JP2020016059A - Ceiling board for system ceiling and t-bar for system ceiling - Google Patents

Abstract

To provide a ceiling board and a T-bar for use in a system ceiling in which the degree of freedom in designing a ceiling surface of the system ceiling is greater than before without making a surface of a lower flange conspicuous, and provide a ceiling board and a T-bar that can be used for the ceiling, even when subject to "specific ceilings".SOLUTION: A ceiling board is used for a system ceiling in which a main T-bar and a cross T-bar each having an inverted T-shaped cross section are arranged in a lattice such that the lower surfaces thereof are at the same level to form a lattice space, and a ceiling board and equipment are arranged in the lattice space. The ceiling board is composed of a rectangular glass wool board and a strip-shaped reinforcing strip attached to four sides. An upper end edge of the reinforcing strip in the long side direction opposed to the main T-bar is bent in the glass wool board direction and then turned back to form the U-shaped fitting section. The ceiling board is suspended from the T-bar in the lattice space by the fitting portion being fitted to a lower flange of the main T-bar.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ceiling plate used for a system ceiling and a T-bar used for a frame of the system ceiling.

  2. Description of the Related Art In a ceiling structure of a building, a system ceiling that can be efficiently constructed with relatively few members is often used. In this system ceiling, for example, a plurality of ridges are suspended with suspension bolts suspended from a slab or the like, and a plurality of inverted T-shaped main T-bars orthogonal to the ridges are horizontally suspended. After constructing a lattice-like lattice space by crossing the cross T-bars between the main T-bars at right angles so that the lower surfaces thereof are at the same level, a ceiling plate and equipment are placed in this lattice space. It is constructed as if dropped.

Following the fall of the suspended ceiling due to the 2011 off the Pacific coast of Tohoku Earthquake, the Building Ordinance on Enforcement of the Building Standards Law was revised to stipulate measures to prevent the building from falling off, and related notices were issued based on the amendment. This related notice stipulates a structural method for a ceiling that is compatible with “ceilings that may pose a serious danger due to falling off” (hereinafter referred to as “specific ceilings”). The specific ceiling is described as “a suspended ceiling having an area of 200 m ² and a mass of more than 2 kg / m ² at a height of more than 6 m, which is installed at a place where people use it daily.” For this reason, a ceiling structure having a mass of 2 kg / m ² or less is required.

As an invention relating to a system ceiling having a mass of 2 kg / m ² or less, there is a “light weight system ceiling base” disclosed in Patent Document 1 which is an invention according to the present applicant.

The "lightweight system ceiling base" disclosed in Patent Document 1 is described as "the number of assembly members of the ceiling is small, the assembly is easy, and the rigidity of the main bar and the crossbar is almost the same as before, while the mass of the ceiling itself is reduced. To provide a lightweight system ceiling foundation capable of suppressing the pressure to 2 kg / m ² or less, and to solve the problem mainly by combining a lower flange with a wide cross-sectional shape with an inverted T-shape. A system ceiling composed of an aluminum main T-bar having a narrow upper flange and a cross T-bar having the same cross-sectional shape, wherein the main T-bar has a first slit opening upward. Are provided at predetermined intervals, and the cross T-shaped bar is provided with second slits opened at a lower portion at predetermined intervals, and the first slit and the second slit are fitted to each other to form a grid. A cross-shaped frame is formed, and at the intersection of the main T-shaped bar and the cross T-shaped bar, an intersection holding member for preventing the cross T-shaped bar from floating is sandwiched between upper flanges of the main T-shaped bar. "Wear".

JP-A-2006-223152

  However, in the “lightweight system ceiling base” disclosed in Patent Document 1, since the ceiling plate is disposed so as to be dropped into the lattice space formed by the T-bar as before, the lower flange of the T-bar when the ceiling is looked up from below. The surface of the ceiling emerges clearly, giving some restrictions to the design of the ceiling surface, and the lattice-like pattern formed by the surface of the lower flange when the room is darkened like a movie theater interferes with movie watching Is concerned.

