JPH06142531A - Rice polishing device - Google Patents

Abstract

PURPOSE:To make it sure that continuous rice polishing operation can be performed by stirring and transporting rice grains from a feed aperture to a discharge aperture using a spiral fin, then ejecting a compressed air from a nozzle halfway through the transport route to strip bran off the grain due to stirring and friction, and discharging the polished grain using the compressed air. CONSTITUTION:Rice grains are dumped into a hopper 19 in such a state that a spiral fin 2 is allowed to rotate and a compressed air is supplied to a compressed air feeding pipe 3. The grains are continuously fed into a first drum 1 through a through hole in a right end plate 8 using a spiral blade 20. Further, the grains, stirred by rotation of the spiral fin 2, are transported to a discharge aperture in a left end plate 7 continuously. In this transport step, friction occurs between the rice grain and the mesh plate 9 of the first drum 1, between the rice grain and the spiral fin 2, and between the rice grains, thus resulting in the separation of bran from the rice grain. The rice bran is expelled by the compressed air ejected from a nozzle 4.

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. However, in the grain polishing apparatus disclosed in this publication, a grain polishing brush that is driven to rotate is arranged in the flow path of rice, and dust collecting means is provided on the downstream side of the grain polishing brush. The device has the 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 comprises a main polishing machine and a sub-polishing machine installed in front of or behind this main polishing machine, A polishing device for continuously polishing rice with the main and sub-polishing machines, wherein the main polishing machine is housed in a case, has a supply port and a discharge port at an end, and is polished. A large number of holes having a diameter smaller than the grain size of rice grains are provided, the first drum is a perforated cylindrical drum that is rotationally driven, and the inner peripheral surface of the first drum is provided. A spiral fin for transferring the produced rice grains from the supply port side to the discharge port side while stirring, a compressed air supply pipe provided along the axial direction of the first drum, and an axial direction of the compressed air supply pipe. And a plurality of nozzles for ejecting compressed air to the rice grains being transferred by the spiral fins. The sub-polishing machine is a perforated tubular shape that is housed in a case, has a supply port and a discharge port at the end, and has a large number of holes with a diameter smaller than the grain size of the rice grains to be milled. Second drum, an air supply pipe provided along the axial direction of the second drum, and rice grains to be milled and provided along the axial direction of the air supply pipe from the supply port side to the discharge port. And a plurality of nozzles for ejecting a swirling flow that is transferred to the side.

[0007]

According to the rice polishing apparatus having the above-mentioned structure, the main rice polishing machine has a spiral fin for transferring rice grains from the supply port side to the discharge port side while stirring, and the rice grains being transferred by the spiral fin. Since it has a plurality of nozzles for ejecting compressed air, friction occurs between the rice grain and the drum, the spiral fin and the rice grains due to the rotation of the first drum and the stirring of the spiral fin. Rice bran etc. adhering to the rice grains will come off. The separated rice bran or the like is discharged to the case side through the hole of the first drum by the compressed air ejected from the nozzle, so that re-adhesion is prevented.

Further, since the sub-polishing machine has a plurality of nozzles for ejecting a swirling flow for transferring the rice grains to be polished from the supply port side to the discharge port side, this is provided in front of the main polishing machine. If you install it in the main polishing machine, you can preliminarily remove rice bran etc. adhering to the rice grains before polishing with the main polishing machine with a swirling flow, and if you install the secondary polishing machine after the main polishing machine, It is possible to supplementarily remove rice bran that was not completely removed by a rice machine.

[0009]

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 to 11 show an embodiment of a rice polishing apparatus according to the present invention. The polishing apparatus shown in the figure has a main polishing machine A and a secondary polishing machine B installed after the main polishing machine A, as shown in FIG. The rice grains are continuously milled by these main and sub-polishing machines A and B.

As shown in detail in FIG. 2, the main polishing machine A has a first drum 1, a spiral fin 2, and a compressed air supply pipe 3.
And a nozzle 4 for injecting compressed air, and rice grain loading / unloading devices 5, 6. The first drum 1 includes a pair of left and right end plates 7 and 8 arranged opposite to each other, and these end plates 7 and 8.
A plurality of reinforcing stays 9 having both ends fixed between them, an end plate 7,
Along with the outer periphery of 8, mesh plate 9 fixed so as to circulate around it, and fixedly installed at the centers of left and right end plates 7, 8,
It has left and right rotating shaft portions 10 and 11 which are coaxially located.

The first drum 1 is a case 1 that covers the outer periphery of the first drum 1.
2, a cover 13 fixed to the case 12 is disposed outside the left end plate 7, and the cover 13 has a cylindrical discharge guide 14 that guides the polished rice grains to the outside.
Is attached. The case 12 has an inclined surface formed below it, and a collecting section 12a such as rice bran is provided at the lowest portion of the inclined surface. The collecting section 12a includes a suction pipe 15 connected to a dust suction device (not shown). An opening is provided.

