JPH10284872A - Electromagnetic shielding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic shielding structure which can be installed in a restricted small space and has a high degree of freedom in designing and has a small number of components and has a simple structure but can show a high electromagnetic shielding performance. SOLUTION: In this electromagnetic shielding structure, a metal plate 5 for electromagnetic shielding is installed through a shielding plate supporting member 4 located at a specified distance from a roof ceiling 1 so that the interior of a room may be surrounded by the metal plate 5 for electromagnetic shielding. The trim material such as a ceiling truss 9 located away from the roof ceiling 1 and a wall face of the house is secured inside the house through a suspection bolt 3, 7 which passes through the shielding plate supporting member 4. In the shielding plate supporting member 4 which also forms a junction of the metal plate 5 for electromagnetic shielding, relative short side sections 4B of a C-shaped cross section are formed so as to cross at nearly right angles with the roof ceiling 1 and the wall face of the house.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting an electromagnetic wave shielding metal plate via a shield plate receiving member disposed at a predetermined interval inside a building, and surrounding the room with the electromagnetic wave shielding metal plate. The present invention relates to an electromagnetic wave shielding structure of a formed electromagnetic wave shielding room.

[0002]

2. Description of the Related Art In general, in an electronic control or an electromagnetic wave generation experiment formed in a building, an electromagnetic shielding room or an anechoic chamber is used so as not to be affected by electromagnetic waves from outside.
Walls, floors, ceilings, etc. are made of highly conductive metal sheets for electromagnetic shielding so that electromagnetic waves do not leak outside. It is devised to be kept. However, even if the wall or the like is formed of an electromagnetic wave shielding metal plate having excellent electrical conductivity, the electromagnetic wave shielding room is formed, the electromagnetic wave shielding room attached to a shield plate receiving member arranged at a predetermined interval inside the building. In order to support and fix a metal plate and an interior material such as a ceiling group disposed at a predetermined interval inside the building in a building, a support fixture such as a suspension bolt in addition to various power lines and signal lines is provided on the shield plate support. It is necessary to install through the member. Among them, for the power line and the signal line, a noise filter can be installed in a cable to prevent the generation of leakage electromagnetic waves, but for the support fixtures such as the suspension bolts, the electromagnetic wave is transmitted through the electromagnetic shielding metal plate and the support fixture. May intrude or leak. So, usually,
A support fixture such as a suspension bolt of this type was attached to an electromagnetic wave shielding room or the like by a method as shown in FIG.

In the prior art shown in FIG. 9A, an upper end of a lower suspension bolt 37 is connected to a connection fitting 36 screwed to a lower end of an upper suspension bolt 33 by an insert 32 embedded in a building ceiling 31. While the parts are screwed and connected, an electromagnetic wave shielding metal plate (steel foil or the like) 35 attached to a base board 40 or the like is supported and fixed to a hanger 38A fixed to the connection fitting 36. A hook 42 at the upper end of a ceiling suspension bolt 43 is engaged with a lower end of a lower suspension bolt 37 suspended through the electromagnetic wave shielding metal plate 35 via a suspension metal fitting 41. The lower end of the ceiling suspension bolt 43 is attached to a ceiling assembly 39 by a hanger 38B.
And other interior materials. Reference numeral 44 denotes a ceiling interior material suspended inside (below) the ceiling set 39 by the suspension fitting 46. Reference numeral 45 denotes a deck plate constituting the building ceiling 31.

In the conventional example shown in FIG. 9B, a flange of a C-shaped member 34 is supported and fixed to a lower end of an upper suspension bolt 33 by an insert 32 buried in a ceiling 31 of a building. . In other words, the C-shaped member 34 is set up vertically, and the lower suspension bolt 37 is fixed by a nut or the like via a finishing material 40 such as a gypsum board in which an electromagnetic wave shielding metal plate 35 is adhered to the lower surface of the lower flange portion. You. At the lower end of the lower suspension bolt 37, a finishing material such as a ceiling set (not shown) is stretched via a hanger 38.

