JP4468573B2 - Rice milling machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a rice mill for household use, and is a rice mill capable of providing a rice-sharpening function in addition to a rice-milling function to provide washing-free rice that does not require water- sharpening.
[0002]
[Prior art]
The work of sharpening rice is one of the housework that is often avoided because it is very troublesome and causes rough skin and cracking of the nails. In addition, rice broth contains a lot of phosphorus and is a social problem as one of the major factors of environmental pollution. Against this background, rice that can be cooked as it is without being sharpened in recent years, so-called washed rice, has been sold and attracted attention. However, such rice brands currently on the market are limited, and the user cannot select a rice brand desired. Moreover, for a user who eats related rice such as a farmer, the work of sharpening the rice according to the current procedure is inevitably performed.
[0003]
As a device for simplifying the rice sharpening work, there are known devices for convection of rice by water pressure, and devices for electrically convection of rice in water by electrically driving a stirring blade. In addition to the essence of rice's natural flavor and water-soluble vitamins, the most serious problem is that the soup is produced.
[0004]
On the other hand, as a rice processing apparatus, there is a convection-type rice mill shown in Japanese Patent Application Laid-Open No. 2000-126625 filed earlier by the present applicant. This is because convection of brown rice put into the rice milling container is carried out by attaching a metal net-like rice milling container with a space in the outer container and rotationally driving the rice milling blade provided at the bottom of the rice milling container. Let's take off. Japanese Patent Laid-Open No. 2000-218183 also proposes one that has a function of polishing the surface of oxidized white rice by driving the rice milling blades at a rotational speed lower than the rotational speed at the time of rice polishing.
[0005]
[Problems to be solved by the invention]
By the way, both are rice milling machines and do not have a rice sharpening function to make white rice wash-free. In addition, regarding JP-A-2000-218183, a function of shaving the surface of white rice that has been stored and oxidized has been added, but it is not a substitute for a rice sharpening function that makes white rice wash-free rice. There was nothing to process until no washing rice continuously.
Therefore, it is an object of the present invention to add a rice sharpening function to such a rice milling machine and to perform non-water-free rice sharpening that does not give off soup.
[0006]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides an inner container made of a metal net-like material having a finer mesh than rice grains, an outer container that houses the inner container, and a rotating shaft that projects from the bottom of the inner container. In a rice mill having a convection blade attached to and detached from the rotating shaft and a motor for rotating the rotating shaft, brown rice is placed in the inner container, and the motor is driven at a predetermined number of rotations for a predetermined time to Rotate the brown rice into white rice, then keep the white rice in the inner container and continuously reduce the motor speed and drive for a predetermined time to rotate the convection blades and make the white rice wash-free without using water Rice milling-It has rice sharpening function.
[0007]
Also, put brown rice in the inner container, drive the motor at a predetermined rotation speed for a predetermined time and rotate the convection blade to turn the brown rice into white rice, and drive the motor at a rotation speed less than the rice polishing course for a predetermined time Rotating convection blades and using a rice-sharpening course in which white rice is washed without using water and a rice-sharpening course in which a rice-milling course and a rice-sharpening course are carried out in succession can be performed separately. Is.
[0008]
[Action]
According to the present invention, when the desired amount of brown rice is put in the inner container in the range of 1 to 5 and the rice milling-rice polishing course is executed, the motor rotates while maintaining the rotational speed of about 2100 rpm, and the rice milling blades are rotated. It rotates and brown rice is milled into white rice. When the milling time corresponding to the amount of brown rice that has been input (for example, 5 minutes for 5 hours) has passed, the motor is then dropped to a rotational speed of about 1800 rpm, the milled rice blades are rotated, and the milled white rice is polished to wash-free rice. Rice. Rice milling and rice sharpening operations are continuously performed in the inner container, and the rice convects as the milled rice blades rotate, and the surface of the rice is scraped off by friction between the rice and the stitches of the milled rice container. The scraped rice cake is discharged from the stitches of the rice milling container to the outer container and stored in the outer container.
