WO2003006775A1

WO2003006775A1 - Fire-proof door

Info

Publication number: WO2003006775A1
Application number: PCT/EP2001/007960
Authority: WO
Inventors: Claus Schwenzer
Original assignee: Effertz Tore Gmbh
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2003-01-23

Abstract

The invention relates to a fire-proof door for a passage, comprising a door leaf with two door leaf surfaces and one door closing device, whereby the door leaf can be closingly displaced from a door leaf receiving area to the passage by means of said door closing device, whereby at least one door leaf surface is covered by an expanding material which when affected by flames or temperature becomes an insulating material. The material can also be expanded by water. Said door leaf can be made from various materials, especially woven fabric material which forms a sort of curtain wall as a fire-proof door. In the unexpanded state, the material is only applied to a thin layer to the door leaf, whereby the layer can expand to many times the original thickness thereof after expansion.

Description

Feuerschutztor

The invention relates to a fire protection door for a passage, consisting of a door leaf, with essentially two door leaf surfaces and a door closing device, wherein the door leaf can be moved from the door leaf receiving area into the passage by means of the door closing device.

Fire protection gates or fire protection doors are known in various configurations. They serve to prevent passages through buildings and similar facilities from excessive disaster in the event of a fire, and to protect people and furnishings that are not in the immediate vicinity of the source of the fire from being attacked by fire or smoldering fire and the associated flue gases and high temperatures. They also serve to prevent or slow down fire destruction to such an extent that the fire brigade has time to arrive before excessive damage has occurred.

It is known to design fire doors in the form of fire doors, which consist essentially of a steel jacket and have glass fiber mats or calcium silicate plates in their inner. These fire protection gates are heavy, bulky and particularly expensive to purchase. Most of the time, people feel annoyed by the doors, which are difficult to open and close. Therefore, there is always a risk with these gates that they will be locked in the open position by people with objects such as door wedges Keep passage clear. This means that fire protection is automatically ineffective in the event of a fire.

It is not absolutely necessary that fire doors must always be closed. It is also known to use gate closing devices which automatically close the doors or gates in the event of a fire alarm, so-called hold-open systems. With fire protection gates, these gate closing devices have to offer a very solid mechanism and a solid drive, which make it possible to lock the fire protection gate safely, since the known fire protection gates have a high weight.

The object of the invention is to eliminate the above-mentioned disadvantages of the generic fire protection gate.

As a solution, it is proposed according to the invention that essentially a door leaf surface carries a material which foams up under the action of flame or temperature to form an insulating material.

The advantage of this invention lies in the light and inexpensive construction which is possible with such a fire protection door. The small space requirement offers a multitude of new possibilities for making fire protection gates rigid and / or flexibly movable. It is easier to find space in small reception areas and the gate closing device can be much easier because it no longer has to carry and move as much mass. The door leaf itself does not have to be made of a heavy material, because the full fire protection effect is achieved by the material foaming under the influence of temperature.

Various companies offer foaming insulating material under the influence of temperature, which is only about 1.9 mm thick. At a temperature of around 160 ° C, the fabric foams to a thickness of 8.5 mm. The maximum foaming of this material is achieved at around 390 ° C.

An advantageous feature of the invention provides that the door leaf is guided in a slot-shaped guide and the door leaf with non-foamed material narrower than the gap in which it is guided and the door leaf with foamed material is wider than the gap in which it is guided. In the event of a fire, the fire gate closes just like a fire gate known from the prior art. The fabric foams up and closes the narrow gaps in the guides and on the lintel in which the fire protection door is guided. The insulation then acts on the one hand as thermal insulation of the surface, on the other hand as a seal of the correspondingly narrow gaps in the guides and on the lintel, so that both the passage of flame and the escape of smoke are reliably prevented.

