JPH116225A - Electromagnetic wave shielding building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need of electromagnetic wave shielding construction so as to reduce the cost, save labor and shorten the term of works by using a steel placing formwork as formworks of a column, a beam, a wall and a floor of RC, SRC structure, and arranging electromagnetic shielding materials in the joint part thereof. SOLUTION: A steel placing beam framework 20 includes steel beam formworks formed by a keystone plate at both sides and the bottom, which are connected to each other like a box by connecting members. The joint part between a steel placing column formwork 10 and the steel placing beam formwork 20 and the joint parts between the column and the beam and between the beam and a floor are filled with electromagnetic wave shielding material such as wire noet, sheet steel, conductive sealant or the like. A U-shaped steel plate electromagnetic wave shielding material 19 is fitted to the upper surfaces of the steel placing wall formwork 18 and the steel placing beam formwork 20 to eliminate the electrical clearance with the steel placing floor formwork 9. Concrete is placed in the steel placing formwork to construct the column, the beam, the wall, or the like of RC, SRC structure. Thus, the formwork can be used as it is to ensure desired electromagnetic wave shielding performance by simple construction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding building in which the surroundings are covered with an electromagnetic wave shielding layer made of an electromagnetic wave shielding material and the space inside the building is formed as an independent electromagnetic wave shielding space from the outside.

[0002]

2. Description of the Related Art As an office building becomes OA, an information communication processing system using a LAN or another communication line is constructed. However, as the system becomes large-scale, securing a communication line becomes an issue. If the wiring of cables becomes complicated and complicated with the increase of communication information, when rearranging rooms and equipment,
The work of wiring change increases. Therefore, adoption of a wireless communication system using radio waves has attracted attention as one method.

[0003] However, when a radio communication system using radio waves is adopted, regulations of the Radio Law regarding the frequency band to be used pose a problem. Therefore, in order to freely select and set the frequency band to use and adopt a unique wireless communication method without being restricted by the Radio Law, the space inside the building was electromagnetically shielded from the outside. Construction of an electromagnetic shielding building is indispensable. The applicant has already disclosed such an electromagnetic wave shielding building in, for example, Japanese Patent Publication No. 6-99972, Japanese Patent Publication No. 6-99973, Japanese Patent Publication No. 7-16118, and Japanese Patent Publication No. 6-76706. And Japanese Patent Publication No. 6-99971, Japanese Patent Publication No. 6-33699, and Japanese Patent Publication No. 6-138.
No. 22 proposes a shielding structure for an entrance of a building in Japanese Patent Publication No. 6-63407, Japanese Patent Publication No. 5-79790, and Japanese Patent Publication No. 3-58557, which describe a window opening shielding structure. In addition, Japanese Patent Publication 3-62320
And Japanese Patent Publication No. 3-44972 and Japanese Patent Publication No. 3-62
Japanese Patent Publication No. 318 and Japanese Patent Publication No. 5-34159 propose a ceiling and a shielding structure for each layer.

FIG. 5 is a diagram showing an outline of the configuration of an electromagnetic wave shielding building according to the present invention. The wall 1 is formed, for example, by applying a metal mesh or a metal foil (film) to the inner wall of a building or applying a conductive paint. An electromagnetic wave shielding layer is formed, or a board having such an electromagnetic wave shielding layer formed on one side is used. The ceiling 2 and the floor 3 are constructed in the same manner as the wall 1,
Alternatively, a panel to which an electromagnetic wave shielding material is attached is used. The window 4 is formed by forming an electromagnetic wave shielding film on one or both sides of the window glass by using an electromagnetic wave shielding material in the same manner as described above, and connecting the electromagnetic wave shielding film to a sash frame to form an electromagnetic wave shielding layer on the wall 1 and the window 4. Are electrically connected integrally. The door 5 uses a panel made of an electromagnetic wave shielding material. When the door is closed, the periphery of the door 5 is provided on the wall 1 on the three-sided door frame 6 and the floor 3.
And can be electrically connected to the

As described above, an electromagnetic wave shielding building uses an electromagnetic wave shielding material for a frame and a wall structure, and further uses an electromagnetic wave shielding material for windows and entrances and the like to cover the entire surface along the outer wall of the building. By covering with a shielding material, the space in the building can be configured as one electromagnetic wave shielding space independent from the outside.

[0006]

However, in the above-mentioned conventional electromagnetic wave shielding work, since the electromagnetic wave shielding material such as a metal mesh, a metal thin plate, or a conductive nonwoven fabric is stretched on the concrete surface after dismantling the formwork, the work is started. Is slow and requires a scaffold for work, and there is a problem of working at heights and a problem of generating waste such as offcuts, resulting in high costs. ing.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electromagnetic shielding building capable of securing desired electromagnetic shielding performance with low cost and simple construction.