[0005]

However, a metal plate for electromagnetic wave shielding attached to a shield receiving member arranged at a predetermined interval inside such a conventional building, and a ceiling assembly spaced at a predetermined interval inside the metal plate for electromagnetic wave shielding. Interior materials such as are arranged,
In the example of FIG. 9 (A), in the example of FIG. 9 (A), a large number of connection fittings 36 and hangers 38A are provided in the electromagnetic wave shielding structure of the electromagnetic wave shielding room which is formed so as to surround the room by the metal plate for electromagnetic wave shielding. In the example shown in FIG. 9 (B), installation of the C-shaped members arranged in the upright position, etc., and the presence of the deck plate 45 and the like constituting the ceiling of the building or the floor of the upper floor, etc. cause the building ceiling 31 and electromagnetic waves There is no room in the narrow space between the shield metal plate 35 and the design restrictions are tight. Further, a lower suspension bolt 37 penetrates the electromagnetic wave shielding metal plate 35 in order to support and fix the electromagnetic wave shielding metal plate 35. Generally, a bolt or the like is attached to the electromagnetic wave shielding metal plate 35. When the lower suspension bolt 37 is attached to the lower suspension bolt 37, the electromagnetic wave leaks or penetrates through a minute gap formed between the bolt and the mounting hole of the electromagnetic wave shielding metal plate 35. And the electromagnetic wave shielding metal plate are shielded by an electromagnetic wave shielding material 47 such as a braided material, so that the electromagnetic wave shielding metal plate 35 and the lower suspension bolt 37 in the lower suspension bolt 37 mounting portion are shielded without gaps. In addition, they are shielded by being electrically connected to the room so that the room is kept in a good electromagnetic wave shielding state. In this way, it is necessary to fix the finishing material 40 to which the electromagnetic wave shielding metal plate 35 is adhered to the lower suspension bolt 37 via an electromagnetic wave shielding material at a factory or at a construction site in advance. In many cases, if it is necessary to replace the suspension bolts 37 or the like due to renovation of the electromagnetic wave shielding room or the like after the construction, the hanging bolts 37 or the like must be removed from the connection fittings mounted above the metal plate 35 for electromagnetic wave shielding. The dismantling work was extremely troublesome.

Therefore, the present invention solves various problems in the conventional electromagnetic wave shielding structure of the electromagnetic wave shielding room,
It is an object of the present invention to provide an electromagnetic shielding structure that can be installed in a restricted narrow space, has a large degree of freedom in design, has a simple structure with a small number of parts, and exhibits high electromagnetic shielding performance.

[0007]

