JP2023107004A - Rice milling device - Google Patents

Abstract

To provide a rice milling machine that is able to perform high-accuracy yield control in real time.SOLUTION: A rice milling machine including polishing degree adjustment means that adjusts a polishing degree of rice grains and a control unit that controls the polishing degree adjustment means, comprises: a raw material whiteness sensor that detects whiteness of raw material rice grains before polishing the raw material rice grains; and a product whiteness sensor that detects whiteness of product rice grains after polishing the raw material rice grains; wherein the control unit controls the polishing degree adjustment means so that a whiteness increase value of the product rice grain obtained from the whiteness of the raw material rice grain detected by the raw material whiteness sensor and the whiteness of the product rice grain detected by the product whiteness sensor coincides with a target value of the whiteness increase of the product rice grain set in correspondence with a target value of a yield.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a rice polishing machine capable of highly accurate yield control in real time.

Conventionally, it is known that when brown rice is polished by a rice milling machine, yield control is performed based on the change in the weight of rice grains before and after polishing (see, for example, Patent Document 1).

In the invention described in Patent Document 1, weighing devices are provided before and after the rice milling machine, the yield value is calculated based on the change in the weight value of the rice grains weighed by each weighing device, and the yield value is used as the reference value. It is to adjust the resistance force of the resistance lid of the rice milling machine compared with the above, and the yield control of the rice milling machine can be performed in real time.

By the way, in the invention described in Patent Document 1, it is necessary to instantaneously measure the weight value of rice grains in each weighing device provided before and after the rice mill, but weighing in a short time is easily affected by vibration and the like. Due to the large error, it is difficult to measure an accurate weight value.

JP-A-6-34425

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rice milling machine capable of highly accurate yield control in real time.

As a result of intensive studies, the inventor of the present invention has arrived at the present invention by paying attention to the fact that the whiteness of rice grains increases as the polishing progresses.

That is, in order to achieve the above object, the present invention is
a stamping accuracy adjusting means for adjusting the stamping accuracy of rice grains;
A rice milling machine comprising a control unit that controls the stamping accuracy adjusting means,
Equipped with a raw material whiteness sensor that detects the whiteness of raw rice grains before polishing and a product whiteness sensor that detects the whiteness of product rice grains after polishing,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor is the yield target. It is characterized by controlling the stamping accuracy adjusting means so as to coincide with a target value for increasing the whiteness of product rice grains set corresponding to the value.

In the present invention, the “whiteness of rice grains” refers to, for example, the whiteness of rice grains measured by a whiteness meter “MM1D” manufactured by Satake Co., Ltd., and the whiteness meter “C-600” manufactured by Kett Science Laboratory Co., Ltd. is defined as a general index that expresses the degree of whiteness of the color of rice grains, such as the whiteness of rice grains measured by

In the present invention, the term "whiteness sensor" is defined as general sensors that measure the "whiteness of rice grains" by, for example, illuminating rice grains and receiving the reflected light.

In the present invention, the “whiteness increase value (whiteness increase)” refers to the whiteness of rice grains before polishing (raw rice grains) and the whiteness of rice grains after the start of polishing (product rice grains after polishing and intermediate rice grains during polishing). It is an index that expresses the change in whiteness of the color of the rice grains before polishing and after the start of polishing, and is the difference between the raw rice grains (brown rice) and the product rice grains (polished rice including polished rice and separated rice). The difference in whiteness is called the "whiteness increase value of the product rice grain", and the difference in whiteness between the raw rice grains and the intermediate rice grains is called the "whiteness increase value of the intermediate rice grains", and the value increases as the polishing progresses. .

The present invention
A polishing unit having a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, a polishing section having a polishing chamber formed between the porous cylinder and the polishing roll, and one end side of the polishing chamber A single rice milling machine in which a rice grain supply unit is provided at the end and a rice grain discharge unit is provided at the other end, and the rice grains are polished in the polishing chamber,
The raw material whiteness sensor is provided in the rice grain supply unit, and the product whiteness sensor is provided in the rice grain discharge unit,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for product is the yield. It is preferable to control the stamping precision adjusting means so as to coincide with the target value for increasing the whiteness of the product rice grains set corresponding to the target value of .

The present invention
It has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing parts in which a polishing chamber is formed between the porous cylinder and the polishing roll, and one end side of each polishing chamber is provided. A continuous seat type rice milling machine having a rice grain feeding section and a rice grain discharging section on the other end side, moving the rice grains from the first stage polishing section to the final stage polishing section, and sequentially polishing the rice grains in each of the polishing chambers,
The raw material whiteness sensor is provided in the rice grain supply section provided on one end side of the polishing chamber in the first stage polishing section, and the rice grain discharge section provided on the other end side of the polishing chamber in the final stage polishing section is used for the product. Each whiteness sensor is provided,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for product is the yield. It is preferable to control each stamping precision adjusting means in each stage so as to coincide with the target value for increasing the whiteness of the product rice grains set corresponding to the target value of .

