JP2000218183A - Rice milling machine - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to improve the commercial value by adding a function of polishing white rice to a rice mill of the type of convection and polishing. [Structure] In a rice-milling machine of a type in which rice is convected in a rice-milling container 9 made of a metal mesh material having a finer mesh than rice grains to remove rice bran, a rotation speed r lower than the rotation speed at the time of rice polishing.
And has a white rice polishing function for driving a motor for a predetermined time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household rice mill, and more particularly to a rice mill having a desired rice milling degree within a predetermined time.

[0002]

2. Description of the Related Art Household rice mills have been developed to meet the needs of storing rice in brown rice and milling immediately before eating so as not to impair the taste of rice. Conventionally, as shown in Japanese Utility Model Publication No. 63-13793, this type of rice milling machine has a cylindrical outer container having a bottom and an eye which is installed in the outer container with an interval from the inner peripheral wall of the outer container. A milled cylindrical rice mill, a milling blade attached to a drive shaft provided on the bottom surface of the outer container and rotatable in the milling vessel, and a motor for rotating the drive shaft, the milling vessel It is known that brown rice to be fed is debranched by rotation of milled rice blades.

[0003]

Now, in general, white rice is
If stored for a long time in a place where the temperature is high or the humidity is high, the surface is oxidized and discolored to yellow, which may impair the taste. In this case, it is only necessary to scrape off the discolored portion, but a treatment of sharpening well before cooking white rice did not completely solve the problem. By the way, conventional convection type rice mills could not polish white rice. If the white rice is polished at the rotation speed of the motor during rice polishing, the rice is broken and becomes finer, and the grains become smaller. Therefore, an object of the present invention is to improve the commercial value by adding a function of polishing white rice to a rice mill of the type that is made by convection.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an outer container detachably attached to a main body, and an outer container provided at a predetermined distance from an inner surface of the outer container. A milling container made of a metal mesh material having finer stitches than rice grains, and a rotating shaft protruding from the bottom of the milling container,
A rice mill having a milling blade attached to and detached from the rotating shaft, and a motor for rotating the rotating shaft, the rice mill having a white rice polishing function for driving the motor at a rotation speed lower than the rotation speed during rice polishing for a predetermined time. It is.

[0005] Further, white rice polishing setting means for setting white rice polishing, white rice amount setting means for setting the amount of white rice for white rice polishing, and white rice polishing time corresponding to the white rice amount set by the white rice polishing setting means are stored. The rice polishing time according to the white rice amount set by the white rice amount setting means, which is provided with the storage means, is at least shorter than the rice polishing time in complete rice polishing.

[0006]

According to the present invention, the rotation speed of the motor and the driving time of the motor are set by setting the amount of milled rice and the degree of milling.
When started, the rice milling blades rotate, convection the brown rice, and the rice is rubbed between the rice and the rice and the inner surface of the rice polishing container, and the rice is removed by bran removal. In addition to such basic rice polishing functions, it is possible to polish the surface of white rice and whiten the discolored white rice. In this function, if you put white rice in a rice milling container instead of brown rice and set white rice polishing with white rice polishing setting means also used as rice polishing degree setting means, the motor will be driven at a lower rotation speed than during rice polishing, and the white rice will slowly convect. The rice is rubbed between the rice and the inner surface of the rice and rice milling container,
The surface of the white rice is polished. The driving time for polishing rice is shorter than the complete polishing time, and is stored in the storage means according to the amount of white rice. The user can set the amount of white rice with the rice polishing amount setting means to perform optimal white polishing. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings. FIG. 1 is an explanatory internal sectional view showing a rice mill according to one embodiment of the present invention. 1 is an L-shaped rice milling machine main body, 2 is a main body 1
Outer container 3 attached to and detached from the upper surface of the L-shaped horizontal portion of the main body 1
This is the motor 3 provided in the vertical part of the mold. The outer container 2
It has a cylindrical shape with a bottom, has a double structure in consideration of soundproofing, and is attached to the main body 1 by a bayonet connection which is fixed by screwing the lower side. In addition, a cylindrical portion 10 is formed at the inner bottom of the outer container 2 and rises in a cylindrical shape, so that the bran peeled off by the milled rice can be stored in the outer container 2.

