WO2014148779A1

WO2014148779A1 - Rice milling machine

Info

Publication number: WO2014148779A1
Application number: PCT/KR2014/002208
Authority: WO
Inventors: 나용옥
Original assignee: Na Yong Ok
Priority date: 2013-03-18
Filing date: 2014-03-17
Publication date: 2014-09-25
Also published as: KR20140114164A; KR101483762B1

Abstract

The present invention relates to a rice milling machine which can dicharge rice bran smoothly and supply enough air to cool the rice grain. More specifically, the present invention relates to a rice milling machine which can process brown rice into white rice that can be cooked without washing, i.e. clean rice (no-wash rice). The rice milling machine according to the present invention comprises: a main body having on one end a hopper through which rice grain is supplied, and having on the other end a discharge port through which rice grain is discharged; a drive shaft rotatably provided in the main body so as to slope from the hopper towards the discharge port; a brown rice processing rotor installed on the drive shaft, and removing rice bran of rice grain supplied through the hopper while compressing and forwarding same toward the discharge port; a screen installed on the exterior of the brown rice processing rotor with a space in between, and separating the removed rice bran; and a drive motor which transmits rotational force to the drive shaft.

Description

Rice cleaning machine

The present invention relates to a rice scouring machine capable of supplying sufficient air to smoothly discharge rice bran and cool the rice grains. More specifically, the present invention relates to a rice polisher that can be processed into white rice, which is cookable without washing brown rice, that is, clean rice.

Generally, rice husks removed from rice paddies are called brown rice (100 degrees, white degree ± 20), and rice bran layers, which refer to the outermost layer of brown rice, such as rinds of skin, seed, endosperm, and whistle, are called white rice. White rice is divided into 5 minutes, 7 minutes, and 10 minutes depending on the degree of milling. The process of separating rice bran (rice bran) from brown rice is called the milling process, and the device used in the milling process is called rice milling.

As a method for milling brown rice, a grinding method, a friction method, and a cutting method are known. The present invention relates to a rice mill of the cutting method.

Republic of Korea Patent No. 664,675 (name of the invention: bran-cutting rice mill) discloses a rice mill of the cutting method having a hollow shaft, a cutter ring, a spacer and a baffle ring. In the bran cutting type rice polishing machine disclosed in the patent, a cutter ring and a spacer are alternately inserted into a hollow shaft in which a vent hole is formed. On the outer circumferential surface of the cutter ring, a plurality of arc-shaped grooves are formed at equal intervals and the brown rice is cut while being fed into the arc-shaped grooves. In addition, an obtuse portion for cutting brown rice is formed on the outer circumferential surface of the spacer, and an open cutout portion is formed to discharge air supplied to the hollow shaft.

The bran-cut rice mill disclosed in the above patent has a problem that the white rice is not completely discharged in the whitening chamber and the remaining amount remains even after the milling process is completed. This problem is caused by a gap between the screen and the hollow shaft installed horizontally as the center of the screen is struck when used for a long time. In addition, since a large horsepower driving motor is required to horizontally feed rice, there is a problem in that the manufacturing cost and the maintenance cost are increased.

In addition, when the brown rice supplied through the hopper, the residual rice bran is not cleanly processed on the surface of the polished white rice, the temperature of the rice is high, there is a problem that deterioration during storage. This problem is because the rice bran is not completely removed due to insufficient amount of air supplied through the hollow shaft and the cutout of the spacer, and at the same time, the rice is not sufficiently cooled during milling. This is because the brown rice does not pass smoothly through the arc-shaped groove formed on the outer circumferential surface of the cutter ring. If the grains are not conveyed smoothly during the milling process, the grains of rice grains come into contact with the side wall or the screen of the cutter ring, resulting in high contact pressure and increased frictional heat. As a result, the yield of the mill is reduced.

The present invention is devised to improve the problems of the conventional cutting type rice polishing machine as described above.

The present invention is because the drive shaft equipped with the brown rice processing rotating body is installed inclined in the direction of the white rice outlet in the hopper for supplying the brown rice, the milled rice is naturally flowing in the discharge direction to provide a rice polisher with no residue remaining inside the white room. The purpose.

In addition, an object of the present invention is to provide a rice mill configured to smoothly convey the grains of rice at the time of milling.

It is also an object of the present invention to provide a rice polisher configured to smoothly discharge rice bran at the time of milling and to supply sufficient air to cool the rice grains.

According to one aspect of the present invention, there is provided a milling machine of a cutting method provided with a micromachined rotating body. The rice cleaning machine according to the present invention includes a main body having a hopper to which rice grains are supplied at one end and an outlet for discharging rice grains at the other end thereof, a drive shaft rotatably installed on the main body so as to be inclined in the discharge port direction from the hopper, and mounted on the drive shaft. The brown rice processing rotating body which presses and transports the rice bran of rice grain supplied through the hopper while being pressed and discharged in the direction of the outlet, the screen which is installed at the outside of the brown rice processing rotating body and separates only the removed rice bran, and transmits the rotational force to the drive shaft. It includes a drive motor.

