JP5525300B2 - X-ray foreign object detection device - Google Patents

Description

  The present invention relates to an X-ray foreign object detection device that detects foreign matter mixed in an object to be inspected, such as meat, fish, processed food, and pharmaceuticals, and more particularly, to an X-ray foreign object detection device that includes a weighing unit that measures the object to be inspected. Is.

  In general, an X-ray foreign object detection apparatus irradiates X-rays from X-ray generators on various types of inspection objects (for example, meat, fish, processed foods, pharmaceuticals, etc.) that are sequentially conveyed on a conveyance path at predetermined intervals. The inspection object is inspected for foreign substances such as metal, glass, stones, and bones, and a lack of the inspection object, based on the amount of transmitted X-rays.

  Conventionally, in this type of X-ray foreign matter detection apparatus, at least one of the carry-in conveyor or the carry-out conveyor is provided with a weighing unit for weighing the test object, and in addition to the inspection of foreign matter contamination on the test object. A technique is known in which the weight of an object to be inspected can be measured, the inspection line is shortened, and the productivity is improved (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-1207017

  However, in the conventional technique described in Patent Document 1, it is necessary to provide a curtain for preventing X-ray leakage on both the carry-in conveyor and the carry-out conveyor. However, this curtain has an adverse effect on the weighing of the inspection object. There was a fear of giving.

  That is, conventionally, the X-ray detector 112 detects X-rays generated by the X-ray generator 112 while the object W is being conveyed by the conveyor 122 as in the X-ray foreign object detector 101 shown in FIG. In addition, when the object W is weighed by the weighing means 111 while being transported by the conveyor 121, the X-ray leakage prevention curtain 130 rides on the object to be weighed. As a result, weighing accuracy may be reduced.

  Further, conventionally, like the X-ray foreign matter detection apparatus 102 shown in FIG. 6, the inspection object W is weighed by the weighing means 111 while being conveyed by the conveyor 125, and is conveyed by the X-ray generator 112 while being conveyed by the conveyor 124. The generated X-ray is detected by an X-ray detector to inspect the presence or absence of foreign matter, and when the sorting is performed by the flipper 141 as the sorting unit while being conveyed by the conveyor 123, the operated flipper 141 is placed on the curtain 130. There is a risk that the curtain 130 may be damaged due to contact and turned up, or X-rays may leak from a gap formed in the curtain 130.

  Accordingly, the present invention has been made to solve the above-described conventional problems, and provides an X-ray foreign object detection device that can prevent problems such as a decrease in measurement accuracy even if a measurement unit is provided. The purpose is to do.

An X-ray foreign matter detection apparatus according to the present invention generates an X-ray in a shielded housing having a carry-in port through which an inspection object is carried in and a carry-out port through which the inspection object is carried out. And an X-ray detection unit that receives X-rays from the X-ray generation unit, and the inspection object is placed at a predetermined position in a transfer space that is a substantially closed space from the carry-in port to the carry-out port. In an X-ray foreign matter detection apparatus that irradiates X-rays and inspects the presence or absence of foreign matter in the inspection object based on the amount of transmission, for transferring the inspection object to an X-ray irradiation region in the transfer space An X-ray conveyor, and a weighing conveyor which is adjacent to the X-ray conveyor and has a weighing means for weighing the object to be inspected, and has a horizontal conveying surface for conveying the object to be inspected in the conveying space, The X-ray irradiation area cannot be seen from the carry-in entrance and the carry-out exit The transfer space from said inlet port to said discharge port is formed by bending, the X-ray conveyor is arranged in front of the metering conveyor, the conveying surface of the height of the conveying surface of the X-ray conveyor and the measuring conveyor It is characterized by equal height .

With this configuration, X-rays reflected from the object to be inspected in the X-ray irradiation region are shielded by the bent inner wall of the conveyance space, and leakage from the carry-in port and the carry-out port is prevented. For this reason, it is not necessary to provide a curtain for shielding X-rays in the transport path as in the prior art, and when the curtain comes into contact with the object to be inspected or the wind is generated by the shaking of the curtain, the weighing means has a high measuring accuracy. It is possible to prevent adverse effects such as reduction. In addition, since the measuring means and the measuring conveyor are disposed in the substantially closed transfer space in the housing, it is possible to prevent wind from the outside from adversely affecting the measuring of the measuring means. Therefore, even if the weighing means is provided, it is possible to prevent problems such as a decrease in weighing accuracy.

In addition, since the X-ray conveyor in the previous stage of the weighing conveyor can be used as a running conveyor for the weighing means, it is not necessary to separately provide a running conveyor to maintain the weighing accuracy of the weighing means, and the weighing accuracy of the weighing means is maintained. The inspection line can be shortened while remaining.

  In the X-ray foreign object detection device according to the present invention, the conveyance surface height in the X-ray irradiation region is set higher than the conveyance surface height at the carry-in port and the conveyance surface height at the carry-out port. The space is bent.

  With this configuration, for example, it becomes easy to provide the sorting means at a higher position than the front stage or rear stage apparatus of the X-ray foreign matter detection apparatus. It is possible to secure a large number of accommodation locations for the inspected objects.

Further, the X-ray foreign object detection device according to the present invention is such that the height of the transfer surface in the X-ray irradiation region, the height of the transfer surface at the carry-in port, and the height of the transfer surface at the carry-out port are equal in the horizontal direction. The conveyance space is bent.

