JP2017213534A - Rice-polishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice-polishing machine capable of preventing sticking of rice bran to a screw roll surface for transferring a rice grain to a rice-polishing chamber, by recirculating the rice grain transferred to the rice-polishing chamber side to the raw material supply port side with a simple constitution of hardly clogging the rice grain, in the present invention.SOLUTION: The present invention comprises a grain feed part for forming a grain feed chamber for transferring a rice grain between a grain feed cylinder and a screw roll and a rice-polishing part for communicating with the grain feed chamber between a rice-polishing cylinder and a rice-polishing roll and forming a rice-polishing chamber for polishing the rice grain transferred from the grain feed chamber, and the grain feed chamber is formed with a reflux space having a larger clearance between the screw roll and itself than the other part in the circumferential direction in a grain feed cylinder inner surface in a part in the circumferential direction in the grain feed cylinder inner surface and extending the larger clearance in the axial direction, and the rice grain transferred to the rice-polishing chamber side by the screw roll, is recirculated to the raw material supply port side via the reflux space.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rice mill, and more specifically, to a rice mill capable of preventing sticking of rice cake on the surface of a screw roll that transfers rice grains to a milling chamber.

  2. Description of the Related Art Conventionally, a rice milling machine that can prevent sticking of rice cake on the surface of a screw roll that transfers rice grains to a milling chamber is known (see Patent Document 1).

FIG. 4 is an explanatory diagram of a conventional rice milling machine described in Patent Document 1.
In Patent Document 1, a rotating shaft 5 is penetrated into a debris wire mesh 10 made of a porous wall, and a milling roll 7 is attached to the rotating shaft 5, and raw rice is sent to the milling roll 7. In a rice milling machine in which a screw roll 25 is attached and a funnel base 27 having a supply port 26 is provided around the screw roll 25, a part of rice grains is formed on the outer surface of the peripheral wall in the gap between the funnel base 27 and the screw roll 25. Describes an apparatus for preventing sticking and wrinkling of a rice milling machine, in which a grooved ring 32 having a return groove 33 for returning the rice to the supply port side is inserted.

  In the rice milling machine described in Patent Document 1, the raw rice introduced from the supply port 26 is gradually put into a high-pressure state while being cerealed to the milling roll 7 side by the screw roll 25, and is slightly refined. At the same time, frictional heat is generated, so that the oil and fat in the rice grains melts and wets the surface of the screw roll 25, so that the flour is attached to the screw roll 25. When the raw rice is further cerealed and reaches the vicinity of the boundary with the whitening roll 7, the scouring pressure reaches the top.

  The rice grains in the gap between the whitening roll 7 and the stripping wire mesh 10 undergo a finening action while flowing in the rotation direction of the whitening roll 7 while rotating by the rotation of the whitening roll 7 under high pressure. Since a grooved ring 32 having a return groove 33 is inserted into the gap with the funnel stand 27, a part of the rice grains near the boundary between the screw roll 25 and the whitening roll 7 having the highest milling pressure is returned to the return. It flows into the groove and returns to the supply port 26 side.

The rice grains are rice grains that have been slightly refined by peeling off the surface of the cocoon layer by the screw roll 25, and thus do not contain any oil and fat components. When the cereals are sent, the flour adhering to the surface of the screw roll 25 is removed.
As described above, according to the rice milling machine described in Patent Document 1, rice grains that do not contain an oil and fat component are always mixed in the raw rice and then cerealed to prevent sticking of koji to the surface of the screw roll 25. can do.

However, the rice milling machine described in Patent Document 1 requires a grooved ring 32 separately, and the grooved ring 32 needs to be subjected to various processes such as a return groove 33, a hole 34a, and an opening 35. There are problems that are difficult and costly.
In the rice mill described in Patent Document 1, the grooved ring 32 is fitted between the funnel base 27 and the screw roll 25, and the grooved ring 32 is fixed to the inner surface of the funnel base 27 with a bolt 34. Since it is necessary, there is a problem that the assembly becomes complicated.
Furthermore, in the rice milling machine described in Patent Document 1, the return groove 33 formed in the grooved ring 32 forms a narrow closed space between the inner surface of the funnel stand 27 in a cross section perpendicular to the axial direction. Therefore, there is a problem that the rice grains returning to the supply port side are easily clogged.

