WO2022138268A1 - Structure de protection contre les rayons x pour dispositif comprenant une unité d'irradiation par rayons x - Google Patents

Structure de protection contre les rayons x pour dispositif comprenant une unité d'irradiation par rayons x Download PDF

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Publication number
WO2022138268A1
WO2022138268A1 PCT/JP2021/045764 JP2021045764W WO2022138268A1 WO 2022138268 A1 WO2022138268 A1 WO 2022138268A1 JP 2021045764 W JP2021045764 W JP 2021045764W WO 2022138268 A1 WO2022138268 A1 WO 2022138268A1
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WIPO (PCT)
Prior art keywords
carry
ray
shielding structure
ray shielding
inspected object
Prior art date
Application number
PCT/JP2021/045764
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English (en)
Japanese (ja)
Inventor
芳和 立石
亮 角谷
Original Assignee
株式会社サタケ
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Publication date
Application filed by 株式会社サタケ filed Critical 株式会社サタケ
Priority to CN202180085566.7A priority Critical patent/CN116648758A/zh
Publication of WO2022138268A1 publication Critical patent/WO2022138268A1/fr

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    • 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
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/10—Organic substances; Dispersions in organic carriers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/02—Observation devices permitting vision but shielding the observer
    • G21F7/03—Windows, e.g. shielded
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/04—Shielded glove-boxes
    • G21F7/047—Shielded passages; Closing or transferring means between glove-boxes

