Building materials

Abstract

To provide a fitting including a triple-glazed glass and improved in fire protection performance.SOLUTION: A fitting 1 includes: a frame 2 or stile body 30; a triple-glazed glass arranged in the frame 2 or the stile body 30, and having an outdoor side glass 35a, an indoor side glass 35b spaced apart from the outdoor side glass 35a and arranged at the indoor side, and an intermediate glass 35c arranged between the outdoor side glass 35a and the indoor side glass 35b; and a heated foam material 315 arranged between the frame 2 or the stile body 30 and an edge of the triple-glazed glass, wherein the heated foam material 315 is arranged at a position facing and straddling at least an edge of the intermediate glass 35c and an edge of either the outdoor side glass 35a and the indoor side glass 35b.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a double-glazing glass body in which three or more layers of glass are arranged via spacers, and to a fixture equipped with this double-glazing glass body. [Background technology]

[0002] There are fire-resistant building materials with improved fire resistance, and the majority of them use double-glazed glass. However, in recent years, the use of triple-glazed glass has been increasing in order to further reduce CO2 emissions from homes and to achieve a more comfortable thermal environment (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-161605 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to provide a building material that is equipped with triple glazing and has improved fire resistance. [Means for solving the problem]

[0005] The present disclosure relates to a building fixture comprising a frame or frame body, a triple glazing comprising an exterior glass pane arranged on the frame or frame body, an interior glass pane arranged on the interior side with a gap from the exterior glass pane, and an intermediate glass pane arranged between the exterior glass pane and the interior glass pane, and a heat-foaming material arranged between the frame or frame body and an edge of the triple glazing, wherein the heat-foaming material is arranged in a position opposite to and spanning at least the edge of the intermediate glass pane and the edge of either the exterior glass pane or the interior glass pane. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a front view of a sliding window as a fixture according to a first embodiment, viewed from the inside of the room. [Figure 2] FIG. 2 is a longitudinal cross-sectional view taken along line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 4] This is a cross-sectional view showing the vertical frame part on the door end side of the inner shoji screen of a sliding window as a fixture in the second embodiment. [Figure 5] This is a cross-sectional view showing the vertical frame part on the door end side of the inner shoji screen of a sliding window as a fixture in the third embodiment. [Figure 6] This is a cross-sectional view showing the vertical frame part on the door end side of the inner shoji screen of a sliding window as a fixture in the fourth embodiment. [Figure 7] FIG. 10 is a vertical cross-sectional view showing the upper frame of a sliding window screen as a fixture according to the fifth embodiment. [Figure 8] FIG. 10 is a vertical cross-sectional view showing the bottom frame of a sliding door screen as a fixture according to the fifth embodiment. [Figure 9] FIG. 10 is a cross-sectional view showing the right-hand vertical frame of a sliding window screen as a fixture according to the fifth embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing the left vertical frame of a sliding window screen as a fixture according to the fifth embodiment. [Figure 11] FIG. 10 is a cross-sectional view showing the right-hand vertical frame of a sliding window screen as a fixture according to the sixth embodiment. [Figure 12] FIG. 11 is a cross-sectional view showing the right-hand vertical frame of a sliding window screen as a fixture according to the seventh embodiment. [Figure 13] FIG. 13 is a cross-sectional view showing the right-hand vertical frame of a sliding window screen as a fixture according to the eighth embodiment. [Figure 14] FIG. 13 is a vertical cross-sectional view showing the upper frame of a sliding screen window as a fixture according to the ninth embodiment. [Figure 15] FIG. 13 is a vertical cross-sectional view showing the bottom frame of a sliding window screen as a fixture according to the ninth embodiment. [Figure 16]A cross-sectional view showing the vertical frame on the right side of the shoji screen of a sliding window as a fixture in the ninth embodiment. [Figure 17] This is a cross-sectional view showing the left vertical frame of a sliding window screen as a fixture in the tenth embodiment. [Figure 18] This is a cross-sectional view showing the vertical frame on the right side of the shoji screen of a sliding window as a fixture in the 11th embodiment. [Figure 19] This is a cross-sectional view showing the vertical frame on the right side of the shoji screen of a sliding window as a fixture in the twelfth embodiment. [Figure 20] A vertical cross-sectional view showing the upper frame portion of a FIX window as a fixture of the thirteenth embodiment. [Figure 21] A vertical cross-sectional view showing the lower frame portion of a fixed window as a fixture of the thirteenth embodiment. [Figure 22] This is a cross-sectional view showing the right-hand vertical frame portion of a fixed window as a fixture of the thirteenth embodiment. [Figure 23] This is a cross-sectional view showing the right-hand vertical frame portion of a shoji screen of a fixed window as a fixture of the 14th embodiment. [Figure 24] This is a cross-sectional view showing the right-hand vertical frame portion of a shoji screen of a fixed window as a fixture of the 15th embodiment. [Figure 25] This is a cross-sectional view showing the right-hand vertical frame portion of a shoji screen of a fixed window as a fixture of the 16th embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] A first embodiment of the present disclosure will be described in detail below with reference to the drawings. In this specification, the term "visible direction" refers to the surface direction of the face materials 35, 45 of a sliding window 1 installed in an opening formed in a wall of a building, and the term "visible direction" refers to the thickness direction (i.e., the depth direction) of the face materials 35, 45. The "visible direction" also refers to the indoor / outdoor direction. The "visible surface" refers to the surface of the sliding window 1 facing the outdoor side and the indoor side, and the "visible surface" refers to the surface of the sliding window 1 extending in the indoor / outdoor direction. In the drawings, the outdoor side of the sliding window 1 is referred to as the outdoor side X1, and the indoor side of the sliding window 1 is referred to as the indoor side X2.

[0008] As shown in Figures 1 to 3, the sliding window 1 that constitutes the building fixture is constructed by fitting two shoji screens, an outer shoji screen 3 placed on the outside X1 and an inner shoji screen 4 placed on the inside X2, inside a frame 2 that is attached to an opening in the building's main body (not shown).

[0009] The frame body 2 is formed by framing an upper frame 21, a lower frame 22, and a pair of left and right vertical frames 23, 24 in a rectangular shape. As shown in Figure 2, the upper frame 21 is provided with an outdoor rail 211 and an indoor rail 212. The upper frame 21 has a screen rail 213 on the outdoor side X1 of the outdoor rail 211. The lower frame 22 is provided with an outdoor rail 221 and an indoor rail 222. The lower frame 22 has a screen rail 223 on the outdoor side X1 of the outdoor rail 221.

[0010] As shown in Figure 2, the upper frame 21 has a composite structure in which resin cover materials 215, 216 are attached to the inner surface of a metal frame 214, which is the frame body and is divided into an outdoor side and an indoor side. This provides excellent thermal insulation and moisture resistance. The metal frame 214 is divided into an outdoor metal frame 2141 and an indoor metal frame 2142 between the outdoor rail 211 and the indoor rail 212. The outdoor metal frame 2141 and the indoor metal frame 2142 are connected by a resin connecting material 2143.

[0011] The resin cover material 215 is disposed between the outdoor rail 211 and the indoor rail 212 of the upper frame 21. The resin cover material 216 is configured to include the indoor side X2 portion of the indoor rail 212 of the upper frame 21, and is provided from the indoor side of the indoor rail 212 to the inner surface of the metal frame 214. The resin cover material 216 has an angle portion 2161 that protrudes toward the indoor side X2 beyond the indoor side end 214a of the metal frame 214. The resin cover material 215 is provided above the outer shoji screen 3, which is disposed in the position shown in Figure 1. The resin cover material 216 is provided above the inner shoji screen 4, over the entire length of the upper frame 21 in the direction in which it extends.

[0012] As shown in Figure 2, the lower frame 22 has a composite structure in which resin cover materials 226, 227 are attached to the inner surface of the metal frame 224, which is the frame body and is divided into an outdoor side and an indoor side. This provides excellent thermal insulation and moisture resistance. The metal frame 224 is divided into an outdoor metal frame 2241 and an indoor metal frame 2242 between the outdoor rail 221 and the indoor rail 222. The outdoor metal frame 2241 and the indoor metal frame 2242 are connected by a resin connecting material 2243.

[0013] The resin cover material 226 is disposed between the outdoor rail 221 and the indoor rail 222 on the lower frame 22. Specifically, the resin cover material 226 is disposed on the inner surface of the outdoor metal frame body 2241, closer to the outdoor side X1 than the resin connecting material 2243. The resin cover material 227 is disposed on the indoor side X2 than the indoor rail 222 on the lower frame 22. The resin cover material 226 is provided below the outer shoji screen 3, which is disposed in the position shown in Figure 1. The resin cover material 227 is provided below the inner shoji screen 4, over the entire length of the lower frame 22 in the extension direction.

[0014] As shown in Figure 3, the vertical frame 23 arranged on the door edge side of the outer shoji screen 3 has a metal frame body 231 which is the frame body main body. The vertical frame 24 arranged on the door edge side of the inner shoji screen 4 has a metal frame body 241 which is the frame body main body.

[0015] As shown in Figures 1 to 3, the outer shoji screen 3 is constructed by fitting a rectangular triple-pane panel 35 made of three panes of glass inside a rectangular frame 30 consisting of an upper frame 31, a lower frame 32, a vertical frame 33 located at the door end, and an outer frame 34, which is a vertical frame located at the door end. The panel 35 has an exterior pane 35a made of insulating glass, an interior pane 35b also made of insulating glass and positioned on the interior side with a gap from the exterior pane 35a, and an intermediate pane 35c made of heat-resistant tempered glass and positioned between the exterior pane 35a and the interior pane 35b. The combination of these three panes of glass is similar to that of the other embodiments described below.

