Fireproof windows

Abstract

To provide a fireproof window capable of enhancing flame-resistant performance.SOLUTION: A fireproof window 11 includes a laminated glass 12 and a window frame 13 in which the laminated glass 12 is fitted. A frame body 14 of the window frame 13 has: a first side wall 14a and a second side wall 14b which are arranged so as to face each other along a thickness direction of the laminated glass 12; an inner peripheral wall 14c which is arranged between the first side wall 14a and the second side wall 14b and arranged so as to face an outer peripheral end surface of the laminated glass 12; and an in-frame space 14d which is surrounded by the inner peripheral wall 14c, the first side wall 14a, and the second side wall 14b. The inner peripheral wall 14c of the frame body 14 has an inner peripheral wall through hole 16. Among the first side wall 14a and the second side wall 14b of the frame body 14, for example, the first side wall 14a has a first space connection portion 17 which connects the in-frame space 14d and a first space A1 where a fire breaks out by being heated by heat by the fire.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fire window. [Background technology]

[0002] As disclosed in Patent Document 1, a fire window is known that includes laminated glass and a window frame to which the laminated glass is attached. The laminated glass includes two glass panes and a resin layer disposed between the two glass panes. When the laminated glass of such a fire window is heated by a flame, the resin layer of the laminated glass melts or thermally decomposes, generating liquid or volatile matter. The liquid or volatile matter present between the two glass panes may apply unnecessary external force to the glass panes, causing them to break. Therefore, the fire window of Patent Document 1 has an exhaust hole in the window frame for exhausting the liquid or volatile matter, thereby facilitating the discharge of the liquid or volatile matter from between the two glass panes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-029104 Summary of the Invention [Problem to be solved by the invention]

[0004] In a fire window equipped with the above-mentioned laminated glass, if a fire breaks out in one of the spaces partitioned by the fire window, liquid or volatile matter produced from the resin layer of the laminated glass will escape between the two glass panes and into the space between the laminated glass and the window frame. If such liquid or volatile matter flows into the non-heated space opposite the space where the fire broke out, the liquid or volatile matter may burn in that space, thereby impairing the fire protection performance. In other words, in order to improve the flame-blocking performance of the fire window, it is important to prevent the liquid or volatile matter from flowing into the non-heated space.

[0005] An object of the present invention is to provide a fire window that enables improved flame blocking performance. [Means for solving the problem]

[0006] Various aspects of the fire window that solve the above problems will be described below. The fire window of aspect 1 is a fire window comprising: a laminated glass having two glass panes and a resin layer disposed between the two glass panes; and a window frame to which the laminated glass is attached. The window frame comprises a frame main body portion having a first side wall and a second side wall disposed to face each other along the thickness direction of the laminated glass; an inner wall disposed between the first side wall and the second side wall and facing the outer peripheral end face of the laminated glass; and a frame space portion surrounded by the inner wall, the first side wall, and the second side wall. The inner wall of the frame main body portion has an inner wall through-hole, and the first side wall or the second side wall of the frame main body portion has a space connection portion that connects the frame space portion to the space where the fire occurred when heated by the heat of a fire.

[0007] According to this configuration, when the laminated glass of the fire window is heated by the heat of a fire, liquid or volatile matter is generated from the resin layer. The liquid or volatile matter is discharged from between the first and second glass sheets into the space between the laminated glass and the window frame. The liquid or volatile matter discharged into the space between the laminated glass and the window frame is discharged into the frame interior space of the frame body through the inner peripheral wall through-holes in the inner peripheral wall of the frame body. Furthermore, the heat of the fire heats the space connection portion of the fire window, thereby connecting the frame interior space of the frame body with the heated-side space where the fire occurred. This allows the liquid or volatile matter to be discharged from the frame interior space to the heated-side space. This reduces the amount of liquid or volatile matter in the frame interior space. In other words, by discharging the liquid or volatile matter into the heated-side space, the inflow of the liquid or volatile matter into the unheated-side space can be suppressed.

[0008] In the fire window of Aspect 2, in Aspect 1, the intended spatial connection portion may have a side wall through hole penetrating the first side wall or the second side wall, and a blocking member blocking the side wall through hole, and the blocking member may have at least one of a fitting portion that fits into an inner circumferential surface of the side wall through hole or a peripheral portion of the side wall through hole, and a joint portion that joins to the inner circumferential surface of the side wall through hole or a peripheral portion of the side wall through hole. For example, by making the fitting portion or the joint portion a portion that melts preferentially in the frame body, the blocking member can be easily removed from the side wall through hole by the heat of a fire.

[0009] In the fire window of Aspect 3, in Aspect 2, the melting point of at least a part of the closing member may be 700°C or less. With this configuration, the space within the frame and the space on the heated side where a fire has occurred can be quickly connected.

[0010] In the fire window of aspect 4, in aspect 1, the intended spatial connection portion comprises a side wall through hole that penetrates the first side wall or the second side wall, a metal plate member arranged along the first side wall or the second side wall so as to overlap with the side wall through hole, and a plurality of metal fixing portions that fix the metal plate member to the first side wall or the second side wall, and the plurality of metal fixing portions are arranged at a distance from each other in the longitudinal direction of the frame main body portion, and the side wall through hole may be arranged between the plurality of metal fixing portions.

