JP2009167737A - Earthquake-proof ceiling structure and installation method of earthquake-proof ceiling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake-proof ceiling structure which can prevent a collision with a surrounding wall surface by controlling displacement of a ceiling at the time of an earthquake easily and securely. <P>SOLUTION: The earthquake-proof ceiling structure has a cradling receptacle 12, a cradling 14, and a ceiling material 16 attached to the cradling 14. The cradling receptacle 12 is suspended and retained from a ceiling slab 28 through the medium of a hanging bolt, and the cradling 14 is attached to the cradling receptacle 12. A fixation plate 20 is attached to the lower end of a strut 18 hung from the ceiling slab 28 through the medium of a height-level adjustment means 52. Then a ceiling seismic response control device 24 is interposed between the fixation plate 20 and the ceiling material 16, and it is used for absorbing displacement of the ceiling material 16 at the time of an earthquake. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seismic ceiling structure and a seismic ceiling mounting method for preventing a ceiling material from falling during an earthquake.

  Damage caused by earthquakes has occurred mainly in buildings designed based on standards prior to the current new seismic design standards for structural structures, but non-structural members such as ceilings are damaged regardless of the design period. .

  Non-structural members such as ceilings have been rarely studied for seismic resistance from the viewpoints of structure and materials.

  By the way, in recent years, the space behind the ceiling is often used as an installation space for various equipment such as an air conditioner. Therefore, a suspended ceiling structure that easily secures the space is often used.

  In such a suspended ceiling structure, it is usually arranged that a field receiver is suspended from a lower surface of a ceiling slab with a suspension bolt, a field edge is attached to the lower surface of the field edge receiver, and a ceiling material is attached to the lower surface of the field edge. (See Patent Document 1).

  In such a suspended ceiling, when the ceiling pocket is about 1.5 m or more, in order to prevent the ceiling member from shaking greatly during an earthquake, the lower end portion or the field of the suspension bolt adjacent to the upper end portion of the suspension bolt is used. A brace is disposed obliquely between the edge receiver.

In addition, by providing a clearance of about 10 cm inside and outside at the part where the ceiling end and the wall face, it is possible to prevent the ceiling from shaking greatly and colliding with the wall, damaging or dropping during an earthquake. ing.
JP 2004-308356 A

  When using the brace described above, since the brace is installed between the upper end portion of the suspension bolt and the lower end of the adjacent suspension bolt or between the field receivers, a member below the member whose movement is stopped by the brace, For example, the field edge or the field edge slides greatly.

  When the sliding width becomes larger than the clearance between the wall surface and the ceiling end, the ceiling and the wall surface collide, and when this is repeated, the collision part of the ceiling is damaged and finally falls.

  Also, if the ceiling surface shakes greatly while twisting in a plane, the clip that joins the field edge and the field edge will come off and the ceiling will fall, or the field edge will buckle and the ceiling material will join the field edge. Will fall out and the ceiling material will fall.

  An object of the present invention is to provide an earthquake-resistant ceiling structure and a method for attaching an earthquake-resistant ceiling that can easily and surely suppress the displacement of the ceiling during an earthquake and prevent a collision with a surrounding wall surface.

  In order to achieve the above object, the earthquake-resistant ceiling structure of the present invention includes a field edge receiver suspended from an upper structure via a suspension member, a field edge attached to the field edge receiver, and attached to the field edge. A fixing plate is attached to a lower end of a column suspended from the upper structure through a height level adjusting means, and the earthquake is caused between the fixing plate and the ceiling material. It is characterized by interposing a ceiling vibration control device that absorbs the displacement of the ceiling material.

  According to the present invention, by absorbing the displacement of the ceiling material at the time of the earthquake by the ceiling vibration control device interposed between the fixed plate and the ceiling material attached to the lower end of the column suspended from the upper structure, It is possible to prevent the ceiling material from falling by simply and reliably suppressing the displacement of the ceiling to prevent the collision with the surrounding wall surface.

  In addition, because the ceiling vibration control device is fixed to the fixed plate that has been lowered from the upper structure with the support column, the component material is lightweight and simple, so installation is easy, and the degree of freedom in the installation position of the ceiling vibration control device is high. In addition, it is not necessary to reinforce the chassis and can be applied to large-scale ceilings, stepped ceilings, and the like.

  In the present invention, the ceiling vibration control device includes a fixed plate side mounting member mounted on the fixed plate, a ceiling side mounting member mounted on the ceiling material side, the fixed plate side mounting member, and the ceiling side mounting member. And a viscoelastic material provided between the two.

