JPH09162585A - Magnetic shielding room and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic shielding room having structure wherein cost can be reduced by using standardized articles and its assembling method. SOLUTION: An inner box 12, wherein the respective surfaces of an inner box type frame 30 defining a magnetic shielding space are covered with magnetic shielding material, is enclosed with an outer box 11 wherein the respective surfaces of an outer box type frame 15 which are isolated from the respective surfaces of the inner box 12 by a specified distance are covered with the magnetic shielding material, and a magnetic shielding room is constituted. The outer box type frame 15 and the inner box type frame 30 are formed of standardized aluminum aggregate, and the magnetic shielding material is formed by arranging a plurality of permalloy plates 16 having the same shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic shield room for covering a certain space by using a high magnetic permeability material such as Permalloy for blocking an external magnetic field, and a method for assembling the same.

[0002]

2. Description of the Related Art In order to measure a weak magnetic field using a magnetic sensor, a magnetically shielded room is required to prevent the influence of an external magnetic field in the measuring chamber. A conventional magnetically shielded room is shown in FIG. This magnetically shielded room 1
00 has a box shape. Box-shaped structural frame 102
Has a thickness of about 20 cm, and a permalloy plate 104, which is a magnetic shield material, is adhered to the inner surface and the outer surface of the structural frame 102 without a gap. as a result,
The space formed inside the structural frame 102 is a magnetic shield space that is doubly surrounded by permalloy plates 104 that are separated by the thickness of the structural frame 102.

A door 106 is provided on one side of the structural frame 102.
Is provided, and a measuring instrument can be carried in and out through this door 106, and an operator can go in and out. The door 106 is also about 20 cm like the structural frame 102.
The permalloy plate 104 is attached to both sides of the door 106. The magnetically shielded space is cut off from the external magnetic field by doubling the magnetically shielded space with permalloy, which is a high magnetic permeability material.

[0004]

In order to completely shield the external magnetic field, it is necessary to doubly enclose it with a high magnetic permeability material such as permalloy at an appropriate interval according to the size of the magnetic shield space. . Therefore, in the conventional magnetic shield room, if the required shape or size of the magnetic shield space is different, the magnetic shield room including the structural frame is manufactured as a custom-made product each time. Therefore, the conventional magnetically shielded room is very expensive.

Further, even if the shape and size of the magnetic shield space are the same, a large amount of magnetic shield rooms having the same structure are rarely needed, so that cost reduction cannot be expected due to mass production effect. It was An object of the present invention is to provide a magnetically shielded room that can be manufactured by using standard products and can reduce costs.

Another object of the present invention is to provide a method for assembling a magnetically shielded room which can be easily assembled even at an installation site.

[0007]

The above-mentioned object is to provide an inner box having an inner box form defining a magnetic shield space, a magnetic shield material covering each surface of the inner box form, and enclosing the inner box. ,
A magnetic shield, comprising: an outer box mold, each surface of which is separated from each surface of the inner box by a predetermined distance, and an outer box having a magnetic shield material which covers each surface of the outer box mold. Accomplished by the room.

In the above-mentioned magnetic shield room, a shield plate assembly in which a plurality of shield plates each having a predetermined area are arranged on the respective surfaces of the inner box mold and the outer box mold without a gap enough to the magnetic shield. It is desirable to be covered by. In the magnetically shielded room described above, it is preferable that a surplus portion of the shield plate assembly that is larger than the wall surface of the inner box mold and the wall surface of the outer box mold protrudes in a predetermined direction of each wall surface.

In the above magnetic shield room, the outer box has a plurality of sets of the outer box mold and the magnetic shield material, and the magnetic shield space is shielded by three or more magnetic shield materials. Is desirable. The above-described object is to perform a first step of placing an outer box floor frame covered with a magnetic shield material in an installation area where a magnetic shield room is installed,
The second step of placing the inner box floor frame covered with the magnetic shield material at a predetermined distance from the outer box floor frame, and the inner step covered with the magnetic shield material at the edge of the inner box floor frame. A third step of forming an inner box defining a magnetic shield space by installing a box wall frame, and installing an inner box ceiling frame covered with a magnetic shield material on the inner box wall frame; By installing an outer box wall frame covered with a magnetic shield material on the edge of the box floor frame, and installing an inner box ceiling frame covered with a magnetic shield material on the outer box wall frame, A fourth step of forming a surrounding outer box, and a magnetic shield room assembling method.

