JP2011006874A - Fire-preventive structure of double-glazed window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the leakage of a flame from occurring on the periphery of a window frame or a window stile/rail and double glazing and prevent the occurrence of falling of wire-reinforced glass to the utmost, so as to maintain fire protecting performance specified in the Building Standard Law, the Building Standard Law enforcement ordinance, etc., even when heating is applied from the outdoor or indoor side of the building; and to stabilize the double glazing over a long period of time by making constructibility proper.SOLUTION: A metal angle material 17 and a metal glass coming-off stopper 24 are provided in the state of facing each other in the indoor and outdoor directions, in the inner peripheral groove portion 10 of the window frame 2 (or the window stile/rail) for mounting the double glazing 3. An outer peripheral end of the double glazing is positioned between the metal angle material and the metal glass coming-off stopper. An expandable caulking material 19 is interposed between a bottom surface 10a in the inner peripheral groove portion of the window frame (or the window stile/rail) and an outer peripheral end surface 3c of the double glazing. A heat-resistant tape 18 is interposed between the metal angle material and the double glazing.

Description

  The present invention prevents the escape of a flame generated around a double-glazed glass by heating from the outside or the indoor side of a double-glazed window provided in an opening of a building in the event of a fire in a building such as a house or office It is related with the fire prevention structure of the multilayer glass window which was made to do.

  Buildings are being made non-combustible from the viewpoint of disaster prevention. In particular, in order to avoid burning from the glass window in the event of a fire, prevent burning from firing from the outside of the glass window or ignition by radiant heat, etc. Has become an important issue.

When fire prevention measures are taken on glass windows, fire prevention performance against flames is stipulated by the Building Standards Act and the construction ordinance.
For example, in a three-story wooden house, when a glass window fire test is performed, a gas burner or the like is used to keep a predetermined distance away from the radiated flame directly touching the window glass surface, and the heating temperature is ISO. Heating is started when heating from the inside or outside of the room so that the standard heating temperature curve specified in the above (the heating temperature after 20 minutes reaches 781 ° C according to the standard heating temperature curve) After that, the condition that it does not spread to the non-heated side for 20 minutes, specifically,
(1) No flame eruption that continues for more than 10 seconds to the non-heating side
(2) No flame that continues for more than 10 seconds on the non-heated surface
(3) It is necessary to satisfy the three conditions at the same time that no damage such as cracks through which the flame passes and no gap occur.

2. Description of the Related Art Conventionally, in a glass window of a building, for example, two sheets of glass, that is, float glass and netted glass, are arranged in a window frame (sash frame) through a sealed space made of aluminum spacers. ) And fitted with butyl rubber between the inner surface between the inner and outer glass and the spacer, and a silicone rubber sealant between the inner periphery of the window frame and the outer periphery of the double glazing. However, in this case, since the sealing material is composed of a hydrocarbon system that ignites at about 400 ° C., flammable gas generated from the sealing material due to high heat during a fire is generated between the plate glasses. It accumulates in the enclosed space and easily ignites, and the flame further heats the sealing material and ignites, and this ignition causes the plate glass to be locally heated and cracked. A phenomenon that can be seen, there is a need to prevent this.
For this reason, by providing a flame-retardant or non-flammable seal material inside the seal material, the fireproof performance is improved (see Patent Document 1).

  However, although the multilayer glass described in Patent Document 1 has improved fire prevention performance, it cannot completely prevent the sealing material from igniting, and even if a fire prevention structure is configured using the multilayer glass. It was difficult to maintain the fire protection performance stipulated in the Building Standards Law and the Construction Order.

That is, for example, when a glass with a net is placed on the outside and a float glass with a thickness of about 3 mm is placed on the outside and heated from the outside to conduct a fire test based on the Building Standards Act, etc. As the temperature rises due to the radiant heat of the heating furnace, cracks occur in the indoor float glass, and then the seal material ignites spontaneously and continues to burn, and the window frame is made of synthetic resin such as vinyl chloride resin. In the case of molding, the fire sometimes burned out to the indoor resin on the non-heated surface side.
In addition, in order to prevent breakage of the float glass, when the glass on the indoor side is made of glass that does not cause cracking, such as heat-resistant tempered glass, the heat-resistant tempered glass remains unbroken and from the non-heated surface side of the meshed glass The radiation of heat will be blocked.
As a result, the temperature of the meshed glass increased and softened, and the meshed glass sometimes collapsed in less than 20 minutes after the start of heating.

