WO2021229903A1

WO2021229903A1 - Suspended ceiling reinforcement structure

Info

Publication number: WO2021229903A1
Application number: PCT/JP2021/009351
Authority: WO
Inventors: 勉花井; 猛美尾崎
Original assignee: 株式会社えびす建築研究所
Priority date: 2020-05-11
Filing date: 2021-03-09
Publication date: 2021-11-18

Abstract

[Problem] To provide a suspended-ceiling reinforcement structure with which it is possible, with a simple implementation, to reinforce an existing suspended ceiling with adequate resilience so that the ceiling panels do not fall. [Solution] A reinforcement structure for reinforcing a suspended ceiling, the reinforcement structure comprising a joist, a ceiling panel fixed to the joist, and a fixing member for fixing the ceiling panel to the ceiling, wherein the suspended-ceiling reinforcement structure has a support member installed above the ceiling panel between the ceiling panel and the ceiling, and is equipped with a band-shaped member, an end portion of which being attached to the ceiling panel, and the portions other than the end portion are installed so as to be able to latch to the support member or the joist.

Description

Reinforcement structure of the suspended ceiling

The present invention relates to a structure for reinforcing a suspended ceiling, which can reinforce an existing suspended ceiling with sufficient proof stress so that the ceiling plate does not fall by simple construction.

In recent years, so-called suspended ceilings have been used in buildings with steel-framed and reinforced concrete structures and general houses. The suspended ceiling is often used because it can secure space for lighting, air conditioning, and water supply, and also has the effect of hiding the wiring and piping of the ceiling to improve the appearance.
However, the suspended ceiling may fall due to an earthquake or the like, and even if the building itself does not collapse, the fall of the suspended ceiling has caused an accident in which a resident is injured.
Therefore, various structures of a suspended ceiling with improved earthquake resistance of the suspended ceiling have been proposed. For example, Patent Document 1 proposes a seismic retrofitting structure for a ceiling, which can simplify the reinforcement work, reduce the cost, and does not significantly shorten the natural period of the ceiling by seismic retrofitting. Specifically, a plurality of hanging bolts having hangers at the tip thereof are hung from the building frame, and a plurality of field edge supports suspended by the hangers are provided in parallel at predetermined intervals in the longitudinal direction of the member. A ceiling seismic reinforcement mechanism in which a plurality of field edges provided in parallel so as to be orthogonal to the field edge receiver are connected by clips at the intersection with the field edge receiver, and a ceiling panel is fixed to the field edge receiver. The contact portion between the ceiling panel and the field edge, the contact portion between the field edge and the clip, the contact portion between the clip and the field edge receiver, and the contact portion between the field edge receiver and the hanger are each liquid. Alternatively, a reinforcing structure has been proposed in which a viscous adhesive is applied or injected.
Further, Patent Document 2 proposes a structure capable of receiving a ceiling material falling due to an earthquake or the like over a wide range in the horizontal direction. Specifically, it is a ceiling material fall prevention structure that prevents the ceiling material arranged below the superstructure from falling. A reinforcing face material fixed to the ceiling plate while being located below the ceiling plate of the ceiling material, and located below the reinforcing face material so as to surround a predetermined area on the lower surface of the reinforcing face material. The reinforcing band material fixed to the reinforcing surface material, the ceiling plate, the reinforcing surface material, and the reinforcing band material are provided so as to penetrate in the vertical direction, and the reinforcing band material is provided on the upper portion. A structure having a connecting member to be connected to the structure has been proposed.

Japanese Unexamined Patent Publication No. 2012-12912 Japanese Unexamined Patent Publication No. 2017-172138

However, the reinforced structure of the suspended ceiling according to the above proposal is not yet sufficient. Specifically, in the proposal of Patent Document 1, it is difficult for the adhesive to permeate between the field edge and the ceiling panel, or between the clip and the field edge receiver, and the strength of the structure of the suspended ceiling that has already been completed is reinforced. It was inadequate in degree.
Further, in the proposal of Patent Document 2, since it is necessary to newly fix the face material under the ceiling plate, the construction is complicated and it is insufficient from the viewpoint of reinforcement for the ceiling panel.
In short, the conventionally proposed reinforced structure does not reinforce the existing suspended ceiling with sufficient strength so that the ceiling plate does not fall by simple construction, but the reinforced structure of the suspended ceiling that satisfies such a demand. The current situation is that no proposal has been made yet.

