JPH0557203A - Rice polishing equipment - Google Patents

Abstract

PURPOSE:To obtain a rice polishing equipment capable of holding the degree of rice polishing constant by controlling the speed of rotation of the rice polishing equipment in accordance with the residual quantity of rice in a housing chamber, the ambient temperature, moisture content of rice and fluctuation of load. CONSTITUTION:When a rice polishing key 101a and a full automatic key 101b of an operation part 101 are selected and pushed, a signal discrimination part 102 is decided and a driving command means 103 outputs an actuation signal to a driver 108 until a stop signal is inputted from a boiling rice amount calculating means 105 by input of a full automatic selection signal announcing selection sent from the signal discrimination part 102. Thereby a motor 2 is driven. Further, when a command signal for increasing the r.p.m. of a rice polishing machine is inputted from a speed decision means 106, the driving command means 13 outputs a correspondent actuation signal of a rice polishing signal to the driver 108. The r.p.m. of the rice polishing machine M is increased and the throughput is made large and the degree of rice polishing is held constant. Similarly, the r.p.m. N is increased or decreased by a speed redecision means 321 by the combination of a rice residual quantity detection means 105, an ambient temperature detection means 302, a moisture content detection means 109b and a load detection means 332. Thereby the degree of rice polishing is held constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice polishing apparatus for polishing rice in a dry state without using water.

[0002]

2. Description of the Related Art An example of a rice polishing apparatus for polishing rice in a dry state without using water is disclosed in Japanese Patent Laid-Open No. 2-135153. In this rice polishing apparatus, an inner cylinder to be a polishing body and an outer cylinder to be a rice polishing body are loosely fitted in a case and arranged concentrically, and a polishing chamber is formed by these inner cylinder and outer cylinder. An electric motor for driving the inner cylinder is connected in series with this, and the electric motor, the inner cylinder, and the outer cylinder are arranged horizontally. Then, one side of the rice polishing room is connected to the hopper for rice supply arranged in the upper part, and the other side of the rice polishing room is connected to the rice outlet, so that the rice weighed and supplied from the hopper can be connected. The rice is polished and polished while passing through the polishing chamber, and all the polished and polished rice in the polishing chamber is collected in the rice pan located below the rice outlet.

[0003]

As described above, the conventional rice polishing apparatus is composed of the electric motor and the horizontal type in which the inner cylinder and the outer cylinder are arranged side by side in series, so that the apparatus is occupied. There was a drawback that the space was inevitably large when viewed from above.

Further, since the polished rice and the polished rice are collected in the rice saucer disposed below the rice sending port, for example, the rice polishing apparatus is used to perform the subsequent rice cooking process in a series of operations. When integrating the rice cooker with the rice cooker, if the natural drop is used to transfer the rice from the rice pan to the rice cooker, the entire device becomes vertically long. If the natural drop is not used, the rice cooker will be removed from the rice pan. There were various problems, such as the troublesome transportation of rice up to the time, and the possibility of causing troubles.

Therefore, the inner and outer cylinders are loosely fitted in the rice storage chamber so as to be rotatable relative to each other and vertically arranged, and an annular rice-polishing chamber in which the clearance between the inner cylinder and the outer cylinder is changed is provided. While forming, the lower part of the polishing room and the lower part of the storage room are provided in communication with each other, and the rice introduced from the lower part of the storage room to the lower part of the polishing room is transferred to the upper part of the polishing room to grind and trim the embryo. Grinding and blasting with a slit group for cutting, and sending the rice after blasting and blasting from the polishing room according to the amount set externally Reduction and
The present applicant has already proposed a rice polishing device that facilitates the transfer of rice after grinding and polishing.

However, in such a rice polishing apparatus,
When the remaining amount of rice temporarily stored in the storage chamber becomes low, the pressure on the rice at the bottom of the storage chamber from the rice at the top of the storage chamber decreases, and the rice rushing into the rice intake from the storage chamber to the polishing room The pressure was reduced, and as a result, the polishing speed was reduced and the degree of polishing increased too much.

In such a rice polishing apparatus, when the ambient temperature is high, the heat generated during the grinding of rice increases the temperature of the inner cylinder for grinding and the temperature of the rice in contact with the inner cylinder also increases. Therefore, the rice surface layer is softened, and the degree of polishing increases significantly. On the contrary, when the ambient temperature is low, the temperature of the inner cylinder does not rise, the surface layer of the rice that comes into contact with it hardens, and the degree of polishing decreases. There was a problem that the ground rice could not be obtained.

Similarly, there is a problem in that the degree of rice polishing varies depending on the water content of rice and the load applied during grinding, so that uniformly ground rice cannot be obtained.

In view of the above points, an object of the present invention is to provide a rice polishing apparatus capable of maintaining a constant degree of rice polishing even when the amount of rice remaining in the storage chamber is small.

