Abstract:
Disclosed is a tambour door comprising a door leaf that can be rolled up. The door comprises a vertical roller frame for receiving the door leaf, a sliding bar, to which the rollable door leaf is fixed, and an upper horizontal guide rail, in which the sliding bar is displaceably mounted. The invention facilitates a particularly simple, fixed to a wall and the guide rail is configured as a floating guide rail, which is fixed on one side at least indirectly to the roller frame and on the other side in a fixing element that is fastened at least indirectly to a wall. The door can be used as a lavatory door, or in situations requiring privacy protection for a door opening that economizes on space as much as possible.

Description:
TECHNICAL FIELD  
       [0001]     The present invention relates to a rolling door having a door leaf which can be rolled up, and to a method of installing the same.  
       PRIOR ART  
       [0002]     Rolling doors are used nowadays in particular in the industrial sector if the intention is for a door opening to be opened quickly and, if appropriate, automatically. It is possible here for the door opening to be closed in the vertical or horizontal direction.  
         [0003]     Thus, for example, EP 0149138 describes an automatic door with two door parts made of roll-up sheets which, for the purpose of the closing and opening operations, can be moved symmetrically in relation to one another in the horizontal direction and are rolled up on rollers. U.S. Pat. No. 4,096,902 describes a similar rolling door in which the sheets are moved via a mechanism using a toothed belt. A further rolling door is described in U.S. Pat. No. 490,448, in which it is possible for a single door leaf comprising segments to be moved via a high-outlay cable mechanism.  
       DESCRIPTION OF THE INVENTION  
       [0004]     Accordingly, the object of the invention is to provide a rolling door which is cost-effective to produce, does not take up much space and is straightforward to construct and activate, this in conjunction with a rolling door having a door leaf which can be rolled up, having a vertical roller casing for accommodating the door leaf, having a sliding bar which can be displaced in the horizontal direction and on which the roll-up door leaf is fastened, and having a horizontal guide rail which is located at the top and in which the sliding bar is mounted in a displaceable manner.  
         [0005]     This object is achieved in that the roller casing is or can be fastened on a wall by way of its rear side or its outer side, and the guide rail is designed as a free guide rail which is fastened, on one side, at least indirectly on the roller casing and, on the other side, in a holder attached at least indirectly to a wall.  
         [0006]     The core of the invention is thus to provide a simplified construction using a free guide rail, i.e. a guide rail which is only fastened or secured at its ends. On one side, in this case, the guide rail is fastened at least indirectly on the roller casing, i.e. it is sufficient to fasten the roller casing on the wall on the one side and to fit the holder on the other side. In particular a rolling door according to the invention proves to be advantageous when, for example in the case of toilet cubicles, there is no lintel present. The straightforward modular construction allows cost-effective production of the individual parts and installation of the rolling door which does not require high outlay. Moreover, the construction proposed allows the guide rail to be adapted to the inside width of the door simply by means of cutting to length. This is made possible in that the guide rail is fastened, on both sides, in holders which allow a certain amount of tolerance for the length of the guide rail. The production of different lengths of guide rails can thus largely be done away with. The bottom edge of the rolling door, which is exposed as a result of the door being guided exclusively at the top edge, can be spaced apart from the floor, as a result of which, and this may be important in particular if the door is used as a toilet door, it is easier to clean the door region and good ventilation of the interior is made possible.  
         [0007]     A first preferred embodiment of the rolling door according to the invention is distinguished in that the guide rail is designed as a hollow profile, a pulling carriage with running rollers preferably being mounted in a displaceable manner in the hollow profile, and the hollow profile also preferably having exclusively a slot which is open in the downward direction and through which the pulling carriage is connected to the sliding bar. It is possible here, in particular, for the guide rail to be configured as a tube of essentially circular cross section, and for the pulling carriage to comprise at least one pair, in particular preferably two pairs arranged one behind the other, of running rollers which are arranged to the sides of the pulling carriage, have a curved running surface and on which inner surfaces of the tube which are present alongside the slot run. Using a straightforward tube as the guide rail proves to be particularly favorable in production terms and results in a pleasing appearance. The curved inner running surfaces which are thus available can be used to good effect in combination with curved running surfaces of the running rollers.  
