WO2023080256A1 - Apparatus for removing foreign substances from waste plastic - Google Patents

Apparatus for removing foreign substances from waste plastic Download PDF

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Publication number
WO2023080256A1
WO2023080256A1 PCT/JP2022/041606 JP2022041606W WO2023080256A1 WO 2023080256 A1 WO2023080256 A1 WO 2023080256A1 JP 2022041606 W JP2022041606 W JP 2022041606W WO 2023080256 A1 WO2023080256 A1 WO 2023080256A1
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WIPO (PCT)
Prior art keywords
foreign matter
waste plastic
ray
line sensor
waste
Prior art date
Application number
PCT/JP2022/041606
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French (fr)
Japanese (ja)
Inventor
彰則 尾野
Original Assignee
株式会社日本選別化工
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Filing date
Publication date
Priority claimed from JP2022030338A external-priority patent/JP7217560B1/en
Priority claimed from JP2022069900A external-priority patent/JP7157500B1/en
Application filed by 株式会社日本選別化工 filed Critical 株式会社日本選別化工
Publication of WO2023080256A1 publication Critical patent/WO2023080256A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
    • G01N23/087—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays using polyenergetic X-rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/18—Investigating the presence of flaws defects or foreign matter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a waste plastic foreign matter removing device used to remove foreign matter such as metal powder from waste plastic such as collected used plastic bags.
  • Plastic used for food packaging is collected as waste plastic after disposal and reused as raw materials for fuel and plastic products.
  • waste plastics are cut and crushed, then formed into pellets by a granulator, and used as raw materials for fuel and plastic products.
  • the waste plastics are candy bags coated with aluminum vapor deposition or aluminum foil. Bags coated with aluminum vapor deposition or aluminum foil can be sent directly to the plastic recycling process, but if they pass through a metal detector, they will be separated and removed as metal, making it impossible to reuse them.
  • Patent Documents 1 and 2 disclose a foreign matter inspection device that detects foreign matter such as metal mixed in an aluminum vapor-deposited plastic bag as a product.
  • This contaminant inspection device consists of a metal detector that detects contaminants by turbulence in the magnetic field formed by a coil, and an X-ray detector that irradiates X-rays and detects contaminants based on the X-ray data emitted. Detects mixed foreign matter.
  • the foreign matter detectors of Patent Documents 1 and 2 are devices for detecting foreign matter inside aluminum vapor-deposited plastic bags that flow in a food production line, and are different from those that target separately collected waste plastic bags for inspection. .
  • the shape, size, weight, etc. of the aluminum vapor-deposited plastic bags that flow on the production line are well-defined to some extent, and it is possible to detect foreign matter based on a certain range of inspection data.
  • sorted and collected waste plastic bags have various shapes, sizes, and weights, and there are many types of foreign matter, which causes large variations in inspection data. Therefore, the foreign matter detectors of Patent Documents 1 and 2 cannot be used to detect foreign matter in waste plastic collected separately.
  • Patent Document 3 shows a waste plastic sorting device consisting of a magnetic sorting device and a wind sorting device. After removing foreign matter such as iron with a magnetic sorting device, the plastic is separated into high-density plastic and light-weight aluminum-deposited confectionery bags by wind power. Since the aluminum-deposited confectionery bags do not react to the magnetic force of the magnetic force sorting device, they can be sent to the subsequent recycling process without being removed. However, since non-magnetic materials such as stones and stainless steel do not respond to magnetic force, they cannot be separated by the magnetic force sorting device. For this reason, these hard materials are mixed in the waste plastic, and there is a risk that the crusher, the granulator, etc., will be damaged if they are reused. In order to prevent this, a manual sorting process is required.
  • JP 2008-268035 A Japanese Unexamined Patent Application Publication No. 2018-40640 JP 2007-105582 A
  • the present invention has been made in consideration of the above-mentioned problems, and since foreign substances including stainless steel and weak magnetic substances cannot be removed by a magnetic sorter, these foreign substances mixed in waste plastic can be easily removed.
  • a foreign matter removing apparatus for waste plastics capable of surely removing waste plastic bags coated with aluminum vapor deposition or aluminum foil, and supplying the waste plastic bags together with general plastic bags to a recycling process without removing the waste plastic bags. .
  • the apparatus for removing foreign matter from waste plastics of the present invention is an apparatus for removing foreign matters from waste plastics, which removes foreign matters mixed in waste plastics, including plastic bags coated with aluminum vapor deposition or aluminum foil, before the waste plastics are reused.
  • an X-ray device comprising a transport path for transporting the waste plastics, an X-ray source for irradiating the waste plastics being transported on the transport path with X-rays, and a line sensor for receiving the irradiated X-rays;
  • a foreign matter detection unit that detects stainless foreign matter and weakly magnetic foreign matter based on imaging data of a line sensor, and a foreign matter removal unit that removes the stainless foreign matter and weakly magnetic foreign matter detected by the foreign matter detection unit from the conveying path. and, characterized in that the waste plastic including the aluminum-deposited or aluminum-foil-coated plastic bag is supplied to the recycling process.
  • the waste plastic is supplied by a conveying belt, a magnet roll is provided at one end of the conveying belt, and the magnetic foreign matter removing means for removing magnetic foreign matters by the magnetic force of the magnet roll is disposed on the conveying path. It is characterized by being arranged on the upstream side of.
  • the present invention is characterized in that the line sensor is a dual line sensor comprising a first line sensor for receiving high-energy X-rays and a second line sensor for receiving low-energy X-rays.
  • the X-ray apparatus has a box body equipped with an X-ray source for irradiating an object to be inspected with X-rays, casters at the lower end, and an opening into which an existing transport path can be inserted.
  • the openings are provided in the gantry so as to be positioned on two sides of the existing conveying path in the conveying direction, that is, on the upstream side and the downstream side, and the existing conveying path is provided on the other two sides of the cradle.
  • An interference member is provided for interfering with and collapsing the waste plastic placed on the road so that the waste plastic is contained within the X-ray irradiation area of the X-ray source.
  • the interference member is characterized by comprising an interference roller attached obliquely to the other two side surfaces of the mount, and a motor for rotating the interference roller.
  • the present invention is characterized in that the interference roller has an uneven surface.
  • the foreign matter detection unit detects stainless foreign matter and weakly magnetic foreign matter based on the imaging data of the line sensor. Since foreign matter and weakly magnetic foreign matter are removed from the conveying path, damage to the crusher can be prevented. On the other hand, since waste plastic including plastic bags coated with aluminum vapor deposition or aluminum foil is not removed from the transport path, it can be reused together with waste plastic such as general plastic bags, enabling effective utilization of resources. becomes.
  • a waste plastic is supplied by a conveying belt equipped with a magnet roll, and a magnetic foreign matter removing means for removing magnetic foreign matter by the magnetic force of the magnet roll is arranged upstream of the conveying path of the X-ray apparatus. It is possible to reduce the load of removing metallic foreign matter.
  • the line sensor is a dual line sensor consisting of a first line sensor that receives high-energy X-rays and a second line sensor that receives low-energy X-rays. Since the object can be identified and the material can be identified, removal can be performed more reliably than determination based on the density of the image with a single line sensor.
  • the pedestal Since the openings of the pedestal are formed on two sides of the existing belt conveyor in the conveying direction, that is, on the upstream side and the downstream side, the pedestal can be slid and incorporated into the existing belt conveyor easily.
  • the X-ray detector which is a line sensor, can be removed in advance because it is stretched over the pedestal after the existing transport path is inserted into the opening of the pedestal. Since the X-ray detector does not collide with the existing transport path when the frame supporting the box is slid and inserted into the existing transport path, the incorporation of the X-ray apparatus can be greatly facilitated.
  • the interference member Since the interference member is provided, it is possible to interfere with the inspection object and bring the inspection object closer to the X-ray irradiation area of the X-ray generator. To pick up an image of an inspection object without deviating from the X-ray irradiation area even if the inspection object has a large amount.
  • FIG. 1 is a structural diagram of an apparatus for removing foreign matter from waste plastics according to the present invention
  • FIG. It is a figure which shows the example of waste plastic. It is a flow of processing of a foreign object detection unit equipped with a dual line sensor.
  • 1 is a front view of an X-ray device;
  • FIG. It is a right view of an X-ray apparatus.
  • FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path;
  • Example 1 is a front view of a state in which the X-ray device is inserted into an existing transport path;
  • Example 2 FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path;
  • Example 3 FIG.
  • FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path;
  • Example 4 FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path;
  • Example 5 FIG. 4 is an explanatory diagram of a height adjusting member for a line sensor and bypass rollers; This is an example in which an X-ray device is provided at a location where the conveyor crosses. It is the perspective view which looked at the X-ray apparatus used for this invention from the back side.
  • 1 is a front view of an X-ray device;
  • FIG. It is a right view at the time of inserting an X-ray apparatus in the existing belt conveyor.
  • FIG. 19 is a cross-sectional view taken along line AA of FIG. 18;
  • FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18 showing the arrangement of bypass rollers;
  • FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18 showing another form of the detour roller;
  • FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18 showing another form of the detour roller;
  • FIG. 4 is a diagram showing a height adjusting member of an X-ray detector and a height adjusting member of a detour roller; It is a right side view in the state where the X-ray device of another example was incorporated in the existing belt conveyor. It is a right side view before incorporating an X-ray device into an existing belt conveyor.
  • FIG. 3 is a plan view of the X-ray device installed in an existing belt conveyor; It is a front view of the state where the X-ray device was incorporated in the existing belt conveyor. It is a right view of the X-ray apparatus which provided the interference member. It is a right view of the X-ray apparatus for showing another interference member.
  • Metal detectors and magnetic sorters are used to protect crushers and cutters from metal foreign substances in the sorting of metal foreign substances mixed in with recycled plastics. These devices are also used to increase the purity of plastic recycling.
  • aluminum packaging materials such as aluminum vapor deposition and aluminum contamination have increased, and these are repeatedly discharged as foreign matter even when not protecting the crusher, resulting in poor work efficiency.
  • an X-ray device is used as a device that does not react to small aluminum, aluminum foil, and aluminum packaging materials.
  • the advantage of X-rays used for sorting lithium-ion batteries and button batteries is that they can be sorted according to their size and permeability. button batteries and lithium-ion batteries can be sorted.
  • a system capable of ejecting foreign matter with a size and permeability greater than that of a button battery or a lithium ion battery is introduced.
  • X-rays also have the greatest sorting efficacy for glass in recycled plastics.
  • the present invention removes foreign matter from waste plastic that has been discarded in general life and then separately collected, and is used to remove foreign matter in the preceding stage of the recycling process of the separately collected waste plastic.
  • the present invention detects and removes non-magnetic stainless steel foreign matter and weakly magnetic foreign matter mixed in waste plastic, and does not remove waste plastic bags coated with aluminum vapor deposition or aluminum foil. It is a device that can be supplied to the recycling process together with general plastic bags.
  • Non-magnetic stainless steel foreign matter to be removed by the present invention is austenitic stainless steel represented by SUS304, SUS316, and SUS316L, and objects such as bolts, nuts, screws, container lids, and other parts that have been discarded.
  • Foreign matter containing weak magnetic materials includes parts such as pumice stones, paint scum mixed with rust, and pellets and chips in which small parts such as needles and nails are embedded. Other foreign objects such as stones, glass, bolts and nails are removed.
  • SUS304, SUS316, and SUS316L stainless steels have no magnetism when new. However, when rubbed, weak magnetism appears. Even weak magnetism cannot be completely removed by a magnetic sorter, so it is sorted by a sorter equipped with X-rays.
  • FIG. 1 is a structural diagram of a waste plastic foreign matter removing apparatus 100 according to the present invention.
  • the foreign matter removing apparatus 100 for waste plastics includes a conveying path 1 of a belt conveyor, an X-ray device 2 having an X-ray source 5 and a line sensor 9 for capturing an X-ray image, and determining whether or not foreign matter is present based on X-ray imaging data. and a foreign object removing unit 4 made up of a sorting plate. Objects determined to be foreign matter by the foreign matter detection unit 3 are collected in the foreign matter collection box 11 . As shown in FIG.
  • the waste plastic 6 is thrown into the conveying path 1, conveyed from left to right, imaged by the X-ray device 2, and the objects determined as foreign matter by the foreign matter detector 3 are
  • the removing unit 4 rotates to collect the foreign matter in the foreign matter collection box 11 .
  • the waste plastics include plastic bags coated with aluminum vapor deposition or aluminum foil, and the plastic bags coated with aluminum vapor deposition or aluminum foil are collected in the foreign matter collection box 11 as described later. It is supplied to the recycling process by the transport path 1 together with other plastics.
  • the X-ray source 5 consists of a filament (cathode) 7 and a target (anode) 8, and generates high-energy X-rays and low-energy X-rays at the same time.
  • An object of waste plastic 6 is imaged by a line sensor 9 .
  • the line sensor 9 can be a single line sensor or a dual line sensor 9a. When a single line sensor is used, since the waste plastic 6 is a lightweight waste plastic, it is transparent and has a light shadow.
  • the dual line sensor 9a consists of a first line sensor for obtaining a high energy X-ray image (m) and a second line sensor for obtaining a low energy X-ray image (h).
  • the foreign matter detection unit 3 is a part that determines whether or not the target object is a foreign matter based on the density of the captured image.
  • the X-ray apparatus 2 particularly wants to remove foreign matter 12 of non-magnetic stainless steel and foreign matter 13 of weak magnetic material.
  • An example of the weakly magnetic foreign matter 13 is pumice stone.
  • the reason why attention is paid to these foreign substances is that iron foreign substances can be removed in advance by a magnetic force sorter, but non-magnetic stainless steel foreign substances 12 and weakly magnetic foreign substances 13 cannot be removed by a magnetic force sorter. There are many examples of this being done.
  • objects that can be removed with the X-ray device 2 include iron, stainless steel, copper, aluminum, stone, and glass.
  • FIG. 2 is a diagram showing an example of the waste plastic 6.
  • the foreign matter includes a foreign matter 12 made of stainless steel and a foreign matter 13 made of weak magnetic material.
  • the stainless foreign matter 12 includes metal objects using nonmagnetic SUS303, SUS304, SUS316L, and the like.
  • the weakly magnetic foreign matter 13 includes pumice stone.
  • Examples of the waste plastic 6 include a plastic wrap sheet 14, a confectionery bag (aluminum deposition or with aluminum foil) 15, a confectionery bag (aluminum deposition or without aluminum foil) 16, a plastic tray 17, and the like.
  • An aluminum vapor deposition or aluminum foil is indicated by reference numeral 15a.
  • FIG. 2 shows a case where a confectionery bag 16 (with no aluminum vapor deposition or aluminum foil) contains a foreign substance 12 made of stainless steel.
  • a confectionery bag 16 with no aluminum vapor deposition or aluminum foil
  • the foreign matter 12 made of stainless steel can be imaged by X-ray imaging. That is, the stainless steel foreign matter 12 is detected whether it is outside or inside the confectionery bag (aluminum deposition or with aluminum foil) 15 .
  • the magnetic foreign matter removing means 10 is supplied with the waste plastic 6 by a conveying belt 22 having a magnet roll 21 at one end, and the magnetic foreign matter is removed by the magnetic force of the magnet roll 21 .
  • the magnet roll 21 is composed of permanent magnets, and removes the attracted bolts and nuts by dropping them below the conveyor belt 22 . It should be noted that it is difficult to remove weakly magnetic foreign matter even if a strong magnet roll 21 is prepared.
