JP6821428B2 - Rice milling machine - Google Patents

Description

The present invention relates to a rice milling machine for milling brown rice at home, and more particularly to a rice milling machine for milling rice by convection of brown rice.

As a rice milling machine of a type in which brown rice is agitated and convected to perform rice milling, an apparatus shown in Patent Document 1 and the like is known. This device includes a rice milling container made of a metal mesh material into which brown rice is charged, a bran container that houses the rice milling container inside, a rice milling blade provided at the bottom of the rice milling container, and a lid attached to the upper surface of the bran container. By rotating the rice milling blades, the brown rice is convected in the rice milling container, and the bran layer of the brown rice is peeled off by friction between the rice or between the rice and the inner surface of the rice milling container.

In such a convection type rice milling machine, in order to ensure safety during rice milling operation, safety measures are taken so that the operation start switch of the device functions only after the lid is attached to the upper surface of the bran container. Since the rice milling blades rotate during the rice milling operation, care should be taken not to expose the rotating rice milling blades and convected brown rice. Therefore, near the upper part of the bran container, a detection means for detecting that the lid is attached is provided, which also serves as a lock mechanism for fixing the lid.

In the apparatus disclosed in Patent Document 1, when a bran container containing a rice milling container is attached to the rice milling machine main body, a motor is arranged in the rice milling machine main body so as to be side by side with the bran container. The motor housing portion of the rice milling machine that houses the motor has a shape that is approximately the same height as the lid attached to the bran container. A lock mechanism for fixing the lid is provided on the upper part of the rice milling machine body, and the lid covering the bran container is fixed to the lock mechanism. Furthermore, the lid is fixed to the lock mechanism on the rice milling machine body side, and at the same time, the lock mechanism is equipped with a pressing sensor. By fixing the lid and contacting the pressing sensor, it is determined that the lid is attached. ing.

As described above, in the conventional apparatus, the lid attached to the upper part of the bran container is fixed and the presence / absence of attachment is detected at the upper part of the rice milling machine, which causes the superstructure of the rice milling machine body to become complicated. In addition, at least a part of the rice milling machine body has a shape that reaches the height position of the lid that covers the rice bran container, and by arranging the motor on the side of the rice bran container and covering it with the body casing. , The purpose of accommodating the motor and the purpose of making the rice milling machine main body a start-up shape were compatible. Therefore, the rice milling machine itself has become large.

Japanese Unexamined Patent Publication No. 2000-126625

The present invention has been made in view of the above problems, and an object of the present invention is to simplify the structure near the upper part of the rice milling machine body and to prevent the rotating part from being exposed during the rice milling operation. Is to provide a device that reduces the size of the rice milling machine as a whole while giving sufficient treatment.

(1) In order to achieve the above object, the present invention has a rice milling container having a celestial cylindrical shape that opens on the lower surface and a specified amount of rice to be charged, and a celestial cylindrical shape that opens on the lower surface. A rice bran container that covers the whole, a bottom cover body that closes the lower surface opening of the rice milling container and the lower surface opening of the rice bran container, a rotation shaft provided perpendicular to the bottom cover body, and rice milling blades provided on the rotation shaft. The bottom cover body includes a motor for rotationally driving the rotation shaft, and closes the lower surface opening of the rice bran container while closing the lower surface opening of the rice milling container to integrally fix the rice milling container and the bran container. We propose a rice milling machine characterized in that the bran container containing the rice milling container is exposed to the outside of the rice milling machine main body.

(2) Further, a rice milling container having a cylindrical shape that opens on the upper surface and the lower surface and for charging a specified amount of rice, a bottom cover body that closes the lower surface opening of the rice milling container, and a rotation shaft provided perpendicular to the bottom cover body. The rice milling blades provided on the rotating shaft, the bran container having a celestial cylindrical shape opening on the lower surface, the top of which abuts on the upper surface of the rice milling container and covers the entire rice milling container, and the rotating shaft are rotated. We propose a rice milling machine equipped with a driving motor and characterized in that the bran container is exposed to the outside of the rice milling machine main body.

(3) In the rice milling machine proposed above, it is desirable that the bran container is made of a transparent material.

