JP2001017872A - Rice-milling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a compact rice-milling apparatus for wholly and certainly milling brown rice supplied into the apparatus to discharge milled rice without leaving the same and easy in automation. SOLUTION: In a rice milling apparatus 10, a rice bran removing blower 138 is stopped in almost synchronous relation to the opening of a milled rice discharge port 86. Since brown rice supplied to a rice-milling chamber 76 at last flows down naturally, brown rice is discharged wholly and certainly without being left. Since brown rice is delivered only by rotating a cylindrical valve disc 26 in this rice-milling apparatus, the capacity of a delivery motor may be relatively small and automation is easy and the apparatus can be made compact as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice milling apparatus for milling brown rice into white rice.

[0002]

2. Description of the Related Art In a rice milling machine, a milling room is formed between a milling roll and a milling cylinder surrounding the milling roll. A brown rice receiving port is formed in one of the milling chambers, and a white rice outlet is formed in the other rice milling chamber. Is equipped with a pressure valve. In this rice milling machine, brown rice is continuously pressed and supplied from the brown rice receiving port to the rice milling room, pressurized and agitated by the rice mill roll to become white rice, and the pressure valve is opened to be continuously discharged from the white rice discharge □. It has become. In other words, the pressing force of the same brown rice in the rice milling room (rice polishing pressure)
The brown rice is agitated and rubs each other, and the bran layer on the surface is peeled off to become white rice and discharged.

[0003] By the way, in a normal rice milling machine, the first brown rice is insufficiently pressurized in order to enter an empty rice milling chamber, and is pressed and discharged by the subsequent brown rice without being sufficiently pressurized and stirred. do not become. On the other hand, the last brown rice does not have the following brown rice to be pressed and thus has insufficient rice polishing pressure. In addition, since the pressure valve for which the rice milling pressure is insufficient cannot be pushed open, there is no discharge. Therefore, the remaining rice that is not discharged is mixed with brown rice (of another variety) that is subsequently polished.

[0004] In order to solve such inconvenience, there is a quantitative rice polishing apparatus which has already been proposed by the present applicant (Japanese Patent Publication No. Hei 3-6).
5233). This is a configuration in which brown rice is stirred for a prolonged period of time to produce white rice even if the rice polishing pressure in the rice polishing room is insufficient. That is, white rice is stirred for a comparatively long period of time without discharging only the first brown rice, and then brown rice is continuously supplied, and then the rice is polished normally to white rice and continuously discharged. When the continuous supply is not completed, the last brown rice is stirred for a relatively long period of time without discharging to produce white rice, and then discharged as appropriate.

[0005]

By the way, the above-mentioned conventional fixed-quantity rice milling apparatus has a two-stage upper and lower slide shutter provided above the milling chamber for supplying brown rice, and a pressure valve provided below the milling chamber for discharging white rice. Was manually operated, and its use was limited to a case where a small amount of test rice was milled. Therefore, it could not be adopted as a so-called coin rice mill which automatically and automatically mills rice by inserting coins. Even if the slide shutter is automatically opened and closed, a considerable amount of brown rice weight acts on the slide shutter, requiring a relatively large-capacity motor, pneumatic cylinder or hydraulic cylinder, etc. turn into.

The present invention has been made in consideration of the above-mentioned facts, and provides a compact rice mill which can surely mill all the brown rice supplied into the apparatus and discharge it without residue, and which is easy to automate and compact. With the goal.

[0007]

According to a first aspect of the present invention, there is provided a rice milling apparatus comprising: a hopper having a brown rice supply port formed at a lower end thereof; brown rice detecting means for detecting the presence or absence of brown rice in the hopper; Along with the milling roll having a direction inclined with respect to the direction is the axial direction, a porous milling cylinder is provided around the milling roll to cover the milling roll, and a gap between the milling roll and the milling cylinder is provided. A rice milling chamber, a brown rice receiving port is formed above the rice milling chamber, and a white rice discharge port is formed below the rice polishing chamber, and rice milling means for milling brown rice supplied from the hopper; And a cylindrical valve body formed with a plurality of openings communicating with the brown rice supply port through at least one of the plurality of openings at the first rotation position, and at the second rotation position, the plurality of openings at the second rotation position. Small opening At least one of the plurality of openings communicates with the brown rice inlet through at least one of the plurality of openings, and the brown rice supply port communicates with the brown rice inlet through at least one of the plurality of openings. Feeder means for communicating or blocking the brown rice receiving port with the brown rice receiving port; rotating the cylindrical valve body containing the brown rice at the first rotational position to the second rotational position; Feeding control means for rotating the cylindrical valve body to a third rotation position after a lapse of a predetermined time required to supply and mill rice to the rice milling chamber, and sucking the bran shaved off from the brown rice in the rice milling chamber. A rice bran removing means for discharging to the outside of the rice milling cylinder, a pressure valve which is urged in a direction to close the white rice discharge port and is opened / closed according to the rice polishing pressure in the rice polishing chamber, and brown rice in the hopper is eliminated. Is detected by the brown rice detecting means, The drives the pressure valve after a predetermined time required for rice brown rice remaining in serial rice chamber and a, and discharge control means for opening the rice outlet.