The present invention
It has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing parts in which a polishing chamber is formed between the porous cylinder and the polishing roll, and one end side of each polishing chamber is provided. A continuous seat type rice milling machine having a rice grain feeding section and a rice grain discharging section on the other end side, moving the rice grains from the first stage polishing section to the final stage polishing section, and sequentially polishing the rice grains in each of the polishing chambers,
The raw material whiteness sensor is provided in the rice grain supply section provided on one end side of the polishing chamber in the first stage polishing section, and the rice grain discharge section provided on the other end side of the polishing chamber in the final stage polishing section is used for the product. A whiteness sensor for an intermediate product for detecting the whiteness of intermediate product rice grains during polishing is provided at the rice grain discharge section provided at the other end of each polishing chamber in each stage of the polishing section other than the final stage. provided,
The control unit controls that the whiteness increase value of the intermediate rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the intermediate rice grains detected by the whiteness sensor for intermediate products is the above The whiteness of the raw rice grains and the product whiteness detected by the whiteness sensor for the raw material coincide with the target value for the whiteness rise of the intermediate product rice grains set within the target value for the whiteness rise of the product rice grains. so that the whiteness increase value of the product rice grains obtained from the whiteness of the product rice grains detected by the sensor matches the target value of the whiteness increase of the product rice grains set corresponding to the target yield value, It is preferable to control each stamping accuracy adjustment means in each stage.

In the present invention, the target value for increasing the whiteness of the intermediate product rice grains is set within the range of the target value for increasing the whiteness of the product rice grains according to the polishing method of the polishing sections of each stage, the number of polishing sections, etc. is preferred.

The present invention
a setting unit capable of inputting and setting the target value of the yield;
a registration unit capable of storing and registering a correspondence relationship between the yield value and the whiteness increase value in advance in a table;
The control unit refers to the table of the registration unit based on the target value of yield input and set by the setting unit, reads out the corresponding whiteness increase value from the table, and increases the whiteness of the product rice grains. is set, and the whiteness increase value of the product rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for products is the above It is preferable to control the polishing precision adjusting means so as to match the target value of whiteness increase of product rice grains.

The present invention
a setting unit for selecting the type of raw rice grains and inputting and setting the target value of the yield;
a registration unit capable of storing and registering in advance in a table the correspondence relationship between the yield value and the whiteness increase value for each type of raw rice grain,
The control unit refers to the table of the registration unit based on the target yield value set by selecting the type of raw rice grains in the setting unit, and selects the corresponding whiteness increase value from the table. Read out and set a target value for increasing the whiteness of the product rice grains, and the product obtained from the whiteness of the raw rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor. It is preferable to control the stamping accuracy adjusting means so that the whiteness increase value of the rice grains matches the target value of the whiteness increase of the product rice grains.

The present invention
The control unit determines a whiteness increase value of the product rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for product rice. It is preferable to control the polishing accuracy adjusting means such that the whiteness increase value of the product rice grains is compared with the target whiteness increase value and matches the whiteness increase value of the product rice grains.

The present invention
The control unit sets a target value for the whiteness of the product rice grains based on the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the target value for the whiteness increase of the product rice grains, and sets the whiteness target value for the product rice grains. The whiteness of the product rice grains detected by the rice sensor is compared with the target value of the whiteness of the product rice grains, and the polishing precision adjustment is performed so that the whiteness of the product rice grains matches the target value of whiteness of the product rice grains. It is preferred to control means.
Thereby, in the present invention, the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor is The polishing precision adjusting means can be controlled so as to coincide with the target value for increasing the whiteness of product rice grains set corresponding to the target value for the fraction.

The present invention
The rice grain supply unit provided with the raw material whiteness sensor has a rotary valve, a supply-side transparent window is formed on a flow channel wall surface of the rotary valve, and the raw material whiteness sensor passes through the supply-side transparent window. It is preferable to detect the whiteness of the raw material rice grains.

The present invention
The rice grain discharge part provided with the product whiteness sensor has a rice grain discharge cylinder, and a discharge side transparent window is formed on a peripheral wall surface of the rice grain discharge cylinder, and the product whiteness sensor extends through the discharge side transparent window. It is preferable to detect the whiteness of the product rice grains through.

The present invention
The rice grain discharge part provided with the intermediate product whiteness sensor has a rice grain discharge cylinder, a discharge side transparent window is formed on a peripheral wall surface of the rice grain discharge cylinder, and the intermediate product whiteness sensor is the discharge side transparent window. It is preferable to detect the whiteness of the intermediate rice grains through the window.

The present invention
The means for adjusting the polishing accuracy includes at least one of a pressure lid provided at the discharge port of the rice grain discharge section, the polishing roll provided in the polishing section, and a shutter provided in the rice grain supply section. It is preferable to control at least one of the degree of pressing of the lid, the number of rotations of the whitening roll, and the degree of opening of the shutter.

The rice milling machine of the present invention comprises a raw material whiteness sensor for detecting the whiteness of the raw rice grains before polishing and a product whiteness sensor for detecting the whiteness of the product rice grains after polishing, and the control unit comprises: The whiteness increase value of the product rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for products is set corresponding to the target value of yield. Since the polishing accuracy adjusting means is controlled so as to match the target value for increasing the whiteness of the product rice grains to be polished, the whiteness of the rice grains before and after polishing can be instantaneously and accurately measured by each whiteness sensor. It is possible to perform high-precision yield control in real time based on the change in whiteness of the color of rice grains (increase in whiteness) before and after polishing.