Therefore, an object of the present invention is to provide a reinforced structure for a suspended ceiling, which can reinforce an existing suspended ceiling with sufficient proof stress so that the ceiling plate does not fall by simple construction.

As a result of diligent studies to solve the above problems, the present inventors have found that the above object can be achieved by adopting a structure in which a fiber sheet is hooked on a field edge holder in order to prevent the ceiling plate from falling. Further studies have been carried out, and the present invention has been completed.
That is, the present invention provides the following inventions.
1. 1. It is a reinforcing structure for reinforcing a suspended ceiling provided with a field edge, a ceiling plate fixed to the field edge, and a fixing member for fixing the ceiling plate to the ceiling.
It has a support member installed above the ceiling plate between the ceiling plate and the ceiling.
A reinforcing structure for a suspended ceiling, wherein an end portion is a strip-shaped member fixed to a ceiling plate, and a portion other than the end portion includes the support member or a strip-shaped member installed so as to be anchored to the field edge.
2. 2. The strip-shaped member is made of a fiber sheet, both ends thereof are fixed to the ceiling plate, the central portion thereof covers the support member, and the support member is installed so as to be located between the central portion and the ceiling plate. Reinforcement structure of the suspended ceiling according to 1.
3. 3. Further, the ceiling plate is provided with a reinforcing sheet having the entire length adhered to the ceiling plate, and the strip-shaped member is adhered to the reinforcing sheet and adhered to the ceiling plate via the reinforcing sheet 1 or 2. Reinforcement structure of the suspended ceiling.
4. The suspended ceiling reinforcement structure according to any one of 1 to 3, wherein the central portion is provided in contact with the support member without a gap.
5. The suspended ceiling reinforcement structure according to any one of 1 to 4, wherein the support member is a field edge receiver.

The reinforced structure of the suspended ceiling of the present invention can reinforce an existing suspended ceiling with sufficient proof stress so that the ceiling plate does not fall by simple construction.

FIG. 1 is a perspective view showing the overall configuration of the reinforced structure of the suspended ceiling of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a diagram corresponding to FIG. 2 schematically showing the operation of the reinforcing structure shown in FIG. FIG. 4 is a diagram corresponding to FIG. 2 schematically showing a reinforcing structure of another embodiment. FIG. 5 is a diagram corresponding to FIG. 2 schematically showing the operation of the reinforcing structure of another embodiment. FIG. 6 is a diagram corresponding to FIG. 2 schematically showing the operation of the reinforcing structure of another embodiment.

1 Reinforcement structure, 10 shafts, 20 field edge holders, 30 field edges, 40 gypsum board, 50 band-shaped members, 51 end parts, 53 center parts, 60 reinforcement sheets

Hereinafter, the present invention will be described in more detail.
The reinforcing structure 1 of the suspended ceiling of the present invention includes a field edge 30, a gypsum board 40 as a ceiling board fixed to the field edge 30, and a shaft 10 as a fixing member for fixing the gypsum board 40 ceiling board to the ceiling. And be prepared.
The reinforcing structure 1 has a field edge receiver 20 as a support member installed between the gypsum board 40 and the ceiling in a direction parallel to the gypsum board 40, and the end portion 51 is fixed to the gypsum board 40. The central portion 53, which is a portion other than the end portion 51, is provided with a band-shaped member 50 installed so as to be able to be anchored to the gypsum holder 20.
Hereinafter, it will be described in more detail.

