JPH0937675A - Automatically sorting system for pearl oyster for pearl culture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatically sorting system reduced in cost through obviating the necessity of hands in inspecting the presence/absence of pearl nuclei and capable of improving productivity. SOLUTION: This automatic sorting system for nucleated pearl oysters for pearl culture has the following equipment: a delivery device 2 to individually and intermittently deliver many pearl oysters charged in the system, a conveyer 3 to convey the delivered pearl oysters successively at a specified speed, a discriminator 4 to discriminate the position of the back edge and the face/ reverse surface of each of the conveyer pearl oysters and then deliver them so as to align their back edges in the identical direction and orient their face sides upward, and a sorter 5 to irradiate the delivered pearl oysters with through-view rays while conveying them to inspect the presence/absence of the pearl nuclei.

Description

Detailed Description of the Invention

[0001] The present invention relates to an automatic selection system for automatically selecting the state of core insertion of Akoya shellfish for pearl cultivation.

[0002]

2. Description of the Related Art Generally, Akoya oysters used for the production of cultured pearls are those that secrete a nacreous layer on the surface of the nucleus when they are cultivated in the sea for about one year with the gonads of the pearl oysters being put into the nucleus. Are known. When culturing these pearls, the oysters and shellfish may excrete the nucleus during the culturing. Therefore, a selective inspection is performed to confirm the presence or absence of the nucleus as necessary. In the case of performing such a screening inspection, conventionally, a method has been adopted in which the ako and shellfish that have been trained are manually set in an apparatus, X-rays are irradiated to see through the inside, and the presence or absence of a nucleus is confirmed.

[0003]

However, in the above-mentioned conventional sorting method, a large number of pearl oysters and shellfish are set in the X-ray apparatus one by one and the presence or absence of nuclei is determined. There is a problem that the price rises and the productivity is low.

The present invention has been made in view of the above conventional circumstances, and provides a completely new automatic pearl and pearl oyster selection system capable of reducing the cost by eliminating the need for manual judgment work and improving the productivity. It is intended to be provided.

[0005]

DISCLOSURE OF THE INVENTION The present invention is an automatic sorting system for pearl-cultured Akoya pearl oysters that contains a core, and a delivery device for delivering a large number of pearl pearl oysters individually and intermittently. A transport device that sequentially transports the stored Akoya oysters at a predetermined speed, and the position of the back edge of the unloading Akoya oysters, and the front and back sides are determined, and the back edge of the Akoya oysters faces in the same direction and the front side faces the upper surface. A front and back discriminating device for sending out, and a non-defective item selecting device for selecting the presence or absence of nuclei by irradiating the sent out shell and shellfish with a perspective line while transporting the sent shellfish and shells, and each of the above devices has the following configuration It is characterized by consisting of.

The delivery device includes a storage hopper having an inlet and an outlet for the pearl oysters, a vibrator for imparting vibration to the pearl oysters via the hopper, and the pearl oysters placed laterally upstream of the outlet. In addition, it is configured by a passage having a size that is individually inserted and an intermittent mechanism having an opening / closing plate that intermittently opens and closes the passage outlet.

The transport device is a belt conveyor having an inlet communicating with the outlet of the storage hopper and an outlet communicating with the front / back discriminating device. The outer peripheral surface of the belt individually stores kokkai and shellfish. The partition plates are arranged upright at predetermined intervals.

The above-mentioned front and back discriminating device is fixed to a rotatable table on which the pearl oysters are placed, and a discrimination plate which is fixed above the table so as to cross the table, and a part of the outer peripheral edge of the pearl oysters contacts with the transportation. And a position detection sensor and a front and back detection sensor attached to the discrimination plate, and based on a detection signal from the position detection sensor, the table is rotationally driven so that the back edge of the oyster or shellfish is substantially parallel to the discrimination plate. Together with the front and back discriminating means for discriminating the front and back based on the detection signal from the front and back detection sensor, when the front and back discriminating means determines the back side, the Akoya shellfish is inverted and sent to the front side,
When it is determined to be the front side, it is composed of a front and back side feeding mechanism that sends out as it is.

The above-mentioned sorting device displays a X-ray image by a belt conveyer that conveys the Akoya shells sent from the front and back delivery mechanism, an X-ray irradiator that irradiates the Akoya shells that are being transferred with X-rays, and the X-ray image. It is composed of an image display means.

