JP2022034239A - Appearance confirmation device for radioactive waste storage container and appearance confirmation structure for radioactive waste storage container - Google Patents

Abstract

To provide an appearance confirmation device for radioactive waste storage container easy-to-insert into the gap between radioactive waste storage containers capable of suppressing overexposure of camera image, and an appearance confirmation structure for the radioactive waste storage containers.SOLUTION: An appearance confirmation device 10 includes: a flat plate-shaped housing 20; a camera 70; a light source 80; and an optical fiber 90. The optical fiber 90 has first portions 91, 92 extending along a pair of first side edges 22 of the housing 20 and a second portion 93 extending along a second side edge 23 of the housing 20. The light source 80 is placed at the base end side of the first portions 91, 92. The camera 70 is placed at the front end 25 side of the housing 20 inner side than the side edges 22, 23, and the imaging direction thereof is set in at least a direction intersecting a flat surface 21 of the housing 20.SELECTED DRAWING: Figure 1

Description

The present invention relates to an appearance confirmation device for a radioactive waste storage container and an appearance confirmation structure for a radioactive waste storage container.

The radioactive waste is stored in a radioactive waste storage container (hereinafter, also simply referred to as “storage container”) such as a drum can. Rust, cracks, etc. may occur in this storage container due to deterioration over time, and radioactive waste may leak from the storage container. Therefore, the appearance of the storage container is regularly checked.

As a means for confirming the appearance of the drum can as described above, for example, in Patent Document 1 below, a digital line camera is used to rotate the drum can for storing radioactive waste to take an image. The appearance confirmation device is described.

By the way, a plurality of drums in which radioactive waste is stored as described above are often densely arranged in a predetermined area. In this case, the gap between the drums arranged adjacent to each other becomes narrow, and it tends to be a dark place. When taking an image of such a dark space with a camera, it is necessary to irradiate the appearance of a drum can or the like with appropriate light.

For example, Patent Document 2 below describes an image visual inspection apparatus including a cylindrical light diffusing member and a ring illumination in which LED bulbs are arranged in a ring shape on the inner peripheral surface thereof.

Further, as an inspection device having a camera, in Patent Document 3 below, a light source and a light source are arranged diagonally with respect to the irradiation direction, half-reflecting the light, irradiating the inspection material, and half transmitting the light. A visual inspection device including a half mirror and a camera arranged on the opposite side of the inspection material across the half mirror is described. Then, the light emitted from the light source is reflected by the half mirror and is applied to the inspection material, and the image of the inspection material is transmitted through the half mirror and imaged by the camera.

Japanese Unexamined Patent Publication No. 2000-310698 Japanese Unexamined Patent Publication No. 2015-55569 Japanese Unexamined Patent Publication No. 2019-66219

By the way, drums in which radioactive waste is stored are often glossy due to paint or the like applied to the surface. Therefore, the light from the LED bulb is irradiated by the ring illumination in which the LED bulb is arranged in a ring shape as in the image appearance inspection device of Patent Document 2 in a state adjacent to such a drum can. Then, the light is strongly reflected and the camera image tends to be overexposed.

Further, in the case of the visual inspection device of Patent Document 3, since a half mirror is used, the device becomes bulky, and the drum cans densely arranged in a predetermined area are inserted into a narrow gap. Is difficult.

Therefore, an object of the present invention is radioactive waste, which can be easily inserted into a gap between a plurality of radioactive waste storage containers, can be easily imaged by a camera, and can suppress overexposure of the captured camera image. It is an object of the present invention to provide an appearance confirmation device for a material storage container and an appearance confirmation structure for a radioactive waste storage container.

In order to achieve the above object, the appearance confirmation device for the radioactive waste storage container according to the present invention is for confirming the appearance of the radioactive waste storage container for storing radioactive waste, and is a flat plate having a predetermined thickness. A housing having a flat surface, a camera arranged in the housing, a light source arranged in the housing, and a light source arranged along the side edge of the housing and supplied from the light source. The optical fiber comprises an optical fiber that emits light by the light emitted from the housing, and the optical fiber is directed from a base end portion to a tip end portion of the housing portion at least along a first side edge portion of the housing. It has a first portion extending in a direction and a second portion extending in a second direction along the second side edge portion of the housing, which is a direction intersecting the first direction. The light source is arranged on the base end side of the first portion, and the camera is on the tip end side of the housing, and the first side edge portion and the second side edge of the housing are provided. It is characterized in that it is arranged inside the portion and the imaging direction of the camera is at least a direction intersecting the flat surface of the housing.

According to the above invention, the light source is arranged on the base end side of the first portion of the optical fiber, and the camera is arranged on the tip end side of the housing (that is, at a position where the thick light source and the camera are separated from each other. By arranging the optical fibers along the side edges of the housing, the appearance confirmation device can be made thinner. As a result, even if the gap between multiple radioactive waste storage containers is narrow, it is possible to easily insert the appearance confirmation device into this narrow gap, and the appearance of the radioactive waste storage container is placed in the appearance confirmation device. Can be imaged relatively easily.

In addition, the light required for image capture by the camera is not direct light from the light source, but indirect light emitted from the optical fiber, so even when illuminating the glossy radioactive waste storage container in an adjacent state. , It is possible to weaken the reflection of light from the container and suppress overexposure of the camera image.

