JP3231227U - Foreign matter sorting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign matter sorting system capable of reliably separating metal pieces and thereby performing good sorting by X-rays. A foreign matter sorting system 200 includes a hollow rotating cylinder 5 that is rotationally driven, and a permanent magnet body 6 in which neodymium magnets having the same magnetic poles are adjacent to each other and are connected in series via a soft iron yoke. A non-magnetic metal piece provided with a magnetic force sorting device 90, an X-ray sorting device 100 that analyzes an image captured by an X-ray detector 28 and separates foreign substances including glass from a sorting object, and a transmitting coil and a receiving coil. A metal detector 95 that separates from the object to be sorted, and a color sorter that is installed downstream of the metal detector and analyzes the color image captured by the CCD camera 41 and the image captured by near infrared rays to separate foreign matter from the object to be sorted. A device 85 is provided, and a metal detector and a color sorter are arranged between the magnetic force sorter and the X-ray sorter. [Selection diagram] Fig. 1

Description

The present invention relates to a foreign matter sorting system.

The applicant proposed a foreign matter sorting device for food (see Patent Document 1). In this foreign matter sorting device, a shape sorting device, a wind sorting device, a magnetic force sorting device, a metal detector and an X-ray detector are arranged from top to bottom, and the shape sorting device separates items other than the predetermined dimensions. A wind sorter separates hair and vinyl pieces in food, a magnetic force sorter separates metal pieces such as iron pieces, a metal detector separates non-metal pieces such as aluminum, and an X-ray detector separates glass and other pieces. Separate the stone and the piece of plastic into it.

In the conventional foreign matter sorting device, one roll around which the endless transport belt is wound is a permanent magnet, and the metal pieces mixed in the sorting object transported by the transport belt are attracted and the metal pieces moved by the traveling of the transport belt. It is a structure that scrapes off with a scraper.

In the conventional foreign matter sorting device, the metal piece sorting ability of the magnet sorting device is low, so that the metal piece moves to the X-ray detector on the downstream side. The X-ray detector depends on the accuracy of the image analysis, and may not be able to find the shadow of a fine metal piece. Therefore, there is a problem that foreign matter may remain on the object to be sorted and the value as a commercial product is lowered.

Japanese Unexamined Patent Publication No. 2005-342651

An object of the present invention is to provide a foreign matter sorting system capable of reliably separating metal pieces and satisfactorily sorting by X-rays.

The foreign matter sorting system according to the present invention is a permanent magnet body in which a hollow rotating cylinder that is driven to rotate and a neodymium magnet having the same magnetic poles adjacent to each other are connected in series via a soft iron yoke, and the inside of the rotating cylinder. A shaft hole is formed to connect the magnet body to the outside, and a shaft extending from the permanent magnet body to the left and right is provided. The permanent magnet body is inside the rotating cylinder in a state where the shaft coincides with the axis of the rotating cylinder. It is equipped with an provided magnetic force sorting device, an X-ray generator and an X-ray detector, analyzes an image captured by the X-ray detector, and selects foreign matter containing glass from a sorting object which is a food product from the magnetic force sorting device. An X-ray sorting device for separation, a metal detector provided with a transmitting coil and a receiving coil to separate non-magnetic metal pieces from the sorting object, and a color image provided downstream of the metal detector and captured by a CCD camera. The metal detector and the color are provided with a color sorter that analyzes images captured by the near-infrared magnet and separates them as foreign matter from the object to be sorted when the colors are different and when the shades of the colors are different. The sorting device is arranged between the magnetic sorting device and the X-ray sorting device.