In the present invention, the rice milling container and the bran container are each formed in a celestial cylindrical shape that opens on the lower surface, the rice milling container is housed inside the bran container, and the lower surface opening of the bran container and the rice milling are provided in one same bottom cover body. The opening on the bottom surface of the container is fixed and integrally combined. Then, an integrated structure in which a specified amount of rice is put into the rice milling container is attached to the rice milling machine body with the bottom cover body facing down, and the rotational driving force of the motor is applied to the bottom cover body. It is transmitted to the rice milling blades via the provided rotating shaft to perform the rice milling operation. With this configuration, there is no lid on the upper part of the bran container, and rice is put into the rice milling container, which has been performed through the upper lid, through the bottom cover in the present invention. Therefore, the structure for fixing the bran container and the lid, which was required for the upper part of the rice milling machine body, and the detection structure for whether or not the lid is attached can be eliminated, and the structure near the upper part of the rice milling machine body is simplified. can do. In addition, since it is not necessary to raise the shape of the rice milling machine body to the upper part of the rice bran container, the degree of freedom in the layout of the parts and devices constituting the rice milling machine body is increased, and the rice milling machine as a whole can be miniaturized. Further, by forming the bran container with a transparent material, it is possible to confirm how the rice is being removed during the rice milling operation.

It is explanatory drawing which shows the whole structure of the rice milling machine which concerns on 1st Example of this invention. It is a structural exploded view of the rice milling machine which concerns on 1st Example of this invention. It is explanatory drawing which shows the assembly method of the rice milling machine which concerns on 1st Example of this invention. It is explanatory drawing which shows the rice milling time by the rice amount / rice milling degree. It is explanatory drawing which shows the whole structure of the rice milling machine which concerns on 2nd Example of this invention.

<Example 1>
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of the rice milling machine according to the embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the configuration of the rice milling machine in an exploded manner.
Reference numeral 1 denotes a main body case, which is provided with a top plate 2 at a lower position one step lower than the upper end thereof, and forms a motor chamber 3 inside the main body. On the upper surface of the top plate 2, the outer surface of the main body case rises and surrounds the peripheral edge of the top plate 2 in the shape of a peripheral wall, and a tray-shaped mounting portion 4 is formed. A motor 6 is provided on the surface of the top plate 2 facing the motor chamber 3 via a boss 5. The rotating shaft 7 of the motor 6 penetrates the bulging portion 8 formed in the central portion of the top plate 2 and projects toward the mounting portion 4, and the lower coupling 9 is provided at the upper end thereof.

Reference numeral 10 denotes a bottom cover body that closes the lower opening of the bran container and the rice milling container, which will be described later. A rotating shaft 11 is penetrated through the center of the bottom cover body, and a rice milling blade 12 is attached to the upper end of the rotating shaft 11 and a lower portion at the lower end. An upper coupling 13 that connects to the coupling 9 is attached. Then, on the outer bottom surface of the bottom cover body 10, a mounting cylinder portion 10-2 that is externally fitted to the bulging portion 8 of the top plate 2 is formed, and the mounting cylinder portion 10-2 and the bulging portion 8 are combined. As a result, the upper coupling 13 and the lower coupling 9 are connected so that the rotational driving force of the motor 6 is transmitted to the rice milling blade 12. Further, a convex portion 10-1 projecting in the horizontal direction is provided on the outer edge of the bottom cover body 10.

Reference numeral 14 denotes a rice milling container, which is formed of a metal mesh material having a mesh smaller than that of rice grains or a punching plate that has been perforated. The rice milling container 14 has a celestial cylindrical shape with an open lower surface and a closed upper surface, and has a structure in which the lower surface opening 14-1 can be fitted to the bottom cover bulging portion 10-3. There is. By fitting the lower surface opening 14-1 of the rice milling container 14 to the bottom cover bulging portion 10-3, the lower surface opening 14-1 is closed, and the inside of the rice milling container 14 becomes a closed space for rice milling operation. A space to do is formed.

