JP3425544B2 - Rice milling equipment - Google Patents

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 for polishing brown rice into white rice.

[0002]

2. Description of the Related Art In a rice polishing apparatus, a rice polishing chamber is formed between a rice polishing roll and a rice polishing cylinder surrounding it, and a brown rice receiving port is formed on one side of the rice polishing chamber and a white rice discharging port is formed on the other side. Is equipped with a pressure valve. This rice polishing device is a pressure valve that continuously supplies brown rice from the brown rice inlet to the rice polishing chamber, pressurizes and agitates it with the rice polishing rolls into white rice, and closes the white rice discharge port formed at the lower end of the rice polishing chamber. The valve body of is pushed open and discharged continuously. That is, the pressing force of the same soil of brown rice in the rice polishing room (rice polishing pressure) is appropriately increased, so that the brown rice is stirred and rubbed against each other.
The bran layer on the surface is peeled off to form white rice, which is then discharged.

Further, the valve body of the pressure valve for closing the white rice discharge port is rotatable about this axis with the opening direction of the white rice discharge port as the axial direction, and when the brown rice and the white rice are agitated, It rotates together with the white rice, which suppresses unnecessary friction between the white rice near the valve body and the valve body.

[0004]

By the way, in the above-mentioned conventional rice polishing apparatus, the outer diameter of the valve body is sufficiently larger than the inner diameter of the white rice discharge port, and the bottom of the rice polishing chamber (that is, the white rice discharge port is formed). It is structured so that the white rice discharge port is closed by applying it from the outside of the rice polishing room.

However, in the conventional rice polishing apparatus having such a valve body, there is a possibility that the white rice discharged from the white rice discharge port is caught between the valve body and the bottom of the rice polishing chamber. That is, the pressure valve opens when the pressure of white rice and brown rice in the rice polishing chamber exceeds the urging force of the urging means for urging the valve body.
Therefore, if the white rice is sequentially discharged from the white rice outlet and the pressure of the white rice and brown rice in the rice polishing chamber is less than the urging force of the urging means, the valve body naturally closes the white rice outlet. When there is white rice on the valve body and outside the white rice discharge port when the valve body closes the white rice discharge port, the white rice is sandwiched between the valve body and the bottom of the rice polishing chamber. In this way, when the white rice is sandwiched between the valve body and the bottom of the rice polishing chamber, a gap corresponding to the size of the sandwiched rice is formed between the valve body and the bottom of the rice polishing chamber. In the state immediately before the end of rice polishing, the amount of brown rice in the rice polishing chamber is small and there is no pressure, so it takes time to stir to polish the rice, but as mentioned above, there is a gap between the valve body and the bottom of the rice polishing chamber. In this case, there is a possibility that brown rice in the middle of rice polishing may be discharged as it is from this gap.

Since the valve body is biased, the sandwiched white rice may be cracked or crushed by the sandwiching force between the valve body and the bottom of the rice polishing chamber. However, it is not preferable that the white rice be sandwiched between the valve body and the bottom of the rice polishing chamber.

In view of the above facts, an object of the present invention is to obtain a rice polishing apparatus capable of preventing pinched rice from being trapped between the bottom of the rice polishing chamber and the valve body.

[0008]

[Means for Solving the Problems] The rice polishing apparatus according to claim 1 is a rice polishing chamber in which a white rice discharge port for discharging white rice is formed at the lower end side, and a rice polishing roll for polishing rice by stirring the brown rice contained in the rice polishing chamber. And a rotatable valve body which is fitted into the white rice discharge port of the rice polishing chamber from the outside of the rice polishing chamber to close the white rice discharge port, and urging means for urging the valve body in a direction of being fitted into the white rice discharge port. and a pressure valve having a further said rice
The rice mill roll has a guide hole that opens to the outlet side.
Formed and inserted into the guide hole, the valve body is
A guide shaft for guiding the inside of the discharge port is provided on the valve body,
It is characterized by that.

