JP2018028505A - X ray inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray inspection device capable of dealing with an increase of speed by preventing an X-ray from leaking to the outside, while implementing miniaturization of the device.SOLUTION: A first defect product discharge device 34, an X-ray inspection device main body 35, and a second defect product discharge device 36 are arranged along a conveyance line. Both defect product discharge devices inject a compressed air to a package of the defect product conveyed on the conveyance line so as to be discharged. The defect product discharge device includes an X-ray shielding box 60 formed by surrounding wall plates 65 and 75 having an X-ray shielding function. The wall plate has a hole part 66 and includes covering parts 67, 77 for covering the hole part on the outside of the wall plate. The covering part is concealed by overlapping the hole part when viewing the wall plate directly from outside, and includes an opened portion between at least a partial zone of the peripheral edge of the covering part and the wall plate, and the injected compressed air is ejected outside of the X-ray shielding box from the opened portion via the hole part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an X-ray inspection apparatus, for example, an inspection apparatus that is installed on the downstream side of a packaging machine and inspects a manufactured package.

  For example, an article to be packaged or the like may bite into the seal portion of the package, and it is necessary to exclude a product with a poor seal as a defective product. Therefore, when an inspection device main body that detects the presence or absence of such biting and a defective product discharge device are provided in the conveyance line on the downstream side of the packaging machine, and a defective product such as biting that passes through the inspection device main body is detected Activating the defective product discharge device to eliminate defective products from the transfer line of non-defective products. In the case of a package manufactured using a non-transparent packaging film such as an aluminum vapor deposition film, an X-ray inspection apparatus (including a soft X-ray inspection apparatus) disclosed in, for example, Patent Document 1 is used as an inspection apparatus body. Use.

  In addition, the defective product discharge device is provided with, for example, a pusher that reciprocates on the transport line in a direction intersecting the transport direction, and when the defective product is transported, the pusher moves across the transport line. The defective product is pushed out and transferred to a defective product discharge conveyor arranged beside the conveyance line.

JP 2005-91015 A

  For example, there is a demand for speeding up the packaging system and increasing the number of products manufactured per minute. In order to satisfy such a requirement, when the operating speed of the packaging machine is increased, the moving speed of the package that finally passes through the defective product discharging apparatus is also increased. Then, the conventional defective product discharging apparatus that moves the pusher or the like cannot cope with it, and there is a problem that the speed of the packaging system is limited due to the processing capability of the defective product discharging apparatus.

  Therefore, in order to solve the problem, the present inventor has considered to apply an air jet system capable of increasing the processing capacity as compared with the pusher system as a defective product discharging apparatus. In the air jet system, compressed air is blown from one side edge of the transport line to the other side edge of defective products moving on the transport line, and the defective products are blown off from the transport line and discharged. To do. However, in the case of such an air jet system, a path through which the compressed air blown out escapes is necessary. On the other hand, in the X-ray inspection apparatus, it is necessary to surround the periphery of the X-ray inspection apparatus with a member that shields the X-ray so that the irradiated X-ray does not leak outside.

  For this reason, if the injected compressed air stays in the closed space surrounded by the shielding member, a path through which the compressed air escapes cannot be secured, and defective products cannot be blown away. In addition, if a hole is formed in the shielding member, a route through which the compressed air escapes can be secured. However, if a defective product discharging apparatus is disposed at a relatively close position, for example, immediately after the X-ray inspection apparatus, the X is removed from the hole. Such a countermeasure cannot be taken because the line leaks.

  Therefore, in order to cope with the increase in speed, for example, the entire length of the X-ray inspection apparatus is lengthened so that the X-rays do not leak out, and an air jet type defective product discharge apparatus is arranged downstream thereof, A new problem arises that the entire broadcasting system becomes larger.

  In order to solve the above-described problems, an X-ray inspection apparatus according to the present invention includes: (1) an X-ray inspection apparatus main body that inspects a package conveyed by a conveyance line by irradiating X-rays; A defective product discharging device that is disposed downstream of the inspection device main body and discharges a defective package detected by the X-ray inspection device main body, and the defective product discharging device is conveyed on the conveying line. X-ray shielding box formed by surrounding the defective product discharge device with a wall plate having an X-ray shielding function. The wall plate has a hole portion, and a cover portion that covers the hole portion is provided outside the wall plate, and the cover portion has the hole when the wall plate is viewed from the outside. At least part of the peripheral edge of the cover and the cover It has an open portion between the plate was configured so that the injection was air is discharged from the open portion through the hole to the outside of the X-ray shielding box. The defective product discharge device corresponds to the second defective product discharge device 36 in the embodiment.

  In this way, since the opening of the hole provided in the wall plate of the X-ray shielding box is closed by the cover when viewed from the wall plate, X-rays are not covered by the wall plate or the cover. It can be shielded by the part and can be prevented from leaking outside. Therefore, the X-ray inspection apparatus of the present invention exhibits an X-ray shielding effect. Furthermore, the air injected with respect to the defective package passes through the X-ray shielding box, and is discharged to the outside through the hole. Thus, since the air passage is ensured, defective products due to air can be discharged, and for example, it is possible to cope with higher speed.

  (2) An upstream defective product discharge device is provided upstream of the X-ray inspection apparatus main body to discharge a defective defective package, and the upstream defective product discharge device is transported on the transport line. X is formed by injecting air to the package of defective products having an external appearance to be discharged from the transport line, and surrounding the defective product discharge device with a wall plate having an X-ray shielding function. A wire shielding box is provided, the wall plate has a hole portion, and a cover portion that covers the hole portion is provided outside the wall plate, and the cover portion is viewed from the outside facing the wall plate. So as to overlap and conceal the hole, and has an open part between at least a part of the peripheral edge of the cover part and the wall plate, and the injected air passes through the hole and the open part. It is good to comprise so that it may discharge | emit from the said X-ray shielding box. The upstream defective product discharge device corresponds to the first defective product discharge device 54 in the embodiment.

  In this way, the upstream defective product discharge apparatus can also perform X-ray shielding and discharge defective products by the air jet method. Furthermore, by arranging the X-ray shielding box on the upstream side of the X-ray inspection apparatus main body, for example, the distance between the X-ray generation source in the X-ray inspection apparatus main body and the carry-in portion of the X-ray inspection apparatus main body is reduced. Even if X-rays leak from the main body of the X-ray inspection apparatus to the upstream side, the X-ray shielding box provided in the upstream defective product discharge device prevents the X-rays from leaking outside the apparatus. it can. Therefore, the overall length of the entire apparatus can be shortened.