[0010]

In the automatic sorting system of the present invention, in order to confirm and inspect the core of Akoya oysters, the Akoya oysters are put into the storage hopper of the delivery device, and the automatic sorting system is operated in this state. Then, the oysters move toward the outlet due to the vibration of the storage hopper and continuously pass through the passages one by one individually, and at the outlets of the passages, the pearl oysters are intermittently delivered by opening / closing the opening / closing plate. .

The pearl oysters delivered from the delivery port of the storage hopper are delivered from the receiving port of the belt conveyor onto the belt divided by the partition plate, and are transported to the delivery port at a predetermined speed. Here, by setting the intermittent time of the opening and closing plate, the conveyance speed of the belt conveyor,
The number of inspections per hour is determined.

The carried-out pearl oysters are placed on the table of the front / back discriminating device, and at the same time, a part thereof comes into contact with the discriminating plate. In this state, the back edge of the pearl oyster is detected by the position detection sensor, the table is rotationally driven so that the back edge is parallel to the discrimination plate, and then the front and back of the pearl oyster are detected by the front and back detection sensors. By this detection, when the pearl oysters are facing the front side, they are sent out as they are, and when they are on the back side, they are inverted and sent to the front side.

As a result, the pearl oysters are delivered onto the belt conveyor of the sorting device with their back edges facing in the same direction and their front sides facing up. Then, the Akako and shellfish are irradiated with X-rays while being transported on the belt, and the presence or absence of nuclei is determined. If there are nuclei, they are collected as good products, and if there are no nuclei, they are separately collected as defective products.

As described above, according to the automatic pearl-cultivating Akoya shellfish selection system of the present invention, a delivery apparatus for individually and intermittently sending out the Akoya shellfish and a transfer apparatus for sequentially transporting the Akoya shellfish at a predetermined speed. A front and back discriminating device that discriminates the position of the back edge of the conveyed Akoya and the front and back, and sends out so that the back edge of the Akoya and the front side face up.
Since this was equipped with a sorting device for transporting the sent koya oysters and irradiating them with X-rays to select the presence or absence of nuclei, just by putting the koya oysters in the storage hopper as described above, The inspection can be performed automatically, and a large number of conventional manual inspection operations can be eliminated. as a result,
Labor costs and other costs can be reduced, productivity can be improved, and the price of pearls can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 8 are views for explaining an automatic sorting system for pearl cultivating Akoya shellfish according to an embodiment of the present invention. FIG. 1 is a schematic configuration diagram showing the automatic sorting system of the present embodiment, and FIG. Sectional view of the storage hopper, FIG. 3 is a side view of the feeding device and the transporting device, FIG. 4 is a schematic configuration diagram of the front and back discriminating device, and FIGS. 5 to 7 are plan views and side views showing main parts of the front and back discriminating device, respectively. FIG. 8 is a rear view, and FIG. 8 is a view showing the front and back surfaces of the Akoya shellfish.

First, the pearl cultivating Akoya shellfish used in this embodiment will be described. As shown in FIG. 8, the oyster shell 10 is a bivalve shell consisting of an upper shell 10a on the front side and a lower shell 10b on the back side, and the engagement of the back edge 10c is substantially linear, and the surface of the upper shell 10a expands greatly. There is a high shell 10d, and the surface of the lower shell 10b has a bulge corresponding to the high shell 10d, but is flat as a whole. When culturing pearls, a piece (tissue piece) together with a spherical nucleus is inserted into the gonad of the above-mentioned Akoya oyster 10 and hangs down on a raft for cultivation for several years to form a pearl layer on the outer surface of the nucleus. .

Next, the automatic sorting system of this embodiment will be described in detail. In FIG. 1, an automatic sorting system 1 according to the present embodiment includes a delivery device 2 for individually and intermittently delivering Akoya oysters, a delivery device 3 for sequentially delivering the delivered oysters and oysters 10 at a predetermined speed, and the delivery device. The position of the back edge 10c and the front and back sides of the formed Akoya shellfish 10 are identified, and the Akoya shellfish 10 is identified.
Front and back discriminating device 4 which sends out so that its back edge 10c is in the same direction and its front side 10a faces the upper surface, and X-rays are radiated while carrying this sent Akoya scallop 10 to judge the presence or absence of a nucleus. It is composed of a sorting device 5.

