Smoke curtain

Abstract

The present invention provides a smoke barrier that is less susceptible to damage at the connection points with building walls during an earthquake, ensures smoke protection before and after an earthquake, and offers good workability without compromising aesthetics. [Solution] A smoke barrier comprising a smoke barrier body attached to the ceiling of a building, and a seismic isolation section attached to the smoke barrier body or the ceiling and located closer to the building wall than the smoke barrier body, wherein the seismic isolation section includes a flexible sheet, a pair of fixing members fixed to opposing edges of the sheet and capable of holding the sheet in a substantially U-shape, and a connecting member connecting the pair of fixing members.

Description

【Technical Field】 【0001】 The present invention relates to a smoke-proof curtain wall. 【Background Art】 【0002】 A smoke-proof curtain wall is installed in the ceiling part of a building such as a building for the purpose of preventing the spread of smoke during a fire and ensuring an evacuation time. However, when the smoke-proof curtain wall is fixed to the wall, there is a concern that the connection part between the smoke-proof curtain wall and the wall may be damaged due to the movement of the wall accompanying the shaking of an earthquake. 【0003】 Regarding such a problem, for example, in Patent Document 1 (Utility Model Registration No. 3175735), it is provided at both left and right ends of a partition smoke-proof curtain wall, and a soft plate-shaped buffer member is fitted through a fitting member in an outer opening of a hanging bolt decorative cover formed in an H-shaped cross-sectional shape or a substantially H-shaped cross-sectional shape. In addition, in Patent Document 2 (Utility Model Registration No. 3172946), the upper rail of the smoke-proof curtain wall is stopped at a position about 50 to 100 mm in front of the wall and column to prevent the generation of compressive stress occurring at the contact point with the wall and column during an earthquake. Also, for the purpose of preventing the movement of smoke within the compartment and suppressing secondary disasters due to breakage and damage of glass during an earthquake, between the wall and column, a calcium silicate plate (which serves to absorb the displacement stress between the wall / column and the glass and does not transmit it to the glass) and a non-combustible sheet seismic wall surface upright (which serves to absorb damage to members due to shaking during in-plane displacement and absorb some out-of-plane displacement) are attached to form a structure. 【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】 [Problems that the invention aims to solve] 【0005】 By the way, in conventional smoke barriers, in order to manufacture the buffer member (or seismic isolation wall surface mullion made of non-combustible sheet), opposing edges of a flexible sheet material are attached to opposing surfaces of a fitting member (or calcium silicate board). For example, one edge of the sheet material constituting the buffer member is attached to the surface with the fitting member using double-sided tape or the like, causing the sheet material to curve into a U-shape. Then, while maintaining the curved state of the sheet material, the other edge of the sheet material is attached to the opposing surface of the fitting member using double-sided tape or the like. During the bonding process of these sheet materials, the sheets attached to the fitting members often twist or wrinkle, impairing their appearance. In other words, the workability during the manufacturing process is difficult, and this can be one of the factors that worsens the yield of seismic isolation components. Thus, the smoke barriers disclosed in the above-mentioned Patent Documents 1 and 2 still have issues in terms of workability and maintaining aesthetics. 【0006】 Therefore, the present invention aims to provide a smoke barrier that is less susceptible to damage at the connection point with the building wall when an earthquake occurs, can ensure smoke barrier function before and after an earthquake, and is easy to work with and does not impair aesthetics. [Means for solving the problem] 【0007】 To achieve this objective, the present invention The smoke barrier curtain body attached to the ceiling of the building, The system includes the smoke barrier body or the ceiling, and a seismic isolation unit located closer to the building wall than the smoke barrier body, The aforementioned seismic isolation section, A flexible sheet, A pair of fixing members are fixed to the opposing edges of the sheet and capable of holding the sheet in a substantially U-shape, A connecting member that connects the pair of fixing members, The present invention provides a smoke-proof curtain wall characterized by including [the following]. Here, "building" conceptually includes structural elements such as columns, and is not limited in any way to any object on which smoke barriers can be installed. 