DE4015215A1 - Lifting gate with plate armouring in guide tracks - Google Patents

Abstract

The armouring (12) comprises a number of plates (14) which are rigid, cover the width of the gate aperture, and can be angled in relation to one another. Two guide tracks (2) are arranged, one on either side of the gate aperture. The guide tracks issue in the entry (8) of the lifting gate in an inwardly running spiral section (10) in which the armouring (12) can be moved in the open position of the gate, so that the plates (14) are positioned in a spiral-form path and contact-free in relation to one another. The spiral section (10) of the guide tracks has a horizontally running, separately insertable extension section (62).

Description

The invention relates to a lift gate with a slat armor, in guideways from a closed position to a Open position of a gate opening can be moved vertically upwards is.

As an example of a lifting gate, a rolling gate is considered vertical opening of a door opening that can be walked on or driven over known that conventionally consists essentially of one Roll armor, consisting of mutually angled slats len using the two side edges of the door opening vertical guide rails in the closed position , a winding shaft to which the roll armor is attached and by means of which the roll armored vehicle is in the open position is started up and wound up, an electromotive Drive, as well as a safety gear that Versa prevents the roll armor from falling.

The roller shutter as the one that closes the gate opening protective part of a roll closure consists of articulated interconnected slats, usually profile parts, for example extruded aluminum materials. The The height of the individual slats is usually about 80 to 120 mm. These profile parts are mostly as one sliding profiles provided due to their shape articulated to each other without further links Tanks are connected. With a typical aluminum Extruded profile is the joint, for example, as a pan and web formed so that when nested Pro filen the joint thus formed when winding the roll  armor can absorb and withstand forces. The connection of the lamellae shaped into a joint points usually a big game on. In addition, the shape giving out the nested profiles like this forms that a deposit of dirt and water in the joints is prevented, and sufficient tightness against Wind attack is guaranteed.

The bale layers on the winding shaft are included other related profiles formed that a certain pro have height. Each profile lays on the most protruding edge of a profile of the one below Location. The direction that a profile in the bale cross-section within its bale position depends on the Point of contact of the profile. By being accidentally ingested Location again determines the order of the next one, with profile associated with him. This results in up wrapped bale an irregular position of the individual Roller shutter profiles. It follows, among other things, that for example only a single edge of a single roller door profils the entire load of the still hanging armored body les supports, whereby considerable edge pressures occur can.

To secure against lateral displacement are on the side the roller shutter profiles usually head pieces or end pieces attached in corresponding vertical guide rails run with a generally U-shaped cross section. This verti kalen guides are funnel-shaped at their upper inlet extended so that the roll armor flawlessly when rolling in the vertical guide can run in without the risk of Hooking exists.

The rolling tank is so on with its initial profile Fixed winding shaft that the attachment when closed Gate on the side of the shaft facing away from the tank  is located, d. H. that the tank or that extend the tank the end plates around the shaft by at least 180 °. This ensures that the tank largely by Rei exercise forces, and therefore not the full tank own load acts on the suspensions. It's closed Gate when the closing profile seals on the lower edge the opening, d. H. generally on the floor. in the the rest of the armored personnel carrier should not collapse. The entire tank - except for the final profile - remains as Hang the load on the shaft or shaft axis. Hereby under the roller shutter differs fundamentally from the Rolla the one that usually serves as an additional closure for an opening is seen.

In the open position of the roller door, it lies on the winding shaft rolled-up roll armor in the lintel area of the gate opening. Most of time the drive is protected behind the fall, and can therefore Do not be damaged by vehicles when entering the gate be damaged. An electric motor is usually used as the drive provided, furthermore a manually operated drive for makeshift operation.

With an electric drive, the roller shutter shaft becomes constant ter speed, d. H. with a constant angle speed, driven. This will make it on the shaft fixed roll armor raised and mounted on the shaft wraps. The decisive factor for the lifting speed is initially the effective winding radius in each case, which is during winding is enlarged because the lower parts of the Rollpan place on the already wound upper parts. There the lifting speed is directly proportional to the bal lenradius changes, a roller shutter opens slowly at first up to get faster and faster. At a closer look at the kinematic relationships below The roller shutter must take into account the thickness and height of the profiles len can be viewed as a polygon. Lie down when winding up  the profiles first on the round winding shaft. The straight ones Profiles form a polygon on it. Here are the corners of the polygon farther from the center of the wave than the middle of a polygon side. If the wave of the Roller shutters rotate at a constant angular velocity, so the armored car becomes one with the length of the corner point of the polygon corresponding to the lever arm and the latter Lever arm length raised corresponding lifting speed, and the next moment with one length to one Side of the polygon corresponding lever arm and the ent speaking lifting speed. The stroke speed is the effective, discontinuous and randomly occurring Lever arm directly proportional, and is therefore when winding of the roll armor characterized by correspondingly strong and sudden fluctuations. Associated with this occur in the Mass accelerations and decelerations fluctuating strongly of the unrolled armored vehicle mass. These masses accelerations also go into the transmission of the drive unit seem that for a corresponding degree of non-uniformity must be designed, otherwise failures can occur. In principle, these accelerations are all the less, the thicker the roll gate ball, d. H. the more that Polygon approximates a circle. Because the biggest mass procurement However, reductions and delays occur when the Armored personnel carrier is still far below, these forces multiply thus still mutually due to the not inconsiderable Dead weight of the roll armored car.