A further feature of the invention provides that at least one door leaf surface carries a material which foams under the influence of water to form an insulating material. Controlled by a smoke detector, such a substance can be briefly sprinkled with water until the insulating material has foamed. Then the water can be turned off if necessary. The advantage of this embodiment of the fire protection door according to the invention is that the smoke detectors often react earlier than the substances reacting to heat or flame, so that the passage is closed at an earlier point in time to provide complete fire protection. When the fire is reached, the insulating material is fully foamed. In particular, the foaming of the insulating layer already provides a seal when smoke reaches the passage that does not carry any heat. The smoke detectors detect the smoke, whereupon the fire gate closes and is sprinkled with water until the foaming is complete. The sprinkling of water can be stopped after the material has been foamed as soon as the insulating layer has formed in order to counteract unnecessary destruction by water in the event of a false alarm.

The invention is advantageously designed in such a way that the door leaf surface is formed from at least one layer consisting of fabric and the fabric carries a material which foams under the action of flame or temperature and / or under the action of water to form an insulating material. Such a fabric can carry the fabric on the fabric surface as well as in the structure of the fabric, for example by soaking the fabric with the foaming substance. It goes without saying that this fabric is not can only be applied to the surface of a further carrier material. The fabric carrying the foaming substance can be used independently as a fire gate. The essentially flat fabric is brought into the passage by the corresponding gate closing device and closes it. The fabric can then foam up and take full effect. Such a fire protection door can be installed in one passage in an extremely space-saving and less cost-intensive manner, with little effort with regard to the door leaf receiving area and the door closing device. All that is required is secure guidance of the door leaf.

Another feature of the invention according to the invention provides that the fabric consists of textile, glass, metal or ceramic, optionally of combinations of these or other materials, preferably metal threads. This provides materials for the fabric which, on the one hand, guarantee a high strength of the fabric when manufactured accordingly and, on the other hand, have a certain flexibility to accommodate the door leaf in a space-saving manner. According to our own investigations, such a material can be sewn, is extremely cost-effective and can withstand well over 10,000 movements without suffering any significant damage.

A particularly advantageous embodiment of the invention is such that the material which foams up to form an insulating material is applied to carrier materials, such as steel sheets, steel roller shutter profiles, fire protection panels. In this way, conventional sheets and roller shutter profiles can be provided with a certain level of fire protection. Furthermore, fire protection gates designed in this way offer the possibility of utilizing the advantages, low weight, small space requirement, great geometric freedom and cost savings of the foamable material in the event of fire, and additionally the advantages of the carrier materials provided according to the invention. The main advantages of these materials are their simple handling, which is well known to those skilled in the art, and their exceptional heat resistance.

Furthermore, the inventive embodiment is advantageous in that a fabric or film protecting against mechanical action is additionally applied to the foaming substance. One to protect the Foam serving fabric or a film have the advantage that a door leaf, which may be often opened or closed, fully fulfills its fire protection function over a long period of time. It is also conceivable that if the door leaf is present in the door leaf receiving area, two surfaces of the door leaf lie against one another and thereby become damaged over time. A fabric or film on the surface can prevent this damage in a simple and inexpensive way without affecting the functionality of the fire protection door.

Another embodiment of the invention provides that the door leaf is rolled up on a shaft in the door leaf receiving area. Another advantageous embodiment of the invention provides that the shaft is driven by a drive. The door leaf can accordingly be present, for example as a flat, flat fabric carrying the foaming material or as a roller door. The door leaf can be rolled up very easily on the shaft and only little space is required for the door leaf receiving area. In the event of a fire, the shaft is turned by means of the drive and the door leaf, preferably along guides, is brought into the passage. The drive can have different configurations. As a rule, it will be provided as an electrically driven motor, which is fastened, for example, directly to the shaft or interacts with the shaft via a gear or via a belt or chain drive. It is particularly advantageously provided with the fire protection door that the drive is a manual drive, preferably a reel wheel with a reel chain. Such a drive is particularly useful in the light fire door according to the invention. The reel wheel is connected to the shaft according to the invention on which the door leaf is located. The reel chain lies above the reel wheel, so that a rotation can be transmitted to the shaft with the reel chain and the fire gate can thus be moved. The gate is kept open with a magnet. In the event of an alarm, the smoke detector interrupts the current to the electromagnet and the gate closes automatically, preferably due to the dead weight of the gate. It is advantageously provided that the fire protection door has an eddy current brake which limits the closing speed. The controlled closing fire protection gate largely prevents injury to people in the immediate vicinity of the closing fire protection gate. This also serves to protect people Controlled lowering of the gate to prevent wedging or damage to the protective surface of the gate. A person skilled in the art knows many different ways to design a safe drive for a shaft that carries a door leaf. Various forms of waves are also known from the prior art, which meet the requirements necessary for such a fire protection door.

