JP2564458Y2 - Magnetic shield room opening structure - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an opening of a magnetically shielded room in which each surface of a ceiling, a floor, and a wall is attached to an entrance opening of a magnetically shielded room composed of a sheet of a magnetically shielded material. Regarding the structure.

[Conventional technology]

In the medical field, when detecting a weak magnetic field of a living body, a magnetically shielded room that shields an external magnetic field is required. Also, in the field of physical measurement, when a magnetically shielded room that shields an external magnetic field is required to perform high-performance measurement, and in the field of handling electron beam and other charged particle beams, an external magnetic field is required. Magnetically shielded rooms may be required to eliminate the effects.

As described above, magnetic shield rooms may be required in various fields such as biomagnetic measurement using high-sensitivity magnetic sensors (SQUIDs), precision electronic devices such as electron microscopes, etc. The magnetically shielded room
For example, it is constituted by using a steel plate of a ferromagnetic material such as permalloy or silicon steel plate, or by using a magnetic shield panel in which a sheet made of a ferromagnetic material such as amorphous is adhered to a nonmagnetic material such as a veneer plate. Generally, ceilings, floors, and walls can provide sufficient shielding performance with such a ferromagnetic material, but no matter what the magnetically shielded room, an opening for entering and exiting is required. Therefore, it is not possible to make a completely sealed magnetically shielded room. Therefore, securing the shielding performance of the opening becomes a problem.

FIG. 5 is a view showing a conventional magnetic shield door used for an entrance opening of a magnetic shield room, wherein 21 is a wall, 22 is a door, 23 is a hinge, and 24 and 25 are magnetic shield materials.

As shown in FIG. 5, the entrance opening of the magnetically shielded room has conventionally been of a safe door type having a convex shape, and the opening is stepped so as to match the shape of the door, and a hinge is formed.
It is configured to support and open and close 23. This is to prevent magnetic leakage from the gap and to degrade the magnetic shield performance, and to achieve a high degree of sealing in structure.

[Problems to be solved by the invention]

However, since the above-mentioned conventional door of the entrance employs an opening / closing mechanism using a hinge, there is a problem that a gap is easily formed particularly on the side where the hinge is attached. Therefore, in order to prevent performance degradation due to such gaps, the door is made thicker so that there is no gap with a convex safe door type.
Dimensional accuracy must also be high. As a result, the weight of the door increases, and the hinges are also heavily equipped, which increases the cost and makes it difficult to use. Further, as shown in FIG. 5, a sheet of a magnetic shield material is connected on the inside to form a shield surface, so that it is necessary to bend the sheet in accordance with the convex shape. Moreover, when permalloy is used as the sheet, the performance of the permalloy is significantly degraded when mechanical or thermal stress is applied. Therefore, it is necessary to perform annealing after machining,
There is a problem that it takes time for construction.

As a method of compensating for such deterioration in performance, there is a case where a magnetic shield space is formed by making the entrance passage a maze type. However, in this case, waste of space is increased and this is economically problematic.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an opening structure of a magnetically shielded room that can prevent deterioration of shield performance with a simple structure.

[Means for solving the problem]

For this purpose, the present invention is a magnetic shield room opening structure in which each surface of the ceiling, floor and wall is made of a magnetic shield material sheet, and the entire front and back of the wall including the opening is integrated with a magnetic shield material sheet. And cover the entire front and back of the door integrally with a sheet of magnetic shielding material, move the door from the side of the opening to the front with the guide rail, and then guide it to close the opening and press and fix it By pressing the sheet on the wall surface and the sheet on the back of the door directly at a predetermined width along the periphery of the opening, the sheet on the shield layer is magnetically connected, and the sheet on the back of the wall is moved from the sheet on the back of the wall to the back of the door. And a surface shield layer connected from the sheet on the wall surface to the sheet on the door surface from the sheet on the front surface of the wall. Furthermore, as means for pressing and fixing, while attaching handles with rollers on both sides of the door,
A tapered engagement mechanism is provided on the opening side, and the roller and the engagement mechanism are configured to be engaged by turning the handle.

