Electromagnetic shield panel mounting structure

Abstract

To provide a mounting structure of an electromagnetic shield panel that can maintain shielding performance even in an electromagnetic shield room installed on building floors where a horizontal deformation angle between layers reaches 1 / 100 during earthquakes.SOLUTION: When vertical furring strips 5 and 5 tilt in the arrow direction, there is a gap dimension a between a vertical edge end of a shield panel 9 and a vertical gauge line L in an initial state, so that the vertical furring strips 5 and 5 can tilt while the shield panel 9 remains immobile until a top end corner P2 point of the shield panel 9 contacts the vertical gauge line L. When the vertical furring strips 5 and 5 tilt further, screws of push edges lined up on the vertical gauge line L press the top of the vertical edge end of the shield panel 9, causing vertical stiffeners 7, 7, ..., which are integrated with the shield panel 9 to rotate around a bottom end O1 point, so that the vertical furring strips 5 and 5 can tilt until the top end corner P2 point of the shield panel 9 contacts an upper horizontal gauge line L.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an attachment structure for an electromagnetic shield panel (hereinafter referred to as a shield panel) in an electromagnetic shield room (hereinafter referred to as a shield room) installed inside a building, which enables the maintenance of electromagnetic shielding performance against horizontal deformation between the layers of the building caused by an earthquake. [Background technology]

[0002] An electromagnetic shield wall (hereinafter referred to as a shield wall) of a shield room, which electromagnetically separates the indoor and outdoor spaces with shield panels made of conductive material such as steel plates, will similarly attempt to deform horizontally in the event of horizontal inter-story deformation in the building containing the shield room due to an earthquake, if the upper and lower ends of the partition posts (vertical furring strips) supporting the shield wall are fixed to the building's frame.

[0003] In addition, shielded rooms may also be installed on upper floors, such as the second floor or higher, and since the horizontal deformation between stories due to an earthquake is greater on the upper floors of a building than on the basement floor or the first floor above ground, it is easy to predict that the horizontal deformation of the shield panel covering the shield wall will be greater.

[0004] One example of a technology for preventing electromagnetic wave leakage caused by large horizontal deformation between layers of a shielded room due to an earthquake is the invention described in Patent Document 1. Patent Document 1 discloses a joint structure in which gaps are secured between the edges of adjacent shielding members (shielding panels) on the top, bottom, left, and right sides in the shielding wall of an anechoic chamber, and the gaps are covered by sandwiching them between vertical and horizontal furring strips and a pressing edge via a shielding gasket.

[0005] As described above, the shielding member sandwiched between the vertical and horizontal furring strips and the pressure edge via the shielding gasket can slide and rotate within the surface of the shielding member within the set gap between the edge ends. Therefore, even if horizontal deformation between layers occurs in the radio wave anechoic chamber during an earthquake, the force is unlikely to act on the shielding member, so it can avoid damage and can maintain its function as a shielding wall even after the earthquake.

[0006] The shielding member (shielding panel) in the invention described in Patent Document 1 is a relatively small panel made by attaching a reinforcing plate to a thin steel plate or the like. Therefore, in order to construct a large shielding wall, a large number of vertical and horizontal furring strips and retaining edges are required, so there is room for improvement in terms of cost and construction time in the manufacture and construction of shielding panels. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 3830428 Summary of the Invention [Problem to be solved by the invention]

[0008] One way to reduce the cost and construction time in the manufacture and installation of shield panels is to increase the dimensions of each shield panel. However, increasing the dimensions of each panel not only increases the weight, but also increases the likelihood of bending deformation outside the shield panel surface.

[0009] Furthermore, if the enlarged shielding panel is attached directly to the studs supporting the shielding wall of the shielding room, the studs will tilt with the horizontal deformation between the building's floors because their upper and lower ends are fixed to the building's framework, causing distortion in the shielding panel covering the shielding room wall, making it difficult to maintain shielding performance.

