JP2007268482A - Rice grinding polisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice grinding polisher which can excellently perform both of rice polishing and rice bran removal. <P>SOLUTION: The rice grinding polisher 10 comprises a rice polishing roll whose rotating shaft is directed in the vertical direction, a rice bran removal cylinder 14 installed on the outer periphery side of the rice polishing roll to form a rice polishing chamber between it and the rice polishing roll, a rice bran removal chamber 24 formed on the outer periphery side of the rice bran removal cylinder 14, and a suction duct part 32 communicated with the lower part of the rice bran removal chamber 24 for discharging rice bran powder. Rotation of the rice polishing roll polishes rice grains while raising them in the rice polishing chamber. An inclined plate 39 inclined to the vertical direction for guiding the bran powder to the suction duct part 32 is disposed on the outer periphery side of the rice bran removal cylinder 14. Thereby the rice bran powder discharged from the rice polishing chamber to the rice bran removal chamber 24 can be guided to the suction duct part 32 even when the amount of air from the suction duct part 32 is decreased. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grinding rice mill that rotates a rice mill roll to process rice grains.

  Generally, in a rice mill, a grinding rice mill for rough finishing is installed in the first process, and a friction rice mill for finishing is installed in the next process.

  In a grinding rice mill, if the milling pressure is applied strongly, the surface of the brown rice is deeply damaged and the quality deteriorates, and the milling roll (grinding stone) may break and break down. For this reason, the grinding rice mill is used for the purpose of promoting the rice milling action (the peeling action of the cocoon layer) of the friction milling machine in the next process by polishing the rice with a weak pressure and slightly scratching the surface of the brown rice.

  Further, the friction rice mill is configured to exert a rice milling pressure on the surface of the brown rice and a polishing action on the surface of the white rice by applying a high rice milling pressure.

  By the way, the grinding rice polishing machine is configured to include a dehulling cylinder that is arranged apart from the outer peripheral side of the rice milling roll that rotates about the axis. In such a grinding rice milling machine, it is often preferable to be a so-called vertical grinding rice milling machine in which the rotation axis of the rice milling roll and the stripping cylinder is the vertical direction (vertical direction) from the viewpoint of installation space and the like. (For example, refer to Patent Document 1).

  In such a grinding rice mill, a resistance valve is provided at the rice grain outlet after the milling, and the rice mill pressure (milling pressure) is adjusted by this resistance valve. In addition, as described above, the grinding rice milling machine has low rice milling pressure. Therefore, when the amount of suction air for removal that is applied to the removal chamber is increased (that is, when the wind force is increased), the rice grains in the removal tube are attracted to and adhered to the inner peripheral surface of the removal tube. For this reason, adjustment of the rice milling pressure by the resistance valve becomes impossible to adjust, resulting in mottled rice. In addition, if the suction air flow for removal is strong, soot easily adheres to the bent part of the removal duct part (duct part for sucking and discharging the dust by air suction) communicating with the removal room. Become. Then, the attached cocoon gradually grows and becomes large and eventually closes the dehulling duct portion, resulting in the impossibility of rice milling.

On the contrary, if the amount of suction air for removal is small (that is, if the suction wind is weakened), the flour discharged from the rice milling chamber to the removal chamber is not sucked and accumulates in the removal chamber. In particular, even if the removal chamber on the side with the suction port is removed by suction, the removal chamber on the opposite side may not be removed. For this reason, the efficiency of the rice milling action (peeling action of the cocoon layer) in the rice milling chamber is lowered, and eventually rice milling becomes impossible.
Japanese Patent No. 3101042

  In view of the above facts, an object of the present invention is to provide a grinding rice mill capable of performing both rice milling and scouring well.

  The invention according to claim 1 is a rice milling roll having a cylindrical shape whose rotation axis is directed in the vertical direction, and a rice milling machine that is provided on the outer peripheral side of the rice milling roll and forms a rice milling chamber between the rice milling roll. A grain, a dehumidification chamber formed on the outer peripheral side of the demineralization cylinder, and a suction duct portion for discharging the starch powder communicating with the lower part of the demineralization chamber, and the rice grains are rotated by rotating the rice mill roll Is a grinding rice milling machine that is milled while being raised or lowered in the rice milling chamber, and the outer periphery of the dehuller tube is inclined with respect to the horizontal direction and guides the flour to the suction duct part. A guide plate is disposed.

