JP3927564B2 - X-ray foreign object detection device - Google Patents

Description

  The present invention provides an X-ray foreign object detection apparatus that irradiates a subject conveyed in a pipeline with X-rays at a predetermined detection position and detects foreign matter mixed in the subject based on the amount of transmission. In particular, the present invention relates to an X-ray foreign object detection apparatus that can easily attach and detach a detection pipe that performs X-ray foreign object detection.

  Conventionally, for example, an X-ray foreign matter detection apparatus has been used to detect foreign matter (metal, glass, shell, bone, etc.) mixed in a subject such as food. There are several means for transporting this X-ray foreign object detection device, depending on the type of subject. For example, for transporting shellfish such as clams, fish surimi, retort food ingredients, and soup with ingredients. Generally, a pipeline is used. These subjects are fluidly transported along with the transport fluid in the pipeline. In addition, for example, a soup containing ingredients is a mixture of a fluid and a solid, and the subject itself has fluidity, so that only the subject is fluidly conveyed into the pipeline without using a fluid for transportation.

As an example of the X-ray foreign matter detection apparatus using the pipeline as described above as a conveying means, there is one disclosed in Patent Document 1 below. As shown in FIG. 9, this X-ray foreign object detection apparatus has an X-ray inspection unit 116, and the X-ray inspection unit 116 includes a subject (shell debris 110, shells, metal pieces, and other foreign substances and a transport object). Fluid 112) is supplied through a pipeline 114 from a supply tank (not shown). In the X-ray inspection unit 116, X-rays irradiated from the X-ray generation tube 118 are irradiated to the subject at a predetermined timing through a pipeline 120 communicating with the downstream side of the pipeline 114. Then, X-rays transmitted through the subject are measured by X-ray sensors 122 and 124 arranged in a plurality in the direction crossing the pipeline 120 at regular intervals. Here, when a foreign substance detection signal is output from a signal processing unit (not shown) based on the measurement results of the X-ray sensors 122 and 124, the discharge valve 128 is operated to guide the subject containing the foreign substance to the pipeline 130. Discharged.
Japanese Patent No. 2591171

  By the way, in this kind of X-ray foreign material detection apparatus, since the subject remains in the pipeline in a short time, it is necessary to frequently clean the pipeline. In particular, the portion of the pipeline that is disposed in the housing needs to be cleaned most because foreign matter is detected by X-rays, and in addition, reliable cleaning is desired.

  However, in the conventional X-ray foreign object detection device, the pipeline is cleaned by flowing a cleaning fluid such as water or air inside. However, this may result in insufficient cleaning of the portion corresponding to the detection position requiring the most cleaning. Further, the pipeline disclosed in the above-mentioned Patent Document 1 is not a structure that can be easily attached to and detached from the casing, but the pipeline corresponding to the detection position disposed in the casing is separated from the pipeline. Another possible method is to remove it from the housing, clean it outside the housing, and attach it to the housing again. In this case, it is necessary to perform the attaching / detaching work while maintaining the state in which the pipeline is arranged in the casing, which is very complicated. Furthermore, since it is not very preferable from the viewpoint of safety to put a hand in the case and to perform the attachment / detachment work, it is further complicated that it is necessary to attach / detach the pipeline outside the case as much as possible.

  Therefore, the present invention has been made in view of the above situation, and a detection pipe disposed in a casing and corresponding to a detection position in a pipeline can be easily attached to and detached from the casing. An object of the present invention is to provide an X-ray foreign object detection device capable of easily and reliably cleaning a pipe.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The X-ray foreign object detection apparatus according to claim 1 of the present invention irradiates a subject transported in the pipeline 6 with X-rays at a predetermined detection position P in the housing 2 and applies this X-ray irradiation. In the X-ray foreign matter detection apparatus 1 that detects X-rays transmitted through the subject and detects the presence or absence of foreign matter in the subject based on the detected amount of transmitted X-rays.
The casing 2 is provided with an opening 4 provided with doors 5 that can be opened and closed in the vertical direction on the front surface while the pipeline 6 is penetrated on both sides.
A detection pipe 6c that constitutes a part of the pipeline 6 and is detachably provided with the pipeline 6 and disposed in the opening 4,
A holding member 21 holding the detection pipe 6c in the opening 4;
A moving mechanism 20 for moving the detection pipe 6c and the holding member 21 to the outside of the opening 4,
The moving mechanism 20,
A support member 50 which is detachably supported in front Symbol holding member 21, and a guide member 55 that is movably ligated in the direction Z perpendicular to the support member 50 and the conveying direction Y of the subject , And provided on the outer sides of both side surfaces of the casing (2) .