  Furthermore, as the fire prevention structure of the glass window, the gap between the fitting part of the window frame and the peripheral edge of the single plate glass is filled with ceramic fiber and a thermally expandable filler together with a fireproof sealant. Inflating the inflatable filler by foaming and holding the plate glass so that it will not be deformed by the expansion pressure, so that the fireproof sealant filled between the window frame and the plate glass is prevented from peeling off. (See Patent Document 2).

However, the fire prevention structure shown in Patent Document 2 has a single plate configuration, and the above problem cannot be solved even when the structure is applied to a double glazing.
Further, in the fire prevention structure shown in Patent Document 2, it is necessary to tightly pack the filler in the gaps on both sides of the glass in order to prevent the fire prevention glass plate from wobbling. Therefore, the aluminum spacer is deformed or dropped as the temperature rises after the start of heating, and the wobble prevention effect cannot be maintained for a long time.
Furthermore, in the fireproof structure shown in Patent Document 2, it is necessary to fill the gap between the window frame mounting groove and the fireproof glass plate with a filler, and then seal the opening of the gap with a fireproof sealant. There was a problem.

JP 7-237941 A JP 7-229372 A

  In view of the above-mentioned present situation, the present invention provides a window frame or window sill so that the fire prevention performance prescribed in the Building Standards Act and the construction ordinance can be maintained even by heating from the outside or inside of the building. In addition, it is possible to prevent the loss of flame generated around the multi-layer glass and the occurrence of the collapse of the glass with the net as much as possible, the workability is good, and the multi-layer glass is stable over a long period of time. An object of the present invention is to provide a fire prevention structure for a double-glazed glass window that can be used in a conventional manner.

The above-described problems are solved by the invention having the following configuration, as described in each claim in the section “Claims”.
(1) In a fire prevention structure of a multi-layer glass window in which a multi-layer glass is mounted on a synthetic resin window frame or window sill, a metal frame is formed in the inner peripheral groove portion of the window frame or window sill mounted with the multi-layer glass. An angle member and a metal glass stopper are provided opposite to each other in the indoor / outdoor direction, the outer peripheral edge of the multilayer glass is positioned between the metal angle member and the metal glass stopper, and the inner peripheral groove portion A foamable caulking material is interposed between the bottom surface and the outer peripheral end surface of the multilayer glass, and a heat resistant tape is further interposed between the metal angle member and the multilayer glass.

(2) In the above item (1), a foamable flameproof material mainly composed of foamable graphite is interposed between the foamable caulking material and the bottom surface of the inner peripheral groove portion of the window frame or window ridge.

(3) In the above item (1) or (2), a backup material is interposed between the foamable caulking material and the heat-resistant tape.

(4) In any one of the above items (1) to (3), a metal reinforcing material is provided in the window frame of the fitted window or the window frame of the opening / closing window and the internal space of the window frame, respectively. In addition, a foamable flameproof material mainly composed of expandable graphite is interposed in the gap in the vertical direction or the horizontal direction between the metal reinforcing material and the window frame or window ridge in the internal space. .

(5) In any one of the above items (1) to (4), the foamable caulking material is a foamable silicone sealant.

(6) In any one of the above items (1) to (5), the metal angle member and the metal glass stopper are connected to each other.

(7) In any one of the above items (1) to (6), the metal angle members and the metal glass stoppers are alternately arranged in the longitudinal direction of the members constituting the window frame or the window fence.

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, the metal angle member and the metal glass stopper are provided facing the indoor / outdoor direction in the inner peripheral groove portion of the window frame or the window ridge on which the multilayer glass is mounted, The outer peripheral edge of the multilayer glass is positioned between the metal angle member and the metallic glass stopper, and a foamable caulking material is interposed between the bottom surface in the inner peripheral groove and the outer peripheral edge of the multilayer glass. Furthermore, since a heat-resistant tape is interposed between the metal angle member and the multilayer glass, for example, the multilayer glass has a structure in which the heat-resistant glass is positioned on the outdoor side and the netted glass is positioned on the indoor side. In this case, when the multi-layer glass window is heated from the outdoor side in the event of a fire, even if the heat-resistant glass collapses in about 3 to 4 minutes, the foamable caulking material foams and cures, so that this foamability Caulking material, With the genus made angle member, and clamping the wire glass indoor side, it is possible to prevent the collapse of the glass-filled network for more than at least 20 minutes.
Between the bottom surface of the inner peripheral groove of the window frame and the outer peripheral end surface of the multilayer glass, it can be shielded by heat-resistant tape and metal angle material, preventing visual inspection of the flame from the non-heating side inside the room. can do.

