WO2000060208A1

WO2000060208A1 - Factory gate

Info

Publication number: WO2000060208A1
Application number: PCT/EP2000/002604
Authority: WO
Inventors: Gabrijel Rejc
Original assignee: Efaflex Tor- Und Sicherheitssysteme Gmbh & Co. Kg
Priority date: 1999-04-06
Filing date: 2000-03-23
Publication date: 2000-10-12
Also published as: ATE241753T1; EP1165926A1; DE50002366D1; AU4745500A; JP5148786B2; DE19915376A1; JP2002541364A; EP1165926B1

Abstract

The invention relates to a high-speed factory gate (1), comprising a gate leaf in the form of a slatted shutter curtain. The slats (2) are guided in lateral guides (5) which have a spiral section (52) with a continuously bent spiral shape (52) in the shutter door and are made from a material with a flexural strength of less than 1500 N.m<2>. According to the invention, a material with this degree of flexibility is suitable for interacting with the special spiral shape of the spiral section (52) to enable the factory gate to open and close at particularly high speeds. The factory gate (1) also functions quietly and economically in terms of energy consumption and the flexible slats (2) reduce its susceptibility to damage. This ensures that the gate opening can be well sealed.

Description

description

INDUSTRIAL DOOR

The invention is based on a high-speed industrial door according to the preamble of claim 1.

Commonly known are conventional roller shutters, which are designed according to the roller shutter principle with a curtain made of slats and an upper winding shaft. These roller shutters are suitable as external closings for buildings e.g. during business interruptions, but are normally kept in the open position during operation, since openings and closings take a lot of time due to the very slow running.

High-speed roller shutters with winding of the door leaf above the door opening are also known in practice. These are, for example, soft PVC gates, in which a curtain made of soft PVC or a similar soft plastic is wound up on a winding shaft in the usual way and can be unwound to close the door opening. The windings of the door leaf or door curtain lie on top of each other in the winding, as in conventional roller doors, so that they scratch and contaminate accordingly, which is to be avoided. The curtain made of thick soft plastic is held with its side edges in wall-side guides and closed on its underside with a transverse aluminum sign with a rubber contact strip attached underneath. The side edges of the curtain are covered by buttons in the wind vertical guides are held, from which the curtain could otherwise slip out. Due to the stretching of the material, larger wind forces lead to bulging in the central area of the curtain, whereby the wind protection buttons can leave the vertical guides of the door opening. The reinsertion of the wind protection buttons is usually problematic, and damage to the curtain can occur.

The aluminum plate is also located in the area at risk of collision and is therefore quickly and permanently deformed in the event of a collision, so that replacement is necessary. To counter this problem, DE 43 13 063 C2 describes a roller shutter with a flexible curtain, in which a polycarbonate shield is arranged at the bottom of the curtain. This makes it easier to prevent the shield from jumping out or damaging it in the event of a collision; the curtain emerges from the side guides e.g. however, during the closing movement of the roller shutter and due to wind forces, it cannot be excluded. Such roller shutters are therefore only suitable to a limited extent as external ends for buildings.

Furthermore, from the German patent applications DE 40 15 214 A, DE 40 15 215 A and DE 40 15 216 A high-speed industrial gates of the type specified in the preamble of claim 1 are known, which have proven themselves in practice and have prevailed over conventional roller gates. While in conventional roller shutters the slats of the door leaf are attached to an upper winding shaft and are wound up directly on top of each other, the slats of the door leaf run of such a high-speed spiral door with side rollers in guide rails. At the upper end of the door opening, similar to a sectional door, but with a smaller diameter, they are deflected towards the inside of the door in a straight guide section, after a further deflection by 180 degrees downwards and then straight again, if necessary again after a deflection by 180 degrees led back again. This creates an elongated winding, in which, however, the slats of the door leaf do not rest on each other, but are guided in guides with the rollers at a distance from one another. In order to safely avoid touching the slats during operation, the guides in the spiral section are at a considerable distance from one another. Due to the elongated design of the spiral section, an excessive increase in the overall height in the lintel area is avoided, however, at the cost of increasing the structural depth into the building, since this results in only a slight overlap of the tracks, for example only three times overlap, in the spiral section, so that the large mutual distance between the guides in the overlap area has only a limited effect in terms of increasing the overall height.

