JP2018057996A - Grain milling roll, and grain milling machine with the grain milling roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain milling machine that can reduce the weight of a grain milling roll and perform cooling without increasing the size of the whole outer shell.SOLUTION: A hollow cylindrical grain milling roll is rotatably installed in a grain polishing tube. The grain milling roll is formed of a base metal having a superabrasive grain layer on the outer peripheral surface, and in the inner peripheral surface of the base metal, cooling fins formed with a bulk specific gravity that is smaller than the bulk specific gravity of the base metal are buried. With this, the inner peripheral surface of the base metal having the large bulk specific gravity is cut to form grooves, and the cooling fins having the small bulk specific gravity are buried, so that the base metal is reduced in weight and it becomes possible to perform indirect cooling from the bore of the grain milling roll without increasing the size of the whole outer shell.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to a cereal roll and a pulverizer equipped with the cereal roll, and in particular, can be applied to a brewer's pulverizer having a non-porous milling cylinder.

  Conventionally, in order to obtain brewed rice having a high degree of whiteness with a yield of about 50 to 70%, a vertical grinding type pulverizer equipped with a circulation means is commonly used. In this kind of pulverizer, a non-porous milling cylinder is used because it requires moderate cocoons, and air is directly blown into the milling chamber in order to prevent moisture loss due to blowing on the rice grains. Not. For this reason, if the grain temperature is raised and the heat is not dissipated and maintained at a high temperature, when the rice grain is discharged out of the machine, it has an adverse effect such as instant cracking.

  Therefore, in the whitening room air cooling apparatus described in Patent Document 1, an outer wall is provided so as to form an empty room surrounding the whitening cylinder, and this empty room is provided with an air inlet and an outlet, and further, the whitening cylinder in the empty room is provided. The outer peripheral wall is provided with technical means of integrally providing cooling blades extending in a substantially horizontal direction. Thus, there is an action and an effect that the whitening cylinder is uniformly cooled while the circulating air moves along the outer circumference of the whitening cylinder and gradually moves toward the outlet.

  However, the technique disclosed in Patent Document 1 has a problem in that the outer shell of the pulverizer itself increases in size because an empty chamber is provided surrounding the outside of the white milling cylinder.

  On the other hand, in the pulverizer disclosed in Patent Document 2, a hard sand roll is rotatably disposed at the axial center position of the white mill configured as a net-shaped cylinder, and the inside of the hard sand roll has a cross-section. A chamber hollowed out in a concave shape is provided, and a large number of air holes are formed between the inside of the metal sand sand roll and the surface of the gold sand sand roll so as to communicate with the room, so that air can be ventilated from the inside of the gold sand sand roll toward the reticulated cylindrical body. Is. As a result, when the raw rice is refined, air is blown from the inside of the gold sand roll toward the reticulated cylindrical body, so that the roll surface is cooled and the grain temperature is cooled while being refined so that a good quality can be obtained. Has the effect of being able to be processed into sake rice.

  However, in the technique of Patent Document 2, the outer shell of the grain mill itself does not increase in size, but has a problem of causing moisture loss because it is ventilated into the rice grain. Further, there is a problem that the structure is complicated by providing an air flow path on the rotating shaft.

JP-A-2-191553 Japanese Utility Model Publication No. 50-89865

  In view of the above problems, an object of the present invention is to provide a pulverizer capable of reducing the weight of a cereal roll and cooling the entire outer shell without increasing its size.

  In order to solve the above-mentioned problems, the present invention is a hollow cylindrical corn roll that is rotatably mounted in a white mill, and the cereal roll is formed from a base metal having a superabrasive layer on the outer peripheral surface. On the other hand, technical measures were taken to embed cooling fins formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal on the inner peripheral surface of the base metal.

  In addition, a sperm roll is rotatably mounted in a standing non-porous milling cylinder, a gap between the milling roll and the milling cylinder is formed in a milling chamber, and a supply port communicating with the milling chamber And a vertical grinding flour mill provided with a discharge port, and the inner surface of the base metal is formed from a base metal having a superabrasive grain layer on the outer peripheral surface in the whitening cylinder. In this case, a cereal roll embedded with cooling fins formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal is provided to be rotatable.

