JP2011005468A - Rice husking and milling machine - Google Patents

Abstract

The present invention provides a rice milling machine capable of preventing reduction in the removal rate in the removal unit and damage to the removal unit and improving the sorting accuracy of the rough sorting.
A rice cake hopper that receives raw rice cake, a detaching unit that detaches the raw material rice cake received by the rice hopper, a wind selection unit that wind-selects the crushed rice that has been evacuated in the detaching portion, A rice milling machine equipped with a milled rice mill that receives milled brown rice that has been wind-selected by the wind-sorting unit in the machine frame, and between the straw hopper and the detaching part, An oscillating-type contaminant removal unit is provided for removing contaminants larger than the contaminants mixed in, and an opening for discharging the contaminants removed by the contaminant removal unit is provided in the machine frame. Since it has been drilled, foreign matter can be efficiently removed before supplying the raw material waste to the detachment part, preventing a reduction in the detachment rate in the detachment part, damage to the detachment part, and rough sorting. Sorting accuracy can be improved.
[Selection] Figure 2

Description

  The present invention relates to a rice milling machine, and more particularly, to a foreign substance removing unit that removes straw scraps, pebbles and the like mixed in a raw material koji.

  For example, those disclosed in Patent Literature 1 and Patent Literature 2 are known as a dust removal device for a rice milling machine having both a detaching function and a rice milling function. In the conventional dust removing device of the rice milling machine, the dust removing device is arranged in an intermediate process (connecting portion) between the removing portion and the rice polishing portion. That is, in the conventional dust removing device of the rice milling machine, the raw rice cake and the straw waste mixed therein are supplied directly from the straw tank to the detaching section. Lightly squeezed to make it soft and kneaded, and then the lighter and lighter straw scraps are discharged out of the machine along with the rice husks by the wind selector, while the heavy heavy straw scraps are removed. It is to be removed by the device. In other words, the purpose of disposing the contaminant removal device at the connecting part between the brewing part and the rice milling part is to prevent the flow of straw waste into the rice milling part, rather than to prevent clogging of the brewing part. The focus is on preventing unevenness and clogging.

  However, large and small stones and large and small pieces of wood are scattered in the farm field due to recent arable land development projects and flooding of waterways due to typhoons and heavy rain disasters. In addition, in recent self-propelled combine harvesters that harvest rice while performing self-propelled, and perform threshing processing of straw and straw cutting processing, A mechanism to reduce the area of hand cutting is also provided, and the harvesting ability has been greatly improved. For this reason, there is a high possibility that pebbles having a particle diameter of 5 mm or more and straw scraps having a length of 30 mm or more will be taken into the grains harvested by the self-decomposing combine. Therefore, it is important to remove foreign matters from the raw material rice cake in advance even in a small grain preparation machine for farmers. For example, when the raw material slag mixed with foreign matter is supplied to the detaching unit, the roll type grinder may cause a rapid declining rate, clogging the roll, damaging the roll gap adjusting device, etc. Causes significant damage. Moreover, even in an impact-type grabber, it may cause great damage such as damage to the fan and liner.

  Therefore, as in Patent Document 3, a coarse sorting net that does not pass coarse particles but covers coarse particles is covered on the upper surface of the dredging tank, and the coarse particles are removed in advance from the raw material before supplying the raw material to the detaching part. It is possible. However, simply covering the top of the rough sorting screen on the top of the dredging tank will not remove the large straw debris mixed in the dredging because there is no unraveling action, making it difficult to say that rough sorting is sufficient. )won.

Japanese Patent No. 340884 Japanese Utility Model Publication No. 5-22267 Japanese Utility Model Publication No. 60-42352

  In view of the above-mentioned problems, the present invention provides a rice milling machine capable of preventing a reduction in the removal rate in the removal part and damage of the removal part and improving the accuracy of rough selection. As an objective.