According to the rice polishing apparatus having the above construction, when the brown rice contained in the rice polishing chamber is agitated by the rice polishing rolls, the brown rice rubs against each other, and the friction at this time scrapes off the bran from the brown rice to form white rice. . Since the larger the pressure acting on the brown rice is, the friction at this time causes the brown rice on the bottom side of the rice polishing chamber to be polished earlier. Also, the white rice discharge port at the bottom of the rice polishing chamber is closed by the valve body of the pressure valve, but since this valve body is rotatable around this axis with the opening direction of the rice discharge port as the axial direction, it is possible to use brown rice and white rice. When is stirred, the valve body acted on by the pressure from the brown rice and the white rice rotates together with the brown rice and the white rice. Therefore, unnecessary friction does not occur between the white rice on the bottom side and the valve body.

Next, when the pressure in the rice polishing chamber exceeds the urging force of the urging means by the brown rice which is sequentially pressed and supplied into the rice polishing chamber, the valve body is pushed open and the white rice flows out from the white rice discharge port.

When the unpolished rice to be supplied eventually disappears in the final stage of rice polishing, the pressure in the rice polishing chamber falls below the urging force of the urging means, and the urging means inserts the valve body into the white rice discharge port and closes the white rice discharge port. In this state, unpolished unpolished rice remaining in the rice polishing chamber is continuously stirred and polished to become white rice.
This white rice will be discharged from the white rice discharge port that is opened again to the appropriate means. Furthermore, a guide provided on the valve body
The shaft is inserted into the guide hole formed in the rice mill roll
Therefore, the valve body with the white rice discharge port opened was inserted into the white rice discharge port.
When it is pushed, the guide shaft is further pushed into the guide hole.
At this time, in the direction orthogonal to the axial direction of the guide hole
The displacement of the guide shaft is limited by the inner circumference of the guide hole.
Therefore, the guide shaft should move only in the axial direction of the guide hole.
become. Therefore, the valve body with the integrated guide shaft
Also moves only in the axial direction of the guide hole to smoothly discharge white rice
It is inserted in the mouth.

In this rice polishing apparatus, the valve body is fitted into the polished rice discharge port to close the polished rice discharge port. Therefore, it is not possible to sandwich the polished rice between the bottom outer surface of the polishing chamber and the valve body. In addition, the white rice outlet can be securely closed to prevent the flow of unpolished unpolished rice, and the cracking of white rice due to the pinching of white rice between the outer surface of the bottom of the rice polishing chamber and the valve body can be prevented. , The quality of milled rice can be improved.

Although the structure of the present invention is not particularly limited, the outer diameter of the valve body is additionally described as follows.
If the outer diameter of the valve body and the inner diameter of the white rice discharge port are exactly the same, the valve body cannot be fitted into the white rice discharge port, or even if it is possible, smooth rotation of the valve body is hindered. Therefore, the outer diameter of the valve body is smaller than the inner diameter of the white rice discharge port, but naturally, the smaller the gap between the outer periphery of the valve body and the inner periphery of the white rice discharge port, the better. .
However, even if a gap is formed, if the width dimension of the gap is less than the short diameter dimension of the polished rice, the polished rice will not be caught in the gap.

[0014]

[0015]

The rice according to claim 2, wherein, in the present invention of claim 1 Symbol mounting, the outer diameter of the valve body, only the tip fits into the milled rice discharge port to the inner diameter of the milled rice discharge port Correspondingly, the other portion is characterized by being sufficiently smaller than the inner diameter dimension of the white rice discharge port.