According to the present invention, an electromagnetic wave shielding metal plate is attached to a building via a shield plate receiving member arranged at a predetermined interval inside a building, and the room is mounted by the electromagnetic wave shielding metal plate. In the electromagnetic wave shielding structure of the electromagnetic wave shielding room formed so as to surround the inside, an interior material such as a ceiling set disposed apart from the ceiling surface and the wall surface of the building in the electromagnetic wave shielding room includes a suspension bolt penetrating the shield plate receiving member. In addition to being supported and fixed in the building through the intermediary, the shield plate receiving member also constitutes a joint portion of the electromagnetic wave shielding metal plate, and the shield plate receiving member has relatively short sides having a C-shaped cross section and both sides are substantially the same as the ceiling surface and wall surface of the building It is characterized by being arranged orthogonally. Further, according to the present invention, the flat plate portion of the C-shaped material used for the shield plate receiving member constitutes a support fixing portion to the suspension bolt, and the turned-back portions at both ends of the C-shaped material are edges of the metal plate for electromagnetic wave shielding. And an electromagnetic wave shielding material is interposed between the support fixing portion and the joint portion. Further, according to the present invention, the flat plate portion of the C-shaped member used for the shield plate receiving member constitutes a support fixing portion to the suspension bolt and a joint portion of an edge portion of the electromagnetic wave shielding metal plate, and supports and fixes these portions. An electromagnetic wave shielding material is interposed between the portion and the joint. Further, the present invention also provides an interior of the building such as the ceiling set in a building by mounting a slide hardware between the return portions at both ends of the C-shaped member used for the shield plate receiving member and supporting and fixing a suspension bolt to the slide hardware. The material or the position of the electromagnetic wave shielding metal plate is configured to be adjustable. Further, in the present invention, a lower suspension bolt for suspending an interior material such as the ceiling assembly may be provided at a lower portion on a suspension bolt supported and fixed to a C-shaped material used for the shield plate receiving member and positioned inside the electromagnetic shield room. It is characterized by screwing the upper part of the screwed connection hardware,
These are the means for solving the problem.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, and FIG. 1 (A) is a longitudinal sectional view on a plane including hanging bolts.
1B is an enlarged view of a portion A in FIG. 1A, and FIG. 1C is an enlarged view of a portion B in FIG. 1A. As shown in FIG. 1A, in a building such as a building ceiling 1, an electromagnetic wave shielding room is formed by being surrounded by an electromagnetic wave shielding metal plate 5 made of a galvanized steel sheet or the like. A deck plate 15 constituting the ceiling of the building and the floor of the upper floor is incorporated between the wall surface of the building such as the building ceiling 1 and the metal plate 5 for electromagnetic wave shielding. Further, the electromagnetic shielding metal plate 5
The ceiling assembly 9 is suspended at a predetermined interval by a lower suspension bolt 7 and a hanger 8 inside (in the lower part of the drawing), and an interior material such as a ceiling finishing material 10 is disposed below the ceiling assembly 9 by a suspension bracket 16. . In the present invention, the C-shaped member 4 is basically used for supporting and fixing the interior materials such as the electromagnetic wave shielding metal plate 5 and the ceiling assembly 9 in the building via the suspension bolts. The shape member 4 constitutes a joining material of the electromagnetic wave shielding portion by the electromagnetic wave shielding members 12 and 11 to the bolt holes or the like of the hanging bolt or the metal plate 5 for electromagnetic wave shielding, and the relatively short side portions 4B of the C-shaped member 4 are formed. It is characterized by being arranged substantially perpendicular to the wall surface of the building such as the building ceiling 1 or the like.

More specifically, as shown in an enlarged view in FIG. 1B, the upper suspension bolt 3 is mounted near the lower end of the upper suspension bolt 3 in which the insert 2 at the upper end is embedded in the ceiling 1 of the building. A C-shaped member 4 made of a steel material having a C-shaped cross section is inserted into a bolt hole 4D of a flat plate portion 4A of the C-shaped member 4, and the flat plate portion 4A is connected to an upper fixing nut 13 screwed to the upper suspension bolt 3 and a lower long nut. It is clamped and fixed by the metal fitting 6. At this time, copper or the like for shielding electromagnetic waves between the upper suspension bolt 3 and the bolt hole 4D of the flat plate portion 4A is provided between the flat plate portion 4A of the C-shaped member 4 and the flange portion 6A at the upper end of the connection fitting 6. The electromagnetic wave shielding member 12 made of a braided material is disposed so as to be tightly and electrically connected. Said C
The flat plate portion 4A of the mold member 4 is relatively long, and both side portions 4B orthogonal to the flat plate portion 4B are formed relatively short, and both end portions thereof are bent to form a return portion 4C substantially parallel to the flat plate portion 4A. Have been. As shown in FIG. 1 (C), the return portions 4C at both ends of the C-shaped member 4 which are substantially parallel to the flat plate portion 4A.
Along, the edges of the electromagnetic wave shielding metal plate 5 are overlapped and joined to form a joint. This joint is formed by joining the edge of the electromagnetic wave shielding metal plate 5 to the return portion 4C of the C-shaped member 4 by joining screws 14.
An electromagnetic wave shielding material 11 for electromagnetically shielding the screw holes 4E of the mold member 4 and the screw holes of the electromagnetic wave shielding metal plate 5 is disposed so as to be tightly and electrically connected. Note that a tapping screw is preferably used as the joining screw 14 in the present embodiment. Further, as shown in FIG. 2B, the pitch P of the joining screws 14 is preferably about 100 mm from the viewpoint of an electromagnetic wave shielding effect. According to the experiment, a shielding ratio of 65 dB or more was measured.

