through the holes 28 and 29a formed in the fine metal mesh 41.

  Next, in order to confirm the effect of the rice mill in the embodiment of the present invention, an experiment was conducted using two types of brown rice, Hitomebore (variety name) and Koshihikari (variety name).

Table 1 shows the results of white rice polished by a rice mill in the embodiment of the present invention (hereinafter referred to as “functional white rice”) and a commercially available friction-type rice mill (Satake Millmore (model number: HPR25A)). The result of having analyzed the inorganic component and the functional component which are contained in each of the polished rice (hereinafter, referred to as “normal white rice”) is shown.
In addition, both functional white rice and ordinary white rice obtained by experiments have been completely polished to the extent that the skin and seed coat have been completely removed and cannot be distinguished at first glance.

  As shown in Table 1, from the analysis results of Experimental Example 1 (Hitomebori (variety name)) and Experimental Example 2 (Koshihikari (variety name)), functional white rice is higher than ordinary white rice in both types of Hitomebori and Koshihikari. It turns out that many inorganic components and functional components are contained.

FIG. 6 shows a graph of the inorganic component content ratio of functional white rice to normal white rice based on the analysis results of Table 1. Moreover, FIG. 7 shows the graph of the functional component content ratio of functional white rice with respect to normal white rice based on the analysis results of Table 1.
From the comparison of the graphs shown in FIGS. 6 and 7, it can be seen that, in both Hitomebore and Koshihikari varieties, functional white rice contains more functional components than inorganic components compared to ordinary white rice.

In general, inorganic components such as potassium, magnesium, phosphorus, and zinc are known to be contained more in the pericarp and seed coat in brown rice straw than in functional components such as vitamin B1, vitamin B6, and vitamin E. Yes.
Therefore, for the functional white rice, the above results show that the content of the inorganic component is reduced to a value close to that of ordinary white rice by removing the skin and seed coat, while the paste layer remains, This indicates that the content is higher than that of plain white rice.

  As mentioned above, according to the rice mill in the embodiment of the present invention, it was experimentally confirmed that white rice containing a large amount of functional components can be produced.

According to the rice milling machine in the embodiment of the present invention, the brown rice supplied to the milling chamber 44 is directed toward the inner surface of the milled metal net 41 by the front surface 55a of the milling protrusion 55, and the annular projecting portion 29 The scissor layer is removed by the action of the cutting blade 29c formed on the inner periphery of the tip.
At this time, the brown rice bran layer is made of a soft fibery skin pericarp and seed coat, and a hard property of the glue powder layer having granular aggregates and cell walls. The blade 29c effectively acts on the soft skin and seed coat.
Therefore, the rice milling machine according to the embodiment of the present invention can remove the pericarp / seed coat from the brown rice straw layer, while leaving the paste layer, so that white rice containing a large amount of functional components can be produced. it can.

According to the rice milling machine according to the embodiment of the present invention, the whitening protrusion 55 has a linear top surface 55b facing the inner surface of the milled wire net 41, and the top surface 55b is a circle of the whitening roll 43. Since it has a predetermined width in the circumferential direction, a narrow gap G having a predetermined length can be formed between the inner surface of the fine metal mesh 41 and the top surface 55 b of the whitening protrusion 55.
Therefore, the rice milling machine according to the embodiment of the invention can effectively remove the pericarp / seed coat while securing the time for the cutting blade 29c to act on the brown rice bran layer.

Here, in the embodiment of the present invention, the whitening protrusion 55 has a linear top surface 55b facing the inner surface of the fine metal mesh 41, but the top surface 55b has an arc shape. You can also.
Even in such a case, a narrow gap of a predetermined length can be formed between the inner surface of the fine metal mesh 41 and the top surface of the whitening protrusion 55, so that the cutting blade 29c can effectively use the skin and seed coat of the brown rice. Can be removed.

FIG. 8 is a modified example of the whitening roll 43 and shows an explanatory diagram of a reference example .
The milled projections 55 provided on the milling roll 43, instead of having a straight or arc-shaped top surface 55b facing the inner surface of the pearling wire net 41, the front 55a leading end of the milling projections 55 It can also have the collar part 66 extended in the forward rotation direction of the whitening roll 43. FIG.
Even in this case, a narrow gap G having a predetermined length can be formed between the inner surface of the fine metal mesh 41 and the ridge portion 66, so that the skin and seed coat of the brown rice is effectively removed by the cutting blade 29c. can do.

FIG. 9 is an explanatory diagram of another modification of the whitening roll 43.
The rice milling machine according to the embodiment of the present invention may include a ridge 66 extending from the rear end of the top surface 55b of the whitening protrusion 55 to the rear in the forward rotation direction of the whitening roll 43.
If the ridge portion 66 extends from the rear end of the top surface 55b to the rear in the forward rotation direction of the whitening roll 43, it is possible to secure a longer time for the cutting blade 29c to act on the ridge layer of the brown rice. Therefore, it becomes possible to remove the pericarp and seed coat more effectively.

