JP3664120B2 - Brown rice flow rate setting machine and rice milling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, the flow rate setting device of the brown rice in the rice apparatus, and relates to milled equipment.
[0002]
[Prior art]
A conventional rice milling apparatus has a structure as shown in FIG. 6, for example. Numeral 1 is a milling unit, which is composed of a cerealing unit 2 and a whitening unit 3, and the cerealing unit 2 communicates with the cerealing unit 2 through a guide cylinder 6 from a flow rate adjustment shutter 39 provided at the lower part of the brown rice storage hopper 5. A supply port 7 (see FIG. 2) is provided. The grain sending spiral 16 is provided inside the grain sending part 2, and the whitening roll 15 is provided inside the whitening part 3, and the outside is covered in a cylindrical shape with a demetalization wire net 4. The milling roll 15 and the cereal sending spiral 16 are mounted on a rotary shaft 18 and are rotated coaxially by a drive motor 17 which is in a conductive state by pulleys 19 and 20 and a belt 21. Further, a tub discharge hopper 22 is provided below the tub tube 1, and a compression plate 9 is provided in the discharge port 8 of the whitening portion 3 of the tub tube 1 in a state of being pressed against the discharge port 8 by a coil spring 13. A milled rice discharge cylinder 23 is provided below the bottom.
[0003]
In the above-described conventional rice milling apparatus, after the grain sending spiral 16 and the whitening roll 15 are rotated by the drive motor 17, the flow rate adjusting shutter 39 is opened to a predetermined opening degree, and the rice milling cylinder 1 is fed from the brown rice storage hopper 5. Supply brown rice to cereal part 2. In the milling tube 1, whitening is performed by the rotation of the whitening roll 15 while maintaining the inside of the whitening portion 3 at a predetermined pressure by the cerealing pressure by the cerealing spiral 16 and the resistance pressure on the discharge port 8 side by the compression plate 9. Brown rice bran separated from the brown rice by milling is discharged out of the milling pipe 1 from the stripping wire mesh 4 of the milling section 3 and discharged out of the rice milling machine through the lower paddy discharge hopper 22. On the other hand, the polished rice is discharged out of the milled rice mill 1 from the discharge port 8 where the compression plate 9 is opened against the urging force of the coil spring 13 due to the internal pressure of the polished portion 3, and goes to the next process from the polished rice discharge cylinder 23. Sent. At this time, by adjusting the resistance pressure of the compression plate 9 by the coil spring 13 with the adjusting screw 14, the pressure in the whitening portion 3 is adjusted and set to a predetermined whitening degree.
[0004]
While continuing the rice milling work as described above, the degree of milling is not limited even though the flow rate adjustment shutter 39 is opened at a predetermined opening degree so that the flow rate of the brown rice supplied to the cerealing section becomes the target flow rate. The milling worker always pays attention to the degree of milling, and if the milling degree fluctuates, adjust the resistance pressure of the compression plate 9 with the adjusting screw 14 to keep the milling degree constant. To do. For this reason, skilled skills and meticulous attention are required to maintain a constant degree of milling during the milling operation.
[0005]
[Problems to be solved by the invention]
In view of the above points, an object of the present invention is to make it possible to continue stable rice milling work with a constant degree of milling without requiring skilled skills.
[0006]
[Means for Solving the Problems]
The present inventor has conducted intensive research to achieve the above-mentioned purpose, and the cause of fluctuation in the degree of milling is the fluctuation of the cereal flow rate. The fluctuation of the cereal flow rate is caused by uneven quality of brown rice (moisture, surface flaking) It was discovered that the friction coefficient was changed near the flow rate adjustment shutter. And as the solution, while providing the flow rate setting machine which can be controlled automatically so that the flow rate of the brown rice supplied to the cerealing part may become the target flow rate in the pre-process of the cerealing part of the rice milling device, the flow rate By setting the flow rate setting value of the setting machine below the cerealing capacity of the cerealing unit of the rice milling device, the cerealing flow rate to the milling unit is stabilized, so that the stable rice milling work with a constant degree of milling can be continued. It was.
