Seismic reinforcement structure for suspended ceilings and construction method for seismic reinforcement structure for suspended ceilings

Abstract

To provide an aseismic reinforcing structure of a suspended ceiling and a construction method of an aseismic reinforcing structure of a suspended ceiling which can be constructed without disassembling an existing suspended ceiling.SOLUTION: An aseismic reinforcing structure 200 of a suspended ceiling having a ceiling backing material supported by a ceiling structure, which has a plurality of existing ceiling beams 12 extending in a first direction X, and a plurality of horizontal materials 13 which are horizontally installed on the plurality of ceiling beams 12, and extend in a second direction Y that is perpendicular to the first direction X and along a horizontal surface, includes a horizontal reinforcing body 3 for connecting the plurality of horizontal materials 13, and a vertical reinforcing body 4 for connecting the horizontal materials 13 and the ceiling backing material 16.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a seismic reinforcement structure for a suspended ceiling and a construction method of the seismic reinforcement structure for a suspended ceiling.

Background Art

[0002] Conventionally, a suspended ceiling such as a so-called grape trellis has been known (see Patent Document 1 below). In a suspended ceiling, it is likely to sway horizontally due to the horizontal force acting during an earthquake, and it may be desirable to perform seismic reinforcement assuming an earthquake exceeding the design standard at the time of construction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When performing seismic reinforcement work, if the existing ceiling is disassembled, it will be a large-scale project, and there is a risk that the construction period will be prolonged.

[0005] Therefore, the present invention has been made in view of the above circumstances, and provides a seismic reinforcement structure for a suspended ceiling and a construction method of the seismic reinforcement structure for a suspended ceiling that can be constructed without disassembling the existing suspended ceiling.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention employs the following means. In other words, the seismic reinforcement structure for a suspended ceiling according to the present invention is a ceiling reinforcement structure for a suspended ceiling that includes a ceiling base material supported by a ceiling structure having a plurality of existing ceiling beams extending in a first direction and a plurality of horizontal members horizontally mounted on the plurality of ceiling beams and extending in a second direction perpendicular to the first direction and along a horizontal plane, and comprises a horizontal reinforcing body that connects the plurality of horizontal members to each other and a vertical reinforcing body that connects the horizontal members to the ceiling base material.

[0007] In this type of seismic reinforcement structure for ceilings, existing ceiling beams and horizontal members are utilized without dismantling them. Multiple horizontal members are connected to each other with horizontal reinforcement bodies, and the horizontal members are connected to the ceiling substructure with vertical reinforcement bodies. Therefore, seismic reinforcement can be carried out without dismantling the existing suspended ceiling.

[0008] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the horizontal reinforcement body may have a reinforcing beam, which is a steel member that connects adjacent horizontal members and extends in the first direction.

[0009] In this type of seismic reinforcement structure for ceilings, steel reinforcing beams are used to connect adjacent horizontal members for seismic reinforcement. Therefore, the length of the reinforcing beams only needs to be about the same as the distance between adjacent horizontal members, allowing the reinforcing beams to be brought into the ceiling space by making small openings in the ceiling substrate.

[0010] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the horizontal reinforcement body may have a first horizontal brace made of steel that connects adjacent reinforcement beams in the second direction, extends in a direction intersecting the first and second directions and along the horizontal plane.

[0011] In this type of seismic reinforcement structure for ceilings, a first horizontal steel brace connects adjacent reinforcing beams in the second direction to provide seismic reinforcement. Therefore, the length of the first horizontal brace only needs to be slightly longer than the distance between adjacent reinforcing beams in the second direction, allowing the first horizontal brace to be brought into the ceiling space by making a small opening in the ceiling substrate.

[0012] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the horizontal reinforcement body may have a second horizontal brace made of steel, which connects the horizontal member and the reinforcing beam, extends in a direction intersecting the first and second directions and along the horizontal plane.

[0013] In this type of seismic reinforcement structure for ceilings, a second horizontal brace made of steel is used to connect the horizontal members and the reinforcing beams for seismic reinforcement. Therefore, the length of the second horizontal brace only needs to be slightly longer than the distance between the horizontal members and the reinforcing beams, allowing the second horizontal brace to be brought into the ceiling space by making a small opening in the ceiling substrate.

[0014] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the vertical reinforcement body may have a suspension member, which is a steel member extending vertically, connecting the horizontal member and the ceiling base material.