Definitions

  • the present invention relates to, for example, an X-ray shielding structure in an apparatus such as an optical sorter that determines and sorts the quality of an inspected object from a transmitted image of X-rays.
  • an X-ray inspection device for inspecting the internal state of an inspected object by a transmitted image obtained by transmitting X-rays through the inspected object.
  • the X-ray inspection apparatus disclosed in Patent Document 1 has a structure in which inspection is performed while blocking X-rays.
  • the X-ray inspection apparatus includes a belt conveyor extending linearly in the horizontal direction and an X-ray irradiation unit arranged above the middle part of the belt conveyor, and the X-ray irradiation unit is a belt conveyor located directly below. By emitting X-rays toward the upper inspection area, the X-rays are applied to the object to be inspected passing through the inspection area by the transport operation by the belt conveyor.
  • the inspection area on the belt conveyor and the X-ray irradiation unit are covered with a shielding cover, and the inspected object is carried into the shielding cover to the upstream and downstream portions of the belt conveyor in the shielding cover.
  • a mouth and an outlet for carrying out the object to be inspected from the inside of the shielding cover are formed.
  • an X-ray shielding sheet having a shape corresponding to the carry-in entrance and the carry-out port is hung like a curtain, and the X-ray shielding sheet is , It rotates around a rotation axis extending in a horizontal direction orthogonal to the transport direction of the belt conveyor.
  • each object to be sequentially conveyed by the belt conveyor pushes the X-ray shielding sheet by the conveying operation by the belt conveyor and rotates the X-ray shielding sheet to enter the inspection area and exit from the inspection area. And are to be done respectively.
  • each X-ray shielding sheet is pushed by the inspected object and rotates every time the inspected object is inspected in the inspection area of the belt conveyor.
  • the rotating part of the shielding sheet cannot perform a smooth rotating operation due to deterioration over time, and as a result, the X-ray shielding sheet does not hang down to the bottom during the rotating operation and is connected to the carry-in entrance or carry-out port. There is a risk that the device will continue to operate with a large gap between them.
  • the X-ray shielding sheet as in Patent Document 1 has a rotating portion, there is a problem that the number of parts increases and the assembly takes time and the cost increases.
  • the inspected object is food or the like
  • the inspected object in order to avoid the occurrence of scratches and deformations and the occurrence of bacteria adhesion in terms of food hygiene, the inspected object is invaded into the inspection area or exits from the inspection area.
  • the X-ray shielding sheet should not be brought into contact with the sheet.
  • the present invention has been made in view of such a point, and an object of the present invention is that a device equipped with an X-ray irradiation unit can be used repeatedly with peace of mind, and moreover, it is used as a shielding means for shielding X-rays. It is an object of the present invention to provide a low-cost X-ray shielding structure capable of carrying in and out an inspected object to an inspected area without contacting the inspected object.
  • the present invention is generated inside the apparatus by using a guide body used for carrying the inspected object into the transport means or carrying out the inspected object from the transport means. It is characterized by devising ways to block X-rays.
  • the following measures were taken for the X-ray shielding structure of the device equipped with the X-ray irradiation unit that irradiates the inspected object transported by the transport means with X-rays.
  • the transport means and the X-ray irradiation unit are surrounded, and the carry-in inlet for carrying the inspected object into the upstream portion of the transport means and the inspected object from the downstream portion of the transport means.
  • a shielding cover in which an outlet for carrying out the inspected object is formed, and a guide passage portion for guiding the carrying-in of the inspected object to the transporting means and guiding the carrying-out of the inspected object from the transporting means.
  • the first and second guide bodies are provided inside, and in the first and second guide bodies, each guide passage portion of the first and second guide bodies is connected to the carry-in port and the carry-out port. It is characterized in that it is inclined with respect to the carry-in entrance and the carry-out port.
  • one end opening corresponds to the X-ray emitting portion of the X-ray irradiation unit, while the other end opening is set in the transport means, which is arranged inside the shielding cover. It is characterized by having a shielding cylinder that approaches the inspection area of the object to be inspected.
  • the shielding cover is formed of a transparent or translucent resin material, and an observation window for observing the inside of the shielding cover is formed. It is characterized by.
  • the transporting means includes a belt conveyor, and the observation window has an elongated shape extending along the transporting direction of the belt conveyor.
  • the carry-in port is open laterally, and the first guide body has a shape extending diagonally upward from the carry-in port.
  • a shielding member is provided below the first guide body to cover both the lower end edge portion of the first guide body and the lower end edge portion of the carry-in entrance. ..
