JP2018167144A - Rice milling machine - Google Patents

Abstract

PURPOSE: To provide a rice milling machine which can discriminate a rice quantity even when the rice quantity is little in such a case as to detect the rice quantity from the number of motor revolutions.SOLUTION: A motor control part 28 which automatically detects a rice quantity to be milled and controls a motor 6 with a time and the number of revolutions in accordance with the detected rice quantity and the preset degree of milling of rice is provided. The motor control part 28 sets a first judgment which judges the rice quantity with a time t until the prescribed number of revolution is detected by a revolution number detection element 26 since the starting of the milling and a second judgment which judges the rice quantity with the number r of revolutions which is detected by the revolution number detection element 26 after a prescribed time T since the starting of milling, and has a function of specifying the rice quantity with the second judgment on the basis of the judgment on the first judgment when the rice quantity cannot be specified by the first judgment.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rice milling machine that convects rice in a rice milling container having a milling unit and mills brown rice or white rice at home.

  As is known from Patent Document 1, etc., a convection-type rice mill is a metal net-like material polished rice basket (rice-removal part) into which rice (brown rice) is introduced, and a rice bowl in which the polished rice basket is accommodated at intervals. It has a container, a rice milling blade provided at the bottom of the polished rice basket, and a lid attached to the upper surface of the rice bran container, and by rotating the rice milling wing, convection of brown rice in the rice polishing basket, the rice or the rice and the rice polishing basket The rice bran layer is peeled off by friction with the inner surface.

  In convection-type rice mills, the temperature rise of rice and the generation of broken rice are permanent issues. As the temperature of the rice rises, the moisture contained in the rice evaporates, resulting in overdried rice with a reduced moisture content in the rice. Over-dried rice having a moisture content of 14% or less cracks due to water immersion during cooking, and the starch of the rice flows out into the water as glue, so it becomes sticky and poor-tasting rice. The same is true for broken rice, and subdivided rice is not visually appealing.

  In addition to the friction between the rice and the inner surface of the polished rice basket, the temperature rise and the occurrence of broken rice due to the polished rice may differ from the amount of rice selected in the rice hopper, resulting in excessive rice polishing. is assumed. For this reason, in Patent Document 1, it is proposed to automatically detect the amount of rice in the rice hopper based on the number of rotations of the motor, and to perform the rice polishing with an appropriate rice polishing time and number of rotations according to the detected amount of rice. ing.

  Now, when automatically detecting the amount of rice, it is required to detect the amount of rice in at least 0.5 unit (preferably 0.25 unit) in order to ensure the quality of polished rice in a small amount. When the amount of rice is detected based on the rotational speed of the motor as in Patent Document 1, the smaller the amount of rice, the more unstable the rotational speed of the motor, making it difficult to accurately detect the amount of rice.

Japanese Patent No. 3997655

  Therefore, an object of the present invention is to provide a rice mill that can discriminate even a small amount of rice when detecting the amount of rice from the number of rotations of the motor.

  In order to solve such a problem, a rice milling container having a dehulling portion smaller than the grain of rice, a rotation driving means for convection of rice in the rice milling container, and a rotation speed detection means for detecting the rotation speed of the rotation driving means Operation switch for starting and stopping rice milling, setting switch for setting the degree of milling, and automatic detection of the amount of rice contained in the milled rice container, and the time and rotation according to the detected rice volume and the set degree of milling Control means for controlling the rotational drive means with a number, the control means determining the amount of rice in the time from the start of rice milling with the operation switch until the specified rotational speed is detected with the rotational speed detection means And the second determination for determining the amount of rice based on the number of rotations detected by the rotation number detection means after a specified time from the start of rice milling with the operation switch, and when the amount of rice could not be specified in the first determination Second determination based on the determination in the first determination Characterized by comprising a function for identifying the rice amount.

  According to the present invention, if the time from the start of rice milling until reaching the specified rotational speed is within the determination range given for each rice amount, the rice amount is specified. Since it has a function to identify the amount of rice based on the motor speed detected after a specified time from the start, it is possible to accurately determine the amount of rice even with a small amount of rice. Prevents temperature rise and cracked rice generation, and even when cooked, good-tasting rice can be obtained.

