JP2010237109A - X-ray inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple-structured X-ray inspection device which minimizes X-ray leakage. <P>SOLUTION: In this X-ray inspection device 100, a commodity 900 is conveyed on a belt conveyor 800 to inspect the commodity 900 through the X-ray 210 irradiated from an X-ray irradiation equipment 200. The belt conveyor 800 for conveying the commodity 900 includes a pair of pilot guides 700 in order to guide the commodity 900 on the belt conveyor 800. Further an X-ray leakage-preventive curtain 500 is arranged between the pair of pilot guides 700 on upstream and downstream sides of conveying on the belt conveyor 800. The X-ray leakage-preventive curtain 500 consists of rotor plates 501a, 502a, 503a and 504a with one of various plural widths in the width direction of the belt conveyor 800, and rotor plates 501b, 502b, 503b and 504b with the other width. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an X-ray inspection apparatus that irradiates an article with X-rays and detects foreign matter in the article.

  Conventionally, an X-ray inspection apparatus or the like has been used to detect foreign matter in an article. R & D is being conducted daily on these X-ray inspection apparatuses.

  Patent Document 1 discloses an inexpensive X-ray foreign substance inspection apparatus that can be used in a wide range regardless of the size of the inspection object.

  In the X-ray foreign substance inspection apparatus described in Patent Document 1, in the X-ray foreign substance inspection apparatus that detects the foreign substance contained in the inspection object using transmitted X-rays, a horizontal conveyor that conveys the inspection object, An X-ray leakage protection good which is disposed in the vicinity of the start end portion and the end portion and is pushed up by transport of the inspection object to form a passage space for the inspection object according to the size of the inspection object. The line leakage protection goodwill is divided in the vertical direction so that the passage space can be easily formed, and further includes an X-ray leakage protection goodwill having a structure that can be refracted in multiple stages in the horizontal direction. Is.

Japanese Patent No. 3932479

  However, for example, the X-ray foreign substance inspection apparatus described in Patent Document 1 has a structure that can be refracted in multiple stages in the horizontal direction. Therefore, in this structure, a large number of rotating shafts for refracting in multiple stages are required, and the frictional force of the rotating shafts, which is not a problem with several, also requires a large force as the number increases.

  Further, in the X-ray leakage protection goodwill (see FIG. 9 of Patent Literature 1) in the conventional X-ray foreign substance inspection apparatus described in Patent Literature 1, individual goodwill (hereinafter referred to as strip-like goodwill) divided in the vertical direction. As a result, the X-ray leakage greatly occurs. In addition, since the light is refracted in multiple stages, it is necessary to shield the gap generated when the multiple refracting parts are refracted, which makes the structure complicated and unsuitable for maintenance. Moreover, since X-rays are invisible, it is necessary to pay particular attention to shielding against a large number of refractive parts.

Further, in order to bring the inspection object into the X-ray foreign substance inspection apparatus described in Patent Document 1, a guide for guiding the inspection object on the conveyor is required. However, X-ray leakage protection goodwill (see FIG. 9 of Patent Document 1). The width of the guide needs to be adjusted to the reference), and the width of the guide cannot be adjusted in order to efficiently inspect the inspection object.
That is, the flow rate of the object to be inspected is changed according to the planned production quantity, and the width of the conveyor provided on the upstream side or the downstream side of the X-ray foreign matter inspection apparatus may be changed. When the X-ray foreign matter inspection apparatus provided with the X-ray leakage protection good described in Patent Document 1 is applied to these, the guide and the X-ray leakage protection goodwill cannot be applied because the X-ray leakage protection goodwill cannot be applied to the guide. There may be a gap between them, and there is a risk of X-ray leakage.

  In general, in an X-ray foreign matter inspection apparatus, an object to be inspected may be food or the like. In this case, maintenance is particularly required, and it is desired that maintenance can be easily performed.

An object of the present invention is to provide an X-ray inspection apparatus capable of minimizing X-ray leakage with a simple structure.
An object of the present invention is to provide an X-ray inspection apparatus that has a simple structure, minimizes X-ray leakage, and is easy to maintain.

