JP6468481B2 - Rice grain milling method and polished rice obtained by the method - Google Patents

Description

  The present invention relates to a milling method suitable for rice grains enriched with γ-aminobutyric acid (GABA) (hereinafter referred to as “GABA”) and milled rice obtained by the method.

  Traditionally, ingestion of GABA into the human body is said to be effective in preventing hypertension and improving blood flow. It is safe, secure, and simple to produce GABA from food and ingest it. Means. For example, it is known that when rice, a Japanese staple food, is germinated, nutrients such as GABA and vitamin B group are enriched without adding additives.

Moreover, the manufacturing method of the germinated germ rice described in Patent Document 1 includes a primary soaking process in which brown rice is first soaked to germinate the germ, and the brown rice that has undergone the primary soaking process has a water temperature of 60 to 70 ° C. for a predetermined time. A secondary soaking step for performing a second soaking step, a drying step for drying the brown rice that has undergone the secondary soaking step, and a rice milling step for polishing the brown rice that has undergone the drying step with a kneading accuracy of 50 to 80%. It is a feature.

  Thereby, following the primary soaking process for germinating the germ of brown rice, by performing a secondary soaking process with warm water at a water temperature of 60 to 70 ° C., the starch grains in the endosperm part are gelatinized (gelatinized), and by the primary soaking Since the cracks that have been cracked in the body are glued and the cracks in the body are repaired, the generation of crushed rice is reduced and the deterioration of the taste is prevented. Moreover, since the koji accuracy in the rice milling process is 50 to 80%, there is an action and an effect that a germinated germ rice having a high GABA content and a good taste and no odor can be produced. .

  Here, referring to the above rice milling process, in paragraphs 0017 and 0018, “the rice milling process is a process of milling germinated brown rice to remove the straw layer. The endosperm is covered with a cocoon layer.The cocoon layer, which is a hard outer skin containing the skin and seed coat, etc., tends to propagate microorganisms and also causes a strange odor (smellar odor). So-called “milled rice” is removed to obtain germinated germ rice. In addition, this rice milling process includes not only regular rice milling but also polishing rice that is performed thereafter as necessary. Is described. In paragraph 0027, “Rice milling methods include friction-type milling that peels off the cocoon layer by the frictional force between the rice and grinding-type milling that removes the outer shell by grinding to expose the endosperm. In this step, any rice milling method may be used, but in order to avoid sprouting as much as possible, it is preferable to use a grinding-type rice milling method with a small pressure load.

  However, in the method for producing germinated germ rice, the cracks in the shell are produced by the primary soaking process, the scars of the shell cracking grains are repaired by the secondary soaking process, and the rice grains are further dried by the drying process. Since moisture is reduced, severe stress / strain is applied to the rice grain structure. When such rice grains were subjected to the final rice milling process, there was a problem that even if the rice grains were refined at a low pressure, the side parts of the rice grains were excessively shaved and the endosperm part was exposed. When such rice grains are cooked, there is a concern that starch grains leak from the endosperm portion and the taste is deteriorated.

JP 2005-333829 A

  In view of the above problems, the present invention provides a rice grain milling method suitable for a rice grain enriched with GABA by suppressing excessive cutting of the side surface of the grain while suppressing germination of the germ, and the method. The technical challenge is to provide the milled rice.

In order to solve the above-mentioned problems, the present invention comprises a step of obtaining a rice cake enriched brown rice by drying after performing a rice cake enrichment treatment, and a milling step of processing the obtained rice cake enriched brown rice into polished rice. A method of scouring rice
The finening step includes a porous cylinder and a whitening roll rotatably arranged in the porous cylinder, and the porous cylinder protrudes toward the inside of the porous cylinder and has an annular protrusion having a hole in the center. A plurality of parts are formed, and a cutting blade is formed on the inner periphery of the hole at the tip of the annular protrusion ,
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. The milling is performed using a rice milling machine having a rice milling projection having a rear surface located on the opposite side to the forward rotation direction of the milling roll and inclined rearward .

