JP2002011358A - Rice treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice treatment device for mainly simplifying a convenience of the rice washing work wherein water is not used so as not to produce rice-washing waste water and time of treatment is shortened. SOLUTION: The rice treatment device is provided with a hopper 13 in which rice is stored, a rice washing part 20 which grinds the surface of rice which is introduced from the hopper 13, a rice polishing part 21 which polishes the surface of rice from the rice washing part 20, a rice bran receiving vessel 5 which receives rice bran produced by the treatment at the rice washing part 20 and the rice polishing part 21, and a motor 2 which rotatively drives both of a rotator 18 fitted to the rice washing part 20 and a rotator 19 fitted to the rice polishing part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice processing apparatus for polishing rice at home and polishing brown rice at home.

[0002]

2. Description of the Related Art The work of sharpening rice is very troublesome and causes rough skin of hands and cracks of nails. Moreover, rice juice 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 without grinding has been sold and attracted attention in recent years. However, such rice brands on the market at present are limited, and the user cannot select a desired brand of rice. In addition, a user who is eating afflicted rice, such as a farmer, is forced to perform the operation of sharpening rice according to the current procedure. In other words, such a device for producing rice is large and has a large capital investment.
The rice that the user wants cannot be cooked without grinding.

To cope with this, the present applicant has previously filed Japanese Patent Application No.
No. 0-2929 was proposed. This involves putting white rice before rice sharpening in a net-shaped inner container, causing convection of the white rice by rotation of the rotating blades driven by a motor, and friction between the rice and contact with the inner surface of the inner container. The oxidized layer on the surface of white rice is scraped off. However, with such a convection method, it took too much time until all the rice was rubbed and polished.

[0004]

The problem to be solved by the present invention is to propose a rice processing apparatus which simplifies the work of sharpening rice, can wash any white rice without producing soup juice, and can reduce the processing time. Is to do.

[0005]

In order to achieve the above object, the present invention provides a rice polishing section for sharpening the surface of rice and a rice polishing section for polishing the surface of rice separately. The rotating body is provided with a screw-shaped polishing rice roll, and the rotating body of the rice polishing section is provided with an impeller-like rice polishing blade.

More specifically, a casing containing a motor, an outer container detachably attached to the casing, a mesh container attached to the inside of the outer container, and a motor provided at the center of the bottom of the mesh container. A vertical axis connected to the rotation axis of
A hopper provided above the mesh container and having a rice discharge port opened on the axis of the vertical axis, and a rice discharge port of the hopper is vertically suspended around the vertical axis at the rice discharge port, and the other end is formed in a net shape through a resistor. There is provided a polishing rice roll chamber opened in the container, a polishing rice roll is formed in the polishing rice roll chamber on the vertical axis, and a rice polishing blade for convection of rice is provided at the bottom of the mesh container.

[0007] Further, there is provided detection means for detecting the load of the motor, and variable means for changing the number of revolutions of the motor. The variable means holds the optimum rotational speed of the polished rice, and when the detecting means detects that the load is less than a predetermined value, it determines that polished rice is finished and the variable means determines that the rice is polished. The apparatus is provided with control means for setting the optimum rotation speed of polishing, and further includes a white rice / brown rice key for selecting the type of rice to be put into the hopper and a rice quantity key for selecting the amount of rice. .

[0008]

According to the present invention, when weighed white rice is put into the hopper and started, the rice-milling roll rotates with the driving of the motor, and the rice in the hopper is guided by the rice-milling roll to the rice-milling roll chamber. be introduced. At this time, the surface of the rice is shaved by friction with the polishing rice roll, and the rice is polished. The polished rice that has passed through the polished rice roll chamber is supplied into the mesh container against the resistance of the resistor. Here, the rice is convected in the mesh container by the rotation of the rice polishing blade at the bottom of the mesh container, and is polished by friction between the rice and the mesh of the container. The rice-milling roll room (rice-milling unit) is inside the mesh container (rice polishing unit), so the bran on the rice surface shaved in the roll chamber is discharged to the mesh container once. Due to the convection, the mesh is discharged from the mesh of the mesh container to the outer container outside the mesh.

During polishing in the polishing rice roll chamber, an electromotive current is generated in the motor due to rotational resistance. Based on the value of the generated electromotive current, it is determined whether or not polishing is being performed. During polishing, the rotation of the motor is controlled so that the rotation speed of the polishing rice is optimal (for example, 1000 rpm). Conversely, when the electromotive force is weaker than a predetermined value, it is determined that all the rice in the polishing rice roll chamber has fallen into the mesh container, and the rotation of the motor is controlled so that the rotation speed of the rice polishing is optimal (for example, 800 rpm). In addition, this apparatus can select not only the rice polishing operation for white rice but also the rice polishing operation for brown rice, and the rice polishing is performed in the same procedure.

