JP2020165211A - Ceiling structure - Google Patents

Abstract

To provide a ceiling structure capable of effectively improving fire resistant property and sound insulation property.SOLUTION: A ceiling structure comprises ceiling materials 60 fixed to a ceiling substrate formed in a lattice shape by a first frame and a second frame. The ceiling material 60 is formed by laminating a plurality of strengthened gypsum boards with a thickness D61, D62 of 9 mm or more, and a total thickness D60 of the plurality of strengthened gypsum boards is made to be 35 mm or less. The plurality of strengthened gypsum boards have the same specification with each other.SELECTED DRAWING: Figure 5

Description

The present invention relates to a technique for a ceiling structure including a ceiling material fixed to a ceiling base.

Conventionally, a technique of a ceiling structure including a ceiling material fixed to a ceiling base has been known. For example, as described in Patent Document 1.

The ceiling structure described in Patent Document 1 includes a ceiling structure frame (ceiling base) formed in a grid pattern by a main bar and a crossbar, and a ceiling panel (ceiling plate) attached to the ceiling structure frame. The ceiling structure frame is hung from a hanging bolt via a mounting bracket. The ceiling panel is attached to the ceiling structure frame in a state of being placed on a flange portion formed on the ceiling structure frame.

Japanese Patent No. 6254792

In Patent Document 1, the ceiling panel is made of a plate material such as gypsum board or a control panel. However, when such a ceiling panel is composed of, for example, one gypsum board, it is difficult to improve fire resistance and sound insulation.

The present invention has been made in view of the above circumstances, and the problem to be solved thereof is to provide a ceiling structure capable of effectively improving fire resistance and sound insulation.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

That is, the ceiling structure includes a ceiling material fixed to the ceiling base, and the ceiling material is formed by laminating a plurality of reinforced gypsum boards having a thickness of 9 mm or more, and the reinforced gypsum boards of the plurality of reinforced gypsum boards. It is formed so that the total thickness is 35 mm or less.

As the plurality of reinforced gypsum boards, those having the same specifications may be used.
With such a configuration, the cost can be reduced.

As the plurality of reinforced gypsum boards, those having a glass fiber net may be used.
With such a configuration, fire resistance can be further improved.

The total thickness of the plurality of reinforced gypsum boards may be formed so as to be 30 mm or less.
With such a configuration, it is possible to facilitate the construction of the ceiling material.

The thickness of the plurality of reinforced gypsum boards may be formed so as to be 15 mm or more, respectively.
With such a configuration, the fire resistance and sound insulation of the reinforced gypsum board can be improved.

A heat insulating material arranged above the ceiling material may be further provided.
With such a configuration, heat insulation and sound insulation can be improved.

The ceiling base is divided so as to sandwich the beam, and the ceiling structure may further include a connecting member for connecting the divided ceiling base below the beam.
With such a configuration, the divided ceiling base can be reinforced.

Fire resistance and sound insulation can be effectively improved.

Schematic diagram showing the building. Sectional view showing the wall. Cross-sectional view showing the wall edge on the top floor. (A) Rear sectional view showing the ceiling structure according to the first embodiment. (B) Similarly, a side sectional view. (A) A perspective view showing a ceiling material. (B) Similarly, a cross-sectional view. (A) Rear sectional view showing the ceiling structure according to the second embodiment. (B) Similarly, a side sectional view. (A) Rear sectional view showing a ceiling structure according to a modified example. (B) Similarly, a side sectional view.

In the following description, the up-down direction, the left-right direction, and the front-back direction are defined according to the arrows shown in the figure.

Hereinafter, the ceiling structure 10 according to the first embodiment will be described. First, the building 1 to which the ceiling structure 10 is applied will be briefly described.

Building 1 shown in FIG. 1 is a two-story apartment house. The building 1 includes an outer wall portion 2, a roof 3, a partition wall 4, a ceiling structure 10, and the like.

The outer wall portion 2 shown in FIGS. 1 and 2 is a member forming the outer wall of the building 1. The outer wall portion 2 includes an exterior surface material 2a arranged on the most outdoor side, an interior surface material 2b arranged on the most indoor side, and a heat insulating material 2c provided between the exterior surface material 2a and the interior surface material 2b. And the fire stop material 2d and the like.

