EP0654578B1 - Building element for fire protection with a glass pane - Google Patents

Description

The invention relates to a fire protection component a glass sheet with a circumferential lip, the Inset edge on both surfaces a heat conductive Has support, and wherein the support for derivation high heat flows in the event of fire Entry margin is formed.

In the known fire protection component of the above described construction (DE 30 44 718 A1) has the Fitting edge of the glass pane on both surfaces one Coating as a thermally conductive pad. The heat conductive Coating is interposed by a thermal barrier acting insulating material, for example from a fibrous filling material, inserted into the receiving groove. The has proven itself as long as the thermal stress in the event of a fire is not too high and the fire resistance duration too high demands are not made. A Improvement in fire resistance is at the known embodiment can be achieved by the Coating over the free edge of the receiving groove and so that the insulating filler can survive. In Connection with the insulation between the inset and Is the heat conduction in the inset edge through the frame low thickness of the coating with high thermal Inadequate stress.

The invention is based on the technical problem a fire protection component of the above Structure to significantly increase the fire resistance duration, even if the thermal stresses are extremely high.

The invention teaches to solve this technical problem in a generic fire protection component that the with the edition inset margin with a Recording groove for the inset edge Glass holding strips is connected to a holding frame, as well as a metallic on both sides of the inset Thermal bridge profile strip is provided, which, in Considered cross-section, an inlet flange, one Cover section and a radiation flange, in the event of fire, the thermal bridge profile strip on the Fire side absorbs heat energy and on the opposite side over the cost margin of the Glass transferred heat energy to the environment delivers.

With such a fire protection component Retaining frame and the glass retaining strips regularly from one suitable steel alloy or a suitable metal alloy. Basically, there is also Possibility to manufacture the holding frame from wood. The Glass holding strips can be molded onto the holding frame or be set up as independent components.

According to a further preferred embodiment, the stand-in edge flange between the coating of the inset edge and the associated glass holding strip and on the The cover section covers the cover edge the assigned glass retaining strip on the glass pane side and the radiation flange is on the outside in front of it Glass retaining strip.

The glass pane is preferably prestressed. The biased For example, glass pane consists of thermal or chemically toughened float glass, made of toughened or non-toughened glass of low thermal expansion, for example Borosilicate glass, or other suitable glasses.

According to the invention is due to the heat flow over the cost margin the glass pane is guided, achieved for a predeterminable period of time or a predeterminable temperature range a fire, it is ensured that the Temperature gradient between the middle area of the glass pane and initially kept the disc edge as low is that the critical, initiated by the fire Heating phase of the glass pane is safely survived. in the The further course of the fire remains as described Temperature gradient so large that the edge of the glass pane over remains below the softening temperature for long periods. This is due to the fact that according to the invention a thermally conductive Material, namely a metal, used as a thermal bridge and is arranged so that the thermal bridge is conductive Connection both with the edge of the glass pane as well is also with the environment. The thermal bridge profile strip is on the fire side considerable heat radiation and convection exposed. It says on the opposite side the thermal bridge profile strip with the essential there regularly colder environment. In both cases heat transfer by radiation and convection, however, the heat flow must be the edge of the glass sheet happen because of the resulting cooling remains stable for a long time.

There are several options within the scope of the invention further training and design. Although preferably the edge of the glass pane only on has a heat-conducting coating on both surfaces, there is also the possibility to make the arrangement that the coating encompasses the fillet edge in a U-shape. The Coating can be made from sheet metal strips, for example Sheet metal profile, made of galvanic or by vapor deposition Metal strips or a good heat-conductive enamel consist. Through the adjacent single edge flange can be a high one despite the comparatively thin coating Heat flow can be introduced into the cost margin. Will with Sheet metal strip or worked with a sheet profile, so owns this sheet is less than a millimeter thick, for example in the range of 0.2 to 0.6 mm. As part of the Invention lies through the edge of the glass sheet to provide an etching with a connection surface. The Etching removes microcracks that are exposed to fire could lead to premature breaks. As part of the invention further lies between the thermal bridge profile strips and the glass retaining strips a thermal insulation material to arrange.