In this way, the running speed of the door leaf can be increased considerably, up to approximately 1.5 m per second. Furthermore, scratches and soiling of the door leaf are avoided, which cannot be avoided when the slats lie on top of one another in the winding and make the door leaf unsightly in a short time.

The creation of such high-speed spiral doors has opened up new applications for the roller shutter principle: While conventional roller shutters with a winding shaft were used because of their very slow running on the one hand and the stability of the heavy, mostly metal door leaf on the other hand as a stable closure of the door opening for rest periods (e.g. overnight), and often behind it in the same door opening PVC swing doors for a temporary closure between passages of high-speed spiral gates are now frequently used as a replacement for the two types of gates mentioned above: they offer both a robust and reliable external closure of the gate opening in times of business interruption, as well as a quick opening and closing movement for the passage of vehicles during the operation, so that they take over the function of conventional roller doors as well as that of the provisional closure somewhat by PVC swing gates.

This increases the risk of damage to the door leaf of such high-speed spiral doors, since vehicles can hit the door leaf during operating times if it should not open properly for some reason. When using aluminum profile slats, such a start-up leads to permanent damage very quickly, so that the door must be repaired. In addition, metal slats of this type have a relatively high weight, which leads to high energy consumption for the opening and closing movements and in particular causes the connecting elements to be subjected to high acceleration forces.

It would therefore be desirable to use the slats of the

Door leaf made of a light, relatively soft-elastic, yet tensile and resistant material - 3rd

to manufacture. The tensile strength and resilience serve on the one hand to secure the opening of the door more securely in the event of a break in operation and on the other hand to absorb wind loads without damage. Such wind loads lying on the door leaf when the door leaf is closed lead to arching of the door leaf until a collar of the lateral rollers comes to rest on the associated wall-side guide profile and reliably prevents the door leaf from jumping out of the plane of the door opening despite the wind load lying thereon. The slats are arched in the transverse direction to the door opening and are loaded by the wind forces.

Such a flexible design of the slats is not possible with a generic high-speed spiral door, as this would lead to unmanageable difficulties in the area of the upper, contact-free winding: Even with relatively rigid slats, for example from double-walled aluminum profile bars, the usual door width results in: e.g. around 3 m, a considerable deflection between the upper horizontal guide rails due to the dead weight, so that in order to actually avoid contact, the upper horizontal guide rails of the spiral must be arranged at a considerable distance from one another.

However, this static analysis must be supplemented by a dynamic analysis: precisely due to the high running speed, for example during the opening movement, the lamellae are exposed to high centrifugal forces at the first deflection, so that each lamella bulges outwards. These centrifugal forces stop abruptly when moving into the following horizontal distance, so that the slats swing back supported by the weight and spring down, and then swing back up again. Thus, in an undefined vibration state, the lamellae run restlessly into the second deflection by 180 ° on the inside of the room, where they are again accelerated and bulged outward again by the centrifugal force, and are thus subjected to renewed, even stronger vibrations. In extreme cases, a lamella is located in an opposite direction of movement when entering a subsequent deflection, so that particularly high reaction forces act on the components.

In addition, considerable energy losses occur here, since the rollers on the transition to the horizontal guide sections first act on the outside of the guideway due to the centrifugal forces and then swing back against the inside of the guideway, causing a reversal of the direction of rotation of the rollers and thus a loss of friction occurs. This also has a disadvantageous effect on the service life and noise level of the arrangement.

With the running speeds that have been achievable up to now of a maximum of about 1.5 m / s, these instabilities are just about mastered in the case of relatively rigid aluminum profile lamellae, although a very considerable noise development also occurs here. Mutual contact of the lamellae in the horizontal tracks of the non-contact winding can also be ruled out due to the relatively large distance between the guides in the area of overlap of the tracks in the spiral section during flutter movements. A more flexible formation of the slats would, however inevitably lead to a reduction in the permissible maximum speed, since the centrifugal forces occurring in the deflections must be limited by reducing the speed in order to avoid a completely uncontrolled fluttering of the slats with mutual contact and damage and with high noise levels.