The rice milling machine of the present invention has a perforated cylinder and a polishing roll rotatably disposed in the perforated cylinder, and is provided with one polishing section in which a polishing chamber is formed between the perforated cylinder and the polishing roll. a single-unit type rice milling machine in which a rice grain supply section is provided on one end side of the polishing chamber and a rice grain discharge section is provided on the other end side of the polishing chamber, and the rice grains are polished in the polishing chamber; The product whiteness sensor is provided in each of the rice grain discharge units, and the control unit controls the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor. and controlling the stamping accuracy adjusting means so that the whiteness increase value of the product rice grains obtained from the above-mentioned method matches the target value of the whiteness increase of the product rice grains set corresponding to the target yield value. If so, the whiteness of the rice grains before and after polishing can be measured instantaneously and accurately by each whiteness sensor. Highly accurate yield control can be performed.

The rice milling machine of the present invention has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing units in which a polishing chamber is formed between the porous cylinder and the polishing roll, A rice grain supply unit is provided on one end side of each polishing chamber, and a rice grain discharge unit is provided on the other end side. In the mill, the raw material whiteness sensor is provided in the rice grain supply section provided at one end of the polishing chamber in the first polishing section, and the rice grain discharge section provided at the other end of the polishing chamber in the final polishing section is The product whiteness sensors are provided respectively, and the controller controls the product obtained from the whiteness of the raw rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor. Each stamping accuracy adjusting means in each stage is controlled so that the increase in whiteness of rice grains matches the target value for increase in whiteness of product rice grains set corresponding to the target yield. For example, the whiteness of the rice grains before polishing in the first stage and the whiteness of the rice grains after polishing in the final stage can be instantaneously and accurately measured by each whiteness sensor. Based on (increase in whiteness), high-precision yield control can be performed in real time.

The rice milling machine of the present invention has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing units in which a polishing chamber is formed between the porous cylinder and the polishing roll, A rice grain supply unit is provided on one end side of each polishing chamber, and a rice grain discharge unit is provided on the other end side. In the mill, the raw material whiteness sensor is provided in the rice grain supply section provided at one end of the polishing chamber in the first polishing section, and the rice grain discharge section provided at the other end of the polishing chamber in the final polishing section is The product whiteness sensor, and the intermediate product whiteness sensor for detecting the whiteness of the intermediate product rice grains during polishing in the rice grain discharge unit provided on the other end side of each polishing chamber in each stage of the polishing unit other than the final stage. Sensors are respectively provided, and the control unit determines the whiteness of the intermediate rice grains from the whiteness of the raw rice grains detected by the raw whiteness sensor and the whiteness of the intermediate rice grains detected by the intermediate whiteness sensor. The whiteness increase value matches the target value for the whiteness increase of the intermediate product rice grains set within the range of the target value for the whiteness increase of the product rice grains, and the whiteness of the raw material rice grains detected by the raw material whiteness sensor. and a whiteness increase target of the product rice grains, wherein the whiteness increase value of the product rice grains obtained from the whiteness of the product rice grains detected by the product whiteness sensor is set corresponding to the target value of the yield. The whiteness of the rice grains before polishing in the first stage and the whiteness of the rice grains after polishing in the final stage are measured by the whiteness sensor for the raw material and the whiteness sensor for the product. Since the whiteness sensor can instantaneously and accurately measure the whiteness of each grain, it is possible to perform high-precision yield control in real time based on the change in the whiteness of the color of rice grains (increase in whiteness) before and after polishing.
Further, in the rice milling machine of the present invention, the target value for increasing the whiteness of rice grains is set in stages, and the whiteness of rice grains before polishing, the whiteness of rice grains during polishing, and the whiteness of rice grains after polishing are set. Since the whiteness can be measured instantaneously and accurately by each whiteness sensor, it is possible to measure the whiteness of rice grains before polishing and after the start of polishing. Yield control can be performed.

The rice milling machine of the present invention comprises a setting unit that enables input setting of the target yield value, and a registration unit that stores and registers the correspondence relationship between the yield value and the whiteness increase value in advance in a table. The control unit refers to the table of the registration unit based on the target value of the yield input and set by the setting unit, reads out the corresponding whiteness increase value from the table, and determines the whiteness of the product rice grains. A target value for the increase is set, and the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor is If the means for adjusting the polishing accuracy is controlled so as to match the target value of whiteness increase of the product rice grains, the simple operation of inputting and setting the target value of the yield by the operator enables high precision in real time. yield control can be performed.

