Cutting type dry rice washing machine

Abstract

The cutting-type dry rice washer according to the present invention includes a hopper (220) into which polished rice is introduced, a transfer screw (260) for transferring the polished rice introduced from the hopper (220), and a no-wash rice processing unit (280) for finely cutting the surface of the polished rice transferred from the transfer screw (260) and separating and removing residual rice bran adhering to the surface of the polished rice, The device is expected to provide a cutting-type dry rice washer that can reliably remove residual rice bran while maintaining an appropriate amount of surface cutting of the white rice during the no-wash rice processing process, and prevent white rice fed into the previous and subsequent no-wash rice processing processes from mixing, thereby improving the quality of the processed no-wash rice.It is also expected to provide a cutting-type dry rice washer that can increase the efficiency of no-wash rice processing by simplifying the equipment configuration as it does not use abrasives or adsorbents.

Description

[Technical Field]

[0001] The present invention relates to a rice washer that processes regular polished rice into no-wash rice. More specifically, the present invention relates to a cutting-type dry rice washer that processes polished rice into no-wash rice by smoothing the surface of the polished rice using a metal mesh combined with a cutting roller and separating and discharging residual rice bran adhering to the surface of the polished rice using air pressure. [Background technology]

[0002] The rice milling method currently used at rice processing plants involves arranging a grinding mill and a friction mill in a linked system to process the rice into white rice, which then goes through a sorting process and is polished to remove the remaining rice bran. However, this method is unable to completely remove the remaining rice bran from the surface of the white rice, which leads to problems such as a decrease in the shelf life of the white rice, a deterioration in flavor, the inconvenience of consumers having to wash the rice several times before cooking, and environmental pollution caused by the wastewater from the rice washing process.

[0003] To solve these problems, the use of no-wash rice is increasing, and as a result, the use of no-wash rice processing machines is also expanding.

[0004] In this regard, Korean Patent Publication No. 10-2000-0017015 (published March 25, 2000), entitled "Clean Rice Manufacturing Apparatus and Manufacturing Method," discloses a dry-type clean rice manufacturing apparatus that can produce clean rice without the need for rice polishing, such as washing the rice before cooking. The apparatus uses a cleaning material made of a fibrous material that absorbs or adsorbs oils and fats, and a pressurizing material that purifies the raw polished rice through the cleaning material. However, this apparatus has a complex configuration, including a dispersion unit, a stirring unit, and a wind-powered separator that filter and separate the polished rice, pressurizing material, and cleaning material in a sorting device, discharges the clean rice, and removes fine particles such as rice bran that adhere to the rice grains. The additional cleaning material and pressurizing material make the apparatus difficult to maintain and increase costs.

[0005] Meanwhile, Korean Patent Publication No. 10-1105968 (published January 17, 2012), entitled "Method and Apparatus for Producing Wash-Free Rice," discloses an apparatus for producing wash-free rice, characterized by comprising an agitator (1) that peels the bran layer from polished rice and a separator (6) that separates the polished rice and bran layer peeled by the agitator (1). This apparatus removes the bran from the polished rice by repeatedly striking polished rice against a hard object to cause the bran layer remaining on the polished rice to adhere to the hard object, and then rubbing the bran layer adhered to the hard object against a group of polished rice grains to peel it off from the hard object. However, this apparatus has problems such as low efficiency in producing wash-free rice, and a complex configuration due to the independent agitator and separator, making it difficult to manufacture and maintain. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention is intended to solve the above-mentioned problems, and aims to provide a cutting-type dry rice washer that does not require intermediaries such as abrasives or adsorbents, has a simple equipment configuration, and improves the processing efficiency of no-wash rice. [Means for solving the problem]

[0007] The cutting type dry rice washer according to the present invention has the following features.

