JPS6361065B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a bran removal device for a circulating rice mill.

Rice milling machines for home use in rural areas have become dualized, with the rice milling structure in Japan becoming dualized between large concentrated rice milling factories in cities and small rice milling machines in depopulated rural areas. It is necessary to rationalize it.

Traditionally, two types of rice milling methods were used for this household use.
One type of rice milling machine, as shown in Figure 1, is a horizontal rice milling machine that uses a jet blast to remove rice bran, which completes the milling process and turns brown rice into white rice by simply passing through the same milling chamber once. When the polishing part is worn out, the problem is that the rice cannot be polished in one pass. The other type of rice, as shown in Figure 2, forms part of the circulation process in which the milling room connects to the tank, and the rice passes through the same milling room many times to continuously mill the rice until it reaches a predetermined whiteness. Even if the whitening part of the machine is worn out and the efficiency decreases, there is no limit to the time it takes to polish the rice, so if you leave it until the desired level of whiteness is achieved, it is convenient and easy to achieve your goal. However, in this case, the sticky rice grains attached to the rice grains cannot be removed because the rice grains flow continuously in a circular manner during the circulation process and the structure lacks the ventilation effect of the milling room. , dirty and filthy white rice with no shelf life is constantly being used. Although it is a small-scale and easy-to-handle operation, it is a simple circulation type, but the defect of insufficient bran removal is fatal.

Next, even with a vertical type circulating rice mill, the defects due to incomplete bran removal are larger than those with a horizontal type, and almost no bran removal effect can be expected, so there are no examples of successful implementation.

Figure 3 shows an example of this. Rice grains being sent upward through the milling section are discharged in a scattered stream around the circumference and flow down the sloped surface of a conical wire mesh while lightly floating, so that the bran adhering to the rice grains is removed. Most of the bran cannot be removed, and the free bran that falls under the screen is difficult to remove from the tank, so there is no value in removing the bran at all, so all methods end in failure.

The present invention provides a circulation tank container equipped with a milling chamber with a horizontal shaft mounted therein and a milling chamber containing a spiral trochanter for milling, and a porous wall bran removal section is provided on the bottom wall of the milling chamber, and the spiral trochanter is installed in the correct position. After rotating, the rice grains in the container flow from the rice feeding path through the polishing chamber to the rice discharging path, and are polished while circulating in the forward direction, and then the spiral trochanter is reversely rotated for an arbitrary predetermined period of time to remove the rice grains. By circulating the rice grains in the opposite direction, the rice grains in the tank container during milling are pushed up from the open rice feeding path by the rice milling spiral rotor that rotates in the opposite direction, and are pushed up into the upper layer of the container whose diameter has been expanded. The rice grain layer inside the container floats almost entirely due to the upward force, and the rice grains flowing upstream roll in a diffused manner, turning around in the upper layer and flowing down along the peripheral wall of the container to form rice grains. A part of it flows into the rice feeding path, and most of it flows backward through the inclined plate and upstream into the center of the container, so that the grain density of the rice grain layer is extremely spread out and becomes thinner, and each rice grain becomes thinner. The rotation and rotation actions are promoted, and the rice grain surface is polished by the stirring action of the rice grains, and the adhering bran is peeled off from the rice grain surface and shaken off to form free bran, and the rice grain layer containing the free bran is removed from the rice feeding path. It flows into the polishing chamber and flows through the porous wall bran removal part in a rubbing manner to remove only the free bran from the porous wall to the outside of the machine to perform high efficiency bran removal polishing, which is different from the conventional circulating rice mill. The purpose of the present invention is to develop and provide a new device and method that fully utilizes the bran removal and abrasive action that was lacking in rice milling and makes it possible to mill beautiful polished rice.

Embodiments of the present invention will be explained with reference to FIGS. 4 and 5. The bottom of the milling chamber 3 of a circulation tank container 4 equipped with a milling chamber 3 containing a spiral rotor 2 for milling mounted on a horizontal shaft 1. It consists of a blade wheel 8 in which a porous wall bran removing part 5 is provided on the wall, and a bran collecting cylinder 6 provided at the lower part of the bran removing part 5 is mounted on the main shaft of an electric motor 7 for forward and reverse rotation connected to the horizontal shaft 1. This is a horizontal circulating rice mill connected to an exhaust fan 9 and a pulley 10 mounted on a horizontal shaft 1 and a pulley 11 mounted on the main shaft of an electric motor 7.
is a rice discharging channel 13 with a resistor lid 12 on one side.
and a rice feeding route 15 provided with a flow rate adjustment shutter 14 on the other side.
3 and 15 are connected by a curved inclined plate 16. Reference numeral 17 indicates a rice discharge port with an on-off valve 18 provided on the bottom wall of the container 4, 19 indicates a base, and 20 indicates an operation box housing a control circuit 21. Note that the spiral rotor 2 for rice milling is limited to the drawing. Instead, a spiral rotor with a stirring rotor etc. attached to a part of the shaft is used.

