JP2003060379A - Through-part processing structure of electromagnetic shielding layer, through-part processing member and conductor wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the electromagnetic shielding performance of a through- part of an electromagnetic shielding layer, partitioning an electromagnetic shield space from a non-electromagnetic shield space. SOLUTION: A conductor line 11 pierces a through-hole 12 of an electromagnetic shielding layer 10. An insulative magnetic body 14, such as ferrite, is provided in front of the through part of the line 11, so as to cover the outside of an insulator of the conductor line 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic shield used in office buildings, factories, hospitals, etc., for preventing intrusion and leakage of radio communication radio waves and effectively performing radio communication indoors. More specifically, the present invention relates to a technique for drawing in a conductor wire such as an electric wire penetrating an electromagnetic shield portion.

[0002]

2. Description of the Related Art With the recent advancement of information technology, office buildings,
Attention is being paid to the use of wireless communication in leading-edge factories aimed at unmanned operation and in hospitals where the latest medical equipment is introduced. Wireless LA
In order to perform good wireless communication centered on N indoors, that is, to sufficiently exhibit its performance, it is necessary to ensure that the signal wave emitted by the transmitter can be received by the receiver.

However, when a wireless LAN or the like is widespread and wireless communication is simultaneously performed in a plurality of adjacent buildings, radio waves in a narrow frequency band are shared by the respective wireless communication devices.
It is feared that the radio waves transmitted by wireless communication devices other than itself become noise, and the ability to transmit and receive will be significantly reduced.

As a countermeasure against this, there has been proposed an electromagnetic shield building for preventing electromagnetic waves from entering from the outside (the outside may include other floors of the same building) on the building side. Electromagnetic Shielding Buildings use electromagnetic shielding materials such as copper foil, iron foil, and metallic non-woven fabric to perform electromagnetic shielding inside the building.

On the other hand, in order to use a personal computer, a telephone or the like inside the electromagnetic shielded space, it is necessary to break the electromagnetic shield and draw so-called conductor wires such as a power supply and a communication cable from the outside into the electromagnetic shielded space. In such a case, it is effective to use a power supply filter or a communication line filter to cut off unnecessary noise, but it is expensive and difficult to construct.

The impedance (resistance) of such a noise cut filter is determined in advance at the design stage (usually 50 ohms), and when the impedance is not constant on both the power supply side and the load side such as in an electromagnetic shield building. In many cases, the electromagnetic shielding effect of the filter is not fully exerted. Therefore, as a simple method for treating the electromagnetic shield penetration portion in consideration of these, a method of utilizing the electromagnetic shield effect of the waveguide has been proposed.

[0007]

However, even when a waveguide is used, when a conductor wire penetrates the inside, it acts as a coaxial tube, so that the conductor wire and the waveguide are electrically connected. If not taken, sufficient electromagnetic shielding performance cannot be exhibited. On the contrary, the waveguide may be a good passage for electromagnetic waves. Such a coaxial tube effect can occur inside a metal conduit tube, and measures for electromagnetic shielding are needed again.

In order to exert the electromagnetic shielding effect by using the waveguide, nothing must be penetrated inside the waveguide, or even if it is penetrated, only the non-conductor should be penetrated. However, if a so-called conductor wire such as an ordinary electric wire or cable is penetrated inside the waveguide,
Since the waveguide functions as a coaxial tube as described above, the electromagnetic shield function is greatly reduced.

As shown in FIG. 1, the waveguide exhibits the electromagnetic shielding effect, as shown in FIG.
From the relationship between the tube width D and the tube length L, it can be explained that an electromagnetic wave having a long wavelength cannot pass. On the other hand, as shown in FIG. 2, when the conductor wire 2 such as an electric wire penetrates the inside of the waveguide 1, it acts as a coaxial tube, so that the electromagnetic wave E can be transmitted very well regardless of the wavelength. Become.

The coaxial tube is known as a good transmission path, and a coaxial cable used for sending a radio wave received by an antenna is one of them. With coaxial cables,
Electromagnetic waves travel around the core wire while rotating inside a shield layer such as a shielding aluminum tape. Similar to the function of the coaxial cable, an electric current flows on the conductor wire 2, and the magnetic field advances while rotating around the conductor wire as shown in FIG. 2, and as a result, the electromagnetic wave E passes through the inside of the waveguide 1. It will pass.

