EP2939713A2 - Fire-resistant curtain - Google Patents

Abstract

The application relates to a fire protection curtain comprising a fire protection element (12) comprising at least a first section (18) of fire protection textile and at least a second section (20) of fire protection textile, and a winding shaft (14) for winding and unwinding the fire protection element (12) in that the first section (18) and the second section (20) are arranged relative to one another such that a wicket door (28) is formed between the two. According to the invention, it is provided that the first section (18) and the second section (20) form an overlap (22) which tapers downwards, at least in sections.

Description

The invention relates to a fire protection curtain comprising (a) a fire protection element comprising at least a first section of fire protection textile and at least a second section of fire protection textile, and a winding shaft for winding and unwinding of the fire protection element, wherein the first portion and the second portion so relatively arranged to each other, that between both a wicket door is formed.

Such fire curtains are used to separate two fire sections of a building from each other and to prevent a fire can spread over at least for a predetermined time of one fire section on the other fire section. However, it is desirable that people who are in the burning part of the building, can escape through the fire curtain. For this purpose, so-called wicket doors are known.

From the US 6,070,640 is a generic fire curtain known, which is composed of several webs, which partially overlap with each other. This overlap can widen downwards. To ensure that the fire curtain closes on the one hand safely and on the other hand people as easily as possible to flee through the fire curtain, split baseboards are available. It is desirable to further facilitate the passage through such a fire screen.

From the DE 1 074 253 is known a folding shutter, in which the individual, concertina-shaped interconnected elements are penetrated by a rod that prevents unwanted vibrations of the slats.

Under a wicket door is understood a structure in the fire curtain, which allows a person to get from one side of the fire curtain to the other. These are not doors in the true sense, since the involved structures of the fire curtain can be moved relative to each other only to a limited extent.

A disadvantage of known fire curtains that the wicket doors can be operated either only with great effort, which reduces the escape in particular of physically disadvantaged people, or can be opened easily, but not a sufficient fire protection effect unfolds, especially if between the two Sides of the fire curtain forms a pressure difference.

A disadvantage of known wicket doors is also that they can reduce the life of the fire curtain. A fire door usually means a material thickening compared to the areas of the fire curtain in which no wicket door is formed. When winding the fire curtain on the winding shaft therefore forms a larger winding diameter in the area of the wicket, which leads to tensions in the fire protection textile and promotes wear.

The invention has for its object to improve fire curtains with wicket doors.

The invention solves the problem by a generic fire protection curtain in which the first portion and the second portion form an overlap, which tapers at least partially down and forms the wicket door.

According to a second aspect, the invention solves the problem by a fire protection curtain according to claim 3.

Advantageous on a wicket door, which is characterized by a downwardly tapering overlap is formed, that this can accommodate at its upper end a relatively large pressure difference between the fire-facing side of the fire curtain and the brand-facing side. During a fire, hot combustion gases are generated, which collect on top, so that on the side facing the fire, the pressure at the top is greater than at the bottom. Since the overlap is made wider at the top, the fire protection element can bulge more without the overlap would create a gap. In the lower area, however, the pressure difference between the side facing the fire and the side of the fire protection curtain away from the fire is lower, so that the lower overlap is sufficient to withstand the pressure difference. However, because of the lower overlap, it is easier for a fleeing person to open the wicket door. The fire curtain therefore combines a high fire resistance with a facilitated escape.

The advantage of the fact that the joint line is such that the axial position of the joint line changes along a winding shaft with the longitudinal axis of the winding shaft during winding, is that the conditional by the joint thickening leads only to small diameter variations in the winding when the fire protection element on the winding shaft is wound up. This protects the fire protection element and extends its service life.

In the context of the present description, a fire protection curtain is understood in particular to mean any device which is designed to prevent or sustainably inhibit the spread of fires and / or smoke, or to prevent the smoke produced by a fire from spreading. In particular, the fire or smoke protection device is designed to withstand a fire for at least 30 minutes, in particular at least 60 minutes, preferably for at least 90 minutes. This test is carried out in particular according to DIN EN 13501-2 and 3. A fire curtain therefore differs fundamentally from devices that are only suitable for closing openings.