With this configuration, X-rays from the X-ray irradiation region are shielded by the bent inner wall of the conveyance space, and leakage from the carry-in entrance and the carry-out port is prevented. In addition, since the inspection object is conveyed and inspected on a horizontal plane, the conveyance of the inspection object W can be stabilized and the inspection accuracy can be improved.

In addition, the X-ray foreign object detection device according to the present invention generates X-rays in a shielded housing having a carry-in port through which an inspection object is carried in and a carry-out port through which the inspection object is carried out. A generation unit and an X-ray detection unit that receives X-rays from the X-ray generation unit, and the object to be inspected at a predetermined position in a conveyance space that is a substantially closed space from the carry-in port to the carry-out port In an X-ray foreign object detection apparatus for irradiating an object with X-rays and inspecting the presence or absence of a foreign substance in the inspection object based on the amount of transmission, the inspection object is transferred to an X-ray irradiation region in the transfer space An X-ray conveyor for measuring and a measuring conveyor adjacent to the X-ray conveyor and having a measuring means for measuring the object to be inspected, and having a horizontal conveying surface for conveying the object to be inspected in the conveying space, Provided that the X-ray irradiation area cannot be seen from the carry-in port and the carry-out port. As described above, the transfer space from the carry-in port to the carry-out port is formed to be bent, and the height of the transfer surface in the X-ray irradiation region is such that the height of the transfer surface at the carry-in port and the transfer at the carry-out port The conveyance space is bent at a height lower than the surface height .

With this configuration, for example, the X-ray foreign material detecting device, since it becomes easy to provide a position lower than the upstream or downstream of the device for X-ray foreign material detecting device, maintain low uppermost position of the X-ray foreign material detecting device be able to.

Moreover, the X-ray foreign material detection apparatus according to the present invention is characterized in that the X-ray conveyor is disposed in front of the weighing conveyor .

With this configuration, the X-ray conveyor in the previous stage of the weighing conveyor can be used as a running conveyor for the weighing means, so there is no need to separately provide a running conveyor to maintain the weighing accuracy of the weighing means. Ru it is possible to shorten the inspection line while maintaining the.

An X-ray foreign matter detection apparatus according to the present invention generates an X-ray in a shielded housing having a carry-in port through which an inspection object is carried in and a carry-out port through which the inspection object is carried out. And an X-ray detection unit that receives X-rays from the X-ray generation unit, and the inspection object is placed at a predetermined position in a transfer space that is a substantially closed space from the carry-in port to the carry-out port. In an X-ray foreign matter detection apparatus that irradiates X-rays and inspects the presence or absence of foreign matter in the inspection object based on the amount of transmission, for transferring the inspection object to an X-ray irradiation region in the transfer space An X-ray conveyor, and a weighing conveyor which is adjacent to the X-ray conveyor and has a weighing means for weighing the object to be inspected, and has a horizontal conveying surface for conveying the object to be inspected in the conveying space, The X-ray irradiation area cannot be seen from the carry-in entrance and the carry-out exit The transfer space from the carry-in entrance to the carry-out exit is formed by bending, the X-ray conveyor is arranged at the front stage of the weighing conveyor, the weighing conveyor is arranged at the front stage of the X-ray conveyor, and the X A height of the conveyance surface in the line irradiation region is lower than a height of the conveyance surface at the carry-in entrance and higher than a height of the conveyance surface at the carry-out exit, and the conveyance space is bent.

With this configuration, X-rays from the X-ray inspection region are shielded by the bent inner wall of the conveyance space, and leakage from the carry-in port and the carry-out port is prevented .

  In addition, the X-ray foreign object detection device according to the present invention is characterized in that a selection means for selecting the inspection object is provided in the casing.

  With this configuration, it is not necessary to separately provide an external sorting means at the subsequent stage of the X-ray foreign object detection device, and the overall length of the inspection line can be shortened. Moreover, since it is possible to prevent X-ray leakage without providing a curtain, it is possible to prevent the X-ray from leaking when the sorting means turns the curtain.

  The present invention can provide an X-ray foreign object detection device that can prevent problems such as a decrease in measurement accuracy even if it includes a measurement unit.

It is a side view which shows the X-ray foreign material detection apparatus which concerns on the 1st Embodiment of this invention. It is a side view which shows the X-ray foreign material detection apparatus which concerns on the 2nd Embodiment of this invention. It is a side view which shows the X-ray foreign material detection apparatus which concerns on the 3rd Embodiment of this invention. It is a top view which shows the X-ray foreign material detection apparatus which concerns on the 4th Embodiment of this invention. It is a side view which shows an example of the conventional X-ray foreign material detection apparatus. It is a side view which shows the other example of the conventional X-ray foreign material detection apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, the configuration will be described.

  As shown in FIG. 1, the X-ray foreign object detection apparatus 1 includes an X-ray generator 9 that irradiates an inspection object W with X-rays, and an X-ray detector 10 that detects X-rays that have passed through the inspection object W. The weighing means 11 for weighing the inspection object W, the flipper 13 for selecting the inspection object W, the X-ray conveyor 32 for conveying the inspection object W, the weighing conveyor 33, the selection conveyor 34, and the leakage prevention cover 21 ,have.