Reference numeral 15 denotes a bran container, which is made of a transparent material or a translucent material, and has a celestial cylindrical shape with an open lower surface and a closed upper surface. The lower surface opening 15-1 of the bran container 15 is provided with a thread 15-3 on the inner circumference of the edge thereof, and is detachably screwed to a screwing portion 10-4 provided in an annular shape on the bottom surface of the bottom cover body 10. It has a possible structure. Then, when screwed, the convex portion 15-2 provided on the outer edge of the bran container 15 overlaps with the convex portion 10-1 provided on the bottom cover body 10, and is convex with the end portion of the convex portion 15-1. It is configured so that the ends of the portions 15-2 are flush with each other. The bottom opening 15-1 is closed by screwing the bran container 15 to the screwing portion 10-4 with the rice milling container 14 housed inside the bran container 15, and the rice bran container 14, the bran container 15 and the bottom cover are closed. The body 10 and the body 10 are combined together. The one-piece structure combined in this way has a convex portion 10-1 and a convex portion 15 in a state of being overlapped with a groove portion 16 provided inside the upper edge portion of the mounting portion 4 provided on the main body case 1 side. -2 has a structure that can be engaged with, and by engaging with the structure, the integrated structure can be fixed to the mounting portion 4. Then, although not particularly shown, a safety switch that performs a switching operation when the convex portion 10-1 and the convex portion 15-2 in an overlapping state are engaged with the groove portion 16 of the mounting portion 4 at a normal position is provided. When this safety switch is turned on, it is determined that the integrated structure in which the rice milling container 14, the bran container 15, and the bottom cover body 10 are combined is accurately attached to the main body case 1. , The circuit configuration enables the motor 6 to be started.

Reference numeral 20 denotes a power switch and 21 is a rice milling adjustment switch, each of which is provided on the outer surface of the main body case 1 and operates a motor drive circuit 22 built in the main body case 1. Reference numeral 23 denotes a rotation detection element, which detects the protrusions of the disk 24 attached to the rotation shaft 7 of the motor 6, detects the rotation of the motor 6, and outputs a pulse signal. As the rotation detection element 23, a known configuration such as a Hall element or a photo interrupter that outputs a pulse signal due to changes in magnetism, photoelectric, noise, or the like is adopted.

The power switch 20 is a switch that turns on / off the motor 6, and has an LED lamp for checking the operation embedded therein. It can be confirmed that the power switch 20 is in the energized state by lighting in red. The rice milling adjustment switch 21 selects the degree of polishing of brown rice by the rotation position of the volume knob. In this embodiment, the degree of polishing can be selected from 3 minutes, 5 minutes, 7 minutes, and white rice. There is. The stage of the degree of milling is not limited to these.

The motor drive circuit 22 starts the motor 6 in response to an input operation by the power switch 20, and detects the amount of rice from the load (voltage value, current value, power consumption, etc.) of the motor 6. Then, the rice milling time is determined according to the detected amount of rice. When the rice milling operation based on the determined rice milling time is started, the rotation speed of the motor 6 is detected by receiving a pulse signal from the rotation detection element 23 during the rice milling operation, and this rotation speed is the amount of rice, the degree of milling, and the progress of rice milling. The operation of the motor 6 is controlled so as to be constant regardless of the degree.

The rice milling machine configured in this way is prepared by the procedure shown in FIG. 3 prior to the rice milling operation.
(Procedure a) Attaching the rice milling container A predetermined amount of brown rice is put into the rice milling container 14, and the bottom opening 14-1 of the rice milling container is fitted into the bottom cover bulging portion 10-3 of the bottom cover body 10 to be attached. At this time, the rice milling blade 12 is attached to the rotating shaft 11 of the bottom cover body 10 in advance, the rice milling blade 12 is housed inside the rice milling container 14, and the rice milling container 14 and the bottom cover body 10 are fitted. To do.

(Procedure b) Installation of the bran container The rice bran container 14 attached to the bottom cover body 10 is covered with the bran container 15, and the rice bran container 15 is fixed to the bottom cover body 10 with the rice milling container 14 housed inside the bran container 15. To do. At this time, the thread 15-3 formed on the lower surface opening edge of the bran container 15 is screwed to the threaded portion 10-4 of the bottom cover body to fix the bran container 15.

