JPS6223480B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an anechoic chamber door shield structure.

A shield structure that blocks external radio waves with a double structure surrounding an anechoic chamber is already known.

However, since the connection to the opening/closing door that had been used up until now was simply by abutting or adhering metal plates, it was difficult to obtain a reliable shielding effect, and the shield connection part was subject to significant wear. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to propose an anechoic chamber door shield structure that provides a reliable shielding effect, has less wear on the connecting parts, and has less contact resistance when the door is moved.

According to the anechoic chamber door shield structure according to the present invention, in an anechoic chamber configured to cover the opening of the anechoic chamber main body with a double-opening sliding door, the door has a radio wave shield attached to the shielding body on the indoor side of the door main body. An absorbing panel is arranged, and the shielding body forms two layers of an inner shield layer and an outer shielding layer on an insulator, and is configured to have a cross-sectional shape that is bent toward the indoor side along the circumferential direction of the door body. A set of first recesses separated by an insulator are formed on the four circumferences of the shield at the opening of the main body of the anechoic chamber, and a pair of first recesses separated by an insulator are formed on the outside of the folded part of the shield on the door side in parallel with and in the same direction as the first recesses. A pair of second recesses separated by an insulator are formed in the door body, and the door is provided around the four circumferences of the door body and can move forward and backward toward the indoor side, and is inserted into the first and second recesses at the indoor end. and a movable part provided with a pair of first and second insertion pieces each capable of electrically connecting the inner and outer shield layers of the shield, and further provided on the indoor side of the double door main body. The mating surface opposing portions of the provided shield are formed in an L-shape, and one set of third portions separated by an insulator are provided in one of the opposing portions, similar to the first and second recesses. Finger contacts are installed as resilient bodies in the first, second and third recesses, and the inner and outer shield layers of the shield are inserted into the third recess in the other opposing part. It is characterized in that a set of third insertion pieces are provided, each of which can be electrically connected independently.

The following will explain the embodiments shown in the drawings.

The drawings show an embodiment of the anechoic chamber door shield structure according to the present invention, and FIG. 1 is a plan view of the anechoic chamber, and FIG.
3 is a partially enlarged view showing the shield mechanism at the periphery of the anechoic chamber, and FIG. 4 is a partially enlarged view showing the shield mechanism at the door assembly section.

As shown in FIG. 1, the anechoic chamber 1 consists of a anechoic chamber main body 1' and a sliding door 3 whose opening can be closed in a sliding manner.The inside of the anechoic chamber 1 is lined with radio wave absorption panels 2. It is being The radio wave absorbing panel 2 is constructed by using a radio wave absorbing material such as ferrite tile as a base and pasting a dielectric material such as carbon-containing styrene foam or urethane foam on the surface thereof. As shown in FIG. 2, one wall of the anechoic chamber 1 is entirely composed of a pair of sliding doors 3, and the sliding door 3 has a radio wave absorbing panel 2, a shield 4, and the door body. It has a structure consisting of 5 parts.

A shield 4' attached to the indoor side of the door body 5
Similar to the shielding body 4 constituting the outer wall of the anechoic chamber main body 1', there are independent metallic inner shielding layers 15' and outer shielding layers 1 on the indoor side and outdoor side of the insulator, respectively.
3' is formed.

Furthermore, the inner and outer shield layers 15 and 13 are provided over the entire circumference of the shield 4 at the opening of the anechoic chamber main body 1'.
Connecting fittings 15 _-1 , 13 _-1 respectively connected to the ends of
are attached and the first recess 6,
6' is formed, and leaf spring-shaped finger contacts 7 made of copper springs are attached to both inner walls of each of the first recesses 6, 6'.

