JP2020025903A - Grinding type vertical grain milling machine - Google Patents

Abstract

To provide a grinding type vertical grain milling machine which easily removes bran in a low whiteness area.SOLUTION: A grinding type grain polishing roll 6 is configured in a such manner that plural grinding wheels 12 are overlapped, a strut 18 supporting a bran removal wire mesh tube 16 is provided with a grain polishing chamber resistor 32 which is included in a grain polishing chamber 17, and the grain polishing chamber resistor 32 is shaped along an outer peripheral surface shape of the grinding type grain polishing roll 6. In the case that the grinding type grain polishing roll 6 is configured in a such manner that plural grinding wheels 12 having a truncated conical shape are overlapped, the grain polishing chamber resistor 32 is preferably formed into a serrated shape when viewed in an axial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grinding type vertical grain mill in which a grinding type whitening roll is mounted on an upright spindle.

  The grinding type vertical grain mill is equipped with a grinding type whitening roll, which is a grindstone, mounted on the main shaft in an erecting rice bran netting cylinder, and the space between the rice bran removing netting and the grinding type whitening roll is used as a whitening chamber. The basic structure is such that one end is connected to a grain supply section and the other end is connected to a grain discharge section. It has features such as strong refining action and easy processing of residual kernels because the refining chamber is vertical. On the other hand, since the refining chamber is of a vertical type, the action of the natural fall of the grain is strong, and the grain is discharged without receiving a sufficient grinding action, or unevenness occurs in the refining action. Various devices have been devised to solve this situation.

  In the grain mill of Patent Literature 1, diamond grinders having different diameters are alternately superimposed and mounted on a shaft in a grain mill outer casing, and the outer casing is opposed to the outer inclined surface of the diamond grinder with a space therebetween. Wire mesh is placed. Further, Patent Document 1 discloses a structure in which an inclined plate is provided in a portion having no wire mesh so that grains are sequentially sent downward only from the inclined plate portion to suppress the movement of grains.

  In the grinding type vertical grain mill of Patent Document 2, a plurality of columns and a polishing chamber resistor arranged on each of these columns are provided around the bran-removing wire mesh tube, and the grinding chamber resistor is ground. It is a long plate extending in the axial direction of the formula polishing roll, and is formed so that its cross section is bent like a hook (key), and the base end of the cross section is rotatably supported by the column. The bent portion of the cross section acts to suppress the movement of the moving grain and impart resistance thereto. Thereby, the receiving action of the grain is stabilized, and the bran in the streak groove on the dorsal side of the long grain rice grain can be almost completely removed.

  However, in Patent Literature 2, since the outer peripheral surface of the grinding-type whitening roll and the end surface of the whitening chamber resistor have a substantially vertical shape when viewed in a longitudinal section, the backside bran is There are various problems such as difficulty in removal and troublesome adjustment of the gap between the outer peripheral surface of the grinding-type whitening roll and the end surface of the whitening chamber resistor.

Japanese Patent Publication No. 27-4118 JP 2017-23962 A

  In view of the above problems, an object of the present invention is to provide a grinding type vertical grain mill capable of easily removing bran.

In order to solve the above-described problems, the present invention provides a spindle that is rotatably provided in an erecting bran metal mesh cylinder, a grinding-type whitening roll is mounted on the spindle, and a grinding-type whitening roll is placed between the bran-free metal mesh cylinder and the grinding-type fine polishing roll. Is formed in a milling chamber, one end of which is connected to a grain supply unit, and the other end of which is connected to a grain discharge unit, in a grinding type vertical grain mill,
The grinding-type whitening roll is one in which a plurality of grindstones are stacked, and a column supporting the bran removing wire mesh tube is provided with a whitening room resistor existing in the whitening room, and the whitening room resistor, Technical means of forming the grinding type whitening roll into a shape along the outer peripheral surface shape was taken.

  The invention according to claim 2 is characterized in that the grinding-type whitening roll includes a plurality of frustum-shaped grinding wheels stacked one on another.

  The invention according to claim 3 is characterized in that the polishing chamber resistor is formed in a saw-tooth shape so as to follow the outer peripheral surface shape of the grinding-type polishing roll.