         [0008]     A further preferred embodiment of the rolling door is characterized in that a motor for displacing the sliding bar is arranged in or on the roller casing, and in that this displacement takes place via a spindle which is driven by the motor. The spindle here is preferably arranged in the interior of the guide rail and engages in at least one internal thread in the pulling carriage, this thread being adapted to the characteristics of the spindle. It proves to be advantageous here if the spindle, on the side which is directed away from the roller casing, is mounted in the holder. Using a spindle for moving the sliding bar proves to be very reliable and to save a lot of space and, moreover, such a design is easy to realize. It is also possible here for the axis of the motor to be arranged perpendicularly to the plane of the door on or in the roller casing and for power to be transmitted to the spindle via an angular gear mechanism. The braking functions which are necessary, inter alia, for safety reasons, are preferably arranged, in particular, along with the motor, rather than with the gear mechanism, in order for the associated step-up transmission to be utilized. The spindle is preferably inserted into an internally threaded (blind) hole provided in the motor-gear mechanism, and is fixed therein via a locking screw. It is thus easily possible to compensate for inaccuracies in length which arise when the spindle is cut to length.  
         [0009]     Another embodiment of the rolling door, furthermore, has a counter-profile on that side of the door which is located opposite the roller casing. This counter-profile is fastened on a wall and is designed for stopping the sliding bar when the door is closed. Correspondingly, it is possible for the counter-profile to be adapted in shaping to the front edge of the sliding bar, in order to effect the best possible sealing when the door is closed (this can take place, for example, via a seal which is arranged on the front edge of the sliding bar and has a specific profile which engages in a corresponding profile in the counter-profile). As an alternative, however, it is also possible for the sliding bar simply to be guided behind a wall protrusion. It is preferable here for the holder for the guide rail to be designed as a top covering for this counter-profile and to be connected firmly thereto. In other words, rather than the holder being fastened directly on the wall, in the first instance the counter-profile is screwed on and then the holder is positioned on the counter-profile from above as a covering. This modular construction may prove to be advantageous for installation purposes.  
         [0010]     For controlling or actuating the door (opening or closing), according to another embodiment of the invention, a switch for the contactless operation of the rolling door is arranged on the roller casing, preferably on its inner side, which is arranged perpendicularly to the plane of the door leaf (in order to avoid the situation where, e.g. if used as a toilet door, the door is opened accidentally). The contactless switch proves to be advantageous, in particular, in terms of hygiene. This switch is preferably designed as a single switch which activates the motor logically in each case in dependence on the position of the door leaf. This means that, when the door is closed, activation of the switch automatically opens the door and that, when the door is open, activation of the switch automatically causes the door to be closed.  
         [0011]     For safety reasons, it may be advantageous, according to another preferred embodiment, to provide the sliding bar with a mechanism which allows the sliding bar to tilt if, when the rolling door is being closed, an obstacle is located in the inside width of the door. It is possible here for the mechanism to be designed, for example, as a bar or fork which is arranged vertically and connected rigidly to the pulling carriage and is attached to the sliding bar via a pivot pin arranged perpendicularly to the door leaf. This pivot pin is preferably arranged in the top third of the sliding bar, and means are provided for fixing the sliding bar in a vertical position and for releasing the same such that it can be rotated about the pin only when a certain leverage about this pin is exceeded.  
         [0012]     The operation of securing the roll-up door leaf can be realized by the roller casing containing a roller body onto which the roll-up door leaf is rolled, the roller body containing a torsion spring such that, when the door leaf is being closed, it is unwound from the roller body counter to the spring force, and the energy which is built up in the process, in particular, is preferably sufficient for rolling up the door leaf onto the roller body again, without any further motor power, when the rolling door is opened. Such a mechanism proves to be advantageous particularly in respect of the door being opened in an emergency (e.g. also in the event of power failure).  