[0009]
【Example】
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is an internal cross-sectional explanatory view showing a rice milling machine according to an embodiment of the present invention. Reference numeral 1 denotes a main body having an L shape when viewed from the front, 2 an outer container attached to and detached from the upper surface of the L-shaped horizontal portion of the main body 1, and 3 a motor provided in the L-shaped vertical portion of the main body 1. The outer container 2 has a bottomed cylindrical shape, has a double structure in consideration of soundproofing properties, and is attached to the main body 1 by bayonet coupling that is fixed by screwing the lower side. In addition, a cylindrical portion 10 raised in a cylindrical shape is formed on the inner bottom portion of the outer container 2, so that rice bran peeled off by milling or sharpening can be stored in the outer container 2.
[0010]
Reference numeral 9 denotes an inner container attached to the outer container 2, which has a shape that becomes smaller in cross section as it goes downward, and is formed from a metal mesh material having a mesh smaller than that of rice grains. The shape of the inner container 9 may be a mesh (punching plate) or the like as long as it is not a net-like material, so long as the rice cake is discharged and the rice does not pass through. On the outer bottom surface of the inner container 9, there is provided a cylindrical mounting portion 11 that is fitted on a cylindrical portion 10 formed on the inner bottom portion of the outer container 2, and the rotating shaft 4 is penetrated from the center of the mounting portion 11. The upper coupling 5 connected to the lower coupling 6 on the main body 1 side is attached to the lower end of the rotating shaft 4. Although not shown, when attaching the inner container 9 in the outer container 2, it is performed by fitting a vertical rib provided on the attachment part 11 side into a slit provided on the cylindrical part 10 side. When the inner container 9 is mounted in the outer container 2 in such a configuration, the upper coupling 5 on the inner container 9 side and the lower coupling 6 on the main body 1 side are connected, and the rotation of the motor 3 is performed via the belt transmission unit. It is transmitted and rotates the rotating shaft 4.
[0011]
Reference numeral 12 denotes a convection vane attached to the tip of the rotating shaft 4, extending substantially horizontally from the lower side of the main body 13 toward the inner surface of the inner container 9. The two blades 14 are formed by being raised along. As a result, the brown rice / white rice put into the inner container 9 is forcedly circulated as indicated by the arrow line a by the rotation of the convection blades 12 and the rice is rubbed against each other, so that the rice surface is shaved and excess rice cake is scraped off.
[0012]
A control unit 7 exposes the operation panel 8 on the upper surface of the main body 1 above and controls the motor 3 in accordance with an input operation on the operation panel 8. 16 is a lid that covers the upper opening of the outer container 2, and 17 is a handle provided outside the outer container 2. Either or both of the outer container 2 and the lid 16 are made of a transparent material such as plastic or glass. The state inside the outer container 2 can be observed from the outside.
[0013]
FIG. 2 is a block diagram showing a control system of the embodiment. Reference numeral 19 denotes a drive circuit for the motor 3, which includes a rotation speed detection circuit 20 that detects the rotation speed of the motor 3 and a rotation speed variable circuit 21 that turns on and off the power supply to the motor 3. The motor 3 employs an AC brush motor that outputs high torque and high rotation speed. The rotation speed detection circuit 20 includes a current detection resistor 20a, an amplification circuit 20b that amplifies the power supply AC waveform, a brush and a coil that accompany the rotation of the AC brush motor 3 from the power supply AC waveform amplified by the amplification circuit 20b. The filter circuit 20c extracts the current waveform generated by the contact of the filter circuit 20c, and the waveform shaping circuit 20d shapes the current waveform extracted by the filter circuit 20c. The rotation speed variable circuit 21 is configured by a switching circuit that connects and disconnects power to the motor 3 in units of a predetermined period.
[0014]
The operation panel 8 includes a rice amount selection key 22 for setting the amount of rice to be processed, a degree selection key 23 for setting the degree of processing brown rice such as sown rice, and a start for starting and stopping the operation. A stop key 24 and a rice sharpening key 25 for sharpening the white rice to make it non-washed rice are provided. In this embodiment, the amount of brown rice or white rice from 1 to 5 can be selected with the rice amount selection key 22, and with the degree selection key 23, “germ, 3 minutes, 5 minutes, 7 minutes, You can select from 6 types of “white rice and rice sharpening”. That is, the degree selection key 23 can select a rice milling course in which five levels of rice milling can be selected, and a rice milling-rice polishing course that performs from rice polishing to rice polishing, and the rice polishing key 25 can select a rice polishing course.