[0008]

According to a first aspect of the present invention, there is provided an electromagnetic wave shielding building according to the first aspect of the present invention, wherein a steel, a RC, an SRC structure, a column, a beam, a wall, and a floor are framed. An electromagnetic wave shielding material is provided at a joint portion of a steel driving formwork of a column, a beam, a wall, and a floor using a formwork. The invention according to claim 2 is the invention according to claim 1, wherein The driving form is a keystone plate, and the invention according to claim 3 is characterized in that in claim 1 and 2, the electromagnetic wave shielding material made of a U-shaped steel plate is provided on the upper surface of the steel driving form of the beam and the wall. It is characterized by being arranged.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of the electromagnetic shielding building of the present invention. As described with reference to FIG. 5, the present invention is applied to an electromagnetic shielding building in which the surroundings are covered with an electromagnetic shielding layer made of an electromagnetic shielding material and the space inside the building is configured as an independent electromagnetic shielding space from the outside. The feature of the present invention is that steel, which can be manufactured in a facility or a factory attached to a building site without using a conventional plywood form, for the formwork of columns, beams and floors of RC structure and SRC structure. It is to adopt a driving form entirely.

FIG. 1 shows a steel driving column formwork according to the present invention, and FIG. 1 (A) is a perspective view of the steel driving column formwork.
FIG. 1B is a partially exploded perspective view of FIG. 1A, and FIG. 1C is a cross-sectional view of a column steel formwork.

The steel driven column formwork 10 is provided with two steel column forms 11 and 12 obtained by bending a keystone plate made of galvanized steel sheet into an L-shape. Steel column formwork 1
1 and 12 have a substantially uneven shape in cross section as shown in FIG. 1 (C), and as shown in FIG. 1 (B), beam form joints 11a and 12a are formed in the upper part. These steel column forms 11 and 12 are connected by screws 13a by a connecting member 13 made of an angle material, and the other two corners are fixed by a reinforcing member 14 made of the same angle material to form a prismatic inside. Column space 15 is formed. In addition, pillar space 1
Reinforcing bars or steel frames / reinforcing bars are provided in advance in 5.

A pair of angled support members 16 are attached to opposite side surfaces of the steel column forms 11 and 12, and the support members 16 are provided in a plurality of steps in the vertical direction of the steel column forms 11 and 12. Attached over. And
A plate-shaped fastening member 17 is placed on the support member 16 to fasten and fix the periphery of the steel column forms 11 and 12.

FIG. 2 is a sectional view of a steel driving beam formwork according to the present invention. The steel driven beam formwork 20 is made of a steel beam formwork 21, 2 made of a keystone plate on both side surfaces and a bottom surface.
2 and are connected in a box shape by a connecting member 23. A suspending tool 24 is fixed to the upper part of the steel beam formwork 21 on both sides, and a temporary support truss body 25 is supported on the suspending tool 24 in the longitudinal direction of the beam. 25, it is erected on the beam construction part. In addition, a plurality of spacer members 26 are provided between the steel beam formwork 21 on both sides, and the rebar tip assembly 27 is positioned and supported by the upper spacer member 26. Reinforcing bar assembly 27
Has a beam main bar 27a arranged in the longitudinal direction of the beam and a stirrup 27b arranged around the beam main bar 27a. The lower beam main bar 27a is fixed by a locking metal fitting 28. The periphery of the steel driving beam form 20 is fastened and held by a plurality of fastening members 29 formed of a band.

Although the columns and beams have been described in the above embodiment, the floor is similarly constructed using a steel driven floor formwork.

FIGS. 3 and 4 show an embodiment of the present invention, in which a beam form joint 11a of a steel driving column form 10 of FIG.
2 shows a state where the steel driving beam formwork 20 of FIG. 2 is joined,
FIG. 3 is a sectional view of the joint, FIG. 4A is an overall perspective view, and FIG.
4B is a cross-sectional view taken along the line BB in FIG. 4A in the direction of the arrow, and FIG. 4C is a cross-sectional view showing a joint between the floor and the beam.

In FIG. 3, a support member 30 made of an angle material is provided at the lower end of the beam form joint portion 11a of the steel driving column form 10, and the support member 30 is supported on the tightening member 17. Further, the end of the steel driving beam formwork 20 is supported on the support member 30. Since there is a gap through which electromagnetic waves leak at the joint between the steel driving column formwork 10 and the steel driving beam formwork 20, a wire mesh,
Electromagnetic wave shielding material 31 made of thin steel sheet, conductive sealant, etc.
Is arranged and filled. The joint between the column and the floor and the joint between the beam and the floor are similarly provided with the electromagnetic wave shielding material 31 and filled therein.