[0008] The cutting-type dry rice washer according to the present invention is a cutting-type dry rice washer including a polished rice feeding hopper (220) into which polished rice is fed, a transfer screw (260) for transferring the polished rice fed from the polished rice feeding hopper (220), and a no-wash rice processing unit (280) for removing residual rice bran adhering to the surface of the polished rice transferred from the transfer screw (260), The no-wash rice processing unit (280) includes a cutting roller (160) and a wire mesh (180), The cutting roller (160) a support shaft (110) coupled to a coupling portion of the drive shaft (250); a plurality of cutting rings (120) and spacing rings (130) alternately inserted on the outer circumferential surface of the support shaft (110); a fastening member (150) fastened to the end of the support shaft (110) to prevent the cutting ring (120) and the spacing ring (130) from falling off; The cutting ring (120) and the spacing ring (130) are inserted into the outer circumferential surface of the support shaft (110) to form a cylindrical member, and the cutting ring (120) and the spacing ring (130) are attached to the surface of the cylindrical member, and the conveying guide (140) is attached at a predetermined inclination angle with respect to the axial direction of the cylindrical member.

[0009] The transfer guide 140 is formed by welding a metal member having a length that covers the entire length of the cylindrical member.

[0010] The transfer guide (140) is formed by forming a groove on the surface of the cylindrical member, and the metal member is inserted into the groove and joined together, and is characterized in that the outer surface of the joined metal member protrudes outward from the upper surface of the cutting teeth (123) of the cutting ring (120) and is configured so as not to come into contact with the inner surface of the wire mesh (180).

[0011] The transfer guides (140) are arranged at positions facing each other in the diameter direction of the cylindrical member, with a total of two or four of them being installed.

[0012] The cutting passages (122) formed between the cutting teeth (123) of the cutting ring (120) are formed in an arc shape.

[0013] A large number of rotation guide vanes (133) are formed at equal intervals along the circumferential direction over the entire outer circumferential surface of the spacing ring (130).

[0014] The wire mesh (180) includes a first-layer wire mesh (181) and a second-layer wire mesh (182), and the first-layer wire mesh (181) has a number of slit-type through holes formed on its outer surface, and a number of cutting guides (183) are attached to its inner surface at equal intervals along the circumferential direction, and the second-layer wire mesh (182) has a number of circular through holes formed on its outer surface, and the lengths of the first-layer wire mesh (181) and the second-layer wire mesh (182) are formed in a ratio of 1:2 to 1:4.

[0015] The first and second wire meshes (181, 182) are either integrally formed or detachably connected to each other. [Effects of the Invention]

[0016] The cutting-type dry rice washer of the present invention processes polished rice to produce no-wash rice without using any intermediates such as abrasives or adsorbents, which reduces operation and maintenance costs, eliminates the need for intermediates such as mixing, stirring, and separating, simplifies the configuration and production process, reduces manufacturing costs, and is expected to improve processing efficiency.

[0017] Furthermore, since the cutting passage (122) of the cutting ring (120) of the present invention is configured in an arc shape, the transportation of polished rice within the no-wash rice processing unit (280) is smooth, and the surface of the polished rice is cut evenly, which is expected to improve the quality of the no-wash rice.

[0018] In addition, the formation of numerous rotary guide blades (133) on the outer periphery of the spacing ring (130) promotes the transfer of rice, and the transfer guide (140) promotes the separation of residual rice bran. This not only improves the efficiency of no-wash rice processing by smoothing the transfer of rice, but also has the effect of completely discharging polished rice without leaving any remaining polished rice in the no-wash rice processing unit (280) at the end of the no-wash rice processing operation. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a block diagram showing the configuration of a conventional clean rice manufacturing device and manufacturing method. [Figure 2]FIG. 1 is a partial cross-sectional view of the front of a conventional rinse-free rice manufacturing device. [Figure 3] 1 is a cross-sectional view showing a schematic configuration of a cutting-type dry rice washer according to the present invention. [Figure 4] 1 is an exploded perspective view of a wash-free rice processing unit according to a first embodiment of the present invention. FIG. [Figure 5] FIG. 1 is a front view of a cutting ring according to the present invention. [Figure 6] FIG. 1 is a front view of a spacing ring according to the present invention. [Figure 7] FIG. 10 is an exploded perspective view of a wash-free rice processing unit according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, a cutting type dry rice washer according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

[0021] In the following, descriptions of conventional well-known matters will be omitted or briefly described in order to clarify the gist of the present invention.

