JP6226172B2 - Suspended ceiling structure - Google Patents

Description

  The present invention relates to a suspended ceiling structure.

  Conventionally, suspended ceilings are frequently used as ceilings of buildings such as schools, hospitals, production facilities, gymnasiums, pools, airport terminal buildings, office buildings, theaters, cinecones, etc. (see, for example, Patent Document 1 and Patent Document 2). . The suspended ceiling (suspended ceiling structure) A is, for example, as shown in FIG. 3, a plurality of field edges 1 arranged in parallel at a predetermined interval in one horizontal direction T1, and perpendicular to the field edges 1. A plurality of field receivers 2 that are arranged in parallel in the other horizontal direction T2 with a predetermined interval and are integrally connected to a plurality of field edges 1, a lower end connected to the field receiver 2, and an upper end A plurality of suspension bolts (suspending members) 4 fixedly attached to the upper structure 3 (building frame) such as floor materials of the floor and the lower surface of the field edge 1 are integrally attached by screws or the like. And a ceiling panel (ceiling material) 6 forming a ceiling surface (ceiling part 5).

  For example, as shown in FIG. 4, a suspended ceiling (suspended ceiling structure) A in which a heavy equipment such as a fan filter unit needs to be installed on the ceiling 5 as in a clean room has a horizontal direction T1. A plurality of T bars (supporting members having a reverse T-shaped cross section) 8 which are arranged in parallel with each other at a predetermined interval and extend in the other direction T2 orthogonal to one direction T1, and the upper end is fixed to the upper structure, and the lower end side is set to T A plurality of suspension bolts (suspension members) 4 connected to the bar 8 and a ceiling base 7 made of a T bar 8 or the like are screwed together to form a ceiling surface (ceiling portion 5). There is also a configuration including a ceiling panel (ceiling material) 6.

  On the other hand, the suspended ceiling A, in which the ceiling base 7 and the ceiling panel 6 of the T-bar 8 and the ceiling panel 6 are suspended and supported by the suspension bolts 4 as described above, is horizontal due to its structure. It is easy to roll by force. Then, when the earthquake sways, the end portion 5a of the ceiling portion 5 may collide with a building component (building frame) 9 such as a wall, a column, or a beam, and the ceiling panel 6 may be damaged or fallen off. there were.

  For this reason, a reinforcing brace 10 is conventionally provided by connecting the upper end side to the upper structure 3 and the like, and connecting the lower end side to the ceiling base 7 such as the suspension bolt 4, the field edge 1, the field edge receiver 2, and the T-bar 8. In addition, the rolling of the ceiling portion 5 composed of the ceiling base 7 and the ceiling panel 6 is suppressed during an earthquake (see FIG. 4).

  However, when performing seismic reinforcement or seismic retrofit by the reinforcing brace 10, it is necessary to perform an installation work by an operator entering the ceiling space H. For this reason, there is a case in which the range that can be reinforced is limited by wiring, piping, an air conditioner, or the like arranged in the ceiling space H, and cannot be adequately handled. In addition, low-strength general materials that are not JIS materials are used for the ceiling base 7, etc., and the performance after reinforcement is unstable and sufficient repair accuracy cannot be ensured, or because there are spot welds etc. There is also.

  On the other hand, the applicant of the present application, for example, as shown in FIG. 5, has a substantially bar shape with a substantially inverted U-shaped cross section such as a grooved steel, for example, below the ceiling portion 5 and laterally along the ceiling portion 5. Tensile material 11 is provided, both ends of the tensile material 11 are connected to the building housings 3 and 9, respectively, and an intermediate portion is provided from below the ceiling portion 5 to the ceiling material 6 and / or the ceiling base 7 such as tapping screws. The suspended ceiling structure B, which is connected and fixed by the connection fixing means, was invented, and a patent application (Japanese Patent Application No. 2013-016019) has already been filed for this invention.