On the other hand, when the multi-layer glass window is heated from the indoor side, the foamable caulking material foams and hardens, thereby holding the multi-layer glass with the foamable coking material, heat-resistant tape and metal angle material. And preventing the collapse of the meshed glass for at least 20 minutes or more, and preventing the breakage of the heat resistant glass by suppressing the heating of the heat resistant glass on the outdoor side by blocking the heat of the meshed glass. The inner flame can be shielded by metal angle material and heat-resistant tape.
Thereby, a multilayer glass window can be maintained at the fireproof performance prescribed | regulated by the Building Standard Law, the construction order, etc.

In addition, since a foaming caulking material is interposed between the bottom surface in the inner peripheral groove portion of the window frame or window sill and the outer peripheral end surface of the multilayer glass, as in the past, the window frame mounting groove and the fire prevention There is no need to seal the opening of the gap with a fireproof sealant after filling the gap between the glass plate and the glass plate, and the workability is improved.
Furthermore, even if the aluminum spacer sandwiched between the glass sheets of the double-layer glass is deformed or dropped, the heat-resistant tape is interposed between the metal angle material and the double-layer glass, preventing the double-layer glass from wobbling. The multilayer glass can be used stably over a long period of time.

  According to invention of Claim 2, the foaming flame-shielding material which has a foaming graphite as a main component is interposed between the foaming caulking material and the bottom face of the inner peripheral groove part of a window frame or a window ridge. Therefore, this foaming flame barrier material foams due to high-temperature heating during a fire, closes the gap formed between the bottom surface of the inner peripheral groove of the window frame and the outer peripheral end surface of the multilayer glass, Distribution can be cut off and the fire protection function can be improved.

  According to the invention described in claim 3, since the backup material is interposed between the foamable caulking material and the heat-resistant tape, the foamable flameproof material has adhesion over a long period of time. In order to prevent water from penetrating around, there is an effect of improving the reliability of the double-glazed seal.

  According to the invention of claim 4, while providing the metal reinforcing material in the internal space of the window frame and the window frame of the window frame of the fitting window or the window frame of the opening and closing window, respectively, in the internal space, High-temperature heating in the event of a fire because a foaming flameproof material mainly composed of expandable graphite is interposed in the vertical or horizontal gap between the metal reinforcement and the window frame or window ridge. The foaming flame barrier material foams, and the gap between the window frame or window fence and the metal reinforcing material in the internal space can be filled with foamed graphite, and the flow of oxygen between the inside and outside of the room is blocked. In addition, the fireproof performance of the window frame or window ridge can be improved.

  According to the fifth aspect of the present invention, since the foamable caulking material is a foamable silicone sealant, the flame barrier effect when the flame is about to escape from the gap between the window frame or window glazing and the multilayer glass. Can be improved satisfactorily.

  According to the invention of claim 6, since the metal angle member and the metal glass stopper are connected to each other, the metal angle member and the metal glass stopper are not separated, and the window frame or It is possible to effectively prevent the double-glazed glass from coming off the windowpane.

According to the seventh aspect of the present invention, since the metal angle members and the metal glass stoppers are alternately arranged in the longitudinal direction of the members constituting the window frame or window rod, the window frame or window It is possible to more effectively prevent the double-glazed glass from coming off the ridge.
The specific contents of the invention are as follows.