  According to such a configuration, since the detection pipe 6c can be attached to and detached from the pipeline 6, the portion of the pipeline 6 corresponding to the detection position P that requires the most cleaning is reliably cleaned. It becomes possible.

  Further, since the detection pipe 6 c is held by the holding member 21, the detection pipe 6 c can be stabilized in the opening 4. Furthermore, the detection pipe 6c held by the holding member 21 is maintained at a constant height and orientation by the support member 50, so that the detection pipe 6c can be accurately disposed in the opening 4. . Further, since the detection pipe 6c is detachably supported outside the opening 4, the detection pipe 6c can be attached and detached without putting a hand or the like into the opening 4. That is, the detection pipe 6c can be attached and detached easily and safely. Furthermore, since the support member 50 can be moved by the guide member 55 in the direction Z perpendicular to the transport direction, the operator can pull out the support member 50 to a position where it can be easily attached and detached. Thereby, attachment / detachment of the detection pipe 6c is further facilitated.

Claim 2 X-ray foreign material detecting apparatus described, near both ends of the detection pipe 6c, the both side surfaces of the housing 2 in the positional states of within the opening 4 of the detection pipe 6c the opening 4 A shielding plate 40 having a notch 42 matching the diameter of the detection pipe 6c is attached so as to be shielded.

  According to such a configuration, both sides of the opening 4 are shielded by the shielding plate 40, and the front surface of the opening 4 is shielded by the door 5, thereby preventing X-rays from leaking out of the opening 4. Further, since the shielding plate 40 is attached to the detection pipe 6c, it is necessary to secure a path for the detection plate 6c to pass through the shielding plate 40 even if the detection pipe 6c is configured to be movable. Instead, it is possible to expose only the detection pipe 6c on both side surfaces of the opening 4. That is, even if the movable detection pipe 6c is used, the opening 4 can be shielded, and leakage of X-rays outside the opening 4 can be prevented.

The X-ray foreign object detection device according to claim 3, wherein the holding member 21 is opposed to the placement portion 22 on which the detection pipe 6 c is placed and the placement portion 22 through the detection pipe 6 c. And an upper plate 28 arranged,
The mounting portion 22 and the upper plate 28 are connected to each other with the detection pipe 6c sandwiched from above and below.

  According to such a configuration, the detection pipe 6 c is securely held by the holding member 21. Thereby, the detection pipe 6c is stably disposed in the opening 4, and for example, it is possible to prevent the detection pipe 6c from vibrating due to the subject flowing inside. Therefore, foreign object detection by X-rays is performed more accurately.

  According to the X-ray foreign matter detection apparatus of the first aspect of the present invention, it is possible to reliably clean the portion corresponding to the detection position requiring the most cleaning in the pipeline.

  Further, the detection pipe can be stabilized in the opening, and the detection pipe can be accurately arranged in the opening. Further, since the detection pipe is detachably supported outside the opening, the detection pipe can be attached and detached without putting a hand or the like into the opening. That is, the detection pipe can be easily and safely attached and detached. Furthermore, since the support member can move in a direction perpendicular to the transport direction, the operator can pull out the support member to a position where it can be easily attached and detached. This makes it easier to attach and detach the detection pipe.

  According to the X-ray foreign object detection device of the second aspect, leakage of X-rays outside the opening can be prevented. Even if the detection pipe is configured to be movable, both side surfaces of the opening can be shielded.

  According to the X-ray foreign object detection device of the third aspect, the detection pipe can be stably disposed in the opening.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a schematic front view showing an appearance of an embodiment of an X-ray foreign matter detection apparatus according to the present invention, and FIG. 2 is a plan view thereof.

  The X-ray foreign object detection apparatus according to this embodiment is provided in a part of a production line, for example, for various foods such as peeled shellfish such as clams, fish surimi, retort food ingredients, and soup containing ingredients. As described above, foreign substances such as metal, glass, shells and bones mixed in the specimen are detected by continuously flowing in the pipeline.