  Further, in this suspended ceiling structure B, the outer peripheral end 5a side of the ceiling part 5 of the ceiling back space H between the ceiling part 5 and the upper structure 3 of the building, that is, the walls, columns, beams, etc. of the ceiling back space H On the building component (building frame) 9 side, the upper end is connected to the upper structure 3, and the bundle 15 is extended (hanged down) in the vertical direction T3. Furthermore, a plurality of the bundle members 15 are provided at predetermined intervals in a direction along the outer peripheral end portion 5a of the ceiling portion 5, and connecting members 16 extending in the lateral directions T1 and T2 are connected to the lower ends of the plurality of bundle members 15. Has been. As a result, the plurality of bundle members 15 are integrally connected via the connecting member 16. The tension member 11 connects one end portion and the other end portion to the connecting member 16 of the support body 18 composed of the bundle member 15 and the connecting member 16, and the bundle member 15 via the connecting member 16 and eventually the support member 18. Are connected to the building housings 3 and 9.

  In this way, a suspended ceiling structure B in which a tensile material (reinforcing grid member) 11 having a substantially inverted U-shaped cross section, such as channel steel, is disposed below the ceiling portion 5 and along the ceiling portion 5. In the (grid support method), the ceiling part 5 can be made to behave integrally with the building housings 3 and 9 by the tension member 11 during an earthquake, and the shaking of the ceiling part 5 can be suppressed.

  Further, the intermediate part of the tension member 11 is fixed to the ceiling member 6 and / or the ceiling base 7 from below the ceiling part 5 by using a connection fixing means such as a screw, so that when the tension member 11 is installed, the ceiling The work in the space H can be made almost unnecessary, and the workability can be greatly improved.

  Thus, even when the tensile material 11 is attached to the existing suspended ceiling structure A to improve the earthquake resistance, a dangerous work in the ceiling space H is unnecessary, and the inside of the ceiling space H is not required. The inconvenience that there is a range in which construction cannot be performed due to the clearance with the incidental equipment provided in the building and the building housing 3 can be solved, and the required construction period can be shortened and the cost can be reduced.

  In addition, maintenance of ceiling-related facilities such as air conditioners and lighting can be easily performed after the earthquake-resistant repair. Furthermore, whether the JIS material or the general material is used for the field edge 1, the field edge receiver 2, the T-bar 8, etc. of the ceiling base 7, and whether it is a newly installed or existing suspended ceiling structure, the ceiling material It is possible to cope with any material 6, and it is possible to reliably improve the seismic performance.

JP 2008-121371 A JP 2005-350950 A

  As described above, in the suspended ceiling structure B in which the tension members (stiffeners, reinforcing grid members) 11 are installed in a lattice pattern on the ceiling surface, the suspension members are provided on the outer peripheral end 5a side of the ceiling portion 5 of the ceiling space H. An end portion is connected to a support body 18 including a bundle member 15 and a connecting member 16, and an intermediate portion is connected to the ceiling portion 5 to dispose the tension member 11.

  On the other hand, the bundle member 15 of the support 18 and the connecting member 16 for connecting the end portion of the tension member 11 to a building component (building frame) 9 such as a wall, a column, or a beam are connected to the ceiling portion 5 of the ceiling space H. In the suspended ceiling structure B configured to be provided on the outer peripheral end portion 5a side, for example, if the ceiling space (height dimension of the ceiling back space H) is large, the ceiling back space is used when the bundle member 15 and the connecting member 16 are installed. Large-scale refurbishment within H will be required.

  In view of the circumstances described above, the present invention can reliably install a tensile material even in a case where a support for connecting ends of the tensile material cannot be disposed in the ceiling space. An object of the present invention is to provide a suspended ceiling structure that can improve performance.

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

  The suspended ceiling structure of the present invention is a suspended ceiling structure in which a ceiling material that forms a ceiling surface is attached to a ceiling base that is suspended and supported by an upper structure of a building frame via a suspension member. And a substantially rod-shaped tension member that extends in the lateral direction along the ceiling surface and is connected and fixed to the ceiling member and / or the ceiling base from below the ceiling member, and the ceiling member A reinforcing structure that extends in a lateral direction along the ceiling surface while being supported by a building housing located below, and that connects an end of the tensile material to bear a thrust force acting on the tensile material; It is characterized by comprising.

  Moreover, in the suspended ceiling structure of this invention, it is desirable that the said reinforcement structure is comprised by the lattice beam structure.