  The problem to be solved by the present invention is to provide a ceiling plate and a T-bar used for a system ceiling in which the lower flange surface is not noticeable and the degree of freedom in designing the ceiling surface of the system ceiling is larger than before. Another object of the present invention is to provide a ceiling plate and a T-bar that can be used for a ceiling even if the location is a target of a “specific ceiling”.

To achieve the above object, a ceiling panel for a system ceiling according to claim 1 of the present application comprises a main T-bar and a cross T-bar each having a narrow upper flange and a wider lower flange, each of which has an inverted T-shaped cross section. A ceiling plate used as a system ceiling for disposing a ceiling plate and equipment in the lattice space, wherein the ceiling plate is arranged in a lattice so that the lower surface is at the same level. It is composed of a rectangular glass wool plate and a band-shaped reinforcing band attached to four sides and reinforced, and the upper edge of the reinforcing band in the long side direction facing the main T-bar is bent in the glass wool plate direction. After being folded, a fitting portion having a U-shaped cross section is formed, and the fitting portion is fitted to the lower flange of the main T-bar. Fixed from suspended from The said ceiling board interval between narrower than the width of the bottom flange, is characterized by.
Note that “up” and “down” in the present application are concepts when a ceiling plate is attached.
The ceiling panel for a system ceiling according to claim 2 of the present application is the ceiling panel for a system ceiling according to claim 1, wherein a substantially central portion of the reinforcing strip in a short side direction opposed to the cross T-bar is provided. The upper edge is bent in the glass wool plate direction and then turned back to form a fitting portion having a U-shaped cross section, and the fitting portion is fitted to the lower flange of the cross T-bar. I have.
The ceiling panel for a system ceiling according to claim 3 of the present application is the ceiling panel for a system ceiling according to claim 1 or 2, wherein the fitting portion and the fitting portion of the lower flange are made of a sealing material. It is characterized by being adhered.
Furthermore, the ceiling panel for a system ceiling according to claim 4 of the present application is the ceiling panel for a system ceiling according to any one of claims 1 to 3, wherein the surface of the glass wool plate and the surface of the reinforcing strip are It is characterized by being covered with a cosmetic cloth.
A T-bar for a system ceiling according to a fifth aspect of the present invention is a belt-shaped cross-section having an arrowhead shape at least at the center of the lower flange of the main T-bar for suspending the ceiling panel for a system ceiling according to the fourth aspect. And a joint bar having a U-shaped fitting portion having a U-shaped cross section is fitted and attached to the fitting ridge from both sides.

The present invention has the following effects by the above configuration.
(1) The ceiling plate for the system ceiling according to the present invention is different from the conventional method of dropping and fixing in the lattice space by fitting the fitting portion of the reinforcing strip in the long side direction to the lower flange. It is fixed while suspended from the T-bar, and the space between the ceiling plates after fixing is narrower than the width of the lower flange, so when looking up from below, the surface of the lower flange of the T-bar emerges clearly. And the apparent width of the lower flange becomes narrower and less noticeable.
(2) The ceiling plate can be more firmly suspended from the T-bar by fitting it to the cross T-bar at the fitting portion of the reinforcing strip formed only at the center of the short side of the ceiling plate. Fixed. In addition, as for the reinforcing strip in the short side direction facing the cross T-bar, since the fitting portion is formed only in the central portion, the fitting portion of the reinforcing strip in the long side direction is fitted to the lower flange. After that, it can be easily fitted to the lower flange.
(3) Furthermore, by bonding the fitting portion of the reinforcing strip and the fitting portion of the lower flange with a sealing material, the ceiling plate is more firmly fixed, and even from a large shaking such as a large earthquake, the ceiling plate is removed from the lattice space. It will not come off. This will be described later since a full-scale experiment was performed.
(4) By enclosing the surface of the glass wool plate and the surface of the reinforcing strip with a cosmetic cloth, the ceiling surface of the system ceiling can be freely designed, and a design space as desired by the designer can be realized. Can be.
(5) The joint bars are attached along the main T-bar for suspending the ceiling plate, so that the distortion of the ridge line of the ceiling plate wrapped by the decorative cloth is not noticeable, and gives the viewer a clear impression. And increase the degree of freedom in design.