The rice milling machine of the present invention comprises a setting unit that selects the type of raw rice grains and allows input setting of the target yield value, and a correspondence relationship between the yield value and the whiteness increase value for each type of raw rice grains. a registration unit that can be stored and registered in advance in a table, wherein the control unit selects the type of raw rice grains in the setting unit and inputs and sets the yield target value of the registration unit based on the target value. The table is referred to, the corresponding whiteness increase value is read from the table, the target value for the whiteness increase of the product rice grains is set, and the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the product whiteness are detected. If the polishing accuracy adjusting means is controlled so that the whiteness increase value of the product rice grains obtained from the whiteness of the product rice grains detected by the rice sensor matches the target value of the whiteness increase of the product rice grains. A real-time, high-precision yield control can be achieved by a simple operation in which the operator simply selects the type of raw rice grains and inputs and sets the yield target value.

In the rice milling machine of the present invention, the rice grain supply unit provided with the raw material whiteness sensor has a rotary valve, a supply side transparent window is formed on a flow path wall surface of the rotary valve, and the raw material whiteness sensor is If the whiteness of the raw rice grains is detected through the transparent window on the supply side, the friction of the raw rice grains that are stably supplied at a high speed while the flow path wall of the rotary valve and the blades of the rotor are in a dense state. As a result, it is possible to prevent bran from adhering to the inner surface of the supply-side transparent window, so that the raw material whiteness sensor can accurately detect the whiteness of the raw material rice grains.

In the rice milling machine of the present invention, the rice grain discharge part provided with the product whiteness sensor has a rice grain discharge cylinder, a discharge side transparent window is formed on a peripheral wall surface of the rice grain discharge cylinder, and the product whiteness sensor is provided. detects the whiteness of the product rice grains through the discharge side transparent window, the friction action of the product rice grains rotating at high speed can prevent the bran from adhering to the inner surface of the discharge side transparent window. , the product whiteness sensor can accurately detect the whiteness of product rice grains.

In the rice milling machine of the present invention, the rice grain discharge part provided with the intermediate product whiteness sensor has a rice grain discharge cylinder, a discharge side transparent window is formed on a peripheral wall surface of the rice grain discharge cylinder, and the intermediate product whiteness sensor is provided. If the sensor detects the whiteness of the intermediate rice grains through the transparent window on the discharge side, the frictional action of the grains of intermediate rice grains rotating at high speed will prevent the bran from adhering to the inner surface of the transparent window on the discharge side. Therefore, it is possible to accurately detect the whiteness of the intermediate product rice grains by the intermediate product whiteness sensor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of main parts of a rice milling machine according to an embodiment of the present invention; Control block diagram of the rice milling machine. Explanatory drawing of the setting part of a rice mill. FIG. 3 is a cross-sectional view of a main part of a rice milling machine according to another embodiment of the present invention;

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a cross-sectional view of a main portion of a rice milling machine according to an embodiment of the present invention.
The rice milling machine 1 according to the embodiment of the present invention is a single horizontal rice milling machine and includes one polishing section 3 .
The polishing unit 3 includes a cylindrical or polygonal cylindrical polishing cylinder made of a porous wall such as a wire mesh, here a rice polishing screen 31 provided with slits over the entire screen, and a rotatably disposed rice polishing screen 31. A polishing chamber 33 is formed between the rice polishing screen 31 and the polishing roll 32 for polishing the rice grains.
The polishing unit 3 can adjust the amount of stirring of the rice grains in the polishing chamber 33 by the rotation speed of the polishing roll 32 .

A rice grain supply unit 2 is provided at one end of the polishing chamber 33, and a rice grain discharge unit 4 is provided at the other end.
The rice grain supply unit 2 has a cylindrical grain feeding tube 21 and a screw roll 22 rotatably arranged in the grain feeding tube 21 coaxially with the whitening roll 32. A feeding chamber 23 is formed between the tube 21 and the screw roll 22 to transfer raw rice grains (brown rice) before polishing to the polishing chamber 33 .

A raw material supply port 24 is formed in the upper portion of one end of the grain feeding tube 21, and a raw material supply tube 25 is disposed in the raw material supply port 24, while the other end is open. The screw roll 22 and the whitening roll 32 are mounted on a main shaft 26 that is driven to rotate by a drive motor (not shown).

The rice grain supply unit 2 has a raw material supply trough 27 connected to the raw material supply pipe 25 and a rotary valve 28 provided above the raw material supply trough 27 . Further, the raw material supply gutter 27 is provided with a shutter (not shown).
The rice grain supply unit 2 adjusts the amount of raw rice grains supplied onto the shutter by the rotation speed of the rotary valve 28, and adjusts the amount of raw rice grains supplied into the grain feeding tube 21 by the opening of the shutter. The amount of supply can be adjusted.

A transparent window (not shown) made of glass, resin, or the like is formed on the wall surface of the case of the rotary valve 28 . A raw material whiteness sensor 51 for detecting the whiteness of raw material rice grains is provided on the outer surface of the case of the rotary valve 28. The raw material whiteness sensor 51 detects the whiteness of the raw material rice grains through the transparent window. To detect.

In the rotary valve 28, the sticking of rice bran to the inner surface of the transparent window can be prevented by the friction action of the raw material rice grains which are stably supplied at a high speed in a dense state between the inner surface of the case and the blades of the rotor. The whiteness sensor 51 can accurately detect the whiteness of the raw rice grains.

