Radiation inspection equipment and baggage inspection equipment

Abstract

To enable achievement of a CT inspection device which is small in size and low cost.SOLUTION: In a shielding box 1, an irradiation inspection device includes: an X-ray source 2 for irradiating an object 8 to be inspected with an X-ray RL; a line-shaped X-ray sensor part 3 for receiving components transmitted through the object 8 to be inspected among X-rays RL from the X-ray source 2; and a rotating device 4 which rotates the object 8 to be inspected by using the direction crossing a long axis of the line-shaped X-ray sensor part 3 as a rotating shaft in an irradiation area where the X-ray RL is directly incident.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a radiation inspection device that inspects an object by irradiating the object with radiation, and in particular to a radiation inspection device and baggage inspection device that make it possible to realize a small, low-cost CT (computed tomography) inspection device. [Background technology]

[0002] Conventional X-ray inspection devices of this type have an X-ray source that irradiates a sample with X-rays and an X-ray sensor that detects X-rays that have passed at least partially through the sample. A gantry has been rotated around the sample, allowing the sample to be inspected from various angles (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2018-506023 Summary of the Invention [Problem to be solved by the invention]

[0004] However, such conventional X-ray inspection equipment had problems such as the large size of the equipment due to the high speed rotation of the gantry, and the high weight of the gantry to prevent X-ray leakage, as well as the high cost due to the large-scale rotation mechanism.

[0005] Therefore, an object of the present invention is to provide a radiation inspection device and a baggage inspection device that address such problems and enable a small, low-cost CT inspection device to be realized. [Means for solving the problem]

[0006] In order to achieve the above object, a radiation inspection apparatus according to the present invention includes a front-stage conveyance device that conveys a tray on which an object to be inspected is placed into a shielding box, a radiation source that is disposed in the shielding box and irradiates the object to be inspected with radiation, a linear radiation sensor unit that is disposed in the shielding box and receives a component of the radiation from the radiation source that has passed through the object to be inspected and the tray, and a radiation sensor unit that is disposed in the shielding box and detects the object to be inspected and the tray. On the rotating part Hold, The rotating part holding the object to be inspected and the tray is The direction intersecting the long axis of the linear radiation sensor is the axis of rotation. The inspection object passes through an irradiation area where the radiation is directly incident by moving along the rotation axis while rotating. and a subsequent transport device that receives the objects to be inspected and the tray from the rotation device and transports the tray with the objects to be inspected outside the shielding box.

[0007] A baggage inspection device according to the present invention includes the above-mentioned radiation inspection device and inspects baggage as an object to be inspected. Effect of the Invention