         [0013]     Such a rolling door may have an exchangeable roll-up door leaf or an exchangeable roller body, in order that the door surface, which can be used for example for advertising purposes, is easy to exchange or, in the case of a defect, to replace. The door leaf may be formed from at least partially textile woven fabric, possibilities here being, in particular, laminates made of plastics and woven fabrics. Depending on requirements, the material has different properties, e.g. coloring, surface configuration, resistance to chemicals, etc. The surface, moreover, can have printing applied to it and can be used correspondingly for advertising graphics or the like. The advertising graphics thus appear each time the door is closed and disappear again when the door is opened. The default position is normally that in which the door is open.  
         [0014]     Further preferred embodiments of the rolling door according to the invention are described in the dependent claims.  
         [0015]     The present invention also relates to the use of a rolling door as described above as straightforward interior shutters, e.g. for furniture and pieces of equipment, as a toilet door, a door for changing cubicles, talk booths such as phone booths, as photo booths, or as a partition door in or on public transport. It proves to be advantageous for these uses, in particular, as a result of its space-saving construction (no pivoting region, thus, for example, more toilet cubicles per square meter, possible straightforward provision of toilet cubicles for the disabled). In quite general terms, it is thus possible to use this door in situations where a door opening is to be provided in as space-saving a manner as possible, in particular, with a screen.  
         [0016]     The present invention further relates to a method of installing a rolling door as described above. In particular here, the roller casing is fastened on a wall on one side of the door opening, thereafter the guide rail and, if appropriate, the spindle are cut to a length corresponding to the inside width of the door opening, and then the holder or, if appropriate, the counter-profile, on which the holder is fastened, is fastened on the other side of the door opening, the guide rail and also, if one is present, the spindle being fastened between the roller casing and holder.  
         [0017]     Further preferred embodiments can be gathered from the dependent claims. 
     
    
     BRIEF EXPLANATION OF THE FIGURES  
       [0018]     The invention will be explained in more detail hereinbelow, with reference to exemplary embodiments, in conjunction with the drawing, in which:  
         [0019]      FIG. 1  shows a perspective view of a rolling door in a half-closed position;  
         [0020]      FIG. 2  shows a horizontal section through a rolling door;  
         [0021]      FIG. 3  shows a perspective view of the drive mechanism of the rolling door;  
         [0022]      FIG. 4  shows a view of the guide carriage;  
         [0023]      FIG. 5  shows a vertical section through the guide rail with pulling carriage;  
         [0024]      FIG. 6   a ) shows a view of the sliding bar in the vertical position; b) shows a view of the sliding bar in the tilted position;  
         [0025]      FIG. 7  shows a view of an attachment for the roller body for the textile; and  
         [0026]      FIG. 8  shows a tube for the torsion spring of the roller body. 
     
    
     WAYS OF IMPLEMENTING THE INVENTION  
       [0027]      FIG. 1  shows a perspective view of an exemplary embodiment of a rolling door  1 . In specific terms, this is a door for a toilet cubicle. Partition walls are arranged here to the right and left of the door opening (essentially only as a screen, not depicted); a door lintel, on the other hand, is not present. On one side, the roller casing  2  is arranged in the vertical direction. The roller casing  2  has a front side  14 , which is directed toward the interior of the toilet cubicle. It is also has an outer side  15 , an inner side  16 , which is directed toward the door opening, and a rear side  17 . It is possible for the roller casing  2  either to have its outer side  15  fastened on a side wall of the toilet cubicle or to have its rear side  17  fitted on a wall part which is arranged parallel to the plane of the door opening (end-side installation). The fastening using the outer side  15  proves to be particularly advantageous, in particular, when the individual cubicles are only separated from one another by partition walls which are arranged perpendicularly to the plane of the door opening. The roller casing  2  may (optionally) be supported on the floor via a supporting foot  7 . At its top end, the roller casing is provided with a top covering  12 . The drive means are arranged beneath the covering  12 . The roller casing serves for accommodating the roller body and thus provides the necessary barrier to access. The control and operating elements are additionally accommodated in this casing.  