Reference numeral 9 denotes a rice milling container mounted in the outer container 2, which is formed of a metal net-like material having a shape such that its cross section becomes smaller as it goes downward, and having a mesh smaller than rice grains. On the outer bottom surface of the rice polishing container 9, there is provided a cylindrical mounting portion 11 that fits into a cylindrical portion 10 formed on the inner bottom portion of the outer container 2, and the rotating shaft 4 passes through the center of the mounting portion 11. At the lower end of the rotating shaft 4, an upper coupling 5 connected to the lower coupling 6 on the main body 1 side is attached. Although not shown, the rice mill 9 is attached to the outer container 2 by fitting a vertical rib provided on the attachment portion 11 side to a slit provided on the convex portion 10 side. When the rice polishing container 9 is mounted in the outer container 2 in such a configuration, the upper coupling 5 on the rice polishing container 9 side and the lower coupling 6 on the main body 1 are connected, and the rotation of the motor 3 is transmitted via the belt transmission unit. Communicated,
The rotation shaft 4 is rotated.

Reference numeral 12 denotes a milling blade attached to the tip of the rotary shaft 4, which is a substantially cylindrical main body 13 and extends horizontally from the lower side of the main body 13 toward the inner surface of the milling vessel 9, and the tip stands vertically. It is composed of a plurality of raised blades 14 and a blower blade 15 integrally formed on the upper end of the main body 13 and blowing air into the rice polishing container 9 by rotation. As a result, the brown rice put in the rice polishing container 9 is forcibly circulated as indicated by the arrow line a to produce the polished rice, and is blown as indicated by the arrow line b to prevent a rise in the temperature of the rice in the polished rice.

Reference numeral 7 denotes a controller, which exposes an operation panel 8 on the upper surface of the main body 1 above it, and controls the motor 3 in accordance with an input operation on the operation panel 8. Reference numeral 16 denotes a lid that covers the upper opening of the outer container 2, and 17 denotes 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 inside of the outer container 2 can be observed from outside.

FIG. 2 is a block diagram showing a control system of the embodiment. Reference numeral 19 denotes a drive circuit of the motor 3, which includes a rotation number detection circuit 20 for detecting the rotation number of the motor 3, and a rotation number variable circuit 21 for turning on and off the power supply to the motor 3. The motor 3 employs an AC brush motor that outputs a high torque and a high rotation speed. The rotation speed detection circuit 20 includes a current detection resistor 20a and an amplification circuit 2 for amplifying a power supply AC waveform.
0b and a filter circuit 2 for extracting a current waveform generated by contact between a brush and a coil accompanying rotation of the AC brush motor 3 from a power supply AC waveform amplified by the amplifier circuit 20b.
0c, and a waveform shaping circuit 20d for shaping the current waveform extracted by the filter circuit 20c. The rotation speed variable circuit 21 is configured by a switching circuit that cuts off the power supply to the motor 3 in a predetermined cycle unit.

The operation panel 8 has a rice milling amount selection key 22 for setting the amount of rice to be milled, a rice milling degree selection key 23 for setting the degree of milling such as milling, and the like, for starting and stopping the operation. The start / stop key 24 and an additional milling key 25 for rotating the motor only while inputting, to compensate for insufficient milling, are provided.
Up to 5 go, the degree of milling can be selected from 3 minutes milling to milled rice and polished rice.

FIG. 3 is a table for setting the rice polishing operation data stored in the memory 26 built in the controller 7. When performing rice polishing, the time required for rice polishing differs depending on the amount of brown rice and the degree of rice polishing (the time required for rice polishing becomes longer as the amount and the degree of rice polishing increase).
The table shown in FIG. 3 is stored in the memory 26 built in the controller 7 and the milling amount selection key 22 and the milling degree selection key 2 are stored.
The driving time of the motor is set according to the milling amount and milling degree set in step 3. In this embodiment, the milling time is set in 20 steps from the lowest value a to the highest value t. Note that the settings other than the polishing of white rice are such that the specified rotation speed R during the rice polishing operation is constant, and the polishing speed of the white rice polishing is set at a lower rotation speed r.

Further, the setting of the motor energization rate at the start of rice milling according to the amount of milled rice is performed in consideration of the fact that the rotational load at the start of milling differs depending on the amount of milled rice (for example, 1 go and 5 go), and is appropriate regardless of the setting. This is for starting the rice polishing at the rotation speed. The duty ratio of the motor in this embodiment changes by switching the on / off timing of the motor, and indicates that the power is supplied for N1 cycles and disconnected for N2 cycles. The maximum value E is set in accordance with the total number.