As shown in FIG. 2, the delivery device 2 is a storage hopper 6 having an input port 6a at the upper end and a delivery port 6b at the lower end, which is tilted by about 45 degrees. Are divided into first to third passages 8a to 8c by three guide members 7. Each of the passages 8a to 8c is shaped and sized so that the oyster shell 10 is inserted sideways. The third passage 8c is a spare and is normally closed by a lid (not shown). Further, a vibrator 9 is attached to the outer wall of the storage hopper 6,
The vibrator 9 moves the oyster shell 10 to the delivery port 6b by applying vibration to the storage hopper 6.

Intermittent mechanisms are provided at the outlets of the first and second passages 8a and 8b, and the intermittent mechanisms are provided in the respective passages 8a and 8a.
The first and second opening / closing plates 11 and 12 formed in a substantially V shape for opening / closing 8b, and the opening / closing plates 11 and 12 being a link member 13,
The motor 15 is opened and closed via the eccentric cam 14. The upper end of the first opening / closing plate 11 is pivotally supported by the guide member 7, and the bent portion is pivotally supported by the tip of the link member 13. The upper end of the second opening / closing plate 12 is pivotally supported by the link member 13, and the bent portion is pivotally supported by the central guide member 7.

A ring member 16 is rotatably inserted into the eccentric cam 14, and a rear end portion of the link member 13 is connected to the ring member 16. A rotary shaft 17 connected to the output shaft of the motor 15 is coupled to the eccentric cam 14, and the link member 13 is moved forward and backward by the rotation of the rotary shaft 17 to cause the first and second opening / closing plates 11 to move. , 12 alternately open and close the outlets of the passages 8a, 8b, thereby intermittently sending out the pearl oysters 10.

A guide member 18 is rotatably disposed between the opening / closing plates 11 and 12 and the delivery port 6b. The guide member 18 includes four guide blades 19 on the shaft 18a.
And a pulley 20 connected to the outer end of the shaft 18a, and the pulley 20 and a pulley 21 connected to the rotating shaft 17 of the motor 15 are wound around a belt 22. A cushioning rubber sheet (not shown) is attached to the guide blades 19. The guide member 18 rotates in synchronization with the opening / closing of the opening / closing plates 11 and 12, and absorbs the impact at the time of feeding the oyster shell 10 and guides it to the delivery port 6b.

As shown in FIG. 3, the transfer device 3 is constructed by arranging a belt conveyor 26 in a rectangular parallelepiped transfer main body 25 extending in a vertical direction, and a lower end of the transfer main body 25. Inlet 2 communicating with the above-mentioned outlet 6b
5a, and a carry-out port 25b communicating with the front / back discriminating apparatus 4 is formed at the upper end, and a beak-shaped carry-out duct 25c is connected to the carry-out port 25b.

The belt conveyer 26 is a pair of rollers 27, 27 rotatably supported at both ends of the transfer body 25.
An endless belt 28 is wound around the upper roller 27
A drive motor (not shown) is connected to. Further, partition plates 29 are erected at predetermined intervals on the endless belt 28, and the partition plates 29 form a storage portion for the Akako and the shell 10.

As shown in FIGS. 4 to 7, the front and back discriminating apparatus 4 fixes a rectangular frame-shaped fixed frame 31 to the inner wall of the housing 30, and forms a part of the front and back feeding mechanism in the fixed frame 31. The oscillating frame 32 is disposed so as to be rotatable left and right, the disc table 33 is rotatably disposed on the oscillating frame 32, and the discriminating plate 34 that crosses above the disc table 33 in the diametrical direction thereof. The discriminating plate 34 is bridged and connected to support frames 35, 35 which are vertically fixed on the left and right of the swing frame 32. A maintenance opening 30a is formed on the upper wall of the housing 30 and is opened and closed by a lid member (not shown).

As shown in FIGS. 5 and 6, the swing frame 32 includes a U-shaped bottom plate 32a, a front wall 32b and a rear wall 32.
c is welded, and rods 36 and 37 are welded to the front wall 32b and the rear wall 32c.
7 is the front wall 3 of the fixed frame 31 via the bearings 38 and 39.
It is rotatably supported by 1a and the inner wall 31b. An output shaft 41a of a stepping motor 41 is connected to the rear rod 37 via a free coupling 40, and the motor 41 is bolted and fixed to a rear wall 31c of the fixed frame 31. This stepping motor 41
Drives the swing frame 32 to the left and right by 45 degrees.