According to the rice polishing apparatus having the above structure, the outer diameter of the valve body is sufficiently smaller than the inner diameter of the white rice discharge port except the tip portion, so that the valve body is fitted into the white rice discharge port. In this state, a sufficient gap is formed between the other portion and the inner peripheral portion of the white rice discharge port. By forming this gap, even if particles and the like formed in the rice polishing process are present between the outer peripheral portion of the valve body and the inner peripheral portion of the white rice discharge port, the valve body is inserted when it is fitted into the white rice discharge port. It enters into the above-mentioned gap from between the outer peripheral portion of and the inner peripheral portion of the white rice discharge port and falls as it is. Therefore, the smooth fitting of the valve body into the white rice discharge port is not hindered by the particles and the like.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a rice polishing apparatus 10 according to a first embodiment of the present invention. The rice polishing apparatus 10 is provided with a box-shaped machine frame 12, and a funnel-shaped hopper 14 is arranged on the top thereof. A brown rice supply port 18 is formed at the lower end of the hopper 14, and a flow rate adjusting shutter 16 is slidably attached to this. A brown rice sensor 20 as brown rice detecting means is attached to the lower portion of the hopper 14 so that the presence or absence of brown rice in the hopper 14 can be detected.

A rice polishing means 48, which will be described in detail later, is disposed below the hopper 14, and a feeding means 22 is interposed between the hopper 14 and the rice polishing means 48. The feeding means 22 includes a housing 24, and a cylindrical valve body 26 having an axis in the horizontal direction is fitted inside the housing 24 so as to be rotatable around the axis. The peripheral wall of the cylindrical valve body 26 is formed with openings 28 and 30 penetrating the inner cavity of the valve body 26. An upper flow path 32 that communicates with the openings 28, 30 of the cylindrical valve body 26 and the brown rice supply port 18 of the hopper 14 is formed in the upper portion of the housing 24. In the lower part of the housing 24, the openings 28 and 30 of the cylindrical valve body 26 and the brown rice receiving port 6 of the rice polishing means 48 are provided.
A lower flow path 42 communicating with 2 is formed.

The positional relationship between the openings 28, 30 of the cylindrical valve body 26 and the upper and lower flow paths 32, 42 of the housing 24 will now be described.
A state in which the opening 28 communicates with the upper flow path 32 and the opening 30 is closed (first rotation position (see FIG. 3)), and a state in which the opening 28 communicates with the lower flow path 42 and the opening 30 is closed (second). The rotational position (see FIG. 4)) and the state in which the opening 28 communicates with the lower channel 42 and the opening 30 communicates with the upper channel 32 (third rotational 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 reception port 62 at the second rotation position, and the brown rice supply port 1 at the third rotation position.
8 and the brown rice receiving port 62 are communicated with each other, whereby the brown rice supply port 18 and the brown rice receiving port 62 are communicated with or cut off from each other.

As shown in FIG. 2, a feeding motor 3 for rotating a cylindrical valve body 26 is provided on one side wall of the housing 24.
4 is attached. On the other side wall of the housing 24, the cam plate 3 that rotates integrally with the cylindrical valve body 26 is provided.
6 and a limit switch 38 corresponding to the outer peripheral surface thereof are attached. Protrusions (not shown) are formed at a plurality of locations 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 feeding motor 34 and the limit switch 38 are electrically connected to a computer 70 of an operation panel 68 containing a program as feeding control means. The computer 70 turns on the limit switch 38.
After the OFF signal is received, a signal is transmitted to the feeding motor 34 a predetermined time after the time is counted to operate the cylindrical valve body 26. Further, the operation panel 68 is provided with an operation switch 72 connected to the computer 70.