  In order to solve the above-mentioned problems, a first aspect of the present invention provides a rice hopper that receives raw rice cake, a detaching portion that detaches the raw material rice cake received by the potato hopper, and the rice that has been evacuated in the detaching portion. A rice milling machine equipped with a wind-selecting unit for wind-selecting and a rice-milling unit for receiving and polishing brown rice selected by the wind-selecting unit in the machine frame, wherein the rice hopper and the detaching unit Is provided with an oscillating contaminant removal unit that removes contaminants larger than the soot mixed in the raw material soot, and the contaminants removed by the contaminant removal unit are discharged out of the machine. Technical measures were taken to make an opening for making a hole in the machine casing.

  According to a second aspect of the present invention, the contaminant removing unit is provided with a bottom having a large number of long holes, two side walls standing on the bottom side edge, and the bottom rear edge. 3 points comprising a sorting screen made of a wall, and a support rod fixed to the two side walls and a support rod fixed to the rear wall for inclining and supporting the sorting screen plate on the machine frame. And a swing mechanism for swinging the sorting screen plate suspended and supported by the three support members.

  Furthermore, the invention according to claim 3 is characterized in that the length of the support rods fixed to the two side walls of the sorting screen is different from the length of the support rods fixed to the rear wall of the sorting screen. The net plate is tilted by 5 ° with respect to the horizontal direction and suspended from the machine frame.

  According to a fourth aspect of the present invention, the length of the support rod fixed to the two side walls of the sorting screen is 100 mm, and the length of the support rod fixed to the rear wall of the sorting screen is 20 mm. While the rear wall of the sorting net plate is set to the inclined high side, the sorting net plate is swung with the support rod fixed to the rear wall of the inclined high level side as a fulcrum.

  The invention according to claim 5 is characterized in that the sorting screen plate is swung with a center portion in the width direction of the rear wall of the sorting screen plate as a fulcrum.

  The invention according to claim 6 is characterized in that the sorting screen plate is swung with a corner portion of the sorting screen plate as a fulcrum.

  The invention according to claim 7 is characterized in that the swing mechanism is pivoted so as to be parallel to the rear wall of the sorting screen so as to vibrate a predetermined location on the rear wall of the sorting screen, An eccentric wheel attached to the rotating shaft, and a connecting rod connected between the eccentric wheel and a predetermined location on the rear wall of the sorting screen plate for converting the rotational motion of the eccentric wheel into a reciprocating motion. It is characterized by that.

  According to the first aspect of the present invention, the rice bran hopper that receives the raw material mash, the detaching part that detaches the raw material mash received by the cocoon hopper, and the rice that has been evacuated by the detaching part are wind-selected. A rice milling machine provided in a machine frame with a wind selection unit and a rice milling unit which receives brown rice selected by the wind selection unit, and between the rice hopper and the detaching unit. Is provided with an oscillating contaminant removal unit for removing contaminants larger than the contaminants mixed in the raw material waste, and an opening for discharging the contaminants removed by the contaminant removal unit to the outside of the machine The raw material soot that has fallen on the sorting screen is loosened by the swinging action, and along with this, coarse foreign matters larger than the soot can be quickly removed outside the machine. In other words, foreign substances can be efficiently removed before supplying raw material waste to the detaching part, preventing a reduction in the detachment rate in the detaching part and damaging the detaching part, and improving the sorting accuracy of the rough sorting. Can be improved.

  According to a second aspect of the present invention, the contaminant removing portion is erected on the bottom portion in which a large number of long holes are formed, the two side walls erected on the bottom side edge, and the bottom rear edge. 3 points comprising a sorting screen made of a wall, and a support rod fixed to the two side walls and a support rod fixed to the rear wall for inclining and supporting the sorting screen plate on the machine frame. And a swing mechanism for swinging the sorting screen plate suspended and supported by the three support members. As a result, the sorting screen plate having a bottom portion in which a large number of long holes are drilled can be swayed so as to draw an arc around this fulcrum with one of the three supporting members as a fulcrum. it can. And, while the straw is dropped from the long hole, impurities such as straw scraps and pebbles can be separated by sliding on the sorting screen.