Under the fire protection element is understood in particular a sheet-like element, which is fire retardant. The fire protection textile may comprise, for example, a knitted fabric, a woven fabric and / or a scrim. It is also possible that the fire protection element next to the fire protection textile has other components, such as endothermic active material that reacts physically or chemically when exposed to heat while absorbing heat. The fire protection element may also contain stiffening elements, such as stiffening slats.

The feature that the fire protection curtain comprises a winding shaft, is understood in particular that the fire curtain has exactly one winding shaft. Such a smoke curtain requires little space and is easy to drive.

Under the feature that the overlap tapers at least in sections downwards, is understood in particular that the overlap in its upper quarter is at least 1.5 times as wide as in its lower quarter, the width of the overlap in the upper quarter and in lowest quarter is to be understood as an average of the width. In particular, the overlap in the top quarter is at least 20 cm wider than in the bottom quarter.

It is possible, but not necessary, for the width of the overlap to decrease monotonically from top to bottom in the mathematical sense. It is also possible and encompassed by the invention, although generally not advantageous if the overlap increases in sections downwards. It is particularly favorable if the overlap tapers monotonically or strictly monotonically from top to bottom, that is to say that the overlap constantly decreases in width from top to bottom.

Preferably, the overlap at least over four-fifths of its height has a width of at least 20 cm. This ensures a sufficient fire protection effect.

Under the feature that the first portion and the second portion are connected to each other in a joint that extends along a joint line, is in particular understood that it is possible and preferable that the joint, for example a seam, runs straight. But it is also possible that the joint consists of several areas which are spaced from each other. For example, it is conceivable that the first portion and the second portion are connected to each other by means of point-shaped splices or by means of seams or rivets. The joint line in this case is the equalization line through the individual joints.

Joining is understood in particular as joining according to DIN 8593, in particular textile joining. For example, the joint is a seam or an adhesive bond.

According to a preferred embodiment, the joint line forms, at least in sections, an angle of inclination with the vertical of at least 3 °. Already such a small angle of inclination causes the diameter of the coil of fire protection element, when the fire protection element is wound onto the winding shaft, has a more uniform diameter than when the joint line always runs at the same axial height. Preferably, the inclination angle is at least 5 °.

If the joint has a joint width, the angle of inclination is at least over two-thirds of the height of the overlap greater than the Arctangent of the quotient of the joint width as a counter and a circumference of the winding shaft as denominator. The joint width refers to the width of that zone in which the fire protection element due to the joint has a thickness greater by at least 25% than in areas adjacent to the joint. Preferably, the angle of inclination is greater than the Arctangent of the quotient of the joint width as a counter and a circumference of the coil, which is formed from the wound on the winding shaft fire protection element. This results in a very uniformly thick winding.

According to a preferred embodiment, the fire protection curtain comprises a baseboard which secures a first baseboard section, to which the first section is attached, and at least one second baseboard section, to which the second section is attached is, wherein the first baseboard section and the at least second baseboard section are separable by bending in a horizontal plane. This allows a fleeing person to easily separate the baseboard between the two baseboard sections by kinking the baseboard. This can be done, for example, by exerting a force at the transition between the two baseboard sections.

According to a preferred embodiment, the baseboard has a connecting device for the reversible, in particular non-positive and / or latching connection of the first Fußleistenabschnitts with the second Fußleistenabschnitt.

An independent object of the invention is a fire and / or smoke curtain with a baseboard having a first Fußleistenabschnitt and at least a second Fußleistenabschnitt, wherein the baseboard has a connecting device for reversibly connecting the first Fußleistenabschnitts with the second Fußleistenabschnitt. The baseboard preferably has a connecting device for the reversible, in particular non-positive and / or latching connection of the first Fußleistenabschnitts with the second Fußleistenabschnitt. It is favorable if the fire protection curtain has a fire protection element which comprises at least a first section of fire protection textile and at least a second section made of fire protection textile, wherein the first section is attached to the first baseboard section and the second section is attached to the second baseboard section. The preferred embodiments described below relate to these and the inventions described above.