The invention is based on the object of designing a snow-running industrial door of the generic type in such a way that on the one hand the susceptibility to damage when inadvertently started up can be drastically reduced and on the other hand it can be operated at high speeds without unduly high noise levels.

This object is achieved in that a generic industrial door is provided, in which the spiral section of the guide has a continuously curved spiral shape and the slats are made of a flexible material with a bending stiffness of less than 1500 Nm ² .

It has surprisingly been found in the context of the invention that the continuously curved design of the guides in the spiral section while avoiding straight-line parts or even turning points leads to centrifugal forces acting in the same direction on the slats as they enter the winding area. These lead to a constant bulging of the slats outwards, especially at high running speeds, thus avoiding vibrations or even fluttering movements of the slats as a result of a change between acting centrifugal forces and acting weight forces. As far as slats in the area of the neighboring ones Bulge guide rails, this is harmless, since any slat located there also bulges as a result of the centrifugal force, and in any case more than the inner slat, because the centrifugal forces are correspondingly greater with a larger radius. The bulged lamellae of the door leaf thus interlock to a certain extent in a shell-like manner during the entry or exit movement from the winding area without there being any possibility of contact. Therefore, the larger, i.e. multiple, overlap of adjacent orbits in the spiral section, which in itself appears to be disadvantageous from the point of view of avoiding contact, does not pose a problem, since vibrations or fluttering of the slats are all the more reliably avoidable according to the invention, depending the higher the running speed, the more clearly the always outward speed-dependent centrifugal forces exceed the speed-independent weight forces acting in an alternating direction.

In addition, the degree of deflection or bulging of the lamellae under the influence of centrifugal forces is reduced in that the lamellae connected to one another at their edges are always at an angle to one another as a result of the continuous curvature of the guide rails and thus obtain significantly increased dimensional stability against bulging. This fact is essential for the success of the invention, above all from a static point of view: in the open position of the gate, all the slats in the winding area are angled to one another due to the constant curvature of the spiral section and thus support one another against deflection. In this way, the distance between the spiral turns of the guideways can be increased. Lich be reduced, so that the overall height of the winding area compared to the more lying arrangement of the generic prior art surprisingly not significantly, at least not in an impermissible manner. Conversely, however, the part of the winding area of the generic high-speed spiral doors, which may protrude far into the interior, is omitted, so that, contrary to expectations, a construction which is considerably more compact in depth and only slightly enlarged in height, if at all, results.

Experiments have confirmed that a high-speed spiral door according to the invention is considerably quieter than the generic construction and is more energy-efficient even with the same door leaf weights. Studies on this have shown that both phenomena are probably mainly due to a considerable reduction in flexing work in the winding area of a high-speed spiral door according to the invention: while in the case of an elongated winding area, first a flexing work on the connecting rubber strips when entering the first deflection, a corresponding flexing work at the outlet from the first deflection by 90 °, another flexing work occurs when entering the second deflection, and again when exiting from the second deflection, etc., which in total produces a bending movement of the rubber strips of more than 300 °, for example in the case of a circular spiral, only one occurs only flexing tip at the entry into the winding area and then no more noticeable flexing work, because the relative position of the slats at an angle to one another is maintained at least approximately unchanged in the entire winding area and is, for example, approximately 53 °. This leads to a reduction in the Energy consumption, which was around 30% in the case of a test gate.

A further reduction in energy consumption also results from the fact that the rollers, due to the centrifugal forces, come to rest continuously on one side of the guideways and therefore no reversal of the direction of rotation of the rollers is required as a result of changing contact on the inside and outside of the guides in the spiral section. As a result, the wear on the rollers can be significantly reduced, which significantly increases the service life of the arrangement.