The roof 3 shown in FIGS. 1 and 3 is provided above the outer wall portion 2. A plurality of partition walls 4 are provided in the building 1, and the inside of the building 1 is divided into a plurality of rooms. The ceiling structure 10 is for forming a ceiling on each floor of the building 1. The ceiling is supported by beams 5. The beam 5 is composed of an H-shaped steel or a C-shaped steel having a web and an upper flange and a lower flange formed at an end portion of the web. The beam 5 includes a large beam 5a and a small beam 5b formed so as to extend in two directions (front-rear direction and left-right direction in the first embodiment) orthogonal to each other in the horizontal direction (see FIG. 4).

Hereinafter, the configuration of the ceiling structure 10 according to the first embodiment will be described with reference to FIG.

The ceiling structure 10 includes a hanging metal fitting 20, a ceiling base 30, a heat insulating material 40, a moisture-proof sheet 50, and a ceiling material 60.

The hanging metal fitting 20 is for suspending and supporting the ceiling base 30 described later. A plurality of hanging metal fittings 20 are provided on the girder 5a or the girder 5b at intervals.

The ceiling base 30 is for fixing the ceiling material 60, which will be described later. The ceiling base 30 is formed in a substantially grid pattern in a plan view. The ceiling base 30 is arranged at a position lower than the beam 5 so that the heat insulating material 40 described later can be laid below the beam 5. The ceiling base 30 includes a first frame 31 and a second frame 32.

The first frame 31 is an elongated member whose longitudinal direction is one horizontal direction (front-back direction in the first embodiment). The first frame 31 is formed in a substantially C-shape in cross section with one side open on each side. Two first frames 31 are arranged below the girder 5a so that the openings face each other. The two first frames 31 are fixed to the girder 5a or the girder 5b via the hanging metal fitting 20.

The second frame 32 is a long member whose longitudinal direction is oriented in the left-right direction (direction orthogonal to the longitudinal direction of the first frame 31 in a plan view). The second frame 32 is formed in a substantially U-shape in cross section with an opening at the top. The vertical width of the second frame 32 is formed to be smaller than the vertical width of the first frame 31. The second frame 32 is arranged side by side in the front-rear direction below the beam 5b. The front and rear second frames 32 are fixed to the first frame 31, respectively.

The heat insulating material 40 is placed on the ceiling base 30. The heat insulating material 40 is laid between the ceiling base 30 and the beam 5, and is provided so as to straddle the beam 5. In this way, the heat insulating material 40 is laid over the entire area of the ceiling.

The moisture-proof sheet 50 is a sheet-like member having a moisture-proof effect (difficult to permeate moisture). The moisture-proof sheet 50 is formed to have flexibility. The moisture-proof sheet 50 is provided on the lower surface of the ceiling base 30 (first frame 31 and second frame 32).

The ceiling material 60 is a substantially plate-shaped member forming a ceiling surface. The ceiling material 60 is arranged with the plate surface facing up and down. The ceiling material 60 is fixed to the ceiling base 30 via the screw A. A plurality of ceiling materials 60 are provided so as to be arranged in the horizontal direction.

In the first embodiment, the ceiling material 60 is not composed of one gypsum board, but a plurality of gypsum boards are laminated to improve fire resistance and sound insulation. Hereinafter, the configuration of the ceiling material 60 will be described in detail with reference to FIGS. 4 and 5.

The ceiling material 60 according to the first embodiment is formed by laminating two gypsum boards one above the other. As shown in FIG. 5, the ceiling material 60 includes a first board 61 and a second board 62.

The first board 61 is the upper gypsum board of the two gypsum boards laminated one above the other. The first board 61 is composed of a reinforced gypsum board in which an inorganic fiber is put in a core material portion to improve fire resistance. The thickness D61 of such a first board 61 is formed so as to be 9 mm or more. The thickness D61 of the first board 61 according to the first embodiment is 15 mm. Further, in the first board 61 according to the first embodiment, a reinforced gypsum board containing a glass fiber net is used as the inorganic fiber.

The second board 62 is the lower gypsum board of the two gypsum boards laminated one above the other. Like the first board 61, the second board 62 is composed of a reinforced gypsum board having a thickness D62 of 9 mm or more. As the second board 62 according to the first embodiment, a reinforced gypsum board having the same specifications as the first board 61 is used. Specifically, the second board 62 according to the first embodiment has the same type as the first board 61 (the core material portion contains the same glass fiber net as the first board 61, and has the same composition as the first board 61. Reinforced gypsum board (consisting of) is used. Further, the thickness D62 of the second board 62 is formed so as to have the same thickness as the thickness D61 (15 mm) of the first board 61. Further, the width and depth (horizontal width and front-rear width) of the second board 62 are formed to have the same dimensions as the width and depth of the first board 61.

