JP7431480B1 - Sorting device - Google Patents

Abstract

[Problem] To appropriately sort resin bottles from objects to be sorted. SOLUTION: In a sorting device 10, a sorting conveyor 44 conveys recovered items 12. Further, the NIR sensor 60 detects the plastic bottle 16 from the collected material 12, and the third crank mechanism 70 sorts out the plastic bottle 16A from the collected material 12. Here, the flapper 50 of the third crank mechanism 70 presses the plastic bottle 16 to separate it from the collected materials 12. Therefore, the PET bottles 16 can be appropriately sorted from the collected materials 12. [Selection diagram] Figure 5

Description

The present invention relates to a sorting device that sorts resin bottles from objects to be sorted.

In the sorting device described in Patent Document 1 below, a first photoelectric sensor discriminates waste PET bottles from a collection container, and an air injection nozzle sorts the waste PET bottles from the collection container by jetting pulsed air.

Here, it is preferable that such a sorting device be able to appropriately sort waste PET bottles from a collection container.

JP 2019-171332 Publication

The present invention takes the above-mentioned facts into consideration and aims to provide a sorting device that can appropriately sort resin bottles from objects to be sorted.

A sorting device according to a first aspect of the present invention is provided with a conveyance mechanism that conveys sorting objects including resin bottles, a discrimination mechanism that discriminates resin bottles from the sorting objects, and a pressing member, and the discrimination mechanism discriminates A sorting mechanism is provided in which the pressing member presses the resin bottles to separate them from objects to be sorted.

The sorting device according to the second aspect of the present invention includes a transport mechanism that transports objects to be sorted including resin bottles, and a discrimination device that discriminates resin bottles that contain objects from the objects to be sorted and resin bottles that do not contain objects. a mechanism, and a sorting mechanism that selects resin bottles containing the contents determined by the discriminating mechanism from the sorting targets, and selects resin bottles that do not contain the contents determined by the discriminating mechanism from the sorting targets. Be prepared.

A sorting device according to a third aspect of the present invention includes a conveyance mechanism that conveys a sorting object including a resin bottle, and is provided in the conveyance mechanism, and foreign matter in the sorted object conveyed by the conveyance mechanism is passed through and removed. The present invention includes a removal port, a discrimination mechanism that discriminates resin bottles from objects to be sorted, and a sorting mechanism that sorts resin bottles discriminated by the discrimination mechanism from objects to be sorted.

A sorting device according to a fourth aspect of the present invention is the sorting device according to any one of the first to third aspects of the present invention, and includes a vibration mechanism that vibrates the transport mechanism.

In the sorting device according to the first aspect of the present invention, the conveyance mechanism conveys objects to be sorted including resin bottles. Further, the discrimination mechanism discriminates resin bottles from the objects to be sorted, and the sorting mechanism sorts the resin bottles discriminated by the discrimination mechanism from the objects to be sorted.

Here, the pressing member of the sorting mechanism presses the resin bottles to separate them from the objects to be sorted. Therefore, the resin bottles can be appropriately sorted from the objects to be sorted.

In the sorting device according to the second aspect of the present invention, the conveyance mechanism conveys objects to be sorted including resin bottles.

Here, the discrimination mechanism discriminates from the sorting targets into resin bottles that contain the contents and resin bottles that do not contain the contents. Further, the sorting mechanism selects resin bottles that contain the contents discriminated by the discrimination mechanism from the objects to be sorted, and the sorting mechanism sorts resin bottles that do not contain the objects judged by the discrimination mechanism from the objects to be sorted. Therefore, the resin bottles can be appropriately sorted from the objects to be sorted.

In the sorting device according to the third aspect of the present invention, the transport mechanism transports the objects to be sorted including resin bottles. Further, the discrimination mechanism discriminates resin bottles from the objects to be sorted, and the sorting mechanism sorts the resin bottles discriminated by the discrimination mechanism from the objects to be sorted.

Here, the foreign matter in the object to be sorted that is transported by the transport mechanism is passed through the removal port of the transport mechanism and removed. Therefore, the discrimination mechanism can appropriately discriminate the resin bottles from the sorting objects, and can appropriately sort the resin bottles from the sorting objects.

In the sorting device according to the fourth aspect of the present invention, the vibration mechanism vibrates the conveyance mechanism. Therefore, it is possible to vibrate the sorting target that is transported by the transport mechanism.

