Rice milling apparatus having multi-stage milling function
The rice milling device addresses the inefficiencies in rice processing by using a multi-stage milling system with a grinder and adjustable mesh to produce various rice types, enhancing compatibility and efficiency across different cultivation regions.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LEE SEOK JIN
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-11
Smart Images
Figure KR2025011283_11062026_PF_FP_ABST
Abstract
Description
Rice milling device with multi-stage milling function
[0001] The present invention relates to a rice milling device having a multi-stage milling function, and more specifically, to a rice milling device having a multi-stage milling function capable of processing brown rice into various types of rice by milling it in multiple stages, and capable of processing and producing short-grain, medium-grain, and long-grain rice.
[0002] Generally, a rice milling device is a device that processes rice to produce rice, and rice is largely composed of a husk layer, a bran layer, a germ, and an endosperm.
[0003] The rice from which the pericarp, or the husk layer, has been removed is called brown rice, and the rice from which the rice bran, consisting of the seed coat and the aleurone layer in addition to the endosperm, has been removed is called white rice.
[0004] This white rice is produced through the processes of sorting, brown rice processing, stone removal, milling, and grading. The types of rice produced in this way are classified into short-grain, medium-grain, and long-grain varieties based on their grain shape, specifically their length.
[0005] In particular, short-grain rice is mainly produced in Northeast Asia, including Korea. Short-grain rice consists of short, plump, and almost round grains, and when cooked, it is soft and sticky, with the grains sticking together well.
[0006] Also, medium-grain rice is mainly produced in South Asia, and compared to short-grain rice, medium-grain rice has larger, longer, and plumper grains. When cooked, medium-grain rice is sticky and soft, and the grains tend to stick together well.
[0007] Long-grain rice is a type of rice mainly produced in Southeast Asia, commonly known as Annam rice. It has an elongated and fine grain shape, and when cooked, the grains scatter and are light in weight, resulting in a fluffy texture.
[0008] As such, since rice is classified into short-grain, medium-grain, and long-grain varieties depending on the cultivation region, there is a disadvantage that the rice milling equipment used to process the rice must also be configured differently for each cultivation region.
[0009] In other words, while rice milling equipment designed to produce short-grain rice has been developed and is used in Northeast Asia, where Korea is located, medium and long-grain rice is produced in South Asia and Southeast Asia. Consequently, there are many restrictions associated with exporting rice milling equipment to countries in these regions due to the inconvenience of having to modify the structure.
[0010]
[0011] (Prior Art Literature)
[0012] (Patent Literature)
[0013] Republic of Korea Registered Patent No. 10-1271643
[0014] Accordingly, the present invention has been devised to solve the problems of the prior art as described above, and aims to provide a rice milling device having a multi-stage milling function that can mill brown rice in multiple stages within a single milling device to process rice into various types and produce short-grain, medium-grain, and long-grain rice.
[0015] A rice milling device having a multi-stage rice milling function according to the present invention for achieving the above-mentioned purpose is a rice milling device comprising a rice milling unit that grinds the hulls of brown rice to process it into white rice, wherein the rice milling unit includes a grinder that grinds a portion of the seed coat of brown rice, an upper rice milling unit that grinds the seed coat remaining on the brown rice, and a lower rice milling unit that removes the rice bran from the rice from which the seed coat has been removed to process it into white rice, and the grinder, the upper rice milling unit, and the lower rice milling unit are provided to be stacked on the same frame.
[0016] In addition, the grinding machine includes a grinding roller rotatably installed inside, and a mesh installed spaced apart from the grinding roller to surround it, with diagonal slots formed on its surface. The mesh is provided as a double mesh consisting of an inner mesh and an outer mesh, each having a slot, and the inner mesh or the outer mesh can be configured to move from the other mesh to adjust the hole area of the slot.