(1)
An X-ray inspection apparatus according to the present invention is an X-ray inspection apparatus that inspects an object to be inspected by transmitted X-rays irradiated from an X-ray source. A pair of guide members for guiding the object to be inspected, and an X-ray leakage prevention means disposed between the pair of guide members on the upstream side and the downstream side of the conveyance unit, Is composed of X-ray leakage preventing members having a plurality of different widths in the width direction of the conveying means.

  In the X-ray inspection apparatus according to the present invention, a pair of guide members is provided in the transport means for transporting the inspection object, and the inspection object is guided on the transport means. Further, an X-ray leakage preventing means is disposed between the pair of guide members on the upstream side and the downstream side of the conveying means. The X-ray leakage prevention means is composed of X-ray leakage prevention members having a plurality of different widths in the width direction of the conveying means.

Thus, even when the width of the pair of guide members is changed, the X-ray leakage prevention means is composed of X-ray leakage prevention members having a plurality of types of widths. By changing, the X-ray leakage prevention means can be adjusted to an optimum width.
As a result, the X-ray leakage preventing means can be provided between the pair of guide members, so that X-ray leakage can be reliably prevented. For example, the X-ray leakage prevention means can be adjusted at a pitch of 5 mm by changing the combination.

(2)
The inspected product may be a product before packaging composed of a plurality of identical items.

  In this case, the object to be inspected is a product before packaging consisting of a plurality of identical items. Therefore, the width of the X-ray leakage preventing means can be adjusted even when the width of the pair of guide members is changed so as to adjust the conveyance amount of the inspection object so that the inspection object can be optimally inspected. Therefore, X-ray leakage can be reliably prevented. As a result, it is possible to increase the inspection accuracy for the inspection object without reducing the influence of X-ray transmission on the inspection object.

(3)
The X-ray leakage prevention means includes one or more wide X-ray leakage prevention members disposed in the vicinity of the guide member, and one or more narrow X-ray leakage preventions between the wide X-ray leakage prevention members. A member may be provided.

In this case, one or a plurality of wide X-ray leakage prevention members are disposed between the pair of guide members and in the vicinity of the guide member, and one narrow X-ray leakage prevention member is provided at the center of the conveying means. Or a plurality of them are provided. Therefore, X-ray leakage can be minimized. That is, generally, a large amount of the inspection object is conveyed to the central part of the conveying means, and a small amount of the inspection object is conveyed to the vicinity of the guide member.
In this case, since the narrow X-ray leakage prevention member is provided in the central portion of the conveyance means, even when the X-ray leakage prevention member in the central portion rotates to convey the inspection object, It is possible to minimize the gap between the X-ray leakage prevention member or the number of X-ray leakage prevention members moved by the product.

(4)
The X-ray leakage prevention means includes one X-ray leakage prevention member having one width, and another X having a width 1.3 to 1.5 times that of one X-ray leakage prevention member having one width. It may consist of a wire leakage prevention member.

  In this case, the X-ray leakage prevention means includes one X-ray leakage prevention member having one width and another X-ray leakage having a width 1.5 times that of one X-ray leakage prevention member having one width. It consists of a prevention member. For example, when one X-ray leakage preventing member having one width has a width of 10 mm, the other X-ray leakage preventing member has a width of 15 mm. As a result, the width of the X-ray leakage preventing means can be adjusted at a 5 mm pitch. When one X-ray leakage preventing member having one width has a width of 15 mm, the other X-ray leakage preventing member may have a width of 20 mm. As a result, the width of the X-ray leakage prevention means can be adjusted with a pitch of 5 mm.

(5)
The guide member has a guide member moving mechanism that moves in the horizontal direction from the transfer surface of the transfer means, and the X-ray leakage prevention member has an X-ray leakage prevention member move mechanism that moves in the horizontal direction from the transfer surface of the transfer means. May be.

  In this case, the guide member is moved in the horizontal direction from the transfer surface of the transfer means by the guide member moving mechanism, and the X-ray leakage prevention member is moved in the horizontal direction from the transfer surface of the transfer means by the X-ray leakage prevention member moving mechanism. The As a result, during maintenance of the X-ray inspection apparatus, one of the pair of guide members can be removed, the X-ray leakage preventing member can be removed, and the other of the pair of guide members can be removed. Further, when changing the width of the pair of guide members, one of the pair of guide members is removed, the X-ray leakage preventing member is replaced or removed, and one of the pair of guide members is attached, so that the pair of guide members can be easily installed. The width of the member can be changed.

