JP4746994B2 - Electromagnetic shield shutter - Google Patents

Description

  The present invention relates to an electromagnetic wave shield shutter, and more particularly, an electromagnetic wave that is used at an entrance and exit of an electromagnetic wave shield room that shields an electromagnetic wave, can be opened and closed at high speed when entering and exiting, and can effectively shield electromagnetic waves from entering. Related to shield shutter.

In recent years, electronic devices have been developed, and when the entire device is miniaturized with the digitization of the contents and the electronic devices are operated with minute electric power, the operation signal becomes finer. In some cases, the operation signal is disturbed by an interference radio wave transmitted from another electronic device or the like.
For this reason, in recent years, electronic devices do not cause harmful interference to the surrounding electronic devices, and so that electronic devices do not malfunction due to external interference. There is a growing need for shielding electromagnetic waves (electromagnetic wave shielding).

  For this reason, in such a situation, in recent years, semiconductor manufacturing factories, hospitals, and the like often use clean rooms and intensive care units as shield rooms in order to prevent malfunctions of devices. In this case, electromagnetic shielding especially at the door opening (the entrance / exit of the shield room) is regarded as important, and it is said that most of electromagnetic wave leakage in the shield room is concentrated on the door portion.

In addition, not only in semiconductor manufacturing factories and hospitals, for example, automobiles are becoming more and more electronic, and most automobiles are equipped with electronic devices. Therefore, it is necessary to inspect automobile electronic devices. In this case, the production line of the automobile has a production line for mass production. For this reason, inspection of electronic devices mounted on automobiles is being performed in an electromagnetic shielding room incorporated in a production line.
Here, the flow of the production line is set as fast as possible in order to increase the production efficiency. For example, the inspection is performed on the order of seconds. In order to maintain this flow of speed, the shutter for the entrance and exit of the electromagnetic shielding room must have an electromagnetic shielding structure and a structure that can be opened and closed in seconds.

As a conventional electromagnetic wave shielding shutter, there is one constituted by a metal slater connected vertically. In this type, it is difficult to open and close the shutter at a high speed on the order of seconds, for example, because the metal slatter has to be opened and closed and is heavy.
In addition, general sheet shutters, which are composed of soft sheet-like shutter curtains, can be opened and closed at high speed, have high durability and low cost conditions, but have an electromagnetic shielding function. Not.

  In the situation as described above, a shutter device using a sheet-like screen is known as an entrance / exit of a shield room (see, for example, Patent Document 1). In addition, a technique for closing a window portion of a shield room using a sheet-like electromagnetic shielding screen is also known (see, for example, Patent Document 2).

In this case, as shown in FIG. 17 or 18, the shutter device disclosed in Patent Document 1 is provided with a conductive fixing frame 115 around the entrance / exit 103 of the shield room 101, and is opposed to the fixing frame 115. A movable frame 129 is arranged, and a sheet-like shield screen 117 is arranged between the fixed frame 115 and the movable frame 129 so as to be movable up and down. The shield screen 117 is moved up and down by a shutter opening / closing device 119. The lower ends of the fixed frame 115 and the movable frame 129 are embedded in the recess 113 of the structural floor 111.
When the shield screen 117 is lowered and the entrance / exit 103 is closed, the entrance / exit 103 is shielded by automatically pressing the movable frame 129 against the fixed frame 115 by the press contact means constituted by the jack 135 and the support arm 127. In addition, leakage of electromagnetic waves at the doorway 103 is prevented.
In FIG. 17 and FIG. 18, for convenience of explanation, the reference numerals are added to the reference numerals in FIG.

Patent Document 2 discloses a conductive brush. As shown in FIG. 19, the conductive brush 210 in Patent Document 2 is used as the electromagnetic shielding blind 201 in the window 221 of the electromagnetic shielding chamber 219. However, the conductive brush 210 is configured to be used at the entrance / exit. . That is, in FIG. 19, a box 202 is provided above the window 221, and an electromagnetic wave shielding curtain 207 is accommodated in the box 202 so as to be wound or unwound. A case 217 having a U-shaped cross section is disposed on both sides and the lower side of the window 221 so as to wrap the electromagnetic wave shielding curtain 207. The conductive brush 210 described above is attached to the inner side surface of the case 217.
Here, the shielding of the window 221 is performed by pulling the lower end of the electromagnetic shielding screen 207 by hand and pushing it down into the case 217 below the window 221.
In FIG. 19, for convenience of explanation, the reference numerals are described by adding 200 to the reference numerals in FIG. 2, but the contents are exactly the same.

Japanese Patent Publication No. 6-46678.

JP 2002-118389 A.

However, in the shutter device disclosed in Patent Document 1, it is necessary to press the shield screen 117 against the conductive fixed frame 115 in order to shield the shield room 101 when the shield screen 117 closes the doorway 103. . Therefore, the movable frame 129 and a pressure contact means for pressing the movable frame 129 to the fixed frame 115 are required, and further, the structure becomes complicated, such as forming the recess 113 on the structure floor 111, resulting in an increase in cost.
Moreover, in order to open and close the shield screen 117, it must be performed by the shutter opening and closing mechanism 119, and it is difficult to mechanically open and close the sheet-like shield screen 117 at high speed. Furthermore, a two-step procedure is required, that is, a procedure for completely lowering the shield screen 117 and a procedure for pressing the movable frame 129 by driving the press contact means. There was an inconvenience that it could not respond to high-speed opening and closing corresponding to the order of

The conductive brush 210 in Patent Document 2 is formed of a core material and a film, and the film is formed of copper plating. On the other hand, the electromagnetic wave shielding curtain 207 is formed of a cloth and a film, and the film is formed of a metal such as aluminum.
For this reason, whenever the electromagnetic shielding screen 207 is opened and closed, the coating of the electromagnetic shielding screen 207 and the coating of the conductive brush 210 rub against each other. When it is necessary to frequently open and close the electromagnetic shielding screen 207 and, for example, on the order of seconds, there is a risk that the copper plating constituting each film and a metal such as aluminum rub against each other and peel off. And the shielding effect will fade.

Moreover, in order to close the electromagnetic shielding screen 207, the electromagnetic shielding screen 207 must be pulled down by hand, which is troublesome and inconvenient for high-speed opening and closing corresponding to the order of seconds. there were.
Further, when the above-described conductive brush 210 of Patent Document 2 is used for the entrance / exit of the electromagnetic shielding chamber 219, in addition to the above-described problem, the case 217 below the window 221 obstructs the passage, so that a car or the like It is difficult to enter the electromagnetic shielding room 219. If only the lower case 217 is embedded in the floor in order to pass a car or the like, dust or the like accumulates in the conductive brush 210 in the case 217 every time it passes, and the shielding effect cannot be obtained. In addition, the structure is complicated and the cost is high.
In addition, if dust or the like accumulates in the lower case 217 embedded in the floor, when the electromagnetic shielding screen 207 is pulled down by hand, it is caught in the middle due to the dust and cannot be completely closed, and the shielding effect is reduced. There was an inconvenience.