It is another object of the present invention to provide a rice polishing apparatus which can keep the degree of rice polishing constant even if the ambient temperature, the water content of rice, the load, etc. fluctuate.

[0011]

A rice polishing apparatus according to the present invention comprises a rice polishing machine for arranging an inner cylinder and an outer cylinder in a rice storage chamber so as to be rotatable relative to each other, and for grinding and polishing rice. An electric motor for driving the inner cylinder and the outer cylinder of the rice polishing machine, a speed determining means for determining the speed of the electric motor, and a drive control means for controlling the electric motor by the speed determining means.

The remaining rice amount detecting means for detecting the remaining amount of rice in the storage chamber, the speed determining means for determining the speed of the electric motor based on the detection result of the remaining rice amount detecting means, and the speed determining means for determining Drive control means for controlling the electric motor.

Further, a temperature detecting means for detecting the ambient temperature of the outside, a temperature comparing means for comparing the ambient temperature based on the detection result of the temperature detecting means with a preset value, and the rice polishing machine by the temperature comparing means. And a drive control means for controlling the electric motor by the speed determining means.

Further, a water content detecting means for detecting the water content of rice in the storage chamber, a water content comparing means for comparing the water content by the detection result of the water content detecting means with a preset value, and the water content. The comparison means includes a speed determination means for determining the rotation speed of the rice polishing machine, and a drive control means for controlling the electric motor by the speed determination means.

Further, a rotation speed detecting means for detecting the rotation speed of the electric motor or the rotation speed of the inner cylinder or the outer cylinder, and a load comparison for comparing the rotation speed by the detection result of the rotation speed detecting means with a preset value. Means, speed determining means for determining the number of revolutions of the rice polishing machine by the load comparing means, and drive control means for controlling the electric motor by the speed determining means.

[0016]

In the present invention, the degree of rice polishing is kept constant by adjusting the rotation speed of the rice polishing machine according to the remaining amount of rice in the storage chamber, the ambient temperature, the water content of rice, and the variation of the load.

[0017]

EXAMPLES Example 1. The present invention will be described below with reference to illustrated embodiments.

First, the principle of the rice polishing apparatus of this embodiment will be described with reference to FIGS. FIG. 10 is a configuration explanatory view of the rice polishing apparatus as seen from the front side, and FIG. 11 is a sectional view taken along the line AA. In FIG. 10, 1 is a substrate, 2 is an electric motor fixed to the substrate 1 and provided with a reduction mechanism, and 3 is an output shaft thereof. Reference numeral 4 is a drive pulley, 5 is a belt, and 6 is a driven pulley. As the belt 5, here, a timing belt that does not slip during torque transmission is used.
A tooth profile corresponding to the teeth of the timing belt is also formed on the outer circumference of the.

Reference numeral 10 is a main body of the rice polishing apparatus. Reference numeral 20 denotes a cylindrical outer case of the main body 10, which is divided into an upper case 21, an intermediate case 22 and a lower case 23.
Reference numeral 24 denotes a plurality of connecting fittings provided above and below the intermediate case 22, which connects the upper case 21 and the lower case 23 to each other.
Detachably connect the top and bottom of 2. The outer case 20 is made of, for example, a transparent resin, and the vicinity of the lower case 23 is the substrate 1
It is fixed to. Reference numeral 25 is a plurality of columns, and 26 is a mounting plate. The mounting plate 26 is attached to the lower case 23 by the pillar 25.
It is mounted horizontally at a distance below. 27
Is a U-shaped holding frame, and 28 is a tray. The tray 28 is arranged in the holding frame 27 and collects the bran fraction separated by the later-described polishing operation. 31 is an annular lower bearing seat fixed to the lower case 23 and the mounting plate 26, 32 is two ball bearings, 33
Is a drive shaft supported by both ball bearings 32. Drive shaft 33
A driven pulley 6 is attached to the.

Reference numeral 41 denotes an inclined ring fixed in the lower part of the intermediate case 22. On the upper surface of the inclined ring, rice in a storage chamber formed between the intermediate case 22 and an outer cylinder 60 described later is moved toward the center of the ring by its own weight. An inclined surface 42 is provided which is set at an inclination angle sufficient to slide down. Reference numeral 43 is a surface bearing with a flange, and 44 is a driven shaft. The driven shaft 44 is supported by the surface bearing 43 and is connected to the drive shaft 33.

Reference numeral 51 is an upper bearing seat provided on the upper case 21, reference numeral 52 is a surface bearing, reference numeral 53 is a dust seal, and reference numeral 54 is an annular shaft supported by the surface bearing 52. Further, 55 is a top plate fixed to the upper case 21, 56 is a rice feeding path, 5
7 is an outlet. The upper and lower ends of the driven shaft 44 and the annular shaft 54 are formed in a hexagonal shape on the inner surface side in conformity with the outer shape of the outer cylinder 60, and on the outer peripheral side in a circular shape corresponding to the surface bearings 43 and 52 (the driven shaft). (See FIG. 12 for 44).