  Furthermore, the suspended ceiling structure of the present invention includes a support column that is erected by connecting a lower end to a building frame, the upper end of the support column is connected to the reinforcement structure, and the reinforcement structure is the support column. It is more desirable to be connected to the building frame via

  In the suspended ceiling structure of the present invention, a lower end is connected to the building frame, the support column is provided upright by penetrating the ceiling material and connected to the upper structure of the building frame. An intermediate part may be connected to the reinforcing structure, and the reinforcing structure may be connected to the building frame via the support column.

  In the suspended ceiling structure of the present invention, first, the tension member formed in a substantially rod shape is connected and fixed to the ceiling material and / or the ceiling base from below the ceiling material, so that the suspended ceiling structure can be surely and effectively at the time of an earthquake. Can suppress the rolling.

  Further, for example, a reinforcing structure such as a lattice beam structure, a steel plate, or an FRP plate is supported by a building frame located below the ceiling material, and extends laterally along the ceiling surface. By connecting the end portions, external force acts on the ceiling portion, the tensile material bears a horizontal force, and the thrust force generated in the tensile material can be transmitted to the reinforcing structure and received. This makes it possible to more reliably and effectively suppress rolling of the suspended ceiling structure during an earthquake.

  Therefore, according to the suspended ceiling structure of the present invention, the end portion of the ceiling portion made of the ceiling base and the ceiling material collides with a building frame such as a wall, a column, or a beam, and the ceiling material is damaged or dropped off. Can be prevented. That is, it is possible to realize a suspended ceiling structure with high reliability, and it is possible to perform seismic retrofit of the suspended ceiling structure with high reliability.

  Further, in the suspended ceiling structure of the present invention, the reinforcing structure that connects the ends of the tensile material is supported by being connected to a building frame such as a wall or a floor below the ceiling material. The installation work in the ceiling space such as installing the support in the ceiling space can be completely eliminated.

  In this way, unlike the conventional suspended ceiling structure, which has a top end connected to the upper structure of the building frame and is provided with a support made of a bundling material and a connecting material provided in the ceiling space, the ceiling area (the height of the ceiling space) Even when the size is large, it is possible to improve the seismic performance without requiring a large-scale renovation in the ceiling space.

  Further, by supporting the reinforcing structure using the support pillar, the installation work in the ceiling space can be completely eliminated, and the installation work of the reinforcing structure can be easily performed. In addition, by connecting the reinforcing structure to the building frame via the support column, it is possible to reliably transmit external forces acting on the suspended ceiling structure to the building frame and effectively suppress the rolling of the suspended ceiling structure. Become.

It is a perspective view which shows the suspended ceiling structure which concerns on one Embodiment of this invention. It is a X1-X1 arrow view of FIG. 1, and is a top view from the indoor side which shows the suspended ceiling structure which concerns on one Embodiment of this invention. It is a perspective view which shows the conventional suspended ceiling structure. It is a perspective view which shows the conventional suspended ceiling structure. It is a perspective view which shows the conventional suspended ceiling structure.

  Hereinafter, a suspended ceiling structure according to an embodiment of the present invention will be described with reference to FIG. Here, this embodiment is a suspended ceiling structure used as a ceiling of buildings such as schools, hospitals, production facilities, gymnasiums, pools, airport terminal buildings, office buildings, theaters, cinecones, etc., and existing suspended ceiling structures. It is about earthquake-resistant repair method.

  As shown in FIG. 1, the suspended ceiling (suspended ceiling structure) C of the present embodiment includes a field edge 1, a field edge receiver 2, a suspension member (suspension bolt) 4, and a ceiling material 6.

  The field edge 1 is, for example, a grooved steel having a U-shaped cross section, and extends horizontally, and is arranged in parallel at a predetermined interval in a horizontal direction T1 in one horizontal direction. .

  The field edge receiver 2 is, for example, a grooved steel having a U-shaped cross section, is horizontally extended, and is arranged in parallel with a predetermined interval in the horizontal direction T2 in the other horizontal direction. Yes. At this time, the field edge receiver 2 is disposed so as to intersect the field edge 1 and is disposed in a state of being placed on the plurality of field edges 1. Each field edge receiver 2 is connected to the field edge 1 by using a field edge connection bracket (clip) at a portion intersecting with the field edge 1.