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. Further, the compressed air supply pipe 3 is arranged substantially at the center of the first drum 1 and is connected to a hose 16 for supplying compressed air to one end side thereof, and the jet nozzle 4 directed downwards along the axial direction thereof. Is provided. In this embodiment, the injection nozzle 4 is not provided in the predetermined length portion on the right end side of the first drum 1, and is approximately 2 with respect to the length where the supply pipe 3 is located in the first drum 1. They are installed at equal intervals in the / 3 part.

A pulley 17 is provided at the right end of the right rotating shaft portion 11.
When the timing belt 18 wound around the pulley 17 is run by a motor (not shown), the first drum 1 moves the first drum 1 in a predetermined direction around the rotary shafts 10 and 11, for example, every minute. It is rotationally driven at a rotational speed of 20 to 30 times. The rice grain carrying-in device 5 includes a hopper 19 into which rice grains are fed, and a spiral blade 2 fixed to the outer periphery of the right rotating shaft portion 11.
0, and an expanding cylinder portion 21 that connects the hopper 19 and the right end plate 8 of the first drum 1 for communication. The carry-out device 6 is composed of a belt conveyor in this embodiment,
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 9 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 9 is provided around the through hole 8a. ing.

In the present embodiment, the main part of the first drum 1 is a division unit U obtained by dividing an octagon into four as shown in FIGS.
Each of the division units U includes a pair of flange portions 22 arranged at both ends and each flange portion 22.
And a mounting hole 23 for connection provided in each of the split units U, and each of the division units U has a rib 2 that becomes the spiral fin 2 in the assembled state.
A plurality of No. 4 are welded between the flange portions 22 at a predetermined interval, and a part of the mesh plate 9 bent in a substantially concave shape is welded to the outer periphery of the rib 24.

When the four divided units U constructed in this manner are assembled into 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, FIG. 8 and FIG. 2, the ribs 24 provided on each division unit U 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 U is assembled, a substantially octagonal space is formed on the inner peripheral side of the spiral fin 2, and the reinforcing stay 9 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 9 is provided between the end plates 7 and 8. When fixed, the first drum 1 shown in FIG. 1 is obtained.

Next, the operation of the main polishing machine A having the above construction will be described. In the operation of the main polishing machine A, rice grains are fed into the hopper 18 while the pulley 16 is rotated and compressed air is supplied to the compressed air supply pipe 3. The introduced rice grains are continuously fed into the first drum 1 through the through hole 8b of the right end plate 8 by the rotational driving of the spiral blade 19.

The rice grains fed into the first 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, friction is generated between the rice grains and the mesh plate 9 of the first drum 1, between the rice grains and the spiral fins 2 and between the rice grains due to the stirring and the transfer, and the frictional force adheres to the rice grains. The rice bran etc. that are doing it leave. The separated rice bran or the like is discharged to the case 12 side through the holes of the mesh plate 9 of the first drum 1 by the compressed air ejected from the nozzle 4, and after being collected in the collecting unit 12a, it is passed through the suction pipe 15. It is housed in a dust collector to prevent re-adhesion of rice bran that has separated from the rice grains.

In this case, when compressed air is ejected from the nozzle 4 onto 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 polished rice grains are then continuously dropped onto the belt of the unloading device 6 via the cutout portion 7b of the left end plate 7 of the first drum 1 and the discharge guide 14, and transferred to the outside by the unloading device 6. It

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 first drum 1, but they are not always necessary for carrying out the present invention.
For example, rice grains may be supplied to the supply port of the first drum 1 by a dropping method, and a container may be installed below the discharge port to receive the polished rice grains. On the other hand, de-polishing machine B
Has a second drum 50, an air supply pipe 51, and an air injection nozzle 52, as shown in detail in FIGS. 9 to 11. In this embodiment, the second drum 50 is a metal formed by punching out a large number of elongated holes 53 having a width smaller than the grain of rice to be milled, for example, a stainless steel plate rolled into a cylindrical shape, and both ends thereof. By fixing the ring-shaped end plate 54 fixedly attached to the inner surface of the case 55, the central axis is set to be substantially horizontal.

Through holes having the same diameter as the second drum 50 are formed at both ends of the case 55 so as to correspond to the end portions of the second drum 50, and these through holes are covered. A rice grain supply hopper 56 and a discharge cylinder portion 57 are provided, and an upper end opening of the supply hopper 56 is located directly below the discharge device 6 of the main polishing machine A. Further, in the case 55, as in the case of the main polishing machine A, an inclined surface is formed on the lower side, and the collecting portion 5 such as rice bran is provided at the lowest portion of the inclined surface.
8 is provided, and the collecting portion 58 is provided with an opening of a suction pipe connected to a dust suction device (not shown).

The air supply pipe 51 includes a supply hopper 56 and a second hopper 56.
The drum 50 and the discharge cylinder 57 are passed through the second
The supply hopper 56 is provided substantially on the central axis of the drum 50.
The blower 59 is connected to the open end on the side, and the open end on the side of the discharge cylinder 57 is open to the outside air. A large number of nozzles 52 are provided along the axial direction of the air supply pipe 51.