As shown in FIG. 2 which will be described later in an enlarged manner, the connection fitting 6 composed of the long nut has a female screw portion 6B formed therein, and a screw at the lower end of the upper suspension bolt 3. Part is screwed in and the lower suspension bolt 7
Is screwed in. A hanger 8 is inserted and fixed to a lower end portion of the lower suspension bolt 7, and the ceiling set 9 is suspended. A ceiling finishing material 10 such as a gypsum board or a decorative material is provided inside the ceiling assembly 9 via a suspension fitting 16. Hanged.

With the above construction, the electromagnetic wave shielding metal plate 5 and the interior material such as the ceiling assembly 9 are arranged to be supported and fixed in the building such as the building ceiling 1 via the suspension bolts 3 and 7. The C-shaped member 4 is an electromagnetic wave shielding part (part A in FIG. 1A) by the electromagnetic wave shielding material 12 in the penetrating part of the suspension bolt 3 or a metal plate 5 for electromagnetic wave shielding.
Since the joining material of the electromagnetic wave shielding part (part B in FIG. 1A) by the electromagnetic wave shielding material 11 in FIG. 1 is formed, that is, the supporting and fixing of the suspension bolt 3 penetrating the C-shaped material 4 and the electromagnetic wave by the return part 4C of the C-shaped material 4 The joint with the edge of the electromagnetic wave shielding metal plate 5 as a shield joining material can be effectively used, and by also using such parts, the space between the ceiling surface or wall surface of the building and the electromagnetic wave shielding metal plate 5 can be obtained. Even if there is not enough room, the number of parts improves the degree of freedom in space design. In particular, in the electromagnetic wave shielding portion formed by the electromagnetic wave shielding material 12 between the flat plate portion 4A of the C-shaped member 4 and the suspension bolt 3, the weight of the finishing material such as a ceiling assembly effectively sandwiches the electromagnetic wave shielding material 12 and provides a sufficient electromagnetic wave shielding action. It can be performed. Moreover, by disposing the relatively short side portions 4B of the C-shaped member substantially orthogonal to the ceiling surface and the wall surface of the building, the electromagnetic wave shielding metal plate 5 and the ceiling surface and the wall surface of the building such as the building ceiling 1 are formed. Can be made smaller, and the electromagnetic shielding room can be made wider. Also, a connection metal fitting 6 in which a lower suspension bolt 7 for suspending an interior material such as the ceiling assembly 9 is screwed to a suspension bolt supported by and fixed to the C-shaped member 4 and positioned inside the electromagnetic shield room. Since the upper part is screwed, that is, since the connecting hardware 6 is located inside the electromagnetic shield chamber, the electromagnetic wave leaks through a minute gap in the screwing portion between the connecting hardware 6 and the lower suspension bolt 7. The maintenance and management after construction, such as adjustment and repair of the position of ceiling finishing materials such as the ceiling assembly 9 with respect to the building 1 and the electromagnetic shielding metal plate 5 can be performed from the inside of the electromagnetic shielding room. In this respect, the degree of freedom in design is improved.