  The suspension member 4 is a suspension bolt that is formed in a cylindrical bar shape and has an external thread threaded on its outer peripheral surface, and its upper end is fixed to an upper structure 3 (building frame) such as an upper floor or is made of steel. A plurality of lower ends are connected to the field edge receiver 2 by using hanging member connecting brackets (hangers). Further, the plurality of suspension members 4 are dispersedly arranged at a predetermined interval.

The ceiling material (ceiling panel) 6 is formed by laminating two boards and integrally stacking them. For example, the ceiling material (ceiling panel) 6 is formed with a weight of about 20 kg per 1 m ² together with the weight of a ceiling accessory. The ceiling material 6 is installed on the lower surfaces of the plurality of field edges 1 by screws or the like. The ceiling material 6 may be composed of one board and three or more boards.

  In the suspended ceiling C, the field edge 1, the field edge receiver 2, and the ceiling material 6 are suspended and supported by the upper structure 3 of the building via the suspension member 4. A ceiling base 7 is formed by the field edge 1 and the field edge receiver 2, and the ceiling part 5 is formed by the ceiling base 7 and the ceiling material 6 attached to the ceiling base 7, and the ceiling surface of the lower floor is formed by the ceiling part 5. ing.

  Moreover, in the suspended ceiling C of this embodiment, as shown in FIG.1 and FIG.2, the substantially rod-shaped tension | tensile_strength material is provided below the ceiling part 5 and along the lower surface (ceiling surface) of the ceiling part 5 horizontally. (Reinforcing grid member) 11 is disposed. Further, the tension member 11 is a grooved steel formed of, for example, an aluminum extruded shape steel or a steel member, and includes a pair of side wall portions and a continuous portion that connects the upper ends of the pair of side wall portions. It is formed in a letter shape (substantially inverted U-shaped cross section).

  Further, the tension member 11 is fixed to the ceiling member 6 (ceiling part 5) and the ceiling base 7 (field edge 1) from below the ceiling part 5 by a connection fixing means such as a tapping screw from the lower part of the ceiling part 5. Is provided. And in this embodiment, such a tension material 11 is arrange | positioned under the ceiling part 5 at the grid | lattice form (grid shape) of 900-2400 mm pitch, for example.

  Furthermore, the suspended ceiling C according to the present embodiment includes a reinforcing structure 12 for connecting the end portions of the tension members 11 arranged as described above and bearing a thrust force acting on the tension members 11. Has been.

  The reinforcing structure 12 of the present embodiment extends in one direction T1 in the horizontal direction and the other direction T2 along the ceiling surface while being supported by a building frame such as a wall, beam, or column located below the ceiling material 6. In addition, they are arranged in a lattice pattern so as to overlap the ceiling portion 5 and the vertical direction T3. Moreover, the space | interval of the reinforcement structure 12 adjacent to each in the one direction T1 and the other direction T2 is made larger than the space | interval of the adjacent tensile material 11, and the some reinforcement structure 12 is arrange | positioned.

  Furthermore, in this embodiment, the reinforcing structure 12 is formed with a lattice beam structure, and is formed with rigidity and proof strength capable of bearing a thrust force transmitted from the tensile material 11 with certainty. The reinforcing structure 12 does not have to be limited to a lattice beam structure as long as it is formed with rigidity and proof stress capable of bearing the thrust force transmitted from the tensile material 11, for example, a steel plate or an FRP plate. It may be a plate-like and belt-like member.

  In addition, the reinforcing structure 12 is supported by connecting, for example, an end portion to a building frame such as a wall or a column positioned below the ceiling material 6, and extends in the lateral directions T1 and T2 along the ceiling surface. Yes.

  And in the suspended ceiling C of this embodiment, the tension | tensile_strength material 11 arrange | positioned under the ceiling part 5 connects an end part to the building frame via the reinforcement structure 12 provided under the ceiling part 5. However, since the middle part is arranged connected to the ceiling material 6 and the field edge 1, the ceiling part 5 behaves integrally with the building frame 3, 9 by the tension material 11 in the event of an earthquake. Shake is suppressed.

  At this time, the thrust force acting on the tensile material 11 is received by the reinforcing structure 12, and the reinforcing structure 12 resists this thrust force, so that the ceiling part 5 is more reliably integrated with the building frame by the tensile material 11. And the shaking of the ceiling part 5 is suppressed.

