JP2014218854A - Aseismatic ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismatic ceiling 1 capable of preventing drop of a ceiling material caused by impact of collision between the ceiling and a wall in an earthquake.SOLUTION: An aseismatic ceiling includes a ceiling backing material 10 suspended from a ceiling slab, and a ceiling material 16 attached to a lower surface of the ceiling backing material 10, and a filler 4 is filled between a receiving member attached around an outer periphery of the ceiling backing material 10 and a wall surface opposite thereto. The filler 4 regulates shaking of the ceiling and prevents collision of an outer peripheral end of the ceiling with the wall in an earthquake by being filled between the receiving member on the ceiling backing material 10 side and the wall surface in a corresponding position. The receiving member is constituted by a ceiling joist receiver 13 of the ceiling backing material 10 or a ceiling joist 15.

Description

  TECHNICAL FIELD The present invention relates to a seismic ceiling that enhances seismic resistance and prevents a fall due to an earthquake in a ceiling of a building.

  Traditionally, suspended ceilings in buildings such as reinforced concrete have a hanging bolt suspended under the ceiling slab of the frame, and a plurality of rod-shaped field edge receivers are attached to a bracket called a hanger attached to the lower end of this hanging bolt. A plurality of rod-shaped field edges that are suspended horizontally and parallel to each other and are attached to the field edge receiver via a clip are installed horizontally and parallel to each other, thereby constructing a ceiling base material composed of these members. It is generally known that a ceiling material is attached to the lower surface of the edge, and a parting edge that covers the gap on the outer peripheral side of the ceiling material from below is attached to the wall surface.

  In order to increase the earthquake resistance of such a suspended ceiling, the ceiling is shaken by installing a brace as an oblique material between the upper part of the suspension bolt and the lower part of the suspension bolt adjacent to the suspension bolt or the field edge receiver. In addition, the ceiling material is provided with a sufficient clearance between the ceiling material and the surrounding wall so that the ceiling material does not collide with the wall and fall during an earthquake.

  However, in the structure in which a brace is installed to prevent shaking and a clearance is provided between the outer peripheral edge of the ceiling and the wall, a brace necessary for calculation may be provided depending on the arrangement of equipment on the back of the ceiling. Depending on the conditions of use of the room such as a clean room, it may not be possible to provide sufficient clearance between the outer peripheral edge of the ceiling and the wall. If braces and sufficient clearance cannot be provided, the outer periphery of the ceiling may repeatedly collide with the wall due to shaking of the ceiling during an earthquake, and the ceiling material may fall off the field edge due to the impact and fall.

  Further, if there is no clearance between the ceiling and the wall, that is, if the structure is such that the ceiling and the wall are always in contact, the collision between the ceiling and the wall should not occur. However, a certain degree of clearance between the ceiling and the wall is unavoidable in construction, and it is actually difficult to make a structure that always contacts.

  Therefore, in order to prevent the ceiling material from shaking and its outer peripheral edge colliding with the wall surface, a technique for interposing a displacement absorbing member made of a high damping material between the field edge receiver or the outer edge of the field edge and the wall. Has also been proposed (see, for example, Patent Document 1).

  However, according to the technique disclosed in Patent Literature 1, the displacement absorbing member is bonded to both the ceiling-side mounting member that is attached to the outer edge of the field receiver or the field edge, and the wall-side mounting member that is attached to the wall surface. Therefore, the structure is complicated and the installation work is complicated.

JP 2007-291762 A

  The present invention has been made in view of the above points, and its technical problem is to provide an earthquake-resistant ceiling that prevents the ceiling material from falling due to the impact of a ceiling-wall collision during an earthquake. is there.

  As means for effectively solving the technical problem described above, the earthquake-resistant ceiling according to the invention of claim 1 includes a ceiling base material suspended from a ceiling slab, and a ceiling material attached to the lower surface of the ceiling base material. And a filling material is filled between a receiving material attached along the outer periphery of the ceiling base material and a wall surface facing the receiving material.