[0010]

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 processing apparatus according to one embodiment of the present invention. Reference numeral 1 denotes a casing having a motor 2 therein, an operation panel 3 protruding from the front, and a drive shaft 4 of the motor 2 protruding from the center of the upper surface. Reference numeral 5 denotes an outer container which is attached to and detached from the upper surface of the casing 1, has a cylindrical shape with a bottom, has a double structure in consideration of soundproofing, has an opening at the center of the bottom, and has this opening raised to a cylindrical shape. The cylindrical portion 6 is formed so that the bran peeled off by the rice treatment can be stored in the outer container 2. Although not shown, the outer container 5 is attached to the upper surface of the casing 1 by a bayonet connection which is fixed by screwing the lower side.

Reference numeral 7 denotes a net-like 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 toward the bottom and having a mesh smaller than rice grains. At the outer bottom of the mesh container 7, a cylindrical mounting portion 8 that fits into a cylindrical portion 6 formed at the inner bottom of the outer container 5 is provided. Axis 10
Is pierced. An upper coupling 12 connected to a lower coupling 11 provided at the end of the drive shaft 4 of the motor 2 is attached to the lower end of the vertical axis 10. In a state where the mesh container 7 is attached to the outer container 5, When set on the upper surface of the casing 1, the upper coupling 12 and the lower coupling 11 are connected, and the vertical axis 10 is driven by the motor 2. Although not shown, when the mesh container 7 is attached to the outer container 5, the mesh container 7 is attached by fitting a vertical rib provided on the attachment portion 8 of the mesh container 7 into a slit provided in the cylindrical portion 6 of the outer container 5.

Reference numeral 13 denotes a hopper attached to the upper surface of the mesh container 7 and into which a predetermined amount of rice can be put. The hopper 13 has a funnel-like bottom shape and has a rice discharge port 14 opened at the center thereof. Reference numeral 15 denotes a polishing rice cylinder vertically connected to the lower end of the rice discharge port 14 of the hopper 13, and is formed of a metal net having a mesh smaller than rice grains. Numeral 16 denotes a bearing member projecting from the inner surface of the rice discharge port 14 of the hopper 13. The bearing member 16 opens a supply port 17 for supplying the rice in the hopper 13 to the polishing rice cylinder 15. The upper end of the shaft 10 is rotatably supported.

Reference numeral 18 denotes a polishing rice roll integrally formed on the vertical axis 10 surrounded by the polishing rice cylinder 15, and forms a spiral blade for transferring rice from above to below as the vertical axis 10 rotates. Reference numeral 19 denotes a rice polishing blade formed on the vertical axis 10 near the bottom surface of the mesh container 7, extending horizontally toward the inner surface of the mesh container 7, and forming two rotor blades whose tips are vertically raised. ing. Thus, around the vertical axis 10, a polishing rice roll chamber 20 (a polishing rice section) including the polishing rice cylinder 15 and the polishing rice roll 18, and a rice polishing section 21 including the mesh container 7 and the rice polishing blade 19 are provided. Will be formed. Reference numeral 22 denotes a pressure valve provided on the outlet side of the rice-grinding cylinder 15, which is opened by pressing of rice discharged from the rice-grinding cylinder 15 by the rice-grinding roll 18, and is meshed from a discharge port 23 opened in a housing provided with a valve element. The polished rice is discharged into the container 7. Therefore, by changing the tension of the pressure valve 22, the time during which the rice is discharged is changed, and the degree of rice cutting can be adjusted.
Incidentally, reference numeral 24 denotes a lid for covering the upper part of the main unit including the upper surface of the hopper 13, reference numeral 25 denotes a handle provided outside the outer container 5 and used for attaching and detaching the outer container 5.
Either one or both are made of a transparent material such as plastic or glass, so that the inside of the outer container 2 can be observed from the outside.

With such a configuration, the rice put in the hopper 13 is introduced into the polishing rice roll chamber 20 from the supply port 17 of the bearing member 16, and the rice polishing cylinder 15 is transferred by the rotation of the polishing rice roll 18. In the meantime, the surface of the rice is shaved due to friction between the rice and the oxidized layer generated by the penetration of extra skin bran and bran is scraped off. The rice transferred downward by the polishing rice roll 18 is supplied into the mesh container 7 from the discharge port 23 while being restricted by the pressure valve 22, and the surface of the rice is polished by the rotation of the rice polishing blade 19. The bran peeled from the rice by polishing rice is discharged from the mesh of the polishing rice cylinder 15 to the reticulated container 7, and finally discharged from the reticulated mesh of the reticulated container 7 to the outer container 5 during polishing. The rice in the mesh container 7 and the bran in the outer container 5 are separated and collected.