The accelerations and decelerations of the masses of the abge wound roll armor act as vibrations. These vibrations also act on the winding shaft Structure, so that in the structural analysis of the structure It is important to ensure that the natural vibration number is outside the door frequency remains. Otherwise the Hubge speed of the roller shutter can be drastically reduced. At constant angular velocity of the roller shutter shaft  as the rolling gate bale gets thicker the frequency of the Schwin increases and their amplitude decrease. this means conversely, that the sound generation when the Rolling gates get bigger the further the roll armor goes down is coming.

In addition to the mentioned irregularities in the lever arm ratio nisse when winding the profiles in the form of polygons there is another one with the previously known roller shutters Reason that is also extremely problematic kinemati conditions. Since the driven shaft is one Roller doors cannot exert pressure on the roller shutter, must be ensured that the Falling weight of the freely hanging roll armor part with under rail is greater than the friction of rest. The only way the tank as a result of its own gravity active in motion when the shaft is downward is driven. The least friction for the tank is then given when it is pulled vertically into the Guided tours arrive. This type of attachment is called "nor male display ". To the extent that the roll armor runs, ver the bale diameter decreases. The tank then runs increasingly obliquely in the inlets of the guides. If the roller shutter has completely expired, but - as with roller doors usual - still hangs on the shaft on the train, the whole hangs The armored vehicle's load may only be on one Profile of the profiles still on the shaft. At Viewing a vertical cross section through a roller shutter you can see that the tractive force of the total tank load not in the gate level, but in the straight connection from the lower part to the effective bale radius. The The armored personnel carrier will be in the middle between the guides deform in order to follow the course of the tensile stress to approach. However, the profile ends are from the guides held and cannot follow the tension line. Wuh rend is the tension span resulting from the curtain's own load  the upper part of the tank from the gate level towards pulls towards the shaft, the guides bend the profile ends back to the gate level. As a result, the individual profiles but not only stressed on bending, but also on Torsion. The greatest bending and torsional moments occur at the inlet.

This goes hand in hand with the way in which the "normal display" is attached reducing sealing problems has been proposed hit the deflection by attaching a pressure shaft limit. However, this takes one unru higher and noisier running of the roller shutter in purchase (cf. Horst Günter Steuff, "Das Rolltor", Düsseldorf, Werner Verlag GmbH, 1987, p. 93) The unfavorable kinematics described above in its Basics known for more than a hundred years (and up to barely changed) is the main reason for one high noise during the run, and ultimately for to consider the inadequate speed of the roller shutter hen. The ones that come essentially from the profile joints Running noise mainly occurs when the uphill Rolling gates open and then particularly strong in the lower third tel of the gate opening, provided the roller door is a "normal off location ". The noises arise near the bushing where the profiles bend with high tensile forces are loaded and should rotate in the joints.

Although the previously known roller door due to its powerful and positive connections of the slats in the back view of tightness against wind pressure and security against Unauthorized opening for a long time as the cheapest solution was viewed are the poor high-speed properties of the conventional roller shutter used in industry early recognized as disadvantageous. The Laufge  speeds are approximately the same with conventional roller shutters 0.25 to 0.35 m / s.

There are also high-speed roller shutters in the industrial sector with a full-surface door leaf made of flexible material that can be wound on a winding shaft or winding drum, Proven as an additional opening closure. Such roll gates also offer a suitable choice of flexible mate rials the advantage of optical transparency. Widespread are for example Macrolon foils or soft PVC foils. This advantage over opaque material goes however lost over time because of optical transparency by intrusion of dust and the like when winding the film and the associated scratching of the surface che is affected.

In view of the limited space available above the Sturzbe rich, and the large core that is usual with foil roller doors The diameter of the shaft must be the film in this type of Rolltor be as thin as possible, because the winding diameter in total otherwise becomes too big. In addition, by providing thinner foils due to the easier winding at the same time allows the door leaf to run faster. The small thickness of the foils, and accordingly that low weight of the door leaf leads to a reduced wind resistance. As a remedy, this was proposed hit, additional weight in the form of a at the bottom the door leaf arranged end profile, or spring loaded constant tension belts, the pulleys mounted on the floor run to provide.

