Attachment body and method for installing attachment body

Abstract

To easily prevent leakage of a leakage object from a bolt hole formed in an attachment body.SOLUTION: An attachment body 10 is provided between a foundation ceiling and a compartment ceiling 12 spaced from the foundation ceiling. The attachment body 10 is attached to a bolt body 16 inserted into a bolt hole 12h formed in the compartment ceiling 12. The attachment body 10 has a main body 20 and a prevention body 40 integrated with each other. The main body 20 is provided with an attachment part 24 which can be attached to the bolt body 16 by engaging with a shaft part 17 of the bolt body 16. The prevention body 40 surrounds the bolt body 16 to prevent leakage of radioactive rays from the bolt hole 12h.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an attachment body and a method for installing the attachment body.

Background Art

[0002] For the purpose of installing lighting fixtures or the like, a bolt body is passed through a partition body that is installed at a distance from a base member. For example, Patent Document 1 discloses a double ceiling composed of a ceiling base material as a base member and a ceiling finishing board as a partition body. In this double ceiling, a suspension bolt as a bolt body is passed through the ceiling finishing board. By attaching a lighting fixture to the suspension bolt, the lighting fixture is suspended and supported.

[0003] In addition, leakage of leakage targets such as electromagnetic waves, radiation, sound, and heat is prevented. For example, Patent Document 1 discloses a structure for preventing electromagnetic wave leakage. In this structure, an electromagnetic shielding material is provided on the upper part of the ceiling base material. A cut is formed in a portion of the electromagnetic shielding material corresponding to the suspension bolt. After inserting the suspension bolt through this cut, the electromagnetic shielding material around the insertion portion of the suspension bolt is fixed to the suspension bolt with an adhesive tape, a binding wire, or the like. Patent Document 2 discloses a structure for preventing radiation leakage. In this structure, the wall panel and the ceiling panel are provided with lead plates. Lead plates for closing these gaps are provided in the gaps between the ceiling panels and in the gaps between the ceiling panel and the wall panel. Patent Document 3 discloses a structure for preventing sound leakage. In this structure, a plurality of sound absorbers are provided between a base ceiling and a ceiling board installed at a distance from the base ceiling.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] When passing a bolt body through a partition body installed at a distance from a base member, it is preferable to adopt a structure for preventing leakage of a leakage target from an insertion position of the bolt body in the partition body. However, in the structure described in Patent Document 1, since the electromagnetic shielding material has to be fixed to the suspension bolt with an adhesive tape, a binding wire, etc., it is troublesome. Further, in the structure described in Patent Document 2, since a lead plate has to be incorporated into the insertion position of the bolt body, it is troublesome. Furthermore, in the structure described in Patent Document 3, since the sound absorber has to be installed so that the boundary of the sound absorber passes through the bolt body, it is troublesome. Although the sound absorber may be removed from the position where the bolt body passes, in this case, there is a risk that the leakage target leaks from the insertion position of the bolt body in the partition body.

Means for Solving the Problems

[0006] The attachment body for solving the above problems is an attachment body provided between a base member and a partition body installed at a distance from the base member, and is an attachment body attached to a bolt body inserted into a bolt hole formed in the partition body, and includes a main body and a prevention body integrated with each other. The main body includes an attachment portion that can be attached to the bolt body by engaging with a shaft portion of the bolt body, and the prevention body surrounds the bolt body so as to prevent leakage of a leakage target from the bolt hole.

[0007] In the attachment body, when a force in a direction from the partition body toward the base member in the axial direction of the bolt body is applied to the main body in a state where the attachment portion is attached to the bolt body, the attachment body may allow the main body to move along the bolt body in the direction of the force applied to the main body.

[0008] In the attachment body, the main body includes a cylindrical portion surrounding the bolt body, and the attachment portion includes a plurality of elastic pieces that extend from the cylindrical portion toward the bolt body and form a communication hole that communicates with the inside of the cylindrical portion by being positioned so as to surround the bolt body. The plurality of elastic pieces may engage with the shaft portion so as to allow the shaft portion to enter the inside of the cylindrical portion from the communication hole and restrict the shaft portion from exiting the cylindrical portion from the communication hole.

[0009] In the attachment body, when a force is applied to the prevention body in the direction from the partition body toward the base member in the axial direction of the bolt body in a state where the attachment portion is attached to the bolt body, it is preferable that relative movement of the prevention body with respect to the main body is possible in the direction of the force applied to the prevention body.

[0010] In the attachment body, the prevention body has a cylindrical member that houses a part of the shaft portion and extends in the axial direction of the bolt body, and the bolt body may be inserted through an opening end of the cylindrical member. In the attachment body, the main body preferably includes a cylindrical overlapping cylinder portion that overlaps at least one of the outer peripheral surface and the inner peripheral surface of the cylindrical member.

[0011] In the attachment body, the prevention body has an edge member that is positioned such that one surface is along the partition body, and the bolt body may be inserted through a through hole that faces the bolt hole in the axial direction of the bolt body and penetrates the edge member in the axial direction of the bolt body.

[0012] In the attachment body, the edge member has a first surface that is one surface in the axial direction of the bolt body and a second surface that is positioned opposite to the first surface in the axial direction of the bolt body. The first surface is positioned along the partition body, and the main body preferably includes an overlapping surface portion that overlaps at least one of the first surface and the second surface.

[0013] In the attachment body, the prevention body preferably includes a radiation shielding material capable of shielding radiation. In the attachment body, the prevention body has a cylindrical member that houses a part of the shaft portion and extends in the axial direction of the bolt body, and a plate-shaped along member. The along member has a first surface that is one surface in the axial direction of the bolt body and a second surface that is located opposite to the first surface in the axial direction of the bolt body. The first surface is positioned along the partitioning body. The cylindrical member and the along member are separate from each other and are made of a radiation shielding material capable of shielding radiation. The bolt body is inserted into an opening end of the cylindrical member and a through hole that faces the bolt hole in the axial direction of the bolt body and penetrates the along member in the axial direction of the bolt body. The cylindrical member may be formed by winding a belt-like body into a cylinder and may be in contact with the second surface.

[0014] In the attachment body, the attachment portion can be engaged with the shaft portion by screwing into a screw groove of the shaft portion. The main body has a recess that faces the bolt hole in the axial direction of the bolt body. By rotating the main body in the circumferential direction of the bolt body with a tool inserted into the recess through the bolt hole, the main body may move in the direction from the base member toward the partitioning body in the axial direction of the bolt body.