Schematic external view showing an example of an X-ray inspection apparatus according to the present invention The schematic diagram which shows an example of the internal structure of the X-ray inspection apparatus which concerns on this invention Schematic plan view showing an example of an X-ray leakage prevention curtain Schematic perspective view for explaining a plurality of rotating plates of an X-ray leakage prevention curtain The typical perspective view for demonstrating the other some rotation board of the X-ray leakage prevention curtain of FIG. Schematic diagram explaining the state of the product passing through the X-ray leakage prevention curtain Schematic diagram explaining the state of the product passing through the X-ray leakage prevention curtain Schematic diagram explaining the state of the product passing through the X-ray leakage prevention curtain Schematic diagram explaining the state of the product passing through the X-ray leakage prevention curtain Schematic diagram explaining the state of the product passing through the X-ray leakage prevention curtain Schematic diagram showing the state of a conventional X-ray inspection device Schematic diagram showing the state of a conventional X-ray inspection device The schematic diagram which shows the state of the X-ray inspection apparatus which concerns on this invention The schematic diagram which shows the state of the X-ray inspection apparatus which concerns on this invention The schematic diagram which shows the state of the X-ray inspection apparatus which concerns on this invention The schematic diagram which shows the state of the X-ray inspection apparatus which concerns on this invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(One embodiment)
FIG. 1 is a schematic external view showing an example of the X-ray inspection apparatus 100 according to the present invention, and FIG. 2 is a schematic view showing an example of the internal structure of the X-ray inspection apparatus 100 according to the present invention.

  As shown in FIG. 1, the X-ray inspection apparatus 100 has an X-ray inspection chamber 300 formed therein. Further, an X-ray irradiation apparatus 200 is built in the X-ray inspection room 300, and a belt conveyor 800 is provided so as to penetrate the X-ray inspection room 300 of the X-ray inspection apparatus 100 as shown in FIG. Is provided.

  Further, an X-ray leakage prevention curtain 500 for preventing X-ray leakage from the opening of the X-ray examination room 300 in FIG. 1 is provided. The detailed structure of the X-ray leakage prevention curtain 500 will be described later.

  The operator drives the X-ray inspection apparatus 100 by operating the touch panel screen MT of the X-ray inspection apparatus 100 shown in FIG. The operator places the product 900 as the inspection object on the belt conveyor 800 and conveys it, and inspects the X-ray inspection chamber 300 of the X-ray inspection apparatus 100 for contamination. Hereinafter, the internal structure of the X-ray examination room 300 of the X-ray examination apparatus 100 will be described.

  As shown in FIG. 2, the X-ray examination room 300 according to the present invention mainly includes an X-ray irradiation apparatus 200, a line sensor 220, an X-ray leakage prevention curtain 500, a guide guide 700, and a belt conveyor 800.

The X-ray leakage prevention curtain 500 includes an X-ray leakage prevention curtain 510 on the entrance side of the X-ray examination room 300 and an X-ray leakage prevention curtain 520 on the exit side. The entrance side X-ray leakage prevention curtain 510 includes a plurality of rotating plates 501 and 502, and the exit side X-ray leakage prevention curtain 520 includes a plurality of rotation plates 503 and 504.
In the present embodiment, it is preferable that the product 900 on the belt conveyor 800 starts to be transported and is transported at a distance of at least 500 mm until it contacts the X-ray leakage prevention curtain 510 on the entrance side. Thereby, the attitude of the product 900 is stabilized, and the inspection efficiency in the X-ray inspection room 300 can be increased.

  The belt conveyor 800 is provided with an endless belt wound around a pair of rollers, and a line sensor 220 that detects X-rays composed of a scintillator and a photodiode element is provided inside the belt conveyor 800. .

  Further, a guide guide 700 is provided on the upper surface of the belt conveyor 800. This guide guide 700 is composed of a pair of members, and is arranged to appropriately perform the X-ray inspection of the product 900 conveyed on the belt conveyor 800.

