JP2018178708A - Suspended ceiling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspended ceiling structure capable of reducing the amount of ceiling base while ensuring seismic performance, reducing the cost, and more reliably preventing the ceiling material from falling off. SOLUTION: A plurality of first support members 1 which are arranged side by side in a horizontal one direction T1 at a predetermined interval and extend in another direction T2, and a plurality of first support members 1 which are arranged side by side at a predetermined interval in the other direction and are arranged in one direction. A ceiling base 4 formed in a grid pattern by assembling a plurality of extending second support members 3, a hanging member that suspends and supports the ceiling base, and a plate that is fixed to the lower surface of the ceiling base with screws to form a ceiling surface. It is provided with a shaped ceiling material 6 and a reinforcing brace 7 that is directly or indirectly connected to the ceiling base and is attached by driving the ceiling material into the ceiling base while penetrating the ceiling material from below. The first support member and the second support member are each formed in an inverted T-shape in cross section, and the distance M between the first support members is set to 910 mm and the distance N between the second support members is set to 455 mm. [Selection diagram] Fig. 4

Description

  The present invention relates to the structure of a suspended ceiling.

  Conventionally, for example, suspended ceilings are often used as ceilings of buildings such as schools, hospitals, production facilities, gymnasiums, swimming pools, airport terminal buildings, office buildings, theaters, and sinecons (see, for example, Patent Document 1 and Patent Document 2) . Then, on the suspended ceiling (suspended ceiling structure) A, as shown in FIG. 1, a plurality of T extending in the other direction T2 orthogonal to the one direction T1 are provided side by side at a predetermined interval in one horizontal direction T1. A plurality of suspension bolts (suspension members) 2 disposed so that the bar (support member with cross section reverse T-shape) 1 and the upper end are fixed to the upper structure and the lower end side is connected to the T bar 1 A crossbar T-shaped connecting bar (cross bar) 3 extending in one horizontal direction T1 so as to bridge over and arranged at a predetermined interval in the other direction T2, and a grid consisting of T bars 1 and connecting bars 3 And a ceiling panel (ceiling material) 6 such as a gypsum board that is integrally attached to the ceiling base 4 to form a ceiling surface (ceiling portion 5).

  Further, in the above suspended ceiling A, due to its structure, it is easy to roll due to horizontal force acting at the time of earthquake, and this rolling causes the end of the ceiling 5 to collide with building components such as walls, pillars and beams. The ceiling panel 6 may be damaged or dropped. Therefore, conventionally, for example, as shown in FIG. 2 and FIG. 3, the upper end side is connected to the upper structure etc., and the lower end side is assembled in a grid shape with steel materials such as the suspension bolt 2, T bar 1 and connection bar 3 The reinforcement brace 7 is provided so as to connect to the ceiling base 4 and the lateral movement of the ceiling 5 consisting of the ceiling base 4 and the ceiling panel 6 during an earthquake is suppressed.

JP, 2008-121371, A JP 2005-350950 A

  On the other hand, in the above suspended ceiling A, there are many cases where the ceiling panel 6 is formed of 910 mm × 1820 mm of Japanese specification, and accordingly, the ceiling base 4 consisting of the T-bar 1 and the connecting bar 3 is 455 mm It is made to assemble | attach and form by pitch (The space | interval of adjacent T-bars 1 and the space | interval of adjacent connection bars 3). And, in this case, the amount of the expensive member (T-bar 1) increases (the amount of base for the ceiling) compared to the member (connecting bar 3) defined in JIS A 6217, and there is a problem that the cost is increased. .

  Further, in the above suspended ceiling A, external forces of both horizontal force and vertical force repeatedly act around the reinforcing brace 7 at the time of an earthquake. On the other hand, generally, a screw is driven at a pitch of 150 to 225 mm, and an external force is repeatedly applied to the ceiling panel 6 around the reinforcing brace 7 screwed to the ceiling base 4 to cause screw head omission etc. There was a risk of the panel 6 falling off.

  In view of the above-described circumstances, the present invention aims to provide a suspended ceiling structure capable of reducing the amount of ceiling foundation while securing seismic performance, achieving cost reduction, and more reliably suppressing the falling off of the ceiling material. I assume.

  In order to achieve the above object, the present invention provides the following means.

  The suspended ceiling structure according to the present invention is provided side by side at a predetermined interval in one horizontal direction, and has a plurality of first support members extending in the other direction orthogonal to the one direction and a predetermined interval in the other direction. Ceiling foundation formed in a lattice shape by assembling the plurality of second support members extending in one direction, the upper end is connected to the upper structure of the building, the lower end is connected to the ceiling foundation, and the ceiling base is A suspension member for suspension and support, a plate-like ceiling material fixed to the lower surface of the ceiling base with a screw to form a ceiling surface, an upper end as the upper structure, and a lower end as the ceiling base, respectively And a reinforcing brace disposed indirectly connected to the ceiling base material, and the ceiling material is attached to the ceiling foundation while penetrating the ceiling material from below and attached to the ceiling foundation, and the first support member The second support members are respectively reverse in cross section When the distance between the adjacent first support members is M and the distance between the adjacent second support members is N, the ceiling base is formed so that M: N = 2: 1. The distance M between the first support members is 910 mm, and the distance N between the second support members is 455 mm.

  Further, in the suspended ceiling structure of the present invention, the first support member is configured to have a larger thickness than the second support member, and the plate thickness of the first support member is 0.5 mm, the second support Preferably, the thickness of the member is 0.4 mm.

  Further, in the suspended ceiling structure of the present invention, it is preferable that the number of installed screws of the reinforcement effective range by connecting the lower ends of the reinforcement braces be larger than that of other parts.

  Further, in the suspended ceiling structure of the present invention, it is desirable that the number of installation screws of the reinforcement effective range by connecting the lower ends of the reinforcement braces be doubled as compared with other parts.

  In the suspended ceiling structure of the present invention, when the distance between adjacent first support members is M and the distance between adjacent second support members is N, a ceiling base is formed so that M: N = 2: 1. Compared to the case where the conventional T-bar (the first support member) and the connecting bar (the second support member) form a ceiling base with a pitch of 455 mm, the total material of the ceiling base (the ceiling base) is It can be reduced.

For example, a heavy duty member with a thickness of 0.5 mm is used as the first support member (T-bar), and an intermediate member with a thickness of 0.4 mm is used as the second support member (connection bar) to configure the ceiling base. Even in this case, it is possible to obtain the ceiling surface rigidity sufficient to secure the earthquake resistance performance of 20 kgf (196 N) / m ² (the weight of the ceiling material) × 1.5 G (earthquake acceleration) or more. Therefore, cost reduction can be achieved.

  Also, conventionally, while the ceiling material is screwed to the ceiling base at a pitch of 150 to 225 mm, by additionally driving screws in the reinforcement effective range around the reinforcement brace, for example, horizontal around the connection portion of the reinforcement brace at the time of earthquake Even when the force and vertical force are repeatedly applied and the reinforcing braces are buckled beyond the elastic range, it is possible to suppress the falling off of the ceiling material due to screw head missing or the like.

  Therefore, in the suspended ceiling structure of the present invention, it is possible to reduce the amount of the ceiling base while securing the seismic performance, to reduce the cost, and to more reliably suppress the falling of the ceiling material.

It is a perspective view from the ceiling side showing a suspended ceiling structure according to an embodiment of the present invention. It is a perspective view from the ceiling back side showing a suspended ceiling structure concerning one embodiment of the present invention. It is a perspective view which shows an example of the connection part of the reinforcement brace of the suspension ceiling structure which concerns on one Embodiment of this invention. It is a plane view showing a suspended ceiling structure concerning one embodiment of the present invention. It is a top view which shows the reinforcement effective range of the reinforcement brace of the suspension ceiling structure which concerns on one Embodiment of this invention.

  Hereinafter, a suspended ceiling structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  As shown in FIGS. 1 and 2, the suspended ceiling structure B of this embodiment is provided in parallel at a predetermined interval in one horizontal direction T1, and extends in the other direction T2 orthogonal to the one direction T1. A bar (first support member with cross section reverse T-shape) 1 and a plurality of suspension bolts (suspension members) 2 disposed with the upper end fixed to the upper structure and the lower end connected to the T bar 1 and horizontal A plurality of connecting bars (cross bar, cross section reverse T-shaped, extending in one direction T1, bridging over T-bar 1 and being arranged in connection with each other in the other direction T2) 2) A supporting member 3) and a ceiling panel (ceiling material) 6 which is screwed to the ceiling base 4 and integrally attached to form a ceiling surface (ceiling portion 5). Moreover, the ceiling base 4 is comprised by T-bar 1 and the connection bar 3, ie, the steel materials assembled | attached in grid | lattice form.

  Further, as shown in FIG. 2 and FIG. 3, in the present embodiment, the lower end is connected via a gusset plate or the like in the vicinity of the connecting portion of the T bar 1 and the connecting bar 3, and the reinforcing brace 7 is provided. At this time, in the present embodiment, for example, a pair of reinforcing braces 7 may be juxtaposed in one direction T1 so as to exhibit a V-shape, and further, a pair of V-shaped reinforcement braces juxtaposed in one direction T1. A pair of reinforcement braces 7 are arranged side by side in the other direction T2 so as to exhibit a V-shape with the intersection points of the lower ends of 7 and the mutual intersections at the same position, or reinforcements extending diagonally with reinforcement braces 7 extending in the vertical direction The brace 7 is arranged to have a square shape.

  Then, in the present embodiment, a lightweight ceiling panel 6 such as, for example, a direct-adhered rock-cotton sound-absorbing plate is fixed to the lower surface of the ceiling base 4 by penetrating a screw from below to the ceiling panel 6 and the ceiling base 4. ing. Thus, the ceiling surface is formed by fixing the plurality of ceiling panels 6 to the ceiling base 4 using a screw.