[0022] As shown in FIG. 3, the cutting-type dry rice washer according to the present invention comprises a main body housing (210) that forms the outer shape of the rice washer (200), a no-wash rice processing unit (280) that is installed inside the main body housing (210) and processes polished rice into no-wash rice, a polished rice feeding hopper (220) that is installed on the upper side of the main body housing (210) and feeds polished rice into the main body housing (210), and a transfer unit (230) that transfers polished rice fed from the polished rice feeding hopper (220) to one end of the no-wash rice processing unit (280). The system comprises a screw (260), a hollow drive shaft (250) that supplies driving force to the transfer screw (260), a no-wash rice outlet (230) formed at the other end of the no-wash rice processing unit (280) through which the no-wash rice is discharged, a rice bran outlet (240) formed in the lower main body housing (210) of the no-wash rice processing unit (280) through which rice bran and air are discharged, and a blower (not shown) that supplies external air from the outer end of the drive shaft (250) to the hollow portion of the drive shaft (250).

[0023] The drive shaft (250) is a substantially hollow cylindrical member, and its outer periphery is formed with a drive unit, a transfer screw (260), and a coupling unit, in that order, from one end (the end connected to the blower) to the other end (the end opposite the one end). The one end is installed so as to be exposed to the outside through a through-hole formed on one side of the main housing (210), and the drive unit has an electric pulley (270) mounted on its outer periphery for supplying power from the outside. Bearings (290) are installed on both sides of the electric pulley (270) to rotatably support the drive shaft (250). When power is supplied from the outside through the electric pulley (270), the drive shaft (250) rotates, thereby rotating the transfer screw (260).

[0024] The transfer screw (260) extends from the lower side of the polished rice input hopper (220) to one end of the no-wash rice processing unit (280) and is a component that transfers the input polished rice to the no-wash rice processing unit (280). A spiral transfer blade is formed on the outer periphery of a hollow cylindrical member, and the transfer screw (260) is inserted into and fixed to the outer periphery of the drive shaft (250).

[0025] The connecting portion is formed by extending from one end of the transfer screw 260, and a plurality of air supply holes for discharging air from the hollow portion to the outside are formed through the side wall, and the other end is sealed to prevent air from leaking out.

[0026] As shown in Figure 4, the no-wash rice processing unit (280) is composed of a cutting roller (160) and a wire mesh (180). The cutting roller (160) is composed of a support shaft (110) inserted into the outer periphery of a joint formed at the other end of the drive shaft (250), a number of cutting rings (120) and spacing rings (130) alternately inserted around the outer periphery of the support shaft (110), a transfer guide (140) installed diagonally across the cutting rings (120) and spacing rings (130) connected to the support shaft (110), and a fastening member (150) connected to the end of the support shaft (110) to prevent the cutting rings (120) or spacing rings (130) from falling off.

[0027] The support shaft (110) is a hollow cylindrical metal member, and as shown in FIG. 4, a support flange (115) is formed at one end thereof to support the cutting ring (120) and spacing ring (130) that are inserted around the outer periphery of the support shaft (110). A male thread portion (116) is formed on the outer periphery of the other end thereof, and is fastened to the female thread portion (151) of the fastening member (150). Three to six rows of air supply holes (114) are formed in the side wall of the support shaft (110) at equal intervals along the circumferential direction, and the air supply holes are formed elongated along the axial direction of the support shaft (110). Each row is composed of two to three through holes, and the positions, shapes, dimensions, and numbers of the air supply holes formed in the coupling portion of the drive shaft (250) are the same. The support shaft (110) is inserted into the coupling part and coupled so that the air supply hole (114) and the air supply hole of the coupling part are aligned in position, whereby external air supplied through the hollow part of the drive shaft (250) is blown out to blow away and remove the rice bran adhering to the surface of the polished rice.

[0028] 4 and 5, the cutting ring 120 is an annular member formed by machining a flat metal plate member, and has a circular support shaft insertion hole 121 formed inside thereof. A plurality of key groove coupling protrusions 124 are formed at equal intervals on the inner surface of the support shaft insertion hole 121.