Such passage of electromagnetic waves can also occur in the through holes 4 provided in the electromagnetic shield material 3, as shown in FIG. That is, when the conductor wire 2 is penetrated through the through hole 4 of the electromagnetic shield material 3, the through hole 4 itself has the same function as the waveguide 1 shown in FIG. 2, so that the electromagnetic wave passes through the through hole 4. It will be.

Therefore, the inventor of the present invention has considered that it is necessary to develop a technique for suppressing the shield destruction related to the passage of the conductor wire in the penetrating portion of the electromagnetic shield material. In particular, since an electromagnetic shield building is generally required to have an electromagnetic shield performance of about 40 dB, it is more preferable that the technology can effectively exhibit the electromagnetic shield performance of at least about 40 dB.

An object of the present invention is to prevent destruction of the electromagnetic shield as much as possible when the conductor wire is passed through the electromagnetic shield layer which defines the electromagnetic shield space and the non-electromagnetic shield space.

[0014]

The inventor of the present invention can solve the above-mentioned problems if the coaxial effect based on the passage of a conductor wire such as an electric wire through the penetrating portion provided in the electromagnetic shield layer can be suppressed. We thought that a solution could be achieved by increasing the impedance of the conductor wire that passes through the penetration to prevent electromagnetic waves from passing as much as possible.

The impedance (Z) is Z = √ (μ /
Since it is given by ε), a means for increasing the magnetic permeability μ or lowering the dielectric constant ε may be considered. That is, the present invention is a penetrating portion processing structure of an electromagnetic shield layer that allows a conductor wire such as an electric wire to penetrate the penetrating portion of the electromagnetic shield layer that defines the electromagnetic shield space and the non-electromagnetic shield space, and penetrates the penetrating portion. An insulating magnetic body is provided on the outer periphery of the insulating portion of the conductor wire on the side of the conductor wire exposed to the non-electromagnetic shield space.

By providing the above-mentioned insulating magnetic body having a sufficient thickness and length around the insulator of a conductor wire such as an electric wire or a cable, the impedance of the conductor wire is increased to make it difficult for electromagnetic waves on the conductor wire to pass therethrough. As a result, the electromagnetic shielding property can be improved. The mounting thickness, length, and mounting pitch of the insulating magnetic body may be appropriately set according to the wavelength of the electromagnetic wave to be shielded and the characteristics of the magnetic material.

Further, since the unnecessary electromagnetic waves which become noises transmitted through the conductor wire have a strong characteristic of jumping out into the space, the insulating property is provided at the position immediately before the penetration portion on the non-electromagnetic shield space side of the conductor wire which penetrates the penetration portion of the electromagnetic shield layer. Providing a magnetic material can effectively prevent such noise from being scattered into the space. As the insulating magnetic body, ferrite or the like having a high magnetic permeability μ and a high insulating property may be used.

Further, in order to improve the electromagnetic shielding property in the penetration processing portion, a means for improving the shielding property of the conductor wire itself can be considered. That is, the present invention is a conductor wire having a covering portion such as an electric wire penetrating a penetrating portion of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space, and an outer shield is provided outside the covering portion. It is characterized in that a layer is provided.

The conductor wire is a coaxial cable, and the outer shield layer is insulated from the inner shield layer provided inside the covering portion via the covering portion. Characterize.

Further, the conductor wire having the above structure may be used in the structure for processing the penetrating portion of the electromagnetic shield layer having the above structure. That is, the conductor wire having the above-described configuration is a side of the conductor wire that is exposed to the non-electromagnetic shield space when the penetrating portion of the electromagnetic shield layer that defines the electromagnetic shield space and the non-electromagnetic shield space is passed through the conductor wire. Then, an insulating magnetic material is provided on the outer periphery of the outer shield layer.

Further, as a structure in which such a conductor wire is applied to the penetration processing structure of the electromagnetic shield layer, the present invention is such that the penetration portion of the electromagnetic shield layer that defines the electromagnetic shield space and the non-electromagnetic shield space is covered with an electric wire or the like. In the penetrating portion processing structure of the electromagnetic shield layer when penetrating a conductor wire having, the conductor wire is provided with an outer shield layer outside the covering portion, and the outer shield layer and the penetrating portion. ,
It is characterized in that it is electrically connected through a conducting means. The conductor wire used in such a structure is a coaxial cable, and the outer shield layer is insulated from the inner shield layer provided inside the covering portion via the covering portion. It is characterized by

The conventional conductor wire, whether it is a coaxial cable or a power supply wire, is provided with a protective layer as a covering portion for protecting the inner core wire and the like. For example, a coaxial cable having a conventional configuration is composed of an inner shield layer that covers the core wire and an insulating coating portion that protects the inner shield layer, and the inner shield layer is centered around the core wire. The electromagnetic waves will proceed while rotating.