The micro-machined rotary body of an embodiment according to the present invention includes a screw mounted on a drive shaft, a support shaft having a hollow cylindrical shape so as to be installed adjacent to the screw, and having at least one key groove formed in the longitudinal direction on the inner and outer circumferential surfaces thereof, And a plurality of cutting rings fitted and coupled to the support shaft, and a plurality of gap rings fitted and coupled to the support shaft so as to be disposed between the plurality of cutting rings. The cutting ring according to the present invention has a ring shape having a constant thickness, and has a plurality of cutting passages formed to connect both sides of the ring such that rice bran is cut while rice grains are passed through the outer circumferential surface, and a keyway connection protrusion formed on the inner circumferential surface of the driving shaft. It is fitted in the key groove formed on the outer peripheral surface. The cutting passage has a channel shape extending to both sides of the ring, and the channel includes a bottom surface and a pair of sides extending from both sides of the bottom surface. The brown rice passing through the cutting passage contacts the edge of the channel and the rice bran is cut and polished. In particular, netting is achieved while simultaneously contacting the bottom and side surfaces near the edge of the channel. Moreover, each spacing ring is ring-shaped with fixed thickness, is arrange | positioned between a some cutting ring, and the keyway connection protrusion formed in the inner peripheral surface is fitted in the key groove formed in the outer peripheral surface of the support shaft, and is engaged.

In one embodiment, the bottom surface of the cutting ring is a plane perpendicular to the plane passing through the center axis of the cutting ring, and both sides may be configured to meet the bottom surface at an angle of at least 90 °. In addition, in order to increase the cutting effect of the grain of rice passing through the space between the screen and the cutting ring, the outer peripheral surface between each neighboring cutting passage may be formed in a plane perpendicular to the plane passing through the center axis of the cutting ring.

In one embodiment, the cutting ring supports the cutting ring so as to secure an air passage between the support shaft and the inner circumferential surface inserted and coupled inwardly, and is disposed at regular intervals in the circumferential direction from the inner circumferential surface and extends inwardly toward the center axis line. And a plurality of support portions and keyway connection protrusions formed on at least one end of the plurality of supports.

In one embodiment, the spacing ring supports the spacing ring so as to secure an air passage between the support shaft and the inner circumferential surface inserted and coupled inwardly, and is disposed at regular intervals in the circumferential direction from the inner circumferential surface, and extends inward toward the central axis. A plurality of supporting portions, a keyway connecting protrusion formed at at least one end of the plurality of supporting portions, and an air passage channel formed at one side of the ring in a radial direction so as to secure an air passage in which the outer and inner circumferential surfaces communicate on one side of the ring. Include.

In some embodiments, a plurality of cutting passages are formed in a ring shape of a certain thickness so as to be installed at the outermost end of at least one of the plurality of cutting rings, and are formed to connect both sides of the ring so that the rice bran is cut while passing through the outer circumferential surface And an auxiliary cutting ring in which an air passage is formed to communicate with the air passage of the cutting ring.

In some embodiments, air for cooling the rice grains may be supplied through a space formed by the inner circumferential surface of the cutting ring and the inner circumferential surface of the spacing ring through an air supply hole formed in the main body end, which is the outer circumferential surface of the drive shaft, in the refining process. In addition, the spacer ring supports the ring so as to secure an air passage between the support shaft and the inner circumferential surface inserted and coupled inwardly, and is disposed at regular intervals in the circumferential direction on the inner circumferential surface, and extends inwardly toward the center axis. And the keyway connecting protrusion of the spacing ring may be formed at an end of the at least one spacing ring support. In addition, an air ring is inserted in order to secure a clearance between the gap ring and the cutting ring to allow air to flow. The air ring has a ring shape having a constant thickness and is disposed between the cutting ring and the spacing ring, the outer diameter of which is smaller than the inner circumferential surface of the spacing ring, and a keyway connecting protrusion formed on the inner circumferential surface can be fitted into the key groove formed on the outer circumferential surface of the support shaft.

In some embodiments, the drive shaft equipped with the micro-processing rotary body according to the present invention may be installed to be inclined toward the outlet in the hopper in order to smoothly transfer the rice grain supplied through the hopper in the outlet direction. It is preferable that the inclination angle of the drive shaft is in the range of 5 ° to 30 °.

In some embodiments, the cutting ring assembly according to the present invention may further comprise an induction blade to facilitate the feeding of rice grains. The guide blade may be inserted and fixed to the outer circumferential surface of the plurality of cutting rings to be inclined spirally at an angle along the longitudinal direction of the drive shaft. It is preferable that the inclination angle is in the range of 0 ° to 45 ° when the guide blade is fixed.

According to another embodiment, the brown rice processing rotating body may form at least one air supply hole along the length direction of the support shaft to cool the rice grains by using the air supplied through the hollow support shaft in the refining process. At this time, the drive shaft is a hollow cylindrical shape, the drive shaft is provided with at least one air supply hole along the longitudinal direction so as to communicate with the air supply hole of the support shaft. In addition, the gap ring may include a cutout in which the inner circumferential surface and the outer circumferential surface are opened such that air supplied through the air supply hole of the support shaft is discharged through the gap ring.

The rice mill according to the present invention, because the brown rice processing rotating body is installed on the drive shaft inclined in the direction of the outlet from the hopper, the white rice flows naturally in the outlet direction so that the remaining amount does not remain in the interior of the white room, the recovery rate is improved have. In addition, since white rice is pumped while flowing down toward the outlet, it is possible to use a driving motor having a small horsepower, thereby reducing the manufacturing cost and maintenance cost.

In addition, the rice mill according to the present invention has the effect that the cutting ring is a channel-shaped cutting passage is formed can remove the rice bran layer without damaging the brown rice. In addition, the cutting passage between the cutting ring and the cutting ring to move the rice is formed in the channel shape can effectively cut the surface of the rice grain to be milled.

In addition, the rice mill according to the present invention supplies a large amount of air evenly between the cutting ring and the spacing ring. Therefore, the rice grains are smoothly transferred and the rice brans are completely discharged so that the remaining rice bran does not stick to the surface of the rice grains and effectively cools the rice grains to prevent deterioration of the milled rice grains. In addition, the surface of the milled rice can produce clean, clean, and long-term storage.