The rice polishing means 48 is provided with an upper outer cylinder 46 and a grain feeding cylinder 44 which are integrally connected with each other with the axis line inclined.
A main shaft 50 is rotatably supported with a bearing interposed therein. A grain feeding spiral 78 is fitted to 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 is formed. An opening is formed in the upper surface of the peripheral wall of the grain transfer cylinder 44, and a portion in which the lower flow path 42 of the housing 24 is formed is fitted therein, so that the lower flow path 42 and the grain transfer chamber 88 communicate with each other. The joint between the lower flow path 42 and the grain transfer chamber 88 serves as the brown rice receiving port 62 of the rice polishing 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 cylinder 66, a rice polishing cylinder 76 made of a perforated plate is attached to the head plate 6.
4 and the bottom plate 84 are fixed. A cylindrical rice-polishing roll 80 having a ridge 82 on its peripheral surface is directly connected and fitted to the grain feeding spiral 78 on the main shaft 50 in the rice-polishing cylinder 76. As a result, the space between the rice-polishing roll 80 and the rice-polishing cylinder 76 is in the grain transfer chamber 88.
A rice milling chamber 74 communicating with the rice milling chamber 74 is provided between the rice milling cylinder 76 and the outer casing 66. On the bottom plate 84, a circular white rice discharge port 86 that communicates with the rice polishing chamber 74 is formed coaxially with the main shaft 50.

On the other hand, the main shaft 50 is connected to a rice polishing motor 56 via a belt 52. The rice polishing motor 56 is electrically connected to the computer 70 of the operation panel 68,
It is designed to be driven based on a signal from the computer 70. In addition, although the spindle 50 has the axis line in the tilt direction in the present embodiment, it may be in the vertical direction.

The debranching means 130 is provided with a debranching blower 138 which is directly connected to the debranching motor 140.
Eight suction tubes 134 are connected to an opening formed in one side wall of the outer casing 66. As a result, the bran removal chamber 77 communicates with the suction port of the bran blower 138. Bran motor 140
Is electrically connected to a computer 70 of an operation panel 68 having a built-in program as the bran control means, and is driven based on a signal from the computer 70.

Further, as shown in FIG. 7, a valve body 152 constituting the pressure valve 150 is provided near the bottom plate 84. The valve body 152 has a substantially disc shape, and the outer diameter dimension thereof is slightly smaller than the inner diameter dimension of the white rice discharge port 86, so that the valve body 152 can be fitted inside the white rice discharge port 86. Almost no gap is formed between the inner peripheral portion and the inner peripheral portion, or even if a gap is formed, the opening width of the gap is less than the short diameter dimension of general white rice.

A guide shaft 154 serving as a guide means extends from one axial end of the valve body 152 (that is, the end facing the inside of the rice polishing tube 76 when fitted into the white rice discharge port 86). Has been issued. The guide shaft 154 is formed along the axis of the disc-shaped valve body 152, and as shown in FIG. 5, even when the valve body 152 is pulled out from the white rice discharge port 86, its longitudinal intermediate portion. To the tip side is rice polishing tube 7
It goes inside the 6.

On the other hand, the inner hole portion of the above-mentioned rice polishing roll 80 has a guide hole 156 having a circular opening cross-section on the lower end side from the middle portion in the opening direction, and the guide shaft 15
4 is inserted. The inner diameter of the guide hole 156 is set to be slightly larger than the outer diameter of the guide shaft 154, and the guide shaft 154 fitted into the guide hole 156 can smoothly slide along the guide hole 156. The displacement of the guide hole 156 in the radial direction (that is, the direction orthogonal to the opening direction of the guide hole 156) is restricted by the inner peripheral portion of the guide hole 156.