FIG. 1 is a perspective view of a sorting device according to an embodiment of the present invention, seen diagonally from the rear left. FIG. 1 is a cutaway perspective view of a sorting device according to an embodiment of the present invention, seen diagonally from the front left. FIG. 3 is a cross-sectional view of the removal mechanism of the sorting device according to the embodiment of the present invention, seen from the rear. FIG. 2 is a plan view from above showing the main body mechanism of the sorting device according to the embodiment of the present invention. FIG. 2 is a plan view from above showing details of the main body mechanism of the sorting device according to the embodiment of the present invention. (A) and (B) are perspective views of the crank mechanism of the sorting device according to the embodiment of the present invention, viewed diagonally from the front left, where (A) shows the normal state, and (B), Shown when in operation. (A) to (D) are top views showing the crank mechanism of the sorting device according to the embodiment of the present invention, in which (A) shows the normal state, and (B) shows the first operation. (C) shows the second operating stage and (D) shows the third operating stage. (A) and (B) are top views showing the NIR sensor of the sorting device according to the embodiment of the present invention, with (A) showing the outline and (B) showing the details. There is.

FIG. 1 shows a sorting device 10 according to an embodiment of the present invention in a perspective view as seen diagonally from the rear left, and FIG. 2 shows a cutaway perspective view of the sorting device 10 seen diagonally from the front left. is shown. In the drawings, the front of the sorting device 10 is indicated by an arrow FR, the right side of the sorting device 10 is indicated by an arrow LH, and the upper direction is indicated by an arrow UP.

The sorting device 10 according to the present embodiment sorts collected materials 12 (see FIG. 2), and the collected materials 12 are collected as waste from vendors such as convenience stores. The collected items 12 include cans 14 made of metal (particularly made of iron and aluminum), plastic bottles 16 made of PET (polyethylene terephthalate) resin as resin bottles (empty plastic bottles 16A that do not contain contents (residual liquid), etc.). Other beverage containers 18 are mixed, such as a storage PET bottle 16B for storing objects), a glass bottle, a beverage container made of resin other than PET, and a paper pack. The collected material 12 contains foreign objects 20 (see FIG. 3) such as batteries, lighters, and glass pieces, and the foreign objects 20 have a smaller volume than cans 14, plastic bottles 16, and other beverage containers 18. ing.

As shown in FIGS. 1 and 2, a removal mechanism 22 is provided at the rear of the sorting device 10, and the collected material 12 is supplied to the removal mechanism 22 from above.

Removal conveyors 24 (see FIG. 3) constituting a transport mechanism are provided on the left and right sides of the removal mechanism 22, and the removal conveyors 24 extend in the front-rear direction. The removal conveyor 24 is provided with an endless belt-shaped removal belt 24A, which extends in the front-rear direction. The upper part of the removal belt 24A constitutes the upper surface of the removal conveyor 24, and when the removal conveyor 24 is operated, the upper part of the removal belt 24A is moved to the front side. Further, the width direction of the removal conveyor 24 (including the removal belt 24A) is inclined by, for example, 20 degrees in a direction toward the bottom as it goes outward in the left-right direction of the removal mechanism 22.

A substantially rectangular plate-shaped support plate 26 is provided above the removal conveyor 24 and at a position outside the removal mechanism 22 in the left-right direction, and the support plate 26 is supported by the removal conveyor 24 . The support plate 26 extends in the front-back direction and is arranged perpendicularly to the top surface of the removal conveyor 24, and a removal port 28 is formed between the support plate 26 and the top surface of the removal conveyor 24. There is. The distance between the support plate 26 and the top surface of the removal conveyor 24 can be adjusted, thereby making it possible to adjust the width of the removal port 28.

A foreign matter discharge path 30 is provided outside the removal mechanism 22 in the left and right direction of the removal conveyor 24. It is slanted in a downward direction. A foreign matter collection box 32 is disposed below the lower end of the foreign matter discharge path 30, and the inside of the foreign matter collection box 32 is open upward.

