JPH0691179A - Rice polishing machine - Google Patents

Abstract

PURPOSE:To provide the rice polishing device which enables the sufficient removal of the rice bran, peeled sugar, etc., sticking to rice grains even if the rice grains are continuously treated. CONSTITUTION:This rice polishing device has a drum 1, spiral fines 2, a compressed air supply pipe 3, nozzles 4 for injection of compressed air and a devices 5, 6 for carrying the rice grains in and out. This drum 1 has a pair of left and right end plates 7, 8 having a supply port and discharge port for the rice grains and are disposed to face each other on the both ends, plural reinforcing stays 25, meshed plates fixed along the outer peripheries of these end plates 7, 8 and revolving shaft parts 10, 11 fixed to the centers of the end plates 7, 8. A pulley 16 for rotational driving of the drum 1 is fixed to the end of the rotating shaft part 11. The spiral fins 2 transfer the rice grains in the drum 1 to the discharge port side while agitating the rice grains. A hose 16 which is disposed at the approximate center of the drum 1 and supplies the compressed air to one end side is connected to the supply pipe 3 which is provided with the nozzles 4 for injecting the compressed air to the rice grains under transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice polishing apparatus, and more particularly to a dry rice polishing apparatus capable of continuously removing rice bran and the like by polishing rice grains without using water.

[0002]

2. Description of the Related Art As is well known, rice grains used for cooked rice are
It is sharpened with water and then cooked with an electric rice cooker. However, the work of polishing rice with such water is very cumbersome and inefficient, and improvement has been desired for commercial use such as cooking a large amount of cooked rice. Further, when rice grains are ground with water, rice bran is mixed into the drainage, causing water pollution. Therefore, improvement has been desired from the viewpoint of preventing environmental pollution. Therefore, for example, Japanese Patent Application Laid-Open No. 1-218642 proposes a dry type rice polishing apparatus that does not use water. The rice polishing device disclosed in this publication stirs the rice grains stored in a container with a stirring body provided with a brush, and the friction between the rice grains and between the rice grains and the brush causes rice bran or rice bran adhered to the rice grains to be stirred. A structure is adopted in which peeled sugar and the like are separated and the separated attached substances such as rice bran are discharged to the outside by an air flow.

However, since the rice polishing apparatus disclosed in the above-mentioned publication is provided with an opening / closing valve and the like and employs so-called batch processing, for example, when it is adopted for commercial use, the polishing is intermittently performed. I was dissatisfied with the efficiency of rice polishing because it became rice. For such a problem, for example, the actual Kaihei 3
JP-A-75838 proposes a dry type rice polishing apparatus capable of continuously polishing rice grains. The rice polishing apparatus disclosed in this publication has a polishing rice brush that is driven to rotate in the rice flow path, and is provided with a dust suction means on the downstream side of the rice polishing brush. There were technical problems described below.

[0004]

That is, in the grain polishing apparatus described in the above-mentioned publication, since dust collecting means is provided on the downstream side of the grain polishing brush, rice bran etc. which has once separated from the grain of rice by the grain polishing brush. However, there is a problem that it becomes difficult to remove the redeeded rice bran and the like by the dust suction means.

The present invention has been made in view of such conventional problems, and its object is to sufficiently treat rice bran and peeling sugar adhering to rice grains continuously. The purpose is to provide a rice polishing device that can be removed.

[0006]

In order to achieve the above object, the present invention has a rice grain supply port and a rice grain discharge port provided in an end portion, which is housed in a case, and is subjected to polishing. A large number of holes having a diameter smaller than the grain size of rice grains are provided, and a rotary cylindrical drum is driven, and the rice grains provided on the inner peripheral surface of the drum are fed into the drum. Side of the spiral fin that is transferred from the side to the discharge side while stirring, the compressed air supply pipe provided along the axial direction of the drum, and the spiral fin provided along the axial direction of the compressed air supply pipe. A plurality of nozzles for ejecting compressed air to the rice grains being transferred.

The rice polishing apparatus has first and second rice polishing apparatuses having substantially the same structure as the above-mentioned structure, and the discharge port of the first rice polishing apparatus and the supply port of the second rice polishing apparatus are continuous with each other. To the first
Also, the second rice polishing apparatus can be arranged in upper and lower two stages. Further, the rice polishing device may be provided with a sterilizing device for sterilizing rice grains being transferred by the spiral fin.
Further, the rice polishing device is provided with a conveyor device that conveys the rice grains that have been polished below the discharge port, and far infrared irradiation that irradiates far infrared rays to the rice grains that have been polished by the conveyor device. A device can be provided.

