JP2023027626A - Shielding material unit - Google Patents

Abstract

To improve the degree of freedom of timing for mounting a shielding material unit to a shielding partition body.SOLUTION: A shielding material unit 10 is mounted to a shielding partition wall 11 formed with a through-hole 11h through which wiring 13 is led out, in order to prevent leakage of radiation from the through hole 11h. The shielding material unit 10 is composed of a plurality of unit bodies 20 that can be connected to each other. Each of the unit bodies 20 includes: a plate-like first member 21 made of a shielding material that shields radiation and facing the shielding partition wall 11; and a second member 22 made of a shielding material that shields radiation and connected to the first member 21. The second member 22 includes an erected portion 32 erected from the first member 21 in an erection direction away from the shielding partition wall 11. The erected portion 32 forms a cylindrical body 35 surrounding the wiring 13 together with the erected portions 32 of the second members 22 of other unit bodies 20, in a state where the plurality of unit bodies 20 are connected to each other.SELECTED DRAWING: Figure 2

Description

The present invention relates to a shielding material unit.

A shielding material unit that shields radiation is used to suppress the leakage of radiation from the inside of a room such as an X-ray room to the outside. For example, the shielding material unit described in Patent Literature 1 is attached to a wiring box arranged inside the wall. A pipe is connected to a through hole formed in the wiring box. Wiring extends in the pipe. The shielding material unit is attached to the joint between the wiring box and the pipe. As a result, the radiation entering the wiring box through the opening of the wiring box is prevented from leaking out of the wiring box.

Japanese Patent Application Laid-Open No. 2006-50860

The walls, ceiling, and floor of a room, such as an X-ray room, are composed of radiation shielding compartments. When installing an outlet, a switch, etc. on the wall surface of a shielding partition wall as a shielding partition body, wiring may be pulled into the room through a through-hole located in the shielding partition wall. Also in this case, it is preferable to attach the shielding material unit to the shielding partition wall in order to suppress radiation leakage through the through-hole of the shielding partition wall. As the shielding unit in this case, for example, one having a cylinder surrounding the wiring and a plate on which the cylinder is erected can be considered. The shielding material unit is used by attaching a plate to the wall surface of the shielding partition wall.

If the shielding material unit is attached to the shielding partition wall after the work of drawing the wiring into the room, it is necessary to insert the cylinder from the tip of the wiring inside the room. If the length of the wiring extending from the through-hole of the shielding partition wall to the inside of the room is long, it takes time for the operator to insert the wiring into the cylinder. Therefore, when the above-described shielding material unit is employed, it is easier for the worker to attach the shielding material unit to the shielding partition wall before the work of drawing in the wiring. It has been desired to improve the degree of freedom in the timing of attaching the shielding material unit to the shielding partition by facilitating the attachment of the shielding material unit to the shielding partition after the work of pulling in the wiring.

A shielding material unit that solves the above problems is a shielding material unit that is attached to a shielding compartment that shields radiation and has through holes through which wires are drawn out, in order to prevent radiation from leaking through the through holes. The shielding material unit is composed of a plurality of mutually connectable unit bodies, the unit body is composed of a shielding material that shields radiation, and is a plate-shaped first member facing the shielding partition. and a second member configured from a shielding material that shields radiation and connected to the first member, wherein the second member extends from the first member in an upright direction away from the shielding partition. a cylindrical body that surrounds the wiring together with the erected portions of the second members of the other unit bodies in a state in which the plurality of unit bodies are connected to each other; The gist is to make

In the shielding material unit, the entire second member may be erected from the first member in the erection direction.
In the shielding material unit, the first member has a first surface facing the shielding partition and a second surface located opposite to the first surface in an orthogonal direction orthogonal to the first surface. An end surface of the second member located on the first member side may be in contact with the second surface.

In the shielding material unit, the first member has a first surface facing the shielding partition, and in a state in which a plurality of the unit bodies are connected to each other, the first member is arranged in an orthogonal direction orthogonal to the first surface. may be provided with a polymer piece overlapping the first member of the unit body.

In the shielding material unit, when a plurality of the unit bodies are connected to each other, a portion where the overlapping pieces of the first members of the other unit bodies overlap is referred to as a superposed portion. One member may include the overlapping piece and the overlapped portion.

In the shielding material unit, the second member may include an overlapping portion in which a plurality of the unit bodies are overlapped with each other in a state where the unit bodies are connected to each other.
In the shielding material unit, the overlapped portion is in the form of a flat plate extending outward from both ends of the standing portion in the circumferential direction of the cylindrical body while the plurality of unit bodies are connected to each other. may

In the shielding material unit, the first member has a first surface facing the shielding partition and a second surface located opposite to the first surface in an orthogonal direction perpendicular to the first surface. The shielding material unit includes a connecting member that connects the first member and the second member, and the connecting member includes a facing portion that faces the second surface, a facing portion that extends from the facing portion, and the a connecting piece protruding from the end of the second member in the erecting direction, wherein the connecting piece is bent by plastic deformation to connect at least the connecting member and the second member of the other unit body. You may connect with one side.

