JP5275053B2 - Rice milling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice polisher suppressing rise of temperature and reducing crushed rice and attachment of bran. <P>SOLUTION: The rice polisher 10 is provided with a milling chamber 37 comprising a rice turning body 17 mounted on a main spindle 16 and rotated and having a plurality of protrusions protruded in the radial direction from an outer periphery, and linearly extended in an axial direction, and a milling cylinder 38 enclosing the rice turning body 17 and provided with bran-removing holes penetrating inner and outer peripheral surfaces. Brown rice is fed from a grain sending chamber 13 set at one end of the milling chamber 37, and polished rice passes through a space between the rice turning body 17 and the milling cylinder 38 and is discharged while pushing out a resistant disc 56 which energizes and seals the other end discharge port 51. In the rice polisher, the main spindle 16 is tilted by a given angle with respect to the vertical direction and disposed, the milling cylinder 38 is cylindrically formed, and a plurality of resistance plates having tilted faces whose heights increase in the rotation direction of the main spindle 16 are set on the inner face of the milling cylinder 38. Thus, the rise of temperature of rice is suppressed, and crushed rice and attachment of bran can be reduced to perform rice polishing. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rice mill.

  As a conventional rice milling machine, a machine that rotates a crushed rice body having a plurality of protrusions at the center of a polygonal milling room such as a hexagon is known (see Patent Document 1). As shown in FIG. 10, the gap between the milling square tube 72 forming the milling chamber 71 and the crushed rice 73 becomes closer to the boundary line connecting the center point of the crushed rice 73 and the midpoint of one side of the hexagon. It gets narrower and gets wider as you leave. When the rotating rice body 73 is rotated, when the protrusion 74 pushes the rice into a narrower gap, the inner surface of the fine rectifying tube 72 becomes a resistance to prevent the rice from progressing, and causes a speed difference in the rice layer. . As a result, the rice and the rice are rubbed together, and the skin of each rice is peeled off. The problem with this conventional rice milling machine is that the rice is subjected to high pressure on the rice.

  To make rice whiter, more pressure is required, but the higher the pressure, the greater the damage to the rice. The rice cracks during milling and becomes broken rice. Moreover, even if it does not crack visually after milling, it may break when immersed in water (water-cracking). When the pressure is increased and the rice is polished, the temperature of the rice increases. That is, when a high pressure is applied and the rice and the rice are rubbed together, the frictional force increases, but the heat generated by the friction also increases and the temperature of the rice rises. In general, it is said that the higher the temperature of the rice, the worse the taste of the rice, and the lower the temperature of the polished rice, the better. As described above, conventional rice milling involves the problem that high pressure is required to increase the whiteness of rice and to polish the rice, which causes a lot of crushed rice and further makes the rice unfavorable.

  Further, in conventional polished rice, a lot of fine wrinkles adhere to the surface of the rice. Therefore, a polishing machine is installed separately from the rice mill, and the surface of the rice is polished once again to remove fine wrinkles adhering to the surface of the rice.

Japanese Utility Model Publication No. 33-16256

  It is an object of the present invention to provide a rice milling machine capable of polishing rice so that the temperature rise of rice is suppressed and adhesion of crushed rice and rice bran is reduced.

  As a means for solving the above-mentioned problems, a rice milling machine according to the present invention is a rice mill having a plurality of protrusions mounted on a main shaft and rotating, projecting radially from an outer peripheral surface and extending linearly in the axial direction. And a rice milling chamber comprising an inner circumferential surface and a rice milling cylinder provided with a removal hole penetrating the outer circumferential surface, surrounding the circulated rice body, and removing brown rice from a cerealing chamber provided at one end of the rice milling chamber In a rice mill that discharges the polished rice by pushing in and opening a resistance disk that energizes and seals the outlet at the other end, passing between the crushed rice mill and the milling mill, It is arranged so as to be inclined at a predetermined acute angle with respect to the vertical direction, the fine cylinder is cylindrical, and a plurality of resistance plates having inclined surfaces whose height increases in the rotation direction of the main shaft are provided on the inner peripheral surface thereof. I have to.

