EP2326784B1 - Vertical lift door - Google Patents

Description

The invention relates to a lifting gate, in particular a high-speed industrial door, according to the preamble of claim 1.

Such a lifting door is for example from the WO 91/18178 known. This is suitable for a high-speed operation of up to 3 meters per second and, when closed, offers an excellent seal against wind and weather attack as well as security against unauthorized opening. In addition, this known lifting door can be moved with a low noise. It has proven itself in practice with great success.

In this case, it has proved to be particularly advantageous that the hinge straps form the supporting frame of the lamellar armor and absorb all forces resulting from the movement of the lifting door. Since these hinges are supported and guided in the guideways at the same time, a very fast running of the lifting door is possible without the movement is uneven or restless. The high-speed characteristics of this known lifting door are further supported by the fact that the lamellae is guided in the area of the lintel without contact in a winding, which is predetermined by corresponding spirally guided sections of the guideways.

The individual lamellae are placed with such a distance from each other on the hinge members of the hinge straps that each adjacent lamellae by means of the hinge strip against each other are angled. In this known example, a gap is formed at a distance of adjacent lamellae, in which engage the hinge pin of the hinge bands. By providing the pivot axis of each hinge within the space between the slats, on the one hand, the angular openings between the adjacent slats and, on the other hand, the tilting accelerations when entering the upper guideways are minimized. This is associated with correspondingly smaller acceleration forces when bending and the consequently possible higher running speeds of the lifting gate.

Adjacent lamellae of this conventional lift gate are provided approximately over the entire width of the gate, each with sealing strips, which provide a wind-tightness and prevent the ingress of rainwater and dust. In addition, they also ensure a mechanical stability of the slats with each other. As a result, the lamellae in the closed position withstands even larger wind loads without being bulging or being deformed. Here, these sealing strips have thickenings which engage in correspondingly formed recesses on the mutually facing side edge sections of two adjacent lamellae.

The lifting gate according to the WO 91/18178 has proved very successful as a high-speed industrial door, but it provides only a very limited fire protection function. On the other hand, fire protection door arrangements have become known with which a space closure with high fire resistance effect to be produced. For the assessment of the fire resistance here three criteria are set: Firstly, the fire protection gate assembly must have sufficient intrinsic stability in order to maintain the room closure even in a fire for at least a predetermined period of time. Another criterion is the flame resistance, ie the time until flames can penetrate the other side of the goal. As a third criterion, the insulation effect of the fire protection curtain is taken into account, wherein the temperature on the non-fire side is not may increase more than a predetermined value in a given time. In order to meet these requirements, conventional fire protection door assemblies often have a relatively high weight and therefore can only be operated very slowly.

An example of a fire protection door assembly can be found in the NL 1013381 , which discloses a lift gate with a lamellar armor. Here, fire protection elements are arranged on a side edge section of a lamella facing an adjacent lamella, wherein these fire protection elements consist of a material which expands under thermal action and closes a gap between the side edge sections of adjacent lamellas.

Furthermore, from the AT 351 736 a roller shutter with the features of the preamble of claim 1 become known. Also the WO 2007/142079 A1 discloses a lifting gate with the features of the preamble of claim 1. The present invention is based on the WO 2007/142079 A1 out.

It is therefore an object of the present invention to provide an improved lift gate, which is suitable for high-speed operation and at the same time provides fire protection properties.

This object is achieved by a lifting gate with the features of claim 1.

By thus produced according to the invention seal on the nature of a labyrinth seal on the mutually facing side edge portions of adjacent slats, a resistance force is generated against the passage of gas from one side of the slats to the other side, which suppresses such gas passage. Such gases can thus not pass straight through the lamellae, but are deflected and decelerated or stopped as in a labyrinth.

At the same time a penetration of flames is prevented in case of fire, since the rectilinear path through the lamellar shell is blocked.

Since the slats of such a lifting gate are typically made of metal and preferably made of aluminum, they withstand the temperatures and thus an effective Torabschluß is achieved in case of fire.

In addition, a possible offset of the two adjacent lamellae is effectively prevented by the intermeshing of the two side edge sections. This is particularly important if the individual blades are exposed to a different heat and therefore a subject to different levels of bending deformation. According to the invention, the lamellar armor remains in this case as a closed unit and forms an effective Torabschluß to prevent the passage of flame.