  According to the present invention, it is a hollow cylindrical corn roll that is rotatably mounted in a white mill, and the corn roll is formed from a base metal having a superabrasive layer on the outer peripheral surface, Since the cooling fins formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal are embedded in the inner peripheral surface of the base metal, the inner peripheral surface of the base metal with a large bulk specific gravity is shaved to form a groove, Because it was decided to embed a cooling fin with a small bulk specific gravity in this groove, the weight of the base of the cereal roll was reduced, and the size of the entire outer shell was not increased. It becomes possible to cool.

  A feed port is provided that communicates with the milling chamber, in which a milling roll is rotatably mounted in a standing non-porous milling cylinder and a gap between the milling roll and the milling cylinder is formed in the milling chamber. And a vertical grinding flour mill provided with a discharge port, and the inner surface of the base metal is formed from a base metal having a superabrasive grain layer on the outer peripheral surface in the whitening cylinder. Since the milling roll embedded in the cooling fin formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal is rotatably provided, the cooling fin does not directly blow into the milling chamber but indirectly with the cooling fin. The rice grains in the milling chamber can be cooled.

  That is, by circulating the outside air to the cooling fins, the milling roll is first cooled, and then the temperature of the rice grains in the milling chamber is indirectly reduced by about 1 to 2 ° C. by the heat conduction of the milling roll. Can be refined while maintaining at 30 ° C. Similar to the techniques described in Patent Document 1 and Patent Document 2, in addition to the effect of preventing cracking when rice grains are discharged outside the machine, the structure of conventional pipes and the like is simplified to reduce costs. It can be made.

  In addition, the weight of the milling cylinder is not increased as in the prior art, and the outer shell of the grain mill itself is not enlarged.

The perspective view which shows the whole of a vertical grinding-type rice mill. A partially broken side view of a vertical grinding rice mill. The expanded longitudinal cross-sectional view of a rice mill part (a cooling fin is a horizontal direction). The expanded longitudinal cross-sectional view of a rice mill part (a cooling fin is a vertical direction). Exploded view of the fine roll (cooling fins in the horizontal direction). Exploded assembly drawing of the milling roll section (cooling fins in the vertical direction). The schematic sectional drawing which shows the modification at the time of embedding a cooling fin.

Embodiments of the present invention will be described.
FIG. 1 is a perspective view of a vertical grinding type rice milling machine according to the present invention, and FIG. 2 is a partially broken side view of the grinding type grinding rice milling machine.
The vertical grinding rice mill 1 includes a rice milling unit 2, a storage tank unit 3, a boulder unit 4, a cerealing unit 5, and a control unit 6.
The storage tank unit 3, the rice milling unit 2, and the boulder unit 4 are arranged on a rice milling unit base 7, and the cerealing unit 5 is supported by the cerealing unit base 8. Reference numeral 9 denotes an upper work bench, and reference numeral 10 denotes a lower work bench.

  The milled rice part 2 (FIG. 2) has a milling shaft 12 suspended from the machine base 11 rotatably, a milling roll unit 13 concentrically attached to the milling shaft 12, and a gap from the milling roll unit 13. The main part is composed of a concentric whitening cylinder portion 14, a whitening chamber 15 formed in the gap between the finening roll portion 13 and the whitening tube 14, and a pressure adjusting portion 16 for adjusting the pressure in the whitening chamber 15. Is done.

  3 and 4 are enlarged vertical sectional views of the rice milling section, and FIGS. 5 and 6 are exploded views of the milling roll section. The configuration of the rice milling section 2 will be described in detail with reference to these drawings.

  The machine base 11 is provided with a cylindrical shaft 17 in which an upper bearing 18 and a lower bearing 19 are housed, and the shaft 12 is inserted into the cylindrical shaft 17 so as to rotatably support the shaft 12. Can do. A driving pulley 20 is mounted on the lower portion of the shaft 12, and the fine roll unit 13 is mounted on the upper portion of the shaft 12.