  According to the first aspect of the present invention, a support for supporting the bran-removing wire mesh tube is provided with a whitening chamber resistor that can freely enter and leave the whitening chamber, and the whitening chamber resistor is provided on the outer peripheral surface of the grinding-type whitening roll. Because it was formed in a shape that conformed to the shape, even if the outer peripheral surface shape of the grinding wheel was uneven (uniform), the grains were uniformly captured by the whitening chamber resistor, and the back of the rice grain was Increases the number of times of contact with the grinding wheel, and is suitable for promoting the removal of bran in the streak grooves on the back side of the grain in the low whiteness area or removing streak grooves .

  If the grinding-type whitening roll has a plurality of truncated conical grinding wheels, the width of the whitening chamber changes in the vertical direction from wide, narrow, wide, narrow. Therefore, the rice grains that flow down are repeatedly sparse, dense, sparse, and dense, so that the rice grains flow (revolve and rotate) very actively under low pressure, and the back of the rice grains contact the grinding wheel. The number can be increased.

  Furthermore, if the polishing chamber resistor is formed in a sawtooth shape so as to follow the outer peripheral surface shape of the grinding-type whitening roll as described in claim 3, the outer peripheral surface shape becomes uneven when a plurality of grinding wheels are provided. Even an integrated grinding-type whitening roll can be uniformly brought close to the respective outer peripheral surfaces of the respective grinding wheels. In other words, the conventional long-plate-shaped whitening chamber resistor extending in the axial direction cannot cope with a grinding-type whitening roll having an uneven outer peripheral surface, and it is difficult to adjust the gap. With the described shape, even if the outer peripheral surface shape is uneven, the end face of the whitening chamber resistor can be appropriately adjusted so as to follow the outer peripheral surface shape of each grinding stone disc, so that the gap can be easily adjusted. it can.

It is a schematic sectional view showing the whole composition of a grinding type vertical grain machine. It is a perspective view of a grinding type vertical grain mill which shows a part disassembled. It is a cross-sectional view of a grinding type vertical grain mill. It is sectional drawing which shows the internal structure of a biasing device. It is an expanded sectional view showing an important section of the present invention. It is a perspective view of a refinement room resistor. It is an example figure of the grinding type vertical grain mill of other embodiment of this invention, and explanatory drawing of Example 2. It is an example figure of the grinding type vertical grain mill of other embodiment of this invention, and is explanatory drawing of Example 3.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view of the overall configuration of a grinding type vertical grain mill 1, FIG. 2 is a perspective view of the grinding type vertical grain mill 1, and FIG. FIG. 4 is a cross-sectional view showing the internal structure of the biasing device, FIG. 5 is an enlarged cross-sectional view showing a main part of the present invention, and FIG. 6 is a resistance device. It is a perspective view of.

  Referring to FIG. 1 to FIG. 3, in a vertical grinding machine 1 of the present embodiment, a main shaft 3 is erected substantially at the center of a main body base 2 by an upper bearing portion 4 and a lower bearing portion 5. A plurality of grinding-type whitening rolls 6 (hereinafter, whitening rolls 6) are placed and fixed directly above the section 4 to form a main milling section. The main shaft 3 is driven by a motor 8 fixed to a motor base 7 attached to the main body base 2 via a motor pulley 9, a main shaft pulley 10, and a V-belt 11.

The polishing roll 6 is formed by laminating a plurality of grinding wheels 12 attached to the main shaft 3 and spacers 13 interposed between the grinding wheels 12. A cutting edge for grinding (abrasive grains of a grinding wheel) is fixed on the entire peripheral surface of the grinding wheel 12 by means such as sintering. The spacer 13 may be provided with a blowing port 13a (see FIG. 3) for blowing toward the cutting blade from between the plurality of laminated grinding wheels 12, and by forming the blowing port 13a, The air taken in from the outside can be used for the bran removal blast to promote the removal of bran during milling.
At the upper end of the whitening roll 6, a feed roll 14 for raw material is mounted on the main shaft 3. A screw blade 15 is provided on the outer peripheral surface of the feed roll 14, and the raw material can be fed by rotation of the screw blade 15.