JP-A 63-283762

  Therefore, the present invention can recirculate the rice grains transferred to the milling chamber side to the raw material supply port side with a simple configuration in which the rice grains are not easily clogged. An object of the present invention is to provide a rice milling machine capable of preventing the adhesion of the rice.

In order to achieve the above object, the present invention provides:
A cerealing chamber in which a raw material supply port is formed on one end side, a screw roll disposed in the cerealing cylinder, and a cerealing chamber for transferring rice grains between the cerealing cylinder and the screw roll is formed A cerealing department,
A milling cylinder comprising a porous wall; and a milling roll disposed within the milling cylinder and coaxially with the screw roll, wherein the milling chamber communicates with the cerealing chamber between the milling cylinder and the milling roll. A milling machine comprising a milling section in which a milling chamber for milling rice grains transferred from the grain chamber is formed,
In the cerealing chamber, a part of the circumferential direction on the inner surface of the cereal cylinder has a larger gap with the screw roll than the other circumferential portion on the inner surface of the cereal cylinder, and the large gap Forms a reflux space extending in the axial direction, and the rice grains transferred to the milling chamber side by the screw roll are refluxed to the raw material supply port side through the reflux space.

The present invention
It is preferable that the reflux space is formed by providing a concave groove on the inner surface of the cereal barrel.

The present invention
It is preferable that the concave groove is a key groove-shaped concave groove and is provided linearly in parallel with the rotation axis of the screw roll.

The present invention
It is preferable that the concave groove has a rectangular cross section perpendicular to the axial direction of the cereal cylinder.

The present invention
The rice mill is a horizontal axis type, and the raw material supply port is formed on the upper part of the one end side in the cereal cylinder,
The reflux space is preferably formed so as to communicate with the polishing chamber from the raw material supply port.

The present invention
A part of the rice grains which are transferred to the whitening portion side by the screw roll and located in the region where the internal pressure is highest near the boundary between the screw roll and the whitening roll are caused to flow into the reflux space by the action of the internal pressure. It is preferable to recirculate | reflux to the said raw material supply port side via.

  In the rice mill of the present invention, the cerealing chamber has a large gap between the screw roll and a part of the circumferential direction on the inner surface of the cereal cylinder as compared with the other circumferential portion on the inner surface of the cereal cylinder. Since the large gap forms a reflux space extending in the axial direction, the reflux space becomes a space opened in the cerealing chamber in a cross section perpendicular to the axial direction of the cereal cylinder, and rice grains are not easily clogged. With this configuration, the rice grains transferred to the milling chamber side by the screw roll can be refluxed from the milling chamber side to the raw material supply port side.

  Then, when the rice grains refluxed from the whitening chamber side to the raw material supply port side are transferred to the whitening portion side by the screw roll, the surface cocoon layer is peeled off and slightly refined (whitened) to obtain fats and oils. Since it does not contain any components, when it is mixed with the raw material rice and again transferred to the milling chamber side by the screw roll, the wrinkles adhering to the surface of the screw roll can be removed.

  Therefore, according to the rice milling machine of the present invention, it is possible to recirculate the rice grains transferred to the milling chamber side to the raw material supply port side with a simple configuration in which the rice grains are not easily clogged without requiring a separate member. It is possible to prevent the soot from adhering to the surface of the screw roll that transfers the rice grains to the milling chamber.

  Moreover, since the rice mill described in Patent Document 1 fits the grooved ring 32 between the funnel stand 27 and the screw roll 25, the space for cerealing the rice grains to the milling roll 7 side is narrowed, and the milling is performed. Although the amount of cerealing to the roll 7 side is reduced and the milling efficiency is reduced, according to the rice milling machine of the present invention, the space in the cerealing chamber is not narrowed and the milling efficiency (milling efficiency) does not decrease. Therefore, it is more advantageous than the rice milling machine described in Patent Document 1.

  In the rice mill of the present invention, if the reflux space is formed by providing a concave groove on the inner surface of the cereal cylinder, the reflux space can be easily formed.