When the collected material 12 (cans 14, plastic bottles 16, other beverage containers 18) is supplied to the removal mechanism 22, the collected material 12 is supported by the upper part of the removal belt 24A of the removal conveyor 24 and the support plate 26. , whose longitudinal direction (vertical direction) is oriented in the front-rear direction, and is conveyed to the front side by the upper part of the removal belt 24A. Further, the foreign matter 20 in the collected material 12 is dropped from the removal port 28 between the upper surface of the removal conveyor 24 and the support plate 26, and after being removed from the collected material 12, is flowed down the foreign material discharge path 30. , and are dropped into the foreign matter collection box 32 and collected.

A lifting mechanism 34 is provided on the front side of the removing mechanism 22.

Rising boxes 36 having a substantially rectangular parallelepiped box shape are provided on the left and right sides of the ascending mechanism 34, and the ascending boxes 36 extend upward as they move toward the front side, and the interior thereof faces upwardly. is open to the public. The rear end of the ascending box 36 is arranged in front of and below the removal conveyor 24 of the removal mechanism 22, and the collected objects 12 conveyed to the front by the removal conveyor 24 are dropped into the rear end of the ascending box 36. will be supplied.

A rising conveyor 38 constituting a transport mechanism is provided at the lower part of the rising box 36, and the rising conveyor 38 extends along the extending direction of the rising box 36. An endless belt-like ascending belt 38A is provided around the ascending conveyor 38, and the ascending belt 38A extends along the extending direction of the ascending conveyor 38. A plurality of rectangular plate-shaped ascending plates 38B are fixed to the outer peripheral surface of the ascending belt 38A, and the ascending plates 38B are arranged perpendicularly to the outer circumferential surface of the ascending belt 38A and the circumferential direction of the ascending belt 38A. The plurality of rising plates 38B are arranged at equal intervals in the circumferential direction of the rising belt 38A, and the rising plates 38B are arranged perpendicularly to the outer peripheral surface of the rising belt 38A and the circumferential direction of the rising belt 38A. The upper portion of the ascending belt 38A is exposed in the ascending box 36, and when the ascending conveyor 38 is operated, the upper portion of the ascending belt 38A (including the ascending plate 38B) is moved diagonally upward and forward.

When the collected material 12 (cans 14, plastic bottles 16, and other beverage containers 18) is supplied to the ascending mechanism 34 (inside the ascending box 36), the collected material 12 is raised with the upper part of the ascending belt 38A of the ascending conveyor 38. It is supported by the left and right walls of the box 36 and the rising plate 38B, and its longitudinal direction (vertical direction) is oriented in the extending direction of the rising belt 38A, and the upper part of the rising belt 38A and the rising plate 38B direct the front diagonal direction. transported to the upper side. The distance between the rising plates 38B in the rising belt 38A is made slightly larger than the longitudinal dimension of the collected objects 12, and one collected object 12 is conveyed by one rising plate 38B, so that the collected objects 12 are transported one by one at intervals.

A main body mechanism 40 (see FIGS. 4 and 5) is provided on the front side of the front end (upper end) of the lifting mechanism 34.

A sorting path 42 is provided on the left and right sides of the main body mechanism 40, and the sorting path 42 extends in the front-rear direction and is open to the rear side. The front end (upper end) of the ascending conveyor 38 is disposed at the rear end of the sorting path 42, and the recovered items 12 conveyed diagonally upward by the ascending conveyor 38 fall onto the rear end of the sorting path 42. and supplied.

A sorting conveyor 44 constituting a transport mechanism is provided below the sorting path 42, and the sorting conveyor 44 extends in the front-rear direction. The sorting conveyor 44 is provided with a sorting belt 44A in the form of an endless belt, and the sorting belt 44A extends in the front-back direction. The upper part of the sorting belt 44A constitutes the lower surface of the sorting path 42, and when the sorting conveyor 44 is operated, the upper part of the sorting belt 44A is moved to the front side.

When the collected materials 12 (cans 14, plastic bottles 16, and other beverage containers 18) are supplied to the main body mechanism 40 (sorting path 42), the collected materials 12 are transferred to the upper part of the sorting belt 44A of the sorting conveyor 44 and the sorting path. 42, the longitudinal direction (vertical direction) is oriented in the front-rear direction, and the upper part of the sorting belt 44A conveys the paper to the front side. Furthermore, since the collected items 12 are conveyed one by one at intervals on the ascending conveyor 38, the collected items 12 are conveyed one by one at intervals on the sorting conveyor 44 as well.

