JPH0832274A - Electromagnetic wave shield structure for through pipe - Google Patents

Abstract

PURPOSE:To obtain an excellent electromagnetic wave shield structure for through pipe in which the through pipe can be fixed surely and easily to the wall or the like of an electromagnetic wave shield room such that it can be replaced. CONSTITUTION:In the electromagnetic wave shield structure for a through pipe 10 penetrating the wall 40, having surface formed of an electromagnetic shield member, of an electromagnetic wave shield structure, the through pipe 10 is fixed to an electromagnetic shield member 42, e.g. the wall 40, by means of a split supporting metal 30. A braided wire 20 is interposed between the electromagnetic shield member 42, e.g. the wall 40 and the through pipe 10, and the supporting metal 30 and then the split supporting metal 30 is tightened rigidly by means of bolt and nut 50, 51 through the braided wire 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shield structure of a penetrating pipe which is surrounded by a wall or the like formed of an electromagnetic wave shield material and which is attached by penetrating the wall or the like in a structure in which the room is electromagnetically shielded.

[0002]

2. Description of the Related Art Generally, in electronic control, electromagnetic wave generation experiments, etc., an electromagnetic wave shielded room or an anechoic chamber is used so as not to be affected by electromagnetic waves from outside and to prevent electromagnetic waves from leaking outside. Walls, floors, ceilings, etc. are formed of an electromagnetic wave shielding material having excellent conductivity, and it is considered that the electromagnetic wave shielding material keeps a good electromagnetic wave shielding state in the room. However, even if the wall or the like is formed of an electromagnetic wave shielding material excellent in electrical conductivity,
It is necessary to attach a penetrating pipe to the electromagnetic wave shield room or the like from the outside through the wall or the like for various power lines, signal lines, air conditioning, water supply / drainage pipes and the like. Among these, although it is possible to prevent the generation of leakage electromagnetic waves by installing a noise filter on the cables for the power lines and the signal lines, there is a risk that electromagnetic waves may enter or leak through the penetration tube. Therefore, normally, this kind of penetrating tube is attached to an electromagnetic wave shielded room or the like by the method shown in FIG. A conductive penetrating pipe 110 for air conditioning, water supply / drainage piping, etc. is installed through an opening 141 formed in a floor or wall 140 of an electromagnetic wave shielding room formed of an electromagnetic wave shielding material having excellent conductivity. At that time, the peripheral portion of the conductive mounting flange 130, which is welded or soldered to the penetrating pipe 110 as indicated by 150, is substantially orthogonal to the axial direction of the penetrating pipe 110, and the electromagnetic wave on the surface of the wall 140 or the like is attached to the peripheral portion of the conductive mounting flange 130. By welding or soldering 160 to the shield material 142, the wall 140 of the electromagnetic wave shield chamber and the through pipe 110
The room was kept in a good electromagnetic wave shielding state by completely electrically connecting the room without leakage. The reason is that when the mounting flange 130 is attached to the electromagnetic wave shielding material 142 such as the wall 140 by bolts and nuts without welding, the bolts and nuts and the electromagnetic wave shielding material 142 such as the wall 140 are attached. Mounting hole and flange 130 for inserting bolts and nuts and the wall 1
This is because the electromagnetic wave leaks or intrudes through a minute gap generated between the electromagnetic wave shield material 142 of 40. It has been confirmed that by setting the length of the through tube 110 to be four times or more the inner diameter of the tube, intrusion or leakage of electromagnetic waves through the through tube can be prevented by the so-called tunnel effect.

[0003]

However, as described above, the mounting flange 130 is welded or soldered to the through pipe 110 in advance at a factory or at a construction site, and the flange 130 is used in an electromagnetic shield room or the like at the construction site. Wall 1
It is necessary to weld or solder to 40 or the like. For this reason, it is often time-consuming to attach the flange 130 to the through pipe 110 at right angles and to dimension the wall 140, etc. When it is attached to the pipe 110, it becomes bulky during transportation and the transportation efficiency is reduced. Further, after the through pipe 110 is constructed, the through pipe 11 may be modified by repairing the electromagnetic wave shielded room or the like.
When it is necessary to replace 0, the flange 1
It was necessary to remove 30 from the welding or soldering to the wall 140 or the like of the electromagnetic wave shielded room, and the disassembling work was extremely troublesome. In view of the above, the present invention solves the above-mentioned problems of the related art, and the penetration of the penetration tube having an excellent electromagnetic wave shielding effect is very reliable and easy and can be replaced with a wall of an electromagnetic wave shielding room or the like. An electromagnetic wave shield structure for a tube is provided.

[0004]

For this reason, in the present invention, a through pipe which is attached by penetrating the wall or the like in a structure in which the surface is surrounded by a wall or the like formed of an electromagnetic wave shielding material and the room is electromagnetically shielded Of the electromagnetic wave shield structure, the through pipe is attached to an electromagnetic wave shield material such as the wall by a split support fitting that sandwiches the through pipe, and a braid is provided between the through pipe and the wall or the like and the support fitting. It is characterized in that a wire is interposed, and the two-piece split support fitting is firmly sandwiched and fastened by a bolt and a nut via a braided wire, and this is a means for solving the problem.