Moreover, the process of obtaining the said GABA enriched brown rice is good to perform a GABA enrichment process by ventilating warm humidified air to a rice grain.

  Further, in the step of obtaining the GABA-enriched brown rice, the heated and humidified air is blown through the raw rice as a raw material, and after the treatment for enriching the content of GABA contained in the rice, it is dried and dried. What is necessary is just to suppose that the glutinous rice is removed and the GABA enriched brown rice is obtained. On the other hand, the step of obtaining the GABA-enriched brown rice is performed by ventilating heated and humidified air to the raw brown rice and performing a process for enriching the GABA content contained in the brown rice, and then drying and GABA-enriching. It is good to get brown rice.

  Then, the polished rice obtained by the rice grain scouring method removes the brown rice pericarp and seed coat by scouring with a cutting blade formed on the annular protrusion, and removes part of the paste layer and part of the germ. It has been left behind.

According to the present invention, rice grains are refined by a process of obtaining a rice cake that has been dried after the rice grains are subjected to a GABA enrichment process, and a milling process for processing the obtained GABA enriched brown rice into milled rice. In the method, the polishing step includes a porous cylinder and a whitening roll rotatably disposed in the porous cylinder, and the porous cylinder projects into the porous cylinder and has a hole in the center. And a cutting blade is formed in the inner periphery of the hole at the tip of the annular protrusion, and the whitening roll has a front surface located on the positive rotation direction side of the whitening roll. The top surface that is inclined rearward and that faces the inner surface of the perforated cylinder has a predetermined width in the circumferential direction of the whitening roll, and the rear surface that is located on the opposite side of the whitening roll in the forward rotation direction faces rearward. because doing pearling utilizing rice mill with slanted rice projections, By obtaining the catcher bar enriched rice grains, even have become rice grains brittle fragile tissue, the pearling process, by a cutting blade formed in the annular protrusion, and the protrusion for rice provided on the milling roll By finely removing the skin and seed coat with soft properties, it works effectively by gently cutting away the paste layer and germs with hard properties. As a result, it is possible to perform sperm that suppresses excessively scraping the side surface portion of the rice grain while suppressing germination of the germ, and there is no inconvenience that the endosperm portion is exposed.

  In addition, the step of obtaining the above-mentioned GABA-enriched brown rice is a wastewater treatment as compared with an GABA-enriched treatment by soaking (so-called dobu-zuke) when the heated and humidified air is passed through the rice grains. Has the advantage that the amount of water used can be significantly reduced and the energy cost required for drying rice grains can be greatly reduced. Further, in the step of obtaining the GABA-enriched brown rice, the heated and humidified air is blown through the raw rice as a raw material, and after the treatment for enriching the content of GABA contained in the rice, it is dried and dried. Drying after removing the glutinous rice to obtain the GABA-enriched brown rice, or by passing heated and humidified air to the raw brown rice to enrich the GABA content contained in the brown rice As a result, gab-enriched brown rice can be obtained, so that brown rice or brown rice can be appropriately selected as a starting material.

  Further, the polished rice obtained by the rice grain milling method removes the peel and seed coat of brown rice by milling with a cutting blade formed on the annular projecting portion. Since the portion is the remaining polished rice, it is possible to obtain polished rice containing a large amount of functional components such as vitamin B1 (thiamine), vitamin B6 and vitamin E (α-tocopherol) in addition to GABA.

It is a flowchart which shows each process in one Embodiment of the finening method of this invention. (A) is a sticky rice, (B) is a GABA enriched sticky rice, (C) is sectional drawing which shows each structure of brown rice. It is sectional drawing which shows the structure of GABA enriched brown rice. It is a flowchart which shows each process in one Embodiment of the finening method of this invention. It is a partially broken sectional view of a rice mill suitable for the milling method of the present invention. It is AA sectional drawing of FIG. It is a detailed explanatory view of a fine metal mesh. (A) is BB sectional drawing of FIG. 7, (b) is CC sectional drawing of FIG. It is a schematic diagram of polished rice obtained by the milling method of the present invention.