[0011] The metal plate member expands due to heat during a fire. At this time, the metal plate member is fixed to the first or second side wall by the multiple metal fixing parts as described above. Therefore, the metal plate member between the multiple metal fixing parts deforms so as to become convex outward (toward the space where the fire occurred), and moves away from the first or second side wall. This allows a gap to be formed between the side wall through hole and the metal plate member. Meanwhile, during normal use of the fire window, the side wall through hole is concealed by the metal plate member arranged so as to overlap the side wall through hole. Therefore, the side wall through hole is not visible from the outside, ensuring the design of the fire window.

[0012] In the fire window of Aspect 5, in Aspect 4, the first side wall or the second side wall on which the metal plate member is disposed may have an outer peripheral side wall portion located outer than the side wall through-hole, and the outer peripheral side wall portion may protrude outward beyond the metal plate member. With this configuration, liquid or volatile matter can be discharged from between the outer peripheral side wall portion and the metal plate member into the space where a fire has occurred. This makes it possible to increase the speed at which liquid or volatile matter is discharged from the frame space into the space where a fire has occurred.

[0013] In the fire window of Aspect 6, in any one of Aspects 1 to 5, the space connection portion may include a first space connection portion provided in the first side wall and a second space connection portion provided in the second side wall. With this configuration, even if either of the spaces separated by the fire window becomes the heated space, it is possible to prevent liquid or volatile matter from flowing into the non-heated space.

[0014] In the fire window of Aspect 7, in Aspect 6, the first space-connecting portion may have a first side-wall through-hole penetrating the first side wall, and the second space-connecting portion may have a second side-wall through-hole penetrating the second side wall, and the first side-wall through-hole of the first space-connecting portion and the second side-wall through-hole of the second space-connecting portion may be positioned so as not to overlap with each other in the thickness direction of the window frame. With this configuration, for example, if a fire breaks out in the space on the side of the first space-connecting portion and the first space-connecting portion connects the heated-side space and the frame space through the first space-connecting portion, heat transfer around the second side-wall through-hole of the second space-connecting portion can be suppressed. This can prevent the second space-connecting portion from being connected to the unheated-side space. Furthermore, for example, if a fire breaks out in the space on the side of the second space-connecting portion and the second space-connecting portion connects the heated-side space and the frame space through the second space-connecting portion, heat transfer around the first side-wall through-hole of the first space-connecting portion can be suppressed. This can prevent the first space connection portion from being connected to the space on the non-heated side.

[0015] In the fire window of Aspect 8, in any one of Aspects 1 to 7, the window frame may include a lower frame, an upper frame, and a pair of vertical frames connecting both longitudinal ends of the lower frame to both longitudinal ends of the upper frame, and the lower frame may include the frame main body. With this configuration, liquid in the frame space in the frame main body of the lower frame can be discharged to the heated side space, thereby preventing liquid from flowing into the unheated side space. [Effects of the Invention]

[0016] According to the present invention, it is possible to improve the flame blocking performance of a fire window. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a front view of a fire window according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. [Figure 3] 1(a) and 1(b) are partial cross-sectional views showing a window frame. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. [Figure 5] FIG. 10 is a partial cross-sectional view illustrating the function of a fire window in the event of a fire. [Figure 6] 10(a) and 10(b) are partial cross-sectional views showing modified examples of fire windows. [Figure 7] FIG. 10 is a cross-sectional view of a fire window according to a second embodiment. [Figure 8] FIG. 1 is a cross-sectional view of a fire window. [Figure 9] FIG. 1 is a cross-sectional view illustrating the function of a fire window in the event of a fire. [Figure 10] FIG. 10 is a partial cross-sectional view illustrating the function of a fire window in the event of a fire. [Figure 11] FIG. 10 is a cross-sectional view of a fire window according to a third embodiment. [Figure 12] FIG. 10 is a partial cross-sectional view illustrating the function of a fire window in the event of a fire. [Figure 13]FIG. 10 is a partial cross-sectional view illustrating the operation of the modified fire window. DETAILED DESCRIPTION OF THE INVENTION

[0018] (First embodiment) A first embodiment of the fire window will be described below with reference to the drawings. Note that for the sake of convenience, the drawings may show some components exaggerated or simplified. Furthermore, the dimensional proportions of each part may differ from the actual proportions.

[0019] As shown in FIGS. 1 and 2, a fire window 11 of this embodiment includes a laminated glass 12 and a window frame 13 to which the laminated glass 12 is attached. <Laminated Glass 12> 2, the laminated glass 12 of the fire window 11 includes a first glass sheet 12a, a second glass sheet 12b, and a resin layer 12c disposed between the two glass sheets 12a and 12b. The laminated glass 12 has a first main surface S1 facing the first glass sheet 12a and a second main surface S2 facing the second glass sheet 12b.

[0020] The first glass sheet 12a and the second glass sheet 12b are, for example, fire-resistant glass that meets the fire resistance requirements for specific fire prevention equipment. Examples of the first glass sheet 12a and the second glass sheet 12b include heat-resistant crystallized glass, borosilicate glass, and soda-lime glass. The first glass sheet 12a and the second glass sheet 12b may be the same type and may be different in thickness.

[0021] The resin layer 12c is disposed so as to be sandwiched between the first glass sheet 12a and the second glass sheet 12b. The resin layer 12c is bonded to the first glass sheet 12a and the second glass sheet 12b. The resin layer 12c prevents glass fragments from scattering when at least one of the first glass sheet 12a and the second glass sheet 12b is broken. Examples of resins that may be used to form the resin layer 12c include thermoplastic resins such as ionomer resins, vinyl acetate resins, vinyl chloride resins, ethylene-vinyl acetate copolymers, fluororesins, polyvinyl butyral resins, and polyvinyl alcohol resins. The resin layer 12c may have a single-layer structure or a laminate structure composed of multiple resin layers.