This also leads to a reduction in noise, since vibrations or flutter movements are prevented by the constant action of high centrifugal forces. Overall, a surprisingly quiet run with low energy consumption takes place under all conditions. The energy consumption can be further reduced in that when using flexible plastic slats, the weight of the door leaf can be kept low, so that lower acceleration forces occur at the same running speed; this also reduces the stress on the connections between the lamellae, so that they can in turn be made lighter and have a long service life.

The use of continuously spiral-shaped guides in a spiral section for contact-free lamellae lying in the section is known per se. GB 1,172,560 A discloses a blind or a roller shutter made of interconnected slats, which can be used, for example, for closing escalator accesses, but also for building openings. The slats of this known roller shutter engage in lateral guides and have rollers in the interior of the guide rails. The known roller shutter can be operated by hand or mechanically driven, in the latter case a sprocket engages the rollers of the blinds and further promotes this gap between teeth. The shape of the guides in the spiral section can be adapted in any way to the respective installation conditions, so that depending on the installation, elongated spiral sections with straight sections or compact spiral sections with an almost continuously curved spiral shape result. The material of the slats can also be freely adapted to the respective application, since no dynamic forces act with regard to the low running speed even with a mechanical drive and since static forces also play a subordinate role in view of the usually small slat width.

Furthermore, from DE 37 09 884 AI an industrial door in the form of a spiral door with lamellar armor is known, which is present in the open position in a spiral section with a continuously curved spiral shape and contact-free arrangement of the slats. However, this is a sliding spiral door with winding areas standing on the wall and rigid slats. The problem of a bending of the slats under weight does not occur because the slat armor is guided hanging on one of its sides. For this reason there is a mutual distance between the guides in the Spiral section to avoid mutual contact when the slats bend is not required. As a result of the rigid design of the slats, there are no impermissible deformations even under dynamic loads.

An arrangement of the spiral section of this known industrial door in the lintel is far from it because this would negate the essential property of a sliding roller door to release the entire door height early. In addition, instead of the upright spiral sections on both sides, a common lying spiral section must be provided in the region of the lintel, which has a considerable length given the usually large widths of such a sliding roller door. In order to avoid mutual contact of the slats in such a case of installation, a considerable distance must therefore be provided between the guides in the spiral section, which would lead to an unacceptable overall height of the spiral section arranged in the fall area; this would noticeably reduce the available door opening height and thus nullify one of the basic advantages of a sliding roller door.

Known spiral sections with a continuously curved spiral shape could therefore not give any indication of the use of this geometry according to the invention in conjunction with a flexible design of the slats, in order to achieve the advantages described above when used with a generic industrial door. The inventively provided for the lamella consisting of pliable material bending stiffness of less than 1500 N ^"m ² is defined as the product of modulus of elasticity E and the geometrical moment of inertia I, where E is a specific value for the material used, and I is a characteristic value for the geometric design of the lamella. The desired bending stiffness can thus be provided by skillful setting of these parameters, which enables adaptation to different door widths, preconditions with regard to the material, for example with regard to impact resistance, etc. Practical tests have shown that bending stiffnesses below the above-mentioned limit are particularly suitable for the object of the invention, that is to say that they can achieve advantageous effects in conjunction with the continuously curved spiral shape, as explained above. Since the geometrical shape is also predetermined to a certain extent, this condition also means that the material used has a modulus of elasticity which allows the door leaf to be less susceptible to damage from external influences.

Overall, the invention thus creates for the first time a high-speed spiral door with a door leaf in the form of a slatted armor, which is suitable as a significantly improved door closure between vehicle passages due to yet again greatly increased running speed and low susceptibility to damage with extremely low-noise and low-energy operation, but nevertheless in times of Business interruption can serve as a full, hermetic and breakthrough-proof closure of the gate opening. Advantageous further developments result from the features of the subclaims.