[0029] In addition, a large number of cutting teeth 123 are formed at equal intervals around the entire outer circumferential surface of the cutting ring 120, and cutting passages 122 are formed between the cutting teeth 123. If the roots of the cutting teeth 123 are formed angularly, the rice will not flow smoothly during processing, which may lead to uneven friction and processing pressure and increase the rate of broken and crushed rice, so the cutting passages 122 are formed in an arc shape.

[0030] The cutting ring (120) is made of high carbon steel or stainless steel, which has excellent hardness, strength, and wear resistance, and has a thickness of 5 mm. The outer diameter is determined in consideration of the rotation speed of the drive shaft (250), and is configured so that the circumferential speed of the outer periphery of the cutting ring (120) is 4.0 to 4.6 m / s. This value was calculated through an experiment taking into consideration quality indicators such as whiteness, turbidity, and the percentage of broken rice of the produced no-wash rice.

[0031] 4 and 6, the spacing ring 130 is an annular member formed by processing a flat metal plate member, and has a circular support shaft insertion hole 131 formed inside thereof. In addition, a plurality of key groove coupling protrusions 134 are formed at equal intervals on the inner surface of the support shaft insertion hole 131.

[0032] Furthermore, a notch (132) is formed by cutting away a portion of the annular member, and a large number of rotation guide vanes (133) are formed at equal intervals along the circumferential direction on the entire outer circumferential surface of the spacer ring (130). This prevents the polished rice from slipping on the outer circumferential surface of the spacer ring (130) during processing, and ensures smooth flow.

[0033] The thickness of the spacing ring (130) is 5 to 11 mm, and the outer diameter and material are the same as those of the cutting ring (120).

[0034] Then, the cutting ring (120) or the spacing ring (130) is inserted so that one side thereof contacts the support flange (115) of the support shaft (110), and the keyway coupling protrusions (124, 134) are coupled to the outer keyway (112) of the support shaft (110). Then, the cutting ring (120) and the spacing ring (130) are inserted in the same manner, but so that the cutting rings (120) and the spacing rings (130) are alternately arranged, and after filling the male thread portion (116) of the support shaft (110), the female thread portion (151) of the fastening member (150) is fastened to the male thread portion (116).

[0035] In addition, a transfer guide (140) made of a metal member having a length that covers the entire length of the cylindrical member is attached by welding to the outer periphery of the cylindrical shape formed by inserting the cutting ring (120) and spacing ring (130) into the support shaft (110). The transfer guide (140) is disposed at an inclination angle of 0° to 20° with respect to the axial direction of the cylindrical shape and is disposed at an inclination angle of 10° or more. If the inclination angle is 10° or more, the transfer guide (140) may be divided into two parts and disposed separately with the same inclination angle. The transfer guide (140) not only facilitates the transfer of polished rice, but also comes into contact with the polished rice during transfer to remove residual rice bran from the surface of the polished rice.

[0036] In addition, a groove is formed in advance where the transfer guide 140 is to be attached, and the transfer guide 140 is attached with a portion of it inserted. The outer surface of the attached transfer guide 140 is configured to protrude above the upper surface of the cutting teeth 123 of the cutting ring 120, and not to come into contact with the inner surface of the wire mesh 180. The cutting roller 160 is completed by installing two or four transfer guides 140, one at each diametrically opposite position on the cylindrical member.

[0037] At this time, four to eight keyway coupling protrusions (124, 134) of the cutting ring (120) and the spacing ring (130) are formed at equal intervals along the inner peripheral surfaces of the cutting ring (120) and the spacing ring (130). When the cutting ring (120) and the spacing ring (130) are inserted into the support shaft (110), the outer peripheral surface of the support shaft (110) and the inner peripheral surfaces of the cutting ring (120) and the spacing ring (130) form concentric circles. The keyway coupling protrusions (124, 134) of the cutting ring (120) and the spacing ring (130) are formed higher than the depth of the outer keyway (112) of the support shaft (110), and air passages (125, 135) are formed between the outer peripheral surface of the support shaft (110) and the inner peripheral surfaces of the cutting ring (120) and the spacing ring (130). External air blown out through the air supply hole 114 of the support shaft 110 flows through the air passages 125, 135 and is discharged through the notch 132 of the spacing ring 130.

