JPH104285A - Cable through-hole processing structure of electromagnetic shield layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a cable through-hole processing structure which is capable of easily and cheaply shutting off conductive noises without installing an existing noise filter and providing a large space. SOLUTION: A metal duct 4 is made to penetrate through an electromagnetic shield layer 2a, the shielding material of the electromagnetic shield layer 2a is electrically connected to the metal duct 4, a cylinder 5 of electromagnetic shielding material whose one end is connected to the metal duct 4 is provided so as to extend to the metal duct 4, a cable 6 provided inside the metal duct 4 is made to penetrate through the cylinder 5, and the other end of the cylinder 5 is bound down from above the cable 6 to be sealed up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for processing a cable penetration portion of an electromagnetic shield layer.

[0002]

2. Description of the Related Art In recent years, cordless use of extension telephones in buildings has been planned mainly in buildings (hospitals, hotels, etc.) having a high work ratio of mobility. In addition to the use of cordless extension telephones, various types of OA terminals have been made wireless and millimeter-wave communication has been introduced.

[0003] However, in the introduction of these, it is generated from circuits of electronic equipment such as computers, medical equipment, cooking equipment, lighting equipment and the like used in the building to prevent interference caused by similar extension handsets in adjacent buildings. Electromagnetic shielding performance is required to prevent communication failures caused by electromagnetic waves.

In connection with wiring of electric cables,
Normally, in a high-performance shield facility such as an anechoic chamber, a noise filter 1 as shown in FIG. 5 is installed in each phase of a circuit at a shield penetration part of an electric cable in order to cut off internal and external conductive noise. ing.

[0005]

Providing the noise filter 1 in all circuits penetrating the shield layer as described above means that all circuits for general power, communication, disaster prevention or special on-line circuits are used. This means that one noise filter is installed for each phase. If this is applied to a general office, the filter installation space (close to the shield layer) becomes extremely large due to the type and amount of circuit. Become.

Further, the noise filter 1 itself is relatively expensive, and the large number of the filters necessitates troublesome work such as connection work and architectural accompanying work (design considerations, etc.). However, the initial cost increases significantly.

[0007] In addition, in the future, there will be an increase in power demand, and changes or additions to tenant work or the like will be extremely complicated.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide an electromagnetic shield layer capable of simply and inexpensively blocking conductive noise without installing an existing noise filter, saving space, and saving space. It is an object of the present invention to provide a structure for treating a cable penetration portion.

[0009]

According to the present invention, in order to achieve the above object, first, an electromagnetic shield layer is penetrated by a metal duct, and a shield material of the electromagnetic shield layer is electrically connected to the metal duct. Then, a cylinder made of an electromagnetic shielding material having one end connected to the metal duct is provided so as to extend to the metal duct, and cables laid in the metal duct also penetrate the cylinder, and The other end of the cable is tied up from the cables and sealed. Second, the cylinder extends on both sides of the metal duct, and the cable at the other end of each cylinder on both sides of the electromagnetic shield layer. Thirdly, a plurality of cylinders are provided in a stack, and fourthly, a conductive filler such as a conductive gasket and a conductive sealing material is disposed at a binding end to reduce a gap. The idea is to unite afterwards.

According to the first aspect of the present invention, even if there is a gap between the metal duct and the cables laid in the metal duct, the extension of the gap is a cylindrical body made of an electromagnetic shielding material. In addition, since the metal duct has electrical connection with the shielding material of the electromagnetic shield layer, the conductivity of the cylinder, the metal duct, and the electromagnetic shield layer is continuous, and it is a unit of bundle of cables to be bundled. The conduction noise can be cut off.

According to the second aspect of the present invention, in addition to the above-described operation, since the conductive noise can be cut off by the cylindrical body on both sides of the electromagnetic shield layer, the shielding performance is improved.

According to the third aspect of the present invention, multiple shields can be formed by stacking a plurality of cylinders made of an electromagnetic shield material, so that the shield performance is high.

According to the present invention, the binding end of the cylindrical body is provided with the conductive filler to reduce the gap, so that the shielding performance is high.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall cross-sectional plan view showing an embodiment of a structure for treating a cable penetration portion of an electromagnetic shield layer according to the present invention, and FIG. 2 is a partially cutaway plan view showing a main part of the electromagnetic shield layer. The electromagnetic shield room surrounded by 2a indicates the outside.

The electromagnetic shield layer 2a is a wall coated with a conductive material on its surface or provided with a shielding material such as a metal foil or a metal plate to provide electromagnetic shielding performance. I do.