  An X-ray generator 9 as an X-ray generation source is configured as a metal box, and has a cylindrical X-ray tube 12 immersed in insulating oil (not shown) inside. An X-ray is generated by irradiating an anode target with an electron beam from the cathode of the tube 12. The X-ray tube 12 is arranged so that the longitudinal direction thereof is the conveyance direction of the inspection object W (left and right direction in the figure). X-rays generated by the X-ray tube 12 are directed toward the lower X-ray detector 10 from an irradiation port whose longitudinal direction is the direction perpendicular to the transport direction formed on the upper surface of the transport space S by a slit (not shown). A substantially triangular screen is formed so as to cross the conveying direction. The object W is inspected for the presence of foreign matter by the X-ray generator 9 and the X-ray detector 10 while being conveyed on the X-ray conveyor 32.

  The weighing means 11 is a load sensor that supports the weighing conveyor 33 and outputs a weighing signal based on the load of the object to be weighed. The weighing means 11 is composed of a scale mechanism such as an electromagnetic balance mechanism, and the object to be inspected W is placed on the weighing conveyor 33. The load applied during the transport is measured. The weighing unit 11 may be a scale mechanism that can measure the weight, and may be configured by a scale mechanism such as a differential transformer mechanism or a strain gauge mechanism.

  The flipper 13 sorts the inspection object W mixed with foreign matters or deviating from the specified weight range. The flipper 13 drops the inspection object W from the sorting conveyor 34 to the outside of the conveyance path, or inspects on the sorting conveyor 34. The conveyance direction of the article W is changed. The flipper 13 is disposed inside the housing 4. As the sorting means, instead of the flipper 13, for example, the sorting conveyor 34 may be tilted vertically so that the inspection object W is dropped in a drop box (not shown) disposed below the sorting conveyor 34. Good. Here, the housing 4 is a housing composed of a plurality of members that separates the inside and outside of the transport space S and shields X-rays. The leakage prevention cover 21, the X-ray conveyor 32, and the weighing conveyor 33 described later. In addition, the sorting conveyor 34 is constituted by a receiving plate that constitutes a conveying surface of each conveyor. The receiving plate is a plate-like member that is arranged in each conveyor and extends in the horizontal direction and shields X-rays.

  The X-ray conveyor 32, the weighing conveyor 33, and the sorting conveyor 34 sequentially convey the inspection object W at a predetermined interval, and are arranged horizontally or inclined inside the housing 4.

  The X-ray conveyor 32 is a belt that is stretched around a roller 41, 42 in a horizontal and inclined manner, and has an inclined portion 32a and a horizontal portion 32b. The X-ray conveyor 32 carries the inspection object W into the X-ray foreign matter detection apparatus 1 from a preceding conveyor (not shown) arranged on the right side in the drawing by the inclined portion 32a, and the X-ray conveyor W by the horizontal portion 32b. An X-ray inspection position P1 immediately below the generator 9 is allowed to pass. In the inclined portion 32a, the end portion far from the inspection position P1 is lower than the inspection position P1, and the end portion close to the inspection position P1 is an inclined surface whose vertical position is equal to the inspection position P1. A slit is provided at the inspection position of the receiving plate that forms the transport surface of the X-ray conveyor 32, and the X-ray generated by the X-ray generator 9 passes through the slit of the receiving plate and the X-ray detector 10. To be detected.

  The weighing conveyor 33 is disposed adjacent to the rear stage of the X-ray conveyor 32, is a belt that is stretched horizontally around rollers 44 and 45, is supported by the weighing means 11 disposed below, and is disposed on the weighing conveyor 33. The inspection object W is allowed to pass through a predetermined weighing position P2 on 33. The X-ray conveyor 32 in the preceding stage of the weighing conveyor 33, particularly the horizontal portion 32b for X-ray inspection of the X-ray conveyor 32, synchronizes the timing of the inspection object W conveyed to the weighing conveyor 33 provided below the weighing means 11. It functions as a so-called run-up conveyor.

  The sorting conveyor 34 is disposed adjacent to the rear stage of the weighing conveyor 33, and is configured by inclining a belt around the rollers 46 and 47 so that the inspection object W is carried out from the X-ray foreign object detection device 1. It has become. On the sorting conveyor 34, the aforementioned flipper 13 is provided. The sorting conveyor 34 has an inclined surface whose end far from the inspection position P1 is lower than the inspection position P1 and whose end close to the inspection position P1 is equal in position to the inspection position P1 in the vertical direction.

  Thus, the horizontal part 32b of the X-ray conveyor 32 and the weighing conveyor 33 are arranged horizontally, and the inclined part 32b of the X-ray conveyor 32 and the sorting conveyor 34 are arranged inclined.

  Each conveyor has a receiving plate (not shown) that constitutes a conveyance surface. The receiving plate has a function of blocking X-rays, and the X-rays do not leak below the X-ray foreign object detection device 1.

  At least one of the rollers 41, 42, and 43, at least one of the rollers 44 and 45, and at least one of the rollers 46 and 47 are configured as a driving roller connected to a driving source, and are not shown in the drawing. The drive is controlled independently by the means.

  The leakage prevention cover 21 surrounds the upper space of the X-ray conveyor 32 and the weighing conveyors 33 and 34 to shield X-rays reflected from the inspection position P1, and covers the outer end portions of the X-ray conveyor 32 and the sorting conveyor 34. A carry-in port 30 through which the inspection object W is carried in and a carry-out port 35 through which the inspection object W is carried out are formed. The upper surface of the leakage prevention cover 21 is provided with a certain interval in the height direction between the X-ray conveyor 32 and the weighing conveyors 33 and 34 so that the inspection object W having a desired size can pass therethrough. Has been placed. For this reason, the leakage prevention cover 21 is inclined along the inclined portion 32a of the X-ray conveyor 32 and the sorting conveyor 34 above the inclined portion 32a of the X-ray conveyor 32 and the sorting conveyor 34. The horizontal portion 32 b and the upper portion of the weighing conveyor 33 are horizontal along the horizontal portion 32 b and the weighing conveyor 33 of the X-ray conveyor 32. A space enclosed by the leakage prevention cover 21 from the carry-in entrance 30 to the carry-out exit 35 and the receiving plate that constitutes the carrying surface of each conveyor constitutes a carrying space S.