[0008]

According to the rice polishing apparatus having the above structure, a spiral fin for transferring rice grains from the supply port side to the discharge port side while stirring,
Since it has a plurality of nozzles for ejecting compressed air to the rice grains being transferred by the spiral fin, the rotation of the drum and the agitation of the spiral fin allow the rice grains and the drum, the spiral fin and the rice grains to be separated from each other. Friction occurs, and the rice bran and the like adhering to the rice grains are separated by this frictional force. The separated rice bran or the like is discharged to the case side through the hole of the drum by the compressed air ejected from the nozzle, and reattachment is prevented.

According to the rice polishing apparatus of the second aspect,
Since the first and second rice polishing devices are arranged so as to be continuous stepwise, rice bran and the like adhering to rice grains can be sufficiently removed. Further, according to the rice polishing apparatus of the third aspect, since the sterilization apparatus is provided, it is possible to treat the bacteria that adhere to the rice grains. Further, according to the configuration of claim 4, since far-infrared rays are radiated to the rice grains after polishing, it is possible to prevent the quality deterioration of the rice grains after polishing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show an embodiment of a rice polishing apparatus according to the present invention. The rice polishing apparatus shown in the figure has a drum 1, a spiral fin 2, a compressed air supply pipe 3, a nozzle 4 for injecting compressed air, and rice grain loading / unloading devices 5, 6. The drum 1 includes a pair of left and right end plates 7 and 8 arranged opposite to each other, and the end plates 7 and 8.
A plurality of reinforcing stays 25, both ends of which are fixedly provided between the end plates 8, a mesh plate 9 fixed along the outer circumference of the end plates 7, 8 so as to circulate the end plates 7, 8, and the center of the left and right end plates 7, 8. And has left and right rotating shaft portions 10 and 11 which are fixedly mounted on the same axis.

The drum 1 is housed in a case 12 that covers the outer periphery thereof, and a cover 13 fixed to the case 12 is arranged outside the left end plate 7, and the cover 13 has a grain of rice that has been ground. A cylindrical discharge guide 14 is attached to guide the discharge to the outside. The case 12 has an inclined surface formed below it, and the collecting portion 1 for rice bran or the like is provided at the lowest part of the inclined surface.
2a is provided, and an opening of a suction pipe 15 connected to a dust suction device (not shown) is provided in the collecting unit 12a.

The compressed air supply pipe 3 is composed of a hollow pipe, extends through the left rotary shaft portion 10 to the right rotary shaft portion 11, and has one end supported by the right rotary shaft portion 11 via a bearing. There is. The compressed air supply pipe 3 is connected to the drum 1
A hose 16 that is arranged substantially at the center and supplies compressed air to one end side is connected, and a jet nozzle 4 that is directed downward is provided along the axial direction thereof. In this embodiment, the injection nozzle 4 is not provided in a predetermined length portion on the right end side of the drum 1, and is a portion approximately ⅔ of the length where the supply pipe 3 is located in the drum 1. Are installed at equal intervals.

A pulley 17 is provided at the right end of the right rotating shaft portion 11.
Is fixedly mounted, and the timing belt 18 wound around the pulley 17 is run by a motor (not shown), so that the drum 1 moves in a predetermined direction around the rotary shafts 10 and 11 at, for example, 20 to 30 minutes per minute. It is rotationally driven at a rotational speed of 30 times. The rice grain carrying-in device 5 is a hopper 1 into which rice grains are loaded.
9 and the spiral blade 20 fixed to the outer periphery of the right rotation shaft portion 11
And a widening cylinder portion 21 that connects the hopper 19 and the right end plate 8 of the drum 1 for communication. Unloading device 6
In this embodiment, is composed of a belt conveyor, and a conveyor belt is provided below the discharge guide 14.

The left and right end plates 7 used in this embodiment,
8 is shown in detail in FIGS. The left end plate 7 is composed of a flat plate having a substantially octagonal outer peripheral shape, and the left rotary shaft portion 1 is provided at the center.
A through hole 7a, in which 0 is fixed in the inserted state, is formed, and a plurality of substantially U-shaped cutouts 7b, which serve as discharge ports for the polished rice grains, are provided outside the through hole 7a. With
Around the through hole 7a, a hole portion 7c for fixing the reinforcing stay 25 is formed.