  According to this configuration, since the milling cylinder is cylindrical and the distance from the crushed rice is constant over the entire circumference, strong pressure is applied to the rice that is rotated to the crushed rice inside the milling cylinder. There is no repeated release from pressure. Inside such a milling cylinder, the rice that is pushed by the protrusions of the rotator and rotates in the circumferential direction changes the direction of travel greatly inside the milling room by the inclined surface of the resistance plate, and the rice around the rice Rubbed together. Thereby, the ridge part of the surface of rice is peeled. In this way, the frictional force necessary for milled rice can be generated locally and instantaneously, so that an increase in rice temperature can be suppressed. Moreover, it becomes difficult for fine wrinkles to adhere to the surface of the rice. If the main axis of the rice mill is tilted by a predetermined acute angle with respect to the vertical direction and the milling chamber is tilted, the rice can be sent to the discharge port side using gravity. That is, it is possible to reduce the resistance in the feeding direction of the rice inside the milling room. Thereby, the amount of polished rice per unit time can be increased. In addition, since the main shaft is inclined, no rice remains in the rice mill, so that the mixed rice is not mixed.

  The predetermined acute angle of the main axis is preferably 45 °.

  It is preferable that an angle formed by the inclined surface of the resistance plate and the circumferential surface of the fine barrel is 60 ° to 45 °. According to this configuration, the angle formed between the inclined surface where the rice rotated by the rotator is in contact with the resistance plate on the inner peripheral surface of the milling cylinder and the circumferential surface of the milling cylinder is set to 60 ° or less. Can reduce the impact of collision. Further, by setting the angle to 45 ° or more, when the rice gets over the resistance plate, a moderate impact is given and the ridge portion can be removed. If it does in this way, broken rice can be decreased, performing rice milling.

  The removal hole is a long hole parallel to the circumferential direction of the fine barrel, or a long hole whose front end is located on the discharge port side parallel to the circumferential direction of the fine barrel with respect to the rotation direction of the main shaft. Is preferred. According to this configuration, since the resistance generated when the rice is fed from the inside of the milling tube toward the discharge port is reduced, generation of unnecessary fine rice cake can be suppressed, and adhesion of fine rice cake to the rice is reduced. be able to.

  It is preferable that the lower end of the main shaft is provided with a tip member having an inner diameter that is the same as or smaller than the inner diameter of the crushed rice body, and an end surface having a spiral surface that advances in the rotation direction of the main shaft. According to this configuration, by reducing the inner diameter of the tip member of the main shaft of the rice milling machine to be equal to or smaller than the inner diameter of the crushed rice, the resistance in the rice feed direction at the inside of the milling chamber and at the discharge port is reduced. Can be made. Further, the spiral surface of the tip member that moves forward with respect to the rotation direction of the main shaft can push the rice in contact with the spiral surface to the front side in the tangential direction of the spiral constituting the spiral surface by the rotation of the main shaft. As a result, rice can be discharged.

  The lower end of the main shaft has an inclined surface having an inner diameter that is the same as or smaller than the inner diameter of the crushed rice body, and whose semi-circular inclined members are inclined concentrically with the center of the end surface in opposite directions. It is preferable to provide a tip member provided with two projecting portions so as to have, and to have a hole larger than the outer periphery of the base end of the projecting portion concentrically with the center of the resistance disk. According to this configuration, the inclined member having inclined surfaces inclined in opposite directions of the protruding portion rotates to push the rice between the inclined member and the resistance disk outward in the radial direction, so that the base of the protruding portion of the tip member is Rice can be discharged from a hole in the resistance disk that is larger than the outer periphery of the end.

  According to the present invention, the frictional force necessary for milled rice can be generated locally and instantaneously, so that an increase in rice temperature can be suppressed.

  By making the angle formed between the inclined surface of the resistance plate of the fine barrel and the circumferential surface of the fine barrel to be 60 ° or less, the impact of the collision can be reduced. Further, by setting the angle to 45 ° or more, when the rice gets over the resistance plate, a moderate impact is given and the ridge portion can be removed. By these, it is possible to reduce the amount of broken rice while performing milling.

