JP2014118743A - Ceiling structure and method of constructing ceiling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve earthquake resistance and to improve workability of construction.SOLUTION: A ceiling structure includes: a ceiling material suspended from a structure; a gap part which is formed between the ceiling material and a wall part and has a length equal to or larger than relative displacement between the ceiling material and the wall part due to an external load; and a closing material which has a length equal to or larger than the addition value of the length of the gap part and the relative displacement and has one end connected to the wall part to close the gap part from below.

Description

  The present invention relates to a ceiling structure and a method for constructing the ceiling structure.

  In a ceiling structure in which a ceiling material (for example, a ceiling panel) is connected to a wall (wall, column, etc.), the ceiling material and the wall are relatively displaced by an external load such as an earthquake or wind, which causes damage to the outer edge of the ceiling material. May end up.

  Therefore, an earthquake-resistant ceiling structure has been proposed in which a gap (hereinafter also referred to as a clearance) is provided between the wall and the outer edge of the ceiling material, and a displacement absorbing material that absorbs displacement due to an external load is interposed. (For example, refer to Patent Document 1).

JP 2007-291762 A

  In the ceiling structure of Patent Document 1 described above, a displacement absorbing material is provided above the ceiling material. In this case, there was a problem that the workability of the construction deteriorated. For example, when renovation work is performed, it is necessary to remove the ceiling material because the work cannot be performed from the indoor side, which increases the work period and cost. In addition, even in the case of new construction work, the process management became complicated due to interference with the equipment work inside the ceiling, which required a construction period and cost.

  This invention is made | formed in view of this subject, The place made into the objective is to provide the ceiling structure which can aim at the improvement of seismic resistance and the improvement of construction workability. is there.

In order to achieve this object, the ceiling structure according to the present invention is a ceiling material suspended from a structure, and a gap formed between the ceiling material and the wall portion, and the ceiling due to an external load. A gap portion having a length equal to or greater than a relative displacement between the material and the wall portion, and a closing material having a length equal to or greater than a sum of the gap portion and the relative displacement, one end of which is connected to the wall portion and the And a closing material for closing the gap from below.
According to such a ceiling structure, it is possible to improve the earthquake resistance and the workability of the construction.

In such a ceiling structure, it is desirable that a damping mechanism is provided between the ceiling material and the closing material.
According to such a ceiling structure, since the relative displacement can be reduced, the length of the closing material can be shortened, and the cost can be reduced.

In this ceiling structure, the damping mechanism may be a viscoelastic body or a viscous material, and may further include a holding mechanism that horizontally holds the closing material.
According to such a ceiling structure, the distance between the closing material and the ceiling material can be kept constant, and a damping effect can be stably obtained.

In this ceiling structure, the damping mechanism may be a friction material, and the plugging material may block the gap and press the ceiling material.
According to such a ceiling structure, the damping force of the relative displacement can be increased, and the length of the closing material can be shortened. Moreover, since it is not necessary to provide a pressing member, cost can be reduced.

In this ceiling structure, the damping mechanism is a friction material, and may further include a pressing member that presses the closing material against the ceiling material.
According to such a ceiling structure, the damping force of the relative displacement can be increased, and the length of the closing material can be shortened.

  In the ceiling structure construction method according to the present invention, the ceiling material suspended from the structure and the wall portion have a length greater than the relative displacement between the ceiling material and the wall portion due to an external load. A step of forming a gap, and a closing material having a length equal to or longer than the sum of the gap and the relative displacement is connected to one end of the closing material to the wall, and the gap is closed from below. And a step of installing in.

  In this ceiling structure construction method, the gap portion may be formed by cutting an end of the ceiling member on the wall side.

  A method of constructing such a ceiling structure, wherein the ceiling material is formed by a plurality of divided panels, and a panel used for an end portion on the wall side is shorter than other panels. It is good also as forming the said gap | interval part by changing to.

  According to the present invention, it is possible to improve the seismic resistance and the workability of construction.