         [0028]     A guide rail  10  is arranged at right angles to the roller casing  2  and above the door opening. A vertically arranged counter-profile  8  is located on that side of the door opening which is located opposite the roller casing  2 . It is possible for this counter-profile  8  either to have its rear side  19  screwed firmly to a wall arranged parallel to the plane of the door opening (end-side installation) or, in particular if only partition walls are provided, as has been mentioned above, to have the outer side  18  fastened on such a partition wall, which is arranged perpendicularly to the plane of the door opening. The counter-profile  8  is covered by a holder  11  at its top end. This holder  11  serves simultaneously as a top covering for the counter-profile  8 , as a termination or guide component for the guide rail  10  and as a mount for a spindle  32  arranged in the guide rail  10 .  
         [0029]     The guide rail  10  thus has one side embedded in the holder  11 . At the other, roller-casing end, the guide rail  10  is mounted in the top covering  12  or in elements arranged beneath this covering. The guide rail  10  has an essentially circular cross section, a slot being arranged on the underside, with the result that a guide element arranged in the guide rail  10  can guide the door leaf. For this purpose, the rolling door  1  also has a vertical sliding bar  4 , on which a roll-up door leaf  3  is fastened, on one side, over the entire height. The sliding bar  4  has a length which corresponds essentially to the height of the sheet of the door leaf  3  and which does not reach to the floor. A spacing thus remains between the bottom edge of the sliding bar  4  or the bottom edge  6  of the door leaf  3  and the floor. The door leaf  3  is not guided on its underside, and the abovementioned spacing allows straightforward cleaning of the floor in the door region.  
         [0030]     The roller casing  2  has, on its inner side  16 , on the one hand, a lateral slot  13  which extends over essentially the entire height of the roller casing and through which the sheet of the door leaf  3  is guided. On the other hand, a switch  9  is arranged on the inner side  16 , approximately half way up the latter or at a somewhat lower level. Via this switch  9 , which is designed as a contactless switch, it is possible to activate the opening or closing operation of the door. The switch  9  is realized in a single printed circuit board and can be triggered if approached at a distance of a few cm. It may be triggered here, for example, optically. A logic circuit which activates the motor in accordance with the closure state of the door is provided here. In other words, proximity to the switch when the door is closed opens the door, whereas proximity to the switch when the door is open causes the door to be closed. Arranging the switch  9  on the inner side  16  of the roller casing  2  (i.e. on the side of the roller) together with the sensitivity within a range of not more than 10 cm proves to be advantageous since, in particular if the door is a toilet door, it is thus possible to prevent the door from being opened accidentally, for example when someone is undressing. In order also to prevent the possibility of the door being closed from the outside by reaching through the door opening without someone being present inside the cubicle, the logic circuitry, moreover, is designed such that the hand has to be held in front of the switch  9  at least within the first two seconds of the closing operation (i.e. typically until the door is approximately at least half-closed).  
         [0031]      FIG. 2  shows a horizontal section through the roller casing  2  in the central region with the door drawn back to the maximum extent. The roller casing  2  has a width of 8 cm and a depth of 18 cm and is produced from plastic or metal (e.g. Al, anodized). It has a rounded portion  25  in the front region. In addition, fastening profiles  24  are provided on the outer side  15  and on the rear side  17  in order to allow simplified fastening of the roller casing on a wall. Arranged vertically in the roller casing is a roller body  28  onto which the door leaf  3  can be rolled up, this roller body thus serving as a winding body for the textile. For this purpose, the roller body  28  has vertical fastening grooves  29  in which one side of the sheet of the door leaf can be fastened. The door leaf  3  is guided out of the roller casing  2  via a slot  13 . For improved guidance of the door leaf  3 , guide loops (e.g. made of plastic) are fastened on this slot  13 , preferably on both sides, and feed the sheet in a controlled manner, in particular on the inner side of the roller casing  2 , to the slot. The sliding bar  4 , for its part, has a fastening groove  26  in which the sheet of the door leaf  3  is fastened on the other side, over essentially the entire height. Moreover, on the side which is directed toward the door opening, the sliding bar  4  has a seal  5  which extends over the entire length of the sliding bar  4  and is made of soft plastic (edge-protection rubber). This seal  5  is secured in the profile of the sliding bar  4  via at least one fastening protrusion  27 . The seal  5  serves, on the one hand, for optimum sealing of the door in relation to the counter-profile  8  and, on the other hand, for damping purposes in the event of the sliding bar colliding with an object located in the inside width of the door. With the sliding bar  4  drawn in to the full extent, there is a spacing of approximately 12 to 13 cm between the outer side  15  of the roller casing  2  and the front edge of the sliding bar  4  or of the seal  5 . This arrangement is thus extremely compact and is advantageous, in particular, even when a large door opening has to be provided (e.g. in toilets for the disabled).  