[0017] In addition, an inner mesh flange protruding outwardly is formed at the end of the inner mesh, and an incision is formed at the end of the outer mesh so that the inner mesh flange is inserted through it by being cut in the circumferential direction. An outer mesh flange is formed in the incision by being bent outwardly to face the inner mesh flange, and an adjustment bolt is provided that is inserted through and engaged with the inner mesh flange and screw-fastened to the outer mesh flange. By tightening or loosening the adjustment bolt, the inner mesh can be moved circumferentially from the incision of the outer mesh to adjust the connected hole area of both slots.
[0018] In addition, a weld nut is fixedly provided on the outer mesh flange, and an adjustment bolt can be provided by penetrating both flanges and fastening it to the weld nut of the outer mesh flange.
[0019] In addition, an elastic member that elastically supports both flanges may be provided between the two flanges.
[0020] According to the rice milling device having a multi-stage rice milling function of the present invention, the milling operation for processing brown rice in a single rice milling device is performed multiple times in multiple stages to process rice into various types, and all types of rice, including short-grain, medium-grain, and long-grain varieties, can be produced by processing all types of rice according to cultivation regions.
[0021] FIG. 1 is a perspective view of a rice milling device according to the present invention.
[0022] FIG. 2 is a schematic diagram illustrating a grinding roller of a grinding machine according to the present invention.
[0023] Figure 3 is a combined diagram of a grinding roller and a mesh according to the present invention.
[0024] Figure 4 is an exploded view of a feed net and a grinding roller according to the present invention.
[0025] FIG. 5 is an operation diagram of a fast net with the slots adjusted according to the present invention.
[0026] Figure 6 is a diagram showing the state in which a grain of rice passes through the slot of the feed net adjusted according to Figure 5 and is discharged.
[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.
[0028] The terms used in this invention are defined considering their functions within the invention; however, since these may vary depending on the intentions or practices of the user or operator, the definitions of these terms should be interpreted in a meaning and concept consistent with the technical details of this invention.
[0029] In addition, the embodiments of the present invention are not intended to limit the scope of the rights of the present invention, but are merely exemplary details of the components presented in the claims of the present invention, and are embodiments that include components that are included in the technical concept throughout the specification of the present invention and can be substituted as equivalents for the components of the claims.
[0030] Additionally, optional terms in the following examples are used to distinguish one component from another, and the components are not limited by said terms.
[0031] Accordingly, in describing the present invention, detailed descriptions of related prior art that may unnecessarily obscure the essence of the invention are omitted.
[0032]
[0033] The attached drawings, FIGS. 1 to 6, are drawings illustrating a rice milling device having a multi-stage rice milling function according to the present invention and components configured therein.
[0034] As shown in FIG. 1, the milling device having a multi-stage milling function according to the present invention includes a milling unit (100) that grinds the hulls of brown rice that has been removed and processes them into white rice. The milling unit (100) includes a grinder (120) that grinds a portion of the seed coat of brown rice, an upper milling machine (150) that grinds the remaining seed coat of brown rice, and a lower milling machine (160) that removes the rice bran from the rice from which the seed coat has been removed and processes it into white rice.
[0035] In particular, the grinder (120), the upper rice miller (150), and the lower rice miller (160) are stacked vertically in the same frame and connected to each other as in FIG. 1.
[0036] A frame of this type is a base frame that unitizes a grinder (120) and upper and lower milling machines (150) (160) into a single device. This base frame includes a planar frame in which a plurality of frames are connected in a planar manner and a vertical frame that is positioned vertically upward on the planar frame. Casters are provided on the planar frame to allow the milling machine (100) to move smoothly.
[0037] In particular, by installing the elevator (110) vertically on one side of the base frame, the efficiency of the installation space can be improved, and accordingly, the overall volume of the milling unit (100) can be reduced.
[0038] In addition, the grinder (120) and the upper and lower rice millers (150) (160), which will be described later, are also provided in a stacked structure, which can contribute to the miniaturization of the rice milling unit (100), and brown rice is fed into the grinder (120), the upper rice miller (150), and the lower rice miller (160) in that order and processed sequentially.