[0008] According to the rice polishing apparatus having the above configuration, when the cylindrical valve body is in the first rotation position, the lumen of the cylindrical valve body is connected to the brown rice supply port through at least one of the openings formed in the cylindrical valve body. However, since the inner space of the brown rice receiving port and the cylindrical valve body is shut off, the brown rice in the hopper flows down from the brown rice supply port into the cylindrical valve body through the opening of the cylindrical valve body and is housed therein. When the inner stay of the cylindrical valve body is filled with brown rice, the cylindrical valve body is rotated to the second rotation position by the feeding control means.

In the second rotation position, the inner cavity of the cylindrical valve body communicates with the brown rice receiving port through at least one of the openings, but is isolated from the brown rice supply port. It flows down to the empty rice milling room through the receiving port and is supplied first. This first brown rice has a small amount and no subsequent brown rice to be pressed because it has only the inner cavity of the cylindrical valve body. Therefore, this first brown rice is insufficiently pressured in the rice polishing room, cannot open the pressure valve, and is stirred with insufficient pressure without being discharged. However, because of insufficient pressure but not opening the pressure valve,
Since the first brown rice is squeezed for a relatively long time, it is milled into white rice. When a predetermined time required for the first brown rice to become white rice has elapsed, the cylindrical valve body is rotated to the third rotation position by the feeding control means.

In the third rotational position, the inner cavity of the cylindrical valve body communicates with both the brown rice supply port and the brown rice receiving port, so that the brown rice in the hopper is opened from the brown rice supply port to the opening of the cylindrical valve body and the cylindrical valve body. It continuously flows down into the rice milling chamber via the inner cavity and the brown rice receiving port, and is supplied under pressure. Then, the pressing force (milling pressure) between the brown rice in the milling chamber is moderately increased, and the milling roll is pressurized and stirred to form white rice, and the pressure valve is pushed open to continuously flow down from the white rice discharge port to be discharged. . The first white rice milled when the cylindrical valve element was in the second rotation position was the third milled rice.
At the rotation position, it is pressed by the subsequent white rice and is discharged first.

When brown rice in the hopper runs out, there is no subsequent brown rice to be pressed in the milling room. For this reason, a small amount of brown rice remaining at the end lacks rice polishing pressure, cannot open the pressure valve, and is stirred with insufficient pressure without being discharged. However, since the pressure is not enough but the pressure valve is not pushed open, the last brown rice is continuously squeezed for a relatively long time, so that it is polished to white rice.

When a predetermined time required for the last brown rice remaining in the rice milling room to become white rice has passed since the brown rice detecting means has detected that brown rice has disappeared in the hopper, the pressure valve is set to the discharge control means. , And the white rice outlet is opened. Then, the last white rice remaining in the rice milling room flows down from the white rice discharge port and is entirely discharged.

[0013] In the above-mentioned rice milling step, the bran shaved off from the brown rice in the rice milling chamber is sucked by the bran removing means and discharged to the outside of the rice milling cylinder through the pores on the peripheral surface of the rice milling cylinder.

As described above, according to the present rice milling apparatus, the brown rice supplied first and the brown rice finally supplied to the rice milling room are all reliably milled into white rice, and all of the brown rice itself flows without residue due to the natural flow of the white rice itself. It can be discharged reliably. In addition, since the configuration for supplying and stopping brown rice is a configuration in which the cylindrical valve body is simply rotated, it is sufficient to provide one relatively small-capacity motor. Further, the configuration for discharging and stopping the white rice is also a configuration in which only the pressure valve is opened and closed, so that it is sufficient to provide one relatively small-capacity motor. Therefore, the present rice milling apparatus can be a compact rice milling apparatus that can be easily automated and compact.