  • the first guide body that guides the object to be inspected to the transport means is in a posture of blocking the carry-in entrance of the shielding cover, while the second guide that guides the object to be inspected from the transport means to the outside of the transport means. Since the body is in a posture of blocking the carry-out port of the shielding cover, the operator can safely perform the work while the apparatus is operating around the apparatus equipped with the X-ray irradiation unit. Further, since there is no movable part as in Patent Document 1 in the structure that blocks the part where the inspected object is carried in and out of the inspection area in the transport means, even if the device is repeatedly used, the carry-in inlet and the carry-out port may be caused by failure or deformation.
  • the inspected object does not come into contact with the shield that shields X-rays at the timing when the inspected object is carried in and out of the inspection area in the transport means, for example, when the inspected object is food or the like, the inspected object is inspected.
  • the inspection object can be inspected hygienically.
  • the X-rays are irradiated to the inside of the shielding cylinder, and the X-rays are hardly irradiated to the area other than the inspection area of the transport means. Therefore, the work performed by the operator outside the apparatus can be performed more safely. can.
  • the operator can visually observe the inside of the shielding cover from the observation window to know the state of the transport means and the like without removing the shielding cover from the apparatus. Therefore, it is not necessary to wastefully perform complicated work such as removing the shielding cover from the device every time maintenance is performed, and it is possible to efficiently perform confirmation work and maintenance work while the operator is outside the shielding cover.
  • the visible area inside the shield cover of the worker becomes wider in the transport direction of the belt conveyor, it becomes easier for the worker to understand the degree of the meandering state of the endless belt from the outside of the shield cover, which is wasteful. It is possible to reduce as much as possible the need to remove the shielding cover and perform maintenance work.
  • the gap generated between the transport means and the first guide body is covered with the shielding member, the leakage of X-rays to the outside of the shielding cover on the upstream side of the apparatus can be reliably prevented.
  • FIG. 3 is a schematic cross-sectional view taken along the line III-III of FIG. It is a perspective view of the carry-in slider. It is a perspective view of a discharge chute.
  • the optical sorter 10 inspects foods such as almonds and beans, or a large number of granules G1 (inspected objects) such as plastic pieces while sequentially transporting them, and then determines whether or not the product is good or bad. It is configured to sort out good products and defective products, and includes a machine frame 11 made of a plurality of metal frames.
  • the carry-in unit 2, the transfer unit 3, the first inspection unit 4, the second inspection unit 5, the sorting unit 6, and the carry-out unit 7 are attached to the machine frame 11 in order from the upstream side of the apparatus, and the transfer unit 3, the first The second inspection units 4, 5 and the sorting unit 6 are covered with a shielding cover 8.
  • a control unit 9 is connected to the carry-in unit 2, the transport unit 3, the first and second inspection units 4, 5, the sorting unit 6, and the carry-out unit 7.
  • the carry-in unit 2 is provided with a carry-in slider 21 (first guide body) that guides a large number of granular bodies G1 introduced by a vibration feeder (not shown) to the transport unit 3.
  • a carry-in slider 21 first guide body that guides a large number of granular bodies G1 introduced by a vibration feeder (not shown) to the transport unit 3.
  • the carry-in slider 21 extends diagonally downward toward the transport unit 3, and has a substantially plate-shaped bottom surface portion 22 whose guide surface 22a faces diagonally upward on the transport unit 3 side.
  • a side surface portion 23 is erected on both side edges of the bottom surface portion 22 along the extension direction of the bottom surface portion 22.
  • a plurality of thin plate-shaped guide plate portions 24 extending diagonally downward along the both side surface portions 23 are arranged side by side at predetermined intervals in the horizontal direction, and the guide plate portions 24 of each guide plate portion 24 are arranged side by side.
  • a plurality of guide passage portions 25 through which each granular material G1 slides down are formed between them.
  • a passage cover 26 having a rectangular plate shape is provided on the upper portion of the bottom surface portion 22, and the passage cover 26 covers a portion of each guide passage portion 25 excluding the upstream side region and the downstream side region.
  • a proximity sensor 27 is attached to one side of the lower end edge of the passage cover 26, and the proximity sensor 27 can detect whether or not the carry-in slider 21 is attached to the transfer unit 3. ing.
  • the carry-in slider 21 is adapted to sequentially guide each of the granules G1 to positions at equal intervals in the width direction of the transport unit 3 by passing each of the granules G1 through each of the guide passage portions 25.
  • the transport unit 3 includes a belt conveyor 31 (conveyor means) that extends horizontally from the lower end of the carry-in slider 21 to the downstream side of the device.
  • the belt conveyor 31 includes a drive roller 32 located below the lower end of the carry-in slider 21 and a driven roller 33 located on the downstream side of the device and having a roller diameter smaller than that of the drive roller 32.
  • a rubber endless belt 34 is wound around the driven roller 33.
  • the endless belt 34 is adapted to sequentially move around by the rotational operation of the drive roller 32 and the driven roller 33 to sequentially convey each of the granular bodies G1 placed on the outer peripheral surface. Then, each of the conveyed granular materials G1 passes through the first inspection region R1 set in the middle of the endless belt 34, and then sequentially falls diagonally downward from the downstream end in the transport direction to reach the second inspection region R2. It is designed to pass through.