[0022] The laminated glass 12 of this embodiment has a rectangular shape when viewed from the front, but the shape of the laminated glass 12 may be a polygon other than a quadrilateral, or may be an oval or a circle. <Window Frame 13> As shown in FIG. 1, the window frame 13 has an overall shape that follows the outer periphery of the laminated glass 12. The overall shape of the window frame 13 in this embodiment is a rectangular frame. More specifically, the window frame 13 has a lower frame 13a, an upper frame 13b, and a pair of vertical frames 13c that connect both longitudinal ends of the lower frame 13a to both longitudinal ends of the upper frame 13b. The lower frame 13a, the upper frame 13b, and the vertical frames 13c may be integrally molded products, or may be joined products in which the respective frames are joined together.

[0023] As shown in Figure 2, the window frame 13 has a frame main body portion 14 arranged along the outer peripheral end surface of the laminated glass 12, and a support portion 15 arranged to face the second main surface S2 of the laminated glass 12.

[0024] The frame body 14 of the window frame 13 has a first side wall 14a and a second side wall 14b that are arranged to face each other along the thickness direction of the laminated glass 12. The frame body 14 has an inner peripheral wall 14c that is arranged between the first side wall 14a and the second side wall 14b. The inner peripheral wall 14c is arranged to face the outer peripheral end face of the laminated glass 12.

[0025] The frame body 14 has an inner space 14d surrounded by an inner peripheral wall 14c and the first and second side walls 14a and 14b. The frame body 14 of this embodiment has an outer peripheral wall 14e disposed opposite the inner peripheral wall 14c.

[0026] The inner peripheral wall 14c of the frame main body 14 has an inner peripheral wall through-hole 16. The inner peripheral wall through-hole 16 may be provided partially in the circumferential direction of the inner peripheral wall 14c, or may be provided so as to extend over the entire circumferential direction of the inner peripheral wall 14c.

[0027] The first side wall 14a of the frame main body 14 has a first space connection intended portion 17 that, when heated by the heat of a fire, connects the frame space 14d to the first space A1, which is the space where the fire occurred.

[0028] 3(a) and 3(b), the first intended spatial connection portion 17 has a first sidewall through-hole 17a penetrating the first sidewall 14a and a first closing member 17b closing the first sidewall through-hole 17a. The first closing member 17b has a shaft portion P1 inserted into the first sidewall through-hole 17a and a fitting portion P2 fitting around the periphery of the first sidewall through-hole 17a. By making at least a portion of the first closing member 17b from a material with a low melting point within the frame main body 14, the first closing member 17b can be removed from the first sidewall through-hole 17a by the heat of a fire.

[0029] It is preferable that the melting point of at least a part of the first closing member 17b is 700°C or lower. In this case, it is possible to quickly connect the frame space portion 14d and the first space A1, which is the heated-side space where a fire has occurred. It is preferable that the melting point of at least a part of the first closing member 17b is 400°C or higher. In this case, for example, when a fire breaks out in the second space A2, the first sidewall through-hole 17a is likely to remain closed.

[0030] As shown in FIG. 2, the second side wall 14b of the frame main body 14 has a second space connection portion 18 that, when heated by the heat of a fire, connects the frame interior space 14d with the second space A2, where the fire occurred. The second space connection portion 18 has a second side wall through-hole 18a that penetrates the second side wall 14b and a second closing member 18b that closes the second side wall through-hole 18a. The second closing member 18b can be configured similarly to the first closing member 17b, which has an axial portion P1 and a fitting portion P2. By configuring at least a portion of the second closing member 18b from a material with a low melting point within the frame main body 14, the second closing member 18b can be removed from the second side wall through-hole 18a by the heat of the fire.

[0031] It is preferable that the melting point of at least a part of the second closing member 18b is 700°C or lower. In this case, the intra-frame space 14d can be quickly connected to the second space A2, which is the heated-side space where a fire has occurred. It is preferable that the melting point of at least a part of the second closing member 18b is 400°C or higher. In this case, for example, when a fire breaks out in the first space A1, the second sidewall through-hole 18a is likely to remain closed.

[0032] At least a portion of the first closing member 17b and at least a portion of the second closing member 18b may be made of, for example, a resin material, zinc, aluminum, etc. In addition, in the frame main body 14, portions other than the first closing member 17b and the second closing member 18b may be made of, for example, steel, stainless steel, etc.

[0033] 4, the first side wall through-hole 17a of the first intended space-connecting portion 17 and the second side wall through-hole 18a of the second intended space-connecting portion 18 are arranged at positions where they do not overlap with each other in the thickness direction of the window frame 13. The number of first intended space-connecting portions 17 may be one or more. The number of second intended space-connecting portions 18 may be one or more.

[0034] <Installation structure of laminated glass 12> 1 and 2, the fire window 11 includes a flange 19 arranged to face the first main surface S1 of the laminated glass 12, and a mounting member 20 for mounting the flange 19 to the window frame 13. The flange 19 is arranged to extend along the lower frame 13a, the upper frame 13b, and a pair of vertical frames 13c. The mounting member 20 may be a screw that threads into the frame main body 14 as in this embodiment, or, for example, a rivet that is joined to the frame main body 14.