It is an internal sectional view of the rice milling machine of the present invention. It is a composition exploded view of this rice mill. It is explanatory drawing which shows the assembly method of this rice polishing machine. It is a flowchart figure of rice quantity detection. It is explanatory drawing which shows a rice amount detection map. It is explanatory drawing which shows the rice milling time and rotation speed map according to the amount of rice / milling degree.

The configuration of the rice mill will be described with reference to FIGS.
Reference numeral 1 denotes a main body case, the interior of which is partitioned vertically by a partition wall 2, a motor chamber 3 is formed in a lower space, and a storage chamber 4 is formed in an upper space. A motor 6 is provided on the partition wall 2 of the motor chamber 3 via a boss 5. The rotation shaft 7 of the motor 6 projects through the bulging portion 8 at the center of the bottom surface of the partition wall 2 and protrudes toward the accommodating portion 4, and a lower coupling 9 is provided at the upper end thereof. The motor 6 employs a DC brush motor that outputs high torque and high rotation speed.

  Reference numeral 10 denotes a container, which is housed in the housing chamber 4 of the main body case 1 and has a cylindrical portion 11 surrounding the rotating shaft 7 and the lower coupling 8 of the motor 6 at the center of the bottom surface. The cylindrical portion 11 uses both a function of ensuring the storage space for the ridge so that the ridge does not spill into the storage chamber 4 of the main body case 1 and a function for positioning the polished rice basket, which will be described later.

  Reference numeral 12 denotes a polished rice basket, which is formed from a metal mesh material having a mesh smaller than that of the rice grain or a punched punching plate. A disc-shaped bottom plate 13 is attached to the inner bottom surface of the polished rice basket 12, and an attachment cylinder portion 14 that is fitted around the cylindrical portion 11 of the rice bran container 10 is attached to the outer bottom surface. A rotating shaft 15 is passed through the center of the bottom plate 13 and the mounting cylinder portion 14, a rice milling blade 16 is attached to the upper end of the rotating shaft 15, and an upper coupling 17 connected to the lower coupling 9 is attached to the lower end. It has been. Moreover, the screw part 18 is formed in the outer peripheral surface of an upper surface opening part.

  The rice milling blades 16 are fixed to the rotary shaft 15 and form a horizontal plane that extends horizontally along the inner bottom surface of the milled rice basket 12 and a rising surface in which the tip of the horizontal plane rises along the inner surface of the rice milling basket 14. Made up of blades. The horizontal surface of the rice milling blade 16 is twisted so that the side that precedes the rotational direction is lower than the side that follows, the rice is lifted from the inner bottom surface of the rice mill 12 and the milled rice basket 12 is subjected to centrifugal force. Move to the inner peripheral surface. The rising surface of the rice milling blade 16 moves the rice moved to the inner peripheral surface of the polished rice basket 12 along the horizontal plane upward along the inner peripheral surface of the polished rice basket 12.

  A rice container 19 is formed in a cup shape with a permeable or semi-permeable material, and has a screw portion 20 into which the screw portion 18 of the polished rice basket 12 is screwed. On the outer peripheral surface of the rice container 19, a scale 21 for measuring rice is provided, and the function of the measuring cup is also used. The scale 21 may be expressed as a combined number when white rice is used or as a rice amount when brown rice is used. That is, since brown rice 200cc becomes white rice 180cc by milling, it may be described on the scale as brown rice 200cc or white rice 1 unit. In this example, the scale 21 is provided in units of 0.5 go from 0.5 go to 2 go.

  Moreover, the convex part 23 engaged with the groove part 22 provided in the opening inner edge of the accommodating part 4 is formed in the opening outer edge of the rice container 19, and the rice container 19 is attached by engaging the convex part 23 with the groove part 22. It is fixed to the upper surface of the main body case 1. Although not particularly shown, the rice bran container 10, the polished rice basket 12, and the rice container 19 are accurately placed in the main body case 1 at the position where the convex portion 23 of the rice container 19 is switched by engaging with the groove portion 22 of the accommodating portion 4. A safety switch for detecting that the motor 6 is attached is provided, and the motor 6 is not started unless the safety switch is turned on.

