JPH10146566A - Stone sorting device in rice milling facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stone sorting device in a rice milling facility in which disposal of processing grain is inhibited in the minimum limit while preventing the processing grain from being mixed. SOLUTION: The lower limit level gauge 31 of a brown rice tank 11, which detects that supply of brown rice from the stone sorting device 20 side to the rice milling chamber 13 of a rice milling machine 10 has been reduced, is provided. In the case of detecting reduction of supply of brown rice to a brown rice tank 11, while continuing stone sorting operation, the foreign matter discharge port of the stone sorting device 20 is opened to discharge a foreign matter on the foreign matter discharge place side only for prescribed time. Thereafter, a flow path changeover means is changed over so as to become a flow path on the rice milling machine side and brown rice, which follows the foreign matter and is discharged from the foreign matter discharge port, is supplied to the milling machine. Brown rice remaining on a screen is milled following ordinary rice milling operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice milling machine of the coin type and the like, and more particularly to a stone milling device arranged in front of a rice milling machine.

[0002]

2. Description of the Related Art There is known a coin-type rice milling machine in which rice milling is automatically performed by inserting coins. As shown in FIG. 3, this coin-type rice milling machine has a rice milling machine 10 for milling brown rice into white rice, and a rice milling machine which sorts and removes foreign matter such as stones mixed in brown rice prior to the rice milling operation. There is a device provided with a stone removing device 20 for preventing the rice from being damaged or foreign matter from being mixed in the white rice. In addition, there exists a thing which has a hulling apparatus (not shown) which performs hulling in addition to these facilities.

In this type of coin-type rice milling equipment, when treated grains such as brown rice are put into a loading hopper 1, the brown rice is supplied to a first elevating device 2 by a screw feeder (not shown) or the like, and the first rice is moved to a first elevating device 2. After being transported upward by the elevating device 2, it is passed through a foreign material removing device 3 for removing long objects such as rags and metal debris.
0 to remove foreign matter. And destoning device 2
After the brown rice from 0 is transported upward by the second elevating device 4, it is supplied to the rice mill 10 to perform the rice milling operation.

[0004] As shown in FIG. 4, a destoning device 20 has a screen 2 having a large number of ventilation holes supported on a swingable side with one destoning side A being high and the other grain discharging side B being low.
The screen 21 is swung obliquely up and down by a drive motor (not shown). Further, below the screen 21, a fan casing 23 containing a fan 22 is provided. Processed grains such as brown rice are supplied on the screen 21, and the processed grains are blown up by air and rise slightly, and in this state, the processed grains are further supplied to move to the grain discharge side B. on the other hand,
Since foreign substances such as stones having a specific gravity greater than that of the processed grain do not float, they are gathered on the stone removal side A as the screen 21 is swung and lifted up.

[0005] When the coin-type rice milling equipment is started, the discharge door 24 provided at the foreign matter discharge port 26 of the stone removal side A is opened for a predetermined time (for example, 3 seconds), whereby the stone removal side A is opened. The foreign matter such as the stones stored in the tank is discharged through the discharge passage 25. In this way, the grains and the foreign matter such as stones are screened on the screen 21 to remove the foreign matters from the grain.

[0006] The rice polishing machine 10 is configured, for example, as shown in FIG. A feed roll 14 and a refining roll 15 are disposed inside a refining chamber 13 having an inlet side connected to a refining hopper 11 via a rotary feeder 12 for supplying raw materials. A resistance plate 16 for biasing and limiting in the closing direction is provided.

In the rice polishing process, the feed roll 14 and the whitening roll 15 are driven to rotate by a driving motor 17 as a power source.
Brown rice as the white cereal to be milled, which has been thrown in by its own weight from the milling hopper 11, is pushed toward the resistance plate 16 by the feed roll 14, and is moved between the net 18 inside the milling chamber 13 and the milling roll 15 which is driven to rotate. The brown rice is polished and the polished white rice is discharged from the polished rice outlet 19 while resisting the resistance plate 16. When the urging force of the resistance plate 16 is reduced, the internal pressure of the whitening chamber 13 decreases and the whiteness decreases, and when the urging force of the resistance plate 16 is increased, the internal pressure of the whitening chamber 13 increases. It is designed to increase whiteness.