FIG. 2 is a block diagram showing a control system of the embodiment. Reference numeral 26 denotes a controller which is connected to the operation panel 3 and mainly controls the rotation of the motor 2 in accordance with an input operation on the operation panel 3. 27 is a drive circuit for the motor 2, and a load detection circuit 28 for detecting the load of the motor 2.
And a rotation speed variable circuit 29 for turning on / off the energization of the motor 2. Note that an AC brush motor that outputs a high torque and a high rotational speed is used as the motor 2.

The load detecting circuit 28 includes a resistor 2 for detecting current.
8a, an amplifier circuit 28b for amplifying a power supply AC waveform, and a filter circuit 28c for extracting an electromotive current waveform generated by contact between a brush and a coil accompanying rotation of the AC brush motor 3 from the power supply AC waveform amplified by the amplifier circuit 28b. When,
It comprises a waveform shaping circuit 28d for shaping the current waveform extracted by the filter circuit 28c. The waveform shaping circuit 28d detects an electromotive current generated by a load applied to the motor 2 and the number of revolutions of the motor 2. The rotation speed variable circuit 29 includes a switching circuit that intermittently energizes the motor 2, and changes the relative motor rotation speed by thinning out the energizing cycle. As a result, it is possible to provide a rotation speed suitable for the rice processing operation (polished rice and rice polishing) performed by the present apparatus, and to constantly rotate at a constant rotation speed during processing while correcting a change in the rotation speed due to a change in load. It can be driven. Since the means for detecting the load may be based on a change in the number of revolutions of the motor, a general means for detecting the number of revolutions may be used instead. Further, a means for varying the number of rotations may be substituted by frequency conversion, phase control, or the like.

The operation panel 3 includes a rice quantity selection key 30 for setting the quantity of rice to be ground, a start / stop key 31 for starting and stopping the operation, and a process for processing white or brown rice. White / brown rice switching key 32 for selecting
Is provided. The rice quantity selection key 30 allows the user to select the quantity of rice from 1 go to 5 go. However, setting the rice quantity to 5 go is due to the problem of the hopper capacity on the assumption that the apparatus is downsized, This is to prevent the discharged bran from reattaching to the reticulated container 7 because the amount of bran generated after polishing rice is not acceptable. Therefore, needless to say, if the size of the apparatus is increased, the amount of rice that can be processed at one time increases.

Reference numeral 33 denotes a memory built in the controller 26, in which settings according to the rice amount selected by the rice amount selection key 30 are written. This setting is the number of rotations of the motor for each stage of rice processing and the time required for processing a prescribed amount of rice. The rice processing includes a rice polishing step-rice polishing step in a white rice menu selected by the white rice / brown rice switching key 32 and a rice polishing step-branching step in a brown rice menu. And the rotation speed of
The time in the rice polishing step and the rice removing step is stored in the range of 1-5. Incidentally, in the rice polishing step / rice polishing step, if the rotation speed of the rice polishing roll 18 is kept constant, the processing time becomes almost constant depending on the amount of rice, and the signal from the load detection circuit 28 terminates the rice polishing step / rice polishing step. Since it is possible to judge whether or not it has been done, there is no special time element because it is possible to recognize the timing of the rice polishing process, but of course it is also possible to set the time and distinguish the rice polishing process is there.

Next, the operation and usage of the rice processing apparatus of the present embodiment configured as described above will be described. Here, 3
A case of polishing white rice will be described as an example. First, the accurately measured 3 sets of white rice are put into the hopper 13, the 3 rice sets are selected by the rice quantity selection key 30, and the white rice is selected by the white rice / brown rice switching key 32, and the start / stop key 31 is inputted. Then, the rice polishing step and the rice polishing step in the white rice menu are sequentially executed.

Rice polishing step: As shown in FIG. 3, the motor 2 is driven by the start, the driven vertical axis 10 rotates, and the rotation of the rice polishing roll 18 causes the rice put into the hopper 13 to be discharged into the rice discharge port. It is introduced into the polishing rice cylinder 15 from a supply port 17 of a bearing member 16 provided at 14. Since the polishing rice roll 18 is formed in a spiral shape, the rice is rolled every time the rice polishing roll 18 rotates.
The rice is transferred from top to bottom, and during this transfer, the surface is shaved due to friction between the rice and contact between the rice and the polishing rice cylinder 15. Thus, the rice transferred to the outlet of the polishing rice cylinder 15 has a weight ratio of about 2
% Of the processed rice, the pressure of which is transferred, and the pressure valve 22 at the outlet of the polishing rice cylinder 15 is pushed through the rice discharge port 2.
3 is discharged to a mesh container 7. The spring pressure of the pressure valve 22 is appropriately adopted depending on the degree of polishing. In addition, the bran shaved from the rice surface in this process is temporarily discharged from the mesh of the polishing rice cylinder 15 into the mesh container 7.