In the method for assembling the magnetically shielded room described above, the third step is to install an inner box wall frame on a peripheral portion of the inner box floor frame, and an inner box ceiling frame at an upper end of the inner box wall frame. A step of installing a plurality of shield plates with a predetermined area in the inner box wall frame without a gap enough to the magnetic shield, and a plurality of shield plates with a predetermined area in the inner box ceiling frame. The step of laying the outer box wall frame on the peripheral edge of the outer box floor frame and the outer box wall frame upper end at the upper end of the outer box floor frame. A step of installing an outer box ceiling frame; a step of laying a plurality of shield plates of a predetermined area on the outer box wall frame without a gap enough to a magnetic shield; and a plurality of predetermined areas of the outer box ceiling frame. No gap between the two shield plates for the magnetic shield It is desirable to have a step of packing can.

In the method for assembling the magnetic shield room described above, when the plurality of shield plates are spread over the inner box wall frame, the surplus portion is projected in a predetermined direction of the inner box wall frame to form the outer box. When laying a plurality of the shield plates on the wall frame, it is preferable that the surplus portion is projected in a predetermined direction of the inner box wall frame. In the method of assembling the magnetic shield room described above, the outer box floor frame,
It is desirable to use a plurality of sets of the outer box molds having the outer box wall frame and the outer box ceiling frame, and to shield the magnetic shield space with three or more magnetic shield materials.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic shield room according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing the external appearance of the magnetic shield room, FIG. 2 is an explanatory view showing the internal structure of the magnetic shield room, and FIG. 3 is an explanatory view showing the structure of each frame of the magnetic shield room. 4 is an explanatory view of how to attach the permalloy plate to the outer box wall frame or the inner box wall frame.

In this embodiment, a case where the magnetic shield room is box-shaped will be described as an example. Magnetically shielded room 10
As shown in FIGS. 1 and 2, has a double structure including an inner box 12 that defines a magnetic shield space and an outer box 11 that surrounds the inner box. The outer box sliding door 1 is provided in the outer box 11 in order to carry in and out a measuring instrument and an operator goes in and out.
3 is provided, and the inner box 12 is provided with an inner box sliding door 14.

First, the details of the structure of the outer box 11 are shown in FIG.
This will be described with reference to FIG. The outer box 11 is formed by covering the outer box mold 15 with a permalloy plate 16 made of permalloy (μ metal) which is a magnetic shield material. Outer box formwork 15
Is an outer box floor frame 17, four outer box wall frames 18 and an outer box ceiling frame 1
9 and 9 are formed in combination. These outer box floor frames 17,
The outer box wall frame 18 and the outer box ceiling frame 19 have a rectangular frame 50 shown in FIG. 3 as a basic structure. The frame 50 is formed by combining aluminum aggregates 52 in a grid pattern.
By adjusting the length of the aluminum aggregate 52, the frame 50 having an arbitrary size can be formed.

The aluminum aggregate 52 is formed of aluminum in a columnar shape. For example, a standard product manufactured as an aluminum sash member or a balcony member which is a housing building material can be used. The four outer box wall frames 18
The outer box floor frame 17 is vertically arranged on each side of the periphery.
The outer box wall frame 18 and the outer box floor frame 17 are fixed by connecting fittings (not shown) that are standard products. The outer box ceiling frame 19 is attached to the upper end of each outer box wall frame 18 fixed to the outer box floor frame 17.
Is placed horizontally. Similarly, the outer box ceiling frame 19 and each outer box wall frame 18 are also fixed by standard connection fittings (not shown).

The outer box floor frame 17 is a magnetic shield room 10.
Is installed on the floor surface 21 of the place where is installed via a permalloy plate 16. On the floor surface 21, a vibration-proof soft rubber sheet 22, a plywood composite panel 23, a permalloy plate 16, and an electromagnetic shield aluminum plate 24 are sequentially stacked. Soft rubber sheet 22,
The composite panel 23, the permalloy plate 16, and the aluminum plate 24 are lined up in rows and columns. In particular, since the permalloy plate 16 cannot form a large-sized plate material, a large number of permalloy plates 16 cannot be formed.
Is used. In order to achieve a sufficient magnetic shield effect, a large number of permalloy plates 16 are laid one on top of the other with their edges overlapping each other and without a gap.

An aluminum plate 24 is provided on each outer box wall frame 18.
And a composite panel 23 is attached. The permalloy plate 16 is attached to the composite panel 23 with screws or an adhesive. Since the permalloy plate 16 cannot form a large-sized plate material, a large number of permalloy plates 16 are pasted together with their edges overlapped with each other without any gap.

Since the permalloy plate 16 is a standard product having a fixed shape, and the outer box wall frame 18 is sized according to the size of the magnetically shielded room, the permalloy plate 16 having a fixed shape is attached to the outer box wall frame 18. If attached, in most cases, an excess portion will appear on the permalloy plate 16. In the present embodiment, this excess portion is allowed to escape by protruding in a predetermined direction of the outer box wall frame 18.