  In the first aspect of the present invention, the surface of the rice grain is ground in the process of milling the rice grain by the rotation of the milling roll, so that the rice cake powder is generated, and the rice cake powder passes through the removal hole of the removal cylinder and is removed. Enter the room. And the soot which entered the removal chamber falls on the guide plate, and is guided by the guide plate to reach the suction duct portion.

  Thus, even if the suction air volume from the suction duct portion is reduced, the soot discharged from the milling chamber to the removal chamber can be guided to the suction duct portion and discharged from the suction duct portion. It is possible to avoid the accumulation of soot flour. Therefore, it is possible to avoid the generation of spot milled rice due to the inability to adjust the milled rice pressure, or the growth and adhesion of rice bran to the suction duct part or its downstream side, and smoothing both the rice milling and the dehulling. It is possible to realize a grinding milling machine that can be used.

  The invention according to claim 2 is characterized in that at least one partition plate is provided, which divides the removal chamber along the vertical direction and whose lower end is separated from the upper surface of the guide plate by a predetermined distance. And

  As a result, it is avoided that the wind removal wind acts on the entire removal chamber to reduce the wind speed, and the suction force of the entire removal chamber is made uniform. Therefore, even if the suction air volume from the suction duct portion is reduced, the soot can be efficiently moved to the suction duct portion and discharged.

  According to a third aspect of the present invention, an intake port communicating with the upper surface side zone of the upper end portion of the guide plate and the outside of the apparatus is provided on the side wall of the removal chamber, and by sucking air from the suction duct portion, Air is caused to flow into the upper surface side zone from the intake port, and an air flow that flows to the suction duct portion along the guide plate is generated on the guide plate.

  Thereby, since the air inflow speed in the upper end part of a guide plate can be raised significantly, soot can be moved to a suction duct part still more efficiently and can be discharged | emitted. In addition, since air flows from the inside of the removal cylinder to the outside of the removal cylinder when air flows from the intake port, the rice grains in the removal cylinder are attracted to the inner peripheral surface of the removal cylinder. It is easy to avoid.

  ADVANTAGE OF THE INVENTION According to this invention, the grinding rice milling machine which can perform both rice milling and wrought well can be implement | achieved.

  Hereinafter, embodiments will be described and embodiments of the present invention will be described. As shown in FIGS. 1 and 2, a grinding rice mill (rising grinding rice mill) 10 according to an embodiment of the present invention is a rice mill roll (grinding grindstone) having a cylindrical shape and a rotation axis directed in the vertical direction. 12, a dehulling cylinder 14 provided on the outer peripheral side of the rice milling roll 12, a case 16 provided on the outer peripheral side of the dehulling cylinder 14, and a base 18 on the lower side of the case 16.

  The rotational axis of the rice mill roll 12 is disposed at a substantially central position of the case 16. Further, in the base portion 18, a drive portion (not shown) that provides a rotational force to the rice mill roll 12, a screw 48 described later, and the like is provided.

  A rice milling chamber 22 is formed between the rice milling roll 12 and the dehulling cylinder 14, and the rice mill is raised while the rice grains are rising in the rice milling chamber 22 by rotating the rice milling roll 12. . On the other hand, a removal chamber 24 is formed between the removal tube 14 and the case 16 to accommodate the bags that have passed through the removal tube 14 from the inside to the outside.

  In addition, the grinding rice mill 10 discharges the rice grains feeding unit 28 that feeds the rice grains (brown rice) to the lower part of the rice milling chamber 22 and the rice grains after the milling process (white rice) fed from the upper end of the rice milling chamber 22 to the outside. And a rice grain discharger 30 for recovery.

  Further, the grinding / milling machine 10 is provided with a suction duct portion 32 for discharging the flour that has entered the removal chamber 24 at the bottom of the case 16. The suction duct portion 32 communicates with the removal chamber 24 through a suction port 33 on the proximal end side, and is attachable to and detachable from the extension duct 34 on the distal end side. The inside of the extension duct 34 can be sucked by air by a suction mechanism (not shown).