[0016] Spacers 35d are disposed between the exterior glass 35a and the middle glass 35c, and between the interior glass 35b and the middle glass 35c. The end faces of the triple-glazed panel 35 are held in place by grating channels 356, which are rubber packings with a generally U-shaped cross section. As shown in FIGS. 2 and 3 , heated foam materials 315, 325, 335, and 345 are provided at the positions of the upper frame 31, lower frame 32, vertical frame 33, and exterior joining frame 34 that face the edges of the panel 35 via the grating channels 356. Glass holding brackets 3581, 3582, 3583, and 3584 are provided so as to cover portions of the grating channel 356 via the heated foam materials 315, 325, 335, and 345. A heated foam material 316 is also provided at the portion of the upper frame 31 that faces the underside of the exterior rail 211.

[0017] The outer shoji screen 3 is engaged with the outdoor rails 211, 221 of the upper frame 21 and the lower frame 22 so as to be movable in the left-right direction. The lower frame 32 of the outer shoji screen 3 is provided with a door roller 36 that rolls on the outdoor rail 221 of the lower frame 22.

[0018] The inner shoji screen 4 is constructed by fitting a triple-glazed panel 45 made of three pieces of glass inside a rectangular frame 40 consisting of an upper frame 41, a lower frame 42, a vertical frame 43 located at the door end, and an inner joining frame 44 located at the door tail. The panel 45 has an exterior glass 45a, an interior glass 45b located on the interior side with a gap between them, and an intermediate glass 45c located between the exterior glass 45a and the interior glass 45b.

[0019] Spacers 45d are disposed between exterior glass 45a and intermediate glass 45c, and between interior glass 45b and intermediate glass 45c. The edge of triple-pane panel 45 is held by grating channel 456, a rubber packing with a generally U-shaped cross section. Heat-foaming materials 415, 425, 435, and 445 are provided at positions facing the edge of panel 45 via grating channel 456. Glass retaining brackets 4581, 4582, 4583, and 4584 are provided so as to cover portions of grating channel 456 via heat-foaming materials 415, 425, 435, and 445. Heat-foaming material 416 is also provided at the portion of upper frame 41 facing the underside of interior rail 212.

[0020] The inner shoji screen 4 is engaged with the interior rails 212, 222 of the upper frame 21 and the lower frame 22 so as to be movable in the left-right direction. The lower frame 42 of the inner shoji screen 4 is provided with a door roller 46 that rolls on the interior rail 222 of the lower frame 22.

[0021] As shown in Figures 2 and 3, the upper frame 31, lower frame 32, vertical frame 33 and outer joining frame 34 of the outer shoji screen 3 each have a composite structure in which resin frame members 312, 322, 332, 342 are attached to the indoor side X2 of metal frame members 311, 321, 331, 341. The metal frame members 311, 321, 331, 341 and the resin frame members 312, 322, 332, 342 form U-shaped glass holding grooves 313, 323, 333, 343 that open to the lower side, upper side, door trailing side and door leading side, respectively.

[0022] The upper frame 41, lower frame 42, vertical frame 43 and inner joining frame 44 of the inner shoji screen 4 each have a composite structure in which resin frame members 412, 422, 432 and 442 are attached to the indoor side X2 of metal frame members 411, 421, 431 and 441. The metal frame members 411, 421, 431 and 441 and the resin frame members 412, 422, 432 and 442 form U-shaped glass holding grooves 413, 423, 433 and 443 that open to the lower side, upper side, door trailing edge and door leading edge, respectively.

[0023] In this embodiment, for example, the metal frame materials 311, 321, 331, 341, 411, 421, 431, 441 are made of aluminum material, and the frames of the outer shoji 3 (upper frame 31, lower frame 32, vertical frame 33 located on the door edge side and outer joining frame 34) and the frames of the inner shoji 4 (upper frame 41, lower frame 42, vertical frame 43 located on the door edge side and inner joining frame 44) are made of an aluminum-resin composite structure. This gives the outer shoji 3 and inner shoji 4 excellent heat insulation and moisture resistance.

[0024] As shown in Figure 2, the heated foaming material 315 is positioned within the glass retaining groove 313 of the upper frame 31 of the outer shoji screen 3, straddling and facing the edge of the middle glass 35c and the edge of the interior glass 35b. The interior-side end of the heated foaming material 315 is positioned to coincide with the interior-side surface of the interior glass 35b. The exterior-side end of the heated foaming material 315 is positioned to coincide with the exterior surface of the middle glass 35c.

[0025] The heated foaming material 325 is positioned in the glass holding groove 323 of the bottom frame 32 of the outer shoji screen 3, straddling and facing the edge of the middle glass 35c and the edge of the interior glass 35b. The interior-side end of the heated foaming material 325 is positioned to coincide with the interior-side surface of the interior glass 35b. The exterior-side end of the heated foaming material 325 is positioned to coincide with the exterior surface of the middle glass 35c.

[0026] As shown in Figure 3, the heated foaming material 335 is positioned within the glass retaining groove 333 of the vertical frame 33 of the outer shoji screen 3, straddling and facing the edge of the middle glass 35c and the edge of the interior glass 35b. The interior-side end of the heated foaming material 335 is positioned to coincide with the interior-side surface of the interior glass 35b. The exterior-side end of the heated foaming material 335 is positioned to coincide with the exterior surface of the middle glass 35c.

[0027] The heated foam material 345 is positioned in the glass holding groove 343 of the outer frame 34 of the outer screen 3, straddling and facing the edge of the middle glass 35c and the edge of the interior glass 35b. The interior-side end of the heated foam material 345 is positioned to coincide with the interior-side surface of the interior glass 35b. The exterior-side end of the heated foam material 345 is positioned to coincide with the exterior surface of the middle glass 35c.

[0028] As shown in Figure 2, the heated foaming material 415 is positioned in the glass holding groove 413 of the upper frame 41 of the inner shoji screen 4, straddling and facing the edge of the middle glass 45c and the edge of the inside glass 45b. The inside edge of the heated foaming material 415 is positioned to coincide with the inside surface of the inside glass 45b. The outside edge of the heated foaming material 415 is positioned to coincide with the outside surface of the middle glass 45c.

[0029] The heated foaming material 425 is arranged in the glass holding groove 423 of the bottom frame 42 of the inner shoji screen 4, at a position that straddles and faces the edge of the middle glass 45c and the edge of the inside glass 45b. The inside edge of the heated foaming material 425 is positioned to coincide with the inside surface of the inside glass 45b. The outside edge of the heated foaming material 425 is positioned to coincide with the outside surface of the middle glass 45c.

[0030] As shown in Figure 3, the heated foaming material 445 is disposed in the glass holding groove 443 of the inner frame 44 of the inner shoji screen 4, at a position that straddles and faces the edge of the middle glass 45c and the edge of the interior glass 45b. The interior-side end of the heated foaming material 445 is positioned to coincide with the interior-side surface of the interior glass 45b. The exterior-side end of the heated foaming material 445 is positioned to coincide with the exterior surface of the middle glass 45c.

[0031] The heated foaming material 435 is arranged in the glass holding groove 433 of the vertical frame 43 of the inner shoji screen 4, at a position that straddles and faces the edge of the middle glass 45c and the edge of the inside glass 45b. The inside edge of the heated foaming material 435 is positioned to coincide with the inside surface of the inside glass 45b. The outside edge of the heated foaming material 435 is positioned to coincide with the outside surface of the middle glass 45c.

[0032] In the event of a fire on the exterior side, the foamed heating foam materials 315, 325, 335, 345, 415, 425, 435, and 445 can hold the interior glass panes 35b and 45b and the middle glass panes 35c and 45c. In triple-glazed buildings, the middle glass panes 35c and 45c are the most susceptible to breakage because they are sandwiched between the exterior glass panes 35a and 45a and the interior glass panes 35b and 45b, where heat buildup occurs. However, because the heating foam materials 315, 325, 335, 345, 415, 425, 435, and 445 are not positioned opposite the edges of the exterior glass panes 35a and 45a, the exterior glass panes 35a and 45a can be quickly removed in the event of a fire on the exterior side. This prevents the middle glass panes 35c and 45c from breaking due to heat buildup.

[0033] In addition, with double-glazed glass, the expansion and distortion of one pane of glass can cause the other pane to break. However, because the heat-generating foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 are arranged in this manner, in the event of a fire on the exterior side, the heat-generating foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 foam and expand, separating the intermediate panes 35c and 45c from the interior panes 35b and 45b and the spacers 35d and 45d. This prevents the expansion and distortion of the exterior panes 35a and 45a from affecting the intermediate panes 35c and 45c and the interior panes 35b and 45b, preventing them from breaking.

[0034] Another characteristic of double-glazed glass is that heat received by one pane of glass is transferred to the other pane of glass via the spacer. However, because the heat-generating foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 are arranged in this manner, in the event of a fire on the exterior side, the heat-generating foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 foam and expand, separating the intermediate panes 35c and 45c from the interior panes 35b and 45b and the spacers 35d and 45d. This minimizes the transfer of heat received by the intermediate panes 35c and 45c to the interior panes 35b and 45b. As a result, thermal cracking of the interior panes 35b and 45b is prevented.

[0035] Furthermore, because the heated foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 are arranged in this manner, in the event of a fire on the exterior side, the heated foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 foam and expand in volume, thereby making it possible to hold the intermediate glass panes 35c and 45c and the interior glass panes 35b and 45b to the frame 30. In particular, in the event of a fire on the exterior side, aluminum components such as the vertical frame 33 and the exterior joining frame 34, the intermediate glass panes 35c and 45c, and the interior glass panes 35b and 45b expand upward, but because aluminum has a greater expansion rate than glass, gaps are likely to form between the upper edges of the intermediate glass panes 35c and 45c and the interior glass panes 35b and 45b and the upper frames 31 and 41. However, since the heated foaming materials 315, 415 are positioned opposite the upper edges of the intermediate glass 35c, 45c and the interior glass 35b, 45b, the heated foaming materials 315, 415 expand in the event of a fire and fill this gap, allowing the upper frames 31, 41 to hold the intermediate glass 35c, 45c and the interior glass 35b, 45b.

[0036] The triple glass that makes up the facings 35 and 45 also forms the outer and inner screens 3 and 4 of the aluminum and resin composite sash (forming an aluminum-resin composite structure). This allows the facings 35 and 45 to have excellent thermal insulation performance, which in turn allows for further reductions in CO2 emissions from the home and the realization of a more comfortable thermal environment. Furthermore, because a portion of the facings 35 and 45 is made of aluminum, which is a metal, the facings 35 and 45 can also have excellent fire resistance.

[0037] Furthermore, the heated foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 are disposed between the edges of the intermediate glass panes 35c and 45c and the interior glass panes 35b and 45b and the glass retaining metal fittings 3581, 3582, 3583, 3584, 4581, 4582, 4583, and 4584. Therefore, foaming of the heated foaming materials 315, 325, 335, 345, 415, 425, 435, and 445 makes it possible to prevent the heated glass retaining metal fittings 3581, 3582, 3583, 3584, 4581, 4582, 4583, and 4584 from coming into contact with the intermediate glass panes 35c and 45c and the interior glass panes 35b and 45b in the event of a fire, thereby preventing thermal cracking of these panes.

[0038] Next, a second embodiment of the present disclosure will be described. In the second embodiment, the length of the heated foaming material 435A in the projection direction is different from the length of the heated foaming material 435 in the projection direction of the first embodiment. Similarly, heated foaming materials having the same length in the projection direction as the heated foaming material 435A are provided in the same positions as the heated foaming materials 315, 325, 335, 345, 415, 425, and 445 of the first embodiment. Since the rest of the configuration is the same as in the first embodiment, the same components are denoted by the same reference numerals and their description will be omitted. Furthermore, the description of the heated foaming material having the same length in the projection direction as the heated foaming material 435A will be omitted, and only the heated foaming material 435A will be described.

[0039] As shown in Figure 4, the heated foaming material 435A is disposed in the glass retaining groove 433 of the vertical frame 43 of the inner shoji screen 4, at a position that straddles and faces the edge of the middle glass 45c and the edge of the inside glass 45b. The indoor-side end of the heated foaming material 435A is located on the inside of the room relative to the indoor-side surface of the inside glass 45b. The outdoor-side end of the heated foaming material 435A extends outside beyond the position that coincides with the outdoor surface of the middle glass 45c, and reaches a position that faces the space between the outside glass 45a and the middle glass 45c.

[0040] In addition to the effects obtained in the first embodiment, this configuration allows the heated foaming material 435A to foam on the outdoor side of the intermediate glass 45c, preventing the intermediate glass 45c from collapsing toward the outdoor side in the event of a fire on the outdoor side. Also, this configuration allows the heated foaming material 435A to foam on the indoor side of the indoor glass 45b, preventing the indoor glass 45b from collapsing toward the indoor side in the event of a fire on the outdoor side.

[0041] Next, a third embodiment of the present disclosure will be described. In the third embodiment, the position of the heated foaming material 435B in the projection direction is different from the position of the heated foaming material 435 in the projection direction in the first embodiment. Similarly, in place of the heated foaming materials 315, 325, 335, 345, 415, 425, and 445 in the first embodiment, heated foaming materials are provided whose positions in the projection direction relative to the face materials 35 and 45 are the same as those of the heated foaming material 435B. Since the rest of the configuration is the same as in the first embodiment, the same reference numerals are used for the same components, and their descriptions are omitted. Furthermore, the description of the heated foaming material whose position in the projection direction relative to the face materials 35 and 45 is the same as that of the heated foaming material 435B will be omitted, and only the heated foaming material 435B will be described.

[0042] As shown in Figure 5, the heated foaming material 435B is positioned in the glass holding groove 433 of the vertical frame 43 of the inner shoji screen 4, straddling and facing the edge of the middle glass 45c and the edge of the outside glass 45a. The indoor-side end of the heated foaming material 435B is positioned to coincide with the indoor-side surface of the middle glass 45c. The outdoor-side end of the heated foaming material 435B is positioned to coincide with the outdoor-side surface of the outside glass 45a.

[0043] This allows the foamed heating foam material 435B to hold the exterior glass pane 45a and the middle glass pane 45c in place in the event of a fire on the interior side. In triple-pane windows, the middle glass pane 45c, which is sandwiched between the exterior glass pane 45a and the interior glass pane 45b and where heat buildup occurs, is the most susceptible to breaking. However, because the heating foam material 435B is not positioned opposite the edge of the interior glass pane 45b, it allows the interior glass pane 45b to fall off quickly in the event of a fire on the interior side. This makes it possible to prevent the middle glass pane 45c from breaking due to heat buildup.

[0044] In addition, with double-glazed glass, the expansion and distortion of one pane of glass can cause the other pane to break. However, because the heat-forming material 435B is positioned in this way, in the event of a fire on the indoor side, the heat-forming material 435B foams and expands in volume, separating the middle pane 45c, the outside pane 45a, and the spacer 45d. This prevents the middle pane 45c and the outside pane 45a from being affected by the expansion and distortion of the inside pane 45b, preventing them from breaking.

[0045] Another characteristic of double-glazed glass is that heat received by one pane of glass is transferred to the other pane of glass via the spacer. However, because the heat-generating foam material 435B is positioned in this way, in the event of a fire on the indoor side, the heat-generating foam material 435B foams and expands in volume, separating the middle pane 45c, the outer pane 45a, and the spacer 45d. This minimizes the transfer of heat received by the middle pane 45c to the outer pane 45a. As a result, thermal cracking of the outer pane 45a can be prevented.

[0046] Furthermore, because the heated foam material 435B is arranged in this manner, in the event of a fire on the indoor side, the heated foam material 435B foams and expands in volume, making it possible to hold the middle glass 45c and the outdoor glass 45a to the vertical frame 43.

[0047] Furthermore, the heated foaming material 435B is disposed between the edges of the intermediate glass 45c and the exterior glass 45a and the glass retaining metal fittings 4583. Therefore, foaming of the heated foaming material 435B makes it possible to prevent the heated glass retaining metal fittings 4583 from coming into contact with the intermediate glass 45c and the exterior glass 45a in the event of a fire, thereby preventing thermal cracking of these panes.

[0048] Furthermore, because the foaming material 435B and the like are arranged in this manner, in the event of a fire on the interior side, the foaming material 435B and the like foams and expands in volume, thereby holding the middle glass 45c and the exterior glass 45a to the frame 40. In particular, in the event of a fire on the interior side, aluminum components such as the vertical frame 43 and the exterior joining frame 44, as well as the middle glass 45c and the exterior glass 45a, expand upward. However, because aluminum has a greater expansion rate than glass, gaps are likely to form between the upper edges of the middle glass 45c and the exterior glass 45a and the upper frame 41. However, because the foaming material (not shown) is arranged opposite the upper edges of the middle glass 45c and the exterior glass 45a and in a position similar to the position of the foaming material 435B in the forward direction, the foaming material (not shown) expands in the event of a fire and fills this gap, allowing the upper frame 41 to hold the middle glass 45c and the exterior glass 45a.

[0049] Next, a fourth embodiment of the present disclosure will be described. In the fourth embodiment, the length of the heated foaming material 435C in the projection direction is different from the length of the heated foaming material 435B in the projection direction of the third embodiment. Similarly, instead of the heated foaming materials 315, 325, 335, 345, 415, 425, and 445 of the first embodiment, heated foaming materials having the same length in the projection direction and the same position as the heated foaming material 435C are provided at the positions of the other heated foaming materials provided in the third embodiment. Since the other configurations are the same as those of the third embodiment, the same reference numerals are used for the same components and their description is omitted. Furthermore, the description of the other heated foaming materials having the same length in the projection direction as the heated foaming material 435C will be omitted, and only the heated foaming material 435C will be described.

[0050] As shown in Figure 6, the heated foaming material 435C is arranged in the glass holding groove 443 of the vertical frame 43 of the inner shoji screen 4, at a position that straddles and faces the edge of the middle glass 45c and the edge of the outside glass 45a. The outside end of the heated foaming material 435C is located outside the outside surface of the outside glass 45a. The inside end of the heated foaming material 435C extends inside the room beyond the position that coincides with the inside surface of the middle glass 45c, and extends to a position that faces the space between the inside glass 45b and the middle glass 45c.

[0051] In addition to the effects obtained in the third embodiment, this configuration allows the heated foaming material 435C to foam on the indoor side of the intermediate glass 45c, preventing the intermediate glass 45c from collapsing toward the indoor side in the event of a fire on the indoor side. Also, this configuration allows the heated foaming material 435C to foam on the outdoor side of the outdoor glass 45a, preventing the outdoor glass 45a from collapsing toward the outdoor side in the event of a fire on the indoor side.

[0052] Next, a fifth embodiment of the present disclosure will be described. As shown in Figures 7 to 10, an opening device 1D constituting a fixture is a composite vertical sliding window made of a metal such as aluminum and resin, which can be opened outward by rotating a door body 2D housed in a frame body 10D around a vertical frame on the hanging side by operating a handle 51D, and includes a frame body 10D and a composite door body 2D housed in the frame body 10D so as to be able to open and close. The door body 2D has a frame body 20D assembled into a rectangular shape by an upper frame 21D, a lower frame 22D, and left and right vertical frames 23D, 24D, and glass 100D as a surface material fitted into the frame body 20D.

[0053] The glass 100D is a rectangular triple-pane structure made up of three panes of glass: an exterior pane 100Da, an interior pane 100Db positioned on the interior side with a gap between them, and a middle pane 100Dc positioned between the exterior pane 100Da and the interior pane 100Db, providing excellent thermal insulation.