  A bran removing wire mesh tube 16 (FIG. 1) is erected around the whitening roll 6 at a predetermined interval. Then, a refining chamber 17 is formed between the bran removing wire netting 16 and the refining roll 6. In this embodiment, the bran removing wire mesh tube 16 is vertically divided into four parts, and each side edge is fixed by four pillars 18 erected around the milling roll 6. Further, a bran removing chamber cover 19 is attached between the columns 18 to form a bran removing chamber 20. 1 and 2, reference numeral 21 denotes a support cover.

  A supply cylinder 22 for guiding the raw material is mounted on the support column 18. The supply cylinder 22 surrounds the feed roll 14, and is provided with a hopper cylinder 23 above the supply cylinder 22, and has an opening 24 in the upper wall of the hopper cylinder 23. Inside the hopper cylinder 23, there is provided a hollow cone-shaped guide body 25, and a supply amount adjustment device 27 comprising two perforated rotation plates which are rotated by an adjustment lever 26 above the guide body 25.

  At the lower end of the refining chamber 17, a part of the bran-removing wire mesh tube 16 is opened to form a discharge port 28, and a discharge gutter 29 is provided connected to the discharge port 28. The discharge gutter 29 is provided with a lid 31 operated by a weight lever 30. In this embodiment, the lid 31 is biased by the weight lever 30, but the present invention is not limited to this. For example, as an alternative to the weight lever 30, the lid 31 may be urged by an air cylinder. A configuration is also conceivable in which rice is allowed to flow out of the lid 31 without any load without providing the weight lever 30 or the air cylinder.

  The refining chamber 17 is provided with protruding refining chamber resistors 32 disposed on each of the plurality of columns 18. The whitening chamber resistor 32 is a long plate extending in the axial direction of the grinding whitening roll 6, and is formed so that its cross section is bent like a hook. The cleaning chamber resistor 32 shown in FIGS. 3, 4 and 6 has a substantially L-shaped cross section. However, the cleaning chamber resistance plate 32 is not limited to the L-shape, but may be a hook (key) shape. Various shapes such as a "" shape and a "U" shape can be adopted.

  In the present embodiment, the polishing chamber resistor 32 having a substantially L-shaped cross section has a tip portion 33 close to the outer peripheral surface of the grinding and polishing roll body 6. As shown in FIGS. 1, 5 and 6, when the grinding wheel 12 of the polishing roll 6 has a frustoconical shape having different diameters, the shape of the tip 33 is formed in a saw-toothed step. Good to be. The tip 33 is oriented in the direction of the center of the grinding wheel 12 (in the direction of the main shaft 3), and the L-shaped bent portion 34 (FIG. 4) imparts such resistance as to suppress grains moving by the rotation of the whitening roll 6. Play a role. A base end 35 on the other side of the distal end 32 is rotatably supported with respect to a longitudinal axis 36 provided inside the column 18.

  That is, the biasing device 37 is provided in the polishing chamber resistor 32. The urging device 37 is an air actuator, and includes an air cylinder 38, a movable rod 39, and a pressure adjusting device 40, as shown in FIGS. The air cylinder 38 has a mounting portion 41 at one end rotatably mounted on a coupling block 42 on the pressure regulating device 40 side by a shaft 43, and the other end rotatably connected to the whitening chamber resistor 32 by a free joint structure 44. I have. The refining chamber resistor 32 is rotatably supported on a longitudinal axis 36 having one end mounted on the support column 18. The proximity distance of the tip 33 to the surface can be adjusted.

  A branch pipe No. 1 is connected to the air cylinder 38 from a compressor 45 via a regulator 46, and air pressure is supplied to the inside of the air cylinder 38. This air pressure can be adjusted by the regulator 46. The branch pipes No1 to No4 are connected to the regulator 46. In this embodiment, the branch pipes are connected to the air cylinders 38 of the four urging devices 37, respectively. Therefore, each of the whitening chamber resistors 32 receives the air pressure and rotates about the vertical axis 36, thereby suppressing the movement of the grain.