By providing lamellae made of a material with a bending stiffness of less than 1000 Nm ² , preferably less than 500 Nm ² and in particular less than 200 Nm ² , materials with an even lower modulus of elasticity of e.g. B. use less than 40,000 N / mm ² and in particular less than 10,000 N / mm ² , whereby the risk of permanent deformation or even breakage of the slats, for example in the event of unintentional start-up etc., can be further reduced. At the same time, slats of this type are further characterized in that, together with the continuously curved spiral shape, they show improved dynamic properties. In addition, depending on the width of the door, the behavior of the door leaf can be specifically adjusted with the specified bending stiffness.

Furthermore, the choice of material according to the invention for the lamellae with a density of <2 g / cm ³ enables a significant reduction in the moving masses, as a result of which the centrifugal forces can be significantly reduced. In addition, the slats then have a relatively low dead weight, which means that the deflection of the slats in the upper winding is less even in the idle state. Therefore, the guide rails can be arranged closer to each other. This enables a further reduction in the space required in the lintel.

Experiments with soft-elastic plastic lamellas made of PC, PMMA, PVC or a combination of both materials with a preferably single-walled profile have shown that in addition to a drastic reduction in susceptibility to damage Aluminum profile slats can achieve a weight saving of 40% and more. Even at running speeds of up to 3 m / s, i.e. 100% above the maximum running speed of the known design of high-speed spiral gates, there were no problems with fluttering movements or noise in the winding area.

Furthermore, a well-flexible, flexible design of the slats, for example made of such materials, further reduces their tendency to permanent damage when lightly started, since the slats affected by an impact can yield more easily. In this way a not insignificant penetration depth e.g. of a vehicle part in the door leaf level without leaving permanent deformations.

It is a further advantage if at least some of the slats are transparent. This makes it possible to see the space behind the door opening even when the door is closed, which means e.g. any oncoming traffic can be perceived. Since, according to the invention, the lamellae are present in the winding in a contact-free manner, scratching of the lamellae surfaces can essentially be ruled out, as a result of which transparency is permanently maintained.

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

Figure 1 is a simplified side view of the industrial door according to the invention. Fig. 2 is a partially sectioned front view of the industrial door according to the invention;

Fig. 3 is a plan view of the industrial door shown in Fig. 2;

Fig. 4 is a detailed view of the angled slats

5 shows the cross section of a single-walled lamella.

6 shows the cross section of a double-walled lamella.

7 shows a stress-strain diagram for comparing the characteristic values of different materials;

8 shows a bending stiffness-deflection diagram for comparing different materials and single-walled and double-walled lamellae; and

Fig. 9 is a representation for the theoretical explanation of the bending stiffness.

According to the illustration in FIGS. 1 to 3, an industrial door 1 has a door leaf covering the door opening, which is formed from a multiplicity of slats 2 which can be angled together. The slats 2 are in this case arranged horizontally across the door opening and are articulated to one another at their lateral edges by means of hinge straps 3. The hinge members of each hinge band 3 can be angled relative to one another via hinge pins which are not shown in more detail here. Furthermore, rollers 4 provided with retaining collars are arranged coaxially with the hinge pins and engage in guides 5 one, which both sides of the gate opening are arranged in frames 6. A simple exchange of individual slats is possible, since these are attached to the hinge straps 3 and themselves do not absorb any forces, since the lifting movement is initiated directly via the hinge straps.

This basic structure of the door leaf and the

Leadership is particularly from the German patent applications DE 40 15 214 A mentioned at the beginning,

DE 40 15 215 A and DE 40 15 216 A are known, so that further detailed explanations are dispensed with here.

Each of the guides 5 has a vertical section 51 in the area of the frame 6 of the door opening and a spiral section 52 in the lintel area of the door opening, as can best be seen from FIG. 1. The door leaf formed from the large number of lamellae 2 is moved into the spiral section 52 of the guide 5 when the door 1 is open, as shown in FIG. 1. The

Gate 1 is driven by a motor, not shown here. As can also be seen in FIG. 1, the slats 2 of the door leaf are present in the spiral section 52 without contact with one another. Furthermore, the slats 2 do not engage in the guides 5, at least in the spiral section 52.