  • FIG. 3 shows the processing flow of the foreign object detection unit 3 equipped with the dual line sensor 9a.
  • m1 to m5 are images of the object in FIG. 2 taken with low-energy X-rays.
  • h1 to h5 are images of the object in FIG. 2 taken with high-energy X-rays. Since low-energy X-rays have a weak penetrating power, for example, when plastic is irradiated, an image with deep shadows is obtained, whereas high-energy X-rays have a strong penetrating power, so an image with light shadows is obtained.
  • the difference between the shades of the two images that is, the difference in the amount of transmitted light is calculated, and it is checked whether the difference matches the previously known material. If they match, the material is specified.
  • the sorting plate of the foreign matter removal unit 4 operates to collect the foreign matter in the foreign matter recovery box 11 .
  • a confectionery bag (aluminum-deposited or without aluminum foil) 16 contains a stainless foreign matter 12
  • the confectionery bag 16 and the stainless foreign matter 12 are collected together in the confectionery collection box 11 by the foreign matter removal unit 4 operating.
  • a nickel-cadmium battery and a lithium battery are examples of the stainless foreign matter 12 . If the case is made of stainless steel and mixed with the waste plastic 6, it may ignite in a post-process, and should be removed as a foreign matter.
  • the confectionery bag 15 (with vapor-deposited aluminum or aluminum foil) has no thickness, but since it is metal, the amount of transmitted light is a little low and there is a shadow. process. In other words, vapor-deposited aluminum or aluminum foil is judged not to be a foreign matter on the basis that it does not damage the grinder. Therefore, the confectionery bag 15 is thrown into the transport path 1 for reuse in the latter stage.
  • the confectionery bag 15 is pulverized and dissolved in a solvent in a subsequent recycling process to separate the aluminum and recover the plastic.
  • the wrap sheet 14 and the plastic tray 17 are also thrown into the transport path 1 for reuse in the latter stage.
  • the pull tab of an aluminum can is determined to be a foreign object because the density is different from the shadow of the confectionery bag (aluminum deposition or aluminum foil) 15 .
  • FIG. 4 is a front view of the X-ray device 2.
  • FIG. The X-ray device 2 consists of a box 23 .
  • the X-ray device 2 is configured to be insertable into an existing transport path (belt conveyor) 1 .
  • a touch display 24 and an operation panel 25 are provided on the front of the box 23, and a patrol lamp 26 and a buzzer (not shown) are provided on the roof to inform an abnormal state of the device.
  • Casters 27 for facilitating movement of the box 2 and level feet 28 for floating the casters 27 are provided at the bottom.
  • FIG. 5 is a right side view of the X-ray device 2.
  • FIG. FIG. 5 shows a state in which the back cover covering the rear and the protective covers covering the left and right sides are opened. In this state, the opening 29 of the box 23 is open.
  • the internal line sensor 9 is positioned near the center of the opening 29 .
  • Line sensor 9 is shown as a single line sensor. According to this, the box 23 can be moved rearward and the X-ray apparatus 2 can be inserted or inserted into the conveying path (belt conveyor) 1 .
  • the existing conveying path (belt conveyor) 1 in the inserted state is indicated by the one-dot chain line in FIG.
  • the X-ray source 5 is located above the box 23 and radiates downward.
  • the light is irradiated so as to cover the width of the conveying path (belt conveyor) 1 .
  • An image processing PC 30 installed at the bottom of the box 23 analyzes the X-ray captured image.
  • the image processing PC 30 corresponds to the foreign object detector 3 in FIG.
  • FIG. 6 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the first embodiment.
  • the transport path (conveyor belt) 1 is shown inside the box 23 but visible.
  • FIG. 6 shows an example in which the line sensor 9 is inserted between the upper belt 1a and the lower belt 1b of the existing conveying path (belt conveyor) 1.
  • FIG. An image processing PC 30 installed at the bottom of the box 23 analyzes the X-ray captured image.
  • FIG. 7 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the second embodiment.
  • the transport path (conveyor belt) 1 is shown inside the box 23 but visible.
  • the line sensor 9 is inserted into the space of the conveying path (belt conveyor) 1 widened by the detour rollers 31 . Since the detour roller 31 pushes down the lower belt 1b to expand the space between it and the upper belt 1a, the line sensor 9 can be easily inserted into the conveying path (belt conveyor) 1 by moving the box 23. - ⁇
  • FIG. 8 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the third embodiment. Since the detour roller 31 pushes up the upper belt 1a to expand the space between it and the lower belt 1b, the line sensor 9 can be easily inserted into the conveying path (belt conveyor) 1 by moving the box 23. - ⁇ That is, the X-ray device 2 can be easily inserted into the conveying path (belt conveyor) 1 .
  • FIG. 9 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the fourth embodiment.
  • the line sensor 9 is positioned above the upper belt 1a of the conveying path (belt conveyor) 1, and the transfer plate 32 is arranged above the line sensor 9. That is, the line sensor 9 is arranged inside the transfer plate 32 . Since the waste plastic 6 placed on the transfer plate 32 is not conveyed, an air blower 33 is provided to blow it forward. A heavy metal piece or the like that is difficult to move forward with the blower 33 is detected by a sensor, a patrol lamp 26 is turned on, and a buzzer is sounded.
  • FIG. 10 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the fifth embodiment.
  • the line sensor 9 was positioned above the upper belt 1a of the conveying path (belt conveyor) 1, and the upper belt 1a pushed down the upper belt 1a with the detour roller 31.
  • a substantially horizontal transfer plate 32 is arranged above the line sensor 9. - ⁇ Since the waste plastic 6 placed on the transfer plate 32 is not conveyed, an air blower 33 is provided to blow it forward. A heavy metal piece or the like that is difficult to move with the blower 33 is detected by a sensor, the patrol lamp 26 is turned on, and a buzzer is sounded.
  • FIG. 11A and 11B are explanatory diagrams of the height adjusting member 40 of the line sensor 9 and the height adjusting member 41 of the detour roller 31.
  • FIG. Both the height adjusting member 40 and the height adjusting member 41 are provided with a slit 35 in the L-shaped support, one end or both ends of the line sensor 9 and the detour roller 31 are vertically movably passed through the slit 35, and the height adjusting screw 34 is It is fixed with
  • the detour roller 31 is preferably rotatable. It is not limited to such a configuration, and a ball screw may be used to enable accurate height adjustment.
  • FIG. 12 is an example in which the X-ray device 2 is provided at a location where the conveyor crosses.
  • the X-ray device 2 can be installed at a location where the first conveying path and the second conveying path cross over the conveyors. Since the space in the height direction is smaller than when the X-ray apparatus 2 is installed at a horizontal portion of the transport path, a step is required on the floor. Since it takes time to move the sorting plate after the detection of the foreign object, the height must be suitable for this time.
  • the X-ray device 2 is installed horizontally.
  • 13 to 31 show examples of an X-ray device 200 for use in the apparatus for removing foreign matter from waste plastics of the present invention.
  • FIG. 13 to 18 show the X-ray apparatus 200 of the first example, which consists of a box 212 including an X-ray generator 202 and a frame 213.
  • the mount 213 is located in the lower part of the box 212 and has a front plate 213a and a rear plate 213b.
  • the bottom surface of the pedestal 213 is provided with casters 227 for facilitating movement and level feet 228 for floating the casters 227 and fixing the pedestal 213 to the floor.
  • the back plate 213b covering the back side of the mount 213, the right side cover 209a covering the right side as the cover member 209, and the left side cover 209b covering the left side are shown in an open state. In this state, the opening 204 of the mount 213 is formed and opened.
  • the opening 204 is formed by an upstream side surface 204a, a downstream side surface 204b, and a front side surface 204c orthogonal to the conveying direction of the belt conveyor 1 (existing conveying path 1).
  • Curtains (not shown) that block X-rays are provided in the recesses of the right side cover 209a and the left side cover 209b to prevent the X-rays from leaking outside.
  • the X-ray source 205 of the X-ray generator 202 is composed of a filament (cathode) and a target (anode) and generates X-rays. X-rays are used to detect foreign substances such as iron and stainless metals, stones, and glass mixed in the inspection objects on the belt conveyor.
  • FIG. 14 is a front view of the X-ray device 200.
  • FIG. A touch display 224 and an operation panel 225 are provided on the front of the box body 212, and a patrol lamp 226 and a buzzer (not shown) are provided on the roof to inform an abnormal state of the apparatus.
  • a right side cover 209a and a left side cover 209b, which constitute the cover member 209, can be opened and closed by hinges 210 (see FIG. 15), as indicated by dashed lines.
  • the rear plate 213b can also be opened and closed with a hinge.
  • FIG. 15 is a right side view when inserting the X-ray device 200 into the existing belt conveyor 1.
  • FIG. In this state the right side cover 209a, the left side cover 209b, and the back plate 213b are opened to form the opening 204.
  • the X-ray detector 203 is composed of a line sensor, is a camera for imaging an object to be inspected, and is detachably provided on a pedestal 213, so it is removed. According to this, the X-ray device 200 is slid and inserted into the existing belt conveyor 1 from the front and back direction, that is, from the direction perpendicular to the conveying direction of the existing belt conveyor 1 .
  • the existing belt conveyor 1 is inserted into the opening 204 .
  • FIG. 16 is a right side view of a state in which the X-ray detector 203 is mounted after the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. The removed X-ray detector 203 is attached so as to bridge the front plate 213a and the rear plate 213b of the gantry 213 .
  • the X-ray detector 203 is installed between the upper belt 1 a and the lower belt 1 b of the existing belt conveyor 1 .
  • FIG. 17 is a right side view of a state in which the right side cover 209a, which is the cover member 209, is closed after the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. The X-ray detector 203 is installed between the upper belt 1 a and the lower belt 1 b of the existing belt conveyor 1 .
  • FIG. 18 is a perspective view showing a state in which the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. The right side cover 209a, the left side cover 209b and the back plate 213b are closed.
  • an object to be inspected placed on the upper belt 1 a is conveyed leftward in the drawing and checked by the X-ray generator 202 .
  • the lower belt 1b returns to the right in the drawing.
  • the existing belt conveyor 1 consists of an upper forward belt 1a and a lower return belt 1b.
  • Curtains 231 are provided at the entrance and exit portions 232 of the right side cover 209a and the left side cover 209b to prevent leakage of X-rays.
  • FIG. 19 is a cross-sectional view taken along line AA of FIG.
  • the X-ray source 205 is inside the X-ray generator 202 and irradiates downward through the inside of the box 212 . It is irradiated so as to cover the width of the existing belt conveyor 1 .
  • the X-ray detector 203 picks up an image of the object to be inspected.
  • the imaging data is sent to the image processing PC 230 installed in the storage box 223 of the gantry 213, and the X-ray imaging image is analyzed. As an example, when a foreign object such as metal or stone is detected, the patrol lamp 226 is turned on and a buzzer is sounded.
  • a foreign object detection signal can be provided to stop the running of the existing belt conveyor 1 and sent to the control section of the existing belt conveyor 1 . According to this, the existing belt conveyor 1 can be immediately stopped.
  • the image processing PC 230 is installed under the pedestal 213 , but it may be installed on the box 212 . In that case, since the lower portion of the mount 213 is wide, the frontage (height) of the opening 204 can be made wider. This is advantageous when the gap between the upper belt 1a and the lower belt 1b of the existing belt conveyor 1 is large, such as a trough type conveyor.
  • FIG. 20 is a cross-sectional view taken along line AA of FIG. 18, showing the arrangement of bypass rollers.
  • the detour roller 207 is detachably provided on the front plate 213 a and the rear plate 213 b of the base 213 .
  • the space between the upper belt 1a and the lower belt 1b is widened by a bypass roller 207, and an X-ray detector 203 is installed between the upper belt 1a and the lower belt 1b. Since the detour roller 207 pushes down the lower belt 1b to expand the space between it and the upper belt 1a, it becomes easy to install the X-ray detector 203 by moving the box 212.
  • FIG. 21 is a cross-sectional view showing another form of the detour roller 207.
  • FIG. 22 is a diagram showing the height adjustment member 240 of the X-ray detector 203 and the height adjustment member 241 of the detour roller 207.
  • FIG. These height adjusting members 240 and 241 are formed by providing a slit 211 in an L-shaped support, passing one end of the X-ray detector 203 and bypass roller 207 through the slit 211 so as to be vertically movable, and fixing them with a height adjusting screw 208. is.
  • the detour roller 207 is rotatably supported.
  • FIG. 23 is a right side view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. The existing belt conveyor 1 uses a trough belt.
  • the upper belt 1a is curved by a belt inclining roller 216 so that the inspection object 215 does not fall off the belt, and conveyor side walls 214, 214 are provided on both sides in the conveying direction of the conveyor. 1 is formed.
  • X-rays emitted from the X-ray source 205 spread downward like an X-ray irradiation area 218 , and the X-ray detector 203 picks up an image of the inspection object 215 .
  • FIG. 24 is a right side view of the X-ray device 200 before being incorporated into the existing belt conveyor 1.
  • the X-ray device 200 comprises a box 212 containing an X-ray generator 202 and a frame 213 .
  • the pedestal 213 is located below the box 212 and has a front plate 213a and a rear plate 213b.
  • the left and right sides are wide open for the existing belt conveyor 1 to pass through. That is, the openings of the pedestal 213 are formed so as to be positioned on two side surfaces (left and right side surfaces) of the existing belt conveyor 1, namely, upstream and downstream.
  • image processing PC 230 is housed in box 212 .
  • Casters 227 and level feet 228 are provided on the bottom surface of the mount 213 .
  • the mount 213 has a front plate 213a and a rear plate 213b, and the rear plate 213b is closed and fixed without being opened and closed.
  • the X-ray detector 203 is detachably spanned between the front plate 213a and the rear plate 213b of the gantry 213 .
  • the X-ray detector 203 is shown removed.
  • the X-ray detector 203 is attached to the frame 213 after the X-ray device 200 is incorporated into the existing belt conveyor 1 . Since the X-ray device 200 has large openings on both left and right sides, it is slid from one end of the existing belt conveyor 1 in the conveying direction.
  • FIG. 25 is a plan view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. An upper front plate 213a and an upper rear plate 213b of the pedestal 213 are shown in an open state. Since the right side cover 209a and the left side cover 209b of the cover member 209 are long, long beams are provided on both front and rear sides of the base 213 to support them.
  • FIG. 26 is a front view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1.
  • FIG. A right side cover 209a and a left side cover 209b are provided on the left and right sides of the X-ray apparatus 200 to cover X-rays so that they do not leak out from the opening.
  • a curtain 231 (see FIG. 18) for blocking X-rays is provided at the entrance and exit portions 232 of the right side cover 209a and the left side cover 209b.
  • a bottom plate 222 is provided at the bottom of the pedestal 213 to cover the bottom of the lower belt 1b and block X-rays.
  • FIG. 27 is a right side view of the X-ray device 200 provided with the interference member 221.
  • FIG. If the object to be inspected is crushed plastic from recycled home appliances, the amount of object 215 to be inspected will be large. When the amount of inspection objects 215 on the existing belt conveyor 1 is large as described above, the inspection objects 215 enter the area outside the conveyor side wall 214 and the X-ray irradiation area 218 . In that case, since the X-ray detector 203 does not pick up an image, it is impossible to detect metal or the like. Therefore, for example, the interference members 221, 221 installed in a V-shape are provided on the frame 213 so as to be suspended from both sides of the upper belt 1a.
