JP2003060385A - Sheet for electromagnetic wave shield and electromagnetic shield installing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the work cost of an electromagnetic wave shield structure and to prolong the service life of this structure. SOLUTION: A pair of protective sheets 2 are laminated on a fibrous a conductive resin-made conductive sheet 3, so that the sheet 3 is sandwiched in between the pair of protective sheets 2; the laminate of them is constituted to be cut by a cutter 4.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electromagnetic wave shield sheet and an electromagnetic wave shield construction method.

[0002]

2. Description of the Related Art In recent years, in order to protect electronic equipment from electromagnetic interference, for example, an entire building or room has been shielded by an electromagnetic wave.

Conventionally, the electromagnetic wave shield construction method is as follows.
There was a means of laying metal foil on the floor, walls, ceiling, etc. of the building and covering the entire building or room with the metal foil.

In other words, there has been a method in which a plurality of metal foils are laid side by side in a direction along the surface to be laid on the laying target portion of the metal foil, and the ends of the adjacent metal foils are welded to each other.

[0005]

However, since the above-mentioned conventional method requires a special technique of welding metal foils to each other, the number of workers who can perform the work is limited, and the construction cost becomes high. There is a problem that the metal foil is corroded and the life is shortened.

An object of the present invention is to reduce the construction cost and extend the life of the electromagnetic wave shield structure.

[0007]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] The pair of protective sheet materials and the conductive sheet material are placed in a state where a fibrous conductive sheet material or a conductive sheet material made of a conductive resin is sandwiched between the pair of protective sheet materials. It is configured to be laminated and cuttable with a cutting tool.

[Operation] Since the electromagnetic wave shielding sheet is constructed as described above, in order to cover the whole building or room with this electromagnetic wave shielding sheet, for example, a plurality of electromagnetic wave shielding sheets are used. Laying on the laying target part of the sheet for a line in the direction along the laying target surface,
Before or after laying the electromagnetic wave shielding sheet on the laying target portion, the end of the electromagnetic wave shielding sheet is cut so that the conductive sheet material is exposed, and the exposed conductive sheet of the adjacent electromagnetic wave shielding sheet is exposed. The ends of the adjacent conductive sheet materials can be connected to each other in a state where the conductive sheet materials are in contact with each other.

The end portions of adjacent electromagnetic wave shielding sheets can be connected to each other with, for example, an adhesive tape or an adhesive. As a result, a special technique of welding is not required for connection, it is possible to avoid limiting the number of workers who can be installed, and the work can be simplified.

Both sides of the conductive sheet material can be protected by a pair of protective sheet materials, and deterioration or damage of the conductive sheet material can be suppressed.

[Effect] Therefore, the construction cost can be reduced and the life of the electromagnetic wave shield structure can be extended.

The structure, action and effect of the invention according to claim 2 are as follows.

[Structure] In the structure of the invention according to claim 1, the protective sheet material is a rubber-like elastic body.

[Operation] In addition to the same operation as the operation according to the first aspect, the protective sheet material is a rubber-like elastic body, so that an external force is absorbed to damage the conductive sheet material. It can be effectively prevented.

In addition, it becomes easier to absorb the unevenness, and
It becomes easy to deform according to the shape of the laying target part.

[Effect] Therefore, in addition to the same effect as the effect according to the first aspect, the life of the electromagnetic wave shield structure can be extended.

Further, since it becomes easy to absorb the unevenness and easily deform it according to the shape of the laying target portion, the appearance of the electromagnetic wave shield structure can be improved.

The constitution, operation and effect of the invention according to claim 3 are as follows.

[Structure] In the structure of the present invention according to claim 1 or 2, the conductive sheet material is a non-woven fabric made of carbon fibers.

[Operation] In addition to the same operation as the operation of the first aspect, the following operation can be achieved.

For example, as shown in FIG. 2A, after cutting a long electromagnetic wave shielding sheet 1 into a plurality of electromagnetic wave shielding sheets 1 into a predetermined length by a cutter 4, 2 (b) and FIG. 2 (c), as shown in FIG. 2 (c), one portion of the protective sheet material having a predetermined length from the cut edge of the electromagnetic wave shielding sheet 1 and a part of the conductive sheet material 3 (half the thickness) When the conductive sheet material 3 is exposed by cutting the (portion), the conductive sheet material 3 is a non-woven fabric made of carbon fiber according to the configuration of claim 3, and therefore the conductive sheet material 3 is formed. Can be easily peeled off in the thickness direction (Fig. 2 (b)).
reference).