The foreign matter sorting system according to the present invention
(A) Since a small permanent magnet body using a neodymium magnet having a kamaboko shape is used for the magnetic force sorting device, a strong magnetic field having a long arcuate magnetic field surface can be formed, and the separation performance of metal pieces can be improved.
(B) Since shaft holes (13, 13') are provided on the shafts extending from the permanent magnet body on both the left and right sides, air is sent into the rotating cylinder from one shaft hole and air is discharged from the other shaft hole. It is possible to prevent the influence of heat on the sorted object (discoloration, etc.). Further, since the performance of the permanent magnet is not deteriorated due to the temperature rise, the metal pieces can be reliably attracted and the separation ability of the metal pieces can be improved.
(C) Since the sorting ability of the metal piece of the magnet sorting device has been improved, the load of image analysis for separating the metal piece by the X-ray sorting device can be reduced, and the foreign matter (glass piece, plastic, etc.) that the magnet sorting device cannot separate can be reduced. Can be separated well.
(D) Since the color sorting device is arranged on the upstream side of the X-ray sorting device and on the downstream side of the metal detector, the burden of image analysis of the X-ray sorting device can be reduced. For example, a color sorter can be used to separate grains and insects that have the same shape but different colors. Plastic grains and grains having the same shape and the same color can be easily distinguished by an X-ray sorting device.

It is an internal structure diagram of the foreign matter sorting system by this invention. It is an internal structure diagram of the magnetic force sorting apparatus of FIG. It is a front view which shows the internal structure of the rotary cylinder of the magnetic force sorting apparatus shown in FIG. It is a perspective view of the permanent magnet body used for a rotating cylinder. It is a top view of a permanent magnet body. It is a left side view of the permanent magnet body including a rotating cylinder. It is a figure which shows the arrangement of the south pole and the north pole of a neodymium magnet. It is explanatory drawing which shows the operation of the fall prevention plate. It is a plan view and a perspective view of a metal fixing means. It is a figure which shows the internal structure of the magnet rod of a metal fixing means. It is a figure which shows the internal structure of the X-ray sorting apparatus which can be incorporated in the housing of the magnetic force sorting apparatus. It is a perspective view of the guide provided inside the X-ray sorting apparatus. It is explanatory drawing (front view) of the sub chute of an X-ray sorting apparatus. It is explanatory drawing (rear view) of the sub chute of an X-ray sorting apparatus. This is an example of an image captured by an X-ray detector. It is explanatory drawing of the air injection nozzle which performs the injection of foreign matter separation. It is explanatory drawing which shows the example which incorporated the metal detector and the X-ray sorting apparatus in the housing of the magnetic force sorting apparatus.

Hereinafter, the foreign matter sorting system according to the present invention will be described with reference to the attached drawings.

FIG. 1 is an internal structure diagram of the foreign matter sorting system 200 according to the present invention. As shown in FIG. 1, a hopper 1 and a fixed quantity supply unit 4 are provided in the uppermost stream portion. The wind power sorting device 80 that follows this separates hair, vinyl pieces, and the like by wind power. The shape sorting device 70 is provided with a two-stage wire mesh member and a vibration feeder, and passes an object to be sorted of a predetermined size, except for a shape larger than a predetermined one and a shape too small. In this embodiment, the wind power sorting device 80 is provided below the shape sorting device 70, but the wind power sorting device 80 may be provided upstream of the shape sorting device 70.

As shown in FIG. 1, the magnetic force sorting device 90 separates foreign substances of metal pieces such as iron pieces. The magnetic force sorting device 90 employs a semi-cylindrical neodymium magnet as a permanent magnet body. As a result, a strong magnetic field whose magnetic force surface is long in the axial direction along the arc shape of the rotating cylinder 5 can be formed. A metal detector 95 is incorporated in the main chute 11 below the magnetic force sorting device 90. The metal detector 95 separates a non-magnetic metal piece 22 such as an aluminum piece. The metal detector 95 has a transmitting coil and a receiving coil, and when the non-magnetic metal piece 22 passes through, the voltage of the receiving coil changes. Therefore, the sorting plate 95a is operated to remove foreign matter from the non-magnetic metal piece 22. It leads to the magnetic metal piece throwing chute 18.