According to the invention, with a metal holding frame by designing the thermal bridge profile strip and the Coating of the inset edge achieve that the fire protection components a fire resistance duration at one Fire test according to DIN 4102 of over 60 minutes, preferably of over 90 minutes.

In terms of optimization, the invention teaches in this context that the thermal bridge profile strips from a well heat-conductive metal alloy exist, their melting point is below the melting point of the glass sheet. So far for example with aluminum alloys, a tin alloy or can also be worked with copper alloys. One can in this way through a phase transformation of the metal alloy achieve an additional cooling effect. A comparable one Result can also be achieved if the thermal bridge profile strips at least on the cover sections and Radiation flanges paint a coat of high IR absorption and have IR emissivity. In any case, the one mentioned above additional cooling effect can be achieved in that the thermal bridge profile strips and the coating designed in this way are that the thermal bridge profile strips on the fire side at least in certain areas during the specified fire life melt, so that a phase change cooling takes place.

The advantages achieved are summarized in that initially with the fire protection component according to the invention Thermal energy from the source of the fire in a relatively short time Time is directed to the edges of the glass, that in the further course of the fire if the temperature the circumferential cost margin and the connected to it Areas of the glass pane are already at the softening temperature approaching, a cooling effect through radiation and convection via the thermal bridge profile strip on the opposite side of the glass sheet is reached, and in such a way that a sufficient fire resistance period sets in. This can be optimized in that the phase conversion cooling already described realized becomes. As a result, fire tests according to DIN can be achieved 4102 without further fire resistance periods of 60 minutes and more and even over 90 minutes.

The embodiments of the invention described above are detailed below with reference to FIGS. 1 and 2 explained.

A second embodiment, starting from claim 8 the invention provides that the edition by a thermally conductive Component is formed with a receiving groove, which receiving channel receives the edge of the glass pane, the side legs of the receiving channel with the both main sides of the glass panes in thermal contact stand. The heat-conducting component conducts in the event of a fire over the contact area between the side legs of the Receiving channel and the main sides of the glass pane heat in the edge of the glass pane. By using it of the heat-conducting component is the thickness of the support compared to a coating so that the heat conduction in the debit margin is improved and even at high thermal stress no failure of the glass pane occurs due to thermal stresses.

At least one side leg preferably has a length which corresponds to the amount of the glass pane or exceeds the glass pane thickness. It is understood that both side legs can be of the same length. The heat-conducting component is preferably made of metal. For example, the metal thickness should be> 0.5 mm, preferably> 1 mm and particularly preferably about 2 mm be. The heat-conducting component does not have to be on the whole The circumference of the glass pane can be arranged. There is a crack in the event of fire, regularly in the center of the longer side of the Glass pane occurs, it is possible for reasons of saving the corners of the glass pane not with the heat-conducting component to provide. With a disc with a sufficient large ratio of the side lengths, for example 2: 1, there is the possibility of only the heat-conducting component the longer sides. It is preferably the thermally conductive one Component on at least two thirds of the scope of the Glass pane arranged. It is advantageous, at least 80%, preferably at least 90% of the circumference of the glass sheet to be provided with the heat-conducting component. It it is understood that with a complete wrapping the Glass pane through the thermally conductive component is a faulty Distribution of the heat-conducting component on the circumference is safely avoided. It is further understood that the thermally conductive component not coherent, but also be arranged in sections on the circumference of the glass pane can. The heat-conducting component preferably consists of extruded metal. In terms of assembly, it is from Advantage if the heat-conducting component is preformed. The Receiving groove of the heat-conducting component can besides the Side legs also have a base that in there is thermal contact with the glass pane. The receiving channel can have a U-shaped cross section. The Fire resistance of glass regularly increases with thickness of the glass too. According to the invention, hardened material is preferably used Glass with a thickness of at least 10 mm is used. Here there is the possibility of using a heat-conducting component To provide web and this web in the receiving groove insert, with the glass pane outside the receiving groove through the side legs of the receiving channel of the heat-conducting Component is held.