  The present invention has been proposed in order to improve the disadvantages of the above-described conventional example, and provides an electromagnetic wave shielding shutter capable of reliably obtaining an electromagnetic wave shielding effect with a simple configuration and capable of opening and closing at high speed. That is the purpose.

To achieve the above object, an electromagnetic wave shielding shutter according to the present invention is a electromagnetic wave shielding shutter provided on the entrance of an electromagnetic wave shielded room, and the electromagnetic wave shielding member electromagnetic wave shaped possible shielding sheet of the entrance, above the entrance A shield member opening / closing means provided at a portion for opening and closing the electromagnetic shielding member in a vertical direction, an opening / closing means support member provided at an upper portion of the doorway for supporting the shield member opening / closing means, and a lower surface of the opening / closing means support member; A pair of guide members made of a conductive member that spans the floor of the electromagnetic shielding room and guides both ends in the width direction of the electromagnetic shielding member when the electromagnetic shielding member is opened and closed.
The lower end of the electromagnetic wave shielding member, a side view perpendicular to the rod-like or tubular constantly accommodate the shape of the weight consisting of and provided the weight accommodating portion formed by Rutotomoni, the pair of guide members to the surface of the pre-Symbol electromagnetic wave shielding member Inclined at,
In the pair of guide members, an inclined guide groove for guiding both ends in the width direction of the electromagnetic wave shielding member is formed, and
The inclined guide groove is provided along the side wall outside the shield groove and the shield groove functioning as electromagnetic shielding when the opening is shielded by the electromagnetic shielding member. In addition, the electromagnetic wave shielding member has a two-stage structure including a narrow member moving groove portion that guides the guided member projecting from both ends of the lower end portion of the electromagnetic wave shielding member during the opening and closing operation of the electromagnetic wave shielding member ( Claim 1).

According to this invention, the electromagnetic wave shielding member moves up and down while being guided by the inclined guide member by the operation of the shielding member opening / closing means. The electromagnetic shielding shutter includes an electromagnetic shielding member, a shielding member opening / closing means, an opening / closing means supporting member, and a guide member, and the electromagnetic shielding member has a structure in which a weight is accommodated in a weight accommodating portion at a lower end thereof. . For this reason, the electromagnetic wave shielding shutter can be made simple and the cost can be reduced.
The electromagnetic wave shielding member is lowered along the inclined guide member. Even after the lower end reaches the floor surface, the electromagnetic wave shielding member is in contact with the guide member in an inclined state. As a result, the load of the weight and the load of the electromagnetic wave shielding member itself are placed along the inclined surface of the guide member, the electromagnetic wave shielding member is pressed against and closely contacts the guide member, and thereby both conduct. An electromagnetic wave shielding effect can be obtained with certainty.
Furthermore, as described above, the electromagnetic wave shielding member is formed into a sheet shape and the weight is accommodated in the weight accommodating portion at the lower end. Therefore, when the electromagnetic wave shielding member is lowered, a weight load is applied, and the operation is performed at a high speed. As a result, the electromagnetic shielding shutter can be opened and closed at high speed.
Further, the entrance / exit of the electromagnetic shielding room can be closed by a procedure of guiding the electromagnetic shielding member to the inclined guide member and lowering it by operating the shielding member opening / closing means. Therefore, also from this point, it can contribute to the high-speed opening and closing of the electromagnetic wave shielding shutter.
Further, the electromagnetic shielding shutter is opened and closed by raising and lowering the electromagnetic shielding member. During this raising and lowering, the guided member of the electromagnetic shielding member is guided to the member moving groove, and the electromagnetic shielding member is shielded when the opening is shielded. The two are brought into contact with each other by contacting the working groove. When moving through the guided member, the electromagnetic shielding member is not in contact with the shielding groove, so that it is possible to prevent wear due to contact, to operate quickly and reliably, and to improve the durability of the electromagnetic shielding member. Improvements can be made.

  Here, the shield member opening / closing means may include a drum around which the electromagnetic wave shielding member is wound, and a drum rotation driving mechanism that rotationally drives the drum to open and close the electromagnetic wave shielding member in the vertical direction. Item 2).

  For this reason, the electromagnetic wave shielding member can be wound up by rotating the drum by operating the drum rotation drive mechanism, and can be lowered at a high speed by the action of the weight, so that it can be easily wound up and down with a simple configuration. Work can be performed quickly and efficiently.

  The inclination of the pair of guide members may be a linear inclination in which the lower end protrudes outside the electromagnetic shielding room with respect to the upper end of the guide member.

  By doing so, the electromagnetic wave shielding member is guided by the linearly inclined guide member when the electromagnetic wave shielding member is opened and closed. Since the guide member is linearly inclined, the electromagnetic shielding member is easy to slip and can be opened and closed at high speed.

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Further, it provided with a vertical portion at an end portion of the lower pair of guide members as described above, wherein the tilt guide groove of the member moving groove width may be the width substantially the same groove for the shield (according in the vertical portion Item 4 ).

  Accordingly, since the lower end portion of the guide member is a vertical portion, when the electromagnetic wave shielding member is lowered, the weight load works in the vertical direction and functions to pull the electromagnetic wave shielding member downward. As a result, the electromagnetic wave shielding member is more strongly pressed against the sheet guide and reliable conduction is obtained, so that a more reliable shielding effect is obtained. In addition, since the width of the groove for moving the member and the width of the groove for shielding are substantially the same, the manufacture of each groove is easy.

Further, the electromagnetic wave shielding member described above includes a sheet-like sheet main body and a sheet-like conductive sheet attached to at least the electromagnetic wave shielding room side of the sheet main body, and the sheet main body including the conductive sheet the lower end of which may be a structure which is formed in cross section pouched the (claim 5).

  According to this, since the electromagnetic wave shielding member is formed of the sheet main body and the conductive sheet, when the electromagnetic wave shielding member requires a predetermined thickness, the thickness of the sheet main body and the conductive sheet can be reduced. As a result, compared with the case where the whole electromagnetic wave shielding member is formed with an electroconductive member, an expensive electroconductive member can be decreased and it can contribute to cost reduction.

  Here, you may comprise so that the conductive earthing | grounding member which contacts the above-mentioned electroconductive sheet and conduct | electrically_connects may be provided in the said electromagnetic wave shield room side of the above-mentioned opening / closing means support member.

  In this way, even if electromagnetic waves enter from the upper gap of the electromagnetic wave shielding member via the inside of the support member, the conductive member and the conductive sheet are electrically connected, so that the electromagnetic waves can be reliably shielded. it can. As a result, electromagnetic waves can be effectively prevented from entering from the upper gap of the electromagnetic wave shielding member.

Furthermore, it is good also as a structure which attached to the both ends of the width direction of the electroconductive sheet mentioned above the wave-shaped gather which consists of an electroconductive member and changes to an uneven shape over the full length of the length direction ( Claim 6 ).