[0035] The fire window 11 may include various components as needed for purposes such as positioning, cushioning, and sealing the laminated glass 12. More specifically, as shown in Figures 1 and 2, the fire window 11 of this embodiment includes a setting block 21 that supports the laminated glass 12. For example, multiple setting blocks 21 can be arranged so as to partially support the lower edge of the laminated glass 12 along the longitudinal direction. The setting block 21 can be made of, for example, a rubber material.

[0036] As shown in Fig. 2, the fire window 11 of this embodiment includes a backup material 22 and a sealing material 23 that are arranged between the support portion 15 of the window frame 13 and the laminated glass 12. The fire window 11 also includes the backup material 22 and the sealing material 23 that are arranged between the ledge 19 and the laminated glass 12. The sealing material 23 is arranged so as to fill the inside of the backup material 22 when viewed from the front of the laminated glass 12. The backup material 22 is made of, for example, a resin foam. An example of the sealing material 23 is a silicone-based sealing material.

[0037] <Fire window 11 usage status> 2 and 4, the fire window 11 is disposed so as to separate the first space A1 from the second space A2. In this embodiment, a case where a fire breaks out in the first space A1 will be described as an example, but the same effect can be obtained when a fire breaks out in the second space A2.

[0038] First, the state of the laminated glass 12 when a fire breaks out will be described. 5, when the laminated glass 12 of the fire window 11 is heated by the flame FL in the first space A1, a liquid substance 24 or volatile matter is generated from the resin layer 12c. The liquid substance 24 or volatile matter is discharged from between the first glass sheet 12a and the second glass sheet 12b into the space between the laminated glass 12 and the window frame 13. The liquid substance or volatile matter discharged into the space between the laminated glass 12 and the window frame 13 is discharged into the frame inner space 14d of the frame main body 14 through the inner peripheral wall through-hole 16 in the inner peripheral wall 14c of the frame main body 14.

[0039] For example, the liquid material 24 flows down from between the first glass sheet 12a and the second glass sheet 12b toward the frame space 14d in the frame main body 14 of the lower frame 13a, and is discharged into the frame space 14d in the lower frame 13a.

[0040] If the amount of liquid material 24 or volatile matter in the frame space 14d of the frame main body 14 increases, the liquid material 24 or volatile matter is more likely to flow from the space between the laminated glass 12 and the frame main body 14 around the outer periphery of the laminated glass 12. The liquid material 24 or volatile matter that flows in this manner is more likely to be discharged into both the first space A1 and the second space A2.

[0041] Next, the state of the fire window 11 when a fire occurs will be described. The flame FL in the first space A1 heats the intended first-space connection portion 17 of the fire window 11, thereby connecting the frame space 14d and the first space A1 where the fire occurred. Specifically, as shown in FIGS. 2 and 5, the first closing member 17b is heated and removed from the first sidewall through-hole 17a. This allows the frame space 14d and the first space A1 to be connected via the first sidewall through-hole 17a. This allows the liquid material 24 or volatile matter to be discharged from the frame space 14d to the first space A1. This reduces the amount of liquid material 24 or volatile matter in the frame space 14d. In other words, discharging the liquid material 24 or volatile matter into the first space A1 prevents the liquid material 24 or volatile matter from flowing into the second space A2.

[0042] Next, the operation and effects of the first embodiment will be described. (1-1) A fire window 11 includes a laminated glass 12 and a window frame 13 to which the laminated glass 12 is attached. A frame main body 14 of the window frame 13 has a first side wall 14a and a second side wall 14b that are arranged to face each other along the thickness direction of the laminated glass 12. The frame main body 14 has an inner peripheral wall 14c that is arranged between the first side wall 14a and the second side wall 14b and faces the outer peripheral end face of the laminated glass 12. The frame main body 14 has an inner-frame space 14d that is surrounded by the inner peripheral wall 14c and the first and second side walls 14a and 14b. The inner peripheral wall 14c of the frame main body 14 has an inner-wall through-hole 16. Of the first side wall 14a and the second side wall 14b of the frame main body 14, for example, the first side wall 14a has a first space connection intended portion 17 that, when heated by the heat of a fire, connects the frame space portion 14d to the first space A1 where the fire occurred.

[0043] With this configuration, as described above, the flame FL in the first space A1 heats the intended first-space connection portion 17 of the fire window 11, connecting the frame space 14d to the first space A1 where the fire has occurred. This allows the liquid material 24 or volatile matter to be discharged from the frame space 14d to the first space A1. This prevents the liquid material 24 or volatile matter from flowing into the second space A2, which is the unheated space. This improves the flame-blocking performance of the fire window 11.

[0044] (1-2) The frame body 14 of the fire window 11 has a first space connection planned portion 17 on the first side wall 14a and a second space connection planned portion 18 on the second side wall 14b. In this case, even if either the first space A1 or the second space A2 partitioned by the fire window 11 becomes the heated space, the inflow of liquid matter 24 or volatile matter into the non-heated space can be prevented. Therefore, the spread of fire to both spaces partitioned by the fire window 11 can be prevented.

[0045] (1-3) In the fire window 11, the first side-wall through-hole 17a of the intended first-space connection portion 17 and the second side-wall through-hole 18a of the intended second-space connection portion 18 are arranged at positions that do not overlap with each other in the thickness direction of the window frame 13. With this configuration, if a fire breaks out in the first space A1 and the first space A1 is connected to the frame-interior space 14d by the intended first-space connection portion 17, heat transfer to the periphery of the second side-wall through-hole 18a of the intended second-space connection portion 18 can be suppressed. This can prevent the intended second-space connection portion 18 from being connected to the second space A2, which is the non-heated space. Furthermore, for example, if a fire breaks out in the second space A2 and the intended second-space connection portion 18 connects the second space A2 to the frame-interior space 14d, heat transfer to the periphery of the first side-wall through-hole 17a of the intended first-space connection portion 17 can be suppressed. This makes it possible to prevent the intended first space connection portion 17 from being connected to the first space A1, which is the space on the non-heated side.