In the shielding material unit, the plurality of unit bodies may have the same shape.

According to this invention, it is possible to improve the degree of freedom in the mounting timing of the shielding material unit to the shielding partition.

FIG. 4 is a cross-sectional view showing a shielding material unit attached to a shielding partition wall; FIG. 3 is a perspective view showing a shielding partition wall and a shielding material unit; FIG. 4 is a cross-sectional view showing a shielding material unit; It is a perspective view which shows a unit body. It is an exploded perspective view showing a unit body. FIG. 4 is a perspective view showing a shielding partition wall and a unit body; It is a perspective view for demonstrating a mode that a connection piece is bent. It is a schematic diagram which shows the 2nd member in the example of a change. It is a schematic diagram which shows the 2nd member in the example of a change.

An embodiment embodying a shielding material unit will be described below with reference to FIGS. 1 to 7. FIG.
[Installation location of the shielding material unit]
As shown in FIG. 1, the shielding material unit 10 is attached to a shielding partition wall 11 as a shielding partition that shields radiation. A wiring 13 penetrates the shielding partition wall 11 . The shield partition wall 11 is a wall that shields radiation. The shielding partition wall 11 is used, for example, as a wall of a room such as an X-ray room. 2 and 6, for convenience of illustration, the shielding partition wall 11 is shown below the shielding material unit 10 in the drawings.

As shown in FIG. 1, the shielding partition wall 11 is formed with a through hole 11h through which the wiring 13 is led out. The wiring 13 extends between the outside of the shielding partition wall 11 and the inside of the room through the through hole 11h. The shielding material unit 10 is attached to prevent leakage of radiation from the through hole 11h.

[Structure of shielding material unit]
As shown in FIGS. 2 and 3, the shielding material unit 10 is composed of a plurality of units 20 that can be connected to each other. The shielding material unit 10 of this embodiment is composed of two unit bodies 20 . All the unit bodies 20 constituting the shielding material unit 10 are hereinafter also referred to as a plurality of unit bodies 20 .

Each of the multiple unit bodies 20 includes a first member 21 and a second member 22 . The first member 21 and the second member 22 are made of a shielding material that shields radiation. The first member 21 has a plate shape facing the shielding partition wall 11 . The 1st member 21 and the 2nd member 22 of this embodiment are comprised from the same shielding material. Lead is used for the shielding material of this embodiment.

The shielding material unit 10 of this embodiment includes a connecting member 23 . The connecting member 23 is made of metal. The connecting member 23 of this embodiment is made of a hot-dip galvanized steel plate. In this embodiment, each of the plurality of unit bodies 20 has a connecting member 23 . The connecting member 23 connects the first member 21 and the second member 22 . Thereby, the second member 22 is connected to the first member 21 .

The plurality of unit bodies 20 have the same shape. Therefore, the plurality of unit bodies 20 have the first member 21, the second member 22, and the connecting member 23 of the same shape.
[Structure of the first member]
Next, the structure of the first member 21 before the plurality of unit bodies 20 are connected to each other will be described.

As shown in FIGS. 4 and 5, the first member 21 has a flat body portion 25 . The body portion 25 has a substantially rectangular shape in plan view. The body portion 25 has a first concave portion 26 in which a portion of the edge portion is concave. The first recess 26 is located midway between the long edges of the body portion 25 . The first recess 26 has a semicircular arc shape.

The first member 21 has a first surface 21 a facing the shielding partition wall 11 . An orthogonal direction orthogonal to the first surface 21a is hereinafter referred to as an orthogonal direction X. As shown in FIG. The first member 21 has a second surface 21b located opposite to the first surface 21a in the orthogonal direction X. As shown in FIG. It should be noted that a plan view of the body portion 25 is to see the body portion 25 in the orthogonal direction X. As shown in FIG. The direction in which the long edge of the body portion 25 extends is also referred to as the first direction Y below. The direction in which the short edges of the body portion 25 extend is also referred to as the second direction Z below. The orthogonal direction X, the first direction Y, and the second direction Z are orthogonal to each other.

The first member 21 includes a tabular overlapping piece 27 . The overlapping piece 27 has a rectangular shape when viewed from the orthogonal direction X. As shown in FIG. The overlapping piece 27 extends in the second direction Z from the long edge portion of the main body portion 25 at one end of the main body portion 25 in the first direction Y. As shown in FIG.