Like the left end plate 7, the right end plate 8 is formed of a flat plate having an outer periphery of a substantially octagonal shape, and a through hole 8a is formed in the center of the right end shaft 8 for fixing the right rotating shaft portion 11 in the inserted state. A plurality of substantially trapezoidal through holes 8b serving as rice grain supply ports are provided outside the through hole 8a, and a hole portion 8c for fixing the reinforcing stay 25 is provided around the through hole 8a. ing.

The main part of the drum 1 is shown in FIG.
6 is an assembly of division units A obtained by dividing an octagon into four, and each division unit A has a pair of flange portions 22 arranged at both ends, and a connection unit provided on each flange portion 22 for connection. In each divided unit A, a plurality of ribs 24, which become the spiral fins 2 in the assembled state, are welded between the flange portions 22 at a predetermined interval, and are attached to the outer periphery of the ribs 24. Is welded to a part of the mesh plate 9 bent in a substantially concave shape.

When the four divided units A having the above-described structure are assembled in a tubular shape by bringing the flange portions 22 adjacent to each other in the circumferential direction into contact with each other and attaching the bolts and nuts to the respective mounting holes 23, as shown in FIGS. As shown in FIG. 1, the ribs 24 provided in each division unit A are continuous in the circumferential direction,
The spiral fin 2 is formed at a predetermined pitch and at a predetermined angle with respect to the axial direction.

When the split unit A is assembled, a substantially octagonal space is formed on the inner peripheral side of the spiral fin 2, and the reinforcing stay 25 is inserted through this space. Then, the left and right end plates 7 and 8 to which the left and right rotary shafts 10 and 11 are fixedly attached are attached to both ends of the cylindrical assembly as described above, and the reinforcing stay 25 is provided between the end plates 7 and 8. When fixed, the drum 1 shown in FIG. 1 is obtained.

Next, the operation of the rice polishing apparatus having the above structure will be described. In the operation of the rice polishing apparatus, rice grains are put into the hopper 18 while the pulley 16 is rotated and compressed air is supplied to the compressed air supply pipe 3. The rice grains that have been fed into the through hole 8 of the right end plate 8 are driven by the rotation of the spiral blade 19.
It is continuously fed into the drum 1 via b. The rice grains fed into the drum 1 are continuously transferred to the discharge port side of the left end plate 7 while being stirred by the rotation of the spiral fin 2. In the process of this transfer, by stirring and transferring, friction is generated between the rice grains and the mesh plate 9 of the drum 1, between the rice grains and the spiral fins 2 and between the rice grains. Rice bran etc. that are present will be released. The separated rice bran or the like is discharged to the case 12 side through the holes of the mesh plate 9 of the drum 1 by the compressed air ejected from the nozzle 4 and collected in the collecting unit 12a, and then the suction pipe 15
It is accommodated in the dust collector through the, and reattachment of rice bran and the like separated from the rice grains is prevented.

In this case, when compressed air is ejected from the nozzle 4 to the rice grains, the compressed air promotes cooling of the rice grains,
Since it is possible to prevent deterioration such as cracking of rice grains whose temperature rises due to friction, it is desirable that the temperature of the compressed air is lower than normal temperature. Then, the foreign matter such as rice bran is removed,
The grain of rice that has been milled is then continuously fed to the left end plate 7 of the drum 1.
It is dropped onto the belt of the carry-out device 6 through the notch portion 7b and the discharge guide 14 and is transferred to the outside by the carry-out device 6.

In the above embodiment, the carrying-in device 5 and the carrying-out device 6 are provided on the left and right sides of the drum 1, but they are not necessarily required to carry out the present invention. For example, the drum 1 Rice grains may be supplied to the supply port of the rice by a dropping method, or a container may be installed below the discharge port to receive the polished rice grains. 8 to 10 show another embodiment of the rice polishing apparatus according to the present invention, in which the same or corresponding parts as those in the above embodiment are designated by the same reference numerals,
The description is omitted, and only the characteristic part will be described below. The rice polishing apparatus shown in the figure has first and second rice polishing apparatuses B and C having substantially the same configuration as the rice polishing apparatus of the above embodiment. In these first and second rice polishing devices B and C, the first rice polishing device B is installed on the upper stage side, and the second rice polishing device C is installed on the lower stage side. The supply port side of the second polishing device C is located on the discharge side of the rice grain of B,
The second polishing device C is arranged on the opposite side of the first polishing device B.

In the first and second rice polishing apparatuses A and B of this embodiment, the first and second end plates 30 and 31 (corresponding to the left and right end plates 7 and 8 of the above embodiment) are disc-shaped. Inside the end plates 30 and 31, each of the end plates 30 and 31 has substantially the same structure as the above embodiment.
A square mesh plate 9 is fixed, and a hole to which the reinforcing stay 25 is attached is formed outside the mesh plate 9.