FIG. 1 is a top view of the system ceiling according to the embodiment. 2 is a detailed sectional view taken along the line II-II in FIG. 1, (1) is a detailed sectional view of a main T-bar for a system ceiling, (2) is a detailed sectional view of a ceiling panel for a system ceiling, and (3). Is a detailed sectional view of the joint rod.

  An embodiment according to a mode for carrying out the present invention will be described with reference to FIGS. 1 and 2, reference numeral 10 denotes a ceiling plate for a system ceiling according to the embodiment (hereinafter simply referred to as “ceiling plate”), reference numeral 11 denotes a glass wool plate, reference numeral 12 denotes a reinforcing strip, and reference numeral 13 denotes a decorative band. , 21 is a lower flange, 212 is an upper flange, 213 is a fitting ridge, and 22 is a system ceiling. A cross T-bar (hereinafter simply referred to as “cross T-bar”), and reference numeral 30 is a joint bar.

  The system ceiling is mainly suspended from a main T-bar 21 which is suspended from suspension ceilings (not shown) via suspension fittings (not shown) from a ceiling, and orthogonally to the main T-bar 21. A cross T-bar 22, a ceiling panel 10, and equipment (not shown).

  The ceiling plate 10 encloses a glass wool plate 11 having a rectangular planar shape, a reinforcing strip 12 attached to four side surfaces, a surface (ceiling surface) of the glass wool plate 11 and surfaces of the four reinforcing strips 12. And a makeup cloth 13. Then, the upper edge of the reinforcing strip 12 attached in the long side direction is bent in the direction of the glass wool board 11 and then turned back so that the fitting portion 121 having a U-shaped cross section extends over substantially the entire length of the reinforcing strip 12. On the other hand, the upper edge of the reinforcing strip 12 attached in the short side direction is folded only after the central portion thereof is bent in the direction of the glass wool plate 11, and the cross section is formed only in the central portion. A fitting portion 121 is formed. Further, the four reinforcing strips 12 are made of vinyl chloride, and the decorative cloth 13 is glued to the glass wool board 11 and the reinforcing strip 12.

  The main T-bar 21 and the cross T-bar 22 are extruded aluminum materials, and their cross-sectional shapes are an inverted T-shape having a narrow upper flange 212 located at the upper part and a wide lower flange 211 located at the lower part. It has a shape. A fitting ridge 213 having an arrowhead-shaped cross section is protruded downward along the center line of the lower flange 211 of the main T-bar 21. It is needless to say that the fitting ridge 213 may also be provided on the cross T-bar 22. In the embodiment, the cross-sectional shapes of the main T-bar 21 and the cross T-bar 22 are the same.

  The joint bar 30 has a fitting portion having a U-shaped cross section, and the fitting portion is fitted and fixed to the fitting ridge 213 of the main T-bar 21. In the embodiment, the U-shaped fitting portion has the shape of the joint bar 30 as it is, but the fitting portion can be provided with various cross sections so that it can respond to the variety of designs. it can. In the embodiment, the joint bar 30 is also fitted and fixed to the fitting ridge 213 of the cross T-bar 22.

  Here, the main T-bar 21 is suspended horizontally, and the cross T-bar 22 is bridged between the main T-bars 21 and 21 at right angles to the main T-bar 21 so that the lower surface thereof is at the same level. After the construction, an example of a procedure for attaching the ceiling plate 10 will be described.