  According to the invention of claim 3, the length of the support rod fixed to the two side walls of the sorting screen is different from the length of the support rod fixed to the rear wall of the sorting screen, The sorting screen plate can be suspended and supported on the machine frame with an inclination of 5 ° with respect to the horizontal direction.

  According to the invention of claim 4, the length of the support rod fixed to the two side walls of the sorting screen is 100 mm, the length of the support rod fixed to the rear wall of the sorting screen is 20 mm, While the rear wall of the sorting mesh plate is set to the inclined high side, the sorting mesh plate is swung so as to draw an arc around the fulcrum with the supporting rod fixed to the rear wall of the inclined high level side as a fulcrum. it can.

  According to a fifth aspect of the present invention, the sorting screen can be swung with a center portion in the width direction of the rear wall of the sorting screen as a fulcrum. The sorting screen can be swung with the corner of the screen as a fulcrum, and the vibration direction and amplitude can be changed to give an appropriate loosening action according to the type of raw material rice cake, the nature of contamination, or the mixing ratio. be able to.

  According to a seventh aspect of the present invention, the swing mechanism is pivoted so as to be parallel to the rear wall of the sorting screen so as to vibrate a predetermined location on the rear wall of the sorting screen. A connecting rod that is connected between a rotating shaft, an eccentric wheel attached to the rotating shaft, and the eccentric wheel and a predetermined location on the rear wall of the sorting screen, and that converts the rotational motion of the eccentric wheel into a reciprocating motion. Since the structure of the swing mechanism is simple, the manufacturing cost of the contaminant removal unit can be reduced.

1 is a schematic perspective view of a rice milling machine according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the rice milling machine based on embodiment of this invention. It is the schematic of the contaminant removal part when it sees from the arrow A direction of FIG. It is an expanded sectional view of a foreign substance removal part. It is a schematic perspective view of a contaminant removal part. It is a top view of a foreign material removal part. It is explanatory drawing which shows the selection effect | action of a contaminant removal part. It is explanatory drawing which shows the selection effect | action of the contaminant removal part which concerns on 2nd embodiment of this invention. It is explanatory drawing which shows the selection effect | action of the contaminant removal part which concerns on 3rd embodiment of this invention.

  The best mode for carrying out the present invention will be described with reference to the drawings. 1 is a schematic perspective view of a rice milling machine according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the rice milling machine according to an embodiment of the present invention, and FIG. 3 is a view from the direction of arrow A in FIG. FIG. 4 is an enlarged cross-sectional view of the contaminant removing unit, FIG. 5 is a schematic perspective view of the contaminant removing unit, FIG. 6 is a plan view of the contaminant removing unit, and FIG. It is explanatory drawing which shows an effect | action. FIG. 8 is an explanatory diagram of the second embodiment, and FIG. 9 is an explanatory diagram of the third embodiment.

<Overview>
1 and 2, a rice milling machine 1 is provided with a raw material rice cake hopper 3 above a substantially rectangular parallelepiped machine frame 2, and below the rice cake hopper 3 at a substantially intermediate position of the machine frame 2. A contaminant removal unit 4 that is a main part of the present invention is provided. The detailed structure of the contaminant removal unit 4 will be described later.

  Below the foreign matter removing unit 4 (see FIG. 2), the detaching unit 5 is arranged via a basket receiving bar 19, an inclined flow down chute 20 and a curved flow down chute 21 serving as a raw material supply unit. The detaching part 5 has a pair of detaching rolls 5a and 5b installed up and down, and the sliding rice is thrown out in the horizontal direction. In the vicinity of the pulverized rice discharge side of the detaching portion 5, an angle changing plate 6 for mashing the crushed rice in the vertical direction using the detaching speed and an upper conveyance pipe 7 are provided. A slight gap S is provided between the angle changing plate 6 and the upper conveying pipe 7 for collecting the rice that has not been fully cerealed. A drifting cereal board 8 that receives unsmoothed rice, a discharge port 42 that discharges the sliding rice received from the cerealing board 8 to the outside of the machine, and a residual discharge rod 18 are installed.

