JPS6135900B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a rice milling method and a rice milling apparatus, particularly for long-grain rice such as Indica, which generates a large amount of broken rice with ordinary milling means. Uniform polishing of long grain rice
The purpose of this is to minimize the occurrence of broken rice.

In order to achieve this object, the present invention allows the rice grains to naturally flow down into gaps in the vertical (including almost vertical) direction, so that the direction of the long axis of the rice grains, which is a characteristic of the rice grains, is adjusted. Taking advantage of the property that the rice grains naturally align in the direction of the flowing flow, the rice grains are arranged so that their long axes are aligned in the vertical direction and flow down. Applying the pressure that causes the generation of broken rice to the rice grains by applying a cutting blade that rotates in a direction across the flow and rubs against the surface of the rice grains to scrape the rice grains from a horizontal direction. It is characterized by the fact that it is made so that the pulverizing process is carried out without any problems.

Next, the embodiment device will be described in more detail according to the drawings. Reference numeral 1 denotes a base, which is formed into a hollow tower shape, and the lower part of the inner cavity accommodates the motor 2 and the blower device 3. It is formed in a machine room 4, and its upper part is formed as a pressure chamber 5 for storing the pressurized air blown from the above-mentioned blower device 3 through the blow-off pipe 6. Reference numeral 7 denotes an inner cylinder mounted on the base 1, which is elongated in the vertical direction, and has a bottom wall 8.
A rotating shaft 9 extending downward from the base 1 is supported on the upper wall 10 of the base 1 so as to rotate around the rotating shaft 9. The lower end of the rotating shaft 9 is connected to the output shaft 11 of a motor 2 installed in the inner cavity of the base 1, and the inner cylinder 7 is moved in a vertical direction by driving the motor 2. It has a rotation axis along the axis of rotation, and is designed to rotate in forward and reverse directions as well as in one desired direction.

Further, the inner cylinder 7 is provided with blowholes 12, 12, . Through intake ports 13, 13 formed in a shaft cylinder and provided in the peripheral wall of the rotating shaft 9,
The pressure air in the pressure chamber 5 flowing into the inner cavity of the inner cylinder 7 through the inner cavity of the rotating shaft 9 is transmitted to the blowhole 12,
12... to the outer circumferential surface of the inner cylinder 7.

Reference numeral 14 denotes a cutting blade body attached to the outer circumferential surface of the inner cylinder 7, which is formed into a prismatic body with the vertical ridge 15 serving as the blade part, and is detachably attached to the outer circumferential surface of the inner cylinder 7. The seat plate 16 is fixed to the seat plate 16 with a set screw 17 as shown in FIG. It is installed as shown in the figure.
As the inner cylinder 7 rotates, the ridgeline located forward in the direction of rotation becomes a blade that acts on the rice grains, and when the blade is worn out, the cutting blade 14 is rotated 90 degrees. By rotating it one degree at a time and reattaching it to the mounting seat plate 16, one after another,
A new edge 15 is switched into the active position.

Reference numeral 18 denotes an outer cylinder mounted on the upper wall 10 of the base 1 so as to surround the outer periphery of the inner cylinder 7. While the inner cylinder 7 rotates around the rotating shaft 9, it is fixed to the base 1. A longitudinal (vertical) annular gap 20 is formed between the inner cylinder 7 and the outer circumferential surface of the inner cylinder 7, through which the rice grains flow down.

The gap 20 is formed by rotating the cutting blade 14 provided on the outer periphery of the inner cylinder 7 in a horizontal direction to the rice grains flowing down the gap, thereby causing scratches on the surface of the rice grains by the cutting blade 14. This is the milling chamber where rice grains are polished.
In order to make the cutting action of step 4 effective, friction rods 21, 21, . It is designed to do so.

A lower end 23 of a hopper 22 whose lower end is fixed to the upper end of the outer cylinder 18 and fixedly mounted to the base 1 is connected to the upper end of the gap 20. are closed by a shutter 26 having outlet ports 25, 25, . . . whose opening degree can be adjusted by operating an operating rod 24. Further, the outer cylinder 18 has a large number of blowholes 27, 2.
7..., and the jet blowing out into the gap 20 from the blowholes 12, 12... provided in the inner cylinder 7 described above flows through the blowholes 27, 12...
It is formed so as to eject to the outer periphery of the outer cylinder 18 via 27.

30 is an outer cylinder plate formed to further surround the outer cylinder 18, and around the outer cylinder 18,
An annular bran chamber 31 is formed.

Note that 32 is a drain for removing polished rice that communicates with the bottom of the gap 20 which is the above-mentioned polishing chamber, and 33 is the rice bran chamber 31.
34 is the hopper 2
This guide body is attached to the top of the inner cylinder 7 so as to guide the rice grains introduced into the gap 20 to the upper end of the gap 20.

Next, to explain the function and effect, if long grain rice to be polished is put into the hopper 22,
The rice grains sequentially enter the gaps 20 formed along the vertical direction and naturally flow down within the gaps 20, so that the rice grains flow down with their long axes aligned in the vertical direction. Then, the cutting blades 14, 14, etc. provided on the outer periphery of the rotating inner cylinder 7 rub against the rice grains flowing down from the horizontal direction, and polishing is performed.

For this reason, the rice grains are subjected to the milling action with almost no external pressure in the direction of their long axis.
Long-grain rice, which used to have nearly 60% broken rice, can now be polished while keeping the percentage of broken rice low.

Moreover, since the polishing is performed by rubbing the cutting blade against the rice grains, the polishing can be performed without the problem of clogging caused by bran that occurs when using a full-rigid sand grindstone.

Note that the apparatus according to the embodiment of the present invention has a cutting blade 1 that faces the gap 20 in the vertical direction and acts in the horizontal direction.
4, 14... are provided in multiple stages in the vertical direction, rice grains whose posture is disturbed under the action of the cutting blade 14 in the first stage are rectified again while flowing further down, and then the rice grains in the second stage are The cutting blade body 14 acts on the rice grains, and the rice grains taken out from the polished rice take-out gutter 32 are returned to the hopper 22 and the cutting blade body 14 is repeatedly activated. Alternatively, the outer cylinder 30 may be rotated and the cutting blade body 14 may be provided inside the outer cylinder 30, for example.

[Brief explanation of the drawing]

FIG. 1 is a front view of the apparatus according to the embodiment of the present invention, FIG. 2 is a longitudinal sectional front view of the same, and FIG. 3 is a perspective view of the cutting blade body.
FIG. 4 is a sectional view taken along the line A--A in FIG. 1. Explanation of drawing symbols, 1...Base, 7...Inner cylinder, 1
4... Cutting blade body, 18... Outer cylinder, 20... Gap,
22...Hopper.

Claims (1)

[Scope of Claims] 1. Rice grains are allowed to naturally flow down in a vertical direction so that the long axes of the rice grains are aligned in the direction of the flow, and in this state, the rice grains are allowed to flow across the flow of the rice grains. A rice polishing method that is characterized by polishing rice grains by applying a cutting blade that moves in a direction and rubs against the surface of the rice grains. 2. A milling chamber is formed so that the rice grains received from the receiving port in the upper part naturally flow down in a vertical direction toward the outlet provided in the lower part, and the flow of the rice grains is controlled by the rice grains flowing down inside the milling chamber. A rice milling device having a cutting blade installed in its milling chamber so as to act in a transverse direction.