JP2015209632A - Resin window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin window capable of preventing slipping-out of a flame in a fire, by restraining a crack by heat of a double-glazing window.SOLUTION: A resin window 12 is constituted for supporting double-glazing 18 on the inside of a frame body 16 formed of resin upper frame 16a, lower frame 16b and left-right jambs 16c, and the double glazing 18 is supported in its outer peripheral end part with a clearance between an inner surface 24c of a bottom wall part 24a of an opening groove 24 and itself on the inside of the opening groove 24 provided in a frame body 16, and while providing a thermal expansion member 42 expanding when heated on the outer surface 24b side of the bottom wall part 24a of the opening groove 24 in the lower frame 16b, the thermal expansion member is not provided between the inner surface 24c of the bottom wall part 24a of the opening groove 24 and a lower end surface 18b of the double glazing 18.

Description

  The present invention relates to a resin window in which a multilayer glass is supported inside a resin frame.

  In windows of buildings such as houses and stores, resin windows, which are furniture that can secure heat insulation performance and suppress dew condensation, are widely used by supporting a multi-layer glass inside a resin frame. The resin window is required to have a predetermined fire prevention performance by laws and regulations from the viewpoint of disaster prevention.

  For example, in Patent Document 1, in a resin window in which a multi-layer glass is inserted and supported in an opening groove of a resin-made frame body, between the end surface of the multi-layer glass and the inner surface of the bottom wall portion of the opening groove of the frame body. Discloses a fireproof structure provided with a thermally expandable member such as a foamable caulking material and a foamable flame barrier material. With this fireproof structure, when the multi-layer glass window is heated in the event of a fire or the like, the space between the end surface of the multi-layer glass and the bottom wall portion of the opening groove of the frame is closed by the thermally expandable member. For this reason, it can prevent that the through-hole which connects indoor and outdoor space to a frame is formed, and can prevent the flame omission between indoors and outdoors of a multilayer glass window.

JP2011-6874A

  By the way, in the said prior art, when a multilayer glass window is heated, a thermally expansible member expand | swells rapidly between the lower end surface of a multilayer glass, and the bottom wall part of the opening groove | channel of a frame. Therefore, a temperature difference is generated between the glass center portion that becomes high temperature by heating with a flame or the like and the glass end portion that is insulated and thermally insulated by the thermally expandable member. In particular, in the vicinity of the lower end portion of the multi-layer glass, the temperature hardly rises compared to the upper end portion, and the temperature difference becomes larger. When such a temperature difference occurs, not only the heated glass plate exposed to flames, but also the non-heated glass plate cracks due to the tensile stress caused by the temperature difference (thermal cracking), and the multi-layer glass window There is a concern that the flame penetrates.

  Moreover, a multi-layer glass window having a configuration other than the configuration of Patent Document 1 in which the multi-layer glass is composed of a mesh glass and a heat-resistant glass, for example, one of the multi-layer glasses is made of a heat-shielding glass or a float glass. In the double-glazed glass window made of non-heat-resistant glass such as the above, the occurrence of the above-described thermal crack becomes more remarkable. As a factor, if the thermal expansion member foams and covers the vicinity of the lower end portion of the multi-layer glass with the temperature difference occurring, it is difficult for the lower end portion covered with the thermal expansion member to propagate heat. Because.

  The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides a resin window capable of suppressing thermal cracking due to a temperature difference of a glass plate of a multi-layer glass window and preventing a flame from being lost such as a fire. The purpose is to do.

  The resin window according to the present invention is a resin window in which a multi-layer glass is supported inside a frame body formed of a resin upper frame, a lower frame, and left and right vertical frames. An end portion is supported inside the opening groove provided in the frame body with a gap between the inner surface of the bottom wall portion of the opening groove, and the lower frame expands when heated. While the member is provided on the outer surface side of the bottom wall portion of the opening groove, the thermally expandable member is not provided between the inner surface of the bottom wall portion of the opening groove and the lower end surface of the multilayer glass. And