Next, the control circuit 21 shown in FIG. 7 will be explained. The power terminals R, S, and T are provided with a contact CM1 of a magnetic contactor and an overcurrent relay OCR between the forward and reverse rotation electric motor 9, and a contact CM1 of the magnetic contactor is connected to a contact M2. A reversible circuit is provided. In addition, between the power terminals R and T, contacts of a start switch PB1, a stop switch PB2, a timer TM3, and an electromagnetic coil of a relay R1 are connected in series, and a self-maintenance consisting of a contact of a relay R1 is connected to the switch PB1. Set up a circuit,
Further, the electromagnetic coil of relay R2 and timer TM1 are connected in parallel to the contacts of relay R3, and connected between the busbars of power terminals R and T, and the contacts of timer TM1 are connected to relay R4, and the timer TM1 is connected to the contacts of relay R4.
2. The electromagnetic coil of relay R3 is connected in parallel between both buses R and T, and the timer
A self-holding circuit consisting of the contacts of relay R2 is provided at the contacts of TM1, and the electromagnetic coils of timer TM2 and relay R4 are connected in parallel to the contacts of timer TM2, and the contacts of the timer TM
2 is provided with a self-holding circuit for relay contact R4, and the contacts of relay R2 and relay R4 are connected in parallel, and the contacts of electromagnetic contactor MC2, electromagnetic contactor MC1, and overcurrent relay OCR are provided in the extension part. are connected in series, and the contacts of the electromagnetic contactor MC1 and the electromagnetic contactor MC2 are connected in series to the contacts of the relay R3, and the overcurrent relay OCR is interposed in the extension thereof, and both buses R, Connect between T,
The bus R is provided with a contact for a relay R1 that closes and energizes when the starting switch PB1 is turned on.

Since we have the above configuration, we need a timer TM for startup.
1 is the startup time of the prime mover (e.g. 5 seconds), and timer TM2 is the timer for pumping (e.g. 40 minutes).
In addition, the polishing time for bran removal (for example, 5 minutes) is set on the timer TM3 for bran removal, raw brown rice is put into the tank container 4, and the shutter 14 for adjusting the flow rate of the rice feeding path 15 is opened. Control circuit 21
When starting switch PB1 is turned on, relay R
The electromagnetic coil of relay R2 is excited and closes contact R1, the starting timer TM1 is activated, and the electromagnetic coil of relay R2 is excited and closes contact R2.
When the contact R2 is closed, the contact MC1 of the electromagnetic contactor is closed, and the electric motor 7 is rotated in the reverse direction to send the rice grains upstream to the rice feeding path 15 of the container 4, reducing the load and starting easily. When 5 seconds have elapsed, the timer TM1 stops, and the timer TM2 for polishing is activated, and at the same time as this switching, the contacts of the magnetic contactor M1 are opened, and the contacts of the magnetic contactor M2 are closed. The electric motor 7 will rotate in the forward direction. Therefore, the flow rate adjustment shutter 14 is operated to adjust the opening to an appropriate level. In the polishing chamber 28, the whitening spiral rotor 2 mounted on the horizontal shaft 1 in the tank container 4 rotates in the forward direction by the forward rotation of the electric motor 7, and the rice grains in the container 4 flow down the rice feeding path 15. At the same time, it flows into the whitening room 3,
The resistance lid 1 is stirred by the rotation of the spiral rotor.
The rice is pushed out to the rice discharge path 13 where there is a rice discharge path 2. Due to the contact friction force between the rice grains generated by this pressing force, the bran layer on the surface of the grains is separated and polished, and the rice grains move upstream and move inside the container 4 several times along the closed dot-dotted curve shown in the figure. The rice bran is circulated and milled to an arbitrary predetermined degree of polishing, and some of the rice bran powder is collected by the exhaust fan 9 in the porous wall rice bran removal section 5. Next, when the polishing time reaches 40 minutes, the timer TM2 is stopped, and the timer TM3 for bran removal is activated.At the same time as this switching, the contacts of the electromagnetic contactor M2 are opened, and the electromagnetic contactor The contact M3 is opened and the electric motor 7 rotates in the reverse direction. Then, when the adjustment shutter 14 is operated to open the rice grains in the tank container 4, the rice grains in the tank container 4 are rotated in the opposite direction by the reverse rotation of the electric motor 7, and the rice grains are transferred to the open rice feed path 1 by the reverse rotation of the rice polishing spiral rotor 2.
5 is pushed up and flows out to the upper part of the container 4 whose diameter has been enlarged, and due to the pushing force, the rice grain layer inside the container 4 is almost entirely floated, and the rice grains flowing upstream are rolled in a diffused manner. The rice grains flow down to the side of the rice discharging path 13 along the peripheral wall, and the grain density of the rice grain layer becomes extremely evacuated, and the revolution and rotation of each rice grain is promoted. As a result, the adhering bran on the surface of the rice grains is peeled off and becomes free bran, and the rice grains mixed with the free bran flow into the milling chamber 3 from the rice ejecting path 13 along the peripheral wall, and the bran removing part 5 of the porous wall is rubbed. Only the free bran flowing through the porous wall is absorbed by the exhaust fan 11, and is circulated and polished to perform a high-efficiency bran removal polishing action, and the bran removal polishing time is 5 minutes. When the process is finished, the electric motor 7 is stopped together with the timer TM3, and the polished rice in the container 4 is taken out from the rice discharge port 17 and left for the next process.