  Note that the above-described subject is, for example, shellfish such as clams, fish surimi, retort food ingredients, and the like, which are fluidly transported in a pipeline together with transport fluid such as water and air. On the other hand, ingredients-containing soup and the like are fluidly transported as they are in a pipeline because they are mixed with a fluid and have a fluidity.

  As shown in FIGS. 1 and 2, the X-ray foreign object detection device 1 has a box-shaped housing 2 and is supported on the installation surface by legs 3. In addition, the housing 2 is provided with an opening 4 that is open at the front and penetrates the left and right side surfaces. A door 5 that shields the front surface of the opening 4 in a closed state is provided on the front surface of the opening 4. Further, a pipeline 6 (described later) is disposed in the opening 4 so as to penetrate the housing 2 from side to side.

  As shown in FIG. 2, the above-described pipeline 6 is formed by connecting a plurality of pipes, and flows a specimen supplied from a supply tank (not shown) installed on the upstream side of the housing 2 to the downstream side. Transport. The pipeline 6 is branched in a plurality of directions (two directions in FIG. 2) between the housing 2 and a non-defective product (or defective product) storage tank 7. In FIG. 2, a subject, that is, a non-defective product, in which no foreign matter has been detected by the detection unit 10 described later flows in one pipeline 6 a extending in the same direction as the subject transport direction Y in the opening 4 of the housing 2. Be transported. In addition, in the other pipeline 6b orthogonal to the transport direction Y, the specimen in which foreign matter is detected, that is, a defective product is fluidly transported. A branch valve portion 8 is provided at the branch position of the pipeline.

  The branch valve section 8 has a branch valve (not shown) inside, and can switch the flow path according to the detection result from the detection section 10. Normally, the branch valve unit 8 opens one pipeline 6a, but when a foreign substance is detected in the subject by the detection unit 10, one pipeline 6a is closed at a predetermined timing and the other pipeline is simultaneously closed. 6b is opened, and a subject containing foreign matter is discharged as a defective product to a defective product storage tank (not shown).

  Further, a detection pipe 6 c that constitutes a part of the above-described pipeline 6 is disposed in the opening 4 of the housing 2, and is connected to another pipeline 6 outside the housing 2. In the present embodiment, the detection pipe 6c is made of resin or the like as a material.

  As shown in FIGS. 1 and 2, the detection unit 10 described above is provided inside the housing 2. The detection unit 10 is for detecting foreign matter mixed in a subject that is flow-conveyed in the detection pipe 6c at a predetermined detection position P in the opening 4, and is used as an X-ray irradiation unit. A generator 11 and an X-ray detector 12 as X-ray detection means are provided.

  The X-ray generator 11 is installed at a predetermined position above the detection pipe 6c. In the X-ray generator 11, an X-ray tube for generating X-rays in a metal box is immersed in insulating oil, and the X-rays are irradiated downward (detection pipe 6c). The form of X-rays emitted from the X-ray generator 11 is a surface shape orthogonal to the longitudinal direction (conveying direction Y) of the detection pipe 6c, and the surface has a substantially triangular shape extending downward.

  The X-ray detector 12 is provided on the bottom surface in the opening 4 below the detection pipe 6c. In the X-ray detector 12, a plurality of elements are linearly arranged in a direction orthogonal to the longitudinal direction (conveying direction Y) of the detection pipe 6c. These elements are constituted by a photodiode and a scintillator disposed on the photodiode. The position where the X-ray detector 12 is provided in the opening 4 is the detection position P in the apparatus 1.

  In the detection unit 10 having such a configuration, X-rays are irradiated from the X-ray generator 11 to the subject that is continuously flow-conveyed in the detection pipe 6c. X-rays that pass through the subject with this irradiation are converted into light by the scintillator of the X-ray detector 12. The light converted by the scintillator is received by a photodiode, further converted into an electrical signal and output. Then, the output from the X-ray detector 12 is compared with a predetermined threshold value for each type of foreign matter, and the presence or absence of foreign matter mixed in the subject is detected based on the result.

  The X-ray foreign object detection device 1 of this embodiment is provided with a moving mechanism 20 that moves the detection pipe 6c in a direction Z orthogonal to the transport direction Y when the device 1 is stopped.