The glass pane preferably consists of prestressed, especially toughened glass. According to the invention the glass pane also as a multi-glazed glass pane unit, preferably as a double-glazed glass pane unit, be trained. It is understood that also reinforced Glasses and laminated glass can be used.

In this way, the heat-conducting component is preferably inserted into the receiving groove used that the side legs of the receiving channel finish flush with the glass retaining strips. However, since the heat absorption of the thermally conductive component by a The side legs protrude above the glass retaining strips a preferred embodiment the invention that at least one side leg of the Receiving channel protrudes over the glass retaining strip. Preferably this side leg protrudes at least 10 mm. Another preferred embodiment provides this Cover the side legs with a decorative cover. Preferably is this cover made of plastic, which in In the event of a fire, the thermally conductive component melts Makes heat radiation of the fire accessible. It exists however, also the possibility of the decorative cover made of heat-conducting To produce material, for example from metal. It is understood that the decorative cover can be colored.

Preferably, the thermally conductive component before Transport fixed on the circumference of the glass pane. This has the advantage that the thermally conductive component covers the Area of the glass pane during handling, of transport and glazing protects. Hereby mechanical damage is avoided, in particular would reduce the fire resistance of the glass pane. This applies in particular if prestressed or hardened Glass is used where a jump is immediate or too later without warning to shatter the Disc can lead. In this context, it is advantageous if the lip of the glass sheet from micro cracks and cracking points are released. It is an advantage toughen the glass pane after being broken by micro cracks and cracking points are exempted, and then the edge in the heat-conducting component to use.

Fig. 1 und 2

einen Vertikalschnitt durch ein erfindungsgemäßes Brandschutz-Bauelement in der in Abschnitt I erläuterten Ausführungsform mit Wärmebrückenprofilleiste und

Fig. 3 bis 8

Vertikalschnitte durch Brandschutz-Bauelemente in der in Abschnitt II erläuterten Ausführungsform mit wärmeleitendem Bauteil.

In the following, the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. They show a schematic representation

1 and 2

a vertical section through a fire protection component according to the invention in the embodiment explained in section I with thermal bridge profile strip and

3 to 8

Vertical sections through fire protection components in the embodiment explained in section II with a heat-conducting component.

The fire protection component shown in the figures is equipped with a toughened glass pane 1, the one has circumferential filler edge 2. The cost margin 2 the glass pane 1 has a heat-conducting on both surfaces Edition 5. In Figs. 1 and 2 is the cost margin 2 in a metallic holding frame 3 with a receiving groove for the insert edge 2 glass retaining strips 4 used. In the exemplary embodiment, these are glass holding strips 4 independent components that are attached to the holding frame 3 are connected. On both sides of the margin 2 is furthermore a metallic thermal bridge profile strip 6 is provided, which, viewed in cross-section, an entry flange 7, a cover section 8 and a radiation flange 9 having. The Einstandsrandflansch 7 is between the edition 5 of the initial edge 2 and the associated glass holding strip 4, adjacent to the edge 2, arranged. The cover section 8 covers the associated glass holding strip 4 and the radiation flange 9 is on the outside this glass holding strip 4. In this way it is achieved that the thermal bridge profile bar 6 in the event of a fire on the fire side Absorbs heat energy and at the opposite Page transferred over the fillet edge 2 of the glass pane 1 Releases heat energy to the environment.

In the embodiment according to FIGS. 1 and 2, the Edition 5, the edge 2 of the glass sheet 1 U-shaped. The edition 5 consists of a sheet metal profile, but it could also be applied galvanically or by vapor deposition. The Edition 5 can also be made of a good heat conductor Enamelling exist. It was not drawn that the cost margin 2 of the glass sheet 1 pretreated by etching can be so that micro cracks are removed and the Connection surface with the pad 5 without risk of cracking works in the manner described. Between Thermal bridge profile strips 6 and the glass retaining strips 4 is a thermal insulation material 10 is arranged.