Another embodiment of the invention provides that the door leaf has a loop in the closed state, which is formed from two essentially flat surfaces and a deflection connecting the surfaces, closes the entire passage, and has an air cushion within the loop. The main advantage of this configuration is that an air cushion is formed between the two flat surfaces, thus achieving a still significantly improved protective effect. As such, this invention is best suited for a fire door that extends from the ceiling of the passageway to the floor. In this way, the loop is formed automatically by the weight of the door leaf. However, it is also possible, by suitable guiding of the door leaf, to pass the door leaf into the passage from the wall sides or from the floor. In addition to the formation of a strongly insulating air cushion, the advantage of the flat surfaces lying one behind the other is also relevant. In the event that one surface of the door leaf is destroyed, for example by the fire, the next surface is still present and can stop the fire. It goes without saying that several loops of a door leaf can be arranged one behind the other, so that a large number of loops is formed, with the associated plus in terms of security. However, this involves a significantly increased effort.

The invention advantageously provides that one end of the loop is rolled up on the shaft and the other end is fastened on the same side surface of the closed passage as the door leaf receiving area and the deflection is on the opposite side surface of the closed passage. Thus, the door leaf can be brought into the passage at one end via the shaft and is attached at the other end to the same side surface of the passage as the shaft, so that a loop is formed. This allows a loop to be placed in a simple, space-saving manner with the advantages mentioned above. The fixed end of the door leaf can be connected to the fire door holder, for example, by screws in the side surface. In addition, in order to ensure uniform fastening across the entire width of the door leaf, a perforated strip can be screwed over the fixed end of the door leaf, as is also known from carpets that are attached to the floor with carpet strips. The deflection is on the opposite side surface of the end mounted on the shaft and the fixed end. It is particularly advantageous if the loop with the deflection hangs down from the ceiling. Since the redirection can be a weak point of the loop, it makes sense to let the loop hang down from the ceiling, since the flames usually have their most intense point of attack in the area of a passage near the ceiling.

Another feature of the invention provides that the deflection of the loop is formed around a roller, preferably a tube. By using a tube, it is possible to give the deflection a defined shape and to ensure that the door leaf closes the passage properly with the deflection on the side surface intended for it. The shape of a roll has the advantage over other shapes that it is rotationally symmetrical. If the door leaf is brought into the passage, the roller can turn in the progressive redirection without any problems and regardless of the number of rotations that the roller has carried out in the redirection, the roller with the redirection is always correctly on the side surface of the intended Passage and gives the deflection the necessary guidance and rigidity.

Another advantageous embodiment of the invention provides that the roller is held at its ends in a guide. By means of the guide, a possibility is created to prevent the roll from tilting or slipping and to additionally ensure that the roll completely fulfills its function as a guide for the deflection. For this purpose, for example, a pin can be located in the longitudinal axis at the ends of the roller as an extension, which in the profile rails in the side surfaces of the roller that are perpendicular to the roller Passage. Further roller guides are known to the person skilled in the art.

