JP2001295562A - Electromagnetic shielding shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic shielding shutter having such a good electromagnetic shielding capacity that the shutter can be installed of the opening of an electromagnetic shielding space. SOLUTION: A shutter curtain 3 is constituted by connecting a plurality of metallic slats 4 to each other in the vertical direction in an overlapping state, and in addition, installing a conductive braided wire 6 on the seat plate 5 at the lower end of the curtain 3. The shutter has a pressing device 8 provided with a plurality of pressing sections 8a which are arranged at desired intervals in the lengthwise direction of a guide rail 1 and protruded into a guide rail groove. At the time of closing the opening completely, the curtain 3 is connected to a building shielding layer by pressing the curtain 3 toward the internal wall of the guide rail 1 by means of the pressing device 8 and, thereafter, the braided wire 6 is also connected to the shielding layer through a receiving plate 9 provided on a floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electromagnetic shield.
The present invention relates to an electromagnetic shield shutter installed in an opening of a room or the like.

[0002]

2. Description of the Related Art In recent years, in buildings (for example, hotels and hospitals) where the proportion of work while moving is large, it is planned to use a cordless telephone for the extension of the building, to prevent interference from other areas. For the purpose, a basic level of electromagnetic shielding performance in a building is required. In addition, when performing various measurements and tests, an electromagnetic shield space may be required. When a large device or the like is carried into such a shield space, a predetermined large opening is required. To open and close such an opening, a shutter is used instead of a normal door or the like. Required.

[0003] However, if a general shutter is to be installed in the opening of the electromagnetic shield space as it is,
Electromagnetic waves leak from the gaps between the slats connected vertically and the left and right ends of the shutter curtain and the guide rail.
Electromagnetic waves leak from the gap between the shutters, electromagnetic waves leak from between the seat plate at the lower end of the shutter curtain and the floor, and electromagnetic waves leak from the gap between the shutter case that winds and stores the shutter curtain. There is a problem such as leakage.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and has been developed to provide an electromagnetic shield having good electromagnetic shield performance which can be installed in an opening of an electromagnetic shield space. It is an object of the present invention to provide a shield shutter.

[0005]

The technical means adopted by the present invention to achieve the above object is a shutter cover housed in a shutter case installed above an opening of an electromagnetic shield space. An electromagnetic shield shutter for fully closing the opening by the guide being lowered by being guided by guide rails erected on the left and right sides of the opening, wherein the shutter curtain is made of a plurality of metal members; The slats are formed by connecting the slats in an up-down direction, and the shutter
A conductive braided wire is provided on the seat plate at the lower end of the curtain,
The shutter has a pressing device which is disposed at a desired interval in the longitudinal direction of the guide rail and has a plurality of pressing portions projecting into the guide rail groove. When the shutter is closed, the right and left end portions of the shutter curtain are pressed toward the guide rail inner wall by a pressing device, so that the building sheet is closed.
And a braided wire provided on the seat plate is connected to the building shield layer via a receiving plate provided on the floor surface.

According to the present invention, the upper and lower slats are connected to each other by overwrapping.
Leakage of electromagnetic waves from gaps in the slat connection is prevented as much as possible. The overwrapping connection is a connection in which the connecting portions of the slats vertically adjacent to each other are curved in the same direction, and the connecting portions are locked to each other in a tightly overlapping manner. A connection with a large contact area between them.

When the opening is fully closed, the left and right ends of the shutter curtain facing the guide rail are pressed by the pressing device and connected to the building shield layer. Electromagnetic waves are prevented from leaking from the gap between the section and the guide rail as much as possible. Further, when the opening is fully closed, the conductive braided wire provided at the lower end of the shutter curtain is connected to the building shield layer, so that electromagnetic waves from between the lower end of the shutter curtain and the floor surface are not affected. Prevent leakage as much as possible.

