JP2004009005A - Magnetic sorting mechanism and sorting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic sorting mechanism that is capable of facilitating a cleaning work performed upon the periodical check, in addition to the long-term continuous operation and that is applicable to various materials to be sorted, and to provide a system using the same. <P>SOLUTION: The magnetic sorting mechanism is provided with a hollow rotative tube 5 which is free to rotate, in which a foreign material comprised of a weak magnetic material receives the material to be sorted at least existing therein as an admixture on the surface, a permanent magnet 6 which is arranged to the longitudinal direction in the hollow part of the rotative tube 5 and produces the predetermined magnetic field to the longitudinal direction. The rotative tube 5 is released by means of the rotation after conveying the material to be sorted when the material to be sorted is supplied to the surface of the rotative tube 5. The permanent magnet 6 imparts magnetic force to the material to be sorted when the material to be sorted is released. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is included in agricultural products, marine products, processed foods (e.g., croutons, egg flakes, meat cubes), and fine and minute objects such as plastics in the form of pellets, or powders such as konjac flour and rice flour. The present invention relates to a magnetic force sorting device capable of separating a foreign substance such as a weak magnetic material or a ferromagnetic material using a magnetic force.
[0002]
In addition, the present invention applies the magnetic force sorting apparatus as described above, and in addition to a weak magnetic material or a ferromagnetic material, a non-magnetic metal (non-ferrous metal) such as aluminum or copper, hair, a vinyl piece, a string piece, or the like. And a sorting system capable of removing light foreign matter.
[0003]
[Prior art]
2. Description of the Related Art Conventionally, as a magnetic separation device, for example, a permanent magnet type roll separator described in JP-A-4-74546 is known.
The permanent magnet type roll separator includes a transport belt for transporting the resin pellets, a drive roll and a permanent magnet roll around which the transport belt is wound, and a separator provided near a lower end where the transport belt separates from the permanent magnet roll. And a scraper.
[0004]
In the permanent magnet type roll separator having such a configuration, the resin pellets supplied on the transport belt spread on the transport belt and reach the position of the permanent magnet roll. Here, the conveyor belt starts a circular motion along the permanent magnet roll. As a result, a downward acceleration due to gravity is applied to the conveying speed of the resin pellet, and the resin pellet starts to fall while changing the speed. At this time, the pellets without the magnetic metal pieces are not attracted by the magnetic force of the permanent magnet roll, and thus fall away from the conveyor belt. On the other hand, the pellets into which the magnetic metal pieces are mixed move to the separating scraper while being attached to the conveyor belt by the magnetic force of the permanent magnet roll, where they are scraped off and dropped.
[0005]
As a result, the pellets with no mixing of the magnetic metal pieces can be stored in a non-defective product box, and the mixed pellets can be stored in a defective product receiver.
[0006]
[Problems to be solved by the invention]
By the way, since the permanent magnet type roll separator uses a conveyor belt, it is necessary to adjust the meandering and tension of the belt.
In addition, the above-mentioned permanent magnet type roll separator is designed to scrape off the pellets mixed with the magnetic metal pieces adhering to the conveyor belt by the separating scraper, so that the conveyor belt is easily worn and a relatively short time. There is a disadvantage that it needs to be replaced.
[0007]
Further, since the above-described permanent magnet type roll separator uses a conveyor belt, for example, when the sorted object is a powder, the sorted object easily adheres to the surface of the conveyor belt.
For this reason, in the above-described permanent magnet type roll separator, it is necessary to periodically stop the operation of the conveyor belt at a relatively short cycle and check the state of the conveyor belt, and the like. There is an inconvenience that it is not suitable for continuous operation.
[0008]
Also, in the above-mentioned permanent magnet type roll separator, cleaning work of the conveyor belt and the like is performed at the time of the periodic inspection, but the workability at that time is poor, and the work is performed when the sorted material is powder. There is a disadvantage that the environment becomes worse.
Further, since the above-mentioned permanent magnet type roll separator is a belt type, there is a problem that the belt cannot be cleaned with water or hot water.
[0009]
In view of the above, a first object of the present invention is to enable continuous operation for a long time, to facilitate cleaning work at the time of a periodic inspection, and to produce agricultural products, marine products, and other industrial materials. An object of the present invention is to provide a magnetic force sorting apparatus suitable for sorting foreign substances contained in various substances.
Further, a second object of the present invention is to provide a sorting system in which the above-described magnetic force sorting apparatus is applied, the objects to be sorted can be expanded, applications can be expanded, and added value is enhanced.