It is a further advantage if at least one fire protection element made of a material is arranged on at least one side edge section of a lamella facing an adjacent lamella, which expands under thermal action and closes a gap between the side edge sections of adjacent louvers. This is still a achieve more reliable shielding of one side of the lamellar armor against the other side. Thus, for example, combustible elements, which are mounted on one side of the lifting door, are even more reliably shielded against a radiation power of the source of fire on the other side of the door. This improves the fire protection function of the lifting door according to the invention, wherein this is possible at the same time with low design complexity and using materials known per se. In practice, for example, a material from the product range "FIREFLY" from TENMAT GmbH has proven to be particularly suitable for such a fire protection element. For example, "FIREFLY 102" is capable of expanding to 25 times its original thickness when fired, effectively sealing openings.

In this case, at least two fire protection elements according to the invention are present on the at least one side edge section, wherein these are arranged on both sides of a projection on the flanks thereof as well as on the large surfaces of the lamellar armor. Thus, regardless of the side on which the fire is present, achieve a reliable shield for the other side of the lift gate. In addition, the fire protection elements can then successively come into effect and thus further improve the stability of the lifting door according to the invention in case of fire.

Advantageous developments of the invention Hubtores are the subject of the dependent claims 2 to 7.

Thus, the side edge portion of a lamella may be provided in cross-section with a projection, while the side edge portion of the associated adjacent lamella is recessed in cross-section in the central region, so that the projection engages positively in the recess when the lifting gate is closed. In this way can be achieved with structurally simple means an advantageous complementary formation of the side edge portions of two adjacent lamellae.

If a sealing element extending essentially over the width of the door opening is arranged on at least one side edge section of a lamella facing an adjacent lamella, a possible gas transfer in the event of a fire can be prevented even more reliably. In addition, such a sealing element supports the wind-tightness of the lamellar armor. Thus, a lift gate with improved closing as well as fire protection properties can be provided with simple structural means.

The fact that the sealing element is formed from a flame-retardant elastomer, it holds a fire load in a particularly good way withstand. As a result, the fire protection properties of the lifting door according to the invention improve. Suitable materials for this purpose are, for example, chloroprene or silicone.

It has proven to be advantageous if a gap between the projection and a side wall of the recess at the side edge portions is at least three millimeters wide. Then, on the one hand, there is enough space to allow undisturbed bending of the individual slats against each other, for example, in a spiral section in the lintel area, and, secondly, to keep the gap narrow in order to prevent the passage of hot gases etc. through the labyrinth seal as reliably as possible. Especially in high-speed operation, it has proved to be advantageous if this gap is at least five millimeters and in particular at least seven millimeters wide. In this case, such gap widths are particularly uncritical in a fire, especially if there is a fire protection element in the area between the two associated lamellae, which expands under the influence of heat and readily able to close even a gap of seven millimeters or more.

In addition, the lifting door according to the invention in a further embodiment may also have a bottom-side closure element, which is preferably formed from a flame-retardant elastomer, wherein the closure element at least one fire protection element is arranged of a material which expands under thermal action and possibly a gap between a bottom slat and a bottom closes. In this way, a reliable conclusion to avoid a crossing of hot gases or a flameout is also achieved on the bottom side of the lifting gate according to the invention. All the more so if a flame-retardant elastomer is used as a material for the bottom-side closure element. But even if this final element of the heat can no longer withstand, then can be produced by the foaming or swelling of the fire protection element a reliable conclusion in this area.

In this case, it is also possible that the closure element is designed as a hollow profile, wherein the at least one fire protection element is present in the cavity of the closure element. The fire protection element is then protected within the terminating element arranged in general operation and ultimately only effective when the terminating element is destroyed due to thermal influence and there is a risk that a gap could arise on the bottom side of the invention Hubtor. The fire protection function of the Hubtors invention is thereby further improved.

