JP3312278B2 - Vertical rice mill with multiple milling chambers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises two or three refining chambers corresponding to the size of rice grains which become smaller as the refining rate progresses. The present invention relates to a vertical rice mill suitable for a rice mill.

[0002]

2. Description of the Related Art Conventional vertical milling machines usually have one milling chamber, and milling of general sake brewed rice having a milling ratio (ratio of the residual mass of milled rice to the mass of brown rice) of 70% or less until milling is completed. This one rice milling machine is used to mill rice. For the milling of high-grade sake brewed rice with a milling rate of 70 or more, two or three milling machines having a milling function according to the size of rice grains reduced by milling are used. Rice was polished in order. As a special case, for example, as disclosed in Japanese Utility Model Publication No. 33-3067, an upright shaft is provided with two large and small refining chambers in series, with the large and small chambers stacked one on top of the other. It has a large capacity and the lower whitening chamber has a small whitening ability and is intended to prevent over-whitening and to improve the yield by being whitened in a state mixed with bran. As described above, there has been known an apparatus in which three trochanters are provided in a single refining chamber in a state of being stacked on a single erect shaft and intended to improve the refining ability.

[0003]

The milling chamber of the milling machine has a milling trochanter made of a grinding wheel rotating inside, and rice grains flowing down the milling chamber are located between the inner wall of the milling chamber and the outer circumference of the milling trochanter. When passing through the gap, it is ground by contacting the outer periphery of the milling trochanter, so that the milling ability greatly changes depending on the ratio between the size of the rice grains and the size of the gap.

The rice polishing rate is as low as 90% or more for cooked rice, so that there is no problem in polishing rice in one milling room. However, for brewed rice, the rice polishing rate is usually about 70%, which is high in recent years. From the trend of quality improvement, it has been required to increase the rice polishing rate from more than 50% to about 30%.

[0005] When it is attempted to grind in a single polishing chamber to a high polishing rate, the size of the rice grains decreases as the polishing rate increases, and the rice grains are ground when passing through the gap between the inner wall of the polishing chamber and the outer periphery of the polishing trochanter. There has been a problem that the rate of passing without contacting the outer periphery of the grindstone is increased, the grinding efficiency is reduced, and the milling time is significantly increased.

For example, when polishing rice in one polishing room, 12
Normally, 7 kg is used to mill 00Kg of brown rice to a 70% milling rate.
It takes 8 to 8 hours, but it takes 30 to 40 hours to increase to 50%, and it is impossible to reach 30%, so conventionally two or three rice mills are installed. Then, the rice is polished in two stages of coarse and finish, or three stages of coarse, medium and finish, and this raises the problem that the equipment cost increases and a large installation space is required.

An object of the present invention is to solve the above-mentioned conventional problems and to achieve a high rice polishing rate with one rice polishing machine.

[0008]

According to the present invention, a plurality of juxtaposed refining chambers having different refining functions by changing the gap size between the inner wall of the refining chamber and the outer diameter of the refining trochanter or the particle size of the refining trochanter. And a rice milling tank for flowing rice, and a vertical rice milling machine was configured to selectively connect a plurality of milling chambers to the rice milling tank.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings. 1 to 3 show the first embodiment, FIGS. 4 to 6 show the second embodiment, FIGS. 7 to 9 show the third embodiment, and FIGS.
1 is a cross-sectional view showing the details of a refining chamber common to each embodiment, and components having the same function in each embodiment will be described with the same name and the same reference numeral, even if they have different shapes. .

Embodiment 1 FIG. 1 is a front view, FIG. 2 is a view taken along the line AA, and FIG.
In the drawing viewed in the direction of the line B, a first refining chamber (2) and a second refining chamber (2a) are fixed side by side to a frame-shaped frame (1), and the first and second refining chambers are fixed. (2) A rice mill tank (3) is mounted above the middle of (2a), and a sieve (4) for removing bran is also mounted below the frame (1).

A supply passage (5) branched from the lower end of the rice polishing tank (3) into two branches is provided so that the lower ends of the two ports communicate with the centers of the upper ends of the first and second polishing chambers (2) and (2a). A switching valve (6) is provided at a forked branch of the supply passage (5), and one of the two forks is closed by alternate switching, and the other is opened to open either of the first and second refining chambers (2) and (2a). One of them is to supply the rice flowing down from the rice polishing tank (3).

