JPH04176371A - Stone sorting system and ejecting device thereof - Google Patents

Abstract

PURPOSE:To enable completely automatic operation of sorting treatment at high precision by carrying out the material which is discharged from a normally- opened stone discharge port of a sorting device or flown out from the sorting device and falls on the bottom of a cabinet and sending this material to a resorting device. CONSTITUTION:A stone sorting system is constituted of the blow vibration type sorting devices 3a, 3b which are provided in a cabinet 20 and have normally-opened stone discharge ports 19, an ejecting device 5 provided to the bottom of the cabinet 20 and a resorting device 11 for recovering grains from the material sent out by the ejecting device 5. Supplied grains of a raw material are sorted and treated by the sorting devices 3a, 3b. The material described below is carried out to the outside of the cabinet 20 by the ejecting device 5 and sent to a resorting device 11 to recover grains admixed thereinto. The material is discharged from the normally-opened stone discharge ports 19 of the sorting devices or flown out from these sorting devices and falls on the bottom of the cabinet 20. As a result, loss of grains at a time of work is prevented and sorting treatment at high precision is performed by automatic operation.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a stone removal grain sorting system used in grain mills to remove foreign matter such as pebbles contained in grain, and its use. Regarding an unloading device.

<Prior Art> As a result of the invention by the present inventor, de-stoning grain sorting machines have come to be widely used throughout the world, and are now of the standard type. . The structure of this conventional grain sorting machine is to vibrate diagonally up and down a sorting plate installed at a slight inclination, and blow air from a number of small holes on the plate surface to separate raw grains fed onto the sorting plate. In this method, grains and pebbles are separated using the difference in specific gravity.

In addition, in Japanese Patent Publication No. 58-5715, the height of the side wall of the sorting plate is made slightly lower than usual, so that the grains can jump over this side wall by the blast of air from the plate surface, but grains like pebbles are By preventing heavy foreign objects from jumping over this side wall, we have proposed a stone-removed grain sorting machine that does not leave any grains on the sorting plate after the sorting process is complete, and that allows only pebbles to be sorted with high purity. are doing.

<Problems to be Solved by the Invention> However, in the case of the above-mentioned conventional grain sorting machine, there is a drawback that there is a large loss of grain during the grain sorting operation.

In this grain sorting machine, grains fly out immediately after the material to be sorted is fed onto the sorting plate at the start of work and when the amount of grain on the sorting plate becomes small at the end of work. That is, when the amount of grain on the sorting plate is small, the grains are hit by a strong blowing force and jump, and fly out over the side wall of the sorting plate.

This amount of protrusion is quite large, and this results in a loss.

Furthermore, in conventional grain sorting machines, there is a problem in that a considerable amount of material mixed with stones remains on the sorting plate at the end of the sorting operation. If this residue is disposed of, many grains contained in the residue will be lost, and furthermore, conventional grain sorting machines cannot operate automatically. In this grain sorting machine, the stone discharge port provided on the sloped upper part of the sorting plate is closed during operation 17, and when a certain amount of stones remain, the stone discharge port is opened and removed. Accompaniment is essential. If the stone contamination rate is approximately constant, it is possible to automatically open and close the stone discharge port using a timer control, etc. However, since the contamination rate of stones in grain varies greatly from one individual to another, this timer is not suitable. Therefore, it is not possible to adopt a one-sided system.

Further, although the method of Japanese Patent Publication No. 58-5715 mentioned above can prevent residue and perform high-precision sorting, it is problematic in terms of cost when used for mass processing.

In view of the above points, the present invention is a de-stoning grain sorting system that does not cause grain loss during operation, can perform highly accurate sorting processing in completely automatic operation, and is also suitable for large-scale processing. , and a useful removal device for use with this system.

<Means for Solving the Problems> The technical means of the stone removal grain sorting system of the present invention includes a blast/vibration type sorting device that is installed in a cabinet and has a stone discharge port that is always open; It consists of an unloading device installed at the bottom of the cabinet and a re-selection device that collects grains from the grains sent out by this unloading device. Stones that are discharged from the stone discharge port or that fly out of the sorting device and fall to the bottom of the cabinet are carried out of the cabinet by the unloading device and sent to the re-selection device.
The reason is that the grains mixed in it are collected.

In addition, it has a distributor that divides the raw material grains that are continuously sent into multiple streams, and multiple sorting devices are installed in the cabinet, and the divided raw material grains are sent to each sorting device. It is also possible to perform a sorting process.

