JPS6358623B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a vertical circulation friction rice mill.

Rice milling machines for home use in rural areas have become dualized in Japan, with large rice milling factories concentrated in cities and small rice milling machines distributed in depopulated rural areas. There is an urgent need to rationalize it. Although rice producers should not regularly use low-grade rice produced under conditions worse than those used in urban life, two types of rice milling methods have been adopted in the past.
Tane is a horizontal friction milling machine that completes the milling of brown rice and turns it into white rice by simply passing through the same milling chamber once.With this method, the bran is almost completely removed, and even if it is inferior to urban rice milling, it has a higher quality. Although there is no difference, the other 1
Seeds are processed using a horizontal circulation friction rice mill (see Figure 5), where a rice tank is placed above the milling chamber, and when the rice is pushed up from the milling chamber into this tank and circulated, the reaction of the pushing up is used as resistance by the milling chamber. Therefore, it has become a traditional fatal flaw that bran removal polishing cannot avoid extremely incomplete defects, and even in the vertical circulation friction rice mill (see Figure 6), bran removal polishing is not possible. It has the same defects as above.

The reason why we choose this rice milling machine with poor polished rice quality is that even if the main parts of the milling chamber are worn out and efficiency and other performance decreases,
The process is circular, so if you leave it until it becomes white rice, it will eventually become white.
In addition, since the amount of rice milled is small, there is no need to rush the rice milling process, and this model is evaluated on the premise that there are no constraints on the rice milling time, so it is an effective rice milling method under such special circumstances. The fact that the rice cannot be absorbed is a source of great sadness. Furthermore, since the rice is circulated through a deformed tank, there is a tendency for circulation irregularities to occur.The gist of the present invention is to eliminate these defects and improve the ability to self-sufficiently produce high-quality white rice.

Therefore, we installed a container or tank that was formed concentrically around a milling tube with a circulation process upright, and rice was supplied from around the bottom of the milling tube near the bottom wall and was discharged uniformly throughout the tank. Since the rice is circulated through the tank, unevenness can be prevented and uniformly polished rice can be processed. In addition, the rice bran generated in the milling room is absorbed and removed through the perforated wall of the milling tube and the inside of the outer cylinder by the ventilation impeller located at the bottom, and beautiful polished rice is processed by the frictional force of the milling room, which has no residual bran.

The reason why the conventional vertical circulation rice milling machine was not successfully put into practical use was that the rice bran removal was incomplete. In all of these, the polishing cylinder inside the tank does not have a bran removal wall, and the water flows down a wire mesh surface that is tilted over the tank.
Unless rice grains have a special agitation structure, simply forcing them onto a screen and letting it flow down will have no effect on removing the bran, resulting in failure.

In the present invention, the porous wall for removing rice bran is separated from the rice grain layer of the tank by the mantle, and the rice grains are sucked out from the porous wall into the mantle by stirring action, frictional force, and centrifugal force that the rice grains receive from the trochanter. The rice grains are fully wiped of the adhering bran to produce high-quality polished rice, and the bran discharged into the mantle is discharged from the standing bran removal pipe through the blades to the outside of the machine by suction, removing white spots. The beautiful white rice that has been polished without any bran is produced through simple vertical circulation, which has a great effect.

In addition, generally, the bran removal pipe in the tank becomes a branch-like obstacle and prevents the uniform flow of rice grains, but in the present invention, it doubles as the rice grain supply port of the polishing barrel and the connecting support between the polishing barrel, so it is sturdy and can be easily maintained inside the tank. A major effect of the present invention is that it not only does not obstruct the circulation of rice grains, but also serves as a supply port for the milling room to direct and rectify the inflow of rice grains, and can be simplified into a balanced and symmetrical structure.

The present invention will be explained with reference to embodiment figures. A vertical shaft 4 has a friction type milling trochanter 2 and a spiral feeding grain trochanter 3 mounted vertically in the center of the outer peripheral container 1 having a mortar-shaped cross section.
At the same time, the shaft end of the vertical shaft 4 is connected to the main shaft of an electric motor 5 so as to rotate, and the outer periphery of the polishing trochanter 2 is surrounded by a polishing tube 6 whose bran removal portion has a porous wall. A mantle 8 is provided on the outer periphery of the polishing cylinder 6 via a spacer to form a rice bran removal chamber 9. A rice bran removing pipe 10 formed by connecting the lower part of the rice bran 6 with the dividing portion of the rice bran 6 is connected to a case 12 of a blade wheel 11 mounted on the vertical shaft 4, and the grain feed rotor is attached to the upper part of the case 12. 3 forms the upper surface of the bottom wall 13 near the lower part, and the periphery of the bottom wall 13 is connected to and integrally formed with the outer peripheral container 1; 14 is a resistance lid provided at the upper discharge port of the polishing cylinder 6; (See FIG. 4) The resistance lid 14 is supported by an adjusting screw shaft 40 and an elastic spring 41 provided at the end of the horizontal supporting rod 39 projecting from the upper edge of the outer container 1. , is formed so that its pressing force can be adjusted. Reference numeral 15 indicates a base housing an electric motor therein, reference numeral 16 indicates a rice grain inlet of the outer container 1, and reference numeral 17 indicates an outlet of a case containing a blade wheel.