As shown in FIG. 1, a metal detector 95 is incorporated downstream of the magnetic force sorter 90, and a color sorter 85 is provided downstream of the metal detector 95. The sorting object 20 exiting the main chute 11 of the magnetic force sorting device 90 enters the hopper 1 of the color sorting device 85 via a transport belt (not shown). The sorting object 20 received by the hopper 1 is sent to the sorting unit 40 by the feeder 120. The sorting unit 40 analyzes the color image captured by the CCD camera 41 and the image captured by the NIR (near infrared) camera 42, and separates the sorted objects having the same shape as foreign substances if the colors are different. The color sorter 85 detects foreign matter by using near-infrared light in addition to white light. As a result, the sorting object 20 can be sorted with high accuracy. For example, when the object to be sorted 20 is chia seeds, the chia seeds are brown, while the mixed wood chips are gray, so they are detected by the color images of the white light source 43 and the CCD camera 41, and blown off by the air injection nozzle 45 to separate them. To do. On the other hand, since the insect manure is brown, it cannot be distinguished from the chia seed in the color image of the white light source 43 and the CCD camera 41, but it is received in gray in the image of the NIR (near infrared) camera 42, so that it is called the chia seed. It is distinguished and blown off by the air injection nozzle 45 to separate it. The foreign matter is blown off, sent out to the foreign matter throwing chute 47, and collected in the foreign matter receiving box 48. The non-defective product is sent to the hopper 1 of the X-ray sorting apparatus 100 via the non-defective product input chute 49 and the transport belt (not shown).

As shown in FIG. 1, the X-ray sorting device 100 is provided on the downstream side of the color sorting device 85. The X-ray sorting device 100 includes an X-ray generator 27 and an X-ray detector 28, and analyzes an image captured by the X-ray detector 28 to separate foreign substances including glass. The sorting object 20 is sent out by the belt 111 to the left in the drawing. When the image of the X-ray detector 28 is analyzed and a foreign matter is detected, the sorting plate 115 is lowered, and the foreign matter is sent out to the foreign matter chute 25 and collected in the foreign matter receiving box 38. In the case of non-defective products, since the sorting plate 115 remains raised, the non-defective products are collected from the non-defective product throwing chute 29 into the non-defective product receiving box 26.

FIG. 2 shows the internal structure of the magnetic force sorting device 90 of FIG. The magnetic force sorting device 90 separates metal pieces 21 such as iron pieces with a semi-cylindrical permanent magnet 6. The separated metal pieces 21 are sent to the metal piece throwing chute 10 and collected in the metal piece receiving box 36. The magnetic force sorting device 90 is supplied with the sorting object that has passed through the shape sorting device 70, and as shown in FIG. 2, a hopper 1 and a fixed quantity supply mechanism 4 may be arranged. The hopper 1 is provided on the roof portion and houses the object to be sorted. The fixed quantity supply mechanism 4 is composed of a pair of rollers 2 and 3, and supplies the sorting object 20 in fixed quantities above the rotary cylinder 5. The rollers 2 and 3 are provided so as to face each other, and the objects to be sorted by the hopper 1 are grasped by the blades and dropped above the rotary cylinder 5. The rotary cylinder 5 is made of a stainless steel drum that is resistant to wear and has a thin thickness (thickness of 1 mm or less). The rotary cylinder 5 is hollow, and a permanent magnet body 6 is provided inside. The permanent magnet body 6 attracts the metal piece 21 contained in the object to be sorted 20 to the surface of the rotary cylinder 5 and separates the metal piece 21. Examples of foods to be sorted include sesame seeds, rice, and flour grains.

As shown in FIG. 2, a fall prevention plate 8 is provided behind the upper portion of the rotary cylinder 5 in the magnetic force sorting device 90, and a separation adjustment plate 7 is provided in front of the lower portion of the rotary cylinder 5. The fall prevention plate 8 receives the sorting object 20 from the fixed quantity supply mechanism 4 and slides and rotates in the rotation direction of the rotary cylinder 5 to send the sorting target 20 to the front side of the rotary cylinder 5. When the metal piece 21 having magnetism such as iron attracted to the rotating cylinder 5 rotates and the metal piece 21 attracted to the rotating cylinder 5 is separated from the permanent magnet body 6, the magnetic force is not applied and the metal piece 21 falls downward by its own weight. The food (non-defective) sorting object 20 that is not affected by the magnetic force falls on the main chute 11 on the lower front side of the rotary cylinder 5. The angle of the separation adjusting plate 7 can be adjusted, and the good product sorting object 20 that falls forward and the metal piece 21 that falls from directly below the rotating cylinder 5 to the rear after being attracted to the rotating cylinder 5 To separate.