On the outer surface of the second end plate 31 of each of the first and second rice polishing devices B and C, there is fixedly provided a tubular body 29 having both ends opened so as to open outward. Circular container-shaped discharge members 32, 33 so as to be in sliding contact with the outer peripheral surface of the cylindrical body 29.
Are arranged, and the discharge members 32 and 33 are provided with cylindrical discharge chutes 34 and 35, respectively.

On the other hand, in the second rice polishing apparatus C, one end is opened in the drum 1 and the other end is the discharge chute 3 of the first rice polishing apparatus B.
4, a supply pipe 34 connected to communicate with 4 is installed, and below the discharge chute 35, a carry-out device 6 composed of a belt conveyor is installed. Then, the drive mechanism of the first and second rice polishing devices B and C arranged in a stepped manner is
In this embodiment, it is configured as follows.

Left and right rotating shafts 10, 11 of the first rice polishing apparatus B
Is the same as the above embodiment, but the right rotating shaft portion 37 of the second rice polishing apparatus C is composed of a simple rod, and the drive motor 39 is connected to the end portion of which the clutch mechanism 38 is interposed. ing. A driving pulley 40 is fixed to the right rotating shaft portion 37 at an intermediate position between the driving pulley 40 and the pulley 17 fixed to the right rotating shaft portion 11 of the first rice polishing apparatus B. It is connected via a belt 41.

The member designated by the reference numeral 42 in FIG. 8 is
A tension pulley for adjusting the tension of the belt 41. In the drive mechanism thus configured, when the drive motor 39 is rotated, the first and second rice polishing devices B and C are
Drum 1 rotates simultaneously. On the other hand, the first rice polishing apparatus B of the present embodiment is provided with the sterilizer 43. The sterilization device 43 is for injecting ozone into the rice grains when the rice grains are transferred by the spiral fin 2 of the drum 1, and a pipe 44 inserted into the compressed air supply pipe 3 and the pipe 44. A nozzle pipe 45 which is connected in communication and has a small hole provided adjacent to the position where the injection nozzle 4 is arranged. The end of the pipe 44 is connected to an ozone cylinder (not shown). There is.

In this embodiment, the compressed air jetting nozzles 4 of the first and second rice polishing devices B and C are arranged evenly over substantially the entire length of the drum 1. Further, above the carry-out device 6 installed below the discharge chute 35 of the second rice polishing device C, a far infrared ray that irradiates far-infrared rays to the rice grains after being rice-mounted on the belt and being transferred. An infrared irradiation device 46 is provided.

Further, inside the case 12, partition plates 47 and 48 are provided below the first and second rice polishing devices B and C, respectively, and these partition plates 47 and 48 are arranged in the same direction and at substantially the same angle. The partition plates 47 and 48 are installed in a slanted state in the collecting unit 1 for collecting deposits such as rice bran discharged from the mesh plate 9 of the drum 1 of each of the rice polishing devices B and C.
It is for guiding to 2a.

In the rice polishing apparatus thus constructed, the drive motor 39 is rotated, compressed air is supplied to the compressed air supply pipe 3, ozone is supplied to the pipe 44, and the far infrared ray device 46 is activated. In the state, the hopper 1 of the first rice polishing apparatus B
Rice grains are put into 9. The fed rice grains are continuously fed into the drum 1 through the through holes of the first end plate 30 by the rotational driving of the spiral blades 20.

The rice grains sent into the drum 1 are continuously transferred to the discharge port side of the second end plate 31 while being stirred by the rotation of the spiral fin 2. In the process of this transfer, the spiral fin 2 is agitated and transferred, so that friction is generated between the rice grain and the mesh plate 9 of the drum 1, between the rice grain and the spiral fin 2, and between the rice grains. Rice bran etc. adhering to the will come off. Nozzle 4 for rice bran etc.
The compressed air ejected from the mesh plate 9 of the drum 1
Is discharged to the case 12 side through the hole of the collecting section 12a.
Then, the rice bran, which has been separated from the rice grains, is prevented from being reattached by being collected in the dust collecting device through the suction pipe.

