JP6696744B2 - Suspended ceiling reinforcement structure - Google Patents

Description

  The present invention relates to a suspended ceiling reinforcing structure.

  Conventionally, suspended ceilings are often used as ceilings of buildings such as schools, hospitals, production facilities, gymnasiums, pools, airport terminal buildings, office buildings, theaters, and cinema complexes (see, for example, Patent Documents 1 and 2). .. Then, on the suspended ceiling A, as shown in FIG. 4, for example, a plurality of field edges 1 arranged in parallel in a horizontal direction T1 at a predetermined interval and a plurality of field edges 1 orthogonal to the field edge 1 and in the other horizontal direction. A plurality of field rim receivers 2 arranged side by side at a predetermined interval in T2 and integrally connected to a plurality of field rims 1 and a lower end connected to the field rim receiver 2 and an upper end being a floor material of an upper floor. A plurality of suspension bolts 4 fixed to the upper structure (building body) 3 and the like, and a grid-like ceiling base 7 composed of the field rim 1 and the field rim receiver 2 and fastened together with screws. There is one configured by including a ceiling panel (ceiling material) 6 such as a gypsum board forming a ceiling surface (ceiling portion 5).

  Further, as shown in FIG. 5, for example, in a suspended ceiling A where a heavy equipment such as a fan filter unit needs to be installed on the ceiling 5 like a clean room, a predetermined interval is provided in one horizontal direction T1. A plurality of T-bars 8 arranged side by side and extending in the other direction T2 orthogonal to the one direction T1, and a plurality of suspensions arranged by connecting the upper end to the upper structure 3 and connecting the lower end side to the T-bar 8. There is also a configuration including a bolt 4 and a ceiling panel 6 which is screwed to a ceiling base 7 made of a T-bar 8 or the like and integrally attached to form a ceiling surface (ceiling portion 5).

  Here, the suspended ceiling A formed by suspending and supporting the field rim 1 and the field rim support 2, and the ceiling base 7 such as the T bar 8 and the ceiling panel 6 with the suspension bolts 4 is structurally effective in the event of an earthquake. Easy to roll due to the horizontal force acting. Then, there is a risk that the end portion 5a of the ceiling portion 5 collides with a building component (building body) 9 such as a wall, a pillar, or a beam when the earthquake occurs and the ceiling panel 6 is damaged or falls off. there were.

  Therefore, conventionally, the upper end is connected to the suspension base side of the upper structure 3 or the suspension bolt 4 and the lower end is used as the suspension bolt 4, the field edge 1, the field edge support 2, the ceiling base 7 such as the T bar 8. Reinforcing brace (brace material) 10 is obliquely installed by connecting to suppress rolling of the ceiling portion 5 including the ceiling base 7 and the ceiling panel 6 during an earthquake (see FIG. 5).

  Further, the reinforcing brace 10 has its upper and lower ends connected to the hanging bolt 4, the upper structure of the building, and the ceiling base 7, and the hanging bolt 4, the ceiling base 7 and the reinforcing brace 10 bear a horizontal force. .. As shown in FIGS. 6 and 7, for example, the reinforcing brace 10 has upper and lower end portions connected to the hanging bolt 4, the upper structure of the building, and the ceiling substrate 7 by using the mounting brackets 11 and 12. There is.

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

  On the other hand, in the above-mentioned conventional reinforcing brace 10, as shown in FIGS. 6 and 7, a fixing portion 13 whose upper end portion and lower end portion are connected to the hanging bolt 4, the upper structure of the building, and the ceiling base 7 by using the mounting brackets 11 and 12, respectively. Shows a rigid-pin like behavior during the initial behavior due to an earthquake. That is, in the conventional suspended ceiling A, when an external force acts on the suspended ceiling A due to an earthquake or the like, a bending moment is generated in the fixed portion 13 as the applied force progresses, and the bending moment also causes buckling. An axial force is generated, which causes the external force acting on the suspended ceiling A to be transmitted and borne by the reinforcing brace 10 due to an earthquake or the like.

