EP2224090A2 - Fire-resistant seal device - Google Patents

Abstract

The fire-resistant locking device (10) has a closing element (12) for closing an opening. The closing element has sections (14.1,14.2). An intumescent material is arranged between a front surface (18.1) and a rear surface (20.1). The front surface and the rear surface are connected such that a volume increase of the intumescent material is guided to a shift of the front surface relative to the rear.

Description

The invention relates to a fire-retardant closure device, in particular a fire-retardant gate, with at least one closing element for closing an opening in a closed position, wherein the closing element has at least one section having a rigid front surface and a rear surface facing away from the front surface, wherein between the front surface and the Rear surface intumescent material is arranged.

A fire-retardant door in the form of a plastic door, in which the closing element is formed by a roller-armor, is known. The Rollpanzer consists of a plurality of Torlamellen, which have a rigid front surface made of a plastic and a rigid rear surface also made of a plastic. Fireproof material is arranged between the front surface and the rear surface. In case of fire burns or charred the fire-facing side, so for example, the front surface or the rear surface of the closing element.

A disadvantage of such a fire-retardant closure device is that it represents a fire load itself. When burning or charring the plastic is namely free heat, which is undesirable. It can also lead to smoke, which is also undesirable.

Also known are roller doors with a mineral wool or water filling. The disadvantage of this is that such roller doors are quite thick, especially if they should have the classification "fire resistant" (T 90 or EI 90), and therefore poor or can not be wound because they require a considerable amount of space.

A generic closure device is from the DE 10 2005 023 426 B3 known. In the fire protection door leaf described therein, the front surface and the rear surface are formed by metal sheets, each having hook profiles which engage with each other. In case of fire, the sheet metal facing the fire warps. In case of fire, the two metal sheets therefore move against each other by sliding in the hook connection to each other. This ensures that the metal sheet facing away from the fire does not deform and closes securely with the frame. A disadvantage of this system is the complex production, which is the case in particular when the closing element has several sections. In this case, a separate hook connection must be made for each section. Another disadvantage is the low insulating effect.

From the EP 1 555 378 A2 a fire door is known in which laterally intumescent material is arranged to seal gaps to the door frame. Intumescent material is also used to seal other gaps, such as around the pusher. The fire resistance is ensured by calcium silicate material, which releases moisture in case of fire. A disadvantage of such a fire door is their high weight, which makes a transfer of technology to closing elements that have more than one section, unattractive appearance.

From the EP 1 707 714 A2 is an emergency lock for a fire door known in which under the influence of temperature expanding material presses a bolt in a prepared receptacle for locking and thus locks the fire door. Such technology is not applicable to the front surface and rear surface of the closure member.

From the EP 1 275 811 A1 a fire protection door is known, the door leaf has a thin layer of foamable material. The disadvantage of this is that such a layer can not be used for multi-sectional closing elements, since, for example, when the sections are rolled up, the layer is rubbed off.

From the WO 03/004394 A2 a hoistway door is known in which the front surface is releasably secured to the rear surface. In case of fire, the front surface facing the fire separates from the rear surface so that the front surface can curve. The back surface, however, remains unaffected.

From the AT 355 784 is known a roll-up door, in which between the individual sections insulation boards are present in order to avoid thermal bridges. The disadvantage of this is the high weight of the insulation boards and their potential wear during operation of the roller shutter.

From the EP 2 110 506 A1 is known a roller door, in which a plurality of pockets disposed under heat refrigerant dispensing substance. A disadvantage of this roller door is the lack of mechanical stability.

The invention has for its object to produce a fire-retardant closure device that is particularly easy to manufacture.

The invention solves the problem by a generic fire-retardant closure device in which the front surface and the back surface are interconnected so that an increase in volume of the intumescent material leads to a displacement of the front surface relative to the back surface.

An advantage of this closure device is that it winds thin. Normally, if there is no fire, the intumescent material has a small volume and the front surface thus a small distance from the rear surface. The closure device can be easily wound onto a shaft. The fact that the front surface and the back surface are connected together so that they can move against each other, the intumescent material can expand in case of fire. So a high fire retardant effect is achieved.

In contrast to known plastic doors, this is achieved without having to burn or burn neither the front surface nor the back surface in order to make room for to create the expansion because the front surface can move relative to the back surface. The displacement of the front surface relative to the back surface results in the desired increase in the volume between the front and back surfaces, which is filled up by the intumescent material, so that the closure device thickens and effectively inhibits the fire.