FIG. 2 is an enlarged view of FIG.
2A is a cross-sectional view of a main part, and FIG. 2B is a plan view of FIG. As shown in FIG. 2 (A), the edge of the electromagnetic wave shielding metal plate 5 is overlapped and joined along the return portions 4C at both ends of the C-shaped member 4 substantially parallel to the flat plate portion 4A. At the time of the construction, the edge of the electromagnetic wave shielding metal plate 5 is joined to the return portion 4C of the C-shaped member 4 by a joining screw 14 such as a tapping screw, and the screw hole 4E of the C-shaped member 4 and the electromagnetic wave are formed. Metal plate for shielding 5
The electromagnetic wave shielding material 11 for electromagnetically shielding the bolt hole in the above is closely arranged. FIG.
As shown in FIG. 3B, both ends of the C-shaped member 4 are turned along the respective edges of the electromagnetic wave shielding metal plate 5.
The electromagnetic wave shielding members 11, 11 made of a band-shaped braided material are disposed between C and 4C so as to be tightly and electrically connected. A tapping screw is preferably used as the joining screw 14 for joining the return portion 4C of the C-shaped member 4, the electromagnetic wave shielding material 11 and the electromagnetic wave shielding metal plate 5,
The pitch P of the plurality of joining screws 14 is preferably about 100 mm from the viewpoint of the electromagnetic shielding effect.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the return portions 4 at both ends which are substantially parallel to the flat plate portion 4A of the C-shaped member 4 in the first embodiment.
When the edge portions of the electromagnetic wave shielding metal plate 5 are overlapped and joined along C to form a joined portion, as shown in a partially enlarged manner, the return portion 4C of the C-shaped member 4 and the electromagnetic wave shielding The edge portion of the metal plate 5 is joined by spot welding indicated by reference numeral 19. In the case where the return portion 4C of the C-shaped member 4 and the edge portion of the electromagnetic wave shielding metal plate 5 are joined by spot welding as in the present embodiment,
The electromagnetic wave shielding material 1 as in the above-described embodiments.
Even if 1 is not provided, a sufficient electromagnetic wave shielding effect can be obtained. In the present embodiment, a pair of L-shaped outer plates 18A are further provided between the return portions 4C and 4C at both ends of the C-shaped member 4 so as to hold the return portions 4C and 4C at both ends.
A slide metal member 18 formed by superimposing the inner plate 18B is mounted, and the lower hanging bolt 7 is supported and fixed to the slide metal member 18. With this configuration, according to the present embodiment, in addition to the effects of the above-described embodiments, in addition to the effects of the above-described embodiments, the ceiling set 9 and the like in the building such as the building ceiling 1 and the like in the electromagnetically shielded room are provided. The position of the finishing material or the metal plate 5 for electromagnetic wave shielding is not disturbed by any leakage of the electromagnetic wave, and not only the dimensional deviation based on the design error at the time of construction, but also the position of each position freely after the construction. Adjustments can be made.

FIG. 4 shows an example of a working mode during construction according to the present invention. According to the above-described embodiment, an electromagnetic shielding metal plate 5 is supported on a building ceiling 1 or the like via a C-shaped member 4 by an upper hanging bolt 3. After fixing, a plurality of lower bolts 7 suspended from the C-shaped member 4 are used, and the equipment stand is bridged between the plurality of lower bolts 7 and 7 via an appropriate hanger or the like. is there. Electric wires, pipes, and the like are placed on these equipment bases.

FIGS. 5 and 6 show a third embodiment of the present invention. FIG. 5 (A) is a plan view, and FIG. 5 (B) is a view seen from an arrow E in FIG. 5 (B). It is an arrow D view of (A). FIG.
FIG. 6 is a sectional view showing a state where the fixing nut and the joining screw in FIG. 5B are tightened. In this embodiment, unlike the above-described embodiments, the flat plate portion 4A of the C-shaped member 4 constitutes a support fixing portion for a suspension bolt (upper suspension bolt 3), and a metal plate for electromagnetic wave shielding. 5 constitutes a joint portion of the edge portion. That is, FIG.
As is apparent from the above description, the return portions 4C at both ends substantially parallel to the flat plate portion 4A are located on the building side, that is, above. Electromagnetic wave shielding metal plate 5 bonded to flat plate portion 4A of C-shaped member 4
As shown in the plan view of FIG. 5 (A), assuming that the left side of the drawing is 5A and the right side of the drawing is 5B, these electromagnetic shielding metal plates 5A, 5B Are provided with trapezoidal notches 5C and 5D at the respective edges of the upper suspension bolt 3
It is installed as if to avoid. An upper electromagnetic wave shielding material 12A is provided between the flat plate portion 4A of the C-shaped member 4 and the electromagnetic wave shielding metal plate 5A, and a lower electromagnetic wave shielding material 12B is provided between the electromagnetic wave shielding metal plate 5A and the electromagnetic wave shielding metal plate 5B. Metal plate 5 for electromagnetic wave shielding
A patch plate 20 is attached to the inside (below) of B and tightened by a lower fixing nut 13. Reference numeral 6 denotes a connecting hardware, and reference numeral 7 denotes a lower suspension bolt. Reference numeral 14C denotes a joining screw for joining the overlapping edge portions of the electromagnetic wave shielding metal plates 5A and 5B in the length direction. FIG. 6 shows a state in which the electromagnetic wave shielding material 12B bites into the trapezoidal cutouts 5C and 5D in the electromagnetic wave shielding metal plates 5A and 5B due to the tightening of the fixing nut 13 and the joining screw 14B. The electromagnetic wave shielding function can be achieved in the vicinity of the suspension bolt 3 which is fastened and fixed. With this configuration, in the present embodiment, the flat plate portion 4A of the C-shaped member 4 is a support fixing member for the electromagnetic wave shielding metal plate 5 in the building and an electromagnetic wave shielding joining member between the electromagnetic wave shielding metal plates 5A and 5B. , And high electromagnetic wave shielding performance can be exhibited while having a simpler configuration.