[0039] Meanwhile, the grinder (120) is implemented as a box-shaped main body as in FIG. 1, and a hopper connected to an elevator (110) is provided on the upper part of the main body, and a discharge part for discharging ground rice is provided on the front of the main body.
[0040] And, as shown in FIGS. 2 and 3, the grinder (120) described above includes a grinding roller (130) rotatably installed inside, and a mesh (140) installed to surround the grinding roller (130) while spaced apart from the grinding roller (130), with diagonal slots (141a) (142a) formed on its surface.
[0041] These grinding rollers (130) are formed from round bars and are connected to a motor on one side of the grinder (120) by a belt.
[0042] In particular, the grinding roller (130) is formed by mixing a mixture of silicon carbide (SiC) and alumina (Al2O3) with clay, powder of feldspar, and a binder, and then performing a sintering process at 1300 to 1400°C. The surface particle size of the grinding roller (130) formed in this way is indicated by a number representing the number of particles that can fit within a length of 25.4 mm, and the starting number used was 36.
[0043] Additionally, as shown in FIGS. 3 to 5, the mesh (140) is provided as a double mesh comprising a hollow inner mesh (141) that surrounds the grinding roller (130) and a hollow outer mesh (142) that surrounds the inner mesh (141). The outer mesh (142) is fixedly coupled within the grinder (120), while the inner mesh (141) is coupled to move, i.e., rotate in the circumferential direction within the outer mesh (142) in a state of close contact without gap within the outer mesh (142).
[0044] And, on the surfaces of the inner mesh (141) and outer mesh (142) as described above, corresponding slots (141a) and (142a) are formed at an angle in a diagonal direction, and these inner mesh slots (141a) and outer mesh slots (142a) are formed with the same length and diameter.
[0045] Accordingly, by moving (rotating) the inner mesh (141) within the outer mesh (142), the connected hole area (147) of both slots (141a) (142a) can be adjusted, and between the outer mesh (142) and the inner mesh (141), a guide means may be provided to guide the movement of the inner mesh (141) in the circumferential direction while the inner mesh (141) is positioned within the outer mesh (142).
[0046] In particular, since the inner mesh slot (141a) and the outer mesh slot (142a) are formed to be inclined diagonally in the inner mesh (141) and outer mesh (142), respectively, as shown in FIG. 5 (a) and (b), as the inner mesh (141) moves in the circumferential direction within the outer mesh (142), the two slots (141a) (142a) are positioned in an overlapping state and then shift apart from each other, causing a phase difference and adjusting the length and width of the hole area (147) that communicates between the two slots (141a) (142a).
[0047] Thus, the length and width of the hole area (147) of both slots (141a) (142a) formed by the inner mesh slot (141a) and the outer mesh slot (142a) are adjusted as shown in drawings (a), (b), and (c) of FIG. 6, so that all types of rice—short-grain rice, medium-grain rice, and long-grain rice—can be processed and produced using a single rice milling device (100) according to the present invention, and accordingly, the compatibility of the rice milling device (100) is improved so that the rice milling device (100) can be used regardless of the rice cultivation region.
[0048] Here, the hatching area in drawings (a), (b), and (c) of FIG. 6 represents the overlapping hole area (147) of both slots (141a) (142a). Drawing (a) of FIG. 6 shows the state in which the hole area (147) of both slots (141a) (142a) is adjusted to match medium-grain rice, (b) shows the state in which the hole area (147) of both slots (141a) (142a) is adjusted to match short-grain rice, and (c) shows the state in which the hole area (147) of both slots (141a) (142a) is adjusted to match long-grain rice.
[0049] In particular, the adjustment of the hole area (147) exemplified above can more finely adjust the hole area (147) between the two slots (141a) (142a) according to the travel distance of the adjustment bolt (143) to be described later.