  On the other hand, in the suspended ceiling structure B of the present embodiment, as shown in FIG. 4, first, the spacing N between adjacent connection bars 3 is set to 455 mm as in the conventional case (arranged at 455 mm pitch), The distance M between adjacent T-bars 1 is set to 910 mm (arranged at 910 mm pitch) and assembled to form a grid-like ceiling base 4. That is, in the suspended ceiling structure B of the present embodiment, the ratio of the distance M between the adjacent T bars (first support members) 1 to the distance N between the adjacent connection bars (second support members) 3 is M: It is formed as N = 2: 1.

  Thereby, in suspended ceiling structure B of this embodiment, compared with the case where conventional T bar 1 and connecting bar 3 constitute ceiling foundation 4 by 455 mm pitch, the total material amount of ceiling foundation 4 can be reduced, and For example, the ceiling base 4 can be configured using a heavy duty member having a thickness of 0.5 mm as the T-bar 1 and using an intermediate member having a thickness of 0.4 mm as the connection bar 3. It is possible to achieve costing.

In addition, in the case of such a configuration, obtain a ceiling surface rigidity sufficient to secure aseismatic performance of 20 kgf (196 N) / m ² (weight of ceiling panel 6) × 1.5 G (earthquake acceleration) or more. Can.

  Furthermore, in the suspended ceiling structure B of the present embodiment, conventionally, the ceiling panel 6 is screwed to the ceiling base 4 at a pitch of 150 to 225 mm, while the screws 8 around the reinforcement brace 7 are used as shown in FIG. Beat and double. That is, the number of installed screws 8 in the reinforcement effective range by the reinforcement brace 7 is made larger than that of other parts.

  Thereby, in suspended ceiling structure B of this embodiment, horizontal force and vertical force repeatedly act around connection part of reinforcement brace 7 at the time of earthquake, for example, when reinforcement brace 7 is buckled beyond an elastic range. Even in this case, it is possible to prevent the ceiling panel 6 from falling off due to screw head missing or the like.

  Therefore, in the suspended ceiling structure B of the present embodiment, it is possible to reduce the amount of the ceiling base while securing the seismic performance, to reduce the cost, and to more reliably suppress the falling of the ceiling panel 6 Become.

  As mentioned above, although one Embodiment of the suspended ceiling structure which concerns on this invention was described, this invention is not limited to said one embodiment, It can change suitably in the range which does not deviate from the meaning.

  For example, in this embodiment, the ratio of the distance M between adjacent T bars (first support members) 1 to the distance N between adjacent connection bars (second support members) 3 is set to M: N = 2: 1 It is assumed that a ceiling structure B is formed. On the other hand, the ratio of the distance between the first support member (T-bar) 1 and the second support member (connection bar) 3 according to the present invention may be M: N = 1.5 to 3: 1. If it is set, it is possible to obtain the same effect as this embodiment.

1 T bar (first support member)
2 Suspension bolt (hanging member)
3 Connecting bar (cross bar, second support member)
4 ceiling base 5 ceiling 6 ceiling panel (ceiling material)
7 Reinforcement brace 8 Screw A Conventional suspended ceiling structure B Suspended ceiling structure M Distance between adjacent T bars N Distance between adjacent connection bars T1 One direction T2 Other direction T3 Vertical direction

Claims (4)

A plurality of first support members are arranged in parallel at predetermined intervals in one horizontal direction and extend in the other direction orthogonal to the one direction, and are arranged in parallel at the predetermined intervals in the other direction, the one direction A ceiling base formed in a lattice shape by assembling a plurality of second support members extending in the
A suspension member which connects the upper end to the upper structure of the building and connects the lower end to the ceiling base to suspend and support the ceiling base;
A plate-like ceiling material fixed to the lower surface of the ceiling base with a screw to form a ceiling surface;
And a reinforcing brace disposed so as to connect the upper end to the upper structure and the lower end to the ceiling base directly or indirectly.
The ceiling material is attached to the ceiling base by driving the screw from below and penetrating the ceiling material,
And the first support member and the second support member are each formed in a cross-sectional reverse T-shape,
Assuming that the distance between the adjacent first support members is M and the distance between the adjacent second support members is N, the ceiling base is formed such that M: N = 2: 1. (1) A suspended ceiling structure characterized in that the distance M between the support members is set to 910 mm, and the distance N between the second support members is set to 455 mm. In the suspended ceiling structure according to claim 1,
The first support member is configured to have a greater thickness than the second support member,
A suspended ceiling structure characterized in that a plate thickness of the first support member is 0.5 mm and a plate thickness of the second support member is 0.4 mm. In the suspended ceiling structure according to claim 1 or 2,
A suspended ceiling structure characterized in that the number of installed screws of the reinforcement effective range by connecting the lower ends of the reinforcement braces is larger than that of other parts. In the suspended ceiling structure according to claim 3,
A suspended ceiling structure characterized in that the number of installation of screws in the reinforcement effective range by connecting the lower ends of the reinforcement braces is doubled compared with other parts.

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