Further, since the camera is arranged inside the first side edge portion and the second side edge portion of the housing, it is difficult for the indirect light from the first portion and the second portion of the optical fiber to reach the camera directly. Can be made to. Further, since the image pickup direction of the camera is at least a direction intersecting the flat surface of the housing (for example, a direction corresponding to the thickness direction), the image pickup direction of the camera and the first and second portions of the optical fiber are used. The light emission direction of the light can be set so as not to overlap (cover) as much as possible. Therefore, it is possible to suppress the influence of the indirect light from the first portion and the second portion of the optical fiber on the camera image and suppress the overexposure of the camera image.

As described above, by adopting a plurality of overexposure suppression structures as described above, it is possible to effectively suppress overexposure in the camera image and obtain a clear image of the radioactive waste storage container, which is radioactive. The appearance of the waste storage container can be confirmed with high accuracy.

In the device for confirming the appearance of the radioactive waste storage container according to the present invention, the second side edge portion of the housing extends toward the outside of the housing and is viewed from the image pickup direction of the camera. It is preferable that a protruding portion is provided so as to overlap with the second portion of the optical fiber.

According to the above aspect, since the projecting portion extending from the second side edge portion of the housing toward the outside of the housing and protruding so as to overlap the second portion of the optical fiber is provided, the optical fiber is provided. It is possible to make it difficult for the indirect light from the second portion to reach the camera directly, and it is possible to further suppress overexposure of the camera image.

In the device for confirming the appearance of the radioactive waste storage container according to the present invention, the optical fibers have a pair of the first portions arranged along the first side edge of the housing so as to be parallel to each other. It is preferable that the tips of these first portions are connected to each other by the second portion to form a U-shaped bent shape.

According to the above aspect, the optical fiber has a pair of first portions arranged along the first side edge portion of the housing so as to be parallel to each other, and the tips of the first portions thereof are connected to each other. , Since it is connected by the second part and has a U-shaped bent shape, when the gap between multiple radioactive waste storage containers is narrow, from the pair of first part and second part of the optical fiber. Since the indirect light of the above is radiated over a wide range of the radioactive waste storage container, a clear camera image can be obtained over a wide range, and the appearance of the radioactive waste storage container can be confirmed more accurately.

In the device for confirming the appearance of the radioactive waste storage container according to the present invention, the camera is arranged on the tip end side of the housing, and the first side edge of the housing is the optical fiber. It has an accommodating portion that accommodates one portion and blocks light emission to the outside of the housing, and an opening that exposes the proximal end side of the first portion of the optical fiber to allow light emission to the outside of the housing. It is preferable to do.

According to the above aspect, the camera is arranged on the tip end side of the housing, and the light emission of the first portion of the optical fiber is blocked by the accommodating portion, and only the base end side thereof is the first portion of the housing. Since it is exposed from the opening of the side edge portion, the indirect light from the first part of the optical fiber is partially blocked and only the light emitted from the proximal end side, so that the indirect light is directly directed to the camera. It becomes difficult to reach, and it is possible to make it more difficult for the camera image to be overexposed.

In the device for confirming the appearance of the radioactive waste storage container according to the present invention, the camera is an omnidirectional camera having a front lens and a rear lens, and the front lens and the thickness direction are one of the thickness directions of the housing. It is preferable that the rear lens is arranged in the housing so that the rear lens faces the other side of the housing.

According to the above aspect, the camera is an omnidirectional camera having a front lens and a rear lens, and is arranged in the housing so that the front lens faces one side in the thickness direction of the housing and the rear lens faces the other in the thickness direction. Therefore, the appearance of the radioactive waste storage container can be imaged in a wide range, and the workability of checking the appearance of the radioactive waste storage container can be improved.

On the other hand, the appearance confirmation structure of the radioactive waste storage container according to the present invention includes the above-mentioned appearance confirmation device for the radioactive waste storage container and a mounting pole to which the appearance confirmation device for the radioactive waste storage container is attached. The mounting pole has a gripping rod that can be gripped by an operator and a rotating rod that is rotatably connected to the gripping rod, and the tip of the rotating rod is the above-mentioned. It is characterized by being equipped with an appearance confirmation device for the radioactive waste storage container.

According to the above invention, even when the radioactive waste storage container is placed in a place where it is difficult for an operator to enter, the gripping rod is gripped and the rotating rod is appropriately rotated with respect to the gripping rod. The appearance of the radioactive waste storage container can be easily confirmed by using the appearance confirmation device.

According to the present invention, the appearance confirmation device is made thinner by arranging the optical fiber and the light source at positions shifted from each other with respect to the flat plate-shaped housing. This makes it easy to insert the appearance confirmation device into the narrow gap between multiple radioactive waste storage containers, and the appearance of the radioactive waste storage container can be imaged relatively easily with a camera placed in the appearance confirmation device. Can be done.

In addition, since the light required for camera imaging is indirect light emitted from the optical fiber, when the radioactive waste storage container is glossy, the reflection of light is weakened to suppress overexposure of the camera image. Can be done.

Further, since the camera is arranged inside the first side edge portion and the second side edge portion of the housing, it is difficult for the indirect light from the first portion and the second portion of the optical fiber to reach the camera directly. Since the image pickup direction of the camera is the direction intersecting the flat surface of the housing, the image pickup direction of the camera and the light emission direction of the light from the first portion and the second portion of the optical fiber are changed. It is possible to suppress the influence of the indirect light from the first portion and the second portion of the optical fiber on the camera image and suppress the overexposure of the camera image.

It is a perspective view which shows one Embodiment of the appearance confirmation apparatus of the radioactive waste storage container which concerns on this invention. It is a top view of the appearance confirmation device. It is a side view of the appearance confirmation device. It is a top view of the base member constituting the housing of the appearance confirmation device. It is sectional drawing in the VV arrow line of FIG. It is a perspective view which shows one Embodiment of the appearance confirmation structure of the radioactive waste storage container which concerns on this invention. It is a perspective view which shows the usage of the appearance confirmation apparatus of the radioactive waste storage container which concerns on this invention, and the appearance confirmation structure of a radioactive waste storage container.

(Appearance confirmation device for radioactive waste storage container)
Hereinafter, an embodiment of the appearance confirmation device for the radioactive waste storage container according to the present invention will be described with reference to the drawings.

As shown in FIG. 7, the appearance confirmation device 10 (hereinafter, also simply referred to as “appearance confirmation device 10”) of the radioactive waste storage container in this embodiment is a radioactive waste storage container 1 (hereinafter, simply referred to as “appearance confirmation device 10”) for storing radioactive waste. , Simply referred to as "storage container 1"). In particular, the appearance confirmation device 10 is inserted into a narrow gap between the storage containers 1 and 1 arranged adjacent to each other, and is preferably used when checking the appearance of the storage container 1 in the gap. It has become. However, the application location of the appearance confirmation device 10 is not limited to the narrow gap between the storage containers 1 and 1. The storage container 1 in this embodiment is a so-called drum can having a substantially cylindrical shape with a bottom and the upper part is closed with a lid, and a glossy paint is applied to the surface thereof.

As shown in FIGS. 1 to 3, the appearance confirmation device 10 includes a housing 20 having a flat plate shape and a flat surface 21 having a predetermined thickness, a camera 70 arranged in the housing 20, and a housing 20. It includes an arranged light source 80 and an optical fiber 90 arranged along the side edge portions 22 and 23 of the housing 20 and emitting light by the light supplied from the light source 80.

The housing 20 in this embodiment is a long flat plate-shaped case that extends long along the insertion direction (see FIG. 7) into the gap between the storage containers 1 and 1, and extends in the longitudinal direction of the housing 20. The width of the side edges forming the first side edges 22, 22 (hereinafter, also simply referred to as “first side edges”) and intersecting the longitudinal direction of the housing 20 (here, orthogonal to the longitudinal direction). The direction forms the second side edge portion 23 (hereinafter, also simply referred to as “second side edge portion 23”). Further, one end of the housing 20 in the longitudinal direction (the end opposite to the insertion direction) forms the base end portion 24, and the other end in the longitudinal direction (the end on the insertion direction side) forms the tip portion 25. ing.

Further, as shown in FIG. 5, the optical fiber 90 is at least in a direction from the base end portion 24 of the housing 20 toward the tip end portion 25 along the first side edge portion 22 of the housing 20. A first portion 91 extending in one direction A1 and a second portion 93 extending in a second direction A2 along the second side edge portion 23 of the housing 20 and intersecting the first direction A1. Have. The second direction A2 in this embodiment is a direction orthogonal to the first direction A1.

Further, as shown in FIG. 5, the optical fibers 90 in this embodiment have a pair of first portions 91, 92 arranged along the first side edge portion 22 of the housing 20 so as to be parallel to each other. These first portions 91, 92 are arranged orthogonally to the tip side in the extending direction, and the tips of the pair of first portions 91, 92 are placed on each other via the bent portions 94, 94 bent in an R shape. It has a U-shaped bent shape consisting of a second portion 93 to be connected.

The shape of the optical fiber is not limited to the above shape, and is, for example, a substantially L-shape including one first portion 91 and a second portion 93 extending orthogonally from the tip thereof. It may have at least a first part and a second part. Further, the intersection angle of the second portion with respect to the first portion may not be 90 degrees, but may be an angle that intersects at a predetermined angle.

Further, the light source 80 in this embodiment is an LED (light emitting diode), and is arranged on the proximal end side of the first portions 91 and 92 of the optical fiber 90, respectively. That is, in this embodiment, it has a pair of light sources 80, 80. Further, the light source 80 is arranged so that the light irradiation port faces the base end of the first portions 91 and 92 of the optical fiber 90. Further, as shown in FIG. 5, the light source 80 is connected to the connector 81 via the wiring 80a, and emits light by being supplied with electric power from a power supply source (not shown) connected to the connector 81. It has become.

The light source may be, for example, a laser, a discharge lamp, a light bulb, or the like, in addition to the LED, and is not particularly limited.

On the other hand, the camera 70 in this embodiment has a long case 71 extending by a predetermined length, and has a front lens 72 and a rear lens 73 (see FIG. 3) on both side surfaces on the distal end side in the longitudinal direction thereof. , It is a well-known spherical camera.

As shown in FIG. 5, the camera 70 is located on the tip end portion 25 side of the housing 20, and is arranged inside the first side edge portion 22 and the second side edge portion 23 of the housing 20. .. Further, the camera 70 in this embodiment is arranged on the tip portion 25 side of the housing 20 as a whole, and in particular, both lenses 72 and 73 are arranged at positions close to the inside of the tip portion 25 of the housing 20. There is. Further, as shown in FIG. 3, the camera 70 is arranged in the housing 20 so that the front lens 72 faces one of the thickness directions of the housing 20 and the rear lens 73 faces the other in the thickness direction. ing.

Further, a plurality of connectors 74 and 75 are connected to the proximal end side of the case 71 of the camera 70, and cables 74a and 75a extending from these connectors 74 and 75 are arranged outside the camera 70. It is connected to a power supply source (not shown), an external monitor, etc.

As shown in FIG. 3, the camera 70 has an imaging direction F (that is, a direction in which the lenses 72 and 73 face) intersects the flat surface 21 of the housing 20. That is, the image pickup direction F of the camera 70 is at least a direction that intersects the surface direction of the flat surface 21 of the housing 20 (the direction along the surface of the flat surface 21). The image pickup direction of the camera means the direction of the lens provided in the camera along the optical axis. The image pickup direction F of the camera 70 in this embodiment is a direction orthogonal to the flat surface 21 of the housing 20. Further, the image pickup direction F of the camera 70 is a direction corresponding to the thickness direction of the housing 20, and it can be said that both the lenses 72 and 73 of the camera 70 described above face the image pickup direction F of the camera 70. ..

Since the camera 70 in this embodiment is a well-known spherical camera as described above, the image pickup range R centered on the optical axis of the lenses 72 and 73 (that is, the image pickup direction of the camera is the center). The imaging range) is as shown in FIG. That is, since the camera 70 is an omnidirectional camera, basically, the entire 360 ° range is captured at a position 100 mm away from the center of the lenses 72 and 73 (the position on the outer surface of the lens and passing through the optical axis). Specifically, each of the lenses 72 and 73 on one side has an imaging range R of 0 to 183 °.

Further, it is preferable that the camera 70 of this embodiment can secure an imaging range of 360 ° in a range as close as possible to the lenses 72 and 73. In this embodiment, a blind spot occurs in the imaging range of the camera 70 due to the shape and structure of the housing 20, the layout of the optical fiber 90, etc., but at a position 120 mm away from the center of the lens, each lens 72 on one side, In each of the 73, the shape and structure of the housing 20 and the layout of the optical fiber 90 are arranged so that an imaging range of 0 to 182.5 ° can be secured.

The image pickup direction F of the camera 70 may be at least a direction that intersects the flat surface 21 of the housing 20 at a predetermined angle, and is not particularly limited.

Further, the camera is not limited to the spherical camera having a long case as described above, and cameras having various shapes and structures can be adopted. However, even in that case, the camera needs to be arranged inside the first side edge portion 22 and the second side edge portion 23 of the housing 20.

Returning to the description of the housing 20, the second side edge portion 23 of the housing 20 in this embodiment extends toward the outside of the housing 20 and is viewed from the camera 70 imaging direction F. A protruding portion 26 is provided so as to overlap the second portion 93 of the optical fiber 90. Further, the first side edge portion 22 of the housing 20 accommodates the first portions 91 and 92 of the optical fiber 90 and blocks the light emission to the outside of the housing 20, and the first side of the optical fiber 90. It has an opening 28 that exposes the base end side of the portions 91 and 92 and enables light emission to the outside of the housing 20. In the case of this embodiment, the opening 28 of the housing 20 is provided at a position closer to the base end portion 24 of the housing 20. Hereinafter, the structure of the housing 20 will be described in detail.

As shown in FIG. 1, the housing 20 in this embodiment has a long base member 30 having a constant width and a predetermined length, and a first cover mounted on the distal end side of the base member 30 in the longitudinal direction. It is composed of three members, a member 50 and a second cover member 60 mounted on the proximal end side in the longitudinal direction of the base member 30, and has a flat plate shape formed with a predetermined thickness as a whole.

As shown in FIG. 4, the base member 30 has a base portion 31 having a substantially elongated plate shape having a predetermined thickness. Notches 32 and 32 forming openings 28 of the housing 20 are provided on both sides of the base 31 near the base end portion 24 of the housing 20 in the width direction, respectively. ..

Further, as shown in FIG. 4, the camera exposure is formed in the middle portion in the width direction of the base portion 31 and is notched in a long hole shape on the tip portion 25 side of the housing 20 rather than the notch portions 32 and 32. The portion 34 is formed. One side surface of the case 71 of the camera 70 in the thickness direction and the rear lens 73 are exposed from the camera exposed portion 34.

Further, a pair of side wall portions 35, 36 are provided with a predetermined thickness on both side edge portions of the base portion 31 along the longitudinal direction of the camera exposed portion 34. Further, a part of one side wall portion 35 has a protrusion 35a protruding toward the other side wall portion 36, and a fiber insertion hole 35b is formed in the protrusion 35a.

Then, one first portion 91 of the optical fiber 90 is arranged inside the one side wall portion 35, and a part of the first portion 91 is inserted into the fiber insertion hole 35b, so that the first portion 91 is inserted. Is housed. On the other hand, the other first portion 92 of the optical fiber 90 is arranged inside the other side wall portion 36.

Further, there is a predetermined gap inside the side edge portion of the base portion 31 on the distal end side of the camera exposed portion 34 and the side edge portion on the proximal end side of the pair of side wall portions 35 and 36. , The camera holding walls 38 and 39 are projected, respectively. The camera holding walls 38 and 39 are arranged orthogonal to the pair of side wall portions 35 and 36. These camera holding walls 38 and 39 are arranged outside both ends of the elongated case 71 in the longitudinal direction of the camera 70, and the camera 70 is displaced in the longitudinal direction in the housing 20. Suppress.

As shown in FIG. 5, one first portion 91 of the optical fiber 90 is arranged between one side wall portion 35 and one side edge portion along the longitudinal direction of the case 71 of the camera 70. The other first portion 92 of the optical fiber 90 is arranged between the other side wall portion 36 and the other side edge portion along the longitudinal direction of the case 71 of the camera 70.

Further, the protrusion 40 projects with a predetermined width from the outer surface of the camera holding wall 38 provided on the side edge portion on the tip end side of the base portion 31. The protrusion 40 has a shape in which both corner portions in the width direction are rounded in an arc shape. Further, on the outer peripheral surfaces of the camera holding wall 38 and the protrusion 40, a fiber arrangement recess 41 having a curved inner circumference and a concave groove shape is formed. In the fiber arrangement recess 41, the second portion 93 of the optical fiber 90, the bent portions 94, 94, and the tips of the first portions 91, 92 are accommodated and arranged, and they can be held with less rattling. It has become.

Further, a base end wall portion 42 is provided so as to project from the base end portion in the longitudinal direction of the base portion 31. As shown in FIG. 4, a notch 42a is formed on one side of the base end wall portion 42 in the width direction.

Further, a concave groove which is a central portion in the width direction of the base portion 31 and which accommodates and holds the connectors 74 and 75 connected to the base end of the camera 70 between the camera holding wall 39 and the base end wall portion 42. The connector accommodating portions 43 and 44 having a shape and the cable accommodating portions 43a and 44a having a concave groove shape for accommodating and holding the cables 74a and 75a extending from the connectors 74 and 75 are formed.

Further, a groove-shaped light source that accommodates and holds a pair of light sources 80, 80 between the notch portions 32, 32 and the base end wall portion 42 on both sides of the base portion 31 in the width direction. The accommodating portions 45 and 46 and the wiring accommodating portions 45a and 46a having a concave groove shape for accommodating and holding the wirings 80a and 80a extending from the light sources 80 and 80 are formed. Further, windows 45b and 46b are formed at the bottoms of the light source accommodating portions 45 and 46, respectively.

Next, the first cover member 50 will be described.

The first cover member 50 has a plate shape thinner than that of the base member 30. Specifically, the first cover member 50 has a long plate shape that fits the pair of side wall portions 35 and 36 of the base member 30, and the pair of side plate portions 51 and 52 arranged in parallel with each other and the base member 30. It has a shape suitable for the camera holding wall 38, is arranged orthogonally to the pair of side plate portions 51, 52, and has a connecting portion 53 connecting the tips of the pair of side plate portions 51, 52. It has a character shape.

Further, inside the pair of side plate portions 51 and 52 and the connecting portion 53, a camera exposed portion 54 corresponding to the camera exposed portion 34 of the base member 30 is defined. The other side surface of the case 71 of the camera 70 in the thickness direction and the front lens 72 are exposed from the camera exposed portion 54. Further, a plate-shaped protrusion 55 having a shape suitable for the protrusion 40 of the base member 30 is projected from the outer edge of the connecting portion 53.

Then, as shown in FIGS. 1 and 2, the thickness of the pair of side plate portions 51, 52 and the protrusion 55 of the first cover member 50, the thickness of the pair of side wall portions 35, 36 of the base member 30, and the camera holding wall 38. The first cover member 50 is mounted on the tip end side in the longitudinal direction of the base member 30 by abutting each one on one end surface in the radial direction and tightening and fixing the base member 30 with a plurality of screws or the like.

At this time, the protrusion 40 of the base member 30 and the protrusion 55 of the first cover member 50 form the protrusion 26 described above in the housing 20. Further, the above-mentioned accommodating portion 27 is formed in the housing 20 by the pair of side wall portions 35, 36 of the base member 30 and the pair of side plate portions 51, 52 of the first cover member 50. Further, the portion of the first portions 91, 92 of the optical fiber 90 on the tip end side of the opening 28 of the housing 20 is sandwiched between the base member 30 and the first cover member 50, and is contained in the housing 20. It is designed to be held in place.

Next, the second cover member 60 will be described.

The second cover member 60 basically has the same shape as the shape of the base end portion side of the notch portions 32, 32 of the base member 30. That is, the second cover member 60 has a thickness similar to that of the base member 30, and has a substantially elongated plate shape extending shorter than the base member 30, and is on the distal end side in the longitudinal direction and on both sides in the width direction. Is formed of notches 61, 61 having a shape suitable for the notches 32, 32 of the base member 30, respectively.

Further, although not particularly shown, on the inner surface side (opposite surface side with the base member 30) of the second cover member 60, the connector accommodating portions 43, 44, the cable accommodating portions 43a, 44a, and the light source formed on the base member 30 are provided. A connector accommodating portion, a cable accommodating portion, a light source accommodating portion, and a wiring accommodating portion are formed in a concave groove shape corresponding to the accommodating portions 45, 46, the wiring accommodating portions 45a, 46a, and the like.

Further, a window portion 62 is formed at the bottom of the light source accommodating portion. A part of the outer periphery of the light source 80 enters the window portions 62 and the window portions 45b and 46b formed in the light source accommodating portions 45 and 46 on the base member 30 side to reduce the wall thickness of the housing 20. Contributes to. As described above, since the light irradiation port of the light source 80 is arranged toward the base end of the first portions 91 and 92 of the optical fiber 90, the light source 80 is used from the above window portion. Light does not leak.

Then, as shown in FIGS. 1 and 2, the thickness direction of the second cover member 60 and the like are on one end surface in the thickness direction of the portion of the base member 30 on the base end side of the notches 32 and 32. The second cover member 60 is mounted on the base end side in the longitudinal direction of the base member 30 by bringing the end faces into contact with each other and tightening and fixing them with a plurality of screws or the like.