Rice polishing step: As shown in FIG. 4, when the rice in the hopper 13 passes through the polishing rice cylinder 15 and is entirely discharged into the mesh container 7, it is detected that the load on the motor 2 has been reduced. Then, the rice polishing process is performed. Here, the rice is convected in the mesh container 7 by the rice polishing blades 19 provided on the bottom surface of the mesh container 7, and is polished by friction between the rice and contact with the inner surface of the container to become glossy white rice. At this time, the rice rotates in a mortar shape with a high side and a low center in the mesh container 7,
Convection starts from the side toward the center. And
By this convection, the bran generated in the rice polishing step is discharged from the mesh of the braided container 7 to the outer container 5, and the rice and the bran are completely separated. At this time, since the rice is convected together with the bran, the rice polishing effect is improved, and a more glossy treated rice can be obtained as compared with the conventional rice.

The rice polishing step and the rice polishing step are sequentially performed by the controller 26 in accordance with the flowchart of FIG. First, in the polishing rice process, the motor 2 is driven by the input of the start key 31 (1). Based on the current waveform extracted by the load detection circuit 28 of the motor drive circuit 27, the load applied to the motor 2 and the number of revolutions are recognized (2), and it is determined whether this value is higher than a predetermined value (3). If it is higher than the predetermined value, it is determined that the rice polishing process is continuing, and control is performed to maintain the rotation speed at n1 (4). This control is performed until the current waveform taken out by the load detection circuit 28 becomes lower than the predetermined value (5), and when the current waveform becomes lower than the predetermined value, the rice polishing step is completed.

Next, in the rice polishing step, a step time t3 according to the rice amount selected by the rice amount selection key 30 (that is, 3 go) is set by a timer (6), and then the rotation speed of the motor 2 is set to n.
2 is performed (7). And time t3
(8), the motor 2 is stopped (9), and the rice polishing process ends.

The processing (4) in the rice polishing step and the processing (7) in the rice polishing step are executed according to a subroutine in FIG. The current rotational speed n of the motor detected by the load detecting circuit 28 is fetched (10), and the fetched rotational speed n and the actually controlled rotational speed n1 (or n)
2) is compared with (11). Here, n <n1 (n
In the case of 2), a signal for extending the energization of the motor by one cycle in order to increase the rotation speed of the motor is transmitted to the rotation speed variable circuit 29.
To increase the duty ratio of the motor (12). Conversely, n>
If it is n1 (n2), a signal for shortening the energization to the motor by one cycle is sent to the rotation speed variable circuit 29 in order to reduce the rotation speed of the motor, and the control to reduce the energization rate of the motor is performed (13). .

According to the experiment conducted by the present applicant, if the rotation speed n1 in the rice polishing step is set between 1000 and 1200 rpm, three-piece rice was ground in about one to two minutes. Further, when the rotation speed n2 in the rice polishing step was set between 800 and 1000 rpm, it was possible to reliably remove bran of the three-piece rice in a few minutes. Therefore, the processing time was shortened by about 1 to 2 minutes as compared with the conventional rice processing apparatus, and the rice after polishing was able to be polished with equal or higher quality.

The bran removed by such rice treatment is mainly deposited on the inner bottom corner of the outer container 2.
Since the outer container 5 is cylindrical while the mesh container 7 has a hopper shape, the mesh container 7 has
The clearance between the bran and the outer container 5 is ensured, and even if the bran is accumulated intensively, the bran is prevented from returning to the net-like container 7. After the treatment, the outer container 5 is removed from the casing 1, and the hopper 13, the rice milling tube 15, and the mesh container 7 are removed from the outer container 5 in this order, so that the mesh container 7 has rice and the outer container 5 has bran and impurities. Can be taken out separately. And the white rice obtained as a result is processed rice which does not need to be ground before rice cooking, in which bran and impurities are removed.