According to a second aspect of the present invention, in the first aspect of the present invention, the brown rice remaining in the rice polishing chamber is milled after the brown rice detecting means detects that the brown rice in the hopper has run out. After a lapse of a predetermined time necessary for the rice bran removal, the rice bran removing means is stopped substantially in synchronization with the opening of the white rice discharge port.

According to the rice milling apparatus having the above structure, after the brown rice detecting means detects that the brown rice has disappeared in the hopper,
When a predetermined time required for the last brown rice remaining in the rice polishing room to become white rice has elapsed, the pressure valve is driven by the discharge control means, and the white rice discharge port is opened. Almost in synchronism with this, the bran removing means is stopped by the bran removing control means. The bran removing means sucks and discharges the bran generated in the rice milling room from the perforations on the peripheral surface of the rice milling cylinder. At this time, the white rice is also suctioned from the perforations on the peripheral surface of the rice polishing cylinder, and the white rice flows down naturally. The function of preventing discharge from the outlet works. However, in the present invention, since the bran removing means is stopped, the last white rice remaining in the rice milling chamber flows smoothly and naturally, and is more reliably discharged from the white rice discharge port.

[0017]

FIG. 1 shows the configuration of a rice polishing apparatus 10 according to an embodiment of the present invention. Rice polishing equipment 1
Numeral 0 is provided with a box-shaped machine frame 12, on which a funnel-shaped hopper 14 is provided. A brown rice supply port 18 is formed at the lower end of the hopper 14, and a flow rate adjusting shutter 16 is
Are slidably mounted. A brown rice sensor 20 as brown rice detecting means is attached to a lower portion in the hopper 14 so that the presence or absence of brown rice in the hopper 14 can be detected.

Below the hopper 14, a rice milling means 48, which will be described later, is provided, and the feeding means 22 is interposed between the hopper 14 and the rice milling means 48. The feeding means 22 includes a housing 24, in which a cylindrical valve body 26 having an axis extending in a horizontal direction is rotatably fitted around the axis. Openings 28 and 30 are formed in the peripheral wall of the cylindrical valve body 26 so as to penetrate the inner cavity of the valve body 26. An upper channel 32 is formed in the upper part of the housing 24 so as to communicate with the openings 28 and 30 of the cylindrical valve body 26 and the brown rice supply port 18 of the hopper 14.
A lower channel 42 is formed in the lower part of the housing 24 and communicates with the openings 28 and 30 of the cylindrical valve body 26 and the brown rice receiving port 62 of the rice polishing means 48.

Here, the positional relationship between the openings 28, 30 of the cylindrical valve element 26 and the upper and lower flow paths 32, 42 of the housing 24 will be described.
The state where the opening 28 communicates with the upper flow path 32 and the opening 30 is closed (first rotational position (see FIG. 3)), and the state where the opening 28 communicates with the lower flow path 42 and the opening 30 is closed (second state). The rotation position (see FIG. 4) and the state where the opening 28 communicates with the lower flow path 42 and the opening 30 communicates with the upper flow path 32 (third rotation position (see FIG. 5)). . That is, the inner cavity of the rotating cylindrical valve body 26 communicates only with the brown rice supply port 18 at the first rotation position, communicates only with the brown rice receiving port 62 at the second rotation position, and at the third rotation position.
8 and the brown rice receiving port 62 are connected to each other, whereby the brown rice supplying port 18 and the brown rice receiving port 62 are communicated or blocked.

As shown in FIG. 2, on one side wall of the housing 24, a delivery motor 3 for rotating a cylindrical valve body 26 is provided.
4 is attached. The other side wall of the housing 24 has a cam plate 3 that rotates integrally with the cylindrical valve body 26.
6 and a limit switch 38 corresponding to the outer peripheral surface thereof. A plurality of protrusions (not shown) are formed on the outer peripheral surface of the cam plate 36, and the limit switch 38 is turned ON / OFF by engaging with the protrusions. The feed motor 34 and the limit switch 38 are electrically connected to a computer 70 of an operation panel 68 having a built-in program as feed control means. The computer 70 turns on the limit switch 38
After receiving the OFF signal, a signal is transmitted to the feeding motor 34 a predetermined time after the clocking, and the cylindrical valve element 26 is operated. 46 is an operation switch.