  By adopting such a configuration, it is possible to provide a ceiling structure vibration control device having a simple structure in which a viscoelastic material is provided between the fixed plate side mounting member and the ceiling side mounting member. The shaking of the ceiling at the time can be reduced.

  In the present invention, the fixing plate may be supported by a plurality of diagonal members that are slanted over the upper structure.

  The fixing plate (ceiling vibration control device) can be reliably fixed by the plurality of diagonal members.

  In this case, the length of each diagonal member can be adjusted.

  By setting it as such a structure, the tension | tensile_strength of each diagonal material can be raised and fixing of a fixed plate can be performed more reliably.

The method of attaching the seismic ceiling according to the present invention includes attaching an anchor to the upper structure, and fixing the upper end of the column with a fixing plate temporarily fixed to the lower end to the anchor and hanging the column from the upper structure, Fixing the upper ends of a plurality of suspension members to the upper structure and hanging down;
Assembling a ceiling foundation by attaching a field edge receiver and field edge to the lower end of the suspension member;
Adjusting the height level of the temporarily fixed plate with a height level adjusting means;
A step of temporarily placing a ceiling vibration control device that absorbs displacement of the ceiling material during an earthquake between the field edge receiver or the field edge, a step of attaching a ceiling material to the lower surface of the field edge, and the ceiling vibration control Fixing the apparatus to the fixing plate and the ceiling member.

  According to the present invention, after assembling the ceiling base at the lower end of the suspension member by hanging the support column temporarily fixed to the lower end portion from the upper structure, hanging a plurality of suspension members from the upper structure, By adjusting the height of the fixing plate by the height level adjusting means, the height adjustment of the fixing plate with respect to the ceiling base can be reliably performed.

  In this state, the ceiling vibration control device can be installed securely if it is temporarily placed between the field receiver or the field edge, and then fixed easily and securely if the ceiling vibration control device is fixed to the fixed plate and ceiling material. It will be possible.

  In the present invention, when the column is attached to the upper structure, the upper structure is fixed and suspended at the upper ends of a plurality of diagonal members, and the lower ends of the diagonal members are connected to the fixing plate. Can be included.

  By adopting such a configuration, when attaching the struts to the upper structure, if the upper ends of a plurality of diagonal members are fixed to the upper structure and suspended, the diagonal members can be easily attached. At this time, if the lower end of the diagonal member is connected to the fixed plate, the diagonal member can be easily fixed when the height of the fixed plate is adjusted.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-7 is a figure which shows the earthquake-resistant ceiling structure which concerns on one embodiment of this invention.

  FIG. 1 is a longitudinal sectional view of an earthquake-resistant ceiling structure according to the present embodiment, and FIG. 2 is a plan view thereof. The earthquake-resistant ceiling structure 10 includes a field edge receiver 12, a field edge 14, a ceiling material 16, and a column. 18, a fixed plate 20, a brace 22 as an oblique material, and a ceiling vibration control device 24.

  The field edge receiver 12 is in a state in which a plurality of the field edge receivers 12 are suspended and held substantially parallel to a ceiling slab 28 as an upper structure via suspension bolts 26 as suspension members.

  As shown in FIG. 2, a plurality of the field edges 14 are attached and fixed at predetermined intervals on the lower surface side of the field edge receiver 12 so as to extend across the field edge receivers 12 substantially orthogonally to the field edge receivers 12. Yes.

  The ceiling material 16 is attached and fixed to the lower surface side of the field edge 14 with screws or the like to form a ceiling surface having a predetermined area.

    As shown in FIG. 2, a gap 32 having a predetermined interval is provided between the end of the ceiling member 16 located on the outer peripheral portion of the ceiling surface and the wall surface 30 in order to avoid a collision between the ceiling member 16 and the wall surface 30. Is provided.

  Moreover, the clearance gap 32 between the edge part of the ceiling material 16 and the wall surface 30 is covered with the surrounding edge 34 attached to the wall surface 30 side, as shown in FIG.

  The support column 18 supports the ceiling vibration control device 24 via the fixed plate 20, and as shown in FIG. 3, the upper end is attached to the ceiling slab 28 and is suspended from the ceiling slab 28, and the fixed plate is attached to the lower end. 20 can be attached.

