Smokeproof hanging wall

Abstract

To provide a smokeproof hanging wall which hardly causes the breakage of a part connected to a building wall, when an earthquake occurs, which can ensure a smokeproof function before and after an earthquake, and which prevents deteriorate in beauty by virtue of proper visibility.SOLUTION: A smokeproof hanging wall comprises a smokeproof hanging wall body which is mounted on a ceiling of a building, and a base-isolated part which is mounted on the smokeproof hanging wall body or the ceiling and which is positioned on the wall side of the building with respect to the smokeproof hanging wall body. The base-isolated part has a base-isolated member which abuts on a building wall without being fixed thereto and which has transparency and flexibility.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hanging smoke barrier. [Background technology]

[0002] Smoke-blocking vertical walls are installed in the ceilings of buildings and other structures to prevent the spread of smoke in the event of a fire and ensure evacuation time. However, when the smoke barrier is fixed to a wall, there is a concern that the connection between the smoke barrier and the wall may be damaged due to the movement of the wall caused by earthquake shaking.

[0003] To address this problem, for example, in Patent Document 1 (Utility Model Registration No. 3175735), a soft plate-shaped cushioning member is fitted, via a fitting member, into the outer opening of a decorative cover for a hanging bolt, which is provided at both the left and right ends of a partition vertical smoke barrier and has an H-shaped or approximately H-shaped cross-sectional shape. In addition, in Patent Document 2 (Utility Model Registration No. 3172946), the upper rail of the smoke barrier vertical wall is stopped at a position about 50 to 100 mm in front of the wall / pillar to prevent the generation of stress caused by the wall / pillar pushing against each other at the contact point during an earthquake. Also, to prevent the movement of smoke within the compartment and to prevent secondary damage caused by the breakage or destruction of the glass during an earthquake, a structure is installed between the wall / pillar for the purpose of shock absorption for deformation tracking, which is made of calcium silicate board (which absorbs the displacement stress between the wall / pillar and the glass with calcium silicate board and does not transmit it to the glass) and a non-combustible sheet seismic isolation wall mullion (which absorbs damage to members due to shaking during in-plane displacement and some out-of-plane displacement). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3175735 [Patent Document 2] Utility Model Registration No. 3172946 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, there is a demand for smoke barrier walls that are highly visible and do not spoil the aesthetic appearance, but the above-mentioned Patent Documents 1 and 2 do not take this into consideration.

[0006] Therefore, the present invention aims to provide a smokeproof vertical wall whose connection with the wall of a building is unlikely to break when an earthquake occurs, which can ensure its smokeproof function both before and after an earthquake, and which has good visibility and does not impair the aesthetic appearance. [Means for solving the problem]

[0007] In order to achieve this object, the present invention provides: A smoke barrier body attached to a ceiling of a building; A seismic isolation section attached to the smokeproof hanging wall main body or the ceiling and located on the wall side of the building relative to the smokeproof hanging wall main body; having the seismic isolation unit includes a seismic isolation member that is in contact with the wall of the building without being fixed thereto and that has transparency and flexibility; To provide a smoke-proof hanging wall characterized by the above. Here, the term "building" conceptually includes the structure of columns and the like, and is not limited in any way as long as it is an object on which a smoke barrier wall can be installed.

[0008] In the smoke barrier wall of the present invention having such a configuration, the seismic isolation part is not fixed to the wall, but to the smoke barrier wall body or the ceiling, so it is not damaged by the shaking of the wall even during an earthquake. Furthermore, since the seismic isolation part can deform in response to the shaking of the wall via the seismic isolation member, it can abut against the wall before and after the earthquake and ensure the smoke-proof function. Furthermore, the seismic isolation part is transparent and does not spoil the aesthetic appearance.

[0009] In the smoke barrier vertical wall of the present invention, it is preferable that the seismic isolation member is formed by curving a sheet into an approximately U-shape, with the approximately U-shaped protrusion being abutted against the wall of the building.

[0010] According to the smoke-proof vertical wall of the present invention having such a configuration, the approximately U-shaped convex portion deforms in response to the swaying of the wall and maintains its abutting state against the wall, thereby reliably ensuring the smoke-proof function.

[0011] In the smoke barrier of the present invention, it is preferable that the total light transmittance is 20% or more and the haze value is 95% or less when the sheet is laid in two layers (10 mm apart) and measured.

