JPH11226435A - Rice cleaning machine controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the burden at the time of restarting by eliminating the sticking fast of rice grains at the time of operation shutdown and to prevent the occurrence of the unequalness in cleaning degree at the restart of operation. SOLUTION: This rice cleaning machine controller has a rice cleaning motor 20 for rotating a rice eleaning roll, an end sensor for detecting the end of rice eleaning and a motor control section 28 for inverting the rice eleaning motor 20 for a specified time in accordance with the output of an uncleaned rice sensor. The residual rice remaining in a cleaning chamber is loosened and the sticking thereof is prevented by inverting the rice eleaning motor 20 for a specified time when the rice eleaning ends and, therefore, the load at the time of restart can be lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a once-through rice mill.

[0002]

When the rice mill is stopped in a state where there is some residual rice in the rice mill, the residual rice sticks and becomes overloaded at the time of restarting. Requires several times as much starting torque as during the operation. Therefore, when the operation is stopped, the supply of brown rice from the brown rice tank is cut off, the milling roll is idled, the operation is stopped after reducing the rice grain pressure in the milling room, and the load at the time of restart can be reduced, but in this case, Since some residual rice remains, a certain effect cannot be expected. As an improvement, there is a method in which the milling machine is operated by turning the milling roll back to normal rotation after the milling roll is reversed at the start-up to release the sticking of the rice grains in the milling chamber to reduce the internal pressure of the milling chamber. However, in this method, if the elapsed time from the previous use is long, the sticking of rice grains is remarkable, the reversal of the whitening roll becomes heavy, and it may be difficult to start the rice polishing motor, and it takes time to start rice polishing. However, there is a problem that the user is distracted. In particular, in the case of twice-milling, the temperature in the milling room becomes high, and the adhesion and solidification of rice grains become remarkable. If left as it is, it cools and solidifies, which is likely to hinder the operation of the rice mill. Therefore, an object of the present invention is to eliminate sticking of rice grains at the time of stopping the operation, reduce the load at the time of restarting, and prevent unevenness of the degree of milling from occurring at the time of restarting the operation.

[0003]

A rice-milling machine control device according to the present invention comprises a rice-milling motor for rotating a rice-milling roll, an end sensor for detecting the end of rice polishing, and a rice-milling motor based on the output of the end sensor when the rice is finished. And a motor control unit for inverting the control signal for a predetermined time.

[0004]

Embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a sectional view of a rice mill, FIG. 2 is an enlarged sectional view of a main part, FIG. 3 is a sectional view of a drive mechanism of a whitening roll,
FIG. 4 is a wiring diagram. Rice milling tank 2 on top of rice milling machine 1
And a brown rice sensor 3 for detecting the presence or absence of brown rice R as an end sensor is attached to the bottom of the rice milling tank 2. The bottom outlet of the rice mill tank 2 is connected to the grain feeding room 4. Reference numeral 5 denotes a milling room connected to the grain feeding room 4, which comprises a space surrounded by a whitening roll 6 and a whitening cylinder 7 on the outer periphery thereof. 8 is whitening roll 6
This is a helical spiral formed at the base end of the. Reference numeral 4a denotes a return port for semi-polished rice, which communicates between the bottom discharge port of the tank 2 and the middle of the grain-feeding chamber 4 and to the grain-feeding chamber 4 of the milling chamber 5.

[0005] A resistance plate 10 is provided at the white rice discharge port 9 at the end of the milling room 5, and the resistance plate 10 is urged by a spring 11 in a direction to close the white rice discharge port 9. The degree of milling is adjusted by changing the spring pressure of the spring 11 with the dial 11a.
A bran collecting part 12 is connected to the lower side of the whitening cylinder 7, a suction hose 13 is connected to the bran collecting part 12, and a distal end thereof is connected to an intake fan 14.
The outlet side of the intake fan 14 is connected to a bran storage tank 16 via a duct 15. 17 is a cyclone. An intake switching damper 18 is provided on the suction side of the intake fan 14, an auxiliary suction hose 13 a is switchably connected to the suction hose 13, and the tip of the auxiliary suction hose 13 a is connected to the white rice outlet 9. A pressure-feeding fan 19 is provided coaxially with the intake fan 14, and a pressure-air duct 36 of the pressure-feeding fan 19 is connected to the hollow portion of the whitening roll 6.
4 is supplied to the milling room 5 from the milling roll 6.