  • the first inspection unit 4 inspects the outer shape or the internal state of the granular material G1, and has an X-ray irradiation unit 41 located above the first inspection region R1 at a predetermined interval and a first inspection region R1. It is equipped with an X-ray detector 42 installed below.
  • the X-ray irradiation unit 41 includes an X-ray emitting unit 41a that emits X-rays directly below, and the X-rays emitted from the X-ray emitting unit 41a are conveyed by the endless belt 34 and pass through the first inspection region R1.
  • the granules G1 to be irradiated are irradiated.
  • the X-ray detector 42 includes line sensors 42a arranged in a row in the width direction of the belt conveyor 31, and the line sensors 42a can detect X-rays that have passed through the granular material G1.
  • a shielding cylinder 43 having a cylinder center line extending vertically is arranged between the X-ray emitting portion 41a and the first inspection region R1.
  • the shielding cylinder 43 is continuously arranged in the X-ray emitting portion 41a, and the upper end opening is continuously arranged in the first cylinder 43a corresponding to the X-ray emitting portion 41a and the lower portion of the first cylinder 43a.
  • the lower end opening is provided with a second tubular body 43b that approaches the first inspection region R1.
  • the second inspection unit 5 includes a first CCD camera 51a for visible light located above the downstream end of the belt conveyor 31, and a second visible light camera 51a located below the downstream end of the belt conveyor 31.
  • the 2CCD camera 52a and the NIR camera 53a for near-infrared light arranged at a predetermined interval on the downstream side of the device of the first CCD camera 51a are provided.
  • a first mirror 51b having a posture tilted with respect to the shooting direction of the first CCD camera 51a is disposed diagonally downward on the downstream side of the device of the first CCD camera 51a, while diagonally upward on the downstream side of the device of the second CCD camera 52a.
  • a first background plate 51c is arranged at the position of, and a second inspection region R2 is located between the first mirror 51b and the first background plate 51c.
  • a pair of first visible light sources 51d are arranged above the first background plate 51c, and the first CCD camera 51a is the upper surface of the granular body G1 that reflects on the first mirror 51b when passing through the second inspection region R2. It is designed to shoot.
  • a second mirror 52b having a posture tilted with respect to the shooting direction of the second CCD camera 52a is arranged, while at a position diagonally downward on the upstream side of the first mirror 51b.
  • the second background plate 52c is arranged, and the second inspection region R2 is located between the second mirror 52b and the second background plate 52c.
  • a pair of second visible light sources 52d are arranged below the second background plate 52c, and the second CCD camera 52a is the lower surface of the granular body G1 that reflects on the second mirror 52b when passing through the second inspection region R2. It is designed to shoot.
  • a third mirror 53b in an inclined posture with respect to the shooting direction of the NIR camera 53a is arranged diagonally above the device upstream side of the NIR camera 53a, while it is located on the downstream side of the device of the second mirror 52b.
  • the third background plate 53c is arranged, and the second inspection region R2 is located between the third mirror 53b and the third background plate 53c.
  • a pair of near-infrared light sources 53d are arranged between the pair of second visible light sources 52d, and the NIR camera 53a displays the granular body G1 reflected on the third mirror 53b when passing through the second inspection region R2. It is designed to shoot.
  • the sorting unit 6 includes an ejector 61 located below the NIR camera 53a.
  • the ejector 61 includes an ejection nozzle 61a in which the outlet of compressed air faces diagonally downward on the upstream side of the device, and the ejection nozzle 61a can eject compressed air toward a position on the downstream side of the device in the second inspection region R2. It has become.
  • the unloading unit 7 has a substantially V-shape with the open side facing diagonally downward on the downstream side of the device when viewed from the front, and the discharge chute 71 having a wide shape in the width direction of the belt conveyor 31. (Second guide body) is provided.
  • the discharge chute 71 has a substantially square cylinder shape that opens up and down, and has a defective product discharge portion 72 in which a defective product guide passage portion 72a for guiding the discharge of defective products of the granular material G1 is formed, and a cylinder center line.
  • the portion 73 is continuously provided in the upper portion on the downstream side of the device in the defective product discharging portion 72.
  • the upper surface portion 73c of the non-defective product discharge portion 73 on the downstream side of the device has a door structure in a substantially upper half portion due to a hinge portion 73b extending in the width direction of the belt conveyor 31 provided in the middle portion. ..
  • the continuous portion between the defective product discharge unit 72 and the non-defective product discharge unit 73 inside the discharge chute 71 is rotatable about a rotation axis extending in the width direction of the belt conveyor 31.
  • a sorting port adjusting plate 74 is provided, and as shown in FIG. 5, the sorting port adjusting plate 74 operates the adjusting pin 75 provided on the side surface portion of the discharge chute 71 to change the rotation position.
  • the opening ratios of the defective product discharging unit 72 and the non-defective product discharging unit 73 on the second inspection region R2 side are changed.
