JP2769971B2 - Filter box mounting structure to electromagnetic wave shield wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a filter box on an electromagnetic wave shielding wall constituting an anechoic chamber or an electromagnetic wave shielding chamber.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, when a filter box is mounted on an electromagnetic wave shielding wall 11A, an opening 12 is formed in the electromagnetic wave shielding wall 11A, and a box-shaped opening is formed in the opening 12. Of the electromagnetic wave shielding plate 1 constituting the shielding surface of the electromagnetic wave shielding wall 11A.
1a, a partition 13a made of an electric conductor is mounted inside the filter box 13, a plurality of electromagnetic filters 14 are mounted on the partition 13a, and doors 15, 16 are respectively provided at both open ends of the filter box 13. Attach. The external cable 17a and the internal cable 17b introduced into the filter box 13 from outside are connected via the electromagnetic wave filter 14.

However, in this filter box mounting structure P, the partition wall 1 provided in the filter box 13 is provided.
Since a plurality of electromagnetic wave filters 14 are installed in 3a, the filter box 13 becomes large. When such a filter box 13 is incorporated in the electromagnetic wave shielding wall 11A, it is necessary to cut out the electromagnetic wave shielding wall 11A. If this frame removal step is incorporated in the construction step, the construction work of the electromagnetic wave shielding wall 11A becomes complicated, and the construction period may be lengthened. Further, it is not easy to install the large filter box 13 so as not to interfere with the reinforcing steel or the steel frame in the electromagnetic wave shielding wall 11A.
The installation location is limited. Furthermore, filter box 1
Since 3 is exposed over a large area on the shield surface of the electromagnetic wave shield wall 11A, the electromagnetic wave shield performance of the electromagnetic wave shield wall 11A may be reduced.

Accordingly, as shown in FIGS. 7 and 8, a through hole 19 is formed in the electromagnetic wave shielding wall 11B, and the through hole 19 is formed.
9, a shield tube 20 made of a steel pipe or the like having good conductivity is inserted therethrough, and one side of the shield tube 20 is connected to the electromagnetic wave shield plate 11 forming the shield surface of the electromagnetic wave shield wall 11B.
a, and an electromagnetic wave filter 14 is connected to the other side of the shield cylinder 20. The filter box 2 provided with the electromagnetic wave filter 14 on the electromagnetic wave shield wall 11B.
An external cable 22a housed inside the filter box 21 and externally introduced into the filter box 21 and an internal cable 22b internally introduced into the shield tube 20 are connected via the electromagnetic wave filter 14.

[0005]

However, in this filter box mounting structure Q, one electromagnetic wave filter 14 is provided for each shield tube 20. Therefore, when a plurality of electromagnetic wave filters 14 are provided, the shield tube 20 must be connected to the electromagnetic wave filter. Although it is necessary to install the number of 14 in the electromagnetic wave shield wall 11B, it is not easy to install all the shield cylinders 20 so as not to interfere with the reinforcing steel, the steel frame and the like in the electromagnetic wave shield wall 11B. Limited. In addition, the plurality of shield tubes 20 are used for the electromagnetic wave shield wall 1.
Since it penetrates the shield surface of 1B and occupies a large area, the electromagnetic wave shielding performance of the electromagnetic wave shield wall 11B may be reduced. Furthermore, the electromagnetic wave shield wall 11B
When the electromagnetic wave filter 14 is added after the construction, the formation of the through hole 19 and the insertion of the shield tube 20 are required, which complicates the work and further reduces the penetration area of the shield surface of the electromagnetic wave shield wall 11B. This may increase the electromagnetic wave shielding performance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to minimize the penetration area of a shield surface of an electromagnetic wave shield wall and to be affected by the increase or decrease of an electromagnetic wave filter. An object of the present invention is to provide a structure for mounting a filter box on an electromagnetic wave shielding wall without using a filter box.

[0007]

According to the present invention, there is provided an electromagnetic wave shielding wall having a through hole formed therein.
A shield tube is inserted through the through hole, one side of the shield tube is connected to an electromagnetic wave shield plate constituting a shield surface of the electromagnetic wave shield wall, and the other side of the shield tube passes through one side of the filter box. And attaching the filter box to the electromagnetic wave shielding wall, connecting a shield box to the shield tube, connecting at least one electromagnetic wave filter outside the shield box, and attaching the electromagnetic wave filter and the shield box to the shield box. An external cable housed in a filter box and externally introduced into the filter box and an internal cable introduced from the inside through the shield cylinder into the shield box are connected via the electromagnetic wave filter.

