JPH0785778B2 - Whitening device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a whitening device.

[Problems to be Solved by Prior Art and Invention] Raw brown rice is sequentially supplied to a whitening chamber in which whitening rolls are mounted on a rotating shaft, and a strong pressure is generated between the walls of the chamber and between the rotating rolls or between the internal brown rice to generate surface bran. In order to make the layer peel off,
With respect to the whitening action, the above pressure for proper bran layer peeling cannot be obtained unless a predetermined amount of grains is constantly supplied into the whitening chamber.

Therefore, when the supply of brown rice gradually decreases at the end of work, etc., it remains in an unpolished state, and in the case of the vertical rotation type whitening roll to take out the milled rice from the lower side, the untreated portion is discharged from the lower side. , There is a risk that it may be mixed into the polished rice.

Further, there is a possibility that the untreated rice may remain in the whitening chamber having a horizontal axis type whitening roll, and the untreated rice may be first taken out and mixed into the finished white polished rice in the whitening operation in the next step. .

[Means for Solving Problems] A supply tank 5 for storing raw brown rice and a reduced rice supply tank 15 for storing the milled rice that has passed through the whitening device 1 are provided.
Both supply tanks 5 and 15 are provided so as to be able to communicate with the whitening device 1, and when the raw brown rice in the supply tank 5 is less than a predetermined amount, the whitened rice that has been stored in advance in the reduced rice supply tank 15 is supplied to the whitening device 1. The structure of the whitening device is the same as the above.

[Operation of the Invention] The raw brown rice is supplied to the supply tank 5, and the whitening-processed rice that has been subjected to the whitening operation by being supplied from the supply tank 5 to the whitening device is supplied to and stored in the reducing supply tank 15. When the amount of raw brown rice stored in the supply tank 5 becomes less than a predetermined amount, the whitening-processed rice stored in advance in the reduction supply tank 15 is supplied to the whitening device 1. The whitening-treated rice that has been whitening-processed by the whitening device is collected.

Even when the amount of raw brown rice in the supply tank 5 becomes low near the end of the whitening work, the whitening-treated rice stored in advance is supplied to the whitening device 1, so that the fluctuation of the pressure required for peeling bran from the brown rice is small and the whitening is improved. And increase product value.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

1 is a machine frame of a whitening device, in which a whitening roll 2 which rotates around a vertical axis is provided, and a whitening chamber 4 is provided on the outer periphery thereof, in which bran screens 3 are provided at appropriate intervals. This is a well-known structure in which the raw brown rice from the upper supply tank 5 is received in the whitening chamber 4 to perform whitening processing. Reference numeral 6 denotes a passage through which the bran that has passed through the bran-removing screen 3 should be discharged by the action of a suction device (not shown).

Reference numeral 7 denotes an outlet opening at the bottom of the whitening chamber 4, through which the resistance plate 8 is seen. The resistance plate 8 is configured to be rotatable around a spindle, and the weight 9 at the end portion is used to remove the whiteness of the whitening chamber 4. It is configured so that a predetermined pressure can be applied to the brown rice inside.

Below the outlet 7, the upper end open part of the discharge tube 10 communicating with the outside of the machine is seen, and in the finishing tank 11 which connects the finished polished rice flowing downward beyond the resistance plate 8 to the outside of the machine. It is a configuration to take out.

A return pipe 13 is provided in the middle of the discharge pipe 10 through an opening / closing valve 12, and the lower end of the return pipe 13 is connected to the return thrower 14.

Reference numeral 15 denotes a reduced rice supply tank provided at the upper end portion of the reduction thrower 14 and arranged in parallel with the supply tank 5.

Below the supply tank 5 and the reduced rice supply tank 15,
A guide tube 16 communicating with the polishing chamber 4 is provided, and tanks 5 and 15 are simultaneously opened or closed, or an opening / closing shutter 17 is provided so that only the supply tank 5 can be opened.

The open / close shutter 17 is configured to open / close by a control motor 18 capable of forward / reverse rotation, and the open / close valve 12 is configured to open / close by a solenoid 19 operation.The control motor 18 and the solenoid 19 are sensors, timers, etc. shown below. The sequence is controlled by the operation. That is, the built-in limit switch is turned on by receiving a predetermined pressure at a predetermined position on the lower side of the supply tank 5.
A pressure sensor 20 that can detect the presence or absence of grains is provided, and a limit switch 21 and a reduced rice supply tank 15 that are turned on in the "open" state on the supply tank 5 side are also turned on in the vicinity of the opening / closing shutter 17 A limit switch 22 is provided, the control motor 18 starts forward rotation based on the ON operation of the sensor 20, and stops when the limit switch 21 is turned on by opening the opening / closing shutter 17 which is initially in the “closed” state. Further, when the opening / closing shutter 17 is in the half-opened state, the control motor 18 rotates forward based on the OFF operation of the sensor 20, and stops when the shutter 17 contacts the limit switch 22 and turns ON.