[0007]
That is, the present invention is provided between the brown rice storage hopper and the cerealing unit of the rice milling apparatus, has an inlet that communicates with the brown rice storage hopper at the upper part, and communicates with the cerealing part at the lower part. A brown rice container having an outlet for discharging, an open / close shutter provided between the brown rice storage hopper and the inlet for supplying a predetermined amount of brown rice from the inlet, and a flow rate control means provided at the outlet. A calculation unit for calculating a brown rice flow rate per unit time flowing out from the outlet based on the amount of change in the brown rice storage amount detected by the brown rice storage amount detection unit; This can be solved by a flow rate setting machine provided with brown rice flow rate control means for adjusting the flow rate of brown rice flowing out from the outlet by the flow rate control means so as to match the target flow rate based on the flow rate of brown rice calculated by the calculation means.
Therefore, by opening and closing the open / close shutter, a portion (predetermined amount) of brown rice stored in the brown rice storage hopper is supplied to the brown rice container through the inflow port. From the reduction amount (change amount) of the predetermined amount of brown rice supplied to the brown rice container, the flow rate of brown rice per unit time flowing out from the outlet can be calculated using the calculating means. Compare this calculated brown rice flow rate with the target flow rate according to the target milling degree, adjust the brown rice flow rate with the brown rice flow rate adjusting means so that both are the same, and let the brown rice flow at a constant flow rate relative to the cereal part Supply. Further, when brown rice is supplied to the cereal feeding unit at the target flow rate and the milling degree of the polished milled rice is different from the target milling degree, the milling degree is adjusted by an adjusting screw or the like.
[0008]
The target flow rate is set to be equal to or less than the threshing ability of the cerealing unit of the rice milling apparatus, and more preferably set to a value smaller than the threshing ability of the cerealing part.
[0009]
By configuring the brown rice capacity detection means with a pair of upper and lower proximity switches provided in the brown rice container, level detection without malfunction due to brown rice dust as in the case of detecting with a photoelectric switch etc. Can be done accurately.
[0010]
The proximity switch is configured by a capacitance type.
[0011]
You may comprise the said flow control means from the flow control shutter which opens and closes the outlet of a brown rice container, and the flow control motor which adjusts the opening degree of this flow control shutter.
[0012]
In the rice milling apparatus according to the present invention, the brown rice flow rate setting machine is provided between the brown rice storage hopper and the cereal sending section.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the entire rice milling apparatus provided with a flow rate setting machine B according to the present invention, FIG. 2 shows the main part of the rice milling apparatus, and FIG. 3 shows the flow rate setting machine B. The basic structure of the rice milling machine main body A disposed below the flow rate setting machine B is the same as the conventional rice milling apparatus shown in FIG. 1 shown in the figure is a milling cylinder made of, for example, a hexagonal cylinder. The milling cylinder 1 is composed of a cerealing section 2 and a milling section 3, and the cerealing section 2 of the milling cylinder 1 has a brown rice from a brown rice storage hopper 5. Is provided with a brown rice supply port 7 for receiving the flow rate through the flow rate setting machine B and the guide cylinder 6, and the pressing plate 9 is pressed against the discharge port 8 by the biasing mechanism 10 at the discharge port 8 of the whitening portion 3. It is provided in the state. The urging mechanism 10 is integrated with the compression plate 9 and movably penetrates a screw shaft 11 fixed to the discharge port 8, and the connection plate 12 is disposed on the discharge port 8 side. A coil spring 13 for moving and biasing, and an adjusting screw 14 screwed into the screw shaft 11 to receive the other end of the coil spring 13 and adjust the biasing force of the coil spring 13. Although the closing biasing force of the compression plate 9 can be adjusted by changing the position of the adjustment screw 14 with respect to the above, other configurations may be used. The grain sending spiral 16 is provided inside the grain sending part 2, and the whitening part 3 is provided with a whitening roll 15 inside, and the outside is covered in a cylindrical shape with a wire strip 4. The whitening roll 15 and the cereal sending spiral 16 are configured to be coaxially rotated by being mounted on a rotating shaft 18 to which power from the drive motor 17 is transmitted via a belt-type transmission mechanism. The belt-type transmission mechanism includes a drive pulley 19 attached to a drive shaft 17A of the drive motor 17 so as to be integrally rotatable, a driven pulley 20 attached to the rotary shaft 18 so as to be integrally rotatable. The power transmission belt 21 is wound around the pulleys 19 and 20, but the power transmission may be performed using a gear mechanism or the like. Further, a koji discharge hopper 22 is provided below the koji fine cylinder 1, and a polished rice discharge cylinder 23 is provided below the discharge port 8. In addition, the rice milling machine main body A is not limited to the illustrated one, and various known rice milling apparatuses can be used.