As shown in FIG. 4, the first board 61 of the ceiling material 60 configured in this way is fixed to the ceiling base 30 from below via the screw A. Further, the second board 62 is fixed to the first board 61 and the ceiling base 30 from below via the screw A. As a result, the first board 61 and the second board 62 are stacked one above the other and provided on the ceiling.

In the first embodiment, the ceiling material 60 is composed of the thick (15 mm) first board 61 and the second board 62 having relatively thick D61 and D62, and the thickness D60 of the ceiling material 60 (total of the thicknesses D61 and D62). (See FIG. 5) is secured (to 30 mm). Thereby, fire resistance and sound insulation can be improved. Further, by laminating a plurality of (two) reinforced gypsum boards having excellent fire resistance, the fire resistance and sound insulation can be effectively improved.

Here, from the viewpoint of improving fire resistance and sound insulation, it is desirable that the thickness D60 of the ceiling material 60 is thick. On the other hand, the workability of the ceiling material 60 (easiness of construction), specifically, the weight and ease of holding the first board 61 and the second board 62, and the degree of freedom of the screw A (for example, the usable screw A). From the viewpoint of increasing the number of types), it is desirable that the thickness D60 of the ceiling material 60 is not too thick. Further, from the viewpoint of not applying a load on the strength of the ceiling material 60 and the structural surface of the building 1, it is desirable that the thickness D60 of the ceiling material 60 is not too thick.

In the first embodiment, in consideration of these, the ceiling material 60 is formed so that the thickness D60 is 30 mm. As a result, the thickness D60 of the ceiling material 60 can be prevented from becoming excessively thick. As a result, while improving fire resistance and sound insulation, the weight of the first board 61 and the second board 62 is lightened to make it easier to hold, and further, the degree of freedom of the screw A is improved to improve the workability. Can be done. Further, it is possible to prevent the load from being applied to the strength surface of the ceiling material 60 and the structural surface of the building 1.

As described above, the ceiling structure 10 according to the present embodiment is a ceiling structure 10 including a ceiling material 60 fixed to the ceiling base 30, and the ceiling material 60 is a reinforced gypsum having thicknesses D61 and D62 of 9 mm or more. It is formed by laminating a plurality of boards (first board 61 and second board 62), and is formed so that the total D60 of the thicknesses D61 and D62 of the plurality of reinforced gypsum boards is 35 mm or less. ..

With this structure, the ceiling material 60 can be formed by using a plurality of reinforced gypsum boards having excellent fire resistance and sound insulation. Further, the thickness D60 of the ceiling material 60 can be secured. Thereby, the fire resistance and the sound insulation can be effectively improved.

Further, as the plurality of reinforced gypsum boards, those having the same specifications are used.

With this configuration, the same product (reinforced gypsum board) need only be prepared, so that the cost of the ceiling material 60 can be reduced. Moreover, since it is not necessary to consider the mounting order of the reinforced gypsum board, the labor of construction can be saved.

Further, as the plurality of reinforced gypsum boards, those having a glass fiber net are used.

With such a configuration, the fire resistance can be further improved.

Further, the total thickness D60 of the plurality of reinforced gypsum boards is formed so as to be 30 mm or less.

With such a configuration, the ceiling material 60 can be easily constructed.

Further, the thicknesses D61 and D62 of the plurality of reinforced gypsum boards are formed so as to be 15 mm or more, respectively.

With such a configuration, the fire resistance and sound insulation of the reinforced gypsum board can be improved.

Further, the heat insulating material 40 arranged above the ceiling material 60 is further provided.

With such a configuration, heat insulation and sound insulation can be improved.

Next, the ceiling structure 110 according to the second embodiment will be described.

In the following, the members having the same structure as the ceiling structure 10 according to the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

As shown in FIG. 6, the ceiling structure 110 according to the second embodiment is significantly different from the ceiling structure 10 according to the first embodiment in that the ceiling base 130 is divided across the beam 5. In the following, this difference will be mainly described.

The ceiling structure 110 according to the second embodiment includes a hanging metal fitting 120, a ceiling base 130, a first heat insulating material 140, a moisture-proof sheet 50, a ceiling material 60, a second heat insulating material 170, and a steel plate 180.

The hanging bracket 120 includes a mounting bracket 121 having a substantially Z-shape in front view, a bolt 122 for fixing the ceiling base 130 to the mounting bracket 121, and the like. The lower portion of the mounting bracket 121 is fixed to the lower surface of the girder 5a or the girder 5b, and is provided so as to project outward from the girder 5a or the girder 5b. The upper portion of the mounting bracket 121 is arranged on the outer side of the web of the girder 5a or the girder 5b, and the bolt 122 is inserted therethrough.