[Basic structure of suspended ceiling]
The structure of the suspended ceiling in the present embodiment is a shaft 10 suspended from the ceiling (not shown), and a field edge holder 20 made of C-shaped steel fixed by fitting a nut to the threaded portion 11 at the tip (lower end) of the shaft. , The field edge 30 fixed to the field edge holder by a fastening member (not shown, a clip in the present embodiment), and fixed to the field edge via a fastening member (not shown, a screw in the present embodiment). It consists of gypsum board 40. The shaft 10 is installed vertically downward from the ceiling, and the field edge 30 is installed so as to be overlapped in the vertical direction of the field edge receiver 20 below the field edge receiver 20, and the field edge and the field edge receiver 20 are installed. It forms a grid pattern with. Such a structure is the same as a known suspended ceiling structure.
(Support member)
In the present embodiment, the support member is the field edge receiver 20, but any member other than the field edge 30 may be used. This is because the field edge 30 is fixed to the ceiling via the field edge receiver 20, but the field edge receiver 20 is also fixed to the ceiling via the shaft 10 in the first place, and the fixing strength to the ceiling is point. This is because the field edge 30 is considered to have the lowest yield strength. From this point of view, the shaft 10 or the like directly fixed to the ceiling is preferable, but from the viewpoint of satisfying both ease of construction and proof stress, the field edge receiver 20 is most preferable as the support member.

[Strip-shaped member and reinforcing sheet]
In the strip-shaped member of the present embodiment, as shown in FIGS. 1 and 2, both

end portions

51 and 51 are adhered to the gypsum board 40, the central portion 53 covers the field edge receiver 20, and the central portion 53 and the gypsum board 40 are attached. It is installed so that the gypsum holder 20 is located between them. Further, in the present embodiment, a reinforcing sheet 60 whose entire surface is adhered to the gypsum board 40 is further provided, and the strip-shaped member 50 is adhered to the reinforcing sheet 60 and is adhered to the reinforcing sheet 60 via the gypsum board 40. It is glued to.
The strip-shaped member 50 has a rectangular shape, and its length may be long enough to be installed across the field edge receiver 20. The width is arbitrary depending on the constituent material to be used, but is preferably 4 cm or more in order to exhibit sufficient proof stress.
The length of the end portion 51 is not particularly limited as long as it can exhibit sufficient adhesive strength, and various lengths can be adopted depending on the weight of the gypsum board 40 (type and weight of the ceiling board), for example. For heavy gypsum board or the like used as a ceiling board of a large-scale hall, it is preferable to set the length so that it is 5 cm or more.
The length of the central portion 53 may be such that it can be arranged so as to cover the upper surface of the field edge receiver 20, but as shown in FIG. 2, the central portion 53 has no gap on the upper surface of the field edge receiver 20. It is preferable to adjust the length so that it abuts. By arranging in this way, the band-shaped member 50 can immediately respond to the shaking caused by the earthquake and prevent the gypsum boat 40 from falling. At this time, if the gypsum board 40 is installed too loosely, the gypsum board 40 will be caught in the field edge receiver 20 by the band-shaped member 50 after the connection between the gypsum board 40 and the field edge 30 is disconnected, and an extra force will be applied to the band-shaped member 50. There is a possibility that a gap will be created between the gypsum boards 40 and there is a risk that parts of the suspended ceiling other than the gypsum boards will fall.
The reinforcing sheet 60 has a rectangular shape having the same width as the strip-shaped member 50, and its length is short because the strip-shaped member is not bent. The entire surface is adhered to the gypsum board with an adhesive.
(Constituent material)
The band-shaped member and the reinforcing sheet are made of the same material. The material used at this time is arbitrary depending on the type and weight of the ceiling board used, but it is strong in that it exhibits sufficient strength to withstand heavy gypsum boards used for large-scale holes and the like. A fiber sheet that satisfies both the permeability of the adhesive and the permeability of the adhesive is preferable. As the fiber sheet, a fiber sheet made of a woven fabric formed by using fibers having high strength and low elongation, for example, fibers such as vinylon, polyester, or high molecular weight polyethylene, and weaving them in two or three or more axes. Can be used. For example, a commercially available product such as “Alpha V Sheet” manufactured by Alpha Industry Co., Ltd., which is a vinylon biaxial sheet, can be used.
(glue)
The adhesive can be used without particular limitation as long as it has excellent adhesiveness to a gypsum board used as a ceiling board, a calcium silicate board, etc., but a heavy gypsum board used especially for a large-scale hole, etc. From the viewpoint of exhibiting a proof stress that can sufficiently withstand the above, it is preferable that the material has excellent permeability to a band-shaped member or a reinforcing sheet. Specifically, an epoxy-based adhesive, an acrylic-based adhesive, a silicone-based adhesive, or the like can be used. Specifically, commercially available products such as the product name "Alpha Tech 540V" and the product name "Alpha Tech 380" manufactured by Alpha Industry Co., Ltd. can be used.
As described above, by using the strip-shaped member and the reinforcing sheet made of the woven fabric in combination with the adhesive, the fibers formed in the woven structure of the fiber sheet in the strip-shaped member and the reinforcing sheet are used. Adhesive enters the gap, and it becomes possible to firmly fix the gypsum board and the band-shaped member. In particular, by adhering the band-shaped member and the gypsum board via the reinforcing sheet, the adhesive permeates through the band-shaped member and is more firmly fixed, so that a high reinforcing effect can be obtained.