Embodiments of the present invention will be described with reference to the drawings. In addition, it is not limited by these embodiment, It can implement with a various form, without changing the summary of invention.

The rice grain milling method according to the present invention includes two methods, one using rice as the starting material shown in FIG. 1 and one using brown rice as the starting material shown in FIG.

  The milling method using the starting material of FIG. 1 as glutinous rice prepares glutinous rice having a moisture content of 14% to 16% as a raw material (S1), and humidified hot air so that the moisture content is in the range of 16 to 22%. After ventilating and performing the process (S2) for enriching the content of the GABA contained in the glutinous rice, the glutinous rice is dried to a predetermined moisture (S3), and then the glutinous rice is removed to remove brown rice. Obtained (S4), and thereafter, the brown rice is supplied to a milling apparatus and subjected to milling (S5) to obtain refined rice enriched with a GABA (S6). In addition, although the means which ventilates humidified warm air was employ | adopted as a process which enriches the content of the said GABA, it is not restricted to this, The GABA enrichment process (so-called soup pickles) by immersion can be selected suitably. . However, in consideration of the amount of water used and the energy cost required for drying, it is preferable to adopt a means for passing humidified warm air.

As shown in the broken view of the rice grain in FIG. 2 (A), the raw rice that is the raw material is a rice husk 13 that is the outermost layer in which brown rice made of endosperm 10, cocoon layer 11 and germ 12 is embedded. . The brown rice is composed of the endosperm 10, the cocoon layer 11 covering the surface of the endosperm 10, and the germ 12 fixed to the base side of the endosperm 10. Reference numeral 14 denotes a gei that is formed by a part of the floret of rice florets and is detached together with the chaff 13 during the deflation process.

A humidified hot air is passed through such glutinous rice, and then left for 2 to 25 hours to enrich the content of the GABA contained in the glutinous rice ((S2) in FIG. 1). If it does, as shown in the fracture | rupture figure of the rice grain of FIG. 2 (B), the germ 12 will expand | swell gradually in the shape of a pigeon breast, and will be in the state just before germination. At this time, since the moisture of the rice is too high, it is dried to a predetermined moisture, for example, 15 to 16% by hot air or the like ((S3) in FIG. 1).
The humidified warm air is passed through the glutinous rice using, for example, a hydrodrying apparatus having a structure almost similar to that of a general circulation type grain dryer. The temperature of the humidified air is 65 to 70 ° C. and the humidity is 90 ° C. -98%.
The standing time is adjusted in the range of 2 to 25 hours, preferably 8 to 12 hours, and more preferably 9 to 11 hours. As a result, the GABA enriched with the germ 12 penetrates into the endosperm 10.

Since the dried rice 12 in which the germ 12 has expanded into a pigeon breast shape is covered with the rice husk 13, the rice husk 13 is removed by a defluxing process ((S4) in FIG. 1) to obtain brown rice (FIG. 3 (brown rice). (See the cross-sectional view). The rice huller used for the dehulling process is a roll-type hulling machine using a pair of rubber rolls (dehulling rolls) by the action of detaching the rice husk, an impeller that accelerates the hulls and a rubber plate. Although it is roughly classified into an impact-type hulling machine using a plate, any hulling machine may be used in this processing.

As shown in FIG. 3, the surface of the endosperm 10 is covered with the cocoon layer 11 and the germ 12 is fixed to the base side of the endosperm 10 so that the brown rice is fermented by sperm treatment ((S5) in FIG. 1). Part of the layer 11 and the germ 12 is removed, and it is necessary to process into polished rice with improved digestion and absorption and taste ((S6 in FIG. 1)). At this time, since the GABA component generated from the germ 12 is also transferred to the endosperm 10 side and enriched, there is no problem that the GABA component is extremely reduced by removing a part of the germ 12. However, since the germ 12 contains abundant proteins, fats, vitamins, minerals, and the like other than GABA, it is better not to sprouting the germ 12 but to semen so as to leave a part.