[0008] According to the present invention, since the inspection object is rotated by the rotation device around a rotation axis intersecting the long axis of the linear radiation sensor unit within an irradiation area where radiation is directly incident, the configuration of the rotation device is simpler than that of a conventional X-ray inspection device that rotates a gantry. Therefore, it is possible to realize a small-sized, low-cost radiation inspection device that enables CT inspection of the contents of the inspection object. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view that illustrates a schematic configuration of an embodiment of an X-ray inspection apparatus according to the present invention. [Diagram 2] FIG. 2 is a conceptual diagram illustrating a schematic configuration of the rotation device according to the embodiment. [Diagram 3] FIG. 2 is a front view showing a schematic configuration of the rotation device according to the embodiment. [Figure 4] 1A and 1B are diagrams showing an example of the configuration of a tray used in an X-ray inspection apparatus according to the present invention, where (a) is a plan view and (b) is a front view. [Diagram 5] 1A and 1B are diagrams illustrating the fixing mechanism of the rotating device of the above embodiment, where (a) is a plan view showing the positional relationship between the tray on which the fixing mechanism operates and the rotating part of the rotating device, and (b) is a partially cross-sectional plan view of (a). [Figure 6] 1 is an explanatory diagram showing a state in which a tray after X-ray inspection of objects to be inspected is lifted onto a subsequent conveyor. FIG. [Figure 7] 2 is a block diagram showing a control circuit of the X-ray inspection apparatus according to the present invention; [Figure 8] 4 is a flowchart illustrating the operation of the X-ray inspection apparatus according to the present invention. [Figure 9] FIG. 2 is an explanatory diagram showing the stage of carrying an object to be inspected into a shielding box in the operation of the X-ray inspection apparatus according to the present invention. [Figure 10] FIG. 4 is an explanatory diagram showing a stage in which an object to be inspected is fixed to a rotation device in the operation of the X-ray inspection apparatus according to the present invention. [Figure 11] FIG. 2 is an explanatory diagram showing the stage of X-ray irradiation of an object to be inspected in the operation of the X-ray inspection apparatus according to the present invention. [Figure 12] FIG. 4 is an explanatory diagram showing the stage at which irradiation of an object with X-rays is completed in the operation of the X-ray inspection apparatus according to the present invention. [Figure 13] FIG. 4 is an explanatory diagram showing the stage of carrying the object to be inspected out of the shielding box in the operation of the X-ray inspection apparatus according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a perspective view showing a schematic configuration of one embodiment of an X-ray inspection device according to the present invention. This X-ray inspection device inspects an object by irradiating the object with X-rays, and is configured with a shielding box 1, an X-ray source 2, an X-ray sensor unit 3, a rotating device 4, a front-stage conveyor 5, a rear-stage conveyor 6, and a control PC (personal computer) 7.

[0011] The shielding box 1 is a rectangular parallelepiped housing, and has rectangular openings forming an inlet 9 and an outlet 10 for the object 8 to be inspected. Each wall constituting the shielding box 1 is made of an X-ray absorbing material such as lead in order to suppress leakage of X-rays to the outside. Also, the inlet 9 and outlet 10 of the shielding box 1 are provided with a shielding curtain (not shown) in order to prevent X-rays RL as radiation from leaking from inside the shielding box 1 to the outside through the inlet 9 and outlet 10. As this shielding curtain, an arrangement of rectangular lead-containing rubber members can be used.

[0012] An X-ray source 2 is fixedly disposed on the lower side near the center inside the shielding box 1. This X-ray source 2 emits X-rays RL, and irradiates the X-rays RL from an emission portion toward the X-ray sensor unit 3. The X-ray source 2 may be a cold cathode X-ray source of a pulse oscillation type or a hot cathode X-ray source of a CW oscillation type.

[0013] An X-ray sensor unit 3 is fixedly disposed on the upper side near the center of the shielding box 1 so as to face the X-ray source 2. The X-ray sensor unit 3 receives a component of the X-ray RL emitted from the X-ray source 2 that has passed through the object 8 to be inspected, and is, for example, a line sensor in which light receiving elements are arranged in a line extending in one direction. As a result, when the object 8 to be inspected passes through an irradiation area where the X-ray RL is directly incident near the center of the shielding box 1 in a direction intersecting with the long axis of the linear X-ray sensor unit 3, the X-ray RL is irradiated onto the object 8 to be inspected, and the inside of the object 8 to be inspected can be inspected based on the result received by the X-ray sensor unit 3. The direction intersecting with the long axis of the X-ray sensor unit 3 through which the object 8 to be inspected passes is specifically a direction perpendicular to the long axis of the X-ray sensor unit 3 within an allowable range.

[0014] A rotating device 4 is provided in the shielding box 1, positioned outside the irradiation area of ​​the X-rays RL directed from the X-ray source 2 to the X-ray sensor unit 3. The rotating device 4 rotates the object 8 to be inspected about a rotation axis in a direction intersecting with the long axis of the linear X-ray sensor unit 3 within the irradiation area where the X-rays RL are directly incident, and includes a rotating unit 11, a rotating / moving mechanism 12, a fixing mechanism 13, and an airbag device 14, and is configured to be able to move the object 8 to be inspected along the rotation axis while rotating it in a state where it is held. In this case, the moving range of the rotating device 4 is an area outside the irradiation area of ​​the X-rays RL. In detail, the moving range of the rotating device 4 is an area between the irradiation area of ​​the X-rays RL and the rear conveyor 6.