In the ceiling base 130, the first frame 131 is arranged on the left side and the right side of the girder 5a, respectively. Further, in the ceiling base 130, the second frame 132 is arranged in front of and behind the beam 5b, respectively. As described above, in the second embodiment, the left and right first frames 131 and the front and rear second frames 132 are not arranged adjacent to each other, but are arranged so that the beam 5 is interposed between the frames 131 and 132. ing. In this way, the ceiling base 130 is divided via the beam 5.

The first frame 131 of the ceiling base 130 is arranged on the left and right outer sides of the girder 5a and below the bolt 122 of the hanging metal fitting 120. The first frame 131 is fixed to the mounting bracket 121 of the hanging bracket 120 via the bolt 122. The first frame 131 is arranged so as to overlap the lower end of the beam 5b in front view (the upper end is located above the lower end of the beam 5b). The second frame 132 is fixed to the first frame 131 so that the lower surface is flush with the lower surface of the first frame 131. In this way, the ceiling base 130 is arranged at a position higher than the ceiling base 30 according to the first embodiment, which is arranged below the beam 5.

The first heat insulating material 140 is placed on the ceiling base 130. Unlike the heat insulating material 40 according to the first embodiment, the first heat insulating material 140 is not laid below the beam 5, and a plurality of the first heat insulating materials 140 are provided so as to sandwich the beam 5.

The second heat insulating material 170 is for heat insulating and sound insulating the space below the beam 5. The second heat insulating material 170 is formed so that the thickness (vertical width) is thinner than the thickness of the first heat insulating material 140 so that it can be laid below the beam 5. The second heat insulating material 170 is laid below the beam 5. Specifically, the second heat insulating material 170 is arranged below the girder 5a between the mounting bracket 121 of the hanging bracket 120 and the steel plate 180 described later. Further, the second heat insulating material 170 is arranged below the beam 5b between the beam 5b and the steel plate 180.

The steel plate 180 is a thin plate-shaped member provided below the beam 5. The steel plate 180 is arranged between the lower surface of the moisture-proof sheet 50 and the upper surface of the ceiling material 60. The steel plate 180 is arranged so as to extend over the divided ceiling base 130. Specifically, the steel plate 180 is arranged so as to extend over the first frame 131 arranged on the left and right sides of the girder 5a (see FIG. 6A), and is arranged in front of and behind the girder 5b. It is arranged so as to extend over the second frame 132 to be arranged (see FIG. 6B). As a result, the steel plate 180 can connect the divided ceiling base 130 and close the space below the beam 5.

In the ceiling structure 110 according to the second embodiment configured as described above, the ceiling material 60 is fixed to the ceiling base 130 whose height position is raised until it overlaps with the beam 5, thereby fixing the ceiling material 60 to the ceiling surface (ceiling material). The lower surface of 60) is made higher than the ceiling surface according to the first embodiment. As a result, even when the floor height (distance between the floor surfaces of two adjacent floors) is relatively low, the ceiling height (distance between the ceiling surface and the floor surface) can be secured. As a result, the resident of the building 1 can be given a feeling of openness.

Here, when the ceiling base 130 is divided across the beam 5, the first frame 131 and the second frame 132 are not arranged below the beam 5, and the fire resistance and heat insulating property below the beam 5 are localized. In the second embodiment, the steel plate 180 is arranged at the location where there is a possibility that the temperature may decrease. As a result, the ceiling surface can be raised, and local deterioration of fire resistance and heat insulating property can be suppressed. Further, by laying a second heat insulating material 170 of an appropriate size under the beam 5 in which the first heat insulating material 140 cannot be laid, the space below the beam 5 can be heat-insulated and sound-insulated. Thereby, the heat insulating property and the sound insulating property can be effectively improved.

As described above, in the ceiling structure 110 according to the second embodiment, the ceiling base 130 is divided across the beam 5, and the ceiling structure 110 is divided below the beam 5. It further includes a steel plate 180 (connecting member) for connecting the 130.

With such a configuration, the divided ceiling base 130 can be reinforced. Further, by arranging the ceiling base 130 so as to overlap the beam 5 as in the second embodiment, the ceiling surface can be raised and the divided ceiling base 130 can be reinforced.

The steel plate 180 according to the second embodiment is an embodiment of the connecting member.

Although the embodiment of the ceiling structure has been described above, the structure of the ceiling structure is not limited to the above configuration, and various modifications can be made within the scope of the invention described in the claims.