  • the interference members 221, 221 are provided so as to be located upstream of the X-ray source 205 in the conveying direction of the existing belt conveyor 1 from directly below the X-ray source 205 in the front view.
  • the interfering members 221 , 221 interfere with the object 215 to be inspected to cause it to collapse, move the object 215 toward the center of the upper belt 1 a and enter the X-ray irradiation area 218 .
  • the interference members 221, 221 use rolls with uneven surfaces. As for the unevenness of the roll, it is sufficient if the surface is rough, and the structure can be appropriately changed to a structure in which a plurality of needles protrude, a structure in which the surface is rough, or the like. By making the surface of the roll uneven, the inspection object 215 can be collapsed.
  • the roll may be rotated by the motor 229, and may be rotated following the transport force of the inspection object 215. FIG.
  • FIG. 28 is a right side view of the X-ray device 200 showing another interference member 221.
  • the interference member 221 is not limited to a roll type interference member, and may be a curved surface having an interference surface as shown in FIG. A curved surface having an interference surface is installed in a V-shape, and the surface facing the center of the upper belt 1a is inclined so as to expand downward, so that it may be installed directly below the X-ray source 205 . As a result, the inspection object 215 can be interfered with and collapsed, and the inspection object 215 can be moved toward the center of the upper belt 1a.
  • FIG. 29 is another example, and is a right side view of a state in which the X-ray device 200 is incorporated in the existing belt conveyor 1.
  • FIG. A flat belt is used for the existing belt conveyor 1 .
  • Conveyor side walls 214, 214 are provided on both sides of the existing belt conveyor 1 in the conveying direction so that the inspection object 215 does not fall off the belt.
  • the inspection objects 215 enter the outer area of the conveyor side wall 214 and the X-ray irradiation area 218, the X-ray detector 203 does not pick up an image, and the metal or the like is detected. Can not.
  • the interference members 221, 221 located upstream of the X-ray source are provided on the gantry 213, and are installed, for example, in a V-shape to interfere with the inspection object 215 to cause the load to collapse, and the center side of the upper belt 1a. so as to enter the X-ray irradiation area.
  • the interference members 221, 221 either one of a roll and a curved surface having an interference surface may be installed, or both may be installed.
  • the rolls may be motorized to rotate and prevent jamming.
  • FIG. 30 shows yet another example.
  • the upper belt 1a and the lower belt 1b are, for example, hinge-connected metal belts, and conveyor side walls 214 are erected on both sides of the upper belt 1a and the lower belt 1b. ing. It is difficult for X-rays to pass through this metal belt.
  • the conveyor side wall 214 is made of a material through which X-rays can be transmitted but is not through which X-rays can be transmitted, the conveyor side wall 214 is partially changed so as to be able to transmit X-rays.
  • a belt conveyor consisting of a hinge-connected metal belt is difficult for X-rays to pass through, so if the X-ray detector 203 is installed between the upper belt 1a and the lower belt 1b, imaging cannot be performed. Therefore, the X-ray detector 203 is arranged at a position above the upper belt 1a so as to be inclined toward the inspection object. As a result, the entire inspection object 215 enters the X-ray irradiation area 218, so that the entire inspection object 215 can be imaged.
  • This example can be applied not only to metal belts but also to resin belts for which X-ray imaging is difficult.
  • FIG. 31 is a right side view of the X-ray device 200 before being incorporated into the existing belt conveyor 1.
  • the X-ray apparatus 200 has casters 227 and level feet 228 on the gantry 213 and has large openings on both left and right sides, so that it can be incorporated by sliding from one end in the longitudinal direction of the existing belt conveyor 1 .
  • the X-ray detector 203 is detachable, it can be incorporated into the existing belt conveyor 1 while attached to the pedestal 213 .
  • illustration of the cover member 209 is omitted, a right side cover 209a and a left side cover 209b are provided on both sides of the pedestal 213 in the same manner as in FIG.
  • the present invention it is possible to reliably remove non-magnetic stainless foreign substances (for example, spoons, knives, nails, etc.) mixed in with waste plastics that are difficult to remove with a magnetic sorter, and it is possible to remove plastic bags made of aluminum vapor deposition or aluminum foil. It is suitable as a foreign matter removing apparatus for waste plastics that can be sent to the recycling process without any waste plastics.
  • non-magnetic stainless foreign substances for example, spoons, knives, nails, etc.

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Abstract

Provided is an apparatus for removing foreign substances from waste plastic, the apparatus being capable of assuredly removing foreign substances such as stainless steel and a feebly-magnetic material mixed in waste plastic, and being able to supply, to a reuse step and together with general plastic bags, aluminum-deposited or aluminum-film-coated bags without removing the same.　This apparatus for removing foreign substances from waste plastic removes foreign substances mixed in waste plastic, which includes aluminum-deposited or aluminum-film-coated plastic bags, in a stage prior to reuse of the waste plastic. The apparatus comprises: a conveyance path for conveying waste plastic; an X-ray device comprising an X-ray source for irradiating waste plastic being conveyed on the conveyance path with X-rays and a line sensor for receiving the radiated X-rays; a foreign substance detection unit for detecting a stainless steel foreign substance and a feebly-magnetic foreign substance on the basis of data of images captured by the line sensor; and a foreign substance removal unit for removing the stainless steel foreign substance and the feebly-magnetic foreign substance detected by the foreign substance detection unit from the conveyance path.

Description

廃プラスチックの異物除去装置Foreign matter removal equipment for waste plastic
　本発明は、回収された使用済みプラスチック袋等の廃プラスチックから金属粉等の異物を除去するために用いられる廃プラスチックの異物除去装置に関する。 The present invention relates to a waste plastic foreign matter removing device used to remove foreign matter such as metal powder from waste plastic such as collected used plastic bags.
　食品等の包装に使用されたプラスチックは、廃棄後に廃プラスチックとして回収され、燃料やプラスチック製品の原料として再利用される。このような再利用では、廃プラスチックを裁断・粉砕した後に造粒装置でペレット状に成形し、燃料やプラスチック製品の原料として使用される。廃プラスチックの中には、アルミ蒸着またはアルミ箔をコーティングした菓子袋がある。アルミ蒸着またはアルミ箔コーティングされた袋は、そのままプラスチックの再利用工程に流せるが、金属探知機を通すと金属として分離除去されるため、再利用することができなくなる。 　Plastic used for food packaging is collected as waste plastic after disposal and reused as raw materials for fuel and plastic products. In such recycling, waste plastics are cut and crushed, then formed into pellets by a granulator, and used as raw materials for fuel and plastic products. Among the waste plastics are candy bags coated with aluminum vapor deposition or aluminum foil. Bags coated with aluminum vapor deposition or aluminum foil can be sent directly to the plastic recycling process, but if they pass through a metal detector, they will be separated and removed as metal, making it impossible to reuse them.
　一方、再利用される前の分別回収では、鉄、ステンレス等の金属屑や小石などの異物が廃プラスチックの内部、外部にかかわりなく混入する。この異物が混入した状態のままで、再利用工程に流すと、粉砕機や造粒装置が損傷するばかりでなく、ペレットの燃焼効率が低下することや燃焼装置が故障する等の不都合が生じるため、鉄やステンレスの異物を除去する必要がある。この場合、アルミ蒸着やアルミ箔コーティングの廃プラスチック袋は一般の廃プラスチック袋と共に再利用の工程に流すことが資源活用の点から良好である。 On the other hand, in sorted collection before reuse, metal scraps such as iron and stainless steel and foreign substances such as pebbles are mixed regardless of whether they are inside or outside the waste plastic. If the pellets are sent to the recycling process with this foreign matter mixed in, not only will the pulverizer and granulator be damaged, but also inconveniences such as reduced pellet combustion efficiency and breakdown of the combustion device will occur. , iron and stainless steel foreign matter must be removed. In this case, it is preferable from the point of view of resource utilization that the waste plastic bags coated with aluminum vapor deposition or aluminum foil be sent to the recycling process together with general waste plastic bags.
　特許文献１及び２には、製品としてのアルミ蒸着のプラスチック袋に混入した金属等の異物を検出する異物検査装置が開示されている。この異物検査装置は、コイルが形成した磁界の乱れによって異物を検出する金属検出機と、Ｘ線を照射し、照射したＸ線データによって異物を検出するＸ線検出機とからなり、プラスチック袋に混入した異物を検出する。 Patent Documents 1 and 2 disclose a foreign matter inspection device that detects foreign matter such as metal mixed in an aluminum vapor-deposited plastic bag as a product. This contaminant inspection device consists of a metal detector that detects contaminants by turbulence in the magnetic field formed by a coil, and an X-ray detector that irradiates X-rays and detects contaminants based on the X-ray data emitted. Detects mixed foreign matter.
　これらの異物検出装置では、アルミ蒸着したプラスチック袋を異物として検出することなく、袋内の異物を検出する必要があり、そのための制御が必要となっている。このため、例えば、特許文献１においては、金属検出がなされる場合には、検出金属が袋に含まれるか否かを判断し、袋に含まれる金属と判断される場合には、濃度領域を金属検出に適した領域に設定し、袋に含まれない金属であると判断される場合には、濃度領域を金属以外の異物検出に適した領域に設定している。このため、金属検出機及びＸ線検出器を併用した構造では、異物検出のための制御が複雑であり、しかも構造が複雑となる問題がある。 These foreign matter detection devices need to detect foreign matter inside the bag without detecting aluminum-deposited plastic bags as foreign matter, and control for this is required. For this reason, for example, in Patent Document 1, when metal detection is performed, it is determined whether or not the detected metal is contained in the bag, and when it is determined that the detected metal is contained in the bag, the concentration region is determined. A region suitable for metal detection is set, and if it is determined that the metal is not contained in the bag, the density region is set to a region suitable for foreign matter detection other than metal. Therefore, in a structure using both a metal detector and an X-ray detector, there is a problem that the control for foreign matter detection is complicated and the structure is complicated.
　特許文献1及び２の異物検出装置は、食品製造ラインで流れるアルミ蒸着のプラスチック袋の内部の異物を検出する装置であり、分別回収された廃プラスチック袋を検査対象とするものとは異なっている。製造ラインで流れるアルミ蒸着のプラスチック袋は形状や大きさ、重さ等の状態がある程度整っており、一定範囲の検査データによって異物の検出が可能である。一方、分別回収された廃プラスチック袋では、種々の形状や大きさ、重量がまちまちであり、異物の種類も多種となっており、検査データに大きなばらつきを生じる。従って、特許文献１及び２の異物検出装置を分別回収された廃プラスチックの異物検出に用いることはできない。 The foreign matter detectors of Patent Documents 1 and 2 are devices for detecting foreign matter inside aluminum vapor-deposited plastic bags that flow in a food production line, and are different from those that target separately collected waste plastic bags for inspection. . The shape, size, weight, etc. of the aluminum vapor-deposited plastic bags that flow on the production line are well-defined to some extent, and it is possible to detect foreign matter based on a certain range of inspection data. On the other hand, sorted and collected waste plastic bags have various shapes, sizes, and weights, and there are many types of foreign matter, which causes large variations in inspection data. Therefore, the foreign matter detectors of Patent Documents 1 and 2 cannot be used to detect foreign matter in waste plastic collected separately.
　特許文献３には、磁力選別装置と風力選別装置からなる廃プラスチックの選別装置が示される。磁力選別装置で鉄などの異物を除去した後、風力で高比重のプラスチックとアルミ蒸着した菓子袋の軽量プラスチックに分けている。アルミ蒸着した菓子袋は、磁力選別装置の磁力には反応しないので、除去されることなく後工程である再利用工程に流すことができる。しかしながら、石などの非磁性体やステンレスなどは磁力に反応しないため磁力選別装置では分離されない。このため、これらの硬質材料が廃プラスチックの中に混入しており、再利用に供すると、粉砕機や造粒装置などが損傷するおそれがある。これを防止するためには、人手による選別工程を必要としている。 Patent Document 3 shows a waste plastic sorting device consisting of a magnetic sorting device and a wind sorting device. After removing foreign matter such as iron with a magnetic sorting device, the plastic is separated into high-density plastic and light-weight aluminum-deposited confectionery bags by wind power. Since the aluminum-deposited confectionery bags do not react to the magnetic force of the magnetic force sorting device, they can be sent to the subsequent recycling process without being removed. However, since non-magnetic materials such as stones and stainless steel do not respond to magnetic force, they cannot be separated by the magnetic force sorting device. For this reason, these hard materials are mixed in the waste plastic, and there is a risk that the crusher, the granulator, etc., will be damaged if they are reused. In order to prevent this, a manual sorting process is required.
特開２００８－２６８０３５号公報JP 2008-268035 A 特開２０１８―４０６４０号公報Japanese Unexamined Patent Application Publication No. 2018-40640 特開２００７―１０５５８２号公報JP 2007-105582 A
　本発明は、上記の問題点を考慮してなされたものであり、ステンレスの異物及び弱磁性体を含む異物は、磁力選別機では除去できないので、廃プラスチックに混入しているこれらの異物を簡単且つ確実に除去でき、アルミ蒸着やアルミ箔コーティングの廃プラスチック袋は除去することなく一般のプラスチック袋と共に再利用工程に供給する処理が可能な廃プラスチックの異物除去装置を提供することを目的とする。 The present invention has been made in consideration of the above-mentioned problems, and since foreign substances including stainless steel and weak magnetic substances cannot be removed by a magnetic sorter, these foreign substances mixed in waste plastic can be easily removed. To provide a foreign matter removing apparatus for waste plastics capable of surely removing waste plastic bags coated with aluminum vapor deposition or aluminum foil, and supplying the waste plastic bags together with general plastic bags to a recycling process without removing the waste plastic bags. .
　本発明の廃プラスチックの異物除去装置は、アルミ蒸着またはアルミ箔コーティングされたプラスチック袋を含む廃プラスチックに混入した異物を前記廃プラスチックを再利用する前段階で除去する廃プラスチックの異物除去装置であって、前記廃プラスチックを搬送する搬送路と、前記搬送路上を搬送中の廃プラスチックにＸ線を照射するＸ線源と、照射されたＸ線を受けるラインセンサーとからなるＸ線装置と、前記ラインセンサーの撮像データに基づいてステンレスの異物及び弱磁性体の異物を検出する異物検出部と、前記異物検出部が検出したステンレスの異物及び弱磁性体の異物を前記搬送路から除く異物除去部と、を備え、前記アルミ蒸着またはアルミ箔コーティングされたプラスチック袋を含む廃プラスチックを前記再利用工程に供給することを特徴とする。 The apparatus for removing foreign matter from waste plastics of the present invention is an apparatus for removing foreign matters from waste plastics, which removes foreign matters mixed in waste plastics, including plastic bags coated with aluminum vapor deposition or aluminum foil, before the waste plastics are reused. an X-ray device comprising a transport path for transporting the waste plastics, an X-ray source for irradiating the waste plastics being transported on the transport path with X-rays, and a line sensor for receiving the irradiated X-rays; A foreign matter detection unit that detects stainless foreign matter and weakly magnetic foreign matter based on imaging data of a line sensor, and a foreign matter removal unit that removes the stainless foreign matter and weakly magnetic foreign matter detected by the foreign matter detection unit from the conveying path. and, characterized in that the waste plastic including the aluminum-deposited or aluminum-foil-coated plastic bag is supplied to the recycling process.