The biggest disadvantage with the foil roller doors arises consequently from the behavior of the door leaf in wind pressure, that approaches the behavior of a sail more than that Behavior of a disk. Since the door leaf only on the wrap shaft is supported, the door leaf becomes significant with wind load  inflated and bulged, and consequently also raised. The like roller shutters are therefore also with regard to defective Security against unauthorized opening only as an additional Completion of a gate opening.

So-called sectional doors are also known can be used for large door openings. A conventional one Sectional gate consists essentially of a tank with comparatively high sections that can be Actuator from a vertical closed position to an upper one horizontal position below the ceiling can.

By comparative used with sectional gates large height of the individual sections is reduced due to the number of connecting elements of the sections such as Hinges or the like and also reducing the Total number of end faces to be sealed mechanically achieved with a more compact design, with correspondingly good Resistance to wind attack and security against unauthorized use opening. Furthermore, it allows the great height of the one individual sections, transparent sections in the form of glass or plastic windows.

The compact design of sectional doors makes it possible ner, lightweight gates made of aluminum sections that are used for Heat and sound insulation, for example with an art material are filled to provide, for example Garage doors with larger door widths without additional ones Only open the electric motor drive manually to be able to close.

As a rule, the individual sections are in the lock position aligned with each other, so that the entire Face of a section available for the seal stands. The sectional door thus appears to be cleanly closed  senes gate with a continuous outer surface, without intermediate column. A further improved tightness is caused for example by rubber inserts in the Closed position through the superimposed sections be squeezed together. Alternatively, the sections point one at one end over the entire width of the door bulging bulge, which in a corresponding recess an adjacent section when swiveling the sections engages in the same plane as a tongue and groove connection, with which the mechanical strength of the door leaf against wind pressure is further improved even with large door widths.

On the inside of the gate, the sections are by means of a A plurality of individual hinges connected via the entire width of the gate at certain intervals in a sol Chen number are appropriate that a sufficiently large Festig speed and support is reached. The one on the side of the Hinges attached to sections are usually the same early trained as a holder for a role that in a guide rail with a U-shaped cross-section at the edge of the sectional gate. Because the individual Hinges are attached to the sections so that the sec can be folded away to the inside problems here insofar as those on the inside of the Tores attached and projecting parts of the hinges disrupt optically and are dangerous to injury. Another There is a risk of injury with sectional doors when bending the sections through the open column that occurs or when folding back the sections and closing the Column.

Another disadvantage with sectional doors with relatively high Sections arise in connection with the arched Guide part above the lintel area, where the individual Sections from vertical to horizontal be folded down. This folding naturally leads to  sudden tipping accelerations and accordingly rapid actuation to considerable force the individual sections. As a result of the different radial distances between the guide rollers and the actual position the mass of the section in the area of the upper curve path tre th acceleration and deceleration forces, the generally uneven force curve due to the flat off Formation of lamellae with finite height in the curves orbit in the manner of a polygon, leads to the fact that Sectional gates usually only with lower running speeds can be operated without the risk of there is more noise.

Over the multitude of individual hinges, the over transverse forces also passed through the body of the sections recorded, and thus burden them. The one when folding down of the sections in the peripheral hinges and accordingly in the Guide rail forces are essentially the speed of opening and closing of the second tional gates dependent. Because of the principle not for high The design is designed for speeds Use of sectional doors as industrial doors with quick opening ability set limits.

As a drive system for sectional doors is usually one Cable pull device with pull ropes and suspension ropes, as well as on a cable drum arranged in a drive shaft. At As the gate moves upwards, the suspension cables are attached to the Rope drums wound up while the Unwind the pulling ropes from the rope drum. When descending of the gate, the pull cables are wound up and pull the gate down while holding the ropes without to become limp, be unwound from the rope drums. As a result, the suspension cables are constantly under tension and tension cannot run off the rope drums. The drive of the  Drive shaft is via an electric motor, which at for example, is arranged directly below the ceiling.

To balance the door leaf weight are known Torsion springs are provided which are coaxial to the continuous Drive shaft are arranged. In the closed position of the Tores, the torsion springs are fully tensioned and are at the Lifting the door leaf relaxed accordingly. This gate Sion springs are subject to increased wear and tear therefore significantly limited in life. In particular with a frequent and sudden reversal of the direction of the movement the torsion springs suffer Considerable dynamic due to the jerky movements Voltage peaks. Due to the failure of the torsion spring the associated maintenance on the sectional doors and exchange work is naturally time-consuming and cumbersome Lich.