[0010]
[Means for Solving the Problems]
In order to solve the above problems and achieve the first object of the present invention, the inventions according to claims 1 to 6 are configured as follows.
That is, according to the first aspect of the present invention, a rotatable hollow rotary cylinder that receives, at its surface, a sorted material into which at least foreign matter composed of a weak magnetic material is mixed, and a longitudinal direction in the hollow portion of the rotary cylinder. And a permanent magnet that generates a predetermined magnetic field in the longitudinal direction of the rotary cylinder. When the sorted material is supplied to the surface of the rotary cylinder, the rotary cylinder is transported by rotation and then discharged. And wherein the permanent magnet applies a magnetic force to the selected material when the selected material is released.
[0011]
According to a second aspect of the present invention, in the magnetic force sorting apparatus according to the first aspect, a separation adjusting plate that separates the rotary cylinder and the foreign matter sorted by the permanent magnet from an object other than the foreign matter is provided on the rotary cylinder. It is further arranged on the lower front side, and the separation adjusting plate can swing about an axis.
According to a third aspect of the present invention, in the magnetic force sorting apparatus according to the first or second aspect, the apparatus further comprises a fixed-quantity supply unit configured to supply a fixed amount of the sorted material to the surface of the rotary cylinder. Is what you do.
[0012]
According to a fourth aspect of the present invention, in the magnetic force sorting apparatus according to the first, second, or third aspect, the permanent magnet has a substantially cylindrical shape as a whole and is rotatable. Has a magnetic force of 14000 gauss or more.
According to a fifth aspect of the present invention, in the magnetic force sorting apparatus according to any one of the first to fourth aspects, the permanent magnet includes a plurality of ring-shaped permanent magnets, and the plurality of ring-shaped permanent magnets. Is characterized in that adjacent magnetic poles are arranged in series so as to be opposite to each other, and a soft iron yoke is interposed between the plurality of ring-shaped permanent magnets.
[0013]
According to a sixth aspect of the present invention, there is provided the magnetic force sorting apparatus according to any one of the first to fifth aspects, wherein the permanent magnet is disposed in the rotating cylinder in a longitudinal direction of the rotating cylinder. It is characterized by further comprising permanent magnet moving means for moving in a crossing direction.
As described above, according to the magnetic force sorting device of the present invention, a hollow rotary cylinder and a permanent magnet disposed in the hollow portion of the rotary cylinder are provided, and by these, a weak magnetic Foreign substances such as body are separated.
[0014]
For this reason, in the magnetic force sorting apparatus of the present invention, since a conveyor belt is not used unlike the conventional apparatus, the number of regular inspections can be reduced and the time of continuous operation can be extended.
Further, in the magnetic force sorting apparatus of the present invention, the permanent magnet is arranged in the hollow portion of the rotary cylinder, so that both can be physically separated. For this reason, the cleaning work of the rotary cylinder can be easily performed at the time of the periodic inspection, and even when the sorted material is a powder, the cleaning work is facilitated and the maintainability is improved. be able to.
[0015]
In order to achieve the second object of the present invention, each of the inventions according to claims 7 to 9 is configured as follows.
That is, according to a seventh aspect of the present invention, there is provided the magnetic force sorting device according to any one of the first to sixth aspects, and the magnetic force sorting device is disposed upstream of the magnetic force sorting device, and sorts the sorted material by wind power. And a wind separation device.
[0016]
In such a sorting system of the present invention, in addition to a magnetic force sorting device, a wind force sorting device is provided, so that even for a sorted material that requires wind force sorting, a weak magnetic material mixed into the sorted material after the sorting. Foreign matter can be separated. For this reason, the selection target can be expanded and a selection system with added value can be provided.
According to an eighth aspect of the present invention, there is provided the magnetic separation apparatus according to any one of the first to sixth aspects, and the magnetic separation apparatus is disposed downstream of the magnetic separation apparatus, and the magnetic material is removed by the magnetic separation apparatus. A metal detector for detecting a non-magnetic metal contained in the sorted product, and a non-magnetic metal separation device for separating the non-magnetic metal when the metal detector detects the non-magnetic metal. It is characterized by the following.
[0017]
In such a sorting system of the present invention, in addition to the magnetic force sorting device, the metal detector and the non-magnetic metal separating device are provided, so that the magnetic material is removed from the sorted material by the magnetic force sorting device. Non-magnetic metals can be further removed. For this reason, the selection target can be expanded and a selection system with added value can be provided.