  By making the removal hole a long hole parallel to the circumferential direction of the fine barrel, or a long hole whose front end is located on the discharge port side parallel to the circumferential direction of the fine barrel with respect to the rotation direction of the main shaft, It is possible to reduce the resistance generated when the rice is fed from the inside toward the outlet. As a result, generation of unnecessary fine ridges can be suppressed, and adhesion of fine ridges to rice can be reduced.

  By tilting the main axis of the rice milling machine by a predetermined acute angle with respect to the vertical direction, the resistance in the rice feeding direction inside the milling room can be reduced, so that the amount of polished rice per unit time can be increased. .

  In addition, since the main shaft is inclined, no rice remains in the rice mill, so that the mixed rice is not mixed.

  The rice between the tip member and the resistance disk can be discharged by the tip member of the main shaft.

The figure which shows the rice mill in 1st Embodiment of this invention. The figure which shows the lower part of a main axis | shaft. The disassembled perspective view of the front-end | tip part of a main axis | shaft. The figure which shows the precision tube in which the long hole removal hole was regularly arrange | positioned at intervals in the circumferential direction and the cylinder direction in the circumferential direction. VV sectional view taken on the line of FIG. The figure which shows the blast hole formed in the recovery rice body. The figure which shows the rice-milling state by rotation of the rotary rice body in a tub mill. The figure which shows the fastener and resistance disk in 2nd Embodiment. FIG. 3 is a view showing a fine barrel in which long holes are arranged in a direction different from that of the first embodiment. The figure which shows the rice milling state of the conventional rice milling machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, a first embodiment of a rice mill 10 according to the present invention will be described. 1 and 2 show a rice mill 10 according to the present invention. Inside the rice mill 10, the shaft is inclined 45 ° from the vertical direction, and the upper end is rotatably supported on the side surface of the housing 11 via a bearing 12, and the intermediate part passes through a cerealing chamber 13 described later. A spindle 16 that is rotatably supported by a flange portion 14 of the grain chamber 13 via a bearing 15 is provided. The main shaft 16 is made of a hollow pipe. As shown in FIG. 3, an internal thread is cut in the inner portion of the lower end of the main shaft 16. A plurality of holes 18 are provided in a portion of the main shaft 16 which is inserted into the later-described crushed rice body 17 above the portion where the female thread is cut.

  An air guide portion 21 that surrounds the upper end of the main shaft 16 and includes a blast air inlet 20 is fixed to the housing 11 at the upper end of the main shaft 16. A blast fan (not shown) outside the rice mill 10 is connected to the blast air inlet 20 of the wind guide portion 21.

  A main shaft pulley 23 is fixed to the main shaft 16. A motor (driving body) 24 for driving the main shaft 16 is provided in the rice mill 10. A motor pulley 25 attached to the rotating shaft of the motor 24 is connected to the main shaft pulley 23 via a V-belt 26.

  At the upper part of the rice mill 10, a brown rice hopper 28 for introducing brown rice is provided. An inlet 29 is provided at the upper end of the brown rice hopper 28. The lower end of the brown rice hopper 28 is connected to the cerealing room 13 via the brown rice supply path 30. The brown rice supply path 30 is provided with a grain supply shutter 31 for opening and closing the flow path. In the present embodiment, in the brown rice supply path 30, the opening of the grain supply shutter 31 is adjusted so that the brown rice is charged and the flow rate is adjusted at the same time, but the flow rate adjustment is separate from the grain supply shutter 31. An apparatus may be provided.

  The cerealing chamber 13 is disposed so as to surround the rice feeding screw 33 mounted on the main shaft 16 and is fixed to the housing 11. An intermediate wall perpendicular to the axial direction of the main shaft 16 is provided in the cerealing chamber 13, and a hole 35 for loosely inserting the main shaft 16 is provided in the intermediate wall. A flange portion 14 is provided in an opening portion on the upper side in the axial direction of the main shaft 16 of the cerealing chamber 13. The flange portion 14 is provided with a bearing 15 that supports an intermediate portion of the main shaft 16.

  A milling chamber 37 is provided at an opening on the axially lower side of the main shaft 16 of the cerealing chamber 13. The milling chamber 37 includes a cylindrical milling cylinder 38 made of punched metal made of iron or stainless steel, and a rice mill 17 mounted on the main shaft 16 inside the milling cylinder 38.