  An annular bran collecting chamber 47 is formed below the bran removing chamber 20 of the grinding type vertical grain mill 1 (see FIG. 1), and a scraping blade 48 that is rotated integrally with the polishing roll 6 is provided. . A bran discharge port (not shown) is provided at the bottom of the bran collecting chamber 47 to discharge bran. Further, a bran collecting fan 49 is attached to a lower portion of the main shaft 3, and sucks air from a supply port or the like on the upper part of the machine body through the bran removing chamber 20 and discharges the air to the outside together with the bran.

Hereinafter, a specific operation in the present embodiment will be described. Raw rice grains (brown rice) supplied from a chute (not shown) to the inlet 24 (see FIG. 1) are adjusted to an appropriate supply flow rate by the adjustment lever 26 and are evenly dispersed in the circumferential direction by the guide body 25. While being supplied to the upper part of the refining chamber 17.
In the refining chamber 17, the rice grains come into contact with the peripheral surface of the refining roll 6 while rotating (revolving and rotating) under relatively low pressure due to the rotation of the refining roll 6 (the direction of arrow R shown in FIG. 3). By doing so, the surface layer can be shaved.

At this time, the raw rice grains supplied to the refining chamber 17 are pushed out to the refining roll 6 side by the extension of the movable rod 39 of the air cylinder 38 by the plurality of refining chamber resistors 32 disposed in the refining chamber 17 and the refining is performed. The tip 33 of the chamber resistor 32 approaches the outer peripheral surface of the whitening roll 6, whereby the grains that move with the whitening roll 6 are captured and move to the bent portion 34 side of the whitening chamber resistor 32. To control grain movement. That is, the grain is given a resistance that suppresses movement in the circumferential direction in the whitening chamber 17 (see FIG. 5).
In the present embodiment, the tip portion 33 of the whitening chamber resistor 32 is close to the outer peripheral surface of the whitening roll 6 and the bent portion 34 captures the kernel, so that the kernel receiving action is stabilized, and the kernel is stabilized. The bran in the streak-like grooves on the back of the grains is sufficiently removed.

  The grindstone disc 12 shown in FIGS. 1 and 5 has a circular truncated cone shape having different diameters, and is attached to the main shaft 3 with the smaller diameter facing downward and the larger diameter facing upward to perform polishing. It is formed on a roll 6. Then, when the whitening roll 6 is rotated, the rice grains can flow (revolve / rotate) very actively under low pressure. At this time, the sawtooth-shaped tip portion 33 of the whitening chamber resistor 32 approaches the outer peripheral surface of the plurality of grinding wheels 12, and the grain is captured by the bent portion 34, so that the back surface of the rice grains contacts the grinding wheel 12. It is suitable for increasing the number of times to promote the removal of bran in the streak grooves on the dorsal side of the grain or to remove the streak grooves.

  Further, if the shape of the tip 33 of the whitening chamber resistor 32 is formed in a saw-tooth shape, even in the case of a grinding-type whitening roll in which a plurality of truncated cone-shaped grindstones are stacked, the tip is formed on the outer peripheral surface of each of the grinding stones. And the gap between the outer peripheral surface of the grinding-type whitening roll and the end surface of the whitening room resistor can be easily adjusted.

In the refining chamber 17, four refining chamber resistors 32 are arranged in the circumferential direction. The same operation as when a plurality of polishing chambers 17 (milling sections) are formed for each of the polishing chamber resistors 32 occurs (that is, four polishing chambers (a plurality of polishing chamber resistors 32) are provided in one mill. , There is a milling section divided between 32). In other words, while the rice grains are received by the whitening chamber resistor 32, the whitening roll 6 is rotated in the rotation direction R and the surface layer of the rice grains is shaved, so that an independent milling action is generated for each milling section. As described above, since the milling operation is independent for each milling section, the weight lever 30 in the vicinity of the outlet 28 for rice grains is not required, and the manufacturing cost can be reduced. In addition, even when rice grains are allowed to flow out of the lid 31 with no load by the weight lever 30 and almost no load, the bran in the streak-like groove on the back side of the grains is sufficiently removed. Become.
In the embodiment of FIG. 3, the four whitening chamber resistors 32 are arranged in the whitening chamber 17 in the circumferential direction. However, the present invention is not limited to this. A polishing chamber resistor 32 may be provided. In accordance with this, the bran-removing wire mesh cylinder 16 is not limited to the four-part division, but can be set to an appropriate number such as six to ten percent.