FIG. 3 is a front view showing the internal configuration of the rotary cylinder 5 in the magnetic force sorting device 90 shown in FIG. The rotary cylinder 5 is constantly rotated by a belt 51 driven by a motor 30. The permanent magnet body 6 is fixed so that the shaft 31 is installed so as to coincide with the axis of the rotary cylinder 5 and the magnet faces the side where the sorting object 20 of the rotary cylinder 5 falls (in the upper right direction in FIG. 1). The magnet. Both ends of the shaft 31 are supported by bearings. The magnetic field is generated long along the longitudinal direction (left-right direction) of the rotating cylinder 5. Air can be sent to the inside of the rotary cylinder 5 by the fan 12. After this air enters the inside of the rotary cylinder 5 through one of the shaft holes 13 formed in the shaft 31 of the permanent magnet body 6, the air inside the rotary cylinder 5 is formed in the shaft of the permanent magnet body 6. It goes out through the other shaft hole 13'. The permanent magnet body 6 can be cooled by this air flow. In addition to the shaft holes 13 and 13', an air cooling means 16 can be provided. The air cooling means 16 is composed of a fan 12 and an air flow path 19 of shaft holes 13 and 13'.

FIG. 4 is a perspective view of the permanent magnet body 6 used for the rotary cylinder 5. The length of the permanent magnet body 6 is about 90 cm. A plurality of neodymium magnets 32 are sandwiched between fan-shaped soft iron yokes 33 attached to a shaft 31. A balancer 52 with three connecting rods is attached to the opposite side of the neodymium magnet 32. The neodymium magnet 32 is formed in a semi-cylindrical shape, and is attached so that the curved surface of the top of the semi-cylindrical shape faces the inner surface of the rotary cylinder 5.

FIG. 5 is a plan view of the permanent magnet body 6. Shaft holes 13 and 13'are formed in the shaft 31, and air enters the inside of the rotary cylinder 5 from one shaft hole 13 and air flows out from the other shaft hole 13', so that the inside of the rotary cylinder 5 is cooled. be able to. Therefore, the shaft holes 13 and 13'are the air flow paths 19. Each of the neodymium magnets 32 is sandwiched between the soft iron yokes 33. Fixing members 34, 34'are provided on the left and right, and the whole is fixed with bolts. Although not limited to this, the neodymium magnet 32 has a thickness of about 12.5 mm, and the soft iron yoke 33 has a thickness of about 3 mm. The width including the fixing members 34 and 34'is about 450 mm. The diameter of the shaft 31 is about 40 mm. The diameter of the rotary cylinder 5 is about 22 cm, but the width (horizontal direction) of the rotary cylinder 5 is as long as about 45 cm, so that the object to be sorted 20 falls toward the main chute 11 like a strip-shaped waterfall.

FIG. 6 is a left side view of the permanent magnet body 6 including the rotary cylinder 5. The diameter of the rotary cylinder 5 is about 220 mm. The neodymium magnet 32 has a plate shape, one of which is the surface of the south pole and the other of which is the surface of the north pole. Its outer shape is semi-cylindrical. The outer circumference L of the curved surface of the top is lengthened to match the circumference of the rotary cylinder 5. The arcuate angle of the neodymium magnet 32 is, for example, about 110 degrees. The soft iron yoke 33 is plate-shaped and fan-shaped, has holes, and is attached to the shaft 31. As shown in FIG. 6, when the rotating cylinder 5 rotates and the magnetic force is not applied to the metal piece 21 attracted to the rotating cylinder 5, the metal piece 21 falls downward with a trajectory as shown by a dotted line. The dropped metal piece 21 is attracted to the metal fixing means 21.