  Here, for example, as shown in FIG. 1 and FIG. 2, when the length (span length) of the reinforcing structure 12 in the extending direction is large, the lower end is connected to the building frame such as a floor and the support column 13 is erected. In addition, the upper end of the support pillar 13 may be connected to the reinforcement structure 12 via a bracket 14 or the like, and the reinforcement structure 12 may be connected to and supported by the building pillar by the support pillar 13. At this time, the support pillar 13 includes a plurality of reinforcing structures at the connection portion connecting the end portions of the reinforcing structure 12 arranged along the outer peripheral end portion 5 a of the ceiling portion 5 and the inner portion of the ceiling portion 5. It is preferable that the upper end is connected to a connecting portion where the end portions are connected so that 12 crosses (orthogonally) in a cross shape or a T shape.

  In this case, the supporting column 13 can be installed to support the reinforcing structure 12 without performing work in the ceiling space H. And if the support pillar 12 is connected to the reinforcement structure 12 and supported in this manner, an external force acting on the suspended ceiling structure C is transmitted to the building frame through the support pillar 13 during an earthquake. At the same time, the support column 13 bears the thrust force of the tension member 11. Further, the support pillar 13 suppresses (prevents) the deflection of the reinforcing structure 12 and the deflection of the ceiling portion 5.

  Further, the lower end is connected to a building frame such as a floor, the upper end is connected to the upper structure 3 of the building frame through the ceiling material 6, and the support column 13 is erected, and the intermediate part of the support column 13 is reinforced structure The reinforcing structure 12 may be connected to the body 12 via the bracket 14 or the like, and connected to and supported by the support pillar 13 to the building frame.

  In this case, since both ends of the lower end and the upper end of the support column 13 are connected to the building frame, a larger external force can be borne by the support column 13. For this reason, the support column 13 bears the thrust force of the tensile material 11 more effectively, and the deflection of the reinforcing structure 12 and the deflection of the ceiling portion 5 are suppressed by the support column 13.

  Therefore, in the suspended ceiling structure (suspended ceiling) C of the present embodiment, first, the tensile material 11 formed in a substantially rod shape is connected and fixed to the ceiling material 6 and / or the ceiling base 7 from below the ceiling material 6. The roll of the suspended ceiling structure C can be suppressed reliably and effectively during an earthquake.

  Further, for example, a reinforcing structure 12 such as a lattice beam structure, a steel plate, or an FRP plate is supported by a building frame located below the ceiling material 6 and extends in the lateral directions T1 and T2 along the ceiling surface. By connecting the end of the tension member 11 to the structure 12, an external force acts on the ceiling 5, and the tension member 11 bears a horizontal force and transmits the thrust force generated in the tension member 11 to the reinforcing structure 12. Can be received. This makes it possible to more reliably and effectively suppress the rolling of the suspended ceiling structure C during an earthquake.

  Therefore, according to the suspended ceiling structure C of the present embodiment, the end of the ceiling portion 5 composed of the ceiling base 7 and the ceiling material 6 collides with a building housing 9 such as a wall, a column, or a beam, and the ceiling material 6 is damaged. It is possible to prevent occurrence or dropout. That is, it becomes possible to realize a suspended ceiling structure C with high reliability, and it is possible to perform seismic retrofit of the suspended ceiling structure C with high reliability.

  Further, in the suspended ceiling structure C of the present embodiment, the reinforcing structure 12 that connects the ends of the tensile material 11 is connected to and supported by a building frame such as a wall or a floor below the ceiling material 6. Thus, it is possible to completely eliminate the installation work in the ceiling back space H in which the support (bundle material 15 and connecting material 16) is installed in the ceiling back space H as in the prior art.

  In this way, unlike the conventional suspended ceiling structure B, which is connected to the upper structure 3 of the building frame and includes the support body 18 including the bundle member 15 and the connecting member 16 provided in the ceiling space H, the ceiling space is provided. Even if (the height dimension of the ceiling space H) is large, it is possible to improve the seismic performance without requiring a large-scale repair in the ceiling space H.