  Further, for some reason, in a high pressure state in which crushing occurs in the refining chamber 17, the movable rod 39 is pressed against the air pressure via the refining chamber resistor 32 by the compressive force of the kernel. . Then, the pressure inside the air cylinder 45 increases, but this pressure change is adjusted by the regulator 46 to prevent the movement of the grain from being excessively suppressed.

Although the air cylinder 45 is used as the operating means as the urging device 37, the invention is not limited thereto, and a manual dial 60 with a scale (see FIG. 6) may be used. As the dial 60 with a scale, a dial hand knob of Imao Corporation, model: DHK100, model: D75R1 / 25, etc. can be adopted. The scaled dial 60 is rotatably mounted on a coupling block 61 by a shaft 62, and is rotatably connected to the whitening chamber resistor 32 by a free joint structure 63. The refining chamber resistor 32 is rotatably supported at one end by a longitudinal axis 64 provided near the column 18. The proximity distance of the tip portion 33 to the outer peripheral surface can be adjusted.
By using such a manual dial 60 with a scale, the gap can be easily managed with a simple configuration, with less error in adjustment by the operator.

  During the milling operation, the outside air sucked from the hopper cylinder 23 by the fan 49 for collecting rice passes through the rice-removing roll 6 and passes through the rice-removing chamber 21 and is drawn downward, so that the rice-removing effect is enhanced while the rice-removing effect is enhanced. Promotes agitation and suppresses an excessive rise in rice temperature.

  As described above, according to the present embodiment, in the grinding type vertical grain mill 1, the grinding type whitening roll 6 includes a plurality of grinding wheels 12, and the periphery of the bran removing wire mesh tube 16 is A polishing chamber resistor 32 disposed on a support is provided, and the cleaning chamber resistor 32 has a shape conforming to the outer peripheral surface shape of the grinding-type whitening roll 6. Even if they are uniform, the grains are uniformly captured by the whitening chamber resistor, the number of times the back of the rice grains contacts the grinding wheel increases, and the grains in the low whiteness area It is suitable for facilitating the removal of bran in the streak-like groove on the back side or for removing the streak-like groove.

  When the grinding-type whitening roll 6 is formed by stacking a plurality of truncated conical grinding wheels 12, the coarse / dense state of rice grains in the vertical direction in the whitening chamber 17 is repeated many times. Can flow very actively under the low pressure (revolution / rotation), and the number of times that the back surface of the rice grain contacts the grinding wheel can be increased.

  Furthermore, if the polishing chamber resistor 32 is formed in a saw-tooth shape so as to follow the outer peripheral surface shape of the grinding-type whitening roll 6, the outer peripheral surface shape becomes uneven when a plurality of grinding stone disks 12 are stacked. Even a grinding-type whitening roll can be uniformly brought close to the respective outer peripheral surfaces of the respective grinding wheels 12. In other words, the conventional long-plate-shaped whitening chamber resistor extending in the axial direction cannot cope with the grinding-type whitening roll having an uneven outer peripheral surface, and it is difficult to adjust the gap. For example, even if the outer peripheral surface is uneven, the gap can be easily adjusted because the end surface of the whitening chamber resistor can be appropriately adjusted along the outer peripheral surface shape of each grinding wheel.

  FIG. 7 is an example of a grinding type vertical grain mill according to another embodiment of the present invention, which employs a frusto-conical grinding wheel 12 similar to that of the first embodiment. In the present embodiment, the polishing roller 6 was attached to the main shaft 3 with the smaller diameter facing upward and the larger diameter facing downward, and formed on the whitening roll 6. In the case of this embodiment, the rotation of the whitening roll 6 causes the rice grains to vigorously flow (revolve / rotate) under a low pressure while flowing down the inclined surface of the grinding wheel 12, thereby shaving the surface layer. Also in this embodiment, when the shape of the whitening chamber resistor 32 is formed in a sawtooth shape along the outer peripheral surface shape of the grinding type whitening roll 6, even if it is a truncated conical grinding wheel, each of the grinding wheels The gap can be easily adjusted by evenly approaching the outer peripheral surface.

