JPH09299816A - Apparatus for polished rice post-treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and efficiently remove skin rice-bran adhering to rice grains after polishing rice by providing a cooling cylinder, stirring bodies installed in the inside in freely rotatable way, and a large number of cooling rod bodies arranged in the circular circumferential line of the wall face of a cooling cylinder at slight gaps and cooling respective cooling rod bodies with a low temperature fluid. SOLUTION: Polished rice supplied to a grain supply aperture 16 of a rice polisher enters a grain sending cylinder 15 and sent toward a cooling cylinder 1 by pressure sending action of a grain sending body 12. The polished rice is stirred by rotation of stirring bodies 10 in the cooling cylinder 1 and at the same time skin rice bran adheres to the dew drop parts produced on the wall faces of pipes 21 by cooled air sent to a large number of pipes 21 constituting the cooling cylinder 1. Since the pipes 2 are automatically rotated interlockingly with the stirring movement of the rice grain, all of skin rice bran are removed completely from the surfaces of the rice grains at the time when the rice grains reach the rear end part of the cooling cylinder 1 and skin rice bran transferred and adhering to a pipe 2 stays for a while on the surface and is parted and dropped by being scrubbed by that on a neighboring pipe 2 and discharged to the outside of the cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice-polishing post-treatment device which is disposed in a rear process of a rice-polishing machine to remove the bran adhering to the surface of rice after the rice-polishing treatment and to cool the rice temperature.

[0002]

2. Description of the Related Art Rice milling machines currently in general use
Even with the blast-friction rice mill with the best bran removal performance, the bran on the surface of rice grain cannot be removed. This bran is generally called Hada-nuka, and it always adheres to rice after pearling. And since this skin bran has a strong adhesive force and cannot be easily removed, conventionally,
It is removed by sharpening and washing before cooking rice, and no efficient removal device for this skin bran has been proposed.

[0003]

The polished rice discharged from the rice polishing machine in this manner still has many skin bran on its surface. For this reason, there occurs a phenomenon that the skin bran peels from the rice and adheres to and accumulates at various places of machines such as a weighing machine and a packaging machine installed in a rear process of the rice milling machine, or at various places of the conveying path. Moreover, when the amount of adhesion of this bran increases, it becomes a lump and peels off, becoming so-called bran balls and mixed in the rice grains. However, this Nukadama is extremely troublesome, and if it is mixed in the product white rice, consumers will complain, which will reduce the product value and cause malfunctions due to clogging in various devices. .

Further, since the polishing operation in a rice polishing machine is a method of peeling the bran off by friction between grains, an increase in rice temperature during rice polishing is unavoidable. Moreover, in the rice mill, rice that has just been milled is stored in a tank or stored in a bag. You will spend a long time as it is. Generally, it is said that the rise in rice temperature is a great enemy of the taste of rice, but in fact, a transient rise in temperature has almost no adverse effect, and it can be left in a high temperature state for a long time. This leads to a loss of taste. However, when the high temperature rice grains are cooled with air, cracks occur on the surface of the rice grains and the taste becomes worse.

In view of the above points, the present invention does not provide a rice-polishing post-treatment device capable of easily and efficiently removing skin bran adhered to rice grains after rice polishing and at the same time preventing the deterioration of the taste by cooling the rice temperature. It is what

[0006]

The technical means of the rice-polishing post-treatment device of the present invention comprises a cooling cylinder and an agitator rotatably provided inside the cooling cylinder, and the wall surface of the cooling cylinder is a circle. It is composed of a large number of cooling rods arranged at a slight interval on the circumference, and the cooling rods are rotatably supported and are cooled by a fluid having a temperature lower than the rice temperature. Especially.

A circular pipe is used as the cooling rod,
You may make it flow a cryogenic fluid inside.

Further, it is also possible to let low temperature air flow on the outer surface of the cooling rod body.

Further, it is preferable that the space between the cooling rods is about 1 mm, and further, the air may be blown from the wall surface of the stirring body.

[0010]

In the rice-polishing post-treatment device of the present invention, polished rice is fed into the cooling cylinder through the rice-polishing machine. The stirrer rotates in the cooling cylinder to stir the milled rice filled in the cooling cylinder. Since the cooling rod body is cooled by a low temperature fluid such as outside air or water whose temperature is lower than the rice temperature, dew condensation occurs on the wall surface of the cooling rod body.
Then, the skin bran adhering to the surface of the polished rice is transferred and adhered (transferred) to the dew condensation point.