In the rice milling machine according to the embodiment of the present invention, since the annular protrusion 29 has a hemispherical side surface 29b, the side surface 29b has a gentle curved surface.
Therefore, it is possible to prevent the generation of crushed particles due to the brown rice colliding with the annular protrusion 29.

  In the rice milling machine according to the embodiment of the present invention, the milling wire 41 includes a first hole row K in which a plurality of holes 28 are linearly formed along the axial direction, a plurality of holes 28 and a plurality of the annular rings. The protrusions 29 have second hole rows L that are alternately linearly formed along the axial direction, and the first hole rows K and the second hole rows L are alternately arranged in the circumferential direction of the fine metal mesh 41. Therefore, the ridge layer removed by the action of the cutting blade 29c formed on the inner periphery of the tip of the annular protrusion 29 is surely discharged from the plurality of holes 28. Can do.

Here, in the embodiment of the present invention, the fine metal mesh 41 includes a plurality of elongated holes formed obliquely with respect to the axial direction and a plurality of the elongated holes formed between the plurality of elongated holes. An annular protrusion 29 may be provided. Further, the elongated hole and the annular projecting portion 29 can be arranged in a staggered manner, for example.
Even in this case, the ridge layer removed by the action of the cutting blade 29c formed on the inner periphery of the tip of the annular protrusion 29 can be reliably discharged from the plurality of elongated holes.

  The rice milling machine according to the embodiment of the present invention has a blast groove 65 in which the milling roll 43 is mounted on a hollow rotary shaft 42 having a plurality of blast holes 57 and communicates with the blast holes 57. Since the blast groove 65 is formed along the rear surface 55c of the whitening protrusion 55, the air ejected from the blast groove 65 is formed on the whitening roll 43 along the rear surface 55c inclined rearward. The soot layer that is ejected toward the rear in the forward rotation direction and is removed by the action of the cutting blade 29c formed on the inner periphery of the tip of the annular projecting portion 29 from the holes 28 and 29 of the fine metal mesh 41. It can be discharged efficiently.

  In the embodiment of the present invention, the whitening protrusion 55 faces the inner surface of the fine metal mesh 41 and extends rearward in the forward rotation direction of the whitening roll 43 as shown in FIGS. If it has the collar part 66, after it removes in the narrow gap G of the predetermined length formed between the inner surface of the said fine metal mesh 41, and the said collar part 66, it will disperse | distribute to the wide space behind the said collar part 66. The heel portion 66 can act as a guide to the heel layer to allow the air to act more effectively, so that the heel layer removed from the holes 28 and 29 of the heel metal mesh 41 can be more efficiently Can be discharged.

  In the above-described embodiment of the present invention, the fine metal mesh 41 is cylindrical, but it may be rectangular.

  The present invention is not limited to the above-described embodiment, and it goes without saying that the configuration can be appropriately changed without departing from the scope of the invention.

  The rice mill of the present invention can produce white rice containing a large amount of functional components.

DESCRIPTION OF SYMBOLS 1 Rice milling machine 2 Base mount 28 Hole 29 Circular protrusion part 29a Hole 29b Side surface 29c Cutting blade 3 Rice milling unit 4 Milling part 41 Milling wire 42 Main axis 43 Milling roll 44 Milling chamber 55 Milling protrusion 55a Front surface 55b Top surface 55b Rear surface 57 Jet Air hole 65 Air blast groove 66 Gutter part 7 Drive part 8 Unit mount

Claims (4)

A rice mill comprising a perforated cylinder and a milling roll rotatably disposed in the perforated cylinder, wherein a milling chamber is formed between the perforated cylinder and the milling roll,
The porous cylinder is formed with a plurality of annular projections projecting toward the inside and having a hole in the center, and a cutting blade is formed on the inner periphery of the tip of the annular projection,
The whitening roll has a front surface located on the positive rotation direction side of the whitening roll inclined backward, and a top surface facing the inner surface of the porous cylinder has a predetermined width in the circumferential direction of the whitening roll. , A whitening protrusion is provided along the axial direction in which the rear surface located on the opposite side to the positive rotation direction of the whitening roll is inclined backward .
The whitening roll is mounted on a hollow rotating shaft having a plurality of air blowing holes and has a air blowing groove communicating with the air blowing hole, and the air blowing groove is formed along the rear surface of the whitening protrusion. rice mill, characterized in Rukoto is. The milled protuberance, rice mill of claim 1 having a canopy portion extending opposite the internal surface of the porous tube from the rear end of the top surface in the normal rotation direction rear side of the milling roll. The rice mill according to claim 1 or 2 , wherein the annular protrusion has a hemispherical side surface. The rice mill according to any one of claims 1 to 3 , wherein the perforated cylinder has a plurality of holes and a plurality of the annular protrusions.

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