According to a ninth aspect of the present invention, there is provided a magnetic separator according to any one of the first to sixth aspects, and a wind separator disposed upstream of the magnetic separator to sort the sorted objects by wind power. A metal detector that is disposed downstream of the magnetic separation device and detects a non-magnetic metal contained in the sorted material from which the magnetic material has been removed by the magnetic separation device; and And a non-magnetic metal separation device that separates the non-magnetic metal when the metal is detected.
[0018]
In such a sorting system of the present invention, a wind force sorting device, a metal detector, and a non-magnetic metal separating device are provided in addition to the magnetic force sorting device. Therefore, prior to the selection by the magnetic separation device, light foreign substances such as hair, vinyl pieces, and string pieces can be removed by wind power, and non-magnetic metals that cannot be removed by the magnetic separation device can be separated by the non-magnetic metal separation device. For this reason, the selection target can be expanded and a selection system with added value can be provided.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A schematic configuration of an embodiment of a magnetic force sorting apparatus according to the present invention will be described with reference to FIGS.
As shown in FIG. 1, the magnetic separation device of this embodiment includes a hopper 1, a fixed amount supply mechanism 4 including a pair of fixed amount supply rollers 2, 3, a rotating cylinder 5, a permanent magnet 6, a separation adjusting plate 7, And a fall prevention plate 8, and each component except the hopper 1 is disposed in a sorting case 9.
[0020]
A non-defective product chute 10 for guiding non-defective products selected by the rotating cylinder 5 and the permanent magnet 6 to a non-defective product receiver (not shown), and a non-defective product receiver (not illustrated) for the selected defective products are provided at a lower portion of the selection case 9. Are connected to each other.
More specifically, the hopper 1 accommodates a sorted material into which at least fine or minute foreign matter of a weak magnetic material is mixed, and a discharge port of which is disposed below the hopper 1. Is opposed to the gap. It should be noted that the sorted objects to be sorted in this embodiment will be described later.
[0021]
The fixed quantity supply mechanism 4 is composed of a pair of rotatable fixed quantity supply rollers 2 and 3, and receives the sorted material discharged from the discharge port of the hopper 1, and transfers the received sorted material to the upper surface side of the rotary cylinder 5. In this manner, a fixed amount is continuously supplied in the length direction.
The rotating cylinder 5 receives the sorted material mixed with foreign substances from the upper surface and transports the sorted material, and is constituted by a thin (for example, 1 mm or less) hollow cylindrical body. The rotating cylinder 5 is entirely made of a hard-to-wear metal such as stainless steel, and can be rotated at a predetermined speed by a motor as described later. Further, by controlling the rotation of the motor, the number of rotations of the rotary cylinder 5 is controlled, and by the control, the transport amount of the sorted material per unit time can be controlled.
[0022]
The whole permanent magnet 6 is formed in a substantially columnar shape. This permanent magnet 6 is rotatably arranged in the longitudinal direction of the rotary cylinder 5 on the upper side in the hollow portion of the rotary cylinder 5 and on the side where the sorted material is discharged on the rotary cylinder 5. A predetermined magnetic field is generated in the direction. Then, when the sorted material on the upper surface of the rotating cylinder 5 is discharged, the permanent magnet 6 applies a magnetic force to the sorted material.
[0023]
Here, as described later, the permanent magnet 6 can move in the rotating cylinder 5 in a direction intersecting the length direction of the rotating cylinder 5 (specifically, the X direction and the Y direction in FIG. 1). After the movement, it can be positioned at a predetermined position.
The openings at both ends of the rotary cylinder 5 are open in FIGS. 1 and 2, but are actually closed except for the portion through which the shaft of the permanent magnet 6 penetrates. An airtight structure is adopted such that a seal is provided so that water does not enter the rotary cylinder 5 even if the water is washed with water or hot water.
[0024]
The separation adjusting plate 7 guides the foreign matter to the defective product chute 11 side when the sorted material conveyed on the rotary cylinder 5 is discharged and sorted into the foreign matter and the non-foreign matter. This is for guiding to the chute 10 side. Since the release state of the separation adjusting plate 7 varies depending on the weight of the selection object, the rotation speed of the rotary cylinder 5, and the like, the arrangement angle can be adjusted accordingly. That is, the separation adjusting plate 7 can be rotated (oscillated) about the shaft 12 to adjust the arrangement angle, and after the adjustment, can be fixed at the arrangement angle. Further, the separation adjusting plate 17 can be moved in the same direction by moving the shaft 12 in a direction (X direction) orthogonal to the length direction of the rotary cylinder 5, and can be fixed after the movement. .