[Reinforcement structure]
In the reinforcing structure of the present embodiment, the entire surface of the reinforcing sheet 60 is adhered to the gypsum board 40, and both end

portions

51 and 51 of the strip-shaped member 50 are adhered to the reinforcing sheet 60. As a result, the strip-shaped member 50 is adhered to the gypsum board 40 via the reinforcing sheet 60. Then, the reinforcing sheet is adhered directly under the field edge receiver 20, and the central portion 53 of the strip-shaped member 50 is in contact with the upper surface of the field edge receiver 20 without a gap. That is, the above-mentioned "interlocking" in the present invention does not have to be in a form of being entangled and locked, and includes a state in which a part of the band-shaped member abuts on the support member and the entire band-shaped member is caught. Is.

[Manufacturing of reinforced structure, action effect]
The reinforcing structure of the present embodiment can be easily installed on an existing suspended ceiling. That is, first, a reinforcing sheet prepared in a predetermined rectangular shape is adhered under the field edge holder 20 on the gypsum board 40 by using the above adhesive. Next, both

side portions

51 and 51 of the strip-shaped member 50 arranged in a predetermined rectangular shape are bonded to both end portions of the bonded reinforcing sheet sandwiching the field edge receiver using the above adhesive. At this time, the central portion 53 of the strip-shaped member 50 is positioned above the field edge receiver 20, and the length of the central portion 53 is adjusted so as to abut without a gap on the upper surface of the field edge receiver 20 as shown in FIG. And glue. It can be installed by such a simple construction method.
Then, as shown in FIG. 3, in the reinforcing structure 1 of the present embodiment, the fastening member connecting the field edge 30 and the gypsum board 40 is detached due to an earthquake or the like, or the fastening member between the field edge 30 and the field edge receiver 20 is removed. Even if the gypsum board 40 is removed (the state shown in FIG. 3), the band-shaped member 50 is in a state of being caught by the field edge receiver 20, and the gypsum board 40 can be prevented from falling. Further, since the position and inclination of the gypsum board do not change so much, it is possible to prevent the parts constituting the suspended ceiling from falling. As described above, the reinforcing structure of the present embodiment can exhibit sufficient proof stress even though the construction is particularly easy, and the risk of gaps between gypsum boards is low. It is also possible to prevent parts from falling.