(Procedure c) Placement on the main body case The top and bottom of the integrated structure consisting of the rice milling container 14, the bran container 15, and the bottom cover body 10 combined according to the steps a and b are reversed, and then the top and bottom of the main body case 1 side It is attached to the mounting portion 4. In this case, the mounting cylinder portion 10-2 of the bottom cover body 10 is externally fitted to the bulging portion 8 of the top plate 2 and positioned, and the lower coupling 9 and the upper coupling 13 are joined to form the motor 6. The rotating shaft 7 and the rotating shaft 11 of the bottom cover body 10 are directly connected.

(Procedure d) Fixing to the main body case In step c, the overlapping convex portions 10-1 and 15-2 of the integral structure mounted on the mounting portion 4 are provided inside the upper edge portion of the mounting portion 4. Engage with the groove portion 16. By engaging the convex portion 10-1 and the convex portion 15-2, which are laminated with their end faces flush with each other, at a normal position with respect to the groove portion 16, a safety switch (not shown) shows a properly engaged state. It is detected and the drive of the motor 6 is permitted.

When the motor 6 is driven through such a procedure, the rotation of the motor rotating shaft 7 is directly transmitted to the rotating shaft 11 of the bottom cover body 10, and the rice milling blade 12 attached to the rotating shaft 11 is rotationally driven to mill rice. The brown rice in the container 14 can be convoluted. The convection of rice causes the rice to rub against each other, scraping the surface of the rice and scraping off excess bran. The peeled bran is discharged to the outside from the mesh of the rice milling container 14 and stored in the space formed between the rice milling container 14 and the bran container 15.

Hereinafter, the rice milling operation in the rice milling machine of this embodiment will be described.
The rice milling operation is started by setting each member of the brown rice and the rice milling machine in the above procedure, selecting the desired rice milling degree with the rice milling adjustment switch 21, and turning on the power switch 20. During the rice milling operation, the motor drive circuit 22 receives a pulse signal from the rotation detection element 23, detects the rotation speed of the motor 6, and controls the motor 6 so that the rotation speed becomes constant. When the rice milling time according to the degree of rice milling elapses, the motor 6 is stopped and the operation is terminated.

In the rice milling machine of this embodiment, the rotation speed of the controlled motor 6 is set to be within the range of N (target rotation speed) ± 100 rpm, and the rice milling time is changed according to the amount of rice and the degree of whitening. .. For example, as shown in FIG. 4, the rice polishing time is set to t1 minutes for 3 minutes of 0.5 go and the rice polishing time of t16 minutes for white rice of 2.0 go. When setting the rice with embryos, the number of revolutions is reduced and the rice milling time is lengthened as a measure for increasing the residual rate of germs in brown rice. In addition, when setting the rice sharpening, the rotation speed is set lower than the rotation speed during the rice milling operation.

During the rice milling operation, the rotation speed is always detected, and the rotation speed of the motor 6 is rotated so as to be the rotation speed N (target rotation speed) ± 100 rpm during rice milling regardless of the setting of the amount of rice and the degree of rice milling. Be controlled. 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 load of rotation changes depending on the progress of processing. Therefore, in the motor drive circuit 22, control is performed such that the rotation speed is increased when the rotation speed is lower than the above-mentioned reference rotation speed and is decreased when the rotation speed is increased.

When the rice milling blade 12 is rotated by the drive control of the motor 6 performed in this way, the rice in the rice milling container 14 is given a rotational movement and a vertical movement, and the rice grains rub against each other and the skin is peeled off. .. Then, the peeled bran is blown from the mesh portion of the rice milling container 14 into the space formed between the rice milling container 14 and the bran container 15. The bran container 15 is made of a transparent material such as plastic or glass, and the state of rice milling operation can be observed from the outside.

After the rice milling is completed, the integrated structure consisting of the rice milling container 14, the bran container 15, and the bottom cover body 10 is removed from the main body case 1, the top and bottom are turned upside down, and the bran container 15 is first placed with the bottom cover body 10 facing up. Remove, then remove the rice milling container 14. As a result, rice remains in the rice milling container 14 and bran remains in the bran container 15, and each of them can be taken out and used.