  In addition, in the rice milling machine described in Patent Document 1, in order to prevent the reduction of the milling efficiency, it is necessary to secure a space in the grooved ring 32 for cerealing rice grains to the milling roll 7 side. However, in the rice milling machine of the present invention, if the reflux space is formed by providing a concave groove on the inner surface of the cereal cylinder, the apparatus does not increase in size. This is advantageous compared to the rice milling machine described in (1).

  In the rice mill of the present invention, if the concave groove is a key groove-shaped concave groove and is provided in a straight line parallel to the rotation axis of the screw roll, the concave groove can be easily formed. Can do.

  The rice mill of this invention can form the said ditch | groove easily if the cross-sectional shape at right angles to the axial direction of the said grain sending cylinder is a rectangular shape.

  The rice milling machine of the present invention is of a horizontal axis type, wherein the grain feeding tube is formed with the raw material supply port at the upper end on one end side, and the reflux space communicates from the raw material supply port to the milling chamber. If it is formed so that the rice grains located in the region where the internal pressure is highest near the boundary between the screw roll and the whitening roll flow into the reflux space from the end face side opened to the whitening chamber side. This is effective in refluxing the rice grains to the raw material supply port side.

  Further, the rice milling machine of the present invention is a horizontal axis type, and the reflux space is a key groove-like concave groove communicating with the milling chamber from the raw material supply port, and is parallel to the rotation axis of the screw roll. If it is formed by providing the concave groove provided in a straight line, the reflux space will be formed on the upper inner surface of the cereal cylinder, and formed on the inner surface other than the upper part of the cereal cylinder. Since the rice grains are less susceptible to gravity compared to the case where it is applied, it is effective in returning the rice grains to the raw material supply port side.

The principal part sectional drawing of the rice mill in Embodiment of this invention. The principal part enlarged view of FIG. AA sectional drawing of FIG. Explanatory drawing of the conventional rice mill.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a cross-sectional view of a main part of a rice mill in an embodiment of the present invention. FIG. 2 shows an enlarged view of the main part of FIG.
The rice milling machine 100 in the embodiment of the present invention is a horizontal axis type rice milling machine, and includes a cerealing unit 110 and a whitening unit 120.
The cerealing unit 110 includes a cylindrical cereal barrel 111 and a screw roll 112 disposed in the cereal barrel 111, and transfers rice grains between the cereal barrel 111 and the screw roll 112. A cerealing chamber 113 is formed.
The cereal barrel 111 is formed with a raw material supply port 114 at an upper end on one end side, and a raw material supply tube 115 is disposed on the raw material supply port 114, while opening at an end portion on the other end side. The screw roll 112 is mounted on a main shaft 116 that is rotationally driven by a drive motor (not shown).

The whitening portion 120 has a cylindrical or polygonal whitening cylinder 121 made of a porous wall such as a wire mesh, and a whitening roll 122 disposed in the whitening cylinder 121 and coaxially with the screw roll 112. Then, a whitening chamber 123 for whitening rice grains is formed between the whitening cylinder 121 and the whitening roll 122.
The milling chamber 123 communicates with the cerealing chamber 113 at one end on the one end side, and refines rice grains transferred from the cerealing chamber 113 in the milling chamber 123, while the other milled rice grains are polished on the other end side. A discharge port 124 is provided, and the discharge port 124 is closed by a resistance lid 125 capable of adjusting pressure.

A plurality of air blowing holes 126 are formed in the whitening roll 122, and air supplied from a blower fan (not shown) through a hollow portion (not shown) in the main shaft 115 blows out from the air blowing hole 126. .
A dust collection chamber 127 is provided around the whitening chamber 123, and the dust collection chamber 127 communicates with a dust collection duct 128 provided below.

In the rice mill 100 according to the embodiment of the present invention, the raw rice R supplied from the raw material supply cylinder 115 is supplied into the cerealing chamber 113 from the raw material supply port 114.
The raw rice R supplied to the cerealing chamber 113 is transferred to the milling chamber 123 side by the screw roll 112.

  The raw material rice R transferred to the whitening chamber 123 is stirred by the whitening roll 122, moves toward the discharge port 124 while being whitened by the friction between the grains of rice, pushes the resistance lid 125 open and is discharged. The

  In the whitening chamber 123, soot is generated by the whitening of the raw rice R, and the soot is collected from the hole of the whitening cylinder 121 by the air blown from the blowout hole 126 formed in the whitening roll 122. It is discharged to the dust collection duct 128 through the chamber 127.