It is a perspective view which partially fractures and shows one Embodiment of the fire prevention structure of the multilayer glass window of this invention. It is a principal part expanded vertical sectional view which shows the location where the metal glass slip stopper is not arrange | positioned. FIG. 3 is an enlarged vertical cross-sectional view of a main part showing a portion where a metal glass stopper of line III-III in FIG. 1 is arranged. It is a principal part expanded longitudinal cross-sectional view which shows the holding state of the multilayer glass by metal-made glass slip prevention. It is a disassembled perspective view of metal glass slip prevention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partially cutaway perspective view showing an embodiment of a fire prevention structure for a multi-layer glass window according to the present invention, and FIG. 2 is an enlarged vertical cross-sectional view showing a portion where a metal glass slip-off preventing member is not disposed. FIG. 3 is an enlarged vertical cross-sectional view of a main part showing a portion where a metal glass slip-off preventing member along line III-III in FIG. 1 is arranged.
In the present embodiment, as a multi-layer glass window, a case where a multi-layer glass is mounted on a window frame of a fitting window will be described as an example. The same applies.

As shown in FIG. 1, the double-glazed window of the present invention includes a synthetic resin window frame 2 assembled in an opening of a building housing 1, and a double-glazed glass 3 attached to the window frame 2. It is made up of.
The window frame 2 is composed of a frame main body 2A having a hollow structure attached to the housing 1 of the building, and a pressing edge 2B attached to the frame main body 2A.
For example, as disclosed in JP-A-9-137675, the window frame 2 is a frame member formed from a vinyl chloride resin and a resin composition in which a cellulose-based fine powder prepared from pulverized wood is blended. It is formed by framing in a rectangular shape when viewed from the front.

  As shown in FIG. 2, the frame main body 2 </ b> A is provided with a metal reinforcing material 5 made of a hollow channel member having a substantially rectangular cross section such as iron in the internal space 4. The screw 6 is reinforced by positioning and fixing in the internal space 4.

On the outer periphery of the indoor side A of the frame main body 2A, an attachment piece 7 fixed to the housing 1 of the building with a screw or the like is formed, and on the inner periphery thereof, the indoor side A of the multilayer glass 3 is formed. A support piece 8 for supporting the outer peripheral end 3a is formed, and a fitting groove 9 is formed on the inner periphery of the outdoor side B thereof.
A pressing edge 2B is detachably attached to the fitting groove 9, and the outer peripheral edge of the multilayer glass 3 is formed on the inner periphery of the window frame 2 by the pressing edge 2B and the support piece 8 of the frame body 2A. Is formed with an inner circumferential groove portion 10 to be mounted in a fitted state.

The double-glazed glass 3 is interposed between a glass-containing glass 11 on the indoor side A, a heat-resistant glass 12 on the outdoor side B, and an inner surface on the outer peripheral end side through a sealing material (not shown) made of silicone rubber. The aluminum spacer 13 and the aluminum spacer 13 are joined to form a sealed space 14.
The plate glasses 11 and 12 constituting the multi-layer glass 3 may be appropriately selected such that the indoor side A may be heat resistant glass and the outdoor side B may be meshed glass, or both may be meshed glass or heat resistant glass.

  The outer peripheral ends 3a and 3b of the indoor and outer sides A and B in the multilayer glass 3 are watertight in the inner peripheral groove 10 formed between the support piece 8A and the pressing edge 9 via packings 15 and 16, respectively. The outer peripheral end 3b of the outdoor side B of the multilayer glass 3, that is, the outer peripheral end of the outdoor side B of the heat-resistant glass 11 is directed toward the indoor side A with the packing 16 provided at the tip of the pressing edge 9. It is energized to push in elastically.

In the inner peripheral groove portion 10 of the window frame 2, a metal angle member 17 is continuously provided along the longitudinal direction of the members constituting the window frame 2.
The metal angle member 17 is made of, for example, stainless steel, and has a horizontal piece 17a fixed to the bottom surface 10a of the inner peripheral groove portion 10 of the window frame 2 with a screw or the like, and an end on the indoor side A of the horizontal piece 17a. An extending piece 17b extending at a right angle so as to face the inner surface of the supporting piece portion 8A is formed in an L-shaped cross section, and this extending piece 17b is in contact with the inner surface of the supporting piece portion 8A. It can be assembled.

  A heat-resistant tape 18 is interposed between the outer peripheral end 3 a on the indoor side A in the multilayer glass 3 and the inner surface of the extending piece 17 b in the metal angle member 17. The heat-resistant tape 18 may be made of, for example, ceramic fiber, specifically K′Tape (trademark: manufactured by CGI, UK), Fiber Excel (trademark: manufactured by ITM Co., Ltd.), or the like.