Since the configuration is as described above, the raw brown rice is placed in the outer container 1.
When the apparatus is started, the spiral feeding grain trochanter 3 and the milling trochanter 2 are rotated by the vertical shaft, and the brown rice in the container 1 flows into the milling chamber 6 from the lower end side of the milling cylinder 6. The rice bran powder generated by the whitening action flows into the rice bran removal chamber 9 by the air supply action by the rotation of the impeller 11 in the case 12, and the rice bran removal air flows through the rice bran removal pipe 10. ...and is discharged from the aircraft through the air exhaust port 17 of the case 12 via the impeller 11. The polished rice in the polishing chamber 7 flows into the container 1 through the gap between the polishing chamber 7 and the resistor lid 14, and the polished rice is passed through the circulation process several times, polished to a predetermined degree of polishing, and sent to the next process.

According to the second aspect of the present invention, a portion of the vertical shaft 4 opposing the whitening tube 6 is formed into a hollow tube 18, and an upper part of the vertical shaft 4 is opened to form an air intake port 19. The hollow part 21 communicating with the ventilation hole 20 opened in the main part of the outer periphery of the refined trochanter 2 is connected to the hollow pipe 18.
Since the fresh air flowing in from the air intake port 19 flows out from the ventilation hole 20 of the milling trochanter 2, the fresh air is uniformly distributed over the entire length of the milling chamber 7. This has the effect of ensuring that the bran powder generated during milling flows out in a jet and is reliably discharged into the bran removal chamber 9 through the porous wall, thereby ensuring high quality polished rice without adhering bran at all times.

Claim 3 provides the bran removal pipe 1.
0 is a connecting post 24 between the bottom wall 13 forming the base of the rice milling machine and the support frame 23 of the polishing cylinder 6, and the rice grain supply port 25 of the polishing chamber 7 is connected to the rice grain supply port 25 by the connecting post 24.
As a result, the upper polishing tube 6 and the outer mantle 8 can be stably fixed together by the connecting support 24, and the flow of the rice grain removal air and rice grains can be smoothed, and the vibration of the device can be reduced. It has the effect of being able to prevent damage to a small extent.

Figure 3 shows a known example of a horizontal circulation friction rice polishing machine.
The rice grains in the tank 26 flow into the milling chamber 29 from the inflow path 28 by the rotation of the rolls 27 and are milled.
The generated rice bran falls from the porous wall 30 into the rice bran removing chamber 31, and the polished rice is returned to the tank 26 from the outflow path 32 and is circulated several times to be milled into polished rice with a predetermined polishing degree.

FIG. 4 shows a known example of a vertical circulation friction rice milling machine, in which rice grains in a grain tank 33 flow into a vertical milling chamber 35 by rotation of a vertical spiral rotor 34 and are milled. The white rice flowing out flows down the sloped porous wall 37 of the rice bran removal chamber 36, falls into the tank while having its rice bran removed, and is circulated through the device several times to be milled into white rice with a predetermined polishing degree. Ru. 38 is a bran collecting tank in the bran removal room.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Fig. 1 is a side sectional view of this device, Fig. 2 is a sectional view of main parts of another embodiment, Fig. 3 is a plan sectional view of the outer container taken along line A-A, and Fig. 4 is a perspective view of the resistance lid. , Figures 5 and 6
Both figures are side sectional views of known examples. 1... External container, 2... Refining trochanter, 3... Spiral feeding grain trochanter, 4... Vertical shaft, 5... Electric motor, 6... Refining tube, 7... Refining room, 8... Outer mantle, 9...Blank removal chamber, 10...Blank removal pipe, 11...Blade wheel, 12...Case, 13...Bottom wall, 14...Resistance lid, 15...
Base, 16...Rice grain input port, 17...Exhaust port, 1
8...Hollow tube, 19...Air intake port, 20...Ventilation port, 21...Hollow part, 22...Ventilation hole, 23...
Support frame, 24...Connection support, 25...Rice grain supply port,
26...Tank, 27...Roll, 28...Inflow channel, 29...Refining chamber, 30...Porous wall, 31...
Bran removal room, 32... outflow channel, 33... grain tank,
34... Vertical spiral trochanter, 35... Semen chamber, 36...
...Blank removal chamber, 37...Slanted porous wall, 38...Blank collecting tank, 39...Horizontal support rod, 40...Adjustment screw shaft, 41...Elastic spring.

Claims (1)

[Scope of Claims] 1. A friction type milling trochanter and a spiral feeding grain trochanter are mounted vertically on a vertical shaft, and the outer periphery of the milling trochanter is covered by a milling cylinder whose bran removal portion has a porous wall. A rice polishing chamber is formed by enclosing the polishing chamber, a mantle is provided on the outer periphery of the polishing cylinder through a gap, and a bran removing part is formed by connecting a lower branching part of the mantle and a lower branching part of the polishing cylinder. The pipe is connected to a case of a blade wheel mounted on the vertical shaft, and the upper part of the case forms an upper surface of a bottom wall near the lower part of the grain feeding rotor, and the outer periphery of the milling chamber is formed around the bottom wall. A vertical circulation friction rice polishing machine characterized by being connected and integrated with a container. 2. The part of the vertical shaft facing the polishing cylinder is made into a hollow tube, and the upper part of the vertical shaft is opened to serve as an air intake port, and communicates with a ventilation hole opened in a main part of the outer periphery of the polishing trochanter. The vertical circulation friction rice polishing machine according to claim 1, wherein the hollow portion is communicated with a ventilation hole opened around the hollow tube. 3. The rice grain removing pipe is used as a connecting support between the bottom wall, the polishing cylinder, and the supporting frame, which constitute the base of the rice milling machine, and the rice grain supply port of the rice polishing room is formed by the connecting support. A vertical circulation friction rice milling machine according to claim 1.