For example, the ceiling structures 10 and 110 according to the first embodiment and the second embodiment are applied to an apartment house, but the building 1 to which the ceiling structure 10 and 110 is applied is limited to an apartment house. For example, it may be a detached house or the like. Further, the building 1 does not necessarily have to be a two-story building, but may be a one-story building or a building having three or more floors.

Further, the ceiling material 60 according to the first embodiment and the second embodiment may have a plurality of reinforced gypsum boards laminated, and the number of laminated gypsum boards is not limited.

Further, the first board 61 and the second board 62 according to the first embodiment and the second embodiment are assumed to have the same specifications, but are not limited to these and have different specifications. It may be one.

Further, the thicknesses D61 and D62 of the first board 61 and the second board 62 according to the first embodiment and the second embodiment are each 15 mm, but if it is 9 mm or more, the thickness is limited to this. is not.

Further, the thickness D60 of the ceiling material 60 (total of the thicknesses D1 and D2 of the first board 61 and the second board 62) according to the first embodiment and the second embodiment is assumed to be 30 mm, but is 35 mm or less. If so, it is not limited to this.

Further, the first board 61 and the second board 62 according to the first embodiment and the second embodiment are assumed to be reinforced gypsum boards containing a glass fiber net, but those to be put in the core material are limited to the glass fiber net. Other materials may be included instead of being made.

Further, the ceiling structures 10 and 110 according to the first embodiment and the second embodiment are provided with the moisture-proof sheet 50 and the heat insulating materials 40, 140, 170, but the present invention is not limited to this, and the moisture-proof sheet is not limited thereto. 50, the heat insulating material 40, 140, 170 may not be provided. As a result, the number of parts can be reduced and the cost can be reduced.

Further, the height relationship between the ceiling bases 30 and 130 and the beam 5 is not limited to the first embodiment and the second embodiment, and may be any relationship. The height relationship between the ceiling bases 30 and 130 and the beam 5 may be appropriately changed depending on, for example, the floor height, the height of the ceiling surface (distance between the ceiling surface and the floor surface), and the like. Specifically, the ceiling structure 210 according to the modified example shown in FIG. 7 can be configured.

The ceiling structure 210 according to the modified example includes a hanging metal fitting 20, a ceiling base 230, a first heat insulating material 240, a moisture-proof sheet 50, a ceiling material 60, and a second heat insulating material 270. The ceiling base 230 is arranged below the beam 5 and at a position so high that the first heat insulating material 240 cannot be laid below the beam 5. In this way, the ceiling base 230 is formed so as to be higher than the ceiling base 30 according to the first embodiment and lower than the ceiling base 130 according to the second embodiment. In the modified example, the first heat insulating material 240 is placed on the ceiling base 230, and a plurality of the first heat insulating materials 240 are provided with the beam 5 interposed therebetween. The second heat insulating material 270 is provided below the beam 5b (between the lower surface of the beam 5b and the upper surface of the moisture-proof sheet 50). According to the ceiling structure 210 according to the modified example, the height of the ceiling can be increased without dividing the ceiling base 230.

10 Ceiling structure 60 Ceiling material 61 First board (reinforced gypsum board)
62 Second board (reinforced gypsum board)
D61 First board thickness (thickness of reinforced gypsum board)
D62 Second board thickness (thickness of reinforced gypsum board)
D60 Ceiling material thickness (total thickness of reinforced gypsum board)

Claims (7)

It is a ceiling structure provided with a ceiling material fixed to the ceiling base.
The ceiling material is
It is formed by laminating a plurality of reinforced gypsum boards having a thickness of 9 mm or more, and is formed so that the total thickness of the plurality of reinforced gypsum boards is 35 mm or less.
Ceiling structure. The plurality of reinforced gypsum boards
Those with the same specifications are used,
The ceiling structure according to claim 1. The plurality of reinforced gypsum boards
Each one with a glass fiber net is used,
The ceiling structure according to claim 1 or 2. The total thickness of the plurality of reinforced gypsum boards is
Formed to be 30 mm or less,
The ceiling structure according to any one of claims 1 to 3. The thickness of the plurality of reinforced gypsum boards is
Each is formed so as to be 15 mm or more.
The ceiling structure according to any one of claims 1 to 4. Further comprising a heat insulating material arranged above the ceiling material.
The ceiling structure according to any one of claims 1 to 5. The ceiling base is
It is divided across the beam,
The ceiling structure
Below the beam, a connecting member for connecting the divided ceiling bases is further provided.
The ceiling structure according to any one of claims 1 to 6.

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