Due to the arrangement of the drive shaft with the torsion above the arch and the electric motor nearby the drive shaft must be used with conventional sectional doors Considerable space requirement above the lintel be made without special constructive measures such as for example providing a double horizontal guide below the ceiling, or laying the drive shaft together Torsion springs to the extreme end of the runners, one Typically not less than 400 mm. In addition the excessively large space requirement occurs with sectional doors the depth, which is essentially the clear height of the gate opening voltage corresponds. Because the usually available Free space in depth, d. H. the measure between the rear edge Fall and the next obstacle in the depth of the room, as with for example beam, wall, ventilation pipe, fan or the like, will be tight, the installation of the known sectional doors not feasible in many cases be.  

The invention has for its object to a lifting gate To provide which fast run at low Noise when opening and closing the gate enables, and sufficient in the closed state great tightness against wind and weather attack, as well as safe protection against unauthorized opening, and moreover for larger door heights, only a small space is required half of the fall needed.

This task is performed by a lifting gate with the characteristics of Claim 1 solved.

In the lifting gate according to the present invention, the two guideways that are opposite each other on the two the sides of the gate opening are arranged in such a way det that, starting from a vertical approximately over the Height of the gate opening vertical section, which at the guideways at the entrance of the lifting gate in a spiral open in a spiral section. Here is achieved by that even at a greater height The required space for the slat armor as low as possible in the open position in the depth of the gate is held in without a significantly increased space requirement the height above the lintel. According to the invention the slat armor is in the open position of the lifting gate can be moved into the spiral section of the guideways in this way, that the plurality of lamellae in a spiral path and against each other are completely contact-free so that no friction or pressure forces on the slats come and thus considerable running speeds of the stroke gates are made possible without excessive noise winding goes hand in hand with it. The width of the gate opening overlapping slats of the slat armor are against each other the bendable and made of rigid material provides so that the lifting gate in the closed position is sufficient  has great mechanical stability to even larger ones Withstand wind loads as well as security against to ensure easy opening.

To adapt to different gate heights are according to Claim 2 extension sections provided that simple in the spiral section of the guideways essentially be used horizontally.

In a further embodiment of the invention is according to claim 3 provided that the guideways in the form of a pair of Round rods are provided, whereby the bow in particular shaped sections of the guideway easily manufactured are.

As an improvement in the drive of the Hubto according to the invention res a weight compensation is provided according to claim 4, which is a balance spring and one on the balance spring attached tape, which on a with the drive of the lifting gate interacting shaft can be wound, wherein this shaft has a predetermined core diameter. The main advantages of this weight balance are available all in an extended weight life the same without additional translation means to achieve required characteristics.

A with regard to the possible running speeds of the Hubtors advantageous drive according to the invention has according to Claim 5 an endlessly drivable via an electric motor chain on one side of the lamella armor is increasing. The endless chain is guided so that the Attack raising and lowering the slat armor the tensile forces completely in the plane of the door leaf to run.  

According to claim 6 is a top of the gate opening approximately horizontally arranged over the entire width of the door Sealing lip provided, due to which it is prevented that Rain water, dirt or the like in the upper area of the lifting gate penetrates.

For further details, the two are parallel German patent applications by the same applicant from today Days titled "Lifting gate with a slat armor bendable slats "(lawyer 11EF01412) or "Closing element for an opening" (attorney's sign 11EF01432) referenced and referenced in full.

Further details and advantages of the invention result from the following description of an off leadership form based on the figures. It shows:

Fig. 1 is a partial side view of an embodiment example of the lifting gate according to the invention;

Figure 2 is a partial rear view of a slat armor corresponding to the lifting gate according to the invention.

Fig. 3 is a schematic sectional view taken along the line III-III in Fig. 2;

Fig. 3A is an enlarged view of detail X of Fig. 3;

Fig. 4 is a plan view of a slatted armor according to the present invention;

Fig. 5 is a sectional side view of an exemplary embodiment of the lifting gate according to the invention;

Fig. 6 is a schematic side view showing the weight balance of a game Ausführungsbei the lifting gate according to the invention; and

Fig. 7 shows the characteristic of the weight compensation shown in Fig. 6 according to the invention.

As Fig. 1 and Fig. 4 illustrate, the Darge presented embodiment of a lifting gate guide tracks 2 and 2 ', which is arranged on the two opposite sides 3 and 3 ' of a gate opening 1 is. In the following, designated reference numerals Chen each the corresponding parts of the lifting gate, which are arranged on the side 3 ', so that this does not need to be explicitly mentioned below. Each Füh approximately 2 , 2 'has a vertically extending over the height of the gate opening vertical section 4 , which extends to about the height of the lintel 6 , and opens at the inlet 8 of the lifting gate in a spiral inward spiral section 10 in an upper Edge area of the gate opening. A slat armor 12 for covering the door opening with the clear door height h in the closed position can be moved upwards into the spiral section 10 of each guideway in the open position of the lifting gate, in such a way that the slat armor is arranged in a spiral manner without lamella 14 lying next to one another. As a drive for the lamella armor 12 , an endless chain 16 and an electric motor 18 is provided.