The body portion 25 has a notch 29 at the boundary position with the overlapping piece 27 . The notch 29 is located on the extension of the edge of the overlapping piece 27 . Formation of the notch 29 in the body portion 25 facilitates the displacement of the overlapped piece 27 in the orthogonal direction X. As shown in FIG.

Next, the structure of the first member 21 in a state where a plurality of unit bodies 20 are connected to each other will be described.
As shown in FIG. 2 , the overlapping piece 27 of the first member 21 overlaps the first members 21 of other unit bodies 20 while the plurality of unit bodies 20 are connected to each other. The polymer piece 27 of one unit body 20 rides on the first member 21 of the other unit body 20 . In the orthogonal direction X, the first member 21 of the other unit body 20 is interposed between the overlapping piece 27 of the one unit body 20 and the shielding partition wall 11 .

As shown in FIG. 6 , a portion of the first member 21 on which the overlapped piece 27 overlaps is called an overlapped portion 28 . Each of the first members 21 of the plurality of units 20 includes an overlapping piece 27 and an overlapping portion 28 . That is, the overlapping piece 27 of the first member 21 in one unit body 20 overlaps the overlapped portion 28 of the first member 21 in the other unit body 20 . The overlapping piece 27 of the first member 21 of the other unit body 20 overlaps the overlapped portion 28 of the first member 21 of one unit body 20 . The overlapped portion 28 is located on the opposite side of the body portion 25 from the overlapped piece 27 in the first direction Y. As shown in FIG. In the first direction Y, the first concave portion 26 is positioned between the overlapping piece 27 and the overlapped portion 28 of the body portion 25 .

The first member 21 of one unit body 20 is rotated 180 degrees along the shield partition wall 11 with respect to the first member 21 of the other unit body 20 . A circle is formed by combining the first concave portions 26 of the plurality of unit bodies 20 in a state where the plurality of unit bodies 20 are connected to each other. The diameter of the circle formed by the first concave portions 26 of the plurality of unit bodies 20 is larger than the inner diameter of the through hole 11h of the shielding partition wall 11 . The through holes 11 h of the shielding partition wall 11 and the wires 13 extending from the through holes 11 h are surrounded by the first concave portions 26 of the plurality of unit bodies 20 .

Of the long edges of the main body portion 25 , the end surfaces of the plurality of unit bodies 20 are in contact with each other except for the formation positions of the first concave portions 26 , the overlapping pieces 27 , and the overlapped portions 28 . Thereby, the first members 21 of the plurality of unit bodies 20 cover the through holes 11 h of the shielding partition walls 11 .

[Structure of second member]
Next, the structure of the second member 22 before the plurality of unit bodies 20 are connected to each other will be described.

As shown in FIGS. 4 and 5 , the second member 22 includes an erecting portion 32 erected from the first member 21 in the erecting direction S away from the shielding partition wall 11 . The erecting direction S in this embodiment is the same as the orthogonal direction X. As shown in FIG. The standing portion 32 has a shape in which a cylinder whose axis extends in the standing direction S is divided into two in the circumferential direction. The erected portion 32 has a semicircular arc shape when viewed from the erected direction S. As shown in FIG.

As shown in FIG. 5 , the second member 22 has an overlapping portion 33 . The overlapped portion 33 has a flat plate shape extending from both ends of the standing portion 32 in the first direction Y. As shown in FIG. The overlapped portion 33 of this embodiment has a rectangular shape when viewed from the second direction Z. As shown in FIG. A long edge of the overlapped portion 33 extends in the orthogonal direction X. As shown in FIG. A short edge of the overlapping portion 33 extends in the first direction Y. As shown in FIG. The surface of the overlapped portion 33 that is connected to the inner surface 32a of the erected portion 32 is referred to as an overlapped surface 33a. The surface of the overlapping portion 33 as the back surface of the overlapping surface 33a is referred to as a non-overlapping surface 33b. The overlapping surface 33a and the non-overlapping surface 33b extend orthogonally to the second direction Z. As shown in FIG.

The overlapping portion 33 is erected in the erecting direction S of the erecting portion 32 from the first member 21 . Since both the erected portion 32 and the overlapped portion 33 are erected in the erected direction S, the entire second member 22 is erected in the erected direction S from the first member 21 . The dimension of the overlapping portion 33 in the erecting direction S is the same as the dimension of the erecting portion 32 in the erecting direction S. As shown in FIG.

An end portion of the second member 22 in the erecting direction S is called a tip 22a. The end portion of the second member 22 located on the side opposite to the distal end 22a is referred to as a proximal end 22b. The distal end 22a and the proximal end 22b extend entirely between one end and the other end of the second member 22 in the first direction Y. As shown in FIG. The end surface of the proximal end 22b is in contact with the second surface 21b of the first member 21. As shown in FIG. The end face at the proximal end 22b corresponds to the end face of the second member 22 located on the first member 21 side.