[0054] Spacers 100Dd are disposed between the exterior glass pane 100Da and the intermediate glass pane 100Dc, and between the interior glass pane 100Db and the intermediate glass pane 100Dc. The edge of the glass pane 100D is held by a grating channel 101D, which is a rubber packing with a generally U-shaped cross section. Heat-expanding foam materials 315D, 325D, 335D, and 345D are provided at the positions of the upper frame 21D, lower frame 22D, and vertical frame 23D, 24D that face the edge of the glass pane 100D via the grating channel 101D. Glass-holding brackets 1021D, 1022D, 1023D, and 1024D are also provided, covering portions of the grating channel 101D via the heat-expanding foam materials 315D, 325D, 335D, and 345D.

[0055] A heated foam material 316D is also provided at the connection between the metal upper frame 111D and the resin upper frame 112D that constitute the upper frame 11D.A heated foam material 326D is also provided at a position above the connecting member 121Dc that connects the metal lower frame 121D and the resin lower frame 122D.A heated foam material 336D is also provided at a position in the metal vertical frame 131D that is farther from the short edge of the interior glass 100Db in the viewing direction than the heated foam material 335D.A heated foam material 346D is also provided at the connection between the metal vertical frame 141D and the resin vertical frame 142D that constitute the vertical frame 14D.

[0056] The upper frame 11D has a metal upper frame 111D made of a metal such as an aluminum alloy and arranged on the outdoor side, and a resin upper frame 112D made of a synthetic resin such as vinyl chloride resin and arranged on the indoor side.

[0057] The metal upper frame 111D has an outer metal upper frame 111Da on the outdoor side and an inner metal upper frame 111Db on the indoor side. The metal upper frame 111D is sandwiched between the outer metal upper frame 111Da and the inner metal upper frame 111Db and has a resin bridge member 111Dc that connects them. The metal upper frame 111D also has a packing 111Dd arranged on the outdoor side.

[0058] The upper resin frame 112D has a lattice portion 112Da that forms a plurality of air chambers 113Da with a rectangular cross section, and a plurality of protrusions 112Db that protrude above the lattice portion 112Da. A plurality of air chambers 113Dc are formed between the metal upper frame 111D and the resin upper frame 112D, separated by a plurality of protrusions 112Db.

[0059] The upper frame 21D has a metal upper frame 211D made of a metal such as an aluminum alloy and arranged on the outdoor side, and a resin upper frame 212D provided on the indoor side and made of a synthetic resin such as vinyl chloride resin. The metal upper frame 211D has a metal upper frame standing portion 211Da that stands vertically from the outside of the room. The tip of the metal upper frame 211D abuts against the gasket 111Dd. The resin upper frame 212D has a lattice-shaped portion 212Da that forms multiple air chambers 213Da with a rectangular cross section.

[0060] The upper frame 21D has a glass holder groove 21Da that opens downward. The glass holder groove 21Da holds the upper end of the glass 100D.

[0061] The lower frame 12D and the lower stile 22D have the same configuration as the upper frame 11D and the upper stile 21D, so corresponding symbols are used and explanations are omitted.

[0062] The door body 2D is connected to the upper frame 11D and the lower frame 12D by an upper arm 91D and a lower arm 92D, respectively, and is suspended within the frame body 10D.

[0063] As shown in Figure 10, the vertical frame 13D on the hanging side has a metal vertical frame 131D made of a metal such as an aluminum alloy and arranged on the outside of the room, and a resin vertical frame 132D made of a synthetic resin such as polyvinyl chloride resin and arranged on the inside of the room.

[0064] The resin vertical frame 132D has a lattice portion 132Da that forms a plurality of air chambers 133Da with a rectangular cross section, and a plurality of protrusions 132Db that protrude laterally from the lattice portion 132Da. A plurality of air chambers 133Dc are formed between the metal vertical frame 131D and the resin vertical frame 132D, separated by the plurality of protrusions 132Db.

[0065] The hanging side vertical frame 23D has a metal vertical frame 231D made of a metal such as an aluminum alloy and arranged on the outdoor side, and a resin vertical frame 232D made of a synthetic resin such as vinyl chloride resin and arranged on the indoor side.

[0066] The metal vertical frame 231D has a horizontal metal vertical frame portion 231Da extending from the exterior side toward the hanging point. The metal vertical frame 231D has a gasket 231Db that is disposed at the tip of the horizontal metal vertical frame portion 231Da and abuts against the metal vertical frame 131. An air chamber 233Da with a rectangular cross section is formed in the resin vertical frame 232D. The vertical frame 23D has a glass holding groove 23Da that is formed and opens on the vertical frame 24D side (the right side in FIG. 10). The side edge of the glass 100D is clamped in the glass holding groove 23Da.

[0067] The vertical frame 14D and vertical stile 24D on the door end side have the same configuration as the vertical frame 13D and vertical stile 23D on the hanging side, so they are given corresponding symbols and their explanations are omitted.

[0068] As shown in Fig. 7, the heated foaming material 315D is disposed in the glass holding groove 21Da at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the interior glass 100Db. The interior-side end of the heated foaming material 315D is positioned to coincide with the interior-side surface of the interior glass 100Db. The exterior-side end of the heated foaming material 315D is positioned to face the upper edge of the intermediate glass 100Dc.

[0069] As shown in Fig. 8, the heated foaming material 325D is disposed in the glass holding groove 22Da at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the interior glass 100Db. The interior-side end of the heated foaming material 325D is positioned to coincide with the interior-side surface of the interior glass 100Db. The exterior-side end of the heated foaming material 325D is positioned to coincide with the exterior-side surface of the intermediate glass 100Dc.

[0070] As shown in Fig. 9, the heated foaming material 345D is disposed in the glass holding groove 24Da at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the interior glass 100Db. The interior-side end of the heated foaming material 345D is positioned to coincide with the interior-side surface of the interior glass 100Db. The exterior-side end of the heated foaming material 345D is positioned to coincide with the exterior-side surface of the intermediate glass 100Dc.

[0071] As shown in Fig. 10, the heated foaming material 335D is disposed in the glass holding groove 23Da at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the interior glass 100Db. The interior-side end of the heated foaming material 335D is positioned to coincide with the interior-side surface of the interior glass 100Db. The exterior-side end of the heated foaming material 335D is positioned to coincide with the exterior-side surface of the intermediate glass 100Dc.

[0072] This makes it possible to achieve the same effects as those achieved in the first embodiment. Specifically, in the event of a fire on the exterior side, the foamed heated foaming materials 315D, 325D, 335D, and 345D can hold the interior glass 100Db and the intermediate glass 100Dc. Furthermore, because the heated foaming materials 315D, 325D, 335D, and 345D are not positioned opposite the edge of the exterior glass 100Da, the exterior glass 100Da can be quickly removed in the event of a fire on the exterior side. This makes it possible to prevent the intermediate glass 100Dc from cracking due to heat buildup.

[0073] Furthermore, because the heated foaming materials 315D, 325D, 335D, and 345D are arranged in this manner, in the event of a fire on the exterior side, the heated foaming materials 315D, 325D, 335D, and 345D will foam and expand in volume, separating the intermediate glass 100Dc, the interior glass 100Db, and the spacer 100Dd. This prevents the expansion and distortion of the exterior glass 100Da from affecting the intermediate glass 100Dc and the interior glass 100Db, preventing them from cracking.

[0074] Furthermore, because the heat-generating foaming materials 315D, 325D, 335D, and 345D are arranged in this manner, in the event of a fire on the exterior side, the heat-generating foaming materials 315D, 325D, 335D, and 345D foam and expand, separating the intermediate glass 100Dc, the interior glass 100Db, and the spacer 100Dd. This minimizes the transfer of heat received by the intermediate glass 100Dc to the interior glass 100Db. As a result, it is possible to prevent thermal cracking of the interior glass 100Db.

[0075] Furthermore, because the heated foaming materials 315D, 325D, 335D, and 345D are arranged in this manner, in the event of a fire on the exterior side, the heated foaming materials 315D, 325D, 335D, and 345D will foam and expand in volume, thereby holding the middle glass 100Dc and the interior glass 100Db to the frame 20D. In particular, in the event of a fire, aluminum components such as the left and right vertical frames 23D and 24D, the middle glass 100Dc, and the interior glass 100Db will expand upward, but because aluminum has a greater expansion rate than glass, gaps are likely to form between the upper edges of the middle glass 100Dc and the interior glass 100Db and the upper frame 21D. However, since the heated foam material 315D is positioned opposite the upper edges of the intermediate glass 100Dc and the interior glass 100Db, the heated foam material 315D expands in the event of a fire and fills this gap, allowing the upper frame 21D to hold the intermediate glass 100Dc and the interior glass 100Db.

[0076] Furthermore, the heated foaming materials 315D, 325D, 335D, and 345D are disposed between the edges of the intermediate glass 100Dc and the interior glass 100Db and the glass retaining metal fittings 1021D, 1022D, 1023D, and 1024D. Therefore, foaming of the heated foaming materials 315D, 325D, 335D, and 345D makes it possible to prevent contact between the heated glass retaining metal fittings 1021D, 1022D, 1023D, and 1024D and the intermediate glass 100Dc and the interior glass 100Db in the event of a fire, thereby preventing thermal cracking of these panes.

[0077] Next, a sixth embodiment of the present disclosure will be described. In the sixth embodiment, the length of the heated foaming material 345E in the projection direction is different from the length of the heated foaming material 345D in the projection direction of the fifth embodiment. Similarly, heated foaming materials having the same length in the projection direction as the heated foaming material 345E are provided in the same positions as the heated foaming materials 315D, 325D, and 335D in the fifth embodiment. Since the rest of the configuration is the same as in the fifth embodiment, the same components are assigned the same reference numerals and their description will be omitted. Furthermore, the description of the heated foaming material having the same length in the projection direction as the heated foaming material 345E will be omitted, and only the heated foaming material 345E will be described.

[0078] As shown in Fig. 11, the heated foaming material 345E is disposed within the glass retaining groove 24Da, at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the interior glass 100Db. The interior-side end of the heated foaming material 345E is located on the interior side of the interior surface of the interior glass 100Db. The exterior-side end of the heated foaming material 345E extends beyond a position that coincides with the exterior surface of the intermediate glass 100Dc to a position that faces the space between the exterior glass 100Da and the intermediate glass 100Dc.