The rice grain discharge unit 4 includes a cylindrical or polygonal cylindrical rice grain discharge cylinder 41 which is provided at the other end of the polishing chamber 33 and into which the polished rice grains (polished rice) are transferred, and the rice grain discharge cylinder 41. It has a rice grain discharge trough 43 provided so as to communicate with the formed rice grain discharge port 42 . A pressure lid 44 is provided in the rice grain discharge gutter 43 so as to block the rice grain discharge port 42 .
The rice grain discharge unit 4 can adjust the discharge amount of product rice grains according to the degree of pressure of the pressure lid 44 .

A transparent window (not shown) made of glass, resin, or the like is formed on the peripheral wall surface of the rice grain discharge cylinder 41 . A product whiteness sensor 52 for detecting the whiteness of the product rice grains is provided on the outer surface of the rice grain discharge tube 41, and the product whiteness sensor 52 detects the whiteness of the product rice grains through the transparent window. do.

In the rice grain discharge cylinder 41, the adhesion of rice bran to the inner surface of the transparent window can be prevented by the friction action of the product rice grains rotating at high speed, and the whiteness of the product rice grains can be accurately detected by the product whiteness sensor 52. can be detected.

Note that the product whiteness sensor 52 can also be provided in an arbitrary portion below the rice grain discharge port 42, such as the outer surface of the rice grain discharge trough 43, where the whiteness of the product rice grains can be detected.

In the polishing section 3, the whitening roll 32 is formed with a plurality of blast holes (not shown), and air supplied from a blower fan (not shown) through a hollow portion (not shown) in the main shaft 26 is the blast. It blows air from the hole.
A dust collection chamber 34 is provided around the polishing chamber 33 and between the rice polishing screen 31 and the main body of the rice mill, and the dust collection chamber 34 communicates with a dust collection duct 35 provided below.

In the rice milling machine 1 according to the embodiment of the present invention, raw rice grains supplied from the rotary valve 28 onto the shutter of the raw material supply trough 27 are sent to the raw material supply port 24 through the raw material supply tube 25. , is supplied into the grain feeding chamber 23 from the raw material supply port 24 .
Then, the raw rice grains supplied to the feeding chamber 23 are transferred to the polishing chamber 33 side by the screw roll 22 .
At that time, the raw material whiteness sensor 51 provided on the outer surface of the case of the rotary valve 28 detects the whiteness of the raw material rice grains.

The raw rice grains transferred to the polishing chamber 33 are agitated by the polishing roll 32 and polished by friction between the rice grains while moving toward the rice grain discharge tube 41. After being polished in the polishing chamber 33, The product rice grains are discharged from the rice grain discharge trough 43 by pushing open the pressure lid 44 provided to close the rice grain discharge port 42 .
At that time, the whiteness of the product rice grains is detected by the product whiteness sensor 52 provided on the outer surface of the rice grain discharge tube 41 .

In the polishing chamber 33, rice bran is generated by polishing the raw rice grains. 34 to a dust collecting duct 35.

FIG. 2 shows a control block diagram of the rice milling machine. FIG. 3 shows an explanatory diagram of an example of the setting section of the rice mill.
The rice milling machine 1 according to the embodiment of the present invention, based on the whiteness increase value (increase in whiteness) of the product rice grains obtained from the whiteness of the raw rice grains before polishing and the whiteness of the product rice grains after polishing, the rice grain discharge section Feedback control of the pressure lid 44 provided at the rice grain discharge port 42 of 4, the polishing roll 32 provided at the polishing unit 3, and the polishing accuracy adjusting means 7 such as the shutter provided at the raw material supply trough 27 A control unit 6 is provided.

The control unit 6 includes a setting unit 61 capable of setting a target yield value for each type of raw rice grain in the polishing process, and a correspondence relationship between the yield value and the whiteness increase value for each type of raw rice grain. A registration unit 62 for storing and registering in advance is provided.

The setting unit 61 is, for example, an operation panel provided on a control panel, and the setting screen shown in FIG. A setting button 612 is provided for
The setting screen of the setting unit 61 is provided with a target yield value display unit 613 for displaying a target value of yield. The target value of the yield can be set while confirming the numerical value displayed in the section 613 .

The registration unit 62 is, for example, a storage device provided in a control panel. can be stored and registered in advance in a table.
The raw material information of the raw rice grains can include the place of production, variety, year of production, grade, producer, and the like, and in the case of mixed rice, the usage ratio and the like.

The control unit 6 refers to the table of the registration unit 62 based on the yield target value set by the operator by selecting the type of raw rice grains in the setting unit 61, and selects the corresponding whiteness value from the table. The increase value is read out and the target value for increasing the whiteness of product rice grains is set.

Then, the control unit 6 determines the whiteness increase value of the product rice grains based on the whiteness of the raw rice grains detected by the raw whiteness sensor 51 and the whiteness of the product rice grains detected by the product whiteness sensor 52. is obtained, and the whiteness increase value of the product rice grains is compared with the target whiteness increase value of the product rice grains, and the whiteness increase value of the product rice grains is matched with the target whiteness increase value of the product rice grains, The pressing degree of the pressure lid 44, the rotation speed of the polishing roll 32, the opening degree of the shutter, etc. in the stamping accuracy adjusting means 7 are controlled.