For example, the connecting device comprises a magnet, so that the two Fußleistenabschnitte are reversibly connected by magnetic force. According to the invention, a fire protection curtain with a fire protection element and a baseboard, which has a first Fußleistenabschnitt and a second Fußleistenabschnitt, wherein the baseboard a connecting device for reversible, in particular non-positive and / or non-locking, connecting the first Fußleistenabschnitts having the second Fußleistenabschnitt. Such a baseboard is particularly easy to transport. Fire curtains can have a considerable width, for example more than 30 m. While the fire protection element of fire protection textile can be easily transported rolled or folded, for example, the skirting usually has to be made in individual parts and assembled together on site. Although it is possible to connect the baseboard sections, for example, by screwing together, the said connection but has the advantage of being able to provide a wicket door in a simple manner. The statements mentioned in the present description relate to this invention.

According to a preferred embodiment, the connecting device has an actuating device, in particular for actuation with the foot, so that the first baseboard section can be detached from the second baseboard section by actuating the actuating device. Thus, the actuator may be constructed like a door lock that can be opened with the foot. Preferably, the actuating device has an actuating element which is designed for actuation with the foot. Then a fugitive person can step on or against the actuator with his foot and thus open the connection device. The baseboard sections are then unconnected and the wicket door can be opened.

According to a preferred embodiment, the baseboard has a third and a fourth Fußleistenabschnitt, wherein the Fußleistenabschnitte are numbered according to their order from one side of the fire curtain to the other. The second baseboard section is aufdrückbar. So it dissolves by pressure from the first and third Fußleistenabschnitt. The third Fußleistenabschnitt is also aufdrückbar and dissolves from the second and fourth Fußleistenabschnitt. This ensures that, for example, a wheelchair user can pass through the wicket door by driving against the section of the fire protection element which is connected to the baseboard section, which can be opened by pressure. A width of at least one baseboard section which can be pressed on is preferably at least 80 cm and preferably at most 150 cm. This is how a wheelchair can drive through the wicket door.

The first baseboard section and the second baseboard section, preferably also the second baseboard section and the third baseboard section and, if present, also the third baseboard section and the fourth baseboard section, are preferably positively connected to each other with respect to a bend in a vertical plane. As a result, the stresses that arise during winding in the fire protection fabric, which cause a bending of the skirting in the vertical plane, are taken up by the baseboard and introduced into other parts of the fire protection element. In other words, the baseboard sections always remain in the same position relative to each other during the winding and unwinding of the fire protection element and do not separate from each other, although the Fußleistenabschnitte can be separated by exerting a force in the horizontal plane.

Preferably, the baseboard has a thermally activated connection device which is formed so that it connects the first and second Fußleistenabschnitt firmly when a predetermined activation temperature is exceeded. Preferably also - if present - the second and the third Fußleistenabschnitt connected by the connecting device with each other and - if available - and the third and the fourth Fußleistenabschnitt.

Figur 1

einen Bandschutzvorhang gemäß eines Aspekts der Erfindung mit einer Schlupftür in einer perspektivischen Ansicht,

Figur 2

einen Brandschutzvorhang gemäß des ersten und eines zweiten Aspekts der Erfindung, der eine Schlupftür aufweist und bei dem die Abschnitte in einer Fügelinie miteinander verbunden sind, die einen Neigungswinkel zur Vertikalen aufweist,

Figur 3

eine alternativ Ausführungsform eines erfindungsgemäßen Brandschutzvorhangs, der zwei Schlupftüren aufweist,

Figur 4

eine weitere Ausführungsform eines erfindungsgemäßen Brandschutzvorhangs,

Figur 5a

einen weiteren erfindungsgemäßen Brandschutzvorhang in einer perspektivischen Ansicht, bei dem die Fußleistenabschnitte miteinander verbunden sind,

Figur 5b

den Brandschutzvorhang gemäße Figur 5a, bei dem zwei Fußleistenabschnitte voneinander getrennt sind und

Figur 6

eine Detailansicht einer Verbindungsvorrichtung zwischen zwei Fußleistenabschnitten.

Figur 7

zeigt eine Ausführung eines erfindungsgemäßen Brandschutzvorhangs gemäß der ersten beiden und einen weiteren Aspekt der Erfindung auch mit vier Fußleistenabschnitten.