(1) The fitting part 121 of the ceiling plate 10 coated with a sealing material on one lower flange 211 of the parallel main T-bar 21, and the sealing material coated on the lower flange 211 of the other main T-bar 21. The reinforcing strip 12 is fitted to the other fitting portion 121 of the plate 10 while pressing it.
(2) The fitting portion 121 formed at the central portion of the reinforcing strip 12 in the short side direction is fitted to the lower flange 211 of the parallel cross T-bar 22 while pressing it. Note that a sealing material is also applied to the fitting portion 121 in advance.
(3) After repeating the above procedure to attach the plurality of ceiling boards 10, the joint bars 30 are fitted to the fitting ridges 213 of the main T-bar 21 and the cross T-bar 22.
Thus, the work of attaching the ceiling panel 10 to the system ceiling is completed.

Next, a full-scale experiment of the “ceiling plate for system ceiling and the T-bar for system ceiling” according to the present invention performed in May 2018 at Kyoto University Disaster Prevention Research Institute will be described.
The outline of the experiment is as follows.
・ Purpose: "T-bar for system ceiling" and "ceiling panel for system ceiling (25 mm thick decorative glass wool ceiling panel)" that can be installed on specific ceilings and other ceiling areas where safety is particularly required. member weight in 2 kg / m ² or less of ultra-light system ceiling that confirms their safety, to check the properties of the behavior during seismic and pressure Funochi.
・ Experimental outline: A decorative glass wool ceiling plate with a module size of 900 mm × 1,800 mm and 1,000 mm × 1,500 mm (with a density of 40 kg / m 3) with a lightweight and flexible ceiling that does not reach a specific ceiling with a component weight of 2 kg / m ² or less. A steel frame for ceiling installation (W2,850 mm x D4,000 mm x H3,000 mm x 1,350 mm) with each specimen of 25 mm thick glass wool finished with a decorative skin material) installed on a strong earthquake test stand , And fixed the two sides to the L-shaped wall to conduct a strong vibration excitation experiment.

In other words, the strong vibration excitation tests were performed on the following test specimens in six waves: Kobe wave of the Great Hanshin-Awaji Earthquake, Haga wave of the Great East Japan Earthquake, Tsukidate wave, Mashiki wave forehead of Kumamoto earthquake, main wave, Kochiya wave of Chuetsu earthquake Were continuously vibrated, and the seismic durability performance of each specimen was confirmed.
The outline of the test pieces is as follows. In each test piece, the fitting portion of the reinforcing strip and the fitting portion of the lower flange of the main T-bar and the cross T-bar were bonded with a sealant.
Specimen 1: 900 mm x 1,800 mm module, decorative nonwoven fabric finish Specimen 2: 1,000 mm x 1,500 mm module, decorative nonwoven fabric finish Specimen 3: 1,000 mm x 1,500 mm module, decorative glass cloth finish Specimen 4 : 900mm × 1,800mm module, decorative glass cloth finish

The experimental results are as follows.
After test, the test specimens 1 to 4 did not show any damage to the frame and ceiling plate after the vibration, and the ceiling plate and members did not fall off.
Specimen 3 withstood 6 strong earthquakes with a seismic intensity of 6 or more (Kobe, Haga, Tsukidate, Mashiki-mae, Mashikimoto, Kochiya) x 17 = 102 in total.
・ The 9th Chuetsu Earthquake Kochiya Wave of Test Specimen 4 recorded the maximum ceiling horizontal response acceleration of 4586.7 gal (4.68 G) in this experiment.
As described above, it was confirmed that the “T-bar for system ceiling” and the “ceiling panel for system ceiling” according to the present invention are also extremely excellent in the seismic durability.