【0008】 In the smoke barrier curtain of the present invention having such a configuration, when manufacturing the seismic isolation section, a pair of fixing members are attached to the opposing edges of a flat sheet, and the pair of fixing members are joined together, allowing the sheet to be easily curved into a roughly U-shape. Therefore, it is easy to work with, and twisting and wrinkles are less likely to occur in the sheet. Consequently, even when using a transparent sheet that is prone to twisting and wrinkles, the appearance and visibility can be maintained well. In addition, for example, a pair of fixing members can be attached to a flat sheet and then packaged and transported to the site in a flat state, thus reducing damage to the sheet during transport and making transportation easier. At the site, the seismic isolation section can be easily assembled by joining the pair of fixing members. Furthermore, the seismic isolation section (especially the sheet) can be easily cut at the site while it is laid flat. 【0009】 In the smoke-proof curtain of the present invention, it is preferable that the pair of fixing members are joined together to form an insert, the joining member is a recess that receives the pair of fixing members, and the joining of the pair of fixing members is by inserting the pair of fixing members into the joining member. 【0010】 According to the smoke barrier of the present invention having such a configuration, since the pair of fixing members are inserted into the connecting member in a connected state, the installation work of the seismic isolation section is simplified, and the number of additional parts such as screws required for the installation of the seismic isolation section can be reduced. 【0011】 More specifically, the connecting member may have an edge that accepts the insertion of the pair of fixing members, and the connection of the pair of fixing members may involve sliding the pair of fixing members away from the edge of the connecting member. 【0012】 Therefore, the seismic isolation section can be attached simply by sliding a pair of fixing members from the edges of the connecting member, making the installation process easy. 【0013】 In addition, in the smoke-proof curtain wall of the present invention, it is preferable that the sheet has transparency, and when the sheet is double-layered (interval 10 mm), the total light transmittance is 20% or more, or the haze value is 95% or less. 【0014】 According to the smoke-proof curtain wall of the present invention having such a configuration, even if the seismic isolation member is composed of a double sheet, sufficient transparency or cloudiness for visual recognition can be ensured. 【Advantages of the Invention】 【0015】 According to the present invention, when manufacturing the seismic isolation part, by attaching a pair of fixing members to the opposing edge sides of the flat sheet and joining the pair of fixing members, the sheet can be easily bent into a substantially U shape. Therefore, the workability is good, and twisting and wrinkles are unlikely to occur in the sheet. Therefore, even when a transparent sheet that is prone to noticeable twisting and wrinkles is adopted, the appearance and visibility can be maintained well. In addition, for example, in a state where a pair of fixing members are attached to a flat sheet, it can be packed flat and transported to the site, so damage to the sheet or the like due to transportation can be suppressed, and transportation becomes easy. At the site, the seismic isolation part can be easily assembled by joining a pair of fixing members. Also, it is easy to cut the seismic isolation part (especially the sheet) in a flat state at the site. 