  Reference numeral 24 denotes a power switch and reference numeral 25 denotes a milling degree adjustment switch, which are provided on the front surface of the main body case 1, respectively. The power switch 24 is a switch for turning the motor 6 ON / OFF. An LED lamp is embedded and the energized state can be confirmed by lighting in red. The milling degree adjustment switch 25 is used to select the degree of milling of brown rice at the rotation position of the volume knob. In this example, the milling degree can be selected from 3 minutes, 5 minutes, 7 minutes, and white rice. Yes. The stage of the degree of milling is not limited to these, and the form of the switch is not limited to the volume knob, and any system such as a slide knob or key switch can be adopted.

  Reference numeral 26 denotes a rotation detecting element that detects a protruding piece of a disk 27 attached to the rotating shaft 7 of the motor 6 and outputs a pulse signal. A motor control unit 28 receives the input of the power switch 24 and activates the motor 6, receives a pulse signal from the rotation detection element 26, detects the rotation speed of the motor 6, and based on the rotation speed of the motor 6. The motor 6 is controlled with a drive time and a rotational speed that correspond to the amount of rice to be detected and the degree of milling selected by the milling degree adjustment switch 25. The rotation detection element 27 employs a known configuration that outputs a pulse signal by a change in magnetism, photoelectricity, noise, or the like, such as a Hall element or a photo interrupter.

The rice milling machine configured as described above is prepared by the following procedure shown in FIG.
(Procedure a) A predetermined amount of brown rice is put in a rice container 19 and a rice basket 12 is attached.
In this procedure a, the rice container 19 is used as a measuring cup, the brown rice is weighed using the scale 21 as a guide, and the screw portion 20 provided on the inner surface of the rice container 19 is connected to the screw portion provided on the outer surface of the polished rice basket 12. 18 is screwed and screwed in a state in which the upper surfaces face each other. As a result, a larger amount of rice than the capacity of the polished rice basket 12 can be set.

(Procedure b) The bag container 10 is attached to the main body case 1.
In this procedure b, the basket container 10 is set in the housing part 4 of the main body case 1, and the bag container 10 is attached to the main body case 1. As a result, the rotating shaft 7 and the lower coupling 9 projecting from the bottom of the housing part 4 are exposed from the cylindrical part 11 of the container 10.

(Procedure c) The milled rice basket 12 is attached to the rice bran container 10.
In this procedure c, the polished rice basket 12 to which the rice container 19 is attached in the procedure a is inverted and mounted on the main body case 1, and the polished rice basket 12 is accommodated in the rice bran container 10. As a result, the mounting cylinder portion 14 of the polished rice basket 12 is externally fitted and positioned on the cylindrical portion 11 of the rice bran container 10, the lower coupling 9 and the upper coupling 13 are joined, and the rotating shaft 7 of the motor 6 and the polished rice are joined. The rotating shaft 15 of the car 12 is directly connected.

(Procedure d) The rice container 19 is fixed to the upper surface of the main body case 1.
This procedure d fixes the rice container 19 to the upper surface of the main body case 1 by engaging the convex part 23 formed in the outer edge of the rice container 19 with the groove part 22 provided in the upper surface opening inner edge of the accommodating part 4. Is. This state is detected by a safety switch (not shown), and driving of the motor 6 is permitted.

Hereinafter, the rice milling operation in this rice mill will be described.
In steps (a) to (d), each component of the brown rice and the rice mill is set, the desired rice milling degree is selected by the rice milling degree adjustment switch 25, and the motor 6 is driven by inputting the power switch 24. By driving the motor 6, the rotation of the motor rotation shaft 7 is directly transmitted to the rotation shaft 15 of the rice mill 12, and the rice blades 16 attached to the rotation shaft 15 are rotationally driven to convect the brown rice in the rice mill 12. The convection of the rice causes the rice to rub against each other, scraping the surface of the rice and scraping off excess rice cake. The peeled cocoons are discharged from the mesh of the polished rice basket 12 to the cocoon container 10 and stored in the cocoon container 10.

