JPH06104202B2 - Rice mill - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice milling machine for treating brown rice into polished rice.

2. Description of the Related Art In a rice milling machine, a whitening roll 2 provided in a whitening chamber 1 is rotated by a motor 3, and a rice hopper A is supplied from a supply hopper 4 between the rotationally driven whitening roll 2 and the inner wall of the whitening chamber 1.
Is being processed for rice polishing. The polished rice B that has been subjected to the rice polishing treatment is discharged from the outlet 5, and the separated rice bran C is stored in the bran container 7 through a passage 6 different from the outlet 5.

The rice bran container 7 is filled with the bran C, and the rice milling machine is stopped, so that the rice bran C accumulated in the bran container 7 is conventionally used, as seen in No. 61-44233. A switch 8 that is pushed up to operate is provided, and the operation of the motor 3 is stopped when the switch 8 operates.

In addition, this Japanese Utility Model Publication No. 61-44233 shows an example in which the bran container 7 is arranged in the vicinity of the polishing chamber 1. However, the discharged bran C can be set so that the position of the bran container 7 can be arbitrarily set. It is also seen that the air is transported to an appropriate position.

Problems to be Solved by the Invention In such a conventional configuration, the bran C adheres to the switch 8 and its peripheral portion, and the bran C adhered to the switch 8 solidifies when used for a long period of time, causing a detection failure. There is a problem.

An object of the present invention is to provide a rice polishing machine capable of stably detecting the full state of the bran container 7 for a long period of time.

Means for Solving the Problems The rice milling machine of the present invention is configured to pneumatically transport the bran separated into white rice and bran into a separator in a milling room, and to throw the bran recovered by the separator into a bran container. Along with the air blower for generating the air flow for the air transportation and a torque sensor interposed between the power source thereof to detect the transmission torque, the bran storage level in the bran container reaches a specified value. It is characterized in that a comparator for comparing a set value based on the detected value of the torque sensor and a detected value of the torque sensor from time to time is provided.

Further, when a dedicated torque sensor cannot be provided only for detecting the bran level of the bran container, the bran level can be detected using the detection value of the torque sensor provided for automatic control of the brazing accuracy.

Operation According to this structure, when the bran storage level in the bran container is full, the flow of the air flow in the separator becomes poor, and the load of the blower viewed from the power source becomes heavy. With the torque sensor, an increase in load is detected as an increase in torque,
The comparator judges the level of the detected torque from time to time to judge whether or not the bran container is full.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. It should be noted that components having the same functions as those of the conventional example shown in FIG.

FIG. 1 shows a rice polishing machine of the present invention. The bran C separated and discharged in the whitening chamber 1 is transported by air to a cyclone 10 as a separator, accompanied by an air flow generated by a fan 9 as a blower. In the cyclone 10, the bran C and the air flow are separated, and the bran C is stored in the bran container 7. The fan 9 is rotationally driven by a dedicated motor 11. Here the motor 11
Between the output shaft of the fan and the input shaft of the fan 9
Is installed.

The occasionally detected value S _t of the torque sensor 12 is compared with the set value S _OF in the comparator 13. The set value S _OF is preset as follows.

When the bran container 7 is filled with the bran C, the air flow in the cyclone device 10 becomes poor, and the load of the fan seen from the motor 11 becomes heavy. The torque sensor 12 detects an increase in load as an increase in torque. Set value S
_OF is set to the detection value S _t of the torque sensor 12 when the bran container 7 is filled with the bran C, and the comparator 13 sets “S _t
When "S _OF " is detected, it is determined that the bran container 7 is full.

The output of the comparator 13 is supplied to the operation control unit 14. The operation control unit 14 is configured to start energizing the motors 3 and 11 when detecting the operation start instruction P, and to stop energizing the motors 3 and 11 when it is determined that the bran container 7 is full. Since it can be automatically stopped, overflow of the bran container 7 can be prevented.

Further, since the change of the load of the fan 9 is detected by the torque sensor 12 to detect the fullness of the bran container 7 as described above, a capacitance type level meter or a mechanical switch is installed in the bran container 7. Therefore, stable operation can be expected for a long period of time without any malfunction such as the detection of the full state.