A metal sensor 46 serving as a metal discrimination mechanism is fixed to the upper surface of the rear part of the sorting path 42, and the metal sensor 46 detects that the recovered material 12 conveyed by the sorting conveyor 44 is metal, and It is detected that the collected object 12 is a can 14.

A first crank mechanism 48 (see FIGS. 6(A) and 7(A)) as a metal sorting mechanism is provided on the inside of the main body mechanism 40 in the left-right direction of the sorting path 42 on the front side of the metal sensor 46. The first crank mechanism 48 is provided with a flapper 50 having an L-shaped cross section and a plate shape as a pressing member. The base end of the flapper 50 is rotatably supported, and the rotation center axis of the flapper 50 is parallel to the vertical direction. The proximal end portion of the flapper 50 is arranged perpendicularly in the left-right direction and constitutes the side surface of the sorting path 42, and the distal end portion of the flapper 50 is bent toward the opposite side to the sorting path 42, and is arranged vertically in the left-right direction to form the side surface of the sorting path 42. placed perpendicular to the direction. One end of a connecting rod 52 is rotatably connected to the proximal end portion of the flapper 50 on the side opposite to the sorting path 42 . One end of a crank arm 54 is rotatably connected to the other end of the connecting rod 52, and the other end of the crank arm 54 is rotatably supported. When the first crank mechanism 48 was operated, the crank arm 54 was rotated around the other end, and the flapper 50 was rotated toward the sorting path 42 via the connecting rod 52 (FIG. 6(B) ), see FIGS. 7B and 7C), and then rotated (returned) to the initial position (see FIGS. 6A and 7D and 7A).

When the metal sensor 46 detects that the collected object 12 is a can 14, the first crank mechanism 48 is actuated and the flapper 50 is moved when the can 14 is conveyed on the side of the first crank mechanism 48. When the can 14 is rotated toward the sorting path 42 side, the can 14 is pressed by the proximal end portion of the flapper 50 toward the opposite side of the sorting path 42 from the first crank mechanism 48, and is sorted from the collected material 12.

A can discharge passage 56 is provided on the opposite side of the sorting passage 42 from the first crank mechanism 48 , and the cans 14 pressed by the flapper 50 of the first crank mechanism 48 are dropped down the can discharge passage 56 . A can collection bag 58 is arranged below the can discharge path 56, and the cans 14 that have fallen down the can discharge path 56 are dropped into the can collection bag 58 and collected.

Around the sorting path 42, in front of the first crank mechanism 48, an NIR sensor 60 (near infrared sensor, see FIGS. 8A and 8B) as a discrimination mechanism is installed. The NIR sensor 60 is provided with a light source section 60A, which is disposed on one side of the sorting path 42 and emits near-infrared rays. The NIR sensor 60 is provided with a light receiving section 60B, and the light receiving section 60B is arranged on the other side of the sorting path 42 and receives near-infrared light emitted by the light source section 60A. When the collected items 12 (plastic bottles 16, other beverage containers 18) are transported by the sorting conveyor 44, the light source section 60A emits near-infrared rays toward the collected items 12, and the light receiving section 60B detects the collected items 12. Receives the transmitted near-infrared rays. The light source section 60A and the light receiving section 60B face each other in a direction inclined with respect to the left-right direction, and the direction in which the light source section 60A emits near-infrared rays toward the collected object 12 is such that the longitudinal direction is directed in the front-back direction. It is inclined with respect to the radial direction of the recovered material 12 being conveyed. A spectroscopic analyzer 62 is connected to the light receiving section 60B by an optical fiber 62A, and the spectroscopic analyzer 62 spectrally analyzes the near infrared rays received by the light receiving section 60B to determine the material of the collected material 12 through which the near infrared rays have passed. At the same time, the absorbance of water in the collected material 12 is detected. Thereby, the NIR sensor 60 detects that the recovered object 12 through which the near infrared rays have passed is the empty PET bottle 16A, and that the recovered object 12 is the housed PET bottle 16B.

A second crank mechanism 64 as a sorting mechanism (empty sorting mechanism) is provided inside the main body mechanism 40 in the left-right direction of the sorting path 42 on the front side of the NIR sensor 60 (light source section 60A and light receiving section 60B). The two-crank mechanism 64 has a similar configuration to the first crank mechanism 48. When the NIR sensor 60 detects that the collected object 12 is an empty PET bottle 16A, the second crank mechanism 64 is activated when the empty PET bottle 16A is transported on the side of the second crank mechanism 64. As the flapper 50 is rotated toward the sorting path 42, the empty plastic bottle 16A is pushed by the proximal end portion of the flapper 50 toward the side opposite to the second crank mechanism 64 of the sorting path 42, and the recovered material is removed. Selected from 12.