As shown in FIG. 2, a product 900 to be inspected is placed on a belt conveyor 800. Then, the belt conveyor 800 is driven, and the product 900 moves in the direction of the arrow X1. The products 900 moved in the direction of the arrow X1 are collected at the center of the belt conveyor 800 by a guide guide 700 disposed on the belt conveyor 800. The product 900 pushes up some of the rotating plates 501 of the plurality of rotating plates 501, moves into the X-ray examination chamber 300, passes through the rotating plates 501, and then partially rotates the rotating plates 502. Push 502 to move further.
Next, the product 900 is irradiated with X-rays 210 from the X-ray irradiation apparatus 200, and the X-rays 210 that have passed through the product 900 are incident on the line sensor 220.

  Subsequently, the product 900 that has been subjected to the X-ray inspection pushes up some of the rotating plates 503 of the plurality of rotating plates 503, moves in the direction of the arrow X <b> 1, passes through the rotating plates 503, and then part of the rotating plates 504. The rotary plate 504 is pushed up and moved out of the X-ray examination room 300. And the goods 900 are moved along the guide guide 700, and are conveyed by the optimal width | variety with respect to the belt conveyor 800 of the next process.

  As shown in FIG. 2, the plurality of rotating plates 501 and 502 are provided so as to be relatively shifted in the horizontal direction perpendicular to the direction of the arrow X1. Thereby, X-rays 210 from the X-ray irradiation apparatus 200 can be prevented from leaking through the gaps between the plurality of rotating plates 501 and the gaps between the plurality of rotating plates 502.

  3 is a schematic plan view showing an example of the X-ray leakage prevention curtains 510 and 520, and FIG. 4 is a schematic perspective view for explaining a plurality of rotating plates of the X-ray leakage prevention curtains 510 and 520. FIG. 5 is a schematic perspective view for explaining another plurality of rotating plates of the X-ray leakage prevention curtains 510 and 520 of FIG.

  As shown in FIG. 3, the X-ray leakage prevention curtain 510 includes a plurality of rotating plates 501 and 502, a pedestal 511, and horizontal shafts 512 and 513. A horizontal axis 512 and a horizontal axis 513 are provided on the pedestal 511 at a predetermined interval L, and a plurality of rotary plates 501 are provided along the member 514 so as to be rotatable on the horizontal axis 512, and a plurality of rotatable plates are rotatable on the horizontal axis 513. The rotary plate 502 is provided along with the member 515. Here, the predetermined interval L between the horizontal axis 512 and the horizontal axis 513 is provided at an interval larger than the size of the product 900. The members 514 and 515 are formed so as to be shifted downward from the substantially C-shaped bent portion.

  Similarly, the X-ray leakage prevention curtain 520 includes a plurality of rotating plates 503 and 504, a pedestal 521, and horizontal shafts 522 and 523. A horizontal axis 522 and a horizontal axis 523 are provided on the pedestal 521 at a predetermined interval L, and a plurality of rotating plates 503 are provided along the member 524 so as to be rotatable on the horizontal axis 522 and a plurality of rotatable plates are rotatable on the horizontal axis 523. The rotating plate 504 is provided along with the member 525. Here, the predetermined interval L between the horizontal axis 522 and the horizontal axis 523 is provided at an interval larger than the size of the product 900. The members 524 and 525 are formed so as to be shifted downward from the substantially C-shaped bent portion.

  In addition, long holes are formed in the members 514, 515, 524, and 525, and the long holes are formed so that the positions of the plurality of rotary plates 501 to 504 can be finely adjusted.

  As shown in FIG. 3 and FIG. 4, the plurality of rotating plates 501 to 504 are provided so as to be rotatable around the horizontal axes 512, 513, 522, and 523 without being constrained to each other. As shown in FIG. 4, the plurality of rotating plates 501 to 504 includes rotating plates 501a, 502a, 503a, and 504a having one width and rotating plates 501b, 502b, 503b, and 504b having other widths. Become. The rotating plates 501b, 502b, 503b, and 504b having other widths have a width 1.3 to 1.5 times that of the rotating plates 501a, 502a, 503a, and 504a having one width. In FIG. 4, three rotating plates 501a, 502a, 503a, and 504a having one width are provided at the center, and rotating plates 501b, 502b, 503b, and 504b having other widths are rotated with the one width. Three plates are provided on both sides of the plates 501a, 502a, 503a, and 504a.