  In this case, when the electromagnetic wave shielding member is pressed against the guide member due to the synergistic effect of the weight and the inclination of the guide member, the gathers are pressed against the guide member, so that the electromagnetic shield member contacts the guide member more strongly. An effect is obtained.

Further, the above-described weight in the weight accommodating portion may be integrally provided on the lower portion of the seat body via a flexible member such as a string or cloth ( Claim 7 ).

  In this case, when the lower end of the electromagnetic shielding member reaches the floor surface, the shielding member opening / closing means is stopped for a moment, and even when the electromagnetic shielding member is loosened, it is integrally attached to the lower end of the electromagnetic shielding member. Since the bendable member is pulled by the weight load, the electromagnetic wave shielding member is pulled. As a result, the slack of the electromagnetic wave shielding member is absorbed and the electromagnetic wave shielding member is stretched, and the electromagnetic wave shielding member is pressed against the guide member, and both are made conductive, so that electromagnetic waves can be prevented from entering and the shielding effect can be maintained. it can.

  Here, you may form the flexible member which suspends the weight mentioned above with an elastic member.

  In this case, when the lower end of the electromagnetic shielding member reaches the floor surface, the shielding member opening / closing means is stopped for a moment, and even when the electromagnetic shielding member is loosened, it is integrally attached to the lower end of the electromagnetic shielding member. The expansion / contraction member is pulled by the load of the weight, and the expansion / contraction member itself contracts, so that the electromagnetic wave shielding member is quickly and reliably pulled to absorb the slack, and the electromagnetic wave shielding member is tightly packed. As a result, since the electromagnetic wave shielding member is pressed by the guide member and both are conducted, the intrusion of electromagnetic waves can be prevented and the shielding effect can be maintained.

Further, the weight described above may be formed of a metal round pipe, and support rods may be provided on both ends of the weight so as to be coaxial with the weight, and each of the support rods may be used as the above-described guided member ( Claim 8 ).

  In this case, the weight is formed of a metal round pipe, and since this round pipe can use a commercially available one, procurement is easy. In addition, the round pipe can be easily processed, and by adjusting the length and diameter, it is possible to easily and flexibly cope with the size of the opening of the electromagnetic shielding room.

  Here, a sliding member having excellent sliding property may be provided in the above-described member moving groove portion, and a conductive grounding member having excellent conductivity may be attached to the sheet guide groove.

  In this way, when the support bar is guided to the member moving groove when the electromagnetic wave shielding member is moved up and down, it comes into contact with the sliding member having excellent slipperiness, so that smoother sliding is possible, and the electromagnetic wave shielding shutter has a high speed. Can be opened and closed. Further, when both ends gather of the conductive sheet is guided by the sheet groove, it is guided by being pressed against the conductive grounding member having excellent conductivity, so that a more reliable shielding effect can be obtained.

Further, the lower portion of the inner surface of the weight receiving unit described above may be equipped with cushioning member for absorbing a shock occurring when a weight as described above has reached the floor (claim 9).

  If it does in this way, an electromagnetic wave shielding member will be lowered | hung by the synergistic effect of rotation of a drum, and the load of a weight, and when a weight reaches | attains a floor surface, an impact will be absorbed by a buffer member. Therefore, the weight bounces off and collides with the guide member, and the guide member is not damaged, and the floor surface is not damaged by the impact when the weight reaches the floor surface. For this reason, the durability of the entire apparatus can be improved in this respect.

Furthermore, the inclination of the above-mentioned guide member, may be those the guide member central electromagnetic wave shield room arcuate bulging outward slope of (claim 10).
If it does in this way, since a guide member becomes a circular-arc-like inclination, the load of an electromagnetic wave shield member and a weight will be applied along the bulging side of a circular arc. As a result, since the electromagnetic wave shielding member is more closely pressed against the guide member, a more reliable electromagnetic wave shielding effect can be obtained.

Further, the inclination of the above-mentioned guide member, which may lower end portion of this the guide member as a configuration in which the inclined obtained protrudes inward (claim 11).

  If it does in this way, since the guide member becomes the inclination obtained by projecting the lower end part toward the inner side, the upper part of the electromagnetic wave shielding member is at a position (the upper part of the guide member) that protrudes greatly to the outer side of the electromagnetic wave shielding room. Be placed. That is, since the opening / closing means supporting member (supporting case) is disposed so as to protrude forward from the electromagnetic shielding room and the guide member, there is an advantage that it does not interfere with entering and exiting the electromagnetic shielding room.

  Since the present invention is configured and functions as described above, according to this, since a simple configuration of using a sheet-like electromagnetic shielding member and attaching a weight to the lower end portion and opening and closing in the vertical direction is adopted, electromagnetic waves are effectively used. In addition to being able to shield the electromagnetic shield member, the conventional lowering operation of the electromagnetic wave shielding member can be speeded up by the action of the weight, which makes it possible to open and close at high speed. Since the guide member is inclined, the sheet-like electromagnetic wave shielding member is supported by the guide member in the shielded state, so that the electromagnetic wave shielding effect can be further enhanced. An electromagnetic shielding shutter can be provided.

Hereinafter, an embodiment of an electromagnetic wave shielding shutter 10 according to the present invention will be described based on the accompanying drawings.
1 and 2 show a configuration in which an electromagnetic wave shield shutter (hereinafter simply referred to as “shield shutter”) according to the present invention is attached to an electromagnetic wave shield room 1. FIG.

1 and 2, the shield shutter 10 is disposed in front of an opening 1 </ b> A serving as an entrance / exit of the electromagnetic wave shield room 1, with its lower end portion protruding somewhat, and is used for shielding the entrance / exit of the electromagnetic wave shield room 1. It has been.
The electromagnetic wave shield room 1 is configured such that a shield member made of a metal film such as aluminum or a copper plate is attached to the inner surface of the room and the electromagnetic wave is shielded. Further, the floor 1B of the shield room 1 is a metal floor surface made of a conductive iron plate or the like.

  The shield shutter 10 includes a sheet 20 that is a sheet-like electromagnetic shielding member, a sheet opening / closing means 30 that is a shielding member opening / closing means that opens and closes the sheet 20 in the vertical direction, and an opening / closing means support member that supports the sheet opening / closing means 30. And a sheet guide 50 which is a pair of guide members for guiding the seat 20 when the seat 20 is opened and closed in the vertical direction, that is, when the seat 20 is raised and lowered.

  As shown in FIGS. 3 to 4A and 4B, the sheet 20 includes a sheet main body 21 made of synthetic resin such as polyester, ABS resin, polymer elastomer, or a metal fiber woven fabric, and the sheet. The conductive sheet 22 is fixed to the entire back surface of the main body 21 by, for example, sewing.