Fig. 1

eine Vorderansicht eines erfindungsgemäßen Hubtores;

Fig. 2

eine Seitenansicht des erfindungsgemäßen Hubtores im Schnitt;

Fig. 3

eine Draufsicht des erfindungsgemäßen Hubtores im Schnitt;

Fig. 4

einen Detailschnitt durch den Lamellenpanzer des erfindungsgemäßen Hubtores;

Fig. 5

ein Detail mit aufeinander zuweisenden Seitenrandabschnitten von zwei benachbarten Lamellen nach Fig. 4;

Fig. 6

eine Seitenansicht einer Lamelle;

Fig. 7

einen Schnitt durch eine Seitenzarge;

Fig. 8

einen Schnitt durch einen Wickelkasten am Torsturz;

Fig. 9

ein Detail aus Fig. 8 mit dem Einlaufbereich des Lamellenpanzers in den Wickelkasten; und

Fig. 10

eine Detailansicht eines bodenseitigen Abschlusselements eines Lamellenpanzers.

The invention will be explained in more detail in exemplary embodiments with reference to the figures of the drawing. It shows:

Fig. 1

a front view of a lifting gate according to the invention;

Fig. 2

a side view of the invention Hubtores in section;

Fig. 3

a plan view of the invention Hubtores in section;

Fig. 4

a detail section through the lamellar armor of the invention Hubtores;

Fig. 5

a detail with facing side edge portions of two adjacent lamella after Fig. 4 ;

Fig. 6

a side view of a blade;

Fig. 7

a section through a side frame;

Fig. 8

a section through a winding box on the gate lintel;

Fig. 9

a detail from Fig. 8 with the inlet region of the lamellae in the winding box; and

Fig. 10

a detailed view of a bottom end element of a lamellar armor.

In the FIGS. 1 to 3 three views of a lifting gate 1 are shown, which is designed as a high-speed industrial door. It has a door leaf in the form of a laminated armor 2, which is held and guided in side frames 3 on both sides, and a winding box 4, which is arranged in the lintel area and the lamellar shell 2 accommodates in open door leaf.

As can be seen from the figures, 3 guide tracks 31 are arranged in the two side frames, which run upright in the region of the door opening and have a spiral course in the winding box. The lamellae 2 can thus be arranged without contact in the winding box 4 with the lift gate 1 open.

As in Fig. 4 can be seen in more detail, the lamellar armor 2 hinge bands 21, which are each adjacent to the guideways 31 arranged laterally on the lamellae 2. In Fig. 4 only one of the hinge bands 21 can be seen. The hinge bands 21 have hinge members 22 which are hingedly connected together by means of hinge pins 23 and thus are angled away from each other.

In addition, the lamellae 2 has a plurality of fins 24 (see. Fig. 6 ), which are placed on the hinge members 22 and fixed thereto. As in particular from the FIGS. 4 . 5 and 7 can be seen, the individual blades 24 are coupled at their longitudinal ends with roller axles 25 which carry guide rollers 26. These engage in guideways 31. The hinge straps 21 are thus indirectly supported and guided in the guideways 31. The fins 24 are made in the present example of an aluminum alloy.

In that regard, the structure of the lifting gate 1 substantially corresponds to a conventional high-speed industrial door, as exemplified in the WO 91/18178 is explained.

In Fig. 5 is shown in more detail how mutually facing side edge portions of adjacent blades 24 are configured. Thus, an upper side edge section 241 of a lower sipe 24 engages positively in a lower side edge section 242 of an upper sipe 24. For this purpose, a projection 243 is formed on the upper side edge portion 241. At the upper end of the projection 243 while a sealing element 27 is disposed of the material chloroprene, which is fixed in a mounting groove on the projection 243. The material chloroprene is characterized by its good fire protection properties, since it is flame retardant. The lower side edge portion 242 has a recess 244 which is bounded laterally by two side walls 245. Fig. 6 shows the cross-sectional shape of such a blade 24th

As in Fig. 5 is shown, overlap the projection 243 and the side walls 245 at the respective associated side edge portion, so that here a labyrinth is formed, which makes it difficult in the manner of a labyrinth seal a flow of gases such as air and in particular from heated air. By the arrangement of the sealing element 27 while the gas passage is completely suppressed in the closed lifting door 1. The sealing element 27 For this purpose, it extends essentially over the entire width of the lamellar armor 2 or the door opening.

In this case, there is a gap 246 between the projection 243 and a respective side wall 245 of the recess 244, which has a significant influence on the tightness of this type of labyrinth seal. The less wide this gap 246 is on both sides of the projection 243, the lower the tendency to let air flows, for example, due to a wind load. On the other hand, however, a certain minimum gap is appropriate to allow unhindered bending of the individual blades 24 against each other in the winding box to form the spiral winding. In practice, here a gap with a width of, for example, 7 mm on both sides of the projection 243 has proven to be particularly suitable in order to reliably avoid damaging of fins 24 during bending in high-speed operation. It should be noted that at Torblattgeschwindigkeiten of example, 3 m / sec. considerable dynamic forces come in the inlet of the laminated armor 2 in the winding in the winding box 4 to the effect. As a result, elastic deformation phenomena occur, in particular in the middle region of the lamellar armor 2 over the door width, which can be safely accommodated by a sufficient gap width in the overlap region of adjacent lamellae 24.

Nevertheless, in order to produce a particularly reliable closure in this boundary region between two adjacent lamellae 24 in the event of fire, fire protection elements 28a are furthermore arranged on both sides of the projection 243 on its flanks. These consist of a material that expands under the action of heat and fills existing spaces in a fire-retardant manner. A suitable material is, for example, "FIREFLY 102", which expands to 25 times its original thickness on fire. The fire protection elements 28a hereby have, as shown in FIG Fig. 5 a substantially rectangular cross section and extend substantially over the entire door width of the lifting gate 1, that is, it is designed strip-shaped.

In case of fire, even with a failure of the sealing element 27 a reliable conclusion of the free space between two fins 24 is possible, so that a flame can be reliably prevented.

Fig. 7 shows a plan view of a detail in the region of a side frame 3. From this illustration shows how the laminated armor 2 engages by means of the roller axes 25 and the guide rollers 26 in a guide track 31 and is held therein.

As shown in Fig. 7 Furthermore, fire protection elements 28b are additionally arranged on both sides of the lamellar armor 2 in the region in which this enters the side frames 3. The fire protection elements 28b are also formed of a material which expands under the action of heat and here closes the space between a side frame 3 and the lamellae 2 in case of fire. In this way, the transfer of hot gases in case of fire can be reliably prevented even in the area of the side frames 3. A suitable material for the fire protection elements 28b is in turn eg "FIREFLY 102". The other side frame 3 is analogous to that in Fig. 7 shown side frame designed and also has fire protection elements.

Fig. 8 shows the region of the inlet of the lamellae 2 in the winding box 4. As in particular from Fig. 9 can be seen in more detail, fire protection elements 28c are arranged here, which can be configured analogous to the fire protection elements 28a and 28b and serve in case of fire to a seal of the lintel area. Here, too, a reliable conclusion to hot gases, flames, etc. is possible.

In Fig. 10 the lower section of the laminated armor 2 is shown. As can be seen from this, a closing element 29 adjoins a lowermost lamella 24a. The lower side edge portion of the lowermost blade 24a is formed differently than the other blades 24 for this purpose. It includes receiving grooves for attachment portions of the end member 29. The end member 29 is in the present embodiment of a heavy formed flammable elastomer, in which case again chloroprene is used.

As further out Fig. 10 can be seen, the closing element 29 is formed as a hollow profile with additional outside sealing lips. Within the free space formed in the hollow profile fire protection elements 28d are further arranged, which in turn are formed of a material such as "FIREFLY 102" expands under heat and expands free spaces fire-retardant. Thus, in the event of fire, even in the case of a possible destruction of the closing element 29 due to the effect of heat, a reliable conclusion at the bottom of the lifting door 1 is possible. Thereby, a gap formation between the lowermost fin 24a and a bottom 5 can be prevented.

The lifting door 1 thus not only shows high-speed characteristics, but can also be used as a fire door. If a fire breaks out in a building, it is thus possible to reliably prevent the fire from spreading through lowering or closing of the lifting gate 1. Individual sections of the building can thus be sealed against each other.

In this case, this protective effect is maintained even if the individual slats 24 of the slatted shell 2 should bend due to a strong heat generation on one side of the lifting door 1. Such a deflection is caused by the then given different temperatures on both sides of the lamellar shell 2, since then a different elongation behavior comes to light. However, since the slats 24 engage one another in a form-fitting manner, there is no danger of an offset occurring between two adjacent slats. Thus, the cohesion within the lamellar armor 2 is permanently retained.