[Action]

In the opening structure of the magnetic shield room of the present invention, both the front and back surfaces of the door are integrally covered with a sheet of magnetic shielding material, the door is moved from the side of the opening to the front by the guide rail, and then the opening is closed. Since it is guided and fixed by pressing, there is no rotation like a hinge, so that the shield layer can be magnetically connected by bringing the wall around the opening into close contact with the door even if it is not a convex shape but a flat plate shape, Performance degradation can be prevented. Further, since the aperture handle with rollers is attached to both sides of the door as a means for pressing and fixing, the wall around the opening and the door can be kept sealed with an appropriate pressure. In addition, the two sheets of the magnetic shield layer can be formed by closely connecting the sheets on the back surface of the opening wall and the back surface of the door, and on the surface of the opening wall and the surface of the door, thereby improving the magnetic shielding performance. be able to.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a view showing one embodiment of an opening structure of a magnetically shielded room according to the present invention, FIG. 2 is a view showing an example of a configuration of an aperture handle with a roller, and FIG. 3 is a view showing a roller engaging portion. is there. In the drawing, 1 is a wall, 2 is a door, 4 and 5 are squeezing handles with rollers, 6 is an engagement groove, 7 is a roller, 8, 8 'and 8 "are guide rails, and 11 to 14 are sheets.

In FIG. 1, a wall 1 has a magnetic shielding material, for example, sheets 11 and 12 made of a magnetic material having a high magnetic permeability such as permalloy or amorphous attached to both sides thereof, and is integrally attached to the wall 1. This shows the state of viewing.
The aperture handles 4 and 5 are provided on the side of the opening.
Has an engagement groove 6 with which the roller 7 is engaged. Door 2
The magnetic shielding material sheets 13 and 14 are integrally attached to the front and back surfaces of the wall 1 and the aperture handles 4 and 5 with rollers are attached to both sides. By rotating, the roller 7 is engaged with and disengaged from the engagement groove 6 on the side surface of the opening. Door 2
The guide rails 8, 8 'and 8 "are used as guides, and the guide rails 8' and 8" are first moved along the guide rail 8 from the side of the opening of the wall 1 to the front (surface). The door 2 is guided so as to close the opening along "." In this state, the aperture handles with rollers 4 and 5 are rotated to fix the door 2 to the opening of the wall 1.

As shown in the front view of FIG. 2 (a) and the side view of FIG. 2 (b), the aperture handles with rollers 4 and 5 have a roller 7 at the tip of an arm integrated with the handle. Is engaged with the engagement groove 6. FIG. 3 (a) is a front view of the engaging groove.
And the side view is (b) in FIG. Since the roller 7 enters the engagement groove 6 from below, the lower side into which the roller 7 enters is slightly widened as shown in FIG. As shown, the degree of engagement of the roller 7 is increased as the aperture handle with roller is rotated in the direction A.

As shown in FIG. 1, sheets are provided on both sides of the wall 1 and the door 2.
When 11 to 14 are integrally attached, the sheet 12 on the front surface (outside) of the wall 1 and the sheet 13 on the back surface (inside) of the door 2 are directly pressed into contact with each other at a predetermined width along the periphery of the opening and magnetically connected. As a result, as a result, a backside shield layer composed of the sheet 11 on the backside of the wall 1 and the sheet 13 on the backside of the door 2 and a surface shield layer similarly composed of the sheet 12 on the surface of the wall 1 and the sheet 14 on the front side of the door 2 Two shield layers are configured. That is, since two shield layers are formed, high shielding performance can be ensured.