  According to such a configuration, when the multi-layer glass window receives heat from a fire or the like, the bottom wall of the opening groove is caused by the flame or heat that penetrates the heating side finding surface of the lower frame and enters the opening groove. After the portion is melted or at the same time as the melting of the bottom wall portion, the thermally expandable member expands. For this reason, immediately after the lower frame is heated, the space between the lower end surface of the multilayer glass and the bottom wall portion of the opening groove is closed by the thermally expandable member, and the vicinity of the lower end surface of the multilayer glass is insulated. The center part and the lower end part of the glass plate which comprises a multilayer glass are heated substantially equally, and the time which a temperature rises is ensured. Thereby, the temperature difference produced between the center part and the lower end part of the glass plate can be minimized, the occurrence of thermal cracking of the glass plate due to this temperature difference is prevented, and the indoor and outdoor directions of the multi-layer glass window Can prevent the flame from coming off. Moreover, after the bottom wall portion of the opening groove has melted to some extent, the thermally expandable member disposed on the outer surface side of the bottom wall portion of the opening groove expands, and the lower end surface of the multilayer glass and the bottom wall portion of the opening groove Block the space between them. Due to the flame shielding effect of the thermally expandable member, it is possible to prevent the formation of a through-hole that penetrates the lower frame in the indoor / outdoor direction, thereby preventing the flame from coming off.

  In the resin window according to the present invention, the thermal expansion member may be provided between the upper frame and at least the inner surface of the bottom wall portion of the opening groove and the upper end surface of the multilayer glass. Then, when the multi-layer glass window receives heat from a fire or the like, the thermal expansion member quickly expands due to the flame or heat that has melted the heating side finding surface and entered the opening groove in the upper frame, and the multi-layer glass The space between the upper end surface of the opening and the bottom wall portion of the opening groove is closed. As a result, it is possible to prevent the flame from being lost in the indoor / outdoor space of the upper frame.

  In the resin window according to the present invention, the lower frame has an internal space having a hollow cross-sectional shape on the outer surface side of the bottom wall portion of the opening groove, and the internal space is made of a nonflammable or flame-retardant material. The formed reinforcing material may be disposed, and in the lower frame, the thermally expandable member may be provided on the upper surface of the reinforcing material facing the outer surface of the bottom wall portion of the opening groove. Then, since the back surface side of the thermally expandable member is covered with the reinforcing material, it is prevented from falling off when the bottom wall portion of the opening groove is melted, and is reliably expanded toward the glass side.

  In the resin window according to the present invention, the multi-layer glass has a lower end supported on an inner surface of a bottom wall portion of an opening groove provided in the lower frame through a setting block, and at least the setting block. A heat transfer member may be interposed between the lower end surface of the multilayer glass. Thereby, when a multilayer glass window receives heat, such as a fire, the temperature of the lower end part of a multilayer glass can be raised more rapidly by the heat-transfer effect | action of a heat-transfer member. Thereby, generation | occurrence | production of the temperature difference between the center part and edge part of a glass plate can be suppressed more reliably, and the thermal crack of a glass plate can be prevented more reliably.

  In the resin window according to the present invention, the multilayer glass is composed of a plurality of glass plates, one of which is composed of meshed glass, and the lower end side of a glass plate that is not other meshed glass. The heat transfer member may be attached to a portion that is the entire length and faces the inner surface of the bottom wall portion of the opening groove. By providing the heat transfer member over the entire length of the lower end side of the glass plate that is not meshed glass, even if cracks enter the glass from the lower end due to thermal cracking, it is supported so as not to be misaligned. Can play a role.

  According to the present invention, it is possible to minimize the temperature difference generated between the central portion and the lower end portion of the glass plate constituting the multilayer glass, and to prevent the occurrence of thermal cracking of the glass plate. It can prevent the escape of the flame in the indoor and outdoor direction. Moreover, the space between the lower end surface of the multi-layer glass and the bottom wall of the opening groove is closed with a thermally expandable member to prevent the occurrence of a through-hole that penetrates the interior and exterior, It is possible to prevent the loss of flame.

FIG. 1 is a longitudinal sectional view of a resin window according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the resin window shown in FIG. FIG. 3 is an enlarged longitudinal sectional view showing a configuration example in which a heat transfer member is provided on the lower frame of the resin window shown in FIG. 1.

  Hereinafter, preferred embodiments of the resin window according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view of a resin window 12 according to an embodiment of the present invention, and FIG. 2 is a transverse sectional view of the resin window 12 shown in FIG.

  As shown in FIG. 1 and FIG. 2, the resin window 12 is a multilayer having a frame 16 fixed to the opening 14 a of the housing 14 of the building, and a multilayer glass 18 attached to the inside of the frame 16. It is a glass window. In this embodiment, the resin window which consists of a structure which applied the fire prevention structure 10 with respect to the fitting of the fitting window which fixed the multilayer glass 18 inside the frame 16 is illustrated.