  According to this configuration, since the horizontal displacement force due to the earthquake is transmitted from the building wall of the building to the ceiling (earthquake-resistant ceiling) via the filler, the ceiling is displaced integrally with the building wall. Therefore, it is possible to prevent the outer peripheral end of the ceiling from colliding with the wall surface.

  The seismic ceiling according to the invention of claim 2 is characterized in that, in the configuration described in claim 1, the receiving material is a field edge receiver or a field edge in the ceiling base material.

  The seismic ceiling according to the invention of claim 3 is characterized in that, in the configuration described in claim 1 or 2, the filler can be expanded or contracted in the horizontal direction or plastically deformed.

  The seismic ceiling according to the invention of claim 4 is characterized in that, in the structure described in any one of claims 1 to 3, a wall-side receiving material in contact with the filler is attached to the wall surface. is there.

  According to the earthquake-resistant ceiling according to the present invention, the filling material filled between the receiving material attached along the outer periphery of the ceiling base material and the wall surface facing the receiving material regulates the shaking of the ceiling in the event of an earthquake. Therefore, it is possible to effectively prevent the ceiling material from falling off the ceiling base material due to an impact when the outer peripheral edge of the ceiling collides with the wall due to an earthquake.

  Further, by using a field edge receiver or a field edge in the ceiling base material as the receiving material, an increase in cost can be prevented.

  In addition, by using a filler that can be stretched or plastically deformed in the horizontal direction, even if there is a clearance tolerance between the outer periphery of the ceiling base material and the wall surface, it can be filled easily and construction is easy. It is.

  Also, by using the wall-side receiving material according to the clearance between the outer periphery of the ceiling base material and the wall surface and the material of the filler, the filling amount of the filler can be adjusted, or the filler can be retained by bonding Can be made easier.

It is the perspective view which looked at preferable 1st embodiment of the earthquake-resistant ceiling which concerns on this invention from the ceiling back space side. It is sectional drawing which shows preferable 1st embodiment of the earthquake-resistant ceiling which concerns on this invention, (A) is the Y direction sectional view of the A section in FIG. 1, (B) is the X direction sectional view of the B section in FIG. is there. Sectional drawing which shows preferable 2nd embodiment of the earthquake-resistant ceiling which concerns on this invention, (A) is Y direction sectional drawing of the same position as A part in FIG. 1, (B) is the same position as B part in FIG. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an earthquake-resistant ceiling according to the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment.

  First, in FIG. 1, reference numeral 1 is a seismic ceiling according to the present invention, and reference numeral 2 is a frame wall, which is a reinforced concrete wall, a lightweight steel foundation wall, or a lightweight aerated concrete (ALC) wall.

  The earthquake-resistant ceiling 1 includes a plurality of rod-shaped field edge receivers 13 made of hot-dip galvanized steel plates and the like at the lower ends of a number of suspension bolts 11 suspended from a ceiling slab (not shown) in the frame horizontally and parallel to each other A plurality of rod-shaped field edges 15 made of hot-dip galvanized steel plates or the like are attached to the bottom of the field edge receiver 13 via the clips 14 so as to be orthogonal to each other in a grid-like manner. The ceiling base material 10 is constructed, and a large number of ceiling materials 16 made of fireproof boards are attached to the lower surface of the field edge 15 in a state where they are packed vertically and horizontally (XY directions).

Between the ceiling slab (not shown) and the lattice-like ceiling base material 10, a plurality of braces 17 _X and 17 _Y are arranged in which reinforcing members made of a pair of steel plates or the like are assembled in a substantially V shape. . Of these, the brace 17 _X extends along a vertical plane parallel to the field receiver 13, that is, suppresses the shaking of the earthquake-resistant ceiling 1 in the extending direction (X direction) of the field receiver 13. 17 _Y extends along a vertical plane parallel to the field edge 15, that is, suppresses shaking of the earthquake-resistant ceiling 1 in the extending direction (Y direction) of the field edge 15.

  As shown in FIG. 2, the four side walls of the frame wall 2 are arranged below the outer peripheral edge of the lower surface of the ceiling material 16 to close the gap G between the ceiling material 16 and the wall surface of the frame wall 2. Edge 3 is attached. Further, a filler 4 is filled between the outer peripheral end face (four end faces) of the ceiling base material 10 and the wall surfaces 2x and 2y of the housing wall 2 at positions corresponding thereto.