[0079] In addition to the effects obtained in the fifth embodiment, this configuration allows the heated foaming material 345E to foam on the outdoor side of the intermediate glass 100Dc, preventing the intermediate glass 100Dc from collapsing to the outdoor side in the event of an outdoor fire. Also, this configuration allows the heated foaming material 345E to foam on the indoor side of the indoor glass 100Db, preventing the indoor glass 100Db from collapsing to the indoor side in the event of an outdoor fire.

[0080] Next, a seventh embodiment of the present disclosure will be described. In the seventh embodiment, the position of the heated foaming material 345F in the projection direction is different from the position of the heated foaming material 345D in the projection direction in the fifth embodiment. Similarly, heated foaming materials whose positions in the projection direction relative to the glass 100D are the same as those of the heated foaming material 345F are provided in place of the heated foaming materials 315D, 325D, and 335D in the fifth embodiment. Since the rest of the configuration is the same as in the fifth embodiment, the same components are assigned the same reference numerals and their descriptions are omitted. Furthermore, the description of the heated foaming material whose position in the projection direction relative to the glass 100D is the same as that of the heated foaming material 345F will be omitted, and only the heated foaming material 345F will be described.

[0081] As shown in Fig. 12, the heated foaming material 345F is disposed in the glass holding groove 24Da, at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the exterior glass 100Da. The interior-side end of the heated foaming material 345F is positioned to coincide with the interior-side surface of the intermediate glass 100Dc. The exterior-side end of the heated foaming material 345F is positioned to coincide with the exterior-side surface of the exterior glass 100Da.

[0082] This makes it possible to achieve the same effects as those achieved in the third embodiment. That is, in the event of a fire on the indoor side, the foamed heated foaming material 345F can hold the outdoor glass 100Da and the intermediate glass 100Dc. Furthermore, because the heated foaming material 345F is not positioned opposite the edge of the indoor glass 100Db, in the event of a fire on the indoor side, the indoor glass 100Db can be quickly removed. This makes it possible to prevent the intermediate glass 100Dc from cracking due to heat buildup.

[0083] Furthermore, because the heat-generating foam material 345F is positioned in this manner, in the event of a fire on the indoor side, the heat-generating foam material 345F foams and expands in volume, separating the intermediate glass 100Dc, the exterior glass 100Da, and the spacer 100Dd. This prevents the expansion and distortion of the interior glass 100Db from affecting the intermediate glass 100Dc and the exterior glass 100Da, preventing them from cracking.

[0084] Furthermore, because the heat-generating foaming material 345F is positioned in this manner, in the event of a fire on the interior side, the heat-generating foaming material 435B foams and expands in volume, separating the intermediate glass 100Dc, the exterior glass 100Da, and the spacer 100Dd. This minimizes the transfer of heat received by the intermediate glass 100Dc to the exterior glass 100Da. As a result, it is possible to prevent thermal cracking of the exterior glass 100Da.

[0085] Furthermore, because the heated foam material 345F is arranged in this manner, in the event of a fire on the indoor side, the heated foam material 345F will foam and expand in volume, making it possible to hold the intermediate glass 100Dc and the outdoor glass 100Da to the vertical frame 24D.

[0086] The heated foaming material 345F is disposed between the edges of the intermediate glass 100Dc and the exterior glass 100Da and the glass retaining metal fittings 1024D. Therefore, in the event of a fire, foaming of the heated foaming material 345F prevents contact between the heated glass retaining metal fittings 1024D and the intermediate glass 100Dc and the exterior glass 100Da, thereby preventing thermal cracking of these panes.

[0087] Next, an eighth embodiment of the present disclosure will be described. In the eighth embodiment, the length of the heated foaming material 345G in the projection direction is different from the length of the heated foaming material 345F in the projection direction of the seventh embodiment. Similarly, heated foaming materials having the same length and position in the projection direction as the heated foaming material 345G are provided in the positions of the other heated foaming materials provided in the seventh embodiment, instead of the heated foaming materials 315D, 325D, and 335D of the fifth embodiment. Since the rest of the configuration is the same as in the seventh embodiment, the same components are designated by the same reference numerals and their description will be omitted. Furthermore, the description of the other heated foaming materials having the same length in the projection direction as the heated foaming material 345G will be omitted, and only the heated foaming material 345G will be described.

[0088] As shown in Fig. 13, the heated foaming material 345G is disposed in the glass holding groove 24Da at a position that straddles and faces the edge of the intermediate glass 100Dc and the edge of the exterior glass 100Da. The exterior end of the heated foaming material 345G is located outside the exterior surface of the exterior glass 100Da. The interior end of the heated foaming material 345G extends interiorward beyond a position that coincides with the interior surface of the intermediate glass 100Dc, until it reaches a position that faces the space between the interior glass 100Db and the intermediate glass 100Dc.

[0089] In addition to the effects of the seventh embodiment, this configuration allows the heated foaming material 345G to foam on the interior side of the intermediate glass 100Dc, preventing the intermediate glass 100Dc from collapsing toward the interior side in the event of a fire on the interior side. Also, the heated foaming material 345G to foam on the exterior side of the exterior glass 100Da, preventing the exterior glass 100Da from collapsing toward the exterior side in the event of a fire on the interior side.

[0090] Next, a ninth embodiment of the present disclosure will be described. As shown in Figures 14 to 16, an opening device 1H constituting a fitting is a horizontal sliding window that can be opened and closed by operating a handle 51H, and includes a frame body 10H and a composite door body 2H that is housed in the frame body 10H so that it can be opened and closed. The door body 2H has a frame body 20H that is assembled into a rectangular shape by an upper frame 21H, a lower frame 22H, and a left vertical frame and a right vertical frame 24H (not shown), and glass 100H that serves as a face material fitted into the frame body 20H.

[0091] Glass 100H is a rectangular triple glazing consisting of three panes of glass: an exterior pane 100Ha, an interior pane 100Hb positioned on the interior side with a gap between it and the exterior pane 100Ha, and an intermediate pane 100Hc positioned between the exterior pane 100Ha and the interior pane 100Hb, providing excellent thermal insulation.

[0092] Spacers 100Hd are disposed between the exterior glass 100Ha and the intermediate glass 100Hc, and between the interior glass 100Hb and the intermediate glass 100Hc. The edge of the glass 100H is held in place by a grating channel 101H, which is a rubber packing with a roughly U-shaped cross section. Heat-expanding foam materials 315H, 325H, and 345H are provided at the positions of the upper frame 21H, lower frame 22H, and vertical frame 24H that face the edge of the glass 100H via the grating channel 101H. Glass-holding brackets 1032H and 1034H are also provided, covering portions of the grating channel 101H via the heat-expanding foam materials 325H and 345H.

[0093] Heat-forming materials 316H and 317H are also provided inside the exterior end of the metal upper frame 211H that constitutes the upper frame 21H, and inside the metal upper frame 211H at a position that coincides with the interior glass 100Hb in the projection direction. Heat-forming material 326H is also provided within the glass retaining groove 22Ha of the lower frame 22H at a position that coincides with the middle glass 100Hc in the projection direction. Heat-forming material 327H is also provided below the connecting member 222H that connects the metal lower frame 221H and the resin lower frame 122H that constitute the lower frame 22H. Heat-forming material 346H is also provided at the connection between the metal vertical frame 141H and the resin vertical frame 142H that constitute the vertical frame 14H.

[0094] The upper frame 11H has a metal upper frame 111H made of a metal such as an aluminum alloy and arranged on the outdoor side, and a resin upper frame 112H made of a synthetic resin such as vinyl chloride resin and arranged on the indoor side.

[0095] The metal upper frame 111H has an outer metal upper frame 111Ha on the outdoor side and an inner metal upper frame 111Hb on the indoor side. The metal upper frame 111H is sandwiched between the outer metal upper frame 111Ha and the inner metal upper frame 111Hb and has a resin bridge member 111Hc that connects them. The metal upper frame 111H also has a packing 111Hd arranged on the outdoor side.

[0096] The upper resin frame 112H has a lattice portion 112Ha that forms a plurality of air chambers 113Ha each having a rectangular cross section, and a plurality of protrusions 112Hb that protrude upward from the lattice portion 112Ha. A plurality of air chambers 113Hc are formed between the metal upper frame 111H and the resin upper frame 112H, separated by a plurality of protrusions 112Hb.

[0097] The upper frame 21H has a metal upper frame 211H made of a metal such as an aluminum alloy and arranged on the outdoor side, and a resin upper frame 212H made of a synthetic resin such as polyvinyl chloride resin and arranged on the indoor side. The tip of the metal upper frame 211H abuts against the packing 111Hd. The resin upper frame 212H has a lattice-like portion 212Ha that forms multiple air chambers 213Ha with rectangular cross sections. The upper frame 21H has a glass holding groove 21Ha that opens downward. The upper end of the glass 100H is clamped in the glass holding groove 21Ha.

[0098] The lower frame 12H and the lower stile 22H have the same configuration as the upper frame 11H and the upper stile 21H, so corresponding symbols are used and explanations are omitted.

[0099] The vertical frame 14H includes a metal vertical frame 141H made of a metal such as an aluminum alloy and positioned on the exterior side of the room, and a resin vertical frame 142H made of a synthetic resin such as polyvinyl chloride and positioned on the interior side. The resin vertical frame 142H includes a lattice portion 142Ha that forms multiple air chambers 143Ha with rectangular cross sections, and multiple protrusions 142Hb that protrude laterally from the lattice portion 142Ha. A plurality of air chambers 143Hc are formed between the metal vertical frame 141H and the resin vertical frame 142H, separated by the multiple protrusions 142Hb.