[0046] (1-4) In the fire window 11, for example, the first space-connecting portion 17 has a first sidewall through-hole 17a penetrating the first sidewall 14a and a first closing member 17b closing the first sidewall through-hole 17a. The first closing member 17b has a fitting portion P2 that fits into the periphery of the first sidewall through-hole 17a. In this case, by making the fitting portion P2 of the first closing member 17b a portion of the frame body 14 that melts preferentially, the first closing member 17b can be easily removed from the first sidewall through-hole 17a by the heat of a fire. In this embodiment, the second space-connecting portion 18 can also achieve the same effect as the first space-connecting portion 17.

[0047] (1-5) In the fire window 11, for example, it is preferable that the melting point of at least a part of the first closing member 17b is 700°C or less. In this case, the frame space 14d can be quickly connected to the first space A1, which is the space on the heated side where a fire has occurred. If the melting point of at least a part of the second closing member 18b is also 700°C or less, the frame space 14d can be quickly connected to the second space A2, which is the space on the heated side where a fire has occurred.

[0048] (1-6) In the fire window 11, the window frame 13 has a lower frame 13a, an upper frame 13b, and a pair of vertical frames 13c. The lower frame 13a of the window frame 13 has a frame body 14. In this case, the liquid material 24 in the frame space 14d of the frame body 14 of the lower frame 13a can be discharged to the heated-side space. This prevents the liquid material 24 from flowing into the unheated-side space. Therefore, by preventing the spread of fire caused by the liquid material 24, the flame-blocking performance of the fire window 11 can be improved.

[0049] <Modification of the first embodiment> The first embodiment can be modified as follows: The first embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0050] In the frame main body 14 of the window frame 13, the fitting portion P2 of the first closing member 17b of the first intended space-connecting portion 17 may be omitted, and the axis portion P1 may be changed to a fitting portion that fits into the inner circumferential surface of the first side wall through-hole 17a. Note that the second intended space-connecting portion 18 may also be changed in the same way as the first intended space-connecting portion 17.

[0051] In the frame main body 14 of the window frame 13, the first closing member 17b of the first intended spatial connection portion 17 can also be attached to the first sidewall through-hole 17a by screw fitting. For example, as shown in FIG. 6(a), a threaded portion can be formed on the inner circumferential surface of the first sidewall through-hole 17a, and the shaft portion P1 of the first closing member 17b can be changed to a screw shaft P3. The second intended spatial connection portion 18 can also be changed in the same way as the first intended spatial connection portion 17.

[0052] In the frame main body portion 14 of the window frame 13, the first blocking member 17b of the first space connection intended portion 17 can also be attached to the inner surface of the first side wall through hole 17a or the peripheral portion of the first side wall through hole 17a by a joint such as an adhesive layer, a rivet joint, or a welded joint.

[0053] For example, as shown in Fig. 6(b), the first closing member 17b is changed to a first closing member 17b having a closing portion P4 and a joining portion P5 that joins the closing portion P4 to the peripheral portion of the first side-wall through-hole 17a. This first closing member 17b may be provided on the inner surface of the first side wall 14a of the frame main body 14, or may be provided on the outer surface of the first side wall 14a as shown by the two-dot chain line in Fig. 6(b). Note that the second intended spatial connection portion 18 can also be changed in the same way as the first intended spatial connection portion 17.

[0054] In the fire window 11, the first space connection planned portion 17 and the second space connection planned portion 18 can also be arranged in positions where they overlap each other in the thickness direction of the window frame 13. In the fire window 11, it is also possible to omit one of the first space connection portion 17 and the second space connection portion 18. In this case, if a fire breaks out in the space on the space connection portion side of the two spaces separated by the fire window 11, it is possible to prevent the fire from spreading to the space on the opposite side of the space connection portion side.

[0055] (Second embodiment) The second embodiment of the fire window will be described, focusing on the differences from the first embodiment. As shown in FIGS. 7 and 8, in the second embodiment, the first space-connecting planned portion 17 and the second space-connecting planned portion 18 of the first embodiment are modified as follows.

[0056] The first space-connecting portion 27 in the fire window 11 of the second embodiment includes a first sidewall through-hole 27a that penetrates the first sidewall 14a, and a first metal plate member 27b that is arranged along the first sidewall 14a so as to overlap with the first sidewall through-hole 27a. The first space-connecting portion 27 also includes a pair of first metal fixing portions 27c that fix the first metal plate member 27b to the first sidewall 14a.

[0057] The pair of first metal fixing portions 27c are arranged spaced apart in the longitudinal direction of the frame main body portion 14. The first sidewall through-hole 27a is arranged between the pair of first metal fixing portions 27c. The second space-connecting portion 28 in the fire window 11 of the second embodiment includes a second sidewall through-hole 28a that penetrates the second sidewall 14b and a second metal plate member 28b that is arranged along the second sidewall 14b so as to overlap with the second sidewall through-hole 28a. The second space-connecting portion 28 also includes a pair of second metal fixing portions 28c that fix the second metal plate member 28b to the second sidewall 14b.