         [0032]      FIG. 3  shows a perspective view of the drive means for the rolling door, with an attachment plate  31  which can be positioned on the vertical roller-casing profile, which is open in the upward direction (see, for this purpose, the protrusions provided in the downward direction). The arrangement shown in this figure, with the door installed, is covered by the covering  12 . The motor  36  is fitted on the attachment plate  31 . The axis  38  of the motor  36  is arranged horizontally and in a direction perpendicular to the guide rail  10 . A brake for the motor  36  is arranged beneath the end cap in the region of  38 . The moment produced by the motor  36  is converted, via an angular gear mechanism  37  arranged in a casing, into a rotation about an axis parallel to the guide rail  10 . A spindle  32 , which is arranged in the guide rail  10 , essentially along the axis of this guide rail, is driven in the process. The spindle has, for example, a pitch of 50 millimeters. It is necessary here to find a compromise between quick, controlled door movement and the lowest possible opposing force in the situation where the torsion spring, e.g. in particular in the event of emergency opening, is intended to displace the sliding bar into the open position without being assisted by the motor. The spindle  32 , on this side, has an external thread at its end. The angular gear mechanism  37 , for its part, for the purpose of coupling the spindle  32 , has a blind hole with an internal thread for accommodating the spindle  32 . The spindle is correspondingly screwed into this blind hole and then fixed therein by means of a locking screw  33 . This method of fastening the spindle  32  allows a certain amount of tolerance in the length of the spindle  32  during installation. This is important, in particular, since typically different door openings are present at construction sites and, correspondingly, both the guide rail  10  and the spindle  32 , which are both mounted in the holder  11  on the other side, have to be cut to length corresponding to the inside width of the door.  
         [0033]     The sliding bar  4  is moved in the closing direction by the spindle drive. In this case, the textile is unrolled from the roller body  28 . At the same time, the torsion spring integrated in the roller body is subjected to stressing. The textile is thus tensioned, without bunching, in any position.  
         [0034]     For emergency situations, the motor also has possible means of opening the door either from the outside (e.g. by means of a square-end tool) or from the inside (e.g. by means of a lever). These possible means are of purely mechanical configuration, in order that this actuation is possible even in the event of a power failure, this being the case in that, for such an opening, essentially only a brake arranged in the region of the angular gear mechanism is released, and in that sufficient energy is stored in the torsion spring of the roller body in order to allow the rolling door to open automatically. In the event of an emergency opening, the motor rotates along in the manner of a generator and thus gives rise to a continuous opening movement (no spring-back movement). As a result of the low door-leaf weight and the disengaging mechanism of the sliding bar (which will be described at a later stage in the text), it is possible to do away with light barriers, safety strips and the like. The impact energy is thus low and cannot result in injury.  
         [0035]     The motor-gear mechanism unit thus provides a means of mounting and driving the spindle  32 . By virtue of the motor power being monitored, end positions and possible obstacles can be detected. The directly attached holding brake guarantees the secure closed position.  
         [0036]      FIG. 4  illustrates the carrying mechanism for the sliding bar  4  together with the spindle  32 , the guide rail  10  having been removed. A pulling carriage  39  made of plastic is located in a displaceable manner on the spindle  32 . The pulling carriage has two pairs of running rollers  40  and  41  which are respectively arranged laterally and one behind the other. Using two pairs of running rollers which are arranged one behind the other and have a height corresponding essentially to the height available in the guide rail  10  means that there is no need to use the usually present counter-pressure rollers for stabilizing purposes if the pulling carriage  39  is subjected to a torque (e.g. when the sliding bar strikes against an obstacle). Since the running rollers run in the interior of the guide rail  10  with a round cross section, they have a curved running surface  42  (approximately hemispherical). The running rollers are each simply plugged onto resilient supports  43  (straightforward slotted plastic cylinders with an encircling protrusion on the outside). Fastened on the underside of the pulling carriage  39  is a vertical, rigid hollow cylinder  44 , in which the sliding bar  4  is fastened.  
