JPS63221874A - Destoning selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a stone removal sorter for removing pebbles mixed in grains of rice, wheat, etc.

[Conventional technology]

Conventionally, in the stone removal process of rice grains in rice milling factories, etc., multiple large stone removal sorters are installed in parallel, and rice grains containing stones (hereinafter referred to as mixed grains) are discharged from each of the stone removal sorters. 〉 is further conveyed to a small stone removing sorter for careful selection, and the rice grains discharged from the refined product port of this small stone removing sorter are returned to one of the large stone removing sorters for re-sorting. This ensures a certain level of capability and maintains sorting accuracy.

[Problems to be solved by the invention] In the de-stoning process at rice milling factories, etc., as described above, a small-sized sorter for carefully sorting the mixed grains and a complicated conveyance route are required, and a large-sized de-stoning sorter is required. In each case, there was a need for a stone extractor that could completely sort stones without reducing performance.

In addition, as shown in FIG. 8, the conventional stone removal sorter has a large number of blow holes 101 on the upper edge of a wind turbine box 100 containing a built-in wind turbine.
The sorting board 102 formed with the wind turbine box 10 is placed in an inclined manner.
0 is connected to a vibration mechanism (not shown) to vibrate the sorting board 102, and the vibration and the blowing action from the blowhole 101 cause the rice grains on the sorting board 102 to rise slightly, so that they are at the lower end of the slope. In addition to discharging the refined product from the rice grain outlet 103, the stone pieces that have sunk below the rice grain layer are shaken up and sent to the stone outlet 1 at the upper end of the slope.
Since it is discharged from 04 and sorted, the sorting board 1
When the supply of raw rice to 02 stops, the grains on the sorting board 102 no longer flow out of the refined product outlet 103 while being pushed by the grains supplied later, and the large number of blowholes 101 remove the coarse grains. The sorting board 102, which has a planar shape, is swung upward by the vibration. And sorting board 1
The stone pieces are discharged from the stone outlet 104 in an unsorted state along with the stone pieces stagnant near both shoulders 102a on the upper side of the slope.

In this way, when the sorting work is completed, there is almost no sorting effect, so if you plan to sort the same type of rice grains next time, you can move the rice grains from the sorting board to the sorting board without ejecting all the rice grains in the machine.
Rice grains were left on the 02. Therefore,
In the rice milling lines of rice mills, etc., the stone removal process is the only process in which the entire amount cannot be discharged, which prevents fully automatic operation of rice mills, etc. ), and were forced to create a design that did not require the entire amount to be drained and cleaned.

The technical object of the present invention is to provide a stone 1 sorter that can completely sort the stones in the sorter and, at the end of the sorting, remove the metal from the rice grains while sorting.

Means for Solving Problem C] The present invention will be described below with reference to FIGS. 1 to 6, which correspond to embodiments.

A main sorting board 22 having a large number of protrusions 31 and blowholes 30 is mounted at a gentle slope on top of the main fan case 7, which is supported in a substantially box-shaped machine frame 1 so as to be able to vibrate freely. The lower end of the slope of the plate 22 is used as the fine product outlet 34, and the upper end of the slope is used as the mixed grain fall port 3.
In the stone removal sorting machine according to item 3, a. A sub-sorting board 41 is attached to one side of the main sorting board 22 at a gentle slope.

A part of the mouth and sub-sorting board 41 has a large number of protrusions 31 and blowholes 30.
At the same time, a damming part 42 whose upper end is 6 drops 048 is formed on the sloping upper side of the secondary sorting part 43, and a damming part 42 whose upper end is 6 drops 048 is formed on the sloping lower side of the secondary sorting part 43. Discharge portions 44 each having a blowing projection 46 facing a fine product outlet 45 are provided.

C. A cross-feed gutter 35 is provided for conveying the mixed grains falling from the mixed grain drop port 33 to the sub-sorting board 41, and the cross-feed gutter 3
5 and 01 sorting board 41 are connected through a communication port 36.

2.Furthermore, a fan 401 is installed at the bottom of the sub-sorting board 41.
A sub-fan case 40 is provided, which includes an electric motor 11402 that rotates the fan 401.

E. At the end of the operation of the stone removal sorter, the main fan case 7
fan 4 of the sub-fan case 40 before fan 25 of
A fan stop switch 404 connected to the electric motor 402 is provided to stop the fan.