In addition, the rice cleaning machine according to the present invention is provided with an induction blade in the brown rice processing rotating body, it is possible to effectively feed the grain of rice at the time of milling, it is possible to operate the rice mill at high speed, it is possible to easily adjust the degree of milling. In addition, the rice grains are less damaged during the milling, so that the susceptibility of 92% or more can be achieved depending on the driving conditions during the milling.

1 is a perspective view of one embodiment of a rice mill according to the present invention.

2 is a partial cross-sectional view of the rice mill shown in FIG. 1.

3 is a perspective view of one embodiment of a screw installed in the microfabricated rotating body shown in FIG.

4 is a perspective view of one embodiment of a cutting ring assembly installed in the microfabricated rotating body shown in FIG. 2.

5 is an exploded perspective view of the cutting ring assembly shown in FIG. 4.

6 is a front view of one embodiment of the cutting ring shown in FIG.

7 is a front view of one embodiment of the spacing ring shown in FIG.

FIG. 8 is a cross-sectional view taken along the line A-A of FIG. 2 and is an explanatory view showing a state in which the grain of rice is cut in the cutting ring assembly of the embodiment shown in FIG.

9 is a front view of one embodiment of an air ring that may be used in a cutting ring assembly in accordance with the present invention.

10 is a schematic cross-sectional view showing another embodiment of the rice cleaning machine according to the present invention.

11 is a perspective view of another embodiment of the cutting ring assembly shown in FIG. 10.

12 is an exploded perspective view of the cutting ring assembly shown in FIG. 11.

FIG. 13 is a front view of another embodiment of the cutting ring shown in FIG. 12.

14 is a front view of another embodiment of the spacing ring shown in FIG. 12.

FIG. 15 is a cross-sectional view taken along line B-B of FIG. 10 and is an explanatory view showing a state in which the grain of rice is cut in the cutting ring assembly of another embodiment shown in FIG.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

Hereinafter, preferred embodiments of the rice cleaning machine according to the present invention will be described in detail with reference to the accompanying drawings. In the description, in the description of the cutting ring, the spacing ring and the air ring having a ring shape, one side is the front side of the ring and the other side is the rear side of the ring when viewed in the conveying direction of the grain of rice, and the one side and the other side are connected The side is called the outer circumferential surface of the ring and the inner side is defined as the inner circumferential surface of the ring.

1 is a perspective view of one embodiment of a rice mill according to the present invention, Figure 2 is a partial cross-sectional view of the rice mill shown in FIG.

Referring to FIG. 1, the rice polisher 100 includes a main body 110. The whitening chamber 111 is provided on the main body 110. The hopper 112 is provided at an upper end of the whitening chamber 111, and the brown rice supplied through the hopper 112 is transferred to the brown rice processing rotating body 160. The white rice discharge port 113 is installed at the other end lower part of the whitening chamber 111, and discharges the rice grain which was inverted by the brown rice processing rotating body 160 to the outside. The rice bran outlet 114 is installed at the bottom of the brown rice processing rotating body 160, and discharges rice bran, which is rice bran removed from the grains of rice, when the brown rice is inverted to white rice.

The drive shaft 120 is rotatably installed in the center of the white room 111 so as to be inclined toward the white rice outlet 113 from the hopper 112. The driven pulley 121 is installed at one end of the drive shaft 120. In addition, the outer peripheral surface of the drive shaft 120 is provided with a brown rice processing rotating body 160 for pressing and conveying the rice bran of the rice grain supplied through the hopper 112 in the direction of the white rice outlet (113). And both ends of the drive shaft 120 is of course supported by the first bearing 115 and the second bearing 116. The minute adjuster 117 is installed at the other end of the whitening thread 111, and the white rice inverted by the brown rice processing rotating body 160 pushes the plate of the minute adjuster and is discharged to the white rice outlet 113. Cutting ring assembly 180 of the embodiment according to the present invention, in order to smoothly transfer the rice grain supplied through the hopper 112 in the direction of the white rice outlet 113, in the direction of the white rice outlet 113 from the hopper 112. Can be installed obliquely. In this case, the inclination angle a of the driving shaft 120 is preferably about 15 °, but is not limited thereto. The inclination angle of the drive shaft 120 can adjust the inclination angle within the range of 5 ° ~ 30 ° according to the length, degree of precision or yield.

The drive motor 130 is mounted below the main body 110 and a drive pulley (not shown) is installed on the shaft of the drive motor 130. The belt 140 is connected to the driven pulley 121 of the drive shaft 120 and the drive pulley of the drive motor 130, respectively. Therefore, when the driving motor 120 operates, the belt 140 rotates while the driving pulley rotates, and the driven pulley 121 is rotated by the rotational force of the belt 140. The rotational force of the driven pulley 121 is transmitted to the drive shaft 120 and the micro-machined rotating body 160 rotates in the same direction as the rotational direction of the drive shaft 120. Screen 150 is installed at intervals on the outside of the brown rice processing rotating body 160, and discharges the rice bran removed during the milling to the outside. The microfabricated rotating body 160 includes a screw 170 and a cutting ring assembly 180. The micro-machined rotary body according to an embodiment of the present invention uses a cutting ring assembly, but is not limited thereto. A roller assembly, a polishing assembly, or the like may also be used.

2 and 3, when the drive shaft 120 rotates, the brown rice supplied to the hopper 112 is pushed toward the cutting ring assembly 180 by the screw 170 which is the brown rice processing rotating body 160. The screw 170 has a shaft hole 171 through which a center thereof is penetrated to be mounted on the drive shaft 120, and has a blade 172 spirally formed on an outer circumferential surface thereof. Further, a plurality of through holes 173 are formed in the axial hole 171 in the circumferential direction. Then, the brown rice pushed by the screw 120 is pushed toward the white rice outlet 113 while passing through the adjacent cutting passage 12 of the cutting ring assembly 180 that rotates together with the drive shaft 120. The rice grains passing through the cutting passage 12 pass through the bottom surface 12a of the cutting passage 12 and the edges of the pair of side surfaces 12b extending on both sides of the bottom surface 12a. It is cut off and removed.