Reference numeral 20 denotes a milling motor, which is connected to a milling roll pulley 23 fixed to one end of the milling roll 6 by a belt 22 from a motor pulley 21, and further passes through a transmission pulley 24 of the milling roll 6, and is connected to the intake fan 14 and the pressure feeding fan 19. The belt 27 is connected to a fan pulley 26 attached to a common rotating shaft 25. Rice milling roll 6 by rice milling motor 20
Then, the intake fan 14 and the pressure-feed fan 19 are rotated. The rice polishing motor 20 is provided with a motor control unit 28. The motor control unit 28 includes a power switch 29, a control unit 30, a forward switch 31 and a reverse switch 32, and as shown in the wiring diagram of FIG. 4, the power switch 29, the forward switch 31 and the reverse switch. The rice milling motor 20 via the heater 32
Connect to 00V power supply. Then, the control unit 30 sends a forward rotation signal to the forward rotation control coil 33 of the forward rotation switch 31 and a reverse signal to the inversion control coil 34 of the reverse switch 32 to rotate or reverse the milling motor 20. . The control unit 30 includes a CPU 30a, a forward relay 30b, and a reverse relay 30c. Examples of the brown rice sensor 3 include an optical sensor type, a capacitance type, a piezoelectric type, a vibration type, and a microswitch covered with a bellows. The installation position,
Not only the bottom of the rice milling tank 2 but also the vicinity of the entrance of the grain feeding room 4 or the vicinity of the exit of the milling room 5 may be appropriately designed according to the characteristics of the sensor. When the brown rice sensor 3 is located at the bottom of the rice milling tank 2 in consideration of the accumulation of brown rice from the rice milling tank 2 to the milling room 5 between the time when the brown rice sensor 3 detects and the time when the rice polishing motor 20 is stopped. Is 10 seconds, for example, 3 seconds if it is near the exit of milling room 5
By delaying the inversion signal from the CPU 30a, the retention of brown rice is reduced as much as possible. As the end sensor, in addition to the brown rice sensor 3, a current sensor that detects a decrease in the current of the rice polishing motor 20 can be considered.

The operation of the rice mill according to the present invention and the operation of each part will be described. Milling machine 1 is controlled to three-phase 200
Connect to V power supply and put rice mill 1 in standby state. Then
The brought brown rice R is put into the rice mill tank 2. The brown rice sensor 3 of the rice milling tank 2 detects the presence of the brown rice R by input, and sends a signal to the motor control unit 28. CP of control unit 30
U30a operates the forward rotation relay 30b, closes the forward rotation switch 31, and starts the rice polishing motor 20 to the forward rotation side. At this time, since the whitening roll 6 was inverted at the last stop,
The semi-brown rice remaining in the milling room 5 is not adhered to the milling roll 6 or milling cylinder 7 and does not become a large load in a loose state, and the milling motor 20 is easily started. In this state, the brown rice R enters the grain feeding chamber 4 from the rice mill tank 2 and is fed to the milling chamber 5 by a grain feeding spiral 8 integrated with the milling roll 6. Miling room 5
Then, the brown rice R is milled between the milling ridge formed on the outer circumference of the milling roll 6 and the milling cylinder 7. Brown rice R increases in temperature due to friction during whitening, and may change quality as it is,
Air is blown from the pressure-feed fan 19 to the rear of the whitening roll through the pressure-air duct 36 to cool the brown rice R by air. The milled white rice is sent to the milled rice outlet 9 at the end of the milling cylinder 7 and is blocked by the resistor plate 10 at the mouth of the milled rice outlet 9, and the accumulated pressure of the milled rice overcomes the spring pressure of the spring 11 of the resistor plate 10. When,
It is discharged from the white rice discharge port 9 and stored in a packaging bag or the like. On the other hand, on the lower side of the whitening roll 6, the bran generated by the whitening passes through the net 35 and collects in the bran collecting portion 12, is sent to the cyclone 17 through the duct 15 by the suction fan 14 through the suction hose 13, and is separated by the cyclone 17. The rice is stored in the bran storage tank 16. The bran sent out together with the white rice from the white rice outlet 9 is sucked by the intake fan 14 through the auxiliary suction hose 13a.