  As shown in FIG. 4, a plurality of elongate removal holes 39 are regularly arranged in the circumferential direction and spaced apart in the circumferential direction and the cylindrical direction. The milling tube 38 is connected to the milling chamber 13 and the inner peripheral surface with the same cross-sectional shape so that there is no gap between the milling chamber 13 and the milling chamber 38 of the milling chamber 37, and is fixed to a frame (not shown). Has been.

  As shown in FIG. 5, a plurality of resistance plates 40 extending linearly in the cylindrical direction are provided on the inner peripheral surface of the fine barrel 38. Although depending on the diameter of the fine barrel 38, the number of the resistance plates 40 is preferably 4-8. In the present embodiment, the number of resistance plates 40 is six. The resistance plate 40 is a trapezoidal plate having an inclined surface 40a whose height increases from the position in contact with the inner peripheral surface of the milling cylinder 38 in the rotational direction of the rotator 17. An angle α formed by one side which is a hypotenuse in the cross section of the resistor plate 40 and one side on the inner peripheral surface of the fine barrel 38 is 60 ° to 45 °. The plate thickness, which is the distance between one side that is parallel in the cross section of the resistor plate 40, is preferably slightly narrower than the width of the substantially elliptical shape of the rice grains in the minor axis direction.

  The crumpled rice body 17 is provided with two protrusions 42 extending outward from the outer peripheral surface so as to be substantially in line with each other. As shown in FIG. 5 and FIG. 6, the outer circumferential surface of the crushed rice body 17 adjacent to the rear side surface of the projection 42 of the crushed rice body 17 with respect to the rotational direction of the crushed rice body 17 (the arrow direction in the drawing). Is provided with a blast hole 43 formed of a long hole over a range corresponding to substantially the entire length of the protrusion 42. The blast hole 43 is provided with a net (fall prevention member) 44 for preventing rice from entering the inside of the recycled rice body 17. A punching metal may be provided instead of the net 44.

  As shown in FIGS. 1 to 3, the rice feeding screw 33 and the rotating body 17 are inserted into the main shaft 16, the upper end of the rice feeding screw 33 abuts against the stop portion 46 of the main shaft 16, and a female screw portion is provided inside the tip. The rice feed screw 33 and the rolled rice body 17 are clamped and fixed by screwing together the main shaft 16 having a fastening member (tip member) 48 having a male screw portion on the outside. The end surface of the stopper metal 48 is a spiral surface that advances in the rotation direction of the main shaft 16 and has a spiral curved portion 49 that is pushed out radially from the center of the shaft by rotation.

  On the lower side in the axial direction of the main shaft 16 of the milling chamber 37, a cylindrical portion that communicates with the milling chamber 37, protrudes further from the tip of a stopper 48 attached to the main shaft 16, and has an opening below the main shaft 16 in the axial direction. A discharge port 51 formed in (1) is provided. The inner surface of the finishing tube 38 and the discharge port 51 are connected with the same cross-sectional shape so that there is no gap between the finishing tube 38 and the discharge port 51 of the cleaning room 37, and is fixed to a frame (not shown). Yes.

  An air cylinder 53 is provided in the housing 11. The tip of the air cylinder 53 is in contact with one end of a pressing member 55 whose fulcrum is supported by a support member 54 extending from the housing 11. A resistance disk 56 is connected to the other end of the pressing member 55, and the resistance disk 56 is pressed by the pressing member 55 urged by the air cylinder 53 to seal the discharge port 51. The air cylinder 53, the support member 54, the pressing member 55, and the resistance disk 56 constitute a sealing mechanism that urges and seals against the discharge port 51.

  The take-out hopper 58 is provided so that a part of the pressing member 55 is inserted and a resistance disk 56 connected to the press- ing member 55 can seal or open the discharge port 51 inside the take-out hopper 58. At the lower end of the take-out hopper 58, an take-out port 59 for taking out the polished white rice is provided.