Reference numeral 60 denotes an outer cylinder, and reference numeral 70 denotes a cylindrical inner cylinder disposed inside the outer cylinder 60 in the axial center XX direction. An annular shaft 54 and a driven shaft 44 are fitted and integrally attached to the upper and lower ends of the outer cylinder 60, and are rotatably supported in the outer case 20 by surface bearings 52 and 43. 63 is a driven shaft 4
4 are intake ports provided at a plurality of positions in the circumferential direction in the upper part of 4.

Reference numeral 71 is a slit which penetrates the inside and outside of the inner cylinder 70. The slit 71 is almost 90 in the middle of the tube portion of the inner tube 70.
As shown in FIG. 12, each of the slits 71 of the angular group is divided by 6 degrees into the axial center X-X direction, and the slits 71 of the angular group form an angle θ with respect to the diameter direction (θ is about 25 degrees in the embodiment). ) It is provided to be inclined. Further, the groove width Ws of the slit 71
Is smaller than the thin thickness Wr of the rice grain and has a size of Ws <Wr, and the opening edge 73 is not chamfered and has an acute angle with a width that does not allow the rice grain to pass through the slit 71 (Fig. 16, see FIG. 17). Of the multiple slits 71 provided in the vertical direction of the tubular portion of the inner barrel 70, the slit 71 in the upper layer portion has an embryo removal nail 72 as shown in an enlarged scale in FIG.
Is provided. The tip of the germ removal claw 72 forms an arc shape, and this portion projects obliquely outside the inner cylinder 70.

Reference numeral 77 is a mesh formed on the upper portion of the inner cylinder 70. The mesh 77 has a thickness of 0.5φ and a length and width of 1
A thin wire made of metal such as stainless steel of about 3 or 4 is woven into a net shape. It is made in a "Yatsuhashi" shape with an arc surface on a strip, and it is an inner cylinder at 90 degree intervals corresponding to the slit 71. It is provided on the peripheral surface of 70. 74 is a fixing plate fixed to the upper end of the inner cylinder 70, and 75 is a fixing screw. The fixing plate 74 is fixed to the upper surface board 55 by fixing screws 75, and functions to restrict the free rotation of the inner cylinder 70 (see FIG. 14).

Reference numeral 76 is a spiral. Spiral 76
Is formed in the middle of the inner cylinder 70 so as to face the intake port 63, and slides down on the inclined surface 42 of the inclined ring 41 to guide the rice taken in from the intake port 63 to the delivery port 57 side. .. The inner cylinder 70 in which the slits 71, the mesh 77, etc. are formed is set to be longer than the outer cylinder 60 on the outer side, is hung from the upper surface plate 55, and passes through the hollow portions of the driven shaft 44 and the drive shaft 33 to the lower end. Are exposed in the holding frame 27.

Reference numeral 12 denotes polished rice before being polished, 13 is polished rice polished by a polishing device, and 15 is a bran mainly containing bran containing germ powder and dust mixed in the polished rice, It is separated from milled rice 12 by polishing rice. 16 is an embryonic hole.

Thus, the annular space formed between the outer case 20 and the outer cylinder 60 is a storage chamber R1 for temporarily storing the rice to be ground, the hexagonal outer cylinder 60 and the circular inner cylinder 70. The annular gap between and forms a rice polishing room R2, and the inner space of the inner cylinder 70 constitutes a recovery duct R3 for recovering the bran fraction 15 separated from the rice polishing 12. Based on the experimental results, the maximum value Lm and the minimum value Ln of the distance in the direction orthogonal to the axis XX of the rice polishing room R2 are Lm ≦ 2Lr and Lr, respectively, when the length of a normal rice grain is Lr. It is selected such that it falls within the range of ≧ Ln (FIGS. 15 and 16).

The polishing operation of the polishing apparatus having such a structure will be described with reference to FIGS. 10 to 18.

First, the milled rice 12 is charged into the storage chamber R1 from the charging path 56 of the upper case 21, and the inclined surface 4 at the bottom is
It is accumulated from 2 and stored. A part of the milled rice 12 thrown into the storage room R1 slides down on the inclined surface 42 and the intake port 63
Invades near the bottom of R2.