[0100] The vertical frame 24H includes a metal vertical frame 241H made of a metal such as aluminum alloy and positioned on the outdoor side, and a resin vertical frame 242H made of a synthetic resin such as polyvinyl chloride resin and positioned on the indoor side. The metal vertical frame 241H has a horizontal metal vertical frame portion 241Ha extending from the outdoor side toward the hanging point. The metal vertical frame 241H has a gasket 241Hb positioned at the tip of the horizontal metal vertical frame portion 241Ha and abutting against the metal vertical frame 141. An air chamber 243Ha with a rectangular cross section is formed in the resin vertical frame 242H. The vertical frame 24H has a glass holding groove 24Ha that opens toward the vertical frame side (not shown) (left side in FIG. 16). The glass holding groove 24Ha holds the side edge of the glass 100H.

[0101] The vertical frame and vertical stiles (not shown) have the same configuration as the vertical frame 14H and vertical stile 24H, and therefore description thereof will be omitted.

[0102] As shown in FIG. 14, the heated foaming material 315H is disposed in the glass holding groove 21Ha at a position facing the edge of the intermediate glass 100Hc with the grating channel 101H interposed therebetween.

[0103] As shown in Fig. 15, the heated foaming material 325H is disposed within the glass holding groove 22Ha, at a position that straddles and faces the edge of the intermediate glass 100Hc and the edge of the interior glass 100Hb. The interior-side end of the heated foaming material 325H is located inside the interior of the interior surface of the interior glass 100Hb. The exterior-side end of the heated foaming material 325H is located at the center of the intermediate glass 100Hc in the projection direction.

[0104] As shown in Figure 16, the heated foaming material 345H is disposed in the glass holding groove 24Ha, straddling and facing the edge of the intermediate glass 100Hc and the edge of the interior glass 100Hb. The interior-side end of the heated foaming material 345H is positioned to coincide with the interior-side surface of the interior glass 100Hb. The exterior-side end of the heated foaming material 345H is positioned to coincide with the exterior-side surface of the intermediate glass 100Hc.

[0105] This makes it possible to obtain the same effects as those obtained in the first embodiment. That is, in the event of a fire on the exterior side, the foamed heated foaming material 345H can hold the interior glass 100Hb and the intermediate glass 100Hc. Furthermore, because the heated foaming material 345H is not positioned opposite the edge of the exterior glass 100Ha, in the event of a fire on the exterior side, the exterior glass 100Ha can be quickly removed. This makes it possible to prevent the intermediate glass 100Hc from cracking due to heat buildup.

[0106] Furthermore, because the heat-generating foam material 345H is positioned in this manner, in the event of a fire on the exterior side, the heat-generating foam material 345H will foam and expand, separating the intermediate glass 100Hc, the interior glass 100Hb, and the spacer 100Hd. This prevents the effects of expansion and distortion of the exterior glass 100Ha from affecting the intermediate glass 100Hc and the interior glass 100Hb, preventing them from cracking.

[0107] Furthermore, because the heat-generating foam material 345H is positioned in this manner, in the event of a fire on the exterior side, the heat-generating foam material 345H will foam and expand, separating the intermediate glass 100Hc, the interior glass 100Hb, and the spacer 100Hd. This minimizes the transfer of heat received by the intermediate glass 100Hc to the interior glass 100Hb. As a result, it is possible to prevent thermal cracking of the interior glass 100Hb.

[0108] Furthermore, because the heating foam material 345H is arranged in this manner, in the event of a fire on the exterior side, the heating foam material 345H will foam and expand in volume, making it possible to hold the intermediate glass 100Hc and the interior glass 100Hb to the frame 20H.

[0109] Additionally, the heated foaming materials 325H and 345H are disposed between the edges of the intermediate glass 100Hc and the interior glass 100Hb and the glass retaining metal fittings 1032H and 1034H. As a result, foaming of the heated foaming materials 325H and 345H prevents the heated glass retaining metal fittings 1032H and 1034H from coming into contact with the intermediate glass 100Hc and the interior glass 100Hb in the event of a fire, thereby preventing thermal cracking of these panes.

[0110] Next, a tenth embodiment of the present disclosure will be described. In the tenth embodiment, the length of the heated foaming material 345I in the projection direction is different from the length of the heated foaming material 345H in the projection direction of the ninth embodiment. Since the other configurations are the same as those of the ninth embodiment, the same members are denoted by the same reference numerals and the description thereof will be omitted.

[0111] As shown in Fig. 17, the heated foaming material 345I is disposed within the glass retaining groove 24Ha, at a position that straddles and faces the edge of the intermediate glass sheet 100Hc and the edge of the interior glass sheet 100Hb. The interior-side end of the heated foaming material 345I is located on the interior side of the interior surface of the interior glass sheet 100Hb. The exterior-side end of the heated foaming material 345I extends beyond a position that coincides with the exterior surface of the intermediate glass sheet 100Hc to a position that faces the space between the exterior glass sheet 100Ha and the intermediate glass sheet 100Hc.

[0112] In addition to the effects of the ninth embodiment, this configuration allows the heated foaming material 345I to foam on the exterior side of the intermediate glass 100Hc, preventing the intermediate glass 100Hc from collapsing to the exterior in the event of an exterior fire. It also allows the heated foaming material 345I to foam on the interior side of the interior glass 100Hb, preventing the interior glass 100Hb from collapsing to the interior in the event of an exterior fire.

[0113] Next, an eleventh embodiment of the present disclosure will be described. In the eleventh embodiment, the position of the heated foaming material 345J in the projection direction is different from the position of the heated foaming material 345H in the projection direction in the ninth embodiment. Since the other configurations are the same as those in the ninth embodiment, the same reference numerals are used for the same members and the description thereof will be omitted.

[0114] As shown in Fig. 18, the heated foaming material 345J is disposed in the glass holding groove 24Ha, at a position that straddles and faces the edge of the intermediate glass 100Hc and the edge of the exterior glass 100Ha. The interior-side end of the heated foaming material 345J is positioned to coincide with the interior-side surface of the intermediate glass 100Hc. The exterior-side end of the heated foaming material 345J is positioned to coincide with the exterior-side surface of the exterior glass 100Ha.

[0115] This makes it possible to achieve the same effects as those achieved in the third embodiment. That is, in the event of a fire on the interior side, the foamed heated foaming material 345J can hold the exterior glass 100Ha and the intermediate glass 100Hc. Furthermore, because the heated foaming material 345J is not positioned opposite the edge of the interior glass 100Hb, in the event of a fire on the interior side, the interior glass 100Hb can be quickly removed. This makes it possible to prevent the intermediate glass 100Hc from cracking due to heat buildup.

[0116] Furthermore, because the heat-generating foam material 345J is positioned in this manner, in the event of a fire on the indoor side, the heat-generating foam material 345J foams and expands in volume, separating the intermediate glass 100Hc, the exterior glass 100Ha, and the spacer 100Hd. This prevents the expansion and distortion of the interior glass 100Hb from affecting the intermediate glass 100Hc and the exterior glass 100Ha, preventing them from cracking.

[0117] Furthermore, because the heat-generating foam material 345J is positioned in this manner, in the event of a fire on the interior side, the heat-generating foam material 345J foams and expands in volume, separating the intermediate glass 100Hc, the exterior glass 100Ha, and the spacer 100Hd. This minimizes the transfer of heat received by the intermediate glass 100Hc to the exterior glass 100Ha. As a result, it is possible to prevent thermal cracking of the exterior glass 100Ha.

[0118] Furthermore, because the heating foam material 345J is arranged in this manner, in the event of a fire on the indoor side, the heating foam material 345J will foam and expand in volume, making it possible to hold the intermediate glass 100Hc and the outdoor glass 100Ha to the vertical frame 24H.

[0119] The heated foaming material 345J is disposed between the edges of the intermediate glass 100Hc and the exterior glass 100Ha and the glass retaining metal fittings 1034H. As a result, foaming of the heated foaming material 345J prevents contact between the heated glass retaining metal fittings 1034H and the intermediate glass 100Hc and the exterior glass 100Ha in the event of a fire, thereby preventing thermal cracking of these panes.

[0120] Next, a twelfth embodiment of the present disclosure will be described. In the twelfth embodiment, the length of the heated foaming material 345K in the projection direction is different from the length of the heated foaming material 345J in the projection direction of the eleventh embodiment. Since the other configurations are the same as those of the eleventh embodiment, the same members are assigned the same reference numerals and descriptions thereof will be omitted.

[0121] As shown in Fig. 19, the heated foaming material 345K is disposed within the glass retaining groove 24Ha, at a position that straddles and faces the edge of the intermediate glass pane 100Hc and the edge of the exterior glass pane 100Ha. The exterior end of the heated foaming material 345K is located outside the exterior surface of the exterior glass pane 100Ha. The interior end of the heated foaming material 345K extends interiorward beyond a position that coincides with the interior surface of the intermediate glass pane 100Hc, until it reaches a position that faces the space between the interior glass pane 100Hb and the intermediate glass pane 100Hc.

[0122] In addition to the effects of the eleventh embodiment, this configuration allows the thermal foaming material 345K to foam on the interior side of the intermediate glass 100Hc, preventing the intermediate glass 100Hc from collapsing toward the interior side in the event of a fire on the interior side. It also allows the thermal foaming material 345K to foam on the exterior side of the exterior glass 100Ha, preventing the exterior glass 100Ha from collapsing toward the exterior side in the event of a fire on the interior side.

[0123] Next, a thirteenth embodiment of the present disclosure will be described. In this embodiment, the fixture is constituted by a fixed window (fixed window) 1L that is fitted into an opening formed in a wall of a building and has a frame attached to the opening edge. As shown in Figures 20 to 22, the fixed window 1L is constituted by an opening device 30L that includes a window frame 10L as a rectangular frame body formed by an upper frame 100L, a lower frame 200L, a vertical frame (not shown) on the left side, and a vertical frame 400L on the right side, and a rectangular glass 20L that is fitted and fixed into the window frame 10L.