FIG. 2 shows an embodiment in which a torque sensor is commonly used for controlling the precision of brazing and for detecting the level of the bran container. Here, the whitening roll 2 and the fan 9 are connected to the motor 3 via the torque sensor 12, and the detected value S _t of the torque sensor 9 from time to time is changed.
Based on this, the control of the precision of bran and the level detection of the bran container are carried out. Since the level detection of the bran container is the same as the configuration shown in FIG. 1, the same reference numerals are given and the description thereof is omitted. In addition, since the set value S _OF changes with the change of the biting accuracy, the level of the bran container can be detected with any biting accuracy. The control of the hammering accuracy is carried out as shown in FIG.

The feed roll 15 and the whitening roll 2 are attached to a hollow shaft rotatably supported from the fixed side via bearings 16 and 17. The shaft 18 is rotationally driven by the motor 3 via pulleys 19 and 20 and a belt 21. A shaft 22 is supported to be movable up and down inside the shaft 18, and a disc-shaped opening regulating plate 23 is attached to the lower end of the shaft 22. Reference numeral 24 is an outlet forming member which is arranged at the bottom of the polishing chamber 1 in the vicinity of the opening degree regulating plate 23 and is formed in an annular shape. Whitening room 1
A net 25 for separating the white rice and the bran is provided around the periphery of the whitening roll 2 inside. Reference numeral 26 is an actuator for moving the shaft 22 up and down. A lever 27 whose center is pivotally supported from the fixed side, one end E _{1 of which} is engaged with the upper end of the shaft 22, a screw shaft 29 on which a feed screw 28 is formed, and a screw shaft 29 A motor 30 for rotating a screw shaft 29, a cylindrical body 33 having a hole 31 having an inner diameter larger than the diameter of the screw shaft 29, and a pin 32 engaging with the other end E _{2 of the} lever 27 formed on the outer periphery, and an upper end E. ₃ is screwed into the feed screw 28 of the screw shaft 29, and the lower end E ₄ has a hole 34 with an inner diameter larger than the diameter of the screw shaft 29.
Has a U-shaped frame body 35 and a hole 36 having an inner diameter larger than the diameter of the screw shaft 29, and is inserted into the screw shaft 29 between the cylindrical body 33 and the upper end E ₃ of the frame body 35. Plate 37 and hanging rods 38, 39 that support the plate 37 so that it does not rotate as the screw shaft 29 rotates.
And compression springs 40 and 41. Here, the biasing force of the compression spring 40 is larger than that of the compression spring 41, and the plate 37
Is pushed down to a position where it comes into contact with the stopper nuts 42 and 43 as shown in the figure. Reference numeral 44 denotes a control unit of the actuator 26, which compares the detected value S _t of the torque sensor 12 from time to time with the set value S _o according to the target straining accuracy, and moves the detected value S _t toward the set value S _o toward the motor. Drive 30

With this configuration, the brown rice A fed from the supply hopper 4 is the whitening roll 2 which is rotationally driven by the motor 3.
It is pushed around by the feed roll 15 and whitened.
Air D is blown into the internal passage 45 of the shaft 18, and the air D passes through a hole 46 formed in the shaft 18, a hole (not shown) formed in the whitening roll 2 and a net 25. The bran C that has flowed to 47 and has been separated by the whitening treatment passes through the net 25 and is discharged to the passage 47. The polished rice is an opening control plate
An annular passage formed between 23 and the outlet forming member 24
It is dispensed from 48 and dispensed to the exit 5 different from the passage 47.

If the accuracy is too high, the control unit 44 detects that the condition is “set value S _o <detection value S _t ”, and the control unit 44 causes the motor 30 to rotate in the direction in which the frame body 35 rises. Compression spring
The compression force of 40 is reduced, and one end E _{1 of the} lever 27 is rotated downward. As a result, the shaft 22 descends and the opening regulation plate 23
Descends to the position of the virtual line, and the passage 48 becomes larger. If the accuracy is not sufficient, the control unit 44 sets “Set value S _o
> Detected value S _t ″, the control unit 44
The frame 35 is rotated in the direction in which the frame 35 descends to increase the compression force of the compression spring 40, and the one end E _{1 of the} lever 27 is rotated upward. As a result, the shaft 22 rises, the opening regulation plate 23 rises, and the passage 48 becomes smaller.