　本発明では、前記廃プラスチックが搬送ベルトで供給され、該搬送ベルトの一端にマグネットロールが設けられおり、前記マグネットロールの磁力によって磁性体の異物を除去する磁性体異物除去手段が、前記搬送路の上流側に配置されていることを特徴とする。 In the present invention, the waste plastic is supplied by a conveying belt, a magnet roll is provided at one end of the conveying belt, and the magnetic foreign matter removing means for removing magnetic foreign matters by the magnetic force of the magnet roll is disposed on the conveying path. It is characterized by being arranged on the upstream side of.
本発明では、前記ラインセンサーは、高エネルギーのＸ線を受ける第１のラインセンサーと、低エネルギーのＸ線を受ける第２のラインセンサーからなるデュアルラインセンサーであることを特徴とする。 The present invention is characterized in that the line sensor is a dual line sensor comprising a first line sensor for receiving high-energy X-rays and a second line sensor for receiving low-energy X-rays.
本発明では、前記Ｘ線装置は、検査対象物にＸ線を照射するＸ線源を備えた箱体と、下端にキャスターを有し、既設の搬送路が差し込み可能な開口部が形成されて前記箱体を支持する架台と、を備え、前記ラインセンサーは、前記架台の開口部に既設の搬送路が差し込まれた後に、前記Ｘ線源との対応位置となるように前記架台に着脱可能に掛け渡されることを特徴する。 In the present invention, the X-ray apparatus has a box body equipped with an X-ray source for irradiating an object to be inspected with X-rays, casters at the lower end, and an opening into which an existing transport path can be inserted. a pedestal for supporting the box, wherein the line sensor is attachable to and detachable from the pedestal so as to be positioned corresponding to the X-ray source after an existing transport path is inserted into the opening of the pedestal. It is characterized by being passed over.
本発明では、前記開口部は、前記既設の搬送路の搬送方向の上流側及び下流側の二側面に位置するように前記架台に設けられ、前記架台の他の二側面には前記既設の搬送路上に設置されている廃プラスチックに干渉して荷崩れさせることにより前記廃プラスチックを前記Ｘ線源のＸ線照射領域に収める干渉部材が設けられていることを特徴とする。
本発明では、前記干渉部材は、前記架台の他の二側面に斜め方向を向いて取り付けられた干渉ローラと、干渉ローラを回転させるモータとを備えていることを特徴とする。
本発明では、前記干渉ローラの表面が凹凸面となっていることを特徴とする。 In the present invention, the openings are provided in the gantry so as to be positioned on two sides of the existing conveying path in the conveying direction, that is, on the upstream side and the downstream side, and the existing conveying path is provided on the other two sides of the cradle. An interference member is provided for interfering with and collapsing the waste plastic placed on the road so that the waste plastic is contained within the X-ray irradiation area of the X-ray source.
In the present invention, the interference member is characterized by comprising an interference roller attached obliquely to the other two side surfaces of the mount, and a motor for rotating the interference roller.
The present invention is characterized in that the interference roller has an uneven surface.
　本発明の廃プラスチックの異物除去装置によれば、ラインセンサーの撮像データに基づいて異物検出部がステンレスの異物及び弱磁性体の異物を検出し、該検出結果に基づいて異物除去部がステンレスの異物及び弱磁性体の異物を搬送路から除くため、粉砕機が損傷することを防止できる。一方、アルミ蒸着やアルミ箔コーティングされたプラスチック袋等を含んだ廃プラスチックは搬送路から除かれないので、一般のプラスチック袋等の廃プラスチックと共に再利用に供することができ、資源の有効活用が可能となる。 According to the waste plastic foreign matter removing apparatus of the present invention, the foreign matter detection unit detects stainless foreign matter and weakly magnetic foreign matter based on the imaging data of the line sensor. Since foreign matter and weakly magnetic foreign matter are removed from the conveying path, damage to the crusher can be prevented. On the other hand, since waste plastic including plastic bags coated with aluminum vapor deposition or aluminum foil is not removed from the transport path, it can be reused together with waste plastic such as general plastic bags, enabling effective utilization of resources. becomes.
　マグネットロールを備えた搬送ベルトで廃プラスチックを供給し、マグネットロールの磁力によって磁性体の異物を除去する磁性体異物除去手段を、Ｘ線装置の搬送路の上流側に配置したので、Ｘ線装置の金属異物を除去する負荷を減らすことができる。 A waste plastic is supplied by a conveying belt equipped with a magnet roll, and a magnetic foreign matter removing means for removing magnetic foreign matter by the magnetic force of the magnet roll is arranged upstream of the conveying path of the X-ray apparatus. It is possible to reduce the load of removing metallic foreign matter.
　ラインセンサーは、高エネルギーのＸ線を受ける第１のラインセンサーと、低エネルギーのＸ線を受ける第２のラインセンサーからなるデュアルラインセンサーであるので、２つの画像の差分をとることによりステンレスであることが特定でき、材質がわかるので、単一のラインセンサーでの画像の濃淡で判定するよりも確実な除去ができる。 The line sensor is a dual line sensor consisting of a first line sensor that receives high-energy X-rays and a second line sensor that receives low-energy X-rays. Since the object can be identified and the material can be identified, removal can be performed more reliably than determination based on the density of the image with a single line sensor.
架台の開口部を既設ベルトコンベアの搬送方向の上流側及び下流側の二側面に位置するように形成したので、架台をスライドして、既設ベルトコンベアへの組み込みを容易に行うことができる。また、ラインセンサーからなるＸ線検出器は、既設の搬送路が架台の開口部に差し込まれた後に、架台に掛け渡されるので、あらかじめ外しておくことができる。箱体を支持した架台を既設の搬送路にスライドして差し込む際には、Ｘ線検出器が既設の搬送路にぶつからないから、Ｘ線装置の組み込みを格段に容易にできる。 Since the openings of the pedestal are formed on two sides of the existing belt conveyor in the conveying direction, that is, on the upstream side and the downstream side, the pedestal can be slid and incorporated into the existing belt conveyor easily. In addition, the X-ray detector, which is a line sensor, can be removed in advance because it is stretched over the pedestal after the existing transport path is inserted into the opening of the pedestal. Since the X-ray detector does not collide with the existing transport path when the frame supporting the box is slid and inserted into the existing transport path, the incorporation of the X-ray apparatus can be greatly facilitated.
　干渉部材を設けたので、検査対象物に干渉して、検査対象物をＸ線発生器のＸ線照射領域に寄せることができる。検査対象物の量が多くてもＸ線照射領域から外れないようにして検査対象物の撮像ができる。 Since the interference member is provided, it is possible to interfere with the inspection object and bring the inspection object closer to the X-ray irradiation area of the X-ray generator. To pick up an image of an inspection object without deviating from the X-ray irradiation area even if the inspection object has a large amount.
本発明による廃プラスチックの異物除去装置の構造図である。1 is a structural diagram of an apparatus for removing foreign matter from waste plastics according to the present invention; FIG. 廃プラスチックの例を示す図である。It is a figure which shows the example of waste plastic. デュアルラインセンサーを備えた異物検出部の処理の流れである。It is a flow of processing of a foreign object detection unit equipped with a dual line sensor. Ｘ線装置の正面図である。1 is a front view of an X-ray device; FIG. Ｘ線装置の右側面図である。It is a right view of an X-ray apparatus. Ｘ線装置を既設の搬送路に差し込んだ状態の正面図である。実施例１FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path; Example 1 Ｘ線装置を既設の搬送路に差し込んだ状態の正面図である。実施例２FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path; Example 2 Ｘ線装置を既設の搬送路に差し込んだ状態の正面図である。実施例３FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path; Example 3 Ｘ線装置を既設の搬送路に差し込んだ状態の正面図である。実施例４FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path; Example 4 Ｘ線装置を既設の搬送路に差し込んだ状態の正面図である。実施例５FIG. 4 is a front view of a state in which the X-ray device is inserted into an existing transport path; Example 5 ラインセンサー及び迂回ローラの高さ調節部材の説明図である。FIG. 4 is an explanatory diagram of a height adjusting member for a line sensor and bypass rollers; コンベア渡りする箇所にＸ線装置を設けた例である。This is an example in which an X-ray device is provided at a location where the conveyor crosses. 本発明に用いるＸ線装置を背面側から見た斜視図である。It is the perspective view which looked at the X-ray apparatus used for this invention from the back side. Ｘ線装置の正面図である。1 is a front view of an X-ray device; FIG. Ｘ線装置を既設ベルトコンベアに差し込む際の右側面図である。It is a right view at the time of inserting an X-ray apparatus in the existing belt conveyor. Ｘ線装置を既設ベルトコンベアに組み込んだ後、Ｘ線検出器を装着した状態の右側面図である。After incorporating the X-ray device into the existing belt conveyor, it is a right side view of the state where the X-ray detector is attached. Ｘ線装置を既設ベルトコンベアに組み込んだ後、カバー部材を閉じた状態の右側面図である。After installing the X-ray device in the existing belt conveyor, it is a right side view in a state where the cover member is closed. Ｘ線装置を既設ベルトコンベアに組み込んだ状態の斜視図である。It is a perspective view of the state where the X-ray device was incorporated in the existing belt conveyor. 図１８のＡ－Ａ線断面図である。FIG. 19 is a cross-sectional view taken along line AA of FIG. 18; 迂回ローラの配置を示す図１８のＡ－Ａ線断面図である。FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18 showing the arrangement of bypass rollers; 迂回ローラの別の形態を示す図１８のＡ－Ａ線断面図である。FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18 showing another form of the detour roller; Ｘ線検出器の高さ調整部材と、迂回ローラの高さ調整部材を示す図である。FIG. 4 is a diagram showing a height adjusting member of an X-ray detector and a height adjusting member of a detour roller; 別例のＸ線装置を既設ベルトコンベアに組み込んだ状態の右側面図である。It is a right side view in the state where the X-ray device of another example was incorporated in the existing belt conveyor. Ｘ線装置を既設ベルトコンベアに組み込む前の右側面図である。It is a right side view before incorporating an X-ray device into an existing belt conveyor. Ｘ線装置を既設ベルトコンベアに組み込んだ状態の平面図である。FIG. 3 is a plan view of the X-ray device installed in an existing belt conveyor; Ｘ線装置を既設ベルトコンベアに組み込んだ状態の正面図である。It is a front view of the state where the X-ray device was incorporated in the existing belt conveyor. 干渉部材を設けたＸ線装置の右側面図である。It is a right view of the X-ray apparatus which provided the interference member. 他の干渉部材を示すためのＸ線装置の右側面図である。It is a right view of the X-ray apparatus for showing another interference member. さらに別例のＸ線装置を既設ベルトコンベアに組み込んだ状態の右側面図である。Furthermore, it is a right side view of the state which incorporated the X-ray apparatus of another example into the existing belt conveyor. Ｘ線装置を既設ベルトコンベアに組み込んだ状態の右側面図である。It is a right side view of the state where the X-ray device was incorporated in the existing belt conveyor. Ｘ線装置を既設ベルトコンベアに組み込む前の右側面図である。It is a right side view before incorporating an X-ray device into an existing belt conveyor.
　リサイクルプラスチックに混在している金属異物の選別では、金属異物から破砕機やカット機を保護するために金属検出機やマグネット選別機を使用している。これらの装置は、プラスチックリサイクルの純度を上げるためにも使用している。これに対し、昨今、アルミ蒸着等のアルミ包材やアルミ混入が増え、これらは破砕機保護以外でも異物としての排出を繰り返すため、作業の効率が悪くなっている。これを防止するため、小さいアルミやアルミ箔、アルミ包材に対して反応しない装置としてＸ線装置を使用するものである。リチウムイオン電池やボタン電池の選別に用いるＸ線の利点は、物の大きさ、透過度により選別できる点であり、例として細長い針金（洗濯ばさみに用いられている針金等）や小さい金属は選別せず、ボタン電池、リチウムイオン電池は選別することができる。ここで、ボタン電池以上、リチウムイオン電池以上の大きさ、透過度の異物を排出できるシステムを導入するものである。加えて、Ｘ線はリサイクルプラスチック内のガラスに対しても最大の選別効力を有している。
　本発明は、一般生活で廃棄され、その後に分別回収された廃プラスチックから異物を除去するものであり、分別回収された廃プラスチックの再利用工程の前段階で異物を除去するために用いられる。特に、本発明は、廃プラスチックに混入している非磁性ステンレスの異物及び弱磁性体の異物を検出して除去すると共に、アルミ蒸着またはアルミ箔コーティングされた廃プラスチック袋は除去されることなく、一般のプラスチック袋と共に再利用工程に供給することができる装置である。 Metal detectors and magnetic sorters are used to protect crushers and cutters from metal foreign substances in the sorting of metal foreign substances mixed in with recycled plastics. These devices are also used to increase the purity of plastic recycling. On the other hand, in recent years, aluminum packaging materials such as aluminum vapor deposition and aluminum contamination have increased, and these are repeatedly discharged as foreign matter even when not protecting the crusher, resulting in poor work efficiency. In order to prevent this, an X-ray device is used as a device that does not react to small aluminum, aluminum foil, and aluminum packaging materials. The advantage of X-rays used for sorting lithium-ion batteries and button batteries is that they can be sorted according to their size and permeability. button batteries and lithium-ion batteries can be sorted. Here, a system capable of ejecting foreign matter with a size and permeability greater than that of a button battery or a lithium ion battery is introduced. In addition, X-rays also have the greatest sorting efficacy for glass in recycled plastics.
The present invention removes foreign matter from waste plastic that has been discarded in general life and then separately collected, and is used to remove foreign matter in the preceding stage of the recycling process of the separately collected waste plastic. In particular, the present invention detects and removes non-magnetic stainless steel foreign matter and weakly magnetic foreign matter mixed in waste plastic, and does not remove waste plastic bags coated with aluminum vapor deposition or aluminum foil. It is a device that can be supplied to the recycling process together with general plastic bags.
　本発明の除去対象となる非磁性ステンレスの異物としては、ＳＵＳ３０４、ＳＵＳ３１６、ＳＵＳ３１６Ｌに代表されるオーステナイト系ステンレスであり、ボルト・ナット、ねじ、容器蓋等の部品として廃棄されたものが対象である。弱磁性体を含む異物としては、軽石、錆混入塗料カス、針や釘などの小部品が埋設されたペレットやチップなどの部品が対象である。これ以外の異物として石、ガラス、ボルトや釘等の鉄屑を除去する。ＳＵＳ３０４、ＳＵＳ３１６、ＳＵＳ３１６Ｌのステンレスは、新品状態では磁性はない。しかし擦ったりすると弱い磁性が出る。弱い磁性があっても、磁力選別機では完全に除去できないので、Ｘ線を備えた選別機で選別する。 Non-magnetic stainless steel foreign matter to be removed by the present invention is austenitic stainless steel represented by SUS304, SUS316, and SUS316L, and objects such as bolts, nuts, screws, container lids, and other parts that have been discarded. . Foreign matter containing weak magnetic materials includes parts such as pumice stones, paint scum mixed with rust, and pellets and chips in which small parts such as needles and nails are embedded. Other foreign objects such as stones, glass, bolts and nails are removed. SUS304, SUS316, and SUS316L stainless steels have no magnetism when new. However, when rubbed, weak magnetism appears. Even weak magnetism cannot be completely removed by a magnetic sorter, so it is sorted by a sorter equipped with X-rays.