[0015] Here, the rotating part 11 holds the object to be inspected 8 at the center of rotation and slowly moves the object to be inspected 8 along the rotation axis while rotating it, and specifically, is a circular metal or resin member having an opening 15 at the center large enough for the object to be inspected 8 to pass through, and a plurality of teeth are provided at regular intervals on the outer circumferential surface of the member. As a result, by meshing the teeth of the rotating part 11 with the teeth of a gear of a rotating / moving mechanism 12 (described later) that rotates in conjunction with the rotation of the motor 16, the rotational force of the motor 16 can be transmitted to the rotating part 11 via the gear, causing the rotating part 11 to rotate.

[0016] The rotation / movement mechanism 12 rotates the rotating part 11 and moves the rotating part 11 forward and backward along the rotation axis of the rotating part 11. As shown in the image diagram of FIG. 2, it can be realized by combining, for example, a helical gear 17 and an induction gear 18. The helical gear 17 rotates in conjunction with the rotation of the motor 16. As shown in FIG. 3, the helical gear 17 is an elongated gear having a length at least equal to the moving distance of the rotating part 11 and having teeth formed over its entire length. The induction gear 18 is arranged so that its rotation axis is parallel to the rotation axis AX of the rotating part 11 and rotates by meshing with teeth provided on the outer circumferential surface of the rotating part 11. The induction gear 18 is rotatably mounted on a rod-shaped rail 19 with a circular cross section that is arranged parallel to the rotation axis AX of the rotating part 11 and is movable along the rail 19. The induction gear 18 is arranged on the opposite side of the helical gear 17 with respect to the rotation center of the rotating part 11 and rotates by meshing with teeth provided on the outer circumferential surface of the rotating part 11. As shown in FIG. 3, flanges 20 are provided on both end faces of the induction gear 18 so as to sandwich the outer circumferential regions of both end faces of the rotating part 11 from both sides.

[0017] By configuring the rotation / movement mechanism 12 in this way, when the motor 16 is rotated in a forward direction to move the rotating part 11 forward, the rotating part 11 rotates with the rotation of the helical gear 17. At this time, as shown in FIG. 2, a thrust force (forward force) DF in a direction along the rotation axis AX acts on the rotating part 11 together with a rotational force RF. On the other hand, the guide gear 18 rotates with the rotation of the rotating part 11 and guides the rotating part 11 so that the moving direction of the rotating part 11 is a direction along the rail 19. In this way, the rotating part 11 can move forward along the rotation axis AX while rotating around the rotation axis AX. If the rotation direction of the motor 16 is reversed to the forward direction, the rotating part 11 can be rotated in the opposite direction to the above direction and can be moved backward to the movement start position.

[0018] The rotating device 4 is not limited to a configuration including a rotating part 11 having a plurality of teeth on its outer peripheral surface as described above, and a rotating / moving mechanism 12 combining a helical gear 17 and an induction gear 18, but may have any configuration as long as the rotating part 11 can move along the rotation axis AX while rotating around the rotation axis AX.

[0019] The fixing mechanism 13 fixes and holds the object 8 to be inspected on the rotating part 11, and is adapted to fix the front part of a tray 21 (described later) on which the object 8 to be inspected is placed and transported to the rotating part 11 in a transport direction D. In detail, the fixing mechanisms 13 are provided on the left and right of the rotating part 11 at the movement start position of the rotating part 11 so as to be able to hold the front part of the tray 21 in the transport direction D from both sides at the movement start position of the rotating part 11 as shown in FIG. 1. More specifically, the fixing mechanism 13 is adapted to fix the tray 21 to the rotating part 11 by fitting the tip parts of the fixing mechanism 13 provided on the rotating part 11 as shown in FIG. 5(b) into recesses 22 provided on both left and right side surfaces of the front part of the tray 21 in the transport direction D as shown in FIG. 4.