[Other embodiments]
Hereinafter, other embodiments of the reinforcing structure of the present invention will be described. In the following description, the same parts of the above-described embodiment will not be particularly described, but different parts will be described. The description in the above-described embodiment is valid for points not particularly described.
In the reinforcing structure 101 of the embodiment shown in FIG. 4, the end portion 51'of the strip-shaped member 50'is adhered to the gypsum board 40, and the other end portion 52' is folded back and adhered to the central portion 53'. 'Is formed, and this ring 55'is locked to the gypsum holder 20. At this time, it is preferable that the end portion (adhesive end) on the central portion side of the end portion 51'is located directly below the field edge receiver 20. It is also possible to lock in such a form, and it is effective in a state where it is located at the end of the structure and the structure shown in FIG. 1 cannot be formed.
In the reinforcing structure 201 of the embodiment shown in FIG. 5, the band-shaped member 50'' is locked by adhering the end portion 51'' to the gypsum board 40, and the other end portion 52'' is the field edge receiver 20''. Adhesive (fixed with adhesive) to. At this time, it is preferable that the end portion (adhesive end) on the central portion side of the end portion 51'' is located directly below the field edge receiver 20. In this example, an example of adhesion is shown, but the present invention is not limited to this, and the adhesive can also be fixed via an anchor. If a part of the strip-shaped member is in contact with each other as in the present embodiment, it corresponds to the "locking" in the present invention.
The reinforcing structure 301 of the embodiment shown in FIG. 6 is different from the first embodiment in that a screw 370 as a fastening member is used to fix the band-shaped member 50 to the gypsum board 40. As described above, in the present invention, the fixing of the strip-shaped member is not limited to the above-mentioned adhesion, and can be fixed via various fastening members. In addition, in FIG. 6, the example in which the screw 370 is installed at a plurality of places over the length direction of the end portion 51 has been described, but more preferably, the screw is placed only on the portion of the end portion 51 located on the central portion side. It is a mode to install. At this time, a plurality of screws can be provided in the width direction. By installing in this way, it is possible to efficiently reinforce only the stressed portion and to reinforce the suspended ceiling structure more firmly with a simpler configuration.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the ceiling board is not limited to gypsum board, and various materials such as wood and metal can be used as long as it is a plate-shaped material.
The band-shaped member may be directly adhered to the gypsum board without using the reinforcing sheet.
The support member is not limited to the field edge receiver, but may be a hanging hanger, a hanging tool, a field edge, a channel material for a system ceiling, a T-bar, or the like.
Further, in the above example, the example in which the band-shaped member is locked or fixed to the field edge receiver as the support member has been described, but the band-shaped member may be directly locked or fixed to the field edge.
The band-shaped member has been described in the example of being installed so as to straddle the support member, but the present invention is not limited to this, and the band-shaped member may be fixed to the support member.

Claims

It is a reinforcing structure for reinforcing a suspended ceiling provided with a field edge, a ceiling plate fixed to the field edge, and a fixing member for fixing the ceiling plate to the ceiling.
It has a support member installed above the ceiling plate between the ceiling plate and the ceiling.
Reinforcing structure of a suspended ceiling including a strip-shaped member whose end portion is fixed to a ceiling plate and whose portion other than the end portion is provided with a strip-shaped member which can be locked or fixed to the support member or the field edge. ..
The strip-shaped member is made of a fiber sheet, both ends thereof are fixed to the ceiling plate, the central portion thereof covers the support member, and the support member is installed so as to be located between the central portion and the ceiling plate. The reinforced structure of the suspended ceiling according to claim 1.
Further, the ceiling plate is provided with a reinforcing sheet which is tape-shaped and has at least a part bonded in the width direction over the entire longitudinal direction thereof, and the strip-shaped member is bonded to the reinforcing sheet. The reinforcing structure for a suspended ceiling according to claim 1 or 2, which is adhered to the ceiling plate via a reinforcing sheet.
The reinforcing structure for a suspended ceiling according to any one of claims 1 to 3, wherein the central portion is provided in contact with the support member without a gap.
The reinforcing structure for a suspended ceiling according to any one of claims 1 to 4, wherein the support member is a field edge receiver.