Lightweight suspended ceiling structure

Abstract

To provide a suspended light ceiling surface which is prevented from becoming a specific ceiling and has various designs.SOLUTION: Double ceiling joists 21 and single ceiling joists 22 as ceiling decorative materials 20 covering a ceiling surface 11 are mounted and arranged at prescribed intervals on a ceiling backing material suspended from a ceiling skeleton to form the ceiling surface 11. The louver light ceiling 12 is constituted on the ceiling surface 11 by reflecting light irradiated from a light source such as a digital signage 4 positioned below the ceiling surface 11 on respective lower surfaces of the double ceiling joists 21 and the single ceiling joists 22.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lightweight suspended ceiling structure, and more particularly to a lightweight suspended ceiling structure that can achieve high designability and avoid specific ceilings. [Background technology]

[0002] A suspended ceiling with a height of over 6m and a horizontal projection area of ​​200m 2 Mass of the components that make up the ceiling surface: 2 kg / m 2 Ceilings that fall under either of the above categories and are installed in places where people enter on a daily basis are considered "specified ceilings" under the Building Standards Act. Specified ceilings are subject to confirmation applications, and a public notice (Ministry of Land, Infrastructure, Transport and Tourism Public Notice No. 771 of 2013) stipulates three standards: (1) Specified Route, (2) Calculated Route, and (3) Minister-certified Route, and they must meet one of these standards.

[0003] Whichever route is taken, the strength of the ceiling underlayment must be stronger than that of a typical suspended ceiling, which increases costs and lengthens the application schedule. This is true not only for ceilings made of typical boards or other surface materials, but also for linear decorative materials such as louvers. In other words, when calculating the ceiling area, it is necessary to consider not only the area of ​​the louvers themselves, but also the area including the gaps between the louvers, to be calculated as 200m². 2 If it exceeds this limit, it will be treated as a specific ceiling.

[0004] In order to avoid the specific ceiling, it is necessary to design it in a way that excludes the above-mentioned requirements, and the following countermeasures are generally taken. (1) Non-suspended ceiling construction method: The ceiling material is attached directly to the main steel frame, or a grape trellis steel frame is installed and the ceiling material is attached directly to that steel frame. This avoids the need for a specific ceiling as a semi-structural earthquake-resistant ceiling. (2) The mass of the ceiling material is 2 kg / m 2 The following construction method: Uses non-combustible membrane materials, non-woven fabric panels, and other lightweight ceiling boards (Patent Document 1).

[0005] In the lightweight suspended ceiling structure disclosed in Patent Document 1, the ceiling board is applied with a load of 0.88 kg / m 2 The inorganic non-combustible heat insulating foam board is used, and the mass of the suspended ceiling per unit area is 1.87 kg / m 2 This gives 2.0 kg / m 2 It states that the following can be achieved: [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Registration No. 3210534 Summary of the Invention [Problem to be solved by the invention]

[0007] The above-mentioned method for avoiding the specific ceiling has the following problems. (1) The construction cost and construction period increase because the steel frame for the grape trellis that constitutes the semi-structural earthquake-resistant ceiling is constructed. In addition, because the steel frame for the grape trellis is prefabricated in a factory or other facility, it is difficult to flexibly respond to changes in the ceiling design. (2) The fixing structure of the membrane material is limited, so there are limited design variations, and since there are many examples of use in existing facilities, it is difficult to differentiate. Construction costs also increase. The lightweight suspended ceiling structure described in Patent Document 1 requires painting the ceiling boards after installing the regular ceiling boards, which may increase construction costs and lengthen the construction period.

[0008] When designing a louvered ceiling instead of a lightweight ceiling board, ordinary aluminum extruded square pipes are often used as louvers. However, among the requirements for avoiding the specific ceiling, the ceiling material weight must be 2.0 kg / m. 2 To meet the following requirements, the distance between the louvers must be quite wide, which creates the problem that when one looks up, the ceiling surface becomes almost bare, exposing parts of the structure, such as the beams, resulting in a stale design.