【Brief Description of the Drawings】 【0016】 [Figure 1] It is a front view, a cross-sectional view, and a longitudinal sectional view schematically showing a smoke-proof curtain wall 1 according to a typical embodiment of the present invention. [Figure 2] It is a left side view, a front view, a right side view, a bottom view, and a perspective view of the seismic isolation part 5. [Figure 3] It is a left side view, a front view, a right side view, a bottom view, and a perspective view showing the combined, curved sheet 51 and fixing members 52, 53. [Figure 4] It is a front view, a bottom view, a right side view, and a perspective view showing the combined, flat sheet 51 and fixing members 52, 53. [Figure 5] It is a diagram showing an example of the assembly procedure of the sheet 51 and the fixing members 52 and 53. [Figure 6] It is a diagram showing an example of the procedure of attaching the curved sheet 51 and the fixing members 52 and 53 to the coupling member 54. [Figure 7] It is a front view and a side view of the frame F used for checking the transmission of the sheet sample SS. [Figure 8] It is a diagram showing an example of the characters used for checking the transmission of the sheet sample SS. [Figure 9] It is a diagram showing an example of the determination criteria for checking the transmission of the sheet sample SS. [Figure 10] It is a diagram showing the test method for the bending evaluation of the sheet sample SS. [Figure 11] It is a diagram showing an example of the determination criteria for the bending evaluation of the sheet sample SS. 【Mode for Carrying Out the Invention】 【0017】 Hereinafter, referring to the drawings, typical embodiments of the smoke-proof curtain according to the present invention will be described in detail. However, the present invention is not limited to what is shown in the drawings. Also, since each drawing is for conceptually explaining the present invention, the size, length ratio, and quantity may be exaggerated or simplified as necessary for easy understanding. Furthermore, in the following description, the same or corresponding parts may be denoted by the same reference numerals, and duplicate descriptions may be omitted. 【0018】 The smoke-proof curtain 1 is attached so as to extend vertically downward in a substantially vertical direction to the ceiling 8 of a building or the like, and prevents the flow and diffusion of smoke during a fire. Here, the building includes a structure such as a pillar. As shown in FIG. 1, the smoke-proof curtain 1 includes a main body (smoke-proof curtain main body) 3 and a seismic isolation part 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 non-combustible sheet material 35 attached to the main body frame 30. 【0020】 In this embodiment, a panel type is used as the main frame 30. Specifically, the main frame 30 includes an upper rail 31 fixed to the ceiling 8, a lower rail 32 facing the upper rail 31, and end mullions 33 and 34 connecting the ends of the upper rail 31 and the lower rail 32. The upper rail 31, the lower rail 32, and either or both of the end mullions 33 and 34 may be provided with recesses or receiving portions (not shown) for attaching the seismic isolation unit 5. The lower rail 32 also supports the seismic isolation unit 5 from below to prevent it from falling off the end mullions 33 and 34. The main frame 30 may also be of the tension type. Furthermore, the main frame 30 may be configured to allow adjustment of its length in the vertical (up and down) and horizontal directions. 【0021】 As the sheet material 35, sheet materials with high transparency (light transmission) or low transparency (light transmission) can be used. Furthermore, it is preferable to use a sheet material with high installation transparency (light transmission) so as not to impair the design of the wall surface or obstruct the spread of lighting when installing the seismic-resistant member. In the case of a transparent resin sheet, any material can be used, but for example, vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, curable acrylic resin, epoxy resin, etc. can be used. 【0022】 Next, I will explain the seismic isolation section 5. For example, as shown in Figures 1(A) and (B), the seismic isolation unit 5 is located closer to the building wall than the main body 3. In other words, the seismic isolation unit 5 is interposed between the main body 3 and the building wall 7. 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. If it is attached to the ceiling 8, the seismic isolation unit 5 is installed without any gap between the building wall 7 and the main body 3. Also, the seismic isolation unit 5 abuts against or contacts the building wall 7, but it is not fixed to the wall 7. The seismic isolation unit 5 can also be provided on one side of the main body 3, but in order to further suppress damage during an earthquake, it is preferable to provide the seismic isolation unit 5 on both sides of the main body 3. 