[0012] According to the smoke barrier vertical wall of the present invention having such a configuration, even if the seismic isolation member is composed of two sheets, sufficient transparency and haze for visibility can be ensured.

[0013] In the smoke barrier of the present invention, it is preferable that the sheet has a bending resistance as defined by JIS-L-1096 of 200 mN or less.

[0014] According to the smoke barrier hanging wall of the present invention having such a configuration, the seismic isolation member has appropriate flexibility and rigidity, making it easy to install and preventing bending, deformation, and whitening. Effect of the Invention

[0015] According to the present invention, the seismic isolation section is not fixed to the wall, but to the main body of the hanging smoke barrier or the ceiling, so the hanging smoke barrier will not be damaged during an earthquake. Also, since the seismic isolation section abuts against the wall before and after the earthquake, the smoke barrier function can be guaranteed. Furthermore, the seismic isolation section is transparent, so it does not spoil the aesthetic appearance. [Brief description of the drawings]

[0016] [Figure 1] 1A to 1C are a front view, a cross-sectional view, and a longitudinal section view illustrating a smoke-proof hanging wall 1 according to a representative embodiment of the present invention. [Diagram 2] 2A to 2C are a front view, a bottom view and a side view of the seismic isolation section 5. [Diagram 3] FIG. [Figure 4]1A and 1B are a front view and a side view of a frame F used for checking the transmission of a sheet sample SS. [Diagram 5] FIG. 13 is a diagram showing an example of characters used for confirming the transparency of a sheet sample SS. [Figure 6] FIG. 13 is a diagram showing an example of a criterion for checking the transmission of a sheet sample SS. [Figure 7] FIG. 1 is a diagram showing a test method for evaluating the folding of a sheet sample SS. [Figure 8] FIG. 13 is a diagram showing an example of criteria for evaluating the folding of a sheet sample SS. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a representative embodiment of the smoke barrier wall according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to those shown in the drawings. In addition, since each drawing is intended to conceptually explain the present invention, the ratio of size, length, and quantity may be exaggerated or simplified as necessary for easy understanding. Furthermore, in the following description, the same or equivalent parts are given the same reference numerals, and duplicated descriptions may be omitted.

[0018] The vertical smoke barrier 1 is attached to the ceiling 8 of a building or the like so as to extend substantially vertically downward, and prevents the flow and diffusion of smoke in the event of a fire. Here, the building includes a structure such as columns. As shown in FIG. 1, the smokeproof hanging wall 1 includes a main body (smokeproof hanging wall main body) 3 and a seismic isolation section 5.

[0019] First, the main body 3 will be described. The main body 3 includes a main body frame 30 made of a metal material such as aluminum, and a transparent, non-flammable sheet material 35 attached to the main body frame 30.

[0020] In this embodiment, a panel type is adopted as the main body frame 30. That is, the main body frame 30 includes an upper rail 31 fixed to the ceiling 8 or the like, a lower rail 32 facing the upper rail 31, and end mullions 33, 34 connecting the ends of the upper rail 31 and the lower rail 32 to each other. A recess or receiving portion 321 for mounting the seismic isolation portion 5 may be provided in either or both of the upper rail 31, the lower rail 32, and the end mullions 33, 34. In the example of FIG. 2(C), the receiving portion 321 constitutes a part of the lower rail 32. The main body frame 30 may be of a tension type. The main body frame 30 may be configured so that its length in the vertical direction (up and down direction) and horizontal direction can be adjusted.

[0021] As the sheet material 35, any transparent resin sheet can be used, for example, vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, curable acrylic resin, epoxy resin, etc.

[0022] Next, the seismic isolation portion 5 will be described. For example, as shown in Figures 1(A) and (B), the seismic isolation unit 5 is located closer to the wall side of the building than the main body 3. In other words, the seismic isolation unit 5 is interposed between the main body 3 and the wall 7 of the building. In the figures, the seismic isolation unit 5 is attached to the main body 3, but it may also be attached to the ceiling 8. When attached to the ceiling 8, the seismic isolation unit 5 is installed with no gap between the wall 7 of the building and the main body 3. Also, the seismic isolation unit 5 abuts or comes into contact with the wall 7 of the building, but is not fixed to the wall 7. The seismic isolation unit 5 can be provided on one side of the main body 3, but it is preferable to provide it on both sides of the main body 3 in order to further suppress damage during an earthquake.