The conductive sheet 22 includes, for example, a sheet formed by performing chemical plating such as aramid fiber as a core material and performing metal plating treatment such as copper or aluminum on the surface thereof.
As for the thickness of the sheet 20 as described above, the total thickness of the sheet main body 21 and the conductive sheet 22 is finished within a range of 1 to 10 [mm], for example. The sheet 20 is disposed with the conductive sheet 22 facing the electromagnetic shield room 1 side. The conductive sheet 22 may be fixed to the sheet body 21 by adhesion.

Gathers 23 having a predetermined width made of the same material as that of the conductive sheet 22 are attached to both ends of the conductive sheet 22 in the width direction of the sheet 20 by, for example, sewing. The gathers 23 are formed in a wave shape, and the wave shape extends along the width direction of the conductive sheet 22 and extends over the entire length in the length direction of the conductive sheet 22.
As a result, the gathers 23 are strongly pressed by the sheet guide 50 formed of a conductive member, so that electromagnetic waves can be prevented from entering from the side of the sheet 20 and the conductivity is further improved.

  The upper end portion of the sheet 20 is fixed to the surface of the drum 31 with the conductive sheet 22 side being in contact with the surface of the drum 31 constituting the sheet opening / closing means 30 described above. At the lower end of the sheet 20, there is provided a folded portion 20 </ b> A that is a weight accommodating portion that is folded back so that the surface of the conductive sheet 22 faces the surface of the sheet main body 21. In the folded portion 20A, a cylindrical weight 24 and a main body portion (a portion excluding both end portions) of a support rod 25 which is mounted coaxially with the weight 24 and supports the weight 24 are wrapped. Yes. Here, both end portions of the support rod 25 project from the folded portion 20A to constitute a guided member described later. The folded portion 20A is formed in a cross-sectional bag shape as shown in FIG.

Thereby, the conductive sheet 22 and the above-described gather 23 can come into contact with the floor surface 1B at the tip of the folded portion 20A, and the gather 23 and the floor surface 1B are electrically connected. Here, the shape of the folded portion 20A is formed by integrally fixing the front end portion of the sheet 20 before folding, the sheet main body 21, and the conductive sheet 22 together by sewing or the like after folding. Has been.

The weight 24 is configured by a metal member such as an iron pipe, for example, and the support bar 25 is formed by an iron bar, for example. The weight 24 is shorter than the width of the sheet 20, and the support rod 25 is formed longer than the width of the sheet 20 and protrudes from both ends of the sheet 20 in the width direction. The projecting portions at both ends of the support bar 25 function as guided members when the seat 20 moves up and down.
Here, the weight 24 is set in accordance with the size of the seat 20 and a desired opening / closing speed, and is set in a range of, for example, 10 kg to 100 kg.

  With respect to the weight 24 and the support bar 25, both ends of the weight 24 are fixed to the support bar 25 by welding or the like so that the weight 24 does not move along the support bar 25 after the weight 24 is fitted into the support bar 25. ing. Further, the weight 24 and the support rod 25 are disposed along the width direction of the sheet 20 in the longitudinal direction.

  As shown in FIGS. 11 to 12, the folded portion 20A of the sheet 20 that wraps the weight 24 and the support rod 25 wraps the weight 24 at the center in the width direction and the main body of the support rod 25 at both ends in the width direction. It is squeezed so as to wrap the part, and is formed in a cross-sectional bag shape as described above.

Further, as shown in detail in FIG. 8 , the folded portion 20 </ b> A is integrally provided with a stretchable sheet 27 such as rubber which is a flexible member and a stretchable member by sewing or the like, and this stretchable sheet 27. Thus, the weight 24 and the main body of the support bar 25 are directly wrapped. For this reason, as shown in FIG. 10, even when the stop of the drum 31 is delayed even momentarily when the weight 24 reaches the floor surface 1B and the sheet 20 is slack, the load of the weight 24 is reduced after the drum 31 stops. Therefore, the elastic sheet 27 at the lower end of the sheet 20 is contracted, and accordingly, the sheet 20 is pulled and the slack is absorbed, and the sheet 20 can be stretched. Here, the bendable member is not limited to a stretchable member, and may be a string or a cloth.

  The sheet opening / closing means 30 described above includes a drum 31 that winds up and down the sheet 20 while fixing the upper end of the sheet 20, and a drum rotation drive that rotates the drum 31 to open and close the sheet 20 in the vertical direction. And a mechanism 32.

The drum 31 is formed in a round pipe shape with an iron plate or the like having a predetermined thickness, and is formed longer than the width of the sheet 20 by a predetermined dimension. The drum 31 is supported by a shaft member 33 and is rotatable via a bearing (not shown).
The drum rotation drive mechanism 32 includes a motor (not shown) and can be remotely operated by a control device (not shown). Further, the motor has such a performance that the seat 20 can be opened and closed at a high speed (for example, in the order of seconds). Further, the drum rotation drive mechanism 32 has a stopper function for stopping the sheet 20 from falling further when the sheet 20 reaches the floor surface 1B.

The drum 31 and the drum rotation drive mechanism 32 are provided inside the support case 40, and the support case 40 protrudes and is fixed to the upper part of the front wall 1 </ b> C of the electromagnetic shielding room 1. .
The support case 40 is formed in a duct shape having a substantially square cross section by bending a thin iron plate, for example. As shown in FIG. 1, the electromagnetic shield room 1 is formed to have a length over the entire width direction and is fixed to the front wall 1 </ b> C with a bolt or the like (not shown).

The drum 31 and the drum rotation drive mechanism 32 are fixed to the bottom plate 40A of the support case 40 by a bracket or the like (not shown).
A through hole 40 </ b> B for raising and lowering the seat 20 has a predetermined width dimension in the front portion (front side of the drum 31) of the bottom plate 40 </ b> A of the support case 40.

  In order to prevent electromagnetic waves from passing through the inside of the support case 40 and entering the electromagnetic wave shield room 1 from the through hole 40B of the bottom plate 40A, and to prevent the electromagnetic waves in the electromagnetic shield room 1 from leaking to the outside. 2, 5 and 6, a conductive brush 41, which is a conductive ground member, is attached.

The conductive brush 41 is formed by sandwiching a large number of brush materials 41B with a flat rectangular stop plate 41A formed of two thin steel plates or the like, and the stop plate 41A is formed on the lower surface of the bottom plate 40A of the support case 40. It is fixed by a plurality of mounting screws 42 (see FIG. 5) . The brush material 41B is made of the same material as the conductive brush 22.
Then, with the conductive brush 41 attached, the attachment position is set so that the tip portion of the brush material 41B comes into contact with the surface of the conductive sheet 22 with a predetermined contact pressure and the both 41B and 22 are conducted. ing.
For this reason, as indicated by an arrow E in FIG. 5, the electromagnetic waves entering through the gap above the sheet 20, that is, through the inside of the support case 40 are shielded.