  In addition, as shown in FIG. 5, rotating plates 501a, 502a, 503a, and 504a having one width and rotating plates 501b, 502b, 503b, and 504b having other widths may be alternately arranged. .

  For example, when the width H1 of the rotating plates 501a, 502a, 503a, and 504a having one width is 10 mm, the width H2 of the rotating plates 501b, 502b, 503b, and 504b having the other width is 15 mm. For example, when the width H1 of the rotating plates 501a, 502a, 503a, and 504a having one width is 15 mm, the width H2 of the rotating plates 501b, 502b, 503b, and 504b having the other width is 20 mm. Thereby, the entire width can be changed at a pitch of 5 mm by replacing the rotating plates 501a, 502a, 503a, and 504a having one width with the rotating plates 501b, 502b, 503b, and 504b having other widths. A plurality of rotatable plates 501 to 504 can be formed.

  Further, as shown in FIGS. 3, 4, and 5, the plurality of rotating plates 501 to 504 are provided to be bent in a substantially C shape. As shown in FIG. 4, one end side of the substantially C-shape forms a shielding area AR1, and the other end side forms a balance weight area AR2.

  Further, as shown in FIG. 3, the shielding area AR1 and the balance weight area AR2 that form a substantially square shape of the plurality of rotating plates 501,..., 504 are formed at an angle θ1. Note that the length of the shielding area AR1 is larger than that of the balance weight area AR2. Accordingly, the plurality of rotating plates 501 to 504 are disposed in a state of being inclined downward along the direction of the conveying direction X1 of the belt conveyor 800. In the present embodiment, the shielding area AR1 and the balance weight area AR2 are provided at the angle θ1, but the present invention is not limited to this, and may be provided at any other angle.

  As shown in FIG. 3, the plurality of rotating plates 501 to 504 are formed with a gap K with respect to the surface of the belt conveyor 800, and the product 900 is in contact with the plurality of rotating plates 501 to 504. In this case, it is provided so as to be rotatable in the direction of the arrow R1 in the rotation direction about the horizontal axes 512, 513, 522, 523. Details of the state in which the product 900 is conveyed will be described later.

  The plurality of rotating plates 501 to 504 shown in FIG. 3 are made of metal plates. In the present embodiment, the plurality of rotating plates 501 to 504 are made of metal plates. However, the present invention is not limited to this, and a resin kneaded with lead or other members that shield X-rays. It may consist of. Thereby, leakage of X-rays can be prevented. Further, the surfaces of the plurality of rotating plates 501 to 504 are embossed.

  Next, FIGS. 6 to 10 are schematic diagrams for explaining a state in which the product 900 passes through the X-ray leakage prevention curtain 510.

  First, as shown in FIG. 6, the product 900 is conveyed on the belt conveyor 800 in the direction of the arrow X1. Then, the product 900 comes into contact with some of the rotating plates 501 of the plurality of rotating plates 501 of the X-ray leakage prevention curtain 510. That is, it abuts on the rotating plate 501 corresponding to the width of the product 900.

  Then, as shown in FIG. 7, some of the rotating plates 501 of the plurality of rotating plates 501 rotate in the direction of the arrow X1, and the product 900 passes. In this case, not all the plurality of rotating plates 501 rotate in the direction of the arrow R1, but only the rotating plate 501 corresponding to the width of the product 900 rotates in the direction of the arrow R1.

  Subsequently, as shown in FIG. 8, the product 900 passes through the plurality of rotating plates 501, and a part of the rotating plates 501 rotated in the direction of the arrow R1 is rotated in the direction opposite to the arrow R1. The rotation in the direction of -R1 prevents X-ray leakage from the X-ray examination room 300 to the entrance side of the X-ray examination room 300. Then, the product 900 comes into contact with the plurality of rotating plates 502.

  Then, as shown in FIG. 9, some of the plurality of rotating plates 502 rotate in the direction of the arrow R1, and the product 900 passes.