  Specifically, as shown in FIG. 4, the column 18 has a pipe-like column main body 40 disposed between an upper plate 36 and a lower plate 38 with through holes, and these upper plate 36, lower plate 38, and column. Full screw bolts 42 are provided through the body 40, and the upper ends of the full screw bolts 42 are screwed into hole-in anchors 44 attached to the ceiling slab 28, and a plurality of height adjustments are made below the lower plate 38. With the washer 46 attached, the lower end of the entire screw bolt 42 is inserted into the column mounting hole 48 of the fixing plate 20 and the mounting nut 50 is screwed into the lower end of the entire screw bolt 42 from below the fixing plate 20. The fixed plate 20 is supported in a suspended state.

  Further, the support column 18 has a height level adjusting means 52 for adjusting the height level of the fixed plate 20.

  The height level adjusting means 52 can adjust the height level by changing the number of the height adjusting washers 46 according to the height to be adjusted and changing the position of the mounting nut 50 with respect to the entire screw bolt 42. It is like that.

  As shown in FIG. 5, the fixing plate 20 is attached to the column 18 and the brace 22, and includes a column mounting hole 48 at the center and brace lower end mounting brackets mounted at four locations around the column mounting hole 48. 58.

  The fixed plate 20 fixes one end of the ceiling vibration control device 24 and has ceiling vibration control device mounting holes 60 on both ends.

  The braces 22 are for fixing the fixed plate 20, and a plurality of, for example, four braces 22 are slanted from the ceiling slab 28 to the fixed plate 20.

  Specifically, as shown in FIG. 6, each brace 22 has a hole-in anchor 62 attached to the ceiling slab 28, and a brace upper end mounting bracket 66 is attached to the hole-in anchor 62 with a bolt 64. A bolt plate nut 68 with a cap nut is attached to the mounting bracket 66 with a bolt and nut 70, and a screw plate 76 with a full screw bolt is attached to the cap plate plate 68 with a cap nut via a turnbuckle 74. The top end is attached.

  Then, the lower end full-threaded bolt plate 72 is connected to the brace lower end mounting bracket 58 of the fixed plate main body 54 by bolts and nuts 78.

  In addition, the fixing plate 20 is fixed by adjusting the tension of each brace 22 with the turnbuckle 74.

  The ceiling vibration control device 24 is for absorbing the displacement of the ceiling material 16 at the time of an earthquake. As shown in FIGS. 7 (1) and (2), a fixed plate side mounting member 80 attached to the fixed plate 20 and The ceiling-side attachment member 82 attached to the ceiling material 16 side, and the viscoelastic material 84 having the upper and lower plates 86 provided between the fixed plate-side attachment member 80 and the ceiling-side attachment member 82 are provided. Thus, the ceiling vibration control device having a simple structure can be obtained, and a reliable vibration control effect can be obtained by the viscoelastic material 84.

  The ceiling side attachment member 82 is connected to the viscoelastic material 84 via a lower plate 86 attached to the viscoelastic material 84, and the fixed plate side attachment plate member 80 is connected to the viscoelastic material 84 via the upper plate 86. It is connected to.

  Further, a face material 88 is attached to the lower surface of the ceiling side attachment member 82, and a temporary placement member 90 is provided on the upper surface of the face material 88 for temporary placement between the field receivers 12.

  The temporary placement of the ceiling vibration control device 24 may be the field edge 14 instead of the field edge receiver 12.

  Further, the ceiling side attachment member 82 may be attached to the field edge receiver 12 or the field edge 14.

  As the viscoelastic material 84, a viscoelastic damper using a high damping material such as a high damping rubber can be used.

  The viscoelastic material 84 may be bonded to the upper and lower plates 86 using an adhesive, or may be integrated when vulcanizing high damping rubber or the like.

  Thus, by using the viscoelastic material 84, the seismic energy applied to the ceiling member can be reduced by the shear deformation of the viscoelastic material 84 during an earthquake.

  Next, the installation method of the earthquake-resistant ceiling using such an earthquake-resistant ceiling structure is demonstrated.

  First, the hole-in anchor 44 is attached to the ceiling slab 28, the upper end portion of the column 18 having the fixing plate 20 temporarily fixed to the lower end portion is fixed to the hole-in anchor 44, and the column 18 is suspended from the ceiling slab 28.

  In this case, when the column 18 is attached to the ceiling slab 28, if the upper ends of the plurality of braces 22 are fixed and suspended from the ceiling slab 28, anchors can be attached to the ceiling slab 28 at the same time. Easy installation.