[0015] In this type of seismic reinforcement structure for ceilings, steel suspension members are used to connect the horizontal members and the ceiling substructure for seismic reinforcement. Therefore, the length of the suspension members only needs to be about the same as the distance between the horizontal members and the ceiling substructure, allowing the suspension members to be brought into the ceiling space by making small openings in the ceiling substructure.

[0016] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the vertical reinforcement body may have a vertical brace, which is a steel member that connects the upper part of one of the adjacent suspended members to the lower part of the other suspended member.

[0017] In this type of seismic reinforcement structure for ceilings, vertical steel braces are used to connect the upper part of one adjacent suspension member to the lower part of the other, thereby reinforcing the ceiling against earthquakes. Therefore, the length of the vertical braces only needs to be slightly longer than the distance between adjacent suspension members, allowing the vertical braces to be brought into the ceiling space by making a small opening in the ceiling substrate.

[0018] Furthermore, in the seismic reinforcement structure for suspended ceilings according to the present invention, the steel frame members may be joined to the connected members by self-drilling screws.

[0019] In the seismic reinforcement structure of the ceiling configured as described above, the steel members are joined to the members to be joined by drill screw joining. Therefore, it is possible to prevent the occurrence of fire due to welding, and it is possible to reduce the labor of fastening bolts to nuts by bolt joining.

[0020] Moreover, the construction method of the seismic reinforcement structure of the suspended ceiling according to the present invention is the construction method of the reinforcement structure of the suspended ceiling described above, wherein an opening is formed in the ceiling base material, and a scaffold, the horizontal reinforcement, and the vertical reinforcement are carried into the ceiling through the opening, the horizontal reinforcement is used to connect the plurality of transverse members to each other, and the vertical reinforcement is used to connect the transverse member and the ceiling base material.

[0021] In the construction method of the seismic reinforcement structure of the ceiling configured as described above, the horizontal reinforcement and the vertical reinforcement are carried into the ceiling space through a small opening formed in the ceiling base material. The existing ceiling beams and transverse members are utilized without being disassembled, the horizontal reinforcement is used to connect the plurality of transverse members to each other, and the vertical reinforcement is used to connect the transverse member and the ceiling base material. Therefore, seismic reinforcement can be constructed without disassembling the existing suspended ceiling.

Effect of the Invention

[0022] According to the seismic reinforcement structure of the suspended ceiling and the construction method of the seismic reinforcement structure of the suspended ceiling according to the present invention, construction can be carried out without disassembling the existing suspended ceiling.

Brief Description of the Drawings

[0023] [Figure 1] It is a vertical cross-sectional view showing the structure of an existing suspended ceiling. [Figure 2] It is a vertical cross-sectional view showing the seismic reinforcement structure of the suspended ceiling according to an embodiment of the present invention. [Figure 3] It is a view taken in the direction of arrow III in FIG. 2. [Figure 4] It is a cross-sectional view taken along line IV-IV in FIG. 3. [Figure 5]This diagram illustrates a method for constructing a seismic reinforcement structure for a suspended ceiling according to one embodiment of the present invention. [Modes for carrying out the invention]

[0024] An embodiment of the present invention will be described with reference to drawings, illustrating a seismic reinforcement structure for a suspended ceiling and a construction method for such a structure.

[0025] First, we will describe the structure of an existing suspended ceiling before the seismic reinforcement structure of this embodiment was applied. Figure 1 is a vertical cross-sectional view showing the structure of an existing suspended ceiling. As shown in Figure 1, the existing suspended ceiling structure 100 according to this embodiment is installed in a building such as a movie theater 1. The existing suspended ceiling structure 100 has a ceiling structure 11 and a ceiling base material 16.

[0026] In the horizontal direction of Figure 1, the left and right sides of the paper are defined as direction X (first direction), and the direction perpendicular to direction X is defined as direction Y (second direction).

[0027] The ceiling structure 11 is supported by an upper structure 18, such as a roof structure, and by support members 19, such as braces. The ceiling structure 11 has a plurality of ceiling beams 12 and a plurality of horizontal members 13.

[0028] The ceiling beams 12 extend in direction X. Multiple ceiling beams 12 are arranged at intervals in direction Y. The ceiling beams 12 are formed from steel materials such as H-shaped steel.

[0029] The horizontal members 13 extend in the direction Y. Multiple horizontal members 13 are arranged at intervals in the direction X. The horizontal members 13 are formed from steel materials such as C-shaped steel. The horizontal members 13 are joined to the ceiling beams 12.

[0030] The ceiling base material 16 is suspended from the ceiling structure 11 by support members such as suspension members (not shown). The ceiling finishing material 17 is attached to the underside of the ceiling base material 16.