[0020] The airbag device 14 is provided on the upper part of the rotating part 11 at the start position of the rotating part 11, and contains, for example, a cloth airbag and inflates the airbag to press down from above on the object 8 to be inspected on the tray 21 held by the fixing mechanism 13, thereby restricting the movement of the object 8 to be inspected.

[0021] The object 8 to be inspected is carried on the tray 21 as described above. In this case, the front part of the tray 21 in the transport direction D is fixed and held by the fixing mechanism 13 to the rotating part 11. At the same time, the air bag is inflated to press the object 8 to the tray 21. This restricts the object 8 to not move during the rotational movement of the rotating part 11. The object 8 to be inspected may be physically fixed to the tray 21 using a fixing device such as a band, sheet, or net. In this case, the air bag may not be required. It is more preferable to use a sheet that can be fixed by a surface as a fixing device for fixing the object 8 to the tray 21. Preferably, the tray 21 is made of a resin material that easily transmits X-rays RL, such as foam or plastic.

[0022] It is desirable to provide the rotating part 11 with a safety device that issues an alarm and stops the inspection of the object to be inspected 8 when the tray 21 cannot be fixed correctly. As such a safety device, for example, a fitting detection sensor, such as a proximity sensor, that detects the fitting state between the fixing mechanism 13 and the recessed part 22 of the tray 21 is provided in the rotating part 11. In this case, it is desirable to have the control PC 7 judge whether the fixing mechanism 13 is properly fitted into the recessed part 22 of the tray 21 based on a detection signal from the fitting detection sensor, and to issue an alarm and stop the inspection of the object to be inspected 8 when the fitting detection sensor does not detect the fitting.

[0023] Furthermore, power supply to the fixing mechanism 13 provided on the rotating part 11 and reception of the detection signal from the fitting detection sensor may be performed, for example, by contact between a slip ring provided on an end face of the rotating part 11 and a brush provided on the fixed part, which includes a fixed part (not shown) that moves along the rotation axis AX together with the rotating part 11. Alternatively, the power supply may be performed in a non-contact manner by electromagnetic coupling between a power receiving antenna provided on the rotating part 11 and a power transmitting antenna provided on the fixed part.

[0024] A front-stage conveyor 5 is provided on the entrance side of the shielding box 1 for the object 8 to be inspected. The front-stage conveyor 5 carries the object 8 to the shielding box 1 through an entrance 9 of the shielding box 1 in parallel with the rotation axis AX of the rotating device 4 and delivers it to the rotating part 11 of the rotating device 4. The front-stage conveyor 5 is a belt conveyor having a wide loop-shaped belt part 5a stretched over a pair of rollers (not shown), and the belt part 5a is rotated by the rollers being rotated by a front-stage conveyor rotating mechanism 23 (see FIG. 7). The front-stage conveyor rotating mechanism 23 drives the front-stage conveyor 5 under the control of a front-stage conveyor controller 24 (see FIG. 7). In this case, the specific control of the front-stage conveyor controller 24 is, for example, to rotate the belt section 5a at a steady speed when the object to be inspected 8 is placed on the belt section 5a at a predetermined placement position of the front-stage conveyor 5, and to stop or rotate the belt section 5a at a slow speed when the object to be inspected 8 is handed over to the rotating section 11 of the rotating device 4.

[0025] Here, as shown in FIG. 1, a support plate 25 is provided on the end side of the shielding box 1 of the front-stage conveyor 5. This support plate 25 serves as a bridge for transferring the object 8 to be inspected from the front-stage conveyor 5 to the rotating part 11 of the rotating device 4. When a detection unit 26 such as a photosensor provided on the rotating part 11 detects that the object 8 to be inspected has been transferred to the rotating part 11, the support plate 25 rotates around an axis provided on the end side of the front-stage conveyor 5 in parallel along the edge of the end, and releases the support of the object 8 to be inspected. In this embodiment, as shown in FIG. 1, a case will be described in which the detection unit 26 is provided at a position corresponding to the fixing mechanism 13 of the rotating part 11. However, the mounting position of the detection unit 26 is not limited thereto, and the detection unit 26 may be provided at any position as long as the completion of the transfer of the object 8 to the rotating part 11 can be detected.