As shown in FIG. 2, the sheet guide 50 is slanted between the support case 40 and the floor surface 1 </ b> B of the electromagnetic wave shield room 1.
That is, the sheet guide 50 is formed in a substantially U-shaped cross section with aluminum or iron having excellent conductivity, and is configured as a pair so as to surround both ends in the width direction of the sheet 20. And the width dimension of the sheet | seat 20 is formed in the dimension which can penetrate the through-hole 40B opened in 40 A of bottom plates of the support case 40. As shown in FIG.
The upper end of the sheet guide 50 is in contact with the lower end of the through hole 40B of the support case 40, and the lower end of the sheet guide 50 is in contact with the floor surface 1B.

The sheet guide 50 as described above is viewed from the side perpendicular to the surface of the sheet 20 at an angle of α ° with respect to the floor surface 1B, and the lower end protrudes outside the electromagnetic shutter room 1 with respect to the upper end of the sheet guide 50. It has a slope.
This angle α ° is set to an inclination of about 3 ° in the embodiment. However, for example, it is not limited to around 3 ° as long as it is within the range of 3 ° to 30 ° or around that.

As described above and as shown in FIGS. 10 to 11, the sheet guide 50 is formed in a substantially U-shaped cross section, and an inclined guide groove 50 </ b> A having a two-stage structure is formed therein.
That is, the inclined guide groove 50A includes a support rod guide groove 50B that is a member moving groove portion that guides both longitudinal ends of the support rod 25, and a sheet guide groove 50C that guides both widthwise ends of the sheet 20. It has a two-stage structure.

  The support rod guide groove 50 </ b> B is formed in front of the sheet guide groove 50 </ b> C formed on the electromagnetic wave shield room 1 side (back side) in a step difference higher than the sheet guide groove 50 </ b> C in FIG. 10. The widths of these grooves 50B and 50C are substantially the same. The support rod guide groove 50 </ b> B is formed to a depth that can accommodate the support rod 25.

As shown in detail in FIG. 7, the support rod guide groove 50 </ b> B is an upper extension line of the vertical portion 50 </ b> D that is formed at a part of the lower end portion of the slope and is perpendicular to the arc portion R that is continuous with the slope end portion. It extends to the position where it intersects. A sliding member 51 such as Teflon excellent in slipperiness is fixed to the support rod guide groove 50B by adhesion or the like.
Further, when the support bar 25 is guided in the support bar guide groove 50B, a gap S (see FIGS. 8 and 11) having a predetermined dimension is formed between the width direction both ends of the sheet 20 and the sheet groove 50C. The both ends in the width direction of the sheet 20 are in a state of floating from the sheet groove 50C.

As described above, the sheet guide groove 50C is formed on the electromagnetic wave shield room 1 side, and the sheet guide groove 50C is formed at the lower end portion of the inclination at the circular arc portion R formed at the inclined end portion. It extends to a position where it intersects with the upper extension line of the vertical portion 50D which is vertically continuous.
In addition, a gasket 52 having excellent conductivity is fixed to the sheet guide groove 50C by adhesion or the like.

Accordingly, when the sheet 20 is lowered, first, as shown by phantom lines in FIG. 7, the weight 24 of the folded portion 20A of the sheet 20 fed out from the drum 31 is used for the support bar via both ends of the support bar 25. The guide groove 50B is guided by the sliding member 51 to move to a portion reaching the vertical portion 50D. When the vertical portion 50D is reached, both end gathers 23 of the sheet 20 are guided by the sheet groove 50C. Therefore, the sheet guide groove 50 </ b> C functions for the first time when the opening / closing part 1 </ b> A is shielded by the sheet 20.
Further, the gathers 23 at both ends of the sheet 20 are guided by the vertical portion 50D of the sheet guide 50 at the same time that the support bar 25 is removed from the support bar guide groove 50B, and slides a small distance from there to the floor surface 1B. Therefore, it is possible to prevent wear as much as possible even by repeated raising and lowering.

Next, the operation of the shield shutter 10 configured as described above will be described.
Usually, various operations are performed in the electromagnetic wave shield room 1 while electromagnetic waves are shielded. At this time, the entrance / exit 1A of the electromagnetic wave shield room 1 is closed by the shield shutter 10.

When entering the electromagnetic shielding room 1, first, the rotational drive mechanism 32 of the sheet opening / closing means 30 is activated to rotate the drum 31 to wind up the sheet 20.
Then, both end gathers 23 in the weight 24 portion of the sheet 20 rise while being guided by the sheet groove 50C of the vertical portion 50D. From around the vertical portion 50D, the support rod 25 of the weight 24 is transferred to the support rod guide groove 50B, and thereafter, the support rod 25 is guided and wound up by the inclined support rod guide groove 50B.

  When the sheet 20 is raised, the tip of the brush material 41B of the conductive brush 41 comes into contact with the conductive sheet 22 of the sheet 20 and the both 22 and 41 are electrically connected. As a result, the upper end of the sheet 20, that is, the support Intrusion of electromagnetic waves from the inside of the case 40 is prevented.

When entering the electromagnetic wave shield room 1, the seat 20 is lowered by an operation reverse to the above, and the entrance / exit of the electromagnetic wave shield room 1 is closed.
That is, when the stopper function of the rotation drive mechanism 32 is operated to release the stopper, the sheet 20 wound up on the drum 31 slides down at a high speed due to the load of the weight 24. When the seat 20 starts to descend, the support rod 25 of the weight 24 is guided by the support rod groove 50 of the sheet guide 50, and in this state, it is lowered to reach the vertical portion 50D.

  When the sheet 20 is lowered to the vicinity of the vertical portion 50D, the support rod 25 is removed from the support rod guide groove 50B, and at the same time, both ends gathers 23 of the folded portion 20A are guided by the sheet groove 50C of the vertical portion 50D. It is lowered to surface 1B.

  When the weight 24 of the folded portion 20A reaches the floor surface 1B, the gathers 23 and the conductive sheet 22 of the folded portion 20A are pressed against the floor surface 1B by the weight 24, and the gap between the two 22, 1A is closed. In addition, the electromagnetic wave is prevented from entering through the gap.

When the stop of the drum 31 is delayed even momentarily when the weight 24 reaches the floor surface 1B, as shown in FIG. 9 , the seat 20 is loosened, but even after the drum 31 is stopped, the load of the weight 24 is reduced. Therefore, the elastic sheet 27 at the lower end of the sheet 20 is contracted. Accordingly, the sheet 20 is pulled to absorb the slack, and the sheet 20 is tightly packed.
As a result, the conductive sheet 22 of the sheet 20 is pressed against the sheet groove 50C of the sheet guide 50, and the both 22 and 50C are conducted, whereby both the widthwise ends of the sheet 20 and the lower end of the sheet 20 and the floor surface Intrusion of electromagnetic waves from the gap with 1B is prevented.

  And whenever it enters / exits the electromagnetic wave shield room 1, operation similar to the above is performed.

As described above, according to the shield shutter 10 in the above embodiment, the following effects can be obtained.
(1). The shield shutter 10 includes a seat 20, a drum 31, a drum rotation drive mechanism 32, a support case 40, and a sheet guide 50, and can be opened and closed simply by moving the seat 20 up and down along the inclined sheet guide 50. Since it becomes a structure, it can be set as a simple structure and can aim at reduction of cost.

