JP2018008241A - Grinding type vertical grain polishing machine - Google Patents

Abstract

The present invention provides a vertical grinding mill that can prevent uneven milling by actively making contact with a milling roll of rice grains not only on the sides of the rice grains but also on the abdomen and back of the rice grains.
A grinding-type whitening roll 9 is pivotally attached to a rotatable main shaft 5 and a grinding-type demolition wire mesh cylinder 11 is erected around the grinding-type whitening roll 9 via a gap. In the vertical grinding mill 1 formed in the chamber 14, the grinding milling roll 9 is provided with a flat portion 9 </ b> H that is a straight line segment on a part of the outer circumferential surface of a concentric cross section.
[Selection] Figure 1

Description

  The present invention relates to a grinding type vertical milling machine.

  As a conventional grain refiner, a grinding-type vertical grain refiner described in Patent Document 1 is known. In this type, a grinding-type whitening roll is attached to a rotatable main shaft, and a stripping wire cylinder is erected around the grinding-type whitening roll via a gap, and the gap is formed in a polishing room. In addition, the column that supports the dehuller wire mesh tube is provided with a long resistor that projects toward the scouring chamber and imparts resistance to the movement of the grain by rotating the grinding type whitening roll in the circumferential direction. It is provided.

  As a result, the surface of the rice grain is polished by the abrasive grains of the grinding type whitening roll, and the skin is shaved. At this time, brown rice flows in the milling room, and germination is performed such as the germ part of brown rice collides with a long resistor that protrudes from the milling room. By colliding multiple times, effective sprouting and sperm come to be performed.

  However, in the above-mentioned Patent Document 1, since the flow of rice grains is regulated in the vicinity of the elongated resistor, the rice contact with the grinding-type whitening roll is actively contacted only on the side surfaces of the rice grains, and the abdomen and back of the rice grains There was a problem that almost no contact was made, resulting in unevenness.

  That is, FIG. 6 shows a schematic diagram (FIG. 6 (a)) showing names of each part of brown rice and a cross-sectional view taken along the line AA (FIG. 6 (b)). Only the side surface SO in FIGS. 6 (a) and 6 (b) actively contacts the grinding type whitening roll, and the abdomen HA and back SE in FIGS. 6 (a) and 6 (b) are hardly contacted with the grinding type whitening roll. It becomes an unevenness. This appears remarkably in the vicinity of the long resistor, so it seems that a gap (passage) from a wide space in the whitening chamber to a narrow space in the vicinity of the long resistor has an effect.

JP 2014-18719 A

  In view of the above-mentioned problems, the present invention provides a grinding-type vertical pulverizer capable of preventing uneven milling by actively making contact with the milling roll of rice grains not only on the sides of the rice grains but also on the abdomen and back of the rice grains. Providing is a technical issue.

In order to solve the above-mentioned problems, the present invention has a grinding-type whitening roll attached to a rotatable main shaft, and a grinding-type stripping metal mesh cylinder is erected around the grinding-type whitening roll through a gap. In a vertical grinding mill with a gap formed in the milling chamber,
The grinding type whitening roll is provided with a technical means in which a flat portion that is a straight line segment is provided on a part of the outer peripheral surface of a concentric cross section.

  In the invention according to claim 2, the grinding type polishing roll is surrounded by alternately connecting a flat portion whose outer peripheral surface is a straight line segment and an arc portion whose outer peripheral surface is a curved line segment. It was.

  According to the present invention, since a flat portion that is a straight line segment is provided on a part of the outer peripheral surface of the grinding type whitening roll, the polishing chamber in the arc portion of the grinding type whitening roll, and the flat portion of the grinding type whitening roll The volume of the rice milling chamber becomes different from that of the milling chamber, and when the grinding type whitening roll is rotated, rolling of the rice grains tends to occur. That is, when the transition from the arc portion to the flat portion, the gap between the milling chambers widens and the regulation of the flow of rice grains is relaxed, while when the transition from the flat portion to the arc portions, the gap between the milling chambers narrows and the flow of rice grains is reduced. Be regulated.

  Due to such repeated action, the posture of the rice grains changes and rolls. Therefore, in addition to the side surface of the rice grain, the back, abdomen, head, and germ are also positively brought into contact with the outer peripheral surface of the grinding-type whitening roll and uniformly crushed.