When the browning sensor 3 detects that the brown rice R has run out, the CPU 30a of the control unit 30 turns off the forward rotation relay 30b, opens the forward rotation switch 31, and cleans the rice. The motor 20 is stopped, and after a predetermined time (about 10 seconds), the reversing relay 30c is operated to close the reversing switch 32, and the reversing rice motor 20 is activated. As a result, the milling roll 6 is inverted, and the pressure applied to the front of the milling chamber 5 is dispersed to the rear to prevent the rice grains from sticking. At this time, since the rice grain temperature in the milling room 5 is still high immediately after the end of the operation, the milling roll 6 can be easily inverted. When a set time has elapsed after the inversion, the CPU 30a turns off the inversion relay 30c, opens the inversion switch 32, stops the rice polishing motor 20, and stops the rice polishing machine 1.

When the milling operation of the milling machine 1 is completed, the rotating direction of the milling motor 20 is reversed, and the semi-milled rice remaining in the milling roll 6 and the milling cylinder 7 is loosened to remove the milling roll 6 and the milling cylinder 7. , The starting torque is suppressed to a low level at the time of restarting, the starting can be easily performed within the range of the starting torque of the rice milling motor 20, and even after restarting, uniform white rice is immediately discharged without leaving much time. .

[0010]

As described above, in the present invention, when the milling operation of the rice mill is completed, the rice milling motor is inverted for a certain period of time so that the remaining rice in the milling room is not loosened and fixed, so that it can be easily restarted. It is possible to discharge the polished rice at the same time as the start of operation, while keeping the operation up and controlling the variation in the degree of polished rice. Further, since the rice grain temperature in the milling room 5 is still high immediately after the end of the operation, the milling roll 6 can be easily inverted.

[Brief description of the drawings]

FIG. 1 is a sectional view of an entire rice mill according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a sectional view of a drive mechanism of the rice mill according to the present invention.

FIG. 4 is a wiring diagram of the rice mill according to the present invention.

[Explanation of symbols]

 R Brown rice 1 Rice mill 2 Rice mill tank 3 Brown rice sensor 4 Graining room 4a Half-milled rice return port 5 Milling room 6 Whitening roll 7 Whitening cylinder 8 Whitening spiral 9 White rice outlet 10 Resistance plate 11 Spring 11a Dial 12 Unit 13 Suction hose 13a Auxiliary suction hose 14 Intake fan 15 Duct 16 Bran storage tank 17 Cyclone 18 Intake changeover damper 19 Pressure feed fan 20 Rice polishing motor 21 Motor pulley 22 Belt 23 Polishing roll pulley 24 Transmission pulley 25 Rotary shaft 26 Fan pulley 27 Belt 28 Motor Control unit 29 Power switch 30 Control unit 30a CPU 30b Forward relay 30c Reverse relay 31 Forward switch 32 Reverse switch 33 Forward control coil 34 Reverse control coil 35 Net 36 Compressed air duct

Claims (1)

[Claims] 1. A milling motor that rotates a milling roll, an end sensor that detects the end of milling, and a motor control unit that inverts the milling motor for a certain period of time based on an output of the end sensor when milling ends. Rice milling machine control device.