It is a longitudinal cross-sectional view of the ceiling structure 10 of 1st Embodiment. It is the figure which expanded the connection part of the ceiling structure 10 and wall 101 of FIG. It is explanatory drawing of the ceiling structure 10 of 2nd Embodiment. It is explanatory drawing of the modification of the ceiling structure 10 of 2nd Embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

=== First Embodiment ===
FIG. 1 is a longitudinal sectional view of a ceiling structure 10 according to the first embodiment. FIG. 2 is an enlarged view of a connecting portion between the ceiling structure 10 and the wall 101 of FIG.

  The ceiling structure 10 of the present embodiment includes a suspension bolt 11, a ceiling panel 12, a closing material 14, and a viscoelastic material 15.

  The suspension bolt 11 is a bolt used to suspend the ceiling panel 12, and is provided so as to hang down from the upper layer structure (here, the floor 102) than the ceiling structure 10.

  A ceiling panel 12 (corresponding to a ceiling material) is attached to the lower end of each suspension bolt 11. That is, the ceiling panel 12 is suspended from the floor 102 by the suspension bolt 11. As shown in FIG. 1, in this embodiment, a clearance 13 (corresponding to a gap) is provided between the ceiling panel 12 and a wall 101 (corresponding to a wall).

  Note that the clearance 13 is provided if the ceiling panel 12 is directly connected to the wall 101 if the ceiling panel 12 is directly connected to the wall 101 due to an external load such as an earthquake or wind. This is because when the displacement occurs, the outer edge of the ceiling panel 12 may be damaged. By providing the clearance 13 so as to be equal to or greater than the relative displacement (amplitude Ds), the ceiling panel 12 can be prevented from being damaged. The amplitude Ds is the amount of movement from the position when the ceiling panel 20 and the wall 101 are not relatively displaced (reference) to one side in the horizontal direction. In other words, the magnitude of the amplitude Ds is half of the total amplitude (total amplitude) in the horizontal direction (see FIG. 2).

  Thus, in the ceiling structure 10 of the present embodiment, the clearance 13 having the length Dc (≧ Ds) is provided between the ceiling panel 12 and the wall 101.

  One end of the plugging material 14 is connected to the wall 101 and plugs the clearance 13 from below. In the present embodiment, the length L of the closing material 14 is determined to be equal to or greater than the sum of the length Dc of the clearance 13 and the amplitude Ds (L ≧ Dc + Ds: see FIG. 2). By doing so, it is possible to prevent the ceiling panel 12 from being detached from the closing material 14 even if relative displacement occurs (that is, the clearance 13 can always be closed with the closing material 14).

  The viscoelastic material 15 is a member that attenuates relative displacement (has a vibration control function), and is provided so as to be sandwiched between the ceiling panel 12 and the closing material 14. In this embodiment, for example, Scotchdamp (registered trademark: VEM manufactured by Sumitomo 3M Limited) is used as the preferred viscoelastic material 15. The viscoelastic material 15 corresponds to a damping mechanism.

  Thus, by providing the viscoelastic material 15 having a vibration control function between the ceiling panel 12 and the closing material 14, the relative displacement between the ceiling panel 12 and the closing material 14 (in other words, the wall 101) is suppressed. Is possible.

  Although not shown, in this case, for example, it is desirable to provide a holding member that horizontally holds the closing material 14 below the closing material 14. In this way, by keeping the closing material 14 horizontal, the interval (vertical direction interval) between the closing material 14 and the ceiling panel 12 can be made constant, and a stable attenuation effect can be obtained. .

<Construction method for ceiling structure>
Next, the construction method of the ceiling structure will be described.
In the present embodiment, a single ceiling panel (specifically, a panel whose periphery is larger than the ceiling panel 12 by the clearance 13 (referred to as a ceiling panel 12 'for convenience)) is used.
First, work on the ceiling (electrical wiring, duct piping, etc.). After the completion of the facility work, the ceiling panel 12 ′ is provided so as to be suspended from the floor 102 by the suspension bolt 11. And the outer edge part (part facing the wall 101) of ceiling panel 12 'is cut | disconnected only by clearance 13 (length Dc), and the ceiling panel 12 like FIG. 1 is formed.
Thereafter, one end of the closing material 14 is connected to the wall 101 and the other end side of the closing material 14 is connected to the lower surface of the ceiling panel 12 (with the viscoelastic material 15 interposed). Thus, the clearance 13 is closed with the closing material 14.