The invention is advantageously designed such that the door leaf receiving area lies in the ceiling, the loop extends with the deflection towards the floor and the flat surfaces are tensioned by the weight of the roller located in the deflection. Such an arrangement of the fire protection gate is simple and can be installed in one pass with relatively few elements and is therefore inexpensive. Due to the weight of the roller, the flat surfaces of the door leaf are stretched and lie securely in the guides and grooves intended for them. Furthermore, it is also possible to dispense with a drive for the shaft if the weight of the roller is selected sufficiently to ensure that the door leaf also rolls off the shaft. This means that the passage can still be securely closed even in the event of a power failure. In the event of a fire, only one lock on the shaft needs to open and the gate closes automatically.

As a possible advantageous embodiment of the invention, it is provided that the roller tensions the flat surfaces of the loop by means of an additional force-applying device, preferably acting on the ends. In this way it is possible to safely guide heavier fire gates with such a role. A role that a door leads into the passage from the sides of the wall is moreover, unless special circumstances exist, best performed with a separate mechanical device.

Another feature of the invention provides that two or more door leaves are arranged one behind the other in the passage to be closed. By arranging two door leaves one behind the other, a fire protection door can provide far greater security than a fire protection door with only one door leaf. A particularly long-lasting fire may have weakened the door leaf that was initially attacked, so that a second door leaf stops the fire again for a longer period of time. In particular, a second door leaf can ensure additional thermal insulation, since insulating air cushions are located between the door leaves and in the loops mentioned above form. Both simple and looped door leaves come into question as door leaves.

Another feature of the invention provides that two or more door leaves are arranged one behind the other in the passage to be closed and the shafts are driven by a common drive. Thanks to the common drive, several door leaves can be unrolled at the same time without taking up a lot of space in the passage and causing unnecessary costs.

Another advantageous embodiment of the invention provides that the door leaf can be brought vertically into the passage.

A further advantageous embodiment of the invention provides that the door leaf can be brought horizontally into the passage.

Another advantageous embodiment of the invention provides that the door leaf is designed as a movable, flexible curtain. Such a curtain does not take up much space in the door leaf receiving area and can be easily adapted to spatial conditions, because it can be brought into almost any shape by a suitable guide. There is also the essential advantage in the production that such a flexible and movable material, in particular made of fabric, can easily be mass-produced and only the gate closing device has to be adapted to the circumstances on site. The door leaf can be manufactured in webs and brought into the required size and shape on site. This cannot be achieved with conventional fire protection gates. Furthermore, a curtain has the advantage that people with sharp-edged tools can get through. A conventional fire door can wedge under the influence of heat in the door frame and can no longer be opened without heavy tools.

A further advantageous embodiment of the invention provides that the door consists of only one door leaf, which is rolled up on the shaft so that it rolls off and just hangs down and closes off the passage from the ceiling side. Such a gate corresponds to the conventional one and usually used gates, with the difference that it carries the foaming substance according to the invention and can therefore be used excellently as a fire protection gate. The main advantage lies in the well-known handling of the fire gate and the well-engineered techniques to spend it in the passage to be closed. Conventional roller doors can also be upgraded to fire protection doors by suitable application of the foaming substance.

Furthermore, an advantageous embodiment of the invention provides that the door leaf is designed like a theater curtain, with it being folded in the open in the door leaf receiving area and, in the event of fire, unfolding the passage to close it. Such a curtain can be brought into the passage with few means and takes up little space.

A further feature of the invention provides that the door leaf is formed from a plurality of sections which overlap like roof tiles and are displaceable relative to one another. These sections can all be of the same design and lie flush side by side in the door leaf receiving area. In the event of a fire, the sections are shifted against each other by the gate closing device and are offset overlapping in the passage like roof tiles.