  • the shielding cover 8 includes a first cover portion 81 that surrounds the first inspection unit 4, a second cover portion 82 that surrounds the upstream region of the transport unit 3, and a third cover portion 83 that surrounds the downstream region of the transport unit 3.
  • the present invention comprises a fourth cover portion 84 surrounding the second inspection unit 5 and the sorting unit 6, and a shielding member 85 located below the first cover portion 81, and the carry-in slider 21, the discharge chute 71, and the shielding cover 8.
  • the X-ray shielding structure 1 of the above is configured.
  • the first cover portion 81 has a rectangular parallelepiped shape protruding upward from the second and third cover portions 82, 83.
  • a carry-in inlet 82d for carrying in the granular material G1 is formed so as to open laterally in the upstream portion of the belt conveyor 31, and when the carry-in slider 21 is attached to the machine frame 11.
  • the downstream side of the carry-in slider 21 is connected to the carry-in entrance 82d without a gap, and the guide passage portion 25 is in an inclined posture with respect to the carry-in entrance 82d so that the second cover portion 82 and the guide passage portion 25 communicate with each other. It has become.
  • the carry-in slider 21 has a shape extending diagonally upward from the carry-in entrance 82d.
  • the region of the second cover portion 82 from the front side of the device to the position closer to the back side of the middle portion can rotate up and down about the rotation axis extending in the transport direction of the belt conveyor 31.
  • the upstream opening / closing cover portion 82a is formed, and a first observation window 82b capable of observing the inside of the second cover portion 82 is formed on the upper surface of the upstream opening / closing cover portion 82a.
  • the first observation window 82b is made of a transparent resin material and has an elongated shape extending along the transport direction of the belt conveyor 31.
  • a second observation window 82c capable of observing the inside of the second cover portion 82 is formed on the upper surface of the second cover portion 82 excluding the upstream opening / closing cover portion 82a.
  • the second observation window 82c is made of a transparent resin material, extends parallel to the first observation window 82b, and has a wider shape than the first observation window 82b.
  • the shielding member 85 has a substantially C-shaped cross section and has a shape extending in the width direction of the belt conveyor 31 so as to cover both the lower end edge portion of the carry-in slider 21 and the lower end edge portion of the carry-in inlet 82d. ing.
  • the region of the third cover portion 83 from the front side of the device to the position closer to the back side of the middle portion is the downstream side opening / closing cover portion 83a that can rotate up and down about the rotation axis extending in the transport direction of the belt conveyor 31.
  • a third observation window 83b is formed on the upper surface of the downstream opening / closing cover portion 83a so that the inside of the third cover portion 83 can be observed.
  • the third observation window 83b is made of a transparent resin material and has an elongated shape extending along the transport direction of the belt conveyor 31.
  • a fourth observation window 83c capable of observing the inside of the third cover portion 83 is formed on the upper surface of the third cover portion 83 except for the downstream opening / closing cover portion 83a.
  • the fourth observation window 83c is made of a transparent resin material, extends parallel to the third observation window 83b, and has a wider shape than the third observation window 83b.
  • the fourth cover portion 84 is from the upper cover portion 84a surrounding the region above the second inspection region R2, the middle cover portion 84b surrounding the second inspection region R2, and the second inspection region R2.
  • a lower cover portion 84c that surrounds the lower region is provided, and the upper cover portion 84a has a rectangular parallelepiped shape that protrudes upward from the third cover portion 83.
  • An opening / closing door 84d having an observation window 84e made of transparent resin is provided on the front side of the device of the middle cover portion 84b, and the opening / closing door 84d can detect whether or not the opening / closing door 84d is open.
  • the detection sensor 84f is attached.
  • a carry-out outlet 84 g for carrying out the granular material G1 from the downstream portion of the belt conveyor 31 is formed so as to open diagonally downward, and when the discharge chute 71 is attached to the machine frame 11.
  • the upstream side of the discharge chute 71 is connected to the carry-out port 84 g without a gap, and the defective product guide passage portion 72a and the non-defective product guide passage portion 73a are tilted with respect to the carry-out outlet 84 g, and the fourth cover portion 84 and the defective product guide passage portion are provided.
  • the 72a and the non-defective guide passage portion 73a communicate with each other.
  • the discharge chute 71 has a shape extending diagonally downward from the carry-out port 84 g.
  • the control unit 9 is designed to control the drive operation of the drive roller 32 on the belt conveyor 31.
  • the control unit 9 determines whether or not the granular material G1 is a non-defective product based on whether or not the detected value obtained by the line sensor 42a deviates from the reference value, and the first CCD camera 51a, the second CCD camera 52a, and the NIR camera 53a use the control unit 9.
  • the obtained captured image is subjected to arithmetic processing to determine whether or not the granular material G1 is a non-defective product depending on whether or not it deviates from the reference value.
  • the granular material G1 is determined to be a defective product, it is compressed into an ejector 61.