The operation and usage in the embodiment will be described below. Put the weighed brown rice in the milling container 9, select the desired milling amount and milling degree with the milling amount selection key 22 and the milling degree selection key 23 on the operation panel 8, and press the start / stop key 24. In the main routine, the motor is driven at the motor duty ratio at the start of rotation preset in the memory 26 in accordance with the rice milling amount and the rice milling degree set on the operation panel 8 (for example, if the rice milling amount is one, the rice milling degree When the whole rice is set, the duty ratio A in FIG.
Then, the milling blades 12 rotate to start milling. As the blades 12 rotate, the rice at the bottom of the milling vessel 9 is pushed outward by the rotating blades 14 and the rice in the center of the milling vessel 9 flows down along the blade main body 13 instead. The convection occurs as in a, whereby the rice grains mainly rub against each other and the epidermis is peeled off. At this time, the exfoliated bran is blown into the outer container 2 from the mesh portion of the rice polishing container 9 by the rotational force of the rice polishing blades 12, and mainly to the inner bottom corner (portion b in FIG. 1) of the outer container 2. Although the rice is deposited, the outer container 2 is cylindrical while the rice container 9 has a hopper shape. Therefore, the clearance between the rice container 9 and the outer container 2 is secured in the portion where the rice is easily deposited, and the rice bran is concentrated. It is possible to prevent the bran from returning to the rice polishing container 9 even if the rice is accumulated.

When the rice polishing blades 12 rotate, the blower blades 15 integrally formed at the upper end thereof also move, and the rice polishing containers 9 are rotated.
It rotates so as to blow air as indicated by arrow c. By this blowing, the temperature rise of the rice due to friction is alleviated, and it is possible to prevent a decrease in taste due to the milled rice. According to the experiment, it was demonstrated that the temperature can be lowered by about 2 to 3 degrees by the blowing blade 15. Then, the controller 7 finishes the milling after the milling time given by the milling amount and the milling degree has elapsed (for example, when the milling amount is 1 and the milling degree is set to all milling, the milling time p in FIG. 3 is used. Ends). When the rice polishing is completed, the outer container 2 is removed from the apparatus main body 1 and then the rice container 9 is removed from the outer container 2.
The rice remains and the bran remains in the outer container 2, so that each can be taken out and used.

In such a milling operation, the number of rotations is detected at predetermined timings. The number of rotations of the motor 3 is set at the above-mentioned specified number of rotations regardless of the setting of the amount of milling or the degree of milling. R is controlled to be R (approximately 2000 to 2200 rpm is desirable). At this time, when the amount of milled rice is large, the load of rotation is large.On the contrary, when the amount of milled rice is small, the load of rotation is small. The rotation speed of the motor is large, the rotation speed of the motor decreases, and as the rice polishing proceeds, the rotation load decreases and the rotation speed of the motor increases.
Therefore, the rotation speed of the motor is detected at a predetermined timing,
When the rotation speed is lower than the reference rotation speed, the control is performed such that the rotation speed is increased, and when the rotation speed is increased, the rotation speed is reduced.

FIG. 4 is a flow chart showing this control. When an interrupt signal is input at a predetermined timing, the rotation speed of the motor detected by the rotation speed detection circuit 20 is fetched (1), and the rotation speed fetched by the controller 7 is obtained. The number R1 is compared with the specified rotational speed R (2). Here, if R> R1, a signal for increasing the energization time to the motor by one cycle is sent to the rotation speed variable circuit 21 in order to increase the rotation speed of the motor, and the energization rate of the motor is increased (3). If R <R1, a signal to reduce the motor energization time by one cycle to reduce the motor energization time is sent to the rotation speed variable circuit 21 to reduce the motor energization rate (4). Is going.

Here, the control for varying the number of revolutions will be described with reference to FIG. 5. In the process (2) in the flow chart of FIG. 4, the duty ratio of the motor 3 is changed from 6 cycles to 10 cycles as shown in FIG. When the communication is successful, in the process (3), control is performed to extend the energization time by one cycle as shown in FIG. 5 cycle energization-
The control is performed to cut off the eleventh cycle and extend the energizing time for one cycle. As a result, the motor 3 always rotates at the specified rotational speed R, and a stable rice milling operation is performed. FIG. 6 shows the change in the number of revolutions over time. The dotted line represents the conventional rice mill and the solid line represents the rice mill of the present invention.

After the milling time has elapsed and the milling operation is completed, if the user wants to further mill the rice by checking the actual milling degree of the rice, the additional milling key 25 can be pressed to add the milling operation. At this time, since the motor 3 can be driven only while the additional rice polishing key 25 is being input, the rice can be observed through the transparent cover 11 and the additional rice polishing key 25 can be released at an appropriate place. Also at this time, it is needless to say that the driving of the motor 3 is executed based on the above-described rotation speed detection and the rotation speed variable control.