[0025]
Since the sorted material supplied from the fixed quantity supply mechanism 4 onto the rotary cylinder 5 is temporarily stored in the fall prevention plate 8, the fall prevention plate 8 prevents the sorted material from falling in the direction opposite to the rotation direction of the rotary cylinder 5. It has become.
It is preferable to provide a transparent window (not shown) in a part of the sorting case 9 so that the inside state can be observed during the operation. In addition, the sorting case 9 is in a sealed state during the operation, but at the time of inspection work or cleaning work, a portion where the work is necessary can be easily removed so that the work becomes easy. ing.
[0026]
Next, the operation of the embodiment of the magnetic force sorting device having such a configuration will be described with reference to FIGS.
Sorted products to be sorted in this embodiment include dried vegetables such as sesame, grains such as rice and flour, dried marine products such as small cut seaweed, pepper, konjac flour, flour, salt, rice flour and the like. Powders, pellets, beads, powdery plastics, and the like, and as foreign matter to be sorted (separated) in the sorted materials, ferromagnetic substances such as fine iron and fragments of stainless steel (fragments such as SUS304) ) Or a non-magnetic metal such as fine aluminum or copper may be mixed or kneaded.
[0027]
In addition, as the above-mentioned weak magnetic material, besides the above-mentioned stainless steel fragments, pebbles and mud containing iron oxide, insect droppings, rat droppings, and the like can be given.
Furthermore, in addition to the case where the above-mentioned foreign matter is mixed in the above-mentioned sorted materials, the above-mentioned foreign matter may be attached to a non-defective product which is not a foreign matter. In the embodiment, the one to which the foreign matter adheres can be separated and can be selected.
[0028]
Now, assuming that such a sorted material is stored in the hopper 1, the sorted material is discharged from the discharge port of the hopper 1 by its own weight and falls onto the fixed amount supply rollers 2, 3.
The sorted material is continuously supplied by the constant-quantity supply rollers 2 and 3 by a constant amount in the longitudinal direction of the rotary cylinder 5 on the upper surface side (front surface side) of the rotary cylinder 5. The supplied sorted material is temporarily stored on the upper surface of the rotating cylinder 5, and the rotating cylinder 5 is rotating at a predetermined speed clockwise as shown in FIG. Therefore, the sorted material is conveyed toward the discharge side by the rotation of the rotary cylinder 5.
[0029]
When the sorted material reaches the discharge end, the sorted material is thrown out of the rotary cylinder 5 at the speed of conveyance, and a downward acceleration due to gravity is applied to the conveyance speed, so that the sorted material falls while changing the speed.
At this time, for example, when the selected material is a non-magnetic material and is a non-defective item, the non-defective item includes a rotation by the permanent magnet 6 rotating in the same direction as the rotary tube 5 when being discharged from the rotary tube 5. Magnetic force does not act. For this reason, the non-defective product is discharged to a position far away from the rotary cylinder 5, and is stored in a non-defective product receiver (not shown) via the non-defective product chute 10.
[0030]
On the other hand, when the selected material is a magnetic material such as a weak magnetic material or a ferromagnetic material (defective product), the foreign matter is included in the same direction as the rotating cylinder 5 when being discharged from the rotating cylinder 5. , A rotating magnetic force by the rotating permanent magnet 6 acts. For this reason, the foreign matter cannot be separated far from the rotary cylinder 5 at the time of discharge, and is attracted, and is accommodated in a defective product receiver (not shown) via the defective product chute 11.
[0031]
Here, in the case where the foreign matter is a weak magnetic material such as stainless shards, pebbles or mud containing iron oxide, insect droppings, rat droppings, etc., there is no possibility that the foreign matter will adhere to the rotating cylinder 5. In the case of a ferromagnetic material such as an iron piece or iron powder, the gap between the rotating cylinder 5 and the permanent magnet 6 gradually increases, so that the magnetic force gradually decreases, and the magnetic force does not remain adsorbed on the rotating cylinder 5. Fall.
[0032]
The permanent magnet 6 does not necessarily need to rotate, but preferably rotates as described above.
In addition, the position of the permanent magnet 6 is adjusted by an adjusting mechanism described later in order to perform the optimum sorting according to the kind of the sorting object and the rotation speed of the rotary cylinder 5.