[0038] As shown in FIG. 4, the wire mesh (180) is a hollow cylindrical metal member, and is formed in the order of a first-layer wire mesh (181), a second-layer wire mesh (182), and a connecting flange (186) from one side (the transfer screw (260) side).

[0039] The single-stage wire mesh (181) is made by forming 1.1 mm wide and 15 mm long slit holes in a 1.2 mm thick metal plate such as stainless steel, except for both ends, to prevent rice grains from passing through, and setting the spacing between adjacent slit holes to 1.5 to 3.0 mm, and then rolling it into a cylindrical shape. A plurality of cutting guides (183) are installed on the inner circumferential surface at equal intervals along the circumferential direction of the cylinder, and 4 to 8 reinforcing ribs can be attached to the outer circumferential surface at equal intervals along the circumferential direction, covering the entire length.

[0040] The slit-shaped holes are arranged at an angle of 20° to the axial direction of the wire mesh 180. The closer the interval between adjacent slit-shaped holes, the greater the amount of cutting, so adjustments must be made to prevent excessive processing of the polished rice.

[0041] The cutting guide (183) is a component that works in conjunction with the cutting roller (160) to finely scrape the surface of the input polished rice to make the surface smooth, and the cutting guide (183) has the effect of improving the efficiency of cutting polished rice. The cutting guide (183) is attached by welding 4 to 8 strips of steel plate having a thickness of 0.7 to 1.2 mm and a width of 8 to 12 mm to the inner peripheral surface of the wire mesh (180) so that the strips are positioned at an inclination angle of 0 to 20 degrees with respect to the axial direction of the wire mesh (180). The length of the cutting guide (183) is configured to cover the entire length of the first-stage wire mesh (181).

[0042] The two-tiered wire mesh (182) is made by forming a number of circular through-holes, each with a diameter large enough to prevent rice grains from passing through, at equal intervals along two diagonal lines on a metal plate, except for both ends, and then rolling it into a cylindrical shape. Circular reinforcing ribs (185) are attached to the outer periphery at regular intervals along the length, and rod-shaped reinforcing ribs are also attached at regular intervals around the circumference. The connecting flange (186) has through-holes for connecting the wire mesh (180) to a frame inside the main housing (210) with bolts and nuts.

[0043] The material, thickness, and outer diameter of the second-tiered wire mesh (182) are the same as those of the first-tiered wire mesh (181). However, the length ratio of the first-tiered wire mesh (181) and the second-tiered wire mesh (182) is 1:2 to 1:4. The first-tiered wire mesh (181) is configured to finely scrape the surface of the polished rice, and the second-tiered wire mesh (182) is configured to rub the polished rice against its inner circumferential surface to separate the residual rice bran adhering to the surface of the polished rice, so the second-tiered wire mesh (182) is formed to be relatively long, as described above.

[0044] The wire mesh (180) is formed by attaching a reinforcing material to one end of the first-stage wire mesh (181) by a method such as welding, and by welding and joining the other end of the first-stage wire mesh (181) to the end of the opposing second-stage wire mesh (182) to form a boundary portion (184).

[0045] On the other hand, in the second embodiment of the present invention, as shown in Figure 7, the boundary portion (184) of the wire mesh (180) is not formed by welding, but rather flanges with connecting through holes are provided at the opposing portions of the first-stage wire mesh (181) and the second-stage wire mesh (182), and the wire meshes are connected with bolts and nuts.

[0046] This is because the cutting guide 183 attached to the inner peripheral surface of the first-stage wire mesh 181 wears out relatively quickly, so by making it possible to replace only the first-stage wire mesh 181, the maintenance costs of the equipment can be reduced. In this case, the other configurations of the wire mesh 180 are the same as those in the first embodiment.

[0047] The installation process and operation of the no-rinse rice processing unit 280 are as follows.