[0015]
FIG. 3 is a table for setting motor drive data in the processing course stored in the memory 26 built in the control unit 7. The time required for processing differs depending on the amount of rice selected by the rice amount selection key 22 and each of the courses selected by the degree selection key 23 and the rice sharpening key 25 (the amount of rice is high and the degree of polishing is different). As the value increases, the time required for the rice milling becomes longer.) Therefore, these data are stored in the memory 26, and according to the rice quantity and course set by the rice quantity selection key 22, the degree selection key 23, and the rice sharpening key 25. The drive time of the motor is set. When the rice sharpening key 25 is pressed, the motor is driven based on the data of the rice sharpening course.
[0016]
In addition, the motor energization rate at the start of rice milling for each rice quantity is set to an appropriate number of revolutions regardless of the rice quantity, considering that the rotational load at the start of operation differs depending on the rice quantity (for example, 1 go and 5 go) This is for starting the operation. In addition, the energization rate of the motor in the present embodiment indicates how many cycles energization is performed in 16 cycles of the AC frequency, and is set according to the total number from n1 to n5.
[0017]
Hereinafter, the operation and usage in the embodiment will be described for each course. In addition, the case where the amount of rice processed in each course is set to 3 go is illustrated.
1 . Rice milling-Rice sharpening course Put 3 brown rice accurately weighed in a measuring cup in the inner container 9, select "3 go" with the rice quantity selection key 22, and select "until rice sharpening" with the degree selection key 23 To do. When the start / stop key 24 is pressed from this state, a rice-rice polishing course is executed according to the flowchart shown in FIG.
First reads the motor driving current index n3 in the case of 3 Go from memory 26 (1), starts the motor along the data (2). Thereafter, the rotation of the motor is controlled so as to be the rotational speed R1 at the time of milling, and thereafter the rotational speed R1 is always maintained during the milling operation (3). When the milling time c elapses (4), the process shifts to the next rice sharpening operation, and the rotational speed of the motor is controlled to be the rotational speed R2 at the time of rice sharpening. Hold (5). When the rice sharpening time h elapses (6), the motor is stopped and the process ends.
[0018]
2 . Rice milling course In the same procedure as the rice milling-rice-sharpening course, set 3 brown rice grains in the inner container 9 and select “3 go” with the rice quantity selection key 22 on the operation panel 8. Select the degree of milling from “3 minutes, 5 minutes, 7 minutes, white rice”. Here, “white rice” is selected. When the start / stop key 24 is pressed from this state, the rice milling course is executed.
This rice milling operation is the same as the rice milling operation in the rice milling-rice sharpening course, that is, the processes (3) and (4) including the motor starting processes (1) and (2) in the flowchart of FIG. That is, reads the motor driving current index n3 in the case of 3 Go from memory 26, activates the motor convection blade 12 is rotated, then the rotation control so as the motor rotation speed R1 along this data When the specified time c is reached, the motor is stopped and the process ends.
In this rice milling course, only when “germ” is selected with the degree selection key 23, the rotational speed controlled in the process (3) is lower than R1 as a treatment for increasing the remaining rate of germ in brown rice. Control is performed at the rotational speed R3. According to the experiment by the present applicant, if the rotation speed R3 is set in the range of 1400 to 1600 rpm and the driving time m in the case of 3 is set to 3 minutes, germinated rice was obtained.
[0019]
3 . Rice sharpening course Three rice grains are set in the inner container 9 in the same procedure as the rice polishing-rice sharpening course, the rice sharpening key 25 is input, and the rice quantity selection key 22 is used to select “3 go”. When the start / stop key 24 is pressed from this state, the rice sharpening course is executed.
This rice sharpening operation is the same as the processing (5) and (6) including the rice sharpening operation in the rice milling-rice sharpening course, that is, the motor starting processes (1) and (2) in the flowchart of FIG. That is, reads the motor driving current index n3 in the case of 3 Go from memory 26, activates the motor convection blade 12 is rotated, then the rotation control and so the motor rotation speed R2 along this data When the specified time h is reached, the motor is stopped and the process is terminated.