Here, the control unit 6 sets a target value for the whiteness of the product rice grains after polishing based on the whiteness of the raw material rice grains detected by the raw material whiteness sensor 51 and the target value for increasing the whiteness of the product rice grains. is set, and the whiteness of the product rice grains detected by the product whiteness sensor 52 is compared with the target value of whiteness so that the whiteness of the product rice grains matches the target value of whiteness. It is also possible to control the stamping accuracy adjusting means.

The setting unit 61 is provided with a product yield value display unit 614 that displays the yield value of the product rice grains. By referring to the table of the registration unit 62 , the corresponding yield value can be read out from the table and displayed on the product yield value display unit 614 .

The rice milling machine 1 according to the embodiment of the present invention is provided with one polishing section 3, the rice grain supply section 2 is provided on one end side of the polishing chamber 33, and the rice grain discharge section 4 is provided on the other end side thereof. The rice grain feeding unit 2 is provided with the raw material whiteness sensor 51, and the rice grain discharging unit 4 is provided with the whiteness sensor 52 for the product. , the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the whiteness sensor 51 for raw materials and the whiteness of the product rice grains detected by the whiteness sensor 52 for the product is set by the operator. Since the polishing accuracy adjusting means 7 is controlled so as to coincide with the target value for increasing the whiteness of the product rice grains set corresponding to the target value of the fraction, the whiteness sensors 51 and 52 detect the whiteness of the raw rice grains and the product rice grains. The whiteness of each rice grain can be measured accurately in an instant, and high-precision yield control can be performed in real time based on the change in the whiteness of the color of rice grains (increase in whiteness) before and after polishing.

FIG. 4 shows a cross-sectional view of a main part of a rice milling machine according to another embodiment of the present invention.
A rice milling machine 1 according to another embodiment of the present invention is an interlocking horizontal rice milling machine, and includes three polishing units 3 which are stacked vertically and are interlocked in series.
The linked rice milling machine 1 is provided with a rice grain supply section 2 on one end side of each polishing chamber 3 and a rice grain discharge section 4 on the other end side of each polishing chamber 3. to the polishing section 3, and polishing is performed in each of the polishing chambers.
The structure of each polishing section 3 is the same as that of the single horizontal rice milling machine shown in FIG. 1, and detailed description thereof will be omitted here.

The linked rice milling machine 1 includes the raw material whiteness sensor 51 in the rice grain supply section 2 provided at one end of the polishing chamber in the first stage polishing section 3, and the polishing chamber in the final stage polishing section 3. The product whiteness sensor 52 is provided in each of the rice grain discharge sections 4 provided on the end side.
The raw material whiteness sensor 51 detects the whiteness of raw rice grains (brown rice) before polishing, and the product whiteness sensor 52 detects the whiteness of product rice grains (polished rice) after polishing.

The coupled rice milling machine 1 has a control unit similar to that of the single rice milling machine shown in FIG. Based on the target value, the table in the registration unit is referred to, the corresponding whiteness increase value is read out from the table, and the target value for the whiteness increase of the product rice grains is set.

Then, the control unit determines the whiteness increase value of the product rice grains based on the whiteness of the raw rice grains detected by the raw whiteness sensor 51 and the whiteness of the product rice grains detected by the product whiteness sensor 52. and comparing the whiteness increase value of the product rice grains with the target value of the whiteness increase of the product rice grains so that the whiteness increase value of the product rice grains matches the target value of the whiteness increase of the product rice grains. The means for adjusting the stamping accuracy in each stage, that is, the degree of pressure of the pressure lid provided at the discharge port of each rice grain discharge section 4, the number of rotations of the polishing rolls provided in each rice grain delivery section 3, the rotation speed of the polishing rolls provided in each rice grain supply section 2 Controls the opening of the shutter, etc.

Here, in another embodiment of the present invention, the continuous seat type rice milling machine 1 can arbitrarily adjust the polishing accuracy in the polishing section 3 of each stage according to the polishing method such as grinding type or friction type. .

A rice milling machine 1 according to another embodiment of the present invention comprises a plurality of polishing sections 3, each of which is provided with a rice grain supply section 2 on one end side and a rice grain discharge section 4 on the other end side thereof, and feeds rice grains to the first stage. A continuous seat type rice milling machine that is moved from the polishing section 3 to the final polishing section 3 and polished in order in each of the polishing chambers, wherein the rice grain supply section is provided on one end side of the polishing chamber in the first polishing section 3. 2 is provided with the whiteness sensor 51 for the raw material, and the whiteness sensor 52 for the product is provided at the rice grain discharge section 4 provided on the other end side of the polishing chamber in the final stage polishing section 3, and the control section The whiteness increase value of the product rice grains obtained from the whiteness of the raw rice grains detected by the raw whiteness sensor 51 and the whiteness of the product rice grains detected by the product whiteness sensor 52 corresponds to the target value of the yield. The whiteness sensors 51 and 52 detect the whiteness of the raw rice grains at the first stage and the whiteness of the raw rice grains at the final stage. The whiteness of each product rice grain can be measured accurately in an instant, and high-precision yield control can be performed in real time based on the change in the whiteness of the rice grain color (increase in whiteness) before and after polishing.