(2). When the sheet 20 is lowered, the sheet 20 is pressed against the inclined sheet guide 50, and the sheet 20 is in contact with the sheet guide 50 in an inclined state even after the lower end reaches the floor surface 1B. As a result, since the load of the weight 24 and the load of the sheet 20 are applied to the inclined surface of the sheet guide 50, the sheet 20 is pressed against and closely contacts the sheet guide 50, and the conductive sheet 22 of the sheet 20 and the sheet of the sheet guide 50. Conductive groove 50C conducts. As a result, an electromagnetic wave shielding effect can be reliably obtained.

(3). Since the sheet 20 is formed into a sheet shape and the weight 24 is accommodated in the folded portion 20A at the lower end, the load of the weight 24 is applied when the sheet 20 is lowered, resulting in a high-speed lowering operation. The shutter 10 can be opened and closed at high speed.

(4). Since the sheet 20 is formed by the sheet main body 21 and the conductive sheet 22, when the sheet 20 requires a predetermined thickness, the thickness of the sheet main body 21 and the conductive sheet 22 can be reduced. . As a result, compared to the case where the entire sheet 20 is formed of a conductive member, it is possible to reduce the cost of the conductive member and contribute to the cost reduction.

(5). Since the lower end of the sheet 20 is a folded portion 20A in which the conductive sheet 22 and the gathers 23 are in contact with the floor surface 1B, when the sheet 20 is lowered and reaches the floor surface 1B, the conductive sheet 22 and The gathers 23 are brought into contact with the floor surface 1B and are conducted. As a result, intrusion of electromagnetic waves from between the sheet 20 and the floor surface 1B can be prevented.

(6). The shield member opening / closing means 30 is composed of a drum 31 and a drum rotation drive mechanism 32 for rotating the drum 31. The sheet 20 can be wound up by rotating the drum 31, and a high speed is achieved by the action of the weight. Therefore, it is possible to easily perform the hoisting and lowering work with a simple configuration.

(7). The ascending / descending operation of the sheet 20 is performed in one procedure, each of which is guided by the inclined sheet guide 50 by the operation of the drum 31 and the drum rotation drive mechanism 32, or just rolled up the sheet 20 by rotating the drum 31. Can be done. By adjusting the performance of the drum rotation drive mechanism 32 and the weight of the weight 24, the entrance / exit of the electromagnetic wave shield room can be opened / closed at high speed.

(8). When the seat 20 is moved up and down to open and close, when the seat 20 starts to descend, the support rod 25 of the weight 24 is guided by the support rod guide groove 50B to reach the vertical portion 50D, and is supported near the vertical portion 50D. Simultaneously with the removal of the rod 25 from the support rod guide groove 50B, the both end gathers 23 of the sheet 20 are guided to the sheet groove 50C and lowered to the floor surface 1B. Therefore, the gathers 23 at both ends of the conductive sheet 22 slide a small distance between the vertical portion 50D and the floor surface 1B, and wear can be reduced even when repeated raising and lowering, and the conductive sheet 22 and the gathers 23 are gathered. Durability can be improved.

(9). Since the lower end portion of the sheet guide 50 is formed in the vertical portion 50D, the weight 24 is lowered along the vertical portion 50D at the lower end portion of the sheet guide 50 when the sheet 20 is lowered. A load of 24 acts in the vertical direction and pulls the sheet 20 downward. As a result, the conductive sheet 22 of the sheet 20 is more strongly pressed against the sheet groove 50C of the sheet guide 50, and the conductive sheet 22 and the sheet groove 50C are surely conducted to obtain a more reliable shielding effect.

(10). When the weight 24 at the lower end of the sheet 20 reaches the floor surface 1B, if the stop of the drum 31 is delayed even for a moment, the sheet 20 is slackened. Since the sheet 27 is attached, the elastic sheet 27 is contracted after the drum 31 is stopped, so that the slack of the sheet 20 is absorbed and the sheet 20 is stretched. As a result, the gathers 23 attached to the conductive sheet 22 are pressed against the sheet groove 50C of the sheet guide 50, and both are conducted, and as a result, a reliable shielding effect can be obtained.

(11). Since the conductive brush 41 is provided on the electromagnetic shielding room 1 side of the support case 40 so as to come into contact with the conductive sheet 22, even if electromagnetic waves enter from the upper gap of the sheet 20 through the support case 40. The conductive brush 41 and the conductive sheet 22 are shielded. As a result, intrusion of electromagnetic waves from the upper gap of the sheet 20 can be prevented.

(12). A sliding member 51 is provided in the support groove 50B for the support rod, and a conductive gasket 52 is provided in the groove 50C for the sheet. When the support rod 25 is guided into the guide groove 50B for the support rod when the seat 20 is raised and lowered, Since it contacts with the member 51, smoother slipping is possible, and there is an advantage that it is possible to effectively cope with the high-speed opening / closing operation of the electromagnetic wave shielding shutter 10. Further, when the gathers 23 of the conductive sheet 22 are guided to the sheet groove 50C, they are guided by being pressed against the conductive member 52, so that a more reliable shielding effect can be obtained.

Next, a second embodiment of the present invention will be described based on FIG.
The shield shutter 10A shown in FIG. 12 is obtained by forming the sheet guide 50 in the shutter 10 of the first embodiment described above into an arcuate sheet guide 60 bulging somewhat outward.

  As shown in FIG. 12, the sheet guide 60 has an arc-shaped slope whose central portion swells outside the electromagnetic wave shield room 1. The above-described arc shape is characterized in that it is formed in an approximate arc along the substantially 3 ° linear inclination of the sheet guide 50 of the first embodiment described above.

The lower end of the sheet guide 60 described above is in a state where arcs are continuous, and the vertical portion 50D of the sheet guide 50 in the first embodiment described above is not formed.
Such a sheet guide 60 includes an arc-shaped support bar groove 60B and an arc-shaped sheet groove having the same structure as the support bar guide groove 50B and the sheet groove 50C of the sheet guide 50 in the first embodiment. 60C is formed.
Other configurations, operations, and functions are the same as those in the first embodiment.

According to the shutter 10A of the second embodiment configured as described above, the same operation as that of the above-described first embodiment, that is, the above-described (1) to (7) and (10) to (12). ), And the following effects can be obtained.

(13). Even if there is no vertical portion 50D as in the first embodiment described above, the load of the weight 24 acts on the base point side of the arc, so that the sheet 20 is more strongly pressed against the sheet guide 60 and conduction is obtained. Thus, it is possible to effectively prevent electromagnetic waves from entering from the side surface and the lower end of the sheet 20.

Next, a third embodiment of the present invention will be described with reference to FIG.
In the shutter 10B in the third embodiment shown in FIG. 13, the inclination of the sheet guide 70 is an inclination obtained by projecting the lower end portion of the sheet guide 70 toward the inside, that is, toward the electromagnetic wave shield room 1 side. It has a configuration.
For this reason, in this 3rd Embodiment, since the outer side of the sheet | seat 20 becomes a form hold | maintained at the sheet | seat guide 50, it has the structure by which the whole shield room 1 containing the support case 71 is electromagnetically shielded.
Hereinafter, the characteristic part will be described.

First, in the shutter 10 </ b> B, the support case 71 has a shape that protrudes farther forward than the support case 40 in each of the first and second embodiments described above, and the drum 31, A drum rotation drive mechanism 32 is disposed.
The conductive sheet 22 of the sheet 20 is directed to the side opposite to the electromagnetic wave shield room 1, and the conductive brush 41 is attached to the lower surface side of the shield member opening / closing means 30 in the support case 71. The conductive brush 41 is positioned so as to be in constant contact with the conductive sheet 22 and attached to the side opposite to the electromagnetic shielding room 1.

The seat guide 70 has a support rod guide groove 70B having the same structure as that of the tilt guide 50A of the support guide guide groove 50B and the seat groove 50C of the seat guide 50 according to the first embodiment, although the tilt direction is different. And an inclined guide 70A composed of a sheet groove 70C (see FIG. 13) .

  Here, the sheet 20 is guided by the sheet guide 70 and wound around the drum 31, and in the case 71, a through hole 71 </ b> B through which the sheet 20 is inserted is opened on the electromagnetic wave shield room 1 side of the sheet 20. .

As described above, in the sheet 20, the conductive sheet 22 is directed to the electromagnetic shielding room 1 side, and the sheet guide 70 is inclined to the opposite side (outside) of the electromagnetic shielding room 1 (see FIG. 13). In the sheet 20, the sheet main body 21 is guided to the support rod guide groove 70B of the inclined guide 70A via the support rod 25, and the conductive sheet 22 is guided and brought into contact with the sheet groove 70C. Become.
Further, the lower end of the sheet guide 70 has the front end 70E on the electromagnetic wave shield room 1 side removed, and the remaining front end is disposed at a position along the extension line on the side surface on the indoor side of the front wall 1C.
Other configurations, operations and functions thereof are the same as those of the electromagnetic shielding shutter 10 in the first embodiment described above.

According to the electromagnetic wave shielding shutter 10B configured as described above, the same effects as the above-described (1) to (12) can be obtained, and further, the following effects can be obtained.
(14). By deleting the tip 70E of the sheet guide 70, when the inclination angle α1 ° of the sheet guide 70 is the same, the protrusion dimension of the case 71 from the electromagnetic shielding room 1 is smaller than in the configuration in which the tip 70E is not deleted. can do.

(15). In the shield shutter 10B, the support case 71 is formed in front of the electromagnetic wave shield room 1 and protrudes forward from the sheet guide 70. Therefore, the shield shutter 10B is less likely to obstruct traffic and the like than when the sheet guide 70 protrudes. . The support case 71 can also reduce the influence of outside, for example, wind and rain.

In addition, this invention is not limited to each embodiment mentioned above, All the deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.
For example, in the first to third embodiments, the supporting rod guide groove 50B is provided with the sliding member 51 such as Teflon, and the seat groove 50C is provided with the gasket 52. However, the sliding member 51 and the gasket 52 are not necessarily provided. It does not have to be. However, by providing the members 51 and 52, the effect as described in (12) can be obtained.

In each of the first to third embodiments, the support rod guide groove 50B is provided with a sliding member 51 such as Teflon, and the support rod 25 of the weight 24 slides on the sliding member 51. However, it is not limited to this. For example, as shown in FIG. 14, guide rollers 75 incorporating bearings are attached to both ends (projecting portions) of the support rod 25, and the support rod 25 is inserted into the support rod guide groove 50 </ b> B via the guide roller 75. You may make it roll both ends of.
In this way, the opening and closing of the seat 20 becomes smoother, and there is no problem even at high speed opening and closing. When the bearing 75 is used, the sliding member 51 such as Teflon may be left as it is or may be omitted.

Further, in each of the first to third embodiments, the conductive brush 41 is formed by sandwiching the brush material 41B between the two stop plates 41A, but the present invention is not limited to this.
For example, using the same material as the conductive sheet 22 of the sheet 20, as shown in FIGS. 15A and 15B, a strip-shaped brush 77 including a main body 77 </ b> A and a brush portion 77 </ b> B is formed. May be attached to the lower surface of the support case 40.

In each of the first to third embodiments, the stretchable sheet 27 is integrally attached to the inner side of the folded portion 20A of the sheet 20, and the weight 24 is wrapped with the stretchable sheet 27. As shown in FIG. A buffer member 79 may be provided between the elastic sheet 27 and the folded portion 20A.
In this way, the conductive sheet 22 of the sheet 20 can be uniformly pressed to the floor surface 1B with poor flatness, and conduction with the floor surface 1B can be obtained, and as a result, more reliably. Invasion of electromagnetic waves can be prevented. Moreover, since the sheet 20 is lowered at a high speed and the impact when the weight 24 reaches the floor surface 1B can be absorbed, damage to the floor surface 1B can be reduced.

Further, in each of the first to third embodiments, the sheet 20 is formed by one sheet body 21 and the conductive sheet 22, and the weight 24 integrated with the support rod 25 is provided at the lower end. However, the present invention is not limited to this, and a reinforcing bar member may be provided at the upper end and the middle of the sheet 20 separately from the support bar 25.
In this way, even when the wind and rain are strong, there will be no major hindrance to opening and closing.

  Further, in the shutter 10A of the second embodiment described above, the central portion of the sheet guide 70A has an arcuate inclination that bulges outside the electromagnetic wave shield room 1, but this is not restrictive. The central portion of the sheet guide 70 </ b> A may have an arcuate inclination that bulges inside the electromagnetic wave shield room 1.

Further, in the above-described third embodiment, the position of the drum 31 is arranged outside the sheet 20, but not limited to this, the opposite side of the drum 31 in the third embodiment with the sheet 20 interposed therebetween, that is, You may arrange | position the drum 31 in the symmetrical position of the electromagnetic wave shield room 1. FIG. In this case, the outer diameter of the drum 31 coincides with the tangent line of the sheet 20.
If it does in this way, the protrusion amount from the electromagnetic wave shield room 1 of case 71 can be decreased more.

  In each of the first to third embodiments, the shutter 10 and the like are provided on the floor surface 1B of the electromagnetic wave shield room 1 and are configured integrally with the electromagnetic wave shield room 1. However, the present invention is not limited to this. For example, the shutter 10 etc. can be comprised independently, and can also be attached with respect to the existing electromagnetic wave shield room by retrofit.

  The present invention can be used for all doorways when entering and exiting the electromagnetic shielding room from the outside.