In the exemplary embodiment and according to a preferred embodiment The invention consists of the thermal bridge profile strips 6 a good heat conductive metal alloy, its melting point is below the melting point of the glass sheet 1. It can, for example, be a suitable aluminum alloy act. In this way, additional phase change cooling can be achieved by the fact that the Thermal bridge profile strips 6 and the support 5 of the cost margin 2 are designed so that the thermal bridge profile strip 6 fire side during the specified fire resistance period is melting at least in certain areas. Such a meltdown was indicated by dash-dotted lines in FIG. 1. As a result one achieves that the fire protection component has a fire resistance duration in fire tests according to DIN 4102 of over 60 minutes, preferably over 90 minutes.

3 to 8, the pad 5 by a thermally conductive Component 5 formed. The heat-conducting component 5 has a receiving channel 11, which the entry edge 2nd the glass pane 1 picks up. The two main sides of the glass sheet are with the side legs of the receiving channel 11 in thermal contact. For the glass pane 1 is preferred tempered soda lime glass used, preferably with a thickness of 10 mm, but glass panes can also be thick in the range from 6 mm to 15 mm. A the particularly preferred material is strongly prestressed Soda-lime glass. Conventional toughened soda-lime glass is prestressed in areas between 70 MPa and 85 MPa, while toughened glass in areas above 85 MPa is biased, with the upper limit by the for the Bias used equipment is limited. Fig. 3 shows one of the other components of the glass pane structure Holding frame 3 with setting blocks 12 and glass holding strips 4. In 3 to 8 is the holding frame 3 made of wood, and the Glass holding strips 4 are made using retractable steel screws 13 fixed on the holding frame. It understands yourself that the glass retaining strips 4 but also from the holding frame 3 can be formed. It goes without saying that the holding frame 3 can also be made of metal. 3 to 8, the heat-conducting component 5 is through Thermal insulation 10 separated from the glass retaining strips. Man recognizes that the side legs of the receiving channel 11 a Have length that corresponds to the thickness of the glass sheet 1. The heat-conducting component 5 is made of metal in FIG. 3 manufactured and has a sufficient for heat conduction Thickness, preferably 2 mm. Justified for larger metal thicknesses the improved thermal conductivity in general no longer the increased material costs. The thermally conductive Component 5 is made of aluminum or aluminum alloys, for example or made of stainless steel. It is preferably preformed. This preforming can be done on any Way, for example, generated by cutting and bending will. The heat-conducting component 5 can also by Extrusion can be generated. For a good thermal Contact is an exact adaptation of the thermally conductive component 5 to the edge 2 of the glass sheet 1 required. At least the side legs of the receiving channel 11 should be in direct contact with the main sides of the glass sheet 1 stand. Basically there is also the possibility this contact through a highly heat-conductive, pasty or adhesive substance between the receiving channel 11 and to improve the glass pane 1. Preferably, the Side legs of the receiving channel 11 pre-bent inwards, so that the heat-conducting component 5 through the fillet