JP2002320864A - Rice milling method and rice mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the bran sticking to polished rice after rice milling by utilization of a rice mill by circulation. SOLUTION: This rice mill consists of means of metering the unpolished rice supplied from a rice milling tank 16 to a cleaning chamber, a cleaning device 12 for cleaning the unpolished rice under a prescribed pressure in the cleaning chamber, storage means for temporarily storing the clean rice from the cleaning chamber and reducing means for reducing the stored clean rice to the rice milling tank 16. A control section 34 which activates the reducing means and changes and controls the pressure in the cleaning chamber to the prescribed low pressure by cleaning pressure setting means for changing and controlling the cleaning pressure of the cleaning chamber is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing rice bran adhering to polished white rice.

[0002]

2. Description of the Related Art In a conventional rice milling device, a strong sorting wind is applied to a discharge passage of white rice discharged from a rice milling machine for whitening brown rice to separate mainly bran adhering to the surface of white rice. There is. In this known configuration, the sorting air is applied to the brown rice flowing down or being conveyed by air, and a porous body capable of applying the sorting air to the cylindrical body discharged from the brown rice is interposed.

[0003]

However, there is a drawback in that the bran tends to adhere to the porous body portion, causing clogging there, and as a result, the action of the sorting wind falls to the limit, resulting in poor accuracy of the bran separation. is there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and has taken the following technical means. That is, the invention according to claim 1 is provided with a rice milling apparatus having a milling chamber for milling brown rice sequentially fed from a milling hopper, and reducing the white rice discharged from the milling chamber outlet to the milling tank. Means are provided, and a reduced rice mill is supplied to the milling chamber again, and the milled rice is processed at a predetermined low pressure. As a result, the grains supplied to the rice polishing tank are supplied to the rice polishing device, and are subjected to a whitening operation so as to achieve the set whiteness. Then, the polished white rice is returned to the polished rice tank again, and the polished rice is subjected to polished rice processing at a predetermined low pressure. By this polished rice treatment, the bran on the surface of the white rice can be removed, and the rice is appropriately collected. Therefore, it is possible to remove the bran that still adheres after the whitening treatment. Further, the invention according to claim 2 is a means for measuring brown rice supplied from a rice hopper to a polishing chamber, a polishing apparatus for performing a polishing process under a predetermined pressure in the polishing chamber, and a method for temporarily transferring white rice from the polishing chamber. It consists of a storage means for storing, and a reducing means for reducing the stored white rice to the milling hopper, and operates the reducing means and changes the whitening pressure of the whitening chamber based on the detection result of the means for detecting the completion of rice polishing. It is characterized in that a control unit for changing and controlling the pressure in the whitening chamber to a predetermined low pressure by the whitening pressure setting means to be controlled is constituted. As a result, similarly to the above, the grains supplied to the rice mill tank are supplied to the rice mill, and are subjected to the whitening action to achieve the set whiteness. Then, the polished white rice is temporarily stored by the storage means, and upon detection of the completion of the polished rice, the polished rice is returned to the polished rice tank again to perform the polished rice processing at the polished pressure set to a predetermined low pressure. By this polished rice treatment, the bran on the surface of the white rice can be removed, and the rice is appropriately collected. Therefore, the bran still adhering after the whitening treatment can be removed.

[0005]

According to the first aspect of the present invention, it is possible to remove bran adhering to the surface of white rice, to provide delicious polished rice, and to suppress old rice. According to the second aspect of the present invention, in addition to having the above-mentioned effects, it is possible to detect the completion of polishing and continuously process the stored polished rice to perform polished rice processing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the internal structure of a building viewed from the plane of a rice milling mill facility.
And is divided into an operation room 2 and a machine room 3. On the operation room 2 side, a grain bag holder 4, an operation panel 5, a white rice tank 6
And the like, and the inlet of the raw material input hopper 7 is faced. On the machine room side 3, a destoner 8, a destoner 9, a foreign matter removing device 10, a rice mill elevator 11, a rice mill 12, A bran processing unit 13, an opening / closing door 14, and the like are provided.

FIG. 2 is a view showing the working process of a rice mill.
The lower part of the raw material charging tank 7 is
The rotary valve 15 which feeds out the grain thrown in is provided. The payout side of the rotary valve 15 is communicated with the hopper 8a of the destoner elevator 8, and the discharge port 8b of the destoner elevator 8 is supplied with a relatively small amount of stones or the like contained in the introduced grains. It faces the input port 9a side of the destoning device 9 for sorting and removing foreign substances having a large specific gravity.