DESCRIPTION OF SYMBOLS 10 Ceiling board for system ceiling concerning Example 11 Glass wool board 12 Reinforcement strip 121 Fitting part 13 Makeup cloth 21 Main T bar for system ceiling 22 Cross T bar for system ceiling 211 Lower flange 212 Upper flange 213 Fitting ridge 30 joint rod

To achieve the above object, a ceiling panel for a system ceiling according to claim 1 of the present application comprises a main T-bar and a cross T-bar each having a narrow upper flange and a wider lower flange, each of which has an inverted T-shaped cross section. A ceiling plate used as a system ceiling for disposing a ceiling plate and equipment in the lattice space, wherein the ceiling plate is arranged in a lattice so that the lower surface is at the same level. A rectangular glass wool plate and a belt-shaped reinforcing band made of vinyl chloride are attached to four sides and reinforced, and the upper edge of the reinforcing band in the long side direction facing the main T-bar is the glass wool. After being bent in the plate direction, it is turned back to form a U-shaped fitting portion, and the fitting portion is fitted to the lower flange of the main T-bar while the reinforcing strip is being pressed. By combining Plate is fixed is suspended from the T-bar in the lattice space, the ceiling board interval between after fixing is narrower than the width of the bottom flange, it is characterized by.
Note that “up” and “down” in the present application are concepts when a ceiling plate is attached.
The ceiling panel for a system ceiling according to claim 2 of the present application is the ceiling panel for a system ceiling according to claim 1, wherein a substantially central portion of the reinforcing strip in a short side direction opposed to the cross T-bar is provided. The upper edge is bent in the direction of the glass wool plate and then turned back to form a U-shaped fitting portion, and the fitting portion is pressed against the lower flange of the cross T-bar while the reinforcing strip is pressed. It is characterized by being fitted and fitted.
The ceiling panel for a system ceiling according to claim 3 of the present application is the ceiling panel for a system ceiling according to claim 1 or 2, wherein the fitting portion and the fitting portion of the lower flange are made of a sealing material. It is characterized by being adhered.
Furthermore, the ceiling panel for a system ceiling according to claim 4 of the present application is the ceiling panel for a system ceiling according to any one of claims 1 to 3, wherein the surface of the glass wool plate and the surface of the reinforcing strip are It is characterized by being covered with a cosmetic cloth.
A T-bar for a system ceiling according to a fifth aspect of the present invention is a belt-shaped cross-section having an arrowhead shape at least at the center of the lower flange of the main T-bar for suspending the ceiling panel for a system ceiling according to the fourth aspect. And a joint bar having a U-shaped fitting portion having a U-shaped cross section is fitted and attached to the fitting ridge from both sides.

Claims (5)

A main T-bar and a cross T-bar each having a narrow upper flange and a wider lower flange and having a cross-section of an inverted T shape are arranged in a lattice such that the lower surfaces thereof are at the same level to form a lattice space, A ceiling panel used for a system ceiling for disposing ceiling panels and equipment in the lattice space,
The ceiling plate is composed of a rectangular glass wool plate and a band-shaped reinforcing band attached to four sides and reinforced,
The upper edge of the reinforcing strip in the long side direction opposed to the main T-bar is bent in the glass wool plate direction and then turned back to form a U-shaped fitting section, and
When the fitting portion is fitted to the lower flange of the main T-bar, the ceiling plate is suspended and fixed from the T-bar in the lattice space,
A ceiling plate for a system ceiling, wherein a distance between the ceiling plates after fixing is smaller than a width of the lower flange. The upper end edge of the substantially central portion of the reinforcing strip in the short side direction opposed to the cross T-bar is bent in the glass wool plate direction and then turned back to form a U-shaped fitting section, and
The ceiling plate for a system ceiling according to claim 1, wherein the fitting portion fits into the lower flange of the cross T-bar.   The ceiling plate for a system ceiling according to claim 1 or 2, wherein a fitting portion between the fitting portion and the lower flange is bonded with a sealing material.   The ceiling plate for a system ceiling according to any one of claims 1 to 3, wherein a surface of the glass wool plate and a surface of the reinforcing strip are covered with a decorative cloth. A band-shaped fitting ridge having a cross section having an arrowhead shape is projected from at least a center portion of the lower flange of the main T-bar for suspending a ceiling plate for a system ceiling according to claim 4,
A joint bar having a U-shaped fitting portion having a U-shaped cross section is fitted and attached to the fitting ridge from both sides, and the T bar for a system ceiling is provided.

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