[0005]

According to the present invention, when the through pipe 10 is attached by penetrating through the wall 40 or the like in the structure in which the surface is surrounded by the wall 40 or the like formed of the electromagnetic wave shield material and the interior of the structure is electromagnetically shielded, 10 is the through pipe 1
It is configured such that it is attached to the wall 40 or the like by a split support bracket 30 that holds 0.
No. 33 of the through-pipe sandwiched in the support wall 32
The through pipe 10 and the braided wire 20 are interposed therebetween, and the supporting wall 3
By inserting a bolt into a holding hole 34 formed in 2 and fastening it with a nut, the braided wire 20 is firmly held, and the braided wire 20 supports the through tube 10 and the split support fitting 30. Since it penetrates firmly into the wall 32, the through pipe 10, the braided wire 20 and the support wall 32 of the split support metal fitting are electrically connected to surely prevent leakage of electromagnetic waves. Next, the braided wire 20 is also placed on the flange portions 31, 31 of the split support metal fitting 30 and placed on the wall 40 or the like, and the mounting hole 35 formed in the flange portion 31.
Also, by inserting the bolt 50 into the mounting hole formed in the electromagnetic wave shielding material 42 such as the wall 40 formed corresponding to the mounting hole 35 and fastening it with the nut 51, the braided wire 20 can be obtained in the same manner as described above. Is firmly connected to the flange portion 31 of the bisecting support fitting 30, the braided wire 20, the electromagnetic wave shielding material 42 such as the wall 40, and the electromagnetic wave is surely prevented from leaking.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention, and FIG. 1 shows a state in which a two-part support fitting is sandwiched with respect to a through pipe. FIG. 2 shows A-A of FIG.
The cross section shows a state in which the through pipe is attached to a wall or the like of an electromagnetic wave shielded room or the like. The wall in a structure in which the surface is surrounded by a floor, a ceiling, a wall 40, etc. formed by an electromagnetic wave shielding material 42 having excellent conductivity such as a copper foil, a zinc iron plate, a brass plate, a silver plate, etc., and the room is electromagnetically shielded. When attaching the through pipe 10 through 40 or the like, the through pipe 1
Reference numeral 0 denotes a structure in which the through pipe 10 is attached to the wall 40 or the like by a split support metal fitting 30 that sandwiches the through pipe 10.
The split support fitting 30 is composed of a pair of members having an L-shaped cross section and is arranged so as to face each other, and includes a flange portion 31 parallel to the wall 40 and the like and an upright support wall 32 orthogonal to the flange 31. To be done. The pair of opposing support walls 32 are provided with sandwiching portions 33, 33 whose inner surfaces are adapted to the diameter of the through pipe 10 each having a semi-cylindrical shape, and
Bolts and nuts 5 for fastening both support walls 32
Holding holes 34, 34 for inserting 0, 51 are formed. On the other hand, in the flange portion 31 parallel to the wall 40 and the like, the split support metal fitting 30 is attached to the wall 40 such as the electromagnetic wave shield room.
Mounting holes 35, 35 for inserting bolts / nuts 50, 51 for mounting on the same are formed.

In order to mount the through pipe 10 and the support metal fitting 30 having the above-mentioned structures on the wall 40 of the electromagnetic wave shield room or the like at the construction site, as shown in FIG.
Of the through pipe 10 between the sandwiching portions 33, 33 of the pair of support walls 32.
Is sandwiched between the braided wires 20 and the bolts 5 are inserted in the sandwiching holes 34 formed in the support wall 32.
By inserting 0 and fastening it with the nut 51, the holding portions 33 of the pair of support walls 32 of the support fittings 30 and the outer periphery of the through tube 10 firmly hold the braided wire 20, and the braided wire 20 Through pipes 10 and 2
Since the bite firmly digs into the support wall 32 of the split support fitting 30, the through tube 10, the braided wire 20 and the support wall 32 of the split support fitting are electrically connected to surely prevent electromagnetic waves from leaking. Then, the braided wire 20 is also interposed between the flange portions 31 and 31 of the split support metal fitting 30 and the wall 40.
Mounting hole 3 placed on the flange part 31
5 and the mounting hole formed in the electromagnetic wave shielding material 42 such as the wall 40 formed corresponding to the mounting hole 35.
By inserting the braided wire 20 and tightening it with the nut 51, the braided wire 20 can be firmly sandwiched in the same manner as described above.
The flange portion 31 of the split support fitting 30, the braided wire 20, the wall 40, etc. are electrically connected to surely prevent electromagnetic waves from leaking. In this way, it is possible to easily attach the two-piece support bracket for attachment to the through pipe at the construction site, and attach the support bracket to the through pipe at the factory in advance to efficiently perform the work at the construction site. There is no reduction in transportation efficiency due to going. Further, even in the installation work at the construction site, no special skill is required for the right angle alignment of the support fittings with respect to the through tube and the dimension alignment with respect to the wall and the like. Further, when it becomes necessary to replace the penetration pipe after the construction of the penetration pipe due to repair of the electromagnetic shielding room, etc., the supporting metal fittings can be easily removed from the wall of the electromagnetic shielding room, etc. Is quite simple.