On the lower surface of the bottom plate 84, a substantially U-shaped discharge gutter 10 is provided.
0 is fixed, and a support shaft 98 is rotatably installed on this. A lever 96 is attached inside the trough of the support shaft 98, and a bearing shaft 162 is rotatably connected to the tip of the lever 96. A bearing portion 158 composed of, for example, a ball bearing or the like is connected to the tip portion of the bearing shaft 162. The bearing portion 158 is fitted and inserted into a shaft hole 160 coaxially formed at the other axial end portion of the valve body 152, and rotatably supports the valve body 152. An arm 102 is attached to the outside of the gutter of the support shaft 98. Headboard 64
A pressure adjusting motor 116 is attached to the shaft via a bracket 108, and a feed screw 114 is connected to its main shaft. The slider 106 is screwed onto the feed screw 114,
A guide rod 112 for stopping rotation is fitted to this. A tension spring 110 is stretched between the slider 106 and the arm 102 as a biasing means for adjusting the closing force of the white rice discharge port 86 by the pressure valve 150. Then, by moving the slider 106 upward, the white rice discharge port 86 is strongly closed to increase the rice polishing pressure in the rice polishing chamber 74 and increase the whiteness of the rice. Further, by moving the slider 106 downward, the white rice discharge port 86 is weakly closed to lower the rice polishing pressure in the rice polishing chamber 74 and reduce the whiteness of the rice. By moving the slider 106 further downward, the white rice discharge port 86 is opened. The pressure adjusting motor 116 is
Operation panel 68 with a built-in program as discharge control means
It is electrically connected to the computer 70 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 body 26.
Is stopped at the first rotation position (see FIGS. 1 and 3). Flow rate adjusting shutter 16 and slider 10
The position of 6 has been properly adjusted in advance. 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 flow path 32 and the opening 28.
After that, it flows down and is housed in the inner cavity of the cylindrical valve body 26. This completes the preparations for starting operation.

Next, when the operation switch 72 is turned on, the rice polishing motor 56 and the bran removing motor 140 are driven based on the signal from the computer 70, and the spindle 50 and the grain feeding spiral 7 are driven.
8. The milled rice roll 80 and the bran blower 138 are rotated.
Almost in 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 protrusion of the lock lever 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 inner cavity of the cylindrical valve body 26 flows down from the opening 28 to the grain feeding chamber 88 through the lower flow path 42 and the brown rice receiving port 62, and is forcedly pushed down by the grain feeding spiral 78. And are first supplied to an empty rice polishing chamber 74. This first unpolished rice G is agitated by the milled rice roll 80, but since there is no subsequent unpolished brown rice to be pressed, the rice polishing pressure in the rice polishing chamber 74 is insufficient and the pressure valve 150 cannot be opened. , Stirred without being discharged. However, this first brown rice G has a relatively long predetermined time (for example, about 20 times after the cylindrical valve body 26 is stopped at the second rotation position).
Seconds) The rice is milled and turned into white rice with continuous stirring.

Further, even if a small amount of brown rice G is stored in the rice polishing chamber 74, the valve body 1 for closing the white rice discharge port 86 is closed.
The pressure of brown rice G stored in the rice polishing chamber 74 acts on 52. Therefore, when the brown rice G is agitated while the pressure of the brown rice G acts on the valve body 152, the brown rice G and the valve body 152 are agitated.
Rotates. As a result, the valve body 152 and the valve body 152
Friction with brown rice G in the vicinity of is reduced and brown rice G
Are milled only by mutual friction.

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

In this state, the brown rice G in the hopper 14 continuously flows down from the brown rice supply port 18 to the grain transfer chamber 88 through the upper flow path 32, the opening 30, the opening 28, the lower flow path 42 and the brown rice receiving port 62, The grain feeding spiral 78 forcibly supplies the rice to the rice polishing chamber 74. Therefore, the brown rice G in the rice polishing room 74
The pressing force (rice-polishing pressure) between the two is moderately increased, and the rice is rolled under pressure by the rice-polishing roll 80 to become white rice H, and the pressure valve 150 is pushed open to be discharged continuously from the white rice discharge port 86. The first polished rice polished when the cylindrical valve body 26 is in the second rotation position is pressed by the subsequent white rice / brown rice at the third rotation position and is first discharged.

As shown in FIG. 6, when the brown rice in the hopper 14 is exhausted, there is no subsequent brown rice to be pressed in the rice polishing chamber 74. Therefore, the rice polishing pressure in the rice polishing chamber 74 is insufficient and the valve body 152 is It moves toward the white rice discharge port 86 by the urging force of the tension spring 110. Here, as described above, since the tip end side of the guide shaft 154 of the valve body 152 is fitted into the guide hole 156 of the rice polishing roll 80, this guide hole 15
6, the guide shaft 154 is inserted into the guide hole 156 and the valve body 152 moves. As a result, the valve body 152 is smoothly fitted into the white rice discharge port 86, and the valve body 152
Closes the white rice discharge port 86. In this state, the valve body 152
The white rice does not get caught between the white rice discharge port 86 and the white rice outlet 86.