  Moreover, in the X-ray foreign material detection apparatus 1, the conveyance space S from the carry-in port 30 to the carry-out port 35 is bent so that the inspection position P1 that is the X-ray irradiation region cannot be seen from the carry-in port 30 and the carry-out port 35. Is formed. That is, the inspection position P1 cannot be seen through the inner wall of the transport space S from the carry-in port 30 and the carry-out port 35 toward the test position P1. Specifically, the conveyance space S is bent such that the height of the conveyance surface at the X-ray inspection position P1 is higher than the height of the conveyance surface at the carry-in port 30 and the height of the conveyance surface at the carry-out port 35. For this reason, the vicinity of the end portion of the X-ray conveyor 32 near the inspection position P1 is interposed between the inspection position P1 and the carry-in entrance 30, and the vicinity of the end portion of the sorting conveyor 34 near the inspection position P1. Is interposed between the inspection position P1 and the carry-out port 35.

  As a result, the X-rays reflected at the inspection position P1 are shielded by the leakage prevention cover 21 to prevent upward and lateral leakage, and are shielded by the receiving plate that constitutes the transport surface of each conveyor and leak downward. And is shielded by the bent inner wall of the conveyance space S, that is, near the end of the X-ray conveyor 32 near the inspection position P1 and near the end of the sorting conveyor 34 near the inspection position P1. Leakage from the carry-in port 30 and the carry-out port 35 is prevented. Depending on the required X-ray attenuation, the radiation of the X-ray reflected at the inspection position P1 to the entrance 30 and the exit 35 may be near the end of the X-ray conveyor 32 near the inspection position P1 or The screening conveyor 34 may not be completely shielded by the vicinity of the end near the inspection position P1.

  As described above, the X-ray foreign object detection apparatus 1 according to the present embodiment has a shielding structure having the carry-in port 30 into which the inspection object W is carried in and the carry-out port 35 through which the inspection object W is carried out. 4, an X-ray generator 9 for generating X-rays, and an X-ray detector 10 for receiving X-rays from the X-ray generator 9, and a substantially closed space from the carry-in port 30 to the carry-out port 35, In the X-ray foreign object detection apparatus 1 that irradiates the inspection object W with X-rays at a predetermined position in the conveyance space S and inspects the presence or absence of the foreign substance in the inspection object W based on the transmission amount, the conveyance space S An X-ray inspection X-ray conveyor 32 for transporting the inspection object W to the inspection position P1 which is an X-ray irradiation area in the inside, and a weighing means 11 adjacent to the X-ray conveyor 32 and weighing the inspection object W Weighing conveyor for weighing with a horizontal conveying surface for conveying an inspected object W in the conveying space S 33, includes a, so inspection position P1 is not foresee the entrance 30 and the outlet port 35, transfer space S from entrance 30 to outlet port 35 is characterized by being formed by bending.

  With this configuration, X-rays reflected at the inspection position P1 are bent at the inner wall of the conveyance space S, that is, near the end of the X-ray conveyor 32 near the inspection position P1 or near the inspection position P1 of the sorting conveyor 34. Leakage from the carry-in entrance 30 and the carry-out exit 35 is prevented. For this reason, it is not necessary to provide a curtain for shielding X-rays in the transport space S as in the prior art, and the curtain is brought into contact with the object W to be inspected or wind is generated by the swing of the curtain. It is possible to prevent adverse effects such as a decrease in measurement accuracy. In addition, since the weighing conveyor 33 provided with the weighing means 11 is covered with the leakage prevention cover 21, it is possible to prevent wind from the outside from adversely affecting the weighing of the weighing means 11.

  Therefore, even if the weighing means 11 is provided, it is possible to prevent problems such as a decrease in weighing accuracy.

  Further, the X-ray foreign object detection device 1 according to the present embodiment conveys the conveyance surface at the inspection position P1 with a height higher than the conveyance surface at the carry-in entrance 30 and the conveyance surface at the carry-out exit 35. The space S is bent.

  With this configuration, for example, it becomes easy to provide the flipper 13 as the sorting means at a position higher than the transport conveyors before and after the X-ray foreign matter detection apparatus 1, so the inspection object W is dropped by the flipper 13 and sorted. In this case, it is possible to secure a large number of accommodation locations for the selected inspection object W.

  In addition, the X-ray foreign object detection apparatus 1 according to the present embodiment is characterized in that an X-ray inspection X-ray conveyor 32 is disposed in front of the weighing conveyor 33.

  With this configuration, the horizontal portion 32b of the X-ray conveyor 32 in the preceding stage of the weighing conveyor 33 provided with the weighing means 11 can be used as a running conveyor of the weighing means 11, so that the weighing accuracy of the weighing means 11 is maintained. It is no longer necessary to separately provide a run-up conveyor, and the inspection line can be shortened while maintaining the weighing accuracy of the weighing means 11.

  The X-ray foreign object detection device 1 according to the present embodiment is characterized in that a flipper 13 for selecting the inspection object W is provided inside the housing 4.