         [0037]     The spindle thus moves the pulling carriage in the longitudinal direction. The guide forces which occur are transmitted to the guide rail  10  by guide rollers arranged in pairs. The semicircular geometry of the guide rollers can ideally make allowances for angle deviations and transverse movements.  
         [0038]      FIG. 5  shows a corresponding view in a plane perpendicular to the spindle  32 . The pulling carriage  39  has at least one inner running thread  47 , in which the thread of the spindle  32  engages and via which the pulling carriage  39  is displaced when the spindle  32  is rotated.  FIG. 5  also illustrates the guide rail  10 , and it can thus be seen how the running rollers  40 / 41  run in the guide rail  10 . The cylinder  44  projects out through a slot  48  on the underside of the guide rail  10 . The sliding bar  4  has a fork  45  which, for its part, engages in the cylinder  44  via a fastening pin  49 . For this purpose, the cylinder  44  contains an inner, encircling groove which accommodates a retaining ring on the fastening pin  49 , this ring being arranged in the groove designated  50  in  FIG. 6   a ), when the fastening pin  49  is pushed into the cylinder  44 . This ensures firm, but possibly rotatable fastening of the sliding bar  4  on the pulling carriage  39 . The fork  45  is thus arranged rigidly in the vertical direction. The fork  45  is, to a certain extent, concealed in two vertically running cutouts in the profile of the sliding bar  4 , these each being arranged to the sides of the fastening groove  26 . At its bottom end, the fork  45  is attached to the sliding bar  4  via a pivot pin  51 . As can be seen from  FIG. 6   b ), this fastening of the fork  45  on the sliding bar  4  allows the sliding bar  4  to tilt if, e.g. when the door is being closed, an object is located in the inside width of the door opening. It is thus possible to prevent the situation where, for example, somebody gets caught in the door. In order nevertheless to ensure rigid fixing of the fork  45  or sliding bar  4  during normal operation, the underside of the fork  45  contains a socket  52  which, for its part, in the vertical position of the sliding bar  4 , ends up located on a ball  53  which is arranged at the top end of the sliding bar  4  and is resiliently mounted via an adjustment spring. This connection thus only releases the vertical connection of the sliding bar  4  when a certain leverage is achieved about the pin  51 . This force can be adjusted via the adjustment spring of the ball  53 . Once the sliding bar  4  has been disengaged from its vertical position (as is illustrated in  FIG. 6   b ), then it is automatically fixed in the vertical position again either when the sliding bar  4  is guided into the fully closed position or when the sliding bar  4  is displaced into the fully open position.  
         [0039]      FIG. 7  shows the top part of half of the roller body  28 . It can be gathered here how the roller body, which is of exchangeable configuration, is mounted via a pin  54  in a bearing location arranged on the underside of the attachment plate  31 . The pin  54  is mounted in a displaceable manner via an adjustment spring  55 , with the result that, for exchange purposes, the roller body  28  can be pushed into the bearing location from beneath by way of the pin  54 , and can then also be fixed on the underside.  
         [0040]      FIG. 8  shows the torsion-spring unit  58  of the roller body  28 . This unit is pushed from beneath into the tube which is illustrated in  FIG. 7 . In order to be capable of accommodating the fastening grooves  29 , the head part  59 , for its part, has grooves  60 . The torsion-spring unit  58  has a tube  56 , in which the torsion spring is arranged such that at its top end, in the region of the head part  59 , it is connected firmly to the torsion-spring unit  58  and is otherwise rotatable in the tube  56 . The torsion-spring unit  58  has, at its bottom end, a foot part  61 , which likewise has grooves  60  for the fastening grooves  29 . The foot part  61  terminates the tube of the roller body  28  in the downward direction. A fixing means  62  for the torsion spring can likewise be gathered from this figure. This fixing means is connected firmly to the bottom end of the torsion spring and can be pushed into a rotationally fixed holder in the roller casing  2 . For very straightforward exchange of the roller body, which may even be carried out without tools, all that is correspondingly required is to exchange the tube with the textile door leaf fastened thereon. The torsion spring, on the one hand, ensures that the textile is tensioned without bunching and, on the other hand, provides the necessary emergency-opening energy.  