FIG. 7 is a diagram showing an arrangement of S poles and N poles of the neodymium magnet 32. Neodymium magnets 32 are coupled in series so that adjacent magnetic poles are the same. With such an arrangement, the magnetic field lines 57 are generated toward the outside of the rotary cylinder 5 and along the axial direction. The strength of the magnetic force is about 1.4 Tesla or more.

FIG. 8 is an explanatory diagram showing the operation of the fall prevention plate 8. In (A), the object to be sorted 20 is dropped on the upper part of the rotary cylinder 5, and a part of the object to be sorted is conveyed forward because the rotary cylinder 5 is rotating, but is received by the fall prevention plate 8. The selected object 20 may be stored without being able to climb the uphill of the rotary cylinder 5. (B) shows that the fall prevention plate 8 is rotated by the feeding means 15 and the sorting object 20 is fed forward. The rotation speed is the same as the rotation speed of the rotary cylinder 5. (C) indicates that the fall prevention plate 8 is returned to its original position. The delivery means 15 can be composed of a stepping motor and an arm. The rotation control of the rollers 2 and 3 of the fixed quantity supply mechanism 4 is divided into a time zone in which the fall prevention plate 8 is rotated and a time zone in which the rotation is stopped, and is driven by intermittent rotation. The rollers 2 and 3 are divided into a time for rotating and dropping a predetermined amount of the sorting object 20 and a time for stopping and not dropping the sorting object 20, and this is repeated. The fall prevention plate 8 moves during the time when the rotation of the rollers 2 and 3 is stopped. The fall prevention plate 8 returns to the original position after sending the sorting object 20 forward.

FIG. 9 is a plan view and a perspective view of the metal fixing means 50. The metal piece fixing means 50 is composed of a plurality of magnet rods 53. Neodymium magnets 53a are arranged inside the magnet rod 53 so that the same poles face each other. As a result, a long magnetic field can be generated around the circumference along the length direction. Since the neodymium magnet 53a is vulnerable to wear, the outside is covered with a stainless steel tube 53b to protect it. When the neodymium magnet 53a is pulled out from the stainless steel tube 53b, the magnetic force of the stainless steel tube 53b disappears, so that the attracted metal falls apart. Therefore, it is not necessary to scrape off foreign matter (magnetic metal, iron pieces, etc.), and the foreign matter can be easily collected after the operation is completed.

FIG. 10 is a diagram showing an internal configuration of the magnet rod 53 of the metal fixing means 50. (A) is an example in which the magnet rod 24 is composed of an electromagnet. (B) is an example composed of a neodymium magnet. The magnet rod 53 may be composed of either (A) or (B). When composed of an electromagnet, foreign matter can be collected in a saucer with a single operation of a switch. Since the metal piece fixing means 50 is provided on the metal piece throwing chute 10, the separated and dropped metal piece 21 can be easily collected after the operation is completed.

FIG. 11 is a diagram showing an internal configuration of the X-ray sorting device 100 that can be incorporated into the housing 9 of the magnetic force sorting device 90. The X-ray sorting device 100 includes a guide 35, a plurality of subchutes 14 provided under the guide 35, an X-ray generator 27, an X-ray detector 28, and a plurality of (four in this embodiment) air injection nozzles. 17. A plurality of (4 in this embodiment) X-ray detection foreign matter throwing chutes 25, an X-ray detection foreign matter receiving box 38, and a non-defective product receiving box 26 are provided. Glass, stones, plastic pieces, etc. detected by the X-ray detector 28 are collected in the X-ray detection foreign matter receiving box 38. As shown in FIG. 11, the depth width (front-back direction) of the sub chute 14 is narrower than the depth width of the main chute 11. This is because the object to be sorted 20 is passed near the air injection nozzle 17 to be blown off satisfactorily. Such an X-ray sorting device does not convey the sorting object as shown in FIG. 1 by a belt, but drops it in a plurality of subshoots and determines a foreign substance by image analysis of an X-ray detector. The foreign matter is separated by the air of the air injection nozzle. Therefore, it can be connected to the lower side of the main chute of the magnetic sorting device.