In Figs. 2, 3 and 4 details are shown of the erfindungsge MAESSEN slatted armor. On the two edge sides of the slat armor 12 , a hinge band 20 , 20 'is provided, which has a length which corresponds essentially to the height of the door opening 1 . Each hinge band 20 , 20 'consists of rigid hinge members 22 which are articulated miteinan and can be angled against one another via hinge pins 24 , 24 '. For this purpose, each hinge member is formed in a known manner at the end of it into a rolled-up eyelet, into which the hinge pin 24 can be inserted. In each case two adjacent hinge members are connected to one another in an articulated manner in such a way that their eyes are arranged coaxially to one another, in which a common hinge pin 24 is mounted.

In the example shown are also coaxial to the coulter nierzapfen 24 , 24 'rollers 26 , 26 ', which roll the leadership of the hinge straps 20 and 20 'in the guide tracks 2 and 2 ' are used. In the example shown, each guideway has a pair of round bars 28 and 30 which are arranged at a constant distance from one another which is selected to match the diameter of the rollers 26 . The hinge straps 20 , 20 'and the round rods 28 , 30 are made for example from hard, metallic material, while the rollers 26 can also be made of plastic material. To secure the slat armor against falling out of the guideway, each roller 26 , 26 'has a retaining collar 27 , 27 ', the outer diameter of which is greater than the clear distance between the round bars 28 , 30 .

The slats 14 are, for example by means of screw connections 32 , 32 'so on the hinge straps 20 , 20 ' up and attached that a space 34 is formed by the distance between the adjacent slats 14 , in which the hinge pins 24 , 24 ', or the coulters of the hinge members 22 , 22 'engaging the coulter, as best shown in FIG. 3. Invention according to the invention is achieved in that the geometric hinge axis 36 comes to lie completely within the area which is limited by the two outer main surfaces 38 and 40 of the lamellar armor 12 . This position of the hinge axis 36 ensures that the width of the Winkelöff opening between the adjacent slats 14 when bending the slat armor is reduced to a minimum, so that the tilting accelerations when entering the upper, curved guide track are reduced. Here, the possible running speeds of the lifting gate shown are further increased without being accompanied by excessive noise.

The slats with a height of up to 150 mm, for example, are completely independent of each other and individually placed on the flock of nierbänder 20 , 20 ', so that, for example, the lack of an entire slat has no effect on the mechanical stability and functionality of the lifting gate according to the invention . The hinge straps 20 and 20 'thus form, as it were, the load-bearing framework or skeleton of the lamellar armor, which absorbs all the forces that arise during the movement of the lifting gate. Because of the mechanical cally continuous cohesion of the hinge 20, 20 ', the tensile forces from the Schanierbän be countries 20, 20' recorded and not transmitted to the fins 14th By transferring and distributing the forces to an articulated, continuous, yet tensile band, a smooth and smooth movement is achieved even with extremely fast runs of the lifting gate.

Since the individual slats 14 are initially placed at a certain distance from each other on the hinge straps 20 , 20 ', so as to create space for the hinge pin, the adjacent slats 14 are also in the closed position of the gate without touching each other, so that the known at the conventional Chen sectional door Rattling noises when closing the gate in the lifting gate according to the invention also fall completely ent.

To reinforce the mechanical stability of the Lamellenpan zers and to increase the tightness, but without endangering the properties of the lifting gate with regard to low noise, sealing strips 42 in the form of rubber strips are provided, which cover almost the entire width of the door between the hinge straps 20 and 20 ' are arranged, and connect opposite sides of adjacent slats 14 . Each sealing strip 42 is expediently arranged coaxially to the adjacent hinge axis 36 , so that the sealing strips 42 are only subjected to bending when the lamellar armor 12 is bent in the upper guide region. The sealing strips 42 engage with only a little lateral play in the direction perpendicular to the door leaf level in the slats 14 , so that the slat armor 12 is put under tension at a certain pressure in a pressure load, and corresponding return actuating forces act immediately against the pressure load. Each sealing strip 42 has beads or thickenings 44 on opposite sides, which engage in correspondingly shaped savings 46 from the lamellae 14 .