Although the procedure for processing white rice in the apparatus of the present embodiment has been described above, a brown rice menu in which brown rice is put in place of white rice and polished is also executable. The basic operation of this menu is the same as that of the above-mentioned white rice menu, and only the settings (namely, the number of rotations of the motor in the rice polishing step, the number of rotation of the motor in the rice removal step and the time of the rice removal step) are different. According to the experiment conducted by the present applicant, high-quality rice was milled by setting the number of revolutions n3 in the milling process to 1600 to 1800 rpm and the number of revolutions n4 in the bran removing process to 800 to 1000 rpm.

[0028]

The present invention is configured as described above, and separately provided with a polishing rice section for polishing the rice surface and a rice polishing section for polishing the rice surface. Since both of the rice polishing blades provided in the polishing section are driven by one motor, the steps required for polishing and polishing rice can be divided by an inexpensive apparatus, and reliable rice processing can be performed. Further, since the hopper, the rice polishing unit, and the rice polishing unit are disposed coaxially with the rotating shaft, the size of the apparatus is reduced.

Further, the rice polishing section is constituted by a spiral rice polishing roll and a rice polishing cylinder provided so as to surround the rice polishing section. The time required for is reduced. The rice polishing portion is constituted by impeller-like rice polishing blades and a net-like container, and the rice polishing portion is configured to convect the rice, so that the rice bran can be reliably separated.

Further, since a rice / brown rice key for selecting the type of rice is provided, the brown rice can be polished by the same operation as the polishing of white rice. And in addition to the effect of simplifying the conventional rice sharpening work, rice can be sharpened without using water,
It is possible to provide an environment-friendly device that does not generate tomato juice.

[Brief description of the drawings]

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

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

FIG. 3 is an explanatory diagram showing an operation of a rice polishing process in the embodiment.

FIG. 4 is an explanatory diagram showing an operation of a rice polishing step in the embodiment.

FIG. 5 is a flowchart illustrating a control operation of the embodiment.

FIG. 6 is a flowchart illustrating rotation control according to the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 motor 3 operation panel 5 outer container 7 mesh container 9 bearing 10 longitudinal axis 13 hopper 15 polished rice cylinder 16 bearing member 18 polished rice roll 19 rice polishing blade 20 rice polishing unit 21 rice polishing unit 22 pressure valve 26 controller 27 motor Control circuit 28 Load detection circuit 29 Variable speed circuit 30 Rice amount selection key 31 Start / stop key 32 White rice / brown rice switching key

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B02B 7/00 B02B 7/00 P Q 101 101A

Claims (6)

[Claims] 1. A hopper into which rice is put, a rice polishing unit for polishing the surface of rice introduced from the hopper, a rice polishing unit for polishing the surface of rice introduced from the rice polishing unit, and the rice polishing unit And a bran receiving container for receiving the bran generated by the processing in the rice polishing section,
A rice processing apparatus comprising: a motor that rotationally drives both a rotating body provided in the polishing rice unit and a rotating body provided in the rice polishing unit. 2. The rotator of the polishing rice unit comprises a polishing rice roll having spiral blades for transferring rice from top to bottom by rotation,
The rice processing apparatus according to claim 1, wherein the rotating body of the rice polishing unit comprises a rice polishing blade having a rotating blade that convects rice in a mortar shape by rotation. 3. The rice polishing unit and the rice polishing unit are disposed coaxially with the rotation axis of the motor, and the motor drives the rotary unit of the rice polishing unit and the rotary unit of the rice polishing unit. The rice processing apparatus according to claim 1, wherein 4. A casing containing a motor, an outer container attached to and detached from the casing, a mesh container attached to the inside of the outer container, and connected to a rotating shaft of the motor provided at the center of the bottom of the mesh container. A passive rotating shaft, a hopper provided above the mesh container and having a rice discharge opening on the axis of the passive rotating shaft, and a rice discharge opening of the hopper connected to surround the passive rotating shaft. A rice-milling roll chamber having an end opened into a mesh container via a resistor, wherein a rice-milling roll is formed in the rice-milling roll chamber on the passive rotary shaft, and rice is convected to the bottom of the mesh-shaped container. Rice processing equipment with polishing blades. 5. The rice processing apparatus according to claim 1, further comprising: detecting means for detecting a load on the motor; and variable means for changing the number of revolutions of the motor, wherein a load exceeding a predetermined level is generated by the detecting means. Is detected,
It is determined that polishing is being performed, and the variable means holds the optimum rotational speed of the polishing rice, and when the detection means detects that the load is less than a predetermined value, it determines that polishing is finished and determines that the polishing is completed. A rice processing apparatus, comprising: a control means for setting an optimum rotation speed of rice polishing by means. 6. The rice processing apparatus according to claim 1, further comprising a white rice / brown rice key for selecting a type of rice to be put into the hopper, and a rice quantity key for selecting an amount of rice. Rice processing equipment.