  (3) It is preferable that the wall plate is arranged upright, and the open portion provided in the wall plate arranged upright is formed between a peripheral edge located below the cover portion. This is preferable because air used for discharging defective products blows out downward.

  (4) The wall plate is disposed on the top surface, and the open portion provided on the wall plate disposed on the top surface is formed in a section located on the opposite side of the transport line at the periphery of the cover portion. It is good to be done.

  (5) The X-ray inspection apparatus main body has an X-ray irradiation apparatus and a line sensor arranged vertically opposite to each other across the transport line, and surrounds the X-ray irradiation apparatus with a casing having an X-ray shielding function. An opening for passing X-rays emitted from the X-ray irradiation device is provided on a surface of the housing facing the transport line, and the upstream side in the transport direction of the package with the line sensor interposed therebetween. An X-ray shielding sheet is disposed on each downstream side, an X-ray irradiating device, the line sensor, the housing, an X-ray shielding outer case surrounding the X-ray shielding sheet is disposed, and the conveyance line is the X-ray It is good to arrange | position so that the carrying-in opening part and carrying-out opening part which were provided in the shielding outer case may be penetrated. In this way, by providing a housing, the amount of X-rays radiated toward the package for inspection is suppressed, and the suppressed X-rays are placed in the line sensor installation area as much as possible. The X-ray shielding outer case can be kept small, and the apparatus can be made compact.

  (6) The transport line in the X-ray inspection apparatus main body includes two endless belts spaced apart from each other on the left and right sides so that the package is transported on the two endless belts, For the two endless belts, the X-ray irradiation units for performing X-ray inspection may be arranged so as to be shifted forward and backward in the transport direction. In this way, the distance between the two end levels that are separated from each other can be used, the distance by which the X-ray irradiation unit is shifted back and forth can be shortened, and the entire apparatus can be compactly accommodated.

  According to the present invention, it is possible to cope with a higher speed by reducing the size of the apparatus and preventing X-rays (including soft X-rays) from leaking outside.

(A) is a top view which shows an example of a to-be-packaged object, (b) is the front view, (c) is a top view which shows an example of a package. It is a front view which shows an example of the packaging machine main body of the horizontal pillow packaging machine arrange | positioned in the upstream of the X-ray inspection apparatus which concerns on this invention. FIG. It is the perspective view which abbreviate | omitted illustration of the center box parts 61 and 71 which shows suitable one Embodiment of the X-ray inspection apparatus which concerns on this invention. It is the front view. FIG. It is the left view. It is the right view. FIG. It is CC sectional view taken on the line in FIG. It is DD sectional view taken on the line in FIG. It is a figure which expands and shows a part of 1st X-ray shielding box.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not construed as being limited thereto, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

  The X-ray inspection apparatus 30 of the present embodiment is disposed on the downstream side of the horizontal pillow packaging machine, inspects the non-defective product / defective product with respect to the package 7 manufactured by the horizontal pillow packaging machine, and discards the defective product. It has a function to do.

  FIG. 1 shows an example of a package 7 and an article 1 to be packaged that are processing targets of the X-ray inspection apparatus of the present embodiment and a horizontal pillow packaging machine arranged upstream thereof. In the present embodiment, the packaged item 1 is a drip bag that allows a user to easily enjoy a full-fledged drip flavor, and includes a hook-type support member. That is, as shown in FIG. 1A, the package 1 includes a bag body 3 filled with coffee powder 2 and a hook member 4 attached to the side surface of the bag body 3. The bag 3 is made of non-woven fabric, filled with coffee powder 2 in a state where one side (the upper part in use, the left side in FIG. 2) is opened, and in that state, the one side part is heat-sealed or the like. A seal portion 3a is formed and sealed. Further, an opening perforation 5 is formed at an unsealed portion along the seal portion 3a. Further, when the coffee powder 2 is filled in the bag body 3, the coffee powder 2 is supplied into the bag body 3 from the opening portion with one side to be opened up. Therefore, the coffee powder 2 is filled relatively densely in the posture at the time of supply, that is, the bottom 3b side of the bag body 3 in use. As a result, as shown in FIG. 1B, the bottom 3b side is relatively thick, has a certain degree of hardness, and is relatively difficult to be crushed. On the other hand, the thickness of the bag 3 on the side of the perforation 5 is reduced and the coffee powder 2 is also present in a relatively sparse state, and is easily crushed and deformed when an urging force is applied from the outside. At the time of use, the bag body is opened by cutting the perforation 5 prior to the drip, and the hook member 4 is used to set the bag body. In this way, the overall shape of the article 1 to be packaged is a flat shape with a rectangular plane.

  As shown in FIG. 1 (c), the packaged article 1 is hermetically stored in a flat outer bag 6 to produce a package 7. The outer bag 6 is formed from a packaging film such as an aluminum vapor deposition film, and one side of the rectangular shape is folded, and the remaining three sides are sealed (side seal portion 6a, top seal portion 6b) to be sealed.

  This type of drip bag has been conventionally packaged using a three-sided seal package, but has been manufactured using a vertical pillow packaging machine. However, the vertical pillow packaging machine has a problem that the number of manufactured units per unit time cannot be increased too much. Therefore, the packaging process for the drip bag is performed using a horizontal pillow packaging machine that can cope with an increase in processing speed instead of the vertical pillow packaging machine. And in this embodiment, in order to manufacture the package body of the same dimension shape as the package body manufactured with the conventional vertical pillow packaging machine, in this embodiment, the cut dimension in the horizontal pillow packaging machine, that is, the length t1 of the outer bag 6 In addition, there is not much difference in the length t2 of the article to be packaged 1 (drip bag), and considering the top seal portion 6b, there is no room for dimensions in the front-rear direction and the conveyance direction during the packaging process. As a result, there is a high possibility that the package 1 will be bitten by the side seal portion 6a and the top seal portion 6b.

  2 and 3 show a part of the packaging machine body 10 of the horizontal pillow packaging machine. On the upstream side of the packaging machine main body 10, a film supply device that continuously supplies a belt-shaped packaging film (band-like film 8) to the packaging machine main body 10, and the object to be packaged 1 to the packaging machine main body 10 are predetermined. It is provided with a packaged article conveying and supplying apparatus that supplies the objects at intervals. The film supply device supplies a belt-like film 8 such as an aluminum vapor deposition film to the bag making device 9 of the packaging machine body 10. The packaged article conveying and feeding apparatus conveys the above-described packaged articles 1 in two horizontal rows, and simultaneously supplies the two packaged articles 1 arranged side by side to the packaging machine body 10 at the next stage. To do.