A portion of the proximal end 22 b that is positioned at the standing portion 32 extends along the first concave portion 26 of the main body portion 25 . At least part of the inner surface 32 a of the standing portion 32 may be flush with the end surface of the body portion 25 located in the first recess 26 . The portion of the proximal end 22b positioned at the overlapped portion 33 is the portion of the long edge portion of the main body portion 25 positioned between the overlapped portion 28 and the first concave portion 26 in the first direction Y, and the first and a portion located between the first recess 26 and the overlapping piece 27 in the direction Y. At least part of the overlapping surface 33 a may be flush with the end surface of the main body portion 25 .

Next, the structure of the second member 22 in a state where a plurality of unit bodies 20 are connected to each other will be described.
As shown in FIG. 2 or FIG. 4, the second member 22 of one unit 20 is rotated 180 degrees along the shield partition wall 11 with respect to the second member 22 of the other unit 20. . The erected portion 32 forms a cylindrical body 35 surrounding the wiring 13 together with the erected portion 32 of the second member 22 of the other unit body 20 in a state where the plurality of unit bodies 20 are connected to each other. The inner diameter of the cylindrical body 35 is larger than the inner diameter of the through hole 11 h of the shielding partition wall 11 and the same size as the diameter of the circle formed by the first concave portions 26 of the plurality of unit bodies 20 .

As shown in FIG. 3 , the overlapped portion 33 extends from both ends of the standing portion 32 in the circumferential direction of the cylindrical body 35 toward the outside of the cylindrical body 35 while the plurality of unit bodies 20 are connected to each other. In a state in which the plurality of unit bodies 20 are connected to each other, the overlapping portions 33 of the unit bodies 20 overlap each other. The overlapping surfaces 33a of the overlapping portions 33 are in contact with each other. Since the dimension of the overlapping portion 33 and the dimension of the erecting portion 32 are the same in the erecting direction S, it can be said that the overlapping portion 33 overlaps the entire second member 22 in the erecting direction S.

[Structure of connecting member]
Next, the structure of the connecting member 23 before the unit bodies 20 are connected to each other will be described.

As shown in FIGS. 4 and 5 , the connecting member 23 includes a facing portion 41 and connecting pieces 42 . The facing portion 41 includes a flat first facing portion 51 extending along the first member 21 and a flat second facing portion 52 extending along the second member 22 .

The first facing portion 51 has a substantially rectangular shape when viewed from the orthogonal direction X. As shown in FIG. A long edge portion of the first facing portion 51 extends in the first direction Y. As shown in FIG. A short edge of the first facing portion 51 extends in the second direction Z. As shown in FIG. The area of the first facing portion 51 when viewed from the orthogonal direction X is smaller than that of the main body portion 25 .

The first facing portion 51 has a second recessed portion 53 in which a portion of the edge portion is recessed. The second recess 53 is located in the middle of the long edge of the first facing portion 51 . The second recess 53 has a semicircular arc shape. A first opposing surface 51a, which is one surface of the first opposing portion 51 in the orthogonal direction X, faces the second surface 21b. That is, the facing portion 41 faces the second surface 21b. The first opposing surface 51a extends orthogonally to the orthogonal direction X. As shown in FIG.

The second facing portion 52 extends from the long edge of the first facing portion 51 . The second opposing portions 52 are positioned on both sides of the standing portion 32 in the first direction Y. As shown in FIG. The second facing portion 52 has a substantially rectangular shape when viewed from the second direction Z. As shown in FIG. A long edge portion of the second facing portion 52 extends in the orthogonal direction X. As shown in FIG. A short edge of the second facing portion 52 extends in the first direction Y. As shown in FIG. The dimension in the first direction Y of the second facing portion 52 is smaller than the dimension in the first direction Y of the overlapping portion 33 . A second facing surface 52a, which is one surface of the second facing portion 52, faces the non-overlapping surface 33b. The second opposing surface 52a extends perpendicular to the second direction Z. As shown in FIG.

An insertion hole 52 h may be formed in the second facing portion 52 . 52 h of penetration holes are holes which penetrate the 2nd opposing part 52 in the 2nd direction Z. As shown in FIG. 52 h of insertion holes may be located in the middle of the 2nd opposing part 52 in the orthogonal direction X, for example. The insertion hole 52h may be an elongated hole extending in the orthogonal direction X.