(Exfoliating cylinder)
On the inner peripheral surface side of the removal cylinder 14 is provided a multi-helix 36 composed of diagonal protrusions arranged in parallel and in a spiral along an oblique direction intersecting the circumferential direction (FIG. 1). (See FIG. 4). The spiral direction of the multi-helix 36 is set to gradually rise along the rotation direction R of the milled rice roll 12. The angle formed by the multiple helix 36 with respect to the circumferential direction of the removal cylinder 14 is set according to the inner diameter, the rotational speed, and the like of the removal cylinder 14.

  In the multi-helix 36, a notch 38 (that is, a defect that does not partially form the multi-helix) is formed as a discontinuous part at a predetermined location. In the present embodiment, the notch 38 is disposed in the vertical direction along the rotation axis at a position that divides the scissor cylinder 14 into approximately four equal parts along the rotation axis direction. The length component L of the notch 38 along the circumferential direction of the milled rice roll 12 is appropriately set in consideration of the inner diameter, the rotational speed, and the like of the removal cylinder 14. The multi-helix 36 is configured by the four oblique protrusions arranged in the vertical direction so that adjacent intervals in the vertical direction (vertical direction) are equal. In order to provide the multi-strand spiral 36, for example, an oblique protrusion having a predetermined shape is formed in advance, and the oblique protrusion is fixed to the inner peripheral surface side of the removal cylinder 14 by welding.

  An inclined plate 39 that guides the soot to the suction duct portion 32 is disposed on the outer peripheral surface side of the removal cylinder 14. The lower end portion of the inclined plate 39 is connected to the suction port 33, and the upper surface of the lower end portion of the inclined plate 39 is flush with the suction port lower edge 33 </ b> L of the suction duct portion 32. The inclined plate 39 includes inclined plate portions 39A and 39B that extend upwardly from the suction port lower edge 33L along the outer peripheral surface of the scissor tube 14 while being inclined with respect to the vertical direction. Further, the circumferential position of the upper end portion 39U of the inclined plate 39 (the position around the outer peripheral surface of the removal cylinder 14) is a position 180 ° opposite to the suction duct portion 32, and at this position, the inclined plate portion 39A. , 39B are continuous with each other.

  In the present embodiment, the outer peripheral side edge of the inclined plate 39 is connected to the inner wall of the case 16, and the space is separated above and below the inclined plate 39. Further, an upper collar portion 14U is formed at the upper end of the removal cylinder 14, and a lower collar portion 14L is formed at the lower end of the removal cylinder 14. With this configuration, the above-described debris chamber 24 is formed by the upper collar portion 14U, the inclined plate 39, the dehulling cylinder 14, and the case 16, and the soot that has entered the dehulling chamber 24 is placed on the lower surface side of the inclined plate 39. It is prevented from moving.

  In addition, the fine removal cylinder 14 is provided with a large number of fine removal holes 40 through which the flour generated by the milled rice passes, only at positions above the inclined plate 39 over the entire circumference.

  In addition, at the upper end portion 39U of the inclined plate 39, an intake port (secondary air inlet) 41 communicating with the zone Z on the upper surface side of the inclined plate 39 and the outside of the apparatus forms the outer peripheral side of the removal chamber 24. A case 16 is formed. The lower edge of the air inlet 41 is formed on the upper surface of the inclined plate 39. With this configuration, air is sucked from the suction duct portion 32, so that air flows in from the air inlet 41 in the direction along the upper surface of the inclined plate 39, and the air flow that flows downward on the inclined plate 39 along the inclined plate 39. F (hereinafter, referred to as a wind removal wind) is generated.

  In addition, on the outer peripheral side of the removal cylinder 14 above the inclined plate 39, four partition plates 43A to 43D that partition the removal chamber 24 in the vertical direction are provided along the vertical direction. The lower ends of the partition plates 43A to 43D and the upper surface of the inclined plate 39 are separated by a predetermined distance. The predetermined interval is set in consideration of the intended wind speed of the removal wind F, the dimensions of the inclined plate, the inclination angle of the inclined plate 39, and the like.