[0008] The foreign matter removing device 10 is for removing straw wastes and the like contained in the inputted grains while sorting and separating the same.
The discharge port 10b of the foreign matter removing device 10
To the hopper section 11a of the rice mill elevating machine 11 respectively. Outlet 11 of the lift 11 for the rice mill
b is configured to face the rice polishing tank 16, and further, below the rice polishing tank 16, a rice polishing device 12 that performs a whitening treatment on grains is disposed.

Reference numeral 17 denotes a machine room-side rice bran conveying path for air-conveying the rice bran generated by the whitening process in the rice milling device 12, and is connected to the rice bran processing section 13.

The bran processing unit 13 includes a cyclone 18, a bran spiral 19 for horizontally transferring bran dropped from the cyclone 18,
A bran helical drive motor 20 for driving the bran helical 19, a bran transfer gutter 21 containing the bran helical 19, and a plurality of bran for discharging the bran discharged from the bran discharge ports 21a and 21b before and after the transfer of the bran transfer gutter 21. Are provided with rice bran bags 22a and 22b.

As shown in FIG. 3, the operation panel 5 has a coin insertion slot 30, a bill insertion slot 31, a sticky selection button 32, and a whiteness selection button 33 (in this embodiment, upper white / standard / 8). (Can be selected in three stages). The operation panel 5 is provided with a microcomputer for controlling the drive motors of the respective parts in sequence.

As shown in FIG. 4, a control unit 34 of the microcomputer includes a coin sensor 35 and bill detecting means 36.
, The whiteness selection information from the whiteness selection button 33, the selection information by the mochi selection button 32, and the like. On the other hand, the control signal to the rotary valve drive motor 37, the drive of the elevator drive device 38 for the destoner / rice milling device, the drive motor 39 of the destoner, the rice mill drive motor 40, the bran spiral drive motor 20, and the driving of the foreign matter removing device 10 A motor or the like is output.

More specifically, the milling apparatus 12 has a milling chamber 12a below the milling tank 16, and a milling roll 41 inclined downward is provided in the milling chamber 12a. The outlet of the refining chamber 12a is closed by a compression plate 42, and the compression degree of the compression plate 42
This is a configuration that can be adjusted and set in accordance with the forward / reverse rotation of No. 3. Brown rice supplied to the space between the milling roll 41 and the bran net 44 has a structure in which the surface of the brown rice is peeled between them to become milled rice, and the pressing plate 42 is pushed open to flow down the discharge chute 45. Reference numeral 46 denotes a pulley that is linked to the rice-milling apparatus driving motor 40, and has a structure that can link the milling roll 41.

A switching shutter 47 is provided in the middle of the discharge chute section 45, and a white rice tank 48 or a white rice storage section 49 is provided.
Is selectively supplied to the power supply. White rice tank 4
Reference numeral 8 denotes a take-out take-out tank, which allows a user to take out white rice in the tank 48 with a storage bag attached thereto and take it home. On the other hand, the white rice storage unit 49 can store white rice in a predetermined state by closing the shutter 50. When the shutter 50 is opened, the white rice storage unit 49 can return and supply the white rice to the hopper 11a of the rice mill elevator 11. The path switching control of the switching shutter 47 and the opening / closing control of the shutter 50 are performed by the control unit 34. The absence of grains in the input tank 7 is detected by the sensor 51 for detecting the stop of the rotary valve 15 and the absence of grains by the grain presence / absence sensor 52 provided at a lower position of the rice polishing tank 16, and the grain is detected from the start of operation. The processed brown rice amount g is calculated based on the elapsed time t until the absence is detected. Thereafter, the shutter 16a at the lower portion of the rice polishing tank 16 is opened to perform the whitening processing for a predetermined time T. The white rice is returned to the rice milling elevator 11 via the white rice storage unit 49 and returned to the rice polishing tank 16 again. At this time, the white rice storage unit 49 is used so that the brown rice before the whitening processing and the reduced white rice subjected to the whitening processing are not mixed.
Is stored for a predetermined time. Reduced white rice is
Rice polishing is performed in a state where the polishing pressure is set low (FIG. 6).

After the rice polishing, the switching rice 47
Is discharged to the white rice tank.