When the electric motor 2 is driven at a constant speed, its rotational force is transmitted to the driven pulley 6 on the main body 10 side via the output shaft 3, the drive pulley 4 and the belt 5. The rotational force transmitted to the driven pulley 6 is further transmitted to the drive shaft 33 and the driven shaft 44, and the outer cylinder 60 supported by the surface bearings 43 and 53 at the lower and upper portions is moved in the arrow direction of FIG. The rotation starts in the direction. When the outer cylinder 60 rotates in the forward rotation direction, the milled rice 12 that has slid on the inclined surface 42 of the inclined ring 41 receives pressure from the upper milled rice 12 as well, and from the four intakes 63 into the polishing room R2. Can be forced into. The milled rice 12 that has been pushed in receives the pushing force of the milled rice 12 that has been pushed in subsequently, and the milled rice 12 that has already entered
Along with it, it is pushed up into the rice polishing room R2. At the same time, a force F having horizontal and vertical components Fk and Fv is applied to the rice grains pushed in from the intake 63 and contacting the spiral 76 by the outer cylinder 60 rotating in the forward direction, as shown in FIG. The force F with the inclination of the spiral angle α pushes up the milled rice 12 into the milling room R2 in cooperation with the pushing force by the pressure from the milled surface 12 above the inclined surface 42. The individual rice grains pushed up are separated by a gap Lm due to the difference in cross-sectional shape between the hexagonal outer cylinder 60 that rotates in the forward direction and the fixed inner cylinder 70.
-By changing Ln = δ, the milled rice 12 as an aggregate moves in an irregular direction and is stirred, and the milled rice 12 becomes R.
Ascend within 2.

In this case, the rice grains rising while contacting the inner cylinder 70 are partially fitted into the slit 71 as shown in FIG. 17, and the bran layer on the surface is formed at the opening edge 73 on the sharp corner of the slit 71. It is scraped off. In addition, the bran layer is peeled off even when the rice grains are rubbed together by the weight from the upper layer in the polishing room R2 and the pushing up from the lower layer. Further, the rice grains that have reached the upper part of the polishing room R2 are rubbed and polished by the mesh having the arc surface of the mesh 77. Moreover, the surface of each rice grain is polished by the friction of the rice comrades. Then, the scraped bran fraction and small dust mixed in pass through the gap between the slit 71 and the mesh 77 as the bran fraction 15 toward the recovery duct R3 side to be separated from the milled rice 12 and fall through the recovery duct R3. It is then collected in the tray 28. In this way, the white rice 13 pushed up to the upper part of the rice polishing chamber R2 while being ground and polished in the dry state and sent out from the delivery port 57 is delivered to the set amount while being weighed by an external weighing unit (not shown). It is sent from 57. Then, when the set amount is reached, the electric motor 2 is stopped, and the sent white rice is then moved to the rice cooking process, put into the rice cooker, heated with an appropriate amount of water and cooked.

Here, if the amount of milled rice 12 introduced into the rice polishing room R2 is Q, the degree of rice polishing is K, and the rotation speed of the outer cylinder 60 is N, there is a relationship as shown in FIG. Polished rice 1
As shown by the curve q, the delivery amount Q of 2 increases as the speed increases from the low speed, reaches a constant value when n2 is exceeded, and sharply decreases when n3 is exceeded. On the other hand, the polishing rate K indicated by the curve k shows a higher value at a low speed near n1 where the delivery amount Q is small, and decreases in inverse proportion to the increase in the rotation speed N. Therefore, by selecting the rotation speed N of the outer cylinder 60 near the rotation speed na corresponding to the point p at which the two curves q and k intersect, it is possible to keep the efficiency of rice polishing high.
Further, by utilizing the relationship that the characteristic of the curve k is almost inversely proportional to the rotation speed N, it is possible to set the polishing degree K according to the customer's request in a wide range from brown rice to white rice based on the rotation speed N. ..

By the way, in the above-described rice polishing apparatus, when the remaining amount of the milled rice 12 temporarily stored in the storage chamber R1 becomes small, the milled rice 12 at the lower part of the storage chamber becomes the rice polished 12 at the upper part of the storage chamber.
The pressure received from the rice is reduced, and the rice polishing pressure rushing into the rice polishing inlet 63 from the storage room R1 to the rice polishing room R2 is decreased. As a result, the rice polishing speed, that is, the delivery amount Q is decreased and the rice polishing rate K is decreased.
There was a problem that was too high.

FIG. 1 shows that the polishing rate K is increased by increasing the rotation speed N even when the amount of the polished rice 12 in the storage chamber R1 becomes small.
FIG. 3 is a schematic configuration diagram of a rice polishing apparatus according to the present invention capable of maintaining a constant value.

This will be described in more detail with reference to FIG.
Reference numeral 1 denotes an operation unit, which includes at least a polishing key 101a for only polishing rice, a fully automatic key 101b for automatically performing polishing and then performing other processing such as rice cooking, and a stop key 101c. With.

Reference numeral 102 denotes a signal discriminating unit, which is a polishing key 10
1a, the fully automatic key 101b, and the stop key 101c are selected, and when the polishing key 101a is selected, a signal notifying that the polishing key 101a has been selected to the drive command means described later (hereinafter, (American selection signal)
When the fully automatic key 101b is selected, a signal notifying that the fully automatic key 101b has been selected (hereinafter referred to as a fully automatic selection signal) is output to the drive command means, and when the stop key 101c is selected. Stop key 10 for drive command means
It outputs a signal notifying that 1c has been selected (hereinafter referred to as a polishing machine stop signal).