A foamable caulking material 19 is interposed between the bottom surface 10 a of the inner peripheral groove 10 in the window frame 2 and the outer peripheral end surface 3 c of the multilayer glass 3.
The foamable caulking material 19 is made of, for example, a foamable silicone sealant, specifically SE5007, SE5006 (trademark: manufactured by Toray Dow Corning Co., Ltd.) and the like. The gap between the bottom surface 10a of the circumferential groove portion 10 and the outer peripheral end surface 3c of the multilayer glass 3 is closed, and the outer peripheral end surface 3c of the multilayer glass 3 is supported by curing after foaming.

  A backup material 20 having a waterproof property is interposed between the foamable caulking material 19 and the heat-resistant tape 18. The backup material 20 is made of foamed polystyrene such as polyethylene resin or polystyrene resin.

Between the bottom surface 10a of the inner peripheral groove 10 in the window frame 2 and the foamable caulking material 19, a foamable flameproof material 21 mainly composed of foamable graphite, for example, Fibrok (trademark: manufactured by Sekisui Chemical Co., Ltd.). ) Are disposed on the horizontal piece 17 a of the metal angle member 17.
Like the foamable caulking material 19, the foamable flame shield material 21 is foamed by high-temperature heating during a fire, and the bottom surface 10 a of the inner peripheral groove 10 in the window frame 2 and the outer peripheral end surface 3 c of the multilayer glass 3. The gap generated between the two is closed, the flow of oxygen between the inside and outside of the room is blocked, and the fire prevention function is improved.

A metal reinforcing material 5 is provided in the internal space 4 of the frame main body 2A, and a vertical or horizontal gap between the metal reinforcing material 5 and the frame main body 2A in the internal space 4 is provided. Inside, foamable flame shields 22 and 23 mainly composed of expandable graphite are interposed.
These foamable flame barrier materials 22 and 23 are foamed by high-temperature heating at the time of a fire, and block the gap between the metal reinforcing material 5 and the frame main body 2A in the internal space 4, so The flow of oxygen is blocked and the fireproof performance as the window frame 2 is improved.

  As shown in FIGS. 1 and 3, a metallic glass detachment stopper 24 is partially installed in the inner peripheral groove portion 10 of the window frame 2 so as to face the metallic angle member 17 in the indoor / outdoor direction. In addition, by positioning the outer peripheral edge of the multilayer glass 9 between the metal angle member 17 and the metal glass stopper 24, the multilayer glass 9 can be held directly or indirectly and held. ing.

  FIG. 4 is an enlarged vertical cross-sectional view of a main part showing a state in which the multi-layer glass is held by the metallic glass stopper, and FIG. 5 is an exploded perspective view of the metallic glass stopper.

As shown in FIGS. 4 and 5, the metallic glass stopper 24 is fixed to the bottom surface 10 a of the inner circumferential groove 10 in the window frame 2 by being mutually connected to the metallic angle member 17 with screws or the like. A glass receiving portion 25 and a glass mounting portion 26 that is detachably attached to the glass receiving portion 25.
Each of the glass receiving portion 25 and the glass mounting portion 26 is formed by cutting a single metal plate such as a stainless steel plate having a thickness of about 1 mm into a predetermined shape by laser processing, pressing, or the like, and then bending it. ing.

The glass receiving portion 25 includes a mounting piece portion 27 fixed to the bottom surface 10a of the inner peripheral groove portion 10 in the window frame 2 by screws and the like, and a retaining piece portion 28 raised up at a right angle from the indoor side end of the mounting piece portion 27. It has a substantially L shape in side view.
The attachment piece portion 27 includes a pair of holding piece portions 30 and 30 having an engagement hole 29 opened, and an engagement groove portion 31 formed by cutting and raising at a central portion between the holding piece portions 30. Have.