1 is an overall perspective view showing a first embodiment of an electromagnetic wave shielding shutter according to the present invention. It is a longitudinal cross-sectional view along the AA line of FIG. It is a front view which shows the electromagnetic wave shielding member of embodiment disclosed in FIG. 4A and 4B are diagrams illustrating a part of the electromagnetic wave shielding member disclosed in FIG. 3, in which FIG. 4A is a partial side surface portion viewed from an arrow B in FIG. 3, and FIG. FIG. It is a fragmentary sectional view which shows the detail of the drum vicinity of the electromagnetic wave shield shutter disclosed in FIG. It is a top view which shows the electroconductive brush with which the electromagnetic wave shield shutter disclosed in FIG. 1 was equipped. It is detail sectional drawing which shows a part of intermediate part and lower end part of the electromagnetic wave shield shutter disclosed in FIG. FIG. 2 is a detailed cross-sectional view illustrating a lower end portion of the electromagnetic wave shielding shutter disclosed in FIG. 1. It is a detailed fragmentary sectional view which shows the state before the weight of the lower end part of the electromagnetic wave shield shutter disclosed in FIG. 1 functions. It is sectional drawing along the DD line of FIG. It is sectional drawing along the EE line of FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the electromagnetic wave shield shutter which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the electromagnetic wave shield shutter which concerns on this invention. It is explanatory drawing which shows the modification of the support rod part of the weight of the electromagnetic wave shielding shutter which concerns on this invention. It is a figure which shows the other example of the electroconductive brush of the electromagnetic wave shield shutter which concerns on this invention, FIG. 15 (A) is a top view which shows the electroconductive brush, FIG.15 (B) is a top view of FIG. is there. It is a fragmentary sectional view which shows the other example of the weight vicinity of the electromagnetic wave shielding shutter which concerns on this invention. It is a front view which shows a prior art example. It is a longitudinal cross-sectional view along the FF line of FIG. It is explanatory drawing which shows the window using the conductive brush of the electromagnetic wave shield room which concerns on another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic wave shield room 1A Opening part 10, 10A, 10B which is an entrance / exit The electromagnetic wave shielding shutter 20 Sheet | seat 20A as an electromagnetic wave shielding member Folding part 21 as a weight accommodating part Sheet main body 22 Conductive sheet 23 Wave-shaped gather 24 Weight 25 Support rod 27 Elastic members (flexible sheets) as flexible members
30 Shield member opening / closing means 31 Drum 32 constituting shield member opening / closing means Drum rotating mechanism 40 constituting shield member opening / closing means Support case 41 as opening / closing means support member Conductive brushes 50, 60, 70 as conductive grounding members Guide Sheet guides 50B, 60B, 70B as members Guide rod grooves 50C, 60C, 70C as groove portions for moving members Sheet guide grooves 50D, 70E as shield grooves, vertical portions 51, sliding members 52, conductive ground members gasket

Claims (11)

An electromagnetic shielding shutter provided at the entrance and exit of the electromagnetic shielding room,
A sheet-like electromagnetic shielding member capable of shielding electromagnetic waves at the entrance and exit; shielding member opening and closing means provided above the entrance and exiting the electromagnetic shielding member in the vertical direction; and the shield provided above the entrance and exit An opening / closing means supporting member for supporting the member opening / closing means, and spanning between the lower surface of the opening / closing means supporting member and the floor surface of the electromagnetic shielding room, and both ends of the electromagnetic shielding member in the width direction when the electromagnetic shielding member is opened / closed A pair of guide members made of a conductive member for guiding
The lower end of the electromagnetic wave shielding member, a side view perpendicular to the rod-like or tubular constantly accommodate the shape of the weight consisting of and provided the weight accommodating portion formed by Rutotomoni, the pair of guide members to the surface of the pre-Symbol electromagnetic wave shielding member Inclined at,
In the pair of guide members, an inclined guide groove for guiding both ends in the width direction of the electromagnetic wave shielding member is formed, and
The inclined guide groove is provided along the side wall outside the shield groove and the shield groove functioning as electromagnetic shielding when the opening is shielded by the electromagnetic shielding member. An electromagnetic wave characterized in that the electromagnetic wave shielding member has a two-stage structure with a narrow member moving groove portion that guides the guided member projecting from both ends of the lower end portion of the electromagnetic wave shielding member when the electromagnetic wave shielding member is opened and closed. Shield shutter. In the electromagnetic wave shielding shutter according to claim 1,
The electromagnetic wave shield characterized in that the shield member opening / closing means comprises a drum around which the electromagnetic wave shield member is wound, and a drum rotation drive mechanism for rotating the drum to open and close the electromagnetic wave shield member in the vertical direction. shutter. In the electromagnetic wave shielding shutter according to claim 1 or 2,
An electromagnetic wave shielding shutter, wherein the pair of guide members are inclined with respect to the upper end of the guide member in a linear inclination with a lower end protruding outside the electromagnetic shielding room. In the electromagnetic wave shielding shutter according to claim 1,
Provided with a vertical portion at an end portion of the lower of the pair of guide members, electromagnetic waves, characterized in that the width of the member moving groove of the inclined guide groove and the width and same of the groove for the shield in the vertical portion Shield shutter. In the electromagnetic wave shielding shutter according to any one of claims 1 to 4 ,
The electromagnetic shielding member includes a sheet-like sheet body and a sheet-like conductive sheet attached to at least the electromagnetic shielding room side of the sheet body,
An electromagnetic wave shielding shutter, wherein a lower end portion of the sheet body including the conductive sheet is formed in a cross-sectional bag shape. In the electromagnetic wave shielding shutter according to claim 5,
An electromagnetic wave shielding shutter, wherein gathers made of a conductive member and formed into a corrugated shape that changes in a concavo-convex shape are attached to both ends in the width direction of the conductive sheet over the entire length in the length direction. In the electromagnetic wave shielding shutter according to any one of claims 1 to 6,
An electromagnetic wave shielding shutter characterized in that a weight in the weight housing portion is integrally suspended from a lower portion of the sheet body via a flexible member such as a string or cloth. In the electromagnetic wave shielding shutter according to claim 1 ,
The weight is formed of a metal round pipe, and support rods are provided on both ends of the weight on the same axis as the weight.
An electromagnetic wave shielding shutter, wherein each of the projecting support bar portions is the guided member. In the electromagnetic wave shielding shutter according to claim 7 or 8 ,
An electromagnetic wave shielding shutter comprising a buffer member that absorbs a buffer generated when the weight reaches the floor surface at a lower portion of the inner surface of the weight storage unit. In the electromagnetic wave shielding shutter according to claim 3,
Electromagnetic shielding shutter, characterized in that the inclination of the guide member, the central portion of this said guide member has a bulging arc-like inclined outwardly of the electromagnetic wave shielding room. In the electromagnetic wave shielding shutter according to any one of claims 1 to 9 ,
The guide inclined member, electromagnetic wave shielding shutter, characterized in that the lower end of this said guide member and an inclination obtained by projecting inward.

Images