  Then, in the conventional suspended ceiling A configured as described above, when a very large external force is applied, the proof strength starts to be lost from a weak portion of the surrounding joint members, screws, the reinforcing brace 10, etc. However, due to the rigid-pin-like behavior of the fixing portions 13 at the upper end and the lower end of the reinforcing brace 10, if the specifications of the mounting brackets 11 and 12, the hanging length, the ceiling weight, etc. are different, the end result will be reached. The situation changes.

  That is, in order to ensure the function maintenance performance within the elastic deformation / displacement range due to an earthquake and to control the ultimate situation when the deformation / displacement exceeds the assumption, the upper end of the reinforcement brace 10 is to be controlled. Although it is required that the fixed portions 13 at the bottom and the lower end show stable behavior (elimination of variations) and always damage assumed members, this cannot be realized by the conventional suspended ceiling A.

  In view of the above circumstances, the present invention makes it possible to control the ultimate situation when deformation / displacement more than expected occurs while ensuring the function maintaining performance within the elastic deformation / displacement range associated with an earthquake or the like. An object is to provide a suspended ceiling reinforcement structure.

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

The suspended ceiling reinforcement structure of the present invention comprises a main steel material arranged in parallel in a horizontal direction at a predetermined interval, and is suspended and supported by an upper structure of a building frame, and the main of the ceiling base material. A suspended ceiling reinforcement structure for reinforcing a suspended ceiling structure comprising: a ceiling material attached to a steel member to form a ceiling surface, comprising a reinforcement brace, wherein the reinforcement brace has an upper end side in an axial direction. under the pivotally connected around the axis in the upper shaft portion supported in the upper structure while oriented horizontally, the lower end, which is supported in the axial direction in the horizontal direction toward One One prior Symbol ceiling material provided coupled rotatably around the axis in the side shaft portion comprises a pre-Symbol brace lower fixture disposed by fixing the ceiling material, the brace lower fixture, the lower shaft portion And a brace connecting portion that is erected upright with the plate surface in the horizontal direction and that supports the lower shaft portion so as to be rotatable about the axis, and in a lateral direction that is orthogonal to the brace connecting portion from the lower end of the brace connecting portion. and a ceiling material fixing portion which is fixed to the front Symbol ceiling material by implanting screws from the lower surface side of the front Symbol ceiling material together when placed in surface contact is allowed on the upper surface of the front Symbol ceiling material a lower surface which extends And a ceiling base fitting recessed portion that is formed with a length larger than the distance between the adjacent main steel materials in the one direction and is recessed upward from the lower surface so that the main steel material of the ceiling base can be fitted. It is characterized by being formed.

Further, in the suspended ceiling reinforcing structure of the present invention, a brace upper mounting tool for connecting an upper end portion of the reinforcing brace to the upper structure is provided, and the brace upper mounting tool uses the brace upper mounting tool for the upper structure. A fixing plate for fixing to the fixing member, and a cylindrical rod-shaped upper shaft portion provided integrally with the fixing member, wherein the fixing member is arranged so as to be bonded to the surface of the upper structure. And a pair of support plates that are connected to an upper end of the fixed plate and project downwardly and are arranged at a predetermined interval. The upper shaft portion has both ends of the pair of support plates. May be supported and disposed.
Furthermore, in the suspended ceiling reinforcing structure of the present invention, the fixing plate is provided with a mounting hole for inserting a bolt to fix the fixing member to the surface of the upper structure, and the mounting hole is The fixing plate may be arranged substantially in the center in the width direction, and may be arranged closer to one end side than the center in the depth direction of the fixing plate.

  According to the suspended ceiling reinforcing structure of the present invention, since the upper end portion side and the lower end portion side of the reinforcing brace are rotatably connected to the shaft portion, respectively, the fixing portion on the upper end portion side and the fixing portion on the lower end portion side are provided. Can be surely brought into a pin-coupled state.

  As a result, the fixed portions at the upper end portion and the lower end portion of the reinforcing brace exhibit stable behavior (variation is eliminated), and it is possible to always damage assumed members. Therefore, it is possible to control the ultimate situation when the deformation / displacement exceeds the assumption while securing the function maintaining performance within the elastic deformation / displacement range due to an earthquake or the like.

