JPH0648952Y2 - Opening / closing structure of electromagnetic wave shield door - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an opening / closing structure of an electromagnetic shield door.

[Conventional technology]

Nowadays, there is an increasing demand for what is called an intelligent building or the like, which shares information communication equipment such as a computer and performs information communication with the outside of the building. In the building,
Radio waves are often used for information communication, and information communication devices may malfunction due to radio waves from outside, emission of noise radio waves, and television intermediate frequency in a building.

Therefore, it is necessary to have an electromagnetic shield room that is electromagnetically shielded from the outdoor space using an electromagnetic shield material.
In the electromagnetic wave shield room, openings such as a doorway, a ventilation port, and a power source are formed. In particular, it is important to eliminate the electrical gap of the electromagnetic wave shield door in the opening formed in the electromagnetic wave shield wall. If there is such an electric gap, at high frequencies, the electromagnetic wave shielding effect will be reduced due to leakage of the electromagnetic wave from this electric gap.

Thus, the electromagnetic wave shield door has a hinged opening / closing structure, and the state when the front end thereof is closed is shown in FIG. In the figure, the end 21 of the electromagnetic shield door 21
While providing the locking member 22 consisting of fingers in A,
Side edge 24A of the opening 24 formed in the electromagnetic wave shield wall 23
A spring plate 25 made of beryllikum that locks with the locking member 22 (first
(Fig. 10) is provided, and the electromagnetic wave shield 21 is held by the electromagnetic wave shield wall 23 by locking the locking member 22 to the spring plate 25 when the electromagnetic wave shield door 21 is closed. .

[Problems to be solved by the invention]

However, in the above-mentioned opening / closing structure of the electromagnetic wave shield door 21, the spring plate 25 deteriorates over time due to repeated use and its shape is not retained, the elastic force decreases, and when the electromagnetic wave shield door 21 is closed, it is locked. A gap may be generated between the member 22 and the spring plate 25, electromagnetic waves may leak from the gap, and electrical connection may be incomplete.

[Purpose of device]

The present invention has been made to solve the above problems, and an object thereof is to provide an opening / closing structure for an electromagnetic wave shield door having improved electromagnetic wave shield performance.

[Means for solving problems]

To achieve the above object, the present invention rotatably supports one end side of an electromagnetic wave shield door at one side edge of an opening of an electromagnetic wave shield wall and a locking member at the other end side of the electromagnetic wave shield door. And a receiving portion for receiving the locking member is provided on the other side edge portion of the opening, and when the electromagnetic shielding door is closed, the locking member is locked to the receiving portion so that the electromagnetic shielding door is attached to the electromagnetic shielding wall. In an opening / closing structure of an electromagnetic wave shield door to be held, a temperature sensitive member is provided on at least one of a locking member and a receiving portion, and the locking member or receiving portion corresponds to the other receiving portion or locking member when the electromagnetic wave door is closed. And, it is configured to be electrically connected or disconnected via the temperature sensitive member.

[Function of device]

In the present invention, when the electromagnetic shield door is closed,
The locking member and the receiving member are electrically connected via the temperature sensitive member.

When the electromagnetic wave shield door is opened or closed, the temperature sensitive member is deformed by heating or cooling the temperature sensitive member, and the electrically connected state between the locking member and the receiving portion is released.

[Example of device]

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an opening / closing structure of an electromagnetic wave shield door according to a first embodiment of the present invention.

In FIGS. 1 and 3, reference numeral 1 is an electromagnetic wave shield wall, and an opening 2 is formed at an appropriate position thereof. Reference numeral 3 is an electromagnetic wave shield door, which is composed of a metal plate 3A and a wood 3B sandwiched between them, and one end side 3C thereof is one side edge of the opening 2.
It is pivotally supported by 2A via a hinge 4.

A first bracket 5 is fixed to the other end 3D of the electromagnetic wave shield door 3, and a locking member 6 made of a plate-like finger is formed at the tip of the first bracket 5. A second bracket 7 is attached to the other side edge 2B of the opening 2, and a groove-shaped receiving portion 8 for receiving the locking member 6 is formed at the tip of the second bracket 7. A temperature-sensitive member 9 made of a two-way shape memory alloy is fixed to both wall surfaces 8A of the receiving portion 8. As shown in FIG. 2, the temperature-sensitive member 9 is an elongated plate material having a crank-shaped cross section, has a crank-shaped cross section at room temperature, and expands when heated to an appropriate temperature by an appropriate heating means. Becomes a flat plate. In addition, 10 is a joiner composed of wire mesh,
It is fixed to the receiving portion 8.