[0015]
As shown in FIG. 3, the flow rate setting machine B provided between the brown rice supply port 7 of the rice milling machine main body A and the brown rice storage hopper 5 has an inlet 24 communicating with the brown rice storage hopper 5 at the upper portion. The opening area is larger than the inlet 24 for supplying brown rice to the cerealing section 2 via a guide cylinder (which may be omitted) 6 communicating with the cerealing section 2 of the milling cylinder 1 at the bottom. A brown rice container 26 having a small outlet 25 is provided. The inlet 24 is provided with an opening / closing shutter 28 that is opened and closed by an actuator 27 such as a piston cylinder or a solenoid. In FIG. 3, the inlet 24 is provided at the lower end of the brown rice storage hopper 5, but when the brown rice storage hopper 5 and the inlet 24 are connected by a cylinder or the like, the opening / closing shutter 28 is provided. May be provided at any position between the brown rice storage hopper 5 and the inflow port 24. On the other hand, flow rate control means 29 is provided at the outlet 25. The flow rate control unit 29 includes a flow rate control shutter 30 that opens and closes the outlet 25 of the brown rice container 26 and a flow rate control motor 31 that adjusts the opening degree of the flow rate control shutter 30. It is attached to a female screw member 33 that is rotatably mounted on a feed screw 32 that is rotated by a motor 31. When the feed screw 32 is rotated by the rotation of the flow control motor 31, the flow control shutter 30 moves linearly. The outlet 25 can be opened and closed and the opening thereof can be adjusted, and the flow control motor 31 includes a rotary encoder 34 for detecting the opening of the flow control shutter 30. In addition, the brown rice container 26 is provided with a proximity switch as the brown rice storage amount detecting means 35. The proximity switch includes a first sensor 35A disposed in the upper portion and a second sensor 35B disposed in the lower portion. It is made up of. A capacitance type can be used as the proximity switch. This capacitance proximity switch detects the presence or absence of brown rice based on the difference in capacitance between air and brown rice. As shown in FIG. 5, the actuator 27 of the opening / closing shutter 28 and the flow rate control motor 31 of the flow rate control means are supplied from the first sensor 35 </ b> A and the second sensor 35 </ b> B and the rotary encoder 34 constituting the brown rice storage amount detection means 35. Based on the detection information, it is operated by a signal from the control device 36. In the control device 36, the flow rate of brown rice per unit time flowing out from the outlet 25 based on the amount of change in the brown rice storage amount in the brown rice container 26 detected by the first sensor 35 </ b> A and the second sensor 35 </ b> B. A calculation means 37 for calculating is provided. Further, by adjusting the opening degree of the control shutter 30 of the flow rate control means 29 with the flow rate control motor 31 based on the brown rice flow rate calculated by the calculation means 37, the cerealing part of the milling tube 1 flows out from the outlet 25. 2 is provided with a brown rice flow rate adjusting means 38 for adjusting the flow rate of brown rice supplied to 2.
[0016]
Next, the operation of the brown rice flow rate setting device B will be described based on the operation explanatory diagram of FIG. First, when the rice milling apparatus is started, an output signal is output from the control device 36 based on the data for the target flow rate set by manual operation, and the flow control motor 31 of the flow control means 29 is driven by the output signal. Then, the opening position of the flow rate control shutter 30 is adjusted to the opening position that becomes the target flow rate, and the start is awaited (FIG. 4A). The approximate relationship between the opening position of the flow control shutter 30 and the flow rate of the brown rice is known in advance. Next, after the drive motor 17 of the rice milling machine main body A is driven to start the rice milling apparatus, the open / close shutter 28 of the flow rate setting device B is opened by a signal from the control device 36, and the brown rice storage hopper 5 opens the brown rice container 26. Supply brown rice G to A predetermined amount of brown rice G supplied into the brown rice container 26 is supplied to the cerealing unit 2 of the milling mill 1 in a state where the flow rate is controlled by the open flow control shutter 30 and the rice milling operation is started. Since the flow rate of the brown rice to the cereal transmission unit 2 is controlled (the flow rate is limited) by the flow control shutter 30, the interior of the brown rice container 26 is filled with the brown rice after a short time (FIG. 4B). ). When the opening / closing shutter 28 is opened and the set time has elapsed, it is determined that the interior of the brown rice container 26 is filled with brown rice, or the