  In addition, an inlet 42 for supplying rice grains from the rice grain feeding unit 28 to the lower part of the rice milling chamber 22 is formed at the lower part of the dehulling cylinder 14.

(Rice supply department)
The rice grain feeding unit 28 includes a forced feeding cylinder 46 that feeds the rice grains to the inlet 42 of the stripping cylinder 14, and a screw 48 that is provided in the forced feeding cylinder 46 and forcibly feeds the rice grains downward. It is equipped with. A supply rod 50 for supplying rice grains to the forced feeding cylinder 46 can be detachably attached to the upper end of the forced feeding cylinder 46.

(Rice discharge part)
A rice grain discharge port 54 for discharging rice grains (white rice) fed upward from the rice milling chamber 22 is formed at the upper part of the case 16. The grinding rice mill 10 is provided with a rice grain discharging unit 30 that guides the rice grains discharged from the rice grain outlet 54 to a predetermined position.

  The rice grain discharge unit 30 includes a resistance plate 56 that is biased in a direction to close the rice grain discharge port 54, and a discharge basket 58 that is connected to the rice grain discharge port 54 and directed obliquely downward. Here, the lower end height of the rice grain discharge port 54 is the same as the height of the upper edge of the upper collar portion 14U so that the rice grains fed upward from the rice milling chamber 22 are sequentially pushed out from the upper collar portion 14U to the discharge rod 58. Has been. The resistance plate 56 may be attached to the discharge rod 58 or may be attached to the case 16.

(Function)
Hereinafter, the operation and effect of the present embodiment will be described.

  In this embodiment, when performing the rice milling process, the inside of the extension duct 34 is sucked into the air, and the inside of the removal chamber 24 is sucked into the air from the suction duct portion 32. As a result, air flows from the intake port 41 along the upper surface of the inclined plate 39 into the zone Z, and a wind removal F that flows downward along the inclined plate 39 on the inclined plate 39 is generated.

  Further, four partition plates 43A to 43D are provided in the removal chamber 24, and the lower ends of the partition plates 43A to 43D and the upper surface of the inclined plate 39 are separated from each other by a predetermined distance. Therefore, it is avoided that the wind removal F acts on the entire removal chamber and the wind speed falls, and the wind removal F having an appropriate wind speed and air volume is generated.

  In addition, rice grains (brown rice) B to be degreased are fed into the supply basket 50 and sent to the forced feeding cylinder 46, and the screw 48 is rotated to rotate the rice grains B from the forced feeding cylinder 46 to the inlet 42 of the rice milling chamber 22. Supply. Then, by rotating the milled rice roll 12 by a driving unit provided in the base unit 18, in the milled rice chamber 22, the rice grains are subjected to the milling process while being spirally conveyed along the multi-helix 36. In this rice milling process, the surface of the rice grain is scraped off while the rice grain surface is lightly scratched. The scraped soot layer becomes soot powder, passes through the removal hole 40, enters the removal room 24, and falls onto the inclined plate 39. The soot falling on the inclined plate 39 is conveyed to the suction duct portion 32 along the inclined plate 39 by the above-described degassing wind F, and the outside of the apparatus is discharged.

  Moreover, in this embodiment, since the rice grain is mainly guided by the upper surface of the multi-helix 36 and rises, it is easy to appropriately set the load and residence time for the rice grain. And since the notch part 38 is formed in the multi-thread spiral 36, the rice grain which reached | attained the said notch part 38 provided in multiple in the predetermined location is the radial direction of the up-down direction or the stripping cylinder 14 in this notch part 38. Is mixed and stirred. That is, it is easy to suppress the occurrence of so-called unevenness, and the occurrence of uneven rice milling can be significantly suppressed as compared with the conventional case. And the rice grain (white rice) P by which generation | occurrence | production of the unevenness of polished rice was fully suppressed is discharged | emitted from the rice grain discharge part 30. FIG.