[0023] The seismic isolation section 5 includes a transparent and flexible seismic isolation member 51. That is, the seismic isolation member 51 is formed by bending a sheet into a substantially U-shape, and a protruding portion of the substantially U-shape is in contact with the wall 7 of the building. Here, the term "approximately U-shaped" includes not only a shape consisting of approximately parallel parts and an approximately arc shape connecting them as shown in FIG. 3, but also a shape that can be said to be approximately C-shaped as shown in FIG. 2(C). When the seismic isolation member 51 is formed into an approximately U-shaped shape, the interval between the sheets (the interval in the thickness direction of the main body 3) is preferably 3 mm to 50 mm, and more preferably 5 mm to 30 mm, in a state where it is not in contact with the wall 7 of the building, in consideration of workability. In addition, the length of the seismic isolation member 51 in the lateral direction in which the main body 3 extends in a state where it is not in contact with the wall 7 of the building is preferably 10 to 200 mm. In a state where it is in contact with the wall 7 of the building, the length of the seismic isolation member 51 in the lateral direction in which the main body 3 extends is preferably 1.2 times to 2 times the length in a state where it is not in contact, in consideration of followability to earthquake shaking and ease of handling.

[0024] Any transparent resin sheet can be used as the sheet of the seismic isolation member 51, for example, vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, curable acrylic resin, epoxy resin, etc. Specific examples include, but are not limited to, glass cloth-impregnated vinyl ester, a composite of vinyl chloride resin film and glass cloth, a composite of polyester resin-coated polyethylene terephthalate resin film and acrylic resin-coated glass cloth, a composite of glass cloth and resin, a composite of polyethylene terephthalate resin film and glass cloth, and polyvinyl chloride.

[0025] Here, the characteristics of the sheets that make up the seismic isolation member 51 will be described in detail. Regarding the transparency of the sheet, when the sheet is doubled (with a gap of 10 mm between the sheets) and measured, the total light transmittance is preferably 20% or more and 100% or less. Of these, 70% or more and 100% or less is even more preferable. This ensures sufficient transparency for visual confirmation even when the seismic isolation member is composed of double sheets. The total light transmittance can be measured in accordance with JIS-K-7361.

[0026] In addition, regarding the turbidity (cloudiness) related to the transparency of the sheet, the haze value when measured under the same conditions as above is preferably 0% or more and 95% or less. Of these, it is more preferable that it is 0% or more and 20% or less. This makes it possible to ensure a sufficiently low cloudiness for visual recognition even if the seismic isolation member is composed of two sheets. The haze value can be measured with a haze meter in accordance with JIS-K-7136. Furthermore, when the sheet is doubled (with a gap of 20 mm between the sheets) and measured, the total light transmittance is preferably 20% or more and 100% or less. Of these, it is even more preferable that it is 70% or more and 100% or less. This ensures sufficient transparency for visual confirmation even when the seismic isolation member is composed of double sheets. The total light transmittance can be measured in accordance with JIS-K-7361. In addition, regarding the turbidity (cloudiness) related to the transparency of the sheet, the haze value when measured under the same conditions as above is preferably 0% or more and 95% or less. Of these, it is more preferable that it is 0% or more and 20% or less. This makes it possible to ensure a sufficiently low cloudiness for visibility even if the seismic isolation member is composed of two sheets. The haze value can be measured with a haze meter in accordance with JIS-K-7136.

[0027] Regarding the flexibility or softness of the sheet, the bending resistance as defined by JIS-L-1096 is preferably 0.5 mN or more, more preferably 2 mN or more. It is also preferably 200 mN or less, more preferably 130 mN or less, and from the viewpoint of handling, it is more preferably 30 mN or less, and even more preferably 21 mN or less. If the sheet is too soft or too hard, it is difficult to apply, and if the sheet is too hard, it will take on a shape when folded (lines will appear or the folded part will turn white; see FIG. 8). The bending resistance can be measured using a Gurley bending resistance tester.