An empty discharge path 66 is provided on the opposite side of the sorting path 42 from the second crank mechanism 64, and the empty PET bottle 16A pressed by the flapper 50 of the second crank mechanism 64 is dropped down the empty discharge path 66. Ru. An empty collection bag 68 is disposed below the empty discharge path 66, and the empty PET bottles 16A that have fallen down the empty discharge path 66 are dropped into the empty collection bag 68 and collected.

A third crank mechanism 70 as a sorting mechanism (accommodation sorting mechanism) is provided inside the main body mechanism 40 in the left-right direction of the sorting path 42 on the front side of the second crank mechanism 64. 1 has the same configuration as the crank mechanism 48. When the NIR sensor 60 detects that the collected object 12 is the stored PET bottle 16B, the third crank mechanism 70 is activated when the stored PET bottle 16B is transported on the side of the third crank mechanism 70. As the flapper 50 is rotated toward the sorting path 42 side, the stored PET bottle 16B is pressed by the proximal end portion of the flapper 50 to the side opposite to the third crank mechanism 70 of the sorting path 42, and the recovered material is Selected from 12.

A storage/discharge path 72 is provided on the opposite side of the sorting path 42 from the third crank mechanism 70 , and the storage PET bottles 16</b>B pressed by the flapper 50 of the third crank mechanism 70 are dropped down the storage/discharge path 72 . Ru. A storage and collection bag 74 is disposed below the storage and discharge path 72, and the empty PET bottles 16A that have fallen down the storage and discharge path 72 are dropped into the storage and collection bag 74 and collected.

Another discharge passage 76 is provided on the front side of the main body mechanism 40 (sorting passage 42), and the other discharge passage 76 is inclined downward as it goes toward the front side. The front end of the sorting conveyor 44 is arranged above the rear end of the other discharge path 76, and the other beverage containers 18 of the collected materials 12 that the sorting conveyor 44 has conveyed to the front side are placed at the rear end of the other discharge path 76. The liquid is dropped into the other parts and flows down the other discharge passage 76. A collection bag 78 is disposed below the front end of the discharge passage 76, and the beverage containers 18 that have flown down the discharge passage 76 are dropped into the collection bag 78 and collected.

Next, the operation of this embodiment will be explained.

In the sorting device 10 having the above configuration, the collected materials 12 are supplied to the removal mechanism 22 from above, and after the removal conveyor 24 of the removal mechanism 22 conveys the collected materials 12 to the front side, the ascending conveyor 38 of the ascending mechanism 34 collects the collected materials 12. The object 12 is conveyed diagonally upward to the front. Then, the sorting conveyor 44 of the main body mechanism 40 conveys the collected items 12 to the front side.

In the main body mechanism 40 , a metal sensor 46 detects (discriminates) a can 14 from the collected material 12 , and a first crank mechanism 48 sorts the can 14 from the collected material 12 . Further, the NIR sensor 60 detects (discriminates) the empty PET bottle 16A from the collected material 12, and the second crank mechanism 64 sorts out the empty PET bottle 16A from the collected material 12. Furthermore, the NIR sensor 60 detects (discriminates) the accommodated PET bottle 16B from the recovered material 12, and the third crank mechanism 70 sorts out the accommodated PET bottle 16B from the recovered material 12. Then, cans 14, empty PET bottles 16A, and stored PET bottles 16B are sorted out from the recovered material 12, and other beverage containers 18 are sorted out from the recovered material 12.

Here, the NIR sensor 60 detects the empty PET bottle 16A and the stored PET bottle 16B from the collected material 12, and the second crank mechanism 64 sorts out the empty PET bottle 16A from the collected material 12, and the stored PET bottle 16B. The third crank mechanism 70 sorts out the collected items 12. Therefore, the PET bottles 16 can be sorted into the empty PET bottles 16A and the accommodated PET bottles 16B, and the PET bottles 16 can be appropriately sorted from the collected materials 12.