Reference numeral 103 is a drive command means, and when a rice-polishing selection signal is inputted, until a rice-polishing machine stop signal is inputted from the rice-cooking rice amount calculating means described later, or a rice-polishing machine stop signal is inputted from the signal discriminating section 102. Until there is, the rice polishing machine M
It outputs a rice-polishing machine operation signal for operating the outer cylinder 60 of the. Further, when the rice commander stop signal is input from the cooked rice amount calculation means after the fully automatic selection signal is input from the signal determination unit 102, the drive command unit 103 outputs the data to the other processing unit 104, that is, the rice cooker. Output a rice end signal to cook rice. Further, when the drive command means 103 receives an input of a polishing machine rotation speed increase command signal from the speed determining means described later while outputting the polishing machine operation signal, the polishing machine rotation speed increase command signal is inputted. The rice milling machine operation signal corresponding to is output.

Reference numeral 105 denotes a cooked rice amount calculating means, which measures the amount of white rice sent from the rice polishing machine M until it reaches a set amount, and when it reaches the set amount, outputs a rice polishing machine stop signal to the drive command means 103. To do.

Numeral 106 is a speed determining means, and when a rice remaining amount decreasing signal is inputted from a rice remaining amount calculating means which will be described later, it instructs the drive command means 103 to increase the rotation number of the rice polishing machine. It outputs a machine speed increase command signal.

Numeral 107 is a rice remaining amount calculating means, which determines that the amount of rice polished 12 in the storage room R1 has decreased to a predetermined amount when the signal indicating that rice has been polished is not input from the moisture content sensor, which will be described later, and the speed determining means 106. In contrast to this, a signal for reducing the amount of remaining rice polishing is output.

Reference numeral 108 denotes a driver, which is drive command means 1
When a rice polishing machine operation signal is input from 03, the electric motor 2 of the rice polishing machine M is driven at the rotation speed corresponding to this signal to rotate the outer cylinder 60.
Is to operate.

Reference numeral 109a is a water content sensor which is a detecting means for detecting the remaining amount of rice polished in the storage chamber. As shown in FIG.
It consists of a pair of electrode plates that are arranged opposite to each other in the vicinity of the inclined surface 42 of the intermediate case 22 in the storage room R1, and whether or not the polished rice 12 exists at that position by being conducted through the polished rice interposed between these electrode plates. If there is any, it outputs a rice polishing signal to the remaining rice amount calculating means 107.

FIG. 2 is a block diagram showing a concrete example of the cooked rice amount calculating means 105. In the figure, 200 is a rice cooker integrated with the rice polishing machine M, 201 is a lid of the rice cooker 200, and the lid 2
Inside 01, with this closed, the outlet 5 of the polishing machine M
The white rice sent from 7 is the inner pot 20 inside the rice cooker 200.
2 is provided with a rice transport path 203 that can be transferred to the rice transfer path 2, and the rice transport path 203 is sealed by a solenoid valve (not shown) during rice cooking. In addition, the rice cooker 200 has
A weight sensor 204 for detecting the weight of water or rice supplied to the inner pot 202 is installed on the bottom portion thereof, and a lid opening / closing detection sensor 205 for detecting the opening / closing of the lid 201 portion is provided. ing.

Reference numeral 206 denotes a lid opening / closing determining means, which determines from the detection result of the lid opening / closing detection sensor 205 whether the lid 201 is open or closed.

Reference numeral 207 is a water / rice amount calculating means, and the value detected by the weight sensor 204 is all water while it is determined that the lid 201 is open by looking at the determination result of the lid opening / closing determining means 206. The weight measurement result of the weight sensor 204 is stored in the memory 208 as the weight of water, and the lid 201
While it is determined that the weight sensor 204 is closed, it is determined that all the values detected by the weight sensor 204 are rice.
The result of the measurement is stored in the memory 208 as the weight of rice. Further, the water / rice amount calculating means 207 is provided in the inner pot 20.
2 has a built-in reset circuit (not shown) that zero-adjusts the fluctuation value of the weight sensor 204 due to the weight of itself or the packing pressure of the lid 201 when calculating the amount of water and rice, which allows the weight of only water or rice to be calculated. Has become.

Reference numeral 209 denotes a rice cooking amount calculating means for calculating the rice weight corresponding to the weight of the water calculated by the water / rice amount calculating means 207.

Reference numeral 210 denotes a rice amount judgment comparing means, which compares the rice weight calculated by the rice cooking amount calculating means 209 with the weight of the white rice supplied from the rice polishing machine M, and the weight of the supplied white rice calculates the rice cooking amount. If the rice weight calculated by the means 209 is reached, a rice polishing machine stop signal is output.