  The fine roll section 13 is composed of a plurality of members, and from the lower side, a roll receiving base 21 serving as a pedestal, a base 22 placed so as to be fitted to the roll receiving base 21, and on the base 22 And a tightening bolt 24 for fastening each member to the shaft 12.

  In this example, superabrasive grains made of cBN abrasive grains or diamond abrasive grains on the surface of a metal base metal 22 (for example, if the metal carbon steel (S45C) has a bulk specific gravity of 7.4). It has a superabrasive grain layer formed by electrodeposition. By having this superabrasive layer, it is formed on a grinding-type fine roll. The metal base metal 22 may be formed in a single layer, or may be formed by stacking two, three, or a plurality of layers.

  As shown in FIGS. 3 and 4, the roll cradle 21 is formed in an annular shape, and a convex ring portion 26 into which the base metal 22 is fitted, and a whitening chamber in the outer peripheral direction from the convex ring portion 26. A rice grain placement portion 27 that protrudes toward the side 15 and receives the rice grains in the polishing chamber 15; a central boss portion 28; a plurality of arms 29 that connect the boss portion 28 and the convex ring portion 26; And a plurality of air circulation ports 30 formed in the gaps between the arms 29.

  The base metal 22 is formed in a hollow cylindrical shape, and is formed into a thick body having a thickness of 20 mm or more and 60 mm or less. The lumen of the base metal 22 forms an air passage 22a through which air can flow. Further, a plurality of annular grooves 22c are formed in the inner peripheral surface 22b of the base metal 22 from the inner peripheral surface 22b toward the outer peripheral surface (see FIG. 3), and a ring shape or semicircle is formed in the groove 22c. The cooling fins 60a and 60b are embedded so as to be fitted.

  The groove 22c drilled in the inner peripheral surface 22b of the base metal 22 has a depth of about one-half to about one-third of the thickness of the base metal 22, for example, a depth in the range of 8 mm to 30 mm. It is effective for weight reduction and can be created by boring tools by lathe processing or other metal working tools. That is, a material for the inner peripheral surface 22b of the base metal 22 having a relatively large bulk specific gravity is cut to form a groove 22c, and the cooling fins 60a, 60b, 60c having a small bulk specific gravity are embedded in the groove 22c. The gold 22 can be reduced in weight. In addition to carbon steel (bulk specific gravity 7.4), the base metal 22 is made of aluminum alloy (bulk specific gravity 2.5 to 2.8), resin (bulk specific gravity 1.0 to 1.7). ), Carbon fiber (carbon fiber, bulk specific gravity of 1.4 to 1.7), or the like can be used.

  On the other hand, as the material of the cooling fins 60a and 60b, a material softer than the material of the base metal 22 is preferably used. For example, aluminum, copper, and foam metal that are good heat conductors can be employed. As the foam metal, it is preferable to use, for example, foam aluminum manufactured by Shinko Steel Wire Co., Ltd., trade name “Alporus” (registered trademark). The properties of this foamed aluminum, trade name “Alporus” (registered trademark) are excellent in lightness, mechanical properties (rigidity, cushioning properties), thermal properties (heat insulation properties), and noise reduction. Since the internal structure is an aggregate of closed cells, the bulk specific gravity is as small as 0.2 to 0.42, and is used for automobile roof members and the like in order to reduce the weight of metal materials.

  When the cooling fins 60a and 60b are embedded in the groove 22c of the base metal 22, the cooling fins 60a and 60b are inserted from the large-diameter opening 22d of the base metal 22 (see FIG. 4, for example, a large opening having a diameter of about 400 mm). If inserted, the cooling fins 60a and 60b can be fitted into the groove 22c. Since the cooling fins 60a and 60b are made of a soft material, even if the fitting intersection is an interference fit, the cooling fins 60a and 60b can be easily fitted or fixed using an adhesive or the like.

  Next, with reference to FIG.5 and FIG.6, the modification in case the shape of the cooling fin 60 is formed in the elongate plate shape is demonstrated.