Since each cooling rod is rotatably supported, it is rotated by itself as the rice in the cylinder is stirred. Then, the rice under stirring comes into contact with the cooling rods one after another, and the rice bran comes to be transferred to the surface of the rod. The rice in the cooling cylinder is gradually sent to the outlet at the rear end, but during this time, all the bran bran that had adhered to the outer surface of the rice grain was transferred to the stick,
When it comes out from the outlet, there is no bran on the surface of the rice grain, and it is finished as a very beautiful polished white rice.

When the bran that has been transferred to the cooling rod is accumulated to some extent, it rubs against that of the adjacent rod, peels off by itself, and is removed outside the cooling cylinder. Further, although the rice has a high temperature immediately after coming out of the rice polishing machine, heat is taken from the rice by contact with the cooling rod body, and the rice temperature is rapidly lowered.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rice-polishing post-treatment device of the present invention will be described with reference to the drawings. Reference numeral 1 is a cooling cylinder, the side wall of which is composed of a large number of cooling rods.
In the embodiment, a hollow cooling pipe 2 having a circular cross section is used. That is, as shown in FIG. 2, the pipes 2 are arranged at intervals of about 1 mm on the circumferential line,
A low temperature fluid such as air (outside air or cold air) or water is passed through the pipe 2.

Both ends of each pipe are supported by a supporting member 4 so as to be rotatable about its axis and freely ventilated. The details are shown in FIG. Reference numeral 5 denotes an array support plate, which is made of a material having a low friction coefficient such as polytetrafluoroethylene (trade name, Teflon), and fits and supports the end portion of the pipe 2 rotatably and rotatably. A pressing plate 6 prevents the pipe 2 from slipping out. The holding plate 6 is provided with a vent hole 7 so that air can freely flow into the pipe 2.

In the embodiment, as shown in FIG. 3, the vent hole 7 of the holding plate 6 on one side (right side in the drawing) is open to the outside air, and the holding plate 6 on the other side (left side in the drawing) is open. A ring-shaped ventilation chamber 8 is provided on the back surface so that the air can be forcedly exhausted from the exhaust port 9 by the intake device 20.

A stirrer 10 is rotatably provided inside the cooling cylinder 1. The stirrer 10 has several projections 11 on its outer surface. It is also possible to make this agitator 10 hollow for ventilation and to make it a jet type by providing holes in the wall surface.

In FIG. 1, reference numeral 12 denotes a grain-feeding body having a spiral projection, which is continuously provided integrally with the stirring body 10. Further, 13 is a bearing, and 14 is a drive pulley, to which rotational force from a motor or the like is applied. A grain supply port 16 is provided on the wall surface of the grain transfer cylinder 15, and a compression plate 18 is provided on the grain removal port 17 at the rear end of the cooling cylinder 1.

When a rotational force is applied to the pulley 14 in the above apparatus, the grain feeder 12 and the agitator 10 rotate together. Milled rice discharged from a rice polishing machine (not shown) is supplied to the grain feeder 16. This polished rice is in a mortar 1
After entering the inside of the container 5, it is subjected to a pressure-feeding action by the rotation of the grain feeder 12, and is fed to the cooling cylinder 1.

The polished rice in the cooling tube 1 is subjected to a stirring action under a constant pressure by the rotation of the stirring body 10. Also,
Cool air (outside air) is sent to the pipe 2 on the wall surface of the cooling cylinder 1. Since the rice temperature of milled rice that has passed through the rice milling machine is rising,
The inside of the cooling cylinder 1 becomes hot, while the pipe 2 is cold because it is cooled. As a result, the pipe 21
Condensation occurs on the wall surface of. Then, the skin bran moves from the rice grain surface and adheres (transfers) to the dew condensation portion.

Since the skin bran is inherently sticky and has a property of easily adhering to a place having water, the skin bran is extremely well transferred to the wall surface of the dew condensation pipe 2. The rice grains in the cooling cylinder 1 are violently moved by agitation, and the pipe 2 is driven to rotate by the agitation movement of the rice grains. Therefore, from the surface of the rice grains that comes into contact with the pipe, Skin bran comes off one after another and begins to transfer to the pipe surface.
Then, when it reaches the rear end of the cooling cylinder 1, the skin bran is completely removed from the surface of all the rice grains.