The rice milling means 48 includes an upper outer cylinder 46 and a grain feeding cylinder 44 integrally connected to each other with the axis line inclined.
The main shaft 50 is rotatably supported by a bearing inside the bearing. A grain-feeding spiral 78 is fitted on the main shaft 50 in the grain-feeding cylinder 44, and the grain-feeding chamber 8 is provided between the grain-feeding cylinder 44 and the grain-feeding spiral 78.
8 are formed. An opening is formed in the upper surface of the peripheral wall of the grain feeding cylinder 44, and a portion where the lower flow path 42 is formed is fitted into the opening, and the lower flow path 42 and the grain feeding chamber 88 communicate with each other. The junction between the lower channel 42 and the grain feeding chamber 88 forms a brown rice receiving port 62 of the rice milling means 48.

An outer shell 66 having an annular head plate 64 and a bottom plate 84 is fixed to the lower end of the grain feeding cylinder 44. Inside the outer shell 66, a rice mill 76 made of a perforated plate is provided with a head plate 64.
And the bottom plate 84. On the main shaft 50 in the rice milling cylinder 76, a rice milling roll 80 having a ridge 82 on its peripheral surface is directly fitted and fitted to a grain feeding spiral 78. Thus, a space between the milling roll 80 and the milling cylinder 76 is defined as a milling chamber 74 that communicates with the grain feeding chamber 88 (a space between the milling cylinder 76 and the outer shell 66 is defined as a bran removing chamber 77. Is formed with a white rice discharge port 86 communicating with the rice milling chamber 74.

The main shaft 50 is connected to a rice polishing motor 56 via a belt 52. The rice polishing motor 56 includes an operation panel 68
, And is driven based on a signal from the computer 70. In the present embodiment, the axis of the main shaft 50 is set in the inclined direction, but may be set in the vertical direction.

The bran removing means 130 includes a bran removing blower 138 directly connected to a bran removing motor 140, and its suction pipe 1.
Reference numeral 34 is connected to an opening formed in one side wall of the outer casing 66. Thus, the bran removing chamber 77 communicates with the suction port of the bran removing blower 138. The bran removing motor 140 is electrically connected to the computer 70 of the operation panel 68 in which a program as a rub control means is built.
It is driven based on a signal from 0.

On the lower surface of the bottom plate 84, a substantially U-shaped discharge gutter 10 is provided.
Reference numeral 0 is fixed, and a support shaft 98 is rotatably mounted on the support shaft 98. A lever 96 is mounted inside the gutter of the support shaft 98, and a pressure valve 9 for opening and closing a white rice discharge port 86 is provided at the end of the lever 96.
0 has been contacted. An arm 102 is attached to the outside of the gutter of the support shaft 98. A pressure adjusting motor 116 is attached to the head plate 64 via a bracket 108, and a feed screw 114 is connected to a main shaft thereof. The slider 106 is screwed into the feed screw 114, and a guide rod 112 for locking is fitted to the slider 106. Slider 10
Between the arm 6 and the arm 102, a tension spring 110 for adjusting the closing force of the white rice discharge port 86 by the pressure valve 90 is stretched. Thus, by moving the slider 106 upward, the white rice discharge port 86 is strongly closed, the pressure of the rice polishing in the rice polishing chamber 74 is increased, and the whiteness of the rice is increased. Further, by moving the slider 106 downward, the white rice discharge port 86 is weakly closed, the rice polishing pressure in the rice polishing chamber 74 is reduced, and the rice whiteness is reduced. By moving the slider 106 further downward, the white rice discharge port 86 is opened.
The pressure adjusting motor 116 is electrically connected to a computer 70 of an operation panel 68 in which a program as a discharge control means is built, and is driven based on a signal from the computer 70.

Next, the operation and effect of this embodiment will be described.

The initial state of the rice polishing apparatus 10 is a cylindrical valve element 26.
Are stopped at the first rotation position (see FIGS. 1 and 3). Flow adjustment shutter 16 and slider 10
The position of 6 has been previously properly adjusted. Here, when a predetermined amount of brown rice G is put into the hopper 14, the brown rice G is supplied from the brown rice supply port 18 to the upper channel 32 and the opening 28.
Through the inner wall of the cylindrical valve body 26 to be accommodated. This completes the preparation for starting operation.