As shown in FIG. 11, the X-ray generator 27 includes a filament and a target, and X-rays are emitted from the target. The X-ray detector 28 is a sensor that detects X-rays, and images a falling object 20 to be sorted. The X-ray detector 28 can detect metal pieces, but since they are separated by the magnetic force sorting device 90 and the metal detector 95, it mainly detects glass, stones, plastic pieces, and the like. Although not shown, a processing unit for analyzing an image is connected to the X-ray detector 28. If the processing unit determines that the foreign matter has fallen by image analysis, it outputs a signal for driving the air injection nozzle 17 corresponding to the foreign matter.

FIG. 12 is a perspective view of the guide 35 of the X-ray sorting apparatus 100. Since the main chute 11 has a left-right length of about 45 cm, it is divided into four sub chute 17, and four air injection nozzles are also provided. The upper narrowing plate determines the narrowing in the left-right direction, and by adjusting the height to raise it, the left-right width of each shoot becomes wider, and by lowering the height, the left-right width of each shoot becomes wider. It gets narrower. The lower narrowing plate determines the narrowing down in the front-rear direction, and by adjusting the height to raise it, the front-back width of each chute becomes wider, and by lowering the height, the front-rear width of each chute becomes narrower. ..

FIG. 13 is an explanatory view (front view) of the sub chute 17 of the X-ray sorting apparatus 100. In this embodiment, the subshoot 14 is formed of four subshoots 14a, a second subshoot 14b, a third subshoot 14c, and a fourth subshoot 14d. The X-ray detector 28 is provided horizontally on the front side of the sub chute 14 so as to intersect the sub chute 14. Further, the first air injection nozzle 17a, the second air injection nozzle 17b, and the third air injection nozzle 17c correspond to the first sub chute 14a, the second sub chute 14b, the third sub chute 14c, and the fourth sub chute 14d. An air injection nozzle 17 including a fourth air injection nozzle 17d is provided. The wide main chute 11 was narrowed down by the guide 35 so that foreign matter detected by X-rays could be easily blown off by the air injection nozzle, and four sub chute 14 following the guide 35 were formed. The sorting object 20 that has not been blown off by the air injection nozzle 17 falls directly below and is collected in the non-defective product receiving box 26.

FIG. 14 is an explanatory view (rear view) of the sub chute 14 of the X-ray sorting apparatus 100. Behind the subchute 14, an X-ray generator 27 is provided so as to intersect the subchute 14. Below the X-ray generator 27, the first X-ray detection foreign matter throwing chute 25a, corresponding to the first subchute 14a, the second subchute 14b, the third subchute 14c, and the fourth subchute 14d, respectively. An X-ray detection foreign matter throwing chute 25 including a second X-ray detection foreign matter throwing chute 25b, a third X-ray detecting foreign matter throwing chute 25c, and a fourth X-ray detecting foreign matter throwing chute 25d is provided. The X-ray detection foreign matter 24 blown off by the air injection nozzle 17 is sent to the X-ray detection foreign matter throwing chute 25, and the X-ray detection foreign matter 24 is collected in the X-ray detection foreign matter receiving box 38.

FIG. 15 is an example of an image captured by the X-ray detector 28. The first subchute 14a and the second subchute 14b image the falling non-defective object 20, while the third subchute 14c and the fourth subchute 14d include glass, stone, or plastic pieces. The X-ray detection foreign matter 24 of the above is imaged. The processing unit (not shown) analyzes this image and detects the X-ray detection foreign matter 24.

FIG. 16 is an explanatory view for injecting the air injection nozzle 17 corresponding to the image of FIG. When the processing unit (not shown) detects that there is a foreign substance in the third subchute 14c and the fourth subchute 14d, it outputs a signal to the third air injection nozzle 17c and the fourth air injection nozzle 17d to shorten the nozzle. Air is injected from the time "closed" to "open". Compressed air is continuously sent from the compressor 19 to the air injection nozzles 17 of the first air injection nozzle 17a, the second air injection nozzle 17b, the third air injection nozzle 17c, and the fourth air injection nozzle 17d. Therefore, the nozzle can be opened continuously.

