JP2553109B2 - Method of controlling pressure plate of one-time rice milling machine - Google Patents

Description

Detailed Description of the Invention [Object of the Invention] (Industrial field of application) This invention is a one-time rice polishing that is completed before the brown rice supplied from the hopper passes through the polishing chamber and exits from the discharge port. The present invention relates to a pressure plate control method for a rice milling machine.

(Prior Art) Conventionally, when adjusting the whitening degree of a rice grain, a single-pass milling machine has adjusted the pressing force of a pressure plate provided at the whitened rice discharge port to a desired whitening degree. Here, the pressure plate has its current value controlled by an electromagnetic urging device such as a solenoid to set its pressing force.

Further, in the circulation type rice milling machine, as shown in Japanese Patent Laid-Open No. 61-129045, a resistor was provided in the middle of the circulation route of rice grains to obtain a desired polishing pressure.

(Problems to be Solved by the Invention) In the case of the above-described conventional single-pass rice milling machine, when the rice milling machine is stopped in the middle of rice polishing, the main motor is driven while being pressurized by the pressure plate during the subsequent restart. However, there was a problem in that the rice grains were clogged in a pressured state in the spar chamber and could not be restarted smoothly. Furthermore, in order to solve this, the main motor was enlarged or a separate starting device was provided, but there was a drawback that the device became large and the cost was high.

Further, in the case of the above-mentioned conventional circulation type rice milling machine, when the main motor is stopped in the middle of polishing, and when restarting after that, when the start switch is turned on, the resistor retracts, and the main motor becomes smaller after the resistance decreases. However, there is a drawback that the device becomes complicated and the cost becomes high, and there is a time lag from the operation of the start switch to the rotation of the main motor, which is not preferable.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and provides a method for controlling a pressure plate of a single-pass rice milling machine which has a simple structure and can easily restart a main motor. To aim.

[Structure of Invention]

(Means for Solving Problems) The present invention is such that, when the main motor is temporarily stopped during the training, the pressing force of the pressure plate is weakened in conjunction with this and the original pressing force is re-established after the subsequent restart. It is a method of controlling the pressure plate of the one-time rice polishing machine in which the pressure force of the pressure plate is once weakened at the time of restart and the main motor is stopped and then the original pressure force is returned to perform polishing.

(Operation) The pressure plate control method for the single-pass rice milling machine according to the present invention makes the load on the main motor small and restarts quickly and smoothly when the main motor is restarted when the main motor is temporarily stopped during the polishing process. It was done like this.

(Examples) Examples of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the one-time rice milling machine of this embodiment is as follows.
A polishing roll 2 is housed in the polishing chamber 1, an inlet 3 of brown rice is formed at the base end of the polishing chamber 1, and a hopper (not shown) is attached to the inlet 3. Further, a bran removal mesh 4 is attached to the tip of the bran sperm chamber 1, and a pressurizing plate 6 is located at the tip of the polished rice discharge port 5 at the tip of the bran seizure 4 to close the opening. 6 is connected to an electromagnetic urging device 8 such as a solenoid via a lever 7.

In addition, the Hosei roll 2 is provided with a main motor via a pulley 10, a belt 11 and a pulley 12 provided coaxially with the rotating shaft 9.
Connected to 13.

As shown in FIG. 3, in the controller of the single-pass rice milling machine of this embodiment, the main motor 13 is connected to the power source through the main motor drive relay 14 and the power switch 15, and the main motor drive relay 14 is connected to the main motor drive relay 14. The output of the microcomputer 16 is input. The microcomputer 16 includes an input port 17, an output port 18, a CPU 19, a ROM 20 and an RA.
The input port 17 has an M21, and biasing force setting means such as operation buttons for setting the biasing force of the pressure plate 6 and a start / stop for starting and temporarily stopping the main motor 13 are provided.
The output of the pause switch 23 is input. Further, the output port 18 is connected to the main motor drive relay 14 and the electromagnetic bias device drive circuit 24.

Further, the power supply circuit 25 is connected to an AC power supply, and supplies power to the main motor drive relay 14, the microcomputer 16, and the electromagnetic bias device drive circuit 24, respectively.

As shown in the flow chart of FIG. 1, the operation of the single pass rice milling machine and the control method of the pressure plate 6 in this embodiment is such that when the power switch 15 is turned on, a preset urging force p smaller than the normal urging force is applied. The signal applied to the pressure plate 6 is output from the microcomputer 16, and the electromagnetic urging device drive circuit
A driving current that gives a predetermined biasing force p by 24 is supplied to the electromagnetic biasing device 8. As a result, the pressure plate 6 presses the polished rice discharge port 5 with a force of p. Then, the urging force Pn required to obtain the desired degree of whiteness is input from the urging force setting means 22, and the start switch 23 is pressed, so that the main motor 13 starts to rotate. Here, the biasing force Pn corresponds to n (natural number) at each stage of the degree of whitening, and the larger n is, the larger the biasing force is. Also,
The relationship between the biasing force p and Pn is p <Pn, and the maximum value of n is
If it is 10 (white rice), the range of n _p corresponding to _p is 0.
≦ n _p ≦ 7.

When the main motor 13 is turned on, the CPU 19 starts counting a predetermined time t in consideration of the rising time of the rotation of the Hakusei roll 2, and when t time elapses, an output for applying the urging force Pn to the electromagnetic urging device drive circuit 24. The output is made so that the urging force of the pressure plate 6 becomes Pn. Here, biasing force p and time t
The value is set so that the relationship between and is approximately p∝t.
This is because if the biasing force p is small, the Seisei roll 2 also easily rotates and rises quickly. As a result, normal rice polishing work is performed, and when the biasing force Pn is further changed, the amount of change α is adjusted to Pn and output, and rice polishing is continued.