  The multi-layer glass 18 has a two-layer structure in which a pair of glass plates 22 and 23 are arranged facing each other with a spacer 20 therebetween. In the case of this embodiment, the glass plate 22 arranged on the outdoor side is made of netted glass, and the glass plate 23 arranged on the indoor side is made of heat shielding glass (Low-E glass). The glass plate 22 is a plate glass having fire resistance that does not collapse even when heated by a fire or the like. The glass plate 23 has lower fire resistance than the glass plate 22 and may be float glass. The positional relationship between the indoor and outdoor glass plates 22 and 23 may be exchanged. In addition, the term “multi-layer” is a concept including a structure of three or more layers. For example, the multi-layer glass 18 may have a three-layer structure such as triple glass.

  The frame body 16 has a rectangular opening formed by quadrangling an upper frame 16a, a lower frame 16b, and left and right vertical frames 16c and 16c. The upper frame 16a, the lower frame 16b, and the vertical frame 16c are extruded shapes of resin such as vinyl chloride resin (PVC). The upper frame 16a, the lower frame 16b, and the vertical frame 16c are formed by the same frame member cut at a predetermined length, and the cross-sectional shapes thereof are the same. The frame body 16 is configured such that end portions of the upper frame 16a, the lower frame 16b, and the vertical frame 16c, which are cut at 45 degrees, are appropriately abutted and joined.

  As shown in FIG. 1, the lower frame 16 b has an opening groove 24 in which the outer peripheral end (lower end) of the multilayer glass 18 is disposed. A protruding portion 26 is provided in a portion of the opening groove 24 on the indoor side, and an attachment groove 30 for attaching the pressing edge 28 is provided in a portion of the opening groove 24 on the outdoor side. A draining portion 32 is provided at a position lower than the mounting groove 30 by one step on the outdoor side. On the outer surface (lower surface) 24b side of the bottom wall portion 24a of the opening groove 24, an internal space 34 having a hollow cross-sectional shape is formed. Since the upper frame 16a and the vertical frame 16c have the same cross-sectional shape as the lower frame 16b as described above, the upper frame 16a and the vertical frame 16c have the opening groove 24, the protruding portion 26, the pushing edge 28, the mounting groove 30, the draining portion 32, and the internal space 34, respectively ( 1 and 2).

  In the frame 16, the multilayer glass 18 is held between the protrusion 26 and the pressing edge 28 by mounting the pressing edge 28 on the outdoor side after the multilayer glass 18 is mounted in the opening groove 24. A pair of tight materials 35 a and 35 b abut on both surfaces of the outer peripheral end portion of the multilayer glass 18.

  Here, in the opening groove 24 of the lower frame 16b, the lower end surface 18b of the multilayer glass 18 is supported with a gap by the setting block 36 with respect to the inner surface (upper surface) 24c of the bottom wall portion 24a. The setting block 36 has a gate-shaped cross-sectional shape, and has, for example, an upper and lower two-layer structure of a rubber material portion 36a and a metal material portion 36b. The metal material portion 36b is made of aluminum, for example. Therefore, even when the setting block 36 is heated and the upper rubber material portion 36a is melted, the lower metal material portion 36b remains, so that the lower end surface 18b of the multi-layer glass 18 is continuously supported, and the upper frame 16a and Generation | occurrence | production of the through-hole which the outer peripheral edge part (upper side edge part) of the multilayer glass 18 isolate | separates and generate | occur | produces can be suppressed.

  In the opening groove 24 of the upper frame 16a and the vertical frame 16c, the upper end surface 18a and the vertical end surface 18c of the multilayer glass 18 are supported with a gap by the setting block 37 with respect to the inner surface 24c of the bottom wall portion 24a. The setting block 37 installed in the upper frame 16a and the vertical frame 16c has a rectangular cross-sectional shape and is formed of, for example, a rubber material. Since the setting block 37 of the upper frame 16a does not need to have a positioning action of the multilayer glass 18, it may be separated from the upper end surface 18a of the multilayer glass 18 (see FIG. 1).

  In the case of the present embodiment, the setting blocks 36 and 37 have a width dimension of about 50 mm, and for example, about 2 to 4 setting blocks are installed along the longitudinal direction of each frame 16a to 16c.