Next, the operation of this embodiment will be described.

As shown in FIG. 1, when the electromagnetic wave shield door 3 is closed, the temperature sensitive member 9 is kept at room temperature and has a crank shape in cross section. Therefore, both side surfaces of the locking member 6 and the receiving portion 8 are connected through the temperature sensitive member 9 over the entire surface in the vertical direction, and the electromagnetic wave shield door 3 and the electromagnetic wave shield wall 1 are connected.
There is no electrical gap between the opening 2 and the electromagnetic wave and the electromagnetic wave is shielded.

As shown in FIG. 4, when the electromagnetic wave shield door 3 is opened, if the temperature sensitive member 9 is heated by an appropriate heating means,
The temperature-sensitive member 9 changes its cross section from a crank shape to a linear shape and is transformed into an elongated flat plate. Therefore, the temperature sensitive member 9 separates from the locking member 6, and the connection state between the locking member 6 and the receiving portion 8 is released. When the electromagnetic wave shield door 3 is rotated in this state, the electromagnetic wave shield door 3 is opened without the interrogation member 6 coming into contact with the temperature sensitive member 9, and a two-dot chain line is formed.

Further, when the electromagnetic wave shield door 3 in the opened state is closed, as in the case of opening the electromagnetic wave shield door 3, the temperature sensitive member 9 may be heated by an appropriate heating means so that the temperature sensitive member 9 is deformed into an elongated flat plate. Good.

According to the above configuration, when the temperature sensitive member 9 is heated when the electromagnetic wave shield door 3 is opened and closed, the temperature sensitive member 9 is deformed and the connection state between the locking member 6 and the receiving portion 8 is released. As a result, the electromagnetic wave shield door 3 can be opened and closed without bringing the locking member 6 into contact with the temperature sensitive member 9. Therefore, even if the electromagnetic wave shield door 3 is repeatedly opened and closed, no force is applied to the temperature-sensitive member 9 and the temperature-sensitive member 9 does not deteriorate over time, and the shape of the temperature-sensitive member 9 is maintained. Stop member 6 and receiving portion 8
There is no gap between and. As a result, electromagnetic waves can be completely shielded and electromagnetic wave shielding performance can be improved.

Further, since the temperature sensitive member 9 is formed in an elongated plate shape, the locking member 6 and the receiving portion 8 are connected over the entire surface via the temperature sensitive member 9 when the electromagnetic wave shield door 3 is closed. .
Therefore, there is no gap between the locking member 6 and the receiving portion 8 in the vertical direction, electromagnetic waves can be further shielded, and electromagnetic wave shielding performance can be improved.

FIG. 5 shows an opening / closing structure of an electromagnetic wave shield door according to a second embodiment of the present invention.

In the first embodiment, the temperature sensitive member 9 is attached to the groove 8, but in the present embodiment, the temperature sensitive member 9 is not attached to the groove 8 but attached to both sides of the locking member 6. The temperature sensitive member 9 is a two-way shape memory alloy elongated plate member, and functions in the same manner as in the first embodiment.

Also in the second embodiment, the same effect as in the first embodiment is obtained.

FIG. 6 shows an opening / closing structure of an electromagnetic wave shield door according to a third embodiment of the present invention.

In the first embodiment, the locking member 6 is composed of fingers and the receiving portion 8 is groove-shaped. However, in this embodiment, the locking member 31 is groove-shaped and the receiving portion 32 is finger-shaped. The temperature sensitive member 9 is attached to both side surfaces of the receiving portion 32. This temperature sensitive member 9 is
It is an elongated plate material made of a two-way shape memory alloy and functions in the same manner as in the first embodiment.

Also in the third embodiment, the same effect as that of the first embodiment is obtained.

7 and 8 show an opening / closing structure of an electromagnetic wave shield door according to a fourth embodiment of the present invention.

As shown in the figure, an electromagnetic wave shield door 33 is arranged in the opening 2 formed in the electromagnetic wave shield wall 11. A locking member 34 having a crank-shaped cross section is provided at the tip of the electromagnetic wave shield door 33, and two-direction type temperature memory members 9A, 9B and 9C made of a shape memory alloy are attached to the locking member 34. A receiving portion 35 is provided at a side edge portion of the opening 2 so as to face the locking member 34,
The receiving portion 35 has a temperature sensing member 9 made of a two-way shape memory alloy.
D and 9E are attached. The temperature sensitive members 9A, 9B, 9C, 9D, 9E have a crank shape in cross section at room temperature, and when heated to an appropriate temperature by an appropriate heating means, they extend and become elongated flat plates.