It is also advantageous that the rigid front surface and / or the rear surface can be made of metal, for example, so that it is particularly resistant to wear or are. It is also possible, unlike in the prior art, to use a material which retains its strength in the event of fire and does not burn or char. The use of metal also requires a high thermal conductivity, so that the intumescent material swells quickly and shields the fire heat.

But it is quite possible that the front surface and the rigid rear surface are made of combustible or other thermally unstable material. Also in this case, the fire load is reduced compared to existing closure devices, because the thermal instability of the front and rear surfaces unlike the prior art is not a constructive necessity. So it is possible to use fiber reinforced plastic for the front surface and / or the back surface.

In the context of the previous description, the fire-retardant closure device is understood in particular to mean a device for closing openings, for example in buildings. It may, for example, be a door, a gate, a roller shutter or a conveyer closure.

The closing element could also be referred to as a partitioning element, since it is preferably designed to seal off the opening and to form a fire resistance.

In particular, the feature that the closure device is fire-retardant becomes understood that she withstands a fire for at least 30 minutes. In principle, although each closure device has a certain fire-spreading inhibitory effect, this is not meant in the present case. Decisive is that the closure device is designed to inhibit the spread of fire and is designed to be particularly temperature resistant.

Under intumescent material is understood in particular any material that inflates when exposed to heat, without being flammable. In particular, the intumescent material is designed so that it inflates in case of fire to twice its volume or more.

Under the closing element is in particular that movable element of the closure device understood, which serves to close the opening. Thus, the closing element in the case of a door, a swinging gate, a tilting gate or a swing gate is the door leaf, in the case of a roll-up door of the rolling armor and in the case of a sectional door the entirety of all sections.

By the feature that the front surface is rigid, it is understood, in particular, that the front surface, which may for example be the front side of a door blade, does not substantially deform during operation. In particular, the front surface and the back surface are not flexible as in a fire screen.

The fact that the front surface or the rear surface is rigid also relates in particular to the fire, so that in this case the volume increase of the intumescent material is made possible mainly by the displacement of the front surface relative to the rear surface and not by a deformation of the front and / or rear surface.

In its preferred embodiment, the closing element has a first section and at least one second section, which can be brought into a closed position to form a closing surface and which can be brought into a storage position for rolling up. For this purpose, the first section and the second section are attached to each other, for example hinged together.

If the fire retardant closure device is a roller shutter, the sections are formed by the door fins. In a roller shutter, the sections corresponding to the profiles hinged together, which are also called rods. As a rule, there are more than two sections, in particular there are a plurality of sections mounted in pairs.

In a preferred embodiment, the front surface and the rear surface are connected by means of a fire protection textile. This fire-resistant textile is normally arranged, so if no fire, arranged in bows, placed meandering or folded. In case of fire, the intumescent material expands and pushes the front surface and the back surface apart. This smoothes the fire-resistant textile and allows so that the front surface shifts relative to the back surface by both move away from each other. It is possible, but not necessary, for the move to be a guided move. So it is indeed possible that the front surface and the back surface are led to each other, but dispensable.

In a preferred embodiment, the front surface and the rear surface are incombustible. For example, they are made of metal or include metal and other non-combustible materials. Metal has the advantage of being particularly wear-resistant. Another advantage of using metal, such as a metal sheet, for the front surface and the back surface is that it is particularly easy to work on and finish, for example, to be painted. The use of metal for the front surface and the back surface therefore leads to a particularly robust and low-wear closure device. This is particularly advantageous when it comes to the closure device is a gate, as this is often closed and opened in daily operation.

There are arranged between the front surface and the rear surface expansion joints, which are formed so that they increase the volume of the intumescent Material allow the displacement of the front surface relative to the back surface. In case of fire, as the intumescent material expands, the intumescent material exerts a force on the front surface and the back surface. This force also acts on the expansion joints. The expansion joints are designed to yield to the force so that the front surface can move relative to the back surface. This opens the expansion joints. The expansion joints may be present in the front surface, the rear surface or in a separate component connecting the front surface and the rear surface.

The expansion joints have the advantage that the closing element is particularly easy to manufacture so that an increase in thickness is possible. Another advantage is that the expansion joints can be designed so that the closure device is sufficiently rigid and does not warp in normal operation. There is therefore no additional stiffening necessary.