  The packaging machine main body 10 includes a bag making device 9 that sets the strip-shaped film 8 supplied upstream thereof into a cylindrical shape. By passing through the bag making device 9, the belt-like film 8 is lifted so that both side ends are curved upward along the bag making device, and is produced in a cylindrical shape. At this time, both side edges 8a of the belt-like film 8 are set so as to be close to each other in a non-contact manner while being positioned on the upper center side (see FIG. 3). That is, in the case of a normal pillow packaging machine, both side edges of the strip-shaped film 8 formed into a cylindrical shape overlap each other with sealable surfaces. In the present embodiment, both side edges 8a are respectively cylindrical. It is made to oppose the center site | part of the strip | belt-shaped film 8 bag-formed in the shape. Further, the packaged article conveyance supply device sequentially supplies the packaged articles 1 conveyed in two rows to the bag making device 9. Thereby, the both-sides end where the strip | belt-shaped film 8 was turned | folded comes to cover the upper direction of each to-be-packaged object 1, respectively.

  On the downstream side of the bag making device 9, a conveyance path 12 that constitutes a conveyance surface of the cylindrical film 11 that encloses the article 1 to be packaged is disposed. A pinch roller 13, a side seal device 14, and a vertical cutter device 15 are arranged from the upstream side at an appropriate position in the center of the conveyance path 12. The pinch roller 13 is composed of a pair of upper and lower rollers, and sandwiches the both side edges 8a of the strip-shaped film 8 formed in a cylindrical shape and the central portion of the strip-shaped film 8 facing it with a predetermined pressure from above and below to form a cylindrical shape. A conveying force is applied to the band-shaped film 8 that has been formed.

  The side seal device 14 is located on the upper side of the strip-shaped film 8 formed in a cylindrical shape, and is provided on the lower side of the strip-shaped film 8 formed in a cylindrical shape and a single side sealer 14a having a large diameter disk shape. And is composed of two small-sized disc-shaped holding rollers 14b (arranged in the front-rear direction). The side sealers 14a and the restraining rollers 14b arranged on the upper and lower sides sandwich the side edges 8a of the strip-shaped film 8 formed in a cylindrical shape and the central portion of the strip-shaped film 8 facing it with a predetermined pressure from above and below. At the same time, it is heated at a predetermined temperature. Thereby, the both side edge 8a is heat-sealed to the film part which each opposes, and the said sealed part turns into the side seal part 6a. The height position at which the film is sandwiched between the side sealer 14a and the holding roller 14b is higher than the transport path 12 and is about half the thickness of the package 1. Thereby, the side seal part 6a is formed at an intermediate position in the height direction of the tubular film 11. Further, the side edges 8a are respectively sealed by the side seal portion 6a, whereby two cylindrical films 11 connected to the left and right are formed from the strip-shaped film 8 that is packed into one large cylindrical shape. become. And the to-be-packaged object 1 is included in these two cylindrical films 11, respectively.

  The vertical cutter device 15 cuts the central portion of the side seal portion 6a, that is, between the two tubular films 11 connected to the left and right, and a slit cutter 15a located on the upper side of the tubular film 11, It is comprised from the receiving blade 15b located in the downward side of the cylindrical film 11. FIG. The side seal portion 6a is sandwiched from above and below with a predetermined pressure by the slit cutter 15a and the receiving blade 15b arranged vertically. Thereby, the side seal part 6a is cut along the traveling direction of the film, and the left and right tubular films 11 are separated. The left and right tubular films 11 move forward on the conveyance path 12 in a separated state. Along with this movement, the side seal portion 6a hangs downward and comes into contact with the conveyance path 22.

  On the downstream side of the vertical cutter device 15, while supporting the separated two tubular films 11, a belt conveyor 16 to be transported, and an article restraining belt device 18 is disposed above the belt conveyor 16, and A top seal device 17 and a carry-out conveyor 19 are disposed on the downstream side thereof.

  The to-be-packaged material restraining belt device 18 is disposed in the immediate vicinity of the top seal device 17 on the upstream side, suppresses the to-be-packaged material 1 in the tubular film 11 from being lifted upward, and is conveyed while maintaining a horizontal state. I can do it. The packaged article restraining belt device 18 has a basic configuration in which an endless belt 18b is looped over pulleys 18a arranged at the front and rear. Then, two sets of pulleys 18a and endless belts 18b are provided so that the left and right tubular films 11 are independently restrained from above. The left and right endless belts 18b are inclined at a predetermined angle with respect to the transport direction of the tubular film 11, and are arranged so that the downstream side faces outward. As a result, the left and right endless belts 18b are spaced apart from each other toward the downstream side, and are arranged in a reverse C shape along the conveying direction in a plan view.

  On the other hand, as described above, the belt conveyor 16 is arranged in parallel with the transport direction. As a result, the object 1 to be packaged conveyed on the belt conveyor 16 has its lower surface in contact with the belt conveyor 16 and is urged in a direction parallel to the conveying direction. 18 is parallel to the rotational movement direction of the endless belt 16b and is biased toward the front diagonally outer side (the left edge of the left tubular film) with respect to the transport direction. Thereby, the film site | part of the upper surface side of the bag body 3 which comprises the to-be-packaged object 1 is pulled by the outer side of a conveyance direction. Then, the side seal part 6a is pulled upward, the side seal part 6a returns to a half position in the thickness direction of the article 1 to be horizontal, becomes a target posture in the vertical direction, and in the posture, the next stage To the top seal device 17.

  Although not shown, the same drive source as the belt conveyor 16 is used as the drive source of the article holding belt device 18. That is, the output of the servo motor and other drive motors is transmitted to the packaged article restraining belt device 18 and the belt conveyor 16 by a power transmission mechanism including a power transmission belt (chain). Thereby, the to-be-packaged article restraining belt device 18 and the belt conveyor 16 can be easily rotated and moved at a constant speed, and the cylindrical film 11 can be stably conveyed while being sandwiched from above and below.

  The top seal device 17 seals and cuts the tubular film 11 in a direction orthogonal to the traveling direction, that is, in a transverse direction. The film part to be sealed / cut is a predetermined position between the front and back objects 1 and the top seal portion 6b is formed at the part. Thereby, the top part of the cylindrical film 11 is isolate | separated from the subsequent by passing the top seal apparatus 17, and the package body 7 is manufactured. The manufactured package 7 is carried out by the carry-out conveyor 19 and given to the X-ray inspection apparatus 30 at the next stage. In addition, since the left and right tubular films 11 are supplied to the top seal device 17, two packaging bodies 7 are manufactured. As described above, the horizontal pillow packaging machine manufactures two packaging bodies 7 at a time, and the processing speed can be further increased.