The rice mill 100 according to the present embodiment includes an air supply hole 118 that supplies air to the outside of the main body 110 adjacent to the driven pulley 121. The air supplied to the air supply hole 118 passes through the through hole 173 formed in the screw 170, the micromachined rotating body 160, into an air passage formed in each ring installed in the cutting ring assembly 180. Supplied. The large amount of air supplied as described above discharges the rice bran which is cut rice bran to the outside of the screen 150 so that the rice bran does not stick to the rice grains and remains. In addition, the rice grains having a high temperature are cooled by friction between the cutting ring and the spacer ring installed in the cutting ring assembly 180.

4 is a perspective view of one embodiment of a cutting ring assembly installed in the microfabricated rotating body shown in FIG. 2, and FIG. 5 is an exploded perspective view of the cutting ring assembly shown in FIG.

Referring to FIG. 4, the cutting ring assembly 180 installed in the micromachined rotating body 160 of the present embodiment includes a plurality of cutting rings 10 and a plurality of spacing rings assembled by being alternately fitted to the support shaft 30. 20) and a plurality of guide blades 50 coupled to grooves formed so as to be inclined to outer peripheral surfaces of the auxiliary cutting ring 40 and the plurality of cutting rings 10 respectively provided at both ends.

Referring to FIG. 5, the support shaft 30 of one embodiment has a hollow shaft 31 formed to be mounted on the fixed shaft 120, and

key grooves

32 and 33 are formed in the longitudinal direction on the outer circumferential surface and the inner circumferential surface, respectively. It is. The key groove formed on the outer circumferential surface of the support shaft 30 is called the outer key groove 32, and the key groove engaging projection 14 of the plurality of cutting rings 10 and the key groove of the spacer ring 20 are connected to the outer key groove 32. The protrusions 24 are fitted and engaged. Four outer key grooves 32 according to the present invention are formed at intervals such as 90 °, but are not limited thereto. And the key groove formed on the inner circumferential surface of the support shaft 30 is called the inner key groove 33, the key for coupling so as to transmit the power of the drive shaft 120 inserted into the hollow 31 of the support shaft 30 is inserted. In addition, the air supply hole 34 may be formed in the support shaft 30. At least one air supply hole 34 is formed along the longitudinal direction of the support shaft 30 so as to communicate with the hollow shaft 31. Therefore, the outside air supplied to the hollow shaft 31 passes through the air supply hole 34 and is discharged radially outward of the cutting ring assembly 180.

Figure 6 shows an embodiment of a cutting ring according to the present invention. The cutting ring 10 has a ring shape in which a support shaft fitting hole 11 is formed at the center and has a constant thickness. The cutting passage 12 has a channel shape in which the front and rear surfaces are connected to each other. The channel includes a bottom face 12a and a pair of side faces 12b extending on both sides of the bottom face 12a. The plurality of cutting passages 12 are formed on the outer circumferential surface of the cutting ring 10 at equal intervals, but may not be equal intervals in other embodiments. The rice bran is cut in contact with the edge (edge) of the bottom surface 12a of the channel and the edge (edge) of the side surface 12b as it passes through the cutting passage 12. In particular, the cutting ring 10 of the present embodiment has an edge of the bottom surface 12a and the edges of both sides 12b when the grain of rice passes through the portion where the bottom surface 12a of the channel and the pair of side surfaces 12b meet. The cutting effect is excellent while simultaneously cutting in contact with (see FIG. 8).

And the channel-shaped cutting passage 12 is the bottom surface 12a is a plane perpendicular to the plane passing through the center axis of the cutting ring 10, both sides 12b are angles of 90 degrees or more with the bottom surface 12a It is configured to meet with. Therefore, the substantially rugby ball-shaped rice grains passing through the cutting passage 12 are not caught in the corners of the cutting passage 12 to increase the cutting effect. In addition, a ring between the cutting passage 12 and the cutting passage 12 so that the rice grain passing through the space between the cutting ring 10 and the screen 150 contacts the outer circumferential edge of the cutting ring 10 to effectively cut the rice bran. It is preferable that the outer circumferential surface of is formed in a plane perpendicular to the plane passing through the central axis of the cutting ring 10, like the bottom surface 12a.

In addition, the support part 13 extends from the inner peripheral surface of the cutting ring 10 to the support shaft fitting hole 11, and is provided in plurality at regular intervals along the circumferential direction of the cutting ring 10. In this embodiment, four are extended inward toward the center axis of the cutting ring 10, but is not limited thereto. And the key groove connecting projection 14 is formed at the end of each support 13, each key groove connecting projection 14 is fitted in the key groove formed in the corresponding support shaft (30). In the present embodiment, the keyway connecting protrusions 14 are all formed at the ends of each support 13, but are not limited thereto and may be formed at at least one end of each support 13. In addition, the air passage 15 is formed between the support shaft 30 and the inner circumferential surface, and air introduced into the air supply passage 118 formed in the main body 110 passes through this space.