Next, a specific configuration of the magnetic force sorting device of this embodiment will be described with reference to FIG.
[0033]
The hopper 1 is fixed to the slide frame 16 by appropriate means. The slide frame 16 can move (slide) in the left-right direction (X direction) in FIG. 3 with respect to the main frame 15. Thereby, the sorted material from the hopper 1 can be supplied to an arbitrary position on the rotary cylinder 5.
The fixed amount supply rollers 2 and 3 are rotatably fixed to the slide frame 16. One or both of the fixed amount supply rollers 2 and 3 are orthogonal to the length direction of the fixed amount supply rollers 2 and 3 so that the gap between the fixed amount supply rollers 2 and 3 can be adjusted to adjust the supply amount of the sorted material. It includes a mechanism (not shown) that can move in any direction and can be positioned after the movement.
[0034]
As shown in FIG. 3, the left and right sides of the lower surface of the rotating cylinder 5 are supported by rotating cylinder receiving rollers 21 and 22, and are rotatable on the rotating cylinder receiving rollers 21 and 22. The rotary cylinder receiving rollers 21 and 22 are rotatably fixed at predetermined positions using a main frame 41.
In order to rotate the rotary cylinder 5, belt wheels 23, 24 and a belt tension unit 25 are respectively arranged at predetermined positions below the longitudinal end of the rotary cylinder 5, and the end of the rotary cylinder 5, the belt wheel A belt 26 is stretched around 23, 24 and the belt tension unit 25.
[0035]
The belt wheel 23 is rotatably fixed to one end of a rotating shaft 27 that is supported. A belt wheel 28 is fixed to the other end of the rotating shaft 27, and the torque of the motor 30 is transmitted to the belt wheel 28 via a belt 29.
Therefore, according to such a configuration, the rotating force of the motor 30 can be transmitted to the rotating cylinder 5 via the belt 29, the belt 26, and the like, and the rotating cylinder 5 can be rotated in a predetermined direction at a predetermined speed.
[0036]
Here, a specific example of the configuration of the rotary cylinder 5 is a cylindrical configuration made of stainless steel (for example, SUS304 or the like) having a thickness of 1 mm or less, the diameter of which is equal to the diameter of a permanent magnet 6 described later. Is about 250 [mm], for example.
The permanent magnet 6 has a shaft 61, and both ends of the shaft 61 are rotatably supported by bearings (not shown) provided on the lifting frame 18. A belt wheel 41 is fixed to one end of the shaft 61, and the belt wheel 41 is connected via a belt 43 to a belt wheel 42 fixed to a rotating shaft of a motor (not shown) provided on the lifting frame 18. ing.
[0037]
The elevating frame 18 is attached to the slide frame 17 so as to be able to move up and down. That is, the elevating frame 17 is attached to the slide frame 17 so as to be movable in the vertical direction (Y direction) in FIG. The slide frame 17 is attached to the main frame 15 so that the slide frame 17 can slide in the left-right direction with respect to the main frame 15. That is, the slide frame 17 is attached to the main frame 15 so as to be movable in the left-right direction (X direction) in FIG.
[0038]
According to such a configuration, the permanent magnet 6 can be rotated at a predetermined speed in a predetermined direction by a motor in the hollow portion of the rotary cylinder 5 and in the hollow portion in a direction orthogonal to the length direction of the rotary cylinder 5. It can move, and after that it can be positioned.
The separation adjusting plate 7 is separated into two parts, an upper side and a lower side, both of which can rotate (rotate) around the shaft 12, and the shaft 12 is guided by the guide groove 31. , Can be moved in the X direction of FIG.
[0039]
Next, a specific configuration of the permanent magnet 6 will be described with reference to FIGS.
As shown in FIG. 4, the permanent magnet 6 includes a rotating shaft 61, a plurality of ring-shaped permanent magnets 62, a plurality of soft iron yokes 63, fixing members 64 and 65, and a fastening nut 66.
[0040]
As shown in FIG. 5, the ring-shaped permanent magnet 62 has one end face magnetized to the N-pole and the other end face magnetized to the S-pole. ing. Further, the soft iron yoke 63 is formed in a ring shape similarly to the ring-shaped permanent magnet 62, and a hole portion is inserted into the rotating shaft 61.