This technical measure was taken.

[For production]

This allows the main sorting board 22 to have a blast action and a vibration action.
The raw material grains, such as rice grains, which are supplied to the raw material, are slightly floated by the jet wind and are pushed by the rice grains supplied later, and flow out from the refined product outlet 34 at the lower end of the slope, and are mixed into the raw material. Stone pieces with a large specific gravity sink to the bottom of the rice grain layer, and are thrown up by the protrusion 31 of the main sorting board 22 toward the side of the mixed grain fall port 33 at the upper end of the slope. A mixture of stones and rice grains near the mixed grain drop port 33 falls from the mixed grain drop port 33, is conveyed by the horizontal gutter 35, and is transferred from the communication port 36 to the sub-sorting board 4.
1.

The mixed grains in the sub-sorting board 41 are re-sorted by the secondary sorting part 43 in the same way as in the main sorting board 22, and the rice grains (refined grains) flow down to the discharging part 44 side on the downward slope and are discharged from the jet of the discharging part 44. The blast from the wind protrusion 46 rapidly discharges the fine particles from the outlet 45, and the stone pieces are shaken up and temporarily dammed at the damming part 42. When a certain amount of stones accumulates and only the stones are concentrated, they overflow from the damming part 42. and is discharged.

Steady operation continues in this way, but when there is no more raw material to be supplied at the end of the operation, the main sorting begins! The rice grains in 22 are not swept away by the raw material rice that is added later, but are gradually swung upward on the slope, fall from the mixed grain drop port 33 into the horizontal feed gutter 35, and are transferred to the sub-sorting board 41. Transported and sorted. Then, when there are no more rice grains to be conveyed from the horizontal gutter 35, the fan stop switch 404 is turned on.
When the fan 401 of the sub-fan case 40 is stopped, the rice grains that had been staying in the secondary sorting section 43 are shaken up by the secondary sorting section 43 which has been transformed into a swinging conveyor due to the stop of the blast, and the rice grains staying in the secondary sorting section 43 are shaken up by the stones in the damming section 42. The total amount is 5 with 4 falling ports.
It is discharged from 8.

[Embodiments of the invention]

Embodiments of the present invention will be described below in accordance with the examples shown in FIGS. 1 to 6.

FIG. 1 is a side sectional view of a stone removal sorter according to the present invention. A supply hopper 2 is mounted on the upper wall of the almost box-shaped machine frame 1.
A shutter plate 4 is slidably provided in the lower end opening 3 of the supply hopper 2, and a shutter opening/closing rod 5 for sliding the shutter plate 4 is provided to protrude outside the machine frame 1.

Further, near the bottom of the supply hopper 2, a suitable level sensor 6 as a grain presence/absence detector is installed.

A main fan case 7 is provided within the machine frame 1 so as to be swingable. That is, the support shafts 8 and 9 are welded to the wall surface of the fan case 7, and both ends of the support shaft 8 are supported by a pair of bearings 10, and the bearings 10 are each fixed to one end of a pair of swing arms 11, so that the support shaft 8 can be oscillated. The other end of the movable arm 11 is a support shaft 12
Further, both ends of the support shaft 12 are pivotally supported by a pair of bearings 13 fixed to both side walls of the machine frame 1.

Similarly, both ends of the support shaft 9 are supported by a pair of bearings 14, and the bearings 14 are each fixed to one end of a pair of swinging arms 15, and the other end of the swinging arm 15 is fixed to a support shaft 16. Both ends of the machine frame 1 are pivotally supported by a pair of bearings 17 fixed to both side walls of the machine frame 1.

A vibration mechanism for imparting a vibration effect to the main fan case 7 that is swingably supported within the machine frame 1 in this manner will be described. The crankshaft 19, which receives rotational force from the crank pulley 18, is rotatably supported by both side walls of the machine frame 1. As a result, the main fan case 7 vibrates obliquely up and down as shown by the arrow W with the support shafts 12 and 16 as fulcrums.

The upper part of the main fan case 7 is open, and a main sorting board 22 is mounted on the upper edge of the main fan case 7. In addition, air intake ports 23 are formed on both side walls of the main fan case 7, and a fan shaft 24 passes through the air intake ports 23 and is rotatably supported on both side walls of the machine frame 1. The fan shaft 24 has a fan 25
is fixed and a fan pulley 26 is attached to one end of the fan pulley 26.
The fan pulley 26, the crank pulley 18, and the motor pulley 28 of the main electric motor 27 are interlocked and connected by a V-belt 29.