7 shows one embodiment of a spacing ring that can be used in the construction of a cutting ring assembly with the cutting ring shown in FIG. 6. The spacing ring 20 has a ring shape having a constant thickness, and a support shaft fitting hole 21 penetrated at the center thereof is formed. The air passage channel 22 is a portion formed radially on one side of the ring so that the inner circumferential surface and the outer circumferential surface of the ring communicate with each other, and when the air passage channel 22 is assembled to the cutting ring assembly 180, air is supplied from the outside. A plurality of support portions 23 are disposed on the inner circumferential surface of the support shaft fitting hole 21 at regular intervals in the circumferential direction. Preferably four extend inward toward the central axis of the spacing ring 20, but is not limited thereto. And the key groove connecting projection 24 is formed at the end of each support 23, it is fitted to the outer key groove 32 formed on the support shaft (30). In the present embodiment, the key groove connecting protrusions 24 are all formed at the ends of the respective support parts 23, but are not limited thereto and may be formed at at least one end of each support part 23. In addition, the air passage 25 is formed between the support shaft 30 and the inner circumferential surface, and the air introduced into the air supply passage 118 formed in the main body 110 passes through this space.

Referring to FIG. 5, the auxiliary cutting ring 40 may be installed when finishing both ends of the cutting ring assembly 180. In some cases, the auxiliary cutting ring 40 may not be installed, and only the cutting ring 30 may be finished. The auxiliary cutting ring 40 has a ring shape having a constant thickness, and a support shaft fitting hole 41 penetrated at the center thereof is formed. The cutting passage 42 has a channel shape in which front and rear surfaces are connected to each other, and has the same structure as the cutting passage 12 of the cutting ring 10, and a detailed description thereof will be omitted below. In addition, the air passage 43 is provided in plural in the circumferential direction of the support shaft fitting hole 41. Therefore, the air introduced into the air supply hole 118 provided in the main body 110 passes through the through hole 173 of the screw 170 and then passes through the air passage 33 of the auxiliary cutting ring 40 to the cutting ring ( 10 and

air passages

15 and 25 of the spacing ring 20.

In addition, in some embodiments the spacing ring provided between the cutting ring 10 and the cutting ring 10 may not be formed with an air passage channel 22 formed in the spacing ring 20 of one embodiment. As such, when using an interval ring not provided with the air passage channel 22, the air ring 60 may be installed. The air ring 60 of this embodiment is installed to secure a clearance for air to flow between the gap ring and the cutting ring.

The air ring 60 has a ring shape having a constant thickness and a support shaft fitting hole 61 penetrated at the center thereof. The key groove connecting protrusion 62 extends in the center direction from the inner circumferential surface of the support shaft fitting hole 61, and is fitted into and coupled to the respective outer key grooves 32 formed on the outer circumferential surface of the support shaft 30. The outer protrusions 63 are formed on the outer circumferential surface of the ring on the outer circumferential surface, and are disposed on the supporting portion of the spacing ring 20. Moreover, it is preferable that the outer diameter of the air ring 60 is smaller than the inner peripheral surface of the support shaft fitting hole 21 of the space ring 20. Therefore, the air supplied to the air passage of the cutting ring in the cutting ring assembly including the air ring 60 is discharged into the gap formed between the cutting ring and the spacing ring by the air ring 60, thereby cutting the cut rice bran out of the screen. So that the rice bran does not stick to the milled rice grains and remain. In addition, the temperature of the rice grains is cooled by the friction of the cutting ring and the spacer ring installed in the cutting ring assembly.

3 and 4, the micromachined rotating body 160 equipped with the screw 170 and the cutting ring assembly 180 is used for a large-scale rice mill. As described above, at least one cutting ring assembly 180 used for a large scale rice cleaning machine may be installed on the fixed shaft 120.

The assembly sequence of the brown rice processing rotating body 160 used for a large-scale rice milling machine as in this embodiment will be described.

First, the blade 172 of the screw 170 is pushed into the fixed shaft 120 to be located below the hopper 112. Next, the cutting ring assembly 180 is installed on the fixed shaft 120. In this case, at least one cutting ring assembly 180 may be installed in accordance with the length of the fixed shaft 120.

Next, the assembling procedure of the cutting ring assembly 180 will be described. First, the auxiliary cutting ring 40 is pushed to the end of the support shaft 30. The cutting ring 10 is inserted into the support shaft 30 and pushed to the end of the auxiliary cutting ring 30. At this time, each key groove connecting protrusion 15 formed in the support shaft fitting hole 11 of the cutting ring 10 is assembled in a state of being fitted into each outer key groove 32 formed on the outer circumferential surface of the support shaft 30. As such, since the key groove connecting protrusion 14 of the cutting ring 10 moves along the outer key groove 32 formed in the support shaft 30, the cutting ring 10 may be installed accurately without being rotated or twisted. In addition, the support part 13 of the cutting ring 10 is assembled in a state in which it is in stable contact with the outer peripheral surface of the support shaft 30.

Next, the spacer ring 20 is inserted into the support shaft 30 and pushed to the cutting ring 10 fitted first. At this time, each of the key groove connecting projections 24 formed in the support shaft fitting hole 21 of the spacing ring 20 is installed in a state of being fitted into each of the outer key grooves 32 formed on the outer circumferential surface of the support shaft 30. As such, the key groove connecting protrusion 24 of the gap ring 20 moves along the outer key groove 32 formed in the support shaft 30, so that the gap ring 20 can be installed accurately without being rotated or twisted. In addition, the support 23 of the spacing ring 20 is installed in a state in which it is in close contact with the outer peripheral surface of the support shaft 30 in a stable manner.

Next, the other cutting ring 10 is pushed to the fitted gap ring 20, and the new gap ring 20 is pushed to the fitted cutting ring 10 first. Thus, the cutting ring 10 and the spaced ring 20 are fitted to the support shaft 30 so that the plurality of spaced rings 20 are alternately arranged between the plurality of cutting rings 10. Then, the auxiliary cutting ring 40 is assembled at the end of the support shaft 300 such that the plurality of cutting rings 10 and the spacing ring 20 are not separated from the support shaft 30.