The outlets of the first and second refining chambers (2) and (2a) are connected to the upper ends of two outlets of a V-shaped discharge passage (7), and the lower end of one outlet communicates with the upper end of a sieve (4). Rice and bran discharged from the first and second refining chambers (2) and (2a) are sent to a sieve (4) to sift the bran.

The rice from which the bran has been removed is lifted from the lower end of the sieve (4) to the upper end of the rice polishing tank (3) by an elevator with a conveyor (not shown), supplied to the rice polishing tank (3) and circulated. Refining room (2) or second refining room (2
Repeat a) many times to refine.

The first and second refining chambers (2) and (2a) described above.
Is a belt suspended from a pulley (11) of an electric motor (10) attached to a frame (1) to a pulley (9) (9a) attached to a lower end thereof through an electromagnetic clutch (8) (8a). According to (12), only one of the electromagnetic clutches (8) and (8a) is driven to 0N, and the structure of the first and second refining chambers (2) and (2a) is as shown in FIG.
0, as shown in FIG.
Inside 3), a polishing trochanter (14) made of a substantially inverted conical grinding wheel mounted on a vertical axis (not shown) driven by a pulley (9) or (9a) is rotatably built therein. I have.

The milled trochanter (14) has two circumferential grooves (1).
4a) The outer peripheral part (14c) of three steps of upper, middle and lower according to (14b)
(14d) and (14e) are formed, and on the inner periphery of the casing (13) corresponding to the upper outer peripheral portion (14c), a regulating ring (15) for restricting rice flow is provided, and an upper outer peripheral portion (14c). Are provided with an appropriate gap (T) between them, and the inner periphery of the casing (13) corresponding to the outer peripheral part (14d) and the lower peripheral part (14e) of the middle part has the middle part and the lower part having different positions. A resistance piece (16) is attached to each part, and the resistance piece (16) is used for rotating rice which flows down between the regulating ring (15) and the outer peripheral portion (14c) of the milling trochanter (14). Is given to the turning, and is mainly ground when the rice grain passes through the gap (T1) between the resistance piece (16) and the middle outer peripheral portion (14d) and the lower outer peripheral portion (14e). Rice grains are agitated in places with wide circumferential grooves (14a) (14b) It is it is such that the total circumference of the rice grains to various rotation is ground on average.

The setting of the gaps (T) and (T1) is as follows:
It is a value suitable for the size of the rice grain passing here,
This gap size is set in the first refining chamber (2) and the second refining chamber (2a).
By changing the rice polishing rate, for example,
% And the second refining chamber (2a) is from 70% to 50%, the gap size of the first refining chamber (2)> the second refining chamber (2)
The size of the gap is set to a). Thus, after the rice is first milled to 70% in the first milling chamber (2), the switching valve (6) is switched and continuously 50% in the second milling chamber (2a). When the rice is polished to a maximum, a rice polishing rate of 50% can be achieved in a shorter time than in a single polishing chamber.

Embodiment 2 FIG. 4 is a front view, FIG. 5 is a view taken in the direction of the line CC, and FIG.
-A view seen in the direction of the line D, a turning shaft (20) is vertically fixed to the frame-shaped frame (1), and the refining chamber mounting seat (21) is rotatably supported on the turning shaft (20). The first and second refining chambers (2) and (2a), which are the same as those in the first embodiment, are provided on the circumference of the refining chamber mounting seat (21) around the pivot (20).
The second refining chamber (2a) is mounted vertically, and when either the first refining chamber (2) or the second refining chamber (2a) is located at the center of the frame (1), the rice polishing tank (3) is placed above the center. ) Is also attached to the frame (1) with a sieve (4) below, and between the milling tank (3) and the sieve (4), a first milling chamber (2) or a second milling chamber (2).
a) is rotated about the turning shaft (20) and positioned to grind rice as in the first embodiment. The driving structure of the first refining chamber (2) and the second refining chamber (2a) by the electric motor (10) is the same as that of the first embodiment.