  With this configuration, it is not necessary to separately provide an external sorting means at the subsequent stage of the X-ray foreign object detection device 1, and the overall length of the inspection line can be shortened. Further, since X-ray leakage can be prevented without providing a curtain, it is possible to prevent the X-ray from leaking when the flipper 13 turns the curtain.

(Second Embodiment)
In this embodiment, the direction in which the conveyance space S bends is opposite to that in the first embodiment. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 2, the X-ray foreign object detection device 2 of the present embodiment includes an X-ray conveyor 32, a weighing conveyor 33, a sorting conveyor 34, and a leakage prevention cover of the X-ray foreign object detection device 1 of the first embodiment. In place of 21, a conveyor 51, an X-ray conveyor 52, a weighing conveyor 53, a sorting conveyor 54 and a leakage prevention cover 22 are provided.

  The conveyor 51, the X-ray conveyor 52, the weighing conveyor 53, and the sorting conveyor 54 sequentially convey the inspection object W at a predetermined interval, and are arranged horizontally or inclined inside the housing 4. .

  The conveyor 51 is configured by inclining a belt around rollers 61 and 62, and carries the inspection object W into the X-ray foreign object detection device 1. The conveyor 51 has an inclined surface whose end far from the inspection position P1 is higher than the inspection position P1 and whose end close to the inspection position P1 is equal in position to the inspection position P1 in the vertical direction.

  The X-ray inspection 52 for X-ray inspection is disposed adjacent to the rear stage of the transfer conveyor 51, and a belt is horizontally stretched around the rollers 63 and 64, and the inspection object W is attached to the X-ray generator 9. The inspection position P1 of the X-ray directly below is allowed to pass. A slit is provided at the inspection position of the receiving plate that forms the conveying surface of the X-ray conveyor 52, and the X-ray generated by the X-ray generator 9 passes through the slit of the receiving plate and becomes the X-ray detector 10. To be detected.

  The weighing conveyor 53 for measurement is disposed adjacent to the rear stage of the X-ray conveyor 52, is a belt stretched horizontally around rollers 65 and 66, and is supported by the weighing means 11 disposed below. The inspection object W is passed through a predetermined weighing position P2 on the weighing conveyor 53. The X-ray inspection X-ray conveyor 52 in front of the weighing conveyor 53 functions as a so-called run-up conveyor for adjusting the timing of the inspection object W conveyed by the weighing means 11 to the weighing conveyor 53 provided below. .

  The sorting conveyor 54 is disposed adjacent to the rear stage of the weighing conveyor 53, and is configured by inclining a belt around rollers 67 and 68 so that the inspection object W is carried out from the X-ray foreign object detection device 1. It has become. A flipper 13 is provided on the sorting conveyor 54. The sorting conveyor 54 has an inclined surface whose end portion far from the inspection position P1 is higher than the inspection position P1 and whose end portion close to the inspection position P1 has the same vertical position as the inspection position P1.

  As described above, the transport conveyor 51, the X-ray conveyor 52, the weighing conveyor 53, and the sorting conveyor 54 are composed of a horizontal portion and inclined portions that are connected before and after the horizontal portion.

  Each conveyor has a receiving plate (not shown) that constitutes a conveyance surface. The receiving plate has a function of blocking X-rays, and the X-rays do not leak below the X-ray foreign object detection device 1.

  At least one of the rollers 61 and 62, at least one of the rollers 63 and 64, at least one of the rollers 65 and 66, and at least one of the rollers 67 and 68 are configured as a driving roller connected to a driving source. The drive is independently controlled by a control means (not shown).

  The leakage prevention cover 22 surrounds the upper space of the transport conveyor 51, the X-ray conveyor 52, the weighing conveyor 53, and the sorting conveyor 54 and shields the X-rays reflected from the inspection position P1. A carry-in port 50 through which the inspection object W is carried in and a carry-out port 55 through which the inspection object W is carried out are formed at the outer end portions, respectively. The upper surface of the leakage prevention cover 22 is arranged in the height direction between the transport conveyor 51, the X-ray conveyor 52, the weighing conveyor 53, and the sorting conveyor 54 so that the inspection object W having a desired size can pass therethrough. They are arranged at regular intervals. For this reason, the leakage prevention cover 22 is inclined along the conveying conveyor 51 and the sorting conveyor 54 at the upper part of the inclined conveying conveyor 51 and the sorting conveyor 54, and the upper part of the horizontal X-ray conveyor 52 and the weighing conveyor 53. Then, it is horizontal along the X-ray conveyor 52 and the weighing conveyor 53. The leakage prevention cover 22 from the carry-in entrance 50 to the carry-out exit 55 and the space surrounded by each conveyor and substantially closed constitute a transport space S.

  Further, in the X-ray foreign matter detection device 2, the height of the transfer surface at the X-ray inspection position P1 is set lower than the height of the transfer surface at the carry-in entrance 50 and the height of the transfer surface at the carry-out port 55. Is bent. For this reason, at least a part of the transport conveyor 51 or the leakage prevention cover 22 is interposed between the inspection position P1 and the carry-in entrance 50, and at least a part of the sorting conveyor 54 or the leakage prevention cover 22 is in the inspection position P1. And the carry-out port 55.

  As a result, the X-rays reflected at the inspection position P1 are shielded by the leakage prevention cover 22 and prevented from leaking upward and laterally, and are shielded by the receiving plate constituting the conveyor surface of each conveyor and leaked downward. Is prevented by the bent portion of the leakage prevention cover 22 formed along the bent conveyance space S, and leakage from the carry-in port 50 and the carry-out port 55 is prevented.