  As shown in FIGS. 5 and 6, the cooling fin 60 is formed in a long plate shape 60 c... And embedded in a groove 22 c (FIG. 5) of the base metal 22, thereby longitudinally extending the inner cavity of the base metal 22. An air passage 22a is formed in the direction. That is, as compared with the ring-shaped or semicircular cooling fins 60a and 60b in FIGS. 3 and 4, the obstacle (an object provided in the horizontal direction) that blocks the air passage (vertical flow path) of the air passage 22a. ), The cooling efficiency is improved.

  The long plate-like cooling fins 60 c are embedded in the grooves 22 c of the base metal 22 as follows. That is, referring to FIG. 6, a long groove 22c in the vertical direction is formed in the inner peripheral surface 22b of the base metal 22, and a plurality of the long grooves 22c are provided in the circumferential direction.

  Then, a plurality of long plate-like cooling fins 60c are inserted through the large-diameter opening 22d (see FIG. 6, for example, a large opening having a diameter of about 400 mm), and drilled in the inner peripheral surface 22b of the base metal 22. It can be fitted in the groove 22c. Since the cooling fins 60c are made of a soft material, they can be easily fitted even if the fitting intersection is an interference fit, or can be fixed using an adhesive or the like.

  In the examples shown in FIGS. 3, 4, 5, and 6, the end surfaces of the cooling fins 60 a, 60 b, and 60 c are shown protruding from the inner peripheral surface 22 b of the base metal 22. Without being limited to this, the modification shown in FIG. 7 may be used. FIG. 7A shows a modification in which the inner peripheral surface 22b and the cooling fin 60 are embedded in a flush manner. In FIG. 7B, the inner peripheral surface 22b is slightly recessed in the outer peripheral direction. In addition, the cooling fins 60 can be embedded.

  The roll pressing member 23 is formed in an umbrella-like shape so as to uniformly guide and diffuse the raw brown rice introduced from the raw material supply port 39 (FIG. 3) into the milling chamber 15 located in the circumferential direction. The convex part 40 (FIG. 3) on the periphery is fitted into the concave part of the base metal 22, and the bolt 24 is inserted into the shaft 12 from the center via the stopper member 41 and screwed. Thereby, the roll receiving base 21, the base metal 22, and the roll pressing member 23 are fixed to the flange shaft 12.

  A space surrounded by the roll pressing member 23 and the base metal 22 is an air passage 22a.

  The top plate 44 of the machine base 11 is provided with a discharge port 45 for discharging the air discharged into the inner cavity of the fine roll unit 13, and a communication pipe 46 for discharging the air outside the device is connected to the discharge port 45. To do. Further, a suction fan 47 is attached to the end of the communication pipe 46, so that when the suction fan 47 is operated, outside air is taken in from the secondary air intake 42 of the machine base 11, and the air discharge port 43 is opened. Then, it is discharged into the air passage 22a.

  In the air passage 22a, the fine roll unit 13 is air-cooled by the outside air taken in through the cooling fins 60a, 60b, 60c, and further, the outside air passes through the air circulation port 30 and air-cools the roll cradle 21. Become. This roll cradle 21 has a rice grain placement portion 27 that is in contact with the rice grains in the milling chamber 15, and by air cooling the roll cradle 21, the heat of the rice grains in the milling chamber 15 is transferred by heat conduction. It can be removed efficiently. Thereafter, the outside air is collected at the discharge port 45 and discharged from the suction fan 47 through the communication pipe 46.

  A white tube portion 14 is disposed around the fine roll portion 13. The white tube portion 14 can be divided into two parts in the vertical direction, and is formed by an upper white tube portion 48 on the upper side and a lower white tube portion 49 on the lower side. The assembly of the upper white tube portion 48 and the lower white tube portion 49 can be easily removed with a fastening member such as a bolt.

  Similarly, the base 11 and the lower white tube portion 49 can be easily detached by a fastening member such as a bolt. Since no air passage is formed on the outside of the white tube portion 14, the weight is light and the white tube portion 14 can be easily detached from the machine base 11. Therefore, the labor for exchanging and assembling the base metal 22 can be reduced.

  An agitating blade 56 for agitating air may be planted on the back surface of the roll cradle 21, and the rotation of the agitating blade 56 agitates the outside air filled in the inner cavity of the fine roll portion 13 to improve efficiency. Can cool well.