Next, while referring to FIGS. 2 to 6, the main sorting board 22
etc. will be explained in detail. The main sorting board 22 is mounted on the upper edge of the main fan case 7 in an airtight manner with a gentle slope.
A large number of blowholes 30 and protrusions 31 connected to the downward slope of the blowhole 30 and having a rocking effect above the slope are formed over the entire surface of the board. In addition, side walls 32 are erected on both ends of the main sorting board 22 perpendicular to the direction of inclination, and the upper end and lower end of the inclination are opened so that the upper end becomes the mixed grain falling port 33 and the lower end is used for the refined product stream. The outlet 34 is formed.

A cross feed gutter 35 is attached to the mixed grain drop port 33 at a position lower than the mixed grain drop port 33 and which communicates with the main fan case 7 over the entire length of the mixed grain drop port 33. i3
At the bottom of the gutter 5, a blowing protrusion 37 is formed to convey the mixed grains to a communication port 36 formed by opening the side wall 32 at the terminal end of the transverse gutter 35 (see FIG. 5). That is,
The bottom of the horizontal gutter 35 is punched out from below to the top to form a protrusion 3.
7a and cracks 38 that occur during punching.
is used as a blowhole. As a result, the airflow within the main fan case 7 is ejected to convey the mixed grains toward the communication port 36 through the slit 38 below the cross-feeding gutter 35 . 39 is horizontal transport tiM
35, and this side wall 39 is a side wall 32 provided on both sides perpendicular to the inclination direction of the main sorting board 22.
．． Connect with 32. In addition, in this embodiment, the blowing protrusion 37
Although it was placed slightly toward the three side walls, there was no direct communication port 36.
You can also turn it to the side.

On one side of the main fan case 7, that is, on the connection hole 36 side,
A sub-fan case 40 having a fan 401, an electric motor 402 connected to the fan 401, and an intake port 403 is attached,
While opening the upper part of this sub-fan case 40, the main sorting begins! ! The sub-selecting board 41 is mounted in substantially the same slope as the sub-selecting board 22.

Reference numeral 404 turns off the power to the electric motor 402)? N40
This is a fan stop switch for stopping the fan. The sub-sorting board 41 has a dam section 4 on the sloped upper side of the communication port 36.
2, a position near the communication port 36 and lower than the communication port 36 (with a step) is formed in the secondary sorting part 43, and furthermore, the inclined lower side of the secondary sorting part 43 is formed in the discharge part 44. , the lowermost end of the discharge section 44 serves as a fine product outlet 45. In other words, the secondary sorting section 43 has main sorting! A blow hole 30 and a protrusion 31 similar to those formed in 22 are provided on the entire surface, and a blow hole 30 and a protrusion 31 that are similar to those formed in 22 are provided on the entire surface, and the discharge part 44 has a blow hole 30 and a protrusion 31 that face the fine product outlet 45.
6 is formed on the entire surface or a part near the secondary sorting section 43. The blower projection 46 is the blower projection 3 provided on the horizontal gutter 35.
7, the crack 47 as a blow hole and the protrusion 4
6a is formed. Further, the damming part 42 is formed with a rough surface, the tip of which serves as a stone fall port 48, and the connecting part between the damming part 42 and the secondary sorting part 43 is formed to be rotatable by a shaft 49. As a result, the dam portion 42 is fixed in a slightly rotated state about the shaft 49 upward. In other words, the sub-sorting board 41 is provided with substantially the same slope as the main sorting board 22, and the damming part 42 at the upper end of the slope is provided with an even steeper slope. In addition, the shaft 49 is made to protrude outside the sub-fan case 40 and is connected to the operating piece 49a. Further, a side wall 411 is provided upright on the iWJ sorting board 41, and a portion of the side wall 411 facing the terminal end of the cross-feeding gutter 35 is opened as a communication port 36.