  Furthermore, by supporting the reinforcing structure 12 using the support pillars 13, it is possible to completely eliminate the installation work in the ceiling space H, and the installation work of the reinforcing structure 12 can be easily performed. It becomes possible. Further, by supporting the reinforcing structure 12 using the support pillar 13, an external force acting on the suspended ceiling structure C is reliably transmitted to the building frame through the support pillar 13, and the thrust force of the tension member 11 is supported by the support pillar 13. Can bear. Furthermore, the support column 13 can suppress (prevent) the deflection of the reinforcing structure 12 and the deflection of the ceiling portion 5. Thereby, it becomes possible to suppress the rolling of the suspended ceiling structure C more effectively.

  Further, the lower end is connected to a building frame such as a floor, the upper end is connected to the upper structure 3 of the building frame through the ceiling material 6, and a support column 13 is erected, and a reinforcing structure is provided in the middle portion of the support column 13. When the body 12 is connected, a larger external force can be borne by the support pillar 13. For this reason, the thrust force of the tension | tensile_strength material 11 can be borne more effectively by the support pillar 13, and the bending of the reinforcement structure 12 and the bending of the ceiling part 5 can be suppressed (prevented). Thereby, it becomes possible to suppress the rolling of the suspended ceiling structure C more effectively.

  As mentioned above, although one embodiment of the suspended ceiling structure according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  In the present embodiment, the ceiling foundation 7 is configured to include the field edge 1 and the field edge receiver 2, but the ceiling foundation according to the present invention is not necessarily limited to the present embodiment. For example, a plurality of T bars (cross-sections) supported in a suspended manner by a suspension bolt (suspending member) 4 and arranged in parallel in one horizontal direction T1 with a predetermined interval and extending in another direction T2 orthogonal to the one direction T1. The ceiling foundation 7 may be configured to include an inverted T-type support member. That is, the present invention does not need to limit the configuration of the ceiling foundation.

  In addition, for example, when the work in the ceiling space H can be performed relatively easily, a conventional suspension bolt 4 having an upper end connected to the upper structure 3 of the building frame is appropriately used according to the conditions and necessity of the suspended ceiling structure. The ceiling material 6 may be penetrated and the lower end thereof may be connected to the reinforcing structure 12, and the reinforcing structure 12 may be connected to and supported by the building frame on the ceiling back space H side. When configured in this manner, it is possible to effectively prevent the deflection of the reinforcing structure 12 particularly when the span is large.

1 Field edge 2 Field edge receiver 3 Superstructure (building frame)
4 Hanging members (hanging bolts)
5 Ceiling part 5a End part 6 Ceiling material (ceiling panel)
7 Ceiling base 8 T-bar 9 Building component (building frame)
DESCRIPTION OF SYMBOLS 10 Reinforcement brace 11 Tensile material 12 Reinforcement structure 13 Support pillar 14 Bracket 15 Bundle material 16 Connection material 18 Support A Conventional suspended ceiling structure B Conventional suspended ceiling structure C Suspended ceiling structure H Ceiling space T1 Horizontal direction (one direction) )
T2 lateral direction (other direction)
T3 vertical direction

Claims (4)

In the suspended ceiling structure in which the ceiling material that forms the ceiling surface is attached to the ceiling base that is suspended and supported by the upper structure of the building frame via the hanging member,
A substantially bar-shaped tension member that extends laterally below the ceiling material and along the ceiling surface, and is connected and fixed to the ceiling material and / or the ceiling base from below the ceiling material. Material,
Reinforcement that extends in the lateral direction along the ceiling surface while being supported by a building frame located below the ceiling material and bears a thrust force acting on the tensile material by connecting ends of the tensile material A suspended ceiling structure characterized by comprising a structure. The suspended ceiling structure according to claim 1,
A suspended ceiling structure, wherein the reinforcing structure is constituted by a lattice beam structure. The suspended ceiling structure according to claim 1 or 2,
Provided with support pillars erected by connecting the lower end to the building frame,
A suspended ceiling structure, wherein an upper end of the support column is connected to the reinforcing structure, and the reinforcing structure is connected to the building frame via the support column. The suspended ceiling structure according to claim 1 or 2,
A lower end is connected to the building frame, and a support column is provided upright through the ceiling material and connected to the upper structure of the building frame.
A suspended ceiling structure, wherein an intermediate portion of the support column is connected to the reinforcing structure, and the reinforcing structure is connected to the building frame via the support column.

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