FIG. 4 is a view of the structure of the opening of the magnetically shielded room as viewed from the side, wherein reference numeral 15 denotes a hanger and 16 denotes a floor. As shown, the door 2 is hung by the hanger 15, and the guide rails 8, 8 ', 8 "
When the aperture handles 4 and 4 'with rollers are mounted vertically, the door 2 is pressed against the opening at two locations on both sides, so that the pressure averaged over the entire circumference is reduced. Therefore, the degree of adhesion between the door 2 and the wall around the opening can be increased, and deterioration of performance can be more effectively prevented. The guide rails 8, 8 ', 8 "may be mounted on the ceiling or on the wall as long as they are above the door.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, a single-plate door is used, but a safe-door type may be used as in the conventional case. This is because it can increase the adhesion than the conventional one using a hinge with a pressing type,
This is because the shield performance can be enhanced by forming two shield layers on the back surface and the front surface, so that deterioration of permalloy in the processed portion can be prevented by the high adhesion and the two-layer structure of the shield layer. In addition, it is possible to make it thin and compact without increasing its own weight as in the case of using a hinge. Further, the present invention may be applied to a magnetic shield material sheet attached to only one side, or may be applied to a sheet in which sheets are stacked in multiple layers to constitute a shield surface. Further, the guide rail is provided above the door, on the wall side, or on the ceiling side, but may be provided on the wall side or floor side below the door.

[Effect of the invention]

As is apparent from the above description, according to the present invention, the door covered with the sheet of the magnetic shielding material is moved from the side of the opening to the front by the guide rail, and then guided so as to close the opening. By pressing and fixing, the wall around the opening and the door are brought into direct pressure contact with a predetermined width to magnetically connect the sheets of the shield layer, so that the shield performance can be prevented from deteriorating with a simple structure, and the maze A magnetic shield can be constructed more economically than a mold that secures a magnetic shield space. Also, as a means for pressing and fixing,
Since the aperture handle with roller is attached to both sides of the door, the degree of adhesion can be enhanced, the front and back surfaces of the ceiling, floor, wall and door are made of magnetic shielding material sheets, the back of the opening wall and the back of the door, By pressing and connecting the sheet on the surface of the opening wall and the sheet on the surface of the door, shielding can be performed with two layers, and the shielding performance can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of an opening structure of a magnetic shield room according to the present invention, FIG. 2 is a view showing a configuration example of a throttle handle with a roller, FIG. 4th
The figure is a view of the opening structure of the magnetic shield room viewed from the side, and FIG. 5 is a view showing a conventional magnetic shield door used for the entrance opening of the magnetic shield room. DESCRIPTION OF SYMBOLS 1 ... Wall, 2 ... Door, 4 and 5 ... Handle with roller, 6 ... Engagement groove, 7 ... Roller, 8, 8 ', 8 "...
Guide rails, 11-14 …… Seats.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Sumio Mukaiyama 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Riki Yamamoto 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Inside (72) Inventor Toshiyuki Ishikawa 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yoshinori Nishiyama 2-161 Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (72) Inventor Yoshiharu Yahana 2- 16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Masatake Nakamura 2-6-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (56) Reference Literature Japanese Utility Model Showa 56-37681 (JP, U) Japanese Utility Model Showa 59-65195 (JP, U) Japanese Utility Model Showa 64-54399 (JP, U) 32397 (JP Y2) real public Akira 53-17049 (JP, Y2)

Claims (2)

(57) [Scope of request for utility model registration] 1. An opening structure of a magnetically shielded room in which each surface of a ceiling, a floor, and a wall is made of a sheet of a magnetic shielding material, and the entire front and back surfaces of the wall including the opening are integrally made of a sheet of a magnetic shielding material. By covering the entire front and back of the door with a sheet of magnetic shielding material, moving the door from the side of the opening to the front with the guide rail, and then guiding it to close the opening and pressing and fixing it The sheet on the wall surface and the sheet on the back surface of the door are directly pressed against the sheet on the back surface of the door with a predetermined width along the periphery of the opening to magnetically connect the sheets of the shield layer, and the sheet on the back surface of the wall is connected to the back surface of the door. An opening structure for a magnetically shielded room, comprising a back shield layer connected to a sheet and a front shield layer connected from a sheet on a wall surface to a sheet on a door surface. 2. A structure in which a handle with rollers is attached to both sides of the door, and a tapered engagement mechanism is provided on the opening side, and the roller and the engagement mechanism are engaged by turning the handle. The opening structure of a magnetically shielded room according to claim 1, wherein: