JPH01233798A - Electromagnetic shielding material and panel - Google Patents

Abstract

PURPOSE:To provide an electromagnetic shielding plane with an arbitrary area quickly by a method wherein conductive net member is solidly hardened synthetic resin while its circumferential parts are made to protrude outward and an excellent electromagnetic shielding function is maintained even at the linking part. CONSTITUTION:A metal net 4, which is a conductive net member, is hardened solidly with synthetic resin 21 while its circumferential free ends are made to protrude to form an electromagnetic shielding material 2. It can be freely determined in accordance with the application that which side of the panel the net 4 protrudes from but, to provide versatility, it is recommended to make the net 4 protrude from all the sides. The net 4 protruding from the side of the panel 11 is bent and connected to the side surface of a pillar 10 mechanically and electrically. With this constitution, electromagnetic shielding of the linking parts of a plurality of the panels can be realized and an electromagnetic shielding plane with an arbitrary area can be provided quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electromagnetic shielding material and an electromagnetic shielding panel that has an added electromagnetic shielding effect by using the same as a surface member.

[Prior Art] Conventionally, prefabricated partition wall panels have been used to partition office spaces. This wall panel for partitioning is a panel with a fixed area, and when partitioning a wide area, a plurality of panels are connected using channel materials such as aluminum as pillars.

[Problems to be Solved by the Invention] Incidentally, in recent years, malfunctions caused by external noise signals have become a problem in office computer equipment, its peripheral equipment, and computer-controlled factory automation equipment, which are rapidly becoming popular. Regarding these devices themselves, EMI (Electro-Ma
gnetic interference) regulations, and are required not to emit unnecessary electromagnetic waves to the outside. However, electromagnetic wave power coming from outside the equipment, such as radar waves from monitoring/controllers, radar waves from ship radars, electrical discharge noise from electric discharge machines, pantograph/spark noise from overhead wires, high-frequency heating, and leakage waves from processing machines. It has been difficult to prevent malfunctions caused by such factors in terms of cost. In order to protect equipment such as office computers from electromagnetic waves that unexpectedly arrive from the outside and prevent malfunctions, it is necessary to create an electromagnetic shielding space of any size within a building or factory, and also during assembly and disassembly. It needs to be easy and economically cheap.

However, the above-mentioned conventional wall panels for partitions were originally designed for the sole purpose of partitioning a space.
It was never used for the purpose of shielding electromagnetic waves, and therefore its electromagnetic shielding function was incomplete. In addition, these partition wall panels that use metal plates such as steel have an additional shielding function, but one surface is painted to avoid burning, and care is taken to maintain electrical contact at the connecting parts. Therefore, good electromagnetic shielding could not be achieved at the joints between the panels.

On the other hand, the existence of so-called shield rooms, which are based on a construction method similar to prefabricated construction, has been well known, but they aim to ensure complete electrical contact at the joints between wall panels and achieve electromagnetic shielding performance of 50%.
dB or higher, the construction cost and the manufacturing cost of each component are high, and furthermore, it is not designed to create an electromagnetic shielding space of any size.

Therefore, the present invention solves the above problems and aims to prevent malfunctions of office computer equipment and factory automation equipment due to external electromagnetic wave power, or to shield leakage electromagnetic wave power of high frequency heating, processing machines, and electrical discharge machines. It is an object of the present invention to provide an electromagnetic shielding material and a panel suitable for creating an electromagnetic shielding space of any size and economically at low cost.

[Means for Solving the Problems] In order to achieve the above object, the electromagnetic shielding material of the present invention has a conductive net-like member protruding outward from the peripheral edge.
It is made by curing synthetic resin integrally with the above-mentioned net-like member.

Another electromagnetic shielding material of the present invention is made by curing a synthetic resin integrally with the conductive net member and the conductive net member protruding outward from the periphery, and has openings penetrating the front and back sides. and the mesh member is exposed from the opening.

The synthetic resin may be either one that exhibits rigidity after curing or one that exhibits flexibility after curing.

The electromagnetic shielding panel of the present invention includes an electromagnetic shielding material made of a synthetic resin that is cured integrally with the net-like member, and a plate-like member, with the conductive net-like member protruding outward from the peripheral edge. , characterized in that the electromagnetic shielding material is joined to the plate member as a surface member.

From its point of view, the present invention and the electromagnetic shielding panel have only one surface member.

From another point of view, the electromagnetic shielding panel of the present invention is a panel formed by sandwiching a plate member between two surface members,
At least one of the two surface members is an electromagnetic shielding material made by curing a synthetic resin integrally with the net-like member, with the conductive net-like member protruding outward from the periphery. Features.

Depending on the application, the plate-like member may have an opening penetrating the front and back sides, and the surface member may have an opening corresponding to the opening of the plate-like member, and the net-like member may be exposed from the opening. You can.

The electromagnetic shielding material used in the electromagnetic shielding panel is a plate formed by curing a synthetic resin that exhibits rigidity after curing, or a sheet formed by curing a synthetic resin that exhibits flexibility after curing.

Examples of synthetic resins that exhibit rigidity upon curing include epoxy resins and acrylic resins, and may also include synthetic rubber. Examples of synthetic resins that exhibit flexibility after curing include polyethylene, polyvinyl chloride, polyester, etc. It will be done.

In this specification, the term "plate" refers to a rigid plate (or thin plate) member. However, plates that can be elastically bent in response to external forces are included in the plate. Furthermore, the term "sheet" refers to a member that is flexible and can be bent or folded like paper, cloth, or the like.

A wire mesh is suitable as the conductive mesh member, but other materials may be used as long as they have appropriate elasticity and flexibility. For example, a carbon fiber woven fabric, a so-called punching metal in which a large number of holes are provided in a thin metal plate to make it flexible, etc. can also be used.

[Function] The present invention provides a plate-shaped or sheet-shaped electromagnetic shielding material that can maintain a good electromagnetic shielding function even at the connecting portion when interconnected. . A conductive mesh member such as a wire mesh has the effect of blocking electromagnetic waves (the smaller the mesh is, the more high-frequency radio waves can be blocked), and has appropriate elasticity and flexibility. It is possible to maintain good mutual contact. This electromagnetic shielding material can be used as an independent member to partition a space, or can be attached to an existing wall or panel.

In this case, the conductive net members protruding from opposite sides of the electromagnetic shielding material are overlapped or intertwined to electrically and mechanically connect them at the connecting portion. As a result, an electromagnetic shielding surface of any area can be created simply, quickly, and at low cost.

From another perspective, the electromagnetic shielding material of the present invention can be seen as a combination of a surface member as a component of a conventional partition wall panel and a conductive net member for electromagnetic shielding. That is, the present invention also provides an electromagnetic shielding panel that can easily maintain electrical contact during connection and assembly. The use of panels is not limited to wall materials, but can also be used as ceiling materials.

Further, since the electromagnetic shielding panel according to the present invention has a conductive mesh member pre-assembled in one surface member, the structure is simple and inexpensive, and the panels can be connected to each other very easily during construction. Therefore, if a shield room is created using this, a shielded space of a desired size can be provided inexpensively and easily. If the direction of arrival of the noise radio waves is known, it is not necessarily necessary to construct a shielded room.

Even if the panel is erected only in the direction of arrival, a certain degree of effect can be obtained.

Although the electromagnetic shielding power of the shielded room using the electromagnetic shielding material or panel of the present invention is not as good as that of conventional expensive shielded rooms, it is especially effective for office computers and their peripheral equipment, which have become rapidly popular in recent years. It is sufficient to prevent malfunctions caused by external noise in factory automation equipment, and is superior to conventional shielded rooms in terms of economy, flexibility, ease of assembly and disassembly, etc.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<First Example of Electromagnetic Shielding Material> FIGS. 1(a) and 1(b) are a side view and a plan view of a part of an electromagnetic shielding material 2 according to the present invention.

This electromagnetic shielding material 2 consists of a wire mesh 4 serving as a conductive mesh member, with its peripheral free end protruding, and a synthetic resin 2
1. It is up to you which side of the panel the wire mesh 4 should protrude from depending on its purpose, but in order to provide versatility, it is desirable to have it protrude from all sides (4 sides), and the length of the protrusion should be as follows:
It can be freely selected depending on the mode of use. Although various wire diameters and mesh sizes can be used for the wire mesh, the wire diameter of the wire mesh 4 used in this example is approximately 0.1 Sam, and the line spacing between the wire meshes is approximately 1.5 av.

By using a synthetic resin 21 that exhibits rigidity or flexibility after curing, and by selecting an appropriate thickness, this electromagnetic shielding material can be formed into an electromagnetic shielding plate or an electromagnetic shielding sheet. It is possible to do this.

<First Embodiment of Electromagnetic Shielding Panel> FIGS. 2 and 3 are partially exploded perspective views of an embodiment of an electromagnetic shielding panel according to the present invention using the electromagnetic shielding material of FIG. 1, respectively.

As can be seen from FIG. 2, the panel of this embodiment has a core material 6, which is a plate-like member, between a veneer decorative board 8, which is one surface member, and an electromagnetic shielding material 2, which is the other surface member. to be placed.

The elements in FIG. 2 are bonded to each other by adhesive or the like.

The corner portions 5 of the wire mesh 4 in FIG. 1 are cut along the dotted lines 3 to facilitate bending of the free ends of each side of the wire mesh 4 after joining. Of course, if there is no problem, the corner 5 may be left as is.

Instead of using one wire mesh, two wire meshes may be used intersecting each other.

The core material 6 may include a vapor honeycomb 14 as shown in FIG. 9, a gypsum boat 12 as shown in FIG. 1O, and others.
Laminated plywood, asbestos, rubber, etc.

Various materials can be used.

- Figures 4(a) to 4(c) show various ways of bending the wire mesh 4 of the electromagnetic shielding panel l shown in Figure 2. These modes are merely examples and do not exclude other folding modes.

The electromagnetic shielding panel 11 in FIG. 3 is the same as the panel 1 in FIG. 2 except that a steel plate 18 is used as one surface member. The electromagnetic shielding function of this panel 11 is naturally higher than that of panel 1 in FIG.

<How to use electromagnetic shielding panel> Next, an example of use of the electromagnetic shielding panel of the present invention will be explained.

In the following explanation, panel 1.1 of FIG. 3 will be taken as an example, but the same applies to panel 1 of FIG. 2.

Figure 5 shows conductive pillars made of aluminum, steel, etc.
A state in which two panels 11 are connected to each other using channel material) 10 is shown. The wire mesh 4 protruding from the side of the panel 11 is bent and mechanically and electrically connected to the side of the support column 10. Because the wire mesh 4 has appropriate elasticity.

A good contact state is always maintained between the wire mesh 4 and the support column 10 without creating a gap.

This state of mutual connection of the panels allows for good electromagnetic shielding of the connecting portions of the plurality of panels. If the channel material used as the pillar 10 in FIG. 5 is used as a beam, the panel 11 can also be used as a ceiling material.

FIG. 6 shows a floor structure constructed using the same concept as the electromagnetic shielding panel of the present invention.

That is, the floor 30 is a flooring material 3 such as asbestos or laminated plywood.
Wire meshes 32 and 34 are incorporated in the floor material 36 so that one peripheral portion of the floor material 36 protrudes from the side of the floor material 36.

Floor 30 and electromagnetic shielding panel 1 according to the invention as shown in FIG.
1. Connections for the purpose of good electromagnetic shielding can be made by directly connecting both wire meshes at the lower end or side surface of the panel 11, as shown in FIGS. 7 and 8, respectively. In the example in Figure 7, panel 1 is
There is an advantage that the wire mesh of No. 1 and the wire mesh of the floor 30 can be connected.

In addition to the method of connecting the panels 11 to each other according to the present invention, there are various possible ways to connect the panels 10 to 10 shown in FIG. A conductive channel material 70 having an H-shaped cross section as shown in the figure may also be used. The wire meshes of both panels 11 are electrically and mechanically connected via a channel material 70 as shown by a hatched portion 72 . Alternatively, as shown in No. 1211, the wire meshes of both panels 11 may be brought into direct contact with each other at the side line portions 72, and the connectors 76 may be fixed by tightening them with well-known fixing means such as bolts and nuts at the dashed line 77, for example. Okay.

Even when two panels 11 are connected at right angles to each other, this can be done without using the channel material as described above.

For example, as shown in FIGS. 13 and 14, the two panels 11 are fixed at right angles to each other by conductive connectors 74 having an angular cross section (screws and the like are not shown). At this time, the wire mesh shown as the hatched part 72 is connected via the connector 74 or directly.
electrically connected.

Second Example of Electromagnetic Shielding Material> FIG. 15 is a partial perspective view of a second example of the electromagnetic shielding material according to the present invention.