[0008] As shown in FIG.
A lower limit level meter 31 for detecting the lower limit level of the stored amount of brown rice and an upper limit level meter 32 for detecting the upper limit level
Are provided. Then, after the rice milling equipment is started, when the brown rice is supplied to a level higher than the lower limit level meter 31 position, the rice mill 10 is started, and the brown rice is supplied to a level higher than the lower limit level meter 32 position. When this is done, the screw feeder on the loading side is set at a low rotation or stopped, thereby suppressing supply to the rice milling machine 10 side.

[0009]

The stone removing device 2
If the supply of the processed grain to the screen 21 at 0 is lost, the processed grain does not move to the grain discharge side B and remains on the screen 21. This residue of treated grains is not a problem when the types of treated grains are the same, but when the types of treated grains brought in by the user are not constant, such as coin milling equipment, different types of treated grains are mixed and treated. There was a problem that it was paid out.

In particular, when switching between glutinous rice and sticky rice, it is necessary to avoid mixing of treated grains. Therefore, when switching over between glutinous rice and sticky rice, when the coin milling equipment is activated, the stone removing device 20 In a state where the processed grain is not supplied, the discharge door 24 is opened to swing the screen 21 for a relatively long time (for example, 40 seconds), so that not only the foreign matter but also the processed grain remaining on the screen 21 through the discharge passage 25. Was discharged and discarded. Thus, at the time of switching between glutinous rice and sticky rice, the treated grains before switching are discarded, and there is also a problem that the amount of milled rice is reduced accordingly.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a demining device for a rice milling facility that can minimize the disposal of treated grains while preventing the mixing of treated grains. Is what you do.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a destoning apparatus for supplying brown rice to a swingably supported screen to selectively separate foreign substances such as stones and brown rice from specific gravity. In a rice milling machine that performs whitening while supplying brown rice from which foreign matter has been removed by a stone removing device to a rice milling room, and a control device that controls the stone removing device and the rice milling machine, the rice milling device is used to A flow path that is provided with a detection unit that detects that the supply of brown rice to the rice milling room has decreased, and that switches what is discharged from the foreign matter discharge port of the destoner between the waste flow path and the rice mill flow path. Switching means is provided, and when the control means detects that the supply of brown rice to the brown rice tank is low by the detecting means, the foreign matter discharge port of the stone removing device is opened while continuing the stone removing operation of the stone removing device. Predetermined foreign matter discharged from the lever foreign matter outlet For a period of time, the foreign substance discharge port is discharged to the foreign substance discharge location side, and thereafter, in a state where the foreign substance discharge port of the stone removing device is opened, the flow path following the foreign substance discharge port after the predetermined time has elapsed becomes the rice milling machine side flow path. In this way, the flow path switching means is switched so that brown rice discharged from the foreign matter discharge port following the foreign matter is supplied to the rice milling machine.

Here, as the detecting means, a lower limit level meter provided in a brown rice tank which collects brown rice from which foreign matters have been removed by a stone removal device and supplies the brown rice to the milling room side is suitable. According to this configuration, the supply of brown rice to the brown rice tank is reduced when the rice polishing process is near to end, and this is detected by the detection means, and the foreign matter discharge port of the stone removal device is opened, and stones and the like are opened from the foreign matter discharge port. Brown rice containing the foreign matter is discharged to the foreign matter discharge point side. Thereafter, in a state where the foreign substance discharge port of the stone removing device is subsequently opened, the flow path following the foreign substance discharge port is switched so as to be the rice mill-side flow path after a predetermined time has elapsed, and thus the liquid remains on the screen. Following the foreign matter, the brown rice is discharged from the foreign matter discharge port and sent to the rice mill through the rice mill-side flow path. As a result, the brown rice remaining on the screen is also polished following the normal rice milling operation, and it is possible to prevent almost all the brown rice except the brown rice mixed with the foreign matter from being polished, while preventing the processing grain from being mixed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The only difference from the conventional rice milling equipment is the discharge structure from the destoning device 20 and its control operation. Therefore, the same reference numerals are given to the same portions, and the description thereof will be omitted.