[0020]
The rotational speed R2 at the time of rice sharpening is set lower than the rotational speed R1 at the time of rice polishing. According to the applicant's test, if the rotational speed R1 is set in the range of 2000 to 2200 rpm and the driving time c in the case of 3 is set to 3 minutes and 20 seconds, in terms of factors such as rice cracking and motor noise The best condition was obtained. Moreover, if the rotation speed R2 is set in the range of 1300 to 1800 rpm and the driving time h in the case of 3 is set to 1 minute and 40 seconds, even white rice having a different moisture content can be dealt with, and an ideal state was obtained. .
[0021]
Now, during such rice milling and rice sharpening operations, the rotational speed is always detected, and the rotational speed of the motor is the rotational speed R1 at the time of rice polishing, regardless of the setting of the rice amount and the degree of rice polishing. The rotation is controlled so that the rotation speed becomes R2. At this time, when the amount of rice is large, the load of rotation is large, and conversely, when the amount of rice is small, the load of rotation is small, and even if the amount of rice is the same, the rotational load changes depending on the progress of processing. Therefore, control is performed such that the rotational speed of the motor is detected at a predetermined timing, and is increased when the rotational speed is lower than the reference rotational speed, and is decreased when the rotational speed is increased.
[0022]
FIG. 5 is a flowchart showing this control. The rotational speed of the motor detected by the rotational speed detection circuit 20 is captured (7), and the rotational speed R captured by the controller 7 is compared with the specified rotational speed R1 (R2). Here, if R <R1 (R2) (8), a signal for increasing the motor energization time by one cycle is sent to the rotation speed variable circuit 21 to increase the motor rotation speed, and the motor energization rate is increased. Raise (9). If R> R1 (R2) (10), a signal for reducing the motor energization time by one cycle is sent to the rotation speed variable circuit 21 in order to lower the motor rotation speed, and the motor conduction ratio is lowered. Control (11) is performed.
[0023]
In the case of 3 cases illustrated, as shown in FIG. 6 (a), the motor is started at the energization rate n3 for energizing the 5-cycle motor in 11 cycles and de-energizing the 11-cycle motor, and detected by the rotation control in FIG. When the rotational speed is lower than R1 (R2), as shown in FIG. 6 (b), the 6-cycle motor energization in which the motor energization is increased by 1 cycle is set to the 10-cycle motor non-energization. ), The motor energization is shortened by 1 cycle as shown in FIG. 6C, and the 4-cycle motor energization-12-cycle motor de-energization is performed. As a result, control is performed so as to approach the specified rotational speed. It is done. As a result, the motor 3 always rotates at the controlled rotation speed, and a stable rotation operation is always executed.
[0024]
The convection blades 12 that rotate by driving the motor controlled in this way cause the brown rice or white rice contained in the inner container 9 to convect as indicated by the arrow line a in FIG. That is, the rice at the bottom of the inner container 9 is pushed outward by the blade 14 of the convection blade 12, and instead, the rice at the center of the inner container 9 acts to flow down along the blade main body 13. As a result, the rice grains rub against each other and the epidermis is peeled off. At this time, the peeled soot is blown into the outer container 2 from the mesh portion of the inner container 9 by the rotational force of the convection blades 12, and is mainly accumulated at the inner bottom corner (b part in FIG. 1) of the outer container 2. However, since the inner container 9 has a hopper shape, while the outer container 2 has a cylindrical shape, the clearance between the rice milling container 9 and the outer container 2 is ensured in this easily deposited portion, so Even if it accumulates, it is possible to avoid the rice cake returning to the rice mill container 9.
[0025]
After finishing the rice milling and polishing, if the outer container 2 is removed from the apparatus main body 1 and then the inner container 9 is removed from the outer container 2, rice remains in the inner container 9 and rice cake remains in the outer container 2. Each can be taken out and used. According to the applicant's test, the brown rice was ground by 10% by the milling operation up to white rice and further 2% by the rice sharpening operation. In particular, the rice obtained by the rice sharpening operation was able to be cooked as it was without washing, because the skin residue remaining in the vertical grooves on the surface of the rice was scraped off. And the rice cooked in this way was the same or more in taste, luster, flavor, and appearance as compared to the rice cooked by the normal procedure of washing white rice.