It is advantageous if the expansion joints are formed so that when moving the front surface relative to the rear surface, a heat transfer coefficient for a heat transfer from the front surface to the back surface decreases. It is assumed that the front surface facing the fire in case of fire, whereas the rear surface is facing away from the fire. The heat transfer coefficient describes the amount of heat that flows in case of fire through the structure that has the expansion joints. For example, the heat transfer coefficient drops below half its original value.

An advantage of such trained expansion joints is that they absorb a deformation of the front surface in case of fire so that the rear surface undergoes substantially no plastic deformation. This is to be understood as meaning that the rear surface deforms so little even in the case of a deformation of the front surface caused by fire heat that the fire-retardant effect of the closure device remains ensured. Thus, in the event of a fire, the expansion joints result in at least partial mechanical decoupling of the front surface and the rear surface.

According to its preferred embodiment, the expansion joints are formed so that the intumescent material is retained between the front surface and the back surface. This refers in particular to the normal case, ie in the event that there is no fire. For example, the expansion joints are formed by slots in, for example, a metal sheet. These slots are so narrow that the intumescent material can not pass through. The expansion joints can be cut or punched, for example. The expansion joints can also be formed by a perforation, which ruptures in case of fire. In other words, the expansion joints may be at least partially formed as predetermined breaking points. Because of their function, the expansion joints can also be referred to as target failure points. This is particularly advantageous when the intumescent material comprises or is a polyurethane foam.

According to its preferred embodiment, the expansion joints are at least partially closed with a sealant. The sealant is designed to seal the expansion joints against leakage of the intumescent material below a firing temperature and release the expansion joints above the firing temperature to permit displacement of the front surface relative to the back surface. For example, the sealant is a solder that is chosen so that it melts in the event of fire. Normally, that is, when there is no fire, the solder is fixed so that it fixes the front surface relative to the back surface. For example, the firing temperature at which the sealant loses its strength may be 100 ° C. But it is also possible to choose the sealant so that a loss of strength occurs only at 200 ° C or even higher temperature.

According to a preferred embodiment, the front surface and the back surface of the first section are interconnected such that the volume increase of the intumescent material causes at least a portion of the intumescent material to enter an intermediate region between the first section and the second section in the event of fire. If the closure device is, for example, a roller door or sectional door, then the individual sections, ie Torlamellen, connected by hinge joints. Since the individual segments move towards each other during winding in the region of the joints, the sections in the region of the joints must be reduced in their material thickness. However, this reduced material thickness means a lower fire retardant effect in case of fire. If the front surface and the back surface of the first section are connected to one another in such a way that intumescent material reaches the intermediate region between the first and the second section in the event of fire, the material weakening between the two sections is compensated and a particularly high fire-retardant effect results.

Particularly preferably, the closure device comprises a plurality of sections, wherein the respective front surface and rear surface are connected to each other so that intumescent material swells in the event of fire between the individual sections. Such a roll or sectional door inhibits the spread of fire particularly effective in the event of fire and is at the same time easy to handle.

The fire retardant closure device is particularly easy to manufacture when the front surface and the rear surface are formed on a one-piece component. Alternatively, the front surface and the rear surface may be formed on like-shaped components which are twisted together by 180 ° for making a section or a single door louver.

According to a preferred embodiment, the closing element is designed as a slide plate, which has a recess for a conveyor, wherein expansion joints are arranged so that the volume increase of the intumescent material causes intumescent material to enter the recess in the event of fire. Such a fire-retardant closure device is a conveyor termination, which is used in case of fire to close an opening in a building part through which a conveyor passes. For example, it may be a support chain conveyor or other conveyor.

The closure device is designed so that in case of fire, the slide sheet the Closing opening largely, wherein the recess prevents the slide blade touches down on the conveyor. The swelling intumescent material enters a gap between the conveyor and the closing element and thus ensures a safe termination point. The advantage of this is that the recess must only roughly correspond to the contour of the conveyor, since any remaining open areas are closed by the intumescent material.

Preferably, the fire-retardant closure device comprises a fixed-field part, which is fixedly connected to the building part, in which the opening is formed, wherein the recess is arranged in the slide blade so that it surrounds the fixed-field part in case of fire. In this case, the fixed-field part favorably has a fire resistance which corresponds to the slide blade in the swollen state.

According to a preferred embodiment, the front surface and / or the rear surface has one or more predetermined breaking points. For example, it can be provided that the predetermined breaking point forms a closed line. Such a fire-retardant closure device is particularly suitable as a delivery point conclusion for separate conveyor technology. An example of a separate conveyor is a roller conveyor. Between two rollers, the closing element or the slide blade can be driven.