As shown in FIG. 1, in this rice polishing facility, a lower limit level meter 31 provided in the brown rice tank 11
It is also used as a detecting means for detecting that the supply of brown rice from the destoner 20 to the rice mill 13 of the rice mill 10 is reduced. Further, a switching valve 33 as a flow path switching means is provided at a downstream portion of the discharge passage 25 following the foreign matter discharge port 26 of the stone removing device 20, and the switching valve 33 has a posture shown by a solid line in FIG. It is rotatable between the postures indicated by. The switching valve 33 connects the flow from the discharge passage 25 to the discard-side flow path 34 when it is in the position shown by the solid line, and in the position shown by the phantom line, the rice-milling machine-side flow path following the rice polishing machine 10. 35. Each device including the rice milling machine 10 and the destoner 20 is controlled by a control unit (not shown), and the control unit has a timer unit so that time can be managed.

The control means of the rice mill performs the following control operation. When a coin is inserted into the coin milling equipment and a start button (not shown) is pressed, the screw feeder, the first elevating device 2, the destoning device 20 and the second elevating device 4 are driven, and brown rice is stored in the brown rice tank 11. Supplied sequentially. Then, the brown rice in the brown rice tank 11 is the lower limit level total 3
When it reaches the height of 1 and turns on, step #
The process proceeds from step 1 to step # 2, where the rice mill 10 is started to start the rice milling process. When the rice polishing process is being performed, it is checked in step # 3 whether the coin charge is sufficient. If the coin runs out, the process proceeds to step # 3A, where the brown rice in the brown rice tank 11 is removed. Is higher than the lower limit level meter 31 and is in the ON state, the process proceeds to step # 4, and the end operation of each device is performed.

If it is confirmed in step # 3 that the coin is not out of coins, the process proceeds to step # 5 to check whether the brown rice in the brown rice tank 11 is lower than the height of the lower limit level meter 31 and is in the OFF state. Is determined. That is, when the rice milling process approaches the end time, the stone removing device 20
The supply of brown rice to the brown rice tank 11 and the supply of brown rice to the brown rice tank 11 are also eliminated, so that the amount of brown rice in the brown rice tank 11 decreases. The amount of brown rice is reduced to a level lower than the height of the lower limit level meter 31 of the brown rice tank 11, and the rice is turned off. With the swinging of 21 continued, the discharge door 24 of the stone removing device 20 is turned obliquely upward to open the foreign matter discharge port 26, and the timer is started and timed (step # 6). Also, in step # 3, even if the coin is out and the brown rice in the brown rice tank 11 is less than the height of the lower limit level meter 31 and is in the OFF state in step # 3A, the rice polishing process is approaching the end time. In step # 6, the foreign matter discharge port 26 is opened and the timer section is started to count time. At this time, the switching valve 33 is set in advance to the posture shown by the solid line in FIG. Therefore, the stone removal device 2
The foreign matter such as the stone brought to the stone removal side A of 0 is discharged together with the brown rice from the foreign matter discharge port 26 through the discharge passage 25 to the disposal side flow path 34.

Thereafter, when a predetermined time (for example, 3 seconds) elapses after opening the foreign matter discharge port 26, the process proceeds from step # 7 to step # 8, and the switching valve 33 is switched to the position indicated by the phantom line in FIG. As a result, the brown rice remaining on the screen 21 is discharged from the foreign matter discharge port 26 through the discharge passage 25 to the rice mill side channel 35, and then discharged into the brown rice tank 11 by the second lifting device 4. Until the elapsed time in the timer section reaches a predetermined time (for example, 40 seconds), the brown rice remaining on the screen 21 is discharged into the brown rice tank 11 via the rice mill-side channel 35. The time at this time is set so that the brown rice remaining on the screen 21 is completely discharged.

When a predetermined time has elapsed in the timer section in step # 9, the process proceeds to step # 10, in which the foreign matter discharge port 26 is closed and the switching valve 33 is switched to the waste side flow path 34, so that the next rice polishing is performed. Prepared for processing,
In addition, an end operation is performed in each device (step # 4).

As a result, when the end of the rice polishing process approaches,
The brown rice remaining on the screen 21 is also discharged into the brown rice tank 11 and after the rice milling is continuously performed, the rice milling operation is terminated, so that it is possible not only to prevent mixing with the next processed grain, but also to use glutinous rice. Almost all brown rice can always be polished even when switching to rice, etc., and it is possible to prevent such a problem that the remaining rice is discarded when the type of processed cereal is switched as in the past.