<Example 2>
Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, the overall shape of the rice milling container 14 has a cylindrical shape that opens on both the upper surface and the lower surface. The lower surface opening 14-1 has a structure that can be fitted to the bottom cover bulging portion 10-3 as in the first embodiment, and the upper surface opening 14-2 is in close contact with the inner surface of the top portion of the bran container 15. It has a shape. Other configurations are the same as those in the first embodiment. By forming the rice milling container 14 in a cylindrical shape in this way, it is possible to reduce the labor of cleaning performed after the rice milling operation is completed.

As a preparatory procedure prior to the rice milling operation, first, the lower surface opening 14-1 of the rice milling container is fitted and attached to the bottom cover bulging portion 10-3 of the bottom cover body 10, and then the upper surface opening 14- of the rice milling container is attached. From step 2, put a predetermined amount of brown rice into the rice milling container. Then, the bran container 15 may be covered from above, and the screw thread 15-3 formed on the lower surface opening edge of the bran container 15 may be screwed and fixed to the threaded portion 10-4 of the bottom cover body. By screwing the bran container 15 to the bottom cover body 10 side, the upper surface opening 14-2 is brought into close contact with the inner surface of the top of the bran container 15 having a celestial cylindrical shape, and a closed space is formed in the rice milling container 14. To. As a result, only the bran is discharged to the outside from the mesh of the rice milling container 14 during the rice milling operation, and it is possible to prevent the brown rice from popping out.

Although this device is configured as described above, the present invention is not limited to the above configuration. For example, in the above-mentioned device, the rotation speed is always constant regardless of the amount of rice and the degree of rice milling, but for example, even if the rotation speed is set according to the amount of rice and the rice milling time is kept constant. Good. Further, the motor 6 may be driven intermittently. By intermittently operating the motor 6, the rice repeats inflection due to the convection action when the rice milling blade 12 rotates and the settling action when the rice milling blade 12 stops, and the inflection of the rice causes the rice to be milled. It has the effect of reducing the polishing time due to friction with the inner surface of the container and increasing the polishing time due to friction between rice grains, and as a result, the rice polishing time is shortened and the temperature rise of rice is suppressed.

1 Main body case 6 Motor 10 Bottom cover 11 Rotating shaft 12 Rice milling blade 14 Rice milling container 14-1 Bottom opening of rice milling container 15 Bran container 15-1 Bottom opening of bran container 20 Power switch 21 Rice milling adjustment switch 22 Motor drive circuit

Claims (3)

A rice milling container that has a heavenly cylindrical shape that opens on the lower surface and is filled with a specified amount of rice, a bran container that has a heavenly cylindrical shape that opens on the lower surface and covers the entire rice milling container, an opening on the lower surface of the rice milling container, and the above. The bottom cover is provided with a bottom cover body that closes the lower surface opening of the bran container, a rotation shaft provided perpendicular to the bottom cover body, a rice milling blade provided on the rotation shaft, and a motor for rotationally driving the rotation shaft. The body closes the lower surface opening of the rice milling container while closing the lower surface opening of the rice bran container to integrally fix the rice milling container and the bran container, and the bran container containing the rice milling container is outside the rice milling machine main body. A rice mill that is characterized by being exposed to the rice. A rice milling container that has a cylindrical shape that opens to the upper and lower surfaces and is filled with a specified amount of rice, and a heavenly cylindrical shape that opens to the lower surface, and the inner surface of the top abuts the upper surface of the rice milling container and the entire rice milling container. A rice milling container to cover, a bottom cover body for closing the lower surface opening of the rice milling container and the lower surface opening of the rice milling container, a rotation shaft provided perpendicular to the bottom cover body, a rice milling blade provided on the rotation shaft, and the rotation. The bottom cover body includes a motor for rotating a shaft, and closes the lower surface opening of the rice milling container while closing the lower surface opening of the rice milling container to integrally fix the rice milling container and the rice milling container. A rice milling machine characterized in that the bran container containing the container is exposed to the outside of the rice milling machine main body. The rice milling machine according to claim 1 or 2, wherein the bran container is made of a transparent material.

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