[0015] The method for installing the attaching body for solving the above problems is any of the above methods for installing the attaching body. In the axial direction of the bolt body, the direction from the partitioning body toward the base member is referred to as the first direction, and the direction from the base member toward the partitioning body is referred to as the second direction. Before installing the partitioning body, the attaching body is attached to the bolt body and temporarily installed so that the end of the attaching body in the second direction is displaced in the second direction from the installation position of the partitioning body in the axial direction of the bolt body. When installing the partitioning body, while inserting the bolt body into the bolt hole, a force in the first direction is applied to the partitioning body, so that the partitioning body is moved in the first direction to the installation position, and the partitioning body moves to the installation position in a state where the end of the attaching body in the second direction is in contact with the partitioning body, thereby permanently installing the attaching body in the first mode or the second mode. In the first mode, while the attachment position of the attachment portion to the bolt body is displaced, the attaching body moves in the first direction along the bolt body. In the second mode, the gist is that the attachment position of the attachment portion to the bolt body does not displace, and the preventing body moves in the first direction along the bolt body.

Effect of the Invention

[0016] According to this invention, leakage of the object to be leaked from the bolt hole formed in the partitioning body can be easily prevented.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

BEST MODE FOR CARRYING OUT THE INVENTION

[0018] Hereinafter, one embodiment in which the attachment body is embodied will be described with reference to FIGS. 1 to 10. <Installation Location of the Attachment Body> As shown in FIG. 1, the attachment body 10 is provided between a base ceiling 11 as a base member and a partition ceiling 12 as a partition member. The partition ceiling 12 is installed at a distance from the base ceiling 11. A double ceiling is formed by the base ceiling 11 and the partition ceiling 12. The partition ceiling 12 may be formed of a radiation shielding material that shields radiation. In this case, the partition ceiling 12 is a ceiling that shields radiation. The partition ceiling 12 is used, for example, as the ceiling of a room such as an X-ray room. As the radiation shielding material constituting the partition ceiling 12, for example, materials capable of shielding X-rays and γ-rays such as lead and iron, materials capable of shielding neutrons such as polyethylene and boron-containing polyethylene, and materials combining these materials can be used.

[0019] Between the base ceiling 11 and the partition ceiling 12, a first support tool 13 and a second support tool 14 may be provided. The first support tool 13 is connected to the partition ceiling 12. The second support tool 14 is connected to the first support tool 13 and the base ceiling 11. In this way, the partition ceiling 12 is supported by the base ceiling 11 by the first support tool 13 and the second support tool 14.

[0020] The attachment body 10 is attached to the bolt body 16. The bolt body 16 includes a columnar shaft portion 17. A thread groove 17a is formed on the surface of the shaft portion 17. The direction in which the shaft portion 17 extends is referred to as the axial direction of the bolt body 16. Hereinafter, the axial direction of the bolt body 16 is referred to as the axial direction X. A part of the shaft portion 17 is located between the base ceiling 11 and the partition ceiling 12 in the axial direction X. The attachment body 10 is attached to the portion of the shaft portion 17 that is located between the base ceiling 11 and the partition ceiling 12.

[0021] In the axial direction X, the direction approaching the base ceiling 11 from the partition ceiling 12 is also referred to as the first direction X1. In the axial direction X, the direction from the base ceiling 11 toward the partition ceiling 12 is also referred to as the second direction X2. In the present embodiment, the second direction X2 corresponds to the direction of gravity. The partition ceiling 12 is in a flat plate shape. The partition ceiling 12 has a first partition surface 12a that is a surface in the first direction X1 and a second partition surface 12b that is a surface in the second direction X2. The first partition surface 12a and the second partition surface 12b extend so as to be orthogonal to the axial direction X.

[0022] A gripping portion 18 may be provided at the end of the bolt body 16 in the first direction X1. The gripping portion 18 grips the second support tool 14. Thereby, the bolt body 16 having the gripping portion 18 at the end is supported by the base ceiling 11 via the gripping portion 18 and the second support tool 14. A gripping portion 18 may not be provided at the end of the bolt body 16 in the first direction X1. In this case, the end of the bolt body 16 is fixed to the base ceiling 11. In FIG. 1, two bolt bodies 16 are illustrated, but the number of bolt bodies 16 is not limited to this. Among the two bolt bodies 16 shown in FIG. 1, the bolt body 16 shown on the right side does not have a gripping portion 18 at the end, and the end is fixed to the base ceiling 11. Among the two bolt bodies 16 shown in FIG. 1, a gripping portion 18 is provided at the end of the bolt body 16 shown on the left side.

[0023] The partition ceiling 12 is formed with bolt holes 12h. The bolt holes 12h are holes that penetrate between the first partition surface 12a and the second partition surface 12b. The bolt holes 12h are round holes. The bolt body 16 is inserted through the bolt holes 12h. The bolt holes 12h are formed in the partition ceiling 12 in the same number as the bolt bodies 16 provided between the base ceiling 11 and the partition ceiling 12. The shaft portion 17 of the bolt body 16 is inserted through each of the plurality of bolt holes 12h.

[0024] The end portion of the shaft portion 17 in the second direction X2 corresponds to the end portion of the bolt body 16 in the second direction X2. The end portion of the shaft portion 17 in the second direction X2 extends from the bolt hole 12h in the second direction X2. An instrument 15 is fixed to the end portion of the shaft portion 17 in the second direction X2. The instrument 15 is, for example, a lighting fixture. The instrument 15 is supported by the base ceiling 11 by the bolt body 16. The instrument 15 is installed along the second partition surface 12b of the partition ceiling 12.

[0025] <Basic configuration of the attachment body> As shown in FIGS. 2 and 3, the attachment body 10 includes a main body 20 and a prevention body 40. The main body 20 and the prevention body 40 are separate bodies. By accommodating the prevention body 40 inside the main body 20, the main body 20 and the prevention body 40 are integrated with each other.

[0026] <Configuration of the main body> As shown in FIGS. 3 and 4, the main body 20 includes a first main body portion 21 and a second main body portion 22. The first main body portion 21 and the second main body portion 22 in the present embodiment are made of polyethylene. The first main body portion 21 includes a cylindrical portion 23, an attachment portion 24, and a base portion 25. In other words, the main body 20 includes a cylindrical portion 23, an attachment portion 24, and a base portion 25.

[0027] The cylindrical portion 23 includes a first cylindrical portion 23a and a plurality of protruding portions 23b. The first cylindrical portion 23a has a cylindrical shape with an axis extending in the axial direction X. The first cylindrical portion 23a accommodates a part of the shaft portion 17 of the bolt body 16. Thereby, the cylindrical portion 23 surrounds the bolt body 16.

[0028] The plurality of protrusions 23b protrude from the end of the first cylindrical portion 23a in the first direction X1 in the first direction X1. The plurality of protrusions 23b are spaced apart from each other at equal intervals in the circumferential direction of the bolt body 16. Note that the circumferential direction of the bolt body 16 refers to the circumferential direction of the shaft portion 17. The circumferential direction of the bolt body 16 is also the circumferential direction of the cylindrical portion 23. The cylindrical portion 23 in the present embodiment includes three protrusions 23b. The protrusion 23b constitutes the end of the attaching body 10 in the first direction X1.