Reference numeral 50 is a right-hand lower gutter that receives stones falling from the stone fall port 48 of the damming part 42, and a part of the right-hand lower gutter 50 is a transparent part 50a, so that the state of falling stones can be visually observed from the outside. . A stone discharger 8!51 fixed to the inner wall of the machine frame 1 is provided below the right lower part 150, and on the other hand, the main sorting board 22
A fine product flow down trough 52 fixed to the main fan case 7 is provided below the quality product outlet 34 at the inclined lower end of the machine frame and the quality product outlet 45 of the sub-sorting board 41. 1 A refined product discharge gutter 53 leading to the outside is fixed to the machine frame 1. Note that the part of the machine frame 1 facing the right lower gutter 50 is opened and an inspection door 54 is provided.

Next, specific operations in the above embodiment will be explained. First, rice grains discharged from the discharge port of a rice milling machine (not shown) are fed into the supply hopper 2 through a chute pipe, etc., and the electric motor 2
7 and 402 are activated, the shutter opening/closing rod 5 is pulled, the shutter plate 4 is slid, and the rice grains in the supply hopper 2 are dropped from the opening 3 onto the main sorting board 22.

On the other hand, the main sorting board 22 is connected to the crankshaft 19. The airflow generated by the fan 25 vibrates together with the main fan case 7, which is vibrated by the vibration mechanism including the crank arm 21, etc., and is blown out onto the main sorting board 22 from the blowhole 30 as shown in FIG. . In such a state, the rice grains that have fallen from the opening 3 onto the main sorting board 22 are gradually and uniformly spread over the entire surface of the main sorting board 22, and
The main sorting board 22. The rice grains tend to float up from the surface of the board, and flow down toward the refined product outlet 34 at the lower end of the slope while being pushed by the rice grains further falling from the opening 3, and finally fall from the refined product outlet 34 into the refined product flow down trough 52. It is taken out of the machine through the discharge gutter 53.

On the other hand, the stone debris mixed in the rice grains has a higher specific gravity than the rice grains, so it sinks to the bottom of the rice grain layer while being subjected to vibration, is pushed up by the protrusion 31 toward the mixed grain fall port 33 on the upper side of the slope, and finally is the horizontal feed R35 from the mixed grain falling port 33.
fall inside. At this time, not only the stones fall into the cross-feeding gutter 35, but a certain amount of rice grains near the mixed grain drop opening 33 fall together with the stones.

In this way, the stones that have fallen onto the cross feeder 8135 never return onto the main sorting board 22, and are conveyed to the communication port 36 side as a stream of mixed grains of stones and rice grains. That is, the airflow from the main fan case 7 is ejected from the crack 38 of the jet protrusion 37 in an oblique direction toward the side wall 39, whereby the mixed grains are gradually guided to the communication port 36 while colliding with the side wall 39. In addition, since the cross feed gutter 35 also vibrates together with the main fan case 7, the mixed grains in the cross feed 135 are also subjected to this vibration effect, and the conveyance is caused by the rocking action of the protrusion 31 that faces diagonally with respect to the side wall 39. It is something that is encouraged. Note that if the cross-feed gutter 35 is formed in a slope shape toward the communication port 36, the conveyance speed will further increase.

The mixed grains are transported by the cross-feed gutter 35 and fall from the communication port 36 to the secondary sorting section 43 of the sub-sorting board 41 (as described above, there is a step between the communication port 36 and the sub-sorting board 41). Similar to the main sorting W122, the vibration effect and the fan 40
Due to the action of the air stream 1 ejected from the blowhole 30, the rice grains float slightly and flow toward the discharge section 44, and the rice grains flow toward the discharge section 44.
The rice grains that have reached 4 are placed in the blast protrusion 4 facing toward the refined product discharge port 45.
The fine products are rapidly conveyed to the fine product discharge port 45 side by the blast from 6, fall from the fine product discharge port 45 into the fine product stream 152, and are sent out of the machine from the fine product discharge wi 53 along with the precision products that fall from the precision product discharge port 34 of the main sorting board 22. It is taken out.

On the other hand, the stone sinks to the bottom of the gutter, and the protrusion 31 blocks the dam 4.
It is swung up to the second side and is dammed by the steeply inclined damming part 42. In this way, when the stones selected by the secondary sorting section 43 are shaken up and accumulate in the dam section 42 in excess of a certain amount, as shown in Fig. 6, the stones exceeding the certain amount overflow. The stones flow from the stone drop opening 48 through the right side lower part 150 and into the stone discharge gutter 51, and are discharged to the outside of the machine. In other words, since the area around the dam 42 is concentrated to only stones, there is no chance that any fine particles will fall from the stone fall port 48.