[0008] The shutter case also includes a shutter
It is preferable that the joints between the plate members forming the case be welded at the joint surfaces. In addition, in the case of screwing or spot welding, the gap is made close to prevent leakage of electromagnetic waves as much as possible. Is preferred. Preferably, screwing and spot welding are performed at a pitch of 75 mm or less.

[0009]

Embodiments of the present invention will be described with reference to the drawings. In the embodiment, a double electromagnetic screen is used.
The use of a screen shutter allows the opening to have a double shield.
To form a metal structure. However, a series of shutters
However, by adopting the configuration according to the present invention, good test data that can withstand a desired electromagnetic shield can be obtained, and the electromagnetic shield shutter does not necessarily need to be double. Absent.

FIG. 1 is a schematic longitudinal sectional view showing a lintel portion of a shutter device, FIG. 2 (a) is a schematic plan view of an opening of a shield space, and FIG. 2 (b) is a shutter case. Front view, FIG. 2
(C) is a schematic longitudinal sectional view of the shutter case, in which a pair of left and right guide rails 1 are juxtaposed at predetermined intervals in the front-rear direction at the opening of the shield space. Above the opening, shutter cases 2 are arranged side by side at predetermined intervals in the front-rear direction.

Each of the shutter cases 2 is provided with a shutter curtain 3 wound therein, and both right and left ends of the shutter curtain 3 are guided by the guide rails 1. By descending, the opening is completely closed. As shown in FIG. 1, the shutter curtain 3 is constituted by connecting a plurality of metal slats 4 in an up-down manner in a vertical direction.
So that no gaps are created. A conductive braided wire 6 is sandwiched between the seat plate 5 at the lower end of the shutter curtain 3 and the braided wire 6 slightly protrudes below the lower end surface of the seat plate. The guide rails 1 and the slats 4 are plated with zinc to prevent a decrease in conductivity due to rust or the like.

The shutter case 2 is formed by screwing a plurality of plate members, and the pitch of the screw is 75.
mm or less to prevent electromagnetic waves from leaking from gaps between the plate members as much as possible. The shutter case 2 may be formed by welding a plate material, but in the case of spot welding, the pitch is desirably 75 mm or less.

The shape of the guide rail 1 is shown in FIGS. The guide rail 1 is opposed to the side wall 1
a, 1b and one end side is open, and the left and right ends (not shown in FIGS. 5 and 6) of the shutter curtain 3 are received in grooves between the side walls 1a, 1b. It has become. On one side wall 1a, an elongated metal flat bar 7 extending in the longitudinal direction is provided at a position facing the end of the shutter curtain 3.

The flat bar 7 is similarly arranged on each of the pair of guide rails 1 of the double shutter device. The guide rails 1 of each shutter device are respectively connected to different shield layers (independent primary and secondary layers) of the building, so that each flat bar 7 is connected via the guide rail 1 respectively. It is connected to the shield layer of the building. The flat bar 7 is made of stainless steel. On the other side wall 1b constituting the guide rail 1,
A plurality of receiving holes are provided at predetermined intervals in the vertical direction, and the pressing portion 8a of the pressing device 8 can freely move into and out of the groove of the guide rail 1.

FIG. 3 is a side view of the pressing device.
Is a partially enlarged view, and (b) is a schematic overall view. FIG.
FIG. 6 is a plan view showing the relationship between the guide rail located outside the shield space and the pressing device, and FIG. 6 is a plan view showing the relationship between the guide rail located inside the shield space and the pressing device. The pressing device 8 is configured by connecting a plurality of pressing portions 8a arranged at predetermined intervals in the vertical direction vertically, and a power cylinder 8b is connected to the lowest pressing portion. Each pressing portion 8 is driven by driving the power cylinder 8b.
a simultaneously projects into the guide rail and presses the end of the shutter curtain 3 to press the shutter curtain end against the flat bar 7. Thus, when the opening is fully closed, the left and right ends of the shutter curtain 3 are connected to the shield layer of the building via the flat bar 7 and the guide rail 1. The pressing device 8 operates only when the opening is fully closed.