At this time, the cutouts 32, 32 of the base member 30 and the cutouts 61, 61 of the second cover member 60 form the above-mentioned openings 28, 28 in the housing 20. Further, the connectors 74, 75 of the camera 70, their cables 74a, 75a, the pair of light sources 80, 80, their wiring 80a, 80a, etc. are sandwiched between the base member 30 and the second cover member 60, and the housing is held. It is designed to be held in the body 20 to prevent it from coming off. The cables 74a and 75a of the camera 70 are inserted to the outside of the housing 20 through the notch 42a formed in the base end wall portion 42 of the base member 30.

The shape and structure of the housing described above are merely examples, and are not limited to the above-mentioned shape and structure. For example, the first cover member and the second cover member may be integrated into a cover member having the same shape as the base member. Further, the housing 20 in this embodiment is a long flat plate-shaped case that extends long along the insertion direction into the gap between the storage containers 1 and 1, from the tip end side to the base end side in the insertion direction. Although it extends with a substantially constant width, for example, the width may be narrowed on the tip end side in the insertion direction and gradually widened toward the base end side in the insertion direction to enhance the insertability into the narrow gap.

Further, as described above, in the optical fiber 90 in this embodiment, the first portions 91 and 92 are accommodated by the accommodating portion 27 of the housing 20, and the first portion 91 is accommodated by the opening 28 of the housing 20. , 92 has a structure in which the proximal end side is exposed, respectively. For example, the entire first portion 91, 92 of the optical fiber 90 is accommodated in the accommodating portion of the housing 20, and the first portion of the optical fiber 90 is accommodated. The exposed portions may not be provided in 91 and 92. Further, the exposed positions of the first portions 91 and 92 of the optical fiber 90 are not limited to the proximal end side of the first portions 91 and 92, and may be exposed at any position.

Further, in this embodiment, the first portions 91 and 92 of the optical fiber 90 are accommodated by the accommodating portion 27 of the housing 20, but for example, the first portions 91 and 92 of the optical fiber 90 are accommodated. , Arranged on the outside of the first side edge portions 22 and 22 of the housing 20, positioned and fixed by a C-shaped ring-shaped holder, and then a part of the first portions 91 and 92 of the optical fiber 90 is placed on the positioning and fixing. The structure may be such that the rest is exposed by covering with a cover member, or the entire first portions 91 and 92 are exposed.

(Appearance confirmation device for radioactive waste storage container)
Next, an embodiment of the appearance confirmation device for the radioactive waste storage container according to the present invention will be described.

As shown in FIG. 6, the appearance confirmation structure 100 (hereinafter, also simply referred to as “appearance confirmation structure 100”) of the radioactive waste storage container in this embodiment includes the above-mentioned appearance confirmation device 10 and the appearance confirmation device 10. It is equipped with a mounted mounting pole 110.

Further, the mounting pole 110 includes a gripping rod 120 that can be gripped by the operator H (see FIG. 7), and a rotating rod 130 that is rotatably connected to the gripping rod 120 via a hinge structure 125. is doing. Further, the rotating rod 130 has a telescopic rod 135 that can be expanded and contracted, and the appearance confirmation device 10 is attached to the tip portion 136 of the telescopic rod 135. The mounting pole may be provided with two or more hinge structures so that the two or more rotating rods can be rotated.

(Action effect)
Next, the operation and effect of the appearance confirmation device 10 and the appearance confirmation structure 100 having the above configuration will be described.

As shown in FIG. 7, in this embodiment, a plurality of storage containers 1 arranged adjacent to each other with a predetermined gap are stacked in three stages via a tray 2, and the uppermost storage container 1 is used. A plate 3 on which the worker H can get on is arranged.

Then, electric power is supplied to the light source 80 of the appearance confirmation device 10, light is supplied to the optical fiber 90, and the optical fiber 90 is made to emit light. At this time, the light (direct light) emitted from the light irradiation port of the light source 80 enters from the proximal end side of the first portions 91 and 92 of the optical fiber 90, and is reflected or scattered in the optical fiber 90. Repeatedly, the entire optical fiber 90 is made to emit light by indirect light.

As described above, in a state where the optical fiber 90 is made to emit light, as shown in FIG. 7, the operator H grips the gripping rod 120 of the mounting pole 110 and attaches the appearance checking device 10 to the tip portion 136 thereof. Is inserted into the narrow gap between the storage containers 1 and 1 arranged adjacent to each other. At this time, the housing 20 of the appearance confirmation device 10 is aligned with the gaps between the storage containers 1 and 1, and is oriented vertically as shown in FIG. 1, that is, the pair of first portions 91 and 92 of the optical fiber 90 is vertically oriented. The third portion 93 of the optical fiber 90 is inserted first with both lenses 72 and 73 of the camera 70 oriented in the left-right direction.

As shown in FIG. 7, in this embodiment, the storage containers 1 are stacked in a plurality of stages via the tray 2, but the appearance confirmation device 10 is inserted into the gaps between the storage containers 1 and 1 in the upper and middle stages. When doing so, do as follows. That is, the operator H rides on the plate 3 shown in FIG. 7, the gripping rod 120 of the appearance confirmation structure 100 is turned downward, and the rotating rod 130 is appropriately moved with respect to the gripping rod 120 via the hinge structure 125. By rotating the appearance checking device 10, the tip end side (second portion 93 side of the optical fiber 90) is directed toward the storage container 1, and in that state, the appearance checking device 10 is inserted into the gap between the storage containers 1 and 1. ..

Then, indirect light from the first portions 91, 92 of the optical fiber 90 passes through the openings 28, 28 of the housing 20 from the base end side of the first portions 91, 92, and is a storage container outside the housing. In addition to irradiating the outer peripheral surface of No. 1, indirect light from the second portion 93 of the optical fiber 90 is irradiated to the outer peripheral surface in front of the insertion direction of the appearance confirmation device 10 and the inner surface of the storage container 1. Along with this, the appearance of the storage container 1 is imaged by both lenses 72 and 73 of the camera 70.