Furthermore, the cabinet is equipped with multiple stages of sorting devices, and the waste from the stone outlet of one sorter is fed into another sorter, and the waste is fed from the stone outlet of the final sorter. The effluent may be sent to a reselection device.

In addition, in the carrying out device, a groove-shaped carrying out path is formed at the bottom of the sorting device cabinet, and is horizontal or gently inclined in the longitudinal direction and has an open top surface, and this carrying out path is provided with a large number of blowholes. Moreover, this blowhole is open toward the carrying-out direction, and the air flowing out of the cabinet together with the objects to be carried out can be collected and sent to the blowhole again.

Effect> In the stone removal grain sorting system of the present invention, raw material grains that are continuously sent are supplied to a sorting device. In the sorting device, a sorting action is performed using a difference in specific gravity, etc., using jet air and vibration. The grains thus sorted are taken out as a selected product. In the sorting device, six discharge ports are always open. Therefore,
6. Anything that comes to the discharge port will be discharged. Of course, this waste contains pebbles and the like, but the contamination rate is low and most of it is grains. In addition, since the 6 discharge ports are always open and are immediately discharged, there is no accumulation of stone near the stone discharge port for a long time.

At the bottom of the cabinet, in addition to the materials discharged from the six discharge ports of the sorting device, light dust blown up from the sorting device by the blast of air and grains flying out of the sorting device fall and collect. This fallen object is carried out by a carrying out device,
It is further sent to the re-election device. The re-selection device sorts and collects the grains contained in the fallen material that has been carried away. Furthermore, since the sorting device is housed within the cabinet, dust such as bran powder and straw dust thrown up by the blast of air will not be scattered outside and will not harm the environment in the workplace. Furthermore, since the 6 discharge ports of the sorting device are always open, a considerable amount of unsorted grain is left on the sorting plate immediately after the feed of raw grain onto the sorting plate is finished and the sorting operation is completed. However, if the operation continues for a while, all the remaining materials will fly out from the sorting plate or come out from the 6 discharge port.

Therefore, no material to be sorted remains on the sorting plate at the end of the work.

In the case where a plurality of sorting devices are installed in the cabinet, the continuously fed raw grain is first divided into a plurality of equal streams by a distributor. The separated raw material grains are then sent to each sorting device, where they are sorted.

In the case where the sorting device is provided in multiple stages, the discharged material from the six discharge ports of the first stage sorting device is sent to the second stage sorting device and subjected to the sorting action again. Since the stone contamination rate of the discharged material from the 6-discharge port is proportional to the stone contamination rate of the original material to be sorted, when a multi-stage process is performed, the stone contamination rate becomes concentrated and increases with each stage. Then, the waste from the final stage with a high stone contamination rate is sent to the reselection device.

In addition, in the case where a blower type is used as a carry-out device, the air is blown out diagonally from the bottom of the conveyance path, so the falling objects that come here are affected by the floating blades and transport force caused by this blower. It is sent to the loading port. The conveyed object and air flow out of the outlet at the same time, but only the air is separated and collected, sent to the blowhole again, and recycled.

<Example> An example of the stone removal grain sorting system of the present invention will be described with reference to the drawings. Since FIG. 1 shows a flowchart of the sorting processing operation of the system of this embodiment, the outline of this system will first be explained based on this flowchart.

Raw material grain A mixed with pebbles and the like to be sorted is stored in the raw material tank 1. During work, the outlet at the lower end of the tank 1 is opened and the raw grain A is sent to the distributor 2.

The distributor 2 divides the raw material grains flowing down into a plurality of branch streams. The distributor 2 has a plurality of outlets (six in the illustrated example), and the raw material grain B flowing out from these outlets is sent to each sorting device 3, respectively. Sorting equipment R3 is a set of two machines, upper and lower.
They are arranged in stages, and the required number of sets are provided in parallel. That is, in the illustrated example, three sets are provided in parallel on the left and right. The mechanism of the sorting device 3 is almost the same as the conventional one, and is of a type that uses vibrations and blasts of air from the plate surface to sort grains from pebbles, etc., using differences in specific gravity. The selected grains C sorted by each sorting device 3 are collected and sent to a tank 4. In this sorting device 3, the six discharge ports are always open, unlike conventional ones. Therefore, even stone particles with light specific gravity easily move to the upper part of the slope, and those that move to the upper part of the slope of the sorting plate sequentially flow out from the stone discharge port. This discharged material naturally contains pebbles, but most of it is grain. The discharged material from the six discharge ports of the upper sorting device 3a is supplied onto the selection plate of the lower sorting device 3b. This waste,
The supply position is closer to the stone discharge port than the raw material grain supply position. In the lower sorting device 3b, raw grains and waste D1 are separated.
are selected together. The stone discharge port of the lower sorting device 3b is also always open, and stones that have moved to the upper part of the slope are sequentially discharged. However, the lower stone outlet is narrower than the upper one, and the amount of stone discharged is smaller. On the other hand, the contamination rate of stones is high because they are more concentrated. The discharged material from the lower sorting device 3b falls directly to the bottom of the cabinet.