The glass attachment portion 26 is erected at a right angle from the insertion piece portion 32 inserted from the outdoor side B toward each holding piece portion 30 of the attachment piece portion 27, and from the outdoor side end of the insertion piece portion 32. It consists of the non-removal piece 33 and has a substantially L shape in side view.
The insertion piece 32 includes a pair of engagement pieces 34, 34 that are engaged with the engagement hole 29 and formed in a notch shape, and a center between the engagement pieces 34. And a locking piece 35 that is engaged with the engaging groove 31 of the glass mounting portion 26.
Further, the edge portions on both sides of the insertion piece portion 32 are formed by extending extending pieces 36 at right angles toward the indoor side A, and these extending pieces 36 are provided with the anti-detachment piece portions 33 at the outdoor side. When it is going to be bent to B, it engages with the outer peripheral end surface 3c of the multilayer glass 3 and acts to prevent the bending.

  On the metallic glass stopper 24, there is provided a foamable flameproof material 37 mainly composed of foamable graphite. The foamable flameproof material 37 is foamed by high-temperature heating in the event of a fire. By closing the gap between the metallic glass stopper 24 and the outer peripheral end face 3c of the multilayer glass 3, the flow of oxygen between the inside and outside of the room is blocked, and the fire-proof function as the window frame 2 is improved.

Next, a procedure for mounting the multilayer glass 3 in the inner peripheral groove 10 of the window frame 2 will be described.
First, the metal angle member 17 is assembled to the inner peripheral surface of the frame main body 2A in a state where the pressing edge 2B is not yet attached, and the glass receiving portion 25 of the metal glass stopper 24 is mounted on the metal angle member 17. , And partially disposed along the longitudinal direction of the members constituting the window frame 2.

  Next, the heat-resistant tape 18 extends over the inner surface (see FIG. 2) of the extending piece 17b of the metallic angle member 17 and the inner surface (see FIG. 3) of the glass receiving portion 25 on which the metallic glass stopper 24 is disposed. Are continuously disposed along the longitudinal direction of the frame main body 2 </ b> A, and then the outer peripheral end of the multilayer glass 3 is assembled to the inner peripheral surface of the frame main body 2.

A frame-shaped glass cradle (not shown) that supports the multi-layer glass 3 in contact with the outer peripheral end surface 3c and supports the multi-layer glass 3 is partially installed in the longitudinal direction in the frame body 2A.
Further, when the glass cradle is damaged due to high-temperature heating during a fire, the surrounding foamed caulking material 19 can be embedded and closed.

Next, the glass attachment portion 26 of the metallic glass stopper 24 is inserted into the gap between the outer peripheral end surface 3c of the multilayer glass 3 and the inner peripheral surface of the frame main body 2A from the outdoor side B of the frame main body 2A. Then, the insertion piece portion 32 of the glass attachment portion 26 is inserted into the holding piece portion 30 in the glass receiving portion 25, and the insertion piece portion is inserted into the engagement hole 29 opened in the holding piece portion 30. By inserting and locking the 32 locking pieces 34, the outdoor stoppers A and B in the multi-layer glass 3 are formed by the locking pieces 28 of the glass receiving portion 25 and the locking pieces 33 of the glass mounting portion 26. The outer peripheral ends 3 a and 3 b are held in a clamped state via the heat-resistant tape 18.
At this time, the outer peripheral edge 3a on the indoor side A in the multilayer glass 3 is water-tightly covered via the packing 15 provided at the tip of the support piece 8A in the frame body 2A.

Next, the pressing edge 2B is fitted into the fitting groove 9 formed in the inner periphery of the outdoor side B of the frame body 2A, and the outer peripheral end 3b of the outdoor side B of the multilayer glass 3 is attached with the packing 16 provided at the tip. Cover watertight.
Thereby, the multilayer glass 3 is mounted in the inner peripheral groove portion 10 of the window frame 2 formed by the frame main body 2A and the pressing edge 2B.
Thereby, in this embodiment, the packing 15. , 16, it can be constructed more easily than the fireproof structure described in Patent Document 2 in which the opening is sealed using a sealant that requires time for curing.
Further, since the double-glazed glass 3 is pressed and fixed by an appropriate force from the pressing edge 2B, the sealing performance of the double-glazed glass itself does not deteriorate and the glass does not rattle, and the long-term It can be used stably.

  According to the above-described configuration, when the multi-layer glass window is heated from the outdoor side B during a fire, even if the heat-resistant glass 12 collapses in about 3 to 4 minutes, the foamable caulking material 19 foams. By curing, the foamed caulking material 19 and the metal angle material 17 hold the glass A 11 on the indoor side A, and prevent the netted glass from collapsing for at least 20 minutes. Can do.