  And since the side seal | sticker part 6a of the to-be-packaged object 1 is horizontal by the to-be-packaged article restraining belt apparatus 18, and a cylindrical film has become a form which is object in the upper and lower sides, it can seal neatly and the top seal part 6b is also A beautiful top seal portion 6b can be formed without undulation or formation of wrinkles.

  Next, the X-ray inspection apparatus 30 according to the present invention will be described. As described above, the packaging machine body 10 simultaneously manufactures two packaging bodies 7 and sequentially carries them out in two rows. Therefore, the X-ray inspection apparatus 30 includes two X-ray irradiation apparatuses in order to inspect the two packaging bodies 7. Since the amount of X-rays generated by the X-ray inspection apparatus 30 is doubled when simply calculated as compared with the apparatus having one X-ray irradiation apparatus, it is necessary to take further measures for preventing X-ray leakage. In addition, a large space is required for arranging two X-ray irradiation apparatuses. In particular, since the packaging machine body 10 is carried out in a state in which the two packaging bodies are close to the left and right, the two X-ray irradiation apparatuses need to be arranged apart from each other in the front and back, and there is a problem that the apparatus becomes large. is there.

  As shown in FIG. 4 and subsequent figures, the transport line of the package 7 in the X-ray inspection apparatus 30 is disposed on the first belt conveyor device 31 disposed on the carry-in side and on the downstream side of the first belt conveyor device 31. A second belt conveyor device 32 and a third belt conveyor device 33 disposed on the downstream side of the second belt conveyor device 32 are provided (see FIG. 10 and the like). The first belt conveyor device 31 is arranged on the downstream side of the carry-out conveyor 19, receives the package 7 carried out in two horizontal rows from the carry-out conveyor 19, and carries it into the X-ray inspection device 30. The first belt conveyor device 31 includes an endless belt 31a having a wide belt width capable of receiving two packaging bodies 7 on the side, and is sequentially transported in two rows from the packaging machine body 10 side. The package 7 is conveyed as it is. The endless belt 31a is formed with a large number of through holes 31b at a portion for receiving the package 7, and is conveyed by sucking and holding the package 7 on the endless belt 31a by suction means (not shown). Thereby, even if the package 7 is flat and lightweight, it is conveyed in a stable posture without being displaced on the endless belt 31a.

  The second belt conveyor device 32 includes two endless belts 32a and 32b arranged on the left and right. The endless belts 32a, 32a arranged on the left and right sides are inclined at a predetermined angle with respect to the conveying direction of the package 7, and arranged so that the downstream side faces outward. Accordingly, the distance between the left and right endless belts 32a increases toward the downstream side, and the left and right endless belts 32a are arranged in a reverse C shape along the transport direction in the plan view shown in FIG. The two packaging bodies 7 that are transported in two horizontal rows and are transported side by side from the first belt conveyor device 31 are transferred to the left and right endless belts 32a and 32a, respectively. , 32a. Thereby, the space | interval of both gradually separates the two package bodies 7 located in a line, moving forward.

  The third belt conveyor device 33 includes two endless belts 33a and 33a arranged on the left and right. The endless belts 33a, 33a arranged on the left and right sides are arranged in parallel at a predetermined interval, and the upstream end thereof is close to the downstream end of each endless belt 32a of the second belt conveyor device 32. . Thereby, the packaging body 7 which reached the downstream end of the endless belt 32a of the second belt conveyor device 32 is transferred to the endless belt 33a of the third belt conveyor device 33, and is conveyed along with the rotation of the endless belt 33a. .

  Further, the X-ray inspection apparatus 30 includes a first defective product discharge device 34, an X-ray inspection device main body 35, and a second defective product discharge device 36 along the transfer line / transport path. In terms of the relationship with each belt conveyor device constituting the conveyance line, the first defective product discharge device 34 is disposed within the conveyance range of the second belt conveyor device 32, and X is within the conveyance range of the third belt conveyor device 33. A line inspection apparatus main body 35 and a second defective product discharge apparatus 36 are arranged.

  Further, detection sensors 37 are arranged in the vicinity of the carry-out ends on the left and right sides of the first belt conveyor device 31. The detection sensor 37 is a sensor that detects the presence or absence of the package 7 on the first belt conveyor device 31. Based on the output of the detection sensor 37, a control device (not shown) controls the operations of the first belt conveyor device 31, the second belt conveyor device 32, the third belt conveyor device 33, etc. And is sent to the X-ray inspection apparatus main body 35 installed on the downstream side.

  Furthermore, a cover member 38 that opens and closes so as to cover a partial region on the carry-out end side of the first belt conveyor device 31 and a partial region on the carry-in end side of the second belt conveyor device 32 is arranged. The detection sensor 37 is disposed in a space covered with the cover member 38.

  The first defective product discharge device 34 is a device that discharges an empty bag without the package 1, a printing error, and other defective products in appearance detected by a defective product inspection device provided on the packaging machine body 10 side. is there. The first defective product discharge device 34 is an air jet type discharge device. The air injection nozzle 40 is disposed between the left and right endless belts 32 a of the second belt conveyor device 32. The air injection nozzle 40 is connected to a device (air cylinder, pump, open / close valve, etc.) that supplies compressed air (not shown), and injects compressed air from the air injection nozzle 40.

  The air injection nozzle 40 blows compressed air from one side edge of the endless belt 32a toward the other side edge. With this compressed air, the packaging body 7 on the endless belt 32a is blown off, and is discharged out of the endless belt 32a. One air injection nozzle 40 is arranged for each of the left and right endless belts 32a, 32a. Thereby, discharge processing can be individually performed on the packaging body 7 transported on the left and right endless belts 32a and 32a. That is, for example, when one of the two packaging bodies 7 conveyed side by side is a defective product, the compressed air is injected from the air injection nozzle 40 on the endless belt 32a side that conveys the defective product. Thereby, only the said inferior goods can be excluded and the non-defective package 7 can be conveyed as it is. Further, in this embodiment, the detection process for defective products discarded by the first defective product discharge device 34 is performed by a defective product inspection device provided on the packaging machine body 10 side. Therefore, in general, the defective product discharge processing is often performed in the packaging machine body 10 downstream of the defective product inspection apparatus. For example, as in the carry-out conveyor 19, two packaging bodies 7 are provided on one endless belt. Is transported in a state of approaching sideways, the air injection nozzle cannot be disposed between the left and right packaging bodies 7, and individual defective products cannot be discarded by the air jet method. Therefore, in the present embodiment, the left and right endless belts 32a and 32a are provided, and the first defective product discharge device 34 is provided in the arrangement region of the second belt conveyor device 32 that further increases the distance as it goes to the downstream side in a reverse letter C. , Only defective products can be discarded.