However, the maximum distance between two sub-elements of the separate conveyor, in the example between two adjacent rollers of a roller conveyor, limited upwards and usually smaller than the thickness, which must have the fire-retardant closure device in case of fire to safely contain the fire. The predetermined breaking point is preferably designed such that, when the slide blade is closed, it essentially corresponds to an outer contour of the conveyor in the region of the slide blade. In case of fire, the slide blade between the two elements of the separate conveyor technology is driven and the intumescent material expands. As a result, the front surface and the rear surface move apart until one of them faces the respective facing element of the separate conveyor or the separate conveyor encounters. The increasing pressure of the inflating intumescent material causes the predetermined breaking point to break and the front surface to be further spaced from the back surface. In this case, the front surface or the rear surface slides over one of the two sub-elements of the separate conveyor and the gap between the two is filled by the intumescent material. This gives a particularly simple structure for the conveyor system completion.

Figur 1

ein Schließelement einer erfindungsgemäßen feuerhemmenden Verschlussvorrichtung in einer perspektivischen Ansicht,

Figur 2a

eine Detailansicht einer Sektion des Schließelements mit Dehnungsfugen, in einer Ansicht von oben,

Figur 2b

die Ansicht gemäß Figur 2a im Brandfall, nachdem sich intumeszierendes Material ausgedehnt hat und sich die Dehnungsfugen geöffnet haben,

Figur 3a

eine alternative Ausführungsform einer Dehnungsfuge im Normalfall,

Figur 3b

die Ansicht gemäß Figur 3a im Brandfall, das heißt mit geöffneter Dehnungsfuge,

Figur 4

eine alternative Ausführungsform einer erfindungsgemäßen Verschlussvorrichtung in Form eines Förderanlagenabschlusses und

Figur 5

eine weitere Ausführungsform einer erfindungsgemäßen Verschlussvorrichtung in Form eines Förderanlagenabschlusses.

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

FIG. 1

a closing element of a fire-retardant closure device according to the invention in a perspective view,

FIG. 2a

a detailed view of a section of the closing element with expansion joints, in a view from above,

FIG. 2b

the view according to FIG. 2a in case of fire, after the intumescent material has expanded and the expansion joints have opened,

FIG. 3a

an alternative embodiment of an expansion joint in the normal case,

FIG. 3b

the view according to FIG. 3a in case of fire, that is with open expansion joint,

FIG. 4

an alternative embodiment of a closure device according to the invention in the form of a Förderanlagenabschlusses and

FIG. 5

a further embodiment of a closure device according to the invention in the form of a Förderanlagenabschlusses.

FIG. 1 shows a fire retardant closure device 10 in the form of a roller shutter with a closing element 12 which is adapted to completely close an opening, for example in a wall. The closing element 12 comprises a plurality of sections, of which in FIG. 1 a first section 14.1 and a second section 14.2 are shown. FIG. 1 shows the sections in their closed position in which they form a closing surface. Since it is in the in FIG. 1 shown closure device 10 is a roller door, the sections 14.1, 14.2 may also be referred to as Torlamellen.

The sections 14.1, 14.2 are hinged to each other via a hinge joint 16.1, so that they can be wound by means of a suitable drive on a shaft not shown. In FIG. 1 is the closing element 12 in its closed position in which it closes the wall opening. If the sections 14.1, 14.2, ... are wound on the shaft not shown, then the closing element 12 is in its storage position.

The section 14.1 has a rigid front surface 18.1 in the form of a sheet. The section 14.1 also has a rear surface 20.1, which is also formed by a metal sheet. Front surface 18.1 and rear surface 20.1 usually have a distance of at most 50 cm, for example 30 cm. The front surface 18.1 and the rear surface 20.1 are fixed relative to each other, so that the section 14.1 is stable in itself. The front surface 18.1 and the rear surface 20.1, together with a first side member 22.1 and a second side member 24.1 an interior I, is arranged in the intumescent material in the form of a polyurethane foam containing, for example, expandable graphite, aluminum hydrate or similar compounds, the heat Show volume increase.

The front surface 18.1 and the rear surface 20.1 are connected to each other via a rigid first connecting portion 26.1 and a second connecting portion 28.1. Both connecting sections 26.1, 29.1 have a multiplicity of expansion joints 30.1, 30.2, 30.3,..., Which extend parallel to the front surface 18.1 and to the rear surface 20.1. The expansion joints 30.1, 30.2, ... can be closed with a solder that melts in case of fire.