The shaft portion 33a of the disk table 33 is rotatably inserted and supported by the boss portion 42 connected and fixed to the bottom plate 32a of the swing frame 32 with the bearing metal 43 interposed. Outer peripheral teeth 33b of the disc table 33
A small-diameter gear 45 is engaged with the small-diameter gear 45, and an output shaft 46a of a reversible motor 46 fixed to the bottom plate 32a by bolts is coupled to the small-diameter gear 45. The reversible motor 46 rotationally drives the disc table 33 via a small-diameter gear 45. A white rubber anti-slip mat 47 is attached to the upper surface of the disc table 33 and the inner surface of the discriminating plate 34 so as to absorb the impact at the time of loading.

As shown in FIG. 4, the disc table 33 is provided.
Guide plates 50, 50 are disposed on the left and right sides of the. Each of the guide plates 50 is rotatably supported on the inner wall of the housing 30 via a hinge 51, and is prevented from rotating downward by a stopper member 52. The left and right guide plates 50 and the discrimination plate 34 guide the shellfish 10 carried out on the disc table 33 without spilling outward. Further, when the disc table 33 swings to the left and right, the guide plate 50 is flipped up so that there is no interference.

The right and left side portions of the disk table 33 respectively form the progressive ducts 5 which constitute the remaining portions of the front and back feeding mechanism.
5, the anti-sending duct 56 is provided, and each of the ducts 5
The reference numerals 5 and 56 are fixed to the fixed frame 31. The progressive duct 55 includes a reversing portion 55b that bends inward from a trumpet-shaped receiving port 55a and a re-reversing portion 55c that subsequently bends outward. The downstream end of the re-reversing portion 55c is fed. It is an exit 55d. This progressive duct 55 is sent when the front side 10a of the Akoya scallop 10 on the disc table 33 faces the upper surface, and after being reversed to the back side by the reversing section 55b, it is reversed again by the re-reversing section 55c. By doing so, it is configured so that the front side faces up. In addition, the counter-feed duct 56 is a trumpet-shaped receiving port 5.
The inversion portion 56b is bent inward from 6a, and the linear portion 56c linearly extends from the inversion portion 56b. The downstream end of the linear portion 56c serves as a delivery port 56d. This counter duct 56
Is to be delivered when the back side 10b of the oyster shell 10 faces the upper surface, and is configured to be delivered as it is after being inverted to the front side by the inverting section 56b.

A pair of left and right position detecting sensors 57 are fixed to the upper portion of the discriminating plate 34, and both position detecting sensors 57 are attached at positions facing both ends of the back edge 10c of the oyster shell 10. The detection sensor 57 is configured to emit light from the light source thereof, detect the amount of reflected light, and output the amount of light to an ECU (electronic control unit, not shown) as front / back discriminating means.

A front / back detection sensor 58 is fixed to the upper end of the discriminating plate 34. The detection sensor 58 includes a pair of left and right detection portions 58a and 58b each having a light emitting portion and a light receiving portion. The detection parts 58a and 58b are attached to the positions facing the central left and right parts of the oyster shell 10.
The detection sensor 58 is configured to emit light from the light emitting units of both the detection units 58a and 58b, receive the reflected light at the light receiving unit, and output the detection time from the light emission to the light reception to the ECU.

The ECU uses the position detecting sensors 5 described above.
The amount of light from 7 is read, and from the amount of light, white (mat 47
Color) or black-brown (color of Akoya shellfish 10). If it is determined to be white, a drive signal is output to the reversible motor 46, and if both are determined to be black-brown, a stop signal is output. Is configured. That is, since the anti-slip mat 47 on the disk table 33 is white and the pearl oysters 10 are generally blackish brown, the amounts of light from the two are different. Therefore, while either one of the sensors is detecting white, the back edge 10c of the oyster shell 10 is
Is not parallel to the discriminating plate 34, and is skewed. On the other hand, when both sensors detect blackish brown, the back edge 10c of the kokai 10 comes into contact with the discrimination plate 34 substantially in parallel.