[0009] Therefore, the object of the present invention is to provide a lightweight suspended ceiling structure that solves the problems of the above-mentioned conventional technology, by using the rafters used as ceiling underlayment materials as ceiling decorative materials as they are, thereby reducing the weight of the ceiling and avoiding handling it as a special ceiling, and by combining rafters of different widths by adjusting the specified installation pitch and arrangement order, and by realizing a ceiling surface designed as a light ceiling that reflects the metallic luster of the ceiling material used in the louvers. [Means for solving the problem]

[0010] The present invention is a lightweight suspended ceiling structure characterized by arranging and attaching rough girders at predetermined intervals as ceiling decorative materials covering the ceiling surface to a ceiling base material suspended from a ceiling frame, thereby forming a louvered light ceiling in which light irradiated from a light source located below is reflected on the underside of the rough girders.

[0011] Another invention is a louvered light ceiling in which rough joists are attached and arranged at predetermined intervals as ceiling decorative materials covering the ceiling surface on a ceiling base material suspended from a ceiling structure, and light emitted from a light source located below is reflected on the underside of the rough joists, and the ceiling surface is characterized in that the ceiling structure and the ceiling base material are finished in a dark color, creating a contrast with the metallic glossy surface of the underside of the rough joists, which are arranged in a number of lines in front of it.

[0012] In both inventions, it is preferable that the ceiling decorative material is made up of a combination of double and single sidings, with the double sidings arranged at a predetermined adjacent interval in the longitudinal direction of the ceiling surface to cover the entire ceiling surface, and the single sidings, the length of which has been adjusted to form a predetermined geometric shape, are arranged between adjacent double sidings, so that the predetermined geometric shape is lined up within the ceiling surface covered by the double sidings. [Effects of the Invention]

[0013] By configuring the lightweight suspended ceiling structure of the present invention as described above, it is possible to avoid special ceilings due to its light weight, there is less risk of ceiling materials falling during a major earthquake, and the design of the ceiling surface can be improved. [Brief explanation of the drawings]

[0014] [Figure 1] An upward view showing an example of the arrangement of a joist as one embodiment of the lightweight suspended ceiling structure of the present invention. [Figure 2] A perspective drawing showing the lightweight suspended ceiling structure shown in Figure 1 installed in the atrium of the building and a part of the atrium. [Figure 3] A top-down view of the lightweight suspended ceiling structure shown in Figure 2. [Figure 4] FIG. 4 is an enlarged partial top view of the rectangular area shown in FIG. 3. [Figure 5] A ceiling plan showing the placement of each siding shown in Figure 1 and the siding support members that hold each siding. [Figure 6] FIG. 5 is an enlarged partial perspective view showing the hanging and holding state of the joist within the parallelogram frame shown in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, one embodiment of the lightweight suspended ceiling structure of the present invention will be described with reference to the accompanying drawings.

[0016] Figure 1 is a view looking up at the ceiling surface 11, seen from directly below (the center of the first floor of the atrium 1), of a lightweight suspended ceiling structure 10 constructed as the ceiling surface 11 of the atrium 1, which extends from the first to third floors in the building shown in Figure 2. The building shown in this example was constructed as a shopping center, and has a planar shape in which store wings 2 extend in two directions, forming an angle of approximately 115° at the center of the building's plan, with the atrium 1 located at the bend in the building. As shown in Figure 2, the atrium 1, where the traffic lines of the store wings 2 extending in two directions intersect, has a plaza on the first floor. In addition, handrails 3 are placed on each floor surrounding the atrium 1, creating a corridor that allows customers going between the stores on each floor to walk around while looking out at the atrium space. On one side of the atrium 1, a large digital signage 4 is installed, supported by a steel frame that extends from the first floor to the ceiling, and behind it is an escalator 5 that serves as a means of transportation between floors (Figure 2). Images displayed on the digital signage 4 can be seen from the first floor and over the handrails on each floor facing the atrium 1. The light emitted from this digital signage 4 also reaches the ceiling surface 11.

[0017] The ceiling of this atrium 1 is a flat, approximately hexagonal shape as shown in Figure 1, with a horizontal projection area of ​​200 m 2 Beyond this, on part of one side of the central position where the convex part is formed, digital signage 4 with a large screen is installed, stretching from the second floor level to the third floor level (Fig. 2). In Fig. 1, the installation positions of the digital signage 4 and the steel foundation frame that supports it are drawn with dashed lines to help understand the positional relationship between the ceiling surface 11 and the digital signage 4.