Another feature of the invention provides that the door leaf can be brought as a one-piece rigid surface in front of the passage. The door leaf is therefore similar to handling a plate or a door. The plate is preferably applied to a side surface of the passage, for example on the ceiling side or on the wall side, by being fastened in a guide along two parallel axes. There the plate is ready for a fire. One axis lies directly on one of the edges of the plate that are perpendicular to the direction of passage and offers only two degrees of freedom. One degree of freedom is a rotation around the axis and the second degree of freedom is the displacement along the guide which is located on the side surface on which the plate lies in parallel. The second axis is spaced somewhat parallel to the first axis on the plate and also allows two degrees of freedom. One degree of freedom is a rotation around the axis and the second degree of freedom is a displacement along a guide that allows the axis to be displaced in the passage. The axes are only of geometric importance for the description and are to be understood as axes of rotation, wherein the rotation can be realized by appropriate means available to the person skilled in the art. The axes of rotation can be formed, for example, by bolts which are firmly connected to the plate and lie in one of the guide rails. Other options for swiveling plates in one pass are well known and should not be listed in detail. The best known example is probably the simple door.

Another feature of the invention provides that gaps and openings are provided with additional sealing strips, which carry the material which foams up in the event of fire to the insulating material. In many cases, with a suitable guidance of the door leaf in the guide, it will be completely sufficient for the door leaf to expand due to the foaming substance and to seal the guide, the lintel, etc. in a temperature-insulating manner against smoke and fire penetration. However, it may be possible that the expansion of the door leaf is not sufficient due to certain construction methods. In this case, it makes sense to provide the foaming material additionally on the guide, the lintel, etc., so that the material located there foams against the door leaf and further gaps can be sealed. Such use of the foaming substance is generally sensible, even if the gaps to be foamed are not very wide, because this ensures greater security.

Another advantageous feature of the invention provides that the door leaf is guided in a groove located in a side surface of the passage and a sealing strip is fastened to a groove surface parallel to the door leaf. In this way, the groove in which the door leaf is guided is foamed with additional insulating material in order to ensure a reliable sealing of the edge area at the passage.

Another advantageous feature of the invention provides that the door leaf is located in a narrow gap between a guide shaft and a surface of the passage that is essentially parallel to it. In this way, in particular on the lintel with a door leaf guided into the passage from the ceiling side surface, for a secure seal in the ceiling area be taken care of. The door leaf is held close to the parallel surface of the passage or lintel by the guide shaft and provides a secure seal in the event of the material foaming. Due to the foaming, the door leaf cannot move away from the lintel.

Further advantages and features of the invention can be found in the figures and the description of the figures.

Fig. 1 shows a perspective view of a fire protection door according to the invention, with two door leaves.

2 shows a perspective view of a fire protection door according to the invention, with a door leaf designed as a loop.

Fig. 3 shows a schematic drawing of a guide of the fire gate according to the invention.

Fig. 4 shows a schematic drawing of a guide shaft according to the invention for the fire gate.

1 shows a fire protection door according to the invention, which closes a passage 11. The fire protection door consists of two door leaves 12 which are arranged one behind the other in the passage 11. The door leaves 12 consist of silicone fabric and are coated on both sides with material that foams under the influence of temperature to form insulating material. Furthermore, the door leaves 12 are rolled up on shafts 14, which are located in a door leaf receiving area 13 in the ceiling side surface. The shafts are driven by a drive 17, which in this case is an electric motor 17. The motor 17 is connected to the shaft 14 by means of gears 15 with a chain 16. The two shafts 14 are also interconnected via gears 15 and a chain 16. The dimensions of the door leaves 12 are somewhat wider than the passage 11. The protruding edges of the door leaves 12 are guided in guides 18. The fact that the edges are in the guides 18 or grooves ensures a secure sealing of the passage 11. The fabric in the edge area foams under the influence of heat and closes the grooves 18. There is generally no groove in the bottom of the passage 11. The seal is made at this point by a sealing strip 112 of the gate against the smooth floor. On the end strip 112 is also the material foaming under the influence of heat. A closure also occurs in the ceiling area when exposed to heat. The material on the shaft 14 foams and closes the gap between the shaft 14 and the lintel, which is located on the inner surface 110 of the door receiving area 13 that runs parallel to the shaft in order to be able to seal the wide gap between the inner surface 110 and the shaft 14 because of the development. In order to counteract possible manipulation of the fire protection door, a cover plate 19 is provided for the door leaf receiving area 13, which runs at the same height as the ceiling and leaves only two narrow gaps through which the door leaves are guided.