[0010] The present invention provides a mounting structure for a shield panel that solves these problems and can maintain electromagnetic shielding performance even when a large horizontal deformation between stories of a building (for example, 1 / 100) occurs. [Means for solving the problem]

[0011] The means of the present invention for solving the above problem is to provide a shielded room on the floor of the building where the shielded room is installed. In the shield wall of the shield room, (1) A shield panel covering a shield wall, with a certain gap maintained between the edges of adjacent shield panels on the left and right, or adjacent left and right and top and bottom, and the gap is sandwiched and covered by vertical and horizontal furring strips and a pressure edge via a shield gasket. (2) The shielding panel is a metal conductor such as an iron plate glued to a reinforcing surface material such as gypsum board, and is attached to and integrated with vertical reinforcing materials such as light steel incorporated into a frame surrounded by the vertical and horizontal furring strips using screws, etc. (3) The upper and lower ends of the vertical furring strips are fixed to the framework of the building floor, and the upper and lower ends of the vertical reinforcement members are fixed to the horizontal furring strips installed near the floor and ceiling of the building floor, or and The horizontal furring strip is fitted unconstrained in the axial direction and vertical direction into a U-shaped groove metal fitting fixed to the upper floor, and a certain gap is maintained above the upper end of the vertical reinforcement material and between it and the bottom surface of the U-shaped groove metal fitting. The mounting structure for a shield panel is characterized by including the above configuration.

[0012] As described above, in the present invention, the shielding panel is attached to and integrated with vertical reinforcing materials such as light steel that are incorporated into a frame surrounded by the vertical and horizontal furring strips, and the upper and lower ends of the vertical reinforcing materials are fitted into U-shaped groove metal fittings fixed to the horizontal furring strips in an unconstrained state in the axial direction and vertical direction of the horizontal furring strips, and a certain gap is secured above the upper end of the vertical reinforcing materials.Therefore, even in the case of a large shielding panel whose finished height reaches roughly from floor to ceiling, if the frame consisting of the vertical and horizontal furring strips undergoes horizontal deformation, the shielding panel can rigidly rotate (rock) within the certain gap provided between the edges of adjacent shielding panels.

[0013] At this time, the gaps between the edges of the shielding panels are sandwiched and covered by the vertical and horizontal furring strips and the pressing edge via the shielding gasket, so even if the shielding panel rotates rigidly (rocking), the leakage of electromagnetic waves is prevented by the shielding gasket.

[0014] The second aspect of the present invention is a mounting structure for the shield panel, (1) The upper and lower ends of the vertical reinforcement members that reinforce the shield panel are fixed to the horizontal furring strips. or fixed to the floor and the upper floor The horizontal furring strip is fitted into the U-shaped groove metal fittings without being constrained in the axial direction or the vertical direction, and a certain gap is maintained between the top end of the vertical reinforcement material and the bottom surface of the U-shaped groove metal fittings. (2) The framework, consisting of vertical and horizontal furring strips with the vertical reinforcement members built in, is composed of at least two levels, upper and lower. The mounting structure for a shield panel is characterized by further including the above configuration.

[0015] When a high-ceilinged shielded room is installed on a building floor that is higher than normal, if the entire height of the shield wall is covered with only one shield panel, the shield panel will be long and heavy, causing problems in terms of transport and erection. However, if, as in the second aspect of the present invention, a framework consisting of vertical and horizontal furring strips with vertical reinforcement members built in to reinforce the shield panel is constructed in at least two levels, upper and lower, the shield panel will also be divided into two levels and will have smaller dimensions, thereby improving the ease of construction. [Effects of the Invention]

[0016] The present invention, which is based on the above means, has the following effects. (1) Even if the shield panel becomes larger and heavier, it is attached to and reinforced by vertical reinforcement members built into a frame surrounded by the vertical and horizontal furring strips of the shield wall, so deformation outside the panel surface is suppressed. (2) Even if the shield wall deforms horizontally due to horizontal deformation between the building's floors and the vertical furring strips tilt, a certain gap is secured above the upper end of the vertical reinforcement, the upper and lower ends of which are joined to the U-shaped groove metal fittings in an unconstrained state, and the shield panel integrated with the vertical reinforcement can rotate (rock) rigidly within the certain gap provided between the edges of adjacent shield panels. Therefore, the deformation-following effect due to this rotation is large, and the shield panel is prevented from being distorted and damaged. (3) The gaps between the edges of the shielding panels are sandwiched and covered by the vertical and horizontal furring strips and the pressure edge via a shielding gasket, so that leakage of electromagnetic waves can be prevented even if the shielding panel rotates (rocks). (4) From the above, the electromagnetic shielding performance can be maintained even if a large horizontal deformation between stories of the building (for example, 1 / 100) occurs. [Brief explanation of the drawings]