Therefore, there is a problem in that if the shield layer is scratched even a little, noise easily enters from there. However, by providing the outer shield layer separately outside the inner shield layer as in the present application, it is possible to sufficiently secure the electromagnetic shield performance and significantly suppress noise.

Further, in the conventional power supply line, a protective layer for protecting the inner core wire is provided as a covering portion similarly to the coaxial cable, but the inner shield layer is not provided. Therefore, it can be said that the power supply line is originally not suitable for use in a structure in which such an electromagnetic shield layer is penetrated.

Therefore, in the present invention, the external shield layer is provided as described above to impart electromagnetic shielding properties to the conductor lines such as the power source line and the coaxial cable.

In the structure in which the outer shield layer is provided outside the covering portion of the conductor wire, when the conductor wire penetrates the electromagnetic shield layer, it is necessary to electrically connect the electromagnetic shield layer and the outer shield layer. By using the penetration processing member of the present invention, such electrical connection can be simplified.

That is, according to the present invention, a conductor wire such as an electric wire penetrating a penetrating portion of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space, and a penetrating wire for electrically connecting the electromagnetic shield layer. A processing member, a main body provided in an opening of the electromagnetic shield layer, a through opening provided in the main body for penetrating the conductor wire, and a through hole provided in the through opening and penetrating the conductor wire. And a conductive member in contact with the conductor wire. The conductive member is formed in a net shape and stretched over the through opening.

The net-like structure inevitably causes the net to come into contact with the outer shield layer when the conductor wire is passed through the net, so that electrical connection can be naturally made.
Alternatively, the broken net may be inevitably brought into contact with the outer shield layer by passing the conductor wire so as to break the mesh structure.

In the present invention, the penetration means is a conductive member provided in an opening of the penetration portion of the electromagnetic shield layer, as a construction in which the penetration treatment member having such a construction is applied to the penetration portion treatment structure of the construction. It is a means for bringing the outer shield layer of the conductor wire into contact with the conductive member by penetrating the conductor wire.

Further, as a structure for improving the electromagnetic shield performance in such a penetrating portion, reducing the number of conductor wires to be passed is also an effective method. Therefore, for example, an electric wire as a conductor wire is branched by a distribution board, a terminal board, etc. outside the electromagnetic shielded space, and in the conventional method of drawing the branched electric wire into the electromagnetic shielded space, the electric wire must pass through the penetrating portion. The number of conductor wires increases.

Therefore, the number of conductor wires passing through the penetrating portion can be reduced by basically adopting a method of branching the conductor wires after entering the electromagnetic shield space. That is, the present invention is a penetration portion processing structure of an electromagnetic shield layer for penetrating a conductor wire such as an electric wire through the penetration portion of the electromagnetic shield layer that defines the electromagnetic shield space and the non-electromagnetic shield space, and the conductor wire is In the electromagnetically shielded space, the distribution board and / or the terminal board is opened and branched. The conductor wire is characterized in that the penetration processing structure of the electromagnetic shield according to any one of the above configurations is adopted in a penetration portion of the electromagnetic shield layer.

By adopting such a structure, for example, the conductor wire penetrating the penetrating portion of the electromagnetic shield layer can be divided into the conductor wires passing through the penetrating portion by the number of branch wires branched in the electromagnetic shield space. The number can be reduced.

The present invention ensures an electromagnetic shield performance of at least about 40 dB in any of the above configurations.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

(Embodiment 1) FIG. 4A is a schematic view showing a state where a conductor wire is penetrated through an electromagnetic shield layer, and FIG. 4B is a state where an insulating magnetic material is provided on the conductor wire. It is a principal part perspective view which shows partially. In FIG. 4, the electromagnetic shield layer 10 made of the electromagnetic shield material that constitutes the electromagnetic shield space is schematically shown as a substantially rectangular plane for easy visualization.