  FIG. 8 is an example of a grinding type vertical grain mill according to another embodiment of the present invention, which employs a grindstone 12 whose outer peripheral surface is chamfered. Also in the present embodiment, the end surface of the whitening chamber resistor 32 has a shape that follows the outer peripheral surface shape of each grinding wheel disc 12. Referring to FIG. 8, the end face of the whitening chamber resistor 32 has a saw-toothed or wavy shape. Even with the grinding wheel 12 subjected to chamfering, the gap can be easily adjusted by evenly approaching the respective outer peripheral surfaces of the grinding wheels.

  The present invention is not limited to the above embodiments, and it goes without saying that the configuration can be appropriately changed without departing from the scope of the invention.

The present invention can be applied to a vertical or horizontal grain mill.

DESCRIPTION OF SYMBOLS 1 Grinding type vertical grain mill 2 Main body base 3 Main shaft 4 Upper bearing part 5 Lower bearing part 6 Grinding whitening roll 7 Motor base 8 Motor 9 Motor pulley 10 Main shaft pulley 11 V belt 12 Grinding disc 13 Spacer 14 Feeding roll 15 Screw blade Reference Signs List 16 bran-removing wire mesh tube 17 milling room 18 column 19 bran-removing room cover 20 bran-removing room 21 column cover 22 supply tube 23 hopper tube 24 input port 25 guide 26 control lever 27 supply amount control device 28 discharge port 29 discharge gutter 30 weight Lever 31 Lid 32 Refinement chamber resistor 33 Tip 34 Bend 35 Base 36 Vertical axis 37 Biasing device 38 Air cylinder 39 Movable rod 40 Pressure regulator 41 Mounting part 42 Connection block 43 Axis 44 Free joint structure 45 Compressor 46 Regulator 47 Nukan chamber 48 Pumping blade 49 Nukan fan 60 Dial with scale 61 Coupling block 62 Shaft 63 Free joint structure 64 Vertical axis

Claims (7)

A grinding type whitening roll is axially mounted on a main shaft rotatably provided in an erect rice bran mesh tube, and a space between the rice bran mesh tube and the grinding type whitening roll is formed in a whitening chamber. In the grain supply unit, the grinding type vertical grain mill with the other end connected to the grain discharge unit,
The grinding-type whitening roll is one in which a plurality of grinding wheels are provided, and a column supporting the bran removing wire mesh tube is provided with a whitening room resistor existing in the whitening room,
The grinding type vertical milling machine characterized in that the polishing chamber resistor is formed in a shape along the outer peripheral surface of the grinding type whitening roll.   The grinding-type vertical grain mill according to claim 1, wherein the grinding-type whitening roll has a plurality of truncated cone-shaped grinding wheels.   The grinding type vertical grain mill according to claim 1 or 2, wherein the polishing chamber resistor is formed in a saw-tooth shape so as to conform to an outer peripheral surface shape of the grinding type whitening roll.   The grinding type vertical grain mill according to any one of claims 1 to 3, wherein the whitening chamber resistor has a long plate shape extending in an axial direction of the grinding type whitening roll.   The refinement chamber resistor has a bent portion whose cross section is bent like a hook, a base end of the cross section is rotatably supported by the support, and a tip end of the cross section is each of the grindstones. 5. The grinding type vertical grain mill according to claim 4, wherein the grain moves close to the outer peripheral surface of the grain and is moved by the bent portion of the cross section so as to suppress the movement and impart resistance.   The grinding according to any one of claims 1 to 5, wherein the polishing chamber is divided into a plurality of sections in the circumferential direction by the polishing chamber resistor, and a plurality of polishing sections are formed so that independent polishing operations occur. Vertical grain milling machine.   The grain discharge section at the other end of the whitening chamber is provided with a discharge port that opens a part of the bran-removing wire mesh tube, a discharge gutter connected to the discharge port, and a lid that closes the discharge port. The grinding type vertical according to claim 6, wherein the lid is formed so that the discharge port is opened only by the outflow pressure of the grain without providing a resistance device for applying a biasing force to the lid. Type milling machine.

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