　以下、図面を参照して、本発明による廃プラスチックの異物除去装置を説明する。 The device for removing foreign matter from waste plastics according to the present invention will be described below with reference to the drawings.
　図１は、本発明による廃プラスチックの異物除去装置１００の構造図である。廃プラスチックの異物除去装置１００は、ベルトコンベアの搬送路１と、Ｘ線源５とラインセンサー９を備えてＸ線の画像を撮像するＸ線装置２と、Ｘ線の撮像データから異物かどうかを判定する異物検出部３と、振分け板からなる異物除去部４と、を備える。異物検出部３が異物と判定した対象物が異物回収箱１１に回収される。図１に示すように、廃プラスチック６は、搬送路１に投入され、左から右の方向に搬送され、Ｘ線装置２で撮像され、異物検出部３が異物と判定した対象物は、異物除去部４が回動し、異物回収箱１１に回収する。  本発明において、廃プラスチックとしてはアルミ蒸着またはアルミ箔コーティングされたプラスチック袋を含むものであり、アルミ蒸着またはアルミ箔コーティングされたプラスチック袋は、後述するように、異物回収箱１１に回収されることなく、他のプラスチックと共に搬送路１によって再利用工程に供給される。 FIG. 1 is a structural diagram of a waste plastic foreign matter removing apparatus 100 according to the present invention. The foreign matter removing apparatus 100 for waste plastics includes a conveying path 1 of a belt conveyor, an X-ray device 2 having an X-ray source 5 and a line sensor 9 for capturing an X-ray image, and determining whether or not foreign matter is present based on X-ray imaging data. and a foreign object removing unit 4 made up of a sorting plate. Objects determined to be foreign matter by the foreign matter detection unit 3 are collected in the foreign matter collection box 11 . As shown in FIG. 1, the waste plastic 6 is thrown into the conveying path 1, conveyed from left to right, imaged by the X-ray device 2, and the objects determined as foreign matter by the foreign matter detector 3 are The removing unit 4 rotates to collect the foreign matter in the foreign matter collection box 11 . In the present invention, the waste plastics include plastic bags coated with aluminum vapor deposition or aluminum foil, and the plastic bags coated with aluminum vapor deposition or aluminum foil are collected in the foreign matter collection box 11 as described later. It is supplied to the recycling process by the transport path 1 together with other plastics.
　Ｘ線源５は、フィラメント（陰極）７と、ターゲット（陽極）８からなり、高エネルギーのＸ線と低エネルギーのＸ線が同時に発生される。廃プラスチック６の対象物は、ラインセンサー９で撮像される。ラインセンサー９は、単一のラインセンサー又はデュアルラインセンサー９ａが使用できる。単一のラインセンサーにした場合、廃プラスチック６が軽量の廃プラスチックなので、透過して影が薄いものとなり、ステンレスや石は影が濃いので、異物と判定できる。デュアルラインセンサー９ａは、高エネルギーのＸ線の画像（ｍ）を得る第１のラインセンサーと、低エネルギーのＸ線の画像（ｈ）を得る第２のラインセンサーの２つからなる。２つの画像の差分（ｈ－ｍ）は、対象物によって異なるので、この値から材質を特定することができる。画像の濃淡のみで対象物を判定する場合より確実な分別ができる。異物検出部３は、撮像した画像の濃淡から対象物が異物かどうかを判定する部位である。Ｘ線装置２として特に異物として除去したいのは、非磁性のステンレスの異物１２と弱磁性体の異物１３である。弱磁性体の異物１３の例としては軽石がある。これらの異物に注目するのは、鉄の異物は磁力選別機で事前に除去できるが、非磁性のステンレスの異物１２と弱磁性体の異物１３は磁力選別機での除去ができないからで、混入される例も多い。一般に、Ｘ線装置２で除去できる対象物には、鉄、ステンレス、銅、アルミニウム、石、それにガラスなどがある。 The X-ray source 5 consists of a filament (cathode) 7 and a target (anode) 8, and generates high-energy X-rays and low-energy X-rays at the same time. An object of waste plastic 6 is imaged by a line sensor 9 . The line sensor 9 can be a single line sensor or a dual line sensor 9a. When a single line sensor is used, since the waste plastic 6 is a lightweight waste plastic, it is transparent and has a light shadow. The dual line sensor 9a consists of a first line sensor for obtaining a high energy X-ray image (m) and a second line sensor for obtaining a low energy X-ray image (h). Since the difference (h−m) between the two images differs depending on the object, the material can be identified from this value. More reliable classification can be achieved than in the case of judging an object only by the shading of the image. The foreign matter detection unit 3 is a part that determines whether or not the target object is a foreign matter based on the density of the captured image. The X-ray apparatus 2 particularly wants to remove foreign matter 12 of non-magnetic stainless steel and foreign matter 13 of weak magnetic material. An example of the weakly magnetic foreign matter 13 is pumice stone. The reason why attention is paid to these foreign substances is that iron foreign substances can be removed in advance by a magnetic force sorter, but non-magnetic stainless steel foreign substances 12 and weakly magnetic foreign substances 13 cannot be removed by a magnetic force sorter. There are many examples of this being done. In general, objects that can be removed with the X-ray device 2 include iron, stainless steel, copper, aluminum, stone, and glass.
　図２は、廃プラスチック６の例を示す図である。異物にはステンレスの異物１２や、弱磁性体の異物１３がある。ステンレスの異物１２には、非磁性のＳＵＳ３０３、ＳＵＳ３０４、ＳＵＳ３１６Ｌなどを使用した金属物がある。弱磁性体の異物１３には軽石がある。廃プラスチック６の例としては、ラップシート１４、菓子袋（アルミ蒸着又はアルミ箔あり）１５、菓子袋（アルミ蒸着又はアルミ箔なし）１６、プラスチックトレイ１７などがある。アルミ蒸着又はアルミ箔を符号１５ａで示す。図２では、菓子袋（アルミ蒸着又はアルミ箔なし）１６の中にステンレスの異物１２がある場合を示す。このような場合、菓子袋の外から中が見えないとしてもＸ線で撮像するので、ステンレスの異物１２が撮像できる。すなわち、ステンレスの異物１２は、菓子袋（アルミ蒸着又はアルミ箔あり）１５の外側にあっても、内側にあっても検出する。 FIG. 2 is a diagram showing an example of the waste plastic 6. The foreign matter includes a foreign matter 12 made of stainless steel and a foreign matter 13 made of weak magnetic material. The stainless foreign matter 12 includes metal objects using nonmagnetic SUS303, SUS304, SUS316L, and the like. The weakly magnetic foreign matter 13 includes pumice stone. Examples of the waste plastic 6 include a plastic wrap sheet 14, a confectionery bag (aluminum deposition or with aluminum foil) 15, a confectionery bag (aluminum deposition or without aluminum foil) 16, a plastic tray 17, and the like. An aluminum vapor deposition or aluminum foil is indicated by reference numeral 15a. FIG. 2 shows a case where a confectionery bag 16 (with no aluminum vapor deposition or aluminum foil) contains a foreign substance 12 made of stainless steel. In such a case, even if the inside of the confectionery bag cannot be seen from the outside, the foreign matter 12 made of stainless steel can be imaged by X-ray imaging. That is, the stainless steel foreign matter 12 is detected whether it is outside or inside the confectionery bag (aluminum deposition or with aluminum foil) 15 .
　鉄の異物２２、例えばボルトやナットはＸ線で検知できるが、Ｘ線装置２の負荷を減らすため、図１に示すように、Ｘ線装置２の搬送路１の上流に磁性体異物除去手段１０を配置した。磁性体異物除去手段１０は、廃プラスチック６が一端にマグネットロール２１を備えた搬送ベルト２２で供給され、マグネットロール２１の磁力によって磁性体の異物を除去する。マグネットロール２１は永久磁石で構成され、吸着したボルトやナットを搬送ベルト２２の下方に落下させることで除去する。なお、弱磁性体の異物は、強力なマグネットロール２１を用意しても除去が難しい。 Iron foreign matter 22, such as bolts and nuts, can be detected by X-rays. 10 were placed. The magnetic foreign matter removing means 10 is supplied with the waste plastic 6 by a conveying belt 22 having a magnet roll 21 at one end, and the magnetic foreign matter is removed by the magnetic force of the magnet roll 21 . The magnet roll 21 is composed of permanent magnets, and removes the attracted bolts and nuts by dropping them below the conveyor belt 22 . It should be noted that it is difficult to remove weakly magnetic foreign matter even if a strong magnet roll 21 is prepared.
　図３は、デュアルラインセンサー９ａを備えた異物検出部３の処理の流れである。ｍ1～ｍ５は、図２の対象物を低エネルギーのＸ線で撮像した画像である。ｈ１～ｈ５は、図２の対象物を高エネルギーのＸ線で撮像した画像である。低エネルギーのＸ線は、透過する力が弱いので、例えばプラスチックに照射すると、影の濃い画像が得られ、高エネルギーのＸ線では透過する力が強いので、影の薄い画像が得られる。２つの画像の濃淡すなわち透過光量の差を計算し、その差が事前に把握している材料と一致するか調べる。一致すれば、材質が特定される。 FIG. 3 shows the processing flow of the foreign object detection unit 3 equipped with the dual line sensor 9a. m1 to m5 are images of the object in FIG. 2 taken with low-energy X-rays. h1 to h5 are images of the object in FIG. 2 taken with high-energy X-rays. Since low-energy X-rays have a weak penetrating power, for example, when plastic is irradiated, an image with deep shadows is obtained, whereas high-energy X-rays have a strong penetrating power, so an image with light shadows is obtained. The difference between the shades of the two images, that is, the difference in the amount of transmitted light is calculated, and it is checked whether the difference matches the previously known material. If they match, the material is specified.
　図３に示すように、異物検出部３が対象物をステンレスの異物１２と判定する場合は、異物除去部４の振分け板が作動して、異物を異物回収箱１１に回収する。菓子袋（アルミ蒸着又はアルミ箔なし）１６の中にステンレスの異物１２があると、異物除去部４が作動して、菓子袋１６とステンレスの異物１２を一緒に異物回収箱１１に回収する。ステンレスの異物１２が菓子袋１６の外部にあっても、菓子袋１６とステンレスの異物１２が異物回収箱１１に回収される。ステンレスの異物１２としてニッカド電池やリチウム電池がある。ケースがステンレス製で廃プラスチック６に混入していると、後工程で発火することにもなり、異物として除去すべき対象となる。 As shown in FIG. 3 , when the foreign matter detection unit 3 determines that the object is a stainless foreign matter 12 , the sorting plate of the foreign matter removal unit 4 operates to collect the foreign matter in the foreign matter recovery box 11 . When a confectionery bag (aluminum-deposited or without aluminum foil) 16 contains a stainless foreign matter 12, the confectionery bag 16 and the stainless foreign matter 12 are collected together in the confectionery collection box 11 by the foreign matter removal unit 4 operating. Even if the stainless foreign matter 12 is outside the candy bag 16, the candy bag 16 and the stainless foreign matter 12 are collected in the foreign matter recovery box 11.例文帳に追加A nickel-cadmium battery and a lithium battery are examples of the stainless foreign matter 12 . If the case is made of stainless steel and mixed with the waste plastic 6, it may ignite in a post-process, and should be removed as a foreign matter.
　図３に示すように、菓子袋（アルミ蒸着又はアルミ箔あり）１５は、厚さがないが金属なので透過光量がやや少なく影があるが、異物除去部４は取り除くべき異物ではないとして通過させる処理を行う。つまりアルミ蒸着又はアルミ箔は、粉砕機を損傷しないとの基準で異物ではないと判定する。そのため、菓子袋１５は後段の再利用の搬送路１に投入される。菓子袋１５は、後の再利用工程で粉砕され、溶剤で溶かされ、アルミニウムが分離され、プラスチックが回収される。ラップシート１４や、プラスチックトレイ１７も後段の再利用の搬送路１に投入される。アルミニウム缶のプルタブなどは、菓子袋（アルミ蒸着又はアルミ箔あり）１５の影とは、濃度が異なるので、異物と判定する。 As shown in FIG. 3, the confectionery bag 15 (with vapor-deposited aluminum or aluminum foil) has no thickness, but since it is metal, the amount of transmitted light is a little low and there is a shadow. process. In other words, vapor-deposited aluminum or aluminum foil is judged not to be a foreign matter on the basis that it does not damage the grinder. Therefore, the confectionery bag 15 is thrown into the transport path 1 for reuse in the latter stage. The confectionery bag 15 is pulverized and dissolved in a solvent in a subsequent recycling process to separate the aluminum and recover the plastic. The wrap sheet 14 and the plastic tray 17 are also thrown into the transport path 1 for reuse in the latter stage. The pull tab of an aluminum can is determined to be a foreign object because the density is different from the shadow of the confectionery bag (aluminum deposition or aluminum foil) 15 .
　図４は、Ｘ線装置２の正面図である。Ｘ線装置２は箱体２３からなる。Ｘ線装置２は、既設の搬送路（ベルトコンベア）１に差し込み可能に構成される。箱体２３の正面には、タッチディスプレィ２４と操作パネル２５が設けられ、屋根部には装置の異常状態を知らせるパトランプ２６とブザー（図示は省略）が設けられる。底部には、箱体２の移動を容易にするキャスター２７と、キャスター２７を浮かすレベルフット２８が設けられる。搬送路（ベルトコンベア）１の左端には、図示していないが異物除去部４と異物回収箱１１があるとする。 4 is a front view of the X-ray device 2. FIG. The X-ray device 2 consists of a box 23 . The X-ray device 2 is configured to be insertable into an existing transport path (belt conveyor) 1 . A touch display 24 and an operation panel 25 are provided on the front of the box 23, and a patrol lamp 26 and a buzzer (not shown) are provided on the roof to inform an abnormal state of the device. Casters 27 for facilitating movement of the box 2 and level feet 28 for floating the casters 27 are provided at the bottom. At the left end of the conveying path (belt conveyor) 1, there are a foreign matter removal section 4 and a foreign matter recovery box 11 (not shown).
　図５は、Ｘ線装置２の右側面図である。図５は、後方を覆う背面カバーと、左右側面を覆う保護カバーを開けた状態で示す。この状態では、箱体２３の開口部２９が開口する。内部のラインセンサー９は、開口部２９の中央付近に位置する。ラインセンサー９は、シングルのラインセンサーで示す。これによれば、箱体２３を後方に移動しＸ線装置２を搬送路（ベルトコンベア）１に差し込む又は入れ込むことができる。差し込んだ状態での既設の搬送路（ベルトコンベア）１を図４の一点鎖線で示す。図５に示すように、Ｘ線源５は、箱体２３の上部にあって、下方に向かった照射される。搬送路（ベルトコンベア）１の幅をカバーするように照射される。箱体２３の下部に設置された画像処理ＰＣ３０で、Ｘ線撮像画像の解析を行う。画像処理ＰＣ３０は、図１の異物検出部３に相当する。 FIG. 5 is a right side view of the X-ray device 2. FIG. FIG. 5 shows a state in which the back cover covering the rear and the protective covers covering the left and right sides are opened. In this state, the opening 29 of the box 23 is open. The internal line sensor 9 is positioned near the center of the opening 29 . Line sensor 9 is shown as a single line sensor. According to this, the box 23 can be moved rearward and the X-ray apparatus 2 can be inserted or inserted into the conveying path (belt conveyor) 1 . The existing conveying path (belt conveyor) 1 in the inserted state is indicated by the one-dot chain line in FIG. As shown in FIG. 5, the X-ray source 5 is located above the box 23 and radiates downward. The light is irradiated so as to cover the width of the conveying path (belt conveyor) 1 . An image processing PC 30 installed at the bottom of the box 23 analyzes the X-ray captured image. The image processing PC 30 corresponds to the foreign object detector 3 in FIG.