In this state, the brown rice G cannot push open the valve body 152 and is agitated without being discharged. However, this last brown rice G remaining in the rice polishing chamber 74 also has a relatively long predetermined time (for example, about 20 seconds after the brown rice sensor 20 detects that there is no brown rice in the hopper 14).
The rice is milled into white rice while being continuously stirred.

When this predetermined time elapses, the pressure adjusting motor 116 is excited based on the signal from the computer 70, the slider 106 moves downward and the pressure valve 150 also moves downward,
The white rice discharge port 86 is opened. As a result, the rice polishing room 74
The last white rice remaining in the above is discharged from the white rice discharge port 86 and discharged.

At this time, substantially in synchronization with the opening of the white rice discharge port 86, the bran removing motor 140 stops driving based on the signal from the computer 70, and the rotation of the bran removing blower 138 stops. The debranching blower 138 has sucked and discharged the bran that has been generated in the rice-polishing chamber 74 so far from the perforations on the peripheral surface of the rice-polishing cylinder 76. It is not affected by the suction action from the surface of the rice polishing tube 76 and smoothly flows down to the ground rice discharge port 86.
Is more reliably discharged from.

After that, the feeding motor 34 is driven based on the 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 protrusion of the cam plate 36 engages 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 150 is also moved upward, the white rice discharge port 86 is closed, and the state returns to the initial state. Next, when the operation switch 72 is pressed, the rice-polishing motor 56 stops driving based on the signal from the computer 70, and the spindle 50, the grain-feeding spiral 78 and the rice-polishing roll 80 stop rotating.

As described above, the rice polishing apparatus 10 is provided with the rice polishing chamber 7
Both the brown rice firstly supplied and the brown rice lastly supplied to No. 4 can be surely milled into white rice, and can be surely discharged without remaining by the natural flow of the white rice itself. Particularly, since the debranching blower 138 is stopped almost in synchronization with the opening of the white rice discharge port 86, the necked rice in the rice polishing chamber 74 smoothly flows down naturally and is more reliably discharged from the white rice discharge port 86. It Therefore, the next step is to polish rice (of another variety)
It is never mixed with brown rice.

Further, since the brown rice feeding structure of the present rice polishing apparatus 10 is a structure in which only the cylindrical valve body 26 is rotated, it is sufficient to provide one relatively small capacity motor. Therefore, it is possible to provide a compact rice polishing apparatus that can be easily automated, and can be sufficiently applied to, for example, a so-called coin rice polishing machine that automatically performs automatic rice polishing by inserting coins.

Next, a second embodiment of the present invention will be described. In the description of the second embodiment, regarding the basically same parts as those in the first embodiment,
The same reference numerals are given and the description thereof is omitted.

FIG. 8 shows the construction of the essential parts of a rice polishing apparatus 180 according to the second embodiment of the present invention. As shown in this figure, the present rice polishing apparatus 180 is provided with a valve body 182 instead of the valve body 152, and other configurations are basically the same as those of the rice polishing apparatus 10 described above.

The valve body 182 is provided with a substantially frustoconical fitting portion 184 whose outer diameter size gradually decreases from the tip end side fitted into the white rice discharge port 86 toward the other end side. Fitting part 184
Has a maximum outer diameter that is substantially the same as the outer diameter of the valve body 152 described above.
When the valve body 182 is fitted, there is almost no gap formed between the valve body 182 and the inner peripheral portion of the white rice discharge port 86, or even if a gap is formed, the opening width of the gap is less than the short diameter dimension of general white rice. Is. In other words, in the minimum outer diameter portion of the fitting portion 184, a sufficiently large gap is formed between the inner peripheral portion of the white rice discharge port 86.