Furthermore, the flappers 50 of the second crank mechanism 64 and the third crank mechanism 70 press the plastic bottles 16 (the empty plastic bottles 16A and the stored plastic bottles 16B) to separate them from the collected materials 12. Therefore, even when the weight of the PET bottle 16 is large, such as the stored PET bottle 16B, the PET bottle 16 can be separated from the collected material 12 by the flapper 50, and the PET bottle 16 can be appropriately separated from the collected material 12.

Further, in the removal mechanism 22, the foreign matter 20 in the collected object 12 is dropped from the removal port 28 between the upper surface of the removal conveyor 24 and the support plate 26 (passes through the removal port 28), and is removed from the collected object 12. . Therefore, the metal sensor 46 can appropriately detect the can 14 from the collected material 12, and the NIR sensor 60 can appropriately detect the empty PET bottle 16A and the stored PET bottle 16B from the collected material 12. Also, the stored PET bottles 16B can be appropriately and stably sorted from the collected materials 12. Moreover, damage to the sorting device 10 caused by the foreign matter 20 can be suppressed.

Furthermore, in the removal mechanism 22, the distance between the support plate 26 and the top surface of the removal conveyor 24 is adjustable, and the width of the removal port 28 is adjustable. Therefore, the size of the foreign object 20 removed from the removal port 28 can be adjusted.

In addition, in this embodiment, the removal conveyor 24 (including the support plate 26) may be vibrated by a vibration mechanism. Thereby, the collected material 12 conveyed by the removal conveyor 24 can be vibrated, the foreign matter 20 can be separated from the collected material 12 well, and the foreign material 20 can be favorably removed from the removal port 28. Furthermore, a vibration mechanism may vibrate at least one of the ascending conveyor 38 and the sorting conveyor 44.

Further, in this embodiment, the width direction of the pair of removal conveyors 24 (including the removal belt 24A) is inclined downward as it goes outward in the left-right direction of the removal mechanism 22. However, the width direction of the pair of removal conveyors 24 (including the removal belt 24A) may be inclined downward as it goes inward in the left-right direction of the removal mechanism 22. In this case, the collected material 12 is conveyed by the pair of removal belts 24A between the pair of removal conveyors 24 with its longitudinal direction (vertical direction) oriented in the front-rear direction, and the collected material 12 is transported to a position in the horizontal direction of the removal mechanism 22. In addition, the removal port 28 may be formed between the pair of removal conveyors 24. Moreover, at least one of the metal sensor 46 and the NIR sensor 60 may be provided above or below between the pair of removal conveyors 24, thereby keeping the distance between the metal sensor 46 and the NIR sensor 60 from the collected object 12 constant. Therefore, detection (discrimination) by the metal sensor 46 and the NIR sensor 60 can be stabilized.

Furthermore, in this embodiment, a removal mechanism 22 is provided. However, the removal mechanism 22 may not be provided. In this case, the removal port 28 may be provided in the lifting mechanism 34.

Further, in this embodiment, the main body mechanism 40 is provided with a metal sensor 46 and an NIR sensor 60. However, the lifting mechanism 34 may be provided with at least one of the metal sensor 46 and the NIR sensor 60.

10 Sorting device 12 Collected materials (target for sorting)
16 PET bottle (resin bottle)
20 Foreign matter 24 Removal conveyor (transport mechanism)
28 Removal port 38 Rising conveyor (transport mechanism)
44 Sorting conveyor 50 Flapper (pressing member)
60 NIR sensor (discrimination mechanism)
64 Second crank mechanism (sorting mechanism)
70 Third crank mechanism (sorting mechanism)

Claims (3)

a transport mechanism that transports objects to be sorted including resin bottles;
a discrimination mechanism that discriminates a resin bottle from a sorting target and discriminates a resin bottle containing a contained object and a resin bottle not containing a contained object from the sorting object based on the absorbance of the contained object in the sorting object ;
A pressing member is provided, and the pressing member presses a resin bottle containing an object discriminated by the discrimination mechanism to select it from the objects to be sorted, and a resin bottle that does not contain the object discriminated by the discrimination mechanism is selected. A sorting mechanism that sorts from the sorting targets;
A sorting device equipped with 2. The sorting device according to claim 1, further comprising a removal port provided in the conveyance mechanism, through which foreign substances in the object to be sorted conveyed by the conveyance mechanism are removed. The sorting device according to claim 1 or 2, further comprising a vibration mechanism that vibrates the transport mechanism.