In this permanent magnet 6, as shown in FIG. 4, a ring-shaped permanent magnet 62 and a soft iron yoke 63 are alternately inserted with respect to the rotating shaft 61, and the adjacent magnetic poles of the ring-shaped permanent magnet 62 are reversed. A plurality of them are arranged in series as shown in FIG. Then, both ends of the soft iron yokes 63 at both ends are fixed by fixing members 64 and 65, and simultaneously, the fixing members 64 are fixed by tightening nuts 66, whereby the plurality of ring-shaped permanent magnets 62 and the soft iron yokes 63 are mutually fixed. It is fixed to the rotating shaft 61 in a state of contact.
[0041]
Here, the specific size of the permanent magnet 6 having such a configuration is 150 mm or more in diameter and about 300 mm to 1000 mm in length. The magnetic force on the surface is 14000 gauss or more.
As described above, the permanent magnet 6 includes the plurality of ring-shaped permanent magnets 62, and the plurality of magnets 62 are arranged in series such that adjacent magnetic poles are reversed. For this reason, the lines of magnetic force (magnetic field) of each ring-shaped permanent magnet 62 are as shown in FIG. Therefore, the magnetic force on the surface in the longitudinal direction of the permanent magnet 6 can be made uniform.
[0042]
Next, an embodiment of a sorting system of the present invention to which the magnetic force sorting apparatus of the embodiment of the present invention is applied will be described with reference to FIG.
In the magnetic force sorting apparatus using magnetic force as shown in FIG. 1, foreign matter such as a magnetic material mixed into a sorted material can be separated, but light foreign materials such as hair, vinyl pieces, and string pieces other than the magnetic material can be used. In addition, it is impossible to separate foreign substances such as non-magnetic metals, or to equalize the size of sorted objects.
[0043]
Therefore, in order to solve such inconveniences, as shown in FIG. 6, a magnetic force sorting device 71 using a magnetic force as shown in FIG. 1, and a shape sorting device 72 and a wind force sorting device 73 provided on the upstream side thereof. And a metal detector 110 and a non-magnetic metal separation device 120 provided on the downstream side of the magnetic force separation device 71, so that the objects to be sorted are expanded by these components, and a sorting system capable of expanding applications is configured.
[0044]
This sorting system is suitable for dry foods such as dried vegetables, dried hijiki and sesame containing foreign substances such as metals, stones and mud.
The shape sorting device 72 sorts out the appropriate size from the above dried foods, and as shown in FIG. 6, has a two-stage structure in a housing 81 installed so as to be able to vibrate. It is composed of a vibration feeder provided with wire mesh members 83 and 84.
[0045]
The housing 81 is provided with a supply port 82 for supplying the dry food as described above, and the dry food supplied from the supply port 82 is moved from the right to the left in FIG. It is going to progress. Further, the dried food dropped from the wire mesh member 83 onto the wire mesh member 84 travels in the same direction by the vibration. Further, the powder or the like of the dried food dropped from the wire mesh member 83 to the bottom of the housing 81 travels in the same direction by the vibration.
[0046]
On the discharge side of the upper wire mesh member 83, a discharge port 85 for discharging a large-sized one is provided. On the discharge side of the lower wire mesh member 84, a discharge port 86 for discharging a small one is provided. At a substantially central portion of the housing 81, an outlet 87 is provided which extends downward from the wire netting member 84 to the housing 81 and discharges an object having an appropriate shape.
The mesh size of the wire netting member 83 is set to a size that allows the passage of dry foods having a predetermined size or less, that is, dry foods having an appropriate size and a size smaller than the predetermined size. The mesh size of the wire netting member 84 allows the passage of the powder of the dried food smaller than the dried food of an appropriate size, and prevents the passage of the dried food of the appropriate size.
[0047]
According to the shape sorting device 72 having such a configuration, when dry food is supplied from the supply port 82, a dry food of an appropriate size can be discharged from the discharge port 87, and a larger dry food can be discharged. The powder can be discharged from the discharge port 85, and the powder of the dried food can be discharged from the discharge port 86.
As shown in FIG. 6, the wind power sorting device 73 uses the difference in the weight of the dried foods to separate the dried foods that have been sorted into an appropriate shape by the wind power and the hair and vinyl string pieces and the like contained therein. What separates.
[0048]
The wind separation device 73 includes a housing 91 having an inlet 94 at the top and an outlet 95 at the bottom. Further, the inside of the casing 91 is partitioned by a partition plate 92 extending from the top to the bottom, and the inside of the casing 91 communicates with the dried food falling passage 96 communicating with the inlet 94 and the lower side communicates with the dried food falling passage 96. The discharge passage 97 is formed.