As shown in FIG. 1, one side of the slat 4 is flat, and such a slat 4 is overwrapped to form one side of the shutter curtain 3 (FIG. 1).
(On the left side) is formed substantially flat as a whole.
In the present embodiment, such a flat surface of the shutter curtain 3 is pressed against the flat flat bar 7, so that the left and right ends of the shutter curtain 3 and the guide rail 1 are connected. A gap is prevented as much as possible.

A receiving plate 9 made of a metal flat bar is buried in the floor surface at a position where the shutter curtain 3 descends, and the receiving plate 9 is connected to a shield layer of the floor. I have.
When the opening is fully closed, the braided wire 6 provided on the seat plate 5 at the lower end of the shutter curtain abuts on the receiving plate 9, whereby the lower end of the shutter curtain 3 is connected to the shield layer of the floor. Connected. A pit may be formed on the floor, and the lower end of the shutter curtain may be received in the pit.

The electromagnetic shield shutter device having the above-described structure is configured such that the shutter car is closed when the opening is fully closed.
The right and left ends of the ten 3 are flat bar 7 by the pressing device 8.
Connected to the electromagnetic shield layer of the building by being pressed
The lower end of the shutter curtain abuts on the receiving plate 9 via the conductive braided wire 6 to be connected to the electromagnetic shield layer on the floor surface. Since the slats 4 constituting the shutter curtain 3 are overwrapped with each other, a large contact portion between the slat connecting portions 4a can be obtained. Also, since the shutter case 2 is screwed at a pitch of 75 mm or less, a gap generated at the joint of the shutter case 2 is prevented as much as possible.

[0019]

The present invention is configured as described above.
The electromagnetic shutter is used while adopting the shutter device.
A good electromagnetic shield can be formed in the opening of the shield space.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing a lintel portion of a shutter device.

2A is a schematic plan view of an opening of a shield space, FIG.
(B) is a front view of the shutter case, and (c) is a schematic longitudinal sectional view of the shutter case.

3A and 3B are side views of the pressing device, wherein FIG. 3A is a partially enlarged view and FIG. 3B is a schematic overall view.

FIG. 4 is a plan view showing a relationship between a guide rail and a pressing portion of a pressing device.

FIG. 5 is a plan view showing a relationship between a guide rail located outside the room and a pressing device.

FIG. 6 is a plan view showing a relationship between a guide rail located on the indoor side and a pressing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 2 Shutter case 3 Shutter curtain 4 Slat 5 Seat plate 6 Braided wire 7 Flat bar 8 Pressing device 9 Receiving plate

Continuation of the front page (72) Inventor Jota Kusayama 4-1 Egasakicho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Tokyo Electric Power Company (72) Inventor Hiroshi Tsuchida 4th Egasakicho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture No. 1 Inside Tokyo Electric Power Company (72) Inventor Tadashi Murashige 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Shinichi Tamanaga Naka-ku, Yokohama, Kanagawa 4-51 Otacho Kashima Construction Co., Ltd. Yokohama Branch (72) Inventor Akihide Saito 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo F-term in Sanwa Shutter-Industry Co., Ltd. 5E321 AA14 AA42 AA45 AA46 CC09 GG05

Claims (1)

[Claims] A shutter curtain housed in a shutter case installed above an opening of an electromagnetic shield space is guided by guide rails erected on the left and right sides of the opening to descend. An electromagnetic shield shutter that completely closes the opening portion by performing over-lapping connection of a plurality of metal slats in a vertical direction. A conductive braided wire is provided on the seat plate at the lower end of the shutter curtain, and the shutter is disposed at a desired interval in the longitudinal direction of the guide rail and is provided in the guide rail groove. A pressing device having a plurality of pressing portions protruding from the shutter is provided. When the opening is fully closed, the pressing device presses the left and right end portions of the shutter curtain toward the inner wall of the guide rail, thereby forming a building. A braid connected to the field layer and provided on the seat plate; Building through the receiving plate provided in the floor sheet - electromagnetic, characterized in that connected to the shield layer sheet - Rudoshatta -.