[0058] The pair of second metal fixing portions 28c are spaced apart in the longitudinal direction of the frame main body 14. The second sidewall through-hole 28a is located between the pair of second metal fixing portions 28c. Examples of metals for the first metal plate member 27b and the second metal plate member 28b include steel, stainless steel, aluminum, zinc, magnesium, etc. The thickness of the first metal plate member 27b and the second metal plate member 28b is preferably within a range of 0.2 mm to 5 mm, and more preferably within a range of 0.5 mm to 2 mm.

[0059] In this embodiment, the first metal fixing portion 27c and the second metal fixing portion 28c are screws. Examples of metals for the first metal fixing portion 27c and the second metal fixing portion 28c include steel, stainless steel, and brass.

[0060] Next, the use of the fire window 11 of the second embodiment will be described. During normal use of the fire window 11, the first side wall through-hole 27a is concealed by the first metal plate member 27b, which is arranged so as to overlap the first side wall through-hole 27a. Therefore, the first side wall through-hole 27a is not visible from the outside, ensuring the design of the fire window 11. During normal use of the fire window 11, the second side wall through-hole 28a is also not visible from the outside, ensuring the design of the fire window 11.

[0061] As shown in FIGS. 9 and 10 , if a fire breaks out in the first space A1, the first metal plate member 27b of the intended first-space connection portion 27 thermally expands. At this time, the first metal plate member 27b is fixed to the first side wall 14a by the plurality of first metal fixing portions 27c as described above. Therefore, the first metal plate member 27b between the plurality of first metal fixing portions 27c deforms outward (toward the first space A1), and as shown in FIG. 10 , the first metal plate member 27b moves away from the first side wall 14a. This creates a gap between the first side-wall through-hole 27a and the first metal plate member 27b. Therefore, the frame space portion 14d and the first space A1 can be connected by the first side-wall through-hole 27a. Therefore, as in the first embodiment, the inflow of the liquid material 24 or volatile matter into the second space A2 can be suppressed. Even if a fire breaks out in the second space A2, the intended second-space connection portion 28 provides the same effect.

[0062] Next, the operation and effects of the second embodiment will be described. (2-1) In the second embodiment, the actions and effects described in sections (1-1), (1-2), and (1-6) of the first embodiment can also be obtained.

[0063] (2-2) In the fire window 11, for example, the first space-connecting portion 27 includes a first sidewall through-hole 27a penetrating the first sidewall 14a and a first metal plate member 27b arranged along the first sidewall 14a so as to overlap the first sidewall through-hole 27a. The first space-connecting portion 27 also includes a pair of first metal fixing portions 27c that fix the first metal plate member 27b to the first sidewall 14a. In this case, as described above, in the event of a fire, for example, a gap can be formed between the first sidewall through-hole 27a and the first metal plate member 27b. This can prevent the inflow of the liquid material 24 or volatile matter into the second space A2, which is the non-heated space. During normal use of the fire window 11, for example, the first sidewall through-hole 27a is concealed by the first metal plate member 27b arranged so as to overlap the first sidewall through-hole 27a. Therefore, the first side wall through-hole 27a is not visible from the outside, and the design of the fire window 11 can be ensured.

[0064] (2-3) In the fire window 11, the first side-wall through-hole 27a of the intended first-space connection portion 27 and the second side-wall through-hole 28a of the intended second-space connection portion 28 are arranged at positions where they do not overlap with each other in the thickness direction of the window frame 13. With this configuration, when a fire breaks out in the first space A1 and the first space A1 and the intra-frame space portion 14d are connected by the first side-wall through-hole 27a of the intended first-space connection portion 27, it is possible to prevent heat from being transferred to the periphery of the second side-wall through-hole 28a of the intended second-space connection portion 28. This makes it possible to prevent the second side-wall through-hole 28a of the intended second-space connection portion 28 from being connected to the second space A2, which is the space on the non-heated side. Furthermore, for example, if a fire breaks out in the second space A2 and the second space A2 and the intra-frame space 14d are connected by the second side-wall through-hole 28a of the intended second space connection portion 28, it is possible to prevent heat from being transferred to the periphery of the first side-wall through-hole 27a of the intended first space connection portion 27. This makes it possible to prevent the first side-wall through-hole 27a of the intended first space connection portion 27 from being connected to the first space A1, which is the space on the non-heated side.

[0065] (Third embodiment) The third embodiment of the fire window will be described, focusing on the differences from the second embodiment. As shown in FIG. 11 , in the fire window 11 of the third embodiment, the first sidewall 14a, on which the first metal plate member 27b is disposed, has a first outer peripheral sidewall portion W1 located on the outer peripheral side of the first sidewall through-hole 27a. The first outer peripheral sidewall portion W1 of the first sidewall 14a protrudes outward from the first metal plate member 27b. In this embodiment, the first outer peripheral sidewall portion W1 protrudes downward from the lower end of the first metal plate member 27b. The protruding length L1 of the first outer peripheral sidewall portion W1 is preferably 2 mm or more, more preferably 4 mm or more, and even more preferably 5 mm or more. The upper limit of the protruding length L1 is not particularly limited, but is, for example, 300 mm or less.

[0066] In the fire window 11 of the third embodiment, the second side wall 14b on which the second metal plate member 28b is disposed has a second outer peripheral side wall portion W2 located on the outer peripheral side of the first side wall through-hole 27a. The second outer peripheral side wall portion W2 of the second side wall 14b protrudes outward from the second metal plate member 28b. In this embodiment, the second outer peripheral side wall portion W2 protrudes downward from the lower end of the second metal plate member 28b. The protruding length L2 of the second outer peripheral side wall portion W2 is preferably 2 mm or more, more preferably 4 mm or more, and even more preferably 5 mm or more. The upper limit of the protruding length L2 is not particularly limited, but is, for example, 300 mm or less.

[0067] The frame main body 14 has an outer peripheral wall 14e disposed opposite the inner peripheral wall 14c. In the outer peripheral wall 14e of the frame main body 14, the inner surface B1 facing the inner peripheral wall 14c is positioned closer to the first side-wall through-hole 27a than the first outer peripheral end face E1 of the first outer peripheral sidewall W1. In the outer peripheral wall 14e of the frame main body 14, the inner surface B1 facing the inner peripheral wall 14c is positioned closer to the second side-wall through-hole 28a than the second outer peripheral end face E2 of the second outer peripheral sidewall W2.

[0068] Next, the use of the fire window 11 of the third embodiment will be described. As shown in Figures 11 and 12, the fire window 11 is attached to a window frame attachment portion 26. As shown in Figure 12, if a fire breaks out in the first space A1, a gap can be formed between the first side wall through-hole 27a and the first metal plate member 27b, as in the second embodiment. This makes it possible to prevent the inflow of liquid material 24 or volatile matter into the second space A2, which is the non-heated side space. Furthermore, if a fire breaks out in the second space A2, a gap can be formed between the second side wall through-hole 28a and the second metal plate member 28b.

[0069] The fire window 11 of the third embodiment includes a first outer peripheral wall W1 that protrudes outward beyond the first metal plate member 27b. This allows the liquid material 24 or volatile matter to be discharged into the first space A1 from between the first outer peripheral wall W1 and the first metal plate member 27b. This increases the speed at which the liquid material 24 or volatile matter is discharged from the frame space 14d into the first space A1. In the event of a fire in the second space A2, the second outer peripheral wall W2 that protrudes outward beyond the second metal plate member 28b provides a similar effect.

[0070] Next, the operation and effects of the third embodiment will be described. (3-1) In the third embodiment, the actions and effects described in sections (2-1) to (2-3) of the second embodiment can also be obtained.

[0071] (3-2) The fire window 11 has a first outer peripheral side wall W1 that protrudes outward beyond the first metal plate member 27b. In this case, if a fire breaks out in the first space A1, it is possible to increase the speed at which the liquid material 24 or volatile matter is discharged from the frame space 14d into the first space A1. This can further improve the flame-blocking performance of the fire window 11.

[0072] (3-3) For example, the inner surface B1 of the outer peripheral wall 14e of the frame main body 14 is disposed closer to the first side-wall through-hole 27a than the first outer peripheral end face E1 of the first outer peripheral side-wall W1. In this case, the inner surface of the frame space 14d is raised by the outer peripheral wall 14e, which can promote the discharge of the liquid material 24 from the first side-wall through-hole 27a or the second side-wall through-hole 28a.

[0073] <Modifications of the second and third embodiments> The second and third embodiments can be modified as follows: The second and third embodiments and the following modifications can be combined and implemented within the scope of technical compatibility.

[0074] In the first spatial connection portion 27, one first metal plate member 27b is fixed by a pair of first metal fixing portions 27c, but it may also be fixed by three or more first metal fixing portions 27c. Similarly, in the second spatial connection portion 28, one second metal plate member 28b may also be fixed by three or more second metal fixing portions 28c.

[0075] The first metal fixing portion 27c and the second metal fixing portion 28c are not limited to a structure in which they are fixed by fastening members such as screws and rivets, but may also be formed by welding, for example. The number of first side wall through holes 27a arranged between the plurality of first metal fixing portions 27c in the first intended spatial connection portion 27 may be one or more. Similarly, the number of second side wall through holes 28a arranged between the plurality of second metal fixing portions 28c in the second intended spatial connection portion 28 may be one or more.

[0076] In the fire window 11, the first side wall through hole 27a of the first space connection portion 27 and the second side wall through hole 28a of the second space connection portion 28 can also be positioned so that they overlap each other in the thickness direction of the window frame 13.

[0077] In the fire window 11, it is also possible to omit one of the first space connection portion 27 and the second space connection portion 28. In this case, if a fire breaks out in the space on the space connection portion side of the two spaces separated by the fire window 11, it is possible to prevent the fire from spreading to the space on the opposite side of the space connection portion side.

[0078] The inner surface B1 of the outer peripheral wall 14e of the frame main body 14 may be located closer to the first outer peripheral end surface E1 of the first outer peripheral sidewall portion W1 than the first sidewall through-hole 27a. The inner surface B1 of the outer peripheral wall 14e of the frame main body 14 may be located closer to the second outer peripheral end surface E2 of the second outer peripheral sidewall portion W2 than the second sidewall through-hole 28a.

[0079] <Modifications common to the first to third embodiments> The first to third embodiments can be modified as follows: The first to third embodiments and the following modifications can be combined with each other within the scope of technical compatibility.