A blower-type carrying-out device 5 is provided at the bottom of the cabinet, and the objects E that have fallen to the bottom are sent to a tank 6 by pneumatic conveyance. The fallen objects E include, in addition to the above-mentioned carried-out objects, grains that have jumped out of the sorting device 3 and fallen, and debris that has been blown up from the sorting board by the blast and scattered and fallen. Fallen objects E and air flow into the tank 6 at the same time, but only the air is collected from the tank's exhaust port and sent to the cyclone 7. The cyclone 7 separates dust contained in the air, and the blower 8 sucks and discharges the dust. The purified air passes through the blower 9 and is sent to the discharge device 5 again. That is, the air is recycled.

Further, the fallen objects E remaining in the tank 6 are sent to the upper reselection device 11 by a packet elevator 10. This reselection device 11 uses the grain sorting device disclosed in Japanese Patent Publication No. 58-5715. In this reselection device 11, grains F and foreign substances G such as pebbles are separated with high purity. A switching device 24 is provided at the grain outlet of the reselection device 11. Therefore, in addition to being able to directly send the collected grains to the grain milling tank 4 and take them out, it is also possible to switch the feeding direction to the sorting device 3a so that the collected grains are sorted in a circular manner. .

Next, the specific structure of the stone removal grain sorting system of the present invention will be explained with reference to FIGS. 2 and 3. The sorting device 3 is housed in a cabinet 20, and the air from the blast is circulated within the cabinet 20. Therefore, the dust blown up by the blast of air will not be scattered outside. Further, the bottom of the cabinet 20 is a V-shaped inclined surface 21, and the unloading device 5 is provided at the lowest part thereof.

For this reason, the objects E that have fallen to the bottom of the cabinet 20 gather toward the carrying-out device 5 along the inclined surface 21. The carrying out device 5 is a blower type, the structure of the carrying out path is a groove shape with an open top, and the bottom face 12 is horizontal or gently inclined, and
It has a large number of blowholes 13. This blowhole 13 is formed by making a cut in the bottom plate and pushing the front and back of the cut wider in the vertical direction. Therefore, the blowhole is opened laterally, and the air ejected from the blowhole is oriented in an oblique direction, so that the fallen objects E on the carry-out path can be transferred toward the exit 14. An air chamber 15 is formed below the bottom surface 12 of the discharge path, into which air is sent from the blower 9.

The distributor 2 is provided at the top of the cabinet 20,
The separated raw material grains B are sent to each sorting device 3 by an inclined chute. Further, a re-selection device 11 is provided above the cabinet 20, and the stones G that have been sorted and separated here are discharged outside the machine, and the grains F are sent to one of the upper sorting devices 3a. Moreover, it is also possible to switch the discharge direction of the grains F and send them toward the tank 4.

As shown in FIG. 3, the windmill shaft 16 of the upper and lower sorting devices 3
The vibrating shaft 17 and the vibrating shaft 17 are simultaneously rotated by belt transmission from a motor 18. Further, since the windmill shaft 16 and the vibration shaft 17 of the sorting device 3 are connected and integrated in the upper and lower stages, all the sorting devices 3 can be operated in conjunction at the same time. Further, the stone discharge port 19 of the sorting device 3 is always open, and the waste D1 falling from the stone discharge port 19 in the upper stage falls onto the sorting plate in the lower stage. As described above, this falling position is set to be closer to the stone discharge port than the position of the raw grain. In addition, the waste that has fallen from the lower stone outlet 19 is located on the sloped surface 2 at the bottom of the cabinet 20.
Fall on 1. The opening amount of the lower stone outlet is narrower than that of the upper stone outlet, and the amount of D is smaller. However, the amount of stones mixed in is higher. The fine grains that have been sorted and separated by the sorting device 3 flow out of the casing 20 from the discharge port 22 via the guide path 23 and enter the fine grain tank 4.