[0124] The window frame 10L is composed of a rectangular metal frame 11L and a rectangular resin frame 12L that covers the interior side of the metal frame 11L. In other words, the fixed window 1L according to this embodiment has excellent heat insulation properties because the interior side of the metal frame 11L is covered with the resin frame 12L, which has low thermal conductivity.

[0125] The metal frame 11L is made of, for example, aluminum. More specifically, the metal frame 11L is obtained by extruding aluminum. The metal frame 11L is made up of an upper metal frame 111L, a lower metal frame 112L, a vertical metal frame (not shown) on the left side, and a vertical metal frame 114L on the right side, and adjacent frames are fixed together with screws.

[0126] The resin frame 12L is obtained by extrusion molding a synthetic resin such as polyvinyl chloride resin. The resin frame 12L is composed of a resin upper frame 121L, a resin lower frame 122L, a left-side vertical resin frame (not shown), and a right-side vertical resin frame 124L. The resin upper frame 121L is attached to a metal upper frame 111L, and the resin lower frame 122L is attached to a metal lower frame 112L. The left-side vertical resin frame (not shown) and the right-side vertical resin frame 124L are attached to the left-side vertical metal frame (not shown) and the right-side vertical metal frame 114L, respectively. As a result, the upper frame 100L is composed of the metal upper frame 111L and the resin upper frame 121L, the lower frame 200L is composed of the metal lower frame 112L and the resin lower frame 122L, and the vertical frame 400L is composed of the metal vertical frame 114L and the resin vertical frame 124L.

[0127] As shown in Figure 20, the glass panel 20L is a rectangular triple-pane glass panel made up of three panes of glass. The glass panel 20L has an exterior pane 20La, an interior pane 20Lb that is positioned on the interior side with a gap between it and the exterior pane 20La, and an intermediate pane 20Lc that is positioned between the exterior pane 20La and the interior pane 20Lb. Spacers 20Ld are positioned between the exterior pane 20La and the intermediate pane 20Lc, and between the interior pane 20Lb and the intermediate pane 20Lc.

[0128] The metal upper frame 111L has a hollow structure with a hollow portion 111La. An upper frame glass support portion 111Lb that protrudes downward is formed at the outdoor end of the lower surface of the hollow portion 111La of the metal upper frame 111L. A buffer member 104L is attached to the tip of the upper frame glass support portion 111Lb, and the upper frame glass support portion 111Lb supports the peripheral edge of the glass 20L via the buffer member 104L.

[0129] An upper frame horizontal section 111Lc is connected to the indoor end of the lower surface of the hollow section 111La of the metal upper frame 111L, and an upper frame vertical section 111Ld is formed on the upper frame horizontal section 111Lc and extends vertically. A resin upper frame main body section 121La that constitutes the resin upper frame 121L is attached to the upper frame vertical section 111Ld.

[0130] An upper frame inner flaming member 31L is attached to the resin upper frame main body portion 121La. A buffer member 105L is attached to the tip of the upper frame inner flaming member 31L. The upper frame inner flaming member 31L presses the peripheral edge of the glass 20L via the buffer member 105L. As a result, the peripheral edge of the glass 20L is clamped in the glass holding groove 111Lh formed between the upper frame inner flaming member 31L and the upper frame glass support portion 111Lb, which opens downward in a U-shape. An insulating sheet 3191L made of an insulating sealant is arranged on the surface of the upper frame inner flaming member 31L that forms the glass holding groove 111Lh. This makes it possible to achieve excellent thermal insulation.

[0131] The lower metal frame 112L has a hollow structure with a lower hollow portion 112Lb and an upper hollow portion 112La separated by a partition wall 112Lc. Above the upper hollow portion 112La of the lower metal frame 112L, a first standing portion 112Le standing upward from the outside edge and a glass holding groove 112Lh are formed. A buffer member 206L is attached to the tip of the first standing portion 112Le, and the first standing portion 112Le supports the peripheral edge of the glass 20L via the buffer member 206L.

[0132] A lower frame horizontal section 112Lf is connected to the indoor side of the upper hollow section 112La of the metal lower frame 112L, and a lower frame vertical section 112Lg extending vertically and approximately perpendicularly from the lower frame horizontal section 112Lf is formed. A resin lower frame main body 122La constituting the resin lower frame 122L is attached to the lower frame vertical section 112Lg. A buffer member 207L is attached to the outdoor end of the resin lower frame 122L. The outdoor end of the resin lower frame 122L supports the peripheral edge of the glass 20L via the buffer member 207L. As a result, the peripheral edge of the glass 20L is clamped between the resin lower frame 122L and the first upright section 112Le in a glass holding groove 112Lh that is formed between them and opens upward in a U-shape.

[0133] In the glass holding groove 112Lh, a heat insulating sheet 3291L made of a heat insulating sealant is arranged at a position facing the interior facing surface of the glass 20L, between the resin lower frame 122L and the buffer member 207L. In addition, in the glass holding groove 112Lh, a heat insulating sheet 3292L is arranged at a position one step lower than the position where the heat insulating sheet 3291L is arranged. This makes it possible to obtain excellent heat insulation.

[0134] Since the configuration of the right vertical frame 400L is the same as that of the left vertical frame (not shown), only the configuration of the right vertical frame 400L will be described below.

[0135] 22, a vertical frame glass support portion 114La is formed on the exterior side of the vertical metal frame 114L, protruding from the vertical metal frame 114L toward the glass 20L in the viewing direction. A buffer member 401L is attached to the tip of the vertical frame glass support portion 114La, and the vertical frame glass support portion 114La supports the peripheral edge of the glass 20L via the buffer member 401L.

[0136] A resin vertical frame body 124La, which constitutes the resin vertical frame 124L, is attached to the glass 20L side of the metal vertical frame 114L on the indoor side. A vertical frame ribbing 34L, composed of a hollow, elongated member, is attached to the resin vertical frame body 124La. A buffer member 403L is attached to the tip of the vertical frame ribbing 34L on the glass 20L side, and the vertical frame ribbing 34L presses the peripheral edge of the glass 20L via the buffer member 403L. This clamps the peripheral edge of the glass 20L between the vertical frame ribbing 34L and the vertical frame glass support member 114La. Two heat insulating sheets 3491L and 3492L, composed of heat insulating sealant, are arranged within the glass retaining groove 114Lh, sandwiching a glass retaining bracket 70L between the edge of the glass 20L near the vertical frame ribbing 34L and the vertical frame ribbing 34L. This makes it possible to obtain excellent heat insulation properties.

[0137] Glass holding fittings 70L are disposed in the space between the metal vertical frame 114L and the side edges of the glass 20L. The glass holding fittings 70L extend in the vertical direction around the periphery of the glass 20L. The glass holding fittings 70L are U-shaped so as to cover the periphery of the glass 20L with a gap.

[0138] The fixed window (fixed window) 1L is provided with heated foam materials 315L, 316L, 325L, 326L, 327L, 328L, 345L, 346L, and 347L.

[0139] As shown in Figure 20, the heated foaming material 315L is arranged in the glass holding groove 111Lh at a position that straddles and faces the edge of the intermediate glass 20Lc and the edge of the interior glass 20Lb. The indoor-side end of the heated foaming material 315L is positioned to coincide with the indoor-side surface of the interior glass 20Lb. The outdoor-side end of the heated foaming material 315L is positioned to coincide with the outdoor-side surface of the intermediate glass 20Lc. In addition, the heated foaming material 316L is arranged on the inner surface of the upper frame glass support portion 111Lb.

[0140] As shown in Fig. 21, the heated foaming material 325L is disposed in the glass holding groove 112Lh at a position that straddles and faces the edge of the intermediate glass 20Lc and the edge of the indoor glass 20Lb. The indoor-side end of the heated foaming material 325L is located closer to the indoor side than the indoor-side surface of the indoor glass 20Lb. The outdoor-side end of the heated foaming material 325L is positioned so as to coincide with the outdoor-side surface of the intermediate glass 20Lc.

[0141] The heated foam material 326L is disposed on the inner surface of the first standing portion 112Le. The heated foam material 327L is disposed at the connecting portion between the metal lower frame 112L and the lower frame horizontal portion 112Lf. The heated foam material 328L is disposed on the outdoor side of the heated foam material 327L.

[0142] As shown in Fig. 22, the heated foaming material 345L is disposed in the glass holding groove 114Lh at a position that straddles and faces the edge of the intermediate glass 20Lc and the edge of the interior glass 20Lb. The indoor-side end of the heated foaming material 345L is positioned to coincide with the indoor-side surface of the interior glass 20Lb. The outdoor-side end of the heated foaming material 345L is positioned to coincide with the outdoor-side surface of the intermediate glass 20Lc.

[0143] The heated foaming material 346L is disposed on the inner surface of the vertical metal frame 114L. The heated foaming material 347L is disposed on the inner surface of the vertical frame glass supporting portion 114La.

[0144] This makes it possible to obtain the same effects as those obtained in the first embodiment. That is, in the event of a fire on the exterior side, the foamed heated foaming materials 315L, 325L, and 345L can hold the interior glass 20Lb and the intermediate glass 20Lc. Furthermore, because the heated foaming materials 315L, 325L, and 345L are not positioned opposite the edge of the exterior glass 20La, the exterior glass 20La can be quickly removed in the event of a fire on the exterior side. This makes it possible to prevent the intermediate glass 20Lc from cracking due to heat buildup.

[0145] Furthermore, because the heated foaming materials 315L, 325L, and 345L are arranged in this manner, in the event of a fire on the exterior side, the heated foaming materials 315L, 325L, and 345L foam and expand in volume, thereby separating the intermediate glass 20Lc, the interior glass 20Lb, and the spacer 20Ld. This prevents the expansion and distortion of the exterior glass 20La from affecting the intermediate glass 20Lc and the interior glass 20Lb, preventing them from cracking.