[0080] The outer peripheral wall 14e of the frame main body 14 in the window frame 13 may be omitted. Also, for example, as shown in FIG. 13, the outer peripheral wall 14e of the frame main body 14 may have an outer peripheral wall through-hole 25. By attaching such a window frame 13 to a window frame mounting portion 26, the outer peripheral wall through-hole 25 in the outer peripheral wall 14e may be blocked. In this case, if the amount of liquid material 24 or volatile matter in the frame intraspace 14d of the frame main body 14 increases, there is a higher possibility that the liquid material 24 or volatile matter will be discharged into both the first space A1 and the second space A2. Therefore, it is effective to suppress the spread of fire by discharging the liquid material 24 or volatile matter in the frame intraspace 14d, for example, through the first sidewall through-hole 17a into the first space A1, which is the heated-side space.

[0081] The frame body 14 of the fire window 11 can be applied to at least one of the lower frame 13a, upper frame 13b, and vertical frame 13c. The frame body 14 of the fire window 11 can also be applied to at least one of the pair of vertical frames 13c. When the frame body 14 is applied to the upper frame 13b or the vertical frame 13c, volatile matter is discharged into the heated space, thereby preventing volatile matter from flowing into the unheated space.

[0082] The window frame 13 of the fire window 11 has a support portion 15, but this support portion 15 may be omitted and modified as follows: The fire window 11 can be modified to include a first flange, which is the flange 19 of the above embodiment, and a second flange arranged to face the second main surface S2 of the laminated glass 12.

[0083] The laminated glass 12 has a three-layer structure consisting of a first glass sheet 12a, a second glass sheet 12b, and a resin layer 12c, but may have a five-layer or more structure consisting of three or more glass sheets and two or more resin layers. For example, the laminated glass may have a five-layer structure in which a first glass sheet, a first resin layer, a second glass sheet, a second resin layer, and a third glass sheet are laminated in this order.

[0084] The fire window 11 can also be used with the first and second main surfaces S1, S2 of the laminated glass 12 inclined relative to the vertical direction. Even in this case, the lower frame 13a of the window frame 13 is provided with the frame body 14, thereby achieving the effects described in section (1-6) above.

[0085] The fire window 11 can also be used in a state in which the first main surface S1 and the second main surface S2 of the laminated glass 12 are horizontal planes that are perpendicular to the vertical direction. [Explanation of symbols]

[0086] 11...Fire window 12...Laminated glass 12a...First glass pane 12b...Second glass pane 12c…Resin layer 13...Window frame 13a…Bottom frame 13b…Top frame 13c…Vertical frame 14...Frame body 14a...First side wall 14b…Second side wall 14c…Inner peripheral wall 14d...Space within the frame 16...Inner peripheral wall through hole 17, 27...1st Space Connection Planned Section 17a, 27a...1st side wall through hole 17b...first closing member 18, 28... Planned connection to the second space 18a, 28a...Second side wall through hole 18b...second blocking member 27b...First metal plate member 27c...First metal fixing part 28b...Second metal plate member 28c…Second metal fixing part A1…first space A2…Second space P2: Fitting part P5…Joint part W1: First outer peripheral wall W2: Second outer peripheral wall

Claims

1. A fire window comprising a laminated glass having two glass sheets and a resin layer disposed between the two glass sheets, and a window frame to which the laminated glass is attached, The window frame includes a frame body portion, The frame main body includes a first side wall and a second side wall arranged to face each other along a thickness direction of the laminated glass, an inner peripheral wall disposed between the first side wall and the second side wall and facing an outer peripheral end surface of the laminated glass; a frame space surrounded by the inner peripheral wall, the first side wall, and the second side wall, The inner peripheral wall of the frame main body portion has an inner peripheral wall through-hole, A fire window having a space connection portion in which the first side wall or the second side wall of the frame main body portion is heated by the heat of a fire, connecting the frame space portion to the space where the fire occurred.

2. The space connection planned portion includes a side wall through-hole penetrating the first side wall or the second side wall, a closing member that closes the side wall through-hole, 2. A fire window as described in claim 1, wherein the blocking member has at least one of a fitting portion that fits into the inner surface of the side wall through hole or the peripheral portion of the side wall through hole, and a joining portion that joins to the inner surface of the side wall through hole or the peripheral portion of the side wall through hole.

3. 3. The fire window according to claim 2, wherein the melting point of at least a portion of the closure member is 700°C or less.

4. The space connection planned portion includes a side wall through-hole penetrating the first side wall or the second side wall, a metal plate member disposed along the first side wall or the second side wall so as to overlap with the side wall through-hole; a plurality of metal fixing portions that fix the metal plate member to the first side wall or the second side wall, The fire window according to claim 1 , wherein the plurality of metal fixing portions are spaced apart in the longitudinal direction of the frame body portion, and the side wall through hole is disposed between the plurality of metal fixing portions.

5. the first side wall or the second side wall on which the metal plate member is disposed has an outer peripheral side wall portion located on the outer peripheral side of the side wall through hole, The fire window according to claim 4 , wherein the outer peripheral side wall portion protrudes outward beyond the metal plate member.

6. 6. A fire window according to claim 1, wherein the space connection portion includes a first space connection portion provided in the first side wall and a second space connection portion provided in the second side wall.

7. the first space-connection intended portion has a first sidewall through-hole penetrating the first sidewall, the second space connection portion has a second side wall through-hole penetrating through the second side wall, The fire window according to claim 6, wherein the first side wall through hole of the first space connection portion and the second side wall through hole of the second space connection portion are positioned so as not to overlap each other in the thickness direction of the window frame.

8. The window frame includes a lower frame, an upper frame, and a pair of vertical frames connecting both longitudinal ends of the lower frame and both longitudinal ends of the upper frame, respectively; The fire window according to claim 1 , wherein the lower frame comprises the frame main body portion.

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