It is a figure which shows the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a figure which shows the fixed part by the side of the upper end part of the reinforcement brace of the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a figure which shows the fixed part by the side of the lower end part of the reinforcement brace of the suspended ceiling reinforcement structure which concerns on one Embodiment of this invention. It is a perspective view showing a suspended ceiling structure. It is a perspective view showing a suspended ceiling structure. It is a perspective view which shows an example of the upper attachment metal fitting (fixed part by the side of an upper end part) of the conventional reinforcement brace. It is a perspective view which shows an example of the lower attachment metal fitting (fixed part by the side of a lower end part) of the conventional reinforcement brace.

  Hereinafter, a suspended ceiling reinforcing structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 and 5.

  Here, in this embodiment, for example, a suspension ceiling for use as a ceiling of a building such as a school, a hospital, a production facility, a gymnasium, a pool, an airport terminal building, an office building, a theater, and a cinema complex is subjected to seismic reinforcement and seismic retrofitting. The present invention relates to a ceiling reinforcing structure.

  First, as shown in FIG. 5, the suspended ceiling (suspended ceiling structure) B according to the present embodiment is provided with a plurality of extending in the other direction T2 orthogonal to the one direction T1 with a predetermined interval in the horizontal direction T1. No. T bar (main steel material having an inverted T-shaped cross section) 8, a plurality of suspension bolts 4 fixed to the upper structure 3 at the upper end and connected to the T bar 8 at the lower end, and screws on the ceiling base 7. A ceiling panel (ceiling material) 6 which is fastened and integrally attached to form a ceiling surface (ceiling portion 5).

Further, the suspended ceiling B has a plurality of connecting T-bars (a connecting steel member having an inverted T-shaped cross-section) which is provided in the other direction T2 and extends in one direction T1 and is bridged and connected to the adjacent T-bars 8. (Not shown), the ceiling base 7 is composed of the T-bar 8 and the connected T-bars, that is, the steel materials assembled in a grid pattern.

  Further, the hanging bolt 4 is provided by connecting the lower end side to the T bar 8 of the ceiling base 7 through a hanging member connecting fitting, and suspends and supports the ceiling base 7.

  Further, on the lower surface of the ceiling base 7, a lightweight ceiling panel 6 such as a direct-adhered rock wool sound absorbing plate is fixedly installed with a screw penetrating the ceiling panel 6 and the ceiling base 7 from the lower side. In this way, the ceiling surface is formed by attaching the plurality of ceiling panels 6 to the ceiling base 7.

  On the other hand, in the suspended ceiling B of the present embodiment, as shown in FIG. 1, a suspended ceiling reinforcement structure for suppressing the ceiling inertial force (horizontal force) when an earthquake occurs and suppressing the rolling of the ceiling portion 5. C is provided.

  The suspended ceiling reinforcement structure C of the present embodiment includes a reinforcement brace 10, an upper brace attachment 15 for connecting the upper end of the reinforcement brace 10 to the upper structure 3 of the building frame, and a lower end of the reinforcement brace 10 as a ceiling panel. 6 and a lower brace fixture 16 for connecting to 6. That is, in the suspended ceiling reinforcement structure C of the present embodiment, the lower end portion of the reinforcement brace 10 is connected to the ceiling panel 6 instead of the suspension bolt 4 and the ceiling base 7 as in the conventional case. The lower end of the reinforcing brace 10 may be connected to the ceiling base 7.

  Further, in the suspended ceiling reinforcing structure C of the present embodiment, the reinforcing brace 10 is a shaped steel material, and the pair of reinforcing braces 10 is one set, and the pair of reinforcing brace 10 of this set is connected in one direction T1 and / or another direction. They are arranged side by side in the direction T2 so as to have a V-shape or a V-shape when viewed from the front, and the upper end and the lower end of each reinforcing brace 10 are respectively connected to the upper brace fixture 15 and the lower brace fixture 16 to form the upper structure of the building. 3 and the ceiling panel 6 are connected.