[0048] First, the cutting roller (160) is inserted into the outer periphery of the coupling part formed in contact with the end of the transfer screw (260), which is formed on the outer periphery of the drive shaft (250) or manufactured as a separate component and coupled to the outer periphery of the drive shaft (250). Then, the inner key groove (113) formed on the support shaft (110) of the cutting roller (160) is aligned with the key groove formed on the outer periphery of the coupling part, and then a key is inserted to couple them together.

[0049] Then, the wire mesh (180) is positioned so that the cutting roller (160) is inserted into the hollow portion of the wire mesh (180), and the connecting flange (186) of the wire mesh (180) is connected to the frame inside the main body housing (210) using bolts and nuts, thereby installing the no-wash rice processing unit (280). At this time, the outer circumferential surface of the cutting roller (160) and the inner circumferential surface of the wire mesh (180) form concentric circles with each other.

[0050] The process of processing the no-wash rice using the cutting type dry rice washer including the no-wash rice processing unit 280 is carried out as follows.

[0051] First, when the drive shaft (250) is driven with polished rice being put into the polished rice putting hopper (220), or when the drive shaft (250) is driven first and then polished rice is put into the polished rice putting hopper (220), the put-in polished rice is transferred by the transfer screw (260) and flows into the space between the outer circumferential surface of the cutting roller (160) and the inner circumferential surface of the wire mesh (180) of the no-wash rice processing unit (280).

[0052] The milled rice that flows in is rotated by the cutting teeth (123) of the cutting ring (120) and the rotation guide blades (133) of the spacing ring (130), its transfer is promoted by the transfer guide (140), and it is discharged to the milled rice discharge port (230) through the first and second tier wire meshes (181 and 182).

[0053] At this time, the surface of the polished rice is finely scraped and smoothed by the action of the cutting teeth (123) and the cutting guide (183) as it passes through the first-tier wire mesh (181).Then, as the polished rice passes through the second-tier wire mesh (182), it is pressed by the cutting teeth (123), rubbed against the inner surface of the second-tier wire mesh (182), and comes into contact with the transfer guide (140), whereby the remaining rice bran is separated from the surface of the polished rice.

[0054] Meanwhile, external air flows into the hollow portion of the drive shaft (250) from a blower (not shown) at a speed of 25 to 45 m / s. The external air passes through the hollow portion, is discharged through the air supply hole in the joint and the air supply hole (114) in the support shaft (110), flows through the supply passages (125, 135), and is ejected through the notch (132) in the spacing ring (130). As a result, the residual rice bran separated from the polished rice transported along the inner circumferential surface of the wire mesh (180) is ejected to the outside of the no-wash rice processing unit (280) through the slit-shaped or circular holes formed in the wire mesh (180).

[0055] The rice bran sprayed out of the no-wash rice processing unit (280) as described above is discharged together with air to the outside of the rice washer (200) through the rice bran discharge port (240) formed in the lower part of the main body housing (210).

[0056] Meanwhile, by further providing a dust collector at the rice bran discharge port (240), it is possible to easily collect the rice bran and improve the working environment.

[0057] This type of cutting-type dry rice washer is expected to have the following effects:

[0058] First, the rice washer of the present invention processes polished rice to produce no-wash rice without using any intermediates such as abrasives or adsorbents, thereby reducing operation and maintenance costs. In addition, because it does not require the processes of mixing, stirring, and separating intermediates, the configuration and production process are simplified, reducing manufacturing costs and improving processing efficiency.

[0059] Furthermore, since the cutting passage (122) of the cutting ring (120) of the present invention is configured in an arc shape, the rice is transported smoothly within the no-wash rice processing unit (280), and the surface of the rice is cut evenly, which is expected to improve the quality of the no-wash rice.

[0060] In addition, the spacing ring (130) is formed with a number of rotating guide blades (133), which promote the transfer of rice, and the transfer guide (140) promotes the separation of residual rice bran. Furthermore, the smooth transfer of rice improves the processing efficiency of no-wash rice, and at the end of the no-wash rice processing work, no white rice remains in the no-wash rice processing unit, and it is completely discharged.