[0026] A rear-stage conveyor 6 is provided on the discharge side of the shielding box 1 for the object 8 to be inspected. This rear-stage conveyor 6 receives the object 8 to be inspected after the X-ray inspection from the rotating part 11 of the rotating device 4, and discharges it to the outside of the shielding box 1 through the discharge port 10 of the shielding box 1, and is configured similarly to the front-stage conveyor 5. In detail, as shown in FIG. 6, it is a belt conveyor in which a wide belt part 6a in a loop shape is stretched over a pair of rollers 27, and the belt part 6a is rotated by rotating the rollers 27 by a rear-stage conveyor rotating mechanism 28 (see FIG. 7). In more detail, as shown in FIG. 6, a protrusion 29 is provided on the surface of the belt part 6a of the rear-stage conveyor 6, and the protrusion 29 is engaged with a leg part 30 (see FIG. 4) provided on the back surface of the tray 21 as the belt part 6a rotates, so that the tray 21 can be lifted up onto the belt part 6a. The rear-stage conveyor rotation mechanism 28 is controlled by a rear-stage conveyor controller 31 (see FIG. 7) to drive the rear-stage conveyor 6. In this case, the specific control of the rear-stage conveyor controller 31 is to rotate the belt portion 6a at a steady speed when, for example, the X-ray inspection of the object 8 by the rotation device 4 is completed and the fixation of the tray 21 and the object 8 to be inspected is released, and to stop the belt portion 6a when the object 8 to be inspected is collected from the belt portion 6a at a predetermined collection position.

[0027] The front-stage conveyor 5 and the rear-stage conveyor 6 are not limited to belt conveyors and may be roller conveyors or the like, but the following description will be given assuming that the conveyors are belt conveyors.

[0028] 7, a control PC 7 is provided, electrically connected via a control board 32 to the front-stage conveyor rotation mechanism 23, front-stage conveyor controller 24, rear-stage conveyor rotation mechanism 28, rear-stage conveyor controller 31, rotation device 4, detection unit 26, airbag device 14, X-ray source 2, and X-ray sensor unit 3. This control PC 7 controls the entire X-ray inspection apparatus so that the entire apparatus operates appropriately, and controls the operation of each unit according to a preset program.

[0029] Next, the operation of the X-ray inspection apparatus configured in this manner will be described with reference to the flow chart of FIG. 8 and FIGS. First, a tray 21 carrying an object 8 to be inspected is placed on the belt section 5a at a predetermined placement position of the front-stage conveyor 5 (step S1). This is detected by a sensor (not shown) provided at the placement position, and the front-stage conveyor rotation mechanism 23 is driven under the control of the front-stage conveyor controller 24, causing the belt section 5a to rotate at a steady speed. Then, the object 8 to be inspected is transported by the front-stage conveyor 5 toward the shielding box 1 (step S2).

[0030] The trays 21 and the objects to be inspected 8 transported by the front-stage conveyor 5 are carried into the shielding box 1 through the carry-in entrance 9 of the shielding box 1, as shown in Fig. 9. At this time, the surface of the support plate 25 provided on the end side of the front-stage conveyor 5 inside the shielding box 1 is kept approximately flush with the transport surface of the belt portion 5a of the front-stage conveyor 5 by an electric mechanism (not shown).

[0031] Next, the rear end of the tray 21 carrying the object 8 to be inspected is pushed by the front conveyor 5 in the conveying direction D, and slides forward on the support plate 25. Then, when the front part of the tray 21 in the conveying direction D reaches the rotating part 11 of the rotating device 4 (step S3), the detector 26 provided in the rotating part 11 detects it and activates the fixing mechanism 13, and the front part of the tray 21 is fixed to the rotating part 11 by this fixing mechanism 13. At this time, the front conveyor 5 is controlled by the front conveyor controller 24 to be stopped. At the same time, as shown in FIG. 10, a predetermined amount of air is injected into the air bag 33 from the air bag device 14 provided in the rotating part 11, and the air bag 33 is inflated to press the object 8 to the tray 21. This completes the fixing of the object 8 to the rotating part 11 (step S4).