[0031] Next, we will describe the seismic reinforcement structure 200 for the suspended ceiling according to this embodiment, which is an existing suspended ceiling structure 100 that has been reinforced against earthquakes. Figure 2 is a vertical cross-sectional view showing the seismic reinforcement structure 200 for the suspended ceiling. As shown in Figure 2, the seismic reinforcement structure 200 for the suspended ceiling is installed in the ceiling space S above the ceiling base material 16 and below the structural element 18, while leaving the existing suspended ceiling structure 100 intact. The seismic reinforcement structure 200 comprises a horizontal reinforcement body 3 and a vertical reinforcement body 4.

[0032] Figure 3 is a view from arrow III in Figure 2. As shown in Figure 3, the horizontal reinforcement 3 connects multiple horizontal members 13 together. The horizontal reinforcement 3 reinforces the existing suspended ceiling structure 100 in a planar manner along the horizontal plane.

[0033] The horizontal reinforcement body 3 comprises a plurality of reinforcing beams 31, a plurality of first horizontal braces 32, and a plurality of second horizontal braces 33.

[0034] The reinforcing beam 31 connects adjacent horizontal members 13 in direction X. The reinforcing beam 31 extends in direction X. The length of the reinforcing beam 31 is a short member, approximately the distance between adjacent horizontal members 13 in direction X. Multiple reinforcing beams 31 are arranged at intervals in direction Y. The reinforcing beam 31 is formed from a steel material such as C-shaped steel.

[0035] The longitudinal ends of the reinforcing beam 31 are positioned to face the side surface of the horizontal member 13. The reinforcing beam 31 is joined to the horizontal member 13 by self-drilling screws, for example, via a connecting plate 31a provided at the longitudinal end.

[0036] The first horizontal brace 32 connects adjacent reinforcing beams 31 in direction Y. The first horizontal brace 32 extends in a direction along the horizontal plane and in a direction intersecting directions X and Y. The length of the first horizontal brace 32 is a short member, slightly longer than the distance between adjacent reinforcing beams 31 in direction Y. Multiple first horizontal braces 32 are arranged with intervals in directions X and Y. The first horizontal brace 32 is formed from a steel material such as C-shaped steel.

[0037] The longitudinal ends of the first horizontal brace 32 are positioned above the reinforcing beam 31. The ends of the first horizontal brace 32 are joined to the first horizontal brace 32 by self-drilling screw connections.

[0038] The second horizontal brace 33 connects the horizontal member 13 and the reinforcing beam 31. The second horizontal brace 33 extends in a direction along the horizontal plane and in a direction intersecting directions X and Y. The length of the second horizontal brace 33 is a short member, slightly longer than the spacing between adjacent reinforcing beams 31 in direction Y and the spacing between adjacent horizontal members 13 in direction X. Multiple second horizontal braces 33 are arranged with spacing in directions X and Y. The second horizontal brace 33 is formed of steel material such as C-shaped steel.

[0039] One end of the second horizontal brace 33 in the longitudinal direction is positioned above the reinforcing beam 31. The other end of the second horizontal brace 33 is joined to the first horizontal brace 32 by a self-drilling screw connection.

[0040] A connecting plate 33a is joined to the other end of the second horizontal brace 33 in the longitudinal direction, for example, by self-drilling screws. The connecting plate 33a is joined to the horizontal member 13 by self-drilling screws.

[0041] Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. As shown in Figure 4, the vertical reinforcement 4 connects the horizontal members 13 and the ceiling base material 16. The vertical reinforcement 4 reinforces the existing suspended ceiling structure 100 in a planar manner along the vertical plane.

[0042] The vertical reinforcement body 4 includes a suspension member 41 and a vertical brace 42.

[0043] The suspension members 41 connect the horizontal members 13 and the ceiling substructure 16. The suspension members 41 extend vertically. The length of the suspension members 41 is short, slightly longer than the distance between the horizontal members 13 and the ceiling substructure 16. Multiple suspension members 41 are arranged with spacing in the X and Y directions. The suspension members 41 are made of steel material, such as square steel pipes.

[0044] The upper end of the suspension member 41 is joined to the horizontal member 13 by self-drilling screws. The lower end of the suspension member 41 is joined to the ceiling base material 16 by self-drilling screws.

[0045] The vertical brace 42 connects adjacent suspension members 41 in the X and Y directions. The vertical brace 42 connects the upper part of one suspension member 41 to the lower part of the other suspension member 41. The vertical brace 42 is made of steel material such as C-shaped steel. The ends of the suspension members 41 are joined to the suspension members 41 by self-drilling screws.