[0017] [Figure 1]1A and 1B are diagrams showing the framework that constitutes the shield wall W of the shield room 1 in an embodiment of the present invention, where (a) is an elevation view of the framework, (b) is a cross-sectional view taken along the line I-I of (a), and (c) is an enlarged cross-sectional view taken along the line RO-RO of (a). [Figure 2] 2A and 2B are diagrams showing the state in which shield panels 9, 9, ... are attached to the framework that constitutes the shield wall W in Figure 1, where (a) is an elevation view of the shield wall W as seen from inside the shield room 1, (b) is a cross-sectional view of I-I in (a), (c) is an enlarged cross-sectional view of RO-RO in (a), and (d) is an enlarged view of part A in (b), showing the state in which the clamping edge 11 is fastened to the horizontal furring strip 5 with screws 11a. [Figure 3] This is an explanatory diagram showing a state in which, in an embodiment of the present invention, the vertical furring strips 5, 5, ... are tilted due to horizontal interlayer displacement δH, causing the shielding panels 9, 9, ... to rotate and resulting in a lift of dimension δV at the lower ends of the vertical reinforcements 7, 7, .... [Figure 4] This is a schematic diagram that explains how one shield panel 9 behaves when the vertical furring strips 5, 5 are tilted. (a) is the initial state, and (b) shows the state in which the shield panel 9 remains stationary (no deformation), the vertical furring strips 5, 5 are tilted to the right (arrow) on the paper, and the vertical gauge line L is in contact with the upper corner P2 of the shield panel 9. [Figure 5] This is a schematic diagram of the behavior following Figure 4, where (c) shows the state in which the vertical furring strips 5, 5 are tilted further from the state in Figure 4(b), pushing and rotating the shield panel 9, with point P2 coming into contact with the upper horizontal gauge line L. (d) shows the state in which the vertical furring strips 5, 5 are tilted further from the state in (c), pushing the shield panel 9, causing it to slide sideways by dimension a, with point P1 at the lower corner of the shield panel 9 coming into contact with the vertical gauge line L. [Figure 6] This is a partial elevation view of a shield wall W, which consists of two layers of a frame consisting of vertical furring strips 5, 5 and horizontal furring strips 6, 6, with vertical reinforcement members 7, 7, ... incorporated, and is covered with two shield panels 9, 9, one above the other. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of the present invention will be described with reference to Figures 1 to 3. As shown in Figure 1, the shielded room 1 is surrounded by a shielded floor 2, a shielded ceiling 4 located below and adjacent to the underside of an upper floor 3, and shield walls W on all four sides. As shown in Figures 1(a) to 1(c), the shield wall W has vertical reinforcement members 7, 7, ... erected and incorporated into the frame surrounded by vertical furring strips 5, 5, ... which also serve as partition posts, horizontal furring strips 6, 6, ... arranged horizontally near the floor 2, and two upper and lower rows of horizontal furring strips 6, 6, ... arranged horizontally below and adjacent to the ceiling 4, and the frame surrounded by the vertical furring strips 5, 5, ..., the horizontal furring strips 6, 6, ... near the floor 2, and the floor 2.

[0019] The horizontal furring strips 6, 6, ... are attached to the vertical furring strips 5, 5, ... with mounting hardware 5a, 5a, ..., and the upper and lower ends of the vertical reinforcements 7, 7, ... are joined to U-shaped hardware 8, 8, ... made of thin plates with a U-shaped cross section in a non-constrained state in the axial and vertical directions of the horizontal furring strips 6, 6, ..., and a certain gap dimension C is secured above the upper ends of the vertical reinforcements 7, 7, ... with the bottom faces of the U-shaped hardware 8, 8, .... As shown in Figure 1, the U-shaped hardware 8, 8, ... is fixed to the horizontal furring strips 6, 6, ... or to the floor 2, and may also be fixed to the upper floor 3, not shown.