  The detaching part 5 is arranged at the lower part of the machine frame 2 with respect to the machine frame 2 having a substantially rectangular parallelepiped shape, but the upper conveying pipe 7 for cerealing the rice from the detaching part 5 toward the upper part of the machine frame 2 Be placed. In the upper left of the upper frame 2 of the upper conveying pipe 7 (see FIG. 2), a temporary storage tank 9 for temporarily storing the rice is disposed, and the crushed rice is moved from the upper edge of the upper conveying pipe 7 in the direction of arrow B. It is configured to be thrown out and stored in the temporary storage tank 9. In the temporary storage tank 9, a first shelf board 10 a and a second shelf board 10 b are obliquely provided, and a wind selection chamber 11 is provided below the shelf board 10. A suction dust exhaust fan 31 is connected to the wind selection chamber 11 on the upper side of the inclination of the air passage, and an outside air inlet 12 is provided in the machine frame 2 facing the suction dust exhaust fan 31. And the brown rice receiving bowl 13 for dropping and sorting brown rice in order from the side from the outside air inlet 12 toward the suction dust exhaust fan 31, and the second for dropping and sorting second dishes such as rice cake and immature grains. An object receiving rod 14 and a second object adjusting valve 15 for adjusting the discharge amount to the second object receiving rod 14 are provided. Reference numeral 17 denotes a second discharge gutter communicating with the second object receiver 14, reference numeral 31a denotes a suction port of the suction dust exhaust fan 31, and reference numeral 31b denotes an exhaust pipe capable of changing the exhaust outlet to an arbitrary angle. It is.

  Reference numeral 16 denotes a milled rice portion. The milled rice portion 16 is a horizontal rice mill in which a milling trochanter 16a rotates about a horizontal axis, and a milling net 16b is provided on the outer peripheral portion of the milling trochanter 16a to remove the milled rice. A resistance lid 16c is provided at the outlet, and a rice mill discharge basket 16d provided continuously with the discharge port and a rice cake discharge basket 16e are obliquely mounted below the rice milling net 16b, and are discharged from the discharge port 43 formed in the machine frame 2 to the outside of the machine. It becomes the composition which can discharge.

<Contaminant removal section>
Next, the contaminant removal unit 4 will be described in detail. As shown in FIG. 2 to FIG. 7, the contaminant removal unit 4 swings and moves the sorting screen plate 23 having the bottom portion 23 a in which many long holes 22 are drilled so as to draw an arc around a certain fulcrum. While the straw is dropped from the long hole 22, impurities such as straw scraps and pebbles are separated by sliding on the sorting screen 23. Reference numeral 41 denotes an opening portion opened in the machine frame 2 for discharging the removed contaminants to the outside of the machine, and reference numeral 40 denotes a contaminant discharge container provided in the opening portion.

  The sorting screen plate 23 has side walls 23b and 23c erected on the two side edges of the bottom 23a, and a rear wall 23d erected on the rear edge of the bottom 23a. On the side walls 23b, 23c and the rear wall 23d, support rods 24a, 24b, 25 for supporting the sorting screen 23 suspended from the machine frame 2 are fixed, and for further swinging the sorting screen 23. Is provided.

  As an example, the long hole 22 provided in the bottom part 23a has a short diameter of 6 mm and a long diameter of 29.5 mm. The sorting screen plate 23 has a rectangular shape with a width of about 350 mm and a length of about 300 mm (see FIG. 5), and is suspended and supported by the machine frame 2 with an inclination of 5 ° with respect to the horizontal direction. That is, the side walls 23b and 23c are respectively fixed to a pair of support rods 24a and 24b on the lower side of the slope, and are suspended and supported on the machine frame 2 via the mounting members 28a and 28b, while the rear wall 23d on the upper side of the slope is It is good to make it the structure which is supported by the L-shaped support | pillar 29 through the support rod 25 in the center of the width direction, and the said selection screen 23 is supported by three support rods 24a, 24b, 25. FIG. The support rods 24a, 24b, and 25 are preferably made of an elastic material so that the sorting screen plate 23 can swing. For example, hard urethane rubber or a leaf spring can be used. The L-shaped support column 29 is connected between the kite hopper 3 and the inclined flow chute 20 (see FIG. 4), and the rear wall 23d is substantially supported by being suspended from the machine frame 2. . In addition, the length of the support rods 24a and 24b is set to about 100 mm, the length of the support rod 25 is set to about 20 mm, and the length of the support rods 25 is varied to incline the sorting screen plate 23 by 5 ° with respect to the horizontal direction. It can be suspended and supported.