[0032] 11, when the fixing of the object 8 to the rotating unit 11 is completed, the electric mechanism of the support plate 25 is turned off, and the support plate 25 rotates around an axis provided parallel to the edge of the end inside the shielding box 1 of the front-stage conveyor 5 and hangs down. At the same time, X-rays RL are emitted from the X-ray source 2 toward the X-ray sensor unit 3, and X-ray inspection of the object 8 is started (step S5). As a result, the components of the X-rays RL emitted from the X-ray source 2 that have passed through the tray 21 and the object 8 to be inspected are received by the X-ray sensor unit 3, and the contents of the object 8 to be inspected are photographed.

[0033] As shown in FIG. 2, the rotating part 11 of the rotating device 4 has teeth provided at regular intervals on its outer circumferential surface meshing with the teeth of the helical gear 17 of the rotating / moving mechanism 12, and starts to rotate with the rotation of the motor 16. At the same time, the rotating part 11 meshes with the teeth of the guide gear 18 provided on the opposite side of the helical gear 17 across the rotation axis AX, and is guided along the rail 19 that supports the guide gear 18 rotatably and movably, as shown in FIG. 3, and slowly advances parallel to the rotation axis AX toward the rear conveyor 6 (step S6). As a result, the object 8 to be inspected is X-rayed while rotating and advancing in a spiral shape with the rotation axis AX in a direction intersecting the long axis of the linear X-ray sensor unit 3 within the irradiation area where the X-ray RL is directly incident, and a CT image of the contents of the object 8 to be inspected is obtained. This CT image is displayed as a three-dimensional image on the display of the control PC 7, and the contents of the object 8 to be inspected by an inspector without contact.

[0034] 12, when the rotating device 4 reaches the end of its moving range (the end in the conveying direction D), the X-ray irradiation ends and the photographing of the inspection object 8 is completed (step S7). Then, the rotation of the inspection object 8 by the rotating unit 11 is stopped (step S8). The irradiation of the X-rays RL may be performed by controlling the X-ray source 2 to be turned on and off, or may be performed by using a shutter to turn it on and off.

[0035] When the rotating device 4 reaches the end of its moving range, the front end of the tray 21 in the conveying direction D rides up onto the end of the shielding box 1 of the rear conveyor 6. The air in the air bag 33 is removed by the air bag device 14, and the pressure applied by the air bag 33 to the object 8 to be inspected is released. At the same time, the fixing mechanism 13 provided on the rotating part 11 is turned off to release the fixing of the tray 21 (step S9). In this case, another support plate extending in the opposite direction to the conveying direction D in parallel with the rotation axis AX of the rotating device 4 may be provided on the end side of the shielding box 1 of the rear conveyor 6 to support the released tray 21 from below.

[0036] When the fixing of the tray 21 and the object 8 to be inspected by the rotating unit 11 is released, the rear conveyor rotation mechanism 28 is driven by the rear conveyor controller 31, and the belt portion 6a of the rear conveyor 6 starts to rotate at a steady speed. As a result, as shown in FIG. 6, the leg portion 30 provided at the front end of the rear surface of the tray 21 in the conveying direction D engages with the protrusion 29 provided on the surface of the belt portion 6a of the rear conveyor 6, and the tray 21 is lifted up onto the belt portion 6a. Thereafter, as shown in FIG. 13, the tray 21 carrying the object 8 to be inspected is carried out of the shielding box 1 by the rear conveyor 6 through the carry-out opening 10 of the shielding box 1. Then, when the tray 21 carrying the object 8 to be inspected reaches a predetermined collection position of the rear conveyor 6, a sensor (not shown) detects this and the rear conveyor 6 is stopped (step S10). As a result, the tray 21 and the object 8 to be inspected are collected from the rear-stage conveyor 6 (step S11), and the X-ray inspection of the inside of the object 8 to be inspected by the X-ray inspection device is completed.