2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
In an embodiment of the present invention, the upper inner surface of the cereal barrel 111 has a space for returning rice grains from the whitening chamber 123 side to the raw material supply port 114 side to the whitening chamber 123 from the raw material supply port 114. A concave groove 117 having a key groove shape communicating therewith is formed.

The concave groove 117 has a rectangular cross-sectional shape perpendicular to the axial direction of the cereal barrel 111, for example, a rectangular shape having a width of 28 mm and a height of 6.5 mm. It is formed in a straight line parallel to the rotation axis 112.
The whitening chamber 123 has an inner diameter larger than that of the cerealing chamber 113, and the end surface of the groove 117 opens into the whitening chamber 123.

  In the embodiment of the present invention, the raw rice R supplied to the cerealing chamber 113 is transferred to the milling chamber 123 side by the screw roll 112, but in the cerealing chamber 113, the raw rice R As the toner is transferred to the whitening chamber 123 side, the internal pressure gradually increases, and the internal pressure becomes the highest near the boundary with the whitening roll 122.

  The raw material rice R transferred to the whitening chamber 123 moves toward the discharge port 124 while being whitened by the action of the whitening roll 122, but in the vicinity of the boundary between the screw roll 112 and the whitening roll 122. A part of the rice grains located in the region where the pressure is highest flows into the concave groove 117 from the end surface side opened in the whitening chamber 123 and returns to the raw material supply port 114 side through the concave groove 117. Will be.

Here, when the rice grains returning to the raw material supply port 114 side in the concave groove 117 are transferred to the whitening chamber 123 side by the screw roll 112, the surface straw layer is peeled off slightly. It has been refined (whitened) and does not contain oil and fat components.
Therefore, the rice grains recirculated from the whitening chamber 123 side to the raw material supply port 114 side are newly mixed into the raw material rice R supplied from the raw material supply cylinder 115 and again to the whitening chamber 123 side by the screw roll 112. When transferred, wrinkles adhering to the surface of the screw roll 112 can be removed.

  In the embodiment of the present invention, the groove 117 formed on the upper inner surface of the cereal barrel 111 is a key groove-like groove, and is formed linearly in parallel with the rotation axis of the screw roll 112. Since the cross-sectional shape perpendicular to the axial direction of the cereal barrel 111 is rectangular, it can be easily formed at low cost.

  In addition, the concave groove 117 is a space opened in the cerealing chamber 113 in a cross section perpendicular to the axial direction of the cerealing cylinder 111, and is configured to prevent clogging of rice grains.

  Therefore, according to the embodiment of the present invention, the rice grains transported to the whitening chamber 123 side can be refluxed to the raw material supply port 114 side by a simple configuration in which the rice grains are not easily clogged without requiring a separate member. Therefore, adhesion of rice cake to the surface of the screw roll 123 for transferring rice grains to the whitening chamber 123 can be prevented.

  In addition, according to the embodiment of the present invention, since the key groove-shaped concave groove 117 is formed on the upper inner surface of the cereal barrel 111, the concave groove 117 is formed on the inner surface other than the upper portion of the cereal barrel 111. Compared with the case where it is formed, the rice grains are less affected by gravity, which is effective in returning the rice grains transferred to the whitening chamber 123 side to the raw material supply port 114 side.

  Here, the concave groove 117 preferably communicates with the whitening chamber 123 from the raw material supply port 114, but the rice grains transferred to the whitening chamber 123 side by the screw roll 112 to the raw material supply port 114 side. As long as it can be refluxed, the raw material supply port 114 does not necessarily need to communicate with the whitening chamber 123.

  Moreover, although it is preferable to form the said ditch | groove 117 in the upper inner surface of the said cereal barrel 111, the rice grain conveyed to the said whitening chamber 123 side by the said screw roll 112 is recirculated | refluxed to the said raw material supply port 114 side. If it can do, it can also form in the other part of the circumferential direction in the inner surface of the said cereal tube 111, such as the side part inner surface of the said cereal tube 111, for example. A plurality of the concave grooves 117 may be formed on the inner surface of the cereal barrel 111.