When the skin bran transferred to the pipe 2 is accumulated to some extent, it is rubbed against the adjacent pipe to be peeled off and removed outside the cylinder. Because the pipes 2 are driven to rotate by stirring, all the pipes 2 rotate in the same direction and move in opposite directions at the approaching part between adjacent pipes, so the bran transferred to the pipes rubs against each other and is efficient. It comes off well. If the stirrer 10 blows air, the bran can be removed more efficiently from the outside of the cylinder.

Although the temperature of the polished rice immediately after being discharged from the rice polishing machine is high, heat is taken away by contact with the dew condensation point and the rice temperature is rapidly lowered. If rice is left in a high temperature state for a long time, there is a problem that the eating quality deteriorates,
By this cooling, the rice temperature after rice polishing can be efficiently lowered, and the deterioration of the eating quality can be prevented.

A second embodiment is shown in FIG. In this embodiment, the cooling rod body forming the wall surface of the cooling cylinder 1 is a solid cooling round rod 30. Further, the outer surface of the cooling cylinder 1 is surrounded by an outer cover 31, air or cold air whose temperature is lower than the rice temperature is supplied from an air supply port 32, and a blower 34 is connected to an exhaust port 33 so that the inside of the outer cover 31 is closed. It is designed to forcibly suck and exhaust air. Therefore, low-temperature air constantly flows outside the round bar 30, the round bar 30 is cooled, and dew condensation occurs on the surface thereof, and the skin bran is transferred to the same as in the first embodiment. .

The rice-polishing post-treatment device of the present invention is not limited to the above-mentioned embodiment, and can be freely modified within the scope of the claims.

[0025]

EFFECTS OF THE INVENTION In the rice polishing post-treatment device of the present invention, the skin bran adhered to the surface of the polished rice is removed by transferring it to the cooling rod, and the polished rice is rich in whiteness and has gloss. The polished rice can be cooked as it is without the need to wash it with water. Furthermore, since the milled rice discharged from the rice mill is completely removed by the apparatus of the present invention, no bran powder is produced in the subsequent working process and no bran beads are produced. Therefore, it is possible to prevent a malfunctioning accident due to clogging and a decrease in product value due to the mixture of bran balls. Further, in the present invention, heat can be taken from the polished rice to lower the rice temperature at the same time as the removal of the skin bran, so that it is possible to prevent the deterioration of the taste caused by leaving the rice in a high temperature state after the polishing.

According to the second aspect of the present invention, the cooling rod body is a circular pipe, and the low temperature fluid flows through the inner surface of the pipe, so that the cooling rod body can be cooled efficiently.

According to the third aspect, since the cooling rod body is cooled from the outside, the structure can be simplified.

According to the fourth aspect of the present invention, the distance between the cooling rods is set to about 1 mm. Therefore, there is no leakage of rice from the gap and the rods are rubbed against each other to prevent the rods from rubbing. It is possible to effectively remove and remove the bran transferred to.

According to the fifth aspect, the bran peeled off from the cooling rod can be properly removed to the outside, and it is also effective in radiating the polished rice in the cooling cylinder.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment of a rice-polishing post-treatment device of the present invention.

FIG. 2 is an enlarged cross-sectional view of a cooling cylinder.

FIG. 3 is an enlarged vertical sectional view of a support portion of a cooling pipe.

FIG. 4 is a transverse sectional view of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling cylinder 2 Cooling pipe 3 Pipe interval 4 Supporting member 5 Array support plate 6 Holding plate 7 Vent hole 8 Vent chamber 9 Exhaust port 10 Stirrer 11 Protrusion 12 Grain transfer body 20 Intake device 30 Cooling round bar 31 Outer cover 34 Blower

Claims (5)

[Claims] 1. A large number of cooling rods comprising a cooling cylinder and an agitating member rotatably provided inside the cooling cylinder, wherein the wall surface of the cooling cylinder is arranged on the circumference line at a slight interval. This cooling rod body is rotatably supported by rotation, and
A rice-polishing post-treatment device that is cooled by a fluid that is cooler than the rice temperature. 2. The rice-polishing post-treatment device according to claim 1, wherein the cooling rod is a hollow cooling pipe 2 having a circular cross section, and a fluid having a temperature lower than rice temperature is made to flow inside the pipe. 3. The rice-polishing post-treatment device according to claim 1, wherein air having a temperature lower than rice temperature is made to flow to the outer surface of the cooling rod body. 4. The rice-polishing post-treatment device according to claim 1, wherein the intervals between the cooling rods are about 1 mm. 5. The rice-polishing post-treatment device according to claim 1, wherein a wind blows from the wall surface of the agitator 10.