Next, when the operation switch 72 is turned on, the rice milling motor 56 and the rice bran removing motor 140 are driven based on a signal from the computer 70, and the main shaft 50, the grain feeding spiral 7
8. The rice mill roll 80 and the bran blower 138 rotate.
In substantially synchronism with this, the feeding motor 34 is driven based on a signal from the computer 70, and the cylindrical valve body 26 rotates to the second rotation position (see FIG. 4). Here, the cam plate 36
The first projection engages the limit switch 38, and the computer 70 receives the signal to stop the feeding motor 34.

In this state, the brown rice G in the bore of the cylindrical valve element 26 flows down from the opening 28 through the lower flow path 42 and the brown rice receiving port 62 into the grain feeding chamber 88, and is forcibly pressed down by the grain feeding spiral 78. The rice is supplied to the empty rice milling room 74 first. The first brown rice G is stirred by the rice mill roll 80, but since there is no subsequent brown rice to be pressed in a small amount, the rice milling pressure in the rice milling chamber 74 is insufficient, and the pressure valve 90 cannot be pushed open. It is stirred without being discharged. However, the first brown rice G takes a relatively long time (for example, about 20 minutes after the cylindrical valve body 26 stops at the second rotation position).
Seconds) Continue to stir and mill rice to make white rice.

When the predetermined time has elapsed, the feeding motor 34 is driven again based on a signal from the computer 70, and the cylindrical valve body 26 rotates to the third rotation position (see FIG. 5). Here, the next projection of the cam plate 36 is engaged with the limit switch 38, and the computer 70 receives the signal to stop the feeding motor 34.

In this state, brown rice G in the hopper 14 continuously flows down from the brown rice supply port 18 to the graining room 88 via the upper flow path 32, the opening 30, the opening 28, the lower flow path 42, and the brown rice receiving port 62. It is forcibly pressed and supplied to the rice milling chamber 74 by the grain feeding spiral 78. Therefore, the brown rice G in the rice milling room 74
The pressing force (rice polishing pressure) between them is appropriately increased, and the mixture is pressurized and agitated by the rice mill roll 80 to become white rice H. The pressure valve 90 is pushed open and continuously discharged from the white rice discharge port 86.
The first white rice milled when the cylindrical valve body 26 is at the second rotation position is pressed by the subsequent white rice and brown rice at the third rotation position and is discharged first.

As shown in FIG. 6, when the brown rice in the hopper 14 runs out, there is no subsequent brown rice to be pressed in the milling chamber 74, so that the milling pressure in the milling chamber 74 becomes insufficient and the pressure valve 90 is turned off. It cannot be pushed open and is stirred without being discharged. However, the last brown rice G remaining in the rice milling room 74 also continues to be stirred for a relatively long predetermined time (for example, about 20 seconds after the brown rice sensor 20 detects that the brown rice has disappeared in the hook 14). Rice is polished to white rice.

When the predetermined time has elapsed, the pressure adjusting motor 116 is driven based on a signal from the computer 70, the slider 106 is moved downward, the pressure valve 90 is also moved downward, and the white rice discharge port 86 is opened. . Thereby, the last white rice remaining in the rice polishing room 74 flows down from the white rice discharge port 86 and is entirely discharged.

At this time, substantially in synchronization with the opening of the white rice discharge port 86, the rice bran removing motor 140 stops driving based on a signal from the computer 70, and the rotation of the rice bran removing blower 138 stops. The bran removal blower 138 has previously sucked and discharged the bran generated in the milling chamber 74 from the perforations on the peripheral surface of the milling cylinder 76. However, since the suction stopped here, the last white rice remaining in the milling chamber 74 was removed. Without the suction action from the peripheral surface of the rice milling cylinder 76, the rice flows smoothly and naturally, and the white rice discharge port 86
Is more reliably discharged from

Thereafter, the feeding motor 34 is driven based on a signal from the computer 70, and the cylindrical valve body 26 is moved to the first position.
Rotate to the rotation position. Here, the next projection of the cam plate 36 is engaged with the limit switch 38, the computer 70 receives the signal, stops the feeding motor 34, and returns to the initial state. Similarly, the pressure adjusting motor 116 is driven based on a signal from the computer 70, the slider 106 is moved upward, the pressure valve 90 is also moved upward, the white rice discharge port 86 is closed, and the initial state is returned. Next, when the operation switch 72 is pressed, the milling motor 56 stops driving based on a signal from the computer 70, and the main shaft 50, the grain feeding spiral 78, and the milling roll 80 stop rotating.