The shield 4' attached to the door body 5 has its peripheral edge projecting in a cross-sectional shape toward the opening of the anechoic chamber body 1' by an appropriate width over the entire circumference. Cross section of this shield 4': On the surface of the protrusion facing the door body 5, a connecting fitting 15' is connected to the inner and outer shield layers 15' and 13' as described above.
_-1 , 13' _-1 are attached, and second recesses 8, 8' are formed by the connecting fittings, and finger contacts 7 are attached as resilient bodies on both side walls of the second recesses 8, 8'.

A moving mechanism 9 is installed along the entire circumference of the door body 5 at a position facing the first recesses 6, 6' and the second recesses 8, 8'. This moving mechanism 9
is provided with a pair of first insertion pieces 10, 10 and a second insertion piece 11, 11' corresponding to the first recesses 6, 6' and second recesses 8, 8', respectively, and corresponding to the movement mechanism 9. A support member 12 is attached which extends in the circumferential direction.

These first recesses 6, 6', second recesses 8, 8',
First insert 10, 10' and second insert piece 1
The respective terminals 1 and 11' are separated by an insulator, and insulation between the inner and outer shield layers 15 and 13 is maintained.

The moving mechanism 9 is movable horizontally with respect to the door body 5 toward the first recesses 6, 6' and the second recesses 8, 8', and includes a first insertion piece 10 attached to a support member 12. 10' and the second insertion pieces 11, 11' are completely inserted into the corresponding second recesses 6, 6' and second recesses 8, 8', respectively,
It is also movable so that it can be pulled out and completely separated.

The mating surface facing portion of the shield 4' provided on the indoor side of the left-right sliding door body 5 faces the door body 5 side and is formed in an L-shape, and one of the opposing surfaces has the first and a set of third recesses 19 separated by an insulator 14 similar to the second recesses 6, 6' and 8, 8';
19' are provided at appropriate intervals, and finger contacts 7 are provided as projecting bodies on both inner walls of each.
is installed.

Third insertion pieces 20, 20' extending corresponding to the third recesses 19, 19' are provided on the other surface of the shield 4' facing the mating portion.

Furthermore, a door positioning mechanism 16 is provided in the mating portion of the door body 5, and the door positioning mechanism 16 has a pair of fitting recesses 17 on one side of the door body 5 facing the mating portion. It extends over an appropriate length in the height direction, and a fitting piece 18 corresponding to the fitting recess 17 extends on the other opposing surface to position the mating portion of the door body 5. The structure is such that it can be carried out easily and reliably.

Also, the first recesses 6, 6' and the first insertion pieces 10, 10', the second recesses 8, 8' and the second insertion pieces 11, 11', and the third recesses 19, 19' and the third insertion piece 20. , 20', the inner and outer shield layers 15, 15' and 13, 13' formed on the shielding body 4' of the anechoic chamber body 1' and the door body 5 are electrically integrated, respectively. Inner and outer shield layer 1
5, 15' and 13, 13' make it possible to construct a double electrically shielded anechoic chamber 1.

In the above configuration, when the sliding door 3 is opened, the moving mechanism 9 moves the first insertion pieces 10, 10' attached to the support member 12 from the first recesses 6, 6' to the second insertion pieces 11, 11'. second recess 8,
8' to open the shield. Subsequently, the sliding door 3 is pulled left and right and the third insertion pieces 20, 20' are pulled out from the third recesses 19, 19' to open the shield of the sliding door 3 itself.

In addition, when the sliding door 3 is closed, the sliding door 3 is pulled from the left and right sides respectively, and the door positioning mechanism 1
Align the fitting pieces 18 of No. 6 with the fitting recesses 17, and securely insert the third insertion pieces 20, 20' into the third recesses 19, 19' to remove the left and right inner shields 1 of the shield 4'.
5', and outer shield layers 13' on the left and right sides of the shielding body 4'.
are independently integrated, thereby completing the double shielding of the sliding door 3 itself.

