JP2794515B2 - Advanced milling method based on estimation of rice weight outside milling tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for highly refined rice for brewing, and more particularly to a method for measuring the weight of rice in polished rice necessary for automatically performing highly refined rice. The present invention relates to a method for reducing the invalid rice milling time caused by the stoppage of the milling operation and improving the finishing accuracy to a preset product milling degree.

[0002]

2. Description of the Related Art In order to highly refine rice for brewing, it is necessary to mill rice up to the inner layer of the rice. In the process of high-milling, rice layers having different properties from the surface layer to the inner layer of the rice are milled. Will be done.

[0003] Therefore, in high-grade rice milling, the most suitable milling conditions for the properties of each layer of rice (the number of revolutions of the milling roll main shaft of the milling machine, the load current value of the motor driving the main shaft, the resistance lid opening or the milling). Rice flow into the room). As such a rice milling device, for example, Japanese Patent Laid-Open No. 3-72
No. 961 "Fully automatic rice milling machine"
No. 8 “Automatic rice milling machine” is available.

[0004] In any of the above apparatuses, in order to achieve a preset yield (product whiteness) set in advance, the weight of the rice in the polished rice is detected so as to satisfy the optimal polished conditions according to the yield in the polished rice. The achievement of the yield is determined, and the spindle speed, the load current value, and the opening (or inflow amount) are automatically controlled.

[0005]

[Problems of the prior art] However, the detection of the weight of rice in polished rice is
A weight detection sensor such as a load cell is provided in a milling tank called a hanging tank, and the measurement is performed constantly or at regular intervals.
Therefore, the weight of rice in a stone or an elevator, that is, the weight of rice outside the milling tank is ignored. As a result, for example, there is a difference between the set yield and the product yield after milling, and the milling conditions to prepare for the set yield are also:
There is a need to prepare data in consideration of the weight of rice outside the rice polishing tank in advance.

[0006] These can be corrected to some extent by the experience and intuition of a skilled rice miller, but it is necessary to constantly monitor the equipment during the milling for a long time. It is very difficult in reality. Further, in a device for sticking and measuring all of the white rice in the rice milling tank at regular intervals, the rice milling operation is stopped during that time, and there is a drawback that the time of invalid rice milling increases particularly in the case of high-grade rice milling.

[0007]

SUMMARY OF THE INVENTION The present invention sets the finished product yield by calculating the yield from the rice weight in the rice milling tank, ie, the weight of the rice inside the tank and the estimated rice weight outside the tank, ie, the weight outside the tank. The task is to make the yield as close as possible. In addition, the data of rice preparation conditions to be prepared in advance
It is an object of the present invention to eliminate the necessity of preparing an estimate of the amount of circulating rice outside the milling tank and to reduce the time of invalid milling due to the suspension of milling work for measuring the rice weight.

[0008]

The present invention has the following features. Divide the sum of the rice weight in the rice milling tank, which is constantly detected during operation of the automatic rice milling machine, and the estimated rice weight outside the rice milling tank by the weight of the rice stuck in the rice milling tank before starting operation. The value obtained as a current yield in the milling process, this current yield value, the rotation speed of the milling roll main spindle of the rice mill, the load current value of the motor driving the main spindle, resistance, which corresponds to the milling yield value in advance From the milling conditions composed of control data such as the lid opening or the inflow amount of rice into the milling chamber, the selection of conditions to be provided for effective control for milling, and the advanced milling method for processing as setting information of the conditions. At a predetermined stage approaching the set yield value, all the circulating rice was put into the milling tank and its weight was measured.
The estimated rice weight outside the milling tank is corrected, and the subsequent milled rice is treated as the corrected estimated rice weight.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an automatic rice polishing apparatus will be described with reference to FIG. 1. Reference numeral 1 denotes a rice polishing tank using a hanging tank, and a shutter 2 is provided below the rice polishing tank. Reference numeral 3 denotes a rice mill, which is provided with a grain feed port 4 having a built-in grain feed valve adjustment device. When the shutter 2 is opened, rice is fed from the rice mill tank 1 through the grain feed port 4 to the rice mill 3. It flows into the refining room. The grain feeding valve adjusting device adjusts the amount of rice flowing into the milling room.

A polishing roll is provided in the polishing chamber of the rice mill 3 and a discharge port 5 is provided in a lower portion of the polishing chamber. The outlet 5 is provided with a resistance lid opening degree adjusting device including a resistance lid and a weight attached to the resistance lid and adjusting the degree of opening of the resistance lid.

Reference numeral 6 denotes Manseki. The milling chamber and Manseki 6 communicate with each other through an outlet 5, and the rice which has exited the milling chamber is separated from the rice bran by the Manseki 6 and received from a discharge box 7. It is discharged to 8. Reference numeral 9 denotes an elevator, which conveys the rice in the receiving box 8 to the rice polishing tank 1.

M1 is a spindle motor for driving the milling roll spindle, M2 is an elevator motor for driving the elevator 9, M3 is a feed valve motor for driving the feed valve adjusting device, and M4 is a feed valve motor for driving the feed valve adjusting device. This is a weight motor for moving the weight of the resistance lid.

S1 is a sensor for detecting the weight of rice in the rice mill tank using a load cell, S2 is a rotation speed detection sensor for detecting the rotation speed of the milling roll main shaft, and S3 is the load current value of the main shaft motor M1. Is a current detection sensor for detecting the opening of the resistance lid S4, for example, using a potentiometer. Reference numeral 10 denotes a rotation speed controller for the main shaft of the whitening roll, which uses a stationary frequency converter.