A metal duct 4 is provided so as to penetrate the electromagnetic shield layer 2a, and a cylindrical body 5 made of an electromagnetic shield material having one end connected to the metal duct 4 is provided so as to extend. The metal duct 4 is electrically connected to the conductive material of the electromagnetic shield layer 2a. The electromagnetic shielding material constituting the cylindrical body 5 is desirably thin and flexible, such as a conductive nonwoven fabric, a conductive cloth, a metal foil, a conductive plastic foil, or a conductive synthetic paper. .

The cables 6 are laid so as to penetrate the metal duct 4. At this time, the cylinder 5 is also penetrated, and the end of the cylinder 5 connected to the metal duct 4 is reversed. The ends are bundled from above the cables 6 and sealed.

In order to complete the sealing completely, a conductive filler 7 such as a conductive gasket or a conductive sealing material such as stainless cilia is disposed at the binding end to reduce the gap and then bind.

As described above, there is a gap between the metal duct 4 and the cables 6. The extension of the gap is covered by the cylindrical body 5 made of the electromagnetic shielding material. 4 has electrical connection with the shield material of the electromagnetic shield layer 2, the conductive properties of the cylinder 5, the metal duct 4, and the electromagnetic shield layer 2 are continuous, and the conductive noise is a unit of a bundle of cables 6 to be bound. Can be cut off.

FIG. 3 shows a second embodiment of the present invention. A plurality of cylinders 5 are provided so as to extend on both sides of a metal duct 4, and each cylinder 5 is provided on both sides of an electromagnetic shield layer 2a. The cables 6 are bound at the other end.

By sealing the metal duct 4 on both sides in this manner, the shielding performance is improved, and it is possible to cope with a case where the required level of the shielding performance is high.

FIG. 4 shows a third embodiment of the present invention, wherein a plurality of cylinders 5 are provided. By doing so, multiple shields can be formed, and the shielding performance is high as in the second embodiment.

Further, the shielding performance can be further improved by combining the second embodiment in FIG. 3 and the third embodiment in FIG.

[0024]

As described above, according to the present invention, the structure for treating the cable penetrating portion of the electromagnetic shield layer does not require installation of an existing noise filter, does not take up space, and is simple and inexpensive. It can be shut off.

[Brief description of the drawings]

FIG. 1 is an overall cross-sectional plan view showing a first embodiment of a cable penetration portion processing structure of an electromagnetic shield layer of the present invention.

FIG. 2 is a partially cutaway plan view showing a main part of the first embodiment of the structure for processing a cable penetration portion of an electromagnetic shield layer of the present invention.

FIG. 3 is a cross-sectional plan view of a main part showing a second embodiment of a cable penetration part processing structure of an electromagnetic shield layer of the present invention.

FIG. 4 is a cross-sectional plan view of a main part showing a third embodiment of a cable penetrating portion processing structure of an electromagnetic shield layer of the present invention.

FIG. 5 is a perspective view of a noise filter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Noise filter 2 ... Electromagnetic shield room 2a ... Electromagnetic shield layer 3 ... Outside 4 ... Metal duct 5 ... Cylindrical body 6 ... Cables 7 ... Conductive filler

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kikuo Nakagawa 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Yukio Toda 4--14 Suehiro, Kumagaya-shi, Saitama No. 1 Inside the Riken Kumagaya Plant (72) Inventor Shogo Kinoshita 4-14-1 Suehiro, Kumagaya City, Saitama Prefecture Inside the Riken Kumagaya Plant (72) Inventor Hiroshi Kawamoto 4-14 Suehiro, Kumagaya City, Saitama Prefecture No. 1 Inside the Riken Kumagaya Office

Claims (4)

[Claims] 1. A cylindrical body made of an electromagnetic shield material having an electromagnetic shield layer penetrated by a metal duct, electrically connecting a shield material of the electromagnetic shield layer to the metal duct, and having one end connected to the metal duct. Is provided so as to extend to the metal duct, the cables laid in the metal duct also penetrate the cylindrical body, and the other end of the cylindrical body is bound from above the cables and sealed. Characteristic electromagnetic shield layer cable penetration processing structure. 2. A cable penetrating portion of an electromagnetic shield layer according to claim 1, wherein the cylindrical body extends on both sides of the metal duct, and binds cables at the other end of each cylindrical body on both sides of the electromagnetic shield layer. Processing structure. 3. The structure for treating a cable penetration portion of an electromagnetic shield layer according to claim 1, wherein the plurality of cylinders are provided so as to overlap with each other. 4. The electromagnetic shielding layer according to claim 1, wherein a conductive filler such as a conductive gasket or a conductive sealing material is disposed at a binding end to reduce gaps and then bind. Cable penetration part processing structure.