A conductor wire 11 is provided on the electromagnetic shield layer 10.
Through the through hole 12 provided in the electromagnetic shield layer 10, the non-electromagnetic shield space 13a is drawn into the electromagnetic shield space 13b. In FIG. 4, the conductor wire 11 drawn into the electromagnetic shield space 13b is shown by a broken line.

The conductor wire 11 may be, for example, an electric wire, a cable or the like. The conductor wire 11 is generally composed of a core wire that conducts electricity and an insulating layer provided around the core wire. An insulating magnetic body 14 made of an insulating material having a high magnetic permeability μ is provided around the insulating layer. The insulating magnetic body 14 may be formed of, for example, ferrite having an insulating property and a high magnetic permeability.

The shape of the insulating magnetic body 14 may be any shape as long as it can surround the outer periphery of the insulating layer of the conductor wire 14. In the case shown in FIG. 4, the insulating magnetic body 14 is formed in, for example, a substantially short tubular shape, and the insulating layer of the conductor wire 11 is brought into contact with the inner wall of the insulating magnetic body 14 to surround the outer periphery thereof. Has been formed.

Further, in the case shown in FIG. 4, a plurality of such insulating magnetic bodies 14 are provided at a predetermined interval, and are provided before the conductor wire 11 is drawn in from the through hole 12. That is, the insulating magnetic body 14 is provided in the portion of the conductor wire 11 on the nonmagnetic space 13a side.

In this way, the insulating magnetic body 14 is formed in the through hole 1
The impedance of the conductor wire 11 can be increased by providing it around the insulating layer of the conductor wire 11 before entering 2, and for example, it is difficult for a spiral current to flow on the conductor wire 2 as shown in FIG. can do. In addition, if it is provided immediately in front of the through hole 12, it is possible to prevent leakage of unnecessary electromagnetic waves transmitted on the conductor wire 11 to the non-electromagnetic shielded space.

The length L1 and the thickness D1 of the insulating magnetic body 14,
The mounting pitch P1 may be appropriately set according to the wavelength of the electromagnetic wave to be shielded and the electromagnetic shield performance of the electromagnetic shield material forming the electromagnetic shield layer 10.

(Embodiment 2) In the above embodiments, the structure of the conductor wire passing through the electromagnetic shield layer was not particularly mentioned, but in the present embodiment, the conductor wire is provided with the electromagnetic shield performance. Is proposed.

FIG. 5A is a partial perspective view showing a cross-sectional structure of the conductor wire according to the present invention in which an outer shield layer is provided when the conductor wire is configured as a coaxial cable.
FIG. 7B is a partial perspective view showing a cross-sectional structure of a conductor wire having a conventional structure in which an outer shield layer is not provided.

In the case shown in FIG. 5A, the conductor wire 20 of the present invention comprises a core wire 21 for conducting electricity, a dielectric layer 22 surrounding the core wire 21, and an inner shield layer 23 surrounding the dielectric layer 22.
And a covering portion 24 surrounding the shield layer 23 and the covering portion 2
4 and an outer shield layer 25 surrounding it. The covering portion 24 functions as an insulating layer.

The outer shield layer 25 is configured to serve as a protective layer for the conductor wire 20. That is, the outer shield layer 25 functions as an exterior coating.

By using the conductor wire 20 having such a structure instead of the conductor wire 11 in the structure described in the first embodiment, the electromagnetic shield performance is remarkably improved as compared with the case where the conductor wire 20 is not used. Can be improved.

Incidentally, Japanese Patent Laid-Open No. 5-21981 discloses that
Although a structure in which the shield layer of the shielded cable is electrically connected to the electromagnetic shield layer is disclosed as an electromagnetic wave leakage prevention structure, the conductor wire 20 having the above-described structure of the present invention has a structure different from that of the shielded cable. There is.

In the shielded cable disclosed in the above publication, only one shield layer is formed, and for the electrical connection of the shield layer to the electromagnetic shield layer, the second insulating layer covering the shield layer is purposely peeled off. It is a configuration to be connected. The shield layer electrically connected to the electromagnetic shield layer is provided with only one layer in the configuration described in this publication, and there is a risk of causing damage when the second insulating layer to be covered is peeled off. If the shield layer, which is only one layer, is scratched, noise easily enters and the radio wave (signal) passing through the core wire is deteriorated.