In the appearance confirmation device 10, the light sources 80 and 80 are arranged on the base end side of the first portions 91 and 92 of the optical fiber 90, and the camera 70 is arranged on the tip end portion 25 side of the housing 20 (). That is, the thick light source 80 and the camera 70 are arranged at separate positions), and the optical fiber 90 is arranged along the side edge portions 22 and 23 of the housing 20. Can be made thinner. As a result, even when the gap between the storage containers 1 and 1 is narrow, the appearance confirmation device 10 can be easily inserted into this narrow gap, and the appearance of the storage container 1 is measured by the camera 70 arranged in the appearance confirmation device 10. It is relatively easy to take an image.

Further, since the light required for imaging of the camera 70 is not the direct light from the light source 80 but the indirect light emitted from the optical fiber 90, the appearance confirmation device 10 is adjacent to the glossy storage container 1. Even when illuminated by the optical fiber 90, the reflection of light from the storage container 1 can be weakened to suppress overexposure of the camera image.

Further, since the camera 70 is arranged inside the first side edge portion 22 and the second side edge portion 23 of the housing 20, it is indirect from the first portion 91, 92 and the second portion 93 of the optical fiber 90. It is possible to make it difficult for light to reach both lenses 72 and 73 of the camera 70 directly. Further, since the image pickup direction F of the camera 70 is at least a direction that intersects the flat surface 21 of the housing 20 (for example, the direction can coincide with the thickness direction), the image pickup direction F of the camera 70 and the optical fiber 90. The emission directions of the light from the first portion 91, 92 and the second portion 93 of the above can be oriented so as not to overlap (cover) as much as possible. Therefore, it is possible to suppress the influence of the indirect light from the first portions 91 and 92 and the second portion 93 of the optical fiber 90 on the camera image and suppress the overexposure of the camera image.

As described above, in this appearance confirmation device 10, by adopting a plurality of overexposure suppression structures as described above, overexposure of the camera image is effectively suppressed, and a clear image of the storage container 1 is obtained. It can be obtained, and the appearance of the storage container 1 can be confirmed with high accuracy.

Further, in this embodiment, the second side edge portion 23 of the housing 20 extends toward the outside of the housing 20, and the second portion 93 of the optical fiber 90 is viewed from the camera 70 imaging direction F. A protruding portion 26 is provided so as to overlap with the above. Therefore, the indirect light from the second portion 93 of the optical fiber 90 can be made difficult to reach directly to both lenses 72 and 73 of the camera 70, and overexposure of the camera image can be further suppressed.

Further, in this embodiment, the optical fiber 90 has a pair of first portions 91, 92 arranged along the first side edge portion 22 of the housing 20 so as to be parallel to each other. The tips of the first portions 91 and 92 are connected to each other by the second portion 93 to form a U-shaped bend.

According to the above aspect, when the gap between the storage containers 1 and 1 is narrow, the indirect light from the pair of first portions 91 and 92 and the second portion 93 of the optical fiber 90 spreads over a wide range of the outer peripheral surface of the storage container 1. (In particular, the pair of first portions 91 and 92 of the optical fiber 90 can irradiate a wide range of indirect light along the vertical direction of the narrow gaps of the storage containers 1 and 1). A wide range of camera images can be obtained, and the appearance of the storage container 1 can be confirmed more accurately.

Further, even if one of the pair of first portions 91 and 92 has a problem such as disconnection, if the other is normal, light is surely transmitted to the second portion 93 through the normal first portion. Can be supplied to.

Further, when the light sources 80 and 80 are arranged on the proximal ends of both the pair of first portions 91 and 92 as in the present embodiment, they are supplied from both of the pair of first portions 91 and 92. Since the generated light is transmitted to the second portion 93, it is possible to supply light with sufficient illuminance for camera imaging while reducing the size of the light source 80 (with one light source, the camera). If an attempt is made to supply light with sufficient illuminance for imaging, the light source will become large). As a result, it is possible to obtain an appearance confirmation device 10 that can supply light having sufficient illuminance for camera imaging and can further reduce the thickness.

Further, in this embodiment, the camera 70 is arranged on the tip end portion 25 side of the housing 20, and the first side edge portion 22 of the housing 20 has the first portions 91, 92 of the optical fiber 90. The accommodating portion 27 that accommodates and blocks light emission to the outside of the housing 20 and the proximal end side of the first portions 91 and 92 of the optical fiber 90 are exposed to enable light emission to the outside of the housing 20. It has an opening 28.

According to the above aspect, the camera 70 is arranged on the tip end portion 25 side of the housing 20, and the first portions 91 and 92 of the optical fiber 90 are blocked from light emission by the accommodating portion 27 and the base end thereof. Since only the side is exposed from the openings 28, 28 of the first side edge portion 22 of the housing 20, the indirect light from the first portions 91, 92 of the optical fiber 90 is partially blocked and the base. Since only the light emitted from the end side is emitted, the indirect light is less likely to reach the lenses 72 and 73 of the camera 70 directly, and the camera image can be further less likely to be overexposed.