In the vertical direction of the outer box wall frame 18, the lower end of the lowermost permalloy plate 16 is brought into contact with the permalloy plate 16 of the outer box floor frame 17, and the surplus part of the uppermost permalloy plate 16 is outside. The box ceiling frame 19 is projected upward (see FIG. 2). Further, in the left-right direction of the outer box wall frame 18, for example, the right end of the rightmost permalloy plate 18 of each surface is aligned with the right end of the outer box wall frame 18, and the surplus part of the leftmost permalloy plate 16 is set to the outer box wall. The frame 18 projects leftward from the left end of the frame 18. That is, when the outer box wall frame 18 is viewed from above as shown in FIG. 4, the permalloy plate 16 is attached to each surface 18a, 18b, 18c, 18d of the outer box wall frame 18 so as to project in the same leftward direction. It is attached.

On the ceiling frame 19 of the outer box, the aluminum plate 2
4 and the composite panel 23 are attached. The permalloy plate 16 is attached to the composite panel 23 with screws or an adhesive. Permalloy plate 16
Since it is not possible to form a large-sized plate material, a large number of permalloy plates 16 are stuck together with their edges overlapped with each other without a gap.

An outer box opening 26 that communicates the inside and the outside of the outer box 11 is formed on one side surface of the outer box 11. Outer box opening 26
An outer box sliding door 13 is provided in the. Outer box sliding door 13
Also, as shown in FIG. 3, the basic structure is a rectangular frame 50 in which aluminum aggregates 52 are combined in a grid pattern.
The aluminum plate 24 and the composite panel 23 are attached to one surface of the sliding door frame 27 in which the aluminum aggregate 52 is combined, and the permalloy plate 1 is mounted on the composite panel 23.
6 is pasted.

The outer case sliding door 13 is slidably mounted by an upper rail 28 and a lower rail 29 provided on the upper and lower peripheral edges of the outer case opening 26. The outer tip of the upper rail 28 is bent downward and the outer tip of the lower rail 29 is bent upward, so that the outer box sliding door 13 is held without coming off from both rails 28, 29. Since the outer case sliding door 13 is larger than the outer case opening 26, when the outer case opening 26 is closed by the outer case sliding door 13, the permalloy plate 1 of the outer case sliding door 13 is
6 is in a state of overlapping with the permalloy plate 16 around the outer box opening 26, and the external magnetic field can be completely blocked.

Next, details of the structure of the inner box 12 are shown in FIG.
This will be described with reference to FIG. The inner box 12 is formed by covering the inner box mold 30 with a permalloy plate 16 which is a magnetic shield material. The inner box form frame 30 is formed by combining an inner box floor frame 31, four inner box wall frames 32, and an inner box ceiling frame 33.
Inner box floor frame 31, inner box wall frame 32, inner box ceiling frame 33
Has a rectangular frame 50 shown in FIG. 3 as a basic structure.
The frame 50 is formed by combining aluminum aggregates 52 in a grid pattern. By adjusting the length of the aluminum aggregate 52, the frame 50 having an arbitrary size can be formed.

The four inner box wall frames 32 are vertically arranged on each side of the peripheral edge of the inner box floor frame 31. The inner box wall frame 32 and the inner box floor frame 33 are fixed by a standard connection fitting (not shown). An inner box ceiling frame 33 is horizontally mounted on the upper end of each inner box wall frame 32 fixed to the inner box floor frame 31. Similarly, the inner box ceiling frame 33 and each inner box wall frame 32 are also fixed by standard connection fittings (not shown).

The outer box floor frame 17 is provided with a base 34 for ensuring a distance from the inner box floor frame 33. Base 3
4 is formed of an aluminum alloy. Base 34
A composite panel 23 is fixed to the composite panel 23, and a permalloy plate 16 is laid on the composite panel 23 without a gap. The inner box floor frame 33 is placed on this.

An aluminum plate 24 is provided on each inner box wall frame 32.
And a composite panel 23 is attached. The permalloy plate 16 is attached to the composite panel 23 with screws or an adhesive. Since the permalloy plate 16 cannot form a large-sized plate material, a large number of permalloy plates 16 are pasted together with their edges overlapped with each other without any gap.

Since the permalloy plate 16 is a standard product having a fixed shape, and the inner box wall frame 32 is sized according to the size of the magnetically shielded room, the permalloy plate 16 having a fixed shape is attached to the inner box wall frame 32. If attached, in most cases, an excess portion will appear on the permalloy plate 16. In the present embodiment, this surplus portion is allowed to escape by projecting in a predetermined direction of the inner box wall frame 32.