In this way, the opening degree of the passage 48 for the outflow of white rice can be automatically adjusted on the basis of the detection output of the torque sensor 12, and the grinding accuracy can be stably maintained at the target grinding accuracy.

In each of the above-described embodiments, the case where the fan 9 as a blower is arranged in front of the cyclone device 10 as a separator and the bran C sucked by the fan 9 is pressure-fed toward the cyclone device 10 will be described as an example. However, the same applies to a case where an air exhauster as an air blower is disposed in the subsequent stage of the separator and air is transported by a vacuum suction type.

Although the cyclone 10 is used as the separator in the above-mentioned embodiment, the same applies to the case where the cyclone 10 is separated through a filter.

EFFECTS OF THE INVENTION As described above, according to the present invention, the bran separated into white rice and bran in the polishing room is pneumatically transported to a separator, and the bran collected by the separator is put into a bran container. A wind sensor for generating an air flow for the air transportation and a torque sensor interposed between the power source thereof to detect a transmission torque, and the torque when the bran storage level in the bran container reaches a specified value. Since a comparator for comparing the detected value of the torque sensor with the set value based on the detected value of the sensor is provided, when the bran storage level in the bran container is full, the flow of air in the separator becomes poor, The load of the blower from the viewpoint of the power source becomes heavy, and the torque sensor detects the increase in load as an increase in torque.The level of detected torque is sometimes judged by the comparator and the output signal of the comparator is detected. Kara bran container is full It is possible to automatically detect that the state has entered.

As described above, the load change of the blower is detected to detect the full state of the bran container.Therefore, a capacitance level meter or mechanical switch is installed in the bran container to detect the full state. It is possible to expect stable operation for a long period of time without any malfunction as performed.

Furthermore, when the polishing roll and the air blower for pneumatic transportation of the bran are configured to be driven by a single power source, a single torque sensor is used for controlling the precision of the bran and for detecting the level of the bran container. Can be shared, and the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the rice milling machine of the present invention, FIG. 2 is a block diagram of another embodiment, FIG. 3 is a longitudinal sectional view showing the main configuration of the same device, and FIG. It is a block diagram of a rice milling machine. A: Brown rice, C: Bran, 1 ... Whitening chamber, 2 ... Whitening roll, 3,11 ... Motor [power source], 7 ... Bran container, 9 ...
Fan [blowing device], 10 ... cyclone device [separator], 12 ... torque sensor, 13 ... comparator, 26 ... actuator, 44 ... control unit.

Claims (2)

[Claims] 1. A structure in which the bran separated into white rice and bran in a polishing room is pneumatically transported to a separator, and the bran recovered by the separator is put into a bran container, and the air for the pneumatic transportation is also provided. A torque sensor that is interposed between a blower that creates a flow and a power source for detecting the transmitted torque, and a set value based on the detected value of the torque sensor when the bran storage level in the bran container reaches a specified value. And a comparator that compares the detected values of the torque sensor from time to time. 2. The whitening roll provided in the whitening chamber is rotationally driven to whiten the brown rice fed into the whitening chamber and discharge it from the white rice outlet of the whitening chamber to adjust the opening of the white rice outlet. A torque sensor that is configured to vary the hammering accuracy, is interposed between the whitening roll and a power source that rotationally drives the whitening roll, and detects a transmission torque, a signal corresponding to the target hammering accuracy, and the torque sensor. The control unit that operates the actuator that adjusts the opening degree in the direction in which the actual grinding accuracy of the white rice discharged from the white rice outlet approaches the target grinding accuracy by comparing with the detected torque of The air blower that creates an air flow for pneumatically transporting the bran separated into bran to the separator is configured to be driven by the power source, and the torque sensor when the bran storage level in the bran container reaches a specified value. Based on the detected value of Value and occasional detection value rice mill provided with a comparator for comparing the torque sensor.