In particular, in this embodiment, both lenses 72 and 73 of the camera 70 are arranged on the tip end portion 25 side of the housing 20, and the opening 28 is provided at a position closer to the base end portion 24 of the housing 20. Therefore, it is possible to secure a long distance between both lenses 72 and 73 of the camera 70 and the exposed portion of the first portion 91 and 92 of the optical fiber 90, and the first portion 91 and 92 of the optical fiber 90 can be secured. Indirect light from the exposed portion is made difficult to reach both lenses 72 and 73 of the camera 70, so that overexposure of the camera image can be suppressed more effectively.

Further, in this embodiment, the camera 70 is an omnidirectional camera having a front lens 72 and a rear lens 73, with the front lens 72 on one side in the thickness direction of the housing 20 and the rear lens 73 on the other side in the thickness direction. It is arranged in the housing 20 so as to face it. Therefore, the appearance of the storage container 1 can be imaged in a wide range, and the workability of confirming the appearance of the storage container 1 can be improved.

On the other hand, the appearance confirmation structure 100 includes an appearance confirmation device 10 having the above-mentioned structure and a mounting pole 110 to which the appearance confirmation device 10 is attached, and the mounting pole 110 can be gripped by the operator H. It has a rod 120 and a rotating rod 130 rotatably connected to the gripping rod 120, and an appearance confirmation device 10 is attached to a tip portion 136 thereof.

Therefore, even when the storage container 1 is arranged in a place where it is difficult for an operator to enter, the appearance confirmation device 10 is obtained by gripping the gripping rod 120 and appropriately rotating the rotating rod 130 with respect to the gripping rod 120. The appearance of the storage container 1 can be easily confirmed by using the above.

The present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. ..

1 Radioactive waste storage container (storage container)
2 Tray 3 Plate 10 Appearance confirmation device for radioactive waste storage container (appearance confirmation device)
20 Housing 21 Flat surface 22 First side edge (first side edge)
23 Second side edge (second side edge)
24 Base end 25 Tip part 26 Protruding part 27 Housing part 28 Opening part 30 Base member 31 Base part 32 Notch part 34 Camera exposed part 35, 36 Side wall part 35a Protrusion part 35b Fiber insertion hole 38, 39 Camera holding wall 40 Protrusion part 41 Fiber placement recess 42 Base end wall 43, 44 Connector housing 43a, 44a Cable housing 45, 46 Light source 45a, 46a Wiring housing 45b, 46b Window 50 First cover member 51, 52 Side plate 53 Connection Part 54 Camera exposed part 55 Protrusion part 60 Second cover member 61 Notch part 62 Window part 70 Camera 71 Case 72 Front lens 73 Rear lens 74, 75 Connector 74a, 75a Cable 80 Light source 80a Wiring 81 Connector 90 Optical fiber 91, 92 No. 1st part 93 2nd part 94 Bending part 100 Appearance confirmation structure of radioactive waste storage container (appearance confirmation structure)
110 Mounting Pole 120 Grip Rod 125 Hinge Structure 130 Rotating Rod 135 Telescopic Rod 136 Tip A1 First Direction A2 Second Direction F Imaging Direction H Worker

Claims (6)

It is an appearance confirmation device for radioactive waste storage containers for confirming the appearance of radioactive waste storage containers for storing radioactive waste.
A housing that forms a flat plate with a predetermined thickness and has a flat surface,
The camera placed in the housing and
The light source arranged in the housing and
It is provided with an optical fiber that is arranged along the side edge of the housing and emits light by light supplied from the light source.
The optical fiber includes at least a first portion extending in a first direction, which is a direction from a base end portion to a tip end portion of the housing, along a first side edge portion of the housing, and a first portion of the housing. Along the second side edge portion, it has a second portion extending in a second direction, which is a direction intersecting with the first direction.
The light source is arranged on the proximal end side of the first portion.
The camera is located on the tip end side of the housing, and is arranged inside the first side edge portion and the second side edge portion of the housing, and the image pickup direction of the camera. Is an appearance confirmation device for a radioactive waste storage container, characterized in that the direction intersects at least the flat surface of the housing. A protrusion extending from the second side edge portion of the housing toward the outside of the housing and protruding so as to overlap the second portion of the optical fiber when viewed from the image pickup direction of the camera. The device for checking the appearance of the radioactive waste storage container according to claim 1, wherein the unit is provided. The optical fiber has a pair of the first portions arranged along the first side edge portion of the housing so as to be parallel to each other, and the tips of the first portions thereof are the first portions thereof. The device for checking the appearance of a radioactive waste storage container according to claim 1 or 2, which is connected by two portions and has a U-shaped bent shape. The camera is arranged on the tip end side of the housing.
The first side edge portion of the housing exposes the housing portion that accommodates the first portion of the optical fiber and blocks light emission to the outside of the housing, and the proximal end side of the first portion of the optical fiber. The device for checking the appearance of a radioactive waste storage container according to any one of claims 1 to 3, which has an opening that enables light emission to the outside of the housing. The camera is an omnidirectional camera having a front lens and a rear lens, and is arranged in the housing so that the front lens faces one side in the thickness direction of the housing and the rear lens faces the other in the thickness direction. The device for checking the appearance of the radioactive waste storage container according to any one of claims 1 to 4. Appearance confirmation of a radioactive waste storage container provided with an appearance confirmation device for any one of the above claims 1 to 5 and a mounting pole to which the appearance confirmation device for the radioactive waste storage container is attached. It ’s a structure,
The mounting pole has a gripping rod that can be gripped by an operator and a rotating rod that is rotatably connected to the gripping rod, and the radioactive waste is stored at the tip of the rotating rod. An appearance confirmation structure for a radioactive waste storage container, characterized in that an appearance confirmation device for the container is attached.

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