The electromagnetic shielding material 2 of this embodiment is different from the electromagnetic shielding material 2 of FIG. It is exposed continuously over the entire surface. The opening 5 is provided for ventilation or light transmission. Also in the opening 5, since the wire mesh 4 is stretched over the entire surface, the electromagnetic shielding effect is maintained.

The electromagnetic shielding material 2 shown in FIG. 17 is a modification of the electromagnetic shielding material 2 shown in FIG. 15. This modification differs from the one shown in FIG. 15 in that the wire mesh 4 inside the opening 5 is present only at the peripheral edge of the opening, and the central part is missing. This opening 5 also acts as a hole for ventilation or light transmission, but since the entire surface of the opening 5 does not have the wire mesh 4, an electromagnetic shielding effect cannot be expected in the opening 5 alone. This electromagnetic shielding material 2 has meaning when used together with other members such as an electromagnetic shielding panel described later.

Second Example of Electromagnetic Shielding Panel> FIG. 16 is an exploded perspective view of a part of an electromagnetic shielding panel using the electromagnetic shielding material 2 of FIG. 15 as a surface member. 1st
Although the electromagnetic shielding material 2 in FIG. 7 is not shown, it can be configured in exactly the same way.

The electromagnetic shielding panel shown in FIG. 16 is formed by sandwiching a core material 6 between a pair of electromagnetic shielding materials 2. The core material 6 also has an opening 5' corresponding to the opening 5 of the electromagnetic shielding material 2, so that the panel as a whole has an opening for ventilation and light transmission.

<Application example of the second embodiment of electromagnetic shielding panel> First, the 16th embodiment
Application examples in which the electromagnetic shielding panel shown in the figure and the electromagnetic shielding panel using the electromagnetic shielding material 2 shown in FIG. 17 are used for a window film will be explained with reference to FIGS. 18A and 18B.

FIG. 18A shows an electromagnetic shielding window structure using a panel with wire mesh over the entire opening 5 as shown in FIG. 16, while FIG. 18B shows the center of the opening 5 as shown in FIG. This figure shows an electromagnetic shielding window structure using a panel using electromagnetic shielding material 2 without a wire mesh in the middle.

In Figure 18A, window member 56 is shown relative to the panel.

It is attached from both sides of the panel so as to close the opening 5, and is fixed by well-known fixing means. Here, bolts and nuts 54a, 54b are used as the fixing means. The window member 56 consists of one ordinary glass 52 and a glass frame 53.

In this example, the electromagnetic shielding function in the opening 5 is achieved by the wire mesh 4 covering the entire surface of the opening 5. The glass frame 53 may be conductive or non-conductive.

In FIG. 18B, similar to the example in FIG. 18A, a window member 57 is attached to the panel from both sides of the panel so as to close the opening 5, and is fixed by well-known fixing means. However, the window member 57 in this example is composed of a glass 58 in which a wire mesh similar to the wire mesh 4 is embedded, and conductive glass frames 59a and 59b that sandwich the glass 58. In this example, opening 5
The edge of the wire mesh 4 at the edge of the glass frame 5 is bent outward.
It is fixed in contact with 9b. At the same time 4. Glass frame 59a, 5
A conductive shield gasket material 60 is packed into the gap between the glass 9b and the peripheral edge of the glass 58. Therefore, good electromagnetic shielding is achieved also in the opening 5 and the edges of the opening.

Next, an application example in which the panels of each of the above embodiments are used for installing a duct will be described with reference to FIGS. 19A and 19B. The duct here is for the purpose of ventilation for cooling and heating, and is installed in a panel as a wall material or a ceiling material.

FIG. 19A shows an application example of a panel having a wire mesh over the entire opening 5 as shown in FIG. 16. The mounting portion 64 is fixed to the panel by means of fixing means (simply shown as a line 63 in FIG. 1). Since the opening 5 of the panel is entirely covered with wire mesh 4, it has a good ventilation function as well as a good electromagnetic shielding function.

19B shows an application example of a panel using the electromagnetic shielding material 2 without the wire mesh in the center of the opening 5 as shown in FIG. 17. In FIG. 9
A metal honeycomb 67 having a structure similar to that shown in the figure is attached in contact with the inner periphery of the duct. Tatami, metal honeycomb 6
It is desirable that each of the small openings 7 has the same size as the mesh of the wire mesh 4. In addition, with the side surface of the metal duct 66 in contact with the wire mesh 4 of the panel opening 5, the duct 66 and the panel are connected to each other via a fixture 65 by well-known fixing means (line 63 in the figure).
68). With this configuration, the opening 5 has a good electromagnetic shielding function as well as a ventilation function.