  As described above, in the X-ray foreign object detection device 2 according to the present embodiment, the height of the conveyance surface at the X-ray inspection position P <b> 1 is the height of the conveyance surface at the carry-in entrance 50 and the conveyance surface at the carry-out exit 55. It is characterized in that the conveyance space S is bent below the height.

  With this configuration, for example, the X-ray foreign object detection device 2 can be easily provided at a lower position than the preceding or subsequent device of the X-ray foreign object detection device 2. For example, the upper surface of the housing 4 can be kept low.

(Third embodiment)
In the present embodiment, the transport space S is bent by providing a step on the transport surface. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 3, the X-ray foreign object detection device 3 of the present embodiment includes the X-ray conveyor 32, the weighing conveyor 33, the sorting conveyor 34, and the leakage prevention cover of the X-ray foreign object detection device 1 of the first embodiment. In place of 21, a weighing conveyor 71, an X-ray conveyor 72, a sorting conveyor 73 and a leakage prevention cover 23 are provided.

  The weighing conveyor 71, the X-ray conveyor 72, and the sorting conveyor 73 sequentially convey the inspected object W at a predetermined interval, and are arranged horizontally with a step in the vertical direction inside the housing 4. Yes.

  The weighing conveyor 71 is formed by horizontally stretching a belt around rollers 81 and 82, supported by weighing means 11 disposed below, and inspected object W at a predetermined weighing position P <b> 2 on the sorting conveyor 73. Is supposed to pass through. In addition, the weighing conveyor 71 is configured to carry the inspection object W into the X-ray foreign object detection device 3. The weighing conveyor 71 has a horizontal plane in which the end on the side far from the inspection position P1 and the end on the near side are higher than the inspection position P1.

  An X-ray conveyor 72 for X-ray inspection is disposed adjacent to the rear stage of the weighing conveyor 71, and a belt is stretched horizontally around rollers 83 and 84. The inspection position P1 of the X-ray directly below is allowed to pass. The X-ray conveyor 72 is disposed below the weighing conveyor 71. A slit is provided at the inspection position of the receiving plate that forms the conveying surface of the X-ray conveyor 72, and the X-ray generated by the X-ray generator 9 passes through the slit of the receiving plate and the X-ray detector 10. To be detected.

  The sorting conveyor 73 is disposed adjacent to the rear stage of the X-ray conveyor 72 and is configured by horizontally stretching a belt around the rollers 85 and 86 so that the inspection object W is carried out from the X-ray foreign object detection device 3. It has become. The sorting conveyor 73 is disposed below the X-ray conveyor 72. A flipper 13 is provided on the sorting conveyor 73. The sorting conveyor 73 has a horizontal plane in which the end on the side far from the inspection position P1 and the end on the near side are lower than the inspection position P1.

  Thus, the weighing conveyor 71, the X-ray conveyor 72, and the sorting conveyor 73 are provided with steps in the vertical direction. The weighing conveyor 71 provided with the weighing means 11 below has the same vertical position as the preceding conveyor (not shown), so that the inspection object W is horizontally loaded from the preceding conveyor, and the weighing conveyor 71 receives the inspection object. The impact due to the vertical movement of W does not occur. For this reason, the weighing means 11 is not adversely affected by vibration of the inspection object W when the inspection object W is carried into the weighing conveyor 71.

  Each conveyor has a receiving plate (not shown) that constitutes a conveyance surface. The receiving plate has a function of blocking X-rays, and the X-rays do not leak below the X-ray foreign object detection device 3.

  At least one of the rollers 81 and 82, at least one of the rollers 83 and 84, and at least one of the rollers 85 and 86 are configured as drive rollers connected to a drive source, and are independently controlled by a control unit (not shown). Thus, the drive is controlled.

  The leakage prevention cover 23 surrounds the upper space of the weighing conveyor 71, the X-ray conveyor 72, and the sorting conveyor 73 and shields the X-rays reflected from the inspection position P1, and at the outer ends of the weighing conveyor 71 and the sorting conveyor 73. A carry-in port 70 into which the inspection object W is carried in and a carry-out port 75 through which the inspection object W is carried out are formed. The upper surface of the leakage prevention cover 23 has a certain distance in the height direction between the weighing conveyor 71, the X-ray conveyor 72, and the sorting conveyor 73 so that the inspection object W having a desired size can pass therethrough. It is provided and arranged. For this reason, the leakage prevention cover 23 includes three horizontal portions having steps in the vertical direction. The leakage prevention cover 23 from the carry-in entrance 70 to the carry-out exit 75 and the space surrounded by each conveyor and substantially closed constitute a transport space S.

  Further, in the X-ray foreign matter detection apparatus 3, a weighing conveyor 71 for measurement is arranged in front of the X-ray conveyor 72 for X-ray inspection, and the height of the conveyance surface at the X-ray inspection position P1 is set at the carry-in entrance 70. The conveyance space S is bent so as to be lower than the height of the conveyance surface in FIG. For this reason, at least a part of the weighing conveyor 71 or the leakage prevention cover 23 is interposed between the inspection position P1 and the carry-in entrance 70, and at least a part of the sorting conveyor 73 or the leakage prevention cover 23 is in the inspection position P1. And the outlet 75.