As described above, the horizontal circulation rice milling method and apparatus of the present invention includes a porous wall rice removal portion in the bottom wall of the milling chamber of a circulation tank container equipped with a milling chamber incorporating a spiral rotor for milling mounted on the horizontal axis. is provided, and the spiral trochanter is rotated in the forward direction to mill the rice grains in the container as they flow from the rice supply path through the milling chamber to the rice discharge path and circulate in the forward direction, and then the spiral trochanter is rotated in the forward direction. Since the rice grains are circulated in the opposite direction by rotating in the opposite direction for an arbitrary predetermined period of time, the grain density of the rice grain layer in the container is extremely spread out and diluted by the upward force caused by the reverse rotation of the spiral rotor, and each rice grain is The rice grain surface is polished by the stirring action of the rice grain, and the adhering bran is peeled off from the rice grain surface and shaken off to form free bran, and the rice grain layer mixed with the free bran is transferred to the porous Since the bran flows in a rubbing manner in the wall bran removal section and removes only the free bran from the porous wall to the outside of the wall, a high-efficiency bran removal polishing action can be carried out simply and easily, and it can be used in conventional circulating rice mills. It has the remarkable effect of fully demonstrating the lacking bran removal and polishing action and ensuring beautiful polished rice.

Further, FIG. 6 illustrates a case where the horizontal shaft 1 is connected to a mechanically configured reversible rotation transmission device 22,
The horizontal shaft 1 is connected to a reversible rotation mechanism 23 consisting of a plurality of gears, and an automatic operating rod 24 is operated to switch the horizontal shaft 1 to rotate the horizontal shaft 1 forward or backward.

Claim 3 provides that the horizontal axis is
Since it is configured to automatically rotate in reverse for a predetermined period of time based on the signal from a timer installed in the control circuit, it is possible to automate the switching operation between whitening action by forward rotation and bran removal polishing action by reverse rotation. This has the effect of simplifying work management.

According to the fourth aspect of the present invention, since the electric motor is configured to start by rotating in reverse for an arbitrary period of time, it is possible to prevent rice grains from sticking at the time of starting, and
It has the advantage of being able to be started with a low horsepower electric motor.

Next, the conventionally known rice milling machine mentioned above will be explained. In FIG. 1, a rotating horizontal shaft 27 with a whitening trochanter 26 mounted thereon is inserted into a perforated whitening cylinder 25, and a whitening chamber 28 is formed around the rotating shaft 27. A rice feed port 30 connected to the circulation tank 29 is provided, and a rice discharge port 31 with a pressure lid is provided on the other side, and the principle is a blast rice bran removal method in which brown rice passes through the milling chamber 28 once to be milled. This is a horizontal rice milling machine.