Next, the working process of the rice mill will be described. The operator puts the grains serving as the raw material into the raw material charging tank 7 on the operation room 2 side. Then, coins or bills sufficient to secure the operation time corresponding to the grain amount are inserted into the coin mech insertion port 30 or 31. next,
When any one of the whiteness selection buttons 33 is selected to set the whiteness, the whiteness adjustment motor (not shown) is operated to set the position of the compression plate of the discharge unit of the rice polishing apparatus 12 to achieve a predetermined whitening pressure. When these setting preparations are completed, the control unit 34 reads the number of inserted coins, calculates the operation time, and the respective units of the milling facility start operation over the calculated time.

The grains charged into the raw material charging tank 5 are supplied to the lifting device 8 for the destoning device by the rotary valve 15, are grained by the lifting device 8 for the destoning device, and fall into the destoning device 9. The grains dropped into the stone removing device 9 are supplied to the swinging side of the swing sorting plate. In the meantime, the pebbles and foreign matters in the grains are sorted and conveyed to the rocking side by the rocking operation of the rocking sorting plate and the blowing from the blower fan, and are stored in the stone storage chamber via the stone discharge chute. On the other hand, the grains flow down to the swinging side of the swing sorting plate, and are dropped and supplied to the supply hopper of the foreign matter removing device 10 from the grain discharge port 9b.

From the grains supplied to the foreign matter removing device 10,
Impurities such as straw waste are separated and sorted, and are discharged from the discharge port cylinder 50 to a foreign substance storage chamber (not shown).

The grains supplied to the brown rice tank 16 are supplied to the rice milling device 12, and are subjected to a whitening operation so that the whiteness is set between the whitening roll and the fine platinum net. Then, the polished white rice is returned to the polished rice tank 16 again, and the polished rice is subjected to polished rice processing at a predetermined low pressure. By this polishing rice treatment, the bran on the surface of the white rice can be removed, and the rice is collected in the operation room 2 as appropriate.

The bran and the like generated during the whitening operation are conveyed by air to the bran processing section 13 through a bran conveying path by a suction / blowing operation of a conveying fan (not shown), and are passed through a cyclone 18 and a bran spiral 19 to a bran bag 22a. -Collected in 22b. Alternatively, when switching is performed by a switching valve (not shown), the liquid is taken out through the cyclone 18 at the take-out part on the operation room 2 side. When the time set by the input amount elapses, each unit in the milling facility stops.

The above rice milling device 12 can reduce residual grains by employing the following rice milling method. That is, rice milling device 1
A whiteness sensor 55 is provided immediately before the switching shutter 47 in the middle of the return path from the discharge port 2 to the rice mill elevating machine 11, and based on the detection results of the whiteness sensor 55 at the start and the end of rice polishing. The shutter 47 is switched from the return to the outside take-out side.

When the rice polishing operation is started, first, the switching shutter 47 is switched to the reduction side to start the rice polishing operation. While being confirmed by the whiteness sensor 55 that the grains from the white rice discharge port are still in an unrefined state, the grains shift to the reduction side, that is, the grain circulation side. When the control unit 34 confirms that the detection from the whiteness sensor 55 has reached a predetermined whiteness, a switching signal is output to the switching shutter 47, discharged to the white rice tank 48 side, and can be taken out in a predetermined manner. This prevents the discharge of unpolished grains.

Next, when the sensor 51 of the raw material charging tank 7 detects that there is no raw material by stopping the rotary valve 15 just before the end of the rice polishing, the process shifts to a remaining rice processing step by the destoning device 9, and during this processing period, the rice polishing tank 16 The amount of the final circulation is confirmed by the amount detection sensor 56 provided in the above, the switching shutter 47 is switched to the reduction side, that is, the circulation processing side, and the circulating rice is executed. When a predetermined degree of whiteness is obtained after waiting for the detection result from the whiteness sensor 55, the compression plate 42 is moved backward until the discharge port is opened, and the remaining rice inside is discharged by its own weight. In this way, it is possible to eliminate the residual grains remaining as unpolished grains at the end of the work, to completely refine the grains and to return them to the customer.

FIG. 7 shows an outline of the hulling rice milling facility, and the same components as those of the brown rice processing milling facility of FIG. 2 are indicated by the same reference numerals. The raw material paddy enters the hulling device 61 from the raw material input tank 7 via the hulling device elevator 60, and
This is a configuration in which the rice is hulled by a crushing roll of No. 1 and is subjected to a wind-selection process into rice mixed with rice husks and brown rice. Reference numeral 62 denotes a rice husk discharge duct, and reference numeral 63 denotes a guide path for supplying the rice husk elevator 11 and the rice polishing apparatus 12.