detection means such as a sensor detects that the interior of the brown rice container 26 is filled with brown rice. Then, the actuator 27 is driven by a signal from the control device 36 to close the open / close shutter 28 and stop the supply of the brown rice to the brown rice container 26. Here, the inside of the brown rice container 26 is filled with brown rice, but the supply amount of brown rice may be changed as long as the first sensor 35A can detect the brown rice. Although the supply of brown rice to the brown rice container 26 is stopped, the supply of brown rice is continued from the brown rice container 26 to the cerealing section 2 of the milling tube 1. The amount of brown rice contained in 26 decreases, and eventually the first sensor 35A detects that the brown rice is no longer in that position (FIG. 4C). The signal from the first sensor 35A is sent to the control device 36. Thereafter, the supply of brown rice to the cerealing section 2 of the milling tube 1 is continued, and the second sensor 35B eventually detects that the brown rice at that position is gone (FIG. 4 (d)). The signal from the second sensor 35B is also sent to the control device 36. Thus, when the signals from the first sensor 35A and the second sensor 35B are received, the control device 36 has lost the brown rice at the position of the second sensor 35B from the time when the brown rice at the position of the first sensor 35A has been exhausted. Measure time to time. Volume data of the brown rice container 26 between the first sensor 35A and the second sensor 35B is input to the control device 36 in advance, and the flow rate control shutter 30 is calculated from the detection time difference between the two sensors 35A and 35B. The present cereal flow rate controlled by is calculated. Based on the calculated cereal flow rate, the flow control motor 31 is driven by a signal from the control device 36 to adjust the opening position of the control shutter 30 according to the excess or deficiency with respect to the target flow rate. When the adjustment of the opening position of the control shutter 30 is completed, the actuator 27 is driven by a signal from the control device 36 to open the opening / closing shutter 28 again. From the brown rice storage hopper 5 to the brown rice storage hopper 5 until the brown rice is filled. To the state shown in FIG. Thereafter, by repeating the operations shown in FIGS. 4 (b) to 4 (d) as described above, the flow of brown rice to the cerealing unit 2 of the milling cylinder 1 is set to be equal to or less than the cerealing capacity of the cerealing unit 2. The rice milling operation is continued by controlling to a constant target flow rate.
[0017]
On the other hand, in the rice milling machine main body A, the brown rice supplied from the brown rice storage hopper 5 through the flow rate setting device B as described above is flown by the cerealing pressure by the cerealing spiral 16 of the cerealing unit 2 and the compression plate 9. Whitening is performed by rotation of the whitening roll 15 while maintaining the inside of the whitening portion 3 at a predetermined pressure by the resistance pressure on the outlet 8 side. At the time of milling, as in the case of the conventional rice milling apparatus, brown rice bran that has left the brown rice by milling is discharged out of the milling wire 1 of the milling section 3 of the milling mill 1 and out of the milling mill 1, and the lower mill discharge hopper 22 Through the rice mill. Further, the polished rice is discharged out of the milling cylinder 1 from the discharge port 8 where the compression plate 9 is opened against the urging force of the coil spring 13 due to the internal pressure of the polishing section 3, and the next process is performed from the polished rice discharge cylinder 23. Sent to. At this time, in the present invention, the flow rate of the brown rice supplied from the brown rice storage hopper 5 to the cerealing unit 2 of the milling tub 1 is always controlled by the flow rate setting unit B to a constant flow rate equal to or less than the cerealing capacity of the cerealing unit 2. Therefore, the cereal flow rate does not fluctuate due to uneven quality of brown rice, and stable rice milling work with a constant milling degree is continued. Thus, in this invention, the flow rate of the brown rice supplied to the cerealing part 2 controlled by the flow rate setting machine B is the cerealing capacity of the cerealing part 2, that is, the size and pitch of the cerealing spiral 16. By reducing the cerealing capacity determined by the number of revolutions, etc., and performing rice milling, the cerealing flow rate to the milling unit 3 by the cerealing unit 2 is made constant, thereby reducing the pressure fluctuation inside the milling unit 3. , The degree of whitening can be stabilized. By setting the target flow rate to a value smaller than the cerealing capacity of the cerealing unit, the pressure fluctuation inside the whitening unit 3 can be made smaller than when setting the same target flow rate as the cerealing capacity. it can.