Moreover, the cocoon layer 11 is formed from the outer skin 15, the seed coat 16, and the paste powder layer 17 from the outside, as shown in the enlarged view of part A of FIG. 3, and is rich in vitamin B1, vitamin B6, and vitamin E. Yes. Therefore, in order to obtain polished rice containing a large amount of these nutritional components, it is necessary to perform a milling process that completely removes the peel 15 and the seed coat 16 that are poorly digested and absorbed and leaves a part of the paste layer 17.

However, since the thickness of the rice bran layer 11 is generally different at the abdomen, side and back of the rice grain, when the rice milling process is performed with a conventional friction rice mill or grinding rice mill, the paste layer 17 is exceeded. Then, part of the endosperm 10 is shaved, and when cooking rice, starch granules leak out from the endosperm part, and there is a concern that the taste deteriorates. Therefore, in the main milling process (step (S5) in FIG. 1), the type of the rice milling machine, which is different from the conventional machine, that is, the screen net of the milling cylinder has a large number of rings toward the inside of the milling chamber. It is preferable to use a rice mill (see FIG. 5) in which a protrusion is formed and a cutting blade is formed on the inner periphery of the tip of the annular protrusion.

On the other hand, as shown in FIG. 4, the milling method using brown rice as the starting material prepares brown rice having a moisture content of 10 to 15% (S11), and the brown rice has a range of 16 to 19%. The humidified warm air is ventilated as described above, and the processing (S12) for enriching the content of the GABA contained in the brown rice is performed, and then the brown rice is dried to a predetermined moisture (S13). And then refined (S14) to obtain a refined polished rice (S15).

As shown in the cross-sectional view of the rice grain of FIG. 2 (C), the brown rice used as a raw material is composed of endosperm 10, a cocoon layer 11 covering the surface of the endosperm 10, and an embryo 12 fixed to the base side of the endosperm 10. It is what is done.

When humidified warm air is passed through such brown rice and the process of enriching the content of GABA contained in the brown rice ((S12) in FIG. 4) is performed, as shown in FIG. It becomes brown rice just before germination that expands like a pigeon chest. Since moisture is high in this state, drying is then performed to a predetermined moisture, for example, 15 to 16% by hot air or the like ((S13) in FIG. 4).

Next, scouring is performed to remove a portion of the brown rice straw layer 11 and germ 12 ((S14) in FIG. 4). In this milling process, as in the milling method using the starting material as the milled rice, the screen mesh of the milling grains is formed with a number of annular projections toward the inside of the whitening chamber, and the inside of the tip of the annular projection is It is preferable to use a rice mill (see FIG. 5) having a cutting blade formed on the periphery.

FIG. 5 is a partial cross-sectional view of a rice mill suitable for the main milling process. This rice milling machine 20 is a horizontal axis type rice milling machine formed by placing a rice milling unit 22 on a base frame 21.

The rice milling unit 22 has a cylindrical milled metal mesh 23 and a milling roll 25 that is mounted on the main shaft 24 and rotatably disposed in the milled metal mesh 23. A sperm chamber 26 is formed between them to form a sperm part 27. In the milling unit 27, a raw material supply unit is provided on one end side of the milling chamber 26, and a rice grain discharge unit is provided on the other end side. The raw material supply unit includes a raw material supply cylinder 29 having a raw material supply port 28 and a raw material hopper 30 disposed in the raw material supply port 28. Further, a spiral roll 31 that is mounted on the main shaft 24 and driven to rotate is disposed in the raw material supply cylinder 29.

The rice grain discharge unit includes a cylindrical rice grain discharge cylinder 33 having a rice grain discharge port 32 and a rice grain discharge basket 34 disposed at an outer position corresponding to the rice grain discharge port 32. The rice grain discharge rod 34 is provided with a resistance lid (compression plate) 36 that is energized by a resistance weight (weight) 35 to close the rice grain discharge port 32.

The milling roll 25 is provided with a rice milling projection 37 corresponding to the position of the milling chamber 26, and a rice grain discharging projection 38 corresponding to the position of the rice grain discharge cylinder 33.