[0029] The attaching portion 24 can be attached to the bolt body 16 by engaging with the shaft portion 17 of the bolt body 16. The attaching portion 24 is composed of a plurality of elastic pieces 24a. The plurality of elastic pieces 24a are spaced apart from each other at equal intervals in the circumferential direction of the bolt body 16. The main body 20 in the present embodiment includes three elastic pieces 24a. Note that the number of elastic pieces 24a provided in the main body 20 may be more than three or less than three.

[0030] The plurality of elastic pieces 24a extend from the cylindrical portion 23 toward the bolt body 16. Specifically, each of the plurality of elastic pieces 24a extends in the radial direction of the first cylindrical portion 23a from the end of the protrusion 23b in the first direction X1. Among the plurality of elastic pieces 24a, the end connected to the protrusion 23b is referred to as the first end 24b. With the first end 24b as the base end, the tips of the plurality of elastic pieces 24a in the radial direction of the first cylindrical portion 23a are referred to as the second end 24c.

[0031] As shown in FIG. 5, when the main body 20 is viewed from the first direction X1, each of the plurality of elastic pieces 24a is substantially fan-shaped. The elastic piece 24a has a smaller dimension in the circumferential direction of the bolt body 16 as it approaches the second end 24c from the first end 24b.

[0032] As shown in FIG. 3, the plurality of elastic pieces 24a are positioned so as to surround the bolt body 16. The second ends 24c of the plurality of elastic pieces 24a surround the shaft portion 17 of the bolt body 16. Thereby, the plurality of elastic pieces 24a form a communication hole 24h that communicates with the inside of the cylindrical portion 23. The communication hole 24h is a round hole partitioned by the second ends 24c of the plurality of elastic pieces 24a.

[0033] The attachment portion 24 can be engaged with the shaft portion 17 by being screwed into the screw groove 17a of the shaft portion 17. The second ends 24c of the plurality of elastic pieces 24a are engaged with the screw groove 17a. When the second ends 24c are engaged with the screw groove 17a, the plurality of elastic pieces 24a are attached to the bolt body 16.

[0034] Each of the plurality of elastic pieces 24a is curved so that a portion closer to the second end 24c from the first end 24b is positioned in the second direction X2. Due to such a curved shape, the elastic piece 24a is easily deformed so that the second end 24c is displaced in the second direction X2 starting from the first end 24b, while it is difficult to be deformed so that the second end 24c is displaced in the first direction X1.

[0035] The shaft portion 17 of the bolt body 16 is inserted into the inside of the cylindrical portion 23 from the communication hole 24h. The plurality of elastic pieces 24a are engaged with the shaft portion 17 so as to allow the intrusion of the shaft portion 17 from the communication hole 24h into the inside of the cylindrical portion 23. The plurality of elastic pieces 24a are engaged with the shaft portion 17 so as to restrict the withdrawal of the shaft portion 17 from the communication hole 24h to the outside of the cylindrical portion 23.

[0036] As shown in FIGS. 3 and 6, the base portion 25 includes a first base portion 26 and a second base portion 27. The first base portion 26 is located around the end portion of the cylindrical portion 23 in the second direction X2. The first base portion 26 has a square frame shape. The first base portion 26 extends curvedly between the end portion of the cylindrical portion 23 in the second direction X2 and the second base portion 27.

[0037] As shown in FIG. 3, the second base portion 27 is in a rectangular flat plate shape extending in the second direction X2 from each of the four edge portions of the first base portion 26. A part of the second base portion 27 serves as a locking claw 27a. The locking claw 27a of the present embodiment is located on the second base portion 27 extending from two edge portions facing each other in the first base portion 26. Two locking claws 27a are provided on the second base portion 27.

[0038] The second main body portion 22 includes a placement portion 31, a standing portion 32, and a second cylindrical portion 33. The placement portion 31 is in the shape of a rectangular flat plate. Both surfaces of the placement portion 31 in the axial direction X extend so as to be orthogonal to the axial direction X.

[0039] A hole portion 31h is formed at the center of the placement portion 31. The hole portion 31h is a round hole that penetrates the placement portion 31 in the axial direction X. The diameter of the hole portion 31h is smaller than the diameter of the bolt hole 12h of the partition ceiling 12. The placement portion 31 is placed on the first partition surface 12a of the partition ceiling 12 so that the hole portion 31h overlaps the bolt hole 12h in the axial direction X. At this time, the portion of the placement portion 31 around the hole portion 31h covers the bolt hole 12h. The placement portion 31 constitutes the end portion of the attachment body 10 in the second direction X2.

[0040] A placement recess 31g is formed at the edge portion of the placement portion 31 that defines and forms the hole portion 31h. The placement recess 31g penetrates the placement portion 31 in the axial direction X. The placement recesses 31g are located at four positions around the hole portion 31h. When the partition ceiling 12 and the second main body portion 22 are viewed from the second direction X2, some or all of the placement recesses 31g are located inside the bolt hole 12h.

[0041] The standing portion 32 stands upright in the first direction X1 from two opposing edge portions among the four edge portions of the placement portion 31. A locked portion 32a is formed on a part of the standing portion 32. The locked portion 32a has a shape that is recessed more than the portion of the standing portion 32 other than the locked portion 32a. In the present embodiment, two locked portions 32a are provided on the standing portion 32. A part of the end portion of the standing portion 32 in the first direction X1 may be in contact with the first base portion 26 of the first main body portion 21.

[0042] The second cylindrical portion 33 is cylindrical with its axis extending in the axial direction X. The outer diameter of the second cylindrical portion 33 is smaller than the inner diameter of the first cylindrical portion 23a. The second cylindrical portion 33 houses a part of the shaft portion 17 of the bolt body 16. Thereby, the second cylindrical portion 33 surrounds the bolt body 16.

[0043] The second cylindrical portion 33 is provided with a concave portion 33h. In other words, the main body 20 is provided with the concave portion 33h. The concave portion 33h is recessed from the end portion of the second cylindrical portion 33 in the second direction X2 toward the first direction X1. The concave portion 33h penetrates the second cylindrical portion 33 in the radial direction of the second cylindrical portion 33. The concave portions 33h are formed at four positions of the second cylindrical portion 33. The concave portions 33h are equally spaced from each other in the circumferential direction of the bolt body 16. The concave portion 33h communicates with the mounting concave portion 31g. The concave portion 33h faces the bolt hole 12h of the partition ceiling 12 in the axial direction X.

[0044] The locking claw 27a of the first main body portion 21 can be locked to the locked portion 32a of the second main body portion 22. By bringing the first main body portion 21 and the second main body portion 22 closer to each other so that the locking claw 27a covers the locked portion 32a, the locking claw 27a is locked to the locked portion 32a. When the locking claw 27a is locked to the locked portion 32a, the first main body portion 21 and the second main body portion 22 are integrated. The internal space of the main body 20 is partitioned by the first main body portion 21 and the second main body portion 22.