[0020] As shown in Figures 2(a) to 2(d), the shielding panels 9, 9, ... are attached to the above-described framework from the inside of the shielded room 1 in the following procedure: First, reinforcing plates 9b, 9b, ... (gypsum board, plywood, etc.) that reinforce the shielding iron plates 9a, 9a, ... are fastened with screws 7a, 7a, ... at predetermined intervals.

[0021] 2(c) and 2(d), the shielding iron plates 9a, 9a, ... are attached to the reinforcing plates 9b, 9b, ... with adhesive. At this time, the dimensions of the shielding iron plates 9a are determined so that a certain gap is secured between adjacent shielding iron plates 9a, and the shielding iron plates 9a are positioned so that the gap is located near the center of the vertical furring strips 5, 5, ... and the horizontal furring strips 6, 6, ....

[0022] The edges of the shielding steel plates 9a, 9a, ... arranged as described above are closed by pressing edges 11, 11, ... which have a width that overlaps the shielding steel plates 9a, 9a, ... by a certain width across the gap via shielding gaskets 10, 10, ... as shown in Fig. 2(b), and are fastened with screws 11a, 11a, ... at predetermined intervals as shown in Fig. 2(d). The screws 11a, 11a, ... have the center line of the gap as gauge line L, L, ... (see Figs. 4 and 5).

[0023] Since the shield wall W has the above-mentioned configuration, the building floor on which the shield room 1 is installed is subjected to an inter-story horizontal displacement δ in the direction of the horizontal arrow shown in FIG. H When this occurs, the shield panels 9, 9, ... rotate in the direction of the circular arrow, and the dimension δ V The behavior of the shield panel 9 at that time can be explained as follows.

[0024] This will be explained with reference to Figures 4 and 5. Figures 4 and 5 are schematic representations of how one shielding panel 9 behaves when the vertical furring strips 5, 5 are tilted, and the dashed dotted lines shown in Figures 4(a), (b) and 5(c), (d) indicate the vertical or horizontal gauge lines L of the screws 11a, 11a, ... that fasten the pressing edges 11, 11, ... that hold down the periphery of the shielding panel 9 to the vertical furring strips 5, 5, ... and the horizontal furring strips 6, 6. In other words, the shielding panel 9 can slide or rotate until the periphery of the shielding panel 9 comes into contact with the vertical or horizontal gauge lines L of these screws 11a, 11a, ...

[0025] When the vertical furring strips 5, 5 are tilted to the right (arrow) of the paper from the initial state in Figure 4(a) as shown in Figure 4(b), there is a gap a between the vertical edge of the shield panel 9 and the vertical gauge line L in the initial state, so if we ignore the frictional resistance between the shield panel 9 and the vertical furring strips 5, 5, the shield panel 9 will remain immobile (undeformed) until the upper corner P2 of the shield panel 9 comes into contact with the vertical gauge line L, and the vertical furring strips 5, 5 can be tilted.

[0026] The inclination angle R (corresponding to the horizontal deformation angle between layers) = R1 of the vertical furring strips 5, 5 at this time is expressed as R1 = a / (Hb), where a is the gap dimension between the vertical edge of the shield panel 9 and the vertical gauge line L, b is the gap dimension between the top edge of the shield panel 9 and the upper horizontal gauge line L, and H is the height from the shield floor surface 2 to the upper horizontal gauge line L.

[0027] If the vertical furring strips 5, 5 are tilted further from the state shown in Figure 4(b), the screws 11a, 11a... of the pressure edges 11, 11 lined up on the vertical gauge line L will press against the upper vertical edge of the shield panel 9, causing it to rotate around the lower end O1 of the vertical reinforcement 7 located at the outermost end of the vertical reinforcements 7, 7,... that are integrated with the shield panel 9, as shown in Figure 5(c).However, the vertical furring strips 5, 5 can continue to tilt until the upper corner P2 of the shield panel 9 comes into contact with the upper horizontal gauge line L.