Next, the operation of the rice polishing apparatus having the above structure will be described with reference to FIGS. 1, 2, 10 and 18. In this case, it is assumed that the inner pot 202 of the rice cooker 200 contains a predetermined amount of water and the lid 201 is closed.

First, the user presses the polishing key 1 on the operation unit 101.
01a or fully automatic key 101b is selected and pressed, the signal discrimination unit 102 causes the polishing key 101a or fully automatic key 1
01b is selected, and the polishing key 10
If it is determined that 1a has been selected, a rice selection signal is output to the drive command means 103 to inform that the rice key 101a has been selected. The drive command means 103 is the signal determination unit 10
When the rice polishing selection signal is input from 2, the rice polishing machine operating signal is output to the driver 108 until the rice polishing machine stop signal is input from the rice amount determination / comparison means 210 of the rice cooking rice amount calculation means 105. The driver 108 drives the electric motor 2 based on the rice polishing machine operation signal from the drive command means 103 to rotate the outer cylinder 60 of the rice polishing machine M. As a result, the polishing operation described with reference to FIGS. 10 to 17 is started, and the polished rice 13 is continuously delivered from the delivery port 57. When the white rice 13 is sent out from the outlet 57, the cooked rice amount calculation means 105 integrates and measures the sent white rice 13 until the set amount is reached,
When the set amount is reached, the polishing machine stop signal is sent to the drive command means 10
Output to 3. When the rice polishing machine stop signal is input from the cooked rice amount calculating means 105, the drive command means 103 stops the output of the rice polishing machine operation signal and determines that the rice polishing is completed and sets the rice.

When the drive command means 103 receives a fully automatic selection signal input from the signal discriminating section 102 to inform that the fully automatic key 101b has been selected, the cooked rice amount calculating means 105 conducts polishing rice in the same manner as described above. Until the machine stop signal is input, the rice-polishing machine operation signal is output to the driver 108 to drive the electric motor 2. When the rice-polishing machine stop signal is input, output of the rice-polishing machine operation signal is stopped and other processing is performed. A rice polishing completion signal is output to the unit 104, that is, the rice cooker 200, and control is shifted to the rice cooking process.

Further, the drive command means 103 instructs the driver 108 until the rice discrimination selection signal or the fully automatic selection signal is input from the signal discrimination portion 102 and the rice polishing machine stop signal is input from the cooked rice amount calculation means 105. When a rice polishing machine rotation speed increase command signal is input from the speed determination means 106 while the rice polishing machine operation signal is being output, the rice polishing machine operation signal corresponding to this command signal is output to the driver 108. The rotation number N of the rice polishing machine M is increased to increase the delivery amount Q and the rice polishing degree K is kept constant.

Example 2. In the above embodiment, the rice polishing apparatus that increases or decreases the rotation speed of the rice polishing machine based on the result of the remaining rice amount detecting means is shown, but the degree of rice polishing also changes depending on the ambient temperature. When the ambient temperature is high, the initial temperature of the grinding inner cylinder is also high. Further, heat generated during grinding is further applied, the temperature of the inner cylinder further rises, the temperature of the rice in contact with the inner cylinder rises, and the surface of the rice softens, so that the degree of polishing increases significantly. On the contrary, when the ambient temperature was low, the surface of rice was hardened and the degree of polishing decreased, and as a result, white rice with a constant degree of polishing could not be obtained.

FIG. 3 shows the present invention in which the polishing rate K can be kept constant by increasing the rotation speed N when the ambient temperature is high and decreasing the rotation speed N when the ambient temperature is low. It is a figure which shows the schematic block diagram of the rice polishing apparatus concerned.

This will be described in detail with reference to FIG.
About 105 to 108, it is the same as that of the above-mentioned Example 1. Reference numeral 106 denotes a speed determining means, and when a high temperature signal is input from a temperature comparing means 301, which will be described later, the drive instructing means 103 is instructed to increase the rotation number of the polishing machine, and a low signal is input. And drive command means 10
It outputs a command signal to increase / decrease the number of revolutions of the rice polishing machine for instructing No. 3 to decrease the number of rotations of the rice polishing machine.

Reference numeral 301 denotes a temperature comparison means, which compares a value within a preset standard temperature range with a value higher or lower than the range when a temperature detection signal is input from the ambient temperature sensor 302. However, the standard, high, and low signals are output to the speed determining means 106.

Example 3. It should be noted that, in the above-mentioned embodiment, the drive control device for increasing / decreasing the rotation speed of the rice polishing machine is shown based on the result of the ambient temperature comparing means, but the rice polishing degree also varies depending on the rice water content. When the moisture content of rice is high, the rice content is high and the surface of the rice is soft, so the degree of polishing is increased. On the other hand, when the water content of rice is low, the amount of water contained in the rice is small and the surface of the rice is hard, so that the degree of polishing is reduced.