The connecting member 23 is integrated with the first member 21 . The integration of the connecting member 23 and the first member 21 is performed, for example, by bonding the first opposing surface 51a and the second surface 21b to each other with a double-sided tape. The connecting member 23 may be integrated with the second member 22 . The integration of the connecting member 23 and the second member 22 is performed by bonding the second facing surface 52a and the non-overlapping surface 33b to each other with a double-sided tape. By integrating the connecting member 23 with the first member 21 and the second member 22 in this way, the first member 21 and the second member 22 are connected by the connecting member 23 .

As shown in FIG. 4 , the connecting piece 42 extends from the facing portion 41 . Specifically, the connecting piece 42 extends from the end in the orthogonal direction X of one of the second facing portions 52 . The connecting piece 42 protrudes from the tip 22a of the second member 22 in the erecting direction S. As shown in FIG. Specifically, the connecting piece 42 protrudes from a portion of the tip 22 a that is located in the overlapping portion 33 . The connecting piece 42 has a pair of wall portions spaced apart from each other in the first direction Y, and a connecting portion connecting the tips of these wall portions.

In FIG. 7, the connecting pieces 42 before the plurality of unit bodies 20 are connected to each other are indicated by chain double-dashed lines. As shown in FIG. 7 , the connecting piece 42 extends in the orthogonal direction X from the second facing portion 52 .

Next, the structure of the connecting member 23 in a state in which the plurality of unit bodies 20 are connected to each other will be described.
As shown in FIGS. 2 and 7, the connecting member 23 of one unit body 20 is rotated 180 degrees along the shield partition wall 11 with respect to the connecting member 23 of the other unit body 20 . FIG. 7 shows, in solid lines, the connecting pieces 42 that are bent by plastic deformation. FIG. 2 shows the connecting piece 42 after the plurality of units 20 are connected together. The attitude of the connecting piece 42 after the plurality of unit bodies 20 are connected to each other is different from the attitude of the connecting piece 42 before the plurality of unit bodies 20 are connected to each other. The connecting piece 42 connects with at least one of the connecting member 23 and the second member 22 of the other unit body 20 by being bent by plastic deformation. The connecting piece 42 of this embodiment connects with the second opposing portion 52 of the connecting member 23 of the other unit body 20 .

As shown in FIG. 7 , the second facing portion 52 of the other unit body 20 is sandwiched between the tip portion of the connecting piece 42 and the tip portion of the second facing portion 52 of the other unit body 20 . Specifically, between the tip portion of the connecting piece 42 and the tip portion of the second facing portion 52 of one unit body 20, the second facing portion 52 of the other unit body 20 and the plurality of unit bodies 20 are provided. The overlapping portion 33 is located. A portion of the second facing portion 52 sandwiched between the connecting pieces 42 is referred to as a connected portion 54 . The connected portion 54 is located in the second facing portion 52 where the connecting piece 42 does not extend from the end portion in the orthogonal direction X, of the two second facing portions 52 of the unit body 20 . The connected portion 54 is positioned at the tip of the second facing portion 52 in the orthogonal direction X. As shown in FIG. In the first direction Y, the standing portion 32 is positioned between the connected portion 54 and the connecting piece 42 .

Each of the connecting members 23 of the plurality of unit bodies 20 includes a connecting piece 42 and a connected portion 54 . The connecting piece 42 of the connecting member 23 of one unit body 20 sandwiches the connected portion 54 of the connecting member 23 of the other unit body 20 . The connected portion 54 of the connecting member 23 of one unit body 20 is sandwiched between the connecting pieces 42 of the connecting member 23 of the other unit body 20 .

When the plurality of unit bodies 20 are connected to each other, the insertion hole 52h in the second facing portion 52 of one unit body 20 is aligned with the insertion hole 52h in the second facing portion 52 of the other unit body 20 in the second direction. Overlap in Z. Between the insertion hole 52h of one unit body 20 and the insertion hole 52h of the other unit body 20 in the second direction Z, overlapping portions 33 of the plurality of unit bodies 20 are positioned.

[Action]
Next, the operation of this embodiment will be described together with the method of attaching the shielding material unit 10 to the shielding partition wall 11. FIG.

The shielding material unit 10 is integrated by connecting the plurality of unit bodies 20 to each other. The shielding material unit 10 can be attached to the shielding partition wall 11 either before or after the wiring 13 is drawn.

First, the case where the shielding material unit 10 is attached to the shielding partition wall 11 before the wiring 13 is pulled in will be described. In this case, each of the plurality of unit bodies 20 is first attached to the shielding partition wall 11 . When the unit body 20 is attached to the shielding partition wall 11 , the overlapping piece 27 is displaced in the orthogonal direction X and overlaps the overlapped portion 28 of the other unit body 20 . A plurality of unit bodies 20 are installed on the shielding partition wall 11 so that the through holes 11h of the shielding partition wall 11 are surrounded by the first concave portions 26 of the main body portions 25 of the plurality of unit bodies 20 . At this time, each of the plurality of units 20 may be temporarily fixed to the shielding partition wall 11 by bonding the first surface 21a of the first member 21 to the shielding partition wall 11 with double-sided tape or the like.