  Finally, as shown in FIG. 10, the product 900 passes through the plurality of rotating plates 502, and a part of the rotating plates 502 of the plurality of rotating plates 502 rotated in the direction of the arrow R1 is an arrow in the direction opposite to the arrow R1. The product 900 can be conveyed into the X-ray examination room 300 while rotating in the direction of -R1 and preventing X-ray leakage.

  As described above, since the plurality of rotary plates 501 and 502 are arranged in a downwardly inclined state, the amount of shaking of the X-ray leakage prevention curtain 510 when the product 900 passes through the X-ray leakage prevention curtain 510 is reduced. Furthermore, since the balance weight area AR2 is provided, the plurality of rotating plates 501 and 502 can be rotated in the direction of the arrow R1 with a minimum force.

  In the present embodiment, a plurality of rotating plates 501 to 504 are provided side by side. However, the present invention is not limited to this, and any other arbitrary number may be provided.

  Next, the plurality of rotating plates 501 to 504 when the width of the guide 700 in FIG. 2 is changed will be described. 11 and 12 are schematic views showing the state of a conventional X-ray inspection apparatus, and FIGS. 13 to 16 are schematic views showing the state of the X-ray inspection apparatus 100 according to the present invention.

  11 (a) and 12 (a) are top views of a conventional X-ray inspection apparatus, and FIGS. 11 (b) and 12 (b) are side views of the conventional X-ray inspection apparatus. The figure is shown.

  As shown in FIGS. 11A and 11B, in the conventional X-ray inspection apparatus, a guide guide 700 is disposed on the belt conveyor 800, and a plurality of rotary plates 501z, 502z, 503z, and 504z are provided.

  Here, in general, in the production line, a change in the conveyance amount of the product 900, an adjustment for reducing the influence of X-ray transmission, a change in the product type of the product 900, a change in the upstream or downstream conveyor, and the like occur. Then, the guide guide is adjusted. For example, consider the case where the guide guide 700 is changed to a guide guide 710 as shown in FIGS.

  In this case, as shown in FIGS. 12A and 12B, the rotating plates 501y, 502y, 503y, and 504y, which are a part of the plurality of rotating plates 501z, 502z, 503z, and 504z, are arranged on the guide guide 710. It will be in the state mounted. As a result, gaps between the belt conveyor 800 and the rotary plates 501y, 502y, 503y, and 504y are generated by the widths of the rotary plates 501y, 502y, 503y, and 504y, so that X-ray leakage occurs.

  Subsequently, in the X-ray inspection apparatus 100 according to the present invention, a plurality of rotating plates 501z, 502z, 503z, and 504z are disposed between the guide guides 700 as shown in FIG. Next, a case where the guide guide 700 is changed will be described.

  For example, as shown in FIG. 14, the guide 700 can be removed in the direction of the arrow Y1. Here, since the X-ray irradiation apparatus 200 is disposed in the vertically upward direction, the guide guide 700 cannot be moved in that direction. In the X-ray inspection apparatus 100 according to the present invention, since the rotating plate does not straddle the guide guide 700, only the guide guide 700 can be removed in the direction of the arrow Y1. Thereby, the X-ray leakage prevention curtain 510 on the entrance side and the X-ray leakage prevention curtain 520 on the exit side can also be removed in the direction of the arrow Y1.

  In the case of performing maintenance, the belt conveyor 800 can be cleaned or maintained by removing the other guide guide 700.

  As shown in FIG. 15, when the guide guide 700 is changed to the guide guide 720, the combination of the plurality of rotating plates 501 a, 501 b, 502 a, and 502 b is changed, and the width of the entrance side corresponding to the guide guide 720 is changed. An X-ray leakage prevention curtain 510 and an X-ray leakage prevention curtain 520 on the outlet side are formed.

  Then, as shown in FIG. 15, the guide guide 720 is attached in the direction of the arrow -Y1, and the X-ray leakage prevention curtain 510 on the inlet side and the X-ray on the outlet side are obtained by rearranging the plurality of rotating plates 501a, 501b, 502a, and 502b. Leak prevention curtain 520 is attached in the direction of arrow -Y1, and one of guide guides 720 is attached.

  Accordingly, as shown in FIG. 16, an X-ray leakage prevention curtain 510 on the entrance side and an X-ray leakage prevention curtain 520 on the exit side having a width corresponding to the guide guide 720 can be formed.