As can best be seen from the enlarged detail according to FIG. 3A, each thickening 44 has a support surface 43 which is arranged opposite a corresponding holding surface 45 of the lamella 14 . The distance of a support surface 43 to the associated holding surface 45 of the lamella 14 is - taking into account the requirement of a jam-free and interference-free assembly by inserting the sealing strip 42 with the thickening 44 into the recess 46 from the side - chosen as small as possible, so that in the closed position of the lamellar armor possibly to occurring pressure loads on the lamellar armor lead to the sealing strip 42 being tilted to the side and after the contacting of the support surface 43 with the holding surface 45, the sealing strip 42 to the two adjacent lamellas is subjected to tension. With even smaller deflections from the slat under consideration from the door leaf level, ie as long as the support surface 43 does not touch the opposite holding surface 45 , the sealing strip 42 is only subjected to bending to the two adjacent slats, which leads to the corresponding restoring forces. As the distance between the supporting surface 43 to the associated holding surface 45 is chosen to be minimal, in order to obtain stress on the sealing strip as far as possible even with small deflections, the pressure loads on the lamellar armor from the sealing strip 42 , which is initially directly affected, also occur on the neighboring sealing strips transferred and distributed. At a pressure load, the lamella armor according to the invention thus behaves largely like a homogeneous flat plate with a corresponding force distribution in the plate plane, but still allows a low-force deflection. Therefore, the sealing strips 42 cause a noticeable increase in the mechanical stability of the slat armor, so that the lifting gate in the closed position also withstands high wind or other pressure loads.

Of course, the lifting gate according to the invention also offers sufficient security against unauthorized opening, so that the Lift gate according to the invention as a permanent completion of a gate opening can be seen.

To prevent pulling out of the lamellar armor 12 in the event of the occurrence of even greater compressive forces, holding collars 27 , 27 'are arranged on the two opposite sides of the lamellar armor, which are embodied in the exemplary embodiment shown as an outer disk with a larger diameter than the diameter of the rollers 26 , 26 ' . The retaining collars 27 , 27 'are so (not shown in the drawing) a small distance from adjacent support surfaces of the guide rods 28 , 30 that they only with very strong deflection of the slats 14 under load on the outside of the guide rods 28 , 30 to Support come so that the slat armor remains easily actuated and movable at relatively low pressure loads. Due to the good distribution of forces outlined above the sealing strip 42 in the door leaf level, it is also avoided at point-by-point loading that the retaining collars 27 , 27 'of a loaded slat 14 reach support early due to their strong deflection and thereby hinder the movement of the slat armor.

In the embodiment shown in FIG. 3, each lamella 14 has a sealing lug 48 which projects on the outer side 38 in the door leaf plane, and due to which the distance to an adjacent lamella is reduced. Due to the sealing lug 48 , the sealing strip 42 is no longer recognizable from the outside in the closed position. The sealing strip 42 is then only visible from the inside (see rear view according to FIG. 2). At the same time, the design of the sealing nose 48 shown in FIG. 3 results in a more beautiful appearance of the lamellar armor 12 in the form of a more uniform, smooth surface.

As finger protection and thus to prevent injuries due to unintentional contact with moving parts, sealing lips 50 , 50 'are provided on the inside and outside of the gate as shown in FIG. 4, which project in the closed position to the position of the sealing strips 42 in the door leaf plane. The sealing lips located on the outside of the door opening 1 simultaneously form a seal against driving rain, dust or the like. The sealing lips can in turn be made of rubber, for example.

A sealing lip 52 formed analogously to this in cross-sectional shape is arranged in the region of the lintel 6 ( FIG. 5), and extends horizontally essentially over the entire width of the door opening. Through the sealing lip 52 is prevented that rain water or dirt penetrates into the upper region of the lifting gate.

For the bottom-side of the lifting door sealing a closure 54 is shown in FIG. 3 provided, for example made of rubber, which is fixed to the lowermost slat.

As already explained with reference to FIG. 1, the lifting gate according to the invention has the two guideways 2 and 2 ', which are present in the upper region of the gate and below the ceiling indicated by the reference number 55 as a spiral section 10 extending inwards. In the open position of the lifting gate, the lamella armor 12 can be moved into the spiral section in such a way that the plurality of lamellae are present in a spiral path and without contact with one another. In contrast to the known roller door, in which the roller shutter is wound on a winding shaft, the slat armor is always guided according to the invention in such a way that the slats do not touch one another anywhere. As a result, the pressure forces occurring on the roller shutter on the slats are completely avoided, so that a correspondingly quiet run that allows high speeds is made possible. In contrast to the conventional sectional door, the upper guideway is not guided as a straight line directly below the ceiling, which, particularly with larger door heights, led to a considerable amount of space in the depth of the door. In contrast, the spiral section 10 corresponding to the exemplary embodiment shown in FIG. 1 from the three arc sections 56 , 58 and 60 . As shown, a part of the arc section 60 is directly on the arc section 56 , so that the inner radius of the arc 56 speaks approximately to the outer radius of the arc 60 ent. The outer radius of the arc 58 corresponds to the outer radius of the arc 56 .