The whitening roll 25 is mounted in a hollow portion of the main shaft 24. A plurality of blast holes 39 are formed in the hollow portion of the main shaft 24, and a blower fan 40 communicating with the hollow portion is connected to one end side of the main shaft 24.

Connected to the other end of the main shaft 24 is a driven pulley 41 connected by a drive pulley (not shown) of a drive motor (not shown) and a belt (not shown).

A collection chamber 42 is formed around the collection chamber 26, and the collection chamber 42 communicates with a collection duct 43 provided below. Further, a residual rice removing air nozzle 44 is disposed on one end side of the milling chamber 26 and below the raw material supply cylinder 29.

FIG. 6 is a cross-sectional view taken along the line AA in the fine part of FIG. FIG. 7 shows a detailed explanatory view of a fine metal mesh. 8 shows a BB cross-sectional view of FIG. 7 and a CC cross-sectional view of FIG.
As shown in FIG. 6, in the embodiment of the present invention, the fine metal mesh 23 is formed in a cylindrical shape by combining two mesh plates 23a, 23b having a large number of holes as a semicircular arc shape.

As shown in FIGS. 6 and 7, a plurality of resistance members 45 are attached to the inner surfaces of the mesh plates 23a, 23b toward the semen chamber 26, and the resistance members 45 have a semen chamber. 26 has a function of promoting the friction of the grains of rice grains in the interior. The mesh plates 23a and 23b are formed with a plurality of annular protrusions 46 as a continuous pattern shape of the mesh plates 23a and 23b. The annular projecting portions 46 project toward the semen chamber 26 and have a hole 46a at the center.
Further, the annular protrusion 46 has a side surface 46b formed of a hemispherical gentle curved surface, and a cutting blade 46c is formed on the inner periphery of the tip.

In the embodiment of the present invention, the mesh plates 23a and 23b include a first hole row D in which a plurality of long holes 47 and the plurality of annular projecting portions 46 are alternately arranged linearly along the axial direction. And the 2nd hole row | line | column E by which the some long hole 47 is arrange | positioned in zigzag form along an axial direction is alternately arrange | positioned in the circumferential direction, and a continuous pattern shape is formed.

Here, the fine metal meshes 23a and 23b can be formed by, for example, a well-known punching process, press process or shot peening process using a metal plate as a plate material.
In addition, here, the fine metal mesh 23 is configured by combining two mesh plates 23a and 23b, but it is configured by one mesh plate or by combining three or more mesh plates. You can also

As shown in FIG. 6, in the embodiment of the present invention, two projections 37 for rice milling are provided along the axial direction so as to form a pair. The rice milling protrusion 37 is formed such that a front surface 37a located on the positive rotation direction side of the whitening roll 25 is inclined rearward.

The rice milling protrusion 37 has a linear top surface 37 b facing the inner surface of the milled metal net 23, and the top surface 37 b has a predetermined width of the whitening roll 25.
Further, the rice milling protrusion 37 is formed such that a rear surface 37c located on the opposite side to the normal rotation direction of the whitening roll 25 is inclined rearward similarly to the front surface 37a.

A blast groove 48 is formed in the milling roll 25 along the rear surface 37 c of the rice milling protrusion 37.
The blast groove 48 formed in the whitening roll 25 communicates with a plurality of blast holes 39 formed in the hollow portion of the main shaft 24 to which the whitening roll 25 is mounted.

In the rice milling machine according to the embodiment of the present invention, the unpolished brown rice (gaba-enriched unpolished rice) fed into the raw material hopper 30 is supplied from the raw material supply port 28 into the raw material supply cylinder 29, and then the The spiral roll 31 is sent to the semen chamber 26.

The GABA-enriched brown rice moves toward the rice grain discharge cylinder 33 while being refined (milled) in the milling chamber 26. Then, after the gab enriched brown rice is refined, it receives the action of the rice grain discharge projections 38 provided on the whitening roll 25 and pushes the resistance lid 36 provided at the peripheral surface position of the rice grain discharge cylinder 33. It is opened and discharged from the rice grain outlet 32 to the rice grain outlet 34.