In the vertical direction of the inner box wall frame 32, the lower end of the lowermost permalloy plate 16 contacts the permalloy plate 16 under the inner box floor frame 31, and the surplus part of the uppermost permalloy plate 16 is The inner box ceiling frame 33 is projected upward (see FIG. 2). Also, the inner box wall frame 32
In the left-right direction of, for example, the right end of the rightmost permalloy plate 18 of each surface is aligned with the right end of the inner box wall frame 32, and the surplus portion of the leftmost permalloy plate 16 is moved leftward from the left end of the inner box wall frame 32. So that it sticks out. That is,
When the inner box wall frame 32 is viewed from above as shown in FIG. 4, the permalloy plate 16 is attached to each surface 32a, 32b, 32c, 32d of the inner box wall frame 32 so as to project in the same leftward direction. ing.

The aluminum plate 2 is placed on the ceiling frame 33 of the inner box.
4 and the composite panel 23 are attached. The permalloy plate 16 is attached to the composite panel 23 with screws or an adhesive. Permalloy plate 16
Since it is not possible to form a large-sized plate material, a large number of permalloy plates 16 are stuck together with their edges overlapped with each other without a gap.

An inner box opening 37 is formed on one side surface of the inner box 12 to communicate the inside and outside of the inner box 12. Inner box opening 37
An inner box sliding door 14 is provided in the. Inner box sliding door 14
Also, as shown in FIG. 3, the basic structure is a rectangular frame 50 in which aluminum aggregates 52 are combined in a grid pattern.
The composite panel 23 is attached to one surface of the sliding door frame 38 in which the aluminum aggregate 52 is combined, and the permalloy plate 16 is attached to the composite panel 23.

The inner box sliding door 14 is slidably mounted by an upper rail 39 and a lower rail 40 provided on the upper and lower peripheral edges of the inner box opening 37. Since the outer end of the upper rail 39 is bent downward and the outer end of the lower rail 40 is bent upward, the inner box sliding door 14 is held without coming off from both rails 39, 40. Since the inner box sliding door 14 is larger than the inner box opening 37, when the inner box opening 37 is closed by the inner box sliding door 14, the permalloy plate 1 of the inner box sliding door 14 is closed.
6 is in a state of overlapping with the permalloy plate 16 around the inner box opening 37, and the external magnetic field can be completely cut off.

In this embodiment, the outer box 11 and the inner box 12 of the magnetically shielded room 10 are formed by using, for example, standard products described below. The aluminum aggregate 52 that forms the frame 50 is approximately 70 mm square that is generally used as an aluminum sash member or a balcony member, and can be freely cut. Aluminum sash members and balcony members have various types of standard products in terms of shape, thickness, and length, and by selecting the required size from these, it is possible to easily and inexpensively manufacture various sizes. The frame 50 of aluminum aggregate 52 can be formed.

The permalloy plate 16 has a thickness of, for example, about 1 m.
It is formed by cutting holes for screwing in a rectangular piece having a size of about 60 cm × 90 cm and making a heat treatment on the hole. The soft rubber sheet 21 is a rubber sheet having a thickness of about 5 mm, and the composite panel 23 is about 12 m.
It is a plywood with a thickness of m. The soft rubber sheet 22 and the composite panel 23 can be freely cut and processed, and both are formed in a rectangular shape having a predetermined size. The aluminum plate 24 is formed in a rectangular shape having a thickness of about 5 mm and a predetermined size, and can be freely cut.

Next, the method of assembling the magnetic shield room according to the present embodiment will be explained with reference to FIGS. First, as shown in FIG. 5, a soft rubber sheet 22, a composite panel 23, and a permalloy plate 16 are sequentially stacked on a floor surface 21 where a magnetically shielded room is installed. The soft rubber sheet 22 and the composite panel 23 are
The outer boxes 11 are laid out so as to have a sufficient floor area. A plurality of permalloy plates 16 are lined up vertically and horizontally on the composite panel 23. The permalloy plate 16 is double-laid and has a total thickness of about 2 mm. The permalloy plate 16 is spread over a wider area than the outer box floor frame 17.

Next, as shown in FIG. 6, the permalloy plate 1
An aluminum plate 24 is laid on top of 6. The aluminum plate 24 is adjusted to have substantially the same size as the outer box floor frame 17 and is spread. The joints of the aluminum plates 24 are stitched with a tape made of copper. Subsequently, the outer box floor frame 17 is installed on the aluminum plate 24. By doing so, the outer box floor 41 in which the outer surface of the outer box floor frame 17 is covered with the aluminum plate and the 24 permalloy plate 16 is formed.