[0045] In a state where the first main body portion 21 and the second main body portion 22 are integrated, the periphery of the second main body portion 22 is surrounded by the first main body portion 21. From the outside in the radial direction of the second cylindrical portion 33, the second base portion 27 overlaps the standing portion 32 and the edge portion of the mounting portion 31. The mounting portion 31 and the first base portion 26 face each other in the axial direction X. The second cylindrical portion 33 is accommodated in the cylindrical portion 23. When the main body 20 is viewed from the first direction X1, the communication hole 24h of the first main body portion 21, the inside of the second cylindrical portion 33, and the hole portion 31h of the mounting portion 31 are arranged in line in the axial direction X.

[0046] <Configuration of the prevention body> The shielding body 40 is located on the end side of the attachment body 10 in the second direction X2 with respect to the attachment portion 24. The shielding body 40 includes a cylindrical member 41 and a following member 42. The cylindrical member 41 houses a part of the shaft portion 17. The cylindrical member 41 and the following member 42 are separate from each other and are made of a radiation shielding material capable of shielding radiation. As the radiation shielding material constituting the cylindrical member 41 and the following member 42, for example, materials capable of shielding X-rays and γ-rays such as lead and iron, materials capable of shielding neutrons such as polyethylene and boron-containing polyethylene, and materials combining these materials can be used. The cylindrical member 41 and the following member 42 of the present embodiment are both made of lead.

[0047] The cylindrical member 41 is cylindrical and extends in the axial direction X. The cylindrical member 41 is formed by winding a belt-like body 41e into a cylindrical shape. The belt-like body 41e is a base material of the cylindrical member 41 made of lead. The belt-like body 41e before being wound is in a rectangular flat plate shape. The longitudinal direction of the belt-like body 41e coincides with the circumferential direction of the bolt body 16. One end in the longitudinal direction of the belt-like body 41e is located inside the cylindrical member 41, and the other end is located outside the cylindrical member 41. The short side direction of the belt-like body 41e coincides with the axial direction X.

[0048] The cylindrical member 41 is provided with open ends 41h at both ends in the axial direction X. The open end 41h located at the end of the cylindrical member 41 in the first direction X1 is also referred to as the first open end 41a. The open end 41h located at the end of the cylindrical member 41 in the second direction X2 is also referred to as the second open end 41b. The dimension of the cylindrical member 41 in the axial direction X is set to a dimension capable of shielding scattered rays entering the inside of the cylindrical member 41 from the open end 41h.

[0049] The following member 42 is in a rectangular plate shape. The following member 42 has a first surface 42a and a second surface 42b. The first surface 42a is one surface of the following member 42 in the axial direction X. The second surface 42b is the surface of the following member 42 located opposite to the first surface 42a in the axial direction X. The first surface 42a and the second surface 42b are planes extending so as to be orthogonal to the axial direction X. The first surface 42a is located along the partition ceiling 12.

[0050] The along member 42 is formed with a through hole 42h. The through hole 42h is located at the center of the along member 42. The through hole 42h penetrates the along member 42 in the axial direction X. The through hole 42h is a round hole. The diameter of the through hole 42h is smaller than the diameter of the bolt hole 12h of the partition ceiling 12. The through hole 42h faces the bolt hole 12h in the axial direction X.

[0051] As shown in FIG. 7, the cylindrical member 41 is located on the along member 42. The cylindrical member 41 is in contact with the second surface 42b of the along member 42. The end surface at the second opening end 41b of the cylindrical member 41 and the second surface 42b of the along member 42 may be connected by an adhesive or the like, so that the cylindrical member 41 and the along member 42 may be integrated.

[0052] As shown in FIG. 6, the second opening end 41b of the cylindrical member 41 and the through hole 42h of the along member 42 face each other in the axial direction X. The shaft portion 17 of the bolt body 16 is inserted through the opening end 41h of the cylindrical member 41 and the through hole 42h of the along member 42. The cylindrical member 41 and the along member 42 surround the shaft portion 17. Thereby, the shielding body 40 surrounds the bolt body 16 so as to prevent leakage of radiation that is a leakage target from the bolt hole 12h of the partition ceiling 12.

[0053] <Position relationship between the main body and the shielding body> As shown in FIG. 3, the along member 42 is placed on the placement portion 31 so that the through hole 42h overlaps the hole portion 31h in the axial direction X. A second cylindrical portion 33 is inserted through the through hole 42h of the along member 42. At this time, among the along member 42, the portion around the through hole 42h covers the bolt hole 12h through the placement portion 31. With the along member 42 positioned on the placement portion 31, the cylindrical member 41 and the along member 42 are accommodated inside the main body 20.

[0054] The cylindrical member 41 is positioned between the first cylindrical portion 23a of the first main body portion 21 and the second cylindrical portion 33 of the second main body portion 22 in the radial direction of the cylindrical member 41. In the radial direction of the cylindrical member 41, the first cylindrical portion 23a overlaps with the outer peripheral surface 41c of the cylindrical member 41. In the radial direction of the cylindrical member 41, the second cylindrical portion 33 overlaps with the inner peripheral surface 41d of the cylindrical member 41. In the present embodiment, the first cylindrical portion 23a and the second cylindrical portion 33 correspond to the cylindrical overlapping cylindrical portions. That is, it can be said that the main body 20 includes the cylindrical overlapping cylindrical portions that overlap with the outer peripheral surface 41c and the inner peripheral surface 41d of the cylindrical member 41. The cylindrical member 41 may be in contact with or separated from at least one of the first cylindrical portion 23a and the second cylindrical portion 33. The cylindrical member 41 may be partially in contact with the first cylindrical portion 23a and the second cylindrical portion 33.

[0055] The along member 42 is positioned between the two standing portions 32. The along member 42 is positioned between the first base portion 26 of the first main body portion 21 and the placement portion 31 of the second main body portion 22 in the axial direction X. In the axial direction X, the first base portion 26 overlaps with the second surface 42b of the along member 42. In the axial direction X, the placement portion 31 overlaps with the first surface 42a of the along member 42. In the present embodiment, the first base portion 26 and the placement portion 31 correspond to the overlapping surface portions. That is, it can be said that the main body 20 includes the overlapping surface portions that overlap with the first surface 42a and the second surface 42b. Although the along member 42 is separated from the first base portion 26, a part or the whole of the second surface 42b of the along member 42 may be in contact with the first base portion 26.

[0056] <Installation Method of Attachment Body to Bolt Body> Next, the installation method of the attachment body 10 to the bolt body 16 will be described. The installation of the attachment body 10 to the bolt body 16 is performed before installing the partition ceiling 12 on the bolt body 16. Note that the installation of the attachment body 10 to the bolt body 16 may be performed either before or after supporting the bolt body 16 on the base ceiling 11. Hereinafter, the case of installing the attachment body 10 to the bolt body 16 after being supported on the base ceiling 11 will be described.