The spiral section 52 here has approximately a continuously curved spiral shape, which is formed without straight-line sections or turning points. In order to be able to implement the ideal of a circular spiral in terms of production technology, in this embodiment quarter or semicircular guide segments are lined up, the radii of which are dimensioned such that a spiral results, in which an approximately continuously curved curve is obtained Form is achieved. Depending on the choice of material and production options, however, continuous, one-piece production of the guide rails can also take place. The gate leaf is therefore moved into the spiral-shaped winding area under centrifugal forces which act in the same direction and are preferably essentially constant in magnitude and are in any case not subject to abrupt fluctuations. A possible bulging of the individual lamellae 2 under the influence of the centrifugal forces in the area between the guides 5 is also harmless, since the centrifugal force acts on the outer lamella due to the larger radius than the inner lamella 2. Mutual contact of the slats 2 can therefore be avoided both in the stationary and in the moving state.

4 can be seen in more detail, the mutually angled slats 2 in the spiral section 52 also stabilize each other via the rubber strips arranged in between as a connecting element, so that the bulging of each individual slat 2 e.g. is limited under the influence of centrifugal forces. Even in the case of static loads, this alignment of the slats in the spiral area 52 reduces the amount of deflection under the dead weight.

In Fig. 5, a single-walled lamella 2 is shown in cross section. It consists of a material with a low modulus of elasticity, preferably PMMA or PVC or a combination of both. End sections 21 of the lamella 2 on both sides also serve to accommodate the rubber strips, not shown here, by means of which the individual lamellae 2 are connected to one another in a sealing but angled manner are. Each slat 2 also has through holes, not shown here, by means of which it is mounted on the hinge 3. This single-walled lamella 2 has an area moment of inertia I _y of 22000 mm ¹ .

A double-walled lamella 2 is shown in FIG. 6. In terms of its functional dimensions, this is designed in accordance with the single-walled lamella 2 and can be exchanged for this. It has an area moment of inertia l _y of 35800 mm ⁴ .

7 shows a stress-strain diagram which illustrates the elastic behavior of different materials. In comparison to steel, in particular, it can be seen that aluminum and, above all, PMMA and PVC can accept significantly larger deformations before there is plastic deformation or the yield point is reached.

The following table and in Fig. 8 explain the material parameters of different materials and the deflection behavior of different lamella designs:

a bending force F = 50 N was used as a basis.

Figure 8 shows a bending stiffness-deflection diagram in which some of the above table values are graphically represented. The characteristic curve a) stands for a single-walled lamella with a length of 3000 mm, while the characteristic curve b) one describes double-walled lamella of this length. The

Characteristic curve c) stands for a single-walled lamella with a length of 6000 mm, while characteristic curve d) describes a double-walled lamella of this length.

The deflection behavior is related to the bending stiffness in the following manner and illustrated in FIG. 9:

F * l ^}

/; "=

48 * E * /

The quantities used in this equation have the following meaning:

f. maximum deflection in mm

F bending force in N

1 length of the rod in mm

E modulus of elasticity in N / m ² l _v equatorial moment of inertia of the cross section in mm ".

This results in the following relationship for the bending stiffness:

For *

E * I =

48 * / ",

The bending stiffness is therefore a measure of both the material used and the geometry of the lamella, whereby the following applies:

E * I, ~ r , 70.

Assuming a constant assumed bending force F and a predetermined maximum deflection f, the bending stiffness changes in the third power to a change in the length of the rod or the lamella. Practical tests have shown that a bending stiffness of approx. 1500 Nτn ^{2 is} suitable for all common door widths of up to 8 m and is particularly advantageous in combination with the continuously curved spiral shape.

The preferred bending stiffness for the respective door width can therefore be derived from this connection and can also be significantly lower with small door widths. Other factors for the measurement of the bending stiffness result from the design of the lamella shape, which is predetermined to a certain extent, and the desired insensitivity to external influences, e.g. an unintentional start-up, i.e. the elastic modulus of the material.