Next, as shown in FIG. 7, the base 34 is placed on the outer box floor frame 17, and the composite panel 2 is placed thereon.
3 is placed. The height of the base 34 is the permalloy plate 16 of the outer box floor frame 17, and the inner box floor frame 3 installed on the base 34.
It is set so as to be separated from the permalloy plate 16 of No. 1 by a distance of about 20 cm. This distance is, for example, 10 cm to 30 cm depending on the size of the magnetically shielded room.
Adjusted in the range of.

Next, as shown in FIG. 8, permalloy plates 16 are laid vertically and horizontally on the composite panel 23. The permalloy plate 16 is spread in three layers and has a total thickness of about 3 mm. The permalloy plate 16 is spread over a wider area than the inner box floor frame 31.
Then, the inner box floor frame 31 is placed on the permalloy plate 16.

Next, as shown in FIG. 9, four inner box wall frames 32 and an inner box ceiling frame 33 are provided on the inner box floor frame 31 to form the inner box mold 30. Four inner box wall frames 32 are placed on each side of the inner box floor frame 31, and the inner box floor frame 31 and each inner box wall frame 32 are placed.
Are fixed by connecting fittings (not shown). The inner box ceiling frame 33 is placed on the upper end of each inner box wall frame 32 fixed to the inner box floor frame 31, and the inner box wall frame 32 and the inner box ceiling frame 33 are placed.
Are fixed by connecting fittings (not shown). By fixing each inner box wall frame 32 and the inner box ceiling frame 33, the cube-shaped inner box form 30 is formed. An inner box opening 37 that penetrates the inner box wall frame 32 is previously formed in one of the inner box wall frames 32.

Next, as shown in FIG. 10, the inner box mold 30
Attach the permalloy plate 16 covering the. After forming the inner box frame 30, the composite panel 23 is attached to the entire outer side of the inner box wall frame 32 and the inner box ceiling frame 33 except the inner box opening 37. For example, the composite panel 23 is fixed to the frames 32 and 33 with brass wood screws. As a result, the inner box mold 30 is covered with the composite panel 23.

Subsequently, the permalloy plates 16 are arranged so as to cover the entire outer surface of the composite panel 23. The permalloy plates 16 are arranged in a triple stack, and have a total thickness of about 3 mm. The permalloy plate 16 is fixed to the composite panel 23 by using, for example, a brass wood screw using a screw hole that is opened in advance. The permalloy plate 16 located at the lowermost end is fixed via a permalloy angle (not shown) screwed to each composite panel 23 of the inner box floor frame 31 and the inner box wall frame 32.

The permalloy plates 16 attached to the side surface of the inner box mold 30 are arranged in order from the lower end of the side surface in the upward direction, and are arranged in order from the right side of the side surface in the left direction. In the vertical direction, the lowermost permalloy plate 16 abuts the surface of the permalloy plate 16 of the inner box floor frame 31, and the uppermost permalloy plate 16 has a surplus portion protruding from the upper end of the composite panel 23. It is escaped upwards. In the left-right direction, the aligned permalloy plates 16 project to the left from the inner box wall frame 22 and are released. In the left-right direction, the permalloy plates 16 arranged side by side may be overlapped with each other to absorb the excess portion.

The permalloy plate 16 attached to the upper surface of the inner box wall frame 33 has a surplus portion absorbed by overlapping the end portions of the arranged permalloy plates 16 with each other. Next, as shown in FIG. 11, the inner case sliding door 14 is attached to the inner case opening 37 of the inner case 12 and the interior is provided. An upper rail 39 and a lower rail 40 are attached to the outer surface of the inner box 12 around the inner box opening 37. Upper rail 39 and lower rail 40
Is formed using, for example, an aluminum aggregate with rails prepared as a standard product of an aluminum sash member. The aluminum aggregate with rails is assembled in advance at the rail mounting position when forming the inner box wall frame 32.

The sliding door frame 38 of the inner box sliding door 14 is formed to be larger than the inner box opening 37. Permalloy plate 16
Are arranged in a triple stack on one side surface of the sliding door frame 38 and have a total thickness of about 3 mm. The permalloy plate 16 is fixed to the sliding door frame 38 by a brass wood screw, for example, through a hole that has been opened in advance.
A decorative plate or the like may be attached to the other side surface of the sliding door frame 38, for example.