  At that time, due to the action of the blower fan 40, air is ejected from a blast groove 48 formed in the whitening roll 25 through a plurality of blast holes 39 formed in the hollow portion of the main shaft 24, and The soot generated in the chamber 26 is discharged from the holes 46 a and 47 formed in the fine metal mesh 41 to the collecting chamber 42.

<Example 1>
Next, in order to confirm the effect of the rice milling machine according to the embodiment of the present invention, two kinds of glutinous rice, Hiroshima Hinohikari (variety name) produced in 2014 and Yumepirika (variety name) produced in 2012 in Hokkaido were used. The experiment was conducted using this. The initial Gabba value of Hiroshima Hinohikari which was the test bowl was 3.5 mg in 100 g (dry base, hereinafter the same). Also. The initial Gabba value of Hokkaido dream meka, which is the test bowl, was 3.1 mg per 100 g. These were subjected to the steps S1 to S4 of FIG. 1 to obtain GABA-enriched brown rice.

It experimented whether the quality of milled rice produced a difference with the case where it refines with the rice mill in Embodiment of this invention with respect to the said GABA enriched brown rice, and the case where it refines with the conventional rice mill.

Table 1 shows milled rice (hereinafter referred to as “new milled rice”) polished with a milling machine in the embodiment of the present invention, and a commercially available friction-type milling machine (Millmore manufactured by Satake Co., Ltd. (model number: HRP25A)). We compared the cava value and other functional ingredients contained in each polished rice (hereinafter referred to as “normally polished rice”).
In addition, it was speculated that the newly refined rice and the ordinary polished rice obtained by the experiment were subjected to the milling in which the pericarp, seed coat and paste layer were uniformly removed.

As shown in Table 1, from the analysis results of Hinohikari from Hiroshima and Yumepirika from Hokkaido, both varieties had almost the same value when compared with newly polished rice and normal polished rice. However, the values of vitamin B1 (thiamine), vitamin B6 and vitamin E (α-tocopherol) were slightly higher in freshly polished rice.

In general, it is known that functional components such as vitamin B1, vitamin B6, and vitamin E contained in brown rice are contained in a large amount in the pericarp and seed coat in the straw layer of brown rice. Therefore, it is speculated that the normal milled rice in the above experimental results is excessively refined with the pericarp, seed coat and paste layer being removed cleanly, and the side surface of the rice grain being excessively shaved until the endosperm part is exposed. The On the other hand, for freshly polished rice, the peel and seed coat are removed, but it is speculated that a part of the paste layer remains, and functions such as vitamin B1 (thiamine), vitamin B6 and vitamin E (α-tocopherol) It is thought that it shows that there are a lot of sex components in comparison with ordinary polished rice.

<Example 2>
Next, an experiment was conducted in the same manner as described above when the starting material was brown rice. The initial GABA value of the Hiroshima-grown Hinohikari in 2011, which is the test brown rice, was 3.3 mg per 100 g. This was processed through steps S11 to S13 in FIG.

It experimented whether the quality of milled rice produced a difference with the case where it refines with the rice mill in Embodiment of this invention with respect to the said GABA enriched brown rice, and the case where it refines with the conventional rice mill.

Table 2 shows milled rice (hereinafter referred to as “new milled rice”) polished by the milling machine in the embodiment of the present invention, and a commercially available friction-type milling machine (Matmore manufactured by Satake Co., Ltd. (model number: HRP25A)). We compared the cava value and other functional ingredients contained in each polished rice (hereinafter referred to as “normally polished rice”).

As shown in Table 2, when new polished rice and ordinary polished rice were compared, the GABA values were almost equivalent, but the values of vitamin B1 (thiamine), vitamin B6 and vitamin E (α-tocopherol) As for, newly refined rice was slightly higher, though slightly.

The normal polished rice in the above experimental results is presumed to be overly refined as in Example 1. On the other hand, the fresh polished rice removes the skin and seed coat, but part of the paste powder layer. Presumed to remain, it is thought that it shows that there are more functional ingredients than ordinary polished rice.