  The X-ray inspection apparatus main body 35, for example, irradiates the package 7 with soft X-rays, detects the strength and detects foreign matter (metal pieces, glass pieces, stone pieces, etc.) in the package 7, It detects the biting into the seal part of the package 1. The X-ray inspection apparatus main body 35 includes a first X-ray inspection unit 41 and a second X-ray inspection unit 42 disposed on the left and right endless belts 32a and 32a of the second belt conveyor device 32, respectively. The first X-ray inspection unit 41 is disposed on the endless belt 32a on the right side (front side of the apparatus) in the transport direction, and the second X-ray inspection unit 42 is on the endless belt 32a on the left side (back side of the apparatus) in the transport direction. Arranged.

  The first X-ray inspection unit 41 and the second X-ray inspection unit 42 basically have the same configuration, and are shifted in the front-rear direction with respect to the transport direction. There is a predetermined distance between the left and right endless belts 32a, 32a, but there is not enough space to place the first X-ray inspection unit 41 and the second X-ray inspection unit 42 side by side at the same position in the transport direction. . In order to secure a space that can be lined up side by side, if the length in the transport direction of the second belt conveyor device 32 of the present embodiment is the same, it is necessary to increase the inclination angle of the endless belt 31a, and smooth transport If the inclination angle of the endless belt 31a is the same, it is necessary to increase the length in the transport direction, which leads to an increase in the size of the apparatus. Therefore, in the present embodiment, the first X-ray inspection unit 41 and the second X-ray inspection unit 42 are slightly shifted back and forth along the transport direction. In the present embodiment, the left and right endless belts 32a, 32a are in a state of being separated by a predetermined distance, but the region where the first X-ray inspection unit 41 and the second X-ray inspection unit 42 are installed is If it is in the close state like the side-by-side package 7 conveyed on the first belt conveyor device 31, it needs to be largely shifted in the front-rear direction, and compared with the distance shifted in the front-rear direction, the shift of this embodiment The amount is small, and the X-ray inspection apparatus main body 35 can be downsized in view of the above points.

  As shown in FIG. 11 and the like, the first X-ray inspection unit 41 includes a first X-ray irradiation device 41a disposed below the endless belt 32a, a first line sensor 41b disposed above the endless belt 32a, A determination processing unit (not shown) is provided for determining the presence or absence of defective products such as foreign matter based on the output signal of the first line sensor 41b. The first X-ray irradiation device 41a and the first line sensor 41b are disposed to face each other with the endless belt 32a interposed therebetween. The first X-ray irradiation device 41a emits soft X-rays upward. The emitted soft X-rays pass through the package 7 conveyed by the endless belt 32a, and the transmission level of the transmitted soft X-rays is measured by the first line sensor 41b. The signal processing unit analyzes the signal measured by the first line sensor 41b, and detects a defective product such as a foreign matter or a bite of the article 1 to be packaged. When the signal processing unit detects a defective product, the signal processing unit outputs a detection signal, and the detection signal is transmitted to the second defective product discharge device 36 at the subsequent stage. The package 7 that has passed through the first X-ray inspection unit 41 is conveyed by the endless belt 33a of the third belt conveyor device 33 and reaches the second defective product discharge device 36 at the next stage.

  The second X-ray inspection unit 42 includes a second X-ray irradiation device 42a disposed below the endless belt 32a, a second line sensor 42b disposed above the endless belt 32a, and an output signal of the second line sensor 42b. Is provided with a determination processing unit (not shown) for determining the presence or absence of defective products such as foreign matters. The second X-ray irradiation device 42a and the second line sensor 42b are disposed to face each other across the endless belt 32a. The second X-ray irradiation device 42a emits soft X-rays upward. The emitted soft X-rays pass through the package 7 conveyed by the endless belt 32a, and the transmission level of the transmitted soft X-rays is measured by the second line sensor 42b. The signal processing unit analyzes the signal measured by the second line sensor 42b, and detects a defective product such as a foreign object or a bite of the article 1 to be packaged. When the signal processing unit detects a defective product, the signal processing unit outputs a detection signal, and the detection signal is transmitted to the second defective product discharge device 36 at the subsequent stage. The package 7 that has passed through the second X-ray inspection unit 42 is conveyed by the endless belt 32a of the third belt conveyor device 33 and reaches the second defective product discharge device 36 at the next stage.

  The second defective product discharge device 36 is a device that discharges defective products detected by the signal processing unit of the X-ray inspection unit provided in the X-ray inspection apparatus main body 35, such as foreign matter mixing and biting. The second defective product discharge device 36 is an air jet type discharge device. An air injection nozzle 45 is disposed between the left and right endless belts 33 a of the third belt conveyor device 33. The air injection nozzle 45 is connected to a device (air cylinder, pump, open / close valve, etc.) that supplies compressed air (not shown), and injects compressed air from the air injection nozzle 45.

  When a defective product detected by the first X-ray inspection unit 41 or the second X-ray inspection unit 42 reaches the discharge area, the corresponding air injection nozzle 45 is connected to one side of the endless belt 33a. Compressed air is blown from the edge toward the other side edge. With this compressed air, the packaging body 7 (defective product) on the endless belt 33a is blown off, and is discharged out of the endless belt 33a. One air ejection nozzle 45 is arranged for each of the left and right endless belts 33a, 33a. Thereby, discharge processing can be performed individually for each of the packaging bodies 7 transported on the left and right endless belts 33a and 33a.

  Since the soft X-rays radiated from the first X-ray irradiation device 41a and the second X-ray irradiation device 42a travel to the surroundings other than the opposed first line sensor 41b and second line sensor 42b, the X-ray inspection device 30 It is necessary to take measures against X-ray leakage so as not to leak to the outside. The X-ray leakage countermeasure in this embodiment is as follows.

  The X-ray inspection apparatus body 35 surrounds the first X-ray irradiation apparatus 41a and the second X-ray irradiation apparatus 42a with a small stainless steel casing 50, respectively. The housing 50 is provided with an opening only on the upper surface, and soft X-rays are emitted from the opening to the outside of the housing 50. The size and shape of the opening are made as small as possible so that the minimum amount of soft X-rays required to inspect the package 7 is emitted. By doing in this way, the quantity of the X-ray which leaks out from the 1st X-ray irradiation apparatus 41a and the 2nd X-ray irradiation apparatus 42a can be suppressed. In addition, in FIG. 11, the housing | casing 50 surrounding the 1st X-ray irradiation apparatus 41a is not shown from the cross-sectional relationship.