Fig. 2 is a perspective view of a fire gate in a passage 21. The fire gate consists of a door leaf 22 formed as a loop, with two flat surfaces 210 and a deflection 211 around the roller 29. One end of the door leaf is with one in the Ceiling bolted perforated strip 212 fastened in the ceiling of the door leaf receiving area 23. The other end is rolled up on the shaft 24. The shaft 24 is driven by means of a drive 27 via gear wheels 25 and a chain 26. The flat surfaces 210 are tensioned by the weight of the roller 211. The roller 211 is guided in an additional roller guide 213 in order to keep the door leaf 22 clean in the guide 28. For this purpose there is a pin at the ends of the roller 211 which slides in the roller guide 213. A sealing strip 214 is located above the shaft 24 over the entire width of the door receptacle 23. Alternatively, two rollers 211 guided at the same height can be provided in order to extend the deflection 29 to a lower surface, as a result of which an improved sealing at the bottom of the passage 11 is achieved , It is of course also to ensure a higher level of security that a plurality of loop-shaped door leaves 22 are arranged one behind the other. A drive 27 can drive several shafts 24. A guide 32 can be seen from FIG. 3, which lies in a side surface 36 of the passage. The essential components of the guide are a guide rail 35 and fabric receiving areas 34 for the material foaming under the influence of heat to the insulating material. In the guide there is the edge of the curtain-like door leaf 31 made of fabric with the hook 33 attached to the outer end, which can also be designed as a roller. The guide rail 35 consists of two sheets, between which the outer edge region of the door leaf 1 is guided. The gap between the rails forms a distance "S" which must be greater than the fabric thickness with the foaming substance located thereon, but smaller than the thickness after the foaming. In the fabric receiving areas 34, a sealing strip is provided for additional sealing, which seals the foaming Wearing fabric.

Fig. 4 shows a shaft 44 from which the door leaf 45 is rolled. The door leaf 45 is guided between the guide shaft 43 and the lintel 41. At the same height as the guide shaft 43, there is a fabric receiving area 42 in the lintel 41, in which there is a sealing strip. When exposed to heat, the foaming material on the door leaf 45 formed of fabric and the fabric of the fabric strip in the fabric receiving area 42 will foam and block the passage in the area of the lintel 41 for smoke and flames.

LIST OF REFERENCES

11 passage 31 door leaf

12 Door leaf 32 guidance

13 Door leaf receiving area 33 hooks

14 Wave 34 fabric intake area

15 gear 35 guide rail

16 chain 36 passage side surface

17 Motor / drive

18 Guide / groove 41 passage side surface / lintel

19 Cover plate 42 Fabric receiving area

110 inner surface 43 guide shaft

111 sealing strips 44 shaft

112 end strip 45 door leaf

21 round

22 door leaf

23 Door leaf receiving area

24 wave

25 gear

26 chain

27 Motor / drive

28 leadership

29 roll

210 flat surfaces

211 redirection

212 perforated strip

213 roller guide

214 sealing strips

Claims

Patent claims

1. Fire gate for a passage, consisting of a door leaf, with essentially two door leaf surfaces and a door closing device, wherein the door leaf can be moved by means of the door closing device from a door leaf receiving area into the passage, characterized in that at least one door leaf surface is exposed to flame or temperature an insulating material that foams.

2. Fire protection door according to claim 1, characterized in that the door leaf is guided in a gap-shaped guide and the door leaf with non-foamed material narrower than the gap in which it is guided and the door leaf with expanded material wider than the gap in which it is guided is.

3. Fire protection door according to claim 1 or 2, characterized in that essentially a door leaf surface carries a foaming under the action of water to an insulating material.