As a result, the adjacent electromagnetic wave shielding sheets are easily exposed over a wide range, and the exposed conductive sheet materials 3 can be more reliably brought into contact with each other.

[Effects] Therefore, it becomes easier to obtain the same effects as the effects according to the configuration of claim 1 or 2.

The structure, operation and effect of the invention according to claim 4 are as follows.

[Structure] In the structure of the present invention according to any one of claims 1, 2 and 3, when the pair of protective sheet members are laminated on the conductive sheet member, the pair of protective sheet members are electrically connected to each other. The protective sheet material is adhered to the conductive sheet material, and the adhesive force of the one protective sheet material to the conductive sheet material is weaker than the adhesive force of the other protective sheet material.

[Operation] In addition to the same operation as the operation according to any one of claims 1, 2 and 3, the following operation can be performed.

For example, as shown in FIG. 7, the adhesive force of one protective sheet material 2 to one sheet surface b of the conductive sheet material 3 is measured by the other protective sheet to the other sheet surface a of the conductive sheet material 3. It is assumed that the adhesive strength of the material 2 is weaker.

In this case, by cutting the one protective sheet material 2 side having a weaker adhesive force to the conductive sheet material, the protective sheet material portion having the predetermined length can be easily separated from the conductive sheet material 3. Become.

As a result, adjacent electromagnetic wave shielding sheets can be easily exposed over a wide range, and the exposed conductive sheet materials 3 can be more reliably brought into contact with each other.

[Effect] It is easy to obtain the same effect as the effect according to any one of claims 1, 2 and 3.

The structure, action and effect of the invention according to claim 5 are as follows.

[Structure] A plurality of electromagnetic wave shielding sheets having the structure according to any one of claims 1, 2, 3 and 4 is provided on a portion to be laid on the electromagnetic wave shielding sheet in a direction along the surface to be laid. Laying them side by side, before or after laying the electromagnetic wave shielding sheet on the laying target portion, cut the end portion of the electromagnetic wave shielding sheet so that the conductive sheet material is exposed, the adjacent electromagnetic wave shield The end portions of the adjacent conductive sheet materials are connected to each other in a state where the exposed conductive sheet materials of the sheet for use are in contact with each other.

[Operation] By performing the construction as described above, the same operation as the operation according to any one of claims 1, 2, 3 and 4 can be achieved.

[Effect] Therefore, the same effect as the effect by the configuration according to any one of claims 1, 2, 3 and 4 can be obtained.

[0036]

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

FIG. 1 shows an electromagnetic wave shield sheet 1 used in the electromagnetic wave shield construction method.

In the electromagnetic wave shielding sheet 1, a pair of protective sheet materials 2 and a fibrous conductive sheet material 3 are laminated with a pair of protective sheet materials 2 sandwiching the fibrous conductive sheet material 3. -It is configured by bonding.

The protective sheet material 2 is made of a rubber-like elastic material, the conductive sheet material 3 is made of a non-woven fabric made of carbon fiber, and can be cut at a construction site with a cutter as a cutting tool. is there.

The electromagnetic wave shield construction method is as follows.

1) The electromagnetic wave shielding sheet 1 wound in a roll having a width of 1 m and a length of 50 m is fed out, and as shown in FIG. 2 (a), a predetermined number of electromagnetic wave shielding sheets 1 are formed. Cut with a cutter 4 to length.

2) As shown in FIGS. 2 (b) and 2 (c), one protective sheet material portion having a predetermined length from the cut edge of the electromagnetic wave shielding sheet 1 and the conductive sheet material 3 A part (a half thickness part) is cut to expose the conductive sheet material 3.

3) A plurality of electromagnetic wave shielding sheets 1 are laid on a floor as a laying target portion in a direction along the floor surface (that is, a laying target surface).

4) In a state where the exposed conductive sheet materials 3 of the adjacent electromagnetic wave shielding sheets 1 are polymerized (see FIG. 2C), the adjacent electromagnetic wave shielding sheets 1
The ends of are connected to each other with an adhesive or an adhesive tape.

[Other Embodiments] The protective sheet material 2 may be made of an organic material such as a thermoplastic resin or a thermosetting resin, or an inorganic material such as concrete, gypsum or glass.

The conductive sheet material 3 may be a sheet of long and short fibrous chips or a conductive resin.