  Further, as in the invention described in claim 2, the outer peripheral surface of the grinding type whitening roll is shaped so as to be surrounded by alternately connecting a flat portion as a straight line segment and an arc portion as a curved line segment. For example, when the gap between the sperm chambers is widened and when the gap between the semen rooms is narrowed, uniform semen can be efficiently performed.

It is a longitudinal cross-sectional view of the down-feed type grinding-type vertical milling machine of this invention. It is a cross-sectional view which shows a precision part same as the above. It is a top view of the grinding type whitening roll integrated in a grinding type vertical milling machine. It is a top view which shows another Example of a grinding type whitening roll. It is a schematic diagram which shows the mode of rolling of the rice grain at the time of rotation of a grinding type whitening roll. It is the schematic which shows the name of each part of brown rice, and its sectional drawing.

  A mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a bottom feed type grinding vertical milling machine according to the present invention, FIG. 2 is a transverse sectional view showing the same milling section, and FIG. It is a top view of the grinding type whitening roll incorporated.

  The grinding-type grain refiner employs a grain refinement method in which the surface of rice grains is rubbed with a file or a grindstone to cut the epidermis. The grinding-type vertical threshing machine 1 of the present invention includes a raw material supply port 2 for supplying raw brown rice from the upper part of the machine body, a grinding-type grain refiner 3 for performing grinding grain processing disposed in the center of the machine body, and a side part of the machine body. And a refined product discharge port 4 for discharging the rice grains that have been subjected to grinding and cereal processing. The discharge chute 35 in which the fine product discharge port 4 is formed is provided with a weight 36 for adjusting the pressing force of the discharge port on the upper portion thereof.

  The main shaft 5 serving as the shaft is erected substantially at the center of the main body base 8 by the upper bearing portion 6 and the lower bearing portion 7, and a number of grinding-type whitening rolls 9 are placed directly above the upper bearing portion 6 to be integrated. A typical whitening roll 10 is formed. A grinding type metal strip 11 is erected around the grinding type whitening roll 9 through a gap, and a removal cover 12 is attached around the grinding type steel strip 11 through the gap. Then, a clearance space between the grinding-type metal strip 11 and the cover 12 is formed in the removal chamber 13, while a space between the grinding-type steel screen 11 and the outer peripheral surface of the grinding-type whitening roll 9 is formed. It is formed in the semen chamber 14.

  Further, a support 15 (FIG. 2) that supports the grinding-type demetalization wire cylinder 11 protrudes toward the milling chamber 14 and provides resistance to movement of the grains in the circumferential direction of the grinding-type whitening roll 9 A body 16 is provided, and the resistor 16 is vertically arranged in a long shape in the axial direction of the main shaft 5. Reference numeral 32 is a support column, and reference numeral 33 is a protrusion amount adjusting handle, which plays the role of setting the protrusion amount so that the gap between the resistor 16 and the outer peripheral surface of the grinding type whitening roll 9 is within an appropriate range. is there. Reference numeral 34 denotes a spacer inserted between the grinding type whitening rolls 9 when a large number of grinding type whitening rolls 9 are placed.

  An annular collecting chamber 17 is formed below the removal chamber 13, and a plurality of scraping blades 19 are provided on the bottom surface of the collecting chamber 17 to slide the bottom surface of the collection chamber 17. The soot accumulated on the bottom surface of the collecting chamber 17 is transferred toward the soot discharge port 18. Then, suction / discharge is performed from the soot discharge port 18 through the exhaust pipe 20 toward the collecting fan 21.

  A motor base 22 is attached to the side of the main body base 8 at the lower part of the machine body. A motor 23 for driving the main shaft 5 is fixed to the motor base 22 and a motor pulley is attached to the motor shaft of the motor 23. A V-belt 26 is interlocked and connected between the drive pulley 25 attached to the main shaft 5 and the drive shaft 25 so that the power of the motor 22 can be transmitted to the main shaft 5.

  The grain supply unit 27 including the raw material supply port 2 includes a grain supply cylinder 28 that receives the grains, and a cone-shaped guide body that radially distributes the grains received from the grain supply cylinder 28 in the circumferential direction. 29, a cover body 30, and a transport spiral 31 for feeding the grain from the guide body 29 to the scouring chamber 14.