FIG. 4 shows a beam form joint 1 shown in FIG.
1a, 12a are shown, as well as a steel driven-wall formwork 18 consisting of a keystone plate. An electromagnetic shielding member 19 made of a U-shaped steel plate is fitted on the upper surface of the steel driving wall formwork 18, and a steel driving floor formwork 9 (FIG. C) disposed on the upper surface of the steel driving wall formwork 18. Electrical gaps between them. The depth of this electromagnetic shielding material 19 is
When the pitch of the keystone plate is twice or more the pitch of the peaks and a higher performance electromagnetic shielding effect is required, as shown in FIG.
Electromagnetic wave shielding material 31 made of thin steel sheet, conductive sealant, etc.
Is arranged and filled. In addition, as shown in FIG. C, an electromagnetic shielding member 19 made of a U-shaped steel plate is fitted on the upper surface of the steel driving beam formwork 20, and an electrical connection between the steel driving formwork 9 and the deck plate is made. I try to eliminate gaps. The electromagnetic wave shielding member 19 is not limited to a U-shape, but may be an L-shape. Further, the pillar 11 of FIG.
An electromagnetic shielding member 19 may be provided at the twelve beam form joints 11a and 12a. Electromagnetic shielding members 19 are also used at the joints of the floor frames 9 of the columns 11 and 12.

By pouring concrete into the steel driving formwork of the columns, beams, floors, and walls configured as described above, the RC structure and the SRC structure having the steel driving formwork can be used. The walls and floor can be constructed without using a conventional plywood form, and as shown in FIG. 5, the electromagnetic waves to be leaked from the floor 3 are formed by a steel driven floor form 9 made of a deck plate. Electromagnetic waves that are reflected and are likely to leak from the column 7 are attenuated in the steel driven column form 10 by the waveguide effect, so that desired electromagnetic shielding performance can be secured.

When an electromagnetic wave shielding zone is formed on the upper and lower floors, the beams at the boundaries between the upper and lower floors and the floor form are made of a material other than metal, such as a plywood form, so that electromagnetic waves can be transmitted therethrough. Let it.

[0020]

As is apparent from the above description, according to the first and third aspects of the present invention, since the formwork is manufactured at the factory and there is no dismantling work, the cost and the building waste are reduced and the labor is saved. Thus, safety and construction period can be shortened. Also,
Since the formwork is used as it is as an electromagnetic wave shielding material, electromagnetic wave shielding work is not required, and drastic cost reduction, reduction of building waste, labor saving, safety and shortening of construction period can be achieved. The electromagnetic shielding performance can be secured.

According to the second aspect of the present invention, by employing a keystone plate as the steel driving form, the strength of the steel driving column form can be increased and the load of the beam can be supported by the column. It is possible to reduce the number of shoring works.

[Brief description of the drawings]

FIG. 1 shows a steel driven column formwork according to the present invention, and FIG.
1A is a perspective view of a steel driving column formwork, and FIG.
1A is a partially exploded perspective view, and FIG. 1C is a cross-sectional view of a steel column formwork.

FIG. 2 is a sectional view of a steel driving beam formwork according to the present invention.

FIG. 3 is a cross-sectional view showing one embodiment of the present invention and showing a state where the steel driving beam formwork of FIG. 2 is joined to the steel driving column formwork of FIG. 1.

4A and 4B show one embodiment of the present invention, FIG. 4A is an overall perspective view, and FIG. 4B is a cross-sectional view taken along a line BB of FIG. FIG. 4C is a cross-sectional view showing a joint between the floor and the beam.

FIG. 5 is a cross-sectional view for explaining the operation of the present invention.

FIG. 6 is a diagram showing an outline of a configuration of an electromagnetic shielding building according to the present invention.

[Explanation of symbols]

 9, 10, 18, 20 ... steel driving formwork 11a, 12a ... joint 19, 31 ... electromagnetic wave shielding material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Sakurai 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hirokazu Sato 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Makoto Kokubu 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Shinichi Shibuya 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside

Claims (3)

[Claims] 1. A steel driven formwork is used for columns, beams, walls and floors of RC structure and SRC structure, and an electromagnetic wave shield is formed at a joint of the steel driven forms of columns, beams, walls and floors. An electromagnetic shielding building characterized by the installation of materials. 2. The electromagnetic shielding building according to claim 1, wherein the steel driving form is a keystone plate. 3. The electromagnetic wave shielding building according to claim 1, wherein an electromagnetic wave shielding material made of a U-shaped steel plate is disposed on the upper surface of the steel driving formwork of the beam and the wall.