  Next, as shown in FIG. 2, the brace upper mount 15 of the present embodiment has a columnar rod-shaped shaft portion 21 integrally provided on the fixing member 20 with the fixing member 20 and the axis O1 arranged in the horizontal direction. And a connecting rod 10a integrally provided on the upper end side of the reinforcing brace 10 is connected to the shaft portion 21 to support the reinforcing brace 10.

  The fixing member 20 is a member for fixing the brace upper fitting 15 to the upper structure 3 of the building structure, and has a fixing plate 20a arranged to be bonded to the surface of the upper structure 3 and an upper end of the fixing plate 20a. It is formed by including a pair of support plates 20b which are connected to each other so as to project downward and are arranged at a predetermined interval.

  Further, the fixing plate 20a is formed with a mounting hole 20c for inserting the bolt 23 fixed to the upper structure 3 by an anchor or the like to fix the fixing member 20 to the surface of the upper structure 3. Further, the mounting hole 20c is arranged substantially at the center in the width direction of the fixed plate 20a, and is arranged at one end side with respect to the center in the depth direction of the fixed plate 20a.

  The shaft portion 21 is arranged with both ends thereof supported by a pair of support plates 20b.

  Then, in the suspended ceiling B and the suspended ceiling reinforcement structure C of the present embodiment, the shaft portion 21 is inserted into the insertion hole 10b provided at the tip of the connecting rod 10a, and the upper end portion of the reinforcing brace 10 is a brace upper fixture. It is connected to 15.

  Accordingly, the fixing portion 24 for fixing the upper end side of the reinforcing brace 10 of the present embodiment to the upper structure 3 is rotatable about the axis O1 extending in the horizontal direction of the shaft portion 21 so that the upper end side is rotatable. Are connected to the superstructure 3.

  Next, as shown in FIG. 3, the lower brace fixture 16 of the present embodiment has a cylindrical rod-shaped shaft portion 25 arranged with the axis O2 direction oriented horizontally and a plate surface oriented laterally. A brace connecting portion 26 that is erected and supports the shaft portion 25 rotatably around the axis O2, and extends from the lower end of the brace connecting portion 26 in a lateral direction orthogonal to the brace connecting portion 26, and the lower surface thereof is the ceiling panel 6 And a ceiling material fixing portion 28 that is fixed to the ceiling panel 6 by driving a screw 27 from the lower surface (ceiling surface) side of the ceiling panel 6 and is installed in surface contact with the upper surface (back surface) of the ceiling panel 6. ..

  The reinforcing brace 10 has its lower end side connected to the shaft portion 25 of the brace lower attachment 16 via a connecting rod 10c.

  As a result, the fixing portion 29 for fixing the lower end side of the reinforcing brace 10 of the present embodiment to the ceiling panel 6 allows the lower end side to be rotatable around the axis O2 extending in the horizontal direction of the shaft portion 25. Is connected to the ceiling panel 6 (ceiling part 5).

  Here, the lower brace fixture 16 is formed to have a length L larger than the interval (span) between the adjacent T-bars 8 and is recessed upward from the lower surface on the lower end side of the lower brace fixture 16. In order to prevent interference with the ceiling base 7 by fitting the T bar 8 of the ceiling base 7 with the brace lower fixture 16 installed, a ceiling base fitting recess (not shown) is provided. Is preferred. In addition, a pair of ceiling base fitting recesses for fitting adjacent T-bars 8 may be provided.

  Further, the ceiling base fitting concave portion may be formed by including a field edge fitting concave portion that matches the size and position of the field edge 1 and a T bar fitting concave portion that matches the size and position of the T bar 8. Good. When the ceiling base fitting portion is formed in this manner, the same brace is used in both cases where the ceiling base 7 is formed with the field edge 1 and the T bar 8. The lower fixture 16 can be applied.

  In the suspended ceiling reinforcing structure C of the present embodiment having the above-described configuration, the upper end portion and the lower end portion side of the reinforcing brace 10 are rotatably connected to the shaft portions 21 and 25, respectively. The fixed portion 24 on the side and the fixed portion 29 on the lower end side can be surely brought into the pin coupling state.