In the drum 1, the spiral fin 2
Ozone is jetted from the nozzle pipe 45 to the rice grains that are transferred while being agitated, and the ozone sterilizes various bacteria adhering to the rice grains. Then, the rice grains that have reached the tubular body 29 of the first rice polishing apparatus B are introduced into the drum 1 of the second rice polishing apparatus C via the discharging member 32, the discharging chute 34, and the supply pipe 36. The rice grains fed into the drum 1 are agitated by the rotation of the spiral fin 2, and the second end plate 3
1 is continuously transferred to the discharge port side, and in this process, the rice bran and the like adhering to the rice grains are removed by the same frictional force as above.

The rice grains further polished by the second polishing device C are dropped onto the belt of the discharging device 6 via the discharging member 33 and the discharging chute 35, and transferred to the outside by the discharging device 6. It In the transfer process by the carrier device 6, the far-infrared device 46 irradiates far-infrared rays onto the rice grains after polishing. In the rice polishing apparatus configured as described above, since the first and second rice polishing apparatuses B and C are arranged so as to be continuous stepwise, rice bran and the like adhering to rice grains can be sufficiently removed. It can be removed and the entire device becomes compact. Further, according to the rice polishing apparatus of this embodiment, since the sterilizing apparatus 43 for injecting ozone is provided, it is possible to treat various bacteria adhering to rice grains. Further, in the rice polishing apparatus of this embodiment, since far-infrared rays are radiated by the far-infrared ray irradiation apparatus 46 to the rice grains after rice polishing,
It is possible to prevent quality deterioration after polishing.

In the embodiment shown in FIG. 8, the sterilizing device 43 is provided only in the first polishing device B, but
The sterilization device 43 may be provided only on the side of the second polishing device C or on both the first and second polishing devices B and C. The sterilizing device 43 and the far-infrared irradiation device 46 shown in the embodiment of FIG. 8 can also be installed in the rice polishing device of the first embodiment.

[0034]

As described above in detail in the embodiments,
According to the rice polishing apparatus of the present invention, by stirring and transfer by a spiral fin, friction between rice grains is generated, and rice bran and peeled sugar separated from the rice grains are released to the outside by compressed air. Since redeposition is prevented, it is possible to polish rice efficiently and continuously. Moreover, since the rice grains are cooled by the compressed air, it is possible to prevent the rice grains from being denatured from being deteriorated.

Further, according to the second aspect of the present invention, the first and second rice polishing devices are arranged in a step shape so that the rice polishing treatment can be continuously performed, so that higher quality rice polishing can be performed. In addition, the entire device becomes compact. Furthermore, according to the structure of claim 3, rice grains can be sterilized. Further, according to the structure of claim 4, since far-infrared rays are radiated, it becomes possible to maintain the quality of rice grains at a high level for a relatively long time even after polishing.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a rice polishing apparatus according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an explanatory diagram of a left end plate of the drum shown in FIG.

4 is an explanatory view of a right end plate of the drum shown in FIG.

5 is a perspective view of a division unit used in the drum of the rice polishing apparatus shown in FIG. 1. FIG.

FIG. 6 is a plan view of the split unit.

FIG. 7 is a side view of the split unit in an assembled state.

FIG. 8 is an overall view showing another embodiment of the rice polishing apparatus according to the present invention.

9 is a right side view of FIG.

FIG. 10 is a left side view of FIG.

[Explanation of symbols]

 1 Drum 2 Spiral fin 3 Compressed air supply pipe 4 Injection nozzle

Claims (4)

[Claims] 1. A porous body which is housed in a case, has a supply port and a discharge port at an end thereof, is provided with a large number of holes having a diameter smaller than that of rice grains to be ground, and is driven to rotate. A cylindrical drum, a spiral fin provided on the inner peripheral surface of the drum for transferring the rice grains supplied into the drum from the supply port side to the discharge port while stirring, and along the axial direction of the drum And a plurality of nozzles that are provided along the axial direction of the compressed air supply pipe and that eject compressed air to the rice grains that are being transferred by the spiral fin. Rice polishing equipment. 2. The rice polishing device has first and second rice polishing devices having substantially the same structure as the above structure, and the discharge port of the first rice polishing device and the supply port of the second rice polishing device are continuous. The rice polishing apparatus according to claim 1, wherein the first and second rice polishing apparatuses are arranged in upper and lower two stages. 3. The rice polishing apparatus according to claim 1, wherein the rice polishing apparatus is provided with a sterilizing device for sterilizing rice grains being transferred by the spiral fin. 4. The rice polishing apparatus is provided with a conveyer device below the discharge port for conveying the polished rice grains, and the far infrared rays are radiated to the rice grains after being polished being conveyed by the conveyor device. A far-infrared irradiation device is provided, The rice polishing apparatus of Claim 1 or 2 characterized by the above-mentioned.