  Next, the planar shape of the grinding type whitening roll will be described with reference to FIG.

  The grinding type whitening roll 9 used in the grinding type vertical milling machine 1 of the present invention has a concentric cross section, and abrasive grains of a grinding stone are embedded in the entire outer circumference. However, the present invention is not limited thereto, and a superabrasive layer may be formed by electrodepositing superabrasive grains made of cBN abrasive grains or diamond abrasive grains on the surface of a metallic base metal. Thereby, there exists an effect | action which scrapes the surface of a rice grain by rubbing the surface of a rice grain with a file or a grindstone.

  The grinding part 9a of the grinding type whitening roll 9 is connected to the boss part 9c through the arm part 9b. The space portion 9d where the arm portion 9b does not exist serves as a flow path through which the air for removing the debris flows, and when the spacer 34 is inserted, the air can be circulated from the gap to the semen chamber 14. .

  And the grinding part 9a of the grinding type whitening roll 9 is characterized in that its outer peripheral surface is formed in a shape surrounded by alternately connecting the flat parts 9H and the arc parts 9E. Referring to FIG. 3, the ground portion 9a is formed by a plane figure surrounded by a straight line segment that becomes the flat portion 9H and a curved line segment that becomes the arc portion 9E.

  FIG. 4 shows another embodiment. This embodiment is characterized in that the grinding portion 9a is formed in a polygonal shape whose outer peripheral surface is surrounded only by the flat portion 9H. In this example, a regular dodecagon is adopted.

  Next, the operation of the grinding-type vertical milling machine 1 having the above configuration will be described.

  The raw brown rice introduced from the raw material supply port 2 of the grinding type vertical grain mill 1 is polished by the grinding type whitening roll 9 to cut the skin. At this time, if the operator operates the protrusion amount adjustment handle 33 of FIGS. 1 and 2 to adjust the gap between the resistor 16 and the outer peripheral surface of the grinding type whitening roll 9 to 5 to 6 mm, Removal is promoted.

  FIG. 5 is a schematic diagram showing how rice grains roll when the grinding type polishing roll 9 rotates. FIG. 5 (a) shows the state of rice grains when a roll (conventional technology) formed in a circular shape whose outer peripheral surface is surrounded by an arc is used, and FIG. 5 (b) shows an outer peripheral surface having a flat portion 9H and an arc. It is a mode of the rice grain when using the roll (Example) formed in the shape surrounded by connecting the part 9E alternately.

  Referring to FIG. 5 (a), when the conventional grinding-type whitening roll 9 is rotated in the rotational direction (arrow direction), the gap L between the milling chambers 14 remains narrow in the vicinity of the resistor 16, The flow will be restricted. At this time, the rice grain is flattened, that is, the side surface SO side shown in FIG. 6 comes into contact with the outer peripheral surface of the grinding-type whitening roll 9, and the side surface SO side is actively refined.

  On the other hand, referring to FIG. 5 (b), when the grinding-type whitening roll 9 of the embodiment is rotated in the rotation direction (arrow direction), in the vicinity of the resistor 16, the arc portion 9E shifts to the flat portion 9H. Occasionally, the gap L in the milling chamber 14 increases to the gap L + α, so that the restriction on the flow of rice grains is relaxed. The increase α of the gap at this time is generated by forming the flat portion 9H to be recessed by about 1 to 5 mm in the direction of the main shaft 5 from the outer peripheral surface of the grinding type whitening roll 9.

  And when it transfers to the circular arc part 9E from the flat part 9H, a clearance gap is narrowed and the flow of a rice grain comes to be controlled again. By this repeated action, the posture of the rice grains changes and rolls. That is, in addition to the side surface SO shown in FIG. 6, the back SE, the abdomen HA, the head TO, and the germ portion HI are also positively contacted with the outer peripheral surface of the grinding-type whitening roll 9 and are evenly refined. is there.

  Further, even if the grinding type whitening roll 9 shown in another embodiment of FIG. 4 is formed in a polygonal shape surrounded by the flat portion 9H, it is expected that the same equal fineness will be performed. The

  The grinding-type whitening roll 9 has a superabrasive layer on the surface of the base metal. In particular, if the superabrasive layer is a cBN abrasive layer, the abrasive layer from the whitening roll is ground. The grains are less likely to fall off and clogging is less likely to occur, and the life of the grinding type whitening roll 9 is prolonged.