[0146] Furthermore, because the heat-generating foaming materials 315L, 325L, and 345L are arranged in this manner, in the event of a fire on the exterior side, the heat-generating foaming materials 315L, 325L, and 345L foam and expand, separating the intermediate glass 20Lc, the interior glass 20Lb, and the spacer 20Ld. This minimizes the transfer of heat received by the intermediate glass 20Lc to the interior glass 20Lb. As a result, it is possible to prevent thermal cracking of the interior glass 20Lb.

[0147] Furthermore, because the heated foaming materials 315L, 325L, and 345L are arranged in this manner, in the event of a fire on the exterior side, the heated foaming materials 315L, 325L, and 345L foam and expand, thereby holding the middle glass 20Lc and the interior glass 20Lb to the window frame 10L. In particular, in the event of a fire, aluminum components such as the left and right vertical frames 400L, the middle glass 20Lc, and the interior glass 20Lb expand upward. However, because aluminum has a greater expansion rate than glass, gaps are likely to form between the upper edges of the middle glass 20Lc and the interior glass 20Lb and the upper frame 100L. However, because the heated foaming material 315L is arranged in a position opposite the upper edges of the middle glass 20Lc and the interior glass 20Lb, the expanded heated foaming material 315L fills this gap during a fire, allowing the upper frame 100L to hold the middle glass 20Lc and the interior glass 20Lb.

[0148] In addition, since the heated foaming material 345L is positioned between the edges of the intermediate glass 20Lc and the interior glass 20Lb and the glass retaining fittings 70L, the foaming of the heated foaming material 345L makes it possible to prevent contact between the heated glass retaining fittings 70L and the intermediate glass 20Lc and the interior glass 20Lb in the event of a fire, thereby preventing thermal cracking of these panes of glass.

[0149] Next, a fourteenth embodiment of the present disclosure will be described. In the fourteenth embodiment, the length of the heated foaming material 345M in the projection direction is different from the length of the heated foaming material 345L in the projection direction of the thirteenth embodiment. Other configurations are the same as those of the thirteenth embodiment, and therefore the same members are designated by the same reference numerals and will not be described again.

[0150] As shown in Fig. 23, the heated foaming material 345M is disposed in the glass holding groove 114Lh at a position that straddles and faces the edge of the intermediate glass sheet 20Lc and the edge of the interior glass sheet 20Lb. The indoor-side end of the heated foaming material 345M is located on the interior side of the interior surface of the interior glass sheet 20Lb. The outdoor-side end of the heated foaming material 345M extends outside beyond a position that coincides with the outdoor-side surface of the intermediate glass sheet 20Lc, and reaches a position that faces the space between the exterior glass sheet 20La and the intermediate glass sheet 20Lc.

[0151] In addition to the effects obtained in the thirteenth embodiment, this configuration allows the heated foaming material 345M to foam on the outdoor side of the intermediate glass 20Lc, preventing the intermediate glass 20Lc from collapsing to the outdoor side in the event of an outdoor fire. Also, this configuration allows the heated foaming material 345M to foam on the indoor side of the indoor glass 20Lb, preventing the indoor glass 20Lb from collapsing to the indoor side in the event of an outdoor fire.

[0152] In addition, the heated foaming material 345M expands in the event of a fire on the outdoor side, thereby covering the heat insulating sheet 3492L made of a heat insulating sealant and provided at the rising portion of the glass holding groove 114Lh on the indoor side, and making it possible to prevent the heat insulating sheet 3492L from catching fire.

[0153] Next, a fifteenth embodiment of the present disclosure will be described. In the fifteenth embodiment, the position of the heated foaming material 345N in the projection direction is different from the position of the heated foaming material 345L in the projection direction in the thirteenth embodiment. Other configurations are the same as those in the thirteenth embodiment, and therefore the same components are denoted by the same reference numerals and will not be described again.

[0154] As shown in Fig. 24, the heated foaming material 345N is disposed in the glass holding groove 114Lh at a position that straddles and faces the edge of the intermediate glass 20Lc and the edge of the exterior glass 20La. The indoor-side end of the heated foaming material 345N is positioned to coincide with the indoor-side surface of the intermediate glass 20Lc. The outdoor-side end of the heated foaming material 345N is positioned to coincide with the outdoor-side surface of the exterior glass 20La.

[0155] This makes it possible to obtain the same effects as those obtained in the third embodiment. That is, in the event of a fire on the indoor side, the foamed heated foaming material 345N can hold the exterior glass 20La and the intermediate glass 20Lc. Furthermore, because the heated foaming material 345N is not positioned opposite the edge of the interior glass 20Lb, in the event of a fire on the indoor side, the interior glass 20Lb can be quickly removed. This makes it possible to prevent the intermediate glass 20Lc from cracking due to heat buildup.

[0156] Furthermore, because the heat-generating foaming material 345N is positioned in this manner, in the event of a fire on the indoor side, the heat-generating foaming material 345N foams and expands in volume, separating the intermediate glass 20Lc, the outdoor glass 20La, and the spacer 20Ld. This prevents the expansion and distortion of the indoor glass 20Lb from affecting the intermediate glass 20Lc and the outdoor glass 20La, preventing cracks in the intermediate glass 20Lc and the outdoor glass 20La.

[0157] Furthermore, because the heat-generating foaming material 345N is positioned in this manner, in the event of a fire on the indoor side, the heat-generating foaming material 345N foams and expands in volume, separating the intermediate glass 20Lc, the exterior glass 20La, and the spacer 20Ld. This minimizes the transfer of heat received by the intermediate glass 20Lc to the exterior glass 20La. As a result, it is possible to prevent thermal cracking of the exterior glass 20La.

[0158] Furthermore, because the heated foam material 345N is arranged in this manner, in the event of a fire on the indoor side, the heated foam material 345N foams and expands in volume, making it possible to hold the intermediate glass 20Lc and the outdoor glass 20La to the vertical frame 400L.

[0159] In addition, since the heated foaming material 345N is positioned between the edges of the intermediate glass 20Lc and the exterior glass 20La and the glass retaining fittings 70L, the foaming of the heated foaming material 345N makes it possible to prevent contact between the heated glass retaining fittings 70L and the intermediate glass 20Lc and the exterior glass 20La in the event of a fire, thereby preventing thermal cracking of these panes of glass.

[0160] Next, a sixteenth embodiment of the present disclosure will be described. In the sixteenth embodiment, the length of the heated foaming material 345O in the projection direction is different from the length of the heated foaming material 345N in the projection direction of the fifteenth embodiment. Other configurations are the same as those of the fifteenth embodiment, and therefore the same components are denoted by the same reference numerals and will not be described again.

[0161] 25, the heated foaming material 345O is disposed in the glass holding groove 114Lh at a position that faces and straddles the edge of the intermediate glass 20Lc and the edge of the exterior glass 20La. The exterior end of the heated foaming material 445O is located outside the exterior surface of the exterior glass 20La. The interior end of the heated foaming material 345O extends interior-side beyond a position that coincides with the interior-side surface of the intermediate glass 20Lc, and extends to a position that faces the space between the interior glass 20Lb and the intermediate glass 20Lc.

[0162] In addition to the effects of the fifteenth embodiment, this configuration allows the heated foaming material 345O to foam on the indoor side of the intermediate glass 20Lc, preventing the intermediate glass 20Lc from collapsing toward the indoor side in the event of a fire on the indoor side. Also, this configuration allows the heated foaming material 345O to foam on the outdoor side of the outdoor glass 20La, preventing the outdoor glass 20La from collapsing toward the outdoor side in the event of a fire on the indoor side.

[0163] Although a preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and can be modified as appropriate.

[0164] For example, the building materials are not limited to the configurations described in the above embodiments. For example, the triple glazing may be formed in a rectangular shape, and the heated foaming material may be positioned at least opposite the upper edge of the triple glazing. This allows the middle glass, interior glass, exterior glass, and spacer to be separated quickly at the upper end of the glass in the event of a fire. [Explanation of symbols]

[0165] 2 Frame, 30 Frame, 35 Face material, 35a Outdoor glass, 35b Indoor glass, 35c Intermediate glass, Heat-foaming material 315, 325, 335, 345, 415, 425, 435, 445, 3191L, 3291L, 3491L, 3492L Heat insulation sheet

Claims

1. a frame or a stile; a triple glazing unit disposed on the frame or frame body, the triple glazing unit comprising an exterior glass, an interior glass disposed on the interior side with a gap from the exterior glass, and an intermediate glass disposed between the exterior glass and the interior glass; A heated foam material is disposed between the frame or frame body and the edge of the triple glazing. The heat-foaming material is arranged in a position that spans and faces at least the edge of the intermediate glass and the edge of either the exterior glass or the interior glass.

2. The building fixture described in claim 1 is arranged so that the heated foaming material extends from a position facing the edge of the exterior glass, beyond a position facing the edge of the intermediate glass, and to a position facing the space between the interior glass and the intermediate glass.

3. The fixture according to claim 1, wherein the heated foaming material is arranged to extend from a position facing the edge of the intermediate glass beyond a position facing across the edge of the exterior glass toward the exterior side.

4. The building fixture described in claim 1 is arranged so that the heated foaming material extends from a position facing the edge of the interior glass, beyond a position facing the edge of the intermediate glass, and to a position facing the space between the exterior glass and the intermediate glass.

5. The fixture according to claim 1, wherein the heated foaming material is arranged to extend from a position facing the edge of the intermediate glass to a position facing across the edge of the interior glass toward the interior side.

6. The triple glass is formed into a rectangular shape, The building material according to any one of claims 1 to 5, wherein the heat-foaming material is arranged at a position facing at least the upper edge of the triple glazing.

7. The fitting according to any one of claims 1 to 5, wherein a heat insulating sheet is disposed in a position facing the interior facing surface of the triple glass.

8. The triple glass is a fitting according to any one of claims 1 to 5, which constitutes a shoji screen made of a composite sash of aluminum and resin.

Images