edge 2 the glass sheet 1 expanded and in so far an intimate and firm contact is achieved. The heat-conducting component 5 can in sections on the circumference of the glass pane 1 be arranged. This will assemble the thermally conductive Component 5 simplified. In Fig. 3 there is also Base of the receiving groove 11 in thermal contact with the Glass pane 1. This will usually be the case if the heat-conducting component 5 as described above without Adhesive placed on the edge 2 of the glass pane 1 becomes. It is important that the thermally conductive Component 5 the thermal radiation of the Can absorb fire. Figures 4 to 8 show this advantageous embodiments. In Fig. 4 the side legs protrude the receiving channel 11 via the glass holding strips 4 emerge and take off particularly quickly in the event of a fire Radiant heat of the fire. Preferably the collar Side legs protrude at least 10 mm. 4 are the protruding side legs visible. You can have a decorative coating. 5 become the protruding side legs of the receiving channel 11 of the heat-conducting component 5 from a decorative cover 14 covered. The decorative cover 14 can be made of extruded Metal or plastic exist and is designed so that they do not absorb the heat of the heat-conducting component 5 significantly reduced. For this reason, metallic Decorative covers 14 directly in contact with the heat-conducting Component 5 or the side legs stand. In the Use of plastic should be a non-combustible Plastic is used that melts in the event of a fire. In Fig. 6, the decorative strips 14 are shaped so that they Cover glass holding strips 4. Instead of the one in FIG. 3 to 6 shown simple glass sheet 1 can also composite glass panes, for example laminated glass panes or multi-glazed glass panes will. Fig. 7 shows a glass sheet 1, which is double glazed Glass pane unit is formed. The single disks 15 and 16 of the glass pane are replaced by a Spacer 17 separated from each other, this one resistant material, for example made of steel can be. The sealing material 18 has a high Temperature resistance and can, for example, from Silicone. In Fig. 7 at least the single disc 15 the required fire resistance and exists preferably made of toughened soda lime glass, whereby the edge 2 of micro cracks and crack formation points was liberated. The other single disc 16 can be of conventional Glass of reduced thickness can be made. It understands however, that both individual disks 15, 16 on the be fire-resistant manner described above can. In any case, the double-glazed glass panel unit as glass pane 1 in the extended receiving channel 11 of the heat-conducting component 5 used. Double glazed glass panel unit and thermally conductive Component 5 can as shown in FIGS. 3 to 6 in one Holding frame 3 can be connected. 8 shows an embodiment the fire protection component according to the invention, can be used through the glass panes 1, Thickness the width of the 4 formed by the glass retaining strips Recording groove surpasses. In this case it is thermally conductive Component 5 provided with a web 19 which is in the receiving groove is held while the glass sheet 1 between the side flanks the receiving groove 11 outside the receiving groove is fixed. The web width is preferably selected such that that it corresponds to the common glass pane thicknesses. It it is understood that also in the shown in Fig. 8 Embodiment decorative covers 14 are used can.