  3A is a front view showing a state in which a holding member is attached to a detection pipe that constitutes an embodiment of the X-ray foreign matter detection apparatus according to the present invention, FIG. 3B is a plan view thereof, and FIG. FIG. 5 is a front view showing a state before movement of a moving mechanism constituting an embodiment of the X-ray foreign object detection device according to the present invention, FIG. 5 is a side view thereof, and FIG. 6 is a front view showing a state during movement of the moving mechanism. FIG. 7 is a side view of the same, and FIG. 8 is a front view showing a state in which the detection pipe and the shielding plate held by the holding member are removed from the moving mechanism.

First, the holding member 21 holding the detection pipe 6c in the opening 4 of the housing 2 will be described.
As shown in FIGS. 3A and 3B, the holding member 21 is substantially constituted by a placement portion 22 and an upper plate 28.

  As shown in FIGS. 3A and 3B, the mounting portion 22 is made of a substantially rectangular plate material that is long in the transport direction Y, and the X-ray detector 12 is exposed at the center in the installed state. In addition, a substantially rectangular slit 23 is provided in a direction Z orthogonal to the transport direction. In addition, side plates 24 and 24 are bent vertically upward on both sides along the transport direction Y of the mounting portion. Further, end plates 25 and 25 are bent vertically downward at both ends in the transport direction Y, and hooks 26 and 26 are provided on the both end plates 25 and 25, respectively. Further, a substantially L-shaped wing piece 27 having a small width portion 27a and a large portion 27b is provided at the upper ends of the both side plates 24, 24, which are separated to the left and right in the transport direction Y of the both side plates 24, 24, respectively. Is provided. Each wing piece 27, 27 is arranged with the narrow portion 27a facing away from the detection position P from the large portion 27b.

  As shown in FIGS. 3A and 3B, the upper plate 28 is made of a plate material that is long in the transport direction Y, and is configured as a pair. Upright portions 29a, 29a, 29b, and 29b are bent vertically upward at both ends of the upper plates 28 and 28 in the transport direction Y, respectively. These upper plates 28 and 28 are arranged on the detection pipe 6c so that their longitudinal directions are arranged along the transport direction Y and are opposed to each other with the detection position P interposed therebetween. The upper plates 28 and 28 are provided with arm portions 30 and 30, respectively. The arm portion 30 has a substantially U-shaped cross section in which a plate material is bent, one end is fixed to the upper plate 28, and the other end forms a receiving portion 31. The arm portion 30 is provided in the vicinity of one end portion in the transport direction Y of the upper plate 28, and is provided to face both side portions along the transport direction Y.

  The holding member 21 described above is attached so as to hold the detection pipe 6c by sandwiching the detection pipe 6c vertically between the mounting portion 22 and the upper plate 28.28. Here, as a method of connecting the mounting portion 22 and the upper plate 28, in the present embodiment, the receiving portions 31, 31 of the arm portions 30, 30 are gripped from the outside by the narrow portion 27 a of the wing piece 27. Connect. Then, the holding portions 32, 32 provided in the opening 4 are engaged with the upright portions 29 a, 29 a that are inside the upper plates 28, 28. In addition, the connection method of the mounting part 22 and the upper boards 28 and 28 is not limited to this, For example, it is good also as a structure with which the mounting board 22 and the upper boards 28 and 28 are connected with a volt | bolt etc. . Further, the inner sides of the upper plates 28 and 28 may be engaged by the pressing portion 32, and a bolt may be used only on the outer side.

Further, a pair of shielding plates 40, 40 are attached to the detection pipe 6c.
As shown in FIGS. 4 and 5, the shielding plate 40 is formed in a substantially L-shaped cross section, and the longitudinal direction extends in a direction Z orthogonal to the transport direction. Further, a balanced portion 41 having a substantially L-shaped cross section is provided on the bent upper portion of the shielding plate 40. When the shielding plate 40 is attached to the detection pipe 6c, the shielding plate 40 is placed on the detection pipe 6c. It is stabilized with. Further, a notch 42 is formed in the lower center of the shielding plate 40 so as to match the diameter of the detection pipe 6c. Thereby, when the detection pipe 6c is installed in the opening 4, only the detection pipe 6c is exposed from both side surfaces of the opening 4, and the other opening portions are shielded.

Next, the moving mechanism 20 that moves the detection pipe 6c held by the holding member 21 will be described.
As shown in FIGS. 4 to 7, the moving mechanism 20 is substantially constituted by a support member 50 and a guide member 55.