In one embodiment, the cutting ring assembly 180 includes a plurality of cutting rings 10, a plurality of spacing rings 20, and an auxiliary cutting ring 40 alternately fitted to the support shaft 30, and then fixed shafts. 120 is mounted. In this case, when the cutting ring assembly 180 is integrally assembled, the cutting ring assembly 180 may be damaged and the replacement may be easily performed. In some cases, the plurality of cutting rings 10, the plurality of gap rings 20, and the auxiliary cutting rings 40 may be assembled to the fixed shaft 120 so as not to be separated. At this time, the fixed shaft 120 is a plurality of key grooves are formed in the longitudinal direction on the outer peripheral surface is, of course.

Next, a plurality of guide blades 50 inclined spirally at a predetermined angle are provided on an outer circumferential surface of which the plurality of cutting rings 10 and the plurality of spacing rings 20 are sequentially assembled. Before installing the guide blade 50, it is preferable to form an inclined groove for inserting the guide blade 50 in the outer peripheral surface of the cutting ring assembly 180, but is not limited thereto. The guide blade 50 uses a long steel member, but is not limited thereto. As long as the insertion is made of aluminum or plastic in a suitable form and can block the space between the cutting ring 10 and the cutting ring 10 and the gap ring 20 in the longitudinal direction, it is possible. In the present embodiment, a pair of guide blades 50 are used, but the present invention is not limited thereto, and one guide blade or two or more guide blades may be installed.

The guide blade 50 installed as described above, when the cutting blade assembly 180 is rotated, the rice grain located above the spacing ring 20 to move the rice grain in the rotational direction of the support shaft 30, the rice grain is mixed. To be discharged to the outlet. Therefore, the inclination angle (b °) of each guide blade 50 is preferably about 15 ° so that the rice grain is smoothly transferred, but is not limited thereto. The inclination angle of the induction blade 50 may adjust the inclination angle of the induction blade 50 within the range of 0 ° to 45 ° according to the length, cutting degree, or yield of the cutting ring assembly 180.

In addition, the cutting ring assembly 180 may adjust the thickness of the spacing ring 20 or the size of the air passage channel 22 to reduce or increase air emissions along the direction in which the grain of rice is inverted and conveyed. For example, the thickness of the spacing ring 20 or the size of the air passage channel 22 may be made smaller in the direction in which the grain of rice moves, so that the amount of air supplied may decrease according to the direction in which the grain of rice is conveyed. In this case, the amount of rice bran generated by cutting decreases as the cutting progresses, so cooling or discharging of rice bran is possible even if the air supply is reduced, thereby saving energy by reducing the air supply.

Figure 10 is a schematic cross-sectional view showing another embodiment of the rice mill according to the present invention, Figure 11 is a perspective view of another embodiment of the cutting ring assembly shown in Figure 10, Figure 12 is an exploded view of the cutting ring assembly shown in Figure 11 Perspective view.

In another embodiment of the rice mill 200 according to the present invention, a hollow cylindrical drive shaft 220 is installed in the cutting ring assembly of another embodiment, compared to the rice mill 100 of the embodiment shown in FIG. There is a difference in that an air supply hole (not shown) is formed in the longitudinal direction of 220. A rice mill of such a structure is used for a small rice mill.

Referring to FIG. 11, the rice cleaning machine 200 according to another embodiment of the present invention includes a whitening chamber 211 on an upper portion of the main body. The hopper 212 is provided at an upper end of the whitening chamber 211, and the brown rice supplied through the hopper 212 is transferred to the brown rice processing rotating body 260. The white rice discharge port 213 is provided at the lower end of the other end of the whitening chamber 211 and discharges the rice grain which has been inverted by the brown rice processing rotary body 260 to the outside. The rice bran outlet 214 is installed at the lower portion of the brown rice processing rotating body 260, and discharges rice bran, which is rice bran removed from the grains of rice, when the brown rice is turned into white rice.

The drive shaft 220 has a hollow cylindrical shape and is rotatably installed at the center of the whitening chamber 211 so as to be inclined in the direction of the white rice outlet 213 from the hopper 212. The hollow of the drive shaft 220 is used as the air supply hole 218 for supplying air to the micromachined rotary body 260. The driven pulley 221 is installed at one end of the drive shaft 220. In addition, the outer peripheral surface of the drive shaft 220 is provided with a brown rice processing rotating body 260 for pressing and conveying the rice bran of the rice grain supplied through the hopper 212 toward the white rice outlet 213. And both ends of the drive shaft 220 is of course supported by the first bearing 215 and the second bearing (216). The minute adjuster 217 is installed at the other end of the whitening chamber 211. The cutting ring assembly 280 of another embodiment according to the present invention, in order to smoothly transfer the rice grains supplied through the hopper 212 toward the white rice outlet 213, from the hopper 212 toward the white rice outlet 213. Can be installed obliquely. At this time, the inclination angle of the driving shaft 220 is preferably about 15 °, but is not limited thereto. The inclination angle of the drive shaft 220 may be adjusted within the range of 5 ° to 30 ° according to the length, degree of precision, or yield.

In addition, the drive motor is mounted under the main body, the drive pulley is installed on the shaft of the drive motor. The belt is connected to the driven pulley 221 of the drive shaft 220 and the drive pulley of the drive motor, respectively. The screen 250 is installed at intervals on the outside of the brown rice processing rotating body 260, and discharges the rice bran removed during the milling to the outside. The microfabricated rotating body 260 includes a screw 270 and a cutting ring assembly 280.

