JPS63254798A - Electromagnetic shielding tape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electromagnetic shielding tape used mainly for long objects such as electric wires or conduit tubes.

BACKGROUND ART Conventionally, in order to shield a high frequency coil, a thin aluminum plate was formed into a cylindrical shape to cover the coil as an electromagnetic shield. *It is well known that thick lead plates are used to shield harmful radio waves from the point where X-ray rays are generated. Furthermore, in order to protect underground cables and the like from underground electromagnetic fields, they are placed in shielded pipes.

In recent years, the problem of shielding has come into focus as people have begun to relocate overhead power lines by placing them in underground utility ditches. In other words, the frequency, power, time, etc. handled by electric fields have become on an incomparably larger scale than in the past.

Among these, for example, electronic light electrical equipment, medical/physical equipment,
There have been an increasing number of cases in which electromagnetic waves are emitted into the air from devices that handle electromagnetic waves, such as cooking appliances, or are transmitted through power supply circuit wires and affect other devices.

However, no measures have been established to completely prevent these harmful effects.At most, measures have been taken such as locally shielding the oscillating part of equipment that emits electromagnetic waves, or covering the inside of the equipment with a shield plate. It's nothing more than that. Moreover, the power of the electromagnetic waves handled by these devices continues to increase, and with the above-mentioned glue application measures, the harmful effects of electromagnetic waves only increase.

Due to the above-mentioned circumstances, it is urgent to prevent electromagnetic waves generated inside devices from being emitted to the outside, and to prevent electromagnetic interference from the outside.

In view of these circumstances, the present invention is an electromagnetic shielding material that mainly protects long objects such as electric wires from interference from electromagnetic waves from inside and outside.

Therefore, when installing electromagnetic shielding materials inside and outside of the above-mentioned equipment, a plastic insulating layer is heat-sealed to one or both sides of the electromagnetic shielding plate made of non-ferrous metal, so that it is difficult to peel off and the surface of the shielding plate is It took a lot of effort to expose the material, and if you were not skilled, there was a risk of tearing or damaging the surface, making it difficult to work with.

<Problems to be Solved by the Invention> However, as described above, the shield plate provided at a location away from the electromagnetic wave generation location is effective in a specific frequency range, but has the disadvantage that it is not effective in all frequencies.

The present invention aims to solve such problems and is an electromagnetic shielding material that is easy to use at construction sites and effective over a wide range of frequencies.

In view of these points, the present invention proposes an electromagnetic shielding tape that has a simple structure, is inexpensive to manufacture, and has an excellent electromagnetic shielding effect.

Means for Solving the Problems> The structure of the present invention for achieving this object will be explained using FIGS. 1 to 6 corresponding to the embodiments. ) is formed into a tape shape.
The electromagnetic shielding tape covered with the film (2) has a structure in which the insulating film (2) is attached in such a way that it can be partially peeled off.

Since the present invention has such a structure, when winding it around a bundle of electric wires, the protective insulating film attached to the outer surface of the electromagnetic shielding plate can be peeled off along the cuts or threads. Then, the shield plate surface is exposed very easily, so that it can be easily and reliably bonded to the adjacent tape.

Embodiments> Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is an external view showing the structure of the electromagnetic shielding material of the present invention;
Figure 2 is a cross-section of the same cut, and Figure 3 is a cross-section of another embodiment. (1) is mainly a shielding tape made of a tape-shaped thin plate of non-magnetic metal such as lead, brass, stainless steel, or aluminum. Yes, (2) is an insulating film that covers the surface of the main shield tape (1), which also serves as a protective coating, and is made of polyester, A
A plastic material such as BS or paper is used.

Then, in order to make it easier to partially peel off the pasted parts, make cuts (3) such as perforations on the center line (7) of the tape or at certain places, or use split thread (4).
It is enclosed. Then, the back side is covered with adhesive material (5
), which prevents the edges from unraveling when stored in a spiral shape.

When using such an electromagnetic shielding tape (10), as shown in Fig. 4, for example, the insulating film ( 2
) from which the electromagnetic shielding tape (10) has been peeled off is placed on the adhesive side (5).
) side down and wrap it around. At this time, when the surface (8) from which the insulating film (2) has been peeled off is brought into close contact with the back surface of the adjacent wound tape (10'), the entire wound tape becomes a shield tube with no gaps.

And with Den#i (6)! It adheres strongly and does not peel off easily. If a conductive adhesive material is used for the adhesive surface (5), the shielding resistance will be reduced and the effect will be enhanced.

Further, not only the straight portions of the electric wire (6) but also the curved portions have the edges of adjacent tapes overlapping each other, so that the shield can be tightly wound without leaking.

Since the bundle of electric wires (6) is thus tightened from the outside with the electromagnetic shielding tape (10), the electric wires (6) can be firmly held.

In addition, as shown in Fig. 5, a synthetic resin electric wire W (12
) by wrapping the shielding tape (10) of the present invention around the outer circumference of the tube, it becomes a shield tube, shielding the electromagnetic waves emitted from the electric wire (6) held inside and preventing it from radiating to the outside, and conversely preventing electromagnetic waves from outside. prevent damage caused by In another embodiment shown in FIG. 6, a step is provided on the outer edge of the main body (1), and a splitting thread (4) is enclosed or a cut is made along the step so that the insulating film (2) can be easily peeled off. <3), the tape overlaps closely with the adjacent tape and there is no leakage.

Furthermore, the present shielding tape (10) is used for building fittings such as intelligent houses, which have been attracting attention in recent years, where the entire building is shielded to prevent unnecessary radiated electromagnetic waves from being emitted outside the building. ! ! l! It is used for shield processing of building materials such as, caulking of lff1WI, etc.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structure of these embodiments. It can be implemented with appropriate modification within the scope of achieving the following effects.

<Effects of the Invention> As is already clear from the above description, when the tape is spirally wound around an electric wire, etc., the adhesive surface on the back of the tape allows it to adhere tightly to the outer surface of the electric wire, etc., and the insulator can be cut away from the cut. By pulling the splitting thread, the bare surface of the tape can be exposed, and it can be tightly attached to the bare surface of the adjacent tape, resulting in a shielded tube with low ground resistance and high shielding effect with no leakage gaps, completed with simple operation. do.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, FIG. 1 is an external view showing the structure of the electromagnetic shielding material of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. The figure shows a cross section of another embodiment, and Figure 4 is a diagram in which the product of the present invention is wound directly on the east side of the electric wire. Figure 5 is a diagram showing the product of the present invention wound around the outer periphery of a pipe containing an electric wire, and Figure 6 is a diagram showing the structure of yet another embodiment. In the figure, (1) is a tape body made of non-magnetic metal, and (2) is an insulating film.

Claims (4)

[Claims] (1) An electromagnetic shielding tape in which the surface of a non-magnetic metal (1) formed into a tape shape is covered with an insulating film (2), and the insulating film (2) is attached so as to be partially peelable. (2) The electromagnetic shielding tape according to claim 1, wherein the insulating film (2) encapsulates a splitting thread (4). (3) The electromagnetic shielding tape according to claim 1, wherein the insulating film (2) has a peeling cut (3). (4) The electromagnetic shielding tape according to claim 1, wherein the edge of the main body (1) of the electromagnetic shielding tape is stepped.