  In the opening groove 24 of the lower frame 16b, a drop-off preventing metal fitting 38 having an L-shaped cross-sectional shape is provided. The drop-off prevention metal fitting 38 is fixed to the reinforcing member 40 with screws 39 (see FIG. 3). The drop-off prevention metal fitting 38 stands up against the outdoor side surface of the multilayer glass 18 and prevents the multilayer glass 18 from falling to the outdoor side. In the case of this embodiment, the drop-off prevention metal fitting 38 has a width dimension of about 50 mm, and for example, about 1 to 3 pieces are installed along the longitudinal direction of the lower frame 16b.

  Next, the structure and effect of the resin window 12 according to the present embodiment will be described.

  A reinforcing member 40 extending in the longitudinal direction is provided in the internal space 34 of the lower frame 16b. The reinforcing member 40 is formed of a thin metal plate formed into a substantially U-shaped cross-sectional shape. The reinforcing member 40 includes an upper plate 40a and a pair of side plates 40b and 40c protruding from both sides in the prospective direction of the upper plate 40a. On the upper surface of the upper plate 40a facing the outer surface 24b of the bottom wall 24a of the opening groove 24, a pair of recesses 40d are provided in the prospective direction, and in each recess 40d, a thermally expandable member 42 is provided in the longitudinal direction of the lower frame 16b. It is arranged to extend. In the case of this embodiment, the thermally expandable member 42 is in contact with the outer surface 24 b of the bottom wall portion 24 a of the opening groove 24. The heat-expandable member 42 is a material that expands when heated, for example, a heat-foamable material mainly composed of expandable graphite.

  The inner space 34 of the upper frame 16a and the vertical frame 16c is provided with a reinforcing material 44 formed by molding a molded board (medium density fiber board) made of wood fiber called MDF (medium density fiberboard) as a raw material. ing. The MDF constituting the reinforcing member 44 has flame retardancy or nonflammability that does not burn away due to a fire or the like. In the upper frame 16 a and the vertical frame 16 c, a thermally expandable member 46 is disposed on the inner surface 24 c of the bottom wall portion 24 a of the opening groove 24. The thermally expandable member 46 is a heated foam material mainly composed of expandable graphite, for example, a material that expands when heated. In the upper frame 16a, in addition to the inner surface 24c of the bottom wall portion 24a, on the outer surface 24b side, for example, a thermally expandable member 46 (see a two-dot chain line in FIG. 1) is provided by being attached to the lower surface of the reinforcing member 44. May be. Further, in the vertical frame 16c, in addition to the inner surface 24c of the bottom wall portion 24a or in place of the inner surface 24c of the bottom wall portion 24a, it is attached to the outer surface 24b side of the bottom wall portion 24a, for example, on the side surface of the reinforcing member 44. An inflatable member 46 (see a two-dot chain line in FIG. 2) may be provided. In the upper frame 16a and the vertical frame 16c, instead of the reinforcing material 44, a reinforcing material 40 formed of a metal plate may be used similarly to the lower frame 16b.

  As described above, according to the resin window 12 according to the present embodiment, the setting blocks 36 and 37 are disposed between the inside of the opening groove 24 of the resin frame 16 and the inner surface 24c of the bottom wall portion 24a of the opening groove 24. In the resin window 12 that supports the outer peripheral end of the multilayer glass 18 through a gap, the lower frame 16b is provided with the thermally expandable member 42 on the outer surface 24b side of the bottom wall 24a of the opening groove 24, while the opening groove Between the inner surface 24c of the bottom wall part 24a of 24 and the lower end surface 18b of the multilayer glass 18, it has the fire prevention structure 10 which does not provide a thermally expansible member. In other words, in the lower frame 16b, the thermally expandable member is provided only on the outer surface 24b side of the bottom wall portion 24a of the opening groove 24.

  Therefore, for example, when the resin window 12 receives heat such as a fire generated outside the room, the bottom frame 24b melts the pressing edge 28 and the bottom wall portion 24a is melted by the flame or heat that penetrates, or the bottom wall 16b. The thermally expandable member 42 expands substantially simultaneously with the melting of the portion 24a. In other words, as compared with the configuration in which the thermally expandable member is disposed in the space between the lower end surface 18b of the multilayer glass 18 and the bottom wall portion 24a of the opening groove 24 as in the conventional technique described above, the thermally expandable member 42. The expansion timing of is delayed. In other words, in the fire prevention structure 10 of the resin window 12, the space between the lower end surface 18b of the multi-layer glass 18 and the bottom wall portion 24a of the opening groove 24 is thermally expanded until it is heated to some extent by flame or heat. 42 does not expand and does not block the space between the lower end surface 18b and the bottom wall portion 24a. For this reason, the space is closed immediately after the lower frame 16b is heated, and the vicinity of the lower end surface 18b of the multi-layer glass 18 can be avoided from being insulated, and the central portion and the lower end portion of the glass plate 23 are substantially even. When heated, the temperature rises. Thereby, the temperature difference between the center part and the lower end part of the glass plate 23 can be minimized, the occurrence of thermal cracking of the glass plate 23 due to this temperature difference is prevented, and the interior of the multilayer glass 18 is prevented. It can prevent the flame from coming out.