[0018]
In the above embodiment, as the brown rice storage amount detection means 35 in the brown rice container 26 of the flow rate setting device B, one comprising a pair of upper and lower capacitive proximity switches 35A and 35B is used. Although the example which calculates the flow volume of the brown rice supplied to the cereal transmission part 2 based on the volume change of brown rice of rice was shown, as the brown rice accommodation amount detection means 35, for example, a brown cell in the brown rice container 26 using a load cell etc. The flow rate of brown rice supplied to the cerealing unit 2 may be calculated by measuring the weight change of the brown rice. If the change in the amount of brown rice stored in the brown rice container 26 can be detected, the brown rice is stored. Any amount detecting means 35 may be used. Also, when starting the rice milling device, it will automatically start at a slightly lower flow rate (about 90%) than the target flow rate to reduce the load at the start or to prevent excessive flow rate. It can also be a measure.
[0019]
【The invention's effect】
As described above, according to the present invention, the flow rate setting machine automatically adjusts the supply amount of brown rice to the cerealing unit to a constant value below the cerealing capacity of the cerealing unit, thereby Since the cereal flow rate can be stabilized and the pressure fluctuation inside the milled portion can be reduced, it is possible to continue the milling operation with a constant milling degree and a stable milling rate without requiring skill.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view, partially broken away, showing the entire rice milling apparatus provided with a flow rate setting machine for brown rice.
FIG. 2 is an enlarged cross-sectional view of a precision tube.
FIG. 3 is a cross-sectional view of a brown rice flow rate setting machine.
FIG. 4 is an operation explanatory diagram of a brown rice flow rate setting machine.
FIG. 5 is a control block diagram of the present invention.
FIG. 6 is a cross-sectional view of a part of a conventional rice milling apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rice milling tube 2 Grain sending part 3 Whitening part 4 Dehulling wire net 5 Brown rice storage hopper 6 Guide cylinder 7 Brown rice supply port 8 Discharge port 9 Pressing plate 10 Energizing mechanism 11 Screw shaft 12 Connecting plate 13 Coil spring 14 Adjustment screw 15 Whitening roll 16 Grain sending spiral 17 Drive motor 17A Drive shaft 18 Rotating shaft 19 Drive side pulley 20 Driven side pulley 21 Belt 22 Grain discharge hopper 23 Polished rice discharge cylinder 24 Inlet 25 Outlet 26 Brown rice container 27 Actuator 28 Opening / closing shutter 29 Flow rate control means 30 Flow rate control shutter 31 Flow rate control motor 32 Feed screw 33 Female screw member 34 Rotary encoder 35 Brown rice capacity detection means 36 Control device 37 Calculation means 38 Brown rice flow rate adjustment means 39 Flow rate adjustment shirter A Rice mill main body B Flow rate setting machine G Brown rice

Claims (6)

  Brown rice provided between the brown rice storage hopper and the cerealing part of the rice milling apparatus, having an inlet that communicates with the brown rice storage hopper at the upper part and an outlet that communicates with the cerealing part at the lower part A container, an open / close shutter provided between the brown rice storage hopper and the inlet for supplying a predetermined amount of brown rice from the inlet, a flow rate control means provided at the outlet, and the inside of the brown rice container Calculated by the calculation means, the calculation means for calculating the flow rate of brown rice per unit time flowing out from the outlet based on the amount of change in the brown rice storage capacity detected by the brown rice storage capacity detection means, A flow rate setting unit for brown rice in a rice milling apparatus, comprising: a brown rice flow rate control means for adjusting the flow rate of brown rice flowing out from the outlet by the flow rate control means so as to match a target flow rate based on the flow rate of brown rice   The flow rate setting machine for brown rice in a rice milling apparatus according to claim 1, wherein the target flow rate is set to be equal to or less than a cerealing capacity of a cerealing unit of the rice milling apparatus.   The flow rate setting machine for brown rice in a rice milling apparatus according to claim 1, wherein the brown rice capacity detection means is a pair of upper and lower proximity switches provided in the brown rice container.   The flow rate setting machine for brown rice in a rice milling apparatus according to claim 2, wherein the proximity switch is of a capacitance type.   The rice flow control apparatus according to any one of claims 1 to 4, wherein the flow rate control means includes a flow rate control shutter that opens and closes an outlet of the brown rice container and a flow rate control motor that adjusts an opening degree of the flow rate control shutter. Flow rate setting machine for brown rice.   The rice milling apparatus which provides the flow rate setting machine of the brown rice in any one of Claims 1-4 between the brown rice storage hopper and the cereal part.

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