[0050] In addition, between the outer mesh (142) and the inner mesh (141) as described above, a driving means is provided to finely move the inner mesh (141) in the circumferential direction of the outer mesh (142) to adjust it.
[0051] As illustrated in FIGS. 4 and 5, the driving means is formed such that an inner mesh flange (141b) is formed at both ends of the inner mesh (141) and protrudes outwardly, and an incision (142c) is formed at the end of the outer mesh (142) and an outer mesh flange (142b) is formed at the incision (142c) and is bent outwardly to face the inner mesh flange (141b) of the inner mesh (141), and a weld nut (144) is fixed to the outer mesh flange (142b).
[0052] A adjusting bolt (143) is inserted through and connected to both flanges (141b) (142b) as described above. The head portion of the adjusting bolt (143) is formed to be sized to be in contact with and engaged with the inner mesh flange (141b), and the shaft portion of the adjusting bolt (143) is fastened to the weld nut (144) of the outer mesh flange (142b). As a result, both flanges (141b) (142b) are supported by the adjusting bolt (143) and are prevented from spreading outward.
[0053] Additionally, an elastic member (145) that elastically supports both flanges (141b) (142b) is provided between the two flanges (141b) (142b) to elastically support both flanges (141b) (142b), thereby preventing the two flanges (141b) (142b) from narrowing in any way.
[0054] At this time, the elastic member (145) may be provided as a compression coil spring, and in this case, as the shaft portion of the adjustment bolt (143) penetrates and connects to the elastic member (145), the elastic member (145) can maintain its position between the two flanges (141b) (142b).
[0055] Accordingly, as the adjustment bolt (143) provided as described above is fastened or loosened to the weld nut (144), the inner mesh (141) moves circumferentially within the outer mesh (142) as shown in FIGS. 5 and 6, thereby allowing the hole area (147) of both slots (141a) (142a) to be adjusted, and the movement of the inner mesh (141) is provided to be limited to the length of the cut portion (142c) formed in the outer mesh (142).
[0056] And, as described above, a polishing chamber (146) is formed between the inner mesh (141) surrounding the grinding roller (130) and the grinding roller (130) to which brown rice is introduced and ground, and this polishing chamber (146) is maintained at a distance of 10 mm, thereby maximizing the grinding efficiency of the brown rice while minimizing damage to the brown rice.
[0057] Additionally, the upper milling machine (150) is a device that processes the remaining seed coat from brown rice, from which the seed coat has been partially removed in the grinder (120), into rice, and the lower milling machine (160) is a device that processes the rice into white rice by removing the rice bran. The upper and lower milling machines (150) and (160) may be equipped with a mesh (140) inside, similar to that of the grinder (120) described above.
[0058] In addition, as shown in FIG. 1, an upper motor (151) is connected to the upper rice mill (150) by a belt, and a lower motor (161) is connected to the lower rice mill (160) by a belt. It is preferable that the upper rice mill (150) and the lower rice mill (160) be controlled to be driven independently by a control unit.
[0059]
[0060] The operation relationship of the rice milling device having a multi-stage rice milling function according to the present invention as described above is explained.
[0061] Brown rice from which foreign substances such as stones have been removed is fed into a hopper at the bottom of the elevator (110), and the fed brown rice is moved upwards on the elevator (110) and discharged, then fed into a grinder (120).
[0062] Brown rice fed into the grinder (120) flows into the polishing chamber (146) between the grinding roller (130) and the mesh (140), and the seed coat of the brown rice is partially ground and removed by the rotation of the grinding roller (130).
[0063] In this way, the brown rice with the seed coat partially removed is discharged through the connected hole area (147) of the two slots (141a) (142a) of the mesh (140) and fed into the upper rice mill (150).