  The tub chamber 37 is provided with a cylindrical tub discharge passage 61 surrounding the outer periphery of the tub tube 38. The culm discharge passage 61 communicates with the inside of the sperm cylinder 38 of the sperm chamber 37 through the demineralization hole 39.

  A soot hopper 62 is connected to the soot discharge path 61. The lower part of the rice hopper 62 is connected to a rice collecting device (not shown) outside the rice mill 10.

  Next, the flow of rice in the rice mill 10 according to the present invention will be described. Brown rice is put into an inlet 29 of the brown rice hopper 28 and stored. Then, when the main shaft 16 is rotated by the motor 24 and the shutter 31 of the brown rice supply path 30 is opened, the brown rice is fed into the cerealing chamber 13 of the rice milling machine 10 and the rice milling chamber through the rice feeding screw 33 of the cerealing chamber 13. It is fed into the inside of the 37 fine barrels 38.

  The brown rice first introduced into the rice mill 10 passes through the space between the inclined rice mill 38 and the crushed body 17 according to gravity because the inside of the rice mill 38 is empty, and is not polished to the discharge port 51. Will reach. Then, the brown rice that has been subsequently introduced is also fed into the milling cylinder 38 by the rice feed screw 33, and when it is successively fed to the discharge port 51 side, the brown rice is stacked to fill the interior of the milling mill 38. After that, when the feeding is continued and the brown rice feeding by the rice feeding screw 33 in the cerealing chamber 13 reaches the position accompanied by the pushing of the brown rice directly under the rice feeding screw 33, the rice feeding screw 33 applies pressure to the brown rice and the milling cylinder A force to push into 38 is generated. Due to the balance between the force and the force with which the air cylinder 53 presses the resistance disk 56 against the discharge port 51, the feed direction (from the upper end side to the lower end side in the axial direction of the main shaft 16) Pressure in the direction of heading).

  The force with which the rice-feeding screw 33 pushes the brown rice into the milling cylinder 38 is constant because a constant amount of brown rice is always introduced per hour if the opening of the grain supply shutter 31 is kept constant. The force with which the air cylinder 53 presses the resistance disk 56 against the discharge port 51 can be changed by adjusting the air pressure of the air cylinder 53. Therefore, the pressure in the feed direction can be adjusted to a desired pressure by adjusting the air pressure of the air cylinder 53. In the present embodiment, it is better to adjust the internal pressure in the feeding direction of the fine barrel 38 as low as possible by adjusting the opening of the grain supply shutter 31.

  As shown in FIG. 7, when the rolled rice body 17 in the milling cylinder 38 is rotated, the brown rice on the forward side in the rotation direction of the protrusion 42 is pushed out in the rotation direction by the protrusion 42 of the rolled rice body 17. As the crushed body 17 advances in the rotational direction, the projection 42 of the crushed body 17, the resistance plate 40 on the inner peripheral surface of the fine barrel 38 that is closest to the projection 42 on the forward side in the rotational direction of the projection 42, the crushed rice body 17, and The space formed by being surrounded by the fine barrel 38 is gradually narrowed. Then, among the brown rice in the space, the brown rice that is in contact with the inner peripheral surface of the milling tube 38 in front of the inclined surface 40 a of the resistance plate 40 with respect to the advance direction of the rolled rice body 17 advances in the rotational direction by the resistance plate 40. The direction of travel is changed along the inclined surface 40a of the resistor plate 40 while the hand going to the side is blocked. The brown rice that changed its direction of travel further pressed locally the brown rice that had already been in close contact with each other around the brown rice, and that partial brown rice also changed its direction of travel, and that part of the brown rice The surface of brown rice is shaved by polishing the rice with different speeds. Inside the milling mill 38, the brown rice passes through the inclined surfaces 40 a of the plurality of resistance plates 40 in the circumferential direction and the axial direction of the milling mill 38, and the positions of the brown rice and milled rice are interchanged with each other. The brown rice inside is turned into polished white rice and sent to the outlet 51.

  Since the stopper 48 inside the discharge port 51 has an inner diameter smaller than the inner diameter of the rolled rice body 17, the space inside the discharge port 51 is wider than the space inside the fine barrel 38. Therefore, there is little resistance when the rice advances from the exit of the milling tube 38 to the entrance of the discharge port 51.