FIG. 17 is an explanatory diagram showing an example in which a metal detector and an X-ray sorting device are incorporated in a housing of a magnetic force sorting device. Unlike the configuration of FIG. 1, since the X-ray sorting device is not connected by a conveyor belt, the installation area is small and the system can be constructed even in a narrow place.

The present invention is suitable as a foreign matter sorting system capable of reliably separating metal pieces and satisfactorily sorting foreign matter by X-ray.

1 Hopper 2, 3 Roller 4 Quantitative supply mechanism 5 Rotating cylinder 6 Permanent magnet body 7 Separation adjustment plate 8 Fall prevention plate 9 Housing 10 Metal piece throwing chute 11 Main chute 12 Fan 13, 13'Shaft hole (air passage)
14 Subchute 14a 1st subchute 14b 2nd subchute 14c 3rd subchute 14d 4th subchute 15 Sending means 16 Air cooling means 17 Air injection nozzle 17a 1st air injection nozzle 17b 2nd air injection nozzle 17c 3rd air injection Nozzle 17d 4th air injection nozzle 18 Non-magnetic metal piece throwing chute 19 Compressor 20 Sorting object 21 Metal piece 22 Non-magnetic metal piece 23 Vinyl piece 24 X-ray detection Foreign matter (glass or stone or plastic piece, etc.)
25 X-ray detection Foreign matter throwing chute 25a 1st X-ray detection Foreign matter throwing chute 25b 2nd X-ray detection Foreign matter throwing chute 25c 3rd X-ray detection Foreign matter throwing chute 25d 4th X-ray detection Foreign matter throwing chute 26 Good product receiving box 27 X-ray generator 28 X Line detector 29 Good product throwing chute 30 Motor 31 (Permanent magnet body) shaft 32 Neodymium magnet 33 Soft iron yoke 34, 34'Fixing member 35 Guide 36 Metal piece receiving box 37 Non-magnetic metal piece receiving box 38 X-ray detection Foreign matter receiving box 40 Sorting unit 41 CCD camera 42 NIR camera 43 White light source 44 Near infrared light source 47 Foreign matter throwing chute 48 Foreign matter receiving chute 49 Good product receiving chute 50 Metal fixing means 51 Belt 52 Balancer 53 Magnet rod 53a Neodymium magnet 53b Stainless steel tube 57 Magnetic field line 70 Shape sorting Equipment 80 Wind sorting device 85 Color sorting device 90 Magnetic sorting device 95 Metal detector 95a Sorting board 100 X-ray sorting device 115 Sorting board 200 Foreign matter sorting system

Claims (1)

A permanent magnet body is formed by connecting a hollow rotating cylinder that is driven to rotate and a neodymium magnet with the same magnetic poles adjacent to each other in series via a soft iron yoke, and a shaft hole that connects the inside and outside of the rotating cylinder. A magnetic force sorting device in which the permanent magnet body is provided inside the rotating cylinder in a state where the shaft is provided with a shaft extending from the permanent magnet body to the left and right and the shaft coincides with the axis of the rotating cylinder.
An X-ray sorter equipped with an X-ray generator and an X-ray detector, which analyzes an image captured by the X-ray detector and separates foreign matter containing glass from a food sorting object from the magnetic force sorting device.
A metal detector equipped with a transmitting coil and a receiving coil to separate non-magnetic metal pieces from the sorting object.
The object to be sorted as a foreign substance when the color image captured by the CCD camera and the image captured by the near infrared ray are analyzed and the colors are different or the shade of the color is different, which is provided downstream of the metal detector. Equipped with a color sorter that separates from
A foreign matter sorting system, wherein the metal detector and the color sorting device are arranged between the magnetic force sorting device and the X-ray sorting device.

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