Im in FIG. 1 shown normal case, the intumescent material is enclosed in the interior I and is retained by the expansion joints 30.1, 30.2, ..., so that it can not escape during operation. In case of fire, the intumescent material expands and there is an overpressure in the interior I. If the expansion joints 30.1, 30.2,... Are closed with a solder, this solder melts and the pressure of the intumescent material in the interior I leads to the front surface 18.1 shifts, as shown by the arrow P1 relative to the rear surface 20.1, namely, away from this. By the displacement of the front surface 18.1 relative to the back surface 20.1, the distance increases to, for example, 80 cm or more. This results in a high fire resistance.

The expansion joints 30.1, 30.2, ... can be designed so that when the expansion joints open in case of fire, intumescent material expands into a space 32.1 between the first section 14.1 and the second section 14.2. For this example, expansion joints in the second connecting portion 28.1 designed so that the intumescent material is pressed by the pressure prevailing in the interior I and by gravity in the gap 32.

FIG. 2a shows the first connecting portion 26.1, which is constructed as the second connecting portion 28.1, with the expansion joints 30.1, 30.2, .... The expansion joints 30 (reference numerals without Zählsuffix hereinafter denote the object as such), for example, by cutting, punching or machining have been introduced into the connecting section 26.1 or 28.1.

FIG. 2b shows the connecting portion according to FIG. 2b After intumescent material 34 has expanded in the interior. The expansion joints 30 have opened and the front surface 18 has been spaced from the back surface 20.

It can be provided that the individual expansion joints are designed so that they open differently wide in case of fire. As a result, it can be achieved that the intumescent material 34 can pass through the expansion joints particularly easily there, where, for example, it is particularly secure in the intermediate space 32.1 (cf. FIG. 1 ).

FIG. 3a shows a further embodiment of the connecting portion 26.1, 28.1, in which the expansion joint 30 is formed as a boundary of a deformation structure 36. Deformation factor 36 is part of the page element and designed so that the Front surface 18 can be particularly easily spaced from the rear surface. It is arranged in such a way that the deformation concentrates on a small space area, so that the deformation is provided with very little resistance. Also in this embodiment, the expansion joint 30 may be filled with a solder and closed.

FIG. 3b shows the situation in which the expansion joint has opened due to the pressure of the expanding intumescent material 34 in the event of fire.

The invention has been described for a closure device in the form of a gate. But it is also possible to realize the invention in a door which is suspended in frames. It is also possible to realize the invention in a sliding door or other door. It is also possible to realize the invention in a roller shutter, which may for example also be part of a conveyor system statements.

FIG. 4 shows a further embodiment of a closure device 10 according to the invention in the form of a Förderanlagenabschlusses. The closing element 12 is formed by a slide blade, which has a recess 38. The recess 38 is designed so that when the slide plate 12 is closed, a conveyor 40 can reach through the recess 38. With respect to a direction of movement of the slider blade 12 on the conveyor 40 to behind the conveyor 40, a fixed-field part 42 is arranged. The fixed field part 42 is fixedly connected to the building, in which the opening to be closed by the slide plate 12 is 44. In the closed state exists between the conveyor 40 and the fixed field part 42 on the one hand and the slide plate 12 on the other hand, a gap 46th

FIG. 4 shows the state in which the sliding blade closes the opening 44, but the intumescent material is not yet swollen. The dash-and-dot line, on the other hand, shows the slider blade 12 in the state of being filled with inflated intumescent material. Due to the expansion joint 30, which is shown by way of example, part of the intumescent material swells into the gap 46.

FIG. 5 shows a further alternative embodiment of the closure device, which is designed as conveyor terminator for a separate conveyor 40. The conveyor 40 comprises a first element 48.1 and a second element 48.2, between which the slide sheet 12 can be moved. The rear surface 20 has a predetermined breaking point 50, which substantially corresponds to the outer contour of the conveyor 40.

The thickness of the slider blade 12 is selected to fit between the two elements 48.1, 48.2. In case of fire, the slide plate 12 is moved between the two elements. Due to the heat of the fire, the intumescent material expands and the schematically drawn expansion joints 30 open. When the rear surface 20 comes into contact with the first element 48.1 in the region of the predetermined breaking point 50, the predetermined breaking point 50 breaks. An open surface is created in the rear surface 20. The rear surface 20 is further spaced from the front surface 18 and the rear surface 20 pushes via the conveyor 40, which partly disappears in the open area. The gap 46 between the back surface 20 and the conveyor 40 is filled with intumescent material.