  As described above, in the present embodiment, the removal wind F that flows downward on the inclined plate 39 along the inclined plate 39 is generated, and the dust is conveyed to the suction duct portion 32 by the removal wind F. Yes. As a result, even if the suction air volume from the suction duct portion 32 is made weaker than before, the dust in the removal chamber 24 can be guided to the suction duct portion 32 and discharged from the suction duct portion 32. Therefore, the grinding and polishing machine 10 can perform both the rice milling and the dehulling well.

  Further, the partition plates 43A to 43D prevent the removal wind F from acting on the entire removal chamber and the wind speed from falling, so that the removal can be performed without increasing the air suction from the suction duct portion 32. The speed of the wind F can be increased, and the suction force of the entire removal chamber can be made uniform, so that the dust can be efficiently moved from the removal chamber 24 to the suction duct portion 32 and discharged. .

  Further, the intake port 41 is formed in the case 16, and air is sucked from the direction along the upper surface of the inclined plate 39. Therefore, the speed of the removal wind F can be increased further significantly, and the soot can be moved and discharged to the suction duct portion 32 with great efficiency.

  Further, the removal hole 40 is disposed over the entire circumference only at a position above the inclined plate 39. In addition, the outer peripheral side of the inclined plate 39 is connected to the inner peripheral side of the case 16, and the removal chamber 24 is formed only above the inclined plate 39. Accordingly, it is possible to prevent the soot from entering below the inclined plate 39, and it is not necessary to suck air below the inclined plate 39, so that the suction mechanism can be downsized.

  In the present embodiment, a multi-threaded spiral 36 having a notch 38 formed at a predetermined location is provided on the inner peripheral surface side of the removal cylinder 14. And by providing the grinding machine 14 with such a simple configuration in the grinding rice mill 10, it is possible to suppress the unevenness of the rice grains in the rice polishing process (polishing process), so that the occurrence of uneven rice polishing is greatly suppressed. Can do.

  In FIG. 2, the shape of the removal hole 40 is drawn as an elongated hole in the vertical direction, but it may be inclined at a predetermined angle with respect to the vertical direction of the removal cylinder 14. In addition, the shape of the hole is not limited to an elongated shape, but may be other shapes such as an ellipse.

  The embodiments of the present invention have been described with reference to the embodiments. However, the above embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiment.

It is side surface sectional drawing which shows the structure of the grinding rice mill which concerns on one Embodiment of this invention (The figure which showed the removal cylinder in the cross section). It is side surface sectional drawing which shows the structure of the grinding rice milling machine which concerns on one Embodiment of this invention (The figure which showed the removal cylinder in the non-cross section) FIG. 3 is a plan sectional view taken along the arrow 3-3 in FIG. 1. It is a perspective view which shows the dehulling cylinder of the grinding rice mill which concerns on one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Grinding machine 12 Rice milling roll 14 Removal cylinder 22 Rice milling chamber 24 Removal chamber 32 Suction duct part 39 Inclined plate (guide plate)
39U Upper end portion 41 Inlet ports 43A to D Partition plate F Air flow Z zone

Claims (3)

A milled rice roll that has a cylindrical shape and whose axis of rotation is oriented vertically;
A rice removal cylinder provided on the outer peripheral side of the rice mill roll and forming a rice mill chamber with the rice mill roll;
A removal chamber formed on the outer peripheral side of the removal tube;
A suction duct portion for discharging the soot powder communicating with the lower part of the dehumidifying chamber;
With
A grinding rice mill in which rice grains are milled while rising or descending in the milling chamber by rotating the milling roll,
A guide plate that is inclined with respect to the horizontal direction and guides the soot to the suction duct portion is disposed on the outer peripheral side of the removal cylinder.
Grinding machine characterized by that. The removal chamber is partitioned along the vertical direction, and at least one partition plate whose lower end is separated from the upper surface of the guide plate by a predetermined distance is provided.
The grinding rice mill according to claim 1. An intake port communicating with the upper surface side zone of the upper end portion of the guide plate and the outside of the apparatus is provided on the side wall of the removal chamber;
By sucking air from the suction duct portion, air flows into the upper surface side zone from the intake port, and an air flow that flows to the suction duct portion along the guide plate is generated on the guide plate.
The grinding rice mill according to claim 2.

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