  The X-ray shielding sheet 51 covers the front and rear of the first line sensor 41b and the second line sensor 42b in the transport direction. The X-ray shielding sheet 51 is made of a sheet material containing tungsten, for example. The X-ray shielding sheet 51 is configured to cover the first line sensor 41b and the second line sensor 42b together. The X-ray shielding sheet 51 is also disposed above the space between the left and right endless belts 33a, 33a. Furthermore, the lower end of the X-ray shielding sheet 51 is positioned below the lower ends of the first line sensor 41b and the second line sensor 42b. If it does in this way, most of soft X-rays which permeate | transmitted the endless belt 32a and the package body 7 will approach into the space pinched | interposed by the front and back X-ray shielding sheets 51, and the one part is 1st line sensor 41b, 2nd. It is used for measurement by the line sensor 42b.

  Furthermore, the lower end position of the X-ray shielding sheet 51 is preferably as low as possible at a position where it does not contact the packaging body 7. If it does in this way, it can shield effectively that soft X-ray which permeate | transmitted the endless belt 32a and the package 7 and advanced upwards advances to the front-back direction along a conveyance direction.

  Soft X-rays radiated from the first X-ray irradiation device 41a and the second X-ray irradiation device 42a can be shielded by the casing 50 and the X-ray shielding sheet 51 described above, but for example, above the conveyance surface of the endless belt 32a. Since the certain space is opened in order to secure the conveyance space for the package 7, it is difficult to shield all the soft X-rays. Therefore, in this embodiment, an X-ray shielding outer case 56 that covers the entire space including the first X-ray inspection unit 41 or the second X-ray inspection unit 42 is disposed. The X-ray shielding outer case 56 covers a region surrounding a part on the downstream end side of the second belt conveyor device 32 and about half of the upstream side of the third belt conveyor device 33.

  The X-ray shielding outer case 56 is formed by arranging plate materials having an X-ray shielding function such as a stainless steel plate on six surfaces, and covers almost the entire surface. The right side (front side of the apparatus) of the X-ray shielding outer case 56 in the transport direction of the package 7 includes an opening / closing door 56a. A carry-in opening is formed in the side wall 56b of the X-ray shielding outer case 56 on the upstream side in the transport direction of the package 7. A distal end portion on the downstream side of the second belt conveyor device 32 is disposed so as to penetrate the inside of the carry-in opening. The package 7 conveyed on the second belt conveyor device 32 passes through the carry-in opening and enters the X-ray shielding outer case 56. The carry-in opening preferably has a small opening area, is close to the lower surface and the left and right sides of the endless belts 32a and 32a, and the upper side of the transport surface of the endless belts 32a and 32a has a predetermined margin in the thickness of the package 7. It is set as an open dimensional shape by the length obtained by adding. If it does in this way, the package 7 which conveys on the 2nd belt conveyor apparatus 32 will approach into the X-ray shielding outer case 56 from a carrying-in opening part, and will be moved on the 3rd belt conveyor apparatus 33. FIG.

  A carry-out opening is formed in the side wall 56c of the X-ray shielding outer case 56 on the downstream side in the transport direction of the package 7. The third belt conveyor device 33 is inserted and arranged so as to penetrate the inside of the carry-out opening. The packaging body 7 conveyed on the third belt conveyor device 33 passes through the inside of the carry-out opening portion and comes out of the X-ray shielding outer case 56 and enters the second defective product discharge device 36 at the next stage. . As with the carry-in opening, the carry-out opening preferably has a small opening area, is close to the lower surface and the left and right sides of the endless belts 32a and 32a, and above the transport surface of the endless belts 32a and 32a, An open dimension shape corresponding to the length obtained by adding a predetermined margin to the thickness is used. If it does in this way, the packaging body 7 conveyed on the 3rd belt conveyor apparatus 33 will come out of the X-ray shielding outer case 56 from a carrying-out opening part after the test | inspection by X-rays.

  As described above, in the X-ray inspection apparatus main body 35 of this embodiment, the first X-ray irradiation apparatus 41a and the second X-ray irradiation apparatus 42a are covered with the casing 50, and the first line sensor 41b and the second line are covered. By covering the front and back of the sensor 42b with the X-ray shielding sheet 51, the amount of soft X-rays leaking around the first X-ray inspection unit 41 and the second X-ray inspection unit 42 is suppressed, and further, the X-ray shielding outside By enclosing the entirety with the case 56, the X-ray irradiation path becomes difficult to be seen from the outside, and the amount leaking out of the X-ray inspection apparatus main body 35 is further reduced.

  On the other hand, the carry-in opening provided in the side wall 56b and the carry-out opening provided in the side wall 56c are opened as they are without providing a good-shaped shielding member having an X-ray shielding function. This is because the package 7 to be processed of the present embodiment is light and thin. Therefore, when a goodwill-shaped shielding member is provided, if the packaging 7 hits the shielding member, normal conveyance is hindered and desired. This is because there is a possibility that conveyance in the posture / position cannot be performed. As a result, soft X-rays are slightly emitted outside the X-ray shielding outer case 56 from the carry-in opening and the carry-out opening.

  Therefore, in the present embodiment, the first defective product discharge device 34 and the second defective product discharge device 36 are also provided with an X-ray shielding function. Specifically, the first X-ray shielding box 60 is arranged on the first defective product discharging apparatus 34 side. The first X-ray shielding box 60 is provided on the center box portion 61 disposed in the installation area of the second belt conveyor device 32 and on the left and right sides (front side and back side of the device) of the second belt conveyor device 32 in the transport direction. A side box portion 62 is provided.

  The center box portion 61 is configured by arranging flat plates 63 on three surfaces on the upper and lower sides of the second belt conveyor device 32 and on the upstream side in the transport direction of the package 7. The flat plate 63 is made of a plate material having an X-ray shielding function, and for example, a stainless plate is used. The left and right sides in the transport direction are connected to the space of the side box portion 62, and the downstream side in the transport direction is brought into contact with the side wall 56b of the X-ray shielding outer case 56. Further, the flat plate 63 disposed above the second belt conveyor device 32 is provided with an opening 63a at the central portion thereof. A device for supplying compressed air (not shown) disposed outside the first X-ray shielding box 60, and a tube for supplying air to the air injection nozzle 40 so as to penetrate through the opening 63a; The nozzle 40 is connected. Further, a carry-in opening 63b is formed in the flat plate 63 provided on the upstream side (see FIG. 7 and the like). The endless belt 32a of the second belt conveyor device 32 is disposed so as to penetrate through the carry-in opening 63b. As a result, the formation area of the center box portion 61 is shielded from the entire upper and lower sides and the upstream and downstream sides in the transport direction except for the opening 63a and the carry-in opening 63b.