[Effects of the Invention] The electromagnetic shielding material according to the present invention is a plate-shaped or sheet-shaped electromagnetic shielding material in which a conductive net-like member is protruded from one peripheral edge. Good electromagnetic shielding function can be maintained even in Therefore, an electromagnetic shielding surface of any area can be easily, quickly, and inexpensively created. In addition, electromagnetic shielding panels using this electromagnetic shielding material as the surface member of the panel not only maintain good electromagnetic shielding function at mutually connected parts, but also have an extremely simple structure and are inexpensive. It becomes possible to provide

[Brief explanation of the drawing]

FIG. 1 is a side view and a plan view of a first embodiment of the electromagnetic shielding material according to the present invention, and FIGS. 2 and 3 are exploded perspective views of a part of an electromagnetic shielding panel using the electromagnetic shielding material of FIG. 1, respectively. Figure 4 is an explanatory diagram showing various aspects of bending the wire mesh of the electromagnetic shielding panel of Figure 2, Figure 5 is an explanatory diagram showing an example of interconnecting the electromagnetic shielding panels of the present invention, and Figure 6 7 is a partial perspective view showing a hanging floor structure used with the electromagnetic shielding panel of the present invention, and FIGS. 7 and 8 are explanatory views for explaining the connection structure between the electromagnetic shielding panel of the present invention and the floor of FIG. 6. , No. 9
10 and 10 are partial perspective views showing an example of the core material of the panel, FIGS. 13 and 14 are explanatory diagrams for explaining a connection structure for interconnecting electromagnetic shielding panels at right angles according to the present invention;
15 is a partial perspective view of a second embodiment of the electromagnetic shielding material of the present invention, FIG. 16 is an exploded perspective view of an electromagnetic shielding panel using the electromagnetic shielding material of FIG. 15 as a surface member, and FIG. 17 is a partial perspective view of a second embodiment of the electromagnetic shielding material of the present invention. 15
FIGS. 18A and 18B are partial perspective views showing modified examples of the electromagnetic shielding material shown in the figure, and FIGS. 19A and 19B are explanatory views showing application examples in which the electromagnetic shielding panel of the present invention is applied to window membranes, respectively. Each of the figures is an explanatory view showing an example of application of the electromagnetic shielding panel of the present invention for installing a duct. 1.11... Electromagnetic shielding panel 2... Electromagnetic shielding material 5... Opening 6... Core material 4... Wire mesh 21... Synthetic resin

Claims (8)

[Claims] (1) An electromagnetic shielding material made by curing a synthetic resin integrally with the conductive net-like member with the conductive net-like member protruding outward from the periphery. (2) A conductive net-like member is formed by curing synthetic resin integrally with the net-like member, with the conductive net-like member protruding outward from the peripheral edge, and has openings penetrating the front and back sides of the conductive net-like member, and the conductive net-like member protrudes outward from the peripheral edge. An electromagnetic shielding material characterized by having a net-like member exposed. (3) The electromagnetic shielding material according to claim 1 or 2, wherein the synthetic resin exhibits rigidity after curing. (4) The electromagnetic shielding material according to claim 1 or 2, wherein the synthetic resin exhibits flexibility after curing. (5) The electromagnetic shielding material is composed of an electromagnetic shielding material made by curing synthetic resin integrally with the netlike member and a plate-like member, with the conductive netlike member protruding outward from the peripheral edge. An electromagnetic shielding panel characterized in that it is bonded to the above-mentioned plate-like member as a surface member. (6) A state in which a panel is formed by sandwiching a plate-like member between two surface members, and at least one of the two surface members has a conductive net-like member protruding outward from the peripheral edge. An electromagnetic shielding panel characterized in that it is an electromagnetic shielding material made by curing synthetic resin integrally with the above-mentioned net-like member. (7) The electromagnetic shielding panel according to claim 5 or 6, wherein the electromagnetic shielding material is a plate formed by curing a synthetic resin that exhibits rigidity after curing. (8) The electromagnetic shielding panel according to claim 5 or 6, wherein the electromagnetic shielding material is a sheet formed by curing a synthetic resin that exhibits flexibility after curing.