In the following the invention will be explained in more detail with reference to the accompanying drawings. It shows

FIG. 1

a band protection curtain according to one aspect of the invention with a wicket door in a perspective view,

FIG. 2

a fire protection curtain according to the first and a second aspects of the invention, which has a wicket door and in which the sections are joined together in a joint line having an angle of inclination to the vertical,

FIG. 3

an alternative embodiment of a fire protection curtain according to the invention, which has two wicket doors,

FIG. 4

a further embodiment of a fire protection curtain according to the invention,

FIG. 5a

a further inventive fire protection curtain in a perspective view, in which the Fußleistenabschnitte are interconnected,

FIG. 5b

the fire curtain according to FIG. 5a in which two baseboard sections are separated from each other and

FIG. 6

a detailed view of a connecting device between two Fußleistenabschnitten.

FIG. 7

shows an embodiment of a fire protection curtain according to the invention according to the first two and another aspect of the invention with four Fußleistenabschnitten.

FIG. 1 shows a fire protection curtain 10, which has a fire protection element 12 and a winding shaft 14, on which the fire protection element 12 can be wound up. The winding shaft 14 comprises an in FIG. 1 schematically drawn winding shaft motor 15 for motorized driving of the winding shaft. The fire protection curtain 10 comprises lateral guides 16.1, 16.2, by means of which is attached to the soffits of a building opening 17 of a building 19. The building 19 with a fire protection curtain 10 according to the invention is an independent subject of the present application.

The fire protection element 12 comprises a first portion 18 and a second portion 20, which form an overlap 22. The overlap 22 is shown in dashed lines. It can be seen that the overlap 22 has a greater width b at the top than at the bottom. In the present case, the width b in an upper quarter V _{o of} the overlap 22 is at least 1.5 times greater than in a lower V _u .

The fire protection curtain 10 comprises a skirting board 24, which has a first baseboard section 26.1 and a second baseboard section 26.2. In the present case, the baseboard 14 is formed by the two Fußleistenabschnitte.

FIG. 1 shows that the first portion 18 and the second portion 20 are arranged relative to each other, that the overlap 22 between both forms a wicket 28, which can be seen in the open state. The width b of the overlap 22 is below, so adjacent to the skirting board 24, in the present case 20 cm and 50 cm at the top.

FIG. 1 shows that the first section 18 of three tracks 30.1, 30.2, 30.3 is constructed and the second section 20 of three tracks 30.4, 30.5 and 30.6. In each section 30 (reference numeral without Zählsuffix denote the object as such) adjacent tracks are connected by joints 32, ie in the present case, the joints 32.1, 32.2, 32.3 and 32.4. The joints 32 are in the present case seams, which are executed by means of a fire-resistant suture. For example, the suture includes wires or aramid threads.

FIG. 2 shows a fire protection curtain 10 according to the invention, in which the joint 32.1 extends along an imaginary joint line L1, which forms an inclination angle α1 with the vertical v. In the present case, the inclination angle α1 = 4 °. The joint 32.2 extends along an imaginary joint line L2, whose inclination angle in the present case corresponds to the first inclination angle α1. The joints 32.3. and 32.4 extend along respective joint lines that are inclined by a magnitude equal inclination angle opposite to the vertical.

so ist der Versatz entlang einer Längsachse A bei einer Umdrehung genau gleich der Fügestellenbreite d. Es gilt also $\mathrm{tan\alpha }=\frac{d}{\mathrm{\pi }D}\mathrm{.}$

In the lower part of the figure is shown schematically how the joints 32 extend along a helical path when the fire protection element 12 is wound on the winding shaft 14. If the inclination angle α1 is equal to the arctangent of the quotient $\frac{d}{\pi \cdot D}.$

so the offset along a longitudinal axis A in one revolution is exactly equal to the joint width d. So it applies $\mathrm{tan\alpha }=\frac{d}{\mathrm{\pi }D}\mathrm{,}$

FIG. 3 shows a further fire protection curtain 10 according to the invention, which has a third portion 34. This results in the first overlap 22, a second overlap 36. It can be seen that the first portion 18 has a first free edge 38 which extends at an edge angle β1 to the vertical v. The edge angle β1 in the present case is 5 °. It can also be seen that the second section 20 has a free edge 40 which extends at an edge angle β2 to the vertical v, wherein this edge angle β2 may correspond to the edge angle β1 of the first free edge 38, but need not.

FIG. 4 shows a further fire protection curtain 10 according to the invention, in which the second portion 20 has two edges with an edge angle of 0 °, whereas both the first portion 18 and the third portion 34 free edges with an edge angle β1 or β4 of non-0 °, im present case 5 °, possess. Of course, it is also possible in this case that the edge angles β1 and β4 differ from each other.