After this, the first insertion pieces 10, 10' attached to the support member 12 by the moving mechanism 9 are inserted into the first recesses 6, 6', and the second insertion pieces 11, 11' are inserted into the second recesses 8, 8'. . As a result, the anechoic chamber 1
The inner shield layer 15 of the wall, the inner shield 15 of the support member 12, and the inner shield layer 1 of the shield 4'
5' are integrated. Furthermore, the outer shield layer 13 of the anechoic chamber 1 and the outer shield layer 13 of the support member 12
and the outer shield layer 13' of the shield 4' are integrated. In this way, the anechoic chamber is completely double-shielded by the outer shield layer 13 and the inner shield layer 15.
Further, as shown in FIGS. 3 and 4, the insertion piece and the recess are provided in a double arrangement, but a single arrangement may be used if high insulation accuracy is not required. Note that a copper plate plus insulating sheet, a galvanized iron plate, or the like is used for the inner shield layer or outer shield layer.

In this embodiment, the opening of the anechoic chamber is closed with a double sliding door, but it is also possible to use a structure in which one panel is solidified in the anechoic chamber and the remaining opening is closed with a single sliding door.

The anechoic chamber door shield structure according to the present invention is as described above, and can provide the following effects.

Since the shield mechanism is connected only when the door is closed,
A reliable shielding effect can be obtained, and since the connection part is a socket type, a reliable shielding effect can be obtained, and there is little wear on the connection part, and the contact resistance when moving the door is low.

Additionally, the space required to move the door is relatively small.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the anechoic chamber, Fig. 2 is a plan view showing the relationship between the door and the shield mechanism, Fig. 3 is a partially enlarged view showing the shield mechanism of the periphery F of the anechoic chamber, and Fig. 4 is the door assembly section. FIG. 3 is a partially enlarged view showing the shield mechanism of E. 1...Anechoic chamber, 1'...Anechoic chamber body, 2...
...Radio wave absorption panel, 3...Sliding door, 4,4'
... Shielding body, 5 ... Door body, 6, 6' ... First recess, 7 ... Finger contact, 8, 8' ...
Second recess, 9... Moving mechanism, 10, 10'... First insertion piece, 11, 11'... Second insertion piece, 12... Support member, 13, 13'... Outer shield layer, 14... ...Insulator, 15, 15'... Inner shield layer, 16... Door positioning mechanism, 17... Fitting recess, 18... Fitting piece, 19, 19'... Third recess, 20, 20'... ...Third insertion piece, 13
_-1 , 13' _-1 , 15 _-1 , 15' _-1 ... Connection fittings.

Claims (1)

[Claims] 1. A shielding system in which one side of the room is opened, a radio wave absorbing panel is placed on the indoor side surrounding the room, and two layers of an inner shield layer and an outer shield layer are formed on an insulator on the outdoor side. In an anechoic chamber, the body of the anechoic chamber is constructed by arranging the body of the anechoic chamber, and the opening is closed with a double door that can be moved in a sliding manner. A panel is arranged, and the shield is formed with two layers, an inner shield layer and an outer shield layer, on an insulator, and has a cross-sectional shape that is bent toward the indoor side along the circumferential direction of the door body. A set of first recesses separated by an insulator are formed on the four circumferences of the shield at the opening of the main body of the anechoic chamber, and a set of first recesses separated by an insulator is formed on the outside of the folded part of the shield on the door side in parallel with and in the same direction as the first recesses. A pair of second recesses separated by an insulator are formed around the four circumferences of the door body, and are movable toward the indoor side, and are inserted into the first and second recesses at the indoor end. a movable part provided with a pair of first and second insertion pieces each capable of electrically connecting the inner and outer shield layers of the shield, and further provided on the indoor side of the double door main body. The facing portion of the mating surface of the shield is formed in an L-shape, and one of the facing portions is provided with a set of third recesses separated by an insulator in the same way as the first and second recesses. A finger contact is installed as a resilient body in the first, second and third recesses, and a finger contact is installed in the third recess in the other facing part to cover the inner and outer shield layers of the shield. An anechoic chamber door shield structure characterized by being provided with a set of third insertion pieces that can each be electrically connected independently.