Referring to FIG. 11, the cutting ring assembly 280 of another embodiment includes a plurality of cutting rings 70 and a plurality of spacing rings 80 assembled by being alternately fitted to the support shaft 90, and a cutting ring 70. And a fastening member 97 for fixing the spacer ring 80 to the support shaft 90, and two guide blades 50 coupled to the grooves formed to be inclined to the outer circumferential surfaces of the plurality of cutting ring assemblies.

In the present embodiment, a pair of guide blades 50 are used, but the present invention is not limited thereto, and one guide blade or two or more guide blades may be installed. When the cutting ring assembly 280 rotates, the guide blade 50 allows the rice grains located above the spacing ring 80 to move the rice grains in the rotational direction of the support shaft 90 so that the rice grains are mixed and fed to the outlet. do. Therefore, the inclination angle of each guide blade 50 is preferably about 15 ° so that the rice grains are smoothly conveyed, but is not limited thereto. The inclination angle of the induction blade 50 may adjust the inclination angle of the induction blade 50 within the range of 0 ° to 45 ° according to the length, degree of cutting, or yield of the cutting ring assembly 280 for the rice mill.

Referring to FIG. 12, the support shaft 90 is a cylindrical shape of the hollow 91, and the

key grooves

92 and 93 are formed in the longitudinal direction in the outer peripheral surface and the inner peripheral surface, respectively. The key groove formed on the outer circumferential surface of the support shaft 90 is called the outer key groove 92, and the key groove engaging protrusion 74 of the plurality of cutting rings 70 and the key groove of the spacer ring 80 are connected to the outer key groove 92. The protrusions 84 are sequentially fitted and engaged. Four outer keyways 92 according to the present invention are formed at intervals such as 90 °, but are not limited thereto. The key groove formed on the inner circumferential surface of the support shaft 90 is referred to as an inner key groove 93, and a key for coupling so that the power of the drive shaft 220 inserted into the support shaft 90 is transmitted is inserted. In addition, an air supply hole 94 may be formed in the support shaft 90. At least one air supply hole 94 is formed along the longitudinal direction of the support shaft 90 so as to communicate with the hollow 91. Therefore, the outside air supplied to the hollow 91 is discharged radially outward of the cutting ring assembly 280 through the air supply hole 94 and the cutout 82 of the spacing ring 80.

In addition, the plurality of spacing rings 80 are preferably assembled so that the cutouts 82 are cleaned at regular angles in the circumferential direction at the time of assembly so that air is evenly discharged in the circumferential direction. One end of the support shaft 90 is provided with a flange 95 for supporting the inserted cutting ring 70 and the spacing ring 80 so as not to fall out, and the other end is formed with a thread 96 on an outer circumferential surface thereof. The fastening member 97 has a thread 98 formed on the inner circumferential surface thereof, and is fastened with the thread 96 so that a plurality of cutting rings and gap rings alternately inserted into the other end of the support shaft 90 do not fall out. In some embodiments, threads are formed at both ends of the support shaft 90 and the fastening member 97 may be screwed at each end.

14 is a front view of another embodiment of the spacing ring shown in FIG. 12. Referring to FIG. 14, the cutting ring 70 of another embodiment of the present invention has a plurality of support parts 73 extending shorter toward the center than the cutting ring 10 of the embodiment shown in FIG. There is a difference in securing an air passage 75 in a narrow space between the outer circumferential surface of 90 and the inner circumferential surface of cutting ring 70.

The cutting ring 70 of another embodiment has a ring shape having a constant thickness, and a support shaft fitting hole 71 is formed through the center thereof. The cutting passage 72 is a channel shape in which the front and rear surfaces are connected to each other. The channel includes a bottom surface 72a and a pair of side surfaces 72b extending on both sides of the bottom surface 72a. The plurality of cutting passages 72 are formed on the outer circumferential surface of the cutting ring 70 at equal intervals, but may not be equal intervals in other embodiments. The rice bran is cut in contact with the edge (edge) of the bottom surface 72a of the channel and the edge (edge) of the side surface 72b when passing through the cutting passage 72. In particular, the cutting ring 70 of the present embodiment has an edge of the bottom surface 72a and an edge of both sides 72b when the grain of rice passes through the portion where the bottom surface 72a of the channel and the pair of side surfaces 72b meet. It is cut while contacting at the same time, and the cutting effect is excellent (see FIG. 15).

And the channel-shaped cutting passage 72 is the bottom surface 72a is a plane perpendicular to the plane passing through the center axis of the cutting ring 70, both sides 72b are at least 90 degrees to the bottom surface 72a. It is configured to meet with. Therefore, the rugby ball-shaped rice grains passing through the cutting passage 72 are not caught in the corners of the cutting passage 72 to increase the cutting effect. In addition, a ring between the cutting passage 72 and the cutting passage 72 so that rice grains passing through the space between the cutting ring 70 and the screen 250 contact the edges of the outer circumferential surface of the cutting ring 70 to effectively cut the rice bran. The outer circumferential surface of the surface is preferably formed in a plane perpendicular to the plane passing through the central axis of the cutting ring 70, like the bottom surface 72a.

In addition, the support portion 73 extends shortly from the inner circumferential surface of the cutting ring 70 to the support shaft fitting hole 71, and is provided in plurality at regular intervals along the circumferential direction of the cutting ring 70. In this embodiment, four are extended inward toward the center axis of the cutting ring 70, but is not limited thereto. And the key groove connecting projection 74 is formed at the end of each support portion 73, each key groove connecting projection 74 is fitted in the key groove formed on the corresponding support shaft (90). In the present embodiment, the key groove connecting protrusion 74 is formed at both ends of each support part 73, but is not limited thereto and may be formed at at least one end of each support part 73.