[0028] Returning to the explanation of the seismic isolation section 5, the seismic isolation section 5 may have a frame 52 for detachably attaching the seismic isolation member 51 to the main body 3. The presence of the frame 52 makes it easy to attach and detach the seismic isolation section 5 to the main body 3, improving the ease of construction of the vertical smoke barrier wall 1. In other words, since the seismic isolation section 5 can be attached to the main body 3 after the main body 3 is fixed to the ceiling 8 with screws or the like, the work of pressing the seismic isolation member 51 against the wall 7 and deforming it can be easily carried out.

[0029] The frame 52 may be a hollow rectangular column as shown in FIG. 3, for example. The seismic isolation member 51 is fixed and integrated to the surface of the frame 52 by adhesive, screwing, clamping, or other methods. Therefore, the degree of expansion of the seismic isolation member 51 when the seismic isolation member 51 is attached to the frame 52 changes depending on the flexibility of the sheet that constitutes the seismic isolation member 51. That is, if the sheet is too hard, the seismic isolation member 51 will expand too much, and will break or whiten when bent, resulting in poor appearance, and workability when attaching the seismic isolation section 5 will deteriorate. Conversely, if the sheet is too soft, a gap will occur between the seismic isolation section 5 and the wall 7, which may cause problems with smoke-proofing performance. Therefore, the sheet is required to have an appropriate degree of stiffness and flexibility. The frame 52 can be made of the same metal material as the main frame 30, for example.

[0030] According to this embodiment, the seismic isolation section 5 has a desired flexibility, and is fixed to the main body 3 and not to the wall 7, so that it will not be damaged by the shaking of the wall 7 even during an earthquake. In addition, the seismic isolation section 5 is capable of deforming in response to the shaking of the wall 7. Therefore, the seismic isolation section 5 can abut against the wall 7 both before and after an earthquake, thereby reliably ensuring the smoke-proof function. Furthermore, the seismic isolation section 5 is transparent and does not spoil the aesthetic appearance. Moreover, since workers can see the back side through the transparent seismic isolation section 5, it is expected that the workability during construction will be improved.

[0031] Although typical embodiments of the present invention have been described above, the present invention is not limited to these, and various design modifications are possible. It goes without saying that such modified versions (variations) of the design are also included in the technical scope of the present invention. EXAMPLES

[0032] The present invention will be described in detail below with reference to examples and comparative examples. The examples are not limiting.

[0033] The following sheets 1 to 7 are prepared for the examples and comparative examples. Sheet 1: Glass cloth impregnated with vinyl ester Sheet 2: PVC film / glass cloth composite (semi-transparent) Sheet 3: Polyester resin-coated polyethylene terephthalate resin film / acrylic resin-coated glass cloth composite Sheet 4: Glass cloth / resin composite Sheet 5: Polyethylene terephthalate resin film / glass cloth composite Sheet 6: Polyvinyl chloride Sheet 7: Polyvinyl chloride (gray; opaque) Sheet 8: Polyvinyl chloride

[0034] The following tests (1) to (5) were carried out on the above sheets 1 to 5 to obtain Examples 1 to 5, and the above tests were carried out on sheets 6 and 7 to obtain Comparative Examples 1 and 2. (1) Total light transmittance measurement (2) Haze test (3) Visibility check (4) Bending test (5) Bending resistance test The above test will now be described in detail.

[0035] (1) Total light transmittance measurement and (2) Haze test Measurement samples are prepared from the above-mentioned sheets 1 to 7. That is, as shown in Fig. 4, each sheet S is attached to both sides of a hollow frame F serving as a spacer to prepare a measurement sample. Here, the thickness of the frame F is set to 10 mm.

[0036] The total light transmittance and the haze of each sample thus prepared are measured. That is, the total light transmittance and the haze of each double sheet separated by 10 mm are measured. The total light transmittance is measured in accordance with JIS-K-7361, and the haze is measured in accordance with JIS-K-7136. The device used for the measurements is a haze meter NDH4000 manufactured by Nippon Denshoku Industries Co., Ltd., and the test conditions are ASTM (illuminant C).