Specifically, among the plurality of field receivers 13 constituting the ceiling base material 10, the outermost field receiver 13 _O on the outermost side (X direction wall surface 2x side of the frame wall 2) and the outermost side (Y direction wall surface of the frame wall 2). The field edge 15 _O on the 2y side is disposed along the outer periphery of the ceiling base material 10 and has a function as a receiving material for the filler 4. Specifically, the field edge receiver 13 _O is located at the end of the field edge 15 as shown in FIG. 2A, and the field edge 15 _O is connected to the field edge receiver as shown in FIG. The filler 4 is filled between the field receiver 13 _O and the X-direction wall surface 2x, and between the field edge 15 _O and the Y-direction wall surface 2y.

As the filler 4, a synthetic resin sealing material or caulking material for construction, a backup material made of synthetic rubber or synthetic fiber used in sealing work, a spacer made of a hollow (tubular) or solid rubber elastic body, and the like are suitable. It can be used, and is bonded to both the field edge receiver 13 _O and the X direction wall surface 2 x of the frame wall 2, or both the field edge 15 _O and the Y direction wall surface 2 y of the frame wall 2.

The filler 4 may be bonded to the field edge receiver 13 _O and the X-direction wall surface 2x of the housing wall 2 or the field edge 15 _O and the Y-direction wall surface 2y using an adhesive, but a sealing material, a caulking material, etc. When is used as the filler 4, the adhesive itself can be appropriately applied, so that application of the adhesive can be omitted.

According to seismic ceiling 1 of the above configuration, even acts horizontal displacement force caused by the earthquake, (relative displacement with respect skeleton wall 2) vibration of seismic ceiling 1 in the X direction shown in FIG. 1, inhibition by braces 17 _X And the compressive force of the filler 4 interposed between the outermost field edge 15 _O which is the ceiling base material side receiving material and the Y-direction wall surface 2y of the frame wall 2, in other words, in the X direction due to the earthquake. Since the horizontal displacement force is transmitted from the Y-direction wall surface 2y to the ceiling base material 10 via the filler 4, the earthquake-resistant ceiling 1 is displaced integrally with the frame wall 2 in the X direction. Further, (relative displacement with respect skeleton wall 2) vibration of seismic ceiling 1 in the Y direction shown in FIG. 1, the suppression effect of the brace 17 _Y, and 13 _O outermost field edge receiving a ceiling base member side receiving member The horizontal displacement force in the Y direction caused by the earthquake is suppressed from the X direction wall surface 2x through the filler material 4 by the compressive force of the filler material 4 interposed between the X direction wall surfaces 2x of the frame wall 2. Since it is transmitted to the material 10, the earthquake-resistant ceiling 1 is displaced integrally with the frame wall 2 in the Y direction. For this reason, the outer peripheral edge of the ceiling is reliably prevented from colliding with the X-direction wall surface 2x or the Y-direction wall surface 2y due to the earthquake, and as a result, the ceiling material 16 is dropped from the field edge 15 due to the impact caused by the collision. To prevent and increase safety.

In the construction of the earthquake-resistant ceiling 1 having the above-described structure, first, a plurality of suspension bolts 11 attached to the ceiling slab by a known method and the lower ends of the required number of braces 17 _X and 17 _Y are provided with a plurality of field edges via hangers 12. A grid-like ceiling is formed by hanging the receiver 13 horizontally and in parallel with each other, and attaching a plurality of field edges 15 in parallel to each other via the clips 14 below the field edge receiver 13. The base material 10 is constructed. In this example, the outermost field edge receiver 13 _O and the field edge 15 _O are incorporated along the outer periphery of the ceiling base material 10.