  As described above, in the X-ray inspection apparatus 100, even when the width of the guide guides 700 and 720 is changed, the X-ray leakage prevention curtain 500 has a plurality of rotating plates 501a, Since it consists of 501b, 502a, 502b, the X-ray leakage prevention curtain 500 can be adjusted to the optimum width by changing the combination of the plurality of rotating plates 501a, 501b, 502a, 502b. As a result, the X-ray leakage prevention curtain 500 can be provided between the guide guides 700 and 720, so that X-ray leakage can be reliably prevented.

  In addition, since the guide guide 700 can be freely adjusted, it is possible to increase the inspection accuracy for the product 900 without reducing the influence of X-ray transmission on the product 900.

  Further, when a large amount of product 900 is generally transported to the center of the belt conveyor 800 and a small amount of product 900 is transported to the vicinity of the guide guide 700, a narrow rotating plate 501a is disposed at the center of the transport belt conveyor 800. , 501b are provided, so that even if the rotating plates 501a and 501b in the central portion rotate and convey the product 900, the gap between the belt conveyor 800 and the plurality of rotating plates 501a, 501b, 502a and 502b Can be minimized.

  Since the rotating plates 501a and 501b having one width and the rotating plates 502a and 502b having other widths are included, the width of the X-ray leakage prevention curtain 500 can be adjusted with a pitch of 5 mm.

  In the present embodiment, the X-ray irradiation apparatus 200 corresponds to an X-ray source, the X-ray 210 corresponds to a transmitted X-ray, and the product 900 corresponds to an inspected product and a product before packaging consisting of a plurality of identical items. The X-ray inspection apparatus 100 corresponds to the X-ray inspection apparatus, the belt conveyor 800 corresponds to the conveying means, the X-ray leakage prevention curtain 500 corresponds to the X-ray leakage prevention means, and the pair of guide members is the guide guide 700. 720, the plurality of rotary plates 501a, 501b, 502a, 502b correspond to X-ray leakage prevention members having a plurality of different widths in the width direction of the transport means, and the direction of the arrow X1 corresponds to the transport direction. .

  A preferred embodiment of the present invention is as described above, but the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

100 X-ray inspection apparatus 200 X-ray irradiation apparatus 220 Line sensor 300 X-ray inspection room 500 X-ray leakage prevention curtain 501a, 502a, 503a, 504a Rotating plate having one width 501b, 502b, 503b, 504b Other width Rotating plate 510 X-ray leakage prevention curtain on the entrance side 520 X-ray leakage prevention curtain on the exit side 511, 521 Base 512, 513, 522, 523 Horizontal shaft 524, 525 Member 551, 552 Shield plate 700, 710, 720 Guide guide 800 Belt conveyor 900 products

Claims (5)

An X-ray inspection apparatus that inspects an object to be inspected with transmitted X-rays irradiated from an X-ray source,
Transport means for transporting the inspection object;
A pair of guide members provided in the conveying means for guiding the inspection object;
X-ray leakage prevention means disposed between the pair of guide members on the conveyance upstream side and conveyance downstream side of the conveyance means,
The X-ray leakage prevention means is
An X-ray inspection apparatus comprising X-ray leakage preventing members having a plurality of different widths in the width direction of the conveying means.   The X-ray inspection apparatus according to claim 1, wherein the object to be inspected is a pre-packaging product composed of a plurality of identical items.   The X-ray leakage prevention means includes one or more wide X-ray leakage prevention members disposed in the vicinity of the guide member, and one or more narrow X-rays between the wide X-ray leakage prevention members. The X-ray inspection apparatus according to claim 1, wherein a line leakage prevention member is provided.   The X-ray leakage prevention means includes one X-ray leakage prevention member having one width and a width 1.3 to 1.5 times that of the one X-ray leakage prevention member having the one width. The X-ray inspection apparatus according to claim 1, further comprising an X-ray leakage prevention member. The pair of guide members have a guide member moving mechanism that moves in a horizontal direction from a transfer surface of the transfer means,
5. The X-ray leakage prevention member according to claim 1, wherein the X-ray leakage prevention member includes an X-ray leakage prevention member moving mechanism that moves in a horizontal direction from a conveyance surface of the conveyance unit. Line inspection device.