In the present invention, the number of sorting devices to be used is arbitrary and can be increased or decreased depending on the required throughput, and it is also possible to have three or more stages in addition to the two upper and lower stages. Furthermore, the specific structure of each device and its mounting position are not limited to the embodiments.

<Effects of the Invention> In the stone removal grain sorting system of the present invention, the stone discharge port of the sorting device is kept open at all times, and more stones are discharged than usual, so the sorting accuracy is improved and stones are not mixed in the selected grains. There will be nothing left to do. Furthermore, since the material that has fallen to the bottom of the cabinet of the sorting device is taken out by the unloading device and sent to the re-selection device, and the grains contained in the fallen material are recovered, there is no loss of grains and it is economical.

Furthermore, since the stone discharge port of the sorting device is always open, no material to be sorted remains on the sorting plate at the end of the work, and as a result, there is no need for cleaning at the end of the work. It will not mix with the items to be sorted during the next operation. In addition, the present invention is not affected by fluctuations in the contamination rate of pebbles, etc. contained in the raw grain, and can reliably separate and sort rice from pebbles, etc.
Fully automated driving is possible.

In the apparatus using a plurality of sorting apparatuses according to the second aspect, a large amount of grain sorting can be carried out efficiently.

In the case where the sorting device according to claim 3 is provided in multiple stages, the rate of stone contamination in the discharged material from the stone discharge port increases with each stage;
Since the contamination rate of grains in the final discharged material is low, it is easy to re-sort and collect the grains from now on.

In the unloading device according to claim 4, items that have fallen to the bottom of the cabinet can be sent out smoothly with a small force without leaving any residue, and since the air is reused in a circulating manner, the work environment is not polluted. There's nothing to do.

[Brief explanation of the drawing]

The drawings show an embodiment of the stone removal and sorting system of the present invention, FIG. 1 is a 70-chart showing an overview of the system, FIG. 2 is a vertical cross-sectional front view of the installation location of the sorting device, and FIG. 3 is a vertical cross-sectional side view thereof. It is a diagram. DESCRIPTION OF SYMBOLS 1... Raw material tank, 2... Distributor, 3... Sorting device, 4... Grain polishing tank, 5... Carrying out device, 6...
Tank, 7... Cyclone, 8, 9... Blower 1
DESCRIPTION OF SYMBOLS 10... Packet elevator-111... Re-selection device, 12... Bottom surface of unloading path, 13... Blower hole, 14...
・Exit, 15... Air chamber, 16... Wind turbine shaft, 17.
・・Vibration shaft, 18・・Motor, 19・・Stone discharge port,
20... Cabinet, 21... Inclined surface, 24...
・Switching device. Patent applicant: Toyo Rice Mill Co., Ltd. Agent: Bamboo
1) Akihiro Figure 1

Claims (1)

[Claims] 1. A blast/vibration type sorting device installed in the cabinet and with a stone discharge port always open, an unloading device installed at the bottom of the cabinet, and the unloading device. It consists of a re-selection device that collects grain from the grains that are sent out, and the supplied raw material grains are sorted by the sorting device and then discharged from the always-open stone outlet of the sorting device or ejected from the sorting device. In this stone removal grain sorting system, grains that fall to the bottom of the cabinet are carried out of the cabinet by a carry-out device and sent to a re-selection device, where the grains mixed therein are recovered. 2. It has a distributor that divides the raw material grains that are continuously sent into multiple streams, and multiple sorting devices are installed in the cabinet, and the divided raw material grains are sent to each sorting device. The stone removal grain sorting system according to claim 1, wherein the grain sorting system is adapted to be subjected to a sorting process. 3. There are multiple stages of sorting devices in the cabinet, and the waste from the stone outlet of one sorter is fed into another sorter, and the waste is fed from the stone outlet of the final sorter. 3. The destoning grain sorting system of claim 2, wherein the waste is sent to a reselection device. 4. At the bottom of the sorting equipment cabinet, there is formed a groove-shaped conveyance path that is horizontal or gently sloped in the longitudinal direction and has an open top. A carry-out device in which the hole is open toward the carry-out direction, and the air that flows out of the cabinet along with the objects to be carried is collected and sent to the blowhole again.