  As shown in FIGS. 4 and 6, the support member 50 is formed in a substantially rectangular column shape, and is disposed in pairs on both outer side portions of the housing 2. Both the supporting members 50 and 50 are connected to each other below the housing 2 by a connecting member 51. Further, a catch clip 52 as an attaching / detaching means is provided on the upper outer surface of the support member 50, and is detachably engaged with the hook 26 of the mounting portion 22 described above. Furthermore, as shown in FIGS. 5 and 7, an engaging portion 53 having a substantially U-shaped cross section extending in a direction Z orthogonal to the transport direction is provided at the lower portion of the support member 50. The engaging portion 53 extends from the support member 50 to the door side (front side) in the direction Z orthogonal to the transport direction, and extends to the back side (rear side). A liner portion 54 made of a rotating body is provided in the engaging portion 53, and is slidably engaged with a guide member 55 described later. Further, the support member 50 is releasably fixed to the side surface of the housing 2 at the use position.

  As shown in FIGS. 4 to 7, the above-described guide member 55 is composed of a guide rail having a substantially C-shaped cross section, and is provided in pairs on both outer side portions in the upper portion of the leg portion 3, and the longitudinal direction is the transport direction. And extending in a direction Z orthogonal to. As described above, the guide rail 55 as the guide member moves the support member 50 to be slidable in the direction Z orthogonal to the transport direction. The guide rail 55 is provided with a stopper (not shown) so that when the support member 50 slides, the guide rail 55 moves to a predetermined position or more so as not to be removed.

From here, the procedure for removing the detection pipe 6c from the housing 2 will be described.
First, the detection pipe 6 c connected to the pipeline 6 outside the housing 2 is separated from the pipeline 6.
Next, as shown in FIGS. 4 and 5, the door 5 shielding the front surface of the opening 4 is opened. At this time, the door 5 opens in the vertical direction (downward in the present embodiment).
Next, although not shown, the detection member 6c held by the holding member 21 is supported by releasing the fixation between the support member 50 and the side surface of the housing 2 as shown in FIGS. The supporting member 50 can be slid in the direction of the arrow in FIG. 7 and pulled out to a predetermined pipe removal position on the front side. At this time, the shielding plate 40 remains attached to the detection pipe 6c (and the holding member 21).
Next, as shown in FIG. 8, the catch clip 52 is removed, the fixing of the support member 50 and the detection pipe 6c (and the holding member 21) is released, and the detection pipe 6c (and the holding member 21) is removed. Then, the shielding plate 40 is removed from the detection pipe 6c. In the present embodiment, the holding member 21 firmly holds the detection pipe 6c by being engaged with the presser 32 in the opening 4, but here, the presser 32 is disengaged. Thus, the mounting portion 22 and the upper plate 28 are temporarily fixed, and can be easily detached from the detection pipe 6c. This completes the removal of the detection pipe 6c from the housing 2.

  Note that the above-described removal work of the detection pipe 6c is performed when the X-ray foreign object detection apparatus 1 is stopped. When the detection pipe 6c is installed in the opening 4 of the housing 2, the above procedure may be reversed.

  Furthermore, in the present embodiment, the entire pipeline 6 including the detection pipe 6c does not use a material that has a slight shape restoring property but significantly changes its shape. Therefore, the operation of separating the detection pipe 6c from the pipeline 6 must be performed first in the above procedure. However, for example, by using a flexible pipe made of a flexible material for the pipes connected to both ends of the detection pipe 6c, the detection pipe 6c is pulled out to the front side and then separated from the pipeline 6. It becomes possible. Thereby, the operation of separating the detection pipe 6c from the pipeline 6 can be performed at a position suitable for the operator.

  According to this embodiment, since the detection pipe 6c is attachable to and detachable from the pipeline 6, the portion corresponding to the detection position P requiring the most cleaning in the pipeline 6 is surely cleaned. It becomes possible. In addition to this, for example, the detection pipe 6c deteriorated by the X-ray irradiation can be easily replaced.