【0023】 The seismic isolation section 5 includes a flexible sheet 51. Specifically, the sheet 51 is formed by curving a sheet material into a roughly U-shape, with the roughly U-shaped protrusion in contact with the building wall 7. It is preferable that the sheet 51 be transparent. Here, "approximately U-shaped" includes not only shapes consisting of, for example, approximately parallel parts and approximately arc-shaped connecting parts, but also shapes that can be described as approximately C-shaped. When the sheets 51 are formed in an approximately U-shape, the spacing between sheets (spacing in the thickness direction of the main body 3) is preferably 3 mm to 50 mm, and more preferably 5 mm to 30 mm, when the sheet is not in contact with the building wall 7, considering ease of construction. Also, when the sheet is not in contact with the building wall 7, the length of the sheet 51 in the lateral direction to which the main body 3 extends is preferably 10 to 200 mm. When the sheet is in contact with the building wall 7, the length of the sheet 51 in the lateral direction to which the main body 3 extends is preferably 1.2 times to 2 times the length when the sheet is not in contact with the wall, taking into account the ability to follow seismic shaking and ease of handling. 【0024】 Any flexible and preferably transparent resin sheet can be used as the sheet 51, but examples include vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, curable acrylic resin, epoxy resin, etc. Specifically, examples include, but are not limited to, glass cloth-impregnated vinyl ester, composite of vinyl chloride resin film and glass cloth, composite of polyester resin-coated polyethylene terephthalate resin film and acrylic resin-coated glass cloth, glass cloth and resin composite, polyethylene terephthalate resin film and glass cloth composite, and polyvinyl chloride. 【0025】 Here, we will explain in detail the characteristics of the sheets that make up sheet 51. Regarding the transparency of sheet 51, it is preferable that the total light transmittance when sheet 51 is doubled (with a 10 mm gap between sheets) is 20% or more and 100% or less. More preferably, it is 70% or more and 100% or less. This ensures sufficient transparency for visibility even when sheet 51 is composed of two layers of sheets. The total light transmittance can be measured in accordance with JIS-K-7361. 【0026】 Furthermore, regarding the turbidity (haze) related to the transparency of sheet 51, it is preferable that the haze value measured under the same conditions as above be between 0% and 95%. More preferably, it is between 0% and 20%. This ensures that even if sheet 51 is composed of two layers of sheets, a sufficiently low haze level for visibility can be maintained. The haze value can be measured with a haze meter in accordance with JIS-K-7136. 【0027】 Furthermore, regarding the flexibility or pliability of sheet 51, it is preferable that the rigidity / softness as defined in JIS-L-1096 be 0.5 mN or more, and more preferably 2 mN or more. It is also preferable that it be 200 mN or less, more preferably 130 mN or less, and from the viewpoint of handling, more preferably 30 mN or less, and even more preferably 21 mN or less. If sheet 51 is too soft or too hard, it will be difficult to work with, and if the sheet is too hard, it will bend and develop a shape (lines will appear or whitening will occur in the bent part). The rigidity / softness can be measured with a Gahl rigidity / softness tester. 【0028】 Returning to the description of the seismic isolation section 5, the seismic isolation section 5 has a pair of fixing members 52 and 53 that are fixed to the opposing edges of the sheet 51 (see Figures 3 and 4). The fixing members 52 and 53 can hold the sheet 51 in a substantially U-shape and, when joined together, form an insert (see Figures 5 and 6). As for the means of fixing the sheet 51 to the pair of fixing members 52 and 53, examples include adhesive fixing with an adhesive agent and adhesive fixing with an adhesive. Adhesion, which exhibits a certain fixing force simply by applying pressure, is preferred from the viewpoint of workability, and in the embodiments of the present invention described later, a double-sided tape having adhesive layers on both sides will be used. 【0029】 The fixing members 52 and 53 may be roughly U-shaped, roughly C-shaped, or hollow rectangular prisms. As will be described in detail later, the sheet 51 is fixed to the surface of the fixing members 52 and 53 by adhesive or other methods and integrated, and then the sheet 51 is bent by bringing the fixing members 52 and 53 closer together. Therefore, the degree of curvature of the sheet 51 changes depending on the flexibility of the sheet 51. That is, if the sheet 51 is too hard, the sheet 51 will spread out too much, and may bend or whiten when bent, resulting in an unsightly appearance and poor workability when installing the seismic isolation unit 5. Conversely, if the sheet 51 is too soft, a gap will be created between the seismic isolation unit 5 and the wall 7, which may cause problems with smoke prevention performance. For this reason, the sheet 51 is required to have an appropriate degree of rigidity and flexibility. The fixing members 52 and 53 can be made from the same metal material as the main frame 30, for example. 