Reference numeral 64 denotes a machine room-side rice bran transport path for air-transporting a mixture of bran and rice husk powder generated by the whitening process in the rice milling device 12, and is connected to a rice bran / rice husk powder processing unit 65. The bran / rice husk flour processing unit 65 includes two cyclones 66, 6
7. A rice husk powder tank 68 for storing rice husk powder dropped from the cyclone 66 and a rice bran tank 69 for storing rice bran dropped from the cyclone 67 are provided. Further, a rice hull spiral 70 for horizontally transferring rice husk powder from the rice husk powder tank 68 and a rice bran spiral 71 for horizontally transporting rice bran dropped from the rice bran tank are provided, and both spirals 70 and 71 are provided so as to face each other coaxially. The rice husk powder and the bran are mixed and supplied to a common feed spiral 72 at a fixed ratio. The feed spiral 72 is configured to supply to a compressor (not shown). 73 and 74 are drive motors.

The two cyclones 66 and 67 are, for example, tangential inflow type standard cyclones.
The second cyclone 67 connected to the first cyclone 66 in series connects the first cyclone 66 to catch and drop the rice bran.

In general, the cyclone is affected by the size of dust particles even in the dust collection efficiency. Conversely, the form of the cyclone, for example, the diameter of the cylindrical portion of the cyclone, the diameter of the outlet tube thereof, the overall height thereof, the tangential inflow velocity, and the like are determined based on the difference in the particle diameter, and the two cyclones 66 and 67 are connected in series as described above. However, different dust, rice husk flour and bran are separately captured.

In order to mix rice husk powder and bran in predetermined amounts in separate tanks 68 and 69, the spiral
And 71 interposed, for example, to produce a firewood fuel alternative. It is mixed at a predetermined ratio, compressed and molded into a rod shape. An ignition material (made of cotton, for example) impregnated with waste oil or the like is inserted into the center of the molded product 75, and the outer periphery is covered with polyethylene 77. Do it. It can provide wood stove fuel that burns for a long time without soiling your hands.

[Brief description of the drawings]

FIG. 1 is a plan view showing each part of an apparatus in a rice polishing facility.

Fig. 2 Work process diagram of rice mill

FIG. 3 is a front view showing the operation panel

FIG. 4 is a block diagram.

FIG. 5 is a side sectional view of the rice polishing apparatus.

FIG. 6 is a flowchart.

FIG. 7: Work process diagram of the rice milling facility

FIG. 8 is a side view of a rice husk / bran molded product.

[Explanation of symbols]

1 ... partition wall, 2 ... operation room, 3 ... machine room, 4 ... bag stand,
5 operation panel, 6 white rice tank, 7 raw material input tank, 8
... stone disconnect device for elevators, 9 ... stone disconnect device, 10 ... foreign matter removing apparatus, 11 ... rice apparatus for elevators, 12 ... rice apparatus, 13 ...
Rice bran treatment part, 14 ... door, 15 ... rotary valve, 16
... Brown rice tank, 17 ... Branch transport path on the machine room side, 18 ... Cyclone, 19 ... Nuka spiral, 20 ... Nuka spiral drive motor,
21 ... Bran transfer trough, 22a / 22b ... Bran bag, 30 ... Coin slot, 31 ... Bill insertion slot, 32 ... Money selection button, 3
3 ... whiteness selection button, 34 ... control unit, 41 ... whitening roll, 42 ... pressing plate, 43 ... whitening motor, 44 ...
45: discharge chute, 47: switching shutter, 48: white rice tank, 49: white rice storage unit, 50: shutter, 51: sensor, 52: sensor

Continuation of the front page (72) Inventor Tsutomu Takahashi 1-Yakukura, Tobe-cho, Iyo-gun, Ehime Pref.

Claims (2)

[Claims] A rice mill having a milling chamber for milling brown rice sequentially fed from a milling tank is provided, and reducing means for reducing the white rice discharged from the milling chamber outlet to the milling tank is provided. A method of polishing rice that is supplied to the polishing room again and the rice is polished at a predetermined low pressure. 2. A means for measuring brown rice supplied from a milling tank to a milling chamber, a milling apparatus for milling under a predetermined pressure in the milling chamber, and a storage means for temporarily storing milled rice from the milling chamber. Refining means for reducing the stored white rice to the rice polishing tank, based on the detection result of the means for detecting the presence or absence of the completion of rice polishing, operates the reducing means, and changes and controls the whitening pressure of the whitening chamber. A rice mill comprising a control unit for changing and controlling the pressure in the whitening chamber to a predetermined low pressure.