  If the lower end of the brace 22 is connected to the fixed plate 20 at this time, the brace tension can be easily adjusted when the height level of the fixed plate 20 is adjusted.

  Next, the upper ends of the plurality of suspension bolts 26 are fixed to the ceiling slab 28 and suspended.

  In this state, the ceiling receiver 12 and the field edge 14 are attached to the lower end of the suspension bolt 26 to assemble the ceiling foundation.

  Next, the height level of the temporarily fixed fixing plate 20 is adjusted by the height level adjusting means 52.

  Thereby, the height adjustment of the fixed plate 20 with respect to the ceiling base can be reliably performed.

  At this time, the turnbuckle 74 is adjusted, the tension of the brace 22 is adjusted, and the fixing plate 20 is fixed.

  Next, the temporary placement member 90 provided in the ceiling vibration control device 24 is placed on the field receiver 12 to temporarily place the ceiling vibration control device 24.

  In this case, since the height level of the fixed plate 20 has already been adjusted with respect to the ceiling base, if the temporary placement is made, the positional relationship between the ceiling vibration control device 24 and the ceiling base will surely match.

  Next, the ceiling material 16 is attached to the lower surface side of the field edge 14.

  Then, after temporarily placing the ceiling vibration control device 24, the fixed plate side mounting member 80 and the fixed plate 20 are fixed, and the ceiling material 16 and the ceiling vibration control device 24, specifically, the face material 88 are fixed. Installation will be completed.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above-described embodiment, the ceiling slab is shown as the upper structure, but the present invention is not limited to this example, and a steel material or the like may be used.

  Further, although a brace using a turnbuckle as an oblique material has been shown, an angle material or the like can also be used.

It is sectional drawing which shows the earthquake-resistant ceiling structure concerning one embodiment of this invention. It is a top view of the earthquake-resistant ceiling structure of FIG. It is a principal part expanded sectional view of FIG. It is a disassembled perspective view of the support | pillar of FIG.1 and FIG.2. It is a top view of a fixed plate. FIG. 3 is an exploded perspective view of the brace of FIGS. 1 and 2. (1) is a plan view of the ceiling vibration control device, and (2) is a side view thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seismic-resistant ceiling structure 12 Field edge receiver 14 Field edge 16 Ceiling material 18 Support | pillar 20 Fixing plate 22 Brace 24 Ceiling damping device 26 Hanging bolt 28 Ceiling slab 44 Hole-in anchor 52 Height level adjustment means 80 Fixed plate side attachment member 82 Ceiling Side mounting member 84 Viscoelastic material

Claims (6)

A field receiver that is suspended and held from the upper structure via a suspension member, a field edge that is attached to the field edge receiver, and a ceiling material that is attached to the field edge,
A fixing plate is attached to the lower end of the column suspended from the upper structure via a height level adjusting means,
A seismic ceiling structure characterized in that a ceiling vibration control device for absorbing displacement of the ceiling material during an earthquake is interposed between the fixed plate and the ceiling material. In claim 1,
The ceiling vibration control device is provided between a fixed plate side mounting member mounted on the fixed plate, a ceiling side mounting member mounted on the ceiling material side, and the fixed plate side mounting member and the ceiling side mounting member. A seismic ceiling structure characterized by having a viscoelastic material. In claim 1 or 2,
The earthquake-resistant ceiling structure, wherein the fixed plate is supported by a plurality of diagonal members that are obliquely spanned with respect to the upper structure. In claim 3,
A seismic ceiling structure, wherein each diagonal member is adjustable in length. Attaching the anchor to the upper structure, and fixing the upper end of the column with the fixing plate temporarily fixed to the lower end to the anchor and hanging the column from the upper structure;
Fixing the upper ends of a plurality of suspension members to the upper structure and hanging down;
Assembling a ceiling foundation by attaching a field edge receiver and field edge to the lower end of the suspension member;
Adjusting the height level of the temporarily fixed plate with a height level adjusting means;
Temporarily placing a ceiling vibration control device that absorbs displacement of the ceiling material during an earthquake between the field margin or the field edge;
Attaching a ceiling material to the lower surface of the edge,
Fixing the ceiling damping device to the fixing plate and the ceiling material;
A method of installing a seismic ceiling, comprising: In claim 5,
When attaching the support column to the upper structure, the upper structure includes a step of fixing and hanging the upper ends of a plurality of diagonal members, and connecting the lower ends of the diagonal members to the fixing plate. How to install a seismic ceiling.

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