<Oscillation mechanism>
The swing mechanism for swinging the sorting screen 23 rotates between the bearings 27a and 27b provided on the front wall 2a and the rear wall 2b of the machine frame 2 so as to be parallel to the rear wall 23d of the sorting screen 23. A rotation shaft 32 that is freely mounted horizontally, an eccentric ring 33 attached to the rotation shaft 32, an eccentric bracket 34 attached to the eccentric ring 33, and the rear wall 23d of the eccentric bracket 34 and the sorting screen plate 23. It is comprised by the coupling rod 35 connected so that rocking | fluctuation was possible between. A swing pulley 36 is attached to the end of the rotating shaft 32 (see FIGS. 3 and 6), and is hung between the motor pulley fixed to the rotating shaft of a motor (not shown) and the swing pulley 36. The rotating shaft 32 is driven by the belt 37 thus formed. As a result, the eccentric wheel 33 is rotated in accordance with the rotation of the rotating shaft 32, and is oscillated in the range from the solid line state of FIG. That is, when the eccentric ring 33 is rotated, the connecting rod 35 reciprocates via the eccentric bracket 34, and the support rod 25 (the center in the width direction) provided on the rear wall 23d of the sorting screen plate 23 serves as a pivot point of rotation. The inclined lower side of the sorting screen plate 23 swings in a circular arc around the fulcrum, and swings within a range from a solid line to a chain line as shown in FIG.

<Action>
Next, the operation of the above configuration will be described. The rice milling machine 1 is activated, and the raw material is fed from the rice hopper 3. At this time, the coarse sorting grid 30 for preventing the inflow of coarse foreign matters having a diameter of 100 mm or more is suspended and supported by the hooks 38 in the opening 3a of the straw hopper 3, and coarse foreign matters are mixed into the raw material soot. If it is, the inflow of foreign matter is blocked.

  The raw material cake from which coarse foreign matters have been removed is supplied to the contaminant removal unit 4 after the flow rate is appropriately adjusted by the flow rate adjustment valve 39. In the contaminant removal part 4, as shown in FIG. 7, the raw material soot is supplied to the grain dropping area of about 20 mm width at a position approximately one third downward from the inclined upper end of the sorting net plate 23. At this time, when the rotating shaft 32 rotates, the eccentric ring 33 rotates and the connecting rod 35 reciprocates via the eccentric bracket 34, and the supporting rod 25 (width direction) provided on the rear wall 23d of the sorting screen plate 23 is obtained. The center) of the sorting screen 23 swings so as to draw an arc around the fulcrum and swings within a range from a solid line to a chain line.

  Due to this swinging action, the raw rice cake has a loosening action on the sorting net plate 23, and the entire surface of the straw or pebbles or rice straw (ina kojimomi) rice cake mixed in the straw from the raw rice cake lump The mold is attached to the part.) Etc. will be exposed. Specifically, pebbles and rice straw having a particle size of 6 mm or more, and straw scraps having a length of 30 mm or more slid through the sorting screen 23 and discharged from the foreign matter discharge basket 40 (FIG. 5). The soot leaks out from the long hole 22 and falls onto the soot receptacle 19 and the inclined downflow chute 20 below the contaminant removal unit 4. Light dust or the like generated by the swinging action of the contaminant removal unit 4 is sucked by the suction dust exhaust fan 31 via the wind selection chamber 11 as shown by the bold arrows in FIG.