  Reference numeral 50 denotes a temperature sensor for monitoring the surface temperature in the vicinity of the rice grain mounting portion 27 of the roll cradle 21 (for example, a non-contact type laser thermometer may be used), whereby the suction is performed. It is possible to check the operation status of the fan 47 and to monitor whether or not the outside air flow path is blocked.

  A discharge port 51 for discharging rice grains from the whitening chamber 15 is provided at the lower part on the front side of the lower whitening cylinder portion 49. A discharge rod 52 is provided in connection with the discharge port 51, and the pressure adjusting unit 16 is disposed. The pressure adjusting unit 16 includes a resistance plate 53 that opens and closes the discharge port 51 and a load mechanism (not shown) such as a weight or an air cylinder, and the discharge port is closed in the closing direction by the operation of the load mechanism. By energizing 51, the wrinkle accuracy can be controlled.

  The lower end of the discharge basket 52 is connected to a connecting duct 54, and a mixture of rice grains and rice bran is supplied from the connecting duct 54 to the stone block 4. The ganishi portion 4 has a configuration in which a sieve is inclined and the rice grains and the straw are screened by driving a vibration device (not shown).

  The operation of the above configuration will be described. The brown rice stretched in the storage tank unit 3 (FIGS. 1 and 2) is subjected to the milling action by grinding in the milled rice unit 2, and then reaches the boulder unit 4 through the discharge port 51, the discharge basket 52 and the connecting duct 54. . In the Mangoku part 4, the straw is separated and only the rice grains are transferred to the lower part of the cereal part 5. Then, the cerealing unit 5 returns the rice grains to the upper part of the storage tank unit 3 and repeats the circulation in which the rice milling unit 2 receives the milling operation by grinding again. The circulation is repeated until the raw brown rice is finished to the target yield.

  In this way, the rice milling action for obtaining high-milled sake rice with a yield of 70% or less is such that while the rice milling action proceeds in the rice milling part 2, the grain of rice is subjected to the cutting action of the milling roll part 13 and the grain temperature is increased. To rise. However, when the suction fan 47 (FIG. 3, FIG. 5) is operated, outside air is taken in from the secondary air intake 42, and outside air is discharged through the air discharge port 43 to the air passage 22 a in the fine roll unit 13. When outside air is circulated through the air passage 22a in the inner cavity of the milling roll 13, the base metal 22 is cooled via the cooling fins 60a, 60b, 60c, and the heat of rice grains generated in the milling chamber 15 by heat conduction is efficiently used. Remove well.

  Then, the outside air in the inner cavity of the fine roll part 13 sequentially passes through the air circulation port 30 and also air-cools the roll cradle 21. Since the roll pedestal 21 is in direct contact with the rice grains in the lower part of the milling chamber 15 by the rice grain placement unit 27, the heat of the rice grains in the milling chamber 15 is efficiently conducted by heat conduction by cooling the roll cradle 21. Can be removed well.

  The air flowing out from the air circulation port 30 of the roll cradle 21 is collected in a discharge port 45 formed in the top plate 44 and discharged from the communication pipe 46 to the outside through the suction fan 47. .

  By circulation of the outside air to the inner cavity of such a milling roll part 13, the temperature of the rice grains in the milling chamber 15 can be reduced by about 1 to 2 ° C, and the grain can be refined while maintaining the grain temperature at about 30 ° C. This is similar to the technology described in Patent Document 1 and Patent Document 2 described above, and in addition to the effect of preventing cracking when rice grains are discharged outside the machine, it reduces the cost by simplifying the air channel structure than before. It can be made.

  Further, the laser thermometer 50 attached to the machine base 11 constantly monitors the surface temperature in the vicinity of the rice grain placement unit 27 of the roll cradle 21. For example, the surface temperature of the rice grain placement unit 27 is 30 to 30. If it is in the range of 40 degreeC, it can be judged that the external air is distribute | circulating normally to the inner cavity of the fine-rolling roll part 13. FIG. For example, if the temperature of the laser thermometer 50 exceeds 40 ° C., it is determined that the temperature rise in the whitening chamber 15 is excessive, and the suction fan 47 may be broken (for example, motor burnout). It is necessary to doubt that the paths such as the secondary air inlet 42 and the air outlet 43 are blocked. For example, when the temperature of the laser thermometer 50 exceeds 40 ° C., an alarm is notified, or the entire operation is stopped in conjunction with a drive source (such as a drive motor, not shown) that drives the rice mill 2. It is preferable to take measures.