The bending stiffness of less than 1500 Nm ^{2 provided} according to the invention can therefore be achieved with different materials and geometries, depending on the door width. Here, the lamella can also be made of aluminum with a corresponding geometric design, but this material is disadvantageous with regard to the lower elastic deformability in comparison to the plastics.

It should also be taken into account that the individual slats are connected to each other by means of rubber strips and that the door leaf is therefore more stable overall than the deflection values for the individual slats according to the table above indicate. The maximum deflection of the door leaf, of which one in the Practice is usually 400 mm and in certain applications also 200 mm essentially independent of the door width.

It is also important that the modulus of elasticity is a function of the tension for elastic expansion and accordingly only has meaningfulness in the elastic range. Since the tension at the elastic limit is reached with metals at considerably lower strains, billets etc. quickly lead to permanent deformations on the slats or on the door leaf. The area of elastic expansion of the respective material must therefore be taken into account when designing the slats.

If the slats are made of plastic, it is also possible to achieve a substantial reduction in weight. The consequence of this is that the deflection in the static case can also be reduced due to the line load. This case is calculated as follows:

5 * E *

In addition, this weight reduction also reduces the size of the centrifugal forces in the dynamic case, that is to say when the door is opened and closed.

In addition to the embodiment shown here, the invention permits further design approaches.

Thus, each slat 2 can also be made transparent, with a single-walled design of the slat 2 is also advantageous in terms of improved transparency. Furthermore, only individual slats 2 of the door leaf can be made transparent.

In the embodiment shown, the slats are not guided directly in the guides 5, but only by means of the rollers 4. In particular in the area of the vertical section 51, however, it is also possible to arrange the slats in such a way that guides are gripped around them.

The invention thus creates a snow-running industrial door 1, in which the guides 5 have a spiral section 52 with a continuously curved spiral shape. The door leaf of the industrial door 1 has slats 2 which are made of a material with a bending stiffness of less than 1500 Nm ² . According to the invention, it has surprisingly been found that such a relatively flexible material is suitable in cooperation with the special spiral shape of the spiral section 52 in order to permit particularly high speeds when opening and closing the industrial door. Due to the flexible design of the slats 2, forces can also be absorbed transversely to the gate opening plane, so that permanent deformations of the door leaf are avoided to a certain extent when starting.

Claims

Expectations

1. High-speed industrial door (1) with a door leaf covering the door opening, which has a plurality of angled slats (2; 2) which are guided by rollers (4) in guides (5), the guides (5) in The frame area (6) of the door opening has a vertical section (51) and a spiral section (52) in the lintel area of the door opening, and the spiral section (52) serves to receive the rollers (4) of the door leaf in the open position in such a way that in the spiral section (52 ) adjacent areas of the door leaf on the associated rollers (4) are held in contact-free distance from one another,

characterized,

that the spiral section (52) has a continuously curved spiral shape, and

that the lamellae (2, 2) made of a pliable material with a smaller flexural rigidity 1500 N ^"m are formed. ²

2. Industrial door according to claim 1, characterized in that the slats (2; 2) are made of a material with a bending stiffness less than 1000 Nm ² .

3. Industrial door according to claim 1 or 2, characterized in that the slats (2; 2) from one Material with a bending stiffness less than 500 Nm ² and preferably less than 200 Nτn ^{2 are} formed.

Industrial door according to one of claims 1 to 3, characterized in that the slats (2; 2) are formed from a material with an elastic modulus of less than 40,000 N / mm ² and in particular of less than 10,000 N / mm ² .

Industrial door according to one of claims 1 to 4, characterized in that the slats (2; 2) are made of a material with a density of equal to or less than 2 g / cm ³ .

Industrial door according to one of claims 1 to 5, characterized in that the slats (2; 2) are made of plastic.

7. Industrial door according to claim 6, characterized in that the slats (2; 2) are made of PMMA, PVC or a combination of both.

8. Industrial door according to one of claims 1 to 7, characterized in that at least some of the

Slats (2; 2) are single-walled.

9. Industrial door according to one of claims 1 to 8, characterized in that at least some of the slats (2; 2) are transparent.