Further, the ECU has a front / back detection sensor 58.
The detection time from each of the detection units 58a and 58b of
When it is determined that both detection times are substantially the same, a rightward (clockwise) rotation signal is output to the stepping motor 41. As a result, the Akoya kai 10 is sent to the side opposite to the sending duct 56,
Here, it is inverted and sent as the front side. When both detection times are different, a rotation signal to the left (counterclockwise) is output. As a result, the pearl oysters 10 are delivered to the progressive duct 55 side, where they are inverted-re-inverted and delivered to the front side as described above. That is, as described above, in the pearl oyster 10, the upper shell 10a on the front side has the high shell 10d that greatly expands, and the lower shell 10b on the back side has almost no bulge and is substantially flat. For this reason, the front and back of the oyster shell 10 are discriminated by comparing the detection times from the left and right detectors 58a and 58b.

The sorting device 5 includes a belt conveyor 60 disposed below the counter-feed duct 55 and the progressive duct 56, an X-ray irradiation device 61 disposed in the middle of the conveyor 60, and the irradiation. It is composed of a monitor 62 (image display means) for displaying an image from the device 61. The belt conveyor 60 has the same basic structure as that described above, and has a structure in which a belt 60b is wound around a pair of rollers 60a and the rollers 60a are rotationally driven by a motor. The X irradiation device 61 is composed of a radiation unit 61a that radiates X-rays to the scallop 10 from below the belt conveyor 60, and a photographing unit 61b that photographs the radiation. A bucket 63 is arranged behind the belt conveyor 60 to collect the non-defective Akako and shellfish after the inspection.

Next, the operation of the automatic sorting system 1 of this embodiment will be described. The large number of pearl oysters 10 put into the storage hopper 6 gradually move toward the outlet 6b due to the vibration from the vibrator 9, and the first and second passages 8
It enters into a and 8b. At the passage outlet, the first and second opening / closing plates 11 and 12 are alternately opened and closed, and the pearl oysters 10 are delivered from the passages 8a and 8b alternately and intermittently, and guided by the guide vanes 19 to deliver the outlet. 6b, and enters the belt conveyor 26 from here. The belt conveyor 26 conveys the Akako shellfish 10 one by one at a predetermined speed, is carried into the disc table 33 from the carry-out duct 25a, and any one of the outer peripheral edges thereof contacts the discrimination plate 34.

When any of the left and right position detecting sensors 57 detects the anti-slip mat 47 in white, the disk table 33 is rotated, and when both detected colors become blackish brown, the rotation is stopped. As a result, the back edge 10 of the Akoya shellfish 10
The c will be in contact with the discrimination plate 34 in parallel. Next, when the detection time from the front / back detection sensor 58 is different, the front side 10a is determined, and the swing frame 32 is rotated 45 degrees to the left. As a result, the Akoya scallop 10 causes the progressive duct 55
Sent out. When the detection times are substantially the same, the back side 10b is determined, and in this case, the swing frame 32 is rotated 45 degrees to the right. As a result, the Akoya-kai 10 is sent out into the anti-return duct 56.

The progressive duct 55 or the counter duct 56
In any case, the front side of the Akoya shellfish 10 sent from the front side faces the upper surface, and the back edge 10c faces the front. Then, the inside core of the Akakokai 10 placed on the belt 60b of the belt conveyor 60 is photographed by the X-ray irradiation device 61, and this is displayed on the monitor 62.
This confirms the presence or absence of a core of the Akoya oysters 10, and if there is a core, collects it in the bucket 63 as a good product, and if there is no core, collects it as a defective product separately.

As described above, according to the present embodiment, the Akagokai 1
It is possible to automatically convey to the sorting device 5 simply by putting 0 into the storage hopper 6, and it is possible to increase the efficiency by 20 to 30 times compared with the conventional case where a large number of manual inspection work is performed, and the cost is accordingly increased. Can be reduced and productivity can be significantly improved.

Further, since the worker only has to select the good product and the defective product while looking at the monitor 62, the number of personnel can be minimized and the cost can be reduced from this point as well.
In this case, since the back edges and front and back sides of the pearl oysters are constant, the confirmation work by the monitor 62 becomes easy, and the work efficiency can be improved as compared with the conventional manual alignment.