The above is the operation during so-called steady operation, and the operation at the end of operation will be described below.

When the raw rice grains in the supply hopper 2 run out during steady operation, the rice grains on the main sorting board 22 are not pushed down by the rice grains falling from the supply hopper 2, and are moved to the mixed grain drop port due to the vibration effect. 35 side, and all of them fall from the mixed grain drop port 35 into the horizontal feed gutter 35.

Side transport! The rice grains that have fallen into the 1li35 are conveyed to the communication port 36 side and flow into the sub-sorting board 41 from the communication port 36, and then by the secondary sorting section 43, refined grains are transferred to the discharge section 44 side, and stones are transferred to the damming section 42 side. The stones are separated and conveyed, and the precious stones fall from the fine article outlet 45 into the fine article flow down trough 52, and the stones fall from the stone drop port 48 into the stone discharge 8!51 and are taken out of the machine. When there are no more rice grains to be conveyed from the horizontal feed gutter 35, the rice grains are blocked by the damming part 42 and cannot be conveyed downward, and the rice grains remain slightly floating and are held at a certain amount for secondary sorting. It stays on the portion 43. At this time, the fan stop switch 404 causes the electric motor 40 to
2, and the rotation of the fan 401 is stopped.

As a result, the rice grains staying on the secondary sorting section 43 are shaken up by the protrusions 31 of the secondary sorting section 43 and pushed against the dam section 42 (the angle of repose changes), and the rice grains staying on the secondary sorting section 43 are pushed up against the dam section 42 (the angle of repose changes).
(l! It is effective if the blocking portion 42 has a rough surface).

At this time, the stones dammed up by the damming part 42 are pushed by the rice grains and fall from the stone drop opening 48, and the entire amount is taken out of the machine through the stone discharge gutter 51 together with the rice grains.

FIG. 7 shows another embodiment of the damming part of the sub-sorting board 41, in which the damming part 42A is fixed at the same slope as the secondary sorting part 43 without having a steep slope. A large number of blower protrusions 54 facing toward the side are provided (see FIG. 5), and a slit 55 of the blower protrusions 54 communicates with the sub-fan case 4o.

In this case, the stones sorted by the secondary sorting section 43 are temporarily blocked by the blowing action of the blower projection 54 (the rice grains are blown back to the secondary sorting section 43 side), and when a certain amount of stones have accumulated. The stone overflows and only the stones fall from the stone fall port 48. When the rotation of the fan 401 of the sub-fan case 40 is stopped at the end of the operation, the stones blocked by the damming part 42A and the rice grains staying in the secondary sorting part 43 are removed by the blowing action of the blowing protrusion 54. The entire amount falls from the stone fall port 48 without being hit.

In addition, in each of the above embodiments, when stopping the fan 401 of the sub-fan case 4o at the end of operation, the fan 40
Fan stop switch 4o4 that cuts off the power to the electric 1fi402 directly connected to 1 (not limited to the example shown, it would be dangerous to install it inside the aircraft, and any switch mechanism may be used)
is actuated by a signal from a level sensor 6 attached to the bottom of the supply hopper 2.
A timer (not shown) is interposed between the hopper and the fan stop switch, and when the level sensor 6 detects that the supply hopper is empty, the timer is activated and the rice grains on the main sorting board 22 are After passing through tJ35, the secondary sorting section 43
Automatic operation becomes possible if the electric motor 402 is configured to stop when the timer times up after the time (time required for transporting the object) has elapsed.

In addition, as shown in FIG. 2, a mixed grain removal gutter 56 is branched from the stone discharge gutter 51, and a switching valve 57 is provided at the branched portion.
At the same time as the electric motor 11402 is stopped, the switching valve 57 is switched using an electromagnetic solenoid (not shown) to open the mixed grain extraction gutter 56, and the small amount of mixed grains discharged at the final stage are collected separately from the stones. This allows for perfect selection.

〔Effect of the invention〕

As described above, according to the present invention, mixed grains containing stones are not transported to a separate small-sized stone removal sorter for separation.
The stone removal sorter can perform careful selection while maintaining a certain level of performance.