Next, between the outermost field edge receiver 13 _O and the X-direction wall surface 2x of the housing wall 2 that faces and opposes the outermost field edge receiver 13 _O, and the outermost field edge 15 _O and the Y-direction wall surface of the housing wall 2 that faces and opposes this. Filler 4 is filled between 2y. At this time, when an amorphous material selected from a sealing material, a caulking material, and a sealing backup material is used as the filler 4, these materials before curing can be flexibly plastically deformed, so that they are easily filled. be able to. Further, in the case of a hollow or solid rubber elastic body, by using a material whose width is larger than the gap between the field edge receiver 13 _O or the field edge 15 _O and the housing wall 2, the flexible elastic deformation While being able to fill easily, the damping property by moderate compression force can be provided. Moreover, the filler 4 is simpler and less expensive than a viscoelastic body vulcanized between a ceiling side mounting member attached to the ceiling side and a wall surface side mounting member attached to the frame wall 2. Can be constructed.

  And the ceiling material 16 is affixed to the lower surface of the field edge 15 in the ceiling base material 10, and the construction is completed by attaching the parting edge 3 covering the surrounding gap G to the wall surfaces 2x and 2y of the frame wall 2.

  Next, FIG. 3 shows a second embodiment of the earthquake-resistant ceiling according to the present invention.

The second embodiment is different from the first embodiment described above in that the filler 4 is attached to the outermost field receiver 13 _O and the X-direction wall surface 2x of the housing wall 2 facing this. Between the wall-side receiving material 5 and between the outermost field edge 15 _O of the ceiling base material 10 and the wall-side receiving material 5 attached to the Y-direction wall surface 2y of the frame wall 2 facing this. It is in being filled.

The wall-side receiving material 5 is the distance between the outermost field edge receiver 13 _O and the X-direction wall surface 2x of the opposite body wall 2 or the outermost field edge 15 _O and the body wall 2 facing this. It functions as a spacer for adjusting the size of the filling gap of the filler 4 when the distance from the Y-direction wall surface 2y is relatively large, and is made of, for example, a hollow lightweight steel material.

Therefore, in the construction of the earthquake-resistant ceiling 1 having the above-described structure, first, the lattice-like ceiling base material 10 is constructed in the same manner as described above, and then the outermost field receiver 13 _O is placed on the X-direction wall surface 2x of the frame wall 2. The opposing wall-side receiving material 5 is arranged and attached, and the wall-side receiving material 5 opposite to the outermost field edge 15 _O is arranged and attached to the Y-direction wall surface 2 y of the frame wall 2.

Then, the filler 4 is filled between the outermost field edge receiver 13 _O and the outermost field edge 15 _O and the wall-side receiving material 5 adjacent to and opposed to the outer edge field edge 15 _O, and the lower surface of the field edge 15 in the ceiling base material 10. Attaching the ceiling material 16 to the wall and attaching the parting edge 3 covering the gap G around the ceiling material 16 to the wall surfaces 2x and 2y of the frame wall 2 completes the construction.

In each of the above-described embodiments, the field edge receiver 13 _O and the field edge 15 _O arranged along the outer periphery of the ceiling foundation material 10 are used as the receiving material for the filler 4. It can also be used as a receiving material by attaching, for example, channel steel or angle steel along the outer periphery.

1 Seismic ceiling 10 Ceiling base material 13 Field edge receiver 13 _O Field edge receiver (receiving material)
15 Field 15 _O Field (receiving material)
16 Ceiling material 2 Frame wall 2x X direction wall surface 2y Y direction wall surface 3 Parting edge 4 Filling material 5 Wall side receiving material

Claims (4)

  A ceiling base material suspended from the ceiling slab; a ceiling material attached to a lower surface of the ceiling base material; a receiving material attached along an outer periphery of the ceiling base material; and a wall surface facing the receiving material. A seismic ceiling that is filled with a filler.   The earthquake-resistant ceiling according to claim 1, wherein the receiving material comprises a field edge receiver or a field edge in a ceiling base material.   The earthquake-resistant ceiling according to claim 1 or 2, wherein the filler can be stretched or deformed in the horizontal direction or plastically deformed.   The earthquake-resistant ceiling according to any one of claims 1 to 3, wherein a wall-side receiving material in contact with the filler is attached to the wall surface.

Images