As described above, the present rice milling apparatus 10 includes the rice mill 7
Both the brown rice supplied first and the brown rice supplied last can be surely polished to white rice, and all of them can be reliably discharged by the natural flow of the white rice itself. In particular, since the bran removal blower 138 is stopped almost in synchronization with the opening of the white rice discharge port 86, the neck rice in the rice milling room 74 smoothly flows down naturally and is more reliably discharged from the white rice discharge port 86. You. Therefore, it is never mixed with brown rice (of another variety) which is subsequently polished.

Since the rice polishing apparatus 10 of the present invention is configured to rotate the cylindrical valve 26 only, it is sufficient to provide one motor having a relatively small capacity. Therefore, it is easy to automate and a compact rice mill can be provided.
For example, the present invention can be sufficiently applied as a so-called coin rice milling machine which automatically and automatically mills rice by inserting coins.

[0038]

As described above, according to the present invention, it is possible to obtain a compact rice mill which can surely mill all the brown rice supplied into the apparatus and discharge it without residue, and which can be easily automated and compact. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal configuration of a rice polishing apparatus according to one embodiment of the present invention.

FIG. 2 is a front view of the inside of the rice polishing apparatus according to one embodiment of the present invention.

FIG. 3 is an enlarged view of a main part of the rice polishing apparatus in a state where the cylindrical valve body is at a first rotation position.

FIG. 4 is an enlarged view of a main part of the rice polishing apparatus in a state where the cylindrical valve body is at a second rotation position.

FIG. 5 is an enlarged view of a main part of the rice polishing apparatus in a state where the cylindrical valve body is at a third rotation position.

FIG. 6 is a diagram corresponding to FIG. 3, showing a state in which the remaining amount of brown rice in the milling cylinder is reduced and the valve body is closed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Rice polishing apparatus 14 Hopper 18 Brown rice supply port 20 Brown rice sensor (brown rice detection means) 22 Feeding means 26 Cylindrical valve body 28 Opening 30 Opening 48 Rice polishing means 62 Brown rice receiving port 70 Computer (Padding control means, discharge control means,
Rice removal control means) 74 Rice polishing room 76 Rice polishing cylinder 80 Rice polishing roll 86 White rice discharge port 90 Pressure valve 130 Rice removal means

Continued on front page F-term (reference) 4D043 DA06 DH15 DH53 DH71 DH73 HA01 HB02 HB08 HB09 MA04 MA21 MA23 MB02 MB07 MB08 MB09 MB21

Claims (2)

[Claims] 1. A hopper having a brown rice supply port formed at a lower end, brown rice detecting means for detecting the presence or absence of brown rice in the hopper, and a longitudinal direction or a direction inclined with respect to the longitudinal direction is defined as an axial direction. Having a milling roll, a porous milling cylinder is provided around the milling roll to cover the milling roll, and between the milling roll and the milling cylinder is a milling chamber, and above the milling chamber. A brown rice receiving port, a white rice discharge port formed below, a rice milling means for milling brown rice supplied from the hopper, and a cylindrical valve body having a peripheral wall formed with a plurality of openings communicating the outside and the inner cavity. And at the first rotation position, communicates only with the brown rice supply port via at least one of the plurality of openings, and at the second rotation position, communicates with the brown rice receiving port via at least one of the plurality of openings. of And a third rotation position for communicating with the brown rice supply port and the brown rice receiving port through at least one of the plurality of openings to communicate or block the brown rice supply port and the brown rice receiving port. Means for rotating the cylindrical valve body accommodating brown rice at the first rotation position to a second rotation position, and supplying brown rice in the cylindrical valve body to the rice milling chamber at the second rotation position to perform rice polishing. Feeding control means for rotating the cylindrical valve body to a third rotation position after a lapse of a predetermined time; and bran removing means for sucking bran shaved off from the brown rice in the milling chamber and discharging the bran to the outside of the milling cylinder, A pressure valve that is urged in a direction to close the white rice discharge port, and is opened and closed according to the rice polishing pressure in the rice polishing chamber, and after the brown rice detecting means detects that brown rice in the hopper has run out, Necessary for milling brown rice remaining in the milling room Discharge control means for driving the pressure valve after a predetermined time has elapsed to open the white rice discharge port. 2. After a lapse of a predetermined time necessary for polishing brown rice remaining in the rice milling chamber after the brown rice detecting means detects that brown rice in the hopper has run out, the white rice discharge port is opened. 2. The rice milling device according to claim 1, further comprising a rice bran control means for stopping said rice bran means substantially in synchronization with the rice bran removal means.