However, the structure of the present invention has a two-layer structure in which the inner shield layer 23 and the outer shield layer 25 are provided through the covering portion 24 as an insulating layer, and the electromagnetic wave generated by the outer shield layer 25 is used. It can be electrically connected to the shield layer 10 and also functions as an exterior coating.

Therefore, unlike the case described in the above publication, it is not necessary to peel off the coating layer in order to secure the electrical connection, and the outer shield layer 25 also serving as a protective layer is directly used as the electromagnetic shield layer 10. It suffices to make an electrical connection, and it is possible to avoid damage to the inner shield layer 23 that induces the intrusion of noise that deteriorates the radio wave passing through the core wire 21, and the electromagnetic shield performance is ensured.

Further, since the outer shield layer 25 for electrical connection, which is separated from the inner shield layer 23 via the covering portion 24, is provided in advance, unlike the shielded cable disclosed in the publication, the construction work is not performed. It does not take time and effort to peel off the exterior coating each time, and construction can be shortened.

When the conductor wire 20 having such a structure is penetrated through the through hole of the electromagnetic shield layer 10, an electrical connection is made between the outer shield layer 25, which is the exterior coating of the conductor wire 20, and the electromagnetic shield layer 10. You just have to do it.

In the above description, when the conductor wire 20 is a coaxial cable, the outer shield layer 25 is provided outside the covering portion 24. However, as shown in FIG. 6, the conductor wire 20 is used as a power supply wire. A similar configuration is also conceivable when configured.

FIG. 6A is a partial perspective view showing a cross-sectional situation of the power supply line of the present invention, and FIG. 6B is a partial perspective view showing a cross-sectional situation of the power supply line of the conventional structure. In the case shown in FIG. 6A, the two core wires 31a and 31b of the power supply wire are covered with an insulating layer 32 such as vinyl. Core line 31
The insulating layer 32 covering a and 31b is protected by a covering portion 33 made of polyethylene or the like. The entire outer side of the covering portion 33 is covered with the outer shield layer 34.

The conductor wire 20 thus configured as the power supply wire
However, like the case of configuring the coaxial cable,
The outer shield layer 34 is replaced with the through hole 1 of the electromagnetic shield layer 10.
By electrically connecting to the power supply line 2, electromagnetic shielding performance can be imparted to a power supply line having a conventional configuration that does not have such a shield layer configuration.

Incidentally, in the case of the conventional structure, FIG.
As shown in FIG. 5, the insulating layer 32 that covers each of the two core wires 35a and 35b is covered with the covering portion 33, and the structure corresponding to the outer shield layer as in the present invention is not provided.

(Embodiment 3) In the present embodiment, a configuration will be described in which the outer shield layer of the conductor wire described in the second embodiment can be easily electrically connected to the through hole of the electromagnetic shield material. explain.

Whether the coaxial cable or the power supply line is configured, a metal wire may be used to electrically connect the outer shield layer provided on the conductor wire to the through hole provided in the electromagnetic shield material. It is troublesome to secure an electrical connection using such a metal wire every time construction is performed.

Therefore, the present inventor invented a penetration processing member 40 as shown in FIG. 7 (A). By using the penetration processing member 40, electrical connection processing can be performed extremely easily.

As shown in FIG. 7A, the penetration processing member 40 has a plate 41 formed of a material having the same electromagnetic shield performance as that of the electromagnetic shield layer 10 as a main body, and the conductor wire penetration provided on the plate 41. And a through hole 42 for. As shown in FIG. 7B, a conductive member 43 is stretched over the opening of the through hole 42. The conductive member 43 matches the frequency of the electromagnetic wave to be shielded,
A conductive net such as a metal net may be stretched, a conductive fiber such as a metal fiber may be stretched, or a conductive cloth may be stretched. It is also conceivable that the gasket is used.

As described above, the conductive member 43 is connected to the through hole 42.
When the conductor wire 20 is passed through the through hole 42, the conductive member 43 must necessarily be stretched so as to contact the outer shield layer 25 of the conductor wire 20. For example, in the case of forming a net shape, the size of the mesh is formed to be slightly smaller than the expected cross-sectional diameter of the conductor wire 20, and when the conductor wire 20 is inserted, the mesh is expanded while being spread. Set it so that it must pass. Furthermore, if the mesh size is larger than the mesh size, it may be set so that the mesh part must be broken and passed through.