FIG. 4 is a schematic block diagram of a rice polishing apparatus capable of coping with the variation of the rice polishing degree depending on the water content. This will be described in detail with reference to FIG. 4. Reference numeral 109b is a water content sensor which is a detecting means for detecting the water content of the rice polished in the storage chamber. A pair of water content sensors arranged in the storage chamber R1 near the inclined surface 42 of the intermediate case 22 face each other. The electrode capacity is detected by conducting the milled rice interposed between the electrode plates to conduct electricity. When an alternating current voltage is applied between the electrode plates and the flowing current is measured, water has an extremely low conductivity (pure water is theoretically 0.055 μmho / cm at 20 ° C.). The water content of can be detected.

Reference numeral 311 denotes a water content comparing means, which compares the water content measurement result of the water content sensor 109b with a standard water content having a preset predetermined range, and the water content measurement result is the standard water content range. The value within, the value higher or lower than the standard moisture content range,
A standard, high, or low signal is output to the speed determining means 106.

Reference numeral 106 denotes a speed determining means, which gives an instruction to increase the rotational speed of the rice polishing machine when the signal input from the water content comparing means 311 is high, and to decrease the rotational speed when the signal input is low. It outputs a command signal to increase / decrease the number of rotations of the polishing machine.

Reference numeral 130 is a drive commanding means, and when the speed determining means 106 receives a command to increase / decrease the number of revolutions of the polishing machine,
The driver 10 outputs the operation signal of the polishing machine corresponding to this command signal.
Output to 8 to increase or decrease the rotation number N of the polishing machine M to keep the polishing degree constant.

Example 4. FIG. 5 shows a means for redetermining the rotation number of the rice polishing machine from the ambient temperature and the water content. This will be described in detail with reference to FIG. 5. Reference numeral 321 is speed re-determining means, which is based on the temperature comparing means 301 and the water content comparing means 31.
When the speed based on 1 is used, the speed is determined again and a rice polishing machine rotation speed increase / decrease command signal is output. When the drive command means 103 receives the rice polishing machine rotation speed increase / decrease command signal from the speed redetermination means 321, this command signal is output. The rice polishing machine operation signal corresponding to is output to the driver 108 to increase or decrease the rotation speed N of the rice polishing machine M to keep the polishing degree constant.

Example 5. FIG. 6 shows a schematic configuration diagram of a rice polishing apparatus capable of coping with load fluctuations of the rice polishing machine. This will be described in detail with reference to FIGS. 6 to 8. 332 is a rice polishing machine M.
Is a rotation sensor for detecting the number of rotations of the electric motor 2. 333 is a rotary plate in which one of the output shafts 334 of the electric motor 2 is provided with a plurality of light passage holes 335, and 336 is a rotary plate 333 with a predetermined interval. The photo sensor is arranged so as to sandwich both sides, and detects the number of times the perforation 335 of the rotating rotary plate 333 passes through the photo sensor within a predetermined time.

Reference numeral 331 is a load comparing means, which compares the rotation speed measurement result of the rotation speed sensor 332 with a standard rotation speed having a preset constant range, and the rotation speed measurement result is within this standard rotation speed range. Is output to the speed determining means 106, and a standard, high, or low signal is output to the speed determining means 106.

Reference numeral 106 designates a speed determining means, which gives an instruction to decrease the rotational speed of the rice polishing machine when the signal input from the load comparing means 331 is high, and to increase the rotational speed when the signal is low. It outputs a command signal to increase / decrease the number of revolutions of the polishing machine.

Reference numeral 103 is a drive commanding means, and when a speed increasing / decreasing means 106 inputs a command to increase / decrease the number of revolutions of the polishing machine,
The driver 10 outputs the operation signal of the polishing machine corresponding to this command signal.
Output to 8 to increase or decrease the rotation number N of the polishing machine M to keep the polishing degree constant.

Example 6. FIG. 9 is a means for redetermining the rotation speed from the ambient temperature, the water content and the load. When this is described in detail with reference to FIG. 9, 321 is a speed redetermining means,
Speed based on temperature comparing means 301 and water content comparing means 3
11 and the speed based on the load comparison means 331 to determine the speed again, and output a polishing machine rotation speed increase / decrease command signal, and the drive command means 103 is the speed redetermination means 321 to increase the polishing machine rotation speed increase / decrease command. When a signal is input, a rice-polishing machine operation signal corresponding to this command signal is output to the driver 108 to increase or decrease the number of revolutions N of the rice-polishing machine M to keep the rice-polishing degree constant.

Similarly, the number of revolutions may be determined by a combination of the remaining rice amount detecting means, the ambient temperature detecting means, the water content detecting means, and the load (rotating speed) detecting means.
It goes without saying that the degree of polishing is kept constant.