Thus, in this embodiment, after providing the clearance 13 between the ceiling panel 12 and the wall 101, the closing material 14 is provided so as to close the clearance 13 from below. A viscoelastic material 15 having a vibration control function is sandwiched between the ceiling panel 12 and the closing material 14.
As a result, for example, when repairing the closing material 14, it can be performed from the indoor side without removing the ceiling panel 12, and the construction period can be shortened and the cost can be reduced. Moreover, in the case of new construction work, it is possible to install the ceiling panel 12 after the installation work in the ceiling is completed, and then the closing material 14 can be provided from the indoor side. For this reason, there is no interference with facility construction, process management is simplified, and the construction period and costs can be reduced.
Thus, in the ceiling structure of this embodiment, the workability of construction can be improved.

  As described above, according to the ceiling structure 10 of the present embodiment, since the clearance 13 is provided between the ceiling panel 12 and the wall 101, the ceiling panel 12 and the wall 101 are caused by an external load such as an earthquake or wind. Even if relative displacement occurs, the outer edge portion of the ceiling panel 12 can be prevented from being damaged. In addition, the clearance 13 can be reliably closed because the closing member 14 has a length L equal to or greater than the added value of the clearance 13 (length Dc) and the relative amplitude (amplitude Ds). Furthermore, since the clearance 13 is closed from below by the plugging material 14, the work can be performed from the indoor side, and the workability of the work can be improved in both the renovation work and the new construction work.

  For example, laminated rubber may be used as the viscoelastic material 15. Further, a member (a member having a vibration control function) that attenuates the relative displacement is not limited to the viscoelastic material 15. For example, a viscous material may be used. Further, for example, a damper for vibration control may be provided between the ceiling panel 12 and the closing material 14.

=== Second Embodiment ===
FIG. 3 is an explanatory diagram of the ceiling structure 10 of the second embodiment.
3, parts having the same configurations as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

The ceiling structure 10 of the second embodiment includes a friction material 16 and a leaf spring 17.
The friction material 16 is a member that attenuates relative displacement (has a vibration control function), and is provided on the upper surface of the closing material 14. The friction material 16 corresponds to a damping mechanism. That is, when a horizontal relative displacement occurs between the ceiling panel 12 and the wall 101 (blocking material 14), the ceiling panel 12 moves on the friction material 16. The frictional force between the closing material 14 and the ceiling panel 12 is determined by the friction coefficient of the friction material 16 and the pressing force between the closing material 14 and the ceiling panel 12.
As shown in the figure, the leaf spring 17 (corresponding to the pressing member) has an L-shaped cross section, the plate material on one side is connected to the side surface of the wall 101, and the plate material on the other side is connected to the lower surface of the plugging material 14. It is connected. The leaf spring 17 presses the closing material 14 upward. Thereby, the frictional force between the friction material 16 and the ceiling panel 12 becomes larger, and the relative displacement in the horizontal direction between the wall 101 and the ceiling panel 12 can be suppressed.

In addition, about the construction method of the ceiling structure 10, it is substantially the same as 1st Embodiment.
That is, the ceiling panel 12 is provided so as to have a clearance 13 with respect to the wall 101 as in the first embodiment. Then, after the ceiling panel 12 is formed, a closing material 14 (friction material 16) and a leaf spring 17 are provided so as to close the clearance 13.

  In the second embodiment, as in the first embodiment, it is possible to improve the earthquake resistance and improve the workability of the construction.

<Modification>
Drawing 4 is an explanatory view of the modification of ceiling structure 10 of a 2nd embodiment.
3, parts having the same configurations as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.
In this modification, instead of the plate spring 17, a plate material 171, a plate material 172, and a coil spring 173 are provided.
The plate material 171 is provided on the side surface of the wall 101.
The plate material 172 is provided on the lower surface of the closing material 14.
Further, the plate member 171 and the plate member 172 are pin-joined so as to be rotatable around the connection point at the connection point with the wall 101.
One end of the coil spring 173 is connected to the plate material 171, and the other end is connected to the plate material 172.
With the above configuration, the plate material 172 (and the closing material 14) is pressed against the ceiling panel 12.
Also in this modified example, it is possible to improve the earthquake resistance and improve the workability of the construction.