[0049]
The outlet 95 communicates with the dried food falling passage 96 and the discharge passage 97. A plurality of air nozzles 93 for discharging air are arranged on the casing 91 at the end side of the dried food falling passage 96 with their outlets facing the start end side of the discharge passage 97. The plurality of air nozzles 93 are connected to an air supply source (not shown). The end side of the discharge passage 97 is connected to a dust collector 100 via a duct 98.
[0050]
According to the wind sorting device 73 having such a configuration, the dried food of the appropriate size selected by the shape sorting device 72 falls through the dried food falling passage 96, and blows out from the air nozzle 93 when reaching the terminal end side. Wind power by air is applied. For this reason, the lighter hair and vinyl string pieces contained in the dried food of an appropriate size move to the start end side of the discharge passage 97 by the wind force, and are sucked into the dust collector 100. On the other hand, dried foods of an appropriate size fall due to their own weight due to weak wind action and are collected in the hopper 1 of the magnetic separation device 71.
[0051]
The metal detector 110 is installed below the non-defective product chute 10 and detects a non-magnetic metal contained in the selected product (non-defective product) from which the magnetic material has been removed by the magnetic force separation device 71.
The metal detector 110 has a through-passage 111 at the center of the head, through which a sorting object falling can pass, and the through-passage 111 has an oscillation for generating an electromagnetic field as shown in FIG. And a receiving coil TX1 and TX2 which are arranged at a predetermined distance on both sides of the oscillation coil TX and excite a voltage by an electromagnetic field generated by the oscillation coil TX. Further, a stainless steel ring 112 for controlling the leakage of the electromagnetic field from the oscillation coil TX is attached to the entrance of the through passage 111.
[0052]
The metal detector 110 having such a configuration provides the output voltage of the receiving coil RX1 and the receiving coil RX2 when the sorting object passing through the through passage 111 includes a non-ferrous metal and does not include a non-ferrous metal. The fact that the potential difference from the output voltage is different.
That is, when the sorted object including the non-ferrous metal passes through the through-path 111 of the metal detector 110, the output potential difference between the receiving coils RX1 and RX2 exceeds the + threshold value and the -threshold value. A detection signal to the effect that the conductive metal is contained is output to a control device (not shown).
[0053]
On the other hand, when a sorted object not containing a non-ferrous metal passes through the through passage 111, the output potential difference between the receiving coils RX1 and RX2 does not exceed the + threshold value and the -threshold value. No detection signal to the effect that metal is contained is output.
The non-magnetic metal separating device 120 separates the sorted material (non-defective product) from which the magnetic material has been removed by the magnetic force sorting device 71 into a defective product containing non-magnetic metal and a non-defective product containing no non-magnetic metal.
[0054]
The non-magnetic metal separation device 120 includes a swingable separation plate 121 therein, and a non-defective discharge passage 124 located at a lower position corresponding to the through passage 111 of the metal detector 110 with the separation plate 121 interposed therebetween. And a defective product discharge section 122 located on the opposite side. A defective product receiver 123 is disposed below the defective product discharge unit 122, and a non-defective product receiver 125 is disposed below the non-defective product discharge unit 124.
[0055]
In the non-magnetic metal separation device 120 configured as described above, when the control device (not shown) receives the detection signal of the non-ferrous metal from the metal detector 110, the control device moves the separation plate 121 in the direction of the broken line in FIG. The defective products including the nonferrous metal are accumulated in the defective product receiver 123 via the defective product discharge unit 122.
On the other hand, when the control device does not receive the detection signal of the nonferrous metal from the metal detector 110, the control device maintains the separation plate 121 at the position indicated by the solid line in FIG. Via the non-defective product receiver 125.
[0056]
Here, as described above, since the magnetic material including the weak magnetic material is removed by the magnetic force sorting device 71, the output potential difference between the receiving coils RX1 and RX2 in the metal detector 110 is reduced. For this reason, the threshold value for discriminating a defective product containing a nonmagnetic metal from a good product containing no nonmagnetic metal can be set low.
Therefore, the sensitivity of the metal detector 110 can be increased, and a small object can be detected as compared with the case where the metal detector 110 is used alone. In particular, the detection sensitivity of non-ferrous metals is improved.
[0057]
That is, a smaller foreign substance can be removed by combining the magnetic separation device 71 and the metal detector 110 as compared with the case where the metal detector 110 is used alone.