In other words, on the lower side of the slope of the secondary sorting part of the sub-sorting board that sorts mixed grains, we formed a discharge part equipped with a blowing protrusion facing the refined product outlet at the lower end of the slope, so that the particles that are sorted in the secondary sorting part are The rice grains (refined grains) that are about to flow down are rapidly flowed down from the outflow port by the blast from the jet, which eliminates the bulk of the refined grains in the secondary sorting section and allows them to be transported from the horizontal gutter. Since the mixed grains that come from the grains are quickly selected, a high sorting ability can be ensured.

In addition, a switch is installed to stop the fan in the sub-fan case that blows air to the sub-sorting board, and by stopping the fan at the end of operation, the rice grains that tend to stay in the secondary sorting section are shaken up all at once to the dam section. By discharging from the stone fall port, the entire amount can be discharged without leaving any rice grains in the machine.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIG. 3 is a partially enlarged plan view of FIG. 1.
Figure 4 is a sectional view taken along line 8-A in Figure 3, and Figure 5 is the same <
FIG. 6 is a sectional view taken along line B-8, FIG. 6 is a sectional view taken along line C--C, FIG. 7 is a plan view showing a part of another embodiment, and FIG. 8 is a perspective view of a conventional example. 1... Machine frame, 2... Supply hopper, 3... Opening, 4... Shutter plate, 5... Shutter opening/closing rod,
6... Level sensor, 7... Main fan case, 8
゜9... Support shaft, 10... Bearing, 11... Swing arm, 12... Support shaft, 13.14... Bearing, 15...
・Swinging arm, 16... Support shaft, 17... Bearing, 18
... Crank pulley, 19 ... Crank shaft, 20
... Mounting is on the board, 21... Crank arm, 22...
・Main sorting board, 23...Intake port, 24...Fan shaft,
25...Fan, 26...Fan pulley, 27.
...Main motor, 28...Motor pulley, 29...
・V belt, 30... Blower hole, 31... Protrusion, 32
...Side wall, 33...Mixed grain falling port, 34...Precious product outlet, 35...Horizontal gutter, 36...Connection port, 37.
...Blow projection, 38...Crack, 39...Side wall, 40
... Sub-fan case, 401... Fan, 402.
...Electric motor, 403...Intake port, 404...Fan stop switch, 41...Sub-sorting board, 411...Side wall, 42...Damming section, 43...Secondary sorting section, 44
...Discharge part, 45...Socket discharge port, 46...Blowing protrusion, 47...Crack, 48...Stone falling port, 49...
・Axis, 50...6 Downstream gutter, 51...Stone discharge gutter, 52
...Precious product flow down gutter, 53...Precious product discharge gutter, 54...
Blast protrusion, 55... Crack, 56... Mixed grain extraction gutter,
57...Switching valve.

Claims (2)

[Claims] (1) The main sorting board 22, which has a large number of protrusions 31 and blowholes 30, is mounted at a gentle slope on top of the main fan case 7, which is supported in a substantially box-shaped machine frame 1 so as to be able to vibrate freely. In a stone removal sorter in which the inclined lower end of the main sorting board 22 is made into a fine product outlet 34 and the inclined upper end is made into a mixed grain falling port 33, a sub-sorting board 41 is installed on one side of the main sorting board 22 with a gentle slope. A part of the sub-sorting board 41 serves as a secondary sorting section 43 in which a large number of protrusions 31 and blowholes 30 are formed, and the upper end of the secondary sorting section 43 is attached to the inclined upper side of the secondary sorting section 43. A discharge part 4 has a damming part 42 formed as a stone fall opening 48, and a blowing protrusion 46 facing a fine product outlet 45 formed at the lower end of the slope.
4 are respectively provided, and a transverse gutter 35 is provided for conveying the mixed grains falling from the mixed grain drop port 33 to the sub-sorting board 41, and the transverse gutter 35 and the sub-selecting board 41 are connected through a communication port 36. A sub-fan case 40 is provided at the bottom of the sub-sorting board 41, and includes a fan 401 and an electric motor 402 that rotates the fan 401. A stone removal sorting machine characterized in that a fan stop switch 404 connected to an electric motor 402 is first provided to stop a fan 401 of a sub-fan case 40. (2) A level sensor 6 connected to a fan stop switch 404 is installed near the bottom of the supply hopper 2 that feeds raw materials into the main sorting board 22.
The stone removal sorter described in section 1).