[0018] A louvered ceiling 12, which is one embodiment of the lightweight suspended ceiling structure 10 of the present invention, is installed on the ceiling surface 11 of this atrium section 1. The ceiling decorative material 20 that constitutes the ceiling surface 11 of the louvered ceiling 12 is made up of double joists 21 that cover almost the entire surface of the ceiling surface 11 along the longitudinal direction of the ceiling surface 11, and single joists 22 that are cut to a specified length and arranged to form a specified geometric shape that enhances the design of the louvered ceiling 12.

[0019] As shown in Figure 1, the louvered ceiling 12 has double rafters 21 arranged at equal intervals (300 mm pitch) along the longitudinal direction across the entire ceiling area, which is divided into a flat, approximately hexagonal shape. Furthermore, single rafters 22 of a predetermined length are arranged in the middle between adjacent double rafters 21. In other words, where the single rafters 22 are arranged, the arrangement (adjacent) interval between the double rafters 21 and the single rafters 22 is 150 mm.

[0020] The siding used in this embodiment is made of ready-made parts of hot-dip galvanized steel sheets with a thickness of 0.5 mm, called JIS19 type CW (double siding) and CS (single siding 22), and the web surfaces of the double siding 21 and single siding 22 are facing downward and used as ceiling decorative materials 20. In addition, the single siding 22 is used to secure a ceiling surface 11 with a mass of 2.0 kg / m 2 As shown below, the louvered ceiling 12 is arranged in combination with the double joists 21 arranged across the entire ceiling surface 11. This prevents the louvered ceiling 12 from being treated as a special ceiling.

[0021] The louvered ceiling 12 of this embodiment is designed so that a predetermined geometric shape is formed on the ceiling surface 11 by single siding 22 of a predetermined length between adjacent double sidings 21, against the backdrop of double sidings 21 arranged across almost the entire ceiling surface 11. For example, in this embodiment, as shown in FIG. 1, the single siding 22 is first arranged at approximately the center of the ceiling surface 11 to form a large, approximately isosceles triangle with a base of approximately 11 m and a height of approximately 10 m, with the base located on the side where the digital signage 4 is installed. Furthermore, to ensure that the design of the entire elongated ceiling surface 11 is symmetrical around the approximately isosceles triangular portion 12A, two approximately trapezoidal portions 12B are provided on one side, from a position corresponding to the hypotenuse 12Aa of the approximately isosceles triangular portion 12A to both ends of the longitudinal direction of the ceiling surface 11, so as to form two trapezoidal portions 12B with two sides 12Ba, 12Bb parallel to the hypotenuse 12Aa of the approximately isosceles triangular portion 12A. In terms of dimensions, the single siding 22 are arranged to form a substantially trapezoidal portion 12B with a length of one side of approximately 3.0 m in the longitudinal direction of the ceiling at a distance of approximately 5.0 m from the position corresponding to the hypotenuse 12Aa of the substantially isosceles triangular portion 12A, and to form a substantially trapezoidal portion 12C with a length of one side of approximately 1.2 m in the longitudinal direction of the ceiling along the edge of the ceiling surface 11. The ceiling mass of the louvered ceiling 12 (Fig. 1) designed to include each of these geometric shapes (12A, 12B, 12C) is 1.97 kg / m 2 2.0 kg / m 2 The following is true, and it is therefore not treated as a specific ceiling.

[0022] Figure 3 is a view looking up at an example in which double rafters 21 and single rafters 22 arranged in the design shown in Figure 1 are actually installed as a louvered ceiling 12 in a building, as shown in Figure 2, for example. Figure 4 is a view looking up at an enlarged view of the rectangular frame (IV) in Figure 3. In the installation example shown in Figures 3 and 4, the underside of the upper floor slab in the area defined as the ceiling surface 11, the beams, the ceiling base material 30 (comprised of the hanging hardware, hanging bolts, hangers, clips, and rafter support components described later), etc., are all painted a dark, deep brown color, for example, and the double rafters 21 and single rafters 22 are attached at a predetermined interval to the rafter support 31 (Figures 5 and 6) serving as the ceiling base material 30. The double siding 21 and single siding 22 are made of unpainted hot-dip galvanized steel sheets, so that, as shown in Figures 2 to 4, the undersides of the metallic, shiny sidings, which form multiple lines at the front, line up against the dark background with high contrast. Furthermore, by arranging the single siding 22 among the double siding 21, a ceiling surface 11 is obtained in which the geometric shapes of the approximately isosceles triangular portion 12 and the approximately trapezoidal portion 13 stand out. At this time, the light from the image projected on the digital signage 4 illuminates the ceiling surface 11, making the ceiling surface 11 of a predetermined geometric shape shine like a lighted ceiling. It goes without saying that the geometric shape formed by the single siding 21 can be a variety of shapes, including the approximately isosceles triangle described above, as well as trapezoids, rectangles, squares, circles, ovals, ellipses, and randomly varying shapes.