The invention allows, in addition to the illustrated embodiments, further design approaches.

For example, the sealing element 27 can also be arranged elsewhere in the abutting area of two lamellae 24. It can eg in the recess 244 positioned and accordingly provided on the upper fin 24. Furthermore, the sealing element 27 may also be present laterally of the projection. It can also be used several sealing elements of this type.

The material of the sealing member 27 may also be a conventional rubber, etc., which does not have any special fire protection properties.

The fire protection elements 28a-28d can each be arranged elsewhere in the respective area, as long as they achieve the desired fire protection effect in the event of an emergency. For example, the fire protection elements 28a may also be present on the side walls 254 of the recess 244. The number of fire protection elements 28d in the region of the closing element 29 can likewise deviate from the four shown. In addition, these can also be present on the outer side of the closing element 29. Furthermore, in certain applications, these fire protection elements 28a-28d can be partially or completely dispensed with.

In some embodiments, the hinge pins can also take over the function of the roller axes, so that the latter can be omitted. The hinge straps are then guided directly into the guideways 31.

The labyrinth in the butt region of two fins 24 may also be made in other ways than by the illustrated projection-recess arrangement. Other geometric designs are directly applicable as long as the direct passageway through the lamellae is interrupted in this area.

Claims (7)

1. A lifting door (1), in particular a fast-moving industrial door, comprising two guide tracks (31) respectively arranged on the two opposed sides of a door aperture, and a segmented armor (2) for covering the door aperture in the closed condition,
   wherein the segmented armor (2) includes hinge straps (21) having hinge links (22) which are interconnected in an articulated manner and may be placed at an angle relative to each other via hinge pins (23), the hinge straps (21) having a length corresponding to the vertical clearance of the door aperture, and the hinge straps (21) being supported and guided in the guide tracks (31),
   wherein the segmented armor (2) includes slats (24, 24a) which are placed on the hinge links (22), and
   wherein mutually facing lateral marginal portions (241, 242) of two adjacent slats (24, 24a) are configured in a complementary manner such as to engage each another in the closed condition of the lifting door (1) to thereby create a labyrinth seal,
   characterized in that
   at least two fire protection elements (28a) of a material which expands under thermal influence to close a gap between the lateral marginal portions (241, 242) of adjacent slats (24, 24a) are arranged on at least one lateral marginal portion (241, 242) of a slat (24, 24a) facing an adjacent slat (24, 24a), wherein the at least two fire protection elements (28a) being disposed on either side of a projection (243) at the flanks thereof and to face the major surfaces of the segmented armor (2).
2. The lifting door according to claim 1, characterized in that the lateral marginal portion (241) of a slat (24, 24a) is provided with a cross-sectional projection (243), whereas the lateral marginal portion (242) of the associated adjacent slat (24, 24a) has a recessed cross-section in the center area, so that the projection (243) engages the recess (244) in a form-fit when the lifting door (1) is in the closed condition.
3. The lifting door according to claim 1 or 2, characterized in that a sealing member (27) extending substantially over the width of the door aperture is arranged on at least one lateral marginal portion (241, 242) of a slat (24, 24a) facing an adjacent slat (24, 24a).
4. The lifting door according to claim 3, characterized in that the sealing member (27) is made of a flame-resistant elastomer such as, e.g., chloroprene or silicone.
5. The lifting door according to any one of claims 2 to 4, characterized in that a gap between the projection (243) and a side wall (245) of the recess (244) has a width of at least 3 mm, preferably at least 5 mm, and in particular at least 7 mm.
6. The lifting door according to any one of claims 1 to 5, characterized in that it further comprises a floor-side termination member (29) which is preferably made of a flame-resistant elastomer, wherein at least one fire protection element (28d) comprised of a material which expands under thermal influence and in a given case closes a gap between a lowermost slat and a floor is arranged on the termination member (29) .
7. The lifting door according to claim 6, characterized in that the termination member (29) has the form of a hollow profile, with the at least one fire protection element (28d) being provided in the cavity of the termination member (29).

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