　図６は、実施例１でＸ線装置２を既設の搬送路（ベルトコンベア）１に差し込んだ状態の正面図である。搬送路（ベルトコンベア）１は箱体２３の中にあるが見えるものとして示す。図６は、ラインセンサー９が既設の搬送路（ベルトコンベア）１の上ベルト１ａと下ベルト１ｂの間に差し込まれる例である。箱体２３の下部に設置された画像処理ＰＣ３０で、Ｘ線撮像画像の解析を行う。 FIG. 6 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the first embodiment. The transport path (conveyor belt) 1 is shown inside the box 23 but visible. FIG. 6 shows an example in which the line sensor 9 is inserted between the upper belt 1a and the lower belt 1b of the existing conveying path (belt conveyor) 1. FIG. An image processing PC 30 installed at the bottom of the box 23 analyzes the X-ray captured image.
　図７は、実施例２でＸ線装置２を既設の搬送路（ベルトコンベア）１に差し込んだ状態の正面図である。搬送路（ベルトコンベア）１は箱体２３の中にあるが見えるものとして示す。図７は、ラインセンサー９が、迂回ローラ３１で拡げられた搬送路（ベルトコンベア）１のスペースに差し込まれる。迂回ローラ３１で下ベルト１ｂを押し下げて上ベルト１ａとの間の空間を拡張したので、箱体２３を移動してのラインセンサー９の搬送路（ベルトコンベア）１への差し込みが容易にできる。 FIG. 7 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the second embodiment. The transport path (conveyor belt) 1 is shown inside the box 23 but visible. In FIG. 7, the line sensor 9 is inserted into the space of the conveying path (belt conveyor) 1 widened by the detour rollers 31 . Since the detour roller 31 pushes down the lower belt 1b to expand the space between it and the upper belt 1a, the line sensor 9 can be easily inserted into the conveying path (belt conveyor) 1 by moving the box 23. - 特許庁
　図８は、実施例３でＸ線装置２を既設の搬送路（ベルトコンベア）１に差し込んだ状態の正面図である。迂回ローラ３１で上ベルト１ａを押し上げて下ベルト１ｂとの間の空間を拡張したので、箱体２３を移動してのラインセンサー９の搬送路（ベルトコンベア）１への差し込みが容易にできる。すなわちＸ線装置２の搬送路（ベルトコンベア）１への差し込みが容易にできる。 FIG. 8 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the third embodiment. Since the detour roller 31 pushes up the upper belt 1a to expand the space between it and the lower belt 1b, the line sensor 9 can be easily inserted into the conveying path (belt conveyor) 1 by moving the box 23. - 特許庁That is, the X-ray device 2 can be easily inserted into the conveying path (belt conveyor) 1 .
　図９は、実施例４でＸ線装置２を既設の搬送路（ベルトコンベア）１に差し込んだ状態の正面図である。ラインセンサー９は、搬送路（ベルトコンベア）１の上ベルト１ａの上側に位置させ、かつラインセンサー９の上側に乗り移りプレート３２を配置した。すなわちラインセンサー９は、乗り移りプレート３２の内側に配置される。乗り移りプレート３２に載った廃プラスチック６は搬送されないので、送風機３３を設けて吹き飛ばして進行させる。送風機３３で進行が困難な重い金属片などはセンサーで検知してパトランプ２６を点灯させ、ブザーを鳴動させる。 FIG. 9 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the fourth embodiment. The line sensor 9 is positioned above the upper belt 1a of the conveying path (belt conveyor) 1, and the transfer plate 32 is arranged above the line sensor 9. That is, the line sensor 9 is arranged inside the transfer plate 32 . Since the waste plastic 6 placed on the transfer plate 32 is not conveyed, an air blower 33 is provided to blow it forward. A heavy metal piece or the like that is difficult to move forward with the blower 33 is detected by a sensor, a patrol lamp 26 is turned on, and a buzzer is sounded.
　図１０は、実施例５でＸ線装置２を既設の搬送路（ベルトコンベア）１に差し込んだ状態の正面図である。ラインセンサー９は、搬送路（ベルトコンベア）１の上ベルト１ａの上側に位置させ、上ベルト１ａは迂回ローラ３１で上ベルト１ａを押し下げた。ラインセンサー９の上側には略水平な乗り移りプレート３２を配置した。乗り移りプレート３２に載った廃プラスチック６は搬送されないので、送風機３３を設けて吹き飛ばして進行させる。送風機３３で進行が困難な重い金属片などは、センサーで検知してパトランプ２６を点灯させ、ブザーを鳴動させる。 FIG. 10 is a front view of the state in which the X-ray device 2 is inserted into the existing transport path (belt conveyor) 1 in the fifth embodiment. The line sensor 9 was positioned above the upper belt 1a of the conveying path (belt conveyor) 1, and the upper belt 1a pushed down the upper belt 1a with the detour roller 31. A substantially horizontal transfer plate 32 is arranged above the line sensor 9. - 特許庁Since the waste plastic 6 placed on the transfer plate 32 is not conveyed, an air blower 33 is provided to blow it forward. A heavy metal piece or the like that is difficult to move with the blower 33 is detected by a sensor, the patrol lamp 26 is turned on, and a buzzer is sounded.
　図１１は、ラインセンサー９の高さ調節部材４０、及び迂回ローラ３１の高さ調節部材４１の説明図である。高さ調節部材４０と高さ調節部材４１は、いずれもＬ字形支柱にスリット３５を設け、ラインセンサー９及び迂回ローラ３１の一端もしくは両端を上下移動可能にスリット３５に通し、高さ調整ネジ３４で固定したものである。迂回ローラ３１は、回転可能であることが好ましい。このような構成に限らず、ボールねじを用いて、正確な高さ調整ができるようにしてもよい。 11A and 11B are explanatory diagrams of the height adjusting member 40 of the line sensor 9 and the height adjusting member 41 of the detour roller 31. FIG. Both the height adjusting member 40 and the height adjusting member 41 are provided with a slit 35 in the L-shaped support, one end or both ends of the line sensor 9 and the detour roller 31 are vertically movably passed through the slit 35, and the height adjusting screw 34 is It is fixed with The detour roller 31 is preferably rotatable. It is not limited to such a configuration, and a ball screw may be used to enable accurate height adjustment.
　図１２は、コンベア渡りする箇所にＸ線装置２を設けた例である。Ｘ線装置２を第１搬送路と第２搬送路のコンベア渡りする箇所に設置することができる。搬送路の水平な箇所にＸ線装置２を設置する場合に比較して、高さ方向のスペースが少ないので、床には段差が必要となる。異物を検出してから振り分け板を動かすまでには時間を要するので、この時間に見合った高さが必要である。Ｘ線装置２は、横向きで設置される。 FIG. 12 is an example in which the X-ray device 2 is provided at a location where the conveyor crosses. The X-ray device 2 can be installed at a location where the first conveying path and the second conveying path cross over the conveyors. Since the space in the height direction is smaller than when the X-ray apparatus 2 is installed at a horizontal portion of the transport path, a step is required on the floor. Since it takes time to move the sorting plate after the detection of the foreign object, the height must be suitable for this time. The X-ray device 2 is installed horizontally.
　図１３～図３１は、本発明の廃プラスチックの異物除去装置に用いるためのＸ線装置２００の各例を示す。 13 to 31 show examples of an X-ray device 200 for use in the apparatus for removing foreign matter from waste plastics of the present invention.
　図１３～図１８は、第１例のＸ線装置２００であり、Ｘ線発生器２０２を含む箱体２１２と、架台２１３からなる。架台２１３は、箱体２１２の下部にあって、正面板２１３ａと背面板２１３ｂを備え、下部は画像処理ＰＣ２３０が収納される収納箱２２３となっている。架台２１３の底面には移動を容易にするキャスター２２７とキャスター２２７を浮かして架台２１３を床に固定するレベルフット２２８を備える。図１３では、架台２１３の背面側を覆う背面板２１３ｂと、カバー部材２０９としての右側面を覆う右側面カバー２０９ａと、左側面を覆う左側面カバー２０９ｂを開いた状態で示す。この状態では、架台２１３の開口部２０４が形成され開口する。開口部２０４は、上流側側面２０４ａと、下流側側面２０４ｂと、ベルトコンベア１（既設の搬送路１）の搬送方向と直交する正面側の側面２０４ｃとによって開口されることで形成される。右側面カバー２０９ａと左側面カバー２０９ｂの凹部には、Ｘ線を遮るカーテン（図示せず）が設けられ、全体としてＸ線が外部に漏れ出ないようにしている。Ｘ線発生器２０２のＸ線源２０５は、フィラメント（陰極）とターゲット（陽極）からなりＸ線が発生される。Ｘ線により、ベルトコンベア上の検査対象物に混入した鉄やステンレスの金属類、石、ガラスなどの異物を検知する。 13 to 18 show the X-ray apparatus 200 of the first example, which consists of a box 212 including an X-ray generator 202 and a frame 213. FIG. The mount 213 is located in the lower part of the box 212 and has a front plate 213a and a rear plate 213b. The bottom surface of the pedestal 213 is provided with casters 227 for facilitating movement and level feet 228 for floating the casters 227 and fixing the pedestal 213 to the floor. In FIG. 13, the back plate 213b covering the back side of the mount 213, the right side cover 209a covering the right side as the cover member 209, and the left side cover 209b covering the left side are shown in an open state. In this state, the opening 204 of the mount 213 is formed and opened. The opening 204 is formed by an upstream side surface 204a, a downstream side surface 204b, and a front side surface 204c orthogonal to the conveying direction of the belt conveyor 1 (existing conveying path 1). Curtains (not shown) that block X-rays are provided in the recesses of the right side cover 209a and the left side cover 209b to prevent the X-rays from leaking outside. The X-ray source 205 of the X-ray generator 202 is composed of a filament (cathode) and a target (anode) and generates X-rays. X-rays are used to detect foreign substances such as iron and stainless metals, stones, and glass mixed in the inspection objects on the belt conveyor.
　図１４は、Ｘ線装置２００の正面図である。箱体２１２の正面には、タッチディスプレィ２２４と操作パネル２２５が設けられ、屋根には装置の異常状態を知らせるパトランプ２２６とブザー（図示省略）が設けられる。カバー部材２０９を構成する右側面カバー２０９ａと左側面カバー２０９ｂは、一点鎖線で示すようにヒンジ２１０（図１５参照）で開閉できる。背面板２１３ｂもヒンジで開閉できる。 14 is a front view of the X-ray device 200. FIG. A touch display 224 and an operation panel 225 are provided on the front of the box body 212, and a patrol lamp 226 and a buzzer (not shown) are provided on the roof to inform an abnormal state of the apparatus. A right side cover 209a and a left side cover 209b, which constitute the cover member 209, can be opened and closed by hinges 210 (see FIG. 15), as indicated by dashed lines. The rear plate 213b can also be opened and closed with a hinge.
　図１５は、Ｘ線装置２００を既設ベルトコンベア１に差し込む際の右側面図である。この状態では、右側面カバー２０９ａと、左側面カバー２０９ｂと、背面板２１３ｂとを開いて開口部２０４を形成する。Ｘ線検出器２０３はラインセンサーからなり、検査対象物を撮像するカメラであり、着脱可能に架台２１３に設けられるので、外してある。これによれば、Ｘ線装置２００をスライドして既設ベルトコンベア１に前後方向から、つまり既設ベルトコンベア１の搬送方向と直交する方向から差し込む。開口部２０４に既設ベルトコンベア１が差し込まれるものとなる。 15 is a right side view when inserting the X-ray device 200 into the existing belt conveyor 1. FIG. In this state, the right side cover 209a, the left side cover 209b, and the back plate 213b are opened to form the opening 204. As shown in FIG. The X-ray detector 203 is composed of a line sensor, is a camera for imaging an object to be inspected, and is detachably provided on a pedestal 213, so it is removed. According to this, the X-ray device 200 is slid and inserted into the existing belt conveyor 1 from the front and back direction, that is, from the direction perpendicular to the conveying direction of the existing belt conveyor 1 . The existing belt conveyor 1 is inserted into the opening 204 .
　図１６は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ後、Ｘ線検出器２０３を装着した状態の右側面図である。取り外しておいたＸ線検出器２０３が、架台２１３の正面板２１３ａと背面板２１３ｂを架け渡すように装着される。Ｘ線検出器２０３は、既設ベルトコンベア１の上ベルト１ａと下ベルト１ｂの間に設置される。 FIG. 16 is a right side view of a state in which the X-ray detector 203 is mounted after the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. The removed X-ray detector 203 is attached so as to bridge the front plate 213a and the rear plate 213b of the gantry 213 . The X-ray detector 203 is installed between the upper belt 1 a and the lower belt 1 b of the existing belt conveyor 1 .
　図１７は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ後、カバー部材２０９である右側面カバー２０９ａを閉じた状態の右側面図である。Ｘ線検出器２０３は、既設ベルトコンベア１の上ベルト１ａと下ベルト１ｂの間に設置される。 FIG. 17 is a right side view of a state in which the right side cover 209a, which is the cover member 209, is closed after the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. The X-ray detector 203 is installed between the upper belt 1 a and the lower belt 1 b of the existing belt conveyor 1 .
　図１８は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ状態を示す斜視図である。右側面カバー２０９ａと左側面カバー２０９ｂと背面板２１３ｂは閉じた状態にある。例として、上ベルト１ａに載った検査対象物が図面左方向に搬送され、Ｘ線発生器２０２でチェックされる。下ベルト１ｂは、図面右方向に戻る。既設ベルトコンベア１は、行きの上ベルト１ａと戻りの下ベルト１ｂからなり、上流がＸ線装置２００の右側で、下流がＸ線装置２００の左側となる。右側面カバー２０９ａと左側面カバー２０９ｂの入口と出口部分２３２には、Ｘ線が漏れ出ないようにカーテン２３１が設けられる。 18 is a perspective view showing a state in which the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. The right side cover 209a, the left side cover 209b and the back plate 213b are closed. As an example, an object to be inspected placed on the upper belt 1 a is conveyed leftward in the drawing and checked by the X-ray generator 202 . The lower belt 1b returns to the right in the drawing. The existing belt conveyor 1 consists of an upper forward belt 1a and a lower return belt 1b. Curtains 231 are provided at the entrance and exit portions 232 of the right side cover 209a and the left side cover 209b to prevent leakage of X-rays.