  The motor control unit 28 automatically detects the amount of rice set, and controls the motor 6 with the rotation drive time and the number of rotations according to the detected rice amount and the set rice milling degree. During milling, the rotational speed of the motor 6 is detected by receiving a pulse signal from the rotation detection element 26, and the motor 6 is controlled so that the rotational speed is constant. When the milling time corresponding to the degree of milling has elapsed, the motor 6 is stopped and the process is terminated.

Next, automatic detection of the amount of rice will be described.
The amount of rice is first determined by the elapsed time t when the rotational speed of the motor 6 reaches a predetermined value R. FIG. 4 shows a rice amount determination map for each elapsed time. Specific areas A1 to A4 for specifying the rice amount according to the elapsed time t when the predetermined value R is reached, and indefinite to hold the specification of the rice amount. Areas Z1 to Z3 are provided. In addition, rice quantity judgment of this example is divided so that the amount of rice from 0.5 go to 2.0 go can be specified in 0.5 go units, and the number of division is not particularly limited, and it should be subdivided Makes it possible to detect the amount of rice more precisely.

  The specific areas A1 to A4 are ranges in which the rice amount can be uniquely specified from the elapsed time t when the predetermined value R is reached, and when the elapsed time t belongs to the specific areas A1 to A4, the corresponding rice amount Is identified. On the other hand, the indeterminate areas Z1 to Z3 are provided to allow variation in rice quantity detection due to individual differences in voltage, frequency, and equipment. When the elapsed time t belongs to the indeterminate areas Z1 to Z3, rice milling starts. The second determination is made based on the number of rotations r detected when the specified time T elapses.

FIG. 5 shows a flowchart of rice quantity determination.
When rice milling starts, the elapsed time starts counting (1), and the number of rotations of the motor 6 is detected based on the pulse signal from the rotation detection element 26 (2). When the specified time T has elapsed since the start of rice polishing (3), the rotational speed r at that time is stored (4). When the rotational speed of the motor 6 reaches a predetermined value R (5), the rice amount is determined based on the rice amount determination map shown in FIG. 4 in accordance with the elapsed time t from the start of rice milling.

  That is, if the elapsed time t up to the rotation speed R is less than t1 (6), the rice quantity belongs to the specific area A1, and thus the rice amount is specified as 0.5. If the elapsed time t is in the range from t1 to less than t2 (7), since it belongs to the indefinite area Z1, the detected rotational speed r stored in the process (4) is compared with the judgment value r1 (8), and the judgment value r1 or more. If it is less than the determination value r1, 1.0 is specified.

  If the elapsed time t up to the rotation speed R is in the range from t2 to less than t3 (9), the rice quantity belongs to the specific area A2, and therefore the rice quantity is specified as 1.0. If the elapsed time t is in the range from t3 to less than t4 (10), since it belongs to the indefinite area Z1, the detected rotational speed r stored in the process (4) is compared with the judgment value r2 (11), and the judgment value r2 or more. If it is less than the determination value r2, it is specified as 1.5 go.

  If the elapsed time t up to the rotational speed R is in the range from t4 to less than t5 (12), the rice quantity belongs to the specific area A3, and thus the rice quantity is specified as 1.5. If the elapsed time t is in the range from t5 to less than t6 (13), since it belongs to the indefinite area Z1, the detected rotational speed r stored in the process (4) is compared with the judgment value r3 (14), and the judgment value r3 or more. If it is less than the determination value r3, 2.0 is specified. If the elapsed time t up to the rotation speed R is t6 or more, it belongs to the specific area A4, so that the rice amount is specified as 2.0.

  Note that the numerical values (time t1 to t6, determination values r1 to r3) and the rotation speed R / specified time T of these rice amount determination maps are determined based on a preliminary test.