4. Fire protection door according to one of claims 1 to 3, characterized in that the door leaf surface is formed from at least one layer consisting of fabric and the fabric bears under the action of flame or temperature and / or under the action of water to an insulating material.

5. Fire gate according to claim 4, characterized in that the fabric is made of textile, glass, metal or ceramic, optionally from combinations of these or other materials, preferably metal threads.

6. Fire protection door according to one of claims 1 to 5, characterized in that the foaming to an insulating material is applied to carrier materials such as steel sheets, steel roller shutter profiles, fire protection panels.

7. Fire gate according to one of claims 1 to 6, characterized in that in addition to the foaming substance a protective fabric or a film is applied to protect against mechanical action.

8. Fire protection door according to one of claims 1 to 7, characterized in that the door leaf is rolled up on a shaft in the door leaf receiving area,

9. Fire gate according to claim 8, characterized in that the shaft is driven by a drive.

10. Fire protection door according to claim 9, characterized in that the drive is a manual drive, preferably a reel wheel with a reel chain.

11. Fire gate according to one of claims 1 to 10, characterized in that the fire gate has a closing speed-limiting eddy current brake.

12. Fire protection door according to one of claims 1 to 11, characterized in that the door leaf has a loop in the closed state, which is formed from two substantially flat surfaces and a deflection connecting the surfaces, close the entire passage, and an air cushion within the Has loop.

13. Fire protection door according to claim 12, characterized in that one end of the loop is rolled up on the roll and the other end is fastened on the same side surface of the closed passage as the door leaf receiving area and the deflection is on the opposite side surface of the closed passage ,

14. Fire gate according to claim 12 or 13, characterized in that the deflection of the loop around a roller, preferably a tube, is formed.

15. Fire gate according to claim 14, characterized in that the roller is held at its ends in a guide.

16. Fire protection door according to claim 15, characterized in that the door leaf receiving area is in the ceiling, the loop extends with the deflection towards the floor and the flat surfaces are tensioned by the weight of the roller located in the deflection.

17. Fire protection door according to claim 16, characterized in that the roller tensions the flat surfaces of the loop by an additional, preferably end-acting, force-applying device.

18. Fire gate according to one of claims 1 to 17, characterized in that two or more door leaves are arranged one behind the other in the passage to be closed.

19. Fire gate according to one of claims 8 to 18, characterized in that two or more door leaves are arranged one behind the other in the passage to be closed and the shafts are driven by a common drive.

20. Fire protection door according to one of claims 1 to 19, characterized in that the door leaf can be brought vertically into the passage.

21. Fire gate according to one of claims 1 to 20, characterized in that the door leaf can be brought horizontally into the passage.

22. Fire protection door according to one of the preceding claims, characterized in that the door leaf is designed as a movable, flexible curtain.

23. Fire gate according to one of the preceding claims, characterized in that the gate consists of only one door leaf, which unrollable is rolled up on the shaft and unrolled just hangs down from the ceiling and closes the passage.

24. Fire protection door according to one of the preceding claims, characterized in that the door leaf is designed like a theater curtain, wherein it is folded in the open state in the door leaf receiving area and in the event of fire, the passage is unfolded closing.

25. Fire protection door according to one of claims 1 to 21, characterized in that the door leaf is formed from several overlapping roof tile-like, mutually displaceable sections.

26. Fire protection door according to one of claims 1 to 21, characterized in that the door leaf can be brought as a one-piece rigid surface in front of the passage.

27. Fire protection door according to one of claims 1 to 26, characterized in that gaps and openings are provided with additional sealing strips, which in the event of fire are used to foam the insulating material.

28. Fire protection door according to one of claims 1 to 27, characterized in that the door leaf is guided in a groove located in a side surface of the passage and a sealing strip is fastened to a groove surface leading parallel to the door leaf.

29. Fire protection door according to one of claims 1 to 28, characterized in that the door leaf is located in a narrow gap between a guide shaft and a substantially parallel surface of the passage.