JPH0249038B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic shielding room, also called an RF shielding room.

Many countries have begun regulating high-frequency interference not only with electronic devices mounted on rockets and artificial satellites, but also with home appliances and electronic devices installed in automobiles. These electronic devices must not interfere with other electronic devices and must be able to withstand noise from other devices. For this purpose, electromagnetic shielding rooms are used that can ensure an environment with few interference waves and measure the noise characteristics of electronic devices and the like. FIG. 1 is a schematic perspective view of an electromagnetic shielding chamber.
The electromagnetic wave shielding room 1 is equipped with a door 2 for the entrance and exit of people or equipment, and a frame 3 for ensuring the contact between the door 2 and the shielding surface and ensuring the shielding characteristics. There is. As a contact method between the door 2 and the frame 3, a finger spring contact method and a permanent magnet flat contact method are generally put into practical use. The former uses a concave elastic member (such as beryllium copper) on one side of the door or frame.
A protrusion is provided on the other side, and the contact between the door and frame is maintained by fitting the two together.The latter is a method that maintains contact between the door and frame by providing a protrusion on one side of the door or the frame, and this magnet attracts the metal of the other side. This is to make contact between the frame and the frame. In either method, the part of the frame that touches the floor, that is, the stile, is raised about 100 mm above the floor surface in order to make contact between the door and the frame. In FIG. 2, only the door 2 and frame 3 portions of FIG. 1 are extracted. FIG. 3 shows the door 2 and frame 3 in FIG. 2 in contact with each other, that is, the door 2 is closed.

Therefore, when carrying in and out heavy objects, a method is adopted in which a slope is provided to the stile 4 in order to overcome the difference in level between the stile 4 and the floor 5 shown in Figs. was.

Figures 6 and 7 show examples of such slopes. Figure 6 shows the shape of the slope 6 when the floor 5 is flat, and Figure 7 shows the shape of the slope 6 when the floor 5 has a step. There is.

As described above, the conventional structure had drawbacks such as requiring a great deal of effort to climb over the stile and being fraught with danger.

The object of the present invention is to provide an electromagnetically shielded room to overcome these drawbacks.

In order to achieve the above object, the electromagnetic wave shielding room according to the present invention is used in conjunction with a door for the entry and exit of people, equipment, etc., and when the door is closed, the electromagnetic wave shielding room is In an electromagnetic shielding room in which a frame that contacts the peripheral edge of the door is built into one wall, one side of the frame that contacts the floor is configured to be removable.

According to the above configuration, the object of the present invention is completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. FIG. 8 is a diagram showing an embodiment of the electromagnetic shielding room according to the present invention, where 3 is a frame, 5 is a floor, and 40
indicate removable frames. The conventional frame, that is, the stile 4 that comes into contact with the floor surface, is integrated with the frame 3 and cannot be attached or detached. Therefore, a step was created between the floor 5 and a slope 6. The removable frame 40 according to the present invention can be removed from the frame 3 and the floor 5, and can be removed to flatten the floor 5 when carrying in and out of heavy objects. Therefore, in the same way as on a flat floor,
It is possible to carry in and out heavy objects. The removable frame 40 is attached to the floor/frame using screws or the like. In order to reduce the amount of electromagnetic wave leakage at the contact points between the stile and the frame/floor, it is necessary to make contact without any gaps.

FIG. 9 shows the steps shown in FIG.
This is an example in which a high frequency gasket 7 is provided on the end face. FIG. 10 shows an example in which the removable frame 40 is divided into three parts 41, 42, and 43, and high-frequency gaskets 7 are provided on the end surfaces of the contact areas between the frames and the contact area with the floor 5. For large and heavy items, detachable frames 41, 42, 43
In the case of small and heavy items, it is also possible to remove only the removable frame 42 for carrying in and out. In addition, it is also possible to divide the frame so that only the wheels of the truck can be moved.

As described above in detail, the removable frame according to the present invention can be removed when carrying heavy objects into and out of the electromagnetic shielding room, so there is an advantage that the floor becomes flat and the movement of heavy objects becomes easier. Selecting the length of the removable frame to the required length, dividing the removable frame into the required number, and installing high frequency gaskets are included in the invention.

[Brief explanation of drawings]

Figure 1 is a perspective view of the electromagnetic shielding room, Figure 2 is a perspective view with the door and frame removed, Figure 3 is a perspective view with the door closed, Figure 4 is a diagram showing the floor and frame, Figure 5 is a sectional view taken along line A-A in Figure 4, and Figure 6
Figure 7 and Figure 7 are diagrams showing the state of the slope, Figure 8 is a diagram showing an embodiment of the electromagnetic shielding room according to the present invention, Figure 9 is a diagram showing a removable stile, and Figure 10 is a diagram showing a divided removable stile. It is a diagram. 1... Electromagnetic shielding room, 2... Door, 3... Frame, 4... Stile, 5... Floor, 6... Slope, 7...
...High frequency gasket, 40...Removable frame, 41-4
3...Separate removable frame.

Claims (1)

[Claims] 1. Used in conjunction with a door for the entry and exit of people, equipment, etc., and which contacts the peripheral edge of the door by magnetic force or biasing force when the door is closed. An electromagnetic wave shielding room in which a frame is incorporated into one wall, wherein one side of the frame that contacts the floor is configured to be detachable. 2. The electromagnetic wave shielding chamber according to item 1, wherein one side of the frame is divided into a plurality of pieces and is detachable. 3. The electromagnetic wave shielding chamber according to item 1, characterized in that a high frequency gasket is provided between one side of the frame and the floor or other frame portion.