[0039]

As described above, according to the automatic pearl-cultivating Akoya shellfish selection system of the present invention, a plurality of Akoya shellfish are individually and intermittently delivered, and the delivered Akoya shellfish is predetermined. A conveying device that sequentially conveys at a speed, a front and back discriminating device that discriminates the position of the back edge of the discharged koya and shellfish, and the front and back sides, and sends them out so that the back edge of the Akoya shellfish is in the same direction and the front side faces the upper surface. , Equipped with a sorting device that sorts out the presence or absence of nuclei by irradiating the transmitted pearl oysters with a perspective line while transporting the pearl oysters, thus reducing labor costs and improving productivity. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram for explaining an automatic pearl cultivating Akoya shellfish sorting system according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a storage hopper of the system of the above embodiment.

FIG. 3 is a side view showing a carrying device of the system of the embodiment.

FIG. 4 is a schematic configuration diagram of a front / back discriminating apparatus of the system of the embodiment.

FIG. 5 is a plan view showing a main part of the apparatus according to the embodiment.

FIG. 6 is a sectional side view of the apparatus according to the embodiment.

FIG. 7 is a rear view of the front and back feeding mechanism.

FIG. 8 is a diagram showing a general Akoya oyster adopted in the system of the above-mentioned embodiment.

[Explanation of Codes] 1 Automatic sorting system 2 Sending device 3 Conveying device 4 Front / back discriminating device 5 Sorting device 6 Storage hopper 6a Input port 6b Outlet ports 8a to 8c Passage 9 Vibrator 10 Akoya shellfish 10a Upper shell (front side) 10b Lower shell ( Back side) 10c Back edge 26 Belt conveyor 28 Belt 29 Partition plate 32 Swing frame (front and back feeding mechanism) 33 Disc table 34 Discrimination plate 55, 56 Forward feeding duct, counter feeding duct (front and back feeding mechanism) 57 Position detection sensor 58 Front and back Detection sensor 60 Belt conveyor 61 X-ray irradiation device 62 Monitor (image display means)

Claims (1)

[Claims] 1. An automatic sorting system for pearl-cultured Akoya pearl oysters that contains nuclei, wherein a delivery device that individually and intermittently delivers a large number of pearl pearl oysters that have been input, and the KOKO pearl oysters that have been delivered at a predetermined speed. A conveying device that sequentially conveys, the position of the back edge of the carried-out Akoya shellfish, and the front and back sides are distinguished, and the front and back side discriminating apparatus that sends out so that the back edges of the Akoya shellfish are in the same direction and the front side faces the upper surface. A feeding hopper having a feeding port and a feeding port for the pearl oysters, and a sorting device for sorting the presence or absence of a nucleus by irradiating the pearl oysters with a perspective line while conveying the pearl oysters. A vibrator that applies vibration to the oysters and shellfish via the storage hopper; a passage of a size that allows the oyster and shellfish to be inserted laterally and individually on the upstream side of the delivery port; and the passage outlet is intermittently opened and closed. Open / close plate It is configured with an intermittent mechanism having, the transfer device is a belt conveyor having a receiving port communicating with the delivery port of the storage hopper and having a carrying-out port communicating with the front and back discriminating device, the outer peripheral surface of the belt. It is configured by vertically arranging partition plates for individually storing the ako and shellfish, and the front and back discriminating device is provided with a rotatable table on which the ako and shellfish are placed, and above the table. Based on the detection signal fixed from the position detection sensor and the front and back detection sensor attached to the determination plate, which is fixed so that it crosses and a part of the outer peripheral edge of the oyster shell comes into contact with the transportation The table is driven to rotate so that the back edge of the Akoya oyster is approximately parallel to the discrimination plate, and the front and back of the Akoya oyster are detected based on the detection signals from the front and back detection sensors. The front and back discriminating means for discriminating, and when the front and back discriminating means determines the back side, the Akoya shell is inverted and sent out, and when it is determined to be the front side, the front and back sending mechanism for sending as it is, A sorting device includes a belt conveyor that conveys the Akoya shells sent from the front and back delivery mechanism, an X-ray irradiator that irradiates the Akoya shells that are being transferred with X-rays, and an image display unit that displays the X-ray image. The automatic sorting system for pearl cultivating Akoya oysters.