[0023] In this way, in the present invention, the large screen of the digital signage 4 is located below the part that corresponds to the base of the approximately isosceles triangular portion 12, and the various colors of the image displayed on the screen of the digital signage 4 are reflected by each of the metal rafters that make up the ceiling surface 11, so that the ceiling surface 11, which forms the approximately isosceles triangular portion 12 made up of the double rafters 21 and the single rafters 22, functions as a louvered light ceiling that utilizes the reflected light to create a variety of colors.

[0024] Figure 5 is a plan view of the ceiling surface 11 showing an example of the arrangement of the double joists 21 and single joists 22 that make up the ceiling surface 11 shown in Figure 1, and the joist supports 31 that support each joist. Each joist support 31 is parallel to the hypotenuse 12Aa of the approximately isosceles triangular portion 12 shown in Figure 1, and is made of a prefabricated member processed into a C-shaped steel beam from a hot-dip galvanized steel sheet with a thickness of 1.2 mm, with a sufficient number of members arranged to hold each double joist 21 and single joist 22 in an even balance, and is suspended from the upper floor slab surface (not shown) via suspension bolts 32, which will be described later.

[0025] Figure 6 is a partial perspective view showing the suspended state of the double rafters 21 and single rafters 22 at the area enclosed by the parallelogram frame (VI) in Figure 5. As shown in the figure, the single rafters 22, each of a uniform length, are firmly secured to two rafter supports 31 suspended from the upper floor slab via well-known clips 33 and fully threaded suspension bolts 32 of a predetermined bolt diameter, so as to form a substantially trapezoidal portion 13 at the end of the ceiling surface 11, with sides parallel to the slanted edge of the ceiling surface 11. The double rafters extending longitudinally along the ceiling surface 11 are also secured to the rafter supports 31 via well-known clips 34, similar to the single rafters 22. Because the double rafters 21, single rafters 22, and the components supporting them are common components commonly used in standard ceiling underlayment, installation can be completed by skilled interior contractors alone. This reduces construction costs and shortens construction time. In addition, by varying the size and type of nobe and arranging them, it becomes possible to create a variety of innovative designs.

[0026] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. In other words, embodiments obtained by combining technical means modified appropriately within the scope of the claims are also included in the technical scope of the present invention. [Explanation of symbols]

[0027] 1 Atrium 4. Digital Signage 10 Lightweight suspended ceiling structure 11 Ceiling surface 12 Louvered ceiling 20 Ceiling decorative material 21 Double Renge 22 Single No-en 30 Ceiling underlayment 31 Noenuke 32 Hanging bolt

Claims

1. This lightweight suspended ceiling structure is characterized by the fact that rough girders are attached and arranged at predetermined intervals as ceiling decorative materials covering the ceiling surface on a ceiling base material suspended from a ceiling frame, and a louvered light ceiling is formed in which light irradiated from a light source located below is reflected on the underside of the rough girders.

2. A louvered ceiling is a ceiling structure in which ceiling framing members are attached at predetermined intervals as ceiling decorative members covering the ceiling surface to a ceiling base material suspended from a ceiling framework, and light emitted from a light source located below is reflected on the underside of the framing members. The ceiling surface is a lightweight suspended ceiling structure characterized in that the ceiling frame and the ceiling underlayment are finished in a dark color, creating a contrast with the glossy metallic surface of the underside of the rafters, which are arranged in a large number of lines in front of them.

3. The ceiling decorative material is a combination of double and single rafters, the double rafters being arranged at a predetermined adjacent interval in the longitudinal direction of the ceiling surface so as to cover the entire ceiling surface, and the single rafters, the length of which is adjusted to form a predetermined geometric shape, are arranged between adjacent double rafters, so that the predetermined geometric shape is lined up within the ceiling surface covered by the double rafters, a lightweight suspended ceiling structure as described in claim 1 or claim 2.

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