FIG. 2 shows that the rice grains in the circulation tank 32 flow into the milling chamber 36 from the inlet passage 35 by the rotation of the horizontal shaft 34 on which the milling trochanter 33 which also serves as a spiral is attached, and are milled. The rice bran powder falls into the bran removal chamber 38 from the porous wall 37, and the milled white rice is poured into the resistance lid 39.
This is a horizontal circulating rice milling machine in which the rice is returned to the tank 32 from an outflow path and circulated within the machine.

FIG. 3 shows that rice grains in a circulation tank 40 flow into a horizontal milling chamber 42 and are milled by the rotation of a horizontal spiral rotor 41 that also serves as an upward spiral.
The polished rice flowing upstream from the slanted porous wall 4 of the bran removal chamber 43
This is a horizontal circulation rice milling machine in which rice flows down four sides in a floating manner and drops into a tank 40 while the rice bran is removed.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Fig. 1 shows a known example of a horizontal rice milling machine with a blast blast and bran removal type, Fig. 2 shows a known example of a horizontal circulating rice milling machine, Fig. 3 shows a known example of a horizontal circulating rice milling machine, and Fig. 4 shows horizontal circulation according to the present invention. FIG. 5 is a plan view of a part of the rice milling machine taken along the line A--A, FIG. 6 is a side sectional view of another embodiment, and FIG. 7 is a control circuit diagram of the apparatus. 1... horizontal axis, 2... spiral trochanter for milling, 3... milling chamber, 4... tank container, 5... porous wall bran removal section,
6... Bran collector tube, 7... Electric motor for forward and reverse rotation, 8...
Impeller, 9...Exhaust fan, 10...Pulley, 11...Pulley, 12...Resistance cover, 13...Rice discharge path, 14...
Flow rate adjustment shutter, 15...Rice feeding route, 16...
... Inclined plate, 17 ... Rice discharge port, 18 ... Opening/closing valve, 1
9...Base, 20...Operation box, 21...Control circuit, 22...Reversible rotation transmission, 23...Reversible rotation mechanism, 24...Automatic operation rod, 25...Porous wall polishing tube, 26... ... Refining trochanter, 27 ... Rotating horizontal axis, 28 ... Refining room, 29 ... One-pass tank, 30 ... Rice feed port, 31 ... Rice discharge port, 32 ...
Circulation tank, 33... Refined trochanter, 34... Horizontal axis,
35... Inflow channel, 36... Refining chamber, 37... Porous wall, 38... Bran removal chamber, 39... Resistance lid, 40...
Circulation tank, 41...Horizontal spiral trochanter, 42...
Horizontal whitening room, 43...bran removal room, 44...slanted porous wall.

Claims (1)

[Scope of Claims] 1. A circulating tank container equipped with a milling chamber containing a spiral trochanter for milling mounted on a horizontal shaft, a porous wall bran removal part is provided on the bottom wall of the milling chamber, and the spiral trochanter is mounted on a horizontal axis. The rice grains in the container flow from the rice feeding path to the rice discharging path through the milling chamber and are milled while being circulated in the forward direction by rotating in the forward direction, and then the spiral rotor is rotated in the reverse direction for an arbitrary predetermined period of time. A horizontal circulation rice milling method characterized in that the rice grains are removed from the rice grains in the porous wall and polished while circulating in the opposite direction. 2. A circulation tank container equipped with a milling chamber containing a spiral rotor for milling mounted on the horizontal axis, a porous wall rice bran removal section is provided on the bottom wall of the milling chamber, and the rice grains in the container are removed from the rice feeding path. The rice grains flow into the rice discharging channel through the milling chamber and circulate in the forward direction to perform the milling action, and after milling, the spiral trochanter is rotated in the reverse direction for an arbitrary predetermined period of time to circulate the rice grains in the reverse direction. A horizontal circulation rice milling device, characterized in that a forward and reverse rotation electric motor or a reversible rotation transmission device is provided on the horizontal shaft to perform bran removal and polishing operations in the porous wall bran removal section. 3. The horizontal circulation rice milling apparatus according to claim 2, wherein the horizontal axis is configured to automatically rotate in reverse at any predetermined time based on a signal from a timer provided in a control circuit. 4. The horizontal circulation rice milling apparatus according to claim 2 or 3, wherein the electric motor is configured to start by rotating in reverse for an arbitrary period of time.