【0030】 Furthermore, the seismic isolation section 5 has a connecting member 54 that connects the fixing members 52 and 53 (see Figure 2). The connecting member 54 also serves as a connection point to the main body 3. The connecting member 54 can be made of the same metal material as the main body frame 30, for example. 【0031】 Specifically, the connecting member 54 may include a recess 54A for receiving the fixing members 52 and 53 (see Figures 6(A) and (B)). The recess 54A may be, for example, a roughly U-shaped or roughly C-shaped member. The recess 54A may also have an edge 54B that accepts the insertion of the fixing members 52 and 53. The edge 54B may also be called the insertion opening for the fixing members 52 and 53. A projection 54C may be formed on the inner surface of the recess 54A to restrict the attached fixing members 52 and 53 from coming off laterally from the smoke barrier curtain 1. In the illustrated example, the projection 54C is formed continuously along the direction in which the recess 54A is formed, but the projection 54C may be formed partially or discontinuously. 【0032】 Furthermore, the inner dimensions (especially the width) of the recess 54A may be approximately the same as or slightly larger than the sum of the widths of the fixing members 52 and 53. Due to the restoring force of the curved sheet 51, a force acts on the fixing members 52 and 53 in a direction away from each other. Therefore, the fixing members 52 and 53 are pressed against the inner surface of the recess 54A, and their movement within the recess 54A (especially vertical movement) is suppressed. This prevents the fixing members 52 and 53 from falling out of the recess 54A. Consequently, no additional parts such as adhesives or screws are required to fix the fixing members 52 and 53 to the connecting member 54. Moreover, by attaching the lower rail 32, the lower rail 32 supports the fixing members 52 and 53 from below, ensuring that the fixing members 52 and 53 do not fall. 【0033】 This makes it easier to attach and detach the seismic isolation section 5 to the main body 3, improving the workability of the smoke barrier curtain wall 1. In other words, since the seismic isolation section 5 can be attached to the main body 3 after the main body 3 has been fixed to the ceiling 8 with screws or the like, the work of pressing and deforming the sheet 51 against the wall 7 can be easily carried out. 【0034】 Next, an example of the assembly procedure for the seismic isolation unit 5 will be described. First, prepare the fixing members 52 and 53, and place the sheet 51 on a flat surface (such as a workbench or floor) (see Figures 5(A) and (B)). Fixing members 52 and 53 are fixed to opposing edges 51A and 51B of the sheet 51, respectively (see Figures 5(B) and (C)). Any fixing means can be used, such as double-sided tape or adhesive. In the illustrated example, fixing members 52 and 53 are adhered to the same surface of the sheet 51, but fixing members 52 and 53 may be adhered to different surfaces of the sheet 51. 【0035】 When this work is carried out in a factory or similar facility, the integrated sheet 51 and fixing members 52 and 53 can be packaged flat and transported to the site, making transportation easy. At the site, the seismic isolation section 5 can be easily assembled using the method described later. Furthermore, the seismic isolation section 5 (especially the sheet 51) can be easily cut at the site while it is laid flat. In contrast, conventional methods, such as transporting curved sheets to the site, can result in damage due to vibration or compression. Furthermore, cutting the seismic isolation section is not easy with curved sheets, and there is a risk of damaging the sheets. 【0036】 Then, by joining the fixing members 52 and 53, the sheet 51 is curved into a roughly U-shape. In other words, the bending of the sheet 51 is performed separately from the process of attaching the sheet 51 to the fixing members 52 and 53. 【0037】 Here, the connection of the fixing members 52 and 53 is achieved by placing the fixing members 52 and 53 opposite each other and bringing them closer together or into contact (see Figures 5(D) to (F)). The connection of the fixing members 52 and 53 can be achieved by inserting the fixing members 52 and 53 into the connecting member 54, or for example, by sliding the fixing members 52 and 53 from the edge 54B of the connecting member 54 (see Figures 6(A) to (C)). 【0038】 Furthermore, the curvature of the sheet 51 can be either when a fixing member 52 (and / or 53) is interposed between the edges 51A and 51B of the sheet 51 (not shown), or when the edges 51A and 51B of the sheet 51 face each other (see Figure 3). Either method is acceptable. However, the latter is preferable from the viewpoint of suppressing damage to the sheet 51 during the subsequent attachment process to the connecting member 54 (see Figure 6). 【0039】 The fastening members 52 and 53 can be easily joined on-site, and the sheet 51 is less likely to twist or wrinkle. Therefore, even when a transparent sheet 51 is used, it is easy to ensure the appearance and visibility of the sheet 51. Furthermore, since the fixing members 52 and 53 are inserted into the connecting member in a connected state, screws or the like are not required for attaching the seismic isolation section 5. 【0040】 Sheet 51 may be transparent. When sheet 51 is measured in double layers (10 mm apart), the total light transmittance is 20% or more and / or the haze value is 95% or less, so that even if sheet 51 is composed of double layers, sufficient transparency and / or cloudiness for visibility can be ensured. 【0041】 According to this embodiment, the seismic isolation section 5 has the desired flexibility and is fixed to the main body 3 rather than to the wall 7, so it is not damaged by the shaking of the wall 7 even during an earthquake. Furthermore, the seismic isolation section 5 is capable of deforming in accordance with the shaking of the wall 7. Therefore, the seismic isolation section 5 can contact the wall 7 before and after an earthquake, thereby reliably ensuring the smoke-proof function. Furthermore, the transparency of the seismic isolation section 5 does not detract from the aesthetics. Moreover, since workers can see the back side through the transparent seismic isolation section 5, improved work efficiency during construction can be expected. 【0042】 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 embodiments (variations) are also included within the technical scope of the present invention. [Examples] 【0043】 The sheet relating to the present invention will be described in detail below with reference to examples and comparative examples. However, the present invention is not limited to the examples. 【0044】 Prepare the following sheets 1 to 8 for the examples and comparative examples. Sheet 1: Glass cloth impregnated vinyl ester Sheet 2: Composite of polyvinyl chloride resin film / glass cloth (semi-transparent) Sheet 3: Composite of polyester resin-coated polyethylene terephthalate resin film / acrylic resin-coated glass cloth Sheet 4: Glass cloth / resin composite Sheet 5: Composite of polyethylene terephthalate resin film / glass cloth Sheet 6: Polyvinyl chloride Sheet 7: Polyvinyl chloride (gray; opaque) Sheet 8: Polyvinyl chloride 【0045】 The following tests (1) to (5) were performed on sheets 1 to 6 to create Examples 1 to 6, and the above tests were performed on sheets 7 and 8 to create Comparative Examples 1 and 2. (1) Total light transmittance measurement (2) Haze test (3) Check visibility (4) Bending test (5) Stiffness test The details of the above test are explained below. 【0046】 (1) Measurement of total light transmittance and (2) Haze test A sample for measurement is prepared using the sheets 1 to 7 described above. Specifically, as shown in Figure 7, each sheet S is attached to both sides of a hollow frame F that serves as a spacer to create the sample for measurement. Here, the thickness of the frame F is set to 10 mm. 【0047】 For each prepared sample, the total light transmittance and haze will be measured. In other words, the total light transmittance and haze will be measured for two sheets spaced 10 mm apart. Total light transmittance was measured according to JIS-K-7361, and haze measurement was performed according to JIS-K-7136. The instrument used for measurement was the NDH4000 haze meter manufactured by Nippon Denshoku Industries Ltd., and the test conditions were ASTM (C light source). 【0048】 (3) Check visibility The following conditions will be used to verify whether the character C (see Figure 8) displayed on the computer display D can be read through each sample. Character used: "あ" Font: Yu Gothic Font size: 72 Bold: ON Display magnification: 100% Monitor: ProLite XU2292HS LCD display manufactured by Mouse Computer Co., Ltd. Monitor brightness: 100 Monitor contrast: 70 Interior light: ON 【0049】 The verification results are evaluated as follows: Rating "〇": When the letter C is legible (see Figure 9(A)) Rating "△": The letter C is faintly visible but difficult to decipher (see Figure 9(B)). Evaluation "×": When the letter C is illegible (see Figures 9(C) and (D)). 