[0046] Next, we will explain the construction method for the above-mentioned seismic reinforcement structure 200 for suspended ceilings. Figure 5 is a diagram illustrating the construction method of the seismic reinforcement structure 200 for suspended ceilings. As shown in Figure 5, the seats s1 of the movie theater 1 are covered with protective sheets s2 or the like for protection. Small openings 21 are made in part of the ceiling base material 16 and ceiling finishing material 17. The size of the openings 21 should be such that short members such as the reinforcing beams 31, first horizontal braces 32, second horizontal braces 33, suspension members 41 and vertical braces 42, which will be described later, can be brought into the ceiling space S.

[0047] Scaffolding 22 is set up to reach opening 21. Scaffolding 23, to be installed in the ceiling space S, is brought in through opening 21. The size of the components constituting scaffolding 23 is such that they can be brought in through opening 21. Scaffolding 23 is installed using the ceiling beams 12 and horizontal members 13 within the ceiling space S.

[0048] Members such as the reinforcing beam 31, the first horizontal brace 32, the second horizontal brace 33, the suspension member 41, and the vertical brace 42 are brought into the ceiling space S through the opening 21.

[0049] The suspension members 41 connect the horizontal members 13 and the ceiling substructure members 16. The vertical braces 42 connect adjacent suspension members 41. The reinforcing beams 31 connect adjacent horizontal members 13. The first horizontal braces 32 connect adjacent reinforcing beams 31. The second horizontal braces 33 connect the horizontal members 13 and the reinforcing beams 31.

[0050] Once the work inside the ceiling space S is completed, the scaffolding 23 is dismantled and removed through the opening 21, and after the opening 21 is closed, the scaffolding 22 is dismantled.

[0051] In the suspended ceiling seismic reinforcement structure 200 and the construction method for the suspended ceiling seismic reinforcement structure 200 configured in this way, the existing ceiling beams 12 and horizontal members 13 are utilized without dismantling them. Multiple horizontal members 13 are connected to each other with horizontal reinforcement bodies 3, and the horizontal members 13 and ceiling base materials 16 are connected with vertical reinforcement bodies 4. Therefore, seismic reinforcement can be carried out without dismantling the existing suspended ceiling.

[0052] Furthermore, reinforcing beams 31 made of steel are used to connect adjacent horizontal members 13 for seismic reinforcement. Therefore, the length of the reinforcing beams 31 only needs to be about the same as the distance between adjacent horizontal members 13, so a small opening 21 can be made in the ceiling base material 16 to bring the reinforcing beams 31 into the ceiling space S.

[0053] Furthermore, a first horizontal brace 32 made of steel is used to connect adjacent reinforcing beams 31 in direction Y, thereby providing seismic reinforcement. Therefore, the length of the first horizontal brace 32 only needs to be slightly longer than the distance between adjacent reinforcing beams 31 in direction Y, allowing the first horizontal brace 32 to be brought into the ceiling space S by making a small opening 21 in the ceiling base material 16.

[0054] Furthermore, a second horizontal brace 33 made of steel is used to connect the horizontal members 13 and the reinforcing beam 31 for seismic reinforcement. Therefore, the length of the second horizontal brace 33 only needs to be slightly longer than the distance between it and the horizontal members 13, allowing the second horizontal brace 33 to be brought into the ceiling space S by making a small opening 21 in the ceiling base material 16.

[0055] Furthermore, a steel suspension member 41 is used to connect the horizontal member 13 and the ceiling substructure 16 for seismic reinforcement. Therefore, the length of the suspension member 41 only needs to be about the same as the distance between the horizontal member 13 and the ceiling substructure 16, allowing the suspension member 41 to be brought into the ceiling space S by making a small opening 21 in the ceiling substructure 16.

[0056] Furthermore, a steel vertical brace 42 is used to connect the upper part of one of the adjacent suspension members 41 to the lower part of the other suspension member 41, thereby reinforcing the structure against earthquakes. Therefore, the length of the vertical brace 42 only needs to be slightly longer than the distance between adjacent suspension members 41, allowing the vertical brace 42 to be brought into the ceiling space S by making a small opening 21 in the ceiling base material 16.

[0057] Furthermore, the steel members are joined to the connected members using self-drilling screws. This prevents the occurrence of fires caused by welding and reduces the effort required to fasten bolts to nuts, which is necessary with bolted connections.