Then, the connecting piece 42 of the connecting member 23 in each of the plurality of unit bodies 20 is bent by the operator. Since the connecting piece 42 has a shape in which the tips of the pair of wall portions are connected by the connecting portion, it is easier to bend than the flat plate-like connecting piece. By bending the connecting piece 42, the connecting member 23 is connected to the connecting member 23 of the other unit body 20, so that the plurality of unit bodies 20 are connected to each other.

After that, the shielding material unit 10 is attached to the shielding partition wall 11 . The shielding material unit 10 is attached to the shielding partition wall 11 by, for example, attaching the first member 21 to the shielding partition wall 11 with aluminum tape, fixing the first member 21 to the shielding partition wall 11 with screws, or the like. can be done with

Further, a screw may be inserted from the insertion hole 52h of the second facing portion 52. As shown in FIG. The screw forcibly screwed through the insertion hole 52h in one unit 20 passes through the overlapped portion 33 of one unit 20 and is forcibly screwed into the overlapped portion 33 of the other unit 20. be. Thereby, the plurality of unit bodies 20 are connected more firmly. Screws inserted into the insertion holes 52h are preferably made of lead.

After the shielding material unit 10 is attached to the shielding partition wall 11, the wiring 13 is pulled out from the through hole 11h so as to pass through the inside of the cylindrical body 35 composed of the erected portions 32 of the plurality of unit bodies 20. As shown in FIG.
Next, a case where the shielding material unit 10 is attached to the shielding partition wall 11 after the wire 13 is pulled in will be described. In this case, after the wiring 13 is pulled out from the through hole 11h, the unit body 20 is attached to the shielding partition wall 11 so that the standing portion 32 is aligned with the wiring 13 pulled out from the through hole 11h. Note that the unit body 20 attached to the shielding partition wall 11 after the wiring 13 is pulled out may be either one of the plurality of unit bodies 20 or both of the plurality of unit bodies 20 . In the former case, after temporarily fixing one unit 20 to the shielding partition wall 11, the wiring 13 is pulled out from the through hole 11h. The attachment of the unit body 20 to the shielding partition wall 11 is performed in the same manner as before the work of drawing in the wiring 13 described above. By attaching the shielding material unit 10 to the shielding partition wall 11 , the wiring 13 is inserted into the cylindrical body 35 composed of the erected portions 32 of the plurality of unit bodies 20 .

[effect]
According to the above embodiment, the following effects can be obtained.
(1) The shielding material unit 10 is composed of a plurality of units 20 that can be connected to each other. Therefore, the shielding material unit 10 can be easily attached to the shielding partition wall 11 both before and after the wiring 13 is drawn. Since the shielding material unit 10 can be easily attached to the shielding partition wall 11 even after the wiring 13 has been pulled in, the degree of freedom in the attachment timing of the shielding material unit 10 to the shielding partition wall 11 can be improved. .

(2) The entire second member 22 is erected in the erection direction S from the first member 21 . Therefore, the second member 22 does not have a plate-like portion extending along the first member 21 . It is not necessary to bend the second member 22 at the boundary between the portion of the second member 22 along the first member 21 and the standing portion 32 standing in the standing direction S from the first member 21 . Therefore, in the second member 22, it is possible to suppress the thickness of the shielding material from being reduced at the bent portion due to the bending of the shielding material.

(3) The end surface of the proximal end 22b of the second member 22 located on the first member 21 side is in contact with the second surface 21b of the first member 21 . The entire proximal end 22 b of the second member 22 is in contact with the second surface 21 b of the first member 21 . The second member 22 is not bent along the first member 21 from the erected portion 32 forming the cylindrical body 35 together with the other unit bodies 20 . Therefore, it is possible to prevent the shielding ability from decreasing at the bent portion due to the thickness of the shielding material becoming smaller due to the bending.

(4) The first member 21 has overlapping pieces 27 that overlap the first members 21 of other units 20 in the orthogonal direction X. As shown in FIG. Therefore, the overlapping pieces 27 allow the first members 21 to overlap each other. Such overlapped portions of the first members 21 are more difficult for radiation to pass through than the portions where the end surfaces of the first members 21 are in contact with each other. Therefore, since the first member 21 is provided with the overlapping piece 27, it is possible to further suppress radiation leakage from the through hole 11h.