FIG. 5a shows a further inventive fire protection curtain 10, in which the winding shaft 14 is mounted on roller bearings 42.1, 42.2, 42.3 resting. The storage of the winding shaft 14 on at least one roller bearing is a preferred embodiment. FIG. 5a shows the baseboard 24, in which the Fußleistenabschnitte 26.1, 26.2,26.3 are interconnected.

FIG. 5b shows that the second baseboard section 26.2 from the first baseboard section 26.1 can be solved by applying a compressive force F.

FIG. 6 shows a baseboard 24, which includes a connecting device 44 having a magnet 46. If the first section 26.1 is sufficiently close to the second section 26.2 of the baseboard 24, then the magnet 46 attracts a ferromagnetic counterpart 48, so that the two baseboard sections 26.1, 26.2 are fixed relative to one another. The baseboard 24 may also be attached to a fire protection element which has no overlap or whose overlap does not taper or runs vertically at the joint line.

One of the two Fußleistenabschnitte, in the present case, the second Fußleistenabschnitt 26.2, has a coupling structure 50, which cooperates with the opposite end of the adjacent Fußleistenabschnitts, in the present case of Fußleistenabschnitts 26.1, that the two Fußleistenabschnitte 26.1, 26.2 with respect to a bend B in a vertical plane E are positively connected with each other. Bend B is the bend that occurs when one of the two sections pulls up more than the other. The vertical plane is the plane in which the sections to which the baseboard sections are attached extend, in the present case the x-y plane.

It can be seen that the baseboard 24 also includes a locking device 52, by means of which the two baseboard sections 26.1, 26.2 can be permanently connected to each other so that they can not be separated by applying the compressive force F.

In the present case, the locking device 52 comprises a driving element 54 of intumescent material which expands in case of fire. The drive element 54 then presses a latch 56 from the in FIG. 6 shown rest position so that it engages in a case 58 in the opposite foot section. By the locking device 52 ensures that in case of fire at the time when the fire heat has become so strong that no longer with the survival of people in the affected fire section can be expected, the skirting board has its maximum bending strength in all directions. The split skirting with the locking device therefore initially allows easy escape and later ensures high strength of the fire curtain and thus a high fire retardant effect.

FIG. 7 shows a fire protection curtain 10 according to the invention in a schematic sectional view with four Fußleistenabschnitten, wherein the first Fußleistenabschnitt 26.1 and the second Fußleistenabschnitt 26.2 by exerting a first compressive force F1 in the normal direction N on the fire protection element and adjacent to the first Fußleistenabschnitt 26.1 or a compressive force F2 adjacent to the third baseboard section 26.3 acts on the second baseboard section 26.2, in a horizontal plane H are separable. In the present case, the horizontal plane H corresponds to the paper plane. The third baseboard section 26.3 and the fourth baseboard section 26.4 are separable in the horizontal plane H by exerting a third compressive force F ₃ acting counter to the normal direction N and acting adjacent to the fourth baseboard section 26.4 on the third baseboard section 26.3. Dashed the second baseboard section 26.2 is inscribed after separation. It can be seen that results in a relatively wide wicket. The wicket width S is preferably between 70 cm and 140 cm, in particular 80 cm and 120 cm. This allows driving through a wheelchair. <B> LIST OF REFERENCES </ b> 10 Fire curtain 50 coupling structure 12 Fire protection element 52 locking device 14 winding shaft 54 driving element 15 winding motor 56 bars 16 guide 58 Cases 17 building opening 18 first section α tilt angle 19 building β edge angle 20 second part A longitudinal axis 22 overlap b width 24 baseboard B bend 26 first baseboard section d Joints width 27 separation point D diameter 28 wicket e level 30 train F thrust 32 joint L joint line 34 third section N normal 36 second overlap V ₀ , V ₁ quarter 38 first free edge v vertical 40 second free edge 42 roller bearing 44 connecting device 46 magnet 48 counterpart

Claims (11)