5 to 8, the brown rice supplied to the milling chamber 26 is directed toward the inner surface of the milled wire net 23 by the front surface 37a of the milling projection 37, and the annular projection 46 The wrinkles are removed by the action of the cutting blade 46c formed on the inner periphery of the tip.
At this time, the brown rice bran layer has a soft property in which the pericarp and seed coat are fibrous, and the paste powder layer has a hard property having granular aggregates and cell walls. The blade 46c effectively acts on the soft skin and seed coat.

Further, in the GABA enrichment treatment shown in the embodiment of the present invention, the rice grain is subjected to a process of enriching the content of GABA contained in the rice grain by passing humidified hot air through the rice grain, and then the rice grain is subjected to a predetermined moisture content. The process of drying is performed. Such water hydration (additional absorption) treatment and moisture reduction (dehydration drying) treatment on rice grains may have severe stress and strain applied to the rice grain structure. And it is estimated that the rice grain structure itself is brittle and fragile.
When scouring the rice grains after such a GABA enrichment treatment, the cutting blade 46c formed on the annular protrusion 46 removes the soft skin and seed coat, and the hard paste layer and germ. It works effectively by gently carving out part of it.

That is, when the rice milling machine shown in the embodiment of the present invention is used for milling, there is no problem that the side surface part of the rice grain is excessively shaved and the endosperm part is exposed unlike the conventional rice milling machine.

  The present invention can be applied not only to rice milling but also to milling of wheat, millet, millet, millet, beans, and other minor grains.

DESCRIPTION OF SYMBOLS 10 Endosperm 11 Grain layer 12 Embryo 13 Rice husk 14 Protection 15 Fruit skin 16 Seed coat 17 Paste layer 20 Rice milling machine 21 Base frame 22 Rice milling unit 23 Rice milling wire 24 Spindle 25 Milling roll 26 Rice milling room 27 Milling part 28 Raw material supply port 29 Raw material supply Tube 30 Raw material hopper 31 Spiral roll 32 Rice grain discharge port 33 Rice grain discharge tube 34 Rice grain discharge rod 35 Resistance weight (weight)
36 Resistance lid (compression plate)
37 Rice milling projection 38 Rice grain discharging projection 39 Blow hole 40 Blower fan 41 Driven pulley 42 Gathering chamber 43 Gathering duct 44 Residual rice removal air nozzle 45 Resistance member 46 Toroidal protrusion 47 Long hole 48 Blast groove

Claims (4)

A rice grain scouring method comprising a step of drying a rice grain after it is subjected to a GABA enrichment process to obtain a GABA enriched brown rice, and a milling process of processing the obtained GABA enriched brown rice into polished rice,
The finening step includes a porous cylinder and a whitening roll rotatably arranged in the porous cylinder, and the porous cylinder protrudes toward the inside of the porous cylinder and has an annular protrusion having a hole in the center. A plurality of parts are formed, and a cutting blade is formed on the inner periphery of the hole at the tip of the annular protrusion ,
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 rice grain milling method, wherein rice milling is performed using a rice milling machine having a rice milling projection having a rear surface located on the opposite side to the forward rotation direction of the milling roll and inclined rearward .   The method for scouring rice grains according to claim 1, wherein the step of obtaining the GABA-enriched brown rice is performed by supplying warm and humid air to the rice grains and performing a GABA enrichment process.   The step of obtaining the GABA-enriched brown rice is a process of enriching the content of GABA contained in the glutinous rice by passing warmed humidified air to the glutinous rice as a raw material, and drying the dried glutinous rice. The method for scouring rice grains according to claim 1, wherein the unpolished rice is obtained by depressurization.   The step of obtaining the GABA-enriched brown rice is performed by ventilating heated and humidified air to the raw brown rice as a raw material, performing a treatment for enriching the GABA content contained in the brown rice, and drying to obtain the GABA-enriched brown rice. The method for pulverizing rice grains according to claim 1 to be obtained.

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