In this embodiment, the lower limit level meter 31 of the brown rice tank 11 is also used as a detecting means for detecting that the supply of brown rice from the destoner 20 to the milling machine 10 is reduced. Because of this, equipment costs can be reduced accordingly. However, it is not limited to this,
Separate detection means may be provided at an optimum level as the foreign matter discharge time in the brown rice tank 11, and further, a detection means for detecting the discharge amount may be provided at the grain discharge side outlet of the stone removal device 20 instead of these. Is also good.

Further, for example, it is conceivable to provide a detection means for detecting the remaining amount in the input hopper 1, but there is a case where the processed cereal is dividedly input into the input hopper 1; Is still on the way,
When the remaining amount of the charging hopper 1 becomes low, the discharging operation of the foreign matter may be started.
There is a possibility that the treated grain that has been thrown into the tank may be discarded together with the foreign matter discharging operation. That is, as described above, the brown rice tank 11
Is provided, the brown rice remains in the brown rice tank 11 for a while, even if the treated grain is divided into small portions and charged into the charging hopper 1, so that there is little possibility of erroneous determination as described above. There are advantages.

[0023]

As described above, according to the present invention, there is provided a detecting means including a lower limit level meter of a brown rice tank for detecting that the supply of brown rice from the destoner to the rice mill of the rice mill is reduced. If the detection means detects that the supply of brown rice to the brown rice tank is low, the debris removal device opens the foreign matter discharge port of the destoner while continuing to remove the debris and discharges from this foreign matter discharge port. Foreign matter is discharged to the foreign matter discharge location side for a predetermined time, and then, with the foreign matter discharge port of the stone removing device being opened, when the predetermined time has elapsed, the flow path following the foreign matter discharge port is located on the milling machine side. By switching the flow path switching means so as to form a flow path and supplying the brown rice discharged from the foreign substance discharge port following the foreign substance to the rice milling machine, the brown rice remaining on the screen can be continued to the normal rice polishing operation. Milled rice, processed grain It is possible to prevent the entry,
Almost all brown rice except brown rice mixed with foreign matter can be milled, including when the type of processed grain is switched, and as a result, the reliability of the milling equipment is improved, and The percentage also increases.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a rice polishing facility according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control operation related to a foreign matter discharging operation of the rice milling equipment.

FIG. 3 is a diagram schematically showing a conventional rice milling facility.

FIG. 4 is a perspective view of the stone removing device.

FIG. 5 is a sectional view of a rice mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rice polishing machine 11 Brown rice tank 13 Rice polishing room 20 Stone removal device 21 Screen 24 Discharge door 25 Discharge passage 26 Foreign matter discharge port 33 Switching valve 34 Discard side channel 35 Rice mill side channel

Claims (2)

[Claims] 1. A stone removal device for supplying brown rice to a swingably supported screen to selectively separate foreign matter such as stones from brown rice, and brown rice from which foreign matter has been removed by the stone removal device is supplied to a rice milling room. In a rice milling machine equipped with a rice milling machine that performs whitening while controlling the stone milling device and the rice milling machine, it detects that the supply of brown rice from the stone milling device to the milling room of the rice milling machine has decreased. A detecting means provided with flow path switching means for switching a substance discharged from the foreign matter discharge port of the stone removing device between a waste side flow path and a rice milling machine side flow path; When it is detected that the supply of brown rice has decreased, the foreign matter discharge port of the stone remover is opened while continuing the stone removal operation of the stone remover, and foreign matter discharged from this foreign matter discharge port is removed for a predetermined time. Discharge to the discharge point side, and then continue With the foreign matter discharge port of the stone removing device opened, the flow path switching means is switched so that the flow path following the foreign matter discharge port becomes the rice mill-side flow path when the predetermined time has elapsed. Milling equipment for rice milling equipment that controls brown rice discharged from the foreign matter outlet to be supplied to the rice mill. 2. The quarrying device of the rice milling equipment according to claim 1, wherein the detecting means is a lower limit level meter provided in a brown rice tank for storing brown rice from which foreign matter has been removed by the stone milling device and supplying the brown rice to the rice milling room side. .