Referring to FIG. 1 the smallest possible occurring Krümmungsra dius of the guide track 2 is equal to the radius of the innermost lie constricting bow section 60. This radius is chosen so that depending on the distance d adjacent hinge pin (see Fig. 3) a proper entry of the slat armor 12 in the Spiralab section 10 is possible without, for example, self-locking of the angled slats in the narrowest arc section must be feared. Such self-locking would occur at the latest when at the entry of the lamellar armor 12 of the Kraftan directed parallel to the guideway part to overcome the rolling friction at any point on the guideway is smaller than the correspondingly acting rolling friction portion, which in turn is proportional to the position at this point existing normal force is. In practice, however, the smallest possible arc radius is already limited by the fact that the sealing strips are bent when the slats are angled, as a result of which restoring forces are generated which have to be wound by the drive of the lifting gate, and which are greater the closer the guide arc is selected.

Due to the spiral arrangement of the guideway 2 , the existing height g above the lintel area is optimally used. The arc sections 56 , 58 , 60 can be made standardized for all gate heights occurring in practice, so that regardless of the respective gate height, the lifting gate according to the invention offers the advantage of a unitary measure for the fall height. The adjustment of the total length of the guideway in accordance with the user-specific individual gate height is ensured by separately usable, horizontal extension sections 62 of length a. In the case shown, the length of the entire guideway 2 is approximately 3 × a increased by inserting the extension portions 62 . Since these extension parts essentially represent the only parts of the lifting gate that have to be individually manufactured or made available in accordance with the height of the gate, the lifting gate according to the invention can be manufactured inexpensively in large quantities and can therefore also be used for more everyday applications outside the industrial sector .

For further illustration, concrete numerical values are given below. With the usual clear door heights of h = 3 m, 4.5 m, 6 m, the values of the extension sections 62 are each a = 0 m, 0.5 m, 1 m, so that with a fixed value of the overall height above the lintel g = 0.5 m with an increase in the clear door height from 3 m to 6 m, the space only needs to increase in depth by 1 m. The diameter of the rollers 26 and thus the clear distance between the guide tracks is about 4 cm. With this arrangement it is possible, for example, to fully open the gate with the height h = 3 m in no less than 2 s.

Referring to FIG. 1, the electric motor 18 is arranged in the remaining inside the spiral portion 10 free space communicating with a drive roller 64 in conjunction. Through the dash-dotted line in Fig. 1, the endless chain 16 is indicated schematically, which is driven by the drive roller 64 and the motor 18 , and is guided over deflection rollers 66 , 68 , 70 ( Fig. 5), and 72 . On the opposite side 3 'of the gate (not shown) deflection rollers corresponding to the deflection rollers 68 , 70 , 72 are provided, and of which a deflection roller, for example via a coupling and a torsion shaft, is connected in a torsionally rigid manner to the deflection roller 72 designed as a gearwheel, and one drives another (not shown) endless chain. At this point, it is noted as a further advantage of the lifting gate according to the invention that, depending on the desired door width, the torsion shaft is the only component which is to be made with a corresponding length.

In the area of a lower slat, the endless chain 16 is fastened to the slat armor via a bracket 74 . Referring to FIG. 5, the connection of the chain to the strip cladding on purpose most moderate provided such that the tensile force acting on startup of the disk armor from the closed position to the open position extends completely within the plane of the door leaf, and thus horizontally extending force components are avoided, the would lead to a tilting moment of the lamellar armor, as a result of which forces would act on the guideways, which would try to push the guides apart, while the rollers would be subject to increased wear due to the massive load.

The bracket 74 also has, for example, a projecting, rigid end 76 which, when the door is open, strikes a rubber buffer 78 mounted above the lintel with almost no noise.

According to FIG. 6, a weight compensation 80 is provided to adapt the pulling force acting on the drive of the lifting gate to the respective weight of the free slat armor length, which has a compensation spring 82 and a band 84 fastened to it from a largely inelastic and tensile material. The lower end of the compensating spring 82 designed as a helical spring is firmly connected to the ground. Via a deflection roller 86 , the band 84 is wound up with a shaft 88 , which interacts, for example, via the deflection roller 72 shown in FIGS . 1 and 5 with the drive of the lifting gate, in such a way that the band 84 from the shaft 88 when the slat armature is raised is unwound and the spring 82 is relieved accordingly, and when the lamellar armor is lowered the band 84 is wound onto the shaft 88 with a correspondingly exerted tensile force on the compensating spring 82 , so that the latter is tensioned.

The shaft 88 has a predetermined core diameter, the value of which is selected such that, depending on the thickness of the band 84 , the length of rest L _{o of} the compensating spring 82 , the spring strength of the compensating spring 82 , and the total weight of the slat armor corresponding to the gate height, the desired characteristic of Weight compensation 80 according to FIG. 7 is achieved.