When the electromagnetic shield door 33 is closed, it is shown in FIG. 7, and when the temperature sensitive members 9A, 9B, 9C, 9D, 9E are heated by an appropriate heating means in this state, as shown in FIG. It becomes an elongated flat plate. Therefore, the connection state between the locking member 34 and the receiving portion 35 is released, and the electromagnetic wave shield door 33 is ready to be opened.

Also in the fourth embodiment, the same effect as that of the first embodiment is obtained.

In the above embodiment, when the electromagnetic wave shield door is opened / closed, the temperature sensitive member is heated to release the connection between the locking member and the receiving portion, but the temperature sensitive member is cooled. As a result, the connection state between the locking member and the receiving portion can be released.

Further, in the above-mentioned embodiment, the bidirectional shape memory alloy is used as the temperature sensitive member, but it is also possible to use the unidirectional shape memory alloy in combination with a suitable spring material.

Furthermore, in the above embodiment, as an example of the temperature sensitive member,
Although the plate material of the shape memory alloy has been described, the member is not limited to this, and any member that can be deformed by temperature may be used. For example, a bimetal may be used.

[Effect of device]

As described above, according to the electromagnetic shield door opening / closing structure of the present invention, when the electromagnetic shield door is opened / closed,
When the temperature-sensitive member is deformed by heating or cooling the temperature-sensitive member, the electrical connection state between the locking member and the receiving portion is released, and the electromagnetic wave shield door can be opened and closed without applying force to the temperature-sensitive member. . Therefore, even if the electromagnetic wave shield door is repeatedly opened and closed, the temperature-sensitive member does not deteriorate with age, the shape of the temperature-sensitive member is maintained, and the space between the locking member and the receiving portion is maintained when the electromagnetic wave shield door is closed. There is no electrical gap in the area. As a result, the electric gap of the electromagnetic wave shield door in the opening formed in the electromagnetic wave shield wall is eliminated, electromagnetic waves can be completely shielded, and electromagnetic wave shielding performance can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of an opening / closing structure of an electromagnetic wave shield door according to a first embodiment of the present invention. FIG. 2 is a perspective view of the temperature-sensitive member made of shape memory alloy in FIG. FIG. 3 is a sectional view showing the entire opening / closing structure of an electromagnetic wave shield door according to the first embodiment of the present invention. FIG. 4 is an explanatory view of the operating state of the first embodiment of the present invention. FIG. 5 is a sectional view showing a main part of an opening / closing structure of an electromagnetic wave shield door according to a second embodiment of the present invention. FIG. 6 is a sectional view showing an essential part of an opening / closing structure of an electromagnetic wave shield door according to a third embodiment of the present invention. FIG. 7 is a sectional view showing a main part of an opening / closing structure of an electromagnetic wave shield door according to a fourth embodiment of the present invention. FIG. 8 is an explanatory view of a working state of the fourth embodiment of the present invention. FIG. 9 is a cross-sectional view showing a main part of a conventional electromagnetic shield door opening / closing structure. FIG. 10 is a perspective view of the leaf spring in FIG. [Explanation of symbols of main parts] 1 ... Electromagnetic wave shield wall 2 ... Opening 2A ... One side edge of the opening 2B ... Other side edge of the opening 3 ... Electromagnetic wave shield door 3C ... … One end side 3D …… Other end side 6 …… Locking member 8 …… Receiving part 9 …… Temperature sensitive member.

Claims (3)

[Scope of utility model registration request] 1. An electromagnetic wave shield door is rotatably supported at one side edge of an opening of an electromagnetic wave shield wall, and an engaging member is provided at the other end of the electromagnetic wave shield door and the engaging member is provided. A receiving part is provided on the other side edge of the opening, and when the electromagnetic shield door is closed, the locking member is locked to the receiving part to hold the electromagnetic shield door on the electromagnetic shield wall. In the structure, a temperature sensitive member is provided on at least one of the locking member or the receiving portion, and the locking member or the receiving portion and the corresponding other receiving portion or the locking member when the electromagnetic wave door is closed,
An opening / closing device for an electromagnetic wave shield door, which is configured to be electrically connected or disconnected via the temperature sensitive member. 2. The opening / closing structure for an electromagnetic wave shield door according to claim 1, wherein the temperature sensitive member is a member made of a shape memory alloy. 3. The opening / closing structure of an electromagnetic wave shield door according to claim 1, wherein the temperature sensitive member is made of bimetal.