  The discharge port 51 is sealed by pressing a resistance disk 56 through a pressing member 55 by an air cylinder 53. When the rice sent to the discharge port 51 presses the resistance disk 56, the air cylinder 53 is pushed back through the pressing member 55, and a gap is generated between the discharge port 51 and the resistance disk 56. Out of the gap, the outlet to the take-out hopper 58 is an outer peripheral portion of the end surface of the cylindrical portion of the discharge port 51, and rice is discharged in order from a portion close to the outer periphery of the discharge port 51.

  On the other hand, the main flow of rice proceeds from between the milling cylinder 38 and the crushed rice body 17 in the vicinity of the inner peripheral surface of the cylindrical portion of the discharge port 51 and goes out of the discharge port 51. The rice near the center of the cylindrical part is hardly discharged because it is hardly affected by the flow of rice in the feed direction.

  However, by pushing the rice near the center of the cylindrical portion of the discharge port 51 radially from the center of the shaft with the rotation of the main shaft 16 by the spiral curved portion 49 of the stopper 48, Can be discharged out of the discharge port 51 on the flow in the feed direction.

  The wind generated by a blast fan (not shown) passes through the main shaft 16 that is a hollow pipe through the air guide portion 21 and is blown from a plurality of holes 18 that are opened on the lower end side of the main shaft 16. The The wind passes through the blast hole 43 of the crushed rice body 17, and then passes from the inside of the fine milling tube 38 to the outside through the removal hole 39 of the fine milling cylinder 38. The cocoons peeled inside the tub tube 38 by the wind are discharged from the tubing holes 39 of the tub tube 38 to the tub discharge passage 61 outside the tub chamber 37 and collected by the tub hopper 62, and the lower part of the tub hopper 62. The air is conveyed to a collecting device (not shown) outside the rice mill 10. By blasting outward from the central portion of the fine milling tube 38, the straw is blown out from the fine grinding tube 38 to the outside, and an increase in rice temperature can be suppressed.

Next, a second embodiment of the rice milling machine 10 according to the present invention will be described. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 8 shows a stopper (tip member) 64 and a resistance disk 65 in the present embodiment. The outer diameter of the stopper metal 64 is the same as the outer diameter of the main shaft 16. At the center of the distal end portion of the stopper metal 64, there is provided a protruding portion 70 that is formed by concentrating two semi-circular inclined members 68 that are concentric with the center of the end surface so as to have inclined surfaces 69 that are inclined in opposite directions. It has been. The front end of the pressing member 63 with which the front end of the air cylinder 53 abuts is connected to the resistance disk 65 provided with a hole 66 at the center portion in a shape that can be attached by a part without the hole 66 . The radius of the hole 66 is slightly larger than the radius of the outer peripheral circle of the base end 67 of the protrusion 70.

When the main shaft 16 is rotated, the rice between the protrusion 70 and the resistance disk 65 is discharged to the outside from the hole 66 of the resistance disk 65 by the inclined surface 69 of the inclined member 68 of the protrusion 70. In this way, the rice existing between the stopper metal 64 and the resistance disk 65, in particular, is first introduced when the rice is milled, and is not polished between the stopper metal 64 and the resistance disk 65 in the milling chamber 37. The brown rice that has reached can be easily discharged.

  The present invention has been described according to the embodiment so far, but the present invention is not limited to the embodiment, and various modifications are possible. For example, as shown in FIG. 9, the fine milling tube 38 has a plurality of regularly arranged long holes with a front end positioned on the discharge port 51 side with respect to the rotation direction of the rotator 17. It may be.

  The experimental result regarding the direction of the long hole of the fine barrel 38 by this inventor is shown. In the rice milling machine 10 that was tested, the capacity of the motor 24 is 7.5 HP (5.5 kw), the load of the motor 24 is 22 A, and the flow rate and the pressure of the resistance disk 56 are adjusted so that the whiteness is the same. Polished rice. The sample was Koshihikari from Shiga Prefecture in 2007.