In another embodiment of the rice milling machine 1 of the present invention, the rice grains are provided on the other end side of each polishing chamber in the polishing sections 3 of each stage other than the final stage, here the polishing sections 3 of the first stage and the second stage. An intermediate product whiteness sensor 53 for detecting the whiteness of the intermediate product rice grains during polishing can be provided in the discharge unit 4 .

Then, the control unit increases the whiteness of the intermediate rice grains obtained from the whiteness of the raw rice grains detected by the raw whiteness sensor 51 and the whiteness of the intermediate rice grains detected by the intermediate whiteness sensor 53. The value matches the target value for increasing the whiteness of the intermediate rice grains set within the range of the target value for increasing the whiteness of the product rice grains, and the whiteness of the raw material rice grains detected by the whiteness sensor 51 for raw material. The whiteness increase value of the product rice grains obtained from the whiteness of the product rice grains detected by the product whiteness sensor 52 is set in correspondence with the target value of the yield. Each stamping accuracy adjustment means in each stage can be controlled to match with .

Here, the target value for increasing the whiteness of the intermediate product rice grains is determined by the operator within the range of the target value for increasing the whiteness of the product rice grains according to the number of the polishing units, the polishing method of each stage of the polishing unit, and the like. can be set manually by inputting or automatically by the control unit.

In the rice milling machine 1 according to another embodiment of the present invention, the target value for increasing the whiteness of the rice grains is set stepwise for each stage of the polishing section 3, and the whiteness sensor 53 for intermediate grains If the whiteness of rice grains is to be detected, the whiteness of the raw rice grains, the whiteness of the intermediate rice grains, and the whiteness of the product rice grains should be instantaneously and accurately measured by the whiteness sensors 51, 52, and 53, respectively. Therefore, more accurate yield control can be performed in real time based on the change in the whiteness of the rice grain color (increase in whiteness) before and after the start of polishing.

In other embodiments of the present invention, the whiteness sensor 53 for the intermediate product is not essential, and can be provided or used as required.

In another embodiment of the present invention, the linked rice milling machine has a plurality of polishing parts 3 stacked vertically and linked in series. By connecting a plurality of machines in series, it is possible to form a connected rice milling machine having a plurality of polishing units.

In the embodiment of the present invention, in the single rice milling machine 1, the whitening roll 32 has been described as a friction roll, but it is not limited to this, and may be a grinding roll. can.

Further, in the embodiment of the present invention, the continuous rice milling machine 1 uses different polishing methods in the polishing sections 3 at each stage, such as using grinding rolls in the first stage and friction rolls in the latter stage. can also

In the embodiment of the present invention, the rice milling machine 1 has been described as an example of a horizontal rice milling machine, but it may be a vertical rice milling machine.

It goes without saying that the present invention is not limited to the above-described embodiments, and that the configuration can be changed as appropriate without departing from the scope of the invention.

INDUSTRIAL APPLICABILITY The rice milling machine of the present invention is extremely useful because it is capable of highly accurate yield control in real time.

1 Rice milling machine 2 Rice grain supply unit 21 Grain feeding tube 22 Screw roll 23 Grain feeding chamber 24 Raw material supply port 25 Raw material supply tube 26 Main shaft 27 Raw material supply trough 28 Rotary valve 3 Polishing unit 31 Rice polishing screen 32 Polishing roll 33 Polishing chamber 34 Dust collection Chamber 35 Dust collection duct 4 Rice grain discharge part 41 Rice grain discharge cylinder 42 Rice grain discharge port 43 Rice grain discharge trough 44 Pressure lid 51 Raw material whiteness sensor 52 Product whiteness sensor 53 Intermediate product whiteness sensor 6 Control unit 61 Setting unit 611 Adjustment button 612 Setting button 613 Target yield value display unit 614 Product yield value display unit 62 Registration unit 7 Stamping precision adjusting means

Claims (10)