Further, when the rice is temporarily stopped during rice polishing for some reason, when the temporary stop switch 27 is turned on, the biasing force is controlled to be p again. Then, the urging force Pn is set later, the start switch 27 is turned on, and the pressing plate 6 is maintained in the state of maintaining the urging force p until the time t has elapsed. After that, the same control as above is performed, and the rice polishing is continued until the power switch 15 is turned off.

According to this embodiment, even if the main motor 13 is turned off during rice polishing, the urging force of the pressure plate 6 is weakened from Pn to p in conjunction with this, so that later restarting can be easily performed. Moreover, since the urging force of the pressure plate 6 is weakened in conjunction with the temporary stop, it is a weak urging force from the moment the main motor 13 rises at the time of restart, and it is very easy to start up, and the start switch 27 of the main motor 13 There is no need to delay the time from ON to the start of driving the main motor 13.

Next, a second embodiment of the pressure plate control method for the single-pass rice milling machine of the present invention will be described with reference to FIG. Here, the structure of the rice polishing machine is the same as that of the first embodiment, and the description thereof is omitted.

In this embodiment, the urging force Pn is set and the power switch 15 is turned on.
When turned on, the electromagnetic urging device 24
A command is issued to generate an urging force Pn, and the pressing plate 6 presses the polished rice discharge port 5 with the urging force Pn by the electromagnetic urging device 8. Then, when the start switch 23 is turned on, the main motor 13 is turned on, and in conjunction with this, the microcomputer
A command is issued from 16 to weaken the biasing force to p, and the electromagnetic biasing device 8 weakens the biasing force of the pressure plate 6 to p.
Further, at the same time, the CPU 19 starts counting the time t, and returns the biasing force of the pressure plate 6 to Pn again after the time t has elapsed.
The relationship between the biasing forces Pn and p and the time t in this embodiment is the same as that in the first embodiment. Then, as in the first embodiment, if there is a change in the urging force, this is performed and the pause switch 23 is turned on.
Then, it is fixed to the biasing force Pn and stops. Then, the pressing plate 6 continues to maintain the biasing force Pn until the start switch 23 is turned on again, the same control as described above is performed, and the power switch 15
Rice polishing work continues until is turned off.

According to this embodiment, the pressing plate 6 presses the polished rice discharge port 5 with the biasing force Pn even during the temporary stop, so that the rice grains do not spill from the polished rice discharge port 5 during the stop.

In addition, the pressure plate control method of the one-time rice milling machine of the present invention,
In addition to the one using a microcomputer, a dedicated logic circuit may be assembled.

〔The invention's effect〕

The method of controlling the pressure plate of the one-time rice milling machine of the present invention is such that, when the main motor is temporarily stopped during the polishing process, the urging force of the pressure plate is weakened in conjunction with this stop, or the main motor is re-activated later. Since it is weakened at the time of startup, the rotation of the main motor, that is, the Seisei roll, can be started up extremely quickly and smoothly. In addition, weakening the urging force of the pressure plate is temporary, and the rice discharged when the urging force is weak is a grain of rice that has been whitened by that time, and brown rice and half-polished rice are not mixed.

In addition, since starting the main motor has become easier,
There is no need for a high-power motor or starter as in the past,
It has a great cost effect.

[Brief description of drawings]

FIG. 1 is a flow chart showing a pressure plate control method of a first embodiment of the present invention, FIG. 2 is a vertical sectional view of a single-pass rice milling machine of this embodiment, and FIG. 3 is a block of a control device of this embodiment. 4 and 5 are flow charts showing a pressure plate control method according to the second embodiment of the present invention. 1 …… Sewage room, 5 …… Polished rice discharge port, 6 …… Pressure plate, 8 …… Electromagnetic urging device, 13 …… Main motor, 22 …… Biasing force setting means, 23 …… Start / pause switch

Claims (2)

(57) [Claims] 1. A pressurizing plate urged by an electromagnetic urging device so as to block the polished rice discharge port of the polishing chamber, and a urging force setting means for setting a drive current of the electromagnetic urging device to a predetermined value. In the pressure plate control method of the continuous rice milling machine, when the main motor is temporarily stopped, the driving current of the electromagnetic urging device is made smaller than that during normal polishing and the urging force of the pressure plate is weakened. When the main motor is started again later, the weak biasing force is further maintained for a certain period of time that is approximately proportional to the weak biasing force, and after a certain period of time, the drive current of the electromagnetic biasing device is returned to the original value. A method for controlling a pressure plate of a single-pass rice milling machine, comprising: returning the urging force of the pressure plate to a predetermined polishing pressure to perform polishing. 2. A pressurizing plate urged by an electromagnetic urging device so as to close the polished rice discharge port of the polishing chamber, and a urging force setting means for setting a drive current of the electromagnetic urging device to a predetermined value. In the pressure plate control method of the continuous rice milling machine, when the main motor is temporarily stopped, the drive current of the electromagnetic energizing device is maintained at the value before the stop, and when the main motor is restarted later, the main motor is started. The drive current of the electromagnetic urging device is reduced to weaken the urging force of the pressure plate, and the weak urging force is maintained for a fixed period of time proportional to the weak urging force. A method for controlling a pressure plate of a one-time rice milling machine, comprising: returning a driving current of a power device to an original value and returning a biasing force of a pressure plate to a predetermined polishing pressure to perform polishing.