In this way, first, the inner box 12 whose entire outer peripheral surface is covered with the permalloy plate 16 is formed. next,
As shown in FIG. 12, an outer box floor frame 17 and four outer box wall frames 1
The outer box mold 15 of the outer box 11 is formed by 8 and the outer box ceiling frame 19. On each side of the outer box floor frame 17, four outer box wall frames 1
8 is placed and the outer box floor frame 17 and each outer box wall frame 18 are fixed by connecting fittings (not shown). Outer box floor frame 17
The outer box ceiling frame 19 is placed on each outer box wall frame 18 fixed to the outer box wall frame 18, and the outer box wall frame 18 and the outer box ceiling frame 19 are fixed by connecting fittings (not shown). Each outer box wall frame 18
By fixing the outer box ceiling frame 19 to the, the cubic outer box form 15 is formed. An outer box opening 26 that penetrates the outer box wall frame 18 is previously formed in one of the outer box wall frames 18.

Next, as shown in FIG. 13, the outer box mold 15
Then, an aluminum plate 24 and a permalloy plate 16 are attached. After forming the outer box mold 15, aluminum plates 24 are attached to the entire outer sides of the outer box wall frame 18 and the outer box ceiling frame 19 excluding the outer box opening 26. Further, the composite panel 23 is attached to the entire outer side of the aluminum plate 24. The attached composite panel 23 is, for example, a brass wood screw together with the aluminum plate 24 in each of the frames 18, 19.
Fixed to In this way, the outer surface of the outer box mold 15 is covered by the composite panel 2 via the aluminum plate 24.
It will be covered by 3.

Subsequently, the permalloy plates 16 are arranged so as to cover the entire outer surface of the composite panel 23. The permalloy plates 16 are stacked in three layers and arranged, and the total thickness is about 3 mm. The permalloy plate 16 is fixed to the composite panel 23 through a pre-drilled hole, for example, using a brass wood screw. The permalloy plate 16 located at the lowermost end is attached to each composite panel 23 of the outer box floor frame 17 and the outer box wall frame 18 via a permalloy angle (not shown) screwed.

The permalloy plates 16 attached to the side surface of the outer box mold 15 are arranged in order from the lower end of the side surface in the upward direction, and are arranged in order from the right side of the side surface in the left direction. In the vertical direction, the lowermost permalloy plate 16 contacts the surface of the permalloy plate 16 of the outer box floor frame 17, and the uppermost permalloy plate 16 has a surplus portion protruding from the upper end of the composite panel 23. It is escaped upwards. In the left-right direction, the aligned permalloy plates 16 project to the left side of the outer box wall frame 18 and are released. In the left-right direction, the permalloy plates 16 arranged side by side may be overlapped with each other to absorb the excess portion.

The permalloy plate 16 attached to the upper surface of the outer box wall frame 18 absorbs the excess by stacking the end portions of the permalloy plates 16 arranged side by side. next,
As shown in FIG. 14, an outer box sliding door 13 capable of closing the outer box opening 26 is attached to the outer box 11. Outer box opening 2
Corresponding to 6, the upper rail 28 and the lower rail 29 are attached to the outer surface of the outer box 11. Upper rail 28 and lower rail 29
Is formed using, for example, an aluminum aggregate with rails prepared as a standard product of an aluminum sash member.
The aluminum aggregate with rails is assembled in advance at the rail mounting position when the outer box wall frame 18 is formed.

The sliding door frame 27 of the outer case sliding door 13 is formed to be larger than the outer case opening 26. Permalloy plate 16
Are arranged in a triple stack on one side surface of the sliding door frame 27 and have a total thickness of about 3 mm. The permalloy plate 16 is fixed to the sliding door frame 27 by a wood screw made of brass, for example, through a hole that is opened in advance.
A decorative plate or the like may be attached to the other side surface of the sliding door frame 27.

In this way, the outer box 11 whose entire outer peripheral surface is covered with the permalloy plate 16 is formed. This allows
A magnetic shield space that is doubly covered by the permalloy plate 16 of the outer box 11 and the permalloy plate 16 of the inner box 12 is formed. As described above, according to the present embodiment, instead of covering the outer peripheral surface and the inner peripheral surface of the structural frame with the permalloy plate to form a double structure, the inner box covered with the permalloy plate is covered with the permalloy plate. Since the double structure is realized by storing in a closed outer box, all standard products can be formed at low cost.

Further, according to the present embodiment, it is possible to bring the members into the site where the magnetic shield room is installed and assemble them on site, so that the magnetic shield room can be installed quickly and at low cost. You can Further, it is possible to easily cope with changes in the size and shape of the magnetically shielded room on site. In addition, when arranging the permalloy plates, the surplus part is released in the direction in which the permalloy plates are arranged, or the permalloy plates are stacked on top of each other so that they can be used without processing the permalloy plates of the same shape on site. .