The penetration processing member 40 having such a structure is shown in FIG.
As shown in the cross-sectional view of (C), the plate 41 is provided so as to close the opening 10 a provided in the electromagnetic shield layer 10.
The conductor wire 20 is drawn in through the through hole 42 provided in the. In the case shown in FIG. 8 (A), the conductor wire 20 is inevitably pulled through by passing through the mesh of the conductive member 43 provided in the through-hole 42 in a fixed lattice pattern, so that the conductor wire 20 is inevitably drawn. The outer shield layer 25 is brought into contact with the conductive member 43 to secure electrical connection.

In the case shown in FIG. 8B, the conductive member 4
3 is a conductive fiber stretched in an irregular shape at the opening of the through hole 42, and the conductor wire 20 is passed through so as to break the irregular net portion. In this way, electrical connection may be ensured.

Further, as shown in FIG. 8C, the through hole 42 may be provided with a lid 44 formed of a material having an electromagnetic shield performance. When the conductor wire 20 is not pulled through the through hole 42, the lid 43 may be provided in the through hole 42 so as to be closed so that the electromagnetic shield property can be secured. As a method of attaching the lid 43, for example, as shown in FIG. 8 (C), a configuration that can be easily screwed in with a Phillips screwdriver may be adopted.

In the above description, the penetration processing member 40 is used so that the electrical connection between the outer shield layer 25 and the electromagnetic shield layer 10 can be easily secured without any trouble. However, such electrical connection is
The penetration processing member 40 may not be used.

FIG. 9 is an explanatory view showing a situation in which the conductor wire 20 provided with the external shield layer 25 described above is passed through the electromagnetic shield layer 10 without using the penetration processing member 40. The outer shield layer 25 is formed on the electromagnetic shield layer 10,
It is passed through a through hole that opens according to the diameter of the conductor wire 20,
The outer shield layer 25 is electrically connected to the electromagnetic shield layer 10.

Further, in the case shown in FIG. 7 (C), the penetration processing member 40 has its plate 41 mounted on the electromagnetic shield layer 10.
Although the structure is provided on the electromagnetic shield layer 10 so as to straddle the opening 10a, the plate 41 may be fitted into the opening 10a. For example, plate 4
1 may be configured in a circular shape, and the opening 10a provided in the electromagnetic shield layer 10 may also be configured in a circular shape so that the both can be fitted in a screwed manner.

Further, in the above description, the penetration processing member 4
Although the case where 0 is configured separately from the electromagnetic shield layer 10 has been described, the through hole 12 provided in the electromagnetic shield layer 10 from the beginning is described.
The penetrating member 43 may be stretched on the opening surface of the same as in the above description.

Further, although the case where the main body of the penetration processing member 40 is constituted by the plate 41 has been described, other shapes may be used.

The conductive member 43 of the penetration processing member 40 may be detachably replaceable in the through hole 42. The attachment / detachment structure may be a conventionally used structure such as a screw-in type.

(Embodiment 4) This embodiment proposes a structure which can be applied to the penetrating portion processing structure shown in the above-mentioned Embodiments 1 to 3 to further enhance its electromagnetic shield performance. . Conventionally, the conductor wire drawn into the electronic shielded space has been treated so as to draw in the required number of devices and the like used in the electromagnetic shielded space.

In such a treatment method, as schematically shown in FIG. 10, since the number of conductor wires 11 corresponding to the equipment used in the electromagnetic shield space 13b passes through the electromagnetic shield layer 10, the electromagnetic shield is accordingly increased. It can be said that destruction is likely to occur.

Therefore, the present inventor, as shown in FIG. 11, reduces the number of conductor wires drawn into the electromagnetic shield space from the outside and secures the number of conductor wires required in the electromagnetic shield space. Therefore, it was found that the method of branching the lead-in conductor wire in the electromagnetic shield space is effective.

As shown in FIG. 11, the conductor wire 11 passes through the through hole 12 of the electromagnetic shield layer 10 and the electromagnetic shield space 1 is formed.
It is pulled into 3b. Conducted conductor wire 11
Is a distribution board 50 provided in the electromagnetic shield space 13b.
And is branched to each device in the electromagnetic shield space 13b.