[0061] The present invention is not limited to the specific preferred embodiments described above, and it goes without saying that various modifications can be made by a person having ordinary skill in the art to which the invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications are intended to be included within the scope of the claims. [Explanation of symbols]

[0062] 110: Support shaft 111: Hollow 112: Outer keyway 113: Internal keyway 114: Air supply hole 115: Support flange 116: Male thread 120: Cutting ring 121: Support shaft insertion hole 122: Cutting passage 123: Cutting teeth 124: Keyway coupling protrusion 125: Air passage 130: Spacing ring 131: Support shaft insertion hole 132: Notch 133: Rotating guide vanes 134: Keyway coupling protrusion 135: Air passage 140: Transport Guidance 150: Fastening member 151: Female thread 160: Cutting roller 180: Wire Mesh 181: 1-tier wire mesh 182: Two-tier wire mesh 183: Cutting guide 184: Boundary 185: Reinforcement rib 186: Joint flange 200: Rice washing machine 210: Main body housing 220: White rice feeding hopper 230: Wash-free rice outlet 240: Rice bran outlet 250: Drive shaft 260: Transfer screw 270: Electric Pulley 280: No-wash rice processing unit 290: Bearing

Claims

1. A cutting-type dry rice washer including a polished rice input hopper (220) into which polished rice is input, a transfer screw (260) that transfers the polished rice input from the polished rice input hopper (220), a hollow drive shaft (250) that provides driving force to the transfer screw (260), and a no-wash rice processing unit (280) that removes residual rice bran adhering to the surface of the polished rice transferred from the transfer screw (260), The no-wash rice processing unit (280) includes a cutting roller (160) and a wire mesh (180), The cutting roller (160) comprises a support shaft (110) connected to a connection portion of a drive shaft (250); a number of cutting rings (120) and spacing rings (130) alternately inserted on the outer circumferential surface of the support shaft (110); a fastening member (150) fastened to the end of the support shaft (110) to prevent the cutting ring (120) and the spacing ring (130) from falling off; a transfer guide (140) attached to the surface of a cylindrical member formed by inserting a cutting ring (120) and a spacing ring (130) onto the outer circumferential surface of the support shaft (110) at a predetermined inclination angle with respect to the axial direction of the cylindrical member; The drive shaft (250) further includes a blower for supplying external air to the hollow portion thereof, The transfer guide (140) is formed by welding a metal member having a length that covers the entire length of the cylindrical member, The transfer guide (140) forms a groove on the surface of the cylindrical member, The cutting type dry rice washer is characterized in that the metal member is inserted into the groove and joined together, and the outer surface of the joined metal member protrudes outward from the upper surface of the cutting teeth (123) of the cutting ring (120) and does not come into contact with the inner peripheral surface of the wire mesh (180).

2. 2. The cutting-type dry rice washer according to claim 1, wherein the transfer guides (140) are arranged at diametrically opposite positions on the cylindrical member, with a total of two or four transfer guides (140).

3. 2. The cutting type dry rice washer according to claim 1, wherein the cutting passages (122) formed between the cutting teeth (123) of the cutting ring (120) are formed in an arc shape.

4. 2. The cutting type dry rice washer according to claim 1, wherein a number of rotation guide vanes (133) are formed at equal intervals along the circumferential direction over the entire outer circumferential surface of the spacing ring (130).

5. The wire mesh (180) includes a first-stage wire mesh (181) and a second-stage wire mesh (182), A number of slit-type through holes are formed on the outer peripheral surface of the first-stage wire mesh (181), and a number of cutting guides (183) are attached to the inner peripheral surface thereof at equal intervals along the circumferential direction. A number of circular through holes are formed on the outer periphery of the two-tiered wire mesh (182), 2. The cutting type dry rice washer according to claim 1, wherein the length ratio of the first and second wire meshes is 1:2 to 1:

4.

6. 6. The cut-type dry rice washer according to claim 5, wherein the first-stage wire mesh (181) and the second-stage wire mesh (182) are integrally formed.

7. 6. The cutting type dry rice washer according to claim 5, wherein the first and second wire meshes (181, 182) are detachably coupled to each other.

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