JPS6317238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling an anechoic chamber.

Conventionally, when assembling an anechoic chamber, a wooden frame or lightweight steel frame was installed at the construction site, and a shield room was constructed by attaching shielding materials or assembling shield panels at the construction site. The method involved fixing radio wave absorbers to walls, floors, and ceilings with adhesive to create an anechoic chamber.

However, in order to form internal and external shield layers using conventional construction methods, the framework was placed at a distance from the wall of the existing structure, and the work to install shielding materials etc. was done from both sides, making the work on site time-consuming. It is difficult to install a complete wall of radio wave absorbers, and as time passes, radio wave absorbers tend to fall off, especially on ceiling surfaces, and even at construction sites, there is a large amount of work space on both sides of the outside and inside walls of the anechoic chamber. required. Therefore, the purpose of this invention is to install a radio wave absorber in a factory, which is extremely safe as it is possible to fully check the installation state, and also to reduce costs by improving efficiency at the construction site, and to install the radio wave absorber in an anechoic chamber or The purpose of this project is to propose an anechoic chamber assembly method that requires only a work space to be provided outside the room.

This invention brings the vertical connecting portions of the outer shield layer bent into a stepped portion formed at the corner of the back side of the frame into contact with each other, and fixes the horizontal connecting portions within the stepped portion via a shield connecting plate. , is characterized in that the inner shield layers are assembled by being fixed to each other by a shield connecting plate outside the stepped portion.

This will be explained below with reference to the illustrated embodiments. FIG. 1 shows a schematic diagram of the anechoic chamber 1. The anechoic chamber 1 is composed of a shield panel 2 with a radio wave absorber. The shield panel 2 with a radio wave absorber is made of wood or lightweight steel, and is made into a hollow plate shape that is lightweight and has sufficient strength to form a framework 3. Steel or copper foil is pasted on the front and back surfaces of the framework 3, and the outside is A shield layer 4 and an inner shield layer 5 are formed. Furthermore, shield panel 2
A radio wave absorber 6 is attached on the shield layer 5. The radio wave absorber 6 is formed by forming a dielectric material such as carbon-containing foamed polystyrene or urethane on a ferrite tile or the like.

A method of assembling the joint portion D of the anechoic chamber 1 employing this shield panel 2 with a radio wave absorber will be explained using the drawings from FIG. 2 onwards.

The back side corners of the connecting end faces of the frame sets 3, 3' of the panels 2, 2' form a stepped part cut out to an appropriate length and width over the entire length of the side.

The outer shield layers 4, 4' attached to the surfaces of the shaft assemblies 3, 3' have vertical connection parts 4a, 4a' bent along the connection end surfaces, and horizontal connection parts 4b, 4b bent along the horizontal plane of the step, respectively. 4b'.

Further, inner shield layers 5, 5' are formed on the back side (indoor side) of the frame assemblies 3, 3' except for the stepped portions.

Of these, on the shield layers 5, 5' there is a space left for attaching the shield connecting plate 7', and the radio wave absorber 6,
6' is attached.

When connecting the radio wave absorber shield panels 2, 2', the shield panels 2, 2' are sequentially brought closer to each other from the indoor side, and the vertical connection portions 4a, 4a' of the outer shield layers 4, 4' are brought into contact with each other. The outer shield layer 4,
Both horizontal connection parts 4b, 4' are connected via a shield connecting plate 7 spanning the entire length of the horizontal connection parts 4b, 4b'.
Fix 4b' with screw 8 or the like.

Therefore, in the outer shield layers 4, 4' of the shield panels 2, 2', the vertical connection parts 4a, 4a' and the horizontal connection parts 4b, 4b' are continuously integrated, so complete shielding can be achieved. .

Next, the shield panels 2, 2' are formed with a predetermined width that allows the inner shield layers 5, 5' to be stretched over the stepped portions.
A shield connecting plate 7' extending over the entire width is spanned over the inner shield layers 5, 5' and soldered to continuously integrate the inner shield layers 5, 5'. The shield connecting plates 7, 7' can be attached by a combination of screwing and soldering depending on the situation. Note that the stepped portions formed on each part of the back side of the framework can also be provided on the front side.

The method for assembling an anechoic chamber according to the present invention is as described above, and can bring about the following effects.

When assembling an anechoic chamber, the radio wave absorber and the construction panel are integrally formed in advance at the factory.
Depending on the construction site, it is possible to assemble the anechoic chamber only from the indoor side or the outdoor side, allowing for effective use of space and cost reduction.

In addition, since the connecting portion of the outer shield layer consists of vertical and horizontal connecting portions, the outer shielding effect is more reliable, and the horizontal connecting portions can be easily fixed from the indoor side, and because they are inside the stepped portion. It will not damage the radio wave absorber.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an anechoic chamber, FIG. 2 is a sectional view showing an embodiment of the invention, and FIG. 3 is a perspective view thereof. 1... Radio anechoic chamber, 2... Shield panel with radio wave absorber, 3... Frame assembly, 4... Outer shield layer,
4a, 4a'... Vertical connection part, 4b, 4b'... Horizontal connection part, 5... Inner shield layer, 6... Radio wave absorber, 7... Shield connection plate, 8... Screw, D...
...joint club.

Claims (1)

[Scope of Claims] 1. In a method of assembling a plurality of panels by forming inner and outer shield layers made of conductive shield material on the front and back surfaces of a frame assembly, and attaching a dielectric radio wave absorber on the inner shield layer, each panel A step is formed on the abutting end surface of the frame by cutting out a corner on the back side of the frame, and the outer shield layer has a vertical connecting portion bent along the abutting end surface of the panel and a horizontal surface of the step. The vertical connecting portions of adjacent panels are brought into contact with each other, and the horizontal connecting portions are fixed to each other within the stepped portion via a shield connecting plate, and the inner shield layer A method of assembling an anechoic chamber characterized by fixing the shield with a shield connecting plate outside the step.