  The concave groove 117 is preferably formed in a straight line parallel to the rotation axis of the screw roll 112. For example, the concave groove 117 is inclined toward the axial direction and given a slight angle. Any other structure may be used as long as the rice grains can be refluxed to the raw material supply port 114 side.

  The concave groove 117 replaces the cross-sectional shape perpendicular to the axial direction of the cereal barrel 111 with a rectangular shape, for example, a semicircular shape, and the rice grains transferred to the milling chamber 123 side are used as the raw material. Any other cross-sectional shape can be used as long as it can be refluxed to the supply port 114 side.

  In the embodiment of the present invention, the rice grains transferred by the screw roll 112 are returned from the whitening chamber 123 side to the raw material supply port 114 side by the concave groove 117 formed on the upper inner surface of the cereal barrel 111. Although the space to be formed is formed, the rice grain is placed in the upper part of the cerealing chamber 113 by arranging the screw roll 112 so as to be eccentric downward with respect to the central axis of the cerealing cylinder 111. A space for reflux from the whitening chamber 123 side to the raw material supply port 114 side can be easily formed.

  In addition to arranging the screw roll 112 to be decentered downward with respect to the central axis of the cereal barrel 111, for example, a cross-sectional shape perpendicular to the axial direction of the cereal barrel 111 is a semicircular lower portion. And a part of the circumferential direction on the inner surface of the cereal cylinder 111 is between the screw roll 112 and the other part in the circumferential direction on the inner surface of the cereal cylinder 111. By having a large gap and a structure in which the large gap extends in the axial direction, a space for returning the rice grains to the raw material supply port 114 side can be formed in the upper part of the cerealing chamber 113.

In the rice milling machine according to the embodiment of the present invention, the whitening roll 122 has been described as an example of a friction type roll, but may be a grinding type roll.
In the embodiment of the present invention, the rice milling machine 100 has been described by taking a horizontal axis type rice milling machine as an example, but may be a vertical axis type rice milling machine.

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

  The rice milling machine of the present invention can recirculate the rice grains transferred to the milling chamber side to the raw material supply port side with a simple configuration in which the rice grains are not easily clogged. Since adhesion of soot can be prevented, it is highly practical and useful.

DESCRIPTION OF SYMBOLS 100 Rice mill 110 Grain feeding part 111 Grain sending cylinder 112 Screw roll 113 Grain feeding room 114 Raw material supply port 115 Raw material supply pipe 116 Spindle 117 Groove 120 Polishing part 121 Polishing cylinder 122 Polishing roll 123 Polishing room 124 Drain outlet 125 Resistance cover 126 Fan hole 127 Dust collection chamber 128 Dust collection duct R Raw rice

Claims (5)

A cerealing chamber in which a raw material supply port is formed on one end side, a screw roll disposed in the cerealing cylinder, and a cerealing chamber for transferring rice grains between the cerealing cylinder and the screw roll is formed A cerealing department,
A milling cylinder comprising a porous wall; and a milling roll disposed within the milling cylinder and coaxially with the screw roll, wherein the milling chamber communicates with the cerealing chamber between the milling cylinder and the milling roll. A milling machine comprising a milling section in which a milling chamber for milling rice grains transferred from the grain chamber is formed,
In the cerealing chamber, a part of the circumferential direction on the inner surface of the cereal cylinder has a larger gap with the screw roll than the other circumferential portion on the inner surface of the cereal cylinder, and the large gap Forms a reflux space extending in the axial direction, and the rice grains transferred to the milling chamber side by the screw roll are refluxed to the raw material supply port side through the reflux space.   2. The rice milling machine according to claim 1, wherein the reflux space is formed by providing a groove on an inner surface of the cereal cylinder.   3. The rice milling machine according to claim 2, wherein the concave groove is a key groove-shaped concave groove and is provided in a straight line parallel to the rotation axis of the screw roll.   The rice mill according to claim 2 or 3, wherein the groove has a rectangular cross-sectional shape perpendicular to the axial direction of the cereal cylinder. The rice mill is a horizontal shaft type, and the raw material supply port is formed in the upper part of the one end side of the cereal cylinder,
The rice refining machine according to any one of claims 1 to 4, wherein the reflux space is formed so as to communicate with the milling chamber from the raw material supply port.

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