FIG. 7 shows a fourth embodiment of the present invention. This embodiment is different from the third embodiment in that an opening is located at the upper part (outside the electromagnetic wave shield room). 3 between the return portions 4C, 4C at both ends of the mold member 4.
As in the third embodiment, a slide metal member 21 formed by superimposing a pair of outer plates 21A and an L-shaped inner plate 21B is attached at both ends so as to hold these return portions 4C and 4C. The lower end of the upper suspension bolt 3 is supported and fixed to the slide hardware 21. With this configuration, according to the present embodiment, in addition to the effects of the third embodiment, in addition to the effects of the third embodiment, the ceiling set 9 for the building such as the building ceiling 1 outside the electromagnetically shielded room is provided.
The position of the finishing material and the electromagnetic wave shielding metal plate 5 is not adjusted to the leakage of the electromagnetic wave, so that not only the adjustment of the dimensional deviation and the like based on the design error at the time of construction but also the electromagnetic wave shielding can be freely performed after the construction. The position of the entire room can also be adjusted.

FIG. 8 is a sectional view of a principal part showing a fifth embodiment of the electromagnetic wave shielding structure of the present invention applied to a wall surface of a building. FIG. 8A shows the side wall surface 1A of the building.
The bolt hole of the flat plate portion 4A of the C-shaped member 4 used for the shield plate receiving member made of steel or the like having a C-shaped cross section is inserted into the side wall suspension bolt 3A having the right end insert portion 2A embedded therein, and the flat plate portion 4A is inserted. It is pinched and fixed by a fixing nut 13A screwed to the side wall suspension bolt 3A. Between the flat plate portion 4A of the C-shaped member 4 and the fixing nut 13A, an electromagnetic wave shielding material 1 made of a braided material such as copper for electromagnetic wave shielding between the side wall suspension bolt 3A and the bolt hole of the flat plate portion 4A.
2A are arranged so as to be tightly and electrically connected. The flat plate portion 4A of the C-shaped member 4 is relatively long, and both side portions 4B orthogonal to the flat plate portion 4B are formed relatively short, and both end portions thereof are bent to be turned portions substantially parallel to the flat plate portion 4A. 4C. The edges of the metal plate 5 for electromagnetic wave shielding are overlapped and joined along the return portions 4C at both ends of the C-shaped member 4 which are substantially parallel to the flat plate portion 4A to form a joined portion. The joints are tightly and electrically joined by joining screws or spot welding. At the left end of the side wall suspension bolt 3A, an interior material such as a wall 9A or a wall finishing material attached to the surface thereof is fixed by a fixing nut 8A. FIG. 8B shows an example in which the flat plate portion 4A of the C-shaped member 4 used for the shield plate receiving member is set to be somewhat away from the side wall surface 1A of the building. Thus, an effective electromagnetic wave shielding structure of the electromagnetic wave shielding room can be obtained on the side wall surface of the building as in the above-described embodiment.