Embodiment 3 Embodiment 3 shows an example in which three refining chambers are provided. FIG. 7 is a front view, FIG. 8 is a view taken in the direction of the line EE, and FIG. -A frame-shaped frame (1) as viewed in the direction of the F line.
Then, two rails (30) are laid in parallel in the horizontal direction, and a rectangular refinement chamber mounting seat (32) having four wheels (31) on the lower surface is mounted on the rails (30) in the horizontal direction. The first, second, and third refining chambers (2), (2a), and (2) are mounted movably and mounted on the refining chamber mounting seat (32) in the same manner as in the first embodiment.
b) are vertically mounted at equal intervals in a horizontal row.
In the second and third refining chambers (2), (2a) and (2b), driving motors (10) are respectively mounted on the refining chamber mounting seats (32).

The first and second frames at the center of the frame (1)
A third rice milling tank (2), a rice mill tank (3) at a position corresponding to the upper end of (2b), and a sieve (4) at a position corresponding to the lower end attached to the frame (1). The mounting seat (32) is laterally moved along the rail (30), and the first, second, and third milling chambers (2), (2a), (2b) are sequentially positioned at the milling tank (3) and the sieve (4). Rice is fixed to the rice. The first, second and third refining rooms (2)
(2a) and (2b), for example, the first milling chamber (2) has a rice milling rate of up to 70%, the second milling chamber (2a) has a milling rate of 70% to 50%, and the third milling chamber (2b) has a milling rate of 50%. % To 30
%, The gap dimension of the first milling chamber (2)> the gap dimension of the second milling chamber (2a)> the gap dimension of the third milling chamber (2b), and thus the first milling chamber (2) 2) 70
%, And then milled to 50% in the second milling chamber (2a), and further milled to a 30% milling rate in the third milling chamber (2b), it is possible to achieve an extremely high milling rate of 30% in a short time. Things.

[0020]

According to the vertical milling machine according to the present invention described above, one milling machine has two or three milling chambers,
By using a structure in which components other than a single milling room are also used for each milling room, a high rice milling rate similar to the conventional two or three milling machines connected in series can be obtained quickly with inexpensive equipment. This can be achieved, and the equipment becomes compact and the occupancy of the installation place is reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment.

FIG. 2 is a view of FIG. 1 as viewed in the direction of line AA.

FIG. 3 is a diagram of FIG. 1 as viewed in the direction of line BB.

FIG. 4 is a front view of the second embodiment.

FIG. 5 is a diagram of FIG. 4 as viewed in the direction of the line CC.

FIG. 6 is a view of FIG. 4 as seen in the direction of the line DD.

FIG. 7 is a front view of a third embodiment.

FIG. 8 is a view of FIG. 7 as seen in the direction of the line EE.

FIG. 9 is a view of FIG. 7 as viewed in the direction of line FF.

FIG. 10 is a longitudinal sectional view of a whitening room common to Examples 1, 2, and 3.

11 is a sectional view taken along line GG of FIG.

[Explanation of symbols]

 1 frame 2 milling room 2a milling room 2b milling room 3 milling tank 4 sieve

Claims (5)

(57) [Claims] 1. A milling tank for flowing down rice, a plurality of milling chambers selectively connected to the milling tank, and means for circulating rice from the milling chamber to the milling tank, wherein the milling chamber is ground. A plurality of polishing chambers having a polishing trochanter composed of a grindstone and having a different polishing function by changing the gap size between the polishing trochanter and the inner wall of the polishing chamber or the particle size of the polishing trochanter. Vertical rice milling machine. 2. A milling tank for flowing down rice, a plurality of milling chambers selectively connected to the milling tank, and a means for circulating rice from the milling chamber to the milling tank, wherein the milling chamber is ground. Having a milling trochanter made of a whetstone, while changing the milling function by changing the gap dimension between the milling trochanter and the inner wall of the milling chamber, and performing rice polishing using the gap dimension in descending order. A vertical rice milling machine equipped with a number of refining chambers. 3. The vertical rice mill according to claim 1, wherein a supply passage is provided from the rice polishing tank to each of the polishing chambers, and the supply passage is switched to select a polishing chamber. 4. The vertical rice mill according to claim 1, wherein the plurality of polishing chambers are mounted on a polishing chamber mounting seat, and the polishing chamber is selected by rotating the polishing chamber mounting seat. 5. The vertical rice mill according to claim 1, wherein the plurality of polishing chambers are movably mounted on a rail, and the polishing chamber is selected by moving the polishing chamber.