[0008]

According to the above construction, when the filter box is mounted on the electromagnetic wave shield wall, first, a through hole is formed in the electromagnetic wave shield wall, a shield tube is inserted into the through hole, and one side of the shield tube is connected. While being connected to the electromagnetic wave shield plate, the other side of the shield tube is passed through one side of the filter box, and the filter box is attached to the electromagnetic wave shield wall. Next, one side of the shield box is connected to the shield cylinder, an electromagnetic wave filter is attached to the outside of the shield box, and after the electromagnetic wave filter and the shield box are accommodated in the filter box,
An external cable introduced from outside into the filter box and an internal cable introduced into the shield box via the shield tube are connected via the electromagnetic wave filter.

[0009] All the internal cables are inserted into one shield tube.

The increase or decrease of the electromagnetic wave filter is performed by attaching or removing the electromagnetic wave filter to or from the shield box.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a structure for attaching a filter box to an electromagnetic wave shielding wall according to an embodiment of the present invention, as viewed from the outdoor side. FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, and FIG. 4 is a cross-sectional view showing a connection structure between the electromagnetic wave filter and the shield box.

In these figures, reference numeral 1 denotes an electromagnetic wave shielding wall, and the electromagnetic wave shielding wall 1 is composed of a wall body 1a made of a concrete body and an electromagnetic wave shielding plate 1b made of copper foil or the like attached to the indoor side of the wall body 1a. It is configured. The electromagnetic wave shield wall 1 has a through hole 2 formed therein.

A shield tube 3 made of a steel tube or the like having good conductivity is inserted into the through hole 2 of the electromagnetic wave shield wall 1, and one side of the shield tube 3 is connected to the electromagnetic wave shield wall 1.
Is connected to the electromagnetic wave shield plate 1b constituting the shield surface by soldering or the like. Instead of soldering, a braided wire may be inserted and screwed.

Reference numeral 4 denotes a filter box. One side of the filter box 4 is attached to the wall main body 1a of the electromagnetic wave shielding wall 1, and one side of the filter box 4 has another side of the shield cylinder 3. The side is penetrating.

On the other side of the filter box 4, an opening 4a is formed over substantially the entire surface thereof, and the opening 4a is covered by a door 4b. One side of the door 4b is attached to the filter box 4 by a joint 4c such as a hinge, and a handle 4d is provided on the other surface of the door 4b.

Reference numeral 5 denotes a shield box, and one side of the shield box 5 is connected to the other side of the shield cylinder 3. The shield box 5 is attached to the inner surface of one side of the filter box 4 and housed in the filter box 4.

On the other side of the shield box 5, there is formed an opening 5a having a size substantially over the entire surface, and the opening 5a is covered with an opening / closing lid 5b. The opening / closing lid 5
b is a screw 5c which is detachably attached to the shield box 5. A braided wire (not shown) is sandwiched between the shield box 5 and the opening / closing lid 5b by tightening a screw 5c, and the shield box 5 and the opening / closing lid 5b are electrically connected by the braided wire. In addition, a plurality of connection holes 5 are provided outside the side surface of the shield box 5 at intervals.
d is formed. Note that a finger contact formed in a gasket shape or the like may be used instead of the braided wire.

Reference numeral 6 denotes an electromagnetic wave filter. At least one electromagnetic wave filter 6 is attached to the outside of the side surface of the shield box 5 with bolts 7 and housed in the filter box 4.

Connection terminals 6a and 6b are provided on both sides of the electromagnetic wave filter 6, one connection terminal 6a faces the inside of the filter box 4, and the other connection terminal 6b is connected to the shield through the connection hole 5d. You are in box 5. 8a is an external cable connected to the connection terminal 6a, and 8b is an internal cable connected to the connection terminal 6b.

As shown in FIG. 4, a conductive connecting member 10 such as a braided wire or a copper foil is sandwiched between the shield box 5 and the electromagnetic wave filter 6 by tightening bolts 9. The shield box 5 and the electromagnetic wave filter 6 are electrically connected by the conductive connection member 10.

The openings 5a other than those closed by the electromagnetic wave filter 6 are closed by a cover plate (not shown) attached to the outside of the side surface of the shield box 5 with screws or the like.

According to the above configuration, the assembling work is performed as follows. That is, a through hole 2 is formed in the electromagnetic wave shield wall 1, a shield tube 3 is inserted through the through hole 2, and one side of the shield tube 3 is connected to the electromagnetic wave shield plate 1 of the electromagnetic wave shield wall 1.
b, while the open / close door 4b of the filter box 4 is open, the other side of the shield tube 3 is passed through one side of the filter box 4, and the filter box 4
Is attached to the wall main body 1a of the electromagnetic wave shielding wall 1.