　図１９は、図１８のＡ－Ａ線断面図である。Ｘ線源２０５は、Ｘ線発生器２０２の内部にあって、箱体２１２の内部を通過して下方に向かって照射される。既設ベルトコンベア１の幅をカバーするように照射される。Ｘ線検出器２０３で検査対象物を撮像する。撮像データは、架台２１３の収納箱２２３内に設置された画像処理ＰＣ２３０に送られ、Ｘ線撮像画像が解析される。例として、金属や石などの異物が検出された場合、パトランプ２２６を点灯させ、ブザーを鳴動させる。既設ベルトコンベア１の走行を停止させるため異物検出信号を設け、既設ベルトコンベア１の制御部に送ることができる。これによれば、既設ベルトコンベア１を直ちに停止できる。図示例では、画像処理ＰＣ２３０を架台２１３の下部に設置したが、箱体２１２に設置してもよい。その場合、架台２１３の下部が広く空くので、開口部２０４の間口（高さ）をより広くできる。これによりトラフ型コンベアなど、既設ベルトコンベア１の上ベルト１ａと下ベルト１ｂの間隔が大きい場合に有利になる。 FIG. 19 is a cross-sectional view taken along line AA of FIG. The X-ray source 205 is inside the X-ray generator 202 and irradiates downward through the inside of the box 212 . It is irradiated so as to cover the width of the existing belt conveyor 1 . The X-ray detector 203 picks up an image of the object to be inspected. The imaging data is sent to the image processing PC 230 installed in the storage box 223 of the gantry 213, and the X-ray imaging image is analyzed. As an example, when a foreign object such as metal or stone is detected, the patrol lamp 226 is turned on and a buzzer is sounded. A foreign object detection signal can be provided to stop the running of the existing belt conveyor 1 and sent to the control section of the existing belt conveyor 1 . According to this, the existing belt conveyor 1 can be immediately stopped. In the illustrated example, the image processing PC 230 is installed under the pedestal 213 , but it may be installed on the box 212 . In that case, since the lower portion of the mount 213 is wide, the frontage (height) of the opening 204 can be made wider. This is advantageous when the gap between the upper belt 1a and the lower belt 1b of the existing belt conveyor 1 is large, such as a trough type conveyor.
　図２０は、迂回ローラの配置を示す図１８のＡ－Ａ線断面図である。迂回ローラ２０７は架台２１３の正面板２１３ａと背面板２１３ｂに着脱可能に設けられる。上ベルト１ａと下ベルト１ｂの間が迂回ローラ２０７で拡げられた状態になっており、上ベルト１ａと下ベルト１ｂの間にＸ線検出器２０３が設置される。迂回ローラ２０７で下ベルト１ｂを押し下げて上ベルト１ａとの間の空間を拡張したので、箱体２１２を移動してのＸ線検出器２０３の設置が容易になる。 FIG. 20 is a cross-sectional view taken along line AA of FIG. 18, showing the arrangement of bypass rollers. The detour roller 207 is detachably provided on the front plate 213 a and the rear plate 213 b of the base 213 . The space between the upper belt 1a and the lower belt 1b is widened by a bypass roller 207, and an X-ray detector 203 is installed between the upper belt 1a and the lower belt 1b. Since the detour roller 207 pushes down the lower belt 1b to expand the space between it and the upper belt 1a, it becomes easy to install the X-ray detector 203 by moving the box 212. FIG.
　図２１は、迂回ローラ２０７の別の形態を示す断面図である。迂回ローラ２０７で上ベルト１ａを押し上げ、下ベルト１ｂとの間の空間を拡張したので、Ｘ線検出器２０３の設置が容易になる。 FIG. 21 is a cross-sectional view showing another form of the detour roller 207. FIG. Since the detour roller 207 pushes up the upper belt 1a and expands the space between it and the lower belt 1b, installation of the X-ray detector 203 is facilitated.
　図２２は、Ｘ線検出器２０３の高さ調整部材２４０と、迂回ローラ２０７の高さ調整部材２４１を示す図である。これらの高さ調節部材２４０、２４１は、Ｌ字形支柱にスリット２１１を設け、Ｘ線検出器２０３及び迂回ローラ２０７の一端を上下移動可能にスリット２１１に通し、高さ調整ネジ２０８で固定したものである。迂回ローラ２０７は回転可能に支持される。 FIG. 22 is a diagram showing the height adjustment member 240 of the X-ray detector 203 and the height adjustment member 241 of the detour roller 207. FIG. These height adjusting members 240 and 241 are formed by providing a slit 211 in an L-shaped support, passing one end of the X-ray detector 203 and bypass roller 207 through the slit 211 so as to be vertically movable, and fixing them with a height adjusting screw 208. is. The detour roller 207 is rotatably supported.
　図２３は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ状態の右側面図である。既設ベルトコンベア１は、トラフベルトを用いている。検査対象物２１５がベルトからこぼれないように、上ベルト１ａがベルト傾斜用ローラ２１６で湾曲形状にされ、コンベアの搬送方向の両側部には、コンベア側壁２１４、２１４が設けられることにより既設ベルトコンベア１が形成されている。Ｘ線源２０５から照射されたＸ線は、Ｘ線照射領域２１８のように下方に広がって照射され、Ｘ線検知器２０３で、検査対象物２１５が撮像される。 FIG. 23 is a right side view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. The existing belt conveyor 1 uses a trough belt. The upper belt 1a is curved by a belt inclining roller 216 so that the inspection object 215 does not fall off the belt, and conveyor side walls 214, 214 are provided on both sides in the conveying direction of the conveyor. 1 is formed. X-rays emitted from the X-ray source 205 spread downward like an X-ray irradiation area 218 , and the X-ray detector 203 picks up an image of the inspection object 215 .
　図２４は、Ｘ線装置２００を既設ベルトコンベア１に組み込む前の右側面図である。Ｘ線装置２００は、Ｘ線発生器２０２を含む箱体２１２と、架台２１３からなる。架台２１３は、箱体２１２の下部にあって、正面板２１３ａと背面板２１３ｂを備える。左右の側面は既設ベルトコンベア１を通すため大きく開口している。すなわち、架台２１３の開口部は既設ベルトコンベア１の上流側及び下流側の二側面（左右の側面）に位置するように形成されている。図１３の実施例とは異なり、画像処理ＰＣ２３０は、箱体２１２に収納される。架台２１３の底面にはキャスター２２７とレベルフット２２８を備える。架台２１３には、正面板２１３ａと背面板２１３ｂがあり、背面板２１３ｂは開閉されることはなく閉じて固定される。Ｘ線検知器２０３は、着脱可能に架台２１３の正面板２１３ａと、背面板２１３ｂに掛け渡される。 24 is a right side view of the X-ray device 200 before being incorporated into the existing belt conveyor 1. FIG. The X-ray device 200 comprises a box 212 containing an X-ray generator 202 and a frame 213 . The pedestal 213 is located below the box 212 and has a front plate 213a and a rear plate 213b. The left and right sides are wide open for the existing belt conveyor 1 to pass through. That is, the openings of the pedestal 213 are formed so as to be positioned on two side surfaces (left and right side surfaces) of the existing belt conveyor 1, namely, upstream and downstream. Unlike the embodiment of FIG. 13, image processing PC 230 is housed in box 212 . Casters 227 and level feet 228 are provided on the bottom surface of the mount 213 . The mount 213 has a front plate 213a and a rear plate 213b, and the rear plate 213b is closed and fixed without being opened and closed. The X-ray detector 203 is detachably spanned between the front plate 213a and the rear plate 213b of the gantry 213 .
　図２４では、Ｘ線検知器２０３は取り外した状態で示す。Ｘ線検知器２０３は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ後に架台２１３に取り付ける。Ｘ線装置２００は、左右の両側面が大きく開口しているので、既設ベルトコンベア１の搬送方向の一端部からスライドして組み込む。 In FIG. 24, the X-ray detector 203 is shown removed. The X-ray detector 203 is attached to the frame 213 after the X-ray device 200 is incorporated into the existing belt conveyor 1 . Since the X-ray device 200 has large openings on both left and right sides, it is slid from one end of the existing belt conveyor 1 in the conveying direction.
　図２５は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ状態の平面図である。架台２１３の上部の正面板２１３ａと、上部の背面板２１３ｂを開いた状態で示す。カバー部材２０９の右側面カバー２０９ａと左側面カバー２０９ｂが長いので、これを支持するため架台２１３の前後両側には長梁を設けている。 FIG. 25 is a plan view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. An upper front plate 213a and an upper rear plate 213b of the pedestal 213 are shown in an open state. Since the right side cover 209a and the left side cover 209b of the cover member 209 are long, long beams are provided on both front and rear sides of the base 213 to support them.
　図２６は、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ状態の正面図である。Ｘ線装置２００の左右側には、右側面カバー２０９ａと左側面カバー２０９ｂが設けられ、Ｘ線が開口部から漏れ出ないように覆う。右側面カバー２０９ａと左側面カバー２０９ｂの入口と出口部分２３２には、Ｘ線を遮断するカーテン２３１（図１８参照）が設けられる。架台２１３の底部には、図２３に示すように底板２２２が設けられ、下ベルト１ｂの下方を覆ってＸ線を遮断する。 FIG. 26 is a front view of the state in which the X-ray device 200 is incorporated into the existing belt conveyor 1. FIG. A right side cover 209a and a left side cover 209b are provided on the left and right sides of the X-ray apparatus 200 to cover X-rays so that they do not leak out from the opening. A curtain 231 (see FIG. 18) for blocking X-rays is provided at the entrance and exit portions 232 of the right side cover 209a and the left side cover 209b. As shown in FIG. 23, a bottom plate 222 is provided at the bottom of the pedestal 213 to cover the bottom of the lower belt 1b and block X-rays.
　図２７は、干渉部材２２１を設けたＸ線装置２００の右側面図である。検査対象物がリサイクルされる家庭電気商品の粉砕されたプラスチックの場合、検査対象物２１５の量が多くなる。このように既設ベルトコンベア１の上の検査対象物２１５の量が多い場合、コンベア側壁２１４とＸ線照射領域２１８の外側の領域に検査対象物２１５が入る。その場合、Ｘ線検知器２０３では撮像されないので、金属などの検知ができない。そこで、例えば、ハの字形状に設置される干渉部材２２１、２２１を架台２１３に設け、上ベルト１ａの両側に吊り下げるように設けた。干渉部材２２１、２２１は、正面図でＸ線源２０５の真下よりも既設ベルトコンベア１の運搬方向における、Ｘ線源２０５の上流側に位置するように設ける。干渉部材２２１、２２１は、検査対象物２１５に干渉して荷崩れさせ、検査対象物２１５を上ベルト１ａの中央側に寄せ、Ｘ線照射領域２１８に入るように作用する。 27 is a right side view of the X-ray device 200 provided with the interference member 221. FIG. If the object to be inspected is crushed plastic from recycled home appliances, the amount of object 215 to be inspected will be large. When the amount of inspection objects 215 on the existing belt conveyor 1 is large as described above, the inspection objects 215 enter the area outside the conveyor side wall 214 and the X-ray irradiation area 218 . In that case, since the X-ray detector 203 does not pick up an image, it is impossible to detect metal or the like. Therefore, for example, the interference members 221, 221 installed in a V-shape are provided on the frame 213 so as to be suspended from both sides of the upper belt 1a. The interference members 221, 221 are provided so as to be located upstream of the X-ray source 205 in the conveying direction of the existing belt conveyor 1 from directly below the X-ray source 205 in the front view. The interfering members 221 , 221 interfere with the object 215 to be inspected to cause it to collapse, move the object 215 toward the center of the upper belt 1 a and enter the X-ray irradiation area 218 .
　干渉部材２２１、２２１は、表面が凹凸状となったロールを用いている。ロールの凹凸としては表面が粗面となっていれば良く、複数の針を突出させた構造、表面をザラザラ状とした構造等、適宜、変更することができる。ロールの表面を凹凸状とすることにより検査対象物２１５を荷崩れさせることができる。ロールは、モータ２２９によって回転させても良く、検査対象物２１５の運搬移動力によって追随回転するようにしても良い。 The interference members 221, 221 use rolls with uneven surfaces. As for the unevenness of the roll, it is sufficient if the surface is rough, and the structure can be appropriately changed to a structure in which a plurality of needles protrude, a structure in which the surface is rough, or the like. By making the surface of the roll uneven, the inspection object 215 can be collapsed. The roll may be rotated by the motor 229, and may be rotated following the transport force of the inspection object 215. FIG.
　図２８は、他の干渉部材２２１を示すためのＸ線装置２００の右側面図である。干渉部材２２１は、ロール型の干渉部材に限らず、図２８のような干渉面を有する曲面にしてもよい。干渉面を有する曲面がハの字形状に設置され、上ベルト１ａの中央に対向する面が下方に拡がるように傾斜しているので、Ｘ線源２０５の真下に設置してもよい。これによって、検査対象物２１５に干渉して荷崩れさせ、検査対象物２１５を上ベルト１ａの中央側に寄せることができる。 FIG. 28 is a right side view of the X-ray device 200 showing another interference member 221. FIG. The interference member 221 is not limited to a roll type interference member, and may be a curved surface having an interference surface as shown in FIG. A curved surface having an interference surface is installed in a V-shape, and the surface facing the center of the upper belt 1a is inclined so as to expand downward, so that it may be installed directly below the X-ray source 205 . As a result, the inspection object 215 can be interfered with and collapsed, and the inspection object 215 can be moved toward the center of the upper belt 1a.
　図２９は、別例であり、Ｘ線装置２００を既設ベルトコンベア１に組み込んだ状態の右側面図である。既設ベルトコンベア１は、平ベルトが用いられる。検査対象物２１５がベルトからこぼれないように、既設ベルトコンベア１の搬送方向の両側部には、コンベア側壁２１４、２１４が設けられる。既設ベルトコンベア１の上の検査対象物２１５の量が多い場合、コンベア側壁２１４とＸ線照射領域２１８の外側領域に検査対象物２１５が入るとＸ線検知器２０３では撮像されず金属などが検知できない。そこで、Ｘ線源の上流側に位置する干渉部材２２１、２２１を架台２１３に設け、例えば、ハの字形状に設置し、検査対象物２１５に干渉して荷崩れさせ、上ベルト１ａの中央側に寄せ、Ｘ線照射領域に入るようにした。干渉部材２２１、２２１は、ロールと干渉面を有する曲面のいずれか一方を設置するか、又は両方を設置してもよい。ロールには、モータを付けて回転させ、詰まりを防止してもよい。 FIG. 29 is another example, and is a right side view of a state in which the X-ray device 200 is incorporated in the existing belt conveyor 1. FIG. A flat belt is used for the existing belt conveyor 1 . Conveyor side walls 214, 214 are provided on both sides of the existing belt conveyor 1 in the conveying direction so that the inspection object 215 does not fall off the belt. When there is a large amount of inspection objects 215 on the existing belt conveyor 1, if the inspection objects 215 enter the outer area of the conveyor side wall 214 and the X-ray irradiation area 218, the X-ray detector 203 does not pick up an image, and the metal or the like is detected. Can not. Therefore, the interference members 221, 221 located upstream of the X-ray source are provided on the gantry 213, and are installed, for example, in a V-shape to interfere with the inspection object 215 to cause the load to collapse, and the center side of the upper belt 1a. so as to enter the X-ray irradiation area. As the interference members 221, 221, either one of a roll and a curved surface having an interference surface may be installed, or both may be installed. The rolls may be motorized to rotate and prevent jamming.