[0028] Here, let b be the gap dimension between the upper edge of the shielding panel 9 and the upper horizontal gauge line L, c be the upper gap dimension of the upper end O2, diagonally opposite the lower end O1 of the vertical reinforcement 7, h be the height of the vertical reinforcements 7, 7, ..., h be the dimension from the bottom end of the vertical reinforcements 7, 7, ... to the floor 2 in the initial state (Figure 4(a)) h0, and s1 be the spacing between the vertical reinforcements 7, 7 at both ends.The horizontal displacement Δ at point O2 due to the rotation of the shielding panel 9 is Δ = c·h / s1, so the vertical furring strips 5, 5 can be tilted horizontally by at least Δ. Therefore, the inclination angle R2 of the vertical furring strips 5, 5 in the state shown in Figure 5(c) is R2 = R1 + Δ / (h0 + h) = a / (Hb) + c·h / s1 / (h0 + h).

[0029] However, it should be noted that unless the upper gap dimension c of point O2 of the vertical furring strip 5 is somewhat larger than the distance b until point P2 contacts the upper horizontal gauge line L, the rotation of the shield panel 9 will be limited by gap dimension c. In other words, the upward displacement of point P2 due to the rotation of the shield panel 9 can be roughly expressed as c·s2 / s1 when the upward displacement of point O2 matches gap dimension c, so b≦c·s2 / s1 is the condition for the rotation of the shield panel 9 not to be limited by gap dimension c.

[0030] Next, if the vertical furring strips 5, 5 are tilted further from the state shown in Figure 5(c), as shown in Figure 5(d), the screws 11a, 11a... of the pressure edges 11, 11 lined up on the vertical gauge line L press against the shield panel 9, allowing the shield panel 9 to slide sideways by approximately the gap dimension a until the lower corner point P1 of the shield panel 9 comes into contact with the vertical gauge line L. Therefore, if the tilt of the vertical furring strips 5, 5 due to the sliding is added, the tilt angle R3 of the vertical furring strips 5, 5 in the state shown in Figure 5(d) is R3 = R1 + R2 + a / H = a / (Hb) + c·h / s1 / (h0 + h) + a / H.

[0031] As a specific example, when a = b = c = 1 cm, H = 350 cm, h = 300 cm, h0 = 30 cm, s1 = 100 cm, and s2 = 115 cm, the condition b ≦ c s2 / s1 = 1.15 cm is satisfied, so R3 ≒ 2.865 × 10 -3 +9.091×10 -3 +2.857×10 -3 =14.813×10 -3 ≒1 / 68>1 / 100.

[0032] In addition, even if the lateral sliding of the shield panel 9 is not taken into consideration (a / H=0), R2 ≒ 2.865 × 10 -3 +9.091×10 -3 =11.956×10 -3 Since ≒ 1 / 84 > 1 / 100, it can be seen that the effect of the rotation (rocking) of the shield panel 9 is great.

[0033] In other words, since the inclination angles R = R1 to R3 of the vertical furring strips 5, 5 each correspond to the horizontal inter-story deformation angle, it can be said that the mounting structure of the shielding panel according to the present invention is capable of following deformation without damaging the shielding panel even when the horizontal inter-story deformation angle of the building is 1 / 100.

[0034] In the above explanation using Figures 4 and 5, in order to easily explain the possible inclination angles of the vertical furring strips 5, 5, the frictional resistance between the vertical furring strips 5, 5 and the horizontal furring strips 6, 6 and the shielding panel 9 was ignored. In reality, the peripheral edge of the shielding panel 9 is fastened by a plurality of screws 11a, 11a, ... between the vertical furring strips 5, 5 and the horizontal furring strips 6, 6 and the pressing edges 11, 11, ... via shielding gaskets 10, 10, ..., so the states shown in Figure 4(b) and Figures 5(c) to (d) do not occur in a clear order, but here we have simplified it to easily explain the relationship between the inclination of the vertical furring strips 5, 5 and the behavior of the shielding panel 9.

[0035] From the above, the mounting structure for the shielding panels of the present invention allows the shielding panels to rotate rigidly even when the horizontal deformation angle between the building's stories reaches 1 / 100, so they do not deform or are damaged during an earthquake. In addition, the gaps between the edges of adjacent shielding panels are filled with multiple screws that connect the vertical and horizontal furring strips to the holding edge via shielding gaskets, so as long as the screws do not come loose or break, electromagnetic wave leakage is prevented, and the shielding wall's performance is maintained even after an earthquake.