Next, the opening / closing lid 5b of the shield box 5
Is opened, one side of the shield box 5 is connected to the shield tube 3, and the shield box 5 is attached to the filter box 4.

Thereafter, an electromagnetic wave filter 6 is attached to the outside of the shield box 5, and the electromagnetic wave filter 6 and the shield box 5 are housed in the filter box 4.

Next, the external cable 8a is introduced into the filter box 4 from the outside and connected to the connection terminal 6a of the electromagnetic wave filter 6, and all the internal cables 8b are inserted into the single shield tube 3 so that the inside of the shield box 5 To the connection terminal 6b of the electromagnetic wave filter 6, and the external cable 8a
And the internal cable 8b. Thereafter, the open / close lid 5b of the shield box 5 is closed, and then the open / close door 4b of the filter box 4 is closed.

The internal cable 8b is connected to the shield tube 3
The external cable 8 a is shielded by the filter box 4, and the connection portion of the cables 8 a and 8 b is shielded by the electromagnetic filter 6.

To increase the number of the electromagnetic wave filters 6, a connection hole 5d is made in the shield box 5, the opening / closing lid 5b is removed, the electromagnetic wave filter 6 is attached, and the cables 8a and 8b are connected. Good. Conversely, when the electromagnetic wave filter 6 is to be reduced, the electromagnetic wave filter 6 may be removed and the connection hole 5d opened thereby may be closed by the lid.

[0029]

As described above, according to the present invention, a through hole is formed in an electromagnetic wave shield wall, a shield tube is inserted into the through hole, and one side of the shield tube forms a shield surface of the electromagnetic wave shield wall. The shield box is attached to the electromagnetic wave shield wall, and a shield box is connected to the shield cylinder, and the shield box is connected to the shield box. At least one electromagnetic wave filter is connected to the outside of the filter box, the electromagnetic wave filter and the shield box are housed in the filter box, and an external cable introduced from the outside into the filter box and the shield tube are inserted in the shield box. Connected to the internal cable introduced from the inside via the electromagnetic wave filter, To penetrate the shield surface of the shield wall can be stopped only in one of the shield tube. Therefore, the electromagnetic wave shielding performance of the electromagnetic wave shielding wall can be surely improved as compared with the related art.

In addition, since only one shield tube needs to be incorporated into the electromagnetic wave shield wall, restrictions on installation locations due to reinforcing bars, steel frames and the like are greatly reduced. Therefore, the application range of the electromagnetic wave shielding wall can be expanded as compared with the related art in combination with the improvement of the electromagnetic wave shielding performance of the above-mentioned electromagnetic wave shielding wall, and the electromagnetic wave shielding wall can be used as a fire wall or a soundproof wall.

Further, it is possible to easily cope with an increase or a decrease in the number of electromagnetic wave filters by attaching or detaching the electromagnetic wave filter to or from the shield box.

[Brief description of the drawings]

FIG. 1 is a front view of a structure for attaching a filter box to an electromagnetic wave shielding wall according to an embodiment of the present invention, as viewed from the outdoor side.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view showing a connection structure between an electromagnetic wave filter and a shield box.

FIG. 5 is a front view of a structure of attaching a filter box to an electromagnetic wave shield wall, which is one conventional example, viewed from the outdoor side.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a front view of a structure of attaching a filter box to an electromagnetic wave shielding wall, which is another conventional example, as viewed from the outdoor side.

FIG. 8 is a sectional view taken along line DD of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic wave shield wall 1b Electromagnetic wave shield plate 2 Through-hole 3 Shield cylinder 4 Filter box 5 Shield box 6 Electromagnetic wave filter 8a External cable 8b Internal cable

Claims (1)

(57) [Claims] An electromagnetic wave shield wall has a through hole formed therein, a shield tube is inserted through the through hole, and one side of the shield tube is
Connected to an electromagnetic wave shield plate constituting a shield surface of the electromagnetic wave shield wall, and penetrated the other side of the shield tube to one side of a filter box, and attached the filter box to the electromagnetic wave shield wall, and attached to the shield tube. An external cable connected to a shield box, at least one electromagnetic wave filter connected to the outside of the shield box, the electromagnetic wave filter and the shield box housed in the filter box, and externally introduced into the filter box A filter box mounting structure on an electromagnetic wave shield wall, wherein the filter box and an internal cable introduced from the inside through the shield tube into the shield box are connected via the electromagnetic wave filter.