FIG. 15 is a cross-sectional view taken along line B-B of FIG. 10 and is an explanatory view showing a state in which the grain of rice is cut in the cutting ring assembly of another embodiment shown in FIG. The spacing ring 80 according to the present embodiment has a plurality of support portions 23 extending shorter toward the center than the spacing ring 20 of the embodiment shown in FIG. There is a difference in securing the cutout portion 82 in which the inner circumferential surface and the outer circumferential surface are opened to secure the.

The spacing ring 80 is a ring shape having a support shaft fitting hole 81 formed in the center and having a constant thickness. The cutout 82 is a portion open to allow the inner circumferential surface and the outer circumferential surface of the ring to communicate with the cutting ring assembly 280 and is used as a passage through which air supplied from the outside is discharged. A plurality of support portions 83 are disposed on the inner circumferential surface of the support shaft fitting holes 81 at regular intervals in the circumferential direction. Preferably four extend inward toward the central axis of the spacing ring 80, but is not limited thereto. In addition, the key groove connecting protrusion 84 for fitting to the outer key groove 92 formed on the support shaft 90 is formed at the end of each support portion 83, but may be formed only at one end of the support portion 83. have.

Embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

Claims

A main body having a hopper to which rice grains are supplied at one end and an outlet for discharging rice grains at the other end thereof;

A drive shaft rotatably installed on the main body so as to be inclined toward the outlet from the hopper;

A brown rice processing rotary body mounted on the drive shaft and pressed and transported in the direction of the outlet while removing rice bran of the rice grain supplied through the hopper;

A screen for separating only the rice bran removed and installed at intervals outside the brown rice processing rotating body,

Rice cleaning machine comprising a drive motor for transmitting a rotational force to the drive shaft.
The method of claim 1,

A rice cleaning machine having a plurality of air supply holes for supplying air in the direction of the brown rice processing rotating body at the end of the main body.
The method of claim 1,

The brown rice processing rotating body,

A screw having a hollow cylindrical shape to be mounted on the drive shaft, the blade being spirally installed on the outer circumferential surface, and having a plurality of through holes formed in the circumferential direction on the inner circumferential surface;

A support shaft having a hollow cylindrical shape so as to be installed adjacent to the screw, and having at least one key groove formed in a longitudinal direction on an inner circumferential surface and an outer circumferential surface thereof,

Ring shape of a certain thickness, having a plurality of cutting passages formed to connect both sides of the ring so that the rice bran is cut as the rice grains pass through the outer peripheral surface, the key groove connecting projection formed on the inner peripheral surface is fitted into the key groove formed on the outer peripheral surface of the support shaft A plurality of combined cutting rings,

A ring shape having a constant thickness and disposed between the plurality of cutting rings, the key groove connecting protrusion formed on an inner circumferential surface of the ring including a plurality of spacing rings coupled to the key groove formed on the outer circumferential surface of the support shaft;

The cutting passage has a channel shape extending to both sides of the ring,

And the channel includes a bottom surface and a pair of sides extending from both sides of the bottom surface.
The method of claim 3,

The bottom surface is a plane perpendicular to the plane passing through the central axis of the cutting ring,

Both sides are configured to meet with the bottom surface at an angle of more than 90 °.
The method of claim 4, wherein

An outer circumferential surface between each neighboring cutting passage is formed in a plane perpendicular to a plane passing through a central axis of the cutting ring.
The method according to any one of claims 3 to 5,

The cutting ring and the spacing ring support a ring so as to secure an air passage between the support shaft and the inner circumferential surface, and are disposed at regular intervals in the circumferential direction from the inner circumferential surface, and a plurality of support portions extending inwardly toward the center axis line;

The key groove connecting projection formed on at least one end of the plurality of support,

The rice mill introduced through the air supply hole of the main body is supplied to the air passage.
The method of claim 6,

In order to be installed at the outermost end of the at least one of the plurality of cutting ring is a ring shape of a constant thickness, and has a plurality of cutting passages formed to connect both sides of the ring so that the rice bran is cut while passing through the outer circumferential surface, And a secondary cutting ring in which the air passage is formed to communicate with the air passage of the cutting ring.
The method of claim 6,

And the spacing ring includes an air passage channel formed radially on one side of the ring to secure an air passage in which the outer and inner circumferential surfaces communicate on one side of the ring.
The method of claim 6,

The spacing ring comprises a cutout in which the inner circumferential surface and the outer circumferential surface of the ring are open so as to secure an air passage in which the outer and inner circumferential surfaces communicate.
The method of claim 6,

It is ring shape of constant thickness,

And a plurality of air rings disposed between the cutting ring and the spacing ring, the outer diameter of which is smaller than an inner circumferential surface of the spacing ring, and in which a keyway connecting protrusion formed on the inner circumferential surface is inserted into and coupled to the key groove formed on the outer circumferential surface of the support shaft.
The method of claim 1,

A rice mill having an inclination angle of the drive shaft in a range of 5 ° to 30 °.
The method according to any one of claims 3 to 5,

And at least one guide blade inserted and fixed to an outer circumferential surface of the plurality of cutting rings to be helically inclined at a predetermined angle along the longitudinal direction of the support shaft.
The method of claim 12,

A rice mill having an inclination angle of the guide blade in a range of 0 ° to 45 °.
The method of claim 3,

A rice mill having a gap for discharging air between the cutting ring and the spacing ring.
The method of claim 3,

The drive shaft is a hollow cylindrical shape and at least one air supply hole is formed along the longitudinal direction,

And the support shaft has at least one air supply hole formed at a position corresponding to the air supply hole of the drive shaft.