[0057] As shown in FIGS. 2 and 8, when installing the attachment body 10 to the bolt body 16, the attachment body 10 is attached to the bolt body 16 for temporary installation. The shaft portion 17 of the bolt body 16 is inserted into the inside of the cylindrical portion 23 from the communication hole 24h. At this time, while the second end portions 24c of the plurality of elastic pieces 24a are engaged with the shaft portion 17, the shaft portion 17 is relatively displaced in the second direction X2 with respect to the main body 20. Along with this relative displacement of the shaft portion 17, deformation of the elastic piece 24a occurs such that the second end portion 24c is displaced in the second direction X2 starting from the first end portion 24b. Thereby, when the shaft portion 17 is inserted into the inside of the cylindrical portion 23, the relative displacement of the shaft portion 17 with respect to the main body 20 is not easily inhibited by the plurality of elastic pieces 24a. Thus, the plurality of elastic pieces 24a engage with the shaft portion 17 so as to allow the shaft portion 17 to enter from the communication hole 24h into the inside of the cylindrical portion 23.

[0058] As shown in FIGS. 2 and 9, when the temporary installation of the attachment body 10 to the bolt body 16 is completed, the placement portion 31, which is the end portion of the attachment body 10 in the second direction X2, is at a position shifted in the second direction X2 from the installation position P1 of the partition ceiling 12 in the axial direction X. That is, the attachment body 10 is temporarily installed on the bolt body 16 at a position shifted in the second direction X2 from such an installation position P1. Note that the installation position P1 corresponds to the target position in the axial direction X of the first partition surface 12a of the partition ceiling 12 when the partition ceiling 12 is attached to the bolt body 16.

[0059] In addition, when the shaft portion 17 of the bolt body 16 attempts to displace so as to protrude from the communication hole 24h to the outside of the cylindrical portion 23 with the shaft portion 17 of the bolt body 16 inserted into the inside of the cylindrical portion 23, the shaft portion 17 attempts to relatively displace in the first direction X1 with respect to the main body 20. At this time, since it is difficult for the elastic piece 24a to deform such that the second end portion 24c is displaced in the first direction X1 starting from the first end portion 24b, the engagement position of the elastic piece 24a with respect to the shaft portion 17 is difficult to displace as the shaft portion 17 relatively displaces in the first direction X1. Thus, the plurality of elastic pieces 24a engage with the shaft portion 17 so as to restrict the withdrawal of the shaft portion 17 from the communication hole 24h to the outside of the cylindrical portion 23. Since it is difficult for the elastic piece 24a to deform such that the second end portion 24c is displaced in the first direction X1, displacement of the attachment body 10 in the second direction X2 due to the self-weight of the attachment body 10 is unlikely to occur, and thus it is possible to prevent the attachment body 10 from falling off the shaft portion 17.

[0060] <Method for installing a partition ceiling on a bolt body> Next, a method for installing the partition ceiling 12 on the bolt body 16 will be described. The installation of the partition ceiling 12 on the bolt body 16 is performed after attaching the attachment body 10 to the bolt body 16.

[0061] When installing the partition ceiling 12 on the bolt body 16, while inserting the bolt body 16 through the bolt hole 12h, a force in the first direction X1 is applied to the partition ceiling 12 to move the partition ceiling 12 to the installation position P1 in the first direction X1. Specifically, first, at a position where the bolt hole 12h faces the bolt body 16 in the axial direction X, the partition ceiling 12 is supported by an operator. From that position, the operator pushes up the partition ceiling 12 in the first direction X1. As a result, the shaft portion 17 of the bolt body 16 is inserted into the bolt hole 12h of the partition ceiling 12.

[0062] As shown in FIGS. 2 and 10, even after the partition ceiling 12 is displaced to the position where the first partition screen 12a contacts the placement portion 31, the operator continues to push up the partition ceiling 12. At this time, with the placement portion 31 corresponding to the end portion of the attachment body 10 in the second direction X2 in contact with the partition ceiling 12, the partition ceiling 12 moves to the installation position P1. Thereby, the attachment body 10 is moved in the first direction X1 along the bolt body 16 and fixedly installed.

[0063] In the present embodiment, the attachment body 10 is fixedly installed in the first aspect. In the first aspect, while the attachment position of the attachment portion 24 to the bolt body 16 is displaced, the attachment body 10 moves in the first direction X1 along the bolt body 16. Specifically, from the position where the attachment body 10 is temporarily installed until it is fixedly installed, while the second end portions 24c of the plurality of elastic pieces 24a are engaged with the shaft portion 17, the shaft portion 17 is relatively displaced in the second direction X2 with respect to the main body 20. Along with this relative displacement of the shaft portion 17, deformation of the elastic piece 24a occurs such that the second end portion 24c is displaced in the second direction X2 starting from the first end portion 24b. Thereby, when the shaft portion 17 is inserted into the inside of the cylindrical portion 23, the relative displacement of the shaft portion 17 with respect to the main body 20 is not easily inhibited by the plurality of elastic pieces 24a. Thus, when a force in the first direction X1 is applied to the main body 20 in a state where the attachment body 10 is attached to the bolt body 16, the plurality of elastic pieces 24a allow the main body 20 to move along the bolt body 16 in the first direction X1, which is the direction of the force applied to the main body 20.

[0064] <Method for correcting positions of partition ceiling and attachment portion> The attachment body 10 may be installed at a position deviated from the original installation position P1 in the first direction X1. As a case where the attachment body 10 is installed at a position deviated from the installation position P1, for example, there is a case where an operator accidentally pushes up the partition ceiling 12 until the first partition screen 12a exceeds the installation position P1. In this case, the operator can shift the partition ceiling 12 to the installation position P1 in the second direction X2. However, since the attachment body 10 does not move with the displacement of the partition ceiling 12 in the second direction X2, the bolt hole 12h of the attachment body 10 and the partition ceiling 12 are separated. Since the attachment body 10 is located between the base ceiling 11 and the partition ceiling 12, it is difficult for the operator to directly touch the attachment body 10 and move the attachment body 10.

[0065] Referring to FIGS. 4 and 6, when the attachment body 10 is installed at a position deviated from the installation position P1 as described above, the operator inserts the tool 50 into the recess 33h of the second cylindrical portion 33 through the bolt hole 12h. This tool 50 is columnar. The operator inserts the tool 50 into the bolt hole 12h from a position facing the bolt hole 12h in the second direction X2 toward the first direction X1. The tool 50 is inserted into any of the mounting recesses 31g located in the mounting portion 31 through the bolt hole 12h. When the tool 50 is further inserted in the first direction X1 by the operator, the tool 50 is inserted into the recess 33h facing the mounting recess 31g into which the tool 50 is inserted in the axial direction X.

[0066] With the tool 50 inserted into the recess 33h, the operator rotates the tool 50 in the circumferential direction of the bolt body 16. The main body 20 is rotated in the circumferential direction of the bolt body 16 by the tool 50 inserted into the recess 33h. Specifically, the tool 50 inserted into the recess 33h is rotated in the circumferential direction of the bolt body 16 while abutting against the recess 33h. Thereby, a force in the circumferential direction of the bolt body 16 is applied from the tool 50 to the second cylindrical portion 33. Since the second main body portion 22 is integrated with the first main body portion 21, the entire main body 20 rotates in the circumferential direction of the bolt body 16 along with the force in the circumferential direction of the bolt body 16 applied to the second cylindrical portion 33. The attachment portion 24 rotates in the circumferential direction of the bolt body 16.