[0037] When the delivery of the inspection object 8 to the rear conveyor 6 is completed, the rotation / movement mechanism 12 of the rotation device 4 is rotated in the reverse direction and returned to the movement start position. The support plate 25 is held horizontally by turning on the electric mechanism and waits until the next inspection object 8 is transported.

[0038] According to the present invention, when the object 8 to be inspected passes through the X-ray irradiation area, the rotating device 4 is configured to rotate the object 8 to the rotation axis AX parallel to the transport direction D of the object 8 to be inspected, so that the configuration of the rotating device 4 is simpler than that of a conventional X-ray inspection device that rotates a gantry. Therefore, it is possible to realize a small-sized, low-cost X-ray inspection device that enables CT inspection of the contents of the object 8 to be inspected.

[0039] In the above embodiment, the rotating device 4 is of a helical scan type in which the rotating part 11 advances while rotating in a spiral while holding the object to be inspected 8, but the present invention is not limited to this, and the rotating device 4 may be of a type in which the rotating part 11 moves in a step each time the object to be inspected 8 rotates once. Furthermore, the rotating device 4 may tilt the object to be inspected 8 by a predetermined angle around the rotation axis AX during X-ray imaging. In the present invention, the concept of "rotation" also includes the case of tilting the object to be inspected by a predetermined angle around the rotation axis AX as described above.

[0040] Furthermore, in the above embodiment, an X-ray inspection apparatus has been described, but the present invention is not limited to this. The object 8 to be inspected may be baggage, and the baggage inspection apparatus may have the functions of the above-mentioned X-ray inspection apparatus.

[0041] The above-mentioned embodiment is merely a schematic illustration of the present invention so that the present invention can be understood and practiced, and the present invention is not limited thereto. The present invention can be modified and altered in various ways without departing from the scope of the technical ideas set forth in the claims. [Explanation of symbols]

[0042] 1…Shielding box 2...X-ray source (radiation source) 3...X-ray sensor part (radiation sensor part) 4. Rotating device 5...Pre-stage conveyor (pre-stage transport device) 6... Rear conveyor (rear transport device) 8...Item to be inspected 21…Tray RL…X-rays (radiation) AX: Rotating shaft of rotating device D: Transport direction of the inspection object

Claims

1. a front-stage conveying device that conveys a tray carrying the objects to be inspected into a shielding box; a radiation source disposed in the shielding box and configured to irradiate an object to be inspected with radiation; a linear radiation sensor unit that is disposed within the shielding box and receives a component of the radiation from the radiation source that has passed through the object to be inspected and the tray; a rotation device that is arranged within the shielding box, holds the object to be inspected and the tray in a rotation unit, and causes the rotation unit holding the object to be inspected and the tray to pass through an irradiation area where the radiation is directly incident by rotating the object to be inspected about a rotation axis that intersects with a major axis of the linear radiation sensor unit and moving along the rotation axis; a downstream conveying device that receives the object to be inspected and the tray from the rotating device and conveys the tray on which the object to be inspected is placed out of the shielding box; A radiological inspection device equipped with the above-mentioned.

2. 2. The radiation inspection apparatus according to claim 1, wherein the rotation axis of the rotation device is an axis parallel to a conveying direction of the tray carrying the object to be inspected to the shielding box.

3. 3. The radiological inspection apparatus according to claim 1, wherein the rotating device is configured to fix the tray to the rotating section and to press the object to be inspected against the tray to restrict the object from moving.

4. 4. The radiation inspection apparatus according to claim 1, wherein the object to be inspected is fixed to the tray using a fixture.

5. 5. The radiation inspection apparatus according to claim 1, wherein the radiation emitted by the radiation source is an X-ray.

6. A baggage inspection device comprising the radiation inspection device according to any one of claims 1 to 5, for inspecting baggage as an object to be inspected.

Images