Next, FIG. 3 shows a second embodiment of the present invention. This embodiment has the same basic structure as that of the first embodiment, but the flange portion 31 of the split support metal fitting 30 of the first embodiment is attached to the wall 40 or the like of the electromagnetic wave shielded room. On the other hand, while the bolts and nuts 50 and 51 are used for fastening, the split support fitting 3 of this embodiment is used.
The flange portion 31 at 0 is the wall 4 of the electromagnetic wave shielded room or the like.
It is different in that it is welded to 0 or the like by welding or soldering 53. In the present embodiment, the flange 31 of the split support member 30 is electrically connected to the peripheral edge of the wall 40 or the like of the electromagnetic wave shielded room where it is attached by welding 53 or the like so that the electromagnetic wave is securely leaked. First
It is not necessary to dispose the braided wire 20 between the flange portion 31 and the electromagnetic wave shielding material 42 such as the wall 40 of the electromagnetic wave shielding chamber as in the embodiment, and the cost can be reduced. With the electromagnetic wave shield structure having the above configuration, a shielding rate of 60 dB or more in an electromagnetic wave shield room or the like can be ensured, and an electromagnetic wave shield structure for a penetration tube having no practical problems can be obtained.

Although the embodiments have been described above, within the scope of the present invention, the shape of the split support metal fitting, for example, the flange portion is made circular according to the shape of the opening of the wall of the electromagnetic wave shielding room or the like. Or, the inner surface shape of the sandwiching portion of the split support metal fitting is made polygonal according to the cross-sectional shape of the through pipe, and between the penetration pipe and the split support metal fitting and the wall of the electromagnetic wave shield room or the like. It goes without saying that, as the shape of the interpositioned braided wire, for example, a single piece can be folded into an appropriate shape, or a plurality of pieces can be combined.

[0010]

As described above in detail, in the present invention, the surface is surrounded by the wall or the like formed of the electromagnetic wave shielding material, and the interior of the structure is shielded by the electromagnetic wave. In the electromagnetic wave shield structure of the through pipe, the through pipe is attached to the wall or the like by a split support metal fitting that holds the through pipe.
A braided wire is interposed between the penetrating pipe, the wall, etc. and the supporting metal fitting, and the two-piece split supporting metal fitting is firmly clamped by bolts and nuts through the braided metal wire and fastened, so that the mounting Support metal fittings can be easily attached to the through-pipe at the construction site, and the transportation efficiency is reduced by attaching the support metal fittings to the through-pipe in the factory in advance in order to efficiently perform the work at the construction site. Absent. Further, even in the installation work at the construction site, no special skill is required for the right angle alignment of the support fittings with respect to the through tube and the dimension alignment with respect to the wall and the like. Further, when it becomes necessary to replace the through-pipe after the construction of the through-pipe by repairing the electromagnetic wave shield room or the like, the through-pipe can be easily removed from the wall of the electromagnetic wave shield room, etc. Is quite simple. Further, when the support fitting is detachably attached to the wall or the like with bolts and nuts, if it is necessary to replace the penetrating pipe due to repair of the electromagnetic wave shielded room after construction of the penetrating pipe, The through tube together with the metal fitting can be easily removed from the wall of the electromagnetic wave shielded room or the like. Furthermore, since it is supported by the split support metal fittings, vertical force can be reliably supported even when the through pipe is attached to the floor. As described above, the present invention solves the above-described problems of the related art, and the attachment of the through pipe to the wall or the like of the electromagnetic shield room is extremely reliable and easy and can be replaced, but the electromagnetic shield effect is excellent. It is possible to provide an electromagnetic wave shield structure for a through tube.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, showing a state in which a split support metal fitting is arranged to be sandwiched with respect to a through pipe.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, showing a state in which a penetrating pipe is attached to a wall or the like of an anechoic chamber.

FIG. 3 shows a second embodiment of the present invention and shows a state in which a penetrating pipe is attached to a wall or the like of an anechoic chamber.

FIG. 4 is a view showing a conventional electromagnetic wave shield structure for a through tube.

[Explanation of symbols]

 10 Through Pipe 20 Braided Wire 30 Split Support Metal Fitting 31 Flange Part 32 Support Wall 33 Clamping Part 34 Clamping Hole 35 Mounting Hole 40 Wall 41 Opening 42 Electromagnetic Shielding Material 50 Bolt 51 Nut 53 Welding or Soldering

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16L 5/02 H02G 3/22 Z

Claims (1)

[Claims] 1. An electromagnetic wave shield structure of a penetrating pipe, the surface of which is surrounded by a wall or the like formed of an electromagnetic wave shield material and which is attached through the wall or the like in a structure in which the interior is electromagnetically shielded, wherein the penetrating pipe is It is attached to an electromagnetic wave shielding material such as the wall by a split support metal fitting that holds the through pipe, and a braided wire is interposed between the through pipe and the wall or the like and the support metal to support the split support. The metal fitting is an electromagnetic wave shield structure for a through-pipe characterized by being firmly sandwiched and fastened with bolts and nuts via a braided wire.