  • An air ejection signal is output, compressed air is ejected from the ejection nozzle 61a to the granular material G1 determined to be a defective product to fall from the downstream end of the belt conveyor 31, and the defective product is discharged in the falling direction of the granular material G1. It is designed to be changed to the unit 72 side.
  • control unit 9 is adapted to stop the X-ray irradiation unit 41 when it is determined that the carry-in slider 21 has been removed from the device based on the detection signal from the proximity sensor 27.
  • control unit 9 is adapted to stop the X-ray irradiation unit 41 when it is determined that the opening / closing door 84d is opened based on the detection signal from the opening / closing detection sensor 84f.
  • an open / close detection sensor is also attached to the upstream open / close cover portion 82a, the downstream open / close cover portion 83a, etc., and the control unit 9 is opened with the cover portion based on the detection signals from those sensors. If it is determined that the X-ray irradiation unit 41 has been stopped.
  • the carry-in slider 21 that guides the granular material G1 to the transfer unit 3 is in a posture of blocking the carry-in inlet 82d of the shielding cover 8, while the granular body G1 is transferred from the transfer unit 3 to the transfer unit. Since the discharge chute 71 leading to the outside of 3 is in a posture of blocking the carry-out port 84 g of the shielding cover 8, the operator operates the optical sorting machine 10 around the optical sorting machine 10 equipped with the X-ray irradiation unit 41. You can work safely inside.
  • the optical sorter 10 is repeated. Even if it is used, it is possible to surely prevent the equipment from operating with the carry-in inlet 82d and the carry-out port 84g wide open due to failure or deformation, and the number of parts constituting the relevant part is small. As a result, the number of assembly steps is reduced, and the low-cost optical sorter 10 can be obtained.
  • the granular material G1 does not come into contact with the shield that shields X-rays at the timing when the granular material G1 is carried in and out of the first and second inspection regions R1 and R2 in the transport unit 3, for example, the granular material G1 does not come into contact with the shield.
  • the body G1 is a food or the like, the granular body G1 can be hygienically inspected.
  • the shielding cylinder 43 is provided between the X-ray irradiation unit 41 and the X-ray detector 42, X-rays are irradiated to the inside of the shielding cylinder 43, and the first and the first of the transport unit 3 and the transport unit 3 are irradiated. Almost no X-rays are emitted in areas other than the second inspection areas R1 and R2. Therefore, the work performed by the operator outside the optical sorter 10 can be performed more safely.
  • the shielding cover 8 is provided with the first observation window 82b, the second observation window 82c, the third observation window 83b, and the fourth observation window 83c from which the inside can be seen, the operator
  • the shielding cover 8 is visually observed from the optical sorter 10 by visually observing the inside of the shielding cover 8 from the first observation window 82b, the second observation window 82c, the third observation window 83b, and the fourth observation window 83c.
  • the state of the transport unit 3 and the like can be known without removing the window. Therefore, it is not necessary to wastefully perform complicated work such as removing the shielding cover 8 from the optical sorter 10 every time maintenance is performed, and the confirmation work and maintenance work can be efficiently performed while the operator is outside the shielding cover 8. It can be carried out.
  • first observation window 82b, the second observation window 82c, the third observation window 83b, and the fourth observation window 83c have an elongated shape in the transport direction of the belt conveyor 31, and thus shield the operator.
  • the visible area inside the cover 8 becomes wider in the transport direction of the belt conveyor 31. Therefore, it becomes easier for the operator to understand the degree of the meandering state of the endless belt 34 from the outside of the shielding cover 8, and it is possible to reduce unnecessary removal of the shielding cover 8 and maintenance work.
  • the shielding member 85 since the gap generated between the transport unit 3 and the carry-in slider 21 is covered by the shielding member 85, leakage of X-rays to the outside of the shielding cover 8 on the upstream side of the device can be reliably prevented, which is high. It can be an optical sorter 10 having safety.
  • each granular material G1 is carried into the transport unit 3 through the carry-in inlet 82d by the carry-in slider 21, and each granular material G1 is carried from the carry-out unit 3 through the carry-out port 84 g by the discharge chute 71.
  • the carry-in slider 21 and the discharge chute 71 are carried out, the carry-in slider 21 and the discharge chute 71 may have other shapes as long as the granule G1 can be carried in to the transport unit 3 and the granule G1 can be carried out from the transport unit 3. good.
  • first observation window 82b, the second observation window 82c, the third observation window 83b, the fourth observation window 83c, and the observation window 84e of the present invention are made of a transparent resin material, but are translucent. It may be made of a resin material, or may be made of another material (for example, glass or the like) as long as the inside of the shielding cover 8 can be observed.
  • the X-ray shielding structure 1 is applied by the optical sorter 10 for sorting the granular material G1, but the X-ray shielding structure 1 of the present invention is also applied to other devices provided with the X-ray irradiation unit. Structure 1 is applicable.
  • the present invention is suitable for an X-ray shielding structure in an apparatus such as an optical sorter that determines and sorts the quality of an inspected object from, for example, a transmitted image of X-rays.