As described above, by providing the distribution board 50 or the like on the conductor wire 11 in the electromagnetic shield space 13b, branching is performed in the electromagnetic shield space 13b, and the penetration conductor wire in the penetrating portion of the electromagnetic shield layer 10 is formed. The number can be reduced. In addition to the distribution board 50, for example, branching means such as a terminal board may be used.

Comparing FIGS. 10 and 11, in FIG. 11 to which the present invention is applied, the number of conductor wires 11 penetrating the electromagnetic shield layer 10 is set to, for example, one, and the electromagnetic shield space 13b is formed.
It is divided into 5 branches. However, in the method of the conventional configuration, the five conductor wires 11 are connected to the electromagnetic shield layer 10 from the beginning.
It is considered that the electromagnetic shield property in the through portion is more likely to be deteriorated than in the case shown in FIG.

[0077]

According to the present invention, it is possible to secure the electromagnetic shield performance in the penetrating portion through which the conductor wire passes through the electromagnetic shield layer.

In the penetration processing member of the present invention, since a conductive member is provided in the through hole and the conductor wire is passed through, the outer shield layer of the conductor wire and the conductive member can be brought into contact with each other. As compared with the conventional configuration in which the outer shield layer and the electromagnetic shield layer are electrically connected with a metal wire or the like each time, the construction becomes easier and the construction time can be shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an electromagnetic shield function of a waveguide.

FIG. 2 is an explanatory diagram showing an operation of the coaxial tube as an electromagnetic wave transmission path.

FIG. 3 is an explanatory view showing an electromagnetic wave transmission action by passing a conductor wire through a through hole provided in an electromagnetic shield material.

FIG. 4A is a schematic view showing a state in which a conductor wire is penetrated through the electromagnetic shield layer according to the embodiment of the present invention,
FIG. 6B is a perspective view of a principal part partially showing a state in which an insulating magnetic body is provided on a conductor wire.

5A is a partial perspective view showing a cross-sectional structure of a conductor wire according to the present invention having an outer shield layer, and FIG. 5B is a cross-sectional structure of a conductor wire having a conventional structure without an outer shield layer. It is a partial perspective view showing.

6A is a sectional perspective view of a power supply line according to the present invention in which an external shield layer is provided, and FIG. 6B is a sectional perspective view of a power supply line having a conventional configuration.

FIG. 7A is a front view showing a usage state of the penetration processing member of the present invention, and FIG. 7B is a partial front view showing a situation in which a conductive member is provided in a through hole of the penetration processing member; (C) is a side sectional view of (A).

8A and 8B are explanatory views showing a situation in which a conductor wire is passed through a penetration processing member, and FIG. 8C is a front view showing a lid for a through hole of the penetration processing member.

FIG. 9 is a perspective view showing a situation in which a conductor wire having an outer shield layer is passed through a through hole of an electromagnetic shield layer without using a penetration processing member.

FIG. 10 is an explanatory view schematically showing a conventional drawing state of an electromagnetic shield layer of a conductor wire.

FIG. 11 is an explanatory view schematically showing the drawing-in state of the electromagnetic shield layer of the conductor wire according to the present invention.

[Explanation of symbols]

1 Waveguide 2 conductor wire 3 Electromagnetic shield material 4 through holes 10 Electromagnetic shield layer 10a opening 11 conductor wire 12 through holes 13a Non-electromagnetic shielded space 13b Electromagnetic shield space 14 Insulating magnetic material 20 conductor wire 21 core wire 22 Dielectric layer 23 Inner shield layer 24 Cover 25 External shield layer 31a core wire 31b core wire 32 insulating layer 33 Protective layer 34 External shield layer 35a core wire 35b core wire 40 Penetration processing member 41 plates 42 through hole 43 Conductive member 44 Lid D pipe width D1 width L length L1 length P1 mounting pitch