[0067] When the attachment portion 24 rotates in the circumferential direction of the bolt body 16, the attachment portion 24 screws along the thread groove 17a of the shaft portion 17. In the direction in which the attachment portion 24 screws into the thread groove 17a in the second direction X2, the operator rotates the tool 50. Thereby, while the attachment portion 24 engages with the bolt body 16, the main body 20 moves in the second direction X2. The operator continues to rotate the tool 50 until the placement portion 31 contacts the first partition surface 12a of the partition ceiling 12. Thereby, the attachment body 10 moves in the second direction X2 until the placement portion 31 contacts the first partition surface 12a of the partition ceiling 12.

[0068] <Function> Next, the function of the present embodiment will be described. The attachment body 10 is provided between the base ceiling 11 and the partition ceiling 12. A bolt body 16 is inserted into a bolt hole 12h formed in the partition ceiling 12. By attaching the attachment body 10 to the bolt body 16, the shielding body 40 is in a state of surrounding the bolt body 16. Therefore, the shielding body 40 can prevent the leakage of radiation from the bolt hole 12h.

[0069] <Effect> According to the above embodiment, the following effects can be obtained. (1-1) The attachment body 10 attached to the bolt body 16 includes a main body 20 and a shielding body 40. The main body 20 includes an attachment portion 24 that can be attached to the bolt body 16. The shielding body 40 surrounds the bolt body 16 so as to prevent the leakage of radiation from the bolt hole 12h formed in the partition ceiling 12. Therefore, by attaching the attachment body 10 to the bolt body 16, the shielding body 40 for preventing the leakage of radiation can be easily installed on the bolt body 16. Therefore, the leakage of radiation from the bolt hole 12h formed in the partition ceiling 12 can be easily prevented.

[0070] (1-2) The attachment body 10 may be attached to the bolt body 16 at a position deviated from the original position to be installed in the second direction X2. In this case, according to the above embodiment, when a force in the first direction X1 is applied to the main body 20 by the operator directly moving the main body 20 or pushing the main body 20 through the partition ceiling 12 during the installation of the partition ceiling 12, the attachment body 10 moves. Thereby, it is possible to move the attachment body 10 to the original position to be installed. Therefore, compared with the case where the attachment body 10 is fixed to the bolt body 16 by adhesion, welding, etc., the attachment body 10 attached to the bolt body 16 can be easily moved.

[0071] (1-3) The plurality of elastic pieces 24a form a communication hole 24h that communicates with the inside of the cylindrical portion 23. The plurality of elastic pieces 24a allow the shaft portion 17 of the bolt body 16 to enter from the communication hole 24h into the inside of the cylindrical portion 23. Therefore, the attachment of the attachment body 10 to the bolt body 16 can be performed by inserting the tip of the shaft portion 17 of the bolt body 16 from the communication hole 24h into the inside of the cylindrical portion 23. Therefore, compared with the case where the attachment body 10 is attached to the bolt body 16 using an attachment tool, the attachment of the attachment body 10 to the bolt body 16 can be easily performed.

[0072] (1-4) The cylindrical member 41 houses a part of the shaft portion 17. Therefore, by inserting the shaft portion 17 into the inside of the cylindrical member 41, the shaft portion 17 can be easily surrounded by the prevention body 40 around it.

[0073] (1-5) Since the displacement of the cylindrical member 41 in the radial direction of the bolt body 16 is suppressed by the first cylindrical portion 23a and the second cylindrical portion 33 as the polymerization cylindrical portions, the displacement of the cylindrical member 41 can be suppressed. Since the first cylindrical portion 23a overlaps the outer peripheral surface 41c of the cylindrical member 41, it is possible to prevent the operator from touching the cylindrical member 41 when the operator attaches the attachment body 10 to the bolt body 16. Thereby, the deformation of the cylindrical member 41 can be suppressed. Since the second cylindrical portion 33 overlaps the inner peripheral surface 41d of the cylindrical member 41, the second cylindrical portion 33 is interposed between the bolt body 16 and the cylindrical member 41. Therefore, the deformation of the cylindrical member 41 due to the rubbing of the bolt body 16 against the cylindrical member 41 can be suppressed.

[0074] (1-6) The edge member 42 is positioned around the bolt hole 12h of the partition ceiling 12. Therefore, by inserting the shaft portion 17 into the through hole 42h of the edge member 42, the periphery of the shaft portion 17 can be easily surrounded by the protector 40.

[0075] (1-7) Since the displacement of the edge member 42 in the axial direction X is suppressed by the first base portion 26 and the placement portion 31 as the overlapping surface portions, the displacement of the edge member 42 can be suppressed. The first base portion 26 overlaps the second surface 42b of the edge member 42, and the placement portion 31 overlaps the first surface 42a of the edge member 42. Therefore, it is possible to prevent an operator from touching the edge member 42 when the attaching body 10 is attached to the bolt body 16. Thereby, deformation of the edge member 42 can be suppressed. Since the placement portion 31 overlaps the first surface 42a of the edge member 42, the placement portion 31 is interposed between the partition ceiling 12 and the edge member 42. Therefore, deformation of the edge member 42 due to rubbing of the partition ceiling 12 against the edge member 42 can be suppressed.

[0076] (1-8) The protector 40 includes a radiation shielding material capable of shielding radiation. Specifically, the cylindrical member 41 and the edge member 42 are made of a radiation shielding material. Therefore, the periphery of the shaft portion 17 can be easily surrounded by the radiation shielding material.

[0077] (1-9) The cylindrical member 41 and the edge member 42 are separate from each other. That is, the cylindrical member 41 and the edge member 42 are manufactured from separate base materials. Therefore, it is possible to suppress a decrease in the function of shielding radiation in the cylindrical member 41 and the edge member 42, which would occur when the cylindrical member 41 and the edge member 42 are manufactured by bending from a single base material.

[0078] When installing the partition ceiling 12 in the (1-10) section, the attachment body 10 may be moved to a position shifted from the original installation position P1 in the first direction X1. According to the above embodiment, in such a case, by rotating the main body 20 in the circumferential direction of the bolt body 16 with a tool 50 inserted into the bolt hole 12h from below the partition ceiling 12, the attachment body 10 can be moved in the second direction X2. Therefore, the partition ceiling 12 can be moved to the original installation position P1 as the attachment body 10 moves.

[0079] <Modified Example> Note that the above embodiment can be implemented with the following modifications. The above embodiment and the following modified examples can be implemented in combination with each other within a technically non - conflicting range.

[0080] ○ The integration of the first main body part 21 and the second main body part 22 may be achieved by means other than the locking of the locking claw 27a to the locked part 32a. For example, the first main body part 21 and the second main body part 22 may be integrated by adhering the portions where they contact each other.