(5) The second member 22 has overlapping portions 33 in which the unit bodies 20 are overlapped with each other in a state where the unit bodies 20 are connected to each other. Therefore, the overlapping portion 33 allows the second members 22 to overlap each other. Such overlapped portions of the second members 22 are more difficult for radiation to pass through than the portions where the end surfaces of the second members 22 are in contact with each other. Therefore, since the second member 22 includes the overlapped portion 33, it is possible to further suppress radiation leakage from the through hole 11h.

(6) The overlapped portion 33 has a flat plate shape extending from both ends of the erected portion 32 in the circumferential direction of the cylindrical body 35 toward the outside of the cylindrical body 35 while the plurality of unit bodies 20 are connected to each other. Therefore, the overlapped portion 33 can be positioned outside the cylindrical body 35 . Compared to the case where the second member 22 includes overlapping portions extending in the circumferential direction of the cylindrical body 35 from both ends of the erected portions 32 in the circumferential direction of the cylindrical body 35, the overlapping area of the overlapping portions 33 can be increased. Therefore, leakage of radiation from the through-hole 11h can be further suppressed.

(7) The connecting piece 42 is connected with the connecting member 23 of the other unit body 20 by being bent by plastic deformation. Therefore, since the unit bodies 20 can be connected to each other by bending the connecting piece 42, the work of connecting the unit bodies 20 can be simplified compared to the case where the unit bodies 20 are connected to each other by screwing.

(8) The plurality of units 20 have the same shape. Therefore, since a plurality of unit bodies 20 can be manufactured without distinction of shape, the efficiency of manufacturing the unit bodies 20 can be improved.

[Change example]
It should be noted that the above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be combined with each other within a technically consistent range.

O The plurality of unit bodies 20 may have different shapes. In this case, at least one of the first member 21 , the second member 22 and the connecting member 23 may be different between the unit bodies 20 .

O The shielding material unit 10 may be composed of three or more unit bodies 20 .
○ As shown in FIG. 8, when the shielding material unit 10 is composed of three unit bodies 20 in the above modified example, the standing portion 32 is formed by dividing a cylinder whose axis extends in the standing direction S into three parts in the circumferential direction. It may be shaped. In this case as well, the erected portion 32 forms the cylindrical body 35 together with the erected portions 32 of the other unit bodies 20 in a state in which the plurality of unit bodies 20 are connected to each other. The overlapped portion 33 may extend outside the tubular body 35 from both ends of the standing portion 32 in the circumferential direction of the tubular body 35 .

○ As shown in FIG. 9 , the overlapped portion 33 is not limited to extending from both ends of the standing portion 32 in the circumferential direction of the cylindrical body 35 to the outside of the cylindrical body 35 . For example, the overlapped portion 33 may extend in the circumferential direction of the cylindrical body 35 from both ends of the standing portion 32 in the circumferential direction of the cylindrical body 35 . In this case, the overlapped portion 33 has a flat plate shape that extends in the circumferential direction of the tubular body 35 and curves.

O The dimension of the overlapped portion 33 in the erecting direction S may be different from the dimension of the erecting portion 32 in the erecting direction S. When the dimension of the overlapping portion 33 in the erecting direction S is smaller than the dimension of the erecting portion 32 in the erecting direction S, a portion of the erecting portion 32 in the erecting direction S has a plurality of unit bodies 20 erected. The end surfaces of the portions 32 may be brought into contact with each other.

O The standing direction S of the standing portion 32 from the first member 21 may be different from the orthogonal direction X.
O The overlapping portion 33 may be omitted from the second member 22 . In this case, the end surfaces of the erected portions 32 of the plurality of unit bodies 20 may be brought into contact with each other.

O Among the plurality of unit bodies 20, the first members 21 of some of the unit bodies 20 may have only the overlapping piece 27, and the first members 21 of the other unit bodies 20 may have only the overlapped portion 28. .
O In some or all of the plurality of unit bodies 20, the formation of the overlapping piece 27 and the overlapped portion 28 on the first member 21 may be omitted.

O The second member 22 may have a flat portion extending along the first member 21 . In this case, the second member 22 may be bent at the boundary between the portion of the second member 22 along the first member 21 and the standing portion 32 . At least a portion of the proximal end 22 b of the second member 22 may not be in contact with the second surface 21 b of the first member 21 .

O The inner diameter of the cylindrical body 35 may be equal to or less than the inner diameter of the through hole 11h of the shielding partition wall 11, or may be different from the diameter of the circle formed by the first concave portions 26 of the plurality of unit bodies 20. In short, the inner diameter of the cylinder 35 can be changed within a range larger than the outer diameter of the wiring 13 .