The embodiments of the present invention have been described above. However, within the scope of the present invention, the shape and material of the C-shaped material used for the shield plate receiving member, the metal plate for electromagnetic wave shielding, and the electromagnetic wave shielding material Shape, material, shape of upper suspension bolts, lower suspension bolts and connecting brackets and their combination-related configuration, joining form and related configuration between C-shaped material and electromagnetic shielding metal plate and electromagnetic shielding material, upper suspension bolt and building, The respective configurations of the lower suspension bolt, the ceiling assembly, and the ceiling finishing material, the pitch of the joining screws, the configuration of the slide hardware, and the like can be appropriately adopted. Further, in each of the above-described embodiments, an example is described in which a finishing material such as a metal plate for electromagnetic wave shielding or a ceiling assembly is hung on the ceiling of a building. It is needless to say that a case may be included where it is installed on the side wall and the floor surface portion in the same manner as in the above-described embodiments.

[0019]

As described above in detail, according to the present invention, in order to support and fix a finishing material such as a metal plate for electromagnetic wave shielding and a ceiling set to a building such as a building ceiling via suspension bolts. Since the C-shaped material to be arranged constitutes a joining material of the electromagnetic wave shielding part by the electromagnetic wave shielding material and the electromagnetic wave shielding part of the electromagnetic wave shielding material by the electromagnetic wave shielding material with the hanging bolt, the supporting and fixing of the electromagnetic wave shielding metal plate is performed. The bonding with the edge of the electromagnetic wave shielding metal plate as the electromagnetic wave shielding bonding material can be effectively used also including the electrical bonding. In addition, since the relatively short sides of the C-shaped member are disposed substantially perpendicular to the wall surface of the building, the distance between the wall surface of the building such as the ceiling of the building and the metal plate for electromagnetic wave shielding is reduced. It is possible to make the electromagnetic wave shielding room wider. In this way, despite having a simple structure with a small number of parts, there is not enough room between the wall surface of the building such as the ceiling of the building and the metal plate for electromagnetic wave shielding, and high electromagnetic wave shielding performance can be exhibited in a restricted narrow space. Therefore, an electromagnetic wave shielding structure of an electromagnetic wave shielding room formed in a building, which has a higher degree of freedom in space design, is provided.

An upper part of a connection hardware in which a lower suspension bolt for suspending a finishing material such as the ceiling assembly is screwed to a suspension bolt supported on and fixed to the C-shaped member and positioned inside the electromagnetic shield room. When screwed together,
Adjustment and repair of ceiling finishing materials such as ceiling assembly with respect to the building and the metal plate for electromagnetic wave shielding, etc., because it is not necessary to be careless about leakage of electromagnetic waves through the minute gap in the threaded part between the connection hardware and the lower suspension bolt. Can be performed from the inside of the electromagnetic wave shield room, so that the degree of freedom of design is improved from the point of maintenance and management after construction, and the electromagnetic wave shield part with the electromagnetic wave shield material of the flat part of C type material and the suspension bolt etc. The weight of the finishing material and the like effectively sandwiches the electromagnetic wave shielding material, so that a sufficient electromagnetic wave shielding action can be performed. Further, in the case where the slide hardware is mounted between the return portions at both ends of the C-shaped member so as to hold these return portions at both ends, a ceiling set for a building such as a building ceiling inside and outside the electromagnetic wave shielded room, etc. The position of the finishing material or the metal plate for electromagnetic wave shielding can be adjusted without any inconvenience to the leakage of the electromagnetic wave, and the position can be adjusted after the construction due to a design error at the time of construction. Further, in the case where the flat plate portion of the C-shaped member constitutes a joint between the support fixing portion to the suspension bolt and the edge portion of the electromagnetic wave shielding metal plate, the number of parts can be further reduced, and the structure is more simplified. Although having such a configuration, high electromagnetic wave shielding performance can be exhibited.

[Brief description of the drawings]

1A and 1B show a first embodiment of an electromagnetic wave shielding structure of the present invention, in which FIG. 1A is a longitudinal sectional view in a plane including a suspension bolt, and FIG. A part enlarged view, Fig. 1
FIG. 2C is an enlarged view of a portion B in FIG.