[0081] ○ At least one of the first cylindrical part 23a and the second cylindrical part 33 may be omitted from the main body 20. When the main body 20 does not include the first cylindrical part 23a, the main body 20 does not include a superposed cylindrical part that overlaps the outer peripheral surface 41c of the cylindrical member 41. When the main body 20 does not include the second cylindrical part 33, the main body 20 does not include a superposed cylindrical part that overlaps the inner peripheral surface 41d of the cylindrical member 41.

[0082] ○ At least one of the first base part 26 and the placement part 31 may be omitted from the main body 20. When the main body 20 does not include the first base part 26, the main body 20 does not include a superposed surface part that overlaps the second surface 42b of the along - member 42. When the main body 20 does not include the placement part 31, the main body 20 does not include a superposed surface part that overlaps the first surface 42a of the along - member 42.

[0083] ○ The first main body part 21 and the second main body part 22 may be integrally formed. The second main body part 22 may be omitted from the main body 20. ○ As shown in FIG. 11, the end portion of the attachment body 10 in the second direction X2 may be constituted by the prevention body 40. In this case, in the attachment body 10, for example, the second main body part 22 is omitted from the main body 20. The base part 25 is omitted from the first main body part 21. The main body 20 and the prevention body 40 are connected by a connecting part 51. The connecting part 51 is, for example, in the form of a flexible string. The end portion of the attachment body 10 in the second direction X2 is constituted by a following member 42. When the partition ceiling 12 is pressed against the attachment body 10 in a state where such an attachment body 10 is attached to the bolt body 16, a force in the first direction X1 is applied from the partition ceiling 12 to the following member 42. At this time, while the following member 42 is displaced in the first direction X1, the connecting part 51 bends along with the displacement of the following member 42. Such displacement of the following member 42 becomes a relative movement in the first direction X1 with respect to the main body 20. That is, the prevention body 40 is capable of relative movement with respect to the main body 20 in the first direction X1, which is the direction of the above-described force applied to the prevention body 40.

[0084] As shown in FIG. 12, with the following member 42 corresponding to the end portion of the attachment body 10 in the second direction X2 in contact with the partition ceiling 12, the partition ceiling 12 moves to the installation position P1. Thereby, the attachment body 10 is moved and fixedly installed in the first direction X1 along the bolt body 16. In this modified example, the attachment body 10 is fixedly installed in accordance with the second aspect. In the second aspect, without the attachment position of the attachment part 24 to the bolt body 16 being displaced, the prevention body 40 moves in the first direction X1 along the bolt body 16.

[0085] According to the above-described modified example, the following effects can be obtained. (2-1) The attachment body 10 may be attached to the bolt body 16 at a position deviated from the original position where it should be installed in the second direction X2. In this case, according to the above modification example, when a force in the first direction X1 is applied to the prevention body 40 by the operator directly moving the prevention body 40 or pushing the prevention body 40 through the partition ceiling 12 during the installation of the partition ceiling 12, the attachment body 10 moves. Thereby, it is possible to move the attachment body 10 to the original position where it should be installed. Therefore, compared with the case where the attachment body 10 is fixed to the bolt body 16 by adhesion, welding, etc., the attachment body 10 attached to the bolt body 16 can be easily moved. In this modification example, instead of moving the entire attachment body 10 with respect to the bolt body 16, the prevention body 40 is made movable with respect to the attachment portion 24. Thus, by moving a part of the attachment body 10 including the prevention body 40 with respect to the attachment portion 24, the prevention body 40 can be moved in contact with the partition ceiling 12 without changing the attachment position of the attachment portion 24 to the bolt body 16.

[0086] ○ In the above modification example, the shape of the attachment body 10 may be such that the cylindrical member 41 corresponds to the end portion of the attachment body 10 in the second direction X2. ○ In the above modification example, the main body 20 and the prevention body 40 may be integrated by means other than the connecting portion 51. In short, the main body 20 and the prevention body 40 may be integrated so that the prevention body 40 can move relative to the main body 20 in the first direction X1, which is the direction of the above-mentioned force applied to the along member 42. For example, the cylindrical portion 23 and the cylindrical member 41 may be integrated so that the cylindrical member 41 is slidable with respect to the cylindrical portion 23. In this case, the outer peripheral surface 41c of the cylindrical member 41 may be slidable on the inner surface of the cylindrical member 41, or the inner peripheral surface 41d may be slidable on the outer surface of the cylindrical member 41.

[0087] ○ At least one of the first main body portion 21 and the second main body portion 22 may be made of a material other than polyethylene. In this case, as the material of the first main body portion 21 and the second main body portion 22, a material that does not cause any problem even if the operator touches it with bare hands is more preferable.

[0088] ○ In the second cylindrical portion 33 of the main body 20, the formation of the concave portion 33h may be omitted. The formation of the mounting concave portion 31g on the mounting portion 31 may be omitted. ○ The diameter of the hole portion 31h in the mounting portion 31 may be equal to or larger than the diameter of the bolt hole 12h in the partition ceiling 12.

[0089] ○ The diameter of the through hole 42h in the edge member 42 may be equal to or larger than the diameter of the bolt hole 12h in the partition ceiling 12. ○ The cylindrical member 41 is not limited to being formed by winding the belt-like body 41e into a cylindrical shape.

[0090] ○ The edge member 42 is not limited to a plate shape. For example, the edge member 42 may be block-shaped. ○ The cylindrical member 41 and the edge member 42 may be made of a radiation shielding material other than lead. The cylindrical member 41 and the edge member 42 may be made of different radiation shielding materials.

[0091] ○ One of the cylindrical member 41 and the edge member 42 may be omitted from the protector 40. The protector 40 may be one that does not include either the cylindrical member 41 or the edge member 42. In this case, the protector 40 only needs to surround the bolt body 16 so as to prevent leakage of the object to be leaked from the bolt hole 12h.

[0092] ○ The elastic piece 24a may be curved such that the portion closer to the second end portion 24c from the first end portion 24b is located in the first direction X1. The elastic piece 24a may be a flat plate shape that does not curve between the first end portion 24b and the second end portion 24c.

[0093] ○ The elastic piece 24a may be such that the dimension in the circumferential direction of the bolt body 16 increases as it approaches the second end portion 24c from the first end portion 24b. The dimensions of the plurality of elastic pieces 24a in the circumferential direction of the bolt body 16 may be uniform between the first end portion 24b and the second end portion 24c.

[0094] ○ The attachment portion 24 is not limited to the case where the second end portion 24c of the elastic piece 24a enters and engages with the screw groove 17a. For example, the attachment portion 24 may be configured to maintain the attachment position to the bolt body 16 by pressing against the outer surface of the bolt body 16 and generating friction therebetween. In this case, the attachment portion 24 may be a frictional engagement that is movable while being in sliding contact with the bolt body 16 when pressed.