  The side box portion 62 is configured by arranging a wall plate 65 on a surface excluding a connection surface with the center box portion 61. The wall board 65 is comprised with the board | plate material which has an X-ray shielding function, for example, uses a stainless plate. A large number of holes 66 are provided in the wall plate 65 other than the bottom surface. In the present embodiment, the hole portion 66 is formed as an elongated slit-shaped opening, and a plurality of the hole portions 66 are arranged in a state of being aligned vertically and horizontally with respect to the plate surface of each wall plate 65. The elongated hole portions 66 formed in the standing wall plate 65 are formed in an arrangement layout extending in the horizontal direction, and the elongated hole portions 66 formed in the wall plate 65 forming the top surface are arranged along the conveying direction. It is formed with an extended layout.

  A cover 67 is provided on the surface side of each hole 66. The cover 67 overlaps the opening of the hole 66 when facing the wall plate 65 from the outside of the wall plate 65 so that the inside of the side box portion 62 cannot be seen. Further, the cover 67 is connected to the wall plate 65 on one long side of the hole 66 and on both ends in the longitudinal direction, and the other long side of the hole 66 is open. That is, the cover portion 67 has a tapered shape or a curved surface as a whole, and is gradually separated from the wall plate 65 from the portion connected to the wall plate 65 toward the other long side of the hole 66. . One long side of the hole 66 to which the cover 67 is connected is the upper side in the standing wall plate 65 and the center box portion 61 side in the wall plate 65 forming the top surface. Thereby, in the standing wall board 65, the lower part of the cover part 67 becomes an open part 67a, and in the wall board 65 forming the top surface, the outside of the device opposite to the center box part 61 becomes an open part 67a.

  With such a configuration, the compressed air injected from the air injection nozzle 40 proceeds from the center box portion 61 to the space in the side box portion 62, and further passes through the hole portion 66 to the first X-ray from the open portion 67a. It reaches the outside of the shielding box 60. Thus, since the passage of compressed air is secured, compressed air can be injected from air injection nozzle 40, and defective goods can be discharged.

  In addition, since the cover 66 is closed when the hole 66 is viewed from the direction perpendicular to the wall plate 65, the soft X-rays can be shielded by the wall plate 65 and the cover 67 and leak to the outside. Can be prevented.

  In the present embodiment, the second X-ray shielding box 70 is also disposed in the second defective product discharge device 36. The second X-ray shielding box 70 has the same configuration as the first X-ray shielding box 60. That is, the second X-ray shielding box 70 includes a center box portion 71 disposed in the installation area of the third belt conveyor device 33, and both left and right sides in the transport direction of the third belt conveyor device 33 (front side and back side of the device). ) Is provided.

  The center box portion 71 is configured by arranging flat plates 73 on three surfaces on the upper and lower sides of the third belt conveyor device 33 and on the downstream side in the transport direction of the package 7. The flat plate 73 is made of a plate material having an X-ray shielding function, and for example, a stainless plate is used. The left and right sides in the transport direction are connected to the space of the side box portion 72, and the upstream side in the transport direction is brought into contact with the side wall 56 c of the X-ray shielding outer case 56. Further, the flat plate 73 disposed above the third belt conveyor device 33 is provided with an opening 73a at the central portion thereof. A device for supplying compressed air (not shown) disposed outside the second X-ray shielding box 64, and a tube for supplying air to the air injection nozzle 45 so as to penetrate through the opening 73a; The nozzle 45 is connected. Further, a carry-out opening is formed in the flat plate 73 provided on the downstream side. The third belt conveyor device 33 is disposed so as to penetrate the inside of the carry-out opening. Thereby, the formation area of the center box portion 71 is shielded on almost the entire upper and lower sides and the upstream side and the downstream side in the transport direction except for the opening 73a and the carry-out opening.

  The side box portion 72 is configured by arranging a wall plate 75 on a surface excluding a connection surface with the center box portion 71. The wall board 75 is comprised with the board | plate material which has an X-ray shielding function, for example, uses a stainless plate. A number of holes 76 are provided in the wall plate 75 other than the bottom surface. In the present embodiment, a plurality of the holes 76 are formed as elongated slit-shaped openings, and are arranged in a state of being aligned vertically and horizontally with respect to the plate surface of each wall plate 75. The elongated hole portions 76 formed in the standing wall plate 75 are formed in an arrangement layout extending in the horizontal direction, and the elongated hole portions 76 formed in the wall plate 75 forming the top surface are arranged along the conveying direction. It is formed with an extended layout.

  A cover 77 is provided on the surface side of each hole 76. When facing the wall plate 75 from the outside of the wall plate 75, the cover portion 77 overlaps with the opening of the hole 76 so that the inside of the side box portion 72 cannot be seen. Further, the cover 77 is connected to the wall plate 75 on one long side of the hole 76 and on both ends in the longitudinal direction, and the other long side of the hole 76 is open. That is, the cover 77 has a tapered shape, a curved surface, or the like, and is gradually separated from the wall plate 75 from the portion connected to the wall plate 75 toward the other long side of the hole 76. . One long side of the hole portion 76 to which the covering portion 77 is connected is the upper side in the standing wall plate 75 and the center box portion 71 side in the wall plate 75 that forms the top surface. Thereby, in the standing wall board 75, the lower part of the cover part 77 becomes the open part 77a, and in the wall board 75 forming the top surface, the outside of the device opposite to the center box part 71 becomes the open part 77a.

  By adopting such a configuration, the compressed air injected from the air injection nozzle 45 proceeds from the center box portion 71 to the space in the side box portion 72, and further passes through the hole portion 76 to the second X-ray from the open portion 77a. It reaches the outside of the shielding box 64. Thus, since the passage of compressed air is secured, compressed air can be injected from air injection nozzle 45, and defective goods can be discharged.

  Further, since the hole 76 is covered by the cover 77 when viewed from the direction perpendicular to the wall plate 75, the soft X-rays can be shielded by the wall plate 75 and the cover 77 and leak to the outside. Can be prevented.

  On the bottom surfaces of the side box portions 62 and 72, a takeout structure for taking out a defective package is provided. For example, the takeout structure may be provided with a lid / door that opens and closes, closes the lid / door during operation, and opens the lid / door when taking out the defective package. In this way, the soft X-ray can be shielded more reliably. On the other hand, without providing such a member for opening and closing, the entire bottom surface or a part of the bottom surface may be opened, and the defective package may be dropped and discharged from the opening. In this way, the configuration can be simple. The soft X-rays entering the first X-ray shielding box 60 and the second X-ray shielding box 70 have leaked through the carry-in opening and the carry-out opening of the X-ray shielding outer case 56. It reaches the side box parts 62 and 72 via the center box parts 61 and 71. Therefore, even if the bottom surface is open, the possibility that soft X-rays leak out of the opening is low. Furthermore, in the present embodiment, the bottom surface positions of the center box parts 61 and 71 are set at positions farther below the transfer line, that is, the carry-in opening and the carry-out opening of the X-ray shielding outer case 56, Even in view of this point, the possibility that soft X-rays leak out of the opening is low.