Further, the conductive sheet material 3 may be in the form of woven cloth, mesh, or paper.

As shown in FIGS. 3A and 3B, both protective sheet materials 2 of the electromagnetic wave shielding sheet 1 are simultaneously cut from above and below by a pair of cutters 4 to form the conductive sheet material 3. It may be exposed.

In order to expose the conductive sheet material 3, the electromagnetic wave shielding sheet 1 may be cut as follows.

1) As shown in FIG. 4, the protective sheet material 2 on one side, the conductive sheet material 3 and the protective sheet material 2 on the other side are cut so that the cut ends are stepwise.

2) As shown in FIG. 5, cutting is performed so that the cut end has an inclined surface.

3) As shown in FIG. 6, both protective sheet materials 2
One of the electromagnetic wave shielding sheets 1 is cut in a state where the conductive sheet material 3 is retracted inward in the longitudinal direction, and the conductive sheet material 3 is outwardly in the longitudinal direction with respect to both protective sheet materials 2.
The other electromagnetic wave shielding sheet 1 is cut into a state in which is projected.

4) As shown in FIG. 7, one side of the protective sheet material having a predetermined length is cut from the edge of the electromagnetic wave shielding sheet 1 to expose the conductive sheet material 3.

In this case, in order to stack the pair of protective sheet materials 2 on the conductive sheet material 3, the pair of protective sheet materials 2 are adhered to the conductive sheet material 3, and one sheet surface b of the conductive sheet material 3 is bonded. If the adhesive force of the one protective sheet material 2 to the sheet is made weaker than the adhesive force of the other protective sheet material 2 to the other sheet surface a of the conductive sheet material 3, the adhesive force to the conductive sheet material 3 becomes By cutting the weaker protective sheet material 2 side, the protective sheet material portion having the predetermined length can be easily peeled from the conductive sheet material 3.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electromagnetic wave shielding sheet.

FIG. 2 is a diagram showing an electromagnetic wave shield construction method.

FIG. 3 is a diagram showing another embodiment.

FIG. 4 is a diagram showing another embodiment.

FIG. 5 is a diagram showing another embodiment.

FIG. 6 is a diagram showing another embodiment.

FIG. 7 is a diagram showing another embodiment.

[Explanation of symbols]

1 Electromagnetic shielding sheet 2 Protective sheet material 3 Conductive sheet material 4 cutting tools

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumio Watanabe             1-17-18 Edobori, Nishi-ku, Osaka City, Osaka Prefecture             Toyo Tire & Rubber Co., Ltd. (72) Inventor Kiyomitsu Hasegawa             No. 2 Tsukutocho, Shinjuku-ku, Tokyo Co., Ltd.             Kumagai Gumi Tokyo Head Office (72) Inventor Hidenaka Nonaka             No. 2 Tsukutocho, Shinjuku-ku, Tokyo Co., Ltd.             Kumagai Gumi Tokyo Head Office F-term (reference) 5E321 AA21 AA44 BB21 BB44 CC16                       GG05

Claims (5)

[Claims] 1. A pair of protective sheet materials and a conductive sheet material are laminated in a state where a fibrous conductive sheet material or a conductive sheet material made of a conductive resin is sandwiched between a pair of protective sheet materials. A sheet for electromagnetic wave shielding that can be cut with a cutting tool. 2. The electromagnetic wave shielding sheet according to claim 1, wherein the protective sheet material is a rubber-like elastic body. 3. The electromagnetic wave shielding sheet according to claim 1, wherein the conductive sheet material is a non-woven fabric made of carbon fiber. 4. A method of laminating the pair of protective sheet materials to the conductive sheet material, bonding the pair of protective sheet materials to the conductive sheet material, and applying one protective sheet material to the conductive sheet material. The electromagnetic wave shielding sheet according to claim 1, wherein the adhesive force is weaker than the adhesive force of the other protective sheet material. 5. A plurality of electromagnetic wave shielding sheets having any one of the constitutions 1, 2, 3 and 4 are arranged in a laying target portion of the electromagnetic wave shielding sheet in a direction along the laying target surface. Laying, before laying the electromagnetic wave shielding sheet on the laying target portion, or after laying, cut the end portion of the electromagnetic wave shielding sheet so that the conductive sheet material is exposed, and for the adjacent electromagnetic wave shielding An electromagnetic wave shield construction method for connecting end portions of adjacent conductive sheet materials in a state where the exposed conductive sheet materials of the sheet are in contact with each other.