O The diameter of the circle formed by the first concave portions 26 of the plurality of unit bodies 20 may be equal to or smaller than the inner diameter of the through hole 11h of the shielding partition wall 11 . In short, the diameter of the circle formed by the first concave portions 26 of the plurality of units 20 can be changed within a range larger than the outer diameter of the wiring 13 .

(circle) formation of 52 h of penetration holes to the connection member 23 may be abbreviate|omitted.
O In each of the plurality of unit bodies 20 , the connecting member 23 may have one second facing portion 52 . Also in this case, if the connecting member 23 is provided with the connecting piece 42 extending from the second facing portion 52 , the unit bodies 20 can be connected to each other by bending the connecting piece 42 . Also, the connecting piece 42 may extend from the end in the first direction Y of the second facing portion 52 instead of the end in the orthogonal direction X of the second facing portion 52 .

(circle) the 2nd member 22 may be sufficient as the connection part by the connection piece 42, and both the 2nd member 22 and the connection member 23 may be sufficient as it. In short, the connecting piece 42 should be connected to at least one of the connecting member 23 and the second member 22 of the other unit body 20 by being bent by plastic deformation.

(circle) the connection piece 42 may be a shape different from the said embodiment, such as flat plate shape.
O The connecting piece 42 may be omitted from the connecting member 23 . In this case, the units 20 are connected to each other by means other than the connecting piece 42, such as screwing.

(circle) the connection member 23 may be comprised from metals other than a hot-dip galvanized steel plate.
(circle) the shielding material which comprises the 1st member 21, and the shielding material which comprises the 2nd member 22 may be a different material. At least one of the first member 21 and the second member 22 may be made of a shielding material other than lead. Examples of the shielding material in this case include iron and tungsten.

O The shielding partition body may be a shielding partition ceiling that shields radiation, or a shielding partition floor that shields radiation.

S... Upright direction X... Orthogonal direction 10... Shielding material unit 11... Shielding partition wall as a shielding partition 11h... Through hole 13... Wiring 20... Unit body 21... First member 21a... First surface 21b Second surface 22 Second member 22a Distal end 22b Base end 23 Connecting member 27 Overlapping piece 28 Superimposed portion 32 Standing portion 33 Polymerization Part, 35... Cylindrical body, 41... Opposing part, 42... Connecting piece.

Claims (9)

A shielding material unit attached to a radiation-shielding shielding partition having a through-hole through which wiring is drawn out to prevent radiation from leaking from the through-hole,
The shielding material unit is composed of a plurality of unit bodies that can be connected to each other,
The unit body is
a plate-shaped first member made of a shielding material that shields radiation and facing the shielding partition;
a second member composed of a shielding material that shields radiation and connected to the first member;
the second member includes an erection portion erected from the first member in an erection direction away from the shielding partition;
A shielding material characterized in that, in a state in which a plurality of said unit bodies are connected to each other, said standing portion forms a tubular body surrounding said wiring together with said standing portion of said second member of another unit body. unit. 2. The shielding material unit according to claim 1, wherein the entire second member is erected from the first member in the erection direction. The first member has a first surface facing the shielding partition and a second surface located opposite to the first surface in an orthogonal direction perpendicular to the first surface,
3. The shielding material unit according to claim 1, wherein an end surface of the second member located on the first member side is in contact with the second surface. The first member has a first surface facing the shielding partition, and in a state in which a plurality of the unit bodies are connected to each other, the other unit bodies in an orthogonal direction orthogonal to the first surface. 4. The shielding material unit according to any one of claims 1 to 3, comprising a polymerized piece that overlaps the first member. In a state in which a plurality of the unit bodies are connected to each other, a portion where the polymer piece of the first member of the other unit body overlaps is called a superposed portion.
5. The shielding material unit according to claim 4, wherein the first member of the plurality of units includes the overlapping piece and the overlapped portion. 6. The shielding material unit according to any one of claims 1 to 5, wherein the second member includes an overlapping portion in which the unit bodies are overlapped with each other in a state where the unit bodies are connected to each other. 7. The overlapped portion according to claim 6, wherein the overlapping portion has a flat plate shape extending outward from both ends of the standing portion in the circumferential direction of the cylindrical body while the plurality of unit bodies are connected to each other. shielding unit. The first member has a first surface facing the shielding partition and a second surface located opposite to the first surface in an orthogonal direction perpendicular to the first surface,
The shielding material unit includes a connecting member that connects the first member and the second member,
The connecting member includes a facing portion facing the second surface, and a connecting piece extending from the facing portion and protruding from an end of the second member in the erecting direction,
The shield according to any one of claims 1 to 7, wherein the connecting piece is bent by plastic deformation to connect with at least one of the connecting member and the second member of the other unit body. material unit. The shielding material unit according to any one of claims 1 to 8, wherein the plurality of unit bodies have the same shape as each other.

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