LIST OF REFERENCE NUMBERS

10

closure device

12

closing element

14

section

16

hinge

18

front surface

20

rear surface

22

page element

24

page element

26

first connection section

28

second connection section

30

expansion

32

gap

34

intumescent material

36

deformation structure

38

recess

40

promoter

42

Fixed panel part

44

opening

46

gap

48

element

50

Breaking point

I -

inner space

P1 -

arrow

Claims (15)

Fire retardant closure device, in particular fire retardant gate, with (a) at least one closing element (12) for closing an opening, (B) wherein the closing element (12) has at least one section (14.1, 14.2), the (i) a rigid front surface (18.1) and (ii) has a rear surface (20.1) facing away from the front surface,
characterized in that (iii) intumescent material (34) is arranged between the front surface (18.1) and the rear surface (20.1), and (iv) the front surface (18.1) and the back surface (20.1) are interconnected such that an increase in volume of the intumescent material (34) results in a displacement of the front surface (18.1) relative to the back surface (20.1). Fire-retardant closure device according to claim 1, characterized in that the closing element (12) has a first section (14.1) and at least one second section (14.2) which for forming a closing surface in a closed position and for rolling up into a storage position
attached to each other. Fire-retardant sealing device according to any one of the preceding claims, characterized in that the front surface (18.1) and the rear surface (20.1) by means of a fire protection fabric are connected. Fire-retardant closure device according to one of the preceding claims, characterized in that the front surface (18.1) and the rear surface (20.1) are nonflammable and in particular consist of metal. Fire-retardant closure device according to one of the preceding claims, characterized in that expansion joints (30) are arranged between the front surface (18.1) and the rear surface (20.1), which are designed so that they increase the volume of the intumescent material (34) Allow the front surface (18.1) relative to the rear surface (20.1). A fire-retardant closure device according to claim 5, characterized in that the expansion joints (30) are formed so that when the front surface (18.1) is displaced relative to the back surface (20.1) a heat transfer coefficient for a heat transfer from the front surface (18.1) to the back surface (20.1) decreases. Fire retardant closure device according to claim 5 or 6, characterized in that the expansion joints (30) are formed so that they absorb a deformation of the front surface (18.1) in case of fire so that the rear surface (20.1) undergoes substantially no plastic deformation A fire-retardant closure device according to claims 5 to 7, characterized in that the expansion joints (30) are formed so as to retain the intumescent material (34) between the front surface (18.1) and the back surface (20.1). Fire-retardant closure device according to one of claims 5 to 8, characterized in that - The expansion joints (30) are at least partially closed with a sealant, - wherein the sealing means is designed so that it
below a fire temperature, the expansion joints against leakage of the intumescent material (34) seals and above the firing temperature, the expansion joints (30) to allow the displacement of the front surface (18.1) relative to the back surface (20.1) free. Fire-retardant closure device according to one of the preceding claims, characterized in that - The front surface (18.1) and the back surface (20.1) of the first section (14.1) are interconnected so that the volume increase of the intumescent material (34) causes at least a portion of the intumescent material (34) in case of fire in a space (32) passes between the first section (14.1) and the second section (14.2). Fire-retardant closure device according to Claim 10, characterized in that the front surfaces (18.1, 18.2) and the rear surfaces (20.1, 20.2) of all sections (14.1, 14.2) are connected to one another such that the volume increase of the intumescent material (34) leads to in case of fire intumescent material (34) in all intermediate spaces (32) between the sections (14.1, 14.2) passes. Fire-retardant closure device according to one of the preceding claims, characterized in that the front surface (18.1) and the rear surface (20.1) are formed on a one-piece component. Fire-retardant closure device according to one of the preceding claims, characterized in that (a) the closure member comprises a slider blade (12) having a recess (38) for a conveyor (40), (B) wherein expansion joints (30) are formed so that the volume increase of the intumescent material (34) causes in case of fire intumescent material (34) enters the recess (38). A fire-resistant closing device according to claim 13, characterized by a fixed-field part (42) which is fixedly connected to a building part in which the opening (44) is formed, wherein the recess (38) is arranged in the slide sheet (12) in that Fire case surrounding the fixed field part (42). Fire-retardant closure device according to one of the preceding claims, characterized by a predetermined breaking point (50) in the front surface (18) and / or the rear surface (20).

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