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  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

La présente invention concerne un couvercle de protection (8) entourant une unité de transport (3) et une unité d'irradiation par rayons X (41) comprenant une ouverture de chargement (82d) et une ouverture de déchargement (84g) formées en son sein. Une unité de passage de guidage (25) d'un coulisseau de chargement (21) guide les granulés (G1) dans l'unité de transport (3). Une unité de passage de guidage de produit défectueux (72a) et une unité de passage de guidage de produit non défectueux (73a) d'une goulotte de sortie (71) guident les granulés (G1) hors de l'unité de transport (3). L'unité de passage de guidage (25) du coulisseau de chargement (21) est inclinée par rapport à l'ouverture de chargement (82d). La goulotte de sortie (71) est inclinée par rapport à l'ouverture de déchargement (84g).
PCT/JP2021/045764 2020-12-22 2021-12-13 Structure de protection contre les rayons x pour dispositif comprenant une unité d'irradiation par rayons x WO2022138268A1 (fr)

Priority Applications (1)

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CN202180085566.7A CN116648758A (zh) 2020-12-22 2021-12-13 具备x射线照射单元的装置的x射线屏蔽结构

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JP2020212069A JP7099513B2 (ja) 2020-12-22 2020-12-22 Ｘ線照射ユニットを備えた装置のｘ線遮蔽構造
JP2020-212069 2020-12-22

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WO2022138268A1 true WO2022138268A1 (fr) 2022-06-30

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485199U (fr) * 1990-11-30 1992-07-23
JPH11304726A (ja) * 1998-04-24 1999-11-05 Matsushita Electric Ind Co Ltd Ｘ線による検査方法及びｘ線検査装置
JP2012078303A (ja) * 2010-10-06 2012-04-19 Yamato Scale Co Ltd Ｘ線検査装置
JP2014219267A (ja) * 2013-05-08 2014-11-20 株式会社 システムスクエア Ｘ線検査装置
JP2016003952A (ja) * 2014-06-17 2016-01-12 アンリツインフィビス株式会社 Ｘ線検査装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0949883A (ja) * 1995-08-07 1997-02-18 Toshiba Corp 異物検査装置
JP4438991B2 (ja) * 2004-02-26 2010-03-24 株式会社イシダ Ｘ線検査装置
JP2006047032A (ja) * 2004-08-03 2006-02-16 Ishida Co Ltd Ｘ線検査装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0485199U (fr) * 1990-11-30 1992-07-23
JPH11304726A (ja) * 1998-04-24 1999-11-05 Matsushita Electric Ind Co Ltd Ｘ線による検査方法及びｘ線検査装置
JP2012078303A (ja) * 2010-10-06 2012-04-19 Yamato Scale Co Ltd Ｘ線検査装置
JP2014219267A (ja) * 2013-05-08 2014-11-20 株式会社 システムスクエア Ｘ線検査装置
JP2016003952A (ja) * 2014-06-17 2016-01-12 アンリツインフィビス株式会社 Ｘ線検査装置

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CN116648758A (zh) 2023-08-25
JP7099513B2 (ja) 2022-07-12

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