  As a result, the fixing portions 24 and 29 at the upper end and the lower end of the reinforcing brace 10 exhibit stable behavior (variation is eliminated), and it is possible to always damage assumed members. Therefore, it is possible to control the ultimate situation when the deformation / displacement exceeds the assumption while securing the function maintaining performance within the elastic deformation / displacement range due to an earthquake or the like.

  Further, in the suspended ceiling reinforcement structure C of the present embodiment, the lower end portion is not the main steel material (T bar 8 or field edge 1) of the ceiling substrate 7 as in the conventional case, but the ceiling panel 6 is provided via the brace lower fixture 16. , And the reinforcing brace 10 can be installed. Thereby, the reinforcing brace 10 can be provided without being restricted by the position of the ceiling base 7, and the reinforcing brace 10 can be provided without being restricted by the strength of the ceiling base 7.

  Since the reinforcing brace 10 can be provided without being restricted by the position of the ceiling base 7, it is possible to greatly increase the degree of freedom of the seismic reinforcement and the seismic repair by the reinforcing brace 10.

  In addition, since the reinforcing brace 10 can be provided without being restricted by the strength of the ceiling base 7, it is possible to install a reinforcing brace having a larger size and higher yield strength than the conventional one. That is, for example, in the past, shaped steel having a size of C-40 × 20 × 10 × 1.6 is often used as a reinforcing brace, but in the suspended ceiling reinforcing structure C of the present embodiment, when the suspended length is less than 1000 mm. C-40 × 20 × 10 × 1.6 is used, C-65 × 30 × 10 × 1.6 when the suspension length is 1000 to less than 2000 mm, and C when the suspension length is 2000 to 3000 mm or less. It becomes possible to use a large-sized shaped steel such as −75 × 45 × 15 × 1.6 as the reinforcing brace 10. Therefore, also from this point, the degree of freedom of seismic retrofitting and retrofitting by the reinforcing brace 10 can be significantly increased.

  Further, since the brace lower fixture 16 is formed with a length L larger than the interval between the adjacent main steel materials, that is, with the length L larger than one span of the ceiling base 7, The horizontal force acting on the ceiling portion 5 including the ceiling base 7 and the ceiling panel 6 at the time of an earthquake can be effectively transmitted to the reinforcing brace 10. Thus, by providing this suspended ceiling reinforcing structure C, the suspended ceiling B can be made highly rigid within, for example, a natural period of 0.1 seconds or less, and extremely excellent earthquake resistance performance can be imparted. That is, it is possible to realize highly reliable seismic retrofitting and seismic retrofitting.

  Furthermore, by placing the brace lower fixture 16 at an arbitrary position on the ceiling panel 6, and fixing the brace lower fixture 16 to the ceiling panel 6 by fastening it with a screw 27 from below the ceiling surface side, the brace lower fixture 16 can be easily mounted on the ceiling panel 6. It can be installed integrally on the panel 6. As a result, the workability of installing the reinforcing brace 10 can be significantly improved as compared with the conventional case.

  Therefore, according to the suspended ceiling reinforcing structure C of the present embodiment, it becomes possible to eliminate the restriction on the installation position of the reinforcing brace 10 and effectively and efficiently perform the earthquake resistant reinforcement and the earthquake resistant repair of the suspended ceiling structure B. It becomes possible to give excellent seismic performance.

  Although one embodiment of the suspended ceiling reinforcing structure according to the present invention has been described above, the present invention is not limited to the above-mentioned one embodiment and can be appropriately modified without departing from the gist thereof.

  For example, in the present embodiment, the ceiling base 7 is configured to include a plurality of T-bars 8 (main steel material), but the ceiling base according to the present invention includes the field edge 1 (main steel material) and the field edge. The ceiling base 7 configured to include the receiver 2 may be used. By applying the present invention to a suspended ceiling in which the ceiling base 7 is provided with the field edge 1 and the field edge receiver 2, it is possible to obtain the same effect as that of the present embodiment.