[0068]

As described above, according to the present invention, the number of revolutions of the rice polishing machine is controlled by the remaining amount of rice in the storage chamber so that the degree of polishing can be kept constant even when the remaining amount of rice changes. Can be held. In addition, the rotation speed of the polishing machine is controlled according to the ambient temperature, the moisture content of rice, the load during grinding and polishing, the ambient temperature,
The degree of rice polishing can be kept constant without being affected by changes in the moisture content and load of rice.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a specific example of a rice cooked rice amount calculation unit.

FIG. 3 is a schematic configuration diagram of a second embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a third embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a fifth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a rotation speed sensor.

FIG. 8 is a schematic configuration diagram of a rotating plate.

FIG. 9 is a schematic configuration diagram of a sixth embodiment of the present invention.

FIG. 10 is a structural explanatory view of a rice polishing apparatus according to an embodiment of the present invention.

11 is a cross-sectional view taken along the line AA of FIG.

FIG. 12 is a vertical sectional view of the vicinity of a rice polishing room.

FIG. 13 is an enlarged view of a slit for embryo removal.

FIG. 14 is a top view of an inner cylinder.

FIG. 15 is an explanatory diagram of a rice polishing operation.

FIG. 16 is an explanatory diagram of a rice grain transportation state.

FIG. 17 is an explanatory diagram of a polishing operation of a slit.

FIG. 18 is a characteristic diagram of polishing degree and delivery amount.

[Explanation of symbols]

 2 Electric motor 12 Polished rice 13 White rice 57 Outlet 60 Outer cylinder 63 Intake 70 Inner cylinder 71 Slit 72 Germ removal claw 101 Operation part 103 Drive command means 105 Cooked rice amount calculation means 106 Speed determination means 107 Rice remaining amount calculation means 109 Water content Sensor (detection means) 301 Temperature comparison means 302 Ambient temperature sensor (detection means) 311 Water content comparison means 321 Speed redetermination means 331 Load comparison means 332 Rotation sensor (detection means) M Rice polishing machine R1 Storage room R2 Rice polishing room

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Hiroaki Tsukahara Inventor Hiroaki Tsukahara 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (5)

[Claims] 1. A rice polishing machine for arranging an inner cylinder and an outer cylinder rotatably relative to each other in a rice storage chamber for grinding and polishing rice, and an electric motor for driving the inner cylinder and the outer cylinder of the rice polishing machine. A rice polishing apparatus comprising: a speed determining unit that determines a speed of the electric motor; and a drive control unit that controls the electric motor by the speed determining unit. 2. An inner cylinder and an outer cylinder are rotatably arranged in a rice storage chamber, and a grinding and polishing means for grinding and polishing rice by changing the distance between the inner cylinder and the outer cylinder is provided. The rice polishing machine, the electric motor for driving the inner and outer cylinders of the rice polishing machine, the remaining rice amount detecting means for detecting the remaining amount of rice in the storage chamber, and the detection result of the remaining rice amount detecting means A rice polishing apparatus comprising: speed determining means for determining a speed of an electric motor; and drive control means for controlling the electric motor by the speed determining means. 3. An inner cylinder and an outer cylinder are rotatably arranged in a rice storage chamber, and a grinding and polishing means for grinding and polishing rice is provided by changing a distance between the inner cylinder and the outer cylinder. A rice polishing machine, an electric motor for driving the inner and outer cylinders of the rice polishing machine, temperature detecting means for detecting the ambient temperature of the outside, and ambient temperature based on the detection result of the temperature detecting means and a preset value. The temperature comparing means for comparing, the speed determining means for determining the number of revolutions of the polishing machine by the temperature comparing means, and the drive control means for controlling the electric motor by the speed determining means are provided. Rice equipment. 4. An inner cylinder and an outer cylinder are arranged so as to be rotatable relative to each other in a rice storage chamber, and a grinding and polishing means for grinding and polishing rice by changing a distance between the inner cylinder and the outer cylinder is provided. A rice polishing machine, an electric motor for driving the inner and outer cylinders of the rice polishing machine, and a water content detecting means for detecting the water content of rice in the storage chamber,
Moisture content comparing means for comparing the moisture content according to the detection result of the moisture content detecting means with a preset value, speed determining means for determining the number of revolutions of the rice polishing machine by the moisture content comparing means, and the speed determining means. And a drive control means for controlling the electric motor by means. 5. A grinding and polishing means for arranging an inner cylinder and an outer cylinder rotatably relative to each other in a rice storage chamber and grinding and polishing rice by changing the distance between the inner cylinder and the outer cylinder. Rice machine,
An electric motor for driving the inner cylinder and the outer cylinder of the polishing machine, a rotation speed detecting means for detecting the rotation speed of the electric motor or the rotation speed of the inner cylinder or the outer cylinder, and rotation based on the detection result of the rotation speed detecting means. Load comparing means for comparing the number with a preset value, speed determining means for determining the number of revolutions of the polishing machine by the load comparing means, and drive control means for controlling the electric motor by the speed determining means. A rice polishing device characterized by being equipped.