         [0041]     The same components can be used to realize doors which, depending on requirements, open to the left or right. The conversion can be done in just a small number of installation steps and can be carried out by the fitter on site.  
         [0042]     By virtue of the spindle and the guide rail  10  being cut to length, the displacement and/or the inside width can be adapted specifically to the conditions in hand. The cut-to-length parts do not require any further machining and can be installed right away. The proposed design makes it possible to realize variable door widths.  
         [0043]     In respect of the control or power supply for individual doors, e.g. in an area with a plurality of toilet cubicles, it is recommended to work with extra-low voltage (direct-current motors are used correspondingly) and to provide one transformer for each drive group. The individual doors may be connected in series and, in respect of the power, the system may be designed that in each case only 4 doors can be closed simultaneously upon activation, for example, of 10 doors in an area. Fewer safeguarding measures thus need be taken and, as a result of just one transformer being used, the costs are reduced.  
         [0044]     To summarize, the proposed door system has the following advantages: 
        Contactless, hygienic door operation     Automatic and reliable movement of the door element (without additional sensors)     Automatic emergency opening if required     Optimum movement procedure; sliding movement means that no pivoting region is necessary.     Screening     Pleasing design     The door elements do not require much space, and there is therefore more space in the cubicle     Door element can be used as “rolling” advertising surface.     Flexible installation for variable installation situations (only lateral fastening). No lintel and no guidance on the floor required     By virtue of a minimal door-leaf weight, it is possible to do away with safety elements external to the drive.     Straightforward replacement of existing “manually operated doors”.     Hygiene as a result of being clear of the floor (floor cleaning is facilitated).     Straightforward modular construction     Adaptability to construction directly on site during installation        
 
       LIST OF DESIGNATIONS  
       [0000]    
       
           1  Rolling door  
           2  Roller casing  
           3  Textile door leaf  
           4  Sliding bar  
           5  Seal of  4   
           6  Bottom edge of  3   
           7  Supporting foot  
           8  Counter-profile  
           9  Switch (contactless)  
           10  Guide rail  
           11  Holder for the guide rail  
           12  Top covering of roller casing  
           13  Slot for  3  in roller casing  
           14  Front side of  2   
           15  Outer side of  2   
           16  Inner side of  2   
           17  Rear side of  2   
           18  Outer side of  8   
           19  Rear side of  8   
           20  Inner side of  8   
           21  Top edge of  3   
           22  Gap between  3  and  10   
           23  Guide loops on  13   
           24  Fastening profile on  2  (inside)  
           25  Rounded portion  
           26  Fastening groove for  3  in  4   
           27  Fastening protrusion of  5   
           28  Roller body  
           29  Fastening groove for  3  in  28   
           30  Vertical axis of  28   
           31  Attachment plate  
           32  Spindle  
           33  Locking nut  
           34  Guide for  10   
           35  Protrusion for slot in  10   
           36  Motor  
           37  Angular gear mechanism  
           38  Axis of  36 , region of the brake of the motor  
           39  Pulling carriage  
           40  Front running rollers  
           41  Rear running rollers  
           42  Curved running surface of  40  and  41   
           43  Support for  40  and  41   
           44  Vertical, rigid hollow cylinder on  39   
           45  Fork  
           46  Cavity of  10   
           47  Running thread in  39  for  32   
           48  Slot in  10   
           49  Fastening pin on  45   
           50  Groove for retaining ring in  49   
           51  Pivot pin of  45   
           52  Socket  
           53  Resiliently mounted ball for  52   
           54  Pin  
           55  Adjustment spring for  54   
           56  Tube for torsion spring  
           57  Mount for pin  54   
           58  Torsion-spring unit  
           59  Head part of  58   
           60  Grooves for  28   
           61  Foot part of  58   
           62  Fixing means for torsion spring