[0058]
【The invention's effect】
As described above, according to the magnetic separation apparatus of the present invention, since the conveyor belt is not used unlike the related art, the number of regular inspections can be reduced and the time of continuous operation can be lengthened.
Further, with the magnetic force sorting apparatus of the present invention, the cleaning work of the rotating cylinder can be easily performed at the time of periodic inspection, and even when the sorted material is a powder, the cleaning work is facilitated. As a result, the maintainability can be improved.
According to the sorting system of the present invention, even in the case of a sorted product that requires wind sorting, it is possible to separate the weak magnetic foreign matter mixed in the sorted product after the sorting, so that the sorting target can be expanded, and the sorting object can be expanded. A high value-added sorting system can be provided.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of an embodiment of a magnetic force sorting apparatus according to the present invention.
FIG. 2 is a perspective view showing a schematic configuration of the embodiment.
FIG. 3 is a side view showing a detailed configuration of the embodiment.
FIG. 4 is a side view showing an example of a permanent magnet.
FIG. 5 is a perspective view illustrating the arrangement of a ring-shaped permanent magnet and the direction of a magnetic field thereof.
FIG. 6 is a side view showing an embodiment of the sorting system of the present invention.
FIG. 7 is a schematic configuration diagram of an oscillation coil and a reception coil arranged in a through path of a metal detector.
[Explanation of symbols]
1 Hopper
2, 3 fixed feed roller
4 Quantitative supply mechanism (quantitative supply means)
5 rotating cylinder
6 permanent magnet
7 Separation adjustment plate
8 Fall prevention plate
9 Case for sorting
16, 17 slide frame
18 Elevating frame
62 ring-shaped permanent magnet
63 Soft iron yoke
71 Magnetic sorting device
72 Shape sorter
73 Wind separator
110 Metal Detector
120 Non-magnetic metal separator

Claims (9)

A rotatable hollow rotary cylinder that receives at the surface a sorted material mixed with at least foreign matter composed of a weak magnetic material,
A permanent magnet that is disposed in the hollow portion of the rotating cylinder in the length direction and generates a predetermined magnetic field in the length direction,
The rotating cylinder, when the sorted material is supplied to the surface of the rotating cylinder, is configured to be transported by rotation and then discharged.
The magnetic force sorting device, wherein the permanent magnet applies a magnetic force to the sorted material when the sorted material is released. A separation adjusting plate for separating the rotating cylinder and the foreign matter selected by the permanent magnet from the foreign matter is further arranged at a lower front side of the rotating cylinder, and the separation adjusting plate can swing about an axis. The magnetic separation device according to claim 1, wherein: The magnetic separation apparatus according to claim 1, further comprising a fixed amount supply unit configured to supply a fixed amount of the sorted material to a surface of the rotary cylinder. 4. The magnetic force according to claim 1, wherein the permanent magnet has a substantially cylindrical shape as a whole and is configured to be rotatable, and has a surface magnetic force of 14,000 gauss or more. 5. Sorting device. The permanent magnet includes a plurality of ring-shaped permanent magnets, and the plurality of ring-shaped permanent magnets are arranged in series such that adjacent magnetic poles are opposite to each other, and soft iron is disposed between the plurality of ring-shaped permanent magnets. The magnetic separation device according to any one of claims 1 to 4, wherein a yoke made is interposed. The permanent magnet moving means for moving the permanent magnet in a direction intersecting with a length direction of the rotating cylinder in the rotating cylinder, further comprising: a permanent magnet moving unit. A magnetic separation device according to any one of the above. A magnetic force sorting device according to any one of claims 1 to 6,
A wind separation device arranged upstream of the magnetic force separation device, for separating the sorted material by wind power;
A sorting system comprising: A magnetic force sorting device according to any one of claims 1 to 6,
A metal detector arranged downstream of the magnetic force sorting device and detecting non-magnetic metal contained in the sorted material from which the magnetic material has been removed by the magnetic force sorting device,
A non-magnetic metal separation device that separates the non-magnetic metal when the metal detector detects the non-magnetic metal,
A sorting system comprising: A magnetic force sorting device according to any one of claims 1 to 6,
A wind separation device arranged upstream of the magnetic force separation device, for separating the sorted material by wind power;
A metal detector arranged downstream of the magnetic force sorting device and detecting non-magnetic metal contained in the sorted material from which the magnetic material has been removed by the magnetic force sorting device,
A non-magnetic metal separation device that separates the non-magnetic metal when the metal detector detects the non-magnetic metal,
A sorting system comprising:

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