  Further, since the detection pipe 6 c is held by the holding member 21, the detection pipe 6 c can be stabilized in the opening 4. Furthermore, the detection pipe 6c held by the holding member 21 is maintained at a constant height and orientation by the support member 50, so that the detection pipe 6c can be accurately disposed in the opening 4. . Further, since the detection pipe 6c is detachably supported by the support member 50 and the catch clip 52 outside the opening 4, the detection pipe 6c can be attached and detached without putting a hand or the like into the opening 4. The detection pipe 6c can be easily detached from the support member 50. That is, the detection pipe 6c can be attached and detached easily and safely. Furthermore, since the support member 50 can be moved by the guide rail 55 in the direction Z perpendicular to the transport direction, the operator can pull out the support member 50 to a position where it can be easily attached and detached. Thereby, attachment / detachment of the detection pipe 6c is further facilitated.

  Further, since the shielding plate 40 is attached to the detection pipe 6c, even if the detection pipe 6c is configured to be movable, it is necessary to secure a path for the detection pipe 6c to pass through the shielding plate 40. Instead, it is possible to expose only the detection pipe 6c on both side surfaces of the opening 4. That is, even if the movable detection pipe 6c is used, the opening 4 can be shielded, and leakage of X-rays outside the opening 4 can be prevented.

  Further, the detection pipe 6 c is stably disposed in the opening 4 by being sandwiched and held between the placing portion 22 and the upper plates 28 and 28. For example, the detection pipe 6c can be prevented from vibrating due to the subject flowing inside, and foreign matter detection by X-rays can be performed more accurately.

1 is a schematic front view showing an appearance of an embodiment of an X-ray foreign object detection device according to the present invention. It is the same top view. (A) It is a front view which shows the state by which the holding member was attached to the pipe for a detection which comprises one Embodiment of the X-ray different detection apparatus by this invention. (B) It is the same top view. It is a front view which shows the state before the movement of the moving mechanism which comprises one Embodiment of the X-ray foreign material detection apparatus by this invention. It is the same side view. It is a front view which shows the state in the middle of the movement of the moving mechanism which comprises one Embodiment of the X-ray foreign material detection apparatus by this invention. It is the same side view. It is a front view which shows the state which removed the detection pipe and the shielding board which were hold | maintained at the holding member from the moving mechanism which comprises one Embodiment of the X-ray foreign material detection apparatus by this invention. It is a schematic front view (partial cross section) which shows the conventional X-ray foreign material detection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... X-ray foreign material detection apparatus 2 ... Housing 4 ... Opening 5 ... Door 6 ... Pipeline 6c ... Detection pipe 20 ... Moving mechanism 21 ... Holding member 22 ... Mounting part 28 ... Upper plate 40 ... Shielding plate
42 ... Notch 50 ... Support member 55 ... Guide member (guide rail)
P: Detection position Y: Transport direction Z: Direction orthogonal to the transport direction

Claims (3)

A subject transported in the pipeline (6) is irradiated with X-rays at a predetermined detection position (P) in the housing (2), and passes through the subject along with the irradiation of the X-rays. In the X-ray foreign matter detection device (1) for detecting the coming X-ray and detecting the presence or absence of foreign matter in the subject based on the detected transmission amount of the X-ray,
The casing is provided with an opening (4) provided with a door (5) that can be opened and closed in the vertical direction on the front side while the pipeline is penetrated on both sides.
A detection pipe (6c) that constitutes a part of the pipeline and is detachably attached to the pipeline, and is disposed in the opening;
A holding member (21) holding the detection pipe in the opening;
A moving mechanism (20) for moving the detection pipe and the holding member out of the opening;
The moving mechanism,
A support member that is detachably supported the previous SL holding member (50), wherein the supporting member subject transporter direction (Y) perpendicular to the direction (Z) guide part are capable ligated moved to (55) and a said housing X-ray foreign material detecting apparatus according to claim each be provided on the outside of both sides of. In the vicinity of both ends of the detection pipe, there is a notch that matches the diameter of the detection pipe so as to shield the opening on both side surfaces of the housing in a state in which the detection pipe is disposed in the opening. 2. The X-ray foreign object detection device according to claim 1, wherein a formed shielding plate (40) is attached. The holding member includes a placement portion (22) on which the detection pipe is placed, and an upper plate (28) disposed to face the placement portion via the detection pipe,
The X-ray foreign matter detection device according to claim 1 or 2, wherein the placing portion and the upper plate are connected to each other with the detection pipe sandwiched from above and below.

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