  In addition, in the present embodiment, the suspended ceiling reinforcing structure according to the present invention is provided so that the existing suspended ceiling is subjected to seismic retrofitting and seismic retrofitting. It may be installed when a new ceiling is installed.

  Further, in the present embodiment, the description has been made assuming that the lower end portion of the reinforcing brace 10 is rotatably connected to the ceiling panel 6 via the brace lower attachment 16, but the lower end portion of the reinforcing brace 10 is attached to the ceiling base 7. May be rotatably connected. Even in this case, the same effect as the present embodiment can be obtained.

1 Field edge (main steel)
2 Field fence 3 Building superstructure 4 Hanging bolts (hanging members)
5 Ceiling part 6 Ceiling panel (ceiling material)
7 Ceiling base 8 T bar (main steel)
9 Building components (building frame)
10 Reinforcing Brace 10a Connecting Rod 10b Insertion Hole 10c Connecting Rod 11 Conventional Mounting Metal Fitting 12 Conventional Mounting Metal Fitting 13 Conventional Fixing Part 15 Brace Upper Mounting Tool 16 Brace Lower Mounting Tool 20 Fixing Member 20a Fixing Plate 20b Supporting Plate 20c Mounting Hole 21 Shaft 23 Bolt 24 Fixing part 25 Shaft part 26 Brace connection part 27 Screw 28 Ceiling material fixing part A Conventional suspended ceiling (suspended ceiling structure)
B suspended ceiling (suspended ceiling structure)
C Suspended ceiling reinforcement structure L Length of bottom brace fixture O1 Axis O2 Axis T1 One direction T2 Other direction T3 Vertical direction

Claims (3)

A main steel material is arranged in parallel in a horizontal direction at a predetermined interval and is suspended and supported by the upper structure of the building frame, and a ceiling surface is formed by being attached to the main steel material of the ceiling base material. A suspended ceiling reinforcing structure for reinforcing a suspended ceiling structure comprising:
Equipped with reinforced braces,
The reinforcing brace has an upper end side rotatably connected to an upper shaft portion supported by the upper structure around the axis while the axial direction is oriented horizontally, and a lower end side of the upper brace in the horizontal direction. lower shaft portion supported in towards One One prior Symbol ceiling material is provided with pivotally connected about an axis to,
Comprising a brace lower fixture disposed by fixing before Symbol ceiling material,
The brace lower attachment is a brace connecting part that is erected upright with the lower shaft part and the plate surface in the lateral direction, and supports the lower shaft part so as to be rotatable about an axis, and the brace connecting part. laterally extending to the lower surface of the pre-Symbol pre Symbol by implanting screws from the lower surface side of the front Symbol ceiling material together when placed by surface contact with the upper surface of the ceiling material ceiling material that is orthogonal to the brace connecting portion from the lower end And a ceiling material fixing portion fixedly attached to the ceiling base material, and having a length larger than an interval between the main steel materials adjacent to each other in the one direction, and being recessed upward from a lower surface, A suspended ceiling reinforcing structure, characterized in that it is formed with a ceiling base fitting concave portion into which a main steel material can be fitted. A brace top fitting for connecting the upper end of the reinforcing brace to the superstructure,
The brace upper attachment includes a fixing member for fixing the brace upper attachment to the upper structure, and a cylindrical rod-shaped upper shaft portion integrally provided on the fixing member,
The fixing member includes a fixing plate that is disposed so as to be joined to the surface of the upper structure, and a pair of supports that are provided so as to project downward with the upper end connected to the fixing plate and that are spaced apart from each other by a predetermined distance. And a plate,
The suspended ceiling reinforcing structure according to claim 1, wherein the upper shaft portion is disposed with both ends thereof supported by the pair of support plates, respectively. In the fixing plate, a mounting hole for inserting a bolt and fixing the fixing member to the surface of the upper structure is formed,
The suspended ceiling reinforcing structure according to claim 2, wherein the mounting hole is disposed substantially in the center of the fixed plate in the width direction, and is disposed closer to one end than the center of the fixed plate in the depth direction.

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