[0026]
Although this embodiment is configured as described above, the present invention is not limited to the above embodiment. For example, in the above-described embodiment, regardless of the amount of rice and the degree of rice polishing (excluding germs), the rotation is always controlled at a constant rotational speed. For example, the amount of rice is 1800 rpm for 1 go and 2200 rpm for 5 go. A corresponding rotation speed may be set so that the rice milling time is constant. In this case, the control for keeping the rotational speed at each rice amount constant is the same as the above-described motor rotational speed detection and rotational speed variable control, and the rotational speed is controlled instead of the rice milling time in the table of FIG. It suffices if data is stored. This is the same for rice sharpening, and the rotational speed may be changed according to the amount of white rice.
[0027]
In addition, in order to improve the efficiency of rice discharge and separation in rice sharpening operation, if a discharge means such as an air blower or suction fan is provided, the quality of the product will be high enough that the rice will be well-cut and will not become turbid even when it is put into water. Washed rice can be obtained. In this case, it is possible to act on the white rice that is in operation and to lift and remove the straw remaining between the rice without being discharged from the net.
[0028]
【The invention's effect】
Since this invention is configured as described above, the rice sharpening function is added to the type of rice milling machine that rotates rice milling blades in the rice milling container, thereby providing a rice milling machine with high commercial value. it can. And since we have been able to sharpen rice with such a convection-type rice mill, we don't need to produce any tofu soup, and we have contributed to environmental measures.
[0029]
In addition, since the course of brown rice to white rice, white rice to no-wash rice, and brown rice to no-wash rice can be arbitrarily selected, the user can select a rice of a favorite brand and make it non-washed rice. And since the operation | work which carries out washing-free rice from brown rice can be performed continuously, it can be stored in the state of brown rice at home, and a troublesome operation can be omitted without impairing the taste.
[Brief description of the drawings]
FIG. 1 is an internal sectional view showing a rice milling machine according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a control system of the embodiment.
FIG. 3 is a diagram illustrating a table of a memory 26 built in the control unit 7 of the embodiment.
FIG. 4 is a flowchart showing the operation of the embodiment.
FIG. 5 is a flowchart showing motor control of the embodiment.
FIG. 6 is an explanatory diagram illustrating control for changing the rotation speed according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Outer container 7 Control part 8 Operation panel 9 Inner container 12 Convection blade 26 Memory | storage means (memory)

Claims (3)

An inner container made of a metal mesh material having a finer mesh than rice grains, an outer container that houses the inner container, a rotating shaft that projects from the bottom of the inner container, a convection blade that is attached to and detached from the rotating shaft, and a rotation In a rice milling machine equipped with a motor that rotates the shaft,
Put brown rice in the inner container, drive the motor at a predetermined rotation speed for a predetermined time to rotate the convection blades to make the brown rice white rice, then reduce the rotation speed of the motor continuously with this white rice in the inner container The rice milling machine is equipped with a rice milling-rice sharpening function that drives for a predetermined time to rotate the convection blades to wash the white rice without using water . An inner container made of a metal mesh material having a finer mesh than rice grains, an outer container that houses the inner container, a rotating shaft that projects from the bottom of the inner container, a convection blade that is attached to and detached from the rotating shaft, and a rotation In a rice milling machine equipped with a motor that rotates the shaft,
Put brown rice in the inner container, drive the motor at a predetermined speed for a predetermined time and rotate the convection blades to turn the brown rice into white rice, and drive the motor at a lower speed than the rice polishing course for a predetermined time A rice milling machine comprising a rice polishing course in which white rice is washed without using water by rotating convection blades, and a rice polishing-rice polishing course in which a rice polishing course and a rice polishing course are continuously performed.   3. A rice mill according to claim 2, wherein a selection means for selecting a desired course from each rice processing course, a rice quantity setting means for setting the amount of rice to be processed, and a processing course selected by the selection means. And storage means for storing the drive time and rotation speed of the motor according to the amount of rice set by the rice quantity setting means, and control means for controlling the drive of the motor based on the data of the storage means. Characteristic rice milling machine.

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