On the contrary, the control motor 18 operates in the reverse rotation when the fixed time (timer T ₁ set time for discharging all the stored rice in the reduced rice supply tank 15) has passed after the limit switch 22 is turned ON, and the opening / closing shutter is operated.
Return 17 to the closed state.

The reduced rice supply tank 15, the opening / closing shutter 17, and the sensor 20 described above.
It becomes an auxiliary supply mechanism that supplies the polished rice reduced by the above and so on before the completion of the supply of the raw brown rice.

The solenoid 19 is excited when the sensor 20 is turned on, and the open / close valve 12 is switched to the communication side of the reduction gutter 13 to store the raw rice brown rice in the whitening room (timer T ₂ set time) and a fixed amount of the reduced rice supply tank 15. Time (timer T ₃ setting time)
The communication side is held for a period of time that is added, and thereafter, the opening / closing valve 12 is demagnetized and the on-off valve 12 is closed.

In addition, 23 is a grain elevator that lifts the raw brown rice from the stake hopper 24 toward the supply tank 5, 25 is a drive motor for the same, 26 is a motor for driving the reduction thrower 14, 27 is a milled rice. The bag is suspended from the bottom of the finishing tank 11.

The operation of the above example will be described.

When the raw brown rice is put into the stake hopper 24, it is stored in the supply tank 5 via the grain elevator 23. When the sensor 20 is turned on, the opening / closing shutter 17 is opened and only the supply tank 5 side is opened (FIG. 3 (b)). The raw brown rice is sequentially fed into the brewing chamber 4 through the guide tube 16, and in the brewing chamber 4, a predetermined amount of brown rice is apparently stagnant while receiving the resistance action of the resistance plate 8, and the rotation of the brewing roll 2 rotates the brown rice between the brown rice. A strong pressure is generated between the milling roll 2 and the bran screen 3 to peel off the bran layer on the surface of the brown rice. In this way, the polished rice is guided to the discharge pipe 10 from the lower outlet 7 and flows down. By the way, the on-off valve 12 on the way is a sensor
Since the solenoid 19 is excited based on the operation of 20 and the reducing cylinder 13 side is open, the rice that has been whitened by the timer setting time (T ₂ + T ₃ ) is guided down to the reducing thrower 14 side, and the reduced rice supply tank 15 It is transferred inside (Fig. 3 (c)).

When the above timer setting time (T ₂ + T ₃ ) has elapsed, the solenoid 19 is demagnetized and the on-off valve 12 is restored. For this reason, the milled rice that will continue to be milled is discharged from the drain 10 to the finishing tank.
All the information will be collected within 11 days. The tank 11 is appropriately accommodated in a bag 27 or the like.

As described above, the raw brown rice is sequentially supplied into the supply tank 5 and the whitening work can be continued. However, when the end of the operation is reached, the storage amount of the supply tank 5 is gradually decreased and the sensor 20
Turns off when it no longer senses brown rice pressure and opens / closes shutter 17
Opens the reduced rice supply tank 15 (Fig. 3 (d)). In this way, the polished rice that has been reduced and stored as described above is continuously supplied into the polishing chamber 4 after the raw brown rice from the supply tank 5 side is cut off.

Therefore, at least as long as the raw brown rice passes through the whitening chamber 4, the subsequent whitened rice is present, the grain amount in the whitening chamber 4 is secured in a predetermined amount, and the pressure for peeling the bran is secured. The last one discharged in the polishing chamber 4 is
It has already been subjected to whitening treatment and no unprocessed material remains.

In this embodiment, the whitening roll 2 is rotated around the axis of the vertical axis, the whitening chamber 4 is formed vertically, and the brown rice is whitened while flowing down from the upper part. Although some unpolished rice remains, it is advantageous that it can be milled again because it is returned to the reduced rice supply tank 15 as described above.

FIG. 5 shows the operating state of the opening / closing shutter of another embodiment. At the beginning of the work, the supply tank and the reduced rice supply tank are opened at the same time, and the milled rice immediately after the start is circulated to the milling room, and when it passes through the milling room. Still, it is possible to eliminate the unpolished white matter, and then to close the reduced rice supply tank side with the shutter, store only the whitening-treated one, and use it for the whitening treatment just before the end.

In the present embodiment, the reduction of the raw brown rice to be supplied to the brewing chamber 4 is based on the detection result of the sensor 20 provided in the supply tank 5, but the configuration may be such that the reduction of the load of the brewing roll 2 is detected.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partial side view of an entire side view, FIG. 2 is a partial sectional view of the same, and FIGS. 4, FIG. 4 is a flow chart, and FIG. 5 is an operation explanatory view of another embodiment. 1 is a whitening device, 5 is a supply tank, and 15 is a reduced rice supply tank.

Claims (1)

[Claims] 1. A supply tank 5 for storing raw brown rice and a reduced rice supply tank for storing whitening-treated rice that has passed through a whitening device 1.
15 is provided so that both supply tanks 5 and 15 can communicate with the whitening device 1, and when the raw brown rice in the supply tank 5 is less than a predetermined amount, the whitened rice that has been stored in advance in the reduced rice supply tank 15 A whitening device configured to supply the whitening device 1.