a stamping accuracy adjusting means for adjusting the stamping accuracy of rice grains;
A rice milling machine comprising a control unit that controls the stamping accuracy adjusting means,
Equipped with a raw material whiteness sensor that detects the whiteness of raw rice grains before polishing and a product whiteness sensor that detects the whiteness of product rice grains after polishing,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor is the yield target. A rice milling machine characterized by controlling the polishing precision adjusting means so as to match a target value for increasing the whiteness of product rice grains set corresponding to the value. A polishing unit having a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, a polishing section having a polishing chamber formed between the porous cylinder and the polishing roll, and one end side of the polishing chamber A single rice milling machine in which a rice grain supply unit is provided at the end and a rice grain discharge unit is provided at the other end, and the rice grains are polished in the polishing chamber,
The raw material whiteness sensor is provided in the rice grain supply unit, and the product whiteness sensor is provided in the rice grain discharge unit,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for product is the yield. 2. The rice milling machine according to claim 1, wherein said polishing accuracy adjusting means is controlled so as to coincide with a target value for increasing the whiteness of said product rice grains set corresponding to the target value of . It has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing parts in which a polishing chamber is formed between the porous cylinder and the polishing roll, and one end side of each polishing chamber is provided. A continuous seat type rice milling machine having a rice grain feeding section and a rice grain discharging section on the other end side, moving the rice grains from the first stage polishing section to the final stage polishing section, and sequentially polishing the rice grains in each of the polishing chambers,
The raw material whiteness sensor is provided in the rice grain supply section provided on one end side of the polishing chamber in the first stage polishing section, and the rice grain discharge section provided on the other end side of the polishing chamber in the final stage polishing section is used for the product. Each whiteness sensor is provided,
The controller determines that the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for product is the yield. 2. The rice milling machine according to claim 1, wherein each stamping accuracy adjusting means in each stage is controlled so as to match the target value of the increase in whiteness of the product rice grains set corresponding to the target value of . It has a porous cylinder and a polishing roll rotatably disposed in the porous cylinder, and has a plurality of polishing parts in which a polishing chamber is formed between the porous cylinder and the polishing roll, and one end side of each polishing chamber is provided. A continuous seat type rice milling machine having a rice grain feeding section and a rice grain discharging section on the other end side, moving the rice grains from the first stage polishing section to the final stage polishing section, and sequentially polishing the rice grains in each of the polishing chambers,
The raw material whiteness sensor is provided in the rice grain supply section provided on one end side of the polishing chamber in the first stage polishing section, and the rice grain discharge section provided on the other end side of the polishing chamber in the final stage polishing section is used for the product. A whiteness sensor for an intermediate product for detecting the whiteness of intermediate product rice grains during polishing is provided at the rice grain discharge section provided at the other end of each polishing chamber in each stage of the polishing section other than the final stage. provided,
The control unit controls that the whiteness increase value of the intermediate rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the intermediate rice grains detected by the whiteness sensor for intermediate products is the above The whiteness of the raw rice grains and the product whiteness detected by the whiteness sensor for the raw material coincide with the target value for the whiteness rise of the intermediate product rice grains set within the target value for the whiteness rise of the product rice grains. so that the whiteness increase value of the product rice grains obtained from the whiteness of the product rice grains detected by the sensor matches the target value of the whiteness increase of the product rice grains set corresponding to the target yield value, 4. The rice milling machine according to claim 3, wherein each stamping accuracy adjusting means in each stage is controlled. a setting unit capable of inputting and setting the target value of the yield;
a registration unit capable of previously storing and registering a correspondence relationship between the yield value and the whiteness increase value,
The control unit refers to the registration unit based on the target value of the yield input and set by the setting unit, reads out the corresponding whiteness increase value from the registration unit, and determines the whiteness increase value of the product rice grains. A target value is set, and the whiteness increase value of the product rice grains obtained from the whiteness of the raw rice grains detected by the whiteness sensor for raw materials and the whiteness of the product rice grains detected by the whiteness sensor for products is the whiteness increase value of the product. 5. The rice milling machine according to any one of claims 1 to 4, wherein said polishing precision adjusting means is controlled so as to match with a target value for increasing the whiteness of rice grains. The control unit adjusts the whiteness increase value of the product rice grains obtained from the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the whiteness of the product rice grains detected by the product whiteness sensor to the product rice grains. 6. The method according to any one of claims 1 to 5, wherein the polishing accuracy adjusting means is controlled such that the whiteness increase value of the product rice grains matches the target whiteness increase value of the product rice grains by comparing with the target value of whiteness increase. The rice milling machine described in . The control unit sets a target value for the whiteness of the product rice grains based on the whiteness of the raw material rice grains detected by the raw material whiteness sensor and the target value for increasing the whiteness of the product rice grains, and sets the whiteness target value for the product rice grains. The whiteness of the product rice grains detected by the rice sensor is compared with the target value of the whiteness of the product rice grains, and the polishing precision adjustment is performed so that the whiteness of the product rice grains matches the target value of whiteness of the product rice grains. 6. A rice milling machine according to any one of claims 1 to 5, wherein said rice milling means controls means. The rice grain supply unit provided with the raw material whiteness sensor has a rotary valve, and a supply side transparent window is formed on the flow channel wall surface of the rotary valve, and the raw material whiteness sensor passes through the supply side transparent window. 8. The rice milling machine according to any one of claims 2 to 7, wherein the whiteness of raw rice grains is detected by means of the whiteness of the raw rice grains. The rice grain discharge part provided with the product whiteness sensor has a rice grain discharge cylinder, and a discharge side transparent window is formed on a peripheral wall surface of the rice grain discharge cylinder, and the product whiteness sensor extends through the discharge side transparent window. 9. The rice milling machine according to any one of claims 2 to 8, wherein the whiteness of product rice grains is detected through the whiteness of the product rice grains. The polishing accuracy adjusting means includes at least one of a pressure lid provided at the discharge port of the rice grain discharge section, the polishing roll provided in the polishing section, and a shutter provided in the rice grain supply section. 10. The rice milling machine according to any one of claims 2 to 9, wherein at least one of the pressing degree of the lid, the rotation speed of the polishing roll, and the opening degree of the shutter is controlled.

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