Claims (27)

1. A fire-protection module comprising a glass pane (1) and an all-round holding rim (2), in which the holding rim (2) contains a heat-conducting coating (5) on both surfaces and in which the coating is designed to conduct high heat flows absorbed in case of a fire into the holding rim, characterised in that the holding rim containing the coating (5) is connected to a support frame (3) by glass retaining strips (4), forming a receiving groove for the holding rim (2) as well as a sectional heat transfer strip (6) which, viewed in cross section, contains a holding rim flange (7), a covering section (8) and a radiation flange (9) and in which, in case of a fire, the sectional heat transfer strip (6) takes up thermal energy on the fire side and gives off the transferred thermal energy on the opposing side into the surroundings via the holding rim (2) of the glass pane (1).
2. A fire-protection module according to claim 1, in which the holding rim flange (7) is arranged between the coating (5) of the holding rim (2) and the associated glass retaining strip (4) and against the holding rim (2) and in which the covering section (8) covers the assigned glass retaining strip (4) and the radiation flange (9) is positioned on the outside and in front of this glass retaining strip (4).
3. A fire-protection module according to claim 1 or 2, in which a heat insulating material (10) is arranged between the sectional heat transfer strip (6) and the glass retaining strips (4).
4. A fire-protection module according to one of the claims 1 to 3, in which the retaining frame is made of metal and the sectional heat transfer strips (6) and the coating (5) of the holding rim (2) are designed in such a way, that the fire-protection module offers a fire resistance period in excess of 60 minutes during a fire test according to DIN 4102 and preferably in excess of 90 minutes.
5. A fire-protection module according to one of the claims 1 to 4, in which the sectional heat transfer strips (6) are made from a good heat-conducting metal alloy, whose melting point lies below that of the glass pane.
6. A fire-protection module according to one of the claims 1 to 5, in which at least the covering sections (8) and radiation flanges (9) of the sectional heat transfer strips (6) contain a coat of high IR-absorbing and IR-emitting paint.
7. A fire-protection module according to one of the claims 1 to 6, in which the sectional heat transfer strips (6) and the coating (5) of the holding rim (2) are designed in such a way that at least some areas of the sectional heat transfer strip (6) on the fire side melt during the specified fire protection period.
8. A fire-protection module comprising a glass pane (1) and a surrounding holding rim (2), in which the holding rim (2) contains a heat-conducting coating (5) on both surfaces and in which the coating is designed to conduct high heat flows absorbed in case of a fire into the holding rim, characterised in that the holding rim containing the coating (5) is connected to a support frame (3) via glass retaining strips (4) forming a receiving groove for the holding rim (2) and in which the coating (5) comprises a heat-conducting module (5) and a receiving groove (11), in which the said receiving groove (11) accepts the holding rim (2) and the glass pane (1) and in which the side legs of the receiving groove (11) are in thermal contact with both main sides of the glass pane (1).
9. A fire-protection module according to claim 8, in which the receiving groove (11) contains at least one side leg, whose length corresponds to the thickness of the glass pane or exceeds the thickness of the glass pane.
10. A fire-protection module according to claim 8 or 9, in which at least one side leg of the receiving groove (11) cantilevers over the glass support strips (4).
11. A fire-protection module according to claim 10, in which the side leg cantilevers by at least 10 mm.
12. A fire-protection module according to claim 10 or 11, in which the cantilevering side leg is covered by a decorative cover (14).
13. A fire-protection module according to one of the claims 8 to 12, in which the receiving groove (11) has a U-shaped cross section.
14. A fire-protection module according to one of the claims 8 to 13, in which the glass pane 1 is at least 10 mm thick and the heat-conducting module (5) contains a web (19) that can be inserted into the receiving channel for glazing, in which the pane (1) is retained outside of the receiving channel by the side legs of the receiving groove (11) of the heat-conducting module (5).
15. A fire-protection module according to one of the claims 8 to 14, in which the base of the receiving groove (11) is in thermal contact with the glass pane.
16. A fire-protection module according to one of the claims 1 to 15, in which the coating (5) surrounds the holding rim (2) in a U-shaped manner.
17. A fire-protection module according to one of the claims 1 to 16, in which the coating (5) consists of a sheet metal strip, a profiled sheet metal section, a metal strip applied by galvanisation or vaporisation or a good heat-conducting enamelling.
18. A fire-protection module according to one of the claims 1 to 17, in which the holding rim (2) of the glass pane (1) contains a connecting surface created by etching.
19. A fire-protection module according to one of the claims 8 to 9, in which the heat-conducting module (5) is produced from metal with a thickness of 0.5 mm or preferably 1 mm.
20. A fire-protection module according to claim 19, in which the metal is approx. 2 mm thick.
21. A fire-protection module according to one of the claims 8 to 20, in which the heat-conducting module (5) is arranged on at least two thirds of the perimeter of the glass pane (1).
22. A fire-protection module according to one of the claims 8 to 21, in which the heat-conducting module (5) is made from extruded metal.
23. A fire-protection module according to one of the claims 8 to 22, in which the heat-conducting module (5) is pre-formed.
24. A fire-protection module according to one of the claims 1 to 23, in which the glass pane (1) is made from pre-tensioned, preferably highly pre-tensioned glass.
25. A fire-protection module according to one of the claims 1 to 24, in which the glass pane (1) is a multiple glazed pane unit (1).
26. A fire-protection module according to one of the claims 8 to 25, in which the glass pane (1) is already inserted into the heat-conducting module (5) before transportation.
27. A fire-protection module according to one of the claims 26, in which the glass pane (1) contains a holding rim (2) free from microcracks and cracking points and is pre-tensioned and preferentially highly pre-tensioned.

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