  When a long hole is opened in the direction in which the rice is returned when the rolled rice body 17 rotates, the rice milling capacity is 428 kg / hour, the rice temperature rise is 23.0 ° C., the whiteness is 40.3, The condition resulted in a slight amount of fine white coral adhesion.

  When a long hole is opened in parallel with the circumferential direction of the crushed rice body 17, the rice milling capacity is 751 kg / hour, the rice temperature rise is 16.3 ° C., the whiteness is 40.5, and the state of the rice surface is The result was beautiful with less adhesion of fine white coral.

  When a long hole is drilled in the direction in which rice is sent out when the crushed rice body 17 rotates, the rice milling capacity is 767 kg / hour, the rice temperature rise is 15.9 ° C., and the whiteness is 40.5. The condition was beautiful with less adhesion of fine white coral.

  From the above results, it has been found that it is preferable that the long hole is formed in a direction parallel to the circumferential direction of the rolled rice body 17 or in a direction in which the rice is fed out.

  The experimental result which this inventor performed about the relationship between the angle (alpha) of the inclined surface 40a of the resistance plate 40 of the tub tube 38, and the generation | occurrence | production ratio of the rice (tip missing rice) in which the part which holds the embryo is missing is shown. The sample was Koshihikari from Shiga Prefecture in 2007.

  When the angle α of the inclined surface 40a of the resistance plate 40 is 90 °, the leading edge ratio is 13.7%, the whiteness is 41.3, and the surface of the rice is beautiful with little adhesion of fine white glaze. It was.

  When the angle α of the inclined surface 40a of the resistance plate 40 is 60 °, the leading edge ratio is 5.8%, the whiteness is 41.0, and the surface of the rice is beautiful with little fine white glaze attached. It was.

  When the angle α of the inclined surface 40a of the resistance plate 40 is 45 °, the chipping ratio is 5.3%, the whiteness is 42.0, and the surface of the rice is beautiful with little adhesion of fine white glaze. It was.

  When the angle α of the inclined surface 40a of the resistance plate 40 is 30 °, the chipping ratio is 4.3%, the whiteness is 41.5, and the surface of the rice is covered with fine white wrinkles. It became the result.

  There is no particular difference depending on the commercially available product. In the commercial product A (Koshihikari produced in Shiga Prefecture in 2007), the tip loss ratio was 5.5%, whereas in the commercial product B (Koshihikari produced in Fukushima Prefecture in 2007), 5.3. As a result, both of the rice surface conditions showed a lot of fine white birch adhesion.

  By combining the above results, it was found that the angle of the inclined surface 40a of the resistor plate 40 is preferably 60 ° to 45 ° with a small chipping ratio and little white haze adhesion.

  The rice mill 10 according to the present invention has the following effects.

  According to this configuration, the space between the milling cylinder 38 and the rice cake 17 can be made equal by surrounding the rice mill 17 in the milling chamber 37 with the milling cylinder 38. Thereby, it can avoid that rice is overstressed. The rice rotating in the circumferential direction by being pushed by the protrusions 42 of the crushed rice body 17 within the milling cylinder 37 that is not excessively pressed instantaneously generates a frictional force due to the speed difference required for the milling. The traveling direction is greatly changed only by the inclined surface 40a of the resistance plate 40, and the rice around the rice is rubbed against each other. Thereby, the heel portion is peeled off. The peeled heel portion is discharged from a removal hole 39 that penetrates from the inner peripheral surface of the fine barrel 38 to the outer peripheral surface. In this way, the frictional force necessary for milled rice can be generated locally and instantaneously, so that an increase in rice temperature can be suppressed. Moreover, it becomes difficult for fine wrinkles to adhere to the surface of the rice. Further, by tilting the milling chamber 37 by tilting the main shaft 16 of the rice mill 10 by a predetermined acute angle with respect to the vertical direction, the rice can be sent to the discharge port 51 side using gravity. That is, it is possible to reduce the resistance in the rice feeding direction inside the semen chamber 37. Thereby, the amount of polished rice per unit time can be increased. Furthermore, since rice does not remain in the rice mill 10, it will not be mixed.