The outer box opening and the inner box opening are closed by the sliding doors covered with the permalloy plate. Since each sliding door has a size that overlaps the wall surface around the opening, the sliding door is surely secured. The opening can be closed. Since each rail that slidably holds each sliding door can also use a standard aluminum sash member, it can be easily and inexpensively formed.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above embodiment, the magnetically shielded room is covered with the double magnetic shield material by the permalloy plate of the outer box and the permalloy plate of the inner box. May be covered with. By covering with a multi-layered magnetic shield material, the magnetic shield can be more effectively shielded. For example, as shown in FIG. 15, the inner box 12 is surrounded by two outer boxes 11, 11 '. The inner box 12 is composed of an inner box mold 30 covered with a permalloy plate 16, the inner outer box 11 is composed of an outer box mold 15 covered with a permalloy plate 16, and an outer outer box 1
Reference numeral 1'includes an outer box frame 15 'covered with a permalloy plate 16, and the triple permalloy plate 16 covers the magnetic shield space.

Further, in the above embodiment, when the permalloy plate is attached to the inner box wall frame and the outer box wall frame, the surplus portion is projected in one direction to escape, and the inner box floor frame, the outer box floor frame, When laying the permalloy plates on the inner box ceiling frame and the outer box ceiling frame, the overlapping amount was adjusted so that the permalloy plates did not project to the outside of the frame, but the surplus parts of the permalloy plates on each surface are shown in FIG. If it is projected as shown in the figure, the permalloy plate can be attached to all the surfaces by the same method.

That is, the permalloy plate 60 of the floor frame on the lower side of FIG. 16A projects and escapes the surplus portion in the frontward and rightward directions, and the permalloy plate 6 of the wall frame on the front side of FIG. 16A is released.
2 protrudes the surplus part in the upper direction and the left direction to let it escape,
6 (a) The permalloy plate 64 of the right wall frame projects and releases the surplus portion in the upward and leftward directions, and the permalloy plate 66 of the wall frame on the other side in FIG. 16 (a) removes the surplus portion in the downward and leftward directions. 16 (a), the permalloy plate 68 on the right side wall frame in FIG. 16 (a) projects and escapes the excess portion in the downward and leftward directions, and the permalloy plate 70 in the ceiling frame on the upper side in FIG. 16 (a) indicates the left and right sides. The surplus part is projected and released in the direction.

In the above embodiment, the permalloy plate is attached to the composite panel with screws, but it may be attached with an adhesive or the like. Further, in the above-mentioned embodiment, although permalloy (μ metal) is used as the magnetic shield material, other high magnetic permeability materials such as steel plate, pure iron, silicon steel plate, and amorphous magnetic material may be used.

Further, although the magnetic shield room of the above-mentioned embodiment has a box shape, it is not limited to a box shape and may have another shape.

[0058]

As described above, according to the present invention, the inner box having the inner box form which defines the magnetic shield space, and the magnetic shield material which covers each surface of the inner box form, and the inner box is surrounded. Since the outer box form has each surface separated from each surface of the inner box by a predetermined distance, and the outer box having a magnetic shield material covering each surface of the outer box form, all are standard products. Can be formed at low cost.

Further, according to the present invention, the outer box floor frame covered with the magnetic shield material is placed in the installation area where the magnetic shield room is installed, and the magnetic shield is separated from the outer box floor frame by a predetermined distance. The inner box floor frame covered with the material is placed, the inner box wall frame covered with the magnetic shield material is installed at the edge of the inner box floor frame, and the inner box wall frame is covered with the magnetic shield material. By installing the inner box ceiling frame, the inner box that defines the magnetic shield space is formed, and the outer box wall frame covered with the magnetic shield material is installed on the edge of the outer box floor frame. By installing an inner box ceiling frame covered with a magnetic shield material to form an outer box that surrounds the inner box and assemble a magnetic shield room, bring the members to the site where the magnetic shield room is installed. Every
It can be assembled on-site, and the magnetically shielded room can be installed quickly and inexpensively.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a magnetically shielded room according to an embodiment of the present invention.

FIG. 2 is a diagram showing an internal structure of a magnetically shielded room according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a structure of each frame of the magnetically shielded room according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of how to attach the permalloy plate to the outer box wall frame or the inner box wall frame of the magnetic shield room according to the embodiment of the present invention.

FIG. 5 is a process diagram (1) showing the method for assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 6 is a process diagram (2) showing the method for assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 7 is a process diagram (3) showing the method for assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 8 is a process diagram (4) showing the method for assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 9 is a process diagram (5) showing the method of assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 10 is a process diagram (6) showing the method of assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 11 is a process diagram (7) showing the method for assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 12 is a process diagram (8) showing the method of assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 13 is a process diagram (9) showing the method of assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 14 is a process view (10) showing the method of assembling the magnetic shield room according to the embodiment of the present invention.