[0037] (3) Visibility check Confirm whether the character C (see Figure 5) displayed on the computer display D can be read through each sample under the following conditions. Character used: "a" Font: Yu Gothic Font size: 72 Bold: ON Display magnification: 100% Monitor: LCD display ProLite XU2292HS manufactured by Mouse Computer Co., Ltd. Monitor brightness: 100 Monitor contrast: 70 Interior light: ON

[0038] The confirmation results are evaluated as follows: Evaluation: Good: When the letter C is legible (see Figure 6(A)) Evaluation: △: The letter C is faintly visible but difficult to read (see Figure 6(B)). Rating "X": When the character C is illegible (see Figure 6 (C) and (D))

[0039] (4) Bending test As shown in Fig. 7, the above-mentioned sheets 1 to 7 are cut to a predetermined size to prepare test pieces SS. Here, the cut size is 25 mm in length and 60 mm in width. Next, a mark (a line or a dot) is made in the center portion in the longitudinal direction of the test piece SS. Align the center line (mark) CL of the test piece with the reference position R of the holding distance. While maintaining this state, the test piece SS is folded back so that the ends of the test piece SS are roughly overlapped, and temporarily secured in place with, for example, masking tape. On the folded test piece SS, a weight W is placed at a position a predetermined distance L away from the reference position R of the pressing distance. For example, a line may be drawn a predetermined distance L away from the reference position R of the pressing distance, and the weight W may be positioned on this line. Here, the predetermined distances are 5 mm, 10 mm, and 15 mm. The weight W is 4 kg. A weight W is placed on the folded test piece SS and the load is continued for one minute. The weight W is removed from the test piece SS, and the test piece SS is visually inspected to see if there are any changes in appearance such as cracks or whitening (e.g., symbols F1 and F2 in Figures 8(B) and (C)) (see Figure 8).

[0040] The appearance change was evaluated as follows. Evaluation: "Good": When obvious changes in appearance such as whitening or cracks are observed in the test piece SS (see Figure 8 (A)) Evaluation: "X": No obvious changes in appearance such as whitening or cracks were observed in the test piece SS (see Figures 8(B) and (C)). In addition, if the test piece SS has a crease but is transparent and not whitened, it is rated as "○".

[0041] (5) Bending resistance test For each of the above sheets, the bending resistance per test piece is measured. A Gurley tester is used for the measurement, and the standard dimensions of the test piece are 89 mm in length and 25 mm in width in accordance with JIS-L-1096. However, to obtain an appropriate value, dimensions such as 25 mm, 38 mm, and 114 mm in length, and 13 mm and 51 mm in width are combined. The bending resistance of multiple test pieces for each sheet was measured, and the average value was used as the bending resistance for evaluation. Three test pieces were used for each sheet (n=3).

[0042] The results of tests (1) to (5) performed on sheets 1 to 7 are shown in Table 1 below as Examples 1 to 5 and Comparative Examples 1 and 2.

[0043] [Table 1]

[0044] From Table 1 we can see the following: The visibility was good in Examples 1, 3, 4, and 5, and within an acceptable range in Examples 2 and 6, but was poor in Comparative Examples 1 and 2. In the bending test, Examples 1, 2, 3, and 4 and Comparative Example 1 were good, Examples 5 and 6 were within the acceptable range, and Comparative Example 2 was poor.

[0045] To summarize the above, Examples 1, 3, 4, and 5 generally had good results, and Examples 2 and 6 were within the acceptable range. In contrast, Comparative Examples 1 and 2 were unacceptable. [Explanation of symbols]

[0046] 1 Smoke-proof hanging wall 3. Main body (smoke-proof vertical wall main body) 30 Main frame 31 Top rail 32 Bottom Rail 33,34 End mullion 35 Sheet material 5. Seismic isolation section 51 Seismic isolation materials

Claims

1. A smoke barrier body attached to a ceiling of a building; A seismic isolation section attached to the smokeproof hanging wall main body or the ceiling and located on the wall side of the building relative to the smokeproof hanging wall main body; having the seismic isolation unit includes a seismic isolation member that is in contact with the wall of the building without being fixed thereto and that has transparency and flexibility; A smoke-proof vertical wall characterized by the above.

2. The seismic isolation member is formed by curving a sheet into a substantially U-shape, and a protruding portion of the substantially U-shape is brought into contact with a wall of the building. The smoke barrier according to claim 1,

3. When the sheet is doubled (10 mm apart) and measured, the total light transmittance is 20% or more and the haze value is 95% or less. The smoke barrier according to claim 2 .

4. The bending resistance of the sheet as defined in JIS-L-1096 is 200 mN or less; The smoke barrier according to claim 2 .

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