[0095] ○ The engaging means of the attachment portion 24 to the shaft portion 17 is not limited to screwing into the screw groove 17a. The attachment portion 24 may engage, for example, with a portion of the shaft portion 17 where the screw groove 17a is not formed. In this case, the bolt body 16 may not have the screw groove 17a in the shaft portion 17.

[0096] ○ The attachment portion 24 is not limited to a plurality of elastic pieces 24a. For example, the attachment portion 24 may be a nut attachable to the shaft portion 17 of the bolt body 16. ○ The preventing body 40 may be configured to prevent leakage from the bolt hole 12h of a leakage target other than radiation. In this case, examples of the leakage target include electromagnetic waves, sound, and heat.

[0097] ○ The partitioning body may be a partition wall or a partition floor.

Description of Reference Numerals

[0098] P1... Installation position, X... Axis direction, X1... First direction, X2... Second direction, 10... Attachment body, 11... Foundation ceiling, 12... Partition ceiling, 12h... Bolt hole, 16... Bolt body, 17... Shaft portion, 17a... Screw groove, 20... Main body, 23... Cylindrical portion, 23a... First cylindrical portion, 24... Attachment portion, 24a... Elastic piece, 24h... Communication hole, 33... Second cylindrical portion, 33h... Concave portion, 40... Preventing body, 41... Cylindrical member, 41c... Outer peripheral surface, 41d... Inner peripheral surface, 41e... Band-shaped body, 41h... Open end, 42... Along member, 42a... First surface, 42b... Second surface, 42h... Through hole, 50... Tool.

Claims

1. An attachment body provided between a base member and a partition body provided at a distance from the base member, and attached to a bolt body inserted through a bolt hole formed in the partition body, the attachment body comprising: a main body and a prevention body integrated with each other; the main body includes an attachment portion capable of being attached to the bolt body by engaging with the shaft portion of the bolt body; the prevention body extends in the axial direction of the bolt body along a part of the shaft portion; the prevention body surrounds the bolt body so as to accommodate the part of the shaft portion to prevent leakage of a leakage target from the bolt hole.

2. An attachment body provided between a base member and a partition body provided at a distance from the base member, and attached to a bolt body inserted through a bolt hole formed in the partition body, the attachment body comprising: a main body and a prevention body integrated with each other; the main body includes an attachment portion capable of being attached to the bolt body by engaging with the shaft portion of the bolt body; the prevention body has a cylindrical member that accommodates a part of the shaft portion and extends in the axial direction of the bolt body, and the bolt body is inserted through an open end of the cylindrical member; the prevention body surrounds the bolt body so as to prevent leakage of a leakage target from the bolt hole.

3. The attachment body according to claim 2, wherein the main body includes a cylindrical overlapping cylinder portion that overlaps at least one of an outer peripheral surface and an inner peripheral surface of the cylindrical member.

4. The attachment body according to any one of claims 1 to 3, wherein when a force in a direction from the partition body toward the base member in the axial direction of the bolt body is applied to the main body in a state where the attachment portion is attached to the bolt body, the attachment body allows the main body to move along the bolt body in the direction of the force applied to the main body.

5. The main body includes a cylindrical portion surrounding the bolt body; the attachment portion is composed of a plurality of elastic pieces that extend from the cylindrical portion toward the bolt body and are positioned to surround the bolt body to form a communication hole communicating with the inside of the cylindrical portion; the plurality of elastic pieces engage with the shaft portion so as to allow the shaft portion to enter the inside of the cylindrical portion from the communication hole and restrict the shaft portion from exiting the cylindrical portion from the communication hole.

6. The attachment body according to any one of claims 1 to 5, wherein when a force in a direction from the partition body toward the base member in the axial direction of the bolt body is applied to the prevention body with the attachment portion attached to the bolt body, relative movement with respect to the main body is possible in the direction of the force applied to the prevention body.

7. The prevention body has a member along which one surface is located along the partition body. The attachment body according to any one of claims 1 to 6, wherein the bolt body is inserted into a through hole that faces the bolt hole in the axial direction of the bolt body and penetrates the member along in the axial direction of the bolt body.

8. The member along has a first surface that is one surface in the axial direction of the bolt body and a second surface that is located opposite to the first surface in the axial direction of the bolt body. The first surface is located along the partition body. The attachment body according to claim 7, wherein the main body includes a overlapping portion that overlaps at least one of the first surface and the second surface.

9. The attachment body according to any one of claims 1 to 8, wherein the prevention body includes a radiation shielding material capable of shielding radiation.

10. The prevention body has a cylindrical member that houses a part of the shaft portion and extends in the axial direction of the bolt body, and a plate-shaped member along. The member along has a first surface that is one surface in the axial direction of the bolt body and a second surface that is located opposite to the first surface in the axial direction of the bolt body. The first surface is located along the partition body. The cylindrical member and the member along are separate from each other and are made of a radiation shielding material capable of shielding radiation. The bolt body is inserted into an opening end of the cylindrical member and a through hole that faces the bolt hole in the axial direction of the bolt body and penetrates the member along in the axial direction of the bolt body. The attachment body according to any one of claims 1 to 9, wherein the cylindrical member is formed by winding a belt-like body into a cylindrical shape and is in contact with the second surface.

11. The attachment portion can be engaged with the shaft portion by being screwed into a screw groove of the shaft portion. The main body includes a recess that faces the bolt hole in the axial direction of the bolt body. The attachment body according to any one of claims 1 to 10, wherein the main body is rotated in the circumferential direction of the bolt body by a tool inserted into the recess through the bolt hole, and the main body moves in the axial direction of the bolt body in a direction from the base member toward the partition body.

12. An installation method of an attachment body provided between a base member and a partition body installed at an interval from the base member and attached to a bolt body inserted through a bolt hole formed in the partition body, The attachment body includes a main body and a prevention body integrated with each other. The main body includes an attachment portion that can be attached to the bolt body by engaging with the shaft portion of the bolt body. The prevention body surrounds the bolt body so as to prevent leakage of a leakage target from the bolt hole. In the axial direction of the bolt body, the direction from the partition body toward the base member is referred to as the first direction, and the direction from the base member toward the partition body is referred to as the second direction. Before installing the partition body, the attachment body is temporarily installed on the bolt body such that an end portion of the attachment body in the second direction is displaced in the second direction from an installation position of the partition body in the axial direction of the bolt body. When installing the partition body, while inserting the bolt body into the bolt hole, a force in the first direction is applied to the partition body, so that the partition body is moved in the first direction to the installation position. The attachment body is permanently installed in the first mode or the second mode by moving the partition body to the installation position while the end portion of the attachment body in the second direction is in contact with the partition body. In the first mode, the attachment body moves in the first direction along the bolt body while the attachment position of the attachment portion on the bolt body is displaced. In the second mode, the attachment position of the attachment portion on the bolt body does not change, and the prevention body moves in the first direction along the bolt body. An installation method of an attachment body is characterized by this.

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