  In addition, after the bottom wall portion 24a of the opening groove 24 has melted to some extent, the thermally expandable member 42 disposed on the outer surface 24b side expands, and the lower end surface 18b of the multilayer glass 18 and the bottom wall portion 24a of the opening groove 24 are expanded. The space between the reinforcing material 40 is closed. Due to the flame shielding effect of the thermally expansible member 42, the occurrence of a through-hole that penetrates from the pressing edge 28 to the protruding portion 26 along the lower end surface 18b of the multi-layer glass 18 is prevented, and in the indoor and outdoor spaces of the lower frame 16b Flame escape can be prevented.

  According to the resin window 12 according to the present embodiment, the upper frame 16 a is provided with the thermally expandable member 46 at least between the inner surface 24 c of the bottom wall portion 24 a of the opening groove 24 and the upper end surface 18 a of the multilayer glass 18. Yes. For this reason, when the resin window 12 receives heat such as fire, the thermal expansion member 46 quickly expands due to the flame or heat penetrating the pressing edge 28 in the upper frame 16a, and the upper end surface 18a and the bottom wall of the multilayer glass 18 are expanded. The space between the portion 24a (the reinforcing member 44) is closed. As a result, it is possible to prevent the flame from dropping out in the indoor / outdoor space of the upper frame 16a.

  As described above, in the upper frame 16a, the thermally expandable member 46 can be installed in the space between the upper end surface 18a of the multilayer glass 18 and the inner surface 24c of the bottom wall portion 24a of the opening groove 24, and the space can be quickly closed. It has a simple structure. Normally, when the resin window 12 receives heat such as a fire, the temperature rapidly rises on the upper frame 16a side above, so the heat of the glass plate 23 due to the temperature difference that occurs in the lower frame 16b described above. Cracks are unlikely to occur. Therefore, it is preferable that the upper frame 16a has a configuration in which the thermally expandable member 46 can be expanded more quickly to prevent the escape of the flame more reliably. On the other hand, in the lower frame 16b below the resin window 12, the temperature rise at the lower end of the multi-layer glass 18 tends to be slower than that at the center or upper end even when receiving heat such as a fire. Therefore, in order to prevent thermal cracking due to the temperature difference as described above, in the fire prevention structure 10 of the resin window 12, as described above, the expansion of the thermally expandable member 42 is delayed until the temperature of the glass plate 23 rises substantially uniformly. The structure to be made is provided.

  In the resin window 12, the lower frame 16 b is provided with a reinforcing material 40 in a hollow inner space 34 formed on the outer surface 24 b side of the bottom wall portion 24 a of the opening groove 24, and the upper surface of the reinforcing material 40 is thermally expanded. A sex member 42 is provided. Accordingly, since the back surface side of the thermally expandable member 42 is covered with the metal reinforcing material 40, the thermally expandable member 42 falls off to the bottom of the internal space 34 when the bottom wall portion 24a of the opening groove 24 is melted. Can be prevented, and it is surely expanded toward the double-glazed glass 18 side.

  As shown in FIG. 3, in the lower frame 16 b, a heat transfer member 50 may be interposed between the setting block 36 and the lower end surface 18 b of the multilayer glass 18. The heat transfer member 50 is a thin metal plate having an L-shaped cross section, for example, a stainless steel plate. The heat transfer member 50 is provided over substantially the entire length of the lower end side of the glass plate 23 so as to cover the corner portion of the glass plate 23 on the indoor side, and is disposed on both sides of the portion facing the inner surface 24c of the bottom wall portion 24a of the opening groove 24. It is bonded and fixed with a tape or an adhesive, and is interposed between the setting block 36 and the lower end surface 18b. By providing the heat transfer member 50, when the resin window 12 receives heat such as a fire, the lower end portion of the multi-layer glass 18 can be raised in temperature more quickly by the heat transfer action of the heat transfer member 50. Thereby, generation | occurrence | production of the temperature difference between the center part and edge part of the above-mentioned glass plate 23 can be suppressed more reliably, and the thermal crack of the glass plate 23 can be prevented more reliably.