  In the case where flame escape is to occur toward the indoor side A through the gap between the bottom surface 10a of the inner peripheral groove 10 in the window frame 2 and the outer peripheral end surface 3c of the multilayer glass 3, the heat resistant tape 18 and the metal angle It can be shielded by the material 17.

  On the other hand, when the multi-layer glass window is heated from the indoor side, the foamable caulking material 19 is foamed and cured, so that the multi-layer glass window is supported by the cured body and the heat-resistant tape 18 supported by the metal angle member 17. Holding the glass 3 and preventing the collapsing of the glass 11 on the indoor side A for at least 20 minutes or more, and the heat-resistant glass 12 on the outdoor side B is heated by the netted glass 11 blocking heat. It is possible to suppress the breakage of the heat-resistant glass 12, and further, the flame on the indoor side A can be shielded by the metal angle member 17 and the heat-resistant tape 18.

  In the above embodiment, the metal angle member 17 is provided continuously along the longitudinal direction of the frame main body 2A constituting the window frame 2, but the metal angle member 17 and the metal glass stopper 24 are provided. May be alternately arranged in the longitudinal direction of the frame main body 2A.

DESCRIPTION OF SYMBOLS 1 Building frame 2 Window frame 2A Frame main body 2B Press edge 3 Multi-layer glass 3a Indoor side outer peripheral edge 3b Outdoor side outer peripheral end 3c Outer peripheral end surface 4 Internal space 5 Metal reinforcement 6 Screw 7 Attachment piece 8 Support piece 9 Fitting Groove 10 Inner circumferential groove 10a Bottom surface 11 Glass with glass 12 Heat resistant glass 13 Spacer 14 Sealed space 15, 16 Packing 17 Metal angle member 17a Horizontal piece 17b Extend piece 18 Heat resistant tape 19 Foaming caulking material 20 Backup materials 21, 22 , 23 Foaming flame shield 24 Metal glass stopper 25 Glass receiving portion 26 Glass mounting portion 27 Mounting piece portion 28 Stopping piece portion 29 Engaging hole 30 Holding piece portion 31 Engaging groove portion 32 Inserting piece portion 33 Stop piece 34 Lock piece 35 Lock piece 36 Extension piece 37 Foamable flameproof material A Indoor side B Outdoor side

Claims (7)

In the fire prevention structure of a double-glazed glass window that is made by attaching a double-glazed glass to a synthetic resin window frame or window fence
A metal angle member and a metal glass stopper are provided facing the interior and exterior of the window frame or the inner peripheral groove of the window glazing to which the multi-layer glass is mounted, and the metal angle member and the metal glass stopper are provided. An outer peripheral edge of the multilayer glass is positioned therebetween, and a foamable caulking material is interposed between the bottom surface in the inner peripheral groove portion and the outer peripheral edge surface of the multilayer glass, and further, the metal angle member and A fireproof structure for a multi-layer glass window, characterized in that a heat-resistant tape is interposed between the layer glasses.   The fireproofing of the multi-layer glass window according to claim 1, wherein a foaming flame shielding material mainly composed of foaming graphite is interposed between the foaming caulking material and the bottom surface of the inner peripheral groove portion of the window frame or window fence. Construction.   The fireproof structure for a multi-layer glass window according to claim 1 or 2, wherein a backup material is interposed between the foamable caulking material and the heat-resistant tape.   A metal reinforcement is provided in the internal space of the window frame and the window frame in the window frame of the fitted window or the window frame of the opening and closing window, and the metal reinforcement material and the window frame in the internal space. Or the double-glazed glass window in any one of Claims 1-3 which interposed the foaming flame-shielding material which has a foaming graphite as a main component in the gap | interval of the vertical direction or a horizontal direction between window ridges. Fireproof structure.   The fireproof structure for a multi-layer glass window according to any one of claims 1 to 4, wherein the foamable caulking material is a foamable silicone sealant.   The fireproof structure for a multi-layer glass window according to any one of claims 1 to 5, wherein the metal angle member and the metal glass stopper are connected to each other.   The fire prevention structure of a multi-layer glass window according to any one of claims 1 to 6, wherein the metal angle member and the metal glass stopper are alternately arranged in a longitudinal direction of a member constituting the window frame or the window frame. .

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