FIG. 2 is an enlarged view of FIG. 1, wherein FIG. 2 (A) is a cross-sectional view of a main part, and FIG. 2 (B) is a plan view of FIG.

FIG. 3 is a sectional view of a main part showing a second embodiment of the electromagnetic wave shielding structure of the present invention.

FIG. 4 is a diagram showing an example of a work mode during construction according to the present invention.

5A and 5B show a third embodiment of the electromagnetic wave shielding structure of the present invention, wherein FIG. 5A is a plan view, and FIG. 5B is a view taken in the direction of an arrow E in FIG. It is an arrow D view of A).

FIG. 6 is a cross-sectional view of a state in which a fixing nut and a joining screw in FIG. 5B are tightened.

FIG. 7 is a cross-sectional view of a principal part showing a fourth embodiment of the electromagnetic wave shielding structure of the present invention.

FIG. 8 is a sectional view of a principal part showing a fifth embodiment of the electromagnetic wave shielding structure of the present invention applied to a wall surface of a building.

FIG. 9 is a sectional view of a main part of a conventional electromagnetic wave shield structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Building ceiling 2 ... Insert 3 ... Upper suspension bolt 4 ... C-shaped member 4A ... Flat plate part 4B ... Both sides 4C ... Return part 4D ... Bolt hole 4E. Screw holes 5: Metal plate for electromagnetic wave shielding 6: Connection bracket 7: Lower suspension bolt 8: Hanger 9: Ceiling assembly 10: Ceiling finishing material 11: Electromagnetic wave shield Material 12: Electromagnetic wave shielding material 13: Fixed nut 14: Joining screw 15: Deck plate 16: Hanging bracket 18: Slide hardware 19: Spot welded part

Claims (5)

[Claims] 1. An electromagnetic wave shield formed by attaching an electromagnetic wave shielding metal plate via a shield plate receiving member disposed at a predetermined interval inside a building and surrounding the room with the electromagnetic wave shielding metal plate. In the electromagnetic wave shielding structure of the room, interior materials such as a ceiling set arranged apart from the ceiling surface and the wall surface of the building in the electromagnetic wave shielding room are supported and fixed in the building via hanging bolts penetrating the shield plate receiving member, A relatively short side having a C-shaped cross section is also arranged substantially orthogonal to the ceiling surface and the wall surface of the building, which also constitutes a joint portion of an electromagnetic wave shielding metal plate. Electromagnetic wave shield structure. 2. A flat plate portion of a C-shaped member used for the shield plate receiving member constitutes a support fixing portion to the suspension bolt, and a return portion at both ends of the C-shaped member is an edge of the metal plate for electromagnetic wave shielding. The electromagnetic wave shielding structure according to claim 1, wherein the electromagnetic wave shielding material comprises a joining portion of the portions, and an electromagnetic wave shielding material is interposed between the support fixing portion and the joining portion. 3. A flat plate portion of a C-shaped material used for the shield plate receiving member constitutes a support fixing portion to the suspension bolt and a joint portion of an edge portion of the electromagnetic wave shielding metal plate, and supports and fixes these. The electromagnetic wave shielding structure according to claim 1, wherein an electromagnetic wave shielding material is interposed between the joint and the joint. 4. An interior such as a ceiling assembly or the like in a building by mounting a slide hardware between barbed portions at both ends of a C-shaped member used for the shield plate receiving member and supporting and fixing hanging bolts to the slide hardware. The electromagnetic wave shielding structure according to any one of claims 1 to 3, wherein a position of a material or the electromagnetic wave shielding metal plate is adjustable. 5. A lower suspension bolt for suspending an interior material such as the ceiling assembly is provided below a suspension bolt supported and fixed to a C-shaped member used for the shield plate receiving member and positioned inside the electromagnetic shield room. The electromagnetic wave shielding structure according to any one of claims 1 to 4, wherein an upper part of the screwed connection hardware is screwed.