【0050】 (4) Bending test As shown in Figure 10, sheets 1 to 7 are cut to the specified size to form test specimens SS. Here, the cut size is 25 mm in length and 60 mm in width. Next, a mark (line or dot) is made in the center of the longitudinal direction of the test specimen SS. Align the center line (mark) CL of the test specimen with the reference position R for the clamping distance. While maintaining that state, fold the test piece SS so that the ends of the test piece SS roughly overlap, and temporarily secure it with, for example, masking tape. On the folded test specimen SS, a weight W is placed at a predetermined distance L from the reference position R for the pressing distance. For example, a line may be drawn at a predetermined distance L from the reference position R for the pressing distance, and the position of the weight W may be aligned with this line. Here, the predetermined distances are 5 mm, 10 mm, and 15 mm. The weight W is 4 kg. After placing the weight W on the folded test specimen SS, the load is maintained for 1 minute. Remove the weight W from the specimen SS and visually inspect the specimen SS for any changes in appearance such as cracking or whitening (e.g., F1 and F2 in Figures 11(B) and (C)) (see Figure 11). 【0051】 The evaluation of the changes in appearance is as follows: Evaluation "〇": When obvious changes in appearance such as whitening or cracking are observed in the test specimen SS (see Figure 11(A)). Evaluation "×": No obvious changes in appearance such as whitening or cracking are observed in the test specimen SS (see Figures 11(B) and (C)). If the test specimen SS has a crease but is transparent and does not whiten, it will be evaluated as "○". 【0052】 (5) Stiffness test For each of the above sheets, the stiffness and softness of one test specimen will be measured. A Gahl-type testing machine will be used for measurement, and the standard dimensions of the test specimen will be 89 mm in length and 25 mm in width, in accordance with JIS-L-1096. However, to obtain appropriate values, dimensions such as 25 mm, 38 mm, 114 mm in length and 13 mm, 51 mm in width will be combined. The stiffness and flexibility of multiple test specimens were measured for each sheet, and the average value was used as the evaluation stiffness and flexibility. In this study, three test specimens were used for each sheet (n=3). 【0053】 Table 1 below shows the results of tests (1) to (5) conducted on sheets 1 to 8, as Examples 1 to 6 and Comparative Examples 1 and 2. 【0054】 [Table 1] 【0055】 From Table 1, the following can be seen: Visibility was good in Examples 1, 3, 4, and 5, and within acceptable limits in Examples 2 and 6, but poor in Comparative Examples 1 and 2. The bending test was good in Examples 1, 2, 3, 4, and 5 and Comparative Example 1, and within the acceptable range in Example 6, but poor in Comparative Example 2. 【0056】 In summary, Examples 1, 3, 4, and 5 yielded generally good results, while Examples 2 and 6 were within acceptable limits. In contrast, Comparative Examples 1 and 2 were unacceptable. [Explanation of Symbols] 【0057】 1 Smoke-proof hanging wall 3. Main body (smoke barrier curtain main body) 30 Main frame 31 Upper rail 32 Lower rail 33,34 End mullion 35 Sheet material 5. Seismic isolation section 51 sheets 52, 53 Fixing members 54 Connecting member

Claims

[Claim 1] The smoke barrier curtain body attached to the ceiling of the building, The system includes the smoke barrier body or the ceiling, and a seismic isolation unit located closer to the building wall than the smoke barrier body, The aforementioned seismic isolation section, A flexible sheet, A pair of fixing members are fixed to the opposing edges of the sheet, respectively, and capable of holding the sheet in a substantially U-shape. A connecting member that connects the pair of fixing members, A smoke barrier characterized by including [the following]. [Claim 2] The pair of fixing members are joined together to form an insert, The connecting member is a recess that receives the pair of fixing members, The connection of the pair of fixing members is by inserting the pair of fixing members into the connecting member. A smoke barrier curtain according to claim 1, characterized by the above. [Claim 3] The connecting member has an edge that accepts the insertion of the pair of fixing members, The connection of the pair of fixing members is to slide the pair of fixing members away from the edges of the connecting member. A smoke barrier curtain according to claim 1, characterized by the above. [Claim 4] The aforementioned sheet is transparent, When the aforementioned sheet is doubled (with a 10 mm gap) and measured, the total light transmittance is 20% or more, or the haze value is 95% or less. A smoke barrier curtain according to claim 1, characterized by the above.

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