  Thereby, the X-rays reflected at the inspection position P1 are shielded by the bent inner wall of the conveyance space S, and leakage from the carry-in port 50 and the carry-out port 55 is prevented. That is, the X-rays reflected at the inspection position P1 are shielded by the leakage prevention cover 23 to prevent upward and lateral leakage, and are shielded by the receiving plate constituting the conveyor surface of each conveyor, so that downward leakage is prevented. In addition to being prevented, leakage from the carry-in port 50 and the carry-out port 55 is prevented by being shielded by the vicinity of the end portion of the weighing conveyor 71 near the inspection position P1 and the upper portion of the sorting conveyor 73 of the leakage prevention cover 23. The

  As described above, in the X-ray foreign object detection device 3 according to the present embodiment, the weighing weighing conveyor 71 is arranged in front of the X-ray X-ray conveyor 72 and the conveyance surface at the X-ray inspection position P1 is set. The conveyance space S is bent such that the height is lower than the height of the conveyance surface at the carry-in entrance 70 and higher than the height of the conveyance surface at the carry-out port 75.

  With this configuration, X-rays from the X-ray inspection position P <b> 1 are shielded by the inner wall of the bent conveyance space, and leakage from the carry-in entrance 50 and the carry-out exit 55 is prevented.

(Fourth embodiment)
In this embodiment, the conveyance space S is bent in the horizontal direction. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  As shown in a top view in FIG. 4, the X-ray foreign object detection device 100 of the present embodiment includes an X-ray conveyor 32, a weighing conveyor 33, a sorting conveyor 34, and the X-ray foreign object detection device 1 of the first embodiment. Instead of the leakage prevention cover 21, transport conveyors 91, 92, 95, an X-ray conveyor 93, a weighing conveyor 94, a sorting conveyor 96, and a leakage prevention cover 24 are provided.

  The conveyors 91, 92, 95, the X-ray conveyor 93, the weighing conveyor 94, and the sorting conveyor 96 sequentially convey the inspected object W at a predetermined interval. Arranged at height.

  The conveyors 91 and 92 are configured to carry the inspection object W into the X-ray foreign matter detection apparatus 100 from a preceding conveyor (not shown) arranged on the right side in the drawing. The X-ray conveyor 93 is arranged adjacent to the rear stage of the transport conveyor 92 and is configured as an X-ray inspection conveyor that passes the inspection object W to the X-ray inspection position P1. The weighing conveyor 94 is supported by weighing means (not shown) arranged below, and is configured as a weighing conveyor that passes the inspection object W to a predetermined weighing position P2 on the weighing conveyor 94. Further, the transport conveyor 95 transports the inspection object W from the weighing conveyor 94 to the sorting conveyor 96, and the sorting conveyor 96 sorts the inspection object W by the flipper 13 or carries it out of the X-ray foreign matter detection apparatus 1. It has become. The conveyors 92 and 95 are formed in a substantially fan shape, and the conveyance direction of the inspection object W is changed to the horizontal direction.

  Each conveyor has a receiving plate (not shown) that constitutes a conveyance surface. The receiving plate has a function of blocking X-rays, and the X-rays do not leak below the X-ray foreign object detection device 3. A slit is provided at the inspection position of the receiving plate that forms the conveying surface of the X-ray conveyor 93, and the X-ray generated by the X-ray generator 9 passes through the slit of the receiving plate and the X-ray detector 10. To be detected.

  The conveyance path formed by the conveyance conveyor 91 is provided at a predetermined angle in the horizontal direction with respect to the linear conveyance path formed by the X-ray conveyor 93 and the weighing conveyor 94. Is formed at a predetermined angle with respect to the linear conveyance path formed by the X-ray conveyor 93 and the weighing conveyor 94. That is, the conveyance path formed by each conveyor is bent in the horizontal direction.

  The leakage prevention cover 24 surrounds the upper space of each conveyor and shields the X-rays reflected from the inspection position P1, and also allows the inspection object W to be carried into the outer ends of the transfer conveyor 91 and the sorting conveyor 96. 90 and an exit 97 from which the inspection object W is unloaded are formed. The upper surface of the leakage prevention cover 24 is arranged with a certain interval in the height direction between each conveyor so that the inspection object W of a desired size can pass therethrough. The leakage prevention cover 24 from the carry-in port 90 to the carry-out port 97 and the space surrounded by each conveyor and substantially closed constitute a transport space S. For this reason, the height of the conveyance surface at the X-ray inspection position P1, the height of the conveyance surface at the carry-in port 90, and the height of the conveyance surface at the carry-out port 97 are equal, and the conveyance space S is bent in the horizontal direction.

  As a result, the X-rays reflected at the inspection position P1 are shielded by the bent inner wall of the transport space S, that is, the leakage prevention cover 24 and the receiving plate that forms the transport surface of each conveyor. Leakage is prevented.

  As described above, the X-ray foreign object detection apparatus 100 according to the present embodiment has the height of the conveyance surface at the X-ray inspection position P1, the height of the conveyance surface at the carry-in port 90, and the height of the conveyance surface at the carry-out port 97. And the conveyance space S is bent in the horizontal direction.

  With this configuration, X-rays reflected at the inspection position P1 are shielded by the bent inner wall of the conveyance space S, and leakage from the carry-in port 90 and the carry-out port 97 is prevented. In addition, since the inspection object W is transported and inspected on a horizontal plane, the transportation of the inspection object W can be stabilized and the inspection system can be improved.

  The first to fourth embodiments can also be implemented by combining them. For example, the first embodiment and the fourth embodiment may be combined so that the conveyance space S is bent in both the vertical direction and the horizontal direction.