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000195971             Nishimatsu Construction Co., Ltd.             1-20-10 Toranomon, Minato-ku, Tokyo (71) Applicant 000140982             Mamagumi Co., Ltd.             2-5-8 Kita-Aoyama, Minato-ku, Tokyo (71) Applicant 302060926             Fujita Co., Ltd.             4-25-2 Sendagaya, Shibuya-ku, Tokyo (71) Applicant 000201478             Maeda Construction Industry Co., Ltd.             2-10-26 Fujimi, Chiyoda-ku, Tokyo (72) Inventor Tetsuo Endo             No. 2 Tsukutocho, Shinjuku-ku, Tokyo Co., Ltd.             Kumagai Gumi Tokyo Head Office (72) Inventor Susumu Shimizu             47-3 Mita, Atsugi-shi, Kanagawa Sato Industrial Co., Ltd.             Company Central Technology Research Institute (72) Inventor Yuu Miura             Toda Ken 1-7-1 Kyobashi, Chuo-ku, Tokyo             Inside the corporation (72) Inventor Kaoru Murakami             Nishimatsuken 1-20-10 Toranomon, Minato-ku, Tokyo             Inside the corporation (72) Inventor Koichi Okuno             Stock Market Association, 2-5-8 Kita-Aoyama, Minato-ku, Tokyo             Within the company group (72) Inventor Yoichi Katsumata             4-25-2 Sendagaya, Shibuya-ku, Tokyo Stock             In ceremony company Fujita (72) Inventor Satoshi Matsuo             2-10-26 Fujimi, Chiyoda-ku, Tokyo             Within Ta Construction Industry Co., Ltd. F term (reference) 5E321 AA42 BB21 GG05 GG09

Claims (11)

[Claims] 1. A penetration portion processing structure for an electromagnetic shield layer, wherein a penetration portion of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space is penetrated by a conductor wire such as an electric wire, and the penetration portion is penetrated. A penetrating portion treatment structure for an electromagnetic shield layer, wherein an insulating magnetic material is provided on an outer periphery of an insulating portion of the conductor wire on a side of the conductor wire extending to the non-electromagnetic shield space. 2. A penetrating portion treatment structure for an electromagnetic shield layer, wherein a penetrating portion of the electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space is penetrated by a conductor wire having a covering portion such as an electric wire. An external shield layer is provided on the conductor wire outside the covering portion, and the external shield layer and the penetrating portion are electrically connected via a conducting means. Penetration processing structure. 3. The penetrating portion treatment structure for an electromagnetic shield layer according to claim 2, wherein the conductor wire is a coaxial cable, and the conductor wire is provided inside the shield portion via the sheath portion. On the other hand, the penetrating portion processing structure of the electromagnetic shield layer, wherein the outer shield layer is provided in an insulated manner. 4. The penetrating portion treatment structure for an electromagnetic shield layer according to claim 2, wherein the conducting means penetrates the conductor wire through a conductive member provided in an opening of the penetrating portion of the electromagnetic shield layer. By doing so, it is a means for bringing the outer shield layer of the conductor wire into contact with the conductive member. 5. A penetrating portion treatment structure for an electromagnetic shield layer, wherein a penetrating portion of the electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space is penetrated by a conductor wire such as an electric wire, wherein the conductor wire is In the electromagnetic shielded space, the distribution board and / or the terminal board are unfolded and branched, and the penetrating portion processing structure of the electromagnetic shield layer. 6. The electromagnetic shield layer penetrating portion treatment structure according to claim 5, wherein the conductor wire is the electromagnetic shield layer according to any one of claims 1 to 4 at a penetrating portion of the electromagnetic shield layer. A penetration processing structure for an electromagnetic shield layer, wherein a penetration processing structure is applied. 7. A penetration processing member for electrically connecting a conductor wire such as an electric wire penetrating a penetrating portion of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space to the electromagnetic shield layer. A main body provided in the opening of the electromagnetic shield layer, a through opening provided in the main body for penetrating the conductor wire, and a conductor wire provided in the penetrating opening for penetrating the conductor wire. And a conductive member that is in contact with the through member. 8. The penetration processing member according to claim 7, wherein the conductive member is formed in a mesh shape and is stretched over the penetration opening. 9. A conductor wire having a coating part such as an electric wire penetrating a penetrating part of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space, wherein an outer shield layer is provided outside the covering part. A conductor wire characterized by being provided with. 10. The conductor wire according to claim 9, wherein the conductor wire is a coaxial cable, and the outer shield is provided with respect to the inner shield layer provided inside the covering portion via the covering portion. A conductor wire in which layers are provided in an insulated manner. 11. The conductor wire according to claim 9, wherein when the conductor wire is penetrated through a penetrating portion of an electromagnetic shield layer that defines an electromagnetic shield space and a non-electromagnetic shield space, the non-electromagnetic wire of the conductor wire is used. A conductor wire, wherein an insulating magnetic material is provided on the outer periphery of the outer shield layer on the side exposed in the shield space.