The guide shaft 154 is coaxially extended from the large-diameter side end portion of the fitting portion 184, and the disk portion 186 is continuously coaxial from the small-diameter side end portion of the fitting portion 184. Has been formed. The outer diameter dimension of the disc portion 186 is substantially equal to the minimum outer diameter dimension of the fitting portion 184. Therefore, a sufficiently large gap is formed between the inner peripheral portion of the white rice discharge port 86 and the disc portion 186.

Although not shown in FIG. 8, the shaft hole 160 is provided at the end of the disk portion 186 opposite to the fitting portion 184.
Are formed coaxially, and the bearing portion 158 of the bearing shaft 162 is fitted therein.

This rice polishing apparatus 18 characterized by the above-mentioned structure
At 0, in the state where the valve body 182 is fitted into the white rice discharge port 86 and is closed, there is sufficient space between the minimum outer diameter portion of the fitting portion 184 and the outer peripheral portion of the disk portion 186 and the inner peripheral portion of the white rice discharge port 86. A gap is formed. By forming this gap, even if the particles and the like formed in the rice polishing process are present between the outer peripheral portion of the valve body 182 and the inner peripheral portion of the white rice discharge port 86, they are fitted into the white rice discharge port 86. At times, the above-mentioned gap is inserted between the fitting portion 184 of the valve body 182 and the inner peripheral portion of the white rice discharge port 86,
It just falls. Therefore, the smooth fit of the valve body 182 into the white rice discharge port 86 is not hindered by the particles and the like.

Since the configuration other than the valve body 182 is basically the same as that of the rice polishing apparatus 10 according to the first embodiment, this rice polishing apparatus 180 also exhibits the same operation as the rice polishing apparatus 10. The same effect can be obtained.

[0051]

As described above, according to the present invention, it is possible to prevent trapping of white rice between the valve body and the bottom of the rice-polishing chamber, and to surely close the white rice discharge port to prevent unpolished brown rice from flowing out. In addition to being able to prevent, it is possible to prevent cracking of the white rice caused by sandwiching the white rice between the bottom outer surface of the rice polishing chamber and the valve body. As a result, the quality of milled rice can be improved.

[Brief description of drawings]

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

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

FIG. 3 is an enlarged view of the rice polishing apparatus with the cylindrical valve element in the first rotation position.

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

FIG. 5 is an enlarged view of the rice polishing apparatus with the cylindrical valve element in the third rotation position.

FIG. 6 is a diagram corresponding to FIG. 3 showing a state in which the amount of brown rice in the white polishing cylinder is low and the valve body is closed.

FIG. 7 is a cross-sectional view showing the structure of the main part of the rice polishing apparatus according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a structure of a main part of a rice polishing apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

10 Rice polishing equipment 74 rice mill 80 Rice Polishing Roll 86 White rice outlet 90 pressure valve 110 Tension spring (biasing means) 150 pressure valve 152 valve body 154 Guide shaft 156 Guide hole 180 rice polishing equipment 182 valve body

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B02B 1/00-3/14

Claims (2)

(57) [Claims] 1. A milling room having a milled rice outlet for discharging milled rice on the lower end side, a milled rice roll for milling rice by stirring the brown rice contained in the milling chamber, and a milled rice outlet for milling rice from the outside of the milling chamber. It is fitted in conjunction with a rotatable valve body which closes the rice outlet, and a pressure valve having a biasing means for biasing in a direction to fit the valve body to the polished rice discharge port, further, the white rice Guy opening to the outlet side
Holes are formed in the rice mill roll and inserted into the guide holes.
Guide for guiding the valve body to the inside of the white rice discharge port.
A rice polishing apparatus , wherein a shaft is provided on the valve body . 2. The outer diameter of the valve body is the white rice discharge port.
Only the tip part that fits into the
However, the other part is more than the inner diameter of the white rice discharge port.
Claim 1 Symbol placement of rice apparatus characterized by small.