  The kite that has fallen on the kite receiving bowl 19 and the sloping downflow chute 20 reaches the curved downflow chute 21 while flowing down on the chute 20, and reaches the removal section 5 composed of the removal rolls 5 a and 5 b laid vertically. It is supplied and defluxing is performed. At this time, since the foreign matter does not include pebbles having a particle size of 6 mm or more or straw scraps having a length of 30 mm or more, the detachment rolls 5a and 5b are clogged, the detachment rate is reduced, or the detachment part is damaged. Can be prevented.

  From the detaching rolls 5a and 5b installed up and down, the crushed rice is thrown out in the horizontal direction and collides with the angle changing plate 6, and the slidable rice is cerealed in the vertical direction by the upper conveying pipe 7 using the speed. The The ground rice that has not been fully ceased falls into the gap S, and is further received by the drifted grain plate 8 and discharged from the residual discharge basket 18 to the outside.

  The ground rice that has been cerealed by the upper conveying pipe 7 is stored in the temporary storage tank 9, and then flows down the first shelf board 10 a and the second shelf board 10 b to the wind selection chamber 11. In the wind selection chamber 11, along with the outside air sucked from the outside air inlet 12 (see the bold arrow in FIG. 2), the light rice husk is sucked out by the suction dust fan 31 and discharged to the outside of the machine. Falling and sorting results in a brown rice receiving tray 13, and second items such as rice bran and immature grains are dropped and sorted to reach a second receiving plate 14.

  The unpolished rice collected in the unpolished rice bran 13 reaches the milled rice section 16 and is milled by the milling trochanter 16a rotating in the milled rice net 16b. The milled rice is discharged out of the mill from the milled rice discharge mill 16d, and the milled rice net 16b. The soot leaking from the soot is discharged out of the machine from the soot discharge spear 16e. On the other hand, the second thing collected in the second thing receptacle 14 is directly discharged from the second article discharge basket 17 to the outside of the machine, or the machine through the gap S, the cereal plate 8 and the residual discharge basket 18 described above. It can be discharged outside.

  As described above, in the present embodiment, the center in the width direction of the rear wall 23d of the sorting screen plate 23 serves as a fulcrum, and the lower side of the tilting screen plate 23 swings in the width direction, so that it is coarse with a loosening action. Foreign matter can be removed and foreign matter can be efficiently removed before supplying the raw material waste to the evacuation part, while preventing a reduction in the detachment rate in the detachment part and damage to the detachment part. The sorting accuracy of rough sorting can be improved. Further, since the swing mechanism having a simple configuration is employed instead of employing the swing mechanism having a complicated configuration, the manufacturing cost of the contaminant removal unit can be significantly reduced.

<Second Embodiment>
FIG. 8 is an explanatory diagram showing the sorting action of the contaminant removal unit according to the second embodiment of the present invention. In this embodiment, instead of the first embodiment (FIG. 7), the position of the fulcrum is provided at the corner of the sorting screen plate 23, and the excitation point (vibrating position) is the rear wall 23d of the sorting screen plate 23. It is the structure provided in the center of the width direction. By adopting this configuration, the vibration direction and the amplitude are changed, so that there is an advantage that an appropriate loosening action can be given according to the type of raw material koji, the nature of the contaminants, or the mixing ratio.

<Third embodiment>
FIG. 9 is an explanatory diagram showing the sorting action of the contaminant removal unit according to the third embodiment of the present invention. In this embodiment, instead of the first embodiment (FIG. 7), the position of the fulcrum is provided in the middle between the corner of the rear wall 23d of the sorting screen plate 23 and the center in the width direction, and the excitation point is as shown in FIG. It is the structure provided in the same position. By adopting this configuration, as described above, there is an advantage that an appropriate loosening action can be given according to the varieties of raw material koji, the properties of impurities, or the mixing ratio. In addition, if the distance between the position of the fulcrum and the position of the excitation point is increased, the amplitude decreases, and conversely, if the distance between the position of the fulcrum and the position of the excitation point is decreased, the amplitude increases, and the position of the fulcrum The amplitude can be adjusted as appropriate depending on the distance from the position of the excitation point.