In this embodiment, the nozzles 52 are arranged at the highest density in the portion of the supply hopper 56, and the arrangement density becomes coarser toward the discharge cylinder portion 57 side. Not provided. Further, the nozzle 52 is
As shown in detail in FIG. 11, the air ejection angle (angle θ with respect to the central axis of the air supply pipe 51, θ _{1 in} FIG. 11 is increased from the supply hopper 56 side to the discharge cylinder portion 57 side.
<Θ ₂ ) are set differently, and by setting such an ejection angle, when the air flow supplied from the blower 59 is ejected from the nozzle 52, the air is supplied to the outer periphery of the air supply pipe 51. A swirl flow is formed from the hopper 56 toward the discharge cylinder 57 side.

In the sub-polishing machine B constructed as described above,
When the rice grains that have been polished by the main polishing machine A are fed from the discharge device 6 into the supply hopper 56, the fed rice grains are discharged from the nozzle 52.
By the swirling flow of the air generated by the above, it is transferred to the discharge cylinder portion 57 side, and the rice grain after polishing is taken out from the discharge cylinder portion 57. During this transfer process, the rice grains collide with each other and the rice grains collide with the inner peripheral surface of the second drum 50. Due to the impact of these collisions and the jet of the swirling flow, the main rice washing machine A
Rice bran etc.

Then, the separated rice bran and the like pass through the slot 53 of the second drum 50 and are discharged into the case 55.
After being collected in the collecting unit 58, it is discharged to the outside. Now,
In the rice polishing apparatus configured as described above, first, the main rice polishing machine A removes adherents such as rice bran adhering to rice grains,
Further, since the adhering substances remaining on the rice are removed by the sub-polishing machine B, the polishing effect of the rice grains becomes almost complete.

In the above embodiment, the case in which the sub-polishing machine B is arranged after the main polishing machine A and the sub-polishing machine B is used as a complement to the main polishing machine A is exemplified. Then, it is also possible to install the sub-polishing machine B in the front stage of the main polishing machine A and use the sub-polishing machine B as preliminary polishing rice for the main polishing machine A.

[0029]

As described above in detail in the embodiments,
According to the rice polishing apparatus of the present invention, agitation and transfer by the spiral fin of the main rice polishing machine cause friction between rice grains, and rice bran and peeled sugar that have separated from the rice grains are discharged to the outside by compressed air. As it is released and its reattachment is prevented,
You can polish rice efficiently and continuously. Further, since the rice grains are cooled by the compressed air of the main polishing machine, it is possible to prevent the rice grains to be polished from being deteriorated. Further, in the rice polishing apparatus of the present invention, the main and secondary rice polishing machines are continuously arranged to perform the rice polishing of the rice grains, so that the deposits of the rice grains can be almost completely removed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a rice polishing apparatus according to the present invention.

FIG. 2 is a longitudinal sectional view of an essential part showing an embodiment of the main polishing machine of the polishing machine according to the present invention.

FIG. 3 is a side view of FIG.

FIG. 4 is an explanatory diagram of a left end plate of the first drum shown in FIG.

5 is an explanatory diagram of a right end plate of the first drum shown in FIG.

FIG. 6 is a perspective view of a split unit used for the first drum shown in FIG.

FIG. 7 is a plan view of the division unit.

FIG. 8 is a side view of the split unit in an assembled state.

9 is a longitudinal sectional view of a main part of the sub-polishing machine shown in FIG.

FIG. 10 is a side view of FIG. 9.

FIG. 11 is an enlarged explanatory view of a main part of the nozzle shown in FIG.

[Explanation of symbols]

 A Main polishing machine B Secondary polishing machine 1 1st drum 2 Spiral fin 3 Compressed air supply pipe 4 Injection nozzle 50 2nd drum 51 Air supply pipe 52 Nozzle

Claims (1)

[Claims] 1. A polishing rice comprising a main polishing machine and a secondary polishing machine installed in front of or behind this primary polishing machine, wherein rice grains are continuously polished by said primary and secondary polishing machines. An apparatus, wherein the main milling machine is housed in a case, has a supply port and a discharge port at an end, and is provided with a large number of holes having a diameter smaller than the grain size of rice grains to be milled. And a rotationally driven perforated cylindrical first drum, and rice grains provided in the inner peripheral surface of the first drum are stirred from the supply port side to the discharge port side while stirring the rice grains supplied into the first drum. The spiral fin to be transferred, the compressed air supply pipe provided along the axial direction of the first drum, the rice grain provided along the axial direction of the compressed air supply pipe and being transferred by the spiral fin Has a plurality of nozzles for ejecting compressed air, and the sub-polishing machine is housed in a case and has a supply port at the end. A second perforated cylindrical drum having an outlet and provided with a large number of holes having a diameter smaller than the grain size of the rice grain to be milled; and provided along the axial direction of the second drum. An air supply pipe, and a plurality of nozzles provided along the axial direction of the air supply pipe and ejecting a swirling flow for transferring rice grains to be milled from the supply port side to the discharge port side, Rice polishing equipment.