[0058] It should be noted that the assembly procedure, or the various shapes and combinations of each component shown in the above-described embodiment, are merely examples and can be modified in various ways based on design requirements, etc., without departing from the spirit of the present invention.

[0059] The Sustainable Development Goals (SDGs) are among the 17 international goals adopted at the UN Summit in September 2015. The seismic reinforcement structure 200 for suspended ceilings according to this embodiment can contribute to achieving some of the 17 SDGs, such as Goal 11, "Make cities and human settlements inclusive, safe, resilient and sustainable." [Explanation of Symbols]

[0060] 3. Horizontal reinforcement 4. Vertical reinforcement 11 Ceiling Structure 12 Ceiling beams 13 Horizontal members 16 Ceiling underlayment 21 Aperture 31 Reinforcement beams 32. First horizontal brace 33. Second horizontal brace 41 Hanging material 42 Vertical braces 100 Existing suspended ceiling structure 200 Seismic reinforcement structure for suspended ceilings X 1st direction Y Second direction

Claims

1. A seismic reinforcement structure for a suspended ceiling comprising a ceiling base material supported by a ceiling structure having a plurality of existing ceiling beams extending in a first direction, and a plurality of horizontal members horizontally mounted on the plurality of ceiling beams and extending in a second direction perpendicular to the first direction and along a horizontal plane, A horizontal reinforcing body that connects the aforementioned multiple horizontal members, It comprises a vertical reinforcing member that connects the horizontal member and the ceiling base material, The horizontal reinforcing body is The adjacent horizontal members are connected and have reinforcing beams which are steel members extending in the first direction, The horizontal reinforcing body is A seismic reinforcement structure for a suspended ceiling, comprising a first horizontal brace made of steel, which connects adjacent reinforcing beams in the second direction and extends in a direction intersecting the first and second directions and along the horizontal plane.

2. A seismic reinforcement structure for a suspended ceiling comprising a ceiling base material supported by a ceiling structure having a plurality of existing ceiling beams extending in a first direction, and a plurality of horizontal members horizontally mounted on the plurality of ceiling beams and extending in a second direction perpendicular to the first direction and along a horizontal plane, A horizontal reinforcing body that connects the aforementioned multiple horizontal members, It comprises a vertical reinforcing member that connects the horizontal member and the ceiling base material, The horizontal reinforcing body is The adjacent horizontal members are connected and have reinforcing beams which are steel members extending in the first direction, The horizontal reinforcing body is A seismic reinforcement structure for a suspended ceiling, which connects the horizontal member and the reinforcing beam, and has a second horizontal brace made of steel, extending in a direction that intersects the first and second directions and along the horizontal plane.

3. A seismic reinforcement structure for a suspended ceiling comprising a ceiling base material supported by a ceiling structure having a plurality of existing ceiling beams extending in a first direction, and a plurality of horizontal members horizontally mounted on the plurality of ceiling beams and extending in a second direction perpendicular to the first direction and along a horizontal plane, A horizontal reinforcing body that connects the aforementioned multiple horizontal members, It comprises a vertical reinforcing member that connects the horizontal member and the ceiling base material, The aforementioned vertical reinforcement body is The horizontal member and the ceiling base material are connected by a suspension member, which is a steel frame member extending vertically. The aforementioned vertical reinforcement body is A seismic reinforcement structure for a suspended ceiling having a vertical brace, which is a steel member connecting the upper part of one of the adjacent suspended members to the lower part of the other suspended member.

4. The seismic reinforcement structure for a suspended ceiling according to claim 1 or 2, wherein the steel frame member is joined to the connected member by self-drilling screw connections.

5. A seismic reinforcement structure for a suspended ceiling, comprising a ceiling base material supported by a ceiling structure having a plurality of existing ceiling beams extending in a first direction, and a plurality of horizontal members horizontally mounted on the plurality of ceiling beams and extending in a direction perpendicular to the first direction and along a horizontal plane, A horizontal reinforcing body that connects the aforementioned multiple horizontal members, A method for constructing a seismic reinforcement structure for a suspended ceiling, comprising a vertical reinforcing member connecting the horizontal member and the ceiling base material, An opening is formed in the aforementioned ceiling substrate material, The scaffolding, the horizontal reinforcing body, and the vertical reinforcing body are brought into the ceiling through the aforementioned opening. The horizontal reinforcing members connect the multiple horizontal members, A method for constructing a seismic reinforcement structure for a suspended ceiling, wherein the vertical reinforcement body connects the horizontal members and the ceiling base material.

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