  Further, the grinding-type vertical mill 1 is provided with a support column 15 for supporting the grinding-type dehulling wire cylinder 11, and the support column 15 protrudes toward the polishing chamber 14 and has a circle of the grinding-type whitening roll 9. Since the elongated resistor 16 that provides resistance to the movement of the grain by rotation in the circumferential direction is provided, the germination of brown rice collides with the resistor 16 a plurality of times, so that effective budding And punishment will be performed.

  As described above, according to the present embodiment, the grinding type whitening roll 9 is pivotally attached to the rotatable main shaft 5, and the grinding type removal metal mesh cylinder 11 is disposed around the grinding type whitening roll 9 through the gap. In the vertical grinding mill 1 that is erected and has a gap formed in the final milling chamber 14, the grinding type whitening roll 9 is a straight line segment on a part of the outer peripheral surface of the side of the concentric circle. Since the flat portion 9H is provided, the volume of the polishing chamber 14 in the arc portion 9E of the grinding-type whitening roll 9 and that in the flat portion 9H of the grinding-type whitening roll 9 are different. When the roll 9 is rotated, rolling of the rice grains easily occurs. That is, when the transition from the arc portion 9E to the flat portion 9H is performed, the clearance of the semen chamber 14 is widened and the restriction of the flow of rice grains is relaxed. On the other hand, when the transition from the flat portion 9H to the arc portion 9E is performed, Narrows and the flow of rice grains is regulated.

  Due to such repeated action, the posture of the rice grains changes and rolls. Therefore, in addition to the side surface of the rice grain, the back, abdomen, head, and germ are also positively brought into contact with the outer peripheral surface of the grinding-type whitening roll and uniformly crushed.

  The present invention can be applied to a friction type grain refiner in addition to a grinding grain refiner. In addition to the saddle type, a horizontal type may be used.

DESCRIPTION OF SYMBOLS 1 Grinding type vertical mill 2 Raw material supply port 3 Grinding type grain processing part 4 Fine product outlet 5 Main shaft 6 Upper bearing part 7 Lower bearing part 8 Main body base 9 Grinding type whitening roll 10 Whitening roll body 11 Grinding type removal Wire mesh tube 12 Removal cover 13 Removal chamber 14 Washing chamber 15 Strut 16 Resistor 17 Collection chamber 18 Collection outlet 19 Scavenging blade 20 Ventilation pipe 21 Collection fan 22 Motor base 23 Motor 24 Motor pulley 25 Drive pulley 26 V Belt 27 Grain supply unit 28 Grain supply cylinder 29 Guide body 30 Cover body 31 Conveying spiral 32 Strut cover 33 Projection amount adjustment handle 34 Spacer 35 Discharge chute 36 Weight

Claims (6)

A vertical grinding machine in which a grinding-type whitening roll is attached to a rotatable main shaft, and a grinding-type demolition wire mesh cylinder is erected around the grinding-type whitening roll through a gap, and the gap is formed in a grinding room. In the type grain mill,
The grinding-type milling roll is a vertical grinding-type grain refiner characterized in that a flat portion that is a straight line segment is provided on a part of the outer peripheral surface of a concentric cross section.   2. The vertical grinding according to claim 1, wherein the grinding type whitening roll has a shape in which a flat portion whose outer peripheral surface is a straight line segment and an arc portion whose outer peripheral surface is a curved line segment are alternately connected and surrounded. Type grain milling machine.   2. The vertical grinding mill according to claim 1, wherein the grinding milling roll has a polygonal shape surrounded only by a flat portion whose outer peripheral surface is a straight line segment.   The vertical grinding mill according to any one of claims 1 to 3, wherein the grinding milling roll has a superabrasive grain layer on a base metal surface.   The vertical grinding mill according to claim 4, wherein the superabrasive layer is a cBN abrasive layer.   A support for supporting the grinding type wire mesh cylinder is erected, and the support protrudes toward the polishing room and imparts resistance to the movement of the grain by rotating the grinding type whitening roll in the circumferential direction. The vertical grinding mill according to any one of claims 1 to 5, wherein a long resistor is provided.

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