[0036] Furthermore, if a high-ceilinged shielded room 1 is installed on a building floor that is higher than normal, and if the entire height of the shield wall W is covered with only one shield panel 9, 9, ..., each shield panel 9 will be long and heavy, causing problems in terms of transport and erection. However, as shown in Figure 6, if the framework consisting of vertical furring strips 5 and horizontal furring strips 6, into which vertical reinforcement members 7, 7, ... that reinforce the shield panel 9 are built, is composed of at least two levels, one above the other, the shield panel 9 can also be divided into two levels, making it smaller in size and improving the above-mentioned workability problems. [Industrial Applicability]

[0037] On the upper floors of a building, horizontal deformation between stories due to an earthquake is greater than that on the basement floor or the first floor above ground, and when a shielded room is installed on such an upper floor, two stories or higher, the shielding panels covering the walls of the shielded room are required to be able to follow large horizontal deformations, but prior art has not been sufficient.The present invention provides a mounting structure for shielding panels that can maintain shielding performance even when the horizontal deformation angle between stories reaches 1 / 100, and therefore fully meets the performance requirements for shielded rooms installed in mid- to high-rise buildings. [Explanation of symbols]

[0038] 1: Shield Room 2:Floor 3: Upper floor 4: Ceiling 5: Vertical furring strip 5a: Mounting hardware 6: Horizontal furring strip 7: Vertical reinforcement (light steel) 8: U-shaped groove hardware 9: Shield panel 9a: Shielded iron plate 9b: Reinforcement plate 10: Shield gasket 11: Presser edge 11a: Bis a, b: Gap dimensions to the screw gauge line c: Gap dimension above the top end of the vertical reinforcement (light steel) H, h, h0: Height dimension L: Screw gauge line O1: Lower end point of longitudinal reinforcement (light steel) O2: Upper end point of longitudinal reinforcement (light steel) P1, P2: Corners of the shield panel W: Shield wall s1, s2: Horizontal dimension from the bottom end O1 of the longitudinal reinforcement (light steel) R, R1, R2, R3: Vertical furring strip inclination angle (inter-story horizontal deformation angle) δ H : Inter-story horizontal displacement δ V : Floating dimension of the lower end of the vertical reinforcement (light steel) Δ: Horizontal displacement of longitudinal reinforcement (light steel) point O2

Claims

1. In the electromagnetic shielding wall of the electromagnetic shielding room on the building floor where the electromagnetic shielding room is installed, (1) An electromagnetic shield panel that covers an electromagnetic shield wall, in which a certain gap is secured between the edges of adjacent electromagnetic shield panels on the left and right, or adjacent left and right and top and bottom, and the gap is sandwiched and covered by vertical and horizontal furring strips and a pressing edge via an electromagnetic shield gasket. (2) The electromagnetic shield panel is a metallic conductor adhered to a reinforcing surface material, and is attached to and integrated with a vertical reinforcing material incorporated into a frame surrounded by the vertical and horizontal furring strips. (3) The upper and lower ends of the vertical furring strips are fixed to the main body of the building floor, and the upper and lower ends of the vertical reinforcement are fitted into U-shaped groove metal fittings fixed to the horizontal furring strips installed near the floor and ceiling of the building floor, or fixed to the floor and the floor of the upper floor, without being constrained in the axial direction and vertical direction of the horizontal furring strips, and a certain gap is secured above the upper end of the vertical reinforcement and between it and the bottom surface of the U-shaped groove metal fitting. An electromagnetic shield panel mounting structure characterized by including the above configuration.

2. 2. The electromagnetic shield panel mounting structure according to claim 1, (1) The upper and lower ends of the vertical reinforcement that reinforces the electromagnetic shield panel are fitted into U-shaped groove metal fittings fixed to the horizontal furring strips or fixed to the floor and the upper floor floor in a non-constrained state in the material axial direction and vertical direction of the horizontal furring strips, and a certain gap is secured above the upper end of the vertical reinforcement and between it and the bottom surface of the U-shaped groove metal fittings. (2) The framework, consisting of vertical and horizontal furring strips with the vertical reinforcement members built in, is composed of at least two levels, upper and lower. An electromagnetic shield panel mounting structure further comprising the above configuration.

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