　図３０は、さらに別の例を示す。この例の既設ベルトコンベア１は上ベルト１ａ及び下ベルト１ｂが、例えばヒンジ連結の金属ベルトとなっており、上ベルト１ａ及び下ベルト１ｂの両サイドにはコンベア側壁２１４が立設されて形成されている。この金属ベルトはＸ線が透過しづらい。また、コンベア側壁２１４は、Ｘ線が透過できる材質からなるＸ線が透過できない材質の場合は、コンベア側壁２１４がＸ線を透過できるように部分的に変更される。ヒンジ連結の金属ベルトからなるベルトコンベアは、Ｘ線を透過しづらいので、Ｘ線検知器２０３を上ベルト１ａと下ベルト１ｂの間に設置したのでは撮像ができない。そこで、Ｘ線検知器２０３を上ベルト１ａの上方位置で、検査対象物の方向に傾いた斜めとなるように配置した。これによりＸ線照射領域２１８に検査対象物２１５の全体が入るので、検査対象物２１５の全体が撮像可能となる。この例では、金属ベルトに限らず、Ｘ線撮像が困難な樹脂製ベルトにも適用できる。 FIG. 30 shows yet another example. In the existing belt conveyor 1 of this example, the upper belt 1a and the lower belt 1b are, for example, hinge-connected metal belts, and conveyor side walls 214 are erected on both sides of the upper belt 1a and the lower belt 1b. ing. It is difficult for X-rays to pass through this metal belt. In addition, when the conveyor side wall 214 is made of a material through which X-rays can be transmitted but is not through which X-rays can be transmitted, the conveyor side wall 214 is partially changed so as to be able to transmit X-rays. A belt conveyor consisting of a hinge-connected metal belt is difficult for X-rays to pass through, so if the X-ray detector 203 is installed between the upper belt 1a and the lower belt 1b, imaging cannot be performed. Therefore, the X-ray detector 203 is arranged at a position above the upper belt 1a so as to be inclined toward the inspection object. As a result, the entire inspection object 215 enters the X-ray irradiation area 218, so that the entire inspection object 215 can be imaged. This example can be applied not only to metal belts but also to resin belts for which X-ray imaging is difficult.
　図３１は、Ｘ線装置２００を既設ベルトコンベア１に組み込む前の右側面図である。
Ｘ線装置２００は、架台２１３にキャスター２２７とレベルフット２２８を備え、左右の両側面が大きく開口しているので、既設ベルトコンベア１の長手方向の一端部からスライドして組み込むことができる。Ｘ線検知器２０３は着脱可能であるが、架台２１３に取り付けたままで既設ベルトコンベア１に組み込める。カバー部材２０９は図示を省略するが、図２６と同様に、架台２１３の両側に右側面カバー２０９ａと左側面カバー２０９ｂが設けられる。 31 is a right side view of the X-ray device 200 before being incorporated into the existing belt conveyor 1. FIG.
The X-ray apparatus 200 has casters 227 and level feet 228 on the gantry 213 and has large openings on both left and right sides, so that it can be incorporated by sliding from one end in the longitudinal direction of the existing belt conveyor 1 . Although the X-ray detector 203 is detachable, it can be incorporated into the existing belt conveyor 1 while attached to the pedestal 213 . Although illustration of the cover member 209 is omitted, a right side cover 209a and a left side cover 209b are provided on both sides of the pedestal 213 in the same manner as in FIG.
　本発明によれば、磁力選別機では除去が難しい廃プラスチックに混入した非磁性のステンレスの異物（例えばスプーン、ナイフ、釘など）を確実に除去でき、アルミ蒸着またはアルミ箔のプラスチック袋は除去せずに再利用工程に流すことができる廃プラスチックの異物除去装置として好適である。 According to the present invention, it is possible to reliably remove non-magnetic stainless foreign substances (for example, spoons, knives, nails, etc.) mixed in with waste plastics that are difficult to remove with a magnetic sorter, and it is possible to remove plastic bags made of aluminum vapor deposition or aluminum foil. It is suitable as a foreign matter removing apparatus for waste plastics that can be sent to the recycling process without any waste plastics.
　１　　搬送路（ベルトコンベア）
　２　　Ｘ線装置
　３　　異物検出部
　４　　異物除去部（振分け板）
　５　　Ｘ線源
　６　　廃プラスチック（対象物）
　７　　フィラメント（陰極）
　８　　ターゲット（陽極）
　９　　ラインセンサー
　９ａ　　デュアルセンサー
　１０　　磁性体異物除去手段
　１１　　異物回収箱
　１２　　ステンレスの異物
　１３　　弱磁性体の異物
　１４　　ラップシート
　１５　　菓子袋（アルミ蒸着又はアルミ箔あり）
　１５ａ　　アルミ蒸着又はアルミ箔
　１６　　菓子袋（アルミ蒸着又はアルミ箔なし）
　１７　　プラスチックトレイ
　２０　　搬送ベルト
　２１　　マグネットロール　
　２２　　鉄の異物（ボルト、ナットなど）
　２３　　箱体
　２４　　タッチディスプレィ
　２５　　操作パネル
　２６　　パトランプ
　２７　　キャスター
　２８　　レベルフット
　２９　　開口部
　３０　　画像処理ＰＣ
　３１　　迂回ローラ
　３２　　乗り移りプレート
　３３　　送風機
　３４　　高さ調整ネジ
　３５　　スリット
　４０　　ラインセンサー高さ調整部材
　４１　　迂回ローラ高さ調整部材
　１００　　廃プラスチックの異物除去装置
　ｍ1～ｍ５　　低エネルギーのＸ線の画像
　ｈ１～ｈ５　　高エネルギーのＸ線の画像
　２００　Ｘ線装置
　２０２　　Ｘ線発生器
　２０３　　Ｘ線検出器
　２０４　　開口部
　２０４ａ　　上流側側面
　２０４ｂ　　下流側側面
　２０４ｃ　　ベルトコンベアの搬送方向と直交する側面
　２０５　　Ｘ線源
　２０６　　Ｘ線コントローラ
　２０７　　迂回ローラ
　２０８　　高さ調整ネジ
　２０９　　カバー部材
　２０９ａ　　右側面カバー
　２０９ｂ　　左側面カバー
　２１０　　ヒンジ
　２１１　　スリット
　２１２　　箱体
　２１３　　架台
　２１３ａ　　正面板
　２１３ｂ0　　背面板
　２１３ｃ　　底板
　２１４　　コンベア側壁
　２１５　　検査対象物
　２１６　　ベルト傾斜用ローラ
　２１７　　トラフベルトの既設ベルトコンベア
　２１７ａ　　行き
　２１７ｂ　　戻り
　２１８　　Ｘ線照射領域
　２１９　　電源部
　２２０　　ファン
　２２１　　干渉部材
　２２２　　底板
　２２３　　収納箱
　２２４　　タッチディスプレィ
　２２５　　操作パネル
　２２６　　パトランプ
　２２７　　キャスター
　２２８　　レベルフット
　２２９　　モータ
　２３０　　画像処理ＰＣ
　２３１　　カーテン
　２３２　　入口と出口部分
　２４０　　Ｘ線検出器の高さ調整部材
　２４１　　迂回ローラの高さ調整部材
　
  1 Conveyor path (belt conveyor)
2 X-ray device 3 Foreign matter detector 4 Foreign matter remover (sorting plate)
5 X-ray source 6 Waste plastic (object)
7 filament (cathode)
8 target (anode)
9 Line sensor 9a Dual sensor 10 Magnetic foreign matter removing means 11 Foreign matter recovery box 12 Stainless foreign matter 13 Weakly magnetic foreign matter 14 Wrap sheet 15 Confectionery bag (aluminum vapor deposition or aluminum foil available)
15a aluminum vapor deposition or aluminum foil 16 candy bag (without aluminum vapor deposition or aluminum foil)
17 plastic tray 20 transport belt 21 magnet roll
22 Iron foreign matter (bolts, nuts, etc.)
23 box 24 touch display 25 operation panel 26 patrol lamp 27 caster 28 level foot 29 opening 30 image processing PC
31 Detour roller 32 Transfer plate 33 Blower 34 Height adjustment screw 35 Slit 40 Line sensor height adjustment member 41 Detour roller height adjustment member 100 Waste plastic foreign matter removal device m1 to m5 Low energy X-ray image h1 to h5 High Energy X-ray image 200 X-ray device 202 X-ray generator 203 X-ray detector 204 Opening 204a Upstream side 204b Downstream side 204c Side perpendicular to conveying direction of belt conveyor 205 X-ray source 206 X-ray controller 207 Bypass roller 208 Height adjustment screw 209 Cover member 209a Right side cover 209b Left side cover 210 Hinge 211 Slit 212 Box 213 Base 213a Front plate 213b0 Rear plate 213c Bottom plate 214 Conveyor side wall 215 Inspection object 216 Belt inclination roller 217 Trough belt existing belt conveyor 217a go 217b return 218 X-ray irradiation area 219 power supply unit 220 fan 221 interference member 222 bottom plate 223 storage box 224 touch display 225 operation panel 226 patrol lamp 227 caster 228 level foot 229 motor 230 image processing PC
231 Curtain 232 Entrance and Exit Portion 240 X-ray Detector Height Adjustment Member 241 Detour Roller Height Adjustment Member

Claims (7)

  1. 　アルミ蒸着またはアルミ箔コーティングされたプラスチック袋を含む廃プラスチックに混入した異物を前記廃プラスチックを再利用する前段階で除去する廃プラスチックの異物除去装置であって、
    　前記廃プラスチックを搬送する搬送路と、
    　前記搬送路上を搬送中の廃プラスチックにＸ線を照射するＸ線源と、照射されたＸ線を受けるラインセンサーとからなるＸ線装置と、
    　前記ラインセンサーの撮像データに基づいてステンレスの異物及び弱磁性体の異物を検出する異物検出部と、
    　前記異物検出部が検出したステンレスの異物及び弱磁性体の異物を前記搬送路から除く異物除去部と、を備えていることを特徴とする廃プラスチックの異物除去装置。     A waste plastic foreign matter removing apparatus for removing foreign matter mixed in waste plastic including a plastic bag coated with aluminum vapor deposition or aluminum foil before the waste plastic is reused,
    a transport path for transporting the waste plastic;
    an X-ray device comprising an X-ray source for irradiating X-rays onto the waste plastic being conveyed on the conveying path, and a line sensor for receiving the irradiated X-rays;
    a foreign matter detection unit that detects stainless foreign matter and weakly magnetic foreign matter based on the imaging data of the line sensor;
    a foreign matter removing unit for removing stainless foreign matter and weakly magnetic foreign matter detected by the foreign matter detecting unit from the conveying path.
  2. 　前記廃プラスチックが搬送ベルトで供給され、該搬送ベルトの一端にマグネットロールが設けられおり、前記マグネットロールの磁力によって磁性体の異物を除去する磁性体異物除去手段が、前記搬送路の上流側に配置されていることを特徴とする請求項１に記載の廃プラスチックの異物除去装置。 The waste plastic is supplied by a conveyor belt, and a magnet roll is provided at one end of the conveyor belt. 2. The apparatus for removing foreign matter from waste plastics according to claim 1, wherein the foreign matter removing apparatus is arranged.
  3. 　前記ラインセンサーは、高エネルギーのＸ線を受ける第１のラインセンサーと、低エネルギーのＸ線を受ける第２のラインセンサーからなるデュアルラインセンサーであることを特徴とする請求項１に記載の廃プラスチックの異物除去装置。 2. The waste according to claim 1, wherein said line sensor is a dual line sensor comprising a first line sensor for receiving high-energy X-rays and a second line sensor for receiving low-energy X-rays. Plastic foreign matter removal device.
  4. 　前記Ｘ線装置は、検査対象物にＸ線を照射するＸ線源を備えた箱体と、下端にキャスターを有し、既設の搬送路が差し込み可能な開口部が形成されて前記箱体を支持する架台と、を備え、
    　前記ラインセンサーは、前記架台の開口部に既設の搬送路が差し込まれた後に、前記Ｘ線源との対応位置となるように前記架台に着脱可能に掛け渡されることを特徴する請求項１に記載の廃プラスチックの異物除去装置。     The X-ray apparatus has a box body equipped with an X-ray source for irradiating an object to be inspected with X-rays, casters at the lower end, and an opening into which an existing transport path can be inserted. a supporting pedestal;
    2. The line sensor according to claim 1, wherein the line sensor is detachably spanned over the gantry so as to correspond to the X-ray source after an existing transport path is inserted into the opening of the gantry. Apparatus for removing foreign matter from waste plastic described above.
  5. 　前記開口部は、前記既設の搬送路の搬送方向の上流側及び下流側の二側面に位置するように前記架台に設けられ、前記架台の他の二側面には前記既設の搬送路上に設置されている廃プラスチックに干渉して荷崩れさせることにより前記廃プラスチックを前記Ｘ線源のＸ線照射領域に収める干渉部材が設けられていることを特徴とする請求項４に記載の廃プラスチックの異物除去装置。 The openings are provided on the pedestal so as to be positioned on two sides of the existing transport path, namely, upstream and downstream in the transport direction, and are provided on the existing transport path on the other two sides of the pedestal. 5. The foreign matter of waste plastics according to claim 4, further comprising an interference member for interfering with the waste plastics stored therein to cause the waste plastics to collapse so that the waste plastics are contained in the X-ray irradiation area of the X-ray source. removal device.
  6. 　前記干渉部材は、前記架台の他の二側面に斜め方向を向いて取り付けられた干渉ローラと、干渉ローラを回転させるモータとを備えていることを特徴とする請求項５に記載の廃プラスチックの異物除去装置。 6. The waste plastic recycling apparatus according to claim 5, wherein the interference member comprises an interference roller attached obliquely to the other two sides of the base, and a motor for rotating the interference roller. Foreign matter removal device.
  7. 　前記干渉ローラの表面が凹凸面となっていることを特徴とする請求項６に記載の廃ブラスチックの異物除去装置。
          7. The apparatus for removing foreign matter from waste plastics according to claim 6, wherein the interference roller has an uneven surface.
PCT/JP2022/041606 2021-11-08 2022-11-08 Apparatus for removing foreign substances from waste plastic WO2023080256A1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2021181639 2021-11-08
JP2021-181639 2021-11-08
JP2022-030338 2022-02-28
JP2022030338A JP7217560B1 (en) 2021-11-08 2022-02-28 Foreign matter removal equipment for waste plastic
JP2022-069900 2022-04-21
JP2022069900A JP7157500B1 (en) 2022-04-21 2022-04-21 X-ray inspection device

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09127017A (en) * 1995-10-31 1997-05-16 Shimazu Mekutemu Kk X-ray foreign-matter inspection apparatus with metering function and product inspection method using the apparatus
WO1998011456A1 (en) * 1996-09-12 1998-03-19 Anritsu Corporation Apparatus for detecting foreign matter with high selectivity and high sensitivity by image processing
JP2002267637A (en) * 2001-03-09 2002-09-18 Tokuyama Corp Foreign matter detecting unit
JP2007105582A (en) * 2005-10-12 2007-04-26 Kubota Corp Sorting apparatus
JP3152920U (en) * 2009-05-18 2009-08-20 株式会社セイホー Sorting device
JP2015158406A (en) * 2014-02-24 2015-09-03 アンリツ産機システム株式会社 X-ray inspection apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09127017A (en) * 1995-10-31 1997-05-16 Shimazu Mekutemu Kk X-ray foreign-matter inspection apparatus with metering function and product inspection method using the apparatus
WO1998011456A1 (en) * 1996-09-12 1998-03-19 Anritsu Corporation Apparatus for detecting foreign matter with high selectivity and high sensitivity by image processing
JP2002267637A (en) * 2001-03-09 2002-09-18 Tokuyama Corp Foreign matter detecting unit
JP2007105582A (en) * 2005-10-12 2007-04-26 Kubota Corp Sorting apparatus
JP3152920U (en) * 2009-05-18 2009-08-20 株式会社セイホー Sorting device
JP2015158406A (en) * 2014-02-24 2015-09-03 アンリツ産機システム株式会社 X-ray inspection apparatus

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