  As described above, according to the present embodiment, the hollow cereal roll 13 is rotatably mounted in the whitening cylinder 14, and the cereal roll 13 has a superabrasive layer on the outer peripheral surface. While formed from the base metal 22, the inner peripheral surface 22b of the base metal 22 is formed by burying cooling fins 60a, 60b, 60c formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal 22. Therefore, the inner peripheral surface of the base metal having a large bulk specific gravity is shaved to form a groove, and cooling fins with a small bulk specific gravity are embedded in the groove. It becomes possible to cool indirectly from the inner cavity of a cereal roll, without enlarging the outer shell.

  In particular, since the air passage 22a is formed in the lumen of the milling roll portion 13, the direct passage of air into the milling chamber 15 is not performed and the inside of the milling chamber 15 is indirectly performed from the lumen of the milling roll portion 13. Rice grains can be cooled. As a result, the air path structure is simplified to reduce the cost, and the air path is not formed outside the white tube as in the prior art, so that the weight of the white tube is not increased.

  The present invention can be applied to a vertical grinding rice mill for sake brewing having a non-porous milling cylinder.

DESCRIPTION OF SYMBOLS 1 Vertical grinding type rice milling machine 2 Rice milling part 3 Storage tank part 4 Mangoku part 5 Graining part 6 Control part 7 Rice milling part base 8 Graining part base 9 Upper workbench 10 Lower workbench 11 Machine bed 12 Shaft 13 Milling roll section 14 Milling cylinder section 15 Milling chamber 16 Pressure adjusting section 17 Tube shaft 18 Upper bearing 19 Lower bearing 20 Drive pulley 21 Roll receiving base 22 Base 23 Holding member 24 Tightening bolt 26 Convex ring section 27 Rice grain mounting section 28 Boss portion 29 Arm 30 Air circulation port 39 Supply port 40 Protruding portion 41 Stopping member 42 Secondary air intake port 43 Air discharge port 44 Top plate 45 Discharge port 46 Communication tube 47 Suction fan 48 Upper white tube portion 49 Lower white tube portion 50 Temperature sensor 51 Discharge port 52 Discharge trough 53 Resistance plate 54 Connection duct 56 Stirring blade 60 Cooling fin

Claims (6)

  A hollow cylindrical flour roll that is rotatably mounted in a milling cylinder, and the flour roll is formed from a base metal having a superabrasive layer on the outer peripheral surface, while the inner peripheral surface of the base metal The cereal roll is characterized in that a cooling fin formed with a bulk specific gravity smaller than the bulk specific gravity of the base metal is embedded.   The cereal roll according to claim 1, wherein the base metal is a thick metal body having a thickness of 20 mm to 60 mm.   The cooling fin is made of foam metal, and is embedded at a depth of approximately one-half to one-third of the thickness of the base metal from the inner peripheral surface to the outer peripheral surface of the base metal. The cereal roll of Claim 1 or 2.   4. The cooling fin according to claim 1, wherein the cooling fin is formed in a ring shape or semicircular shape, and a plurality of the cooling fins are embedded in a horizontal direction and in a multi-stage shape with respect to the inner peripheral surface of the base metal. Crab roll according to crab.   4. The cooling fin according to claim 1, wherein the cooling fin is formed in a long plate shape, and a plurality of the cooling fins are embedded in a vertical direction and a circumferential direction with respect to the inner peripheral surface of the base metal. The cereal roll as described in.   A cereal roll is rotatably mounted in a standing non-porous milling cylinder, and a gap between the milling roll and the milling cylinder is formed in the milling chamber, and a supply port and a drain communicating with the milling chamber are formed. A vertical grinding type pulverizer provided with an outlet, wherein the pulverizing roll according to any one of claims 1 to 5 is rotatably provided in the pulverizing cylinder. Cereal machine.

Images