In Fig. 7, the respective clear height of the remaining door opening in millimeters is plotted for an exemplary clear door height of 3 m to the right, the value "0 mm" the completely closed door and the value "3000 mm" the fully open door reproduces, and upwards the total weight G _{T of} the free Lamellenpan zers acting on the drive is plotted as a continuous line, and the spring force F _F also acting on the drive is plotted as a dashed line. As can be seen from Fig. 7, the weight compensation 80 is set so that when the gate is closed, the compensation spring is stretched to such an extent that over the weight of the slat armor there is an excess spring force of approximately 260 N. This ensures that when the closed gate is actuated, the lamellar armor rises up to approximately the height at which the weight of the free Lamellenpan zers is in equilibrium with the corresponding spring force, even without an additional drive. In Fig. 7, this means the place where the two lines intersect, that is, at a height of approximately 1 m. When the gate is moved upwards, the respective weight is approximately in equilibrium with the spring force, so that the drive essentially only has to act against the existing frictional forces. Further details are readily apparent from FIG. 7 without needing further explanation.

For reasons of space, the lifting gate according to the invention is on the sides of the gate each with a weight balance provided at least one balancing spring.  

The weight balance shown here has decisive advantages over the known solutions. Compared to the torsion springs used in conventional sectional doors, the service life is significantly increased due to the use of an equalizing spring in the form of a coil spring. The service life of a coil spring is approximately twice the service life of a torsion spring. This reduces the problem of the cumbersome replacement of the power unit in the sectional door. Incidentally, the compensation springs since 82 have no space requirement via camber.

Another advantage of the weight balance according to the invention results from the use of the tape 84 , which has a thickness of 2 mm in the case shown. In comparison, if a wire rope were to be used, in particular a further translation, for example in the form of a loose roll, would be necessary, since a rope could only be wound up next to one another on a drum, with a correspondingly larger core diameter. According to the invention, however, the tape can be wound on a stub shaft with a relatively small core diameter without the tape rubbing through, so that additional translation means can be dispensed with. In addition, the tape is wound one on top of the other, so that, as desired, starting at the open position of the door, the winding radius quickly increases, but changes only slightly when the winding is almost completely wound in the closed position of the door.

As can be easily seen, those with the special the type of weight balance described achievable Main advantages of particular importance in combination with the other features of the present invention, they have but also independent meaning because of these advantages regardless of details of the design of the gate can be used.

Claims (6)

1. Lift gate with

• 1.1 a lamellar armor ( 12 ) which has a plurality of lamellas ( 14 ) which
  • 1.1.1 rigid,
  • 1.1.2 covering the width of the gate opening ( 1 ), and
  • 1.1.3 are designed such that they can be angled relative to one another; and
• 1.2 two guideways ( 2 , 2 '), the
  • 1.2.1 are each arranged on the two opposite sides ( 3 , 3 ') of the gate opening ( 1 ),
  • 1.2.2 starting from a vertical section ( 4 ) running approximately vertically over the height of the door opening ( 1 ),
  • 1.2.3 at the inlet ( 8 ) of the lifting gate into a spiral-shaped inward spiral section ( 10 ), in which the slat armor ( 12 ) in the open position of the lifting gate is so ver movable that the plurality of slats ( 14 ) in a spiral Web and against each other are available without contact.

2. Lift gate according to claim 1, characterized in that the spiral section ( 10 ) of the guideways ( 2 , 2 ') has a substantially horizontally extending, separately usable extension section ( 62 ). 3. Lift gate according to claim 1 or 2, characterized in that the guide tracks ( 2 , 2 ') are provided in the form of a pair of round bars ( 28 , 30 ). 4. A vertical lift gate according to any one of the preceding claims, characterized by a weight compensation (80) for adjustment of the force acting on the drive of the lifting door pulling force on the respective weight of the free strip cladding length, the weight compensation (80), a cash balance spring belast on train or pressure (82 ) and a from the equalization spring ( 82 ) attached band ( 84 ), which can be wound on a shaft ( 88 ) cooperating with the drive of the lifting gate in superimposed windings, and the shaft ( 88 ) has a predetermined core diameter. 5. Lift gate according to one of the preceding claims, characterized by an endless chain ( 16 ) connected to the slat armor ( 12 ), which can be driven by an electric motor ( 18 ). 6. Lifting gate according to one of the preceding claims, characterized by a sealing lip ( 52 ) which is arranged horizontally at almost the entire width of the gate at the inlet ( 8 ) of the lifting gate and which projects perpendicular to the door leaf level into the region of the guideways ( 2 , 2 ').