FIG. 15 is a diagram showing an internal structure of a magnetically shielded room according to another embodiment of the present invention.

FIG. 16 is a schematic diagram for explaining a method of attaching a permalloy plate in a magnetically shielded room according to still another embodiment of the present invention.

FIG. 17 is an explanatory view in which a part of a conventional magnetic shield room is broken.

[Explanation of symbols]

 10 ... Magnetically shielded room 11 ... Outer box 12 ... Inner box 13 ... Outer box sliding door 14 ... Inner box sliding door 15 ... Outer box formwork 16 ... Permalloy plate 17 ... Outer box floor frame 18 ... Outer box wall frame 19 ... Outer box ceiling Frame 21 ... Floor surface 22 ... Soft rubber sheet 23 ... Composite panel 24 ... Aluminum plate 26 ... Outer box opening 27 ... Sliding door frame 28 ... Upper rail 29 ... Lower rail 30 ... Inner box formwork 31 ... Inner box floor frame 32 ... Inside Box wall frame 33 ... Inner box ceiling frame 34 ... Base 37 ... Inner box opening 38 ... Sliding door frame 39 ... Upper rail 40 ... Lower rail 41 ... Outer box floor 42 ... Inner box floor 50 ... Frame 52 ... Aluminum aggregate 100 ... Magnetically shielded room 102 ... Structural frame 104 ... Permalloy plate 106 ... Door

Claims (8)

[Claims] 1. An inner box having an inner box formwork defining a magnetically shielded space, and a magnetic shield material covering each surface of the inner box formwork; A magnetically shielded room, comprising: an outer box mold spaced apart from each surface by a predetermined distance; and an outer box having a magnetic shield material covering each surface of the outer box mold. 2. The magnetic shield room according to claim 1, wherein a plurality of shield plates each having a predetermined area are arranged on the respective surfaces of the inner box mold and the outer box mold without a gap enough to the magnetic shield. A magnetic shield room characterized by being covered with a shield plate assembly. 3. The magnetic shield room according to claim 2, wherein a surplus portion of the shield plate assembly that is larger than a wall surface of the inner box mold and a wall surface of the outer box mold has a predetermined direction of each wall surface. The magnetically shielded room is characterized by protruding to the. 4. The magnetic shield room according to claim 1, wherein the outer box has a plurality of sets of the outer box formwork and the magnetic shield material, and the magnetic shield space is , A magnetically shielded room characterized by being shielded by three or more magnetic shield materials. 5. A first box for mounting an outer box floor frame covered with a magnetic shield material in an installation area for installing a magnetic shield room.
And a second step of placing an inner box floor frame covered with a magnetic shield material at a predetermined distance from the outer box floor frame, and a magnetic shield material on the edge of the inner box floor frame. Third step of forming an inner box defining a magnetic shield space by installing a covered inner box wall frame and installing an inner box ceiling frame covered with a magnetic shield material on the inner box wall frame By installing an outer box wall frame covered with a magnetic shield material at the edge of the outer box floor frame, by installing an inner box ceiling frame covered with a magnetic shield material on the outer box wall frame, And a fourth step of forming an outer box surrounding the inner box. 6. The method for assembling a magnetically shielded room according to claim 5, wherein the third step includes a step of installing an inner box wall frame at a peripheral portion of the inner box floor frame, and an upper end of the inner box wall frame. A step of installing an inner box ceiling frame in the inner box wall frame, a step of laying a plurality of shield plates of a predetermined area on the magnetic shield without a gap enough to the inner box wall frame; A step of laying a plurality of shield plates on the magnetic shield without a gap to a sufficient extent, and the fourth step, a step of installing an outer box wall frame at a peripheral portion of the outer box floor frame; A step of installing an outer box ceiling frame on the upper end of the box wall frame; a step of laying a plurality of shield plates of a predetermined area on the outer box wall frame without a gap enough to the magnetic shield; , Multiple shield plates with a certain area are sufficient for the magnetic shield. Assembling method of a magnetic shield room and having a gap without laid process every time. 7. The method for assembling a magnetic shield room according to claim 6, wherein when the plurality of shield plates are spread over the inner box wall frame,
The surplus part is projected in a predetermined direction of the inner box wall frame, and when the plurality of shield plates are spread over the outer box wall frame,
A method for assembling a magnetically shielded room, characterized in that the surplus portion is projected in a predetermined direction of the inner box wall frame. 8. The method for assembling a magnetically shielded room according to claim 4, further comprising: an outer box mold having the outer box floor frame, the outer box wall frame, and the outer box ceiling frame. A method for assembling a magnetically shielded room, comprising using a plurality of sets and shielding the magnetically shielded space with a magnetic shield material having three or more layers.