  When the rice amount detection is completed, the motor 6 is controlled with the rotational speed N corresponding to the detected rice amount and the rice polishing time A corresponding to the set rice polishing degree. In this apparatus, as shown in FIG. 6, rice milling time A1 is set for 3 minutes, rice milling time A4 is set for white rice, rotation speed N1 is set to 0.5, and rotation speed N4 is set to 2.0. In addition, when the setting of the germ rice can be performed, as the treatment for increasing the germ remaining rate in the brown rice, the rotation speed is decreased and the rice milling time is lengthened. Moreover, when the setting of rice sharpening can be performed, it is set lower than the rotation speed at the time of milling.

  During the rice milling operation, the rotational speed is always detected, and the rotational speed of the motor 6 is controlled to be N ± 100 rpm. 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, the motor drive circuit 26 performs control to increase when the rotational speed is lower than the reference rotational speed and decrease when the rotational speed is higher.

  When the milled rice blade 16 rotates by driving the motor 6 as described above, the rice in the milled rice basket 12 and the rice container 19 is rotated and moved up and down, and the rice grains rub against each other and the epidermis is peeled off. The peeled cocoons are blown into the cocoon container 10 from the mesh portion of the polished rice basket 12. The rice container 19 is made of a transparent material such as plastic or glass, and the state of the polished rice can be observed from the outside.

  After the completion of the rice polishing, the rice basket 12 and the rice container 19 are removed from the main body case 1 and the rice basket 12 is removed from the rice container 19 so that the rice remains in the rice container 19 and the rice bran container 10 remains. Can be used. According to the applicant's test, brown rice was ground at a weight ratio of 10% by the milling operation up to white rice.

  Further, an increase in the degree of milling by the milling degree adjustment switch 25 can be accepted within a certain time after the completion of the milling, and the time for the degree of milling increased by the number of rotations based on the amount of rice can be extended. For example, when 1.0-milled brown rice is milled for 3 minutes, the motor is controlled at N2 during the milling and the milling process ends when the milling time A1 has elapsed. If you want to, within 1 minute from the end of milling, set the milling degree adjustment switch 25 to 5 minutes sowing and then the motor 6 will restart and subtract 3 minutes sowing time A1 from 5 minutes milling time A2. The milled rice can be extended at the rotational speed N2 for the time (A2-A1).

  Although this device is configured as described above, the present invention is not limited to the above configuration. For example, the motor 6 may be driven intermittently. By causing the motor 6 to intermittently operate, the rice is repeatedly inflated by the convection action when the milled rice blade 16 rotates and the sedimentation action when the milled rice blade 16 stops. The effect of reducing the milling time due to friction with the inner surface and increasing the milling time due to friction between the rice grains is achieved. As a result, the rice milling time is shortened and the temperature rise of the rice is suppressed.

  In addition, the shape of the removal portion exemplified as the polished rice basket 12 in the above embodiment is such that the peripheral surface and the bottom surface of the bottomed container are all made of a net or punching plate, and only the peripheral surface is a net or punching plate. It can also be realized by a configuration, or a configuration in which only the bottom surface is configured by a net or a punching plate.

DESCRIPTION OF SYMBOLS 1 Main body case 4 Housing | storage part 6 Motor 10 糠 container 12 Rice mill (rice removal part)
19 Rice container 25 Rice milling adjustment switch 26 Rotation detection element 28 Motor controller

Claims (1)

A rice milling container having a grain removing portion smaller than the rice grains, a rotation driving means for convection of rice in the rice milling container, a rotation detection means for detecting the rotation of the rotation driving means, an operation switch for starting and stopping the rice milling, A setting switch for setting the degree of milling, and automatically detecting the amount of rice contained in the milled rice container from the rotation detecting means, and the rotation driving means at the time and the number of revolutions according to the detected rice quantity and the set degree of milling Control means for controlling,
The control means includes a first determination for determining the amount of rice in the time from the start of rice milling with the operation switch to the detection of the specified rotation speed with the rotation speed detection means, and the start of rice polishing with the operation switch. The second determination for determining the amount of rice based on the number of rotations detected by the rotation number detection means after a specified time is set based on the determination in the first determination when the amount of rice could not be specified in the first determination. A rice mill having a function of specifying the amount of rice in the second determination.

Images