  The present invention can be applied as a contaminant removal unit of a grain preparation machine, such as a rice milling machine having both a detaching function and a rice milling function, and a grain dryer equipped with a straw hopper.

DESCRIPTION OF SYMBOLS 1 Rice milling machine 2 Machine frame 3 Rice hopper 4 Contaminant removal part 5 Depure part 6 Angle change board 7 Upper conveyance pipe 8 Dried grain board 9 Temporary storage tank 10 Shelf board 11 Wind selection room 12 Outside air intake 13 Brown rice receiving樋 14 Second thing receiving 15 Second thing regulating valve 16 Rice milling part 17 Second thing discharge 樋 18 Residual discharge １９ 19 籾 Receptor 20 Inclined flow chute 21 Curved flow chute 22 Long hole 23 Sorting net plate 24 Supporting gutter 25 Support rod 26 Oscillating mechanism 27 Bearing 28 Mounting member 29 L-shaped column 30 Coarse sorting grid 31 Suction dust exhaust fan 32 Rotating shaft 33 Eccentric ring 34 Eccentric bracket 35 Coupling rod 36 Oscillating pulley 37 Belt 38 Hook 39 Flow rate adjusting valve 40 Contaminant Drain 41 Opening 42 Drain 43 Drain

Claims (7)

  A rice hopper that receives raw rice cake, a detaching unit that removes raw material mash received by the rice hopper, a wind selection unit that wind-selects the crushed rice that has been evacuated in the detaching unit, and the wind selection unit A rice milling machine equipped with a rice milling unit that receives wind-selected brown rice in a machine frame, and is mixed between the rice bran hopper and the detaching unit in the raw material rice bran. An oscillating-type contaminant removing unit that removes larger contaminants is provided, and an opening for discharging the contaminants removed by the contaminant removing unit is provided in the machine frame. A rice milling machine characterized by   The foreign matter removing portion comprises a sorting net plate comprising a bottom portion provided with a number of long holes, two side walls erected on the bottom side edge, and a rear wall erected on the bottom rear edge, and the sorting net plate. In order to support the suspension by hanging the mesh plate on the machine frame, the support member has three points, each of which includes a support rod fixed to the two side walls and a support rod fixed to the rear wall, and the three-point support. 2. A rice milling machine according to claim 1, further comprising a swinging mechanism for swinging the sorting net supported suspended by the member.   The length of the support rod fixed to the two side walls of the sorting screen is different from the length of the support rod fixed to the rear wall of the sorting screen, and the sorting screen is set to 5 ° with respect to the horizontal direction. The rice milling machine according to claim 2, wherein the rice mill is tilted and supported by being suspended from the machine frame.   The length of the support rod fixed to the two side walls of the sorting screen is 100 mm, the length of the support rod fixed to the rear wall of the sorting screen is 20 mm, and the rear wall of the sorting screen is inclined higher 4. A rice milling machine according to claim 2 or 3, wherein the sorting screen is swung with a support ridge fixed to the rear wall on the inclined high side as a fulcrum.   The rice milling machine according to any one of claims 2 to 4, wherein the sorting mesh plate is swung with a center portion in the width direction of the rear wall of the sorting mesh plate as a fulcrum.   The rice milling machine according to any one of claims 2 to 4, wherein the sorting mesh plate is swung with a corner portion of the sorting mesh plate as a fulcrum.   The swing mechanism includes a rotating shaft that is pivoted so as to be parallel to the rear wall of the sorting screen plate and an eccentric wheel attached to the rotating shaft so as to vibrate a predetermined location on the rear wall of the sorting screen plate. And a connecting rod connected between the eccentric wheel and a predetermined location on the rear wall of the sorting screen for converting the rotational movement of the eccentric wheel into a reciprocating movement. Crab rice milling machine as described in Crab.

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