Fire protection curtain with (A) a fire protection element (12), the - At least a first section (18) made of fire protection textile and comprising at least a second section (20) of fire protection textile, and (b) a winding shaft (14) for winding and unwinding the fire protection element (12), (c) wherein the first section (18) and the second section (20) are arranged relative to one another such that a wicket door (28) is formed between the two,
characterized in that (D) the first portion (18) and the second portion (20) form an overlap (22), which tapers at least partially downwards. Fire protection curtain according to claim 1, characterized in that - The first portion (18) has a first free edge (38) which extends at an edge angle (β) of at least 3 ° to the vertical and / or - The second portion (20) has a second free edge (40) which extends at an edge angle (β) of at least 3 ° to the vertical (v). Fire protection curtain with (A) a fire protection element (12), the - At least a first web (30) made of fire protection textile and - At least a second web (30) made of fire protection textile comprises, and (B) a winding shaft (14) for winding and unwinding of the fire protection element (12) (c) wherein the first web (30.1) and the second web (30.2) are joined together in a joint (32) extending along a joint line (L),
characterized in that (D) the joint line (L) extends so that the axial position of the joint line (L) along a winding shaft longitudinal axis (A) of the winding shaft (14) changes during winding. Fire protection curtain according to claim 3, characterized in that the joint line (L) at least in sections forms an angle of inclination (α) with the vertical (v), which amounts to at least 3 °. Fire protection curtain according to claim 3 or 4, characterized in that - The joint (32) has a joint width (d) and - The inclination angle (α) in terms of magnitude is greater than the Arctangent of the quotient of the joint width as a counter and a circumference of the winding shaft (14) as a denominator. Fire protection curtain according to one of the preceding claims, characterized by (a) a baseboard (24), the a first baseboard section (26.1) to which the first section (18) is attached, and at least one second baseboard section (26.2) to which the second section (20) is attached,
having, (b) wherein the first footer portion (26.1) and the at least one second page footer portion (26.2) by bending in a horizontal plane (E) are separable. Fire protection curtain according to claim 6, characterized in that the baseboard (24) has a connecting device (44) for reversible, in particular non-positive and / or latching, connecting the first Fußleistenabschnitts (26.1) with the second Fußleistenabschnitt (26.2). Fire protection curtain according to claim 7, characterized in that the connecting device (44) has an actuating device, in particular for actuation with the foot, so that the first Fußleistenabschnitts (26.1) from the second Fußleistenabschnitt (26.2) by actuating the actuating device (44) is releasable. Fire protection curtain according to claim 6 or 7, characterized in that (a) the baseboard (24) has a third baseboard section (26.3), wherein the second baseboard section (26.2) is arranged between the first baseboard section (26.1) and the third baseboard section (26.3), (b) the baseboard (24) has a fourth baseboard section (26.4), the third baseboard section (26.3) being arranged between the second baseboard section (26.2) and the fourth baseboard section (26.4), (c) a first separation point (27.1) is formed between the first baseboard section (26.1) and the second baseboard section (26.2), (d) a second separating point (27.2) is formed between the second baseboard section (26.2) and the third baseboard section (26.3), (E) between the third Fußleistenabschnitt (26.3) and the fourth Fußleistenabschnitt (26.4), a third separation point (27.3) is formed, and (f) the first baseboard section (26.1) and the second baseboard section (26.2) by exerting a first compressive force (F1) acting in the normal direction on the fire protection element (12) and adjacent to the first baseboard section (26.1) on the second baseboard section (26.2) in which horizontal plane (E) is separable, (g) the second baseboard section (26.2) and the third baseboard section (26.3) act by exerting a second (F2) acting in the direction of the first compressive force (F1) and adjacent to the third baseboard section (26.3) on the second baseboard section (26.2) , in the horizontal plane (E) are separable and (h) the third baseboard section (26.3) and the fourth baseboard section (26.4) acting on the third baseboard section (26.3) adjacent to the fourth baseboard section (26.4) by applying a third compressive force (F3) against the direction of the first compressive force (F1) ), are separable in the horizontal plane (E). Fire protection curtain according to one of claims 6 to 9, characterized in that the first baseboard section (26.1) and the second baseboard section (26.2) with respect to a bend (B) in a vertical plane (E) are positively connected to each other. Fire protection curtain according to one of claims 6 to 10, characterized in that the baseboard (24) has a thermally activatable locking device (52) which is formed so that it exceeds the first Fußleistenabschnitt (26.1) and the second when exceeding a predetermined activation temperature Baseboard section (26.2) firmly together.

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