  In addition, according to this configuration, the angle formed by the inclined surface 40a where the rice rotated by the crushed rice body 17 contacts the resistance plate 40 on the inner peripheral surface of the milling cylinder 38 and the circumferential surface of the milling cylinder 38 is formed. By setting the angle to 60 ° or less, the impact of the collision can be reduced. Further, by setting the angle to 45 ° or more, when the rice gets over the resistance plate 40, a moderate impact is applied and the ridge portion can be removed. By these, it can polish rice so that a broken rice may decrease.

  Further, according to this configuration, the removal hole 39 is a long hole parallel to the circumferential direction of the fine barrel 38, or the front end is parallel to the circumferential direction of the fine barrel 38 with respect to the rotation direction of the main shaft 16, and the front end is on the discharge port 51 side. Therefore, the resistance generated when the rice is fed from the inside of the fine barrel 38 toward the discharge port 51 can be reduced. As a result, the fine sized rice swarfed by the scouring holes 39 can be reduced, and as a result, the amount of slag attached to the polished rice can be reduced.

  The rice between the tip members 48 and 64 and the resistance disks 56 and 65 can be discharged by the tip members 48 and 64 of the main shaft 16.

DESCRIPTION OF SYMBOLS 10 Rice mill 11 Housing 12 Bearing 13 Graining chamber 14 Flange part 15 Bearing 16 Main axis | shaft 17 Reinforcement body 18, 66 holes 20 Jet air inlet 21 Air guide part 23 Main shaft pulley 24 Motor (driving body)
25 Motor pulley 26 V belt 28 Brown rice hopper 29 Input port 30 Brown rice supply path 31 Grain supply shutter 33 Rice feed screw 35 hole 37 Grain chamber 38 Grain tube 39 Detaching hole 40 Resistance plate 42 Protrusion 43 Jet hole 44 Net (falling) Prevention member)
46 Stopper 48,64 Stopper (tip member)
49 spiral curve portion 51 discharge port 53 air cylinder 54 support member 55, 63 pressing member 56,65 resistance disk 58 take-out hopper 59 take-out port 61 糠 discharge path 62 糠 hopper 67 base end 68 inclined member 69 inclined surface 70 protrusion

Claims (6)

A rotating rice body mounted on the main shaft and rotated, protruding from the outer peripheral surface in the radial direction, and having a plurality of protrusions extending linearly in the axial direction, and surrounding the rotating rice body, the inner peripheral surface and the outer peripheral surface A milling chamber comprising a milling hole provided with a penetrating hole is provided, brown rice is fed from a cerealing chamber provided at one end of the milling chamber, and the other passes through the rice mill and the milling cylinder In the rice mill that discharges the polished rice by pushing open the resistance disk that energizes and seals the outlet at the end,
The main shaft is disposed at a predetermined acute angle with respect to the vertical direction,
A rice milling machine characterized in that the milling mill is cylindrical, and a plurality of resistance plates having inclined surfaces whose height increases in the rotation direction of the main shaft are provided on the inner peripheral surface thereof.   The rice mill according to claim 1, wherein the predetermined acute angle of the main shaft is 45 °.   The rice mill according to claim 1 or 2, wherein an angle formed between the inclined surface of the resistance plate and the circumferential surface of the milling mill is 60 ° to 45 °.   The removal hole is a long hole parallel to the circumferential direction of the fine barrel, or a long hole whose front end is located on the discharge port side parallel to the circumferential direction of the fine barrel with respect to the rotation direction of the main shaft. A rice mill according to any one of claims 1 to 3, wherein:   The lower end of the main shaft is provided with a tip member having an inner diameter that is the same as or smaller than the inner diameter of the crushed rice body, and an end surface having a spiral surface that advances in the rotation direction of the main shaft. The rice milling machine according to any one of claims 1 to 4.   The lower end of the main shaft has an inclined surface having an inner diameter that is the same as or smaller than the inner diameter of the crushed rice body, and whose semi-circular inclined members are inclined concentrically with the center of the end surface in opposite directions. 2. A tip member provided with two projecting portions so as to have each other, and a hole larger than the outer periphery of the base end of the projecting portion is provided concentrically with the center of the resistance disk. The rice milling machine according to any one of claims 4 to 4.

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