  In the second embodiment (and the modification), the closing material 14 is used as a member that closes the clearance 13, but the closing spring 14 is not used and the leaf spring 17 in FIG. 3 or the plate material 172 in FIG. The clearance 13 may be blocked. That is, the leaf spring 17 or the plate material 172 may be used as a closing material. In this case as well, the length in the horizontal direction of the member that closes the clearance 13 may be set to be equal to or greater than the sum of the clearance 13 (length Dc) and the relative displacement (amplitude Ds). By doing so, the clearance 13 can be blocked and the ceiling panel 12 can be pressed upward. In this case, the member that closes the clearance 13 directly presses the ceiling panel 12. By doing so, the damping force of the relative displacement can be increased, and the cost of the plugging material can be reduced.

=== About Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

<About wall 101>
In the above-described embodiment, the clearance 13 is provided between the ceiling panel 12 and the wall 101. However, the object of the clearance 13 is not limited to the wall 101, and may be a pillar, for example. The wall 101 and the pillar correspond to wall portions.

<About the ceiling panel 12>
Although the ceiling structure 10 of the above-described embodiment is configured by one ceiling panel 12, it may be configured by combining a plurality of panels (divided panels). In this case, when constructing the ceiling, a short panel having a shorter length than the other panels may be attached as a panel near the wall 101 (outer edge portion). In this way, the clearance 13 may be formed.
In the above-described embodiment, the ceiling panel 12 is suspended from the floor 102. However, the ceiling panel 12 may be suspended from a structure (for example, a beam) other than the floor 102.

<About the vibration control function>
In the ceiling structure 10 of the above-described embodiment, a member (viscoelastic material 15 or friction material 16) having a vibration control function is provided between the ceiling panel 12 and the closing material 14, but such a vibration control function is provided. The member which has is not necessarily provided. That is, there is no need for a vibration control function. It is sufficient that at least the clearance 13 is closed by the closing material 14 or the like.

DESCRIPTION OF SYMBOLS 10 Ceiling structure 12 Ceiling panel 13 Clearance 14 Closure material 15 Viscoelastic material 16 Friction material 17 Plate spring 101 Wall 102 Floor 171 Plate material 172 Plate material 173 Coil spring

Claims (8)

Ceiling material suspended from the structure,
A gap formed between the ceiling and the wall, the gap having a length equal to or greater than the relative displacement between the ceiling and the wall due to an external load;
A plugging material having a length equal to or longer than the sum of the gap and the relative displacement, the plug being connected to the wall part at one end and blocking the gap from below,
A ceiling structure characterized by comprising The ceiling structure according to claim 1,
A ceiling structure comprising an attenuation mechanism that attenuates the relative displacement between the ceiling material and the closing material. The ceiling structure according to claim 2,
The damping mechanism is a viscoelastic material or a viscous material,
A ceiling structure further comprising a holding mechanism for holding the closing material horizontally. The ceiling structure according to claim 2,
The damping mechanism is a friction material,
The ceiling structure is characterized in that the closing material closes the gap and presses the ceiling material. The ceiling structure according to claim 2,
The damping mechanism is a friction material,
The ceiling structure further comprising a pressing member that presses the closing material against the ceiling material. Forming a gap having a length equal to or greater than a relative displacement between the ceiling and the wall due to an external load between the ceiling suspended from the structure and the wall; and
A step of installing a plugging material having a length equal to or longer than the added value of the gap and the relative displacement, connecting one end of the plugging material to the wall, and closing the gap from below.
A method for constructing a ceiling structure characterized by comprising: It is a construction method of the ceiling structure according to claim 6,
The gap is formed by cutting an end on the wall side of the ceiling material.
The construction method of the ceiling structure characterized by this. It is a construction method of the ceiling structure according to claim 6,
The ceiling material is formed by a plurality of divided panels,
The gap portion is formed by changing the panel used for the end on the wall side to a short panel having a shorter length than other panels.
The construction method of the ceiling structure characterized by this.

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