  As described above, the X-ray foreign object detection device according to the present invention has an effect that it is possible to prevent problems such as a decrease in measurement accuracy even if the measurement unit is provided, and the measurement unit that measures an object to be inspected. It is useful as an X-ray foreign material detection apparatus comprising

1, 2, 3 X-ray foreign object detection device 4 Housing 9 X-ray generator (X-ray generator)
10 X-ray detector (X-ray detector)
11 Measuring means 12 X-ray tube 13 Flipper (sorting means)
21, 22, 23 Leakage prevention cover 30, 50, 70, 90 Carry-in port 35, 55, 75, 97 Carry-out port 32, 52, 72, 93 X-ray conveyor 32a Inclined part 32b Horizontal part 33, 53, 71, 94 Weighing Conveyor 34, 54, 73, 96 Sorting conveyor 41, 42, 43, 44, 45, 46, 47, 61, 62, 63, 64, 65, 66, 67, 68, 81, 82, 83, 84, 85, 86 Roller 51, 91, 92, 95, 96 Transport conveyor S Transport space P1 Inspection position (X-ray irradiation area)
P2 Weighing position W Inspected object

Claims (7)

X-ray generation for generating X-rays in a shield structure housing (4) having a carry-in port (30) into which an object to be inspected (W) is carried and a carry-out port (35) from which the object to be inspected is carried out A transport space (S) that is a substantially closed space from the carry-in port to the carry-out port, comprising a portion (9) and an X-ray detector (10) that receives X-rays from the X-ray generator In the X-ray foreign object detection device (1) for irradiating the inspection object with X-rays at a predetermined position and inspecting the presence or absence of the foreign object in the inspection object based on the amount of transmission
An X-ray conveyor (32) for transferring the inspection object to the X-ray irradiation region (P1) in the transfer space;
A weighing conveyor (33) which is adjacent to the X-ray conveyor and has a weighing means (11) for weighing the object to be inspected, and has a horizontal conveying surface for conveying the object to be inspected in the conveying space. ,
The conveyance space from the carry-in port to the carry-out port is bent and formed so that the X-ray irradiation region cannot be seen from the carry-in port and the carry-out port ,
The X-ray foreign object detection device , wherein the X-ray conveyor is disposed in a stage preceding the weighing conveyor, and the height of the conveying surface of the X-ray conveyor is equal to the height of the conveying surface of the weighing conveyor .   The height of the conveyance surface in the X-ray irradiation region is higher than the height of the conveyance surface at the carry-in port and the height of the conveyance surface at the carry-out port, and the conveyance space is bent. The X-ray foreign matter detection device according to 1. The height of the transfer surface in the X-ray irradiation region, the height of the transfer surface at the carry-in port, and the height of the transfer surface at the carry-out port are equal, and the transfer space is bent in the horizontal direction. The X-ray foreign material detection apparatus according to claim 1. X-ray generation for generating X-rays in a shield structure housing (4) having a carry-in port (30) into which an object to be inspected (W) is carried and a carry-out port (35) from which the object to be inspected is carried out A transport space (S) that is a substantially closed space from the carry-in port to the carry-out port, comprising a portion (9) and an X-ray detector (10) that receives X-rays from the X-ray generator In the X-ray foreign object detection device (1) for irradiating the inspection object with X-rays at a predetermined position and inspecting the presence or absence of the foreign object in the inspection object based on the amount of transmission
An X-ray conveyor (32) for transferring the inspection object to the X-ray irradiation region (P1) in the transfer space;
A weighing conveyor (33) which is adjacent to the X-ray conveyor and has a weighing means (11) for weighing the object to be inspected, and has a horizontal conveying surface for conveying the object to be inspected in the conveying space. ,
The conveyance space from the carry-in port to the carry-out port is bent and formed so that the X-ray irradiation region cannot be seen from the carry-in port and the carry-out port,
The X-ray is characterized in that the transfer space is bent with the height of the transfer surface in the X-ray irradiation region being lower than the height of the transfer surface at the carry-in port and the height of the transfer surface at the carry-out port. Foreign object detection device. The X-ray foreign object detection device according to claim 4 , wherein the X-ray conveyor is arranged in a stage preceding the weighing conveyor . X-ray generation for generating X-rays in a shield structure housing (4) having a carry-in port (30) into which an object to be inspected (W) is carried and a carry-out port (35) from which the object to be inspected is carried out A transport space (S) that is a substantially closed space from the carry-in port to the carry-out port, comprising a portion (9) and an X-ray detector (10) that receives X-rays from the X-ray generator In the X-ray foreign object detection device (1) for irradiating the inspection object with X-rays at a predetermined position and inspecting the presence or absence of the foreign object in the inspection object based on the amount of transmission
An X-ray conveyor (32) for transferring the inspection object to the X-ray irradiation region (P1) in the transfer space;
A weighing conveyor (33) which is adjacent to the X-ray conveyor and has a weighing means (11) for weighing the object to be inspected, and has a horizontal conveying surface for conveying the object to be inspected in the conveying space. ,
The conveyance space from the carry-in port to the carry-out port is bent and formed so that the X-ray irradiation region cannot be seen from the carry-in port and the carry-out port,
The weighing conveyor is disposed in front of the X-ray conveyor, and the height of the transfer surface in the X-ray irradiation region is lower than the transfer surface at the carry-in entrance and higher than the transfer surface at the carry-out exit. An X-ray foreign object detection device characterized in that a conveyance space is bent .   The X-ray foreign object detection device according to any one of claims 1 to 6, further comprising sorting means (13) for sorting the inspection object in the housing.

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