  Moreover, since the rubber material part 36a of the upper part of the setting block 36 with heat insulation is softened at the time of a fire, there exists a possibility of wrapping the lower end side of the glass plate 22 comprised with thermal insulation glass or float glass. Therefore, the bottom surface side of the L-shaped heat transfer member 50 has a role of preventing the problem that the lower end side of the glass plate 22 is wrapped with the softened rubber material portion 36a. Furthermore, even if the heat transfer member 50 is provided over the entire lower end side of the glass plate 23 that is not meshed glass, even if cracks enter the glass plate 23 upward from the lower end due to thermal cracking, the surface It can play a role to support not to shift.

  It is preferable that the heat transfer member 50 has a shape and an arrangement that do not come into contact with the glass plate 22 that is netted glass. This is because if the heat transfer member 50, which is a metal plate, is in contact with the steel wire of the glass plate 22, there is a concern that corrosion will occur. Furthermore, it is preferable that the heat transfer member 50 does not completely cover the gap between the pair of glass plates 22 and 23 constituting the multilayer glass 18. This is because if the gap is completely covered by the heat transfer member 50, there is a concern that condensation occurs in the internal space of the multilayer glass 18. Therefore, in the configuration shown in FIG. 3, the heat transfer member 50 is set to a prospective dimension that covers from the lower end surface of the glass plate 23 to the middle of the spacer 20. The heat transfer member 50 may be installed on the upper frame 16a and the vertical frame 16c.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

  For example, in the said embodiment, although the fitting window which fixed the multilayer glass 18 to the inner side of the frame 16 was illustrated as the resin window 12, this invention shows the shoji which assembled the multilayer glass with respect to the frame. The present invention can also be applied to a door / window fitting that can be opened and closed.

  DESCRIPTION OF SYMBOLS 10 Fireproof structure of double-glazed glass window, 12 Resin window, 14 Frame, 16 Frame, 16a Upper frame, 16b Lower frame, 16c Vertical frame, 18 Double-glazed glass, 18a Upper end surface, 18b Lower end surface, 18c Vertical end surface, 20 Spacer, 22, 23 Glass plate, 24 Opening groove, 24a Bottom wall part, 24b Outer surface, 24c Inner surface, 26 Protruding part, 28 Pushing edge, 34 Internal space, 36, 37 Setting block, 38 Fall-off prevention bracket, 40, 44 Reinforcing material , 42, 46 Thermally expandable member, 50 Heat transfer member

Claims (5)

A resin window that supports a multilayer glass inside a frame formed of a resin upper frame, a lower frame, and left and right vertical frames,
The multi-layer glass is supported with a gap between the outer peripheral end portion of the opening groove provided in the frame body and the inner surface of the bottom wall portion of the opening groove,
In the lower frame, a thermally expandable member that expands when heated is provided on the outer surface side of the bottom wall portion of the opening groove, and between the inner surface of the bottom wall portion of the opening groove and the lower end surface of the multilayer glass. The resin window is characterized in that the thermal expansion member is not provided. The resin window according to claim 1,
In the upper frame, the thermally expandable member is provided at least between the inner surface of the bottom wall portion of the opening groove and the upper end surface of the multilayer glass. In the resin window according to claim 1 or 2,
The lower frame has an internal space having a hollow cross-sectional shape on the outer surface side of the bottom wall portion of the opening groove, and a reinforcing material formed of a noncombustible or flame retardant material is disposed in the internal space. And
In the lower frame, the thermally expandable member is provided on the upper surface of the reinforcing material facing the outer surface of the bottom wall portion of the opening groove. In the resin window of any one of Claims 1-3,
The multi-layer glass is supported at its lower end surface via the setting block with respect to the inner surface of the bottom wall portion of the opening groove provided in the lower frame, and at least the setting block and the lower end surface of the multi-layer glass A resin window characterized in that a heat transfer member is interposed between the two. In the resin window according to claim 4,
The multi-layer glass is composed of a plurality of glass plates, one of which is composed of meshed glass, and is substantially the entire length of the lower end side of the glass plate that is not the other meshed glass. A resin window, wherein the heat transfer member is attached to a portion facing the inner surface of the bottom wall portion.

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