A set yield and milling data to be used are set in the central controller. In addition, control data indicated in the milled rice data, that is, optimum spindle speed, load current value, resistance lid opening degree, etc. corresponding to the milling yield can be set, and these values are stored in the storage device of the central control device. Is done.

During operation, the rice weight in the milling tank 1 from the weight detection sensor S1, the rotation speed of the milling roll main shaft from the rotation speed detection sensor S2, and the main shaft motor from the current detection sensor S3. The load current value of M1 and the resistance lid opening from the opening detection sensor S4 are always taken into the central controller.

The central controller determines the degree of achievement of the current yield of the milled rice with respect to the set yield based on the value from the weight detection sensor S1, and determines the optimal milling control data corresponding to the milling conditions, that is, the milling yield. The spindle motor M1, the rotation speed controller 10, and the weight motor M4 are instructed to control the spindle rotation speed, the load current value, and the resistance lid opening degree, respectively, so as to meet the requirements.

Conventionally, only the weight of rice in the milling tank, that is, the weight of the rice in the tank, is detected, and the weight of the rice circulating outside the milling tank 1 through the milling chamber, Manseki 6, the elevator 9 and the like, ie, the tank weight, is detected. Outer rice weight was not detected. As a result, as described above, there is a difference between the set yield and the finished product yield, and the correction has not been made manually.
In the present invention, the data obtained by accumulating the weight of rice outside the tank so far has been obtained.
The estimated weight of rice outside the tank is added as a requirement to calculate the current yield under the rice polishing conditions. The details will be described below.

Before starting the milling operation, the weight of the rice stuck into the milling tank 1, that is, the stuck weight Ws is measured by the weight detection sensor S1, and the weight of the raw rice Wo = Ws / A ₁ (where A ₁ is the raw material) in rice milling degree, brown rice and a ₁ = _1).
Next, when the shutter 2 is opened and the operation is started, the rice is fed to the grain feeding port 4, the milling chamber of the rice mill 3, the discharge port 5, Manseki 6, the discharge cylinder 7,
The rice polishing operation is performed by circulating through the receiving box 8, the elevator 9, and the rice polishing tank 1.

After the circulation rice milling operation is started, the sum W (= W '+ w) of the weight W' in the tank, which can always be measured, and the weight w of the rice outside the tank, which cannot be constantly measured, is circulated. Treat as estimated rice weight. The estimated rice weight W and the raw rice weight W
From o, the yield during refining, that is, the current yield A is A = W
/ Wo is always calculated.

On the other hand, W / Wo is calculated from each data of the spindle speed, the load current value and the resistance lid opening degree, ie, the polished rice data, according to the whitening yield stored in the central control unit in advance. The control data corresponding to the current yield A is read out.

The read control data and the detection sensors S1, S2, S3, S4 which constantly monitor the operation status.
The central control unit compares the data from the main controller with the control data, and controls the spindle rotation speed, the load current value, and the resistance lid opening so as to keep the control data close to the control data. By introducing the sum of the outer rice weight w in the tank and the constantly measured rice weight W ′ in the tank as the current rice weight in the rice milling process, the current yield A can be obtained without interrupting the rice milling operation. = (W '+ w) / Wo
Is advanced until it approaches the set yield Ao.

When the milling proceeds and the current yield A reaches the set yield Ao, the milling also approaches the end, so that it is necessary to confirm the yield by more accurate and accurate weight measurement. Therefore, when W ′ + w = Wo · Ao, all of the rice outside the rice polishing tank 1 is put into the rice polishing tank 1 and the weight W is directly measured to correct the rice weight w outside the tank.

From the directly measured W and W ′, the corrected rice outside the tank weight wo = WW−W ′ is determined.
The rice milling work is advanced to W ′ + wo = Wo · Ao, where o is the weight of rice outside the tank, and the total weight of rice is directly measured again. Then, for example, if the condition of W-Wo · Ao ≦ N is satisfied, the milling operation is terminated assuming that the set yield has been reached. However, the N
Is the expected weight that will be scraped during circulation in the white rice frying and polishing steps after rice polishing, and the selection of the range is arbitrary.

[0025]

According to the present invention, by calculating the current yield in milling from the estimated weight of rice in the milling tank and the estimated weight of rice outside the milling tank, the finished product yield can be made as close as possible to the set yield.

Further, in preparing the preliminarily prepared rice condition data, it is not necessary to prepare a prospect for the weight of the circulated rice outside the rice polishing tank.

Further, it is possible to reduce the time of invalid rice polishing by stopping rice polishing for measuring the weight of rice in the rice polishing.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an automatic rice polishing apparatus.

Claims (1)

(57) [Claims] 1. A method of adding a rice weight in a rice milling tank, which is constantly detected during operation of an automatic rice milling machine, to a rice weight outside a rice polishing tank, which is estimated in advance, to a rice milled rice mill before starting operation. The value obtained by dividing by the weight of the milling process as the current yield in the milling process, this current yield value, in advance corresponding to the milling yield value, the rotation speed of the milling roll spindle of the milling machine, the motor of the motor that drives the spindle From the milling conditions composed of control data such as the load current value, the resistance lid opening or the amount of rice flowing into the milling room, selection of conditions to be used for effective control for milling,
And, in the advanced polishing method which is processed as the setting information of the condition, at a predetermined stage approaching the set yield value, all the circulating rice is put into the rice polishing tank, the weight thereof is measured, and the weight is measured outside the rice polishing tank. The method according to claim 1, wherein the estimated rice weight is corrected and the subsequent milled rice is treated as the corrected estimated rice weight.