Further, the present invention has a function of polishing white rice as one of the settings of the degree of rice polishing. The difference between the white rice polishing operation and the above-described rice polishing operation will be described.
Polishing of white rice is for scraping the surface of white rice that has been discolored due to a long storage period or poor storage conditions of the rice, and has a lower rotational speed r (approximately 16
The rotation is performed by driving the motor at 00 to 1800 rpm. This is because white rice has low frictional resistance between rice, so that if the rotation speed is too high, the rice will not be able to convect well and the whole rice cannot be polished. To start the operation, put white rice in a milling container instead of brown rice, select polishing rice with the milling degree selection key 23, select the amount of white rice to be polished with the milling amount selection key 22, and then start / stop key 24. Is started, and the motor is rotated at the start duty ratio of the motor according to the amount of white rice (for example, at the time of 1 go, the duty ratio F in FIG. 3). Then, irrespective of the amount of white rice, the motor rotates while being held at a lower rotational speed r than during the rice polishing, and the rice is rubbed between the rice and the inner surface of the rice polishing container while slowly convectioning the white rice, and the surface of the white rice is polished. It can be raised.

Even when the white rice polishing is set, if additional polishing is desired, time can be added with the additional rice polishing key 25. The driving time of the motor according to the amount of white rice and the duty ratio of the motor at the start when white rice polishing is selected are as shown in FIG. 3, and the driving time from the lowest value u to the highest value y from 1 to 5 is shown. , The lowest value F
The motor duty ratio is set to the maximum value J. And
The drive times u to y are set shorter than the complete milling times p to t.

This embodiment is configured as described above.
The present invention is not limited only to the above embodiment. For example, in the above-described embodiment, the rotation is always controlled at a constant rotation speed regardless of the amount of milled rice and the degree of milling (excluding polishing of white rice).
Set the number of rotations according to the amount of milled rice, such as 200 rpm,
The milling time may be fixed. In this case, the control for keeping the rotation speed constant at each rice milling amount is as follows:
This is the same as the detection of the rotation speed of the motor and the rotation speed variable control described above, and the data of the rotation speed may be stored instead of the milling time in the table of FIG. The same applies to polishing of white rice, and the number of rotations may be changed according to the amount of white rice.

[0024]

As described above, the present invention is constructed as described above, and is a type of rice milling machine for polishing rice by rotating rice milling blades in a rice milling container. The resulting rice can be eaten again in the form of clean white rice, improving its commercial value as a rice mill. In addition, since the white rice polishing function is performed at a rotation speed lower than the rotation speed at the time of rice polishing, the rice can be worked so as to polish only the rice surface without excessively shaving rice, so that it is possible to prevent rice cracking and bulk loss. . Furthermore,
Since the driving time of the motor corresponding to the amount of white rice is stored in advance in the white rice polishing, the user can execute the white rice polishing only by a simple operation of setting the white rice amount. Since the driving time is shorter than the rice polishing time, the rice temperature does not rise.

[Brief description of the drawings]

FIG. 1 is an internal sectional view showing a rice mill according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a control system according to the embodiment.

FIG. 3 shows a memory 2 built in a controller 7 of the embodiment.
8 is a diagram showing a table No. 8. FIG.

FIG. 4 is a flowchart illustrating motor control according to the embodiment.

FIG. 5 is an explanatory diagram showing control for varying the number of revolutions in the embodiment.

FIG. 6 is an explanatory diagram showing a change over time of the motor rotation speed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Outer container 8 Operation panel 9 Milling container 12 Milling blade 19 Drive circuit 20 Revolution detection circuit 21 Revolution variable circuit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Shimizu 1825 Amemiya Amemiya, Shohan-shi, Nagano M-K Seiko Co., Ltd.

Claims (3)

[Claims] An outer container detachably attached to a main body, a rice mill container made of a metal mesh material having a mesh smaller than rice grains and provided at a predetermined distance from an inner surface of the outer container; In a rice mill having a rotating shaft protruding from the bottom of a milling container, a milling blade attached to and detached from the rotating shaft, and a motor for rotating and rotating the rotating shaft, a predetermined time at a rotation speed lower than the rotation speed during rice polishing. A rice milling machine with a rice polishing function that drives a motor. 2. A rice milling machine according to claim 1, wherein said white rice polishing means is used for setting white rice polishing, white rice amount setting means for setting white rice polishing amount, and white rice polishing setting means. A rice milling machine characterized by comprising storage means for storing white rice polishing time according to the amount of white rice. 3. The rice milling machine according to claim 2, wherein the rice polishing time according to the rice milling amount set by said rice milling amount setting means is at least shorter than the rice milling time in complete rice milling. Machine.