[0064] At this time, the inner mesh (141) through which the rice passes is moved in the circumferential direction within the outer mesh (142) by fastening or loosening the adjustment bolt (143) that penetrates the inner mesh flange (141b) and the outer mesh flange (142b) to the weld nut (144) of the outer mesh flange (142b). Accordingly, the size of the connected hole area (147) can be adjusted as the two slots (141a) (142a) of the inner mesh (141) and the outer mesh (142) overlap, thereby enabling the production of short-grain rice, medium-grain rice, and long-grain rice all as shown in drawings (a), (b), and (c) of FIG. 6 with a single rice milling unit (100).
[0065] Meanwhile, the rice discharged from the grinder (120) with some of the seed coat removed as described above is fed into the upper rice mill (150), and in the upper rice mill (150), the remaining seed coat of the brown rice is removed and processed into rice, and the rice discharged from the upper rice mill (150) is fed into the lower rice mill (160) to finely grind and remove the rice bran from the rice, thereby processing it into white rice.
[0066] Accordingly, in a single milling unit (100) as described above, five-part milled rice and seven-part milled rice can be produced depending on the degree to which the seed coat surrounding the brown rice is ground, and white rice can be produced by grinding and removing the remaining seed coat as well as the rice bran surrounding the rice from the five-part milled rice and seven-part milled rice.
[0067] In addition, by adjusting the size of the connected hole area (147) between the two slots (141a) (142a) formed in the mesh (140), one milling unit (100) according to the present invention can be easily used regardless of the cultivation area.
[0068]
[0069] Although the present invention has been described in detail through specific embodiments, this is for the purpose of specifically explaining the invention, and the invention is not limited thereto. It is evident that modifications or improvements can be made by those skilled in the art within the technical scope of the present invention.
[0070] All simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims.
[0071]
[0072] (Explanation of symbols)
[0073] 100 : Rice Milling Unit 110 : Elevator
[0074] 120 : Grinding machine 130 : Grinding roller
[0075] 140 : Communication network 141 : Internal communication network
[0076] 141a : Inner mesh slot 141b : Inner mesh flange
[0077] 142 : Checkmate 142a : Checkmate slot
[0078] 142b : Outer mesh flange 142c : Cutout
[0079] 143 : Adjustment bolt 144 : Weld nut
[0080] 145 : Elastic member 146 : White chamber
[0081] 147 : Slot hole area 150, 160 : Rice mill
[0082] 151,161 : Motor
Claims
1. A rice milling device comprising a rice milling unit that grinds the hull of brown rice to process it into white rice, The milling unit includes a grinder that grinds off some of the seed coat of brown rice, an upper milling machine that grinds off the seed coat remaining on the brown rice, and a lower milling machine that removes the bran from the hulled rice to process it into white rice. A milling device in which a grinder, an upper milling machine, and a lower milling machine are stacked on the same frame.
2. In Claim 1, The grinding machine includes a grinding roller rotatably installed inside it, and a mesh installed spaced apart from the grinding roller to surround it, with diagonal slots formed on its surface. A milling device comprising a double mesh of inner and outer meshes each having a slot, wherein the inner mesh or outer mesh can be moved from the other mesh to adjust the hole area of the slot.
3. In Claim 2, An inner mesh flange protruding outwardly is formed at the end of the inner mesh, and An incision is formed at the end of the outer mesh so as to be cut in a circumferential direction to allow the inner mesh flange to be inserted through it, and an outer mesh flange is formed at the incision by being bent outward to face the inner mesh flange. An adjustment bolt is provided that penetrates and engages the inner mesh flange of the two flanges while being screw-fastened to the outer mesh flange, A milling device that adjusts the connected hole area of both slots by moving the inner mesh in a circumferential direction from the cut portion of the outer mesh as the adjustment bolt is tightened or loosened.
4. In Claim 3, A milling device in which a weld nut is fixedly provided on the outer mesh flange, and an adjustment bolt is connected through both flanges and fastened to the weld nut of the outer mesh flange.
5. In Claim 3, A milling device having an elastic member between the two flanges that elastically supports the two flanges.