  By making the open portions 67a, 77a of the cover portions 67, 77 only on the other long side, the blowing direction of the compressed air can be aligned. And in this embodiment, all the compressed air discharge | released outside from the standing wall board 65 may blow off toward the downward direction. Further, all of the compressed air discharged to the outside from the wall plate 65 provided on the top surface is blown away in a direction away from the endless belts 32a and 32a, and flows smoothly because it is in a direction along the injection direction of the air injection nozzles 40 and 45. So good.

  The hole portions 66 and 76 and the cover portions 67 and 77 formed in the wall plates 65 and 75 are preferable because, for example, a single plate material can be formed by press working or the like, and thus can be easily manufactured.

  In the embodiment described above, the article to be packaged is a coffee drip bag, the hook member 4 is attached to the side surface of the bag body 3, and the hook member 4 is not positioned on the periphery of the bag body 3 in the transported state, and the nonwoven fabric is formed. It is an existing type, and when the peripheral edge is pushed inward, the pushed portion is easily depressed or deformed. However, the present invention is not limited to this, and the packaged item is a drip bag of other types. It may also be an article other than a drip bag.

  Further, in the above-described embodiment, the X-ray inspection is performed on the two packaging bodies 7 carried out in two horizontal rows from the packaging machine main body 10, and defective products are discharged. The present invention is not limited to this, and the present invention may be applied to an inspection or the like for a package that is carried out in a single row or multiple rows.

  In the above-described embodiment, the X-ray inspection apparatus main body 35 checks and inspects soft X-rays. However, the X-ray inspection apparatus body 35 may be inspected by irradiating X-rays other than soft X-rays.

  As described above, various aspects of the present invention have been described using the embodiments and the modifications. However, these embodiments and descriptions are not intended to limit the scope of the present invention, and are for understanding the present invention. It is added that it was provided to contribute. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, and includes combinations of various aspects of the present invention disclosed in the present specification. Among the present inventions, the configuration for which a patent is sought is specified in the appended claims, but the present invention is disclosed in this specification even if the configuration is not specified in the claims. I would like to remind you that there is a possibility of claiming this configuration in the future.

7 Package 30 X-ray Inspection Device 31 First Belt Conveyor Device 32 Second Belt Conveyor Device 33 Third Belt Conveyor Device 34 First Defective Product Discharge Device 35 X-ray Inspection Device Main Body 36 Second Defective Product Discharge Device 40 Air Injection Nozzle 41 1st X-ray inspection unit 41a 1st X-ray irradiation apparatus 41b 1st line sensor 42 2nd X-ray inspection unit 42a 2nd X-ray irradiation apparatus 42b 2nd line sensor 45 Air injection nozzle 50 Case 51 X-ray shielding sheet 54 first defective product discharge device 56 X-ray shielding outer case 60 first X-ray shielding box 64 second X-ray shielding box 65 wall plate 66 hole 67 covering portion 67a open part 70 second X-ray shielding box 75 wall plate 76 Hole 77 Cover 77a Open part

Claims (6)

An X-ray inspection apparatus main body for inspecting the package conveyed by the conveyance line by irradiating X-rays;
A defective product discharging device that is disposed on the downstream side of the X-ray inspection apparatus main body, and discharges a defective package detected by the X-ray inspection apparatus main body,
The defective product discharging apparatus is for discharging air from the transport line by injecting air to the defective product package transported on the transport line,
An X-ray shielding box formed by surrounding the defective product discharge device with a wall plate having an X-ray shielding function;
The wall plate has a hole, and the outer side of the wall plate includes a cover that covers the hole,
The cover portion is concealed by overlapping with the hole portion when the wall plate is viewed from the outside.
There is an open part between at least a part of the peripheral edge of the covering part and the wall plate, and the injected air is discharged from the open part to the outside of the X-ray shielding box through the hole part. An X-ray inspection apparatus characterized by being configured as described above. On the upstream side of the X-ray inspection apparatus main body, an upstream defective product discharge device for discharging a package of defective products in appearance is provided,
The upstream defective product discharge device is for discharging air from the transport line by injecting air to the package of defective external products conveyed on the transport line,
An X-ray shielding box formed by surrounding the defective product discharge device with a wall plate having an X-ray shielding function;
The wall plate has a hole, and the outer side of the wall plate includes a cover that covers the hole,
The cover portion is concealed by overlapping with the hole portion when the wall plate is viewed from the outside.
There is an open part between at least a part of the peripheral edge of the covering part and the wall plate, and the injected air is discharged from the open part to the outside of the X-ray shielding box through the hole part. The X-ray inspection apparatus according to claim 1, wherein the X-ray inspection apparatus is configured as described above.   The wall plate is erected and the open portion provided on the wall plate that is erected is formed between the wall plate and a peripheral edge located below the cover. The X-ray inspection apparatus according to claim 1 or 2.   The wall plate is disposed on the top surface, and the open portion provided on the wall plate disposed on the top surface is formed in a section located on the opposite side of the transport line at the periphery of the cover portion. The X-ray inspection apparatus according to claim 1, wherein the apparatus is an X-ray inspection apparatus. The X-ray inspection apparatus main body has an X-ray irradiation apparatus and a line sensor arranged facing each other up and down across the transport line,
Surrounding the periphery of the X-ray irradiation apparatus with a housing having an X-ray shielding function,
An opening that allows X-rays emitted from the X-ray irradiation device to pass through is provided on a surface of the housing that faces the transfer line.
An X-ray shielding sheet is disposed on each of the upstream side and the downstream side in the conveyance direction of the package with the line sensor interposed therebetween,
An X-ray shielding outer case surrounding the X-ray irradiation device, the line sensor, the housing, and the X-ray shielding sheet is disposed,
5. The X-ray inspection apparatus according to claim 1, wherein the transfer line is disposed so as to penetrate a carry-in opening and a carry-out opening provided in the X-ray shielding outer case. . The transport line in the X-ray inspection apparatus main body includes two endless belts spaced apart from each other on the left and right sides so that the packaging body is transported on the two endless belts,
6. The X-ray according to claim 1, wherein an X-ray irradiation unit that performs an X-ray inspection is arranged so as to be shifted forward and backward in the transport direction with respect to the two endless belts. Inspection device.

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